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c405e93335e2676a282d5dfb957b06546cb0da41
[deliverable/linux.git] / drivers / mmc / host / msm_sdcc.c
1 /*
2 * linux/drivers/mmc/host/msm_sdcc.c - Qualcomm MSM 7X00A SDCC Driver
3 *
4 * Copyright (C) 2007 Google Inc,
5 * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved.
6 * Copyright (C) 2009, Code Aurora Forum. All Rights Reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * Based on mmci.c
13 *
14 * Author: San Mehat (san@android.com)
15 *
16 */
17
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <linux/device.h>
23 #include <linux/interrupt.h>
24 #include <linux/delay.h>
25 #include <linux/err.h>
26 #include <linux/highmem.h>
27 #include <linux/log2.h>
28 #include <linux/mmc/host.h>
29 #include <linux/mmc/card.h>
30 #include <linux/mmc/sdio.h>
31 #include <linux/clk.h>
32 #include <linux/scatterlist.h>
33 #include <linux/platform_device.h>
34 #include <linux/dma-mapping.h>
35 #include <linux/debugfs.h>
36 #include <linux/io.h>
37 #include <linux/memory.h>
38 #include <linux/gfp.h>
39 #include <linux/gpio.h>
40
41 #include <asm/cacheflush.h>
42 #include <asm/div64.h>
43 #include <asm/sizes.h>
44
45 #include <mach/mmc.h>
46 #include <mach/msm_iomap.h>
47 #include <mach/dma.h>
48 #include <mach/clk.h>
49
50 #include "msm_sdcc.h"
51
52 #define DRIVER_NAME "msm-sdcc"
53
54 #define BUSCLK_PWRSAVE 1
55 #define BUSCLK_TIMEOUT (HZ)
56 static unsigned int msmsdcc_fmin = 144000;
57 static unsigned int msmsdcc_fmax = 50000000;
58 static unsigned int msmsdcc_4bit = 1;
59 static unsigned int msmsdcc_pwrsave = 1;
60 static unsigned int msmsdcc_piopoll = 1;
61 static unsigned int msmsdcc_sdioirq;
62
63 #define PIO_SPINMAX 30
64 #define CMD_SPINMAX 20
65
66
67 static inline void
68 msmsdcc_disable_clocks(struct msmsdcc_host *host, int deferr)
69 {
70 WARN_ON(!host->clks_on);
71
72 BUG_ON(host->curr.mrq);
73
74 if (deferr) {
75 mod_timer(&host->busclk_timer, jiffies + BUSCLK_TIMEOUT);
76 } else {
77 del_timer_sync(&host->busclk_timer);
78 /* Need to check clks_on again in case the busclk
79 * timer fired
80 */
81 if (host->clks_on) {
82 clk_disable(host->clk);
83 clk_disable(host->pclk);
84 host->clks_on = 0;
85 }
86 }
87 }
88
89 static inline int
90 msmsdcc_enable_clocks(struct msmsdcc_host *host)
91 {
92 int rc;
93
94 del_timer_sync(&host->busclk_timer);
95
96 if (!host->clks_on) {
97 rc = clk_enable(host->pclk);
98 if (rc)
99 return rc;
100 rc = clk_enable(host->clk);
101 if (rc) {
102 clk_disable(host->pclk);
103 return rc;
104 }
105 udelay(1 + ((3 * USEC_PER_SEC) /
106 (host->clk_rate ? host->clk_rate : msmsdcc_fmin)));
107 host->clks_on = 1;
108 }
109 return 0;
110 }
111
112 static inline unsigned int
113 msmsdcc_readl(struct msmsdcc_host *host, unsigned int reg)
114 {
115 return readl(host->base + reg);
116 }
117
118 static inline void
119 msmsdcc_writel(struct msmsdcc_host *host, u32 data, unsigned int reg)
120 {
121 writel(data, host->base + reg);
122 /* 3 clk delay required! */
123 udelay(1 + ((3 * USEC_PER_SEC) /
124 (host->clk_rate ? host->clk_rate : msmsdcc_fmin)));
125 }
126
127 static void
128 msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd,
129 u32 c);
130
131 static void msmsdcc_reset_and_restore(struct msmsdcc_host *host)
132 {
133 u32 mci_clk = 0;
134 u32 mci_mask0 = 0;
135 int ret = 0;
136
137 /* Save the controller state */
138 mci_clk = readl(host->base + MMCICLOCK);
139 mci_mask0 = readl(host->base + MMCIMASK0);
140
141 /* Reset the controller */
142 ret = clk_reset(host->clk, CLK_RESET_ASSERT);
143 if (ret)
144 pr_err("%s: Clock assert failed at %u Hz with err %d\n",
145 mmc_hostname(host->mmc), host->clk_rate, ret);
146
147 ret = clk_reset(host->clk, CLK_RESET_DEASSERT);
148 if (ret)
149 pr_err("%s: Clock deassert failed at %u Hz with err %d\n",
150 mmc_hostname(host->mmc), host->clk_rate, ret);
151
152 pr_info("%s: Controller has been re-initialiazed\n",
153 mmc_hostname(host->mmc));
154
155 /* Restore the contoller state */
156 writel(host->pwr, host->base + MMCIPOWER);
157 writel(mci_clk, host->base + MMCICLOCK);
158 writel(mci_mask0, host->base + MMCIMASK0);
159 ret = clk_set_rate(host->clk, host->clk_rate);
160 if (ret)
161 pr_err("%s: Failed to set clk rate %u Hz (%d)\n",
162 mmc_hostname(host->mmc), host->clk_rate, ret);
163 }
164
165 static void
166 msmsdcc_request_end(struct msmsdcc_host *host, struct mmc_request *mrq)
167 {
168 BUG_ON(host->curr.data);
169
170 host->curr.mrq = NULL;
171 host->curr.cmd = NULL;
172
173 if (mrq->data)
174 mrq->data->bytes_xfered = host->curr.data_xfered;
175 if (mrq->cmd->error == -ETIMEDOUT)
176 mdelay(5);
177
178 #if BUSCLK_PWRSAVE
179 msmsdcc_disable_clocks(host, 1);
180 #endif
181 /*
182 * Need to drop the host lock here; mmc_request_done may call
183 * back into the driver...
184 */
185 spin_unlock(&host->lock);
186 mmc_request_done(host->mmc, mrq);
187 spin_lock(&host->lock);
188 }
189
190 static void
191 msmsdcc_stop_data(struct msmsdcc_host *host)
192 {
193 host->curr.data = NULL;
194 host->curr.got_dataend = 0;
195 }
196
197 uint32_t msmsdcc_fifo_addr(struct msmsdcc_host *host)
198 {
199 return host->memres->start + MMCIFIFO;
200 }
201
202 static inline void
203 msmsdcc_start_command_exec(struct msmsdcc_host *host, u32 arg, u32 c) {
204 msmsdcc_writel(host, arg, MMCIARGUMENT);
205 msmsdcc_writel(host, c, MMCICOMMAND);
206 }
207
208 static void
209 msmsdcc_dma_exec_func(struct msm_dmov_cmd *cmd)
210 {
211 struct msmsdcc_host *host = (struct msmsdcc_host *)cmd->data;
212
213 msmsdcc_writel(host, host->cmd_timeout, MMCIDATATIMER);
214 msmsdcc_writel(host, (unsigned int)host->curr.xfer_size,
215 MMCIDATALENGTH);
216 msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) &
217 (~MCI_IRQ_PIO)) | host->cmd_pio_irqmask, MMCIMASK0);
218 msmsdcc_writel(host, host->cmd_datactrl, MMCIDATACTRL);
219
220 if (host->cmd_cmd) {
221 msmsdcc_start_command_exec(host,
222 (u32) host->cmd_cmd->arg,
223 (u32) host->cmd_c);
224 }
225 host->dma.active = 1;
226 }
227
228 static void
229 msmsdcc_dma_complete_tlet(unsigned long data)
230 {
231 struct msmsdcc_host *host = (struct msmsdcc_host *)data;
232 unsigned long flags;
233 struct mmc_request *mrq;
234 struct msm_dmov_errdata err;
235
236 spin_lock_irqsave(&host->lock, flags);
237 host->dma.active = 0;
238
239 err = host->dma.err;
240 mrq = host->curr.mrq;
241 BUG_ON(!mrq);
242 WARN_ON(!mrq->data);
243
244 if (!(host->dma.result & DMOV_RSLT_VALID)) {
245 pr_err("msmsdcc: Invalid DataMover result\n");
246 goto out;
247 }
248
249 if (host->dma.result & DMOV_RSLT_DONE) {
250 host->curr.data_xfered = host->curr.xfer_size;
251 } else {
252 /* Error or flush */
253 if (host->dma.result & DMOV_RSLT_ERROR)
254 pr_err("%s: DMA error (0x%.8x)\n",
255 mmc_hostname(host->mmc), host->dma.result);
256 if (host->dma.result & DMOV_RSLT_FLUSH)
257 pr_err("%s: DMA channel flushed (0x%.8x)\n",
258 mmc_hostname(host->mmc), host->dma.result);
259
260 pr_err("Flush data: %.8x %.8x %.8x %.8x %.8x %.8x\n",
261 err.flush[0], err.flush[1], err.flush[2],
262 err.flush[3], err.flush[4], err.flush[5]);
263
264 msmsdcc_reset_and_restore(host);
265 if (!mrq->data->error)
266 mrq->data->error = -EIO;
267 }
268 dma_unmap_sg(mmc_dev(host->mmc), host->dma.sg, host->dma.num_ents,
269 host->dma.dir);
270
271 host->dma.sg = NULL;
272 host->dma.busy = 0;
273
274 if (host->curr.got_dataend || mrq->data->error) {
275
276 /*
277 * If we've already gotten our DATAEND / DATABLKEND
278 * for this request, then complete it through here.
279 */
280 msmsdcc_stop_data(host);
281
282 if (!mrq->data->error)
283 host->curr.data_xfered = host->curr.xfer_size;
284 if (!mrq->data->stop || mrq->cmd->error) {
285 host->curr.mrq = NULL;
286 host->curr.cmd = NULL;
287 mrq->data->bytes_xfered = host->curr.data_xfered;
288
289 spin_unlock_irqrestore(&host->lock, flags);
290 #if BUSCLK_PWRSAVE
291 msmsdcc_disable_clocks(host, 1);
292 #endif
293 mmc_request_done(host->mmc, mrq);
294 return;
295 } else
296 msmsdcc_start_command(host, mrq->data->stop, 0);
297 }
298
299 out:
300 spin_unlock_irqrestore(&host->lock, flags);
301 return;
302 }
303
304 static void
305 msmsdcc_dma_complete_func(struct msm_dmov_cmd *cmd,
306 unsigned int result,
307 struct msm_dmov_errdata *err)
308 {
309 struct msmsdcc_dma_data *dma_data =
310 container_of(cmd, struct msmsdcc_dma_data, hdr);
311 struct msmsdcc_host *host = dma_data->host;
312
313 dma_data->result = result;
314 if (err)
315 memcpy(&dma_data->err, err, sizeof(struct msm_dmov_errdata));
316
317 tasklet_schedule(&host->dma_tlet);
318 }
319
320 static int validate_dma(struct msmsdcc_host *host, struct mmc_data *data)
321 {
322 if (host->dma.channel == -1)
323 return -ENOENT;
324
325 if ((data->blksz * data->blocks) < MCI_FIFOSIZE)
326 return -EINVAL;
327 if ((data->blksz * data->blocks) % MCI_FIFOSIZE)
328 return -EINVAL;
329 return 0;
330 }
331
332 static int msmsdcc_config_dma(struct msmsdcc_host *host, struct mmc_data *data)
333 {
334 struct msmsdcc_nc_dmadata *nc;
335 dmov_box *box;
336 uint32_t rows;
337 uint32_t crci;
338 unsigned int n;
339 int i, rc;
340 struct scatterlist *sg = data->sg;
341
342 rc = validate_dma(host, data);
343 if (rc)
344 return rc;
345
346 host->dma.sg = data->sg;
347 host->dma.num_ents = data->sg_len;
348
349 BUG_ON(host->dma.num_ents > NR_SG); /* Prevent memory corruption */
350
351 nc = host->dma.nc;
352
353 switch (host->pdev_id) {
354 case 1:
355 crci = MSMSDCC_CRCI_SDC1;
356 break;
357 case 2:
358 crci = MSMSDCC_CRCI_SDC2;
359 break;
360 case 3:
361 crci = MSMSDCC_CRCI_SDC3;
362 break;
363 case 4:
364 crci = MSMSDCC_CRCI_SDC4;
365 break;
366 default:
367 host->dma.sg = NULL;
368 host->dma.num_ents = 0;
369 return -ENOENT;
370 }
371
372 if (data->flags & MMC_DATA_READ)
373 host->dma.dir = DMA_FROM_DEVICE;
374 else
375 host->dma.dir = DMA_TO_DEVICE;
376
377 host->curr.user_pages = 0;
378
379 box = &nc->cmd[0];
380
381 /* location of command block must be 64 bit aligned */
382 BUG_ON(host->dma.cmd_busaddr & 0x07);
383
384 nc->cmdptr = (host->dma.cmd_busaddr >> 3) | CMD_PTR_LP;
385 host->dma.hdr.cmdptr = DMOV_CMD_PTR_LIST |
386 DMOV_CMD_ADDR(host->dma.cmdptr_busaddr);
387 host->dma.hdr.complete_func = msmsdcc_dma_complete_func;
388
389 n = dma_map_sg(mmc_dev(host->mmc), host->dma.sg,
390 host->dma.num_ents, host->dma.dir);
391 if (n == 0) {
392 printk(KERN_ERR "%s: Unable to map in all sg elements\n",
393 mmc_hostname(host->mmc));
394 host->dma.sg = NULL;
395 host->dma.num_ents = 0;
396 return -ENOMEM;
397 }
398
399 for_each_sg(host->dma.sg, sg, n, i) {
400
401 box->cmd = CMD_MODE_BOX;
402
403 if (i == n - 1)
404 box->cmd |= CMD_LC;
405 rows = (sg_dma_len(sg) % MCI_FIFOSIZE) ?
406 (sg_dma_len(sg) / MCI_FIFOSIZE) + 1 :
407 (sg_dma_len(sg) / MCI_FIFOSIZE) ;
408
409 if (data->flags & MMC_DATA_READ) {
410 box->src_row_addr = msmsdcc_fifo_addr(host);
411 box->dst_row_addr = sg_dma_address(sg);
412
413 box->src_dst_len = (MCI_FIFOSIZE << 16) |
414 (MCI_FIFOSIZE);
415 box->row_offset = MCI_FIFOSIZE;
416
417 box->num_rows = rows * ((1 << 16) + 1);
418 box->cmd |= CMD_SRC_CRCI(crci);
419 } else {
420 box->src_row_addr = sg_dma_address(sg);
421 box->dst_row_addr = msmsdcc_fifo_addr(host);
422
423 box->src_dst_len = (MCI_FIFOSIZE << 16) |
424 (MCI_FIFOSIZE);
425 box->row_offset = (MCI_FIFOSIZE << 16);
426
427 box->num_rows = rows * ((1 << 16) + 1);
428 box->cmd |= CMD_DST_CRCI(crci);
429 }
430 box++;
431 }
432
433 return 0;
434 }
435
436 static int
437 snoop_cccr_abort(struct mmc_command *cmd)
438 {
439 if ((cmd->opcode == 52) &&
440 (cmd->arg & 0x80000000) &&
441 (((cmd->arg >> 9) & 0x1ffff) == SDIO_CCCR_ABORT))
442 return 1;
443 return 0;
444 }
445
446 static void
447 msmsdcc_start_command_deferred(struct msmsdcc_host *host,
448 struct mmc_command *cmd, u32 *c)
449 {
450 *c |= (cmd->opcode | MCI_CPSM_ENABLE);
451
452 if (cmd->flags & MMC_RSP_PRESENT) {
453 if (cmd->flags & MMC_RSP_136)
454 *c |= MCI_CPSM_LONGRSP;
455 *c |= MCI_CPSM_RESPONSE;
456 }
457
458 if (/*interrupt*/0)
459 *c |= MCI_CPSM_INTERRUPT;
460
461 if ((((cmd->opcode == 17) || (cmd->opcode == 18)) ||
462 ((cmd->opcode == 24) || (cmd->opcode == 25))) ||
463 (cmd->opcode == 53))
464 *c |= MCI_CSPM_DATCMD;
465
466 if (host->prog_scan && (cmd->opcode == 12)) {
467 *c |= MCI_CPSM_PROGENA;
468 host->prog_enable = true;
469 }
470
471 if (cmd == cmd->mrq->stop)
472 *c |= MCI_CSPM_MCIABORT;
473
474 if (snoop_cccr_abort(cmd))
475 *c |= MCI_CSPM_MCIABORT;
476
477 if (host->curr.cmd != NULL) {
478 printk(KERN_ERR "%s: Overlapping command requests\n",
479 mmc_hostname(host->mmc));
480 }
481 host->curr.cmd = cmd;
482 }
483
484 static void
485 msmsdcc_start_data(struct msmsdcc_host *host, struct mmc_data *data,
486 struct mmc_command *cmd, u32 c)
487 {
488 unsigned int datactrl, timeout;
489 unsigned long long clks;
490 unsigned int pio_irqmask = 0;
491
492 host->curr.data = data;
493 host->curr.xfer_size = data->blksz * data->blocks;
494 host->curr.xfer_remain = host->curr.xfer_size;
495 host->curr.data_xfered = 0;
496 host->curr.got_dataend = 0;
497
498 memset(&host->pio, 0, sizeof(host->pio));
499
500 datactrl = MCI_DPSM_ENABLE | (data->blksz << 4);
501
502 if (!msmsdcc_config_dma(host, data))
503 datactrl |= MCI_DPSM_DMAENABLE;
504 else {
505 host->pio.sg = data->sg;
506 host->pio.sg_len = data->sg_len;
507 host->pio.sg_off = 0;
508
509 if (data->flags & MMC_DATA_READ) {
510 pio_irqmask = MCI_RXFIFOHALFFULLMASK;
511 if (host->curr.xfer_remain < MCI_FIFOSIZE)
512 pio_irqmask |= MCI_RXDATAAVLBLMASK;
513 } else
514 pio_irqmask = MCI_TXFIFOHALFEMPTYMASK;
515 }
516
517 if (data->flags & MMC_DATA_READ)
518 datactrl |= MCI_DPSM_DIRECTION;
519
520 clks = (unsigned long long)data->timeout_ns * host->clk_rate;
521 do_div(clks, NSEC_PER_SEC);
522 timeout = data->timeout_clks + (unsigned int)clks*2 ;
523
524 if (datactrl & MCI_DPSM_DMAENABLE) {
525 /* Save parameters for the exec function */
526 host->cmd_timeout = timeout;
527 host->cmd_pio_irqmask = pio_irqmask;
528 host->cmd_datactrl = datactrl;
529 host->cmd_cmd = cmd;
530
531 host->dma.hdr.execute_func = msmsdcc_dma_exec_func;
532 host->dma.hdr.data = (void *)host;
533 host->dma.busy = 1;
534
535 if (cmd) {
536 msmsdcc_start_command_deferred(host, cmd, &c);
537 host->cmd_c = c;
538 }
539 msm_dmov_enqueue_cmd(host->dma.channel, &host->dma.hdr);
540 if (data->flags & MMC_DATA_WRITE)
541 host->prog_scan = true;
542 } else {
543 msmsdcc_writel(host, timeout, MMCIDATATIMER);
544
545 msmsdcc_writel(host, host->curr.xfer_size, MMCIDATALENGTH);
546
547 msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) &
548 (~MCI_IRQ_PIO)) | pio_irqmask, MMCIMASK0);
549
550 msmsdcc_writel(host, datactrl, MMCIDATACTRL);
551
552 if (cmd) {
553 /* Daisy-chain the command if requested */
554 msmsdcc_start_command(host, cmd, c);
555 }
556 }
557 }
558
559 static void
560 msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd, u32 c)
561 {
562 if (cmd == cmd->mrq->stop)
563 c |= MCI_CSPM_MCIABORT;
564
565 host->stats.cmds++;
566
567 msmsdcc_start_command_deferred(host, cmd, &c);
568 msmsdcc_start_command_exec(host, cmd->arg, c);
569 }
570
571 static void
572 msmsdcc_data_err(struct msmsdcc_host *host, struct mmc_data *data,
573 unsigned int status)
574 {
575 if (status & MCI_DATACRCFAIL) {
576 pr_err("%s: Data CRC error\n", mmc_hostname(host->mmc));
577 pr_err("%s: opcode 0x%.8x\n", __func__,
578 data->mrq->cmd->opcode);
579 pr_err("%s: blksz %d, blocks %d\n", __func__,
580 data->blksz, data->blocks);
581 data->error = -EILSEQ;
582 } else if (status & MCI_DATATIMEOUT) {
583 pr_err("%s: Data timeout\n", mmc_hostname(host->mmc));
584 data->error = -ETIMEDOUT;
585 } else if (status & MCI_RXOVERRUN) {
586 pr_err("%s: RX overrun\n", mmc_hostname(host->mmc));
587 data->error = -EIO;
588 } else if (status & MCI_TXUNDERRUN) {
589 pr_err("%s: TX underrun\n", mmc_hostname(host->mmc));
590 data->error = -EIO;
591 } else {
592 pr_err("%s: Unknown error (0x%.8x)\n",
593 mmc_hostname(host->mmc), status);
594 data->error = -EIO;
595 }
596 }
597
598
599 static int
600 msmsdcc_pio_read(struct msmsdcc_host *host, char *buffer, unsigned int remain)
601 {
602 uint32_t *ptr = (uint32_t *) buffer;
603 int count = 0;
604
605 if (remain % 4)
606 remain = ((remain >> 2) + 1) << 2;
607
608 while (msmsdcc_readl(host, MMCISTATUS) & MCI_RXDATAAVLBL) {
609 *ptr = msmsdcc_readl(host, MMCIFIFO + (count % MCI_FIFOSIZE));
610 ptr++;
611 count += sizeof(uint32_t);
612
613 remain -= sizeof(uint32_t);
614 if (remain == 0)
615 break;
616 }
617 return count;
618 }
619
620 static int
621 msmsdcc_pio_write(struct msmsdcc_host *host, char *buffer,
622 unsigned int remain, u32 status)
623 {
624 void __iomem *base = host->base;
625 char *ptr = buffer;
626
627 do {
628 unsigned int count, maxcnt, sz;
629
630 maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE :
631 MCI_FIFOHALFSIZE;
632 count = min(remain, maxcnt);
633
634 sz = count % 4 ? (count >> 2) + 1 : (count >> 2);
635 writesl(base + MMCIFIFO, ptr, sz);
636 ptr += count;
637 remain -= count;
638
639 if (remain == 0)
640 break;
641
642 status = msmsdcc_readl(host, MMCISTATUS);
643 } while (status & MCI_TXFIFOHALFEMPTY);
644
645 return ptr - buffer;
646 }
647
648 static int
649 msmsdcc_spin_on_status(struct msmsdcc_host *host, uint32_t mask, int maxspin)
650 {
651 while (maxspin) {
652 if ((msmsdcc_readl(host, MMCISTATUS) & mask))
653 return 0;
654 udelay(1);
655 --maxspin;
656 }
657 return -ETIMEDOUT;
658 }
659
660 static irqreturn_t
661 msmsdcc_pio_irq(int irq, void *dev_id)
662 {
663 struct msmsdcc_host *host = dev_id;
664 uint32_t status;
665 u32 mci_mask0;
666
667 status = msmsdcc_readl(host, MMCISTATUS);
668 mci_mask0 = msmsdcc_readl(host, MMCIMASK0);
669
670 if (((mci_mask0 & status) & MCI_IRQ_PIO) == 0)
671 return IRQ_NONE;
672
673 do {
674 unsigned long flags;
675 unsigned int remain, len;
676 char *buffer;
677
678 if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) {
679 if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll)
680 break;
681
682 if (msmsdcc_spin_on_status(host,
683 (MCI_TXFIFOHALFEMPTY |
684 MCI_RXDATAAVLBL),
685 PIO_SPINMAX)) {
686 break;
687 }
688 }
689
690 /* Map the current scatter buffer */
691 local_irq_save(flags);
692 buffer = kmap_atomic(sg_page(host->pio.sg),
693 KM_BIO_SRC_IRQ) + host->pio.sg->offset;
694 buffer += host->pio.sg_off;
695 remain = host->pio.sg->length - host->pio.sg_off;
696 len = 0;
697 if (status & MCI_RXACTIVE)
698 len = msmsdcc_pio_read(host, buffer, remain);
699 if (status & MCI_TXACTIVE)
700 len = msmsdcc_pio_write(host, buffer, remain, status);
701
702 /* Unmap the buffer */
703 kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
704 local_irq_restore(flags);
705
706 host->pio.sg_off += len;
707 host->curr.xfer_remain -= len;
708 host->curr.data_xfered += len;
709 remain -= len;
710
711 if (remain == 0) {
712 /* This sg page is full - do some housekeeping */
713 if (status & MCI_RXACTIVE && host->curr.user_pages)
714 flush_dcache_page(sg_page(host->pio.sg));
715
716 if (!--host->pio.sg_len) {
717 memset(&host->pio, 0, sizeof(host->pio));
718 break;
719 }
720
721 /* Advance to next sg */
722 host->pio.sg++;
723 host->pio.sg_off = 0;
724 }
725
726 status = msmsdcc_readl(host, MMCISTATUS);
727 } while (1);
728
729 if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE)
730 msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) |
731 MCI_RXDATAAVLBLMASK, MMCIMASK0);
732
733 if (!host->curr.xfer_remain)
734 msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) | 0,
735 MMCIMASK0);
736
737 return IRQ_HANDLED;
738 }
739
740 static void msmsdcc_do_cmdirq(struct msmsdcc_host *host, uint32_t status)
741 {
742 struct mmc_command *cmd = host->curr.cmd;
743
744 host->curr.cmd = NULL;
745 cmd->resp[0] = msmsdcc_readl(host, MMCIRESPONSE0);
746 cmd->resp[1] = msmsdcc_readl(host, MMCIRESPONSE1);
747 cmd->resp[2] = msmsdcc_readl(host, MMCIRESPONSE2);
748 cmd->resp[3] = msmsdcc_readl(host, MMCIRESPONSE3);
749
750 if (status & MCI_CMDTIMEOUT) {
751 cmd->error = -ETIMEDOUT;
752 } else if (status & MCI_CMDCRCFAIL &&
753 cmd->flags & MMC_RSP_CRC) {
754 pr_err("%s: Command CRC error\n", mmc_hostname(host->mmc));
755 cmd->error = -EILSEQ;
756 }
757
758 if (!cmd->data || cmd->error) {
759 if (host->curr.data && host->dma.sg)
760 msm_dmov_stop_cmd(host->dma.channel,
761 &host->dma.hdr, 0);
762 else if (host->curr.data) { /* Non DMA */
763 msmsdcc_reset_and_restore(host);
764 msmsdcc_stop_data(host);
765 msmsdcc_request_end(host, cmd->mrq);
766 } else { /* host->data == NULL */
767 if (!cmd->error && host->prog_enable) {
768 if (status & MCI_PROGDONE) {
769 host->prog_scan = false;
770 host->prog_enable = false;
771 msmsdcc_request_end(host, cmd->mrq);
772 } else {
773 host->curr.cmd = cmd;
774 }
775 } else {
776 if (host->prog_enable) {
777 host->prog_scan = false;
778 host->prog_enable = false;
779 }
780 msmsdcc_request_end(host, cmd->mrq);
781 }
782 }
783 } else if (cmd->data)
784 if (!(cmd->data->flags & MMC_DATA_READ))
785 msmsdcc_start_data(host, cmd->data,
786 NULL, 0);
787 }
788
789 static void
790 msmsdcc_handle_irq_data(struct msmsdcc_host *host, u32 status,
791 void __iomem *base)
792 {
793 struct mmc_data *data = host->curr.data;
794
795 if (status & (MCI_CMDSENT | MCI_CMDRESPEND | MCI_CMDCRCFAIL |
796 MCI_CMDTIMEOUT | MCI_PROGDONE) && host->curr.cmd) {
797 msmsdcc_do_cmdirq(host, status);
798 }
799
800 if (!data)
801 return;
802
803 /* Check for data errors */
804 if (status & (MCI_DATACRCFAIL | MCI_DATATIMEOUT |
805 MCI_TXUNDERRUN | MCI_RXOVERRUN)) {
806 msmsdcc_data_err(host, data, status);
807 host->curr.data_xfered = 0;
808 if (host->dma.sg)
809 msm_dmov_stop_cmd(host->dma.channel,
810 &host->dma.hdr, 0);
811 else {
812 msmsdcc_reset_and_restore(host);
813 if (host->curr.data)
814 msmsdcc_stop_data(host);
815 if (!data->stop)
816 msmsdcc_request_end(host, data->mrq);
817 else
818 msmsdcc_start_command(host, data->stop, 0);
819 }
820 }
821
822 /* Check for data done */
823 if (!host->curr.got_dataend && (status & MCI_DATAEND))
824 host->curr.got_dataend = 1;
825
826 /*
827 * If DMA is still in progress, we complete via the completion handler
828 */
829 if (host->curr.got_dataend && !host->dma.busy) {
830 /*
831 * There appears to be an issue in the controller where
832 * if you request a small block transfer (< fifo size),
833 * you may get your DATAEND/DATABLKEND irq without the
834 * PIO data irq.
835 *
836 * Check to see if there is still data to be read,
837 * and simulate a PIO irq.
838 */
839 if (readl(base + MMCISTATUS) & MCI_RXDATAAVLBL)
840 msmsdcc_pio_irq(1, host);
841
842 msmsdcc_stop_data(host);
843 if (!data->error)
844 host->curr.data_xfered = host->curr.xfer_size;
845
846 if (!data->stop)
847 msmsdcc_request_end(host, data->mrq);
848 else
849 msmsdcc_start_command(host, data->stop, 0);
850 }
851 }
852
853 static irqreturn_t
854 msmsdcc_irq(int irq, void *dev_id)
855 {
856 struct msmsdcc_host *host = dev_id;
857 void __iomem *base = host->base;
858 u32 status;
859 int ret = 0;
860 int cardint = 0;
861
862 spin_lock(&host->lock);
863
864 do {
865 status = msmsdcc_readl(host, MMCISTATUS);
866 status &= msmsdcc_readl(host, MMCIMASK0);
867 if ((status & (~MCI_IRQ_PIO)) == 0)
868 break;
869 msmsdcc_writel(host, status, MMCICLEAR);
870
871 if (status & MCI_SDIOINTR)
872 status &= ~MCI_SDIOINTR;
873
874 if (!status)
875 break;
876
877 msmsdcc_handle_irq_data(host, status, base);
878
879 if (status & MCI_SDIOINTOPER) {
880 cardint = 1;
881 status &= ~MCI_SDIOINTOPER;
882 }
883 ret = 1;
884 } while (status);
885
886 spin_unlock(&host->lock);
887
888 /*
889 * We have to delay handling the card interrupt as it calls
890 * back into the driver.
891 */
892 if (cardint)
893 mmc_signal_sdio_irq(host->mmc);
894
895 return IRQ_RETVAL(ret);
896 }
897
898 static void
899 msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq)
900 {
901 struct msmsdcc_host *host = mmc_priv(mmc);
902 unsigned long flags;
903
904 WARN_ON(host->curr.mrq != NULL);
905 WARN_ON(host->pwr == 0);
906
907 spin_lock_irqsave(&host->lock, flags);
908
909 host->stats.reqs++;
910
911 if (host->eject) {
912 if (mrq->data && !(mrq->data->flags & MMC_DATA_READ)) {
913 mrq->cmd->error = 0;
914 mrq->data->bytes_xfered = mrq->data->blksz *
915 mrq->data->blocks;
916 } else
917 mrq->cmd->error = -ENOMEDIUM;
918
919 spin_unlock_irqrestore(&host->lock, flags);
920 mmc_request_done(mmc, mrq);
921 return;
922 }
923
924 msmsdcc_enable_clocks(host);
925
926 host->curr.mrq = mrq;
927
928 if (mrq->data && mrq->data->flags & MMC_DATA_READ)
929 /* Queue/read data, daisy-chain command when data starts */
930 msmsdcc_start_data(host, mrq->data, mrq->cmd, 0);
931 else
932 msmsdcc_start_command(host, mrq->cmd, 0);
933
934 if (host->cmdpoll && !msmsdcc_spin_on_status(host,
935 MCI_CMDRESPEND|MCI_CMDCRCFAIL|MCI_CMDTIMEOUT,
936 CMD_SPINMAX)) {
937 uint32_t status = msmsdcc_readl(host, MMCISTATUS);
938 msmsdcc_do_cmdirq(host, status);
939 msmsdcc_writel(host,
940 MCI_CMDRESPEND | MCI_CMDCRCFAIL | MCI_CMDTIMEOUT,
941 MMCICLEAR);
942 host->stats.cmdpoll_hits++;
943 } else {
944 host->stats.cmdpoll_misses++;
945 }
946 spin_unlock_irqrestore(&host->lock, flags);
947 }
948
949 static void msmsdcc_setup_gpio(struct msmsdcc_host *host, bool enable)
950 {
951 struct msm_mmc_gpio_data *curr;
952 int i, rc = 0;
953
954 if (!host->plat->gpio_data || host->gpio_config_status == enable)
955 return;
956
957 curr = host->plat->gpio_data;
958 for (i = 0; i < curr->size; i++) {
959 if (enable) {
960 rc = gpio_request(curr->gpio[i].no,
961 curr->gpio[i].name);
962 if (rc) {
963 pr_err("%s: gpio_request(%d, %s) failed %d\n",
964 mmc_hostname(host->mmc),
965 curr->gpio[i].no,
966 curr->gpio[i].name, rc);
967 goto free_gpios;
968 }
969 } else {
970 gpio_free(curr->gpio[i].no);
971 }
972 }
973 host->gpio_config_status = enable;
974 return;
975
976 free_gpios:
977 for (; i >= 0; i--)
978 gpio_free(curr->gpio[i].no);
979 }
980
981 static void
982 msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
983 {
984 struct msmsdcc_host *host = mmc_priv(mmc);
985 u32 clk = 0, pwr = 0;
986 int rc;
987 unsigned long flags;
988
989 spin_lock_irqsave(&host->lock, flags);
990
991 msmsdcc_enable_clocks(host);
992
993 spin_unlock_irqrestore(&host->lock, flags);
994
995 if (ios->clock) {
996 if (ios->clock != host->clk_rate) {
997 rc = clk_set_rate(host->clk, ios->clock);
998 if (rc < 0)
999 pr_err("%s: Error setting clock rate (%d)\n",
1000 mmc_hostname(host->mmc), rc);
1001 else
1002 host->clk_rate = ios->clock;
1003 }
1004 clk |= MCI_CLK_ENABLE;
1005 }
1006
1007 if (ios->bus_width == MMC_BUS_WIDTH_4)
1008 clk |= (2 << 10); /* Set WIDEBUS */
1009
1010 if (ios->clock > 400000 && msmsdcc_pwrsave)
1011 clk |= (1 << 9); /* PWRSAVE */
1012
1013 clk |= (1 << 12); /* FLOW_ENA */
1014 clk |= (1 << 15); /* feedback clock */
1015
1016 if (host->plat->translate_vdd)
1017 pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
1018
1019 switch (ios->power_mode) {
1020 case MMC_POWER_OFF:
1021 msmsdcc_setup_gpio(host, false);
1022 break;
1023 case MMC_POWER_UP:
1024 pwr |= MCI_PWR_UP;
1025 msmsdcc_setup_gpio(host, true);
1026 break;
1027 case MMC_POWER_ON:
1028 pwr |= MCI_PWR_ON;
1029 break;
1030 }
1031
1032 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
1033 pwr |= MCI_OD;
1034
1035 msmsdcc_writel(host, clk, MMCICLOCK);
1036
1037 if (host->pwr != pwr) {
1038 host->pwr = pwr;
1039 msmsdcc_writel(host, pwr, MMCIPOWER);
1040 }
1041 #if BUSCLK_PWRSAVE
1042 spin_lock_irqsave(&host->lock, flags);
1043 msmsdcc_disable_clocks(host, 1);
1044 spin_unlock_irqrestore(&host->lock, flags);
1045 #endif
1046 }
1047
1048 static void msmsdcc_enable_sdio_irq(struct mmc_host *mmc, int enable)
1049 {
1050 struct msmsdcc_host *host = mmc_priv(mmc);
1051 unsigned long flags;
1052 u32 status;
1053
1054 spin_lock_irqsave(&host->lock, flags);
1055 if (msmsdcc_sdioirq == 1) {
1056 status = msmsdcc_readl(host, MMCIMASK0);
1057 if (enable)
1058 status |= MCI_SDIOINTOPERMASK;
1059 else
1060 status &= ~MCI_SDIOINTOPERMASK;
1061 host->saved_irq0mask = status;
1062 msmsdcc_writel(host, status, MMCIMASK0);
1063 }
1064 spin_unlock_irqrestore(&host->lock, flags);
1065 }
1066
1067 static void msmsdcc_init_card(struct mmc_host *mmc, struct mmc_card *card)
1068 {
1069 struct msmsdcc_host *host = mmc_priv(mmc);
1070
1071 if (host->plat->init_card)
1072 host->plat->init_card(card);
1073 }
1074
1075 static const struct mmc_host_ops msmsdcc_ops = {
1076 .request = msmsdcc_request,
1077 .set_ios = msmsdcc_set_ios,
1078 .enable_sdio_irq = msmsdcc_enable_sdio_irq,
1079 .init_card = msmsdcc_init_card,
1080 };
1081
1082 static void
1083 msmsdcc_check_status(unsigned long data)
1084 {
1085 struct msmsdcc_host *host = (struct msmsdcc_host *)data;
1086 unsigned int status;
1087
1088 if (!host->plat->status) {
1089 mmc_detect_change(host->mmc, 0);
1090 goto out;
1091 }
1092
1093 status = host->plat->status(mmc_dev(host->mmc));
1094 host->eject = !status;
1095 if (status ^ host->oldstat) {
1096 pr_info("%s: Slot status change detected (%d -> %d)\n",
1097 mmc_hostname(host->mmc), host->oldstat, status);
1098 if (status)
1099 mmc_detect_change(host->mmc, (5 * HZ) / 2);
1100 else
1101 mmc_detect_change(host->mmc, 0);
1102 }
1103
1104 host->oldstat = status;
1105
1106 out:
1107 if (host->timer.function)
1108 mod_timer(&host->timer, jiffies + HZ);
1109 }
1110
1111 static irqreturn_t
1112 msmsdcc_platform_status_irq(int irq, void *dev_id)
1113 {
1114 struct msmsdcc_host *host = dev_id;
1115
1116 printk(KERN_DEBUG "%s: %d\n", __func__, irq);
1117 msmsdcc_check_status((unsigned long) host);
1118 return IRQ_HANDLED;
1119 }
1120
1121 static void
1122 msmsdcc_status_notify_cb(int card_present, void *dev_id)
1123 {
1124 struct msmsdcc_host *host = dev_id;
1125
1126 printk(KERN_DEBUG "%s: card_present %d\n", mmc_hostname(host->mmc),
1127 card_present);
1128 msmsdcc_check_status((unsigned long) host);
1129 }
1130
1131 static void
1132 msmsdcc_busclk_expired(unsigned long _data)
1133 {
1134 struct msmsdcc_host *host = (struct msmsdcc_host *) _data;
1135
1136 if (host->clks_on)
1137 msmsdcc_disable_clocks(host, 0);
1138 }
1139
1140 static int
1141 msmsdcc_init_dma(struct msmsdcc_host *host)
1142 {
1143 memset(&host->dma, 0, sizeof(struct msmsdcc_dma_data));
1144 host->dma.host = host;
1145 host->dma.channel = -1;
1146
1147 if (!host->dmares)
1148 return -ENODEV;
1149
1150 host->dma.nc = dma_alloc_coherent(NULL,
1151 sizeof(struct msmsdcc_nc_dmadata),
1152 &host->dma.nc_busaddr,
1153 GFP_KERNEL);
1154 if (host->dma.nc == NULL) {
1155 pr_err("Unable to allocate DMA buffer\n");
1156 return -ENOMEM;
1157 }
1158 memset(host->dma.nc, 0x00, sizeof(struct msmsdcc_nc_dmadata));
1159 host->dma.cmd_busaddr = host->dma.nc_busaddr;
1160 host->dma.cmdptr_busaddr = host->dma.nc_busaddr +
1161 offsetof(struct msmsdcc_nc_dmadata, cmdptr);
1162 host->dma.channel = host->dmares->start;
1163
1164 return 0;
1165 }
1166
1167 static int
1168 msmsdcc_probe(struct platform_device *pdev)
1169 {
1170 struct msm_mmc_platform_data *plat = pdev->dev.platform_data;
1171 struct msmsdcc_host *host;
1172 struct mmc_host *mmc;
1173 struct resource *cmd_irqres = NULL;
1174 struct resource *stat_irqres = NULL;
1175 struct resource *memres = NULL;
1176 struct resource *dmares = NULL;
1177 int ret;
1178
1179 /* must have platform data */
1180 if (!plat) {
1181 pr_err("%s: Platform data not available\n", __func__);
1182 ret = -EINVAL;
1183 goto out;
1184 }
1185
1186 if (pdev->id < 1 || pdev->id > 4)
1187 return -EINVAL;
1188
1189 if (pdev->resource == NULL || pdev->num_resources < 2) {
1190 pr_err("%s: Invalid resource\n", __func__);
1191 return -ENXIO;
1192 }
1193
1194 memres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1195 dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1196 cmd_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1197 "cmd_irq");
1198 stat_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1199 "status_irq");
1200
1201 if (!cmd_irqres || !memres) {
1202 pr_err("%s: Invalid resource\n", __func__);
1203 return -ENXIO;
1204 }
1205
1206 /*
1207 * Setup our host structure
1208 */
1209
1210 mmc = mmc_alloc_host(sizeof(struct msmsdcc_host), &pdev->dev);
1211 if (!mmc) {
1212 ret = -ENOMEM;
1213 goto out;
1214 }
1215
1216 host = mmc_priv(mmc);
1217 host->pdev_id = pdev->id;
1218 host->plat = plat;
1219 host->mmc = mmc;
1220 host->curr.cmd = NULL;
1221
1222 host->cmdpoll = 1;
1223
1224 host->base = ioremap(memres->start, PAGE_SIZE);
1225 if (!host->base) {
1226 ret = -ENOMEM;
1227 goto host_free;
1228 }
1229
1230 host->cmd_irqres = cmd_irqres;
1231 host->memres = memres;
1232 host->dmares = dmares;
1233 spin_lock_init(&host->lock);
1234
1235 tasklet_init(&host->dma_tlet, msmsdcc_dma_complete_tlet,
1236 (unsigned long)host);
1237
1238 /*
1239 * Setup DMA
1240 */
1241 ret = msmsdcc_init_dma(host);
1242 if (ret)
1243 goto ioremap_free;
1244
1245 /* Get our clocks */
1246 host->pclk = clk_get(&pdev->dev, "sdc_pclk");
1247 if (IS_ERR(host->pclk)) {
1248 ret = PTR_ERR(host->pclk);
1249 goto dma_free;
1250 }
1251
1252 host->clk = clk_get(&pdev->dev, "sdc_clk");
1253 if (IS_ERR(host->clk)) {
1254 ret = PTR_ERR(host->clk);
1255 goto pclk_put;
1256 }
1257
1258 ret = clk_set_rate(host->clk, msmsdcc_fmin);
1259 if (ret) {
1260 pr_err("%s: Clock rate set failed (%d)\n", __func__, ret);
1261 goto clk_put;
1262 }
1263
1264 /* Enable clocks */
1265 ret = msmsdcc_enable_clocks(host);
1266 if (ret)
1267 goto clk_put;
1268
1269 host->pclk_rate = clk_get_rate(host->pclk);
1270 host->clk_rate = clk_get_rate(host->clk);
1271
1272 /*
1273 * Setup MMC host structure
1274 */
1275 mmc->ops = &msmsdcc_ops;
1276 mmc->f_min = msmsdcc_fmin;
1277 mmc->f_max = msmsdcc_fmax;
1278 mmc->ocr_avail = plat->ocr_mask;
1279
1280 if (msmsdcc_4bit)
1281 mmc->caps |= MMC_CAP_4_BIT_DATA;
1282 if (msmsdcc_sdioirq)
1283 mmc->caps |= MMC_CAP_SDIO_IRQ;
1284 mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
1285
1286 mmc->max_segs = NR_SG;
1287 mmc->max_blk_size = 4096; /* MCI_DATA_CTL BLOCKSIZE up to 4096 */
1288 mmc->max_blk_count = 65536;
1289
1290 mmc->max_req_size = 33554432; /* MCI_DATA_LENGTH is 25 bits */
1291 mmc->max_seg_size = mmc->max_req_size;
1292
1293 msmsdcc_writel(host, 0, MMCIMASK0);
1294 msmsdcc_writel(host, 0x5e007ff, MMCICLEAR);
1295
1296 msmsdcc_writel(host, MCI_IRQENABLE, MMCIMASK0);
1297 host->saved_irq0mask = MCI_IRQENABLE;
1298
1299 /*
1300 * Setup card detect change
1301 */
1302
1303 memset(&host->timer, 0, sizeof(host->timer));
1304
1305 if (stat_irqres && !(stat_irqres->flags & IORESOURCE_DISABLED)) {
1306 unsigned long irqflags = IRQF_SHARED |
1307 (stat_irqres->flags & IRQF_TRIGGER_MASK);
1308
1309 host->stat_irq = stat_irqres->start;
1310 ret = request_irq(host->stat_irq,
1311 msmsdcc_platform_status_irq,
1312 irqflags,
1313 DRIVER_NAME " (slot)",
1314 host);
1315 if (ret) {
1316 pr_err("%s: Unable to get slot IRQ %d (%d)\n",
1317 mmc_hostname(mmc), host->stat_irq, ret);
1318 goto clk_disable;
1319 }
1320 } else if (plat->register_status_notify) {
1321 plat->register_status_notify(msmsdcc_status_notify_cb, host);
1322 } else if (!plat->status)
1323 pr_err("%s: No card detect facilities available\n",
1324 mmc_hostname(mmc));
1325 else {
1326 init_timer(&host->timer);
1327 host->timer.data = (unsigned long)host;
1328 host->timer.function = msmsdcc_check_status;
1329 host->timer.expires = jiffies + HZ;
1330 add_timer(&host->timer);
1331 }
1332
1333 if (plat->status) {
1334 host->oldstat = host->plat->status(mmc_dev(host->mmc));
1335 host->eject = !host->oldstat;
1336 }
1337
1338 init_timer(&host->busclk_timer);
1339 host->busclk_timer.data = (unsigned long) host;
1340 host->busclk_timer.function = msmsdcc_busclk_expired;
1341
1342 ret = request_irq(cmd_irqres->start, msmsdcc_irq, IRQF_SHARED,
1343 DRIVER_NAME " (cmd)", host);
1344 if (ret)
1345 goto stat_irq_free;
1346
1347 ret = request_irq(cmd_irqres->start, msmsdcc_pio_irq, IRQF_SHARED,
1348 DRIVER_NAME " (pio)", host);
1349 if (ret)
1350 goto cmd_irq_free;
1351
1352 mmc_set_drvdata(pdev, mmc);
1353 mmc_add_host(mmc);
1354
1355 pr_info("%s: Qualcomm MSM SDCC at 0x%016llx irq %d,%d dma %d\n",
1356 mmc_hostname(mmc), (unsigned long long)memres->start,
1357 (unsigned int) cmd_irqres->start,
1358 (unsigned int) host->stat_irq, host->dma.channel);
1359 pr_info("%s: 4 bit data mode %s\n", mmc_hostname(mmc),
1360 (mmc->caps & MMC_CAP_4_BIT_DATA ? "enabled" : "disabled"));
1361 pr_info("%s: MMC clock %u -> %u Hz, PCLK %u Hz\n",
1362 mmc_hostname(mmc), msmsdcc_fmin, msmsdcc_fmax, host->pclk_rate);
1363 pr_info("%s: Slot eject status = %d\n", mmc_hostname(mmc), host->eject);
1364 pr_info("%s: Power save feature enable = %d\n",
1365 mmc_hostname(mmc), msmsdcc_pwrsave);
1366
1367 if (host->dma.channel != -1) {
1368 pr_info("%s: DM non-cached buffer at %p, dma_addr 0x%.8x\n",
1369 mmc_hostname(mmc), host->dma.nc, host->dma.nc_busaddr);
1370 pr_info("%s: DM cmd busaddr 0x%.8x, cmdptr busaddr 0x%.8x\n",
1371 mmc_hostname(mmc), host->dma.cmd_busaddr,
1372 host->dma.cmdptr_busaddr);
1373 } else
1374 pr_info("%s: PIO transfer enabled\n", mmc_hostname(mmc));
1375 if (host->timer.function)
1376 pr_info("%s: Polling status mode enabled\n", mmc_hostname(mmc));
1377
1378 return 0;
1379 cmd_irq_free:
1380 free_irq(cmd_irqres->start, host);
1381 stat_irq_free:
1382 if (host->stat_irq)
1383 free_irq(host->stat_irq, host);
1384 clk_disable:
1385 msmsdcc_disable_clocks(host, 0);
1386 clk_put:
1387 clk_put(host->clk);
1388 pclk_put:
1389 clk_put(host->pclk);
1390 dma_free:
1391 dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata),
1392 host->dma.nc, host->dma.nc_busaddr);
1393 ioremap_free:
1394 tasklet_kill(&host->dma_tlet);
1395 iounmap(host->base);
1396 host_free:
1397 mmc_free_host(mmc);
1398 out:
1399 return ret;
1400 }
1401
1402 #ifdef CONFIG_PM
1403 #ifdef CONFIG_MMC_MSM7X00A_RESUME_IN_WQ
1404 static void
1405 do_resume_work(struct work_struct *work)
1406 {
1407 struct msmsdcc_host *host =
1408 container_of(work, struct msmsdcc_host, resume_task);
1409 struct mmc_host *mmc = host->mmc;
1410
1411 if (mmc) {
1412 mmc_resume_host(mmc);
1413 if (host->stat_irq)
1414 enable_irq(host->stat_irq);
1415 }
1416 }
1417 #endif
1418
1419
1420 static int
1421 msmsdcc_suspend(struct platform_device *dev, pm_message_t state)
1422 {
1423 struct mmc_host *mmc = mmc_get_drvdata(dev);
1424 int rc = 0;
1425
1426 if (mmc) {
1427 struct msmsdcc_host *host = mmc_priv(mmc);
1428
1429 if (host->stat_irq)
1430 disable_irq(host->stat_irq);
1431
1432 if (mmc->card && mmc->card->type != MMC_TYPE_SDIO)
1433 rc = mmc_suspend_host(mmc);
1434 if (!rc)
1435 msmsdcc_writel(host, 0, MMCIMASK0);
1436 if (host->clks_on)
1437 msmsdcc_disable_clocks(host, 0);
1438 }
1439 return rc;
1440 }
1441
1442 static int
1443 msmsdcc_resume(struct platform_device *dev)
1444 {
1445 struct mmc_host *mmc = mmc_get_drvdata(dev);
1446
1447 if (mmc) {
1448 struct msmsdcc_host *host = mmc_priv(mmc);
1449
1450 msmsdcc_enable_clocks(host);
1451
1452 msmsdcc_writel(host, host->saved_irq0mask, MMCIMASK0);
1453
1454 if (mmc->card && mmc->card->type != MMC_TYPE_SDIO)
1455 mmc_resume_host(mmc);
1456 if (host->stat_irq)
1457 enable_irq(host->stat_irq);
1458 #if BUSCLK_PWRSAVE
1459 msmsdcc_disable_clocks(host, 1);
1460 #endif
1461 }
1462 return 0;
1463 }
1464 #else
1465 #define msmsdcc_suspend 0
1466 #define msmsdcc_resume 0
1467 #endif
1468
1469 static struct platform_driver msmsdcc_driver = {
1470 .probe = msmsdcc_probe,
1471 .suspend = msmsdcc_suspend,
1472 .resume = msmsdcc_resume,
1473 .driver = {
1474 .name = "msm_sdcc",
1475 },
1476 };
1477
1478 static int __init msmsdcc_init(void)
1479 {
1480 return platform_driver_register(&msmsdcc_driver);
1481 }
1482
1483 static void __exit msmsdcc_exit(void)
1484 {
1485 platform_driver_unregister(&msmsdcc_driver);
1486 }
1487
1488 module_init(msmsdcc_init);
1489 module_exit(msmsdcc_exit);
1490
1491 MODULE_DESCRIPTION("Qualcomm MSM 7X00A Multimedia Card Interface driver");
1492 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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