]>
Commit | Line | Data |
---|---|---|
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/mmc/host.h> | |
30 | #include <linux/mmc/core.h> | |
31 | #include <linux/mmc/mmc.h> | |
32 | #include <linux/io.h> | |
33 | #include <linux/semaphore.h> | |
34 | #include <linux/gpio.h> | |
35 | #include <linux/regulator/consumer.h> | |
36 | #include <linux/pm_runtime.h> | |
37 | #include <plat/dma.h> | |
38 | #include <mach/hardware.h> | |
39 | #include <plat/board.h> | |
40 | #include <plat/mmc.h> | |
41 | #include <plat/cpu.h> | |
42 | ||
43 | /* OMAP HSMMC Host Controller Registers */ | |
44 | #define OMAP_HSMMC_SYSCONFIG 0x0010 | |
45 | #define OMAP_HSMMC_SYSSTATUS 0x0014 | |
46 | #define OMAP_HSMMC_CON 0x002C | |
47 | #define OMAP_HSMMC_BLK 0x0104 | |
48 | #define OMAP_HSMMC_ARG 0x0108 | |
49 | #define OMAP_HSMMC_CMD 0x010C | |
50 | #define OMAP_HSMMC_RSP10 0x0110 | |
51 | #define OMAP_HSMMC_RSP32 0x0114 | |
52 | #define OMAP_HSMMC_RSP54 0x0118 | |
53 | #define OMAP_HSMMC_RSP76 0x011C | |
54 | #define OMAP_HSMMC_DATA 0x0120 | |
55 | #define OMAP_HSMMC_HCTL 0x0128 | |
56 | #define OMAP_HSMMC_SYSCTL 0x012C | |
57 | #define OMAP_HSMMC_STAT 0x0130 | |
58 | #define OMAP_HSMMC_IE 0x0134 | |
59 | #define OMAP_HSMMC_ISE 0x0138 | |
60 | #define OMAP_HSMMC_CAPA 0x0140 | |
61 | ||
62 | #define VS18 (1 << 26) | |
63 | #define VS30 (1 << 25) | |
64 | #define SDVS18 (0x5 << 9) | |
65 | #define SDVS30 (0x6 << 9) | |
66 | #define SDVS33 (0x7 << 9) | |
67 | #define SDVS_MASK 0x00000E00 | |
68 | #define SDVSCLR 0xFFFFF1FF | |
69 | #define SDVSDET 0x00000400 | |
70 | #define AUTOIDLE 0x1 | |
71 | #define SDBP (1 << 8) | |
72 | #define DTO 0xe | |
73 | #define ICE 0x1 | |
74 | #define ICS 0x2 | |
75 | #define CEN (1 << 2) | |
76 | #define CLKD_MASK 0x0000FFC0 | |
77 | #define CLKD_SHIFT 6 | |
78 | #define DTO_MASK 0x000F0000 | |
79 | #define DTO_SHIFT 16 | |
80 | #define INT_EN_MASK 0x307F0033 | |
81 | #define BWR_ENABLE (1 << 4) | |
82 | #define BRR_ENABLE (1 << 5) | |
83 | #define DTO_ENABLE (1 << 20) | |
84 | #define INIT_STREAM (1 << 1) | |
85 | #define DP_SELECT (1 << 21) | |
86 | #define DDIR (1 << 4) | |
87 | #define DMA_EN 0x1 | |
88 | #define MSBS (1 << 5) | |
89 | #define BCE (1 << 1) | |
90 | #define FOUR_BIT (1 << 1) | |
91 | #define DW8 (1 << 5) | |
92 | #define CC 0x1 | |
93 | #define TC 0x02 | |
94 | #define OD 0x1 | |
95 | #define ERR (1 << 15) | |
96 | #define CMD_TIMEOUT (1 << 16) | |
97 | #define DATA_TIMEOUT (1 << 20) | |
98 | #define CMD_CRC (1 << 17) | |
99 | #define DATA_CRC (1 << 21) | |
100 | #define CARD_ERR (1 << 28) | |
101 | #define STAT_CLEAR 0xFFFFFFFF | |
102 | #define INIT_STREAM_CMD 0x00000000 | |
103 | #define DUAL_VOLT_OCR_BIT 7 | |
104 | #define SRC (1 << 25) | |
105 | #define SRD (1 << 26) | |
106 | #define SOFTRESET (1 << 1) | |
107 | #define RESETDONE (1 << 0) | |
108 | ||
109 | /* | |
110 | * FIXME: Most likely all the data using these _DEVID defines should come | |
111 | * from the platform_data, or implemented in controller and slot specific | |
112 | * functions. | |
113 | */ | |
114 | #define OMAP_MMC1_DEVID 0 | |
115 | #define OMAP_MMC2_DEVID 1 | |
116 | #define OMAP_MMC3_DEVID 2 | |
117 | #define OMAP_MMC4_DEVID 3 | |
118 | #define OMAP_MMC5_DEVID 4 | |
119 | ||
120 | #define MMC_AUTOSUSPEND_DELAY 100 | |
121 | #define MMC_TIMEOUT_MS 20 | |
122 | #define OMAP_MMC_MIN_CLOCK 400000 | |
123 | #define OMAP_MMC_MAX_CLOCK 52000000 | |
124 | #define DRIVER_NAME "omap_hsmmc" | |
125 | ||
126 | /* | |
127 | * One controller can have multiple slots, like on some omap boards using | |
128 | * omap.c controller driver. Luckily this is not currently done on any known | |
129 | * omap_hsmmc.c device. | |
130 | */ | |
131 | #define mmc_slot(host) (host->pdata->slots[host->slot_id]) | |
132 | ||
133 | /* | |
134 | * MMC Host controller read/write API's | |
135 | */ | |
136 | #define OMAP_HSMMC_READ(base, reg) \ | |
137 | __raw_readl((base) + OMAP_HSMMC_##reg) | |
138 | ||
139 | #define OMAP_HSMMC_WRITE(base, reg, val) \ | |
140 | __raw_writel((val), (base) + OMAP_HSMMC_##reg) | |
141 | ||
142 | struct omap_hsmmc_next { | |
143 | unsigned int dma_len; | |
144 | s32 cookie; | |
145 | }; | |
146 | ||
147 | struct omap_hsmmc_host { | |
148 | struct device *dev; | |
149 | struct mmc_host *mmc; | |
150 | struct mmc_request *mrq; | |
151 | struct mmc_command *cmd; | |
152 | struct mmc_data *data; | |
153 | struct clk *fclk; | |
154 | struct clk *dbclk; | |
155 | /* | |
156 | * vcc == configured supply | |
157 | * vcc_aux == optional | |
158 | * - MMC1, supply for DAT4..DAT7 | |
159 | * - MMC2/MMC2, external level shifter voltage supply, for | |
160 | * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) | |
161 | */ | |
162 | struct regulator *vcc; | |
163 | struct regulator *vcc_aux; | |
164 | void __iomem *base; | |
165 | resource_size_t mapbase; | |
166 | spinlock_t irq_lock; /* Prevent races with irq handler */ | |
167 | unsigned int id; | |
168 | unsigned int dma_len; | |
169 | unsigned int dma_sg_idx; | |
170 | unsigned char bus_mode; | |
171 | unsigned char power_mode; | |
172 | u32 *buffer; | |
173 | u32 bytesleft; | |
174 | int suspended; | |
175 | int irq; | |
176 | int use_dma, dma_ch; | |
177 | int dma_line_tx, dma_line_rx; | |
178 | int slot_id; | |
179 | int got_dbclk; | |
180 | int response_busy; | |
181 | int context_loss; | |
182 | int dpm_state; | |
183 | int vdd; | |
184 | int protect_card; | |
185 | int reqs_blocked; | |
186 | int use_reg; | |
187 | int req_in_progress; | |
188 | struct omap_hsmmc_next next_data; | |
189 | ||
190 | struct omap_mmc_platform_data *pdata; | |
191 | }; | |
192 | ||
193 | static int omap_hsmmc_card_detect(struct device *dev, int slot) | |
194 | { | |
195 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
196 | ||
197 | /* NOTE: assumes card detect signal is active-low */ | |
198 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
199 | } | |
200 | ||
201 | static int omap_hsmmc_get_wp(struct device *dev, int slot) | |
202 | { | |
203 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
204 | ||
205 | /* NOTE: assumes write protect signal is active-high */ | |
206 | return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); | |
207 | } | |
208 | ||
209 | static int omap_hsmmc_get_cover_state(struct device *dev, int slot) | |
210 | { | |
211 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
212 | ||
213 | /* NOTE: assumes card detect signal is active-low */ | |
214 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
215 | } | |
216 | ||
217 | #ifdef CONFIG_PM | |
218 | ||
219 | static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot) | |
220 | { | |
221 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
222 | ||
223 | disable_irq(mmc->slots[0].card_detect_irq); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static int omap_hsmmc_resume_cdirq(struct device *dev, int slot) | |
228 | { | |
229 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
230 | ||
231 | enable_irq(mmc->slots[0].card_detect_irq); | |
232 | return 0; | |
233 | } | |
234 | ||
235 | #else | |
236 | ||
237 | #define omap_hsmmc_suspend_cdirq NULL | |
238 | #define omap_hsmmc_resume_cdirq NULL | |
239 | ||
240 | #endif | |
241 | ||
242 | #ifdef CONFIG_REGULATOR | |
243 | ||
244 | static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, | |
245 | int vdd) | |
246 | { | |
247 | struct omap_hsmmc_host *host = | |
248 | platform_get_drvdata(to_platform_device(dev)); | |
249 | int ret = 0; | |
250 | ||
251 | /* | |
252 | * If we don't see a Vcc regulator, assume it's a fixed | |
253 | * voltage always-on regulator. | |
254 | */ | |
255 | if (!host->vcc) | |
256 | return 0; | |
257 | ||
258 | if (mmc_slot(host).before_set_reg) | |
259 | mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); | |
260 | ||
261 | /* | |
262 | * Assume Vcc regulator is used only to power the card ... OMAP | |
263 | * VDDS is used to power the pins, optionally with a transceiver to | |
264 | * support cards using voltages other than VDDS (1.8V nominal). When a | |
265 | * transceiver is used, DAT3..7 are muxed as transceiver control pins. | |
266 | * | |
267 | * In some cases this regulator won't support enable/disable; | |
268 | * e.g. it's a fixed rail for a WLAN chip. | |
269 | * | |
270 | * In other cases vcc_aux switches interface power. Example, for | |
271 | * eMMC cards it represents VccQ. Sometimes transceivers or SDIO | |
272 | * chips/cards need an interface voltage rail too. | |
273 | */ | |
274 | if (power_on) { | |
275 | ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); | |
276 | /* Enable interface voltage rail, if needed */ | |
277 | if (ret == 0 && host->vcc_aux) { | |
278 | ret = regulator_enable(host->vcc_aux); | |
279 | if (ret < 0) | |
280 | ret = mmc_regulator_set_ocr(host->mmc, | |
281 | host->vcc, 0); | |
282 | } | |
283 | } else { | |
284 | /* Shut down the rail */ | |
285 | if (host->vcc_aux) | |
286 | ret = regulator_disable(host->vcc_aux); | |
287 | if (!ret) { | |
288 | /* Then proceed to shut down the local regulator */ | |
289 | ret = mmc_regulator_set_ocr(host->mmc, | |
290 | host->vcc, 0); | |
291 | } | |
292 | } | |
293 | ||
294 | if (mmc_slot(host).after_set_reg) | |
295 | mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); | |
296 | ||
297 | return ret; | |
298 | } | |
299 | ||
300 | static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) | |
301 | { | |
302 | struct regulator *reg; | |
303 | int ret = 0; | |
304 | int ocr_value = 0; | |
305 | ||
306 | mmc_slot(host).set_power = omap_hsmmc_set_power; | |
307 | ||
308 | reg = regulator_get(host->dev, "vmmc"); | |
309 | if (IS_ERR(reg)) { | |
310 | dev_dbg(host->dev, "vmmc regulator missing\n"); | |
311 | /* | |
312 | * HACK: until fixed.c regulator is usable, | |
313 | * we don't require a main regulator | |
314 | * for MMC2 or MMC3 | |
315 | */ | |
316 | if (host->id == OMAP_MMC1_DEVID) { | |
317 | ret = PTR_ERR(reg); | |
318 | goto err; | |
319 | } | |
320 | } else { | |
321 | host->vcc = reg; | |
322 | ocr_value = mmc_regulator_get_ocrmask(reg); | |
323 | if (!mmc_slot(host).ocr_mask) { | |
324 | mmc_slot(host).ocr_mask = ocr_value; | |
325 | } else { | |
326 | if (!(mmc_slot(host).ocr_mask & ocr_value)) { | |
327 | pr_err("MMC%d ocrmask %x is not supported\n", | |
328 | host->id, mmc_slot(host).ocr_mask); | |
329 | mmc_slot(host).ocr_mask = 0; | |
330 | return -EINVAL; | |
331 | } | |
332 | } | |
333 | ||
334 | /* Allow an aux regulator */ | |
335 | reg = regulator_get(host->dev, "vmmc_aux"); | |
336 | host->vcc_aux = IS_ERR(reg) ? NULL : reg; | |
337 | ||
338 | /* For eMMC do not power off when not in sleep state */ | |
339 | if (mmc_slot(host).no_regulator_off_init) | |
340 | return 0; | |
341 | /* | |
342 | * UGLY HACK: workaround regulator framework bugs. | |
343 | * When the bootloader leaves a supply active, it's | |
344 | * initialized with zero usecount ... and we can't | |
345 | * disable it without first enabling it. Until the | |
346 | * framework is fixed, we need a workaround like this | |
347 | * (which is safe for MMC, but not in general). | |
348 | */ | |
349 | if (regulator_is_enabled(host->vcc) > 0 || | |
350 | (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) { | |
351 | int vdd = ffs(mmc_slot(host).ocr_mask) - 1; | |
352 | ||
353 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
354 | 1, vdd); | |
355 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
356 | 0, 0); | |
357 | } | |
358 | } | |
359 | ||
360 | return 0; | |
361 | ||
362 | err: | |
363 | mmc_slot(host).set_power = NULL; | |
364 | return ret; | |
365 | } | |
366 | ||
367 | static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
368 | { | |
369 | regulator_put(host->vcc); | |
370 | regulator_put(host->vcc_aux); | |
371 | mmc_slot(host).set_power = NULL; | |
372 | } | |
373 | ||
374 | static inline int omap_hsmmc_have_reg(void) | |
375 | { | |
376 | return 1; | |
377 | } | |
378 | ||
379 | #else | |
380 | ||
381 | static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) | |
382 | { | |
383 | return -EINVAL; | |
384 | } | |
385 | ||
386 | static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
387 | { | |
388 | } | |
389 | ||
390 | static inline int omap_hsmmc_have_reg(void) | |
391 | { | |
392 | return 0; | |
393 | } | |
394 | ||
395 | #endif | |
396 | ||
397 | static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) | |
398 | { | |
399 | int ret; | |
400 | ||
401 | if (gpio_is_valid(pdata->slots[0].switch_pin)) { | |
402 | if (pdata->slots[0].cover) | |
403 | pdata->slots[0].get_cover_state = | |
404 | omap_hsmmc_get_cover_state; | |
405 | else | |
406 | pdata->slots[0].card_detect = omap_hsmmc_card_detect; | |
407 | pdata->slots[0].card_detect_irq = | |
408 | gpio_to_irq(pdata->slots[0].switch_pin); | |
409 | ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd"); | |
410 | if (ret) | |
411 | return ret; | |
412 | ret = gpio_direction_input(pdata->slots[0].switch_pin); | |
413 | if (ret) | |
414 | goto err_free_sp; | |
415 | } else | |
416 | pdata->slots[0].switch_pin = -EINVAL; | |
417 | ||
418 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) { | |
419 | pdata->slots[0].get_ro = omap_hsmmc_get_wp; | |
420 | ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp"); | |
421 | if (ret) | |
422 | goto err_free_cd; | |
423 | ret = gpio_direction_input(pdata->slots[0].gpio_wp); | |
424 | if (ret) | |
425 | goto err_free_wp; | |
426 | } else | |
427 | pdata->slots[0].gpio_wp = -EINVAL; | |
428 | ||
429 | return 0; | |
430 | ||
431 | err_free_wp: | |
432 | gpio_free(pdata->slots[0].gpio_wp); | |
433 | err_free_cd: | |
434 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
435 | err_free_sp: | |
436 | gpio_free(pdata->slots[0].switch_pin); | |
437 | return ret; | |
438 | } | |
439 | ||
440 | static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) | |
441 | { | |
442 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) | |
443 | gpio_free(pdata->slots[0].gpio_wp); | |
444 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
445 | gpio_free(pdata->slots[0].switch_pin); | |
446 | } | |
447 | ||
448 | /* | |
449 | * Start clock to the card | |
450 | */ | |
451 | static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host) | |
452 | { | |
453 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
454 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); | |
455 | } | |
456 | ||
457 | /* | |
458 | * Stop clock to the card | |
459 | */ | |
460 | static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) | |
461 | { | |
462 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
463 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); | |
464 | if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0) | |
465 | dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n"); | |
466 | } | |
467 | ||
468 | static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, | |
469 | struct mmc_command *cmd) | |
470 | { | |
471 | unsigned int irq_mask; | |
472 | ||
473 | if (host->use_dma) | |
474 | irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE); | |
475 | else | |
476 | irq_mask = INT_EN_MASK; | |
477 | ||
478 | /* Disable timeout for erases */ | |
479 | if (cmd->opcode == MMC_ERASE) | |
480 | irq_mask &= ~DTO_ENABLE; | |
481 | ||
482 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
483 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
484 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); | |
485 | } | |
486 | ||
487 | static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) | |
488 | { | |
489 | OMAP_HSMMC_WRITE(host->base, ISE, 0); | |
490 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
491 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
492 | } | |
493 | ||
494 | /* Calculate divisor for the given clock frequency */ | |
495 | static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios) | |
496 | { | |
497 | u16 dsor = 0; | |
498 | ||
499 | if (ios->clock) { | |
500 | dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock); | |
501 | if (dsor > 250) | |
502 | dsor = 250; | |
503 | } | |
504 | ||
505 | return dsor; | |
506 | } | |
507 | ||
508 | static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host) | |
509 | { | |
510 | struct mmc_ios *ios = &host->mmc->ios; | |
511 | unsigned long regval; | |
512 | unsigned long timeout; | |
513 | ||
514 | dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock); | |
515 | ||
516 | omap_hsmmc_stop_clock(host); | |
517 | ||
518 | regval = OMAP_HSMMC_READ(host->base, SYSCTL); | |
519 | regval = regval & ~(CLKD_MASK | DTO_MASK); | |
520 | regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16); | |
521 | OMAP_HSMMC_WRITE(host->base, SYSCTL, regval); | |
522 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
523 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); | |
524 | ||
525 | /* Wait till the ICS bit is set */ | |
526 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
527 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS | |
528 | && time_before(jiffies, timeout)) | |
529 | cpu_relax(); | |
530 | ||
531 | omap_hsmmc_start_clock(host); | |
532 | } | |
533 | ||
534 | static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host) | |
535 | { | |
536 | struct mmc_ios *ios = &host->mmc->ios; | |
537 | u32 con; | |
538 | ||
539 | con = OMAP_HSMMC_READ(host->base, CON); | |
540 | switch (ios->bus_width) { | |
541 | case MMC_BUS_WIDTH_8: | |
542 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); | |
543 | break; | |
544 | case MMC_BUS_WIDTH_4: | |
545 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
546 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
547 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); | |
548 | break; | |
549 | case MMC_BUS_WIDTH_1: | |
550 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
551 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
552 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); | |
553 | break; | |
554 | } | |
555 | } | |
556 | ||
557 | static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host) | |
558 | { | |
559 | struct mmc_ios *ios = &host->mmc->ios; | |
560 | u32 con; | |
561 | ||
562 | con = OMAP_HSMMC_READ(host->base, CON); | |
563 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
564 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); | |
565 | else | |
566 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); | |
567 | } | |
568 | ||
569 | #ifdef CONFIG_PM | |
570 | ||
571 | /* | |
572 | * Restore the MMC host context, if it was lost as result of a | |
573 | * power state change. | |
574 | */ | |
575 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) | |
576 | { | |
577 | struct mmc_ios *ios = &host->mmc->ios; | |
578 | struct omap_mmc_platform_data *pdata = host->pdata; | |
579 | int context_loss = 0; | |
580 | u32 hctl, capa; | |
581 | unsigned long timeout; | |
582 | ||
583 | if (pdata->get_context_loss_count) { | |
584 | context_loss = pdata->get_context_loss_count(host->dev); | |
585 | if (context_loss < 0) | |
586 | return 1; | |
587 | } | |
588 | ||
589 | dev_dbg(mmc_dev(host->mmc), "context was %slost\n", | |
590 | context_loss == host->context_loss ? "not " : ""); | |
591 | if (host->context_loss == context_loss) | |
592 | return 1; | |
593 | ||
594 | /* Wait for hardware reset */ | |
595 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
596 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE | |
597 | && time_before(jiffies, timeout)) | |
598 | ; | |
599 | ||
600 | /* Do software reset */ | |
601 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET); | |
602 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
603 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE | |
604 | && time_before(jiffies, timeout)) | |
605 | ; | |
606 | ||
607 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, | |
608 | OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE); | |
609 | ||
610 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { | |
611 | if (host->power_mode != MMC_POWER_OFF && | |
612 | (1 << ios->vdd) <= MMC_VDD_23_24) | |
613 | hctl = SDVS18; | |
614 | else | |
615 | hctl = SDVS30; | |
616 | capa = VS30 | VS18; | |
617 | } else { | |
618 | hctl = SDVS18; | |
619 | capa = VS18; | |
620 | } | |
621 | ||
622 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
623 | OMAP_HSMMC_READ(host->base, HCTL) | hctl); | |
624 | ||
625 | OMAP_HSMMC_WRITE(host->base, CAPA, | |
626 | OMAP_HSMMC_READ(host->base, CAPA) | capa); | |
627 | ||
628 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
629 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
630 | ||
631 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
632 | while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP | |
633 | && time_before(jiffies, timeout)) | |
634 | ; | |
635 | ||
636 | omap_hsmmc_disable_irq(host); | |
637 | ||
638 | /* Do not initialize card-specific things if the power is off */ | |
639 | if (host->power_mode == MMC_POWER_OFF) | |
640 | goto out; | |
641 | ||
642 | omap_hsmmc_set_bus_width(host); | |
643 | ||
644 | omap_hsmmc_set_clock(host); | |
645 | ||
646 | omap_hsmmc_set_bus_mode(host); | |
647 | ||
648 | out: | |
649 | host->context_loss = context_loss; | |
650 | ||
651 | dev_dbg(mmc_dev(host->mmc), "context is restored\n"); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | /* | |
656 | * Save the MMC host context (store the number of power state changes so far). | |
657 | */ | |
658 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) | |
659 | { | |
660 | struct omap_mmc_platform_data *pdata = host->pdata; | |
661 | int context_loss; | |
662 | ||
663 | if (pdata->get_context_loss_count) { | |
664 | context_loss = pdata->get_context_loss_count(host->dev); | |
665 | if (context_loss < 0) | |
666 | return; | |
667 | host->context_loss = context_loss; | |
668 | } | |
669 | } | |
670 | ||
671 | #else | |
672 | ||
673 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) | |
674 | { | |
675 | return 0; | |
676 | } | |
677 | ||
678 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) | |
679 | { | |
680 | } | |
681 | ||
682 | #endif | |
683 | ||
684 | /* | |
685 | * Send init stream sequence to card | |
686 | * before sending IDLE command | |
687 | */ | |
688 | static void send_init_stream(struct omap_hsmmc_host *host) | |
689 | { | |
690 | int reg = 0; | |
691 | unsigned long timeout; | |
692 | ||
693 | if (host->protect_card) | |
694 | return; | |
695 | ||
696 | disable_irq(host->irq); | |
697 | ||
698 | OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); | |
699 | OMAP_HSMMC_WRITE(host->base, CON, | |
700 | OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM); | |
701 | OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD); | |
702 | ||
703 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
704 | while ((reg != CC) && time_before(jiffies, timeout)) | |
705 | reg = OMAP_HSMMC_READ(host->base, STAT) & CC; | |
706 | ||
707 | OMAP_HSMMC_WRITE(host->base, CON, | |
708 | OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM); | |
709 | ||
710 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
711 | OMAP_HSMMC_READ(host->base, STAT); | |
712 | ||
713 | enable_irq(host->irq); | |
714 | } | |
715 | ||
716 | static inline | |
717 | int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host) | |
718 | { | |
719 | int r = 1; | |
720 | ||
721 | if (mmc_slot(host).get_cover_state) | |
722 | r = mmc_slot(host).get_cover_state(host->dev, host->slot_id); | |
723 | return r; | |
724 | } | |
725 | ||
726 | static ssize_t | |
727 | omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr, | |
728 | char *buf) | |
729 | { | |
730 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
731 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
732 | ||
733 | return sprintf(buf, "%s\n", | |
734 | omap_hsmmc_cover_is_closed(host) ? "closed" : "open"); | |
735 | } | |
736 | ||
737 | static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL); | |
738 | ||
739 | static ssize_t | |
740 | omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, | |
741 | char *buf) | |
742 | { | |
743 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
744 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
745 | ||
746 | return sprintf(buf, "%s\n", mmc_slot(host).name); | |
747 | } | |
748 | ||
749 | static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); | |
750 | ||
751 | /* | |
752 | * Configure the response type and send the cmd. | |
753 | */ | |
754 | static void | |
755 | omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, | |
756 | struct mmc_data *data) | |
757 | { | |
758 | int cmdreg = 0, resptype = 0, cmdtype = 0; | |
759 | ||
760 | dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n", | |
761 | mmc_hostname(host->mmc), cmd->opcode, cmd->arg); | |
762 | host->cmd = cmd; | |
763 | ||
764 | omap_hsmmc_enable_irq(host, cmd); | |
765 | ||
766 | host->response_busy = 0; | |
767 | if (cmd->flags & MMC_RSP_PRESENT) { | |
768 | if (cmd->flags & MMC_RSP_136) | |
769 | resptype = 1; | |
770 | else if (cmd->flags & MMC_RSP_BUSY) { | |
771 | resptype = 3; | |
772 | host->response_busy = 1; | |
773 | } else | |
774 | resptype = 2; | |
775 | } | |
776 | ||
777 | /* | |
778 | * Unlike OMAP1 controller, the cmdtype does not seem to be based on | |
779 | * ac, bc, adtc, bcr. Only commands ending an open ended transfer need | |
780 | * a val of 0x3, rest 0x0. | |
781 | */ | |
782 | if (cmd == host->mrq->stop) | |
783 | cmdtype = 0x3; | |
784 | ||
785 | cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22); | |
786 | ||
787 | if (data) { | |
788 | cmdreg |= DP_SELECT | MSBS | BCE; | |
789 | if (data->flags & MMC_DATA_READ) | |
790 | cmdreg |= DDIR; | |
791 | else | |
792 | cmdreg &= ~(DDIR); | |
793 | } | |
794 | ||
795 | if (host->use_dma) | |
796 | cmdreg |= DMA_EN; | |
797 | ||
798 | host->req_in_progress = 1; | |
799 | ||
800 | OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg); | |
801 | OMAP_HSMMC_WRITE(host->base, CMD, cmdreg); | |
802 | } | |
803 | ||
804 | static int | |
805 | omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data) | |
806 | { | |
807 | if (data->flags & MMC_DATA_WRITE) | |
808 | return DMA_TO_DEVICE; | |
809 | else | |
810 | return DMA_FROM_DEVICE; | |
811 | } | |
812 | ||
813 | static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) | |
814 | { | |
815 | int dma_ch; | |
816 | ||
817 | spin_lock(&host->irq_lock); | |
818 | host->req_in_progress = 0; | |
819 | dma_ch = host->dma_ch; | |
820 | spin_unlock(&host->irq_lock); | |
821 | ||
822 | omap_hsmmc_disable_irq(host); | |
823 | /* Do not complete the request if DMA is still in progress */ | |
824 | if (mrq->data && host->use_dma && dma_ch != -1) | |
825 | return; | |
826 | host->mrq = NULL; | |
827 | mmc_request_done(host->mmc, mrq); | |
828 | } | |
829 | ||
830 | /* | |
831 | * Notify the transfer complete to MMC core | |
832 | */ | |
833 | static void | |
834 | omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) | |
835 | { | |
836 | if (!data) { | |
837 | struct mmc_request *mrq = host->mrq; | |
838 | ||
839 | /* TC before CC from CMD6 - don't know why, but it happens */ | |
840 | if (host->cmd && host->cmd->opcode == 6 && | |
841 | host->response_busy) { | |
842 | host->response_busy = 0; | |
843 | return; | |
844 | } | |
845 | ||
846 | omap_hsmmc_request_done(host, mrq); | |
847 | return; | |
848 | } | |
849 | ||
850 | host->data = NULL; | |
851 | ||
852 | if (!data->error) | |
853 | data->bytes_xfered += data->blocks * (data->blksz); | |
854 | else | |
855 | data->bytes_xfered = 0; | |
856 | ||
857 | if (!data->stop) { | |
858 | omap_hsmmc_request_done(host, data->mrq); | |
859 | return; | |
860 | } | |
861 | omap_hsmmc_start_command(host, data->stop, NULL); | |
862 | } | |
863 | ||
864 | /* | |
865 | * Notify the core about command completion | |
866 | */ | |
867 | static void | |
868 | omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) | |
869 | { | |
870 | host->cmd = NULL; | |
871 | ||
872 | if (cmd->flags & MMC_RSP_PRESENT) { | |
873 | if (cmd->flags & MMC_RSP_136) { | |
874 | /* response type 2 */ | |
875 | cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10); | |
876 | cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32); | |
877 | cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54); | |
878 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76); | |
879 | } else { | |
880 | /* response types 1, 1b, 3, 4, 5, 6 */ | |
881 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10); | |
882 | } | |
883 | } | |
884 | if ((host->data == NULL && !host->response_busy) || cmd->error) | |
885 | omap_hsmmc_request_done(host, cmd->mrq); | |
886 | } | |
887 | ||
888 | /* | |
889 | * DMA clean up for command errors | |
890 | */ | |
891 | static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) | |
892 | { | |
893 | int dma_ch; | |
894 | ||
895 | host->data->error = errno; | |
896 | ||
897 | spin_lock(&host->irq_lock); | |
898 | dma_ch = host->dma_ch; | |
899 | host->dma_ch = -1; | |
900 | spin_unlock(&host->irq_lock); | |
901 | ||
902 | if (host->use_dma && dma_ch != -1) { | |
903 | dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, | |
904 | host->data->sg_len, | |
905 | omap_hsmmc_get_dma_dir(host, host->data)); | |
906 | omap_free_dma(dma_ch); | |
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->got_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->got_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 | pr_info("%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 | pr_info("%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 int omap_hsmmc_get_dma_sync_dev(struct omap_hsmmc_host *host, | |
1205 | struct mmc_data *data) | |
1206 | { | |
1207 | int sync_dev; | |
1208 | ||
1209 | if (data->flags & MMC_DATA_WRITE) | |
1210 | sync_dev = host->dma_line_tx; | |
1211 | else | |
1212 | sync_dev = host->dma_line_rx; | |
1213 | return sync_dev; | |
1214 | } | |
1215 | ||
1216 | static void omap_hsmmc_config_dma_params(struct omap_hsmmc_host *host, | |
1217 | struct mmc_data *data, | |
1218 | struct scatterlist *sgl) | |
1219 | { | |
1220 | int blksz, nblk, dma_ch; | |
1221 | ||
1222 | dma_ch = host->dma_ch; | |
1223 | if (data->flags & MMC_DATA_WRITE) { | |
1224 | omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT, | |
1225 | (host->mapbase + OMAP_HSMMC_DATA), 0, 0); | |
1226 | omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC, | |
1227 | sg_dma_address(sgl), 0, 0); | |
1228 | } else { | |
1229 | omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT, | |
1230 | (host->mapbase + OMAP_HSMMC_DATA), 0, 0); | |
1231 | omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC, | |
1232 | sg_dma_address(sgl), 0, 0); | |
1233 | } | |
1234 | ||
1235 | blksz = host->data->blksz; | |
1236 | nblk = sg_dma_len(sgl) / blksz; | |
1237 | ||
1238 | omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32, | |
1239 | blksz / 4, nblk, OMAP_DMA_SYNC_FRAME, | |
1240 | omap_hsmmc_get_dma_sync_dev(host, data), | |
1241 | !(data->flags & MMC_DATA_WRITE)); | |
1242 | ||
1243 | omap_start_dma(dma_ch); | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * DMA call back function | |
1248 | */ | |
1249 | static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) | |
1250 | { | |
1251 | struct omap_hsmmc_host *host = cb_data; | |
1252 | struct mmc_data *data; | |
1253 | int dma_ch, req_in_progress; | |
1254 | ||
1255 | if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) { | |
1256 | dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n", | |
1257 | ch_status); | |
1258 | return; | |
1259 | } | |
1260 | ||
1261 | spin_lock(&host->irq_lock); | |
1262 | if (host->dma_ch < 0) { | |
1263 | spin_unlock(&host->irq_lock); | |
1264 | return; | |
1265 | } | |
1266 | ||
1267 | data = host->mrq->data; | |
1268 | host->dma_sg_idx++; | |
1269 | if (host->dma_sg_idx < host->dma_len) { | |
1270 | /* Fire up the next transfer. */ | |
1271 | omap_hsmmc_config_dma_params(host, data, | |
1272 | data->sg + host->dma_sg_idx); | |
1273 | spin_unlock(&host->irq_lock); | |
1274 | return; | |
1275 | } | |
1276 | ||
1277 | if (!data->host_cookie) | |
1278 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
1279 | omap_hsmmc_get_dma_dir(host, data)); | |
1280 | ||
1281 | req_in_progress = host->req_in_progress; | |
1282 | dma_ch = host->dma_ch; | |
1283 | host->dma_ch = -1; | |
1284 | spin_unlock(&host->irq_lock); | |
1285 | ||
1286 | omap_free_dma(dma_ch); | |
1287 | ||
1288 | /* If DMA has finished after TC, complete the request */ | |
1289 | if (!req_in_progress) { | |
1290 | struct mmc_request *mrq = host->mrq; | |
1291 | ||
1292 | host->mrq = NULL; | |
1293 | mmc_request_done(host->mmc, mrq); | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host, | |
1298 | struct mmc_data *data, | |
1299 | struct omap_hsmmc_next *next) | |
1300 | { | |
1301 | int dma_len; | |
1302 | ||
1303 | if (!next && data->host_cookie && | |
1304 | data->host_cookie != host->next_data.cookie) { | |
1305 | pr_warning("[%s] invalid cookie: data->host_cookie %d" | |
1306 | " host->next_data.cookie %d\n", | |
1307 | __func__, data->host_cookie, host->next_data.cookie); | |
1308 | data->host_cookie = 0; | |
1309 | } | |
1310 | ||
1311 | /* Check if next job is already prepared */ | |
1312 | if (next || | |
1313 | (!next && data->host_cookie != host->next_data.cookie)) { | |
1314 | dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, | |
1315 | data->sg_len, | |
1316 | omap_hsmmc_get_dma_dir(host, data)); | |
1317 | ||
1318 | } else { | |
1319 | dma_len = host->next_data.dma_len; | |
1320 | host->next_data.dma_len = 0; | |
1321 | } | |
1322 | ||
1323 | ||
1324 | if (dma_len == 0) | |
1325 | return -EINVAL; | |
1326 | ||
1327 | if (next) { | |
1328 | next->dma_len = dma_len; | |
1329 | data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie; | |
1330 | } else | |
1331 | host->dma_len = dma_len; | |
1332 | ||
1333 | return 0; | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * Routine to configure and start DMA for the MMC card | |
1338 | */ | |
1339 | static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host, | |
1340 | struct mmc_request *req) | |
1341 | { | |
1342 | int dma_ch = 0, ret = 0, i; | |
1343 | struct mmc_data *data = req->data; | |
1344 | ||
1345 | /* Sanity check: all the SG entries must be aligned by block size. */ | |
1346 | for (i = 0; i < data->sg_len; i++) { | |
1347 | struct scatterlist *sgl; | |
1348 | ||
1349 | sgl = data->sg + i; | |
1350 | if (sgl->length % data->blksz) | |
1351 | return -EINVAL; | |
1352 | } | |
1353 | if ((data->blksz % 4) != 0) | |
1354 | /* REVISIT: The MMC buffer increments only when MSB is written. | |
1355 | * Return error for blksz which is non multiple of four. | |
1356 | */ | |
1357 | return -EINVAL; | |
1358 | ||
1359 | BUG_ON(host->dma_ch != -1); | |
1360 | ||
1361 | ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data), | |
1362 | "MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch); | |
1363 | if (ret != 0) { | |
1364 | dev_err(mmc_dev(host->mmc), | |
1365 | "%s: omap_request_dma() failed with %d\n", | |
1366 | mmc_hostname(host->mmc), ret); | |
1367 | return ret; | |
1368 | } | |
1369 | ret = omap_hsmmc_pre_dma_transfer(host, data, NULL); | |
1370 | if (ret) | |
1371 | return ret; | |
1372 | ||
1373 | host->dma_ch = dma_ch; | |
1374 | host->dma_sg_idx = 0; | |
1375 | ||
1376 | omap_hsmmc_config_dma_params(host, data, data->sg); | |
1377 | ||
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static void set_data_timeout(struct omap_hsmmc_host *host, | |
1382 | unsigned int timeout_ns, | |
1383 | unsigned int timeout_clks) | |
1384 | { | |
1385 | unsigned int timeout, cycle_ns; | |
1386 | uint32_t reg, clkd, dto = 0; | |
1387 | ||
1388 | reg = OMAP_HSMMC_READ(host->base, SYSCTL); | |
1389 | clkd = (reg & CLKD_MASK) >> CLKD_SHIFT; | |
1390 | if (clkd == 0) | |
1391 | clkd = 1; | |
1392 | ||
1393 | cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd); | |
1394 | timeout = timeout_ns / cycle_ns; | |
1395 | timeout += timeout_clks; | |
1396 | if (timeout) { | |
1397 | while ((timeout & 0x80000000) == 0) { | |
1398 | dto += 1; | |
1399 | timeout <<= 1; | |
1400 | } | |
1401 | dto = 31 - dto; | |
1402 | timeout <<= 1; | |
1403 | if (timeout && dto) | |
1404 | dto += 1; | |
1405 | if (dto >= 13) | |
1406 | dto -= 13; | |
1407 | else | |
1408 | dto = 0; | |
1409 | if (dto > 14) | |
1410 | dto = 14; | |
1411 | } | |
1412 | ||
1413 | reg &= ~DTO_MASK; | |
1414 | reg |= dto << DTO_SHIFT; | |
1415 | OMAP_HSMMC_WRITE(host->base, SYSCTL, reg); | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * Configure block length for MMC/SD cards and initiate the transfer. | |
1420 | */ | |
1421 | static int | |
1422 | omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) | |
1423 | { | |
1424 | int ret; | |
1425 | host->data = req->data; | |
1426 | ||
1427 | if (req->data == NULL) { | |
1428 | OMAP_HSMMC_WRITE(host->base, BLK, 0); | |
1429 | /* | |
1430 | * Set an arbitrary 100ms data timeout for commands with | |
1431 | * busy signal. | |
1432 | */ | |
1433 | if (req->cmd->flags & MMC_RSP_BUSY) | |
1434 | set_data_timeout(host, 100000000U, 0); | |
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz) | |
1439 | | (req->data->blocks << 16)); | |
1440 | set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks); | |
1441 | ||
1442 | if (host->use_dma) { | |
1443 | ret = omap_hsmmc_start_dma_transfer(host, req); | |
1444 | if (ret != 0) { | |
1445 | dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n"); | |
1446 | return ret; | |
1447 | } | |
1448 | } | |
1449 | return 0; | |
1450 | } | |
1451 | ||
1452 | static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
1453 | int err) | |
1454 | { | |
1455 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1456 | struct mmc_data *data = mrq->data; | |
1457 | ||
1458 | if (host->use_dma) { | |
1459 | if (data->host_cookie) | |
1460 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
1461 | data->sg_len, | |
1462 | omap_hsmmc_get_dma_dir(host, data)); | |
1463 | data->host_cookie = 0; | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
1468 | bool is_first_req) | |
1469 | { | |
1470 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1471 | ||
1472 | if (mrq->data->host_cookie) { | |
1473 | mrq->data->host_cookie = 0; | |
1474 | return ; | |
1475 | } | |
1476 | ||
1477 | if (host->use_dma) | |
1478 | if (omap_hsmmc_pre_dma_transfer(host, mrq->data, | |
1479 | &host->next_data)) | |
1480 | mrq->data->host_cookie = 0; | |
1481 | } | |
1482 | ||
1483 | /* | |
1484 | * Request function. for read/write operation | |
1485 | */ | |
1486 | static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) | |
1487 | { | |
1488 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1489 | int err; | |
1490 | ||
1491 | BUG_ON(host->req_in_progress); | |
1492 | BUG_ON(host->dma_ch != -1); | |
1493 | if (host->protect_card) { | |
1494 | if (host->reqs_blocked < 3) { | |
1495 | /* | |
1496 | * Ensure the controller is left in a consistent | |
1497 | * state by resetting the command and data state | |
1498 | * machines. | |
1499 | */ | |
1500 | omap_hsmmc_reset_controller_fsm(host, SRD); | |
1501 | omap_hsmmc_reset_controller_fsm(host, SRC); | |
1502 | host->reqs_blocked += 1; | |
1503 | } | |
1504 | req->cmd->error = -EBADF; | |
1505 | if (req->data) | |
1506 | req->data->error = -EBADF; | |
1507 | req->cmd->retries = 0; | |
1508 | mmc_request_done(mmc, req); | |
1509 | return; | |
1510 | } else if (host->reqs_blocked) | |
1511 | host->reqs_blocked = 0; | |
1512 | WARN_ON(host->mrq != NULL); | |
1513 | host->mrq = req; | |
1514 | err = omap_hsmmc_prepare_data(host, req); | |
1515 | if (err) { | |
1516 | req->cmd->error = err; | |
1517 | if (req->data) | |
1518 | req->data->error = err; | |
1519 | host->mrq = NULL; | |
1520 | mmc_request_done(mmc, req); | |
1521 | return; | |
1522 | } | |
1523 | ||
1524 | omap_hsmmc_start_command(host, req->cmd, req->data); | |
1525 | } | |
1526 | ||
1527 | /* Routine to configure clock values. Exposed API to core */ | |
1528 | static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1529 | { | |
1530 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1531 | int do_send_init_stream = 0; | |
1532 | ||
1533 | pm_runtime_get_sync(host->dev); | |
1534 | ||
1535 | if (ios->power_mode != host->power_mode) { | |
1536 | switch (ios->power_mode) { | |
1537 | case MMC_POWER_OFF: | |
1538 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1539 | 0, 0); | |
1540 | host->vdd = 0; | |
1541 | break; | |
1542 | case MMC_POWER_UP: | |
1543 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1544 | 1, ios->vdd); | |
1545 | host->vdd = ios->vdd; | |
1546 | break; | |
1547 | case MMC_POWER_ON: | |
1548 | do_send_init_stream = 1; | |
1549 | break; | |
1550 | } | |
1551 | host->power_mode = ios->power_mode; | |
1552 | } | |
1553 | ||
1554 | /* FIXME: set registers based only on changes to ios */ | |
1555 | ||
1556 | omap_hsmmc_set_bus_width(host); | |
1557 | ||
1558 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { | |
1559 | /* Only MMC1 can interface at 3V without some flavor | |
1560 | * of external transceiver; but they all handle 1.8V. | |
1561 | */ | |
1562 | if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) && | |
1563 | (ios->vdd == DUAL_VOLT_OCR_BIT)) { | |
1564 | /* | |
1565 | * The mmc_select_voltage fn of the core does | |
1566 | * not seem to set the power_mode to | |
1567 | * MMC_POWER_UP upon recalculating the voltage. | |
1568 | * vdd 1.8v. | |
1569 | */ | |
1570 | if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0) | |
1571 | dev_dbg(mmc_dev(host->mmc), | |
1572 | "Switch operation failed\n"); | |
1573 | } | |
1574 | } | |
1575 | ||
1576 | omap_hsmmc_set_clock(host); | |
1577 | ||
1578 | if (do_send_init_stream) | |
1579 | send_init_stream(host); | |
1580 | ||
1581 | omap_hsmmc_set_bus_mode(host); | |
1582 | ||
1583 | pm_runtime_put_autosuspend(host->dev); | |
1584 | } | |
1585 | ||
1586 | static int omap_hsmmc_get_cd(struct mmc_host *mmc) | |
1587 | { | |
1588 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1589 | ||
1590 | if (!mmc_slot(host).card_detect) | |
1591 | return -ENOSYS; | |
1592 | return mmc_slot(host).card_detect(host->dev, host->slot_id); | |
1593 | } | |
1594 | ||
1595 | static int omap_hsmmc_get_ro(struct mmc_host *mmc) | |
1596 | { | |
1597 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1598 | ||
1599 | if (!mmc_slot(host).get_ro) | |
1600 | return -ENOSYS; | |
1601 | return mmc_slot(host).get_ro(host->dev, 0); | |
1602 | } | |
1603 | ||
1604 | static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) | |
1605 | { | |
1606 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1607 | ||
1608 | if (mmc_slot(host).init_card) | |
1609 | mmc_slot(host).init_card(card); | |
1610 | } | |
1611 | ||
1612 | static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) | |
1613 | { | |
1614 | u32 hctl, capa, value; | |
1615 | ||
1616 | /* Only MMC1 supports 3.0V */ | |
1617 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { | |
1618 | hctl = SDVS30; | |
1619 | capa = VS30 | VS18; | |
1620 | } else { | |
1621 | hctl = SDVS18; | |
1622 | capa = VS18; | |
1623 | } | |
1624 | ||
1625 | value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK; | |
1626 | OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl); | |
1627 | ||
1628 | value = OMAP_HSMMC_READ(host->base, CAPA); | |
1629 | OMAP_HSMMC_WRITE(host->base, CAPA, value | capa); | |
1630 | ||
1631 | /* Set the controller to AUTO IDLE mode */ | |
1632 | value = OMAP_HSMMC_READ(host->base, SYSCONFIG); | |
1633 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE); | |
1634 | ||
1635 | /* Set SD bus power bit */ | |
1636 | set_sd_bus_power(host); | |
1637 | } | |
1638 | ||
1639 | static int omap_hsmmc_enable_fclk(struct mmc_host *mmc) | |
1640 | { | |
1641 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1642 | ||
1643 | pm_runtime_get_sync(host->dev); | |
1644 | ||
1645 | return 0; | |
1646 | } | |
1647 | ||
1648 | static int omap_hsmmc_disable_fclk(struct mmc_host *mmc, int lazy) | |
1649 | { | |
1650 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1651 | ||
1652 | pm_runtime_mark_last_busy(host->dev); | |
1653 | pm_runtime_put_autosuspend(host->dev); | |
1654 | ||
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | static const struct mmc_host_ops omap_hsmmc_ops = { | |
1659 | .enable = omap_hsmmc_enable_fclk, | |
1660 | .disable = omap_hsmmc_disable_fclk, | |
1661 | .post_req = omap_hsmmc_post_req, | |
1662 | .pre_req = omap_hsmmc_pre_req, | |
1663 | .request = omap_hsmmc_request, | |
1664 | .set_ios = omap_hsmmc_set_ios, | |
1665 | .get_cd = omap_hsmmc_get_cd, | |
1666 | .get_ro = omap_hsmmc_get_ro, | |
1667 | .init_card = omap_hsmmc_init_card, | |
1668 | /* NYET -- enable_sdio_irq */ | |
1669 | }; | |
1670 | ||
1671 | #ifdef CONFIG_DEBUG_FS | |
1672 | ||
1673 | static int omap_hsmmc_regs_show(struct seq_file *s, void *data) | |
1674 | { | |
1675 | struct mmc_host *mmc = s->private; | |
1676 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1677 | int context_loss = 0; | |
1678 | ||
1679 | if (host->pdata->get_context_loss_count) | |
1680 | context_loss = host->pdata->get_context_loss_count(host->dev); | |
1681 | ||
1682 | seq_printf(s, "mmc%d:\n" | |
1683 | " enabled:\t%d\n" | |
1684 | " dpm_state:\t%d\n" | |
1685 | " nesting_cnt:\t%d\n" | |
1686 | " ctx_loss:\t%d:%d\n" | |
1687 | "\nregs:\n", | |
1688 | mmc->index, mmc->enabled ? 1 : 0, | |
1689 | host->dpm_state, mmc->nesting_cnt, | |
1690 | host->context_loss, context_loss); | |
1691 | ||
1692 | if (host->suspended) { | |
1693 | seq_printf(s, "host suspended, can't read registers\n"); | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | pm_runtime_get_sync(host->dev); | |
1698 | ||
1699 | seq_printf(s, "SYSCONFIG:\t0x%08x\n", | |
1700 | OMAP_HSMMC_READ(host->base, SYSCONFIG)); | |
1701 | seq_printf(s, "CON:\t\t0x%08x\n", | |
1702 | OMAP_HSMMC_READ(host->base, CON)); | |
1703 | seq_printf(s, "HCTL:\t\t0x%08x\n", | |
1704 | OMAP_HSMMC_READ(host->base, HCTL)); | |
1705 | seq_printf(s, "SYSCTL:\t\t0x%08x\n", | |
1706 | OMAP_HSMMC_READ(host->base, SYSCTL)); | |
1707 | seq_printf(s, "IE:\t\t0x%08x\n", | |
1708 | OMAP_HSMMC_READ(host->base, IE)); | |
1709 | seq_printf(s, "ISE:\t\t0x%08x\n", | |
1710 | OMAP_HSMMC_READ(host->base, ISE)); | |
1711 | seq_printf(s, "CAPA:\t\t0x%08x\n", | |
1712 | OMAP_HSMMC_READ(host->base, CAPA)); | |
1713 | ||
1714 | pm_runtime_mark_last_busy(host->dev); | |
1715 | pm_runtime_put_autosuspend(host->dev); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | static int omap_hsmmc_regs_open(struct inode *inode, struct file *file) | |
1721 | { | |
1722 | return single_open(file, omap_hsmmc_regs_show, inode->i_private); | |
1723 | } | |
1724 | ||
1725 | static const struct file_operations mmc_regs_fops = { | |
1726 | .open = omap_hsmmc_regs_open, | |
1727 | .read = seq_read, | |
1728 | .llseek = seq_lseek, | |
1729 | .release = single_release, | |
1730 | }; | |
1731 | ||
1732 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) | |
1733 | { | |
1734 | if (mmc->debugfs_root) | |
1735 | debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root, | |
1736 | mmc, &mmc_regs_fops); | |
1737 | } | |
1738 | ||
1739 | #else | |
1740 | ||
1741 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) | |
1742 | { | |
1743 | } | |
1744 | ||
1745 | #endif | |
1746 | ||
1747 | static int __init omap_hsmmc_probe(struct platform_device *pdev) | |
1748 | { | |
1749 | struct omap_mmc_platform_data *pdata = pdev->dev.platform_data; | |
1750 | struct mmc_host *mmc; | |
1751 | struct omap_hsmmc_host *host = NULL; | |
1752 | struct resource *res; | |
1753 | int ret, irq; | |
1754 | ||
1755 | if (pdata == NULL) { | |
1756 | dev_err(&pdev->dev, "Platform Data is missing\n"); | |
1757 | return -ENXIO; | |
1758 | } | |
1759 | ||
1760 | if (pdata->nr_slots == 0) { | |
1761 | dev_err(&pdev->dev, "No Slots\n"); | |
1762 | return -ENXIO; | |
1763 | } | |
1764 | ||
1765 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1766 | irq = platform_get_irq(pdev, 0); | |
1767 | if (res == NULL || irq < 0) | |
1768 | return -ENXIO; | |
1769 | ||
1770 | res->start += pdata->reg_offset; | |
1771 | res->end += pdata->reg_offset; | |
1772 | res = request_mem_region(res->start, resource_size(res), pdev->name); | |
1773 | if (res == NULL) | |
1774 | return -EBUSY; | |
1775 | ||
1776 | ret = omap_hsmmc_gpio_init(pdata); | |
1777 | if (ret) | |
1778 | goto err; | |
1779 | ||
1780 | mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); | |
1781 | if (!mmc) { | |
1782 | ret = -ENOMEM; | |
1783 | goto err_alloc; | |
1784 | } | |
1785 | ||
1786 | host = mmc_priv(mmc); | |
1787 | host->mmc = mmc; | |
1788 | host->pdata = pdata; | |
1789 | host->dev = &pdev->dev; | |
1790 | host->use_dma = 1; | |
1791 | host->dev->dma_mask = &pdata->dma_mask; | |
1792 | host->dma_ch = -1; | |
1793 | host->irq = irq; | |
1794 | host->id = pdev->id; | |
1795 | host->slot_id = 0; | |
1796 | host->mapbase = res->start; | |
1797 | host->base = ioremap(host->mapbase, SZ_4K); | |
1798 | host->power_mode = MMC_POWER_OFF; | |
1799 | host->next_data.cookie = 1; | |
1800 | ||
1801 | platform_set_drvdata(pdev, host); | |
1802 | ||
1803 | mmc->ops = &omap_hsmmc_ops; | |
1804 | ||
1805 | /* | |
1806 | * If regulator_disable can only put vcc_aux to sleep then there is | |
1807 | * no off state. | |
1808 | */ | |
1809 | if (mmc_slot(host).vcc_aux_disable_is_sleep) | |
1810 | mmc_slot(host).no_off = 1; | |
1811 | ||
1812 | mmc->f_min = OMAP_MMC_MIN_CLOCK; | |
1813 | ||
1814 | if (pdata->max_freq > 0) | |
1815 | mmc->f_max = pdata->max_freq; | |
1816 | else | |
1817 | mmc->f_max = OMAP_MMC_MAX_CLOCK; | |
1818 | ||
1819 | spin_lock_init(&host->irq_lock); | |
1820 | ||
1821 | host->fclk = clk_get(&pdev->dev, "fck"); | |
1822 | if (IS_ERR(host->fclk)) { | |
1823 | ret = PTR_ERR(host->fclk); | |
1824 | host->fclk = NULL; | |
1825 | goto err1; | |
1826 | } | |
1827 | ||
1828 | omap_hsmmc_context_save(host); | |
1829 | ||
1830 | mmc->caps |= MMC_CAP_DISABLE; | |
1831 | if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) { | |
1832 | dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n"); | |
1833 | mmc->caps2 |= MMC_CAP2_NO_MULTI_READ; | |
1834 | } | |
1835 | ||
1836 | pm_runtime_enable(host->dev); | |
1837 | pm_runtime_get_sync(host->dev); | |
1838 | pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY); | |
1839 | pm_runtime_use_autosuspend(host->dev); | |
1840 | ||
1841 | if (cpu_is_omap2430()) { | |
1842 | host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); | |
1843 | /* | |
1844 | * MMC can still work without debounce clock. | |
1845 | */ | |
1846 | if (IS_ERR(host->dbclk)) | |
1847 | dev_warn(mmc_dev(host->mmc), | |
1848 | "Failed to get debounce clock\n"); | |
1849 | else | |
1850 | host->got_dbclk = 1; | |
1851 | ||
1852 | if (host->got_dbclk) | |
1853 | if (clk_enable(host->dbclk) != 0) | |
1854 | dev_dbg(mmc_dev(host->mmc), "Enabling debounce" | |
1855 | " clk failed\n"); | |
1856 | } | |
1857 | ||
1858 | /* Since we do only SG emulation, we can have as many segs | |
1859 | * as we want. */ | |
1860 | mmc->max_segs = 1024; | |
1861 | ||
1862 | mmc->max_blk_size = 512; /* Block Length at max can be 1024 */ | |
1863 | mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */ | |
1864 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
1865 | mmc->max_seg_size = mmc->max_req_size; | |
1866 | ||
1867 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | | |
1868 | MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE; | |
1869 | ||
1870 | mmc->caps |= mmc_slot(host).caps; | |
1871 | if (mmc->caps & MMC_CAP_8_BIT_DATA) | |
1872 | mmc->caps |= MMC_CAP_4_BIT_DATA; | |
1873 | ||
1874 | if (mmc_slot(host).nonremovable) | |
1875 | mmc->caps |= MMC_CAP_NONREMOVABLE; | |
1876 | ||
1877 | mmc->pm_caps = mmc_slot(host).pm_caps; | |
1878 | ||
1879 | omap_hsmmc_conf_bus_power(host); | |
1880 | ||
1881 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); | |
1882 | if (!res) { | |
1883 | dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); | |
1884 | goto err_irq; | |
1885 | } | |
1886 | host->dma_line_tx = res->start; | |
1887 | ||
1888 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); | |
1889 | if (!res) { | |
1890 | dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); | |
1891 | goto err_irq; | |
1892 | } | |
1893 | host->dma_line_rx = res->start; | |
1894 | ||
1895 | /* Request IRQ for MMC operations */ | |
1896 | ret = request_irq(host->irq, omap_hsmmc_irq, 0, | |
1897 | mmc_hostname(mmc), host); | |
1898 | if (ret) { | |
1899 | dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n"); | |
1900 | goto err_irq; | |
1901 | } | |
1902 | ||
1903 | if (pdata->init != NULL) { | |
1904 | if (pdata->init(&pdev->dev) != 0) { | |
1905 | dev_dbg(mmc_dev(host->mmc), | |
1906 | "Unable to configure MMC IRQs\n"); | |
1907 | goto err_irq_cd_init; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) { | |
1912 | ret = omap_hsmmc_reg_get(host); | |
1913 | if (ret) | |
1914 | goto err_reg; | |
1915 | host->use_reg = 1; | |
1916 | } | |
1917 | ||
1918 | mmc->ocr_avail = mmc_slot(host).ocr_mask; | |
1919 | ||
1920 | /* Request IRQ for card detect */ | |
1921 | if ((mmc_slot(host).card_detect_irq)) { | |
1922 | ret = request_threaded_irq(mmc_slot(host).card_detect_irq, | |
1923 | NULL, | |
1924 | omap_hsmmc_detect, | |
1925 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
1926 | mmc_hostname(mmc), host); | |
1927 | if (ret) { | |
1928 | dev_dbg(mmc_dev(host->mmc), | |
1929 | "Unable to grab MMC CD IRQ\n"); | |
1930 | goto err_irq_cd; | |
1931 | } | |
1932 | pdata->suspend = omap_hsmmc_suspend_cdirq; | |
1933 | pdata->resume = omap_hsmmc_resume_cdirq; | |
1934 | } | |
1935 | ||
1936 | omap_hsmmc_disable_irq(host); | |
1937 | ||
1938 | omap_hsmmc_protect_card(host); | |
1939 | ||
1940 | mmc_add_host(mmc); | |
1941 | ||
1942 | if (mmc_slot(host).name != NULL) { | |
1943 | ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); | |
1944 | if (ret < 0) | |
1945 | goto err_slot_name; | |
1946 | } | |
1947 | if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) { | |
1948 | ret = device_create_file(&mmc->class_dev, | |
1949 | &dev_attr_cover_switch); | |
1950 | if (ret < 0) | |
1951 | goto err_slot_name; | |
1952 | } | |
1953 | ||
1954 | omap_hsmmc_debugfs(mmc); | |
1955 | pm_runtime_mark_last_busy(host->dev); | |
1956 | pm_runtime_put_autosuspend(host->dev); | |
1957 | ||
1958 | return 0; | |
1959 | ||
1960 | err_slot_name: | |
1961 | mmc_remove_host(mmc); | |
1962 | free_irq(mmc_slot(host).card_detect_irq, host); | |
1963 | err_irq_cd: | |
1964 | if (host->use_reg) | |
1965 | omap_hsmmc_reg_put(host); | |
1966 | err_reg: | |
1967 | if (host->pdata->cleanup) | |
1968 | host->pdata->cleanup(&pdev->dev); | |
1969 | err_irq_cd_init: | |
1970 | free_irq(host->irq, host); | |
1971 | err_irq: | |
1972 | pm_runtime_mark_last_busy(host->dev); | |
1973 | pm_runtime_put_autosuspend(host->dev); | |
1974 | clk_put(host->fclk); | |
1975 | if (host->got_dbclk) { | |
1976 | clk_disable(host->dbclk); | |
1977 | clk_put(host->dbclk); | |
1978 | } | |
1979 | err1: | |
1980 | iounmap(host->base); | |
1981 | platform_set_drvdata(pdev, NULL); | |
1982 | mmc_free_host(mmc); | |
1983 | err_alloc: | |
1984 | omap_hsmmc_gpio_free(pdata); | |
1985 | err: | |
1986 | release_mem_region(res->start, resource_size(res)); | |
1987 | return ret; | |
1988 | } | |
1989 | ||
1990 | static int omap_hsmmc_remove(struct platform_device *pdev) | |
1991 | { | |
1992 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); | |
1993 | struct resource *res; | |
1994 | ||
1995 | if (host) { | |
1996 | pm_runtime_get_sync(host->dev); | |
1997 | mmc_remove_host(host->mmc); | |
1998 | if (host->use_reg) | |
1999 | omap_hsmmc_reg_put(host); | |
2000 | if (host->pdata->cleanup) | |
2001 | host->pdata->cleanup(&pdev->dev); | |
2002 | free_irq(host->irq, host); | |
2003 | if (mmc_slot(host).card_detect_irq) | |
2004 | free_irq(mmc_slot(host).card_detect_irq, host); | |
2005 | ||
2006 | pm_runtime_put_sync(host->dev); | |
2007 | pm_runtime_disable(host->dev); | |
2008 | clk_put(host->fclk); | |
2009 | if (host->got_dbclk) { | |
2010 | clk_disable(host->dbclk); | |
2011 | clk_put(host->dbclk); | |
2012 | } | |
2013 | ||
2014 | mmc_free_host(host->mmc); | |
2015 | iounmap(host->base); | |
2016 | omap_hsmmc_gpio_free(pdev->dev.platform_data); | |
2017 | } | |
2018 | ||
2019 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2020 | if (res) | |
2021 | release_mem_region(res->start, resource_size(res)); | |
2022 | platform_set_drvdata(pdev, NULL); | |
2023 | ||
2024 | return 0; | |
2025 | } | |
2026 | ||
2027 | #ifdef CONFIG_PM | |
2028 | static int omap_hsmmc_suspend(struct device *dev) | |
2029 | { | |
2030 | int ret = 0; | |
2031 | struct platform_device *pdev = to_platform_device(dev); | |
2032 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); | |
2033 | ||
2034 | if (host && host->suspended) | |
2035 | return 0; | |
2036 | ||
2037 | if (host) { | |
2038 | pm_runtime_get_sync(host->dev); | |
2039 | host->suspended = 1; | |
2040 | if (host->pdata->suspend) { | |
2041 | ret = host->pdata->suspend(&pdev->dev, | |
2042 | host->slot_id); | |
2043 | if (ret) { | |
2044 | dev_dbg(mmc_dev(host->mmc), | |
2045 | "Unable to handle MMC board" | |
2046 | " level suspend\n"); | |
2047 | host->suspended = 0; | |
2048 | return ret; | |
2049 | } | |
2050 | } | |
2051 | ret = mmc_suspend_host(host->mmc); | |
2052 | ||
2053 | if (ret) { | |
2054 | host->suspended = 0; | |
2055 | if (host->pdata->resume) { | |
2056 | ret = host->pdata->resume(&pdev->dev, | |
2057 | host->slot_id); | |
2058 | if (ret) | |
2059 | dev_dbg(mmc_dev(host->mmc), | |
2060 | "Unmask interrupt failed\n"); | |
2061 | } | |
2062 | goto err; | |
2063 | } | |
2064 | ||
2065 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) { | |
2066 | omap_hsmmc_disable_irq(host); | |
2067 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
2068 | OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); | |
2069 | } | |
2070 | if (host->got_dbclk) | |
2071 | clk_disable(host->dbclk); | |
2072 | ||
2073 | } | |
2074 | err: | |
2075 | pm_runtime_put_sync(host->dev); | |
2076 | return ret; | |
2077 | } | |
2078 | ||
2079 | /* Routine to resume the MMC device */ | |
2080 | static int omap_hsmmc_resume(struct device *dev) | |
2081 | { | |
2082 | int ret = 0; | |
2083 | struct platform_device *pdev = to_platform_device(dev); | |
2084 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); | |
2085 | ||
2086 | if (host && !host->suspended) | |
2087 | return 0; | |
2088 | ||
2089 | if (host) { | |
2090 | pm_runtime_get_sync(host->dev); | |
2091 | ||
2092 | if (host->got_dbclk) | |
2093 | clk_enable(host->dbclk); | |
2094 | ||
2095 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) | |
2096 | omap_hsmmc_conf_bus_power(host); | |
2097 | ||
2098 | if (host->pdata->resume) { | |
2099 | ret = host->pdata->resume(&pdev->dev, host->slot_id); | |
2100 | if (ret) | |
2101 | dev_dbg(mmc_dev(host->mmc), | |
2102 | "Unmask interrupt failed\n"); | |
2103 | } | |
2104 | ||
2105 | omap_hsmmc_protect_card(host); | |
2106 | ||
2107 | /* Notify the core to resume the host */ | |
2108 | ret = mmc_resume_host(host->mmc); | |
2109 | if (ret == 0) | |
2110 | host->suspended = 0; | |
2111 | ||
2112 | pm_runtime_mark_last_busy(host->dev); | |
2113 | pm_runtime_put_autosuspend(host->dev); | |
2114 | } | |
2115 | ||
2116 | return ret; | |
2117 | ||
2118 | } | |
2119 | ||
2120 | #else | |
2121 | #define omap_hsmmc_suspend NULL | |
2122 | #define omap_hsmmc_resume NULL | |
2123 | #endif | |
2124 | ||
2125 | static int omap_hsmmc_runtime_suspend(struct device *dev) | |
2126 | { | |
2127 | struct omap_hsmmc_host *host; | |
2128 | ||
2129 | host = platform_get_drvdata(to_platform_device(dev)); | |
2130 | omap_hsmmc_context_save(host); | |
2131 | dev_dbg(mmc_dev(host->mmc), "disabled\n"); | |
2132 | ||
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | static int omap_hsmmc_runtime_resume(struct device *dev) | |
2137 | { | |
2138 | struct omap_hsmmc_host *host; | |
2139 | ||
2140 | host = platform_get_drvdata(to_platform_device(dev)); | |
2141 | omap_hsmmc_context_restore(host); | |
2142 | dev_dbg(mmc_dev(host->mmc), "enabled\n"); | |
2143 | ||
2144 | return 0; | |
2145 | } | |
2146 | ||
2147 | static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { | |
2148 | .suspend = omap_hsmmc_suspend, | |
2149 | .resume = omap_hsmmc_resume, | |
2150 | .runtime_suspend = omap_hsmmc_runtime_suspend, | |
2151 | .runtime_resume = omap_hsmmc_runtime_resume, | |
2152 | }; | |
2153 | ||
2154 | static struct platform_driver omap_hsmmc_driver = { | |
2155 | .remove = omap_hsmmc_remove, | |
2156 | .driver = { | |
2157 | .name = DRIVER_NAME, | |
2158 | .owner = THIS_MODULE, | |
2159 | .pm = &omap_hsmmc_dev_pm_ops, | |
2160 | }, | |
2161 | }; | |
2162 | ||
2163 | static int __init omap_hsmmc_init(void) | |
2164 | { | |
2165 | /* Register the MMC driver */ | |
2166 | return platform_driver_probe(&omap_hsmmc_driver, omap_hsmmc_probe); | |
2167 | } | |
2168 | ||
2169 | static void __exit omap_hsmmc_cleanup(void) | |
2170 | { | |
2171 | /* Unregister MMC driver */ | |
2172 | platform_driver_unregister(&omap_hsmmc_driver); | |
2173 | } | |
2174 | ||
2175 | module_init(omap_hsmmc_init); | |
2176 | module_exit(omap_hsmmc_cleanup); | |
2177 | ||
2178 | MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver"); | |
2179 | MODULE_LICENSE("GPL"); | |
2180 | MODULE_ALIAS("platform:" DRIVER_NAME); | |
2181 | MODULE_AUTHOR("Texas Instruments Inc"); |