projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: add support MMCIF for SuperH
[linux-2.6-block.git] / drivers / mmc / host / sh_mmcif.c
CommitLineData
fdc50a94
YG		 1/*
2 * MMCIF eMMC driver.
3 *
4 * Copyright (C) 2010 Renesas Solutions Corp.
5 * Yusuke Goda <yusuke.goda.sx@renesas.com>
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 as published by
9 * the Free Software Foundation; either version 2 of the License.
10 *
11 *
12 * TODO
13 * 1. DMA
14 * 2. Power management
15 * 3. Handle MMC errors better
16 *
17 */
18
19#include <linux/dma-mapping.h>
20#include <linux/mmc/host.h>
21#include <linux/mmc/card.h>
22#include <linux/mmc/core.h>
23#include <linux/mmc/mmc.h>
24#include <linux/mmc/sdio.h>
25#include <linux/delay.h>
26#include <linux/platform_device.h>
27#include <linux/clk.h>
28#include <linux/mmc/sh_mmcif.h>
29
30#define DRIVER_NAME "sh_mmcif"
31#define DRIVER_VERSION "2010-04-28"
32
33#define MMCIF_CE_CMD_SET 0x00000000
34#define MMCIF_CE_ARG 0x00000008
35#define MMCIF_CE_ARG_CMD12 0x0000000C
36#define MMCIF_CE_CMD_CTRL 0x00000010
37#define MMCIF_CE_BLOCK_SET 0x00000014
38#define MMCIF_CE_CLK_CTRL 0x00000018
39#define MMCIF_CE_BUF_ACC 0x0000001C
40#define MMCIF_CE_RESP3 0x00000020
41#define MMCIF_CE_RESP2 0x00000024
42#define MMCIF_CE_RESP1 0x00000028
43#define MMCIF_CE_RESP0 0x0000002C
44#define MMCIF_CE_RESP_CMD12 0x00000030
45#define MMCIF_CE_DATA 0x00000034
46#define MMCIF_CE_INT 0x00000040
47#define MMCIF_CE_INT_MASK 0x00000044
48#define MMCIF_CE_HOST_STS1 0x00000048
49#define MMCIF_CE_HOST_STS2 0x0000004C
50#define MMCIF_CE_VERSION 0x0000007C
51
52/* CE_CMD_SET */
53#define CMD_MASK 0x3f000000
54#define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22))
55#define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */
56#define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */
57#define CMD_SET_RBSY (1 << 21) /* R1b */
58#define CMD_SET_CCSEN (1 << 20)
59#define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */
60#define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */
61#define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */
62#define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */
63#define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */
64#define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */
65#define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */
66#define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/
67#define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/
68#define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/
69#define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/
70#define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */
71#define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */
72#define CMD_SET_OPDM (1 << 6) /* 1: open/drain */
73#define CMD_SET_CCSH (1 << 5)
74#define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */
75#define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */
76#define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */
77
78/* CE_CMD_CTRL */
79#define CMD_CTRL_BREAK (1 << 0)
80
81/* CE_BLOCK_SET */
82#define BLOCK_SIZE_MASK 0x0000ffff
83
84/* CE_CLK_CTRL */
85#define CLK_ENABLE (1 << 24) /* 1: output mmc clock */
86#define CLK_CLEAR ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
87#define CLK_SUP_PCLK ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
88#define SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */
89#define SRBSYTO_29 ((1 << 11) | (1 << 10) | \
90 (1 << 9) | (1 << 8)) /* resp busy timeout */
91#define SRWDTO_29 ((1 << 7) | (1 << 6) | \
92 (1 << 5) | (1 << 4)) /* read/write timeout */
93#define SCCSTO_29 ((1 << 3) | (1 << 2) | \
94 (1 << 1) | (1 << 0)) /* ccs timeout */
95
96/* CE_BUF_ACC */
97#define BUF_ACC_DMAWEN (1 << 25)
98#define BUF_ACC_DMAREN (1 << 24)
99#define BUF_ACC_BUSW_32 (0 << 17)
100#define BUF_ACC_BUSW_16 (1 << 17)
101#define BUF_ACC_ATYP (1 << 16)
102
103/* CE_INT */
104#define INT_CCSDE (1 << 29)
105#define INT_CMD12DRE (1 << 26)
106#define INT_CMD12RBE (1 << 25)
107#define INT_CMD12CRE (1 << 24)
108#define INT_DTRANE (1 << 23)
109#define INT_BUFRE (1 << 22)
110#define INT_BUFWEN (1 << 21)
111#define INT_BUFREN (1 << 20)
112#define INT_CCSRCV (1 << 19)
113#define INT_RBSYE (1 << 17)
114#define INT_CRSPE (1 << 16)
115#define INT_CMDVIO (1 << 15)
116#define INT_BUFVIO (1 << 14)
117#define INT_WDATERR (1 << 11)
118#define INT_RDATERR (1 << 10)
119#define INT_RIDXERR (1 << 9)
120#define INT_RSPERR (1 << 8)
121#define INT_CCSTO (1 << 5)
122#define INT_CRCSTO (1 << 4)
123#define INT_WDATTO (1 << 3)
124#define INT_RDATTO (1 << 2)
125#define INT_RBSYTO (1 << 1)
126#define INT_RSPTO (1 << 0)
127#define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \
128 INT_RDATERR | INT_RIDXERR | INT_RSPERR | \
129 INT_CCSTO | INT_CRCSTO | INT_WDATTO | \
130 INT_RDATTO | INT_RBSYTO | INT_RSPTO)
131
132/* CE_INT_MASK */
133#define MASK_ALL 0x00000000
134#define MASK_MCCSDE (1 << 29)
135#define MASK_MCMD12DRE (1 << 26)
136#define MASK_MCMD12RBE (1 << 25)
137#define MASK_MCMD12CRE (1 << 24)
138#define MASK_MDTRANE (1 << 23)
139#define MASK_MBUFRE (1 << 22)
140#define MASK_MBUFWEN (1 << 21)
141#define MASK_MBUFREN (1 << 20)
142#define MASK_MCCSRCV (1 << 19)
143#define MASK_MRBSYE (1 << 17)
144#define MASK_MCRSPE (1 << 16)
145#define MASK_MCMDVIO (1 << 15)
146#define MASK_MBUFVIO (1 << 14)
147#define MASK_MWDATERR (1 << 11)
148#define MASK_MRDATERR (1 << 10)
149#define MASK_MRIDXERR (1 << 9)
150#define MASK_MRSPERR (1 << 8)
151#define MASK_MCCSTO (1 << 5)
152#define MASK_MCRCSTO (1 << 4)
153#define MASK_MWDATTO (1 << 3)
154#define MASK_MRDATTO (1 << 2)
155#define MASK_MRBSYTO (1 << 1)
156#define MASK_MRSPTO (1 << 0)
157
158/* CE_HOST_STS1 */
159#define STS1_CMDSEQ (1 << 31)
160
161/* CE_HOST_STS2 */
162#define STS2_CRCSTE (1 << 31)
163#define STS2_CRC16E (1 << 30)
164#define STS2_AC12CRCE (1 << 29)
165#define STS2_RSPCRC7E (1 << 28)
166#define STS2_CRCSTEBE (1 << 27)
167#define STS2_RDATEBE (1 << 26)
168#define STS2_AC12REBE (1 << 25)
169#define STS2_RSPEBE (1 << 24)
170#define STS2_AC12IDXE (1 << 23)
171#define STS2_RSPIDXE (1 << 22)
172#define STS2_CCSTO (1 << 15)
173#define STS2_RDATTO (1 << 14)
174#define STS2_DATBSYTO (1 << 13)
175#define STS2_CRCSTTO (1 << 12)
176#define STS2_AC12BSYTO (1 << 11)
177#define STS2_RSPBSYTO (1 << 10)
178#define STS2_AC12RSPTO (1 << 9)
179#define STS2_RSPTO (1 << 8)
180#define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \
181 STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE)
182#define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \
183 STS2_DATBSYTO | STS2_CRCSTTO | \
184 STS2_AC12BSYTO | STS2_RSPBSYTO | \
185 STS2_AC12RSPTO | STS2_RSPTO)
186
187/* CE_VERSION */
188#define SOFT_RST_ON (1 << 31)
189#define SOFT_RST_OFF (0 << 31)
190
191#define CLKDEV_EMMC_DATA 52000000 /* 52MHz */
192#define CLKDEV_MMC_DATA 20000000 /* 20MHz */
193#define CLKDEV_INIT 400000 /* 400 KHz */
194
195struct sh_mmcif_host {
196 struct mmc_host *mmc;
197 struct mmc_data *data;
198 struct mmc_command *cmd;
199 struct platform_device *pd;
200 struct clk *hclk;
201 unsigned int clk;
202 int bus_width;
203 u16 wait_int;
204 u16 sd_error;
205 long timeout;
206 void __iomem *addr;
207 wait_queue_head_t intr_wait;
208};
209
210static inline u32 sh_mmcif_readl(struct sh_mmcif_host *host, unsigned int reg)
211{
212 return readl(host->addr + reg);
213}
214
215static inline void sh_mmcif_writel(struct sh_mmcif_host *host,
216 unsigned int reg, u32 val)
217{
218 writel(val, host->addr + reg);
219}
220
221static inline void sh_mmcif_bitset(struct sh_mmcif_host *host,
222 unsigned int reg, u32 val)
223{
224 writel(val | sh_mmcif_readl(host, reg), host->addr + reg);
225}
226
227static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
228 unsigned int reg, u32 val)
229{
230 writel(~val & sh_mmcif_readl(host, reg), host->addr + reg);
231}
232
233
234static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
235{
236 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
237
238 sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
239 sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR);
240
241 if (!clk)
242 return;
243 if (p->sup_pclk && clk == host->clk)
244 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
245 else
246 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
247 (ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16));
248
249 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
250}
251
252static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
253{
254 u32 tmp;
255
256 tmp = 0x010f0000 & sh_mmcif_readl(host, MMCIF_CE_CLK_CTRL);
257
258 sh_mmcif_writel(host, MMCIF_CE_VERSION, SOFT_RST_ON);
259 sh_mmcif_writel(host, MMCIF_CE_VERSION, SOFT_RST_OFF);
260 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp |
261 SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
262 /* byte swap on */
263 sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
264}
265
266static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
267{
268 u32 state1, state2;
269 int ret, timeout = 10000000;
270
271 host->sd_error = 0;
272 host->wait_int = 0;
273
274 state1 = sh_mmcif_readl(host, MMCIF_CE_HOST_STS1);
275 state2 = sh_mmcif_readl(host, MMCIF_CE_HOST_STS2);
276 pr_debug("%s: ERR HOST_STS1 = %08x\n", \
277 DRIVER_NAME, sh_mmcif_readl(host, MMCIF_CE_HOST_STS1));
278 pr_debug("%s: ERR HOST_STS2 = %08x\n", \
279 DRIVER_NAME, sh_mmcif_readl(host, MMCIF_CE_HOST_STS2));
280
281 if (state1 & STS1_CMDSEQ) {
282 sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
283 sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK);
284 while (1) {
285 timeout--;
286 if (timeout < 0) {
287 pr_err(DRIVER_NAME": Forceed end of " \
288 "command sequence timeout err\n");
289 return -EIO;
290 }
291 if (!(sh_mmcif_readl(host, MMCIF_CE_HOST_STS1)
292 & STS1_CMDSEQ))
293 break;
294 mdelay(1);
295 }
296 sh_mmcif_sync_reset(host);
297 pr_debug(DRIVER_NAME": Forced end of command sequence\n");
298 return -EIO;
299 }
300
301 if (state2 & STS2_CRC_ERR) {
302 pr_debug(DRIVER_NAME": Happened CRC error\n");
303 ret = -EIO;
304 } else if (state2 & STS2_TIMEOUT_ERR) {
305 pr_debug(DRIVER_NAME": Happened Timeout error\n");
306 ret = -ETIMEDOUT;
307 } else {
308 pr_debug(DRIVER_NAME": Happened End/Index error\n");
309 ret = -EIO;
310 }
311 return ret;
312}
313
314static int sh_mmcif_single_read(struct sh_mmcif_host *host,
315 struct mmc_request *mrq)
316{
317 struct mmc_data *data = mrq->data;
318 long time;
319 u32 blocksize, i, *p = sg_virt(data->sg);
320
321 host->wait_int = 0;
322
323 /* buf read enable */
324 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
325 time = wait_event_interruptible_timeout(host->intr_wait,
326 host->wait_int == 1 ||
327 host->sd_error == 1, host->timeout);
328 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
329 return sh_mmcif_error_manage(host);
330
331 host->wait_int = 0;
332 blocksize = (BLOCK_SIZE_MASK &
333 sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET)) + 3;
334 for (i = 0; i < blocksize / 4; i++)
335 *p++ = sh_mmcif_readl(host, MMCIF_CE_DATA);
336
337 /* buffer read end */
338 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
339 time = wait_event_interruptible_timeout(host->intr_wait,
340 host->wait_int == 1 ||
341 host->sd_error == 1, host->timeout);
342 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
343 return sh_mmcif_error_manage(host);
344
345 host->wait_int = 0;
346 return 0;
347}
348
349static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
350 struct mmc_request *mrq)
351{
352 struct mmc_data *data = mrq->data;
353 long time;
354 u32 blocksize, i, j, sec, *p;
355
356 blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET);
357 for (j = 0; j < data->sg_len; j++) {
358 p = sg_virt(data->sg);
359 host->wait_int = 0;
360 for (sec = 0; sec < data->sg->length / blocksize; sec++) {
361 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
362 /* buf read enable */
363 time = wait_event_interruptible_timeout(host->intr_wait,
364 host->wait_int == 1 ||
365 host->sd_error == 1, host->timeout);
366
367 if (host->wait_int != 1 &&
368 (time == 0 || host->sd_error != 0))
369 return sh_mmcif_error_manage(host);
370
371 host->wait_int = 0;
372 for (i = 0; i < blocksize / 4; i++)
373 *p++ = sh_mmcif_readl(host, MMCIF_CE_DATA);
374 }
375 if (j < data->sg_len - 1)
376 data->sg++;
377 }
378 return 0;
379}
380
381static int sh_mmcif_single_write(struct sh_mmcif_host *host,
382 struct mmc_request *mrq)
383{
384 struct mmc_data *data = mrq->data;
385 long time;
386 u32 blocksize, i, *p = sg_virt(data->sg);
387
388 host->wait_int = 0;
389 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
390
391 /* buf write enable */
392 time = wait_event_interruptible_timeout(host->intr_wait,
393 host->wait_int == 1 ||
394 host->sd_error == 1, host->timeout);
395 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
396 return sh_mmcif_error_manage(host);
397
398 host->wait_int = 0;
399 blocksize = (BLOCK_SIZE_MASK &
400 sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET)) + 3;
401 for (i = 0; i < blocksize / 4; i++)
402 sh_mmcif_writel(host, MMCIF_CE_DATA, *p++);
403
404 /* buffer write end */
405 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
406
407 time = wait_event_interruptible_timeout(host->intr_wait,
408 host->wait_int == 1 ||
409 host->sd_error == 1, host->timeout);
410 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
411 return sh_mmcif_error_manage(host);
412
413 host->wait_int = 0;
414 return 0;
415}
416
417static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
418 struct mmc_request *mrq)
419{
420 struct mmc_data *data = mrq->data;
421 long time;
422 u32 i, sec, j, blocksize, *p;
423
424 blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host, MMCIF_CE_BLOCK_SET);
425
426 for (j = 0; j < data->sg_len; j++) {
427 p = sg_virt(data->sg);
428 host->wait_int = 0;
429 for (sec = 0; sec < data->sg->length / blocksize; sec++) {
430 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
431 /* buf write enable*/
432 time = wait_event_interruptible_timeout(host->intr_wait,
433 host->wait_int == 1 ||
434 host->sd_error == 1, host->timeout);
435
436 if (host->wait_int != 1 &&
437 (time == 0 || host->sd_error != 0))
438 return sh_mmcif_error_manage(host);
439
440 host->wait_int = 0;
441 for (i = 0; i < blocksize / 4; i++)
442 sh_mmcif_writel(host, MMCIF_CE_DATA, *p++);
443 }
444 if (j < data->sg_len - 1)
445 data->sg++;
446 }
447 return 0;
448}
449
450static void sh_mmcif_get_response(struct sh_mmcif_host *host,
451 struct mmc_command *cmd)
452{
453 if (cmd->flags & MMC_RSP_136) {
454 cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP3);
455 cmd->resp[1] = sh_mmcif_readl(host, MMCIF_CE_RESP2);
456 cmd->resp[2] = sh_mmcif_readl(host, MMCIF_CE_RESP1);
457 cmd->resp[3] = sh_mmcif_readl(host, MMCIF_CE_RESP0);
458 } else
459 cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP0);
460}
461
462static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
463 struct mmc_command *cmd)
464{
465 cmd->resp[0] = sh_mmcif_readl(host, MMCIF_CE_RESP_CMD12);
466}
467
468static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
469 struct mmc_request *mrq, struct mmc_command *cmd, u32 opc)
470{
471 u32 tmp = 0;
472
473 /* Response Type check */
474 switch (mmc_resp_type(cmd)) {
475 case MMC_RSP_NONE:
476 tmp |= CMD_SET_RTYP_NO;
477 break;
478 case MMC_RSP_R1:
479 case MMC_RSP_R1B:
480 case MMC_RSP_R3:
481 tmp |= CMD_SET_RTYP_6B;
482 break;
483 case MMC_RSP_R2:
484 tmp |= CMD_SET_RTYP_17B;
485 break;
486 default:
487 pr_err(DRIVER_NAME": Not support type response.\n");
488 break;
489 }
490 switch (opc) {
491 /* RBSY */
492 case MMC_SWITCH:
493 case MMC_STOP_TRANSMISSION:
494 case MMC_SET_WRITE_PROT:
495 case MMC_CLR_WRITE_PROT:
496 case MMC_ERASE:
497 case MMC_GEN_CMD:
498 tmp |= CMD_SET_RBSY;
499 break;
500 }
501 /* WDAT / DATW */
502 if (host->data) {
503 tmp |= CMD_SET_WDAT;
504 switch (host->bus_width) {
505 case MMC_BUS_WIDTH_1:
506 tmp |= CMD_SET_DATW_1;
507 break;
508 case MMC_BUS_WIDTH_4:
509 tmp |= CMD_SET_DATW_4;
510 break;
511 case MMC_BUS_WIDTH_8:
512 tmp |= CMD_SET_DATW_8;
513 break;
514 default:
515 pr_err(DRIVER_NAME": Not support bus width.\n");
516 break;
517 }
518 }
519 /* DWEN */
520 if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK)
521 tmp |= CMD_SET_DWEN;
522 /* CMLTE/CMD12EN */
523 if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) {
524 tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
525 sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET,
526 mrq->data->blocks << 16);
527 }
528 /* RIDXC[1:0] check bits */
529 if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID ||
530 opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
531 tmp |= CMD_SET_RIDXC_BITS;
532 /* RCRC7C[1:0] check bits */
533 if (opc == MMC_SEND_OP_COND)
534 tmp |= CMD_SET_CRC7C_BITS;
535 /* RCRC7C[1:0] internal CRC7 */
536 if (opc == MMC_ALL_SEND_CID ||
537 opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
538 tmp |= CMD_SET_CRC7C_INTERNAL;
539
540 return opc = ((opc << 24) | tmp);
541}
542
543static u32 sh_mmcif_data_trans(struct sh_mmcif_host *host,
544 struct mmc_request *mrq, u32 opc)
545{
546 u32 ret;
547
548 switch (opc) {
549 case MMC_READ_MULTIPLE_BLOCK:
550 ret = sh_mmcif_multi_read(host, mrq);
551 break;
552 case MMC_WRITE_MULTIPLE_BLOCK:
553 ret = sh_mmcif_multi_write(host, mrq);
554 break;
555 case MMC_WRITE_BLOCK:
556 ret = sh_mmcif_single_write(host, mrq);
557 break;
558 case MMC_READ_SINGLE_BLOCK:
559 case MMC_SEND_EXT_CSD:
560 ret = sh_mmcif_single_read(host, mrq);
561 break;
562 default:
563 pr_err(DRIVER_NAME": NOT SUPPORT CMD = d'%08d\n", opc);
564 ret = -EINVAL;
565 break;
566 }
567 return ret;
568}
569
570static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
571 struct mmc_request *mrq, struct mmc_command *cmd)
572{
573 long time;
574 int ret = 0, mask = 0;
575 u32 opc = cmd->opcode;
576
577 host->cmd = cmd;
578
579 switch (opc) {
580 /* respons busy check */
581 case MMC_SWITCH:
582 case MMC_STOP_TRANSMISSION:
583 case MMC_SET_WRITE_PROT:
584 case MMC_CLR_WRITE_PROT:
585 case MMC_ERASE:
586 case MMC_GEN_CMD:
587 mask = MASK_MRBSYE;
588 break;
589 default:
590 mask = MASK_MCRSPE;
591 break;
592 }
593 mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
594 MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
595 MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
596 MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
597
598 if (host->data) {
599 sh_mmcif_writel(host, MMCIF_CE_BLOCK_SET, 0);
600 sh_mmcif_writel(host, MMCIF_CE_BLOCK_SET, mrq->data->blksz);
601 }
602 opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);
603
604 sh_mmcif_writel(host, MMCIF_CE_INT, 0xD80430C0);
605 sh_mmcif_writel(host, MMCIF_CE_INT_MASK, mask);
606 /* set arg */
607 sh_mmcif_writel(host, MMCIF_CE_ARG, cmd->arg);
608 host->wait_int = 0;
609 /* set cmd */
610 sh_mmcif_writel(host, MMCIF_CE_CMD_SET, opc);
611
612 time = wait_event_interruptible_timeout(host->intr_wait,
613 host->wait_int == 1 || host->sd_error == 1, host->timeout);
614 if (host->wait_int != 1 && time == 0) {
615 cmd->error = sh_mmcif_error_manage(host);
616 return;
617 }
618 if (host->sd_error) {
619 switch (cmd->opcode) {
620 case MMC_ALL_SEND_CID:
621 case MMC_SELECT_CARD:
622 case MMC_APP_CMD:
623 cmd->error = -ETIMEDOUT;
624 break;
625 default:
626 pr_debug("%s: Cmd(d'%d) err\n",
627 DRIVER_NAME, cmd->opcode);
628 cmd->error = sh_mmcif_error_manage(host);
629 break;
630 }
631 host->sd_error = 0;
632 host->wait_int = 0;
633 return;
634 }
635 if (!(cmd->flags & MMC_RSP_PRESENT)) {
636 cmd->error = ret;
637 host->wait_int = 0;
638 return;
639 }
640 if (host->wait_int == 1) {
641 sh_mmcif_get_response(host, cmd);
642 host->wait_int = 0;
643 }
644 if (host->data) {
645 ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
646 if (ret < 0)
647 mrq->data->bytes_xfered = 0;
648 else
649 mrq->data->bytes_xfered =
650 mrq->data->blocks * mrq->data->blksz;
651 }
652 cmd->error = ret;
653}
654
655static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
656 struct mmc_request *mrq, struct mmc_command *cmd)
657{
658 long time;
659
660 if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
661 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
662 else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
663 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
664 else {
665 pr_err(DRIVER_NAME": not support stop cmd\n");
666 cmd->error = sh_mmcif_error_manage(host);
667 return;
668 }
669
670 time = wait_event_interruptible_timeout(host->intr_wait,
671 host->wait_int == 1 ||
672 host->sd_error == 1, host->timeout);
673 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) {
674 cmd->error = sh_mmcif_error_manage(host);
675 return;
676 }
677 sh_mmcif_get_cmd12response(host, cmd);
678 host->wait_int = 0;
679 cmd->error = 0;
680}
681
682static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
683{
684 struct sh_mmcif_host *host = mmc_priv(mmc);
685
686 switch (mrq->cmd->opcode) {
687 /* MMCIF does not support SD/SDIO command */
688 case SD_IO_SEND_OP_COND:
689 case MMC_APP_CMD:
690 mrq->cmd->error = -ETIMEDOUT;
691 mmc_request_done(mmc, mrq);
692 return;
693 case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
694 if (!mrq->data) {
695 /* send_if_cond cmd (not support) */
696 mrq->cmd->error = -ETIMEDOUT;
697 mmc_request_done(mmc, mrq);
698 return;
699 }
700 break;
701 default:
702 break;
703 }
704 host->data = mrq->data;
705 sh_mmcif_start_cmd(host, mrq, mrq->cmd);
706 host->data = NULL;
707
708 if (mrq->cmd->error != 0) {
709 mmc_request_done(mmc, mrq);
710 return;
711 }
712 if (mrq->stop)
713 sh_mmcif_stop_cmd(host, mrq, mrq->stop);
714 mmc_request_done(mmc, mrq);
715}
716
717static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
718{
719 struct sh_mmcif_host *host = mmc_priv(mmc);
720 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
721
722 if (ios->power_mode == MMC_POWER_OFF) {
723 /* clock stop */
724 sh_mmcif_clock_control(host, 0);
725 if (p->down_pwr)
726 p->down_pwr(host->pd);
727 return;
728 } else if (ios->power_mode == MMC_POWER_UP) {
729 if (p->set_pwr)
730 p->set_pwr(host->pd, ios->power_mode);
731 }
732
733 if (ios->clock)
734 sh_mmcif_clock_control(host, ios->clock);
735
736 host->bus_width = ios->bus_width;
737}
738
739static struct mmc_host_ops sh_mmcif_ops = {
740 .request = sh_mmcif_request,
741 .set_ios = sh_mmcif_set_ios,
742};
743
744static void sh_mmcif_detect(struct mmc_host *mmc)
745{
746 mmc_detect_change(mmc, 0);
747}
748
749static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
750{
751 struct sh_mmcif_host *host = dev_id;
752 u32 state = 0;
753 int err = 0;
754
755 state = sh_mmcif_readl(host, MMCIF_CE_INT);
756
757 if (state & INT_RBSYE) {
758 sh_mmcif_writel(host, MMCIF_CE_INT, ~(INT_RBSYE | INT_CRSPE));
759 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
760 } else if (state & INT_CRSPE) {
761 sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_CRSPE);
762 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE);
763 } else if (state & INT_BUFREN) {
764 sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFREN);
765 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
766 } else if (state & INT_BUFWEN) {
767 sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFWEN);
768 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
769 } else if (state & INT_CMD12DRE) {
770 sh_mmcif_writel(host, MMCIF_CE_INT,
771 ~(INT_CMD12DRE | INT_CMD12RBE |
772 INT_CMD12CRE | INT_BUFRE));
773 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
774 } else if (state & INT_BUFRE) {
775 sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_BUFRE);
776 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
777 } else if (state & INT_DTRANE) {
778 sh_mmcif_writel(host, MMCIF_CE_INT, ~INT_DTRANE);
779 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
780 } else if (state & INT_CMD12RBE) {
781 sh_mmcif_writel(host, MMCIF_CE_INT,
782 ~(INT_CMD12RBE | INT_CMD12CRE));
783 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
784 } else if (state & INT_ERR_STS) {
785 /* err interrupts */
786 sh_mmcif_writel(host, MMCIF_CE_INT, ~state);
787 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
788 err = 1;
789 } else {
790 pr_debug("%s: Not support int\n", DRIVER_NAME);
791 sh_mmcif_writel(host, MMCIF_CE_INT, ~state);
792 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
793 err = 1;
794 }
795 if (err) {
796 host->sd_error = 1;
797 pr_debug("%s: int err state = %08x\n", DRIVER_NAME, state);
798 }
799 host->wait_int = 1;
800 wake_up(&host->intr_wait);
801
802 return IRQ_HANDLED;
803}
804
805static int __devinit sh_mmcif_probe(struct platform_device *pdev)
806{
807 int ret = 0, irq[2];
808 struct mmc_host *mmc;
809 struct sh_mmcif_host *host = NULL;
810 struct sh_mmcif_plat_data *pd = NULL;
811 struct resource *res;
812 void __iomem *reg;
813 char clk_name[8];
814
815 irq[0] = platform_get_irq(pdev, 0);
816 irq[1] = platform_get_irq(pdev, 1);
817 if (irq[0] < 0 || irq[1] < 0) {
818 pr_err(DRIVER_NAME": Get irq error\n");
819 return -ENXIO;
820 }
821 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
822 if (!res) {
823 dev_err(&pdev->dev, "platform_get_resource error.\n");
824 return -ENXIO;
825 }
826 reg = ioremap(res->start, resource_size(res));
827 if (!reg) {
828 dev_err(&pdev->dev, "ioremap error.\n");
829 return -ENOMEM;
830 }
831 pd = (struct sh_mmcif_plat_data *)(pdev->dev.platform_data);
832 if (!pd) {
833 dev_err(&pdev->dev, "sh_mmcif plat data error.\n");
834 ret = -ENXIO;
835 goto clean_up;
836 }
837 mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev);
838 if (!mmc) {
839 ret = -ENOMEM;
840 goto clean_up;
841 }
842 host = mmc_priv(mmc);
843 host->mmc = mmc;
844 host->addr = reg;
845 host->timeout = 1000;
846
847 snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id);
848 host->hclk = clk_get(&pdev->dev, clk_name);
849 if (IS_ERR(host->hclk)) {
850 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
851 ret = PTR_ERR(host->hclk);
852 goto clean_up1;
853 }
854 clk_enable(host->hclk);
855 host->clk = clk_get_rate(host->hclk);
856 host->pd = pdev;
857
858 init_waitqueue_head(&host->intr_wait);
859
860 mmc->ops = &sh_mmcif_ops;
861 mmc->f_max = host->clk;
862 /* close to 400KHz */
863 if (mmc->f_max < 51200000)
864 mmc->f_min = mmc->f_max / 128;
865 else if (mmc->f_max < 102400000)
866 mmc->f_min = mmc->f_max / 256;
867 else
868 mmc->f_min = mmc->f_max / 512;
869 if (pd->ocr)
870 mmc->ocr_avail = pd->ocr;
871 mmc->caps = MMC_CAP_MMC_HIGHSPEED;
872 if (pd->caps)
873 mmc->caps |= pd->caps;
874 mmc->max_phys_segs = 128;
875 mmc->max_hw_segs = 128;
876 mmc->max_blk_size = 512;
877 mmc->max_blk_count = 65535;
878 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
879 mmc->max_seg_size = mmc->max_req_size;
880
881 sh_mmcif_sync_reset(host);
882 platform_set_drvdata(pdev, host);
883 mmc_add_host(mmc);
884
885 ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
886 if (ret) {
887 pr_err(DRIVER_NAME": request_irq error (sh_mmc:error)\n");
888 goto clean_up2;
889 }
890 ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
891 if (ret) {
892 free_irq(irq[0], host);
893 pr_err(DRIVER_NAME": request_irq error (sh_mmc:int)\n");
894 goto clean_up2;
895 }
896
897 sh_mmcif_writel(host, MMCIF_CE_INT_MASK, MASK_ALL);
898 sh_mmcif_detect(host->mmc);
899
900 pr_info("%s: driver version %s\n", DRIVER_NAME, DRIVER_VERSION);
901 pr_debug("%s: chip ver H'%04x\n", DRIVER_NAME,
902 sh_mmcif_readl(host, MMCIF_CE_VERSION) & 0x0000ffff);
903 return ret;
904
905clean_up2:
906 clk_disable(host->hclk);
907clean_up1:
908 mmc_free_host(mmc);
909clean_up:
910 if (reg)
911 iounmap(reg);
912 return ret;
913}
914
915static int __devexit sh_mmcif_remove(struct platform_device *pdev)
916{
917 struct sh_mmcif_host *host = platform_get_drvdata(pdev);
918 int irq[2];
919
920 sh_mmcif_writel(host, MMCIF_CE_INT_MASK, MASK_ALL);
921
922 irq[0] = platform_get_irq(pdev, 0);
923 irq[1] = platform_get_irq(pdev, 1);
924
925 if (host->addr)
926 iounmap(host->addr);
927
928 platform_set_drvdata(pdev, NULL);
929 mmc_remove_host(host->mmc);
930
931 free_irq(irq[0], host);
932 free_irq(irq[1], host);
933
934 clk_disable(host->hclk);
935 mmc_free_host(host->mmc);
936
937 return 0;
938}
939
940static struct platform_driver sh_mmcif_driver = {
941 .probe = sh_mmcif_probe,
942 .remove = sh_mmcif_remove,
943 .driver = {
944 .name = DRIVER_NAME,
945 },
946};
947
948static int __init sh_mmcif_init(void)
949{
950 return platform_driver_register(&sh_mmcif_driver);
951}
952
953static void __exit sh_mmcif_exit(void)
954{
955 platform_driver_unregister(&sh_mmcif_driver);
956}
957
958module_init(sh_mmcif_init);
959module_exit(sh_mmcif_exit);
960
961
962MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
963MODULE_LICENSE("GPL");
964MODULE_ALIAS(DRIVER_NAME);
965MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>");
Linux 6.x block layer and io_uring tree(s)