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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[deliverable/linux.git] / drivers / mmc / host / sdhci-esdhc-imx.c
1 /*
2 * Freescale eSDHC i.MX controller driver for the platform bus.
3 *
4 * derived from the OF-version.
5 *
6 * Copyright (c) 2010 Pengutronix e.K.
7 * Author: Wolfram Sang <kernel@pengutronix.de>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License.
12 */
13
14 #include <linux/io.h>
15 #include <linux/delay.h>
16 #include <linux/err.h>
17 #include <linux/clk.h>
18 #include <linux/gpio.h>
19 #include <linux/module.h>
20 #include <linux/slab.h>
21 #include <linux/mmc/host.h>
22 #include <linux/mmc/mmc.h>
23 #include <linux/mmc/sdio.h>
24 #include <linux/mmc/slot-gpio.h>
25 #include <linux/of.h>
26 #include <linux/of_device.h>
27 #include <linux/of_gpio.h>
28 #include <linux/pinctrl/consumer.h>
29 #include <linux/platform_data/mmc-esdhc-imx.h>
30 #include <linux/pm_runtime.h>
31 #include "sdhci-pltfm.h"
32 #include "sdhci-esdhc.h"
33
34 #define ESDHC_CTRL_D3CD 0x08
35 #define ESDHC_BURST_LEN_EN_INCR (1 << 27)
36 /* VENDOR SPEC register */
37 #define ESDHC_VENDOR_SPEC 0xc0
38 #define ESDHC_VENDOR_SPEC_SDIO_QUIRK (1 << 1)
39 #define ESDHC_VENDOR_SPEC_VSELECT (1 << 1)
40 #define ESDHC_VENDOR_SPEC_FRC_SDCLK_ON (1 << 8)
41 #define ESDHC_WTMK_LVL 0x44
42 #define ESDHC_MIX_CTRL 0x48
43 #define ESDHC_MIX_CTRL_DDREN (1 << 3)
44 #define ESDHC_MIX_CTRL_AC23EN (1 << 7)
45 #define ESDHC_MIX_CTRL_EXE_TUNE (1 << 22)
46 #define ESDHC_MIX_CTRL_SMPCLK_SEL (1 << 23)
47 #define ESDHC_MIX_CTRL_FBCLK_SEL (1 << 25)
48 #define ESDHC_MIX_CTRL_HS400_EN (1 << 26)
49 /* Bits 3 and 6 are not SDHCI standard definitions */
50 #define ESDHC_MIX_CTRL_SDHCI_MASK 0xb7
51 /* Tuning bits */
52 #define ESDHC_MIX_CTRL_TUNING_MASK 0x03c00000
53
54 /* dll control register */
55 #define ESDHC_DLL_CTRL 0x60
56 #define ESDHC_DLL_OVERRIDE_VAL_SHIFT 9
57 #define ESDHC_DLL_OVERRIDE_EN_SHIFT 8
58
59 /* tune control register */
60 #define ESDHC_TUNE_CTRL_STATUS 0x68
61 #define ESDHC_TUNE_CTRL_STEP 1
62 #define ESDHC_TUNE_CTRL_MIN 0
63 #define ESDHC_TUNE_CTRL_MAX ((1 << 7) - 1)
64
65 /* strobe dll register */
66 #define ESDHC_STROBE_DLL_CTRL 0x70
67 #define ESDHC_STROBE_DLL_CTRL_ENABLE (1 << 0)
68 #define ESDHC_STROBE_DLL_CTRL_RESET (1 << 1)
69 #define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT 3
70
71 #define ESDHC_STROBE_DLL_STATUS 0x74
72 #define ESDHC_STROBE_DLL_STS_REF_LOCK (1 << 1)
73 #define ESDHC_STROBE_DLL_STS_SLV_LOCK 0x1
74
75 #define ESDHC_TUNING_CTRL 0xcc
76 #define ESDHC_STD_TUNING_EN (1 << 24)
77 /* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
78 #define ESDHC_TUNING_START_TAP 0x1
79 #define ESDHC_TUNING_STEP_MASK 0x00070000
80 #define ESDHC_TUNING_STEP_SHIFT 16
81
82 /* pinctrl state */
83 #define ESDHC_PINCTRL_STATE_100MHZ "state_100mhz"
84 #define ESDHC_PINCTRL_STATE_200MHZ "state_200mhz"
85
86 /*
87 * Our interpretation of the SDHCI_HOST_CONTROL register
88 */
89 #define ESDHC_CTRL_4BITBUS (0x1 << 1)
90 #define ESDHC_CTRL_8BITBUS (0x2 << 1)
91 #define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1)
92
93 /*
94 * There is an INT DMA ERR mis-match between eSDHC and STD SDHC SPEC:
95 * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design,
96 * but bit28 is used as the INT DMA ERR in fsl eSDHC design.
97 * Define this macro DMA error INT for fsl eSDHC
98 */
99 #define ESDHC_INT_VENDOR_SPEC_DMA_ERR (1 << 28)
100
101 /*
102 * The CMDTYPE of the CMD register (offset 0xE) should be set to
103 * "11" when the STOP CMD12 is issued on imx53 to abort one
104 * open ended multi-blk IO. Otherwise the TC INT wouldn't
105 * be generated.
106 * In exact block transfer, the controller doesn't complete the
107 * operations automatically as required at the end of the
108 * transfer and remains on hold if the abort command is not sent.
109 * As a result, the TC flag is not asserted and SW received timeout
110 * exeception. Bit1 of Vendor Spec registor is used to fix it.
111 */
112 #define ESDHC_FLAG_MULTIBLK_NO_INT BIT(1)
113 /*
114 * The flag enables the workaround for ESDHC errata ENGcm07207 which
115 * affects i.MX25 and i.MX35.
116 */
117 #define ESDHC_FLAG_ENGCM07207 BIT(2)
118 /*
119 * The flag tells that the ESDHC controller is an USDHC block that is
120 * integrated on the i.MX6 series.
121 */
122 #define ESDHC_FLAG_USDHC BIT(3)
123 /* The IP supports manual tuning process */
124 #define ESDHC_FLAG_MAN_TUNING BIT(4)
125 /* The IP supports standard tuning process */
126 #define ESDHC_FLAG_STD_TUNING BIT(5)
127 /* The IP has SDHCI_CAPABILITIES_1 register */
128 #define ESDHC_FLAG_HAVE_CAP1 BIT(6)
129 /*
130 * The IP has errata ERR004536
131 * uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow,
132 * when reading data from the card
133 */
134 #define ESDHC_FLAG_ERR004536 BIT(7)
135 /* The IP supports HS200 mode */
136 #define ESDHC_FLAG_HS200 BIT(8)
137 /* The IP supports HS400 mode */
138 #define ESDHC_FLAG_HS400 BIT(9)
139
140 /* A higher clock ferquency than this rate requires strobell dll control */
141 #define ESDHC_STROBE_DLL_CLK_FREQ 100000000
142
143 struct esdhc_soc_data {
144 u32 flags;
145 };
146
147 static struct esdhc_soc_data esdhc_imx25_data = {
148 .flags = ESDHC_FLAG_ENGCM07207,
149 };
150
151 static struct esdhc_soc_data esdhc_imx35_data = {
152 .flags = ESDHC_FLAG_ENGCM07207,
153 };
154
155 static struct esdhc_soc_data esdhc_imx51_data = {
156 .flags = 0,
157 };
158
159 static struct esdhc_soc_data esdhc_imx53_data = {
160 .flags = ESDHC_FLAG_MULTIBLK_NO_INT,
161 };
162
163 static struct esdhc_soc_data usdhc_imx6q_data = {
164 .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING,
165 };
166
167 static struct esdhc_soc_data usdhc_imx6sl_data = {
168 .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
169 | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536
170 | ESDHC_FLAG_HS200,
171 };
172
173 static struct esdhc_soc_data usdhc_imx6sx_data = {
174 .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
175 | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200,
176 };
177
178 static struct esdhc_soc_data usdhc_imx7d_data = {
179 .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
180 | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
181 | ESDHC_FLAG_HS400,
182 };
183
184 struct pltfm_imx_data {
185 u32 scratchpad;
186 struct pinctrl *pinctrl;
187 struct pinctrl_state *pins_default;
188 struct pinctrl_state *pins_100mhz;
189 struct pinctrl_state *pins_200mhz;
190 const struct esdhc_soc_data *socdata;
191 struct esdhc_platform_data boarddata;
192 struct clk *clk_ipg;
193 struct clk *clk_ahb;
194 struct clk *clk_per;
195 enum {
196 NO_CMD_PENDING, /* no multiblock command pending*/
197 MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */
198 WAIT_FOR_INT, /* sent CMD12, waiting for response INT */
199 } multiblock_status;
200 u32 is_ddr;
201 };
202
203 static const struct platform_device_id imx_esdhc_devtype[] = {
204 {
205 .name = "sdhci-esdhc-imx25",
206 .driver_data = (kernel_ulong_t) &esdhc_imx25_data,
207 }, {
208 .name = "sdhci-esdhc-imx35",
209 .driver_data = (kernel_ulong_t) &esdhc_imx35_data,
210 }, {
211 .name = "sdhci-esdhc-imx51",
212 .driver_data = (kernel_ulong_t) &esdhc_imx51_data,
213 }, {
214 /* sentinel */
215 }
216 };
217 MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype);
218
219 static const struct of_device_id imx_esdhc_dt_ids[] = {
220 { .compatible = "fsl,imx25-esdhc", .data = &esdhc_imx25_data, },
221 { .compatible = "fsl,imx35-esdhc", .data = &esdhc_imx35_data, },
222 { .compatible = "fsl,imx51-esdhc", .data = &esdhc_imx51_data, },
223 { .compatible = "fsl,imx53-esdhc", .data = &esdhc_imx53_data, },
224 { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, },
225 { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, },
226 { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
227 { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, },
228 { /* sentinel */ }
229 };
230 MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
231
232 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
233 {
234 return data->socdata == &esdhc_imx25_data;
235 }
236
237 static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
238 {
239 return data->socdata == &esdhc_imx53_data;
240 }
241
242 static inline int is_imx6q_usdhc(struct pltfm_imx_data *data)
243 {
244 return data->socdata == &usdhc_imx6q_data;
245 }
246
247 static inline int esdhc_is_usdhc(struct pltfm_imx_data *data)
248 {
249 return !!(data->socdata->flags & ESDHC_FLAG_USDHC);
250 }
251
252 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
253 {
254 void __iomem *base = host->ioaddr + (reg & ~0x3);
255 u32 shift = (reg & 0x3) * 8;
256
257 writel(((readl(base) & ~(mask << shift)) | (val << shift)), base);
258 }
259
260 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
261 {
262 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
263 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
264 u32 val = readl(host->ioaddr + reg);
265
266 if (unlikely(reg == SDHCI_PRESENT_STATE)) {
267 u32 fsl_prss = val;
268 /* save the least 20 bits */
269 val = fsl_prss & 0x000FFFFF;
270 /* move dat[0-3] bits */
271 val |= (fsl_prss & 0x0F000000) >> 4;
272 /* move cmd line bit */
273 val |= (fsl_prss & 0x00800000) << 1;
274 }
275
276 if (unlikely(reg == SDHCI_CAPABILITIES)) {
277 /* ignore bit[0-15] as it stores cap_1 register val for mx6sl */
278 if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
279 val &= 0xffff0000;
280
281 /* In FSL esdhc IC module, only bit20 is used to indicate the
282 * ADMA2 capability of esdhc, but this bit is messed up on
283 * some SOCs (e.g. on MX25, MX35 this bit is set, but they
284 * don't actually support ADMA2). So set the BROKEN_ADMA
285 * uirk on MX25/35 platforms.
286 */
287
288 if (val & SDHCI_CAN_DO_ADMA1) {
289 val &= ~SDHCI_CAN_DO_ADMA1;
290 val |= SDHCI_CAN_DO_ADMA2;
291 }
292 }
293
294 if (unlikely(reg == SDHCI_CAPABILITIES_1)) {
295 if (esdhc_is_usdhc(imx_data)) {
296 if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
297 val = readl(host->ioaddr + SDHCI_CAPABILITIES) & 0xFFFF;
298 else
299 /* imx6q/dl does not have cap_1 register, fake one */
300 val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104
301 | SDHCI_SUPPORT_SDR50
302 | SDHCI_USE_SDR50_TUNING;
303
304 if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
305 val |= SDHCI_SUPPORT_HS400;
306 }
307 }
308
309 if (unlikely(reg == SDHCI_MAX_CURRENT) && esdhc_is_usdhc(imx_data)) {
310 val = 0;
311 val |= 0xFF << SDHCI_MAX_CURRENT_330_SHIFT;
312 val |= 0xFF << SDHCI_MAX_CURRENT_300_SHIFT;
313 val |= 0xFF << SDHCI_MAX_CURRENT_180_SHIFT;
314 }
315
316 if (unlikely(reg == SDHCI_INT_STATUS)) {
317 if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) {
318 val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR;
319 val |= SDHCI_INT_ADMA_ERROR;
320 }
321
322 /*
323 * mask off the interrupt we get in response to the manually
324 * sent CMD12
325 */
326 if ((imx_data->multiblock_status == WAIT_FOR_INT) &&
327 ((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) {
328 val &= ~SDHCI_INT_RESPONSE;
329 writel(SDHCI_INT_RESPONSE, host->ioaddr +
330 SDHCI_INT_STATUS);
331 imx_data->multiblock_status = NO_CMD_PENDING;
332 }
333 }
334
335 return val;
336 }
337
338 static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
339 {
340 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
341 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
342 u32 data;
343
344 if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)) {
345 if ((val & SDHCI_INT_CARD_INT) && !esdhc_is_usdhc(imx_data)) {
346 /*
347 * Clear and then set D3CD bit to avoid missing the
348 * card interrupt. This is a eSDHC controller problem
349 * so we need to apply the following workaround: clear
350 * and set D3CD bit will make eSDHC re-sample the card
351 * interrupt. In case a card interrupt was lost,
352 * re-sample it by the following steps.
353 */
354 data = readl(host->ioaddr + SDHCI_HOST_CONTROL);
355 data &= ~ESDHC_CTRL_D3CD;
356 writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
357 data |= ESDHC_CTRL_D3CD;
358 writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
359 }
360
361 if (val & SDHCI_INT_ADMA_ERROR) {
362 val &= ~SDHCI_INT_ADMA_ERROR;
363 val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR;
364 }
365 }
366
367 if (unlikely((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
368 && (reg == SDHCI_INT_STATUS)
369 && (val & SDHCI_INT_DATA_END))) {
370 u32 v;
371 v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
372 v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK;
373 writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
374
375 if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS)
376 {
377 /* send a manual CMD12 with RESPTYP=none */
378 data = MMC_STOP_TRANSMISSION << 24 |
379 SDHCI_CMD_ABORTCMD << 16;
380 writel(data, host->ioaddr + SDHCI_TRANSFER_MODE);
381 imx_data->multiblock_status = WAIT_FOR_INT;
382 }
383 }
384
385 writel(val, host->ioaddr + reg);
386 }
387
388 static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
389 {
390 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
391 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
392 u16 ret = 0;
393 u32 val;
394
395 if (unlikely(reg == SDHCI_HOST_VERSION)) {
396 reg ^= 2;
397 if (esdhc_is_usdhc(imx_data)) {
398 /*
399 * The usdhc register returns a wrong host version.
400 * Correct it here.
401 */
402 return SDHCI_SPEC_300;
403 }
404 }
405
406 if (unlikely(reg == SDHCI_HOST_CONTROL2)) {
407 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
408 if (val & ESDHC_VENDOR_SPEC_VSELECT)
409 ret |= SDHCI_CTRL_VDD_180;
410
411 if (esdhc_is_usdhc(imx_data)) {
412 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
413 val = readl(host->ioaddr + ESDHC_MIX_CTRL);
414 else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
415 /* the std tuning bits is in ACMD12_ERR for imx6sl */
416 val = readl(host->ioaddr + SDHCI_ACMD12_ERR);
417 }
418
419 if (val & ESDHC_MIX_CTRL_EXE_TUNE)
420 ret |= SDHCI_CTRL_EXEC_TUNING;
421 if (val & ESDHC_MIX_CTRL_SMPCLK_SEL)
422 ret |= SDHCI_CTRL_TUNED_CLK;
423
424 ret &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
425
426 return ret;
427 }
428
429 if (unlikely(reg == SDHCI_TRANSFER_MODE)) {
430 if (esdhc_is_usdhc(imx_data)) {
431 u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
432 ret = m & ESDHC_MIX_CTRL_SDHCI_MASK;
433 /* Swap AC23 bit */
434 if (m & ESDHC_MIX_CTRL_AC23EN) {
435 ret &= ~ESDHC_MIX_CTRL_AC23EN;
436 ret |= SDHCI_TRNS_AUTO_CMD23;
437 }
438 } else {
439 ret = readw(host->ioaddr + SDHCI_TRANSFER_MODE);
440 }
441
442 return ret;
443 }
444
445 return readw(host->ioaddr + reg);
446 }
447
448 static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
449 {
450 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
451 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
452 u32 new_val = 0;
453
454 switch (reg) {
455 case SDHCI_CLOCK_CONTROL:
456 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
457 if (val & SDHCI_CLOCK_CARD_EN)
458 new_val |= ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
459 else
460 new_val &= ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
461 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
462 return;
463 case SDHCI_HOST_CONTROL2:
464 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
465 if (val & SDHCI_CTRL_VDD_180)
466 new_val |= ESDHC_VENDOR_SPEC_VSELECT;
467 else
468 new_val &= ~ESDHC_VENDOR_SPEC_VSELECT;
469 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
470 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
471 new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
472 if (val & SDHCI_CTRL_TUNED_CLK)
473 new_val |= ESDHC_MIX_CTRL_SMPCLK_SEL;
474 else
475 new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
476 writel(new_val , host->ioaddr + ESDHC_MIX_CTRL);
477 } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
478 u32 v = readl(host->ioaddr + SDHCI_ACMD12_ERR);
479 u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
480 u32 tuning_ctrl;
481 if (val & SDHCI_CTRL_TUNED_CLK) {
482 v |= ESDHC_MIX_CTRL_SMPCLK_SEL;
483 } else {
484 v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
485 m &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
486 }
487
488 if (val & SDHCI_CTRL_EXEC_TUNING) {
489 v |= ESDHC_MIX_CTRL_EXE_TUNE;
490 m |= ESDHC_MIX_CTRL_FBCLK_SEL;
491 tuning_ctrl = readl(host->ioaddr + ESDHC_TUNING_CTRL);
492 tuning_ctrl |= ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP;
493 if (imx_data->boarddata.tuning_step) {
494 tuning_ctrl &= ~ESDHC_TUNING_STEP_MASK;
495 tuning_ctrl |= imx_data->boarddata.tuning_step << ESDHC_TUNING_STEP_SHIFT;
496 }
497 writel(tuning_ctrl, host->ioaddr + ESDHC_TUNING_CTRL);
498 } else {
499 v &= ~ESDHC_MIX_CTRL_EXE_TUNE;
500 }
501
502 writel(v, host->ioaddr + SDHCI_ACMD12_ERR);
503 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
504 }
505 return;
506 case SDHCI_TRANSFER_MODE:
507 if ((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
508 && (host->cmd->opcode == SD_IO_RW_EXTENDED)
509 && (host->cmd->data->blocks > 1)
510 && (host->cmd->data->flags & MMC_DATA_READ)) {
511 u32 v;
512 v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
513 v |= ESDHC_VENDOR_SPEC_SDIO_QUIRK;
514 writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
515 }
516
517 if (esdhc_is_usdhc(imx_data)) {
518 u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
519 /* Swap AC23 bit */
520 if (val & SDHCI_TRNS_AUTO_CMD23) {
521 val &= ~SDHCI_TRNS_AUTO_CMD23;
522 val |= ESDHC_MIX_CTRL_AC23EN;
523 }
524 m = val | (m & ~ESDHC_MIX_CTRL_SDHCI_MASK);
525 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
526 } else {
527 /*
528 * Postpone this write, we must do it together with a
529 * command write that is down below.
530 */
531 imx_data->scratchpad = val;
532 }
533 return;
534 case SDHCI_COMMAND:
535 if (host->cmd->opcode == MMC_STOP_TRANSMISSION)
536 val |= SDHCI_CMD_ABORTCMD;
537
538 if ((host->cmd->opcode == MMC_SET_BLOCK_COUNT) &&
539 (imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
540 imx_data->multiblock_status = MULTIBLK_IN_PROCESS;
541
542 if (esdhc_is_usdhc(imx_data))
543 writel(val << 16,
544 host->ioaddr + SDHCI_TRANSFER_MODE);
545 else
546 writel(val << 16 | imx_data->scratchpad,
547 host->ioaddr + SDHCI_TRANSFER_MODE);
548 return;
549 case SDHCI_BLOCK_SIZE:
550 val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
551 break;
552 }
553 esdhc_clrset_le(host, 0xffff, val, reg);
554 }
555
556 static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg)
557 {
558 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
559 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
560 u32 new_val;
561 u32 mask;
562
563 switch (reg) {
564 case SDHCI_POWER_CONTROL:
565 /*
566 * FSL put some DMA bits here
567 * If your board has a regulator, code should be here
568 */
569 return;
570 case SDHCI_HOST_CONTROL:
571 /* FSL messed up here, so we need to manually compose it. */
572 new_val = val & SDHCI_CTRL_LED;
573 /* ensure the endianness */
574 new_val |= ESDHC_HOST_CONTROL_LE;
575 /* bits 8&9 are reserved on mx25 */
576 if (!is_imx25_esdhc(imx_data)) {
577 /* DMA mode bits are shifted */
578 new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
579 }
580
581 /*
582 * Do not touch buswidth bits here. This is done in
583 * esdhc_pltfm_bus_width.
584 * Do not touch the D3CD bit either which is used for the
585 * SDIO interrupt errata workaround.
586 */
587 mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD);
588
589 esdhc_clrset_le(host, mask, new_val, reg);
590 return;
591 }
592 esdhc_clrset_le(host, 0xff, val, reg);
593
594 /*
595 * The esdhc has a design violation to SDHC spec which tells
596 * that software reset should not affect card detection circuit.
597 * But esdhc clears its SYSCTL register bits [0..2] during the
598 * software reset. This will stop those clocks that card detection
599 * circuit relies on. To work around it, we turn the clocks on back
600 * to keep card detection circuit functional.
601 */
602 if ((reg == SDHCI_SOFTWARE_RESET) && (val & 1)) {
603 esdhc_clrset_le(host, 0x7, 0x7, ESDHC_SYSTEM_CONTROL);
604 /*
605 * The reset on usdhc fails to clear MIX_CTRL register.
606 * Do it manually here.
607 */
608 if (esdhc_is_usdhc(imx_data)) {
609 /* the tuning bits should be kept during reset */
610 new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
611 writel(new_val & ESDHC_MIX_CTRL_TUNING_MASK,
612 host->ioaddr + ESDHC_MIX_CTRL);
613 imx_data->is_ddr = 0;
614 }
615 }
616 }
617
618 static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host)
619 {
620 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
621
622 return pltfm_host->clock;
623 }
624
625 static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
626 {
627 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
628
629 return pltfm_host->clock / 256 / 16;
630 }
631
632 static inline void esdhc_pltfm_set_clock(struct sdhci_host *host,
633 unsigned int clock)
634 {
635 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
636 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
637 unsigned int host_clock = pltfm_host->clock;
638 int pre_div = 2;
639 int div = 1;
640 u32 temp, val;
641
642 if (clock == 0) {
643 host->mmc->actual_clock = 0;
644
645 if (esdhc_is_usdhc(imx_data)) {
646 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
647 writel(val & ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
648 host->ioaddr + ESDHC_VENDOR_SPEC);
649 }
650 return;
651 }
652
653 if (esdhc_is_usdhc(imx_data) && !imx_data->is_ddr)
654 pre_div = 1;
655
656 temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
657 temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
658 | ESDHC_CLOCK_MASK);
659 sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
660
661 while (host_clock / pre_div / 16 > clock && pre_div < 256)
662 pre_div *= 2;
663
664 while (host_clock / pre_div / div > clock && div < 16)
665 div++;
666
667 host->mmc->actual_clock = host_clock / pre_div / div;
668 dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
669 clock, host->mmc->actual_clock);
670
671 if (imx_data->is_ddr)
672 pre_div >>= 2;
673 else
674 pre_div >>= 1;
675 div--;
676
677 temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
678 temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
679 | (div << ESDHC_DIVIDER_SHIFT)
680 | (pre_div << ESDHC_PREDIV_SHIFT));
681 sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
682
683 if (esdhc_is_usdhc(imx_data)) {
684 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
685 writel(val | ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
686 host->ioaddr + ESDHC_VENDOR_SPEC);
687 }
688
689 mdelay(1);
690 }
691
692 static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
693 {
694 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
695 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
696 struct esdhc_platform_data *boarddata = &imx_data->boarddata;
697
698 switch (boarddata->wp_type) {
699 case ESDHC_WP_GPIO:
700 return mmc_gpio_get_ro(host->mmc);
701 case ESDHC_WP_CONTROLLER:
702 return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
703 SDHCI_WRITE_PROTECT);
704 case ESDHC_WP_NONE:
705 break;
706 }
707
708 return -ENOSYS;
709 }
710
711 static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
712 {
713 u32 ctrl;
714
715 switch (width) {
716 case MMC_BUS_WIDTH_8:
717 ctrl = ESDHC_CTRL_8BITBUS;
718 break;
719 case MMC_BUS_WIDTH_4:
720 ctrl = ESDHC_CTRL_4BITBUS;
721 break;
722 default:
723 ctrl = 0;
724 break;
725 }
726
727 esdhc_clrset_le(host, ESDHC_CTRL_BUSWIDTH_MASK, ctrl,
728 SDHCI_HOST_CONTROL);
729 }
730
731 static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
732 {
733 u32 reg;
734
735 /* FIXME: delay a bit for card to be ready for next tuning due to errors */
736 mdelay(1);
737
738 reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
739 reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
740 ESDHC_MIX_CTRL_FBCLK_SEL;
741 writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
742 writel(val << 8, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
743 dev_dbg(mmc_dev(host->mmc),
744 "tunning with delay 0x%x ESDHC_TUNE_CTRL_STATUS 0x%x\n",
745 val, readl(host->ioaddr + ESDHC_TUNE_CTRL_STATUS));
746 }
747
748 static void esdhc_post_tuning(struct sdhci_host *host)
749 {
750 u32 reg;
751
752 reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
753 reg &= ~ESDHC_MIX_CTRL_EXE_TUNE;
754 writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
755 }
756
757 static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
758 {
759 int min, max, avg, ret;
760
761 /* find the mininum delay first which can pass tuning */
762 min = ESDHC_TUNE_CTRL_MIN;
763 while (min < ESDHC_TUNE_CTRL_MAX) {
764 esdhc_prepare_tuning(host, min);
765 if (!mmc_send_tuning(host->mmc, opcode, NULL))
766 break;
767 min += ESDHC_TUNE_CTRL_STEP;
768 }
769
770 /* find the maxinum delay which can not pass tuning */
771 max = min + ESDHC_TUNE_CTRL_STEP;
772 while (max < ESDHC_TUNE_CTRL_MAX) {
773 esdhc_prepare_tuning(host, max);
774 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
775 max -= ESDHC_TUNE_CTRL_STEP;
776 break;
777 }
778 max += ESDHC_TUNE_CTRL_STEP;
779 }
780
781 /* use average delay to get the best timing */
782 avg = (min + max) / 2;
783 esdhc_prepare_tuning(host, avg);
784 ret = mmc_send_tuning(host->mmc, opcode, NULL);
785 esdhc_post_tuning(host);
786
787 dev_dbg(mmc_dev(host->mmc), "tunning %s at 0x%x ret %d\n",
788 ret ? "failed" : "passed", avg, ret);
789
790 return ret;
791 }
792
793 static int esdhc_change_pinstate(struct sdhci_host *host,
794 unsigned int uhs)
795 {
796 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
797 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
798 struct pinctrl_state *pinctrl;
799
800 dev_dbg(mmc_dev(host->mmc), "change pinctrl state for uhs %d\n", uhs);
801
802 if (IS_ERR(imx_data->pinctrl) ||
803 IS_ERR(imx_data->pins_default) ||
804 IS_ERR(imx_data->pins_100mhz) ||
805 IS_ERR(imx_data->pins_200mhz))
806 return -EINVAL;
807
808 switch (uhs) {
809 case MMC_TIMING_UHS_SDR50:
810 pinctrl = imx_data->pins_100mhz;
811 break;
812 case MMC_TIMING_UHS_SDR104:
813 case MMC_TIMING_MMC_HS200:
814 case MMC_TIMING_MMC_HS400:
815 pinctrl = imx_data->pins_200mhz;
816 break;
817 default:
818 /* back to default state for other legacy timing */
819 pinctrl = imx_data->pins_default;
820 }
821
822 return pinctrl_select_state(imx_data->pinctrl, pinctrl);
823 }
824
825 /*
826 * For HS400 eMMC, there is a data_strobe line, this signal is generated
827 * by the device and used for data output and CRC status response output
828 * in HS400 mode. The frequency of this signal follows the frequency of
829 * CLK generated by host. Host receive the data which is aligned to the
830 * edge of data_strobe line. Due to the time delay between CLK line and
831 * data_strobe line, if the delay time is larger than one clock cycle,
832 * then CLK and data_strobe line will misaligned, read error shows up.
833 * So when the CLK is higher than 100MHz, each clock cycle is short enough,
834 * host should config the delay target.
835 */
836 static void esdhc_set_strobe_dll(struct sdhci_host *host)
837 {
838 u32 v;
839
840 if (host->mmc->actual_clock > ESDHC_STROBE_DLL_CLK_FREQ) {
841 /* force a reset on strobe dll */
842 writel(ESDHC_STROBE_DLL_CTRL_RESET,
843 host->ioaddr + ESDHC_STROBE_DLL_CTRL);
844 /*
845 * enable strobe dll ctrl and adjust the delay target
846 * for the uSDHC loopback read clock
847 */
848 v = ESDHC_STROBE_DLL_CTRL_ENABLE |
849 (7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT);
850 writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL);
851 /* wait 1us to make sure strobe dll status register stable */
852 udelay(1);
853 v = readl(host->ioaddr + ESDHC_STROBE_DLL_STATUS);
854 if (!(v & ESDHC_STROBE_DLL_STS_REF_LOCK))
855 dev_warn(mmc_dev(host->mmc),
856 "warning! HS400 strobe DLL status REF not lock!\n");
857 if (!(v & ESDHC_STROBE_DLL_STS_SLV_LOCK))
858 dev_warn(mmc_dev(host->mmc),
859 "warning! HS400 strobe DLL status SLV not lock!\n");
860 }
861 }
862
863 static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
864 {
865 u32 m;
866 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
867 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
868 struct esdhc_platform_data *boarddata = &imx_data->boarddata;
869
870 /* disable ddr mode and disable HS400 mode */
871 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
872 m &= ~(ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN);
873 imx_data->is_ddr = 0;
874
875 switch (timing) {
876 case MMC_TIMING_UHS_SDR12:
877 case MMC_TIMING_UHS_SDR25:
878 case MMC_TIMING_UHS_SDR50:
879 case MMC_TIMING_UHS_SDR104:
880 case MMC_TIMING_MMC_HS200:
881 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
882 break;
883 case MMC_TIMING_UHS_DDR50:
884 case MMC_TIMING_MMC_DDR52:
885 m |= ESDHC_MIX_CTRL_DDREN;
886 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
887 imx_data->is_ddr = 1;
888 if (boarddata->delay_line) {
889 u32 v;
890 v = boarddata->delay_line <<
891 ESDHC_DLL_OVERRIDE_VAL_SHIFT |
892 (1 << ESDHC_DLL_OVERRIDE_EN_SHIFT);
893 if (is_imx53_esdhc(imx_data))
894 v <<= 1;
895 writel(v, host->ioaddr + ESDHC_DLL_CTRL);
896 }
897 break;
898 case MMC_TIMING_MMC_HS400:
899 m |= ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN;
900 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
901 imx_data->is_ddr = 1;
902 esdhc_set_strobe_dll(host);
903 break;
904 }
905
906 esdhc_change_pinstate(host, timing);
907 }
908
909 static void esdhc_reset(struct sdhci_host *host, u8 mask)
910 {
911 sdhci_reset(host, mask);
912
913 sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
914 sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
915 }
916
917 static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host)
918 {
919 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
920 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
921
922 return esdhc_is_usdhc(imx_data) ? 1 << 28 : 1 << 27;
923 }
924
925 static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
926 {
927 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
928 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
929
930 /* use maximum timeout counter */
931 sdhci_writeb(host, esdhc_is_usdhc(imx_data) ? 0xF : 0xE,
932 SDHCI_TIMEOUT_CONTROL);
933 }
934
935 static struct sdhci_ops sdhci_esdhc_ops = {
936 .read_l = esdhc_readl_le,
937 .read_w = esdhc_readw_le,
938 .write_l = esdhc_writel_le,
939 .write_w = esdhc_writew_le,
940 .write_b = esdhc_writeb_le,
941 .set_clock = esdhc_pltfm_set_clock,
942 .get_max_clock = esdhc_pltfm_get_max_clock,
943 .get_min_clock = esdhc_pltfm_get_min_clock,
944 .get_max_timeout_count = esdhc_get_max_timeout_count,
945 .get_ro = esdhc_pltfm_get_ro,
946 .set_timeout = esdhc_set_timeout,
947 .set_bus_width = esdhc_pltfm_set_bus_width,
948 .set_uhs_signaling = esdhc_set_uhs_signaling,
949 .reset = esdhc_reset,
950 };
951
952 static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
953 .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT
954 | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
955 | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC
956 | SDHCI_QUIRK_BROKEN_CARD_DETECTION,
957 .ops = &sdhci_esdhc_ops,
958 };
959
960 #ifdef CONFIG_OF
961 static int
962 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
963 struct sdhci_host *host,
964 struct pltfm_imx_data *imx_data)
965 {
966 struct device_node *np = pdev->dev.of_node;
967 struct esdhc_platform_data *boarddata = &imx_data->boarddata;
968 int ret;
969
970 if (of_get_property(np, "fsl,wp-controller", NULL))
971 boarddata->wp_type = ESDHC_WP_CONTROLLER;
972
973 boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
974 if (gpio_is_valid(boarddata->wp_gpio))
975 boarddata->wp_type = ESDHC_WP_GPIO;
976
977 of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step);
978
979 if (of_find_property(np, "no-1-8-v", NULL))
980 boarddata->support_vsel = false;
981 else
982 boarddata->support_vsel = true;
983
984 if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line))
985 boarddata->delay_line = 0;
986
987 mmc_of_parse_voltage(np, &host->ocr_mask);
988
989 /* sdr50 and sdr104 needs work on 1.8v signal voltage */
990 if ((boarddata->support_vsel) && esdhc_is_usdhc(imx_data) &&
991 !IS_ERR(imx_data->pins_default)) {
992 imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
993 ESDHC_PINCTRL_STATE_100MHZ);
994 imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,
995 ESDHC_PINCTRL_STATE_200MHZ);
996 if (IS_ERR(imx_data->pins_100mhz) ||
997 IS_ERR(imx_data->pins_200mhz)) {
998 dev_warn(mmc_dev(host->mmc),
999 "could not get ultra high speed state, work on normal mode\n");
1000 /*
1001 * fall back to not support uhs by specify no 1.8v quirk
1002 */
1003 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1004 }
1005 } else {
1006 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1007 }
1008
1009 /* call to generic mmc_of_parse to support additional capabilities */
1010 ret = mmc_of_parse(host->mmc);
1011 if (ret)
1012 return ret;
1013
1014 if (!IS_ERR_VALUE(mmc_gpio_get_cd(host->mmc)))
1015 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1016
1017 return 0;
1018 }
1019 #else
1020 static inline int
1021 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
1022 struct sdhci_host *host,
1023 struct pltfm_imx_data *imx_data)
1024 {
1025 return -ENODEV;
1026 }
1027 #endif
1028
1029 static int sdhci_esdhc_imx_probe_nondt(struct platform_device *pdev,
1030 struct sdhci_host *host,
1031 struct pltfm_imx_data *imx_data)
1032 {
1033 struct esdhc_platform_data *boarddata = &imx_data->boarddata;
1034 int err;
1035
1036 if (!host->mmc->parent->platform_data) {
1037 dev_err(mmc_dev(host->mmc), "no board data!\n");
1038 return -EINVAL;
1039 }
1040
1041 imx_data->boarddata = *((struct esdhc_platform_data *)
1042 host->mmc->parent->platform_data);
1043 /* write_protect */
1044 if (boarddata->wp_type == ESDHC_WP_GPIO) {
1045 err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio);
1046 if (err) {
1047 dev_err(mmc_dev(host->mmc),
1048 "failed to request write-protect gpio!\n");
1049 return err;
1050 }
1051 host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
1052 }
1053
1054 /* card_detect */
1055 switch (boarddata->cd_type) {
1056 case ESDHC_CD_GPIO:
1057 err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0);
1058 if (err) {
1059 dev_err(mmc_dev(host->mmc),
1060 "failed to request card-detect gpio!\n");
1061 return err;
1062 }
1063 /* fall through */
1064
1065 case ESDHC_CD_CONTROLLER:
1066 /* we have a working card_detect back */
1067 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1068 break;
1069
1070 case ESDHC_CD_PERMANENT:
1071 host->mmc->caps |= MMC_CAP_NONREMOVABLE;
1072 break;
1073
1074 case ESDHC_CD_NONE:
1075 break;
1076 }
1077
1078 switch (boarddata->max_bus_width) {
1079 case 8:
1080 host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA;
1081 break;
1082 case 4:
1083 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
1084 break;
1085 case 1:
1086 default:
1087 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
1088 break;
1089 }
1090
1091 return 0;
1092 }
1093
1094 static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
1095 {
1096 const struct of_device_id *of_id =
1097 of_match_device(imx_esdhc_dt_ids, &pdev->dev);
1098 struct sdhci_pltfm_host *pltfm_host;
1099 struct sdhci_host *host;
1100 int err;
1101 struct pltfm_imx_data *imx_data;
1102
1103 host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata,
1104 sizeof(*imx_data));
1105 if (IS_ERR(host))
1106 return PTR_ERR(host);
1107
1108 pltfm_host = sdhci_priv(host);
1109
1110 imx_data = sdhci_pltfm_priv(pltfm_host);
1111
1112 imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *)
1113 pdev->id_entry->driver_data;
1114
1115 imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
1116 if (IS_ERR(imx_data->clk_ipg)) {
1117 err = PTR_ERR(imx_data->clk_ipg);
1118 goto free_sdhci;
1119 }
1120
1121 imx_data->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
1122 if (IS_ERR(imx_data->clk_ahb)) {
1123 err = PTR_ERR(imx_data->clk_ahb);
1124 goto free_sdhci;
1125 }
1126
1127 imx_data->clk_per = devm_clk_get(&pdev->dev, "per");
1128 if (IS_ERR(imx_data->clk_per)) {
1129 err = PTR_ERR(imx_data->clk_per);
1130 goto free_sdhci;
1131 }
1132
1133 pltfm_host->clk = imx_data->clk_per;
1134 pltfm_host->clock = clk_get_rate(pltfm_host->clk);
1135 clk_prepare_enable(imx_data->clk_per);
1136 clk_prepare_enable(imx_data->clk_ipg);
1137 clk_prepare_enable(imx_data->clk_ahb);
1138
1139 imx_data->pinctrl = devm_pinctrl_get(&pdev->dev);
1140 if (IS_ERR(imx_data->pinctrl)) {
1141 err = PTR_ERR(imx_data->pinctrl);
1142 goto disable_clk;
1143 }
1144
1145 imx_data->pins_default = pinctrl_lookup_state(imx_data->pinctrl,
1146 PINCTRL_STATE_DEFAULT);
1147 if (IS_ERR(imx_data->pins_default))
1148 dev_warn(mmc_dev(host->mmc), "could not get default state\n");
1149
1150 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
1151
1152 if (imx_data->socdata->flags & ESDHC_FLAG_ENGCM07207)
1153 /* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */
1154 host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK
1155 | SDHCI_QUIRK_BROKEN_ADMA;
1156
1157 /*
1158 * The imx6q ROM code will change the default watermark level setting
1159 * to something insane. Change it back here.
1160 */
1161 if (esdhc_is_usdhc(imx_data)) {
1162 writel(0x10401040, host->ioaddr + ESDHC_WTMK_LVL);
1163
1164 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
1165 host->mmc->caps |= MMC_CAP_1_8V_DDR;
1166
1167 /*
1168 * ROM code will change the bit burst_length_enable setting
1169 * to zero if this usdhc is choosed to boot system. Change
1170 * it back here, otherwise it will impact the performance a
1171 * lot. This bit is used to enable/disable the burst length
1172 * for the external AHB2AXI bridge, it's usefully especially
1173 * for INCR transfer because without burst length indicator,
1174 * the AHB2AXI bridge does not know the burst length in
1175 * advance. And without burst length indicator, AHB INCR
1176 * transfer can only be converted to singles on the AXI side.
1177 */
1178 writel(readl(host->ioaddr + SDHCI_HOST_CONTROL)
1179 | ESDHC_BURST_LEN_EN_INCR,
1180 host->ioaddr + SDHCI_HOST_CONTROL);
1181
1182 if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
1183 host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
1184
1185 /*
1186 * errata ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL
1187 * TO1.1, it's harmless for MX6SL
1188 */
1189 writel(readl(host->ioaddr + 0x6c) | BIT(7),
1190 host->ioaddr + 0x6c);
1191 }
1192
1193 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
1194 sdhci_esdhc_ops.platform_execute_tuning =
1195 esdhc_executing_tuning;
1196
1197 if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
1198 writel(readl(host->ioaddr + ESDHC_TUNING_CTRL) |
1199 ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP,
1200 host->ioaddr + ESDHC_TUNING_CTRL);
1201
1202 if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536)
1203 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1204
1205 if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
1206 host->quirks2 |= SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400;
1207
1208 if (of_id)
1209 err = sdhci_esdhc_imx_probe_dt(pdev, host, imx_data);
1210 else
1211 err = sdhci_esdhc_imx_probe_nondt(pdev, host, imx_data);
1212 if (err)
1213 goto disable_clk;
1214
1215 err = sdhci_add_host(host);
1216 if (err)
1217 goto disable_clk;
1218
1219 pm_runtime_set_active(&pdev->dev);
1220 pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
1221 pm_runtime_use_autosuspend(&pdev->dev);
1222 pm_suspend_ignore_children(&pdev->dev, 1);
1223 pm_runtime_enable(&pdev->dev);
1224
1225 return 0;
1226
1227 disable_clk:
1228 clk_disable_unprepare(imx_data->clk_per);
1229 clk_disable_unprepare(imx_data->clk_ipg);
1230 clk_disable_unprepare(imx_data->clk_ahb);
1231 free_sdhci:
1232 sdhci_pltfm_free(pdev);
1233 return err;
1234 }
1235
1236 static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
1237 {
1238 struct sdhci_host *host = platform_get_drvdata(pdev);
1239 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1240 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1241 int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
1242
1243 pm_runtime_get_sync(&pdev->dev);
1244 pm_runtime_disable(&pdev->dev);
1245 pm_runtime_put_noidle(&pdev->dev);
1246
1247 sdhci_remove_host(host, dead);
1248
1249 clk_disable_unprepare(imx_data->clk_per);
1250 clk_disable_unprepare(imx_data->clk_ipg);
1251 clk_disable_unprepare(imx_data->clk_ahb);
1252
1253 sdhci_pltfm_free(pdev);
1254
1255 return 0;
1256 }
1257
1258 #ifdef CONFIG_PM
1259 static int sdhci_esdhc_runtime_suspend(struct device *dev)
1260 {
1261 struct sdhci_host *host = dev_get_drvdata(dev);
1262 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1263 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1264 int ret;
1265
1266 ret = sdhci_runtime_suspend_host(host);
1267
1268 if (!sdhci_sdio_irq_enabled(host)) {
1269 clk_disable_unprepare(imx_data->clk_per);
1270 clk_disable_unprepare(imx_data->clk_ipg);
1271 }
1272 clk_disable_unprepare(imx_data->clk_ahb);
1273
1274 return ret;
1275 }
1276
1277 static int sdhci_esdhc_runtime_resume(struct device *dev)
1278 {
1279 struct sdhci_host *host = dev_get_drvdata(dev);
1280 struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1281 struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1282
1283 if (!sdhci_sdio_irq_enabled(host)) {
1284 clk_prepare_enable(imx_data->clk_per);
1285 clk_prepare_enable(imx_data->clk_ipg);
1286 }
1287 clk_prepare_enable(imx_data->clk_ahb);
1288
1289 return sdhci_runtime_resume_host(host);
1290 }
1291 #endif
1292
1293 static const struct dev_pm_ops sdhci_esdhc_pmops = {
1294 SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
1295 SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend,
1296 sdhci_esdhc_runtime_resume, NULL)
1297 };
1298
1299 static struct platform_driver sdhci_esdhc_imx_driver = {
1300 .driver = {
1301 .name = "sdhci-esdhc-imx",
1302 .of_match_table = imx_esdhc_dt_ids,
1303 .pm = &sdhci_esdhc_pmops,
1304 },
1305 .id_table = imx_esdhc_devtype,
1306 .probe = sdhci_esdhc_imx_probe,
1307 .remove = sdhci_esdhc_imx_remove,
1308 };
1309
1310 module_platform_driver(sdhci_esdhc_imx_driver);
1311
1312 MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
1313 MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
1314 MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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