projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mmc: omap: add DMA engine support
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mmc / host / omap_hsmmc.c
1 /*
2 * drivers/mmc/host/omap_hsmmc.c
3 *
4 * Driver for OMAP2430/3430 MMC controller.
5 *
6 * Copyright (C) 2007 Texas Instruments.
7 *
8 * Authors:
9 * Syed Mohammed Khasim <x0khasim@ti.com>
10 * Madhusudhan <madhu.cr@ti.com>
11 * Mohit Jalori <mjalori@ti.com>
12 *
13 * This file is licensed under the terms of the GNU General Public License
14 * version 2. This program is licensed "as is" without any warranty of any
15 * kind, whether express or implied.
16 */
17
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/debugfs.h>
22 #include <linux/dmaengine.h>
23 #include <linux/seq_file.h>
24 #include <linux/interrupt.h>
25 #include <linux/delay.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/platform_device.h>
28 #include <linux/timer.h>
29 #include <linux/clk.h>
30 #include <linux/of.h>
31 #include <linux/of_gpio.h>
32 #include <linux/of_device.h>
33 #include <linux/omap-dma.h>
34 #include <linux/mmc/host.h>
35 #include <linux/mmc/core.h>
36 #include <linux/mmc/mmc.h>
37 #include <linux/io.h>
38 #include <linux/semaphore.h>
39 #include <linux/gpio.h>
40 #include <linux/regulator/consumer.h>
41 #include <linux/pm_runtime.h>
42 #include <mach/hardware.h>
43 #include <plat/board.h>
44 #include <plat/mmc.h>
45 #include <plat/cpu.h>
46
47 /* OMAP HSMMC Host Controller Registers */
48 #define OMAP_HSMMC_SYSCONFIG 0x0010
49 #define OMAP_HSMMC_SYSSTATUS 0x0014
50 #define OMAP_HSMMC_CON 0x002C
51 #define OMAP_HSMMC_BLK 0x0104
52 #define OMAP_HSMMC_ARG 0x0108
53 #define OMAP_HSMMC_CMD 0x010C
54 #define OMAP_HSMMC_RSP10 0x0110
55 #define OMAP_HSMMC_RSP32 0x0114
56 #define OMAP_HSMMC_RSP54 0x0118
57 #define OMAP_HSMMC_RSP76 0x011C
58 #define OMAP_HSMMC_DATA 0x0120
59 #define OMAP_HSMMC_HCTL 0x0128
60 #define OMAP_HSMMC_SYSCTL 0x012C
61 #define OMAP_HSMMC_STAT 0x0130
62 #define OMAP_HSMMC_IE 0x0134
63 #define OMAP_HSMMC_ISE 0x0138
64 #define OMAP_HSMMC_CAPA 0x0140
65
66 #define VS18 (1 << 26)
67 #define VS30 (1 << 25)
68 #define SDVS18 (0x5 << 9)
69 #define SDVS30 (0x6 << 9)
70 #define SDVS33 (0x7 << 9)
71 #define SDVS_MASK 0x00000E00
72 #define SDVSCLR 0xFFFFF1FF
73 #define SDVSDET 0x00000400
74 #define AUTOIDLE 0x1
75 #define SDBP (1 << 8)
76 #define DTO 0xe
77 #define ICE 0x1
78 #define ICS 0x2
79 #define CEN (1 << 2)
80 #define CLKD_MASK 0x0000FFC0
81 #define CLKD_SHIFT 6
82 #define DTO_MASK 0x000F0000
83 #define DTO_SHIFT 16
84 #define INT_EN_MASK 0x307F0033
85 #define BWR_ENABLE (1 << 4)
86 #define BRR_ENABLE (1 << 5)
87 #define DTO_ENABLE (1 << 20)
88 #define INIT_STREAM (1 << 1)
89 #define DP_SELECT (1 << 21)
90 #define DDIR (1 << 4)
91 #define DMA_EN 0x1
92 #define MSBS (1 << 5)
93 #define BCE (1 << 1)
94 #define FOUR_BIT (1 << 1)
95 #define DDR (1 << 19)
96 #define DW8 (1 << 5)
97 #define CC 0x1
98 #define TC 0x02
99 #define OD 0x1
100 #define ERR (1 << 15)
101 #define CMD_TIMEOUT (1 << 16)
102 #define DATA_TIMEOUT (1 << 20)
103 #define CMD_CRC (1 << 17)
104 #define DATA_CRC (1 << 21)
105 #define CARD_ERR (1 << 28)
106 #define STAT_CLEAR 0xFFFFFFFF
107 #define INIT_STREAM_CMD 0x00000000
108 #define DUAL_VOLT_OCR_BIT 7
109 #define SRC (1 << 25)
110 #define SRD (1 << 26)
111 #define SOFTRESET (1 << 1)
112 #define RESETDONE (1 << 0)
113
114 #define MMC_AUTOSUSPEND_DELAY 100
115 #define MMC_TIMEOUT_MS 20
116 #define OMAP_MMC_MIN_CLOCK 400000
117 #define OMAP_MMC_MAX_CLOCK 52000000
118 #define DRIVER_NAME "omap_hsmmc"
119
120 /*
121 * One controller can have multiple slots, like on some omap boards using
122 * omap.c controller driver. Luckily this is not currently done on any known
123 * omap_hsmmc.c device.
124 */
125 #define mmc_slot(host) (host->pdata->slots[host->slot_id])
126
127 /*
128 * MMC Host controller read/write API's
129 */
130 #define OMAP_HSMMC_READ(base, reg) \
131 __raw_readl((base) + OMAP_HSMMC_##reg)
132
133 #define OMAP_HSMMC_WRITE(base, reg, val) \
134 __raw_writel((val), (base) + OMAP_HSMMC_##reg)
135
136 struct omap_hsmmc_next {
137 unsigned int dma_len;
138 s32 cookie;
139 };
140
141 struct omap_hsmmc_host {
142 struct device *dev;
143 struct mmc_host *mmc;
144 struct mmc_request *mrq;
145 struct mmc_command *cmd;
146 struct mmc_data *data;
147 struct clk *fclk;
148 struct clk *dbclk;
149 /*
150 * vcc == configured supply
151 * vcc_aux == optional
152 * - MMC1, supply for DAT4..DAT7
153 * - MMC2/MMC2, external level shifter voltage supply, for
154 * chip (SDIO, eMMC, etc) or transceiver (MMC2 only)
155 */
156 struct regulator *vcc;
157 struct regulator *vcc_aux;
158 void __iomem *base;
159 resource_size_t mapbase;
160 spinlock_t irq_lock; /* Prevent races with irq handler */
161 unsigned int dma_len;
162 unsigned int dma_sg_idx;
163 unsigned char bus_mode;
164 unsigned char power_mode;
165 u32 *buffer;
166 u32 bytesleft;
167 int suspended;
168 int irq;
169 int use_dma, dma_ch;
170 struct dma_chan *tx_chan;
171 struct dma_chan *rx_chan;
172 int slot_id;
173 int response_busy;
174 int context_loss;
175 int vdd;
176 int protect_card;
177 int reqs_blocked;
178 int use_reg;
179 int req_in_progress;
180 struct omap_hsmmc_next next_data;
181
182 struct omap_mmc_platform_data *pdata;
183 };
184
185 static int omap_hsmmc_card_detect(struct device *dev, int slot)
186 {
187 struct omap_mmc_platform_data *mmc = dev->platform_data;
188
189 /* NOTE: assumes card detect signal is active-low */
190 return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
191 }
192
193 static int omap_hsmmc_get_wp(struct device *dev, int slot)
194 {
195 struct omap_mmc_platform_data *mmc = dev->platform_data;
196
197 /* NOTE: assumes write protect signal is active-high */
198 return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
199 }
200
201 static int omap_hsmmc_get_cover_state(struct device *dev, int slot)
202 {
203 struct omap_mmc_platform_data *mmc = dev->platform_data;
204
205 /* NOTE: assumes card detect signal is active-low */
206 return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
207 }
208
209 #ifdef CONFIG_PM
210
211 static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot)
212 {
213 struct omap_mmc_platform_data *mmc = dev->platform_data;
214
215 disable_irq(mmc->slots[0].card_detect_irq);
216 return 0;
217 }
218
219 static int omap_hsmmc_resume_cdirq(struct device *dev, int slot)
220 {
221 struct omap_mmc_platform_data *mmc = dev->platform_data;
222
223 enable_irq(mmc->slots[0].card_detect_irq);
224 return 0;
225 }
226
227 #else
228
229 #define omap_hsmmc_suspend_cdirq NULL
230 #define omap_hsmmc_resume_cdirq NULL
231
232 #endif
233
234 #ifdef CONFIG_REGULATOR
235
236 static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
237 int vdd)
238 {
239 struct omap_hsmmc_host *host =
240 platform_get_drvdata(to_platform_device(dev));
241 int ret = 0;
242
243 /*
244 * If we don't see a Vcc regulator, assume it's a fixed
245 * voltage always-on regulator.
246 */
247 if (!host->vcc)
248 return 0;
249 /*
250 * With DT, never turn OFF the regulator. This is because
251 * the pbias cell programming support is still missing when
252 * booting with Device tree
253 */
254 if (dev->of_node && !vdd)
255 return 0;
256
257 if (mmc_slot(host).before_set_reg)
258 mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
259
260 /*
261 * Assume Vcc regulator is used only to power the card ... OMAP
262 * VDDS is used to power the pins, optionally with a transceiver to
263 * support cards using voltages other than VDDS (1.8V nominal). When a
264 * transceiver is used, DAT3..7 are muxed as transceiver control pins.
265 *
266 * In some cases this regulator won't support enable/disable;
267 * e.g. it's a fixed rail for a WLAN chip.
268 *
269 * In other cases vcc_aux switches interface power. Example, for
270 * eMMC cards it represents VccQ. Sometimes transceivers or SDIO
271 * chips/cards need an interface voltage rail too.
272 */
273 if (power_on) {
274 ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd);
275 /* Enable interface voltage rail, if needed */
276 if (ret == 0 && host->vcc_aux) {
277 ret = regulator_enable(host->vcc_aux);
278 if (ret < 0)
279 ret = mmc_regulator_set_ocr(host->mmc,
280 host->vcc, 0);
281 }
282 } else {
283 /* Shut down the rail */
284 if (host->vcc_aux)
285 ret = regulator_disable(host->vcc_aux);
286 if (!ret) {
287 /* Then proceed to shut down the local regulator */
288 ret = mmc_regulator_set_ocr(host->mmc,
289 host->vcc, 0);
290 }
291 }
292
293 if (mmc_slot(host).after_set_reg)
294 mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
295
296 return ret;
297 }
298
299 static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
300 {
301 struct regulator *reg;
302 int ocr_value = 0;
303
304 mmc_slot(host).set_power = omap_hsmmc_set_power;
305
306 reg = regulator_get(host->dev, "vmmc");
307 if (IS_ERR(reg)) {
308 dev_dbg(host->dev, "vmmc regulator missing\n");
309 } else {
310 host->vcc = reg;
311 ocr_value = mmc_regulator_get_ocrmask(reg);
312 if (!mmc_slot(host).ocr_mask) {
313 mmc_slot(host).ocr_mask = ocr_value;
314 } else {
315 if (!(mmc_slot(host).ocr_mask & ocr_value)) {
316 dev_err(host->dev, "ocrmask %x is not supported\n",
317 mmc_slot(host).ocr_mask);
318 mmc_slot(host).ocr_mask = 0;
319 return -EINVAL;
320 }
321 }
322
323 /* Allow an aux regulator */
324 reg = regulator_get(host->dev, "vmmc_aux");
325 host->vcc_aux = IS_ERR(reg) ? NULL : reg;
326
327 /* For eMMC do not power off when not in sleep state */
328 if (mmc_slot(host).no_regulator_off_init)
329 return 0;
330 /*
331 * UGLY HACK: workaround regulator framework bugs.
332 * When the bootloader leaves a supply active, it's
333 * initialized with zero usecount ... and we can't
334 * disable it without first enabling it. Until the
335 * framework is fixed, we need a workaround like this
336 * (which is safe for MMC, but not in general).
337 */
338 if (regulator_is_enabled(host->vcc) > 0 ||
339 (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) {
340 int vdd = ffs(mmc_slot(host).ocr_mask) - 1;
341
342 mmc_slot(host).set_power(host->dev, host->slot_id,
343 1, vdd);
344 mmc_slot(host).set_power(host->dev, host->slot_id,
345 0, 0);
346 }
347 }
348
349 return 0;
350 }
351
352 static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
353 {
354 regulator_put(host->vcc);
355 regulator_put(host->vcc_aux);
356 mmc_slot(host).set_power = NULL;
357 }
358
359 static inline int omap_hsmmc_have_reg(void)
360 {
361 return 1;
362 }
363
364 #else
365
366 static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
367 {
368 return -EINVAL;
369 }
370
371 static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
372 {
373 }
374
375 static inline int omap_hsmmc_have_reg(void)
376 {
377 return 0;
378 }
379
380 #endif
381
382 static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata)
383 {
384 int ret;
385
386 if (gpio_is_valid(pdata->slots[0].switch_pin)) {
387 if (pdata->slots[0].cover)
388 pdata->slots[0].get_cover_state =
389 omap_hsmmc_get_cover_state;
390 else
391 pdata->slots[0].card_detect = omap_hsmmc_card_detect;
392 pdata->slots[0].card_detect_irq =
393 gpio_to_irq(pdata->slots[0].switch_pin);
394 ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd");
395 if (ret)
396 return ret;
397 ret = gpio_direction_input(pdata->slots[0].switch_pin);
398 if (ret)
399 goto err_free_sp;
400 } else
401 pdata->slots[0].switch_pin = -EINVAL;
402
403 if (gpio_is_valid(pdata->slots[0].gpio_wp)) {
404 pdata->slots[0].get_ro = omap_hsmmc_get_wp;
405 ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp");
406 if (ret)
407 goto err_free_cd;
408 ret = gpio_direction_input(pdata->slots[0].gpio_wp);
409 if (ret)
410 goto err_free_wp;
411 } else
412 pdata->slots[0].gpio_wp = -EINVAL;
413
414 return 0;
415
416 err_free_wp:
417 gpio_free(pdata->slots[0].gpio_wp);
418 err_free_cd:
419 if (gpio_is_valid(pdata->slots[0].switch_pin))
420 err_free_sp:
421 gpio_free(pdata->slots[0].switch_pin);
422 return ret;
423 }
424
425 static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata)
426 {
427 if (gpio_is_valid(pdata->slots[0].gpio_wp))
428 gpio_free(pdata->slots[0].gpio_wp);
429 if (gpio_is_valid(pdata->slots[0].switch_pin))
430 gpio_free(pdata->slots[0].switch_pin);
431 }
432
433 /*
434 * Start clock to the card
435 */
436 static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host)
437 {
438 OMAP_HSMMC_WRITE(host->base, SYSCTL,
439 OMAP_HSMMC_READ(host->base, SYSCTL) | CEN);
440 }
441
442 /*
443 * Stop clock to the card
444 */
445 static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host)
446 {
447 OMAP_HSMMC_WRITE(host->base, SYSCTL,
448 OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN);
449 if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0)
450 dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n");
451 }
452
453 static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host,
454 struct mmc_command *cmd)
455 {
456 unsigned int irq_mask;
457
458 if (host->use_dma)
459 irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE);
460 else
461 irq_mask = INT_EN_MASK;
462
463 /* Disable timeout for erases */
464 if (cmd->opcode == MMC_ERASE)
465 irq_mask &= ~DTO_ENABLE;
466
467 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
468 OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
469 OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
470 }
471
472 static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host)
473 {
474 OMAP_HSMMC_WRITE(host->base, ISE, 0);
475 OMAP_HSMMC_WRITE(host->base, IE, 0);
476 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
477 }
478
479 /* Calculate divisor for the given clock frequency */
480 static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
481 {
482 u16 dsor = 0;
483
484 if (ios->clock) {
485 dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
486 if (dsor > 250)
487 dsor = 250;
488 }
489
490 return dsor;
491 }
492
493 static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host)
494 {
495 struct mmc_ios *ios = &host->mmc->ios;
496 unsigned long regval;
497 unsigned long timeout;
498
499 dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock);
500
501 omap_hsmmc_stop_clock(host);
502
503 regval = OMAP_HSMMC_READ(host->base, SYSCTL);
504 regval = regval & ~(CLKD_MASK | DTO_MASK);
505 regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16);
506 OMAP_HSMMC_WRITE(host->base, SYSCTL, regval);
507 OMAP_HSMMC_WRITE(host->base, SYSCTL,
508 OMAP_HSMMC_READ(host->base, SYSCTL) | ICE);
509
510 /* Wait till the ICS bit is set */
511 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
512 while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS
513 && time_before(jiffies, timeout))
514 cpu_relax();
515
516 omap_hsmmc_start_clock(host);
517 }
518
519 static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host)
520 {
521 struct mmc_ios *ios = &host->mmc->ios;
522 u32 con;
523
524 con = OMAP_HSMMC_READ(host->base, CON);
525 if (ios->timing == MMC_TIMING_UHS_DDR50)
526 con |= DDR; /* configure in DDR mode */
527 else
528 con &= ~DDR;
529 switch (ios->bus_width) {
530 case MMC_BUS_WIDTH_8:
531 OMAP_HSMMC_WRITE(host->base, CON, con | DW8);
532 break;
533 case MMC_BUS_WIDTH_4:
534 OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
535 OMAP_HSMMC_WRITE(host->base, HCTL,
536 OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT);
537 break;
538 case MMC_BUS_WIDTH_1:
539 OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
540 OMAP_HSMMC_WRITE(host->base, HCTL,
541 OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT);
542 break;
543 }
544 }
545
546 static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host)
547 {
548 struct mmc_ios *ios = &host->mmc->ios;
549 u32 con;
550
551 con = OMAP_HSMMC_READ(host->base, CON);
552 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
553 OMAP_HSMMC_WRITE(host->base, CON, con | OD);
554 else
555 OMAP_HSMMC_WRITE(host->base, CON, con & ~OD);
556 }
557
558 #ifdef CONFIG_PM
559
560 /*
561 * Restore the MMC host context, if it was lost as result of a
562 * power state change.
563 */
564 static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
565 {
566 struct mmc_ios *ios = &host->mmc->ios;
567 struct omap_mmc_platform_data *pdata = host->pdata;
568 int context_loss = 0;
569 u32 hctl, capa;
570 unsigned long timeout;
571
572 if (pdata->get_context_loss_count) {
573 context_loss = pdata->get_context_loss_count(host->dev);
574 if (context_loss < 0)
575 return 1;
576 }
577
578 dev_dbg(mmc_dev(host->mmc), "context was %slost\n",
579 context_loss == host->context_loss ? "not " : "");
580 if (host->context_loss == context_loss)
581 return 1;
582
583 /* Wait for hardware reset */
584 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
585 while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
586 && time_before(jiffies, timeout))
587 ;
588
589 /* Do software reset */
590 OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET);
591 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
592 while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
593 && time_before(jiffies, timeout))
594 ;
595
596 OMAP_HSMMC_WRITE(host->base, SYSCONFIG,
597 OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE);
598
599 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
600 if (host->power_mode != MMC_POWER_OFF &&
601 (1 << ios->vdd) <= MMC_VDD_23_24)
602 hctl = SDVS18;
603 else
604 hctl = SDVS30;
605 capa = VS30 | VS18;
606 } else {
607 hctl = SDVS18;
608 capa = VS18;
609 }
610
611 OMAP_HSMMC_WRITE(host->base, HCTL,
612 OMAP_HSMMC_READ(host->base, HCTL) | hctl);
613
614 OMAP_HSMMC_WRITE(host->base, CAPA,
615 OMAP_HSMMC_READ(host->base, CAPA) | capa);
616
617 OMAP_HSMMC_WRITE(host->base, HCTL,
618 OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
619
620 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
621 while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP
622 && time_before(jiffies, timeout))
623 ;
624
625 omap_hsmmc_disable_irq(host);
626
627 /* Do not initialize card-specific things if the power is off */
628 if (host->power_mode == MMC_POWER_OFF)
629 goto out;
630
631 omap_hsmmc_set_bus_width(host);
632
633 omap_hsmmc_set_clock(host);
634
635 omap_hsmmc_set_bus_mode(host);
636
637 out:
638 host->context_loss = context_loss;
639
640 dev_dbg(mmc_dev(host->mmc), "context is restored\n");
641 return 0;
642 }
643
644 /*
645 * Save the MMC host context (store the number of power state changes so far).
646 */
647 static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
648 {
649 struct omap_mmc_platform_data *pdata = host->pdata;
650 int context_loss;
651
652 if (pdata->get_context_loss_count) {
653 context_loss = pdata->get_context_loss_count(host->dev);
654 if (context_loss < 0)
655 return;
656 host->context_loss = context_loss;
657 }
658 }
659
660 #else
661
662 static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
663 {
664 return 0;
665 }
666
667 static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
668 {
669 }
670
671 #endif
672
673 /*
674 * Send init stream sequence to card
675 * before sending IDLE command
676 */
677 static void send_init_stream(struct omap_hsmmc_host *host)
678 {
679 int reg = 0;
680 unsigned long timeout;
681
682 if (host->protect_card)
683 return;
684
685 disable_irq(host->irq);
686
687 OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);
688 OMAP_HSMMC_WRITE(host->base, CON,
689 OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM);
690 OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD);
691
692 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
693 while ((reg != CC) && time_before(jiffies, timeout))
694 reg = OMAP_HSMMC_READ(host->base, STAT) & CC;
695
696 OMAP_HSMMC_WRITE(host->base, CON,
697 OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM);
698
699 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
700 OMAP_HSMMC_READ(host->base, STAT);
701
702 enable_irq(host->irq);
703 }
704
705 static inline
706 int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host)
707 {
708 int r = 1;
709
710 if (mmc_slot(host).get_cover_state)
711 r = mmc_slot(host).get_cover_state(host->dev, host->slot_id);
712 return r;
713 }
714
715 static ssize_t
716 omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr,
717 char *buf)
718 {
719 struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
720 struct omap_hsmmc_host *host = mmc_priv(mmc);
721
722 return sprintf(buf, "%s\n",
723 omap_hsmmc_cover_is_closed(host) ? "closed" : "open");
724 }
725
726 static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL);
727
728 static ssize_t
729 omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr,
730 char *buf)
731 {
732 struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
733 struct omap_hsmmc_host *host = mmc_priv(mmc);
734
735 return sprintf(buf, "%s\n", mmc_slot(host).name);
736 }
737
738 static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL);
739
740 /*
741 * Configure the response type and send the cmd.
742 */
743 static void
744 omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
745 struct mmc_data *data)
746 {
747 int cmdreg = 0, resptype = 0, cmdtype = 0;
748
749 dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n",
750 mmc_hostname(host->mmc), cmd->opcode, cmd->arg);
751 host->cmd = cmd;
752
753 omap_hsmmc_enable_irq(host, cmd);
754
755 host->response_busy = 0;
756 if (cmd->flags & MMC_RSP_PRESENT) {
757 if (cmd->flags & MMC_RSP_136)
758 resptype = 1;
759 else if (cmd->flags & MMC_RSP_BUSY) {
760 resptype = 3;
761 host->response_busy = 1;
762 } else
763 resptype = 2;
764 }
765
766 /*
767 * Unlike OMAP1 controller, the cmdtype does not seem to be based on
768 * ac, bc, adtc, bcr. Only commands ending an open ended transfer need
769 * a val of 0x3, rest 0x0.
770 */
771 if (cmd == host->mrq->stop)
772 cmdtype = 0x3;
773
774 cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22);
775
776 if (data) {
777 cmdreg |= DP_SELECT | MSBS | BCE;
778 if (data->flags & MMC_DATA_READ)
779 cmdreg |= DDIR;
780 else
781 cmdreg &= ~(DDIR);
782 }
783
784 if (host->use_dma)
785 cmdreg |= DMA_EN;
786
787 host->req_in_progress = 1;
788
789 OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg);
790 OMAP_HSMMC_WRITE(host->base, CMD, cmdreg);
791 }
792
793 static int
794 omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data)
795 {
796 if (data->flags & MMC_DATA_WRITE)
797 return DMA_TO_DEVICE;
798 else
799 return DMA_FROM_DEVICE;
800 }
801
802 static struct dma_chan *omap_hsmmc_get_dma_chan(struct omap_hsmmc_host *host,
803 struct mmc_data *data)
804 {
805 return data->flags & MMC_DATA_WRITE ? host->tx_chan : host->rx_chan;
806 }
807
808 static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq)
809 {
810 int dma_ch;
811 unsigned long flags;
812
813 spin_lock_irqsave(&host->irq_lock, flags);
814 host->req_in_progress = 0;
815 dma_ch = host->dma_ch;
816 spin_unlock_irqrestore(&host->irq_lock, flags);
817
818 omap_hsmmc_disable_irq(host);
819 /* Do not complete the request if DMA is still in progress */
820 if (mrq->data && host->use_dma && dma_ch != -1)
821 return;
822 host->mrq = NULL;
823 mmc_request_done(host->mmc, mrq);
824 }
825
826 /*
827 * Notify the transfer complete to MMC core
828 */
829 static void
830 omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data)
831 {
832 if (!data) {
833 struct mmc_request *mrq = host->mrq;
834
835 /* TC before CC from CMD6 - don't know why, but it happens */
836 if (host->cmd && host->cmd->opcode == 6 &&
837 host->response_busy) {
838 host->response_busy = 0;
839 return;
840 }
841
842 omap_hsmmc_request_done(host, mrq);
843 return;
844 }
845
846 host->data = NULL;
847
848 if (!data->error)
849 data->bytes_xfered += data->blocks * (data->blksz);
850 else
851 data->bytes_xfered = 0;
852
853 if (!data->stop) {
854 omap_hsmmc_request_done(host, data->mrq);
855 return;
856 }
857 omap_hsmmc_start_command(host, data->stop, NULL);
858 }
859
860 /*
861 * Notify the core about command completion
862 */
863 static void
864 omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd)
865 {
866 host->cmd = NULL;
867
868 if (cmd->flags & MMC_RSP_PRESENT) {
869 if (cmd->flags & MMC_RSP_136) {
870 /* response type 2 */
871 cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10);
872 cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32);
873 cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54);
874 cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76);
875 } else {
876 /* response types 1, 1b, 3, 4, 5, 6 */
877 cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10);
878 }
879 }
880 if ((host->data == NULL && !host->response_busy) || cmd->error)
881 omap_hsmmc_request_done(host, cmd->mrq);
882 }
883
884 /*
885 * DMA clean up for command errors
886 */
887 static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
888 {
889 int dma_ch;
890 unsigned long flags;
891
892 host->data->error = errno;
893
894 spin_lock_irqsave(&host->irq_lock, flags);
895 dma_ch = host->dma_ch;
896 host->dma_ch = -1;
897 spin_unlock_irqrestore(&host->irq_lock, flags);
898
899 if (host->use_dma && dma_ch != -1) {
900 struct dma_chan *chan = omap_hsmmc_get_dma_chan(host, host->data);
901
902 dmaengine_terminate_all(chan);
903 dma_unmap_sg(chan->device->dev,
904 host->data->sg, host->data->sg_len,
905 omap_hsmmc_get_dma_dir(host, host->data));
906
907 host->data->host_cookie = 0;
908 }
909 host->data = NULL;
910 }
911
912 /*
913 * Readable error output
914 */
915 #ifdef CONFIG_MMC_DEBUG
916 static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status)
917 {
918 /* --- means reserved bit without definition at documentation */
919 static const char *omap_hsmmc_status_bits[] = {
920 "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" ,
921 "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI",
922 "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" ,
923 "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---"
924 };
925 char res[256];
926 char *buf = res;
927 int len, i;
928
929 len = sprintf(buf, "MMC IRQ 0x%x :", status);
930 buf += len;
931
932 for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++)
933 if (status & (1 << i)) {
934 len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]);
935 buf += len;
936 }
937
938 dev_dbg(mmc_dev(host->mmc), "%s\n", res);
939 }
940 #else
941 static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host,
942 u32 status)
943 {
944 }
945 #endif /* CONFIG_MMC_DEBUG */
946
947 /*
948 * MMC controller internal state machines reset
949 *
950 * Used to reset command or data internal state machines, using respectively
951 * SRC or SRD bit of SYSCTL register
952 * Can be called from interrupt context
953 */
954 static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host,
955 unsigned long bit)
956 {
957 unsigned long i = 0;
958 unsigned long limit = (loops_per_jiffy *
959 msecs_to_jiffies(MMC_TIMEOUT_MS));
960
961 OMAP_HSMMC_WRITE(host->base, SYSCTL,
962 OMAP_HSMMC_READ(host->base, SYSCTL) | bit);
963
964 /*
965 * OMAP4 ES2 and greater has an updated reset logic.
966 * Monitor a 0->1 transition first
967 */
968 if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) {
969 while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit))
970 && (i++ < limit))
971 cpu_relax();
972 }
973 i = 0;
974
975 while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) &&
976 (i++ < limit))
977 cpu_relax();
978
979 if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit)
980 dev_err(mmc_dev(host->mmc),
981 "Timeout waiting on controller reset in %s\n",
982 __func__);
983 }
984
985 static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status)
986 {
987 struct mmc_data *data;
988 int end_cmd = 0, end_trans = 0;
989
990 if (!host->req_in_progress) {
991 do {
992 OMAP_HSMMC_WRITE(host->base, STAT, status);
993 /* Flush posted write */
994 status = OMAP_HSMMC_READ(host->base, STAT);
995 } while (status & INT_EN_MASK);
996 return;
997 }
998
999 data = host->data;
1000 dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
1001
1002 if (status & ERR) {
1003 omap_hsmmc_dbg_report_irq(host, status);
1004 if ((status & CMD_TIMEOUT) ||
1005 (status & CMD_CRC)) {
1006 if (host->cmd) {
1007 if (status & CMD_TIMEOUT) {
1008 omap_hsmmc_reset_controller_fsm(host,
1009 SRC);
1010 host->cmd->error = -ETIMEDOUT;
1011 } else {
1012 host->cmd->error = -EILSEQ;
1013 }
1014 end_cmd = 1;
1015 }
1016 if (host->data || host->response_busy) {
1017 if (host->data)
1018 omap_hsmmc_dma_cleanup(host,
1019 -ETIMEDOUT);
1020 host->response_busy = 0;
1021 omap_hsmmc_reset_controller_fsm(host, SRD);
1022 }
1023 }
1024 if ((status & DATA_TIMEOUT) ||
1025 (status & DATA_CRC)) {
1026 if (host->data || host->response_busy) {
1027 int err = (status & DATA_TIMEOUT) ?
1028 -ETIMEDOUT : -EILSEQ;
1029
1030 if (host->data)
1031 omap_hsmmc_dma_cleanup(host, err);
1032 else
1033 host->mrq->cmd->error = err;
1034 host->response_busy = 0;
1035 omap_hsmmc_reset_controller_fsm(host, SRD);
1036 end_trans = 1;
1037 }
1038 }
1039 if (status & CARD_ERR) {
1040 dev_dbg(mmc_dev(host->mmc),
1041 "Ignoring card err CMD%d\n", host->cmd->opcode);
1042 if (host->cmd)
1043 end_cmd = 1;
1044 if (host->data)
1045 end_trans = 1;
1046 }
1047 }
1048
1049 OMAP_HSMMC_WRITE(host->base, STAT, status);
1050
1051 if (end_cmd || ((status & CC) && host->cmd))
1052 omap_hsmmc_cmd_done(host, host->cmd);
1053 if ((end_trans || (status & TC)) && host->mrq)
1054 omap_hsmmc_xfer_done(host, data);
1055 }
1056
1057 /*
1058 * MMC controller IRQ handler
1059 */
1060 static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id)
1061 {
1062 struct omap_hsmmc_host *host = dev_id;
1063 int status;
1064
1065 status = OMAP_HSMMC_READ(host->base, STAT);
1066 do {
1067 omap_hsmmc_do_irq(host, status);
1068 /* Flush posted write */
1069 status = OMAP_HSMMC_READ(host->base, STAT);
1070 } while (status & INT_EN_MASK);
1071
1072 return IRQ_HANDLED;
1073 }
1074
1075 static void set_sd_bus_power(struct omap_hsmmc_host *host)
1076 {
1077 unsigned long i;
1078
1079 OMAP_HSMMC_WRITE(host->base, HCTL,
1080 OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
1081 for (i = 0; i < loops_per_jiffy; i++) {
1082 if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP)
1083 break;
1084 cpu_relax();
1085 }
1086 }
1087
1088 /*
1089 * Switch MMC interface voltage ... only relevant for MMC1.
1090 *
1091 * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver.
1092 * The MMC2 transceiver controls are used instead of DAT4..DAT7.
1093 * Some chips, like eMMC ones, use internal transceivers.
1094 */
1095 static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd)
1096 {
1097 u32 reg_val = 0;
1098 int ret;
1099
1100 /* Disable the clocks */
1101 pm_runtime_put_sync(host->dev);
1102 if (host->dbclk)
1103 clk_disable(host->dbclk);
1104
1105 /* Turn the power off */
1106 ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
1107
1108 /* Turn the power ON with given VDD 1.8 or 3.0v */
1109 if (!ret)
1110 ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1,
1111 vdd);
1112 pm_runtime_get_sync(host->dev);
1113 if (host->dbclk)
1114 clk_enable(host->dbclk);
1115
1116 if (ret != 0)
1117 goto err;
1118
1119 OMAP_HSMMC_WRITE(host->base, HCTL,
1120 OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR);
1121 reg_val = OMAP_HSMMC_READ(host->base, HCTL);
1122
1123 /*
1124 * If a MMC dual voltage card is detected, the set_ios fn calls
1125 * this fn with VDD bit set for 1.8V. Upon card removal from the
1126 * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF.
1127 *
1128 * Cope with a bit of slop in the range ... per data sheets:
1129 * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max,
1130 * but recommended values are 1.71V to 1.89V
1131 * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max,
1132 * but recommended values are 2.7V to 3.3V
1133 *
1134 * Board setup code shouldn't permit anything very out-of-range.
1135 * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the
1136 * middle range) but VSIM can't power DAT4..DAT7 at more than 3V.
1137 */
1138 if ((1 << vdd) <= MMC_VDD_23_24)
1139 reg_val |= SDVS18;
1140 else
1141 reg_val |= SDVS30;
1142
1143 OMAP_HSMMC_WRITE(host->base, HCTL, reg_val);
1144 set_sd_bus_power(host);
1145
1146 return 0;
1147 err:
1148 dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n");
1149 return ret;
1150 }
1151
1152 /* Protect the card while the cover is open */
1153 static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host)
1154 {
1155 if (!mmc_slot(host).get_cover_state)
1156 return;
1157
1158 host->reqs_blocked = 0;
1159 if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) {
1160 if (host->protect_card) {
1161 dev_info(host->dev, "%s: cover is closed, "
1162 "card is now accessible\n",
1163 mmc_hostname(host->mmc));
1164 host->protect_card = 0;
1165 }
1166 } else {
1167 if (!host->protect_card) {
1168 dev_info(host->dev, "%s: cover is open, "
1169 "card is now inaccessible\n",
1170 mmc_hostname(host->mmc));
1171 host->protect_card = 1;
1172 }
1173 }
1174 }
1175
1176 /*
1177 * irq handler to notify the core about card insertion/removal
1178 */
1179 static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
1180 {
1181 struct omap_hsmmc_host *host = dev_id;
1182 struct omap_mmc_slot_data *slot = &mmc_slot(host);
1183 int carddetect;
1184
1185 if (host->suspended)
1186 return IRQ_HANDLED;
1187
1188 sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
1189
1190 if (slot->card_detect)
1191 carddetect = slot->card_detect(host->dev, host->slot_id);
1192 else {
1193 omap_hsmmc_protect_card(host);
1194 carddetect = -ENOSYS;
1195 }
1196
1197 if (carddetect)
1198 mmc_detect_change(host->mmc, (HZ * 200) / 1000);
1199 else
1200 mmc_detect_change(host->mmc, (HZ * 50) / 1000);
1201 return IRQ_HANDLED;
1202 }
1203
1204 static void omap_hsmmc_dma_callback(void *param)
1205 {
1206 struct omap_hsmmc_host *host = param;
1207 struct dma_chan *chan;
1208 struct mmc_data *data;
1209 int req_in_progress;
1210
1211 spin_lock_irq(&host->irq_lock);
1212 if (host->dma_ch < 0) {
1213 spin_unlock_irq(&host->irq_lock);
1214 return;
1215 }
1216
1217 data = host->mrq->data;
1218 chan = omap_hsmmc_get_dma_chan(host, data);
1219 if (!data->host_cookie)
1220 dma_unmap_sg(chan->device->dev,
1221 data->sg, data->sg_len,
1222 omap_hsmmc_get_dma_dir(host, data));
1223
1224 req_in_progress = host->req_in_progress;
1225 host->dma_ch = -1;
1226 spin_unlock_irq(&host->irq_lock);
1227
1228 /* If DMA has finished after TC, complete the request */
1229 if (!req_in_progress) {
1230 struct mmc_request *mrq = host->mrq;
1231
1232 host->mrq = NULL;
1233 mmc_request_done(host->mmc, mrq);
1234 }
1235 }
1236
1237 static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
1238 struct mmc_data *data,
1239 struct omap_hsmmc_next *next,
1240 struct dma_chan *chan)
1241 {
1242 int dma_len;
1243
1244 if (!next && data->host_cookie &&
1245 data->host_cookie != host->next_data.cookie) {
1246 dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d"
1247 " host->next_data.cookie %d\n",
1248 __func__, data->host_cookie, host->next_data.cookie);
1249 data->host_cookie = 0;
1250 }
1251
1252 /* Check if next job is already prepared */
1253 if (next ||
1254 (!next && data->host_cookie != host->next_data.cookie)) {
1255 dma_len = dma_map_sg(chan->device->dev, data->sg, data->sg_len,
1256 omap_hsmmc_get_dma_dir(host, data));
1257
1258 } else {
1259 dma_len = host->next_data.dma_len;
1260 host->next_data.dma_len = 0;
1261 }
1262
1263
1264 if (dma_len == 0)
1265 return -EINVAL;
1266
1267 if (next) {
1268 next->dma_len = dma_len;
1269 data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie;
1270 } else
1271 host->dma_len = dma_len;
1272
1273 return 0;
1274 }
1275
1276 /*
1277 * Routine to configure and start DMA for the MMC card
1278 */
1279 static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
1280 struct mmc_request *req)
1281 {
1282 struct dma_slave_config cfg;
1283 struct dma_async_tx_descriptor *tx;
1284 int ret = 0, i;
1285 struct mmc_data *data = req->data;
1286 struct dma_chan *chan;
1287
1288 /* Sanity check: all the SG entries must be aligned by block size. */
1289 for (i = 0; i < data->sg_len; i++) {
1290 struct scatterlist *sgl;
1291
1292 sgl = data->sg + i;
1293 if (sgl->length % data->blksz)
1294 return -EINVAL;
1295 }
1296 if ((data->blksz % 4) != 0)
1297 /* REVISIT: The MMC buffer increments only when MSB is written.
1298 * Return error for blksz which is non multiple of four.
1299 */
1300 return -EINVAL;
1301
1302 BUG_ON(host->dma_ch != -1);
1303
1304 chan = omap_hsmmc_get_dma_chan(host, data);
1305
1306 cfg.src_addr = host->mapbase + OMAP_HSMMC_DATA;
1307 cfg.dst_addr = host->mapbase + OMAP_HSMMC_DATA;
1308 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1309 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1310 cfg.src_maxburst = data->blksz / 4;
1311 cfg.dst_maxburst = data->blksz / 4;
1312
1313 ret = dmaengine_slave_config(chan, &cfg);
1314 if (ret)
1315 return ret;
1316
1317 ret = omap_hsmmc_pre_dma_transfer(host, data, NULL, chan);
1318 if (ret)
1319 return ret;
1320
1321 tx = dmaengine_prep_slave_sg(chan, data->sg, data->sg_len,
1322 data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
1323 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
1324 if (!tx) {
1325 dev_err(mmc_dev(host->mmc), "prep_slave_sg() failed\n");
1326 /* FIXME: cleanup */
1327 return -1;
1328 }
1329
1330 tx->callback = omap_hsmmc_dma_callback;
1331 tx->callback_param = host;
1332
1333 /* Does not fail */
1334 dmaengine_submit(tx);
1335
1336 host->dma_ch = 1;
1337
1338 dma_async_issue_pending(chan);
1339
1340 return 0;
1341 }
1342
1343 static void set_data_timeout(struct omap_hsmmc_host *host,
1344 unsigned int timeout_ns,
1345 unsigned int timeout_clks)
1346 {
1347 unsigned int timeout, cycle_ns;
1348 uint32_t reg, clkd, dto = 0;
1349
1350 reg = OMAP_HSMMC_READ(host->base, SYSCTL);
1351 clkd = (reg & CLKD_MASK) >> CLKD_SHIFT;
1352 if (clkd == 0)
1353 clkd = 1;
1354
1355 cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd);
1356 timeout = timeout_ns / cycle_ns;
1357 timeout += timeout_clks;
1358 if (timeout) {
1359 while ((timeout & 0x80000000) == 0) {
1360 dto += 1;
1361 timeout <<= 1;
1362 }
1363 dto = 31 - dto;
1364 timeout <<= 1;
1365 if (timeout && dto)
1366 dto += 1;
1367 if (dto >= 13)
1368 dto -= 13;
1369 else
1370 dto = 0;
1371 if (dto > 14)
1372 dto = 14;
1373 }
1374
1375 reg &= ~DTO_MASK;
1376 reg |= dto << DTO_SHIFT;
1377 OMAP_HSMMC_WRITE(host->base, SYSCTL, reg);
1378 }
1379
1380 /*
1381 * Configure block length for MMC/SD cards and initiate the transfer.
1382 */
1383 static int
1384 omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req)
1385 {
1386 int ret;
1387 host->data = req->data;
1388
1389 if (req->data == NULL) {
1390 OMAP_HSMMC_WRITE(host->base, BLK, 0);
1391 /*
1392 * Set an arbitrary 100ms data timeout for commands with
1393 * busy signal.
1394 */
1395 if (req->cmd->flags & MMC_RSP_BUSY)
1396 set_data_timeout(host, 100000000U, 0);
1397 return 0;
1398 }
1399
1400 OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz)
1401 | (req->data->blocks << 16));
1402 set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks);
1403
1404 if (host->use_dma) {
1405 ret = omap_hsmmc_start_dma_transfer(host, req);
1406 if (ret != 0) {
1407 dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n");
1408 return ret;
1409 }
1410 }
1411 return 0;
1412 }
1413
1414 static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1415 int err)
1416 {
1417 struct omap_hsmmc_host *host = mmc_priv(mmc);
1418 struct mmc_data *data = mrq->data;
1419
1420 if (host->use_dma && data->host_cookie) {
1421 struct dma_chan *c = omap_hsmmc_get_dma_chan(host, data);
1422
1423 dma_unmap_sg(c->device->dev, data->sg, data->sg_len,
1424 omap_hsmmc_get_dma_dir(host, data));
1425 data->host_cookie = 0;
1426 }
1427 }
1428
1429 static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
1430 bool is_first_req)
1431 {
1432 struct omap_hsmmc_host *host = mmc_priv(mmc);
1433
1434 if (mrq->data->host_cookie) {
1435 mrq->data->host_cookie = 0;
1436 return ;
1437 }
1438
1439 if (host->use_dma) {
1440 struct dma_chan *c = omap_hsmmc_get_dma_chan(host, mrq->data);
1441
1442 if (omap_hsmmc_pre_dma_transfer(host, mrq->data,
1443 &host->next_data, c))
1444 mrq->data->host_cookie = 0;
1445 }
1446 }
1447
1448 /*
1449 * Request function. for read/write operation
1450 */
1451 static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
1452 {
1453 struct omap_hsmmc_host *host = mmc_priv(mmc);
1454 int err;
1455
1456 BUG_ON(host->req_in_progress);
1457 BUG_ON(host->dma_ch != -1);
1458 if (host->protect_card) {
1459 if (host->reqs_blocked < 3) {
1460 /*
1461 * Ensure the controller is left in a consistent
1462 * state by resetting the command and data state
1463 * machines.
1464 */
1465 omap_hsmmc_reset_controller_fsm(host, SRD);
1466 omap_hsmmc_reset_controller_fsm(host, SRC);
1467 host->reqs_blocked += 1;
1468 }
1469 req->cmd->error = -EBADF;
1470 if (req->data)
1471 req->data->error = -EBADF;
1472 req->cmd->retries = 0;
1473 mmc_request_done(mmc, req);
1474 return;
1475 } else if (host->reqs_blocked)
1476 host->reqs_blocked = 0;
1477 WARN_ON(host->mrq != NULL);
1478 host->mrq = req;
1479 err = omap_hsmmc_prepare_data(host, req);
1480 if (err) {
1481 req->cmd->error = err;
1482 if (req->data)
1483 req->data->error = err;
1484 host->mrq = NULL;
1485 mmc_request_done(mmc, req);
1486 return;
1487 }
1488
1489 omap_hsmmc_start_command(host, req->cmd, req->data);
1490 }
1491
1492 /* Routine to configure clock values. Exposed API to core */
1493 static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1494 {
1495 struct omap_hsmmc_host *host = mmc_priv(mmc);
1496 int do_send_init_stream = 0;
1497
1498 pm_runtime_get_sync(host->dev);
1499
1500 if (ios->power_mode != host->power_mode) {
1501 switch (ios->power_mode) {
1502 case MMC_POWER_OFF:
1503 mmc_slot(host).set_power(host->dev, host->slot_id,
1504 0, 0);
1505 host->vdd = 0;
1506 break;
1507 case MMC_POWER_UP:
1508 mmc_slot(host).set_power(host->dev, host->slot_id,
1509 1, ios->vdd);
1510 host->vdd = ios->vdd;
1511 break;
1512 case MMC_POWER_ON:
1513 do_send_init_stream = 1;
1514 break;
1515 }
1516 host->power_mode = ios->power_mode;
1517 }
1518
1519 /* FIXME: set registers based only on changes to ios */
1520
1521 omap_hsmmc_set_bus_width(host);
1522
1523 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
1524 /* Only MMC1 can interface at 3V without some flavor
1525 * of external transceiver; but they all handle 1.8V.
1526 */
1527 if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) &&
1528 (ios->vdd == DUAL_VOLT_OCR_BIT) &&
1529 /*
1530 * With pbias cell programming missing, this
1531 * can't be allowed when booting with device
1532 * tree.
1533 */
1534 !host->dev->of_node) {
1535 /*
1536 * The mmc_select_voltage fn of the core does
1537 * not seem to set the power_mode to
1538 * MMC_POWER_UP upon recalculating the voltage.
1539 * vdd 1.8v.
1540 */
1541 if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0)
1542 dev_dbg(mmc_dev(host->mmc),
1543 "Switch operation failed\n");
1544 }
1545 }
1546
1547 omap_hsmmc_set_clock(host);
1548
1549 if (do_send_init_stream)
1550 send_init_stream(host);
1551
1552 omap_hsmmc_set_bus_mode(host);
1553
1554 pm_runtime_put_autosuspend(host->dev);
1555 }
1556
1557 static int omap_hsmmc_get_cd(struct mmc_host *mmc)
1558 {
1559 struct omap_hsmmc_host *host = mmc_priv(mmc);
1560
1561 if (!mmc_slot(host).card_detect)
1562 return -ENOSYS;
1563 return mmc_slot(host).card_detect(host->dev, host->slot_id);
1564 }
1565
1566 static int omap_hsmmc_get_ro(struct mmc_host *mmc)
1567 {
1568 struct omap_hsmmc_host *host = mmc_priv(mmc);
1569
1570 if (!mmc_slot(host).get_ro)
1571 return -ENOSYS;
1572 return mmc_slot(host).get_ro(host->dev, 0);
1573 }
1574
1575 static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card)
1576 {
1577 struct omap_hsmmc_host *host = mmc_priv(mmc);
1578
1579 if (mmc_slot(host).init_card)
1580 mmc_slot(host).init_card(card);
1581 }
1582
1583 static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
1584 {
1585 u32 hctl, capa, value;
1586
1587 /* Only MMC1 supports 3.0V */
1588 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
1589 hctl = SDVS30;
1590 capa = VS30 | VS18;
1591 } else {
1592 hctl = SDVS18;
1593 capa = VS18;
1594 }
1595
1596 value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK;
1597 OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl);
1598
1599 value = OMAP_HSMMC_READ(host->base, CAPA);
1600 OMAP_HSMMC_WRITE(host->base, CAPA, value | capa);
1601
1602 /* Set the controller to AUTO IDLE mode */
1603 value = OMAP_HSMMC_READ(host->base, SYSCONFIG);
1604 OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE);
1605
1606 /* Set SD bus power bit */
1607 set_sd_bus_power(host);
1608 }
1609
1610 static int omap_hsmmc_enable_fclk(struct mmc_host *mmc)
1611 {
1612 struct omap_hsmmc_host *host = mmc_priv(mmc);
1613
1614 pm_runtime_get_sync(host->dev);
1615
1616 return 0;
1617 }
1618
1619 static int omap_hsmmc_disable_fclk(struct mmc_host *mmc)
1620 {
1621 struct omap_hsmmc_host *host = mmc_priv(mmc);
1622
1623 pm_runtime_mark_last_busy(host->dev);
1624 pm_runtime_put_autosuspend(host->dev);
1625
1626 return 0;
1627 }
1628
1629 static const struct mmc_host_ops omap_hsmmc_ops = {
1630 .enable = omap_hsmmc_enable_fclk,
1631 .disable = omap_hsmmc_disable_fclk,
1632 .post_req = omap_hsmmc_post_req,
1633 .pre_req = omap_hsmmc_pre_req,
1634 .request = omap_hsmmc_request,
1635 .set_ios = omap_hsmmc_set_ios,
1636 .get_cd = omap_hsmmc_get_cd,
1637 .get_ro = omap_hsmmc_get_ro,
1638 .init_card = omap_hsmmc_init_card,
1639 /* NYET -- enable_sdio_irq */
1640 };
1641
1642 #ifdef CONFIG_DEBUG_FS
1643
1644 static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
1645 {
1646 struct mmc_host *mmc = s->private;
1647 struct omap_hsmmc_host *host = mmc_priv(mmc);
1648 int context_loss = 0;
1649
1650 if (host->pdata->get_context_loss_count)
1651 context_loss = host->pdata->get_context_loss_count(host->dev);
1652
1653 seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n",
1654 mmc->index, host->context_loss, context_loss);
1655
1656 if (host->suspended) {
1657 seq_printf(s, "host suspended, can't read registers\n");
1658 return 0;
1659 }
1660
1661 pm_runtime_get_sync(host->dev);
1662
1663 seq_printf(s, "SYSCONFIG:\t0x%08x\n",
1664 OMAP_HSMMC_READ(host->base, SYSCONFIG));
1665 seq_printf(s, "CON:\t\t0x%08x\n",
1666 OMAP_HSMMC_READ(host->base, CON));
1667 seq_printf(s, "HCTL:\t\t0x%08x\n",
1668 OMAP_HSMMC_READ(host->base, HCTL));
1669 seq_printf(s, "SYSCTL:\t\t0x%08x\n",
1670 OMAP_HSMMC_READ(host->base, SYSCTL));
1671 seq_printf(s, "IE:\t\t0x%08x\n",
1672 OMAP_HSMMC_READ(host->base, IE));
1673 seq_printf(s, "ISE:\t\t0x%08x\n",
1674 OMAP_HSMMC_READ(host->base, ISE));
1675 seq_printf(s, "CAPA:\t\t0x%08x\n",
1676 OMAP_HSMMC_READ(host->base, CAPA));
1677
1678 pm_runtime_mark_last_busy(host->dev);
1679 pm_runtime_put_autosuspend(host->dev);
1680
1681 return 0;
1682 }
1683
1684 static int omap_hsmmc_regs_open(struct inode *inode, struct file *file)
1685 {
1686 return single_open(file, omap_hsmmc_regs_show, inode->i_private);
1687 }
1688
1689 static const struct file_operations mmc_regs_fops = {
1690 .open = omap_hsmmc_regs_open,
1691 .read = seq_read,
1692 .llseek = seq_lseek,
1693 .release = single_release,
1694 };
1695
1696 static void omap_hsmmc_debugfs(struct mmc_host *mmc)
1697 {
1698 if (mmc->debugfs_root)
1699 debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root,
1700 mmc, &mmc_regs_fops);
1701 }
1702
1703 #else
1704
1705 static void omap_hsmmc_debugfs(struct mmc_host *mmc)
1706 {
1707 }
1708
1709 #endif
1710
1711 #ifdef CONFIG_OF
1712 static u16 omap4_reg_offset = 0x100;
1713
1714 static const struct of_device_id omap_mmc_of_match[] = {
1715 {
1716 .compatible = "ti,omap2-hsmmc",
1717 },
1718 {
1719 .compatible = "ti,omap3-hsmmc",
1720 },
1721 {
1722 .compatible = "ti,omap4-hsmmc",
1723 .data = &omap4_reg_offset,
1724 },
1725 {},
1726 };
1727 MODULE_DEVICE_TABLE(of, omap_mmc_of_match);
1728
1729 static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
1730 {
1731 struct omap_mmc_platform_data *pdata;
1732 struct device_node *np = dev->of_node;
1733 u32 bus_width;
1734
1735 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
1736 if (!pdata)
1737 return NULL; /* out of memory */
1738
1739 if (of_find_property(np, "ti,dual-volt", NULL))
1740 pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
1741
1742 /* This driver only supports 1 slot */
1743 pdata->nr_slots = 1;
1744 pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0);
1745 pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
1746
1747 if (of_find_property(np, "ti,non-removable", NULL)) {
1748 pdata->slots[0].nonremovable = true;
1749 pdata->slots[0].no_regulator_off_init = true;
1750 }
1751 of_property_read_u32(np, "bus-width", &bus_width);
1752 if (bus_width == 4)
1753 pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA;
1754 else if (bus_width == 8)
1755 pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA;
1756
1757 if (of_find_property(np, "ti,needs-special-reset", NULL))
1758 pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
1759
1760 return pdata;
1761 }
1762 #else
1763 static inline struct omap_mmc_platform_data
1764 *of_get_hsmmc_pdata(struct device *dev)
1765 {
1766 return NULL;
1767 }
1768 #endif
1769
1770 static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
1771 {
1772 struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
1773 struct mmc_host *mmc;
1774 struct omap_hsmmc_host *host = NULL;
1775 struct resource *res;
1776 int ret, irq;
1777 const struct of_device_id *match;
1778 dma_cap_mask_t mask;
1779 unsigned tx_req, rx_req;
1780
1781 match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev);
1782 if (match) {
1783 pdata = of_get_hsmmc_pdata(&pdev->dev);
1784 if (match->data) {
1785 u16 *offsetp = match->data;
1786 pdata->reg_offset = *offsetp;
1787 }
1788 }
1789
1790 if (pdata == NULL) {
1791 dev_err(&pdev->dev, "Platform Data is missing\n");
1792 return -ENXIO;
1793 }
1794
1795 if (pdata->nr_slots == 0) {
1796 dev_err(&pdev->dev, "No Slots\n");
1797 return -ENXIO;
1798 }
1799
1800 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1801 irq = platform_get_irq(pdev, 0);
1802 if (res == NULL || irq < 0)
1803 return -ENXIO;
1804
1805 res = request_mem_region(res->start, resource_size(res), pdev->name);
1806 if (res == NULL)
1807 return -EBUSY;
1808
1809 ret = omap_hsmmc_gpio_init(pdata);
1810 if (ret)
1811 goto err;
1812
1813 mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev);
1814 if (!mmc) {
1815 ret = -ENOMEM;
1816 goto err_alloc;
1817 }
1818
1819 host = mmc_priv(mmc);
1820 host->mmc = mmc;
1821 host->pdata = pdata;
1822 host->dev = &pdev->dev;
1823 host->use_dma = 1;
1824 host->dma_ch = -1;
1825 host->irq = irq;
1826 host->slot_id = 0;
1827 host->mapbase = res->start + pdata->reg_offset;
1828 host->base = ioremap(host->mapbase, SZ_4K);
1829 host->power_mode = MMC_POWER_OFF;
1830 host->next_data.cookie = 1;
1831
1832 platform_set_drvdata(pdev, host);
1833
1834 mmc->ops = &omap_hsmmc_ops;
1835
1836 /*
1837 * If regulator_disable can only put vcc_aux to sleep then there is
1838 * no off state.
1839 */
1840 if (mmc_slot(host).vcc_aux_disable_is_sleep)
1841 mmc_slot(host).no_off = 1;
1842
1843 mmc->f_min = OMAP_MMC_MIN_CLOCK;
1844
1845 if (pdata->max_freq > 0)
1846 mmc->f_max = pdata->max_freq;
1847 else
1848 mmc->f_max = OMAP_MMC_MAX_CLOCK;
1849
1850 spin_lock_init(&host->irq_lock);
1851
1852 host->fclk = clk_get(&pdev->dev, "fck");
1853 if (IS_ERR(host->fclk)) {
1854 ret = PTR_ERR(host->fclk);
1855 host->fclk = NULL;
1856 goto err1;
1857 }
1858
1859 if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) {
1860 dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n");
1861 mmc->caps2 |= MMC_CAP2_NO_MULTI_READ;
1862 }
1863
1864 pm_runtime_enable(host->dev);
1865 pm_runtime_get_sync(host->dev);
1866 pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY);
1867 pm_runtime_use_autosuspend(host->dev);
1868
1869 omap_hsmmc_context_save(host);
1870
1871 host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck");
1872 /*
1873 * MMC can still work without debounce clock.
1874 */
1875 if (IS_ERR(host->dbclk)) {
1876 dev_warn(mmc_dev(host->mmc), "Failed to get debounce clk\n");
1877 host->dbclk = NULL;
1878 } else if (clk_enable(host->dbclk) != 0) {
1879 dev_warn(mmc_dev(host->mmc), "Failed to enable debounce clk\n");
1880 clk_put(host->dbclk);
1881 host->dbclk = NULL;
1882 }
1883
1884 /* Since we do only SG emulation, we can have as many segs
1885 * as we want. */
1886 mmc->max_segs = 1024;
1887
1888 mmc->max_blk_size = 512; /* Block Length at max can be 1024 */
1889 mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */
1890 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1891 mmc->max_seg_size = mmc->max_req_size;
1892
1893 mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED |
1894 MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE;
1895
1896 mmc->caps |= mmc_slot(host).caps;
1897 if (mmc->caps & MMC_CAP_8_BIT_DATA)
1898 mmc->caps |= MMC_CAP_4_BIT_DATA;
1899
1900 if (mmc_slot(host).nonremovable)
1901 mmc->caps |= MMC_CAP_NONREMOVABLE;
1902
1903 mmc->pm_caps = mmc_slot(host).pm_caps;
1904
1905 omap_hsmmc_conf_bus_power(host);
1906
1907 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
1908 if (!res) {
1909 dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
1910 goto err_irq;
1911 }
1912 tx_req = res->start;
1913
1914 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
1915 if (!res) {
1916 dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n");
1917 goto err_irq;
1918 }
1919 rx_req = res->start;
1920
1921 dma_cap_zero(mask);
1922 dma_cap_set(DMA_SLAVE, mask);
1923
1924 host->rx_chan = dma_request_channel(mask, omap_dma_filter_fn, &rx_req);
1925 if (!host->rx_chan) {
1926 dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
1927 goto err_irq;
1928 }
1929
1930 host->tx_chan = dma_request_channel(mask, omap_dma_filter_fn, &tx_req);
1931 if (!host->tx_chan) {
1932 dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
1933 goto err_irq;
1934 }
1935
1936 /* Request IRQ for MMC operations */
1937 ret = request_irq(host->irq, omap_hsmmc_irq, 0,
1938 mmc_hostname(mmc), host);
1939 if (ret) {
1940 dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n");
1941 goto err_irq;
1942 }
1943
1944 if (pdata->init != NULL) {
1945 if (pdata->init(&pdev->dev) != 0) {
1946 dev_dbg(mmc_dev(host->mmc),
1947 "Unable to configure MMC IRQs\n");
1948 goto err_irq_cd_init;
1949 }
1950 }
1951
1952 if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) {
1953 ret = omap_hsmmc_reg_get(host);
1954 if (ret)
1955 goto err_reg;
1956 host->use_reg = 1;
1957 }
1958
1959 mmc->ocr_avail = mmc_slot(host).ocr_mask;
1960
1961 /* Request IRQ for card detect */
1962 if ((mmc_slot(host).card_detect_irq)) {
1963 ret = request_threaded_irq(mmc_slot(host).card_detect_irq,
1964 NULL,
1965 omap_hsmmc_detect,
1966 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
1967 mmc_hostname(mmc), host);
1968 if (ret) {
1969 dev_dbg(mmc_dev(host->mmc),
1970 "Unable to grab MMC CD IRQ\n");
1971 goto err_irq_cd;
1972 }
1973 pdata->suspend = omap_hsmmc_suspend_cdirq;
1974 pdata->resume = omap_hsmmc_resume_cdirq;
1975 }
1976
1977 omap_hsmmc_disable_irq(host);
1978
1979 omap_hsmmc_protect_card(host);
1980
1981 mmc_add_host(mmc);
1982
1983 if (mmc_slot(host).name != NULL) {
1984 ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name);
1985 if (ret < 0)
1986 goto err_slot_name;
1987 }
1988 if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) {
1989 ret = device_create_file(&mmc->class_dev,
1990 &dev_attr_cover_switch);
1991 if (ret < 0)
1992 goto err_slot_name;
1993 }
1994
1995 omap_hsmmc_debugfs(mmc);
1996 pm_runtime_mark_last_busy(host->dev);
1997 pm_runtime_put_autosuspend(host->dev);
1998
1999 return 0;
2000
2001 err_slot_name:
2002 mmc_remove_host(mmc);
2003 free_irq(mmc_slot(host).card_detect_irq, host);
2004 err_irq_cd:
2005 if (host->use_reg)
2006 omap_hsmmc_reg_put(host);
2007 err_reg:
2008 if (host->pdata->cleanup)
2009 host->pdata->cleanup(&pdev->dev);
2010 err_irq_cd_init:
2011 free_irq(host->irq, host);
2012 err_irq:
2013 if (host->tx_chan)
2014 dma_release_channel(host->tx_chan);
2015 if (host->rx_chan)
2016 dma_release_channel(host->rx_chan);
2017 pm_runtime_put_sync(host->dev);
2018 pm_runtime_disable(host->dev);
2019 clk_put(host->fclk);
2020 if (host->dbclk) {
2021 clk_disable(host->dbclk);
2022 clk_put(host->dbclk);
2023 }
2024 err1:
2025 iounmap(host->base);
2026 platform_set_drvdata(pdev, NULL);
2027 mmc_free_host(mmc);
2028 err_alloc:
2029 omap_hsmmc_gpio_free(pdata);
2030 err:
2031 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2032 if (res)
2033 release_mem_region(res->start, resource_size(res));
2034 return ret;
2035 }
2036
2037 static int __devexit omap_hsmmc_remove(struct platform_device *pdev)
2038 {
2039 struct omap_hsmmc_host *host = platform_get_drvdata(pdev);
2040 struct resource *res;
2041
2042 pm_runtime_get_sync(host->dev);
2043 mmc_remove_host(host->mmc);
2044 if (host->use_reg)
2045 omap_hsmmc_reg_put(host);
2046 if (host->pdata->cleanup)
2047 host->pdata->cleanup(&pdev->dev);
2048 free_irq(host->irq, host);
2049 if (mmc_slot(host).card_detect_irq)
2050 free_irq(mmc_slot(host).card_detect_irq, host);
2051
2052 if (host->tx_chan)
2053 dma_release_channel(host->tx_chan);
2054 if (host->rx_chan)
2055 dma_release_channel(host->rx_chan);
2056
2057 pm_runtime_put_sync(host->dev);
2058 pm_runtime_disable(host->dev);
2059 clk_put(host->fclk);
2060 if (host->dbclk) {
2061 clk_disable(host->dbclk);
2062 clk_put(host->dbclk);
2063 }
2064
2065 mmc_free_host(host->mmc);
2066 iounmap(host->base);
2067 omap_hsmmc_gpio_free(pdev->dev.platform_data);
2068
2069 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2070 if (res)
2071 release_mem_region(res->start, resource_size(res));
2072 platform_set_drvdata(pdev, NULL);
2073
2074 return 0;
2075 }
2076
2077 #ifdef CONFIG_PM
2078 static int omap_hsmmc_suspend(struct device *dev)
2079 {
2080 int ret = 0;
2081 struct omap_hsmmc_host *host = dev_get_drvdata(dev);
2082
2083 if (!host)
2084 return 0;
2085
2086 if (host && host->suspended)
2087 return 0;
2088
2089 pm_runtime_get_sync(host->dev);
2090 host->suspended = 1;
2091 if (host->pdata->suspend) {
2092 ret = host->pdata->suspend(dev, host->slot_id);
2093 if (ret) {
2094 dev_dbg(dev, "Unable to handle MMC board"
2095 " level suspend\n");
2096 host->suspended = 0;
2097 return ret;
2098 }
2099 }
2100 ret = mmc_suspend_host(host->mmc);
2101
2102 if (ret) {
2103 host->suspended = 0;
2104 if (host->pdata->resume) {
2105 ret = host->pdata->resume(dev, host->slot_id);
2106 if (ret)
2107 dev_dbg(dev, "Unmask interrupt failed\n");
2108 }
2109 goto err;
2110 }
2111
2112 if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) {
2113 omap_hsmmc_disable_irq(host);
2114 OMAP_HSMMC_WRITE(host->base, HCTL,
2115 OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
2116 }
2117
2118 if (host->dbclk)
2119 clk_disable(host->dbclk);
2120 err:
2121 pm_runtime_put_sync(host->dev);
2122 return ret;
2123 }
2124
2125 /* Routine to resume the MMC device */
2126 static int omap_hsmmc_resume(struct device *dev)
2127 {
2128 int ret = 0;
2129 struct omap_hsmmc_host *host = dev_get_drvdata(dev);
2130
2131 if (!host)
2132 return 0;
2133
2134 if (host && !host->suspended)
2135 return 0;
2136
2137 pm_runtime_get_sync(host->dev);
2138
2139 if (host->dbclk)
2140 clk_enable(host->dbclk);
2141
2142 if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER))
2143 omap_hsmmc_conf_bus_power(host);
2144
2145 if (host->pdata->resume) {
2146 ret = host->pdata->resume(dev, host->slot_id);
2147 if (ret)
2148 dev_dbg(dev, "Unmask interrupt failed\n");
2149 }
2150
2151 omap_hsmmc_protect_card(host);
2152
2153 /* Notify the core to resume the host */
2154 ret = mmc_resume_host(host->mmc);
2155 if (ret == 0)
2156 host->suspended = 0;
2157
2158 pm_runtime_mark_last_busy(host->dev);
2159 pm_runtime_put_autosuspend(host->dev);
2160
2161 return ret;
2162
2163 }
2164
2165 #else
2166 #define omap_hsmmc_suspend NULL
2167 #define omap_hsmmc_resume NULL
2168 #endif
2169
2170 static int omap_hsmmc_runtime_suspend(struct device *dev)
2171 {
2172 struct omap_hsmmc_host *host;
2173
2174 host = platform_get_drvdata(to_platform_device(dev));
2175 omap_hsmmc_context_save(host);
2176 dev_dbg(dev, "disabled\n");
2177
2178 return 0;
2179 }
2180
2181 static int omap_hsmmc_runtime_resume(struct device *dev)
2182 {
2183 struct omap_hsmmc_host *host;
2184
2185 host = platform_get_drvdata(to_platform_device(dev));
2186 omap_hsmmc_context_restore(host);
2187 dev_dbg(dev, "enabled\n");
2188
2189 return 0;
2190 }
2191
2192 static struct dev_pm_ops omap_hsmmc_dev_pm_ops = {
2193 .suspend = omap_hsmmc_suspend,
2194 .resume = omap_hsmmc_resume,
2195 .runtime_suspend = omap_hsmmc_runtime_suspend,
2196 .runtime_resume = omap_hsmmc_runtime_resume,
2197 };
2198
2199 static struct platform_driver omap_hsmmc_driver = {
2200 .probe = omap_hsmmc_probe,
2201 .remove = __devexit_p(omap_hsmmc_remove),
2202 .driver = {
2203 .name = DRIVER_NAME,
2204 .owner = THIS_MODULE,
2205 .pm = &omap_hsmmc_dev_pm_ops,
2206 .of_match_table = of_match_ptr(omap_mmc_of_match),
2207 },
2208 };
2209
2210 module_platform_driver(omap_hsmmc_driver);
2211 MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver");
2212 MODULE_LICENSE("GPL");
2213 MODULE_ALIAS("platform:" DRIVER_NAME);
2214 MODULE_AUTHOR("Texas Instruments Inc");
kernel source for telekom puls (alcatel/mediatek)