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19#include <linux/clk.h>
20#include <linux/completion.h>
21#include <linux/delay.h>
22#include <linux/dma-mapping.h>
23#include <linux/dmaengine.h>
24#include <linux/mmc/card.h>
25#include <linux/mmc/core.h>
26#include <linux/mmc/host.h>
27#include <linux/mmc/mmc.h>
28#include <linux/mmc/sdio.h>
29#include <linux/mmc/sh_mmcif.h>
30#include <linux/pagemap.h>
31#include <linux/platform_device.h>
32
33#define DRIVER_NAME "sh_mmcif"
34#define DRIVER_VERSION "2010-04-28"
35
36
37#define CMD_MASK 0x3f000000
38#define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22))
39#define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22))
40#define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22))
41#define CMD_SET_RBSY (1 << 21)
42#define CMD_SET_CCSEN (1 << 20)
43#define CMD_SET_WDAT (1 << 19)
44#define CMD_SET_DWEN (1 << 18)
45#define CMD_SET_CMLTE (1 << 17)
46#define CMD_SET_CMD12EN (1 << 16)
47#define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14))
48#define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14))
49#define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14))
50#define CMD_SET_CRC7C ((0 << 13) | (0 << 12))
51#define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12))
52#define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12))
53#define CMD_SET_CRC16C (1 << 10)
54#define CMD_SET_CRCSTE (1 << 8)
55#define CMD_SET_TBIT (1 << 7)
56#define CMD_SET_OPDM (1 << 6)
57#define CMD_SET_CCSH (1 << 5)
58#define CMD_SET_DATW_1 ((0 << 1) | (0 << 0))
59#define CMD_SET_DATW_4 ((0 << 1) | (1 << 0))
60#define CMD_SET_DATW_8 ((1 << 1) | (0 << 0))
61
62
63#define CMD_CTRL_BREAK (1 << 0)
64
65
66#define BLOCK_SIZE_MASK 0x0000ffff
67
68
69#define INT_CCSDE (1 << 29)
70#define INT_CMD12DRE (1 << 26)
71#define INT_CMD12RBE (1 << 25)
72#define INT_CMD12CRE (1 << 24)
73#define INT_DTRANE (1 << 23)
74#define INT_BUFRE (1 << 22)
75#define INT_BUFWEN (1 << 21)
76#define INT_BUFREN (1 << 20)
77#define INT_CCSRCV (1 << 19)
78#define INT_RBSYE (1 << 17)
79#define INT_CRSPE (1 << 16)
80#define INT_CMDVIO (1 << 15)
81#define INT_BUFVIO (1 << 14)
82#define INT_WDATERR (1 << 11)
83#define INT_RDATERR (1 << 10)
84#define INT_RIDXERR (1 << 9)
85#define INT_RSPERR (1 << 8)
86#define INT_CCSTO (1 << 5)
87#define INT_CRCSTO (1 << 4)
88#define INT_WDATTO (1 << 3)
89#define INT_RDATTO (1 << 2)
90#define INT_RBSYTO (1 << 1)
91#define INT_RSPTO (1 << 0)
92#define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \
93 INT_RDATERR | INT_RIDXERR | INT_RSPERR | \
94 INT_CCSTO | INT_CRCSTO | INT_WDATTO | \
95 INT_RDATTO | INT_RBSYTO | INT_RSPTO)
96
97
98#define MASK_ALL 0x00000000
99#define MASK_MCCSDE (1 << 29)
100#define MASK_MCMD12DRE (1 << 26)
101#define MASK_MCMD12RBE (1 << 25)
102#define MASK_MCMD12CRE (1 << 24)
103#define MASK_MDTRANE (1 << 23)
104#define MASK_MBUFRE (1 << 22)
105#define MASK_MBUFWEN (1 << 21)
106#define MASK_MBUFREN (1 << 20)
107#define MASK_MCCSRCV (1 << 19)
108#define MASK_MRBSYE (1 << 17)
109#define MASK_MCRSPE (1 << 16)
110#define MASK_MCMDVIO (1 << 15)
111#define MASK_MBUFVIO (1 << 14)
112#define MASK_MWDATERR (1 << 11)
113#define MASK_MRDATERR (1 << 10)
114#define MASK_MRIDXERR (1 << 9)
115#define MASK_MRSPERR (1 << 8)
116#define MASK_MCCSTO (1 << 5)
117#define MASK_MCRCSTO (1 << 4)
118#define MASK_MWDATTO (1 << 3)
119#define MASK_MRDATTO (1 << 2)
120#define MASK_MRBSYTO (1 << 1)
121#define MASK_MRSPTO (1 << 0)
122
123
124#define STS1_CMDSEQ (1 << 31)
125
126
127#define STS2_CRCSTE (1 << 31)
128#define STS2_CRC16E (1 << 30)
129#define STS2_AC12CRCE (1 << 29)
130#define STS2_RSPCRC7E (1 << 28)
131#define STS2_CRCSTEBE (1 << 27)
132#define STS2_RDATEBE (1 << 26)
133#define STS2_AC12REBE (1 << 25)
134#define STS2_RSPEBE (1 << 24)
135#define STS2_AC12IDXE (1 << 23)
136#define STS2_RSPIDXE (1 << 22)
137#define STS2_CCSTO (1 << 15)
138#define STS2_RDATTO (1 << 14)
139#define STS2_DATBSYTO (1 << 13)
140#define STS2_CRCSTTO (1 << 12)
141#define STS2_AC12BSYTO (1 << 11)
142#define STS2_RSPBSYTO (1 << 10)
143#define STS2_AC12RSPTO (1 << 9)
144#define STS2_RSPTO (1 << 8)
145#define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \
146 STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE)
147#define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \
148 STS2_DATBSYTO | STS2_CRCSTTO | \
149 STS2_AC12BSYTO | STS2_RSPBSYTO | \
150 STS2_AC12RSPTO | STS2_RSPTO)
151
152#define CLKDEV_EMMC_DATA 52000000
153#define CLKDEV_MMC_DATA 20000000
154#define CLKDEV_INIT 400000
155
156struct sh_mmcif_host {
157 struct mmc_host *mmc;
158 struct mmc_data *data;
159 struct platform_device *pd;
160 struct clk *hclk;
161 unsigned int clk;
162 int bus_width;
163 bool sd_error;
164 long timeout;
165 void __iomem *addr;
166 struct completion intr_wait;
167
168
169 struct dma_chan *chan_rx;
170 struct dma_chan *chan_tx;
171 struct completion dma_complete;
172 unsigned int dma_sglen;
173};
174
175static inline void sh_mmcif_bitset(struct sh_mmcif_host *host,
176 unsigned int reg, u32 val)
177{
178 writel(val | readl(host->addr + reg), host->addr + reg);
179}
180
181static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
182 unsigned int reg, u32 val)
183{
184 writel(~val & readl(host->addr + reg), host->addr + reg);
185}
186
187static void mmcif_dma_complete(void *arg)
188{
189 struct sh_mmcif_host *host = arg;
190 dev_dbg(&host->pd->dev, "Command completed\n");
191
192 if (WARN(!host->data, "%s: NULL data in DMA completion!\n",
193 dev_name(&host->pd->dev)))
194 return;
195
196 if (host->data->flags & MMC_DATA_READ)
197 dma_unmap_sg(&host->pd->dev, host->data->sg, host->dma_sglen,
198 DMA_FROM_DEVICE);
199 else
200 dma_unmap_sg(&host->pd->dev, host->data->sg, host->dma_sglen,
201 DMA_TO_DEVICE);
202
203 complete(&host->dma_complete);
204}
205
206static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host)
207{
208 struct scatterlist *sg = host->data->sg;
209 struct dma_async_tx_descriptor *desc = NULL;
210 struct dma_chan *chan = host->chan_rx;
211 dma_cookie_t cookie = -EINVAL;
212 int ret;
213
214 ret = dma_map_sg(&host->pd->dev, sg, host->data->sg_len, DMA_FROM_DEVICE);
215 if (ret > 0) {
216 host->dma_sglen = ret;
217 desc = chan->device->device_prep_slave_sg(chan, sg, ret,
218 DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
219 }
220
221 if (desc) {
222 desc->callback = mmcif_dma_complete;
223 desc->callback_param = host;
224 cookie = desc->tx_submit(desc);
225 if (cookie < 0) {
226 desc = NULL;
227 ret = cookie;
228 } else {
229 sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN);
230 chan->device->device_issue_pending(chan);
231 }
232 }
233 dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n",
234 __func__, host->data->sg_len, ret, cookie);
235
236 if (!desc) {
237
238 if (ret >= 0)
239 ret = -EIO;
240 host->chan_rx = NULL;
241 host->dma_sglen = 0;
242 dma_release_channel(chan);
243
244 chan = host->chan_tx;
245 if (chan) {
246 host->chan_tx = NULL;
247 dma_release_channel(chan);
248 }
249 dev_warn(&host->pd->dev,
250 "DMA failed: %d, falling back to PIO\n", ret);
251 sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
252 }
253
254 dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
255 desc, cookie, host->data->sg_len);
256}
257
258static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host)
259{
260 struct scatterlist *sg = host->data->sg;
261 struct dma_async_tx_descriptor *desc = NULL;
262 struct dma_chan *chan = host->chan_tx;
263 dma_cookie_t cookie = -EINVAL;
264 int ret;
265
266 ret = dma_map_sg(&host->pd->dev, sg, host->data->sg_len, DMA_TO_DEVICE);
267 if (ret > 0) {
268 host->dma_sglen = ret;
269 desc = chan->device->device_prep_slave_sg(chan, sg, ret,
270 DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
271 }
272
273 if (desc) {
274 desc->callback = mmcif_dma_complete;
275 desc->callback_param = host;
276 cookie = desc->tx_submit(desc);
277 if (cookie < 0) {
278 desc = NULL;
279 ret = cookie;
280 } else {
281 sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAWEN);
282 chan->device->device_issue_pending(chan);
283 }
284 }
285 dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n",
286 __func__, host->data->sg_len, ret, cookie);
287
288 if (!desc) {
289
290 if (ret >= 0)
291 ret = -EIO;
292 host->chan_tx = NULL;
293 host->dma_sglen = 0;
294 dma_release_channel(chan);
295
296 chan = host->chan_rx;
297 if (chan) {
298 host->chan_rx = NULL;
299 dma_release_channel(chan);
300 }
301 dev_warn(&host->pd->dev,
302 "DMA failed: %d, falling back to PIO\n", ret);
303 sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
304 }
305
306 dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d\n", __func__,
307 desc, cookie);
308}
309
310static bool sh_mmcif_filter(struct dma_chan *chan, void *arg)
311{
312 dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg);
313 chan->private = arg;
314 return true;
315}
316
317static void sh_mmcif_request_dma(struct sh_mmcif_host *host,
318 struct sh_mmcif_plat_data *pdata)
319{
320 host->dma_sglen = 0;
321
322
323 if (pdata->dma) {
324 dma_cap_mask_t mask;
325
326 dma_cap_zero(mask);
327 dma_cap_set(DMA_SLAVE, mask);
328
329 host->chan_tx = dma_request_channel(mask, sh_mmcif_filter,
330 &pdata->dma->chan_priv_tx);
331 dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
332 host->chan_tx);
333
334 if (!host->chan_tx)
335 return;
336
337 host->chan_rx = dma_request_channel(mask, sh_mmcif_filter,
338 &pdata->dma->chan_priv_rx);
339 dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
340 host->chan_rx);
341
342 if (!host->chan_rx) {
343 dma_release_channel(host->chan_tx);
344 host->chan_tx = NULL;
345 return;
346 }
347
348 init_completion(&host->dma_complete);
349 }
350}
351
352static void sh_mmcif_release_dma(struct sh_mmcif_host *host)
353{
354 sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
355
356 if (host->chan_tx) {
357 struct dma_chan *chan = host->chan_tx;
358 host->chan_tx = NULL;
359 dma_release_channel(chan);
360 }
361 if (host->chan_rx) {
362 struct dma_chan *chan = host->chan_rx;
363 host->chan_rx = NULL;
364 dma_release_channel(chan);
365 }
366
367 host->dma_sglen = 0;
368}
369
370static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
371{
372 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
373
374 sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
375 sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR);
376
377 if (!clk)
378 return;
379 if (p->sup_pclk && clk == host->clk)
380 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
381 else
382 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
383 (ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16));
384
385 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
386}
387
388static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
389{
390 u32 tmp;
391
392 tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL);
393
394 sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON);
395 sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF);
396 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp |
397 SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
398
399 sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
400}
401
402static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
403{
404 u32 state1, state2;
405 int ret, timeout = 10000000;
406
407 host->sd_error = false;
408
409 state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1);
410 state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2);
411 dev_dbg(&host->pd->dev, "ERR HOST_STS1 = %08x\n", state1);
412 dev_dbg(&host->pd->dev, "ERR HOST_STS2 = %08x\n", state2);
413
414 if (state1 & STS1_CMDSEQ) {
415 sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
416 sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK);
417 while (1) {
418 timeout--;
419 if (timeout < 0) {
420 dev_err(&host->pd->dev,
421 "Forceed end of command sequence timeout err\n");
422 return -EIO;
423 }
424 if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1)
425 & STS1_CMDSEQ))
426 break;
427 mdelay(1);
428 }
429 sh_mmcif_sync_reset(host);
430 dev_dbg(&host->pd->dev, "Forced end of command sequence\n");
431 return -EIO;
432 }
433
434 if (state2 & STS2_CRC_ERR) {
435 dev_dbg(&host->pd->dev, ": Happened CRC error\n");
436 ret = -EIO;
437 } else if (state2 & STS2_TIMEOUT_ERR) {
438 dev_dbg(&host->pd->dev, ": Happened Timeout error\n");
439 ret = -ETIMEDOUT;
440 } else {
441 dev_dbg(&host->pd->dev, ": Happened End/Index error\n");
442 ret = -EIO;
443 }
444 return ret;
445}
446
447static int sh_mmcif_single_read(struct sh_mmcif_host *host,
448 struct mmc_request *mrq)
449{
450 struct mmc_data *data = mrq->data;
451 long time;
452 u32 blocksize, i, *p = sg_virt(data->sg);
453
454
455 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
456 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
457 host->timeout);
458 if (time <= 0 || host->sd_error)
459 return sh_mmcif_error_manage(host);
460
461 blocksize = (BLOCK_SIZE_MASK &
462 sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
463 for (i = 0; i < blocksize / 4; i++)
464 *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
465
466
467 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
468 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
469 host->timeout);
470 if (time <= 0 || host->sd_error)
471 return sh_mmcif_error_manage(host);
472
473 return 0;
474}
475
476static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
477 struct mmc_request *mrq)
478{
479 struct mmc_data *data = mrq->data;
480 long time;
481 u32 blocksize, i, j, sec, *p;
482
483 blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
484 MMCIF_CE_BLOCK_SET);
485 for (j = 0; j < data->sg_len; j++) {
486 p = sg_virt(data->sg);
487 for (sec = 0; sec < data->sg->length / blocksize; sec++) {
488 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
489
490 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
491 host->timeout);
492
493 if (time <= 0 || host->sd_error)
494 return sh_mmcif_error_manage(host);
495
496 for (i = 0; i < blocksize / 4; i++)
497 *p++ = sh_mmcif_readl(host->addr,
498 MMCIF_CE_DATA);
499 }
500 if (j < data->sg_len - 1)
501 data->sg++;
502 }
503 return 0;
504}
505
506static int sh_mmcif_single_write(struct sh_mmcif_host *host,
507 struct mmc_request *mrq)
508{
509 struct mmc_data *data = mrq->data;
510 long time;
511 u32 blocksize, i, *p = sg_virt(data->sg);
512
513 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
514
515
516 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
517 host->timeout);
518 if (time <= 0 || host->sd_error)
519 return sh_mmcif_error_manage(host);
520
521 blocksize = (BLOCK_SIZE_MASK &
522 sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
523 for (i = 0; i < blocksize / 4; i++)
524 sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
525
526
527 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
528
529 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
530 host->timeout);
531 if (time <= 0 || host->sd_error)
532 return sh_mmcif_error_manage(host);
533
534 return 0;
535}
536
537static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
538 struct mmc_request *mrq)
539{
540 struct mmc_data *data = mrq->data;
541 long time;
542 u32 i, sec, j, blocksize, *p;
543
544 blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
545 MMCIF_CE_BLOCK_SET);
546
547 for (j = 0; j < data->sg_len; j++) {
548 p = sg_virt(data->sg);
549 for (sec = 0; sec < data->sg->length / blocksize; sec++) {
550 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
551
552 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
553 host->timeout);
554
555 if (time <= 0 || host->sd_error)
556 return sh_mmcif_error_manage(host);
557
558 for (i = 0; i < blocksize / 4; i++)
559 sh_mmcif_writel(host->addr,
560 MMCIF_CE_DATA, *p++);
561 }
562 if (j < data->sg_len - 1)
563 data->sg++;
564 }
565 return 0;
566}
567
568static void sh_mmcif_get_response(struct sh_mmcif_host *host,
569 struct mmc_command *cmd)
570{
571 if (cmd->flags & MMC_RSP_136) {
572 cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3);
573 cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2);
574 cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1);
575 cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
576 } else
577 cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
578}
579
580static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
581 struct mmc_command *cmd)
582{
583 cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12);
584}
585
586static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
587 struct mmc_request *mrq, struct mmc_command *cmd, u32 opc)
588{
589 u32 tmp = 0;
590
591
592 switch (mmc_resp_type(cmd)) {
593 case MMC_RSP_NONE:
594 tmp |= CMD_SET_RTYP_NO;
595 break;
596 case MMC_RSP_R1:
597 case MMC_RSP_R1B:
598 case MMC_RSP_R3:
599 tmp |= CMD_SET_RTYP_6B;
600 break;
601 case MMC_RSP_R2:
602 tmp |= CMD_SET_RTYP_17B;
603 break;
604 default:
605 dev_err(&host->pd->dev, "Unsupported response type.\n");
606 break;
607 }
608 switch (opc) {
609
610 case MMC_SWITCH:
611 case MMC_STOP_TRANSMISSION:
612 case MMC_SET_WRITE_PROT:
613 case MMC_CLR_WRITE_PROT:
614 case MMC_ERASE:
615 case MMC_GEN_CMD:
616 tmp |= CMD_SET_RBSY;
617 break;
618 }
619
620 if (host->data) {
621 tmp |= CMD_SET_WDAT;
622 switch (host->bus_width) {
623 case MMC_BUS_WIDTH_1:
624 tmp |= CMD_SET_DATW_1;
625 break;
626 case MMC_BUS_WIDTH_4:
627 tmp |= CMD_SET_DATW_4;
628 break;
629 case MMC_BUS_WIDTH_8:
630 tmp |= CMD_SET_DATW_8;
631 break;
632 default:
633 dev_err(&host->pd->dev, "Unsupported bus width.\n");
634 break;
635 }
636 }
637
638 if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK)
639 tmp |= CMD_SET_DWEN;
640
641 if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) {
642 tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
643 sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET,
644 mrq->data->blocks << 16);
645 }
646
647 if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID ||
648 opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
649 tmp |= CMD_SET_RIDXC_BITS;
650
651 if (opc == MMC_SEND_OP_COND)
652 tmp |= CMD_SET_CRC7C_BITS;
653
654 if (opc == MMC_ALL_SEND_CID ||
655 opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
656 tmp |= CMD_SET_CRC7C_INTERNAL;
657
658 return opc = ((opc << 24) | tmp);
659}
660
661static int sh_mmcif_data_trans(struct sh_mmcif_host *host,
662 struct mmc_request *mrq, u32 opc)
663{
664 int ret;
665
666 switch (opc) {
667 case MMC_READ_MULTIPLE_BLOCK:
668 ret = sh_mmcif_multi_read(host, mrq);
669 break;
670 case MMC_WRITE_MULTIPLE_BLOCK:
671 ret = sh_mmcif_multi_write(host, mrq);
672 break;
673 case MMC_WRITE_BLOCK:
674 ret = sh_mmcif_single_write(host, mrq);
675 break;
676 case MMC_READ_SINGLE_BLOCK:
677 case MMC_SEND_EXT_CSD:
678 ret = sh_mmcif_single_read(host, mrq);
679 break;
680 default:
681 dev_err(&host->pd->dev, "UNSUPPORTED CMD = d'%08d\n", opc);
682 ret = -EINVAL;
683 break;
684 }
685 return ret;
686}
687
688static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
689 struct mmc_request *mrq, struct mmc_command *cmd)
690{
691 long time;
692 int ret = 0, mask = 0;
693 u32 opc = cmd->opcode;
694
695 switch (opc) {
696
697 case MMC_SWITCH:
698 case MMC_STOP_TRANSMISSION:
699 case MMC_SET_WRITE_PROT:
700 case MMC_CLR_WRITE_PROT:
701 case MMC_ERASE:
702 case MMC_GEN_CMD:
703 mask = MASK_MRBSYE;
704 break;
705 default:
706 mask = MASK_MCRSPE;
707 break;
708 }
709 mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
710 MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
711 MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
712 MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
713
714 if (host->data) {
715 sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0);
716 sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET,
717 mrq->data->blksz);
718 }
719 opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);
720
721 sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0);
722 sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask);
723
724 sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg);
725
726 sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc);
727
728 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
729 host->timeout);
730 if (time <= 0) {
731 cmd->error = sh_mmcif_error_manage(host);
732 return;
733 }
734 if (host->sd_error) {
735 switch (cmd->opcode) {
736 case MMC_ALL_SEND_CID:
737 case MMC_SELECT_CARD:
738 case MMC_APP_CMD:
739 cmd->error = -ETIMEDOUT;
740 break;
741 default:
742 dev_dbg(&host->pd->dev, "Cmd(d'%d) err\n",
743 cmd->opcode);
744 cmd->error = sh_mmcif_error_manage(host);
745 break;
746 }
747 host->sd_error = false;
748 return;
749 }
750 if (!(cmd->flags & MMC_RSP_PRESENT)) {
751 cmd->error = 0;
752 return;
753 }
754 sh_mmcif_get_response(host, cmd);
755 if (host->data) {
756 if (!host->dma_sglen) {
757 ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
758 } else {
759 long time =
760 wait_for_completion_interruptible_timeout(&host->dma_complete,
761 host->timeout);
762 if (!time)
763 ret = -ETIMEDOUT;
764 else if (time < 0)
765 ret = time;
766 sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC,
767 BUF_ACC_DMAREN | BUF_ACC_DMAWEN);
768 host->dma_sglen = 0;
769 }
770 if (ret < 0)
771 mrq->data->bytes_xfered = 0;
772 else
773 mrq->data->bytes_xfered =
774 mrq->data->blocks * mrq->data->blksz;
775 }
776 cmd->error = ret;
777}
778
779static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
780 struct mmc_request *mrq, struct mmc_command *cmd)
781{
782 long time;
783
784 if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
785 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
786 else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
787 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
788 else {
789 dev_err(&host->pd->dev, "unsupported stop cmd\n");
790 cmd->error = sh_mmcif_error_manage(host);
791 return;
792 }
793
794 time = wait_for_completion_interruptible_timeout(&host->intr_wait,
795 host->timeout);
796 if (time <= 0 || host->sd_error) {
797 cmd->error = sh_mmcif_error_manage(host);
798 return;
799 }
800 sh_mmcif_get_cmd12response(host, cmd);
801 cmd->error = 0;
802}
803
804static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
805{
806 struct sh_mmcif_host *host = mmc_priv(mmc);
807
808 switch (mrq->cmd->opcode) {
809
810 case SD_IO_SEND_OP_COND:
811 case MMC_APP_CMD:
812 mrq->cmd->error = -ETIMEDOUT;
813 mmc_request_done(mmc, mrq);
814 return;
815 case MMC_SEND_EXT_CSD:
816 if (!mrq->data) {
817
818 mrq->cmd->error = -ETIMEDOUT;
819 mmc_request_done(mmc, mrq);
820 return;
821 }
822 break;
823 default:
824 break;
825 }
826 host->data = mrq->data;
827 if (mrq->data) {
828 if (mrq->data->flags & MMC_DATA_READ) {
829 if (host->chan_rx)
830 sh_mmcif_start_dma_rx(host);
831 } else {
832 if (host->chan_tx)
833 sh_mmcif_start_dma_tx(host);
834 }
835 }
836 sh_mmcif_start_cmd(host, mrq, mrq->cmd);
837 host->data = NULL;
838
839 if (mrq->cmd->error != 0) {
840 mmc_request_done(mmc, mrq);
841 return;
842 }
843 if (mrq->stop)
844 sh_mmcif_stop_cmd(host, mrq, mrq->stop);
845 mmc_request_done(mmc, mrq);
846}
847
848static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
849{
850 struct sh_mmcif_host *host = mmc_priv(mmc);
851 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
852
853 if (ios->power_mode == MMC_POWER_OFF) {
854
855 sh_mmcif_clock_control(host, 0);
856 if (p->down_pwr)
857 p->down_pwr(host->pd);
858 return;
859 } else if (ios->power_mode == MMC_POWER_UP) {
860 if (p->set_pwr)
861 p->set_pwr(host->pd, ios->power_mode);
862 }
863
864 if (ios->clock)
865 sh_mmcif_clock_control(host, ios->clock);
866
867 host->bus_width = ios->bus_width;
868}
869
870static int sh_mmcif_get_cd(struct mmc_host *mmc)
871{
872 struct sh_mmcif_host *host = mmc_priv(mmc);
873 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
874
875 if (!p->get_cd)
876 return -ENOSYS;
877 else
878 return p->get_cd(host->pd);
879}
880
881static struct mmc_host_ops sh_mmcif_ops = {
882 .request = sh_mmcif_request,
883 .set_ios = sh_mmcif_set_ios,
884 .get_cd = sh_mmcif_get_cd,
885};
886
887static void sh_mmcif_detect(struct mmc_host *mmc)
888{
889 mmc_detect_change(mmc, 0);
890}
891
892static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
893{
894 struct sh_mmcif_host *host = dev_id;
895 u32 state;
896 int err = 0;
897
898 state = sh_mmcif_readl(host->addr, MMCIF_CE_INT);
899
900 if (state & INT_RBSYE) {
901 sh_mmcif_writel(host->addr, MMCIF_CE_INT,
902 ~(INT_RBSYE | INT_CRSPE));
903 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
904 } else if (state & INT_CRSPE) {
905 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE);
906 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE);
907 } else if (state & INT_BUFREN) {
908 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN);
909 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
910 } else if (state & INT_BUFWEN) {
911 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN);
912 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
913 } else if (state & INT_CMD12DRE) {
914 sh_mmcif_writel(host->addr, MMCIF_CE_INT,
915 ~(INT_CMD12DRE | INT_CMD12RBE |
916 INT_CMD12CRE | INT_BUFRE));
917 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
918 } else if (state & INT_BUFRE) {
919 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE);
920 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
921 } else if (state & INT_DTRANE) {
922 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE);
923 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
924 } else if (state & INT_CMD12RBE) {
925 sh_mmcif_writel(host->addr, MMCIF_CE_INT,
926 ~(INT_CMD12RBE | INT_CMD12CRE));
927 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
928 } else if (state & INT_ERR_STS) {
929
930 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
931 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
932 err = 1;
933 } else {
934 dev_dbg(&host->pd->dev, "Not support int\n");
935 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
936 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
937 err = 1;
938 }
939 if (err) {
940 host->sd_error = true;
941 dev_dbg(&host->pd->dev, "int err state = %08x\n", state);
942 }
943 if (state & ~(INT_CMD12RBE | INT_CMD12CRE))
944 complete(&host->intr_wait);
945 else
946 dev_dbg(&host->pd->dev, "Unexpected IRQ 0x%x\n", state);
947
948 return IRQ_HANDLED;
949}
950
951static int __devinit sh_mmcif_probe(struct platform_device *pdev)
952{
953 int ret = 0, irq[2];
954 struct mmc_host *mmc;
955 struct sh_mmcif_host *host;
956 struct sh_mmcif_plat_data *pd;
957 struct resource *res;
958 void __iomem *reg;
959 char clk_name[8];
960
961 irq[0] = platform_get_irq(pdev, 0);
962 irq[1] = platform_get_irq(pdev, 1);
963 if (irq[0] < 0 || irq[1] < 0) {
964 dev_err(&pdev->dev, "Get irq error\n");
965 return -ENXIO;
966 }
967 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
968 if (!res) {
969 dev_err(&pdev->dev, "platform_get_resource error.\n");
970 return -ENXIO;
971 }
972 reg = ioremap(res->start, resource_size(res));
973 if (!reg) {
974 dev_err(&pdev->dev, "ioremap error.\n");
975 return -ENOMEM;
976 }
977 pd = pdev->dev.platform_data;
978 if (!pd) {
979 dev_err(&pdev->dev, "sh_mmcif plat data error.\n");
980 ret = -ENXIO;
981 goto clean_up;
982 }
983 mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev);
984 if (!mmc) {
985 ret = -ENOMEM;
986 goto clean_up;
987 }
988 host = mmc_priv(mmc);
989 host->mmc = mmc;
990 host->addr = reg;
991 host->timeout = 1000;
992
993 snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id);
994 host->hclk = clk_get(&pdev->dev, clk_name);
995 if (IS_ERR(host->hclk)) {
996 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
997 ret = PTR_ERR(host->hclk);
998 goto clean_up1;
999 }
1000 clk_enable(host->hclk);
1001 host->clk = clk_get_rate(host->hclk);
1002 host->pd = pdev;
1003
1004 init_completion(&host->intr_wait);
1005
1006 mmc->ops = &sh_mmcif_ops;
1007 mmc->f_max = host->clk;
1008
1009 if (mmc->f_max < 51200000)
1010 mmc->f_min = mmc->f_max / 128;
1011 else if (mmc->f_max < 102400000)
1012 mmc->f_min = mmc->f_max / 256;
1013 else
1014 mmc->f_min = mmc->f_max / 512;
1015 if (pd->ocr)
1016 mmc->ocr_avail = pd->ocr;
1017 mmc->caps = MMC_CAP_MMC_HIGHSPEED;
1018 if (pd->caps)
1019 mmc->caps |= pd->caps;
1020 mmc->max_segs = 32;
1021 mmc->max_blk_size = 512;
1022 mmc->max_req_size = PAGE_CACHE_SIZE * mmc->max_segs;
1023 mmc->max_blk_count = mmc->max_req_size / mmc->max_blk_size;
1024 mmc->max_seg_size = mmc->max_req_size;
1025
1026 sh_mmcif_sync_reset(host);
1027 platform_set_drvdata(pdev, host);
1028
1029
1030 sh_mmcif_request_dma(host, pd);
1031
1032 mmc_add_host(mmc);
1033
1034 ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
1035 if (ret) {
1036 dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n");
1037 goto clean_up2;
1038 }
1039 ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
1040 if (ret) {
1041 free_irq(irq[0], host);
1042 dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
1043 goto clean_up2;
1044 }
1045
1046 sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
1047 sh_mmcif_detect(host->mmc);
1048
1049 dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
1050 dev_dbg(&pdev->dev, "chip ver H'%04x\n",
1051 sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
1052 return ret;
1053
1054clean_up2:
1055 clk_disable(host->hclk);
1056clean_up1:
1057 mmc_free_host(mmc);
1058clean_up:
1059 if (reg)
1060 iounmap(reg);
1061 return ret;
1062}
1063
1064static int __devexit sh_mmcif_remove(struct platform_device *pdev)
1065{
1066 struct sh_mmcif_host *host = platform_get_drvdata(pdev);
1067 int irq[2];
1068
1069 mmc_remove_host(host->mmc);
1070 sh_mmcif_release_dma(host);
1071
1072 if (host->addr)
1073 iounmap(host->addr);
1074
1075 sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
1076
1077 irq[0] = platform_get_irq(pdev, 0);
1078 irq[1] = platform_get_irq(pdev, 1);
1079
1080 free_irq(irq[0], host);
1081 free_irq(irq[1], host);
1082
1083 platform_set_drvdata(pdev, NULL);
1084
1085 clk_disable(host->hclk);
1086 mmc_free_host(host->mmc);
1087
1088 return 0;
1089}
1090
1091static struct platform_driver sh_mmcif_driver = {
1092 .probe = sh_mmcif_probe,
1093 .remove = sh_mmcif_remove,
1094 .driver = {
1095 .name = DRIVER_NAME,
1096 },
1097};
1098
1099static int __init sh_mmcif_init(void)
1100{
1101 return platform_driver_register(&sh_mmcif_driver);
1102}
1103
1104static void __exit sh_mmcif_exit(void)
1105{
1106 platform_driver_unregister(&sh_mmcif_driver);
1107}
1108
1109module_init(sh_mmcif_init);
1110module_exit(sh_mmcif_exit);
1111
1112
1113MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
1114MODULE_LICENSE("GPL");
1115MODULE_ALIAS("platform:" DRIVER_NAME);
1116MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>");
1117
