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1/*
2 * drivers/mmc/host/via-sdmmc.c - VIA SD/MMC Card Reader driver
3 * Copyright (c) 2008, VIA Technologies Inc. All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or (at
8 * your option) any later version.
9 */
10
11#include <linux/pci.h>
12#include <linux/module.h>
13#include <linux/dma-mapping.h>
14#include <linux/highmem.h>
15#include <linux/delay.h>
16
17#include <linux/mmc/host.h>
18
19#define DRV_NAME "via_sdmmc"
20
21#define PCI_DEVICE_ID_VIA_9530 0x9530
22
23#define VIA_CRDR_SDC_OFF 0x200
24#define VIA_CRDR_DDMA_OFF 0x400
25#define VIA_CRDR_PCICTRL_OFF 0x600
26
27#define VIA_CRDR_MIN_CLOCK 375000
28#define VIA_CRDR_MAX_CLOCK 48000000
29
30/*
31 * PCI registers
32 */
33
34#define VIA_CRDR_PCI_WORK_MODE 0x40
35#define VIA_CRDR_PCI_DBG_MODE 0x41
36
37/*
38 * SDC MMIO Registers
39 */
40
41#define VIA_CRDR_SDCTRL 0x0
42#define VIA_CRDR_SDCTRL_START 0x01
43#define VIA_CRDR_SDCTRL_WRITE 0x04
44#define VIA_CRDR_SDCTRL_SINGLE_WR 0x10
45#define VIA_CRDR_SDCTRL_SINGLE_RD 0x20
46#define VIA_CRDR_SDCTRL_MULTI_WR 0x30
47#define VIA_CRDR_SDCTRL_MULTI_RD 0x40
48#define VIA_CRDR_SDCTRL_STOP 0x70
49
50#define VIA_CRDR_SDCTRL_RSP_NONE 0x0
51#define VIA_CRDR_SDCTRL_RSP_R1 0x10000
52#define VIA_CRDR_SDCTRL_RSP_R2 0x20000
53#define VIA_CRDR_SDCTRL_RSP_R3 0x30000
54#define VIA_CRDR_SDCTRL_RSP_R1B 0x90000
55
56#define VIA_CRDR_SDCARG 0x4
57
58#define VIA_CRDR_SDBUSMODE 0x8
59#define VIA_CRDR_SDMODE_4BIT 0x02
60#define VIA_CRDR_SDMODE_CLK_ON 0x40
61
62#define VIA_CRDR_SDBLKLEN 0xc
63/*
64 * Bit 0 -Bit 10 : Block length. So, the maximum block length should be 2048.
65 * Bit 11 - Bit 13 : Reserved.
66 * GPIDET : Select GPI pin to detect card, GPI means CR_CD# in top design.
67 * INTEN : Enable SD host interrupt.
68 * Bit 16 - Bit 31 : Block count. So, the maximun block count should be 65536.
69 */
70#define VIA_CRDR_SDBLKLEN_GPIDET 0x2000
71#define VIA_CRDR_SDBLKLEN_INTEN 0x8000
72#define VIA_CRDR_MAX_BLOCK_COUNT 65536
73#define VIA_CRDR_MAX_BLOCK_LENGTH 2048
74
75#define VIA_CRDR_SDRESP0 0x10
76#define VIA_CRDR_SDRESP1 0x14
77#define VIA_CRDR_SDRESP2 0x18
78#define VIA_CRDR_SDRESP3 0x1c
79
80#define VIA_CRDR_SDCURBLKCNT 0x20
81
82#define VIA_CRDR_SDINTMASK 0x24
83/*
84 * MBDIE : Multiple Blocks transfer Done Interrupt Enable
85 * BDDIE : Block Data transfer Done Interrupt Enable
86 * CIRIE : Card Insertion or Removal Interrupt Enable
87 * CRDIE : Command-Response transfer Done Interrupt Enable
88 * CRTOIE : Command-Response response TimeOut Interrupt Enable
89 * ASCRDIE : Auto Stop Command-Response transfer Done Interrupt Enable
90 * DTIE : Data access Timeout Interrupt Enable
91 * SCIE : reSponse CRC error Interrupt Enable
92 * RCIE : Read data CRC error Interrupt Enable
93 * WCIE : Write data CRC error Interrupt Enable
94 */
95#define VIA_CRDR_SDINTMASK_MBDIE 0x10
96#define VIA_CRDR_SDINTMASK_BDDIE 0x20
97#define VIA_CRDR_SDINTMASK_CIRIE 0x80
98#define VIA_CRDR_SDINTMASK_CRDIE 0x200
99#define VIA_CRDR_SDINTMASK_CRTOIE 0x400
100#define VIA_CRDR_SDINTMASK_ASCRDIE 0x800
101#define VIA_CRDR_SDINTMASK_DTIE 0x1000
102#define VIA_CRDR_SDINTMASK_SCIE 0x2000
103#define VIA_CRDR_SDINTMASK_RCIE 0x4000
104#define VIA_CRDR_SDINTMASK_WCIE 0x8000
105
106#define VIA_CRDR_SDACTIVE_INTMASK \
107 (VIA_CRDR_SDINTMASK_MBDIE | VIA_CRDR_SDINTMASK_CIRIE \
108 | VIA_CRDR_SDINTMASK_CRDIE | VIA_CRDR_SDINTMASK_CRTOIE \
109 | VIA_CRDR_SDINTMASK_DTIE | VIA_CRDR_SDINTMASK_SCIE \
110 | VIA_CRDR_SDINTMASK_RCIE | VIA_CRDR_SDINTMASK_WCIE)
111
112#define VIA_CRDR_SDSTATUS 0x28
113/*
114 * CECC : Reserved
115 * WP : SD card Write Protect status
116 * SLOTD : Reserved
117 * SLOTG : SD SLOT status(Gpi pin status)
118 * MBD : Multiple Blocks transfer Done interrupt status
119 * BDD : Block Data transfer Done interrupt status
120 * CD : Reserved
121 * CIR : Card Insertion or Removal interrupt detected on GPI pin
122 * IO : Reserved
123 * CRD : Command-Response transfer Done interrupt status
124 * CRTO : Command-Response response TimeOut interrupt status
125 * ASCRDIE : Auto Stop Command-Response transfer Done interrupt status
126 * DT : Data access Timeout interrupt status
127 * SC : reSponse CRC error interrupt status
128 * RC : Read data CRC error interrupt status
129 * WC : Write data CRC error interrupt status
130 */
131#define VIA_CRDR_SDSTS_CECC 0x01
132#define VIA_CRDR_SDSTS_WP 0x02
133#define VIA_CRDR_SDSTS_SLOTD 0x04
134#define VIA_CRDR_SDSTS_SLOTG 0x08
135#define VIA_CRDR_SDSTS_MBD 0x10
136#define VIA_CRDR_SDSTS_BDD 0x20
137#define VIA_CRDR_SDSTS_CD 0x40
138#define VIA_CRDR_SDSTS_CIR 0x80
139#define VIA_CRDR_SDSTS_IO 0x100
140#define VIA_CRDR_SDSTS_CRD 0x200
141#define VIA_CRDR_SDSTS_CRTO 0x400
142#define VIA_CRDR_SDSTS_ASCRDIE 0x800
143#define VIA_CRDR_SDSTS_DT 0x1000
144#define VIA_CRDR_SDSTS_SC 0x2000
145#define VIA_CRDR_SDSTS_RC 0x4000
146#define VIA_CRDR_SDSTS_WC 0x8000
147
148#define VIA_CRDR_SDSTS_IGN_MASK\
149 (VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_IO)
150#define VIA_CRDR_SDSTS_INT_MASK \
151 (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_CD \
152 | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_IO | VIA_CRDR_SDSTS_CRD \
153 | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \
154 | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
155#define VIA_CRDR_SDSTS_W1C_MASK \
156 (VIA_CRDR_SDSTS_CECC | VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD \
157 | VIA_CRDR_SDSTS_CD | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_CRD \
158 | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \
159 | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
160#define VIA_CRDR_SDSTS_CMD_MASK \
161 (VIA_CRDR_SDSTS_CRD | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_SC)
162#define VIA_CRDR_SDSTS_DATA_MASK\
163 (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_DT \
164 | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
165
166#define VIA_CRDR_SDSTATUS2 0x2a
167/*
168 * CFE : Enable SD host automatic Clock FReezing
169 */
170#define VIA_CRDR_SDSTS_CFE 0x80
171
172#define VIA_CRDR_SDRSPTMO 0x2C
173
174#define VIA_CRDR_SDCLKSEL 0x30
175
176#define VIA_CRDR_SDEXTCTRL 0x34
177#define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SD 0x01
178#define VIS_CRDR_SDEXTCTRL_SHIFT_9 0x02
179#define VIS_CRDR_SDEXTCTRL_MMC_8BIT 0x04
180#define VIS_CRDR_SDEXTCTRL_RELD_BLK 0x08
181#define VIS_CRDR_SDEXTCTRL_BAD_CMDA 0x10
182#define VIS_CRDR_SDEXTCTRL_BAD_DATA 0x20
183#define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SPI 0x40
184#define VIA_CRDR_SDEXTCTRL_HISPD 0x80
185/* 0x38-0xFF reserved */
186
187/*
188 * Data DMA Control Registers
189 */
190
191#define VIA_CRDR_DMABASEADD 0x0
192#define VIA_CRDR_DMACOUNTER 0x4
193
194#define VIA_CRDR_DMACTRL 0x8
195/*
196 * DIR :Transaction Direction
197 * 0 : From card to memory
198 * 1 : From memory to card
199 */
200#define VIA_CRDR_DMACTRL_DIR 0x100
201#define VIA_CRDR_DMACTRL_ENIRQ 0x10000
202#define VIA_CRDR_DMACTRL_SFTRST 0x1000000
203
204#define VIA_CRDR_DMASTS 0xc
205
206#define VIA_CRDR_DMASTART 0x10
207/*0x14-0xFF reserved*/
208
209/*
210 * PCI Control Registers
211 */
212
213/*0x0 - 0x1 reserved*/
214#define VIA_CRDR_PCICLKGATT 0x2
215/*
216 * SFTRST :
217 * 0 : Soft reset all the controller and it will be de-asserted automatically
218 * 1 : Soft reset is de-asserted
219 */
220#define VIA_CRDR_PCICLKGATT_SFTRST 0x01
221/*
222 * 3V3 : Pad power select
223 * 0 : 1.8V
224 * 1 : 3.3V
225 * NOTE : No mater what the actual value should be, this bit always
226 * read as 0. This is a hardware bug.
227 */
228#define VIA_CRDR_PCICLKGATT_3V3 0x10
229/*
230 * PAD_PWRON : Pad Power on/off select
231 * 0 : Power off
232 * 1 : Power on
233 * NOTE : No mater what the actual value should be, this bit always
234 * read as 0. This is a hardware bug.
235 */
236#define VIA_CRDR_PCICLKGATT_PAD_PWRON 0x20
237
238#define VIA_CRDR_PCISDCCLK 0x5
239
240#define VIA_CRDR_PCIDMACLK 0x7
241#define VIA_CRDR_PCIDMACLK_SDC 0x2
242
243#define VIA_CRDR_PCIINTCTRL 0x8
244#define VIA_CRDR_PCIINTCTRL_SDCIRQEN 0x04
245
246#define VIA_CRDR_PCIINTSTATUS 0x9
247#define VIA_CRDR_PCIINTSTATUS_SDC 0x04
248
249#define VIA_CRDR_PCITMOCTRL 0xa
250#define VIA_CRDR_PCITMOCTRL_NO 0x0
251#define VIA_CRDR_PCITMOCTRL_32US 0x1
252#define VIA_CRDR_PCITMOCTRL_256US 0x2
253#define VIA_CRDR_PCITMOCTRL_1024US 0x3
254#define VIA_CRDR_PCITMOCTRL_256MS 0x4
255#define VIA_CRDR_PCITMOCTRL_512MS 0x5
256#define VIA_CRDR_PCITMOCTRL_1024MS 0x6
257
258/*0xB-0xFF reserved*/
259
260enum PCI_HOST_CLK_CONTROL {
261 PCI_CLK_375K = 0x03,
262 PCI_CLK_8M = 0x04,
263 PCI_CLK_12M = 0x00,
264 PCI_CLK_16M = 0x05,
265 PCI_CLK_24M = 0x01,
266 PCI_CLK_33M = 0x06,
267 PCI_CLK_48M = 0x02
268};
269
270struct sdhcreg {
271 u32 sdcontrol_reg;
272 u32 sdcmdarg_reg;
273 u32 sdbusmode_reg;
274 u32 sdblklen_reg;
275 u32 sdresp_reg[4];
276 u32 sdcurblkcnt_reg;
277 u32 sdintmask_reg;
278 u32 sdstatus_reg;
279 u32 sdrsptmo_reg;
280 u32 sdclksel_reg;
281 u32 sdextctrl_reg;
282};
283
284struct pcictrlreg {
285 u8 reserve[2];
286 u8 pciclkgat_reg;
287 u8 pcinfcclk_reg;
288 u8 pcimscclk_reg;
289 u8 pcisdclk_reg;
290 u8 pcicaclk_reg;
291 u8 pcidmaclk_reg;
292 u8 pciintctrl_reg;
293 u8 pciintstatus_reg;
294 u8 pcitmoctrl_reg;
295 u8 Resv;
296};
297
298struct via_crdr_mmc_host {
299 struct mmc_host *mmc;
300 struct mmc_request *mrq;
301 struct mmc_command *cmd;
302 struct mmc_data *data;
303
304 void __iomem *mmiobase;
305 void __iomem *sdhc_mmiobase;
306 void __iomem *ddma_mmiobase;
307 void __iomem *pcictrl_mmiobase;
308
309 struct pcictrlreg pm_pcictrl_reg;
310 struct sdhcreg pm_sdhc_reg;
311
312 struct work_struct carddet_work;
313 struct tasklet_struct finish_tasklet;
314
315 struct timer_list timer;
316 spinlock_t lock;
317 u8 power;
318 int reject;
319 unsigned int quirks;
320};
321
322/* some devices need a very long delay for power to stabilize */
323#define VIA_CRDR_QUIRK_300MS_PWRDELAY 0x0001
324
325static struct pci_device_id via_ids[] = {
326 {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_9530,
327 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,},
328 {0,}
329};
330
331MODULE_DEVICE_TABLE(pci, via_ids);
332
333static void via_print_sdchc(struct via_crdr_mmc_host *host)
334{
335 void __iomem *addrbase = host->sdhc_mmiobase;
336
337 pr_debug("SDC MMIO Registers:\n");
338 pr_debug("SDCONTROL=%08x, SDCMDARG=%08x, SDBUSMODE=%08x\n",
339 readl(addrbase + VIA_CRDR_SDCTRL),
340 readl(addrbase + VIA_CRDR_SDCARG),
341 readl(addrbase + VIA_CRDR_SDBUSMODE));
342 pr_debug("SDBLKLEN=%08x, SDCURBLKCNT=%08x, SDINTMASK=%08x\n",
343 readl(addrbase + VIA_CRDR_SDBLKLEN),
344 readl(addrbase + VIA_CRDR_SDCURBLKCNT),
345 readl(addrbase + VIA_CRDR_SDINTMASK));
346 pr_debug("SDSTATUS=%08x, SDCLKSEL=%08x, SDEXTCTRL=%08x\n",
347 readl(addrbase + VIA_CRDR_SDSTATUS),
348 readl(addrbase + VIA_CRDR_SDCLKSEL),
349 readl(addrbase + VIA_CRDR_SDEXTCTRL));
350}
351
352static void via_print_pcictrl(struct via_crdr_mmc_host *host)
353{
354 void __iomem *addrbase = host->pcictrl_mmiobase;
355
356 pr_debug("PCI Control Registers:\n");
357 pr_debug("PCICLKGATT=%02x, PCISDCCLK=%02x, PCIDMACLK=%02x\n",
358 readb(addrbase + VIA_CRDR_PCICLKGATT),
359 readb(addrbase + VIA_CRDR_PCISDCCLK),
360 readb(addrbase + VIA_CRDR_PCIDMACLK));
361 pr_debug("PCIINTCTRL=%02x, PCIINTSTATUS=%02x\n",
362 readb(addrbase + VIA_CRDR_PCIINTCTRL),
363 readb(addrbase + VIA_CRDR_PCIINTSTATUS));
364}
365
366static void via_save_pcictrlreg(struct via_crdr_mmc_host *host)
367{
368 struct pcictrlreg *pm_pcictrl_reg;
369 void __iomem *addrbase;
370
371 pm_pcictrl_reg = &(host->pm_pcictrl_reg);
372 addrbase = host->pcictrl_mmiobase;
373
374 pm_pcictrl_reg->pciclkgat_reg = readb(addrbase + VIA_CRDR_PCICLKGATT);
375 pm_pcictrl_reg->pciclkgat_reg |=
376 VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON;
377 pm_pcictrl_reg->pcisdclk_reg = readb(addrbase + VIA_CRDR_PCISDCCLK);
378 pm_pcictrl_reg->pcidmaclk_reg = readb(addrbase + VIA_CRDR_PCIDMACLK);
379 pm_pcictrl_reg->pciintctrl_reg = readb(addrbase + VIA_CRDR_PCIINTCTRL);
380 pm_pcictrl_reg->pciintstatus_reg =
381 readb(addrbase + VIA_CRDR_PCIINTSTATUS);
382 pm_pcictrl_reg->pcitmoctrl_reg = readb(addrbase + VIA_CRDR_PCITMOCTRL);
383}
384
385static void via_restore_pcictrlreg(struct via_crdr_mmc_host *host)
386{
387 struct pcictrlreg *pm_pcictrl_reg;
388 void __iomem *addrbase;
389
390 pm_pcictrl_reg = &(host->pm_pcictrl_reg);
391 addrbase = host->pcictrl_mmiobase;
392
393 writeb(pm_pcictrl_reg->pciclkgat_reg, addrbase + VIA_CRDR_PCICLKGATT);
394 writeb(pm_pcictrl_reg->pcisdclk_reg, addrbase + VIA_CRDR_PCISDCCLK);
395 writeb(pm_pcictrl_reg->pcidmaclk_reg, addrbase + VIA_CRDR_PCIDMACLK);
396 writeb(pm_pcictrl_reg->pciintctrl_reg, addrbase + VIA_CRDR_PCIINTCTRL);
397 writeb(pm_pcictrl_reg->pciintstatus_reg,
398 addrbase + VIA_CRDR_PCIINTSTATUS);
399 writeb(pm_pcictrl_reg->pcitmoctrl_reg, addrbase + VIA_CRDR_PCITMOCTRL);
400}
401
402static void via_save_sdcreg(struct via_crdr_mmc_host *host)
403{
404 struct sdhcreg *pm_sdhc_reg;
405 void __iomem *addrbase;
406
407 pm_sdhc_reg = &(host->pm_sdhc_reg);
408 addrbase = host->sdhc_mmiobase;
409
410 pm_sdhc_reg->sdcontrol_reg = readl(addrbase + VIA_CRDR_SDCTRL);
411 pm_sdhc_reg->sdcmdarg_reg = readl(addrbase + VIA_CRDR_SDCARG);
412 pm_sdhc_reg->sdbusmode_reg = readl(addrbase + VIA_CRDR_SDBUSMODE);
413 pm_sdhc_reg->sdblklen_reg = readl(addrbase + VIA_CRDR_SDBLKLEN);
414 pm_sdhc_reg->sdcurblkcnt_reg = readl(addrbase + VIA_CRDR_SDCURBLKCNT);
415 pm_sdhc_reg->sdintmask_reg = readl(addrbase + VIA_CRDR_SDINTMASK);
416 pm_sdhc_reg->sdstatus_reg = readl(addrbase + VIA_CRDR_SDSTATUS);
417 pm_sdhc_reg->sdrsptmo_reg = readl(addrbase + VIA_CRDR_SDRSPTMO);
418 pm_sdhc_reg->sdclksel_reg = readl(addrbase + VIA_CRDR_SDCLKSEL);
419 pm_sdhc_reg->sdextctrl_reg = readl(addrbase + VIA_CRDR_SDEXTCTRL);
420}
421
422static void via_restore_sdcreg(struct via_crdr_mmc_host *host)
423{
424 struct sdhcreg *pm_sdhc_reg;
425 void __iomem *addrbase;
426
427 pm_sdhc_reg = &(host->pm_sdhc_reg);
428 addrbase = host->sdhc_mmiobase;
429
430 writel(pm_sdhc_reg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL);
431 writel(pm_sdhc_reg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG);
432 writel(pm_sdhc_reg->sdbusmode_reg, addrbase + VIA_CRDR_SDBUSMODE);
433 writel(pm_sdhc_reg->sdblklen_reg, addrbase + VIA_CRDR_SDBLKLEN);
434 writel(pm_sdhc_reg->sdcurblkcnt_reg, addrbase + VIA_CRDR_SDCURBLKCNT);
435 writel(pm_sdhc_reg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK);
436 writel(pm_sdhc_reg->sdstatus_reg, addrbase + VIA_CRDR_SDSTATUS);
437 writel(pm_sdhc_reg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO);
438 writel(pm_sdhc_reg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL);
439 writel(pm_sdhc_reg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL);
440}
441
442static void via_pwron_sleep(struct via_crdr_mmc_host *sdhost)
443{
444 if (sdhost->quirks & VIA_CRDR_QUIRK_300MS_PWRDELAY)
445 msleep(300);
446 else
447 msleep(3);
448}
449
450static void via_set_ddma(struct via_crdr_mmc_host *host,
451 dma_addr_t dmaaddr, u32 count, int dir, int enirq)
452{
453 void __iomem *addrbase;
454 u32 ctrl_data = 0;
455
456 if (enirq)
457 ctrl_data |= VIA_CRDR_DMACTRL_ENIRQ;
458
459 if (dir)
460 ctrl_data |= VIA_CRDR_DMACTRL_DIR;
461
462 addrbase = host->ddma_mmiobase;
463
464 writel(dmaaddr, addrbase + VIA_CRDR_DMABASEADD);
465 writel(count, addrbase + VIA_CRDR_DMACOUNTER);
466 writel(ctrl_data, addrbase + VIA_CRDR_DMACTRL);
467 writel(0x01, addrbase + VIA_CRDR_DMASTART);
468
469 /* It seems that our DMA can not work normally with 375kHz clock */
470 /* FIXME: don't brute-force 8MHz but use PIO at 375kHz !! */
471 addrbase = host->pcictrl_mmiobase;
472 if (readb(addrbase + VIA_CRDR_PCISDCCLK) == PCI_CLK_375K) {
473 dev_info(host->mmc->parent, "forcing card speed to 8MHz\n");
474 writeb(PCI_CLK_8M, addrbase + VIA_CRDR_PCISDCCLK);
475 }
476}
477
478static void via_sdc_preparedata(struct via_crdr_mmc_host *host,
479 struct mmc_data *data)
480{
481 void __iomem *addrbase;
482 u32 blk_reg;
483 int count;
484
485 WARN_ON(host->data);
486
487 /* Sanity checks */
488 BUG_ON(data->blksz > host->mmc->max_blk_size);
489 BUG_ON(data->blocks > host->mmc->max_blk_count);
490
491 host->data = data;
492
493 count = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
494 ((data->flags & MMC_DATA_READ) ?
495 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE));
496 BUG_ON(count != 1);
497
498 via_set_ddma(host, sg_dma_address(data->sg), sg_dma_len(data->sg),
499 (data->flags & MMC_DATA_WRITE) ? 1 : 0, 1);
500
501 addrbase = host->sdhc_mmiobase;
502
503 blk_reg = data->blksz - 1;
504 blk_reg |= VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
505 blk_reg |= (data->blocks) << 16;
506
507 writel(blk_reg, addrbase + VIA_CRDR_SDBLKLEN);
508}
509
510static void via_sdc_get_response(struct via_crdr_mmc_host *host,
511 struct mmc_command *cmd)
512{
513 void __iomem *addrbase = host->sdhc_mmiobase;
514 u32 dwdata0 = readl(addrbase + VIA_CRDR_SDRESP0);
515 u32 dwdata1 = readl(addrbase + VIA_CRDR_SDRESP1);
516 u32 dwdata2 = readl(addrbase + VIA_CRDR_SDRESP2);
517 u32 dwdata3 = readl(addrbase + VIA_CRDR_SDRESP3);
518
519 if (cmd->flags & MMC_RSP_136) {
520 cmd->resp[0] = ((u8) (dwdata1)) |
521 (((u8) (dwdata0 >> 24)) << 8) |
522 (((u8) (dwdata0 >> 16)) << 16) |
523 (((u8) (dwdata0 >> 8)) << 24);
524
525 cmd->resp[1] = ((u8) (dwdata2)) |
526 (((u8) (dwdata1 >> 24)) << 8) |
527 (((u8) (dwdata1 >> 16)) << 16) |
528 (((u8) (dwdata1 >> 8)) << 24);
529
530 cmd->resp[2] = ((u8) (dwdata3)) |
531 (((u8) (dwdata2 >> 24)) << 8) |
532 (((u8) (dwdata2 >> 16)) << 16) |
533 (((u8) (dwdata2 >> 8)) << 24);
534
535 cmd->resp[3] = 0xff |
536 ((((u8) (dwdata3 >> 24))) << 8) |
537 (((u8) (dwdata3 >> 16)) << 16) |
538 (((u8) (dwdata3 >> 8)) << 24);
539 } else {
540 dwdata0 >>= 8;
541 cmd->resp[0] = ((dwdata0 & 0xff) << 24) |
542 (((dwdata0 >> 8) & 0xff) << 16) |
543 (((dwdata0 >> 16) & 0xff) << 8) | (dwdata1 & 0xff);
544
545 dwdata1 >>= 8;
546 cmd->resp[1] = ((dwdata1 & 0xff) << 24) |
547 (((dwdata1 >> 8) & 0xff) << 16) |
548 (((dwdata1 >> 16) & 0xff) << 8);
549 }
550}
551
552static void via_sdc_send_command(struct via_crdr_mmc_host *host,
553 struct mmc_command *cmd)
554{
555 void __iomem *addrbase;
556 struct mmc_data *data;
557 u32 cmdctrl = 0;
558
559 WARN_ON(host->cmd);
560
561 data = cmd->data;
562 mod_timer(&host->timer, jiffies + HZ);
563 host->cmd = cmd;
564
565 /*Command index*/
566 cmdctrl = cmd->opcode << 8;
567
568 /*Response type*/
569 switch (mmc_resp_type(cmd)) {
570 case MMC_RSP_NONE:
571 cmdctrl |= VIA_CRDR_SDCTRL_RSP_NONE;
572 break;
573 case MMC_RSP_R1:
574 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1;
575 break;
576 case MMC_RSP_R1B:
577 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1B;
578 break;
579 case MMC_RSP_R2:
580 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R2;
581 break;
582 case MMC_RSP_R3:
583 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R3;
584 break;
585 default:
586 pr_err("%s: cmd->flag is not valid\n", mmc_hostname(host->mmc));
587 break;
588 }
589
590 if (!(cmd->data))
591 goto nodata;
592
593 via_sdc_preparedata(host, data);
594
595 /*Command control*/
596 if (data->blocks > 1) {
597 if (data->flags & MMC_DATA_WRITE) {
598 cmdctrl |= VIA_CRDR_SDCTRL_WRITE;
599 cmdctrl |= VIA_CRDR_SDCTRL_MULTI_WR;
600 } else {
601 cmdctrl |= VIA_CRDR_SDCTRL_MULTI_RD;
602 }
603 } else {
604 if (data->flags & MMC_DATA_WRITE) {
605 cmdctrl |= VIA_CRDR_SDCTRL_WRITE;
606 cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_WR;
607 } else {
608 cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_RD;
609 }
610 }
611
612nodata:
613 if (cmd == host->mrq->stop)
614 cmdctrl |= VIA_CRDR_SDCTRL_STOP;
615
616 cmdctrl |= VIA_CRDR_SDCTRL_START;
617
618 addrbase = host->sdhc_mmiobase;
619 writel(cmd->arg, addrbase + VIA_CRDR_SDCARG);
620 writel(cmdctrl, addrbase + VIA_CRDR_SDCTRL);
621}
622
623static void via_sdc_finish_data(struct via_crdr_mmc_host *host)
624{
625 struct mmc_data *data;
626
627 BUG_ON(!host->data);
628
629 data = host->data;
630 host->data = NULL;
631
632 if (data->error)
633 data->bytes_xfered = 0;
634 else
635 data->bytes_xfered = data->blocks * data->blksz;
636
637 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
638 ((data->flags & MMC_DATA_READ) ?
639 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE));
640
641 if (data->stop)
642 via_sdc_send_command(host, data->stop);
643 else
644 tasklet_schedule(&host->finish_tasklet);
645}
646
647static void via_sdc_finish_command(struct via_crdr_mmc_host *host)
648{
649 via_sdc_get_response(host, host->cmd);
650
651 host->cmd->error = 0;
652
653 if (!host->cmd->data)
654 tasklet_schedule(&host->finish_tasklet);
655
656 host->cmd = NULL;
657}
658
659static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq)
660{
661 void __iomem *addrbase;
662 struct via_crdr_mmc_host *host;
663 unsigned long flags;
664 u16 status;
665
666 host = mmc_priv(mmc);
667
668 spin_lock_irqsave(&host->lock, flags);
669
670 addrbase = host->pcictrl_mmiobase;
671 writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK);
672
673 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
674 status &= VIA_CRDR_SDSTS_W1C_MASK;
675 writew(status, host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
676
677 WARN_ON(host->mrq != NULL);
678 host->mrq = mrq;
679
680 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
681 if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) {
682 host->mrq->cmd->error = -ENOMEDIUM;
683 tasklet_schedule(&host->finish_tasklet);
684 } else {
685 via_sdc_send_command(host, mrq->cmd);
686 }
687
688 mmiowb();
689 spin_unlock_irqrestore(&host->lock, flags);
690}
691
692static void via_sdc_set_power(struct via_crdr_mmc_host *host,
693 unsigned short power, unsigned int on)
694{
695 unsigned long flags;
696 u8 gatt;
697
698 spin_lock_irqsave(&host->lock, flags);
699
700 host->power = (1 << power);
701
702 gatt = readb(host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
703 if (host->power == MMC_VDD_165_195)
704 gatt &= ~VIA_CRDR_PCICLKGATT_3V3;
705 else
706 gatt |= VIA_CRDR_PCICLKGATT_3V3;
707 if (on)
708 gatt |= VIA_CRDR_PCICLKGATT_PAD_PWRON;
709 else
710 gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON;
711 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
712
713 mmiowb();
714 spin_unlock_irqrestore(&host->lock, flags);
715
716 via_pwron_sleep(host);
717}
718
719static void via_sdc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
720{
721 struct via_crdr_mmc_host *host;
722 unsigned long flags;
723 void __iomem *addrbase;
724 u32 org_data, sdextctrl;
725 u8 clock;
726
727 host = mmc_priv(mmc);
728
729 spin_lock_irqsave(&host->lock, flags);
730
731 addrbase = host->sdhc_mmiobase;
732 org_data = readl(addrbase + VIA_CRDR_SDBUSMODE);
733 sdextctrl = readl(addrbase + VIA_CRDR_SDEXTCTRL);
734
735 if (ios->bus_width == MMC_BUS_WIDTH_1)
736 org_data &= ~VIA_CRDR_SDMODE_4BIT;
737 else
738 org_data |= VIA_CRDR_SDMODE_4BIT;
739
740 if (ios->power_mode == MMC_POWER_OFF)
741 org_data &= ~VIA_CRDR_SDMODE_CLK_ON;
742 else
743 org_data |= VIA_CRDR_SDMODE_CLK_ON;
744
745 if (ios->timing == MMC_TIMING_SD_HS)
746 sdextctrl |= VIA_CRDR_SDEXTCTRL_HISPD;
747 else
748 sdextctrl &= ~VIA_CRDR_SDEXTCTRL_HISPD;
749
750 writel(org_data, addrbase + VIA_CRDR_SDBUSMODE);
751 writel(sdextctrl, addrbase + VIA_CRDR_SDEXTCTRL);
752
753 if (ios->clock >= 48000000)
754 clock = PCI_CLK_48M;
755 else if (ios->clock >= 33000000)
756 clock = PCI_CLK_33M;
757 else if (ios->clock >= 24000000)
758 clock = PCI_CLK_24M;
759 else if (ios->clock >= 16000000)
760 clock = PCI_CLK_16M;
761 else if (ios->clock >= 12000000)
762 clock = PCI_CLK_12M;
763 else if (ios->clock >= 8000000)
764 clock = PCI_CLK_8M;
765 else
766 clock = PCI_CLK_375K;
767
768 addrbase = host->pcictrl_mmiobase;
769 if (readb(addrbase + VIA_CRDR_PCISDCCLK) != clock)
770 writeb(clock, addrbase + VIA_CRDR_PCISDCCLK);
771
772 mmiowb();
773 spin_unlock_irqrestore(&host->lock, flags);
774
775 if (ios->power_mode != MMC_POWER_OFF)
776 via_sdc_set_power(host, ios->vdd, 1);
777 else
778 via_sdc_set_power(host, ios->vdd, 0);
779}
780
781static int via_sdc_get_ro(struct mmc_host *mmc)
782{
783 struct via_crdr_mmc_host *host;
784 unsigned long flags;
785 u16 status;
786
787 host = mmc_priv(mmc);
788
789 spin_lock_irqsave(&host->lock, flags);
790
791 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
792
793 spin_unlock_irqrestore(&host->lock, flags);
794
795 return !(status & VIA_CRDR_SDSTS_WP);
796}
797
798static const struct mmc_host_ops via_sdc_ops = {
799 .request = via_sdc_request,
800 .set_ios = via_sdc_set_ios,
801 .get_ro = via_sdc_get_ro,
802};
803
804static void via_reset_pcictrl(struct via_crdr_mmc_host *host)
805{
806 unsigned long flags;
807 u8 gatt;
808
809 spin_lock_irqsave(&host->lock, flags);
810
811 via_save_pcictrlreg(host);
812 via_save_sdcreg(host);
813
814 spin_unlock_irqrestore(&host->lock, flags);
815
816 gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON;
817 if (host->power == MMC_VDD_165_195)
818 gatt &= VIA_CRDR_PCICLKGATT_3V3;
819 else
820 gatt |= VIA_CRDR_PCICLKGATT_3V3;
821 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
822 via_pwron_sleep(host);
823 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
824 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
825 msleep(3);
826
827 spin_lock_irqsave(&host->lock, flags);
828
829 via_restore_pcictrlreg(host);
830 via_restore_sdcreg(host);
831
832 mmiowb();
833 spin_unlock_irqrestore(&host->lock, flags);
834}
835
836static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask)
837{
838 BUG_ON(intmask == 0);
839
840 if (!host->cmd) {
841 pr_err("%s: Got command interrupt 0x%x even "
842 "though no command operation was in progress.\n",
843 mmc_hostname(host->mmc), intmask);
844 return;
845 }
846
847 if (intmask & VIA_CRDR_SDSTS_CRTO)
848 host->cmd->error = -ETIMEDOUT;
849 else if (intmask & VIA_CRDR_SDSTS_SC)
850 host->cmd->error = -EILSEQ;
851
852 if (host->cmd->error)
853 tasklet_schedule(&host->finish_tasklet);
854 else if (intmask & VIA_CRDR_SDSTS_CRD)
855 via_sdc_finish_command(host);
856}
857
858static void via_sdc_data_isr(struct via_crdr_mmc_host *host, u16 intmask)
859{
860 BUG_ON(intmask == 0);
861
862 if (intmask & VIA_CRDR_SDSTS_DT)
863 host->data->error = -ETIMEDOUT;
864 else if (intmask & (VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC))
865 host->data->error = -EILSEQ;
866
867 via_sdc_finish_data(host);
868}
869
870static irqreturn_t via_sdc_isr(int irq, void *dev_id)
871{
872 struct via_crdr_mmc_host *sdhost = dev_id;
873 void __iomem *addrbase;
874 u8 pci_status;
875 u16 sd_status;
876 irqreturn_t result;
877
878 if (!sdhost)
879 return IRQ_NONE;
880
881 spin_lock(&sdhost->lock);
882
883 addrbase = sdhost->pcictrl_mmiobase;
884 pci_status = readb(addrbase + VIA_CRDR_PCIINTSTATUS);
885 if (!(pci_status & VIA_CRDR_PCIINTSTATUS_SDC)) {
886 result = IRQ_NONE;
887 goto out;
888 }
889
890 addrbase = sdhost->sdhc_mmiobase;
891 sd_status = readw(addrbase + VIA_CRDR_SDSTATUS);
892 sd_status &= VIA_CRDR_SDSTS_INT_MASK;
893 sd_status &= ~VIA_CRDR_SDSTS_IGN_MASK;
894 if (!sd_status) {
895 result = IRQ_NONE;
896 goto out;
897 }
898
899 if (sd_status & VIA_CRDR_SDSTS_CIR) {
900 writew(sd_status & VIA_CRDR_SDSTS_CIR,
901 addrbase + VIA_CRDR_SDSTATUS);
902
903 schedule_work(&sdhost->carddet_work);
904 }
905
906 sd_status &= ~VIA_CRDR_SDSTS_CIR;
907 if (sd_status & VIA_CRDR_SDSTS_CMD_MASK) {
908 writew(sd_status & VIA_CRDR_SDSTS_CMD_MASK,
909 addrbase + VIA_CRDR_SDSTATUS);
910 via_sdc_cmd_isr(sdhost, sd_status & VIA_CRDR_SDSTS_CMD_MASK);
911 }
912 if (sd_status & VIA_CRDR_SDSTS_DATA_MASK) {
913 writew(sd_status & VIA_CRDR_SDSTS_DATA_MASK,
914 addrbase + VIA_CRDR_SDSTATUS);
915 via_sdc_data_isr(sdhost, sd_status & VIA_CRDR_SDSTS_DATA_MASK);
916 }
917
918 sd_status &= ~(VIA_CRDR_SDSTS_CMD_MASK | VIA_CRDR_SDSTS_DATA_MASK);
919 if (sd_status) {
920 pr_err("%s: Unexpected interrupt 0x%x\n",
921 mmc_hostname(sdhost->mmc), sd_status);
922 writew(sd_status, addrbase + VIA_CRDR_SDSTATUS);
923 }
924
925 result = IRQ_HANDLED;
926
927 mmiowb();
928out:
929 spin_unlock(&sdhost->lock);
930
931 return result;
932}
933
934static void via_sdc_timeout(unsigned long ulongdata)
935{
936 struct via_crdr_mmc_host *sdhost;
937 unsigned long flags;
938
939 sdhost = (struct via_crdr_mmc_host *)ulongdata;
940
941 spin_lock_irqsave(&sdhost->lock, flags);
942
943 if (sdhost->mrq) {
944 pr_err("%s: Timeout waiting for hardware interrupt."
945 "cmd:0x%x\n", mmc_hostname(sdhost->mmc),
946 sdhost->mrq->cmd->opcode);
947
948 if (sdhost->data) {
949 writel(VIA_CRDR_DMACTRL_SFTRST,
950 sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL);
951 sdhost->data->error = -ETIMEDOUT;
952 via_sdc_finish_data(sdhost);
953 } else {
954 if (sdhost->cmd)
955 sdhost->cmd->error = -ETIMEDOUT;
956 else
957 sdhost->mrq->cmd->error = -ETIMEDOUT;
958 tasklet_schedule(&sdhost->finish_tasklet);
959 }
960 }
961
962 mmiowb();
963 spin_unlock_irqrestore(&sdhost->lock, flags);
964}
965
966static void via_sdc_tasklet_finish(unsigned long param)
967{
968 struct via_crdr_mmc_host *host;
969 unsigned long flags;
970 struct mmc_request *mrq;
971
972 host = (struct via_crdr_mmc_host *)param;
973
974 spin_lock_irqsave(&host->lock, flags);
975
976 del_timer(&host->timer);
977 mrq = host->mrq;
978 host->mrq = NULL;
979 host->cmd = NULL;
980 host->data = NULL;
981
982 spin_unlock_irqrestore(&host->lock, flags);
983
984 mmc_request_done(host->mmc, mrq);
985}
986
987static void via_sdc_card_detect(struct work_struct *work)
988{
989 struct via_crdr_mmc_host *host;
990 void __iomem *addrbase;
991 unsigned long flags;
992 u16 status;
993
994 host = container_of(work, struct via_crdr_mmc_host, carddet_work);
995
996 addrbase = host->ddma_mmiobase;
997 writel(VIA_CRDR_DMACTRL_SFTRST, addrbase + VIA_CRDR_DMACTRL);
998
999 spin_lock_irqsave(&host->lock, flags);
1000
1001 addrbase = host->pcictrl_mmiobase;
1002 writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK);
1003
1004 addrbase = host->sdhc_mmiobase;
1005 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1006 if (!(status & VIA_CRDR_SDSTS_SLOTG)) {
1007 if (host->mrq) {
1008 pr_err("%s: Card removed during transfer!\n",
1009 mmc_hostname(host->mmc));
1010 host->mrq->cmd->error = -ENOMEDIUM;
1011 tasklet_schedule(&host->finish_tasklet);
1012 }
1013
1014 mmiowb();
1015 spin_unlock_irqrestore(&host->lock, flags);
1016
1017 via_reset_pcictrl(host);
1018
1019 spin_lock_irqsave(&host->lock, flags);
1020 }
1021
1022 mmiowb();
1023 spin_unlock_irqrestore(&host->lock, flags);
1024
1025 via_print_pcictrl(host);
1026 via_print_sdchc(host);
1027
1028 mmc_detect_change(host->mmc, msecs_to_jiffies(500));
1029}
1030
1031static void via_init_mmc_host(struct via_crdr_mmc_host *host)
1032{
1033 struct mmc_host *mmc = host->mmc;
1034 void __iomem *addrbase;
1035 u32 lenreg;
1036 u32 status;
1037
1038 init_timer(&host->timer);
1039 host->timer.data = (unsigned long)host;
1040 host->timer.function = via_sdc_timeout;
1041
1042 spin_lock_init(&host->lock);
1043
1044 mmc->f_min = VIA_CRDR_MIN_CLOCK;
1045 mmc->f_max = VIA_CRDR_MAX_CLOCK;
1046 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1047 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED;
1048 mmc->ops = &via_sdc_ops;
1049
1050 /*Hardware cannot do scatter lists*/
1051 mmc->max_segs = 1;
1052
1053 mmc->max_blk_size = VIA_CRDR_MAX_BLOCK_LENGTH;
1054 mmc->max_blk_count = VIA_CRDR_MAX_BLOCK_COUNT;
1055
1056 mmc->max_seg_size = mmc->max_blk_size * mmc->max_blk_count;
1057 mmc->max_req_size = mmc->max_seg_size;
1058
1059 INIT_WORK(&host->carddet_work, via_sdc_card_detect);
1060
1061 tasklet_init(&host->finish_tasklet, via_sdc_tasklet_finish,
1062 (unsigned long)host);
1063
1064 addrbase = host->sdhc_mmiobase;
1065 writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
1066 msleep(1);
1067
1068 lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
1069 writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN);
1070
1071 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1072 status &= VIA_CRDR_SDSTS_W1C_MASK;
1073 writew(status, addrbase + VIA_CRDR_SDSTATUS);
1074
1075 status = readw(addrbase + VIA_CRDR_SDSTATUS2);
1076 status |= VIA_CRDR_SDSTS_CFE;
1077 writew(status, addrbase + VIA_CRDR_SDSTATUS2);
1078
1079 writeb(0x0, addrbase + VIA_CRDR_SDEXTCTRL);
1080
1081 writel(VIA_CRDR_SDACTIVE_INTMASK, addrbase + VIA_CRDR_SDINTMASK);
1082 msleep(1);
1083}
1084
1085static int __devinit via_sd_probe(struct pci_dev *pcidev,
1086 const struct pci_device_id *id)
1087{
1088 struct mmc_host *mmc;
1089 struct via_crdr_mmc_host *sdhost;
1090 u32 base, len;
1091 u8 gatt;
1092 int ret;
1093
1094 pr_info(DRV_NAME
1095 ": VIA SDMMC controller found at %s [%04x:%04x] (rev %x)\n",
1096 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1097 (int)pcidev->revision);
1098
1099 ret = pci_enable_device(pcidev);
1100 if (ret)
1101 return ret;
1102
1103 ret = pci_request_regions(pcidev, DRV_NAME);
1104 if (ret)
1105 goto disable;
1106
1107 pci_write_config_byte(pcidev, VIA_CRDR_PCI_WORK_MODE, 0);
1108 pci_write_config_byte(pcidev, VIA_CRDR_PCI_DBG_MODE, 0);
1109
1110 mmc = mmc_alloc_host(sizeof(struct via_crdr_mmc_host), &pcidev->dev);
1111 if (!mmc) {
1112 ret = -ENOMEM;
1113 goto release;
1114 }
1115
1116 sdhost = mmc_priv(mmc);
1117 sdhost->mmc = mmc;
1118 dev_set_drvdata(&pcidev->dev, sdhost);
1119
1120 len = pci_resource_len(pcidev, 0);
1121 base = pci_resource_start(pcidev, 0);
1122 sdhost->mmiobase = ioremap_nocache(base, len);
1123 if (!sdhost->mmiobase) {
1124 ret = -ENOMEM;
1125 goto free_mmc_host;
1126 }
1127
1128 sdhost->sdhc_mmiobase =
1129 sdhost->mmiobase + VIA_CRDR_SDC_OFF;
1130 sdhost->ddma_mmiobase =
1131 sdhost->mmiobase + VIA_CRDR_DDMA_OFF;
1132 sdhost->pcictrl_mmiobase =
1133 sdhost->mmiobase + VIA_CRDR_PCICTRL_OFF;
1134
1135 sdhost->power = MMC_VDD_165_195;
1136
1137 gatt = VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON;
1138 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1139 via_pwron_sleep(sdhost);
1140 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
1141 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1142 msleep(3);
1143
1144 via_init_mmc_host(sdhost);
1145
1146 ret =
1147 request_irq(pcidev->irq, via_sdc_isr, IRQF_SHARED, DRV_NAME,
1148 sdhost);
1149 if (ret)
1150 goto unmap;
1151
1152 writeb(VIA_CRDR_PCIINTCTRL_SDCIRQEN,
1153 sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL);
1154 writeb(VIA_CRDR_PCITMOCTRL_1024MS,
1155 sdhost->pcictrl_mmiobase + VIA_CRDR_PCITMOCTRL);
1156
1157 /* device-specific quirks */
1158 if (pcidev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
1159 pcidev->subsystem_device == 0x3891)
1160 sdhost->quirks = VIA_CRDR_QUIRK_300MS_PWRDELAY;
1161
1162 mmc_add_host(mmc);
1163
1164 return 0;
1165
1166unmap:
1167 iounmap(sdhost->mmiobase);
1168free_mmc_host:
1169 dev_set_drvdata(&pcidev->dev, NULL);
1170 mmc_free_host(mmc);
1171release:
1172 pci_release_regions(pcidev);
1173disable:
1174 pci_disable_device(pcidev);
1175
1176 return ret;
1177}
1178
1179static void __devexit via_sd_remove(struct pci_dev *pcidev)
1180{
1181 struct via_crdr_mmc_host *sdhost = pci_get_drvdata(pcidev);
1182 unsigned long flags;
1183 u8 gatt;
1184
1185 spin_lock_irqsave(&sdhost->lock, flags);
1186
1187 /* Ensure we don't accept more commands from mmc layer */
1188 sdhost->reject = 1;
1189
1190 /* Disable generating further interrupts */
1191 writeb(0x0, sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL);
1192 mmiowb();
1193
1194 if (sdhost->mrq) {
1195 pr_err("%s: Controller removed during "
1196 "transfer\n", mmc_hostname(sdhost->mmc));
1197
1198 /* make sure all DMA is stopped */
1199 writel(VIA_CRDR_DMACTRL_SFTRST,
1200 sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL);
1201 mmiowb();
1202 sdhost->mrq->cmd->error = -ENOMEDIUM;
1203 if (sdhost->mrq->stop)
1204 sdhost->mrq->stop->error = -ENOMEDIUM;
1205 tasklet_schedule(&sdhost->finish_tasklet);
1206 }
1207 spin_unlock_irqrestore(&sdhost->lock, flags);
1208
1209 mmc_remove_host(sdhost->mmc);
1210
1211 free_irq(pcidev->irq, sdhost);
1212
1213 del_timer_sync(&sdhost->timer);
1214
1215 tasklet_kill(&sdhost->finish_tasklet);
1216
1217 /* switch off power */
1218 gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1219 gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON;
1220 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1221
1222 iounmap(sdhost->mmiobase);
1223 dev_set_drvdata(&pcidev->dev, NULL);
1224 mmc_free_host(sdhost->mmc);
1225 pci_release_regions(pcidev);
1226 pci_disable_device(pcidev);
1227
1228 pr_info(DRV_NAME
1229 ": VIA SDMMC controller at %s [%04x:%04x] has been removed\n",
1230 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1231}
1232
1233#ifdef CONFIG_PM
1234
1235static void via_init_sdc_pm(struct via_crdr_mmc_host *host)
1236{
1237 struct sdhcreg *pm_sdhcreg;
1238 void __iomem *addrbase;
1239 u32 lenreg;
1240 u16 status;
1241
1242 pm_sdhcreg = &(host->pm_sdhc_reg);
1243 addrbase = host->sdhc_mmiobase;
1244
1245 writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
1246
1247 lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
1248 writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN);
1249
1250 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1251 status &= VIA_CRDR_SDSTS_W1C_MASK;
1252 writew(status, addrbase + VIA_CRDR_SDSTATUS);
1253
1254 status = readw(addrbase + VIA_CRDR_SDSTATUS2);
1255 status |= VIA_CRDR_SDSTS_CFE;
1256 writew(status, addrbase + VIA_CRDR_SDSTATUS2);
1257
1258 writel(pm_sdhcreg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL);
1259 writel(pm_sdhcreg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG);
1260 writel(pm_sdhcreg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK);
1261 writel(pm_sdhcreg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO);
1262 writel(pm_sdhcreg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL);
1263 writel(pm_sdhcreg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL);
1264
1265 via_print_pcictrl(host);
1266 via_print_sdchc(host);
1267}
1268
1269static int via_sd_suspend(struct pci_dev *pcidev, pm_message_t state)
1270{
1271 struct via_crdr_mmc_host *host;
1272 int ret = 0;
1273
1274 host = pci_get_drvdata(pcidev);
1275
1276 via_save_pcictrlreg(host);
1277 via_save_sdcreg(host);
1278
1279 ret = mmc_suspend_host(host->mmc);
1280
1281 pci_save_state(pcidev);
1282 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1283 pci_disable_device(pcidev);
1284 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1285
1286 return ret;
1287}
1288
1289static int via_sd_resume(struct pci_dev *pcidev)
1290{
1291 struct via_crdr_mmc_host *sdhost;
1292 int ret = 0;
1293 u8 gatt;
1294
1295 sdhost = pci_get_drvdata(pcidev);
1296
1297 gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON;
1298 if (sdhost->power == MMC_VDD_165_195)
1299 gatt &= ~VIA_CRDR_PCICLKGATT_3V3;
1300 else
1301 gatt |= VIA_CRDR_PCICLKGATT_3V3;
1302 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1303 via_pwron_sleep(sdhost);
1304 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
1305 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1306 msleep(3);
1307
1308 msleep(100);
1309
1310 pci_set_power_state(pcidev, PCI_D0);
1311 pci_restore_state(pcidev);
1312 ret = pci_enable_device(pcidev);
1313 if (ret)
1314 return ret;
1315
1316 via_restore_pcictrlreg(sdhost);
1317 via_init_sdc_pm(sdhost);
1318
1319 ret = mmc_resume_host(sdhost->mmc);
1320
1321 return ret;
1322}
1323
1324#else /* CONFIG_PM */
1325
1326#define via_sd_suspend NULL
1327#define via_sd_resume NULL
1328
1329#endif /* CONFIG_PM */
1330
1331static struct pci_driver via_sd_driver = {
1332 .name = DRV_NAME,
1333 .id_table = via_ids,
1334 .probe = via_sd_probe,
1335 .remove = __devexit_p(via_sd_remove),
1336 .suspend = via_sd_suspend,
1337 .resume = via_sd_resume,
1338};
1339
1340static int __init via_sd_drv_init(void)
1341{
1342 pr_info(DRV_NAME ": VIA SD/MMC Card Reader driver "
1343 "(C) 2008 VIA Technologies, Inc.\n");
1344
1345 return pci_register_driver(&via_sd_driver);
1346}
1347
1348static void __exit via_sd_drv_exit(void)
1349{
1350 pci_unregister_driver(&via_sd_driver);
1351}
1352
1353module_init(via_sd_drv_init);
1354module_exit(via_sd_drv_exit);
1355
1356MODULE_LICENSE("GPL");
1357MODULE_AUTHOR("VIA Technologies Inc.");
1358MODULE_DESCRIPTION("VIA SD/MMC Card Interface driver");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/mmc/host/via-sdmmc.c - VIA SD/MMC Card Reader driver
4 * Copyright (c) 2008, VIA Technologies Inc. All Rights Reserved.
5 */
6
7#include <linux/pci.h>
8#include <linux/module.h>
9#include <linux/dma-mapping.h>
10#include <linux/highmem.h>
11#include <linux/delay.h>
12#include <linux/interrupt.h>
13
14#include <linux/mmc/host.h>
15
16#define DRV_NAME "via_sdmmc"
17
18#define PCI_DEVICE_ID_VIA_9530 0x9530
19
20#define VIA_CRDR_SDC_OFF 0x200
21#define VIA_CRDR_DDMA_OFF 0x400
22#define VIA_CRDR_PCICTRL_OFF 0x600
23
24#define VIA_CRDR_MIN_CLOCK 375000
25#define VIA_CRDR_MAX_CLOCK 48000000
26
27/*
28 * PCI registers
29 */
30
31#define VIA_CRDR_PCI_WORK_MODE 0x40
32#define VIA_CRDR_PCI_DBG_MODE 0x41
33
34/*
35 * SDC MMIO Registers
36 */
37
38#define VIA_CRDR_SDCTRL 0x0
39#define VIA_CRDR_SDCTRL_START 0x01
40#define VIA_CRDR_SDCTRL_WRITE 0x04
41#define VIA_CRDR_SDCTRL_SINGLE_WR 0x10
42#define VIA_CRDR_SDCTRL_SINGLE_RD 0x20
43#define VIA_CRDR_SDCTRL_MULTI_WR 0x30
44#define VIA_CRDR_SDCTRL_MULTI_RD 0x40
45#define VIA_CRDR_SDCTRL_STOP 0x70
46
47#define VIA_CRDR_SDCTRL_RSP_NONE 0x0
48#define VIA_CRDR_SDCTRL_RSP_R1 0x10000
49#define VIA_CRDR_SDCTRL_RSP_R2 0x20000
50#define VIA_CRDR_SDCTRL_RSP_R3 0x30000
51#define VIA_CRDR_SDCTRL_RSP_R1B 0x90000
52
53#define VIA_CRDR_SDCARG 0x4
54
55#define VIA_CRDR_SDBUSMODE 0x8
56#define VIA_CRDR_SDMODE_4BIT 0x02
57#define VIA_CRDR_SDMODE_CLK_ON 0x40
58
59#define VIA_CRDR_SDBLKLEN 0xc
60/*
61 * Bit 0 -Bit 10 : Block length. So, the maximum block length should be 2048.
62 * Bit 11 - Bit 13 : Reserved.
63 * GPIDET : Select GPI pin to detect card, GPI means CR_CD# in top design.
64 * INTEN : Enable SD host interrupt.
65 * Bit 16 - Bit 31 : Block count. So, the maximun block count should be 65536.
66 */
67#define VIA_CRDR_SDBLKLEN_GPIDET 0x2000
68#define VIA_CRDR_SDBLKLEN_INTEN 0x8000
69#define VIA_CRDR_MAX_BLOCK_COUNT 65536
70#define VIA_CRDR_MAX_BLOCK_LENGTH 2048
71
72#define VIA_CRDR_SDRESP0 0x10
73#define VIA_CRDR_SDRESP1 0x14
74#define VIA_CRDR_SDRESP2 0x18
75#define VIA_CRDR_SDRESP3 0x1c
76
77#define VIA_CRDR_SDCURBLKCNT 0x20
78
79#define VIA_CRDR_SDINTMASK 0x24
80/*
81 * MBDIE : Multiple Blocks transfer Done Interrupt Enable
82 * BDDIE : Block Data transfer Done Interrupt Enable
83 * CIRIE : Card Insertion or Removal Interrupt Enable
84 * CRDIE : Command-Response transfer Done Interrupt Enable
85 * CRTOIE : Command-Response response TimeOut Interrupt Enable
86 * ASCRDIE : Auto Stop Command-Response transfer Done Interrupt Enable
87 * DTIE : Data access Timeout Interrupt Enable
88 * SCIE : reSponse CRC error Interrupt Enable
89 * RCIE : Read data CRC error Interrupt Enable
90 * WCIE : Write data CRC error Interrupt Enable
91 */
92#define VIA_CRDR_SDINTMASK_MBDIE 0x10
93#define VIA_CRDR_SDINTMASK_BDDIE 0x20
94#define VIA_CRDR_SDINTMASK_CIRIE 0x80
95#define VIA_CRDR_SDINTMASK_CRDIE 0x200
96#define VIA_CRDR_SDINTMASK_CRTOIE 0x400
97#define VIA_CRDR_SDINTMASK_ASCRDIE 0x800
98#define VIA_CRDR_SDINTMASK_DTIE 0x1000
99#define VIA_CRDR_SDINTMASK_SCIE 0x2000
100#define VIA_CRDR_SDINTMASK_RCIE 0x4000
101#define VIA_CRDR_SDINTMASK_WCIE 0x8000
102
103#define VIA_CRDR_SDACTIVE_INTMASK \
104 (VIA_CRDR_SDINTMASK_MBDIE | VIA_CRDR_SDINTMASK_CIRIE \
105 | VIA_CRDR_SDINTMASK_CRDIE | VIA_CRDR_SDINTMASK_CRTOIE \
106 | VIA_CRDR_SDINTMASK_DTIE | VIA_CRDR_SDINTMASK_SCIE \
107 | VIA_CRDR_SDINTMASK_RCIE | VIA_CRDR_SDINTMASK_WCIE)
108
109#define VIA_CRDR_SDSTATUS 0x28
110/*
111 * CECC : Reserved
112 * WP : SD card Write Protect status
113 * SLOTD : Reserved
114 * SLOTG : SD SLOT status(Gpi pin status)
115 * MBD : Multiple Blocks transfer Done interrupt status
116 * BDD : Block Data transfer Done interrupt status
117 * CD : Reserved
118 * CIR : Card Insertion or Removal interrupt detected on GPI pin
119 * IO : Reserved
120 * CRD : Command-Response transfer Done interrupt status
121 * CRTO : Command-Response response TimeOut interrupt status
122 * ASCRDIE : Auto Stop Command-Response transfer Done interrupt status
123 * DT : Data access Timeout interrupt status
124 * SC : reSponse CRC error interrupt status
125 * RC : Read data CRC error interrupt status
126 * WC : Write data CRC error interrupt status
127 */
128#define VIA_CRDR_SDSTS_CECC 0x01
129#define VIA_CRDR_SDSTS_WP 0x02
130#define VIA_CRDR_SDSTS_SLOTD 0x04
131#define VIA_CRDR_SDSTS_SLOTG 0x08
132#define VIA_CRDR_SDSTS_MBD 0x10
133#define VIA_CRDR_SDSTS_BDD 0x20
134#define VIA_CRDR_SDSTS_CD 0x40
135#define VIA_CRDR_SDSTS_CIR 0x80
136#define VIA_CRDR_SDSTS_IO 0x100
137#define VIA_CRDR_SDSTS_CRD 0x200
138#define VIA_CRDR_SDSTS_CRTO 0x400
139#define VIA_CRDR_SDSTS_ASCRDIE 0x800
140#define VIA_CRDR_SDSTS_DT 0x1000
141#define VIA_CRDR_SDSTS_SC 0x2000
142#define VIA_CRDR_SDSTS_RC 0x4000
143#define VIA_CRDR_SDSTS_WC 0x8000
144
145#define VIA_CRDR_SDSTS_IGN_MASK\
146 (VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_IO)
147#define VIA_CRDR_SDSTS_INT_MASK \
148 (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD | VIA_CRDR_SDSTS_CD \
149 | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_IO | VIA_CRDR_SDSTS_CRD \
150 | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \
151 | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
152#define VIA_CRDR_SDSTS_W1C_MASK \
153 (VIA_CRDR_SDSTS_CECC | VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_BDD \
154 | VIA_CRDR_SDSTS_CD | VIA_CRDR_SDSTS_CIR | VIA_CRDR_SDSTS_CRD \
155 | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_ASCRDIE | VIA_CRDR_SDSTS_DT \
156 | VIA_CRDR_SDSTS_SC | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
157#define VIA_CRDR_SDSTS_CMD_MASK \
158 (VIA_CRDR_SDSTS_CRD | VIA_CRDR_SDSTS_CRTO | VIA_CRDR_SDSTS_SC)
159#define VIA_CRDR_SDSTS_DATA_MASK\
160 (VIA_CRDR_SDSTS_MBD | VIA_CRDR_SDSTS_DT \
161 | VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC)
162
163#define VIA_CRDR_SDSTATUS2 0x2a
164/*
165 * CFE : Enable SD host automatic Clock FReezing
166 */
167#define VIA_CRDR_SDSTS_CFE 0x80
168
169#define VIA_CRDR_SDRSPTMO 0x2C
170
171#define VIA_CRDR_SDCLKSEL 0x30
172
173#define VIA_CRDR_SDEXTCTRL 0x34
174#define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SD 0x01
175#define VIS_CRDR_SDEXTCTRL_SHIFT_9 0x02
176#define VIS_CRDR_SDEXTCTRL_MMC_8BIT 0x04
177#define VIS_CRDR_SDEXTCTRL_RELD_BLK 0x08
178#define VIS_CRDR_SDEXTCTRL_BAD_CMDA 0x10
179#define VIS_CRDR_SDEXTCTRL_BAD_DATA 0x20
180#define VIS_CRDR_SDEXTCTRL_AUTOSTOP_SPI 0x40
181#define VIA_CRDR_SDEXTCTRL_HISPD 0x80
182/* 0x38-0xFF reserved */
183
184/*
185 * Data DMA Control Registers
186 */
187
188#define VIA_CRDR_DMABASEADD 0x0
189#define VIA_CRDR_DMACOUNTER 0x4
190
191#define VIA_CRDR_DMACTRL 0x8
192/*
193 * DIR :Transaction Direction
194 * 0 : From card to memory
195 * 1 : From memory to card
196 */
197#define VIA_CRDR_DMACTRL_DIR 0x100
198#define VIA_CRDR_DMACTRL_ENIRQ 0x10000
199#define VIA_CRDR_DMACTRL_SFTRST 0x1000000
200
201#define VIA_CRDR_DMASTS 0xc
202
203#define VIA_CRDR_DMASTART 0x10
204/*0x14-0xFF reserved*/
205
206/*
207 * PCI Control Registers
208 */
209
210/*0x0 - 0x1 reserved*/
211#define VIA_CRDR_PCICLKGATT 0x2
212/*
213 * SFTRST :
214 * 0 : Soft reset all the controller and it will be de-asserted automatically
215 * 1 : Soft reset is de-asserted
216 */
217#define VIA_CRDR_PCICLKGATT_SFTRST 0x01
218/*
219 * 3V3 : Pad power select
220 * 0 : 1.8V
221 * 1 : 3.3V
222 * NOTE : No mater what the actual value should be, this bit always
223 * read as 0. This is a hardware bug.
224 */
225#define VIA_CRDR_PCICLKGATT_3V3 0x10
226/*
227 * PAD_PWRON : Pad Power on/off select
228 * 0 : Power off
229 * 1 : Power on
230 * NOTE : No mater what the actual value should be, this bit always
231 * read as 0. This is a hardware bug.
232 */
233#define VIA_CRDR_PCICLKGATT_PAD_PWRON 0x20
234
235#define VIA_CRDR_PCISDCCLK 0x5
236
237#define VIA_CRDR_PCIDMACLK 0x7
238#define VIA_CRDR_PCIDMACLK_SDC 0x2
239
240#define VIA_CRDR_PCIINTCTRL 0x8
241#define VIA_CRDR_PCIINTCTRL_SDCIRQEN 0x04
242
243#define VIA_CRDR_PCIINTSTATUS 0x9
244#define VIA_CRDR_PCIINTSTATUS_SDC 0x04
245
246#define VIA_CRDR_PCITMOCTRL 0xa
247#define VIA_CRDR_PCITMOCTRL_NO 0x0
248#define VIA_CRDR_PCITMOCTRL_32US 0x1
249#define VIA_CRDR_PCITMOCTRL_256US 0x2
250#define VIA_CRDR_PCITMOCTRL_1024US 0x3
251#define VIA_CRDR_PCITMOCTRL_256MS 0x4
252#define VIA_CRDR_PCITMOCTRL_512MS 0x5
253#define VIA_CRDR_PCITMOCTRL_1024MS 0x6
254
255/*0xB-0xFF reserved*/
256
257enum PCI_HOST_CLK_CONTROL {
258 PCI_CLK_375K = 0x03,
259 PCI_CLK_8M = 0x04,
260 PCI_CLK_12M = 0x00,
261 PCI_CLK_16M = 0x05,
262 PCI_CLK_24M = 0x01,
263 PCI_CLK_33M = 0x06,
264 PCI_CLK_48M = 0x02
265};
266
267struct sdhcreg {
268 u32 sdcontrol_reg;
269 u32 sdcmdarg_reg;
270 u32 sdbusmode_reg;
271 u32 sdblklen_reg;
272 u32 sdresp_reg[4];
273 u32 sdcurblkcnt_reg;
274 u32 sdintmask_reg;
275 u32 sdstatus_reg;
276 u32 sdrsptmo_reg;
277 u32 sdclksel_reg;
278 u32 sdextctrl_reg;
279};
280
281struct pcictrlreg {
282 u8 reserve[2];
283 u8 pciclkgat_reg;
284 u8 pcinfcclk_reg;
285 u8 pcimscclk_reg;
286 u8 pcisdclk_reg;
287 u8 pcicaclk_reg;
288 u8 pcidmaclk_reg;
289 u8 pciintctrl_reg;
290 u8 pciintstatus_reg;
291 u8 pcitmoctrl_reg;
292 u8 Resv;
293};
294
295struct via_crdr_mmc_host {
296 struct mmc_host *mmc;
297 struct mmc_request *mrq;
298 struct mmc_command *cmd;
299 struct mmc_data *data;
300
301 void __iomem *mmiobase;
302 void __iomem *sdhc_mmiobase;
303 void __iomem *ddma_mmiobase;
304 void __iomem *pcictrl_mmiobase;
305
306 struct pcictrlreg pm_pcictrl_reg;
307 struct sdhcreg pm_sdhc_reg;
308
309 struct work_struct carddet_work;
310 struct tasklet_struct finish_tasklet;
311
312 struct timer_list timer;
313 spinlock_t lock;
314 u8 power;
315 int reject;
316 unsigned int quirks;
317};
318
319/* some devices need a very long delay for power to stabilize */
320#define VIA_CRDR_QUIRK_300MS_PWRDELAY 0x0001
321
322static const struct pci_device_id via_ids[] = {
323 {PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_9530,
324 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0,},
325 {0,}
326};
327
328MODULE_DEVICE_TABLE(pci, via_ids);
329
330static void via_print_sdchc(struct via_crdr_mmc_host *host)
331{
332 void __iomem *addrbase = host->sdhc_mmiobase;
333
334 pr_debug("SDC MMIO Registers:\n");
335 pr_debug("SDCONTROL=%08x, SDCMDARG=%08x, SDBUSMODE=%08x\n",
336 readl(addrbase + VIA_CRDR_SDCTRL),
337 readl(addrbase + VIA_CRDR_SDCARG),
338 readl(addrbase + VIA_CRDR_SDBUSMODE));
339 pr_debug("SDBLKLEN=%08x, SDCURBLKCNT=%08x, SDINTMASK=%08x\n",
340 readl(addrbase + VIA_CRDR_SDBLKLEN),
341 readl(addrbase + VIA_CRDR_SDCURBLKCNT),
342 readl(addrbase + VIA_CRDR_SDINTMASK));
343 pr_debug("SDSTATUS=%08x, SDCLKSEL=%08x, SDEXTCTRL=%08x\n",
344 readl(addrbase + VIA_CRDR_SDSTATUS),
345 readl(addrbase + VIA_CRDR_SDCLKSEL),
346 readl(addrbase + VIA_CRDR_SDEXTCTRL));
347}
348
349static void via_print_pcictrl(struct via_crdr_mmc_host *host)
350{
351 void __iomem *addrbase = host->pcictrl_mmiobase;
352
353 pr_debug("PCI Control Registers:\n");
354 pr_debug("PCICLKGATT=%02x, PCISDCCLK=%02x, PCIDMACLK=%02x\n",
355 readb(addrbase + VIA_CRDR_PCICLKGATT),
356 readb(addrbase + VIA_CRDR_PCISDCCLK),
357 readb(addrbase + VIA_CRDR_PCIDMACLK));
358 pr_debug("PCIINTCTRL=%02x, PCIINTSTATUS=%02x\n",
359 readb(addrbase + VIA_CRDR_PCIINTCTRL),
360 readb(addrbase + VIA_CRDR_PCIINTSTATUS));
361}
362
363static void via_save_pcictrlreg(struct via_crdr_mmc_host *host)
364{
365 struct pcictrlreg *pm_pcictrl_reg;
366 void __iomem *addrbase;
367
368 pm_pcictrl_reg = &(host->pm_pcictrl_reg);
369 addrbase = host->pcictrl_mmiobase;
370
371 pm_pcictrl_reg->pciclkgat_reg = readb(addrbase + VIA_CRDR_PCICLKGATT);
372 pm_pcictrl_reg->pciclkgat_reg |=
373 VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON;
374 pm_pcictrl_reg->pcisdclk_reg = readb(addrbase + VIA_CRDR_PCISDCCLK);
375 pm_pcictrl_reg->pcidmaclk_reg = readb(addrbase + VIA_CRDR_PCIDMACLK);
376 pm_pcictrl_reg->pciintctrl_reg = readb(addrbase + VIA_CRDR_PCIINTCTRL);
377 pm_pcictrl_reg->pciintstatus_reg =
378 readb(addrbase + VIA_CRDR_PCIINTSTATUS);
379 pm_pcictrl_reg->pcitmoctrl_reg = readb(addrbase + VIA_CRDR_PCITMOCTRL);
380}
381
382static void via_restore_pcictrlreg(struct via_crdr_mmc_host *host)
383{
384 struct pcictrlreg *pm_pcictrl_reg;
385 void __iomem *addrbase;
386
387 pm_pcictrl_reg = &(host->pm_pcictrl_reg);
388 addrbase = host->pcictrl_mmiobase;
389
390 writeb(pm_pcictrl_reg->pciclkgat_reg, addrbase + VIA_CRDR_PCICLKGATT);
391 writeb(pm_pcictrl_reg->pcisdclk_reg, addrbase + VIA_CRDR_PCISDCCLK);
392 writeb(pm_pcictrl_reg->pcidmaclk_reg, addrbase + VIA_CRDR_PCIDMACLK);
393 writeb(pm_pcictrl_reg->pciintctrl_reg, addrbase + VIA_CRDR_PCIINTCTRL);
394 writeb(pm_pcictrl_reg->pciintstatus_reg,
395 addrbase + VIA_CRDR_PCIINTSTATUS);
396 writeb(pm_pcictrl_reg->pcitmoctrl_reg, addrbase + VIA_CRDR_PCITMOCTRL);
397}
398
399static void via_save_sdcreg(struct via_crdr_mmc_host *host)
400{
401 struct sdhcreg *pm_sdhc_reg;
402 void __iomem *addrbase;
403
404 pm_sdhc_reg = &(host->pm_sdhc_reg);
405 addrbase = host->sdhc_mmiobase;
406
407 pm_sdhc_reg->sdcontrol_reg = readl(addrbase + VIA_CRDR_SDCTRL);
408 pm_sdhc_reg->sdcmdarg_reg = readl(addrbase + VIA_CRDR_SDCARG);
409 pm_sdhc_reg->sdbusmode_reg = readl(addrbase + VIA_CRDR_SDBUSMODE);
410 pm_sdhc_reg->sdblklen_reg = readl(addrbase + VIA_CRDR_SDBLKLEN);
411 pm_sdhc_reg->sdcurblkcnt_reg = readl(addrbase + VIA_CRDR_SDCURBLKCNT);
412 pm_sdhc_reg->sdintmask_reg = readl(addrbase + VIA_CRDR_SDINTMASK);
413 pm_sdhc_reg->sdstatus_reg = readl(addrbase + VIA_CRDR_SDSTATUS);
414 pm_sdhc_reg->sdrsptmo_reg = readl(addrbase + VIA_CRDR_SDRSPTMO);
415 pm_sdhc_reg->sdclksel_reg = readl(addrbase + VIA_CRDR_SDCLKSEL);
416 pm_sdhc_reg->sdextctrl_reg = readl(addrbase + VIA_CRDR_SDEXTCTRL);
417}
418
419static void via_restore_sdcreg(struct via_crdr_mmc_host *host)
420{
421 struct sdhcreg *pm_sdhc_reg;
422 void __iomem *addrbase;
423
424 pm_sdhc_reg = &(host->pm_sdhc_reg);
425 addrbase = host->sdhc_mmiobase;
426
427 writel(pm_sdhc_reg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL);
428 writel(pm_sdhc_reg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG);
429 writel(pm_sdhc_reg->sdbusmode_reg, addrbase + VIA_CRDR_SDBUSMODE);
430 writel(pm_sdhc_reg->sdblklen_reg, addrbase + VIA_CRDR_SDBLKLEN);
431 writel(pm_sdhc_reg->sdcurblkcnt_reg, addrbase + VIA_CRDR_SDCURBLKCNT);
432 writel(pm_sdhc_reg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK);
433 writel(pm_sdhc_reg->sdstatus_reg, addrbase + VIA_CRDR_SDSTATUS);
434 writel(pm_sdhc_reg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO);
435 writel(pm_sdhc_reg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL);
436 writel(pm_sdhc_reg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL);
437}
438
439static void via_pwron_sleep(struct via_crdr_mmc_host *sdhost)
440{
441 if (sdhost->quirks & VIA_CRDR_QUIRK_300MS_PWRDELAY)
442 msleep(300);
443 else
444 msleep(3);
445}
446
447static void via_set_ddma(struct via_crdr_mmc_host *host,
448 dma_addr_t dmaaddr, u32 count, int dir, int enirq)
449{
450 void __iomem *addrbase;
451 u32 ctrl_data = 0;
452
453 if (enirq)
454 ctrl_data |= VIA_CRDR_DMACTRL_ENIRQ;
455
456 if (dir)
457 ctrl_data |= VIA_CRDR_DMACTRL_DIR;
458
459 addrbase = host->ddma_mmiobase;
460
461 writel(dmaaddr, addrbase + VIA_CRDR_DMABASEADD);
462 writel(count, addrbase + VIA_CRDR_DMACOUNTER);
463 writel(ctrl_data, addrbase + VIA_CRDR_DMACTRL);
464 writel(0x01, addrbase + VIA_CRDR_DMASTART);
465
466 /* It seems that our DMA can not work normally with 375kHz clock */
467 /* FIXME: don't brute-force 8MHz but use PIO at 375kHz !! */
468 addrbase = host->pcictrl_mmiobase;
469 if (readb(addrbase + VIA_CRDR_PCISDCCLK) == PCI_CLK_375K) {
470 dev_info(host->mmc->parent, "forcing card speed to 8MHz\n");
471 writeb(PCI_CLK_8M, addrbase + VIA_CRDR_PCISDCCLK);
472 }
473}
474
475static void via_sdc_preparedata(struct via_crdr_mmc_host *host,
476 struct mmc_data *data)
477{
478 void __iomem *addrbase;
479 u32 blk_reg;
480 int count;
481
482 WARN_ON(host->data);
483
484 /* Sanity checks */
485 BUG_ON(data->blksz > host->mmc->max_blk_size);
486 BUG_ON(data->blocks > host->mmc->max_blk_count);
487
488 host->data = data;
489
490 count = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
491 ((data->flags & MMC_DATA_READ) ?
492 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE));
493 BUG_ON(count != 1);
494
495 via_set_ddma(host, sg_dma_address(data->sg), sg_dma_len(data->sg),
496 (data->flags & MMC_DATA_WRITE) ? 1 : 0, 1);
497
498 addrbase = host->sdhc_mmiobase;
499
500 blk_reg = data->blksz - 1;
501 blk_reg |= VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
502 blk_reg |= (data->blocks) << 16;
503
504 writel(blk_reg, addrbase + VIA_CRDR_SDBLKLEN);
505}
506
507static void via_sdc_get_response(struct via_crdr_mmc_host *host,
508 struct mmc_command *cmd)
509{
510 void __iomem *addrbase = host->sdhc_mmiobase;
511 u32 dwdata0 = readl(addrbase + VIA_CRDR_SDRESP0);
512 u32 dwdata1 = readl(addrbase + VIA_CRDR_SDRESP1);
513 u32 dwdata2 = readl(addrbase + VIA_CRDR_SDRESP2);
514 u32 dwdata3 = readl(addrbase + VIA_CRDR_SDRESP3);
515
516 if (cmd->flags & MMC_RSP_136) {
517 cmd->resp[0] = ((u8) (dwdata1)) |
518 (((u8) (dwdata0 >> 24)) << 8) |
519 (((u8) (dwdata0 >> 16)) << 16) |
520 (((u8) (dwdata0 >> 8)) << 24);
521
522 cmd->resp[1] = ((u8) (dwdata2)) |
523 (((u8) (dwdata1 >> 24)) << 8) |
524 (((u8) (dwdata1 >> 16)) << 16) |
525 (((u8) (dwdata1 >> 8)) << 24);
526
527 cmd->resp[2] = ((u8) (dwdata3)) |
528 (((u8) (dwdata2 >> 24)) << 8) |
529 (((u8) (dwdata2 >> 16)) << 16) |
530 (((u8) (dwdata2 >> 8)) << 24);
531
532 cmd->resp[3] = 0xff |
533 ((((u8) (dwdata3 >> 24))) << 8) |
534 (((u8) (dwdata3 >> 16)) << 16) |
535 (((u8) (dwdata3 >> 8)) << 24);
536 } else {
537 dwdata0 >>= 8;
538 cmd->resp[0] = ((dwdata0 & 0xff) << 24) |
539 (((dwdata0 >> 8) & 0xff) << 16) |
540 (((dwdata0 >> 16) & 0xff) << 8) | (dwdata1 & 0xff);
541
542 dwdata1 >>= 8;
543 cmd->resp[1] = ((dwdata1 & 0xff) << 24) |
544 (((dwdata1 >> 8) & 0xff) << 16) |
545 (((dwdata1 >> 16) & 0xff) << 8);
546 }
547}
548
549static void via_sdc_send_command(struct via_crdr_mmc_host *host,
550 struct mmc_command *cmd)
551{
552 void __iomem *addrbase;
553 struct mmc_data *data;
554 u32 cmdctrl = 0;
555
556 WARN_ON(host->cmd);
557
558 data = cmd->data;
559 mod_timer(&host->timer, jiffies + HZ);
560 host->cmd = cmd;
561
562 /*Command index*/
563 cmdctrl = cmd->opcode << 8;
564
565 /*Response type*/
566 switch (mmc_resp_type(cmd)) {
567 case MMC_RSP_NONE:
568 cmdctrl |= VIA_CRDR_SDCTRL_RSP_NONE;
569 break;
570 case MMC_RSP_R1:
571 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1;
572 break;
573 case MMC_RSP_R1B:
574 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R1B;
575 break;
576 case MMC_RSP_R2:
577 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R2;
578 break;
579 case MMC_RSP_R3:
580 cmdctrl |= VIA_CRDR_SDCTRL_RSP_R3;
581 break;
582 default:
583 pr_err("%s: cmd->flag is not valid\n", mmc_hostname(host->mmc));
584 break;
585 }
586
587 if (!(cmd->data))
588 goto nodata;
589
590 via_sdc_preparedata(host, data);
591
592 /*Command control*/
593 if (data->blocks > 1) {
594 if (data->flags & MMC_DATA_WRITE) {
595 cmdctrl |= VIA_CRDR_SDCTRL_WRITE;
596 cmdctrl |= VIA_CRDR_SDCTRL_MULTI_WR;
597 } else {
598 cmdctrl |= VIA_CRDR_SDCTRL_MULTI_RD;
599 }
600 } else {
601 if (data->flags & MMC_DATA_WRITE) {
602 cmdctrl |= VIA_CRDR_SDCTRL_WRITE;
603 cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_WR;
604 } else {
605 cmdctrl |= VIA_CRDR_SDCTRL_SINGLE_RD;
606 }
607 }
608
609nodata:
610 if (cmd == host->mrq->stop)
611 cmdctrl |= VIA_CRDR_SDCTRL_STOP;
612
613 cmdctrl |= VIA_CRDR_SDCTRL_START;
614
615 addrbase = host->sdhc_mmiobase;
616 writel(cmd->arg, addrbase + VIA_CRDR_SDCARG);
617 writel(cmdctrl, addrbase + VIA_CRDR_SDCTRL);
618}
619
620static void via_sdc_finish_data(struct via_crdr_mmc_host *host)
621{
622 struct mmc_data *data;
623
624 BUG_ON(!host->data);
625
626 data = host->data;
627 host->data = NULL;
628
629 if (data->error)
630 data->bytes_xfered = 0;
631 else
632 data->bytes_xfered = data->blocks * data->blksz;
633
634 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
635 ((data->flags & MMC_DATA_READ) ?
636 PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE));
637
638 if (data->stop)
639 via_sdc_send_command(host, data->stop);
640 else
641 tasklet_schedule(&host->finish_tasklet);
642}
643
644static void via_sdc_finish_command(struct via_crdr_mmc_host *host)
645{
646 via_sdc_get_response(host, host->cmd);
647
648 host->cmd->error = 0;
649
650 if (!host->cmd->data)
651 tasklet_schedule(&host->finish_tasklet);
652
653 host->cmd = NULL;
654}
655
656static void via_sdc_request(struct mmc_host *mmc, struct mmc_request *mrq)
657{
658 void __iomem *addrbase;
659 struct via_crdr_mmc_host *host;
660 unsigned long flags;
661 u16 status;
662
663 host = mmc_priv(mmc);
664
665 spin_lock_irqsave(&host->lock, flags);
666
667 addrbase = host->pcictrl_mmiobase;
668 writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK);
669
670 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
671 status &= VIA_CRDR_SDSTS_W1C_MASK;
672 writew(status, host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
673
674 WARN_ON(host->mrq != NULL);
675 host->mrq = mrq;
676
677 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
678 if (!(status & VIA_CRDR_SDSTS_SLOTG) || host->reject) {
679 host->mrq->cmd->error = -ENOMEDIUM;
680 tasklet_schedule(&host->finish_tasklet);
681 } else {
682 via_sdc_send_command(host, mrq->cmd);
683 }
684
685 spin_unlock_irqrestore(&host->lock, flags);
686}
687
688static void via_sdc_set_power(struct via_crdr_mmc_host *host,
689 unsigned short power, unsigned int on)
690{
691 unsigned long flags;
692 u8 gatt;
693
694 spin_lock_irqsave(&host->lock, flags);
695
696 host->power = (1 << power);
697
698 gatt = readb(host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
699 if (host->power == MMC_VDD_165_195)
700 gatt &= ~VIA_CRDR_PCICLKGATT_3V3;
701 else
702 gatt |= VIA_CRDR_PCICLKGATT_3V3;
703 if (on)
704 gatt |= VIA_CRDR_PCICLKGATT_PAD_PWRON;
705 else
706 gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON;
707 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
708
709 spin_unlock_irqrestore(&host->lock, flags);
710
711 via_pwron_sleep(host);
712}
713
714static void via_sdc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
715{
716 struct via_crdr_mmc_host *host;
717 unsigned long flags;
718 void __iomem *addrbase;
719 u32 org_data, sdextctrl;
720 u8 clock;
721
722 host = mmc_priv(mmc);
723
724 spin_lock_irqsave(&host->lock, flags);
725
726 addrbase = host->sdhc_mmiobase;
727 org_data = readl(addrbase + VIA_CRDR_SDBUSMODE);
728 sdextctrl = readl(addrbase + VIA_CRDR_SDEXTCTRL);
729
730 if (ios->bus_width == MMC_BUS_WIDTH_1)
731 org_data &= ~VIA_CRDR_SDMODE_4BIT;
732 else
733 org_data |= VIA_CRDR_SDMODE_4BIT;
734
735 if (ios->power_mode == MMC_POWER_OFF)
736 org_data &= ~VIA_CRDR_SDMODE_CLK_ON;
737 else
738 org_data |= VIA_CRDR_SDMODE_CLK_ON;
739
740 if (ios->timing == MMC_TIMING_SD_HS)
741 sdextctrl |= VIA_CRDR_SDEXTCTRL_HISPD;
742 else
743 sdextctrl &= ~VIA_CRDR_SDEXTCTRL_HISPD;
744
745 writel(org_data, addrbase + VIA_CRDR_SDBUSMODE);
746 writel(sdextctrl, addrbase + VIA_CRDR_SDEXTCTRL);
747
748 if (ios->clock >= 48000000)
749 clock = PCI_CLK_48M;
750 else if (ios->clock >= 33000000)
751 clock = PCI_CLK_33M;
752 else if (ios->clock >= 24000000)
753 clock = PCI_CLK_24M;
754 else if (ios->clock >= 16000000)
755 clock = PCI_CLK_16M;
756 else if (ios->clock >= 12000000)
757 clock = PCI_CLK_12M;
758 else if (ios->clock >= 8000000)
759 clock = PCI_CLK_8M;
760 else
761 clock = PCI_CLK_375K;
762
763 addrbase = host->pcictrl_mmiobase;
764 if (readb(addrbase + VIA_CRDR_PCISDCCLK) != clock)
765 writeb(clock, addrbase + VIA_CRDR_PCISDCCLK);
766
767 spin_unlock_irqrestore(&host->lock, flags);
768
769 if (ios->power_mode != MMC_POWER_OFF)
770 via_sdc_set_power(host, ios->vdd, 1);
771 else
772 via_sdc_set_power(host, ios->vdd, 0);
773}
774
775static int via_sdc_get_ro(struct mmc_host *mmc)
776{
777 struct via_crdr_mmc_host *host;
778 unsigned long flags;
779 u16 status;
780
781 host = mmc_priv(mmc);
782
783 spin_lock_irqsave(&host->lock, flags);
784
785 status = readw(host->sdhc_mmiobase + VIA_CRDR_SDSTATUS);
786
787 spin_unlock_irqrestore(&host->lock, flags);
788
789 return !(status & VIA_CRDR_SDSTS_WP);
790}
791
792static const struct mmc_host_ops via_sdc_ops = {
793 .request = via_sdc_request,
794 .set_ios = via_sdc_set_ios,
795 .get_ro = via_sdc_get_ro,
796};
797
798static void via_reset_pcictrl(struct via_crdr_mmc_host *host)
799{
800 unsigned long flags;
801 u8 gatt;
802
803 spin_lock_irqsave(&host->lock, flags);
804
805 via_save_pcictrlreg(host);
806 via_save_sdcreg(host);
807
808 spin_unlock_irqrestore(&host->lock, flags);
809
810 gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON;
811 if (host->power == MMC_VDD_165_195)
812 gatt &= VIA_CRDR_PCICLKGATT_3V3;
813 else
814 gatt |= VIA_CRDR_PCICLKGATT_3V3;
815 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
816 via_pwron_sleep(host);
817 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
818 writeb(gatt, host->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
819 msleep(3);
820
821 spin_lock_irqsave(&host->lock, flags);
822
823 via_restore_pcictrlreg(host);
824 via_restore_sdcreg(host);
825
826 spin_unlock_irqrestore(&host->lock, flags);
827}
828
829static void via_sdc_cmd_isr(struct via_crdr_mmc_host *host, u16 intmask)
830{
831 BUG_ON(intmask == 0);
832
833 if (!host->cmd) {
834 pr_err("%s: Got command interrupt 0x%x even "
835 "though no command operation was in progress.\n",
836 mmc_hostname(host->mmc), intmask);
837 return;
838 }
839
840 if (intmask & VIA_CRDR_SDSTS_CRTO)
841 host->cmd->error = -ETIMEDOUT;
842 else if (intmask & VIA_CRDR_SDSTS_SC)
843 host->cmd->error = -EILSEQ;
844
845 if (host->cmd->error)
846 tasklet_schedule(&host->finish_tasklet);
847 else if (intmask & VIA_CRDR_SDSTS_CRD)
848 via_sdc_finish_command(host);
849}
850
851static void via_sdc_data_isr(struct via_crdr_mmc_host *host, u16 intmask)
852{
853 BUG_ON(intmask == 0);
854
855 if (intmask & VIA_CRDR_SDSTS_DT)
856 host->data->error = -ETIMEDOUT;
857 else if (intmask & (VIA_CRDR_SDSTS_RC | VIA_CRDR_SDSTS_WC))
858 host->data->error = -EILSEQ;
859
860 via_sdc_finish_data(host);
861}
862
863static irqreturn_t via_sdc_isr(int irq, void *dev_id)
864{
865 struct via_crdr_mmc_host *sdhost = dev_id;
866 void __iomem *addrbase;
867 u8 pci_status;
868 u16 sd_status;
869 irqreturn_t result;
870
871 if (!sdhost)
872 return IRQ_NONE;
873
874 spin_lock(&sdhost->lock);
875
876 addrbase = sdhost->pcictrl_mmiobase;
877 pci_status = readb(addrbase + VIA_CRDR_PCIINTSTATUS);
878 if (!(pci_status & VIA_CRDR_PCIINTSTATUS_SDC)) {
879 result = IRQ_NONE;
880 goto out;
881 }
882
883 addrbase = sdhost->sdhc_mmiobase;
884 sd_status = readw(addrbase + VIA_CRDR_SDSTATUS);
885 sd_status &= VIA_CRDR_SDSTS_INT_MASK;
886 sd_status &= ~VIA_CRDR_SDSTS_IGN_MASK;
887 if (!sd_status) {
888 result = IRQ_NONE;
889 goto out;
890 }
891
892 if (sd_status & VIA_CRDR_SDSTS_CIR) {
893 writew(sd_status & VIA_CRDR_SDSTS_CIR,
894 addrbase + VIA_CRDR_SDSTATUS);
895
896 schedule_work(&sdhost->carddet_work);
897 }
898
899 sd_status &= ~VIA_CRDR_SDSTS_CIR;
900 if (sd_status & VIA_CRDR_SDSTS_CMD_MASK) {
901 writew(sd_status & VIA_CRDR_SDSTS_CMD_MASK,
902 addrbase + VIA_CRDR_SDSTATUS);
903 via_sdc_cmd_isr(sdhost, sd_status & VIA_CRDR_SDSTS_CMD_MASK);
904 }
905 if (sd_status & VIA_CRDR_SDSTS_DATA_MASK) {
906 writew(sd_status & VIA_CRDR_SDSTS_DATA_MASK,
907 addrbase + VIA_CRDR_SDSTATUS);
908 via_sdc_data_isr(sdhost, sd_status & VIA_CRDR_SDSTS_DATA_MASK);
909 }
910
911 sd_status &= ~(VIA_CRDR_SDSTS_CMD_MASK | VIA_CRDR_SDSTS_DATA_MASK);
912 if (sd_status) {
913 pr_err("%s: Unexpected interrupt 0x%x\n",
914 mmc_hostname(sdhost->mmc), sd_status);
915 writew(sd_status, addrbase + VIA_CRDR_SDSTATUS);
916 }
917
918 result = IRQ_HANDLED;
919
920out:
921 spin_unlock(&sdhost->lock);
922
923 return result;
924}
925
926static void via_sdc_timeout(struct timer_list *t)
927{
928 struct via_crdr_mmc_host *sdhost;
929 unsigned long flags;
930
931 sdhost = from_timer(sdhost, t, timer);
932
933 spin_lock_irqsave(&sdhost->lock, flags);
934
935 if (sdhost->mrq) {
936 pr_err("%s: Timeout waiting for hardware interrupt."
937 "cmd:0x%x\n", mmc_hostname(sdhost->mmc),
938 sdhost->mrq->cmd->opcode);
939
940 if (sdhost->data) {
941 writel(VIA_CRDR_DMACTRL_SFTRST,
942 sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL);
943 sdhost->data->error = -ETIMEDOUT;
944 via_sdc_finish_data(sdhost);
945 } else {
946 if (sdhost->cmd)
947 sdhost->cmd->error = -ETIMEDOUT;
948 else
949 sdhost->mrq->cmd->error = -ETIMEDOUT;
950 tasklet_schedule(&sdhost->finish_tasklet);
951 }
952 }
953
954 spin_unlock_irqrestore(&sdhost->lock, flags);
955}
956
957static void via_sdc_tasklet_finish(unsigned long param)
958{
959 struct via_crdr_mmc_host *host;
960 unsigned long flags;
961 struct mmc_request *mrq;
962
963 host = (struct via_crdr_mmc_host *)param;
964
965 spin_lock_irqsave(&host->lock, flags);
966
967 del_timer(&host->timer);
968 mrq = host->mrq;
969 host->mrq = NULL;
970 host->cmd = NULL;
971 host->data = NULL;
972
973 spin_unlock_irqrestore(&host->lock, flags);
974
975 mmc_request_done(host->mmc, mrq);
976}
977
978static void via_sdc_card_detect(struct work_struct *work)
979{
980 struct via_crdr_mmc_host *host;
981 void __iomem *addrbase;
982 unsigned long flags;
983 u16 status;
984
985 host = container_of(work, struct via_crdr_mmc_host, carddet_work);
986
987 addrbase = host->ddma_mmiobase;
988 writel(VIA_CRDR_DMACTRL_SFTRST, addrbase + VIA_CRDR_DMACTRL);
989
990 spin_lock_irqsave(&host->lock, flags);
991
992 addrbase = host->pcictrl_mmiobase;
993 writeb(VIA_CRDR_PCIDMACLK_SDC, addrbase + VIA_CRDR_PCIDMACLK);
994
995 addrbase = host->sdhc_mmiobase;
996 status = readw(addrbase + VIA_CRDR_SDSTATUS);
997 if (!(status & VIA_CRDR_SDSTS_SLOTG)) {
998 if (host->mrq) {
999 pr_err("%s: Card removed during transfer!\n",
1000 mmc_hostname(host->mmc));
1001 host->mrq->cmd->error = -ENOMEDIUM;
1002 tasklet_schedule(&host->finish_tasklet);
1003 }
1004
1005 spin_unlock_irqrestore(&host->lock, flags);
1006
1007 via_reset_pcictrl(host);
1008
1009 spin_lock_irqsave(&host->lock, flags);
1010 }
1011
1012 spin_unlock_irqrestore(&host->lock, flags);
1013
1014 via_print_pcictrl(host);
1015 via_print_sdchc(host);
1016
1017 mmc_detect_change(host->mmc, msecs_to_jiffies(500));
1018}
1019
1020static void via_init_mmc_host(struct via_crdr_mmc_host *host)
1021{
1022 struct mmc_host *mmc = host->mmc;
1023 void __iomem *addrbase;
1024 u32 lenreg;
1025 u32 status;
1026
1027 timer_setup(&host->timer, via_sdc_timeout, 0);
1028
1029 spin_lock_init(&host->lock);
1030
1031 mmc->f_min = VIA_CRDR_MIN_CLOCK;
1032 mmc->f_max = VIA_CRDR_MAX_CLOCK;
1033 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
1034 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SD_HIGHSPEED;
1035 mmc->ops = &via_sdc_ops;
1036
1037 /*Hardware cannot do scatter lists*/
1038 mmc->max_segs = 1;
1039
1040 mmc->max_blk_size = VIA_CRDR_MAX_BLOCK_LENGTH;
1041 mmc->max_blk_count = VIA_CRDR_MAX_BLOCK_COUNT;
1042
1043 mmc->max_seg_size = mmc->max_blk_size * mmc->max_blk_count;
1044 mmc->max_req_size = mmc->max_seg_size;
1045
1046 INIT_WORK(&host->carddet_work, via_sdc_card_detect);
1047
1048 tasklet_init(&host->finish_tasklet, via_sdc_tasklet_finish,
1049 (unsigned long)host);
1050
1051 addrbase = host->sdhc_mmiobase;
1052 writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
1053 msleep(1);
1054
1055 lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
1056 writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN);
1057
1058 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1059 status &= VIA_CRDR_SDSTS_W1C_MASK;
1060 writew(status, addrbase + VIA_CRDR_SDSTATUS);
1061
1062 status = readw(addrbase + VIA_CRDR_SDSTATUS2);
1063 status |= VIA_CRDR_SDSTS_CFE;
1064 writew(status, addrbase + VIA_CRDR_SDSTATUS2);
1065
1066 writeb(0x0, addrbase + VIA_CRDR_SDEXTCTRL);
1067
1068 writel(VIA_CRDR_SDACTIVE_INTMASK, addrbase + VIA_CRDR_SDINTMASK);
1069 msleep(1);
1070}
1071
1072static int via_sd_probe(struct pci_dev *pcidev,
1073 const struct pci_device_id *id)
1074{
1075 struct mmc_host *mmc;
1076 struct via_crdr_mmc_host *sdhost;
1077 u32 base, len;
1078 u8 gatt;
1079 int ret;
1080
1081 pr_info(DRV_NAME
1082 ": VIA SDMMC controller found at %s [%04x:%04x] (rev %x)\n",
1083 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
1084 (int)pcidev->revision);
1085
1086 ret = pci_enable_device(pcidev);
1087 if (ret)
1088 return ret;
1089
1090 ret = pci_request_regions(pcidev, DRV_NAME);
1091 if (ret)
1092 goto disable;
1093
1094 pci_write_config_byte(pcidev, VIA_CRDR_PCI_WORK_MODE, 0);
1095 pci_write_config_byte(pcidev, VIA_CRDR_PCI_DBG_MODE, 0);
1096
1097 mmc = mmc_alloc_host(sizeof(struct via_crdr_mmc_host), &pcidev->dev);
1098 if (!mmc) {
1099 ret = -ENOMEM;
1100 goto release;
1101 }
1102
1103 sdhost = mmc_priv(mmc);
1104 sdhost->mmc = mmc;
1105 dev_set_drvdata(&pcidev->dev, sdhost);
1106
1107 len = pci_resource_len(pcidev, 0);
1108 base = pci_resource_start(pcidev, 0);
1109 sdhost->mmiobase = ioremap_nocache(base, len);
1110 if (!sdhost->mmiobase) {
1111 ret = -ENOMEM;
1112 goto free_mmc_host;
1113 }
1114
1115 sdhost->sdhc_mmiobase =
1116 sdhost->mmiobase + VIA_CRDR_SDC_OFF;
1117 sdhost->ddma_mmiobase =
1118 sdhost->mmiobase + VIA_CRDR_DDMA_OFF;
1119 sdhost->pcictrl_mmiobase =
1120 sdhost->mmiobase + VIA_CRDR_PCICTRL_OFF;
1121
1122 sdhost->power = MMC_VDD_165_195;
1123
1124 gatt = VIA_CRDR_PCICLKGATT_3V3 | VIA_CRDR_PCICLKGATT_PAD_PWRON;
1125 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1126 via_pwron_sleep(sdhost);
1127 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
1128 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1129 msleep(3);
1130
1131 via_init_mmc_host(sdhost);
1132
1133 ret =
1134 request_irq(pcidev->irq, via_sdc_isr, IRQF_SHARED, DRV_NAME,
1135 sdhost);
1136 if (ret)
1137 goto unmap;
1138
1139 writeb(VIA_CRDR_PCIINTCTRL_SDCIRQEN,
1140 sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL);
1141 writeb(VIA_CRDR_PCITMOCTRL_1024MS,
1142 sdhost->pcictrl_mmiobase + VIA_CRDR_PCITMOCTRL);
1143
1144 /* device-specific quirks */
1145 if (pcidev->subsystem_vendor == PCI_VENDOR_ID_LENOVO &&
1146 pcidev->subsystem_device == 0x3891)
1147 sdhost->quirks = VIA_CRDR_QUIRK_300MS_PWRDELAY;
1148
1149 mmc_add_host(mmc);
1150
1151 return 0;
1152
1153unmap:
1154 iounmap(sdhost->mmiobase);
1155free_mmc_host:
1156 dev_set_drvdata(&pcidev->dev, NULL);
1157 mmc_free_host(mmc);
1158release:
1159 pci_release_regions(pcidev);
1160disable:
1161 pci_disable_device(pcidev);
1162
1163 return ret;
1164}
1165
1166static void via_sd_remove(struct pci_dev *pcidev)
1167{
1168 struct via_crdr_mmc_host *sdhost = pci_get_drvdata(pcidev);
1169 unsigned long flags;
1170 u8 gatt;
1171
1172 spin_lock_irqsave(&sdhost->lock, flags);
1173
1174 /* Ensure we don't accept more commands from mmc layer */
1175 sdhost->reject = 1;
1176
1177 /* Disable generating further interrupts */
1178 writeb(0x0, sdhost->pcictrl_mmiobase + VIA_CRDR_PCIINTCTRL);
1179
1180 if (sdhost->mrq) {
1181 pr_err("%s: Controller removed during "
1182 "transfer\n", mmc_hostname(sdhost->mmc));
1183
1184 /* make sure all DMA is stopped */
1185 writel(VIA_CRDR_DMACTRL_SFTRST,
1186 sdhost->ddma_mmiobase + VIA_CRDR_DMACTRL);
1187 sdhost->mrq->cmd->error = -ENOMEDIUM;
1188 if (sdhost->mrq->stop)
1189 sdhost->mrq->stop->error = -ENOMEDIUM;
1190 tasklet_schedule(&sdhost->finish_tasklet);
1191 }
1192 spin_unlock_irqrestore(&sdhost->lock, flags);
1193
1194 mmc_remove_host(sdhost->mmc);
1195
1196 free_irq(pcidev->irq, sdhost);
1197
1198 del_timer_sync(&sdhost->timer);
1199
1200 tasklet_kill(&sdhost->finish_tasklet);
1201
1202 /* switch off power */
1203 gatt = readb(sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1204 gatt &= ~VIA_CRDR_PCICLKGATT_PAD_PWRON;
1205 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1206
1207 iounmap(sdhost->mmiobase);
1208 dev_set_drvdata(&pcidev->dev, NULL);
1209 mmc_free_host(sdhost->mmc);
1210 pci_release_regions(pcidev);
1211 pci_disable_device(pcidev);
1212
1213 pr_info(DRV_NAME
1214 ": VIA SDMMC controller at %s [%04x:%04x] has been removed\n",
1215 pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device);
1216}
1217
1218#ifdef CONFIG_PM
1219
1220static void via_init_sdc_pm(struct via_crdr_mmc_host *host)
1221{
1222 struct sdhcreg *pm_sdhcreg;
1223 void __iomem *addrbase;
1224 u32 lenreg;
1225 u16 status;
1226
1227 pm_sdhcreg = &(host->pm_sdhc_reg);
1228 addrbase = host->sdhc_mmiobase;
1229
1230 writel(0x0, addrbase + VIA_CRDR_SDINTMASK);
1231
1232 lenreg = VIA_CRDR_SDBLKLEN_GPIDET | VIA_CRDR_SDBLKLEN_INTEN;
1233 writel(lenreg, addrbase + VIA_CRDR_SDBLKLEN);
1234
1235 status = readw(addrbase + VIA_CRDR_SDSTATUS);
1236 status &= VIA_CRDR_SDSTS_W1C_MASK;
1237 writew(status, addrbase + VIA_CRDR_SDSTATUS);
1238
1239 status = readw(addrbase + VIA_CRDR_SDSTATUS2);
1240 status |= VIA_CRDR_SDSTS_CFE;
1241 writew(status, addrbase + VIA_CRDR_SDSTATUS2);
1242
1243 writel(pm_sdhcreg->sdcontrol_reg, addrbase + VIA_CRDR_SDCTRL);
1244 writel(pm_sdhcreg->sdcmdarg_reg, addrbase + VIA_CRDR_SDCARG);
1245 writel(pm_sdhcreg->sdintmask_reg, addrbase + VIA_CRDR_SDINTMASK);
1246 writel(pm_sdhcreg->sdrsptmo_reg, addrbase + VIA_CRDR_SDRSPTMO);
1247 writel(pm_sdhcreg->sdclksel_reg, addrbase + VIA_CRDR_SDCLKSEL);
1248 writel(pm_sdhcreg->sdextctrl_reg, addrbase + VIA_CRDR_SDEXTCTRL);
1249
1250 via_print_pcictrl(host);
1251 via_print_sdchc(host);
1252}
1253
1254static int via_sd_suspend(struct pci_dev *pcidev, pm_message_t state)
1255{
1256 struct via_crdr_mmc_host *host;
1257
1258 host = pci_get_drvdata(pcidev);
1259
1260 via_save_pcictrlreg(host);
1261 via_save_sdcreg(host);
1262
1263 pci_save_state(pcidev);
1264 pci_enable_wake(pcidev, pci_choose_state(pcidev, state), 0);
1265 pci_disable_device(pcidev);
1266 pci_set_power_state(pcidev, pci_choose_state(pcidev, state));
1267
1268 return 0;
1269}
1270
1271static int via_sd_resume(struct pci_dev *pcidev)
1272{
1273 struct via_crdr_mmc_host *sdhost;
1274 int ret = 0;
1275 u8 gatt;
1276
1277 sdhost = pci_get_drvdata(pcidev);
1278
1279 gatt = VIA_CRDR_PCICLKGATT_PAD_PWRON;
1280 if (sdhost->power == MMC_VDD_165_195)
1281 gatt &= ~VIA_CRDR_PCICLKGATT_3V3;
1282 else
1283 gatt |= VIA_CRDR_PCICLKGATT_3V3;
1284 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1285 via_pwron_sleep(sdhost);
1286 gatt |= VIA_CRDR_PCICLKGATT_SFTRST;
1287 writeb(gatt, sdhost->pcictrl_mmiobase + VIA_CRDR_PCICLKGATT);
1288 msleep(3);
1289
1290 msleep(100);
1291
1292 pci_set_power_state(pcidev, PCI_D0);
1293 pci_restore_state(pcidev);
1294 ret = pci_enable_device(pcidev);
1295 if (ret)
1296 return ret;
1297
1298 via_restore_pcictrlreg(sdhost);
1299 via_init_sdc_pm(sdhost);
1300
1301 return ret;
1302}
1303
1304#else /* CONFIG_PM */
1305
1306#define via_sd_suspend NULL
1307#define via_sd_resume NULL
1308
1309#endif /* CONFIG_PM */
1310
1311static struct pci_driver via_sd_driver = {
1312 .name = DRV_NAME,
1313 .id_table = via_ids,
1314 .probe = via_sd_probe,
1315 .remove = via_sd_remove,
1316 .suspend = via_sd_suspend,
1317 .resume = via_sd_resume,
1318};
1319
1320module_pci_driver(via_sd_driver);
1321
1322MODULE_LICENSE("GPL");
1323MODULE_AUTHOR("VIA Technologies Inc.");
1324MODULE_DESCRIPTION("VIA SD/MMC Card Interface driver");