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Commit | Line | Data |
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1da177e4 | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/host/pxa.c - PXA MMCI driver |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 2003 Russell King, All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This hardware is really sick: | |
11 | * - No way to clear interrupts. | |
12 | * - Have to turn off the clock whenever we touch the device. | |
13 | * - Doesn't tell you how many data blocks were transferred. | |
14 | * Yuck! | |
15 | * | |
16 | * 1 and 3 byte data transfers not supported | |
17 | * max block length up to 1023 | |
18 | */ | |
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/init.h> | |
21 | #include <linux/ioport.h> | |
d052d1be | 22 | #include <linux/platform_device.h> |
1da177e4 LT |
23 | #include <linux/delay.h> |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/dma-mapping.h> | |
26 | #include <linux/mmc/host.h> | |
1da177e4 LT |
27 | |
28 | #include <asm/dma.h> | |
29 | #include <asm/io.h> | |
1da177e4 LT |
30 | #include <asm/scatterlist.h> |
31 | #include <asm/sizes.h> | |
32 | ||
33 | #include <asm/arch/pxa-regs.h> | |
34 | #include <asm/arch/mmc.h> | |
35 | ||
36 | #include "pxamci.h" | |
37 | ||
1da177e4 LT |
38 | #define DRIVER_NAME "pxa2xx-mci" |
39 | ||
40 | #define NR_SG 1 | |
41 | ||
42 | struct pxamci_host { | |
43 | struct mmc_host *mmc; | |
44 | spinlock_t lock; | |
45 | struct resource *res; | |
46 | void __iomem *base; | |
47 | int irq; | |
48 | int dma; | |
49 | unsigned int clkrt; | |
50 | unsigned int cmdat; | |
51 | unsigned int imask; | |
52 | unsigned int power_mode; | |
53 | struct pxamci_platform_data *pdata; | |
54 | ||
55 | struct mmc_request *mrq; | |
56 | struct mmc_command *cmd; | |
57 | struct mmc_data *data; | |
58 | ||
59 | dma_addr_t sg_dma; | |
60 | struct pxa_dma_desc *sg_cpu; | |
61 | unsigned int dma_len; | |
62 | ||
63 | unsigned int dma_dir; | |
64 | }; | |
65 | ||
1da177e4 LT |
66 | static void pxamci_stop_clock(struct pxamci_host *host) |
67 | { | |
68 | if (readl(host->base + MMC_STAT) & STAT_CLK_EN) { | |
69 | unsigned long timeout = 10000; | |
70 | unsigned int v; | |
71 | ||
72 | writel(STOP_CLOCK, host->base + MMC_STRPCL); | |
73 | ||
74 | do { | |
75 | v = readl(host->base + MMC_STAT); | |
76 | if (!(v & STAT_CLK_EN)) | |
77 | break; | |
78 | udelay(1); | |
79 | } while (timeout--); | |
80 | ||
81 | if (v & STAT_CLK_EN) | |
82 | dev_err(mmc_dev(host->mmc), "unable to stop clock\n"); | |
83 | } | |
84 | } | |
85 | ||
86 | static void pxamci_enable_irq(struct pxamci_host *host, unsigned int mask) | |
87 | { | |
88 | unsigned long flags; | |
89 | ||
90 | spin_lock_irqsave(&host->lock, flags); | |
91 | host->imask &= ~mask; | |
92 | writel(host->imask, host->base + MMC_I_MASK); | |
93 | spin_unlock_irqrestore(&host->lock, flags); | |
94 | } | |
95 | ||
96 | static void pxamci_disable_irq(struct pxamci_host *host, unsigned int mask) | |
97 | { | |
98 | unsigned long flags; | |
99 | ||
100 | spin_lock_irqsave(&host->lock, flags); | |
101 | host->imask |= mask; | |
102 | writel(host->imask, host->base + MMC_I_MASK); | |
103 | spin_unlock_irqrestore(&host->lock, flags); | |
104 | } | |
105 | ||
106 | static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data) | |
107 | { | |
108 | unsigned int nob = data->blocks; | |
3d63abe5 | 109 | unsigned long long clks; |
1da177e4 LT |
110 | unsigned int timeout; |
111 | u32 dcmd; | |
112 | int i; | |
113 | ||
114 | host->data = data; | |
115 | ||
116 | if (data->flags & MMC_DATA_STREAM) | |
117 | nob = 0xffff; | |
118 | ||
119 | writel(nob, host->base + MMC_NOB); | |
2c171bf1 | 120 | writel(data->blksz, host->base + MMC_BLKLEN); |
1da177e4 | 121 | |
3d63abe5 RK |
122 | clks = (unsigned long long)data->timeout_ns * CLOCKRATE; |
123 | do_div(clks, 1000000000UL); | |
124 | timeout = (unsigned int)clks + (data->timeout_clks << host->clkrt); | |
1da177e4 LT |
125 | writel((timeout + 255) / 256, host->base + MMC_RDTO); |
126 | ||
127 | if (data->flags & MMC_DATA_READ) { | |
128 | host->dma_dir = DMA_FROM_DEVICE; | |
129 | dcmd = DCMD_INCTRGADDR | DCMD_FLOWTRG; | |
130 | DRCMRTXMMC = 0; | |
131 | DRCMRRXMMC = host->dma | DRCMR_MAPVLD; | |
132 | } else { | |
133 | host->dma_dir = DMA_TO_DEVICE; | |
134 | dcmd = DCMD_INCSRCADDR | DCMD_FLOWSRC; | |
135 | DRCMRRXMMC = 0; | |
136 | DRCMRTXMMC = host->dma | DRCMR_MAPVLD; | |
137 | } | |
138 | ||
139 | dcmd |= DCMD_BURST32 | DCMD_WIDTH1; | |
140 | ||
141 | host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
142 | host->dma_dir); | |
143 | ||
144 | for (i = 0; i < host->dma_len; i++) { | |
145 | if (data->flags & MMC_DATA_READ) { | |
146 | host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO; | |
147 | host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]); | |
148 | } else { | |
149 | host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]); | |
150 | host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO; | |
151 | } | |
152 | host->sg_cpu[i].dcmd = dcmd | sg_dma_len(&data->sg[i]); | |
153 | host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) * | |
154 | sizeof(struct pxa_dma_desc); | |
155 | } | |
156 | host->sg_cpu[host->dma_len - 1].ddadr = DDADR_STOP; | |
157 | wmb(); | |
158 | ||
159 | DDADR(host->dma) = host->sg_dma; | |
160 | DCSR(host->dma) = DCSR_RUN; | |
161 | } | |
162 | ||
163 | static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd, unsigned int cmdat) | |
164 | { | |
165 | WARN_ON(host->cmd != NULL); | |
166 | host->cmd = cmd; | |
167 | ||
168 | if (cmd->flags & MMC_RSP_BUSY) | |
169 | cmdat |= CMDAT_BUSY; | |
170 | ||
e9225176 RK |
171 | #define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE)) |
172 | switch (RSP_TYPE(mmc_resp_type(cmd))) { | |
6f949909 | 173 | case RSP_TYPE(MMC_RSP_R1): /* r1, r1b, r6, r7 */ |
1da177e4 LT |
174 | cmdat |= CMDAT_RESP_SHORT; |
175 | break; | |
e9225176 | 176 | case RSP_TYPE(MMC_RSP_R3): |
1da177e4 LT |
177 | cmdat |= CMDAT_RESP_R3; |
178 | break; | |
e9225176 | 179 | case RSP_TYPE(MMC_RSP_R2): |
1da177e4 LT |
180 | cmdat |= CMDAT_RESP_R2; |
181 | break; | |
182 | default: | |
183 | break; | |
184 | } | |
185 | ||
186 | writel(cmd->opcode, host->base + MMC_CMD); | |
187 | writel(cmd->arg >> 16, host->base + MMC_ARGH); | |
188 | writel(cmd->arg & 0xffff, host->base + MMC_ARGL); | |
189 | writel(cmdat, host->base + MMC_CMDAT); | |
190 | writel(host->clkrt, host->base + MMC_CLKRT); | |
191 | ||
192 | writel(START_CLOCK, host->base + MMC_STRPCL); | |
193 | ||
194 | pxamci_enable_irq(host, END_CMD_RES); | |
195 | } | |
196 | ||
197 | static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq) | |
198 | { | |
1da177e4 LT |
199 | host->mrq = NULL; |
200 | host->cmd = NULL; | |
201 | host->data = NULL; | |
202 | mmc_request_done(host->mmc, mrq); | |
203 | } | |
204 | ||
205 | static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat) | |
206 | { | |
207 | struct mmc_command *cmd = host->cmd; | |
208 | int i; | |
209 | u32 v; | |
210 | ||
211 | if (!cmd) | |
212 | return 0; | |
213 | ||
214 | host->cmd = NULL; | |
215 | ||
216 | /* | |
217 | * Did I mention this is Sick. We always need to | |
218 | * discard the upper 8 bits of the first 16-bit word. | |
219 | */ | |
220 | v = readl(host->base + MMC_RES) & 0xffff; | |
221 | for (i = 0; i < 4; i++) { | |
222 | u32 w1 = readl(host->base + MMC_RES) & 0xffff; | |
223 | u32 w2 = readl(host->base + MMC_RES) & 0xffff; | |
224 | cmd->resp[i] = v << 24 | w1 << 8 | w2 >> 8; | |
225 | v = w2; | |
226 | } | |
227 | ||
228 | if (stat & STAT_TIME_OUT_RESPONSE) { | |
17b0429d | 229 | cmd->error = -ETIMEDOUT; |
1da177e4 LT |
230 | } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) { |
231 | #ifdef CONFIG_PXA27x | |
232 | /* | |
233 | * workaround for erratum #42: | |
234 | * Intel PXA27x Family Processor Specification Update Rev 001 | |
90e07d9f NP |
235 | * A bogus CRC error can appear if the msb of a 136 bit |
236 | * response is a one. | |
1da177e4 | 237 | */ |
90e07d9f NP |
238 | if (cmd->flags & MMC_RSP_136 && cmd->resp[0] & 0x80000000) { |
239 | pr_debug("ignoring CRC from command %d - *risky*\n", cmd->opcode); | |
240 | } else | |
1da177e4 | 241 | #endif |
17b0429d | 242 | cmd->error = -EILSEQ; |
1da177e4 LT |
243 | } |
244 | ||
245 | pxamci_disable_irq(host, END_CMD_RES); | |
17b0429d | 246 | if (host->data && !cmd->error) { |
1da177e4 LT |
247 | pxamci_enable_irq(host, DATA_TRAN_DONE); |
248 | } else { | |
249 | pxamci_finish_request(host, host->mrq); | |
250 | } | |
251 | ||
252 | return 1; | |
253 | } | |
254 | ||
255 | static int pxamci_data_done(struct pxamci_host *host, unsigned int stat) | |
256 | { | |
257 | struct mmc_data *data = host->data; | |
258 | ||
259 | if (!data) | |
260 | return 0; | |
261 | ||
262 | DCSR(host->dma) = 0; | |
263 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_len, | |
264 | host->dma_dir); | |
265 | ||
266 | if (stat & STAT_READ_TIME_OUT) | |
17b0429d | 267 | data->error = -ETIMEDOUT; |
1da177e4 | 268 | else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR)) |
17b0429d | 269 | data->error = -EILSEQ; |
1da177e4 LT |
270 | |
271 | /* | |
272 | * There appears to be a hardware design bug here. There seems to | |
273 | * be no way to find out how much data was transferred to the card. | |
274 | * This means that if there was an error on any block, we mark all | |
275 | * data blocks as being in error. | |
276 | */ | |
17b0429d | 277 | if (!data->error) |
2c171bf1 | 278 | data->bytes_xfered = data->blocks * data->blksz; |
1da177e4 LT |
279 | else |
280 | data->bytes_xfered = 0; | |
281 | ||
282 | pxamci_disable_irq(host, DATA_TRAN_DONE); | |
283 | ||
284 | host->data = NULL; | |
58741e8b | 285 | if (host->mrq->stop) { |
1da177e4 | 286 | pxamci_stop_clock(host); |
df456f47 | 287 | pxamci_start_cmd(host, host->mrq->stop, host->cmdat); |
1da177e4 LT |
288 | } else { |
289 | pxamci_finish_request(host, host->mrq); | |
290 | } | |
291 | ||
292 | return 1; | |
293 | } | |
294 | ||
7d12e780 | 295 | static irqreturn_t pxamci_irq(int irq, void *devid) |
1da177e4 LT |
296 | { |
297 | struct pxamci_host *host = devid; | |
298 | unsigned int ireg; | |
299 | int handled = 0; | |
300 | ||
81ab570f | 301 | ireg = readl(host->base + MMC_I_REG) & ~readl(host->base + MMC_I_MASK); |
1da177e4 | 302 | |
1da177e4 LT |
303 | if (ireg) { |
304 | unsigned stat = readl(host->base + MMC_STAT); | |
305 | ||
d78e9079 | 306 | pr_debug("PXAMCI: irq %08x stat %08x\n", ireg, stat); |
1da177e4 LT |
307 | |
308 | if (ireg & END_CMD_RES) | |
309 | handled |= pxamci_cmd_done(host, stat); | |
310 | if (ireg & DATA_TRAN_DONE) | |
311 | handled |= pxamci_data_done(host, stat); | |
312 | } | |
313 | ||
314 | return IRQ_RETVAL(handled); | |
315 | } | |
316 | ||
317 | static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
318 | { | |
319 | struct pxamci_host *host = mmc_priv(mmc); | |
320 | unsigned int cmdat; | |
321 | ||
322 | WARN_ON(host->mrq != NULL); | |
323 | ||
324 | host->mrq = mrq; | |
325 | ||
326 | pxamci_stop_clock(host); | |
327 | ||
328 | cmdat = host->cmdat; | |
329 | host->cmdat &= ~CMDAT_INIT; | |
330 | ||
331 | if (mrq->data) { | |
332 | pxamci_setup_data(host, mrq->data); | |
333 | ||
334 | cmdat &= ~CMDAT_BUSY; | |
335 | cmdat |= CMDAT_DATAEN | CMDAT_DMAEN; | |
336 | if (mrq->data->flags & MMC_DATA_WRITE) | |
337 | cmdat |= CMDAT_WRITE; | |
338 | ||
339 | if (mrq->data->flags & MMC_DATA_STREAM) | |
340 | cmdat |= CMDAT_STREAM; | |
341 | } | |
342 | ||
343 | pxamci_start_cmd(host, mrq->cmd, cmdat); | |
344 | } | |
345 | ||
e619524f RP |
346 | static int pxamci_get_ro(struct mmc_host *mmc) |
347 | { | |
348 | struct pxamci_host *host = mmc_priv(mmc); | |
349 | ||
350 | if (host->pdata && host->pdata->get_ro) | |
9e86619b | 351 | return host->pdata->get_ro(mmc_dev(mmc)); |
e619524f RP |
352 | /* Host doesn't support read only detection so assume writeable */ |
353 | return 0; | |
354 | } | |
355 | ||
1da177e4 LT |
356 | static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
357 | { | |
358 | struct pxamci_host *host = mmc_priv(mmc); | |
359 | ||
1da177e4 LT |
360 | if (ios->clock) { |
361 | unsigned int clk = CLOCKRATE / ios->clock; | |
362 | if (CLOCKRATE / clk > ios->clock) | |
363 | clk <<= 1; | |
364 | host->clkrt = fls(clk) - 1; | |
7053acbd | 365 | pxa_set_cken(CKEN_MMC, 1); |
1da177e4 LT |
366 | |
367 | /* | |
368 | * we write clkrt on the next command | |
369 | */ | |
370 | } else { | |
371 | pxamci_stop_clock(host); | |
7053acbd | 372 | pxa_set_cken(CKEN_MMC, 0); |
1da177e4 LT |
373 | } |
374 | ||
375 | if (host->power_mode != ios->power_mode) { | |
376 | host->power_mode = ios->power_mode; | |
377 | ||
378 | if (host->pdata && host->pdata->setpower) | |
9e86619b | 379 | host->pdata->setpower(mmc_dev(mmc), ios->vdd); |
1da177e4 LT |
380 | |
381 | if (ios->power_mode == MMC_POWER_ON) | |
382 | host->cmdat |= CMDAT_INIT; | |
383 | } | |
384 | ||
df456f47 BW |
385 | if (ios->bus_width == MMC_BUS_WIDTH_4) |
386 | host->cmdat |= CMDAT_SD_4DAT; | |
387 | else | |
388 | host->cmdat &= ~CMDAT_SD_4DAT; | |
389 | ||
d78e9079 | 390 | pr_debug("PXAMCI: clkrt = %x cmdat = %x\n", |
c6563178 | 391 | host->clkrt, host->cmdat); |
1da177e4 LT |
392 | } |
393 | ||
ab7aefd0 | 394 | static const struct mmc_host_ops pxamci_ops = { |
1da177e4 | 395 | .request = pxamci_request, |
e619524f | 396 | .get_ro = pxamci_get_ro, |
1da177e4 LT |
397 | .set_ios = pxamci_set_ios, |
398 | }; | |
399 | ||
7d12e780 | 400 | static void pxamci_dma_irq(int dma, void *devid) |
1da177e4 LT |
401 | { |
402 | printk(KERN_ERR "DMA%d: IRQ???\n", dma); | |
403 | DCSR(dma) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; | |
404 | } | |
405 | ||
7d12e780 | 406 | static irqreturn_t pxamci_detect_irq(int irq, void *devid) |
1da177e4 | 407 | { |
c26971cb RP |
408 | struct pxamci_host *host = mmc_priv(devid); |
409 | ||
410 | mmc_detect_change(devid, host->pdata->detect_delay); | |
1da177e4 LT |
411 | return IRQ_HANDLED; |
412 | } | |
413 | ||
3ae5eaec | 414 | static int pxamci_probe(struct platform_device *pdev) |
1da177e4 | 415 | { |
1da177e4 LT |
416 | struct mmc_host *mmc; |
417 | struct pxamci_host *host = NULL; | |
418 | struct resource *r; | |
419 | int ret, irq; | |
420 | ||
421 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
422 | irq = platform_get_irq(pdev, 0); | |
48944738 | 423 | if (!r || irq < 0) |
1da177e4 LT |
424 | return -ENXIO; |
425 | ||
426 | r = request_mem_region(r->start, SZ_4K, DRIVER_NAME); | |
427 | if (!r) | |
428 | return -EBUSY; | |
429 | ||
3ae5eaec | 430 | mmc = mmc_alloc_host(sizeof(struct pxamci_host), &pdev->dev); |
1da177e4 LT |
431 | if (!mmc) { |
432 | ret = -ENOMEM; | |
433 | goto out; | |
434 | } | |
435 | ||
436 | mmc->ops = &pxamci_ops; | |
437 | mmc->f_min = CLOCKRATE_MIN; | |
438 | mmc->f_max = CLOCKRATE_MAX; | |
439 | ||
440 | /* | |
441 | * We can do SG-DMA, but we don't because we never know how much | |
442 | * data we successfully wrote to the card. | |
443 | */ | |
444 | mmc->max_phys_segs = NR_SG; | |
445 | ||
446 | /* | |
447 | * Our hardware DMA can handle a maximum of one page per SG entry. | |
448 | */ | |
449 | mmc->max_seg_size = PAGE_SIZE; | |
450 | ||
fe4a3c7a | 451 | /* |
fe2dc44e | 452 | * Block length register is only 10 bits before PXA27x. |
fe4a3c7a | 453 | */ |
fe2dc44e | 454 | mmc->max_blk_size = (cpu_is_pxa21x() || cpu_is_pxa25x()) ? 1023 : 2048; |
fe4a3c7a | 455 | |
55db890a PO |
456 | /* |
457 | * Block count register is 16 bits. | |
458 | */ | |
459 | mmc->max_blk_count = 65535; | |
460 | ||
1da177e4 LT |
461 | host = mmc_priv(mmc); |
462 | host->mmc = mmc; | |
463 | host->dma = -1; | |
464 | host->pdata = pdev->dev.platform_data; | |
465 | mmc->ocr_avail = host->pdata ? | |
466 | host->pdata->ocr_mask : | |
467 | MMC_VDD_32_33|MMC_VDD_33_34; | |
df456f47 BW |
468 | mmc->caps = 0; |
469 | if (!cpu_is_pxa21x() && !cpu_is_pxa25x()) | |
470 | mmc->caps |= MMC_CAP_4_BIT_DATA; | |
1da177e4 | 471 | |
3ae5eaec | 472 | host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL); |
1da177e4 LT |
473 | if (!host->sg_cpu) { |
474 | ret = -ENOMEM; | |
475 | goto out; | |
476 | } | |
477 | ||
478 | spin_lock_init(&host->lock); | |
479 | host->res = r; | |
480 | host->irq = irq; | |
481 | host->imask = MMC_I_MASK_ALL; | |
482 | ||
483 | host->base = ioremap(r->start, SZ_4K); | |
484 | if (!host->base) { | |
485 | ret = -ENOMEM; | |
486 | goto out; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Ensure that the host controller is shut down, and setup | |
491 | * with our defaults. | |
492 | */ | |
493 | pxamci_stop_clock(host); | |
494 | writel(0, host->base + MMC_SPI); | |
495 | writel(64, host->base + MMC_RESTO); | |
496 | writel(host->imask, host->base + MMC_I_MASK); | |
497 | ||
498 | host->dma = pxa_request_dma(DRIVER_NAME, DMA_PRIO_LOW, | |
499 | pxamci_dma_irq, host); | |
500 | if (host->dma < 0) { | |
501 | ret = -EBUSY; | |
502 | goto out; | |
503 | } | |
504 | ||
505 | ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host); | |
506 | if (ret) | |
507 | goto out; | |
508 | ||
3ae5eaec | 509 | platform_set_drvdata(pdev, mmc); |
1da177e4 LT |
510 | |
511 | if (host->pdata && host->pdata->init) | |
3ae5eaec | 512 | host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc); |
1da177e4 LT |
513 | |
514 | mmc_add_host(mmc); | |
515 | ||
516 | return 0; | |
517 | ||
518 | out: | |
519 | if (host) { | |
520 | if (host->dma >= 0) | |
521 | pxa_free_dma(host->dma); | |
522 | if (host->base) | |
523 | iounmap(host->base); | |
524 | if (host->sg_cpu) | |
3ae5eaec | 525 | dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); |
1da177e4 LT |
526 | } |
527 | if (mmc) | |
528 | mmc_free_host(mmc); | |
529 | release_resource(r); | |
530 | return ret; | |
531 | } | |
532 | ||
3ae5eaec | 533 | static int pxamci_remove(struct platform_device *pdev) |
1da177e4 | 534 | { |
3ae5eaec | 535 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
1da177e4 | 536 | |
3ae5eaec | 537 | platform_set_drvdata(pdev, NULL); |
1da177e4 LT |
538 | |
539 | if (mmc) { | |
540 | struct pxamci_host *host = mmc_priv(mmc); | |
541 | ||
542 | if (host->pdata && host->pdata->exit) | |
3ae5eaec | 543 | host->pdata->exit(&pdev->dev, mmc); |
1da177e4 LT |
544 | |
545 | mmc_remove_host(mmc); | |
546 | ||
547 | pxamci_stop_clock(host); | |
548 | writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD| | |
549 | END_CMD_RES|PRG_DONE|DATA_TRAN_DONE, | |
550 | host->base + MMC_I_MASK); | |
551 | ||
552 | DRCMRRXMMC = 0; | |
553 | DRCMRTXMMC = 0; | |
554 | ||
555 | free_irq(host->irq, host); | |
556 | pxa_free_dma(host->dma); | |
557 | iounmap(host->base); | |
3ae5eaec | 558 | dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); |
1da177e4 LT |
559 | |
560 | release_resource(host->res); | |
561 | ||
562 | mmc_free_host(mmc); | |
563 | } | |
564 | return 0; | |
565 | } | |
566 | ||
567 | #ifdef CONFIG_PM | |
3ae5eaec | 568 | static int pxamci_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 569 | { |
3ae5eaec | 570 | struct mmc_host *mmc = platform_get_drvdata(dev); |
1da177e4 LT |
571 | int ret = 0; |
572 | ||
9480e307 | 573 | if (mmc) |
1da177e4 LT |
574 | ret = mmc_suspend_host(mmc, state); |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
3ae5eaec | 579 | static int pxamci_resume(struct platform_device *dev) |
1da177e4 | 580 | { |
3ae5eaec | 581 | struct mmc_host *mmc = platform_get_drvdata(dev); |
1da177e4 LT |
582 | int ret = 0; |
583 | ||
9480e307 | 584 | if (mmc) |
1da177e4 LT |
585 | ret = mmc_resume_host(mmc); |
586 | ||
587 | return ret; | |
588 | } | |
589 | #else | |
590 | #define pxamci_suspend NULL | |
591 | #define pxamci_resume NULL | |
592 | #endif | |
593 | ||
3ae5eaec | 594 | static struct platform_driver pxamci_driver = { |
1da177e4 LT |
595 | .probe = pxamci_probe, |
596 | .remove = pxamci_remove, | |
597 | .suspend = pxamci_suspend, | |
598 | .resume = pxamci_resume, | |
3ae5eaec RK |
599 | .driver = { |
600 | .name = DRIVER_NAME, | |
601 | }, | |
1da177e4 LT |
602 | }; |
603 | ||
604 | static int __init pxamci_init(void) | |
605 | { | |
3ae5eaec | 606 | return platform_driver_register(&pxamci_driver); |
1da177e4 LT |
607 | } |
608 | ||
609 | static void __exit pxamci_exit(void) | |
610 | { | |
3ae5eaec | 611 | platform_driver_unregister(&pxamci_driver); |
1da177e4 LT |
612 | } |
613 | ||
614 | module_init(pxamci_init); | |
615 | module_exit(pxamci_exit); | |
616 | ||
617 | MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver"); | |
618 | MODULE_LICENSE("GPL"); |