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f95f3850 WN |
1 | /* |
2 | * Synopsys DesignWare Multimedia Card Interface driver | |
3 | * (Based on NXP driver for lpc 31xx) | |
4 | * | |
5 | * Copyright (C) 2009 NXP Semiconductors | |
6 | * Copyright (C) 2009, 2010 Imagination Technologies Ltd. | |
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 as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/blkdev.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/debugfs.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/platform_device.h> | |
f95f3850 WN |
25 | #include <linux/seq_file.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/stat.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/irq.h> | |
30 | #include <linux/mmc/host.h> | |
31 | #include <linux/mmc/mmc.h> | |
32 | #include <linux/mmc/dw_mmc.h> | |
33 | #include <linux/bitops.h> | |
c07946a3 | 34 | #include <linux/regulator/consumer.h> |
1791b13e | 35 | #include <linux/workqueue.h> |
f95f3850 WN |
36 | |
37 | #include "dw_mmc.h" | |
38 | ||
39 | /* Common flag combinations */ | |
40 | #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DTO | SDMMC_INT_DCRC | \ | |
41 | SDMMC_INT_HTO | SDMMC_INT_SBE | \ | |
42 | SDMMC_INT_EBE) | |
43 | #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ | |
44 | SDMMC_INT_RESP_ERR) | |
45 | #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ | |
46 | DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE) | |
47 | #define DW_MCI_SEND_STATUS 1 | |
48 | #define DW_MCI_RECV_STATUS 2 | |
49 | #define DW_MCI_DMA_THRESHOLD 16 | |
50 | ||
51 | #ifdef CONFIG_MMC_DW_IDMAC | |
52 | struct idmac_desc { | |
53 | u32 des0; /* Control Descriptor */ | |
54 | #define IDMAC_DES0_DIC BIT(1) | |
55 | #define IDMAC_DES0_LD BIT(2) | |
56 | #define IDMAC_DES0_FD BIT(3) | |
57 | #define IDMAC_DES0_CH BIT(4) | |
58 | #define IDMAC_DES0_ER BIT(5) | |
59 | #define IDMAC_DES0_CES BIT(30) | |
60 | #define IDMAC_DES0_OWN BIT(31) | |
61 | ||
62 | u32 des1; /* Buffer sizes */ | |
63 | #define IDMAC_SET_BUFFER1_SIZE(d, s) \ | |
9b7bbe10 | 64 | ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff)) |
f95f3850 WN |
65 | |
66 | u32 des2; /* buffer 1 physical address */ | |
67 | ||
68 | u32 des3; /* buffer 2 physical address */ | |
69 | }; | |
70 | #endif /* CONFIG_MMC_DW_IDMAC */ | |
71 | ||
72 | /** | |
73 | * struct dw_mci_slot - MMC slot state | |
74 | * @mmc: The mmc_host representing this slot. | |
75 | * @host: The MMC controller this slot is using. | |
76 | * @ctype: Card type for this slot. | |
77 | * @mrq: mmc_request currently being processed or waiting to be | |
78 | * processed, or NULL when the slot is idle. | |
79 | * @queue_node: List node for placing this node in the @queue list of | |
80 | * &struct dw_mci. | |
81 | * @clock: Clock rate configured by set_ios(). Protected by host->lock. | |
82 | * @flags: Random state bits associated with the slot. | |
83 | * @id: Number of this slot. | |
84 | * @last_detect_state: Most recently observed card detect state. | |
85 | */ | |
86 | struct dw_mci_slot { | |
87 | struct mmc_host *mmc; | |
88 | struct dw_mci *host; | |
89 | ||
90 | u32 ctype; | |
91 | ||
92 | struct mmc_request *mrq; | |
93 | struct list_head queue_node; | |
94 | ||
95 | unsigned int clock; | |
96 | unsigned long flags; | |
97 | #define DW_MMC_CARD_PRESENT 0 | |
98 | #define DW_MMC_CARD_NEED_INIT 1 | |
99 | int id; | |
100 | int last_detect_state; | |
101 | }; | |
102 | ||
103 | #if defined(CONFIG_DEBUG_FS) | |
104 | static int dw_mci_req_show(struct seq_file *s, void *v) | |
105 | { | |
106 | struct dw_mci_slot *slot = s->private; | |
107 | struct mmc_request *mrq; | |
108 | struct mmc_command *cmd; | |
109 | struct mmc_command *stop; | |
110 | struct mmc_data *data; | |
111 | ||
112 | /* Make sure we get a consistent snapshot */ | |
113 | spin_lock_bh(&slot->host->lock); | |
114 | mrq = slot->mrq; | |
115 | ||
116 | if (mrq) { | |
117 | cmd = mrq->cmd; | |
118 | data = mrq->data; | |
119 | stop = mrq->stop; | |
120 | ||
121 | if (cmd) | |
122 | seq_printf(s, | |
123 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
124 | cmd->opcode, cmd->arg, cmd->flags, | |
125 | cmd->resp[0], cmd->resp[1], cmd->resp[2], | |
126 | cmd->resp[2], cmd->error); | |
127 | if (data) | |
128 | seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", | |
129 | data->bytes_xfered, data->blocks, | |
130 | data->blksz, data->flags, data->error); | |
131 | if (stop) | |
132 | seq_printf(s, | |
133 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
134 | stop->opcode, stop->arg, stop->flags, | |
135 | stop->resp[0], stop->resp[1], stop->resp[2], | |
136 | stop->resp[2], stop->error); | |
137 | } | |
138 | ||
139 | spin_unlock_bh(&slot->host->lock); | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | static int dw_mci_req_open(struct inode *inode, struct file *file) | |
145 | { | |
146 | return single_open(file, dw_mci_req_show, inode->i_private); | |
147 | } | |
148 | ||
149 | static const struct file_operations dw_mci_req_fops = { | |
150 | .owner = THIS_MODULE, | |
151 | .open = dw_mci_req_open, | |
152 | .read = seq_read, | |
153 | .llseek = seq_lseek, | |
154 | .release = single_release, | |
155 | }; | |
156 | ||
157 | static int dw_mci_regs_show(struct seq_file *s, void *v) | |
158 | { | |
159 | seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); | |
160 | seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); | |
161 | seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); | |
162 | seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); | |
163 | seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); | |
164 | seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | static int dw_mci_regs_open(struct inode *inode, struct file *file) | |
170 | { | |
171 | return single_open(file, dw_mci_regs_show, inode->i_private); | |
172 | } | |
173 | ||
174 | static const struct file_operations dw_mci_regs_fops = { | |
175 | .owner = THIS_MODULE, | |
176 | .open = dw_mci_regs_open, | |
177 | .read = seq_read, | |
178 | .llseek = seq_lseek, | |
179 | .release = single_release, | |
180 | }; | |
181 | ||
182 | static void dw_mci_init_debugfs(struct dw_mci_slot *slot) | |
183 | { | |
184 | struct mmc_host *mmc = slot->mmc; | |
185 | struct dw_mci *host = slot->host; | |
186 | struct dentry *root; | |
187 | struct dentry *node; | |
188 | ||
189 | root = mmc->debugfs_root; | |
190 | if (!root) | |
191 | return; | |
192 | ||
193 | node = debugfs_create_file("regs", S_IRUSR, root, host, | |
194 | &dw_mci_regs_fops); | |
195 | if (!node) | |
196 | goto err; | |
197 | ||
198 | node = debugfs_create_file("req", S_IRUSR, root, slot, | |
199 | &dw_mci_req_fops); | |
200 | if (!node) | |
201 | goto err; | |
202 | ||
203 | node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); | |
204 | if (!node) | |
205 | goto err; | |
206 | ||
207 | node = debugfs_create_x32("pending_events", S_IRUSR, root, | |
208 | (u32 *)&host->pending_events); | |
209 | if (!node) | |
210 | goto err; | |
211 | ||
212 | node = debugfs_create_x32("completed_events", S_IRUSR, root, | |
213 | (u32 *)&host->completed_events); | |
214 | if (!node) | |
215 | goto err; | |
216 | ||
217 | return; | |
218 | ||
219 | err: | |
220 | dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); | |
221 | } | |
222 | #endif /* defined(CONFIG_DEBUG_FS) */ | |
223 | ||
224 | static void dw_mci_set_timeout(struct dw_mci *host) | |
225 | { | |
226 | /* timeout (maximum) */ | |
227 | mci_writel(host, TMOUT, 0xffffffff); | |
228 | } | |
229 | ||
230 | static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) | |
231 | { | |
232 | struct mmc_data *data; | |
233 | u32 cmdr; | |
234 | cmd->error = -EINPROGRESS; | |
235 | ||
236 | cmdr = cmd->opcode; | |
237 | ||
238 | if (cmdr == MMC_STOP_TRANSMISSION) | |
239 | cmdr |= SDMMC_CMD_STOP; | |
240 | else | |
241 | cmdr |= SDMMC_CMD_PRV_DAT_WAIT; | |
242 | ||
243 | if (cmd->flags & MMC_RSP_PRESENT) { | |
244 | /* We expect a response, so set this bit */ | |
245 | cmdr |= SDMMC_CMD_RESP_EXP; | |
246 | if (cmd->flags & MMC_RSP_136) | |
247 | cmdr |= SDMMC_CMD_RESP_LONG; | |
248 | } | |
249 | ||
250 | if (cmd->flags & MMC_RSP_CRC) | |
251 | cmdr |= SDMMC_CMD_RESP_CRC; | |
252 | ||
253 | data = cmd->data; | |
254 | if (data) { | |
255 | cmdr |= SDMMC_CMD_DAT_EXP; | |
256 | if (data->flags & MMC_DATA_STREAM) | |
257 | cmdr |= SDMMC_CMD_STRM_MODE; | |
258 | if (data->flags & MMC_DATA_WRITE) | |
259 | cmdr |= SDMMC_CMD_DAT_WR; | |
260 | } | |
261 | ||
262 | return cmdr; | |
263 | } | |
264 | ||
265 | static void dw_mci_start_command(struct dw_mci *host, | |
266 | struct mmc_command *cmd, u32 cmd_flags) | |
267 | { | |
268 | host->cmd = cmd; | |
62ca8034 | 269 | dev_vdbg(&host->dev, |
f95f3850 WN |
270 | "start command: ARGR=0x%08x CMDR=0x%08x\n", |
271 | cmd->arg, cmd_flags); | |
272 | ||
273 | mci_writel(host, CMDARG, cmd->arg); | |
274 | wmb(); | |
275 | ||
276 | mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); | |
277 | } | |
278 | ||
279 | static void send_stop_cmd(struct dw_mci *host, struct mmc_data *data) | |
280 | { | |
281 | dw_mci_start_command(host, data->stop, host->stop_cmdr); | |
282 | } | |
283 | ||
284 | /* DMA interface functions */ | |
285 | static void dw_mci_stop_dma(struct dw_mci *host) | |
286 | { | |
03e8cb53 | 287 | if (host->using_dma) { |
f95f3850 WN |
288 | host->dma_ops->stop(host); |
289 | host->dma_ops->cleanup(host); | |
290 | } else { | |
291 | /* Data transfer was stopped by the interrupt handler */ | |
292 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
293 | } | |
294 | } | |
295 | ||
9aa51408 SJ |
296 | static int dw_mci_get_dma_dir(struct mmc_data *data) |
297 | { | |
298 | if (data->flags & MMC_DATA_WRITE) | |
299 | return DMA_TO_DEVICE; | |
300 | else | |
301 | return DMA_FROM_DEVICE; | |
302 | } | |
303 | ||
9beee912 | 304 | #ifdef CONFIG_MMC_DW_IDMAC |
f95f3850 WN |
305 | static void dw_mci_dma_cleanup(struct dw_mci *host) |
306 | { | |
307 | struct mmc_data *data = host->data; | |
308 | ||
309 | if (data) | |
9aa51408 SJ |
310 | if (!data->host_cookie) |
311 | dma_unmap_sg(&host->dev, | |
312 | data->sg, | |
313 | data->sg_len, | |
314 | dw_mci_get_dma_dir(data)); | |
f95f3850 WN |
315 | } |
316 | ||
317 | static void dw_mci_idmac_stop_dma(struct dw_mci *host) | |
318 | { | |
319 | u32 temp; | |
320 | ||
321 | /* Disable and reset the IDMAC interface */ | |
322 | temp = mci_readl(host, CTRL); | |
323 | temp &= ~SDMMC_CTRL_USE_IDMAC; | |
324 | temp |= SDMMC_CTRL_DMA_RESET; | |
325 | mci_writel(host, CTRL, temp); | |
326 | ||
327 | /* Stop the IDMAC running */ | |
328 | temp = mci_readl(host, BMOD); | |
a5289a43 | 329 | temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); |
f95f3850 WN |
330 | mci_writel(host, BMOD, temp); |
331 | } | |
332 | ||
333 | static void dw_mci_idmac_complete_dma(struct dw_mci *host) | |
334 | { | |
335 | struct mmc_data *data = host->data; | |
336 | ||
62ca8034 | 337 | dev_vdbg(&host->dev, "DMA complete\n"); |
f95f3850 WN |
338 | |
339 | host->dma_ops->cleanup(host); | |
340 | ||
341 | /* | |
342 | * If the card was removed, data will be NULL. No point in trying to | |
343 | * send the stop command or waiting for NBUSY in this case. | |
344 | */ | |
345 | if (data) { | |
346 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
347 | tasklet_schedule(&host->tasklet); | |
348 | } | |
349 | } | |
350 | ||
351 | static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, | |
352 | unsigned int sg_len) | |
353 | { | |
354 | int i; | |
355 | struct idmac_desc *desc = host->sg_cpu; | |
356 | ||
357 | for (i = 0; i < sg_len; i++, desc++) { | |
358 | unsigned int length = sg_dma_len(&data->sg[i]); | |
359 | u32 mem_addr = sg_dma_address(&data->sg[i]); | |
360 | ||
361 | /* Set the OWN bit and disable interrupts for this descriptor */ | |
362 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH; | |
363 | ||
364 | /* Buffer length */ | |
365 | IDMAC_SET_BUFFER1_SIZE(desc, length); | |
366 | ||
367 | /* Physical address to DMA to/from */ | |
368 | desc->des2 = mem_addr; | |
369 | } | |
370 | ||
371 | /* Set first descriptor */ | |
372 | desc = host->sg_cpu; | |
373 | desc->des0 |= IDMAC_DES0_FD; | |
374 | ||
375 | /* Set last descriptor */ | |
376 | desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc); | |
377 | desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); | |
378 | desc->des0 |= IDMAC_DES0_LD; | |
379 | ||
380 | wmb(); | |
381 | } | |
382 | ||
383 | static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) | |
384 | { | |
385 | u32 temp; | |
386 | ||
387 | dw_mci_translate_sglist(host, host->data, sg_len); | |
388 | ||
389 | /* Select IDMAC interface */ | |
390 | temp = mci_readl(host, CTRL); | |
391 | temp |= SDMMC_CTRL_USE_IDMAC; | |
392 | mci_writel(host, CTRL, temp); | |
393 | ||
394 | wmb(); | |
395 | ||
396 | /* Enable the IDMAC */ | |
397 | temp = mci_readl(host, BMOD); | |
a5289a43 | 398 | temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; |
f95f3850 WN |
399 | mci_writel(host, BMOD, temp); |
400 | ||
401 | /* Start it running */ | |
402 | mci_writel(host, PLDMND, 1); | |
403 | } | |
404 | ||
405 | static int dw_mci_idmac_init(struct dw_mci *host) | |
406 | { | |
407 | struct idmac_desc *p; | |
408 | int i; | |
409 | ||
410 | /* Number of descriptors in the ring buffer */ | |
411 | host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); | |
412 | ||
413 | /* Forward link the descriptor list */ | |
414 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) | |
415 | p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1)); | |
416 | ||
417 | /* Set the last descriptor as the end-of-ring descriptor */ | |
418 | p->des3 = host->sg_dma; | |
419 | p->des0 = IDMAC_DES0_ER; | |
420 | ||
141a712a SJ |
421 | mci_writel(host, BMOD, SDMMC_IDMAC_SWRESET); |
422 | ||
f95f3850 WN |
423 | /* Mask out interrupts - get Tx & Rx complete only */ |
424 | mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI | | |
425 | SDMMC_IDMAC_INT_TI); | |
426 | ||
427 | /* Set the descriptor base address */ | |
428 | mci_writel(host, DBADDR, host->sg_dma); | |
429 | return 0; | |
430 | } | |
431 | ||
885c3e80 SJ |
432 | static struct dw_mci_dma_ops dw_mci_idmac_ops = { |
433 | .init = dw_mci_idmac_init, | |
434 | .start = dw_mci_idmac_start_dma, | |
435 | .stop = dw_mci_idmac_stop_dma, | |
436 | .complete = dw_mci_idmac_complete_dma, | |
437 | .cleanup = dw_mci_dma_cleanup, | |
438 | }; | |
439 | #endif /* CONFIG_MMC_DW_IDMAC */ | |
440 | ||
9aa51408 SJ |
441 | static int dw_mci_pre_dma_transfer(struct dw_mci *host, |
442 | struct mmc_data *data, | |
443 | bool next) | |
f95f3850 WN |
444 | { |
445 | struct scatterlist *sg; | |
9aa51408 | 446 | unsigned int i, sg_len; |
03e8cb53 | 447 | |
9aa51408 SJ |
448 | if (!next && data->host_cookie) |
449 | return data->host_cookie; | |
f95f3850 WN |
450 | |
451 | /* | |
452 | * We don't do DMA on "complex" transfers, i.e. with | |
453 | * non-word-aligned buffers or lengths. Also, we don't bother | |
454 | * with all the DMA setup overhead for short transfers. | |
455 | */ | |
456 | if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) | |
457 | return -EINVAL; | |
9aa51408 | 458 | |
f95f3850 WN |
459 | if (data->blksz & 3) |
460 | return -EINVAL; | |
461 | ||
462 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
463 | if (sg->offset & 3 || sg->length & 3) | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
9aa51408 SJ |
467 | sg_len = dma_map_sg(&host->dev, |
468 | data->sg, | |
469 | data->sg_len, | |
470 | dw_mci_get_dma_dir(data)); | |
471 | if (sg_len == 0) | |
472 | return -EINVAL; | |
03e8cb53 | 473 | |
9aa51408 SJ |
474 | if (next) |
475 | data->host_cookie = sg_len; | |
f95f3850 | 476 | |
9aa51408 SJ |
477 | return sg_len; |
478 | } | |
479 | ||
9aa51408 SJ |
480 | static void dw_mci_pre_req(struct mmc_host *mmc, |
481 | struct mmc_request *mrq, | |
482 | bool is_first_req) | |
483 | { | |
484 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
485 | struct mmc_data *data = mrq->data; | |
486 | ||
487 | if (!slot->host->use_dma || !data) | |
488 | return; | |
489 | ||
490 | if (data->host_cookie) { | |
491 | data->host_cookie = 0; | |
492 | return; | |
493 | } | |
494 | ||
495 | if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) | |
496 | data->host_cookie = 0; | |
497 | } | |
498 | ||
499 | static void dw_mci_post_req(struct mmc_host *mmc, | |
500 | struct mmc_request *mrq, | |
501 | int err) | |
502 | { | |
503 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
504 | struct mmc_data *data = mrq->data; | |
505 | ||
506 | if (!slot->host->use_dma || !data) | |
507 | return; | |
508 | ||
509 | if (data->host_cookie) | |
510 | dma_unmap_sg(&slot->host->dev, | |
511 | data->sg, | |
512 | data->sg_len, | |
513 | dw_mci_get_dma_dir(data)); | |
514 | data->host_cookie = 0; | |
515 | } | |
516 | ||
517 | static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) | |
518 | { | |
519 | int sg_len; | |
520 | u32 temp; | |
521 | ||
522 | host->using_dma = 0; | |
523 | ||
524 | /* If we don't have a channel, we can't do DMA */ | |
525 | if (!host->use_dma) | |
526 | return -ENODEV; | |
527 | ||
528 | sg_len = dw_mci_pre_dma_transfer(host, data, 0); | |
a99aa9b9 SJ |
529 | if (sg_len < 0) { |
530 | host->dma_ops->stop(host); | |
9aa51408 | 531 | return sg_len; |
a99aa9b9 | 532 | } |
9aa51408 SJ |
533 | |
534 | host->using_dma = 1; | |
f95f3850 | 535 | |
62ca8034 | 536 | dev_vdbg(&host->dev, |
f95f3850 WN |
537 | "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", |
538 | (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, | |
539 | sg_len); | |
540 | ||
541 | /* Enable the DMA interface */ | |
542 | temp = mci_readl(host, CTRL); | |
543 | temp |= SDMMC_CTRL_DMA_ENABLE; | |
544 | mci_writel(host, CTRL, temp); | |
545 | ||
546 | /* Disable RX/TX IRQs, let DMA handle it */ | |
547 | temp = mci_readl(host, INTMASK); | |
548 | temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); | |
549 | mci_writel(host, INTMASK, temp); | |
550 | ||
551 | host->dma_ops->start(host, sg_len); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) | |
557 | { | |
558 | u32 temp; | |
559 | ||
560 | data->error = -EINPROGRESS; | |
561 | ||
562 | WARN_ON(host->data); | |
563 | host->sg = NULL; | |
564 | host->data = data; | |
565 | ||
55c5efbc JH |
566 | if (data->flags & MMC_DATA_READ) |
567 | host->dir_status = DW_MCI_RECV_STATUS; | |
568 | else | |
569 | host->dir_status = DW_MCI_SEND_STATUS; | |
570 | ||
f95f3850 | 571 | if (dw_mci_submit_data_dma(host, data)) { |
f9c2a0dc SJ |
572 | int flags = SG_MITER_ATOMIC; |
573 | if (host->data->flags & MMC_DATA_READ) | |
574 | flags |= SG_MITER_TO_SG; | |
575 | else | |
576 | flags |= SG_MITER_FROM_SG; | |
577 | ||
578 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
f95f3850 | 579 | host->sg = data->sg; |
34b664a2 JH |
580 | host->part_buf_start = 0; |
581 | host->part_buf_count = 0; | |
f95f3850 | 582 | |
b40af3aa | 583 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); |
f95f3850 WN |
584 | temp = mci_readl(host, INTMASK); |
585 | temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; | |
586 | mci_writel(host, INTMASK, temp); | |
587 | ||
588 | temp = mci_readl(host, CTRL); | |
589 | temp &= ~SDMMC_CTRL_DMA_ENABLE; | |
590 | mci_writel(host, CTRL, temp); | |
591 | } | |
592 | } | |
593 | ||
594 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) | |
595 | { | |
596 | struct dw_mci *host = slot->host; | |
597 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
598 | unsigned int cmd_status = 0; | |
599 | ||
600 | mci_writel(host, CMDARG, arg); | |
601 | wmb(); | |
602 | mci_writel(host, CMD, SDMMC_CMD_START | cmd); | |
603 | ||
604 | while (time_before(jiffies, timeout)) { | |
605 | cmd_status = mci_readl(host, CMD); | |
606 | if (!(cmd_status & SDMMC_CMD_START)) | |
607 | return; | |
608 | } | |
609 | dev_err(&slot->mmc->class_dev, | |
610 | "Timeout sending command (cmd %#x arg %#x status %#x)\n", | |
611 | cmd, arg, cmd_status); | |
612 | } | |
613 | ||
614 | static void dw_mci_setup_bus(struct dw_mci_slot *slot) | |
615 | { | |
616 | struct dw_mci *host = slot->host; | |
617 | u32 div; | |
618 | ||
619 | if (slot->clock != host->current_speed) { | |
e419990b SJ |
620 | div = host->bus_hz / slot->clock; |
621 | if (host->bus_hz % slot->clock && host->bus_hz > slot->clock) | |
f95f3850 WN |
622 | /* |
623 | * move the + 1 after the divide to prevent | |
624 | * over-clocking the card. | |
625 | */ | |
e419990b SJ |
626 | div += 1; |
627 | ||
628 | div = (host->bus_hz != slot->clock) ? DIV_ROUND_UP(div, 2) : 0; | |
f95f3850 WN |
629 | |
630 | dev_info(&slot->mmc->class_dev, | |
631 | "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ" | |
632 | " div = %d)\n", slot->id, host->bus_hz, slot->clock, | |
633 | div ? ((host->bus_hz / div) >> 1) : host->bus_hz, div); | |
634 | ||
635 | /* disable clock */ | |
636 | mci_writel(host, CLKENA, 0); | |
637 | mci_writel(host, CLKSRC, 0); | |
638 | ||
639 | /* inform CIU */ | |
640 | mci_send_cmd(slot, | |
641 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
642 | ||
643 | /* set clock to desired speed */ | |
644 | mci_writel(host, CLKDIV, div); | |
645 | ||
646 | /* inform CIU */ | |
647 | mci_send_cmd(slot, | |
648 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
649 | ||
650 | /* enable clock */ | |
e3891dc5 JC |
651 | mci_writel(host, CLKENA, ((SDMMC_CLKEN_ENABLE | |
652 | SDMMC_CLKEN_LOW_PWR) << slot->id)); | |
f95f3850 WN |
653 | |
654 | /* inform CIU */ | |
655 | mci_send_cmd(slot, | |
656 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
657 | ||
658 | host->current_speed = slot->clock; | |
659 | } | |
660 | ||
661 | /* Set the current slot bus width */ | |
1d56c453 | 662 | mci_writel(host, CTYPE, (slot->ctype << slot->id)); |
f95f3850 WN |
663 | } |
664 | ||
053b3ce6 SJ |
665 | static void __dw_mci_start_request(struct dw_mci *host, |
666 | struct dw_mci_slot *slot, | |
667 | struct mmc_command *cmd) | |
f95f3850 WN |
668 | { |
669 | struct mmc_request *mrq; | |
f95f3850 WN |
670 | struct mmc_data *data; |
671 | u32 cmdflags; | |
672 | ||
673 | mrq = slot->mrq; | |
674 | if (host->pdata->select_slot) | |
675 | host->pdata->select_slot(slot->id); | |
676 | ||
677 | /* Slot specific timing and width adjustment */ | |
678 | dw_mci_setup_bus(slot); | |
679 | ||
680 | host->cur_slot = slot; | |
681 | host->mrq = mrq; | |
682 | ||
683 | host->pending_events = 0; | |
684 | host->completed_events = 0; | |
685 | host->data_status = 0; | |
686 | ||
053b3ce6 | 687 | data = cmd->data; |
f95f3850 WN |
688 | if (data) { |
689 | dw_mci_set_timeout(host); | |
690 | mci_writel(host, BYTCNT, data->blksz*data->blocks); | |
691 | mci_writel(host, BLKSIZ, data->blksz); | |
692 | } | |
693 | ||
f95f3850 WN |
694 | cmdflags = dw_mci_prepare_command(slot->mmc, cmd); |
695 | ||
696 | /* this is the first command, send the initialization clock */ | |
697 | if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) | |
698 | cmdflags |= SDMMC_CMD_INIT; | |
699 | ||
700 | if (data) { | |
701 | dw_mci_submit_data(host, data); | |
702 | wmb(); | |
703 | } | |
704 | ||
705 | dw_mci_start_command(host, cmd, cmdflags); | |
706 | ||
707 | if (mrq->stop) | |
708 | host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); | |
709 | } | |
710 | ||
053b3ce6 SJ |
711 | static void dw_mci_start_request(struct dw_mci *host, |
712 | struct dw_mci_slot *slot) | |
713 | { | |
714 | struct mmc_request *mrq = slot->mrq; | |
715 | struct mmc_command *cmd; | |
716 | ||
717 | cmd = mrq->sbc ? mrq->sbc : mrq->cmd; | |
718 | __dw_mci_start_request(host, slot, cmd); | |
719 | } | |
720 | ||
7456caae | 721 | /* must be called with host->lock held */ |
f95f3850 WN |
722 | static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, |
723 | struct mmc_request *mrq) | |
724 | { | |
725 | dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", | |
726 | host->state); | |
727 | ||
f95f3850 WN |
728 | slot->mrq = mrq; |
729 | ||
730 | if (host->state == STATE_IDLE) { | |
731 | host->state = STATE_SENDING_CMD; | |
732 | dw_mci_start_request(host, slot); | |
733 | } else { | |
734 | list_add_tail(&slot->queue_node, &host->queue); | |
735 | } | |
f95f3850 WN |
736 | } |
737 | ||
738 | static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
739 | { | |
740 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
741 | struct dw_mci *host = slot->host; | |
742 | ||
743 | WARN_ON(slot->mrq); | |
744 | ||
7456caae JH |
745 | /* |
746 | * The check for card presence and queueing of the request must be | |
747 | * atomic, otherwise the card could be removed in between and the | |
748 | * request wouldn't fail until another card was inserted. | |
749 | */ | |
750 | spin_lock_bh(&host->lock); | |
751 | ||
f95f3850 | 752 | if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { |
7456caae | 753 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
754 | mrq->cmd->error = -ENOMEDIUM; |
755 | mmc_request_done(mmc, mrq); | |
756 | return; | |
757 | } | |
758 | ||
f95f3850 | 759 | dw_mci_queue_request(host, slot, mrq); |
7456caae JH |
760 | |
761 | spin_unlock_bh(&host->lock); | |
f95f3850 WN |
762 | } |
763 | ||
764 | static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
765 | { | |
766 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
41babf75 | 767 | u32 regs; |
f95f3850 WN |
768 | |
769 | /* set default 1 bit mode */ | |
770 | slot->ctype = SDMMC_CTYPE_1BIT; | |
771 | ||
772 | switch (ios->bus_width) { | |
773 | case MMC_BUS_WIDTH_1: | |
774 | slot->ctype = SDMMC_CTYPE_1BIT; | |
775 | break; | |
776 | case MMC_BUS_WIDTH_4: | |
777 | slot->ctype = SDMMC_CTYPE_4BIT; | |
778 | break; | |
c9b2a06f JC |
779 | case MMC_BUS_WIDTH_8: |
780 | slot->ctype = SDMMC_CTYPE_8BIT; | |
781 | break; | |
f95f3850 WN |
782 | } |
783 | ||
3f514291 SJ |
784 | regs = mci_readl(slot->host, UHS_REG); |
785 | ||
41babf75 | 786 | /* DDR mode set */ |
3f514291 | 787 | if (ios->timing == MMC_TIMING_UHS_DDR50) |
41babf75 | 788 | regs |= (0x1 << slot->id) << 16; |
3f514291 SJ |
789 | else |
790 | regs &= ~(0x1 << slot->id) << 16; | |
791 | ||
792 | mci_writel(slot->host, UHS_REG, regs); | |
41babf75 | 793 | |
f95f3850 WN |
794 | if (ios->clock) { |
795 | /* | |
796 | * Use mirror of ios->clock to prevent race with mmc | |
797 | * core ios update when finding the minimum. | |
798 | */ | |
799 | slot->clock = ios->clock; | |
800 | } | |
801 | ||
802 | switch (ios->power_mode) { | |
803 | case MMC_POWER_UP: | |
804 | set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); | |
805 | break; | |
806 | default: | |
807 | break; | |
808 | } | |
809 | } | |
810 | ||
811 | static int dw_mci_get_ro(struct mmc_host *mmc) | |
812 | { | |
813 | int read_only; | |
814 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
815 | struct dw_mci_board *brd = slot->host->pdata; | |
816 | ||
817 | /* Use platform get_ro function, else try on board write protect */ | |
818 | if (brd->get_ro) | |
819 | read_only = brd->get_ro(slot->id); | |
820 | else | |
821 | read_only = | |
822 | mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; | |
823 | ||
824 | dev_dbg(&mmc->class_dev, "card is %s\n", | |
825 | read_only ? "read-only" : "read-write"); | |
826 | ||
827 | return read_only; | |
828 | } | |
829 | ||
830 | static int dw_mci_get_cd(struct mmc_host *mmc) | |
831 | { | |
832 | int present; | |
833 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
834 | struct dw_mci_board *brd = slot->host->pdata; | |
835 | ||
836 | /* Use platform get_cd function, else try onboard card detect */ | |
fc3d7720 JC |
837 | if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION) |
838 | present = 1; | |
839 | else if (brd->get_cd) | |
f95f3850 WN |
840 | present = !brd->get_cd(slot->id); |
841 | else | |
842 | present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) | |
843 | == 0 ? 1 : 0; | |
844 | ||
845 | if (present) | |
846 | dev_dbg(&mmc->class_dev, "card is present\n"); | |
847 | else | |
848 | dev_dbg(&mmc->class_dev, "card is not present\n"); | |
849 | ||
850 | return present; | |
851 | } | |
852 | ||
1a5c8e1f SH |
853 | static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) |
854 | { | |
855 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
856 | struct dw_mci *host = slot->host; | |
857 | u32 int_mask; | |
858 | ||
859 | /* Enable/disable Slot Specific SDIO interrupt */ | |
860 | int_mask = mci_readl(host, INTMASK); | |
861 | if (enb) { | |
862 | mci_writel(host, INTMASK, | |
705ad047 | 863 | (int_mask | SDMMC_INT_SDIO(slot->id))); |
1a5c8e1f SH |
864 | } else { |
865 | mci_writel(host, INTMASK, | |
705ad047 | 866 | (int_mask & ~SDMMC_INT_SDIO(slot->id))); |
1a5c8e1f SH |
867 | } |
868 | } | |
869 | ||
f95f3850 | 870 | static const struct mmc_host_ops dw_mci_ops = { |
1a5c8e1f | 871 | .request = dw_mci_request, |
9aa51408 SJ |
872 | .pre_req = dw_mci_pre_req, |
873 | .post_req = dw_mci_post_req, | |
1a5c8e1f SH |
874 | .set_ios = dw_mci_set_ios, |
875 | .get_ro = dw_mci_get_ro, | |
876 | .get_cd = dw_mci_get_cd, | |
877 | .enable_sdio_irq = dw_mci_enable_sdio_irq, | |
f95f3850 WN |
878 | }; |
879 | ||
880 | static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) | |
881 | __releases(&host->lock) | |
882 | __acquires(&host->lock) | |
883 | { | |
884 | struct dw_mci_slot *slot; | |
885 | struct mmc_host *prev_mmc = host->cur_slot->mmc; | |
886 | ||
887 | WARN_ON(host->cmd || host->data); | |
888 | ||
889 | host->cur_slot->mrq = NULL; | |
890 | host->mrq = NULL; | |
891 | if (!list_empty(&host->queue)) { | |
892 | slot = list_entry(host->queue.next, | |
893 | struct dw_mci_slot, queue_node); | |
894 | list_del(&slot->queue_node); | |
62ca8034 | 895 | dev_vdbg(&host->dev, "list not empty: %s is next\n", |
f95f3850 WN |
896 | mmc_hostname(slot->mmc)); |
897 | host->state = STATE_SENDING_CMD; | |
898 | dw_mci_start_request(host, slot); | |
899 | } else { | |
62ca8034 | 900 | dev_vdbg(&host->dev, "list empty\n"); |
f95f3850 WN |
901 | host->state = STATE_IDLE; |
902 | } | |
903 | ||
904 | spin_unlock(&host->lock); | |
905 | mmc_request_done(prev_mmc, mrq); | |
906 | spin_lock(&host->lock); | |
907 | } | |
908 | ||
909 | static void dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) | |
910 | { | |
911 | u32 status = host->cmd_status; | |
912 | ||
913 | host->cmd_status = 0; | |
914 | ||
915 | /* Read the response from the card (up to 16 bytes) */ | |
916 | if (cmd->flags & MMC_RSP_PRESENT) { | |
917 | if (cmd->flags & MMC_RSP_136) { | |
918 | cmd->resp[3] = mci_readl(host, RESP0); | |
919 | cmd->resp[2] = mci_readl(host, RESP1); | |
920 | cmd->resp[1] = mci_readl(host, RESP2); | |
921 | cmd->resp[0] = mci_readl(host, RESP3); | |
922 | } else { | |
923 | cmd->resp[0] = mci_readl(host, RESP0); | |
924 | cmd->resp[1] = 0; | |
925 | cmd->resp[2] = 0; | |
926 | cmd->resp[3] = 0; | |
927 | } | |
928 | } | |
929 | ||
930 | if (status & SDMMC_INT_RTO) | |
931 | cmd->error = -ETIMEDOUT; | |
932 | else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) | |
933 | cmd->error = -EILSEQ; | |
934 | else if (status & SDMMC_INT_RESP_ERR) | |
935 | cmd->error = -EIO; | |
936 | else | |
937 | cmd->error = 0; | |
938 | ||
939 | if (cmd->error) { | |
940 | /* newer ip versions need a delay between retries */ | |
941 | if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY) | |
942 | mdelay(20); | |
943 | ||
944 | if (cmd->data) { | |
f95f3850 | 945 | dw_mci_stop_dma(host); |
fda5f736 | 946 | host->data = NULL; |
f95f3850 WN |
947 | } |
948 | } | |
949 | } | |
950 | ||
951 | static void dw_mci_tasklet_func(unsigned long priv) | |
952 | { | |
953 | struct dw_mci *host = (struct dw_mci *)priv; | |
954 | struct mmc_data *data; | |
955 | struct mmc_command *cmd; | |
956 | enum dw_mci_state state; | |
957 | enum dw_mci_state prev_state; | |
94dd5b33 | 958 | u32 status, ctrl; |
f95f3850 WN |
959 | |
960 | spin_lock(&host->lock); | |
961 | ||
962 | state = host->state; | |
963 | data = host->data; | |
964 | ||
965 | do { | |
966 | prev_state = state; | |
967 | ||
968 | switch (state) { | |
969 | case STATE_IDLE: | |
970 | break; | |
971 | ||
972 | case STATE_SENDING_CMD: | |
973 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
974 | &host->pending_events)) | |
975 | break; | |
976 | ||
977 | cmd = host->cmd; | |
978 | host->cmd = NULL; | |
979 | set_bit(EVENT_CMD_COMPLETE, &host->completed_events); | |
053b3ce6 SJ |
980 | dw_mci_command_complete(host, cmd); |
981 | if (cmd == host->mrq->sbc && !cmd->error) { | |
982 | prev_state = state = STATE_SENDING_CMD; | |
983 | __dw_mci_start_request(host, host->cur_slot, | |
984 | host->mrq->cmd); | |
985 | goto unlock; | |
986 | } | |
987 | ||
f95f3850 WN |
988 | if (!host->mrq->data || cmd->error) { |
989 | dw_mci_request_end(host, host->mrq); | |
990 | goto unlock; | |
991 | } | |
992 | ||
993 | prev_state = state = STATE_SENDING_DATA; | |
994 | /* fall through */ | |
995 | ||
996 | case STATE_SENDING_DATA: | |
997 | if (test_and_clear_bit(EVENT_DATA_ERROR, | |
998 | &host->pending_events)) { | |
999 | dw_mci_stop_dma(host); | |
1000 | if (data->stop) | |
1001 | send_stop_cmd(host, data); | |
1002 | state = STATE_DATA_ERROR; | |
1003 | break; | |
1004 | } | |
1005 | ||
1006 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1007 | &host->pending_events)) | |
1008 | break; | |
1009 | ||
1010 | set_bit(EVENT_XFER_COMPLETE, &host->completed_events); | |
1011 | prev_state = state = STATE_DATA_BUSY; | |
1012 | /* fall through */ | |
1013 | ||
1014 | case STATE_DATA_BUSY: | |
1015 | if (!test_and_clear_bit(EVENT_DATA_COMPLETE, | |
1016 | &host->pending_events)) | |
1017 | break; | |
1018 | ||
1019 | host->data = NULL; | |
1020 | set_bit(EVENT_DATA_COMPLETE, &host->completed_events); | |
1021 | status = host->data_status; | |
1022 | ||
1023 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1024 | if (status & SDMMC_INT_DTO) { | |
f95f3850 WN |
1025 | data->error = -ETIMEDOUT; |
1026 | } else if (status & SDMMC_INT_DCRC) { | |
f95f3850 | 1027 | data->error = -EILSEQ; |
55c5efbc JH |
1028 | } else if (status & SDMMC_INT_EBE && |
1029 | host->dir_status == | |
1030 | DW_MCI_SEND_STATUS) { | |
1031 | /* | |
1032 | * No data CRC status was returned. | |
1033 | * The number of bytes transferred will | |
1034 | * be exaggerated in PIO mode. | |
1035 | */ | |
1036 | data->bytes_xfered = 0; | |
1037 | data->error = -ETIMEDOUT; | |
f95f3850 | 1038 | } else { |
62ca8034 | 1039 | dev_err(&host->dev, |
f95f3850 WN |
1040 | "data FIFO error " |
1041 | "(status=%08x)\n", | |
1042 | status); | |
1043 | data->error = -EIO; | |
1044 | } | |
94dd5b33 JH |
1045 | /* |
1046 | * After an error, there may be data lingering | |
1047 | * in the FIFO, so reset it - doing so | |
1048 | * generates a block interrupt, hence setting | |
1049 | * the scatter-gather pointer to NULL. | |
1050 | */ | |
f9c2a0dc | 1051 | sg_miter_stop(&host->sg_miter); |
94dd5b33 JH |
1052 | host->sg = NULL; |
1053 | ctrl = mci_readl(host, CTRL); | |
1054 | ctrl |= SDMMC_CTRL_FIFO_RESET; | |
1055 | mci_writel(host, CTRL, ctrl); | |
f95f3850 WN |
1056 | } else { |
1057 | data->bytes_xfered = data->blocks * data->blksz; | |
1058 | data->error = 0; | |
1059 | } | |
1060 | ||
1061 | if (!data->stop) { | |
1062 | dw_mci_request_end(host, host->mrq); | |
1063 | goto unlock; | |
1064 | } | |
1065 | ||
053b3ce6 SJ |
1066 | if (host->mrq->sbc && !data->error) { |
1067 | data->stop->error = 0; | |
1068 | dw_mci_request_end(host, host->mrq); | |
1069 | goto unlock; | |
1070 | } | |
1071 | ||
f95f3850 WN |
1072 | prev_state = state = STATE_SENDING_STOP; |
1073 | if (!data->error) | |
1074 | send_stop_cmd(host, data); | |
1075 | /* fall through */ | |
1076 | ||
1077 | case STATE_SENDING_STOP: | |
1078 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1079 | &host->pending_events)) | |
1080 | break; | |
1081 | ||
1082 | host->cmd = NULL; | |
1083 | dw_mci_command_complete(host, host->mrq->stop); | |
1084 | dw_mci_request_end(host, host->mrq); | |
1085 | goto unlock; | |
1086 | ||
1087 | case STATE_DATA_ERROR: | |
1088 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1089 | &host->pending_events)) | |
1090 | break; | |
1091 | ||
1092 | state = STATE_DATA_BUSY; | |
1093 | break; | |
1094 | } | |
1095 | } while (state != prev_state); | |
1096 | ||
1097 | host->state = state; | |
1098 | unlock: | |
1099 | spin_unlock(&host->lock); | |
1100 | ||
1101 | } | |
1102 | ||
34b664a2 JH |
1103 | /* push final bytes to part_buf, only use during push */ |
1104 | static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1105 | { |
34b664a2 JH |
1106 | memcpy((void *)&host->part_buf, buf, cnt); |
1107 | host->part_buf_count = cnt; | |
1108 | } | |
f95f3850 | 1109 | |
34b664a2 JH |
1110 | /* append bytes to part_buf, only use during push */ |
1111 | static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1112 | { | |
1113 | cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); | |
1114 | memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); | |
1115 | host->part_buf_count += cnt; | |
1116 | return cnt; | |
1117 | } | |
f95f3850 | 1118 | |
34b664a2 JH |
1119 | /* pull first bytes from part_buf, only use during pull */ |
1120 | static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1121 | { | |
1122 | cnt = min(cnt, (int)host->part_buf_count); | |
1123 | if (cnt) { | |
1124 | memcpy(buf, (void *)&host->part_buf + host->part_buf_start, | |
1125 | cnt); | |
1126 | host->part_buf_count -= cnt; | |
1127 | host->part_buf_start += cnt; | |
f95f3850 | 1128 | } |
34b664a2 | 1129 | return cnt; |
f95f3850 WN |
1130 | } |
1131 | ||
34b664a2 JH |
1132 | /* pull final bytes from the part_buf, assuming it's just been filled */ |
1133 | static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1134 | { |
34b664a2 JH |
1135 | memcpy(buf, &host->part_buf, cnt); |
1136 | host->part_buf_start = cnt; | |
1137 | host->part_buf_count = (1 << host->data_shift) - cnt; | |
1138 | } | |
f95f3850 | 1139 | |
34b664a2 JH |
1140 | static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) |
1141 | { | |
1142 | /* try and push anything in the part_buf */ | |
1143 | if (unlikely(host->part_buf_count)) { | |
1144 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1145 | buf += len; | |
1146 | cnt -= len; | |
1147 | if (!sg_next(host->sg) || host->part_buf_count == 2) { | |
4e0a5adf JC |
1148 | mci_writew(host, DATA(host->data_offset), |
1149 | host->part_buf16); | |
34b664a2 JH |
1150 | host->part_buf_count = 0; |
1151 | } | |
1152 | } | |
1153 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1154 | if (unlikely((unsigned long)buf & 0x1)) { | |
1155 | while (cnt >= 2) { | |
1156 | u16 aligned_buf[64]; | |
1157 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1158 | int items = len >> 1; | |
1159 | int i; | |
1160 | /* memcpy from input buffer into aligned buffer */ | |
1161 | memcpy(aligned_buf, buf, len); | |
1162 | buf += len; | |
1163 | cnt -= len; | |
1164 | /* push data from aligned buffer into fifo */ | |
1165 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1166 | mci_writew(host, DATA(host->data_offset), |
1167 | aligned_buf[i]); | |
34b664a2 JH |
1168 | } |
1169 | } else | |
1170 | #endif | |
1171 | { | |
1172 | u16 *pdata = buf; | |
1173 | for (; cnt >= 2; cnt -= 2) | |
4e0a5adf | 1174 | mci_writew(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1175 | buf = pdata; |
1176 | } | |
1177 | /* put anything remaining in the part_buf */ | |
1178 | if (cnt) { | |
1179 | dw_mci_set_part_bytes(host, buf, cnt); | |
1180 | if (!sg_next(host->sg)) | |
4e0a5adf JC |
1181 | mci_writew(host, DATA(host->data_offset), |
1182 | host->part_buf16); | |
34b664a2 JH |
1183 | } |
1184 | } | |
f95f3850 | 1185 | |
34b664a2 JH |
1186 | static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) |
1187 | { | |
1188 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1189 | if (unlikely((unsigned long)buf & 0x1)) { | |
1190 | while (cnt >= 2) { | |
1191 | /* pull data from fifo into aligned buffer */ | |
1192 | u16 aligned_buf[64]; | |
1193 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1194 | int items = len >> 1; | |
1195 | int i; | |
1196 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1197 | aligned_buf[i] = mci_readw(host, |
1198 | DATA(host->data_offset)); | |
34b664a2 JH |
1199 | /* memcpy from aligned buffer into output buffer */ |
1200 | memcpy(buf, aligned_buf, len); | |
1201 | buf += len; | |
1202 | cnt -= len; | |
1203 | } | |
1204 | } else | |
1205 | #endif | |
1206 | { | |
1207 | u16 *pdata = buf; | |
1208 | for (; cnt >= 2; cnt -= 2) | |
4e0a5adf | 1209 | *pdata++ = mci_readw(host, DATA(host->data_offset)); |
34b664a2 JH |
1210 | buf = pdata; |
1211 | } | |
1212 | if (cnt) { | |
4e0a5adf | 1213 | host->part_buf16 = mci_readw(host, DATA(host->data_offset)); |
34b664a2 | 1214 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
1215 | } |
1216 | } | |
1217 | ||
1218 | static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) | |
1219 | { | |
34b664a2 JH |
1220 | /* try and push anything in the part_buf */ |
1221 | if (unlikely(host->part_buf_count)) { | |
1222 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1223 | buf += len; | |
1224 | cnt -= len; | |
1225 | if (!sg_next(host->sg) || host->part_buf_count == 4) { | |
4e0a5adf JC |
1226 | mci_writel(host, DATA(host->data_offset), |
1227 | host->part_buf32); | |
34b664a2 JH |
1228 | host->part_buf_count = 0; |
1229 | } | |
1230 | } | |
1231 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1232 | if (unlikely((unsigned long)buf & 0x3)) { | |
1233 | while (cnt >= 4) { | |
1234 | u32 aligned_buf[32]; | |
1235 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
1236 | int items = len >> 2; | |
1237 | int i; | |
1238 | /* memcpy from input buffer into aligned buffer */ | |
1239 | memcpy(aligned_buf, buf, len); | |
1240 | buf += len; | |
1241 | cnt -= len; | |
1242 | /* push data from aligned buffer into fifo */ | |
1243 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1244 | mci_writel(host, DATA(host->data_offset), |
1245 | aligned_buf[i]); | |
34b664a2 JH |
1246 | } |
1247 | } else | |
1248 | #endif | |
1249 | { | |
1250 | u32 *pdata = buf; | |
1251 | for (; cnt >= 4; cnt -= 4) | |
4e0a5adf | 1252 | mci_writel(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1253 | buf = pdata; |
1254 | } | |
1255 | /* put anything remaining in the part_buf */ | |
1256 | if (cnt) { | |
1257 | dw_mci_set_part_bytes(host, buf, cnt); | |
1258 | if (!sg_next(host->sg)) | |
4e0a5adf JC |
1259 | mci_writel(host, DATA(host->data_offset), |
1260 | host->part_buf32); | |
f95f3850 WN |
1261 | } |
1262 | } | |
1263 | ||
1264 | static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) | |
1265 | { | |
34b664a2 JH |
1266 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
1267 | if (unlikely((unsigned long)buf & 0x3)) { | |
1268 | while (cnt >= 4) { | |
1269 | /* pull data from fifo into aligned buffer */ | |
1270 | u32 aligned_buf[32]; | |
1271 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
1272 | int items = len >> 2; | |
1273 | int i; | |
1274 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1275 | aligned_buf[i] = mci_readl(host, |
1276 | DATA(host->data_offset)); | |
34b664a2 JH |
1277 | /* memcpy from aligned buffer into output buffer */ |
1278 | memcpy(buf, aligned_buf, len); | |
1279 | buf += len; | |
1280 | cnt -= len; | |
1281 | } | |
1282 | } else | |
1283 | #endif | |
1284 | { | |
1285 | u32 *pdata = buf; | |
1286 | for (; cnt >= 4; cnt -= 4) | |
4e0a5adf | 1287 | *pdata++ = mci_readl(host, DATA(host->data_offset)); |
34b664a2 JH |
1288 | buf = pdata; |
1289 | } | |
1290 | if (cnt) { | |
4e0a5adf | 1291 | host->part_buf32 = mci_readl(host, DATA(host->data_offset)); |
34b664a2 | 1292 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
1293 | } |
1294 | } | |
1295 | ||
1296 | static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) | |
1297 | { | |
34b664a2 JH |
1298 | /* try and push anything in the part_buf */ |
1299 | if (unlikely(host->part_buf_count)) { | |
1300 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1301 | buf += len; | |
1302 | cnt -= len; | |
1303 | if (!sg_next(host->sg) || host->part_buf_count == 8) { | |
4e0a5adf JC |
1304 | mci_writew(host, DATA(host->data_offset), |
1305 | host->part_buf); | |
34b664a2 JH |
1306 | host->part_buf_count = 0; |
1307 | } | |
1308 | } | |
1309 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1310 | if (unlikely((unsigned long)buf & 0x7)) { | |
1311 | while (cnt >= 8) { | |
1312 | u64 aligned_buf[16]; | |
1313 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
1314 | int items = len >> 3; | |
1315 | int i; | |
1316 | /* memcpy from input buffer into aligned buffer */ | |
1317 | memcpy(aligned_buf, buf, len); | |
1318 | buf += len; | |
1319 | cnt -= len; | |
1320 | /* push data from aligned buffer into fifo */ | |
1321 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1322 | mci_writeq(host, DATA(host->data_offset), |
1323 | aligned_buf[i]); | |
34b664a2 JH |
1324 | } |
1325 | } else | |
1326 | #endif | |
1327 | { | |
1328 | u64 *pdata = buf; | |
1329 | for (; cnt >= 8; cnt -= 8) | |
4e0a5adf | 1330 | mci_writeq(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1331 | buf = pdata; |
1332 | } | |
1333 | /* put anything remaining in the part_buf */ | |
1334 | if (cnt) { | |
1335 | dw_mci_set_part_bytes(host, buf, cnt); | |
1336 | if (!sg_next(host->sg)) | |
4e0a5adf JC |
1337 | mci_writeq(host, DATA(host->data_offset), |
1338 | host->part_buf); | |
f95f3850 WN |
1339 | } |
1340 | } | |
1341 | ||
1342 | static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) | |
1343 | { | |
34b664a2 JH |
1344 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
1345 | if (unlikely((unsigned long)buf & 0x7)) { | |
1346 | while (cnt >= 8) { | |
1347 | /* pull data from fifo into aligned buffer */ | |
1348 | u64 aligned_buf[16]; | |
1349 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
1350 | int items = len >> 3; | |
1351 | int i; | |
1352 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1353 | aligned_buf[i] = mci_readq(host, |
1354 | DATA(host->data_offset)); | |
34b664a2 JH |
1355 | /* memcpy from aligned buffer into output buffer */ |
1356 | memcpy(buf, aligned_buf, len); | |
1357 | buf += len; | |
1358 | cnt -= len; | |
1359 | } | |
1360 | } else | |
1361 | #endif | |
1362 | { | |
1363 | u64 *pdata = buf; | |
1364 | for (; cnt >= 8; cnt -= 8) | |
4e0a5adf | 1365 | *pdata++ = mci_readq(host, DATA(host->data_offset)); |
34b664a2 JH |
1366 | buf = pdata; |
1367 | } | |
1368 | if (cnt) { | |
4e0a5adf | 1369 | host->part_buf = mci_readq(host, DATA(host->data_offset)); |
34b664a2 JH |
1370 | dw_mci_pull_final_bytes(host, buf, cnt); |
1371 | } | |
1372 | } | |
f95f3850 | 1373 | |
34b664a2 JH |
1374 | static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) |
1375 | { | |
1376 | int len; | |
f95f3850 | 1377 | |
34b664a2 JH |
1378 | /* get remaining partial bytes */ |
1379 | len = dw_mci_pull_part_bytes(host, buf, cnt); | |
1380 | if (unlikely(len == cnt)) | |
1381 | return; | |
1382 | buf += len; | |
1383 | cnt -= len; | |
1384 | ||
1385 | /* get the rest of the data */ | |
1386 | host->pull_data(host, buf, cnt); | |
f95f3850 WN |
1387 | } |
1388 | ||
1389 | static void dw_mci_read_data_pio(struct dw_mci *host) | |
1390 | { | |
f9c2a0dc SJ |
1391 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
1392 | void *buf; | |
1393 | unsigned int offset; | |
f95f3850 WN |
1394 | struct mmc_data *data = host->data; |
1395 | int shift = host->data_shift; | |
1396 | u32 status; | |
ba6a902d | 1397 | unsigned int nbytes = 0, len; |
f9c2a0dc | 1398 | unsigned int remain, fcnt; |
f95f3850 WN |
1399 | |
1400 | do { | |
f9c2a0dc SJ |
1401 | if (!sg_miter_next(sg_miter)) |
1402 | goto done; | |
1403 | ||
1404 | host->sg = sg_miter->__sg; | |
1405 | buf = sg_miter->addr; | |
1406 | remain = sg_miter->length; | |
1407 | offset = 0; | |
1408 | ||
1409 | do { | |
1410 | fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) | |
1411 | << shift) + host->part_buf_count; | |
1412 | len = min(remain, fcnt); | |
1413 | if (!len) | |
1414 | break; | |
34b664a2 | 1415 | dw_mci_pull_data(host, (void *)(buf + offset), len); |
f95f3850 WN |
1416 | offset += len; |
1417 | nbytes += len; | |
f9c2a0dc SJ |
1418 | remain -= len; |
1419 | } while (remain); | |
1420 | sg_miter->consumed = offset; | |
f95f3850 WN |
1421 | |
1422 | status = mci_readl(host, MINTSTS); | |
1423 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
1424 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1425 | host->data_status = status; | |
1426 | data->bytes_xfered += nbytes; | |
f9c2a0dc SJ |
1427 | sg_miter_stop(sg_miter); |
1428 | host->sg = NULL; | |
f95f3850 WN |
1429 | smp_wmb(); |
1430 | ||
1431 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
1432 | ||
1433 | tasklet_schedule(&host->tasklet); | |
1434 | return; | |
1435 | } | |
f95f3850 | 1436 | } while (status & SDMMC_INT_RXDR); /*if the RXDR is ready read again*/ |
f95f3850 | 1437 | data->bytes_xfered += nbytes; |
f9c2a0dc SJ |
1438 | |
1439 | if (!remain) { | |
1440 | if (!sg_miter_next(sg_miter)) | |
1441 | goto done; | |
1442 | sg_miter->consumed = 0; | |
1443 | } | |
1444 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
1445 | return; |
1446 | ||
1447 | done: | |
1448 | data->bytes_xfered += nbytes; | |
f9c2a0dc SJ |
1449 | sg_miter_stop(sg_miter); |
1450 | host->sg = NULL; | |
f95f3850 WN |
1451 | smp_wmb(); |
1452 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
1453 | } | |
1454 | ||
1455 | static void dw_mci_write_data_pio(struct dw_mci *host) | |
1456 | { | |
f9c2a0dc SJ |
1457 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
1458 | void *buf; | |
1459 | unsigned int offset; | |
f95f3850 WN |
1460 | struct mmc_data *data = host->data; |
1461 | int shift = host->data_shift; | |
1462 | u32 status; | |
1463 | unsigned int nbytes = 0, len; | |
f9c2a0dc SJ |
1464 | unsigned int fifo_depth = host->fifo_depth; |
1465 | unsigned int remain, fcnt; | |
f95f3850 WN |
1466 | |
1467 | do { | |
f9c2a0dc SJ |
1468 | if (!sg_miter_next(sg_miter)) |
1469 | goto done; | |
1470 | ||
1471 | host->sg = sg_miter->__sg; | |
1472 | buf = sg_miter->addr; | |
1473 | remain = sg_miter->length; | |
1474 | offset = 0; | |
1475 | ||
1476 | do { | |
1477 | fcnt = ((fifo_depth - | |
1478 | SDMMC_GET_FCNT(mci_readl(host, STATUS))) | |
1479 | << shift) - host->part_buf_count; | |
1480 | len = min(remain, fcnt); | |
1481 | if (!len) | |
1482 | break; | |
f95f3850 | 1483 | host->push_data(host, (void *)(buf + offset), len); |
f95f3850 WN |
1484 | offset += len; |
1485 | nbytes += len; | |
f9c2a0dc SJ |
1486 | remain -= len; |
1487 | } while (remain); | |
1488 | sg_miter->consumed = offset; | |
f95f3850 WN |
1489 | |
1490 | status = mci_readl(host, MINTSTS); | |
1491 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
1492 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1493 | host->data_status = status; | |
1494 | data->bytes_xfered += nbytes; | |
f9c2a0dc SJ |
1495 | sg_miter_stop(sg_miter); |
1496 | host->sg = NULL; | |
f95f3850 WN |
1497 | |
1498 | smp_wmb(); | |
1499 | ||
1500 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
1501 | ||
1502 | tasklet_schedule(&host->tasklet); | |
1503 | return; | |
1504 | } | |
1505 | } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ | |
f95f3850 | 1506 | data->bytes_xfered += nbytes; |
f9c2a0dc SJ |
1507 | |
1508 | if (!remain) { | |
1509 | if (!sg_miter_next(sg_miter)) | |
1510 | goto done; | |
1511 | sg_miter->consumed = 0; | |
1512 | } | |
1513 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
1514 | return; |
1515 | ||
1516 | done: | |
1517 | data->bytes_xfered += nbytes; | |
f9c2a0dc SJ |
1518 | sg_miter_stop(sg_miter); |
1519 | host->sg = NULL; | |
f95f3850 WN |
1520 | smp_wmb(); |
1521 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
1522 | } | |
1523 | ||
1524 | static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) | |
1525 | { | |
1526 | if (!host->cmd_status) | |
1527 | host->cmd_status = status; | |
1528 | ||
1529 | smp_wmb(); | |
1530 | ||
1531 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
1532 | tasklet_schedule(&host->tasklet); | |
1533 | } | |
1534 | ||
1535 | static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) | |
1536 | { | |
1537 | struct dw_mci *host = dev_id; | |
1538 | u32 status, pending; | |
1539 | unsigned int pass_count = 0; | |
1a5c8e1f | 1540 | int i; |
f95f3850 WN |
1541 | |
1542 | do { | |
1543 | status = mci_readl(host, RINTSTS); | |
1544 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ | |
1545 | ||
1546 | /* | |
1547 | * DTO fix - version 2.10a and below, and only if internal DMA | |
1548 | * is configured. | |
1549 | */ | |
1550 | if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) { | |
1551 | if (!pending && | |
1552 | ((mci_readl(host, STATUS) >> 17) & 0x1fff)) | |
1553 | pending |= SDMMC_INT_DATA_OVER; | |
1554 | } | |
1555 | ||
1556 | if (!pending) | |
1557 | break; | |
1558 | ||
1559 | if (pending & DW_MCI_CMD_ERROR_FLAGS) { | |
1560 | mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); | |
1561 | host->cmd_status = status; | |
1562 | smp_wmb(); | |
1563 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
f95f3850 WN |
1564 | } |
1565 | ||
1566 | if (pending & DW_MCI_DATA_ERROR_FLAGS) { | |
1567 | /* if there is an error report DATA_ERROR */ | |
1568 | mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); | |
1569 | host->data_status = status; | |
1570 | smp_wmb(); | |
1571 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
6e83e10d SJ |
1572 | if (!(pending & (SDMMC_INT_DTO | SDMMC_INT_DCRC | |
1573 | SDMMC_INT_SBE | SDMMC_INT_EBE))) | |
1574 | tasklet_schedule(&host->tasklet); | |
f95f3850 WN |
1575 | } |
1576 | ||
1577 | if (pending & SDMMC_INT_DATA_OVER) { | |
1578 | mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); | |
1579 | if (!host->data_status) | |
1580 | host->data_status = status; | |
1581 | smp_wmb(); | |
1582 | if (host->dir_status == DW_MCI_RECV_STATUS) { | |
1583 | if (host->sg != NULL) | |
1584 | dw_mci_read_data_pio(host); | |
1585 | } | |
1586 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
1587 | tasklet_schedule(&host->tasklet); | |
1588 | } | |
1589 | ||
1590 | if (pending & SDMMC_INT_RXDR) { | |
1591 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
b40af3aa | 1592 | if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) |
f95f3850 WN |
1593 | dw_mci_read_data_pio(host); |
1594 | } | |
1595 | ||
1596 | if (pending & SDMMC_INT_TXDR) { | |
1597 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
b40af3aa | 1598 | if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) |
f95f3850 WN |
1599 | dw_mci_write_data_pio(host); |
1600 | } | |
1601 | ||
1602 | if (pending & SDMMC_INT_CMD_DONE) { | |
1603 | mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); | |
1604 | dw_mci_cmd_interrupt(host, status); | |
1605 | } | |
1606 | ||
1607 | if (pending & SDMMC_INT_CD) { | |
1608 | mci_writel(host, RINTSTS, SDMMC_INT_CD); | |
95dcc2cb | 1609 | queue_work(host->card_workqueue, &host->card_work); |
f95f3850 WN |
1610 | } |
1611 | ||
1a5c8e1f SH |
1612 | /* Handle SDIO Interrupts */ |
1613 | for (i = 0; i < host->num_slots; i++) { | |
1614 | struct dw_mci_slot *slot = host->slot[i]; | |
1615 | if (pending & SDMMC_INT_SDIO(i)) { | |
1616 | mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i)); | |
1617 | mmc_signal_sdio_irq(slot->mmc); | |
1618 | } | |
1619 | } | |
1620 | ||
f95f3850 WN |
1621 | } while (pass_count++ < 5); |
1622 | ||
1623 | #ifdef CONFIG_MMC_DW_IDMAC | |
1624 | /* Handle DMA interrupts */ | |
1625 | pending = mci_readl(host, IDSTS); | |
1626 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
1627 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI); | |
1628 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); | |
f95f3850 WN |
1629 | host->dma_ops->complete(host); |
1630 | } | |
1631 | #endif | |
1632 | ||
1633 | return IRQ_HANDLED; | |
1634 | } | |
1635 | ||
1791b13e | 1636 | static void dw_mci_work_routine_card(struct work_struct *work) |
f95f3850 | 1637 | { |
1791b13e | 1638 | struct dw_mci *host = container_of(work, struct dw_mci, card_work); |
f95f3850 WN |
1639 | int i; |
1640 | ||
1641 | for (i = 0; i < host->num_slots; i++) { | |
1642 | struct dw_mci_slot *slot = host->slot[i]; | |
1643 | struct mmc_host *mmc = slot->mmc; | |
1644 | struct mmc_request *mrq; | |
1645 | int present; | |
1646 | u32 ctrl; | |
1647 | ||
1648 | present = dw_mci_get_cd(mmc); | |
1649 | while (present != slot->last_detect_state) { | |
f95f3850 WN |
1650 | dev_dbg(&slot->mmc->class_dev, "card %s\n", |
1651 | present ? "inserted" : "removed"); | |
1652 | ||
1791b13e JH |
1653 | /* Power up slot (before spin_lock, may sleep) */ |
1654 | if (present != 0 && host->pdata->setpower) | |
1655 | host->pdata->setpower(slot->id, mmc->ocr_avail); | |
1656 | ||
1657 | spin_lock_bh(&host->lock); | |
1658 | ||
f95f3850 WN |
1659 | /* Card change detected */ |
1660 | slot->last_detect_state = present; | |
1661 | ||
1791b13e JH |
1662 | /* Mark card as present if applicable */ |
1663 | if (present != 0) | |
f95f3850 | 1664 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); |
f95f3850 WN |
1665 | |
1666 | /* Clean up queue if present */ | |
1667 | mrq = slot->mrq; | |
1668 | if (mrq) { | |
1669 | if (mrq == host->mrq) { | |
1670 | host->data = NULL; | |
1671 | host->cmd = NULL; | |
1672 | ||
1673 | switch (host->state) { | |
1674 | case STATE_IDLE: | |
1675 | break; | |
1676 | case STATE_SENDING_CMD: | |
1677 | mrq->cmd->error = -ENOMEDIUM; | |
1678 | if (!mrq->data) | |
1679 | break; | |
1680 | /* fall through */ | |
1681 | case STATE_SENDING_DATA: | |
1682 | mrq->data->error = -ENOMEDIUM; | |
1683 | dw_mci_stop_dma(host); | |
1684 | break; | |
1685 | case STATE_DATA_BUSY: | |
1686 | case STATE_DATA_ERROR: | |
1687 | if (mrq->data->error == -EINPROGRESS) | |
1688 | mrq->data->error = -ENOMEDIUM; | |
1689 | if (!mrq->stop) | |
1690 | break; | |
1691 | /* fall through */ | |
1692 | case STATE_SENDING_STOP: | |
1693 | mrq->stop->error = -ENOMEDIUM; | |
1694 | break; | |
1695 | } | |
1696 | ||
1697 | dw_mci_request_end(host, mrq); | |
1698 | } else { | |
1699 | list_del(&slot->queue_node); | |
1700 | mrq->cmd->error = -ENOMEDIUM; | |
1701 | if (mrq->data) | |
1702 | mrq->data->error = -ENOMEDIUM; | |
1703 | if (mrq->stop) | |
1704 | mrq->stop->error = -ENOMEDIUM; | |
1705 | ||
1706 | spin_unlock(&host->lock); | |
1707 | mmc_request_done(slot->mmc, mrq); | |
1708 | spin_lock(&host->lock); | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | /* Power down slot */ | |
1713 | if (present == 0) { | |
f95f3850 WN |
1714 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); |
1715 | ||
1716 | /* | |
1717 | * Clear down the FIFO - doing so generates a | |
1718 | * block interrupt, hence setting the | |
1719 | * scatter-gather pointer to NULL. | |
1720 | */ | |
f9c2a0dc | 1721 | sg_miter_stop(&host->sg_miter); |
f95f3850 WN |
1722 | host->sg = NULL; |
1723 | ||
1724 | ctrl = mci_readl(host, CTRL); | |
1725 | ctrl |= SDMMC_CTRL_FIFO_RESET; | |
1726 | mci_writel(host, CTRL, ctrl); | |
1727 | ||
1728 | #ifdef CONFIG_MMC_DW_IDMAC | |
1729 | ctrl = mci_readl(host, BMOD); | |
141a712a SJ |
1730 | /* Software reset of DMA */ |
1731 | ctrl |= SDMMC_IDMAC_SWRESET; | |
f95f3850 WN |
1732 | mci_writel(host, BMOD, ctrl); |
1733 | #endif | |
1734 | ||
1735 | } | |
1736 | ||
1791b13e JH |
1737 | spin_unlock_bh(&host->lock); |
1738 | ||
1739 | /* Power down slot (after spin_unlock, may sleep) */ | |
1740 | if (present == 0 && host->pdata->setpower) | |
1741 | host->pdata->setpower(slot->id, 0); | |
1742 | ||
f95f3850 WN |
1743 | present = dw_mci_get_cd(mmc); |
1744 | } | |
1745 | ||
1746 | mmc_detect_change(slot->mmc, | |
1747 | msecs_to_jiffies(host->pdata->detect_delay_ms)); | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id) | |
1752 | { | |
1753 | struct mmc_host *mmc; | |
1754 | struct dw_mci_slot *slot; | |
1755 | ||
62ca8034 | 1756 | mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), &host->dev); |
f95f3850 WN |
1757 | if (!mmc) |
1758 | return -ENOMEM; | |
1759 | ||
1760 | slot = mmc_priv(mmc); | |
1761 | slot->id = id; | |
1762 | slot->mmc = mmc; | |
1763 | slot->host = host; | |
1764 | ||
1765 | mmc->ops = &dw_mci_ops; | |
1766 | mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510); | |
1767 | mmc->f_max = host->bus_hz; | |
1768 | ||
1769 | if (host->pdata->get_ocr) | |
1770 | mmc->ocr_avail = host->pdata->get_ocr(id); | |
1771 | else | |
1772 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
1773 | ||
1774 | /* | |
1775 | * Start with slot power disabled, it will be enabled when a card | |
1776 | * is detected. | |
1777 | */ | |
1778 | if (host->pdata->setpower) | |
1779 | host->pdata->setpower(id, 0); | |
1780 | ||
fc3d7720 JC |
1781 | if (host->pdata->caps) |
1782 | mmc->caps = host->pdata->caps; | |
fc3d7720 | 1783 | |
4f408cc6 SJ |
1784 | if (host->pdata->caps2) |
1785 | mmc->caps2 = host->pdata->caps2; | |
4f408cc6 | 1786 | |
f95f3850 WN |
1787 | if (host->pdata->get_bus_wd) |
1788 | if (host->pdata->get_bus_wd(slot->id) >= 4) | |
1789 | mmc->caps |= MMC_CAP_4_BIT_DATA; | |
1790 | ||
1791 | if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED) | |
6daa7778 | 1792 | mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; |
f95f3850 | 1793 | |
356ac2cf JC |
1794 | if (mmc->caps2 & MMC_CAP2_POWEROFF_NOTIFY) |
1795 | mmc->power_notify_type = MMC_HOST_PW_NOTIFY_SHORT; | |
1796 | else | |
1797 | mmc->power_notify_type = MMC_HOST_PW_NOTIFY_NONE; | |
1798 | ||
f95f3850 WN |
1799 | if (host->pdata->blk_settings) { |
1800 | mmc->max_segs = host->pdata->blk_settings->max_segs; | |
1801 | mmc->max_blk_size = host->pdata->blk_settings->max_blk_size; | |
1802 | mmc->max_blk_count = host->pdata->blk_settings->max_blk_count; | |
1803 | mmc->max_req_size = host->pdata->blk_settings->max_req_size; | |
1804 | mmc->max_seg_size = host->pdata->blk_settings->max_seg_size; | |
1805 | } else { | |
1806 | /* Useful defaults if platform data is unset. */ | |
a39e5746 JC |
1807 | #ifdef CONFIG_MMC_DW_IDMAC |
1808 | mmc->max_segs = host->ring_size; | |
1809 | mmc->max_blk_size = 65536; | |
1810 | mmc->max_blk_count = host->ring_size; | |
1811 | mmc->max_seg_size = 0x1000; | |
1812 | mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; | |
1813 | #else | |
f95f3850 WN |
1814 | mmc->max_segs = 64; |
1815 | mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ | |
1816 | mmc->max_blk_count = 512; | |
1817 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
1818 | mmc->max_seg_size = mmc->max_req_size; | |
f95f3850 | 1819 | #endif /* CONFIG_MMC_DW_IDMAC */ |
a39e5746 | 1820 | } |
f95f3850 | 1821 | |
c07946a3 JC |
1822 | host->vmmc = regulator_get(mmc_dev(mmc), "vmmc"); |
1823 | if (IS_ERR(host->vmmc)) { | |
a3c76eb9 | 1824 | pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc)); |
c07946a3 JC |
1825 | host->vmmc = NULL; |
1826 | } else | |
1827 | regulator_enable(host->vmmc); | |
1828 | ||
f95f3850 WN |
1829 | if (dw_mci_get_cd(mmc)) |
1830 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
1831 | else | |
1832 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
1833 | ||
1834 | host->slot[id] = slot; | |
1835 | mmc_add_host(mmc); | |
1836 | ||
1837 | #if defined(CONFIG_DEBUG_FS) | |
1838 | dw_mci_init_debugfs(slot); | |
1839 | #endif | |
1840 | ||
1841 | /* Card initially undetected */ | |
1842 | slot->last_detect_state = 0; | |
1843 | ||
dd6c4b98 WN |
1844 | /* |
1845 | * Card may have been plugged in prior to boot so we | |
1846 | * need to run the detect tasklet | |
1847 | */ | |
95dcc2cb | 1848 | queue_work(host->card_workqueue, &host->card_work); |
dd6c4b98 | 1849 | |
f95f3850 WN |
1850 | return 0; |
1851 | } | |
1852 | ||
1853 | static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) | |
1854 | { | |
1855 | /* Shutdown detect IRQ */ | |
1856 | if (slot->host->pdata->exit) | |
1857 | slot->host->pdata->exit(id); | |
1858 | ||
1859 | /* Debugfs stuff is cleaned up by mmc core */ | |
1860 | mmc_remove_host(slot->mmc); | |
1861 | slot->host->slot[id] = NULL; | |
1862 | mmc_free_host(slot->mmc); | |
1863 | } | |
1864 | ||
1865 | static void dw_mci_init_dma(struct dw_mci *host) | |
1866 | { | |
1867 | /* Alloc memory for sg translation */ | |
62ca8034 | 1868 | host->sg_cpu = dma_alloc_coherent(&host->dev, PAGE_SIZE, |
f95f3850 WN |
1869 | &host->sg_dma, GFP_KERNEL); |
1870 | if (!host->sg_cpu) { | |
62ca8034 | 1871 | dev_err(&host->dev, "%s: could not alloc DMA memory\n", |
f95f3850 WN |
1872 | __func__); |
1873 | goto no_dma; | |
1874 | } | |
1875 | ||
1876 | /* Determine which DMA interface to use */ | |
1877 | #ifdef CONFIG_MMC_DW_IDMAC | |
1878 | host->dma_ops = &dw_mci_idmac_ops; | |
62ca8034 | 1879 | dev_info(&host->dev, "Using internal DMA controller.\n"); |
f95f3850 WN |
1880 | #endif |
1881 | ||
1882 | if (!host->dma_ops) | |
1883 | goto no_dma; | |
1884 | ||
e1631f98 JC |
1885 | if (host->dma_ops->init && host->dma_ops->start && |
1886 | host->dma_ops->stop && host->dma_ops->cleanup) { | |
f95f3850 | 1887 | if (host->dma_ops->init(host)) { |
62ca8034 | 1888 | dev_err(&host->dev, "%s: Unable to initialize " |
f95f3850 WN |
1889 | "DMA Controller.\n", __func__); |
1890 | goto no_dma; | |
1891 | } | |
1892 | } else { | |
62ca8034 | 1893 | dev_err(&host->dev, "DMA initialization not found.\n"); |
f95f3850 WN |
1894 | goto no_dma; |
1895 | } | |
1896 | ||
1897 | host->use_dma = 1; | |
1898 | return; | |
1899 | ||
1900 | no_dma: | |
62ca8034 | 1901 | dev_info(&host->dev, "Using PIO mode.\n"); |
f95f3850 WN |
1902 | host->use_dma = 0; |
1903 | return; | |
1904 | } | |
1905 | ||
1906 | static bool mci_wait_reset(struct device *dev, struct dw_mci *host) | |
1907 | { | |
1908 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
1909 | unsigned int ctrl; | |
1910 | ||
1911 | mci_writel(host, CTRL, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | | |
1912 | SDMMC_CTRL_DMA_RESET)); | |
1913 | ||
1914 | /* wait till resets clear */ | |
1915 | do { | |
1916 | ctrl = mci_readl(host, CTRL); | |
1917 | if (!(ctrl & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | | |
1918 | SDMMC_CTRL_DMA_RESET))) | |
1919 | return true; | |
1920 | } while (time_before(jiffies, timeout)); | |
1921 | ||
1922 | dev_err(dev, "Timeout resetting block (ctrl %#x)\n", ctrl); | |
1923 | ||
1924 | return false; | |
1925 | } | |
1926 | ||
62ca8034 | 1927 | int dw_mci_probe(struct dw_mci *host) |
f95f3850 | 1928 | { |
62ca8034 | 1929 | int width, i, ret = 0; |
f95f3850 WN |
1930 | u32 fifo_size; |
1931 | ||
62ca8034 SH |
1932 | if (!host->pdata || !host->pdata->init) { |
1933 | dev_err(&host->dev, | |
f95f3850 | 1934 | "Platform data must supply init function\n"); |
62ca8034 | 1935 | return -ENODEV; |
f95f3850 WN |
1936 | } |
1937 | ||
62ca8034 SH |
1938 | if (!host->pdata->select_slot && host->pdata->num_slots > 1) { |
1939 | dev_err(&host->dev, | |
f95f3850 | 1940 | "Platform data must supply select_slot function\n"); |
62ca8034 | 1941 | return -ENODEV; |
f95f3850 WN |
1942 | } |
1943 | ||
62ca8034 SH |
1944 | if (!host->pdata->bus_hz) { |
1945 | dev_err(&host->dev, | |
f95f3850 | 1946 | "Platform data must supply bus speed\n"); |
62ca8034 | 1947 | return -ENODEV; |
f95f3850 WN |
1948 | } |
1949 | ||
62ca8034 SH |
1950 | host->bus_hz = host->pdata->bus_hz; |
1951 | host->quirks = host->pdata->quirks; | |
f95f3850 WN |
1952 | |
1953 | spin_lock_init(&host->lock); | |
1954 | INIT_LIST_HEAD(&host->queue); | |
1955 | ||
f95f3850 WN |
1956 | /* |
1957 | * Get the host data width - this assumes that HCON has been set with | |
1958 | * the correct values. | |
1959 | */ | |
1960 | i = (mci_readl(host, HCON) >> 7) & 0x7; | |
1961 | if (!i) { | |
1962 | host->push_data = dw_mci_push_data16; | |
1963 | host->pull_data = dw_mci_pull_data16; | |
1964 | width = 16; | |
1965 | host->data_shift = 1; | |
1966 | } else if (i == 2) { | |
1967 | host->push_data = dw_mci_push_data64; | |
1968 | host->pull_data = dw_mci_pull_data64; | |
1969 | width = 64; | |
1970 | host->data_shift = 3; | |
1971 | } else { | |
1972 | /* Check for a reserved value, and warn if it is */ | |
1973 | WARN((i != 1), | |
1974 | "HCON reports a reserved host data width!\n" | |
1975 | "Defaulting to 32-bit access.\n"); | |
1976 | host->push_data = dw_mci_push_data32; | |
1977 | host->pull_data = dw_mci_pull_data32; | |
1978 | width = 32; | |
1979 | host->data_shift = 2; | |
1980 | } | |
1981 | ||
1982 | /* Reset all blocks */ | |
141a712a SJ |
1983 | if (!mci_wait_reset(&host->dev, host)) |
1984 | return -ENODEV; | |
1985 | ||
1986 | host->dma_ops = host->pdata->dma_ops; | |
1987 | dw_mci_init_dma(host); | |
f95f3850 WN |
1988 | |
1989 | /* Clear the interrupts for the host controller */ | |
1990 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
1991 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
1992 | ||
1993 | /* Put in max timeout */ | |
1994 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
1995 | ||
1996 | /* | |
1997 | * FIFO threshold settings RxMark = fifo_size / 2 - 1, | |
1998 | * Tx Mark = fifo_size / 2 DMA Size = 8 | |
1999 | */ | |
b86d8253 JH |
2000 | if (!host->pdata->fifo_depth) { |
2001 | /* | |
2002 | * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may | |
2003 | * have been overwritten by the bootloader, just like we're | |
2004 | * about to do, so if you know the value for your hardware, you | |
2005 | * should put it in the platform data. | |
2006 | */ | |
2007 | fifo_size = mci_readl(host, FIFOTH); | |
8234e869 | 2008 | fifo_size = 1 + ((fifo_size >> 16) & 0xfff); |
b86d8253 JH |
2009 | } else { |
2010 | fifo_size = host->pdata->fifo_depth; | |
2011 | } | |
2012 | host->fifo_depth = fifo_size; | |
e61cf118 JC |
2013 | host->fifoth_val = ((0x2 << 28) | ((fifo_size/2 - 1) << 16) | |
2014 | ((fifo_size/2) << 0)); | |
2015 | mci_writel(host, FIFOTH, host->fifoth_val); | |
f95f3850 WN |
2016 | |
2017 | /* disable clock to CIU */ | |
2018 | mci_writel(host, CLKENA, 0); | |
2019 | mci_writel(host, CLKSRC, 0); | |
2020 | ||
2021 | tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); | |
95dcc2cb | 2022 | host->card_workqueue = alloc_workqueue("dw-mci-card", |
1791b13e | 2023 | WQ_MEM_RECLAIM | WQ_NON_REENTRANT, 1); |
95dcc2cb | 2024 | if (!host->card_workqueue) |
1791b13e JH |
2025 | goto err_dmaunmap; |
2026 | INIT_WORK(&host->card_work, dw_mci_work_routine_card); | |
62ca8034 | 2027 | ret = request_irq(host->irq, dw_mci_interrupt, host->irq_flags, "dw-mci", host); |
f95f3850 | 2028 | if (ret) |
1791b13e | 2029 | goto err_workqueue; |
f95f3850 | 2030 | |
f95f3850 WN |
2031 | if (host->pdata->num_slots) |
2032 | host->num_slots = host->pdata->num_slots; | |
2033 | else | |
2034 | host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1; | |
2035 | ||
2036 | /* We need at least one slot to succeed */ | |
2037 | for (i = 0; i < host->num_slots; i++) { | |
2038 | ret = dw_mci_init_slot(host, i); | |
2039 | if (ret) { | |
2040 | ret = -ENODEV; | |
2041 | goto err_init_slot; | |
2042 | } | |
2043 | } | |
2044 | ||
4e0a5adf JC |
2045 | /* |
2046 | * In 2.40a spec, Data offset is changed. | |
2047 | * Need to check the version-id and set data-offset for DATA register. | |
2048 | */ | |
2049 | host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); | |
62ca8034 | 2050 | dev_info(&host->dev, "Version ID is %04x\n", host->verid); |
4e0a5adf JC |
2051 | |
2052 | if (host->verid < DW_MMC_240A) | |
2053 | host->data_offset = DATA_OFFSET; | |
2054 | else | |
2055 | host->data_offset = DATA_240A_OFFSET; | |
2056 | ||
f95f3850 WN |
2057 | /* |
2058 | * Enable interrupts for command done, data over, data empty, card det, | |
2059 | * receive ready and error such as transmit, receive timeout, crc error | |
2060 | */ | |
2061 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2062 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
2063 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
2064 | DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); | |
2065 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */ | |
2066 | ||
62ca8034 | 2067 | dev_info(&host->dev, "DW MMC controller at irq %d, " |
b86d8253 JH |
2068 | "%d bit host data width, " |
2069 | "%u deep fifo\n", | |
62ca8034 | 2070 | host->irq, width, fifo_size); |
f95f3850 | 2071 | if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) |
62ca8034 | 2072 | dev_info(&host->dev, "Internal DMAC interrupt fix enabled.\n"); |
f95f3850 WN |
2073 | |
2074 | return 0; | |
2075 | ||
2076 | err_init_slot: | |
2077 | /* De-init any initialized slots */ | |
2078 | while (i > 0) { | |
2079 | if (host->slot[i]) | |
2080 | dw_mci_cleanup_slot(host->slot[i], i); | |
2081 | i--; | |
2082 | } | |
62ca8034 | 2083 | free_irq(host->irq, host); |
f95f3850 | 2084 | |
1791b13e | 2085 | err_workqueue: |
95dcc2cb | 2086 | destroy_workqueue(host->card_workqueue); |
1791b13e | 2087 | |
f95f3850 WN |
2088 | err_dmaunmap: |
2089 | if (host->use_dma && host->dma_ops->exit) | |
2090 | host->dma_ops->exit(host); | |
62ca8034 | 2091 | dma_free_coherent(&host->dev, PAGE_SIZE, |
f95f3850 | 2092 | host->sg_cpu, host->sg_dma); |
f95f3850 | 2093 | |
c07946a3 JC |
2094 | if (host->vmmc) { |
2095 | regulator_disable(host->vmmc); | |
2096 | regulator_put(host->vmmc); | |
2097 | } | |
f95f3850 WN |
2098 | return ret; |
2099 | } | |
62ca8034 | 2100 | EXPORT_SYMBOL(dw_mci_probe); |
f95f3850 | 2101 | |
62ca8034 | 2102 | void dw_mci_remove(struct dw_mci *host) |
f95f3850 | 2103 | { |
f95f3850 WN |
2104 | int i; |
2105 | ||
2106 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2107 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
2108 | ||
f95f3850 | 2109 | for (i = 0; i < host->num_slots; i++) { |
62ca8034 | 2110 | dev_dbg(&host->dev, "remove slot %d\n", i); |
f95f3850 WN |
2111 | if (host->slot[i]) |
2112 | dw_mci_cleanup_slot(host->slot[i], i); | |
2113 | } | |
2114 | ||
2115 | /* disable clock to CIU */ | |
2116 | mci_writel(host, CLKENA, 0); | |
2117 | mci_writel(host, CLKSRC, 0); | |
2118 | ||
62ca8034 | 2119 | free_irq(host->irq, host); |
95dcc2cb | 2120 | destroy_workqueue(host->card_workqueue); |
62ca8034 | 2121 | dma_free_coherent(&host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma); |
f95f3850 WN |
2122 | |
2123 | if (host->use_dma && host->dma_ops->exit) | |
2124 | host->dma_ops->exit(host); | |
2125 | ||
c07946a3 JC |
2126 | if (host->vmmc) { |
2127 | regulator_disable(host->vmmc); | |
2128 | regulator_put(host->vmmc); | |
2129 | } | |
2130 | ||
f95f3850 | 2131 | } |
62ca8034 SH |
2132 | EXPORT_SYMBOL(dw_mci_remove); |
2133 | ||
2134 | ||
f95f3850 | 2135 | |
6fe8890d | 2136 | #ifdef CONFIG_PM_SLEEP |
f95f3850 WN |
2137 | /* |
2138 | * TODO: we should probably disable the clock to the card in the suspend path. | |
2139 | */ | |
62ca8034 | 2140 | int dw_mci_suspend(struct dw_mci *host) |
f95f3850 | 2141 | { |
62ca8034 | 2142 | int i, ret = 0; |
f95f3850 WN |
2143 | |
2144 | for (i = 0; i < host->num_slots; i++) { | |
2145 | struct dw_mci_slot *slot = host->slot[i]; | |
2146 | if (!slot) | |
2147 | continue; | |
2148 | ret = mmc_suspend_host(slot->mmc); | |
2149 | if (ret < 0) { | |
2150 | while (--i >= 0) { | |
2151 | slot = host->slot[i]; | |
2152 | if (slot) | |
2153 | mmc_resume_host(host->slot[i]->mmc); | |
2154 | } | |
2155 | return ret; | |
2156 | } | |
2157 | } | |
2158 | ||
c07946a3 JC |
2159 | if (host->vmmc) |
2160 | regulator_disable(host->vmmc); | |
2161 | ||
f95f3850 WN |
2162 | return 0; |
2163 | } | |
62ca8034 | 2164 | EXPORT_SYMBOL(dw_mci_suspend); |
f95f3850 | 2165 | |
62ca8034 | 2166 | int dw_mci_resume(struct dw_mci *host) |
f95f3850 WN |
2167 | { |
2168 | int i, ret; | |
f95f3850 | 2169 | |
1d6c4e0a JC |
2170 | if (host->vmmc) |
2171 | regulator_enable(host->vmmc); | |
2172 | ||
62ca8034 | 2173 | if (!mci_wait_reset(&host->dev, host)) { |
e61cf118 JC |
2174 | ret = -ENODEV; |
2175 | return ret; | |
2176 | } | |
2177 | ||
141a712a SJ |
2178 | if (host->dma_ops->init) |
2179 | host->dma_ops->init(host); | |
2180 | ||
e61cf118 JC |
2181 | /* Restore the old value at FIFOTH register */ |
2182 | mci_writel(host, FIFOTH, host->fifoth_val); | |
2183 | ||
2184 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2185 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
2186 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
2187 | DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); | |
2188 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); | |
2189 | ||
f95f3850 WN |
2190 | for (i = 0; i < host->num_slots; i++) { |
2191 | struct dw_mci_slot *slot = host->slot[i]; | |
2192 | if (!slot) | |
2193 | continue; | |
2194 | ret = mmc_resume_host(host->slot[i]->mmc); | |
2195 | if (ret < 0) | |
2196 | return ret; | |
2197 | } | |
f95f3850 WN |
2198 | return 0; |
2199 | } | |
62ca8034 | 2200 | EXPORT_SYMBOL(dw_mci_resume); |
6fe8890d JC |
2201 | #endif /* CONFIG_PM_SLEEP */ |
2202 | ||
f95f3850 WN |
2203 | static int __init dw_mci_init(void) |
2204 | { | |
62ca8034 SH |
2205 | printk(KERN_INFO "Synopsys Designware Multimedia Card Interface Driver"); |
2206 | return 0; | |
f95f3850 WN |
2207 | } |
2208 | ||
2209 | static void __exit dw_mci_exit(void) | |
2210 | { | |
f95f3850 WN |
2211 | } |
2212 | ||
2213 | module_init(dw_mci_init); | |
2214 | module_exit(dw_mci_exit); | |
2215 | ||
2216 | MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); | |
2217 | MODULE_AUTHOR("NXP Semiconductor VietNam"); | |
2218 | MODULE_AUTHOR("Imagination Technologies Ltd"); | |
2219 | MODULE_LICENSE("GPL v2"); |