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[ARM] pxa: Gumstix Verdex PCMCIA support
[linux-2.6/verdex.git] / drivers / mmc / host / mmci.c
blob705a5894a6bbae304a76b37f649ee0be474b89c4
1 /*
2 * linux/drivers/mmc/host/mmci.c - ARM PrimeCell MMCI PL180/1 driver
3 *
4 * Copyright (C) 2003 Deep Blue Solutions, Ltd, 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 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/init.h>
13 #include <linux/ioport.h>
14 #include <linux/device.h>
15 #include <linux/interrupt.h>
16 #include <linux/delay.h>
17 #include <linux/err.h>
18 #include <linux/highmem.h>
19 #include <linux/log2.h>
20 #include <linux/mmc/host.h>
21 #include <linux/amba/bus.h>
22 #include <linux/clk.h>
23 #include <linux/scatterlist.h>
24 #include <linux/gpio.h>
25 #include <linux/amba/mmci.h>
26 #include <linux/regulator/consumer.h>
27
28 #include <asm/cacheflush.h>
29 #include <asm/div64.h>
30 #include <asm/io.h>
31 #include <asm/sizes.h>
32
33 #include "mmci.h"
34
35 #define DRIVER_NAME "mmci-pl18x"
36
37 #define DBG(host,fmt,args...) \
38 pr_debug("%s: %s: " fmt, mmc_hostname(host->mmc), __func__ , args)
39
40 static unsigned int fmax = 515633;
41
42 /*
43 * This must be called with host->lock held
44 */
45 static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
46 {
47 u32 clk = 0;
48
49 if (desired) {
50 if (desired >= host->mclk) {
51 clk = MCI_CLK_BYPASS;
52 host->cclk = host->mclk;
53 } else {
54 clk = host->mclk / (2 * desired) - 1;
55 if (clk >= 256)
56 clk = 255;
57 host->cclk = host->mclk / (2 * (clk + 1));
58 }
59 if (host->hw_designer == 0x80)
60 clk |= MCI_FCEN; /* Bug fix in ST IP block */
61 clk |= MCI_CLK_ENABLE;
62 /* This hasn't proven to be worthwhile */
63 /* clk |= MCI_CLK_PWRSAVE; */
64 }
65
66 if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
67 clk |= MCI_WIDE_BUS;
68
69 writel(clk, host->base + MMCICLOCK);
70 }
71
72 static void
73 mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
74 {
75 writel(0, host->base + MMCICOMMAND);
76
77 BUG_ON(host->data);
78
79 host->mrq = NULL;
80 host->cmd = NULL;
81
82 if (mrq->data)
83 mrq->data->bytes_xfered = host->data_xfered;
84
85 /*
86 * Need to drop the host lock here; mmc_request_done may call
87 * back into the driver...
88 */
89 spin_unlock(&host->lock);
90 mmc_request_done(host->mmc, mrq);
91 spin_lock(&host->lock);
92 }
93
94 static void mmci_stop_data(struct mmci_host *host)
95 {
96 writel(0, host->base + MMCIDATACTRL);
97 writel(0, host->base + MMCIMASK1);
98 host->data = NULL;
99 }
100
101 static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
102 {
103 unsigned int datactrl, timeout, irqmask;
104 unsigned long long clks;
105 void __iomem *base;
106 int blksz_bits;
107
108 DBG(host, "blksz %04x blks %04x flags %08x\n",
109 data->blksz, data->blocks, data->flags);
110
111 host->data = data;
112 host->size = data->blksz;
113 host->data_xfered = 0;
114
115 mmci_init_sg(host, data);
116
117 clks = (unsigned long long)data->timeout_ns * host->cclk;
118 do_div(clks, 1000000000UL);
119
120 timeout = data->timeout_clks + (unsigned int)clks;
121
122 base = host->base;
123 writel(timeout, base + MMCIDATATIMER);
124 writel(host->size, base + MMCIDATALENGTH);
125
126 blksz_bits = ffs(data->blksz) - 1;
127 BUG_ON(1 << blksz_bits != data->blksz);
128
129 datactrl = MCI_DPSM_ENABLE | blksz_bits << 4;
130 if (data->flags & MMC_DATA_READ) {
131 datactrl |= MCI_DPSM_DIRECTION;
132 irqmask = MCI_RXFIFOHALFFULLMASK;
133
134 /*
135 * If we have less than a FIFOSIZE of bytes to transfer,
136 * trigger a PIO interrupt as soon as any data is available.
137 */
138 if (host->size < MCI_FIFOSIZE)
139 irqmask |= MCI_RXDATAAVLBLMASK;
140 } else {
141 /*
142 * We don't actually need to include "FIFO empty" here
143 * since its implicit in "FIFO half empty".
144 */
145 irqmask = MCI_TXFIFOHALFEMPTYMASK;
146 }
147
148 writel(datactrl, base + MMCIDATACTRL);
149 writel(readl(base + MMCIMASK0) & ~MCI_DATAENDMASK, base + MMCIMASK0);
150 writel(irqmask, base + MMCIMASK1);
151 }
152
153 static void
154 mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
155 {
156 void __iomem *base = host->base;
157
158 DBG(host, "op %02x arg %08x flags %08x\n",
159 cmd->opcode, cmd->arg, cmd->flags);
160
161 if (readl(base + MMCICOMMAND) & MCI_CPSM_ENABLE) {
162 writel(0, base + MMCICOMMAND);
163 udelay(1);
164 }
165
166 c |= cmd->opcode | MCI_CPSM_ENABLE;
167 if (cmd->flags & MMC_RSP_PRESENT) {
168 if (cmd->flags & MMC_RSP_136)
169 c |= MCI_CPSM_LONGRSP;
170 c |= MCI_CPSM_RESPONSE;
171 }
172 if (/*interrupt*/0)
173 c |= MCI_CPSM_INTERRUPT;
174
175 host->cmd = cmd;
176
177 writel(cmd->arg, base + MMCIARGUMENT);
178 writel(c, base + MMCICOMMAND);
179 }
180
181 static void
182 mmci_data_irq(struct mmci_host *host, struct mmc_data *data,
183 unsigned int status)
184 {
185 if (status & MCI_DATABLOCKEND) {
186 host->data_xfered += data->blksz;
187 }
188 if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
189 if (status & MCI_DATACRCFAIL)
190 data->error = -EILSEQ;
191 else if (status & MCI_DATATIMEOUT)
192 data->error = -ETIMEDOUT;
193 else if (status & (MCI_TXUNDERRUN|MCI_RXOVERRUN))
194 data->error = -EIO;
195 status |= MCI_DATAEND;
196
197 /*
198 * We hit an error condition. Ensure that any data
199 * partially written to a page is properly coherent.
200 */
201 if (host->sg_len && data->flags & MMC_DATA_READ)
202 flush_dcache_page(sg_page(host->sg_ptr));
203 }
204 if (status & MCI_DATAEND) {
205 mmci_stop_data(host);
206
207 if (!data->stop) {
208 mmci_request_end(host, data->mrq);
209 } else {
210 mmci_start_command(host, data->stop, 0);
211 }
212 }
213 }
214
215 static void
216 mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
217 unsigned int status)
218 {
219 void __iomem *base = host->base;
220
221 host->cmd = NULL;
222
223 cmd->resp[0] = readl(base + MMCIRESPONSE0);
224 cmd->resp[1] = readl(base + MMCIRESPONSE1);
225 cmd->resp[2] = readl(base + MMCIRESPONSE2);
226 cmd->resp[3] = readl(base + MMCIRESPONSE3);
227
228 if (status & MCI_CMDTIMEOUT) {
229 cmd->error = -ETIMEDOUT;
230 } else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) {
231 cmd->error = -EILSEQ;
232 }
233
234 if (!cmd->data || cmd->error) {
235 if (host->data)
236 mmci_stop_data(host);
237 mmci_request_end(host, cmd->mrq);
238 } else if (!(cmd->data->flags & MMC_DATA_READ)) {
239 mmci_start_data(host, cmd->data);
240 }
241 }
242
243 static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain)
244 {
245 void __iomem *base = host->base;
246 char *ptr = buffer;
247 u32 status;
248 int host_remain = host->size;
249
250 do {
251 int count = host_remain - (readl(base + MMCIFIFOCNT) << 2);
252
253 if (count > remain)
254 count = remain;
255
256 if (count <= 0)
257 break;
258
259 readsl(base + MMCIFIFO, ptr, count >> 2);
260
261 ptr += count;
262 remain -= count;
263 host_remain -= count;
264
265 if (remain == 0)
266 break;
267
268 status = readl(base + MMCISTATUS);
269 } while (status & MCI_RXDATAAVLBL);
270
271 return ptr - buffer;
272 }
273
274 static int mmci_pio_write(struct mmci_host *host, char *buffer, unsigned int remain, u32 status)
275 {
276 void __iomem *base = host->base;
277 char *ptr = buffer;
278
279 do {
280 unsigned int count, maxcnt;
281
282 maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE : MCI_FIFOHALFSIZE;
283 count = min(remain, maxcnt);
284
285 writesl(base + MMCIFIFO, ptr, count >> 2);
286
287 ptr += count;
288 remain -= count;
289
290 if (remain == 0)
291 break;
292
293 status = readl(base + MMCISTATUS);
294 } while (status & MCI_TXFIFOHALFEMPTY);
295
296 return ptr - buffer;
297 }
298
299 /*
300 * PIO data transfer IRQ handler.
301 */
302 static irqreturn_t mmci_pio_irq(int irq, void *dev_id)
303 {
304 struct mmci_host *host = dev_id;
305 void __iomem *base = host->base;
306 u32 status;
307
308 status = readl(base + MMCISTATUS);
309
310 DBG(host, "irq1 %08x\n", status);
311
312 do {
313 unsigned long flags;
314 unsigned int remain, len;
315 char *buffer;
316
317 /*
318 * For write, we only need to test the half-empty flag
319 * here - if the FIFO is completely empty, then by
320 * definition it is more than half empty.
321 *
322 * For read, check for data available.
323 */
324 if (!(status & (MCI_TXFIFOHALFEMPTY|MCI_RXDATAAVLBL)))
325 break;
326
327 /*
328 * Map the current scatter buffer.
329 */
330 buffer = mmci_kmap_atomic(host, &flags) + host->sg_off;
331 remain = host->sg_ptr->length - host->sg_off;
332
333 len = 0;
334 if (status & MCI_RXACTIVE)
335 len = mmci_pio_read(host, buffer, remain);
336 if (status & MCI_TXACTIVE)
337 len = mmci_pio_write(host, buffer, remain, status);
338
339 /*
340 * Unmap the buffer.
341 */
342 mmci_kunmap_atomic(host, buffer, &flags);
343
344 host->sg_off += len;
345 host->size -= len;
346 remain -= len;
347
348 if (remain)
349 break;
350
351 /*
352 * If we were reading, and we have completed this
353 * page, ensure that the data cache is coherent.
354 */
355 if (status & MCI_RXACTIVE)
356 flush_dcache_page(sg_page(host->sg_ptr));
357
358 if (!mmci_next_sg(host))
359 break;
360
361 status = readl(base + MMCISTATUS);
362 } while (1);
363
364 /*
365 * If we're nearing the end of the read, switch to
366 * "any data available" mode.
367 */
368 if (status & MCI_RXACTIVE && host->size < MCI_FIFOSIZE)
369 writel(MCI_RXDATAAVLBLMASK, base + MMCIMASK1);
370
371 /*
372 * If we run out of data, disable the data IRQs; this
373 * prevents a race where the FIFO becomes empty before
374 * the chip itself has disabled the data path, and
375 * stops us racing with our data end IRQ.
376 */
377 if (host->size == 0) {
378 writel(0, base + MMCIMASK1);
379 writel(readl(base + MMCIMASK0) | MCI_DATAENDMASK, base + MMCIMASK0);
380 }
381
382 return IRQ_HANDLED;
383 }
384
385 /*
386 * Handle completion of command and data transfers.
387 */
388 static irqreturn_t mmci_irq(int irq, void *dev_id)
389 {
390 struct mmci_host *host = dev_id;
391 u32 status;
392 int ret = 0;
393
394 spin_lock(&host->lock);
395
396 do {
397 struct mmc_command *cmd;
398 struct mmc_data *data;
399
400 status = readl(host->base + MMCISTATUS);
401 status &= readl(host->base + MMCIMASK0);
402 writel(status, host->base + MMCICLEAR);
403
404 DBG(host, "irq0 %08x\n", status);
405
406 data = host->data;
407 if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|
408 MCI_RXOVERRUN|MCI_DATAEND|MCI_DATABLOCKEND) && data)
409 mmci_data_irq(host, data, status);
410
411 cmd = host->cmd;
412 if (status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|MCI_CMDSENT|MCI_CMDRESPEND) && cmd)
413 mmci_cmd_irq(host, cmd, status);
414
415 ret = 1;
416 } while (status);
417
418 spin_unlock(&host->lock);
419
420 return IRQ_RETVAL(ret);
421 }
422
423 static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
424 {
425 struct mmci_host *host = mmc_priv(mmc);
426 unsigned long flags;
427
428 WARN_ON(host->mrq != NULL);
429
430 if (mrq->data && !is_power_of_2(mrq->data->blksz)) {
431 printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n",
432 mmc_hostname(mmc), mrq->data->blksz);
433 mrq->cmd->error = -EINVAL;
434 mmc_request_done(mmc, mrq);
435 return;
436 }
437
438 spin_lock_irqsave(&host->lock, flags);
439
440 host->mrq = mrq;
441
442 if (mrq->data && mrq->data->flags & MMC_DATA_READ)
443 mmci_start_data(host, mrq->data);
444
445 mmci_start_command(host, mrq->cmd, 0);
446
447 spin_unlock_irqrestore(&host->lock, flags);
448 }
449
450 static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
451 {
452 struct mmci_host *host = mmc_priv(mmc);
453 u32 pwr = 0;
454 unsigned long flags;
455
456 switch (ios->power_mode) {
457 case MMC_POWER_OFF:
458 if(host->vcc &&
459 regulator_is_enabled(host->vcc))
460 regulator_disable(host->vcc);
461 break;
462 case MMC_POWER_UP:
463 #ifdef CONFIG_REGULATOR
464 if (host->vcc)
465 /* This implicitly enables the regulator */
466 mmc_regulator_set_ocr(host->vcc, ios->vdd);
467 #endif
468 /*
469 * The translate_vdd function is not used if you have
470 * an external regulator, or your design is really weird.
471 * Using it would mean sending in power control BOTH using
472 * a regulator AND the 4 MMCIPWR bits. If we don't have
473 * a regulator, we might have some other platform specific
474 * power control behind this translate function.
475 */
476 if (!host->vcc && host->plat->translate_vdd)
477 pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
478 /* The ST version does not have this, fall through to POWER_ON */
479 if (host->hw_designer != AMBA_VENDOR_ST) {
480 pwr |= MCI_PWR_UP;
481 break;
482 }
483 case MMC_POWER_ON:
484 pwr |= MCI_PWR_ON;
485 break;
486 }
487
488 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) {
489 if (host->hw_designer != AMBA_VENDOR_ST)
490 pwr |= MCI_ROD;
491 else {
492 /*
493 * The ST Micro variant use the ROD bit for something
494 * else and only has OD (Open Drain).
495 */
496 pwr |= MCI_OD;
497 }
498 }
499
500 spin_lock_irqsave(&host->lock, flags);
501
502 mmci_set_clkreg(host, ios->clock);
503
504 if (host->pwr != pwr) {
505 host->pwr = pwr;
506 writel(pwr, host->base + MMCIPOWER);
507 }
508
509 spin_unlock_irqrestore(&host->lock, flags);
510 }
511
512 static int mmci_get_ro(struct mmc_host *mmc)
513 {
514 struct mmci_host *host = mmc_priv(mmc);
515
516 if (host->gpio_wp == -ENOSYS)
517 return -ENOSYS;
518
519 return gpio_get_value(host->gpio_wp);
520 }
521
522 static int mmci_get_cd(struct mmc_host *mmc)
523 {
524 struct mmci_host *host = mmc_priv(mmc);
525 unsigned int status;
526
527 if (host->gpio_cd == -ENOSYS)
528 status = host->plat->status(mmc_dev(host->mmc));
529 else
530 status = gpio_get_value(host->gpio_cd);
531
532 return !status;
533 }
534
535 static const struct mmc_host_ops mmci_ops = {
536 .request = mmci_request,
537 .set_ios = mmci_set_ios,
538 .get_ro = mmci_get_ro,
539 .get_cd = mmci_get_cd,
540 };
541
542 static void mmci_check_status(unsigned long data)
543 {
544 struct mmci_host *host = (struct mmci_host *)data;
545 unsigned int status = mmci_get_cd(host->mmc);
546
547 if (status ^ host->oldstat)
548 mmc_detect_change(host->mmc, 0);
549
550 host->oldstat = status;
551 mod_timer(&host->timer, jiffies + HZ);
552 }
553
554 static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
555 {
556 struct mmci_platform_data *plat = dev->dev.platform_data;
557 struct mmci_host *host;
558 struct mmc_host *mmc;
559 int ret;
560
561 /* must have platform data */
562 if (!plat) {
563 ret = -EINVAL;
564 goto out;
565 }
566
567 ret = amba_request_regions(dev, DRIVER_NAME);
568 if (ret)
569 goto out;
570
571 mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev);
572 if (!mmc) {
573 ret = -ENOMEM;
574 goto rel_regions;
575 }
576
577 host = mmc_priv(mmc);
578 host->mmc = mmc;
579
580 host->gpio_wp = -ENOSYS;
581 host->gpio_cd = -ENOSYS;
582
583 host->hw_designer = amba_manf(dev);
584 host->hw_revision = amba_rev(dev);
585 DBG(host, "designer ID = 0x%02x\n", host->hw_designer);
586 DBG(host, "revision = 0x%01x\n", host->hw_revision);
587
588 host->clk = clk_get(&dev->dev, NULL);
589 if (IS_ERR(host->clk)) {
590 ret = PTR_ERR(host->clk);
591 host->clk = NULL;
592 goto host_free;
593 }
594
595 ret = clk_enable(host->clk);
596 if (ret)
597 goto clk_free;
598
599 host->plat = plat;
600 host->mclk = clk_get_rate(host->clk);
601 /*
602 * According to the spec, mclk is max 100 MHz,
603 * so we try to adjust the clock down to this,
604 * (if possible).
605 */
606 if (host->mclk > 100000000) {
607 ret = clk_set_rate(host->clk, 100000000);
608 if (ret < 0)
609 goto clk_disable;
610 host->mclk = clk_get_rate(host->clk);
611 DBG(host, "eventual mclk rate: %u Hz\n", host->mclk);
612 }
613 host->base = ioremap(dev->res.start, resource_size(&dev->res));
614 if (!host->base) {
615 ret = -ENOMEM;
616 goto clk_disable;
617 }
618
619 mmc->ops = &mmci_ops;
620 mmc->f_min = (host->mclk + 511) / 512;
621 mmc->f_max = min(host->mclk, fmax);
622 #ifdef CONFIG_REGULATOR
623 /* If we're using the regulator framework, try to fetch a regulator */
624 host->vcc = regulator_get(&dev->dev, "vmmc");
625 if (IS_ERR(host->vcc))
626 host->vcc = NULL;
627 else {
628 int mask = mmc_regulator_get_ocrmask(host->vcc);
629
630 if (mask < 0)
631 dev_err(&dev->dev, "error getting OCR mask (%d)\n",
632 mask);
633 else {
634 host->mmc->ocr_avail = (u32) mask;
635 if (plat->ocr_mask)
636 dev_warn(&dev->dev,
637 "Provided ocr_mask/setpower will not be used "
638 "(using regulator instead)\n");
639 }
640 }
641 #endif
642 /* Fall back to platform data if no regulator is found */
643 if (host->vcc == NULL)
644 mmc->ocr_avail = plat->ocr_mask;
645 mmc->caps = plat->capabilities;
646
647 /*
648 * We can do SGIO
649 */
650 mmc->max_hw_segs = 16;
651 mmc->max_phys_segs = NR_SG;
652
653 /*
654 * Since we only have a 16-bit data length register, we must
655 * ensure that we don't exceed 2^16-1 bytes in a single request.
656 */
657 mmc->max_req_size = 65535;
658
659 /*
660 * Set the maximum segment size. Since we aren't doing DMA
661 * (yet) we are only limited by the data length register.
662 */
663 mmc->max_seg_size = mmc->max_req_size;
664
665 /*
666 * Block size can be up to 2048 bytes, but must be a power of two.
667 */
668 mmc->max_blk_size = 2048;
669
670 /*
671 * No limit on the number of blocks transferred.
672 */
673 mmc->max_blk_count = mmc->max_req_size;
674
675 spin_lock_init(&host->lock);
676
677 writel(0, host->base + MMCIMASK0);
678 writel(0, host->base + MMCIMASK1);
679 writel(0xfff, host->base + MMCICLEAR);
680
681 if (gpio_is_valid(plat->gpio_cd)) {
682 ret = gpio_request(plat->gpio_cd, DRIVER_NAME " (cd)");
683 if (ret == 0)
684 ret = gpio_direction_input(plat->gpio_cd);
685 if (ret == 0)
686 host->gpio_cd = plat->gpio_cd;
687 else if (ret != -ENOSYS)
688 goto err_gpio_cd;
689 }
690 if (gpio_is_valid(plat->gpio_wp)) {
691 ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)");
692 if (ret == 0)
693 ret = gpio_direction_input(plat->gpio_wp);
694 if (ret == 0)
695 host->gpio_wp = plat->gpio_wp;
696 else if (ret != -ENOSYS)
697 goto err_gpio_wp;
698 }
699
700 ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host);
701 if (ret)
702 goto unmap;
703
704 ret = request_irq(dev->irq[1], mmci_pio_irq, IRQF_SHARED, DRIVER_NAME " (pio)", host);
705 if (ret)
706 goto irq0_free;
707
708 writel(MCI_IRQENABLE, host->base + MMCIMASK0);
709
710 amba_set_drvdata(dev, mmc);
711 host->oldstat = mmci_get_cd(host->mmc);
712
713 mmc_add_host(mmc);
714
715 printk(KERN_INFO "%s: MMCI rev %x cfg %02x at 0x%016llx irq %d,%d\n",
716 mmc_hostname(mmc), amba_rev(dev), amba_config(dev),
717 (unsigned long long)dev->res.start, dev->irq[0], dev->irq[1]);
718
719 init_timer(&host->timer);
720 host->timer.data = (unsigned long)host;
721 host->timer.function = mmci_check_status;
722 host->timer.expires = jiffies + HZ;
723 add_timer(&host->timer);
724
725 return 0;
726
727 irq0_free:
728 free_irq(dev->irq[0], host);
729 unmap:
730 if (host->gpio_wp != -ENOSYS)
731 gpio_free(host->gpio_wp);
732 err_gpio_wp:
733 if (host->gpio_cd != -ENOSYS)
734 gpio_free(host->gpio_cd);
735 err_gpio_cd:
736 iounmap(host->base);
737 clk_disable:
738 clk_disable(host->clk);
739 clk_free:
740 clk_put(host->clk);
741 host_free:
742 mmc_free_host(mmc);
743 rel_regions:
744 amba_release_regions(dev);
745 out:
746 return ret;
747 }
748
749 static int __devexit mmci_remove(struct amba_device *dev)
750 {
751 struct mmc_host *mmc = amba_get_drvdata(dev);
752
753 amba_set_drvdata(dev, NULL);
754
755 if (mmc) {
756 struct mmci_host *host = mmc_priv(mmc);
757
758 del_timer_sync(&host->timer);
759
760 mmc_remove_host(mmc);
761
762 writel(0, host->base + MMCIMASK0);
763 writel(0, host->base + MMCIMASK1);
764
765 writel(0, host->base + MMCICOMMAND);
766 writel(0, host->base + MMCIDATACTRL);
767
768 free_irq(dev->irq[0], host);
769 free_irq(dev->irq[1], host);
770
771 if (host->gpio_wp != -ENOSYS)
772 gpio_free(host->gpio_wp);
773 if (host->gpio_cd != -ENOSYS)
774 gpio_free(host->gpio_cd);
775
776 iounmap(host->base);
777 clk_disable(host->clk);
778 clk_put(host->clk);
779
780 if (regulator_is_enabled(host->vcc))
781 regulator_disable(host->vcc);
782 regulator_put(host->vcc);
783
784 mmc_free_host(mmc);
785
786 amba_release_regions(dev);
787 }
788
789 return 0;
790 }
791
792 #ifdef CONFIG_PM
793 static int mmci_suspend(struct amba_device *dev, pm_message_t state)
794 {
795 struct mmc_host *mmc = amba_get_drvdata(dev);
796 int ret = 0;
797
798 if (mmc) {
799 struct mmci_host *host = mmc_priv(mmc);
800
801 ret = mmc_suspend_host(mmc, state);
802 if (ret == 0)
803 writel(0, host->base + MMCIMASK0);
804 }
805
806 return ret;
807 }
808
809 static int mmci_resume(struct amba_device *dev)
810 {
811 struct mmc_host *mmc = amba_get_drvdata(dev);
812 int ret = 0;
813
814 if (mmc) {
815 struct mmci_host *host = mmc_priv(mmc);
816
817 writel(MCI_IRQENABLE, host->base + MMCIMASK0);
818
819 ret = mmc_resume_host(mmc);
820 }
821
822 return ret;
823 }
824 #else
825 #define mmci_suspend NULL
826 #define mmci_resume NULL
827 #endif
828
829 static struct amba_id mmci_ids[] = {
830 {
831 .id = 0x00041180,
832 .mask = 0x000fffff,
833 },
834 {
835 .id = 0x00041181,
836 .mask = 0x000fffff,
837 },
838 /* ST Micro variants */
839 {
840 .id = 0x00180180,
841 .mask = 0x00ffffff,
842 },
843 {
844 .id = 0x00280180,
845 .mask = 0x00ffffff,
846 },
847 { 0, 0 },
848 };
849
850 static struct amba_driver mmci_driver = {
851 .drv = {
852 .name = DRIVER_NAME,
853 },
854 .probe = mmci_probe,
855 .remove = __devexit_p(mmci_remove),
856 .suspend = mmci_suspend,
857 .resume = mmci_resume,
858 .id_table = mmci_ids,
859 };
860
861 static int __init mmci_init(void)
862 {
863 return amba_driver_register(&mmci_driver);
864 }
865
866 static void __exit mmci_exit(void)
867 {
868 amba_driver_unregister(&mmci_driver);
869 }
870
871 module_init(mmci_init);
872 module_exit(mmci_exit);
873 module_param(fmax, uint, 0444);
874
875 MODULE_DESCRIPTION("ARM PrimeCell PL180/181 Multimedia Card Interface driver");
876 MODULE_LICENSE("GPL");
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