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> | |
3451c067 | 33 | #include <linux/omap-dma.h> |
a45c6cb8 | 34 | #include <linux/mmc/host.h> |
13189e78 | 35 | #include <linux/mmc/core.h> |
93caf8e6 | 36 | #include <linux/mmc/mmc.h> |
a45c6cb8 | 37 | #include <linux/io.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 */ | |
11dd62a7 | 47 | #define OMAP_HSMMC_SYSSTATUS 0x0014 |
a45c6cb8 MC |
48 | #define OMAP_HSMMC_CON 0x002C |
49 | #define OMAP_HSMMC_BLK 0x0104 | |
50 | #define OMAP_HSMMC_ARG 0x0108 | |
51 | #define OMAP_HSMMC_CMD 0x010C | |
52 | #define OMAP_HSMMC_RSP10 0x0110 | |
53 | #define OMAP_HSMMC_RSP32 0x0114 | |
54 | #define OMAP_HSMMC_RSP54 0x0118 | |
55 | #define OMAP_HSMMC_RSP76 0x011C | |
56 | #define OMAP_HSMMC_DATA 0x0120 | |
57 | #define OMAP_HSMMC_HCTL 0x0128 | |
58 | #define OMAP_HSMMC_SYSCTL 0x012C | |
59 | #define OMAP_HSMMC_STAT 0x0130 | |
60 | #define OMAP_HSMMC_IE 0x0134 | |
61 | #define OMAP_HSMMC_ISE 0x0138 | |
62 | #define OMAP_HSMMC_CAPA 0x0140 | |
63 | ||
64 | #define VS18 (1 << 26) | |
65 | #define VS30 (1 << 25) | |
66 | #define SDVS18 (0x5 << 9) | |
67 | #define SDVS30 (0x6 << 9) | |
eb250826 | 68 | #define SDVS33 (0x7 << 9) |
1b331e69 | 69 | #define SDVS_MASK 0x00000E00 |
a45c6cb8 MC |
70 | #define SDVSCLR 0xFFFFF1FF |
71 | #define SDVSDET 0x00000400 | |
72 | #define AUTOIDLE 0x1 | |
73 | #define SDBP (1 << 8) | |
74 | #define DTO 0xe | |
75 | #define ICE 0x1 | |
76 | #define ICS 0x2 | |
77 | #define CEN (1 << 2) | |
78 | #define CLKD_MASK 0x0000FFC0 | |
79 | #define CLKD_SHIFT 6 | |
80 | #define DTO_MASK 0x000F0000 | |
81 | #define DTO_SHIFT 16 | |
82 | #define INT_EN_MASK 0x307F0033 | |
ccdfe3a6 AG |
83 | #define BWR_ENABLE (1 << 4) |
84 | #define BRR_ENABLE (1 << 5) | |
93caf8e6 | 85 | #define DTO_ENABLE (1 << 20) |
a45c6cb8 MC |
86 | #define INIT_STREAM (1 << 1) |
87 | #define DP_SELECT (1 << 21) | |
88 | #define DDIR (1 << 4) | |
89 | #define DMA_EN 0x1 | |
90 | #define MSBS (1 << 5) | |
91 | #define BCE (1 << 1) | |
92 | #define FOUR_BIT (1 << 1) | |
03b5d924 | 93 | #define DDR (1 << 19) |
73153010 | 94 | #define DW8 (1 << 5) |
a45c6cb8 MC |
95 | #define CC 0x1 |
96 | #define TC 0x02 | |
97 | #define OD 0x1 | |
98 | #define ERR (1 << 15) | |
99 | #define CMD_TIMEOUT (1 << 16) | |
100 | #define DATA_TIMEOUT (1 << 20) | |
101 | #define CMD_CRC (1 << 17) | |
102 | #define DATA_CRC (1 << 21) | |
103 | #define CARD_ERR (1 << 28) | |
104 | #define STAT_CLEAR 0xFFFFFFFF | |
105 | #define INIT_STREAM_CMD 0x00000000 | |
106 | #define DUAL_VOLT_OCR_BIT 7 | |
107 | #define SRC (1 << 25) | |
108 | #define SRD (1 << 26) | |
11dd62a7 DK |
109 | #define SOFTRESET (1 << 1) |
110 | #define RESETDONE (1 << 0) | |
a45c6cb8 | 111 | |
fa4aa2d4 | 112 | #define MMC_AUTOSUSPEND_DELAY 100 |
a45c6cb8 | 113 | #define MMC_TIMEOUT_MS 20 |
6b206efe AS |
114 | #define OMAP_MMC_MIN_CLOCK 400000 |
115 | #define OMAP_MMC_MAX_CLOCK 52000000 | |
0005ae73 | 116 | #define DRIVER_NAME "omap_hsmmc" |
a45c6cb8 MC |
117 | |
118 | /* | |
119 | * One controller can have multiple slots, like on some omap boards using | |
120 | * omap.c controller driver. Luckily this is not currently done on any known | |
121 | * omap_hsmmc.c device. | |
122 | */ | |
123 | #define mmc_slot(host) (host->pdata->slots[host->slot_id]) | |
124 | ||
125 | /* | |
126 | * MMC Host controller read/write API's | |
127 | */ | |
128 | #define OMAP_HSMMC_READ(base, reg) \ | |
129 | __raw_readl((base) + OMAP_HSMMC_##reg) | |
130 | ||
131 | #define OMAP_HSMMC_WRITE(base, reg, val) \ | |
132 | __raw_writel((val), (base) + OMAP_HSMMC_##reg) | |
133 | ||
9782aff8 PF |
134 | struct omap_hsmmc_next { |
135 | unsigned int dma_len; | |
136 | s32 cookie; | |
137 | }; | |
138 | ||
70a3341a | 139 | struct omap_hsmmc_host { |
a45c6cb8 MC |
140 | struct device *dev; |
141 | struct mmc_host *mmc; | |
142 | struct mmc_request *mrq; | |
143 | struct mmc_command *cmd; | |
144 | struct mmc_data *data; | |
145 | struct clk *fclk; | |
a45c6cb8 | 146 | struct clk *dbclk; |
db0fefc5 AH |
147 | /* |
148 | * vcc == configured supply | |
149 | * vcc_aux == optional | |
150 | * - MMC1, supply for DAT4..DAT7 | |
151 | * - MMC2/MMC2, external level shifter voltage supply, for | |
152 | * chip (SDIO, eMMC, etc) or transceiver (MMC2 only) | |
153 | */ | |
154 | struct regulator *vcc; | |
155 | struct regulator *vcc_aux; | |
a45c6cb8 MC |
156 | void __iomem *base; |
157 | resource_size_t mapbase; | |
4dffd7a2 | 158 | spinlock_t irq_lock; /* Prevent races with irq handler */ |
a45c6cb8 | 159 | unsigned int dma_len; |
0ccd76d4 | 160 | unsigned int dma_sg_idx; |
a45c6cb8 | 161 | unsigned char bus_mode; |
a3621465 | 162 | unsigned char power_mode; |
a45c6cb8 MC |
163 | int suspended; |
164 | int irq; | |
a45c6cb8 | 165 | int use_dma, dma_ch; |
c5c98927 RK |
166 | struct dma_chan *tx_chan; |
167 | struct dma_chan *rx_chan; | |
a45c6cb8 | 168 | int slot_id; |
4a694dc9 | 169 | int response_busy; |
11dd62a7 | 170 | int context_loss; |
b62f6228 AH |
171 | int protect_card; |
172 | int reqs_blocked; | |
db0fefc5 | 173 | int use_reg; |
b417577d | 174 | int req_in_progress; |
9782aff8 | 175 | struct omap_hsmmc_next next_data; |
11dd62a7 | 176 | |
a45c6cb8 MC |
177 | struct omap_mmc_platform_data *pdata; |
178 | }; | |
179 | ||
db0fefc5 AH |
180 | static int omap_hsmmc_card_detect(struct device *dev, int slot) |
181 | { | |
182 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
183 | ||
184 | /* NOTE: assumes card detect signal is active-low */ | |
185 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
186 | } | |
187 | ||
188 | static int omap_hsmmc_get_wp(struct device *dev, int slot) | |
189 | { | |
190 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
191 | ||
192 | /* NOTE: assumes write protect signal is active-high */ | |
193 | return gpio_get_value_cansleep(mmc->slots[0].gpio_wp); | |
194 | } | |
195 | ||
196 | static int omap_hsmmc_get_cover_state(struct device *dev, int slot) | |
197 | { | |
198 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
199 | ||
200 | /* NOTE: assumes card detect signal is active-low */ | |
201 | return !gpio_get_value_cansleep(mmc->slots[0].switch_pin); | |
202 | } | |
203 | ||
204 | #ifdef CONFIG_PM | |
205 | ||
206 | static int omap_hsmmc_suspend_cdirq(struct device *dev, int slot) | |
207 | { | |
208 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
209 | ||
210 | disable_irq(mmc->slots[0].card_detect_irq); | |
211 | return 0; | |
212 | } | |
213 | ||
214 | static int omap_hsmmc_resume_cdirq(struct device *dev, int slot) | |
215 | { | |
216 | struct omap_mmc_platform_data *mmc = dev->platform_data; | |
217 | ||
218 | enable_irq(mmc->slots[0].card_detect_irq); | |
219 | return 0; | |
220 | } | |
221 | ||
222 | #else | |
223 | ||
224 | #define omap_hsmmc_suspend_cdirq NULL | |
225 | #define omap_hsmmc_resume_cdirq NULL | |
226 | ||
227 | #endif | |
228 | ||
b702b106 AH |
229 | #ifdef CONFIG_REGULATOR |
230 | ||
69b07ece | 231 | static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, |
db0fefc5 AH |
232 | int vdd) |
233 | { | |
234 | struct omap_hsmmc_host *host = | |
235 | platform_get_drvdata(to_platform_device(dev)); | |
236 | int ret = 0; | |
237 | ||
238 | /* | |
239 | * If we don't see a Vcc regulator, assume it's a fixed | |
240 | * voltage always-on regulator. | |
241 | */ | |
242 | if (!host->vcc) | |
243 | return 0; | |
1f84b71b RN |
244 | /* |
245 | * With DT, never turn OFF the regulator. This is because | |
246 | * the pbias cell programming support is still missing when | |
247 | * booting with Device tree | |
248 | */ | |
4d048f91 | 249 | if (dev->of_node && !vdd) |
1f84b71b | 250 | return 0; |
db0fefc5 AH |
251 | |
252 | if (mmc_slot(host).before_set_reg) | |
253 | mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); | |
254 | ||
255 | /* | |
256 | * Assume Vcc regulator is used only to power the card ... OMAP | |
257 | * VDDS is used to power the pins, optionally with a transceiver to | |
258 | * support cards using voltages other than VDDS (1.8V nominal). When a | |
259 | * transceiver is used, DAT3..7 are muxed as transceiver control pins. | |
260 | * | |
261 | * In some cases this regulator won't support enable/disable; | |
262 | * e.g. it's a fixed rail for a WLAN chip. | |
263 | * | |
264 | * In other cases vcc_aux switches interface power. Example, for | |
265 | * eMMC cards it represents VccQ. Sometimes transceivers or SDIO | |
266 | * chips/cards need an interface voltage rail too. | |
267 | */ | |
268 | if (power_on) { | |
99fc5131 | 269 | ret = mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); |
db0fefc5 AH |
270 | /* Enable interface voltage rail, if needed */ |
271 | if (ret == 0 && host->vcc_aux) { | |
272 | ret = regulator_enable(host->vcc_aux); | |
273 | if (ret < 0) | |
99fc5131 LW |
274 | ret = mmc_regulator_set_ocr(host->mmc, |
275 | host->vcc, 0); | |
db0fefc5 AH |
276 | } |
277 | } else { | |
99fc5131 | 278 | /* Shut down the rail */ |
6da20c89 AH |
279 | if (host->vcc_aux) |
280 | ret = regulator_disable(host->vcc_aux); | |
99fc5131 LW |
281 | if (!ret) { |
282 | /* Then proceed to shut down the local regulator */ | |
283 | ret = mmc_regulator_set_ocr(host->mmc, | |
284 | host->vcc, 0); | |
285 | } | |
db0fefc5 AH |
286 | } |
287 | ||
288 | if (mmc_slot(host).after_set_reg) | |
289 | mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); | |
290 | ||
291 | return ret; | |
292 | } | |
293 | ||
db0fefc5 AH |
294 | static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) |
295 | { | |
296 | struct regulator *reg; | |
64be9782 | 297 | int ocr_value = 0; |
db0fefc5 | 298 | |
db0fefc5 AH |
299 | reg = regulator_get(host->dev, "vmmc"); |
300 | if (IS_ERR(reg)) { | |
301 | dev_dbg(host->dev, "vmmc regulator missing\n"); | |
1fdc90fb | 302 | return PTR_ERR(reg); |
db0fefc5 | 303 | } else { |
1fdc90fb | 304 | mmc_slot(host).set_power = omap_hsmmc_set_power; |
db0fefc5 | 305 | host->vcc = reg; |
64be9782 | 306 | ocr_value = mmc_regulator_get_ocrmask(reg); |
307 | if (!mmc_slot(host).ocr_mask) { | |
308 | mmc_slot(host).ocr_mask = ocr_value; | |
309 | } else { | |
310 | if (!(mmc_slot(host).ocr_mask & ocr_value)) { | |
2cecdf00 | 311 | dev_err(host->dev, "ocrmask %x is not supported\n", |
e3f1adb6 | 312 | mmc_slot(host).ocr_mask); |
64be9782 | 313 | mmc_slot(host).ocr_mask = 0; |
314 | return -EINVAL; | |
315 | } | |
316 | } | |
db0fefc5 AH |
317 | |
318 | /* Allow an aux regulator */ | |
319 | reg = regulator_get(host->dev, "vmmc_aux"); | |
320 | host->vcc_aux = IS_ERR(reg) ? NULL : reg; | |
321 | ||
b1c1df7a B |
322 | /* For eMMC do not power off when not in sleep state */ |
323 | if (mmc_slot(host).no_regulator_off_init) | |
324 | return 0; | |
db0fefc5 AH |
325 | /* |
326 | * UGLY HACK: workaround regulator framework bugs. | |
327 | * When the bootloader leaves a supply active, it's | |
328 | * initialized with zero usecount ... and we can't | |
329 | * disable it without first enabling it. Until the | |
330 | * framework is fixed, we need a workaround like this | |
331 | * (which is safe for MMC, but not in general). | |
332 | */ | |
e840ce13 AH |
333 | if (regulator_is_enabled(host->vcc) > 0 || |
334 | (host->vcc_aux && regulator_is_enabled(host->vcc_aux))) { | |
335 | int vdd = ffs(mmc_slot(host).ocr_mask) - 1; | |
336 | ||
337 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
338 | 1, vdd); | |
339 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
340 | 0, 0); | |
db0fefc5 AH |
341 | } |
342 | } | |
343 | ||
344 | return 0; | |
db0fefc5 AH |
345 | } |
346 | ||
347 | static void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
348 | { | |
349 | regulator_put(host->vcc); | |
350 | regulator_put(host->vcc_aux); | |
351 | mmc_slot(host).set_power = NULL; | |
db0fefc5 AH |
352 | } |
353 | ||
b702b106 AH |
354 | static inline int omap_hsmmc_have_reg(void) |
355 | { | |
356 | return 1; | |
357 | } | |
358 | ||
359 | #else | |
360 | ||
361 | static inline int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) | |
362 | { | |
363 | return -EINVAL; | |
364 | } | |
365 | ||
366 | static inline void omap_hsmmc_reg_put(struct omap_hsmmc_host *host) | |
367 | { | |
368 | } | |
369 | ||
370 | static inline int omap_hsmmc_have_reg(void) | |
371 | { | |
372 | return 0; | |
373 | } | |
374 | ||
375 | #endif | |
376 | ||
377 | static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) | |
378 | { | |
379 | int ret; | |
380 | ||
381 | if (gpio_is_valid(pdata->slots[0].switch_pin)) { | |
b702b106 AH |
382 | if (pdata->slots[0].cover) |
383 | pdata->slots[0].get_cover_state = | |
384 | omap_hsmmc_get_cover_state; | |
385 | else | |
386 | pdata->slots[0].card_detect = omap_hsmmc_card_detect; | |
387 | pdata->slots[0].card_detect_irq = | |
388 | gpio_to_irq(pdata->slots[0].switch_pin); | |
389 | ret = gpio_request(pdata->slots[0].switch_pin, "mmc_cd"); | |
390 | if (ret) | |
391 | return ret; | |
392 | ret = gpio_direction_input(pdata->slots[0].switch_pin); | |
393 | if (ret) | |
394 | goto err_free_sp; | |
395 | } else | |
396 | pdata->slots[0].switch_pin = -EINVAL; | |
397 | ||
398 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) { | |
399 | pdata->slots[0].get_ro = omap_hsmmc_get_wp; | |
400 | ret = gpio_request(pdata->slots[0].gpio_wp, "mmc_wp"); | |
401 | if (ret) | |
402 | goto err_free_cd; | |
403 | ret = gpio_direction_input(pdata->slots[0].gpio_wp); | |
404 | if (ret) | |
405 | goto err_free_wp; | |
406 | } else | |
407 | pdata->slots[0].gpio_wp = -EINVAL; | |
408 | ||
409 | return 0; | |
410 | ||
411 | err_free_wp: | |
412 | gpio_free(pdata->slots[0].gpio_wp); | |
413 | err_free_cd: | |
414 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
415 | err_free_sp: | |
416 | gpio_free(pdata->slots[0].switch_pin); | |
417 | return ret; | |
418 | } | |
419 | ||
420 | static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) | |
421 | { | |
422 | if (gpio_is_valid(pdata->slots[0].gpio_wp)) | |
423 | gpio_free(pdata->slots[0].gpio_wp); | |
424 | if (gpio_is_valid(pdata->slots[0].switch_pin)) | |
425 | gpio_free(pdata->slots[0].switch_pin); | |
426 | } | |
427 | ||
e0c7f99b AS |
428 | /* |
429 | * Start clock to the card | |
430 | */ | |
431 | static void omap_hsmmc_start_clock(struct omap_hsmmc_host *host) | |
432 | { | |
433 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
434 | OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); | |
435 | } | |
436 | ||
a45c6cb8 MC |
437 | /* |
438 | * Stop clock to the card | |
439 | */ | |
70a3341a | 440 | static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
441 | { |
442 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
443 | OMAP_HSMMC_READ(host->base, SYSCTL) & ~CEN); | |
444 | if ((OMAP_HSMMC_READ(host->base, SYSCTL) & CEN) != 0x0) | |
445 | dev_dbg(mmc_dev(host->mmc), "MMC Clock is not stoped\n"); | |
446 | } | |
447 | ||
93caf8e6 AH |
448 | static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, |
449 | struct mmc_command *cmd) | |
b417577d AH |
450 | { |
451 | unsigned int irq_mask; | |
452 | ||
453 | if (host->use_dma) | |
454 | irq_mask = INT_EN_MASK & ~(BRR_ENABLE | BWR_ENABLE); | |
455 | else | |
456 | irq_mask = INT_EN_MASK; | |
457 | ||
93caf8e6 AH |
458 | /* Disable timeout for erases */ |
459 | if (cmd->opcode == MMC_ERASE) | |
460 | irq_mask &= ~DTO_ENABLE; | |
461 | ||
b417577d AH |
462 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); |
463 | OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); | |
464 | OMAP_HSMMC_WRITE(host->base, IE, irq_mask); | |
465 | } | |
466 | ||
467 | static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) | |
468 | { | |
469 | OMAP_HSMMC_WRITE(host->base, ISE, 0); | |
470 | OMAP_HSMMC_WRITE(host->base, IE, 0); | |
471 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
472 | } | |
473 | ||
ac330f44 | 474 | /* Calculate divisor for the given clock frequency */ |
d83b6e03 | 475 | static u16 calc_divisor(struct omap_hsmmc_host *host, struct mmc_ios *ios) |
ac330f44 AS |
476 | { |
477 | u16 dsor = 0; | |
478 | ||
479 | if (ios->clock) { | |
d83b6e03 | 480 | dsor = DIV_ROUND_UP(clk_get_rate(host->fclk), ios->clock); |
ac330f44 AS |
481 | if (dsor > 250) |
482 | dsor = 250; | |
483 | } | |
484 | ||
485 | return dsor; | |
486 | } | |
487 | ||
5934df2f AS |
488 | static void omap_hsmmc_set_clock(struct omap_hsmmc_host *host) |
489 | { | |
490 | struct mmc_ios *ios = &host->mmc->ios; | |
491 | unsigned long regval; | |
492 | unsigned long timeout; | |
493 | ||
8986d31b | 494 | dev_vdbg(mmc_dev(host->mmc), "Set clock to %uHz\n", ios->clock); |
5934df2f AS |
495 | |
496 | omap_hsmmc_stop_clock(host); | |
497 | ||
498 | regval = OMAP_HSMMC_READ(host->base, SYSCTL); | |
499 | regval = regval & ~(CLKD_MASK | DTO_MASK); | |
d83b6e03 | 500 | regval = regval | (calc_divisor(host, ios) << 6) | (DTO << 16); |
5934df2f AS |
501 | OMAP_HSMMC_WRITE(host->base, SYSCTL, regval); |
502 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
503 | OMAP_HSMMC_READ(host->base, SYSCTL) | ICE); | |
504 | ||
505 | /* Wait till the ICS bit is set */ | |
506 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
507 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & ICS) != ICS | |
508 | && time_before(jiffies, timeout)) | |
509 | cpu_relax(); | |
510 | ||
511 | omap_hsmmc_start_clock(host); | |
512 | } | |
513 | ||
3796fb8a AS |
514 | static void omap_hsmmc_set_bus_width(struct omap_hsmmc_host *host) |
515 | { | |
516 | struct mmc_ios *ios = &host->mmc->ios; | |
517 | u32 con; | |
518 | ||
519 | con = OMAP_HSMMC_READ(host->base, CON); | |
03b5d924 B |
520 | if (ios->timing == MMC_TIMING_UHS_DDR50) |
521 | con |= DDR; /* configure in DDR mode */ | |
522 | else | |
523 | con &= ~DDR; | |
3796fb8a AS |
524 | switch (ios->bus_width) { |
525 | case MMC_BUS_WIDTH_8: | |
526 | OMAP_HSMMC_WRITE(host->base, CON, con | DW8); | |
527 | break; | |
528 | case MMC_BUS_WIDTH_4: | |
529 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
530 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
531 | OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT); | |
532 | break; | |
533 | case MMC_BUS_WIDTH_1: | |
534 | OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8); | |
535 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
536 | OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT); | |
537 | break; | |
538 | } | |
539 | } | |
540 | ||
541 | static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host) | |
542 | { | |
543 | struct mmc_ios *ios = &host->mmc->ios; | |
544 | u32 con; | |
545 | ||
546 | con = OMAP_HSMMC_READ(host->base, CON); | |
547 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
548 | OMAP_HSMMC_WRITE(host->base, CON, con | OD); | |
549 | else | |
550 | OMAP_HSMMC_WRITE(host->base, CON, con & ~OD); | |
551 | } | |
552 | ||
11dd62a7 DK |
553 | #ifdef CONFIG_PM |
554 | ||
555 | /* | |
556 | * Restore the MMC host context, if it was lost as result of a | |
557 | * power state change. | |
558 | */ | |
70a3341a | 559 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
560 | { |
561 | struct mmc_ios *ios = &host->mmc->ios; | |
562 | struct omap_mmc_platform_data *pdata = host->pdata; | |
563 | int context_loss = 0; | |
3796fb8a | 564 | u32 hctl, capa; |
11dd62a7 DK |
565 | unsigned long timeout; |
566 | ||
567 | if (pdata->get_context_loss_count) { | |
568 | context_loss = pdata->get_context_loss_count(host->dev); | |
569 | if (context_loss < 0) | |
570 | return 1; | |
571 | } | |
572 | ||
573 | dev_dbg(mmc_dev(host->mmc), "context was %slost\n", | |
574 | context_loss == host->context_loss ? "not " : ""); | |
575 | if (host->context_loss == context_loss) | |
576 | return 1; | |
577 | ||
6c31b215 V |
578 | if (!OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE) |
579 | return 1; | |
11dd62a7 | 580 | |
c2200efb | 581 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
11dd62a7 DK |
582 | if (host->power_mode != MMC_POWER_OFF && |
583 | (1 << ios->vdd) <= MMC_VDD_23_24) | |
584 | hctl = SDVS18; | |
585 | else | |
586 | hctl = SDVS30; | |
587 | capa = VS30 | VS18; | |
588 | } else { | |
589 | hctl = SDVS18; | |
590 | capa = VS18; | |
591 | } | |
592 | ||
593 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
594 | OMAP_HSMMC_READ(host->base, HCTL) | hctl); | |
595 | ||
596 | OMAP_HSMMC_WRITE(host->base, CAPA, | |
597 | OMAP_HSMMC_READ(host->base, CAPA) | capa); | |
598 | ||
599 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
600 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
601 | ||
602 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
603 | while ((OMAP_HSMMC_READ(host->base, HCTL) & SDBP) != SDBP | |
604 | && time_before(jiffies, timeout)) | |
605 | ; | |
606 | ||
b417577d | 607 | omap_hsmmc_disable_irq(host); |
11dd62a7 DK |
608 | |
609 | /* Do not initialize card-specific things if the power is off */ | |
610 | if (host->power_mode == MMC_POWER_OFF) | |
611 | goto out; | |
612 | ||
3796fb8a | 613 | omap_hsmmc_set_bus_width(host); |
11dd62a7 | 614 | |
5934df2f | 615 | omap_hsmmc_set_clock(host); |
11dd62a7 | 616 | |
3796fb8a AS |
617 | omap_hsmmc_set_bus_mode(host); |
618 | ||
11dd62a7 DK |
619 | out: |
620 | host->context_loss = context_loss; | |
621 | ||
622 | dev_dbg(mmc_dev(host->mmc), "context is restored\n"); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | /* | |
627 | * Save the MMC host context (store the number of power state changes so far). | |
628 | */ | |
70a3341a | 629 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
630 | { |
631 | struct omap_mmc_platform_data *pdata = host->pdata; | |
632 | int context_loss; | |
633 | ||
634 | if (pdata->get_context_loss_count) { | |
635 | context_loss = pdata->get_context_loss_count(host->dev); | |
636 | if (context_loss < 0) | |
637 | return; | |
638 | host->context_loss = context_loss; | |
639 | } | |
640 | } | |
641 | ||
642 | #else | |
643 | ||
70a3341a | 644 | static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host) |
11dd62a7 DK |
645 | { |
646 | return 0; | |
647 | } | |
648 | ||
70a3341a | 649 | static void omap_hsmmc_context_save(struct omap_hsmmc_host *host) |
11dd62a7 DK |
650 | { |
651 | } | |
652 | ||
653 | #endif | |
654 | ||
a45c6cb8 MC |
655 | /* |
656 | * Send init stream sequence to card | |
657 | * before sending IDLE command | |
658 | */ | |
70a3341a | 659 | static void send_init_stream(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
660 | { |
661 | int reg = 0; | |
662 | unsigned long timeout; | |
663 | ||
b62f6228 AH |
664 | if (host->protect_card) |
665 | return; | |
666 | ||
a45c6cb8 | 667 | disable_irq(host->irq); |
b417577d AH |
668 | |
669 | OMAP_HSMMC_WRITE(host->base, IE, INT_EN_MASK); | |
a45c6cb8 MC |
670 | OMAP_HSMMC_WRITE(host->base, CON, |
671 | OMAP_HSMMC_READ(host->base, CON) | INIT_STREAM); | |
672 | OMAP_HSMMC_WRITE(host->base, CMD, INIT_STREAM_CMD); | |
673 | ||
674 | timeout = jiffies + msecs_to_jiffies(MMC_TIMEOUT_MS); | |
675 | while ((reg != CC) && time_before(jiffies, timeout)) | |
676 | reg = OMAP_HSMMC_READ(host->base, STAT) & CC; | |
677 | ||
678 | OMAP_HSMMC_WRITE(host->base, CON, | |
679 | OMAP_HSMMC_READ(host->base, CON) & ~INIT_STREAM); | |
c653a6d4 AH |
680 | |
681 | OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); | |
682 | OMAP_HSMMC_READ(host->base, STAT); | |
683 | ||
a45c6cb8 MC |
684 | enable_irq(host->irq); |
685 | } | |
686 | ||
687 | static inline | |
70a3341a | 688 | int omap_hsmmc_cover_is_closed(struct omap_hsmmc_host *host) |
a45c6cb8 MC |
689 | { |
690 | int r = 1; | |
691 | ||
191d1f1d DK |
692 | if (mmc_slot(host).get_cover_state) |
693 | r = mmc_slot(host).get_cover_state(host->dev, host->slot_id); | |
a45c6cb8 MC |
694 | return r; |
695 | } | |
696 | ||
697 | static ssize_t | |
70a3341a | 698 | omap_hsmmc_show_cover_switch(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
699 | char *buf) |
700 | { | |
701 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 702 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 703 | |
70a3341a DK |
704 | return sprintf(buf, "%s\n", |
705 | omap_hsmmc_cover_is_closed(host) ? "closed" : "open"); | |
a45c6cb8 MC |
706 | } |
707 | ||
70a3341a | 708 | static DEVICE_ATTR(cover_switch, S_IRUGO, omap_hsmmc_show_cover_switch, NULL); |
a45c6cb8 MC |
709 | |
710 | static ssize_t | |
70a3341a | 711 | omap_hsmmc_show_slot_name(struct device *dev, struct device_attribute *attr, |
a45c6cb8 MC |
712 | char *buf) |
713 | { | |
714 | struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); | |
70a3341a | 715 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 716 | |
191d1f1d | 717 | return sprintf(buf, "%s\n", mmc_slot(host).name); |
a45c6cb8 MC |
718 | } |
719 | ||
70a3341a | 720 | static DEVICE_ATTR(slot_name, S_IRUGO, omap_hsmmc_show_slot_name, NULL); |
a45c6cb8 MC |
721 | |
722 | /* | |
723 | * Configure the response type and send the cmd. | |
724 | */ | |
725 | static void | |
70a3341a | 726 | omap_hsmmc_start_command(struct omap_hsmmc_host *host, struct mmc_command *cmd, |
a45c6cb8 MC |
727 | struct mmc_data *data) |
728 | { | |
729 | int cmdreg = 0, resptype = 0, cmdtype = 0; | |
730 | ||
8986d31b | 731 | dev_vdbg(mmc_dev(host->mmc), "%s: CMD%d, argument 0x%08x\n", |
a45c6cb8 MC |
732 | mmc_hostname(host->mmc), cmd->opcode, cmd->arg); |
733 | host->cmd = cmd; | |
734 | ||
93caf8e6 | 735 | omap_hsmmc_enable_irq(host, cmd); |
a45c6cb8 | 736 | |
4a694dc9 | 737 | host->response_busy = 0; |
a45c6cb8 MC |
738 | if (cmd->flags & MMC_RSP_PRESENT) { |
739 | if (cmd->flags & MMC_RSP_136) | |
740 | resptype = 1; | |
4a694dc9 AH |
741 | else if (cmd->flags & MMC_RSP_BUSY) { |
742 | resptype = 3; | |
743 | host->response_busy = 1; | |
744 | } else | |
a45c6cb8 MC |
745 | resptype = 2; |
746 | } | |
747 | ||
748 | /* | |
749 | * Unlike OMAP1 controller, the cmdtype does not seem to be based on | |
750 | * ac, bc, adtc, bcr. Only commands ending an open ended transfer need | |
751 | * a val of 0x3, rest 0x0. | |
752 | */ | |
753 | if (cmd == host->mrq->stop) | |
754 | cmdtype = 0x3; | |
755 | ||
756 | cmdreg = (cmd->opcode << 24) | (resptype << 16) | (cmdtype << 22); | |
757 | ||
758 | if (data) { | |
759 | cmdreg |= DP_SELECT | MSBS | BCE; | |
760 | if (data->flags & MMC_DATA_READ) | |
761 | cmdreg |= DDIR; | |
762 | else | |
763 | cmdreg &= ~(DDIR); | |
764 | } | |
765 | ||
766 | if (host->use_dma) | |
767 | cmdreg |= DMA_EN; | |
768 | ||
b417577d | 769 | host->req_in_progress = 1; |
4dffd7a2 | 770 | |
a45c6cb8 MC |
771 | OMAP_HSMMC_WRITE(host->base, ARG, cmd->arg); |
772 | OMAP_HSMMC_WRITE(host->base, CMD, cmdreg); | |
773 | } | |
774 | ||
0ccd76d4 | 775 | static int |
70a3341a | 776 | omap_hsmmc_get_dma_dir(struct omap_hsmmc_host *host, struct mmc_data *data) |
0ccd76d4 JY |
777 | { |
778 | if (data->flags & MMC_DATA_WRITE) | |
779 | return DMA_TO_DEVICE; | |
780 | else | |
781 | return DMA_FROM_DEVICE; | |
782 | } | |
783 | ||
c5c98927 RK |
784 | static struct dma_chan *omap_hsmmc_get_dma_chan(struct omap_hsmmc_host *host, |
785 | struct mmc_data *data) | |
786 | { | |
787 | return data->flags & MMC_DATA_WRITE ? host->tx_chan : host->rx_chan; | |
788 | } | |
789 | ||
b417577d AH |
790 | static void omap_hsmmc_request_done(struct omap_hsmmc_host *host, struct mmc_request *mrq) |
791 | { | |
792 | int dma_ch; | |
31463b14 | 793 | unsigned long flags; |
b417577d | 794 | |
31463b14 | 795 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
796 | host->req_in_progress = 0; |
797 | dma_ch = host->dma_ch; | |
31463b14 | 798 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
799 | |
800 | omap_hsmmc_disable_irq(host); | |
801 | /* Do not complete the request if DMA is still in progress */ | |
802 | if (mrq->data && host->use_dma && dma_ch != -1) | |
803 | return; | |
804 | host->mrq = NULL; | |
805 | mmc_request_done(host->mmc, mrq); | |
806 | } | |
807 | ||
a45c6cb8 MC |
808 | /* |
809 | * Notify the transfer complete to MMC core | |
810 | */ | |
811 | static void | |
70a3341a | 812 | omap_hsmmc_xfer_done(struct omap_hsmmc_host *host, struct mmc_data *data) |
a45c6cb8 | 813 | { |
4a694dc9 AH |
814 | if (!data) { |
815 | struct mmc_request *mrq = host->mrq; | |
816 | ||
23050103 AH |
817 | /* TC before CC from CMD6 - don't know why, but it happens */ |
818 | if (host->cmd && host->cmd->opcode == 6 && | |
819 | host->response_busy) { | |
820 | host->response_busy = 0; | |
821 | return; | |
822 | } | |
823 | ||
b417577d | 824 | omap_hsmmc_request_done(host, mrq); |
4a694dc9 AH |
825 | return; |
826 | } | |
827 | ||
a45c6cb8 MC |
828 | host->data = NULL; |
829 | ||
a45c6cb8 MC |
830 | if (!data->error) |
831 | data->bytes_xfered += data->blocks * (data->blksz); | |
832 | else | |
833 | data->bytes_xfered = 0; | |
834 | ||
fe852273 | 835 | if (!data->stop) { |
b417577d | 836 | omap_hsmmc_request_done(host, data->mrq); |
fe852273 | 837 | return; |
a45c6cb8 | 838 | } |
fe852273 | 839 | omap_hsmmc_start_command(host, data->stop, NULL); |
a45c6cb8 MC |
840 | } |
841 | ||
842 | /* | |
843 | * Notify the core about command completion | |
844 | */ | |
845 | static void | |
70a3341a | 846 | omap_hsmmc_cmd_done(struct omap_hsmmc_host *host, struct mmc_command *cmd) |
a45c6cb8 MC |
847 | { |
848 | host->cmd = NULL; | |
849 | ||
850 | if (cmd->flags & MMC_RSP_PRESENT) { | |
851 | if (cmd->flags & MMC_RSP_136) { | |
852 | /* response type 2 */ | |
853 | cmd->resp[3] = OMAP_HSMMC_READ(host->base, RSP10); | |
854 | cmd->resp[2] = OMAP_HSMMC_READ(host->base, RSP32); | |
855 | cmd->resp[1] = OMAP_HSMMC_READ(host->base, RSP54); | |
856 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP76); | |
857 | } else { | |
858 | /* response types 1, 1b, 3, 4, 5, 6 */ | |
859 | cmd->resp[0] = OMAP_HSMMC_READ(host->base, RSP10); | |
860 | } | |
861 | } | |
b417577d AH |
862 | if ((host->data == NULL && !host->response_busy) || cmd->error) |
863 | omap_hsmmc_request_done(host, cmd->mrq); | |
a45c6cb8 MC |
864 | } |
865 | ||
866 | /* | |
867 | * DMA clean up for command errors | |
868 | */ | |
70a3341a | 869 | static void omap_hsmmc_dma_cleanup(struct omap_hsmmc_host *host, int errno) |
a45c6cb8 | 870 | { |
b417577d | 871 | int dma_ch; |
31463b14 | 872 | unsigned long flags; |
b417577d | 873 | |
82788ff5 | 874 | host->data->error = errno; |
a45c6cb8 | 875 | |
31463b14 | 876 | spin_lock_irqsave(&host->irq_lock, flags); |
b417577d AH |
877 | dma_ch = host->dma_ch; |
878 | host->dma_ch = -1; | |
31463b14 | 879 | spin_unlock_irqrestore(&host->irq_lock, flags); |
b417577d AH |
880 | |
881 | if (host->use_dma && dma_ch != -1) { | |
c5c98927 RK |
882 | struct dma_chan *chan = omap_hsmmc_get_dma_chan(host, host->data); |
883 | ||
884 | dmaengine_terminate_all(chan); | |
885 | dma_unmap_sg(chan->device->dev, | |
886 | host->data->sg, host->data->sg_len, | |
70a3341a | 887 | omap_hsmmc_get_dma_dir(host, host->data)); |
c5c98927 | 888 | |
053bf34f | 889 | host->data->host_cookie = 0; |
a45c6cb8 MC |
890 | } |
891 | host->data = NULL; | |
a45c6cb8 MC |
892 | } |
893 | ||
894 | /* | |
895 | * Readable error output | |
896 | */ | |
897 | #ifdef CONFIG_MMC_DEBUG | |
699b958b | 898 | static void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, u32 status) |
a45c6cb8 MC |
899 | { |
900 | /* --- means reserved bit without definition at documentation */ | |
70a3341a | 901 | static const char *omap_hsmmc_status_bits[] = { |
699b958b AH |
902 | "CC" , "TC" , "BGE", "---", "BWR" , "BRR" , "---" , "---" , |
903 | "CIRQ", "OBI" , "---", "---", "---" , "---" , "---" , "ERRI", | |
904 | "CTO" , "CCRC", "CEB", "CIE", "DTO" , "DCRC", "DEB" , "---" , | |
905 | "ACE" , "---" , "---", "---", "CERR", "BADA", "---" , "---" | |
a45c6cb8 MC |
906 | }; |
907 | char res[256]; | |
908 | char *buf = res; | |
909 | int len, i; | |
910 | ||
911 | len = sprintf(buf, "MMC IRQ 0x%x :", status); | |
912 | buf += len; | |
913 | ||
70a3341a | 914 | for (i = 0; i < ARRAY_SIZE(omap_hsmmc_status_bits); i++) |
a45c6cb8 | 915 | if (status & (1 << i)) { |
70a3341a | 916 | len = sprintf(buf, " %s", omap_hsmmc_status_bits[i]); |
a45c6cb8 MC |
917 | buf += len; |
918 | } | |
919 | ||
8986d31b | 920 | dev_vdbg(mmc_dev(host->mmc), "%s\n", res); |
a45c6cb8 | 921 | } |
699b958b AH |
922 | #else |
923 | static inline void omap_hsmmc_dbg_report_irq(struct omap_hsmmc_host *host, | |
924 | u32 status) | |
925 | { | |
926 | } | |
a45c6cb8 MC |
927 | #endif /* CONFIG_MMC_DEBUG */ |
928 | ||
3ebf74b1 JP |
929 | /* |
930 | * MMC controller internal state machines reset | |
931 | * | |
932 | * Used to reset command or data internal state machines, using respectively | |
933 | * SRC or SRD bit of SYSCTL register | |
934 | * Can be called from interrupt context | |
935 | */ | |
70a3341a DK |
936 | static inline void omap_hsmmc_reset_controller_fsm(struct omap_hsmmc_host *host, |
937 | unsigned long bit) | |
3ebf74b1 JP |
938 | { |
939 | unsigned long i = 0; | |
940 | unsigned long limit = (loops_per_jiffy * | |
941 | msecs_to_jiffies(MMC_TIMEOUT_MS)); | |
942 | ||
943 | OMAP_HSMMC_WRITE(host->base, SYSCTL, | |
944 | OMAP_HSMMC_READ(host->base, SYSCTL) | bit); | |
945 | ||
07ad64b6 MC |
946 | /* |
947 | * OMAP4 ES2 and greater has an updated reset logic. | |
948 | * Monitor a 0->1 transition first | |
949 | */ | |
950 | if (mmc_slot(host).features & HSMMC_HAS_UPDATED_RESET) { | |
b432b4b3 | 951 | while ((!(OMAP_HSMMC_READ(host->base, SYSCTL) & bit)) |
07ad64b6 MC |
952 | && (i++ < limit)) |
953 | cpu_relax(); | |
954 | } | |
955 | i = 0; | |
956 | ||
3ebf74b1 JP |
957 | while ((OMAP_HSMMC_READ(host->base, SYSCTL) & bit) && |
958 | (i++ < limit)) | |
959 | cpu_relax(); | |
960 | ||
961 | if (OMAP_HSMMC_READ(host->base, SYSCTL) & bit) | |
962 | dev_err(mmc_dev(host->mmc), | |
963 | "Timeout waiting on controller reset in %s\n", | |
964 | __func__); | |
965 | } | |
a45c6cb8 | 966 | |
b417577d | 967 | static void omap_hsmmc_do_irq(struct omap_hsmmc_host *host, int status) |
a45c6cb8 | 968 | { |
a45c6cb8 | 969 | struct mmc_data *data; |
b417577d AH |
970 | int end_cmd = 0, end_trans = 0; |
971 | ||
a45c6cb8 | 972 | data = host->data; |
8986d31b | 973 | dev_vdbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status); |
a45c6cb8 MC |
974 | |
975 | if (status & ERR) { | |
699b958b | 976 | omap_hsmmc_dbg_report_irq(host, status); |
a45c6cb8 MC |
977 | if ((status & CMD_TIMEOUT) || |
978 | (status & CMD_CRC)) { | |
979 | if (host->cmd) { | |
980 | if (status & CMD_TIMEOUT) { | |
70a3341a DK |
981 | omap_hsmmc_reset_controller_fsm(host, |
982 | SRC); | |
a45c6cb8 MC |
983 | host->cmd->error = -ETIMEDOUT; |
984 | } else { | |
985 | host->cmd->error = -EILSEQ; | |
986 | } | |
987 | end_cmd = 1; | |
988 | } | |
4a694dc9 AH |
989 | if (host->data || host->response_busy) { |
990 | if (host->data) | |
70a3341a DK |
991 | omap_hsmmc_dma_cleanup(host, |
992 | -ETIMEDOUT); | |
4a694dc9 | 993 | host->response_busy = 0; |
70a3341a | 994 | omap_hsmmc_reset_controller_fsm(host, SRD); |
c232f457 | 995 | } |
a45c6cb8 MC |
996 | } |
997 | if ((status & DATA_TIMEOUT) || | |
998 | (status & DATA_CRC)) { | |
4a694dc9 AH |
999 | if (host->data || host->response_busy) { |
1000 | int err = (status & DATA_TIMEOUT) ? | |
1001 | -ETIMEDOUT : -EILSEQ; | |
1002 | ||
1003 | if (host->data) | |
70a3341a | 1004 | omap_hsmmc_dma_cleanup(host, err); |
a45c6cb8 | 1005 | else |
4a694dc9 AH |
1006 | host->mrq->cmd->error = err; |
1007 | host->response_busy = 0; | |
70a3341a | 1008 | omap_hsmmc_reset_controller_fsm(host, SRD); |
a45c6cb8 MC |
1009 | end_trans = 1; |
1010 | } | |
1011 | } | |
1012 | if (status & CARD_ERR) { | |
1013 | dev_dbg(mmc_dev(host->mmc), | |
1014 | "Ignoring card err CMD%d\n", host->cmd->opcode); | |
1015 | if (host->cmd) | |
1016 | end_cmd = 1; | |
1017 | if (host->data) | |
1018 | end_trans = 1; | |
1019 | } | |
1020 | } | |
1021 | ||
a8fe29d8 | 1022 | if (end_cmd || ((status & CC) && host->cmd)) |
70a3341a | 1023 | omap_hsmmc_cmd_done(host, host->cmd); |
0a40e647 | 1024 | if ((end_trans || (status & TC)) && host->mrq) |
70a3341a | 1025 | omap_hsmmc_xfer_done(host, data); |
b417577d | 1026 | } |
a45c6cb8 | 1027 | |
b417577d AH |
1028 | /* |
1029 | * MMC controller IRQ handler | |
1030 | */ | |
1031 | static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) | |
1032 | { | |
1033 | struct omap_hsmmc_host *host = dev_id; | |
1034 | int status; | |
1035 | ||
1036 | status = OMAP_HSMMC_READ(host->base, STAT); | |
1f6b9fa4 | 1037 | while (status & INT_EN_MASK && host->req_in_progress) { |
b417577d | 1038 | omap_hsmmc_do_irq(host, status); |
1f6b9fa4 | 1039 | |
b417577d | 1040 | /* Flush posted write */ |
1f6b9fa4 | 1041 | OMAP_HSMMC_WRITE(host->base, STAT, status); |
b417577d | 1042 | status = OMAP_HSMMC_READ(host->base, STAT); |
1f6b9fa4 | 1043 | } |
4dffd7a2 | 1044 | |
a45c6cb8 MC |
1045 | return IRQ_HANDLED; |
1046 | } | |
1047 | ||
70a3341a | 1048 | static void set_sd_bus_power(struct omap_hsmmc_host *host) |
e13bb300 AH |
1049 | { |
1050 | unsigned long i; | |
1051 | ||
1052 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
1053 | OMAP_HSMMC_READ(host->base, HCTL) | SDBP); | |
1054 | for (i = 0; i < loops_per_jiffy; i++) { | |
1055 | if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP) | |
1056 | break; | |
1057 | cpu_relax(); | |
1058 | } | |
1059 | } | |
1060 | ||
a45c6cb8 | 1061 | /* |
eb250826 DB |
1062 | * Switch MMC interface voltage ... only relevant for MMC1. |
1063 | * | |
1064 | * MMC2 and MMC3 use fixed 1.8V levels, and maybe a transceiver. | |
1065 | * The MMC2 transceiver controls are used instead of DAT4..DAT7. | |
1066 | * Some chips, like eMMC ones, use internal transceivers. | |
a45c6cb8 | 1067 | */ |
70a3341a | 1068 | static int omap_hsmmc_switch_opcond(struct omap_hsmmc_host *host, int vdd) |
a45c6cb8 MC |
1069 | { |
1070 | u32 reg_val = 0; | |
1071 | int ret; | |
1072 | ||
1073 | /* Disable the clocks */ | |
fa4aa2d4 | 1074 | pm_runtime_put_sync(host->dev); |
cd03d9a8 | 1075 | if (host->dbclk) |
94c18149 | 1076 | clk_disable_unprepare(host->dbclk); |
a45c6cb8 MC |
1077 | |
1078 | /* Turn the power off */ | |
1079 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); | |
a45c6cb8 MC |
1080 | |
1081 | /* Turn the power ON with given VDD 1.8 or 3.0v */ | |
2bec0893 AH |
1082 | if (!ret) |
1083 | ret = mmc_slot(host).set_power(host->dev, host->slot_id, 1, | |
1084 | vdd); | |
fa4aa2d4 | 1085 | pm_runtime_get_sync(host->dev); |
cd03d9a8 | 1086 | if (host->dbclk) |
94c18149 | 1087 | clk_prepare_enable(host->dbclk); |
2bec0893 | 1088 | |
a45c6cb8 MC |
1089 | if (ret != 0) |
1090 | goto err; | |
1091 | ||
a45c6cb8 MC |
1092 | OMAP_HSMMC_WRITE(host->base, HCTL, |
1093 | OMAP_HSMMC_READ(host->base, HCTL) & SDVSCLR); | |
1094 | reg_val = OMAP_HSMMC_READ(host->base, HCTL); | |
eb250826 | 1095 | |
a45c6cb8 MC |
1096 | /* |
1097 | * If a MMC dual voltage card is detected, the set_ios fn calls | |
1098 | * this fn with VDD bit set for 1.8V. Upon card removal from the | |
70a3341a | 1099 | * slot, omap_hsmmc_set_ios sets the VDD back to 3V on MMC_POWER_OFF. |
a45c6cb8 | 1100 | * |
eb250826 DB |
1101 | * Cope with a bit of slop in the range ... per data sheets: |
1102 | * - "1.8V" for vdds_mmc1/vdds_mmc1a can be up to 2.45V max, | |
1103 | * but recommended values are 1.71V to 1.89V | |
1104 | * - "3.0V" for vdds_mmc1/vdds_mmc1a can be up to 3.5V max, | |
1105 | * but recommended values are 2.7V to 3.3V | |
1106 | * | |
1107 | * Board setup code shouldn't permit anything very out-of-range. | |
1108 | * TWL4030-family VMMC1 and VSIM regulators are fine (avoiding the | |
1109 | * middle range) but VSIM can't power DAT4..DAT7 at more than 3V. | |
a45c6cb8 | 1110 | */ |
eb250826 | 1111 | if ((1 << vdd) <= MMC_VDD_23_24) |
a45c6cb8 | 1112 | reg_val |= SDVS18; |
eb250826 DB |
1113 | else |
1114 | reg_val |= SDVS30; | |
a45c6cb8 MC |
1115 | |
1116 | OMAP_HSMMC_WRITE(host->base, HCTL, reg_val); | |
e13bb300 | 1117 | set_sd_bus_power(host); |
a45c6cb8 MC |
1118 | |
1119 | return 0; | |
1120 | err: | |
1121 | dev_dbg(mmc_dev(host->mmc), "Unable to switch operating voltage\n"); | |
1122 | return ret; | |
1123 | } | |
1124 | ||
b62f6228 AH |
1125 | /* Protect the card while the cover is open */ |
1126 | static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host) | |
1127 | { | |
1128 | if (!mmc_slot(host).get_cover_state) | |
1129 | return; | |
1130 | ||
1131 | host->reqs_blocked = 0; | |
1132 | if (mmc_slot(host).get_cover_state(host->dev, host->slot_id)) { | |
1133 | if (host->protect_card) { | |
2cecdf00 | 1134 | dev_info(host->dev, "%s: cover is closed, " |
b62f6228 AH |
1135 | "card is now accessible\n", |
1136 | mmc_hostname(host->mmc)); | |
1137 | host->protect_card = 0; | |
1138 | } | |
1139 | } else { | |
1140 | if (!host->protect_card) { | |
2cecdf00 | 1141 | dev_info(host->dev, "%s: cover is open, " |
b62f6228 AH |
1142 | "card is now inaccessible\n", |
1143 | mmc_hostname(host->mmc)); | |
1144 | host->protect_card = 1; | |
1145 | } | |
1146 | } | |
1147 | } | |
1148 | ||
a45c6cb8 | 1149 | /* |
7efab4f3 | 1150 | * irq handler to notify the core about card insertion/removal |
a45c6cb8 | 1151 | */ |
7efab4f3 | 1152 | static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id) |
a45c6cb8 | 1153 | { |
7efab4f3 | 1154 | struct omap_hsmmc_host *host = dev_id; |
249d0fa9 | 1155 | struct omap_mmc_slot_data *slot = &mmc_slot(host); |
a6b2240d AH |
1156 | int carddetect; |
1157 | ||
1158 | if (host->suspended) | |
7efab4f3 | 1159 | return IRQ_HANDLED; |
a6b2240d AH |
1160 | |
1161 | sysfs_notify(&host->mmc->class_dev.kobj, NULL, "cover_switch"); | |
249d0fa9 | 1162 | |
191d1f1d | 1163 | if (slot->card_detect) |
db0fefc5 | 1164 | carddetect = slot->card_detect(host->dev, host->slot_id); |
b62f6228 AH |
1165 | else { |
1166 | omap_hsmmc_protect_card(host); | |
a6b2240d | 1167 | carddetect = -ENOSYS; |
b62f6228 | 1168 | } |
a45c6cb8 | 1169 | |
cdeebadd | 1170 | if (carddetect) |
a45c6cb8 | 1171 | mmc_detect_change(host->mmc, (HZ * 200) / 1000); |
cdeebadd | 1172 | else |
a45c6cb8 | 1173 | mmc_detect_change(host->mmc, (HZ * 50) / 1000); |
a45c6cb8 MC |
1174 | return IRQ_HANDLED; |
1175 | } | |
1176 | ||
c5c98927 | 1177 | static void omap_hsmmc_dma_callback(void *param) |
a45c6cb8 | 1178 | { |
c5c98927 RK |
1179 | struct omap_hsmmc_host *host = param; |
1180 | struct dma_chan *chan; | |
770d7432 | 1181 | struct mmc_data *data; |
c5c98927 | 1182 | int req_in_progress; |
a45c6cb8 | 1183 | |
c5c98927 | 1184 | spin_lock_irq(&host->irq_lock); |
b417577d | 1185 | if (host->dma_ch < 0) { |
c5c98927 | 1186 | spin_unlock_irq(&host->irq_lock); |
a45c6cb8 | 1187 | return; |
b417577d | 1188 | } |
a45c6cb8 | 1189 | |
770d7432 | 1190 | data = host->mrq->data; |
c5c98927 | 1191 | chan = omap_hsmmc_get_dma_chan(host, data); |
9782aff8 | 1192 | if (!data->host_cookie) |
c5c98927 RK |
1193 | dma_unmap_sg(chan->device->dev, |
1194 | data->sg, data->sg_len, | |
9782aff8 | 1195 | omap_hsmmc_get_dma_dir(host, data)); |
b417577d AH |
1196 | |
1197 | req_in_progress = host->req_in_progress; | |
a45c6cb8 | 1198 | host->dma_ch = -1; |
c5c98927 | 1199 | spin_unlock_irq(&host->irq_lock); |
b417577d AH |
1200 | |
1201 | /* If DMA has finished after TC, complete the request */ | |
1202 | if (!req_in_progress) { | |
1203 | struct mmc_request *mrq = host->mrq; | |
1204 | ||
1205 | host->mrq = NULL; | |
1206 | mmc_request_done(host->mmc, mrq); | |
1207 | } | |
a45c6cb8 MC |
1208 | } |
1209 | ||
9782aff8 PF |
1210 | static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host, |
1211 | struct mmc_data *data, | |
c5c98927 | 1212 | struct omap_hsmmc_next *next, |
26b88520 | 1213 | struct dma_chan *chan) |
9782aff8 PF |
1214 | { |
1215 | int dma_len; | |
1216 | ||
1217 | if (!next && data->host_cookie && | |
1218 | data->host_cookie != host->next_data.cookie) { | |
2cecdf00 | 1219 | dev_warn(host->dev, "[%s] invalid cookie: data->host_cookie %d" |
9782aff8 PF |
1220 | " host->next_data.cookie %d\n", |
1221 | __func__, data->host_cookie, host->next_data.cookie); | |
1222 | data->host_cookie = 0; | |
1223 | } | |
1224 | ||
1225 | /* Check if next job is already prepared */ | |
1226 | if (next || | |
1227 | (!next && data->host_cookie != host->next_data.cookie)) { | |
26b88520 | 1228 | dma_len = dma_map_sg(chan->device->dev, data->sg, data->sg_len, |
9782aff8 PF |
1229 | omap_hsmmc_get_dma_dir(host, data)); |
1230 | ||
1231 | } else { | |
1232 | dma_len = host->next_data.dma_len; | |
1233 | host->next_data.dma_len = 0; | |
1234 | } | |
1235 | ||
1236 | ||
1237 | if (dma_len == 0) | |
1238 | return -EINVAL; | |
1239 | ||
1240 | if (next) { | |
1241 | next->dma_len = dma_len; | |
1242 | data->host_cookie = ++next->cookie < 0 ? 1 : next->cookie; | |
1243 | } else | |
1244 | host->dma_len = dma_len; | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
a45c6cb8 MC |
1249 | /* |
1250 | * Routine to configure and start DMA for the MMC card | |
1251 | */ | |
70a3341a DK |
1252 | static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host, |
1253 | struct mmc_request *req) | |
a45c6cb8 | 1254 | { |
26b88520 RK |
1255 | struct dma_slave_config cfg; |
1256 | struct dma_async_tx_descriptor *tx; | |
1257 | int ret = 0, i; | |
a45c6cb8 | 1258 | struct mmc_data *data = req->data; |
c5c98927 | 1259 | struct dma_chan *chan; |
a45c6cb8 | 1260 | |
0ccd76d4 | 1261 | /* Sanity check: all the SG entries must be aligned by block size. */ |
a3f406f8 | 1262 | for (i = 0; i < data->sg_len; i++) { |
0ccd76d4 JY |
1263 | struct scatterlist *sgl; |
1264 | ||
1265 | sgl = data->sg + i; | |
1266 | if (sgl->length % data->blksz) | |
1267 | return -EINVAL; | |
1268 | } | |
1269 | if ((data->blksz % 4) != 0) | |
1270 | /* REVISIT: The MMC buffer increments only when MSB is written. | |
1271 | * Return error for blksz which is non multiple of four. | |
1272 | */ | |
1273 | return -EINVAL; | |
1274 | ||
b417577d | 1275 | BUG_ON(host->dma_ch != -1); |
a45c6cb8 | 1276 | |
c5c98927 | 1277 | chan = omap_hsmmc_get_dma_chan(host, data); |
c5c98927 | 1278 | |
26b88520 RK |
1279 | cfg.src_addr = host->mapbase + OMAP_HSMMC_DATA; |
1280 | cfg.dst_addr = host->mapbase + OMAP_HSMMC_DATA; | |
1281 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
1282 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
1283 | cfg.src_maxburst = data->blksz / 4; | |
1284 | cfg.dst_maxburst = data->blksz / 4; | |
c5c98927 | 1285 | |
26b88520 RK |
1286 | ret = dmaengine_slave_config(chan, &cfg); |
1287 | if (ret) | |
a45c6cb8 | 1288 | return ret; |
c5c98927 | 1289 | |
26b88520 | 1290 | ret = omap_hsmmc_pre_dma_transfer(host, data, NULL, chan); |
9782aff8 PF |
1291 | if (ret) |
1292 | return ret; | |
a45c6cb8 | 1293 | |
26b88520 RK |
1294 | tx = dmaengine_prep_slave_sg(chan, data->sg, data->sg_len, |
1295 | data->flags & MMC_DATA_WRITE ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM, | |
1296 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
1297 | if (!tx) { | |
1298 | dev_err(mmc_dev(host->mmc), "prep_slave_sg() failed\n"); | |
1299 | /* FIXME: cleanup */ | |
1300 | return -1; | |
1301 | } | |
a45c6cb8 | 1302 | |
26b88520 RK |
1303 | tx->callback = omap_hsmmc_dma_callback; |
1304 | tx->callback_param = host; | |
a45c6cb8 | 1305 | |
26b88520 RK |
1306 | /* Does not fail */ |
1307 | dmaengine_submit(tx); | |
c5c98927 | 1308 | |
26b88520 | 1309 | host->dma_ch = 1; |
c5c98927 | 1310 | |
26b88520 | 1311 | dma_async_issue_pending(chan); |
a45c6cb8 | 1312 | |
a45c6cb8 MC |
1313 | return 0; |
1314 | } | |
1315 | ||
70a3341a | 1316 | static void set_data_timeout(struct omap_hsmmc_host *host, |
e2bf08d6 AH |
1317 | unsigned int timeout_ns, |
1318 | unsigned int timeout_clks) | |
a45c6cb8 MC |
1319 | { |
1320 | unsigned int timeout, cycle_ns; | |
1321 | uint32_t reg, clkd, dto = 0; | |
1322 | ||
1323 | reg = OMAP_HSMMC_READ(host->base, SYSCTL); | |
1324 | clkd = (reg & CLKD_MASK) >> CLKD_SHIFT; | |
1325 | if (clkd == 0) | |
1326 | clkd = 1; | |
1327 | ||
1328 | cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd); | |
e2bf08d6 AH |
1329 | timeout = timeout_ns / cycle_ns; |
1330 | timeout += timeout_clks; | |
a45c6cb8 MC |
1331 | if (timeout) { |
1332 | while ((timeout & 0x80000000) == 0) { | |
1333 | dto += 1; | |
1334 | timeout <<= 1; | |
1335 | } | |
1336 | dto = 31 - dto; | |
1337 | timeout <<= 1; | |
1338 | if (timeout && dto) | |
1339 | dto += 1; | |
1340 | if (dto >= 13) | |
1341 | dto -= 13; | |
1342 | else | |
1343 | dto = 0; | |
1344 | if (dto > 14) | |
1345 | dto = 14; | |
1346 | } | |
1347 | ||
1348 | reg &= ~DTO_MASK; | |
1349 | reg |= dto << DTO_SHIFT; | |
1350 | OMAP_HSMMC_WRITE(host->base, SYSCTL, reg); | |
1351 | } | |
1352 | ||
1353 | /* | |
1354 | * Configure block length for MMC/SD cards and initiate the transfer. | |
1355 | */ | |
1356 | static int | |
70a3341a | 1357 | omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req) |
a45c6cb8 MC |
1358 | { |
1359 | int ret; | |
1360 | host->data = req->data; | |
1361 | ||
1362 | if (req->data == NULL) { | |
a45c6cb8 | 1363 | OMAP_HSMMC_WRITE(host->base, BLK, 0); |
e2bf08d6 AH |
1364 | /* |
1365 | * Set an arbitrary 100ms data timeout for commands with | |
1366 | * busy signal. | |
1367 | */ | |
1368 | if (req->cmd->flags & MMC_RSP_BUSY) | |
1369 | set_data_timeout(host, 100000000U, 0); | |
a45c6cb8 MC |
1370 | return 0; |
1371 | } | |
1372 | ||
1373 | OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz) | |
1374 | | (req->data->blocks << 16)); | |
e2bf08d6 | 1375 | set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks); |
a45c6cb8 | 1376 | |
a45c6cb8 | 1377 | if (host->use_dma) { |
70a3341a | 1378 | ret = omap_hsmmc_start_dma_transfer(host, req); |
a45c6cb8 MC |
1379 | if (ret != 0) { |
1380 | dev_dbg(mmc_dev(host->mmc), "MMC start dma failure\n"); | |
1381 | return ret; | |
1382 | } | |
1383 | } | |
1384 | return 0; | |
1385 | } | |
1386 | ||
9782aff8 PF |
1387 | static void omap_hsmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, |
1388 | int err) | |
1389 | { | |
1390 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1391 | struct mmc_data *data = mrq->data; | |
1392 | ||
26b88520 | 1393 | if (host->use_dma && data->host_cookie) { |
c5c98927 | 1394 | struct dma_chan *c = omap_hsmmc_get_dma_chan(host, data); |
c5c98927 | 1395 | |
26b88520 RK |
1396 | dma_unmap_sg(c->device->dev, data->sg, data->sg_len, |
1397 | omap_hsmmc_get_dma_dir(host, data)); | |
9782aff8 PF |
1398 | data->host_cookie = 0; |
1399 | } | |
1400 | } | |
1401 | ||
1402 | static void omap_hsmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq, | |
1403 | bool is_first_req) | |
1404 | { | |
1405 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1406 | ||
1407 | if (mrq->data->host_cookie) { | |
1408 | mrq->data->host_cookie = 0; | |
1409 | return ; | |
1410 | } | |
1411 | ||
c5c98927 RK |
1412 | if (host->use_dma) { |
1413 | struct dma_chan *c = omap_hsmmc_get_dma_chan(host, mrq->data); | |
c5c98927 | 1414 | |
9782aff8 | 1415 | if (omap_hsmmc_pre_dma_transfer(host, mrq->data, |
26b88520 | 1416 | &host->next_data, c)) |
9782aff8 | 1417 | mrq->data->host_cookie = 0; |
c5c98927 | 1418 | } |
9782aff8 PF |
1419 | } |
1420 | ||
a45c6cb8 MC |
1421 | /* |
1422 | * Request function. for read/write operation | |
1423 | */ | |
70a3341a | 1424 | static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req) |
a45c6cb8 | 1425 | { |
70a3341a | 1426 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3f406f8 | 1427 | int err; |
a45c6cb8 | 1428 | |
b417577d AH |
1429 | BUG_ON(host->req_in_progress); |
1430 | BUG_ON(host->dma_ch != -1); | |
1431 | if (host->protect_card) { | |
1432 | if (host->reqs_blocked < 3) { | |
1433 | /* | |
1434 | * Ensure the controller is left in a consistent | |
1435 | * state by resetting the command and data state | |
1436 | * machines. | |
1437 | */ | |
1438 | omap_hsmmc_reset_controller_fsm(host, SRD); | |
1439 | omap_hsmmc_reset_controller_fsm(host, SRC); | |
1440 | host->reqs_blocked += 1; | |
1441 | } | |
1442 | req->cmd->error = -EBADF; | |
1443 | if (req->data) | |
1444 | req->data->error = -EBADF; | |
1445 | req->cmd->retries = 0; | |
1446 | mmc_request_done(mmc, req); | |
1447 | return; | |
1448 | } else if (host->reqs_blocked) | |
1449 | host->reqs_blocked = 0; | |
a45c6cb8 MC |
1450 | WARN_ON(host->mrq != NULL); |
1451 | host->mrq = req; | |
70a3341a | 1452 | err = omap_hsmmc_prepare_data(host, req); |
a3f406f8 JL |
1453 | if (err) { |
1454 | req->cmd->error = err; | |
1455 | if (req->data) | |
1456 | req->data->error = err; | |
1457 | host->mrq = NULL; | |
1458 | mmc_request_done(mmc, req); | |
1459 | return; | |
1460 | } | |
1461 | ||
70a3341a | 1462 | omap_hsmmc_start_command(host, req->cmd, req->data); |
a45c6cb8 MC |
1463 | } |
1464 | ||
a45c6cb8 | 1465 | /* Routine to configure clock values. Exposed API to core */ |
70a3341a | 1466 | static void omap_hsmmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
a45c6cb8 | 1467 | { |
70a3341a | 1468 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a3621465 | 1469 | int do_send_init_stream = 0; |
a45c6cb8 | 1470 | |
fa4aa2d4 | 1471 | pm_runtime_get_sync(host->dev); |
5e2ea617 | 1472 | |
a3621465 AH |
1473 | if (ios->power_mode != host->power_mode) { |
1474 | switch (ios->power_mode) { | |
1475 | case MMC_POWER_OFF: | |
1476 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1477 | 0, 0); | |
1478 | break; | |
1479 | case MMC_POWER_UP: | |
1480 | mmc_slot(host).set_power(host->dev, host->slot_id, | |
1481 | 1, ios->vdd); | |
1482 | break; | |
1483 | case MMC_POWER_ON: | |
1484 | do_send_init_stream = 1; | |
1485 | break; | |
1486 | } | |
1487 | host->power_mode = ios->power_mode; | |
a45c6cb8 MC |
1488 | } |
1489 | ||
dd498eff DK |
1490 | /* FIXME: set registers based only on changes to ios */ |
1491 | ||
3796fb8a | 1492 | omap_hsmmc_set_bus_width(host); |
a45c6cb8 | 1493 | |
4621d5f8 | 1494 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
eb250826 DB |
1495 | /* Only MMC1 can interface at 3V without some flavor |
1496 | * of external transceiver; but they all handle 1.8V. | |
1497 | */ | |
a45c6cb8 | 1498 | if ((OMAP_HSMMC_READ(host->base, HCTL) & SDVSDET) && |
1f84b71b RN |
1499 | (ios->vdd == DUAL_VOLT_OCR_BIT) && |
1500 | /* | |
1501 | * With pbias cell programming missing, this | |
1502 | * can't be allowed when booting with device | |
1503 | * tree. | |
1504 | */ | |
4d048f91 | 1505 | !host->dev->of_node) { |
a45c6cb8 MC |
1506 | /* |
1507 | * The mmc_select_voltage fn of the core does | |
1508 | * not seem to set the power_mode to | |
1509 | * MMC_POWER_UP upon recalculating the voltage. | |
1510 | * vdd 1.8v. | |
1511 | */ | |
70a3341a DK |
1512 | if (omap_hsmmc_switch_opcond(host, ios->vdd) != 0) |
1513 | dev_dbg(mmc_dev(host->mmc), | |
a45c6cb8 MC |
1514 | "Switch operation failed\n"); |
1515 | } | |
1516 | } | |
1517 | ||
5934df2f | 1518 | omap_hsmmc_set_clock(host); |
a45c6cb8 | 1519 | |
a3621465 | 1520 | if (do_send_init_stream) |
a45c6cb8 MC |
1521 | send_init_stream(host); |
1522 | ||
3796fb8a | 1523 | omap_hsmmc_set_bus_mode(host); |
5e2ea617 | 1524 | |
fa4aa2d4 | 1525 | pm_runtime_put_autosuspend(host->dev); |
a45c6cb8 MC |
1526 | } |
1527 | ||
1528 | static int omap_hsmmc_get_cd(struct mmc_host *mmc) | |
1529 | { | |
70a3341a | 1530 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1531 | |
191d1f1d | 1532 | if (!mmc_slot(host).card_detect) |
a45c6cb8 | 1533 | return -ENOSYS; |
db0fefc5 | 1534 | return mmc_slot(host).card_detect(host->dev, host->slot_id); |
a45c6cb8 MC |
1535 | } |
1536 | ||
1537 | static int omap_hsmmc_get_ro(struct mmc_host *mmc) | |
1538 | { | |
70a3341a | 1539 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
a45c6cb8 | 1540 | |
191d1f1d | 1541 | if (!mmc_slot(host).get_ro) |
a45c6cb8 | 1542 | return -ENOSYS; |
191d1f1d | 1543 | return mmc_slot(host).get_ro(host->dev, 0); |
a45c6cb8 MC |
1544 | } |
1545 | ||
4816858c GI |
1546 | static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) |
1547 | { | |
1548 | struct omap_hsmmc_host *host = mmc_priv(mmc); | |
1549 | ||
1550 | if (mmc_slot(host).init_card) | |
1551 | mmc_slot(host).init_card(card); | |
1552 | } | |
1553 | ||
70a3341a | 1554 | static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) |
1b331e69 KK |
1555 | { |
1556 | u32 hctl, capa, value; | |
1557 | ||
1558 | /* Only MMC1 supports 3.0V */ | |
4621d5f8 | 1559 | if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) { |
1b331e69 KK |
1560 | hctl = SDVS30; |
1561 | capa = VS30 | VS18; | |
1562 | } else { | |
1563 | hctl = SDVS18; | |
1564 | capa = VS18; | |
1565 | } | |
1566 | ||
1567 | value = OMAP_HSMMC_READ(host->base, HCTL) & ~SDVS_MASK; | |
1568 | OMAP_HSMMC_WRITE(host->base, HCTL, value | hctl); | |
1569 | ||
1570 | value = OMAP_HSMMC_READ(host->base, CAPA); | |
1571 | OMAP_HSMMC_WRITE(host->base, CAPA, value | capa); | |
1572 | ||
1b331e69 | 1573 | /* Set SD bus power bit */ |
e13bb300 | 1574 | set_sd_bus_power(host); |
1b331e69 KK |
1575 | } |
1576 | ||
70a3341a | 1577 | static int omap_hsmmc_enable_fclk(struct mmc_host *mmc) |
dd498eff | 1578 | { |
70a3341a | 1579 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1580 | |
fa4aa2d4 B |
1581 | pm_runtime_get_sync(host->dev); |
1582 | ||
dd498eff DK |
1583 | return 0; |
1584 | } | |
1585 | ||
907d2e7c | 1586 | static int omap_hsmmc_disable_fclk(struct mmc_host *mmc) |
dd498eff | 1587 | { |
70a3341a | 1588 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
dd498eff | 1589 | |
fa4aa2d4 B |
1590 | pm_runtime_mark_last_busy(host->dev); |
1591 | pm_runtime_put_autosuspend(host->dev); | |
1592 | ||
dd498eff DK |
1593 | return 0; |
1594 | } | |
1595 | ||
70a3341a DK |
1596 | static const struct mmc_host_ops omap_hsmmc_ops = { |
1597 | .enable = omap_hsmmc_enable_fclk, | |
1598 | .disable = omap_hsmmc_disable_fclk, | |
9782aff8 PF |
1599 | .post_req = omap_hsmmc_post_req, |
1600 | .pre_req = omap_hsmmc_pre_req, | |
70a3341a DK |
1601 | .request = omap_hsmmc_request, |
1602 | .set_ios = omap_hsmmc_set_ios, | |
dd498eff DK |
1603 | .get_cd = omap_hsmmc_get_cd, |
1604 | .get_ro = omap_hsmmc_get_ro, | |
4816858c | 1605 | .init_card = omap_hsmmc_init_card, |
dd498eff DK |
1606 | /* NYET -- enable_sdio_irq */ |
1607 | }; | |
1608 | ||
d900f712 DK |
1609 | #ifdef CONFIG_DEBUG_FS |
1610 | ||
70a3341a | 1611 | static int omap_hsmmc_regs_show(struct seq_file *s, void *data) |
d900f712 DK |
1612 | { |
1613 | struct mmc_host *mmc = s->private; | |
70a3341a | 1614 | struct omap_hsmmc_host *host = mmc_priv(mmc); |
11dd62a7 DK |
1615 | int context_loss = 0; |
1616 | ||
70a3341a DK |
1617 | if (host->pdata->get_context_loss_count) |
1618 | context_loss = host->pdata->get_context_loss_count(host->dev); | |
d900f712 | 1619 | |
907d2e7c AH |
1620 | seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n", |
1621 | mmc->index, host->context_loss, context_loss); | |
5e2ea617 | 1622 | |
7a8c2cef | 1623 | if (host->suspended) { |
dd498eff DK |
1624 | seq_printf(s, "host suspended, can't read registers\n"); |
1625 | return 0; | |
1626 | } | |
1627 | ||
fa4aa2d4 | 1628 | pm_runtime_get_sync(host->dev); |
d900f712 | 1629 | |
d900f712 DK |
1630 | seq_printf(s, "CON:\t\t0x%08x\n", |
1631 | OMAP_HSMMC_READ(host->base, CON)); | |
1632 | seq_printf(s, "HCTL:\t\t0x%08x\n", | |
1633 | OMAP_HSMMC_READ(host->base, HCTL)); | |
1634 | seq_printf(s, "SYSCTL:\t\t0x%08x\n", | |
1635 | OMAP_HSMMC_READ(host->base, SYSCTL)); | |
1636 | seq_printf(s, "IE:\t\t0x%08x\n", | |
1637 | OMAP_HSMMC_READ(host->base, IE)); | |
1638 | seq_printf(s, "ISE:\t\t0x%08x\n", | |
1639 | OMAP_HSMMC_READ(host->base, ISE)); | |
1640 | seq_printf(s, "CAPA:\t\t0x%08x\n", | |
1641 | OMAP_HSMMC_READ(host->base, CAPA)); | |
5e2ea617 | 1642 | |
fa4aa2d4 B |
1643 | pm_runtime_mark_last_busy(host->dev); |
1644 | pm_runtime_put_autosuspend(host->dev); | |
dd498eff | 1645 | |
d900f712 DK |
1646 | return 0; |
1647 | } | |
1648 | ||
70a3341a | 1649 | static int omap_hsmmc_regs_open(struct inode *inode, struct file *file) |
d900f712 | 1650 | { |
70a3341a | 1651 | return single_open(file, omap_hsmmc_regs_show, inode->i_private); |
d900f712 DK |
1652 | } |
1653 | ||
1654 | static const struct file_operations mmc_regs_fops = { | |
70a3341a | 1655 | .open = omap_hsmmc_regs_open, |
d900f712 DK |
1656 | .read = seq_read, |
1657 | .llseek = seq_lseek, | |
1658 | .release = single_release, | |
1659 | }; | |
1660 | ||
70a3341a | 1661 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1662 | { |
1663 | if (mmc->debugfs_root) | |
1664 | debugfs_create_file("regs", S_IRUSR, mmc->debugfs_root, | |
1665 | mmc, &mmc_regs_fops); | |
1666 | } | |
1667 | ||
1668 | #else | |
1669 | ||
70a3341a | 1670 | static void omap_hsmmc_debugfs(struct mmc_host *mmc) |
d900f712 DK |
1671 | { |
1672 | } | |
1673 | ||
1674 | #endif | |
1675 | ||
46856a68 RN |
1676 | #ifdef CONFIG_OF |
1677 | static u16 omap4_reg_offset = 0x100; | |
1678 | ||
1679 | static const struct of_device_id omap_mmc_of_match[] = { | |
1680 | { | |
1681 | .compatible = "ti,omap2-hsmmc", | |
1682 | }, | |
1683 | { | |
1684 | .compatible = "ti,omap3-hsmmc", | |
1685 | }, | |
1686 | { | |
1687 | .compatible = "ti,omap4-hsmmc", | |
1688 | .data = &omap4_reg_offset, | |
1689 | }, | |
1690 | {}, | |
b6d085f6 | 1691 | }; |
46856a68 RN |
1692 | MODULE_DEVICE_TABLE(of, omap_mmc_of_match); |
1693 | ||
1694 | static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) | |
1695 | { | |
1696 | struct omap_mmc_platform_data *pdata; | |
1697 | struct device_node *np = dev->of_node; | |
1698 | u32 bus_width; | |
1699 | ||
1700 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
1701 | if (!pdata) | |
1702 | return NULL; /* out of memory */ | |
1703 | ||
1704 | if (of_find_property(np, "ti,dual-volt", NULL)) | |
1705 | pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT; | |
1706 | ||
1707 | /* This driver only supports 1 slot */ | |
1708 | pdata->nr_slots = 1; | |
1709 | pdata->slots[0].switch_pin = of_get_named_gpio(np, "cd-gpios", 0); | |
1710 | pdata->slots[0].gpio_wp = of_get_named_gpio(np, "wp-gpios", 0); | |
1711 | ||
1712 | if (of_find_property(np, "ti,non-removable", NULL)) { | |
1713 | pdata->slots[0].nonremovable = true; | |
1714 | pdata->slots[0].no_regulator_off_init = true; | |
1715 | } | |
7f217794 | 1716 | of_property_read_u32(np, "bus-width", &bus_width); |
46856a68 RN |
1717 | if (bus_width == 4) |
1718 | pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA; | |
1719 | else if (bus_width == 8) | |
1720 | pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA; | |
1721 | ||
1722 | if (of_find_property(np, "ti,needs-special-reset", NULL)) | |
1723 | pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET; | |
1724 | ||
1725 | return pdata; | |
1726 | } | |
1727 | #else | |
1728 | static inline struct omap_mmc_platform_data | |
1729 | *of_get_hsmmc_pdata(struct device *dev) | |
1730 | { | |
1731 | return NULL; | |
1732 | } | |
1733 | #endif | |
1734 | ||
efa25fd3 | 1735 | static int __devinit omap_hsmmc_probe(struct platform_device *pdev) |
a45c6cb8 MC |
1736 | { |
1737 | struct omap_mmc_platform_data *pdata = pdev->dev.platform_data; | |
1738 | struct mmc_host *mmc; | |
70a3341a | 1739 | struct omap_hsmmc_host *host = NULL; |
a45c6cb8 | 1740 | struct resource *res; |
db0fefc5 | 1741 | int ret, irq; |
46856a68 | 1742 | const struct of_device_id *match; |
26b88520 RK |
1743 | dma_cap_mask_t mask; |
1744 | unsigned tx_req, rx_req; | |
46856a68 RN |
1745 | |
1746 | match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); | |
1747 | if (match) { | |
1748 | pdata = of_get_hsmmc_pdata(&pdev->dev); | |
1749 | if (match->data) { | |
1750 | u16 *offsetp = match->data; | |
1751 | pdata->reg_offset = *offsetp; | |
1752 | } | |
1753 | } | |
a45c6cb8 MC |
1754 | |
1755 | if (pdata == NULL) { | |
1756 | dev_err(&pdev->dev, "Platform Data is missing\n"); | |
1757 | return -ENXIO; | |
1758 | } | |
1759 | ||
1760 | if (pdata->nr_slots == 0) { | |
1761 | dev_err(&pdev->dev, "No Slots\n"); | |
1762 | return -ENXIO; | |
1763 | } | |
1764 | ||
1765 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1766 | irq = platform_get_irq(pdev, 0); | |
1767 | if (res == NULL || irq < 0) | |
1768 | return -ENXIO; | |
1769 | ||
984b203a | 1770 | res = request_mem_region(res->start, resource_size(res), pdev->name); |
a45c6cb8 MC |
1771 | if (res == NULL) |
1772 | return -EBUSY; | |
1773 | ||
db0fefc5 AH |
1774 | ret = omap_hsmmc_gpio_init(pdata); |
1775 | if (ret) | |
1776 | goto err; | |
1777 | ||
70a3341a | 1778 | mmc = mmc_alloc_host(sizeof(struct omap_hsmmc_host), &pdev->dev); |
a45c6cb8 MC |
1779 | if (!mmc) { |
1780 | ret = -ENOMEM; | |
db0fefc5 | 1781 | goto err_alloc; |
a45c6cb8 MC |
1782 | } |
1783 | ||
1784 | host = mmc_priv(mmc); | |
1785 | host->mmc = mmc; | |
1786 | host->pdata = pdata; | |
1787 | host->dev = &pdev->dev; | |
1788 | host->use_dma = 1; | |
a45c6cb8 MC |
1789 | host->dma_ch = -1; |
1790 | host->irq = irq; | |
a45c6cb8 | 1791 | host->slot_id = 0; |
fc307df8 | 1792 | host->mapbase = res->start + pdata->reg_offset; |
a45c6cb8 | 1793 | host->base = ioremap(host->mapbase, SZ_4K); |
6da20c89 | 1794 | host->power_mode = MMC_POWER_OFF; |
9782aff8 | 1795 | host->next_data.cookie = 1; |
a45c6cb8 MC |
1796 | |
1797 | platform_set_drvdata(pdev, host); | |
a45c6cb8 | 1798 | |
7a8c2cef | 1799 | mmc->ops = &omap_hsmmc_ops; |
dd498eff | 1800 | |
e0eb2424 AH |
1801 | /* |
1802 | * If regulator_disable can only put vcc_aux to sleep then there is | |
1803 | * no off state. | |
1804 | */ | |
1805 | if (mmc_slot(host).vcc_aux_disable_is_sleep) | |
1806 | mmc_slot(host).no_off = 1; | |
1807 | ||
d418ed87 DM |
1808 | mmc->f_min = OMAP_MMC_MIN_CLOCK; |
1809 | ||
1810 | if (pdata->max_freq > 0) | |
1811 | mmc->f_max = pdata->max_freq; | |
1812 | else | |
1813 | mmc->f_max = OMAP_MMC_MAX_CLOCK; | |
a45c6cb8 | 1814 | |
4dffd7a2 | 1815 | spin_lock_init(&host->irq_lock); |
a45c6cb8 | 1816 | |
6f7607cc | 1817 | host->fclk = clk_get(&pdev->dev, "fck"); |
a45c6cb8 MC |
1818 | if (IS_ERR(host->fclk)) { |
1819 | ret = PTR_ERR(host->fclk); | |
1820 | host->fclk = NULL; | |
a45c6cb8 MC |
1821 | goto err1; |
1822 | } | |
1823 | ||
9b68256c PW |
1824 | if (host->pdata->controller_flags & OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) { |
1825 | dev_info(&pdev->dev, "multiblock reads disabled due to 35xx erratum 2.1.1.128; MMC read performance may suffer\n"); | |
1826 | mmc->caps2 |= MMC_CAP2_NO_MULTI_READ; | |
1827 | } | |
dd498eff | 1828 | |
fa4aa2d4 B |
1829 | pm_runtime_enable(host->dev); |
1830 | pm_runtime_get_sync(host->dev); | |
1831 | pm_runtime_set_autosuspend_delay(host->dev, MMC_AUTOSUSPEND_DELAY); | |
1832 | pm_runtime_use_autosuspend(host->dev); | |
a45c6cb8 | 1833 | |
92a3aebf B |
1834 | omap_hsmmc_context_save(host); |
1835 | ||
cd03d9a8 RN |
1836 | host->dbclk = clk_get(&pdev->dev, "mmchsdb_fck"); |
1837 | /* | |
1838 | * MMC can still work without debounce clock. | |
1839 | */ | |
1840 | if (IS_ERR(host->dbclk)) { | |
1841 | dev_warn(mmc_dev(host->mmc), "Failed to get debounce clk\n"); | |
1842 | host->dbclk = NULL; | |
94c18149 | 1843 | } else if (clk_prepare_enable(host->dbclk) != 0) { |
cd03d9a8 RN |
1844 | dev_warn(mmc_dev(host->mmc), "Failed to enable debounce clk\n"); |
1845 | clk_put(host->dbclk); | |
1846 | host->dbclk = NULL; | |
2bec0893 | 1847 | } |
a45c6cb8 | 1848 | |
0ccd76d4 JY |
1849 | /* Since we do only SG emulation, we can have as many segs |
1850 | * as we want. */ | |
a36274e0 | 1851 | mmc->max_segs = 1024; |
0ccd76d4 | 1852 | |
a45c6cb8 MC |
1853 | mmc->max_blk_size = 512; /* Block Length at max can be 1024 */ |
1854 | mmc->max_blk_count = 0xFFFF; /* No. of Blocks is 16 bits */ | |
1855 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
1856 | mmc->max_seg_size = mmc->max_req_size; | |
1857 | ||
13189e78 | 1858 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED | |
93caf8e6 | 1859 | MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_ERASE; |
a45c6cb8 | 1860 | |
3a63833e SG |
1861 | mmc->caps |= mmc_slot(host).caps; |
1862 | if (mmc->caps & MMC_CAP_8_BIT_DATA) | |
a45c6cb8 MC |
1863 | mmc->caps |= MMC_CAP_4_BIT_DATA; |
1864 | ||
191d1f1d | 1865 | if (mmc_slot(host).nonremovable) |
23d99bb9 AH |
1866 | mmc->caps |= MMC_CAP_NONREMOVABLE; |
1867 | ||
6fdc75de EP |
1868 | mmc->pm_caps = mmc_slot(host).pm_caps; |
1869 | ||
70a3341a | 1870 | omap_hsmmc_conf_bus_power(host); |
a45c6cb8 | 1871 | |
b7bf773b B |
1872 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); |
1873 | if (!res) { | |
1874 | dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); | |
9c17d08c | 1875 | ret = -ENXIO; |
b7bf773b B |
1876 | goto err_irq; |
1877 | } | |
26b88520 | 1878 | tx_req = res->start; |
b7bf773b B |
1879 | |
1880 | res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); | |
1881 | if (!res) { | |
1882 | dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); | |
9c17d08c | 1883 | ret = -ENXIO; |
f3e2f1dd GI |
1884 | goto err_irq; |
1885 | } | |
26b88520 | 1886 | rx_req = res->start; |
a45c6cb8 | 1887 | |
26b88520 RK |
1888 | dma_cap_zero(mask); |
1889 | dma_cap_set(DMA_SLAVE, mask); | |
1890 | ||
1891 | host->rx_chan = dma_request_channel(mask, omap_dma_filter_fn, &rx_req); | |
1892 | if (!host->rx_chan) { | |
1893 | dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req); | |
04e8c7bc | 1894 | ret = -ENXIO; |
26b88520 RK |
1895 | goto err_irq; |
1896 | } | |
1897 | ||
1898 | host->tx_chan = dma_request_channel(mask, omap_dma_filter_fn, &tx_req); | |
1899 | if (!host->tx_chan) { | |
1900 | dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req); | |
04e8c7bc | 1901 | ret = -ENXIO; |
26b88520 | 1902 | goto err_irq; |
c5c98927 | 1903 | } |
a45c6cb8 MC |
1904 | |
1905 | /* Request IRQ for MMC operations */ | |
d9618e9f | 1906 | ret = request_irq(host->irq, omap_hsmmc_irq, 0, |
a45c6cb8 MC |
1907 | mmc_hostname(mmc), host); |
1908 | if (ret) { | |
1909 | dev_dbg(mmc_dev(host->mmc), "Unable to grab HSMMC IRQ\n"); | |
1910 | goto err_irq; | |
1911 | } | |
1912 | ||
1913 | if (pdata->init != NULL) { | |
1914 | if (pdata->init(&pdev->dev) != 0) { | |
70a3341a DK |
1915 | dev_dbg(mmc_dev(host->mmc), |
1916 | "Unable to configure MMC IRQs\n"); | |
a45c6cb8 MC |
1917 | goto err_irq_cd_init; |
1918 | } | |
1919 | } | |
db0fefc5 | 1920 | |
b702b106 | 1921 | if (omap_hsmmc_have_reg() && !mmc_slot(host).set_power) { |
db0fefc5 AH |
1922 | ret = omap_hsmmc_reg_get(host); |
1923 | if (ret) | |
1924 | goto err_reg; | |
1925 | host->use_reg = 1; | |
1926 | } | |
1927 | ||
b583f26d | 1928 | mmc->ocr_avail = mmc_slot(host).ocr_mask; |
a45c6cb8 MC |
1929 | |
1930 | /* Request IRQ for card detect */ | |
e1a55f5e | 1931 | if ((mmc_slot(host).card_detect_irq)) { |
7efab4f3 N |
1932 | ret = request_threaded_irq(mmc_slot(host).card_detect_irq, |
1933 | NULL, | |
1934 | omap_hsmmc_detect, | |
db35f83e | 1935 | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
7efab4f3 | 1936 | mmc_hostname(mmc), host); |
a45c6cb8 MC |
1937 | if (ret) { |
1938 | dev_dbg(mmc_dev(host->mmc), | |
1939 | "Unable to grab MMC CD IRQ\n"); | |
1940 | goto err_irq_cd; | |
1941 | } | |
72f2e2c7 | 1942 | pdata->suspend = omap_hsmmc_suspend_cdirq; |
1943 | pdata->resume = omap_hsmmc_resume_cdirq; | |
a45c6cb8 MC |
1944 | } |
1945 | ||
b417577d | 1946 | omap_hsmmc_disable_irq(host); |
a45c6cb8 | 1947 | |
b62f6228 AH |
1948 | omap_hsmmc_protect_card(host); |
1949 | ||
a45c6cb8 MC |
1950 | mmc_add_host(mmc); |
1951 | ||
191d1f1d | 1952 | if (mmc_slot(host).name != NULL) { |
a45c6cb8 MC |
1953 | ret = device_create_file(&mmc->class_dev, &dev_attr_slot_name); |
1954 | if (ret < 0) | |
1955 | goto err_slot_name; | |
1956 | } | |
191d1f1d | 1957 | if (mmc_slot(host).card_detect_irq && mmc_slot(host).get_cover_state) { |
a45c6cb8 MC |
1958 | ret = device_create_file(&mmc->class_dev, |
1959 | &dev_attr_cover_switch); | |
1960 | if (ret < 0) | |
db0fefc5 | 1961 | goto err_slot_name; |
a45c6cb8 MC |
1962 | } |
1963 | ||
70a3341a | 1964 | omap_hsmmc_debugfs(mmc); |
fa4aa2d4 B |
1965 | pm_runtime_mark_last_busy(host->dev); |
1966 | pm_runtime_put_autosuspend(host->dev); | |
d900f712 | 1967 | |
a45c6cb8 MC |
1968 | return 0; |
1969 | ||
a45c6cb8 MC |
1970 | err_slot_name: |
1971 | mmc_remove_host(mmc); | |
a45c6cb8 | 1972 | free_irq(mmc_slot(host).card_detect_irq, host); |
db0fefc5 AH |
1973 | err_irq_cd: |
1974 | if (host->use_reg) | |
1975 | omap_hsmmc_reg_put(host); | |
1976 | err_reg: | |
1977 | if (host->pdata->cleanup) | |
1978 | host->pdata->cleanup(&pdev->dev); | |
a45c6cb8 MC |
1979 | err_irq_cd_init: |
1980 | free_irq(host->irq, host); | |
1981 | err_irq: | |
c5c98927 RK |
1982 | if (host->tx_chan) |
1983 | dma_release_channel(host->tx_chan); | |
1984 | if (host->rx_chan) | |
1985 | dma_release_channel(host->rx_chan); | |
d59d77ed | 1986 | pm_runtime_put_sync(host->dev); |
37f6190d | 1987 | pm_runtime_disable(host->dev); |
a45c6cb8 | 1988 | clk_put(host->fclk); |
cd03d9a8 | 1989 | if (host->dbclk) { |
94c18149 | 1990 | clk_disable_unprepare(host->dbclk); |
a45c6cb8 MC |
1991 | clk_put(host->dbclk); |
1992 | } | |
a45c6cb8 MC |
1993 | err1: |
1994 | iounmap(host->base); | |
db0fefc5 AH |
1995 | platform_set_drvdata(pdev, NULL); |
1996 | mmc_free_host(mmc); | |
1997 | err_alloc: | |
1998 | omap_hsmmc_gpio_free(pdata); | |
a45c6cb8 | 1999 | err: |
48b332f9 RK |
2000 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2001 | if (res) | |
2002 | release_mem_region(res->start, resource_size(res)); | |
a45c6cb8 MC |
2003 | return ret; |
2004 | } | |
2005 | ||
efa25fd3 | 2006 | static int __devexit omap_hsmmc_remove(struct platform_device *pdev) |
a45c6cb8 | 2007 | { |
70a3341a | 2008 | struct omap_hsmmc_host *host = platform_get_drvdata(pdev); |
a45c6cb8 MC |
2009 | struct resource *res; |
2010 | ||
927ce944 FB |
2011 | pm_runtime_get_sync(host->dev); |
2012 | mmc_remove_host(host->mmc); | |
2013 | if (host->use_reg) | |
2014 | omap_hsmmc_reg_put(host); | |
2015 | if (host->pdata->cleanup) | |
2016 | host->pdata->cleanup(&pdev->dev); | |
2017 | free_irq(host->irq, host); | |
2018 | if (mmc_slot(host).card_detect_irq) | |
2019 | free_irq(mmc_slot(host).card_detect_irq, host); | |
a45c6cb8 | 2020 | |
c5c98927 RK |
2021 | if (host->tx_chan) |
2022 | dma_release_channel(host->tx_chan); | |
2023 | if (host->rx_chan) | |
2024 | dma_release_channel(host->rx_chan); | |
2025 | ||
927ce944 FB |
2026 | pm_runtime_put_sync(host->dev); |
2027 | pm_runtime_disable(host->dev); | |
2028 | clk_put(host->fclk); | |
cd03d9a8 | 2029 | if (host->dbclk) { |
94c18149 | 2030 | clk_disable_unprepare(host->dbclk); |
927ce944 | 2031 | clk_put(host->dbclk); |
a45c6cb8 MC |
2032 | } |
2033 | ||
927ce944 FB |
2034 | mmc_free_host(host->mmc); |
2035 | iounmap(host->base); | |
2036 | omap_hsmmc_gpio_free(pdev->dev.platform_data); | |
2037 | ||
a45c6cb8 MC |
2038 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2039 | if (res) | |
984b203a | 2040 | release_mem_region(res->start, resource_size(res)); |
a45c6cb8 MC |
2041 | platform_set_drvdata(pdev, NULL); |
2042 | ||
2043 | return 0; | |
2044 | } | |
2045 | ||
2046 | #ifdef CONFIG_PM | |
a791daa1 | 2047 | static int omap_hsmmc_suspend(struct device *dev) |
a45c6cb8 MC |
2048 | { |
2049 | int ret = 0; | |
927ce944 | 2050 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
a45c6cb8 | 2051 | |
927ce944 | 2052 | if (!host) |
a45c6cb8 MC |
2053 | return 0; |
2054 | ||
927ce944 FB |
2055 | if (host && host->suspended) |
2056 | return 0; | |
fa4aa2d4 | 2057 | |
927ce944 FB |
2058 | pm_runtime_get_sync(host->dev); |
2059 | host->suspended = 1; | |
2060 | if (host->pdata->suspend) { | |
2061 | ret = host->pdata->suspend(dev, host->slot_id); | |
31f9d463 | 2062 | if (ret) { |
927ce944 FB |
2063 | dev_dbg(dev, "Unable to handle MMC board" |
2064 | " level suspend\n"); | |
a6b2240d | 2065 | host->suspended = 0; |
927ce944 | 2066 | return ret; |
a6b2240d | 2067 | } |
927ce944 FB |
2068 | } |
2069 | ret = mmc_suspend_host(host->mmc); | |
31f9d463 | 2070 | |
927ce944 FB |
2071 | if (ret) { |
2072 | host->suspended = 0; | |
2073 | if (host->pdata->resume) { | |
2074 | ret = host->pdata->resume(dev, host->slot_id); | |
2075 | if (ret) | |
2076 | dev_dbg(dev, "Unmask interrupt failed\n"); | |
31f9d463 | 2077 | } |
927ce944 FB |
2078 | goto err; |
2079 | } | |
31f9d463 | 2080 | |
927ce944 FB |
2081 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) { |
2082 | omap_hsmmc_disable_irq(host); | |
2083 | OMAP_HSMMC_WRITE(host->base, HCTL, | |
2084 | OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); | |
a45c6cb8 | 2085 | } |
927ce944 | 2086 | |
cd03d9a8 | 2087 | if (host->dbclk) |
94c18149 | 2088 | clk_disable_unprepare(host->dbclk); |
31f9d463 EP |
2089 | err: |
2090 | pm_runtime_put_sync(host->dev); | |
a45c6cb8 MC |
2091 | return ret; |
2092 | } | |
2093 | ||
2094 | /* Routine to resume the MMC device */ | |
a791daa1 | 2095 | static int omap_hsmmc_resume(struct device *dev) |
a45c6cb8 MC |
2096 | { |
2097 | int ret = 0; | |
927ce944 FB |
2098 | struct omap_hsmmc_host *host = dev_get_drvdata(dev); |
2099 | ||
2100 | if (!host) | |
2101 | return 0; | |
a45c6cb8 MC |
2102 | |
2103 | if (host && !host->suspended) | |
2104 | return 0; | |
2105 | ||
927ce944 | 2106 | pm_runtime_get_sync(host->dev); |
11dd62a7 | 2107 | |
cd03d9a8 | 2108 | if (host->dbclk) |
94c18149 | 2109 | clk_prepare_enable(host->dbclk); |
2bec0893 | 2110 | |
927ce944 FB |
2111 | if (!(host->mmc->pm_flags & MMC_PM_KEEP_POWER)) |
2112 | omap_hsmmc_conf_bus_power(host); | |
1b331e69 | 2113 | |
927ce944 FB |
2114 | if (host->pdata->resume) { |
2115 | ret = host->pdata->resume(dev, host->slot_id); | |
2116 | if (ret) | |
2117 | dev_dbg(dev, "Unmask interrupt failed\n"); | |
2118 | } | |
a45c6cb8 | 2119 | |
927ce944 | 2120 | omap_hsmmc_protect_card(host); |
b62f6228 | 2121 | |
927ce944 FB |
2122 | /* Notify the core to resume the host */ |
2123 | ret = mmc_resume_host(host->mmc); | |
2124 | if (ret == 0) | |
2125 | host->suspended = 0; | |
fa4aa2d4 | 2126 | |
927ce944 FB |
2127 | pm_runtime_mark_last_busy(host->dev); |
2128 | pm_runtime_put_autosuspend(host->dev); | |
a45c6cb8 MC |
2129 | |
2130 | return ret; | |
2131 | ||
a45c6cb8 MC |
2132 | } |
2133 | ||
2134 | #else | |
70a3341a DK |
2135 | #define omap_hsmmc_suspend NULL |
2136 | #define omap_hsmmc_resume NULL | |
a45c6cb8 MC |
2137 | #endif |
2138 | ||
fa4aa2d4 B |
2139 | static int omap_hsmmc_runtime_suspend(struct device *dev) |
2140 | { | |
2141 | struct omap_hsmmc_host *host; | |
2142 | ||
2143 | host = platform_get_drvdata(to_platform_device(dev)); | |
2144 | omap_hsmmc_context_save(host); | |
927ce944 | 2145 | dev_dbg(dev, "disabled\n"); |
fa4aa2d4 B |
2146 | |
2147 | return 0; | |
2148 | } | |
2149 | ||
2150 | static int omap_hsmmc_runtime_resume(struct device *dev) | |
2151 | { | |
2152 | struct omap_hsmmc_host *host; | |
2153 | ||
2154 | host = platform_get_drvdata(to_platform_device(dev)); | |
2155 | omap_hsmmc_context_restore(host); | |
927ce944 | 2156 | dev_dbg(dev, "enabled\n"); |
fa4aa2d4 B |
2157 | |
2158 | return 0; | |
2159 | } | |
2160 | ||
a791daa1 | 2161 | static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { |
70a3341a DK |
2162 | .suspend = omap_hsmmc_suspend, |
2163 | .resume = omap_hsmmc_resume, | |
fa4aa2d4 B |
2164 | .runtime_suspend = omap_hsmmc_runtime_suspend, |
2165 | .runtime_resume = omap_hsmmc_runtime_resume, | |
a791daa1 KH |
2166 | }; |
2167 | ||
2168 | static struct platform_driver omap_hsmmc_driver = { | |
efa25fd3 FB |
2169 | .probe = omap_hsmmc_probe, |
2170 | .remove = __devexit_p(omap_hsmmc_remove), | |
a45c6cb8 MC |
2171 | .driver = { |
2172 | .name = DRIVER_NAME, | |
2173 | .owner = THIS_MODULE, | |
a791daa1 | 2174 | .pm = &omap_hsmmc_dev_pm_ops, |
46856a68 | 2175 | .of_match_table = of_match_ptr(omap_mmc_of_match), |
a45c6cb8 MC |
2176 | }, |
2177 | }; | |
2178 | ||
b796450b | 2179 | module_platform_driver(omap_hsmmc_driver); |
a45c6cb8 MC |
2180 | MODULE_DESCRIPTION("OMAP High Speed Multimedia Card driver"); |
2181 | MODULE_LICENSE("GPL"); | |
2182 | MODULE_ALIAS("platform:" DRIVER_NAME); | |
2183 | MODULE_AUTHOR("Texas Instruments Inc"); |