1 /*
2 * linux/drivers/mmc/tmio_mmc.c
3 *
4 * Copyright (C) 2004 Ian Molton
5 * Copyright (C) 2007 Ian Molton
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Driver for the MMC / SD / SDIO cell found in:
12 *
13 * TC6393XB TC6391XB TC6387XB T7L66XB
14 *
15 * This driver draws mainly on scattered spec sheets, Reverse engineering
16 * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit
17 * support). (Further 4 bit support from a later datasheet).
18 *
19 * TODO:
20 * Investigate using a workqueue for PIO transfers
21 * Eliminate FIXMEs
22 * SDIO support
23 * Better Power management
24 * Handle MMC errors better
25 * double buffer support
26 *
27 */
28 #include <linux/module.h>
29 #include <linux/irq.h>
30 #include <linux/device.h>
31 #include <linux/delay.h>
32 #include <linux/mmc/host.h>
33 #include <linux/mfd/core.h>
34 #include <linux/mfd/tmio.h>
35
36 #include "tmio_mmc.h"
37
38 /*
39 * Fixme - documentation conflicts on what the clock values are for the
40 * various dividers.
41 * One document I have says that its a divisor of a 24MHz clock, another 33.
42 * This probably depends on HCLK for a given platform, so we may need to
43 * require HCLK be passed to us from the MFD core.
44 *
45 */
46
tmio_mmc_set_clock(struct tmio_mmc_host * host,int new_clock)47 static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
48 {
49 void __iomem *cnf = host->cnf;
50 void __iomem *ctl = host->ctl;
51 u32 clk = 0, clock;
52
53 if (new_clock) {
54 for (clock = 46875, clk = 0x100; new_clock >= (clock<<1); ) {
55 clock <<= 1;
56 clk >>= 1;
57 }
58 if (clk & 0x1)
59 clk = 0x20000;
60
61 clk >>= 2;
62 tmio_iowrite8((clk & 0x8000) ? 0 : 1, cnf + CNF_SD_CLK_MODE);
63 clk |= 0x100;
64 }
65
66 tmio_iowrite16(clk, ctl + CTL_SD_CARD_CLK_CTL);
67 }
68
tmio_mmc_clk_stop(struct tmio_mmc_host * host)69 static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
70 {
71 void __iomem *ctl = host->ctl;
72
73 tmio_iowrite16(0x0000, ctl + CTL_CLK_AND_WAIT_CTL);
74 msleep(10);
75 tmio_iowrite16(tmio_ioread16(ctl + CTL_SD_CARD_CLK_CTL) & ~0x0100,
76 ctl + CTL_SD_CARD_CLK_CTL);
77 msleep(10);
78 }
79
tmio_mmc_clk_start(struct tmio_mmc_host * host)80 static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
81 {
82 void __iomem *ctl = host->ctl;
83
84 tmio_iowrite16(tmio_ioread16(ctl + CTL_SD_CARD_CLK_CTL) | 0x0100,
85 ctl + CTL_SD_CARD_CLK_CTL);
86 msleep(10);
87 tmio_iowrite16(0x0100, ctl + CTL_CLK_AND_WAIT_CTL);
88 msleep(10);
89 }
90
reset(struct tmio_mmc_host * host)91 static void reset(struct tmio_mmc_host *host)
92 {
93 void __iomem *ctl = host->ctl;
94
95 /* FIXME - should we set stop clock reg here */
96 tmio_iowrite16(0x0000, ctl + CTL_RESET_SD);
97 tmio_iowrite16(0x0000, ctl + CTL_RESET_SDIO);
98 msleep(10);
99 tmio_iowrite16(0x0001, ctl + CTL_RESET_SD);
100 tmio_iowrite16(0x0001, ctl + CTL_RESET_SDIO);
101 msleep(10);
102 }
103
104 static void
tmio_mmc_finish_request(struct tmio_mmc_host * host)105 tmio_mmc_finish_request(struct tmio_mmc_host *host)
106 {
107 struct mmc_request *mrq = host->mrq;
108
109 host->mrq = NULL;
110 host->cmd = NULL;
111 host->data = NULL;
112
113 mmc_request_done(host->mmc, mrq);
114 }
115
116 /* These are the bitmasks the tmio chip requires to implement the MMC response
117 * types. Note that R1 and R6 are the same in this scheme. */
118 #define APP_CMD 0x0040
119 #define RESP_NONE 0x0300
120 #define RESP_R1 0x0400
121 #define RESP_R1B 0x0500
122 #define RESP_R2 0x0600
123 #define RESP_R3 0x0700
124 #define DATA_PRESENT 0x0800
125 #define TRANSFER_READ 0x1000
126 #define TRANSFER_MULTI 0x2000
127 #define SECURITY_CMD 0x4000
128
129 static int
tmio_mmc_start_command(struct tmio_mmc_host * host,struct mmc_command * cmd)130 tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
131 {
132 void __iomem *ctl = host->ctl;
133 struct mmc_data *data = host->data;
134 int c = cmd->opcode;
135
136 /* Command 12 is handled by hardware */
137 if (cmd->opcode == 12 && !cmd->arg) {
138 tmio_iowrite16(0x001, ctl + CTL_STOP_INTERNAL_ACTION);
139 return 0;
140 }
141
142 switch (mmc_resp_type(cmd)) {
143 case MMC_RSP_NONE: c |= RESP_NONE; break;
144 case MMC_RSP_R1: c |= RESP_R1; break;
145 case MMC_RSP_R1B: c |= RESP_R1B; break;
146 case MMC_RSP_R2: c |= RESP_R2; break;
147 case MMC_RSP_R3: c |= RESP_R3; break;
148 default:
149 pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
150 return -EINVAL;
151 }
152
153 host->cmd = cmd;
154
155 /* FIXME - this seems to be ok comented out but the spec suggest this bit should
156 * be set when issuing app commands.
157 * if(cmd->flags & MMC_FLAG_ACMD)
158 * c |= APP_CMD;
159 */
160 if (data) {
161 c |= DATA_PRESENT;
162 if (data->blocks > 1) {
163 tmio_iowrite16(0x100, ctl + CTL_STOP_INTERNAL_ACTION);
164 c |= TRANSFER_MULTI;
165 }
166 if (data->flags & MMC_DATA_READ)
167 c |= TRANSFER_READ;
168 }
169
170 enable_mmc_irqs(ctl, TMIO_MASK_CMD);
171
172 /* Fire off the command */
173 tmio_iowrite32(cmd->arg, ctl + CTL_ARG_REG);
174 tmio_iowrite16(c, ctl + CTL_SD_CMD);
175
176 return 0;
177 }
178
179 /* This chip always returns (at least?) as much data as you ask for.
180 * I'm unsure what happens if you ask for less than a block. This should be
181 * looked into to ensure that a funny length read doesnt hose the controller.
182 *
183 */
tmio_mmc_pio_irq(struct tmio_mmc_host * host)184 static inline void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
185 {
186 void __iomem *ctl = host->ctl;
187 struct mmc_data *data = host->data;
188 unsigned short *buf;
189 unsigned int count;
190 unsigned long flags;
191
192 if (!data) {
193 pr_debug("Spurious PIO IRQ\n");
194 return;
195 }
196
197 buf = (unsigned short *)(tmio_mmc_kmap_atomic(host, &flags) +
198 host->sg_off);
199
200 count = host->sg_ptr->length - host->sg_off;
201 if (count > data->blksz)
202 count = data->blksz;
203
204 pr_debug("count: %08x offset: %08x flags %08x\n",
205 count, host->sg_off, data->flags);
206
207 /* Transfer the data */
208 if (data->flags & MMC_DATA_READ)
209 tmio_ioread16_rep(ctl + CTL_SD_DATA_PORT, buf, count >> 1);
210 else
211 tmio_iowrite16_rep(ctl + CTL_SD_DATA_PORT, buf, count >> 1);
212
213 host->sg_off += count;
214
215 tmio_mmc_kunmap_atomic(host, &flags);
216
217 if (host->sg_off == host->sg_ptr->length)
218 tmio_mmc_next_sg(host);
219
220 return;
221 }
222
tmio_mmc_data_irq(struct tmio_mmc_host * host)223 static inline void tmio_mmc_data_irq(struct tmio_mmc_host *host)
224 {
225 void __iomem *ctl = host->ctl;
226 struct mmc_data *data = host->data;
227 struct mmc_command *stop;
228
229 host->data = NULL;
230
231 if (!data) {
232 pr_debug("Spurious data end IRQ\n");
233 return;
234 }
235 stop = data->stop;
236
237 /* FIXME - return correct transfer count on errors */
238 if (!data->error)
239 data->bytes_xfered = data->blocks * data->blksz;
240 else
241 data->bytes_xfered = 0;
242
243 pr_debug("Completed data request\n");
244
245 /*FIXME - other drivers allow an optional stop command of any given type
246 * which we dont do, as the chip can auto generate them.
247 * Perhaps we can be smarter about when to use auto CMD12 and
248 * only issue the auto request when we know this is the desired
249 * stop command, allowing fallback to the stop command the
250 * upper layers expect. For now, we do what works.
251 */
252
253 if (data->flags & MMC_DATA_READ)
254 disable_mmc_irqs(ctl, TMIO_MASK_READOP);
255 else
256 disable_mmc_irqs(ctl, TMIO_MASK_WRITEOP);
257
258 if (stop) {
259 if (stop->opcode == 12 && !stop->arg)
260 tmio_iowrite16(0x000, ctl + CTL_STOP_INTERNAL_ACTION);
261 else
262 BUG();
263 }
264
265 tmio_mmc_finish_request(host);
266 }
267
tmio_mmc_cmd_irq(struct tmio_mmc_host * host,unsigned int stat)268 static inline void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
269 unsigned int stat)
270 {
271 void __iomem *ctl = host->ctl, *addr;
272 struct mmc_command *cmd = host->cmd;
273 int i;
274
275 if (!host->cmd) {
276 pr_debug("Spurious CMD irq\n");
277 return;
278 }
279
280 host->cmd = NULL;
281
282 /* This controller is sicker than the PXA one. Not only do we need to
283 * drop the top 8 bits of the first response word, we also need to
284 * modify the order of the response for short response command types.
285 */
286
287 for (i = 3, addr = ctl + CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
288 cmd->resp[i] = tmio_ioread32(addr);
289
290 if (cmd->flags & MMC_RSP_136) {
291 cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
292 cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
293 cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
294 cmd->resp[3] <<= 8;
295 } else if (cmd->flags & MMC_RSP_R3) {
296 cmd->resp[0] = cmd->resp[3];
297 }
298
299 if (stat & TMIO_STAT_CMDTIMEOUT)
300 cmd->error = -ETIMEDOUT;
301 else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
302 cmd->error = -EILSEQ;
303
304 /* If there is data to handle we enable data IRQs here, and
305 * we will ultimatley finish the request in the data_end handler.
306 * If theres no data or we encountered an error, finish now.
307 */
308 if (host->data && !cmd->error) {
309 if (host->data->flags & MMC_DATA_READ)
310 enable_mmc_irqs(ctl, TMIO_MASK_READOP);
311 else
312 enable_mmc_irqs(ctl, TMIO_MASK_WRITEOP);
313 } else {
314 tmio_mmc_finish_request(host);
315 }
316
317 return;
318 }
319
320
tmio_mmc_irq(int irq,void * devid)321 static irqreturn_t tmio_mmc_irq(int irq, void *devid)
322 {
323 struct tmio_mmc_host *host = devid;
324 void __iomem *ctl = host->ctl;
325 unsigned int ireg, irq_mask, status;
326
327 pr_debug("MMC IRQ begin\n");
328
329 status = tmio_ioread32(ctl + CTL_STATUS);
330 irq_mask = tmio_ioread32(ctl + CTL_IRQ_MASK);
331 ireg = status & TMIO_MASK_IRQ & ~irq_mask;
332
333 pr_debug_status(status);
334 pr_debug_status(ireg);
335
336 if (!ireg) {
337 disable_mmc_irqs(ctl, status & ~irq_mask);
338
339 pr_debug("tmio_mmc: Spurious irq, disabling! "
340 "0x%08x 0x%08x 0x%08x\n", status, irq_mask, ireg);
341 pr_debug_status(status);
342
343 goto out;
344 }
345
346 while (ireg) {
347 /* Card insert / remove attempts */
348 if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
349 ack_mmc_irqs(ctl, TMIO_STAT_CARD_INSERT |
350 TMIO_STAT_CARD_REMOVE);
351 mmc_detect_change(host->mmc, 0);
352 }
353
354 /* CRC and other errors */
355 /* if (ireg & TMIO_STAT_ERR_IRQ)
356 * handled |= tmio_error_irq(host, irq, stat);
357 */
358
359 /* Command completion */
360 if (ireg & TMIO_MASK_CMD) {
361 ack_mmc_irqs(ctl, TMIO_MASK_CMD);
362 tmio_mmc_cmd_irq(host, status);
363 }
364
365 /* Data transfer */
366 if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
367 ack_mmc_irqs(ctl, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
368 tmio_mmc_pio_irq(host);
369 }
370
371 /* Data transfer completion */
372 if (ireg & TMIO_STAT_DATAEND) {
373 ack_mmc_irqs(ctl, TMIO_STAT_DATAEND);
374 tmio_mmc_data_irq(host);
375 }
376
377 /* Check status - keep going until we've handled it all */
378 status = tmio_ioread32(ctl + CTL_STATUS);
379 irq_mask = tmio_ioread32(ctl + CTL_IRQ_MASK);
380 ireg = status & TMIO_MASK_IRQ & ~irq_mask;
381
382 pr_debug("Status at end of loop: %08x\n", status);
383 pr_debug_status(status);
384 }
385 pr_debug("MMC IRQ end\n");
386
387 out:
388 return IRQ_HANDLED;
389 }
390
tmio_mmc_start_data(struct tmio_mmc_host * host,struct mmc_data * data)391 static int tmio_mmc_start_data(struct tmio_mmc_host *host,
392 struct mmc_data *data)
393 {
394 void __iomem *ctl = host->ctl;
395
396 pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
397 data->blksz, data->blocks);
398
399 /* Hardware cannot perform 1 and 2 byte requests in 4 bit mode */
400 if (data->blksz < 4 && host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
401 printk(KERN_ERR "%s: %d byte block unsupported in 4 bit mode\n",
402 mmc_hostname(host->mmc), data->blksz);
403 return -EINVAL;
404 }
405
406 tmio_mmc_init_sg(host, data);
407 host->data = data;
408
409 /* Set transfer length / blocksize */
410 tmio_iowrite16(data->blksz, ctl + CTL_SD_XFER_LEN);
411 tmio_iowrite16(data->blocks, ctl + CTL_XFER_BLK_COUNT);
412
413 return 0;
414 }
415
416 /* Process requests from the MMC layer */
tmio_mmc_request(struct mmc_host * mmc,struct mmc_request * mrq)417 static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
418 {
419 struct tmio_mmc_host *host = mmc_priv(mmc);
420 int ret;
421
422 if (host->mrq)
423 pr_debug("request not null\n");
424
425 host->mrq = mrq;
426
427 if (mrq->data) {
428 ret = tmio_mmc_start_data(host, mrq->data);
429 if (ret)
430 goto fail;
431 }
432
433 ret = tmio_mmc_start_command(host, mrq->cmd);
434
435 if (!ret)
436 return;
437
438 fail:
439 mrq->cmd->error = ret;
440 mmc_request_done(mmc, mrq);
441 }
442
443 /* Set MMC clock / power.
444 * Note: This controller uses a simple divider scheme therefore it cannot
445 * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
446 * MMC wont run that fast, it has to be clocked at 12MHz which is the next
447 * slowest setting.
448 */
tmio_mmc_set_ios(struct mmc_host * mmc,struct mmc_ios * ios)449 static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
450 {
451 struct tmio_mmc_host *host = mmc_priv(mmc);
452 void __iomem *cnf = host->cnf;
453 void __iomem *ctl = host->ctl;
454
455 if (ios->clock)
456 tmio_mmc_set_clock(host, ios->clock);
457
458 /* Power sequence - OFF -> ON -> UP */
459 switch (ios->power_mode) {
460 case MMC_POWER_OFF: /* power down SD bus */
461 tmio_iowrite8(0x00, cnf + CNF_PWR_CTL_2);
462 tmio_mmc_clk_stop(host);
463 break;
464 case MMC_POWER_ON: /* power up SD bus */
465
466 tmio_iowrite8(0x02, cnf + CNF_PWR_CTL_2);
467 break;
468 case MMC_POWER_UP: /* start bus clock */
469 tmio_mmc_clk_start(host);
470 break;
471 }
472
473 switch (ios->bus_width) {
474 case MMC_BUS_WIDTH_1:
475 tmio_iowrite16(0x80e0, ctl + CTL_SD_MEM_CARD_OPT);
476 break;
477 case MMC_BUS_WIDTH_4:
478 tmio_iowrite16(0x00e0, ctl + CTL_SD_MEM_CARD_OPT);
479 break;
480 }
481
482 /* Let things settle. delay taken from winCE driver */
483 udelay(140);
484 }
485
tmio_mmc_get_ro(struct mmc_host * mmc)486 static int tmio_mmc_get_ro(struct mmc_host *mmc)
487 {
488 struct tmio_mmc_host *host = mmc_priv(mmc);
489 void __iomem *ctl = host->ctl;
490
491 return (tmio_ioread16(ctl + CTL_STATUS) & TMIO_STAT_WRPROTECT) ? 0 : 1;
492 }
493
494 static struct mmc_host_ops tmio_mmc_ops = {
495 .request = tmio_mmc_request,
496 .set_ios = tmio_mmc_set_ios,
497 .get_ro = tmio_mmc_get_ro,
498 };
499
500 #ifdef CONFIG_PM
tmio_mmc_suspend(struct platform_device * dev,pm_message_t state)501 static int tmio_mmc_suspend(struct platform_device *dev, pm_message_t state)
502 {
503 struct mfd_cell *cell = (struct mfd_cell *)dev->dev.platform_data;
504 struct mmc_host *mmc = platform_get_drvdata(dev);
505 int ret;
506
507 ret = mmc_suspend_host(mmc, state);
508
509 /* Tell MFD core it can disable us now.*/
510 if (!ret && cell->disable)
511 cell->disable(dev);
512
513 return ret;
514 }
515
tmio_mmc_resume(struct platform_device * dev)516 static int tmio_mmc_resume(struct platform_device *dev)
517 {
518 struct mfd_cell *cell = (struct mfd_cell *)dev->dev.platform_data;
519 struct mmc_host *mmc = platform_get_drvdata(dev);
520 struct tmio_mmc_host *host = mmc_priv(mmc);
521 void __iomem *cnf = host->cnf;
522 int ret = 0;
523
524 /* Enable the MMC/SD Control registers */
525 tmio_iowrite16(SDCREN, cnf + CNF_CMD);
526 tmio_iowrite32(dev->resource[0].start & 0xfffe, cnf + CNF_CTL_BASE);
527
528 /* Tell the MFD core we are ready to be enabled */
529 if (cell->enable) {
530 ret = cell->enable(dev);
531 if (ret)
532 goto out;
533 }
534
535 mmc_resume_host(mmc);
536
537 out:
538 return ret;
539 }
540 #else
541 #define tmio_mmc_suspend NULL
542 #define tmio_mmc_resume NULL
543 #endif
544
tmio_mmc_probe(struct platform_device * dev)545 static int __devinit tmio_mmc_probe(struct platform_device *dev)
546 {
547 struct mfd_cell *cell = (struct mfd_cell *)dev->dev.platform_data;
548 struct resource *res_ctl, *res_cnf;
549 struct tmio_mmc_host *host;
550 struct mmc_host *mmc;
551 int ret = -ENOMEM;
552
553 if (dev->num_resources != 3)
554 goto out;
555
556 res_ctl = platform_get_resource(dev, IORESOURCE_MEM, 0);
557 res_cnf = platform_get_resource(dev, IORESOURCE_MEM, 1);
558 if (!res_ctl || !res_cnf) {
559 ret = -EINVAL;
560 goto out;
561 }
562
563 mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &dev->dev);
564 if (!mmc)
565 goto out;
566
567 host = mmc_priv(mmc);
568 host->mmc = mmc;
569 platform_set_drvdata(dev, mmc);
570
571 host->ctl = ioremap(res_ctl->start, res_ctl->end - res_ctl->start);
572 if (!host->ctl)
573 goto host_free;
574
575 host->cnf = ioremap(res_cnf->start, res_cnf->end - res_cnf->start);
576 if (!host->cnf)
577 goto unmap_ctl;
578
579 mmc->ops = &tmio_mmc_ops;
580 mmc->caps = MMC_CAP_4_BIT_DATA;
581 mmc->f_min = 46875; /* 24000000 / 512 */
582 mmc->f_max = 24000000;
583 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
584
585 /* Enable the MMC/SD Control registers */
586 tmio_iowrite16(SDCREN, host->cnf + CNF_CMD);
587 tmio_iowrite32(dev->resource[0].start & 0xfffe,
588 host->cnf + CNF_CTL_BASE);
589
590 /* Tell the MFD core we are ready to be enabled */
591 if (cell->enable) {
592 ret = cell->enable(dev);
593 if (ret)
594 goto unmap_cnf;
595 }
596
597 /* Disable SD power during suspend */
598 tmio_iowrite8(0x01, host->cnf + CNF_PWR_CTL_3);
599
600 /* The below is required but why? FIXME */
601 tmio_iowrite8(0x1f, host->cnf + CNF_STOP_CLK_CTL);
602
603 /* Power down SD bus*/
604 tmio_iowrite8(0x0, host->cnf + CNF_PWR_CTL_2);
605
606 tmio_mmc_clk_stop(host);
607 reset(host);
608
609 ret = platform_get_irq(dev, 0);
610 if (ret >= 0)
611 host->irq = ret;
612 else
613 goto unmap_cnf;
614
615 disable_mmc_irqs(host->ctl, TMIO_MASK_ALL);
616
617 ret = request_irq(host->irq, tmio_mmc_irq, IRQF_DISABLED, "tmio-mmc",
618 host);
619 if (ret)
620 goto unmap_cnf;
621
622 set_irq_type(host->irq, IRQ_TYPE_EDGE_FALLING);
623
624 mmc_add_host(mmc);
625
626 printk(KERN_INFO "%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
627 (unsigned long)host->ctl, host->irq);
628
629 /* Unmask the IRQs we want to know about */
630 enable_mmc_irqs(host->ctl, TMIO_MASK_IRQ);
631
632 return 0;
633
634 unmap_cnf:
635 iounmap(host->cnf);
636 unmap_ctl:
637 iounmap(host->ctl);
638 host_free:
639 mmc_free_host(mmc);
640 out:
641 return ret;
642 }
643
tmio_mmc_remove(struct platform_device * dev)644 static int __devexit tmio_mmc_remove(struct platform_device *dev)
645 {
646 struct mmc_host *mmc = platform_get_drvdata(dev);
647
648 platform_set_drvdata(dev, NULL);
649
650 if (mmc) {
651 struct tmio_mmc_host *host = mmc_priv(mmc);
652 mmc_remove_host(mmc);
653 mmc_free_host(mmc);
654 free_irq(host->irq, host);
655 iounmap(host->ctl);
656 iounmap(host->cnf);
657 }
658
659 return 0;
660 }
661
662 /* ------------------- device registration ----------------------- */
663
664 static struct platform_driver tmio_mmc_driver = {
665 .driver = {
666 .name = "tmio-mmc",
667 .owner = THIS_MODULE,
668 },
669 .probe = tmio_mmc_probe,
670 .remove = __devexit_p(tmio_mmc_remove),
671 .suspend = tmio_mmc_suspend,
672 .resume = tmio_mmc_resume,
673 };
674
675
tmio_mmc_init(void)676 static int __init tmio_mmc_init(void)
677 {
678 return platform_driver_register(&tmio_mmc_driver);
679 }
680
tmio_mmc_exit(void)681 static void __exit tmio_mmc_exit(void)
682 {
683 platform_driver_unregister(&tmio_mmc_driver);
684 }
685
686 module_init(tmio_mmc_init);
687 module_exit(tmio_mmc_exit);
688
689 MODULE_DESCRIPTION("Toshiba TMIO SD/MMC driver");
690 MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
691 MODULE_LICENSE("GPL v2");
692 MODULE_ALIAS("platform:tmio-mmc");
693