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Full support for Ginger Console
[linux-ginger.git] / drivers / mmc / host / pxamci.c
blobb00d6731905826864abf43a762910899087a3887
1 /*
2 * linux/drivers/mmc/host/pxa.c - PXA MMCI driver
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 */
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/platform_device.h>
23 #include <linux/delay.h>
24 #include <linux/interrupt.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/clk.h>
27 #include <linux/err.h>
28 #include <linux/mmc/host.h>
29 #include <linux/io.h>
30 #include <linux/regulator/consumer.h>
31 #include <linux/gpio.h>
32
33 #include <asm/sizes.h>
34
35 #include <mach/hardware.h>
36 #include <mach/dma.h>
37 #include <mach/mmc.h>
38
39 #include "pxamci.h"
40
41 #define DRIVER_NAME "pxa2xx-mci"
42
43 #define NR_SG 1
44 #define CLKRT_OFF (~0)
45
46 struct pxamci_host {
47 struct mmc_host *mmc;
48 spinlock_t lock;
49 struct resource *res;
50 void __iomem *base;
51 struct clk *clk;
52 unsigned long clkrate;
53 int irq;
54 int dma;
55 unsigned int clkrt;
56 unsigned int cmdat;
57 unsigned int imask;
58 unsigned int power_mode;
59 struct pxamci_platform_data *pdata;
60
61 struct mmc_request *mrq;
62 struct mmc_command *cmd;
63 struct mmc_data *data;
64
65 dma_addr_t sg_dma;
66 struct pxa_dma_desc *sg_cpu;
67 unsigned int dma_len;
68
69 unsigned int dma_dir;
70 unsigned int dma_drcmrrx;
71 unsigned int dma_drcmrtx;
72
73 struct regulator *vcc;
74 };
75
76 static inline void pxamci_init_ocr(struct pxamci_host *host)
77 {
78 #ifdef CONFIG_REGULATOR
79 host->vcc = regulator_get(mmc_dev(host->mmc), "vmmc");
80
81 if (IS_ERR(host->vcc))
82 host->vcc = NULL;
83 else {
84 host->mmc->ocr_avail = mmc_regulator_get_ocrmask(host->vcc);
85 if (host->pdata && host->pdata->ocr_mask)
86 dev_warn(mmc_dev(host->mmc),
87 "ocr_mask/setpower will not be used\n");
88 }
89 #endif
90 if (host->vcc == NULL) {
91 /* fall-back to platform data */
92 host->mmc->ocr_avail = host->pdata ?
93 host->pdata->ocr_mask :
94 MMC_VDD_32_33 | MMC_VDD_33_34;
95 }
96 }
97
98 static inline void pxamci_set_power(struct pxamci_host *host, unsigned int vdd)
99 {
100 int on;
101
102 #ifdef CONFIG_REGULATOR
103 if (host->vcc)
104 mmc_regulator_set_ocr(host->vcc, vdd);
105 #endif
106 if (!host->vcc && host->pdata &&
107 gpio_is_valid(host->pdata->gpio_power)) {
108 on = ((1 << vdd) & host->pdata->ocr_mask);
109 gpio_set_value(host->pdata->gpio_power,
110 !!on ^ host->pdata->gpio_power_invert);
111 }
112 if (!host->vcc && host->pdata && host->pdata->setpower)
113 host->pdata->setpower(mmc_dev(host->mmc), vdd);
114 }
115
116 static void pxamci_stop_clock(struct pxamci_host *host)
117 {
118 if (readl(host->base + MMC_STAT) & STAT_CLK_EN) {
119 unsigned long timeout = 10000;
120 unsigned int v;
121
122 writel(STOP_CLOCK, host->base + MMC_STRPCL);
123
124 do {
125 v = readl(host->base + MMC_STAT);
126 if (!(v & STAT_CLK_EN))
127 break;
128 udelay(1);
129 } while (timeout--);
130
131 if (v & STAT_CLK_EN)
132 dev_err(mmc_dev(host->mmc), "unable to stop clock\n");
133 }
134 }
135
136 static void pxamci_enable_irq(struct pxamci_host *host, unsigned int mask)
137 {
138 unsigned long flags;
139
140 spin_lock_irqsave(&host->lock, flags);
141 host->imask &= ~mask;
142 writel(host->imask, host->base + MMC_I_MASK);
143 spin_unlock_irqrestore(&host->lock, flags);
144 }
145
146 static void pxamci_disable_irq(struct pxamci_host *host, unsigned int mask)
147 {
148 unsigned long flags;
149
150 spin_lock_irqsave(&host->lock, flags);
151 host->imask |= mask;
152 writel(host->imask, host->base + MMC_I_MASK);
153 spin_unlock_irqrestore(&host->lock, flags);
154 }
155
156 static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
157 {
158 unsigned int nob = data->blocks;
159 unsigned long long clks;
160 unsigned int timeout;
161 bool dalgn = 0;
162 u32 dcmd;
163 int i;
164
165 host->data = data;
166
167 if (data->flags & MMC_DATA_STREAM)
168 nob = 0xffff;
169
170 writel(nob, host->base + MMC_NOB);
171 writel(data->blksz, host->base + MMC_BLKLEN);
172
173 clks = (unsigned long long)data->timeout_ns * host->clkrate;
174 do_div(clks, 1000000000UL);
175 timeout = (unsigned int)clks + (data->timeout_clks << host->clkrt);
176 writel((timeout + 255) / 256, host->base + MMC_RDTO);
177
178 if (data->flags & MMC_DATA_READ) {
179 host->dma_dir = DMA_FROM_DEVICE;
180 dcmd = DCMD_INCTRGADDR | DCMD_FLOWSRC;
181 DRCMR(host->dma_drcmrtx) = 0;
182 DRCMR(host->dma_drcmrrx) = host->dma | DRCMR_MAPVLD;
183 } else {
184 host->dma_dir = DMA_TO_DEVICE;
185 dcmd = DCMD_INCSRCADDR | DCMD_FLOWTRG;
186 DRCMR(host->dma_drcmrrx) = 0;
187 DRCMR(host->dma_drcmrtx) = host->dma | DRCMR_MAPVLD;
188 }
189
190 dcmd |= DCMD_BURST32 | DCMD_WIDTH1;
191
192 host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
193 host->dma_dir);
194
195 for (i = 0; i < host->dma_len; i++) {
196 unsigned int length = sg_dma_len(&data->sg[i]);
197 host->sg_cpu[i].dcmd = dcmd | length;
198 if (length & 31 && !(data->flags & MMC_DATA_READ))
199 host->sg_cpu[i].dcmd |= DCMD_ENDIRQEN;
200 /* Not aligned to 8-byte boundary? */
201 if (sg_dma_address(&data->sg[i]) & 0x7)
202 dalgn = 1;
203 if (data->flags & MMC_DATA_READ) {
204 host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO;
205 host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]);
206 } else {
207 host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]);
208 host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO;
209 }
210 host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) *
211 sizeof(struct pxa_dma_desc);
212 }
213 host->sg_cpu[host->dma_len - 1].ddadr = DDADR_STOP;
214 wmb();
215
216 /*
217 * The PXA27x DMA controller encounters overhead when working with
218 * unaligned (to 8-byte boundaries) data, so switch on byte alignment
219 * mode only if we have unaligned data.
220 */
221 if (dalgn)
222 DALGN |= (1 << host->dma);
223 else
224 DALGN &= ~(1 << host->dma);
225 DDADR(host->dma) = host->sg_dma;
226
227 /*
228 * workaround for erratum #91:
229 * only start DMA now if we are doing a read,
230 * otherwise we wait until CMD/RESP has finished
231 * before starting DMA.
232 */
233 if (!cpu_is_pxa27x() || data->flags & MMC_DATA_READ)
234 DCSR(host->dma) = DCSR_RUN;
235 }
236
237 static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd, unsigned int cmdat)
238 {
239 WARN_ON(host->cmd != NULL);
240 host->cmd = cmd;
241
242 if (cmd->flags & MMC_RSP_BUSY)
243 cmdat |= CMDAT_BUSY;
244
245 #define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
246 switch (RSP_TYPE(mmc_resp_type(cmd))) {
247 case RSP_TYPE(MMC_RSP_R1): /* r1, r1b, r6, r7 */
248 cmdat |= CMDAT_RESP_SHORT;
249 break;
250 case RSP_TYPE(MMC_RSP_R3):
251 cmdat |= CMDAT_RESP_R3;
252 break;
253 case RSP_TYPE(MMC_RSP_R2):
254 cmdat |= CMDAT_RESP_R2;
255 break;
256 default:
257 break;
258 }
259
260 writel(cmd->opcode, host->base + MMC_CMD);
261 writel(cmd->arg >> 16, host->base + MMC_ARGH);
262 writel(cmd->arg & 0xffff, host->base + MMC_ARGL);
263 writel(cmdat, host->base + MMC_CMDAT);
264 writel(host->clkrt, host->base + MMC_CLKRT);
265
266 writel(START_CLOCK, host->base + MMC_STRPCL);
267
268 pxamci_enable_irq(host, END_CMD_RES);
269 }
270
271 static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq)
272 {
273 host->mrq = NULL;
274 host->cmd = NULL;
275 host->data = NULL;
276 mmc_request_done(host->mmc, mrq);
277 }
278
279 static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
280 {
281 struct mmc_command *cmd = host->cmd;
282 int i;
283 u32 v;
284
285 if (!cmd)
286 return 0;
287
288 host->cmd = NULL;
289
290 /*
291 * Did I mention this is Sick. We always need to
292 * discard the upper 8 bits of the first 16-bit word.
293 */
294 v = readl(host->base + MMC_RES) & 0xffff;
295 for (i = 0; i < 4; i++) {
296 u32 w1 = readl(host->base + MMC_RES) & 0xffff;
297 u32 w2 = readl(host->base + MMC_RES) & 0xffff;
298 cmd->resp[i] = v << 24 | w1 << 8 | w2 >> 8;
299 v = w2;
300 }
301
302 if (stat & STAT_TIME_OUT_RESPONSE) {
303 cmd->error = -ETIMEDOUT;
304 } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) {
305 /*
306 * workaround for erratum #42:
307 * Intel PXA27x Family Processor Specification Update Rev 001
308 * A bogus CRC error can appear if the msb of a 136 bit
309 * response is a one.
310 */
311 if (cpu_is_pxa27x() &&
312 (cmd->flags & MMC_RSP_136 && cmd->resp[0] & 0x80000000))
313 pr_debug("ignoring CRC from command %d - *risky*\n", cmd->opcode);
314 else
315 cmd->error = -EILSEQ;
316 }
317
318 pxamci_disable_irq(host, END_CMD_RES);
319 if (host->data && !cmd->error) {
320 pxamci_enable_irq(host, DATA_TRAN_DONE);
321 /*
322 * workaround for erratum #91, if doing write
323 * enable DMA late
324 */
325 if (cpu_is_pxa27x() && host->data->flags & MMC_DATA_WRITE)
326 DCSR(host->dma) = DCSR_RUN;
327 } else {
328 pxamci_finish_request(host, host->mrq);
329 }
330
331 return 1;
332 }
333
334 static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
335 {
336 struct mmc_data *data = host->data;
337
338 if (!data)
339 return 0;
340
341 DCSR(host->dma) = 0;
342 dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
343 host->dma_dir);
344
345 if (stat & STAT_READ_TIME_OUT)
346 data->error = -ETIMEDOUT;
347 else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR))
348 data->error = -EILSEQ;
349
350 /*
351 * There appears to be a hardware design bug here. There seems to
352 * be no way to find out how much data was transferred to the card.
353 * This means that if there was an error on any block, we mark all
354 * data blocks as being in error.
355 */
356 if (!data->error)
357 data->bytes_xfered = data->blocks * data->blksz;
358 else
359 data->bytes_xfered = 0;
360
361 pxamci_disable_irq(host, DATA_TRAN_DONE);
362
363 host->data = NULL;
364 if (host->mrq->stop) {
365 pxamci_stop_clock(host);
366 pxamci_start_cmd(host, host->mrq->stop, host->cmdat);
367 } else {
368 pxamci_finish_request(host, host->mrq);
369 }
370
371 return 1;
372 }
373
374 static irqreturn_t pxamci_irq(int irq, void *devid)
375 {
376 struct pxamci_host *host = devid;
377 unsigned int ireg;
378 int handled = 0;
379
380 ireg = readl(host->base + MMC_I_REG) & ~readl(host->base + MMC_I_MASK);
381
382 if (ireg) {
383 unsigned stat = readl(host->base + MMC_STAT);
384
385 pr_debug("PXAMCI: irq %08x stat %08x\n", ireg, stat);
386
387 if (ireg & END_CMD_RES)
388 handled |= pxamci_cmd_done(host, stat);
389 if (ireg & DATA_TRAN_DONE)
390 handled |= pxamci_data_done(host, stat);
391 if (ireg & SDIO_INT) {
392 mmc_signal_sdio_irq(host->mmc);
393 handled = 1;
394 }
395 }
396
397 return IRQ_RETVAL(handled);
398 }
399
400 static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq)
401 {
402 struct pxamci_host *host = mmc_priv(mmc);
403 unsigned int cmdat;
404
405 WARN_ON(host->mrq != NULL);
406
407 host->mrq = mrq;
408
409 pxamci_stop_clock(host);
410
411 cmdat = host->cmdat;
412 host->cmdat &= ~CMDAT_INIT;
413
414 if (mrq->data) {
415 pxamci_setup_data(host, mrq->data);
416
417 cmdat &= ~CMDAT_BUSY;
418 cmdat |= CMDAT_DATAEN | CMDAT_DMAEN;
419 if (mrq->data->flags & MMC_DATA_WRITE)
420 cmdat |= CMDAT_WRITE;
421
422 if (mrq->data->flags & MMC_DATA_STREAM)
423 cmdat |= CMDAT_STREAM;
424 }
425
426 pxamci_start_cmd(host, mrq->cmd, cmdat);
427 }
428
429 static int pxamci_get_ro(struct mmc_host *mmc)
430 {
431 struct pxamci_host *host = mmc_priv(mmc);
432
433 if (host->pdata && gpio_is_valid(host->pdata->gpio_card_ro)) {
434 if (host->pdata->gpio_card_ro_invert)
435 return !gpio_get_value(host->pdata->gpio_card_ro);
436 else
437 return gpio_get_value(host->pdata->gpio_card_ro);
438 }
439 if (host->pdata && host->pdata->get_ro)
440 return !!host->pdata->get_ro(mmc_dev(mmc));
441 /*
442 * Board doesn't support read only detection; let the mmc core
443 * decide what to do.
444 */
445 return -ENOSYS;
446 }
447
448 static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
449 {
450 struct pxamci_host *host = mmc_priv(mmc);
451
452 if (ios->clock) {
453 unsigned long rate = host->clkrate;
454 unsigned int clk = rate / ios->clock;
455
456 if (host->clkrt == CLKRT_OFF)
457 clk_enable(host->clk);
458
459 if (ios->clock == 26000000) {
460 /* to support 26MHz on pxa300/pxa310 */
461 host->clkrt = 7;
462 } else {
463 /* to handle (19.5MHz, 26MHz) */
464 if (!clk)
465 clk = 1;
466
467 /*
468 * clk might result in a lower divisor than we
469 * desire. check for that condition and adjust
470 * as appropriate.
471 */
472 if (rate / clk > ios->clock)
473 clk <<= 1;
474 host->clkrt = fls(clk) - 1;
475 }
476
477 /*
478 * we write clkrt on the next command
479 */
480 } else {
481 pxamci_stop_clock(host);
482 if (host->clkrt != CLKRT_OFF) {
483 host->clkrt = CLKRT_OFF;
484 clk_disable(host->clk);
485 }
486 }
487
488 if (host->power_mode != ios->power_mode) {
489 host->power_mode = ios->power_mode;
490
491 pxamci_set_power(host, ios->vdd);
492
493 if (ios->power_mode == MMC_POWER_ON)
494 host->cmdat |= CMDAT_INIT;
495 }
496
497 if (ios->bus_width == MMC_BUS_WIDTH_4)
498 host->cmdat |= CMDAT_SD_4DAT;
499 else
500 host->cmdat &= ~CMDAT_SD_4DAT;
501
502 pr_debug("PXAMCI: clkrt = %x cmdat = %x\n",
503 host->clkrt, host->cmdat);
504 }
505
506 static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable)
507 {
508 struct pxamci_host *pxa_host = mmc_priv(host);
509
510 if (enable)
511 pxamci_enable_irq(pxa_host, SDIO_INT);
512 else
513 pxamci_disable_irq(pxa_host, SDIO_INT);
514 }
515
516 static const struct mmc_host_ops pxamci_ops = {
517 .request = pxamci_request,
518 .get_ro = pxamci_get_ro,
519 .set_ios = pxamci_set_ios,
520 .enable_sdio_irq = pxamci_enable_sdio_irq,
521 };
522
523 static void pxamci_dma_irq(int dma, void *devid)
524 {
525 struct pxamci_host *host = devid;
526 int dcsr = DCSR(dma);
527 DCSR(dma) = dcsr & ~DCSR_STOPIRQEN;
528
529 if (dcsr & DCSR_ENDINTR) {
530 writel(BUF_PART_FULL, host->base + MMC_PRTBUF);
531 } else {
532 printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
533 mmc_hostname(host->mmc), dma, dcsr);
534 host->data->error = -EIO;
535 pxamci_data_done(host, 0);
536 }
537 }
538
539 static irqreturn_t pxamci_detect_irq(int irq, void *devid)
540 {
541 struct pxamci_host *host = mmc_priv(devid);
542
543 mmc_detect_change(devid, host->pdata->detect_delay);
544 return IRQ_HANDLED;
545 }
546
547 static int pxamci_probe(struct platform_device *pdev)
548 {
549 struct mmc_host *mmc;
550 struct pxamci_host *host = NULL;
551 struct resource *r, *dmarx, *dmatx;
552 int ret, irq, gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
553
554 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
555 irq = platform_get_irq(pdev, 0);
556 if (!r || irq < 0)
557 return -ENXIO;
558
559 r = request_mem_region(r->start, SZ_4K, DRIVER_NAME);
560 if (!r)
561 return -EBUSY;
562
563 mmc = mmc_alloc_host(sizeof(struct pxamci_host), &pdev->dev);
564 if (!mmc) {
565 ret = -ENOMEM;
566 goto out;
567 }
568
569 mmc->ops = &pxamci_ops;
570
571 /*
572 * We can do SG-DMA, but we don't because we never know how much
573 * data we successfully wrote to the card.
574 */
575 mmc->max_phys_segs = NR_SG;
576
577 /*
578 * Our hardware DMA can handle a maximum of one page per SG entry.
579 */
580 mmc->max_seg_size = PAGE_SIZE;
581
582 /*
583 * Block length register is only 10 bits before PXA27x.
584 */
585 mmc->max_blk_size = cpu_is_pxa25x() ? 1023 : 2048;
586
587 /*
588 * Block count register is 16 bits.
589 */
590 mmc->max_blk_count = 65535;
591
592 host = mmc_priv(mmc);
593 host->mmc = mmc;
594 host->dma = -1;
595 host->pdata = pdev->dev.platform_data;
596 host->clkrt = CLKRT_OFF;
597
598 host->clk = clk_get(&pdev->dev, NULL);
599 if (IS_ERR(host->clk)) {
600 ret = PTR_ERR(host->clk);
601 host->clk = NULL;
602 goto out;
603 }
604
605 host->clkrate = clk_get_rate(host->clk);
606
607 /*
608 * Calculate minimum clock rate, rounding up.
609 */
610 mmc->f_min = (host->clkrate + 63) / 64;
611 mmc->f_max = (cpu_is_pxa300() || cpu_is_pxa310()) ? 26000000
612 : host->clkrate;
613
614 pxamci_init_ocr(host);
615
616 mmc->caps = 0;
617 host->cmdat = 0;
618 if (!cpu_is_pxa25x()) {
619 mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
620 host->cmdat |= CMDAT_SDIO_INT_EN;
621 if (cpu_is_pxa300() || cpu_is_pxa310())
622 mmc->caps |= MMC_CAP_MMC_HIGHSPEED |
623 MMC_CAP_SD_HIGHSPEED;
624 }
625
626 host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL);
627 if (!host->sg_cpu) {
628 ret = -ENOMEM;
629 goto out;
630 }
631
632 spin_lock_init(&host->lock);
633 host->res = r;
634 host->irq = irq;
635 host->imask = MMC_I_MASK_ALL;
636
637 host->base = ioremap(r->start, SZ_4K);
638 if (!host->base) {
639 ret = -ENOMEM;
640 goto out;
641 }
642
643 /*
644 * Ensure that the host controller is shut down, and setup
645 * with our defaults.
646 */
647 pxamci_stop_clock(host);
648 writel(0, host->base + MMC_SPI);
649 writel(64, host->base + MMC_RESTO);
650 writel(host->imask, host->base + MMC_I_MASK);
651
652 host->dma = pxa_request_dma(DRIVER_NAME, DMA_PRIO_LOW,
653 pxamci_dma_irq, host);
654 if (host->dma < 0) {
655 ret = -EBUSY;
656 goto out;
657 }
658
659 ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host);
660 if (ret)
661 goto out;
662
663 platform_set_drvdata(pdev, mmc);
664
665 dmarx = platform_get_resource(pdev, IORESOURCE_DMA, 0);
666 if (!dmarx) {
667 ret = -ENXIO;
668 goto out;
669 }
670 host->dma_drcmrrx = dmarx->start;
671
672 dmatx = platform_get_resource(pdev, IORESOURCE_DMA, 1);
673 if (!dmatx) {
674 ret = -ENXIO;
675 goto out;
676 }
677 host->dma_drcmrtx = dmatx->start;
678
679 if (host->pdata) {
680 gpio_cd = host->pdata->gpio_card_detect;
681 gpio_ro = host->pdata->gpio_card_ro;
682 gpio_power = host->pdata->gpio_power;
683 }
684 if (gpio_is_valid(gpio_power)) {
685 ret = gpio_request(gpio_power, "mmc card power");
686 if (ret) {
687 dev_err(&pdev->dev, "Failed requesting gpio_power %d\n", gpio_power);
688 goto out;
689 }
690 gpio_direction_output(gpio_power,
691 host->pdata->gpio_power_invert);
692 }
693 if (gpio_is_valid(gpio_ro)) {
694 ret = gpio_request(gpio_ro, "mmc card read only");
695 if (ret) {
696 dev_err(&pdev->dev, "Failed requesting gpio_ro %d\n", gpio_ro);
697 goto err_gpio_ro;
698 }
699 gpio_direction_input(gpio_ro);
700 }
701 if (gpio_is_valid(gpio_cd)) {
702 ret = gpio_request(gpio_cd, "mmc card detect");
703 if (ret) {
704 dev_err(&pdev->dev, "Failed requesting gpio_cd %d\n", gpio_cd);
705 goto err_gpio_cd;
706 }
707 gpio_direction_input(gpio_cd);
708
709 ret = request_irq(gpio_to_irq(gpio_cd), pxamci_detect_irq,
710 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
711 "mmc card detect", mmc);
712 if (ret) {
713 dev_err(&pdev->dev, "failed to request card detect IRQ\n");
714 goto err_request_irq;
715 }
716 }
717
718 if (host->pdata && host->pdata->init)
719 host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc);
720
721 if (gpio_is_valid(gpio_power) && host->pdata->setpower)
722 dev_warn(&pdev->dev, "gpio_power and setpower() both defined\n");
723 if (gpio_is_valid(gpio_ro) && host->pdata->get_ro)
724 dev_warn(&pdev->dev, "gpio_ro and get_ro() both defined\n");
725
726 mmc_add_host(mmc);
727
728 return 0;
729
730 err_request_irq:
731 gpio_free(gpio_cd);
732 err_gpio_cd:
733 gpio_free(gpio_ro);
734 err_gpio_ro:
735 gpio_free(gpio_power);
736 out:
737 if (host) {
738 if (host->dma >= 0)
739 pxa_free_dma(host->dma);
740 if (host->base)
741 iounmap(host->base);
742 if (host->sg_cpu)
743 dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
744 if (host->clk)
745 clk_put(host->clk);
746 }
747 if (mmc)
748 mmc_free_host(mmc);
749 release_resource(r);
750 return ret;
751 }
752
753 static int pxamci_remove(struct platform_device *pdev)
754 {
755 struct mmc_host *mmc = platform_get_drvdata(pdev);
756 int gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
757
758 platform_set_drvdata(pdev, NULL);
759
760 if (mmc) {
761 struct pxamci_host *host = mmc_priv(mmc);
762
763 if (host->pdata) {
764 gpio_cd = host->pdata->gpio_card_detect;
765 gpio_ro = host->pdata->gpio_card_ro;
766 gpio_power = host->pdata->gpio_power;
767 }
768 if (gpio_is_valid(gpio_cd)) {
769 free_irq(gpio_to_irq(gpio_cd), mmc);
770 gpio_free(gpio_cd);
771 }
772 if (gpio_is_valid(gpio_ro))
773 gpio_free(gpio_ro);
774 if (gpio_is_valid(gpio_power))
775 gpio_free(gpio_power);
776 if (host->vcc)
777 regulator_put(host->vcc);
778
779 if (host->pdata && host->pdata->exit)
780 host->pdata->exit(&pdev->dev, mmc);
781
782 mmc_remove_host(mmc);
783
784 pxamci_stop_clock(host);
785 writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD|
786 END_CMD_RES|PRG_DONE|DATA_TRAN_DONE,
787 host->base + MMC_I_MASK);
788
789 DRCMR(host->dma_drcmrrx) = 0;
790 DRCMR(host->dma_drcmrtx) = 0;
791
792 free_irq(host->irq, host);
793 pxa_free_dma(host->dma);
794 iounmap(host->base);
795 dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
796
797 clk_put(host->clk);
798
799 release_resource(host->res);
800
801 mmc_free_host(mmc);
802 }
803 return 0;
804 }
805
806 #ifdef CONFIG_PM
807 static int pxamci_suspend(struct device *dev)
808 {
809 struct mmc_host *mmc = dev_get_drvdata(dev);
810 int ret = 0;
811
812 if (mmc)
813 ret = mmc_suspend_host(mmc, PMSG_SUSPEND);
814
815 return ret;
816 }
817
818 static int pxamci_resume(struct device *dev)
819 {
820 struct mmc_host *mmc = dev_get_drvdata(dev);
821 int ret = 0;
822
823 if (mmc)
824 ret = mmc_resume_host(mmc);
825
826 return ret;
827 }
828
829 static struct dev_pm_ops pxamci_pm_ops = {
830 .suspend = pxamci_suspend,
831 .resume = pxamci_resume,
832 };
833 #endif
834
835 static struct platform_driver pxamci_driver = {
836 .probe = pxamci_probe,
837 .remove = pxamci_remove,
838 .driver = {
839 .name = DRIVER_NAME,
840 .owner = THIS_MODULE,
841 #ifdef CONFIG_PM
842 .pm = &pxamci_pm_ops,
843 #endif
844 },
845 };
846
847 static int __init pxamci_init(void)
848 {
849 return platform_driver_register(&pxamci_driver);
850 }
851
852 static void __exit pxamci_exit(void)
853 {
854 platform_driver_unregister(&pxamci_driver);
855 }
856
857 module_init(pxamci_init);
858 module_exit(pxamci_exit);
859
860 MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver");
861 MODULE_LICENSE("GPL");
862 MODULE_ALIAS("platform:pxa2xx-mci");
Linux for Ginger Game Console