Commit | Line | Data |
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a45c6cb8 MC |
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> | |
ac330f44 | 20 | #include <linux/kernel.h> |
d900f712 DK |
21 | #include <linux/debugfs.h> |
22 | #include <linux/seq_file.h> | |
a45c6cb8 MC |
23 | #include <linux/interrupt.h> |
24 | #include <linux/delay.h> | |
25 | #include <linux/dma-mapping.h> | |
26 | #include <linux/platform_device.h> | |
a45c6cb8 MC |
27 | #include <linux/timer.h> |
28 | #include <linux/clk.h> | |
46856a68 RN |
29 | #include <linux/of.h> |
30 | #include <linux/of_gpio.h> | |
31 | #include <linux/of_device.h> | |
a45c6cb8 | 32 | #include <linux/mmc/host.h> |
13189e78 | 33 | #include <linux/mmc/core.h> |
93caf8e6 | 34 | #include <linux/mmc/mmc.h> |
a45c6cb8 MC |
35 | #include <linux/io.h> |
36 | #include <linux/semaphore.h> | |
db0fefc5 AH |
37 | #include <linux/gpio.h> |
38 | #include <linux/regulator/consumer.h> | |
fa4aa2d4 | 39 | #include <linux/pm_runtime.h> |
ce491cf8 | 40 | #include <plat/dma.h> |
a45c6cb8 | 41 | #include <mach/hardware.h> |
ce491cf8 TL |
42 | #include <plat/board.h> |
43 | #include <plat/mmc.h> | |
44 | #include <plat/cpu.h> | |
a45c6cb8 MC |
45 | |
46 | /* OMAP HSMMC Host Controller Registers */ | |
47 | #define OMAP_HSMMC_SYSCONFIG 0x0010 | |
11dd62a7 | 48 | #define OMAP_HSMMC_SYSSTATUS 0x0014 |
a45c6cb8 MC |
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) | |
eb250826 | 69 | #define SDVS33 (0x7 << 9) |
1b331e69 | 70 | #define SDVS_MASK 0x00000E00 |
a45c6cb8 MC |
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 | |
ccdfe3a6 AG |
84 | #define BWR_ENABLE (1 << 4) |
85 | #define BRR_ENABLE (1 << 5) | |
93caf8e6 | 86 | #define DTO_ENABLE (1 << 20) |
a45c6cb8 | 87 | #define INIT_STREAM (1 << 1) |
dba3c29e | 88 | #define ACEN_ACMD12 (1 << 2) |
a45c6cb8 MC |
89 | #define DP_SELECT (1 << 21) |
90 | #define DDIR (1 << 4) | |
91 | #define DMA_EN 0x1 | |
92 | #define MSBS (1 << 5) | |
93 | #define BCE (1 << 1) | |
94 | #define FOUR_BIT (1 << 1) | |
03b5d924 | 95 | #define DDR (1 << 19) |
73153010 | 96 | #define DW8 (1 << 5) |
a45c6cb8 MC |
97 | #define CC 0x1 |
98 | #define TC 0x02 | |
99 | #define OD 0x1 | |
100 | #define ERR (1 << 15) | |
101 | #define CMD_TIMEOUT (1 << 16) | |
102 | #define DATA_TIMEOUT (1 << 20) | |
103 | #define CMD_CRC (1 << 17) | |
104 | #define DATA_CRC (1 << 21) | |
105 | #define CARD_ERR (1 << 28) | |
106 | #define STAT_CLEAR 0xFFFFFFFF | |
107 | #define INIT_STREAM_CMD 0x00000000 | |
108 | #define DUAL_VOLT_OCR_BIT 7 | |
109 | #define SRC (1 << 25) | |
110 | #define SRD (1 << 26) | |
11dd62a7 DK |
111 | #define SOFTRESET (1 << 1) |
112 | #define RESETDONE (1 << 0) | |
a45c6cb8 | 113 | |
fa4aa2d4 | 114 | #define MMC_AUTOSUSPEND_DELAY 100 |
a45c6cb8 | 115 | #define MMC_TIMEOUT_MS 20 |
6b206efe AS |
116 | #define OMAP_MMC_MIN_CLOCK 400000 |
117 | #define OMAP_MMC_MAX_CLOCK 52000000 | |
0005ae73 | 118 | #define DRIVER_NAME "omap_hsmmc" |
a45c6cb8 | 119 | |
dba3c29e | 120 | #define AUTO_CMD12 (1 << 0) /* Auto CMD12 support */ |
a45c6cb8 MC |
121 | /* |
122 | * One controller can have multiple slots, like on some omap boards using | |
123 | * omap.c controller driver. Luckily this is not currently done on any known | |
124 | * omap_hsmmc.c device. | |
125 | */ | |
126 | #define mmc_slot(host) (host->pdata->slots[host->slot_id]) | |
127 | ||
128 | /* | |
129 | * MMC Host controller read/write API's | |
130 | */ | |
131 | #define OMAP_HSMMC_READ(base, reg) \ | |
132 | __raw_readl((base) + OMAP_HSMMC_##reg) | |
133 | ||
134 | #define OMAP_HSMMC_WRITE(base, reg, val) \ | |
135 | __raw_writel((val), (base) + OMAP_HSMMC_##reg) | |
136 | ||
9782aff8 PF |
137 | struct omap_hsmmc_next { |
138 | unsigned int dma_len; | |
139 | s32 cookie; | |
140 | }; | |
141 | ||
70a3341a | 142 | struct omap_hsmmc_host { |
a45c6cb8 MC |
143 | struct device *dev; |
144 | struct mmc_host *mmc; | |
145 | struct mmc_request *mrq; | |
146 | struct mmc_command *cmd; | |
147 | struct mmc_data *data; | |
148 | struct clk *fclk; | |
a45c6cb8 | 149 | struct clk *dbclk; |
db0fefc5 AH |
150 | /* |
151 | * vcc == configured supply | |
152 | * vcc_aux == optional | |
153 | * - MMC1, supply for DAT4..DAT7 | |
154 | * - MMC2/MMC2, external level shifter voltage supply, for | |
155 | * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) | |
156 | */ | |
157 | struct regulator *vcc; | |
158 | struct regulator *vcc_aux; | |
a45c6cb8 MC |
159 | void __iomem *base; |
160 | resource_size_t mapbase; | |
4dffd7a2 | 161 | spinlock_t irq_lock; /* Prevent races with irq handler */ |
a45c6cb8 | 162 | unsigned int dma_len; |
0ccd76d4 | 163 | unsigned int dma_sg_idx; |
a45c6cb8 | 164 | unsigned char bus_mode; |
a3621465 | 165 | unsigned char power_mode; |
a45c6cb8 MC |
166 | u32 *buffer; |
167 | u32 bytesleft; | |
168 | int suspended; | |
169 | int irq; | |
a45c6cb8 | 170 | int use_dma, dma_ch; |
f3e2f1dd | 171 | int dma_line_tx, dma_line_rx; |
a45c6cb8 | 172 | int slot_id; |
4a694dc9 | 173 | int response_busy; |
11dd62a7 | 174 | int context_loss; |
623821f7 | 175 | int vdd; |
b62f6228 AH |
176 | int protect_card; |
177 | int reqs_blocked; | |
db0fefc5 | 178 | int use_reg; |
b417577d | 179 | int req_in_progress; |
dba3c29e | 180 | unsigned int flags; |
9782aff8 | 181 | struct omap_hsmmc_next next_data; |
11dd62a7 | 182 | |
a45c6cb8 MC |
183 | struct omap_mmc_platform_data *pdata; |
184 | }; | |
185 | ||
db0fefc5 AH |
186 | static int omap_hsmmc_card_detect(struct device *dev, int slot) |
187 | { | |
188 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
189 | ||
190 | /* NOTE: assumes card detect signal is active-low */ | |
191 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
192 | } | |
193 | ||
194 | static int omap_hsmmc_get_wp(struct device *dev, int slot) | |
195 | { | |
196 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
197 | ||
198 | /* NOTE: assumes write protect signal is active-high */ | |
199 | return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); | |
200 | } | |
201 | ||
202 | static int omap_hsmmc_get_cover_state(struct device *dev, int slot) | |
203 | { | |
204 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
205 | ||
206 | /* NOTE: assumes card detect signal is active-low */ | |
207 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
208 | } | |
209 | ||
210 | #ifdef CONFIG_PM | |
211 | ||
212 | static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot) | |
213 | { | |
214 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
215 | ||
216 | disable_irq(mmc->slots[0].card_detect_irq); | |
217 | return 0; | |
218 | } | |
219 | ||
220 | static int omap_hsmmc_resume_cdirq(struct device *dev, int slot) | |
221 | { | |
222 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
223 | ||
224 | enable_irq(mmc->slots[0].card_detect_irq); | |
225 | return 0; | |
226 | } | |
227 | ||
228 | #else | |
229 | ||
230 | #define omap_hsmmc_suspend_cdirq NULL | |
231 | #define omap_hsmmc_resume_cdirq NULL | |
232 | ||
233 | #endif | |
234 | ||
b702b106 AH |
235 | #ifdef CONFIG_REGULATOR |
236 | ||
69b07ece | 237 | static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, |
db0fefc5 AH |
238 | int vdd) |
239 | { | |
240 | struct omap_hsmmc_host *host = | |
241 | platform_get_drvdata(to_platform_device(dev)); | |
242 | int ret = 0; | |
243 | ||
244 | /* | |
245 | * If we don't see a Vcc regulator, assume it's a fixed | |
246 | * voltage always-on regulator. | |
247 | */ | |
248 | if (!host->vcc) | |
249 | return 0; | |
1f84b71b RN |
250 | /* |
251 | * With DT, never turn OFF the regulator. This is because | |
252 | * the pbias cell programming support is still missing when | |
253 | * booting with Device tree | |
254 | */ | |
4d048f91 | 255 | if (dev->of_node && !vdd) |
1f84b71b | 256 | return 0; |
db0fefc5 AH |
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) { | |
99fc5131 | 275 | ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); |
db0fefc5 AH |
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) | |
99fc5131 LW |
280 | ret = mmc_regulator_set_ocr(host->mmc, |
281 | host->vcc, 0); | |
db0fefc5 AH |
282 | } |
283 | } else { | |
99fc5131 | 284 | /* Shut down the rail */ |
6da20c89 AH |
285 | if (host->vcc_aux) |
286 | ret = regulator_disable(host->vcc_aux); | |
99fc5131 LW |
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 | } | |
db0fefc5 AH |
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 | ||
db0fefc5 AH |
300 | static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) |
301 | { | |
302 | struct regulator *reg; | |
64be9782 | 303 | int ocr_value = 0; |
db0fefc5 | 304 | |
1cb9af49 | 305 | mmc_slot(host).set_power = omap_hsmmc_set_power; |
db0fefc5 AH |
306 | |
307 | reg = regulator_get(host->dev, "vmmc"); | |
308 | if (IS_ERR(reg)) { | |
309 | dev_dbg(host->dev, "vmmc regulator missing\n"); | |
db0fefc5 AH |
310 | } else { |
311 | host->vcc = reg; | |
64be9782 | 312 | ocr_value = mmc_regulator_get_ocrmask(reg); |
313 | if (!mmc_slot(host).ocr_mask) { | |
314 | mmc_slot(host).ocr_mask = ocr_value; | |
315 | } else { | |
316 | if (!(mmc_slot(host).ocr_mask & ocr_value)) { | |
2cecdf00 | 317 | dev_err(host->dev, "ocrmask %x is not supported\n", |
e3f1adb6 | 318 | mmc_slot(host).ocr_mask); |
64be9782 | 319 | mmc_slot(host).ocr_mask = 0; |
320 | return -EINVAL; | |
321 | } | |
322 | } | |
db0fefc5 AH |
323 | |
324 | /* Allow an aux regulator */ | |
325 | reg = regulator_get(host->dev, "vmmc_aux"); | |
326 | host->vcc_aux = IS_ERR(reg) ? NULL : reg; | |
327 | ||
b1c1df7a B |
328 | /* For eMMC do not power off when not in sleep state */ |
329 | if (mmc_slot(host).no_regulator_off_init) | |
330 | return 0; | |
db0fefc5 AH |
331 | /* |
332 | * UGLY HACK: workaround regulator framework bugs. | |
333 | * When the bootloader leaves a supply active, it's | |
334 | * initialized with zero usecount ... and we can't | |
335 | * disable it without first enabling it. Until the | |
336 | * framework is fixed, we need a workaround like this | |
337 | * (which is safe for MMC, but not in general). | |
338 | */ | |
e840ce13 AH |
339 | if (regulator_is_enabled(host->vcc) > 0 || |
340 | (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) { | |
341 | int vdd = ffs(mmc_slot(host).ocr_mask) - 1; | |
342 | ||
343 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
344 | 1, vdd); | |
345 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
346 | 0, 0); | |
db0fefc5 AH |
347 | } |
348 | } | |
349 | ||
350 | return 0; | |
db0fefc5 AH |
351 | } |
352 | ||
353 | static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
354 | { | |
355 | regulator_put(host->vcc); | |
356 | regulator_put(host->vcc_aux); | |
357 | mmc_slot(host).set_power = NULL; | |
db0fefc5 AH |
358 | } |
359 | ||
b702b106 AH |
360 | static inline int omap_hsmmc_have_reg(void) |
361 | { | |
362 | return 1; | |
363 | } | |
364 | ||
365 | #else | |
366 | ||
367 | static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) | |
368 | { | |
369 | return -EINVAL; | |
370 | } | |
371 | ||
372 | static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
373 | { | |
374 | } | |
375 | ||
376 | static inline int omap_hsmmc_have_reg(void) | |
377 | { | |
378 | return 0; | |
379 | } | |
380 | ||
381 | #endif | |
382 | ||
383 | static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) | |
384 | { | |
385 | int ret; | |
386 | ||
387 | if (gpio_is_valid(pdata->slots[0].switch_pin)) { | |
b702b106 AH |
388 | if (pdata->slots[0].cover) |
389 | pdata->slots[0].get_cover_state = | |
390 | omap_hsmmc_get_cover_state; | |
391 | else | |
392 | pdata->slots[0].card_detect = omap_hsmmc_card_detect; | |
393 | pdata->slots[0].card_detect_irq = | |
394 | gpio_to_irq(pdata->slots[0].switch_pin); | |
395 | ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd"); | |
396 | if (ret) | |
397 | return ret; | |
398 | ret = gpio_direction_input(pdata->slots[0].switch_pin); | |
399 | if (ret) | |
400 | goto err_free_sp; | |
401 | } else | |
402 | pdata->slots[0].switch_pin = -EINVAL; | |
403 | ||
404 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) { | |
405 | pdata->slots[0].get_ro = omap_hsmmc_get_wp; | |
406 | ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp"); | |
407 | if (ret) | |
408 | goto err_free_cd; | |
409 | ret = gpio_direction_input(pdata->slots[0].gpio_wp); | |
410 | if (ret) | |
411 | goto err_free_wp; | |
412 | } else | |
413 | pdata->slots[0].gpio_wp = -EINVAL; | |
414 | ||
415 | return 0; | |
416 | ||
417 | err_free_wp: | |
418 | gpio_free(pdata->slots[0].gpio_wp); | |
419 | err_free_cd: | |
420 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
421 | err_free_sp: | |
422 | gpio_free(pdata->slots[0].switch_pin); | |
423 | return ret; | |
424 | } | |
425 | ||
426 | static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) | |
427 | { | |
428 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) | |
429 | gpio_free(pdata->slots[0].gpio_wp); | |
430 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
431 | gpio_free(pdata->slots[0].switch_pin); | |
432 | } | |
433 | ||
e0c7f99b AS |
434 | /* |
435 | * Start clock to the card | |
436 | */ | |
437 | static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host) | |
438 | { | |
439 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
440 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); | |
441 | } | |
442 | ||
a45c6cb8 MC |
443 | /* |
444 | * Stop clock to the card | |
445 | */ | |
70a3341a | 446 | static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
447 | { |
448 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
449 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); | |
450 | if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0) | |
451 | dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n"); | |
452 | } | |
453 | ||
93caf8e6 AH |
454 | static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, |
455 | struct mmc_command *cmd) | |
b417577d AH |
456 | { |
457 | unsigned int irq_mask; | |
458 | ||
459 | if (host->use_dma) | |
460 | irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE); | |
461 | else | |
462 | irq_mask = INT_EN_MASK; | |
463 | ||
93caf8e6 AH |
464 | /* Disable timeout for erases */ |
465 | if (cmd->opcode == MMC_ERASE) | |
466 | irq_mask &= ~DTO_ENABLE; | |
467 | ||
b417577d AH |
468 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
469 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
470 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); | |
471 | } | |
472 | ||
473 | static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) | |
474 | { | |
475 | OMAP_HSMMC_WRITE(host->base, ISE, 0); | |
476 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
477 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
478 | } | |
479 | ||
ac330f44 | 480 | /* Calculate divisor for the given clock frequency */ |
d83b6e03 | 481 | static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios) |
ac330f44 AS |
482 | { |
483 | u16 dsor = 0; | |
484 | ||
485 | if (ios->clock) { | |
d83b6e03 | 486 | dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock); |
ac330f44 AS |
487 | if (dsor > 250) |
488 | dsor = 250; | |
489 | } | |
490 | ||
491 | return dsor; | |
492 | } | |
493 | ||
5934df2f AS |
494 | static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host) |
495 | { | |
496 | struct mmc_ios *ios = &host->mmc->ios; | |
497 | unsigned long regval; | |
498 | unsigned long timeout; | |
499 | ||
500 | dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock); | |
501 | ||
502 | omap_hsmmc_stop_clock(host); | |
503 | ||
504 | regval = OMAP_HSMMC_READ(host->base, SYSCTL); | |
505 | regval = regval & ~(CLKD_MASK | DTO_MASK); | |
d83b6e03 | 506 | regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16); |
5934df2f AS |
507 | OMAP_HSMMC_WRITE(host->base, SYSCTL, regval); |
508 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
509 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); | |
510 | ||
511 | /* Wait till the ICS bit is set */ | |
512 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
513 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS | |
514 | && time_before(jiffies, timeout)) | |
515 | cpu_relax(); | |
516 | ||
517 | omap_hsmmc_start_clock(host); | |
518 | } | |
519 | ||
3796fb8a AS |
520 | static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host) |
521 | { | |
522 | struct mmc_ios *ios = &host->mmc->ios; | |
523 | u32 con; | |
524 | ||
525 | con = OMAP_HSMMC_READ(host->base, CON); | |
03b5d924 B |
526 | if (ios->timing == MMC_TIMING_UHS_DDR50) |
527 | con |= DDR; /* configure in DDR mode */ | |
528 | else | |
529 | con &= ~DDR; | |
3796fb8a AS |
530 | switch (ios->bus_width) { |
531 | case MMC_BUS_WIDTH_8: | |
532 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); | |
533 | break; | |
534 | case MMC_BUS_WIDTH_4: | |
535 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
536 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
537 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); | |
538 | break; | |
539 | case MMC_BUS_WIDTH_1: | |
540 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
541 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
542 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); | |
543 | break; | |
544 | } | |
545 | } | |
546 | ||
547 | static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host) | |
548 | { | |
549 | struct mmc_ios *ios = &host->mmc->ios; | |
550 | u32 con; | |
551 | ||
552 | con = OMAP_HSMMC_READ(host->base, CON); | |
553 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
554 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); | |
555 | else | |
556 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); | |
557 | } | |
558 | ||
11dd62a7 DK |
559 | #ifdef CONFIG_PM |
560 | ||
561 | /* | |
562 | * Restore the MMC host context, if it was lost as result of a | |
563 | * power state change. | |
564 | */ | |
70a3341a | 565 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
566 | { |
567 | struct mmc_ios *ios = &host->mmc->ios; | |
568 | struct omap_mmc_platform_data *pdata = host->pdata; | |
569 | int context_loss = 0; | |
3796fb8a | 570 | u32 hctl, capa; |
11dd62a7 DK |
571 | unsigned long timeout; |
572 | ||
573 | if (pdata->get_context_loss_count) { | |
574 | context_loss = pdata->get_context_loss_count(host->dev); | |
575 | if (context_loss < 0) | |
576 | return 1; | |
577 | } | |
578 | ||
579 | dev_dbg(mmc_dev(host->mmc), "context was %slost\n", | |
580 | context_loss == host->context_loss ? "not " : ""); | |
581 | if (host->context_loss == context_loss) | |
582 | return 1; | |
583 | ||
584 | /* Wait for hardware reset */ | |
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 | /* Do software reset */ | |
591 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET); | |
592 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
593 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE | |
594 | && time_before(jiffies, timeout)) | |
595 | ; | |
596 | ||
597 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, | |
598 | OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE); | |
599 | ||
c2200efb | 600 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
11dd62a7 DK |
601 | if (host->power_mode != MMC_POWER_OFF && |
602 | (1 << ios->vdd) <= MMC_VDD_23_24) | |
603 | hctl = SDVS18; | |
604 | else | |
605 | hctl = SDVS30; | |
606 | capa = VS30 | VS18; | |
607 | } else { | |
608 | hctl = SDVS18; | |
609 | capa = VS18; | |
610 | } | |
611 | ||
612 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
613 | OMAP_HSMMC_READ(host->base, HCTL) | hctl); | |
614 | ||
615 | OMAP_HSMMC_WRITE(host->base, CAPA, | |
616 | OMAP_HSMMC_READ(host->base, CAPA) | capa); | |
617 | ||
618 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
619 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
620 | ||
621 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
622 | while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP | |
623 | && time_before(jiffies, timeout)) | |
624 | ; | |
625 | ||
b417577d | 626 | omap_hsmmc_disable_irq(host); |
11dd62a7 DK |
627 | |
628 | /* Do not initialize card-specific things if the power is off */ | |
629 | if (host->power_mode == MMC_POWER_OFF) | |
630 | goto out; | |
631 | ||
3796fb8a | 632 | omap_hsmmc_set_bus_width(host); |
11dd62a7 | 633 | |
5934df2f | 634 | omap_hsmmc_set_clock(host); |
11dd62a7 | 635 | |
3796fb8a AS |
636 | omap_hsmmc_set_bus_mode(host); |
637 | ||
11dd62a7 DK |
638 | out: |
639 | host->context_loss = context_loss; | |
640 | ||
641 | dev_dbg(mmc_dev(host->mmc), "context is restored\n"); | |
642 | return 0; | |
643 | } | |
644 | ||
645 | /* | |
646 | * Save the MMC host context (store the number of power state changes so far). | |
647 | */ | |
70a3341a | 648 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
649 | { |
650 | struct omap_mmc_platform_data *pdata = host->pdata; | |
651 | int context_loss; | |
652 | ||
653 | if (pdata->get_context_loss_count) { | |
654 | context_loss = pdata->get_context_loss_count(host->dev); | |
655 | if (context_loss < 0) | |
656 | return; | |
657 | host->context_loss = context_loss; | |
658 | } | |
659 | } | |
660 | ||
661 | #else | |
662 | ||
70a3341a | 663 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
664 | { |
665 | return 0; | |
666 | } | |
667 | ||
70a3341a | 668 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
669 | { |
670 | } | |
671 | ||
672 | #endif | |
673 | ||
a45c6cb8 MC |
674 | /* |
675 | * Send init stream sequence to card | |
676 | * before sending IDLE command | |
677 | */ | |
70a3341a | 678 | static void send_init_stream(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
679 | { |
680 | int reg = 0; | |
681 | unsigned long timeout; | |
682 | ||
b62f6228 AH |
683 | if (host->protect_card) |
684 | return; | |
685 | ||
a45c6cb8 | 686 | disable_irq(host->irq); |
b417577d AH |
687 | |
688 | OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); | |
a45c6cb8 MC |
689 | OMAP_HSMMC_WRITE(host->base, CON, |
690 | OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM); | |
691 | OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD); | |
692 | ||
693 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
694 | while ((reg != CC) && time_before(jiffies, timeout)) | |
695 | reg = OMAP_HSMMC_READ(host->base, STAT) & CC; | |
696 | ||
697 | OMAP_HSMMC_WRITE(host->base, CON, | |
698 | OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM); | |
c653a6d4 AH |
699 | |
700 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
701 | OMAP_HSMMC_READ(host->base, STAT); | |
702 | ||
a45c6cb8 MC |
703 | enable_irq(host->irq); |
704 | } | |
705 | ||
706 | static inline | |
70a3341a | 707 | int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
708 | { |
709 | int r = 1; | |
710 | ||
191d1f1d DK |
711 | if (mmc_slot(host).get_cover_state) |
712 | r = mmc_slot(host).get_cover_state(host->dev, host->slot_id); | |
a45c6cb8 MC |
713 | return r; |
714 | } | |
715 | ||
716 | static ssize_t | |
70a3341a | 717 | omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
718 | char *buf) |
719 | { | |
720 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 721 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 722 | |
70a3341a DK |
723 | return sprintf(buf, "%s\n", |
724 | omap_hsmmc_cover_is_closed(host) ? "closed" : "open"); | |
a45c6cb8 MC |
725 | } |
726 | ||
70a3341a | 727 | static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL); |
a45c6cb8 MC |
728 | |
729 | static ssize_t | |
70a3341a | 730 | omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
731 | char *buf) |
732 | { | |
733 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 734 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 735 | |
191d1f1d | 736 | return sprintf(buf, "%s\n", mmc_slot(host).name); |
a45c6cb8 MC |
737 | } |
738 | ||
70a3341a | 739 | static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); |
a45c6cb8 MC |
740 | |
741 | /* | |
742 | * Configure the response type and send the cmd. | |
743 | */ | |
744 | static void | |
70a3341a | 745 | omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, |
a45c6cb8 MC |
746 | struct mmc_data *data) |
747 | { | |
748 | int cmdreg = 0, resptype = 0, cmdtype = 0; | |
749 | ||
750 | dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n", | |
751 | mmc_hostname(host->mmc), cmd->opcode, cmd->arg); | |
752 | host->cmd = cmd; | |
753 | ||
93caf8e6 | 754 | omap_hsmmc_enable_irq(host, cmd); |
a45c6cb8 | 755 | |
4a694dc9 | 756 | host->response_busy = 0; |
a45c6cb8 MC |
757 | if (cmd->flags & MMC_RSP_PRESENT) { |
758 | if (cmd->flags & MMC_RSP_136) | |
759 | resptype = 1; | |
4a694dc9 AH |
760 | else if (cmd->flags & MMC_RSP_BUSY) { |
761 | resptype = 3; | |
762 | host->response_busy = 1; | |
763 | } else | |
a45c6cb8 MC |
764 | resptype = 2; |
765 | } | |
766 | ||
767 | /* | |
768 | * Unlike OMAP1 controller, the cmdtype does not seem to be based on | |
769 | * ac, bc, adtc, bcr. Only commands ending an open ended transfer need | |
770 | * a val of 0x3, rest 0x0. | |
771 | */ | |
772 | if (cmd == host->mrq->stop) | |
773 | cmdtype = 0x3; | |
774 | ||
775 | cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22); | |
dba3c29e B |
776 | if ((host->flags & AUTO_CMD12) && mmc_op_multi(cmd->opcode)) |
777 | cmdreg |= ACEN_ACMD12; | |
a45c6cb8 MC |
778 | |
779 | if (data) { | |
780 | cmdreg |= DP_SELECT | MSBS | BCE; | |
781 | if (data->flags & MMC_DATA_READ) | |
782 | cmdreg |= DDIR; | |
783 | else | |
784 | cmdreg &= ~(DDIR); | |
785 | } | |
786 | ||
787 | if (host->use_dma) | |
788 | cmdreg |= DMA_EN; | |
789 | ||
b417577d | 790 | host->req_in_progress = 1; |
4dffd7a2 | 791 | |
a45c6cb8 MC |
792 | OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg); |
793 | OMAP_HSMMC_WRITE(host->base, CMD, cmdreg); | |
794 | } | |
795 | ||
0ccd76d4 | 796 | static int |
70a3341a | 797 | omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data) |
0ccd76d4 JY |
798 | { |
799 | if (data->flags & MMC_DATA_WRITE) | |
800 | return DMA_TO_DEVICE; | |
801 | else | |
802 | return DMA_FROM_DEVICE; | |
803 | } | |
804 | ||
b417577d AH |
805 | static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) |
806 | { | |
807 | int dma_ch; | |
31463b14 | 808 | unsigned long flags; |
b417577d | 809 | |
31463b14 | 810 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
811 | host->req_in_progress = 0; |
812 | dma_ch = host->dma_ch; | |
31463b14 | 813 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
814 | |
815 | omap_hsmmc_disable_irq(host); | |
816 | /* Do not complete the request if DMA is still in progress */ | |
817 | if (mrq->data && host->use_dma && dma_ch != -1) | |
818 | return; | |
819 | host->mrq = NULL; | |
820 | mmc_request_done(host->mmc, mrq); | |
821 | } | |
822 | ||
a45c6cb8 MC |
823 | /* |
824 | * Notify the transfer complete to MMC core | |
825 | */ | |
826 | static void | |
70a3341a | 827 | omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) |
a45c6cb8 | 828 | { |
4a694dc9 AH |
829 | if (!data) { |
830 | struct mmc_request *mrq = host->mrq; | |
831 | ||
23050103 AH |
832 | /* TC before CC from CMD6 - don't know why, but it happens */ |
833 | if (host->cmd && host->cmd->opcode == 6 && | |
834 | host->response_busy) { | |
835 | host->response_busy = 0; | |
836 | return; | |
837 | } | |
838 | ||
b417577d | 839 | omap_hsmmc_request_done(host, mrq); |
4a694dc9 AH |
840 | return; |
841 | } | |
842 | ||
a45c6cb8 MC |
843 | host->data = NULL; |
844 | ||
a45c6cb8 MC |
845 | if (!data->error) |
846 | data->bytes_xfered += data->blocks * (data->blksz); | |
847 | else | |
848 | data->bytes_xfered = 0; | |
849 | ||
dba3c29e B |
850 | if (data->stop && ((!(host->flags & AUTO_CMD12)) || data->error)) { |
851 | omap_hsmmc_start_command(host, data->stop, NULL); | |
852 | } else { | |
853 | if (data->stop) | |
854 | data->stop->resp[0] = OMAP_HSMMC_READ(host->base, | |
855 | RSP76); | |
b417577d | 856 | omap_hsmmc_request_done(host, data->mrq); |
a45c6cb8 | 857 | } |
a45c6cb8 MC |
858 | } |
859 | ||
860 | /* | |
861 | * Notify the core about command completion | |
862 | */ | |
863 | static void | |
70a3341a | 864 | omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) |
a45c6cb8 MC |
865 | { |
866 | host->cmd = NULL; | |
867 | ||
868 | if (cmd->flags & MMC_RSP_PRESENT) { | |
869 | if (cmd->flags & MMC_RSP_136) { | |
870 | /* response type 2 */ | |
871 | cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10); | |
872 | cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32); | |
873 | cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54); | |
874 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76); | |
875 | } else { | |
876 | /* response types 1, 1b, 3, 4, 5, 6 */ | |
877 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10); | |
878 | } | |
879 | } | |
b417577d AH |
880 | if ((host->data == NULL && !host->response_busy) || cmd->error) |
881 | omap_hsmmc_request_done(host, cmd->mrq); | |
a45c6cb8 MC |
882 | } |
883 | ||
884 | /* | |
885 | * DMA clean up for command errors | |
886 | */ | |
70a3341a | 887 | static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) |
a45c6cb8 | 888 | { |
b417577d | 889 | int dma_ch; |
31463b14 | 890 | unsigned long flags; |
b417577d | 891 | |
82788ff5 | 892 | host->data->error = errno; |
a45c6cb8 | 893 | |
31463b14 | 894 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
895 | dma_ch = host->dma_ch; |
896 | host->dma_ch = -1; | |
31463b14 | 897 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
898 | |
899 | if (host->use_dma && dma_ch != -1) { | |
a9120c33 PF |
900 | dma_unmap_sg(mmc_dev(host->mmc), host->data->sg, |
901 | host->data->sg_len, | |
70a3341a | 902 | omap_hsmmc_get_dma_dir(host, host->data)); |
b417577d | 903 | omap_free_dma(dma_ch); |
053bf34f | 904 | host->data->host_cookie = 0; |
a45c6cb8 MC |
905 | } |
906 | host->data = NULL; | |
a45c6cb8 MC |
907 | } |
908 | ||
909 | /* | |
910 | * Readable error output | |
911 | */ | |
912 | #ifdef CONFIG_MMC_DEBUG | |
699b958b | 913 | static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status) |
a45c6cb8 MC |
914 | { |
915 | /* --- means reserved bit without definition at documentation */ | |
70a3341a | 916 | static const char *omap_hsmmc_status_bits[] = { |
699b958b AH |
917 | "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" , |
918 | "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI", | |
919 | "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" , | |
920 | "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---" | |
a45c6cb8 MC |
921 | }; |
922 | char res[256]; | |
923 | char *buf = res; | |
924 | int len, i; | |
925 | ||
926 | len = sprintf(buf, "MMC IRQ 0x%x :", status); | |
927 | buf += len; | |
928 | ||
70a3341a | 929 | for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++) |
a45c6cb8 | 930 | if (status & (1 << i)) { |
70a3341a | 931 | len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]); |
a45c6cb8 MC |
932 | buf += len; |
933 | } | |
934 | ||
935 | dev_dbg(mmc_dev(host->mmc), "%s\n", res); | |
936 | } | |
699b958b AH |
937 | #else |
938 | static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, | |
939 | u32 status) | |
940 | { | |
941 | } | |
a45c6cb8 MC |
942 | #endif /* CONFIG_MMC_DEBUG */ |
943 | ||
3ebf74b1 JP |
944 | /* |
945 | * MMC controller internal state machines reset | |
946 | * | |
947 | * Used to reset command or data internal state machines, using respectively | |
948 | * SRC or SRD bit of SYSCTL register | |
949 | * Can be called from interrupt context | |
950 | */ | |
70a3341a DK |
951 | static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, |
952 | unsigned long bit) | |
3ebf74b1 JP |
953 | { |
954 | unsigned long i = 0; | |
955 | unsigned long limit = (loops_per_jiffy * | |
956 | msecs_to_jiffies(MMC_TIMEOUT_MS)); | |
957 | ||
958 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
959 | OMAP_HSMMC_READ(host->base, SYSCTL) | bit); | |
960 | ||
07ad64b6 MC |
961 | /* |
962 | * OMAP4 ES2 and greater has an updated reset logic. | |
963 | * Monitor a 0->1 transition first | |
964 | */ | |
965 | if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) { | |
b432b4b3 | 966 | while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit)) |
07ad64b6 MC |
967 | && (i++ < limit)) |
968 | cpu_relax(); | |
969 | } | |
970 | i = 0; | |
971 | ||
3ebf74b1 JP |
972 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) && |
973 | (i++ < limit)) | |
974 | cpu_relax(); | |
975 | ||
976 | if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit) | |
977 | dev_err(mmc_dev(host->mmc), | |
978 | "Timeout waiting on controller reset in %s\n", | |
979 | __func__); | |
980 | } | |
a45c6cb8 | 981 | |
b417577d | 982 | static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) |
a45c6cb8 | 983 | { |
a45c6cb8 | 984 | struct mmc_data *data; |
b417577d AH |
985 | int end_cmd = 0, end_trans = 0; |
986 | ||
987 | if (!host->req_in_progress) { | |
988 | do { | |
989 | OMAP_HSMMC_WRITE(host->base, STAT, status); | |
990 | /* Flush posted write */ | |
991 | status = OMAP_HSMMC_READ(host->base, STAT); | |
992 | } while (status & INT_EN_MASK); | |
993 | return; | |
a45c6cb8 MC |
994 | } |
995 | ||
996 | data = host->data; | |
a45c6cb8 MC |
997 | dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status); |
998 | ||
999 | if (status & ERR) { | |
699b958b | 1000 | omap_hsmmc_dbg_report_irq(host, status); |
a45c6cb8 MC |
1001 | if ((status & CMD_TIMEOUT) || |
1002 | (status & CMD_CRC)) { | |
1003 | if (host->cmd) { | |
1004 | if (status & CMD_TIMEOUT) { | |
70a3341a DK |
1005 | omap_hsmmc_reset_controller_fsm(host, |
1006 | SRC); | |
a45c6cb8 MC |
1007 | host->cmd->error = -ETIMEDOUT; |
1008 | } else { | |
1009 | host->cmd->error = -EILSEQ; | |
1010 | } | |
1011 | end_cmd = 1; | |
1012 | } | |
4a694dc9 AH |
1013 | if (host->data || host->response_busy) { |
1014 | if (host->data) | |
70a3341a DK |
1015 | omap_hsmmc_dma_cleanup(host, |
1016 | -ETIMEDOUT); | |
4a694dc9 | 1017 | host->response_busy = 0; |
70a3341a | 1018 | omap_hsmmc_reset_controller_fsm(host, SRD); |
c232f457 | 1019 | } |
a45c6cb8 MC |
1020 | } |
1021 | if ((status & DATA_TIMEOUT) || | |
1022 | (status & DATA_CRC)) { | |
4a694dc9 AH |
1023 | if (host->data || host->response_busy) { |
1024 | int err = (status & DATA_TIMEOUT) ? | |
1025 | -ETIMEDOUT : -EILSEQ; | |
1026 | ||
1027 | if (host->data) | |
70a3341a | 1028 | omap_hsmmc_dma_cleanup(host, err); |
a45c6cb8 | 1029 | else |
4a694dc9 AH |
1030 | host->mrq->cmd->error = err; |
1031 | host->response_busy = 0; | |
70a3341a | 1032 | omap_hsmmc_reset_controller_fsm(host, SRD); |
a45c6cb8 MC |
1033 | end_trans = 1; |
1034 | } | |
1035 | } | |
1036 | if (status & CARD_ERR) { | |
1037 | dev_dbg(mmc_dev(host->mmc), | |
1038 | "Ignoring card err CMD%d\n", host->cmd->opcode); | |
1039 | if (host->cmd) | |
1040 | end_cmd = 1; | |
1041 | if (host->data) | |
1042 | end_trans = 1; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | OMAP_HSMMC_WRITE(host->base, STAT, status); | |
1047 | ||
a8fe29d8 | 1048 | if (end_cmd || ((status & CC) && host->cmd)) |
70a3341a | 1049 | omap_hsmmc_cmd_done(host, host->cmd); |
0a40e647 | 1050 | if ((end_trans || (status & TC)) && host->mrq) |
70a3341a | 1051 | omap_hsmmc_xfer_done(host, data); |
b417577d | 1052 | } |
a45c6cb8 | 1053 | |
b417577d AH |
1054 | /* |
1055 | * MMC controller IRQ handler | |
1056 | */ | |
1057 | static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) | |
1058 | { | |
1059 | struct omap_hsmmc_host *host = dev_id; | |
1060 | int status; | |
1061 | ||
1062 | status = OMAP_HSMMC_READ(host->base, STAT); | |
1063 | do { | |
1064 | omap_hsmmc_do_irq(host, status); | |
1065 | /* Flush posted write */ | |
1066 | status = OMAP_HSMMC_READ(host->base, STAT); | |
1067 | } while (status & INT_EN_MASK); | |
4dffd7a2 | 1068 | |
a45c6cb8 MC |
1069 | return IRQ_HANDLED; |
1070 | } | |
1071 | ||
70a3341a | 1072 | static void set_sd_bus_power(struct omap_hsmmc_host *host) |
e13bb300 AH |
1073 | { |
1074 | unsigned long i; | |
1075 | ||
1076 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
1077 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
1078 | for (i = 0; i < loops_per_jiffy; i++) { | |
1079 | if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP) | |
1080 | break; | |
1081 | cpu_relax(); | |
1082 | } | |
1083 | } | |
1084 | ||
a45c6cb8 | 1085 | /* |
eb250826 DB |
1086 | * Switch MMC interface voltage ... only relevant for MMC1. |
1087 | * | |
1088 | * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver. | |
1089 | * The MMC2 transceiver controls are used instead of DAT4..DAT7. | |
1090 | * Some chips, like eMMC ones, use internal transceivers. | |
a45c6cb8 | 1091 | */ |
70a3341a | 1092 | static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) |
a45c6cb8 MC |
1093 | { |
1094 | u32 reg_val = 0; | |
1095 | int ret; | |
1096 | ||
1097 | /* Disable the clocks */ | |
fa4aa2d4 | 1098 | pm_runtime_put_sync(host->dev); |
cd03d9a8 | 1099 | if (host->dbclk) |
2bec0893 | 1100 | clk_disable(host->dbclk); |
a45c6cb8 MC |
1101 | |
1102 | /* Turn the power off */ | |
1103 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); | |
a45c6cb8 MC |
1104 | |
1105 | /* Turn the power ON with given VDD 1.8 or 3.0v */ | |
2bec0893 AH |
1106 | if (!ret) |
1107 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, | |
1108 | vdd); | |
fa4aa2d4 | 1109 | pm_runtime_get_sync(host->dev); |
cd03d9a8 | 1110 | if (host->dbclk) |
2bec0893 AH |
1111 | clk_enable(host->dbclk); |
1112 | ||
a45c6cb8 MC |
1113 | if (ret != 0) |
1114 | goto err; | |
1115 | ||
a45c6cb8 MC |
1116 | OMAP_HSMMC_WRITE(host->base, HCTL, |
1117 | OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR); | |
1118 | reg_val = OMAP_HSMMC_READ(host->base, HCTL); | |
eb250826 | 1119 | |
a45c6cb8 MC |
1120 | /* |
1121 | * If a MMC dual voltage card is detected, the set_ios fn calls | |
1122 | * this fn with VDD bit set for 1.8V. Upon card removal from the | |
70a3341a | 1123 | * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF. |
a45c6cb8 | 1124 | * |
eb250826 DB |
1125 | * Cope with a bit of slop in the range ... per data sheets: |
1126 | * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max, | |
1127 | * but recommended values are 1.71V to 1.89V | |
1128 | * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max, | |
1129 | * but recommended values are 2.7V to 3.3V | |
1130 | * | |
1131 | * Board setup code shouldn't permit anything very out-of-range. | |
1132 | * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the | |
1133 | * middle range) but VSIM can't power DAT4..DAT7 at more than 3V. | |
a45c6cb8 | 1134 | */ |
eb250826 | 1135 | if ((1 << vdd) <= MMC_VDD_23_24) |
a45c6cb8 | 1136 | reg_val |= SDVS18; |
eb250826 DB |
1137 | else |
1138 | reg_val |= SDVS30; | |
a45c6cb8 MC |
1139 | |
1140 | OMAP_HSMMC_WRITE(host->base, HCTL, reg_val); | |
e13bb300 | 1141 | set_sd_bus_power(host); |
a45c6cb8 MC |
1142 | |
1143 | return 0; | |
1144 | err: | |
1145 | dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n"); | |
1146 | return ret; | |
1147 | } | |
1148 | ||
b62f6228 AH |
1149 | /* Protect the card while the cover is open */ |
1150 | static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host) | |
1151 | { | |
1152 | if (!mmc_slot(host).get_cover_state) | |
1153 | return; | |
1154 | ||
1155 | host->reqs_blocked = 0; | |
1156 | if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) { | |
1157 | if (host->protect_card) { | |
2cecdf00 | 1158 | dev_info(host->dev, "%s: cover is closed, " |
b62f6228 AH |
1159 | "card is now accessible\n", |
1160 | mmc_hostname(host->mmc)); | |
1161 | host->protect_card = 0; | |
1162 | } | |
1163 | } else { | |
1164 | if (!host->protect_card) { | |
2cecdf00 | 1165 | dev_info(host->dev, "%s: cover is open, " |
b62f6228 AH |
1166 | "card is now inaccessible\n", |
1167 | mmc_hostname(host->mmc)); | |
1168 | host->protect_card = 1; | |
1169 | } | |
1170 | } | |
1171 | } | |
1172 | ||
a45c6cb8 | 1173 | /* |
7efab4f3 | 1174 | * irq handler to notify the core about card insertion/removal |
a45c6cb8 | 1175 | */ |
7efab4f3 | 1176 | static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id) |
a45c6cb8 | 1177 | { |
7efab4f3 | 1178 | struct omap_hsmmc_host *host = dev_id; |
249d0fa9 | 1179 | struct omap_mmc_slot_data *slot = &mmc_slot(host); |
a6b2240d AH |
1180 | int carddetect; |
1181 | ||
1182 | if (host->suspended) | |
7efab4f3 | 1183 | return IRQ_HANDLED; |
a6b2240d AH |
1184 | |
1185 | sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch"); | |
249d0fa9 | 1186 | |
191d1f1d | 1187 | if (slot->card_detect) |
db0fefc5 | 1188 | carddetect = slot->card_detect(host->dev, host->slot_id); |
b62f6228 AH |
1189 | else { |
1190 | omap_hsmmc_protect_card(host); | |
a6b2240d | 1191 | carddetect = -ENOSYS; |
b62f6228 | 1192 | } |
a45c6cb8 | 1193 | |
cdeebadd | 1194 | if (carddetect) |
a45c6cb8 | 1195 | mmc_detect_change(host->mmc, (HZ * 200) / 1000); |
cdeebadd | 1196 | else |
a45c6cb8 | 1197 | mmc_detect_change(host->mmc, (HZ * 50) / 1000); |
a45c6cb8 MC |
1198 | return IRQ_HANDLED; |
1199 | } | |
1200 | ||
70a3341a | 1201 | static int omap_hsmmc_get_dma_sync_dev(struct omap_hsmmc_host *host, |
0ccd76d4 JY |
1202 | struct mmc_data *data) |
1203 | { | |
1204 | int sync_dev; | |
1205 | ||
f3e2f1dd GI |
1206 | if (data->flags & MMC_DATA_WRITE) |
1207 | sync_dev = host->dma_line_tx; | |
1208 | else | |
1209 | sync_dev = host->dma_line_rx; | |
0ccd76d4 JY |
1210 | return sync_dev; |
1211 | } | |
1212 | ||
70a3341a | 1213 | static void omap_hsmmc_config_dma_params(struct omap_hsmmc_host *host, |
0ccd76d4 JY |
1214 | struct mmc_data *data, |
1215 | struct scatterlist *sgl) | |
1216 | { | |
1217 | int blksz, nblk, dma_ch; | |
1218 | ||
1219 | dma_ch = host->dma_ch; | |
1220 | if (data->flags & MMC_DATA_WRITE) { | |
1221 | omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT, | |
1222 | (host->mapbase + OMAP_HSMMC_DATA), 0, 0); | |
1223 | omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC, | |
1224 | sg_dma_address(sgl), 0, 0); | |
1225 | } else { | |
1226 | omap_set_dma_src_params(dma_ch, 0, OMAP_DMA_AMODE_CONSTANT, | |
191d1f1d | 1227 | (host->mapbase + OMAP_HSMMC_DATA), 0, 0); |
0ccd76d4 JY |
1228 | omap_set_dma_dest_params(dma_ch, 0, OMAP_DMA_AMODE_POST_INC, |
1229 | sg_dma_address(sgl), 0, 0); | |
1230 | } | |
1231 | ||
1232 | blksz = host->data->blksz; | |
1233 | nblk = sg_dma_len(sgl) / blksz; | |
1234 | ||
1235 | omap_set_dma_transfer_params(dma_ch, OMAP_DMA_DATA_TYPE_S32, | |
1236 | blksz / 4, nblk, OMAP_DMA_SYNC_FRAME, | |
70a3341a | 1237 | omap_hsmmc_get_dma_sync_dev(host, data), |
0ccd76d4 JY |
1238 | !(data->flags & MMC_DATA_WRITE)); |
1239 | ||
1240 | omap_start_dma(dma_ch); | |
1241 | } | |
1242 | ||
a45c6cb8 MC |
1243 | /* |
1244 | * DMA call back function | |
1245 | */ | |
b417577d | 1246 | static void omap_hsmmc_dma_cb(int lch, u16 ch_status, void *cb_data) |
a45c6cb8 | 1247 | { |
b417577d | 1248 | struct omap_hsmmc_host *host = cb_data; |
770d7432 | 1249 | struct mmc_data *data; |
b417577d | 1250 | int dma_ch, req_in_progress; |
31463b14 | 1251 | unsigned long flags; |
a45c6cb8 | 1252 | |
f3584e5e V |
1253 | if (!(ch_status & OMAP_DMA_BLOCK_IRQ)) { |
1254 | dev_warn(mmc_dev(host->mmc), "unexpected dma status %x\n", | |
1255 | ch_status); | |
1256 | return; | |
1257 | } | |
a45c6cb8 | 1258 | |
31463b14 | 1259 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d | 1260 | if (host->dma_ch < 0) { |
31463b14 | 1261 | spin_unlock_irqrestore(&host->irq_lock, flags); |
a45c6cb8 | 1262 | return; |
b417577d | 1263 | } |
a45c6cb8 | 1264 | |
770d7432 | 1265 | data = host->mrq->data; |
0ccd76d4 JY |
1266 | host->dma_sg_idx++; |
1267 | if (host->dma_sg_idx < host->dma_len) { | |
1268 | /* Fire up the next transfer. */ | |
b417577d AH |
1269 | omap_hsmmc_config_dma_params(host, data, |
1270 | data->sg + host->dma_sg_idx); | |
31463b14 | 1271 | spin_unlock_irqrestore(&host->irq_lock, flags); |
0ccd76d4 JY |
1272 | return; |
1273 | } | |
1274 | ||
9782aff8 PF |
1275 | if (!data->host_cookie) |
1276 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
1277 | omap_hsmmc_get_dma_dir(host, data)); | |
b417577d AH |
1278 | |
1279 | req_in_progress = host->req_in_progress; | |
1280 | dma_ch = host->dma_ch; | |
a45c6cb8 | 1281 | host->dma_ch = -1; |
31463b14 | 1282 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
1283 | |
1284 | omap_free_dma(dma_ch); | |
1285 | ||
1286 | /* If DMA has finished after TC, complete the request */ | |
1287 | if (!req_in_progress) { | |
1288 | struct mmc_request *mrq = host->mrq; | |
1289 | ||
1290 | host->mrq = NULL; | |
1291 | mmc_request_done(host->mmc, mrq); | |
1292 | } | |
a45c6cb8 MC |
1293 | } |
1294 | ||
9782aff8 PF |
1295 | static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host, |
1296 | struct mmc_data *data, | |
1297 | struct omap_hsmmc_next *next) | |
1298 | { | |
1299 | int dma_len; | |
1300 | ||
1301 | if (!next && data->host_cookie && | |
1302 | data->host_cookie != host->next_data.cookie) { | |
2cecdf00 | 1303 | dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d" |
9782aff8 PF |
1304 | " host->next_data.cookie %d\n", |
1305 | __func__, data->host_cookie, host->next_data.cookie); | |
1306 | data->host_cookie = 0; | |
1307 | } | |
1308 | ||
1309 | /* Check if next job is already prepared */ | |
1310 | if (next || | |
1311 | (!next && data->host_cookie != host->next_data.cookie)) { | |
1312 | dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, | |
1313 | data->sg_len, | |
1314 | omap_hsmmc_get_dma_dir(host, data)); | |
1315 | ||
1316 | } else { | |
1317 | dma_len = host->next_data.dma_len; | |
1318 | host->next_data.dma_len = 0; | |
1319 | } | |
1320 | ||
1321 | ||
1322 | if (dma_len == 0) | |
1323 | return -EINVAL; | |
1324 | ||
1325 | if (next) { | |
1326 | next->dma_len = dma_len; | |
1327 | data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie; | |
1328 | } else | |
1329 | host->dma_len = dma_len; | |
1330 | ||
1331 | return 0; | |
1332 | } | |
1333 | ||
a45c6cb8 MC |
1334 | /* |
1335 | * Routine to configure and start DMA for the MMC card | |
1336 | */ | |
70a3341a DK |
1337 | static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host, |
1338 | struct mmc_request *req) | |
a45c6cb8 | 1339 | { |
b417577d | 1340 | int dma_ch = 0, ret = 0, i; |
a45c6cb8 MC |
1341 | struct mmc_data *data = req->data; |
1342 | ||
0ccd76d4 | 1343 | /* Sanity check: all the SG entries must be aligned by block size. */ |
a3f406f8 | 1344 | for (i = 0; i < data->sg_len; i++) { |
0ccd76d4 JY |
1345 | struct scatterlist *sgl; |
1346 | ||
1347 | sgl = data->sg + i; | |
1348 | if (sgl->length % data->blksz) | |
1349 | return -EINVAL; | |
1350 | } | |
1351 | if ((data->blksz % 4) != 0) | |
1352 | /* REVISIT: The MMC buffer increments only when MSB is written. | |
1353 | * Return error for blksz which is non multiple of four. | |
1354 | */ | |
1355 | return -EINVAL; | |
1356 | ||
b417577d | 1357 | BUG_ON(host->dma_ch != -1); |
a45c6cb8 | 1358 | |
70a3341a DK |
1359 | ret = omap_request_dma(omap_hsmmc_get_dma_sync_dev(host, data), |
1360 | "MMC/SD", omap_hsmmc_dma_cb, host, &dma_ch); | |
a45c6cb8 | 1361 | if (ret != 0) { |
0ccd76d4 | 1362 | dev_err(mmc_dev(host->mmc), |
a45c6cb8 MC |
1363 | "%s: omap_request_dma() failed with %d\n", |
1364 | mmc_hostname(host->mmc), ret); | |
1365 | return ret; | |
1366 | } | |
9782aff8 PF |
1367 | ret = omap_hsmmc_pre_dma_transfer(host, data, NULL); |
1368 | if (ret) | |
1369 | return ret; | |
a45c6cb8 | 1370 | |
a45c6cb8 | 1371 | host->dma_ch = dma_ch; |
0ccd76d4 | 1372 | host->dma_sg_idx = 0; |
a45c6cb8 | 1373 | |
70a3341a | 1374 | omap_hsmmc_config_dma_params(host, data, data->sg); |
a45c6cb8 | 1375 | |
a45c6cb8 MC |
1376 | return 0; |
1377 | } | |
1378 | ||
70a3341a | 1379 | static void set_data_timeout(struct omap_hsmmc_host *host, |
e2bf08d6 AH |
1380 | unsigned int timeout_ns, |
1381 | unsigned int timeout_clks) | |
a45c6cb8 MC |
1382 | { |
1383 | unsigned int timeout, cycle_ns; | |
1384 | uint32_t reg, clkd, dto = 0; | |
1385 | ||
1386 | reg = OMAP_HSMMC_READ(host->base, SYSCTL); | |
1387 | clkd = (reg & CLKD_MASK) >> CLKD_SHIFT; | |
1388 | if (clkd == 0) | |
1389 | clkd = 1; | |
1390 | ||
1391 | cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd); | |
e2bf08d6 AH |
1392 | timeout = timeout_ns / cycle_ns; |
1393 | timeout += timeout_clks; | |
a45c6cb8 MC |
1394 | if (timeout) { |
1395 | while ((timeout & 0x80000000) == 0) { | |
1396 | dto += 1; | |
1397 | timeout <<= 1; | |
1398 | } | |
1399 | dto = 31 - dto; | |
1400 | timeout <<= 1; | |
1401 | if (timeout && dto) | |
1402 | dto += 1; | |
1403 | if (dto >= 13) | |
1404 | dto -= 13; | |
1405 | else | |
1406 | dto = 0; | |
1407 | if (dto > 14) | |
1408 | dto = 14; | |
1409 | } | |
1410 | ||
1411 | reg &= ~DTO_MASK; | |
1412 | reg |= dto << DTO_SHIFT; | |
1413 | OMAP_HSMMC_WRITE(host->base, SYSCTL, reg); | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Configure block length for MMC/SD cards and initiate the transfer. | |
1418 | */ | |
1419 | static int | |
70a3341a | 1420 | omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) |
a45c6cb8 MC |
1421 | { |
1422 | int ret; | |
1423 | host->data = req->data; | |
1424 | ||
1425 | if (req->data == NULL) { | |
a45c6cb8 | 1426 | OMAP_HSMMC_WRITE(host->base, BLK, 0); |
e2bf08d6 AH |
1427 | /* |
1428 | * Set an arbitrary 100ms data timeout for commands with | |
1429 | * busy signal. | |
1430 | */ | |
1431 | if (req->cmd->flags & MMC_RSP_BUSY) | |
1432 | set_data_timeout(host, 100000000U, 0); | |
a45c6cb8 MC |
1433 | return 0; |
1434 | } | |
1435 | ||
1436 | OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz) | |
1437 | | (req->data->blocks << 16)); | |
e2bf08d6 | 1438 | set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks); |
a45c6cb8 | 1439 | |
a45c6cb8 | 1440 | if (host->use_dma) { |
70a3341a | 1441 | ret = omap_hsmmc_start_dma_transfer(host, req); |
a45c6cb8 MC |
1442 | if (ret != 0) { |
1443 | dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n"); | |
1444 | return ret; | |
1445 | } | |
1446 | } | |
1447 | return 0; | |
1448 | } | |
1449 | ||
9782aff8 PF |
1450 | static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, |
1451 | int err) | |
1452 | { | |
1453 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1454 | struct mmc_data *data = mrq->data; | |
1455 | ||
1456 | if (host->use_dma) { | |
053bf34f PF |
1457 | if (data->host_cookie) |
1458 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, | |
1459 | data->sg_len, | |
1460 | omap_hsmmc_get_dma_dir(host, data)); | |
9782aff8 PF |
1461 | data->host_cookie = 0; |
1462 | } | |
1463 | } | |
1464 | ||
1465 | static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
1466 | bool is_first_req) | |
1467 | { | |
1468 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1469 | ||
1470 | if (mrq->data->host_cookie) { | |
1471 | mrq->data->host_cookie = 0; | |
1472 | return ; | |
1473 | } | |
1474 | ||
1475 | if (host->use_dma) | |
1476 | if (omap_hsmmc_pre_dma_transfer(host, mrq->data, | |
1477 | &host->next_data)) | |
1478 | mrq->data->host_cookie = 0; | |
1479 | } | |
1480 | ||
a45c6cb8 MC |
1481 | /* |
1482 | * Request function. for read/write operation | |
1483 | */ | |
70a3341a | 1484 | static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) |
a45c6cb8 | 1485 | { |
70a3341a | 1486 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3f406f8 | 1487 | int err; |
a45c6cb8 | 1488 | |
b417577d AH |
1489 | BUG_ON(host->req_in_progress); |
1490 | BUG_ON(host->dma_ch != -1); | |
1491 | if (host->protect_card) { | |
1492 | if (host->reqs_blocked < 3) { | |
1493 | /* | |
1494 | * Ensure the controller is left in a consistent | |
1495 | * state by resetting the command and data state | |
1496 | * machines. | |
1497 | */ | |
1498 | omap_hsmmc_reset_controller_fsm(host, SRD); | |
1499 | omap_hsmmc_reset_controller_fsm(host, SRC); | |
1500 | host->reqs_blocked += 1; | |
1501 | } | |
1502 | req->cmd->error = -EBADF; | |
1503 | if (req->data) | |
1504 | req->data->error = -EBADF; | |
1505 | req->cmd->retries = 0; | |
1506 | mmc_request_done(mmc, req); | |
1507 | return; | |
1508 | } else if (host->reqs_blocked) | |
1509 | host->reqs_blocked = 0; | |
a45c6cb8 MC |
1510 | WARN_ON(host->mrq != NULL); |
1511 | host->mrq = req; | |
70a3341a | 1512 | err = omap_hsmmc_prepare_data(host, req); |
a3f406f8 JL |
1513 | if (err) { |
1514 | req->cmd->error = err; | |
1515 | if (req->data) | |
1516 | req->data->error = err; | |
1517 | host->mrq = NULL; | |
1518 | mmc_request_done(mmc, req); | |
1519 | return; | |
1520 | } | |
1521 | ||
70a3341a | 1522 | omap_hsmmc_start_command(host, req->cmd, req->data); |
a45c6cb8 MC |
1523 | } |
1524 | ||
a45c6cb8 | 1525 | /* Routine to configure clock values. Exposed API to core */ |
70a3341a | 1526 | static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
a45c6cb8 | 1527 | { |
70a3341a | 1528 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3621465 | 1529 | int do_send_init_stream = 0; |
a45c6cb8 | 1530 | |
fa4aa2d4 | 1531 | pm_runtime_get_sync(host->dev); |
5e2ea617 | 1532 | |
a3621465 AH |
1533 | if (ios->power_mode != host->power_mode) { |
1534 | switch (ios->power_mode) { | |
1535 | case MMC_POWER_OFF: | |
1536 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1537 | 0, 0); | |
623821f7 | 1538 | host->vdd = 0; |
a3621465 AH |
1539 | break; |
1540 | case MMC_POWER_UP: | |
1541 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1542 | 1, ios->vdd); | |
623821f7 | 1543 | host->vdd = ios->vdd; |
a3621465 AH |
1544 | break; |
1545 | case MMC_POWER_ON: | |
1546 | do_send_init_stream = 1; | |
1547 | break; | |
1548 | } | |
1549 | host->power_mode = ios->power_mode; | |
a45c6cb8 MC |
1550 | } |
1551 | ||
dd498eff DK |
1552 | /* FIXME: set registers based only on changes to ios */ |
1553 | ||
3796fb8a | 1554 | omap_hsmmc_set_bus_width(host); |
a45c6cb8 | 1555 | |
4621d5f8 | 1556 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
eb250826 DB |
1557 | /* Only MMC1 can interface at 3V without some flavor |
1558 | * of external transceiver; but they all handle 1.8V. | |
1559 | */ | |
a45c6cb8 | 1560 | if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) && |
1f84b71b RN |
1561 | (ios->vdd == DUAL_VOLT_OCR_BIT) && |
1562 | /* | |
1563 | * With pbias cell programming missing, this | |
1564 | * can't be allowed when booting with device | |
1565 | * tree. | |
1566 | */ | |
4d048f91 | 1567 | !host->dev->of_node) { |
a45c6cb8 MC |
1568 | /* |
1569 | * The mmc_select_voltage fn of the core does | |
1570 | * not seem to set the power_mode to | |
1571 | * MMC_POWER_UP upon recalculating the voltage. | |
1572 | * vdd 1.8v. | |
1573 | */ | |
70a3341a DK |
1574 | if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0) |
1575 | dev_dbg(mmc_dev(host->mmc), | |
a45c6cb8 MC |
1576 | "Switch operation failed\n"); |
1577 | } | |
1578 | } | |
1579 | ||
5934df2f | 1580 | omap_hsmmc_set_clock(host); |
a45c6cb8 | 1581 | |
a3621465 | 1582 | if (do_send_init_stream) |
a45c6cb8 MC |
1583 | send_init_stream(host); |
1584 | ||
3796fb8a | 1585 | omap_hsmmc_set_bus_mode(host); |
5e2ea617 | 1586 | |
fa4aa2d4 | 1587 | pm_runtime_put_autosuspend(host->dev); |
a45c6cb8 MC |
1588 | } |
1589 | ||
1590 | static int omap_hsmmc_get_cd(struct mmc_host *mmc) | |
1591 | { | |
70a3341a | 1592 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1593 | |
191d1f1d | 1594 | if (!mmc_slot(host).card_detect) |
a45c6cb8 | 1595 | return -ENOSYS; |
db0fefc5 | 1596 | return mmc_slot(host).card_detect(host->dev, host->slot_id); |
a45c6cb8 MC |
1597 | } |
1598 | ||
1599 | static int omap_hsmmc_get_ro(struct mmc_host *mmc) | |
1600 | { | |
70a3341a | 1601 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1602 | |
191d1f1d | 1603 | if (!mmc_slot(host).get_ro) |
a45c6cb8 | 1604 | return -ENOSYS; |
191d1f1d | 1605 | return mmc_slot(host).get_ro(host->dev, 0); |
a45c6cb8 MC |
1606 | } |
1607 | ||
4816858c GI |
1608 | static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) |
1609 | { | |
1610 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1611 | ||
1612 | if (mmc_slot(host).init_card) | |
1613 | mmc_slot(host).init_card(card); | |
1614 | } | |
1615 | ||
70a3341a | 1616 | static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) |
1b331e69 KK |
1617 | { |
1618 | u32 hctl, capa, value; | |
1619 | ||
1620 | /* Only MMC1 supports 3.0V */ | |
4621d5f8 | 1621 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
1b331e69 KK |
1622 | hctl = SDVS30; |
1623 | capa = VS30 | VS18; | |
1624 | } else { | |
1625 | hctl = SDVS18; | |
1626 | capa = VS18; | |
1627 | } | |
1628 | ||
1629 | value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK; | |
1630 | OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl); | |
1631 | ||
1632 | value = OMAP_HSMMC_READ(host->base, CAPA); | |
1633 | OMAP_HSMMC_WRITE(host->base, CAPA, value | capa); | |
1634 | ||
1635 | /* Set the controller to AUTO IDLE mode */ | |
1636 | value = OMAP_HSMMC_READ(host->base, SYSCONFIG); | |
1637 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE); | |
1638 | ||
1639 | /* Set SD bus power bit */ | |
e13bb300 | 1640 | set_sd_bus_power(host); |
1b331e69 KK |
1641 | } |
1642 | ||
70a3341a | 1643 | static int omap_hsmmc_enable_fclk(struct mmc_host *mmc) |
dd498eff | 1644 | { |
70a3341a | 1645 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1646 | |
fa4aa2d4 B |
1647 | pm_runtime_get_sync(host->dev); |
1648 | ||
dd498eff DK |
1649 | return 0; |
1650 | } | |
1651 | ||
907d2e7c | 1652 | static int omap_hsmmc_disable_fclk(struct mmc_host *mmc) |
dd498eff | 1653 | { |
70a3341a | 1654 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1655 | |
fa4aa2d4 B |
1656 | pm_runtime_mark_last_busy(host->dev); |
1657 | pm_runtime_put_autosuspend(host->dev); | |
1658 | ||
dd498eff DK |
1659 | return 0; |
1660 | } | |
1661 | ||
70a3341a DK |
1662 | static const struct mmc_host_ops omap_hsmmc_ops = { |
1663 | .enable = omap_hsmmc_enable_fclk, | |
1664 | .disable = omap_hsmmc_disable_fclk, | |
9782aff8 PF |
1665 | .post_req = omap_hsmmc_post_req, |
1666 | .pre_req = omap_hsmmc_pre_req, | |
70a3341a DK |
1667 | .request = omap_hsmmc_request, |
1668 | .set_ios = omap_hsmmc_set_ios, | |
dd498eff DK |
1669 | .get_cd = omap_hsmmc_get_cd, |
1670 | .get_ro = omap_hsmmc_get_ro, | |
4816858c | 1671 | .init_card = omap_hsmmc_init_card, |
dd498eff DK |
1672 | /* NYET -- enable_sdio_irq */ |
1673 | }; | |
1674 | ||
d900f712 DK |
1675 | #ifdef CONFIG_DEBUG_FS |
1676 | ||
70a3341a | 1677 | static int omap_hsmmc_regs_show(struct seq_file *s, void *data) |
d900f712 DK |
1678 | { |
1679 | struct mmc_host *mmc = s->private; | |
70a3341a | 1680 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
11dd62a7 DK |
1681 | int context_loss = 0; |
1682 | ||
70a3341a DK |
1683 | if (host->pdata->get_context_loss_count) |
1684 | context_loss = host->pdata->get_context_loss_count(host->dev); | |
d900f712 | 1685 | |
907d2e7c AH |
1686 | seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n", |
1687 | mmc->index, host->context_loss, context_loss); | |
5e2ea617 | 1688 | |
7a8c2cef | 1689 | if (host->suspended) { |
dd498eff DK |
1690 | seq_printf(s, "host suspended, can't read registers\n"); |
1691 | return 0; | |
1692 | } | |
1693 | ||
fa4aa2d4 | 1694 | pm_runtime_get_sync(host->dev); |
d900f712 DK |
1695 | |
1696 | seq_printf(s, "SYSCONFIG:\t0x%08x\n", | |
1697 | OMAP_HSMMC_READ(host->base, SYSCONFIG)); | |
1698 | seq_printf(s, "CON:\t\t0x%08x\n", | |
1699 | OMAP_HSMMC_READ(host->base, CON)); | |
1700 | seq_printf(s, "HCTL:\t\t0x%08x\n", | |
1701 | OMAP_HSMMC_READ(host->base, HCTL)); | |
1702 | seq_printf(s, "SYSCTL:\t\t0x%08x\n", | |
1703 | OMAP_HSMMC_READ(host->base, SYSCTL)); | |
1704 | seq_printf(s, "IE:\t\t0x%08x\n", | |
1705 | OMAP_HSMMC_READ(host->base, IE)); | |
1706 | seq_printf(s, "ISE:\t\t0x%08x\n", | |
1707 | OMAP_HSMMC_READ(host->base, ISE)); | |
1708 | seq_printf(s, "CAPA:\t\t0x%08x\n", | |
1709 | OMAP_HSMMC_READ(host->base, CAPA)); | |
5e2ea617 | 1710 | |
fa4aa2d4 B |
1711 | pm_runtime_mark_last_busy(host->dev); |
1712 | pm_runtime_put_autosuspend(host->dev); | |
dd498eff | 1713 | |
d900f712 DK |
1714 | return 0; |
1715 | } | |
1716 | ||
70a3341a | 1717 | static int omap_hsmmc_regs_open(struct inode *inode, struct file *file) |
d900f712 | 1718 | { |
70a3341a | 1719 | return single_open(file, omap_hsmmc_regs_show, inode->i_private); |
d900f712 DK |
1720 | } |
1721 | ||
1722 | static const struct file_operations mmc_regs_fops = { | |
70a3341a | 1723 | .open = omap_hsmmc_regs_open, |
d900f712 DK |
1724 | .read = seq_read, |
1725 | .llseek = seq_lseek, | |
1726 | .release = single_release, | |
1727 | }; | |
1728 | ||
70a3341a | 1729 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1730 | { |
1731 | if (mmc->debugfs_root) | |
1732 | debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root, | |
1733 | mmc, &mmc_regs_fops); | |
1734 | } | |
1735 | ||
1736 | #else | |
1737 | ||
70a3341a | 1738 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1739 | { |
1740 | } | |
1741 | ||
1742 | #endif | |
1743 | ||
46856a68 RN |
1744 | #ifdef CONFIG_OF |
1745 | static u16 omap4_reg_offset = 0x100; | |
1746 | ||
1747 | static const struct of_device_id omap_mmc_of_match[] = { | |
1748 | { | |
1749 | .compatible = "ti,omap2-hsmmc", | |
1750 | }, | |
1751 | { | |
1752 | .compatible = "ti,omap3-hsmmc", | |
1753 | }, | |
1754 | { | |
1755 | .compatible = "ti,omap4-hsmmc", | |
1756 | .data = &omap4_reg_offset, | |
1757 | }, | |
1758 | {}, | |
b6d085f6 | 1759 | }; |
46856a68 RN |
1760 | MODULE_DEVICE_TABLE(of, omap_mmc_of_match); |
1761 | ||
1762 | static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) | |
1763 | { | |
1764 | struct omap_mmc_platform_data *pdata; | |
1765 | struct device_node *np = dev->of_node; | |
1766 | u32 bus_width; | |
1767 | ||
1768 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
1769 | if (!pdata) | |
1770 | return NULL; /* out of memory */ | |
1771 | ||
1772 | if (of_find_property(np, "ti,dual-volt", NULL)) | |
1773 | pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT; | |
1774 | ||
1775 | /* This driver only supports 1 slot */ | |
1776 | pdata->nr_slots = 1; | |
1777 | pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0); | |
1778 | pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0); | |
1779 | ||
1780 | if (of_find_property(np, "ti,non-removable", NULL)) { | |
1781 | pdata->slots[0].nonremovable = true; | |
1782 | pdata->slots[0].no_regulator_off_init = true; | |
1783 | } | |
1784 | of_property_read_u32(np, "ti,bus-width", &bus_width); | |
1785 | if (bus_width == 4) | |
1786 | pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA; | |
1787 | else if (bus_width == 8) | |
1788 | pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA; | |
1789 | ||
1790 | if (of_find_property(np, "ti,needs-special-reset", NULL)) | |
1791 | pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET; | |
1792 | ||
1793 | return pdata; | |
1794 | } | |
1795 | #else | |
1796 | static inline struct omap_mmc_platform_data | |
1797 | *of_get_hsmmc_pdata(struct device *dev) | |
1798 | { | |
1799 | return NULL; | |
1800 | } | |
1801 | #endif | |
1802 | ||
efa25fd3 | 1803 | static int __devinit omap_hsmmc_probe(struct platform_device *pdev) |
a45c6cb8 MC |
1804 | { |
1805 | struct omap_mmc_platform_data *pdata = pdev->dev.platform_data; | |
1806 | struct mmc_host *mmc; | |
70a3341a | 1807 | struct omap_hsmmc_host *host = NULL; |
a45c6cb8 | 1808 | struct resource *res; |
db0fefc5 | 1809 | int ret, irq; |
46856a68 RN |
1810 | const struct of_device_id *match; |
1811 | ||
1812 | match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); | |
1813 | if (match) { | |
1814 | pdata = of_get_hsmmc_pdata(&pdev->dev); | |
1815 | if (match->data) { | |
1816 | u16 *offsetp = match->data; | |
1817 | pdata->reg_offset = *offsetp; | |
1818 | } | |
1819 | } | |
a45c6cb8 MC |
1820 | |
1821 | if (pdata == NULL) { | |
1822 | dev_err(&pdev->dev, "Platform Data is missing\n"); | |
1823 | return -ENXIO; | |
1824 | } | |
1825 | ||
1826 | if (pdata->nr_slots == 0) { | |
1827 | dev_err(&pdev->dev, "No Slots\n"); | |
1828 | return -ENXIO; | |
1829 | } | |
1830 | ||
1831 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1832 | irq = platform_get_irq(pdev, 0); | |
1833 | if (res == NULL || irq < 0) | |
1834 | return -ENXIO; | |
1835 | ||
984b203a | 1836 | res = request_mem_region(res->start, resource_size(res), pdev->name); |
a45c6cb8 MC |
1837 | if (res == NULL) |
1838 | return -EBUSY; | |
1839 | ||
db0fefc5 AH |
1840 | ret = omap_hsmmc_gpio_init(pdata); |
1841 | if (ret) | |
1842 | goto err; | |
1843 | ||
70a3341a | 1844 | mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); |
a45c6cb8 MC |
1845 | if (!mmc) { |
1846 | ret = -ENOMEM; | |
db0fefc5 | 1847 | goto err_alloc; |
a45c6cb8 MC |
1848 | } |
1849 | ||
1850 | host = mmc_priv(mmc); | |
1851 | host->mmc = mmc; | |
1852 | host->pdata = pdata; | |
1853 | host->dev = &pdev->dev; | |
1854 | host->use_dma = 1; | |
1855 | host->dev->dma_mask = &pdata->dma_mask; | |
1856 | host->dma_ch = -1; | |
1857 | host->irq = irq; | |
a45c6cb8 | 1858 | host->slot_id = 0; |
fc307df8 | 1859 | host->mapbase = res->start + pdata->reg_offset; |
a45c6cb8 | 1860 | host->base = ioremap(host->mapbase, SZ_4K); |
6da20c89 | 1861 | host->power_mode = MMC_POWER_OFF; |
dba3c29e | 1862 | host->flags = AUTO_CMD12; |
9782aff8 | 1863 | host->next_data.cookie = 1; |
a45c6cb8 MC |
1864 | |
1865 | platform_set_drvdata(pdev, host); | |
a45c6cb8 | 1866 | |
7a8c2cef | 1867 | mmc->ops = &omap_hsmmc_ops; |
dd498eff | 1868 | |
e0eb2424 AH |
1869 | /* |
1870 | * If regulator_disable can only put vcc_aux to sleep then there is | |
1871 | * no off state. | |
1872 | */ | |
1873 | if (mmc_slot(host).vcc_aux_disable_is_sleep) | |
1874 | mmc_slot(host).no_off = 1; | |
1875 | ||
d418ed87 DM |
1876 | mmc->f_min = OMAP_MMC_MIN_CLOCK; |
1877 | ||
1878 | if (pdata->max_freq > 0) | |
1879 | mmc->f_max = pdata->max_freq; | |
1880 | else | |
1881 | mmc->f_max = OMAP_MMC_MAX_CLOCK; | |
a45c6cb8 | 1882 | |
4dffd7a2 | 1883 | spin_lock_init(&host->irq_lock); |
a45c6cb8 | 1884 | |
6f7607cc | 1885 | host->fclk = clk_get(&pdev->dev, "fck"); |
a45c6cb8 MC |
1886 | if (IS_ERR(host->fclk)) { |
1887 | ret = PTR_ERR(host->fclk); | |
1888 | host->fclk = NULL; | |
a45c6cb8 MC |
1889 | goto err1; |
1890 | } | |
1891 | ||
9b68256c PW |
1892 | if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) { |
1893 | dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n"); | |
1894 | mmc->caps2 |= MMC_CAP2_NO_MULTI_READ; | |
1895 | } | |
dd498eff | 1896 | |
fa4aa2d4 B |
1897 | pm_runtime_enable(host->dev); |
1898 | pm_runtime_get_sync(host->dev); | |
1899 | pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY); | |
1900 | pm_runtime_use_autosuspend(host->dev); | |
a45c6cb8 | 1901 | |
92a3aebf B |
1902 | omap_hsmmc_context_save(host); |
1903 | ||
cd03d9a8 RN |
1904 | host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); |
1905 | /* | |
1906 | * MMC can still work without debounce clock. | |
1907 | */ | |
1908 | if (IS_ERR(host->dbclk)) { | |
1909 | dev_warn(mmc_dev(host->mmc), "Failed to get debounce clk\n"); | |
1910 | host->dbclk = NULL; | |
1911 | } else if (clk_enable(host->dbclk) != 0) { | |
1912 | dev_warn(mmc_dev(host->mmc), "Failed to enable debounce clk\n"); | |
1913 | clk_put(host->dbclk); | |
1914 | host->dbclk = NULL; | |
2bec0893 | 1915 | } |
a45c6cb8 | 1916 | |
0ccd76d4 JY |
1917 | /* Since we do only SG emulation, we can have as many segs |
1918 | * as we want. */ | |
a36274e0 | 1919 | mmc->max_segs = 1024; |
0ccd76d4 | 1920 | |
a45c6cb8 MC |
1921 | mmc->max_blk_size = 512; /* Block Length at max can be 1024 */ |
1922 | mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */ | |
1923 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
1924 | mmc->max_seg_size = mmc->max_req_size; | |
1925 | ||
13189e78 | 1926 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
93caf8e6 | 1927 | MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE; |
a45c6cb8 | 1928 | |
3a63833e SG |
1929 | mmc->caps |= mmc_slot(host).caps; |
1930 | if (mmc->caps & MMC_CAP_8_BIT_DATA) | |
a45c6cb8 MC |
1931 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
1932 | ||
191d1f1d | 1933 | if (mmc_slot(host).nonremovable) |
23d99bb9 AH |
1934 | mmc->caps |= MMC_CAP_NONREMOVABLE; |
1935 | ||
6fdc75de EP |
1936 | mmc->pm_caps = mmc_slot(host).pm_caps; |
1937 | ||
70a3341a | 1938 | omap_hsmmc_conf_bus_power(host); |
a45c6cb8 | 1939 | |
b7bf773b B |
1940 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); |
1941 | if (!res) { | |
1942 | dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); | |
1943 | goto err_irq; | |
1944 | } | |
1945 | host->dma_line_tx = res->start; | |
1946 | ||
1947 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); | |
1948 | if (!res) { | |
1949 | dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); | |
f3e2f1dd GI |
1950 | goto err_irq; |
1951 | } | |
b7bf773b | 1952 | host->dma_line_rx = res->start; |
a45c6cb8 MC |
1953 | |
1954 | /* Request IRQ for MMC operations */ | |
d9618e9f | 1955 | ret = request_irq(host->irq, omap_hsmmc_irq, 0, |
a45c6cb8 MC |
1956 | mmc_hostname(mmc), host); |
1957 | if (ret) { | |
1958 | dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n"); | |
1959 | goto err_irq; | |
1960 | } | |
1961 | ||
1962 | if (pdata->init != NULL) { | |
1963 | if (pdata->init(&pdev->dev) != 0) { | |
70a3341a DK |
1964 | dev_dbg(mmc_dev(host->mmc), |
1965 | "Unable to configure MMC IRQs\n"); | |
a45c6cb8 MC |
1966 | goto err_irq_cd_init; |
1967 | } | |
1968 | } | |
db0fefc5 | 1969 | |
b702b106 | 1970 | if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) { |
db0fefc5 AH |
1971 | ret = omap_hsmmc_reg_get(host); |
1972 | if (ret) | |
1973 | goto err_reg; | |
1974 | host->use_reg = 1; | |
1975 | } | |
1976 | ||
b583f26d | 1977 | mmc->ocr_avail = mmc_slot(host).ocr_mask; |
a45c6cb8 MC |
1978 | |
1979 | /* Request IRQ for card detect */ | |
e1a55f5e | 1980 | if ((mmc_slot(host).card_detect_irq)) { |
7efab4f3 N |
1981 | ret = request_threaded_irq(mmc_slot(host).card_detect_irq, |
1982 | NULL, | |
1983 | omap_hsmmc_detect, | |
1984 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, | |
1985 | mmc_hostname(mmc), host); | |
a45c6cb8 MC |
1986 | if (ret) { |
1987 | dev_dbg(mmc_dev(host->mmc), | |
1988 | "Unable to grab MMC CD IRQ\n"); | |
1989 | goto err_irq_cd; | |
1990 | } | |
72f2e2c7 | 1991 | pdata->suspend = omap_hsmmc_suspend_cdirq; |
1992 | pdata->resume = omap_hsmmc_resume_cdirq; | |
a45c6cb8 MC |
1993 | } |
1994 | ||
b417577d | 1995 | omap_hsmmc_disable_irq(host); |
a45c6cb8 | 1996 | |
b62f6228 AH |
1997 | omap_hsmmc_protect_card(host); |
1998 | ||
a45c6cb8 MC |
1999 | mmc_add_host(mmc); |
2000 | ||
191d1f1d | 2001 | if (mmc_slot(host).name != NULL) { |
a45c6cb8 MC |
2002 | ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); |
2003 | if (ret < 0) | |
2004 | goto err_slot_name; | |
2005 | } | |
191d1f1d | 2006 | if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) { |
a45c6cb8 MC |
2007 | ret = device_create_file(&mmc->class_dev, |
2008 | &dev_attr_cover_switch); | |
2009 | if (ret < 0) | |
db0fefc5 | 2010 | goto err_slot_name; |
a45c6cb8 MC |
2011 | } |
2012 | ||
70a3341a | 2013 | omap_hsmmc_debugfs(mmc); |
fa4aa2d4 B |
2014 | pm_runtime_mark_last_busy(host->dev); |
2015 | pm_runtime_put_autosuspend(host->dev); | |
d900f712 | 2016 | |
a45c6cb8 MC |
2017 | return 0; |
2018 | ||
a45c6cb8 MC |
2019 | err_slot_name: |
2020 | mmc_remove_host(mmc); | |
a45c6cb8 | 2021 | free_irq(mmc_slot(host).card_detect_irq, host); |
db0fefc5 AH |
2022 | err_irq_cd: |
2023 | if (host->use_reg) | |
2024 | omap_hsmmc_reg_put(host); | |
2025 | err_reg: | |
2026 | if (host->pdata->cleanup) | |
2027 | host->pdata->cleanup(&pdev->dev); | |
a45c6cb8 MC |
2028 | err_irq_cd_init: |
2029 | free_irq(host->irq, host); | |
2030 | err_irq: | |
d59d77ed | 2031 | pm_runtime_put_sync(host->dev); |
37f6190d | 2032 | pm_runtime_disable(host->dev); |
a45c6cb8 | 2033 | clk_put(host->fclk); |
cd03d9a8 | 2034 | if (host->dbclk) { |
a45c6cb8 MC |
2035 | clk_disable(host->dbclk); |
2036 | clk_put(host->dbclk); | |
2037 | } | |
a45c6cb8 MC |
2038 | err1: |
2039 | iounmap(host->base); | |
db0fefc5 AH |
2040 | platform_set_drvdata(pdev, NULL); |
2041 | mmc_free_host(mmc); | |
2042 | err_alloc: | |
2043 | omap_hsmmc_gpio_free(pdata); | |
a45c6cb8 | 2044 | err: |
984b203a | 2045 | release_mem_region(res->start, resource_size(res)); |
a45c6cb8 MC |
2046 | return ret; |
2047 | } | |
2048 | ||
efa25fd3 | 2049 | static int __devexit omap_hsmmc_remove(struct platform_device *pdev) |
a45c6cb8 | 2050 | { |
70a3341a | 2051 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
a45c6cb8 MC |
2052 | struct resource *res; |
2053 | ||
927ce944 FB |
2054 | pm_runtime_get_sync(host->dev); |
2055 | mmc_remove_host(host->mmc); | |
2056 | if (host->use_reg) | |
2057 | omap_hsmmc_reg_put(host); | |
2058 | if (host->pdata->cleanup) | |
2059 | host->pdata->cleanup(&pdev->dev); | |
2060 | free_irq(host->irq, host); | |
2061 | if (mmc_slot(host).card_detect_irq) | |
2062 | free_irq(mmc_slot(host).card_detect_irq, host); | |
a45c6cb8 | 2063 | |
927ce944 FB |
2064 | pm_runtime_put_sync(host->dev); |
2065 | pm_runtime_disable(host->dev); | |
2066 | clk_put(host->fclk); | |
cd03d9a8 | 2067 | if (host->dbclk) { |
927ce944 FB |
2068 | clk_disable(host->dbclk); |
2069 | clk_put(host->dbclk); | |
a45c6cb8 MC |
2070 | } |
2071 | ||
927ce944 FB |
2072 | mmc_free_host(host->mmc); |
2073 | iounmap(host->base); | |
2074 | omap_hsmmc_gpio_free(pdev->dev.platform_data); | |
2075 | ||
a45c6cb8 MC |
2076 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2077 | if (res) | |
984b203a | 2078 | release_mem_region(res->start, resource_size(res)); |
a45c6cb8 MC |
2079 | platform_set_drvdata(pdev, NULL); |
2080 | ||
2081 | return 0; | |
2082 | } | |
2083 | ||
2084 | #ifdef CONFIG_PM | |
a791daa1 | 2085 | static int omap_hsmmc_suspend(struct device *dev) |
a45c6cb8 MC |
2086 | { |
2087 | int ret = 0; | |
927ce944 | 2088 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
a45c6cb8 | 2089 | |
927ce944 | 2090 | if (!host) |
a45c6cb8 MC |
2091 | return 0; |
2092 | ||
927ce944 FB |
2093 | if (host && host->suspended) |
2094 | return 0; | |
fa4aa2d4 | 2095 | |
927ce944 FB |
2096 | pm_runtime_get_sync(host->dev); |
2097 | host->suspended = 1; | |
2098 | if (host->pdata->suspend) { | |
2099 | ret = host->pdata->suspend(dev, host->slot_id); | |
31f9d463 | 2100 | if (ret) { |
927ce944 FB |
2101 | dev_dbg(dev, "Unable to handle MMC board" |
2102 | " level suspend\n"); | |
a6b2240d | 2103 | host->suspended = 0; |
927ce944 | 2104 | return ret; |
a6b2240d | 2105 | } |
927ce944 FB |
2106 | } |
2107 | ret = mmc_suspend_host(host->mmc); | |
31f9d463 | 2108 | |
927ce944 FB |
2109 | if (ret) { |
2110 | host->suspended = 0; | |
2111 | if (host->pdata->resume) { | |
2112 | ret = host->pdata->resume(dev, host->slot_id); | |
2113 | if (ret) | |
2114 | dev_dbg(dev, "Unmask interrupt failed\n"); | |
31f9d463 | 2115 | } |
927ce944 FB |
2116 | goto err; |
2117 | } | |
31f9d463 | 2118 | |
927ce944 FB |
2119 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) { |
2120 | omap_hsmmc_disable_irq(host); | |
2121 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
2122 | OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); | |
a45c6cb8 | 2123 | } |
927ce944 | 2124 | |
cd03d9a8 | 2125 | if (host->dbclk) |
927ce944 | 2126 | clk_disable(host->dbclk); |
31f9d463 EP |
2127 | err: |
2128 | pm_runtime_put_sync(host->dev); | |
a45c6cb8 MC |
2129 | return ret; |
2130 | } | |
2131 | ||
2132 | /* Routine to resume the MMC device */ | |
a791daa1 | 2133 | static int omap_hsmmc_resume(struct device *dev) |
a45c6cb8 MC |
2134 | { |
2135 | int ret = 0; | |
927ce944 FB |
2136 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
2137 | ||
2138 | if (!host) | |
2139 | return 0; | |
a45c6cb8 MC |
2140 | |
2141 | if (host && !host->suspended) | |
2142 | return 0; | |
2143 | ||
927ce944 | 2144 | pm_runtime_get_sync(host->dev); |
11dd62a7 | 2145 | |
cd03d9a8 | 2146 | if (host->dbclk) |
927ce944 | 2147 | clk_enable(host->dbclk); |
2bec0893 | 2148 | |
927ce944 FB |
2149 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) |
2150 | omap_hsmmc_conf_bus_power(host); | |
1b331e69 | 2151 | |
927ce944 FB |
2152 | if (host->pdata->resume) { |
2153 | ret = host->pdata->resume(dev, host->slot_id); | |
2154 | if (ret) | |
2155 | dev_dbg(dev, "Unmask interrupt failed\n"); | |
2156 | } | |
a45c6cb8 | 2157 | |
927ce944 | 2158 | omap_hsmmc_protect_card(host); |
b62f6228 | 2159 | |
927ce944 FB |
2160 | /* Notify the core to resume the host */ |
2161 | ret = mmc_resume_host(host->mmc); | |
2162 | if (ret == 0) | |
2163 | host->suspended = 0; | |
fa4aa2d4 | 2164 | |
927ce944 FB |
2165 | pm_runtime_mark_last_busy(host->dev); |
2166 | pm_runtime_put_autosuspend(host->dev); | |
a45c6cb8 MC |
2167 | |
2168 | return ret; | |
2169 | ||
a45c6cb8 MC |
2170 | } |
2171 | ||
2172 | #else | |
70a3341a DK |
2173 | #define omap_hsmmc_suspend NULL |
2174 | #define omap_hsmmc_resume NULL | |
a45c6cb8 MC |
2175 | #endif |
2176 | ||
fa4aa2d4 B |
2177 | static int omap_hsmmc_runtime_suspend(struct device *dev) |
2178 | { | |
2179 | struct omap_hsmmc_host *host; | |
2180 | ||
2181 | host = platform_get_drvdata(to_platform_device(dev)); | |
2182 | omap_hsmmc_context_save(host); | |
927ce944 | 2183 | dev_dbg(dev, "disabled\n"); |
fa4aa2d4 B |
2184 | |
2185 | return 0; | |
2186 | } | |
2187 | ||
2188 | static int omap_hsmmc_runtime_resume(struct device *dev) | |
2189 | { | |
2190 | struct omap_hsmmc_host *host; | |
2191 | ||
2192 | host = platform_get_drvdata(to_platform_device(dev)); | |
2193 | omap_hsmmc_context_restore(host); | |
927ce944 | 2194 | dev_dbg(dev, "enabled\n"); |
fa4aa2d4 B |
2195 | |
2196 | return 0; | |
2197 | } | |
2198 | ||
a791daa1 | 2199 | static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { |
70a3341a DK |
2200 | .suspend = omap_hsmmc_suspend, |
2201 | .resume = omap_hsmmc_resume, | |
fa4aa2d4 B |
2202 | .runtime_suspend = omap_hsmmc_runtime_suspend, |
2203 | .runtime_resume = omap_hsmmc_runtime_resume, | |
a791daa1 KH |
2204 | }; |
2205 | ||
2206 | static struct platform_driver omap_hsmmc_driver = { | |
efa25fd3 FB |
2207 | .probe = omap_hsmmc_probe, |
2208 | .remove = __devexit_p(omap_hsmmc_remove), | |
a45c6cb8 MC |
2209 | .driver = { |
2210 | .name = DRIVER_NAME, | |
2211 | .owner = THIS_MODULE, | |
a791daa1 | 2212 | .pm = &omap_hsmmc_dev_pm_ops, |
46856a68 | 2213 | .of_match_table = of_match_ptr(omap_mmc_of_match), |
a45c6cb8 MC |
2214 | }, |
2215 | }; | |
2216 | ||
b796450b | 2217 | module_platform_driver(omap_hsmmc_driver); |
a45c6cb8 MC |
2218 | MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver"); |
2219 | MODULE_LICENSE("GPL"); | |
2220 | MODULE_ALIAS("platform:" DRIVER_NAME); | |
2221 | MODULE_AUTHOR("Texas Instruments Inc"); |