Commit | Line | Data |
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9d2bd738 SM |
1 | /* |
2 | * linux/drivers/mmc/host/msm_sdcc.c - Qualcomm MSM 7X00A SDCC Driver | |
3 | * | |
4 | * Copyright (C) 2007 Google Inc, | |
5 | * Copyright (C) 2003 Deep Blue Solutions, Ltd, All Rights Reserved. | |
56a8b5b8 | 6 | * Copyright (C) 2009, Code Aurora Forum. All Rights Reserved. |
9d2bd738 SM |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Based on mmci.c | |
13 | * | |
14 | * Author: San Mehat (san@android.com) | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/moduleparam.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/err.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/log2.h> | |
28 | #include <linux/mmc/host.h> | |
29 | #include <linux/mmc/card.h> | |
b3fa5791 | 30 | #include <linux/mmc/sdio.h> |
9d2bd738 SM |
31 | #include <linux/clk.h> |
32 | #include <linux/scatterlist.h> | |
33 | #include <linux/platform_device.h> | |
34 | #include <linux/dma-mapping.h> | |
35 | #include <linux/debugfs.h> | |
36 | #include <linux/io.h> | |
37 | #include <linux/memory.h> | |
5a0e3ad6 | 38 | #include <linux/gfp.h> |
7a89248a | 39 | #include <linux/gpio.h> |
9d2bd738 SM |
40 | |
41 | #include <asm/cacheflush.h> | |
42 | #include <asm/div64.h> | |
43 | #include <asm/sizes.h> | |
44 | ||
3989d178 | 45 | #include <mach/mmc.h> |
9d2bd738 SM |
46 | #include <mach/msm_iomap.h> |
47 | #include <mach/dma.h> | |
b08bb35d | 48 | #include <mach/clk.h> |
9d2bd738 | 49 | |
9d2bd738 SM |
50 | #include "msm_sdcc.h" |
51 | ||
52 | #define DRIVER_NAME "msm-sdcc" | |
53 | ||
24bbd7d5 | 54 | #define BUSCLK_PWRSAVE 1 |
c7fc9370 | 55 | #define BUSCLK_TIMEOUT (HZ) |
9d2bd738 SM |
56 | static unsigned int msmsdcc_fmin = 144000; |
57 | static unsigned int msmsdcc_fmax = 50000000; | |
58 | static unsigned int msmsdcc_4bit = 1; | |
59 | static unsigned int msmsdcc_pwrsave = 1; | |
60 | static unsigned int msmsdcc_piopoll = 1; | |
61 | static unsigned int msmsdcc_sdioirq; | |
62 | ||
63 | #define PIO_SPINMAX 30 | |
64 | #define CMD_SPINMAX 20 | |
65 | ||
865c8064 | 66 | |
d0719e59 | 67 | static inline void |
c7fc9370 | 68 | msmsdcc_disable_clocks(struct msmsdcc_host *host, int deferr) |
865c8064 | 69 | { |
c7fc9370 | 70 | WARN_ON(!host->clks_on); |
8b1c2ba2 | 71 | |
f4748499 SM |
72 | BUG_ON(host->curr.mrq); |
73 | ||
c7fc9370 SM |
74 | if (deferr) { |
75 | mod_timer(&host->busclk_timer, jiffies + BUSCLK_TIMEOUT); | |
865c8064 | 76 | } else { |
c7fc9370 | 77 | del_timer_sync(&host->busclk_timer); |
d0719e59 SM |
78 | /* Need to check clks_on again in case the busclk |
79 | * timer fired | |
80 | */ | |
81 | if (host->clks_on) { | |
82 | clk_disable(host->clk); | |
83 | clk_disable(host->pclk); | |
84 | host->clks_on = 0; | |
85 | } | |
865c8064 | 86 | } |
c7fc9370 SM |
87 | } |
88 | ||
89 | static inline int | |
90 | msmsdcc_enable_clocks(struct msmsdcc_host *host) | |
91 | { | |
92 | int rc; | |
93 | ||
c7fc9370 SM |
94 | del_timer_sync(&host->busclk_timer); |
95 | ||
d0719e59 SM |
96 | if (!host->clks_on) { |
97 | rc = clk_enable(host->pclk); | |
98 | if (rc) | |
99 | return rc; | |
100 | rc = clk_enable(host->clk); | |
101 | if (rc) { | |
102 | clk_disable(host->pclk); | |
103 | return rc; | |
104 | } | |
105 | udelay(1 + ((3 * USEC_PER_SEC) / | |
106 | (host->clk_rate ? host->clk_rate : msmsdcc_fmin))); | |
107 | host->clks_on = 1; | |
c7fc9370 | 108 | } |
865c8064 SM |
109 | return 0; |
110 | } | |
111 | ||
8b1c2ba2 SM |
112 | static inline unsigned int |
113 | msmsdcc_readl(struct msmsdcc_host *host, unsigned int reg) | |
114 | { | |
115 | return readl(host->base + reg); | |
116 | } | |
117 | ||
118 | static inline void | |
119 | msmsdcc_writel(struct msmsdcc_host *host, u32 data, unsigned int reg) | |
120 | { | |
121 | writel(data, host->base + reg); | |
122 | /* 3 clk delay required! */ | |
123 | udelay(1 + ((3 * USEC_PER_SEC) / | |
124 | (host->clk_rate ? host->clk_rate : msmsdcc_fmin))); | |
125 | } | |
865c8064 | 126 | |
9d2bd738 SM |
127 | static void |
128 | msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd, | |
129 | u32 c); | |
130 | ||
b08bb35d ST |
131 | static void msmsdcc_reset_and_restore(struct msmsdcc_host *host) |
132 | { | |
133 | u32 mci_clk = 0; | |
134 | u32 mci_mask0 = 0; | |
135 | int ret = 0; | |
136 | ||
137 | /* Save the controller state */ | |
138 | mci_clk = readl(host->base + MMCICLOCK); | |
139 | mci_mask0 = readl(host->base + MMCIMASK0); | |
140 | ||
141 | /* Reset the controller */ | |
142 | ret = clk_reset(host->clk, CLK_RESET_ASSERT); | |
143 | if (ret) | |
144 | pr_err("%s: Clock assert failed at %u Hz with err %d\n", | |
145 | mmc_hostname(host->mmc), host->clk_rate, ret); | |
146 | ||
147 | ret = clk_reset(host->clk, CLK_RESET_DEASSERT); | |
148 | if (ret) | |
149 | pr_err("%s: Clock deassert failed at %u Hz with err %d\n", | |
150 | mmc_hostname(host->mmc), host->clk_rate, ret); | |
151 | ||
152 | pr_info("%s: Controller has been re-initialiazed\n", | |
153 | mmc_hostname(host->mmc)); | |
154 | ||
155 | /* Restore the contoller state */ | |
156 | writel(host->pwr, host->base + MMCIPOWER); | |
157 | writel(mci_clk, host->base + MMCICLOCK); | |
158 | writel(mci_mask0, host->base + MMCIMASK0); | |
159 | ret = clk_set_rate(host->clk, host->clk_rate); | |
160 | if (ret) | |
161 | pr_err("%s: Failed to set clk rate %u Hz (%d)\n", | |
162 | mmc_hostname(host->mmc), host->clk_rate, ret); | |
163 | } | |
164 | ||
9d2bd738 SM |
165 | static void |
166 | msmsdcc_request_end(struct msmsdcc_host *host, struct mmc_request *mrq) | |
167 | { | |
9d2bd738 SM |
168 | BUG_ON(host->curr.data); |
169 | ||
170 | host->curr.mrq = NULL; | |
171 | host->curr.cmd = NULL; | |
172 | ||
173 | if (mrq->data) | |
174 | mrq->data->bytes_xfered = host->curr.data_xfered; | |
175 | if (mrq->cmd->error == -ETIMEDOUT) | |
176 | mdelay(5); | |
177 | ||
f4748499 | 178 | #if BUSCLK_PWRSAVE |
c7fc9370 | 179 | msmsdcc_disable_clocks(host, 1); |
f4748499 | 180 | #endif |
9d2bd738 SM |
181 | /* |
182 | * Need to drop the host lock here; mmc_request_done may call | |
183 | * back into the driver... | |
184 | */ | |
185 | spin_unlock(&host->lock); | |
186 | mmc_request_done(host->mmc, mrq); | |
187 | spin_lock(&host->lock); | |
188 | } | |
189 | ||
190 | static void | |
191 | msmsdcc_stop_data(struct msmsdcc_host *host) | |
192 | { | |
9d2bd738 | 193 | host->curr.data = NULL; |
0c521ccb | 194 | host->curr.got_dataend = 0; |
9d2bd738 SM |
195 | } |
196 | ||
197 | uint32_t msmsdcc_fifo_addr(struct msmsdcc_host *host) | |
198 | { | |
edd4dd0e | 199 | return host->memres->start + MMCIFIFO; |
9d2bd738 SM |
200 | } |
201 | ||
56a8b5b8 SM |
202 | static inline void |
203 | msmsdcc_start_command_exec(struct msmsdcc_host *host, u32 arg, u32 c) { | |
204 | msmsdcc_writel(host, arg, MMCIARGUMENT); | |
205 | msmsdcc_writel(host, c, MMCICOMMAND); | |
206 | } | |
207 | ||
208 | static void | |
209 | msmsdcc_dma_exec_func(struct msm_dmov_cmd *cmd) | |
210 | { | |
6ac9ea69 | 211 | struct msmsdcc_host *host = (struct msmsdcc_host *)cmd->data; |
56a8b5b8 | 212 | |
6ac9ea69 | 213 | msmsdcc_writel(host, host->cmd_timeout, MMCIDATATIMER); |
d0719e59 SM |
214 | msmsdcc_writel(host, (unsigned int)host->curr.xfer_size, |
215 | MMCIDATALENGTH); | |
4a268e08 ST |
216 | msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) & |
217 | (~MCI_IRQ_PIO)) | host->cmd_pio_irqmask, MMCIMASK0); | |
6ac9ea69 | 218 | msmsdcc_writel(host, host->cmd_datactrl, MMCIDATACTRL); |
56a8b5b8 | 219 | |
6ac9ea69 SM |
220 | if (host->cmd_cmd) { |
221 | msmsdcc_start_command_exec(host, | |
222 | (u32) host->cmd_cmd->arg, | |
223 | (u32) host->cmd_c); | |
224 | } | |
56a8b5b8 SM |
225 | host->dma.active = 1; |
226 | } | |
227 | ||
9d2bd738 | 228 | static void |
62612cf9 | 229 | msmsdcc_dma_complete_tlet(unsigned long data) |
9d2bd738 | 230 | { |
62612cf9 | 231 | struct msmsdcc_host *host = (struct msmsdcc_host *)data; |
9d2bd738 SM |
232 | unsigned long flags; |
233 | struct mmc_request *mrq; | |
62612cf9 | 234 | struct msm_dmov_errdata err; |
9d2bd738 SM |
235 | |
236 | spin_lock_irqsave(&host->lock, flags); | |
56a8b5b8 SM |
237 | host->dma.active = 0; |
238 | ||
62612cf9 | 239 | err = host->dma.err; |
9d2bd738 SM |
240 | mrq = host->curr.mrq; |
241 | BUG_ON(!mrq); | |
b3b0ca84 | 242 | WARN_ON(!mrq->data); |
9d2bd738 | 243 | |
62612cf9 | 244 | if (!(host->dma.result & DMOV_RSLT_VALID)) { |
0a7ff7c7 | 245 | pr_err("msmsdcc: Invalid DataMover result\n"); |
9d2bd738 SM |
246 | goto out; |
247 | } | |
248 | ||
62612cf9 | 249 | if (host->dma.result & DMOV_RSLT_DONE) { |
9d2bd738 SM |
250 | host->curr.data_xfered = host->curr.xfer_size; |
251 | } else { | |
252 | /* Error or flush */ | |
62612cf9 | 253 | if (host->dma.result & DMOV_RSLT_ERROR) |
0a7ff7c7 | 254 | pr_err("%s: DMA error (0x%.8x)\n", |
62612cf9 ST |
255 | mmc_hostname(host->mmc), host->dma.result); |
256 | if (host->dma.result & DMOV_RSLT_FLUSH) | |
0a7ff7c7 | 257 | pr_err("%s: DMA channel flushed (0x%.8x)\n", |
62612cf9 ST |
258 | mmc_hostname(host->mmc), host->dma.result); |
259 | ||
260 | pr_err("Flush data: %.8x %.8x %.8x %.8x %.8x %.8x\n", | |
261 | err.flush[0], err.flush[1], err.flush[2], | |
262 | err.flush[3], err.flush[4], err.flush[5]); | |
b08bb35d ST |
263 | |
264 | msmsdcc_reset_and_restore(host); | |
9d2bd738 SM |
265 | if (!mrq->data->error) |
266 | mrq->data->error = -EIO; | |
267 | } | |
9d2bd738 SM |
268 | dma_unmap_sg(mmc_dev(host->mmc), host->dma.sg, host->dma.num_ents, |
269 | host->dma.dir); | |
270 | ||
9d2bd738 | 271 | host->dma.sg = NULL; |
56a8b5b8 | 272 | host->dma.busy = 0; |
9d2bd738 | 273 | |
0c521ccb | 274 | if (host->curr.got_dataend || mrq->data->error) { |
9d2bd738 SM |
275 | |
276 | /* | |
277 | * If we've already gotten our DATAEND / DATABLKEND | |
278 | * for this request, then complete it through here. | |
279 | */ | |
280 | msmsdcc_stop_data(host); | |
281 | ||
282 | if (!mrq->data->error) | |
283 | host->curr.data_xfered = host->curr.xfer_size; | |
284 | if (!mrq->data->stop || mrq->cmd->error) { | |
9d2bd738 SM |
285 | host->curr.mrq = NULL; |
286 | host->curr.cmd = NULL; | |
287 | mrq->data->bytes_xfered = host->curr.data_xfered; | |
288 | ||
289 | spin_unlock_irqrestore(&host->lock, flags); | |
f4748499 | 290 | #if BUSCLK_PWRSAVE |
c7fc9370 | 291 | msmsdcc_disable_clocks(host, 1); |
f4748499 | 292 | #endif |
9d2bd738 SM |
293 | mmc_request_done(host->mmc, mrq); |
294 | return; | |
295 | } else | |
296 | msmsdcc_start_command(host, mrq->data->stop, 0); | |
297 | } | |
298 | ||
299 | out: | |
300 | spin_unlock_irqrestore(&host->lock, flags); | |
301 | return; | |
302 | } | |
303 | ||
62612cf9 ST |
304 | static void |
305 | msmsdcc_dma_complete_func(struct msm_dmov_cmd *cmd, | |
306 | unsigned int result, | |
307 | struct msm_dmov_errdata *err) | |
308 | { | |
309 | struct msmsdcc_dma_data *dma_data = | |
310 | container_of(cmd, struct msmsdcc_dma_data, hdr); | |
311 | struct msmsdcc_host *host = dma_data->host; | |
312 | ||
313 | dma_data->result = result; | |
314 | if (err) | |
315 | memcpy(&dma_data->err, err, sizeof(struct msm_dmov_errdata)); | |
316 | ||
317 | tasklet_schedule(&host->dma_tlet); | |
318 | } | |
319 | ||
9d2bd738 SM |
320 | static int validate_dma(struct msmsdcc_host *host, struct mmc_data *data) |
321 | { | |
322 | if (host->dma.channel == -1) | |
323 | return -ENOENT; | |
324 | ||
325 | if ((data->blksz * data->blocks) < MCI_FIFOSIZE) | |
326 | return -EINVAL; | |
327 | if ((data->blksz * data->blocks) % MCI_FIFOSIZE) | |
328 | return -EINVAL; | |
329 | return 0; | |
330 | } | |
331 | ||
332 | static int msmsdcc_config_dma(struct msmsdcc_host *host, struct mmc_data *data) | |
333 | { | |
334 | struct msmsdcc_nc_dmadata *nc; | |
335 | dmov_box *box; | |
336 | uint32_t rows; | |
337 | uint32_t crci; | |
338 | unsigned int n; | |
339 | int i, rc; | |
340 | struct scatterlist *sg = data->sg; | |
341 | ||
342 | rc = validate_dma(host, data); | |
343 | if (rc) | |
344 | return rc; | |
345 | ||
346 | host->dma.sg = data->sg; | |
347 | host->dma.num_ents = data->sg_len; | |
348 | ||
56a8b5b8 SM |
349 | BUG_ON(host->dma.num_ents > NR_SG); /* Prevent memory corruption */ |
350 | ||
9d2bd738 SM |
351 | nc = host->dma.nc; |
352 | ||
75d14528 JP |
353 | switch (host->pdev_id) { |
354 | case 1: | |
9d2bd738 | 355 | crci = MSMSDCC_CRCI_SDC1; |
75d14528 JP |
356 | break; |
357 | case 2: | |
9d2bd738 | 358 | crci = MSMSDCC_CRCI_SDC2; |
75d14528 JP |
359 | break; |
360 | case 3: | |
9d2bd738 | 361 | crci = MSMSDCC_CRCI_SDC3; |
75d14528 JP |
362 | break; |
363 | case 4: | |
9d2bd738 | 364 | crci = MSMSDCC_CRCI_SDC4; |
75d14528 JP |
365 | break; |
366 | default: | |
9d2bd738 SM |
367 | host->dma.sg = NULL; |
368 | host->dma.num_ents = 0; | |
369 | return -ENOENT; | |
370 | } | |
371 | ||
372 | if (data->flags & MMC_DATA_READ) | |
373 | host->dma.dir = DMA_FROM_DEVICE; | |
374 | else | |
375 | host->dma.dir = DMA_TO_DEVICE; | |
376 | ||
377 | host->curr.user_pages = 0; | |
378 | ||
9d2bd738 | 379 | box = &nc->cmd[0]; |
9d2bd738 | 380 | |
208028de DW |
381 | /* location of command block must be 64 bit aligned */ |
382 | BUG_ON(host->dma.cmd_busaddr & 0x07); | |
383 | ||
384 | nc->cmdptr = (host->dma.cmd_busaddr >> 3) | CMD_PTR_LP; | |
385 | host->dma.hdr.cmdptr = DMOV_CMD_PTR_LIST | | |
386 | DMOV_CMD_ADDR(host->dma.cmdptr_busaddr); | |
387 | host->dma.hdr.complete_func = msmsdcc_dma_complete_func; | |
388 | ||
389 | n = dma_map_sg(mmc_dev(host->mmc), host->dma.sg, | |
390 | host->dma.num_ents, host->dma.dir); | |
391 | if (n == 0) { | |
a3c76eb9 | 392 | pr_err("%s: Unable to map in all sg elements\n", |
208028de DW |
393 | mmc_hostname(host->mmc)); |
394 | host->dma.sg = NULL; | |
395 | host->dma.num_ents = 0; | |
396 | return -ENOMEM; | |
397 | } | |
398 | ||
399 | for_each_sg(host->dma.sg, sg, n, i) { | |
400 | ||
401 | box->cmd = CMD_MODE_BOX; | |
56a8b5b8 | 402 | |
208028de | 403 | if (i == n - 1) |
9d2bd738 SM |
404 | box->cmd |= CMD_LC; |
405 | rows = (sg_dma_len(sg) % MCI_FIFOSIZE) ? | |
406 | (sg_dma_len(sg) / MCI_FIFOSIZE) + 1 : | |
407 | (sg_dma_len(sg) / MCI_FIFOSIZE) ; | |
408 | ||
409 | if (data->flags & MMC_DATA_READ) { | |
410 | box->src_row_addr = msmsdcc_fifo_addr(host); | |
411 | box->dst_row_addr = sg_dma_address(sg); | |
412 | ||
413 | box->src_dst_len = (MCI_FIFOSIZE << 16) | | |
414 | (MCI_FIFOSIZE); | |
415 | box->row_offset = MCI_FIFOSIZE; | |
416 | ||
417 | box->num_rows = rows * ((1 << 16) + 1); | |
418 | box->cmd |= CMD_SRC_CRCI(crci); | |
419 | } else { | |
420 | box->src_row_addr = sg_dma_address(sg); | |
421 | box->dst_row_addr = msmsdcc_fifo_addr(host); | |
422 | ||
423 | box->src_dst_len = (MCI_FIFOSIZE << 16) | | |
424 | (MCI_FIFOSIZE); | |
425 | box->row_offset = (MCI_FIFOSIZE << 16); | |
426 | ||
427 | box->num_rows = rows * ((1 << 16) + 1); | |
428 | box->cmd |= CMD_DST_CRCI(crci); | |
429 | } | |
430 | box++; | |
56a8b5b8 SM |
431 | } |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static int | |
437 | snoop_cccr_abort(struct mmc_command *cmd) | |
438 | { | |
439 | if ((cmd->opcode == 52) && | |
440 | (cmd->arg & 0x80000000) && | |
441 | (((cmd->arg >> 9) & 0x1ffff) == SDIO_CCCR_ABORT)) | |
442 | return 1; | |
9d2bd738 SM |
443 | return 0; |
444 | } | |
445 | ||
446 | static void | |
56a8b5b8 SM |
447 | msmsdcc_start_command_deferred(struct msmsdcc_host *host, |
448 | struct mmc_command *cmd, u32 *c) | |
449 | { | |
450 | *c |= (cmd->opcode | MCI_CPSM_ENABLE); | |
451 | ||
452 | if (cmd->flags & MMC_RSP_PRESENT) { | |
453 | if (cmd->flags & MMC_RSP_136) | |
454 | *c |= MCI_CPSM_LONGRSP; | |
455 | *c |= MCI_CPSM_RESPONSE; | |
456 | } | |
457 | ||
458 | if (/*interrupt*/0) | |
459 | *c |= MCI_CPSM_INTERRUPT; | |
460 | ||
461 | if ((((cmd->opcode == 17) || (cmd->opcode == 18)) || | |
462 | ((cmd->opcode == 24) || (cmd->opcode == 25))) || | |
463 | (cmd->opcode == 53)) | |
464 | *c |= MCI_CSPM_DATCMD; | |
465 | ||
d5137bdd ST |
466 | if (host->prog_scan && (cmd->opcode == 12)) { |
467 | *c |= MCI_CPSM_PROGENA; | |
468 | host->prog_enable = true; | |
469 | } | |
470 | ||
56a8b5b8 SM |
471 | if (cmd == cmd->mrq->stop) |
472 | *c |= MCI_CSPM_MCIABORT; | |
473 | ||
474 | if (snoop_cccr_abort(cmd)) | |
475 | *c |= MCI_CSPM_MCIABORT; | |
476 | ||
477 | if (host->curr.cmd != NULL) { | |
a3c76eb9 | 478 | pr_err("%s: Overlapping command requests\n", |
56a8b5b8 SM |
479 | mmc_hostname(host->mmc)); |
480 | } | |
481 | host->curr.cmd = cmd; | |
482 | } | |
483 | ||
484 | static void | |
485 | msmsdcc_start_data(struct msmsdcc_host *host, struct mmc_data *data, | |
486 | struct mmc_command *cmd, u32 c) | |
9d2bd738 SM |
487 | { |
488 | unsigned int datactrl, timeout; | |
489 | unsigned long long clks; | |
9d2bd738 SM |
490 | unsigned int pio_irqmask = 0; |
491 | ||
492 | host->curr.data = data; | |
493 | host->curr.xfer_size = data->blksz * data->blocks; | |
494 | host->curr.xfer_remain = host->curr.xfer_size; | |
495 | host->curr.data_xfered = 0; | |
496 | host->curr.got_dataend = 0; | |
9d2bd738 SM |
497 | |
498 | memset(&host->pio, 0, sizeof(host->pio)); | |
499 | ||
9d2bd738 SM |
500 | datactrl = MCI_DPSM_ENABLE | (data->blksz << 4); |
501 | ||
502 | if (!msmsdcc_config_dma(host, data)) | |
503 | datactrl |= MCI_DPSM_DMAENABLE; | |
504 | else { | |
505 | host->pio.sg = data->sg; | |
506 | host->pio.sg_len = data->sg_len; | |
507 | host->pio.sg_off = 0; | |
508 | ||
509 | if (data->flags & MMC_DATA_READ) { | |
510 | pio_irqmask = MCI_RXFIFOHALFFULLMASK; | |
511 | if (host->curr.xfer_remain < MCI_FIFOSIZE) | |
512 | pio_irqmask |= MCI_RXDATAAVLBLMASK; | |
513 | } else | |
514 | pio_irqmask = MCI_TXFIFOHALFEMPTYMASK; | |
515 | } | |
516 | ||
517 | if (data->flags & MMC_DATA_READ) | |
518 | datactrl |= MCI_DPSM_DIRECTION; | |
519 | ||
56a8b5b8 SM |
520 | clks = (unsigned long long)data->timeout_ns * host->clk_rate; |
521 | do_div(clks, NSEC_PER_SEC); | |
522 | timeout = data->timeout_clks + (unsigned int)clks*2 ; | |
9d2bd738 SM |
523 | |
524 | if (datactrl & MCI_DPSM_DMAENABLE) { | |
56a8b5b8 SM |
525 | /* Save parameters for the exec function */ |
526 | host->cmd_timeout = timeout; | |
527 | host->cmd_pio_irqmask = pio_irqmask; | |
528 | host->cmd_datactrl = datactrl; | |
529 | host->cmd_cmd = cmd; | |
530 | ||
531 | host->dma.hdr.execute_func = msmsdcc_dma_exec_func; | |
532 | host->dma.hdr.data = (void *)host; | |
9d2bd738 | 533 | host->dma.busy = 1; |
56a8b5b8 SM |
534 | |
535 | if (cmd) { | |
536 | msmsdcc_start_command_deferred(host, cmd, &c); | |
537 | host->cmd_c = c; | |
538 | } | |
9d2bd738 | 539 | msm_dmov_enqueue_cmd(host->dma.channel, &host->dma.hdr); |
d5137bdd ST |
540 | if (data->flags & MMC_DATA_WRITE) |
541 | host->prog_scan = true; | |
56a8b5b8 SM |
542 | } else { |
543 | msmsdcc_writel(host, timeout, MMCIDATATIMER); | |
9d2bd738 | 544 | |
56a8b5b8 SM |
545 | msmsdcc_writel(host, host->curr.xfer_size, MMCIDATALENGTH); |
546 | ||
4a268e08 ST |
547 | msmsdcc_writel(host, (msmsdcc_readl(host, MMCIMASK0) & |
548 | (~MCI_IRQ_PIO)) | pio_irqmask, MMCIMASK0); | |
549 | ||
56a8b5b8 SM |
550 | msmsdcc_writel(host, datactrl, MMCIDATACTRL); |
551 | ||
552 | if (cmd) { | |
553 | /* Daisy-chain the command if requested */ | |
554 | msmsdcc_start_command(host, cmd, c); | |
555 | } | |
9d2bd738 SM |
556 | } |
557 | } | |
558 | ||
559 | static void | |
560 | msmsdcc_start_command(struct msmsdcc_host *host, struct mmc_command *cmd, u32 c) | |
561 | { | |
9d2bd738 SM |
562 | if (cmd == cmd->mrq->stop) |
563 | c |= MCI_CSPM_MCIABORT; | |
564 | ||
9d2bd738 SM |
565 | host->stats.cmds++; |
566 | ||
56a8b5b8 SM |
567 | msmsdcc_start_command_deferred(host, cmd, &c); |
568 | msmsdcc_start_command_exec(host, cmd->arg, c); | |
9d2bd738 SM |
569 | } |
570 | ||
571 | static void | |
572 | msmsdcc_data_err(struct msmsdcc_host *host, struct mmc_data *data, | |
573 | unsigned int status) | |
574 | { | |
575 | if (status & MCI_DATACRCFAIL) { | |
0a7ff7c7 JP |
576 | pr_err("%s: Data CRC error\n", mmc_hostname(host->mmc)); |
577 | pr_err("%s: opcode 0x%.8x\n", __func__, | |
9d2bd738 | 578 | data->mrq->cmd->opcode); |
0a7ff7c7 | 579 | pr_err("%s: blksz %d, blocks %d\n", __func__, |
9d2bd738 SM |
580 | data->blksz, data->blocks); |
581 | data->error = -EILSEQ; | |
582 | } else if (status & MCI_DATATIMEOUT) { | |
0a7ff7c7 | 583 | pr_err("%s: Data timeout\n", mmc_hostname(host->mmc)); |
9d2bd738 SM |
584 | data->error = -ETIMEDOUT; |
585 | } else if (status & MCI_RXOVERRUN) { | |
0a7ff7c7 | 586 | pr_err("%s: RX overrun\n", mmc_hostname(host->mmc)); |
9d2bd738 SM |
587 | data->error = -EIO; |
588 | } else if (status & MCI_TXUNDERRUN) { | |
0a7ff7c7 | 589 | pr_err("%s: TX underrun\n", mmc_hostname(host->mmc)); |
9d2bd738 SM |
590 | data->error = -EIO; |
591 | } else { | |
0a7ff7c7 JP |
592 | pr_err("%s: Unknown error (0x%.8x)\n", |
593 | mmc_hostname(host->mmc), status); | |
9d2bd738 SM |
594 | data->error = -EIO; |
595 | } | |
596 | } | |
597 | ||
598 | ||
599 | static int | |
600 | msmsdcc_pio_read(struct msmsdcc_host *host, char *buffer, unsigned int remain) | |
601 | { | |
9d2bd738 SM |
602 | uint32_t *ptr = (uint32_t *) buffer; |
603 | int count = 0; | |
604 | ||
71dd9106 ST |
605 | if (remain % 4) |
606 | remain = ((remain >> 2) + 1) << 2; | |
607 | ||
8b1c2ba2 SM |
608 | while (msmsdcc_readl(host, MMCISTATUS) & MCI_RXDATAAVLBL) { |
609 | *ptr = msmsdcc_readl(host, MMCIFIFO + (count % MCI_FIFOSIZE)); | |
9d2bd738 SM |
610 | ptr++; |
611 | count += sizeof(uint32_t); | |
612 | ||
613 | remain -= sizeof(uint32_t); | |
614 | if (remain == 0) | |
615 | break; | |
616 | } | |
617 | return count; | |
618 | } | |
619 | ||
620 | static int | |
621 | msmsdcc_pio_write(struct msmsdcc_host *host, char *buffer, | |
622 | unsigned int remain, u32 status) | |
623 | { | |
624 | void __iomem *base = host->base; | |
625 | char *ptr = buffer; | |
626 | ||
627 | do { | |
71dd9106 | 628 | unsigned int count, maxcnt, sz; |
9d2bd738 SM |
629 | |
630 | maxcnt = status & MCI_TXFIFOEMPTY ? MCI_FIFOSIZE : | |
631 | MCI_FIFOHALFSIZE; | |
632 | count = min(remain, maxcnt); | |
633 | ||
71dd9106 ST |
634 | sz = count % 4 ? (count >> 2) + 1 : (count >> 2); |
635 | writesl(base + MMCIFIFO, ptr, sz); | |
9d2bd738 SM |
636 | ptr += count; |
637 | remain -= count; | |
638 | ||
639 | if (remain == 0) | |
640 | break; | |
641 | ||
8b1c2ba2 | 642 | status = msmsdcc_readl(host, MMCISTATUS); |
9d2bd738 SM |
643 | } while (status & MCI_TXFIFOHALFEMPTY); |
644 | ||
645 | return ptr - buffer; | |
646 | } | |
647 | ||
648 | static int | |
649 | msmsdcc_spin_on_status(struct msmsdcc_host *host, uint32_t mask, int maxspin) | |
650 | { | |
651 | while (maxspin) { | |
8b1c2ba2 | 652 | if ((msmsdcc_readl(host, MMCISTATUS) & mask)) |
9d2bd738 SM |
653 | return 0; |
654 | udelay(1); | |
655 | --maxspin; | |
656 | } | |
657 | return -ETIMEDOUT; | |
658 | } | |
659 | ||
1cd22969 | 660 | static irqreturn_t |
9d2bd738 SM |
661 | msmsdcc_pio_irq(int irq, void *dev_id) |
662 | { | |
663 | struct msmsdcc_host *host = dev_id; | |
9d2bd738 | 664 | uint32_t status; |
4a268e08 | 665 | u32 mci_mask0; |
9d2bd738 | 666 | |
8b1c2ba2 | 667 | status = msmsdcc_readl(host, MMCISTATUS); |
4a268e08 ST |
668 | mci_mask0 = msmsdcc_readl(host, MMCIMASK0); |
669 | ||
670 | if (((mci_mask0 & status) & MCI_IRQ_PIO) == 0) | |
671 | return IRQ_NONE; | |
9d2bd738 SM |
672 | |
673 | do { | |
674 | unsigned long flags; | |
675 | unsigned int remain, len; | |
676 | char *buffer; | |
677 | ||
678 | if (!(status & (MCI_TXFIFOHALFEMPTY | MCI_RXDATAAVLBL))) { | |
679 | if (host->curr.xfer_remain == 0 || !msmsdcc_piopoll) | |
680 | break; | |
681 | ||
682 | if (msmsdcc_spin_on_status(host, | |
683 | (MCI_TXFIFOHALFEMPTY | | |
684 | MCI_RXDATAAVLBL), | |
685 | PIO_SPINMAX)) { | |
686 | break; | |
687 | } | |
688 | } | |
689 | ||
690 | /* Map the current scatter buffer */ | |
691 | local_irq_save(flags); | |
692 | buffer = kmap_atomic(sg_page(host->pio.sg), | |
693 | KM_BIO_SRC_IRQ) + host->pio.sg->offset; | |
694 | buffer += host->pio.sg_off; | |
695 | remain = host->pio.sg->length - host->pio.sg_off; | |
696 | len = 0; | |
697 | if (status & MCI_RXACTIVE) | |
698 | len = msmsdcc_pio_read(host, buffer, remain); | |
699 | if (status & MCI_TXACTIVE) | |
700 | len = msmsdcc_pio_write(host, buffer, remain, status); | |
701 | ||
702 | /* Unmap the buffer */ | |
703 | kunmap_atomic(buffer, KM_BIO_SRC_IRQ); | |
704 | local_irq_restore(flags); | |
705 | ||
706 | host->pio.sg_off += len; | |
707 | host->curr.xfer_remain -= len; | |
708 | host->curr.data_xfered += len; | |
709 | remain -= len; | |
710 | ||
711 | if (remain == 0) { | |
712 | /* This sg page is full - do some housekeeping */ | |
713 | if (status & MCI_RXACTIVE && host->curr.user_pages) | |
714 | flush_dcache_page(sg_page(host->pio.sg)); | |
715 | ||
716 | if (!--host->pio.sg_len) { | |
717 | memset(&host->pio, 0, sizeof(host->pio)); | |
718 | break; | |
719 | } | |
720 | ||
721 | /* Advance to next sg */ | |
722 | host->pio.sg++; | |
723 | host->pio.sg_off = 0; | |
724 | } | |
725 | ||
8b1c2ba2 | 726 | status = msmsdcc_readl(host, MMCISTATUS); |
9d2bd738 SM |
727 | } while (1); |
728 | ||
729 | if (status & MCI_RXACTIVE && host->curr.xfer_remain < MCI_FIFOSIZE) | |
4a268e08 ST |
730 | msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) | |
731 | MCI_RXDATAAVLBLMASK, MMCIMASK0); | |
9d2bd738 SM |
732 | |
733 | if (!host->curr.xfer_remain) | |
4a268e08 ST |
734 | msmsdcc_writel(host, (mci_mask0 & (~MCI_IRQ_PIO)) | 0, |
735 | MMCIMASK0); | |
9d2bd738 SM |
736 | |
737 | return IRQ_HANDLED; | |
738 | } | |
739 | ||
740 | static void msmsdcc_do_cmdirq(struct msmsdcc_host *host, uint32_t status) | |
741 | { | |
742 | struct mmc_command *cmd = host->curr.cmd; | |
9d2bd738 SM |
743 | |
744 | host->curr.cmd = NULL; | |
8b1c2ba2 SM |
745 | cmd->resp[0] = msmsdcc_readl(host, MMCIRESPONSE0); |
746 | cmd->resp[1] = msmsdcc_readl(host, MMCIRESPONSE1); | |
747 | cmd->resp[2] = msmsdcc_readl(host, MMCIRESPONSE2); | |
748 | cmd->resp[3] = msmsdcc_readl(host, MMCIRESPONSE3); | |
9d2bd738 | 749 | |
9d2bd738 SM |
750 | if (status & MCI_CMDTIMEOUT) { |
751 | cmd->error = -ETIMEDOUT; | |
752 | } else if (status & MCI_CMDCRCFAIL && | |
753 | cmd->flags & MMC_RSP_CRC) { | |
0a7ff7c7 | 754 | pr_err("%s: Command CRC error\n", mmc_hostname(host->mmc)); |
9d2bd738 SM |
755 | cmd->error = -EILSEQ; |
756 | } | |
757 | ||
758 | if (!cmd->data || cmd->error) { | |
759 | if (host->curr.data && host->dma.sg) | |
760 | msm_dmov_stop_cmd(host->dma.channel, | |
761 | &host->dma.hdr, 0); | |
762 | else if (host->curr.data) { /* Non DMA */ | |
b08bb35d | 763 | msmsdcc_reset_and_restore(host); |
9d2bd738 SM |
764 | msmsdcc_stop_data(host); |
765 | msmsdcc_request_end(host, cmd->mrq); | |
d5137bdd ST |
766 | } else { /* host->data == NULL */ |
767 | if (!cmd->error && host->prog_enable) { | |
768 | if (status & MCI_PROGDONE) { | |
769 | host->prog_scan = false; | |
770 | host->prog_enable = false; | |
771 | msmsdcc_request_end(host, cmd->mrq); | |
772 | } else { | |
773 | host->curr.cmd = cmd; | |
774 | } | |
775 | } else { | |
776 | if (host->prog_enable) { | |
777 | host->prog_scan = false; | |
778 | host->prog_enable = false; | |
779 | } | |
780 | msmsdcc_request_end(host, cmd->mrq); | |
781 | } | |
782 | } | |
56a8b5b8 SM |
783 | } else if (cmd->data) |
784 | if (!(cmd->data->flags & MMC_DATA_READ)) | |
785 | msmsdcc_start_data(host, cmd->data, | |
786 | NULL, 0); | |
9d2bd738 SM |
787 | } |
788 | ||
b5a74d60 JP |
789 | static void |
790 | msmsdcc_handle_irq_data(struct msmsdcc_host *host, u32 status, | |
791 | void __iomem *base) | |
792 | { | |
793 | struct mmc_data *data = host->curr.data; | |
794 | ||
56a8b5b8 | 795 | if (status & (MCI_CMDSENT | MCI_CMDRESPEND | MCI_CMDCRCFAIL | |
d5137bdd | 796 | MCI_CMDTIMEOUT | MCI_PROGDONE) && host->curr.cmd) { |
56a8b5b8 SM |
797 | msmsdcc_do_cmdirq(host, status); |
798 | } | |
799 | ||
b5a74d60 JP |
800 | if (!data) |
801 | return; | |
802 | ||
803 | /* Check for data errors */ | |
804 | if (status & (MCI_DATACRCFAIL | MCI_DATATIMEOUT | | |
805 | MCI_TXUNDERRUN | MCI_RXOVERRUN)) { | |
806 | msmsdcc_data_err(host, data, status); | |
807 | host->curr.data_xfered = 0; | |
808 | if (host->dma.sg) | |
809 | msm_dmov_stop_cmd(host->dma.channel, | |
810 | &host->dma.hdr, 0); | |
811 | else { | |
b08bb35d | 812 | msmsdcc_reset_and_restore(host); |
b3b0ca84 SM |
813 | if (host->curr.data) |
814 | msmsdcc_stop_data(host); | |
b5a74d60 JP |
815 | if (!data->stop) |
816 | msmsdcc_request_end(host, data->mrq); | |
817 | else | |
818 | msmsdcc_start_command(host, data->stop, 0); | |
819 | } | |
820 | } | |
821 | ||
822 | /* Check for data done */ | |
823 | if (!host->curr.got_dataend && (status & MCI_DATAEND)) | |
824 | host->curr.got_dataend = 1; | |
825 | ||
b5a74d60 JP |
826 | /* |
827 | * If DMA is still in progress, we complete via the completion handler | |
828 | */ | |
0c521ccb | 829 | if (host->curr.got_dataend && !host->dma.busy) { |
b5a74d60 JP |
830 | /* |
831 | * There appears to be an issue in the controller where | |
832 | * if you request a small block transfer (< fifo size), | |
833 | * you may get your DATAEND/DATABLKEND irq without the | |
834 | * PIO data irq. | |
835 | * | |
836 | * Check to see if there is still data to be read, | |
837 | * and simulate a PIO irq. | |
838 | */ | |
839 | if (readl(base + MMCISTATUS) & MCI_RXDATAAVLBL) | |
840 | msmsdcc_pio_irq(1, host); | |
841 | ||
842 | msmsdcc_stop_data(host); | |
843 | if (!data->error) | |
844 | host->curr.data_xfered = host->curr.xfer_size; | |
845 | ||
846 | if (!data->stop) | |
847 | msmsdcc_request_end(host, data->mrq); | |
848 | else | |
849 | msmsdcc_start_command(host, data->stop, 0); | |
850 | } | |
851 | } | |
852 | ||
9d2bd738 SM |
853 | static irqreturn_t |
854 | msmsdcc_irq(int irq, void *dev_id) | |
855 | { | |
856 | struct msmsdcc_host *host = dev_id; | |
857 | void __iomem *base = host->base; | |
858 | u32 status; | |
859 | int ret = 0; | |
860 | int cardint = 0; | |
861 | ||
862 | spin_lock(&host->lock); | |
863 | ||
864 | do { | |
8b1c2ba2 | 865 | status = msmsdcc_readl(host, MMCISTATUS); |
0c521ccb | 866 | status &= msmsdcc_readl(host, MMCIMASK0); |
4a268e08 ST |
867 | if ((status & (~MCI_IRQ_PIO)) == 0) |
868 | break; | |
8b1c2ba2 | 869 | msmsdcc_writel(host, status, MMCICLEAR); |
9d2bd738 | 870 | |
865c8064 SM |
871 | if (status & MCI_SDIOINTR) |
872 | status &= ~MCI_SDIOINTR; | |
9d2bd738 | 873 | |
865c8064 SM |
874 | if (!status) |
875 | break; | |
9d2bd738 | 876 | |
b5a74d60 | 877 | msmsdcc_handle_irq_data(host, status, base); |
9d2bd738 SM |
878 | |
879 | if (status & MCI_SDIOINTOPER) { | |
880 | cardint = 1; | |
881 | status &= ~MCI_SDIOINTOPER; | |
882 | } | |
883 | ret = 1; | |
884 | } while (status); | |
885 | ||
886 | spin_unlock(&host->lock); | |
887 | ||
888 | /* | |
889 | * We have to delay handling the card interrupt as it calls | |
890 | * back into the driver. | |
891 | */ | |
892 | if (cardint) | |
893 | mmc_signal_sdio_irq(host->mmc); | |
894 | ||
895 | return IRQ_RETVAL(ret); | |
896 | } | |
897 | ||
898 | static void | |
899 | msmsdcc_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
900 | { | |
901 | struct msmsdcc_host *host = mmc_priv(mmc); | |
902 | unsigned long flags; | |
903 | ||
904 | WARN_ON(host->curr.mrq != NULL); | |
905 | WARN_ON(host->pwr == 0); | |
906 | ||
907 | spin_lock_irqsave(&host->lock, flags); | |
908 | ||
909 | host->stats.reqs++; | |
910 | ||
911 | if (host->eject) { | |
912 | if (mrq->data && !(mrq->data->flags & MMC_DATA_READ)) { | |
913 | mrq->cmd->error = 0; | |
914 | mrq->data->bytes_xfered = mrq->data->blksz * | |
915 | mrq->data->blocks; | |
916 | } else | |
917 | mrq->cmd->error = -ENOMEDIUM; | |
918 | ||
919 | spin_unlock_irqrestore(&host->lock, flags); | |
920 | mmc_request_done(mmc, mrq); | |
921 | return; | |
922 | } | |
923 | ||
d0719e59 | 924 | msmsdcc_enable_clocks(host); |
9d2bd738 | 925 | |
9d2bd738 SM |
926 | host->curr.mrq = mrq; |
927 | ||
928 | if (mrq->data && mrq->data->flags & MMC_DATA_READ) | |
56a8b5b8 SM |
929 | /* Queue/read data, daisy-chain command when data starts */ |
930 | msmsdcc_start_data(host, mrq->data, mrq->cmd, 0); | |
931 | else | |
932 | msmsdcc_start_command(host, mrq->cmd, 0); | |
9d2bd738 SM |
933 | |
934 | if (host->cmdpoll && !msmsdcc_spin_on_status(host, | |
935 | MCI_CMDRESPEND|MCI_CMDCRCFAIL|MCI_CMDTIMEOUT, | |
936 | CMD_SPINMAX)) { | |
8b1c2ba2 | 937 | uint32_t status = msmsdcc_readl(host, MMCISTATUS); |
9d2bd738 | 938 | msmsdcc_do_cmdirq(host, status); |
8b1c2ba2 SM |
939 | msmsdcc_writel(host, |
940 | MCI_CMDRESPEND | MCI_CMDCRCFAIL | MCI_CMDTIMEOUT, | |
941 | MMCICLEAR); | |
9d2bd738 SM |
942 | host->stats.cmdpoll_hits++; |
943 | } else { | |
944 | host->stats.cmdpoll_misses++; | |
9d2bd738 SM |
945 | } |
946 | spin_unlock_irqrestore(&host->lock, flags); | |
947 | } | |
948 | ||
7a89248a ST |
949 | static void msmsdcc_setup_gpio(struct msmsdcc_host *host, bool enable) |
950 | { | |
951 | struct msm_mmc_gpio_data *curr; | |
952 | int i, rc = 0; | |
953 | ||
435f3e38 | 954 | if (!host->plat->gpio_data || host->gpio_config_status == enable) |
7a89248a ST |
955 | return; |
956 | ||
957 | curr = host->plat->gpio_data; | |
958 | for (i = 0; i < curr->size; i++) { | |
959 | if (enable) { | |
960 | rc = gpio_request(curr->gpio[i].no, | |
961 | curr->gpio[i].name); | |
962 | if (rc) { | |
963 | pr_err("%s: gpio_request(%d, %s) failed %d\n", | |
964 | mmc_hostname(host->mmc), | |
965 | curr->gpio[i].no, | |
966 | curr->gpio[i].name, rc); | |
967 | goto free_gpios; | |
968 | } | |
969 | } else { | |
970 | gpio_free(curr->gpio[i].no); | |
971 | } | |
972 | } | |
973 | host->gpio_config_status = enable; | |
974 | return; | |
975 | ||
976 | free_gpios: | |
977 | for (; i >= 0; i--) | |
978 | gpio_free(curr->gpio[i].no); | |
979 | } | |
980 | ||
9d2bd738 SM |
981 | static void |
982 | msmsdcc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
983 | { | |
984 | struct msmsdcc_host *host = mmc_priv(mmc); | |
985 | u32 clk = 0, pwr = 0; | |
986 | int rc; | |
4adbbcc7 | 987 | unsigned long flags; |
9d2bd738 | 988 | |
c7fc9370 | 989 | spin_lock_irqsave(&host->lock, flags); |
9d2bd738 | 990 | |
d0719e59 SM |
991 | msmsdcc_enable_clocks(host); |
992 | ||
7a89248a ST |
993 | spin_unlock_irqrestore(&host->lock, flags); |
994 | ||
865c8064 | 995 | if (ios->clock) { |
9d2bd738 SM |
996 | if (ios->clock != host->clk_rate) { |
997 | rc = clk_set_rate(host->clk, ios->clock); | |
998 | if (rc < 0) | |
0a7ff7c7 JP |
999 | pr_err("%s: Error setting clock rate (%d)\n", |
1000 | mmc_hostname(host->mmc), rc); | |
9d2bd738 SM |
1001 | else |
1002 | host->clk_rate = ios->clock; | |
1003 | } | |
1004 | clk |= MCI_CLK_ENABLE; | |
1005 | } | |
1006 | ||
1007 | if (ios->bus_width == MMC_BUS_WIDTH_4) | |
1008 | clk |= (2 << 10); /* Set WIDEBUS */ | |
1009 | ||
1010 | if (ios->clock > 400000 && msmsdcc_pwrsave) | |
1011 | clk |= (1 << 9); /* PWRSAVE */ | |
1012 | ||
1013 | clk |= (1 << 12); /* FLOW_ENA */ | |
1014 | clk |= (1 << 15); /* feedback clock */ | |
1015 | ||
1016 | if (host->plat->translate_vdd) | |
1017 | pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd); | |
1018 | ||
1019 | switch (ios->power_mode) { | |
1020 | case MMC_POWER_OFF: | |
7a89248a | 1021 | msmsdcc_setup_gpio(host, false); |
9d2bd738 SM |
1022 | break; |
1023 | case MMC_POWER_UP: | |
1024 | pwr |= MCI_PWR_UP; | |
7a89248a | 1025 | msmsdcc_setup_gpio(host, true); |
9d2bd738 SM |
1026 | break; |
1027 | case MMC_POWER_ON: | |
9d2bd738 SM |
1028 | pwr |= MCI_PWR_ON; |
1029 | break; | |
1030 | } | |
1031 | ||
1032 | if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
1033 | pwr |= MCI_OD; | |
1034 | ||
8b1c2ba2 | 1035 | msmsdcc_writel(host, clk, MMCICLOCK); |
9d2bd738 SM |
1036 | |
1037 | if (host->pwr != pwr) { | |
1038 | host->pwr = pwr; | |
8b1c2ba2 | 1039 | msmsdcc_writel(host, pwr, MMCIPOWER); |
9d2bd738 | 1040 | } |
f4748499 | 1041 | #if BUSCLK_PWRSAVE |
7a89248a | 1042 | spin_lock_irqsave(&host->lock, flags); |
c7fc9370 | 1043 | msmsdcc_disable_clocks(host, 1); |
4adbbcc7 | 1044 | spin_unlock_irqrestore(&host->lock, flags); |
7a89248a | 1045 | #endif |
9d2bd738 SM |
1046 | } |
1047 | ||
1048 | static void msmsdcc_enable_sdio_irq(struct mmc_host *mmc, int enable) | |
1049 | { | |
1050 | struct msmsdcc_host *host = mmc_priv(mmc); | |
1051 | unsigned long flags; | |
1052 | u32 status; | |
1053 | ||
1054 | spin_lock_irqsave(&host->lock, flags); | |
1055 | if (msmsdcc_sdioirq == 1) { | |
8b1c2ba2 | 1056 | status = msmsdcc_readl(host, MMCIMASK0); |
9d2bd738 SM |
1057 | if (enable) |
1058 | status |= MCI_SDIOINTOPERMASK; | |
1059 | else | |
1060 | status &= ~MCI_SDIOINTOPERMASK; | |
1061 | host->saved_irq0mask = status; | |
8b1c2ba2 | 1062 | msmsdcc_writel(host, status, MMCIMASK0); |
9d2bd738 SM |
1063 | } |
1064 | spin_unlock_irqrestore(&host->lock, flags); | |
1065 | } | |
1066 | ||
e91957e7 AT |
1067 | static void msmsdcc_init_card(struct mmc_host *mmc, struct mmc_card *card) |
1068 | { | |
1069 | struct msmsdcc_host *host = mmc_priv(mmc); | |
1070 | ||
1071 | if (host->plat->init_card) | |
1072 | host->plat->init_card(card); | |
1073 | } | |
1074 | ||
9d2bd738 SM |
1075 | static const struct mmc_host_ops msmsdcc_ops = { |
1076 | .request = msmsdcc_request, | |
1077 | .set_ios = msmsdcc_set_ios, | |
1078 | .enable_sdio_irq = msmsdcc_enable_sdio_irq, | |
e91957e7 | 1079 | .init_card = msmsdcc_init_card, |
9d2bd738 SM |
1080 | }; |
1081 | ||
1082 | static void | |
1083 | msmsdcc_check_status(unsigned long data) | |
1084 | { | |
1085 | struct msmsdcc_host *host = (struct msmsdcc_host *)data; | |
1086 | unsigned int status; | |
1087 | ||
1088 | if (!host->plat->status) { | |
1089 | mmc_detect_change(host->mmc, 0); | |
1090 | goto out; | |
1091 | } | |
1092 | ||
1093 | status = host->plat->status(mmc_dev(host->mmc)); | |
1094 | host->eject = !status; | |
1095 | if (status ^ host->oldstat) { | |
0a7ff7c7 JP |
1096 | pr_info("%s: Slot status change detected (%d -> %d)\n", |
1097 | mmc_hostname(host->mmc), host->oldstat, status); | |
9d2bd738 SM |
1098 | if (status) |
1099 | mmc_detect_change(host->mmc, (5 * HZ) / 2); | |
1100 | else | |
1101 | mmc_detect_change(host->mmc, 0); | |
1102 | } | |
1103 | ||
1104 | host->oldstat = status; | |
1105 | ||
1106 | out: | |
1107 | if (host->timer.function) | |
1108 | mod_timer(&host->timer, jiffies + HZ); | |
1109 | } | |
1110 | ||
1111 | static irqreturn_t | |
1112 | msmsdcc_platform_status_irq(int irq, void *dev_id) | |
1113 | { | |
1114 | struct msmsdcc_host *host = dev_id; | |
1115 | ||
a3c76eb9 | 1116 | pr_debug("%s: %d\n", __func__, irq); |
9d2bd738 SM |
1117 | msmsdcc_check_status((unsigned long) host); |
1118 | return IRQ_HANDLED; | |
1119 | } | |
1120 | ||
1121 | static void | |
1122 | msmsdcc_status_notify_cb(int card_present, void *dev_id) | |
1123 | { | |
1124 | struct msmsdcc_host *host = dev_id; | |
1125 | ||
a3c76eb9 | 1126 | pr_debug("%s: card_present %d\n", mmc_hostname(host->mmc), |
9d2bd738 SM |
1127 | card_present); |
1128 | msmsdcc_check_status((unsigned long) host); | |
1129 | } | |
1130 | ||
9d2bd738 | 1131 | static void |
865c8064 | 1132 | msmsdcc_busclk_expired(unsigned long _data) |
9d2bd738 SM |
1133 | { |
1134 | struct msmsdcc_host *host = (struct msmsdcc_host *) _data; | |
9d2bd738 | 1135 | |
865c8064 | 1136 | if (host->clks_on) |
c7fc9370 | 1137 | msmsdcc_disable_clocks(host, 0); |
9d2bd738 SM |
1138 | } |
1139 | ||
1140 | static int | |
1141 | msmsdcc_init_dma(struct msmsdcc_host *host) | |
1142 | { | |
1143 | memset(&host->dma, 0, sizeof(struct msmsdcc_dma_data)); | |
1144 | host->dma.host = host; | |
1145 | host->dma.channel = -1; | |
1146 | ||
1147 | if (!host->dmares) | |
1148 | return -ENODEV; | |
1149 | ||
1150 | host->dma.nc = dma_alloc_coherent(NULL, | |
1151 | sizeof(struct msmsdcc_nc_dmadata), | |
1152 | &host->dma.nc_busaddr, | |
1153 | GFP_KERNEL); | |
1154 | if (host->dma.nc == NULL) { | |
0a7ff7c7 | 1155 | pr_err("Unable to allocate DMA buffer\n"); |
9d2bd738 SM |
1156 | return -ENOMEM; |
1157 | } | |
1158 | memset(host->dma.nc, 0x00, sizeof(struct msmsdcc_nc_dmadata)); | |
1159 | host->dma.cmd_busaddr = host->dma.nc_busaddr; | |
1160 | host->dma.cmdptr_busaddr = host->dma.nc_busaddr + | |
1161 | offsetof(struct msmsdcc_nc_dmadata, cmdptr); | |
1162 | host->dma.channel = host->dmares->start; | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
9d2bd738 SM |
1167 | static int |
1168 | msmsdcc_probe(struct platform_device *pdev) | |
1169 | { | |
b5d643de | 1170 | struct msm_mmc_platform_data *plat = pdev->dev.platform_data; |
9d2bd738 SM |
1171 | struct msmsdcc_host *host; |
1172 | struct mmc_host *mmc; | |
1173 | struct resource *cmd_irqres = NULL; | |
9d2bd738 SM |
1174 | struct resource *stat_irqres = NULL; |
1175 | struct resource *memres = NULL; | |
1176 | struct resource *dmares = NULL; | |
1177 | int ret; | |
1178 | ||
1179 | /* must have platform data */ | |
1180 | if (!plat) { | |
0a7ff7c7 | 1181 | pr_err("%s: Platform data not available\n", __func__); |
9d2bd738 SM |
1182 | ret = -EINVAL; |
1183 | goto out; | |
1184 | } | |
1185 | ||
1186 | if (pdev->id < 1 || pdev->id > 4) | |
1187 | return -EINVAL; | |
1188 | ||
1189 | if (pdev->resource == NULL || pdev->num_resources < 2) { | |
0a7ff7c7 | 1190 | pr_err("%s: Invalid resource\n", __func__); |
9d2bd738 SM |
1191 | return -ENXIO; |
1192 | } | |
1193 | ||
1194 | memres = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1195 | dmares = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1196 | cmd_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ, | |
1197 | "cmd_irq"); | |
9d2bd738 SM |
1198 | stat_irqres = platform_get_resource_byname(pdev, IORESOURCE_IRQ, |
1199 | "status_irq"); | |
1200 | ||
4a92fe80 | 1201 | if (!cmd_irqres || !memres) { |
0a7ff7c7 | 1202 | pr_err("%s: Invalid resource\n", __func__); |
9d2bd738 SM |
1203 | return -ENXIO; |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | * Setup our host structure | |
1208 | */ | |
1209 | ||
1210 | mmc = mmc_alloc_host(sizeof(struct msmsdcc_host), &pdev->dev); | |
1211 | if (!mmc) { | |
1212 | ret = -ENOMEM; | |
1213 | goto out; | |
1214 | } | |
1215 | ||
1216 | host = mmc_priv(mmc); | |
1217 | host->pdev_id = pdev->id; | |
1218 | host->plat = plat; | |
1219 | host->mmc = mmc; | |
56a8b5b8 | 1220 | host->curr.cmd = NULL; |
19207f05 ST |
1221 | init_timer(&host->busclk_timer); |
1222 | host->busclk_timer.data = (unsigned long) host; | |
1223 | host->busclk_timer.function = msmsdcc_busclk_expired; | |
1224 | ||
9d2bd738 SM |
1225 | |
1226 | host->cmdpoll = 1; | |
1227 | ||
1228 | host->base = ioremap(memres->start, PAGE_SIZE); | |
1229 | if (!host->base) { | |
1230 | ret = -ENOMEM; | |
dce7c756 | 1231 | goto host_free; |
9d2bd738 SM |
1232 | } |
1233 | ||
1234 | host->cmd_irqres = cmd_irqres; | |
9d2bd738 SM |
1235 | host->memres = memres; |
1236 | host->dmares = dmares; | |
1237 | spin_lock_init(&host->lock); | |
1238 | ||
62612cf9 ST |
1239 | tasklet_init(&host->dma_tlet, msmsdcc_dma_complete_tlet, |
1240 | (unsigned long)host); | |
1241 | ||
9d2bd738 SM |
1242 | /* |
1243 | * Setup DMA | |
1244 | */ | |
190657c9 SJ |
1245 | if (host->dmares) { |
1246 | ret = msmsdcc_init_dma(host); | |
1247 | if (ret) | |
1248 | goto ioremap_free; | |
1249 | } else { | |
1250 | host->dma.channel = -1; | |
1251 | } | |
9d2bd738 | 1252 | |
4adbbcc7 | 1253 | /* Get our clocks */ |
9d2bd738 SM |
1254 | host->pclk = clk_get(&pdev->dev, "sdc_pclk"); |
1255 | if (IS_ERR(host->pclk)) { | |
1256 | ret = PTR_ERR(host->pclk); | |
dce7c756 | 1257 | goto dma_free; |
9d2bd738 SM |
1258 | } |
1259 | ||
9d2bd738 SM |
1260 | host->clk = clk_get(&pdev->dev, "sdc_clk"); |
1261 | if (IS_ERR(host->clk)) { | |
1262 | ret = PTR_ERR(host->clk); | |
4adbbcc7 | 1263 | goto pclk_put; |
9d2bd738 SM |
1264 | } |
1265 | ||
9d2bd738 SM |
1266 | ret = clk_set_rate(host->clk, msmsdcc_fmin); |
1267 | if (ret) { | |
0a7ff7c7 | 1268 | pr_err("%s: Clock rate set failed (%d)\n", __func__, ret); |
514d9eda | 1269 | goto clk_put; |
9d2bd738 SM |
1270 | } |
1271 | ||
514d9eda ST |
1272 | /* Enable clocks */ |
1273 | ret = msmsdcc_enable_clocks(host); | |
1274 | if (ret) | |
1275 | goto clk_put; | |
1276 | ||
4adbbcc7 | 1277 | host->pclk_rate = clk_get_rate(host->pclk); |
9d2bd738 SM |
1278 | host->clk_rate = clk_get_rate(host->clk); |
1279 | ||
9d2bd738 SM |
1280 | /* |
1281 | * Setup MMC host structure | |
1282 | */ | |
1283 | mmc->ops = &msmsdcc_ops; | |
1284 | mmc->f_min = msmsdcc_fmin; | |
1285 | mmc->f_max = msmsdcc_fmax; | |
1286 | mmc->ocr_avail = plat->ocr_mask; | |
1287 | ||
1288 | if (msmsdcc_4bit) | |
1289 | mmc->caps |= MMC_CAP_4_BIT_DATA; | |
1290 | if (msmsdcc_sdioirq) | |
1291 | mmc->caps |= MMC_CAP_SDIO_IRQ; | |
1292 | mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED; | |
1293 | ||
a36274e0 | 1294 | mmc->max_segs = NR_SG; |
9d2bd738 SM |
1295 | mmc->max_blk_size = 4096; /* MCI_DATA_CTL BLOCKSIZE up to 4096 */ |
1296 | mmc->max_blk_count = 65536; | |
1297 | ||
1298 | mmc->max_req_size = 33554432; /* MCI_DATA_LENGTH is 25 bits */ | |
1299 | mmc->max_seg_size = mmc->max_req_size; | |
1300 | ||
8b1c2ba2 SM |
1301 | msmsdcc_writel(host, 0, MMCIMASK0); |
1302 | msmsdcc_writel(host, 0x5e007ff, MMCICLEAR); | |
9d2bd738 | 1303 | |
8b1c2ba2 | 1304 | msmsdcc_writel(host, MCI_IRQENABLE, MMCIMASK0); |
9d2bd738 SM |
1305 | host->saved_irq0mask = MCI_IRQENABLE; |
1306 | ||
1307 | /* | |
1308 | * Setup card detect change | |
1309 | */ | |
1310 | ||
1311 | memset(&host->timer, 0, sizeof(host->timer)); | |
1312 | ||
1313 | if (stat_irqres && !(stat_irqres->flags & IORESOURCE_DISABLED)) { | |
1314 | unsigned long irqflags = IRQF_SHARED | | |
1315 | (stat_irqres->flags & IRQF_TRIGGER_MASK); | |
1316 | ||
1317 | host->stat_irq = stat_irqres->start; | |
1318 | ret = request_irq(host->stat_irq, | |
1319 | msmsdcc_platform_status_irq, | |
1320 | irqflags, | |
1321 | DRIVER_NAME " (slot)", | |
1322 | host); | |
1323 | if (ret) { | |
0a7ff7c7 JP |
1324 | pr_err("%s: Unable to get slot IRQ %d (%d)\n", |
1325 | mmc_hostname(mmc), host->stat_irq, ret); | |
9d2bd738 SM |
1326 | goto clk_disable; |
1327 | } | |
1328 | } else if (plat->register_status_notify) { | |
1329 | plat->register_status_notify(msmsdcc_status_notify_cb, host); | |
1330 | } else if (!plat->status) | |
0a7ff7c7 | 1331 | pr_err("%s: No card detect facilities available\n", |
9d2bd738 SM |
1332 | mmc_hostname(mmc)); |
1333 | else { | |
1334 | init_timer(&host->timer); | |
1335 | host->timer.data = (unsigned long)host; | |
1336 | host->timer.function = msmsdcc_check_status; | |
1337 | host->timer.expires = jiffies + HZ; | |
1338 | add_timer(&host->timer); | |
1339 | } | |
1340 | ||
1341 | if (plat->status) { | |
1342 | host->oldstat = host->plat->status(mmc_dev(host->mmc)); | |
1343 | host->eject = !host->oldstat; | |
1344 | } | |
1345 | ||
9d2bd738 SM |
1346 | ret = request_irq(cmd_irqres->start, msmsdcc_irq, IRQF_SHARED, |
1347 | DRIVER_NAME " (cmd)", host); | |
1348 | if (ret) | |
1349 | goto stat_irq_free; | |
1350 | ||
4a92fe80 | 1351 | ret = request_irq(cmd_irqres->start, msmsdcc_pio_irq, IRQF_SHARED, |
9d2bd738 SM |
1352 | DRIVER_NAME " (pio)", host); |
1353 | if (ret) | |
1354 | goto cmd_irq_free; | |
1355 | ||
1356 | mmc_set_drvdata(pdev, mmc); | |
1357 | mmc_add_host(mmc); | |
1358 | ||
0a7ff7c7 JP |
1359 | pr_info("%s: Qualcomm MSM SDCC at 0x%016llx irq %d,%d dma %d\n", |
1360 | mmc_hostname(mmc), (unsigned long long)memres->start, | |
1361 | (unsigned int) cmd_irqres->start, | |
1362 | (unsigned int) host->stat_irq, host->dma.channel); | |
1363 | pr_info("%s: 4 bit data mode %s\n", mmc_hostname(mmc), | |
1364 | (mmc->caps & MMC_CAP_4_BIT_DATA ? "enabled" : "disabled")); | |
1365 | pr_info("%s: MMC clock %u -> %u Hz, PCLK %u Hz\n", | |
1366 | mmc_hostname(mmc), msmsdcc_fmin, msmsdcc_fmax, host->pclk_rate); | |
1367 | pr_info("%s: Slot eject status = %d\n", mmc_hostname(mmc), host->eject); | |
1368 | pr_info("%s: Power save feature enable = %d\n", | |
1369 | mmc_hostname(mmc), msmsdcc_pwrsave); | |
9d2bd738 SM |
1370 | |
1371 | if (host->dma.channel != -1) { | |
0a7ff7c7 JP |
1372 | pr_info("%s: DM non-cached buffer at %p, dma_addr 0x%.8x\n", |
1373 | mmc_hostname(mmc), host->dma.nc, host->dma.nc_busaddr); | |
1374 | pr_info("%s: DM cmd busaddr 0x%.8x, cmdptr busaddr 0x%.8x\n", | |
1375 | mmc_hostname(mmc), host->dma.cmd_busaddr, | |
1376 | host->dma.cmdptr_busaddr); | |
9d2bd738 | 1377 | } else |
0a7ff7c7 | 1378 | pr_info("%s: PIO transfer enabled\n", mmc_hostname(mmc)); |
9d2bd738 | 1379 | if (host->timer.function) |
0a7ff7c7 | 1380 | pr_info("%s: Polling status mode enabled\n", mmc_hostname(mmc)); |
9d2bd738 SM |
1381 | |
1382 | return 0; | |
1383 | cmd_irq_free: | |
1384 | free_irq(cmd_irqres->start, host); | |
1385 | stat_irq_free: | |
1386 | if (host->stat_irq) | |
1387 | free_irq(host->stat_irq, host); | |
1388 | clk_disable: | |
c7fc9370 | 1389 | msmsdcc_disable_clocks(host, 0); |
9d2bd738 SM |
1390 | clk_put: |
1391 | clk_put(host->clk); | |
9d2bd738 SM |
1392 | pclk_put: |
1393 | clk_put(host->pclk); | |
dce7c756 | 1394 | dma_free: |
190657c9 SJ |
1395 | if (host->dmares) |
1396 | dma_free_coherent(NULL, sizeof(struct msmsdcc_nc_dmadata), | |
1397 | host->dma.nc, host->dma.nc_busaddr); | |
dce7c756 ST |
1398 | ioremap_free: |
1399 | tasklet_kill(&host->dma_tlet); | |
1400 | iounmap(host->base); | |
9d2bd738 SM |
1401 | host_free: |
1402 | mmc_free_host(mmc); | |
1403 | out: | |
1404 | return ret; | |
1405 | } | |
1406 | ||
08ecfde4 DW |
1407 | #ifdef CONFIG_PM |
1408 | #ifdef CONFIG_MMC_MSM7X00A_RESUME_IN_WQ | |
1409 | static void | |
1410 | do_resume_work(struct work_struct *work) | |
1411 | { | |
1412 | struct msmsdcc_host *host = | |
1413 | container_of(work, struct msmsdcc_host, resume_task); | |
1414 | struct mmc_host *mmc = host->mmc; | |
1415 | ||
1416 | if (mmc) { | |
1417 | mmc_resume_host(mmc); | |
1418 | if (host->stat_irq) | |
1419 | enable_irq(host->stat_irq); | |
1420 | } | |
1421 | } | |
1422 | #endif | |
1423 | ||
1424 | ||
9d2bd738 SM |
1425 | static int |
1426 | msmsdcc_suspend(struct platform_device *dev, pm_message_t state) | |
1427 | { | |
1428 | struct mmc_host *mmc = mmc_get_drvdata(dev); | |
1429 | int rc = 0; | |
1430 | ||
1431 | if (mmc) { | |
1432 | struct msmsdcc_host *host = mmc_priv(mmc); | |
1433 | ||
1434 | if (host->stat_irq) | |
1435 | disable_irq(host->stat_irq); | |
1436 | ||
1437 | if (mmc->card && mmc->card->type != MMC_TYPE_SDIO) | |
1a13f8fa | 1438 | rc = mmc_suspend_host(mmc); |
d0719e59 | 1439 | if (!rc) |
8b1c2ba2 | 1440 | msmsdcc_writel(host, 0, MMCIMASK0); |
c7fc9370 SM |
1441 | if (host->clks_on) |
1442 | msmsdcc_disable_clocks(host, 0); | |
9d2bd738 SM |
1443 | } |
1444 | return rc; | |
1445 | } | |
1446 | ||
1447 | static int | |
1448 | msmsdcc_resume(struct platform_device *dev) | |
1449 | { | |
1450 | struct mmc_host *mmc = mmc_get_drvdata(dev); | |
9d2bd738 SM |
1451 | |
1452 | if (mmc) { | |
1453 | struct msmsdcc_host *host = mmc_priv(mmc); | |
1454 | ||
c7fc9370 | 1455 | msmsdcc_enable_clocks(host); |
9d2bd738 | 1456 | |
8b1c2ba2 | 1457 | msmsdcc_writel(host, host->saved_irq0mask, MMCIMASK0); |
9d2bd738 SM |
1458 | |
1459 | if (mmc->card && mmc->card->type != MMC_TYPE_SDIO) | |
1460 | mmc_resume_host(mmc); | |
5b8a2fb3 | 1461 | if (host->stat_irq) |
9d2bd738 | 1462 | enable_irq(host->stat_irq); |
f4748499 | 1463 | #if BUSCLK_PWRSAVE |
c7fc9370 | 1464 | msmsdcc_disable_clocks(host, 1); |
f4748499 | 1465 | #endif |
9d2bd738 SM |
1466 | } |
1467 | return 0; | |
1468 | } | |
08ecfde4 DW |
1469 | #else |
1470 | #define msmsdcc_suspend 0 | |
1471 | #define msmsdcc_resume 0 | |
1472 | #endif | |
9d2bd738 SM |
1473 | |
1474 | static struct platform_driver msmsdcc_driver = { | |
1475 | .probe = msmsdcc_probe, | |
1476 | .suspend = msmsdcc_suspend, | |
1477 | .resume = msmsdcc_resume, | |
1478 | .driver = { | |
1479 | .name = "msm_sdcc", | |
1480 | }, | |
1481 | }; | |
1482 | ||
1483 | static int __init msmsdcc_init(void) | |
1484 | { | |
1485 | return platform_driver_register(&msmsdcc_driver); | |
1486 | } | |
1487 | ||
1488 | static void __exit msmsdcc_exit(void) | |
1489 | { | |
1490 | platform_driver_unregister(&msmsdcc_driver); | |
1491 | } | |
1492 | ||
1493 | module_init(msmsdcc_init); | |
1494 | module_exit(msmsdcc_exit); | |
1495 | ||
1496 | MODULE_DESCRIPTION("Qualcomm MSM 7X00A Multimedia Card Interface driver"); | |
1497 | MODULE_LICENSE("GPL"); |