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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Pierre Ossman70f10482007-07-11 20:04:50 +02002 * linux/drivers/mmc/host/pxa.c - PXA MMCI driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/ioport.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010022#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/delay.h>
24#include <linux/interrupt.h>
25#include <linux/dma-mapping.h>
Russell Kingebebd9b2007-08-20 10:20:03 +010026#include <linux/clk.h>
27#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/mmc/host.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30#include <asm/dma.h>
31#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/sizes.h>
33
34#include <asm/arch/pxa-regs.h>
35#include <asm/arch/mmc.h>
36
37#include "pxamci.h"
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#define DRIVER_NAME "pxa2xx-mci"
40
41#define NR_SG 1
Russell Kingd8cb70d2007-10-26 17:56:40 +010042#define CLKRT_OFF (~0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44struct pxamci_host {
45 struct mmc_host *mmc;
46 spinlock_t lock;
47 struct resource *res;
48 void __iomem *base;
Russell Kingebebd9b2007-08-20 10:20:03 +010049 struct clk *clk;
50 unsigned long clkrate;
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 int irq;
52 int dma;
53 unsigned int clkrt;
54 unsigned int cmdat;
55 unsigned int imask;
56 unsigned int power_mode;
57 struct pxamci_platform_data *pdata;
58
59 struct mmc_request *mrq;
60 struct mmc_command *cmd;
61 struct mmc_data *data;
62
63 dma_addr_t sg_dma;
64 struct pxa_dma_desc *sg_cpu;
65 unsigned int dma_len;
66
67 unsigned int dma_dir;
68};
69
Linus Torvalds1da177e2005-04-16 15:20:36 -070070static void pxamci_stop_clock(struct pxamci_host *host)
71{
72 if (readl(host->base + MMC_STAT) & STAT_CLK_EN) {
73 unsigned long timeout = 10000;
74 unsigned int v;
75
76 writel(STOP_CLOCK, host->base + MMC_STRPCL);
77
78 do {
79 v = readl(host->base + MMC_STAT);
80 if (!(v & STAT_CLK_EN))
81 break;
82 udelay(1);
83 } while (timeout--);
84
85 if (v & STAT_CLK_EN)
86 dev_err(mmc_dev(host->mmc), "unable to stop clock\n");
87 }
88}
89
90static void pxamci_enable_irq(struct pxamci_host *host, unsigned int mask)
91{
92 unsigned long flags;
93
94 spin_lock_irqsave(&host->lock, flags);
95 host->imask &= ~mask;
96 writel(host->imask, host->base + MMC_I_MASK);
97 spin_unlock_irqrestore(&host->lock, flags);
98}
99
100static void pxamci_disable_irq(struct pxamci_host *host, unsigned int mask)
101{
102 unsigned long flags;
103
104 spin_lock_irqsave(&host->lock, flags);
105 host->imask |= mask;
106 writel(host->imask, host->base + MMC_I_MASK);
107 spin_unlock_irqrestore(&host->lock, flags);
108}
109
110static void pxamci_setup_data(struct pxamci_host *host, struct mmc_data *data)
111{
112 unsigned int nob = data->blocks;
Russell King3d63abe2006-04-24 11:27:02 +0100113 unsigned long long clks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 unsigned int timeout;
115 u32 dcmd;
116 int i;
117
118 host->data = data;
119
120 if (data->flags & MMC_DATA_STREAM)
121 nob = 0xffff;
122
123 writel(nob, host->base + MMC_NOB);
Pavel Pisa2c171bf2006-05-19 21:48:03 +0100124 writel(data->blksz, host->base + MMC_BLKLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Russell Kingebebd9b2007-08-20 10:20:03 +0100126 clks = (unsigned long long)data->timeout_ns * host->clkrate;
Russell King3d63abe2006-04-24 11:27:02 +0100127 do_div(clks, 1000000000UL);
128 timeout = (unsigned int)clks + (data->timeout_clks << host->clkrt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 writel((timeout + 255) / 256, host->base + MMC_RDTO);
130
131 if (data->flags & MMC_DATA_READ) {
132 host->dma_dir = DMA_FROM_DEVICE;
133 dcmd = DCMD_INCTRGADDR | DCMD_FLOWTRG;
134 DRCMRTXMMC = 0;
135 DRCMRRXMMC = host->dma | DRCMR_MAPVLD;
136 } else {
137 host->dma_dir = DMA_TO_DEVICE;
138 dcmd = DCMD_INCSRCADDR | DCMD_FLOWSRC;
139 DRCMRRXMMC = 0;
140 DRCMRTXMMC = host->dma | DRCMR_MAPVLD;
141 }
142
143 dcmd |= DCMD_BURST32 | DCMD_WIDTH1;
144
145 host->dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
146 host->dma_dir);
147
148 for (i = 0; i < host->dma_len; i++) {
Nicolas Pitrec7838372007-10-09 17:07:58 -0400149 unsigned int length = sg_dma_len(&data->sg[i]);
150 host->sg_cpu[i].dcmd = dcmd | length;
151 if (length & 31 && !(data->flags & MMC_DATA_READ))
152 host->sg_cpu[i].dcmd |= DCMD_ENDIRQEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 if (data->flags & MMC_DATA_READ) {
154 host->sg_cpu[i].dsadr = host->res->start + MMC_RXFIFO;
155 host->sg_cpu[i].dtadr = sg_dma_address(&data->sg[i]);
156 } else {
157 host->sg_cpu[i].dsadr = sg_dma_address(&data->sg[i]);
158 host->sg_cpu[i].dtadr = host->res->start + MMC_TXFIFO;
159 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 host->sg_cpu[i].ddadr = host->sg_dma + (i + 1) *
161 sizeof(struct pxa_dma_desc);
162 }
163 host->sg_cpu[host->dma_len - 1].ddadr = DDADR_STOP;
164 wmb();
165
166 DDADR(host->dma) = host->sg_dma;
167 DCSR(host->dma) = DCSR_RUN;
168}
169
170static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd, unsigned int cmdat)
171{
172 WARN_ON(host->cmd != NULL);
173 host->cmd = cmd;
174
175 if (cmd->flags & MMC_RSP_BUSY)
176 cmdat |= CMDAT_BUSY;
177
Russell Kinge9225172006-02-02 12:23:12 +0000178#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
179 switch (RSP_TYPE(mmc_resp_type(cmd))) {
Philip Langdale6f949902007-01-04 07:04:47 -0800180 case RSP_TYPE(MMC_RSP_R1): /* r1, r1b, r6, r7 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 cmdat |= CMDAT_RESP_SHORT;
182 break;
Russell Kinge9225172006-02-02 12:23:12 +0000183 case RSP_TYPE(MMC_RSP_R3):
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 cmdat |= CMDAT_RESP_R3;
185 break;
Russell Kinge9225172006-02-02 12:23:12 +0000186 case RSP_TYPE(MMC_RSP_R2):
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 cmdat |= CMDAT_RESP_R2;
188 break;
189 default:
190 break;
191 }
192
193 writel(cmd->opcode, host->base + MMC_CMD);
194 writel(cmd->arg >> 16, host->base + MMC_ARGH);
195 writel(cmd->arg & 0xffff, host->base + MMC_ARGL);
196 writel(cmdat, host->base + MMC_CMDAT);
197 writel(host->clkrt, host->base + MMC_CLKRT);
198
199 writel(START_CLOCK, host->base + MMC_STRPCL);
200
201 pxamci_enable_irq(host, END_CMD_RES);
202}
203
204static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq)
205{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 host->mrq = NULL;
207 host->cmd = NULL;
208 host->data = NULL;
209 mmc_request_done(host->mmc, mrq);
210}
211
212static int pxamci_cmd_done(struct pxamci_host *host, unsigned int stat)
213{
214 struct mmc_command *cmd = host->cmd;
215 int i;
216 u32 v;
217
218 if (!cmd)
219 return 0;
220
221 host->cmd = NULL;
222
223 /*
224 * Did I mention this is Sick. We always need to
225 * discard the upper 8 bits of the first 16-bit word.
226 */
227 v = readl(host->base + MMC_RES) & 0xffff;
228 for (i = 0; i < 4; i++) {
229 u32 w1 = readl(host->base + MMC_RES) & 0xffff;
230 u32 w2 = readl(host->base + MMC_RES) & 0xffff;
231 cmd->resp[i] = v << 24 | w1 << 8 | w2 >> 8;
232 v = w2;
233 }
234
235 if (stat & STAT_TIME_OUT_RESPONSE) {
Pierre Ossman17b04292007-07-22 22:18:46 +0200236 cmd->error = -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 } else if (stat & STAT_RES_CRC_ERR && cmd->flags & MMC_RSP_CRC) {
238#ifdef CONFIG_PXA27x
239 /*
240 * workaround for erratum #42:
241 * Intel PXA27x Family Processor Specification Update Rev 001
Nicolas Pitre90e07d92007-05-13 18:03:08 +0200242 * A bogus CRC error can appear if the msb of a 136 bit
243 * response is a one.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 */
Nicolas Pitre90e07d92007-05-13 18:03:08 +0200245 if (cmd->flags & MMC_RSP_136 && cmd->resp[0] & 0x80000000) {
246 pr_debug("ignoring CRC from command %d - *risky*\n", cmd->opcode);
247 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248#endif
Pierre Ossman17b04292007-07-22 22:18:46 +0200249 cmd->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
251
252 pxamci_disable_irq(host, END_CMD_RES);
Pierre Ossman17b04292007-07-22 22:18:46 +0200253 if (host->data && !cmd->error) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 pxamci_enable_irq(host, DATA_TRAN_DONE);
255 } else {
256 pxamci_finish_request(host, host->mrq);
257 }
258
259 return 1;
260}
261
262static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
263{
264 struct mmc_data *data = host->data;
265
266 if (!data)
267 return 0;
268
269 DCSR(host->dma) = 0;
270 dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_len,
271 host->dma_dir);
272
273 if (stat & STAT_READ_TIME_OUT)
Pierre Ossman17b04292007-07-22 22:18:46 +0200274 data->error = -ETIMEDOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 else if (stat & (STAT_CRC_READ_ERROR|STAT_CRC_WRITE_ERROR))
Pierre Ossman17b04292007-07-22 22:18:46 +0200276 data->error = -EILSEQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278 /*
279 * There appears to be a hardware design bug here. There seems to
280 * be no way to find out how much data was transferred to the card.
281 * This means that if there was an error on any block, we mark all
282 * data blocks as being in error.
283 */
Pierre Ossman17b04292007-07-22 22:18:46 +0200284 if (!data->error)
Pavel Pisa2c171bf2006-05-19 21:48:03 +0100285 data->bytes_xfered = data->blocks * data->blksz;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 else
287 data->bytes_xfered = 0;
288
289 pxamci_disable_irq(host, DATA_TRAN_DONE);
290
291 host->data = NULL;
Russell King58741e82006-05-02 20:02:39 +0100292 if (host->mrq->stop) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 pxamci_stop_clock(host);
Bridge Wudf456f42007-09-25 19:09:19 +0200294 pxamci_start_cmd(host, host->mrq->stop, host->cmdat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 } else {
296 pxamci_finish_request(host, host->mrq);
297 }
298
299 return 1;
300}
301
David Howells7d12e782006-10-05 14:55:46 +0100302static irqreturn_t pxamci_irq(int irq, void *devid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303{
304 struct pxamci_host *host = devid;
305 unsigned int ireg;
306 int handled = 0;
307
Bridge Wu81ab570f2007-09-25 18:59:07 +0200308 ireg = readl(host->base + MMC_I_REG) & ~readl(host->base + MMC_I_MASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 if (ireg) {
311 unsigned stat = readl(host->base + MMC_STAT);
312
Russell Kingd78e9072006-05-02 20:18:53 +0100313 pr_debug("PXAMCI: irq %08x stat %08x\n", ireg, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315 if (ireg & END_CMD_RES)
316 handled |= pxamci_cmd_done(host, stat);
317 if (ireg & DATA_TRAN_DONE)
318 handled |= pxamci_data_done(host, stat);
Bridge Wu5d3ad4e2007-09-25 19:11:00 +0200319 if (ireg & SDIO_INT) {
320 mmc_signal_sdio_irq(host->mmc);
321 handled = 1;
322 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 }
324
325 return IRQ_RETVAL(handled);
326}
327
328static void pxamci_request(struct mmc_host *mmc, struct mmc_request *mrq)
329{
330 struct pxamci_host *host = mmc_priv(mmc);
331 unsigned int cmdat;
332
333 WARN_ON(host->mrq != NULL);
334
335 host->mrq = mrq;
336
337 pxamci_stop_clock(host);
338
339 cmdat = host->cmdat;
340 host->cmdat &= ~CMDAT_INIT;
341
342 if (mrq->data) {
343 pxamci_setup_data(host, mrq->data);
344
345 cmdat &= ~CMDAT_BUSY;
346 cmdat |= CMDAT_DATAEN | CMDAT_DMAEN;
347 if (mrq->data->flags & MMC_DATA_WRITE)
348 cmdat |= CMDAT_WRITE;
349
350 if (mrq->data->flags & MMC_DATA_STREAM)
351 cmdat |= CMDAT_STREAM;
352 }
353
354 pxamci_start_cmd(host, mrq->cmd, cmdat);
355}
356
Richard Purdiee6195242005-09-06 15:18:56 -0700357static int pxamci_get_ro(struct mmc_host *mmc)
358{
359 struct pxamci_host *host = mmc_priv(mmc);
360
361 if (host->pdata && host->pdata->get_ro)
Sascha Hauer9e866192006-12-05 07:41:09 +0100362 return host->pdata->get_ro(mmc_dev(mmc));
Richard Purdiee6195242005-09-06 15:18:56 -0700363 /* Host doesn't support read only detection so assume writeable */
364 return 0;
365}
366
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
368{
369 struct pxamci_host *host = mmc_priv(mmc);
370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 if (ios->clock) {
Russell Kingebebd9b2007-08-20 10:20:03 +0100372 unsigned long rate = host->clkrate;
373 unsigned int clk = rate / ios->clock;
374
Russell Kingd8cb70d2007-10-26 17:56:40 +0100375 if (host->clkrt == CLKRT_OFF)
376 clk_enable(host->clk);
377
Bridge Wu64eb0362007-12-13 07:24:30 +0100378 if (ios->clock == 26000000) {
379 /* to support 26MHz on pxa300/pxa310 */
380 host->clkrt = 7;
381 } else {
382 /* to handle (19.5MHz, 26MHz) */
383 if (!clk)
384 clk = 1;
385
386 /*
387 * clk might result in a lower divisor than we
388 * desire. check for that condition and adjust
389 * as appropriate.
390 */
391 if (rate / clk > ios->clock)
392 clk <<= 1;
393 host->clkrt = fls(clk) - 1;
394 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396 /*
397 * we write clkrt on the next command
398 */
399 } else {
400 pxamci_stop_clock(host);
Russell Kingd8cb70d2007-10-26 17:56:40 +0100401 if (host->clkrt != CLKRT_OFF) {
402 host->clkrt = CLKRT_OFF;
403 clk_disable(host->clk);
404 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 }
406
407 if (host->power_mode != ios->power_mode) {
408 host->power_mode = ios->power_mode;
409
410 if (host->pdata && host->pdata->setpower)
Sascha Hauer9e866192006-12-05 07:41:09 +0100411 host->pdata->setpower(mmc_dev(mmc), ios->vdd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
413 if (ios->power_mode == MMC_POWER_ON)
414 host->cmdat |= CMDAT_INIT;
415 }
416
Bridge Wudf456f42007-09-25 19:09:19 +0200417 if (ios->bus_width == MMC_BUS_WIDTH_4)
418 host->cmdat |= CMDAT_SD_4DAT;
419 else
420 host->cmdat &= ~CMDAT_SD_4DAT;
421
Russell Kingd78e9072006-05-02 20:18:53 +0100422 pr_debug("PXAMCI: clkrt = %x cmdat = %x\n",
Russell Kingc6563172006-03-29 09:30:20 +0100423 host->clkrt, host->cmdat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424}
425
Bridge Wu5d3ad4e2007-09-25 19:11:00 +0200426static void pxamci_enable_sdio_irq(struct mmc_host *host, int enable)
427{
428 struct pxamci_host *pxa_host = mmc_priv(host);
429
430 if (enable)
431 pxamci_enable_irq(pxa_host, SDIO_INT);
432 else
433 pxamci_disable_irq(pxa_host, SDIO_INT);
434}
435
David Brownellab7aefd2006-11-12 17:55:30 -0800436static const struct mmc_host_ops pxamci_ops = {
Bridge Wu5d3ad4e2007-09-25 19:11:00 +0200437 .request = pxamci_request,
438 .get_ro = pxamci_get_ro,
439 .set_ios = pxamci_set_ios,
440 .enable_sdio_irq = pxamci_enable_sdio_irq,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441};
442
David Howells7d12e782006-10-05 14:55:46 +0100443static void pxamci_dma_irq(int dma, void *devid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444{
Nicolas Pitrec7838372007-10-09 17:07:58 -0400445 struct pxamci_host *host = devid;
446 int dcsr = DCSR(dma);
447 DCSR(dma) = dcsr & ~DCSR_STOPIRQEN;
448
449 if (dcsr & DCSR_ENDINTR) {
450 writel(BUF_PART_FULL, host->base + MMC_PRTBUF);
451 } else {
452 printk(KERN_ERR "%s: DMA error on channel %d (DCSR=%#x)\n",
453 mmc_hostname(host->mmc), dma, dcsr);
454 host->data->error = -EIO;
455 pxamci_data_done(host, 0);
456 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457}
458
David Howells7d12e782006-10-05 14:55:46 +0100459static irqreturn_t pxamci_detect_irq(int irq, void *devid)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460{
Richard Purdiec26971c2005-09-08 22:48:16 +0100461 struct pxamci_host *host = mmc_priv(devid);
462
463 mmc_detect_change(devid, host->pdata->detect_delay);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 return IRQ_HANDLED;
465}
466
Russell King3ae5eae2005-11-09 22:32:44 +0000467static int pxamci_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 struct mmc_host *mmc;
470 struct pxamci_host *host = NULL;
471 struct resource *r;
472 int ret, irq;
473
474 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
475 irq = platform_get_irq(pdev, 0);
David Vrabel48944732006-01-19 17:56:29 +0000476 if (!r || irq < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 return -ENXIO;
478
479 r = request_mem_region(r->start, SZ_4K, DRIVER_NAME);
480 if (!r)
481 return -EBUSY;
482
Russell King3ae5eae2005-11-09 22:32:44 +0000483 mmc = mmc_alloc_host(sizeof(struct pxamci_host), &pdev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 if (!mmc) {
485 ret = -ENOMEM;
486 goto out;
487 }
488
489 mmc->ops = &pxamci_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491 /*
492 * We can do SG-DMA, but we don't because we never know how much
493 * data we successfully wrote to the card.
494 */
495 mmc->max_phys_segs = NR_SG;
496
497 /*
498 * Our hardware DMA can handle a maximum of one page per SG entry.
499 */
500 mmc->max_seg_size = PAGE_SIZE;
501
Pierre Ossmanfe4a3c72006-11-21 17:54:23 +0100502 /*
Nicolas Pitrefe2dc442007-09-24 15:47:18 -0400503 * Block length register is only 10 bits before PXA27x.
Pierre Ossmanfe4a3c72006-11-21 17:54:23 +0100504 */
Nicolas Pitrefe2dc442007-09-24 15:47:18 -0400505 mmc->max_blk_size = (cpu_is_pxa21x() || cpu_is_pxa25x()) ? 1023 : 2048;
Pierre Ossmanfe4a3c72006-11-21 17:54:23 +0100506
Pierre Ossman55db8902006-11-21 17:55:45 +0100507 /*
508 * Block count register is 16 bits.
509 */
510 mmc->max_blk_count = 65535;
511
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 host = mmc_priv(mmc);
513 host->mmc = mmc;
514 host->dma = -1;
515 host->pdata = pdev->dev.platform_data;
Russell Kingd8cb70d2007-10-26 17:56:40 +0100516 host->clkrt = CLKRT_OFF;
Russell Kingebebd9b2007-08-20 10:20:03 +0100517
518 host->clk = clk_get(&pdev->dev, "MMCCLK");
519 if (IS_ERR(host->clk)) {
520 ret = PTR_ERR(host->clk);
521 host->clk = NULL;
522 goto out;
523 }
524
525 host->clkrate = clk_get_rate(host->clk);
526
527 /*
528 * Calculate minimum clock rate, rounding up.
529 */
530 mmc->f_min = (host->clkrate + 63) / 64;
Bridge Wu64eb0362007-12-13 07:24:30 +0100531 mmc->f_max = (cpu_is_pxa300() || cpu_is_pxa310()) ? 26000000
532 : host->clkrate;
Russell Kingebebd9b2007-08-20 10:20:03 +0100533
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 mmc->ocr_avail = host->pdata ?
535 host->pdata->ocr_mask :
536 MMC_VDD_32_33|MMC_VDD_33_34;
Bridge Wudf456f42007-09-25 19:09:19 +0200537 mmc->caps = 0;
Bridge Wu5d3ad4e2007-09-25 19:11:00 +0200538 host->cmdat = 0;
539 if (!cpu_is_pxa21x() && !cpu_is_pxa25x()) {
540 mmc->caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
541 host->cmdat |= CMDAT_SDIO_INT_EN;
Bridge Wu64eb0362007-12-13 07:24:30 +0100542 if (cpu_is_pxa300() || cpu_is_pxa310())
543 mmc->caps |= MMC_CAP_MMC_HIGHSPEED |
544 MMC_CAP_SD_HIGHSPEED;
Bridge Wu5d3ad4e2007-09-25 19:11:00 +0200545 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546
Russell King3ae5eae2005-11-09 22:32:44 +0000547 host->sg_cpu = dma_alloc_coherent(&pdev->dev, PAGE_SIZE, &host->sg_dma, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 if (!host->sg_cpu) {
549 ret = -ENOMEM;
550 goto out;
551 }
552
553 spin_lock_init(&host->lock);
554 host->res = r;
555 host->irq = irq;
556 host->imask = MMC_I_MASK_ALL;
557
558 host->base = ioremap(r->start, SZ_4K);
559 if (!host->base) {
560 ret = -ENOMEM;
561 goto out;
562 }
563
564 /*
565 * Ensure that the host controller is shut down, and setup
566 * with our defaults.
567 */
568 pxamci_stop_clock(host);
569 writel(0, host->base + MMC_SPI);
570 writel(64, host->base + MMC_RESTO);
571 writel(host->imask, host->base + MMC_I_MASK);
572
573 host->dma = pxa_request_dma(DRIVER_NAME, DMA_PRIO_LOW,
574 pxamci_dma_irq, host);
575 if (host->dma < 0) {
576 ret = -EBUSY;
577 goto out;
578 }
579
580 ret = request_irq(host->irq, pxamci_irq, 0, DRIVER_NAME, host);
581 if (ret)
582 goto out;
583
Russell King3ae5eae2005-11-09 22:32:44 +0000584 platform_set_drvdata(pdev, mmc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585
586 if (host->pdata && host->pdata->init)
Russell King3ae5eae2005-11-09 22:32:44 +0000587 host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
589 mmc_add_host(mmc);
590
591 return 0;
592
593 out:
594 if (host) {
595 if (host->dma >= 0)
596 pxa_free_dma(host->dma);
597 if (host->base)
598 iounmap(host->base);
599 if (host->sg_cpu)
Russell King3ae5eae2005-11-09 22:32:44 +0000600 dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
Russell Kingebebd9b2007-08-20 10:20:03 +0100601 if (host->clk)
602 clk_put(host->clk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 }
604 if (mmc)
605 mmc_free_host(mmc);
606 release_resource(r);
607 return ret;
608}
609
Russell King3ae5eae2005-11-09 22:32:44 +0000610static int pxamci_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611{
Russell King3ae5eae2005-11-09 22:32:44 +0000612 struct mmc_host *mmc = platform_get_drvdata(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Russell King3ae5eae2005-11-09 22:32:44 +0000614 platform_set_drvdata(pdev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616 if (mmc) {
617 struct pxamci_host *host = mmc_priv(mmc);
618
619 if (host->pdata && host->pdata->exit)
Russell King3ae5eae2005-11-09 22:32:44 +0000620 host->pdata->exit(&pdev->dev, mmc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
622 mmc_remove_host(mmc);
623
624 pxamci_stop_clock(host);
625 writel(TXFIFO_WR_REQ|RXFIFO_RD_REQ|CLK_IS_OFF|STOP_CMD|
626 END_CMD_RES|PRG_DONE|DATA_TRAN_DONE,
627 host->base + MMC_I_MASK);
628
629 DRCMRRXMMC = 0;
630 DRCMRTXMMC = 0;
631
632 free_irq(host->irq, host);
633 pxa_free_dma(host->dma);
634 iounmap(host->base);
Russell King3ae5eae2005-11-09 22:32:44 +0000635 dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Russell Kingebebd9b2007-08-20 10:20:03 +0100637 clk_put(host->clk);
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 release_resource(host->res);
640
641 mmc_free_host(mmc);
642 }
643 return 0;
644}
645
646#ifdef CONFIG_PM
Russell King3ae5eae2005-11-09 22:32:44 +0000647static int pxamci_suspend(struct platform_device *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648{
Russell King3ae5eae2005-11-09 22:32:44 +0000649 struct mmc_host *mmc = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 int ret = 0;
651
Russell King9480e302005-10-28 09:52:56 -0700652 if (mmc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 ret = mmc_suspend_host(mmc, state);
654
655 return ret;
656}
657
Russell King3ae5eae2005-11-09 22:32:44 +0000658static int pxamci_resume(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
Russell King3ae5eae2005-11-09 22:32:44 +0000660 struct mmc_host *mmc = platform_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 int ret = 0;
662
Russell King9480e302005-10-28 09:52:56 -0700663 if (mmc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 ret = mmc_resume_host(mmc);
665
666 return ret;
667}
668#else
669#define pxamci_suspend NULL
670#define pxamci_resume NULL
671#endif
672
Russell King3ae5eae2005-11-09 22:32:44 +0000673static struct platform_driver pxamci_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 .probe = pxamci_probe,
675 .remove = pxamci_remove,
676 .suspend = pxamci_suspend,
677 .resume = pxamci_resume,
Russell King3ae5eae2005-11-09 22:32:44 +0000678 .driver = {
679 .name = DRIVER_NAME,
680 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681};
682
683static int __init pxamci_init(void)
684{
Russell King3ae5eae2005-11-09 22:32:44 +0000685 return platform_driver_register(&pxamci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686}
687
688static void __exit pxamci_exit(void)
689{
Russell King3ae5eae2005-11-09 22:32:44 +0000690 platform_driver_unregister(&pxamci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691}
692
693module_init(pxamci_init);
694module_exit(pxamci_exit);
695
696MODULE_DESCRIPTION("PXA Multimedia Card Interface Driver");
697MODULE_LICENSE("GPL");