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  1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * Copyright (C) 2019 Genesys Logic, Inc.
  4 *
  5 * Authors: Ben Chuang <ben.chuang@genesyslogic.com.tw>
  6 *
  7 * Version: v0.9.0 (2019-08-08)
  8 */
  9
 10#include <linux/bitfield.h>
 11#include <linux/bits.h>
 12#include <linux/pci.h>
 13#include <linux/mmc/mmc.h>
 14#include <linux/delay.h>
 15#include "sdhci.h"
 16#include "sdhci-pci.h"
 17#include "cqhci.h"
 18
 19/*  Genesys Logic extra registers */
 20#define SDHCI_GLI_9750_WT         0x800
 21#define   SDHCI_GLI_9750_WT_EN      BIT(0)
 22#define   GLI_9750_WT_EN_ON	    0x1
 23#define   GLI_9750_WT_EN_OFF	    0x0
 24
 25#define SDHCI_GLI_9750_CFG2          0x848
 26#define   SDHCI_GLI_9750_CFG2_L1DLY    GENMASK(28, 24)
 27#define   GLI_9750_CFG2_L1DLY_VALUE    0x1F
 28
 29#define SDHCI_GLI_9750_DRIVING      0x860
 30#define   SDHCI_GLI_9750_DRIVING_1    GENMASK(11, 0)
 31#define   SDHCI_GLI_9750_DRIVING_2    GENMASK(27, 26)
 32#define   GLI_9750_DRIVING_1_VALUE    0xFFF
 33#define   GLI_9750_DRIVING_2_VALUE    0x3
 34#define   SDHCI_GLI_9750_SEL_1        BIT(29)
 35#define   SDHCI_GLI_9750_SEL_2        BIT(31)
 36#define   SDHCI_GLI_9750_ALL_RST      (BIT(24)|BIT(25)|BIT(28)|BIT(30))
 37
 38#define SDHCI_GLI_9750_PLL	      0x864
 39#define   SDHCI_GLI_9750_PLL_LDIV       GENMASK(9, 0)
 40#define   SDHCI_GLI_9750_PLL_PDIV       GENMASK(14, 12)
 41#define   SDHCI_GLI_9750_PLL_DIR        BIT(15)
 42#define   SDHCI_GLI_9750_PLL_TX2_INV    BIT(23)
 43#define   SDHCI_GLI_9750_PLL_TX2_DLY    GENMASK(22, 20)
 44#define   GLI_9750_PLL_TX2_INV_VALUE    0x1
 45#define   GLI_9750_PLL_TX2_DLY_VALUE    0x0
 46#define   SDHCI_GLI_9750_PLLSSC_STEP    GENMASK(28, 24)
 47#define   SDHCI_GLI_9750_PLLSSC_EN      BIT(31)
 48
 49#define SDHCI_GLI_9750_PLLSSC        0x86C
 50#define   SDHCI_GLI_9750_PLLSSC_PPM    GENMASK(31, 16)
 51
 52#define SDHCI_GLI_9750_SW_CTRL      0x874
 53#define   SDHCI_GLI_9750_SW_CTRL_4    GENMASK(7, 6)
 54#define   GLI_9750_SW_CTRL_4_VALUE    0x3
 55
 56#define SDHCI_GLI_9750_MISC            0x878
 57#define   SDHCI_GLI_9750_MISC_TX1_INV    BIT(2)
 58#define   SDHCI_GLI_9750_MISC_RX_INV     BIT(3)
 59#define   SDHCI_GLI_9750_MISC_TX1_DLY    GENMASK(6, 4)
 60#define   GLI_9750_MISC_TX1_INV_VALUE    0x0
 61#define   GLI_9750_MISC_RX_INV_ON        0x1
 62#define   GLI_9750_MISC_RX_INV_OFF       0x0
 63#define   GLI_9750_MISC_RX_INV_VALUE     GLI_9750_MISC_RX_INV_OFF
 64#define   GLI_9750_MISC_TX1_DLY_VALUE    0x5
 65
 66#define SDHCI_GLI_9750_TUNING_CONTROL	          0x540
 67#define   SDHCI_GLI_9750_TUNING_CONTROL_EN          BIT(4)
 68#define   GLI_9750_TUNING_CONTROL_EN_ON             0x1
 69#define   GLI_9750_TUNING_CONTROL_EN_OFF            0x0
 70#define   SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_1    BIT(16)
 71#define   SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_2    GENMASK(20, 19)
 72#define   GLI_9750_TUNING_CONTROL_GLITCH_1_VALUE    0x1
 73#define   GLI_9750_TUNING_CONTROL_GLITCH_2_VALUE    0x2
 74
 75#define SDHCI_GLI_9750_TUNING_PARAMETERS           0x544
 76#define   SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY    GENMASK(2, 0)
 77#define   GLI_9750_TUNING_PARAMETERS_RX_DLY_VALUE    0x1
 78
 79#define SDHCI_GLI_9763E_CTRL_HS400  0x7
 80
 81#define SDHCI_GLI_9763E_HS400_ES_REG      0x52C
 82#define   SDHCI_GLI_9763E_HS400_ES_BIT      BIT(8)
 83
 84#define PCIE_GLI_9763E_VHS	 0x884
 85#define   GLI_9763E_VHS_REV	   GENMASK(19, 16)
 86#define   GLI_9763E_VHS_REV_R      0x0
 87#define   GLI_9763E_VHS_REV_M      0x1
 88#define   GLI_9763E_VHS_REV_W      0x2
 89#define PCIE_GLI_9763E_MB	 0x888
 90#define   GLI_9763E_MB_CMDQ_OFF	   BIT(19)
 91#define   GLI_9763E_MB_ERP_ON      BIT(7)
 92#define PCIE_GLI_9763E_SCR	 0x8E0
 93#define   GLI_9763E_SCR_AXI_REQ	   BIT(9)
 94
 95#define PCIE_GLI_9763E_CFG2      0x8A4
 96#define   GLI_9763E_CFG2_L1DLY     GENMASK(28, 19)
 97#define   GLI_9763E_CFG2_L1DLY_MID 0x54
 98
 99#define PCIE_GLI_9763E_MMC_CTRL  0x960
100#define   GLI_9763E_HS400_SLOW     BIT(3)
101
102#define PCIE_GLI_9763E_CLKRXDLY  0x934
103#define   GLI_9763E_HS400_RXDLY    GENMASK(31, 28)
104#define   GLI_9763E_HS400_RXDLY_5  0x5
105
106#define SDHCI_GLI_9763E_CQE_BASE_ADDR	 0x200
107#define GLI_9763E_CQE_TRNS_MODE	   (SDHCI_TRNS_MULTI | \
108				    SDHCI_TRNS_BLK_CNT_EN | \
109				    SDHCI_TRNS_DMA)
110
111#define PCI_GLI_9755_WT       0x800
112#define   PCI_GLI_9755_WT_EN    BIT(0)
113#define   GLI_9755_WT_EN_ON     0x1
114#define   GLI_9755_WT_EN_OFF    0x0
115
116#define PCI_GLI_9755_PECONF   0x44
117#define   PCI_GLI_9755_LFCLK    GENMASK(14, 12)
118#define   PCI_GLI_9755_DMACLK   BIT(29)
119
120#define PCI_GLI_9755_CFG2          0x48
121#define   PCI_GLI_9755_CFG2_L1DLY    GENMASK(28, 24)
122#define   GLI_9755_CFG2_L1DLY_VALUE  0x1F
123
124#define PCI_GLI_9755_PLL            0x64
125#define   PCI_GLI_9755_PLL_LDIV       GENMASK(9, 0)
126#define   PCI_GLI_9755_PLL_PDIV       GENMASK(14, 12)
127#define   PCI_GLI_9755_PLL_DIR        BIT(15)
128#define   PCI_GLI_9755_PLLSSC_STEP    GENMASK(28, 24)
129#define   PCI_GLI_9755_PLLSSC_EN      BIT(31)
130
131#define PCI_GLI_9755_PLLSSC        0x68
132#define   PCI_GLI_9755_PLLSSC_PPM    GENMASK(15, 0)
133
134#define PCI_GLI_9755_SerDes  0x70
135#define PCI_GLI_9755_SCP_DIS   BIT(19)
136
137#define GLI_MAX_TUNING_LOOP 40
138
139/* Genesys Logic chipset */
140static inline void gl9750_wt_on(struct sdhci_host *host)
141{
142	u32 wt_value;
143	u32 wt_enable;
144
145	wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
146	wt_enable = FIELD_GET(SDHCI_GLI_9750_WT_EN, wt_value);
147
148	if (wt_enable == GLI_9750_WT_EN_ON)
149		return;
150
151	wt_value &= ~SDHCI_GLI_9750_WT_EN;
152	wt_value |= FIELD_PREP(SDHCI_GLI_9750_WT_EN, GLI_9750_WT_EN_ON);
153
154	sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
155}
156
157static inline void gl9750_wt_off(struct sdhci_host *host)
158{
159	u32 wt_value;
160	u32 wt_enable;
161
162	wt_value = sdhci_readl(host, SDHCI_GLI_9750_WT);
163	wt_enable = FIELD_GET(SDHCI_GLI_9750_WT_EN, wt_value);
164
165	if (wt_enable == GLI_9750_WT_EN_OFF)
166		return;
167
168	wt_value &= ~SDHCI_GLI_9750_WT_EN;
169	wt_value |= FIELD_PREP(SDHCI_GLI_9750_WT_EN, GLI_9750_WT_EN_OFF);
170
171	sdhci_writel(host, wt_value, SDHCI_GLI_9750_WT);
172}
173
174static void gli_set_9750(struct sdhci_host *host)
175{
176	u32 driving_value;
177	u32 pll_value;
178	u32 sw_ctrl_value;
179	u32 misc_value;
180	u32 parameter_value;
181	u32 control_value;
182	u16 ctrl2;
183
184	gl9750_wt_on(host);
185
186	driving_value = sdhci_readl(host, SDHCI_GLI_9750_DRIVING);
187	pll_value = sdhci_readl(host, SDHCI_GLI_9750_PLL);
188	sw_ctrl_value = sdhci_readl(host, SDHCI_GLI_9750_SW_CTRL);
189	misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
190	parameter_value = sdhci_readl(host, SDHCI_GLI_9750_TUNING_PARAMETERS);
191	control_value = sdhci_readl(host, SDHCI_GLI_9750_TUNING_CONTROL);
192
193	driving_value &= ~(SDHCI_GLI_9750_DRIVING_1);
194	driving_value &= ~(SDHCI_GLI_9750_DRIVING_2);
195	driving_value |= FIELD_PREP(SDHCI_GLI_9750_DRIVING_1,
196				    GLI_9750_DRIVING_1_VALUE);
197	driving_value |= FIELD_PREP(SDHCI_GLI_9750_DRIVING_2,
198				    GLI_9750_DRIVING_2_VALUE);
199	driving_value &= ~(SDHCI_GLI_9750_SEL_1|SDHCI_GLI_9750_SEL_2|SDHCI_GLI_9750_ALL_RST);
200	driving_value |= SDHCI_GLI_9750_SEL_2;
201	sdhci_writel(host, driving_value, SDHCI_GLI_9750_DRIVING);
202
203	sw_ctrl_value &= ~SDHCI_GLI_9750_SW_CTRL_4;
204	sw_ctrl_value |= FIELD_PREP(SDHCI_GLI_9750_SW_CTRL_4,
205				    GLI_9750_SW_CTRL_4_VALUE);
206	sdhci_writel(host, sw_ctrl_value, SDHCI_GLI_9750_SW_CTRL);
207
208	/* reset the tuning flow after reinit and before starting tuning */
209	pll_value &= ~SDHCI_GLI_9750_PLL_TX2_INV;
210	pll_value &= ~SDHCI_GLI_9750_PLL_TX2_DLY;
211	pll_value |= FIELD_PREP(SDHCI_GLI_9750_PLL_TX2_INV,
212				GLI_9750_PLL_TX2_INV_VALUE);
213	pll_value |= FIELD_PREP(SDHCI_GLI_9750_PLL_TX2_DLY,
214				GLI_9750_PLL_TX2_DLY_VALUE);
215
216	misc_value &= ~SDHCI_GLI_9750_MISC_TX1_INV;
217	misc_value &= ~SDHCI_GLI_9750_MISC_RX_INV;
218	misc_value &= ~SDHCI_GLI_9750_MISC_TX1_DLY;
219	misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_TX1_INV,
220				 GLI_9750_MISC_TX1_INV_VALUE);
221	misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_RX_INV,
222				 GLI_9750_MISC_RX_INV_VALUE);
223	misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_TX1_DLY,
224				 GLI_9750_MISC_TX1_DLY_VALUE);
225
226	parameter_value &= ~SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY;
227	parameter_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_PARAMETERS_RX_DLY,
228				      GLI_9750_TUNING_PARAMETERS_RX_DLY_VALUE);
229
230	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_1;
231	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_2;
232	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_1,
233				    GLI_9750_TUNING_CONTROL_GLITCH_1_VALUE);
234	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_GLITCH_2,
235				    GLI_9750_TUNING_CONTROL_GLITCH_2_VALUE);
236
237	sdhci_writel(host, pll_value, SDHCI_GLI_9750_PLL);
238	sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
239
240	/* disable tuned clk */
241	ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
242	ctrl2 &= ~SDHCI_CTRL_TUNED_CLK;
243	sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
244
245	/* enable tuning parameters control */
246	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_EN;
247	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_EN,
248				    GLI_9750_TUNING_CONTROL_EN_ON);
249	sdhci_writel(host, control_value, SDHCI_GLI_9750_TUNING_CONTROL);
250
251	/* write tuning parameters */
252	sdhci_writel(host, parameter_value, SDHCI_GLI_9750_TUNING_PARAMETERS);
253
254	/* disable tuning parameters control */
255	control_value &= ~SDHCI_GLI_9750_TUNING_CONTROL_EN;
256	control_value |= FIELD_PREP(SDHCI_GLI_9750_TUNING_CONTROL_EN,
257				    GLI_9750_TUNING_CONTROL_EN_OFF);
258	sdhci_writel(host, control_value, SDHCI_GLI_9750_TUNING_CONTROL);
259
260	/* clear tuned clk */
261	ctrl2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
262	ctrl2 &= ~SDHCI_CTRL_TUNED_CLK;
263	sdhci_writew(host, ctrl2, SDHCI_HOST_CONTROL2);
264
265	gl9750_wt_off(host);
266}
267
268static void gli_set_9750_rx_inv(struct sdhci_host *host, bool b)
269{
270	u32 misc_value;
271
272	gl9750_wt_on(host);
273
274	misc_value = sdhci_readl(host, SDHCI_GLI_9750_MISC);
275	misc_value &= ~SDHCI_GLI_9750_MISC_RX_INV;
276	if (b) {
277		misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_RX_INV,
278					 GLI_9750_MISC_RX_INV_ON);
279	} else {
280		misc_value |= FIELD_PREP(SDHCI_GLI_9750_MISC_RX_INV,
281					 GLI_9750_MISC_RX_INV_OFF);
282	}
283	sdhci_writel(host, misc_value, SDHCI_GLI_9750_MISC);
284
285	gl9750_wt_off(host);
286}
287
288static int __sdhci_execute_tuning_9750(struct sdhci_host *host, u32 opcode)
289{
290	int i;
291	int rx_inv;
292
293	for (rx_inv = 0; rx_inv < 2; rx_inv++) {
294		gli_set_9750_rx_inv(host, !!rx_inv);
295		sdhci_start_tuning(host);
296
297		for (i = 0; i < GLI_MAX_TUNING_LOOP; i++) {
298			u16 ctrl;
299
300			sdhci_send_tuning(host, opcode);
301
302			if (!host->tuning_done) {
303				sdhci_abort_tuning(host, opcode);
304				break;
305			}
306
307			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
308			if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) {
309				if (ctrl & SDHCI_CTRL_TUNED_CLK)
310					return 0; /* Success! */
311				break;
312			}
313		}
314	}
315	if (!host->tuning_done) {
316		pr_info("%s: Tuning timeout, falling back to fixed sampling clock\n",
317			mmc_hostname(host->mmc));
318		return -ETIMEDOUT;
319	}
320
321	pr_info("%s: Tuning failed, falling back to fixed sampling clock\n",
322		mmc_hostname(host->mmc));
323	sdhci_reset_tuning(host);
324
325	return -EAGAIN;
326}
327
328static int gl9750_execute_tuning(struct sdhci_host *host, u32 opcode)
329{
330	host->mmc->retune_period = 0;
331	if (host->tuning_mode == SDHCI_TUNING_MODE_1)
332		host->mmc->retune_period = host->tuning_count;
333
334	gli_set_9750(host);
335	host->tuning_err = __sdhci_execute_tuning_9750(host, opcode);
336	sdhci_end_tuning(host);
337
338	return 0;
339}
340
341static void gl9750_disable_ssc_pll(struct sdhci_host *host)
342{
343	u32 pll;
344
345	gl9750_wt_on(host);
346	pll = sdhci_readl(host, SDHCI_GLI_9750_PLL);
347	pll &= ~(SDHCI_GLI_9750_PLL_DIR | SDHCI_GLI_9750_PLLSSC_EN);
348	sdhci_writel(host, pll, SDHCI_GLI_9750_PLL);
349	gl9750_wt_off(host);
350}
351
352static void gl9750_set_pll(struct sdhci_host *host, u8 dir, u16 ldiv, u8 pdiv)
353{
354	u32 pll;
355
356	gl9750_wt_on(host);
357	pll = sdhci_readl(host, SDHCI_GLI_9750_PLL);
358	pll &= ~(SDHCI_GLI_9750_PLL_LDIV |
359		 SDHCI_GLI_9750_PLL_PDIV |
360		 SDHCI_GLI_9750_PLL_DIR);
361	pll |= FIELD_PREP(SDHCI_GLI_9750_PLL_LDIV, ldiv) |
362	       FIELD_PREP(SDHCI_GLI_9750_PLL_PDIV, pdiv) |
363	       FIELD_PREP(SDHCI_GLI_9750_PLL_DIR, dir);
364	sdhci_writel(host, pll, SDHCI_GLI_9750_PLL);
365	gl9750_wt_off(host);
366
367	/* wait for pll stable */
368	mdelay(1);
369}
370
371static void gl9750_set_ssc(struct sdhci_host *host, u8 enable, u8 step, u16 ppm)
372{
373	u32 pll;
374	u32 ssc;
375
376	gl9750_wt_on(host);
377	pll = sdhci_readl(host, SDHCI_GLI_9750_PLL);
378	ssc = sdhci_readl(host, SDHCI_GLI_9750_PLLSSC);
379	pll &= ~(SDHCI_GLI_9750_PLLSSC_STEP |
380		 SDHCI_GLI_9750_PLLSSC_EN);
381	ssc &= ~SDHCI_GLI_9750_PLLSSC_PPM;
382	pll |= FIELD_PREP(SDHCI_GLI_9750_PLLSSC_STEP, step) |
383	       FIELD_PREP(SDHCI_GLI_9750_PLLSSC_EN, enable);
384	ssc |= FIELD_PREP(SDHCI_GLI_9750_PLLSSC_PPM, ppm);
385	sdhci_writel(host, ssc, SDHCI_GLI_9750_PLLSSC);
386	sdhci_writel(host, pll, SDHCI_GLI_9750_PLL);
387	gl9750_wt_off(host);
388}
389
390static void gl9750_set_ssc_pll_205mhz(struct sdhci_host *host)
391{
392	/* set pll to 205MHz and enable ssc */
393	gl9750_set_ssc(host, 0x1, 0x1F, 0xFFE7);
394	gl9750_set_pll(host, 0x1, 0x246, 0x0);
395}
396
397static void sdhci_gl9750_set_clock(struct sdhci_host *host, unsigned int clock)
398{
399	struct mmc_ios *ios = &host->mmc->ios;
400	u16 clk;
401
402	host->mmc->actual_clock = 0;
403
404	gl9750_disable_ssc_pll(host);
405	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
406
407	if (clock == 0)
408		return;
409
410	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
411	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
412		host->mmc->actual_clock = 205000000;
413		gl9750_set_ssc_pll_205mhz(host);
414	}
415
416	sdhci_enable_clk(host, clk);
417}
418
419static void gl9750_hw_setting(struct sdhci_host *host)
420{
421	u32 value;
422
423	gl9750_wt_on(host);
424
425	value = sdhci_readl(host, SDHCI_GLI_9750_CFG2);
426	value &= ~SDHCI_GLI_9750_CFG2_L1DLY;
427	/* set ASPM L1 entry delay to 7.9us */
428	value |= FIELD_PREP(SDHCI_GLI_9750_CFG2_L1DLY,
429			    GLI_9750_CFG2_L1DLY_VALUE);
430	sdhci_writel(host, value, SDHCI_GLI_9750_CFG2);
431
432	gl9750_wt_off(host);
433}
434
435static void gli_pcie_enable_msi(struct sdhci_pci_slot *slot)
436{
437	int ret;
438
439	ret = pci_alloc_irq_vectors(slot->chip->pdev, 1, 1,
440				    PCI_IRQ_MSI | PCI_IRQ_MSIX);
441	if (ret < 0) {
442		pr_warn("%s: enable PCI MSI failed, error=%d\n",
443		       mmc_hostname(slot->host->mmc), ret);
444		return;
445	}
446
447	slot->host->irq = pci_irq_vector(slot->chip->pdev, 0);
448}
449
450static inline void gl9755_wt_on(struct pci_dev *pdev)
451{
452	u32 wt_value;
453	u32 wt_enable;
454
455	pci_read_config_dword(pdev, PCI_GLI_9755_WT, &wt_value);
456	wt_enable = FIELD_GET(PCI_GLI_9755_WT_EN, wt_value);
457
458	if (wt_enable == GLI_9755_WT_EN_ON)
459		return;
460
461	wt_value &= ~PCI_GLI_9755_WT_EN;
462	wt_value |= FIELD_PREP(PCI_GLI_9755_WT_EN, GLI_9755_WT_EN_ON);
463
464	pci_write_config_dword(pdev, PCI_GLI_9755_WT, wt_value);
465}
466
467static inline void gl9755_wt_off(struct pci_dev *pdev)
468{
469	u32 wt_value;
470	u32 wt_enable;
471
472	pci_read_config_dword(pdev, PCI_GLI_9755_WT, &wt_value);
473	wt_enable = FIELD_GET(PCI_GLI_9755_WT_EN, wt_value);
474
475	if (wt_enable == GLI_9755_WT_EN_OFF)
476		return;
477
478	wt_value &= ~PCI_GLI_9755_WT_EN;
479	wt_value |= FIELD_PREP(PCI_GLI_9755_WT_EN, GLI_9755_WT_EN_OFF);
480
481	pci_write_config_dword(pdev, PCI_GLI_9755_WT, wt_value);
482}
483
484static void gl9755_disable_ssc_pll(struct pci_dev *pdev)
485{
486	u32 pll;
487
488	gl9755_wt_on(pdev);
489	pci_read_config_dword(pdev, PCI_GLI_9755_PLL, &pll);
490	pll &= ~(PCI_GLI_9755_PLL_DIR | PCI_GLI_9755_PLLSSC_EN);
491	pci_write_config_dword(pdev, PCI_GLI_9755_PLL, pll);
492	gl9755_wt_off(pdev);
493}
494
495static void gl9755_set_pll(struct pci_dev *pdev, u8 dir, u16 ldiv, u8 pdiv)
496{
497	u32 pll;
498
499	gl9755_wt_on(pdev);
500	pci_read_config_dword(pdev, PCI_GLI_9755_PLL, &pll);
501	pll &= ~(PCI_GLI_9755_PLL_LDIV |
502		 PCI_GLI_9755_PLL_PDIV |
503		 PCI_GLI_9755_PLL_DIR);
504	pll |= FIELD_PREP(PCI_GLI_9755_PLL_LDIV, ldiv) |
505	       FIELD_PREP(PCI_GLI_9755_PLL_PDIV, pdiv) |
506	       FIELD_PREP(PCI_GLI_9755_PLL_DIR, dir);
507	pci_write_config_dword(pdev, PCI_GLI_9755_PLL, pll);
508	gl9755_wt_off(pdev);
509
510	/* wait for pll stable */
511	mdelay(1);
512}
513
514static void gl9755_set_ssc(struct pci_dev *pdev, u8 enable, u8 step, u16 ppm)
515{
516	u32 pll;
517	u32 ssc;
518
519	gl9755_wt_on(pdev);
520	pci_read_config_dword(pdev, PCI_GLI_9755_PLL, &pll);
521	pci_read_config_dword(pdev, PCI_GLI_9755_PLLSSC, &ssc);
522	pll &= ~(PCI_GLI_9755_PLLSSC_STEP |
523		 PCI_GLI_9755_PLLSSC_EN);
524	ssc &= ~PCI_GLI_9755_PLLSSC_PPM;
525	pll |= FIELD_PREP(PCI_GLI_9755_PLLSSC_STEP, step) |
526	       FIELD_PREP(PCI_GLI_9755_PLLSSC_EN, enable);
527	ssc |= FIELD_PREP(PCI_GLI_9755_PLLSSC_PPM, ppm);
528	pci_write_config_dword(pdev, PCI_GLI_9755_PLLSSC, ssc);
529	pci_write_config_dword(pdev, PCI_GLI_9755_PLL, pll);
530	gl9755_wt_off(pdev);
531}
532
533static void gl9755_set_ssc_pll_205mhz(struct pci_dev *pdev)
534{
535	/* set pll to 205MHz and enable ssc */
536	gl9755_set_ssc(pdev, 0x1, 0x1F, 0xFFE7);
537	gl9755_set_pll(pdev, 0x1, 0x246, 0x0);
538}
539
540static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
541{
542	struct sdhci_pci_slot *slot = sdhci_priv(host);
543	struct mmc_ios *ios = &host->mmc->ios;
544	struct pci_dev *pdev;
545	u16 clk;
546
547	pdev = slot->chip->pdev;
548	host->mmc->actual_clock = 0;
549
550	gl9755_disable_ssc_pll(pdev);
551	sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
552
553	if (clock == 0)
554		return;
555
556	clk = sdhci_calc_clk(host, clock, &host->mmc->actual_clock);
557	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
558		host->mmc->actual_clock = 205000000;
559		gl9755_set_ssc_pll_205mhz(pdev);
560	}
561
562	sdhci_enable_clk(host, clk);
563}
564
565static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
566{
567	struct pci_dev *pdev = slot->chip->pdev;
568	u32 value;
569
570	gl9755_wt_on(pdev);
571
572	pci_read_config_dword(pdev, PCI_GLI_9755_PECONF, &value);
573	value &= ~PCI_GLI_9755_LFCLK;
574	value &= ~PCI_GLI_9755_DMACLK;
575	pci_write_config_dword(pdev, PCI_GLI_9755_PECONF, value);
576
577	/* enable short circuit protection */
578	pci_read_config_dword(pdev, PCI_GLI_9755_SerDes, &value);
579	value &= ~PCI_GLI_9755_SCP_DIS;
580	pci_write_config_dword(pdev, PCI_GLI_9755_SerDes, value);
581
582	pci_read_config_dword(pdev, PCI_GLI_9755_CFG2, &value);
583	value &= ~PCI_GLI_9755_CFG2_L1DLY;
584	/* set ASPM L1 entry delay to 7.9us */
585	value |= FIELD_PREP(PCI_GLI_9755_CFG2_L1DLY,
586			    GLI_9755_CFG2_L1DLY_VALUE);
587	pci_write_config_dword(pdev, PCI_GLI_9755_CFG2, value);
588
589	gl9755_wt_off(pdev);
590}
591
592static int gli_probe_slot_gl9750(struct sdhci_pci_slot *slot)
593{
594	struct sdhci_host *host = slot->host;
595
596	gl9750_hw_setting(host);
597	gli_pcie_enable_msi(slot);
598	slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
599	sdhci_enable_v4_mode(host);
600
601	return 0;
602}
603
604static int gli_probe_slot_gl9755(struct sdhci_pci_slot *slot)
605{
606	struct sdhci_host *host = slot->host;
607
608	gl9755_hw_setting(slot);
609	gli_pcie_enable_msi(slot);
610	slot->host->mmc->caps2 |= MMC_CAP2_NO_SDIO;
611	sdhci_enable_v4_mode(host);
612
613	return 0;
614}
615
616static void sdhci_gli_voltage_switch(struct sdhci_host *host)
617{
618	/*
619	 * According to Section 3.6.1 signal voltage switch procedure in
620	 * SD Host Controller Simplified Spec. 4.20, steps 6~8 are as
621	 * follows:
622	 * (6) Set 1.8V Signal Enable in the Host Control 2 register.
623	 * (7) Wait 5ms. 1.8V voltage regulator shall be stable within this
624	 *     period.
625	 * (8) If 1.8V Signal Enable is cleared by Host Controller, go to
626	 *     step (12).
627	 *
628	 * Wait 5ms after set 1.8V signal enable in Host Control 2 register
629	 * to ensure 1.8V signal enable bit is set by GL9750/GL9755.
630	 *
631	 * ...however, the controller in the NUC10i3FNK4 (a 9755) requires
632	 * slightly longer than 5ms before the control register reports that
633	 * 1.8V is ready, and far longer still before the card will actually
634	 * work reliably.
635	 */
636	usleep_range(100000, 110000);
637}
638
639static void sdhci_gl9750_reset(struct sdhci_host *host, u8 mask)
640{
641	sdhci_reset(host, mask);
642	gli_set_9750(host);
643}
644
645static u32 sdhci_gl9750_readl(struct sdhci_host *host, int reg)
646{
647	u32 value;
648
649	value = readl(host->ioaddr + reg);
650	if (unlikely(reg == SDHCI_MAX_CURRENT && !(value & 0xff)))
651		value |= 0xc8;
652
653	return value;
654}
655
656#ifdef CONFIG_PM_SLEEP
657static int sdhci_pci_gli_resume(struct sdhci_pci_chip *chip)
658{
659	struct sdhci_pci_slot *slot = chip->slots[0];
660
661	pci_free_irq_vectors(slot->chip->pdev);
662	gli_pcie_enable_msi(slot);
663
664	return sdhci_pci_resume_host(chip);
665}
666
667static int sdhci_cqhci_gli_resume(struct sdhci_pci_chip *chip)
668{
669	struct sdhci_pci_slot *slot = chip->slots[0];
670	int ret;
671
672	ret = sdhci_pci_gli_resume(chip);
673	if (ret)
674		return ret;
675
676	return cqhci_resume(slot->host->mmc);
677}
678
679static int sdhci_cqhci_gli_suspend(struct sdhci_pci_chip *chip)
680{
681	struct sdhci_pci_slot *slot = chip->slots[0];
682	int ret;
683
684	ret = cqhci_suspend(slot->host->mmc);
685	if (ret)
686		return ret;
687
688	return sdhci_suspend_host(slot->host);
689}
690#endif
691
692static void gl9763e_hs400_enhanced_strobe(struct mmc_host *mmc,
693					  struct mmc_ios *ios)
694{
695	struct sdhci_host *host = mmc_priv(mmc);
696	u32 val;
697
698	val = sdhci_readl(host, SDHCI_GLI_9763E_HS400_ES_REG);
699	if (ios->enhanced_strobe)
700		val |= SDHCI_GLI_9763E_HS400_ES_BIT;
701	else
702		val &= ~SDHCI_GLI_9763E_HS400_ES_BIT;
703
704	sdhci_writel(host, val, SDHCI_GLI_9763E_HS400_ES_REG);
705}
706
707static void sdhci_set_gl9763e_signaling(struct sdhci_host *host,
708					unsigned int timing)
709{
710	u16 ctrl_2;
711
712	ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
713	ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
714	if (timing == MMC_TIMING_MMC_HS200)
715		ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
716	else if (timing == MMC_TIMING_MMC_HS)
717		ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
718	else if (timing == MMC_TIMING_MMC_DDR52)
719		ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
720	else if (timing == MMC_TIMING_MMC_HS400)
721		ctrl_2 |= SDHCI_GLI_9763E_CTRL_HS400;
722
723	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
724}
725
726static void sdhci_gl9763e_dumpregs(struct mmc_host *mmc)
727{
728	sdhci_dumpregs(mmc_priv(mmc));
729}
730
731static void sdhci_gl9763e_cqe_pre_enable(struct mmc_host *mmc)
732{
733	struct cqhci_host *cq_host = mmc->cqe_private;
734	u32 value;
735
736	value = cqhci_readl(cq_host, CQHCI_CFG);
737	value |= CQHCI_ENABLE;
738	cqhci_writel(cq_host, value, CQHCI_CFG);
739}
740
741static void sdhci_gl9763e_cqe_enable(struct mmc_host *mmc)
742{
743	struct sdhci_host *host = mmc_priv(mmc);
744
745	sdhci_writew(host, GLI_9763E_CQE_TRNS_MODE, SDHCI_TRANSFER_MODE);
746	sdhci_cqe_enable(mmc);
747}
748
749static u32 sdhci_gl9763e_cqhci_irq(struct sdhci_host *host, u32 intmask)
750{
751	int cmd_error = 0;
752	int data_error = 0;
753
754	if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
755		return intmask;
756
757	cqhci_irq(host->mmc, intmask, cmd_error, data_error);
758
759	return 0;
760}
761
762static void sdhci_gl9763e_cqe_post_disable(struct mmc_host *mmc)
763{
764	struct sdhci_host *host = mmc_priv(mmc);
765	struct cqhci_host *cq_host = mmc->cqe_private;
766	u32 value;
767
768	value = cqhci_readl(cq_host, CQHCI_CFG);
769	value &= ~CQHCI_ENABLE;
770	cqhci_writel(cq_host, value, CQHCI_CFG);
771	sdhci_writew(host, 0x0, SDHCI_TRANSFER_MODE);
772}
773
774static const struct cqhci_host_ops sdhci_gl9763e_cqhci_ops = {
775	.enable         = sdhci_gl9763e_cqe_enable,
776	.disable        = sdhci_cqe_disable,
777	.dumpregs       = sdhci_gl9763e_dumpregs,
778	.pre_enable     = sdhci_gl9763e_cqe_pre_enable,
779	.post_disable   = sdhci_gl9763e_cqe_post_disable,
780};
781
782static int gl9763e_add_host(struct sdhci_pci_slot *slot)
783{
784	struct device *dev = &slot->chip->pdev->dev;
785	struct sdhci_host *host = slot->host;
786	struct cqhci_host *cq_host;
787	bool dma64;
788	int ret;
789
790	ret = sdhci_setup_host(host);
791	if (ret)
792		return ret;
793
794	cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
795	if (!cq_host) {
796		ret = -ENOMEM;
797		goto cleanup;
798	}
799
800	cq_host->mmio = host->ioaddr + SDHCI_GLI_9763E_CQE_BASE_ADDR;
801	cq_host->ops = &sdhci_gl9763e_cqhci_ops;
802
803	dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
804	if (dma64)
805		cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
806
807	ret = cqhci_init(cq_host, host->mmc, dma64);
808	if (ret)
809		goto cleanup;
810
811	ret = __sdhci_add_host(host);
812	if (ret)
813		goto cleanup;
814
815	return 0;
816
817cleanup:
818	sdhci_cleanup_host(host);
819	return ret;
820}
821
822static void sdhci_gl9763e_reset(struct sdhci_host *host, u8 mask)
823{
824	if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL) &&
825	    host->mmc->cqe_private)
826		cqhci_deactivate(host->mmc);
827	sdhci_reset(host, mask);
828}
829
830static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
831{
832	struct pci_dev *pdev = slot->chip->pdev;
833	u32 value;
834
835	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
836	value &= ~GLI_9763E_VHS_REV;
837	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_W);
838	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
839
840	pci_read_config_dword(pdev, PCIE_GLI_9763E_SCR, &value);
841	value |= GLI_9763E_SCR_AXI_REQ;
842	pci_write_config_dword(pdev, PCIE_GLI_9763E_SCR, value);
843
844	pci_read_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, &value);
845	value &= ~GLI_9763E_HS400_SLOW;
846	pci_write_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, value);
847
848	pci_read_config_dword(pdev, PCIE_GLI_9763E_CFG2, &value);
849	value &= ~GLI_9763E_CFG2_L1DLY;
850	/* set ASPM L1 entry delay to 21us */
851	value |= FIELD_PREP(GLI_9763E_CFG2_L1DLY, GLI_9763E_CFG2_L1DLY_MID);
852	pci_write_config_dword(pdev, PCIE_GLI_9763E_CFG2, value);
853
854	pci_read_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, &value);
855	value &= ~GLI_9763E_HS400_RXDLY;
856	value |= FIELD_PREP(GLI_9763E_HS400_RXDLY, GLI_9763E_HS400_RXDLY_5);
857	pci_write_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, value);
858
859	pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value);
860	value &= ~GLI_9763E_VHS_REV;
861	value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R);
862	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
863}
864
865static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot)
866{
867	struct pci_dev *pdev = slot->chip->pdev;
868	struct sdhci_host *host = slot->host;
869	u32 value;
870
871	host->mmc->caps |= MMC_CAP_8_BIT_DATA |
872			   MMC_CAP_1_8V_DDR |
873			   MMC_CAP_NONREMOVABLE;
874	host->mmc->caps2 |= MMC_CAP2_HS200_1_8V_SDR |
875			    MMC_CAP2_HS400_1_8V |
876			    MMC_CAP2_HS400_ES |
877			    MMC_CAP2_NO_SDIO |
878			    MMC_CAP2_NO_SD;
879
880	pci_read_config_dword(pdev, PCIE_GLI_9763E_MB, &value);
881	if (!(value & GLI_9763E_MB_CMDQ_OFF))
882		if (value & GLI_9763E_MB_ERP_ON)
883			host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
884
885	gli_pcie_enable_msi(slot);
886	host->mmc_host_ops.hs400_enhanced_strobe =
887					gl9763e_hs400_enhanced_strobe;
888	gli_set_gl9763e(slot);
889	sdhci_enable_v4_mode(host);
890
891	return 0;
892}
893
894static const struct sdhci_ops sdhci_gl9755_ops = {
895	.set_clock		= sdhci_gl9755_set_clock,
896	.enable_dma		= sdhci_pci_enable_dma,
897	.set_bus_width		= sdhci_set_bus_width,
898	.reset			= sdhci_reset,
899	.set_uhs_signaling	= sdhci_set_uhs_signaling,
900	.voltage_switch		= sdhci_gli_voltage_switch,
901};
902
903const struct sdhci_pci_fixes sdhci_gl9755 = {
904	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
905	.quirks2	= SDHCI_QUIRK2_BROKEN_DDR50,
906	.probe_slot	= gli_probe_slot_gl9755,
907	.ops            = &sdhci_gl9755_ops,
908#ifdef CONFIG_PM_SLEEP
909	.resume         = sdhci_pci_gli_resume,
910#endif
911};
912
913static const struct sdhci_ops sdhci_gl9750_ops = {
914	.read_l                 = sdhci_gl9750_readl,
915	.set_clock		= sdhci_gl9750_set_clock,
916	.enable_dma		= sdhci_pci_enable_dma,
917	.set_bus_width		= sdhci_set_bus_width,
918	.reset			= sdhci_gl9750_reset,
919	.set_uhs_signaling	= sdhci_set_uhs_signaling,
920	.voltage_switch		= sdhci_gli_voltage_switch,
921	.platform_execute_tuning = gl9750_execute_tuning,
922};
923
924const struct sdhci_pci_fixes sdhci_gl9750 = {
925	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
926	.quirks2	= SDHCI_QUIRK2_BROKEN_DDR50,
927	.probe_slot	= gli_probe_slot_gl9750,
928	.ops            = &sdhci_gl9750_ops,
929#ifdef CONFIG_PM_SLEEP
930	.resume         = sdhci_pci_gli_resume,
931#endif
932};
933
934static const struct sdhci_ops sdhci_gl9763e_ops = {
935	.set_clock		= sdhci_set_clock,
936	.enable_dma		= sdhci_pci_enable_dma,
937	.set_bus_width		= sdhci_set_bus_width,
938	.reset			= sdhci_gl9763e_reset,
939	.set_uhs_signaling	= sdhci_set_gl9763e_signaling,
940	.voltage_switch		= sdhci_gli_voltage_switch,
941	.irq                    = sdhci_gl9763e_cqhci_irq,
942};
943
944const struct sdhci_pci_fixes sdhci_gl9763e = {
945	.quirks		= SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
946	.probe_slot	= gli_probe_slot_gl9763e,
947	.ops            = &sdhci_gl9763e_ops,
948#ifdef CONFIG_PM_SLEEP
949	.resume		= sdhci_cqhci_gli_resume,
950	.suspend	= sdhci_cqhci_gli_suspend,
951#endif
952	.add_host       = gl9763e_add_host,
953};