Commit | Line | Data |
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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> |
7ff747c4 MP |
37 | #include <linux/of.h> |
38 | #include <linux/of_device.h> | |
39 | #include <linux/of_dma.h> | |
40 | #include <linux/of_gpio.h> | |
bcf53524 | 41 | #include <linux/mmc/slot-gpio.h> |
d96be879 SH |
42 | |
43 | #include <asm/dma.h> | |
44 | #include <asm/irq.h> | |
82906b13 | 45 | #include <linux/platform_data/mmc-mxcmmc.h> |
d96be879 | 46 | |
82906b13 | 47 | #include <linux/platform_data/dma-imx.h> |
d96be879 | 48 | |
9563b1db | 49 | #define DRIVER_NAME "mxc-mmc" |
f6ad0a48 | 50 | #define MXCMCI_TIMEOUT_MS 10000 |
d96be879 SH |
51 | |
52 | #define MMC_REG_STR_STP_CLK 0x00 | |
53 | #define MMC_REG_STATUS 0x04 | |
54 | #define MMC_REG_CLK_RATE 0x08 | |
55 | #define MMC_REG_CMD_DAT_CONT 0x0C | |
56 | #define MMC_REG_RES_TO 0x10 | |
57 | #define MMC_REG_READ_TO 0x14 | |
58 | #define MMC_REG_BLK_LEN 0x18 | |
59 | #define MMC_REG_NOB 0x1C | |
60 | #define MMC_REG_REV_NO 0x20 | |
61 | #define MMC_REG_INT_CNTR 0x24 | |
62 | #define MMC_REG_CMD 0x28 | |
63 | #define MMC_REG_ARG 0x2C | |
64 | #define MMC_REG_RES_FIFO 0x34 | |
65 | #define MMC_REG_BUFFER_ACCESS 0x38 | |
66 | ||
67 | #define STR_STP_CLK_RESET (1 << 3) | |
68 | #define STR_STP_CLK_START_CLK (1 << 1) | |
69 | #define STR_STP_CLK_STOP_CLK (1 << 0) | |
70 | ||
71 | #define STATUS_CARD_INSERTION (1 << 31) | |
72 | #define STATUS_CARD_REMOVAL (1 << 30) | |
73 | #define STATUS_YBUF_EMPTY (1 << 29) | |
74 | #define STATUS_XBUF_EMPTY (1 << 28) | |
75 | #define STATUS_YBUF_FULL (1 << 27) | |
76 | #define STATUS_XBUF_FULL (1 << 26) | |
77 | #define STATUS_BUF_UND_RUN (1 << 25) | |
78 | #define STATUS_BUF_OVFL (1 << 24) | |
79 | #define STATUS_SDIO_INT_ACTIVE (1 << 14) | |
80 | #define STATUS_END_CMD_RESP (1 << 13) | |
81 | #define STATUS_WRITE_OP_DONE (1 << 12) | |
82 | #define STATUS_DATA_TRANS_DONE (1 << 11) | |
83 | #define STATUS_READ_OP_DONE (1 << 11) | |
84 | #define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10) | |
85 | #define STATUS_CARD_BUS_CLK_RUN (1 << 8) | |
86 | #define STATUS_BUF_READ_RDY (1 << 7) | |
87 | #define STATUS_BUF_WRITE_RDY (1 << 6) | |
88 | #define STATUS_RESP_CRC_ERR (1 << 5) | |
89 | #define STATUS_CRC_READ_ERR (1 << 3) | |
90 | #define STATUS_CRC_WRITE_ERR (1 << 2) | |
91 | #define STATUS_TIME_OUT_RESP (1 << 1) | |
92 | #define STATUS_TIME_OUT_READ (1 << 0) | |
93 | #define STATUS_ERR_MASK 0x2f | |
94 | ||
95 | #define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12) | |
96 | #define CMD_DAT_CONT_STOP_READWAIT (1 << 11) | |
97 | #define CMD_DAT_CONT_START_READWAIT (1 << 10) | |
98 | #define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8) | |
99 | #define CMD_DAT_CONT_INIT (1 << 7) | |
100 | #define CMD_DAT_CONT_WRITE (1 << 4) | |
101 | #define CMD_DAT_CONT_DATA_ENABLE (1 << 3) | |
102 | #define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0) | |
103 | #define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0) | |
104 | #define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0) | |
105 | ||
106 | #define INT_SDIO_INT_WKP_EN (1 << 18) | |
107 | #define INT_CARD_INSERTION_WKP_EN (1 << 17) | |
108 | #define INT_CARD_REMOVAL_WKP_EN (1 << 16) | |
109 | #define INT_CARD_INSERTION_EN (1 << 15) | |
110 | #define INT_CARD_REMOVAL_EN (1 << 14) | |
111 | #define INT_SDIO_IRQ_EN (1 << 13) | |
112 | #define INT_DAT0_EN (1 << 12) | |
113 | #define INT_BUF_READ_EN (1 << 4) | |
114 | #define INT_BUF_WRITE_EN (1 << 3) | |
115 | #define INT_END_CMD_RES_EN (1 << 2) | |
116 | #define INT_WRITE_OP_DONE_EN (1 << 1) | |
117 | #define INT_READ_OP_EN (1 << 0) | |
118 | ||
7f917a8d SG |
119 | enum mxcmci_type { |
120 | IMX21_MMC, | |
121 | IMX31_MMC, | |
c7ceab02 | 122 | MPC512X_MMC, |
7f917a8d SG |
123 | }; |
124 | ||
d96be879 SH |
125 | struct mxcmci_host { |
126 | struct mmc_host *mmc; | |
d96be879 | 127 | void __iomem *base; |
01e4f958 | 128 | dma_addr_t phys_base; |
d96be879 | 129 | int detect_irq; |
f53fbde4 SH |
130 | struct dma_chan *dma; |
131 | struct dma_async_tx_descriptor *desc; | |
d96be879 | 132 | int do_dma; |
16b3bf8c | 133 | int default_irq_mask; |
f441b993 | 134 | int use_sdio; |
d96be879 SH |
135 | unsigned int power_mode; |
136 | struct imxmmc_platform_data *pdata; | |
137 | ||
138 | struct mmc_request *req; | |
139 | struct mmc_command *cmd; | |
140 | struct mmc_data *data; | |
141 | ||
d96be879 SH |
142 | unsigned int datasize; |
143 | unsigned int dma_dir; | |
144 | ||
145 | u16 rev_no; | |
146 | unsigned int cmdat; | |
147 | ||
529aa29e SH |
148 | struct clk *clk_ipg; |
149 | struct clk *clk_per; | |
d96be879 SH |
150 | |
151 | int clock; | |
152 | ||
153 | struct work_struct datawork; | |
f441b993 | 154 | spinlock_t lock; |
74b66954 | 155 | |
f53fbde4 SH |
156 | int burstlen; |
157 | int dmareq; | |
158 | struct dma_slave_config dma_slave_config; | |
159 | struct imx_dma_data dma_data; | |
f6ad0a48 JM |
160 | |
161 | struct timer_list watchdog; | |
7f917a8d SG |
162 | enum mxcmci_type devtype; |
163 | }; | |
164 | ||
42477053 | 165 | static const struct platform_device_id mxcmci_devtype[] = { |
7f917a8d SG |
166 | { |
167 | .name = "imx21-mmc", | |
168 | .driver_data = IMX21_MMC, | |
169 | }, { | |
170 | .name = "imx31-mmc", | |
171 | .driver_data = IMX31_MMC, | |
c7ceab02 AG |
172 | }, { |
173 | .name = "mpc512x-sdhc", | |
174 | .driver_data = MPC512X_MMC, | |
7f917a8d SG |
175 | }, { |
176 | /* sentinel */ | |
177 | } | |
d96be879 | 178 | }; |
7f917a8d SG |
179 | MODULE_DEVICE_TABLE(platform, mxcmci_devtype); |
180 | ||
7ff747c4 MP |
181 | static const struct of_device_id mxcmci_of_match[] = { |
182 | { | |
183 | .compatible = "fsl,imx21-mmc", | |
184 | .data = &mxcmci_devtype[IMX21_MMC], | |
185 | }, { | |
186 | .compatible = "fsl,imx31-mmc", | |
187 | .data = &mxcmci_devtype[IMX31_MMC], | |
c7ceab02 AG |
188 | }, { |
189 | .compatible = "fsl,mpc5121-sdhc", | |
190 | .data = &mxcmci_devtype[MPC512X_MMC], | |
7ff747c4 MP |
191 | }, { |
192 | /* sentinel */ | |
193 | } | |
194 | }; | |
195 | MODULE_DEVICE_TABLE(of, mxcmci_of_match); | |
196 | ||
7f917a8d SG |
197 | static inline int is_imx31_mmc(struct mxcmci_host *host) |
198 | { | |
199 | return host->devtype == IMX31_MMC; | |
200 | } | |
d96be879 | 201 | |
c7ceab02 AG |
202 | static inline int is_mpc512x_mmc(struct mxcmci_host *host) |
203 | { | |
204 | return host->devtype == MPC512X_MMC; | |
205 | } | |
206 | ||
207 | static inline u32 mxcmci_readl(struct mxcmci_host *host, int reg) | |
208 | { | |
209 | if (IS_ENABLED(CONFIG_PPC_MPC512x)) | |
210 | return ioread32be(host->base + reg); | |
211 | else | |
212 | return readl(host->base + reg); | |
213 | } | |
214 | ||
215 | static inline void mxcmci_writel(struct mxcmci_host *host, u32 val, int reg) | |
216 | { | |
217 | if (IS_ENABLED(CONFIG_PPC_MPC512x)) | |
218 | iowrite32be(val, host->base + reg); | |
219 | else | |
220 | writel(val, host->base + reg); | |
221 | } | |
222 | ||
223 | static inline u16 mxcmci_readw(struct mxcmci_host *host, int reg) | |
224 | { | |
225 | if (IS_ENABLED(CONFIG_PPC_MPC512x)) | |
226 | return ioread32be(host->base + reg); | |
227 | else | |
228 | return readw(host->base + reg); | |
229 | } | |
230 | ||
231 | static inline void mxcmci_writew(struct mxcmci_host *host, u16 val, int reg) | |
232 | { | |
233 | if (IS_ENABLED(CONFIG_PPC_MPC512x)) | |
234 | iowrite32be(val, host->base + reg); | |
235 | else | |
236 | writew(val, host->base + reg); | |
237 | } | |
238 | ||
18489fa2 MF |
239 | static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); |
240 | ||
bc3c1771 | 241 | static void mxcmci_set_power(struct mxcmci_host *host, unsigned int vdd) |
74b66954 | 242 | { |
bc3c1771 AS |
243 | if (!IS_ERR(host->mmc->supply.vmmc)) { |
244 | if (host->power_mode == MMC_POWER_UP) | |
245 | mmc_regulator_set_ocr(host->mmc, | |
246 | host->mmc->supply.vmmc, vdd); | |
247 | else if (host->power_mode == MMC_POWER_OFF) | |
248 | mmc_regulator_set_ocr(host->mmc, | |
249 | host->mmc->supply.vmmc, 0); | |
d078d242 AP |
250 | } |
251 | ||
74b66954 AP |
252 | if (host->pdata && host->pdata->setpower) |
253 | host->pdata->setpower(mmc_dev(host->mmc), vdd); | |
254 | } | |
255 | ||
d96be879 SH |
256 | static inline int mxcmci_use_dma(struct mxcmci_host *host) |
257 | { | |
258 | return host->do_dma; | |
259 | } | |
260 | ||
261 | static void mxcmci_softreset(struct mxcmci_host *host) | |
262 | { | |
263 | int i; | |
264 | ||
4725f6f1 DM |
265 | dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n"); |
266 | ||
d96be879 | 267 | /* reset sequence */ |
c7ceab02 AG |
268 | mxcmci_writew(host, STR_STP_CLK_RESET, MMC_REG_STR_STP_CLK); |
269 | mxcmci_writew(host, STR_STP_CLK_RESET | STR_STP_CLK_START_CLK, | |
270 | MMC_REG_STR_STP_CLK); | |
d96be879 SH |
271 | |
272 | for (i = 0; i < 8; i++) | |
c7ceab02 | 273 | mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); |
d96be879 | 274 | |
c7ceab02 | 275 | mxcmci_writew(host, 0xff, MMC_REG_RES_TO); |
d96be879 SH |
276 | } |
277 | ||
e48fc15a AG |
278 | #if IS_ENABLED(CONFIG_PPC_MPC512x) |
279 | static inline void buffer_swap32(u32 *buf, int len) | |
280 | { | |
281 | int i; | |
282 | ||
283 | for (i = 0; i < ((len + 3) / 4); i++) { | |
7a8bf874 | 284 | *buf = swab32(*buf); |
e48fc15a AG |
285 | buf++; |
286 | } | |
287 | } | |
288 | ||
289 | static void mxcmci_swap_buffers(struct mmc_data *data) | |
290 | { | |
291 | struct scatterlist *sg; | |
292 | int i; | |
293 | ||
294 | for_each_sg(data->sg, sg, data->sg_len, i) | |
295 | buffer_swap32(sg_virt(sg), sg->length); | |
296 | } | |
297 | #else | |
298 | static inline void mxcmci_swap_buffers(struct mmc_data *data) {} | |
299 | #endif | |
300 | ||
656217d2 | 301 | static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) |
d96be879 SH |
302 | { |
303 | unsigned int nob = data->blocks; | |
304 | unsigned int blksz = data->blksz; | |
305 | unsigned int datasize = nob * blksz; | |
d96be879 | 306 | struct scatterlist *sg; |
05f5799c | 307 | enum dma_transfer_direction slave_dirn; |
f53fbde4 SH |
308 | int i, nents; |
309 | ||
d96be879 SH |
310 | host->data = data; |
311 | data->bytes_xfered = 0; | |
312 | ||
c7ceab02 AG |
313 | mxcmci_writew(host, nob, MMC_REG_NOB); |
314 | mxcmci_writew(host, blksz, MMC_REG_BLK_LEN); | |
d96be879 SH |
315 | host->datasize = datasize; |
316 | ||
f53fbde4 SH |
317 | if (!mxcmci_use_dma(host)) |
318 | return 0; | |
319 | ||
d96be879 | 320 | for_each_sg(data->sg, sg, data->sg_len, i) { |
2cb53552 | 321 | if (sg->offset & 3 || sg->length & 3 || sg->length < 512) { |
d96be879 | 322 | host->do_dma = 0; |
656217d2 | 323 | return 0; |
d96be879 SH |
324 | } |
325 | } | |
326 | ||
05f5799c | 327 | if (data->flags & MMC_DATA_READ) { |
d96be879 | 328 | host->dma_dir = DMA_FROM_DEVICE; |
05f5799c VK |
329 | slave_dirn = DMA_DEV_TO_MEM; |
330 | } else { | |
d96be879 | 331 | host->dma_dir = DMA_TO_DEVICE; |
05f5799c | 332 | slave_dirn = DMA_MEM_TO_DEV; |
e48fc15a AG |
333 | |
334 | mxcmci_swap_buffers(data); | |
05f5799c | 335 | } |
d96be879 | 336 | |
f53fbde4 SH |
337 | nents = dma_map_sg(host->dma->device->dev, data->sg, |
338 | data->sg_len, host->dma_dir); | |
339 | if (nents != data->sg_len) | |
340 | return -EINVAL; | |
341 | ||
16052827 | 342 | host->desc = dmaengine_prep_slave_sg(host->dma, |
05f5799c | 343 | data->sg, data->sg_len, slave_dirn, |
f53fbde4 | 344 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
d96be879 | 345 | |
f53fbde4 SH |
346 | if (!host->desc) { |
347 | dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, | |
348 | host->dma_dir); | |
349 | host->do_dma = 0; | |
350 | return 0; /* Fall back to PIO */ | |
656217d2 | 351 | } |
d96be879 SH |
352 | wmb(); |
353 | ||
f53fbde4 | 354 | dmaengine_submit(host->desc); |
439aa0ef | 355 | dma_async_issue_pending(host->dma); |
f53fbde4 | 356 | |
f6ad0a48 JM |
357 | mod_timer(&host->watchdog, jiffies + msecs_to_jiffies(MXCMCI_TIMEOUT_MS)); |
358 | ||
656217d2 | 359 | return 0; |
d96be879 SH |
360 | } |
361 | ||
f6ad0a48 JM |
362 | static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat); |
363 | static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat); | |
364 | ||
365 | static void mxcmci_dma_callback(void *data) | |
366 | { | |
367 | struct mxcmci_host *host = data; | |
368 | u32 stat; | |
369 | ||
370 | del_timer(&host->watchdog); | |
371 | ||
c7ceab02 | 372 | stat = mxcmci_readl(host, MMC_REG_STATUS); |
f6ad0a48 JM |
373 | |
374 | dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); | |
375 | ||
f6ad0a48 JM |
376 | mxcmci_data_done(host, stat); |
377 | } | |
378 | ||
d96be879 SH |
379 | static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, |
380 | unsigned int cmdat) | |
381 | { | |
16b3bf8c | 382 | u32 int_cntr = host->default_irq_mask; |
f441b993 DM |
383 | unsigned long flags; |
384 | ||
d96be879 SH |
385 | WARN_ON(host->cmd != NULL); |
386 | host->cmd = cmd; | |
387 | ||
388 | switch (mmc_resp_type(cmd)) { | |
389 | case MMC_RSP_R1: /* short CRC, OPCODE */ | |
390 | case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ | |
391 | cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC; | |
392 | break; | |
393 | case MMC_RSP_R2: /* long 136 bit + CRC */ | |
394 | cmdat |= CMD_DAT_CONT_RESPONSE_136BIT; | |
395 | break; | |
396 | case MMC_RSP_R3: /* short */ | |
397 | cmdat |= CMD_DAT_CONT_RESPONSE_48BIT; | |
398 | break; | |
399 | case MMC_RSP_NONE: | |
400 | break; | |
401 | default: | |
402 | dev_err(mmc_dev(host->mmc), "unhandled response type 0x%x\n", | |
403 | mmc_resp_type(cmd)); | |
404 | cmd->error = -EINVAL; | |
405 | return -EINVAL; | |
406 | } | |
407 | ||
f441b993 DM |
408 | int_cntr = INT_END_CMD_RES_EN; |
409 | ||
f6ad0a48 JM |
410 | if (mxcmci_use_dma(host)) { |
411 | if (host->dma_dir == DMA_FROM_DEVICE) { | |
412 | host->desc->callback = mxcmci_dma_callback; | |
413 | host->desc->callback_param = host; | |
414 | } else { | |
415 | int_cntr |= INT_WRITE_OP_DONE_EN; | |
416 | } | |
417 | } | |
f441b993 DM |
418 | |
419 | spin_lock_irqsave(&host->lock, flags); | |
420 | if (host->use_sdio) | |
421 | int_cntr |= INT_SDIO_IRQ_EN; | |
c7ceab02 | 422 | mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); |
f441b993 | 423 | spin_unlock_irqrestore(&host->lock, flags); |
d96be879 | 424 | |
c7ceab02 AG |
425 | mxcmci_writew(host, cmd->opcode, MMC_REG_CMD); |
426 | mxcmci_writel(host, cmd->arg, MMC_REG_ARG); | |
427 | mxcmci_writew(host, cmdat, MMC_REG_CMD_DAT_CONT); | |
d96be879 SH |
428 | |
429 | return 0; | |
430 | } | |
431 | ||
432 | static void mxcmci_finish_request(struct mxcmci_host *host, | |
433 | struct mmc_request *req) | |
434 | { | |
16b3bf8c | 435 | u32 int_cntr = host->default_irq_mask; |
f441b993 DM |
436 | unsigned long flags; |
437 | ||
438 | spin_lock_irqsave(&host->lock, flags); | |
439 | if (host->use_sdio) | |
440 | int_cntr |= INT_SDIO_IRQ_EN; | |
c7ceab02 | 441 | mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); |
f441b993 | 442 | spin_unlock_irqrestore(&host->lock, flags); |
d96be879 SH |
443 | |
444 | host->req = NULL; | |
445 | host->cmd = NULL; | |
446 | host->data = NULL; | |
447 | ||
448 | mmc_request_done(host->mmc, req); | |
449 | } | |
450 | ||
451 | static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat) | |
452 | { | |
453 | struct mmc_data *data = host->data; | |
454 | int data_error; | |
455 | ||
e48fc15a | 456 | if (mxcmci_use_dma(host)) { |
f53fbde4 | 457 | dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len, |
d96be879 | 458 | host->dma_dir); |
e48fc15a AG |
459 | mxcmci_swap_buffers(data); |
460 | } | |
d96be879 SH |
461 | |
462 | if (stat & STATUS_ERR_MASK) { | |
463 | dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n", | |
464 | stat); | |
465 | if (stat & STATUS_CRC_READ_ERR) { | |
4725f6f1 | 466 | dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__); |
d96be879 SH |
467 | data->error = -EILSEQ; |
468 | } else if (stat & STATUS_CRC_WRITE_ERR) { | |
469 | u32 err_code = (stat >> 9) & 0x3; | |
4725f6f1 DM |
470 | if (err_code == 2) { /* No CRC response */ |
471 | dev_err(mmc_dev(host->mmc), | |
472 | "%s: No CRC -ETIMEDOUT\n", __func__); | |
d96be879 | 473 | data->error = -ETIMEDOUT; |
4725f6f1 DM |
474 | } else { |
475 | dev_err(mmc_dev(host->mmc), | |
476 | "%s: -EILSEQ\n", __func__); | |
d96be879 | 477 | data->error = -EILSEQ; |
4725f6f1 | 478 | } |
d96be879 | 479 | } else if (stat & STATUS_TIME_OUT_READ) { |
4725f6f1 DM |
480 | dev_err(mmc_dev(host->mmc), |
481 | "%s: read -ETIMEDOUT\n", __func__); | |
d96be879 SH |
482 | data->error = -ETIMEDOUT; |
483 | } else { | |
4725f6f1 | 484 | dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__); |
d96be879 SH |
485 | data->error = -EIO; |
486 | } | |
487 | } else { | |
488 | data->bytes_xfered = host->datasize; | |
489 | } | |
490 | ||
491 | data_error = data->error; | |
492 | ||
493 | host->data = NULL; | |
494 | ||
495 | return data_error; | |
496 | } | |
497 | ||
498 | static void mxcmci_read_response(struct mxcmci_host *host, unsigned int stat) | |
499 | { | |
500 | struct mmc_command *cmd = host->cmd; | |
501 | int i; | |
502 | u32 a, b, c; | |
503 | ||
504 | if (!cmd) | |
505 | return; | |
506 | ||
507 | if (stat & STATUS_TIME_OUT_RESP) { | |
508 | dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); | |
509 | cmd->error = -ETIMEDOUT; | |
510 | } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { | |
511 | dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); | |
512 | cmd->error = -EILSEQ; | |
513 | } | |
514 | ||
515 | if (cmd->flags & MMC_RSP_PRESENT) { | |
516 | if (cmd->flags & MMC_RSP_136) { | |
517 | for (i = 0; i < 4; i++) { | |
c7ceab02 AG |
518 | a = mxcmci_readw(host, MMC_REG_RES_FIFO); |
519 | b = mxcmci_readw(host, MMC_REG_RES_FIFO); | |
d96be879 SH |
520 | cmd->resp[i] = a << 16 | b; |
521 | } | |
522 | } else { | |
c7ceab02 AG |
523 | a = mxcmci_readw(host, MMC_REG_RES_FIFO); |
524 | b = mxcmci_readw(host, MMC_REG_RES_FIFO); | |
525 | c = mxcmci_readw(host, MMC_REG_RES_FIFO); | |
d96be879 SH |
526 | cmd->resp[0] = a << 24 | b << 8 | c >> 8; |
527 | } | |
528 | } | |
529 | } | |
530 | ||
531 | static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask) | |
532 | { | |
533 | u32 stat; | |
534 | unsigned long timeout = jiffies + HZ; | |
535 | ||
536 | do { | |
c7ceab02 | 537 | stat = mxcmci_readl(host, MMC_REG_STATUS); |
d96be879 SH |
538 | if (stat & STATUS_ERR_MASK) |
539 | return stat; | |
18489fa2 MF |
540 | if (time_after(jiffies, timeout)) { |
541 | mxcmci_softreset(host); | |
542 | mxcmci_set_clk_rate(host, host->clock); | |
d96be879 | 543 | return STATUS_TIME_OUT_READ; |
18489fa2 | 544 | } |
d96be879 SH |
545 | if (stat & mask) |
546 | return 0; | |
547 | cpu_relax(); | |
548 | } while (1); | |
549 | } | |
550 | ||
551 | static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes) | |
552 | { | |
553 | unsigned int stat; | |
554 | u32 *buf = _buf; | |
555 | ||
556 | while (bytes > 3) { | |
557 | stat = mxcmci_poll_status(host, | |
558 | STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); | |
559 | if (stat) | |
560 | return stat; | |
c7ceab02 | 561 | *buf++ = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); |
d96be879 SH |
562 | bytes -= 4; |
563 | } | |
564 | ||
565 | if (bytes) { | |
566 | u8 *b = (u8 *)buf; | |
567 | u32 tmp; | |
568 | ||
569 | stat = mxcmci_poll_status(host, | |
570 | STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE); | |
571 | if (stat) | |
572 | return stat; | |
c7ceab02 | 573 | tmp = cpu_to_le32(mxcmci_readl(host, MMC_REG_BUFFER_ACCESS)); |
d96be879 SH |
574 | memcpy(b, &tmp, bytes); |
575 | } | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static int mxcmci_push(struct mxcmci_host *host, void *_buf, int bytes) | |
581 | { | |
582 | unsigned int stat; | |
583 | u32 *buf = _buf; | |
584 | ||
585 | while (bytes > 3) { | |
586 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); | |
587 | if (stat) | |
588 | return stat; | |
c7ceab02 | 589 | mxcmci_writel(host, cpu_to_le32(*buf++), MMC_REG_BUFFER_ACCESS); |
d96be879 SH |
590 | bytes -= 4; |
591 | } | |
592 | ||
593 | if (bytes) { | |
594 | u8 *b = (u8 *)buf; | |
595 | u32 tmp; | |
596 | ||
597 | stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); | |
598 | if (stat) | |
599 | return stat; | |
600 | ||
601 | memcpy(&tmp, b, bytes); | |
c7ceab02 | 602 | mxcmci_writel(host, cpu_to_le32(tmp), MMC_REG_BUFFER_ACCESS); |
d96be879 SH |
603 | } |
604 | ||
6d916416 | 605 | return mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY); |
d96be879 SH |
606 | } |
607 | ||
608 | static int mxcmci_transfer_data(struct mxcmci_host *host) | |
609 | { | |
610 | struct mmc_data *data = host->req->data; | |
611 | struct scatterlist *sg; | |
612 | int stat, i; | |
613 | ||
d96be879 SH |
614 | host->data = data; |
615 | host->datasize = 0; | |
616 | ||
617 | if (data->flags & MMC_DATA_READ) { | |
618 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
619 | stat = mxcmci_pull(host, sg_virt(sg), sg->length); | |
620 | if (stat) | |
621 | return stat; | |
622 | host->datasize += sg->length; | |
623 | } | |
624 | } else { | |
625 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
626 | stat = mxcmci_push(host, sg_virt(sg), sg->length); | |
627 | if (stat) | |
628 | return stat; | |
629 | host->datasize += sg->length; | |
630 | } | |
631 | stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE); | |
632 | if (stat) | |
633 | return stat; | |
634 | } | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static void mxcmci_datawork(struct work_struct *work) | |
639 | { | |
640 | struct mxcmci_host *host = container_of(work, struct mxcmci_host, | |
641 | datawork); | |
642 | int datastat = mxcmci_transfer_data(host); | |
4a31f2ef | 643 | |
c7ceab02 AG |
644 | mxcmci_writel(host, STATUS_READ_OP_DONE | STATUS_WRITE_OP_DONE, |
645 | MMC_REG_STATUS); | |
d96be879 SH |
646 | mxcmci_finish_data(host, datastat); |
647 | ||
648 | if (host->req->stop) { | |
649 | if (mxcmci_start_cmd(host, host->req->stop, 0)) { | |
650 | mxcmci_finish_request(host, host->req); | |
651 | return; | |
652 | } | |
653 | } else { | |
654 | mxcmci_finish_request(host, host->req); | |
655 | } | |
656 | } | |
657 | ||
d96be879 SH |
658 | static void mxcmci_data_done(struct mxcmci_host *host, unsigned int stat) |
659 | { | |
70aa6109 | 660 | struct mmc_request *req; |
d96be879 | 661 | int data_error; |
70aa6109 AG |
662 | unsigned long flags; |
663 | ||
664 | spin_lock_irqsave(&host->lock, flags); | |
d96be879 | 665 | |
70aa6109 AG |
666 | if (!host->data) { |
667 | spin_unlock_irqrestore(&host->lock, flags); | |
d96be879 | 668 | return; |
70aa6109 AG |
669 | } |
670 | ||
671 | if (!host->req) { | |
672 | spin_unlock_irqrestore(&host->lock, flags); | |
673 | return; | |
674 | } | |
675 | ||
676 | req = host->req; | |
677 | if (!req->stop) | |
678 | host->req = NULL; /* we will handle finish req below */ | |
d96be879 SH |
679 | |
680 | data_error = mxcmci_finish_data(host, stat); | |
681 | ||
70aa6109 AG |
682 | spin_unlock_irqrestore(&host->lock, flags); |
683 | ||
d96be879 SH |
684 | mxcmci_read_response(host, stat); |
685 | host->cmd = NULL; | |
686 | ||
70aa6109 AG |
687 | if (req->stop) { |
688 | if (mxcmci_start_cmd(host, req->stop, 0)) { | |
689 | mxcmci_finish_request(host, req); | |
d96be879 SH |
690 | return; |
691 | } | |
692 | } else { | |
70aa6109 | 693 | mxcmci_finish_request(host, req); |
d96be879 SH |
694 | } |
695 | } | |
d96be879 SH |
696 | |
697 | static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) | |
698 | { | |
699 | mxcmci_read_response(host, stat); | |
700 | host->cmd = NULL; | |
701 | ||
702 | if (!host->data && host->req) { | |
703 | mxcmci_finish_request(host, host->req); | |
704 | return; | |
705 | } | |
706 | ||
707 | /* For the DMA case the DMA engine handles the data transfer | |
fd589a8f | 708 | * automatically. For non DMA we have to do it ourselves. |
d96be879 SH |
709 | * Don't do it in interrupt context though. |
710 | */ | |
711 | if (!mxcmci_use_dma(host) && host->data) | |
712 | schedule_work(&host->datawork); | |
713 | ||
714 | } | |
715 | ||
716 | static irqreturn_t mxcmci_irq(int irq, void *devid) | |
717 | { | |
718 | struct mxcmci_host *host = devid; | |
f441b993 DM |
719 | unsigned long flags; |
720 | bool sdio_irq; | |
d96be879 SH |
721 | u32 stat; |
722 | ||
c7ceab02 AG |
723 | stat = mxcmci_readl(host, MMC_REG_STATUS); |
724 | mxcmci_writel(host, | |
725 | stat & ~(STATUS_SDIO_INT_ACTIVE | STATUS_DATA_TRANS_DONE | | |
726 | STATUS_WRITE_OP_DONE), | |
727 | MMC_REG_STATUS); | |
d96be879 SH |
728 | |
729 | dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); | |
730 | ||
f441b993 DM |
731 | spin_lock_irqsave(&host->lock, flags); |
732 | sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; | |
733 | spin_unlock_irqrestore(&host->lock, flags); | |
734 | ||
adfa5703 MF |
735 | if (mxcmci_use_dma(host) && (stat & (STATUS_WRITE_OP_DONE))) |
736 | mxcmci_writel(host, STATUS_WRITE_OP_DONE, MMC_REG_STATUS); | |
4a31f2ef | 737 | |
f441b993 | 738 | if (sdio_irq) { |
c7ceab02 | 739 | mxcmci_writel(host, STATUS_SDIO_INT_ACTIVE, MMC_REG_STATUS); |
f441b993 DM |
740 | mmc_signal_sdio_irq(host->mmc); |
741 | } | |
742 | ||
d96be879 SH |
743 | if (stat & STATUS_END_CMD_RESP) |
744 | mxcmci_cmd_done(host, stat); | |
f441b993 | 745 | |
adfa5703 | 746 | if (mxcmci_use_dma(host) && (stat & STATUS_WRITE_OP_DONE)) { |
f6ad0a48 | 747 | del_timer(&host->watchdog); |
d96be879 | 748 | mxcmci_data_done(host, stat); |
f6ad0a48 | 749 | } |
f53fbde4 | 750 | |
16b3bf8c EB |
751 | if (host->default_irq_mask && |
752 | (stat & (STATUS_CARD_INSERTION | STATUS_CARD_REMOVAL))) | |
753 | mmc_detect_change(host->mmc, msecs_to_jiffies(200)); | |
f53fbde4 | 754 | |
d96be879 SH |
755 | return IRQ_HANDLED; |
756 | } | |
757 | ||
758 | static void mxcmci_request(struct mmc_host *mmc, struct mmc_request *req) | |
759 | { | |
760 | struct mxcmci_host *host = mmc_priv(mmc); | |
761 | unsigned int cmdat = host->cmdat; | |
656217d2 | 762 | int error; |
d96be879 SH |
763 | |
764 | WARN_ON(host->req != NULL); | |
765 | ||
766 | host->req = req; | |
767 | host->cmdat &= ~CMD_DAT_CONT_INIT; | |
f53fbde4 SH |
768 | |
769 | if (host->dma) | |
770 | host->do_dma = 1; | |
771 | ||
d96be879 | 772 | if (req->data) { |
656217d2 MF |
773 | error = mxcmci_setup_data(host, req->data); |
774 | if (error) { | |
775 | req->cmd->error = error; | |
776 | goto out; | |
777 | } | |
778 | ||
d96be879 SH |
779 | |
780 | cmdat |= CMD_DAT_CONT_DATA_ENABLE; | |
781 | ||
782 | if (req->data->flags & MMC_DATA_WRITE) | |
783 | cmdat |= CMD_DAT_CONT_WRITE; | |
784 | } | |
785 | ||
656217d2 | 786 | error = mxcmci_start_cmd(host, req->cmd, cmdat); |
f53fbde4 | 787 | |
656217d2 MF |
788 | out: |
789 | if (error) | |
d96be879 SH |
790 | mxcmci_finish_request(host, req); |
791 | } | |
792 | ||
793 | static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios) | |
794 | { | |
795 | unsigned int divider; | |
796 | int prescaler = 0; | |
529aa29e | 797 | unsigned int clk_in = clk_get_rate(host->clk_per); |
d96be879 SH |
798 | |
799 | while (prescaler <= 0x800) { | |
800 | for (divider = 1; divider <= 0xF; divider++) { | |
801 | int x; | |
802 | ||
803 | x = (clk_in / (divider + 1)); | |
804 | ||
805 | if (prescaler) | |
806 | x /= (prescaler * 2); | |
807 | ||
808 | if (x <= clk_ios) | |
809 | break; | |
810 | } | |
811 | if (divider < 0x10) | |
812 | break; | |
813 | ||
814 | if (prescaler == 0) | |
815 | prescaler = 1; | |
816 | else | |
817 | prescaler <<= 1; | |
818 | } | |
819 | ||
c7ceab02 | 820 | mxcmci_writew(host, (prescaler << 4) | divider, MMC_REG_CLK_RATE); |
d96be879 SH |
821 | |
822 | dev_dbg(mmc_dev(host->mmc), "scaler: %d divider: %d in: %d out: %d\n", | |
823 | prescaler, divider, clk_in, clk_ios); | |
824 | } | |
825 | ||
f53fbde4 SH |
826 | static int mxcmci_setup_dma(struct mmc_host *mmc) |
827 | { | |
828 | struct mxcmci_host *host = mmc_priv(mmc); | |
829 | struct dma_slave_config *config = &host->dma_slave_config; | |
830 | ||
01e4f958 AS |
831 | config->dst_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; |
832 | config->src_addr = host->phys_base + MMC_REG_BUFFER_ACCESS; | |
f53fbde4 SH |
833 | config->dst_addr_width = 4; |
834 | config->src_addr_width = 4; | |
835 | config->dst_maxburst = host->burstlen; | |
836 | config->src_maxburst = host->burstlen; | |
258aea76 | 837 | config->device_fc = false; |
f53fbde4 SH |
838 | |
839 | return dmaengine_slave_config(host->dma, config); | |
840 | } | |
841 | ||
d96be879 SH |
842 | static void mxcmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
843 | { | |
844 | struct mxcmci_host *host = mmc_priv(mmc); | |
f53fbde4 SH |
845 | int burstlen, ret; |
846 | ||
d96be879 | 847 | /* |
6584cb88 SH |
848 | * use burstlen of 64 (16 words) in 4 bit mode (--> reg value 0) |
849 | * use burstlen of 16 (4 words) in 1 bit mode (--> reg value 16) | |
d96be879 SH |
850 | */ |
851 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
f53fbde4 | 852 | burstlen = 16; |
6584cb88 SH |
853 | else |
854 | burstlen = 4; | |
f53fbde4 SH |
855 | |
856 | if (mxcmci_use_dma(host) && burstlen != host->burstlen) { | |
857 | host->burstlen = burstlen; | |
858 | ret = mxcmci_setup_dma(mmc); | |
859 | if (ret) { | |
860 | dev_err(mmc_dev(host->mmc), | |
861 | "failed to config DMA channel. Falling back to PIO\n"); | |
862 | dma_release_channel(host->dma); | |
863 | host->do_dma = 0; | |
e58f516f | 864 | host->dma = NULL; |
f53fbde4 SH |
865 | } |
866 | } | |
d96be879 | 867 | |
d96be879 SH |
868 | if (ios->bus_width == MMC_BUS_WIDTH_4) |
869 | host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; | |
870 | else | |
871 | host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4; | |
872 | ||
873 | if (host->power_mode != ios->power_mode) { | |
d96be879 | 874 | host->power_mode = ios->power_mode; |
bc3c1771 | 875 | mxcmci_set_power(host, ios->vdd); |
74b66954 | 876 | |
d96be879 SH |
877 | if (ios->power_mode == MMC_POWER_ON) |
878 | host->cmdat |= CMD_DAT_CONT_INIT; | |
879 | } | |
880 | ||
881 | if (ios->clock) { | |
882 | mxcmci_set_clk_rate(host, ios->clock); | |
c7ceab02 | 883 | mxcmci_writew(host, STR_STP_CLK_START_CLK, MMC_REG_STR_STP_CLK); |
d96be879 | 884 | } else { |
c7ceab02 | 885 | mxcmci_writew(host, STR_STP_CLK_STOP_CLK, MMC_REG_STR_STP_CLK); |
d96be879 SH |
886 | } |
887 | ||
888 | host->clock = ios->clock; | |
889 | } | |
890 | ||
891 | static irqreturn_t mxcmci_detect_irq(int irq, void *data) | |
892 | { | |
893 | struct mmc_host *mmc = data; | |
894 | ||
895 | dev_dbg(mmc_dev(mmc), "%s\n", __func__); | |
896 | ||
897 | mmc_detect_change(mmc, msecs_to_jiffies(250)); | |
898 | return IRQ_HANDLED; | |
899 | } | |
900 | ||
901 | static int mxcmci_get_ro(struct mmc_host *mmc) | |
902 | { | |
903 | struct mxcmci_host *host = mmc_priv(mmc); | |
904 | ||
905 | if (host->pdata && host->pdata->get_ro) | |
906 | return !!host->pdata->get_ro(mmc_dev(mmc)); | |
907 | /* | |
bcf53524 AG |
908 | * If board doesn't support read only detection (no mmc_gpio |
909 | * context or gpio is invalid), then let the mmc core decide | |
910 | * what to do. | |
d96be879 | 911 | */ |
bcf53524 | 912 | return mmc_gpio_get_ro(mmc); |
d96be879 SH |
913 | } |
914 | ||
f441b993 DM |
915 | static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) |
916 | { | |
917 | struct mxcmci_host *host = mmc_priv(mmc); | |
918 | unsigned long flags; | |
919 | u32 int_cntr; | |
920 | ||
921 | spin_lock_irqsave(&host->lock, flags); | |
922 | host->use_sdio = enable; | |
c7ceab02 | 923 | int_cntr = mxcmci_readl(host, MMC_REG_INT_CNTR); |
f441b993 DM |
924 | |
925 | if (enable) | |
926 | int_cntr |= INT_SDIO_IRQ_EN; | |
927 | else | |
928 | int_cntr &= ~INT_SDIO_IRQ_EN; | |
929 | ||
c7ceab02 | 930 | mxcmci_writel(host, int_cntr, MMC_REG_INT_CNTR); |
f441b993 DM |
931 | spin_unlock_irqrestore(&host->lock, flags); |
932 | } | |
d96be879 | 933 | |
3fcb027d DM |
934 | static void mxcmci_init_card(struct mmc_host *host, struct mmc_card *card) |
935 | { | |
7f917a8d SG |
936 | struct mxcmci_host *mxcmci = mmc_priv(host); |
937 | ||
3fcb027d DM |
938 | /* |
939 | * MX3 SoCs have a silicon bug which corrupts CRC calculation of | |
940 | * multi-block transfers when connected SDIO peripheral doesn't | |
941 | * drive the BUSY line as required by the specs. | |
942 | * One way to prevent this is to only allow 1-bit transfers. | |
943 | */ | |
944 | ||
7f917a8d | 945 | if (is_imx31_mmc(mxcmci) && card->type == MMC_TYPE_SDIO) |
3fcb027d DM |
946 | host->caps &= ~MMC_CAP_4_BIT_DATA; |
947 | else | |
948 | host->caps |= MMC_CAP_4_BIT_DATA; | |
949 | } | |
950 | ||
f53fbde4 SH |
951 | static bool filter(struct dma_chan *chan, void *param) |
952 | { | |
953 | struct mxcmci_host *host = param; | |
954 | ||
955 | if (!imx_dma_is_general_purpose(chan)) | |
956 | return false; | |
957 | ||
958 | chan->private = &host->dma_data; | |
959 | ||
960 | return true; | |
961 | } | |
962 | ||
f6ad0a48 JM |
963 | static void mxcmci_watchdog(unsigned long data) |
964 | { | |
965 | struct mmc_host *mmc = (struct mmc_host *)data; | |
966 | struct mxcmci_host *host = mmc_priv(mmc); | |
967 | struct mmc_request *req = host->req; | |
c7ceab02 | 968 | unsigned int stat = mxcmci_readl(host, MMC_REG_STATUS); |
f6ad0a48 JM |
969 | |
970 | if (host->dma_dir == DMA_FROM_DEVICE) { | |
971 | dmaengine_terminate_all(host->dma); | |
972 | dev_err(mmc_dev(host->mmc), | |
973 | "%s: read time out (status = 0x%08x)\n", | |
974 | __func__, stat); | |
975 | } else { | |
976 | dev_err(mmc_dev(host->mmc), | |
977 | "%s: write time out (status = 0x%08x)\n", | |
978 | __func__, stat); | |
979 | mxcmci_softreset(host); | |
980 | } | |
981 | ||
982 | /* Mark transfer as erroneus and inform the upper layers */ | |
983 | ||
70aa6109 AG |
984 | if (host->data) |
985 | host->data->error = -ETIMEDOUT; | |
f6ad0a48 JM |
986 | host->req = NULL; |
987 | host->cmd = NULL; | |
988 | host->data = NULL; | |
989 | mmc_request_done(host->mmc, req); | |
990 | } | |
991 | ||
d96be879 | 992 | static const struct mmc_host_ops mxcmci_ops = { |
f441b993 DM |
993 | .request = mxcmci_request, |
994 | .set_ios = mxcmci_set_ios, | |
995 | .get_ro = mxcmci_get_ro, | |
996 | .enable_sdio_irq = mxcmci_enable_sdio_irq, | |
3fcb027d | 997 | .init_card = mxcmci_init_card, |
d96be879 SH |
998 | }; |
999 | ||
1000 | static int mxcmci_probe(struct platform_device *pdev) | |
1001 | { | |
1002 | struct mmc_host *mmc; | |
01e4f958 AS |
1003 | struct mxcmci_host *host; |
1004 | struct resource *res; | |
d96be879 | 1005 | int ret = 0, irq; |
7ff747c4 | 1006 | bool dat3_card_detect = false; |
f53fbde4 | 1007 | dma_cap_mask_t mask; |
7ff747c4 MP |
1008 | const struct of_device_id *of_id; |
1009 | struct imxmmc_platform_data *pdata = pdev->dev.platform_data; | |
d96be879 | 1010 | |
c7ceab02 | 1011 | pr_info("i.MX/MPC512x SDHC driver\n"); |
d96be879 | 1012 | |
7ff747c4 MP |
1013 | of_id = of_match_device(mxcmci_of_match, &pdev->dev); |
1014 | ||
01e4f958 | 1015 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
d96be879 | 1016 | irq = platform_get_irq(pdev, 0); |
01e4f958 | 1017 | if (irq < 0) |
d96be879 SH |
1018 | return -EINVAL; |
1019 | ||
01e4f958 AS |
1020 | mmc = mmc_alloc_host(sizeof(*host), &pdev->dev); |
1021 | if (!mmc) | |
1022 | return -ENOMEM; | |
d96be879 | 1023 | |
01e4f958 AS |
1024 | host = mmc_priv(mmc); |
1025 | ||
1026 | host->base = devm_ioremap_resource(&pdev->dev, res); | |
1027 | if (IS_ERR(host->base)) { | |
1028 | ret = PTR_ERR(host->base); | |
1029 | goto out_free; | |
d96be879 SH |
1030 | } |
1031 | ||
01e4f958 AS |
1032 | host->phys_base = res->start; |
1033 | ||
b8857696 SB |
1034 | ret = mmc_of_parse(mmc); |
1035 | if (ret) | |
1036 | goto out_free; | |
d96be879 | 1037 | mmc->ops = &mxcmci_ops; |
7ff747c4 MP |
1038 | |
1039 | /* For devicetree parsing, the bus width is read from devicetree */ | |
1040 | if (pdata) | |
1041 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; | |
1042 | else | |
1043 | mmc->caps |= MMC_CAP_SDIO_IRQ; | |
d96be879 SH |
1044 | |
1045 | /* MMC core transfer sizes tunable parameters */ | |
d96be879 SH |
1046 | mmc->max_blk_size = 2048; |
1047 | mmc->max_blk_count = 65535; | |
1048 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
d759c374 | 1049 | mmc->max_seg_size = mmc->max_req_size; |
d96be879 | 1050 | |
7ff747c4 MP |
1051 | if (of_id) { |
1052 | const struct platform_device_id *id_entry = of_id->data; | |
1053 | host->devtype = id_entry->driver_data; | |
1054 | } else { | |
1055 | host->devtype = pdev->id_entry->driver_data; | |
1056 | } | |
e48fc15a AG |
1057 | |
1058 | /* adjust max_segs after devtype detection */ | |
1059 | if (!is_mpc512x_mmc(host)) | |
1060 | mmc->max_segs = 64; | |
1061 | ||
d96be879 | 1062 | host->mmc = mmc; |
7ff747c4 | 1063 | host->pdata = pdata; |
f441b993 | 1064 | spin_lock_init(&host->lock); |
d96be879 | 1065 | |
7ff747c4 MP |
1066 | if (pdata) |
1067 | dat3_card_detect = pdata->dat3_card_detect; | |
1068 | else if (!(mmc->caps & MMC_CAP_NONREMOVABLE) | |
1069 | && !of_property_read_bool(pdev->dev.of_node, "cd-gpios")) | |
1070 | dat3_card_detect = true; | |
1071 | ||
bc3c1771 | 1072 | ret = mmc_regulator_get_supply(mmc); |
18a09806 MF |
1073 | if (ret == -EPROBE_DEFER) |
1074 | goto out_free; | |
1075 | ||
1076 | if (!mmc->ocr_avail) { | |
1077 | if (pdata && pdata->ocr_avail) | |
1078 | mmc->ocr_avail = pdata->ocr_avail; | |
bc3c1771 | 1079 | else |
18a09806 | 1080 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; |
bc3c1771 | 1081 | } |
d96be879 | 1082 | |
7ff747c4 | 1083 | if (dat3_card_detect) |
16b3bf8c EB |
1084 | host->default_irq_mask = |
1085 | INT_CARD_INSERTION_EN | INT_CARD_REMOVAL_EN; | |
1086 | else | |
1087 | host->default_irq_mask = 0; | |
1088 | ||
529aa29e SH |
1089 | host->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); |
1090 | if (IS_ERR(host->clk_ipg)) { | |
1091 | ret = PTR_ERR(host->clk_ipg); | |
01e4f958 | 1092 | goto out_free; |
d96be879 | 1093 | } |
529aa29e SH |
1094 | |
1095 | host->clk_per = devm_clk_get(&pdev->dev, "per"); | |
1096 | if (IS_ERR(host->clk_per)) { | |
1097 | ret = PTR_ERR(host->clk_per); | |
01e4f958 | 1098 | goto out_free; |
529aa29e SH |
1099 | } |
1100 | ||
1101 | clk_prepare_enable(host->clk_per); | |
1102 | clk_prepare_enable(host->clk_ipg); | |
d96be879 SH |
1103 | |
1104 | mxcmci_softreset(host); | |
1105 | ||
c7ceab02 | 1106 | host->rev_no = mxcmci_readw(host, MMC_REG_REV_NO); |
d96be879 SH |
1107 | if (host->rev_no != 0x400) { |
1108 | ret = -ENODEV; | |
1109 | dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", | |
1110 | host->rev_no); | |
1111 | goto out_clk_put; | |
1112 | } | |
1113 | ||
529aa29e SH |
1114 | mmc->f_min = clk_get_rate(host->clk_per) >> 16; |
1115 | mmc->f_max = clk_get_rate(host->clk_per) >> 1; | |
d96be879 SH |
1116 | |
1117 | /* recommended in data sheet */ | |
c7ceab02 | 1118 | mxcmci_writew(host, 0x2db4, MMC_REG_READ_TO); |
d96be879 | 1119 | |
c7ceab02 | 1120 | mxcmci_writel(host, host->default_irq_mask, MMC_REG_INT_CNTR); |
d96be879 | 1121 | |
7ff747c4 MP |
1122 | if (!host->pdata) { |
1123 | host->dma = dma_request_slave_channel(&pdev->dev, "rx-tx"); | |
1124 | } else { | |
01e4f958 AS |
1125 | res = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
1126 | if (res) { | |
1127 | host->dmareq = res->start; | |
7ff747c4 MP |
1128 | host->dma_data.peripheral_type = IMX_DMATYPE_SDHC; |
1129 | host->dma_data.priority = DMA_PRIO_LOW; | |
1130 | host->dma_data.dma_request = host->dmareq; | |
1131 | dma_cap_zero(mask); | |
1132 | dma_cap_set(DMA_SLAVE, mask); | |
1133 | host->dma = dma_request_channel(mask, filter, host); | |
1134 | } | |
f53fbde4 | 1135 | } |
7ff747c4 MP |
1136 | if (host->dma) |
1137 | mmc->max_seg_size = dma_get_max_seg_size( | |
1138 | host->dma->device->dev); | |
1139 | else | |
f53fbde4 | 1140 | dev_info(mmc_dev(host->mmc), "dma not available. Using PIO\n"); |
d96be879 | 1141 | |
d96be879 SH |
1142 | INIT_WORK(&host->datawork, mxcmci_datawork); |
1143 | ||
01e4f958 AS |
1144 | ret = devm_request_irq(&pdev->dev, irq, mxcmci_irq, 0, |
1145 | dev_name(&pdev->dev), host); | |
d96be879 SH |
1146 | if (ret) |
1147 | goto out_free_dma; | |
1148 | ||
1149 | platform_set_drvdata(pdev, mmc); | |
1150 | ||
1151 | if (host->pdata && host->pdata->init) { | |
1152 | ret = host->pdata->init(&pdev->dev, mxcmci_detect_irq, | |
1153 | host->mmc); | |
1154 | if (ret) | |
01e4f958 | 1155 | goto out_free_dma; |
d96be879 SH |
1156 | } |
1157 | ||
f6ad0a48 JM |
1158 | init_timer(&host->watchdog); |
1159 | host->watchdog.function = &mxcmci_watchdog; | |
1160 | host->watchdog.data = (unsigned long)mmc; | |
1161 | ||
abd4190f AS |
1162 | mmc_add_host(mmc); |
1163 | ||
d96be879 SH |
1164 | return 0; |
1165 | ||
d96be879 | 1166 | out_free_dma: |
f53fbde4 SH |
1167 | if (host->dma) |
1168 | dma_release_channel(host->dma); | |
01e4f958 | 1169 | |
d96be879 | 1170 | out_clk_put: |
529aa29e SH |
1171 | clk_disable_unprepare(host->clk_per); |
1172 | clk_disable_unprepare(host->clk_ipg); | |
01e4f958 | 1173 | |
d96be879 SH |
1174 | out_free: |
1175 | mmc_free_host(mmc); | |
01e4f958 | 1176 | |
d96be879 SH |
1177 | return ret; |
1178 | } | |
1179 | ||
1180 | static int mxcmci_remove(struct platform_device *pdev) | |
1181 | { | |
1182 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
1183 | struct mxcmci_host *host = mmc_priv(mmc); | |
1184 | ||
d96be879 SH |
1185 | mmc_remove_host(mmc); |
1186 | ||
1187 | if (host->pdata && host->pdata->exit) | |
1188 | host->pdata->exit(&pdev->dev, mmc); | |
1189 | ||
f53fbde4 SH |
1190 | if (host->dma) |
1191 | dma_release_channel(host->dma); | |
1192 | ||
529aa29e SH |
1193 | clk_disable_unprepare(host->clk_per); |
1194 | clk_disable_unprepare(host->clk_ipg); | |
d96be879 | 1195 | |
d96be879 SH |
1196 | mmc_free_host(mmc); |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
384a81d5 | 1201 | static int __maybe_unused mxcmci_suspend(struct device *dev) |
d96be879 | 1202 | { |
a7d403cf EB |
1203 | struct mmc_host *mmc = dev_get_drvdata(dev); |
1204 | struct mxcmci_host *host = mmc_priv(mmc); | |
d96be879 | 1205 | |
529aa29e SH |
1206 | clk_disable_unprepare(host->clk_per); |
1207 | clk_disable_unprepare(host->clk_ipg); | |
bd190f90 | 1208 | return 0; |
d96be879 SH |
1209 | } |
1210 | ||
384a81d5 | 1211 | static int __maybe_unused mxcmci_resume(struct device *dev) |
d96be879 | 1212 | { |
a7d403cf EB |
1213 | struct mmc_host *mmc = dev_get_drvdata(dev); |
1214 | struct mxcmci_host *host = mmc_priv(mmc); | |
d96be879 | 1215 | |
529aa29e SH |
1216 | clk_prepare_enable(host->clk_per); |
1217 | clk_prepare_enable(host->clk_ipg); | |
bd190f90 | 1218 | return 0; |
d96be879 | 1219 | } |
a7d403cf | 1220 | |
384a81d5 | 1221 | static SIMPLE_DEV_PM_OPS(mxcmci_pm_ops, mxcmci_suspend, mxcmci_resume); |
d96be879 SH |
1222 | |
1223 | static struct platform_driver mxcmci_driver = { | |
1224 | .probe = mxcmci_probe, | |
1225 | .remove = mxcmci_remove, | |
7f917a8d | 1226 | .id_table = mxcmci_devtype, |
d96be879 SH |
1227 | .driver = { |
1228 | .name = DRIVER_NAME, | |
a7d403cf | 1229 | .pm = &mxcmci_pm_ops, |
7ff747c4 | 1230 | .of_match_table = mxcmci_of_match, |
d96be879 SH |
1231 | } |
1232 | }; | |
1233 | ||
d1f81a64 | 1234 | module_platform_driver(mxcmci_driver); |
d96be879 SH |
1235 | |
1236 | MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); | |
1237 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | |
1238 | MODULE_LICENSE("GPL"); | |
6eb30adf | 1239 | MODULE_ALIAS("platform:mxc-mmc"); |