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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 | 21 | #include <linux/debugfs.h> |
c5c98927 | 22 | #include <linux/dmaengine.h> |
d900f712 | 23 | #include <linux/seq_file.h> |
a45c6cb8 MC |
24 | #include <linux/interrupt.h> |
25 | #include <linux/delay.h> | |
26 | #include <linux/dma-mapping.h> | |
27 | #include <linux/platform_device.h> | |
a45c6cb8 MC |
28 | #include <linux/timer.h> |
29 | #include <linux/clk.h> | |
46856a68 RN |
30 | #include <linux/of.h> |
31 | #include <linux/of_gpio.h> | |
32 | #include <linux/of_device.h> | |
a45c6cb8 | 33 | #include <linux/mmc/host.h> |
13189e78 | 34 | #include <linux/mmc/core.h> |
93caf8e6 | 35 | #include <linux/mmc/mmc.h> |
a45c6cb8 MC |
36 | #include <linux/io.h> |
37 | #include <linux/semaphore.h> | |
db0fefc5 AH |
38 | #include <linux/gpio.h> |
39 | #include <linux/regulator/consumer.h> | |
fa4aa2d4 | 40 | #include <linux/pm_runtime.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 MC |
87 | #define INIT_STREAM (1 << 1) |
88 | #define DP_SELECT (1 << 21) | |
89 | #define DDIR (1 << 4) | |
90 | #define DMA_EN 0x1 | |
91 | #define MSBS (1 << 5) | |
92 | #define BCE (1 << 1) | |
93 | #define FOUR_BIT (1 << 1) | |
03b5d924 | 94 | #define DDR (1 << 19) |
73153010 | 95 | #define DW8 (1 << 5) |
a45c6cb8 MC |
96 | #define CC 0x1 |
97 | #define TC 0x02 | |
98 | #define OD 0x1 | |
99 | #define ERR (1 << 15) | |
100 | #define CMD_TIMEOUT (1 << 16) | |
101 | #define DATA_TIMEOUT (1 << 20) | |
102 | #define CMD_CRC (1 << 17) | |
103 | #define DATA_CRC (1 << 21) | |
104 | #define CARD_ERR (1 << 28) | |
105 | #define STAT_CLEAR 0xFFFFFFFF | |
106 | #define INIT_STREAM_CMD 0x00000000 | |
107 | #define DUAL_VOLT_OCR_BIT 7 | |
108 | #define SRC (1 << 25) | |
109 | #define SRD (1 << 26) | |
11dd62a7 DK |
110 | #define SOFTRESET (1 << 1) |
111 | #define RESETDONE (1 << 0) | |
a45c6cb8 | 112 | |
fa4aa2d4 | 113 | #define MMC_AUTOSUSPEND_DELAY 100 |
a45c6cb8 | 114 | #define MMC_TIMEOUT_MS 20 |
6b206efe AS |
115 | #define OMAP_MMC_MIN_CLOCK 400000 |
116 | #define OMAP_MMC_MAX_CLOCK 52000000 | |
0005ae73 | 117 | #define DRIVER_NAME "omap_hsmmc" |
a45c6cb8 MC |
118 | |
119 | /* | |
120 | * One controller can have multiple slots, like on some omap boards using | |
121 | * omap.c controller driver. Luckily this is not currently done on any known | |
122 | * omap_hsmmc.c device. | |
123 | */ | |
124 | #define mmc_slot(host) (host->pdata->slots[host->slot_id]) | |
125 | ||
126 | /* | |
127 | * MMC Host controller read/write API's | |
128 | */ | |
129 | #define OMAP_HSMMC_READ(base, reg) \ | |
130 | __raw_readl((base) + OMAP_HSMMC_##reg) | |
131 | ||
132 | #define OMAP_HSMMC_WRITE(base, reg, val) \ | |
133 | __raw_writel((val), (base) + OMAP_HSMMC_##reg) | |
134 | ||
9782aff8 PF |
135 | struct omap_hsmmc_next { |
136 | unsigned int dma_len; | |
137 | s32 cookie; | |
138 | }; | |
139 | ||
70a3341a | 140 | struct omap_hsmmc_host { |
a45c6cb8 MC |
141 | struct device *dev; |
142 | struct mmc_host *mmc; | |
143 | struct mmc_request *mrq; | |
144 | struct mmc_command *cmd; | |
145 | struct mmc_data *data; | |
146 | struct clk *fclk; | |
a45c6cb8 | 147 | struct clk *dbclk; |
db0fefc5 AH |
148 | /* |
149 | * vcc == configured supply | |
150 | * vcc_aux == optional | |
151 | * - MMC1, supply for DAT4..DAT7 | |
152 | * - MMC2/MMC2, external level shifter voltage supply, for | |
153 | * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) | |
154 | */ | |
155 | struct regulator *vcc; | |
156 | struct regulator *vcc_aux; | |
a45c6cb8 MC |
157 | void __iomem *base; |
158 | resource_size_t mapbase; | |
4dffd7a2 | 159 | spinlock_t irq_lock; /* Prevent races with irq handler */ |
a45c6cb8 | 160 | unsigned int dma_len; |
0ccd76d4 | 161 | unsigned int dma_sg_idx; |
a45c6cb8 | 162 | unsigned char bus_mode; |
a3621465 | 163 | unsigned char power_mode; |
a45c6cb8 MC |
164 | u32 *buffer; |
165 | u32 bytesleft; | |
166 | int suspended; | |
167 | int irq; | |
26b88520 | 168 | int use_dma, dma_ch; |
c5c98927 RK |
169 | struct dma_chan *tx_chan; |
170 | struct dma_chan *rx_chan; | |
a45c6cb8 | 171 | int slot_id; |
4a694dc9 | 172 | int response_busy; |
11dd62a7 | 173 | int context_loss; |
623821f7 | 174 | int vdd; |
b62f6228 AH |
175 | int protect_card; |
176 | int reqs_blocked; | |
db0fefc5 | 177 | int use_reg; |
b417577d | 178 | int req_in_progress; |
9782aff8 | 179 | struct omap_hsmmc_next next_data; |
11dd62a7 | 180 | |
a45c6cb8 MC |
181 | struct omap_mmc_platform_data *pdata; |
182 | }; | |
183 | ||
db0fefc5 AH |
184 | static int omap_hsmmc_card_detect(struct device *dev, int slot) |
185 | { | |
186 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
187 | ||
188 | /* NOTE: assumes card detect signal is active-low */ | |
189 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
190 | } | |
191 | ||
192 | static int omap_hsmmc_get_wp(struct device *dev, int slot) | |
193 | { | |
194 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
195 | ||
196 | /* NOTE: assumes write protect signal is active-high */ | |
197 | return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); | |
198 | } | |
199 | ||
200 | static int omap_hsmmc_get_cover_state(struct device *dev, int slot) | |
201 | { | |
202 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
203 | ||
204 | /* NOTE: assumes card detect signal is active-low */ | |
205 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
206 | } | |
207 | ||
208 | #ifdef CONFIG_PM | |
209 | ||
210 | static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot) | |
211 | { | |
212 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
213 | ||
214 | disable_irq(mmc->slots[0].card_detect_irq); | |
215 | return 0; | |
216 | } | |
217 | ||
218 | static int omap_hsmmc_resume_cdirq(struct device *dev, int slot) | |
219 | { | |
220 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
221 | ||
222 | enable_irq(mmc->slots[0].card_detect_irq); | |
223 | return 0; | |
224 | } | |
225 | ||
226 | #else | |
227 | ||
228 | #define omap_hsmmc_suspend_cdirq NULL | |
229 | #define omap_hsmmc_resume_cdirq NULL | |
230 | ||
231 | #endif | |
232 | ||
b702b106 AH |
233 | #ifdef CONFIG_REGULATOR |
234 | ||
69b07ece | 235 | static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, |
db0fefc5 AH |
236 | int vdd) |
237 | { | |
238 | struct omap_hsmmc_host *host = | |
239 | platform_get_drvdata(to_platform_device(dev)); | |
240 | int ret = 0; | |
241 | ||
242 | /* | |
243 | * If we don't see a Vcc regulator, assume it's a fixed | |
244 | * voltage always-on regulator. | |
245 | */ | |
246 | if (!host->vcc) | |
247 | return 0; | |
1f84b71b RN |
248 | /* |
249 | * With DT, never turn OFF the regulator. This is because | |
250 | * the pbias cell programming support is still missing when | |
251 | * booting with Device tree | |
252 | */ | |
4d048f91 | 253 | if (dev->of_node && !vdd) |
1f84b71b | 254 | return 0; |
db0fefc5 AH |
255 | |
256 | if (mmc_slot(host).before_set_reg) | |
257 | mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); | |
258 | ||
259 | /* | |
260 | * Assume Vcc regulator is used only to power the card ... OMAP | |
261 | * VDDS is used to power the pins, optionally with a transceiver to | |
262 | * support cards using voltages other than VDDS (1.8V nominal). When a | |
263 | * transceiver is used, DAT3..7 are muxed as transceiver control pins. | |
264 | * | |
265 | * In some cases this regulator won't support enable/disable; | |
266 | * e.g. it's a fixed rail for a WLAN chip. | |
267 | * | |
268 | * In other cases vcc_aux switches interface power. Example, for | |
269 | * eMMC cards it represents VccQ. Sometimes transceivers or SDIO | |
270 | * chips/cards need an interface voltage rail too. | |
271 | */ | |
272 | if (power_on) { | |
99fc5131 | 273 | ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); |
db0fefc5 AH |
274 | /* Enable interface voltage rail, if needed */ |
275 | if (ret == 0 && host->vcc_aux) { | |
276 | ret = regulator_enable(host->vcc_aux); | |
277 | if (ret < 0) | |
99fc5131 LW |
278 | ret = mmc_regulator_set_ocr(host->mmc, |
279 | host->vcc, 0); | |
db0fefc5 AH |
280 | } |
281 | } else { | |
99fc5131 | 282 | /* Shut down the rail */ |
6da20c89 AH |
283 | if (host->vcc_aux) |
284 | ret = regulator_disable(host->vcc_aux); | |
99fc5131 LW |
285 | if (!ret) { |
286 | /* Then proceed to shut down the local regulator */ | |
287 | ret = mmc_regulator_set_ocr(host->mmc, | |
288 | host->vcc, 0); | |
289 | } | |
db0fefc5 AH |
290 | } |
291 | ||
292 | if (mmc_slot(host).after_set_reg) | |
293 | mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); | |
294 | ||
295 | return ret; | |
296 | } | |
297 | ||
db0fefc5 AH |
298 | static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) |
299 | { | |
300 | struct regulator *reg; | |
64be9782 | 301 | int ocr_value = 0; |
db0fefc5 | 302 | |
1cb9af49 | 303 | mmc_slot(host).set_power = omap_hsmmc_set_power; |
db0fefc5 AH |
304 | |
305 | reg = regulator_get(host->dev, "vmmc"); | |
306 | if (IS_ERR(reg)) { | |
307 | dev_dbg(host->dev, "vmmc regulator missing\n"); | |
db0fefc5 AH |
308 | } else { |
309 | host->vcc = reg; | |
64be9782 | 310 | ocr_value = mmc_regulator_get_ocrmask(reg); |
311 | if (!mmc_slot(host).ocr_mask) { | |
312 | mmc_slot(host).ocr_mask = ocr_value; | |
313 | } else { | |
314 | if (!(mmc_slot(host).ocr_mask & ocr_value)) { | |
2cecdf00 | 315 | dev_err(host->dev, "ocrmask %x is not supported\n", |
e3f1adb6 | 316 | mmc_slot(host).ocr_mask); |
64be9782 | 317 | mmc_slot(host).ocr_mask = 0; |
318 | return -EINVAL; | |
319 | } | |
320 | } | |
db0fefc5 AH |
321 | |
322 | /* Allow an aux regulator */ | |
323 | reg = regulator_get(host->dev, "vmmc_aux"); | |
324 | host->vcc_aux = IS_ERR(reg) ? NULL : reg; | |
325 | ||
b1c1df7a B |
326 | /* For eMMC do not power off when not in sleep state */ |
327 | if (mmc_slot(host).no_regulator_off_init) | |
328 | return 0; | |
db0fefc5 AH |
329 | /* |
330 | * UGLY HACK: workaround regulator framework bugs. | |
331 | * When the bootloader leaves a supply active, it's | |
332 | * initialized with zero usecount ... and we can't | |
333 | * disable it without first enabling it. Until the | |
334 | * framework is fixed, we need a workaround like this | |
335 | * (which is safe for MMC, but not in general). | |
336 | */ | |
e840ce13 AH |
337 | if (regulator_is_enabled(host->vcc) > 0 || |
338 | (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) { | |
339 | int vdd = ffs(mmc_slot(host).ocr_mask) - 1; | |
340 | ||
341 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
342 | 1, vdd); | |
343 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
344 | 0, 0); | |
db0fefc5 AH |
345 | } |
346 | } | |
347 | ||
348 | return 0; | |
db0fefc5 AH |
349 | } |
350 | ||
351 | static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
352 | { | |
353 | regulator_put(host->vcc); | |
354 | regulator_put(host->vcc_aux); | |
355 | mmc_slot(host).set_power = NULL; | |
db0fefc5 AH |
356 | } |
357 | ||
b702b106 AH |
358 | static inline int omap_hsmmc_have_reg(void) |
359 | { | |
360 | return 1; | |
361 | } | |
362 | ||
363 | #else | |
364 | ||
365 | static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) | |
366 | { | |
367 | return -EINVAL; | |
368 | } | |
369 | ||
370 | static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
371 | { | |
372 | } | |
373 | ||
374 | static inline int omap_hsmmc_have_reg(void) | |
375 | { | |
376 | return 0; | |
377 | } | |
378 | ||
379 | #endif | |
380 | ||
381 | static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) | |
382 | { | |
383 | int ret; | |
384 | ||
385 | if (gpio_is_valid(pdata->slots[0].switch_pin)) { | |
b702b106 AH |
386 | if (pdata->slots[0].cover) |
387 | pdata->slots[0].get_cover_state = | |
388 | omap_hsmmc_get_cover_state; | |
389 | else | |
390 | pdata->slots[0].card_detect = omap_hsmmc_card_detect; | |
391 | pdata->slots[0].card_detect_irq = | |
392 | gpio_to_irq(pdata->slots[0].switch_pin); | |
393 | ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd"); | |
394 | if (ret) | |
395 | return ret; | |
396 | ret = gpio_direction_input(pdata->slots[0].switch_pin); | |
397 | if (ret) | |
398 | goto err_free_sp; | |
399 | } else | |
400 | pdata->slots[0].switch_pin = -EINVAL; | |
401 | ||
402 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) { | |
403 | pdata->slots[0].get_ro = omap_hsmmc_get_wp; | |
404 | ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp"); | |
405 | if (ret) | |
406 | goto err_free_cd; | |
407 | ret = gpio_direction_input(pdata->slots[0].gpio_wp); | |
408 | if (ret) | |
409 | goto err_free_wp; | |
410 | } else | |
411 | pdata->slots[0].gpio_wp = -EINVAL; | |
412 | ||
413 | return 0; | |
414 | ||
415 | err_free_wp: | |
416 | gpio_free(pdata->slots[0].gpio_wp); | |
417 | err_free_cd: | |
418 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
419 | err_free_sp: | |
420 | gpio_free(pdata->slots[0].switch_pin); | |
421 | return ret; | |
422 | } | |
423 | ||
424 | static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) | |
425 | { | |
426 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) | |
427 | gpio_free(pdata->slots[0].gpio_wp); | |
428 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
429 | gpio_free(pdata->slots[0].switch_pin); | |
430 | } | |
431 | ||
e0c7f99b AS |
432 | /* |
433 | * Start clock to the card | |
434 | */ | |
435 | static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host) | |
436 | { | |
437 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
438 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); | |
439 | } | |
440 | ||
a45c6cb8 MC |
441 | /* |
442 | * Stop clock to the card | |
443 | */ | |
70a3341a | 444 | static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
445 | { |
446 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
447 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); | |
448 | if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0) | |
449 | dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n"); | |
450 | } | |
451 | ||
93caf8e6 AH |
452 | static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, |
453 | struct mmc_command *cmd) | |
b417577d AH |
454 | { |
455 | unsigned int irq_mask; | |
456 | ||
457 | if (host->use_dma) | |
458 | irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE); | |
459 | else | |
460 | irq_mask = INT_EN_MASK; | |
461 | ||
93caf8e6 AH |
462 | /* Disable timeout for erases */ |
463 | if (cmd->opcode == MMC_ERASE) | |
464 | irq_mask &= ~DTO_ENABLE; | |
465 | ||
b417577d AH |
466 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
467 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
468 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); | |
469 | } | |
470 | ||
471 | static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) | |
472 | { | |
473 | OMAP_HSMMC_WRITE(host->base, ISE, 0); | |
474 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
475 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
476 | } | |
477 | ||
ac330f44 | 478 | /* Calculate divisor for the given clock frequency */ |
d83b6e03 | 479 | static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios) |
ac330f44 AS |
480 | { |
481 | u16 dsor = 0; | |
482 | ||
483 | if (ios->clock) { | |
d83b6e03 | 484 | dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock); |
ac330f44 AS |
485 | if (dsor > 250) |
486 | dsor = 250; | |
487 | } | |
488 | ||
489 | return dsor; | |
490 | } | |
491 | ||
5934df2f AS |
492 | static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host) |
493 | { | |
494 | struct mmc_ios *ios = &host->mmc->ios; | |
495 | unsigned long regval; | |
496 | unsigned long timeout; | |
497 | ||
498 | dev_dbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock); | |
499 | ||
500 | omap_hsmmc_stop_clock(host); | |
501 | ||
502 | regval = OMAP_HSMMC_READ(host->base, SYSCTL); | |
503 | regval = regval & ~(CLKD_MASK | DTO_MASK); | |
d83b6e03 | 504 | regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16); |
5934df2f AS |
505 | OMAP_HSMMC_WRITE(host->base, SYSCTL, regval); |
506 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
507 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); | |
508 | ||
509 | /* Wait till the ICS bit is set */ | |
510 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
511 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS | |
512 | && time_before(jiffies, timeout)) | |
513 | cpu_relax(); | |
514 | ||
515 | omap_hsmmc_start_clock(host); | |
516 | } | |
517 | ||
3796fb8a AS |
518 | static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host) |
519 | { | |
520 | struct mmc_ios *ios = &host->mmc->ios; | |
521 | u32 con; | |
522 | ||
523 | con = OMAP_HSMMC_READ(host->base, CON); | |
03b5d924 B |
524 | if (ios->timing == MMC_TIMING_UHS_DDR50) |
525 | con |= DDR; /* configure in DDR mode */ | |
526 | else | |
527 | con &= ~DDR; | |
3796fb8a AS |
528 | switch (ios->bus_width) { |
529 | case MMC_BUS_WIDTH_8: | |
530 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); | |
531 | break; | |
532 | case MMC_BUS_WIDTH_4: | |
533 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
534 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
535 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); | |
536 | break; | |
537 | case MMC_BUS_WIDTH_1: | |
538 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
539 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
540 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); | |
541 | break; | |
542 | } | |
543 | } | |
544 | ||
545 | static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host) | |
546 | { | |
547 | struct mmc_ios *ios = &host->mmc->ios; | |
548 | u32 con; | |
549 | ||
550 | con = OMAP_HSMMC_READ(host->base, CON); | |
551 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
552 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); | |
553 | else | |
554 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); | |
555 | } | |
556 | ||
11dd62a7 DK |
557 | #ifdef CONFIG_PM |
558 | ||
559 | /* | |
560 | * Restore the MMC host context, if it was lost as result of a | |
561 | * power state change. | |
562 | */ | |
70a3341a | 563 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
564 | { |
565 | struct mmc_ios *ios = &host->mmc->ios; | |
566 | struct omap_mmc_platform_data *pdata = host->pdata; | |
567 | int context_loss = 0; | |
3796fb8a | 568 | u32 hctl, capa; |
11dd62a7 DK |
569 | unsigned long timeout; |
570 | ||
571 | if (pdata->get_context_loss_count) { | |
572 | context_loss = pdata->get_context_loss_count(host->dev); | |
573 | if (context_loss < 0) | |
574 | return 1; | |
575 | } | |
576 | ||
577 | dev_dbg(mmc_dev(host->mmc), "context was %slost\n", | |
578 | context_loss == host->context_loss ? "not " : ""); | |
579 | if (host->context_loss == context_loss) | |
580 | return 1; | |
581 | ||
582 | /* Wait for hardware reset */ | |
583 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
584 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE | |
585 | && time_before(jiffies, timeout)) | |
586 | ; | |
587 | ||
588 | /* Do software reset */ | |
589 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, SOFTRESET); | |
590 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
591 | while ((OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) != RESETDONE | |
592 | && time_before(jiffies, timeout)) | |
593 | ; | |
594 | ||
595 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, | |
596 | OMAP_HSMMC_READ(host->base, SYSCONFIG) | AUTOIDLE); | |
597 | ||
c2200efb | 598 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
11dd62a7 DK |
599 | if (host->power_mode != MMC_POWER_OFF && |
600 | (1 << ios->vdd) <= MMC_VDD_23_24) | |
601 | hctl = SDVS18; | |
602 | else | |
603 | hctl = SDVS30; | |
604 | capa = VS30 | VS18; | |
605 | } else { | |
606 | hctl = SDVS18; | |
607 | capa = VS18; | |
608 | } | |
609 | ||
610 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
611 | OMAP_HSMMC_READ(host->base, HCTL) | hctl); | |
612 | ||
613 | OMAP_HSMMC_WRITE(host->base, CAPA, | |
614 | OMAP_HSMMC_READ(host->base, CAPA) | capa); | |
615 | ||
616 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
617 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
618 | ||
619 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
620 | while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP | |
621 | && time_before(jiffies, timeout)) | |
622 | ; | |
623 | ||
b417577d | 624 | omap_hsmmc_disable_irq(host); |
11dd62a7 DK |
625 | |
626 | /* Do not initialize card-specific things if the power is off */ | |
627 | if (host->power_mode == MMC_POWER_OFF) | |
628 | goto out; | |
629 | ||
3796fb8a | 630 | omap_hsmmc_set_bus_width(host); |
11dd62a7 | 631 | |
5934df2f | 632 | omap_hsmmc_set_clock(host); |
11dd62a7 | 633 | |
3796fb8a AS |
634 | omap_hsmmc_set_bus_mode(host); |
635 | ||
11dd62a7 DK |
636 | out: |
637 | host->context_loss = context_loss; | |
638 | ||
639 | dev_dbg(mmc_dev(host->mmc), "context is restored\n"); | |
640 | return 0; | |
641 | } | |
642 | ||
643 | /* | |
644 | * Save the MMC host context (store the number of power state changes so far). | |
645 | */ | |
70a3341a | 646 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
647 | { |
648 | struct omap_mmc_platform_data *pdata = host->pdata; | |
649 | int context_loss; | |
650 | ||
651 | if (pdata->get_context_loss_count) { | |
652 | context_loss = pdata->get_context_loss_count(host->dev); | |
653 | if (context_loss < 0) | |
654 | return; | |
655 | host->context_loss = context_loss; | |
656 | } | |
657 | } | |
658 | ||
659 | #else | |
660 | ||
70a3341a | 661 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
662 | { |
663 | return 0; | |
664 | } | |
665 | ||
70a3341a | 666 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
667 | { |
668 | } | |
669 | ||
670 | #endif | |
671 | ||
a45c6cb8 MC |
672 | /* |
673 | * Send init stream sequence to card | |
674 | * before sending IDLE command | |
675 | */ | |
70a3341a | 676 | static void send_init_stream(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
677 | { |
678 | int reg = 0; | |
679 | unsigned long timeout; | |
680 | ||
b62f6228 AH |
681 | if (host->protect_card) |
682 | return; | |
683 | ||
a45c6cb8 | 684 | disable_irq(host->irq); |
b417577d AH |
685 | |
686 | OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); | |
a45c6cb8 MC |
687 | OMAP_HSMMC_WRITE(host->base, CON, |
688 | OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM); | |
689 | OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD); | |
690 | ||
691 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
692 | while ((reg != CC) && time_before(jiffies, timeout)) | |
693 | reg = OMAP_HSMMC_READ(host->base, STAT) & CC; | |
694 | ||
695 | OMAP_HSMMC_WRITE(host->base, CON, | |
696 | OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM); | |
c653a6d4 AH |
697 | |
698 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
699 | OMAP_HSMMC_READ(host->base, STAT); | |
700 | ||
a45c6cb8 MC |
701 | enable_irq(host->irq); |
702 | } | |
703 | ||
704 | static inline | |
70a3341a | 705 | int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
706 | { |
707 | int r = 1; | |
708 | ||
191d1f1d DK |
709 | if (mmc_slot(host).get_cover_state) |
710 | r = mmc_slot(host).get_cover_state(host->dev, host->slot_id); | |
a45c6cb8 MC |
711 | return r; |
712 | } | |
713 | ||
714 | static ssize_t | |
70a3341a | 715 | omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
716 | char *buf) |
717 | { | |
718 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 719 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 720 | |
70a3341a DK |
721 | return sprintf(buf, "%s\n", |
722 | omap_hsmmc_cover_is_closed(host) ? "closed" : "open"); | |
a45c6cb8 MC |
723 | } |
724 | ||
70a3341a | 725 | static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL); |
a45c6cb8 MC |
726 | |
727 | static ssize_t | |
70a3341a | 728 | omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
729 | char *buf) |
730 | { | |
731 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 732 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 733 | |
191d1f1d | 734 | return sprintf(buf, "%s\n", mmc_slot(host).name); |
a45c6cb8 MC |
735 | } |
736 | ||
70a3341a | 737 | static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); |
a45c6cb8 MC |
738 | |
739 | /* | |
740 | * Configure the response type and send the cmd. | |
741 | */ | |
742 | static void | |
70a3341a | 743 | omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, |
a45c6cb8 MC |
744 | struct mmc_data *data) |
745 | { | |
746 | int cmdreg = 0, resptype = 0, cmdtype = 0; | |
747 | ||
748 | dev_dbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n", | |
749 | mmc_hostname(host->mmc), cmd->opcode, cmd->arg); | |
750 | host->cmd = cmd; | |
751 | ||
93caf8e6 | 752 | omap_hsmmc_enable_irq(host, cmd); |
a45c6cb8 | 753 | |
4a694dc9 | 754 | host->response_busy = 0; |
a45c6cb8 MC |
755 | if (cmd->flags & MMC_RSP_PRESENT) { |
756 | if (cmd->flags & MMC_RSP_136) | |
757 | resptype = 1; | |
4a694dc9 AH |
758 | else if (cmd->flags & MMC_RSP_BUSY) { |
759 | resptype = 3; | |
760 | host->response_busy = 1; | |
761 | } else | |
a45c6cb8 MC |
762 | resptype = 2; |
763 | } | |
764 | ||
765 | /* | |
766 | * Unlike OMAP1 controller, the cmdtype does not seem to be based on | |
767 | * ac, bc, adtc, bcr. Only commands ending an open ended transfer need | |
768 | * a val of 0x3, rest 0x0. | |
769 | */ | |
770 | if (cmd == host->mrq->stop) | |
771 | cmdtype = 0x3; | |
772 | ||
773 | cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22); | |
774 | ||
775 | if (data) { | |
776 | cmdreg |= DP_SELECT | MSBS | BCE; | |
777 | if (data->flags & MMC_DATA_READ) | |
778 | cmdreg |= DDIR; | |
779 | else | |
780 | cmdreg &= ~(DDIR); | |
781 | } | |
782 | ||
783 | if (host->use_dma) | |
784 | cmdreg |= DMA_EN; | |
785 | ||
b417577d | 786 | host->req_in_progress = 1; |
4dffd7a2 | 787 | |
a45c6cb8 MC |
788 | OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg); |
789 | OMAP_HSMMC_WRITE(host->base, CMD, cmdreg); | |
790 | } | |
791 | ||
0ccd76d4 | 792 | static int |
70a3341a | 793 | omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data) |
0ccd76d4 JY |
794 | { |
795 | if (data->flags & MMC_DATA_WRITE) | |
796 | return DMA_TO_DEVICE; | |
797 | else | |
798 | return DMA_FROM_DEVICE; | |
799 | } | |
800 | ||
c5c98927 RK |
801 | static struct dma_chan *omap_hsmmc_get_dma_chan(struct omap_hsmmc_host *host, |
802 | struct mmc_data *data) | |
803 | { | |
804 | return data->flags & MMC_DATA_WRITE ? host->tx_chan : host->rx_chan; | |
805 | } | |
806 | ||
b417577d AH |
807 | static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) |
808 | { | |
26b88520 | 809 | int dma_ch; |
31463b14 | 810 | unsigned long flags; |
b417577d | 811 | |
31463b14 | 812 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
813 | host->req_in_progress = 0; |
814 | dma_ch = host->dma_ch; | |
31463b14 | 815 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
816 | |
817 | omap_hsmmc_disable_irq(host); | |
818 | /* Do not complete the request if DMA is still in progress */ | |
26b88520 | 819 | if (mrq->data && host->use_dma && dma_ch != -1) |
b417577d AH |
820 | return; |
821 | host->mrq = NULL; | |
822 | mmc_request_done(host->mmc, mrq); | |
823 | } | |
824 | ||
a45c6cb8 MC |
825 | /* |
826 | * Notify the transfer complete to MMC core | |
827 | */ | |
828 | static void | |
70a3341a | 829 | omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) |
a45c6cb8 | 830 | { |
4a694dc9 AH |
831 | if (!data) { |
832 | struct mmc_request *mrq = host->mrq; | |
833 | ||
23050103 AH |
834 | /* TC before CC from CMD6 - don't know why, but it happens */ |
835 | if (host->cmd && host->cmd->opcode == 6 && | |
836 | host->response_busy) { | |
837 | host->response_busy = 0; | |
838 | return; | |
839 | } | |
840 | ||
b417577d | 841 | omap_hsmmc_request_done(host, mrq); |
4a694dc9 AH |
842 | return; |
843 | } | |
844 | ||
a45c6cb8 MC |
845 | host->data = NULL; |
846 | ||
a45c6cb8 MC |
847 | if (!data->error) |
848 | data->bytes_xfered += data->blocks * (data->blksz); | |
849 | else | |
850 | data->bytes_xfered = 0; | |
851 | ||
fe852273 | 852 | if (!data->stop) { |
b417577d | 853 | omap_hsmmc_request_done(host, data->mrq); |
fe852273 | 854 | return; |
a45c6cb8 | 855 | } |
fe852273 | 856 | omap_hsmmc_start_command(host, data->stop, NULL); |
a45c6cb8 MC |
857 | } |
858 | ||
859 | /* | |
860 | * Notify the core about command completion | |
861 | */ | |
862 | static void | |
70a3341a | 863 | omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) |
a45c6cb8 MC |
864 | { |
865 | host->cmd = NULL; | |
866 | ||
867 | if (cmd->flags & MMC_RSP_PRESENT) { | |
868 | if (cmd->flags & MMC_RSP_136) { | |
869 | /* response type 2 */ | |
870 | cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10); | |
871 | cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32); | |
872 | cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54); | |
873 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76); | |
874 | } else { | |
875 | /* response types 1, 1b, 3, 4, 5, 6 */ | |
876 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10); | |
877 | } | |
878 | } | |
b417577d AH |
879 | if ((host->data == NULL && !host->response_busy) || cmd->error) |
880 | omap_hsmmc_request_done(host, cmd->mrq); | |
a45c6cb8 MC |
881 | } |
882 | ||
883 | /* | |
884 | * DMA clean up for command errors | |
885 | */ | |
70a3341a | 886 | static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) |
a45c6cb8 | 887 | { |
26b88520 | 888 | int dma_ch; |
31463b14 | 889 | unsigned long flags; |
b417577d | 890 | |
82788ff5 | 891 | host->data->error = errno; |
a45c6cb8 | 892 | |
31463b14 | 893 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
894 | dma_ch = host->dma_ch; |
895 | host->dma_ch = -1; | |
31463b14 | 896 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d | 897 | |
26b88520 | 898 | if (host->use_dma && dma_ch != -1) { |
c5c98927 RK |
899 | struct dma_chan *chan = omap_hsmmc_get_dma_chan(host, host->data); |
900 | ||
901 | dmaengine_terminate_all(chan); | |
902 | dma_unmap_sg(chan->device->dev, | |
903 | host->data->sg, host->data->sg_len, | |
904 | omap_hsmmc_get_dma_dir(host, host->data)); | |
905 | ||
906 | host->data->host_cookie = 0; | |
907 | } | |
a45c6cb8 | 908 | host->data = NULL; |
a45c6cb8 MC |
909 | } |
910 | ||
911 | /* | |
912 | * Readable error output | |
913 | */ | |
914 | #ifdef CONFIG_MMC_DEBUG | |
699b958b | 915 | static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status) |
a45c6cb8 MC |
916 | { |
917 | /* --- means reserved bit without definition at documentation */ | |
70a3341a | 918 | static const char *omap_hsmmc_status_bits[] = { |
699b958b AH |
919 | "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" , |
920 | "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI", | |
921 | "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" , | |
922 | "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---" | |
a45c6cb8 MC |
923 | }; |
924 | char res[256]; | |
925 | char *buf = res; | |
926 | int len, i; | |
927 | ||
928 | len = sprintf(buf, "MMC IRQ 0x%x :", status); | |
929 | buf += len; | |
930 | ||
70a3341a | 931 | for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++) |
a45c6cb8 | 932 | if (status & (1 << i)) { |
70a3341a | 933 | len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]); |
a45c6cb8 MC |
934 | buf += len; |
935 | } | |
936 | ||
937 | dev_dbg(mmc_dev(host->mmc), "%s\n", res); | |
938 | } | |
699b958b AH |
939 | #else |
940 | static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, | |
941 | u32 status) | |
942 | { | |
943 | } | |
a45c6cb8 MC |
944 | #endif /* CONFIG_MMC_DEBUG */ |
945 | ||
3ebf74b1 JP |
946 | /* |
947 | * MMC controller internal state machines reset | |
948 | * | |
949 | * Used to reset command or data internal state machines, using respectively | |
950 | * SRC or SRD bit of SYSCTL register | |
951 | * Can be called from interrupt context | |
952 | */ | |
70a3341a DK |
953 | static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, |
954 | unsigned long bit) | |
3ebf74b1 JP |
955 | { |
956 | unsigned long i = 0; | |
957 | unsigned long limit = (loops_per_jiffy * | |
958 | msecs_to_jiffies(MMC_TIMEOUT_MS)); | |
959 | ||
960 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
961 | OMAP_HSMMC_READ(host->base, SYSCTL) | bit); | |
962 | ||
07ad64b6 MC |
963 | /* |
964 | * OMAP4 ES2 and greater has an updated reset logic. | |
965 | * Monitor a 0->1 transition first | |
966 | */ | |
967 | if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) { | |
b432b4b3 | 968 | while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit)) |
07ad64b6 MC |
969 | && (i++ < limit)) |
970 | cpu_relax(); | |
971 | } | |
972 | i = 0; | |
973 | ||
3ebf74b1 JP |
974 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) && |
975 | (i++ < limit)) | |
976 | cpu_relax(); | |
977 | ||
978 | if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit) | |
979 | dev_err(mmc_dev(host->mmc), | |
980 | "Timeout waiting on controller reset in %s\n", | |
981 | __func__); | |
982 | } | |
a45c6cb8 | 983 | |
b417577d | 984 | static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) |
a45c6cb8 | 985 | { |
a45c6cb8 | 986 | struct mmc_data *data; |
b417577d AH |
987 | int end_cmd = 0, end_trans = 0; |
988 | ||
989 | if (!host->req_in_progress) { | |
990 | do { | |
991 | OMAP_HSMMC_WRITE(host->base, STAT, status); | |
992 | /* Flush posted write */ | |
993 | status = OMAP_HSMMC_READ(host->base, STAT); | |
994 | } while (status & INT_EN_MASK); | |
995 | return; | |
a45c6cb8 MC |
996 | } |
997 | ||
998 | data = host->data; | |
a45c6cb8 MC |
999 | dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status); |
1000 | ||
1001 | if (status & ERR) { | |
699b958b | 1002 | omap_hsmmc_dbg_report_irq(host, status); |
a45c6cb8 MC |
1003 | if ((status & CMD_TIMEOUT) || |
1004 | (status & CMD_CRC)) { | |
1005 | if (host->cmd) { | |
1006 | if (status & CMD_TIMEOUT) { | |
70a3341a DK |
1007 | omap_hsmmc_reset_controller_fsm(host, |
1008 | SRC); | |
a45c6cb8 MC |
1009 | host->cmd->error = -ETIMEDOUT; |
1010 | } else { | |
1011 | host->cmd->error = -EILSEQ; | |
1012 | } | |
1013 | end_cmd = 1; | |
1014 | } | |
4a694dc9 AH |
1015 | if (host->data || host->response_busy) { |
1016 | if (host->data) | |
70a3341a DK |
1017 | omap_hsmmc_dma_cleanup(host, |
1018 | -ETIMEDOUT); | |
4a694dc9 | 1019 | host->response_busy = 0; |
70a3341a | 1020 | omap_hsmmc_reset_controller_fsm(host, SRD); |
c232f457 | 1021 | } |
a45c6cb8 MC |
1022 | } |
1023 | if ((status & DATA_TIMEOUT) || | |
1024 | (status & DATA_CRC)) { | |
4a694dc9 AH |
1025 | if (host->data || host->response_busy) { |
1026 | int err = (status & DATA_TIMEOUT) ? | |
1027 | -ETIMEDOUT : -EILSEQ; | |
1028 | ||
1029 | if (host->data) | |
70a3341a | 1030 | omap_hsmmc_dma_cleanup(host, err); |
a45c6cb8 | 1031 | else |
4a694dc9 AH |
1032 | host->mrq->cmd->error = err; |
1033 | host->response_busy = 0; | |
70a3341a | 1034 | omap_hsmmc_reset_controller_fsm(host, SRD); |
a45c6cb8 MC |
1035 | end_trans = 1; |
1036 | } | |
1037 | } | |
1038 | if (status & CARD_ERR) { | |
1039 | dev_dbg(mmc_dev(host->mmc), | |
1040 | "Ignoring card err CMD%d\n", host->cmd->opcode); | |
1041 | if (host->cmd) | |
1042 | end_cmd = 1; | |
1043 | if (host->data) | |
1044 | end_trans = 1; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | OMAP_HSMMC_WRITE(host->base, STAT, status); | |
1049 | ||
a8fe29d8 | 1050 | if (end_cmd || ((status & CC) && host->cmd)) |
70a3341a | 1051 | omap_hsmmc_cmd_done(host, host->cmd); |
0a40e647 | 1052 | if ((end_trans || (status & TC)) && host->mrq) |
70a3341a | 1053 | omap_hsmmc_xfer_done(host, data); |
b417577d | 1054 | } |
a45c6cb8 | 1055 | |
b417577d AH |
1056 | /* |
1057 | * MMC controller IRQ handler | |
1058 | */ | |
1059 | static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) | |
1060 | { | |
1061 | struct omap_hsmmc_host *host = dev_id; | |
1062 | int status; | |
1063 | ||
1064 | status = OMAP_HSMMC_READ(host->base, STAT); | |
1065 | do { | |
1066 | omap_hsmmc_do_irq(host, status); | |
1067 | /* Flush posted write */ | |
1068 | status = OMAP_HSMMC_READ(host->base, STAT); | |
1069 | } while (status & INT_EN_MASK); | |
4dffd7a2 | 1070 | |
a45c6cb8 MC |
1071 | return IRQ_HANDLED; |
1072 | } | |
1073 | ||
70a3341a | 1074 | static void set_sd_bus_power(struct omap_hsmmc_host *host) |
e13bb300 AH |
1075 | { |
1076 | unsigned long i; | |
1077 | ||
1078 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
1079 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
1080 | for (i = 0; i < loops_per_jiffy; i++) { | |
1081 | if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP) | |
1082 | break; | |
1083 | cpu_relax(); | |
1084 | } | |
1085 | } | |
1086 | ||
a45c6cb8 | 1087 | /* |
eb250826 DB |
1088 | * Switch MMC interface voltage ... only relevant for MMC1. |
1089 | * | |
1090 | * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver. | |
1091 | * The MMC2 transceiver controls are used instead of DAT4..DAT7. | |
1092 | * Some chips, like eMMC ones, use internal transceivers. | |
a45c6cb8 | 1093 | */ |
70a3341a | 1094 | static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) |
a45c6cb8 MC |
1095 | { |
1096 | u32 reg_val = 0; | |
1097 | int ret; | |
1098 | ||
1099 | /* Disable the clocks */ | |
fa4aa2d4 | 1100 | pm_runtime_put_sync(host->dev); |
cd03d9a8 | 1101 | if (host->dbclk) |
2bec0893 | 1102 | clk_disable(host->dbclk); |
a45c6cb8 MC |
1103 | |
1104 | /* Turn the power off */ | |
1105 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); | |
a45c6cb8 MC |
1106 | |
1107 | /* Turn the power ON with given VDD 1.8 or 3.0v */ | |
2bec0893 AH |
1108 | if (!ret) |
1109 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, | |
1110 | vdd); | |
fa4aa2d4 | 1111 | pm_runtime_get_sync(host->dev); |
cd03d9a8 | 1112 | if (host->dbclk) |
2bec0893 AH |
1113 | clk_enable(host->dbclk); |
1114 | ||
a45c6cb8 MC |
1115 | if (ret != 0) |
1116 | goto err; | |
1117 | ||
a45c6cb8 MC |
1118 | OMAP_HSMMC_WRITE(host->base, HCTL, |
1119 | OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR); | |
1120 | reg_val = OMAP_HSMMC_READ(host->base, HCTL); | |
eb250826 | 1121 | |
a45c6cb8 MC |
1122 | /* |
1123 | * If a MMC dual voltage card is detected, the set_ios fn calls | |
1124 | * this fn with VDD bit set for 1.8V. Upon card removal from the | |
70a3341a | 1125 | * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF. |
a45c6cb8 | 1126 | * |
eb250826 DB |
1127 | * Cope with a bit of slop in the range ... per data sheets: |
1128 | * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max, | |
1129 | * but recommended values are 1.71V to 1.89V | |
1130 | * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max, | |
1131 | * but recommended values are 2.7V to 3.3V | |
1132 | * | |
1133 | * Board setup code shouldn't permit anything very out-of-range. | |
1134 | * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the | |
1135 | * middle range) but VSIM can't power DAT4..DAT7 at more than 3V. | |
a45c6cb8 | 1136 | */ |
eb250826 | 1137 | if ((1 << vdd) <= MMC_VDD_23_24) |
a45c6cb8 | 1138 | reg_val |= SDVS18; |
eb250826 DB |
1139 | else |
1140 | reg_val |= SDVS30; | |
a45c6cb8 MC |
1141 | |
1142 | OMAP_HSMMC_WRITE(host->base, HCTL, reg_val); | |
e13bb300 | 1143 | set_sd_bus_power(host); |
a45c6cb8 MC |
1144 | |
1145 | return 0; | |
1146 | err: | |
1147 | dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n"); | |
1148 | return ret; | |
1149 | } | |
1150 | ||
b62f6228 AH |
1151 | /* Protect the card while the cover is open */ |
1152 | static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host) | |
1153 | { | |
1154 | if (!mmc_slot(host).get_cover_state) | |
1155 | return; | |
1156 | ||
1157 | host->reqs_blocked = 0; | |
1158 | if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) { | |
1159 | if (host->protect_card) { | |
2cecdf00 | 1160 | dev_info(host->dev, "%s: cover is closed, " |
b62f6228 AH |
1161 | "card is now accessible\n", |
1162 | mmc_hostname(host->mmc)); | |
1163 | host->protect_card = 0; | |
1164 | } | |
1165 | } else { | |
1166 | if (!host->protect_card) { | |
2cecdf00 | 1167 | dev_info(host->dev, "%s: cover is open, " |
b62f6228 AH |
1168 | "card is now inaccessible\n", |
1169 | mmc_hostname(host->mmc)); | |
1170 | host->protect_card = 1; | |
1171 | } | |
1172 | } | |
1173 | } | |
1174 | ||
a45c6cb8 | 1175 | /* |
7efab4f3 | 1176 | * irq handler to notify the core about card insertion/removal |
a45c6cb8 | 1177 | */ |
7efab4f3 | 1178 | static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id) |
a45c6cb8 | 1179 | { |
7efab4f3 | 1180 | struct omap_hsmmc_host *host = dev_id; |
249d0fa9 | 1181 | struct omap_mmc_slot_data *slot = &mmc_slot(host); |
a6b2240d AH |
1182 | int carddetect; |
1183 | ||
1184 | if (host->suspended) | |
7efab4f3 | 1185 | return IRQ_HANDLED; |
a6b2240d AH |
1186 | |
1187 | sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch"); | |
249d0fa9 | 1188 | |
191d1f1d | 1189 | if (slot->card_detect) |
db0fefc5 | 1190 | carddetect = slot->card_detect(host->dev, host->slot_id); |
b62f6228 AH |
1191 | else { |
1192 | omap_hsmmc_protect_card(host); | |
a6b2240d | 1193 | carddetect = -ENOSYS; |
b62f6228 | 1194 | } |
a45c6cb8 | 1195 | |
cdeebadd | 1196 | if (carddetect) |
a45c6cb8 | 1197 | mmc_detect_change(host->mmc, (HZ * 200) / 1000); |
cdeebadd | 1198 | else |
a45c6cb8 | 1199 | mmc_detect_change(host->mmc, (HZ * 50) / 1000); |
a45c6cb8 MC |
1200 | return IRQ_HANDLED; |
1201 | } | |
1202 | ||
c5c98927 RK |
1203 | static void omap_hsmmc_dma_callback(void *param) |
1204 | { | |
1205 | struct omap_hsmmc_host *host = param; | |
1206 | struct dma_chan *chan; | |
1207 | struct mmc_data *data; | |
1208 | int req_in_progress; | |
1209 | ||
1210 | spin_lock_irq(&host->irq_lock); | |
26b88520 | 1211 | if (host->dma_ch < 0) { |
c5c98927 RK |
1212 | spin_unlock_irq(&host->irq_lock); |
1213 | return; | |
1214 | } | |
1215 | ||
1216 | data = host->mrq->data; | |
1217 | chan = omap_hsmmc_get_dma_chan(host, data); | |
1218 | if (!data->host_cookie) | |
1219 | dma_unmap_sg(chan->device->dev, | |
1220 | data->sg, data->sg_len, | |
1221 | omap_hsmmc_get_dma_dir(host, data)); | |
1222 | ||
1223 | req_in_progress = host->req_in_progress; | |
26b88520 | 1224 | host->dma_ch = -1; |
c5c98927 RK |
1225 | spin_unlock_irq(&host->irq_lock); |
1226 | ||
1227 | /* If DMA has finished after TC, complete the request */ | |
1228 | if (!req_in_progress) { | |
1229 | struct mmc_request *mrq = host->mrq; | |
1230 | ||
1231 | host->mrq = NULL; | |
1232 | mmc_request_done(host->mmc, mrq); | |
1233 | } | |
1234 | } | |
1235 | ||
9782aff8 PF |
1236 | static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host, |
1237 | struct mmc_data *data, | |
c5c98927 | 1238 | struct omap_hsmmc_next *next, |
26b88520 | 1239 | struct dma_chan *chan) |
9782aff8 PF |
1240 | { |
1241 | int dma_len; | |
1242 | ||
1243 | if (!next && data->host_cookie && | |
1244 | data->host_cookie != host->next_data.cookie) { | |
2cecdf00 | 1245 | dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d" |
9782aff8 PF |
1246 | " host->next_data.cookie %d\n", |
1247 | __func__, data->host_cookie, host->next_data.cookie); | |
1248 | data->host_cookie = 0; | |
1249 | } | |
1250 | ||
1251 | /* Check if next job is already prepared */ | |
1252 | if (next || | |
1253 | (!next && data->host_cookie != host->next_data.cookie)) { | |
26b88520 | 1254 | dma_len = dma_map_sg(chan->device->dev, data->sg, data->sg_len, |
9782aff8 PF |
1255 | omap_hsmmc_get_dma_dir(host, data)); |
1256 | ||
1257 | } else { | |
1258 | dma_len = host->next_data.dma_len; | |
1259 | host->next_data.dma_len = 0; | |
1260 | } | |
1261 | ||
1262 | ||
1263 | if (dma_len == 0) | |
1264 | return -EINVAL; | |
1265 | ||
1266 | if (next) { | |
1267 | next->dma_len = dma_len; | |
1268 | data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie; | |
1269 | } else | |
1270 | host->dma_len = dma_len; | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
a45c6cb8 MC |
1275 | /* |
1276 | * Routine to configure and start DMA for the MMC card | |
1277 | */ | |
70a3341a DK |
1278 | static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host, |
1279 | struct mmc_request *req) | |
a45c6cb8 | 1280 | { |
26b88520 RK |
1281 | struct dma_slave_config cfg; |
1282 | struct dma_async_tx_descriptor *tx; | |
1283 | int ret = 0, i; | |
a45c6cb8 | 1284 | struct mmc_data *data = req->data; |
c5c98927 | 1285 | struct dma_chan *chan; |
a45c6cb8 | 1286 | |
0ccd76d4 | 1287 | /* Sanity check: all the SG entries must be aligned by block size. */ |
a3f406f8 | 1288 | for (i = 0; i < data->sg_len; i++) { |
0ccd76d4 JY |
1289 | struct scatterlist *sgl; |
1290 | ||
1291 | sgl = data->sg + i; | |
1292 | if (sgl->length % data->blksz) | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | if ((data->blksz % 4) != 0) | |
1296 | /* REVISIT: The MMC buffer increments only when MSB is written. | |
1297 | * Return error for blksz which is non multiple of four. | |
1298 | */ | |
1299 | return -EINVAL; | |
1300 | ||
26b88520 | 1301 | BUG_ON(host->dma_ch != -1); |
a45c6cb8 | 1302 | |
c5c98927 | 1303 | chan = omap_hsmmc_get_dma_chan(host, data); |
c5c98927 | 1304 | |
26b88520 RK |
1305 | cfg.src_addr = host->mapbase + OMAP_HSMMC_DATA; |
1306 | cfg.dst_addr = host->mapbase + OMAP_HSMMC_DATA; | |
1307 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
1308 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
1309 | cfg.src_maxburst = data->blksz / 4; | |
1310 | cfg.dst_maxburst = data->blksz / 4; | |
c5c98927 | 1311 | |
26b88520 RK |
1312 | ret = dmaengine_slave_config(chan, &cfg); |
1313 | if (ret) | |
1314 | return ret; | |
c5c98927 | 1315 | |
26b88520 RK |
1316 | ret = omap_hsmmc_pre_dma_transfer(host, data, NULL, chan); |
1317 | if (ret) | |
1318 | return ret; | |
1319 | ||
1320 | tx = dmaengine_prep_slave_sg(chan, data->sg, data->sg_len, | |
1321 | data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, | |
1322 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
1323 | if (!tx) { | |
1324 | dev_err(mmc_dev(host->mmc), "prep_slave_sg() failed\n"); | |
1325 | /* FIXME: cleanup */ | |
1326 | return -1; | |
1327 | } | |
a45c6cb8 | 1328 | |
26b88520 RK |
1329 | tx->callback = omap_hsmmc_dma_callback; |
1330 | tx->callback_param = host; | |
a45c6cb8 | 1331 | |
26b88520 RK |
1332 | /* Does not fail */ |
1333 | dmaengine_submit(tx); | |
c5c98927 | 1334 | |
26b88520 | 1335 | host->dma_ch = 1; |
c5c98927 | 1336 | |
26b88520 | 1337 | dma_async_issue_pending(chan); |
a45c6cb8 | 1338 | |
a45c6cb8 MC |
1339 | return 0; |
1340 | } | |
1341 | ||
70a3341a | 1342 | static void set_data_timeout(struct omap_hsmmc_host *host, |
e2bf08d6 AH |
1343 | unsigned int timeout_ns, |
1344 | unsigned int timeout_clks) | |
a45c6cb8 MC |
1345 | { |
1346 | unsigned int timeout, cycle_ns; | |
1347 | uint32_t reg, clkd, dto = 0; | |
1348 | ||
1349 | reg = OMAP_HSMMC_READ(host->base, SYSCTL); | |
1350 | clkd = (reg & CLKD_MASK) >> CLKD_SHIFT; | |
1351 | if (clkd == 0) | |
1352 | clkd = 1; | |
1353 | ||
1354 | cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd); | |
e2bf08d6 AH |
1355 | timeout = timeout_ns / cycle_ns; |
1356 | timeout += timeout_clks; | |
a45c6cb8 MC |
1357 | if (timeout) { |
1358 | while ((timeout & 0x80000000) == 0) { | |
1359 | dto += 1; | |
1360 | timeout <<= 1; | |
1361 | } | |
1362 | dto = 31 - dto; | |
1363 | timeout <<= 1; | |
1364 | if (timeout && dto) | |
1365 | dto += 1; | |
1366 | if (dto >= 13) | |
1367 | dto -= 13; | |
1368 | else | |
1369 | dto = 0; | |
1370 | if (dto > 14) | |
1371 | dto = 14; | |
1372 | } | |
1373 | ||
1374 | reg &= ~DTO_MASK; | |
1375 | reg |= dto << DTO_SHIFT; | |
1376 | OMAP_HSMMC_WRITE(host->base, SYSCTL, reg); | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * Configure block length for MMC/SD cards and initiate the transfer. | |
1381 | */ | |
1382 | static int | |
70a3341a | 1383 | omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) |
a45c6cb8 MC |
1384 | { |
1385 | int ret; | |
1386 | host->data = req->data; | |
1387 | ||
1388 | if (req->data == NULL) { | |
a45c6cb8 | 1389 | OMAP_HSMMC_WRITE(host->base, BLK, 0); |
e2bf08d6 AH |
1390 | /* |
1391 | * Set an arbitrary 100ms data timeout for commands with | |
1392 | * busy signal. | |
1393 | */ | |
1394 | if (req->cmd->flags & MMC_RSP_BUSY) | |
1395 | set_data_timeout(host, 100000000U, 0); | |
a45c6cb8 MC |
1396 | return 0; |
1397 | } | |
1398 | ||
1399 | OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz) | |
1400 | | (req->data->blocks << 16)); | |
e2bf08d6 | 1401 | set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks); |
a45c6cb8 | 1402 | |
a45c6cb8 | 1403 | if (host->use_dma) { |
70a3341a | 1404 | ret = omap_hsmmc_start_dma_transfer(host, req); |
a45c6cb8 MC |
1405 | if (ret != 0) { |
1406 | dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n"); | |
1407 | return ret; | |
1408 | } | |
1409 | } | |
1410 | return 0; | |
1411 | } | |
1412 | ||
9782aff8 PF |
1413 | static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, |
1414 | int err) | |
1415 | { | |
1416 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1417 | struct mmc_data *data = mrq->data; | |
1418 | ||
26b88520 | 1419 | if (host->use_dma && data->host_cookie) { |
c5c98927 | 1420 | struct dma_chan *c = omap_hsmmc_get_dma_chan(host, data); |
c5c98927 | 1421 | |
26b88520 RK |
1422 | dma_unmap_sg(c->device->dev, data->sg, data->sg_len, |
1423 | omap_hsmmc_get_dma_dir(host, data)); | |
9782aff8 PF |
1424 | data->host_cookie = 0; |
1425 | } | |
1426 | } | |
1427 | ||
1428 | static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
1429 | bool is_first_req) | |
1430 | { | |
1431 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1432 | ||
1433 | if (mrq->data->host_cookie) { | |
1434 | mrq->data->host_cookie = 0; | |
1435 | return ; | |
1436 | } | |
1437 | ||
c5c98927 RK |
1438 | if (host->use_dma) { |
1439 | struct dma_chan *c = omap_hsmmc_get_dma_chan(host, mrq->data); | |
c5c98927 | 1440 | |
9782aff8 | 1441 | if (omap_hsmmc_pre_dma_transfer(host, mrq->data, |
26b88520 | 1442 | &host->next_data, c)) |
9782aff8 | 1443 | mrq->data->host_cookie = 0; |
c5c98927 | 1444 | } |
9782aff8 PF |
1445 | } |
1446 | ||
a45c6cb8 MC |
1447 | /* |
1448 | * Request function. for read/write operation | |
1449 | */ | |
70a3341a | 1450 | static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) |
a45c6cb8 | 1451 | { |
70a3341a | 1452 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3f406f8 | 1453 | int err; |
a45c6cb8 | 1454 | |
b417577d | 1455 | BUG_ON(host->req_in_progress); |
26b88520 | 1456 | BUG_ON(host->dma_ch != -1); |
b417577d AH |
1457 | if (host->protect_card) { |
1458 | if (host->reqs_blocked < 3) { | |
1459 | /* | |
1460 | * Ensure the controller is left in a consistent | |
1461 | * state by resetting the command and data state | |
1462 | * machines. | |
1463 | */ | |
1464 | omap_hsmmc_reset_controller_fsm(host, SRD); | |
1465 | omap_hsmmc_reset_controller_fsm(host, SRC); | |
1466 | host->reqs_blocked += 1; | |
1467 | } | |
1468 | req->cmd->error = -EBADF; | |
1469 | if (req->data) | |
1470 | req->data->error = -EBADF; | |
1471 | req->cmd->retries = 0; | |
1472 | mmc_request_done(mmc, req); | |
1473 | return; | |
1474 | } else if (host->reqs_blocked) | |
1475 | host->reqs_blocked = 0; | |
a45c6cb8 MC |
1476 | WARN_ON(host->mrq != NULL); |
1477 | host->mrq = req; | |
70a3341a | 1478 | err = omap_hsmmc_prepare_data(host, req); |
a3f406f8 JL |
1479 | if (err) { |
1480 | req->cmd->error = err; | |
1481 | if (req->data) | |
1482 | req->data->error = err; | |
1483 | host->mrq = NULL; | |
1484 | mmc_request_done(mmc, req); | |
1485 | return; | |
1486 | } | |
1487 | ||
70a3341a | 1488 | omap_hsmmc_start_command(host, req->cmd, req->data); |
a45c6cb8 MC |
1489 | } |
1490 | ||
a45c6cb8 | 1491 | /* Routine to configure clock values. Exposed API to core */ |
70a3341a | 1492 | static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
a45c6cb8 | 1493 | { |
70a3341a | 1494 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3621465 | 1495 | int do_send_init_stream = 0; |
a45c6cb8 | 1496 | |
fa4aa2d4 | 1497 | pm_runtime_get_sync(host->dev); |
5e2ea617 | 1498 | |
a3621465 AH |
1499 | if (ios->power_mode != host->power_mode) { |
1500 | switch (ios->power_mode) { | |
1501 | case MMC_POWER_OFF: | |
1502 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1503 | 0, 0); | |
623821f7 | 1504 | host->vdd = 0; |
a3621465 AH |
1505 | break; |
1506 | case MMC_POWER_UP: | |
1507 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1508 | 1, ios->vdd); | |
623821f7 | 1509 | host->vdd = ios->vdd; |
a3621465 AH |
1510 | break; |
1511 | case MMC_POWER_ON: | |
1512 | do_send_init_stream = 1; | |
1513 | break; | |
1514 | } | |
1515 | host->power_mode = ios->power_mode; | |
a45c6cb8 MC |
1516 | } |
1517 | ||
dd498eff DK |
1518 | /* FIXME: set registers based only on changes to ios */ |
1519 | ||
3796fb8a | 1520 | omap_hsmmc_set_bus_width(host); |
a45c6cb8 | 1521 | |
4621d5f8 | 1522 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
eb250826 DB |
1523 | /* Only MMC1 can interface at 3V without some flavor |
1524 | * of external transceiver; but they all handle 1.8V. | |
1525 | */ | |
a45c6cb8 | 1526 | if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) && |
1f84b71b RN |
1527 | (ios->vdd == DUAL_VOLT_OCR_BIT) && |
1528 | /* | |
1529 | * With pbias cell programming missing, this | |
1530 | * can't be allowed when booting with device | |
1531 | * tree. | |
1532 | */ | |
4d048f91 | 1533 | !host->dev->of_node) { |
a45c6cb8 MC |
1534 | /* |
1535 | * The mmc_select_voltage fn of the core does | |
1536 | * not seem to set the power_mode to | |
1537 | * MMC_POWER_UP upon recalculating the voltage. | |
1538 | * vdd 1.8v. | |
1539 | */ | |
70a3341a DK |
1540 | if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0) |
1541 | dev_dbg(mmc_dev(host->mmc), | |
a45c6cb8 MC |
1542 | "Switch operation failed\n"); |
1543 | } | |
1544 | } | |
1545 | ||
5934df2f | 1546 | omap_hsmmc_set_clock(host); |
a45c6cb8 | 1547 | |
a3621465 | 1548 | if (do_send_init_stream) |
a45c6cb8 MC |
1549 | send_init_stream(host); |
1550 | ||
3796fb8a | 1551 | omap_hsmmc_set_bus_mode(host); |
5e2ea617 | 1552 | |
fa4aa2d4 | 1553 | pm_runtime_put_autosuspend(host->dev); |
a45c6cb8 MC |
1554 | } |
1555 | ||
1556 | static int omap_hsmmc_get_cd(struct mmc_host *mmc) | |
1557 | { | |
70a3341a | 1558 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1559 | |
191d1f1d | 1560 | if (!mmc_slot(host).card_detect) |
a45c6cb8 | 1561 | return -ENOSYS; |
db0fefc5 | 1562 | return mmc_slot(host).card_detect(host->dev, host->slot_id); |
a45c6cb8 MC |
1563 | } |
1564 | ||
1565 | static int omap_hsmmc_get_ro(struct mmc_host *mmc) | |
1566 | { | |
70a3341a | 1567 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1568 | |
191d1f1d | 1569 | if (!mmc_slot(host).get_ro) |
a45c6cb8 | 1570 | return -ENOSYS; |
191d1f1d | 1571 | return mmc_slot(host).get_ro(host->dev, 0); |
a45c6cb8 MC |
1572 | } |
1573 | ||
4816858c GI |
1574 | static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) |
1575 | { | |
1576 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1577 | ||
1578 | if (mmc_slot(host).init_card) | |
1579 | mmc_slot(host).init_card(card); | |
1580 | } | |
1581 | ||
70a3341a | 1582 | static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) |
1b331e69 KK |
1583 | { |
1584 | u32 hctl, capa, value; | |
1585 | ||
1586 | /* Only MMC1 supports 3.0V */ | |
4621d5f8 | 1587 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
1b331e69 KK |
1588 | hctl = SDVS30; |
1589 | capa = VS30 | VS18; | |
1590 | } else { | |
1591 | hctl = SDVS18; | |
1592 | capa = VS18; | |
1593 | } | |
1594 | ||
1595 | value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK; | |
1596 | OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl); | |
1597 | ||
1598 | value = OMAP_HSMMC_READ(host->base, CAPA); | |
1599 | OMAP_HSMMC_WRITE(host->base, CAPA, value | capa); | |
1600 | ||
1601 | /* Set the controller to AUTO IDLE mode */ | |
1602 | value = OMAP_HSMMC_READ(host->base, SYSCONFIG); | |
1603 | OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE); | |
1604 | ||
1605 | /* Set SD bus power bit */ | |
e13bb300 | 1606 | set_sd_bus_power(host); |
1b331e69 KK |
1607 | } |
1608 | ||
70a3341a | 1609 | static int omap_hsmmc_enable_fclk(struct mmc_host *mmc) |
dd498eff | 1610 | { |
70a3341a | 1611 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1612 | |
fa4aa2d4 B |
1613 | pm_runtime_get_sync(host->dev); |
1614 | ||
dd498eff DK |
1615 | return 0; |
1616 | } | |
1617 | ||
907d2e7c | 1618 | static int omap_hsmmc_disable_fclk(struct mmc_host *mmc) |
dd498eff | 1619 | { |
70a3341a | 1620 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1621 | |
fa4aa2d4 B |
1622 | pm_runtime_mark_last_busy(host->dev); |
1623 | pm_runtime_put_autosuspend(host->dev); | |
1624 | ||
dd498eff DK |
1625 | return 0; |
1626 | } | |
1627 | ||
70a3341a DK |
1628 | static const struct mmc_host_ops omap_hsmmc_ops = { |
1629 | .enable = omap_hsmmc_enable_fclk, | |
1630 | .disable = omap_hsmmc_disable_fclk, | |
9782aff8 PF |
1631 | .post_req = omap_hsmmc_post_req, |
1632 | .pre_req = omap_hsmmc_pre_req, | |
70a3341a DK |
1633 | .request = omap_hsmmc_request, |
1634 | .set_ios = omap_hsmmc_set_ios, | |
dd498eff DK |
1635 | .get_cd = omap_hsmmc_get_cd, |
1636 | .get_ro = omap_hsmmc_get_ro, | |
4816858c | 1637 | .init_card = omap_hsmmc_init_card, |
dd498eff DK |
1638 | /* NYET -- enable_sdio_irq */ |
1639 | }; | |
1640 | ||
d900f712 DK |
1641 | #ifdef CONFIG_DEBUG_FS |
1642 | ||
70a3341a | 1643 | static int omap_hsmmc_regs_show(struct seq_file *s, void *data) |
d900f712 DK |
1644 | { |
1645 | struct mmc_host *mmc = s->private; | |
70a3341a | 1646 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
11dd62a7 DK |
1647 | int context_loss = 0; |
1648 | ||
70a3341a DK |
1649 | if (host->pdata->get_context_loss_count) |
1650 | context_loss = host->pdata->get_context_loss_count(host->dev); | |
d900f712 | 1651 | |
907d2e7c AH |
1652 | seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n", |
1653 | mmc->index, host->context_loss, context_loss); | |
5e2ea617 | 1654 | |
7a8c2cef | 1655 | if (host->suspended) { |
dd498eff DK |
1656 | seq_printf(s, "host suspended, can't read registers\n"); |
1657 | return 0; | |
1658 | } | |
1659 | ||
fa4aa2d4 | 1660 | pm_runtime_get_sync(host->dev); |
d900f712 DK |
1661 | |
1662 | seq_printf(s, "SYSCONFIG:\t0x%08x\n", | |
1663 | OMAP_HSMMC_READ(host->base, SYSCONFIG)); | |
1664 | seq_printf(s, "CON:\t\t0x%08x\n", | |
1665 | OMAP_HSMMC_READ(host->base, CON)); | |
1666 | seq_printf(s, "HCTL:\t\t0x%08x\n", | |
1667 | OMAP_HSMMC_READ(host->base, HCTL)); | |
1668 | seq_printf(s, "SYSCTL:\t\t0x%08x\n", | |
1669 | OMAP_HSMMC_READ(host->base, SYSCTL)); | |
1670 | seq_printf(s, "IE:\t\t0x%08x\n", | |
1671 | OMAP_HSMMC_READ(host->base, IE)); | |
1672 | seq_printf(s, "ISE:\t\t0x%08x\n", | |
1673 | OMAP_HSMMC_READ(host->base, ISE)); | |
1674 | seq_printf(s, "CAPA:\t\t0x%08x\n", | |
1675 | OMAP_HSMMC_READ(host->base, CAPA)); | |
5e2ea617 | 1676 | |
fa4aa2d4 B |
1677 | pm_runtime_mark_last_busy(host->dev); |
1678 | pm_runtime_put_autosuspend(host->dev); | |
dd498eff | 1679 | |
d900f712 DK |
1680 | return 0; |
1681 | } | |
1682 | ||
70a3341a | 1683 | static int omap_hsmmc_regs_open(struct inode *inode, struct file *file) |
d900f712 | 1684 | { |
70a3341a | 1685 | return single_open(file, omap_hsmmc_regs_show, inode->i_private); |
d900f712 DK |
1686 | } |
1687 | ||
1688 | static const struct file_operations mmc_regs_fops = { | |
70a3341a | 1689 | .open = omap_hsmmc_regs_open, |
d900f712 DK |
1690 | .read = seq_read, |
1691 | .llseek = seq_lseek, | |
1692 | .release = single_release, | |
1693 | }; | |
1694 | ||
70a3341a | 1695 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1696 | { |
1697 | if (mmc->debugfs_root) | |
1698 | debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root, | |
1699 | mmc, &mmc_regs_fops); | |
1700 | } | |
1701 | ||
1702 | #else | |
1703 | ||
70a3341a | 1704 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1705 | { |
1706 | } | |
1707 | ||
1708 | #endif | |
1709 | ||
46856a68 RN |
1710 | #ifdef CONFIG_OF |
1711 | static u16 omap4_reg_offset = 0x100; | |
1712 | ||
1713 | static const struct of_device_id omap_mmc_of_match[] = { | |
1714 | { | |
1715 | .compatible = "ti,omap2-hsmmc", | |
1716 | }, | |
1717 | { | |
1718 | .compatible = "ti,omap3-hsmmc", | |
1719 | }, | |
1720 | { | |
1721 | .compatible = "ti,omap4-hsmmc", | |
1722 | .data = &omap4_reg_offset, | |
1723 | }, | |
1724 | {}, | |
b6d085f6 | 1725 | }; |
46856a68 RN |
1726 | MODULE_DEVICE_TABLE(of, omap_mmc_of_match); |
1727 | ||
1728 | static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) | |
1729 | { | |
1730 | struct omap_mmc_platform_data *pdata; | |
1731 | struct device_node *np = dev->of_node; | |
1732 | u32 bus_width; | |
1733 | ||
1734 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
1735 | if (!pdata) | |
1736 | return NULL; /* out of memory */ | |
1737 | ||
1738 | if (of_find_property(np, "ti,dual-volt", NULL)) | |
1739 | pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT; | |
1740 | ||
1741 | /* This driver only supports 1 slot */ | |
1742 | pdata->nr_slots = 1; | |
1743 | pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0); | |
1744 | pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0); | |
1745 | ||
1746 | if (of_find_property(np, "ti,non-removable", NULL)) { | |
1747 | pdata->slots[0].nonremovable = true; | |
1748 | pdata->slots[0].no_regulator_off_init = true; | |
1749 | } | |
7f217794 | 1750 | of_property_read_u32(np, "bus-width", &bus_width); |
46856a68 RN |
1751 | if (bus_width == 4) |
1752 | pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA; | |
1753 | else if (bus_width == 8) | |
1754 | pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA; | |
1755 | ||
1756 | if (of_find_property(np, "ti,needs-special-reset", NULL)) | |
1757 | pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET; | |
1758 | ||
1759 | return pdata; | |
1760 | } | |
1761 | #else | |
1762 | static inline struct omap_mmc_platform_data | |
1763 | *of_get_hsmmc_pdata(struct device *dev) | |
1764 | { | |
1765 | return NULL; | |
1766 | } | |
1767 | #endif | |
1768 | ||
26b88520 RK |
1769 | extern bool omap_dma_filter_fn(struct dma_chan *chan, void *param); |
1770 | ||
efa25fd3 | 1771 | static int __devinit omap_hsmmc_probe(struct platform_device *pdev) |
a45c6cb8 MC |
1772 | { |
1773 | struct omap_mmc_platform_data *pdata = pdev->dev.platform_data; | |
1774 | struct mmc_host *mmc; | |
70a3341a | 1775 | struct omap_hsmmc_host *host = NULL; |
a45c6cb8 | 1776 | struct resource *res; |
db0fefc5 | 1777 | int ret, irq; |
46856a68 | 1778 | const struct of_device_id *match; |
26b88520 RK |
1779 | dma_cap_mask_t mask; |
1780 | unsigned tx_req, rx_req; | |
46856a68 RN |
1781 | |
1782 | match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); | |
1783 | if (match) { | |
1784 | pdata = of_get_hsmmc_pdata(&pdev->dev); | |
1785 | if (match->data) { | |
1786 | u16 *offsetp = match->data; | |
1787 | pdata->reg_offset = *offsetp; | |
1788 | } | |
1789 | } | |
a45c6cb8 MC |
1790 | |
1791 | if (pdata == NULL) { | |
1792 | dev_err(&pdev->dev, "Platform Data is missing\n"); | |
1793 | return -ENXIO; | |
1794 | } | |
1795 | ||
1796 | if (pdata->nr_slots == 0) { | |
1797 | dev_err(&pdev->dev, "No Slots\n"); | |
1798 | return -ENXIO; | |
1799 | } | |
1800 | ||
1801 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1802 | irq = platform_get_irq(pdev, 0); | |
1803 | if (res == NULL || irq < 0) | |
1804 | return -ENXIO; | |
1805 | ||
984b203a | 1806 | res = request_mem_region(res->start, resource_size(res), pdev->name); |
a45c6cb8 MC |
1807 | if (res == NULL) |
1808 | return -EBUSY; | |
1809 | ||
db0fefc5 AH |
1810 | ret = omap_hsmmc_gpio_init(pdata); |
1811 | if (ret) | |
1812 | goto err; | |
1813 | ||
70a3341a | 1814 | mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); |
a45c6cb8 MC |
1815 | if (!mmc) { |
1816 | ret = -ENOMEM; | |
db0fefc5 | 1817 | goto err_alloc; |
a45c6cb8 MC |
1818 | } |
1819 | ||
1820 | host = mmc_priv(mmc); | |
1821 | host->mmc = mmc; | |
1822 | host->pdata = pdata; | |
1823 | host->dev = &pdev->dev; | |
1824 | host->use_dma = 1; | |
a45c6cb8 MC |
1825 | host->dma_ch = -1; |
1826 | host->irq = irq; | |
a45c6cb8 | 1827 | host->slot_id = 0; |
fc307df8 | 1828 | host->mapbase = res->start + pdata->reg_offset; |
a45c6cb8 | 1829 | host->base = ioremap(host->mapbase, SZ_4K); |
6da20c89 | 1830 | host->power_mode = MMC_POWER_OFF; |
9782aff8 | 1831 | host->next_data.cookie = 1; |
a45c6cb8 MC |
1832 | |
1833 | platform_set_drvdata(pdev, host); | |
a45c6cb8 | 1834 | |
7a8c2cef | 1835 | mmc->ops = &omap_hsmmc_ops; |
dd498eff | 1836 | |
e0eb2424 AH |
1837 | /* |
1838 | * If regulator_disable can only put vcc_aux to sleep then there is | |
1839 | * no off state. | |
1840 | */ | |
1841 | if (mmc_slot(host).vcc_aux_disable_is_sleep) | |
1842 | mmc_slot(host).no_off = 1; | |
1843 | ||
d418ed87 DM |
1844 | mmc->f_min = OMAP_MMC_MIN_CLOCK; |
1845 | ||
1846 | if (pdata->max_freq > 0) | |
1847 | mmc->f_max = pdata->max_freq; | |
1848 | else | |
1849 | mmc->f_max = OMAP_MMC_MAX_CLOCK; | |
a45c6cb8 | 1850 | |
4dffd7a2 | 1851 | spin_lock_init(&host->irq_lock); |
a45c6cb8 | 1852 | |
6f7607cc | 1853 | host->fclk = clk_get(&pdev->dev, "fck"); |
a45c6cb8 MC |
1854 | if (IS_ERR(host->fclk)) { |
1855 | ret = PTR_ERR(host->fclk); | |
1856 | host->fclk = NULL; | |
a45c6cb8 MC |
1857 | goto err1; |
1858 | } | |
1859 | ||
9b68256c PW |
1860 | if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) { |
1861 | dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n"); | |
1862 | mmc->caps2 |= MMC_CAP2_NO_MULTI_READ; | |
1863 | } | |
dd498eff | 1864 | |
fa4aa2d4 B |
1865 | pm_runtime_enable(host->dev); |
1866 | pm_runtime_get_sync(host->dev); | |
1867 | pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY); | |
1868 | pm_runtime_use_autosuspend(host->dev); | |
a45c6cb8 | 1869 | |
92a3aebf B |
1870 | omap_hsmmc_context_save(host); |
1871 | ||
cd03d9a8 RN |
1872 | host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); |
1873 | /* | |
1874 | * MMC can still work without debounce clock. | |
1875 | */ | |
1876 | if (IS_ERR(host->dbclk)) { | |
1877 | dev_warn(mmc_dev(host->mmc), "Failed to get debounce clk\n"); | |
1878 | host->dbclk = NULL; | |
1879 | } else if (clk_enable(host->dbclk) != 0) { | |
1880 | dev_warn(mmc_dev(host->mmc), "Failed to enable debounce clk\n"); | |
1881 | clk_put(host->dbclk); | |
1882 | host->dbclk = NULL; | |
2bec0893 | 1883 | } |
a45c6cb8 | 1884 | |
0ccd76d4 JY |
1885 | /* Since we do only SG emulation, we can have as many segs |
1886 | * as we want. */ | |
a36274e0 | 1887 | mmc->max_segs = 1024; |
0ccd76d4 | 1888 | |
a45c6cb8 MC |
1889 | mmc->max_blk_size = 512; /* Block Length at max can be 1024 */ |
1890 | mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */ | |
1891 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
1892 | mmc->max_seg_size = mmc->max_req_size; | |
1893 | ||
13189e78 | 1894 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
93caf8e6 | 1895 | MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE; |
a45c6cb8 | 1896 | |
3a63833e SG |
1897 | mmc->caps |= mmc_slot(host).caps; |
1898 | if (mmc->caps & MMC_CAP_8_BIT_DATA) | |
a45c6cb8 MC |
1899 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
1900 | ||
191d1f1d | 1901 | if (mmc_slot(host).nonremovable) |
23d99bb9 AH |
1902 | mmc->caps |= MMC_CAP_NONREMOVABLE; |
1903 | ||
6fdc75de EP |
1904 | mmc->pm_caps = mmc_slot(host).pm_caps; |
1905 | ||
70a3341a | 1906 | omap_hsmmc_conf_bus_power(host); |
a45c6cb8 | 1907 | |
b7bf773b B |
1908 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); |
1909 | if (!res) { | |
1910 | dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); | |
1911 | goto err_irq; | |
1912 | } | |
26b88520 | 1913 | tx_req = res->start; |
b7bf773b B |
1914 | |
1915 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); | |
1916 | if (!res) { | |
1917 | dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); | |
f3e2f1dd GI |
1918 | goto err_irq; |
1919 | } | |
26b88520 | 1920 | rx_req = res->start; |
a45c6cb8 | 1921 | |
26b88520 RK |
1922 | dma_cap_zero(mask); |
1923 | dma_cap_set(DMA_SLAVE, mask); | |
1924 | ||
1925 | host->rx_chan = dma_request_channel(mask, omap_dma_filter_fn, &rx_req); | |
1926 | if (!host->rx_chan) { | |
1927 | dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req); | |
1928 | goto err_irq; | |
1929 | } | |
1930 | ||
1931 | host->tx_chan = dma_request_channel(mask, omap_dma_filter_fn, &tx_req); | |
1932 | if (!host->tx_chan) { | |
1933 | dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req); | |
1934 | goto err_irq; | |
c5c98927 RK |
1935 | } |
1936 | ||
a45c6cb8 | 1937 | /* Request IRQ for MMC operations */ |
d9618e9f | 1938 | ret = request_irq(host->irq, omap_hsmmc_irq, 0, |
a45c6cb8 MC |
1939 | mmc_hostname(mmc), host); |
1940 | if (ret) { | |
1941 | dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n"); | |
1942 | goto err_irq; | |
1943 | } | |
1944 | ||
1945 | if (pdata->init != NULL) { | |
1946 | if (pdata->init(&pdev->dev) != 0) { | |
70a3341a DK |
1947 | dev_dbg(mmc_dev(host->mmc), |
1948 | "Unable to configure MMC IRQs\n"); | |
a45c6cb8 MC |
1949 | goto err_irq_cd_init; |
1950 | } | |
1951 | } | |
db0fefc5 | 1952 | |
b702b106 | 1953 | if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) { |
db0fefc5 AH |
1954 | ret = omap_hsmmc_reg_get(host); |
1955 | if (ret) | |
1956 | goto err_reg; | |
1957 | host->use_reg = 1; | |
1958 | } | |
1959 | ||
b583f26d | 1960 | mmc->ocr_avail = mmc_slot(host).ocr_mask; |
a45c6cb8 MC |
1961 | |
1962 | /* Request IRQ for card detect */ | |
e1a55f5e | 1963 | if ((mmc_slot(host).card_detect_irq)) { |
7efab4f3 N |
1964 | ret = request_threaded_irq(mmc_slot(host).card_detect_irq, |
1965 | NULL, | |
1966 | omap_hsmmc_detect, | |
db35f83e | 1967 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
7efab4f3 | 1968 | mmc_hostname(mmc), host); |
a45c6cb8 MC |
1969 | if (ret) { |
1970 | dev_dbg(mmc_dev(host->mmc), | |
1971 | "Unable to grab MMC CD IRQ\n"); | |
1972 | goto err_irq_cd; | |
1973 | } | |
72f2e2c7 | 1974 | pdata->suspend = omap_hsmmc_suspend_cdirq; |
1975 | pdata->resume = omap_hsmmc_resume_cdirq; | |
a45c6cb8 MC |
1976 | } |
1977 | ||
b417577d | 1978 | omap_hsmmc_disable_irq(host); |
a45c6cb8 | 1979 | |
b62f6228 AH |
1980 | omap_hsmmc_protect_card(host); |
1981 | ||
a45c6cb8 MC |
1982 | mmc_add_host(mmc); |
1983 | ||
191d1f1d | 1984 | if (mmc_slot(host).name != NULL) { |
a45c6cb8 MC |
1985 | ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); |
1986 | if (ret < 0) | |
1987 | goto err_slot_name; | |
1988 | } | |
191d1f1d | 1989 | if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) { |
a45c6cb8 MC |
1990 | ret = device_create_file(&mmc->class_dev, |
1991 | &dev_attr_cover_switch); | |
1992 | if (ret < 0) | |
db0fefc5 | 1993 | goto err_slot_name; |
a45c6cb8 MC |
1994 | } |
1995 | ||
70a3341a | 1996 | omap_hsmmc_debugfs(mmc); |
fa4aa2d4 B |
1997 | pm_runtime_mark_last_busy(host->dev); |
1998 | pm_runtime_put_autosuspend(host->dev); | |
d900f712 | 1999 | |
a45c6cb8 MC |
2000 | return 0; |
2001 | ||
a45c6cb8 MC |
2002 | err_slot_name: |
2003 | mmc_remove_host(mmc); | |
a45c6cb8 | 2004 | free_irq(mmc_slot(host).card_detect_irq, host); |
db0fefc5 AH |
2005 | err_irq_cd: |
2006 | if (host->use_reg) | |
2007 | omap_hsmmc_reg_put(host); | |
2008 | err_reg: | |
2009 | if (host->pdata->cleanup) | |
2010 | host->pdata->cleanup(&pdev->dev); | |
a45c6cb8 MC |
2011 | err_irq_cd_init: |
2012 | free_irq(host->irq, host); | |
2013 | err_irq: | |
c5c98927 RK |
2014 | if (host->tx_chan) |
2015 | dma_release_channel(host->tx_chan); | |
2016 | if (host->rx_chan) | |
2017 | dma_release_channel(host->rx_chan); | |
d59d77ed | 2018 | pm_runtime_put_sync(host->dev); |
37f6190d | 2019 | pm_runtime_disable(host->dev); |
a45c6cb8 | 2020 | clk_put(host->fclk); |
cd03d9a8 | 2021 | if (host->dbclk) { |
a45c6cb8 MC |
2022 | clk_disable(host->dbclk); |
2023 | clk_put(host->dbclk); | |
2024 | } | |
a45c6cb8 MC |
2025 | err1: |
2026 | iounmap(host->base); | |
db0fefc5 AH |
2027 | platform_set_drvdata(pdev, NULL); |
2028 | mmc_free_host(mmc); | |
2029 | err_alloc: | |
2030 | omap_hsmmc_gpio_free(pdata); | |
a45c6cb8 | 2031 | err: |
48b332f9 RK |
2032 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2033 | if (res) | |
2034 | release_mem_region(res->start, resource_size(res)); | |
a45c6cb8 MC |
2035 | return ret; |
2036 | } | |
2037 | ||
efa25fd3 | 2038 | static int __devexit omap_hsmmc_remove(struct platform_device *pdev) |
a45c6cb8 | 2039 | { |
70a3341a | 2040 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
a45c6cb8 MC |
2041 | struct resource *res; |
2042 | ||
927ce944 FB |
2043 | pm_runtime_get_sync(host->dev); |
2044 | mmc_remove_host(host->mmc); | |
2045 | if (host->use_reg) | |
2046 | omap_hsmmc_reg_put(host); | |
2047 | if (host->pdata->cleanup) | |
2048 | host->pdata->cleanup(&pdev->dev); | |
2049 | free_irq(host->irq, host); | |
2050 | if (mmc_slot(host).card_detect_irq) | |
2051 | free_irq(mmc_slot(host).card_detect_irq, host); | |
a45c6cb8 | 2052 | |
c5c98927 RK |
2053 | if (host->tx_chan) |
2054 | dma_release_channel(host->tx_chan); | |
2055 | if (host->rx_chan) | |
2056 | dma_release_channel(host->rx_chan); | |
2057 | ||
927ce944 FB |
2058 | pm_runtime_put_sync(host->dev); |
2059 | pm_runtime_disable(host->dev); | |
2060 | clk_put(host->fclk); | |
cd03d9a8 | 2061 | if (host->dbclk) { |
927ce944 FB |
2062 | clk_disable(host->dbclk); |
2063 | clk_put(host->dbclk); | |
a45c6cb8 MC |
2064 | } |
2065 | ||
927ce944 FB |
2066 | mmc_free_host(host->mmc); |
2067 | iounmap(host->base); | |
2068 | omap_hsmmc_gpio_free(pdev->dev.platform_data); | |
2069 | ||
a45c6cb8 MC |
2070 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2071 | if (res) | |
984b203a | 2072 | release_mem_region(res->start, resource_size(res)); |
a45c6cb8 MC |
2073 | platform_set_drvdata(pdev, NULL); |
2074 | ||
2075 | return 0; | |
2076 | } | |
2077 | ||
2078 | #ifdef CONFIG_PM | |
a791daa1 | 2079 | static int omap_hsmmc_suspend(struct device *dev) |
a45c6cb8 MC |
2080 | { |
2081 | int ret = 0; | |
927ce944 | 2082 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
a45c6cb8 | 2083 | |
927ce944 | 2084 | if (!host) |
a45c6cb8 MC |
2085 | return 0; |
2086 | ||
927ce944 FB |
2087 | if (host && host->suspended) |
2088 | return 0; | |
fa4aa2d4 | 2089 | |
927ce944 FB |
2090 | pm_runtime_get_sync(host->dev); |
2091 | host->suspended = 1; | |
2092 | if (host->pdata->suspend) { | |
2093 | ret = host->pdata->suspend(dev, host->slot_id); | |
31f9d463 | 2094 | if (ret) { |
927ce944 FB |
2095 | dev_dbg(dev, "Unable to handle MMC board" |
2096 | " level suspend\n"); | |
a6b2240d | 2097 | host->suspended = 0; |
927ce944 | 2098 | return ret; |
a6b2240d | 2099 | } |
927ce944 FB |
2100 | } |
2101 | ret = mmc_suspend_host(host->mmc); | |
31f9d463 | 2102 | |
927ce944 FB |
2103 | if (ret) { |
2104 | host->suspended = 0; | |
2105 | if (host->pdata->resume) { | |
2106 | ret = host->pdata->resume(dev, host->slot_id); | |
2107 | if (ret) | |
2108 | dev_dbg(dev, "Unmask interrupt failed\n"); | |
31f9d463 | 2109 | } |
927ce944 FB |
2110 | goto err; |
2111 | } | |
31f9d463 | 2112 | |
927ce944 FB |
2113 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) { |
2114 | omap_hsmmc_disable_irq(host); | |
2115 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
2116 | OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); | |
a45c6cb8 | 2117 | } |
927ce944 | 2118 | |
cd03d9a8 | 2119 | if (host->dbclk) |
927ce944 | 2120 | clk_disable(host->dbclk); |
31f9d463 EP |
2121 | err: |
2122 | pm_runtime_put_sync(host->dev); | |
a45c6cb8 MC |
2123 | return ret; |
2124 | } | |
2125 | ||
2126 | /* Routine to resume the MMC device */ | |
a791daa1 | 2127 | static int omap_hsmmc_resume(struct device *dev) |
a45c6cb8 MC |
2128 | { |
2129 | int ret = 0; | |
927ce944 FB |
2130 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
2131 | ||
2132 | if (!host) | |
2133 | return 0; | |
a45c6cb8 MC |
2134 | |
2135 | if (host && !host->suspended) | |
2136 | return 0; | |
2137 | ||
927ce944 | 2138 | pm_runtime_get_sync(host->dev); |
11dd62a7 | 2139 | |
cd03d9a8 | 2140 | if (host->dbclk) |
927ce944 | 2141 | clk_enable(host->dbclk); |
2bec0893 | 2142 | |
927ce944 FB |
2143 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) |
2144 | omap_hsmmc_conf_bus_power(host); | |
1b331e69 | 2145 | |
927ce944 FB |
2146 | if (host->pdata->resume) { |
2147 | ret = host->pdata->resume(dev, host->slot_id); | |
2148 | if (ret) | |
2149 | dev_dbg(dev, "Unmask interrupt failed\n"); | |
2150 | } | |
a45c6cb8 | 2151 | |
927ce944 | 2152 | omap_hsmmc_protect_card(host); |
b62f6228 | 2153 | |
927ce944 FB |
2154 | /* Notify the core to resume the host */ |
2155 | ret = mmc_resume_host(host->mmc); | |
2156 | if (ret == 0) | |
2157 | host->suspended = 0; | |
fa4aa2d4 | 2158 | |
927ce944 FB |
2159 | pm_runtime_mark_last_busy(host->dev); |
2160 | pm_runtime_put_autosuspend(host->dev); | |
a45c6cb8 MC |
2161 | |
2162 | return ret; | |
2163 | ||
a45c6cb8 MC |
2164 | } |
2165 | ||
2166 | #else | |
70a3341a DK |
2167 | #define omap_hsmmc_suspend NULL |
2168 | #define omap_hsmmc_resume NULL | |
a45c6cb8 MC |
2169 | #endif |
2170 | ||
fa4aa2d4 B |
2171 | static int omap_hsmmc_runtime_suspend(struct device *dev) |
2172 | { | |
2173 | struct omap_hsmmc_host *host; | |
2174 | ||
2175 | host = platform_get_drvdata(to_platform_device(dev)); | |
2176 | omap_hsmmc_context_save(host); | |
927ce944 | 2177 | dev_dbg(dev, "disabled\n"); |
fa4aa2d4 B |
2178 | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | static int omap_hsmmc_runtime_resume(struct device *dev) | |
2183 | { | |
2184 | struct omap_hsmmc_host *host; | |
2185 | ||
2186 | host = platform_get_drvdata(to_platform_device(dev)); | |
2187 | omap_hsmmc_context_restore(host); | |
927ce944 | 2188 | dev_dbg(dev, "enabled\n"); |
fa4aa2d4 B |
2189 | |
2190 | return 0; | |
2191 | } | |
2192 | ||
a791daa1 | 2193 | static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { |
70a3341a DK |
2194 | .suspend = omap_hsmmc_suspend, |
2195 | .resume = omap_hsmmc_resume, | |
fa4aa2d4 B |
2196 | .runtime_suspend = omap_hsmmc_runtime_suspend, |
2197 | .runtime_resume = omap_hsmmc_runtime_resume, | |
a791daa1 KH |
2198 | }; |
2199 | ||
2200 | static struct platform_driver omap_hsmmc_driver = { | |
efa25fd3 FB |
2201 | .probe = omap_hsmmc_probe, |
2202 | .remove = __devexit_p(omap_hsmmc_remove), | |
a45c6cb8 MC |
2203 | .driver = { |
2204 | .name = DRIVER_NAME, | |
2205 | .owner = THIS_MODULE, | |
a791daa1 | 2206 | .pm = &omap_hsmmc_dev_pm_ops, |
46856a68 | 2207 | .of_match_table = of_match_ptr(omap_mmc_of_match), |
a45c6cb8 MC |
2208 | }, |
2209 | }; | |
2210 | ||
b796450b | 2211 | module_platform_driver(omap_hsmmc_driver); |
a45c6cb8 MC |
2212 | MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver"); |
2213 | MODULE_LICENSE("GPL"); | |
2214 | MODULE_ALIAS("platform:" DRIVER_NAME); | |
2215 | MODULE_AUTHOR("Texas Instruments Inc"); |