diff options
author | Pierre Ossman <drzeus@drzeus.cx> | 2007-02-11 13:57:36 -0500 |
---|---|---|
committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-01 07:04:17 -0400 |
commit | 1c6a0718f0bfdab0d9b7da5f7b74f38a0058c03a (patch) | |
tree | 5e7f2a26d5d1782d87c596b40f874c6c0b8b8e1a /drivers/mmc/imxmmc.c | |
parent | 98ac2162699f7e9880683cb954891817f20b607c (diff) |
mmc: Move host and card drivers to subdirs
Clean up the drivers/mmc directory by moving card and host drivers
into subdirectories.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/imxmmc.c')
-rw-r--r-- | drivers/mmc/imxmmc.c | 1137 |
1 files changed, 0 insertions, 1137 deletions
diff --git a/drivers/mmc/imxmmc.c b/drivers/mmc/imxmmc.c deleted file mode 100644 index 7ee2045acbef..000000000000 --- a/drivers/mmc/imxmmc.c +++ /dev/null | |||
@@ -1,1137 +0,0 @@ | |||
1 | /* | ||
2 | * linux/drivers/mmc/imxmmc.c - Motorola i.MX MMCI driver | ||
3 | * | ||
4 | * Copyright (C) 2004 Sascha Hauer, Pengutronix <sascha@saschahauer.de> | ||
5 | * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com> | ||
6 | * | ||
7 | * derived from pxamci.c by Russell King | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License version 2 as | ||
11 | * published by the Free Software Foundation. | ||
12 | * | ||
13 | * 2005-04-17 Pavel Pisa <pisa@cmp.felk.cvut.cz> | ||
14 | * Changed to conform redesigned i.MX scatter gather DMA interface | ||
15 | * | ||
16 | * 2005-11-04 Pavel Pisa <pisa@cmp.felk.cvut.cz> | ||
17 | * Updated for 2.6.14 kernel | ||
18 | * | ||
19 | * 2005-12-13 Jay Monkman <jtm@smoothsmoothie.com> | ||
20 | * Found and corrected problems in the write path | ||
21 | * | ||
22 | * 2005-12-30 Pavel Pisa <pisa@cmp.felk.cvut.cz> | ||
23 | * The event handling rewritten right way in softirq. | ||
24 | * Added many ugly hacks and delays to overcome SDHC | ||
25 | * deficiencies | ||
26 | * | ||
27 | */ | ||
28 | |||
29 | #ifdef CONFIG_MMC_DEBUG | ||
30 | #define DEBUG | ||
31 | #else | ||
32 | #undef DEBUG | ||
33 | #endif | ||
34 | |||
35 | #include <linux/module.h> | ||
36 | #include <linux/init.h> | ||
37 | #include <linux/ioport.h> | ||
38 | #include <linux/platform_device.h> | ||
39 | #include <linux/interrupt.h> | ||
40 | #include <linux/blkdev.h> | ||
41 | #include <linux/dma-mapping.h> | ||
42 | #include <linux/mmc/host.h> | ||
43 | #include <linux/mmc/card.h> | ||
44 | #include <linux/delay.h> | ||
45 | |||
46 | #include <asm/dma.h> | ||
47 | #include <asm/io.h> | ||
48 | #include <asm/irq.h> | ||
49 | #include <asm/sizes.h> | ||
50 | #include <asm/arch/mmc.h> | ||
51 | #include <asm/arch/imx-dma.h> | ||
52 | |||
53 | #include "imxmmc.h" | ||
54 | |||
55 | #define DRIVER_NAME "imx-mmc" | ||
56 | |||
57 | #define IMXMCI_INT_MASK_DEFAULT (INT_MASK_BUF_READY | INT_MASK_DATA_TRAN | \ | ||
58 | INT_MASK_WRITE_OP_DONE | INT_MASK_END_CMD_RES | \ | ||
59 | INT_MASK_AUTO_CARD_DETECT | INT_MASK_DAT0_EN | INT_MASK_SDIO) | ||
60 | |||
61 | struct imxmci_host { | ||
62 | struct mmc_host *mmc; | ||
63 | spinlock_t lock; | ||
64 | struct resource *res; | ||
65 | int irq; | ||
66 | imx_dmach_t dma; | ||
67 | unsigned int clkrt; | ||
68 | unsigned int cmdat; | ||
69 | volatile unsigned int imask; | ||
70 | unsigned int power_mode; | ||
71 | unsigned int present; | ||
72 | struct imxmmc_platform_data *pdata; | ||
73 | |||
74 | struct mmc_request *req; | ||
75 | struct mmc_command *cmd; | ||
76 | struct mmc_data *data; | ||
77 | |||
78 | struct timer_list timer; | ||
79 | struct tasklet_struct tasklet; | ||
80 | unsigned int status_reg; | ||
81 | unsigned long pending_events; | ||
82 | /* Next to fields are there for CPU driven transfers to overcome SDHC deficiencies */ | ||
83 | u16 *data_ptr; | ||
84 | unsigned int data_cnt; | ||
85 | atomic_t stuck_timeout; | ||
86 | |||
87 | unsigned int dma_nents; | ||
88 | unsigned int dma_size; | ||
89 | unsigned int dma_dir; | ||
90 | int dma_allocated; | ||
91 | |||
92 | unsigned char actual_bus_width; | ||
93 | |||
94 | int prev_cmd_code; | ||
95 | }; | ||
96 | |||
97 | #define IMXMCI_PEND_IRQ_b 0 | ||
98 | #define IMXMCI_PEND_DMA_END_b 1 | ||
99 | #define IMXMCI_PEND_DMA_ERR_b 2 | ||
100 | #define IMXMCI_PEND_WAIT_RESP_b 3 | ||
101 | #define IMXMCI_PEND_DMA_DATA_b 4 | ||
102 | #define IMXMCI_PEND_CPU_DATA_b 5 | ||
103 | #define IMXMCI_PEND_CARD_XCHG_b 6 | ||
104 | #define IMXMCI_PEND_SET_INIT_b 7 | ||
105 | #define IMXMCI_PEND_STARTED_b 8 | ||
106 | |||
107 | #define IMXMCI_PEND_IRQ_m (1 << IMXMCI_PEND_IRQ_b) | ||
108 | #define IMXMCI_PEND_DMA_END_m (1 << IMXMCI_PEND_DMA_END_b) | ||
109 | #define IMXMCI_PEND_DMA_ERR_m (1 << IMXMCI_PEND_DMA_ERR_b) | ||
110 | #define IMXMCI_PEND_WAIT_RESP_m (1 << IMXMCI_PEND_WAIT_RESP_b) | ||
111 | #define IMXMCI_PEND_DMA_DATA_m (1 << IMXMCI_PEND_DMA_DATA_b) | ||
112 | #define IMXMCI_PEND_CPU_DATA_m (1 << IMXMCI_PEND_CPU_DATA_b) | ||
113 | #define IMXMCI_PEND_CARD_XCHG_m (1 << IMXMCI_PEND_CARD_XCHG_b) | ||
114 | #define IMXMCI_PEND_SET_INIT_m (1 << IMXMCI_PEND_SET_INIT_b) | ||
115 | #define IMXMCI_PEND_STARTED_m (1 << IMXMCI_PEND_STARTED_b) | ||
116 | |||
117 | static void imxmci_stop_clock(struct imxmci_host *host) | ||
118 | { | ||
119 | int i = 0; | ||
120 | MMC_STR_STP_CLK &= ~STR_STP_CLK_START_CLK; | ||
121 | while(i < 0x1000) { | ||
122 | if(!(i & 0x7f)) | ||
123 | MMC_STR_STP_CLK |= STR_STP_CLK_STOP_CLK; | ||
124 | |||
125 | if(!(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN)) { | ||
126 | /* Check twice before cut */ | ||
127 | if(!(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN)) | ||
128 | return; | ||
129 | } | ||
130 | |||
131 | i++; | ||
132 | } | ||
133 | dev_dbg(mmc_dev(host->mmc), "imxmci_stop_clock blocked, no luck\n"); | ||
134 | } | ||
135 | |||
136 | static int imxmci_start_clock(struct imxmci_host *host) | ||
137 | { | ||
138 | unsigned int trials = 0; | ||
139 | unsigned int delay_limit = 128; | ||
140 | unsigned long flags; | ||
141 | |||
142 | MMC_STR_STP_CLK &= ~STR_STP_CLK_STOP_CLK; | ||
143 | |||
144 | clear_bit(IMXMCI_PEND_STARTED_b, &host->pending_events); | ||
145 | |||
146 | /* | ||
147 | * Command start of the clock, this usually succeeds in less | ||
148 | * then 6 delay loops, but during card detection (low clockrate) | ||
149 | * it takes up to 5000 delay loops and sometimes fails for the first time | ||
150 | */ | ||
151 | MMC_STR_STP_CLK |= STR_STP_CLK_START_CLK; | ||
152 | |||
153 | do { | ||
154 | unsigned int delay = delay_limit; | ||
155 | |||
156 | while(delay--){ | ||
157 | if(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN) | ||
158 | /* Check twice before cut */ | ||
159 | if(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN) | ||
160 | return 0; | ||
161 | |||
162 | if(test_bit(IMXMCI_PEND_STARTED_b, &host->pending_events)) | ||
163 | return 0; | ||
164 | } | ||
165 | |||
166 | local_irq_save(flags); | ||
167 | /* | ||
168 | * Ensure, that request is not doubled under all possible circumstances. | ||
169 | * It is possible, that cock running state is missed, because some other | ||
170 | * IRQ or schedule delays this function execution and the clocks has | ||
171 | * been already stopped by other means (response processing, SDHC HW) | ||
172 | */ | ||
173 | if(!test_bit(IMXMCI_PEND_STARTED_b, &host->pending_events)) | ||
174 | MMC_STR_STP_CLK |= STR_STP_CLK_START_CLK; | ||
175 | local_irq_restore(flags); | ||
176 | |||
177 | } while(++trials<256); | ||
178 | |||
179 | dev_err(mmc_dev(host->mmc), "imxmci_start_clock blocked, no luck\n"); | ||
180 | |||
181 | return -1; | ||
182 | } | ||
183 | |||
184 | static void imxmci_softreset(void) | ||
185 | { | ||
186 | /* reset sequence */ | ||
187 | MMC_STR_STP_CLK = 0x8; | ||
188 | MMC_STR_STP_CLK = 0xD; | ||
189 | MMC_STR_STP_CLK = 0x5; | ||
190 | MMC_STR_STP_CLK = 0x5; | ||
191 | MMC_STR_STP_CLK = 0x5; | ||
192 | MMC_STR_STP_CLK = 0x5; | ||
193 | MMC_STR_STP_CLK = 0x5; | ||
194 | MMC_STR_STP_CLK = 0x5; | ||
195 | MMC_STR_STP_CLK = 0x5; | ||
196 | MMC_STR_STP_CLK = 0x5; | ||
197 | |||
198 | MMC_RES_TO = 0xff; | ||
199 | MMC_BLK_LEN = 512; | ||
200 | MMC_NOB = 1; | ||
201 | } | ||
202 | |||
203 | static int imxmci_busy_wait_for_status(struct imxmci_host *host, | ||
204 | unsigned int *pstat, unsigned int stat_mask, | ||
205 | int timeout, const char *where) | ||
206 | { | ||
207 | int loops=0; | ||
208 | while(!(*pstat & stat_mask)) { | ||
209 | loops+=2; | ||
210 | if(loops >= timeout) { | ||
211 | dev_dbg(mmc_dev(host->mmc), "busy wait timeout in %s, STATUS = 0x%x (0x%x)\n", | ||
212 | where, *pstat, stat_mask); | ||
213 | return -1; | ||
214 | } | ||
215 | udelay(2); | ||
216 | *pstat |= MMC_STATUS; | ||
217 | } | ||
218 | if(!loops) | ||
219 | return 0; | ||
220 | |||
221 | /* The busy-wait is expected there for clock <8MHz due to SDHC hardware flaws */ | ||
222 | if(!(stat_mask & STATUS_END_CMD_RESP) || (host->mmc->ios.clock>=8000000)) | ||
223 | dev_info(mmc_dev(host->mmc), "busy wait for %d usec in %s, STATUS = 0x%x (0x%x)\n", | ||
224 | loops, where, *pstat, stat_mask); | ||
225 | return loops; | ||
226 | } | ||
227 | |||
228 | static void imxmci_setup_data(struct imxmci_host *host, struct mmc_data *data) | ||
229 | { | ||
230 | unsigned int nob = data->blocks; | ||
231 | unsigned int blksz = data->blksz; | ||
232 | unsigned int datasz = nob * blksz; | ||
233 | int i; | ||
234 | |||
235 | if (data->flags & MMC_DATA_STREAM) | ||
236 | nob = 0xffff; | ||
237 | |||
238 | host->data = data; | ||
239 | data->bytes_xfered = 0; | ||
240 | |||
241 | MMC_NOB = nob; | ||
242 | MMC_BLK_LEN = blksz; | ||
243 | |||
244 | /* | ||
245 | * DMA cannot be used for small block sizes, we have to use CPU driven transfers otherwise. | ||
246 | * We are in big troubles for non-512 byte transfers according to note in the paragraph | ||
247 | * 20.6.7 of User Manual anyway, but we need to be able to transfer SCR at least. | ||
248 | * The situation is even more complex in reality. The SDHC in not able to handle wll | ||
249 | * partial FIFO fills and reads. The length has to be rounded up to burst size multiple. | ||
250 | * This is required for SCR read at least. | ||
251 | */ | ||
252 | if (datasz < 512) { | ||
253 | host->dma_size = datasz; | ||
254 | if (data->flags & MMC_DATA_READ) { | ||
255 | host->dma_dir = DMA_FROM_DEVICE; | ||
256 | |||
257 | /* Hack to enable read SCR */ | ||
258 | MMC_NOB = 1; | ||
259 | MMC_BLK_LEN = 512; | ||
260 | } else { | ||
261 | host->dma_dir = DMA_TO_DEVICE; | ||
262 | } | ||
263 | |||
264 | /* Convert back to virtual address */ | ||
265 | host->data_ptr = (u16*)(page_address(data->sg->page) + data->sg->offset); | ||
266 | host->data_cnt = 0; | ||
267 | |||
268 | clear_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events); | ||
269 | set_bit(IMXMCI_PEND_CPU_DATA_b, &host->pending_events); | ||
270 | |||
271 | return; | ||
272 | } | ||
273 | |||
274 | if (data->flags & MMC_DATA_READ) { | ||
275 | host->dma_dir = DMA_FROM_DEVICE; | ||
276 | host->dma_nents = dma_map_sg(mmc_dev(host->mmc), data->sg, | ||
277 | data->sg_len, host->dma_dir); | ||
278 | |||
279 | imx_dma_setup_sg(host->dma, data->sg, data->sg_len, datasz, | ||
280 | host->res->start + MMC_BUFFER_ACCESS_OFS, DMA_MODE_READ); | ||
281 | |||
282 | /*imx_dma_setup_mem2dev_ccr(host->dma, DMA_MODE_READ, IMX_DMA_WIDTH_16, CCR_REN);*/ | ||
283 | CCR(host->dma) = CCR_DMOD_LINEAR | CCR_DSIZ_32 | CCR_SMOD_FIFO | CCR_SSIZ_16 | CCR_REN; | ||
284 | } else { | ||
285 | host->dma_dir = DMA_TO_DEVICE; | ||
286 | |||
287 | host->dma_nents = dma_map_sg(mmc_dev(host->mmc), data->sg, | ||
288 | data->sg_len, host->dma_dir); | ||
289 | |||
290 | imx_dma_setup_sg(host->dma, data->sg, data->sg_len, datasz, | ||
291 | host->res->start + MMC_BUFFER_ACCESS_OFS, DMA_MODE_WRITE); | ||
292 | |||
293 | /*imx_dma_setup_mem2dev_ccr(host->dma, DMA_MODE_WRITE, IMX_DMA_WIDTH_16, CCR_REN);*/ | ||
294 | CCR(host->dma) = CCR_SMOD_LINEAR | CCR_SSIZ_32 | CCR_DMOD_FIFO | CCR_DSIZ_16 | CCR_REN; | ||
295 | } | ||
296 | |||
297 | #if 1 /* This code is there only for consistency checking and can be disabled in future */ | ||
298 | host->dma_size = 0; | ||
299 | for(i=0; i<host->dma_nents; i++) | ||
300 | host->dma_size+=data->sg[i].length; | ||
301 | |||
302 | if (datasz > host->dma_size) { | ||
303 | dev_err(mmc_dev(host->mmc), "imxmci_setup_data datasz 0x%x > 0x%x dm_size\n", | ||
304 | datasz, host->dma_size); | ||
305 | } | ||
306 | #endif | ||
307 | |||
308 | host->dma_size = datasz; | ||
309 | |||
310 | wmb(); | ||
311 | |||
312 | if(host->actual_bus_width == MMC_BUS_WIDTH_4) | ||
313 | BLR(host->dma) = 0; /* burst 64 byte read / 64 bytes write */ | ||
314 | else | ||
315 | BLR(host->dma) = 16; /* burst 16 byte read / 16 bytes write */ | ||
316 | |||
317 | RSSR(host->dma) = DMA_REQ_SDHC; | ||
318 | |||
319 | set_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events); | ||
320 | clear_bit(IMXMCI_PEND_CPU_DATA_b, &host->pending_events); | ||
321 | |||
322 | /* start DMA engine for read, write is delayed after initial response */ | ||
323 | if (host->dma_dir == DMA_FROM_DEVICE) { | ||
324 | imx_dma_enable(host->dma); | ||
325 | } | ||
326 | } | ||
327 | |||
328 | static void imxmci_start_cmd(struct imxmci_host *host, struct mmc_command *cmd, unsigned int cmdat) | ||
329 | { | ||
330 | unsigned long flags; | ||
331 | u32 imask; | ||
332 | |||
333 | WARN_ON(host->cmd != NULL); | ||
334 | host->cmd = cmd; | ||
335 | |||
336 | /* Ensure, that clock are stopped else command programming and start fails */ | ||
337 | imxmci_stop_clock(host); | ||
338 | |||
339 | if (cmd->flags & MMC_RSP_BUSY) | ||
340 | cmdat |= CMD_DAT_CONT_BUSY; | ||
341 | |||
342 | switch (mmc_resp_type(cmd)) { | ||
343 | case MMC_RSP_R1: /* short CRC, OPCODE */ | ||
344 | case MMC_RSP_R1B:/* short CRC, OPCODE, BUSY */ | ||
345 | cmdat |= CMD_DAT_CONT_RESPONSE_FORMAT_R1; | ||
346 | break; | ||
347 | case MMC_RSP_R2: /* long 136 bit + CRC */ | ||
348 | cmdat |= CMD_DAT_CONT_RESPONSE_FORMAT_R2; | ||
349 | break; | ||
350 | case MMC_RSP_R3: /* short */ | ||
351 | cmdat |= CMD_DAT_CONT_RESPONSE_FORMAT_R3; | ||
352 | break; | ||
353 | default: | ||
354 | break; | ||
355 | } | ||
356 | |||
357 | if ( test_and_clear_bit(IMXMCI_PEND_SET_INIT_b, &host->pending_events) ) | ||
358 | cmdat |= CMD_DAT_CONT_INIT; /* This command needs init */ | ||
359 | |||
360 | if ( host->actual_bus_width == MMC_BUS_WIDTH_4 ) | ||
361 | cmdat |= CMD_DAT_CONT_BUS_WIDTH_4; | ||
362 | |||
363 | MMC_CMD = cmd->opcode; | ||
364 | MMC_ARGH = cmd->arg >> 16; | ||
365 | MMC_ARGL = cmd->arg & 0xffff; | ||
366 | MMC_CMD_DAT_CONT = cmdat; | ||
367 | |||
368 | atomic_set(&host->stuck_timeout, 0); | ||
369 | set_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events); | ||
370 | |||
371 | |||
372 | imask = IMXMCI_INT_MASK_DEFAULT; | ||
373 | imask &= ~INT_MASK_END_CMD_RES; | ||
374 | if ( cmdat & CMD_DAT_CONT_DATA_ENABLE ) { | ||
375 | /*imask &= ~INT_MASK_BUF_READY;*/ | ||
376 | imask &= ~INT_MASK_DATA_TRAN; | ||
377 | if ( cmdat & CMD_DAT_CONT_WRITE ) | ||
378 | imask &= ~INT_MASK_WRITE_OP_DONE; | ||
379 | if(test_bit(IMXMCI_PEND_CPU_DATA_b, &host->pending_events)) | ||
380 | imask &= ~INT_MASK_BUF_READY; | ||
381 | } | ||
382 | |||
383 | spin_lock_irqsave(&host->lock, flags); | ||
384 | host->imask = imask; | ||
385 | MMC_INT_MASK = host->imask; | ||
386 | spin_unlock_irqrestore(&host->lock, flags); | ||
387 | |||
388 | dev_dbg(mmc_dev(host->mmc), "CMD%02d (0x%02x) mask set to 0x%04x\n", | ||
389 | cmd->opcode, cmd->opcode, imask); | ||
390 | |||
391 | imxmci_start_clock(host); | ||
392 | } | ||
393 | |||
394 | static void imxmci_finish_request(struct imxmci_host *host, struct mmc_request *req) | ||
395 | { | ||
396 | unsigned long flags; | ||
397 | |||
398 | spin_lock_irqsave(&host->lock, flags); | ||
399 | |||
400 | host->pending_events &= ~(IMXMCI_PEND_WAIT_RESP_m | IMXMCI_PEND_DMA_END_m | | ||
401 | IMXMCI_PEND_DMA_DATA_m | IMXMCI_PEND_CPU_DATA_m); | ||
402 | |||
403 | host->imask = IMXMCI_INT_MASK_DEFAULT; | ||
404 | MMC_INT_MASK = host->imask; | ||
405 | |||
406 | spin_unlock_irqrestore(&host->lock, flags); | ||
407 | |||
408 | if(req && req->cmd) | ||
409 | host->prev_cmd_code = req->cmd->opcode; | ||
410 | |||
411 | host->req = NULL; | ||
412 | host->cmd = NULL; | ||
413 | host->data = NULL; | ||
414 | mmc_request_done(host->mmc, req); | ||
415 | } | ||
416 | |||
417 | static int imxmci_finish_data(struct imxmci_host *host, unsigned int stat) | ||
418 | { | ||
419 | struct mmc_data *data = host->data; | ||
420 | int data_error; | ||
421 | |||
422 | if(test_and_clear_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events)){ | ||
423 | imx_dma_disable(host->dma); | ||
424 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->dma_nents, | ||
425 | host->dma_dir); | ||
426 | } | ||
427 | |||
428 | if ( stat & STATUS_ERR_MASK ) { | ||
429 | dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n",stat); | ||
430 | if(stat & (STATUS_CRC_READ_ERR | STATUS_CRC_WRITE_ERR)) | ||
431 | data->error = MMC_ERR_BADCRC; | ||
432 | else if(stat & STATUS_TIME_OUT_READ) | ||
433 | data->error = MMC_ERR_TIMEOUT; | ||
434 | else | ||
435 | data->error = MMC_ERR_FAILED; | ||
436 | } else { | ||
437 | data->bytes_xfered = host->dma_size; | ||
438 | } | ||
439 | |||
440 | data_error = data->error; | ||
441 | |||
442 | host->data = NULL; | ||
443 | |||
444 | return data_error; | ||
445 | } | ||
446 | |||
447 | static int imxmci_cmd_done(struct imxmci_host *host, unsigned int stat) | ||
448 | { | ||
449 | struct mmc_command *cmd = host->cmd; | ||
450 | int i; | ||
451 | u32 a,b,c; | ||
452 | struct mmc_data *data = host->data; | ||
453 | |||
454 | if (!cmd) | ||
455 | return 0; | ||
456 | |||
457 | host->cmd = NULL; | ||
458 | |||
459 | if (stat & STATUS_TIME_OUT_RESP) { | ||
460 | dev_dbg(mmc_dev(host->mmc), "CMD TIMEOUT\n"); | ||
461 | cmd->error = MMC_ERR_TIMEOUT; | ||
462 | } else if (stat & STATUS_RESP_CRC_ERR && cmd->flags & MMC_RSP_CRC) { | ||
463 | dev_dbg(mmc_dev(host->mmc), "cmd crc error\n"); | ||
464 | cmd->error = MMC_ERR_BADCRC; | ||
465 | } | ||
466 | |||
467 | if(cmd->flags & MMC_RSP_PRESENT) { | ||
468 | if(cmd->flags & MMC_RSP_136) { | ||
469 | for (i = 0; i < 4; i++) { | ||
470 | u32 a = MMC_RES_FIFO & 0xffff; | ||
471 | u32 b = MMC_RES_FIFO & 0xffff; | ||
472 | cmd->resp[i] = a<<16 | b; | ||
473 | } | ||
474 | } else { | ||
475 | a = MMC_RES_FIFO & 0xffff; | ||
476 | b = MMC_RES_FIFO & 0xffff; | ||
477 | c = MMC_RES_FIFO & 0xffff; | ||
478 | cmd->resp[0] = a<<24 | b<<8 | c>>8; | ||
479 | } | ||
480 | } | ||
481 | |||
482 | dev_dbg(mmc_dev(host->mmc), "RESP 0x%08x, 0x%08x, 0x%08x, 0x%08x, error %d\n", | ||
483 | cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3], cmd->error); | ||
484 | |||
485 | if (data && (cmd->error == MMC_ERR_NONE) && !(stat & STATUS_ERR_MASK)) { | ||
486 | if (host->req->data->flags & MMC_DATA_WRITE) { | ||
487 | |||
488 | /* Wait for FIFO to be empty before starting DMA write */ | ||
489 | |||
490 | stat = MMC_STATUS; | ||
491 | if(imxmci_busy_wait_for_status(host, &stat, | ||
492 | STATUS_APPL_BUFF_FE, | ||
493 | 40, "imxmci_cmd_done DMA WR") < 0) { | ||
494 | cmd->error = MMC_ERR_FIFO; | ||
495 | imxmci_finish_data(host, stat); | ||
496 | if(host->req) | ||
497 | imxmci_finish_request(host, host->req); | ||
498 | dev_warn(mmc_dev(host->mmc), "STATUS = 0x%04x\n", | ||
499 | stat); | ||
500 | return 0; | ||
501 | } | ||
502 | |||
503 | if(test_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events)) { | ||
504 | imx_dma_enable(host->dma); | ||
505 | } | ||
506 | } | ||
507 | } else { | ||
508 | struct mmc_request *req; | ||
509 | imxmci_stop_clock(host); | ||
510 | req = host->req; | ||
511 | |||
512 | if(data) | ||
513 | imxmci_finish_data(host, stat); | ||
514 | |||
515 | if( req ) { | ||
516 | imxmci_finish_request(host, req); | ||
517 | } else { | ||
518 | dev_warn(mmc_dev(host->mmc), "imxmci_cmd_done: no request to finish\n"); | ||
519 | } | ||
520 | } | ||
521 | |||
522 | return 1; | ||
523 | } | ||
524 | |||
525 | static int imxmci_data_done(struct imxmci_host *host, unsigned int stat) | ||
526 | { | ||
527 | struct mmc_data *data = host->data; | ||
528 | int data_error; | ||
529 | |||
530 | if (!data) | ||
531 | return 0; | ||
532 | |||
533 | data_error = imxmci_finish_data(host, stat); | ||
534 | |||
535 | if (host->req->stop) { | ||
536 | imxmci_stop_clock(host); | ||
537 | imxmci_start_cmd(host, host->req->stop, 0); | ||
538 | } else { | ||
539 | struct mmc_request *req; | ||
540 | req = host->req; | ||
541 | if( req ) { | ||
542 | imxmci_finish_request(host, req); | ||
543 | } else { | ||
544 | dev_warn(mmc_dev(host->mmc), "imxmci_data_done: no request to finish\n"); | ||
545 | } | ||
546 | } | ||
547 | |||
548 | return 1; | ||
549 | } | ||
550 | |||
551 | static int imxmci_cpu_driven_data(struct imxmci_host *host, unsigned int *pstat) | ||
552 | { | ||
553 | int i; | ||
554 | int burst_len; | ||
555 | int trans_done = 0; | ||
556 | unsigned int stat = *pstat; | ||
557 | |||
558 | if(host->actual_bus_width != MMC_BUS_WIDTH_4) | ||
559 | burst_len = 16; | ||
560 | else | ||
561 | burst_len = 64; | ||
562 | |||
563 | /* This is unfortunately required */ | ||
564 | dev_dbg(mmc_dev(host->mmc), "imxmci_cpu_driven_data running STATUS = 0x%x\n", | ||
565 | stat); | ||
566 | |||
567 | udelay(20); /* required for clocks < 8MHz*/ | ||
568 | |||
569 | if(host->dma_dir == DMA_FROM_DEVICE) { | ||
570 | imxmci_busy_wait_for_status(host, &stat, | ||
571 | STATUS_APPL_BUFF_FF | STATUS_DATA_TRANS_DONE | | ||
572 | STATUS_TIME_OUT_READ, | ||
573 | 50, "imxmci_cpu_driven_data read"); | ||
574 | |||
575 | while((stat & (STATUS_APPL_BUFF_FF | STATUS_DATA_TRANS_DONE)) && | ||
576 | !(stat & STATUS_TIME_OUT_READ) && | ||
577 | (host->data_cnt < 512)) { | ||
578 | |||
579 | udelay(20); /* required for clocks < 8MHz*/ | ||
580 | |||
581 | for(i = burst_len; i>=2 ; i-=2) { | ||
582 | u16 data; | ||
583 | data = MMC_BUFFER_ACCESS; | ||
584 | udelay(10); /* required for clocks < 8MHz*/ | ||
585 | if(host->data_cnt+2 <= host->dma_size) { | ||
586 | *(host->data_ptr++) = data; | ||
587 | } else { | ||
588 | if(host->data_cnt < host->dma_size) | ||
589 | *(u8*)(host->data_ptr) = data; | ||
590 | } | ||
591 | host->data_cnt += 2; | ||
592 | } | ||
593 | |||
594 | stat = MMC_STATUS; | ||
595 | |||
596 | dev_dbg(mmc_dev(host->mmc), "imxmci_cpu_driven_data read %d burst %d STATUS = 0x%x\n", | ||
597 | host->data_cnt, burst_len, stat); | ||
598 | } | ||
599 | |||
600 | if((stat & STATUS_DATA_TRANS_DONE) && (host->data_cnt >= 512)) | ||
601 | trans_done = 1; | ||
602 | |||
603 | if(host->dma_size & 0x1ff) | ||
604 | stat &= ~STATUS_CRC_READ_ERR; | ||
605 | |||
606 | if(stat & STATUS_TIME_OUT_READ) { | ||
607 | dev_dbg(mmc_dev(host->mmc), "imxmci_cpu_driven_data read timeout STATUS = 0x%x\n", | ||
608 | stat); | ||
609 | trans_done = -1; | ||
610 | } | ||
611 | |||
612 | } else { | ||
613 | imxmci_busy_wait_for_status(host, &stat, | ||
614 | STATUS_APPL_BUFF_FE, | ||
615 | 20, "imxmci_cpu_driven_data write"); | ||
616 | |||
617 | while((stat & STATUS_APPL_BUFF_FE) && | ||
618 | (host->data_cnt < host->dma_size)) { | ||
619 | if(burst_len >= host->dma_size - host->data_cnt) { | ||
620 | burst_len = host->dma_size - host->data_cnt; | ||
621 | host->data_cnt = host->dma_size; | ||
622 | trans_done = 1; | ||
623 | } else { | ||
624 | host->data_cnt += burst_len; | ||
625 | } | ||
626 | |||
627 | for(i = burst_len; i>0 ; i-=2) | ||
628 | MMC_BUFFER_ACCESS = *(host->data_ptr++); | ||
629 | |||
630 | stat = MMC_STATUS; | ||
631 | |||
632 | dev_dbg(mmc_dev(host->mmc), "imxmci_cpu_driven_data write burst %d STATUS = 0x%x\n", | ||
633 | burst_len, stat); | ||
634 | } | ||
635 | } | ||
636 | |||
637 | *pstat = stat; | ||
638 | |||
639 | return trans_done; | ||
640 | } | ||
641 | |||
642 | static void imxmci_dma_irq(int dma, void *devid) | ||
643 | { | ||
644 | struct imxmci_host *host = devid; | ||
645 | uint32_t stat = MMC_STATUS; | ||
646 | |||
647 | atomic_set(&host->stuck_timeout, 0); | ||
648 | host->status_reg = stat; | ||
649 | set_bit(IMXMCI_PEND_DMA_END_b, &host->pending_events); | ||
650 | tasklet_schedule(&host->tasklet); | ||
651 | } | ||
652 | |||
653 | static irqreturn_t imxmci_irq(int irq, void *devid) | ||
654 | { | ||
655 | struct imxmci_host *host = devid; | ||
656 | uint32_t stat = MMC_STATUS; | ||
657 | int handled = 1; | ||
658 | |||
659 | MMC_INT_MASK = host->imask | INT_MASK_SDIO | INT_MASK_AUTO_CARD_DETECT; | ||
660 | |||
661 | atomic_set(&host->stuck_timeout, 0); | ||
662 | host->status_reg = stat; | ||
663 | set_bit(IMXMCI_PEND_IRQ_b, &host->pending_events); | ||
664 | set_bit(IMXMCI_PEND_STARTED_b, &host->pending_events); | ||
665 | tasklet_schedule(&host->tasklet); | ||
666 | |||
667 | return IRQ_RETVAL(handled);; | ||
668 | } | ||
669 | |||
670 | static void imxmci_tasklet_fnc(unsigned long data) | ||
671 | { | ||
672 | struct imxmci_host *host = (struct imxmci_host *)data; | ||
673 | u32 stat; | ||
674 | unsigned int data_dir_mask = 0; /* STATUS_WR_CRC_ERROR_CODE_MASK */ | ||
675 | int timeout = 0; | ||
676 | |||
677 | if(atomic_read(&host->stuck_timeout) > 4) { | ||
678 | char *what; | ||
679 | timeout = 1; | ||
680 | stat = MMC_STATUS; | ||
681 | host->status_reg = stat; | ||
682 | if (test_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events)) | ||
683 | if (test_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events)) | ||
684 | what = "RESP+DMA"; | ||
685 | else | ||
686 | what = "RESP"; | ||
687 | else | ||
688 | if (test_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events)) | ||
689 | if(test_bit(IMXMCI_PEND_DMA_END_b, &host->pending_events)) | ||
690 | what = "DATA"; | ||
691 | else | ||
692 | what = "DMA"; | ||
693 | else | ||
694 | what = "???"; | ||
695 | |||
696 | dev_err(mmc_dev(host->mmc), "%s TIMEOUT, hardware stucked STATUS = 0x%04x IMASK = 0x%04x\n", | ||
697 | what, stat, MMC_INT_MASK); | ||
698 | dev_err(mmc_dev(host->mmc), "CMD_DAT_CONT = 0x%04x, MMC_BLK_LEN = 0x%04x, MMC_NOB = 0x%04x, DMA_CCR = 0x%08x\n", | ||
699 | MMC_CMD_DAT_CONT, MMC_BLK_LEN, MMC_NOB, CCR(host->dma)); | ||
700 | dev_err(mmc_dev(host->mmc), "CMD%d, prevCMD%d, bus %d-bit, dma_size = 0x%x\n", | ||
701 | host->cmd?host->cmd->opcode:0, host->prev_cmd_code, 1<<host->actual_bus_width, host->dma_size); | ||
702 | } | ||
703 | |||
704 | if(!host->present || timeout) | ||
705 | host->status_reg = STATUS_TIME_OUT_RESP | STATUS_TIME_OUT_READ | | ||
706 | STATUS_CRC_READ_ERR | STATUS_CRC_WRITE_ERR; | ||
707 | |||
708 | if(test_bit(IMXMCI_PEND_IRQ_b, &host->pending_events) || timeout) { | ||
709 | clear_bit(IMXMCI_PEND_IRQ_b, &host->pending_events); | ||
710 | |||
711 | stat = MMC_STATUS; | ||
712 | /* | ||
713 | * This is not required in theory, but there is chance to miss some flag | ||
714 | * which clears automatically by mask write, FreeScale original code keeps | ||
715 | * stat from IRQ time so do I | ||
716 | */ | ||
717 | stat |= host->status_reg; | ||
718 | |||
719 | if(test_bit(IMXMCI_PEND_CPU_DATA_b, &host->pending_events)) | ||
720 | stat &= ~STATUS_CRC_READ_ERR; | ||
721 | |||
722 | if(test_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events)) { | ||
723 | imxmci_busy_wait_for_status(host, &stat, | ||
724 | STATUS_END_CMD_RESP | STATUS_ERR_MASK, | ||
725 | 20, "imxmci_tasklet_fnc resp (ERRATUM #4)"); | ||
726 | } | ||
727 | |||
728 | if(stat & (STATUS_END_CMD_RESP | STATUS_ERR_MASK)) { | ||
729 | if(test_and_clear_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events)) | ||
730 | imxmci_cmd_done(host, stat); | ||
731 | if(host->data && (stat & STATUS_ERR_MASK)) | ||
732 | imxmci_data_done(host, stat); | ||
733 | } | ||
734 | |||
735 | if(test_bit(IMXMCI_PEND_CPU_DATA_b, &host->pending_events)) { | ||
736 | stat |= MMC_STATUS; | ||
737 | if(imxmci_cpu_driven_data(host, &stat)){ | ||
738 | if(test_and_clear_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events)) | ||
739 | imxmci_cmd_done(host, stat); | ||
740 | atomic_clear_mask(IMXMCI_PEND_IRQ_m|IMXMCI_PEND_CPU_DATA_m, | ||
741 | &host->pending_events); | ||
742 | imxmci_data_done(host, stat); | ||
743 | } | ||
744 | } | ||
745 | } | ||
746 | |||
747 | if(test_bit(IMXMCI_PEND_DMA_END_b, &host->pending_events) && | ||
748 | !test_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events)) { | ||
749 | |||
750 | stat = MMC_STATUS; | ||
751 | /* Same as above */ | ||
752 | stat |= host->status_reg; | ||
753 | |||
754 | if(host->dma_dir == DMA_TO_DEVICE) { | ||
755 | data_dir_mask = STATUS_WRITE_OP_DONE; | ||
756 | } else { | ||
757 | data_dir_mask = STATUS_DATA_TRANS_DONE; | ||
758 | } | ||
759 | |||
760 | if(stat & data_dir_mask) { | ||
761 | clear_bit(IMXMCI_PEND_DMA_END_b, &host->pending_events); | ||
762 | imxmci_data_done(host, stat); | ||
763 | } | ||
764 | } | ||
765 | |||
766 | if(test_and_clear_bit(IMXMCI_PEND_CARD_XCHG_b, &host->pending_events)) { | ||
767 | |||
768 | if(host->cmd) | ||
769 | imxmci_cmd_done(host, STATUS_TIME_OUT_RESP); | ||
770 | |||
771 | if(host->data) | ||
772 | imxmci_data_done(host, STATUS_TIME_OUT_READ | | ||
773 | STATUS_CRC_READ_ERR | STATUS_CRC_WRITE_ERR); | ||
774 | |||
775 | if(host->req) | ||
776 | imxmci_finish_request(host, host->req); | ||
777 | |||
778 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); | ||
779 | |||
780 | } | ||
781 | } | ||
782 | |||
783 | static void imxmci_request(struct mmc_host *mmc, struct mmc_request *req) | ||
784 | { | ||
785 | struct imxmci_host *host = mmc_priv(mmc); | ||
786 | unsigned int cmdat; | ||
787 | |||
788 | WARN_ON(host->req != NULL); | ||
789 | |||
790 | host->req = req; | ||
791 | |||
792 | cmdat = 0; | ||
793 | |||
794 | if (req->data) { | ||
795 | imxmci_setup_data(host, req->data); | ||
796 | |||
797 | cmdat |= CMD_DAT_CONT_DATA_ENABLE; | ||
798 | |||
799 | if (req->data->flags & MMC_DATA_WRITE) | ||
800 | cmdat |= CMD_DAT_CONT_WRITE; | ||
801 | |||
802 | if (req->data->flags & MMC_DATA_STREAM) { | ||
803 | cmdat |= CMD_DAT_CONT_STREAM_BLOCK; | ||
804 | } | ||
805 | } | ||
806 | |||
807 | imxmci_start_cmd(host, req->cmd, cmdat); | ||
808 | } | ||
809 | |||
810 | #define CLK_RATE 19200000 | ||
811 | |||
812 | static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | ||
813 | { | ||
814 | struct imxmci_host *host = mmc_priv(mmc); | ||
815 | int prescaler; | ||
816 | |||
817 | if( ios->bus_width==MMC_BUS_WIDTH_4 ) { | ||
818 | host->actual_bus_width = MMC_BUS_WIDTH_4; | ||
819 | imx_gpio_mode(PB11_PF_SD_DAT3); | ||
820 | }else{ | ||
821 | host->actual_bus_width = MMC_BUS_WIDTH_1; | ||
822 | imx_gpio_mode(GPIO_PORTB | GPIO_IN | GPIO_PUEN | 11); | ||
823 | } | ||
824 | |||
825 | if ( host->power_mode != ios->power_mode ) { | ||
826 | switch (ios->power_mode) { | ||
827 | case MMC_POWER_OFF: | ||
828 | break; | ||
829 | case MMC_POWER_UP: | ||
830 | set_bit(IMXMCI_PEND_SET_INIT_b, &host->pending_events); | ||
831 | break; | ||
832 | case MMC_POWER_ON: | ||
833 | break; | ||
834 | } | ||
835 | host->power_mode = ios->power_mode; | ||
836 | } | ||
837 | |||
838 | if ( ios->clock ) { | ||
839 | unsigned int clk; | ||
840 | |||
841 | /* The prescaler is 5 for PERCLK2 equal to 96MHz | ||
842 | * then 96MHz / 5 = 19.2 MHz | ||
843 | */ | ||
844 | clk=imx_get_perclk2(); | ||
845 | prescaler=(clk+(CLK_RATE*7)/8)/CLK_RATE; | ||
846 | switch(prescaler) { | ||
847 | case 0: | ||
848 | case 1: prescaler = 0; | ||
849 | break; | ||
850 | case 2: prescaler = 1; | ||
851 | break; | ||
852 | case 3: prescaler = 2; | ||
853 | break; | ||
854 | case 4: prescaler = 4; | ||
855 | break; | ||
856 | default: | ||
857 | case 5: prescaler = 5; | ||
858 | break; | ||
859 | } | ||
860 | |||
861 | dev_dbg(mmc_dev(host->mmc), "PERCLK2 %d MHz -> prescaler %d\n", | ||
862 | clk, prescaler); | ||
863 | |||
864 | for(clk=0; clk<8; clk++) { | ||
865 | int x; | ||
866 | x = CLK_RATE / (1<<clk); | ||
867 | if( x <= ios->clock) | ||
868 | break; | ||
869 | } | ||
870 | |||
871 | MMC_STR_STP_CLK |= STR_STP_CLK_ENABLE; /* enable controller */ | ||
872 | |||
873 | imxmci_stop_clock(host); | ||
874 | MMC_CLK_RATE = (prescaler<<3) | clk; | ||
875 | /* | ||
876 | * Under my understanding, clock should not be started there, because it would | ||
877 | * initiate SDHC sequencer and send last or random command into card | ||
878 | */ | ||
879 | /*imxmci_start_clock(host);*/ | ||
880 | |||
881 | dev_dbg(mmc_dev(host->mmc), "MMC_CLK_RATE: 0x%08x\n", MMC_CLK_RATE); | ||
882 | } else { | ||
883 | imxmci_stop_clock(host); | ||
884 | } | ||
885 | } | ||
886 | |||
887 | static const struct mmc_host_ops imxmci_ops = { | ||
888 | .request = imxmci_request, | ||
889 | .set_ios = imxmci_set_ios, | ||
890 | }; | ||
891 | |||
892 | static struct resource *platform_device_resource(struct platform_device *dev, unsigned int mask, int nr) | ||
893 | { | ||
894 | int i; | ||
895 | |||
896 | for (i = 0; i < dev->num_resources; i++) | ||
897 | if (dev->resource[i].flags == mask && nr-- == 0) | ||
898 | return &dev->resource[i]; | ||
899 | return NULL; | ||
900 | } | ||
901 | |||
902 | static int platform_device_irq(struct platform_device *dev, int nr) | ||
903 | { | ||
904 | int i; | ||
905 | |||
906 | for (i = 0; i < dev->num_resources; i++) | ||
907 | if (dev->resource[i].flags == IORESOURCE_IRQ && nr-- == 0) | ||
908 | return dev->resource[i].start; | ||
909 | return NO_IRQ; | ||
910 | } | ||
911 | |||
912 | static void imxmci_check_status(unsigned long data) | ||
913 | { | ||
914 | struct imxmci_host *host = (struct imxmci_host *)data; | ||
915 | |||
916 | if( host->pdata->card_present() != host->present ) { | ||
917 | host->present ^= 1; | ||
918 | dev_info(mmc_dev(host->mmc), "card %s\n", | ||
919 | host->present ? "inserted" : "removed"); | ||
920 | |||
921 | set_bit(IMXMCI_PEND_CARD_XCHG_b, &host->pending_events); | ||
922 | tasklet_schedule(&host->tasklet); | ||
923 | } | ||
924 | |||
925 | if(test_bit(IMXMCI_PEND_WAIT_RESP_b, &host->pending_events) || | ||
926 | test_bit(IMXMCI_PEND_DMA_DATA_b, &host->pending_events)) { | ||
927 | atomic_inc(&host->stuck_timeout); | ||
928 | if(atomic_read(&host->stuck_timeout) > 4) | ||
929 | tasklet_schedule(&host->tasklet); | ||
930 | } else { | ||
931 | atomic_set(&host->stuck_timeout, 0); | ||
932 | |||
933 | } | ||
934 | |||
935 | mod_timer(&host->timer, jiffies + (HZ>>1)); | ||
936 | } | ||
937 | |||
938 | static int imxmci_probe(struct platform_device *pdev) | ||
939 | { | ||
940 | struct mmc_host *mmc; | ||
941 | struct imxmci_host *host = NULL; | ||
942 | struct resource *r; | ||
943 | int ret = 0, irq; | ||
944 | |||
945 | printk(KERN_INFO "i.MX mmc driver\n"); | ||
946 | |||
947 | r = platform_device_resource(pdev, IORESOURCE_MEM, 0); | ||
948 | irq = platform_device_irq(pdev, 0); | ||
949 | if (!r || irq == NO_IRQ) | ||
950 | return -ENXIO; | ||
951 | |||
952 | r = request_mem_region(r->start, 0x100, "IMXMCI"); | ||
953 | if (!r) | ||
954 | return -EBUSY; | ||
955 | |||
956 | mmc = mmc_alloc_host(sizeof(struct imxmci_host), &pdev->dev); | ||
957 | if (!mmc) { | ||
958 | ret = -ENOMEM; | ||
959 | goto out; | ||
960 | } | ||
961 | |||
962 | mmc->ops = &imxmci_ops; | ||
963 | mmc->f_min = 150000; | ||
964 | mmc->f_max = CLK_RATE/2; | ||
965 | mmc->ocr_avail = MMC_VDD_32_33; | ||
966 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_BYTEBLOCK; | ||
967 | |||
968 | /* MMC core transfer sizes tunable parameters */ | ||
969 | mmc->max_hw_segs = 64; | ||
970 | mmc->max_phys_segs = 64; | ||
971 | mmc->max_seg_size = 64*512; /* default PAGE_CACHE_SIZE */ | ||
972 | mmc->max_req_size = 64*512; /* default PAGE_CACHE_SIZE */ | ||
973 | mmc->max_blk_size = 2048; | ||
974 | mmc->max_blk_count = 65535; | ||
975 | |||
976 | host = mmc_priv(mmc); | ||
977 | host->mmc = mmc; | ||
978 | host->dma_allocated = 0; | ||
979 | host->pdata = pdev->dev.platform_data; | ||
980 | |||
981 | spin_lock_init(&host->lock); | ||
982 | host->res = r; | ||
983 | host->irq = irq; | ||
984 | |||
985 | imx_gpio_mode(PB8_PF_SD_DAT0); | ||
986 | imx_gpio_mode(PB9_PF_SD_DAT1); | ||
987 | imx_gpio_mode(PB10_PF_SD_DAT2); | ||
988 | /* Configured as GPIO with pull-up to ensure right MCC card mode */ | ||
989 | /* Switched to PB11_PF_SD_DAT3 if 4 bit bus is configured */ | ||
990 | imx_gpio_mode(GPIO_PORTB | GPIO_IN | GPIO_PUEN | 11); | ||
991 | /* imx_gpio_mode(PB11_PF_SD_DAT3); */ | ||
992 | imx_gpio_mode(PB12_PF_SD_CLK); | ||
993 | imx_gpio_mode(PB13_PF_SD_CMD); | ||
994 | |||
995 | imxmci_softreset(); | ||
996 | |||
997 | if ( MMC_REV_NO != 0x390 ) { | ||
998 | dev_err(mmc_dev(host->mmc), "wrong rev.no. 0x%08x. aborting.\n", | ||
999 | MMC_REV_NO); | ||
1000 | goto out; | ||
1001 | } | ||
1002 | |||
1003 | MMC_READ_TO = 0x2db4; /* recommended in data sheet */ | ||
1004 | |||
1005 | host->imask = IMXMCI_INT_MASK_DEFAULT; | ||
1006 | MMC_INT_MASK = host->imask; | ||
1007 | |||
1008 | |||
1009 | if(imx_dma_request_by_prio(&host->dma, DRIVER_NAME, DMA_PRIO_LOW)<0){ | ||
1010 | dev_err(mmc_dev(host->mmc), "imx_dma_request_by_prio failed\n"); | ||
1011 | ret = -EBUSY; | ||
1012 | goto out; | ||
1013 | } | ||
1014 | host->dma_allocated=1; | ||
1015 | imx_dma_setup_handlers(host->dma, imxmci_dma_irq, NULL, host); | ||
1016 | |||
1017 | tasklet_init(&host->tasklet, imxmci_tasklet_fnc, (unsigned long)host); | ||
1018 | host->status_reg=0; | ||
1019 | host->pending_events=0; | ||
1020 | |||
1021 | ret = request_irq(host->irq, imxmci_irq, 0, DRIVER_NAME, host); | ||
1022 | if (ret) | ||
1023 | goto out; | ||
1024 | |||
1025 | host->present = host->pdata->card_present(); | ||
1026 | init_timer(&host->timer); | ||
1027 | host->timer.data = (unsigned long)host; | ||
1028 | host->timer.function = imxmci_check_status; | ||
1029 | add_timer(&host->timer); | ||
1030 | mod_timer(&host->timer, jiffies + (HZ>>1)); | ||
1031 | |||
1032 | platform_set_drvdata(pdev, mmc); | ||
1033 | |||
1034 | mmc_add_host(mmc); | ||
1035 | |||
1036 | return 0; | ||
1037 | |||
1038 | out: | ||
1039 | if (host) { | ||
1040 | if(host->dma_allocated){ | ||
1041 | imx_dma_free(host->dma); | ||
1042 | host->dma_allocated=0; | ||
1043 | } | ||
1044 | } | ||
1045 | if (mmc) | ||
1046 | mmc_free_host(mmc); | ||
1047 | release_resource(r); | ||
1048 | return ret; | ||
1049 | } | ||
1050 | |||
1051 | static int imxmci_remove(struct platform_device *pdev) | ||
1052 | { | ||
1053 | struct mmc_host *mmc = platform_get_drvdata(pdev); | ||
1054 | |||
1055 | platform_set_drvdata(pdev, NULL); | ||
1056 | |||
1057 | if (mmc) { | ||
1058 | struct imxmci_host *host = mmc_priv(mmc); | ||
1059 | |||
1060 | tasklet_disable(&host->tasklet); | ||
1061 | |||
1062 | del_timer_sync(&host->timer); | ||
1063 | mmc_remove_host(mmc); | ||
1064 | |||
1065 | free_irq(host->irq, host); | ||
1066 | if(host->dma_allocated){ | ||
1067 | imx_dma_free(host->dma); | ||
1068 | host->dma_allocated=0; | ||
1069 | } | ||
1070 | |||
1071 | tasklet_kill(&host->tasklet); | ||
1072 | |||
1073 | release_resource(host->res); | ||
1074 | |||
1075 | mmc_free_host(mmc); | ||
1076 | } | ||
1077 | return 0; | ||
1078 | } | ||
1079 | |||
1080 | #ifdef CONFIG_PM | ||
1081 | static int imxmci_suspend(struct platform_device *dev, pm_message_t state) | ||
1082 | { | ||
1083 | struct mmc_host *mmc = platform_get_drvdata(dev); | ||
1084 | int ret = 0; | ||
1085 | |||
1086 | if (mmc) | ||
1087 | ret = mmc_suspend_host(mmc, state); | ||
1088 | |||
1089 | return ret; | ||
1090 | } | ||
1091 | |||
1092 | static int imxmci_resume(struct platform_device *dev) | ||
1093 | { | ||
1094 | struct mmc_host *mmc = platform_get_drvdata(dev); | ||
1095 | struct imxmci_host *host; | ||
1096 | int ret = 0; | ||
1097 | |||
1098 | if (mmc) { | ||
1099 | host = mmc_priv(mmc); | ||
1100 | if(host) | ||
1101 | set_bit(IMXMCI_PEND_SET_INIT_b, &host->pending_events); | ||
1102 | ret = mmc_resume_host(mmc); | ||
1103 | } | ||
1104 | |||
1105 | return ret; | ||
1106 | } | ||
1107 | #else | ||
1108 | #define imxmci_suspend NULL | ||
1109 | #define imxmci_resume NULL | ||
1110 | #endif /* CONFIG_PM */ | ||
1111 | |||
1112 | static struct platform_driver imxmci_driver = { | ||
1113 | .probe = imxmci_probe, | ||
1114 | .remove = imxmci_remove, | ||
1115 | .suspend = imxmci_suspend, | ||
1116 | .resume = imxmci_resume, | ||
1117 | .driver = { | ||
1118 | .name = DRIVER_NAME, | ||
1119 | } | ||
1120 | }; | ||
1121 | |||
1122 | static int __init imxmci_init(void) | ||
1123 | { | ||
1124 | return platform_driver_register(&imxmci_driver); | ||
1125 | } | ||
1126 | |||
1127 | static void __exit imxmci_exit(void) | ||
1128 | { | ||
1129 | platform_driver_unregister(&imxmci_driver); | ||
1130 | } | ||
1131 | |||
1132 | module_init(imxmci_init); | ||
1133 | module_exit(imxmci_exit); | ||
1134 | |||
1135 | MODULE_DESCRIPTION("i.MX Multimedia Card Interface Driver"); | ||
1136 | MODULE_AUTHOR("Sascha Hauer, Pengutronix"); | ||
1137 | MODULE_LICENSE("GPL"); | ||