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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 | * | |
10 | */ | |
11 | ||
12 | ||
13 | #include <linux/tifm.h> | |
14 | #include <linux/mmc/protocol.h> | |
15 | #include <linux/mmc/host.h> | |
16 | #include <linux/highmem.h> | |
17 | ||
18 | #define DRIVER_NAME "tifm_sd" | |
19 | #define DRIVER_VERSION "0.6" | |
20 | ||
21 | static int no_dma = 0; | |
22 | static int fixed_timeout = 0; | |
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 | ||
38 | #define TIFM_MMCSD_DATAMASK 0x001d /* set bits: EOFB, BRS, CB, EOC */ | |
39 | #define TIFM_MMCSD_ERRMASK 0x41e0 /* set bits: CERR, CCRC, CTO, DCRC, DTO */ | |
40 | #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */ | |
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 */ | |
50 | #define TIFM_MMCSD_CERR 0x4000 /* card status error */ | |
51 | ||
52 | #define TIFM_MMCSD_FIFO_SIZE 0x0020 | |
53 | ||
54 | #define TIFM_MMCSD_RSP_R0 0x0000 | |
55 | #define TIFM_MMCSD_RSP_R1 0x0100 | |
56 | #define TIFM_MMCSD_RSP_R2 0x0200 | |
57 | #define TIFM_MMCSD_RSP_R3 0x0300 | |
58 | #define TIFM_MMCSD_RSP_R4 0x0400 | |
59 | #define TIFM_MMCSD_RSP_R5 0x0500 | |
60 | #define TIFM_MMCSD_RSP_R6 0x0600 | |
61 | ||
62 | #define TIFM_MMCSD_RSP_BUSY 0x0800 | |
63 | ||
64 | #define TIFM_MMCSD_CMD_BC 0x0000 | |
65 | #define TIFM_MMCSD_CMD_BCR 0x1000 | |
66 | #define TIFM_MMCSD_CMD_AC 0x2000 | |
67 | #define TIFM_MMCSD_CMD_ADTC 0x3000 | |
68 | ||
69 | typedef enum { | |
70 | IDLE = 0, | |
71 | CMD, /* main command ended */ | |
72 | BRS, /* block transfer finished */ | |
73 | SCMD, /* stop command ended */ | |
74 | CARD, /* card left busy state */ | |
75 | FIFO, /* FIFO operation completed (uncertain) */ | |
76 | READY | |
77 | } card_state_t; | |
78 | ||
79 | enum { | |
80 | FIFO_RDY = 0x0001, /* hardware dependent value */ | |
81 | HOST_REG = 0x0002, | |
82 | EJECT = 0x0004, | |
83 | EJECT_DONE = 0x0008, | |
84 | CARD_BUSY = 0x0010, | |
85 | OPENDRAIN = 0x0040, /* hardware dependent value */ | |
86 | CARD_EVENT = 0x0100, /* hardware dependent value */ | |
87 | CARD_RO = 0x0200, /* hardware dependent value */ | |
88 | FIFO_EVENT = 0x10000 }; /* hardware dependent value */ | |
89 | ||
90 | struct tifm_sd { | |
91 | struct tifm_dev *dev; | |
92 | ||
93 | unsigned int flags; | |
94 | card_state_t state; | |
95 | unsigned int clk_freq; | |
96 | unsigned int clk_div; | |
97 | unsigned long timeout_jiffies; // software timeout - 2 sec | |
98 | ||
99 | struct mmc_request *req; | |
100 | struct work_struct cmd_handler; | |
101 | struct work_struct abort_handler; | |
102 | wait_queue_head_t can_eject; | |
103 | ||
104 | size_t written_blocks; | |
105 | char *buffer; | |
106 | size_t buffer_size; | |
107 | size_t buffer_pos; | |
108 | ||
109 | }; | |
110 | ||
111 | static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host, | |
112 | unsigned int host_status) | |
113 | { | |
114 | struct mmc_command *cmd = host->req->cmd; | |
115 | unsigned int t_val = 0, cnt = 0; | |
116 | ||
117 | if (host_status & TIFM_MMCSD_BRS) { | |
118 | /* in non-dma rx mode BRS fires when fifo is still not empty */ | |
119 | if (host->buffer && (cmd->data->flags & MMC_DATA_READ)) { | |
120 | while (host->buffer_size > host->buffer_pos) { | |
121 | t_val = readl(sock->addr + SOCK_MMCSD_DATA); | |
122 | host->buffer[host->buffer_pos++] = t_val & 0xff; | |
123 | host->buffer[host->buffer_pos++] = | |
124 | (t_val >> 8) & 0xff; | |
125 | } | |
126 | } | |
127 | return 1; | |
128 | } else if (host->buffer) { | |
129 | if ((cmd->data->flags & MMC_DATA_READ) && | |
130 | (host_status & TIFM_MMCSD_AF)) { | |
131 | for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { | |
132 | t_val = readl(sock->addr + SOCK_MMCSD_DATA); | |
133 | if (host->buffer_size > host->buffer_pos) { | |
134 | host->buffer[host->buffer_pos++] = | |
135 | t_val & 0xff; | |
136 | host->buffer[host->buffer_pos++] = | |
137 | (t_val >> 8) & 0xff; | |
138 | } | |
139 | } | |
140 | } else if ((cmd->data->flags & MMC_DATA_WRITE) | |
141 | && (host_status & TIFM_MMCSD_AE)) { | |
142 | for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) { | |
143 | if (host->buffer_size > host->buffer_pos) { | |
144 | t_val = host->buffer[host->buffer_pos++] & 0x00ff; | |
145 | t_val |= ((host->buffer[host->buffer_pos++]) << 8) | |
146 | & 0xff00; | |
147 | writel(t_val, | |
148 | sock->addr + SOCK_MMCSD_DATA); | |
149 | } | |
150 | } | |
151 | } | |
152 | } | |
153 | return 0; | |
154 | } | |
155 | ||
156 | static unsigned int tifm_sd_op_flags(struct mmc_command *cmd) | |
157 | { | |
158 | unsigned int rc = 0; | |
159 | ||
160 | switch (mmc_resp_type(cmd)) { | |
161 | case MMC_RSP_NONE: | |
162 | rc |= TIFM_MMCSD_RSP_R0; | |
163 | break; | |
164 | case MMC_RSP_R1B: | |
165 | rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through | |
166 | case MMC_RSP_R1: | |
167 | rc |= TIFM_MMCSD_RSP_R1; | |
168 | break; | |
169 | case MMC_RSP_R2: | |
170 | rc |= TIFM_MMCSD_RSP_R2; | |
171 | break; | |
172 | case MMC_RSP_R3: | |
173 | rc |= TIFM_MMCSD_RSP_R3; | |
174 | break; | |
175 | case MMC_RSP_R6: | |
176 | rc |= TIFM_MMCSD_RSP_R6; | |
177 | break; | |
178 | default: | |
179 | BUG(); | |
180 | } | |
181 | ||
182 | switch (mmc_cmd_type(cmd)) { | |
183 | case MMC_CMD_BC: | |
184 | rc |= TIFM_MMCSD_CMD_BC; | |
185 | break; | |
186 | case MMC_CMD_BCR: | |
187 | rc |= TIFM_MMCSD_CMD_BCR; | |
188 | break; | |
189 | case MMC_CMD_AC: | |
190 | rc |= TIFM_MMCSD_CMD_AC; | |
191 | break; | |
192 | case MMC_CMD_ADTC: | |
193 | rc |= TIFM_MMCSD_CMD_ADTC; | |
194 | break; | |
195 | default: | |
196 | BUG(); | |
197 | } | |
198 | return rc; | |
199 | } | |
200 | ||
201 | static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd) | |
202 | { | |
203 | struct tifm_dev *sock = host->dev; | |
204 | unsigned int cmd_mask = tifm_sd_op_flags(cmd) | | |
205 | (host->flags & OPENDRAIN); | |
206 | ||
207 | if (cmd->data && (cmd->data->flags & MMC_DATA_READ)) | |
208 | cmd_mask |= TIFM_MMCSD_READ; | |
209 | ||
210 | dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n", | |
211 | cmd->opcode, cmd->arg, cmd_mask); | |
212 | ||
213 | writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH); | |
214 | writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW); | |
215 | writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND); | |
216 | } | |
217 | ||
218 | static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock) | |
219 | { | |
220 | cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16) | |
221 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18); | |
222 | cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16) | |
223 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10); | |
224 | cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16) | |
225 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08); | |
226 | cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16) | |
227 | | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00); | |
228 | } | |
229 | ||
230 | static void tifm_sd_process_cmd(struct tifm_dev *sock, struct tifm_sd *host, | |
231 | unsigned int host_status) | |
232 | { | |
233 | struct mmc_command *cmd = host->req->cmd; | |
234 | ||
235 | change_state: | |
236 | switch (host->state) { | |
237 | case IDLE: | |
238 | return; | |
239 | case CMD: | |
240 | if (host_status & TIFM_MMCSD_EOC) { | |
241 | tifm_sd_fetch_resp(cmd, sock); | |
242 | if (cmd->data) { | |
243 | host->state = BRS; | |
244 | } else | |
245 | host->state = READY; | |
246 | goto change_state; | |
247 | } | |
248 | break; | |
249 | case BRS: | |
250 | if (tifm_sd_transfer_data(sock, host, host_status)) { | |
251 | if (!host->req->stop) { | |
252 | if (cmd->data->flags & MMC_DATA_WRITE) { | |
253 | host->state = CARD; | |
254 | } else { | |
255 | host->state = | |
256 | host->buffer ? READY : FIFO; | |
257 | } | |
258 | goto change_state; | |
259 | } | |
260 | tifm_sd_exec(host, host->req->stop); | |
261 | host->state = SCMD; | |
262 | } | |
263 | break; | |
264 | case SCMD: | |
265 | if (host_status & TIFM_MMCSD_EOC) { | |
266 | tifm_sd_fetch_resp(host->req->stop, sock); | |
267 | if (cmd->error) { | |
268 | host->state = READY; | |
269 | } else if (cmd->data->flags & MMC_DATA_WRITE) { | |
270 | host->state = CARD; | |
271 | } else { | |
272 | host->state = host->buffer ? READY : FIFO; | |
273 | } | |
274 | goto change_state; | |
275 | } | |
276 | break; | |
277 | case CARD: | |
278 | if (!(host->flags & CARD_BUSY) | |
279 | && (host->written_blocks == cmd->data->blocks)) { | |
280 | host->state = host->buffer ? READY : FIFO; | |
281 | goto change_state; | |
282 | } | |
283 | break; | |
284 | case FIFO: | |
285 | if (host->flags & FIFO_RDY) { | |
286 | host->state = READY; | |
287 | host->flags &= ~FIFO_RDY; | |
288 | goto change_state; | |
289 | } | |
290 | break; | |
291 | case READY: | |
292 | queue_work(sock->wq, &host->cmd_handler); | |
293 | return; | |
294 | } | |
295 | ||
296 | queue_delayed_work(sock->wq, &host->abort_handler, | |
297 | host->timeout_jiffies); | |
298 | } | |
299 | ||
300 | /* Called from interrupt handler */ | |
301 | static unsigned int tifm_sd_signal_irq(struct tifm_dev *sock, | |
302 | unsigned int sock_irq_status) | |
303 | { | |
304 | struct tifm_sd *host; | |
305 | unsigned int host_status = 0, fifo_status = 0; | |
306 | int error_code = 0; | |
307 | ||
308 | spin_lock(&sock->lock); | |
309 | host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock)); | |
310 | cancel_delayed_work(&host->abort_handler); | |
311 | ||
312 | if (sock_irq_status & FIFO_EVENT) { | |
313 | fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS); | |
314 | writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS); | |
315 | ||
316 | host->flags |= fifo_status & FIFO_RDY; | |
317 | } | |
318 | ||
319 | if (sock_irq_status & CARD_EVENT) { | |
320 | host_status = readl(sock->addr + SOCK_MMCSD_STATUS); | |
321 | writel(host_status, sock->addr + SOCK_MMCSD_STATUS); | |
322 | ||
323 | if (!(host->flags & HOST_REG)) | |
324 | queue_work(sock->wq, &host->cmd_handler); | |
325 | if (!host->req) | |
326 | goto done; | |
327 | ||
328 | if (host_status & TIFM_MMCSD_ERRMASK) { | |
329 | if (host_status & TIFM_MMCSD_CERR) | |
330 | error_code = MMC_ERR_FAILED; | |
331 | else if (host_status & | |
332 | (TIFM_MMCSD_CTO | TIFM_MMCSD_DTO)) | |
333 | error_code = MMC_ERR_TIMEOUT; | |
334 | else if (host_status & | |
335 | (TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC)) | |
336 | error_code = MMC_ERR_BADCRC; | |
337 | ||
338 | writel(TIFM_FIFO_INT_SETALL, | |
339 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
340 | writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL); | |
341 | ||
342 | if (host->req->stop) { | |
343 | if (host->state == SCMD) { | |
344 | host->req->stop->error = error_code; | |
345 | } else if(host->state == BRS) { | |
346 | host->req->cmd->error = error_code; | |
347 | tifm_sd_exec(host, host->req->stop); | |
348 | queue_delayed_work(sock->wq, | |
349 | &host->abort_handler, | |
350 | host->timeout_jiffies); | |
351 | host->state = SCMD; | |
352 | goto done; | |
353 | } else { | |
354 | host->req->cmd->error = error_code; | |
355 | } | |
356 | } else { | |
357 | host->req->cmd->error = error_code; | |
358 | } | |
359 | host->state = READY; | |
360 | } | |
361 | ||
362 | if (host_status & TIFM_MMCSD_CB) | |
363 | host->flags |= CARD_BUSY; | |
364 | if ((host_status & TIFM_MMCSD_EOFB) && | |
365 | (host->flags & CARD_BUSY)) { | |
366 | host->written_blocks++; | |
367 | host->flags &= ~CARD_BUSY; | |
368 | } | |
369 | } | |
370 | ||
371 | if (host->req) | |
372 | tifm_sd_process_cmd(sock, host, host_status); | |
373 | done: | |
374 | dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n", | |
375 | host_status, fifo_status); | |
376 | spin_unlock(&sock->lock); | |
377 | return sock_irq_status; | |
378 | } | |
379 | ||
380 | static void tifm_sd_prepare_data(struct tifm_sd *card, struct mmc_command *cmd) | |
381 | { | |
382 | struct tifm_dev *sock = card->dev; | |
383 | unsigned int dest_cnt; | |
384 | ||
385 | /* DMA style IO */ | |
386 | ||
387 | writel(TIFM_FIFO_INT_SETALL, | |
388 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
389 | writel(long_log2(cmd->data->blksz) - 2, | |
390 | sock->addr + SOCK_FIFO_PAGE_SIZE); | |
391 | writel(TIFM_FIFO_ENABLE, sock->addr + SOCK_FIFO_CONTROL); | |
392 | writel(TIFM_FIFO_INTMASK, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); | |
393 | ||
394 | dest_cnt = (cmd->data->blocks) << 8; | |
395 | ||
396 | writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS); | |
397 | ||
398 | writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
399 | writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); | |
400 | ||
401 | if (cmd->data->flags & MMC_DATA_WRITE) { | |
402 | writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
403 | writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN, | |
404 | sock->addr + SOCK_DMA_CONTROL); | |
405 | } else { | |
406 | writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
407 | writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL); | |
408 | } | |
409 | } | |
410 | ||
411 | static void tifm_sd_set_data_timeout(struct tifm_sd *host, | |
412 | struct mmc_data *data) | |
413 | { | |
414 | struct tifm_dev *sock = host->dev; | |
415 | unsigned int data_timeout = data->timeout_clks; | |
416 | ||
417 | if (fixed_timeout) | |
418 | return; | |
419 | ||
420 | data_timeout += data->timeout_ns / | |
421 | ((1000000000 / host->clk_freq) * host->clk_div); | |
422 | data_timeout *= 10; // call it fudge factor for now | |
423 | ||
424 | if (data_timeout < 0xffff) { | |
425 | writel((~TIFM_MMCSD_DPE) & | |
426 | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), | |
427 | sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); | |
428 | writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); | |
429 | } else { | |
430 | writel(TIFM_MMCSD_DPE | | |
431 | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG), | |
432 | sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG); | |
433 | data_timeout = (data_timeout >> 10) + 1; | |
434 | if(data_timeout > 0xffff) | |
435 | data_timeout = 0; /* set to unlimited */ | |
436 | writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO); | |
437 | } | |
438 | } | |
439 | ||
440 | static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
441 | { | |
442 | struct tifm_sd *host = mmc_priv(mmc); | |
443 | struct tifm_dev *sock = host->dev; | |
444 | unsigned long flags; | |
445 | int sg_count = 0; | |
446 | struct mmc_data *r_data = mrq->cmd->data; | |
447 | ||
448 | spin_lock_irqsave(&sock->lock, flags); | |
449 | if (host->flags & EJECT) { | |
450 | spin_unlock_irqrestore(&sock->lock, flags); | |
451 | goto err_out; | |
452 | } | |
453 | ||
454 | if (host->req) { | |
455 | printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); | |
456 | spin_unlock_irqrestore(&sock->lock, flags); | |
457 | goto err_out; | |
458 | } | |
459 | ||
460 | if (r_data) { | |
461 | tifm_sd_set_data_timeout(host, r_data); | |
462 | ||
463 | sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len, | |
464 | mrq->cmd->flags & MMC_DATA_WRITE | |
465 | ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
466 | if (sg_count != 1) { | |
467 | printk(KERN_ERR DRIVER_NAME | |
468 | ": scatterlist map failed\n"); | |
469 | spin_unlock_irqrestore(&sock->lock, flags); | |
470 | goto err_out; | |
471 | } | |
472 | ||
473 | host->written_blocks = 0; | |
474 | host->flags &= ~CARD_BUSY; | |
475 | tifm_sd_prepare_data(host, mrq->cmd); | |
476 | } | |
477 | ||
478 | host->req = mrq; | |
479 | host->state = CMD; | |
480 | queue_delayed_work(sock->wq, &host->abort_handler, | |
481 | host->timeout_jiffies); | |
482 | writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), | |
483 | sock->addr + SOCK_CONTROL); | |
484 | tifm_sd_exec(host, mrq->cmd); | |
485 | spin_unlock_irqrestore(&sock->lock, flags); | |
486 | return; | |
487 | ||
488 | err_out: | |
489 | if (sg_count > 0) | |
490 | tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, | |
491 | (r_data->flags & MMC_DATA_WRITE) | |
492 | ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
493 | ||
494 | mrq->cmd->error = MMC_ERR_TIMEOUT; | |
495 | mmc_request_done(mmc, mrq); | |
496 | } | |
497 | ||
498 | static void tifm_sd_end_cmd(void *data) | |
499 | { | |
500 | struct tifm_sd *host = data; | |
501 | struct tifm_dev *sock = host->dev; | |
502 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
503 | struct mmc_request *mrq; | |
e069d79d | 504 | struct mmc_data *r_data = NULL; |
4020f2d7 AD |
505 | unsigned long flags; |
506 | ||
507 | spin_lock_irqsave(&sock->lock, flags); | |
508 | ||
509 | mrq = host->req; | |
e069d79d | 510 | host->req = NULL; |
4020f2d7 AD |
511 | host->state = IDLE; |
512 | ||
513 | if (!mrq) { | |
514 | printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); | |
515 | spin_unlock_irqrestore(&sock->lock, flags); | |
516 | return; | |
517 | } | |
518 | ||
519 | r_data = mrq->cmd->data; | |
520 | if (r_data) { | |
521 | if (r_data->flags & MMC_DATA_WRITE) { | |
522 | r_data->bytes_xfered = host->written_blocks * | |
523 | r_data->blksz; | |
524 | } else { | |
525 | r_data->bytes_xfered = r_data->blocks - | |
526 | readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; | |
527 | r_data->bytes_xfered *= r_data->blksz; | |
528 | r_data->bytes_xfered += r_data->blksz - | |
529 | readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; | |
530 | } | |
531 | tifm_unmap_sg(sock, r_data->sg, r_data->sg_len, | |
532 | (r_data->flags & MMC_DATA_WRITE) | |
533 | ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
534 | } | |
535 | ||
536 | writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), | |
537 | sock->addr + SOCK_CONTROL); | |
538 | ||
539 | spin_unlock_irqrestore(&sock->lock, flags); | |
540 | mmc_request_done(mmc, mrq); | |
541 | } | |
542 | ||
543 | static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq) | |
544 | { | |
545 | struct tifm_sd *host = mmc_priv(mmc); | |
546 | struct tifm_dev *sock = host->dev; | |
547 | unsigned long flags; | |
548 | struct mmc_data *r_data = mrq->cmd->data; | |
e069d79d | 549 | char *t_buffer = NULL; |
4020f2d7 AD |
550 | |
551 | if (r_data) { | |
552 | t_buffer = kmap(r_data->sg->page); | |
553 | if (!t_buffer) { | |
554 | printk(KERN_ERR DRIVER_NAME ": kmap failed\n"); | |
555 | goto err_out; | |
556 | } | |
557 | } | |
558 | ||
559 | spin_lock_irqsave(&sock->lock, flags); | |
560 | if (host->flags & EJECT) { | |
561 | spin_unlock_irqrestore(&sock->lock, flags); | |
562 | goto err_out; | |
563 | } | |
564 | ||
565 | if (host->req) { | |
566 | printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n"); | |
567 | spin_unlock_irqrestore(&sock->lock, flags); | |
568 | goto err_out; | |
569 | } | |
570 | ||
571 | if (r_data) { | |
572 | tifm_sd_set_data_timeout(host, r_data); | |
573 | ||
574 | host->buffer = t_buffer + r_data->sg->offset; | |
575 | host->buffer_size = mrq->cmd->data->blocks * | |
576 | mrq->cmd->data->blksz; | |
577 | ||
578 | writel(TIFM_MMCSD_BUFINT | | |
579 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
580 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
581 | writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8) | | |
582 | (TIFM_MMCSD_FIFO_SIZE - 1), | |
583 | sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
584 | ||
585 | host->written_blocks = 0; | |
586 | host->flags &= ~CARD_BUSY; | |
587 | host->buffer_pos = 0; | |
588 | writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
589 | writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN); | |
590 | } | |
591 | ||
592 | host->req = mrq; | |
593 | host->state = CMD; | |
594 | queue_delayed_work(sock->wq, &host->abort_handler, | |
595 | host->timeout_jiffies); | |
596 | writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL), | |
597 | sock->addr + SOCK_CONTROL); | |
598 | tifm_sd_exec(host, mrq->cmd); | |
599 | spin_unlock_irqrestore(&sock->lock, flags); | |
600 | return; | |
601 | ||
602 | err_out: | |
603 | if (t_buffer) | |
604 | kunmap(r_data->sg->page); | |
605 | ||
606 | mrq->cmd->error = MMC_ERR_TIMEOUT; | |
607 | mmc_request_done(mmc, mrq); | |
608 | } | |
609 | ||
610 | static void tifm_sd_end_cmd_nodma(void *data) | |
611 | { | |
612 | struct tifm_sd *host = (struct tifm_sd*)data; | |
613 | struct tifm_dev *sock = host->dev; | |
614 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
615 | struct mmc_request *mrq; | |
e069d79d | 616 | struct mmc_data *r_data = NULL; |
4020f2d7 AD |
617 | unsigned long flags; |
618 | ||
619 | spin_lock_irqsave(&sock->lock, flags); | |
620 | ||
621 | mrq = host->req; | |
e069d79d | 622 | host->req = NULL; |
4020f2d7 AD |
623 | host->state = IDLE; |
624 | ||
625 | if (!mrq) { | |
626 | printk(KERN_ERR DRIVER_NAME ": no request to complete?\n"); | |
627 | spin_unlock_irqrestore(&sock->lock, flags); | |
628 | return; | |
629 | } | |
630 | ||
631 | r_data = mrq->cmd->data; | |
632 | if (r_data) { | |
633 | writel((~TIFM_MMCSD_BUFINT) & | |
634 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE), | |
635 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
636 | ||
637 | if (r_data->flags & MMC_DATA_WRITE) { | |
638 | r_data->bytes_xfered = host->written_blocks * | |
639 | r_data->blksz; | |
640 | } else { | |
641 | r_data->bytes_xfered = r_data->blocks - | |
642 | readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1; | |
643 | r_data->bytes_xfered *= r_data->blksz; | |
644 | r_data->bytes_xfered += r_data->blksz - | |
645 | readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1; | |
646 | } | |
e069d79d | 647 | host->buffer = NULL; |
4020f2d7 AD |
648 | host->buffer_pos = 0; |
649 | host->buffer_size = 0; | |
650 | } | |
651 | ||
652 | writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL), | |
653 | sock->addr + SOCK_CONTROL); | |
654 | ||
655 | spin_unlock_irqrestore(&sock->lock, flags); | |
656 | ||
657 | if (r_data) | |
658 | kunmap(r_data->sg->page); | |
659 | ||
660 | mmc_request_done(mmc, mrq); | |
661 | } | |
662 | ||
663 | static void tifm_sd_abort(void *data) | |
664 | { | |
665 | printk(KERN_ERR DRIVER_NAME | |
666 | ": card failed to respond for a long period of time"); | |
667 | tifm_eject(((struct tifm_sd*)data)->dev); | |
668 | } | |
669 | ||
670 | static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
671 | { | |
672 | struct tifm_sd *host = mmc_priv(mmc); | |
673 | struct tifm_dev *sock = host->dev; | |
674 | unsigned int clk_div1, clk_div2; | |
675 | unsigned long flags; | |
676 | ||
677 | spin_lock_irqsave(&sock->lock, flags); | |
678 | ||
679 | dev_dbg(&sock->dev, "Setting bus width %d, power %d\n", ios->bus_width, | |
680 | ios->power_mode); | |
681 | if (ios->bus_width == MMC_BUS_WIDTH_4) { | |
682 | writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG), | |
683 | sock->addr + SOCK_MMCSD_CONFIG); | |
684 | } else { | |
685 | writel((~TIFM_MMCSD_4BBUS) & | |
686 | readl(sock->addr + SOCK_MMCSD_CONFIG), | |
687 | sock->addr + SOCK_MMCSD_CONFIG); | |
688 | } | |
689 | ||
690 | if (ios->clock) { | |
691 | clk_div1 = 20000000 / ios->clock; | |
692 | if (!clk_div1) | |
693 | clk_div1 = 1; | |
694 | ||
695 | clk_div2 = 24000000 / ios->clock; | |
696 | if (!clk_div2) | |
697 | clk_div2 = 1; | |
698 | ||
699 | if ((20000000 / clk_div1) > ios->clock) | |
700 | clk_div1++; | |
701 | if ((24000000 / clk_div2) > ios->clock) | |
702 | clk_div2++; | |
703 | if ((20000000 / clk_div1) > (24000000 / clk_div2)) { | |
704 | host->clk_freq = 20000000; | |
705 | host->clk_div = clk_div1; | |
706 | writel((~TIFM_CTRL_FAST_CLK) & | |
707 | readl(sock->addr + SOCK_CONTROL), | |
708 | sock->addr + SOCK_CONTROL); | |
709 | } else { | |
710 | host->clk_freq = 24000000; | |
711 | host->clk_div = clk_div2; | |
712 | writel(TIFM_CTRL_FAST_CLK | | |
713 | readl(sock->addr + SOCK_CONTROL), | |
714 | sock->addr + SOCK_CONTROL); | |
715 | } | |
716 | } else { | |
717 | host->clk_div = 0; | |
718 | } | |
719 | host->clk_div &= TIFM_MMCSD_CLKMASK; | |
720 | writel(host->clk_div | ((~TIFM_MMCSD_CLKMASK) & | |
721 | readl(sock->addr + SOCK_MMCSD_CONFIG)), | |
722 | sock->addr + SOCK_MMCSD_CONFIG); | |
723 | ||
724 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
725 | host->flags |= OPENDRAIN; | |
726 | else | |
727 | host->flags &= ~OPENDRAIN; | |
728 | ||
729 | /* chip_select : maybe later */ | |
730 | //vdd | |
731 | //power is set before probe / after remove | |
732 | //I believe, power_off when already marked for eject is sufficient to | |
733 | // allow removal. | |
734 | if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) { | |
735 | host->flags |= EJECT_DONE; | |
736 | wake_up_all(&host->can_eject); | |
737 | } | |
738 | ||
739 | spin_unlock_irqrestore(&sock->lock, flags); | |
740 | } | |
741 | ||
742 | static int tifm_sd_ro(struct mmc_host *mmc) | |
743 | { | |
744 | int rc; | |
745 | struct tifm_sd *host = mmc_priv(mmc); | |
746 | struct tifm_dev *sock = host->dev; | |
747 | unsigned long flags; | |
748 | ||
749 | spin_lock_irqsave(&sock->lock, flags); | |
750 | ||
751 | host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE)); | |
752 | rc = (host->flags & CARD_RO) ? 1 : 0; | |
753 | ||
754 | spin_unlock_irqrestore(&sock->lock, flags); | |
755 | return rc; | |
756 | } | |
757 | ||
758 | static struct mmc_host_ops tifm_sd_ops = { | |
759 | .request = tifm_sd_request, | |
760 | .set_ios = tifm_sd_ios, | |
761 | .get_ro = tifm_sd_ro | |
762 | }; | |
763 | ||
764 | static void tifm_sd_register_host(void *data) | |
765 | { | |
766 | struct tifm_sd *host = (struct tifm_sd*)data; | |
767 | struct tifm_dev *sock = host->dev; | |
768 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
769 | unsigned long flags; | |
770 | ||
771 | spin_lock_irqsave(&sock->lock, flags); | |
772 | host->flags |= HOST_REG; | |
773 | PREPARE_WORK(&host->cmd_handler, | |
774 | no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd, | |
775 | data); | |
776 | spin_unlock_irqrestore(&sock->lock, flags); | |
777 | dev_dbg(&sock->dev, "adding host\n"); | |
778 | mmc_add_host(mmc); | |
779 | } | |
780 | ||
781 | static int tifm_sd_probe(struct tifm_dev *sock) | |
782 | { | |
783 | struct mmc_host *mmc; | |
784 | struct tifm_sd *host; | |
785 | int rc = -EIO; | |
786 | ||
787 | if (!(TIFM_SOCK_STATE_OCCUPIED & | |
788 | readl(sock->addr + SOCK_PRESENT_STATE))) { | |
789 | printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n"); | |
790 | return rc; | |
791 | } | |
792 | ||
793 | mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev); | |
794 | if (!mmc) | |
795 | return -ENOMEM; | |
796 | ||
797 | host = mmc_priv(mmc); | |
798 | host->dev = sock; | |
799 | host->clk_div = 61; | |
800 | init_waitqueue_head(&host->can_eject); | |
801 | INIT_WORK(&host->cmd_handler, tifm_sd_register_host, host); | |
802 | INIT_WORK(&host->abort_handler, tifm_sd_abort, host); | |
803 | ||
804 | tifm_set_drvdata(sock, mmc); | |
805 | sock->signal_irq = tifm_sd_signal_irq; | |
806 | ||
807 | host->clk_freq = 20000000; | |
808 | host->timeout_jiffies = msecs_to_jiffies(1000); | |
809 | ||
810 | tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request; | |
811 | mmc->ops = &tifm_sd_ops; | |
812 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
813 | mmc->caps = MMC_CAP_4_BIT_DATA; | |
814 | mmc->f_min = 20000000 / 60; | |
815 | mmc->f_max = 24000000; | |
816 | mmc->max_hw_segs = 1; | |
817 | mmc->max_phys_segs = 1; | |
818 | mmc->max_sectors = 127; | |
819 | mmc->max_seg_size = mmc->max_sectors << 11; //2k maximum hw block length | |
820 | ||
821 | writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); | |
822 | writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL); | |
823 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
824 | sock->addr + SOCK_MMCSD_CONFIG); | |
825 | ||
826 | for (rc = 0; rc < 50; rc++) { | |
827 | /* Wait for reset ack */ | |
828 | if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) { | |
829 | rc = 0; | |
830 | break; | |
831 | } | |
832 | msleep(10); | |
833 | } | |
834 | ||
835 | if (rc) { | |
836 | printk(KERN_ERR DRIVER_NAME | |
837 | ": card not ready - probe failed\n"); | |
838 | mmc_free_host(mmc); | |
839 | return -ENODEV; | |
840 | } | |
841 | ||
842 | writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS); | |
843 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
844 | sock->addr + SOCK_MMCSD_CONFIG); | |
845 | writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG); | |
846 | writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK, | |
847 | sock->addr + SOCK_MMCSD_INT_ENABLE); | |
848 | ||
849 | writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO); // command timeout 64 clocks for now | |
850 | writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND); | |
851 | writel(host->clk_div | TIFM_MMCSD_POWER, | |
852 | sock->addr + SOCK_MMCSD_CONFIG); | |
853 | ||
854 | queue_delayed_work(sock->wq, &host->abort_handler, | |
855 | host->timeout_jiffies); | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | static int tifm_sd_host_is_down(struct tifm_dev *sock) | |
861 | { | |
862 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
863 | struct tifm_sd *host = mmc_priv(mmc); | |
864 | unsigned long flags; | |
865 | int rc = 0; | |
866 | ||
867 | spin_lock_irqsave(&sock->lock, flags); | |
868 | rc = (host->flags & EJECT_DONE); | |
869 | spin_unlock_irqrestore(&sock->lock, flags); | |
870 | return rc; | |
871 | } | |
872 | ||
873 | static void tifm_sd_remove(struct tifm_dev *sock) | |
874 | { | |
875 | struct mmc_host *mmc = tifm_get_drvdata(sock); | |
876 | struct tifm_sd *host = mmc_priv(mmc); | |
877 | unsigned long flags; | |
878 | ||
879 | spin_lock_irqsave(&sock->lock, flags); | |
880 | host->flags |= EJECT; | |
881 | if (host->req) | |
882 | queue_work(sock->wq, &host->cmd_handler); | |
883 | spin_unlock_irqrestore(&sock->lock, flags); | |
884 | wait_event_timeout(host->can_eject, tifm_sd_host_is_down(sock), | |
885 | host->timeout_jiffies); | |
886 | ||
887 | if (host->flags & HOST_REG) | |
888 | mmc_remove_host(mmc); | |
889 | ||
890 | /* The meaning of the bit majority in this constant is unknown. */ | |
891 | writel(0xfff8 & readl(sock->addr + SOCK_CONTROL), | |
892 | sock->addr + SOCK_CONTROL); | |
893 | writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE); | |
894 | writel(TIFM_FIFO_INT_SETALL, | |
895 | sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR); | |
896 | writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET); | |
897 | ||
e069d79d | 898 | tifm_set_drvdata(sock, NULL); |
4020f2d7 AD |
899 | mmc_free_host(mmc); |
900 | } | |
901 | ||
902 | static tifm_media_id tifm_sd_id_tbl[] = { | |
903 | FM_SD, 0 | |
904 | }; | |
905 | ||
906 | static struct tifm_driver tifm_sd_driver = { | |
907 | .driver = { | |
908 | .name = DRIVER_NAME, | |
909 | .owner = THIS_MODULE | |
910 | }, | |
911 | .id_table = tifm_sd_id_tbl, | |
912 | .probe = tifm_sd_probe, | |
913 | .remove = tifm_sd_remove | |
914 | }; | |
915 | ||
916 | static int __init tifm_sd_init(void) | |
917 | { | |
918 | return tifm_register_driver(&tifm_sd_driver); | |
919 | } | |
920 | ||
921 | static void __exit tifm_sd_exit(void) | |
922 | { | |
923 | tifm_unregister_driver(&tifm_sd_driver); | |
924 | } | |
925 | ||
926 | MODULE_AUTHOR("Alex Dubov"); | |
927 | MODULE_DESCRIPTION("TI FlashMedia SD driver"); | |
928 | MODULE_LICENSE("GPL"); | |
929 | MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl); | |
930 | MODULE_VERSION(DRIVER_VERSION); | |
931 | ||
932 | module_init(tifm_sd_init); | |
933 | module_exit(tifm_sd_exit); |