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d96be879 SH |
1 | /* |
2 | * linux/drivers/mmc/host/mxcmmc.c - Freescale i.MX MMCI driver | |
3 | * | |
4 | * This is a driver for the SDHC controller found in Freescale MX2/MX3 | |
5 | * SoCs. It is basically the same hardware as found on MX1 (imxmmc.c). | |
6 | * Unlike the hardware found on MX1, this hardware just works and does | |
3ad2f3fb | 7 | * not need all the quirks found in imxmmc.c, hence the separate driver. |
d96be879 SH |
8 | * |
9 | * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> | |
10 | * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com> | |
11 | * | |
12 | * derived from pxamci.c by Russell King | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/irq.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/dma-mapping.h> | |
28 | #include <linux/mmc/host.h> | |
29 | #include <linux/mmc/card.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/clk.h> | |
32 | #include <linux/io.h> | |
33 | #include <linux/gpio.h> | |
74b66954 | 34 | #include <linux/regulator/consumer.h> |
f53fbde4 | 35 | #include <linux/dmaengine.h> |
258aea76 | 36 | #include <linux/types.h> |
d96be879 SH |
37 | |
38 | #include <asm/dma.h> | |
39 | #include <asm/irq.h> | |
40 | #include <asm/sizes.h> | |
41 | #include <mach/mmc.h> | |
42 | ||
f53fbde4 | 43 | #include <mach/dma.h> |
edae8998 | 44 | #include <mach/hardware.h> |
d96be879 | 45 | |
9563b1db | 46 | #define DRIVER_NAME "mxc-mmc" |
d96be879 SH |
47 | |
48 | #define MMC_REG_STR_STP_CLK 0x00 | |
49 | #define MMC_REG_STATUS 0x04 | |
50 | #define MMC_REG_CLK_RATE 0x08 | |
51 | #define MMC_REG_CMD_DAT_CONT 0x0C | |
52 | #define MMC_REG_RES_TO 0x10 | |
53 | #define MMC_REG_READ_TO 0x14 | |
54 | #define MMC_REG_BLK_LEN 0x18 | |
55 | #define MMC_REG_NOB 0x1C | |
56 | #define MMC_REG_REV_NO 0x20 | |
57 | #define MMC_REG_INT_CNTR 0x24 | |
58 | #define MMC_REG_CMD 0x28 | |
59 | #define MMC_REG_ARG 0x2C | |
60 | #define MMC_REG_RES_FIFO 0x34 | |
61 | #define MMC_REG_BUFFER_ACCESS 0x38 | |
62 | ||
63 | #define STR_STP_CLK_RESET (1 << 3) | |
64 | #define STR_STP_CLK_START_CLK (1 << 1) | |
65 | #define STR_STP_CLK_STOP_CLK (1 << 0) | |
66 | ||
67 | #define STATUS_CARD_INSERTION (1 << 31) | |
68 | #define STATUS_CARD_REMOVAL (1 << 30) | |
69 | #define STATUS_YBUF_EMPTY (1 << 29) | |
70 | #define STATUS_XBUF_EMPTY (1 << 28) | |
71 | #define STATUS_YBUF_FULL (1 << 27) | |
72 | #define STATUS_XBUF_FULL (1 << 26) | |
73 | #define STATUS_BUF_UND_RUN (1 << 25) | |
74 | #define STATUS_BUF_OVFL (1 << 24) | |
75 | #define STATUS_SDIO_INT_ACTIVE (1 << 14) | |
76 | #define STATUS_END_CMD_RESP (1 << 13) | |
77 | #define STATUS_WRITE_OP_DONE (1 << 12) | |
78 | #define STATUS_DATA_TRANS_DONE (1 << 11) | |
79 | #define STATUS_READ_OP_DONE (1 << 11) | |
80 | #define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10) | |
81 | #define STATUS_CARD_BUS_CLK_RUN (1 << 8) | |
82 | #define STATUS_BUF_READ_RDY (1 << 7) | |
83 | #define STATUS_BUF_WRITE_RDY (1 << 6) | |
84 | #define STATUS_RESP_CRC_ERR (1 << 5) | |
85 | #define STATUS_CRC_READ_ERR (1 << 3) | |
86 | #define STATUS_CRC_WRITE_ERR (1 << 2) | |
87 | #define STATUS_TIME_OUT_RESP (1 << 1) | |
88 | #define STATUS_TIME_OUT_READ (1 << 0) | |
89 | #define STATUS_ERR_MASK 0x2f | |
90 | ||
91 | #define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12) | |
92 | #define CMD_DAT_CONT_STOP_READWAIT (1 << 11) | |
93 | #define CMD_DAT_CONT_START_READWAIT (1 << 10) | |
94 | #define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8) | |
95 | #define CMD_DAT_CONT_INIT (1 << 7) | |
96 | #define CMD_DAT_CONT_WRITE (1 << 4) | |
97 | #define CMD_DAT_CONT_DATA_ENABLE (1 << 3) | |
98 | #define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0) | |
99 | #define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0) | |
100 | #define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0) | |
101 | ||
102 | #define INT_SDIO_INT_WKP_EN (1 << 18) | |
103 | #define INT_CARD_INSERTION_WKP_EN (1 << 17) | |
104 | #define INT_CARD_REMOVAL_WKP_EN (1 << 16) | |
105 | #define INT_CARD_INSERTION_EN (1 << 15) | |
106 | #define INT_CARD_REMOVAL_EN (1 << 14) | |
107 | #define INT_SDIO_IRQ_EN (1 << 13) | |
108 | #define INT_DAT0_EN (1 << 12) | |
109 | #define INT_BUF_READ_EN (1 << 4) | |
110 | #define INT_BUF_WRITE_EN (1 << 3) | |
111 | #define INT_END_CMD_RES_EN (1 << 2) | |
112 | #define INT_WRITE_OP_DONE_EN (1 << 1) | |
113 | #define INT_READ_OP_EN (1 << 0) | |
114 | ||
115 | struct mxcmci_host { | |
116 | struct mmc_host *mmc; | |
117 | struct resource *res; | |
118 | void __iomem *base; | |
119 | int irq; | |
120 | int detect_irq; | |
f53fbde4 SH |
121 | struct dma_chan *dma; |
122 | struct dma_async_tx_descriptor *desc; | |
d96be879 | 123 | int do_dma; |
16b3bf8c | 124 | int default_irq_mask; |
f441b993 | 125 | int use_sdio; |
d96be879 SH |
126 | unsigned int power_mode; |
127 | struct imxmmc_platform_data *pdata; | |
128 | ||
129 | struct mmc_request *req; | |
130 | struct mmc_command *cmd; | |
131 | struct mmc_data *data; | |
132 | ||
d96be879 SH |
133 | unsigned int datasize; |
134 | unsigned int dma_dir; | |
135 | ||
136 | u16 rev_no; | |
137 | unsigned int cmdat; | |
138 | ||
529aa29e SH |
139 | struct clk *clk_ipg; |
140 | struct clk *clk_per; | |
d96be879 SH |
141 | |
142 | int clock; | |
143 | ||
144 | struct work_struct datawork; | |
f441b993 | 145 | spinlock_t lock; |
74b66954 AP |
146 | |
147 | struct regulator *vcc; | |
f53fbde4 SH |
148 | |
149 | int burstlen; | |
150 | int dmareq; | |
151 | struct dma_slave_config dma_slave_config; | |
152 | struct imx_dma_data dma_data; | |
d96be879 SH |
153 | }; |
154 | ||
18489fa2 MF |
155 | static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); |
156 | ||
74b66954 AP |
157 | static inline void mxcmci_init_ocr(struct mxcmci_host *host) |
158 | { | |
74b66954 AP |
159 | host->vcc = regulator_get(mmc_dev(host->mmc), "vmmc"); |
160 | ||
161 | if (IS_ERR(host->vcc)) { | |
162 | host->vcc = NULL; | |
163 | } else { | |
164 | host->mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vcc); | |
165 | if (host->pdata && host->pdata->ocr_avail) | |
166 | dev_warn(mmc_dev(host->mmc), | |
167 | "pdata->ocr_avail will not be used\n"); | |
168 | } | |
d078d242 | 169 | |
74b66954 AP |
170 | if (host->vcc == NULL) { |
171 | /* fall-back to platform data */ | |
172 | if (host->pdata && host->pdata->ocr_avail) | |
173 | host->mmc->ocr_avail = host->pdata->ocr_avail; | |
174 | else | |
175 | host->mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
176 | } | |
177 | } | |
178 | ||
d078d242 AP |
179 | static inline void mxcmci_set_power(struct mxcmci_host *host, |
180 | unsigned char power_mode, | |
181 | unsigned int vdd) | |
74b66954 | 182 | { |
d078d242 AP |
183 | if (host->vcc) { |
184 | if (power_mode == MMC_POWER_UP) | |
185 | mmc_regulator_set_ocr(host->mmc, host->vcc, vdd); | |
186 | else if (power_mode == MMC_POWER_OFF) | |
187 | mmc_regulator_set_ocr(host->mmc, host->vcc, 0); | |
188 | } | |
189 | ||
74b66954 AP |
190 | if (host->pdata && host->pdata->setpower) |
191 | host->pdata->setpower(mmc_dev(host->mmc), vdd); | |
192 | } | |
193 | ||
d96be879 SH |
194 | static inline int mxcmci_use_dma(struct mxcmci_host *host) |
195 | { | |
196 | return host->do_dma; | |
197 | } | |
198 | ||
199 | static void mxcmci_softreset(struct mxcmci_host *host) | |
200 | { | |
201 | int i; | |
202 | ||
4725f6f1 DM |
203 | dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); |
204 | ||
d96be879 SH |
205 | /* reset sequence */ |
206 | writew(STR_STP_CLK_RESET, host->base + MMC_REG_STR_STP_CLK); | |
207 | writew(STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, | |
208 | host->base + MMC_REG_STR_STP_CLK); | |
209 | ||
210 | for (i = 0; i < 8; i++) | |
211 | writew(STR_STP_CLK_START_CLK, host->base + MMC_REG_STR_STP_CLK); | |
212 | ||
213 | writew(0xff, host->base + MMC_REG_RES_TO); | |
214 | } | |
f53fbde4 | 215 | static int mxcmci_setup_dma(struct mmc_host *mmc); |
d96be879 | 216 | |
656217d2 | 217 | static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) |
d96be879 SH |
218 | { |
219 | unsigned int nob = data->blocks; | |
220 | unsigned int blksz = data->blksz; | |
221 | unsigned int datasize = nob * blksz; | |
d96be879 | 222 | struct scatterlist *sg; |
05f5799c | 223 | enum dma_transfer_direction slave_dirn; |
f53fbde4 SH |
224 | int i, nents; |
225 | ||
d96be879 SH |
226 | if (data->flags & MMC_DATA_STREAM) |
227 | nob = 0xffff; | |
228 | ||
229 | host->data = data; | |
230 | data->bytes_xfered = 0; | |
231 | ||
232 | writew(nob, host->base + MMC_REG_NOB); | |
233 | writew(blksz, host->base + MMC_REG_BLK_LEN); | |
234 | host->datasize = datasize; | |
235 | ||
f53fbde4 SH |
236 | if (!mxcmci_use_dma(host)) |
237 | return 0; | |
238 | ||
d96be879 SH |
239 | for_each_sg(data->sg, sg, data->sg_len, i) { |
240 | if (sg->offset & 3 || sg->length & 3) { | |
241 | host->do_dma = 0; | |
656217d2 | 242 | return 0; |
d96be879 SH |
243 | } |
244 | } | |
245 | ||
05f5799c | 246 | if (data->flags & MMC_DATA_READ) { |
d96be879 | 247 | host->dma_dir = DMA_FROM_DEVICE; |
05f5799c VK |
248 | slave_dirn = DMA_DEV_TO_MEM; |
249 | } else { | |
d96be879 | 250 | host->dma_dir = DMA_TO_DEVICE; |
05f5799c VK |
251 | slave_dirn = DMA_MEM_TO_DEV; |
252 | } | |
d96be879 | 253 | |
f53fbde4 SH |
254 | nents = dma_map_sg(host->dma->device->dev, data->sg, |
255 | data->sg_len, host->dma_dir); | |
256 | if (nents != data->sg_len) | |
257 | return -EINVAL; | |
258 | ||
16052827 | 259 | host->desc = dmaengine_prep_slave_sg(host->dma, |
05f5799c | 260 | data->sg, data->sg_len, slave_dirn, |
f53fbde4 | 261 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
d96be879 | 262 | |
f53fbde4 SH |
263 | if (!host->desc) { |
264 | dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, | |
265 | host->dma_dir); | |
266 | host->do_dma = 0; | |
267 | return 0; /* Fall back to PIO */ | |
656217d2 | 268 | } |
d96be879 SH |
269 | wmb(); |
270 | ||
f53fbde4 | 271 | dmaengine_submit(host->desc); |
439aa0ef | 272 | dma_async_issue_pending(host->dma); |
f53fbde4 | 273 | |
656217d2 | 274 | return 0; |
d96be879 SH |
275 | } |
276 | ||
277 | static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, | |
278 | unsigned int cmdat) | |
279 | { | |
16b3bf8c | 280 | u32 int_cntr = host->default_irq_mask; |
f441b993 DM |
281 | unsigned long flags; |
282 | ||
d96be879 SH |
283 | WARN_ON(host->cmd != NULL); |
284 | host->cmd = cmd; | |
285 | ||
286 | switch (mmc_resp_type(cmd)) { | |
287 | case MMC_RSP_R1: /* short CRC, OPCODE */ | |
288 | case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ | |
289 | cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; | |
290 | break; | |
291 | case MMC_RSP_R2: /* long 136 bit + CRC */ | |
292 | cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; | |
293 | break; | |
294 | case MMC_RSP_R3: /* short */ | |
295 | cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; | |
296 | break; | |
297 | case MMC_RSP_NONE: | |
298 | break; | |
299 | default: | |
300 | dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", | |
301 | mmc_resp_type(cmd)); | |
302 | cmd->error = -EINVAL; | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
f441b993 DM |
306 | int_cntr = INT_END_CMD_RES_EN; |
307 | ||
d96be879 | 308 | if (mxcmci_use_dma(host)) |
f441b993 DM |
309 | int_cntr |= INT_READ_OP_EN | INT_WRITE_OP_DONE_EN; |
310 | ||
311 | spin_lock_irqsave(&host->lock, flags); | |
312 | if (host->use_sdio) | |
313 | int_cntr |= INT_SDIO_IRQ_EN; | |
314 | writel(int_cntr, host->base + MMC_REG_INT_CNTR); | |
315 | spin_unlock_irqrestore(&host->lock, flags); | |
d96be879 SH |
316 | |
317 | writew(cmd->opcode, host->base + MMC_REG_CMD); | |
318 | writel(cmd->arg, host->base + MMC_REG_ARG); | |
319 | writew(cmdat, host->base + MMC_REG_CMD_DAT_CONT); | |
320 | ||
321 | return 0; | |
322 | } | |
323 | ||
324 | static void mxcmci_finish_request(struct mxcmci_host *host, | |
325 | struct mmc_request *req) | |
326 | { | |
16b3bf8c | 327 | u32 int_cntr = host->default_irq_mask; |
f441b993 DM |
328 | unsigned long flags; |
329 | ||
330 | spin_lock_irqsave(&host->lock, flags); | |
331 | if (host->use_sdio) | |
332 | int_cntr |= INT_SDIO_IRQ_EN; | |
333 | writel(int_cntr, host->base + MMC_REG_INT_CNTR); | |
334 | spin_unlock_irqrestore(&host->lock, flags); | |
d96be879 SH |
335 | |
336 | host->req = NULL; | |
337 | host->cmd = NULL; | |
338 | host->data = NULL; | |
339 | ||
340 | mmc_request_done(host->mmc, req); | |
341 | } | |
342 | ||
343 | static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) | |
344 | { | |
345 | struct mmc_data *data = host->data; | |
346 | int data_error; | |
347 | ||
d96be879 | 348 | if (mxcmci_use_dma(host)) { |
f53fbde4 SH |
349 | dmaengine_terminate_all(host->dma); |
350 | dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, | |
d96be879 SH |
351 | host->dma_dir); |
352 | } | |
d96be879 SH |
353 | |
354 | if (stat & STATUS_ERR_MASK) { | |
355 | dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", | |
356 | stat); | |
357 | if (stat & STATUS_CRC_READ_ERR) { | |
4725f6f1 | 358 | dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); |
d96be879 SH |
359 | data->error = -EILSEQ; |
360 | } else if (stat & STATUS_CRC_WRITE_ERR) { | |
361 | u32 err_code = (stat >> 9) & 0x3; | |
4725f6f1 DM |
362 | if (err_code == 2) { /* No CRC response */ |
363 | dev_err(mmc_dev(host->mmc), | |
364 | "%s: No CRC -ETIMEDOUT\n", __func__); | |
d96be879 | 365 | data->error = -ETIMEDOUT; |
4725f6f1 DM |
366 | } else { |
367 | dev_err(mmc_dev(host->mmc), | |
368 | "%s: -EILSEQ\n", __func__); | |
d96be879 | 369 | data->error = -EILSEQ; |
4725f6f1 | 370 | } |
d96be879 | 371 | } else if (stat & STATUS_TIME_OUT_READ) { |
4725f6f1 DM |
372 | dev_err(mmc_dev(host->mmc), |
373 | "%s: read -ETIMEDOUT\n", __func__); | |
d96be879 SH |
374 | data->error = -ETIMEDOUT; |
375 | } else { | |
4725f6f1 | 376 | dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); |
d96be879 SH |
377 | data->error = -EIO; |
378 | } | |
379 | } else { | |
380 | data->bytes_xfered = host->datasize; | |
381 | } | |
382 | ||
383 | data_error = data->error; | |
384 | ||
385 | host->data = NULL; | |
386 | ||
387 | return data_error; | |
388 | } | |
389 | ||
390 | static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) | |
391 | { | |
392 | struct mmc_command *cmd = host->cmd; | |
393 | int i; | |
394 | u32 a, b, c; | |
395 | ||
396 | if (!cmd) | |
397 | return; | |
398 | ||
399 | if (stat & STATUS_TIME_OUT_RESP) { | |
400 | dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); | |
401 | cmd->error = -ETIMEDOUT; | |
402 | } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { | |
403 | dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); | |
404 | cmd->error = -EILSEQ; | |
405 | } | |
406 | ||
407 | if (cmd->flags & MMC_RSP_PRESENT) { | |
408 | if (cmd->flags & MMC_RSP_136) { | |
409 | for (i = 0; i < 4; i++) { | |
410 | a = readw(host->base + MMC_REG_RES_FIFO); | |
411 | b = readw(host->base + MMC_REG_RES_FIFO); | |
412 | cmd->resp[i] = a << 16 | b; | |
413 | } | |
414 | } else { | |
415 | a = readw(host->base + MMC_REG_RES_FIFO); | |
416 | b = readw(host->base + MMC_REG_RES_FIFO); | |
417 | c = readw(host->base + MMC_REG_RES_FIFO); | |
418 | cmd->resp[0] = a << 24 | b << 8 | c >> 8; | |
419 | } | |
420 | } | |
421 | } | |
422 | ||
423 | static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) | |
424 | { | |
425 | u32 stat; | |
426 | unsigned long timeout = jiffies + HZ; | |
427 | ||
428 | do { | |
429 | stat = readl(host->base + MMC_REG_STATUS); | |
430 | if (stat & STATUS_ERR_MASK) | |
431 | return stat; | |
18489fa2 MF |
432 | if (time_after(jiffies, timeout)) { |
433 | mxcmci_softreset(host); | |
434 | mxcmci_set_clk_rate(host, host->clock); | |
d96be879 | 435 | return STATUS_TIME_OUT_READ; |
18489fa2 | 436 | } |
d96be879 SH |
437 | if (stat & mask) |
438 | return 0; | |
439 | cpu_relax(); | |
440 | } while (1); | |
441 | } | |
442 | ||
443 | static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) | |
444 | { | |
445 | unsigned int stat; | |
446 | u32 *buf = _buf; | |
447 | ||
448 | while (bytes > 3) { | |
449 | stat = mxcmci_poll_status(host, | |
450 | STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); | |
451 | if (stat) | |
452 | return stat; | |
453 | *buf++ = readl(host->base + MMC_REG_BUFFER_ACCESS); | |
454 | bytes -= 4; | |
455 | } | |
456 | ||
457 | if (bytes) { | |
458 | u8 *b = (u8 *)buf; | |
459 | u32 tmp; | |
460 | ||
461 | stat = mxcmci_poll_status(host, | |
462 | STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); | |
463 | if (stat) | |
464 | return stat; | |
465 | tmp = readl(host->base + MMC_REG_BUFFER_ACCESS); | |
466 | memcpy(b, &tmp, bytes); | |
467 | } | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) | |
473 | { | |
474 | unsigned int stat; | |
475 | u32 *buf = _buf; | |
476 | ||
477 | while (bytes > 3) { | |
478 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); | |
479 | if (stat) | |
480 | return stat; | |
481 | writel(*buf++, host->base + MMC_REG_BUFFER_ACCESS); | |
482 | bytes -= 4; | |
483 | } | |
484 | ||
485 | if (bytes) { | |
486 | u8 *b = (u8 *)buf; | |
487 | u32 tmp; | |
488 | ||
489 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); | |
490 | if (stat) | |
491 | return stat; | |
492 | ||
493 | memcpy(&tmp, b, bytes); | |
494 | writel(tmp, host->base + MMC_REG_BUFFER_ACCESS); | |
495 | } | |
496 | ||
497 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); | |
498 | if (stat) | |
499 | return stat; | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | static int mxcmci_transfer_data(struct mxcmci_host *host) | |
505 | { | |
506 | struct mmc_data *data = host->req->data; | |
507 | struct scatterlist *sg; | |
508 | int stat, i; | |
509 | ||
d96be879 SH |
510 | host->data = data; |
511 | host->datasize = 0; | |
512 | ||
513 | if (data->flags & MMC_DATA_READ) { | |
514 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
515 | stat = mxcmci_pull(host, sg_virt(sg), sg->length); | |
516 | if (stat) | |
517 | return stat; | |
518 | host->datasize += sg->length; | |
519 | } | |
520 | } else { | |
521 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
522 | stat = mxcmci_push(host, sg_virt(sg), sg->length); | |
523 | if (stat) | |
524 | return stat; | |
525 | host->datasize += sg->length; | |
526 | } | |
527 | stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); | |
528 | if (stat) | |
529 | return stat; | |
530 | } | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static void mxcmci_datawork(struct work_struct *work) | |
535 | { | |
536 | struct mxcmci_host *host = container_of(work, struct mxcmci_host, | |
537 | datawork); | |
538 | int datastat = mxcmci_transfer_data(host); | |
4a31f2ef DM |
539 | |
540 | writel(STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, | |
541 | host->base + MMC_REG_STATUS); | |
d96be879 SH |
542 | mxcmci_finish_data(host, datastat); |
543 | ||
544 | if (host->req->stop) { | |
545 | if (mxcmci_start_cmd(host, host->req->stop, 0)) { | |
546 | mxcmci_finish_request(host, host->req); | |
547 | return; | |
548 | } | |
549 | } else { | |
550 | mxcmci_finish_request(host, host->req); | |
551 | } | |
552 | } | |
553 | ||
d96be879 SH |
554 | static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) |
555 | { | |
556 | struct mmc_data *data = host->data; | |
557 | int data_error; | |
558 | ||
559 | if (!data) | |
560 | return; | |
561 | ||
562 | data_error = mxcmci_finish_data(host, stat); | |
563 | ||
564 | mxcmci_read_response(host, stat); | |
565 | host->cmd = NULL; | |
566 | ||
567 | if (host->req->stop) { | |
568 | if (mxcmci_start_cmd(host, host->req->stop, 0)) { | |
569 | mxcmci_finish_request(host, host->req); | |
570 | return; | |
571 | } | |
572 | } else { | |
573 | mxcmci_finish_request(host, host->req); | |
574 | } | |
575 | } | |
d96be879 SH |
576 | |
577 | static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) | |
578 | { | |
579 | mxcmci_read_response(host, stat); | |
580 | host->cmd = NULL; | |
581 | ||
582 | if (!host->data && host->req) { | |
583 | mxcmci_finish_request(host, host->req); | |
584 | return; | |
585 | } | |
586 | ||
587 | /* For the DMA case the DMA engine handles the data transfer | |
fd589a8f | 588 | * automatically. For non DMA we have to do it ourselves. |
d96be879 SH |
589 | * Don't do it in interrupt context though. |
590 | */ | |
591 | if (!mxcmci_use_dma(host) && host->data) | |
592 | schedule_work(&host->datawork); | |
593 | ||
594 | } | |
595 | ||
596 | static irqreturn_t mxcmci_irq(int irq, void *devid) | |
597 | { | |
598 | struct mxcmci_host *host = devid; | |
f441b993 DM |
599 | unsigned long flags; |
600 | bool sdio_irq; | |
d96be879 SH |
601 | u32 stat; |
602 | ||
603 | stat = readl(host->base + MMC_REG_STATUS); | |
4a31f2ef DM |
604 | writel(stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | |
605 | STATUS_WRITE_OP_DONE), host->base + MMC_REG_STATUS); | |
d96be879 SH |
606 | |
607 | dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); | |
608 | ||
f441b993 DM |
609 | spin_lock_irqsave(&host->lock, flags); |
610 | sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; | |
611 | spin_unlock_irqrestore(&host->lock, flags); | |
612 | ||
4a31f2ef DM |
613 | if (mxcmci_use_dma(host) && |
614 | (stat & (STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE))) | |
615 | writel(STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, | |
616 | host->base + MMC_REG_STATUS); | |
4a31f2ef | 617 | |
f441b993 DM |
618 | if (sdio_irq) { |
619 | writel(STATUS_SDIO_INT_ACTIVE, host->base + MMC_REG_STATUS); | |
620 | mmc_signal_sdio_irq(host->mmc); | |
621 | } | |
622 | ||
d96be879 SH |
623 | if (stat & STATUS_END_CMD_RESP) |
624 | mxcmci_cmd_done(host, stat); | |
f441b993 | 625 | |
d96be879 SH |
626 | if (mxcmci_use_dma(host) && |
627 | (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE))) | |
628 | mxcmci_data_done(host, stat); | |
f53fbde4 | 629 | |
16b3bf8c EB |
630 | if (host->default_irq_mask && |
631 | (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) | |
632 | mmc_detect_change(host->mmc, msecs_to_jiffies(200)); | |
f53fbde4 | 633 | |
d96be879 SH |
634 | return IRQ_HANDLED; |
635 | } | |
636 | ||
637 | static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) | |
638 | { | |
639 | struct mxcmci_host *host = mmc_priv(mmc); | |
640 | unsigned int cmdat = host->cmdat; | |
656217d2 | 641 | int error; |
d96be879 SH |
642 | |
643 | WARN_ON(host->req != NULL); | |
644 | ||
645 | host->req = req; | |
646 | host->cmdat &= ~CMD_DAT_CONT_INIT; | |
f53fbde4 SH |
647 | |
648 | if (host->dma) | |
649 | host->do_dma = 1; | |
650 | ||
d96be879 | 651 | if (req->data) { |
656217d2 MF |
652 | error = mxcmci_setup_data(host, req->data); |
653 | if (error) { | |
654 | req->cmd->error = error; | |
655 | goto out; | |
656 | } | |
657 | ||
d96be879 SH |
658 | |
659 | cmdat |= CMD_DAT_CONT_DATA_ENABLE; | |
660 | ||
661 | if (req->data->flags & MMC_DATA_WRITE) | |
662 | cmdat |= CMD_DAT_CONT_WRITE; | |
663 | } | |
664 | ||
656217d2 | 665 | error = mxcmci_start_cmd(host, req->cmd, cmdat); |
f53fbde4 | 666 | |
656217d2 MF |
667 | out: |
668 | if (error) | |
d96be879 SH |
669 | mxcmci_finish_request(host, req); |
670 | } | |
671 | ||
672 | static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) | |
673 | { | |
674 | unsigned int divider; | |
675 | int prescaler = 0; | |
529aa29e | 676 | unsigned int clk_in = clk_get_rate(host->clk_per); |
d96be879 SH |
677 | |
678 | while (prescaler <= 0x800) { | |
679 | for (divider = 1; divider <= 0xF; divider++) { | |
680 | int x; | |
681 | ||
682 | x = (clk_in / (divider + 1)); | |
683 | ||
684 | if (prescaler) | |
685 | x /= (prescaler * 2); | |
686 | ||
687 | if (x <= clk_ios) | |
688 | break; | |
689 | } | |
690 | if (divider < 0x10) | |
691 | break; | |
692 | ||
693 | if (prescaler == 0) | |
694 | prescaler = 1; | |
695 | else | |
696 | prescaler <<= 1; | |
697 | } | |
698 | ||
699 | writew((prescaler << 4) | divider, host->base + MMC_REG_CLK_RATE); | |
700 | ||
701 | dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", | |
702 | prescaler, divider, clk_in, clk_ios); | |
703 | } | |
704 | ||
f53fbde4 SH |
705 | static int mxcmci_setup_dma(struct mmc_host *mmc) |
706 | { | |
707 | struct mxcmci_host *host = mmc_priv(mmc); | |
708 | struct dma_slave_config *config = &host->dma_slave_config; | |
709 | ||
710 | config->dst_addr = host->res->start + MMC_REG_BUFFER_ACCESS; | |
711 | config->src_addr = host->res->start + MMC_REG_BUFFER_ACCESS; | |
712 | config->dst_addr_width = 4; | |
713 | config->src_addr_width = 4; | |
714 | config->dst_maxburst = host->burstlen; | |
715 | config->src_maxburst = host->burstlen; | |
258aea76 | 716 | config->device_fc = false; |
f53fbde4 SH |
717 | |
718 | return dmaengine_slave_config(host->dma, config); | |
719 | } | |
720 | ||
d96be879 SH |
721 | static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
722 | { | |
723 | struct mxcmci_host *host = mmc_priv(mmc); | |
f53fbde4 SH |
724 | int burstlen, ret; |
725 | ||
d96be879 | 726 | /* |
6584cb88 SH |
727 | * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) |
728 | * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) | |
d96be879 SH |
729 | */ |
730 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
f53fbde4 | 731 | burstlen = 16; |
6584cb88 SH |
732 | else |
733 | burstlen = 4; | |
f53fbde4 SH |
734 | |
735 | if (mxcmci_use_dma(host) && burstlen != host->burstlen) { | |
736 | host->burstlen = burstlen; | |
737 | ret = mxcmci_setup_dma(mmc); | |
738 | if (ret) { | |
739 | dev_err(mmc_dev(host->mmc), | |
740 | "failed to config DMA channel. Falling back to PIO\n"); | |
741 | dma_release_channel(host->dma); | |
742 | host->do_dma = 0; | |
e58f516f | 743 | host->dma = NULL; |
f53fbde4 SH |
744 | } |
745 | } | |
d96be879 | 746 | |
d96be879 SH |
747 | if (ios->bus_width == MMC_BUS_WIDTH_4) |
748 | host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; | |
749 | else | |
750 | host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; | |
751 | ||
752 | if (host->power_mode != ios->power_mode) { | |
d078d242 | 753 | mxcmci_set_power(host, ios->power_mode, ios->vdd); |
d96be879 | 754 | host->power_mode = ios->power_mode; |
74b66954 | 755 | |
d96be879 SH |
756 | if (ios->power_mode == MMC_POWER_ON) |
757 | host->cmdat |= CMD_DAT_CONT_INIT; | |
758 | } | |
759 | ||
760 | if (ios->clock) { | |
761 | mxcmci_set_clk_rate(host, ios->clock); | |
762 | writew(STR_STP_CLK_START_CLK, host->base + MMC_REG_STR_STP_CLK); | |
763 | } else { | |
764 | writew(STR_STP_CLK_STOP_CLK, host->base + MMC_REG_STR_STP_CLK); | |
765 | } | |
766 | ||
767 | host->clock = ios->clock; | |
768 | } | |
769 | ||
770 | static irqreturn_t mxcmci_detect_irq(int irq, void *data) | |
771 | { | |
772 | struct mmc_host *mmc = data; | |
773 | ||
774 | dev_dbg(mmc_dev(mmc), "%s\n", __func__); | |
775 | ||
776 | mmc_detect_change(mmc, msecs_to_jiffies(250)); | |
777 | return IRQ_HANDLED; | |
778 | } | |
779 | ||
780 | static int mxcmci_get_ro(struct mmc_host *mmc) | |
781 | { | |
782 | struct mxcmci_host *host = mmc_priv(mmc); | |
783 | ||
784 | if (host->pdata && host->pdata->get_ro) | |
785 | return !!host->pdata->get_ro(mmc_dev(mmc)); | |
786 | /* | |
787 | * Board doesn't support read only detection; let the mmc core | |
788 | * decide what to do. | |
789 | */ | |
790 | return -ENOSYS; | |
791 | } | |
792 | ||
f441b993 DM |
793 | static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) |
794 | { | |
795 | struct mxcmci_host *host = mmc_priv(mmc); | |
796 | unsigned long flags; | |
797 | u32 int_cntr; | |
798 | ||
799 | spin_lock_irqsave(&host->lock, flags); | |
800 | host->use_sdio = enable; | |
801 | int_cntr = readl(host->base + MMC_REG_INT_CNTR); | |
802 | ||
803 | if (enable) | |
804 | int_cntr |= INT_SDIO_IRQ_EN; | |
805 | else | |
806 | int_cntr &= ~INT_SDIO_IRQ_EN; | |
807 | ||
808 | writel(int_cntr, host->base + MMC_REG_INT_CNTR); | |
809 | spin_unlock_irqrestore(&host->lock, flags); | |
810 | } | |
d96be879 | 811 | |
3fcb027d DM |
812 | static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) |
813 | { | |
814 | /* | |
815 | * MX3 SoCs have a silicon bug which corrupts CRC calculation of | |
816 | * multi-block transfers when connected SDIO peripheral doesn't | |
817 | * drive the BUSY line as required by the specs. | |
818 | * One way to prevent this is to only allow 1-bit transfers. | |
819 | */ | |
820 | ||
821 | if (cpu_is_mx3() && card->type == MMC_TYPE_SDIO) | |
822 | host->caps &= ~MMC_CAP_4_BIT_DATA; | |
823 | else | |
824 | host->caps |= MMC_CAP_4_BIT_DATA; | |
825 | } | |
826 | ||
f53fbde4 SH |
827 | static bool filter(struct dma_chan *chan, void *param) |
828 | { | |
829 | struct mxcmci_host *host = param; | |
830 | ||
831 | if (!imx_dma_is_general_purpose(chan)) | |
832 | return false; | |
833 | ||
834 | chan->private = &host->dma_data; | |
835 | ||
836 | return true; | |
837 | } | |
838 | ||
d96be879 | 839 | static const struct mmc_host_ops mxcmci_ops = { |
f441b993 DM |
840 | .request = mxcmci_request, |
841 | .set_ios = mxcmci_set_ios, | |
842 | .get_ro = mxcmci_get_ro, | |
843 | .enable_sdio_irq = mxcmci_enable_sdio_irq, | |
3fcb027d | 844 | .init_card = mxcmci_init_card, |
d96be879 SH |
845 | }; |
846 | ||
847 | static int mxcmci_probe(struct platform_device *pdev) | |
848 | { | |
849 | struct mmc_host *mmc; | |
850 | struct mxcmci_host *host = NULL; | |
c0521baf | 851 | struct resource *iores, *r; |
d96be879 | 852 | int ret = 0, irq; |
f53fbde4 | 853 | dma_cap_mask_t mask; |
d96be879 | 854 | |
a3c76eb9 | 855 | pr_info("i.MX SDHC driver\n"); |
d96be879 | 856 | |
c0521baf | 857 | iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
d96be879 | 858 | irq = platform_get_irq(pdev, 0); |
c0521baf | 859 | if (!iores || irq < 0) |
d96be879 SH |
860 | return -EINVAL; |
861 | ||
c0521baf | 862 | r = request_mem_region(iores->start, resource_size(iores), pdev->name); |
d96be879 SH |
863 | if (!r) |
864 | return -EBUSY; | |
865 | ||
866 | mmc = mmc_alloc_host(sizeof(struct mxcmci_host), &pdev->dev); | |
867 | if (!mmc) { | |
868 | ret = -ENOMEM; | |
869 | goto out_release_mem; | |
870 | } | |
871 | ||
872 | mmc->ops = &mxcmci_ops; | |
f441b993 | 873 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; |
d96be879 SH |
874 | |
875 | /* MMC core transfer sizes tunable parameters */ | |
a36274e0 | 876 | mmc->max_segs = 64; |
d96be879 SH |
877 | mmc->max_blk_size = 2048; |
878 | mmc->max_blk_count = 65535; | |
879 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
d759c374 | 880 | mmc->max_seg_size = mmc->max_req_size; |
d96be879 SH |
881 | |
882 | host = mmc_priv(mmc); | |
883 | host->base = ioremap(r->start, resource_size(r)); | |
884 | if (!host->base) { | |
885 | ret = -ENOMEM; | |
886 | goto out_free; | |
887 | } | |
888 | ||
889 | host->mmc = mmc; | |
890 | host->pdata = pdev->dev.platform_data; | |
f441b993 | 891 | spin_lock_init(&host->lock); |
d96be879 | 892 | |
74b66954 | 893 | mxcmci_init_ocr(host); |
d96be879 | 894 | |
16b3bf8c EB |
895 | if (host->pdata && host->pdata->dat3_card_detect) |
896 | host->default_irq_mask = | |
897 | INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; | |
898 | else | |
899 | host->default_irq_mask = 0; | |
900 | ||
d96be879 SH |
901 | host->res = r; |
902 | host->irq = irq; | |
903 | ||
529aa29e SH |
904 | host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
905 | if (IS_ERR(host->clk_ipg)) { | |
906 | ret = PTR_ERR(host->clk_ipg); | |
d96be879 SH |
907 | goto out_iounmap; |
908 | } | |
529aa29e SH |
909 | |
910 | host->clk_per = devm_clk_get(&pdev->dev, "per"); | |
911 | if (IS_ERR(host->clk_per)) { | |
912 | ret = PTR_ERR(host->clk_per); | |
913 | goto out_iounmap; | |
914 | } | |
915 | ||
916 | clk_prepare_enable(host->clk_per); | |
917 | clk_prepare_enable(host->clk_ipg); | |
d96be879 SH |
918 | |
919 | mxcmci_softreset(host); | |
920 | ||
921 | host->rev_no = readw(host->base + MMC_REG_REV_NO); | |
922 | if (host->rev_no != 0x400) { | |
923 | ret = -ENODEV; | |
924 | dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", | |
925 | host->rev_no); | |
926 | goto out_clk_put; | |
927 | } | |
928 | ||
529aa29e SH |
929 | mmc->f_min = clk_get_rate(host->clk_per) >> 16; |
930 | mmc->f_max = clk_get_rate(host->clk_per) >> 1; | |
d96be879 SH |
931 | |
932 | /* recommended in data sheet */ | |
933 | writew(0x2db4, host->base + MMC_REG_READ_TO); | |
934 | ||
16b3bf8c | 935 | writel(host->default_irq_mask, host->base + MMC_REG_INT_CNTR); |
d96be879 | 936 | |
d96be879 | 937 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
f53fbde4 SH |
938 | if (r) { |
939 | host->dmareq = r->start; | |
940 | host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; | |
941 | host->dma_data.priority = DMA_PRIO_LOW; | |
942 | host->dma_data.dma_request = host->dmareq; | |
943 | dma_cap_zero(mask); | |
944 | dma_cap_set(DMA_SLAVE, mask); | |
945 | host->dma = dma_request_channel(mask, filter, host); | |
946 | if (host->dma) | |
947 | mmc->max_seg_size = dma_get_max_seg_size( | |
948 | host->dma->device->dev); | |
949 | } | |
950 | ||
951 | if (!host->dma) | |
952 | dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); | |
d96be879 | 953 | |
d96be879 SH |
954 | INIT_WORK(&host->datawork, mxcmci_datawork); |
955 | ||
956 | ret = request_irq(host->irq, mxcmci_irq, 0, DRIVER_NAME, host); | |
957 | if (ret) | |
958 | goto out_free_dma; | |
959 | ||
960 | platform_set_drvdata(pdev, mmc); | |
961 | ||
962 | if (host->pdata && host->pdata->init) { | |
963 | ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, | |
964 | host->mmc); | |
965 | if (ret) | |
966 | goto out_free_irq; | |
967 | } | |
968 | ||
969 | mmc_add_host(mmc); | |
970 | ||
971 | return 0; | |
972 | ||
973 | out_free_irq: | |
974 | free_irq(host->irq, host); | |
975 | out_free_dma: | |
f53fbde4 SH |
976 | if (host->dma) |
977 | dma_release_channel(host->dma); | |
d96be879 | 978 | out_clk_put: |
529aa29e SH |
979 | clk_disable_unprepare(host->clk_per); |
980 | clk_disable_unprepare(host->clk_ipg); | |
d96be879 SH |
981 | out_iounmap: |
982 | iounmap(host->base); | |
983 | out_free: | |
984 | mmc_free_host(mmc); | |
985 | out_release_mem: | |
c0521baf | 986 | release_mem_region(iores->start, resource_size(iores)); |
d96be879 SH |
987 | return ret; |
988 | } | |
989 | ||
990 | static int mxcmci_remove(struct platform_device *pdev) | |
991 | { | |
992 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
993 | struct mxcmci_host *host = mmc_priv(mmc); | |
994 | ||
995 | platform_set_drvdata(pdev, NULL); | |
996 | ||
997 | mmc_remove_host(mmc); | |
998 | ||
74b66954 AP |
999 | if (host->vcc) |
1000 | regulator_put(host->vcc); | |
1001 | ||
d96be879 SH |
1002 | if (host->pdata && host->pdata->exit) |
1003 | host->pdata->exit(&pdev->dev, mmc); | |
1004 | ||
1005 | free_irq(host->irq, host); | |
1006 | iounmap(host->base); | |
f53fbde4 SH |
1007 | |
1008 | if (host->dma) | |
1009 | dma_release_channel(host->dma); | |
1010 | ||
529aa29e SH |
1011 | clk_disable_unprepare(host->clk_per); |
1012 | clk_disable_unprepare(host->clk_ipg); | |
d96be879 SH |
1013 | |
1014 | release_mem_region(host->res->start, resource_size(host->res)); | |
d96be879 SH |
1015 | |
1016 | mmc_free_host(mmc); | |
1017 | ||
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | #ifdef CONFIG_PM | |
a7d403cf | 1022 | static int mxcmci_suspend(struct device *dev) |
d96be879 | 1023 | { |
a7d403cf EB |
1024 | struct mmc_host *mmc = dev_get_drvdata(dev); |
1025 | struct mxcmci_host *host = mmc_priv(mmc); | |
d96be879 SH |
1026 | int ret = 0; |
1027 | ||
1028 | if (mmc) | |
1a13f8fa | 1029 | ret = mmc_suspend_host(mmc); |
529aa29e SH |
1030 | clk_disable_unprepare(host->clk_per); |
1031 | clk_disable_unprepare(host->clk_ipg); | |
d96be879 SH |
1032 | |
1033 | return ret; | |
1034 | } | |
1035 | ||
a7d403cf | 1036 | static int mxcmci_resume(struct device *dev) |
d96be879 | 1037 | { |
a7d403cf EB |
1038 | struct mmc_host *mmc = dev_get_drvdata(dev); |
1039 | struct mxcmci_host *host = mmc_priv(mmc); | |
d96be879 SH |
1040 | int ret = 0; |
1041 | ||
529aa29e SH |
1042 | clk_prepare_enable(host->clk_per); |
1043 | clk_prepare_enable(host->clk_ipg); | |
a7d403cf | 1044 | if (mmc) |
d96be879 | 1045 | ret = mmc_resume_host(mmc); |
d96be879 SH |
1046 | |
1047 | return ret; | |
1048 | } | |
a7d403cf EB |
1049 | |
1050 | static const struct dev_pm_ops mxcmci_pm_ops = { | |
1051 | .suspend = mxcmci_suspend, | |
1052 | .resume = mxcmci_resume, | |
1053 | }; | |
1054 | #endif | |
d96be879 SH |
1055 | |
1056 | static struct platform_driver mxcmci_driver = { | |
1057 | .probe = mxcmci_probe, | |
1058 | .remove = mxcmci_remove, | |
d96be879 SH |
1059 | .driver = { |
1060 | .name = DRIVER_NAME, | |
1061 | .owner = THIS_MODULE, | |
a7d403cf EB |
1062 | #ifdef CONFIG_PM |
1063 | .pm = &mxcmci_pm_ops, | |
1064 | #endif | |
d96be879 SH |
1065 | } |
1066 | }; | |
1067 | ||
d1f81a64 | 1068 | module_platform_driver(mxcmci_driver); |
d96be879 SH |
1069 | |
1070 | MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); | |
1071 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
1072 | MODULE_LICENSE("GPL"); | |
1073 | MODULE_ALIAS("platform:imx-mmc"); |