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4020f2d7 AD |
1 | /* |
2 | * tifm_sd.c - TI FlashMedia driver | |
3 | * | |
4 | * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
91f8d011 AD |
10 | * Special thanks to Brad Campbell for extensive testing of this driver. |
11 | * | |
4020f2d7 AD |
12 | */ |
13 | ||
14 | ||
15 | #include <linux/tifm.h> | |
4020f2d7 AD |
16 | #include <linux/mmc/host.h> |
17 | #include <linux/highmem.h> | |
13cdf48e | 18 | #include <linux/scatterlist.h> |
2099c99e | 19 | #include <asm/io.h> |
4020f2d7 AD |
20 | |
21 | #define DRIVER_NAME "tifm_sd" | |
4552f0cb | 22 | #define DRIVER_VERSION "0.8" |
4020f2d7 AD |
23 | |
24 | static int no_dma = 0; | |
25 | static int fixed_timeout = 0; | |
26 | module_param(no_dma, bool, 0644); | |
27 | module_param(fixed_timeout, bool, 0644); | |
28 | ||
29 | /* Constants here are mostly from OMAP5912 datasheet */ | |
30 | #define TIFM_MMCSD_RESET 0x0002 | |
31 | #define TIFM_MMCSD_CLKMASK 0x03ff | |
32 | #define TIFM_MMCSD_POWER 0x0800 | |
33 | #define TIFM_MMCSD_4BBUS 0x8000 | |
34 | #define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */ | |
35 | #define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */ | |
36 | #define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */ | |
37 | #define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */ | |
38 | #define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */ | |
39 | #define TIFM_MMCSD_READ 0x8000 | |
40 | ||
12c83452 | 41 | #define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */ |
4020f2d7 | 42 | #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ |
91f8d011 | 43 | #define TIFM_MMCSD_CD 0x0002 /* card detect */ |
4020f2d7 AD |
44 | #define TIFM_MMCSD_CB 0x0004 /* card enter busy state */ |
45 | #define TIFM_MMCSD_BRS 0x0008 /* block received/sent */ | |
46 | #define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */ | |
47 | #define TIFM_MMCSD_DTO 0x0020 /* data time-out */ | |
48 | #define TIFM_MMCSD_DCRC 0x0040 /* data crc error */ | |
49 | #define TIFM_MMCSD_CTO 0x0080 /* command time-out */ | |
50 | #define TIFM_MMCSD_CCRC 0x0100 /* command crc error */ | |
51 | #define TIFM_MMCSD_AF 0x0400 /* fifo almost full */ | |
52 | #define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */ | |
91f8d011 AD |
53 | #define TIFM_MMCSD_OCRB 0x1000 /* OCR busy */ |
54 | #define TIFM_MMCSD_CIRQ 0x2000 /* card irq (cmd40/sdio) */ | |
4020f2d7 AD |
55 | #define TIFM_MMCSD_CERR 0x4000 /* card status error */ |
56 | ||
0007d483 AD |
57 | #define TIFM_MMCSD_ODTO 0x0040 /* open drain / extended timeout */ |
58 | #define TIFM_MMCSD_CARD_RO 0x0200 /* card is read-only */ | |
59 | ||
4020f2d7 AD |
60 | #define TIFM_MMCSD_FIFO_SIZE 0x0020 |
61 | ||
62 | #define TIFM_MMCSD_RSP_R0 0x0000 | |
63 | #define TIFM_MMCSD_RSP_R1 0x0100 | |
64 | #define TIFM_MMCSD_RSP_R2 0x0200 | |
65 | #define TIFM_MMCSD_RSP_R3 0x0300 | |
66 | #define TIFM_MMCSD_RSP_R4 0x0400 | |
67 | #define TIFM_MMCSD_RSP_R5 0x0500 | |
68 | #define TIFM_MMCSD_RSP_R6 0x0600 | |
69 | ||
70 | #define TIFM_MMCSD_RSP_BUSY 0x0800 | |
71 | ||
72 | #define TIFM_MMCSD_CMD_BC 0x0000 | |
73 | #define TIFM_MMCSD_CMD_BCR 0x1000 | |
74 | #define TIFM_MMCSD_CMD_AC 0x2000 | |
75 | #define TIFM_MMCSD_CMD_ADTC 0x3000 | |
76 | ||
13cdf48e AD |
77 | #define TIFM_MMCSD_MAX_BLOCK_SIZE 0x0800UL |
78 | ||
4020f2d7 | 79 | enum { |
72dc9d96 AD |
80 | CMD_READY = 0x0001, |
81 | FIFO_READY = 0x0002, | |
82 | BRS_READY = 0x0004, | |
83 | SCMD_ACTIVE = 0x0008, | |
84 | SCMD_READY = 0x0010, | |
85 | CARD_BUSY = 0x0020, | |
86 | DATA_CARRY = 0x0040 | |
0007d483 | 87 | }; |
4020f2d7 AD |
88 | |
89 | struct tifm_sd { | |
91f8d011 | 90 | struct tifm_dev *dev; |
4020f2d7 | 91 | |
91f8d011 AD |
92 | unsigned short eject:1, |
93 | open_drain:1, | |
94 | no_dma:1; | |
95 | unsigned short cmd_flags; | |
72dc9d96 | 96 | |
91f8d011 AD |
97 | unsigned int clk_freq; |
98 | unsigned int clk_div; | |
99 | unsigned long timeout_jiffies; | |
4020f2d7 | 100 | |
8e02f858 | 101 | struct tasklet_struct finish_tasklet; |
0803dd0c | 102 | struct timer_list timer; |
4020f2d7 | 103 | struct mmc_request *req; |
4020f2d7 | 104 | |
13cdf48e AD |
105 | int sg_len; |
106 | int sg_pos; | |
107 | unsigned int block_pos; | |
108 | struct scatterlist bounce_buf; | |
109 | unsigned char bounce_buf_data[TIFM_MMCSD_MAX_BLOCK_SIZE]; | |
4020f2d7 AD |
110 | }; |
111 | ||
13cdf48e AD |
112 | /* for some reason, host won't respond correctly to readw/writew */ |
113 | static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg, | |
114 | unsigned int off, unsigned int cnt) | |
255ef22e | 115 | { |
13cdf48e AD |
116 | struct tifm_dev *sock = host->dev; |
117 | unsigned char *buf; | |
118 | unsigned int pos = 0, val; | |
119 | ||
120 | buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + off; | |
121 | if (host->cmd_flags & DATA_CARRY) { | |
122 | buf[pos++] = host->bounce_buf_data[0]; | |
123 | host->cmd_flags &= ~DATA_CARRY; | |
124 | } | |
125 | ||
126 | while (pos < cnt) { | |
127 | val = readl(sock->addr + SOCK_MMCSD_DATA); | |
128 | buf[pos++] = val & 0xff; | |
129 | if (pos == cnt) { | |
130 | host->bounce_buf_data[0] = (val >> 8) & 0xff; | |
131 | host->cmd_flags |= DATA_CARRY; | |
132 | break; | |
133 | } | |
134 | buf[pos++] = (val >> 8) & 0xff; | |
135 | } | |
136 | kunmap_atomic(buf - off, KM_BIO_DST_IRQ); | |
255ef22e AD |
137 | } |
138 | ||
13cdf48e AD |
139 | static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg, |
140 | unsigned int off, unsigned int cnt) | |
4020f2d7 | 141 | { |
13cdf48e AD |
142 | struct tifm_dev *sock = host->dev; |
143 | unsigned char *buf; | |
144 | unsigned int pos = 0, val; | |
145 | ||
146 | buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + off; | |
147 | if (host->cmd_flags & DATA_CARRY) { | |
148 | val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00); | |
149 | writel(val, sock->addr + SOCK_MMCSD_DATA); | |
150 | host->cmd_flags &= ~DATA_CARRY; | |
151 | } | |
152 | ||
153 | while (pos < cnt) { | |
154 | val = buf[pos++]; | |
155 | if (pos == cnt) { | |
156 | host->bounce_buf_data[0] = val & 0xff; | |
157 | host->cmd_flags |= DATA_CARRY; | |
158 | break; | |
4020f2d7 | 159 | } |
13cdf48e AD |
160 | val |= (buf[pos++] << 8) & 0xff00; |
161 | writel(val, sock->addr + SOCK_MMCSD_DATA); | |
162 | } | |
163 | kunmap_atomic(buf - off, KM_BIO_SRC_IRQ); | |
164 | } | |
165 | ||
166 | static void tifm_sd_transfer_data(struct tifm_sd *host) | |
167 | { | |
168 | struct mmc_data *r_data = host->req->cmd->data; | |
169 | struct scatterlist *sg = r_data->sg; | |
170 | unsigned int off, cnt, t_size = TIFM_MMCSD_FIFO_SIZE * 2; | |
171 | unsigned int p_off, p_cnt; | |
172 | struct page *pg; | |
173 | ||
174 | if (host->sg_pos == host->sg_len) | |
175 | return; | |
176 | while (t_size) { | |
177 | cnt = sg[host->sg_pos].length - host->block_pos; | |
178 | if (!cnt) { | |
179 | host->block_pos = 0; | |
180 | host->sg_pos++; | |
181 | if (host->sg_pos == host->sg_len) { | |
182 | if ((r_data->flags & MMC_DATA_WRITE) | |
183 | && DATA_CARRY) | |
184 | writel(host->bounce_buf_data[0], | |
185 | host->dev->addr | |
186 | + SOCK_MMCSD_DATA); | |
187 | ||
188 | return; | |
4020f2d7 | 189 | } |
13cdf48e | 190 | cnt = sg[host->sg_pos].length; |
4020f2d7 | 191 | } |
13cdf48e AD |
192 | off = sg[host->sg_pos].offset + host->block_pos; |
193 | ||
45711f1a | 194 | pg = nth_page(sg_page(&sg[host->sg_pos]), off >> PAGE_SHIFT); |
13cdf48e AD |
195 | p_off = offset_in_page(off); |
196 | p_cnt = PAGE_SIZE - p_off; | |
197 | p_cnt = min(p_cnt, cnt); | |
198 | p_cnt = min(p_cnt, t_size); | |
199 | ||
200 | if (r_data->flags & MMC_DATA_READ) | |
201 | tifm_sd_read_fifo(host, pg, p_off, p_cnt); | |
202 | else if (r_data->flags & MMC_DATA_WRITE) | |
203 | tifm_sd_write_fifo(host, pg, p_off, p_cnt); | |
204 | ||
205 | t_size -= p_cnt; | |
206 | host->block_pos += p_cnt; | |
4020f2d7 | 207 | } |
13cdf48e AD |
208 | } |
209 | ||
210 | static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off, | |
211 | struct page *src, unsigned int src_off, | |
212 | unsigned int count) | |
213 | { | |
214 | unsigned char *src_buf = kmap_atomic(src, KM_BIO_SRC_IRQ) + src_off; | |
215 | unsigned char *dst_buf = kmap_atomic(dst, KM_BIO_DST_IRQ) + dst_off; | |
216 | ||
217 | memcpy(dst_buf, src_buf, count); | |
218 | ||
219 | kunmap_atomic(dst_buf - dst_off, KM_BIO_DST_IRQ); | |
220 | kunmap_atomic(src_buf - src_off, KM_BIO_SRC_IRQ); | |
221 | } | |
222 | ||
223 | static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data) | |
224 | { | |
225 | struct scatterlist *sg = r_data->sg; | |
226 | unsigned int t_size = r_data->blksz; | |
227 | unsigned int off, cnt; | |
228 | unsigned int p_off, p_cnt; | |
229 | struct page *pg; | |
230 | ||
231 | dev_dbg(&host->dev->dev, "bouncing block\n"); | |
232 | while (t_size) { | |
233 | cnt = sg[host->sg_pos].length - host->block_pos; | |
234 | if (!cnt) { | |
235 | host->block_pos = 0; | |
236 | host->sg_pos++; | |
237 | if (host->sg_pos == host->sg_len) | |
238 | return; | |
239 | cnt = sg[host->sg_pos].length; | |
240 | } | |
241 | off = sg[host->sg_pos].offset + host->block_pos; | |
242 | ||
45711f1a | 243 | pg = nth_page(sg_page(&sg[host->sg_pos]), off >> PAGE_SHIFT); |
13cdf48e AD |
244 | p_off = offset_in_page(off); |
245 | p_cnt = PAGE_SIZE - p_off; | |
246 | p_cnt = min(p_cnt, cnt); | |
247 | p_cnt = min(p_cnt, t_size); | |
248 | ||
249 | if (r_data->flags & MMC_DATA_WRITE) | |
45711f1a | 250 | tifm_sd_copy_page(sg_page(&host->bounce_buf), |
13cdf48e AD |
251 | r_data->blksz - t_size, |
252 | pg, p_off, p_cnt); | |
253 | else if (r_data->flags & MMC_DATA_READ) | |
45711f1a | 254 | tifm_sd_copy_page(pg, p_off, sg_page(&host->bounce_buf), |
13cdf48e AD |
255 | r_data->blksz - t_size, p_cnt); |
256 | ||
257 | t_size -= p_cnt; | |
258 | host->block_pos += p_cnt; | |
259 | } | |
260 | } | |
261 | ||
d97956f8 | 262 | static int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data) |
13cdf48e AD |
263 | { |
264 | struct tifm_dev *sock = host->dev; | |
265 | unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz; | |
266 | unsigned int dma_len, dma_blk_cnt, dma_off; | |
267 | struct scatterlist *sg = NULL; | |
268 | unsigned long flags; | |
269 | ||
270 | if (host->sg_pos == host->sg_len) | |
271 | return 1; | |
272 | ||
273 | if (host->cmd_flags & DATA_CARRY) { | |
274 | host->cmd_flags &= ~DATA_CARRY; | |
275 | local_irq_save(flags); | |
276 | tifm_sd_bounce_block(host, r_data); | |
277 | local_irq_restore(flags); | |
278 | if (host->sg_pos == host->sg_len) | |
279 | return 1; | |
280 | } | |
281 | ||
282 | dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos; | |
283 | if (!dma_len) { | |
284 | host->block_pos = 0; | |
285 | host->sg_pos++; | |
286 | if (host->sg_pos == host->sg_len) | |
287 | return 1; | |
288 | dma_len = sg_dma_len(&r_data->sg[host->sg_pos]); | |
289 | } | |
290 | ||
291 | if (dma_len < t_size) { | |
292 | dma_blk_cnt = dma_len / r_data->blksz; | |
293 | dma_off = host->block_pos; | |
294 | host->block_pos += dma_blk_cnt * r_data->blksz; | |
295 | } else { | |
296 | dma_blk_cnt = TIFM_DMA_TSIZE; | |
297 | dma_off = host->block_pos; | |
298 | host->block_pos += t_size; | |
299 | } | |
300 | ||
301 | if (dma_blk_cnt) | |
302 | sg = &r_data->sg[host->sg_pos]; | |
303 | else if (dma_len) { | |
304 | if (r_data->flags & MMC_DATA_WRITE) { | |
305 | local_irq_save(flags); | |
306 | tifm_sd_bounce_block(host, r_data); | |
307 | local_irq_restore(flags); | |
308 | } else | |
309 | host->cmd_flags |= DATA_CARRY; | |
310 | ||
311 | sg = &host->bounce_buf; | |
312 | dma_off = 0; | |
313 | dma_blk_cnt = 1; | |
314 | } else | |
315 | return 1; | |
316 | ||
317 | dev_dbg(&sock->dev, "setting dma for %d blocks\n", dma_blk_cnt); | |
318 | writel(sg_dma_address(sg) + dma_off, sock->addr + SOCK_DMA_ADDRESS); | |
319 | if (r_data->flags & MMC_DATA_WRITE) | |
320 | writel((dma_blk_cnt << 8) | TIFM_DMA_TX | TIFM_DMA_EN, | |
321 | sock->addr + SOCK_DMA_CONTROL); | |
322 | else | |
323 | writel((dma_blk_cnt << 8) | TIFM_DMA_EN, | |
324 | sock->addr + SOCK_DMA_CONTROL); | |
325 | ||
4020f2d7 AD |
326 | return 0; |
327 | } | |
328 | ||
329 | static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) | |
330 | { | |
331 | unsigned int rc = 0; | |
332 | ||
333 | switch (mmc_resp_type(cmd)) { | |
334 | case MMC_RSP_NONE: | |
335 | rc |= TIFM_MMCSD_RSP_R0; | |
336 | break; | |
337 | case MMC_RSP_R1B: | |
338 | rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through | |
339 | case MMC_RSP_R1: | |
340 | rc |= TIFM_MMCSD_RSP_R1; | |
341 | break; | |
342 | case MMC_RSP_R2: | |
343 | rc |= TIFM_MMCSD_RSP_R2; | |
344 | break; | |
345 | case MMC_RSP_R3: | |
346 | rc |= TIFM_MMCSD_RSP_R3; | |
347 | break; | |
4020f2d7 AD |
348 | default: |
349 | BUG(); | |
350 | } | |
351 | ||
352 | switch (mmc_cmd_type(cmd)) { | |
353 | case MMC_CMD_BC: | |
354 | rc |= TIFM_MMCSD_CMD_BC; | |
355 | break; | |
356 | case MMC_CMD_BCR: | |
357 | rc |= TIFM_MMCSD_CMD_BCR; | |
358 | break; | |
359 | case MMC_CMD_AC: | |
360 | rc |= TIFM_MMCSD_CMD_AC; | |
361 | break; | |
362 | case MMC_CMD_ADTC: | |
363 | rc |= TIFM_MMCSD_CMD_ADTC; | |
364 | break; | |
365 | default: | |
366 | BUG(); | |
367 | } | |
368 | return rc; | |
369 | } | |
370 | ||
371 | static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) | |
372 | { | |
373 | struct tifm_dev *sock = host->dev; | |
0007d483 AD |
374 | unsigned int cmd_mask = tifm_sd_op_flags(cmd); |
375 | ||
376 | if (host->open_drain) | |
377 | cmd_mask |= TIFM_MMCSD_ODTO; | |
4020f2d7 AD |
378 | |
379 | if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) | |
380 | cmd_mask |= TIFM_MMCSD_READ; | |
381 | ||
382 | dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", | |
2e8ce5e7 | 383 | cmd->opcode, cmd->arg, cmd_mask); |
4020f2d7 AD |
384 | |
385 | writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); | |
386 | writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); | |
387 | writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); | |
388 | } | |
389 | ||
390 | static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) | |
391 | { | |
392 | cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) | |
393 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); | |
394 | cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) | |
395 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); | |
396 | cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) | |
397 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); | |
398 | cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) | |
399 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); | |
400 | } | |
401 | ||
72dc9d96 | 402 | static void tifm_sd_check_status(struct tifm_sd *host) |
4020f2d7 | 403 | { |
72dc9d96 | 404 | struct tifm_dev *sock = host->dev; |
4020f2d7 AD |
405 | struct mmc_command *cmd = host->req->cmd; |
406 | ||
17b0429d | 407 | if (cmd->error) |
72dc9d96 AD |
408 | goto finish_request; |
409 | ||
410 | if (!(host->cmd_flags & CMD_READY)) | |
4020f2d7 | 411 | return; |
72dc9d96 AD |
412 | |
413 | if (cmd->data) { | |
17b0429d | 414 | if (cmd->data->error) { |
72dc9d96 AD |
415 | if ((host->cmd_flags & SCMD_ACTIVE) |
416 | && !(host->cmd_flags & SCMD_READY)) | |
417 | return; | |
418 | ||
419 | goto finish_request; | |
4020f2d7 | 420 | } |
72dc9d96 AD |
421 | |
422 | if (!(host->cmd_flags & BRS_READY)) | |
423 | return; | |
424 | ||
425 | if (!(host->no_dma || (host->cmd_flags & FIFO_READY))) | |
426 | return; | |
427 | ||
428 | if (cmd->data->flags & MMC_DATA_WRITE) { | |
429 | if (host->req->stop) { | |
430 | if (!(host->cmd_flags & SCMD_ACTIVE)) { | |
431 | host->cmd_flags |= SCMD_ACTIVE; | |
432 | writel(TIFM_MMCSD_EOFB | |
433 | | readl(sock->addr | |
434 | + SOCK_MMCSD_INT_ENABLE), | |
435 | sock->addr | |
436 | + SOCK_MMCSD_INT_ENABLE); | |
1289335a | 437 | tifm_sd_exec(host, host->req->stop); |
72dc9d96 | 438 | return; |
1289335a | 439 | } else { |
72dc9d96 AD |
440 | if (!(host->cmd_flags & SCMD_READY) |
441 | || (host->cmd_flags & CARD_BUSY)) | |
442 | return; | |
443 | writel((~TIFM_MMCSD_EOFB) | |
444 | & readl(sock->addr | |
445 | + SOCK_MMCSD_INT_ENABLE), | |
446 | sock->addr | |
447 | + SOCK_MMCSD_INT_ENABLE); | |
1289335a AD |
448 | } |
449 | } else { | |
72dc9d96 AD |
450 | if (host->cmd_flags & CARD_BUSY) |
451 | return; | |
452 | writel((~TIFM_MMCSD_EOFB) | |
453 | & readl(sock->addr | |
454 | + SOCK_MMCSD_INT_ENABLE), | |
455 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
1289335a | 456 | } |
72dc9d96 | 457 | } else { |
1289335a | 458 | if (host->req->stop) { |
72dc9d96 AD |
459 | if (!(host->cmd_flags & SCMD_ACTIVE)) { |
460 | host->cmd_flags |= SCMD_ACTIVE; | |
461 | tifm_sd_exec(host, host->req->stop); | |
462 | return; | |
463 | } else { | |
464 | if (!(host->cmd_flags & SCMD_READY)) | |
465 | return; | |
466 | } | |
1289335a | 467 | } |
4020f2d7 | 468 | } |
4020f2d7 | 469 | } |
72dc9d96 AD |
470 | finish_request: |
471 | tasklet_schedule(&host->finish_tasklet); | |
4020f2d7 AD |
472 | } |
473 | ||
474 | /* Called from interrupt handler */ | |
4552f0cb | 475 | static void tifm_sd_data_event(struct tifm_dev *sock) |
4020f2d7 AD |
476 | { |
477 | struct tifm_sd *host; | |
4552f0cb | 478 | unsigned int fifo_status = 0; |
72dc9d96 | 479 | struct mmc_data *r_data = NULL; |
4020f2d7 AD |
480 | |
481 | spin_lock(&sock->lock); | |
482 | host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); | |
4552f0cb | 483 | fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); |
72dc9d96 AD |
484 | dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n", |
485 | fifo_status, host->cmd_flags); | |
4552f0cb | 486 | |
72dc9d96 AD |
487 | if (host->req) { |
488 | r_data = host->req->cmd->data; | |
4552f0cb | 489 | |
72dc9d96 | 490 | if (r_data && (fifo_status & TIFM_FIFO_READY)) { |
13cdf48e AD |
491 | if (tifm_sd_set_dma_data(host, r_data)) { |
492 | host->cmd_flags |= FIFO_READY; | |
493 | tifm_sd_check_status(host); | |
494 | } | |
72dc9d96 AD |
495 | } |
496 | } | |
4552f0cb | 497 | |
72dc9d96 | 498 | writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); |
4552f0cb | 499 | spin_unlock(&sock->lock); |
4552f0cb AD |
500 | } |
501 | ||
502 | /* Called from interrupt handler */ | |
503 | static void tifm_sd_card_event(struct tifm_dev *sock) | |
504 | { | |
505 | struct tifm_sd *host; | |
506 | unsigned int host_status = 0; | |
17b0429d | 507 | int cmd_error = 0; |
72dc9d96 AD |
508 | struct mmc_command *cmd = NULL; |
509 | unsigned long flags; | |
4552f0cb AD |
510 | |
511 | spin_lock(&sock->lock); | |
512 | host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); | |
72dc9d96 AD |
513 | host_status = readl(sock->addr + SOCK_MMCSD_STATUS); |
514 | dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n", | |
515 | host_status, host->cmd_flags); | |
4020f2d7 | 516 | |
72dc9d96 AD |
517 | if (host->req) { |
518 | cmd = host->req->cmd; | |
4020f2d7 AD |
519 | |
520 | if (host_status & TIFM_MMCSD_ERRMASK) { | |
72dc9d96 AD |
521 | writel(host_status & TIFM_MMCSD_ERRMASK, |
522 | sock->addr + SOCK_MMCSD_STATUS); | |
523 | if (host_status & TIFM_MMCSD_CTO) | |
17b0429d | 524 | cmd_error = -ETIMEDOUT; |
72dc9d96 | 525 | else if (host_status & TIFM_MMCSD_CCRC) |
17b0429d | 526 | cmd_error = -EILSEQ; |
72dc9d96 AD |
527 | |
528 | if (cmd->data) { | |
529 | if (host_status & TIFM_MMCSD_DTO) | |
17b0429d | 530 | cmd->data->error = -ETIMEDOUT; |
72dc9d96 | 531 | else if (host_status & TIFM_MMCSD_DCRC) |
17b0429d | 532 | cmd->data->error = -EILSEQ; |
72dc9d96 | 533 | } |
4020f2d7 AD |
534 | |
535 | writel(TIFM_FIFO_INT_SETALL, | |
536 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
537 | writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); | |
538 | ||
539 | if (host->req->stop) { | |
72dc9d96 AD |
540 | if (host->cmd_flags & SCMD_ACTIVE) { |
541 | host->req->stop->error = cmd_error; | |
542 | host->cmd_flags |= SCMD_READY; | |
543 | } else { | |
544 | cmd->error = cmd_error; | |
545 | host->cmd_flags |= SCMD_ACTIVE; | |
4020f2d7 | 546 | tifm_sd_exec(host, host->req->stop); |
4020f2d7 | 547 | goto done; |
4020f2d7 | 548 | } |
72dc9d96 AD |
549 | } else |
550 | cmd->error = cmd_error; | |
551 | } else { | |
552 | if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) { | |
553 | if (!(host->cmd_flags & CMD_READY)) { | |
554 | host->cmd_flags |= CMD_READY; | |
555 | tifm_sd_fetch_resp(cmd, sock); | |
556 | } else if (host->cmd_flags & SCMD_ACTIVE) { | |
557 | host->cmd_flags |= SCMD_READY; | |
558 | tifm_sd_fetch_resp(host->req->stop, | |
559 | sock); | |
560 | } | |
4020f2d7 | 561 | } |
72dc9d96 AD |
562 | if (host_status & TIFM_MMCSD_BRS) |
563 | host->cmd_flags |= BRS_READY; | |
4020f2d7 AD |
564 | } |
565 | ||
72dc9d96 AD |
566 | if (host->no_dma && cmd->data) { |
567 | if (host_status & TIFM_MMCSD_AE) | |
568 | writel(host_status & TIFM_MMCSD_AE, | |
569 | sock->addr + SOCK_MMCSD_STATUS); | |
570 | ||
571 | if (host_status & (TIFM_MMCSD_AE | TIFM_MMCSD_AF | |
572 | | TIFM_MMCSD_BRS)) { | |
573 | local_irq_save(flags); | |
13cdf48e | 574 | tifm_sd_transfer_data(host); |
72dc9d96 AD |
575 | local_irq_restore(flags); |
576 | host_status &= ~TIFM_MMCSD_AE; | |
577 | } | |
4020f2d7 | 578 | } |
4020f2d7 | 579 | |
72dc9d96 AD |
580 | if (host_status & TIFM_MMCSD_EOFB) |
581 | host->cmd_flags &= ~CARD_BUSY; | |
582 | else if (host_status & TIFM_MMCSD_CB) | |
583 | host->cmd_flags |= CARD_BUSY; | |
584 | ||
585 | tifm_sd_check_status(host); | |
586 | } | |
4020f2d7 | 587 | done: |
72dc9d96 | 588 | writel(host_status, sock->addr + SOCK_MMCSD_STATUS); |
4020f2d7 | 589 | spin_unlock(&sock->lock); |
4020f2d7 AD |
590 | } |
591 | ||
4020f2d7 | 592 | static void tifm_sd_set_data_timeout(struct tifm_sd *host, |
2e8ce5e7 | 593 | struct mmc_data *data) |
4020f2d7 AD |
594 | { |
595 | struct tifm_dev *sock = host->dev; | |
596 | unsigned int data_timeout = data->timeout_clks; | |
597 | ||
598 | if (fixed_timeout) | |
599 | return; | |
600 | ||
601 | data_timeout += data->timeout_ns / | |
83d420ba | 602 | ((1000000000UL / host->clk_freq) * host->clk_div); |
4020f2d7 AD |
603 | |
604 | if (data_timeout < 0xffff) { | |
4020f2d7 | 605 | writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); |
83d420ba AD |
606 | writel((~TIFM_MMCSD_DPE) |
607 | & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), | |
608 | sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); | |
4020f2d7 | 609 | } else { |
4020f2d7 | 610 | data_timeout = (data_timeout >> 10) + 1; |
2e8ce5e7 | 611 | if (data_timeout > 0xffff) |
4020f2d7 AD |
612 | data_timeout = 0; /* set to unlimited */ |
613 | writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); | |
83d420ba AD |
614 | writel(TIFM_MMCSD_DPE |
615 | | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), | |
616 | sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); | |
4020f2d7 AD |
617 | } |
618 | } | |
619 | ||
620 | static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
621 | { | |
622 | struct tifm_sd *host = mmc_priv(mmc); | |
623 | struct tifm_dev *sock = host->dev; | |
624 | unsigned long flags; | |
4020f2d7 AD |
625 | struct mmc_data *r_data = mrq->cmd->data; |
626 | ||
627 | spin_lock_irqsave(&sock->lock, flags); | |
0007d483 | 628 | if (host->eject) { |
255d01af | 629 | mrq->cmd->error = -ENOMEDIUM; |
4020f2d7 AD |
630 | goto err_out; |
631 | } | |
632 | ||
633 | if (host->req) { | |
91f8d011 AD |
634 | printk(KERN_ERR "%s : unfinished request detected\n", |
635 | sock->dev.bus_id); | |
255d01af PO |
636 | mrq->cmd->error = -ETIMEDOUT; |
637 | goto err_out; | |
638 | } | |
639 | ||
13cdf48e AD |
640 | host->cmd_flags = 0; |
641 | host->block_pos = 0; | |
642 | host->sg_pos = 0; | |
643 | ||
b37a0506 AD |
644 | if (mrq->data && !is_power_of_2(mrq->data->blksz)) |
645 | host->no_dma = 1; | |
646 | else | |
647 | host->no_dma = no_dma ? 1 : 0; | |
648 | ||
4020f2d7 AD |
649 | if (r_data) { |
650 | tifm_sd_set_data_timeout(host, r_data); | |
651 | ||
13cdf48e AD |
652 | if ((r_data->flags & MMC_DATA_WRITE) && !mrq->stop) |
653 | writel(TIFM_MMCSD_EOFB | |
654 | | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
655 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
dfef26d9 | 656 | |
13cdf48e | 657 | if (host->no_dma) { |
dfef26d9 AD |
658 | writel(TIFM_MMCSD_BUFINT |
659 | | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
660 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
661 | writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) | |
662 | | (TIFM_MMCSD_FIFO_SIZE - 1), | |
663 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
664 | ||
13cdf48e | 665 | host->sg_len = r_data->sg_len; |
dfef26d9 | 666 | } else { |
13cdf48e AD |
667 | sg_init_one(&host->bounce_buf, host->bounce_buf_data, |
668 | r_data->blksz); | |
669 | ||
670 | if(1 != tifm_map_sg(sock, &host->bounce_buf, 1, | |
671 | r_data->flags & MMC_DATA_WRITE | |
672 | ? PCI_DMA_TODEVICE | |
673 | : PCI_DMA_FROMDEVICE)) { | |
674 | printk(KERN_ERR "%s : scatterlist map failed\n", | |
675 | sock->dev.bus_id); | |
b37a0506 | 676 | mrq->cmd->error = -ENOMEM; |
13cdf48e AD |
677 | goto err_out; |
678 | } | |
679 | host->sg_len = tifm_map_sg(sock, r_data->sg, | |
680 | r_data->sg_len, | |
681 | r_data->flags | |
682 | & MMC_DATA_WRITE | |
683 | ? PCI_DMA_TODEVICE | |
684 | : PCI_DMA_FROMDEVICE); | |
685 | if (host->sg_len < 1) { | |
686 | printk(KERN_ERR "%s : scatterlist map failed\n", | |
687 | sock->dev.bus_id); | |
688 | tifm_unmap_sg(sock, &host->bounce_buf, 1, | |
689 | r_data->flags & MMC_DATA_WRITE | |
690 | ? PCI_DMA_TODEVICE | |
691 | : PCI_DMA_FROMDEVICE); | |
b37a0506 | 692 | mrq->cmd->error = -ENOMEM; |
dfef26d9 AD |
693 | goto err_out; |
694 | } | |
4020f2d7 | 695 | |
13cdf48e AD |
696 | writel(TIFM_FIFO_INT_SETALL, |
697 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
698 | writel(ilog2(r_data->blksz) - 2, | |
699 | sock->addr + SOCK_FIFO_PAGE_SIZE); | |
700 | writel(TIFM_FIFO_ENABLE, | |
701 | sock->addr + SOCK_FIFO_CONTROL); | |
702 | writel(TIFM_FIFO_INTMASK, | |
703 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); | |
704 | ||
705 | if (r_data->flags & MMC_DATA_WRITE) | |
706 | writel(TIFM_MMCSD_TXDE, | |
707 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
708 | else | |
709 | writel(TIFM_MMCSD_RXDE, | |
710 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
711 | ||
712 | tifm_sd_set_dma_data(host, r_data); | |
dfef26d9 | 713 | } |
13cdf48e AD |
714 | |
715 | writel(r_data->blocks - 1, | |
716 | sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
717 | writel(r_data->blksz - 1, | |
718 | sock->addr + SOCK_MMCSD_BLOCK_LEN); | |
4020f2d7 AD |
719 | } |
720 | ||
721 | host->req = mrq; | |
0803dd0c | 722 | mod_timer(&host->timer, jiffies + host->timeout_jiffies); |
4020f2d7 | 723 | writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), |
2e8ce5e7 | 724 | sock->addr + SOCK_CONTROL); |
4020f2d7 AD |
725 | tifm_sd_exec(host, mrq->cmd); |
726 | spin_unlock_irqrestore(&sock->lock, flags); | |
727 | return; | |
728 | ||
729 | err_out: | |
255d01af | 730 | spin_unlock_irqrestore(&sock->lock, flags); |
4020f2d7 AD |
731 | mmc_request_done(mmc, mrq); |
732 | } | |
733 | ||
8e02f858 | 734 | static void tifm_sd_end_cmd(unsigned long data) |
4020f2d7 | 735 | { |
8e02f858 | 736 | struct tifm_sd *host = (struct tifm_sd*)data; |
4020f2d7 AD |
737 | struct tifm_dev *sock = host->dev; |
738 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
739 | struct mmc_request *mrq; | |
e069d79d | 740 | struct mmc_data *r_data = NULL; |
4020f2d7 AD |
741 | unsigned long flags; |
742 | ||
743 | spin_lock_irqsave(&sock->lock, flags); | |
744 | ||
0803dd0c | 745 | del_timer(&host->timer); |
4020f2d7 | 746 | mrq = host->req; |
e069d79d | 747 | host->req = NULL; |
4020f2d7 AD |
748 | |
749 | if (!mrq) { | |
91f8d011 AD |
750 | printk(KERN_ERR " %s : no request to complete?\n", |
751 | sock->dev.bus_id); | |
4020f2d7 AD |
752 | spin_unlock_irqrestore(&sock->lock, flags); |
753 | return; | |
754 | } | |
755 | ||
756 | r_data = mrq->cmd->data; | |
757 | if (r_data) { | |
dfef26d9 | 758 | if (host->no_dma) { |
13cdf48e AD |
759 | writel((~TIFM_MMCSD_BUFINT) |
760 | & readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
761 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
4020f2d7 | 762 | } else { |
13cdf48e AD |
763 | tifm_unmap_sg(sock, &host->bounce_buf, 1, |
764 | (r_data->flags & MMC_DATA_WRITE) | |
765 | ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
dfef26d9 AD |
766 | tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, |
767 | (r_data->flags & MMC_DATA_WRITE) | |
768 | ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
4020f2d7 | 769 | } |
13cdf48e AD |
770 | |
771 | r_data->bytes_xfered = r_data->blocks | |
772 | - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; | |
773 | r_data->bytes_xfered *= r_data->blksz; | |
774 | r_data->bytes_xfered += r_data->blksz | |
775 | - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; | |
4020f2d7 AD |
776 | } |
777 | ||
778 | writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), | |
2e8ce5e7 | 779 | sock->addr + SOCK_CONTROL); |
4020f2d7 AD |
780 | |
781 | spin_unlock_irqrestore(&sock->lock, flags); | |
4020f2d7 AD |
782 | mmc_request_done(mmc, mrq); |
783 | } | |
784 | ||
0803dd0c | 785 | static void tifm_sd_abort(unsigned long data) |
4020f2d7 | 786 | { |
8e02f858 AD |
787 | struct tifm_sd *host = (struct tifm_sd*)data; |
788 | ||
91f8d011 AD |
789 | printk(KERN_ERR |
790 | "%s : card failed to respond for a long period of time " | |
791 | "(%x, %x)\n", | |
792 | host->dev->dev.bus_id, host->req->cmd->opcode, host->cmd_flags); | |
8e02f858 | 793 | |
8e02f858 | 794 | tifm_eject(host->dev); |
4020f2d7 AD |
795 | } |
796 | ||
797 | static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
798 | { | |
799 | struct tifm_sd *host = mmc_priv(mmc); | |
800 | struct tifm_dev *sock = host->dev; | |
801 | unsigned int clk_div1, clk_div2; | |
802 | unsigned long flags; | |
803 | ||
804 | spin_lock_irqsave(&sock->lock, flags); | |
805 | ||
91f8d011 AD |
806 | dev_dbg(&sock->dev, "ios: clock = %u, vdd = %x, bus_mode = %x, " |
807 | "chip_select = %x, power_mode = %x, bus_width = %x\n", | |
808 | ios->clock, ios->vdd, ios->bus_mode, ios->chip_select, | |
809 | ios->power_mode, ios->bus_width); | |
810 | ||
4020f2d7 AD |
811 | if (ios->bus_width == MMC_BUS_WIDTH_4) { |
812 | writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), | |
813 | sock->addr + SOCK_MMCSD_CONFIG); | |
814 | } else { | |
2e8ce5e7 AD |
815 | writel((~TIFM_MMCSD_4BBUS) |
816 | & readl(sock->addr + SOCK_MMCSD_CONFIG), | |
817 | sock->addr + SOCK_MMCSD_CONFIG); | |
4020f2d7 AD |
818 | } |
819 | ||
820 | if (ios->clock) { | |
821 | clk_div1 = 20000000 / ios->clock; | |
822 | if (!clk_div1) | |
823 | clk_div1 = 1; | |
824 | ||
825 | clk_div2 = 24000000 / ios->clock; | |
826 | if (!clk_div2) | |
827 | clk_div2 = 1; | |
828 | ||
829 | if ((20000000 / clk_div1) > ios->clock) | |
830 | clk_div1++; | |
831 | if ((24000000 / clk_div2) > ios->clock) | |
832 | clk_div2++; | |
833 | if ((20000000 / clk_div1) > (24000000 / clk_div2)) { | |
834 | host->clk_freq = 20000000; | |
835 | host->clk_div = clk_div1; | |
2e8ce5e7 AD |
836 | writel((~TIFM_CTRL_FAST_CLK) |
837 | & readl(sock->addr + SOCK_CONTROL), | |
838 | sock->addr + SOCK_CONTROL); | |
4020f2d7 AD |
839 | } else { |
840 | host->clk_freq = 24000000; | |
841 | host->clk_div = clk_div2; | |
2e8ce5e7 AD |
842 | writel(TIFM_CTRL_FAST_CLK |
843 | | readl(sock->addr + SOCK_CONTROL), | |
844 | sock->addr + SOCK_CONTROL); | |
4020f2d7 AD |
845 | } |
846 | } else { | |
847 | host->clk_div = 0; | |
848 | } | |
849 | host->clk_div &= TIFM_MMCSD_CLKMASK; | |
2e8ce5e7 AD |
850 | writel(host->clk_div |
851 | | ((~TIFM_MMCSD_CLKMASK) | |
852 | & readl(sock->addr + SOCK_MMCSD_CONFIG)), | |
853 | sock->addr + SOCK_MMCSD_CONFIG); | |
4020f2d7 | 854 | |
0007d483 | 855 | host->open_drain = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN); |
4020f2d7 AD |
856 | |
857 | /* chip_select : maybe later */ | |
858 | //vdd | |
859 | //power is set before probe / after remove | |
4020f2d7 AD |
860 | |
861 | spin_unlock_irqrestore(&sock->lock, flags); | |
862 | } | |
863 | ||
864 | static int tifm_sd_ro(struct mmc_host *mmc) | |
865 | { | |
0007d483 | 866 | int rc = 0; |
4020f2d7 AD |
867 | struct tifm_sd *host = mmc_priv(mmc); |
868 | struct tifm_dev *sock = host->dev; | |
869 | unsigned long flags; | |
870 | ||
871 | spin_lock_irqsave(&sock->lock, flags); | |
0007d483 AD |
872 | if (TIFM_MMCSD_CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)) |
873 | rc = 1; | |
4020f2d7 AD |
874 | spin_unlock_irqrestore(&sock->lock, flags); |
875 | return rc; | |
876 | } | |
877 | ||
dfef26d9 | 878 | static const struct mmc_host_ops tifm_sd_ops = { |
4020f2d7 AD |
879 | .request = tifm_sd_request, |
880 | .set_ios = tifm_sd_ios, | |
881 | .get_ro = tifm_sd_ro | |
882 | }; | |
883 | ||
8e02f858 | 884 | static int tifm_sd_initialize_host(struct tifm_sd *host) |
4020f2d7 | 885 | { |
8e02f858 AD |
886 | int rc; |
887 | unsigned int host_status = 0; | |
4020f2d7 | 888 | struct tifm_dev *sock = host->dev; |
4020f2d7 | 889 | |
8e02f858 AD |
890 | writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); |
891 | mmiowb(); | |
892 | host->clk_div = 61; | |
893 | host->clk_freq = 20000000; | |
894 | writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); | |
895 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
896 | sock->addr + SOCK_MMCSD_CONFIG); | |
897 | ||
898 | /* wait up to 0.51 sec for reset */ | |
5897d657 | 899 | for (rc = 32; rc <= 256; rc <<= 1) { |
8e02f858 AD |
900 | if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { |
901 | rc = 0; | |
902 | break; | |
903 | } | |
904 | msleep(rc); | |
905 | } | |
906 | ||
907 | if (rc) { | |
5897d657 AD |
908 | printk(KERN_ERR "%s : controller failed to reset\n", |
909 | sock->dev.bus_id); | |
8e02f858 AD |
910 | return -ENODEV; |
911 | } | |
912 | ||
913 | writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
914 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
915 | sock->addr + SOCK_MMCSD_CONFIG); | |
916 | writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
917 | ||
918 | // command timeout fixed to 64 clocks for now | |
919 | writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); | |
920 | writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); | |
921 | ||
5897d657 | 922 | for (rc = 16; rc <= 64; rc <<= 1) { |
8e02f858 AD |
923 | host_status = readl(sock->addr + SOCK_MMCSD_STATUS); |
924 | writel(host_status, sock->addr + SOCK_MMCSD_STATUS); | |
925 | if (!(host_status & TIFM_MMCSD_ERRMASK) | |
926 | && (host_status & TIFM_MMCSD_EOC)) { | |
927 | rc = 0; | |
928 | break; | |
929 | } | |
930 | msleep(rc); | |
931 | } | |
932 | ||
933 | if (rc) { | |
5897d657 AD |
934 | printk(KERN_ERR |
935 | "%s : card not ready - probe failed on initialization\n", | |
936 | sock->dev.bus_id); | |
8e02f858 AD |
937 | return -ENODEV; |
938 | } | |
939 | ||
5897d657 AD |
940 | writel(TIFM_MMCSD_CERR | TIFM_MMCSD_BRS | TIFM_MMCSD_EOC |
941 | | TIFM_MMCSD_ERRMASK, | |
8e02f858 AD |
942 | sock->addr + SOCK_MMCSD_INT_ENABLE); |
943 | mmiowb(); | |
944 | ||
945 | return 0; | |
4020f2d7 AD |
946 | } |
947 | ||
948 | static int tifm_sd_probe(struct tifm_dev *sock) | |
949 | { | |
950 | struct mmc_host *mmc; | |
951 | struct tifm_sd *host; | |
952 | int rc = -EIO; | |
953 | ||
2e8ce5e7 AD |
954 | if (!(TIFM_SOCK_STATE_OCCUPIED |
955 | & readl(sock->addr + SOCK_PRESENT_STATE))) { | |
91f8d011 AD |
956 | printk(KERN_WARNING "%s : card gone, unexpectedly\n", |
957 | sock->dev.bus_id); | |
4020f2d7 AD |
958 | return rc; |
959 | } | |
960 | ||
961 | mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); | |
962 | if (!mmc) | |
963 | return -ENOMEM; | |
964 | ||
965 | host = mmc_priv(mmc); | |
4020f2d7 | 966 | tifm_set_drvdata(sock, mmc); |
8e02f858 | 967 | host->dev = sock; |
4020f2d7 AD |
968 | host->timeout_jiffies = msecs_to_jiffies(1000); |
969 | ||
dfef26d9 | 970 | tasklet_init(&host->finish_tasklet, tifm_sd_end_cmd, |
8e02f858 AD |
971 | (unsigned long)host); |
972 | setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host); | |
973 | ||
4020f2d7 AD |
974 | mmc->ops = &tifm_sd_ops; |
975 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
8e02f858 | 976 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE; |
4020f2d7 AD |
977 | mmc->f_min = 20000000 / 60; |
978 | mmc->f_max = 24000000; | |
13cdf48e AD |
979 | |
980 | mmc->max_blk_count = 2048; | |
981 | mmc->max_hw_segs = mmc->max_blk_count; | |
982 | mmc->max_blk_size = min(TIFM_MMCSD_MAX_BLOCK_SIZE, PAGE_SIZE); | |
983 | mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size; | |
984 | mmc->max_req_size = mmc->max_seg_size; | |
985 | mmc->max_phys_segs = mmc->max_hw_segs; | |
986 | ||
4552f0cb AD |
987 | sock->card_event = tifm_sd_card_event; |
988 | sock->data_event = tifm_sd_data_event; | |
8e02f858 | 989 | rc = tifm_sd_initialize_host(host); |
4020f2d7 | 990 | |
8e02f858 AD |
991 | if (!rc) |
992 | rc = mmc_add_host(mmc); | |
91f8d011 AD |
993 | if (!rc) |
994 | return 0; | |
4020f2d7 | 995 | |
8e02f858 | 996 | mmc_free_host(mmc); |
4020f2d7 AD |
997 | return rc; |
998 | } | |
999 | ||
1000 | static void tifm_sd_remove(struct tifm_dev *sock) | |
1001 | { | |
1002 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
1003 | struct tifm_sd *host = mmc_priv(mmc); | |
b039d4a1 | 1004 | unsigned long flags; |
4020f2d7 | 1005 | |
592d372a | 1006 | spin_lock_irqsave(&sock->lock, flags); |
0007d483 | 1007 | host->eject = 1; |
b039d4a1 AD |
1008 | writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); |
1009 | mmiowb(); | |
592d372a AD |
1010 | spin_unlock_irqrestore(&sock->lock, flags); |
1011 | ||
1012 | tasklet_kill(&host->finish_tasklet); | |
1013 | ||
b039d4a1 | 1014 | spin_lock_irqsave(&sock->lock, flags); |
b039d4a1 AD |
1015 | if (host->req) { |
1016 | writel(TIFM_FIFO_INT_SETALL, | |
1017 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
1018 | writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); | |
17b0429d | 1019 | host->req->cmd->error = -ENOMEDIUM; |
592d372a | 1020 | if (host->req->stop) |
17b0429d | 1021 | host->req->stop->error = -ENOMEDIUM; |
b039d4a1 AD |
1022 | tasklet_schedule(&host->finish_tasklet); |
1023 | } | |
1024 | spin_unlock_irqrestore(&sock->lock, flags); | |
8e02f858 | 1025 | mmc_remove_host(mmc); |
592d372a | 1026 | dev_dbg(&sock->dev, "after remove\n"); |
4020f2d7 | 1027 | |
4020f2d7 AD |
1028 | mmc_free_host(mmc); |
1029 | } | |
1030 | ||
dba4acca AD |
1031 | #ifdef CONFIG_PM |
1032 | ||
1033 | static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state) | |
1034 | { | |
055b8224 | 1035 | return mmc_suspend_host(tifm_get_drvdata(sock), state); |
dba4acca AD |
1036 | } |
1037 | ||
1038 | static int tifm_sd_resume(struct tifm_dev *sock) | |
1039 | { | |
1040 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
1041 | struct tifm_sd *host = mmc_priv(mmc); | |
5897d657 | 1042 | int rc; |
dba4acca | 1043 | |
5897d657 AD |
1044 | rc = tifm_sd_initialize_host(host); |
1045 | dev_dbg(&sock->dev, "resume initialize %d\n", rc); | |
1046 | ||
1047 | if (rc) | |
1048 | host->eject = 1; | |
1049 | else | |
1050 | rc = mmc_resume_host(mmc); | |
1051 | ||
1052 | return rc; | |
dba4acca AD |
1053 | } |
1054 | ||
1055 | #else | |
1056 | ||
1057 | #define tifm_sd_suspend NULL | |
1058 | #define tifm_sd_resume NULL | |
1059 | ||
1060 | #endif /* CONFIG_PM */ | |
1061 | ||
e23f2b8a AD |
1062 | static struct tifm_device_id tifm_sd_id_tbl[] = { |
1063 | { TIFM_TYPE_SD }, { } | |
4020f2d7 AD |
1064 | }; |
1065 | ||
1066 | static struct tifm_driver tifm_sd_driver = { | |
1067 | .driver = { | |
1068 | .name = DRIVER_NAME, | |
1069 | .owner = THIS_MODULE | |
1070 | }, | |
1071 | .id_table = tifm_sd_id_tbl, | |
1072 | .probe = tifm_sd_probe, | |
dba4acca AD |
1073 | .remove = tifm_sd_remove, |
1074 | .suspend = tifm_sd_suspend, | |
1075 | .resume = tifm_sd_resume | |
4020f2d7 AD |
1076 | }; |
1077 | ||
1078 | static int __init tifm_sd_init(void) | |
1079 | { | |
1080 | return tifm_register_driver(&tifm_sd_driver); | |
1081 | } | |
1082 | ||
1083 | static void __exit tifm_sd_exit(void) | |
1084 | { | |
1085 | tifm_unregister_driver(&tifm_sd_driver); | |
1086 | } | |
1087 | ||
1088 | MODULE_AUTHOR("Alex Dubov"); | |
1089 | MODULE_DESCRIPTION("TI FlashMedia SD driver"); | |
1090 | MODULE_LICENSE("GPL"); | |
1091 | MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); | |
1092 | MODULE_VERSION(DRIVER_VERSION); | |
1093 | ||
1094 | module_init(tifm_sd_init); | |
1095 | module_exit(tifm_sd_exit); |