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[net-next-2.6.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
fdc50a94
YG		 33/* CE_CMD_SET */
34#define CMD_MASK 0x3f000000
35#define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22))
36#define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */
37#define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */
38#define CMD_SET_RBSY (1 << 21) /* R1b */
39#define CMD_SET_CCSEN (1 << 20)
40#define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */
41#define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */
42#define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */
43#define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */
44#define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */
45#define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */
46#define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */
47#define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/
48#define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/
49#define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/
50#define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/
51#define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */
52#define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */
53#define CMD_SET_OPDM (1 << 6) /* 1: open/drain */
54#define CMD_SET_CCSH (1 << 5)
55#define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */
56#define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */
57#define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */
58
59/* CE_CMD_CTRL */
60#define CMD_CTRL_BREAK (1 << 0)
61
62/* CE_BLOCK_SET */
63#define BLOCK_SIZE_MASK 0x0000ffff
64
65/* CE_CLK_CTRL */
66#define CLK_ENABLE (1 << 24) /* 1: output mmc clock */
67#define CLK_CLEAR ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
68#define CLK_SUP_PCLK ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
69#define SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */
70#define SRBSYTO_29 ((1 << 11) | (1 << 10) | \
71 (1 << 9) | (1 << 8)) /* resp busy timeout */
72#define SRWDTO_29 ((1 << 7) | (1 << 6) | \
73 (1 << 5) | (1 << 4)) /* read/write timeout */
74#define SCCSTO_29 ((1 << 3) | (1 << 2) | \
75 (1 << 1) | (1 << 0)) /* ccs timeout */
76
77/* CE_BUF_ACC */
78#define BUF_ACC_DMAWEN (1 << 25)
79#define BUF_ACC_DMAREN (1 << 24)
80#define BUF_ACC_BUSW_32 (0 << 17)
81#define BUF_ACC_BUSW_16 (1 << 17)
82#define BUF_ACC_ATYP (1 << 16)
83
84/* CE_INT */
85#define INT_CCSDE (1 << 29)
86#define INT_CMD12DRE (1 << 26)
87#define INT_CMD12RBE (1 << 25)
88#define INT_CMD12CRE (1 << 24)
89#define INT_DTRANE (1 << 23)
90#define INT_BUFRE (1 << 22)
91#define INT_BUFWEN (1 << 21)
92#define INT_BUFREN (1 << 20)
93#define INT_CCSRCV (1 << 19)
94#define INT_RBSYE (1 << 17)
95#define INT_CRSPE (1 << 16)
96#define INT_CMDVIO (1 << 15)
97#define INT_BUFVIO (1 << 14)
98#define INT_WDATERR (1 << 11)
99#define INT_RDATERR (1 << 10)
100#define INT_RIDXERR (1 << 9)
101#define INT_RSPERR (1 << 8)
102#define INT_CCSTO (1 << 5)
103#define INT_CRCSTO (1 << 4)
104#define INT_WDATTO (1 << 3)
105#define INT_RDATTO (1 << 2)
106#define INT_RBSYTO (1 << 1)
107#define INT_RSPTO (1 << 0)
108#define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \
109 INT_RDATERR | INT_RIDXERR | INT_RSPERR | \
110 INT_CCSTO | INT_CRCSTO | INT_WDATTO | \
111 INT_RDATTO | INT_RBSYTO | INT_RSPTO)
112
113/* CE_INT_MASK */
114#define MASK_ALL 0x00000000
115#define MASK_MCCSDE (1 << 29)
116#define MASK_MCMD12DRE (1 << 26)
117#define MASK_MCMD12RBE (1 << 25)
118#define MASK_MCMD12CRE (1 << 24)
119#define MASK_MDTRANE (1 << 23)
120#define MASK_MBUFRE (1 << 22)
121#define MASK_MBUFWEN (1 << 21)
122#define MASK_MBUFREN (1 << 20)
123#define MASK_MCCSRCV (1 << 19)
124#define MASK_MRBSYE (1 << 17)
125#define MASK_MCRSPE (1 << 16)
126#define MASK_MCMDVIO (1 << 15)
127#define MASK_MBUFVIO (1 << 14)
128#define MASK_MWDATERR (1 << 11)
129#define MASK_MRDATERR (1 << 10)
130#define MASK_MRIDXERR (1 << 9)
131#define MASK_MRSPERR (1 << 8)
132#define MASK_MCCSTO (1 << 5)
133#define MASK_MCRCSTO (1 << 4)
134#define MASK_MWDATTO (1 << 3)
135#define MASK_MRDATTO (1 << 2)
136#define MASK_MRBSYTO (1 << 1)
137#define MASK_MRSPTO (1 << 0)
138
139/* CE_HOST_STS1 */
140#define STS1_CMDSEQ (1 << 31)
141
142/* CE_HOST_STS2 */
143#define STS2_CRCSTE (1 << 31)
144#define STS2_CRC16E (1 << 30)
145#define STS2_AC12CRCE (1 << 29)
146#define STS2_RSPCRC7E (1 << 28)
147#define STS2_CRCSTEBE (1 << 27)
148#define STS2_RDATEBE (1 << 26)
149#define STS2_AC12REBE (1 << 25)
150#define STS2_RSPEBE (1 << 24)
151#define STS2_AC12IDXE (1 << 23)
152#define STS2_RSPIDXE (1 << 22)
153#define STS2_CCSTO (1 << 15)
154#define STS2_RDATTO (1 << 14)
155#define STS2_DATBSYTO (1 << 13)
156#define STS2_CRCSTTO (1 << 12)
157#define STS2_AC12BSYTO (1 << 11)
158#define STS2_RSPBSYTO (1 << 10)
159#define STS2_AC12RSPTO (1 << 9)
160#define STS2_RSPTO (1 << 8)
161#define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \
162 STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE)
163#define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \
164 STS2_DATBSYTO | STS2_CRCSTTO | \
165 STS2_AC12BSYTO | STS2_RSPBSYTO | \
166 STS2_AC12RSPTO | STS2_RSPTO)
167
168/* CE_VERSION */
169#define SOFT_RST_ON (1 << 31)
170#define SOFT_RST_OFF (0 << 31)
171
172#define CLKDEV_EMMC_DATA 52000000 /* 52MHz */
173#define CLKDEV_MMC_DATA 20000000 /* 20MHz */
174#define CLKDEV_INIT 400000 /* 400 KHz */
175
176struct sh_mmcif_host {
177 struct mmc_host *mmc;
178 struct mmc_data *data;
179 struct mmc_command *cmd;
180 struct platform_device *pd;
181 struct clk *hclk;
182 unsigned int clk;
183 int bus_width;
184 u16 wait_int;
185 u16 sd_error;
186 long timeout;
187 void __iomem *addr;
188 wait_queue_head_t intr_wait;
189};
190
fdc50a94
YG		 191
192static inline void sh_mmcif_bitset(struct sh_mmcif_host *host,
193 unsigned int reg, u32 val)
194{
487d9fc5 195 writel(val | readl(host->addr + reg), host->addr + reg);
fdc50a94
YG		 196}
197
198static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host,
199 unsigned int reg, u32 val)
200{
487d9fc5 201 writel(~val & readl(host->addr + reg), host->addr + reg);
fdc50a94
YG		 202}
203
204
205static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
206{
207 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
208
209 sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
210 sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR);
211
212 if (!clk)
213 return;
214 if (p->sup_pclk && clk == host->clk)
215 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK);
216 else
217 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR &
218 (ilog2(__rounddown_pow_of_two(host->clk / clk)) << 16));
219
220 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE);
221}
222
223static void sh_mmcif_sync_reset(struct sh_mmcif_host *host)
224{
225 u32 tmp;
226
487d9fc5 227 tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL);
fdc50a94 228
487d9fc5
MD		 229 sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON);
230 sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF);
fdc50a94
YG		 231 sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp |
232 SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
233 /* byte swap on */
234 sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
235}
236
237static int sh_mmcif_error_manage(struct sh_mmcif_host *host)
238{
239 u32 state1, state2;
240 int ret, timeout = 10000000;
241
242 host->sd_error = 0;
243 host->wait_int = 0;
244
487d9fc5
MD		 245 state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1);
246 state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2);
247 pr_debug("%s: ERR HOST_STS1 = %08x\n", DRIVER_NAME, state1);
248 pr_debug("%s: ERR HOST_STS2 = %08x\n", DRIVER_NAME, state2);
fdc50a94
YG		 249
250 if (state1 & STS1_CMDSEQ) {
251 sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK);
252 sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK);
253 while (1) {
254 timeout--;
255 if (timeout < 0) {
256 pr_err(DRIVER_NAME": Forceed end of " \
257 "command sequence timeout err\n");
258 return -EIO;
259 }
487d9fc5 260 if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1)
fdc50a94
YG		 261 & STS1_CMDSEQ))
262 break;
263 mdelay(1);
264 }
265 sh_mmcif_sync_reset(host);
266 pr_debug(DRIVER_NAME": Forced end of command sequence\n");
267 return -EIO;
268 }
269
270 if (state2 & STS2_CRC_ERR) {
271 pr_debug(DRIVER_NAME": Happened CRC error\n");
272 ret = -EIO;
273 } else if (state2 & STS2_TIMEOUT_ERR) {
274 pr_debug(DRIVER_NAME": Happened Timeout error\n");
275 ret = -ETIMEDOUT;
276 } else {
277 pr_debug(DRIVER_NAME": Happened End/Index error\n");
278 ret = -EIO;
279 }
280 return ret;
281}
282
283static int sh_mmcif_single_read(struct sh_mmcif_host *host,
284 struct mmc_request *mrq)
285{
286 struct mmc_data *data = mrq->data;
287 long time;
288 u32 blocksize, i, *p = sg_virt(data->sg);
289
290 host->wait_int = 0;
291
292 /* buf read enable */
293 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
294 time = wait_event_interruptible_timeout(host->intr_wait,
295 host->wait_int == 1 ||
296 host->sd_error == 1, host->timeout);
297 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
298 return sh_mmcif_error_manage(host);
299
300 host->wait_int = 0;
301 blocksize = (BLOCK_SIZE_MASK &
487d9fc5 302 sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
fdc50a94 303 for (i = 0; i < blocksize / 4; i++)
487d9fc5 304 *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA);
fdc50a94
YG		 305
306 /* buffer read end */
307 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
308 time = wait_event_interruptible_timeout(host->intr_wait,
309 host->wait_int == 1 ||
310 host->sd_error == 1, host->timeout);
311 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
312 return sh_mmcif_error_manage(host);
313
314 host->wait_int = 0;
315 return 0;
316}
317
318static int sh_mmcif_multi_read(struct sh_mmcif_host *host,
319 struct mmc_request *mrq)
320{
321 struct mmc_data *data = mrq->data;
322 long time;
323 u32 blocksize, i, j, sec, *p;
324
487d9fc5
MD		 325 blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
326 MMCIF_CE_BLOCK_SET);
fdc50a94
YG		 327 for (j = 0; j < data->sg_len; j++) {
328 p = sg_virt(data->sg);
329 host->wait_int = 0;
330 for (sec = 0; sec < data->sg->length / blocksize; sec++) {
331 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
332 /* buf read enable */
333 time = wait_event_interruptible_timeout(host->intr_wait,
334 host->wait_int == 1 ||
335 host->sd_error == 1, host->timeout);
336
337 if (host->wait_int != 1 &&
338 (time == 0 || host->sd_error != 0))
339 return sh_mmcif_error_manage(host);
340
341 host->wait_int = 0;
342 for (i = 0; i < blocksize / 4; i++)
487d9fc5
MD		 343 *p++ = sh_mmcif_readl(host->addr,
344 MMCIF_CE_DATA);
fdc50a94
YG		 345 }
346 if (j < data->sg_len - 1)
347 data->sg++;
348 }
349 return 0;
350}
351
352static int sh_mmcif_single_write(struct sh_mmcif_host *host,
353 struct mmc_request *mrq)
354{
355 struct mmc_data *data = mrq->data;
356 long time;
357 u32 blocksize, i, *p = sg_virt(data->sg);
358
359 host->wait_int = 0;
360 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
361
362 /* buf write enable */
363 time = wait_event_interruptible_timeout(host->intr_wait,
364 host->wait_int == 1 ||
365 host->sd_error == 1, host->timeout);
366 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
367 return sh_mmcif_error_manage(host);
368
369 host->wait_int = 0;
370 blocksize = (BLOCK_SIZE_MASK &
487d9fc5 371 sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET)) + 3;
fdc50a94 372 for (i = 0; i < blocksize / 4; i++)
487d9fc5 373 sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++);
fdc50a94
YG		 374
375 /* buffer write end */
376 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
377
378 time = wait_event_interruptible_timeout(host->intr_wait,
379 host->wait_int == 1 ||
380 host->sd_error == 1, host->timeout);
381 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0))
382 return sh_mmcif_error_manage(host);
383
384 host->wait_int = 0;
385 return 0;
386}
387
388static int sh_mmcif_multi_write(struct sh_mmcif_host *host,
389 struct mmc_request *mrq)
390{
391 struct mmc_data *data = mrq->data;
392 long time;
393 u32 i, sec, j, blocksize, *p;
394
487d9fc5
MD		 395 blocksize = BLOCK_SIZE_MASK & sh_mmcif_readl(host->addr,
396 MMCIF_CE_BLOCK_SET);
fdc50a94
YG		 397
398 for (j = 0; j < data->sg_len; j++) {
399 p = sg_virt(data->sg);
400 host->wait_int = 0;
401 for (sec = 0; sec < data->sg->length / blocksize; sec++) {
402 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
403 /* buf write enable*/
404 time = wait_event_interruptible_timeout(host->intr_wait,
405 host->wait_int == 1 ||
406 host->sd_error == 1, host->timeout);
407
408 if (host->wait_int != 1 &&
409 (time == 0 || host->sd_error != 0))
410 return sh_mmcif_error_manage(host);
411
412 host->wait_int = 0;
413 for (i = 0; i < blocksize / 4; i++)
487d9fc5
MD		 414 sh_mmcif_writel(host->addr,
415 MMCIF_CE_DATA, *p++);
fdc50a94
YG		 416 }
417 if (j < data->sg_len - 1)
418 data->sg++;
419 }
420 return 0;
421}
422
423static void sh_mmcif_get_response(struct sh_mmcif_host *host,
424 struct mmc_command *cmd)
425{
426 if (cmd->flags & MMC_RSP_136) {
487d9fc5
MD		 427 cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3);
428 cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2);
429 cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1);
430 cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
fdc50a94 431 } else
487d9fc5 432 cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0);
fdc50a94
YG		 433}
434
435static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host,
436 struct mmc_command *cmd)
437{
487d9fc5 438 cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12);
fdc50a94
YG		 439}
440
441static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host,
442 struct mmc_request *mrq, struct mmc_command *cmd, u32 opc)
443{
444 u32 tmp = 0;
445
446 /* Response Type check */
447 switch (mmc_resp_type(cmd)) {
448 case MMC_RSP_NONE:
449 tmp |= CMD_SET_RTYP_NO;
450 break;
451 case MMC_RSP_R1:
452 case MMC_RSP_R1B:
453 case MMC_RSP_R3:
454 tmp |= CMD_SET_RTYP_6B;
455 break;
456 case MMC_RSP_R2:
457 tmp |= CMD_SET_RTYP_17B;
458 break;
459 default:
460 pr_err(DRIVER_NAME": Not support type response.\n");
461 break;
462 }
463 switch (opc) {
464 /* RBSY */
465 case MMC_SWITCH:
466 case MMC_STOP_TRANSMISSION:
467 case MMC_SET_WRITE_PROT:
468 case MMC_CLR_WRITE_PROT:
469 case MMC_ERASE:
470 case MMC_GEN_CMD:
471 tmp |= CMD_SET_RBSY;
472 break;
473 }
474 /* WDAT / DATW */
475 if (host->data) {
476 tmp |= CMD_SET_WDAT;
477 switch (host->bus_width) {
478 case MMC_BUS_WIDTH_1:
479 tmp |= CMD_SET_DATW_1;
480 break;
481 case MMC_BUS_WIDTH_4:
482 tmp |= CMD_SET_DATW_4;
483 break;
484 case MMC_BUS_WIDTH_8:
485 tmp |= CMD_SET_DATW_8;
486 break;
487 default:
488 pr_err(DRIVER_NAME": Not support bus width.\n");
489 break;
490 }
491 }
492 /* DWEN */
493 if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK)
494 tmp |= CMD_SET_DWEN;
495 /* CMLTE/CMD12EN */
496 if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) {
497 tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN;
498 sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET,
499 mrq->data->blocks << 16);
500 }
501 /* RIDXC[1:0] check bits */
502 if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID ||
503 opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
504 tmp |= CMD_SET_RIDXC_BITS;
505 /* RCRC7C[1:0] check bits */
506 if (opc == MMC_SEND_OP_COND)
507 tmp |= CMD_SET_CRC7C_BITS;
508 /* RCRC7C[1:0] internal CRC7 */
509 if (opc == MMC_ALL_SEND_CID ||
510 opc == MMC_SEND_CSD || opc == MMC_SEND_CID)
511 tmp |= CMD_SET_CRC7C_INTERNAL;
512
513 return opc = ((opc << 24) | tmp);
514}
515
516static u32 sh_mmcif_data_trans(struct sh_mmcif_host *host,
517 struct mmc_request *mrq, u32 opc)
518{
519 u32 ret;
520
521 switch (opc) {
522 case MMC_READ_MULTIPLE_BLOCK:
523 ret = sh_mmcif_multi_read(host, mrq);
524 break;
525 case MMC_WRITE_MULTIPLE_BLOCK:
526 ret = sh_mmcif_multi_write(host, mrq);
527 break;
528 case MMC_WRITE_BLOCK:
529 ret = sh_mmcif_single_write(host, mrq);
530 break;
531 case MMC_READ_SINGLE_BLOCK:
532 case MMC_SEND_EXT_CSD:
533 ret = sh_mmcif_single_read(host, mrq);
534 break;
535 default:
536 pr_err(DRIVER_NAME": NOT SUPPORT CMD = d'%08d\n", opc);
537 ret = -EINVAL;
538 break;
539 }
540 return ret;
541}
542
543static void sh_mmcif_start_cmd(struct sh_mmcif_host *host,
544 struct mmc_request *mrq, struct mmc_command *cmd)
545{
546 long time;
547 int ret = 0, mask = 0;
548 u32 opc = cmd->opcode;
549
550 host->cmd = cmd;
551
552 switch (opc) {
553 /* respons busy check */
554 case MMC_SWITCH:
555 case MMC_STOP_TRANSMISSION:
556 case MMC_SET_WRITE_PROT:
557 case MMC_CLR_WRITE_PROT:
558 case MMC_ERASE:
559 case MMC_GEN_CMD:
560 mask = MASK_MRBSYE;
561 break;
562 default:
563 mask = MASK_MCRSPE;
564 break;
565 }
566 mask |= MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR |
567 MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR |
568 MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO |
569 MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO;
570
571 if (host->data) {
487d9fc5
MD		 572 sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0);
573 sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET,
574 mrq->data->blksz);
fdc50a94
YG		 575 }
576 opc = sh_mmcif_set_cmd(host, mrq, cmd, opc);
577
487d9fc5
MD		 578 sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0);
579 sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask);
fdc50a94 580 /* set arg */
487d9fc5 581 sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg);
fdc50a94
YG		 582 host->wait_int = 0;
583 /* set cmd */
487d9fc5 584 sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc);
fdc50a94
YG		 585
586 time = wait_event_interruptible_timeout(host->intr_wait,
587 host->wait_int == 1 || host->sd_error == 1, host->timeout);
588 if (host->wait_int != 1 && time == 0) {
589 cmd->error = sh_mmcif_error_manage(host);
590 return;
591 }
592 if (host->sd_error) {
593 switch (cmd->opcode) {
594 case MMC_ALL_SEND_CID:
595 case MMC_SELECT_CARD:
596 case MMC_APP_CMD:
597 cmd->error = -ETIMEDOUT;
598 break;
599 default:
600 pr_debug("%s: Cmd(d'%d) err\n",
601 DRIVER_NAME, cmd->opcode);
602 cmd->error = sh_mmcif_error_manage(host);
603 break;
604 }
605 host->sd_error = 0;
606 host->wait_int = 0;
607 return;
608 }
609 if (!(cmd->flags & MMC_RSP_PRESENT)) {
610 cmd->error = ret;
611 host->wait_int = 0;
612 return;
613 }
614 if (host->wait_int == 1) {
615 sh_mmcif_get_response(host, cmd);
616 host->wait_int = 0;
617 }
618 if (host->data) {
619 ret = sh_mmcif_data_trans(host, mrq, cmd->opcode);
620 if (ret < 0)
621 mrq->data->bytes_xfered = 0;
622 else
623 mrq->data->bytes_xfered =
624 mrq->data->blocks * mrq->data->blksz;
625 }
626 cmd->error = ret;
627}
628
629static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
630 struct mmc_request *mrq, struct mmc_command *cmd)
631{
632 long time;
633
634 if (mrq->cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
635 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
636 else if (mrq->cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
637 sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
638 else {
639 pr_err(DRIVER_NAME": not support stop cmd\n");
640 cmd->error = sh_mmcif_error_manage(host);
641 return;
642 }
643
644 time = wait_event_interruptible_timeout(host->intr_wait,
645 host->wait_int == 1 ||
646 host->sd_error == 1, host->timeout);
647 if (host->wait_int != 1 && (time == 0 || host->sd_error != 0)) {
648 cmd->error = sh_mmcif_error_manage(host);
649 return;
650 }
651 sh_mmcif_get_cmd12response(host, cmd);
652 host->wait_int = 0;
653 cmd->error = 0;
654}
655
656static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
657{
658 struct sh_mmcif_host *host = mmc_priv(mmc);
659
660 switch (mrq->cmd->opcode) {
661 /* MMCIF does not support SD/SDIO command */
662 case SD_IO_SEND_OP_COND:
663 case MMC_APP_CMD:
664 mrq->cmd->error = -ETIMEDOUT;
665 mmc_request_done(mmc, mrq);
666 return;
667 case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
668 if (!mrq->data) {
669 /* send_if_cond cmd (not support) */
670 mrq->cmd->error = -ETIMEDOUT;
671 mmc_request_done(mmc, mrq);
672 return;
673 }
674 break;
675 default:
676 break;
677 }
678 host->data = mrq->data;
679 sh_mmcif_start_cmd(host, mrq, mrq->cmd);
680 host->data = NULL;
681
682 if (mrq->cmd->error != 0) {
683 mmc_request_done(mmc, mrq);
684 return;
685 }
686 if (mrq->stop)
687 sh_mmcif_stop_cmd(host, mrq, mrq->stop);
688 mmc_request_done(mmc, mrq);
689}
690
691static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
692{
693 struct sh_mmcif_host *host = mmc_priv(mmc);
694 struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
695
696 if (ios->power_mode == MMC_POWER_OFF) {
697 /* clock stop */
698 sh_mmcif_clock_control(host, 0);
699 if (p->down_pwr)
700 p->down_pwr(host->pd);
701 return;
702 } else if (ios->power_mode == MMC_POWER_UP) {
703 if (p->set_pwr)
704 p->set_pwr(host->pd, ios->power_mode);
705 }
706
707 if (ios->clock)
708 sh_mmcif_clock_control(host, ios->clock);
709
710 host->bus_width = ios->bus_width;
711}
712
713static struct mmc_host_ops sh_mmcif_ops = {
714 .request = sh_mmcif_request,
715 .set_ios = sh_mmcif_set_ios,
716};
717
718static void sh_mmcif_detect(struct mmc_host *mmc)
719{
720 mmc_detect_change(mmc, 0);
721}
722
723static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
724{
725 struct sh_mmcif_host *host = dev_id;
726 u32 state = 0;
727 int err = 0;
728
487d9fc5 729 state = sh_mmcif_readl(host->addr, MMCIF_CE_INT);
fdc50a94
YG		 730
731 if (state & INT_RBSYE) {
487d9fc5
MD		 732 sh_mmcif_writel(host->addr, MMCIF_CE_INT,
733 ~(INT_RBSYE | INT_CRSPE));
fdc50a94
YG		 734 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE);
735 } else if (state & INT_CRSPE) {
487d9fc5 736 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE);
fdc50a94
YG		 737 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE);
738 } else if (state & INT_BUFREN) {
487d9fc5 739 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN);
fdc50a94
YG		 740 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN);
741 } else if (state & INT_BUFWEN) {
487d9fc5 742 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN);
fdc50a94
YG		 743 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN);
744 } else if (state & INT_CMD12DRE) {
487d9fc5 745 sh_mmcif_writel(host->addr, MMCIF_CE_INT,
fdc50a94
YG		 746 ~(INT_CMD12DRE | INT_CMD12RBE |
747 INT_CMD12CRE | INT_BUFRE));
748 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE);
749 } else if (state & INT_BUFRE) {
487d9fc5 750 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE);
fdc50a94
YG		 751 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE);
752 } else if (state & INT_DTRANE) {
487d9fc5 753 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_DTRANE);
fdc50a94
YG		 754 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE);
755 } else if (state & INT_CMD12RBE) {
487d9fc5 756 sh_mmcif_writel(host->addr, MMCIF_CE_INT,
fdc50a94
YG		 757 ~(INT_CMD12RBE | INT_CMD12CRE));
758 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE);
759 } else if (state & INT_ERR_STS) {
760 /* err interrupts */
487d9fc5 761 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
fdc50a94
YG		 762 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
763 err = 1;
764 } else {
765 pr_debug("%s: Not support int\n", DRIVER_NAME);
487d9fc5 766 sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
fdc50a94
YG		 767 sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
768 err = 1;
769 }
770 if (err) {
771 host->sd_error = 1;
772 pr_debug("%s: int err state = %08x\n", DRIVER_NAME, state);
773 }
774 host->wait_int = 1;
775 wake_up(&host->intr_wait);
776
777 return IRQ_HANDLED;
778}
779
780static int __devinit sh_mmcif_probe(struct platform_device *pdev)
781{
782 int ret = 0, irq[2];
783 struct mmc_host *mmc;
784 struct sh_mmcif_host *host = NULL;
785 struct sh_mmcif_plat_data *pd = NULL;
786 struct resource *res;
787 void __iomem *reg;
788 char clk_name[8];
789
790 irq[0] = platform_get_irq(pdev, 0);
791 irq[1] = platform_get_irq(pdev, 1);
792 if (irq[0] < 0 || irq[1] < 0) {
793 pr_err(DRIVER_NAME": Get irq error\n");
794 return -ENXIO;
795 }
796 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
797 if (!res) {
798 dev_err(&pdev->dev, "platform_get_resource error.\n");
799 return -ENXIO;
800 }
801 reg = ioremap(res->start, resource_size(res));
802 if (!reg) {
803 dev_err(&pdev->dev, "ioremap error.\n");
804 return -ENOMEM;
805 }
806 pd = (struct sh_mmcif_plat_data *)(pdev->dev.platform_data);
807 if (!pd) {
808 dev_err(&pdev->dev, "sh_mmcif plat data error.\n");
809 ret = -ENXIO;
810 goto clean_up;
811 }
812 mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev);
813 if (!mmc) {
814 ret = -ENOMEM;
815 goto clean_up;
816 }
817 host = mmc_priv(mmc);
818 host->mmc = mmc;
819 host->addr = reg;
820 host->timeout = 1000;
821
822 snprintf(clk_name, sizeof(clk_name), "mmc%d", pdev->id);
823 host->hclk = clk_get(&pdev->dev, clk_name);
824 if (IS_ERR(host->hclk)) {
825 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
826 ret = PTR_ERR(host->hclk);
827 goto clean_up1;
828 }
829 clk_enable(host->hclk);
830 host->clk = clk_get_rate(host->hclk);
831 host->pd = pdev;
832
833 init_waitqueue_head(&host->intr_wait);
834
835 mmc->ops = &sh_mmcif_ops;
836 mmc->f_max = host->clk;
837 /* close to 400KHz */
838 if (mmc->f_max < 51200000)
839 mmc->f_min = mmc->f_max / 128;
840 else if (mmc->f_max < 102400000)
841 mmc->f_min = mmc->f_max / 256;
842 else
843 mmc->f_min = mmc->f_max / 512;
844 if (pd->ocr)
845 mmc->ocr_avail = pd->ocr;
846 mmc->caps = MMC_CAP_MMC_HIGHSPEED;
847 if (pd->caps)
848 mmc->caps |= pd->caps;
a36274e0 849 mmc->max_segs = 128;
fdc50a94
YG		 850 mmc->max_blk_size = 512;
851 mmc->max_blk_count = 65535;
852 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
853 mmc->max_seg_size = mmc->max_req_size;
854
855 sh_mmcif_sync_reset(host);
856 platform_set_drvdata(pdev, host);
857 mmc_add_host(mmc);
858
859 ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
860 if (ret) {
861 pr_err(DRIVER_NAME": request_irq error (sh_mmc:error)\n");
862 goto clean_up2;
863 }
864 ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
865 if (ret) {
866 free_irq(irq[0], host);
867 pr_err(DRIVER_NAME": request_irq error (sh_mmc:int)\n");
868 goto clean_up2;
869 }
870
487d9fc5 871 sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
fdc50a94
YG		 872 sh_mmcif_detect(host->mmc);
873
874 pr_info("%s: driver version %s\n", DRIVER_NAME, DRIVER_VERSION);
875 pr_debug("%s: chip ver H'%04x\n", DRIVER_NAME,
487d9fc5 876 sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
fdc50a94
YG		 877 return ret;
878
879clean_up2:
880 clk_disable(host->hclk);
881clean_up1:
882 mmc_free_host(mmc);
883clean_up:
884 if (reg)
885 iounmap(reg);
886 return ret;
887}
888
889static int __devexit sh_mmcif_remove(struct platform_device *pdev)
890{
891 struct sh_mmcif_host *host = platform_get_drvdata(pdev);
892 int irq[2];
893
487d9fc5 894 sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
fdc50a94
YG		 895
896 irq[0] = platform_get_irq(pdev, 0);
897 irq[1] = platform_get_irq(pdev, 1);
898
899 if (host->addr)
900 iounmap(host->addr);
901
902 platform_set_drvdata(pdev, NULL);
903 mmc_remove_host(host->mmc);
904
905 free_irq(irq[0], host);
906 free_irq(irq[1], host);
907
908 clk_disable(host->hclk);
909 mmc_free_host(host->mmc);
910
911 return 0;
912}
913
914static struct platform_driver sh_mmcif_driver = {
915 .probe = sh_mmcif_probe,
916 .remove = sh_mmcif_remove,
917 .driver = {
918 .name = DRIVER_NAME,
919 },
920};
921
922static int __init sh_mmcif_init(void)
923{
924 return platform_driver_register(&sh_mmcif_driver);
925}
926
927static void __exit sh_mmcif_exit(void)
928{
929 platform_driver_unregister(&sh_mmcif_driver);
930}
931
932module_init(sh_mmcif_init);
933module_exit(sh_mmcif_exit);
934
935
936MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver");
937MODULE_LICENSE("GPL");
938MODULE_ALIAS(DRIVER_NAME);
939MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>");
Clone of davem's net-next-2.6 tree