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Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
[deliverable/linux.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/seq_file.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/platform_device.h>
27 #include <linux/timer.h>
28 #include <linux/clk.h>
29 #include <linux/of.h>
30 #include <linux/of_gpio.h>
31 #include <linux/of_device.h>
32 #include <linux/mmc/host.h>
33 #include <linux/mmc/core.h>
34 #include <linux/mmc/mmc.h>
35 #include <linux/io.h>
36 #include <linux/semaphore.h>
37 #include <linux/gpio.h>
38 #include <linux/regulator/consumer.h>
39 #include <linux/pm_runtime.h>
40 #include <plat/dma.h>
41 #include <mach/hardware.h>
42 #include <plat/board.h>
43 #include <plat/mmc.h>
44 #include <plat/cpu.h>
45
46 /* OMAP HSMMC Host Controller Registers */
47 #define OMAP_HSMMC_SYSCONFIG 0x0010
48 #define OMAP_HSMMC_SYSSTATUS 0x0014
49 #define OMAP_HSMMC_CON 0x002C
50 #define OMAP_HSMMC_BLK 0x0104
51 #define OMAP_HSMMC_ARG 0x0108
52 #define OMAP_HSMMC_CMD 0x010C
53 #define OMAP_HSMMC_RSP10 0x0110
54 #define OMAP_HSMMC_RSP32 0x0114
55 #define OMAP_HSMMC_RSP54 0x0118
56 #define OMAP_HSMMC_RSP76 0x011C
57 #define OMAP_HSMMC_DATA 0x0120
58 #define OMAP_HSMMC_HCTL 0x0128
59 #define OMAP_HSMMC_SYSCTL 0x012C
60 #define OMAP_HSMMC_STAT 0x0130
61 #define OMAP_HSMMC_IE 0x0134
62 #define OMAP_HSMMC_ISE 0x0138
63 #define OMAP_HSMMC_CAPA 0x0140
64
65 #define VS18 (1 << 26)
66 #define VS30 (1 << 25)
67 #define SDVS18 (0x5 << 9)
68 #define SDVS30 (0x6 << 9)
69 #define SDVS33 (0x7 << 9)
70 #define SDVS_MASK 0x00000E00
71 #define SDVSCLR 0xFFFFF1FF
72 #define SDVSDET 0x00000400
73 #define AUTOIDLE 0x1
74 #define SDBP (1 << 8)
75 #define DTO 0xe
76 #define ICE 0x1
77 #define ICS 0x2
78 #define CEN (1 << 2)
79 #define CLKD_MASK 0x0000FFC0
80 #define CLKD_SHIFT 6
81 #define DTO_MASK 0x000F0000
82 #define DTO_SHIFT 16
83 #define INT_EN_MASK 0x307F0033
84 #define BWR_ENABLE (1 << 4)
85 #define BRR_ENABLE (1 << 5)
86 #define DTO_ENABLE (1 << 20)
87 #define INIT_STREAM (1 << 1)
88 #define DP_SELECT (1 << 21)
89 #define DDIR (1 << 4)
90 #define DMA_EN 0x1
91 #define MSBS (1 << 5)
92 #define BCE (1 << 1)
93 #define FOUR_BIT (1 << 1)
94 #define DW8 (1 << 5)
95 #define CC 0x1
96 #define TC 0x02
97 #define OD 0x1
98 #define ERR (1 << 15)
99 #define CMD_TIMEOUT (1 << 16)
100 #define DATA_TIMEOUT (1 << 20)
101 #define CMD_CRC (1 << 17)
102 #define DATA_CRC (1 << 21)
103 #define CARD_ERR (1 << 28)
104 #define STAT_CLEAR 0xFFFFFFFF
105 #define INIT_STREAM_CMD 0x00000000
106 #define DUAL_VOLT_OCR_BIT 7
107 #define SRC (1 << 25)
108 #define SRD (1 << 26)
109 #define SOFTRESET (1 << 1)
110 #define RESETDONE (1 << 0)
111
112 #define MMC_AUTOSUSPEND_DELAY 100
113 #define MMC_TIMEOUT_MS 20
114 #define OMAP_MMC_MIN_CLOCK 400000
115 #define OMAP_MMC_MAX_CLOCK 52000000
116 #define DRIVER_NAME "omap_hsmmc"
117
118 /*
119 * One controller can have multiple slots, like on some omap boards using
120 * omap.c controller driver. Luckily this is not currently done on any known
121 * omap_hsmmc.c device.
122 */
123 #define mmc_slot(host) (host->pdata->slots[host->slot_id])
124
125 /*
126 * MMC Host controller read/write API's
127 */
128 #define OMAP_HSMMC_READ(base, reg) \
129 __raw_readl((base) + OMAP_HSMMC_##reg)
130
131 #define OMAP_HSMMC_WRITE(base, reg, val) \
132 __raw_writel((val), (base) + OMAP_HSMMC_##reg)
133
134 struct omap_hsmmc_next {
135 unsigned int dma_len;
136 s32 cookie;
137 };
138
139 struct omap_hsmmc_host {
140 struct device *dev;
141 struct mmc_host *mmc;
142 struct mmc_request *mrq;
143 struct mmc_command *cmd;
144 struct mmc_data *data;
145 struct clk *fclk;
146 struct clk *dbclk;
147 /*
148 * vcc == configured supply
149 * vcc_aux == optional
150 * - MMC1, supply for DAT4..DAT7
151 * - MMC2/MMC2, external level shifter voltage supply, for
152 * chip (SDIO, eMMC, etc) or transceiver (MMC2 only)
153 */
154 struct regulator *vcc;
155 struct regulator *vcc_aux;
156 void __iomem *base;
157 resource_size_t mapbase;
158 spinlock_t irq_lock; /* Prevent races with irq handler */
159 unsigned int dma_len;
160 unsigned int dma_sg_idx;
161 unsigned char bus_mode;
162 unsigned char power_mode;
163 u32 *buffer;
164 u32 bytesleft;
165 int suspended;
166 int irq;
167 int use_dma, dma_ch;
168 int dma_line_tx, dma_line_rx;
169 int slot_id;
170 int got_dbclk;
171 int response_busy;
172 int context_loss;
173 int vdd;
174 int protect_card;
175 int reqs_blocked;
176 int use_reg;
177 int req_in_progress;
178 struct omap_hsmmc_next next_data;
179
180 struct omap_mmc_platform_data *pdata;
181 };
182
183 static int omap_hsmmc_card_detect(struct device *dev, int slot)
184 {
185 struct omap_mmc_platform_data *mmc = dev->platform_data;
186
187 /* NOTE: assumes card detect signal is active-low */
188 return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
189 }
190
191 static int omap_hsmmc_get_wp(struct device *dev, int slot)
192 {
193 struct omap_mmc_platform_data *mmc = dev->platform_data;
194
195 /* NOTE: assumes write protect signal is active-high */
196 return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
197 }
198
199 static int omap_hsmmc_get_cover_state(struct device *dev, int slot)
200 {
201 struct omap_mmc_platform_data *mmc = dev->platform_data;
202
203 /* NOTE: assumes card detect signal is active-low */
204 return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
205 }
206
207 #ifdef CONFIG_PM
208
209 static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot)
210 {
211 struct omap_mmc_platform_data *mmc = dev->platform_data;
212
213 disable_irq(mmc->slots[0].card_detect_irq);
214 return 0;
215 }
216
217 static int omap_hsmmc_resume_cdirq(struct device *dev, int slot)
218 {
219 struct omap_mmc_platform_data *mmc = dev->platform_data;
220
221 enable_irq(mmc->slots[0].card_detect_irq);
222 return 0;
223 }
224
225 #else
226
227 #define omap_hsmmc_suspend_cdirq NULL
228 #define omap_hsmmc_resume_cdirq NULL
229
230 #endif
231
232 #ifdef CONFIG_REGULATOR
233
234 static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on,
235 int vdd)
236 {
237 struct omap_hsmmc_host *host =
238 platform_get_drvdata(to_platform_device(dev));
239 int ret = 0;
240
241 /*
242 * If we don't see a Vcc regulator, assume it's a fixed
243 * voltage always-on regulator.
244 */
245 if (!host->vcc)
246 return 0;
247 /*
248 * With DT, never turn OFF the regulator. This is because
249 * the pbias cell programming support is still missing when
250 * booting with Device tree
251 */
252 if (dev->of_node && !vdd)
253 return 0;
254
255 if (mmc_slot(host).before_set_reg)
256 mmc_slot(host).before_set_reg(dev, slot, power_on, vdd);
257
258 /*
259 * Assume Vcc regulator is used only to power the card ... OMAP
260 * VDDS is used to power the pins, optionally with a transceiver to
261 * support cards using voltages other than VDDS (1.8V nominal). When a
262 * transceiver is used, DAT3..7 are muxed as transceiver control pins.
263 *
264 * In some cases this regulator won't support enable/disable;
265 * e.g. it's a fixed rail for a WLAN chip.
266 *
267 * In other cases vcc_aux switches interface power. Example, for
268 * eMMC cards it represents VccQ. Sometimes transceivers or SDIO
269 * chips/cards need an interface voltage rail too.
270 */
271 if (power_on) {
272 ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd);
273 /* Enable interface voltage rail, if needed */
274 if (ret == 0 && host->vcc_aux) {
275 ret = regulator_enable(host->vcc_aux);
276 if (ret < 0)
277 ret = mmc_regulator_set_ocr(host->mmc,
278 host->vcc, 0);
279 }
280 } else {
281 /* Shut down the rail */
282 if (host->vcc_aux)
283 ret = regulator_disable(host->vcc_aux);
284 if (!ret) {
285 /* Then proceed to shut down the local regulator */
286 ret = mmc_regulator_set_ocr(host->mmc,
287 host->vcc, 0);
288 }
289 }
290
291 if (mmc_slot(host).after_set_reg)
292 mmc_slot(host).after_set_reg(dev, slot, power_on, vdd);
293
294 return ret;
295 }
296
297 static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
298 {
299 struct regulator *reg;
300 int ocr_value = 0;
301
302 mmc_slot(host).set_power = omap_hsmmc_set_power;
303
304 reg = regulator_get(host->dev, "vmmc");
305 if (IS_ERR(reg)) {
306 dev_dbg(host->dev, "vmmc regulator missing\n");
307 } else {
308 host->vcc = reg;
309 ocr_value = mmc_regulator_get_ocrmask(reg);
310 if (!mmc_slot(host).ocr_mask) {
311 mmc_slot(host).ocr_mask = ocr_value;
312 } else {
313 if (!(mmc_slot(host).ocr_mask & ocr_value)) {
314 dev_err(host->dev, "ocrmask %x is not supported\n",
315 mmc_slot(host).ocr_mask);
316 mmc_slot(host).ocr_mask = 0;
317 return -EINVAL;
318 }
319 }
320
321 /* Allow an aux regulator */
322 reg = regulator_get(host->dev, "vmmc_aux");
323 host->vcc_aux = IS_ERR(reg) ? NULL : reg;
324
325 /* For eMMC do not power off when not in sleep state */
326 if (mmc_slot(host).no_regulator_off_init)
327 return 0;
328 /*
329 * UGLY HACK: workaround regulator framework bugs.
330 * When the bootloader leaves a supply active, it's
331 * initialized with zero usecount ... and we can't
332 * disable it without first enabling it. Until the
333 * framework is fixed, we need a workaround like this
334 * (which is safe for MMC, but not in general).
335 */
336 if (regulator_is_enabled(host->vcc) > 0 ||
337 (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) {
338 int vdd = ffs(mmc_slot(host).ocr_mask) - 1;
339
340 mmc_slot(host).set_power(host->dev, host->slot_id,
341 1, vdd);
342 mmc_slot(host).set_power(host->dev, host->slot_id,
343 0, 0);
344 }
345 }
346
347 return 0;
348 }
349
350 static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
351 {
352 regulator_put(host->vcc);
353 regulator_put(host->vcc_aux);
354 mmc_slot(host).set_power = NULL;
355 }
356
357 static inline int omap_hsmmc_have_reg(void)
358 {
359 return 1;
360 }
361
362 #else
363
364 static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host)
365 {
366 return -EINVAL;
367 }
368
369 static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host)
370 {
371 }
372
373 static inline int omap_hsmmc_have_reg(void)
374 {
375 return 0;
376 }
377
378 #endif
379
380 static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata)
381 {
382 int ret;
383
384 if (gpio_is_valid(pdata->slots[0].switch_pin)) {
385 if (pdata->slots[0].cover)
386 pdata->slots[0].get_cover_state =
387 omap_hsmmc_get_cover_state;
388 else
389 pdata->slots[0].card_detect = omap_hsmmc_card_detect;
390 pdata->slots[0].card_detect_irq =
391 gpio_to_irq(pdata->slots[0].switch_pin);
392 ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd");
393 if (ret)
394 return ret;
395 ret = gpio_direction_input(pdata->slots[0].switch_pin);
396 if (ret)
397 goto err_free_sp;
398 } else
399 pdata->slots[0].switch_pin = -EINVAL;
400
401 if (gpio_is_valid(pdata->slots[0].gpio_wp)) {
402 pdata->slots[0].get_ro = omap_hsmmc_get_wp;
403 ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp");
404 if (ret)
405 goto err_free_cd;
406 ret = gpio_direction_input(pdata->slots[0].gpio_wp);
407 if (ret)
408 goto err_free_wp;
409 } else
410 pdata->slots[0].gpio_wp = -EINVAL;
411
412 return 0;
413
414 err_free_wp:
415 gpio_free(pdata->slots[0].gpio_wp);
416 err_free_cd:
417 if (gpio_is_valid(pdata->slots[0].switch_pin))
418 err_free_sp:
419 gpio_free(pdata->slots[0].switch_pin);
420 return ret;
421 }
422
423 static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata)
424 {
425 if (gpio_is_valid(pdata->slots[0].gpio_wp))
426 gpio_free(pdata->slots[0].gpio_wp);
427 if (gpio_is_valid(pdata->slots[0].switch_pin))
428 gpio_free(pdata->slots[0].switch_pin);
429 }
430
431 /*
432 * Start clock to the card
433 */
434 static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host)
435 {
436 OMAP_HSMMC_WRITE(host->base, SYSCTL,
437 OMAP_HSMMC_READ(host->base, SYSCTL) | CEN);
438 }
439
440 /*
441 * Stop clock to the card
442 */
443 static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host)
444 {
445 OMAP_HSMMC_WRITE(host->base, SYSCTL,
446 OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN);
447 if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0)
448 dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n");
449 }
450
451 static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host,
452 struct mmc_command *cmd)
453 {
454 unsigned int irq_mask;
455
456 if (host->use_dma)
457 irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE);
458 else
459 irq_mask = INT_EN_MASK;
460
461 /* Disable timeout for erases */
462 if (cmd->opcode == MMC_ERASE)
463 irq_mask &= ~DTO_ENABLE;
464
465 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
466 OMAP_HSMMC_WRITE(host->base, ISE, irq_mask);
467 OMAP_HSMMC_WRITE(host->base, IE, irq_mask);
468 }
469
470 static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host)
471 {
472 OMAP_HSMMC_WRITE(host->base, ISE, 0);
473 OMAP_HSMMC_WRITE(host->base, IE, 0);
474 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
475 }
476
477 /* Calculate divisor for the given clock frequency */
478 static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios)
479 {
480 u16 dsor = 0;
481
482 if (ios->clock) {
483 dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock);
484 if (dsor > 250)
485 dsor = 250;
486 }
487
488 return dsor;
489 }
490
491 static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host)
492 {
493 struct mmc_ios *ios = &host->mmc->ios;
494 unsigned long regval;
495 unsigned long timeout;
496
497 dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock);
498
499 omap_hsmmc_stop_clock(host);
500
501 regval = OMAP_HSMMC_READ(host->base, SYSCTL);
502 regval = regval & ~(CLKD_MASK | DTO_MASK);
503 regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16);
504 OMAP_HSMMC_WRITE(host->base, SYSCTL, regval);
505 OMAP_HSMMC_WRITE(host->base, SYSCTL,
506 OMAP_HSMMC_READ(host->base, SYSCTL) | ICE);
507
508 /* Wait till the ICS bit is set */
509 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
510 while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS
511 && time_before(jiffies, timeout))
512 cpu_relax();
513
514 omap_hsmmc_start_clock(host);
515 }
516
517 static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host)
518 {
519 struct mmc_ios *ios = &host->mmc->ios;
520 u32 con;
521
522 con = OMAP_HSMMC_READ(host->base, CON);
523 switch (ios->bus_width) {
524 case MMC_BUS_WIDTH_8:
525 OMAP_HSMMC_WRITE(host->base, CON, con | DW8);
526 break;
527 case MMC_BUS_WIDTH_4:
528 OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
529 OMAP_HSMMC_WRITE(host->base, HCTL,
530 OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT);
531 break;
532 case MMC_BUS_WIDTH_1:
533 OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
534 OMAP_HSMMC_WRITE(host->base, HCTL,
535 OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT);
536 break;
537 }
538 }
539
540 static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host)
541 {
542 struct mmc_ios *ios = &host->mmc->ios;
543 u32 con;
544
545 con = OMAP_HSMMC_READ(host->base, CON);
546 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
547 OMAP_HSMMC_WRITE(host->base, CON, con | OD);
548 else
549 OMAP_HSMMC_WRITE(host->base, CON, con & ~OD);
550 }
551
552 #ifdef CONFIG_PM
553
554 /*
555 * Restore the MMC host context, if it was lost as result of a
556 * power state change.
557 */
558 static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
559 {
560 struct mmc_ios *ios = &host->mmc->ios;
561 struct omap_mmc_platform_data *pdata = host->pdata;
562 int context_loss = 0;
563 u32 hctl, capa;
564 unsigned long timeout;
565
566 if (pdata->get_context_loss_count) {
567 context_loss = pdata->get_context_loss_count(host->dev);
568 if (context_loss < 0)
569 return 1;
570 }
571
572 dev_dbg(mmc_dev(host->mmc), "context was %slost\n",
573 context_loss == host->context_loss ? "not " : "");
574 if (host->context_loss == context_loss)
575 return 1;
576
577 /* Wait for hardware reset */
578 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
579 while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
580 && time_before(jiffies, timeout))
581 ;
582
583 /* Do software reset */
584 OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET);
585 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
586 while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE
587 && time_before(jiffies, timeout))
588 ;
589
590 OMAP_HSMMC_WRITE(host->base, SYSCONFIG,
591 OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE);
592
593 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
594 if (host->power_mode != MMC_POWER_OFF &&
595 (1 << ios->vdd) <= MMC_VDD_23_24)
596 hctl = SDVS18;
597 else
598 hctl = SDVS30;
599 capa = VS30 | VS18;
600 } else {
601 hctl = SDVS18;
602 capa = VS18;
603 }
604
605 OMAP_HSMMC_WRITE(host->base, HCTL,
606 OMAP_HSMMC_READ(host->base, HCTL) | hctl);
607
608 OMAP_HSMMC_WRITE(host->base, CAPA,
609 OMAP_HSMMC_READ(host->base, CAPA) | capa);
610
611 OMAP_HSMMC_WRITE(host->base, HCTL,
612 OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
613
614 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
615 while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP
616 && time_before(jiffies, timeout))
617 ;
618
619 omap_hsmmc_disable_irq(host);
620
621 /* Do not initialize card-specific things if the power is off */
622 if (host->power_mode == MMC_POWER_OFF)
623 goto out;
624
625 omap_hsmmc_set_bus_width(host);
626
627 omap_hsmmc_set_clock(host);
628
629 omap_hsmmc_set_bus_mode(host);
630
631 out:
632 host->context_loss = context_loss;
633
634 dev_dbg(mmc_dev(host->mmc), "context is restored\n");
635 return 0;
636 }
637
638 /*
639 * Save the MMC host context (store the number of power state changes so far).
640 */
641 static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
642 {
643 struct omap_mmc_platform_data *pdata = host->pdata;
644 int context_loss;
645
646 if (pdata->get_context_loss_count) {
647 context_loss = pdata->get_context_loss_count(host->dev);
648 if (context_loss < 0)
649 return;
650 host->context_loss = context_loss;
651 }
652 }
653
654 #else
655
656 static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
657 {
658 return 0;
659 }
660
661 static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
662 {
663 }
664
665 #endif
666
667 /*
668 * Send init stream sequence to card
669 * before sending IDLE command
670 */
671 static void send_init_stream(struct omap_hsmmc_host *host)
672 {
673 int reg = 0;
674 unsigned long timeout;
675
676 if (host->protect_card)
677 return;
678
679 disable_irq(host->irq);
680
681 OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK);
682 OMAP_HSMMC_WRITE(host->base, CON,
683 OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM);
684 OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD);
685
686 timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS);
687 while ((reg != CC) && time_before(jiffies, timeout))
688 reg = OMAP_HSMMC_READ(host->base, STAT) & CC;
689
690 OMAP_HSMMC_WRITE(host->base, CON,
691 OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM);
692
693 OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR);
694 OMAP_HSMMC_READ(host->base, STAT);
695
696 enable_irq(host->irq);
697 }
698
699 static inline
700 int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host)
701 {
702 int r = 1;
703
704 if (mmc_slot(host).get_cover_state)
705 r = mmc_slot(host).get_cover_state(host->dev, host->slot_id);
706 return r;
707 }
708
709 static ssize_t
710 omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr,
711 char *buf)
712 {
713 struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
714 struct omap_hsmmc_host *host = mmc_priv(mmc);
715
716 return sprintf(buf, "%s\n",
717 omap_hsmmc_cover_is_closed(host) ? "closed" : "open");
718 }
719
720 static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL);
721
722 static ssize_t
723 omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr,
724 char *buf)
725 {
726 struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
727 struct omap_hsmmc_host *host = mmc_priv(mmc);
728
729 return sprintf(buf, "%s\n", mmc_slot(host).name);
730 }
731
732 static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL);
733
734 /*
735 * Configure the response type and send the cmd.
736 */
737 static void
738 omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd,
739 struct mmc_data *data)
740 {
741 int cmdreg = 0, resptype = 0, cmdtype = 0;
742
743 dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n",
744 mmc_hostname(host->mmc), cmd->opcode, cmd->arg);
745 host->cmd = cmd;
746
747 omap_hsmmc_enable_irq(host, cmd);
748
749 host->response_busy = 0;
750 if (cmd->flags & MMC_RSP_PRESENT) {
751 if (cmd->flags & MMC_RSP_136)
752 resptype = 1;
753 else if (cmd->flags & MMC_RSP_BUSY) {
754 resptype = 3;
755 host->response_busy = 1;
756 } else
757 resptype = 2;
758 }
759
760 /*
761 * Unlike OMAP1 controller, the cmdtype does not seem to be based on
762 * ac, bc, adtc, bcr. Only commands ending an open ended transfer need
763 * a val of 0x3, rest 0x0.
764 */
765 if (cmd == host->mrq->stop)
766 cmdtype = 0x3;
767
768 cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22);
769
770 if (data) {
771 cmdreg |= DP_SELECT | MSBS | BCE;
772 if (data->flags & MMC_DATA_READ)
773 cmdreg |= DDIR;
774 else
775 cmdreg &= ~(DDIR);
776 }
777
778 if (host->use_dma)
779 cmdreg |= DMA_EN;
780
781 host->req_in_progress = 1;
782
783 OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg);
784 OMAP_HSMMC_WRITE(host->base, CMD, cmdreg);
785 }
786
787 static int
788 omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data)
789 {
790 if (data->flags & MMC_DATA_WRITE)
791 return DMA_TO_DEVICE;
792 else
793 return DMA_FROM_DEVICE;
794 }
795
796 static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq)
797 {
798 int dma_ch;
799
800 spin_lock(&host->irq_lock);
801 host->req_in_progress = 0;
802 dma_ch = host->dma_ch;
803 spin_unlock(&host->irq_lock);
804
805 omap_hsmmc_disable_irq(host);
806 /* Do not complete the request if DMA is still in progress */
807 if (mrq->data && host->use_dma && dma_ch != -1)
808 return;
809 host->mrq = NULL;
810 mmc_request_done(host->mmc, mrq);
811 }
812
813 /*
814 * Notify the transfer complete to MMC core
815 */
816 static void
817 omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data)
818 {
819 if (!data) {
820 struct mmc_request *mrq = host->mrq;
821
822 /* TC before CC from CMD6 - don't know why, but it happens */
823 if (host->cmd && host->cmd->opcode == 6 &&
824 host->response_busy) {
825 host->response_busy = 0;
826 return;
827 }
828
829 omap_hsmmc_request_done(host, mrq);
830 return;
831 }
832
833 host->data = NULL;
834
835 if (!data->error)
836 data->bytes_xfered += data->blocks * (data->blksz);
837 else
838 data->bytes_xfered = 0;
839
840 if (!data->stop) {
841 omap_hsmmc_request_done(host, data->mrq);
842 return;
843 }
844 omap_hsmmc_start_command(host, data->stop, NULL);
845 }
846
847 /*
848 * Notify the core about command completion
849 */
850 static void
851 omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd)
852 {
853 host->cmd = NULL;
854
855 if (cmd->flags & MMC_RSP_PRESENT) {
856 if (cmd->flags & MMC_RSP_136) {
857 /* response type 2 */
858 cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10);
859 cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32);
860 cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54);
861 cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76);
862 } else {
863 /* response types 1, 1b, 3, 4, 5, 6 */
864 cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10);
865 }
866 }
867 if ((host->data == NULL && !host->response_busy) || cmd->error)
868 omap_hsmmc_request_done(host, cmd->mrq);
869 }
870
871 /*
872 * DMA clean up for command errors
873 */
874 static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno)
875 {
876 int dma_ch;
877
878 host->data->error = errno;
879
880 spin_lock(&host->irq_lock);
881 dma_ch = host->dma_ch;
882 host->dma_ch = -1;
883 spin_unlock(&host->irq_lock);
884
885 if (host->use_dma && dma_ch != -1) {
886 dma_unmap_sg(mmc_dev(host->mmc), host->data->sg,
887 host->data->sg_len,
888 omap_hsmmc_get_dma_dir(host, host->data));
889 omap_free_dma(dma_ch);
890 host->data->host_cookie = 0;
891 }
892 host->data = NULL;
893 }
894
895 /*
896 * Readable error output
897 */
898 #ifdef CONFIG_MMC_DEBUG
899 static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status)
900 {
901 /* --- means reserved bit without definition at documentation */
902 static const char *omap_hsmmc_status_bits[] = {
903 "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" ,
904 "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI",
905 "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" ,
906 "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---"
907 };
908 char res[256];
909 char *buf = res;
910 int len, i;
911
912 len = sprintf(buf, "MMC IRQ 0x%x :", status);
913 buf += len;
914
915 for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++)
916 if (status & (1 << i)) {
917 len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]);
918 buf += len;
919 }
920
921 dev_dbg(mmc_dev(host->mmc), "%s\n", res);
922 }
923 #else
924 static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host,
925 u32 status)
926 {
927 }
928 #endif /* CONFIG_MMC_DEBUG */
929
930 /*
931 * MMC controller internal state machines reset
932 *
933 * Used to reset command or data internal state machines, using respectively
934 * SRC or SRD bit of SYSCTL register
935 * Can be called from interrupt context
936 */
937 static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host,
938 unsigned long bit)
939 {
940 unsigned long i = 0;
941 unsigned long limit = (loops_per_jiffy *
942 msecs_to_jiffies(MMC_TIMEOUT_MS));
943
944 OMAP_HSMMC_WRITE(host->base, SYSCTL,
945 OMAP_HSMMC_READ(host->base, SYSCTL) | bit);
946
947 /*
948 * OMAP4 ES2 and greater has an updated reset logic.
949 * Monitor a 0->1 transition first
950 */
951 if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) {
952 while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit))
953 && (i++ < limit))
954 cpu_relax();
955 }
956 i = 0;
957
958 while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) &&
959 (i++ < limit))
960 cpu_relax();
961
962 if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit)
963 dev_err(mmc_dev(host->mmc),
964 "Timeout waiting on controller reset in %s\n",
965 __func__);
966 }
967
968 static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status)
969 {
970 struct mmc_data *data;
971 int end_cmd = 0, end_trans = 0;
972
973 if (!host->req_in_progress) {
974 do {
975 OMAP_HSMMC_WRITE(host->base, STAT, status);
976 /* Flush posted write */
977 status = OMAP_HSMMC_READ(host->base, STAT);
978 } while (status & INT_EN_MASK);
979 return;
980 }
981
982 data = host->data;
983 dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
984
985 if (status & ERR) {
986 omap_hsmmc_dbg_report_irq(host, status);
987 if ((status & CMD_TIMEOUT) ||
988 (status & CMD_CRC)) {
989 if (host->cmd) {
990 if (status & CMD_TIMEOUT) {
991 omap_hsmmc_reset_controller_fsm(host,
992 SRC);
993 host->cmd->error = -ETIMEDOUT;
994 } else {
995 host->cmd->error = -EILSEQ;
996 }
997 end_cmd = 1;
998 }
999 if (host->data || host->response_busy) {
1000 if (host->data)
1001 omap_hsmmc_dma_cleanup(host,
1002 -ETIMEDOUT);
1003 host->response_busy = 0;
1004 omap_hsmmc_reset_controller_fsm(host, SRD);
1005 }
1006 }
1007 if ((status & DATA_TIMEOUT) ||
1008 (status & DATA_CRC)) {
1009 if (host->data || host->response_busy) {
1010 int err = (status & DATA_TIMEOUT) ?
1011 -ETIMEDOUT : -EILSEQ;
1012
1013 if (host->data)
1014 omap_hsmmc_dma_cleanup(host, err);
1015 else
1016 host->mrq->cmd->error = err;
1017 host->response_busy = 0;
1018 omap_hsmmc_reset_controller_fsm(host, SRD);
1019 end_trans = 1;
1020 }
1021 }
1022 if (status & CARD_ERR) {
1023 dev_dbg(mmc_dev(host->mmc),
1024 "Ignoring card err CMD%d\n", host->cmd->opcode);
1025 if (host->cmd)
1026 end_cmd = 1;
1027 if (host->data)
1028 end_trans = 1;
1029 }
1030 }
1031
1032 OMAP_HSMMC_WRITE(host->base, STAT, status);
1033
1034 if (end_cmd || ((status & CC) && host->cmd))
1035 omap_hsmmc_cmd_done(host, host->cmd);
1036 if ((end_trans || (status & TC)) && host->mrq)
1037 omap_hsmmc_xfer_done(host, data);
1038 }
1039
1040 /*
1041 * MMC controller IRQ handler
1042 */
1043 static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id)
1044 {
1045 struct omap_hsmmc_host *host = dev_id;
1046 int status;
1047
1048 status = OMAP_HSMMC_READ(host->base, STAT);
1049 do {
1050 omap_hsmmc_do_irq(host, status);
1051 /* Flush posted write */
1052 status = OMAP_HSMMC_READ(host->base, STAT);
1053 } while (status & INT_EN_MASK);
1054
1055 return IRQ_HANDLED;
1056 }
1057
1058 static void set_sd_bus_power(struct omap_hsmmc_host *host)
1059 {
1060 unsigned long i;
1061
1062 OMAP_HSMMC_WRITE(host->base, HCTL,
1063 OMAP_HSMMC_READ(host->base, HCTL) | SDBP);
1064 for (i = 0; i < loops_per_jiffy; i++) {
1065 if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP)
1066 break;
1067 cpu_relax();
1068 }
1069 }
1070
1071 /*
1072 * Switch MMC interface voltage ... only relevant for MMC1.
1073 *
1074 * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver.
1075 * The MMC2 transceiver controls are used instead of DAT4..DAT7.
1076 * Some chips, like eMMC ones, use internal transceivers.
1077 */
1078 static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd)
1079 {
1080 u32 reg_val = 0;
1081 int ret;
1082
1083 /* Disable the clocks */
1084 pm_runtime_put_sync(host->dev);
1085 if (host->got_dbclk)
1086 clk_disable(host->dbclk);
1087
1088 /* Turn the power off */
1089 ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0);
1090
1091 /* Turn the power ON with given VDD 1.8 or 3.0v */
1092 if (!ret)
1093 ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1,
1094 vdd);
1095 pm_runtime_get_sync(host->dev);
1096 if (host->got_dbclk)
1097 clk_enable(host->dbclk);
1098
1099 if (ret != 0)
1100 goto err;
1101
1102 OMAP_HSMMC_WRITE(host->base, HCTL,
1103 OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR);
1104 reg_val = OMAP_HSMMC_READ(host->base, HCTL);
1105
1106 /*
1107 * If a MMC dual voltage card is detected, the set_ios fn calls
1108 * this fn with VDD bit set for 1.8V. Upon card removal from the
1109 * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF.
1110 *
1111 * Cope with a bit of slop in the range ... per data sheets:
1112 * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max,
1113 * but recommended values are 1.71V to 1.89V
1114 * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max,
1115 * but recommended values are 2.7V to 3.3V
1116 *
1117 * Board setup code shouldn't permit anything very out-of-range.
1118 * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the
1119 * middle range) but VSIM can't power DAT4..DAT7 at more than 3V.
1120 */
1121 if ((1 << vdd) <= MMC_VDD_23_24)
1122 reg_val |= SDVS18;
1123 else
1124 reg_val |= SDVS30;
1125
1126 OMAP_HSMMC_WRITE(host->base, HCTL, reg_val);
1127 set_sd_bus_power(host);
1128
1129 return 0;
1130 err:
1131 dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n");
1132 return ret;
1133 }
1134
1135 /* Protect the card while the cover is open */
1136 static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host)
1137 {
1138 if (!mmc_slot(host).get_cover_state)
1139 return;
1140
1141 host->reqs_blocked = 0;
1142 if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) {
1143 if (host->protect_card) {
1144 dev_info(host->dev, "%s: cover is closed, "
1145 "card is now accessible\n",
1146 mmc_hostname(host->mmc));
1147 host->protect_card = 0;
1148 }
1149 } else {
1150 if (!host->protect_card) {
1151 dev_info(host->dev, "%s: cover is open, "
1152 "card is now inaccessible\n",
1153 mmc_hostname(host->mmc));
1154 host->protect_card = 1;
1155 }
1156 }
1157 }
1158
1159 /*
1160 * irq handler to notify the core about card insertion/removal
1161 */
1162 static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id)
1163 {
1164 struct omap_hsmmc_host *host = dev_id;
1165 struct omap_mmc_slot_data *slot = &mmc_slot(host);
1166 int carddetect;
1167
1168 if (host->suspended)
1169 return IRQ_HANDLED;
1170
1171 sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch");
1172
1173 if (slot->card_detect)
1174 carddetect = slot->card_detect(host->dev, host->slot_id);
1175 else {
1176 omap_hsmmc_protect_card(host);
1177 carddetect = -ENOSYS;
1178 }
1179
1180 if (carddetect)
1181 mmc_detect_change(host->mmc, (HZ * 200) / 1000);
1182 else
1183 mmc_detect_change(host->mmc, (HZ * 50) / 1000);
1184 return IRQ_HANDLED;
1185 }
1186
1187 static int omap_hsmmc_get_dma_sync_dev(struct omap_hsmmc_host *host,
1188 struct mmc_data *data)
1189 {
1190 int sync_dev;
1191
1192 if (data->flags & MMC_DATA_WRITE)
1193 sync_dev = host->dma_line_tx;
1194 else
1195 sync_dev = host->dma_line_rx;
1196 return sync_dev;
1197 }
1198
1199 static void omap_hsmmc_config_dma_params(struct omap_hsmmc_host *host,
1200 struct mmc_data *data,
1201 struct scatterlist *sgl)
1202 {
1203 int blksz, nblk, dma_ch;
1204
1205 dma_ch = host->dma_ch;
1206 if (data->flags & MMC_DATA_WRITE) {
1207 omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
1208 (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
1209 omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
1210 sg_dma_address(sgl), 0, 0);
1211 } else {
1212 omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT,
1213 (host->mapbase + OMAP_HSMMC_DATA), 0, 0);
1214 omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
1215 sg_dma_address(sgl), 0, 0);
1216 }
1217
1218 blksz = host->data->blksz;
1219 nblk = sg_dma_len(sgl) / blksz;
1220
1221 omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32,
1222 blksz / 4, nblk, OMAP_DMA_SYNC_FRAME,
1223 omap_hsmmc_get_dma_sync_dev(host, data),
1224 !(data->flags & MMC_DATA_WRITE));
1225
1226 omap_start_dma(dma_ch);
1227 }
1228
1229 /*
1230 * DMA call back function
1231 */
1232 static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data)
1233 {
1234 struct omap_hsmmc_host *host = cb_data;
1235 struct mmc_data *data;
1236 int dma_ch, req_in_progress;
1237
1238 if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) {
1239 dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n",
1240 ch_status);
1241 return;
1242 }
1243
1244 spin_lock(&host->irq_lock);
1245 if (host->dma_ch < 0) {
1246 spin_unlock(&host->irq_lock);
1247 return;
1248 }
1249
1250 data = host->mrq->data;
1251 host->dma_sg_idx++;
1252 if (host->dma_sg_idx < host->dma_len) {
1253 /* Fire up the next transfer. */
1254 omap_hsmmc_config_dma_params(host, data,
1255 data->sg + host->dma_sg_idx);
1256 spin_unlock(&host->irq_lock);
1257 return;
1258 }
1259
1260 if (!data->host_cookie)
1261 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
1262 omap_hsmmc_get_dma_dir(host, data));
1263
1264 req_in_progress = host->req_in_progress;
1265 dma_ch = host->dma_ch;
1266 host->dma_ch = -1;
1267 spin_unlock(&host->irq_lock);
1268
1269 omap_free_dma(dma_ch);
1270
1271 /* If DMA has finished after TC, complete the request */
1272 if (!req_in_progress) {
1273 struct mmc_request *mrq = host->mrq;
1274
1275 host->mrq = NULL;
1276 mmc_request_done(host->mmc, mrq);
1277 }
1278 }
1279
1280 static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
1281 struct mmc_data *data,
1282 struct omap_hsmmc_next *next)
1283 {
1284 int dma_len;
1285
1286 if (!next && data->host_cookie &&
1287 data->host_cookie != host->next_data.cookie) {
1288 dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d"
1289 " host->next_data.cookie %d\n",
1290 __func__, data->host_cookie, host->next_data.cookie);
1291 data->host_cookie = 0;
1292 }
1293
1294 /* Check if next job is already prepared */
1295 if (next ||
1296 (!next && data->host_cookie != host->next_data.cookie)) {
1297 dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg,
1298 data->sg_len,
1299 omap_hsmmc_get_dma_dir(host, data));
1300
1301 } else {
1302 dma_len = host->next_data.dma_len;
1303 host->next_data.dma_len = 0;
1304 }
1305
1306
1307 if (dma_len == 0)
1308 return -EINVAL;
1309
1310 if (next) {
1311 next->dma_len = dma_len;
1312 data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie;
1313 } else
1314 host->dma_len = dma_len;
1315
1316 return 0;
1317 }
1318
1319 /*
1320 * Routine to configure and start DMA for the MMC card
1321 */
1322 static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
1323 struct mmc_request *req)
1324 {
1325 int dma_ch = 0, ret = 0, i;
1326 struct mmc_data *data = req->data;
1327
1328 /* Sanity check: all the SG entries must be aligned by block size. */
1329 for (i = 0; i < data->sg_len; i++) {
1330 struct scatterlist *sgl;
1331
1332 sgl = data->sg + i;
1333 if (sgl->length % data->blksz)
1334 return -EINVAL;
1335 }
1336 if ((data->blksz % 4) != 0)
1337 /* REVISIT: The MMC buffer increments only when MSB is written.
1338 * Return error for blksz which is non multiple of four.
1339 */
1340 return -EINVAL;
1341
1342 BUG_ON(host->dma_ch != -1);
1343
1344 ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data),
1345 "MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch);
1346 if (ret != 0) {
1347 dev_err(mmc_dev(host->mmc),
1348 "%s: omap_request_dma() failed with %d\n",
1349 mmc_hostname(host->mmc), ret);
1350 return ret;
1351 }
1352 ret = omap_hsmmc_pre_dma_transfer(host, data, NULL);
1353 if (ret)
1354 return ret;
1355
1356 host->dma_ch = dma_ch;
1357 host->dma_sg_idx = 0;
1358
1359 omap_hsmmc_config_dma_params(host, data, data->sg);
1360
1361 return 0;
1362 }
1363
1364 static void set_data_timeout(struct omap_hsmmc_host *host,
1365 unsigned int timeout_ns,
1366 unsigned int timeout_clks)
1367 {
1368 unsigned int timeout, cycle_ns;
1369 uint32_t reg, clkd, dto = 0;
1370
1371 reg = OMAP_HSMMC_READ(host->base, SYSCTL);
1372 clkd = (reg & CLKD_MASK) >> CLKD_SHIFT;
1373 if (clkd == 0)
1374 clkd = 1;
1375
1376 cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd);
1377 timeout = timeout_ns / cycle_ns;
1378 timeout += timeout_clks;
1379 if (timeout) {
1380 while ((timeout & 0x80000000) == 0) {
1381 dto += 1;
1382 timeout <<= 1;
1383 }
1384 dto = 31 - dto;
1385 timeout <<= 1;
1386 if (timeout && dto)
1387 dto += 1;
1388 if (dto >= 13)
1389 dto -= 13;
1390 else
1391 dto = 0;
1392 if (dto > 14)
1393 dto = 14;
1394 }
1395
1396 reg &= ~DTO_MASK;
1397 reg |= dto << DTO_SHIFT;
1398 OMAP_HSMMC_WRITE(host->base, SYSCTL, reg);
1399 }
1400
1401 /*
1402 * Configure block length for MMC/SD cards and initiate the transfer.
1403 */
1404 static int
1405 omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req)
1406 {
1407 int ret;
1408 host->data = req->data;
1409
1410 if (req->data == NULL) {
1411 OMAP_HSMMC_WRITE(host->base, BLK, 0);
1412 /*
1413 * Set an arbitrary 100ms data timeout for commands with
1414 * busy signal.
1415 */
1416 if (req->cmd->flags & MMC_RSP_BUSY)
1417 set_data_timeout(host, 100000000U, 0);
1418 return 0;
1419 }
1420
1421 OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz)
1422 | (req->data->blocks << 16));
1423 set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks);
1424
1425 if (host->use_dma) {
1426 ret = omap_hsmmc_start_dma_transfer(host, req);
1427 if (ret != 0) {
1428 dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n");
1429 return ret;
1430 }
1431 }
1432 return 0;
1433 }
1434
1435 static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
1436 int err)
1437 {
1438 struct omap_hsmmc_host *host = mmc_priv(mmc);
1439 struct mmc_data *data = mrq->data;
1440
1441 if (host->use_dma) {
1442 if (data->host_cookie)
1443 dma_unmap_sg(mmc_dev(host->mmc), data->sg,
1444 data->sg_len,
1445 omap_hsmmc_get_dma_dir(host, data));
1446 data->host_cookie = 0;
1447 }
1448 }
1449
1450 static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
1451 bool is_first_req)
1452 {
1453 struct omap_hsmmc_host *host = mmc_priv(mmc);
1454
1455 if (mrq->data->host_cookie) {
1456 mrq->data->host_cookie = 0;
1457 return ;
1458 }
1459
1460 if (host->use_dma)
1461 if (omap_hsmmc_pre_dma_transfer(host, mrq->data,
1462 &host->next_data))
1463 mrq->data->host_cookie = 0;
1464 }
1465
1466 /*
1467 * Request function. for read/write operation
1468 */
1469 static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
1470 {
1471 struct omap_hsmmc_host *host = mmc_priv(mmc);
1472 int err;
1473
1474 BUG_ON(host->req_in_progress);
1475 BUG_ON(host->dma_ch != -1);
1476 if (host->protect_card) {
1477 if (host->reqs_blocked < 3) {
1478 /*
1479 * Ensure the controller is left in a consistent
1480 * state by resetting the command and data state
1481 * machines.
1482 */
1483 omap_hsmmc_reset_controller_fsm(host, SRD);
1484 omap_hsmmc_reset_controller_fsm(host, SRC);
1485 host->reqs_blocked += 1;
1486 }
1487 req->cmd->error = -EBADF;
1488 if (req->data)
1489 req->data->error = -EBADF;
1490 req->cmd->retries = 0;
1491 mmc_request_done(mmc, req);
1492 return;
1493 } else if (host->reqs_blocked)
1494 host->reqs_blocked = 0;
1495 WARN_ON(host->mrq != NULL);
1496 host->mrq = req;
1497 err = omap_hsmmc_prepare_data(host, req);
1498 if (err) {
1499 req->cmd->error = err;
1500 if (req->data)
1501 req->data->error = err;
1502 host->mrq = NULL;
1503 mmc_request_done(mmc, req);
1504 return;
1505 }
1506
1507 omap_hsmmc_start_command(host, req->cmd, req->data);
1508 }
1509
1510 /* Routine to configure clock values. Exposed API to core */
1511 static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
1512 {
1513 struct omap_hsmmc_host *host = mmc_priv(mmc);
1514 int do_send_init_stream = 0;
1515
1516 pm_runtime_get_sync(host->dev);
1517
1518 if (ios->power_mode != host->power_mode) {
1519 switch (ios->power_mode) {
1520 case MMC_POWER_OFF:
1521 mmc_slot(host).set_power(host->dev, host->slot_id,
1522 0, 0);
1523 host->vdd = 0;
1524 break;
1525 case MMC_POWER_UP:
1526 mmc_slot(host).set_power(host->dev, host->slot_id,
1527 1, ios->vdd);
1528 host->vdd = ios->vdd;
1529 break;
1530 case MMC_POWER_ON:
1531 do_send_init_stream = 1;
1532 break;
1533 }
1534 host->power_mode = ios->power_mode;
1535 }
1536
1537 /* FIXME: set registers based only on changes to ios */
1538
1539 omap_hsmmc_set_bus_width(host);
1540
1541 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
1542 /* Only MMC1 can interface at 3V without some flavor
1543 * of external transceiver; but they all handle 1.8V.
1544 */
1545 if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) &&
1546 (ios->vdd == DUAL_VOLT_OCR_BIT) &&
1547 /*
1548 * With pbias cell programming missing, this
1549 * can't be allowed when booting with device
1550 * tree.
1551 */
1552 !host->dev->of_node) {
1553 /*
1554 * The mmc_select_voltage fn of the core does
1555 * not seem to set the power_mode to
1556 * MMC_POWER_UP upon recalculating the voltage.
1557 * vdd 1.8v.
1558 */
1559 if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0)
1560 dev_dbg(mmc_dev(host->mmc),
1561 "Switch operation failed\n");
1562 }
1563 }
1564
1565 omap_hsmmc_set_clock(host);
1566
1567 if (do_send_init_stream)
1568 send_init_stream(host);
1569
1570 omap_hsmmc_set_bus_mode(host);
1571
1572 pm_runtime_put_autosuspend(host->dev);
1573 }
1574
1575 static int omap_hsmmc_get_cd(struct mmc_host *mmc)
1576 {
1577 struct omap_hsmmc_host *host = mmc_priv(mmc);
1578
1579 if (!mmc_slot(host).card_detect)
1580 return -ENOSYS;
1581 return mmc_slot(host).card_detect(host->dev, host->slot_id);
1582 }
1583
1584 static int omap_hsmmc_get_ro(struct mmc_host *mmc)
1585 {
1586 struct omap_hsmmc_host *host = mmc_priv(mmc);
1587
1588 if (!mmc_slot(host).get_ro)
1589 return -ENOSYS;
1590 return mmc_slot(host).get_ro(host->dev, 0);
1591 }
1592
1593 static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card)
1594 {
1595 struct omap_hsmmc_host *host = mmc_priv(mmc);
1596
1597 if (mmc_slot(host).init_card)
1598 mmc_slot(host).init_card(card);
1599 }
1600
1601 static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host)
1602 {
1603 u32 hctl, capa, value;
1604
1605 /* Only MMC1 supports 3.0V */
1606 if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
1607 hctl = SDVS30;
1608 capa = VS30 | VS18;
1609 } else {
1610 hctl = SDVS18;
1611 capa = VS18;
1612 }
1613
1614 value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK;
1615 OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl);
1616
1617 value = OMAP_HSMMC_READ(host->base, CAPA);
1618 OMAP_HSMMC_WRITE(host->base, CAPA, value | capa);
1619
1620 /* Set the controller to AUTO IDLE mode */
1621 value = OMAP_HSMMC_READ(host->base, SYSCONFIG);
1622 OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE);
1623
1624 /* Set SD bus power bit */
1625 set_sd_bus_power(host);
1626 }
1627
1628 static int omap_hsmmc_enable_fclk(struct mmc_host *mmc)
1629 {
1630 struct omap_hsmmc_host *host = mmc_priv(mmc);
1631
1632 pm_runtime_get_sync(host->dev);
1633
1634 return 0;
1635 }
1636
1637 static int omap_hsmmc_disable_fclk(struct mmc_host *mmc)
1638 {
1639 struct omap_hsmmc_host *host = mmc_priv(mmc);
1640
1641 pm_runtime_mark_last_busy(host->dev);
1642 pm_runtime_put_autosuspend(host->dev);
1643
1644 return 0;
1645 }
1646
1647 static const struct mmc_host_ops omap_hsmmc_ops = {
1648 .enable = omap_hsmmc_enable_fclk,
1649 .disable = omap_hsmmc_disable_fclk,
1650 .post_req = omap_hsmmc_post_req,
1651 .pre_req = omap_hsmmc_pre_req,
1652 .request = omap_hsmmc_request,
1653 .set_ios = omap_hsmmc_set_ios,
1654 .get_cd = omap_hsmmc_get_cd,
1655 .get_ro = omap_hsmmc_get_ro,
1656 .init_card = omap_hsmmc_init_card,
1657 /* NYET -- enable_sdio_irq */
1658 };
1659
1660 #ifdef CONFIG_DEBUG_FS
1661
1662 static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
1663 {
1664 struct mmc_host *mmc = s->private;
1665 struct omap_hsmmc_host *host = mmc_priv(mmc);
1666 int context_loss = 0;
1667
1668 if (host->pdata->get_context_loss_count)
1669 context_loss = host->pdata->get_context_loss_count(host->dev);
1670
1671 seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n",
1672 mmc->index, host->context_loss, context_loss);
1673
1674 if (host->suspended) {
1675 seq_printf(s, "host suspended, can't read registers\n");
1676 return 0;
1677 }
1678
1679 pm_runtime_get_sync(host->dev);
1680
1681 seq_printf(s, "SYSCONFIG:\t0x%08x\n",
1682 OMAP_HSMMC_READ(host->base, SYSCONFIG));
1683 seq_printf(s, "CON:\t\t0x%08x\n",
1684 OMAP_HSMMC_READ(host->base, CON));
1685 seq_printf(s, "HCTL:\t\t0x%08x\n",
1686 OMAP_HSMMC_READ(host->base, HCTL));
1687 seq_printf(s, "SYSCTL:\t\t0x%08x\n",
1688 OMAP_HSMMC_READ(host->base, SYSCTL));
1689 seq_printf(s, "IE:\t\t0x%08x\n",
1690 OMAP_HSMMC_READ(host->base, IE));
1691 seq_printf(s, "ISE:\t\t0x%08x\n",
1692 OMAP_HSMMC_READ(host->base, ISE));
1693 seq_printf(s, "CAPA:\t\t0x%08x\n",
1694 OMAP_HSMMC_READ(host->base, CAPA));
1695
1696 pm_runtime_mark_last_busy(host->dev);
1697 pm_runtime_put_autosuspend(host->dev);
1698
1699 return 0;
1700 }
1701
1702 static int omap_hsmmc_regs_open(struct inode *inode, struct file *file)
1703 {
1704 return single_open(file, omap_hsmmc_regs_show, inode->i_private);
1705 }
1706
1707 static const struct file_operations mmc_regs_fops = {
1708 .open = omap_hsmmc_regs_open,
1709 .read = seq_read,
1710 .llseek = seq_lseek,
1711 .release = single_release,
1712 };
1713
1714 static void omap_hsmmc_debugfs(struct mmc_host *mmc)
1715 {
1716 if (mmc->debugfs_root)
1717 debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root,
1718 mmc, &mmc_regs_fops);
1719 }
1720
1721 #else
1722
1723 static void omap_hsmmc_debugfs(struct mmc_host *mmc)
1724 {
1725 }
1726
1727 #endif
1728
1729 #ifdef CONFIG_OF
1730 static u16 omap4_reg_offset = 0x100;
1731
1732 static const struct of_device_id omap_mmc_of_match[] = {
1733 {
1734 .compatible = "ti,omap2-hsmmc",
1735 },
1736 {
1737 .compatible = "ti,omap3-hsmmc",
1738 },
1739 {
1740 .compatible = "ti,omap4-hsmmc",
1741 .data = &omap4_reg_offset,
1742 },
1743 {},
1744 };
1745 MODULE_DEVICE_TABLE(of, omap_mmc_of_match);
1746
1747 static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
1748 {
1749 struct omap_mmc_platform_data *pdata;
1750 struct device_node *np = dev->of_node;
1751 u32 bus_width;
1752
1753 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
1754 if (!pdata)
1755 return NULL; /* out of memory */
1756
1757 if (of_find_property(np, "ti,dual-volt", NULL))
1758 pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
1759
1760 /* This driver only supports 1 slot */
1761 pdata->nr_slots = 1;
1762 pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0);
1763 pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
1764
1765 if (of_find_property(np, "ti,non-removable", NULL)) {
1766 pdata->slots[0].nonremovable = true;
1767 pdata->slots[0].no_regulator_off_init = true;
1768 }
1769 of_property_read_u32(np, "ti,bus-width", &bus_width);
1770 if (bus_width == 4)
1771 pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA;
1772 else if (bus_width == 8)
1773 pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA;
1774
1775 if (of_find_property(np, "ti,needs-special-reset", NULL))
1776 pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
1777
1778 return pdata;
1779 }
1780 #else
1781 static inline struct omap_mmc_platform_data
1782 *of_get_hsmmc_pdata(struct device *dev)
1783 {
1784 return NULL;
1785 }
1786 #endif
1787
1788 static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
1789 {
1790 struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
1791 struct mmc_host *mmc;
1792 struct omap_hsmmc_host *host = NULL;
1793 struct resource *res;
1794 int ret, irq;
1795 const struct of_device_id *match;
1796
1797 match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev);
1798 if (match) {
1799 pdata = of_get_hsmmc_pdata(&pdev->dev);
1800 if (match->data) {
1801 u16 *offsetp = match->data;
1802 pdata->reg_offset = *offsetp;
1803 }
1804 }
1805
1806 if (pdata == NULL) {
1807 dev_err(&pdev->dev, "Platform Data is missing\n");
1808 return -ENXIO;
1809 }
1810
1811 if (pdata->nr_slots == 0) {
1812 dev_err(&pdev->dev, "No Slots\n");
1813 return -ENXIO;
1814 }
1815
1816 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1817 irq = platform_get_irq(pdev, 0);
1818 if (res == NULL || irq < 0)
1819 return -ENXIO;
1820
1821 res = request_mem_region(res->start, resource_size(res), pdev->name);
1822 if (res == NULL)
1823 return -EBUSY;
1824
1825 ret = omap_hsmmc_gpio_init(pdata);
1826 if (ret)
1827 goto err;
1828
1829 mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev);
1830 if (!mmc) {
1831 ret = -ENOMEM;
1832 goto err_alloc;
1833 }
1834
1835 host = mmc_priv(mmc);
1836 host->mmc = mmc;
1837 host->pdata = pdata;
1838 host->dev = &pdev->dev;
1839 host->use_dma = 1;
1840 host->dev->dma_mask = &pdata->dma_mask;
1841 host->dma_ch = -1;
1842 host->irq = irq;
1843 host->slot_id = 0;
1844 host->mapbase = res->start + pdata->reg_offset;
1845 host->base = ioremap(host->mapbase, SZ_4K);
1846 host->power_mode = MMC_POWER_OFF;
1847 host->next_data.cookie = 1;
1848
1849 platform_set_drvdata(pdev, host);
1850
1851 mmc->ops = &omap_hsmmc_ops;
1852
1853 /*
1854 * If regulator_disable can only put vcc_aux to sleep then there is
1855 * no off state.
1856 */
1857 if (mmc_slot(host).vcc_aux_disable_is_sleep)
1858 mmc_slot(host).no_off = 1;
1859
1860 mmc->f_min = OMAP_MMC_MIN_CLOCK;
1861
1862 if (pdata->max_freq > 0)
1863 mmc->f_max = pdata->max_freq;
1864 else
1865 mmc->f_max = OMAP_MMC_MAX_CLOCK;
1866
1867 spin_lock_init(&host->irq_lock);
1868
1869 host->fclk = clk_get(&pdev->dev, "fck");
1870 if (IS_ERR(host->fclk)) {
1871 ret = PTR_ERR(host->fclk);
1872 host->fclk = NULL;
1873 goto err1;
1874 }
1875
1876 if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) {
1877 dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n");
1878 mmc->caps2 |= MMC_CAP2_NO_MULTI_READ;
1879 }
1880
1881 pm_runtime_enable(host->dev);
1882 pm_runtime_get_sync(host->dev);
1883 pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY);
1884 pm_runtime_use_autosuspend(host->dev);
1885
1886 omap_hsmmc_context_save(host);
1887
1888 if (cpu_is_omap2430()) {
1889 host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck");
1890 /*
1891 * MMC can still work without debounce clock.
1892 */
1893 if (IS_ERR(host->dbclk))
1894 dev_warn(mmc_dev(host->mmc),
1895 "Failed to get debounce clock\n");
1896 else
1897 host->got_dbclk = 1;
1898
1899 if (host->got_dbclk)
1900 if (clk_enable(host->dbclk) != 0)
1901 dev_dbg(mmc_dev(host->mmc), "Enabling debounce"
1902 " clk failed\n");
1903 }
1904
1905 /* Since we do only SG emulation, we can have as many segs
1906 * as we want. */
1907 mmc->max_segs = 1024;
1908
1909 mmc->max_blk_size = 512; /* Block Length at max can be 1024 */
1910 mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */
1911 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1912 mmc->max_seg_size = mmc->max_req_size;
1913
1914 mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED |
1915 MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE;
1916
1917 mmc->caps |= mmc_slot(host).caps;
1918 if (mmc->caps & MMC_CAP_8_BIT_DATA)
1919 mmc->caps |= MMC_CAP_4_BIT_DATA;
1920
1921 if (mmc_slot(host).nonremovable)
1922 mmc->caps |= MMC_CAP_NONREMOVABLE;
1923
1924 mmc->pm_caps = mmc_slot(host).pm_caps;
1925
1926 omap_hsmmc_conf_bus_power(host);
1927
1928 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
1929 if (!res) {
1930 dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n");
1931 goto err_irq;
1932 }
1933 host->dma_line_tx = res->start;
1934
1935 res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
1936 if (!res) {
1937 dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n");
1938 goto err_irq;
1939 }
1940 host->dma_line_rx = res->start;
1941
1942 /* Request IRQ for MMC operations */
1943 ret = request_irq(host->irq, omap_hsmmc_irq, 0,
1944 mmc_hostname(mmc), host);
1945 if (ret) {
1946 dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n");
1947 goto err_irq;
1948 }
1949
1950 if (pdata->init != NULL) {
1951 if (pdata->init(&pdev->dev) != 0) {
1952 dev_dbg(mmc_dev(host->mmc),
1953 "Unable to configure MMC IRQs\n");
1954 goto err_irq_cd_init;
1955 }
1956 }
1957
1958 if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) {
1959 ret = omap_hsmmc_reg_get(host);
1960 if (ret)
1961 goto err_reg;
1962 host->use_reg = 1;
1963 }
1964
1965 mmc->ocr_avail = mmc_slot(host).ocr_mask;
1966
1967 /* Request IRQ for card detect */
1968 if ((mmc_slot(host).card_detect_irq)) {
1969 ret = request_threaded_irq(mmc_slot(host).card_detect_irq,
1970 NULL,
1971 omap_hsmmc_detect,
1972 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
1973 mmc_hostname(mmc), host);
1974 if (ret) {
1975 dev_dbg(mmc_dev(host->mmc),
1976 "Unable to grab MMC CD IRQ\n");
1977 goto err_irq_cd;
1978 }
1979 pdata->suspend = omap_hsmmc_suspend_cdirq;
1980 pdata->resume = omap_hsmmc_resume_cdirq;
1981 }
1982
1983 omap_hsmmc_disable_irq(host);
1984
1985 omap_hsmmc_protect_card(host);
1986
1987 mmc_add_host(mmc);
1988
1989 if (mmc_slot(host).name != NULL) {
1990 ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name);
1991 if (ret < 0)
1992 goto err_slot_name;
1993 }
1994 if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) {
1995 ret = device_create_file(&mmc->class_dev,
1996 &dev_attr_cover_switch);
1997 if (ret < 0)
1998 goto err_slot_name;
1999 }
2000
2001 omap_hsmmc_debugfs(mmc);
2002 pm_runtime_mark_last_busy(host->dev);
2003 pm_runtime_put_autosuspend(host->dev);
2004
2005 return 0;
2006
2007 err_slot_name:
2008 mmc_remove_host(mmc);
2009 free_irq(mmc_slot(host).card_detect_irq, host);
2010 err_irq_cd:
2011 if (host->use_reg)
2012 omap_hsmmc_reg_put(host);
2013 err_reg:
2014 if (host->pdata->cleanup)
2015 host->pdata->cleanup(&pdev->dev);
2016 err_irq_cd_init:
2017 free_irq(host->irq, host);
2018 err_irq:
2019 pm_runtime_put_sync(host->dev);
2020 pm_runtime_disable(host->dev);
2021 clk_put(host->fclk);
2022 if (host->got_dbclk) {
2023 clk_disable(host->dbclk);
2024 clk_put(host->dbclk);
2025 }
2026 err1:
2027 iounmap(host->base);
2028 platform_set_drvdata(pdev, NULL);
2029 mmc_free_host(mmc);
2030 err_alloc:
2031 omap_hsmmc_gpio_free(pdata);
2032 err:
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 pm_runtime_put_sync(host->dev);
2053 pm_runtime_disable(host->dev);
2054 clk_put(host->fclk);
2055 if (host->got_dbclk) {
2056 clk_disable(host->dbclk);
2057 clk_put(host->dbclk);
2058 }
2059
2060 mmc_free_host(host->mmc);
2061 iounmap(host->base);
2062 omap_hsmmc_gpio_free(pdev->dev.platform_data);
2063
2064 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2065 if (res)
2066 release_mem_region(res->start, resource_size(res));
2067 platform_set_drvdata(pdev, NULL);
2068
2069 return 0;
2070 }
2071
2072 #ifdef CONFIG_PM
2073 static int omap_hsmmc_suspend(struct device *dev)
2074 {
2075 int ret = 0;
2076 struct omap_hsmmc_host *host = dev_get_drvdata(dev);
2077
2078 if (!host)
2079 return 0;
2080
2081 if (host && host->suspended)
2082 return 0;
2083
2084 pm_runtime_get_sync(host->dev);
2085 host->suspended = 1;
2086 if (host->pdata->suspend) {
2087 ret = host->pdata->suspend(dev, host->slot_id);
2088 if (ret) {
2089 dev_dbg(dev, "Unable to handle MMC board"
2090 " level suspend\n");
2091 host->suspended = 0;
2092 return ret;
2093 }
2094 }
2095 ret = mmc_suspend_host(host->mmc);
2096
2097 if (ret) {
2098 host->suspended = 0;
2099 if (host->pdata->resume) {
2100 ret = host->pdata->resume(dev, host->slot_id);
2101 if (ret)
2102 dev_dbg(dev, "Unmask interrupt failed\n");
2103 }
2104 goto err;
2105 }
2106
2107 if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) {
2108 omap_hsmmc_disable_irq(host);
2109 OMAP_HSMMC_WRITE(host->base, HCTL,
2110 OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP);
2111 }
2112
2113 if (host->got_dbclk)
2114 clk_disable(host->dbclk);
2115 err:
2116 pm_runtime_put_sync(host->dev);
2117 return ret;
2118 }
2119
2120 /* Routine to resume the MMC device */
2121 static int omap_hsmmc_resume(struct device *dev)
2122 {
2123 int ret = 0;
2124 struct omap_hsmmc_host *host = dev_get_drvdata(dev);
2125
2126 if (!host)
2127 return 0;
2128
2129 if (host && !host->suspended)
2130 return 0;
2131
2132 pm_runtime_get_sync(host->dev);
2133
2134 if (host->got_dbclk)
2135 clk_enable(host->dbclk);
2136
2137 if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER))
2138 omap_hsmmc_conf_bus_power(host);
2139
2140 if (host->pdata->resume) {
2141 ret = host->pdata->resume(dev, host->slot_id);
2142 if (ret)
2143 dev_dbg(dev, "Unmask interrupt failed\n");
2144 }
2145
2146 omap_hsmmc_protect_card(host);
2147
2148 /* Notify the core to resume the host */
2149 ret = mmc_resume_host(host->mmc);
2150 if (ret == 0)
2151 host->suspended = 0;
2152
2153 pm_runtime_mark_last_busy(host->dev);
2154 pm_runtime_put_autosuspend(host->dev);
2155
2156 return ret;
2157
2158 }
2159
2160 #else
2161 #define omap_hsmmc_suspend NULL
2162 #define omap_hsmmc_resume NULL
2163 #endif
2164
2165 static int omap_hsmmc_runtime_suspend(struct device *dev)
2166 {
2167 struct omap_hsmmc_host *host;
2168
2169 host = platform_get_drvdata(to_platform_device(dev));
2170 omap_hsmmc_context_save(host);
2171 dev_dbg(dev, "disabled\n");
2172
2173 return 0;
2174 }
2175
2176 static int omap_hsmmc_runtime_resume(struct device *dev)
2177 {
2178 struct omap_hsmmc_host *host;
2179
2180 host = platform_get_drvdata(to_platform_device(dev));
2181 omap_hsmmc_context_restore(host);
2182 dev_dbg(dev, "enabled\n");
2183
2184 return 0;
2185 }
2186
2187 static struct dev_pm_ops omap_hsmmc_dev_pm_ops = {
2188 .suspend = omap_hsmmc_suspend,
2189 .resume = omap_hsmmc_resume,
2190 .runtime_suspend = omap_hsmmc_runtime_suspend,
2191 .runtime_resume = omap_hsmmc_runtime_resume,
2192 };
2193
2194 static struct platform_driver omap_hsmmc_driver = {
2195 .probe = omap_hsmmc_probe,
2196 .remove = __devexit_p(omap_hsmmc_remove),
2197 .driver = {
2198 .name = DRIVER_NAME,
2199 .owner = THIS_MODULE,
2200 .pm = &omap_hsmmc_dev_pm_ops,
2201 .of_match_table = of_match_ptr(omap_mmc_of_match),
2202 },
2203 };
2204
2205 module_platform_driver(omap_hsmmc_driver);
2206 MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver");
2207 MODULE_LICENSE("GPL");
2208 MODULE_ALIAS("platform:" DRIVER_NAME);
2209 MODULE_AUTHOR("Texas Instruments Inc");
Linux kernel - Deliverables
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