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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2014-2015, 2022 MediaTek Inc.
4 * Author: Chaotian.Jing <chaotian.jing@mediatek.com>
5 */
6
7#include <linux/module.h>
8#include <linux/bitops.h>
9#include <linux/clk.h>
10#include <linux/delay.h>
11#include <linux/dma-mapping.h>
12#include <linux/iopoll.h>
13#include <linux/ioport.h>
14#include <linux/irq.h>
15#include <linux/of_address.h>
16#include <linux/of_device.h>
17#include <linux/of_irq.h>
18#include <linux/of_gpio.h>
19#include <linux/pinctrl/consumer.h>
20#include <linux/platform_device.h>
21#include <linux/pm.h>
22#include <linux/pm_runtime.h>
23#include <linux/pm_wakeirq.h>
24#include <linux/regulator/consumer.h>
25#include <linux/slab.h>
26#include <linux/spinlock.h>
27#include <linux/interrupt.h>
28#include <linux/reset.h>
29
30#include <linux/mmc/card.h>
31#include <linux/mmc/core.h>
32#include <linux/mmc/host.h>
33#include <linux/mmc/mmc.h>
34#include <linux/mmc/sd.h>
35#include <linux/mmc/sdio.h>
36#include <linux/mmc/slot-gpio.h>
37
38#include "cqhci.h"
39
40#define MAX_BD_NUM 1024
41#define MSDC_NR_CLOCKS 3
42
43/*--------------------------------------------------------------------------*/
44/* Common Definition */
45/*--------------------------------------------------------------------------*/
46#define MSDC_BUS_1BITS 0x0
47#define MSDC_BUS_4BITS 0x1
48#define MSDC_BUS_8BITS 0x2
49
50#define MSDC_BURST_64B 0x6
51
52/*--------------------------------------------------------------------------*/
53/* Register Offset */
54/*--------------------------------------------------------------------------*/
55#define MSDC_CFG 0x0
56#define MSDC_IOCON 0x04
57#define MSDC_PS 0x08
58#define MSDC_INT 0x0c
59#define MSDC_INTEN 0x10
60#define MSDC_FIFOCS 0x14
61#define SDC_CFG 0x30
62#define SDC_CMD 0x34
63#define SDC_ARG 0x38
64#define SDC_STS 0x3c
65#define SDC_RESP0 0x40
66#define SDC_RESP1 0x44
67#define SDC_RESP2 0x48
68#define SDC_RESP3 0x4c
69#define SDC_BLK_NUM 0x50
70#define SDC_ADV_CFG0 0x64
71#define EMMC_IOCON 0x7c
72#define SDC_ACMD_RESP 0x80
73#define DMA_SA_H4BIT 0x8c
74#define MSDC_DMA_SA 0x90
75#define MSDC_DMA_CTRL 0x98
76#define MSDC_DMA_CFG 0x9c
77#define MSDC_PATCH_BIT 0xb0
78#define MSDC_PATCH_BIT1 0xb4
79#define MSDC_PATCH_BIT2 0xb8
80#define MSDC_PAD_TUNE 0xec
81#define MSDC_PAD_TUNE0 0xf0
82#define PAD_DS_TUNE 0x188
83#define PAD_CMD_TUNE 0x18c
84#define EMMC51_CFG0 0x204
85#define EMMC50_CFG0 0x208
86#define EMMC50_CFG1 0x20c
87#define EMMC50_CFG3 0x220
88#define SDC_FIFO_CFG 0x228
89#define CQHCI_SETTING 0x7fc
90
91/*--------------------------------------------------------------------------*/
92/* Top Pad Register Offset */
93/*--------------------------------------------------------------------------*/
94#define EMMC_TOP_CONTROL 0x00
95#define EMMC_TOP_CMD 0x04
96#define EMMC50_PAD_DS_TUNE 0x0c
97
98/*--------------------------------------------------------------------------*/
99/* Register Mask */
100/*--------------------------------------------------------------------------*/
101
102/* MSDC_CFG mask */
103#define MSDC_CFG_MODE BIT(0) /* RW */
104#define MSDC_CFG_CKPDN BIT(1) /* RW */
105#define MSDC_CFG_RST BIT(2) /* RW */
106#define MSDC_CFG_PIO BIT(3) /* RW */
107#define MSDC_CFG_CKDRVEN BIT(4) /* RW */
108#define MSDC_CFG_BV18SDT BIT(5) /* RW */
109#define MSDC_CFG_BV18PSS BIT(6) /* R */
110#define MSDC_CFG_CKSTB BIT(7) /* R */
111#define MSDC_CFG_CKDIV GENMASK(15, 8) /* RW */
112#define MSDC_CFG_CKMOD GENMASK(17, 16) /* RW */
113#define MSDC_CFG_HS400_CK_MODE BIT(18) /* RW */
114#define MSDC_CFG_HS400_CK_MODE_EXTRA BIT(22) /* RW */
115#define MSDC_CFG_CKDIV_EXTRA GENMASK(19, 8) /* RW */
116#define MSDC_CFG_CKMOD_EXTRA GENMASK(21, 20) /* RW */
117
118/* MSDC_IOCON mask */
119#define MSDC_IOCON_SDR104CKS BIT(0) /* RW */
120#define MSDC_IOCON_RSPL BIT(1) /* RW */
121#define MSDC_IOCON_DSPL BIT(2) /* RW */
122#define MSDC_IOCON_DDLSEL BIT(3) /* RW */
123#define MSDC_IOCON_DDR50CKD BIT(4) /* RW */
124#define MSDC_IOCON_DSPLSEL BIT(5) /* RW */
125#define MSDC_IOCON_W_DSPL BIT(8) /* RW */
126#define MSDC_IOCON_D0SPL BIT(16) /* RW */
127#define MSDC_IOCON_D1SPL BIT(17) /* RW */
128#define MSDC_IOCON_D2SPL BIT(18) /* RW */
129#define MSDC_IOCON_D3SPL BIT(19) /* RW */
130#define MSDC_IOCON_D4SPL BIT(20) /* RW */
131#define MSDC_IOCON_D5SPL BIT(21) /* RW */
132#define MSDC_IOCON_D6SPL BIT(22) /* RW */
133#define MSDC_IOCON_D7SPL BIT(23) /* RW */
134#define MSDC_IOCON_RISCSZ GENMASK(25, 24) /* RW */
135
136/* MSDC_PS mask */
137#define MSDC_PS_CDEN BIT(0) /* RW */
138#define MSDC_PS_CDSTS BIT(1) /* R */
139#define MSDC_PS_CDDEBOUNCE GENMASK(15, 12) /* RW */
140#define MSDC_PS_DAT GENMASK(23, 16) /* R */
141#define MSDC_PS_DATA1 BIT(17) /* R */
142#define MSDC_PS_CMD BIT(24) /* R */
143#define MSDC_PS_WP BIT(31) /* R */
144
145/* MSDC_INT mask */
146#define MSDC_INT_MMCIRQ BIT(0) /* W1C */
147#define MSDC_INT_CDSC BIT(1) /* W1C */
148#define MSDC_INT_ACMDRDY BIT(3) /* W1C */
149#define MSDC_INT_ACMDTMO BIT(4) /* W1C */
150#define MSDC_INT_ACMDCRCERR BIT(5) /* W1C */
151#define MSDC_INT_DMAQ_EMPTY BIT(6) /* W1C */
152#define MSDC_INT_SDIOIRQ BIT(7) /* W1C */
153#define MSDC_INT_CMDRDY BIT(8) /* W1C */
154#define MSDC_INT_CMDTMO BIT(9) /* W1C */
155#define MSDC_INT_RSPCRCERR BIT(10) /* W1C */
156#define MSDC_INT_CSTA BIT(11) /* R */
157#define MSDC_INT_XFER_COMPL BIT(12) /* W1C */
158#define MSDC_INT_DXFER_DONE BIT(13) /* W1C */
159#define MSDC_INT_DATTMO BIT(14) /* W1C */
160#define MSDC_INT_DATCRCERR BIT(15) /* W1C */
161#define MSDC_INT_ACMD19_DONE BIT(16) /* W1C */
162#define MSDC_INT_DMA_BDCSERR BIT(17) /* W1C */
163#define MSDC_INT_DMA_GPDCSERR BIT(18) /* W1C */
164#define MSDC_INT_DMA_PROTECT BIT(19) /* W1C */
165#define MSDC_INT_CMDQ BIT(28) /* W1C */
166
167/* MSDC_INTEN mask */
168#define MSDC_INTEN_MMCIRQ BIT(0) /* RW */
169#define MSDC_INTEN_CDSC BIT(1) /* RW */
170#define MSDC_INTEN_ACMDRDY BIT(3) /* RW */
171#define MSDC_INTEN_ACMDTMO BIT(4) /* RW */
172#define MSDC_INTEN_ACMDCRCERR BIT(5) /* RW */
173#define MSDC_INTEN_DMAQ_EMPTY BIT(6) /* RW */
174#define MSDC_INTEN_SDIOIRQ BIT(7) /* RW */
175#define MSDC_INTEN_CMDRDY BIT(8) /* RW */
176#define MSDC_INTEN_CMDTMO BIT(9) /* RW */
177#define MSDC_INTEN_RSPCRCERR BIT(10) /* RW */
178#define MSDC_INTEN_CSTA BIT(11) /* RW */
179#define MSDC_INTEN_XFER_COMPL BIT(12) /* RW */
180#define MSDC_INTEN_DXFER_DONE BIT(13) /* RW */
181#define MSDC_INTEN_DATTMO BIT(14) /* RW */
182#define MSDC_INTEN_DATCRCERR BIT(15) /* RW */
183#define MSDC_INTEN_ACMD19_DONE BIT(16) /* RW */
184#define MSDC_INTEN_DMA_BDCSERR BIT(17) /* RW */
185#define MSDC_INTEN_DMA_GPDCSERR BIT(18) /* RW */
186#define MSDC_INTEN_DMA_PROTECT BIT(19) /* RW */
187
188/* MSDC_FIFOCS mask */
189#define MSDC_FIFOCS_RXCNT GENMASK(7, 0) /* R */
190#define MSDC_FIFOCS_TXCNT GENMASK(23, 16) /* R */
191#define MSDC_FIFOCS_CLR BIT(31) /* RW */
192
193/* SDC_CFG mask */
194#define SDC_CFG_SDIOINTWKUP BIT(0) /* RW */
195#define SDC_CFG_INSWKUP BIT(1) /* RW */
196#define SDC_CFG_WRDTOC GENMASK(14, 2) /* RW */
197#define SDC_CFG_BUSWIDTH GENMASK(17, 16) /* RW */
198#define SDC_CFG_SDIO BIT(19) /* RW */
199#define SDC_CFG_SDIOIDE BIT(20) /* RW */
200#define SDC_CFG_INTATGAP BIT(21) /* RW */
201#define SDC_CFG_DTOC GENMASK(31, 24) /* RW */
202
203/* SDC_STS mask */
204#define SDC_STS_SDCBUSY BIT(0) /* RW */
205#define SDC_STS_CMDBUSY BIT(1) /* RW */
206#define SDC_STS_SWR_COMPL BIT(31) /* RW */
207
208#define SDC_DAT1_IRQ_TRIGGER BIT(19) /* RW */
209/* SDC_ADV_CFG0 mask */
210#define SDC_RX_ENHANCE_EN BIT(20) /* RW */
211
212/* DMA_SA_H4BIT mask */
213#define DMA_ADDR_HIGH_4BIT GENMASK(3, 0) /* RW */
214
215/* MSDC_DMA_CTRL mask */
216#define MSDC_DMA_CTRL_START BIT(0) /* W */
217#define MSDC_DMA_CTRL_STOP BIT(1) /* W */
218#define MSDC_DMA_CTRL_RESUME BIT(2) /* W */
219#define MSDC_DMA_CTRL_MODE BIT(8) /* RW */
220#define MSDC_DMA_CTRL_LASTBUF BIT(10) /* RW */
221#define MSDC_DMA_CTRL_BRUSTSZ GENMASK(14, 12) /* RW */
222
223/* MSDC_DMA_CFG mask */
224#define MSDC_DMA_CFG_STS BIT(0) /* R */
225#define MSDC_DMA_CFG_DECSEN BIT(1) /* RW */
226#define MSDC_DMA_CFG_AHBHPROT2 BIT(9) /* RW */
227#define MSDC_DMA_CFG_ACTIVEEN BIT(13) /* RW */
228#define MSDC_DMA_CFG_CS12B16B BIT(16) /* RW */
229
230/* MSDC_PATCH_BIT mask */
231#define MSDC_PATCH_BIT_ODDSUPP BIT(1) /* RW */
232#define MSDC_INT_DAT_LATCH_CK_SEL GENMASK(9, 7)
233#define MSDC_CKGEN_MSDC_DLY_SEL GENMASK(14, 10)
234#define MSDC_PATCH_BIT_IODSSEL BIT(16) /* RW */
235#define MSDC_PATCH_BIT_IOINTSEL BIT(17) /* RW */
236#define MSDC_PATCH_BIT_BUSYDLY GENMASK(21, 18) /* RW */
237#define MSDC_PATCH_BIT_WDOD GENMASK(25, 22) /* RW */
238#define MSDC_PATCH_BIT_IDRTSEL BIT(26) /* RW */
239#define MSDC_PATCH_BIT_CMDFSEL BIT(27) /* RW */
240#define MSDC_PATCH_BIT_INTDLSEL BIT(28) /* RW */
241#define MSDC_PATCH_BIT_SPCPUSH BIT(29) /* RW */
242#define MSDC_PATCH_BIT_DECRCTMO BIT(30) /* RW */
243
244#define MSDC_PATCH_BIT1_CMDTA GENMASK(5, 3) /* RW */
245#define MSDC_PB1_BUSY_CHECK_SEL BIT(7) /* RW */
246#define MSDC_PATCH_BIT1_STOP_DLY GENMASK(11, 8) /* RW */
247
248#define MSDC_PATCH_BIT2_CFGRESP BIT(15) /* RW */
249#define MSDC_PATCH_BIT2_CFGCRCSTS BIT(28) /* RW */
250#define MSDC_PB2_SUPPORT_64G BIT(1) /* RW */
251#define MSDC_PB2_RESPWAIT GENMASK(3, 2) /* RW */
252#define MSDC_PB2_RESPSTSENSEL GENMASK(18, 16) /* RW */
253#define MSDC_PB2_CRCSTSENSEL GENMASK(31, 29) /* RW */
254
255#define MSDC_PAD_TUNE_DATWRDLY GENMASK(4, 0) /* RW */
256#define MSDC_PAD_TUNE_DATRRDLY GENMASK(12, 8) /* RW */
257#define MSDC_PAD_TUNE_CMDRDLY GENMASK(20, 16) /* RW */
258#define MSDC_PAD_TUNE_CMDRRDLY GENMASK(26, 22) /* RW */
259#define MSDC_PAD_TUNE_CLKTDLY GENMASK(31, 27) /* RW */
260#define MSDC_PAD_TUNE_RXDLYSEL BIT(15) /* RW */
261#define MSDC_PAD_TUNE_RD_SEL BIT(13) /* RW */
262#define MSDC_PAD_TUNE_CMD_SEL BIT(21) /* RW */
263
264#define PAD_DS_TUNE_DLY_SEL BIT(0) /* RW */
265#define PAD_DS_TUNE_DLY1 GENMASK(6, 2) /* RW */
266#define PAD_DS_TUNE_DLY2 GENMASK(11, 7) /* RW */
267#define PAD_DS_TUNE_DLY3 GENMASK(16, 12) /* RW */
268
269#define PAD_CMD_TUNE_RX_DLY3 GENMASK(5, 1) /* RW */
270
271/* EMMC51_CFG0 mask */
272#define CMDQ_RDAT_CNT GENMASK(21, 12) /* RW */
273
274#define EMMC50_CFG_PADCMD_LATCHCK BIT(0) /* RW */
275#define EMMC50_CFG_CRCSTS_EDGE BIT(3) /* RW */
276#define EMMC50_CFG_CFCSTS_SEL BIT(4) /* RW */
277#define EMMC50_CFG_CMD_RESP_SEL BIT(9) /* RW */
278
279/* EMMC50_CFG1 mask */
280#define EMMC50_CFG1_DS_CFG BIT(28) /* RW */
281
282#define EMMC50_CFG3_OUTS_WR GENMASK(4, 0) /* RW */
283
284#define SDC_FIFO_CFG_WRVALIDSEL BIT(24) /* RW */
285#define SDC_FIFO_CFG_RDVALIDSEL BIT(25) /* RW */
286
287/* CQHCI_SETTING */
288#define CQHCI_RD_CMD_WND_SEL BIT(14) /* RW */
289#define CQHCI_WR_CMD_WND_SEL BIT(15) /* RW */
290
291/* EMMC_TOP_CONTROL mask */
292#define PAD_RXDLY_SEL BIT(0) /* RW */
293#define DELAY_EN BIT(1) /* RW */
294#define PAD_DAT_RD_RXDLY2 GENMASK(6, 2) /* RW */
295#define PAD_DAT_RD_RXDLY GENMASK(11, 7) /* RW */
296#define PAD_DAT_RD_RXDLY2_SEL BIT(12) /* RW */
297#define PAD_DAT_RD_RXDLY_SEL BIT(13) /* RW */
298#define DATA_K_VALUE_SEL BIT(14) /* RW */
299#define SDC_RX_ENH_EN BIT(15) /* TW */
300
301/* EMMC_TOP_CMD mask */
302#define PAD_CMD_RXDLY2 GENMASK(4, 0) /* RW */
303#define PAD_CMD_RXDLY GENMASK(9, 5) /* RW */
304#define PAD_CMD_RD_RXDLY2_SEL BIT(10) /* RW */
305#define PAD_CMD_RD_RXDLY_SEL BIT(11) /* RW */
306#define PAD_CMD_TX_DLY GENMASK(16, 12) /* RW */
307
308/* EMMC50_PAD_DS_TUNE mask */
309#define PAD_DS_DLY_SEL BIT(16) /* RW */
310#define PAD_DS_DLY1 GENMASK(14, 10) /* RW */
311#define PAD_DS_DLY3 GENMASK(4, 0) /* RW */
312
313#define REQ_CMD_EIO BIT(0)
314#define REQ_CMD_TMO BIT(1)
315#define REQ_DAT_ERR BIT(2)
316#define REQ_STOP_EIO BIT(3)
317#define REQ_STOP_TMO BIT(4)
318#define REQ_CMD_BUSY BIT(5)
319
320#define MSDC_PREPARE_FLAG BIT(0)
321#define MSDC_ASYNC_FLAG BIT(1)
322#define MSDC_MMAP_FLAG BIT(2)
323
324#define MTK_MMC_AUTOSUSPEND_DELAY 50
325#define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */
326#define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */
327
328#define DEFAULT_DEBOUNCE (8) /* 8 cycles CD debounce */
329
330#define PAD_DELAY_MAX 32 /* PAD delay cells */
331/*--------------------------------------------------------------------------*/
332/* Descriptor Structure */
333/*--------------------------------------------------------------------------*/
334struct mt_gpdma_desc {
335 u32 gpd_info;
336#define GPDMA_DESC_HWO BIT(0)
337#define GPDMA_DESC_BDP BIT(1)
338#define GPDMA_DESC_CHECKSUM GENMASK(15, 8)
339#define GPDMA_DESC_INT BIT(16)
340#define GPDMA_DESC_NEXT_H4 GENMASK(27, 24)
341#define GPDMA_DESC_PTR_H4 GENMASK(31, 28)
342 u32 next;
343 u32 ptr;
344 u32 gpd_data_len;
345#define GPDMA_DESC_BUFLEN GENMASK(15, 0)
346#define GPDMA_DESC_EXTLEN GENMASK(23, 16)
347 u32 arg;
348 u32 blknum;
349 u32 cmd;
350};
351
352struct mt_bdma_desc {
353 u32 bd_info;
354#define BDMA_DESC_EOL BIT(0)
355#define BDMA_DESC_CHECKSUM GENMASK(15, 8)
356#define BDMA_DESC_BLKPAD BIT(17)
357#define BDMA_DESC_DWPAD BIT(18)
358#define BDMA_DESC_NEXT_H4 GENMASK(27, 24)
359#define BDMA_DESC_PTR_H4 GENMASK(31, 28)
360 u32 next;
361 u32 ptr;
362 u32 bd_data_len;
363#define BDMA_DESC_BUFLEN GENMASK(15, 0)
364#define BDMA_DESC_BUFLEN_EXT GENMASK(23, 0)
365};
366
367struct msdc_dma {
368 struct scatterlist *sg; /* I/O scatter list */
369 struct mt_gpdma_desc *gpd; /* pointer to gpd array */
370 struct mt_bdma_desc *bd; /* pointer to bd array */
371 dma_addr_t gpd_addr; /* the physical address of gpd array */
372 dma_addr_t bd_addr; /* the physical address of bd array */
373};
374
375struct msdc_save_para {
376 u32 msdc_cfg;
377 u32 iocon;
378 u32 sdc_cfg;
379 u32 pad_tune;
380 u32 patch_bit0;
381 u32 patch_bit1;
382 u32 patch_bit2;
383 u32 pad_ds_tune;
384 u32 pad_cmd_tune;
385 u32 emmc50_cfg0;
386 u32 emmc50_cfg3;
387 u32 sdc_fifo_cfg;
388 u32 emmc_top_control;
389 u32 emmc_top_cmd;
390 u32 emmc50_pad_ds_tune;
391};
392
393struct mtk_mmc_compatible {
394 u8 clk_div_bits;
395 bool recheck_sdio_irq;
396 bool hs400_tune; /* only used for MT8173 */
397 u32 pad_tune_reg;
398 bool async_fifo;
399 bool data_tune;
400 bool busy_check;
401 bool stop_clk_fix;
402 bool enhance_rx;
403 bool support_64g;
404 bool use_internal_cd;
405};
406
407struct msdc_tune_para {
408 u32 iocon;
409 u32 pad_tune;
410 u32 pad_cmd_tune;
411 u32 emmc_top_control;
412 u32 emmc_top_cmd;
413};
414
415struct msdc_delay_phase {
416 u8 maxlen;
417 u8 start;
418 u8 final_phase;
419};
420
421struct msdc_host {
422 struct device *dev;
423 const struct mtk_mmc_compatible *dev_comp;
424 int cmd_rsp;
425
426 spinlock_t lock;
427 struct mmc_request *mrq;
428 struct mmc_command *cmd;
429 struct mmc_data *data;
430 int error;
431
432 void __iomem *base; /* host base address */
433 void __iomem *top_base; /* host top register base address */
434
435 struct msdc_dma dma; /* dma channel */
436 u64 dma_mask;
437
438 u32 timeout_ns; /* data timeout ns */
439 u32 timeout_clks; /* data timeout clks */
440
441 struct pinctrl *pinctrl;
442 struct pinctrl_state *pins_default;
443 struct pinctrl_state *pins_uhs;
444 struct pinctrl_state *pins_eint;
445 struct delayed_work req_timeout;
446 int irq; /* host interrupt */
447 int eint_irq; /* interrupt from sdio device for waking up system */
448 struct reset_control *reset;
449
450 struct clk *src_clk; /* msdc source clock */
451 struct clk *h_clk; /* msdc h_clk */
452 struct clk *bus_clk; /* bus clock which used to access register */
453 struct clk *src_clk_cg; /* msdc source clock control gate */
454 struct clk *sys_clk_cg; /* msdc subsys clock control gate */
455 struct clk *crypto_clk; /* msdc crypto clock control gate */
456 struct clk_bulk_data bulk_clks[MSDC_NR_CLOCKS];
457 u32 mclk; /* mmc subsystem clock frequency */
458 u32 src_clk_freq; /* source clock frequency */
459 unsigned char timing;
460 bool vqmmc_enabled;
461 u32 latch_ck;
462 u32 hs400_ds_delay;
463 u32 hs400_ds_dly3;
464 u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */
465 u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */
466 bool hs400_cmd_resp_sel_rising;
467 /* cmd response sample selection for HS400 */
468 bool hs400_mode; /* current eMMC will run at hs400 mode */
469 bool hs400_tuning; /* hs400 mode online tuning */
470 bool internal_cd; /* Use internal card-detect logic */
471 bool cqhci; /* support eMMC hw cmdq */
472 struct msdc_save_para save_para; /* used when gate HCLK */
473 struct msdc_tune_para def_tune_para; /* default tune setting */
474 struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
475 struct cqhci_host *cq_host;
476};
477
478static const struct mtk_mmc_compatible mt2701_compat = {
479 .clk_div_bits = 12,
480 .recheck_sdio_irq = true,
481 .hs400_tune = false,
482 .pad_tune_reg = MSDC_PAD_TUNE0,
483 .async_fifo = true,
484 .data_tune = true,
485 .busy_check = false,
486 .stop_clk_fix = false,
487 .enhance_rx = false,
488 .support_64g = false,
489};
490
491static const struct mtk_mmc_compatible mt2712_compat = {
492 .clk_div_bits = 12,
493 .recheck_sdio_irq = false,
494 .hs400_tune = false,
495 .pad_tune_reg = MSDC_PAD_TUNE0,
496 .async_fifo = true,
497 .data_tune = true,
498 .busy_check = true,
499 .stop_clk_fix = true,
500 .enhance_rx = true,
501 .support_64g = true,
502};
503
504static const struct mtk_mmc_compatible mt6779_compat = {
505 .clk_div_bits = 12,
506 .recheck_sdio_irq = false,
507 .hs400_tune = false,
508 .pad_tune_reg = MSDC_PAD_TUNE0,
509 .async_fifo = true,
510 .data_tune = true,
511 .busy_check = true,
512 .stop_clk_fix = true,
513 .enhance_rx = true,
514 .support_64g = true,
515};
516
517static const struct mtk_mmc_compatible mt6795_compat = {
518 .clk_div_bits = 8,
519 .recheck_sdio_irq = false,
520 .hs400_tune = true,
521 .pad_tune_reg = MSDC_PAD_TUNE,
522 .async_fifo = false,
523 .data_tune = false,
524 .busy_check = false,
525 .stop_clk_fix = false,
526 .enhance_rx = false,
527 .support_64g = false,
528};
529
530static const struct mtk_mmc_compatible mt7620_compat = {
531 .clk_div_bits = 8,
532 .recheck_sdio_irq = true,
533 .hs400_tune = false,
534 .pad_tune_reg = MSDC_PAD_TUNE,
535 .async_fifo = false,
536 .data_tune = false,
537 .busy_check = false,
538 .stop_clk_fix = false,
539 .enhance_rx = false,
540 .use_internal_cd = true,
541};
542
543static const struct mtk_mmc_compatible mt7622_compat = {
544 .clk_div_bits = 12,
545 .recheck_sdio_irq = true,
546 .hs400_tune = false,
547 .pad_tune_reg = MSDC_PAD_TUNE0,
548 .async_fifo = true,
549 .data_tune = true,
550 .busy_check = true,
551 .stop_clk_fix = true,
552 .enhance_rx = true,
553 .support_64g = false,
554};
555
556static const struct mtk_mmc_compatible mt7986_compat = {
557 .clk_div_bits = 12,
558 .recheck_sdio_irq = true,
559 .hs400_tune = false,
560 .pad_tune_reg = MSDC_PAD_TUNE0,
561 .async_fifo = true,
562 .data_tune = true,
563 .busy_check = true,
564 .stop_clk_fix = true,
565 .enhance_rx = true,
566 .support_64g = true,
567};
568
569static const struct mtk_mmc_compatible mt8135_compat = {
570 .clk_div_bits = 8,
571 .recheck_sdio_irq = true,
572 .hs400_tune = false,
573 .pad_tune_reg = MSDC_PAD_TUNE,
574 .async_fifo = false,
575 .data_tune = false,
576 .busy_check = false,
577 .stop_clk_fix = false,
578 .enhance_rx = false,
579 .support_64g = false,
580};
581
582static const struct mtk_mmc_compatible mt8173_compat = {
583 .clk_div_bits = 8,
584 .recheck_sdio_irq = true,
585 .hs400_tune = true,
586 .pad_tune_reg = MSDC_PAD_TUNE,
587 .async_fifo = false,
588 .data_tune = false,
589 .busy_check = false,
590 .stop_clk_fix = false,
591 .enhance_rx = false,
592 .support_64g = false,
593};
594
595static const struct mtk_mmc_compatible mt8183_compat = {
596 .clk_div_bits = 12,
597 .recheck_sdio_irq = false,
598 .hs400_tune = false,
599 .pad_tune_reg = MSDC_PAD_TUNE0,
600 .async_fifo = true,
601 .data_tune = true,
602 .busy_check = true,
603 .stop_clk_fix = true,
604 .enhance_rx = true,
605 .support_64g = true,
606};
607
608static const struct mtk_mmc_compatible mt8516_compat = {
609 .clk_div_bits = 12,
610 .recheck_sdio_irq = true,
611 .hs400_tune = false,
612 .pad_tune_reg = MSDC_PAD_TUNE0,
613 .async_fifo = true,
614 .data_tune = true,
615 .busy_check = true,
616 .stop_clk_fix = true,
617};
618
619static const struct of_device_id msdc_of_ids[] = {
620 { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
621 { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
622 { .compatible = "mediatek,mt6779-mmc", .data = &mt6779_compat},
623 { .compatible = "mediatek,mt6795-mmc", .data = &mt6795_compat},
624 { .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
625 { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
626 { .compatible = "mediatek,mt7986-mmc", .data = &mt7986_compat},
627 { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
628 { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
629 { .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
630 { .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
631
632 {}
633};
634MODULE_DEVICE_TABLE(of, msdc_of_ids);
635
636static void sdr_set_bits(void __iomem *reg, u32 bs)
637{
638 u32 val = readl(reg);
639
640 val |= bs;
641 writel(val, reg);
642}
643
644static void sdr_clr_bits(void __iomem *reg, u32 bs)
645{
646 u32 val = readl(reg);
647
648 val &= ~bs;
649 writel(val, reg);
650}
651
652static void sdr_set_field(void __iomem *reg, u32 field, u32 val)
653{
654 unsigned int tv = readl(reg);
655
656 tv &= ~field;
657 tv |= ((val) << (ffs((unsigned int)field) - 1));
658 writel(tv, reg);
659}
660
661static void sdr_get_field(void __iomem *reg, u32 field, u32 *val)
662{
663 unsigned int tv = readl(reg);
664
665 *val = ((tv & field) >> (ffs((unsigned int)field) - 1));
666}
667
668static void msdc_reset_hw(struct msdc_host *host)
669{
670 u32 val;
671
672 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
673 readl_poll_timeout(host->base + MSDC_CFG, val, !(val & MSDC_CFG_RST), 0, 0);
674
675 sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
676 readl_poll_timeout(host->base + MSDC_FIFOCS, val,
677 !(val & MSDC_FIFOCS_CLR), 0, 0);
678
679 val = readl(host->base + MSDC_INT);
680 writel(val, host->base + MSDC_INT);
681}
682
683static void msdc_cmd_next(struct msdc_host *host,
684 struct mmc_request *mrq, struct mmc_command *cmd);
685static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb);
686
687static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR |
688 MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY |
689 MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO;
690static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO |
691 MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR |
692 MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT;
693
694static u8 msdc_dma_calcs(u8 *buf, u32 len)
695{
696 u32 i, sum = 0;
697
698 for (i = 0; i < len; i++)
699 sum += buf[i];
700 return 0xff - (u8) sum;
701}
702
703static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
704 struct mmc_data *data)
705{
706 unsigned int j, dma_len;
707 dma_addr_t dma_address;
708 u32 dma_ctrl;
709 struct scatterlist *sg;
710 struct mt_gpdma_desc *gpd;
711 struct mt_bdma_desc *bd;
712
713 sg = data->sg;
714
715 gpd = dma->gpd;
716 bd = dma->bd;
717
718 /* modify gpd */
719 gpd->gpd_info |= GPDMA_DESC_HWO;
720 gpd->gpd_info |= GPDMA_DESC_BDP;
721 /* need to clear first. use these bits to calc checksum */
722 gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM;
723 gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8;
724
725 /* modify bd */
726 for_each_sg(data->sg, sg, data->sg_count, j) {
727 dma_address = sg_dma_address(sg);
728 dma_len = sg_dma_len(sg);
729
730 /* init bd */
731 bd[j].bd_info &= ~BDMA_DESC_BLKPAD;
732 bd[j].bd_info &= ~BDMA_DESC_DWPAD;
733 bd[j].ptr = lower_32_bits(dma_address);
734 if (host->dev_comp->support_64g) {
735 bd[j].bd_info &= ~BDMA_DESC_PTR_H4;
736 bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf)
737 << 28;
738 }
739
740 if (host->dev_comp->support_64g) {
741 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN_EXT;
742 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN_EXT);
743 } else {
744 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
745 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN);
746 }
747
748 if (j == data->sg_count - 1) /* the last bd */
749 bd[j].bd_info |= BDMA_DESC_EOL;
750 else
751 bd[j].bd_info &= ~BDMA_DESC_EOL;
752
753 /* checksum need to clear first */
754 bd[j].bd_info &= ~BDMA_DESC_CHECKSUM;
755 bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8;
756 }
757
758 sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
759 dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL);
760 dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE);
761 dma_ctrl |= (MSDC_BURST_64B << 12 | BIT(8));
762 writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL);
763 if (host->dev_comp->support_64g)
764 sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT,
765 upper_32_bits(dma->gpd_addr) & 0xf);
766 writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA);
767}
768
769static void msdc_prepare_data(struct msdc_host *host, struct mmc_data *data)
770{
771 if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
772 data->host_cookie |= MSDC_PREPARE_FLAG;
773 data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len,
774 mmc_get_dma_dir(data));
775 }
776}
777
778static void msdc_unprepare_data(struct msdc_host *host, struct mmc_data *data)
779{
780 if (data->host_cookie & MSDC_ASYNC_FLAG)
781 return;
782
783 if (data->host_cookie & MSDC_PREPARE_FLAG) {
784 dma_unmap_sg(host->dev, data->sg, data->sg_len,
785 mmc_get_dma_dir(data));
786 data->host_cookie &= ~MSDC_PREPARE_FLAG;
787 }
788}
789
790static u64 msdc_timeout_cal(struct msdc_host *host, u64 ns, u64 clks)
791{
792 struct mmc_host *mmc = mmc_from_priv(host);
793 u64 timeout, clk_ns;
794 u32 mode = 0;
795
796 if (mmc->actual_clock == 0) {
797 timeout = 0;
798 } else {
799 clk_ns = 1000000000ULL;
800 do_div(clk_ns, mmc->actual_clock);
801 timeout = ns + clk_ns - 1;
802 do_div(timeout, clk_ns);
803 timeout += clks;
804 /* in 1048576 sclk cycle unit */
805 timeout = DIV_ROUND_UP(timeout, BIT(20));
806 if (host->dev_comp->clk_div_bits == 8)
807 sdr_get_field(host->base + MSDC_CFG,
808 MSDC_CFG_CKMOD, &mode);
809 else
810 sdr_get_field(host->base + MSDC_CFG,
811 MSDC_CFG_CKMOD_EXTRA, &mode);
812 /*DDR mode will double the clk cycles for data timeout */
813 timeout = mode >= 2 ? timeout * 2 : timeout;
814 timeout = timeout > 1 ? timeout - 1 : 0;
815 }
816 return timeout;
817}
818
819/* clock control primitives */
820static void msdc_set_timeout(struct msdc_host *host, u64 ns, u64 clks)
821{
822 u64 timeout;
823
824 host->timeout_ns = ns;
825 host->timeout_clks = clks;
826
827 timeout = msdc_timeout_cal(host, ns, clks);
828 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC,
829 (u32)(timeout > 255 ? 255 : timeout));
830}
831
832static void msdc_set_busy_timeout(struct msdc_host *host, u64 ns, u64 clks)
833{
834 u64 timeout;
835
836 timeout = msdc_timeout_cal(host, ns, clks);
837 sdr_set_field(host->base + SDC_CFG, SDC_CFG_WRDTOC,
838 (u32)(timeout > 8191 ? 8191 : timeout));
839}
840
841static void msdc_gate_clock(struct msdc_host *host)
842{
843 clk_bulk_disable_unprepare(MSDC_NR_CLOCKS, host->bulk_clks);
844 clk_disable_unprepare(host->crypto_clk);
845 clk_disable_unprepare(host->src_clk_cg);
846 clk_disable_unprepare(host->src_clk);
847 clk_disable_unprepare(host->bus_clk);
848 clk_disable_unprepare(host->h_clk);
849}
850
851static int msdc_ungate_clock(struct msdc_host *host)
852{
853 u32 val;
854 int ret;
855
856 clk_prepare_enable(host->h_clk);
857 clk_prepare_enable(host->bus_clk);
858 clk_prepare_enable(host->src_clk);
859 clk_prepare_enable(host->src_clk_cg);
860 clk_prepare_enable(host->crypto_clk);
861 ret = clk_bulk_prepare_enable(MSDC_NR_CLOCKS, host->bulk_clks);
862 if (ret) {
863 dev_err(host->dev, "Cannot enable pclk/axi/ahb clock gates\n");
864 return ret;
865 }
866
867 return readl_poll_timeout(host->base + MSDC_CFG, val,
868 (val & MSDC_CFG_CKSTB), 1, 20000);
869}
870
871static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
872{
873 struct mmc_host *mmc = mmc_from_priv(host);
874 u32 mode;
875 u32 flags;
876 u32 div;
877 u32 sclk;
878 u32 tune_reg = host->dev_comp->pad_tune_reg;
879 u32 val;
880
881 if (!hz) {
882 dev_dbg(host->dev, "set mclk to 0\n");
883 host->mclk = 0;
884 mmc->actual_clock = 0;
885 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
886 return;
887 }
888
889 flags = readl(host->base + MSDC_INTEN);
890 sdr_clr_bits(host->base + MSDC_INTEN, flags);
891 if (host->dev_comp->clk_div_bits == 8)
892 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE);
893 else
894 sdr_clr_bits(host->base + MSDC_CFG,
895 MSDC_CFG_HS400_CK_MODE_EXTRA);
896 if (timing == MMC_TIMING_UHS_DDR50 ||
897 timing == MMC_TIMING_MMC_DDR52 ||
898 timing == MMC_TIMING_MMC_HS400) {
899 if (timing == MMC_TIMING_MMC_HS400)
900 mode = 0x3;
901 else
902 mode = 0x2; /* ddr mode and use divisor */
903
904 if (hz >= (host->src_clk_freq >> 2)) {
905 div = 0; /* mean div = 1/4 */
906 sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */
907 } else {
908 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
909 sclk = (host->src_clk_freq >> 2) / div;
910 div = (div >> 1);
911 }
912
913 if (timing == MMC_TIMING_MMC_HS400 &&
914 hz >= (host->src_clk_freq >> 1)) {
915 if (host->dev_comp->clk_div_bits == 8)
916 sdr_set_bits(host->base + MSDC_CFG,
917 MSDC_CFG_HS400_CK_MODE);
918 else
919 sdr_set_bits(host->base + MSDC_CFG,
920 MSDC_CFG_HS400_CK_MODE_EXTRA);
921 sclk = host->src_clk_freq >> 1;
922 div = 0; /* div is ignore when bit18 is set */
923 }
924 } else if (hz >= host->src_clk_freq) {
925 mode = 0x1; /* no divisor */
926 div = 0;
927 sclk = host->src_clk_freq;
928 } else {
929 mode = 0x0; /* use divisor */
930 if (hz >= (host->src_clk_freq >> 1)) {
931 div = 0; /* mean div = 1/2 */
932 sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */
933 } else {
934 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
935 sclk = (host->src_clk_freq >> 2) / div;
936 }
937 }
938 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
939
940 clk_disable_unprepare(host->src_clk_cg);
941 if (host->dev_comp->clk_div_bits == 8)
942 sdr_set_field(host->base + MSDC_CFG,
943 MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
944 (mode << 8) | div);
945 else
946 sdr_set_field(host->base + MSDC_CFG,
947 MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA,
948 (mode << 12) | div);
949
950 clk_prepare_enable(host->src_clk_cg);
951 readl_poll_timeout(host->base + MSDC_CFG, val, (val & MSDC_CFG_CKSTB), 0, 0);
952 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
953 mmc->actual_clock = sclk;
954 host->mclk = hz;
955 host->timing = timing;
956 /* need because clk changed. */
957 msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
958 sdr_set_bits(host->base + MSDC_INTEN, flags);
959
960 /*
961 * mmc_select_hs400() will drop to 50Mhz and High speed mode,
962 * tune result of hs200/200Mhz is not suitable for 50Mhz
963 */
964 if (mmc->actual_clock <= 52000000) {
965 writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
966 if (host->top_base) {
967 writel(host->def_tune_para.emmc_top_control,
968 host->top_base + EMMC_TOP_CONTROL);
969 writel(host->def_tune_para.emmc_top_cmd,
970 host->top_base + EMMC_TOP_CMD);
971 } else {
972 writel(host->def_tune_para.pad_tune,
973 host->base + tune_reg);
974 }
975 } else {
976 writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
977 writel(host->saved_tune_para.pad_cmd_tune,
978 host->base + PAD_CMD_TUNE);
979 if (host->top_base) {
980 writel(host->saved_tune_para.emmc_top_control,
981 host->top_base + EMMC_TOP_CONTROL);
982 writel(host->saved_tune_para.emmc_top_cmd,
983 host->top_base + EMMC_TOP_CMD);
984 } else {
985 writel(host->saved_tune_para.pad_tune,
986 host->base + tune_reg);
987 }
988 }
989
990 if (timing == MMC_TIMING_MMC_HS400 &&
991 host->dev_comp->hs400_tune)
992 sdr_set_field(host->base + tune_reg,
993 MSDC_PAD_TUNE_CMDRRDLY,
994 host->hs400_cmd_int_delay);
995 dev_dbg(host->dev, "sclk: %d, timing: %d\n", mmc->actual_clock,
996 timing);
997}
998
999static inline u32 msdc_cmd_find_resp(struct msdc_host *host,
1000 struct mmc_command *cmd)
1001{
1002 u32 resp;
1003
1004 switch (mmc_resp_type(cmd)) {
1005 /* Actually, R1, R5, R6, R7 are the same */
1006 case MMC_RSP_R1:
1007 resp = 0x1;
1008 break;
1009 case MMC_RSP_R1B:
1010 resp = 0x7;
1011 break;
1012 case MMC_RSP_R2:
1013 resp = 0x2;
1014 break;
1015 case MMC_RSP_R3:
1016 resp = 0x3;
1017 break;
1018 case MMC_RSP_NONE:
1019 default:
1020 resp = 0x0;
1021 break;
1022 }
1023
1024 return resp;
1025}
1026
1027static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
1028 struct mmc_request *mrq, struct mmc_command *cmd)
1029{
1030 struct mmc_host *mmc = mmc_from_priv(host);
1031 /* rawcmd :
1032 * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
1033 * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
1034 */
1035 u32 opcode = cmd->opcode;
1036 u32 resp = msdc_cmd_find_resp(host, cmd);
1037 u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7);
1038
1039 host->cmd_rsp = resp;
1040
1041 if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) ||
1042 opcode == MMC_STOP_TRANSMISSION)
1043 rawcmd |= BIT(14);
1044 else if (opcode == SD_SWITCH_VOLTAGE)
1045 rawcmd |= BIT(30);
1046 else if (opcode == SD_APP_SEND_SCR ||
1047 opcode == SD_APP_SEND_NUM_WR_BLKS ||
1048 (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
1049 (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
1050 (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC))
1051 rawcmd |= BIT(11);
1052
1053 if (cmd->data) {
1054 struct mmc_data *data = cmd->data;
1055
1056 if (mmc_op_multi(opcode)) {
1057 if (mmc_card_mmc(mmc->card) && mrq->sbc &&
1058 !(mrq->sbc->arg & 0xFFFF0000))
1059 rawcmd |= BIT(29); /* AutoCMD23 */
1060 }
1061
1062 rawcmd |= ((data->blksz & 0xFFF) << 16);
1063 if (data->flags & MMC_DATA_WRITE)
1064 rawcmd |= BIT(13);
1065 if (data->blocks > 1)
1066 rawcmd |= BIT(12);
1067 else
1068 rawcmd |= BIT(11);
1069 /* Always use dma mode */
1070 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO);
1071
1072 if (host->timeout_ns != data->timeout_ns ||
1073 host->timeout_clks != data->timeout_clks)
1074 msdc_set_timeout(host, data->timeout_ns,
1075 data->timeout_clks);
1076
1077 writel(data->blocks, host->base + SDC_BLK_NUM);
1078 }
1079 return rawcmd;
1080}
1081
1082static void msdc_start_data(struct msdc_host *host, struct mmc_command *cmd,
1083 struct mmc_data *data)
1084{
1085 bool read;
1086
1087 WARN_ON(host->data);
1088 host->data = data;
1089 read = data->flags & MMC_DATA_READ;
1090
1091 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1092 msdc_dma_setup(host, &host->dma, data);
1093 sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask);
1094 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
1095 dev_dbg(host->dev, "DMA start\n");
1096 dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n",
1097 __func__, cmd->opcode, data->blocks, read);
1098}
1099
1100static int msdc_auto_cmd_done(struct msdc_host *host, int events,
1101 struct mmc_command *cmd)
1102{
1103 u32 *rsp = cmd->resp;
1104
1105 rsp[0] = readl(host->base + SDC_ACMD_RESP);
1106
1107 if (events & MSDC_INT_ACMDRDY) {
1108 cmd->error = 0;
1109 } else {
1110 msdc_reset_hw(host);
1111 if (events & MSDC_INT_ACMDCRCERR) {
1112 cmd->error = -EILSEQ;
1113 host->error |= REQ_STOP_EIO;
1114 } else if (events & MSDC_INT_ACMDTMO) {
1115 cmd->error = -ETIMEDOUT;
1116 host->error |= REQ_STOP_TMO;
1117 }
1118 dev_err(host->dev,
1119 "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n",
1120 __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error);
1121 }
1122 return cmd->error;
1123}
1124
1125/*
1126 * msdc_recheck_sdio_irq - recheck whether the SDIO irq is lost
1127 *
1128 * Host controller may lost interrupt in some special case.
1129 * Add SDIO irq recheck mechanism to make sure all interrupts
1130 * can be processed immediately
1131 */
1132static void msdc_recheck_sdio_irq(struct msdc_host *host)
1133{
1134 struct mmc_host *mmc = mmc_from_priv(host);
1135 u32 reg_int, reg_inten, reg_ps;
1136
1137 if (mmc->caps & MMC_CAP_SDIO_IRQ) {
1138 reg_inten = readl(host->base + MSDC_INTEN);
1139 if (reg_inten & MSDC_INTEN_SDIOIRQ) {
1140 reg_int = readl(host->base + MSDC_INT);
1141 reg_ps = readl(host->base + MSDC_PS);
1142 if (!(reg_int & MSDC_INT_SDIOIRQ ||
1143 reg_ps & MSDC_PS_DATA1)) {
1144 __msdc_enable_sdio_irq(host, 0);
1145 sdio_signal_irq(mmc);
1146 }
1147 }
1148 }
1149}
1150
1151static void msdc_track_cmd_data(struct msdc_host *host, struct mmc_command *cmd)
1152{
1153 if (host->error)
1154 dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n",
1155 __func__, cmd->opcode, cmd->arg, host->error);
1156}
1157
1158static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
1159{
1160 unsigned long flags;
1161
1162 /*
1163 * No need check the return value of cancel_delayed_work, as only ONE
1164 * path will go here!
1165 */
1166 cancel_delayed_work(&host->req_timeout);
1167
1168 spin_lock_irqsave(&host->lock, flags);
1169 host->mrq = NULL;
1170 spin_unlock_irqrestore(&host->lock, flags);
1171
1172 msdc_track_cmd_data(host, mrq->cmd);
1173 if (mrq->data)
1174 msdc_unprepare_data(host, mrq->data);
1175 if (host->error)
1176 msdc_reset_hw(host);
1177 mmc_request_done(mmc_from_priv(host), mrq);
1178 if (host->dev_comp->recheck_sdio_irq)
1179 msdc_recheck_sdio_irq(host);
1180}
1181
1182/* returns true if command is fully handled; returns false otherwise */
1183static bool msdc_cmd_done(struct msdc_host *host, int events,
1184 struct mmc_request *mrq, struct mmc_command *cmd)
1185{
1186 bool done = false;
1187 bool sbc_error;
1188 unsigned long flags;
1189 u32 *rsp;
1190
1191 if (mrq->sbc && cmd == mrq->cmd &&
1192 (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR
1193 | MSDC_INT_ACMDTMO)))
1194 msdc_auto_cmd_done(host, events, mrq->sbc);
1195
1196 sbc_error = mrq->sbc && mrq->sbc->error;
1197
1198 if (!sbc_error && !(events & (MSDC_INT_CMDRDY
1199 | MSDC_INT_RSPCRCERR
1200 | MSDC_INT_CMDTMO)))
1201 return done;
1202
1203 spin_lock_irqsave(&host->lock, flags);
1204 done = !host->cmd;
1205 host->cmd = NULL;
1206 spin_unlock_irqrestore(&host->lock, flags);
1207
1208 if (done)
1209 return true;
1210 rsp = cmd->resp;
1211
1212 sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1213
1214 if (cmd->flags & MMC_RSP_PRESENT) {
1215 if (cmd->flags & MMC_RSP_136) {
1216 rsp[0] = readl(host->base + SDC_RESP3);
1217 rsp[1] = readl(host->base + SDC_RESP2);
1218 rsp[2] = readl(host->base + SDC_RESP1);
1219 rsp[3] = readl(host->base + SDC_RESP0);
1220 } else {
1221 rsp[0] = readl(host->base + SDC_RESP0);
1222 }
1223 }
1224
1225 if (!sbc_error && !(events & MSDC_INT_CMDRDY)) {
1226 if (events & MSDC_INT_CMDTMO ||
1227 (!mmc_op_tuning(cmd->opcode) && !host->hs400_tuning))
1228 /*
1229 * should not clear fifo/interrupt as the tune data
1230 * may have already come when cmd19/cmd21 gets response
1231 * CRC error.
1232 */
1233 msdc_reset_hw(host);
1234 if (events & MSDC_INT_RSPCRCERR) {
1235 cmd->error = -EILSEQ;
1236 host->error |= REQ_CMD_EIO;
1237 } else if (events & MSDC_INT_CMDTMO) {
1238 cmd->error = -ETIMEDOUT;
1239 host->error |= REQ_CMD_TMO;
1240 }
1241 }
1242 if (cmd->error)
1243 dev_dbg(host->dev,
1244 "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n",
1245 __func__, cmd->opcode, cmd->arg, rsp[0],
1246 cmd->error);
1247
1248 msdc_cmd_next(host, mrq, cmd);
1249 return true;
1250}
1251
1252/* It is the core layer's responsibility to ensure card status
1253 * is correct before issue a request. but host design do below
1254 * checks recommended.
1255 */
1256static inline bool msdc_cmd_is_ready(struct msdc_host *host,
1257 struct mmc_request *mrq, struct mmc_command *cmd)
1258{
1259 u32 val;
1260 int ret;
1261
1262 /* The max busy time we can endure is 20ms */
1263 ret = readl_poll_timeout_atomic(host->base + SDC_STS, val,
1264 !(val & SDC_STS_CMDBUSY), 1, 20000);
1265 if (ret) {
1266 dev_err(host->dev, "CMD bus busy detected\n");
1267 host->error |= REQ_CMD_BUSY;
1268 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1269 return false;
1270 }
1271
1272 if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
1273 /* R1B or with data, should check SDCBUSY */
1274 ret = readl_poll_timeout_atomic(host->base + SDC_STS, val,
1275 !(val & SDC_STS_SDCBUSY), 1, 20000);
1276 if (ret) {
1277 dev_err(host->dev, "Controller busy detected\n");
1278 host->error |= REQ_CMD_BUSY;
1279 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1280 return false;
1281 }
1282 }
1283 return true;
1284}
1285
1286static void msdc_start_command(struct msdc_host *host,
1287 struct mmc_request *mrq, struct mmc_command *cmd)
1288{
1289 u32 rawcmd;
1290 unsigned long flags;
1291
1292 WARN_ON(host->cmd);
1293 host->cmd = cmd;
1294
1295 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1296 if (!msdc_cmd_is_ready(host, mrq, cmd))
1297 return;
1298
1299 if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 ||
1300 readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) {
1301 dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n");
1302 msdc_reset_hw(host);
1303 }
1304
1305 cmd->error = 0;
1306 rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
1307
1308 spin_lock_irqsave(&host->lock, flags);
1309 sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1310 spin_unlock_irqrestore(&host->lock, flags);
1311
1312 writel(cmd->arg, host->base + SDC_ARG);
1313 writel(rawcmd, host->base + SDC_CMD);
1314}
1315
1316static void msdc_cmd_next(struct msdc_host *host,
1317 struct mmc_request *mrq, struct mmc_command *cmd)
1318{
1319 if ((cmd->error &&
1320 !(cmd->error == -EILSEQ &&
1321 (mmc_op_tuning(cmd->opcode) || host->hs400_tuning))) ||
1322 (mrq->sbc && mrq->sbc->error))
1323 msdc_request_done(host, mrq);
1324 else if (cmd == mrq->sbc)
1325 msdc_start_command(host, mrq, mrq->cmd);
1326 else if (!cmd->data)
1327 msdc_request_done(host, mrq);
1328 else
1329 msdc_start_data(host, cmd, cmd->data);
1330}
1331
1332static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
1333{
1334 struct msdc_host *host = mmc_priv(mmc);
1335
1336 host->error = 0;
1337 WARN_ON(host->mrq);
1338 host->mrq = mrq;
1339
1340 if (mrq->data)
1341 msdc_prepare_data(host, mrq->data);
1342
1343 /* if SBC is required, we have HW option and SW option.
1344 * if HW option is enabled, and SBC does not have "special" flags,
1345 * use HW option, otherwise use SW option
1346 */
1347 if (mrq->sbc && (!mmc_card_mmc(mmc->card) ||
1348 (mrq->sbc->arg & 0xFFFF0000)))
1349 msdc_start_command(host, mrq, mrq->sbc);
1350 else
1351 msdc_start_command(host, mrq, mrq->cmd);
1352}
1353
1354static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
1355{
1356 struct msdc_host *host = mmc_priv(mmc);
1357 struct mmc_data *data = mrq->data;
1358
1359 if (!data)
1360 return;
1361
1362 msdc_prepare_data(host, data);
1363 data->host_cookie |= MSDC_ASYNC_FLAG;
1364}
1365
1366static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1367 int err)
1368{
1369 struct msdc_host *host = mmc_priv(mmc);
1370 struct mmc_data *data = mrq->data;
1371
1372 if (!data)
1373 return;
1374
1375 if (data->host_cookie) {
1376 data->host_cookie &= ~MSDC_ASYNC_FLAG;
1377 msdc_unprepare_data(host, data);
1378 }
1379}
1380
1381static void msdc_data_xfer_next(struct msdc_host *host, struct mmc_request *mrq)
1382{
1383 if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error &&
1384 !mrq->sbc)
1385 msdc_start_command(host, mrq, mrq->stop);
1386 else
1387 msdc_request_done(host, mrq);
1388}
1389
1390static void msdc_data_xfer_done(struct msdc_host *host, u32 events,
1391 struct mmc_request *mrq, struct mmc_data *data)
1392{
1393 struct mmc_command *stop;
1394 unsigned long flags;
1395 bool done;
1396 unsigned int check_data = events &
1397 (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
1398 | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
1399 | MSDC_INT_DMA_PROTECT);
1400 u32 val;
1401 int ret;
1402
1403 spin_lock_irqsave(&host->lock, flags);
1404 done = !host->data;
1405 if (check_data)
1406 host->data = NULL;
1407 spin_unlock_irqrestore(&host->lock, flags);
1408
1409 if (done)
1410 return;
1411 stop = data->stop;
1412
1413 if (check_data || (stop && stop->error)) {
1414 dev_dbg(host->dev, "DMA status: 0x%8X\n",
1415 readl(host->base + MSDC_DMA_CFG));
1416 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
1417 1);
1418
1419 ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CTRL, val,
1420 !(val & MSDC_DMA_CTRL_STOP), 1, 20000);
1421 if (ret)
1422 dev_dbg(host->dev, "DMA stop timed out\n");
1423
1424 ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CFG, val,
1425 !(val & MSDC_DMA_CFG_STS), 1, 20000);
1426 if (ret)
1427 dev_dbg(host->dev, "DMA inactive timed out\n");
1428
1429 sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask);
1430 dev_dbg(host->dev, "DMA stop\n");
1431
1432 if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) {
1433 data->bytes_xfered = data->blocks * data->blksz;
1434 } else {
1435 dev_dbg(host->dev, "interrupt events: %x\n", events);
1436 msdc_reset_hw(host);
1437 host->error |= REQ_DAT_ERR;
1438 data->bytes_xfered = 0;
1439
1440 if (events & MSDC_INT_DATTMO)
1441 data->error = -ETIMEDOUT;
1442 else if (events & MSDC_INT_DATCRCERR)
1443 data->error = -EILSEQ;
1444
1445 dev_dbg(host->dev, "%s: cmd=%d; blocks=%d",
1446 __func__, mrq->cmd->opcode, data->blocks);
1447 dev_dbg(host->dev, "data_error=%d xfer_size=%d\n",
1448 (int)data->error, data->bytes_xfered);
1449 }
1450
1451 msdc_data_xfer_next(host, mrq);
1452 }
1453}
1454
1455static void msdc_set_buswidth(struct msdc_host *host, u32 width)
1456{
1457 u32 val = readl(host->base + SDC_CFG);
1458
1459 val &= ~SDC_CFG_BUSWIDTH;
1460
1461 switch (width) {
1462 default:
1463 case MMC_BUS_WIDTH_1:
1464 val |= (MSDC_BUS_1BITS << 16);
1465 break;
1466 case MMC_BUS_WIDTH_4:
1467 val |= (MSDC_BUS_4BITS << 16);
1468 break;
1469 case MMC_BUS_WIDTH_8:
1470 val |= (MSDC_BUS_8BITS << 16);
1471 break;
1472 }
1473
1474 writel(val, host->base + SDC_CFG);
1475 dev_dbg(host->dev, "Bus Width = %d", width);
1476}
1477
1478static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
1479{
1480 struct msdc_host *host = mmc_priv(mmc);
1481 int ret;
1482
1483 if (!IS_ERR(mmc->supply.vqmmc)) {
1484 if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 &&
1485 ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1486 dev_err(host->dev, "Unsupported signal voltage!\n");
1487 return -EINVAL;
1488 }
1489
1490 ret = mmc_regulator_set_vqmmc(mmc, ios);
1491 if (ret < 0) {
1492 dev_dbg(host->dev, "Regulator set error %d (%d)\n",
1493 ret, ios->signal_voltage);
1494 return ret;
1495 }
1496
1497 /* Apply different pinctrl settings for different signal voltage */
1498 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
1499 pinctrl_select_state(host->pinctrl, host->pins_uhs);
1500 else
1501 pinctrl_select_state(host->pinctrl, host->pins_default);
1502 }
1503 return 0;
1504}
1505
1506static int msdc_card_busy(struct mmc_host *mmc)
1507{
1508 struct msdc_host *host = mmc_priv(mmc);
1509 u32 status = readl(host->base + MSDC_PS);
1510
1511 /* only check if data0 is low */
1512 return !(status & BIT(16));
1513}
1514
1515static void msdc_request_timeout(struct work_struct *work)
1516{
1517 struct msdc_host *host = container_of(work, struct msdc_host,
1518 req_timeout.work);
1519
1520 /* simulate HW timeout status */
1521 dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__);
1522 if (host->mrq) {
1523 dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__,
1524 host->mrq, host->mrq->cmd->opcode);
1525 if (host->cmd) {
1526 dev_err(host->dev, "%s: aborting cmd=%d\n",
1527 __func__, host->cmd->opcode);
1528 msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq,
1529 host->cmd);
1530 } else if (host->data) {
1531 dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n",
1532 __func__, host->mrq->cmd->opcode,
1533 host->data->blocks);
1534 msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq,
1535 host->data);
1536 }
1537 }
1538}
1539
1540static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb)
1541{
1542 if (enb) {
1543 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1544 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1545 if (host->dev_comp->recheck_sdio_irq)
1546 msdc_recheck_sdio_irq(host);
1547 } else {
1548 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1549 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1550 }
1551}
1552
1553static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
1554{
1555 struct msdc_host *host = mmc_priv(mmc);
1556 unsigned long flags;
1557 int ret;
1558
1559 spin_lock_irqsave(&host->lock, flags);
1560 __msdc_enable_sdio_irq(host, enb);
1561 spin_unlock_irqrestore(&host->lock, flags);
1562
1563 if (mmc_card_enable_async_irq(mmc->card) && host->pins_eint) {
1564 if (enb) {
1565 /*
1566 * In dev_pm_set_dedicated_wake_irq_reverse(), eint pin will be set to
1567 * GPIO mode. We need to restore it to SDIO DAT1 mode after that.
1568 * Since the current pinstate is pins_uhs, to ensure pinctrl select take
1569 * affect successfully, we change the pinstate to pins_eint firstly.
1570 */
1571 pinctrl_select_state(host->pinctrl, host->pins_eint);
1572 ret = dev_pm_set_dedicated_wake_irq_reverse(host->dev, host->eint_irq);
1573
1574 if (ret) {
1575 dev_err(host->dev, "Failed to register SDIO wakeup irq!\n");
1576 host->pins_eint = NULL;
1577 pm_runtime_get_noresume(host->dev);
1578 } else {
1579 dev_dbg(host->dev, "SDIO eint irq: %d!\n", host->eint_irq);
1580 }
1581
1582 pinctrl_select_state(host->pinctrl, host->pins_uhs);
1583 } else {
1584 dev_pm_clear_wake_irq(host->dev);
1585 }
1586 } else {
1587 if (enb) {
1588 /* Ensure host->pins_eint is NULL */
1589 host->pins_eint = NULL;
1590 pm_runtime_get_noresume(host->dev);
1591 } else {
1592 pm_runtime_put_noidle(host->dev);
1593 }
1594 }
1595}
1596
1597static irqreturn_t msdc_cmdq_irq(struct msdc_host *host, u32 intsts)
1598{
1599 struct mmc_host *mmc = mmc_from_priv(host);
1600 int cmd_err = 0, dat_err = 0;
1601
1602 if (intsts & MSDC_INT_RSPCRCERR) {
1603 cmd_err = -EILSEQ;
1604 dev_err(host->dev, "%s: CMD CRC ERR", __func__);
1605 } else if (intsts & MSDC_INT_CMDTMO) {
1606 cmd_err = -ETIMEDOUT;
1607 dev_err(host->dev, "%s: CMD TIMEOUT ERR", __func__);
1608 }
1609
1610 if (intsts & MSDC_INT_DATCRCERR) {
1611 dat_err = -EILSEQ;
1612 dev_err(host->dev, "%s: DATA CRC ERR", __func__);
1613 } else if (intsts & MSDC_INT_DATTMO) {
1614 dat_err = -ETIMEDOUT;
1615 dev_err(host->dev, "%s: DATA TIMEOUT ERR", __func__);
1616 }
1617
1618 if (cmd_err || dat_err) {
1619 dev_err(host->dev, "cmd_err = %d, dat_err =%d, intsts = 0x%x",
1620 cmd_err, dat_err, intsts);
1621 }
1622
1623 return cqhci_irq(mmc, 0, cmd_err, dat_err);
1624}
1625
1626static irqreturn_t msdc_irq(int irq, void *dev_id)
1627{
1628 struct msdc_host *host = (struct msdc_host *) dev_id;
1629 struct mmc_host *mmc = mmc_from_priv(host);
1630
1631 while (true) {
1632 struct mmc_request *mrq;
1633 struct mmc_command *cmd;
1634 struct mmc_data *data;
1635 u32 events, event_mask;
1636
1637 spin_lock(&host->lock);
1638 events = readl(host->base + MSDC_INT);
1639 event_mask = readl(host->base + MSDC_INTEN);
1640 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
1641 __msdc_enable_sdio_irq(host, 0);
1642 /* clear interrupts */
1643 writel(events & event_mask, host->base + MSDC_INT);
1644
1645 mrq = host->mrq;
1646 cmd = host->cmd;
1647 data = host->data;
1648 spin_unlock(&host->lock);
1649
1650 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
1651 sdio_signal_irq(mmc);
1652
1653 if ((events & event_mask) & MSDC_INT_CDSC) {
1654 if (host->internal_cd)
1655 mmc_detect_change(mmc, msecs_to_jiffies(20));
1656 events &= ~MSDC_INT_CDSC;
1657 }
1658
1659 if (!(events & (event_mask & ~MSDC_INT_SDIOIRQ)))
1660 break;
1661
1662 if ((mmc->caps2 & MMC_CAP2_CQE) &&
1663 (events & MSDC_INT_CMDQ)) {
1664 msdc_cmdq_irq(host, events);
1665 /* clear interrupts */
1666 writel(events, host->base + MSDC_INT);
1667 return IRQ_HANDLED;
1668 }
1669
1670 if (!mrq) {
1671 dev_err(host->dev,
1672 "%s: MRQ=NULL; events=%08X; event_mask=%08X\n",
1673 __func__, events, event_mask);
1674 WARN_ON(1);
1675 break;
1676 }
1677
1678 dev_dbg(host->dev, "%s: events=%08X\n", __func__, events);
1679
1680 if (cmd)
1681 msdc_cmd_done(host, events, mrq, cmd);
1682 else if (data)
1683 msdc_data_xfer_done(host, events, mrq, data);
1684 }
1685
1686 return IRQ_HANDLED;
1687}
1688
1689static void msdc_init_hw(struct msdc_host *host)
1690{
1691 u32 val;
1692 u32 tune_reg = host->dev_comp->pad_tune_reg;
1693 struct mmc_host *mmc = mmc_from_priv(host);
1694
1695 if (host->reset) {
1696 reset_control_assert(host->reset);
1697 usleep_range(10, 50);
1698 reset_control_deassert(host->reset);
1699 }
1700
1701 /* Configure to MMC/SD mode, clock free running */
1702 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
1703
1704 /* Reset */
1705 msdc_reset_hw(host);
1706
1707 /* Disable and clear all interrupts */
1708 writel(0, host->base + MSDC_INTEN);
1709 val = readl(host->base + MSDC_INT);
1710 writel(val, host->base + MSDC_INT);
1711
1712 /* Configure card detection */
1713 if (host->internal_cd) {
1714 sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE,
1715 DEFAULT_DEBOUNCE);
1716 sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1717 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1718 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1719 } else {
1720 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1721 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1722 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1723 }
1724
1725 if (host->top_base) {
1726 writel(0, host->top_base + EMMC_TOP_CONTROL);
1727 writel(0, host->top_base + EMMC_TOP_CMD);
1728 } else {
1729 writel(0, host->base + tune_reg);
1730 }
1731 writel(0, host->base + MSDC_IOCON);
1732 sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0);
1733 writel(0x403c0046, host->base + MSDC_PATCH_BIT);
1734 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
1735 writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
1736 sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
1737
1738 if (host->dev_comp->stop_clk_fix) {
1739 sdr_set_field(host->base + MSDC_PATCH_BIT1,
1740 MSDC_PATCH_BIT1_STOP_DLY, 3);
1741 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1742 SDC_FIFO_CFG_WRVALIDSEL);
1743 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1744 SDC_FIFO_CFG_RDVALIDSEL);
1745 }
1746
1747 if (host->dev_comp->busy_check)
1748 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, BIT(7));
1749
1750 if (host->dev_comp->async_fifo) {
1751 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1752 MSDC_PB2_RESPWAIT, 3);
1753 if (host->dev_comp->enhance_rx) {
1754 if (host->top_base)
1755 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1756 SDC_RX_ENH_EN);
1757 else
1758 sdr_set_bits(host->base + SDC_ADV_CFG0,
1759 SDC_RX_ENHANCE_EN);
1760 } else {
1761 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1762 MSDC_PB2_RESPSTSENSEL, 2);
1763 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1764 MSDC_PB2_CRCSTSENSEL, 2);
1765 }
1766 /* use async fifo, then no need tune internal delay */
1767 sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
1768 MSDC_PATCH_BIT2_CFGRESP);
1769 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1770 MSDC_PATCH_BIT2_CFGCRCSTS);
1771 }
1772
1773 if (host->dev_comp->support_64g)
1774 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1775 MSDC_PB2_SUPPORT_64G);
1776 if (host->dev_comp->data_tune) {
1777 if (host->top_base) {
1778 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1779 PAD_DAT_RD_RXDLY_SEL);
1780 sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL,
1781 DATA_K_VALUE_SEL);
1782 sdr_set_bits(host->top_base + EMMC_TOP_CMD,
1783 PAD_CMD_RD_RXDLY_SEL);
1784 } else {
1785 sdr_set_bits(host->base + tune_reg,
1786 MSDC_PAD_TUNE_RD_SEL |
1787 MSDC_PAD_TUNE_CMD_SEL);
1788 }
1789 } else {
1790 /* choose clock tune */
1791 if (host->top_base)
1792 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1793 PAD_RXDLY_SEL);
1794 else
1795 sdr_set_bits(host->base + tune_reg,
1796 MSDC_PAD_TUNE_RXDLYSEL);
1797 }
1798
1799 if (mmc->caps2 & MMC_CAP2_NO_SDIO) {
1800 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1801 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1802 sdr_clr_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
1803 } else {
1804 /* Configure to enable SDIO mode, otherwise SDIO CMD5 fails */
1805 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1806
1807 /* Config SDIO device detect interrupt function */
1808 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1809 sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
1810 }
1811
1812 /* Configure to default data timeout */
1813 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
1814
1815 host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
1816 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
1817 if (host->top_base) {
1818 host->def_tune_para.emmc_top_control =
1819 readl(host->top_base + EMMC_TOP_CONTROL);
1820 host->def_tune_para.emmc_top_cmd =
1821 readl(host->top_base + EMMC_TOP_CMD);
1822 host->saved_tune_para.emmc_top_control =
1823 readl(host->top_base + EMMC_TOP_CONTROL);
1824 host->saved_tune_para.emmc_top_cmd =
1825 readl(host->top_base + EMMC_TOP_CMD);
1826 } else {
1827 host->def_tune_para.pad_tune = readl(host->base + tune_reg);
1828 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
1829 }
1830 dev_dbg(host->dev, "init hardware done!");
1831}
1832
1833static void msdc_deinit_hw(struct msdc_host *host)
1834{
1835 u32 val;
1836
1837 if (host->internal_cd) {
1838 /* Disabled card-detect */
1839 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1840 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1841 }
1842
1843 /* Disable and clear all interrupts */
1844 writel(0, host->base + MSDC_INTEN);
1845
1846 val = readl(host->base + MSDC_INT);
1847 writel(val, host->base + MSDC_INT);
1848}
1849
1850/* init gpd and bd list in msdc_drv_probe */
1851static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
1852{
1853 struct mt_gpdma_desc *gpd = dma->gpd;
1854 struct mt_bdma_desc *bd = dma->bd;
1855 dma_addr_t dma_addr;
1856 int i;
1857
1858 memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
1859
1860 dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc);
1861 gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
1862 /* gpd->next is must set for desc DMA
1863 * That's why must alloc 2 gpd structure.
1864 */
1865 gpd->next = lower_32_bits(dma_addr);
1866 if (host->dev_comp->support_64g)
1867 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1868
1869 dma_addr = dma->bd_addr;
1870 gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */
1871 if (host->dev_comp->support_64g)
1872 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28;
1873
1874 memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
1875 for (i = 0; i < (MAX_BD_NUM - 1); i++) {
1876 dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1);
1877 bd[i].next = lower_32_bits(dma_addr);
1878 if (host->dev_comp->support_64g)
1879 bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1880 }
1881}
1882
1883static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1884{
1885 struct msdc_host *host = mmc_priv(mmc);
1886 int ret;
1887
1888 msdc_set_buswidth(host, ios->bus_width);
1889
1890 /* Suspend/Resume will do power off/on */
1891 switch (ios->power_mode) {
1892 case MMC_POWER_UP:
1893 if (!IS_ERR(mmc->supply.vmmc)) {
1894 msdc_init_hw(host);
1895 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
1896 ios->vdd);
1897 if (ret) {
1898 dev_err(host->dev, "Failed to set vmmc power!\n");
1899 return;
1900 }
1901 }
1902 break;
1903 case MMC_POWER_ON:
1904 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
1905 ret = regulator_enable(mmc->supply.vqmmc);
1906 if (ret)
1907 dev_err(host->dev, "Failed to set vqmmc power!\n");
1908 else
1909 host->vqmmc_enabled = true;
1910 }
1911 break;
1912 case MMC_POWER_OFF:
1913 if (!IS_ERR(mmc->supply.vmmc))
1914 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
1915
1916 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
1917 regulator_disable(mmc->supply.vqmmc);
1918 host->vqmmc_enabled = false;
1919 }
1920 break;
1921 default:
1922 break;
1923 }
1924
1925 if (host->mclk != ios->clock || host->timing != ios->timing)
1926 msdc_set_mclk(host, ios->timing, ios->clock);
1927}
1928
1929static u32 test_delay_bit(u32 delay, u32 bit)
1930{
1931 bit %= PAD_DELAY_MAX;
1932 return delay & BIT(bit);
1933}
1934
1935static int get_delay_len(u32 delay, u32 start_bit)
1936{
1937 int i;
1938
1939 for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) {
1940 if (test_delay_bit(delay, start_bit + i) == 0)
1941 return i;
1942 }
1943 return PAD_DELAY_MAX - start_bit;
1944}
1945
1946static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
1947{
1948 int start = 0, len = 0;
1949 int start_final = 0, len_final = 0;
1950 u8 final_phase = 0xff;
1951 struct msdc_delay_phase delay_phase = { 0, };
1952
1953 if (delay == 0) {
1954 dev_err(host->dev, "phase error: [map:%x]\n", delay);
1955 delay_phase.final_phase = final_phase;
1956 return delay_phase;
1957 }
1958
1959 while (start < PAD_DELAY_MAX) {
1960 len = get_delay_len(delay, start);
1961 if (len_final < len) {
1962 start_final = start;
1963 len_final = len;
1964 }
1965 start += len ? len : 1;
1966 if (len >= 12 && start_final < 4)
1967 break;
1968 }
1969
1970 /* The rule is that to find the smallest delay cell */
1971 if (start_final == 0)
1972 final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
1973 else
1974 final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
1975 dev_dbg(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
1976 delay, len_final, final_phase);
1977
1978 delay_phase.maxlen = len_final;
1979 delay_phase.start = start_final;
1980 delay_phase.final_phase = final_phase;
1981 return delay_phase;
1982}
1983
1984static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value)
1985{
1986 u32 tune_reg = host->dev_comp->pad_tune_reg;
1987
1988 if (host->top_base)
1989 sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY,
1990 value);
1991 else
1992 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
1993 value);
1994}
1995
1996static inline void msdc_set_data_delay(struct msdc_host *host, u32 value)
1997{
1998 u32 tune_reg = host->dev_comp->pad_tune_reg;
1999
2000 if (host->top_base)
2001 sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
2002 PAD_DAT_RD_RXDLY, value);
2003 else
2004 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY,
2005 value);
2006}
2007
2008static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
2009{
2010 struct msdc_host *host = mmc_priv(mmc);
2011 u32 rise_delay = 0, fall_delay = 0;
2012 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
2013 struct msdc_delay_phase internal_delay_phase;
2014 u8 final_delay, final_maxlen;
2015 u32 internal_delay = 0;
2016 u32 tune_reg = host->dev_comp->pad_tune_reg;
2017 int cmd_err;
2018 int i, j;
2019
2020 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
2021 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
2022 sdr_set_field(host->base + tune_reg,
2023 MSDC_PAD_TUNE_CMDRRDLY,
2024 host->hs200_cmd_int_delay);
2025
2026 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2027 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2028 msdc_set_cmd_delay(host, i);
2029 /*
2030 * Using the same parameters, it may sometimes pass the test,
2031 * but sometimes it may fail. To make sure the parameters are
2032 * more stable, we test each set of parameters 3 times.
2033 */
2034 for (j = 0; j < 3; j++) {
2035 mmc_send_tuning(mmc, opcode, &cmd_err);
2036 if (!cmd_err) {
2037 rise_delay |= BIT(i);
2038 } else {
2039 rise_delay &= ~BIT(i);
2040 break;
2041 }
2042 }
2043 }
2044 final_rise_delay = get_best_delay(host, rise_delay);
2045 /* if rising edge has enough margin, then do not scan falling edge */
2046 if (final_rise_delay.maxlen >= 12 ||
2047 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
2048 goto skip_fall;
2049
2050 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2051 for (i = 0; i < PAD_DELAY_MAX; i++) {
2052 msdc_set_cmd_delay(host, i);
2053 /*
2054 * Using the same parameters, it may sometimes pass the test,
2055 * but sometimes it may fail. To make sure the parameters are
2056 * more stable, we test each set of parameters 3 times.
2057 */
2058 for (j = 0; j < 3; j++) {
2059 mmc_send_tuning(mmc, opcode, &cmd_err);
2060 if (!cmd_err) {
2061 fall_delay |= BIT(i);
2062 } else {
2063 fall_delay &= ~BIT(i);
2064 break;
2065 }
2066 }
2067 }
2068 final_fall_delay = get_best_delay(host, fall_delay);
2069
2070skip_fall:
2071 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2072 if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4)
2073 final_maxlen = final_fall_delay.maxlen;
2074 if (final_maxlen == final_rise_delay.maxlen) {
2075 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2076 final_delay = final_rise_delay.final_phase;
2077 } else {
2078 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2079 final_delay = final_fall_delay.final_phase;
2080 }
2081 msdc_set_cmd_delay(host, final_delay);
2082
2083 if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
2084 goto skip_internal;
2085
2086 for (i = 0; i < PAD_DELAY_MAX; i++) {
2087 sdr_set_field(host->base + tune_reg,
2088 MSDC_PAD_TUNE_CMDRRDLY, i);
2089 mmc_send_tuning(mmc, opcode, &cmd_err);
2090 if (!cmd_err)
2091 internal_delay |= BIT(i);
2092 }
2093 dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay);
2094 internal_delay_phase = get_best_delay(host, internal_delay);
2095 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY,
2096 internal_delay_phase.final_phase);
2097skip_internal:
2098 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
2099 return final_delay == 0xff ? -EIO : 0;
2100}
2101
2102static int hs400_tune_response(struct mmc_host *mmc, u32 opcode)
2103{
2104 struct msdc_host *host = mmc_priv(mmc);
2105 u32 cmd_delay = 0;
2106 struct msdc_delay_phase final_cmd_delay = { 0,};
2107 u8 final_delay;
2108 int cmd_err;
2109 int i, j;
2110
2111 /* select EMMC50 PAD CMD tune */
2112 sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0));
2113 sdr_set_field(host->base + MSDC_PATCH_BIT1, MSDC_PATCH_BIT1_CMDTA, 2);
2114
2115 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
2116 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
2117 sdr_set_field(host->base + MSDC_PAD_TUNE,
2118 MSDC_PAD_TUNE_CMDRRDLY,
2119 host->hs200_cmd_int_delay);
2120
2121 if (host->hs400_cmd_resp_sel_rising)
2122 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2123 else
2124 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2125 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2126 sdr_set_field(host->base + PAD_CMD_TUNE,
2127 PAD_CMD_TUNE_RX_DLY3, i);
2128 /*
2129 * Using the same parameters, it may sometimes pass the test,
2130 * but sometimes it may fail. To make sure the parameters are
2131 * more stable, we test each set of parameters 3 times.
2132 */
2133 for (j = 0; j < 3; j++) {
2134 mmc_send_tuning(mmc, opcode, &cmd_err);
2135 if (!cmd_err) {
2136 cmd_delay |= BIT(i);
2137 } else {
2138 cmd_delay &= ~BIT(i);
2139 break;
2140 }
2141 }
2142 }
2143 final_cmd_delay = get_best_delay(host, cmd_delay);
2144 sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3,
2145 final_cmd_delay.final_phase);
2146 final_delay = final_cmd_delay.final_phase;
2147
2148 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
2149 return final_delay == 0xff ? -EIO : 0;
2150}
2151
2152static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
2153{
2154 struct msdc_host *host = mmc_priv(mmc);
2155 u32 rise_delay = 0, fall_delay = 0;
2156 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
2157 u8 final_delay, final_maxlen;
2158 int i, ret;
2159
2160 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
2161 host->latch_ck);
2162 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2163 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2164 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2165 msdc_set_data_delay(host, i);
2166 ret = mmc_send_tuning(mmc, opcode, NULL);
2167 if (!ret)
2168 rise_delay |= BIT(i);
2169 }
2170 final_rise_delay = get_best_delay(host, rise_delay);
2171 /* if rising edge has enough margin, then do not scan falling edge */
2172 if (final_rise_delay.maxlen >= 12 ||
2173 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
2174 goto skip_fall;
2175
2176 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2177 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2178 for (i = 0; i < PAD_DELAY_MAX; i++) {
2179 msdc_set_data_delay(host, i);
2180 ret = mmc_send_tuning(mmc, opcode, NULL);
2181 if (!ret)
2182 fall_delay |= BIT(i);
2183 }
2184 final_fall_delay = get_best_delay(host, fall_delay);
2185
2186skip_fall:
2187 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2188 if (final_maxlen == final_rise_delay.maxlen) {
2189 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2190 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2191 final_delay = final_rise_delay.final_phase;
2192 } else {
2193 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
2194 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
2195 final_delay = final_fall_delay.final_phase;
2196 }
2197 msdc_set_data_delay(host, final_delay);
2198
2199 dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay);
2200 return final_delay == 0xff ? -EIO : 0;
2201}
2202
2203/*
2204 * MSDC IP which supports data tune + async fifo can do CMD/DAT tune
2205 * together, which can save the tuning time.
2206 */
2207static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
2208{
2209 struct msdc_host *host = mmc_priv(mmc);
2210 u32 rise_delay = 0, fall_delay = 0;
2211 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
2212 u8 final_delay, final_maxlen;
2213 int i, ret;
2214
2215 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
2216 host->latch_ck);
2217
2218 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2219 sdr_clr_bits(host->base + MSDC_IOCON,
2220 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2221 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
2222 msdc_set_cmd_delay(host, i);
2223 msdc_set_data_delay(host, i);
2224 ret = mmc_send_tuning(mmc, opcode, NULL);
2225 if (!ret)
2226 rise_delay |= BIT(i);
2227 }
2228 final_rise_delay = get_best_delay(host, rise_delay);
2229 /* if rising edge has enough margin, then do not scan falling edge */
2230 if (final_rise_delay.maxlen >= 12 ||
2231 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
2232 goto skip_fall;
2233
2234 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2235 sdr_set_bits(host->base + MSDC_IOCON,
2236 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2237 for (i = 0; i < PAD_DELAY_MAX; i++) {
2238 msdc_set_cmd_delay(host, i);
2239 msdc_set_data_delay(host, i);
2240 ret = mmc_send_tuning(mmc, opcode, NULL);
2241 if (!ret)
2242 fall_delay |= BIT(i);
2243 }
2244 final_fall_delay = get_best_delay(host, fall_delay);
2245
2246skip_fall:
2247 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2248 if (final_maxlen == final_rise_delay.maxlen) {
2249 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2250 sdr_clr_bits(host->base + MSDC_IOCON,
2251 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2252 final_delay = final_rise_delay.final_phase;
2253 } else {
2254 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2255 sdr_set_bits(host->base + MSDC_IOCON,
2256 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2257 final_delay = final_fall_delay.final_phase;
2258 }
2259
2260 msdc_set_cmd_delay(host, final_delay);
2261 msdc_set_data_delay(host, final_delay);
2262
2263 dev_dbg(host->dev, "Final pad delay: %x\n", final_delay);
2264 return final_delay == 0xff ? -EIO : 0;
2265}
2266
2267static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
2268{
2269 struct msdc_host *host = mmc_priv(mmc);
2270 int ret;
2271 u32 tune_reg = host->dev_comp->pad_tune_reg;
2272
2273 if (host->dev_comp->data_tune && host->dev_comp->async_fifo) {
2274 ret = msdc_tune_together(mmc, opcode);
2275 if (host->hs400_mode) {
2276 sdr_clr_bits(host->base + MSDC_IOCON,
2277 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2278 msdc_set_data_delay(host, 0);
2279 }
2280 goto tune_done;
2281 }
2282 if (host->hs400_mode &&
2283 host->dev_comp->hs400_tune)
2284 ret = hs400_tune_response(mmc, opcode);
2285 else
2286 ret = msdc_tune_response(mmc, opcode);
2287 if (ret == -EIO) {
2288 dev_err(host->dev, "Tune response fail!\n");
2289 return ret;
2290 }
2291 if (host->hs400_mode == false) {
2292 ret = msdc_tune_data(mmc, opcode);
2293 if (ret == -EIO)
2294 dev_err(host->dev, "Tune data fail!\n");
2295 }
2296
2297tune_done:
2298 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
2299 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
2300 host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2301 if (host->top_base) {
2302 host->saved_tune_para.emmc_top_control = readl(host->top_base +
2303 EMMC_TOP_CONTROL);
2304 host->saved_tune_para.emmc_top_cmd = readl(host->top_base +
2305 EMMC_TOP_CMD);
2306 }
2307 return ret;
2308}
2309
2310static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
2311{
2312 struct msdc_host *host = mmc_priv(mmc);
2313 host->hs400_mode = true;
2314
2315 if (host->top_base)
2316 writel(host->hs400_ds_delay,
2317 host->top_base + EMMC50_PAD_DS_TUNE);
2318 else
2319 writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
2320 /* hs400 mode must set it to 0 */
2321 sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS);
2322 /* to improve read performance, set outstanding to 2 */
2323 sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2);
2324
2325 return 0;
2326}
2327
2328static int msdc_execute_hs400_tuning(struct mmc_host *mmc, struct mmc_card *card)
2329{
2330 struct msdc_host *host = mmc_priv(mmc);
2331 struct msdc_delay_phase dly1_delay;
2332 u32 val, result_dly1 = 0;
2333 u8 *ext_csd;
2334 int i, ret;
2335
2336 if (host->top_base) {
2337 sdr_set_bits(host->top_base + EMMC50_PAD_DS_TUNE,
2338 PAD_DS_DLY_SEL);
2339 if (host->hs400_ds_dly3)
2340 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
2341 PAD_DS_DLY3, host->hs400_ds_dly3);
2342 } else {
2343 sdr_set_bits(host->base + PAD_DS_TUNE, PAD_DS_TUNE_DLY_SEL);
2344 if (host->hs400_ds_dly3)
2345 sdr_set_field(host->base + PAD_DS_TUNE,
2346 PAD_DS_TUNE_DLY3, host->hs400_ds_dly3);
2347 }
2348
2349 host->hs400_tuning = true;
2350 for (i = 0; i < PAD_DELAY_MAX; i++) {
2351 if (host->top_base)
2352 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
2353 PAD_DS_DLY1, i);
2354 else
2355 sdr_set_field(host->base + PAD_DS_TUNE,
2356 PAD_DS_TUNE_DLY1, i);
2357 ret = mmc_get_ext_csd(card, &ext_csd);
2358 if (!ret) {
2359 result_dly1 |= BIT(i);
2360 kfree(ext_csd);
2361 }
2362 }
2363 host->hs400_tuning = false;
2364
2365 dly1_delay = get_best_delay(host, result_dly1);
2366 if (dly1_delay.maxlen == 0) {
2367 dev_err(host->dev, "Failed to get DLY1 delay!\n");
2368 goto fail;
2369 }
2370 if (host->top_base)
2371 sdr_set_field(host->top_base + EMMC50_PAD_DS_TUNE,
2372 PAD_DS_DLY1, dly1_delay.final_phase);
2373 else
2374 sdr_set_field(host->base + PAD_DS_TUNE,
2375 PAD_DS_TUNE_DLY1, dly1_delay.final_phase);
2376
2377 if (host->top_base)
2378 val = readl(host->top_base + EMMC50_PAD_DS_TUNE);
2379 else
2380 val = readl(host->base + PAD_DS_TUNE);
2381
2382 dev_info(host->dev, "Final PAD_DS_TUNE: 0x%x\n", val);
2383
2384 return 0;
2385
2386fail:
2387 dev_err(host->dev, "Failed to tuning DS pin delay!\n");
2388 return -EIO;
2389}
2390
2391static void msdc_hw_reset(struct mmc_host *mmc)
2392{
2393 struct msdc_host *host = mmc_priv(mmc);
2394
2395 sdr_set_bits(host->base + EMMC_IOCON, 1);
2396 udelay(10); /* 10us is enough */
2397 sdr_clr_bits(host->base + EMMC_IOCON, 1);
2398}
2399
2400static void msdc_ack_sdio_irq(struct mmc_host *mmc)
2401{
2402 unsigned long flags;
2403 struct msdc_host *host = mmc_priv(mmc);
2404
2405 spin_lock_irqsave(&host->lock, flags);
2406 __msdc_enable_sdio_irq(host, 1);
2407 spin_unlock_irqrestore(&host->lock, flags);
2408}
2409
2410static int msdc_get_cd(struct mmc_host *mmc)
2411{
2412 struct msdc_host *host = mmc_priv(mmc);
2413 int val;
2414
2415 if (mmc->caps & MMC_CAP_NONREMOVABLE)
2416 return 1;
2417
2418 if (!host->internal_cd)
2419 return mmc_gpio_get_cd(mmc);
2420
2421 val = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS;
2422 if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)
2423 return !!val;
2424 else
2425 return !val;
2426}
2427
2428static void msdc_hs400_enhanced_strobe(struct mmc_host *mmc,
2429 struct mmc_ios *ios)
2430{
2431 struct msdc_host *host = mmc_priv(mmc);
2432
2433 if (ios->enhanced_strobe) {
2434 msdc_prepare_hs400_tuning(mmc, ios);
2435 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_PADCMD_LATCHCK, 1);
2436 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_CMD_RESP_SEL, 1);
2437 sdr_set_field(host->base + EMMC50_CFG1, EMMC50_CFG1_DS_CFG, 1);
2438
2439 sdr_clr_bits(host->base + CQHCI_SETTING, CQHCI_RD_CMD_WND_SEL);
2440 sdr_clr_bits(host->base + CQHCI_SETTING, CQHCI_WR_CMD_WND_SEL);
2441 sdr_clr_bits(host->base + EMMC51_CFG0, CMDQ_RDAT_CNT);
2442 } else {
2443 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_PADCMD_LATCHCK, 0);
2444 sdr_set_field(host->base + EMMC50_CFG0, EMMC50_CFG_CMD_RESP_SEL, 0);
2445 sdr_set_field(host->base + EMMC50_CFG1, EMMC50_CFG1_DS_CFG, 0);
2446
2447 sdr_set_bits(host->base + CQHCI_SETTING, CQHCI_RD_CMD_WND_SEL);
2448 sdr_set_bits(host->base + CQHCI_SETTING, CQHCI_WR_CMD_WND_SEL);
2449 sdr_set_field(host->base + EMMC51_CFG0, CMDQ_RDAT_CNT, 0xb4);
2450 }
2451}
2452
2453static void msdc_cqe_enable(struct mmc_host *mmc)
2454{
2455 struct msdc_host *host = mmc_priv(mmc);
2456
2457 /* enable cmdq irq */
2458 writel(MSDC_INT_CMDQ, host->base + MSDC_INTEN);
2459 /* enable busy check */
2460 sdr_set_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL);
2461 /* default write data / busy timeout 20s */
2462 msdc_set_busy_timeout(host, 20 * 1000000000ULL, 0);
2463 /* default read data timeout 1s */
2464 msdc_set_timeout(host, 1000000000ULL, 0);
2465}
2466
2467static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
2468{
2469 struct msdc_host *host = mmc_priv(mmc);
2470 unsigned int val = 0;
2471
2472 /* disable cmdq irq */
2473 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INT_CMDQ);
2474 /* disable busy check */
2475 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL);
2476
2477 val = readl(host->base + MSDC_INT);
2478 writel(val, host->base + MSDC_INT);
2479
2480 if (recovery) {
2481 sdr_set_field(host->base + MSDC_DMA_CTRL,
2482 MSDC_DMA_CTRL_STOP, 1);
2483 if (WARN_ON(readl_poll_timeout(host->base + MSDC_DMA_CTRL, val,
2484 !(val & MSDC_DMA_CTRL_STOP), 1, 3000)))
2485 return;
2486 if (WARN_ON(readl_poll_timeout(host->base + MSDC_DMA_CFG, val,
2487 !(val & MSDC_DMA_CFG_STS), 1, 3000)))
2488 return;
2489 msdc_reset_hw(host);
2490 }
2491}
2492
2493static void msdc_cqe_pre_enable(struct mmc_host *mmc)
2494{
2495 struct cqhci_host *cq_host = mmc->cqe_private;
2496 u32 reg;
2497
2498 reg = cqhci_readl(cq_host, CQHCI_CFG);
2499 reg |= CQHCI_ENABLE;
2500 cqhci_writel(cq_host, reg, CQHCI_CFG);
2501}
2502
2503static void msdc_cqe_post_disable(struct mmc_host *mmc)
2504{
2505 struct cqhci_host *cq_host = mmc->cqe_private;
2506 u32 reg;
2507
2508 reg = cqhci_readl(cq_host, CQHCI_CFG);
2509 reg &= ~CQHCI_ENABLE;
2510 cqhci_writel(cq_host, reg, CQHCI_CFG);
2511}
2512
2513static const struct mmc_host_ops mt_msdc_ops = {
2514 .post_req = msdc_post_req,
2515 .pre_req = msdc_pre_req,
2516 .request = msdc_ops_request,
2517 .set_ios = msdc_ops_set_ios,
2518 .get_ro = mmc_gpio_get_ro,
2519 .get_cd = msdc_get_cd,
2520 .hs400_enhanced_strobe = msdc_hs400_enhanced_strobe,
2521 .enable_sdio_irq = msdc_enable_sdio_irq,
2522 .ack_sdio_irq = msdc_ack_sdio_irq,
2523 .start_signal_voltage_switch = msdc_ops_switch_volt,
2524 .card_busy = msdc_card_busy,
2525 .execute_tuning = msdc_execute_tuning,
2526 .prepare_hs400_tuning = msdc_prepare_hs400_tuning,
2527 .execute_hs400_tuning = msdc_execute_hs400_tuning,
2528 .card_hw_reset = msdc_hw_reset,
2529};
2530
2531static const struct cqhci_host_ops msdc_cmdq_ops = {
2532 .enable = msdc_cqe_enable,
2533 .disable = msdc_cqe_disable,
2534 .pre_enable = msdc_cqe_pre_enable,
2535 .post_disable = msdc_cqe_post_disable,
2536};
2537
2538static void msdc_of_property_parse(struct platform_device *pdev,
2539 struct msdc_host *host)
2540{
2541 of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck",
2542 &host->latch_ck);
2543
2544 of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay",
2545 &host->hs400_ds_delay);
2546
2547 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-ds-dly3",
2548 &host->hs400_ds_dly3);
2549
2550 of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay",
2551 &host->hs200_cmd_int_delay);
2552
2553 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay",
2554 &host->hs400_cmd_int_delay);
2555
2556 if (of_property_read_bool(pdev->dev.of_node,
2557 "mediatek,hs400-cmd-resp-sel-rising"))
2558 host->hs400_cmd_resp_sel_rising = true;
2559 else
2560 host->hs400_cmd_resp_sel_rising = false;
2561
2562 if (of_property_read_bool(pdev->dev.of_node,
2563 "supports-cqe"))
2564 host->cqhci = true;
2565 else
2566 host->cqhci = false;
2567}
2568
2569static int msdc_of_clock_parse(struct platform_device *pdev,
2570 struct msdc_host *host)
2571{
2572 int ret;
2573
2574 host->src_clk = devm_clk_get(&pdev->dev, "source");
2575 if (IS_ERR(host->src_clk))
2576 return PTR_ERR(host->src_clk);
2577
2578 host->h_clk = devm_clk_get(&pdev->dev, "hclk");
2579 if (IS_ERR(host->h_clk))
2580 return PTR_ERR(host->h_clk);
2581
2582 host->bus_clk = devm_clk_get_optional(&pdev->dev, "bus_clk");
2583 if (IS_ERR(host->bus_clk))
2584 host->bus_clk = NULL;
2585
2586 /*source clock control gate is optional clock*/
2587 host->src_clk_cg = devm_clk_get_optional(&pdev->dev, "source_cg");
2588 if (IS_ERR(host->src_clk_cg))
2589 return PTR_ERR(host->src_clk_cg);
2590
2591 /*
2592 * Fallback for legacy device-trees: src_clk and HCLK use the same
2593 * bit to control gating but they are parented to a different mux,
2594 * hence if our intention is to gate only the source, required
2595 * during a clk mode switch to avoid hw hangs, we need to gate
2596 * its parent (specified as a different clock only on new DTs).
2597 */
2598 if (!host->src_clk_cg) {
2599 host->src_clk_cg = clk_get_parent(host->src_clk);
2600 if (IS_ERR(host->src_clk_cg))
2601 return PTR_ERR(host->src_clk_cg);
2602 }
2603
2604 /* If present, always enable for this clock gate */
2605 host->sys_clk_cg = devm_clk_get_optional_enabled(&pdev->dev, "sys_cg");
2606 if (IS_ERR(host->sys_clk_cg))
2607 host->sys_clk_cg = NULL;
2608
2609 host->bulk_clks[0].id = "pclk_cg";
2610 host->bulk_clks[1].id = "axi_cg";
2611 host->bulk_clks[2].id = "ahb_cg";
2612 ret = devm_clk_bulk_get_optional(&pdev->dev, MSDC_NR_CLOCKS,
2613 host->bulk_clks);
2614 if (ret) {
2615 dev_err(&pdev->dev, "Cannot get pclk/axi/ahb clock gates\n");
2616 return ret;
2617 }
2618
2619 return 0;
2620}
2621
2622static int msdc_drv_probe(struct platform_device *pdev)
2623{
2624 struct mmc_host *mmc;
2625 struct msdc_host *host;
2626 struct resource *res;
2627 int ret;
2628
2629 if (!pdev->dev.of_node) {
2630 dev_err(&pdev->dev, "No DT found\n");
2631 return -EINVAL;
2632 }
2633
2634 /* Allocate MMC host for this device */
2635 mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
2636 if (!mmc)
2637 return -ENOMEM;
2638
2639 host = mmc_priv(mmc);
2640 ret = mmc_of_parse(mmc);
2641 if (ret)
2642 goto host_free;
2643
2644 host->base = devm_platform_ioremap_resource(pdev, 0);
2645 if (IS_ERR(host->base)) {
2646 ret = PTR_ERR(host->base);
2647 goto host_free;
2648 }
2649
2650 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2651 if (res) {
2652 host->top_base = devm_ioremap_resource(&pdev->dev, res);
2653 if (IS_ERR(host->top_base))
2654 host->top_base = NULL;
2655 }
2656
2657 ret = mmc_regulator_get_supply(mmc);
2658 if (ret)
2659 goto host_free;
2660
2661 ret = msdc_of_clock_parse(pdev, host);
2662 if (ret)
2663 goto host_free;
2664
2665 host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
2666 "hrst");
2667 if (IS_ERR(host->reset)) {
2668 ret = PTR_ERR(host->reset);
2669 goto host_free;
2670 }
2671
2672 /* only eMMC has crypto property */
2673 if (!(mmc->caps2 & MMC_CAP2_NO_MMC)) {
2674 host->crypto_clk = devm_clk_get_optional(&pdev->dev, "crypto");
2675 if (IS_ERR(host->crypto_clk))
2676 host->crypto_clk = NULL;
2677 else
2678 mmc->caps2 |= MMC_CAP2_CRYPTO;
2679 }
2680
2681 host->irq = platform_get_irq(pdev, 0);
2682 if (host->irq < 0) {
2683 ret = -EINVAL;
2684 goto host_free;
2685 }
2686
2687 host->pinctrl = devm_pinctrl_get(&pdev->dev);
2688 if (IS_ERR(host->pinctrl)) {
2689 ret = PTR_ERR(host->pinctrl);
2690 dev_err(&pdev->dev, "Cannot find pinctrl!\n");
2691 goto host_free;
2692 }
2693
2694 host->pins_default = pinctrl_lookup_state(host->pinctrl, "default");
2695 if (IS_ERR(host->pins_default)) {
2696 ret = PTR_ERR(host->pins_default);
2697 dev_err(&pdev->dev, "Cannot find pinctrl default!\n");
2698 goto host_free;
2699 }
2700
2701 host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
2702 if (IS_ERR(host->pins_uhs)) {
2703 ret = PTR_ERR(host->pins_uhs);
2704 dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n");
2705 goto host_free;
2706 }
2707
2708 /* Support for SDIO eint irq ? */
2709 if ((mmc->pm_caps & MMC_PM_WAKE_SDIO_IRQ) && (mmc->pm_caps & MMC_PM_KEEP_POWER)) {
2710 host->eint_irq = platform_get_irq_byname(pdev, "sdio_wakeup");
2711 if (host->eint_irq > 0) {
2712 host->pins_eint = pinctrl_lookup_state(host->pinctrl, "state_eint");
2713 if (IS_ERR(host->pins_eint)) {
2714 dev_err(&pdev->dev, "Cannot find pinctrl eint!\n");
2715 host->pins_eint = NULL;
2716 } else {
2717 device_init_wakeup(&pdev->dev, true);
2718 }
2719 }
2720 }
2721
2722 msdc_of_property_parse(pdev, host);
2723
2724 host->dev = &pdev->dev;
2725 host->dev_comp = of_device_get_match_data(&pdev->dev);
2726 host->src_clk_freq = clk_get_rate(host->src_clk);
2727 /* Set host parameters to mmc */
2728 mmc->ops = &mt_msdc_ops;
2729 if (host->dev_comp->clk_div_bits == 8)
2730 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255);
2731 else
2732 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095);
2733
2734 if (!(mmc->caps & MMC_CAP_NONREMOVABLE) &&
2735 !mmc_can_gpio_cd(mmc) &&
2736 host->dev_comp->use_internal_cd) {
2737 /*
2738 * Is removable but no GPIO declared, so
2739 * use internal functionality.
2740 */
2741 host->internal_cd = true;
2742 }
2743
2744 if (mmc->caps & MMC_CAP_SDIO_IRQ)
2745 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
2746
2747 mmc->caps |= MMC_CAP_CMD23;
2748 if (host->cqhci)
2749 mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
2750 /* MMC core transfer sizes tunable parameters */
2751 mmc->max_segs = MAX_BD_NUM;
2752 if (host->dev_comp->support_64g)
2753 mmc->max_seg_size = BDMA_DESC_BUFLEN_EXT;
2754 else
2755 mmc->max_seg_size = BDMA_DESC_BUFLEN;
2756 mmc->max_blk_size = 2048;
2757 mmc->max_req_size = 512 * 1024;
2758 mmc->max_blk_count = mmc->max_req_size / 512;
2759 if (host->dev_comp->support_64g)
2760 host->dma_mask = DMA_BIT_MASK(36);
2761 else
2762 host->dma_mask = DMA_BIT_MASK(32);
2763 mmc_dev(mmc)->dma_mask = &host->dma_mask;
2764
2765 host->timeout_clks = 3 * 1048576;
2766 host->dma.gpd = dma_alloc_coherent(&pdev->dev,
2767 2 * sizeof(struct mt_gpdma_desc),
2768 &host->dma.gpd_addr, GFP_KERNEL);
2769 host->dma.bd = dma_alloc_coherent(&pdev->dev,
2770 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2771 &host->dma.bd_addr, GFP_KERNEL);
2772 if (!host->dma.gpd || !host->dma.bd) {
2773 ret = -ENOMEM;
2774 goto release_mem;
2775 }
2776 msdc_init_gpd_bd(host, &host->dma);
2777 INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout);
2778 spin_lock_init(&host->lock);
2779
2780 platform_set_drvdata(pdev, mmc);
2781 ret = msdc_ungate_clock(host);
2782 if (ret) {
2783 dev_err(&pdev->dev, "Cannot ungate clocks!\n");
2784 goto release_mem;
2785 }
2786 msdc_init_hw(host);
2787
2788 if (mmc->caps2 & MMC_CAP2_CQE) {
2789 host->cq_host = devm_kzalloc(mmc->parent,
2790 sizeof(*host->cq_host),
2791 GFP_KERNEL);
2792 if (!host->cq_host) {
2793 ret = -ENOMEM;
2794 goto host_free;
2795 }
2796 host->cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
2797 host->cq_host->mmio = host->base + 0x800;
2798 host->cq_host->ops = &msdc_cmdq_ops;
2799 ret = cqhci_init(host->cq_host, mmc, true);
2800 if (ret)
2801 goto host_free;
2802 mmc->max_segs = 128;
2803 /* cqhci 16bit length */
2804 /* 0 size, means 65536 so we don't have to -1 here */
2805 mmc->max_seg_size = 64 * 1024;
2806 }
2807
2808 ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq,
2809 IRQF_TRIGGER_NONE, pdev->name, host);
2810 if (ret)
2811 goto release;
2812
2813 pm_runtime_set_active(host->dev);
2814 pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY);
2815 pm_runtime_use_autosuspend(host->dev);
2816 pm_runtime_enable(host->dev);
2817 ret = mmc_add_host(mmc);
2818
2819 if (ret)
2820 goto end;
2821
2822 return 0;
2823end:
2824 pm_runtime_disable(host->dev);
2825release:
2826 platform_set_drvdata(pdev, NULL);
2827 msdc_deinit_hw(host);
2828 msdc_gate_clock(host);
2829release_mem:
2830 if (host->dma.gpd)
2831 dma_free_coherent(&pdev->dev,
2832 2 * sizeof(struct mt_gpdma_desc),
2833 host->dma.gpd, host->dma.gpd_addr);
2834 if (host->dma.bd)
2835 dma_free_coherent(&pdev->dev,
2836 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2837 host->dma.bd, host->dma.bd_addr);
2838host_free:
2839 mmc_free_host(mmc);
2840
2841 return ret;
2842}
2843
2844static int msdc_drv_remove(struct platform_device *pdev)
2845{
2846 struct mmc_host *mmc;
2847 struct msdc_host *host;
2848
2849 mmc = platform_get_drvdata(pdev);
2850 host = mmc_priv(mmc);
2851
2852 pm_runtime_get_sync(host->dev);
2853
2854 platform_set_drvdata(pdev, NULL);
2855 mmc_remove_host(mmc);
2856 msdc_deinit_hw(host);
2857 msdc_gate_clock(host);
2858
2859 pm_runtime_disable(host->dev);
2860 pm_runtime_put_noidle(host->dev);
2861 dma_free_coherent(&pdev->dev,
2862 2 * sizeof(struct mt_gpdma_desc),
2863 host->dma.gpd, host->dma.gpd_addr);
2864 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2865 host->dma.bd, host->dma.bd_addr);
2866
2867 mmc_free_host(mmc);
2868
2869 return 0;
2870}
2871
2872static void msdc_save_reg(struct msdc_host *host)
2873{
2874 u32 tune_reg = host->dev_comp->pad_tune_reg;
2875
2876 host->save_para.msdc_cfg = readl(host->base + MSDC_CFG);
2877 host->save_para.iocon = readl(host->base + MSDC_IOCON);
2878 host->save_para.sdc_cfg = readl(host->base + SDC_CFG);
2879 host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
2880 host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
2881 host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2);
2882 host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
2883 host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2884 host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
2885 host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3);
2886 host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG);
2887 if (host->top_base) {
2888 host->save_para.emmc_top_control =
2889 readl(host->top_base + EMMC_TOP_CONTROL);
2890 host->save_para.emmc_top_cmd =
2891 readl(host->top_base + EMMC_TOP_CMD);
2892 host->save_para.emmc50_pad_ds_tune =
2893 readl(host->top_base + EMMC50_PAD_DS_TUNE);
2894 } else {
2895 host->save_para.pad_tune = readl(host->base + tune_reg);
2896 }
2897}
2898
2899static void msdc_restore_reg(struct msdc_host *host)
2900{
2901 struct mmc_host *mmc = mmc_from_priv(host);
2902 u32 tune_reg = host->dev_comp->pad_tune_reg;
2903
2904 writel(host->save_para.msdc_cfg, host->base + MSDC_CFG);
2905 writel(host->save_para.iocon, host->base + MSDC_IOCON);
2906 writel(host->save_para.sdc_cfg, host->base + SDC_CFG);
2907 writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
2908 writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
2909 writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2);
2910 writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
2911 writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
2912 writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
2913 writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3);
2914 writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG);
2915 if (host->top_base) {
2916 writel(host->save_para.emmc_top_control,
2917 host->top_base + EMMC_TOP_CONTROL);
2918 writel(host->save_para.emmc_top_cmd,
2919 host->top_base + EMMC_TOP_CMD);
2920 writel(host->save_para.emmc50_pad_ds_tune,
2921 host->top_base + EMMC50_PAD_DS_TUNE);
2922 } else {
2923 writel(host->save_para.pad_tune, host->base + tune_reg);
2924 }
2925
2926 if (sdio_irq_claimed(mmc))
2927 __msdc_enable_sdio_irq(host, 1);
2928}
2929
2930static int __maybe_unused msdc_runtime_suspend(struct device *dev)
2931{
2932 struct mmc_host *mmc = dev_get_drvdata(dev);
2933 struct msdc_host *host = mmc_priv(mmc);
2934
2935 msdc_save_reg(host);
2936
2937 if (sdio_irq_claimed(mmc)) {
2938 if (host->pins_eint) {
2939 disable_irq(host->irq);
2940 pinctrl_select_state(host->pinctrl, host->pins_eint);
2941 }
2942
2943 __msdc_enable_sdio_irq(host, 0);
2944 }
2945 msdc_gate_clock(host);
2946 return 0;
2947}
2948
2949static int __maybe_unused msdc_runtime_resume(struct device *dev)
2950{
2951 struct mmc_host *mmc = dev_get_drvdata(dev);
2952 struct msdc_host *host = mmc_priv(mmc);
2953 int ret;
2954
2955 ret = msdc_ungate_clock(host);
2956 if (ret)
2957 return ret;
2958
2959 msdc_restore_reg(host);
2960
2961 if (sdio_irq_claimed(mmc) && host->pins_eint) {
2962 pinctrl_select_state(host->pinctrl, host->pins_uhs);
2963 enable_irq(host->irq);
2964 }
2965 return 0;
2966}
2967
2968static int __maybe_unused msdc_suspend(struct device *dev)
2969{
2970 struct mmc_host *mmc = dev_get_drvdata(dev);
2971 struct msdc_host *host = mmc_priv(mmc);
2972 int ret;
2973 u32 val;
2974
2975 if (mmc->caps2 & MMC_CAP2_CQE) {
2976 ret = cqhci_suspend(mmc);
2977 if (ret)
2978 return ret;
2979 val = readl(host->base + MSDC_INT);
2980 writel(val, host->base + MSDC_INT);
2981 }
2982
2983 /*
2984 * Bump up runtime PM usage counter otherwise dev->power.needs_force_resume will
2985 * not be marked as 1, pm_runtime_force_resume() will go out directly.
2986 */
2987 if (sdio_irq_claimed(mmc) && host->pins_eint)
2988 pm_runtime_get_noresume(dev);
2989
2990 return pm_runtime_force_suspend(dev);
2991}
2992
2993static int __maybe_unused msdc_resume(struct device *dev)
2994{
2995 struct mmc_host *mmc = dev_get_drvdata(dev);
2996 struct msdc_host *host = mmc_priv(mmc);
2997
2998 if (sdio_irq_claimed(mmc) && host->pins_eint)
2999 pm_runtime_put_noidle(dev);
3000
3001 return pm_runtime_force_resume(dev);
3002}
3003
3004static const struct dev_pm_ops msdc_dev_pm_ops = {
3005 SET_SYSTEM_SLEEP_PM_OPS(msdc_suspend, msdc_resume)
3006 SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL)
3007};
3008
3009static struct platform_driver mt_msdc_driver = {
3010 .probe = msdc_drv_probe,
3011 .remove = msdc_drv_remove,
3012 .driver = {
3013 .name = "mtk-msdc",
3014 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
3015 .of_match_table = msdc_of_ids,
3016 .pm = &msdc_dev_pm_ops,
3017 },
3018};
3019
3020module_platform_driver(mt_msdc_driver);
3021MODULE_LICENSE("GPL v2");
3022MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2014-2015 MediaTek Inc.
4 * Author: Chaotian.Jing <chaotian.jing@mediatek.com>
5 */
6
7#include <linux/module.h>
8#include <linux/clk.h>
9#include <linux/delay.h>
10#include <linux/dma-mapping.h>
11#include <linux/ioport.h>
12#include <linux/irq.h>
13#include <linux/of_address.h>
14#include <linux/of_device.h>
15#include <linux/of_irq.h>
16#include <linux/of_gpio.h>
17#include <linux/pinctrl/consumer.h>
18#include <linux/platform_device.h>
19#include <linux/pm.h>
20#include <linux/pm_runtime.h>
21#include <linux/regulator/consumer.h>
22#include <linux/slab.h>
23#include <linux/spinlock.h>
24#include <linux/interrupt.h>
25
26#include <linux/mmc/card.h>
27#include <linux/mmc/core.h>
28#include <linux/mmc/host.h>
29#include <linux/mmc/mmc.h>
30#include <linux/mmc/sd.h>
31#include <linux/mmc/sdio.h>
32#include <linux/mmc/slot-gpio.h>
33
34#define MAX_BD_NUM 1024
35
36/*--------------------------------------------------------------------------*/
37/* Common Definition */
38/*--------------------------------------------------------------------------*/
39#define MSDC_BUS_1BITS 0x0
40#define MSDC_BUS_4BITS 0x1
41#define MSDC_BUS_8BITS 0x2
42
43#define MSDC_BURST_64B 0x6
44
45/*--------------------------------------------------------------------------*/
46/* Register Offset */
47/*--------------------------------------------------------------------------*/
48#define MSDC_CFG 0x0
49#define MSDC_IOCON 0x04
50#define MSDC_PS 0x08
51#define MSDC_INT 0x0c
52#define MSDC_INTEN 0x10
53#define MSDC_FIFOCS 0x14
54#define SDC_CFG 0x30
55#define SDC_CMD 0x34
56#define SDC_ARG 0x38
57#define SDC_STS 0x3c
58#define SDC_RESP0 0x40
59#define SDC_RESP1 0x44
60#define SDC_RESP2 0x48
61#define SDC_RESP3 0x4c
62#define SDC_BLK_NUM 0x50
63#define SDC_ADV_CFG0 0x64
64#define EMMC_IOCON 0x7c
65#define SDC_ACMD_RESP 0x80
66#define DMA_SA_H4BIT 0x8c
67#define MSDC_DMA_SA 0x90
68#define MSDC_DMA_CTRL 0x98
69#define MSDC_DMA_CFG 0x9c
70#define MSDC_PATCH_BIT 0xb0
71#define MSDC_PATCH_BIT1 0xb4
72#define MSDC_PATCH_BIT2 0xb8
73#define MSDC_PAD_TUNE 0xec
74#define MSDC_PAD_TUNE0 0xf0
75#define PAD_DS_TUNE 0x188
76#define PAD_CMD_TUNE 0x18c
77#define EMMC50_CFG0 0x208
78#define EMMC50_CFG3 0x220
79#define SDC_FIFO_CFG 0x228
80
81/*--------------------------------------------------------------------------*/
82/* Top Pad Register Offset */
83/*--------------------------------------------------------------------------*/
84#define EMMC_TOP_CONTROL 0x00
85#define EMMC_TOP_CMD 0x04
86#define EMMC50_PAD_DS_TUNE 0x0c
87
88/*--------------------------------------------------------------------------*/
89/* Register Mask */
90/*--------------------------------------------------------------------------*/
91
92/* MSDC_CFG mask */
93#define MSDC_CFG_MODE (0x1 << 0) /* RW */
94#define MSDC_CFG_CKPDN (0x1 << 1) /* RW */
95#define MSDC_CFG_RST (0x1 << 2) /* RW */
96#define MSDC_CFG_PIO (0x1 << 3) /* RW */
97#define MSDC_CFG_CKDRVEN (0x1 << 4) /* RW */
98#define MSDC_CFG_BV18SDT (0x1 << 5) /* RW */
99#define MSDC_CFG_BV18PSS (0x1 << 6) /* R */
100#define MSDC_CFG_CKSTB (0x1 << 7) /* R */
101#define MSDC_CFG_CKDIV (0xff << 8) /* RW */
102#define MSDC_CFG_CKMOD (0x3 << 16) /* RW */
103#define MSDC_CFG_HS400_CK_MODE (0x1 << 18) /* RW */
104#define MSDC_CFG_HS400_CK_MODE_EXTRA (0x1 << 22) /* RW */
105#define MSDC_CFG_CKDIV_EXTRA (0xfff << 8) /* RW */
106#define MSDC_CFG_CKMOD_EXTRA (0x3 << 20) /* RW */
107
108/* MSDC_IOCON mask */
109#define MSDC_IOCON_SDR104CKS (0x1 << 0) /* RW */
110#define MSDC_IOCON_RSPL (0x1 << 1) /* RW */
111#define MSDC_IOCON_DSPL (0x1 << 2) /* RW */
112#define MSDC_IOCON_DDLSEL (0x1 << 3) /* RW */
113#define MSDC_IOCON_DDR50CKD (0x1 << 4) /* RW */
114#define MSDC_IOCON_DSPLSEL (0x1 << 5) /* RW */
115#define MSDC_IOCON_W_DSPL (0x1 << 8) /* RW */
116#define MSDC_IOCON_D0SPL (0x1 << 16) /* RW */
117#define MSDC_IOCON_D1SPL (0x1 << 17) /* RW */
118#define MSDC_IOCON_D2SPL (0x1 << 18) /* RW */
119#define MSDC_IOCON_D3SPL (0x1 << 19) /* RW */
120#define MSDC_IOCON_D4SPL (0x1 << 20) /* RW */
121#define MSDC_IOCON_D5SPL (0x1 << 21) /* RW */
122#define MSDC_IOCON_D6SPL (0x1 << 22) /* RW */
123#define MSDC_IOCON_D7SPL (0x1 << 23) /* RW */
124#define MSDC_IOCON_RISCSZ (0x3 << 24) /* RW */
125
126/* MSDC_PS mask */
127#define MSDC_PS_CDEN (0x1 << 0) /* RW */
128#define MSDC_PS_CDSTS (0x1 << 1) /* R */
129#define MSDC_PS_CDDEBOUNCE (0xf << 12) /* RW */
130#define MSDC_PS_DAT (0xff << 16) /* R */
131#define MSDC_PS_CMD (0x1 << 24) /* R */
132#define MSDC_PS_WP (0x1 << 31) /* R */
133
134/* MSDC_INT mask */
135#define MSDC_INT_MMCIRQ (0x1 << 0) /* W1C */
136#define MSDC_INT_CDSC (0x1 << 1) /* W1C */
137#define MSDC_INT_ACMDRDY (0x1 << 3) /* W1C */
138#define MSDC_INT_ACMDTMO (0x1 << 4) /* W1C */
139#define MSDC_INT_ACMDCRCERR (0x1 << 5) /* W1C */
140#define MSDC_INT_DMAQ_EMPTY (0x1 << 6) /* W1C */
141#define MSDC_INT_SDIOIRQ (0x1 << 7) /* W1C */
142#define MSDC_INT_CMDRDY (0x1 << 8) /* W1C */
143#define MSDC_INT_CMDTMO (0x1 << 9) /* W1C */
144#define MSDC_INT_RSPCRCERR (0x1 << 10) /* W1C */
145#define MSDC_INT_CSTA (0x1 << 11) /* R */
146#define MSDC_INT_XFER_COMPL (0x1 << 12) /* W1C */
147#define MSDC_INT_DXFER_DONE (0x1 << 13) /* W1C */
148#define MSDC_INT_DATTMO (0x1 << 14) /* W1C */
149#define MSDC_INT_DATCRCERR (0x1 << 15) /* W1C */
150#define MSDC_INT_ACMD19_DONE (0x1 << 16) /* W1C */
151#define MSDC_INT_DMA_BDCSERR (0x1 << 17) /* W1C */
152#define MSDC_INT_DMA_GPDCSERR (0x1 << 18) /* W1C */
153#define MSDC_INT_DMA_PROTECT (0x1 << 19) /* W1C */
154
155/* MSDC_INTEN mask */
156#define MSDC_INTEN_MMCIRQ (0x1 << 0) /* RW */
157#define MSDC_INTEN_CDSC (0x1 << 1) /* RW */
158#define MSDC_INTEN_ACMDRDY (0x1 << 3) /* RW */
159#define MSDC_INTEN_ACMDTMO (0x1 << 4) /* RW */
160#define MSDC_INTEN_ACMDCRCERR (0x1 << 5) /* RW */
161#define MSDC_INTEN_DMAQ_EMPTY (0x1 << 6) /* RW */
162#define MSDC_INTEN_SDIOIRQ (0x1 << 7) /* RW */
163#define MSDC_INTEN_CMDRDY (0x1 << 8) /* RW */
164#define MSDC_INTEN_CMDTMO (0x1 << 9) /* RW */
165#define MSDC_INTEN_RSPCRCERR (0x1 << 10) /* RW */
166#define MSDC_INTEN_CSTA (0x1 << 11) /* RW */
167#define MSDC_INTEN_XFER_COMPL (0x1 << 12) /* RW */
168#define MSDC_INTEN_DXFER_DONE (0x1 << 13) /* RW */
169#define MSDC_INTEN_DATTMO (0x1 << 14) /* RW */
170#define MSDC_INTEN_DATCRCERR (0x1 << 15) /* RW */
171#define MSDC_INTEN_ACMD19_DONE (0x1 << 16) /* RW */
172#define MSDC_INTEN_DMA_BDCSERR (0x1 << 17) /* RW */
173#define MSDC_INTEN_DMA_GPDCSERR (0x1 << 18) /* RW */
174#define MSDC_INTEN_DMA_PROTECT (0x1 << 19) /* RW */
175
176/* MSDC_FIFOCS mask */
177#define MSDC_FIFOCS_RXCNT (0xff << 0) /* R */
178#define MSDC_FIFOCS_TXCNT (0xff << 16) /* R */
179#define MSDC_FIFOCS_CLR (0x1 << 31) /* RW */
180
181/* SDC_CFG mask */
182#define SDC_CFG_SDIOINTWKUP (0x1 << 0) /* RW */
183#define SDC_CFG_INSWKUP (0x1 << 1) /* RW */
184#define SDC_CFG_BUSWIDTH (0x3 << 16) /* RW */
185#define SDC_CFG_SDIO (0x1 << 19) /* RW */
186#define SDC_CFG_SDIOIDE (0x1 << 20) /* RW */
187#define SDC_CFG_INTATGAP (0x1 << 21) /* RW */
188#define SDC_CFG_DTOC (0xff << 24) /* RW */
189
190/* SDC_STS mask */
191#define SDC_STS_SDCBUSY (0x1 << 0) /* RW */
192#define SDC_STS_CMDBUSY (0x1 << 1) /* RW */
193#define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */
194
195#define SDC_DAT1_IRQ_TRIGGER (0x1 << 19) /* RW */
196/* SDC_ADV_CFG0 mask */
197#define SDC_RX_ENHANCE_EN (0x1 << 20) /* RW */
198
199/* DMA_SA_H4BIT mask */
200#define DMA_ADDR_HIGH_4BIT (0xf << 0) /* RW */
201
202/* MSDC_DMA_CTRL mask */
203#define MSDC_DMA_CTRL_START (0x1 << 0) /* W */
204#define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */
205#define MSDC_DMA_CTRL_RESUME (0x1 << 2) /* W */
206#define MSDC_DMA_CTRL_MODE (0x1 << 8) /* RW */
207#define MSDC_DMA_CTRL_LASTBUF (0x1 << 10) /* RW */
208#define MSDC_DMA_CTRL_BRUSTSZ (0x7 << 12) /* RW */
209
210/* MSDC_DMA_CFG mask */
211#define MSDC_DMA_CFG_STS (0x1 << 0) /* R */
212#define MSDC_DMA_CFG_DECSEN (0x1 << 1) /* RW */
213#define MSDC_DMA_CFG_AHBHPROT2 (0x2 << 8) /* RW */
214#define MSDC_DMA_CFG_ACTIVEEN (0x2 << 12) /* RW */
215#define MSDC_DMA_CFG_CS12B16B (0x1 << 16) /* RW */
216
217/* MSDC_PATCH_BIT mask */
218#define MSDC_PATCH_BIT_ODDSUPP (0x1 << 1) /* RW */
219#define MSDC_INT_DAT_LATCH_CK_SEL (0x7 << 7)
220#define MSDC_CKGEN_MSDC_DLY_SEL (0x1f << 10)
221#define MSDC_PATCH_BIT_IODSSEL (0x1 << 16) /* RW */
222#define MSDC_PATCH_BIT_IOINTSEL (0x1 << 17) /* RW */
223#define MSDC_PATCH_BIT_BUSYDLY (0xf << 18) /* RW */
224#define MSDC_PATCH_BIT_WDOD (0xf << 22) /* RW */
225#define MSDC_PATCH_BIT_IDRTSEL (0x1 << 26) /* RW */
226#define MSDC_PATCH_BIT_CMDFSEL (0x1 << 27) /* RW */
227#define MSDC_PATCH_BIT_INTDLSEL (0x1 << 28) /* RW */
228#define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
229#define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
230
231#define MSDC_PATCH_BIT1_STOP_DLY (0xf << 8) /* RW */
232
233#define MSDC_PATCH_BIT2_CFGRESP (0x1 << 15) /* RW */
234#define MSDC_PATCH_BIT2_CFGCRCSTS (0x1 << 28) /* RW */
235#define MSDC_PB2_SUPPORT_64G (0x1 << 1) /* RW */
236#define MSDC_PB2_RESPWAIT (0x3 << 2) /* RW */
237#define MSDC_PB2_RESPSTSENSEL (0x7 << 16) /* RW */
238#define MSDC_PB2_CRCSTSENSEL (0x7 << 29) /* RW */
239
240#define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */
241#define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
242#define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
243#define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */
244#define MSDC_PAD_TUNE_CLKTDLY (0x1f << 27) /* RW */
245#define MSDC_PAD_TUNE_RXDLYSEL (0x1 << 15) /* RW */
246#define MSDC_PAD_TUNE_RD_SEL (0x1 << 13) /* RW */
247#define MSDC_PAD_TUNE_CMD_SEL (0x1 << 21) /* RW */
248
249#define PAD_DS_TUNE_DLY1 (0x1f << 2) /* RW */
250#define PAD_DS_TUNE_DLY2 (0x1f << 7) /* RW */
251#define PAD_DS_TUNE_DLY3 (0x1f << 12) /* RW */
252
253#define PAD_CMD_TUNE_RX_DLY3 (0x1f << 1) /* RW */
254
255#define EMMC50_CFG_PADCMD_LATCHCK (0x1 << 0) /* RW */
256#define EMMC50_CFG_CRCSTS_EDGE (0x1 << 3) /* RW */
257#define EMMC50_CFG_CFCSTS_SEL (0x1 << 4) /* RW */
258
259#define EMMC50_CFG3_OUTS_WR (0x1f << 0) /* RW */
260
261#define SDC_FIFO_CFG_WRVALIDSEL (0x1 << 24) /* RW */
262#define SDC_FIFO_CFG_RDVALIDSEL (0x1 << 25) /* RW */
263
264/* EMMC_TOP_CONTROL mask */
265#define PAD_RXDLY_SEL (0x1 << 0) /* RW */
266#define DELAY_EN (0x1 << 1) /* RW */
267#define PAD_DAT_RD_RXDLY2 (0x1f << 2) /* RW */
268#define PAD_DAT_RD_RXDLY (0x1f << 7) /* RW */
269#define PAD_DAT_RD_RXDLY2_SEL (0x1 << 12) /* RW */
270#define PAD_DAT_RD_RXDLY_SEL (0x1 << 13) /* RW */
271#define DATA_K_VALUE_SEL (0x1 << 14) /* RW */
272#define SDC_RX_ENH_EN (0x1 << 15) /* TW */
273
274/* EMMC_TOP_CMD mask */
275#define PAD_CMD_RXDLY2 (0x1f << 0) /* RW */
276#define PAD_CMD_RXDLY (0x1f << 5) /* RW */
277#define PAD_CMD_RD_RXDLY2_SEL (0x1 << 10) /* RW */
278#define PAD_CMD_RD_RXDLY_SEL (0x1 << 11) /* RW */
279#define PAD_CMD_TX_DLY (0x1f << 12) /* RW */
280
281#define REQ_CMD_EIO (0x1 << 0)
282#define REQ_CMD_TMO (0x1 << 1)
283#define REQ_DAT_ERR (0x1 << 2)
284#define REQ_STOP_EIO (0x1 << 3)
285#define REQ_STOP_TMO (0x1 << 4)
286#define REQ_CMD_BUSY (0x1 << 5)
287
288#define MSDC_PREPARE_FLAG (0x1 << 0)
289#define MSDC_ASYNC_FLAG (0x1 << 1)
290#define MSDC_MMAP_FLAG (0x1 << 2)
291
292#define MTK_MMC_AUTOSUSPEND_DELAY 50
293#define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */
294#define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */
295
296#define DEFAULT_DEBOUNCE (8) /* 8 cycles CD debounce */
297
298#define PAD_DELAY_MAX 32 /* PAD delay cells */
299/*--------------------------------------------------------------------------*/
300/* Descriptor Structure */
301/*--------------------------------------------------------------------------*/
302struct mt_gpdma_desc {
303 u32 gpd_info;
304#define GPDMA_DESC_HWO (0x1 << 0)
305#define GPDMA_DESC_BDP (0x1 << 1)
306#define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
307#define GPDMA_DESC_INT (0x1 << 16)
308#define GPDMA_DESC_NEXT_H4 (0xf << 24)
309#define GPDMA_DESC_PTR_H4 (0xf << 28)
310 u32 next;
311 u32 ptr;
312 u32 gpd_data_len;
313#define GPDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
314#define GPDMA_DESC_EXTLEN (0xff << 16) /* bit16 ~ bit23 */
315 u32 arg;
316 u32 blknum;
317 u32 cmd;
318};
319
320struct mt_bdma_desc {
321 u32 bd_info;
322#define BDMA_DESC_EOL (0x1 << 0)
323#define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
324#define BDMA_DESC_BLKPAD (0x1 << 17)
325#define BDMA_DESC_DWPAD (0x1 << 18)
326#define BDMA_DESC_NEXT_H4 (0xf << 24)
327#define BDMA_DESC_PTR_H4 (0xf << 28)
328 u32 next;
329 u32 ptr;
330 u32 bd_data_len;
331#define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
332#define BDMA_DESC_BUFLEN_EXT (0xffffff) /* bit0 ~ bit23 */
333};
334
335struct msdc_dma {
336 struct scatterlist *sg; /* I/O scatter list */
337 struct mt_gpdma_desc *gpd; /* pointer to gpd array */
338 struct mt_bdma_desc *bd; /* pointer to bd array */
339 dma_addr_t gpd_addr; /* the physical address of gpd array */
340 dma_addr_t bd_addr; /* the physical address of bd array */
341};
342
343struct msdc_save_para {
344 u32 msdc_cfg;
345 u32 iocon;
346 u32 sdc_cfg;
347 u32 pad_tune;
348 u32 patch_bit0;
349 u32 patch_bit1;
350 u32 patch_bit2;
351 u32 pad_ds_tune;
352 u32 pad_cmd_tune;
353 u32 emmc50_cfg0;
354 u32 emmc50_cfg3;
355 u32 sdc_fifo_cfg;
356 u32 emmc_top_control;
357 u32 emmc_top_cmd;
358 u32 emmc50_pad_ds_tune;
359};
360
361struct mtk_mmc_compatible {
362 u8 clk_div_bits;
363 bool hs400_tune; /* only used for MT8173 */
364 u32 pad_tune_reg;
365 bool async_fifo;
366 bool data_tune;
367 bool busy_check;
368 bool stop_clk_fix;
369 bool enhance_rx;
370 bool support_64g;
371 bool use_internal_cd;
372};
373
374struct msdc_tune_para {
375 u32 iocon;
376 u32 pad_tune;
377 u32 pad_cmd_tune;
378 u32 emmc_top_control;
379 u32 emmc_top_cmd;
380};
381
382struct msdc_delay_phase {
383 u8 maxlen;
384 u8 start;
385 u8 final_phase;
386};
387
388struct msdc_host {
389 struct device *dev;
390 const struct mtk_mmc_compatible *dev_comp;
391 struct mmc_host *mmc; /* mmc structure */
392 int cmd_rsp;
393
394 spinlock_t lock;
395 struct mmc_request *mrq;
396 struct mmc_command *cmd;
397 struct mmc_data *data;
398 int error;
399
400 void __iomem *base; /* host base address */
401 void __iomem *top_base; /* host top register base address */
402
403 struct msdc_dma dma; /* dma channel */
404 u64 dma_mask;
405
406 u32 timeout_ns; /* data timeout ns */
407 u32 timeout_clks; /* data timeout clks */
408
409 struct pinctrl *pinctrl;
410 struct pinctrl_state *pins_default;
411 struct pinctrl_state *pins_uhs;
412 struct delayed_work req_timeout;
413 int irq; /* host interrupt */
414
415 struct clk *src_clk; /* msdc source clock */
416 struct clk *h_clk; /* msdc h_clk */
417 struct clk *bus_clk; /* bus clock which used to access register */
418 struct clk *src_clk_cg; /* msdc source clock control gate */
419 u32 mclk; /* mmc subsystem clock frequency */
420 u32 src_clk_freq; /* source clock frequency */
421 unsigned char timing;
422 bool vqmmc_enabled;
423 u32 latch_ck;
424 u32 hs400_ds_delay;
425 u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */
426 u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */
427 bool hs400_cmd_resp_sel_rising;
428 /* cmd response sample selection for HS400 */
429 bool hs400_mode; /* current eMMC will run at hs400 mode */
430 bool internal_cd; /* Use internal card-detect logic */
431 struct msdc_save_para save_para; /* used when gate HCLK */
432 struct msdc_tune_para def_tune_para; /* default tune setting */
433 struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
434};
435
436static const struct mtk_mmc_compatible mt8135_compat = {
437 .clk_div_bits = 8,
438 .hs400_tune = false,
439 .pad_tune_reg = MSDC_PAD_TUNE,
440 .async_fifo = false,
441 .data_tune = false,
442 .busy_check = false,
443 .stop_clk_fix = false,
444 .enhance_rx = false,
445 .support_64g = false,
446};
447
448static const struct mtk_mmc_compatible mt8173_compat = {
449 .clk_div_bits = 8,
450 .hs400_tune = true,
451 .pad_tune_reg = MSDC_PAD_TUNE,
452 .async_fifo = false,
453 .data_tune = false,
454 .busy_check = false,
455 .stop_clk_fix = false,
456 .enhance_rx = false,
457 .support_64g = false,
458};
459
460static const struct mtk_mmc_compatible mt8183_compat = {
461 .clk_div_bits = 12,
462 .hs400_tune = false,
463 .pad_tune_reg = MSDC_PAD_TUNE0,
464 .async_fifo = true,
465 .data_tune = true,
466 .busy_check = true,
467 .stop_clk_fix = true,
468 .enhance_rx = true,
469 .support_64g = true,
470};
471
472static const struct mtk_mmc_compatible mt2701_compat = {
473 .clk_div_bits = 12,
474 .hs400_tune = false,
475 .pad_tune_reg = MSDC_PAD_TUNE0,
476 .async_fifo = true,
477 .data_tune = true,
478 .busy_check = false,
479 .stop_clk_fix = false,
480 .enhance_rx = false,
481 .support_64g = false,
482};
483
484static const struct mtk_mmc_compatible mt2712_compat = {
485 .clk_div_bits = 12,
486 .hs400_tune = false,
487 .pad_tune_reg = MSDC_PAD_TUNE0,
488 .async_fifo = true,
489 .data_tune = true,
490 .busy_check = true,
491 .stop_clk_fix = true,
492 .enhance_rx = true,
493 .support_64g = true,
494};
495
496static const struct mtk_mmc_compatible mt7622_compat = {
497 .clk_div_bits = 12,
498 .hs400_tune = false,
499 .pad_tune_reg = MSDC_PAD_TUNE0,
500 .async_fifo = true,
501 .data_tune = true,
502 .busy_check = true,
503 .stop_clk_fix = true,
504 .enhance_rx = true,
505 .support_64g = false,
506};
507
508static const struct mtk_mmc_compatible mt8516_compat = {
509 .clk_div_bits = 12,
510 .hs400_tune = false,
511 .pad_tune_reg = MSDC_PAD_TUNE0,
512 .async_fifo = true,
513 .data_tune = true,
514 .busy_check = true,
515 .stop_clk_fix = true,
516};
517
518static const struct mtk_mmc_compatible mt7620_compat = {
519 .clk_div_bits = 8,
520 .hs400_tune = false,
521 .pad_tune_reg = MSDC_PAD_TUNE,
522 .async_fifo = false,
523 .data_tune = false,
524 .busy_check = false,
525 .stop_clk_fix = false,
526 .enhance_rx = false,
527 .use_internal_cd = true,
528};
529
530static const struct of_device_id msdc_of_ids[] = {
531 { .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
532 { .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
533 { .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
534 { .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
535 { .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
536 { .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
537 { .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
538 { .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
539 {}
540};
541MODULE_DEVICE_TABLE(of, msdc_of_ids);
542
543static void sdr_set_bits(void __iomem *reg, u32 bs)
544{
545 u32 val = readl(reg);
546
547 val |= bs;
548 writel(val, reg);
549}
550
551static void sdr_clr_bits(void __iomem *reg, u32 bs)
552{
553 u32 val = readl(reg);
554
555 val &= ~bs;
556 writel(val, reg);
557}
558
559static void sdr_set_field(void __iomem *reg, u32 field, u32 val)
560{
561 unsigned int tv = readl(reg);
562
563 tv &= ~field;
564 tv |= ((val) << (ffs((unsigned int)field) - 1));
565 writel(tv, reg);
566}
567
568static void sdr_get_field(void __iomem *reg, u32 field, u32 *val)
569{
570 unsigned int tv = readl(reg);
571
572 *val = ((tv & field) >> (ffs((unsigned int)field) - 1));
573}
574
575static void msdc_reset_hw(struct msdc_host *host)
576{
577 u32 val;
578
579 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
580 while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST)
581 cpu_relax();
582
583 sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
584 while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR)
585 cpu_relax();
586
587 val = readl(host->base + MSDC_INT);
588 writel(val, host->base + MSDC_INT);
589}
590
591static void msdc_cmd_next(struct msdc_host *host,
592 struct mmc_request *mrq, struct mmc_command *cmd);
593
594static const u32 cmd_ints_mask = MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR |
595 MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY |
596 MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO;
597static const u32 data_ints_mask = MSDC_INTEN_XFER_COMPL | MSDC_INTEN_DATTMO |
598 MSDC_INTEN_DATCRCERR | MSDC_INTEN_DMA_BDCSERR |
599 MSDC_INTEN_DMA_GPDCSERR | MSDC_INTEN_DMA_PROTECT;
600
601static u8 msdc_dma_calcs(u8 *buf, u32 len)
602{
603 u32 i, sum = 0;
604
605 for (i = 0; i < len; i++)
606 sum += buf[i];
607 return 0xff - (u8) sum;
608}
609
610static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
611 struct mmc_data *data)
612{
613 unsigned int j, dma_len;
614 dma_addr_t dma_address;
615 u32 dma_ctrl;
616 struct scatterlist *sg;
617 struct mt_gpdma_desc *gpd;
618 struct mt_bdma_desc *bd;
619
620 sg = data->sg;
621
622 gpd = dma->gpd;
623 bd = dma->bd;
624
625 /* modify gpd */
626 gpd->gpd_info |= GPDMA_DESC_HWO;
627 gpd->gpd_info |= GPDMA_DESC_BDP;
628 /* need to clear first. use these bits to calc checksum */
629 gpd->gpd_info &= ~GPDMA_DESC_CHECKSUM;
630 gpd->gpd_info |= msdc_dma_calcs((u8 *) gpd, 16) << 8;
631
632 /* modify bd */
633 for_each_sg(data->sg, sg, data->sg_count, j) {
634 dma_address = sg_dma_address(sg);
635 dma_len = sg_dma_len(sg);
636
637 /* init bd */
638 bd[j].bd_info &= ~BDMA_DESC_BLKPAD;
639 bd[j].bd_info &= ~BDMA_DESC_DWPAD;
640 bd[j].ptr = lower_32_bits(dma_address);
641 if (host->dev_comp->support_64g) {
642 bd[j].bd_info &= ~BDMA_DESC_PTR_H4;
643 bd[j].bd_info |= (upper_32_bits(dma_address) & 0xf)
644 << 28;
645 }
646
647 if (host->dev_comp->support_64g) {
648 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN_EXT;
649 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN_EXT);
650 } else {
651 bd[j].bd_data_len &= ~BDMA_DESC_BUFLEN;
652 bd[j].bd_data_len |= (dma_len & BDMA_DESC_BUFLEN);
653 }
654
655 if (j == data->sg_count - 1) /* the last bd */
656 bd[j].bd_info |= BDMA_DESC_EOL;
657 else
658 bd[j].bd_info &= ~BDMA_DESC_EOL;
659
660 /* checksume need to clear first */
661 bd[j].bd_info &= ~BDMA_DESC_CHECKSUM;
662 bd[j].bd_info |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8;
663 }
664
665 sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
666 dma_ctrl = readl_relaxed(host->base + MSDC_DMA_CTRL);
667 dma_ctrl &= ~(MSDC_DMA_CTRL_BRUSTSZ | MSDC_DMA_CTRL_MODE);
668 dma_ctrl |= (MSDC_BURST_64B << 12 | 1 << 8);
669 writel_relaxed(dma_ctrl, host->base + MSDC_DMA_CTRL);
670 if (host->dev_comp->support_64g)
671 sdr_set_field(host->base + DMA_SA_H4BIT, DMA_ADDR_HIGH_4BIT,
672 upper_32_bits(dma->gpd_addr) & 0xf);
673 writel(lower_32_bits(dma->gpd_addr), host->base + MSDC_DMA_SA);
674}
675
676static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq)
677{
678 struct mmc_data *data = mrq->data;
679
680 if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
681 data->host_cookie |= MSDC_PREPARE_FLAG;
682 data->sg_count = dma_map_sg(host->dev, data->sg, data->sg_len,
683 mmc_get_dma_dir(data));
684 }
685}
686
687static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq)
688{
689 struct mmc_data *data = mrq->data;
690
691 if (data->host_cookie & MSDC_ASYNC_FLAG)
692 return;
693
694 if (data->host_cookie & MSDC_PREPARE_FLAG) {
695 dma_unmap_sg(host->dev, data->sg, data->sg_len,
696 mmc_get_dma_dir(data));
697 data->host_cookie &= ~MSDC_PREPARE_FLAG;
698 }
699}
700
701/* clock control primitives */
702static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
703{
704 u32 timeout, clk_ns;
705 u32 mode = 0;
706
707 host->timeout_ns = ns;
708 host->timeout_clks = clks;
709 if (host->mmc->actual_clock == 0) {
710 timeout = 0;
711 } else {
712 clk_ns = 1000000000UL / host->mmc->actual_clock;
713 timeout = (ns + clk_ns - 1) / clk_ns + clks;
714 /* in 1048576 sclk cycle unit */
715 timeout = (timeout + (0x1 << 20) - 1) >> 20;
716 if (host->dev_comp->clk_div_bits == 8)
717 sdr_get_field(host->base + MSDC_CFG,
718 MSDC_CFG_CKMOD, &mode);
719 else
720 sdr_get_field(host->base + MSDC_CFG,
721 MSDC_CFG_CKMOD_EXTRA, &mode);
722 /*DDR mode will double the clk cycles for data timeout */
723 timeout = mode >= 2 ? timeout * 2 : timeout;
724 timeout = timeout > 1 ? timeout - 1 : 0;
725 timeout = timeout > 255 ? 255 : timeout;
726 }
727 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout);
728}
729
730static void msdc_gate_clock(struct msdc_host *host)
731{
732 clk_disable_unprepare(host->src_clk_cg);
733 clk_disable_unprepare(host->src_clk);
734 clk_disable_unprepare(host->bus_clk);
735 clk_disable_unprepare(host->h_clk);
736}
737
738static void msdc_ungate_clock(struct msdc_host *host)
739{
740 clk_prepare_enable(host->h_clk);
741 clk_prepare_enable(host->bus_clk);
742 clk_prepare_enable(host->src_clk);
743 clk_prepare_enable(host->src_clk_cg);
744 while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
745 cpu_relax();
746}
747
748static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
749{
750 u32 mode;
751 u32 flags;
752 u32 div;
753 u32 sclk;
754 u32 tune_reg = host->dev_comp->pad_tune_reg;
755
756 if (!hz) {
757 dev_dbg(host->dev, "set mclk to 0\n");
758 host->mclk = 0;
759 host->mmc->actual_clock = 0;
760 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
761 return;
762 }
763
764 flags = readl(host->base + MSDC_INTEN);
765 sdr_clr_bits(host->base + MSDC_INTEN, flags);
766 if (host->dev_comp->clk_div_bits == 8)
767 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_HS400_CK_MODE);
768 else
769 sdr_clr_bits(host->base + MSDC_CFG,
770 MSDC_CFG_HS400_CK_MODE_EXTRA);
771 if (timing == MMC_TIMING_UHS_DDR50 ||
772 timing == MMC_TIMING_MMC_DDR52 ||
773 timing == MMC_TIMING_MMC_HS400) {
774 if (timing == MMC_TIMING_MMC_HS400)
775 mode = 0x3;
776 else
777 mode = 0x2; /* ddr mode and use divisor */
778
779 if (hz >= (host->src_clk_freq >> 2)) {
780 div = 0; /* mean div = 1/4 */
781 sclk = host->src_clk_freq >> 2; /* sclk = clk / 4 */
782 } else {
783 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
784 sclk = (host->src_clk_freq >> 2) / div;
785 div = (div >> 1);
786 }
787
788 if (timing == MMC_TIMING_MMC_HS400 &&
789 hz >= (host->src_clk_freq >> 1)) {
790 if (host->dev_comp->clk_div_bits == 8)
791 sdr_set_bits(host->base + MSDC_CFG,
792 MSDC_CFG_HS400_CK_MODE);
793 else
794 sdr_set_bits(host->base + MSDC_CFG,
795 MSDC_CFG_HS400_CK_MODE_EXTRA);
796 sclk = host->src_clk_freq >> 1;
797 div = 0; /* div is ignore when bit18 is set */
798 }
799 } else if (hz >= host->src_clk_freq) {
800 mode = 0x1; /* no divisor */
801 div = 0;
802 sclk = host->src_clk_freq;
803 } else {
804 mode = 0x0; /* use divisor */
805 if (hz >= (host->src_clk_freq >> 1)) {
806 div = 0; /* mean div = 1/2 */
807 sclk = host->src_clk_freq >> 1; /* sclk = clk / 2 */
808 } else {
809 div = (host->src_clk_freq + ((hz << 2) - 1)) / (hz << 2);
810 sclk = (host->src_clk_freq >> 2) / div;
811 }
812 }
813 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
814 /*
815 * As src_clk/HCLK use the same bit to gate/ungate,
816 * So if want to only gate src_clk, need gate its parent(mux).
817 */
818 if (host->src_clk_cg)
819 clk_disable_unprepare(host->src_clk_cg);
820 else
821 clk_disable_unprepare(clk_get_parent(host->src_clk));
822 if (host->dev_comp->clk_div_bits == 8)
823 sdr_set_field(host->base + MSDC_CFG,
824 MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
825 (mode << 8) | div);
826 else
827 sdr_set_field(host->base + MSDC_CFG,
828 MSDC_CFG_CKMOD_EXTRA | MSDC_CFG_CKDIV_EXTRA,
829 (mode << 12) | div);
830 if (host->src_clk_cg)
831 clk_prepare_enable(host->src_clk_cg);
832 else
833 clk_prepare_enable(clk_get_parent(host->src_clk));
834
835 while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
836 cpu_relax();
837 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
838 host->mmc->actual_clock = sclk;
839 host->mclk = hz;
840 host->timing = timing;
841 /* need because clk changed. */
842 msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
843 sdr_set_bits(host->base + MSDC_INTEN, flags);
844
845 /*
846 * mmc_select_hs400() will drop to 50Mhz and High speed mode,
847 * tune result of hs200/200Mhz is not suitable for 50Mhz
848 */
849 if (host->mmc->actual_clock <= 52000000) {
850 writel(host->def_tune_para.iocon, host->base + MSDC_IOCON);
851 if (host->top_base) {
852 writel(host->def_tune_para.emmc_top_control,
853 host->top_base + EMMC_TOP_CONTROL);
854 writel(host->def_tune_para.emmc_top_cmd,
855 host->top_base + EMMC_TOP_CMD);
856 } else {
857 writel(host->def_tune_para.pad_tune,
858 host->base + tune_reg);
859 }
860 } else {
861 writel(host->saved_tune_para.iocon, host->base + MSDC_IOCON);
862 writel(host->saved_tune_para.pad_cmd_tune,
863 host->base + PAD_CMD_TUNE);
864 if (host->top_base) {
865 writel(host->saved_tune_para.emmc_top_control,
866 host->top_base + EMMC_TOP_CONTROL);
867 writel(host->saved_tune_para.emmc_top_cmd,
868 host->top_base + EMMC_TOP_CMD);
869 } else {
870 writel(host->saved_tune_para.pad_tune,
871 host->base + tune_reg);
872 }
873 }
874
875 if (timing == MMC_TIMING_MMC_HS400 &&
876 host->dev_comp->hs400_tune)
877 sdr_set_field(host->base + tune_reg,
878 MSDC_PAD_TUNE_CMDRRDLY,
879 host->hs400_cmd_int_delay);
880 dev_dbg(host->dev, "sclk: %d, timing: %d\n", host->mmc->actual_clock,
881 timing);
882}
883
884static inline u32 msdc_cmd_find_resp(struct msdc_host *host,
885 struct mmc_request *mrq, struct mmc_command *cmd)
886{
887 u32 resp;
888
889 switch (mmc_resp_type(cmd)) {
890 /* Actually, R1, R5, R6, R7 are the same */
891 case MMC_RSP_R1:
892 resp = 0x1;
893 break;
894 case MMC_RSP_R1B:
895 resp = 0x7;
896 break;
897 case MMC_RSP_R2:
898 resp = 0x2;
899 break;
900 case MMC_RSP_R3:
901 resp = 0x3;
902 break;
903 case MMC_RSP_NONE:
904 default:
905 resp = 0x0;
906 break;
907 }
908
909 return resp;
910}
911
912static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
913 struct mmc_request *mrq, struct mmc_command *cmd)
914{
915 /* rawcmd :
916 * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
917 * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
918 */
919 u32 opcode = cmd->opcode;
920 u32 resp = msdc_cmd_find_resp(host, mrq, cmd);
921 u32 rawcmd = (opcode & 0x3f) | ((resp & 0x7) << 7);
922
923 host->cmd_rsp = resp;
924
925 if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) ||
926 opcode == MMC_STOP_TRANSMISSION)
927 rawcmd |= (0x1 << 14);
928 else if (opcode == SD_SWITCH_VOLTAGE)
929 rawcmd |= (0x1 << 30);
930 else if (opcode == SD_APP_SEND_SCR ||
931 opcode == SD_APP_SEND_NUM_WR_BLKS ||
932 (opcode == SD_SWITCH && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
933 (opcode == SD_APP_SD_STATUS && mmc_cmd_type(cmd) == MMC_CMD_ADTC) ||
934 (opcode == MMC_SEND_EXT_CSD && mmc_cmd_type(cmd) == MMC_CMD_ADTC))
935 rawcmd |= (0x1 << 11);
936
937 if (cmd->data) {
938 struct mmc_data *data = cmd->data;
939
940 if (mmc_op_multi(opcode)) {
941 if (mmc_card_mmc(host->mmc->card) && mrq->sbc &&
942 !(mrq->sbc->arg & 0xFFFF0000))
943 rawcmd |= 0x2 << 28; /* AutoCMD23 */
944 }
945
946 rawcmd |= ((data->blksz & 0xFFF) << 16);
947 if (data->flags & MMC_DATA_WRITE)
948 rawcmd |= (0x1 << 13);
949 if (data->blocks > 1)
950 rawcmd |= (0x2 << 11);
951 else
952 rawcmd |= (0x1 << 11);
953 /* Always use dma mode */
954 sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO);
955
956 if (host->timeout_ns != data->timeout_ns ||
957 host->timeout_clks != data->timeout_clks)
958 msdc_set_timeout(host, data->timeout_ns,
959 data->timeout_clks);
960
961 writel(data->blocks, host->base + SDC_BLK_NUM);
962 }
963 return rawcmd;
964}
965
966static void msdc_start_data(struct msdc_host *host, struct mmc_request *mrq,
967 struct mmc_command *cmd, struct mmc_data *data)
968{
969 bool read;
970
971 WARN_ON(host->data);
972 host->data = data;
973 read = data->flags & MMC_DATA_READ;
974
975 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
976 msdc_dma_setup(host, &host->dma, data);
977 sdr_set_bits(host->base + MSDC_INTEN, data_ints_mask);
978 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
979 dev_dbg(host->dev, "DMA start\n");
980 dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n",
981 __func__, cmd->opcode, data->blocks, read);
982}
983
984static int msdc_auto_cmd_done(struct msdc_host *host, int events,
985 struct mmc_command *cmd)
986{
987 u32 *rsp = cmd->resp;
988
989 rsp[0] = readl(host->base + SDC_ACMD_RESP);
990
991 if (events & MSDC_INT_ACMDRDY) {
992 cmd->error = 0;
993 } else {
994 msdc_reset_hw(host);
995 if (events & MSDC_INT_ACMDCRCERR) {
996 cmd->error = -EILSEQ;
997 host->error |= REQ_STOP_EIO;
998 } else if (events & MSDC_INT_ACMDTMO) {
999 cmd->error = -ETIMEDOUT;
1000 host->error |= REQ_STOP_TMO;
1001 }
1002 dev_err(host->dev,
1003 "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n",
1004 __func__, cmd->opcode, cmd->arg, rsp[0], cmd->error);
1005 }
1006 return cmd->error;
1007}
1008
1009static void msdc_track_cmd_data(struct msdc_host *host,
1010 struct mmc_command *cmd, struct mmc_data *data)
1011{
1012 if (host->error)
1013 dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n",
1014 __func__, cmd->opcode, cmd->arg, host->error);
1015}
1016
1017static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
1018{
1019 unsigned long flags;
1020 bool ret;
1021
1022 ret = cancel_delayed_work(&host->req_timeout);
1023 if (!ret) {
1024 /* delay work already running */
1025 return;
1026 }
1027 spin_lock_irqsave(&host->lock, flags);
1028 host->mrq = NULL;
1029 spin_unlock_irqrestore(&host->lock, flags);
1030
1031 msdc_track_cmd_data(host, mrq->cmd, mrq->data);
1032 if (mrq->data)
1033 msdc_unprepare_data(host, mrq);
1034 if (host->error)
1035 msdc_reset_hw(host);
1036 mmc_request_done(host->mmc, mrq);
1037}
1038
1039/* returns true if command is fully handled; returns false otherwise */
1040static bool msdc_cmd_done(struct msdc_host *host, int events,
1041 struct mmc_request *mrq, struct mmc_command *cmd)
1042{
1043 bool done = false;
1044 bool sbc_error;
1045 unsigned long flags;
1046 u32 *rsp = cmd->resp;
1047
1048 if (mrq->sbc && cmd == mrq->cmd &&
1049 (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR
1050 | MSDC_INT_ACMDTMO)))
1051 msdc_auto_cmd_done(host, events, mrq->sbc);
1052
1053 sbc_error = mrq->sbc && mrq->sbc->error;
1054
1055 if (!sbc_error && !(events & (MSDC_INT_CMDRDY
1056 | MSDC_INT_RSPCRCERR
1057 | MSDC_INT_CMDTMO)))
1058 return done;
1059
1060 spin_lock_irqsave(&host->lock, flags);
1061 done = !host->cmd;
1062 host->cmd = NULL;
1063 spin_unlock_irqrestore(&host->lock, flags);
1064
1065 if (done)
1066 return true;
1067
1068 sdr_clr_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1069
1070 if (cmd->flags & MMC_RSP_PRESENT) {
1071 if (cmd->flags & MMC_RSP_136) {
1072 rsp[0] = readl(host->base + SDC_RESP3);
1073 rsp[1] = readl(host->base + SDC_RESP2);
1074 rsp[2] = readl(host->base + SDC_RESP1);
1075 rsp[3] = readl(host->base + SDC_RESP0);
1076 } else {
1077 rsp[0] = readl(host->base + SDC_RESP0);
1078 }
1079 }
1080
1081 if (!sbc_error && !(events & MSDC_INT_CMDRDY)) {
1082 if (events & MSDC_INT_CMDTMO ||
1083 (cmd->opcode != MMC_SEND_TUNING_BLOCK &&
1084 cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200))
1085 /*
1086 * should not clear fifo/interrupt as the tune data
1087 * may have alreay come when cmd19/cmd21 gets response
1088 * CRC error.
1089 */
1090 msdc_reset_hw(host);
1091 if (events & MSDC_INT_RSPCRCERR) {
1092 cmd->error = -EILSEQ;
1093 host->error |= REQ_CMD_EIO;
1094 } else if (events & MSDC_INT_CMDTMO) {
1095 cmd->error = -ETIMEDOUT;
1096 host->error |= REQ_CMD_TMO;
1097 }
1098 }
1099 if (cmd->error)
1100 dev_dbg(host->dev,
1101 "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n",
1102 __func__, cmd->opcode, cmd->arg, rsp[0],
1103 cmd->error);
1104
1105 msdc_cmd_next(host, mrq, cmd);
1106 return true;
1107}
1108
1109/* It is the core layer's responsibility to ensure card status
1110 * is correct before issue a request. but host design do below
1111 * checks recommended.
1112 */
1113static inline bool msdc_cmd_is_ready(struct msdc_host *host,
1114 struct mmc_request *mrq, struct mmc_command *cmd)
1115{
1116 /* The max busy time we can endure is 20ms */
1117 unsigned long tmo = jiffies + msecs_to_jiffies(20);
1118
1119 while ((readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) &&
1120 time_before(jiffies, tmo))
1121 cpu_relax();
1122 if (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) {
1123 dev_err(host->dev, "CMD bus busy detected\n");
1124 host->error |= REQ_CMD_BUSY;
1125 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1126 return false;
1127 }
1128
1129 if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
1130 tmo = jiffies + msecs_to_jiffies(20);
1131 /* R1B or with data, should check SDCBUSY */
1132 while ((readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) &&
1133 time_before(jiffies, tmo))
1134 cpu_relax();
1135 if (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) {
1136 dev_err(host->dev, "Controller busy detected\n");
1137 host->error |= REQ_CMD_BUSY;
1138 msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
1139 return false;
1140 }
1141 }
1142 return true;
1143}
1144
1145static void msdc_start_command(struct msdc_host *host,
1146 struct mmc_request *mrq, struct mmc_command *cmd)
1147{
1148 u32 rawcmd;
1149 unsigned long flags;
1150
1151 WARN_ON(host->cmd);
1152 host->cmd = cmd;
1153
1154 mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
1155 if (!msdc_cmd_is_ready(host, mrq, cmd))
1156 return;
1157
1158 if ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16 ||
1159 readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) {
1160 dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n");
1161 msdc_reset_hw(host);
1162 }
1163
1164 cmd->error = 0;
1165 rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
1166
1167 spin_lock_irqsave(&host->lock, flags);
1168 sdr_set_bits(host->base + MSDC_INTEN, cmd_ints_mask);
1169 spin_unlock_irqrestore(&host->lock, flags);
1170
1171 writel(cmd->arg, host->base + SDC_ARG);
1172 writel(rawcmd, host->base + SDC_CMD);
1173}
1174
1175static void msdc_cmd_next(struct msdc_host *host,
1176 struct mmc_request *mrq, struct mmc_command *cmd)
1177{
1178 if ((cmd->error &&
1179 !(cmd->error == -EILSEQ &&
1180 (cmd->opcode == MMC_SEND_TUNING_BLOCK ||
1181 cmd->opcode == MMC_SEND_TUNING_BLOCK_HS200))) ||
1182 (mrq->sbc && mrq->sbc->error))
1183 msdc_request_done(host, mrq);
1184 else if (cmd == mrq->sbc)
1185 msdc_start_command(host, mrq, mrq->cmd);
1186 else if (!cmd->data)
1187 msdc_request_done(host, mrq);
1188 else
1189 msdc_start_data(host, mrq, cmd, cmd->data);
1190}
1191
1192static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
1193{
1194 struct msdc_host *host = mmc_priv(mmc);
1195
1196 host->error = 0;
1197 WARN_ON(host->mrq);
1198 host->mrq = mrq;
1199
1200 if (mrq->data)
1201 msdc_prepare_data(host, mrq);
1202
1203 /* if SBC is required, we have HW option and SW option.
1204 * if HW option is enabled, and SBC does not have "special" flags,
1205 * use HW option, otherwise use SW option
1206 */
1207 if (mrq->sbc && (!mmc_card_mmc(mmc->card) ||
1208 (mrq->sbc->arg & 0xFFFF0000)))
1209 msdc_start_command(host, mrq, mrq->sbc);
1210 else
1211 msdc_start_command(host, mrq, mrq->cmd);
1212}
1213
1214static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq)
1215{
1216 struct msdc_host *host = mmc_priv(mmc);
1217 struct mmc_data *data = mrq->data;
1218
1219 if (!data)
1220 return;
1221
1222 msdc_prepare_data(host, mrq);
1223 data->host_cookie |= MSDC_ASYNC_FLAG;
1224}
1225
1226static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1227 int err)
1228{
1229 struct msdc_host *host = mmc_priv(mmc);
1230 struct mmc_data *data;
1231
1232 data = mrq->data;
1233 if (!data)
1234 return;
1235 if (data->host_cookie) {
1236 data->host_cookie &= ~MSDC_ASYNC_FLAG;
1237 msdc_unprepare_data(host, mrq);
1238 }
1239}
1240
1241static void msdc_data_xfer_next(struct msdc_host *host,
1242 struct mmc_request *mrq, struct mmc_data *data)
1243{
1244 if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error &&
1245 !mrq->sbc)
1246 msdc_start_command(host, mrq, mrq->stop);
1247 else
1248 msdc_request_done(host, mrq);
1249}
1250
1251static bool msdc_data_xfer_done(struct msdc_host *host, u32 events,
1252 struct mmc_request *mrq, struct mmc_data *data)
1253{
1254 struct mmc_command *stop = data->stop;
1255 unsigned long flags;
1256 bool done;
1257 unsigned int check_data = events &
1258 (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
1259 | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
1260 | MSDC_INT_DMA_PROTECT);
1261
1262 spin_lock_irqsave(&host->lock, flags);
1263 done = !host->data;
1264 if (check_data)
1265 host->data = NULL;
1266 spin_unlock_irqrestore(&host->lock, flags);
1267
1268 if (done)
1269 return true;
1270
1271 if (check_data || (stop && stop->error)) {
1272 dev_dbg(host->dev, "DMA status: 0x%8X\n",
1273 readl(host->base + MSDC_DMA_CFG));
1274 sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
1275 1);
1276 while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
1277 cpu_relax();
1278 sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask);
1279 dev_dbg(host->dev, "DMA stop\n");
1280
1281 if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) {
1282 data->bytes_xfered = data->blocks * data->blksz;
1283 } else {
1284 dev_dbg(host->dev, "interrupt events: %x\n", events);
1285 msdc_reset_hw(host);
1286 host->error |= REQ_DAT_ERR;
1287 data->bytes_xfered = 0;
1288
1289 if (events & MSDC_INT_DATTMO)
1290 data->error = -ETIMEDOUT;
1291 else if (events & MSDC_INT_DATCRCERR)
1292 data->error = -EILSEQ;
1293
1294 dev_dbg(host->dev, "%s: cmd=%d; blocks=%d",
1295 __func__, mrq->cmd->opcode, data->blocks);
1296 dev_dbg(host->dev, "data_error=%d xfer_size=%d\n",
1297 (int)data->error, data->bytes_xfered);
1298 }
1299
1300 msdc_data_xfer_next(host, mrq, data);
1301 done = true;
1302 }
1303 return done;
1304}
1305
1306static void msdc_set_buswidth(struct msdc_host *host, u32 width)
1307{
1308 u32 val = readl(host->base + SDC_CFG);
1309
1310 val &= ~SDC_CFG_BUSWIDTH;
1311
1312 switch (width) {
1313 default:
1314 case MMC_BUS_WIDTH_1:
1315 val |= (MSDC_BUS_1BITS << 16);
1316 break;
1317 case MMC_BUS_WIDTH_4:
1318 val |= (MSDC_BUS_4BITS << 16);
1319 break;
1320 case MMC_BUS_WIDTH_8:
1321 val |= (MSDC_BUS_8BITS << 16);
1322 break;
1323 }
1324
1325 writel(val, host->base + SDC_CFG);
1326 dev_dbg(host->dev, "Bus Width = %d", width);
1327}
1328
1329static int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
1330{
1331 struct msdc_host *host = mmc_priv(mmc);
1332 int ret = 0;
1333
1334 if (!IS_ERR(mmc->supply.vqmmc)) {
1335 if (ios->signal_voltage != MMC_SIGNAL_VOLTAGE_330 &&
1336 ios->signal_voltage != MMC_SIGNAL_VOLTAGE_180) {
1337 dev_err(host->dev, "Unsupported signal voltage!\n");
1338 return -EINVAL;
1339 }
1340
1341 ret = mmc_regulator_set_vqmmc(mmc, ios);
1342 if (ret) {
1343 dev_dbg(host->dev, "Regulator set error %d (%d)\n",
1344 ret, ios->signal_voltage);
1345 } else {
1346 /* Apply different pinctrl settings for different signal voltage */
1347 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)
1348 pinctrl_select_state(host->pinctrl, host->pins_uhs);
1349 else
1350 pinctrl_select_state(host->pinctrl, host->pins_default);
1351 }
1352 }
1353 return ret;
1354}
1355
1356static int msdc_card_busy(struct mmc_host *mmc)
1357{
1358 struct msdc_host *host = mmc_priv(mmc);
1359 u32 status = readl(host->base + MSDC_PS);
1360
1361 /* only check if data0 is low */
1362 return !(status & BIT(16));
1363}
1364
1365static void msdc_request_timeout(struct work_struct *work)
1366{
1367 struct msdc_host *host = container_of(work, struct msdc_host,
1368 req_timeout.work);
1369
1370 /* simulate HW timeout status */
1371 dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__);
1372 if (host->mrq) {
1373 dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__,
1374 host->mrq, host->mrq->cmd->opcode);
1375 if (host->cmd) {
1376 dev_err(host->dev, "%s: aborting cmd=%d\n",
1377 __func__, host->cmd->opcode);
1378 msdc_cmd_done(host, MSDC_INT_CMDTMO, host->mrq,
1379 host->cmd);
1380 } else if (host->data) {
1381 dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n",
1382 __func__, host->mrq->cmd->opcode,
1383 host->data->blocks);
1384 msdc_data_xfer_done(host, MSDC_INT_DATTMO, host->mrq,
1385 host->data);
1386 }
1387 }
1388}
1389
1390static void __msdc_enable_sdio_irq(struct msdc_host *host, int enb)
1391{
1392 if (enb) {
1393 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1394 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1395 } else {
1396 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_SDIOIRQ);
1397 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1398 }
1399}
1400
1401static void msdc_enable_sdio_irq(struct mmc_host *mmc, int enb)
1402{
1403 unsigned long flags;
1404 struct msdc_host *host = mmc_priv(mmc);
1405
1406 spin_lock_irqsave(&host->lock, flags);
1407 __msdc_enable_sdio_irq(host, enb);
1408 spin_unlock_irqrestore(&host->lock, flags);
1409
1410 if (enb)
1411 pm_runtime_get_noresume(host->dev);
1412 else
1413 pm_runtime_put_noidle(host->dev);
1414}
1415
1416static irqreturn_t msdc_irq(int irq, void *dev_id)
1417{
1418 struct msdc_host *host = (struct msdc_host *) dev_id;
1419
1420 while (true) {
1421 unsigned long flags;
1422 struct mmc_request *mrq;
1423 struct mmc_command *cmd;
1424 struct mmc_data *data;
1425 u32 events, event_mask;
1426
1427 spin_lock_irqsave(&host->lock, flags);
1428 events = readl(host->base + MSDC_INT);
1429 event_mask = readl(host->base + MSDC_INTEN);
1430 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
1431 __msdc_enable_sdio_irq(host, 0);
1432 /* clear interrupts */
1433 writel(events & event_mask, host->base + MSDC_INT);
1434
1435 mrq = host->mrq;
1436 cmd = host->cmd;
1437 data = host->data;
1438 spin_unlock_irqrestore(&host->lock, flags);
1439
1440 if ((events & event_mask) & MSDC_INT_SDIOIRQ)
1441 sdio_signal_irq(host->mmc);
1442
1443 if ((events & event_mask) & MSDC_INT_CDSC) {
1444 if (host->internal_cd)
1445 mmc_detect_change(host->mmc, msecs_to_jiffies(20));
1446 events &= ~MSDC_INT_CDSC;
1447 }
1448
1449 if (!(events & (event_mask & ~MSDC_INT_SDIOIRQ)))
1450 break;
1451
1452 if (!mrq) {
1453 dev_err(host->dev,
1454 "%s: MRQ=NULL; events=%08X; event_mask=%08X\n",
1455 __func__, events, event_mask);
1456 WARN_ON(1);
1457 break;
1458 }
1459
1460 dev_dbg(host->dev, "%s: events=%08X\n", __func__, events);
1461
1462 if (cmd)
1463 msdc_cmd_done(host, events, mrq, cmd);
1464 else if (data)
1465 msdc_data_xfer_done(host, events, mrq, data);
1466 }
1467
1468 return IRQ_HANDLED;
1469}
1470
1471static void msdc_init_hw(struct msdc_host *host)
1472{
1473 u32 val;
1474 u32 tune_reg = host->dev_comp->pad_tune_reg;
1475
1476 /* Configure to MMC/SD mode, clock free running */
1477 sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
1478
1479 /* Reset */
1480 msdc_reset_hw(host);
1481
1482 /* Disable and clear all interrupts */
1483 writel(0, host->base + MSDC_INTEN);
1484 val = readl(host->base + MSDC_INT);
1485 writel(val, host->base + MSDC_INT);
1486
1487 /* Configure card detection */
1488 if (host->internal_cd) {
1489 sdr_set_field(host->base + MSDC_PS, MSDC_PS_CDDEBOUNCE,
1490 DEFAULT_DEBOUNCE);
1491 sdr_set_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1492 sdr_set_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1493 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1494 } else {
1495 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1496 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1497 sdr_clr_bits(host->base + MSDC_INTEN, MSDC_INTEN_CDSC);
1498 }
1499
1500 if (host->top_base) {
1501 writel(0, host->top_base + EMMC_TOP_CONTROL);
1502 writel(0, host->top_base + EMMC_TOP_CMD);
1503 } else {
1504 writel(0, host->base + tune_reg);
1505 }
1506 writel(0, host->base + MSDC_IOCON);
1507 sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 0);
1508 writel(0x403c0046, host->base + MSDC_PATCH_BIT);
1509 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
1510 writel(0xffff4089, host->base + MSDC_PATCH_BIT1);
1511 sdr_set_bits(host->base + EMMC50_CFG0, EMMC50_CFG_CFCSTS_SEL);
1512
1513 if (host->dev_comp->stop_clk_fix) {
1514 sdr_set_field(host->base + MSDC_PATCH_BIT1,
1515 MSDC_PATCH_BIT1_STOP_DLY, 3);
1516 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1517 SDC_FIFO_CFG_WRVALIDSEL);
1518 sdr_clr_bits(host->base + SDC_FIFO_CFG,
1519 SDC_FIFO_CFG_RDVALIDSEL);
1520 }
1521
1522 if (host->dev_comp->busy_check)
1523 sdr_clr_bits(host->base + MSDC_PATCH_BIT1, (1 << 7));
1524
1525 if (host->dev_comp->async_fifo) {
1526 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1527 MSDC_PB2_RESPWAIT, 3);
1528 if (host->dev_comp->enhance_rx) {
1529 if (host->top_base)
1530 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1531 SDC_RX_ENH_EN);
1532 else
1533 sdr_set_bits(host->base + SDC_ADV_CFG0,
1534 SDC_RX_ENHANCE_EN);
1535 } else {
1536 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1537 MSDC_PB2_RESPSTSENSEL, 2);
1538 sdr_set_field(host->base + MSDC_PATCH_BIT2,
1539 MSDC_PB2_CRCSTSENSEL, 2);
1540 }
1541 /* use async fifo, then no need tune internal delay */
1542 sdr_clr_bits(host->base + MSDC_PATCH_BIT2,
1543 MSDC_PATCH_BIT2_CFGRESP);
1544 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1545 MSDC_PATCH_BIT2_CFGCRCSTS);
1546 }
1547
1548 if (host->dev_comp->support_64g)
1549 sdr_set_bits(host->base + MSDC_PATCH_BIT2,
1550 MSDC_PB2_SUPPORT_64G);
1551 if (host->dev_comp->data_tune) {
1552 if (host->top_base) {
1553 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1554 PAD_DAT_RD_RXDLY_SEL);
1555 sdr_clr_bits(host->top_base + EMMC_TOP_CONTROL,
1556 DATA_K_VALUE_SEL);
1557 sdr_set_bits(host->top_base + EMMC_TOP_CMD,
1558 PAD_CMD_RD_RXDLY_SEL);
1559 } else {
1560 sdr_set_bits(host->base + tune_reg,
1561 MSDC_PAD_TUNE_RD_SEL |
1562 MSDC_PAD_TUNE_CMD_SEL);
1563 }
1564 } else {
1565 /* choose clock tune */
1566 if (host->top_base)
1567 sdr_set_bits(host->top_base + EMMC_TOP_CONTROL,
1568 PAD_RXDLY_SEL);
1569 else
1570 sdr_set_bits(host->base + tune_reg,
1571 MSDC_PAD_TUNE_RXDLYSEL);
1572 }
1573
1574 /* Configure to enable SDIO mode.
1575 * it's must otherwise sdio cmd5 failed
1576 */
1577 sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
1578
1579 /* Config SDIO device detect interrupt function */
1580 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
1581 sdr_set_bits(host->base + SDC_ADV_CFG0, SDC_DAT1_IRQ_TRIGGER);
1582
1583 /* Configure to default data timeout */
1584 sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, 3);
1585
1586 host->def_tune_para.iocon = readl(host->base + MSDC_IOCON);
1587 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
1588 if (host->top_base) {
1589 host->def_tune_para.emmc_top_control =
1590 readl(host->top_base + EMMC_TOP_CONTROL);
1591 host->def_tune_para.emmc_top_cmd =
1592 readl(host->top_base + EMMC_TOP_CMD);
1593 host->saved_tune_para.emmc_top_control =
1594 readl(host->top_base + EMMC_TOP_CONTROL);
1595 host->saved_tune_para.emmc_top_cmd =
1596 readl(host->top_base + EMMC_TOP_CMD);
1597 } else {
1598 host->def_tune_para.pad_tune = readl(host->base + tune_reg);
1599 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
1600 }
1601 dev_dbg(host->dev, "init hardware done!");
1602}
1603
1604static void msdc_deinit_hw(struct msdc_host *host)
1605{
1606 u32 val;
1607
1608 if (host->internal_cd) {
1609 /* Disabled card-detect */
1610 sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
1611 sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_INSWKUP);
1612 }
1613
1614 /* Disable and clear all interrupts */
1615 writel(0, host->base + MSDC_INTEN);
1616
1617 val = readl(host->base + MSDC_INT);
1618 writel(val, host->base + MSDC_INT);
1619}
1620
1621/* init gpd and bd list in msdc_drv_probe */
1622static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
1623{
1624 struct mt_gpdma_desc *gpd = dma->gpd;
1625 struct mt_bdma_desc *bd = dma->bd;
1626 dma_addr_t dma_addr;
1627 int i;
1628
1629 memset(gpd, 0, sizeof(struct mt_gpdma_desc) * 2);
1630
1631 dma_addr = dma->gpd_addr + sizeof(struct mt_gpdma_desc);
1632 gpd->gpd_info = GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
1633 /* gpd->next is must set for desc DMA
1634 * That's why must alloc 2 gpd structure.
1635 */
1636 gpd->next = lower_32_bits(dma_addr);
1637 if (host->dev_comp->support_64g)
1638 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1639
1640 dma_addr = dma->bd_addr;
1641 gpd->ptr = lower_32_bits(dma->bd_addr); /* physical address */
1642 if (host->dev_comp->support_64g)
1643 gpd->gpd_info |= (upper_32_bits(dma_addr) & 0xf) << 28;
1644
1645 memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_NUM);
1646 for (i = 0; i < (MAX_BD_NUM - 1); i++) {
1647 dma_addr = dma->bd_addr + sizeof(*bd) * (i + 1);
1648 bd[i].next = lower_32_bits(dma_addr);
1649 if (host->dev_comp->support_64g)
1650 bd[i].bd_info |= (upper_32_bits(dma_addr) & 0xf) << 24;
1651 }
1652}
1653
1654static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1655{
1656 struct msdc_host *host = mmc_priv(mmc);
1657 int ret;
1658
1659 msdc_set_buswidth(host, ios->bus_width);
1660
1661 /* Suspend/Resume will do power off/on */
1662 switch (ios->power_mode) {
1663 case MMC_POWER_UP:
1664 if (!IS_ERR(mmc->supply.vmmc)) {
1665 msdc_init_hw(host);
1666 ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc,
1667 ios->vdd);
1668 if (ret) {
1669 dev_err(host->dev, "Failed to set vmmc power!\n");
1670 return;
1671 }
1672 }
1673 break;
1674 case MMC_POWER_ON:
1675 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) {
1676 ret = regulator_enable(mmc->supply.vqmmc);
1677 if (ret)
1678 dev_err(host->dev, "Failed to set vqmmc power!\n");
1679 else
1680 host->vqmmc_enabled = true;
1681 }
1682 break;
1683 case MMC_POWER_OFF:
1684 if (!IS_ERR(mmc->supply.vmmc))
1685 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
1686
1687 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) {
1688 regulator_disable(mmc->supply.vqmmc);
1689 host->vqmmc_enabled = false;
1690 }
1691 break;
1692 default:
1693 break;
1694 }
1695
1696 if (host->mclk != ios->clock || host->timing != ios->timing)
1697 msdc_set_mclk(host, ios->timing, ios->clock);
1698}
1699
1700static u32 test_delay_bit(u32 delay, u32 bit)
1701{
1702 bit %= PAD_DELAY_MAX;
1703 return delay & (1 << bit);
1704}
1705
1706static int get_delay_len(u32 delay, u32 start_bit)
1707{
1708 int i;
1709
1710 for (i = 0; i < (PAD_DELAY_MAX - start_bit); i++) {
1711 if (test_delay_bit(delay, start_bit + i) == 0)
1712 return i;
1713 }
1714 return PAD_DELAY_MAX - start_bit;
1715}
1716
1717static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
1718{
1719 int start = 0, len = 0;
1720 int start_final = 0, len_final = 0;
1721 u8 final_phase = 0xff;
1722 struct msdc_delay_phase delay_phase = { 0, };
1723
1724 if (delay == 0) {
1725 dev_err(host->dev, "phase error: [map:%x]\n", delay);
1726 delay_phase.final_phase = final_phase;
1727 return delay_phase;
1728 }
1729
1730 while (start < PAD_DELAY_MAX) {
1731 len = get_delay_len(delay, start);
1732 if (len_final < len) {
1733 start_final = start;
1734 len_final = len;
1735 }
1736 start += len ? len : 1;
1737 if (len >= 12 && start_final < 4)
1738 break;
1739 }
1740
1741 /* The rule is that to find the smallest delay cell */
1742 if (start_final == 0)
1743 final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
1744 else
1745 final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
1746 dev_info(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
1747 delay, len_final, final_phase);
1748
1749 delay_phase.maxlen = len_final;
1750 delay_phase.start = start_final;
1751 delay_phase.final_phase = final_phase;
1752 return delay_phase;
1753}
1754
1755static inline void msdc_set_cmd_delay(struct msdc_host *host, u32 value)
1756{
1757 u32 tune_reg = host->dev_comp->pad_tune_reg;
1758
1759 if (host->top_base)
1760 sdr_set_field(host->top_base + EMMC_TOP_CMD, PAD_CMD_RXDLY,
1761 value);
1762 else
1763 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRDLY,
1764 value);
1765}
1766
1767static inline void msdc_set_data_delay(struct msdc_host *host, u32 value)
1768{
1769 u32 tune_reg = host->dev_comp->pad_tune_reg;
1770
1771 if (host->top_base)
1772 sdr_set_field(host->top_base + EMMC_TOP_CONTROL,
1773 PAD_DAT_RD_RXDLY, value);
1774 else
1775 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_DATRRDLY,
1776 value);
1777}
1778
1779static int msdc_tune_response(struct mmc_host *mmc, u32 opcode)
1780{
1781 struct msdc_host *host = mmc_priv(mmc);
1782 u32 rise_delay = 0, fall_delay = 0;
1783 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1784 struct msdc_delay_phase internal_delay_phase;
1785 u8 final_delay, final_maxlen;
1786 u32 internal_delay = 0;
1787 u32 tune_reg = host->dev_comp->pad_tune_reg;
1788 int cmd_err;
1789 int i, j;
1790
1791 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1792 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1793 sdr_set_field(host->base + tune_reg,
1794 MSDC_PAD_TUNE_CMDRRDLY,
1795 host->hs200_cmd_int_delay);
1796
1797 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1798 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1799 msdc_set_cmd_delay(host, i);
1800 /*
1801 * Using the same parameters, it may sometimes pass the test,
1802 * but sometimes it may fail. To make sure the parameters are
1803 * more stable, we test each set of parameters 3 times.
1804 */
1805 for (j = 0; j < 3; j++) {
1806 mmc_send_tuning(mmc, opcode, &cmd_err);
1807 if (!cmd_err) {
1808 rise_delay |= (1 << i);
1809 } else {
1810 rise_delay &= ~(1 << i);
1811 break;
1812 }
1813 }
1814 }
1815 final_rise_delay = get_best_delay(host, rise_delay);
1816 /* if rising edge has enough margin, then do not scan falling edge */
1817 if (final_rise_delay.maxlen >= 12 ||
1818 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1819 goto skip_fall;
1820
1821 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1822 for (i = 0; i < PAD_DELAY_MAX; i++) {
1823 msdc_set_cmd_delay(host, i);
1824 /*
1825 * Using the same parameters, it may sometimes pass the test,
1826 * but sometimes it may fail. To make sure the parameters are
1827 * more stable, we test each set of parameters 3 times.
1828 */
1829 for (j = 0; j < 3; j++) {
1830 mmc_send_tuning(mmc, opcode, &cmd_err);
1831 if (!cmd_err) {
1832 fall_delay |= (1 << i);
1833 } else {
1834 fall_delay &= ~(1 << i);
1835 break;
1836 }
1837 }
1838 }
1839 final_fall_delay = get_best_delay(host, fall_delay);
1840
1841skip_fall:
1842 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
1843 if (final_fall_delay.maxlen >= 12 && final_fall_delay.start < 4)
1844 final_maxlen = final_fall_delay.maxlen;
1845 if (final_maxlen == final_rise_delay.maxlen) {
1846 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1847 final_delay = final_rise_delay.final_phase;
1848 } else {
1849 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1850 final_delay = final_fall_delay.final_phase;
1851 }
1852 msdc_set_cmd_delay(host, final_delay);
1853
1854 if (host->dev_comp->async_fifo || host->hs200_cmd_int_delay)
1855 goto skip_internal;
1856
1857 for (i = 0; i < PAD_DELAY_MAX; i++) {
1858 sdr_set_field(host->base + tune_reg,
1859 MSDC_PAD_TUNE_CMDRRDLY, i);
1860 mmc_send_tuning(mmc, opcode, &cmd_err);
1861 if (!cmd_err)
1862 internal_delay |= (1 << i);
1863 }
1864 dev_dbg(host->dev, "Final internal delay: 0x%x\n", internal_delay);
1865 internal_delay_phase = get_best_delay(host, internal_delay);
1866 sdr_set_field(host->base + tune_reg, MSDC_PAD_TUNE_CMDRRDLY,
1867 internal_delay_phase.final_phase);
1868skip_internal:
1869 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
1870 return final_delay == 0xff ? -EIO : 0;
1871}
1872
1873static int hs400_tune_response(struct mmc_host *mmc, u32 opcode)
1874{
1875 struct msdc_host *host = mmc_priv(mmc);
1876 u32 cmd_delay = 0;
1877 struct msdc_delay_phase final_cmd_delay = { 0,};
1878 u8 final_delay;
1879 int cmd_err;
1880 int i, j;
1881
1882 /* select EMMC50 PAD CMD tune */
1883 sdr_set_bits(host->base + PAD_CMD_TUNE, BIT(0));
1884
1885 if (mmc->ios.timing == MMC_TIMING_MMC_HS200 ||
1886 mmc->ios.timing == MMC_TIMING_UHS_SDR104)
1887 sdr_set_field(host->base + MSDC_PAD_TUNE,
1888 MSDC_PAD_TUNE_CMDRRDLY,
1889 host->hs200_cmd_int_delay);
1890
1891 if (host->hs400_cmd_resp_sel_rising)
1892 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1893 else
1894 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1895 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1896 sdr_set_field(host->base + PAD_CMD_TUNE,
1897 PAD_CMD_TUNE_RX_DLY3, i);
1898 /*
1899 * Using the same parameters, it may sometimes pass the test,
1900 * but sometimes it may fail. To make sure the parameters are
1901 * more stable, we test each set of parameters 3 times.
1902 */
1903 for (j = 0; j < 3; j++) {
1904 mmc_send_tuning(mmc, opcode, &cmd_err);
1905 if (!cmd_err) {
1906 cmd_delay |= (1 << i);
1907 } else {
1908 cmd_delay &= ~(1 << i);
1909 break;
1910 }
1911 }
1912 }
1913 final_cmd_delay = get_best_delay(host, cmd_delay);
1914 sdr_set_field(host->base + PAD_CMD_TUNE, PAD_CMD_TUNE_RX_DLY3,
1915 final_cmd_delay.final_phase);
1916 final_delay = final_cmd_delay.final_phase;
1917
1918 dev_dbg(host->dev, "Final cmd pad delay: %x\n", final_delay);
1919 return final_delay == 0xff ? -EIO : 0;
1920}
1921
1922static int msdc_tune_data(struct mmc_host *mmc, u32 opcode)
1923{
1924 struct msdc_host *host = mmc_priv(mmc);
1925 u32 rise_delay = 0, fall_delay = 0;
1926 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1927 u8 final_delay, final_maxlen;
1928 int i, ret;
1929
1930 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
1931 host->latch_ck);
1932 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1933 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1934 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1935 msdc_set_data_delay(host, i);
1936 ret = mmc_send_tuning(mmc, opcode, NULL);
1937 if (!ret)
1938 rise_delay |= (1 << i);
1939 }
1940 final_rise_delay = get_best_delay(host, rise_delay);
1941 /* if rising edge has enough margin, then do not scan falling edge */
1942 if (final_rise_delay.maxlen >= 12 ||
1943 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
1944 goto skip_fall;
1945
1946 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1947 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1948 for (i = 0; i < PAD_DELAY_MAX; i++) {
1949 msdc_set_data_delay(host, i);
1950 ret = mmc_send_tuning(mmc, opcode, NULL);
1951 if (!ret)
1952 fall_delay |= (1 << i);
1953 }
1954 final_fall_delay = get_best_delay(host, fall_delay);
1955
1956skip_fall:
1957 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
1958 if (final_maxlen == final_rise_delay.maxlen) {
1959 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1960 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1961 final_delay = final_rise_delay.final_phase;
1962 } else {
1963 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL);
1964 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL);
1965 final_delay = final_fall_delay.final_phase;
1966 }
1967 msdc_set_data_delay(host, final_delay);
1968
1969 dev_dbg(host->dev, "Final data pad delay: %x\n", final_delay);
1970 return final_delay == 0xff ? -EIO : 0;
1971}
1972
1973/*
1974 * MSDC IP which supports data tune + async fifo can do CMD/DAT tune
1975 * together, which can save the tuning time.
1976 */
1977static int msdc_tune_together(struct mmc_host *mmc, u32 opcode)
1978{
1979 struct msdc_host *host = mmc_priv(mmc);
1980 u32 rise_delay = 0, fall_delay = 0;
1981 struct msdc_delay_phase final_rise_delay, final_fall_delay = { 0,};
1982 u8 final_delay, final_maxlen;
1983 int i, ret;
1984
1985 sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL,
1986 host->latch_ck);
1987
1988 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
1989 sdr_clr_bits(host->base + MSDC_IOCON,
1990 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
1991 for (i = 0 ; i < PAD_DELAY_MAX; i++) {
1992 msdc_set_cmd_delay(host, i);
1993 msdc_set_data_delay(host, i);
1994 ret = mmc_send_tuning(mmc, opcode, NULL);
1995 if (!ret)
1996 rise_delay |= (1 << i);
1997 }
1998 final_rise_delay = get_best_delay(host, rise_delay);
1999 /* if rising edge has enough margin, then do not scan falling edge */
2000 if (final_rise_delay.maxlen >= 12 ||
2001 (final_rise_delay.start == 0 && final_rise_delay.maxlen >= 4))
2002 goto skip_fall;
2003
2004 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2005 sdr_set_bits(host->base + MSDC_IOCON,
2006 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2007 for (i = 0; i < PAD_DELAY_MAX; i++) {
2008 msdc_set_cmd_delay(host, i);
2009 msdc_set_data_delay(host, i);
2010 ret = mmc_send_tuning(mmc, opcode, NULL);
2011 if (!ret)
2012 fall_delay |= (1 << i);
2013 }
2014 final_fall_delay = get_best_delay(host, fall_delay);
2015
2016skip_fall:
2017 final_maxlen = max(final_rise_delay.maxlen, final_fall_delay.maxlen);
2018 if (final_maxlen == final_rise_delay.maxlen) {
2019 sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2020 sdr_clr_bits(host->base + MSDC_IOCON,
2021 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2022 final_delay = final_rise_delay.final_phase;
2023 } else {
2024 sdr_set_bits(host->base + MSDC_IOCON, MSDC_IOCON_RSPL);
2025 sdr_set_bits(host->base + MSDC_IOCON,
2026 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2027 final_delay = final_fall_delay.final_phase;
2028 }
2029
2030 msdc_set_cmd_delay(host, final_delay);
2031 msdc_set_data_delay(host, final_delay);
2032
2033 dev_dbg(host->dev, "Final pad delay: %x\n", final_delay);
2034 return final_delay == 0xff ? -EIO : 0;
2035}
2036
2037static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
2038{
2039 struct msdc_host *host = mmc_priv(mmc);
2040 int ret;
2041 u32 tune_reg = host->dev_comp->pad_tune_reg;
2042
2043 if (host->dev_comp->data_tune && host->dev_comp->async_fifo) {
2044 ret = msdc_tune_together(mmc, opcode);
2045 if (host->hs400_mode) {
2046 sdr_clr_bits(host->base + MSDC_IOCON,
2047 MSDC_IOCON_DSPL | MSDC_IOCON_W_DSPL);
2048 msdc_set_data_delay(host, 0);
2049 }
2050 goto tune_done;
2051 }
2052 if (host->hs400_mode &&
2053 host->dev_comp->hs400_tune)
2054 ret = hs400_tune_response(mmc, opcode);
2055 else
2056 ret = msdc_tune_response(mmc, opcode);
2057 if (ret == -EIO) {
2058 dev_err(host->dev, "Tune response fail!\n");
2059 return ret;
2060 }
2061 if (host->hs400_mode == false) {
2062 ret = msdc_tune_data(mmc, opcode);
2063 if (ret == -EIO)
2064 dev_err(host->dev, "Tune data fail!\n");
2065 }
2066
2067tune_done:
2068 host->saved_tune_para.iocon = readl(host->base + MSDC_IOCON);
2069 host->saved_tune_para.pad_tune = readl(host->base + tune_reg);
2070 host->saved_tune_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2071 if (host->top_base) {
2072 host->saved_tune_para.emmc_top_control = readl(host->top_base +
2073 EMMC_TOP_CONTROL);
2074 host->saved_tune_para.emmc_top_cmd = readl(host->top_base +
2075 EMMC_TOP_CMD);
2076 }
2077 return ret;
2078}
2079
2080static int msdc_prepare_hs400_tuning(struct mmc_host *mmc, struct mmc_ios *ios)
2081{
2082 struct msdc_host *host = mmc_priv(mmc);
2083 host->hs400_mode = true;
2084
2085 if (host->top_base)
2086 writel(host->hs400_ds_delay,
2087 host->top_base + EMMC50_PAD_DS_TUNE);
2088 else
2089 writel(host->hs400_ds_delay, host->base + PAD_DS_TUNE);
2090 /* hs400 mode must set it to 0 */
2091 sdr_clr_bits(host->base + MSDC_PATCH_BIT2, MSDC_PATCH_BIT2_CFGCRCSTS);
2092 /* to improve read performance, set outstanding to 2 */
2093 sdr_set_field(host->base + EMMC50_CFG3, EMMC50_CFG3_OUTS_WR, 2);
2094
2095 return 0;
2096}
2097
2098static void msdc_hw_reset(struct mmc_host *mmc)
2099{
2100 struct msdc_host *host = mmc_priv(mmc);
2101
2102 sdr_set_bits(host->base + EMMC_IOCON, 1);
2103 udelay(10); /* 10us is enough */
2104 sdr_clr_bits(host->base + EMMC_IOCON, 1);
2105}
2106
2107static void msdc_ack_sdio_irq(struct mmc_host *mmc)
2108{
2109 unsigned long flags;
2110 struct msdc_host *host = mmc_priv(mmc);
2111
2112 spin_lock_irqsave(&host->lock, flags);
2113 __msdc_enable_sdio_irq(host, 1);
2114 spin_unlock_irqrestore(&host->lock, flags);
2115}
2116
2117static int msdc_get_cd(struct mmc_host *mmc)
2118{
2119 struct msdc_host *host = mmc_priv(mmc);
2120 int val;
2121
2122 if (mmc->caps & MMC_CAP_NONREMOVABLE)
2123 return 1;
2124
2125 if (!host->internal_cd)
2126 return mmc_gpio_get_cd(mmc);
2127
2128 val = readl(host->base + MSDC_PS) & MSDC_PS_CDSTS;
2129 if (mmc->caps2 & MMC_CAP2_CD_ACTIVE_HIGH)
2130 return !!val;
2131 else
2132 return !val;
2133}
2134
2135static const struct mmc_host_ops mt_msdc_ops = {
2136 .post_req = msdc_post_req,
2137 .pre_req = msdc_pre_req,
2138 .request = msdc_ops_request,
2139 .set_ios = msdc_ops_set_ios,
2140 .get_ro = mmc_gpio_get_ro,
2141 .get_cd = msdc_get_cd,
2142 .enable_sdio_irq = msdc_enable_sdio_irq,
2143 .ack_sdio_irq = msdc_ack_sdio_irq,
2144 .start_signal_voltage_switch = msdc_ops_switch_volt,
2145 .card_busy = msdc_card_busy,
2146 .execute_tuning = msdc_execute_tuning,
2147 .prepare_hs400_tuning = msdc_prepare_hs400_tuning,
2148 .hw_reset = msdc_hw_reset,
2149};
2150
2151static void msdc_of_property_parse(struct platform_device *pdev,
2152 struct msdc_host *host)
2153{
2154 of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck",
2155 &host->latch_ck);
2156
2157 of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay",
2158 &host->hs400_ds_delay);
2159
2160 of_property_read_u32(pdev->dev.of_node, "mediatek,hs200-cmd-int-delay",
2161 &host->hs200_cmd_int_delay);
2162
2163 of_property_read_u32(pdev->dev.of_node, "mediatek,hs400-cmd-int-delay",
2164 &host->hs400_cmd_int_delay);
2165
2166 if (of_property_read_bool(pdev->dev.of_node,
2167 "mediatek,hs400-cmd-resp-sel-rising"))
2168 host->hs400_cmd_resp_sel_rising = true;
2169 else
2170 host->hs400_cmd_resp_sel_rising = false;
2171}
2172
2173static int msdc_drv_probe(struct platform_device *pdev)
2174{
2175 struct mmc_host *mmc;
2176 struct msdc_host *host;
2177 struct resource *res;
2178 int ret;
2179
2180 if (!pdev->dev.of_node) {
2181 dev_err(&pdev->dev, "No DT found\n");
2182 return -EINVAL;
2183 }
2184
2185 /* Allocate MMC host for this device */
2186 mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
2187 if (!mmc)
2188 return -ENOMEM;
2189
2190 host = mmc_priv(mmc);
2191 ret = mmc_of_parse(mmc);
2192 if (ret)
2193 goto host_free;
2194
2195 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2196 host->base = devm_ioremap_resource(&pdev->dev, res);
2197 if (IS_ERR(host->base)) {
2198 ret = PTR_ERR(host->base);
2199 goto host_free;
2200 }
2201
2202 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2203 if (res) {
2204 host->top_base = devm_ioremap_resource(&pdev->dev, res);
2205 if (IS_ERR(host->top_base))
2206 host->top_base = NULL;
2207 }
2208
2209 ret = mmc_regulator_get_supply(mmc);
2210 if (ret)
2211 goto host_free;
2212
2213 host->src_clk = devm_clk_get(&pdev->dev, "source");
2214 if (IS_ERR(host->src_clk)) {
2215 ret = PTR_ERR(host->src_clk);
2216 goto host_free;
2217 }
2218
2219 host->h_clk = devm_clk_get(&pdev->dev, "hclk");
2220 if (IS_ERR(host->h_clk)) {
2221 ret = PTR_ERR(host->h_clk);
2222 goto host_free;
2223 }
2224
2225 host->bus_clk = devm_clk_get(&pdev->dev, "bus_clk");
2226 if (IS_ERR(host->bus_clk))
2227 host->bus_clk = NULL;
2228 /*source clock control gate is optional clock*/
2229 host->src_clk_cg = devm_clk_get(&pdev->dev, "source_cg");
2230 if (IS_ERR(host->src_clk_cg))
2231 host->src_clk_cg = NULL;
2232
2233 host->irq = platform_get_irq(pdev, 0);
2234 if (host->irq < 0) {
2235 ret = -EINVAL;
2236 goto host_free;
2237 }
2238
2239 host->pinctrl = devm_pinctrl_get(&pdev->dev);
2240 if (IS_ERR(host->pinctrl)) {
2241 ret = PTR_ERR(host->pinctrl);
2242 dev_err(&pdev->dev, "Cannot find pinctrl!\n");
2243 goto host_free;
2244 }
2245
2246 host->pins_default = pinctrl_lookup_state(host->pinctrl, "default");
2247 if (IS_ERR(host->pins_default)) {
2248 ret = PTR_ERR(host->pins_default);
2249 dev_err(&pdev->dev, "Cannot find pinctrl default!\n");
2250 goto host_free;
2251 }
2252
2253 host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
2254 if (IS_ERR(host->pins_uhs)) {
2255 ret = PTR_ERR(host->pins_uhs);
2256 dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n");
2257 goto host_free;
2258 }
2259
2260 msdc_of_property_parse(pdev, host);
2261
2262 host->dev = &pdev->dev;
2263 host->dev_comp = of_device_get_match_data(&pdev->dev);
2264 host->mmc = mmc;
2265 host->src_clk_freq = clk_get_rate(host->src_clk);
2266 /* Set host parameters to mmc */
2267 mmc->ops = &mt_msdc_ops;
2268 if (host->dev_comp->clk_div_bits == 8)
2269 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 255);
2270 else
2271 mmc->f_min = DIV_ROUND_UP(host->src_clk_freq, 4 * 4095);
2272
2273 if (!(mmc->caps & MMC_CAP_NONREMOVABLE) &&
2274 !mmc_can_gpio_cd(mmc) &&
2275 host->dev_comp->use_internal_cd) {
2276 /*
2277 * Is removable but no GPIO declared, so
2278 * use internal functionality.
2279 */
2280 host->internal_cd = true;
2281 }
2282
2283 if (mmc->caps & MMC_CAP_SDIO_IRQ)
2284 mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD;
2285
2286 mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23;
2287 /* MMC core transfer sizes tunable parameters */
2288 mmc->max_segs = MAX_BD_NUM;
2289 if (host->dev_comp->support_64g)
2290 mmc->max_seg_size = BDMA_DESC_BUFLEN_EXT;
2291 else
2292 mmc->max_seg_size = BDMA_DESC_BUFLEN;
2293 mmc->max_blk_size = 2048;
2294 mmc->max_req_size = 512 * 1024;
2295 mmc->max_blk_count = mmc->max_req_size / 512;
2296 if (host->dev_comp->support_64g)
2297 host->dma_mask = DMA_BIT_MASK(36);
2298 else
2299 host->dma_mask = DMA_BIT_MASK(32);
2300 mmc_dev(mmc)->dma_mask = &host->dma_mask;
2301
2302 host->timeout_clks = 3 * 1048576;
2303 host->dma.gpd = dma_alloc_coherent(&pdev->dev,
2304 2 * sizeof(struct mt_gpdma_desc),
2305 &host->dma.gpd_addr, GFP_KERNEL);
2306 host->dma.bd = dma_alloc_coherent(&pdev->dev,
2307 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2308 &host->dma.bd_addr, GFP_KERNEL);
2309 if (!host->dma.gpd || !host->dma.bd) {
2310 ret = -ENOMEM;
2311 goto release_mem;
2312 }
2313 msdc_init_gpd_bd(host, &host->dma);
2314 INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout);
2315 spin_lock_init(&host->lock);
2316
2317 platform_set_drvdata(pdev, mmc);
2318 msdc_ungate_clock(host);
2319 msdc_init_hw(host);
2320
2321 ret = devm_request_irq(&pdev->dev, host->irq, msdc_irq,
2322 IRQF_TRIGGER_NONE, pdev->name, host);
2323 if (ret)
2324 goto release;
2325
2326 pm_runtime_set_active(host->dev);
2327 pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY);
2328 pm_runtime_use_autosuspend(host->dev);
2329 pm_runtime_enable(host->dev);
2330 ret = mmc_add_host(mmc);
2331
2332 if (ret)
2333 goto end;
2334
2335 return 0;
2336end:
2337 pm_runtime_disable(host->dev);
2338release:
2339 platform_set_drvdata(pdev, NULL);
2340 msdc_deinit_hw(host);
2341 msdc_gate_clock(host);
2342release_mem:
2343 if (host->dma.gpd)
2344 dma_free_coherent(&pdev->dev,
2345 2 * sizeof(struct mt_gpdma_desc),
2346 host->dma.gpd, host->dma.gpd_addr);
2347 if (host->dma.bd)
2348 dma_free_coherent(&pdev->dev,
2349 MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2350 host->dma.bd, host->dma.bd_addr);
2351host_free:
2352 mmc_free_host(mmc);
2353
2354 return ret;
2355}
2356
2357static int msdc_drv_remove(struct platform_device *pdev)
2358{
2359 struct mmc_host *mmc;
2360 struct msdc_host *host;
2361
2362 mmc = platform_get_drvdata(pdev);
2363 host = mmc_priv(mmc);
2364
2365 pm_runtime_get_sync(host->dev);
2366
2367 platform_set_drvdata(pdev, NULL);
2368 mmc_remove_host(host->mmc);
2369 msdc_deinit_hw(host);
2370 msdc_gate_clock(host);
2371
2372 pm_runtime_disable(host->dev);
2373 pm_runtime_put_noidle(host->dev);
2374 dma_free_coherent(&pdev->dev,
2375 2 * sizeof(struct mt_gpdma_desc),
2376 host->dma.gpd, host->dma.gpd_addr);
2377 dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
2378 host->dma.bd, host->dma.bd_addr);
2379
2380 mmc_free_host(host->mmc);
2381
2382 return 0;
2383}
2384
2385#ifdef CONFIG_PM
2386static void msdc_save_reg(struct msdc_host *host)
2387{
2388 u32 tune_reg = host->dev_comp->pad_tune_reg;
2389
2390 host->save_para.msdc_cfg = readl(host->base + MSDC_CFG);
2391 host->save_para.iocon = readl(host->base + MSDC_IOCON);
2392 host->save_para.sdc_cfg = readl(host->base + SDC_CFG);
2393 host->save_para.patch_bit0 = readl(host->base + MSDC_PATCH_BIT);
2394 host->save_para.patch_bit1 = readl(host->base + MSDC_PATCH_BIT1);
2395 host->save_para.patch_bit2 = readl(host->base + MSDC_PATCH_BIT2);
2396 host->save_para.pad_ds_tune = readl(host->base + PAD_DS_TUNE);
2397 host->save_para.pad_cmd_tune = readl(host->base + PAD_CMD_TUNE);
2398 host->save_para.emmc50_cfg0 = readl(host->base + EMMC50_CFG0);
2399 host->save_para.emmc50_cfg3 = readl(host->base + EMMC50_CFG3);
2400 host->save_para.sdc_fifo_cfg = readl(host->base + SDC_FIFO_CFG);
2401 if (host->top_base) {
2402 host->save_para.emmc_top_control =
2403 readl(host->top_base + EMMC_TOP_CONTROL);
2404 host->save_para.emmc_top_cmd =
2405 readl(host->top_base + EMMC_TOP_CMD);
2406 host->save_para.emmc50_pad_ds_tune =
2407 readl(host->top_base + EMMC50_PAD_DS_TUNE);
2408 } else {
2409 host->save_para.pad_tune = readl(host->base + tune_reg);
2410 }
2411}
2412
2413static void msdc_restore_reg(struct msdc_host *host)
2414{
2415 u32 tune_reg = host->dev_comp->pad_tune_reg;
2416
2417 writel(host->save_para.msdc_cfg, host->base + MSDC_CFG);
2418 writel(host->save_para.iocon, host->base + MSDC_IOCON);
2419 writel(host->save_para.sdc_cfg, host->base + SDC_CFG);
2420 writel(host->save_para.patch_bit0, host->base + MSDC_PATCH_BIT);
2421 writel(host->save_para.patch_bit1, host->base + MSDC_PATCH_BIT1);
2422 writel(host->save_para.patch_bit2, host->base + MSDC_PATCH_BIT2);
2423 writel(host->save_para.pad_ds_tune, host->base + PAD_DS_TUNE);
2424 writel(host->save_para.pad_cmd_tune, host->base + PAD_CMD_TUNE);
2425 writel(host->save_para.emmc50_cfg0, host->base + EMMC50_CFG0);
2426 writel(host->save_para.emmc50_cfg3, host->base + EMMC50_CFG3);
2427 writel(host->save_para.sdc_fifo_cfg, host->base + SDC_FIFO_CFG);
2428 if (host->top_base) {
2429 writel(host->save_para.emmc_top_control,
2430 host->top_base + EMMC_TOP_CONTROL);
2431 writel(host->save_para.emmc_top_cmd,
2432 host->top_base + EMMC_TOP_CMD);
2433 writel(host->save_para.emmc50_pad_ds_tune,
2434 host->top_base + EMMC50_PAD_DS_TUNE);
2435 } else {
2436 writel(host->save_para.pad_tune, host->base + tune_reg);
2437 }
2438
2439 if (sdio_irq_claimed(host->mmc))
2440 __msdc_enable_sdio_irq(host, 1);
2441}
2442
2443static int msdc_runtime_suspend(struct device *dev)
2444{
2445 struct mmc_host *mmc = dev_get_drvdata(dev);
2446 struct msdc_host *host = mmc_priv(mmc);
2447
2448 msdc_save_reg(host);
2449 msdc_gate_clock(host);
2450 return 0;
2451}
2452
2453static int msdc_runtime_resume(struct device *dev)
2454{
2455 struct mmc_host *mmc = dev_get_drvdata(dev);
2456 struct msdc_host *host = mmc_priv(mmc);
2457
2458 msdc_ungate_clock(host);
2459 msdc_restore_reg(host);
2460 return 0;
2461}
2462#endif
2463
2464static const struct dev_pm_ops msdc_dev_pm_ops = {
2465 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
2466 pm_runtime_force_resume)
2467 SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL)
2468};
2469
2470static struct platform_driver mt_msdc_driver = {
2471 .probe = msdc_drv_probe,
2472 .remove = msdc_drv_remove,
2473 .driver = {
2474 .name = "mtk-msdc",
2475 .of_match_table = msdc_of_ids,
2476 .pm = &msdc_dev_pm_ops,
2477 },
2478};
2479
2480module_platform_driver(mt_msdc_driver);
2481MODULE_LICENSE("GPL v2");
2482MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");