Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4020f2d7 AD |
2 | /* |
3 | * tifm_sd.c - TI FlashMedia driver | |
4 | * | |
5 | * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> | |
6 | * | |
91f8d011 | 7 | * Special thanks to Brad Campbell for extensive testing of this driver. |
4020f2d7 AD |
8 | */ |
9 | ||
10 | ||
11 | #include <linux/tifm.h> | |
4020f2d7 AD |
12 | #include <linux/mmc/host.h> |
13 | #include <linux/highmem.h> | |
13cdf48e | 14 | #include <linux/scatterlist.h> |
88b47679 | 15 | #include <linux/module.h> |
2099c99e | 16 | #include <asm/io.h> |
4020f2d7 AD |
17 | |
18 | #define DRIVER_NAME "tifm_sd" | |
4552f0cb | 19 | #define DRIVER_VERSION "0.8" |
4020f2d7 | 20 | |
90ab5ee9 RR |
21 | static bool no_dma = 0; |
22 | static bool fixed_timeout = 0; | |
4020f2d7 AD |
23 | module_param(no_dma, bool, 0644); |
24 | module_param(fixed_timeout, bool, 0644); | |
25 | ||
26 | /* Constants here are mostly from OMAP5912 datasheet */ | |
27 | #define TIFM_MMCSD_RESET 0x0002 | |
28 | #define TIFM_MMCSD_CLKMASK 0x03ff | |
29 | #define TIFM_MMCSD_POWER 0x0800 | |
30 | #define TIFM_MMCSD_4BBUS 0x8000 | |
31 | #define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */ | |
32 | #define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */ | |
33 | #define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */ | |
34 | #define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */ | |
35 | #define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */ | |
36 | #define TIFM_MMCSD_READ 0x8000 | |
37 | ||
12c83452 | 38 | #define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */ |
4020f2d7 | 39 | #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ |
91f8d011 | 40 | #define TIFM_MMCSD_CD 0x0002 /* card detect */ |
4020f2d7 AD |
41 | #define TIFM_MMCSD_CB 0x0004 /* card enter busy state */ |
42 | #define TIFM_MMCSD_BRS 0x0008 /* block received/sent */ | |
43 | #define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */ | |
44 | #define TIFM_MMCSD_DTO 0x0020 /* data time-out */ | |
45 | #define TIFM_MMCSD_DCRC 0x0040 /* data crc error */ | |
46 | #define TIFM_MMCSD_CTO 0x0080 /* command time-out */ | |
47 | #define TIFM_MMCSD_CCRC 0x0100 /* command crc error */ | |
48 | #define TIFM_MMCSD_AF 0x0400 /* fifo almost full */ | |
49 | #define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */ | |
91f8d011 AD |
50 | #define TIFM_MMCSD_OCRB 0x1000 /* OCR busy */ |
51 | #define TIFM_MMCSD_CIRQ 0x2000 /* card irq (cmd40/sdio) */ | |
4020f2d7 AD |
52 | #define TIFM_MMCSD_CERR 0x4000 /* card status error */ |
53 | ||
0007d483 AD |
54 | #define TIFM_MMCSD_ODTO 0x0040 /* open drain / extended timeout */ |
55 | #define TIFM_MMCSD_CARD_RO 0x0200 /* card is read-only */ | |
56 | ||
4020f2d7 AD |
57 | #define TIFM_MMCSD_FIFO_SIZE 0x0020 |
58 | ||
59 | #define TIFM_MMCSD_RSP_R0 0x0000 | |
60 | #define TIFM_MMCSD_RSP_R1 0x0100 | |
61 | #define TIFM_MMCSD_RSP_R2 0x0200 | |
62 | #define TIFM_MMCSD_RSP_R3 0x0300 | |
63 | #define TIFM_MMCSD_RSP_R4 0x0400 | |
64 | #define TIFM_MMCSD_RSP_R5 0x0500 | |
65 | #define TIFM_MMCSD_RSP_R6 0x0600 | |
66 | ||
67 | #define TIFM_MMCSD_RSP_BUSY 0x0800 | |
68 | ||
69 | #define TIFM_MMCSD_CMD_BC 0x0000 | |
70 | #define TIFM_MMCSD_CMD_BCR 0x1000 | |
71 | #define TIFM_MMCSD_CMD_AC 0x2000 | |
72 | #define TIFM_MMCSD_CMD_ADTC 0x3000 | |
73 | ||
13cdf48e AD |
74 | #define TIFM_MMCSD_MAX_BLOCK_SIZE 0x0800UL |
75 | ||
0b05c977 UH |
76 | #define TIFM_MMCSD_REQ_TIMEOUT_MS 1000 |
77 | ||
4020f2d7 | 78 | enum { |
72dc9d96 AD |
79 | CMD_READY = 0x0001, |
80 | FIFO_READY = 0x0002, | |
81 | BRS_READY = 0x0004, | |
82 | SCMD_ACTIVE = 0x0008, | |
83 | SCMD_READY = 0x0010, | |
84 | CARD_BUSY = 0x0020, | |
85 | DATA_CARRY = 0x0040 | |
0007d483 | 86 | }; |
4020f2d7 AD |
87 | |
88 | struct tifm_sd { | |
91f8d011 | 89 | struct tifm_dev *dev; |
4020f2d7 | 90 | |
91f8d011 AD |
91 | unsigned short eject:1, |
92 | open_drain:1, | |
93 | no_dma:1; | |
94 | unsigned short cmd_flags; | |
72dc9d96 | 95 | |
91f8d011 AD |
96 | unsigned int clk_freq; |
97 | unsigned int clk_div; | |
98 | unsigned long timeout_jiffies; | |
4020f2d7 | 99 | |
8e02f858 | 100 | struct tasklet_struct finish_tasklet; |
0803dd0c | 101 | struct timer_list timer; |
4020f2d7 | 102 | struct mmc_request *req; |
4020f2d7 | 103 | |
13cdf48e AD |
104 | int sg_len; |
105 | int sg_pos; | |
106 | unsigned int block_pos; | |
107 | struct scatterlist bounce_buf; | |
108 | unsigned char bounce_buf_data[TIFM_MMCSD_MAX_BLOCK_SIZE]; | |
4020f2d7 AD |
109 | }; |
110 | ||
13cdf48e AD |
111 | /* for some reason, host won't respond correctly to readw/writew */ |
112 | static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg, | |
113 | unsigned int off, unsigned int cnt) | |
255ef22e | 114 | { |
13cdf48e AD |
115 | struct tifm_dev *sock = host->dev; |
116 | unsigned char *buf; | |
117 | unsigned int pos = 0, val; | |
118 | ||
4526cdaf | 119 | buf = kmap_local_page(pg) + off; |
13cdf48e AD |
120 | if (host->cmd_flags & DATA_CARRY) { |
121 | buf[pos++] = host->bounce_buf_data[0]; | |
122 | host->cmd_flags &= ~DATA_CARRY; | |
123 | } | |
124 | ||
125 | while (pos < cnt) { | |
126 | val = readl(sock->addr + SOCK_MMCSD_DATA); | |
127 | buf[pos++] = val & 0xff; | |
128 | if (pos == cnt) { | |
129 | host->bounce_buf_data[0] = (val >> 8) & 0xff; | |
130 | host->cmd_flags |= DATA_CARRY; | |
131 | break; | |
132 | } | |
133 | buf[pos++] = (val >> 8) & 0xff; | |
134 | } | |
4526cdaf | 135 | kunmap_local(buf - off); |
255ef22e AD |
136 | } |
137 | ||
13cdf48e AD |
138 | static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg, |
139 | unsigned int off, unsigned int cnt) | |
4020f2d7 | 140 | { |
13cdf48e AD |
141 | struct tifm_dev *sock = host->dev; |
142 | unsigned char *buf; | |
143 | unsigned int pos = 0, val; | |
144 | ||
4526cdaf | 145 | buf = kmap_local_page(pg) + off; |
13cdf48e AD |
146 | if (host->cmd_flags & DATA_CARRY) { |
147 | val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00); | |
148 | writel(val, sock->addr + SOCK_MMCSD_DATA); | |
149 | host->cmd_flags &= ~DATA_CARRY; | |
150 | } | |
151 | ||
152 | while (pos < cnt) { | |
153 | val = buf[pos++]; | |
154 | if (pos == cnt) { | |
155 | host->bounce_buf_data[0] = val & 0xff; | |
156 | host->cmd_flags |= DATA_CARRY; | |
157 | break; | |
4020f2d7 | 158 | } |
13cdf48e AD |
159 | val |= (buf[pos++] << 8) & 0xff00; |
160 | writel(val, sock->addr + SOCK_MMCSD_DATA); | |
161 | } | |
4526cdaf | 162 | kunmap_local(buf - off); |
13cdf48e AD |
163 | } |
164 | ||
165 | static void tifm_sd_transfer_data(struct tifm_sd *host) | |
166 | { | |
167 | struct mmc_data *r_data = host->req->cmd->data; | |
168 | struct scatterlist *sg = r_data->sg; | |
169 | unsigned int off, cnt, t_size = TIFM_MMCSD_FIFO_SIZE * 2; | |
170 | unsigned int p_off, p_cnt; | |
171 | struct page *pg; | |
172 | ||
173 | if (host->sg_pos == host->sg_len) | |
174 | return; | |
175 | while (t_size) { | |
176 | cnt = sg[host->sg_pos].length - host->block_pos; | |
177 | if (!cnt) { | |
178 | host->block_pos = 0; | |
179 | host->sg_pos++; | |
180 | if (host->sg_pos == host->sg_len) { | |
181 | if ((r_data->flags & MMC_DATA_WRITE) | |
ce636452 | 182 | && (host->cmd_flags & DATA_CARRY)) |
13cdf48e AD |
183 | writel(host->bounce_buf_data[0], |
184 | host->dev->addr | |
185 | + SOCK_MMCSD_DATA); | |
186 | ||
187 | return; | |
4020f2d7 | 188 | } |
13cdf48e | 189 | cnt = sg[host->sg_pos].length; |
4020f2d7 | 190 | } |
13cdf48e AD |
191 | off = sg[host->sg_pos].offset + host->block_pos; |
192 | ||
45711f1a | 193 | pg = nth_page(sg_page(&sg[host->sg_pos]), off >> PAGE_SHIFT); |
13cdf48e AD |
194 | p_off = offset_in_page(off); |
195 | p_cnt = PAGE_SIZE - p_off; | |
196 | p_cnt = min(p_cnt, cnt); | |
197 | p_cnt = min(p_cnt, t_size); | |
198 | ||
199 | if (r_data->flags & MMC_DATA_READ) | |
200 | tifm_sd_read_fifo(host, pg, p_off, p_cnt); | |
201 | else if (r_data->flags & MMC_DATA_WRITE) | |
202 | tifm_sd_write_fifo(host, pg, p_off, p_cnt); | |
203 | ||
204 | t_size -= p_cnt; | |
205 | host->block_pos += p_cnt; | |
4020f2d7 | 206 | } |
13cdf48e AD |
207 | } |
208 | ||
209 | static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off, | |
210 | struct page *src, unsigned int src_off, | |
211 | unsigned int count) | |
212 | { | |
4526cdaf AH |
213 | unsigned char *src_buf = kmap_local_page(src) + src_off; |
214 | unsigned char *dst_buf = kmap_local_page(dst) + dst_off; | |
13cdf48e AD |
215 | |
216 | memcpy(dst_buf, src_buf, count); | |
217 | ||
4526cdaf AH |
218 | kunmap_local(dst_buf - dst_off); |
219 | kunmap_local(src_buf - src_off); | |
13cdf48e AD |
220 | } |
221 | ||
222 | static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data) | |
223 | { | |
224 | struct scatterlist *sg = r_data->sg; | |
225 | unsigned int t_size = r_data->blksz; | |
226 | unsigned int off, cnt; | |
227 | unsigned int p_off, p_cnt; | |
228 | struct page *pg; | |
229 | ||
230 | dev_dbg(&host->dev->dev, "bouncing block\n"); | |
231 | while (t_size) { | |
232 | cnt = sg[host->sg_pos].length - host->block_pos; | |
233 | if (!cnt) { | |
234 | host->block_pos = 0; | |
235 | host->sg_pos++; | |
236 | if (host->sg_pos == host->sg_len) | |
237 | return; | |
238 | cnt = sg[host->sg_pos].length; | |
239 | } | |
240 | off = sg[host->sg_pos].offset + host->block_pos; | |
241 | ||
45711f1a | 242 | pg = nth_page(sg_page(&sg[host->sg_pos]), off >> PAGE_SHIFT); |
13cdf48e AD |
243 | p_off = offset_in_page(off); |
244 | p_cnt = PAGE_SIZE - p_off; | |
245 | p_cnt = min(p_cnt, cnt); | |
246 | p_cnt = min(p_cnt, t_size); | |
247 | ||
248 | if (r_data->flags & MMC_DATA_WRITE) | |
45711f1a | 249 | tifm_sd_copy_page(sg_page(&host->bounce_buf), |
13cdf48e AD |
250 | r_data->blksz - t_size, |
251 | pg, p_off, p_cnt); | |
252 | else if (r_data->flags & MMC_DATA_READ) | |
45711f1a | 253 | tifm_sd_copy_page(pg, p_off, sg_page(&host->bounce_buf), |
13cdf48e AD |
254 | r_data->blksz - t_size, p_cnt); |
255 | ||
256 | t_size -= p_cnt; | |
257 | host->block_pos += p_cnt; | |
258 | } | |
259 | } | |
260 | ||
d97956f8 | 261 | static int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data) |
13cdf48e AD |
262 | { |
263 | struct tifm_dev *sock = host->dev; | |
264 | unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz; | |
265 | unsigned int dma_len, dma_blk_cnt, dma_off; | |
266 | struct scatterlist *sg = NULL; | |
13cdf48e AD |
267 | |
268 | if (host->sg_pos == host->sg_len) | |
269 | return 1; | |
270 | ||
271 | if (host->cmd_flags & DATA_CARRY) { | |
272 | host->cmd_flags &= ~DATA_CARRY; | |
13cdf48e | 273 | tifm_sd_bounce_block(host, r_data); |
13cdf48e AD |
274 | if (host->sg_pos == host->sg_len) |
275 | return 1; | |
276 | } | |
277 | ||
278 | dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos; | |
279 | if (!dma_len) { | |
280 | host->block_pos = 0; | |
281 | host->sg_pos++; | |
282 | if (host->sg_pos == host->sg_len) | |
283 | return 1; | |
284 | dma_len = sg_dma_len(&r_data->sg[host->sg_pos]); | |
285 | } | |
286 | ||
287 | if (dma_len < t_size) { | |
288 | dma_blk_cnt = dma_len / r_data->blksz; | |
289 | dma_off = host->block_pos; | |
290 | host->block_pos += dma_blk_cnt * r_data->blksz; | |
291 | } else { | |
292 | dma_blk_cnt = TIFM_DMA_TSIZE; | |
293 | dma_off = host->block_pos; | |
294 | host->block_pos += t_size; | |
295 | } | |
296 | ||
297 | if (dma_blk_cnt) | |
298 | sg = &r_data->sg[host->sg_pos]; | |
299 | else if (dma_len) { | |
36bbdc30 | 300 | if (r_data->flags & MMC_DATA_WRITE) |
13cdf48e | 301 | tifm_sd_bounce_block(host, r_data); |
36bbdc30 | 302 | else |
13cdf48e AD |
303 | host->cmd_flags |= DATA_CARRY; |
304 | ||
305 | sg = &host->bounce_buf; | |
306 | dma_off = 0; | |
307 | dma_blk_cnt = 1; | |
308 | } else | |
309 | return 1; | |
310 | ||
311 | dev_dbg(&sock->dev, "setting dma for %d blocks\n", dma_blk_cnt); | |
312 | writel(sg_dma_address(sg) + dma_off, sock->addr + SOCK_DMA_ADDRESS); | |
313 | if (r_data->flags & MMC_DATA_WRITE) | |
314 | writel((dma_blk_cnt << 8) | TIFM_DMA_TX | TIFM_DMA_EN, | |
315 | sock->addr + SOCK_DMA_CONTROL); | |
316 | else | |
317 | writel((dma_blk_cnt << 8) | TIFM_DMA_EN, | |
318 | sock->addr + SOCK_DMA_CONTROL); | |
319 | ||
4020f2d7 AD |
320 | return 0; |
321 | } | |
322 | ||
323 | static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) | |
324 | { | |
325 | unsigned int rc = 0; | |
326 | ||
327 | switch (mmc_resp_type(cmd)) { | |
328 | case MMC_RSP_NONE: | |
329 | rc |= TIFM_MMCSD_RSP_R0; | |
330 | break; | |
331 | case MMC_RSP_R1B: | |
a5c83eb2 | 332 | rc |= TIFM_MMCSD_RSP_BUSY; |
df561f66 | 333 | fallthrough; |
4020f2d7 AD |
334 | case MMC_RSP_R1: |
335 | rc |= TIFM_MMCSD_RSP_R1; | |
336 | break; | |
337 | case MMC_RSP_R2: | |
338 | rc |= TIFM_MMCSD_RSP_R2; | |
339 | break; | |
340 | case MMC_RSP_R3: | |
341 | rc |= TIFM_MMCSD_RSP_R3; | |
342 | break; | |
4020f2d7 AD |
343 | default: |
344 | BUG(); | |
345 | } | |
346 | ||
347 | switch (mmc_cmd_type(cmd)) { | |
348 | case MMC_CMD_BC: | |
349 | rc |= TIFM_MMCSD_CMD_BC; | |
350 | break; | |
351 | case MMC_CMD_BCR: | |
352 | rc |= TIFM_MMCSD_CMD_BCR; | |
353 | break; | |
354 | case MMC_CMD_AC: | |
355 | rc |= TIFM_MMCSD_CMD_AC; | |
356 | break; | |
357 | case MMC_CMD_ADTC: | |
358 | rc |= TIFM_MMCSD_CMD_ADTC; | |
359 | break; | |
360 | default: | |
361 | BUG(); | |
362 | } | |
363 | return rc; | |
364 | } | |
365 | ||
366 | static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) | |
367 | { | |
368 | struct tifm_dev *sock = host->dev; | |
0007d483 AD |
369 | unsigned int cmd_mask = tifm_sd_op_flags(cmd); |
370 | ||
371 | if (host->open_drain) | |
372 | cmd_mask |= TIFM_MMCSD_ODTO; | |
4020f2d7 AD |
373 | |
374 | if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) | |
375 | cmd_mask |= TIFM_MMCSD_READ; | |
376 | ||
377 | dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", | |
2e8ce5e7 | 378 | cmd->opcode, cmd->arg, cmd_mask); |
4020f2d7 AD |
379 | |
380 | writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); | |
381 | writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); | |
382 | writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); | |
383 | } | |
384 | ||
385 | static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) | |
386 | { | |
387 | cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) | |
388 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); | |
389 | cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) | |
390 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); | |
391 | cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) | |
392 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); | |
393 | cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) | |
394 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); | |
395 | } | |
396 | ||
72dc9d96 | 397 | static void tifm_sd_check_status(struct tifm_sd *host) |
4020f2d7 | 398 | { |
72dc9d96 | 399 | struct tifm_dev *sock = host->dev; |
4020f2d7 AD |
400 | struct mmc_command *cmd = host->req->cmd; |
401 | ||
17b0429d | 402 | if (cmd->error) |
72dc9d96 AD |
403 | goto finish_request; |
404 | ||
405 | if (!(host->cmd_flags & CMD_READY)) | |
4020f2d7 | 406 | return; |
72dc9d96 AD |
407 | |
408 | if (cmd->data) { | |
17b0429d | 409 | if (cmd->data->error) { |
72dc9d96 AD |
410 | if ((host->cmd_flags & SCMD_ACTIVE) |
411 | && !(host->cmd_flags & SCMD_READY)) | |
412 | return; | |
413 | ||
414 | goto finish_request; | |
4020f2d7 | 415 | } |
72dc9d96 AD |
416 | |
417 | if (!(host->cmd_flags & BRS_READY)) | |
418 | return; | |
419 | ||
420 | if (!(host->no_dma || (host->cmd_flags & FIFO_READY))) | |
421 | return; | |
422 | ||
423 | if (cmd->data->flags & MMC_DATA_WRITE) { | |
424 | if (host->req->stop) { | |
425 | if (!(host->cmd_flags & SCMD_ACTIVE)) { | |
426 | host->cmd_flags |= SCMD_ACTIVE; | |
427 | writel(TIFM_MMCSD_EOFB | |
428 | | readl(sock->addr | |
429 | + SOCK_MMCSD_INT_ENABLE), | |
430 | sock->addr | |
431 | + SOCK_MMCSD_INT_ENABLE); | |
1289335a | 432 | tifm_sd_exec(host, host->req->stop); |
72dc9d96 | 433 | return; |
1289335a | 434 | } else { |
72dc9d96 AD |
435 | if (!(host->cmd_flags & SCMD_READY) |
436 | || (host->cmd_flags & CARD_BUSY)) | |
437 | return; | |
438 | writel((~TIFM_MMCSD_EOFB) | |
439 | & readl(sock->addr | |
440 | + SOCK_MMCSD_INT_ENABLE), | |
441 | sock->addr | |
442 | + SOCK_MMCSD_INT_ENABLE); | |
1289335a AD |
443 | } |
444 | } else { | |
72dc9d96 AD |
445 | if (host->cmd_flags & CARD_BUSY) |
446 | return; | |
447 | writel((~TIFM_MMCSD_EOFB) | |
448 | & readl(sock->addr | |
449 | + SOCK_MMCSD_INT_ENABLE), | |
450 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
1289335a | 451 | } |
72dc9d96 | 452 | } else { |
1289335a | 453 | if (host->req->stop) { |
72dc9d96 AD |
454 | if (!(host->cmd_flags & SCMD_ACTIVE)) { |
455 | host->cmd_flags |= SCMD_ACTIVE; | |
456 | tifm_sd_exec(host, host->req->stop); | |
457 | return; | |
458 | } else { | |
459 | if (!(host->cmd_flags & SCMD_READY)) | |
460 | return; | |
461 | } | |
1289335a | 462 | } |
4020f2d7 | 463 | } |
4020f2d7 | 464 | } |
72dc9d96 AD |
465 | finish_request: |
466 | tasklet_schedule(&host->finish_tasklet); | |
4020f2d7 AD |
467 | } |
468 | ||
469 | /* Called from interrupt handler */ | |
4552f0cb | 470 | static void tifm_sd_data_event(struct tifm_dev *sock) |
4020f2d7 AD |
471 | { |
472 | struct tifm_sd *host; | |
4552f0cb | 473 | unsigned int fifo_status = 0; |
72dc9d96 | 474 | struct mmc_data *r_data = NULL; |
4020f2d7 AD |
475 | |
476 | spin_lock(&sock->lock); | |
477 | host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); | |
4552f0cb | 478 | fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); |
72dc9d96 AD |
479 | dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n", |
480 | fifo_status, host->cmd_flags); | |
4552f0cb | 481 | |
72dc9d96 AD |
482 | if (host->req) { |
483 | r_data = host->req->cmd->data; | |
4552f0cb | 484 | |
72dc9d96 | 485 | if (r_data && (fifo_status & TIFM_FIFO_READY)) { |
13cdf48e AD |
486 | if (tifm_sd_set_dma_data(host, r_data)) { |
487 | host->cmd_flags |= FIFO_READY; | |
488 | tifm_sd_check_status(host); | |
489 | } | |
72dc9d96 AD |
490 | } |
491 | } | |
4552f0cb | 492 | |
72dc9d96 | 493 | writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); |
4552f0cb | 494 | spin_unlock(&sock->lock); |
4552f0cb AD |
495 | } |
496 | ||
497 | /* Called from interrupt handler */ | |
498 | static void tifm_sd_card_event(struct tifm_dev *sock) | |
499 | { | |
500 | struct tifm_sd *host; | |
501 | unsigned int host_status = 0; | |
17b0429d | 502 | int cmd_error = 0; |
72dc9d96 | 503 | struct mmc_command *cmd = NULL; |
4552f0cb AD |
504 | |
505 | spin_lock(&sock->lock); | |
506 | host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); | |
72dc9d96 AD |
507 | host_status = readl(sock->addr + SOCK_MMCSD_STATUS); |
508 | dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n", | |
509 | host_status, host->cmd_flags); | |
4020f2d7 | 510 | |
72dc9d96 AD |
511 | if (host->req) { |
512 | cmd = host->req->cmd; | |
4020f2d7 AD |
513 | |
514 | if (host_status & TIFM_MMCSD_ERRMASK) { | |
72dc9d96 AD |
515 | writel(host_status & TIFM_MMCSD_ERRMASK, |
516 | sock->addr + SOCK_MMCSD_STATUS); | |
517 | if (host_status & TIFM_MMCSD_CTO) | |
17b0429d | 518 | cmd_error = -ETIMEDOUT; |
72dc9d96 | 519 | else if (host_status & TIFM_MMCSD_CCRC) |
17b0429d | 520 | cmd_error = -EILSEQ; |
72dc9d96 AD |
521 | |
522 | if (cmd->data) { | |
523 | if (host_status & TIFM_MMCSD_DTO) | |
17b0429d | 524 | cmd->data->error = -ETIMEDOUT; |
72dc9d96 | 525 | else if (host_status & TIFM_MMCSD_DCRC) |
17b0429d | 526 | cmd->data->error = -EILSEQ; |
72dc9d96 | 527 | } |
4020f2d7 AD |
528 | |
529 | writel(TIFM_FIFO_INT_SETALL, | |
530 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
531 | writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); | |
532 | ||
533 | if (host->req->stop) { | |
72dc9d96 AD |
534 | if (host->cmd_flags & SCMD_ACTIVE) { |
535 | host->req->stop->error = cmd_error; | |
536 | host->cmd_flags |= SCMD_READY; | |
537 | } else { | |
538 | cmd->error = cmd_error; | |
539 | host->cmd_flags |= SCMD_ACTIVE; | |
4020f2d7 | 540 | tifm_sd_exec(host, host->req->stop); |
4020f2d7 | 541 | goto done; |
4020f2d7 | 542 | } |
72dc9d96 AD |
543 | } else |
544 | cmd->error = cmd_error; | |
545 | } else { | |
546 | if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) { | |
547 | if (!(host->cmd_flags & CMD_READY)) { | |
548 | host->cmd_flags |= CMD_READY; | |
549 | tifm_sd_fetch_resp(cmd, sock); | |
550 | } else if (host->cmd_flags & SCMD_ACTIVE) { | |
551 | host->cmd_flags |= SCMD_READY; | |
552 | tifm_sd_fetch_resp(host->req->stop, | |
553 | sock); | |
554 | } | |
4020f2d7 | 555 | } |
72dc9d96 AD |
556 | if (host_status & TIFM_MMCSD_BRS) |
557 | host->cmd_flags |= BRS_READY; | |
4020f2d7 AD |
558 | } |
559 | ||
72dc9d96 AD |
560 | if (host->no_dma && cmd->data) { |
561 | if (host_status & TIFM_MMCSD_AE) | |
562 | writel(host_status & TIFM_MMCSD_AE, | |
563 | sock->addr + SOCK_MMCSD_STATUS); | |
564 | ||
565 | if (host_status & (TIFM_MMCSD_AE | TIFM_MMCSD_AF | |
566 | | TIFM_MMCSD_BRS)) { | |
13cdf48e | 567 | tifm_sd_transfer_data(host); |
72dc9d96 AD |
568 | host_status &= ~TIFM_MMCSD_AE; |
569 | } | |
4020f2d7 | 570 | } |
4020f2d7 | 571 | |
72dc9d96 AD |
572 | if (host_status & TIFM_MMCSD_EOFB) |
573 | host->cmd_flags &= ~CARD_BUSY; | |
574 | else if (host_status & TIFM_MMCSD_CB) | |
575 | host->cmd_flags |= CARD_BUSY; | |
576 | ||
577 | tifm_sd_check_status(host); | |
578 | } | |
4020f2d7 | 579 | done: |
72dc9d96 | 580 | writel(host_status, sock->addr + SOCK_MMCSD_STATUS); |
4020f2d7 | 581 | spin_unlock(&sock->lock); |
4020f2d7 AD |
582 | } |
583 | ||
4020f2d7 | 584 | static void tifm_sd_set_data_timeout(struct tifm_sd *host, |
2e8ce5e7 | 585 | struct mmc_data *data) |
4020f2d7 AD |
586 | { |
587 | struct tifm_dev *sock = host->dev; | |
588 | unsigned int data_timeout = data->timeout_clks; | |
589 | ||
590 | if (fixed_timeout) | |
591 | return; | |
592 | ||
593 | data_timeout += data->timeout_ns / | |
83d420ba | 594 | ((1000000000UL / host->clk_freq) * host->clk_div); |
4020f2d7 AD |
595 | |
596 | if (data_timeout < 0xffff) { | |
4020f2d7 | 597 | writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); |
83d420ba AD |
598 | writel((~TIFM_MMCSD_DPE) |
599 | & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), | |
600 | sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); | |
4020f2d7 | 601 | } else { |
4020f2d7 | 602 | data_timeout = (data_timeout >> 10) + 1; |
2e8ce5e7 | 603 | if (data_timeout > 0xffff) |
4020f2d7 AD |
604 | data_timeout = 0; /* set to unlimited */ |
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 AD |
609 | } |
610 | } | |
611 | ||
612 | static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
613 | { | |
614 | struct tifm_sd *host = mmc_priv(mmc); | |
615 | struct tifm_dev *sock = host->dev; | |
616 | unsigned long flags; | |
4020f2d7 AD |
617 | struct mmc_data *r_data = mrq->cmd->data; |
618 | ||
619 | spin_lock_irqsave(&sock->lock, flags); | |
0007d483 | 620 | if (host->eject) { |
255d01af | 621 | mrq->cmd->error = -ENOMEDIUM; |
4020f2d7 AD |
622 | goto err_out; |
623 | } | |
624 | ||
625 | if (host->req) { | |
a3c76eb9 | 626 | pr_err("%s : unfinished request detected\n", |
d1b26863 | 627 | dev_name(&sock->dev)); |
255d01af PO |
628 | mrq->cmd->error = -ETIMEDOUT; |
629 | goto err_out; | |
630 | } | |
631 | ||
13cdf48e AD |
632 | host->cmd_flags = 0; |
633 | host->block_pos = 0; | |
634 | host->sg_pos = 0; | |
635 | ||
b37a0506 AD |
636 | if (mrq->data && !is_power_of_2(mrq->data->blksz)) |
637 | host->no_dma = 1; | |
638 | else | |
639 | host->no_dma = no_dma ? 1 : 0; | |
640 | ||
4020f2d7 AD |
641 | if (r_data) { |
642 | tifm_sd_set_data_timeout(host, r_data); | |
643 | ||
13cdf48e AD |
644 | if ((r_data->flags & MMC_DATA_WRITE) && !mrq->stop) |
645 | writel(TIFM_MMCSD_EOFB | |
646 | | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
647 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
dfef26d9 | 648 | |
13cdf48e | 649 | if (host->no_dma) { |
dfef26d9 AD |
650 | writel(TIFM_MMCSD_BUFINT |
651 | | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
652 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
653 | writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) | |
654 | | (TIFM_MMCSD_FIFO_SIZE - 1), | |
655 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
656 | ||
13cdf48e | 657 | host->sg_len = r_data->sg_len; |
dfef26d9 | 658 | } else { |
13cdf48e AD |
659 | sg_init_one(&host->bounce_buf, host->bounce_buf_data, |
660 | r_data->blksz); | |
661 | ||
662 | if(1 != tifm_map_sg(sock, &host->bounce_buf, 1, | |
663 | r_data->flags & MMC_DATA_WRITE | |
b048457c CJ |
664 | ? DMA_TO_DEVICE |
665 | : DMA_FROM_DEVICE)) { | |
a3c76eb9 | 666 | pr_err("%s : scatterlist map failed\n", |
d1b26863 | 667 | dev_name(&sock->dev)); |
b37a0506 | 668 | mrq->cmd->error = -ENOMEM; |
13cdf48e AD |
669 | goto err_out; |
670 | } | |
671 | host->sg_len = tifm_map_sg(sock, r_data->sg, | |
672 | r_data->sg_len, | |
673 | r_data->flags | |
674 | & MMC_DATA_WRITE | |
b048457c CJ |
675 | ? DMA_TO_DEVICE |
676 | : DMA_FROM_DEVICE); | |
13cdf48e | 677 | if (host->sg_len < 1) { |
a3c76eb9 | 678 | pr_err("%s : scatterlist map failed\n", |
d1b26863 | 679 | dev_name(&sock->dev)); |
13cdf48e AD |
680 | tifm_unmap_sg(sock, &host->bounce_buf, 1, |
681 | r_data->flags & MMC_DATA_WRITE | |
b048457c CJ |
682 | ? DMA_TO_DEVICE |
683 | : DMA_FROM_DEVICE); | |
b37a0506 | 684 | mrq->cmd->error = -ENOMEM; |
dfef26d9 AD |
685 | goto err_out; |
686 | } | |
4020f2d7 | 687 | |
13cdf48e AD |
688 | writel(TIFM_FIFO_INT_SETALL, |
689 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
690 | writel(ilog2(r_data->blksz) - 2, | |
691 | sock->addr + SOCK_FIFO_PAGE_SIZE); | |
692 | writel(TIFM_FIFO_ENABLE, | |
693 | sock->addr + SOCK_FIFO_CONTROL); | |
694 | writel(TIFM_FIFO_INTMASK, | |
695 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); | |
696 | ||
697 | if (r_data->flags & MMC_DATA_WRITE) | |
698 | writel(TIFM_MMCSD_TXDE, | |
699 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
700 | else | |
701 | writel(TIFM_MMCSD_RXDE, | |
702 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
703 | ||
704 | tifm_sd_set_dma_data(host, r_data); | |
dfef26d9 | 705 | } |
13cdf48e AD |
706 | |
707 | writel(r_data->blocks - 1, | |
708 | sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
709 | writel(r_data->blksz - 1, | |
710 | sock->addr + SOCK_MMCSD_BLOCK_LEN); | |
4020f2d7 AD |
711 | } |
712 | ||
713 | host->req = mrq; | |
0803dd0c | 714 | mod_timer(&host->timer, jiffies + host->timeout_jiffies); |
4020f2d7 | 715 | writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), |
2e8ce5e7 | 716 | sock->addr + SOCK_CONTROL); |
4020f2d7 AD |
717 | tifm_sd_exec(host, mrq->cmd); |
718 | spin_unlock_irqrestore(&sock->lock, flags); | |
719 | return; | |
720 | ||
721 | err_out: | |
255d01af | 722 | spin_unlock_irqrestore(&sock->lock, flags); |
4020f2d7 AD |
723 | mmc_request_done(mmc, mrq); |
724 | } | |
725 | ||
c36dd042 | 726 | static void tifm_sd_end_cmd(struct tasklet_struct *t) |
4020f2d7 | 727 | { |
c36dd042 | 728 | struct tifm_sd *host = from_tasklet(host, t, finish_tasklet); |
4020f2d7 AD |
729 | struct tifm_dev *sock = host->dev; |
730 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
731 | struct mmc_request *mrq; | |
e069d79d | 732 | struct mmc_data *r_data = NULL; |
4020f2d7 AD |
733 | unsigned long flags; |
734 | ||
735 | spin_lock_irqsave(&sock->lock, flags); | |
736 | ||
0803dd0c | 737 | del_timer(&host->timer); |
4020f2d7 | 738 | mrq = host->req; |
e069d79d | 739 | host->req = NULL; |
4020f2d7 AD |
740 | |
741 | if (!mrq) { | |
a3c76eb9 | 742 | pr_err(" %s : no request to complete?\n", |
d1b26863 | 743 | dev_name(&sock->dev)); |
4020f2d7 AD |
744 | spin_unlock_irqrestore(&sock->lock, flags); |
745 | return; | |
746 | } | |
747 | ||
748 | r_data = mrq->cmd->data; | |
749 | if (r_data) { | |
dfef26d9 | 750 | if (host->no_dma) { |
13cdf48e AD |
751 | writel((~TIFM_MMCSD_BUFINT) |
752 | & readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
753 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
4020f2d7 | 754 | } else { |
13cdf48e AD |
755 | tifm_unmap_sg(sock, &host->bounce_buf, 1, |
756 | (r_data->flags & MMC_DATA_WRITE) | |
b048457c | 757 | ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
dfef26d9 AD |
758 | tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, |
759 | (r_data->flags & MMC_DATA_WRITE) | |
b048457c | 760 | ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
4020f2d7 | 761 | } |
13cdf48e AD |
762 | |
763 | r_data->bytes_xfered = r_data->blocks | |
764 | - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; | |
765 | r_data->bytes_xfered *= r_data->blksz; | |
766 | r_data->bytes_xfered += r_data->blksz | |
767 | - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; | |
4020f2d7 AD |
768 | } |
769 | ||
770 | writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), | |
2e8ce5e7 | 771 | sock->addr + SOCK_CONTROL); |
4020f2d7 AD |
772 | |
773 | spin_unlock_irqrestore(&sock->lock, flags); | |
4020f2d7 AD |
774 | mmc_request_done(mmc, mrq); |
775 | } | |
776 | ||
2ee4f620 | 777 | static void tifm_sd_abort(struct timer_list *t) |
4020f2d7 | 778 | { |
2ee4f620 | 779 | struct tifm_sd *host = from_timer(host, t, timer); |
8e02f858 | 780 | |
a3c76eb9 | 781 | pr_err("%s : card failed to respond for a long period of time " |
91f8d011 | 782 | "(%x, %x)\n", |
d1b26863 | 783 | dev_name(&host->dev->dev), host->req->cmd->opcode, host->cmd_flags); |
8e02f858 | 784 | |
8e02f858 | 785 | tifm_eject(host->dev); |
4020f2d7 AD |
786 | } |
787 | ||
788 | static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
789 | { | |
790 | struct tifm_sd *host = mmc_priv(mmc); | |
791 | struct tifm_dev *sock = host->dev; | |
792 | unsigned int clk_div1, clk_div2; | |
793 | unsigned long flags; | |
794 | ||
795 | spin_lock_irqsave(&sock->lock, flags); | |
796 | ||
91f8d011 AD |
797 | dev_dbg(&sock->dev, "ios: clock = %u, vdd = %x, bus_mode = %x, " |
798 | "chip_select = %x, power_mode = %x, bus_width = %x\n", | |
799 | ios->clock, ios->vdd, ios->bus_mode, ios->chip_select, | |
800 | ios->power_mode, ios->bus_width); | |
801 | ||
4020f2d7 AD |
802 | if (ios->bus_width == MMC_BUS_WIDTH_4) { |
803 | writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), | |
804 | sock->addr + SOCK_MMCSD_CONFIG); | |
805 | } else { | |
2e8ce5e7 AD |
806 | writel((~TIFM_MMCSD_4BBUS) |
807 | & readl(sock->addr + SOCK_MMCSD_CONFIG), | |
808 | sock->addr + SOCK_MMCSD_CONFIG); | |
4020f2d7 AD |
809 | } |
810 | ||
811 | if (ios->clock) { | |
812 | clk_div1 = 20000000 / ios->clock; | |
813 | if (!clk_div1) | |
814 | clk_div1 = 1; | |
815 | ||
816 | clk_div2 = 24000000 / ios->clock; | |
817 | if (!clk_div2) | |
818 | clk_div2 = 1; | |
819 | ||
820 | if ((20000000 / clk_div1) > ios->clock) | |
821 | clk_div1++; | |
822 | if ((24000000 / clk_div2) > ios->clock) | |
823 | clk_div2++; | |
824 | if ((20000000 / clk_div1) > (24000000 / clk_div2)) { | |
825 | host->clk_freq = 20000000; | |
826 | host->clk_div = clk_div1; | |
2e8ce5e7 AD |
827 | writel((~TIFM_CTRL_FAST_CLK) |
828 | & readl(sock->addr + SOCK_CONTROL), | |
829 | sock->addr + SOCK_CONTROL); | |
4020f2d7 AD |
830 | } else { |
831 | host->clk_freq = 24000000; | |
832 | host->clk_div = clk_div2; | |
2e8ce5e7 AD |
833 | writel(TIFM_CTRL_FAST_CLK |
834 | | readl(sock->addr + SOCK_CONTROL), | |
835 | sock->addr + SOCK_CONTROL); | |
4020f2d7 AD |
836 | } |
837 | } else { | |
838 | host->clk_div = 0; | |
839 | } | |
840 | host->clk_div &= TIFM_MMCSD_CLKMASK; | |
2e8ce5e7 AD |
841 | writel(host->clk_div |
842 | | ((~TIFM_MMCSD_CLKMASK) | |
843 | & readl(sock->addr + SOCK_MMCSD_CONFIG)), | |
844 | sock->addr + SOCK_MMCSD_CONFIG); | |
4020f2d7 | 845 | |
0007d483 | 846 | host->open_drain = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN); |
4020f2d7 AD |
847 | |
848 | /* chip_select : maybe later */ | |
849 | //vdd | |
850 | //power is set before probe / after remove | |
4020f2d7 AD |
851 | |
852 | spin_unlock_irqrestore(&sock->lock, flags); | |
853 | } | |
854 | ||
855 | static int tifm_sd_ro(struct mmc_host *mmc) | |
856 | { | |
0007d483 | 857 | int rc = 0; |
4020f2d7 AD |
858 | struct tifm_sd *host = mmc_priv(mmc); |
859 | struct tifm_dev *sock = host->dev; | |
860 | unsigned long flags; | |
861 | ||
862 | spin_lock_irqsave(&sock->lock, flags); | |
0007d483 AD |
863 | if (TIFM_MMCSD_CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)) |
864 | rc = 1; | |
4020f2d7 AD |
865 | spin_unlock_irqrestore(&sock->lock, flags); |
866 | return rc; | |
867 | } | |
868 | ||
dfef26d9 | 869 | static const struct mmc_host_ops tifm_sd_ops = { |
4020f2d7 AD |
870 | .request = tifm_sd_request, |
871 | .set_ios = tifm_sd_ios, | |
872 | .get_ro = tifm_sd_ro | |
873 | }; | |
874 | ||
8e02f858 | 875 | static int tifm_sd_initialize_host(struct tifm_sd *host) |
4020f2d7 | 876 | { |
8e02f858 AD |
877 | int rc; |
878 | unsigned int host_status = 0; | |
4020f2d7 | 879 | struct tifm_dev *sock = host->dev; |
4020f2d7 | 880 | |
8e02f858 | 881 | writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); |
8e02f858 AD |
882 | host->clk_div = 61; |
883 | host->clk_freq = 20000000; | |
884 | writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); | |
885 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
886 | sock->addr + SOCK_MMCSD_CONFIG); | |
887 | ||
888 | /* wait up to 0.51 sec for reset */ | |
5897d657 | 889 | for (rc = 32; rc <= 256; rc <<= 1) { |
8e02f858 AD |
890 | if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { |
891 | rc = 0; | |
892 | break; | |
893 | } | |
894 | msleep(rc); | |
895 | } | |
896 | ||
897 | if (rc) { | |
a3c76eb9 | 898 | pr_err("%s : controller failed to reset\n", |
d1b26863 | 899 | dev_name(&sock->dev)); |
8e02f858 AD |
900 | return -ENODEV; |
901 | } | |
902 | ||
903 | writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
904 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
905 | sock->addr + SOCK_MMCSD_CONFIG); | |
906 | writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
907 | ||
908 | // command timeout fixed to 64 clocks for now | |
909 | writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); | |
910 | writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); | |
911 | ||
5897d657 | 912 | for (rc = 16; rc <= 64; rc <<= 1) { |
8e02f858 AD |
913 | host_status = readl(sock->addr + SOCK_MMCSD_STATUS); |
914 | writel(host_status, sock->addr + SOCK_MMCSD_STATUS); | |
915 | if (!(host_status & TIFM_MMCSD_ERRMASK) | |
916 | && (host_status & TIFM_MMCSD_EOC)) { | |
917 | rc = 0; | |
918 | break; | |
919 | } | |
920 | msleep(rc); | |
921 | } | |
922 | ||
923 | if (rc) { | |
a3c76eb9 | 924 | pr_err("%s : card not ready - probe failed on initialization\n", |
d1b26863 | 925 | dev_name(&sock->dev)); |
8e02f858 AD |
926 | return -ENODEV; |
927 | } | |
928 | ||
5897d657 AD |
929 | writel(TIFM_MMCSD_CERR | TIFM_MMCSD_BRS | TIFM_MMCSD_EOC |
930 | | TIFM_MMCSD_ERRMASK, | |
8e02f858 | 931 | sock->addr + SOCK_MMCSD_INT_ENABLE); |
8e02f858 AD |
932 | |
933 | return 0; | |
4020f2d7 AD |
934 | } |
935 | ||
936 | static int tifm_sd_probe(struct tifm_dev *sock) | |
937 | { | |
938 | struct mmc_host *mmc; | |
939 | struct tifm_sd *host; | |
940 | int rc = -EIO; | |
941 | ||
2e8ce5e7 AD |
942 | if (!(TIFM_SOCK_STATE_OCCUPIED |
943 | & readl(sock->addr + SOCK_PRESENT_STATE))) { | |
6606110d JP |
944 | pr_warn("%s : card gone, unexpectedly\n", |
945 | dev_name(&sock->dev)); | |
4020f2d7 AD |
946 | return rc; |
947 | } | |
948 | ||
949 | mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); | |
950 | if (!mmc) | |
951 | return -ENOMEM; | |
952 | ||
953 | host = mmc_priv(mmc); | |
4020f2d7 | 954 | tifm_set_drvdata(sock, mmc); |
8e02f858 | 955 | host->dev = sock; |
0b05c977 UH |
956 | host->timeout_jiffies = msecs_to_jiffies(TIFM_MMCSD_REQ_TIMEOUT_MS); |
957 | /* | |
958 | * We use a fixed request timeout of 1s, hence inform the core about it. | |
959 | * A future improvement should instead respect the cmd->busy_timeout. | |
960 | */ | |
961 | mmc->max_busy_timeout = TIFM_MMCSD_REQ_TIMEOUT_MS; | |
4020f2d7 | 962 | |
c36dd042 | 963 | tasklet_setup(&host->finish_tasklet, tifm_sd_end_cmd); |
2ee4f620 | 964 | timer_setup(&host->timer, tifm_sd_abort, 0); |
8e02f858 | 965 | |
4020f2d7 AD |
966 | mmc->ops = &tifm_sd_ops; |
967 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
23af6039 | 968 | mmc->caps = MMC_CAP_4_BIT_DATA; |
4020f2d7 AD |
969 | mmc->f_min = 20000000 / 60; |
970 | mmc->f_max = 24000000; | |
13cdf48e AD |
971 | |
972 | mmc->max_blk_count = 2048; | |
a36274e0 | 973 | mmc->max_segs = mmc->max_blk_count; |
13cdf48e AD |
974 | mmc->max_blk_size = min(TIFM_MMCSD_MAX_BLOCK_SIZE, PAGE_SIZE); |
975 | mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size; | |
976 | mmc->max_req_size = mmc->max_seg_size; | |
13cdf48e | 977 | |
4552f0cb AD |
978 | sock->card_event = tifm_sd_card_event; |
979 | sock->data_event = tifm_sd_data_event; | |
8e02f858 | 980 | rc = tifm_sd_initialize_host(host); |
4020f2d7 | 981 | |
8e02f858 AD |
982 | if (!rc) |
983 | rc = mmc_add_host(mmc); | |
91f8d011 AD |
984 | if (!rc) |
985 | return 0; | |
4020f2d7 | 986 | |
8e02f858 | 987 | mmc_free_host(mmc); |
4020f2d7 AD |
988 | return rc; |
989 | } | |
990 | ||
991 | static void tifm_sd_remove(struct tifm_dev *sock) | |
992 | { | |
993 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
994 | struct tifm_sd *host = mmc_priv(mmc); | |
b039d4a1 | 995 | unsigned long flags; |
4020f2d7 | 996 | |
592d372a | 997 | spin_lock_irqsave(&sock->lock, flags); |
0007d483 | 998 | host->eject = 1; |
b039d4a1 | 999 | writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); |
592d372a AD |
1000 | spin_unlock_irqrestore(&sock->lock, flags); |
1001 | ||
1002 | tasklet_kill(&host->finish_tasklet); | |
1003 | ||
b039d4a1 | 1004 | spin_lock_irqsave(&sock->lock, flags); |
b039d4a1 AD |
1005 | if (host->req) { |
1006 | writel(TIFM_FIFO_INT_SETALL, | |
1007 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
1008 | writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); | |
17b0429d | 1009 | host->req->cmd->error = -ENOMEDIUM; |
592d372a | 1010 | if (host->req->stop) |
17b0429d | 1011 | host->req->stop->error = -ENOMEDIUM; |
b039d4a1 AD |
1012 | tasklet_schedule(&host->finish_tasklet); |
1013 | } | |
1014 | spin_unlock_irqrestore(&sock->lock, flags); | |
8e02f858 | 1015 | mmc_remove_host(mmc); |
592d372a | 1016 | dev_dbg(&sock->dev, "after remove\n"); |
4020f2d7 | 1017 | |
4020f2d7 AD |
1018 | mmc_free_host(mmc); |
1019 | } | |
1020 | ||
dba4acca AD |
1021 | #ifdef CONFIG_PM |
1022 | ||
1023 | static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state) | |
1024 | { | |
ccbd4830 | 1025 | return 0; |
dba4acca AD |
1026 | } |
1027 | ||
1028 | static int tifm_sd_resume(struct tifm_dev *sock) | |
1029 | { | |
1030 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
1031 | struct tifm_sd *host = mmc_priv(mmc); | |
5897d657 | 1032 | int rc; |
dba4acca | 1033 | |
5897d657 AD |
1034 | rc = tifm_sd_initialize_host(host); |
1035 | dev_dbg(&sock->dev, "resume initialize %d\n", rc); | |
1036 | ||
1037 | if (rc) | |
1038 | host->eject = 1; | |
5897d657 AD |
1039 | |
1040 | return rc; | |
dba4acca AD |
1041 | } |
1042 | ||
1043 | #else | |
1044 | ||
1045 | #define tifm_sd_suspend NULL | |
1046 | #define tifm_sd_resume NULL | |
1047 | ||
1048 | #endif /* CONFIG_PM */ | |
1049 | ||
e23f2b8a AD |
1050 | static struct tifm_device_id tifm_sd_id_tbl[] = { |
1051 | { TIFM_TYPE_SD }, { } | |
4020f2d7 AD |
1052 | }; |
1053 | ||
1054 | static struct tifm_driver tifm_sd_driver = { | |
1055 | .driver = { | |
1056 | .name = DRIVER_NAME, | |
1057 | .owner = THIS_MODULE | |
1058 | }, | |
1059 | .id_table = tifm_sd_id_tbl, | |
1060 | .probe = tifm_sd_probe, | |
dba4acca AD |
1061 | .remove = tifm_sd_remove, |
1062 | .suspend = tifm_sd_suspend, | |
1063 | .resume = tifm_sd_resume | |
4020f2d7 AD |
1064 | }; |
1065 | ||
1066 | static int __init tifm_sd_init(void) | |
1067 | { | |
1068 | return tifm_register_driver(&tifm_sd_driver); | |
1069 | } | |
1070 | ||
1071 | static void __exit tifm_sd_exit(void) | |
1072 | { | |
1073 | tifm_unregister_driver(&tifm_sd_driver); | |
1074 | } | |
1075 | ||
1076 | MODULE_AUTHOR("Alex Dubov"); | |
1077 | MODULE_DESCRIPTION("TI FlashMedia SD driver"); | |
1078 | MODULE_LICENSE("GPL"); | |
1079 | MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); | |
1080 | MODULE_VERSION(DRIVER_VERSION); | |
1081 | ||
1082 | module_init(tifm_sd_init); | |
1083 | module_exit(tifm_sd_exit); |