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Commit | Line | Data |
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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> | |
b24c8b26 | 30 | #include <linux/mmc/card.h> |
f95f3850 WN |
31 | #include <linux/mmc/host.h> |
32 | #include <linux/mmc/mmc.h> | |
01730558 | 33 | #include <linux/mmc/sd.h> |
90c2143a | 34 | #include <linux/mmc/sdio.h> |
f95f3850 WN |
35 | #include <linux/mmc/dw_mmc.h> |
36 | #include <linux/bitops.h> | |
c07946a3 | 37 | #include <linux/regulator/consumer.h> |
c91eab4b | 38 | #include <linux/of.h> |
55a6ceb2 | 39 | #include <linux/of_gpio.h> |
bf626e55 | 40 | #include <linux/mmc/slot-gpio.h> |
f95f3850 WN |
41 | |
42 | #include "dw_mmc.h" | |
43 | ||
44 | /* Common flag combinations */ | |
3f7eec62 | 45 | #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \ |
f95f3850 | 46 | SDMMC_INT_HTO | SDMMC_INT_SBE | \ |
7a3c5677 | 47 | SDMMC_INT_EBE | SDMMC_INT_HLE) |
f95f3850 | 48 | #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ |
7a3c5677 | 49 | SDMMC_INT_RESP_ERR | SDMMC_INT_HLE) |
f95f3850 | 50 | #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ |
7a3c5677 | 51 | DW_MCI_CMD_ERROR_FLAGS) |
f95f3850 WN |
52 | #define DW_MCI_SEND_STATUS 1 |
53 | #define DW_MCI_RECV_STATUS 2 | |
54 | #define DW_MCI_DMA_THRESHOLD 16 | |
55 | ||
1f44a2a5 SJ |
56 | #define DW_MCI_FREQ_MAX 200000000 /* unit: HZ */ |
57 | #define DW_MCI_FREQ_MIN 400000 /* unit: HZ */ | |
58 | ||
fc79a4d6 JS |
59 | #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \ |
60 | SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ | |
61 | SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \ | |
62 | SDMMC_IDMAC_INT_TI) | |
63 | ||
cc190d4c SL |
64 | #define DESC_RING_BUF_SZ PAGE_SIZE |
65 | ||
69d99fdc PT |
66 | struct idmac_desc_64addr { |
67 | u32 des0; /* Control Descriptor */ | |
68 | ||
69 | u32 des1; /* Reserved */ | |
70 | ||
71 | u32 des2; /*Buffer sizes */ | |
72 | #define IDMAC_64ADDR_SET_BUFFER1_SIZE(d, s) \ | |
6687c42f BD |
73 | ((d)->des2 = ((d)->des2 & cpu_to_le32(0x03ffe000)) | \ |
74 | ((cpu_to_le32(s)) & cpu_to_le32(0x1fff))) | |
69d99fdc PT |
75 | |
76 | u32 des3; /* Reserved */ | |
77 | ||
78 | u32 des4; /* Lower 32-bits of Buffer Address Pointer 1*/ | |
79 | u32 des5; /* Upper 32-bits of Buffer Address Pointer 1*/ | |
80 | ||
81 | u32 des6; /* Lower 32-bits of Next Descriptor Address */ | |
82 | u32 des7; /* Upper 32-bits of Next Descriptor Address */ | |
83 | }; | |
84 | ||
f95f3850 | 85 | struct idmac_desc { |
6687c42f | 86 | __le32 des0; /* Control Descriptor */ |
f95f3850 WN |
87 | #define IDMAC_DES0_DIC BIT(1) |
88 | #define IDMAC_DES0_LD BIT(2) | |
89 | #define IDMAC_DES0_FD BIT(3) | |
90 | #define IDMAC_DES0_CH BIT(4) | |
91 | #define IDMAC_DES0_ER BIT(5) | |
92 | #define IDMAC_DES0_CES BIT(30) | |
93 | #define IDMAC_DES0_OWN BIT(31) | |
94 | ||
6687c42f | 95 | __le32 des1; /* Buffer sizes */ |
f95f3850 | 96 | #define IDMAC_SET_BUFFER1_SIZE(d, s) \ |
e5306c3a | 97 | ((d)->des1 = ((d)->des1 & cpu_to_le32(0x03ffe000)) | (cpu_to_le32((s) & 0x1fff))) |
f95f3850 | 98 | |
6687c42f | 99 | __le32 des2; /* buffer 1 physical address */ |
f95f3850 | 100 | |
6687c42f | 101 | __le32 des3; /* buffer 2 physical address */ |
f95f3850 | 102 | }; |
5959b32e AB |
103 | |
104 | /* Each descriptor can transfer up to 4KB of data in chained mode */ | |
105 | #define DW_MCI_DESC_DATA_LENGTH 0x1000 | |
f95f3850 | 106 | |
3a33a94c | 107 | static bool dw_mci_reset(struct dw_mci *host); |
536f6b91 | 108 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset); |
0bdbd0e8 | 109 | static int dw_mci_card_busy(struct mmc_host *mmc); |
56f6911c | 110 | static int dw_mci_get_cd(struct mmc_host *mmc); |
31bff450 | 111 | |
f95f3850 WN |
112 | #if defined(CONFIG_DEBUG_FS) |
113 | static int dw_mci_req_show(struct seq_file *s, void *v) | |
114 | { | |
115 | struct dw_mci_slot *slot = s->private; | |
116 | struct mmc_request *mrq; | |
117 | struct mmc_command *cmd; | |
118 | struct mmc_command *stop; | |
119 | struct mmc_data *data; | |
120 | ||
121 | /* Make sure we get a consistent snapshot */ | |
122 | spin_lock_bh(&slot->host->lock); | |
123 | mrq = slot->mrq; | |
124 | ||
125 | if (mrq) { | |
126 | cmd = mrq->cmd; | |
127 | data = mrq->data; | |
128 | stop = mrq->stop; | |
129 | ||
130 | if (cmd) | |
131 | seq_printf(s, | |
132 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
133 | cmd->opcode, cmd->arg, cmd->flags, | |
134 | cmd->resp[0], cmd->resp[1], cmd->resp[2], | |
135 | cmd->resp[2], cmd->error); | |
136 | if (data) | |
137 | seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", | |
138 | data->bytes_xfered, data->blocks, | |
139 | data->blksz, data->flags, data->error); | |
140 | if (stop) | |
141 | seq_printf(s, | |
142 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
143 | stop->opcode, stop->arg, stop->flags, | |
144 | stop->resp[0], stop->resp[1], stop->resp[2], | |
145 | stop->resp[2], stop->error); | |
146 | } | |
147 | ||
148 | spin_unlock_bh(&slot->host->lock); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | static int dw_mci_req_open(struct inode *inode, struct file *file) | |
154 | { | |
155 | return single_open(file, dw_mci_req_show, inode->i_private); | |
156 | } | |
157 | ||
158 | static const struct file_operations dw_mci_req_fops = { | |
159 | .owner = THIS_MODULE, | |
160 | .open = dw_mci_req_open, | |
161 | .read = seq_read, | |
162 | .llseek = seq_lseek, | |
163 | .release = single_release, | |
164 | }; | |
165 | ||
166 | static int dw_mci_regs_show(struct seq_file *s, void *v) | |
167 | { | |
168 | seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); | |
169 | seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); | |
170 | seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); | |
171 | seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); | |
172 | seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); | |
173 | seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | static int dw_mci_regs_open(struct inode *inode, struct file *file) | |
179 | { | |
180 | return single_open(file, dw_mci_regs_show, inode->i_private); | |
181 | } | |
182 | ||
183 | static const struct file_operations dw_mci_regs_fops = { | |
184 | .owner = THIS_MODULE, | |
185 | .open = dw_mci_regs_open, | |
186 | .read = seq_read, | |
187 | .llseek = seq_lseek, | |
188 | .release = single_release, | |
189 | }; | |
190 | ||
191 | static void dw_mci_init_debugfs(struct dw_mci_slot *slot) | |
192 | { | |
193 | struct mmc_host *mmc = slot->mmc; | |
194 | struct dw_mci *host = slot->host; | |
195 | struct dentry *root; | |
196 | struct dentry *node; | |
197 | ||
198 | root = mmc->debugfs_root; | |
199 | if (!root) | |
200 | return; | |
201 | ||
202 | node = debugfs_create_file("regs", S_IRUSR, root, host, | |
203 | &dw_mci_regs_fops); | |
204 | if (!node) | |
205 | goto err; | |
206 | ||
207 | node = debugfs_create_file("req", S_IRUSR, root, slot, | |
208 | &dw_mci_req_fops); | |
209 | if (!node) | |
210 | goto err; | |
211 | ||
212 | node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); | |
213 | if (!node) | |
214 | goto err; | |
215 | ||
216 | node = debugfs_create_x32("pending_events", S_IRUSR, root, | |
217 | (u32 *)&host->pending_events); | |
218 | if (!node) | |
219 | goto err; | |
220 | ||
221 | node = debugfs_create_x32("completed_events", S_IRUSR, root, | |
222 | (u32 *)&host->completed_events); | |
223 | if (!node) | |
224 | goto err; | |
225 | ||
226 | return; | |
227 | ||
228 | err: | |
229 | dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); | |
230 | } | |
231 | #endif /* defined(CONFIG_DEBUG_FS) */ | |
232 | ||
01730558 DA |
233 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg); |
234 | ||
f95f3850 WN |
235 | static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) |
236 | { | |
237 | struct mmc_data *data; | |
800d78bf | 238 | struct dw_mci_slot *slot = mmc_priv(mmc); |
01730558 | 239 | struct dw_mci *host = slot->host; |
f95f3850 | 240 | u32 cmdr; |
f95f3850 | 241 | |
0e3a22c0 | 242 | cmd->error = -EINPROGRESS; |
f95f3850 WN |
243 | cmdr = cmd->opcode; |
244 | ||
90c2143a SJ |
245 | if (cmd->opcode == MMC_STOP_TRANSMISSION || |
246 | cmd->opcode == MMC_GO_IDLE_STATE || | |
247 | cmd->opcode == MMC_GO_INACTIVE_STATE || | |
248 | (cmd->opcode == SD_IO_RW_DIRECT && | |
249 | ((cmd->arg >> 9) & 0x1FFFF) == SDIO_CCCR_ABORT)) | |
f95f3850 | 250 | cmdr |= SDMMC_CMD_STOP; |
4a1b27ad JC |
251 | else if (cmd->opcode != MMC_SEND_STATUS && cmd->data) |
252 | cmdr |= SDMMC_CMD_PRV_DAT_WAIT; | |
f95f3850 | 253 | |
01730558 DA |
254 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
255 | u32 clk_en_a; | |
256 | ||
257 | /* Special bit makes CMD11 not die */ | |
258 | cmdr |= SDMMC_CMD_VOLT_SWITCH; | |
259 | ||
260 | /* Change state to continue to handle CMD11 weirdness */ | |
261 | WARN_ON(slot->host->state != STATE_SENDING_CMD); | |
262 | slot->host->state = STATE_SENDING_CMD11; | |
263 | ||
264 | /* | |
265 | * We need to disable low power mode (automatic clock stop) | |
266 | * while doing voltage switch so we don't confuse the card, | |
267 | * since stopping the clock is a specific part of the UHS | |
268 | * voltage change dance. | |
269 | * | |
270 | * Note that low power mode (SDMMC_CLKEN_LOW_PWR) will be | |
271 | * unconditionally turned back on in dw_mci_setup_bus() if it's | |
272 | * ever called with a non-zero clock. That shouldn't happen | |
273 | * until the voltage change is all done. | |
274 | */ | |
275 | clk_en_a = mci_readl(host, CLKENA); | |
276 | clk_en_a &= ~(SDMMC_CLKEN_LOW_PWR << slot->id); | |
277 | mci_writel(host, CLKENA, clk_en_a); | |
278 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
279 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
280 | } | |
281 | ||
f95f3850 WN |
282 | if (cmd->flags & MMC_RSP_PRESENT) { |
283 | /* We expect a response, so set this bit */ | |
284 | cmdr |= SDMMC_CMD_RESP_EXP; | |
285 | if (cmd->flags & MMC_RSP_136) | |
286 | cmdr |= SDMMC_CMD_RESP_LONG; | |
287 | } | |
288 | ||
289 | if (cmd->flags & MMC_RSP_CRC) | |
290 | cmdr |= SDMMC_CMD_RESP_CRC; | |
291 | ||
292 | data = cmd->data; | |
293 | if (data) { | |
294 | cmdr |= SDMMC_CMD_DAT_EXP; | |
f95f3850 WN |
295 | if (data->flags & MMC_DATA_WRITE) |
296 | cmdr |= SDMMC_CMD_DAT_WR; | |
297 | } | |
298 | ||
aaaaeb7a JC |
299 | if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &slot->flags)) |
300 | cmdr |= SDMMC_CMD_USE_HOLD_REG; | |
800d78bf | 301 | |
f95f3850 WN |
302 | return cmdr; |
303 | } | |
304 | ||
90c2143a SJ |
305 | static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) |
306 | { | |
307 | struct mmc_command *stop; | |
308 | u32 cmdr; | |
309 | ||
310 | if (!cmd->data) | |
311 | return 0; | |
312 | ||
313 | stop = &host->stop_abort; | |
314 | cmdr = cmd->opcode; | |
315 | memset(stop, 0, sizeof(struct mmc_command)); | |
316 | ||
317 | if (cmdr == MMC_READ_SINGLE_BLOCK || | |
318 | cmdr == MMC_READ_MULTIPLE_BLOCK || | |
319 | cmdr == MMC_WRITE_BLOCK || | |
6c2c6506 UH |
320 | cmdr == MMC_WRITE_MULTIPLE_BLOCK || |
321 | cmdr == MMC_SEND_TUNING_BLOCK || | |
322 | cmdr == MMC_SEND_TUNING_BLOCK_HS200) { | |
90c2143a SJ |
323 | stop->opcode = MMC_STOP_TRANSMISSION; |
324 | stop->arg = 0; | |
325 | stop->flags = MMC_RSP_R1B | MMC_CMD_AC; | |
326 | } else if (cmdr == SD_IO_RW_EXTENDED) { | |
327 | stop->opcode = SD_IO_RW_DIRECT; | |
328 | stop->arg |= (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
329 | ((cmd->arg >> 28) & 0x7); | |
330 | stop->flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; | |
331 | } else { | |
332 | return 0; | |
333 | } | |
334 | ||
335 | cmdr = stop->opcode | SDMMC_CMD_STOP | | |
336 | SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; | |
337 | ||
338 | return cmdr; | |
339 | } | |
340 | ||
0bdbd0e8 DA |
341 | static void dw_mci_wait_while_busy(struct dw_mci *host, u32 cmd_flags) |
342 | { | |
343 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
344 | ||
345 | /* | |
346 | * Databook says that before issuing a new data transfer command | |
347 | * we need to check to see if the card is busy. Data transfer commands | |
348 | * all have SDMMC_CMD_PRV_DAT_WAIT set, so we'll key off that. | |
349 | * | |
350 | * ...also allow sending for SDMMC_CMD_VOLT_SWITCH where busy is | |
351 | * expected. | |
352 | */ | |
353 | if ((cmd_flags & SDMMC_CMD_PRV_DAT_WAIT) && | |
354 | !(cmd_flags & SDMMC_CMD_VOLT_SWITCH)) { | |
355 | while (mci_readl(host, STATUS) & SDMMC_STATUS_BUSY) { | |
356 | if (time_after(jiffies, timeout)) { | |
357 | /* Command will fail; we'll pass error then */ | |
358 | dev_err(host->dev, "Busy; trying anyway\n"); | |
359 | break; | |
360 | } | |
361 | udelay(10); | |
362 | } | |
363 | } | |
364 | } | |
365 | ||
f95f3850 WN |
366 | static void dw_mci_start_command(struct dw_mci *host, |
367 | struct mmc_command *cmd, u32 cmd_flags) | |
368 | { | |
369 | host->cmd = cmd; | |
4a90920c | 370 | dev_vdbg(host->dev, |
f95f3850 WN |
371 | "start command: ARGR=0x%08x CMDR=0x%08x\n", |
372 | cmd->arg, cmd_flags); | |
373 | ||
374 | mci_writel(host, CMDARG, cmd->arg); | |
0e3a22c0 | 375 | wmb(); /* drain writebuffer */ |
0bdbd0e8 | 376 | dw_mci_wait_while_busy(host, cmd_flags); |
f95f3850 WN |
377 | |
378 | mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); | |
379 | } | |
380 | ||
90c2143a | 381 | static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) |
f95f3850 | 382 | { |
90c2143a | 383 | struct mmc_command *stop = data->stop ? data->stop : &host->stop_abort; |
0e3a22c0 | 384 | |
90c2143a | 385 | dw_mci_start_command(host, stop, host->stop_cmdr); |
f95f3850 WN |
386 | } |
387 | ||
388 | /* DMA interface functions */ | |
389 | static void dw_mci_stop_dma(struct dw_mci *host) | |
390 | { | |
03e8cb53 | 391 | if (host->using_dma) { |
f95f3850 WN |
392 | host->dma_ops->stop(host); |
393 | host->dma_ops->cleanup(host); | |
f95f3850 | 394 | } |
aa50f259 SJ |
395 | |
396 | /* Data transfer was stopped by the interrupt handler */ | |
397 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
f95f3850 WN |
398 | } |
399 | ||
9aa51408 SJ |
400 | static int dw_mci_get_dma_dir(struct mmc_data *data) |
401 | { | |
402 | if (data->flags & MMC_DATA_WRITE) | |
403 | return DMA_TO_DEVICE; | |
404 | else | |
405 | return DMA_FROM_DEVICE; | |
406 | } | |
407 | ||
f95f3850 WN |
408 | static void dw_mci_dma_cleanup(struct dw_mci *host) |
409 | { | |
410 | struct mmc_data *data = host->data; | |
411 | ||
412 | if (data) | |
9aa51408 | 413 | if (!data->host_cookie) |
4a90920c | 414 | dma_unmap_sg(host->dev, |
9aa51408 SJ |
415 | data->sg, |
416 | data->sg_len, | |
417 | dw_mci_get_dma_dir(data)); | |
f95f3850 WN |
418 | } |
419 | ||
5ce9d961 SJ |
420 | static void dw_mci_idmac_reset(struct dw_mci *host) |
421 | { | |
422 | u32 bmod = mci_readl(host, BMOD); | |
423 | /* Software reset of DMA */ | |
424 | bmod |= SDMMC_IDMAC_SWRESET; | |
425 | mci_writel(host, BMOD, bmod); | |
426 | } | |
427 | ||
f95f3850 WN |
428 | static void dw_mci_idmac_stop_dma(struct dw_mci *host) |
429 | { | |
430 | u32 temp; | |
431 | ||
432 | /* Disable and reset the IDMAC interface */ | |
433 | temp = mci_readl(host, CTRL); | |
434 | temp &= ~SDMMC_CTRL_USE_IDMAC; | |
435 | temp |= SDMMC_CTRL_DMA_RESET; | |
436 | mci_writel(host, CTRL, temp); | |
437 | ||
438 | /* Stop the IDMAC running */ | |
439 | temp = mci_readl(host, BMOD); | |
a5289a43 | 440 | temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); |
5ce9d961 | 441 | temp |= SDMMC_IDMAC_SWRESET; |
f95f3850 WN |
442 | mci_writel(host, BMOD, temp); |
443 | } | |
444 | ||
3fc7eaef | 445 | static void dw_mci_dmac_complete_dma(void *arg) |
f95f3850 | 446 | { |
3fc7eaef | 447 | struct dw_mci *host = arg; |
f95f3850 WN |
448 | struct mmc_data *data = host->data; |
449 | ||
4a90920c | 450 | dev_vdbg(host->dev, "DMA complete\n"); |
f95f3850 | 451 | |
3fc7eaef SL |
452 | if ((host->use_dma == TRANS_MODE_EDMAC) && |
453 | data && (data->flags & MMC_DATA_READ)) | |
454 | /* Invalidate cache after read */ | |
455 | dma_sync_sg_for_cpu(mmc_dev(host->cur_slot->mmc), | |
456 | data->sg, | |
457 | data->sg_len, | |
458 | DMA_FROM_DEVICE); | |
459 | ||
f95f3850 WN |
460 | host->dma_ops->cleanup(host); |
461 | ||
462 | /* | |
463 | * If the card was removed, data will be NULL. No point in trying to | |
464 | * send the stop command or waiting for NBUSY in this case. | |
465 | */ | |
466 | if (data) { | |
467 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
468 | tasklet_schedule(&host->tasklet); | |
469 | } | |
470 | } | |
471 | ||
3b2a067b SL |
472 | static int dw_mci_idmac_init(struct dw_mci *host) |
473 | { | |
474 | int i; | |
475 | ||
476 | if (host->dma_64bit_address == 1) { | |
477 | struct idmac_desc_64addr *p; | |
478 | /* Number of descriptors in the ring buffer */ | |
cc190d4c SL |
479 | host->ring_size = |
480 | DESC_RING_BUF_SZ / sizeof(struct idmac_desc_64addr); | |
3b2a067b SL |
481 | |
482 | /* Forward link the descriptor list */ | |
483 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; | |
484 | i++, p++) { | |
485 | p->des6 = (host->sg_dma + | |
486 | (sizeof(struct idmac_desc_64addr) * | |
487 | (i + 1))) & 0xffffffff; | |
488 | ||
489 | p->des7 = (u64)(host->sg_dma + | |
490 | (sizeof(struct idmac_desc_64addr) * | |
491 | (i + 1))) >> 32; | |
492 | /* Initialize reserved and buffer size fields to "0" */ | |
493 | p->des1 = 0; | |
494 | p->des2 = 0; | |
495 | p->des3 = 0; | |
496 | } | |
497 | ||
498 | /* Set the last descriptor as the end-of-ring descriptor */ | |
499 | p->des6 = host->sg_dma & 0xffffffff; | |
500 | p->des7 = (u64)host->sg_dma >> 32; | |
501 | p->des0 = IDMAC_DES0_ER; | |
502 | ||
503 | } else { | |
504 | struct idmac_desc *p; | |
505 | /* Number of descriptors in the ring buffer */ | |
cc190d4c SL |
506 | host->ring_size = |
507 | DESC_RING_BUF_SZ / sizeof(struct idmac_desc); | |
3b2a067b SL |
508 | |
509 | /* Forward link the descriptor list */ | |
510 | for (i = 0, p = host->sg_cpu; | |
511 | i < host->ring_size - 1; | |
512 | i++, p++) { | |
513 | p->des3 = cpu_to_le32(host->sg_dma + | |
514 | (sizeof(struct idmac_desc) * (i + 1))); | |
515 | p->des1 = 0; | |
516 | } | |
517 | ||
518 | /* Set the last descriptor as the end-of-ring descriptor */ | |
519 | p->des3 = cpu_to_le32(host->sg_dma); | |
520 | p->des0 = cpu_to_le32(IDMAC_DES0_ER); | |
521 | } | |
522 | ||
523 | dw_mci_idmac_reset(host); | |
524 | ||
525 | if (host->dma_64bit_address == 1) { | |
526 | /* Mask out interrupts - get Tx & Rx complete only */ | |
527 | mci_writel(host, IDSTS64, IDMAC_INT_CLR); | |
528 | mci_writel(host, IDINTEN64, SDMMC_IDMAC_INT_NI | | |
529 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
530 | ||
531 | /* Set the descriptor base address */ | |
532 | mci_writel(host, DBADDRL, host->sg_dma & 0xffffffff); | |
533 | mci_writel(host, DBADDRU, (u64)host->sg_dma >> 32); | |
534 | ||
535 | } else { | |
536 | /* Mask out interrupts - get Tx & Rx complete only */ | |
537 | mci_writel(host, IDSTS, IDMAC_INT_CLR); | |
538 | mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | | |
539 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
540 | ||
541 | /* Set the descriptor base address */ | |
542 | mci_writel(host, DBADDR, host->sg_dma); | |
543 | } | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | static inline int dw_mci_prepare_desc64(struct dw_mci *host, | |
ec0baaa6 SL |
549 | struct mmc_data *data, |
550 | unsigned int sg_len) | |
f95f3850 | 551 | { |
5959b32e | 552 | unsigned int desc_len; |
ec0baaa6 | 553 | struct idmac_desc_64addr *desc_first, *desc_last, *desc; |
3b2a067b | 554 | unsigned long timeout; |
f95f3850 | 555 | int i; |
0e3a22c0 | 556 | |
ec0baaa6 | 557 | desc_first = desc_last = desc = host->sg_cpu; |
5959b32e | 558 | |
ec0baaa6 SL |
559 | for (i = 0; i < sg_len; i++) { |
560 | unsigned int length = sg_dma_len(&data->sg[i]); | |
69d99fdc | 561 | |
ec0baaa6 | 562 | u64 mem_addr = sg_dma_address(&data->sg[i]); |
0e3a22c0 | 563 | |
ec0baaa6 SL |
564 | for ( ; length ; desc++) { |
565 | desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? | |
566 | length : DW_MCI_DESC_DATA_LENGTH; | |
f95f3850 | 567 | |
ec0baaa6 | 568 | length -= desc_len; |
5959b32e | 569 | |
3b2a067b SL |
570 | /* |
571 | * Wait for the former clear OWN bit operation | |
572 | * of IDMAC to make sure that this descriptor | |
573 | * isn't still owned by IDMAC as IDMAC's write | |
574 | * ops and CPU's read ops are asynchronous. | |
575 | */ | |
576 | timeout = jiffies + msecs_to_jiffies(100); | |
577 | while (readl(&desc->des0) & IDMAC_DES0_OWN) { | |
578 | if (time_after(jiffies, timeout)) | |
579 | goto err_own_bit; | |
580 | udelay(10); | |
581 | } | |
582 | ||
ec0baaa6 SL |
583 | /* |
584 | * Set the OWN bit and disable interrupts | |
585 | * for this descriptor | |
586 | */ | |
587 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | | |
588 | IDMAC_DES0_CH; | |
5959b32e | 589 | |
ec0baaa6 SL |
590 | /* Buffer length */ |
591 | IDMAC_64ADDR_SET_BUFFER1_SIZE(desc, desc_len); | |
5959b32e | 592 | |
ec0baaa6 SL |
593 | /* Physical address to DMA to/from */ |
594 | desc->des4 = mem_addr & 0xffffffff; | |
595 | desc->des5 = mem_addr >> 32; | |
5959b32e | 596 | |
ec0baaa6 SL |
597 | /* Update physical address for the next desc */ |
598 | mem_addr += desc_len; | |
5959b32e | 599 | |
ec0baaa6 SL |
600 | /* Save pointer to the last descriptor */ |
601 | desc_last = desc; | |
69d99fdc | 602 | } |
ec0baaa6 | 603 | } |
f95f3850 | 604 | |
ec0baaa6 SL |
605 | /* Set first descriptor */ |
606 | desc_first->des0 |= IDMAC_DES0_FD; | |
f95f3850 | 607 | |
ec0baaa6 SL |
608 | /* Set last descriptor */ |
609 | desc_last->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); | |
610 | desc_last->des0 |= IDMAC_DES0_LD; | |
3b2a067b SL |
611 | |
612 | return 0; | |
613 | err_own_bit: | |
614 | /* restore the descriptor chain as it's polluted */ | |
615 | dev_dbg(host->dev, "desciptor is still owned by IDMAC.\n"); | |
cc190d4c | 616 | memset(host->sg_cpu, 0, DESC_RING_BUF_SZ); |
3b2a067b SL |
617 | dw_mci_idmac_init(host); |
618 | return -EINVAL; | |
ec0baaa6 | 619 | } |
5959b32e | 620 | |
69d99fdc | 621 | |
3b2a067b | 622 | static inline int dw_mci_prepare_desc32(struct dw_mci *host, |
ec0baaa6 SL |
623 | struct mmc_data *data, |
624 | unsigned int sg_len) | |
625 | { | |
626 | unsigned int desc_len; | |
627 | struct idmac_desc *desc_first, *desc_last, *desc; | |
3b2a067b | 628 | unsigned long timeout; |
ec0baaa6 | 629 | int i; |
0e3a22c0 | 630 | |
ec0baaa6 | 631 | desc_first = desc_last = desc = host->sg_cpu; |
69d99fdc | 632 | |
ec0baaa6 SL |
633 | for (i = 0; i < sg_len; i++) { |
634 | unsigned int length = sg_dma_len(&data->sg[i]); | |
5959b32e | 635 | |
ec0baaa6 | 636 | u32 mem_addr = sg_dma_address(&data->sg[i]); |
5959b32e | 637 | |
ec0baaa6 SL |
638 | for ( ; length ; desc++) { |
639 | desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? | |
640 | length : DW_MCI_DESC_DATA_LENGTH; | |
5959b32e | 641 | |
ec0baaa6 | 642 | length -= desc_len; |
f95f3850 | 643 | |
3b2a067b SL |
644 | /* |
645 | * Wait for the former clear OWN bit operation | |
646 | * of IDMAC to make sure that this descriptor | |
647 | * isn't still owned by IDMAC as IDMAC's write | |
648 | * ops and CPU's read ops are asynchronous. | |
649 | */ | |
650 | timeout = jiffies + msecs_to_jiffies(100); | |
651 | while (readl(&desc->des0) & | |
652 | cpu_to_le32(IDMAC_DES0_OWN)) { | |
653 | if (time_after(jiffies, timeout)) | |
654 | goto err_own_bit; | |
655 | udelay(10); | |
656 | } | |
657 | ||
ec0baaa6 SL |
658 | /* |
659 | * Set the OWN bit and disable interrupts | |
660 | * for this descriptor | |
661 | */ | |
662 | desc->des0 = cpu_to_le32(IDMAC_DES0_OWN | | |
663 | IDMAC_DES0_DIC | | |
664 | IDMAC_DES0_CH); | |
5959b32e | 665 | |
ec0baaa6 SL |
666 | /* Buffer length */ |
667 | IDMAC_SET_BUFFER1_SIZE(desc, desc_len); | |
5959b32e | 668 | |
ec0baaa6 SL |
669 | /* Physical address to DMA to/from */ |
670 | desc->des2 = cpu_to_le32(mem_addr); | |
69d99fdc | 671 | |
ec0baaa6 SL |
672 | /* Update physical address for the next desc */ |
673 | mem_addr += desc_len; | |
f95f3850 | 674 | |
ec0baaa6 SL |
675 | /* Save pointer to the last descriptor */ |
676 | desc_last = desc; | |
677 | } | |
69d99fdc | 678 | } |
f95f3850 | 679 | |
ec0baaa6 SL |
680 | /* Set first descriptor */ |
681 | desc_first->des0 |= cpu_to_le32(IDMAC_DES0_FD); | |
682 | ||
683 | /* Set last descriptor */ | |
684 | desc_last->des0 &= cpu_to_le32(~(IDMAC_DES0_CH | | |
685 | IDMAC_DES0_DIC)); | |
686 | desc_last->des0 |= cpu_to_le32(IDMAC_DES0_LD); | |
3b2a067b SL |
687 | |
688 | return 0; | |
689 | err_own_bit: | |
690 | /* restore the descriptor chain as it's polluted */ | |
691 | dev_dbg(host->dev, "desciptor is still owned by IDMAC.\n"); | |
cc190d4c | 692 | memset(host->sg_cpu, 0, DESC_RING_BUF_SZ); |
3b2a067b SL |
693 | dw_mci_idmac_init(host); |
694 | return -EINVAL; | |
f95f3850 WN |
695 | } |
696 | ||
3fc7eaef | 697 | static int dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) |
f95f3850 WN |
698 | { |
699 | u32 temp; | |
3b2a067b | 700 | int ret; |
f95f3850 | 701 | |
ec0baaa6 | 702 | if (host->dma_64bit_address == 1) |
3b2a067b | 703 | ret = dw_mci_prepare_desc64(host, host->data, sg_len); |
ec0baaa6 | 704 | else |
3b2a067b SL |
705 | ret = dw_mci_prepare_desc32(host, host->data, sg_len); |
706 | ||
707 | if (ret) | |
708 | goto out; | |
ec0baaa6 SL |
709 | |
710 | /* drain writebuffer */ | |
711 | wmb(); | |
f95f3850 | 712 | |
536f6b91 SR |
713 | /* Make sure to reset DMA in case we did PIO before this */ |
714 | dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET); | |
715 | dw_mci_idmac_reset(host); | |
716 | ||
f95f3850 WN |
717 | /* Select IDMAC interface */ |
718 | temp = mci_readl(host, CTRL); | |
719 | temp |= SDMMC_CTRL_USE_IDMAC; | |
720 | mci_writel(host, CTRL, temp); | |
721 | ||
0e3a22c0 | 722 | /* drain writebuffer */ |
f95f3850 WN |
723 | wmb(); |
724 | ||
725 | /* Enable the IDMAC */ | |
726 | temp = mci_readl(host, BMOD); | |
a5289a43 | 727 | temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; |
f95f3850 WN |
728 | mci_writel(host, BMOD, temp); |
729 | ||
730 | /* Start it running */ | |
731 | mci_writel(host, PLDMND, 1); | |
3fc7eaef | 732 | |
3b2a067b SL |
733 | out: |
734 | return ret; | |
f95f3850 WN |
735 | } |
736 | ||
8e2b36ea | 737 | static const struct dw_mci_dma_ops dw_mci_idmac_ops = { |
885c3e80 SJ |
738 | .init = dw_mci_idmac_init, |
739 | .start = dw_mci_idmac_start_dma, | |
740 | .stop = dw_mci_idmac_stop_dma, | |
3fc7eaef SL |
741 | .complete = dw_mci_dmac_complete_dma, |
742 | .cleanup = dw_mci_dma_cleanup, | |
743 | }; | |
744 | ||
745 | static void dw_mci_edmac_stop_dma(struct dw_mci *host) | |
746 | { | |
ab925a31 | 747 | dmaengine_terminate_async(host->dms->ch); |
3fc7eaef SL |
748 | } |
749 | ||
750 | static int dw_mci_edmac_start_dma(struct dw_mci *host, | |
751 | unsigned int sg_len) | |
752 | { | |
753 | struct dma_slave_config cfg; | |
754 | struct dma_async_tx_descriptor *desc = NULL; | |
755 | struct scatterlist *sgl = host->data->sg; | |
756 | const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; | |
757 | u32 sg_elems = host->data->sg_len; | |
758 | u32 fifoth_val; | |
759 | u32 fifo_offset = host->fifo_reg - host->regs; | |
760 | int ret = 0; | |
761 | ||
762 | /* Set external dma config: burst size, burst width */ | |
260b3164 | 763 | cfg.dst_addr = host->phy_regs + fifo_offset; |
3fc7eaef SL |
764 | cfg.src_addr = cfg.dst_addr; |
765 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
766 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
767 | ||
768 | /* Match burst msize with external dma config */ | |
769 | fifoth_val = mci_readl(host, FIFOTH); | |
770 | cfg.dst_maxburst = mszs[(fifoth_val >> 28) & 0x7]; | |
771 | cfg.src_maxburst = cfg.dst_maxburst; | |
772 | ||
773 | if (host->data->flags & MMC_DATA_WRITE) | |
774 | cfg.direction = DMA_MEM_TO_DEV; | |
775 | else | |
776 | cfg.direction = DMA_DEV_TO_MEM; | |
777 | ||
778 | ret = dmaengine_slave_config(host->dms->ch, &cfg); | |
779 | if (ret) { | |
780 | dev_err(host->dev, "Failed to config edmac.\n"); | |
781 | return -EBUSY; | |
782 | } | |
783 | ||
784 | desc = dmaengine_prep_slave_sg(host->dms->ch, sgl, | |
785 | sg_len, cfg.direction, | |
786 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
787 | if (!desc) { | |
788 | dev_err(host->dev, "Can't prepare slave sg.\n"); | |
789 | return -EBUSY; | |
790 | } | |
791 | ||
792 | /* Set dw_mci_dmac_complete_dma as callback */ | |
793 | desc->callback = dw_mci_dmac_complete_dma; | |
794 | desc->callback_param = (void *)host; | |
795 | dmaengine_submit(desc); | |
796 | ||
797 | /* Flush cache before write */ | |
798 | if (host->data->flags & MMC_DATA_WRITE) | |
799 | dma_sync_sg_for_device(mmc_dev(host->cur_slot->mmc), sgl, | |
800 | sg_elems, DMA_TO_DEVICE); | |
801 | ||
802 | dma_async_issue_pending(host->dms->ch); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | static int dw_mci_edmac_init(struct dw_mci *host) | |
808 | { | |
809 | /* Request external dma channel */ | |
810 | host->dms = kzalloc(sizeof(struct dw_mci_dma_slave), GFP_KERNEL); | |
811 | if (!host->dms) | |
812 | return -ENOMEM; | |
813 | ||
814 | host->dms->ch = dma_request_slave_channel(host->dev, "rx-tx"); | |
815 | if (!host->dms->ch) { | |
4539d36e | 816 | dev_err(host->dev, "Failed to get external DMA channel.\n"); |
3fc7eaef SL |
817 | kfree(host->dms); |
818 | host->dms = NULL; | |
819 | return -ENXIO; | |
820 | } | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static void dw_mci_edmac_exit(struct dw_mci *host) | |
826 | { | |
827 | if (host->dms) { | |
828 | if (host->dms->ch) { | |
829 | dma_release_channel(host->dms->ch); | |
830 | host->dms->ch = NULL; | |
831 | } | |
832 | kfree(host->dms); | |
833 | host->dms = NULL; | |
834 | } | |
835 | } | |
836 | ||
837 | static const struct dw_mci_dma_ops dw_mci_edmac_ops = { | |
838 | .init = dw_mci_edmac_init, | |
839 | .exit = dw_mci_edmac_exit, | |
840 | .start = dw_mci_edmac_start_dma, | |
841 | .stop = dw_mci_edmac_stop_dma, | |
842 | .complete = dw_mci_dmac_complete_dma, | |
885c3e80 SJ |
843 | .cleanup = dw_mci_dma_cleanup, |
844 | }; | |
885c3e80 | 845 | |
9aa51408 SJ |
846 | static int dw_mci_pre_dma_transfer(struct dw_mci *host, |
847 | struct mmc_data *data, | |
848 | bool next) | |
f95f3850 WN |
849 | { |
850 | struct scatterlist *sg; | |
9aa51408 | 851 | unsigned int i, sg_len; |
03e8cb53 | 852 | |
9aa51408 SJ |
853 | if (!next && data->host_cookie) |
854 | return data->host_cookie; | |
f95f3850 WN |
855 | |
856 | /* | |
857 | * We don't do DMA on "complex" transfers, i.e. with | |
858 | * non-word-aligned buffers or lengths. Also, we don't bother | |
859 | * with all the DMA setup overhead for short transfers. | |
860 | */ | |
861 | if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) | |
862 | return -EINVAL; | |
9aa51408 | 863 | |
f95f3850 WN |
864 | if (data->blksz & 3) |
865 | return -EINVAL; | |
866 | ||
867 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
868 | if (sg->offset & 3 || sg->length & 3) | |
869 | return -EINVAL; | |
870 | } | |
871 | ||
4a90920c | 872 | sg_len = dma_map_sg(host->dev, |
9aa51408 SJ |
873 | data->sg, |
874 | data->sg_len, | |
875 | dw_mci_get_dma_dir(data)); | |
876 | if (sg_len == 0) | |
877 | return -EINVAL; | |
03e8cb53 | 878 | |
9aa51408 SJ |
879 | if (next) |
880 | data->host_cookie = sg_len; | |
f95f3850 | 881 | |
9aa51408 SJ |
882 | return sg_len; |
883 | } | |
884 | ||
9aa51408 SJ |
885 | static void dw_mci_pre_req(struct mmc_host *mmc, |
886 | struct mmc_request *mrq, | |
887 | bool is_first_req) | |
888 | { | |
889 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
890 | struct mmc_data *data = mrq->data; | |
891 | ||
892 | if (!slot->host->use_dma || !data) | |
893 | return; | |
894 | ||
895 | if (data->host_cookie) { | |
896 | data->host_cookie = 0; | |
897 | return; | |
898 | } | |
899 | ||
900 | if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) | |
901 | data->host_cookie = 0; | |
902 | } | |
903 | ||
904 | static void dw_mci_post_req(struct mmc_host *mmc, | |
905 | struct mmc_request *mrq, | |
906 | int err) | |
907 | { | |
908 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
909 | struct mmc_data *data = mrq->data; | |
910 | ||
911 | if (!slot->host->use_dma || !data) | |
912 | return; | |
913 | ||
914 | if (data->host_cookie) | |
4a90920c | 915 | dma_unmap_sg(slot->host->dev, |
9aa51408 SJ |
916 | data->sg, |
917 | data->sg_len, | |
918 | dw_mci_get_dma_dir(data)); | |
919 | data->host_cookie = 0; | |
920 | } | |
921 | ||
52426899 SJ |
922 | static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) |
923 | { | |
52426899 SJ |
924 | unsigned int blksz = data->blksz; |
925 | const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; | |
926 | u32 fifo_width = 1 << host->data_shift; | |
927 | u32 blksz_depth = blksz / fifo_width, fifoth_val; | |
928 | u32 msize = 0, rx_wmark = 1, tx_wmark, tx_wmark_invers; | |
0e3a22c0 | 929 | int idx = ARRAY_SIZE(mszs) - 1; |
52426899 | 930 | |
3fc7eaef SL |
931 | /* pio should ship this scenario */ |
932 | if (!host->use_dma) | |
933 | return; | |
934 | ||
52426899 SJ |
935 | tx_wmark = (host->fifo_depth) / 2; |
936 | tx_wmark_invers = host->fifo_depth - tx_wmark; | |
937 | ||
938 | /* | |
939 | * MSIZE is '1', | |
940 | * if blksz is not a multiple of the FIFO width | |
941 | */ | |
20753569 | 942 | if (blksz % fifo_width) |
52426899 | 943 | goto done; |
52426899 SJ |
944 | |
945 | do { | |
946 | if (!((blksz_depth % mszs[idx]) || | |
947 | (tx_wmark_invers % mszs[idx]))) { | |
948 | msize = idx; | |
949 | rx_wmark = mszs[idx] - 1; | |
950 | break; | |
951 | } | |
952 | } while (--idx > 0); | |
953 | /* | |
954 | * If idx is '0', it won't be tried | |
955 | * Thus, initial values are uesed | |
956 | */ | |
957 | done: | |
958 | fifoth_val = SDMMC_SET_FIFOTH(msize, rx_wmark, tx_wmark); | |
959 | mci_writel(host, FIFOTH, fifoth_val); | |
52426899 SJ |
960 | } |
961 | ||
7e4bf1bc | 962 | static void dw_mci_ctrl_thld(struct dw_mci *host, struct mmc_data *data) |
f1d2736c SJ |
963 | { |
964 | unsigned int blksz = data->blksz; | |
965 | u32 blksz_depth, fifo_depth; | |
966 | u16 thld_size; | |
7e4bf1bc | 967 | u8 enable; |
f1d2736c | 968 | |
66dfd101 JH |
969 | /* |
970 | * CDTHRCTL doesn't exist prior to 240A (in fact that register offset is | |
971 | * in the FIFO region, so we really shouldn't access it). | |
972 | */ | |
7e4bf1bc JC |
973 | if (host->verid < DW_MMC_240A || |
974 | (host->verid < DW_MMC_280A && data->flags & MMC_DATA_WRITE)) | |
975 | return; | |
976 | ||
977 | /* | |
978 | * Card write Threshold is introduced since 2.80a | |
979 | * It's used when HS400 mode is enabled. | |
980 | */ | |
981 | if (data->flags & MMC_DATA_WRITE && | |
982 | !(host->timing != MMC_TIMING_MMC_HS400)) | |
66dfd101 JH |
983 | return; |
984 | ||
7e4bf1bc JC |
985 | if (data->flags & MMC_DATA_WRITE) |
986 | enable = SDMMC_CARD_WR_THR_EN; | |
987 | else | |
988 | enable = SDMMC_CARD_RD_THR_EN; | |
989 | ||
f1d2736c SJ |
990 | if (host->timing != MMC_TIMING_MMC_HS200 && |
991 | host->timing != MMC_TIMING_UHS_SDR104) | |
992 | goto disable; | |
993 | ||
994 | blksz_depth = blksz / (1 << host->data_shift); | |
995 | fifo_depth = host->fifo_depth; | |
996 | ||
997 | if (blksz_depth > fifo_depth) | |
998 | goto disable; | |
999 | ||
1000 | /* | |
1001 | * If (blksz_depth) >= (fifo_depth >> 1), should be 'thld_size <= blksz' | |
1002 | * If (blksz_depth) < (fifo_depth >> 1), should be thld_size = blksz | |
1003 | * Currently just choose blksz. | |
1004 | */ | |
1005 | thld_size = blksz; | |
7e4bf1bc | 1006 | mci_writel(host, CDTHRCTL, SDMMC_SET_THLD(thld_size, enable)); |
f1d2736c SJ |
1007 | return; |
1008 | ||
1009 | disable: | |
7e4bf1bc | 1010 | mci_writel(host, CDTHRCTL, 0); |
f1d2736c SJ |
1011 | } |
1012 | ||
9aa51408 SJ |
1013 | static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) |
1014 | { | |
f8c58c11 | 1015 | unsigned long irqflags; |
9aa51408 SJ |
1016 | int sg_len; |
1017 | u32 temp; | |
1018 | ||
1019 | host->using_dma = 0; | |
1020 | ||
1021 | /* If we don't have a channel, we can't do DMA */ | |
1022 | if (!host->use_dma) | |
1023 | return -ENODEV; | |
1024 | ||
1025 | sg_len = dw_mci_pre_dma_transfer(host, data, 0); | |
a99aa9b9 SJ |
1026 | if (sg_len < 0) { |
1027 | host->dma_ops->stop(host); | |
9aa51408 | 1028 | return sg_len; |
a99aa9b9 | 1029 | } |
9aa51408 SJ |
1030 | |
1031 | host->using_dma = 1; | |
f95f3850 | 1032 | |
3fc7eaef SL |
1033 | if (host->use_dma == TRANS_MODE_IDMAC) |
1034 | dev_vdbg(host->dev, | |
1035 | "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", | |
1036 | (unsigned long)host->sg_cpu, | |
1037 | (unsigned long)host->sg_dma, | |
1038 | sg_len); | |
f95f3850 | 1039 | |
52426899 SJ |
1040 | /* |
1041 | * Decide the MSIZE and RX/TX Watermark. | |
1042 | * If current block size is same with previous size, | |
1043 | * no need to update fifoth. | |
1044 | */ | |
1045 | if (host->prev_blksz != data->blksz) | |
1046 | dw_mci_adjust_fifoth(host, data); | |
1047 | ||
f95f3850 WN |
1048 | /* Enable the DMA interface */ |
1049 | temp = mci_readl(host, CTRL); | |
1050 | temp |= SDMMC_CTRL_DMA_ENABLE; | |
1051 | mci_writel(host, CTRL, temp); | |
1052 | ||
1053 | /* Disable RX/TX IRQs, let DMA handle it */ | |
f8c58c11 | 1054 | spin_lock_irqsave(&host->irq_lock, irqflags); |
f95f3850 WN |
1055 | temp = mci_readl(host, INTMASK); |
1056 | temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); | |
1057 | mci_writel(host, INTMASK, temp); | |
f8c58c11 | 1058 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
f95f3850 | 1059 | |
3fc7eaef | 1060 | if (host->dma_ops->start(host, sg_len)) { |
d12d0cb1 SL |
1061 | /* We can't do DMA, try PIO for this one */ |
1062 | dev_dbg(host->dev, | |
1063 | "%s: fall back to PIO mode for current transfer\n", | |
1064 | __func__); | |
3fc7eaef SL |
1065 | return -ENODEV; |
1066 | } | |
f95f3850 WN |
1067 | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) | |
1072 | { | |
f8c58c11 | 1073 | unsigned long irqflags; |
0e3a22c0 | 1074 | int flags = SG_MITER_ATOMIC; |
f95f3850 WN |
1075 | u32 temp; |
1076 | ||
1077 | data->error = -EINPROGRESS; | |
1078 | ||
1079 | WARN_ON(host->data); | |
1080 | host->sg = NULL; | |
1081 | host->data = data; | |
1082 | ||
7e4bf1bc | 1083 | if (data->flags & MMC_DATA_READ) |
55c5efbc | 1084 | host->dir_status = DW_MCI_RECV_STATUS; |
7e4bf1bc | 1085 | else |
55c5efbc | 1086 | host->dir_status = DW_MCI_SEND_STATUS; |
7e4bf1bc JC |
1087 | |
1088 | dw_mci_ctrl_thld(host, data); | |
55c5efbc | 1089 | |
f95f3850 | 1090 | if (dw_mci_submit_data_dma(host, data)) { |
f9c2a0dc SJ |
1091 | if (host->data->flags & MMC_DATA_READ) |
1092 | flags |= SG_MITER_TO_SG; | |
1093 | else | |
1094 | flags |= SG_MITER_FROM_SG; | |
1095 | ||
1096 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
f95f3850 | 1097 | host->sg = data->sg; |
34b664a2 JH |
1098 | host->part_buf_start = 0; |
1099 | host->part_buf_count = 0; | |
f95f3850 | 1100 | |
b40af3aa | 1101 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); |
f8c58c11 DA |
1102 | |
1103 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
f95f3850 WN |
1104 | temp = mci_readl(host, INTMASK); |
1105 | temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; | |
1106 | mci_writel(host, INTMASK, temp); | |
f8c58c11 | 1107 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
f95f3850 WN |
1108 | |
1109 | temp = mci_readl(host, CTRL); | |
1110 | temp &= ~SDMMC_CTRL_DMA_ENABLE; | |
1111 | mci_writel(host, CTRL, temp); | |
52426899 SJ |
1112 | |
1113 | /* | |
1114 | * Use the initial fifoth_val for PIO mode. | |
1115 | * If next issued data may be transfered by DMA mode, | |
1116 | * prev_blksz should be invalidated. | |
1117 | */ | |
1118 | mci_writel(host, FIFOTH, host->fifoth_val); | |
1119 | host->prev_blksz = 0; | |
1120 | } else { | |
1121 | /* | |
1122 | * Keep the current block size. | |
1123 | * It will be used to decide whether to update | |
1124 | * fifoth register next time. | |
1125 | */ | |
1126 | host->prev_blksz = data->blksz; | |
f95f3850 WN |
1127 | } |
1128 | } | |
1129 | ||
1130 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) | |
1131 | { | |
1132 | struct dw_mci *host = slot->host; | |
1133 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
1134 | unsigned int cmd_status = 0; | |
1135 | ||
1136 | mci_writel(host, CMDARG, arg); | |
0e3a22c0 | 1137 | wmb(); /* drain writebuffer */ |
0bdbd0e8 | 1138 | dw_mci_wait_while_busy(host, cmd); |
f95f3850 WN |
1139 | mci_writel(host, CMD, SDMMC_CMD_START | cmd); |
1140 | ||
1141 | while (time_before(jiffies, timeout)) { | |
1142 | cmd_status = mci_readl(host, CMD); | |
1143 | if (!(cmd_status & SDMMC_CMD_START)) | |
1144 | return; | |
1145 | } | |
1146 | dev_err(&slot->mmc->class_dev, | |
1147 | "Timeout sending command (cmd %#x arg %#x status %#x)\n", | |
1148 | cmd, arg, cmd_status); | |
1149 | } | |
1150 | ||
ab269128 | 1151 | static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) |
f95f3850 WN |
1152 | { |
1153 | struct dw_mci *host = slot->host; | |
fdf492a1 | 1154 | unsigned int clock = slot->clock; |
f95f3850 | 1155 | u32 div; |
9623b5b9 | 1156 | u32 clk_en_a; |
01730558 DA |
1157 | u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT; |
1158 | ||
1159 | /* We must continue to set bit 28 in CMD until the change is complete */ | |
1160 | if (host->state == STATE_WAITING_CMD11_DONE) | |
1161 | sdmmc_cmd_bits |= SDMMC_CMD_VOLT_SWITCH; | |
f95f3850 | 1162 | |
fdf492a1 DA |
1163 | if (!clock) { |
1164 | mci_writel(host, CLKENA, 0); | |
01730558 | 1165 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
fdf492a1 DA |
1166 | } else if (clock != host->current_speed || force_clkinit) { |
1167 | div = host->bus_hz / clock; | |
1168 | if (host->bus_hz % clock && host->bus_hz > clock) | |
f95f3850 WN |
1169 | /* |
1170 | * move the + 1 after the divide to prevent | |
1171 | * over-clocking the card. | |
1172 | */ | |
e419990b SJ |
1173 | div += 1; |
1174 | ||
fdf492a1 | 1175 | div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; |
f95f3850 | 1176 | |
005d675a JC |
1177 | if (clock != slot->__clk_old || force_clkinit) |
1178 | dev_info(&slot->mmc->class_dev, | |
1179 | "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", | |
1180 | slot->id, host->bus_hz, clock, | |
1181 | div ? ((host->bus_hz / div) >> 1) : | |
1182 | host->bus_hz, div); | |
f95f3850 WN |
1183 | |
1184 | /* disable clock */ | |
1185 | mci_writel(host, CLKENA, 0); | |
1186 | mci_writel(host, CLKSRC, 0); | |
1187 | ||
1188 | /* inform CIU */ | |
01730558 | 1189 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 WN |
1190 | |
1191 | /* set clock to desired speed */ | |
1192 | mci_writel(host, CLKDIV, div); | |
1193 | ||
1194 | /* inform CIU */ | |
01730558 | 1195 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 | 1196 | |
9623b5b9 DA |
1197 | /* enable clock; only low power if no SDIO */ |
1198 | clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; | |
b24c8b26 | 1199 | if (!test_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags)) |
9623b5b9 DA |
1200 | clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; |
1201 | mci_writel(host, CLKENA, clk_en_a); | |
f95f3850 WN |
1202 | |
1203 | /* inform CIU */ | |
01730558 | 1204 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
005d675a JC |
1205 | |
1206 | /* keep the last clock value that was requested from core */ | |
1207 | slot->__clk_old = clock; | |
f95f3850 WN |
1208 | } |
1209 | ||
fdf492a1 DA |
1210 | host->current_speed = clock; |
1211 | ||
f95f3850 | 1212 | /* Set the current slot bus width */ |
1d56c453 | 1213 | mci_writel(host, CTYPE, (slot->ctype << slot->id)); |
f95f3850 WN |
1214 | } |
1215 | ||
053b3ce6 SJ |
1216 | static void __dw_mci_start_request(struct dw_mci *host, |
1217 | struct dw_mci_slot *slot, | |
1218 | struct mmc_command *cmd) | |
f95f3850 WN |
1219 | { |
1220 | struct mmc_request *mrq; | |
f95f3850 WN |
1221 | struct mmc_data *data; |
1222 | u32 cmdflags; | |
1223 | ||
1224 | mrq = slot->mrq; | |
f95f3850 | 1225 | |
f95f3850 WN |
1226 | host->cur_slot = slot; |
1227 | host->mrq = mrq; | |
1228 | ||
1229 | host->pending_events = 0; | |
1230 | host->completed_events = 0; | |
e352c813 | 1231 | host->cmd_status = 0; |
f95f3850 | 1232 | host->data_status = 0; |
e352c813 | 1233 | host->dir_status = 0; |
f95f3850 | 1234 | |
053b3ce6 | 1235 | data = cmd->data; |
f95f3850 | 1236 | if (data) { |
f16afa88 | 1237 | mci_writel(host, TMOUT, 0xFFFFFFFF); |
f95f3850 WN |
1238 | mci_writel(host, BYTCNT, data->blksz*data->blocks); |
1239 | mci_writel(host, BLKSIZ, data->blksz); | |
1240 | } | |
1241 | ||
f95f3850 WN |
1242 | cmdflags = dw_mci_prepare_command(slot->mmc, cmd); |
1243 | ||
1244 | /* this is the first command, send the initialization clock */ | |
1245 | if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) | |
1246 | cmdflags |= SDMMC_CMD_INIT; | |
1247 | ||
1248 | if (data) { | |
1249 | dw_mci_submit_data(host, data); | |
0e3a22c0 | 1250 | wmb(); /* drain writebuffer */ |
f95f3850 WN |
1251 | } |
1252 | ||
1253 | dw_mci_start_command(host, cmd, cmdflags); | |
1254 | ||
5c935165 | 1255 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
49ba0302 DA |
1256 | unsigned long irqflags; |
1257 | ||
5c935165 | 1258 | /* |
8886a6fd DA |
1259 | * Databook says to fail after 2ms w/ no response, but evidence |
1260 | * shows that sometimes the cmd11 interrupt takes over 130ms. | |
1261 | * We'll set to 500ms, plus an extra jiffy just in case jiffies | |
1262 | * is just about to roll over. | |
49ba0302 DA |
1263 | * |
1264 | * We do this whole thing under spinlock and only if the | |
1265 | * command hasn't already completed (indicating the the irq | |
1266 | * already ran so we don't want the timeout). | |
5c935165 | 1267 | */ |
49ba0302 DA |
1268 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1269 | if (!test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) | |
1270 | mod_timer(&host->cmd11_timer, | |
1271 | jiffies + msecs_to_jiffies(500) + 1); | |
1272 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
5c935165 DA |
1273 | } |
1274 | ||
f95f3850 WN |
1275 | if (mrq->stop) |
1276 | host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); | |
90c2143a SJ |
1277 | else |
1278 | host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); | |
f95f3850 WN |
1279 | } |
1280 | ||
053b3ce6 SJ |
1281 | static void dw_mci_start_request(struct dw_mci *host, |
1282 | struct dw_mci_slot *slot) | |
1283 | { | |
1284 | struct mmc_request *mrq = slot->mrq; | |
1285 | struct mmc_command *cmd; | |
1286 | ||
1287 | cmd = mrq->sbc ? mrq->sbc : mrq->cmd; | |
1288 | __dw_mci_start_request(host, slot, cmd); | |
1289 | } | |
1290 | ||
7456caae | 1291 | /* must be called with host->lock held */ |
f95f3850 WN |
1292 | static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, |
1293 | struct mmc_request *mrq) | |
1294 | { | |
1295 | dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", | |
1296 | host->state); | |
1297 | ||
f95f3850 WN |
1298 | slot->mrq = mrq; |
1299 | ||
01730558 DA |
1300 | if (host->state == STATE_WAITING_CMD11_DONE) { |
1301 | dev_warn(&slot->mmc->class_dev, | |
1302 | "Voltage change didn't complete\n"); | |
1303 | /* | |
1304 | * this case isn't expected to happen, so we can | |
1305 | * either crash here or just try to continue on | |
1306 | * in the closest possible state | |
1307 | */ | |
1308 | host->state = STATE_IDLE; | |
1309 | } | |
1310 | ||
f95f3850 WN |
1311 | if (host->state == STATE_IDLE) { |
1312 | host->state = STATE_SENDING_CMD; | |
1313 | dw_mci_start_request(host, slot); | |
1314 | } else { | |
1315 | list_add_tail(&slot->queue_node, &host->queue); | |
1316 | } | |
f95f3850 WN |
1317 | } |
1318 | ||
1319 | static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1320 | { | |
1321 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1322 | struct dw_mci *host = slot->host; | |
1323 | ||
1324 | WARN_ON(slot->mrq); | |
1325 | ||
7456caae JH |
1326 | /* |
1327 | * The check for card presence and queueing of the request must be | |
1328 | * atomic, otherwise the card could be removed in between and the | |
1329 | * request wouldn't fail until another card was inserted. | |
1330 | */ | |
7456caae | 1331 | |
56f6911c | 1332 | if (!dw_mci_get_cd(mmc)) { |
f95f3850 WN |
1333 | mrq->cmd->error = -ENOMEDIUM; |
1334 | mmc_request_done(mmc, mrq); | |
1335 | return; | |
1336 | } | |
1337 | ||
56f6911c SL |
1338 | spin_lock_bh(&host->lock); |
1339 | ||
f95f3850 | 1340 | dw_mci_queue_request(host, slot, mrq); |
7456caae JH |
1341 | |
1342 | spin_unlock_bh(&host->lock); | |
f95f3850 WN |
1343 | } |
1344 | ||
1345 | static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1346 | { | |
1347 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
e95baf13 | 1348 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
41babf75 | 1349 | u32 regs; |
51da2240 | 1350 | int ret; |
f95f3850 | 1351 | |
f95f3850 | 1352 | switch (ios->bus_width) { |
f95f3850 WN |
1353 | case MMC_BUS_WIDTH_4: |
1354 | slot->ctype = SDMMC_CTYPE_4BIT; | |
1355 | break; | |
c9b2a06f JC |
1356 | case MMC_BUS_WIDTH_8: |
1357 | slot->ctype = SDMMC_CTYPE_8BIT; | |
1358 | break; | |
b2f7cb45 JC |
1359 | default: |
1360 | /* set default 1 bit mode */ | |
1361 | slot->ctype = SDMMC_CTYPE_1BIT; | |
f95f3850 WN |
1362 | } |
1363 | ||
3f514291 SJ |
1364 | regs = mci_readl(slot->host, UHS_REG); |
1365 | ||
41babf75 | 1366 | /* DDR mode set */ |
80113132 | 1367 | if (ios->timing == MMC_TIMING_MMC_DDR52 || |
7cc8d580 | 1368 | ios->timing == MMC_TIMING_UHS_DDR50 || |
80113132 | 1369 | ios->timing == MMC_TIMING_MMC_HS400) |
c69042a5 | 1370 | regs |= ((0x1 << slot->id) << 16); |
3f514291 | 1371 | else |
c69042a5 | 1372 | regs &= ~((0x1 << slot->id) << 16); |
3f514291 SJ |
1373 | |
1374 | mci_writel(slot->host, UHS_REG, regs); | |
f1d2736c | 1375 | slot->host->timing = ios->timing; |
41babf75 | 1376 | |
fdf492a1 DA |
1377 | /* |
1378 | * Use mirror of ios->clock to prevent race with mmc | |
1379 | * core ios update when finding the minimum. | |
1380 | */ | |
1381 | slot->clock = ios->clock; | |
f95f3850 | 1382 | |
cb27a843 JH |
1383 | if (drv_data && drv_data->set_ios) |
1384 | drv_data->set_ios(slot->host, ios); | |
800d78bf | 1385 | |
f95f3850 WN |
1386 | switch (ios->power_mode) { |
1387 | case MMC_POWER_UP: | |
51da2240 YC |
1388 | if (!IS_ERR(mmc->supply.vmmc)) { |
1389 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, | |
1390 | ios->vdd); | |
1391 | if (ret) { | |
1392 | dev_err(slot->host->dev, | |
1393 | "failed to enable vmmc regulator\n"); | |
1394 | /*return, if failed turn on vmmc*/ | |
1395 | return; | |
1396 | } | |
1397 | } | |
29d0d161 DA |
1398 | set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); |
1399 | regs = mci_readl(slot->host, PWREN); | |
1400 | regs |= (1 << slot->id); | |
1401 | mci_writel(slot->host, PWREN, regs); | |
1402 | break; | |
1403 | case MMC_POWER_ON: | |
d1f1dd86 DA |
1404 | if (!slot->host->vqmmc_enabled) { |
1405 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
1406 | ret = regulator_enable(mmc->supply.vqmmc); | |
1407 | if (ret < 0) | |
1408 | dev_err(slot->host->dev, | |
1409 | "failed to enable vqmmc\n"); | |
1410 | else | |
1411 | slot->host->vqmmc_enabled = true; | |
1412 | ||
1413 | } else { | |
1414 | /* Keep track so we don't reset again */ | |
51da2240 | 1415 | slot->host->vqmmc_enabled = true; |
d1f1dd86 DA |
1416 | } |
1417 | ||
1418 | /* Reset our state machine after powering on */ | |
1419 | dw_mci_ctrl_reset(slot->host, | |
1420 | SDMMC_CTRL_ALL_RESET_FLAGS); | |
51da2240 | 1421 | } |
655babbd DA |
1422 | |
1423 | /* Adjust clock / bus width after power is up */ | |
1424 | dw_mci_setup_bus(slot, false); | |
1425 | ||
e6f34e2f JH |
1426 | break; |
1427 | case MMC_POWER_OFF: | |
655babbd DA |
1428 | /* Turn clock off before power goes down */ |
1429 | dw_mci_setup_bus(slot, false); | |
1430 | ||
51da2240 YC |
1431 | if (!IS_ERR(mmc->supply.vmmc)) |
1432 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
1433 | ||
d1f1dd86 | 1434 | if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) |
51da2240 | 1435 | regulator_disable(mmc->supply.vqmmc); |
d1f1dd86 | 1436 | slot->host->vqmmc_enabled = false; |
51da2240 | 1437 | |
4366dcc5 JC |
1438 | regs = mci_readl(slot->host, PWREN); |
1439 | regs &= ~(1 << slot->id); | |
1440 | mci_writel(slot->host, PWREN, regs); | |
f95f3850 WN |
1441 | break; |
1442 | default: | |
1443 | break; | |
1444 | } | |
655babbd DA |
1445 | |
1446 | if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) | |
1447 | slot->host->state = STATE_IDLE; | |
f95f3850 WN |
1448 | } |
1449 | ||
01730558 DA |
1450 | static int dw_mci_card_busy(struct mmc_host *mmc) |
1451 | { | |
1452 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1453 | u32 status; | |
1454 | ||
1455 | /* | |
1456 | * Check the busy bit which is low when DAT[3:0] | |
1457 | * (the data lines) are 0000 | |
1458 | */ | |
1459 | status = mci_readl(slot->host, STATUS); | |
1460 | ||
1461 | return !!(status & SDMMC_STATUS_BUSY); | |
1462 | } | |
1463 | ||
1464 | static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) | |
1465 | { | |
1466 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1467 | struct dw_mci *host = slot->host; | |
8f7849c4 | 1468 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
01730558 DA |
1469 | u32 uhs; |
1470 | u32 v18 = SDMMC_UHS_18V << slot->id; | |
01730558 DA |
1471 | int ret; |
1472 | ||
8f7849c4 ZG |
1473 | if (drv_data && drv_data->switch_voltage) |
1474 | return drv_data->switch_voltage(mmc, ios); | |
1475 | ||
01730558 DA |
1476 | /* |
1477 | * Program the voltage. Note that some instances of dw_mmc may use | |
1478 | * the UHS_REG for this. For other instances (like exynos) the UHS_REG | |
1479 | * does no harm but you need to set the regulator directly. Try both. | |
1480 | */ | |
1481 | uhs = mci_readl(host, UHS_REG); | |
e0848f5d | 1482 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
01730558 | 1483 | uhs &= ~v18; |
e0848f5d | 1484 | else |
01730558 | 1485 | uhs |= v18; |
e0848f5d | 1486 | |
01730558 | 1487 | if (!IS_ERR(mmc->supply.vqmmc)) { |
e0848f5d | 1488 | ret = mmc_regulator_set_vqmmc(mmc, ios); |
01730558 DA |
1489 | |
1490 | if (ret) { | |
b19caf37 | 1491 | dev_dbg(&mmc->class_dev, |
e0848f5d DA |
1492 | "Regulator set error %d - %s V\n", |
1493 | ret, uhs & v18 ? "1.8" : "3.3"); | |
01730558 DA |
1494 | return ret; |
1495 | } | |
1496 | } | |
1497 | mci_writel(host, UHS_REG, uhs); | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
f95f3850 WN |
1502 | static int dw_mci_get_ro(struct mmc_host *mmc) |
1503 | { | |
1504 | int read_only; | |
1505 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
9795a846 | 1506 | int gpio_ro = mmc_gpio_get_ro(mmc); |
f95f3850 WN |
1507 | |
1508 | /* Use platform get_ro function, else try on board write protect */ | |
287980e4 | 1509 | if (gpio_ro >= 0) |
9795a846 | 1510 | read_only = gpio_ro; |
f95f3850 WN |
1511 | else |
1512 | read_only = | |
1513 | mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; | |
1514 | ||
1515 | dev_dbg(&mmc->class_dev, "card is %s\n", | |
1516 | read_only ? "read-only" : "read-write"); | |
1517 | ||
1518 | return read_only; | |
1519 | } | |
1520 | ||
1521 | static int dw_mci_get_cd(struct mmc_host *mmc) | |
1522 | { | |
1523 | int present; | |
1524 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
7cf347bd ZG |
1525 | struct dw_mci *host = slot->host; |
1526 | int gpio_cd = mmc_gpio_get_cd(mmc); | |
f95f3850 WN |
1527 | |
1528 | /* Use platform get_cd function, else try onboard card detect */ | |
860951c5 | 1529 | if ((mmc->caps & MMC_CAP_NEEDS_POLL) || !mmc_card_is_removable(mmc)) |
fc3d7720 | 1530 | present = 1; |
287980e4 | 1531 | else if (gpio_cd >= 0) |
7cf347bd | 1532 | present = gpio_cd; |
f95f3850 WN |
1533 | else |
1534 | present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) | |
1535 | == 0 ? 1 : 0; | |
1536 | ||
7cf347bd | 1537 | spin_lock_bh(&host->lock); |
bf626e55 ZG |
1538 | if (present) { |
1539 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1540 | dev_dbg(&mmc->class_dev, "card is present\n"); |
bf626e55 ZG |
1541 | } else { |
1542 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1543 | dev_dbg(&mmc->class_dev, "card is not present\n"); |
bf626e55 | 1544 | } |
7cf347bd | 1545 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
1546 | |
1547 | return present; | |
1548 | } | |
1549 | ||
935a665e SL |
1550 | static void dw_mci_hw_reset(struct mmc_host *mmc) |
1551 | { | |
1552 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1553 | struct dw_mci *host = slot->host; | |
1554 | int reset; | |
1555 | ||
1556 | if (host->use_dma == TRANS_MODE_IDMAC) | |
1557 | dw_mci_idmac_reset(host); | |
1558 | ||
1559 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET | | |
1560 | SDMMC_CTRL_FIFO_RESET)) | |
1561 | return; | |
1562 | ||
1563 | /* | |
1564 | * According to eMMC spec, card reset procedure: | |
1565 | * tRstW >= 1us: RST_n pulse width | |
1566 | * tRSCA >= 200us: RST_n to Command time | |
1567 | * tRSTH >= 1us: RST_n high period | |
1568 | */ | |
1569 | reset = mci_readl(host, RST_N); | |
1570 | reset &= ~(SDMMC_RST_HWACTIVE << slot->id); | |
1571 | mci_writel(host, RST_N, reset); | |
1572 | usleep_range(1, 2); | |
1573 | reset |= SDMMC_RST_HWACTIVE << slot->id; | |
1574 | mci_writel(host, RST_N, reset); | |
1575 | usleep_range(200, 300); | |
1576 | } | |
1577 | ||
b24c8b26 | 1578 | static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card) |
9623b5b9 | 1579 | { |
b24c8b26 | 1580 | struct dw_mci_slot *slot = mmc_priv(mmc); |
9623b5b9 | 1581 | struct dw_mci *host = slot->host; |
9623b5b9 | 1582 | |
b24c8b26 DA |
1583 | /* |
1584 | * Low power mode will stop the card clock when idle. According to the | |
1585 | * description of the CLKENA register we should disable low power mode | |
1586 | * for SDIO cards if we need SDIO interrupts to work. | |
1587 | */ | |
1588 | if (mmc->caps & MMC_CAP_SDIO_IRQ) { | |
1589 | const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; | |
1590 | u32 clk_en_a_old; | |
1591 | u32 clk_en_a; | |
9623b5b9 | 1592 | |
b24c8b26 DA |
1593 | clk_en_a_old = mci_readl(host, CLKENA); |
1594 | ||
1595 | if (card->type == MMC_TYPE_SDIO || | |
1596 | card->type == MMC_TYPE_SD_COMBO) { | |
1597 | set_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); | |
1598 | clk_en_a = clk_en_a_old & ~clken_low_pwr; | |
1599 | } else { | |
1600 | clear_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); | |
1601 | clk_en_a = clk_en_a_old | clken_low_pwr; | |
1602 | } | |
1603 | ||
1604 | if (clk_en_a != clk_en_a_old) { | |
1605 | mci_writel(host, CLKENA, clk_en_a); | |
1606 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
1607 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
1608 | } | |
9623b5b9 DA |
1609 | } |
1610 | } | |
1611 | ||
1a5c8e1f SH |
1612 | static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) |
1613 | { | |
1614 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1615 | struct dw_mci *host = slot->host; | |
f8c58c11 | 1616 | unsigned long irqflags; |
1a5c8e1f SH |
1617 | u32 int_mask; |
1618 | ||
f8c58c11 DA |
1619 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1620 | ||
1a5c8e1f SH |
1621 | /* Enable/disable Slot Specific SDIO interrupt */ |
1622 | int_mask = mci_readl(host, INTMASK); | |
b24c8b26 DA |
1623 | if (enb) |
1624 | int_mask |= SDMMC_INT_SDIO(slot->sdio_id); | |
1625 | else | |
1626 | int_mask &= ~SDMMC_INT_SDIO(slot->sdio_id); | |
1627 | mci_writel(host, INTMASK, int_mask); | |
f8c58c11 DA |
1628 | |
1629 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
1a5c8e1f SH |
1630 | } |
1631 | ||
0976f16d SJ |
1632 | static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
1633 | { | |
1634 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1635 | struct dw_mci *host = slot->host; | |
1636 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
0e3a22c0 | 1637 | int err = -EINVAL; |
0976f16d | 1638 | |
0976f16d | 1639 | if (drv_data && drv_data->execute_tuning) |
9979dbe5 | 1640 | err = drv_data->execute_tuning(slot, opcode); |
0976f16d SJ |
1641 | return err; |
1642 | } | |
1643 | ||
0e3a22c0 SL |
1644 | static int dw_mci_prepare_hs400_tuning(struct mmc_host *mmc, |
1645 | struct mmc_ios *ios) | |
80113132 SJ |
1646 | { |
1647 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1648 | struct dw_mci *host = slot->host; | |
1649 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
1650 | ||
1651 | if (drv_data && drv_data->prepare_hs400_tuning) | |
1652 | return drv_data->prepare_hs400_tuning(host, ios); | |
1653 | ||
1654 | return 0; | |
1655 | } | |
1656 | ||
f95f3850 | 1657 | static const struct mmc_host_ops dw_mci_ops = { |
1a5c8e1f | 1658 | .request = dw_mci_request, |
9aa51408 SJ |
1659 | .pre_req = dw_mci_pre_req, |
1660 | .post_req = dw_mci_post_req, | |
1a5c8e1f SH |
1661 | .set_ios = dw_mci_set_ios, |
1662 | .get_ro = dw_mci_get_ro, | |
1663 | .get_cd = dw_mci_get_cd, | |
935a665e | 1664 | .hw_reset = dw_mci_hw_reset, |
1a5c8e1f | 1665 | .enable_sdio_irq = dw_mci_enable_sdio_irq, |
0976f16d | 1666 | .execute_tuning = dw_mci_execute_tuning, |
01730558 DA |
1667 | .card_busy = dw_mci_card_busy, |
1668 | .start_signal_voltage_switch = dw_mci_switch_voltage, | |
b24c8b26 | 1669 | .init_card = dw_mci_init_card, |
80113132 | 1670 | .prepare_hs400_tuning = dw_mci_prepare_hs400_tuning, |
f95f3850 WN |
1671 | }; |
1672 | ||
1673 | static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) | |
1674 | __releases(&host->lock) | |
1675 | __acquires(&host->lock) | |
1676 | { | |
1677 | struct dw_mci_slot *slot; | |
1678 | struct mmc_host *prev_mmc = host->cur_slot->mmc; | |
1679 | ||
1680 | WARN_ON(host->cmd || host->data); | |
1681 | ||
1682 | host->cur_slot->mrq = NULL; | |
1683 | host->mrq = NULL; | |
1684 | if (!list_empty(&host->queue)) { | |
1685 | slot = list_entry(host->queue.next, | |
1686 | struct dw_mci_slot, queue_node); | |
1687 | list_del(&slot->queue_node); | |
4a90920c | 1688 | dev_vdbg(host->dev, "list not empty: %s is next\n", |
f95f3850 WN |
1689 | mmc_hostname(slot->mmc)); |
1690 | host->state = STATE_SENDING_CMD; | |
1691 | dw_mci_start_request(host, slot); | |
1692 | } else { | |
4a90920c | 1693 | dev_vdbg(host->dev, "list empty\n"); |
01730558 DA |
1694 | |
1695 | if (host->state == STATE_SENDING_CMD11) | |
1696 | host->state = STATE_WAITING_CMD11_DONE; | |
1697 | else | |
1698 | host->state = STATE_IDLE; | |
f95f3850 WN |
1699 | } |
1700 | ||
1701 | spin_unlock(&host->lock); | |
1702 | mmc_request_done(prev_mmc, mrq); | |
1703 | spin_lock(&host->lock); | |
1704 | } | |
1705 | ||
e352c813 | 1706 | static int dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) |
f95f3850 WN |
1707 | { |
1708 | u32 status = host->cmd_status; | |
1709 | ||
1710 | host->cmd_status = 0; | |
1711 | ||
1712 | /* Read the response from the card (up to 16 bytes) */ | |
1713 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1714 | if (cmd->flags & MMC_RSP_136) { | |
1715 | cmd->resp[3] = mci_readl(host, RESP0); | |
1716 | cmd->resp[2] = mci_readl(host, RESP1); | |
1717 | cmd->resp[1] = mci_readl(host, RESP2); | |
1718 | cmd->resp[0] = mci_readl(host, RESP3); | |
1719 | } else { | |
1720 | cmd->resp[0] = mci_readl(host, RESP0); | |
1721 | cmd->resp[1] = 0; | |
1722 | cmd->resp[2] = 0; | |
1723 | cmd->resp[3] = 0; | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | if (status & SDMMC_INT_RTO) | |
1728 | cmd->error = -ETIMEDOUT; | |
1729 | else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) | |
1730 | cmd->error = -EILSEQ; | |
1731 | else if (status & SDMMC_INT_RESP_ERR) | |
1732 | cmd->error = -EIO; | |
1733 | else | |
1734 | cmd->error = 0; | |
1735 | ||
e352c813 SJ |
1736 | return cmd->error; |
1737 | } | |
1738 | ||
1739 | static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) | |
1740 | { | |
31bff450 | 1741 | u32 status = host->data_status; |
e352c813 SJ |
1742 | |
1743 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1744 | if (status & SDMMC_INT_DRTO) { | |
1745 | data->error = -ETIMEDOUT; | |
1746 | } else if (status & SDMMC_INT_DCRC) { | |
1747 | data->error = -EILSEQ; | |
1748 | } else if (status & SDMMC_INT_EBE) { | |
1749 | if (host->dir_status == | |
1750 | DW_MCI_SEND_STATUS) { | |
1751 | /* | |
1752 | * No data CRC status was returned. | |
1753 | * The number of bytes transferred | |
1754 | * will be exaggerated in PIO mode. | |
1755 | */ | |
1756 | data->bytes_xfered = 0; | |
1757 | data->error = -ETIMEDOUT; | |
1758 | } else if (host->dir_status == | |
1759 | DW_MCI_RECV_STATUS) { | |
e7a1dec1 | 1760 | data->error = -EILSEQ; |
e352c813 SJ |
1761 | } |
1762 | } else { | |
1763 | /* SDMMC_INT_SBE is included */ | |
e7a1dec1 | 1764 | data->error = -EILSEQ; |
e352c813 SJ |
1765 | } |
1766 | ||
e6cc0123 | 1767 | dev_dbg(host->dev, "data error, status 0x%08x\n", status); |
e352c813 SJ |
1768 | |
1769 | /* | |
1770 | * After an error, there may be data lingering | |
31bff450 | 1771 | * in the FIFO |
e352c813 | 1772 | */ |
3a33a94c | 1773 | dw_mci_reset(host); |
e352c813 SJ |
1774 | } else { |
1775 | data->bytes_xfered = data->blocks * data->blksz; | |
1776 | data->error = 0; | |
1777 | } | |
1778 | ||
1779 | return data->error; | |
f95f3850 WN |
1780 | } |
1781 | ||
57e10486 AK |
1782 | static void dw_mci_set_drto(struct dw_mci *host) |
1783 | { | |
1784 | unsigned int drto_clks; | |
1785 | unsigned int drto_ms; | |
1786 | ||
1787 | drto_clks = mci_readl(host, TMOUT) >> 8; | |
1788 | drto_ms = DIV_ROUND_UP(drto_clks, host->bus_hz / 1000); | |
1789 | ||
1790 | /* add a bit spare time */ | |
1791 | drto_ms += 10; | |
1792 | ||
1793 | mod_timer(&host->dto_timer, jiffies + msecs_to_jiffies(drto_ms)); | |
1794 | } | |
1795 | ||
f95f3850 WN |
1796 | static void dw_mci_tasklet_func(unsigned long priv) |
1797 | { | |
1798 | struct dw_mci *host = (struct dw_mci *)priv; | |
1799 | struct mmc_data *data; | |
1800 | struct mmc_command *cmd; | |
e352c813 | 1801 | struct mmc_request *mrq; |
f95f3850 WN |
1802 | enum dw_mci_state state; |
1803 | enum dw_mci_state prev_state; | |
e352c813 | 1804 | unsigned int err; |
f95f3850 WN |
1805 | |
1806 | spin_lock(&host->lock); | |
1807 | ||
1808 | state = host->state; | |
1809 | data = host->data; | |
e352c813 | 1810 | mrq = host->mrq; |
f95f3850 WN |
1811 | |
1812 | do { | |
1813 | prev_state = state; | |
1814 | ||
1815 | switch (state) { | |
1816 | case STATE_IDLE: | |
01730558 | 1817 | case STATE_WAITING_CMD11_DONE: |
f95f3850 WN |
1818 | break; |
1819 | ||
01730558 | 1820 | case STATE_SENDING_CMD11: |
f95f3850 WN |
1821 | case STATE_SENDING_CMD: |
1822 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1823 | &host->pending_events)) | |
1824 | break; | |
1825 | ||
1826 | cmd = host->cmd; | |
1827 | host->cmd = NULL; | |
1828 | set_bit(EVENT_CMD_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1829 | err = dw_mci_command_complete(host, cmd); |
1830 | if (cmd == mrq->sbc && !err) { | |
053b3ce6 SJ |
1831 | prev_state = state = STATE_SENDING_CMD; |
1832 | __dw_mci_start_request(host, host->cur_slot, | |
e352c813 | 1833 | mrq->cmd); |
053b3ce6 SJ |
1834 | goto unlock; |
1835 | } | |
1836 | ||
e352c813 | 1837 | if (cmd->data && err) { |
46d17952 DA |
1838 | /* |
1839 | * During UHS tuning sequence, sending the stop | |
1840 | * command after the response CRC error would | |
1841 | * throw the system into a confused state | |
1842 | * causing all future tuning phases to report | |
1843 | * failure. | |
1844 | * | |
1845 | * In such case controller will move into a data | |
1846 | * transfer state after a response error or | |
1847 | * response CRC error. Let's let that finish | |
1848 | * before trying to send a stop, so we'll go to | |
1849 | * STATE_SENDING_DATA. | |
1850 | * | |
1851 | * Although letting the data transfer take place | |
1852 | * will waste a bit of time (we already know | |
1853 | * the command was bad), it can't cause any | |
1854 | * errors since it's possible it would have | |
1855 | * taken place anyway if this tasklet got | |
1856 | * delayed. Allowing the transfer to take place | |
1857 | * avoids races and keeps things simple. | |
1858 | */ | |
1859 | if ((err != -ETIMEDOUT) && | |
1860 | (cmd->opcode == MMC_SEND_TUNING_BLOCK)) { | |
1861 | state = STATE_SENDING_DATA; | |
1862 | continue; | |
1863 | } | |
1864 | ||
71abb133 | 1865 | dw_mci_stop_dma(host); |
90c2143a SJ |
1866 | send_stop_abort(host, data); |
1867 | state = STATE_SENDING_STOP; | |
1868 | break; | |
71abb133 SJ |
1869 | } |
1870 | ||
e352c813 SJ |
1871 | if (!cmd->data || err) { |
1872 | dw_mci_request_end(host, mrq); | |
f95f3850 WN |
1873 | goto unlock; |
1874 | } | |
1875 | ||
1876 | prev_state = state = STATE_SENDING_DATA; | |
1877 | /* fall through */ | |
1878 | ||
1879 | case STATE_SENDING_DATA: | |
2aa35465 DA |
1880 | /* |
1881 | * We could get a data error and never a transfer | |
1882 | * complete so we'd better check for it here. | |
1883 | * | |
1884 | * Note that we don't really care if we also got a | |
1885 | * transfer complete; stopping the DMA and sending an | |
1886 | * abort won't hurt. | |
1887 | */ | |
f95f3850 WN |
1888 | if (test_and_clear_bit(EVENT_DATA_ERROR, |
1889 | &host->pending_events)) { | |
1890 | dw_mci_stop_dma(host); | |
bdb9a90b | 1891 | if (data->stop || |
1892 | !(host->data_status & (SDMMC_INT_DRTO | | |
1893 | SDMMC_INT_EBE))) | |
1894 | send_stop_abort(host, data); | |
f95f3850 WN |
1895 | state = STATE_DATA_ERROR; |
1896 | break; | |
1897 | } | |
1898 | ||
1899 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
57e10486 AK |
1900 | &host->pending_events)) { |
1901 | /* | |
1902 | * If all data-related interrupts don't come | |
1903 | * within the given time in reading data state. | |
1904 | */ | |
16a34574 | 1905 | if (host->dir_status == DW_MCI_RECV_STATUS) |
57e10486 | 1906 | dw_mci_set_drto(host); |
f95f3850 | 1907 | break; |
57e10486 | 1908 | } |
f95f3850 WN |
1909 | |
1910 | set_bit(EVENT_XFER_COMPLETE, &host->completed_events); | |
2aa35465 DA |
1911 | |
1912 | /* | |
1913 | * Handle an EVENT_DATA_ERROR that might have shown up | |
1914 | * before the transfer completed. This might not have | |
1915 | * been caught by the check above because the interrupt | |
1916 | * could have gone off between the previous check and | |
1917 | * the check for transfer complete. | |
1918 | * | |
1919 | * Technically this ought not be needed assuming we | |
1920 | * get a DATA_COMPLETE eventually (we'll notice the | |
1921 | * error and end the request), but it shouldn't hurt. | |
1922 | * | |
1923 | * This has the advantage of sending the stop command. | |
1924 | */ | |
1925 | if (test_and_clear_bit(EVENT_DATA_ERROR, | |
1926 | &host->pending_events)) { | |
1927 | dw_mci_stop_dma(host); | |
bdb9a90b | 1928 | if (data->stop || |
1929 | !(host->data_status & (SDMMC_INT_DRTO | | |
1930 | SDMMC_INT_EBE))) | |
1931 | send_stop_abort(host, data); | |
2aa35465 DA |
1932 | state = STATE_DATA_ERROR; |
1933 | break; | |
1934 | } | |
f95f3850 | 1935 | prev_state = state = STATE_DATA_BUSY; |
2aa35465 | 1936 | |
f95f3850 WN |
1937 | /* fall through */ |
1938 | ||
1939 | case STATE_DATA_BUSY: | |
1940 | if (!test_and_clear_bit(EVENT_DATA_COMPLETE, | |
57e10486 AK |
1941 | &host->pending_events)) { |
1942 | /* | |
1943 | * If data error interrupt comes but data over | |
1944 | * interrupt doesn't come within the given time. | |
1945 | * in reading data state. | |
1946 | */ | |
16a34574 | 1947 | if (host->dir_status == DW_MCI_RECV_STATUS) |
57e10486 | 1948 | dw_mci_set_drto(host); |
f95f3850 | 1949 | break; |
57e10486 | 1950 | } |
f95f3850 WN |
1951 | |
1952 | host->data = NULL; | |
1953 | set_bit(EVENT_DATA_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1954 | err = dw_mci_data_complete(host, data); |
1955 | ||
1956 | if (!err) { | |
1957 | if (!data->stop || mrq->sbc) { | |
17c8bc85 | 1958 | if (mrq->sbc && data->stop) |
e352c813 SJ |
1959 | data->stop->error = 0; |
1960 | dw_mci_request_end(host, mrq); | |
1961 | goto unlock; | |
f95f3850 | 1962 | } |
f95f3850 | 1963 | |
e352c813 SJ |
1964 | /* stop command for open-ended transfer*/ |
1965 | if (data->stop) | |
1966 | send_stop_abort(host, data); | |
2aa35465 DA |
1967 | } else { |
1968 | /* | |
1969 | * If we don't have a command complete now we'll | |
1970 | * never get one since we just reset everything; | |
1971 | * better end the request. | |
1972 | * | |
1973 | * If we do have a command complete we'll fall | |
1974 | * through to the SENDING_STOP command and | |
1975 | * everything will be peachy keen. | |
1976 | */ | |
1977 | if (!test_bit(EVENT_CMD_COMPLETE, | |
1978 | &host->pending_events)) { | |
1979 | host->cmd = NULL; | |
1980 | dw_mci_request_end(host, mrq); | |
1981 | goto unlock; | |
1982 | } | |
053b3ce6 SJ |
1983 | } |
1984 | ||
e352c813 SJ |
1985 | /* |
1986 | * If err has non-zero, | |
1987 | * stop-abort command has been already issued. | |
1988 | */ | |
f95f3850 | 1989 | prev_state = state = STATE_SENDING_STOP; |
e352c813 | 1990 | |
f95f3850 WN |
1991 | /* fall through */ |
1992 | ||
1993 | case STATE_SENDING_STOP: | |
1994 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1995 | &host->pending_events)) | |
1996 | break; | |
1997 | ||
71abb133 | 1998 | /* CMD error in data command */ |
31bff450 | 1999 | if (mrq->cmd->error && mrq->data) |
3a33a94c | 2000 | dw_mci_reset(host); |
71abb133 | 2001 | |
f95f3850 | 2002 | host->cmd = NULL; |
71abb133 | 2003 | host->data = NULL; |
90c2143a | 2004 | |
e352c813 SJ |
2005 | if (mrq->stop) |
2006 | dw_mci_command_complete(host, mrq->stop); | |
90c2143a SJ |
2007 | else |
2008 | host->cmd_status = 0; | |
2009 | ||
e352c813 | 2010 | dw_mci_request_end(host, mrq); |
f95f3850 WN |
2011 | goto unlock; |
2012 | ||
2013 | case STATE_DATA_ERROR: | |
2014 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
2015 | &host->pending_events)) | |
2016 | break; | |
2017 | ||
2018 | state = STATE_DATA_BUSY; | |
2019 | break; | |
2020 | } | |
2021 | } while (state != prev_state); | |
2022 | ||
2023 | host->state = state; | |
2024 | unlock: | |
2025 | spin_unlock(&host->lock); | |
2026 | ||
2027 | } | |
2028 | ||
34b664a2 JH |
2029 | /* push final bytes to part_buf, only use during push */ |
2030 | static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 2031 | { |
34b664a2 JH |
2032 | memcpy((void *)&host->part_buf, buf, cnt); |
2033 | host->part_buf_count = cnt; | |
2034 | } | |
f95f3850 | 2035 | |
34b664a2 JH |
2036 | /* append bytes to part_buf, only use during push */ |
2037 | static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
2038 | { | |
2039 | cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); | |
2040 | memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); | |
2041 | host->part_buf_count += cnt; | |
2042 | return cnt; | |
2043 | } | |
f95f3850 | 2044 | |
34b664a2 JH |
2045 | /* pull first bytes from part_buf, only use during pull */ |
2046 | static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
2047 | { | |
0e3a22c0 | 2048 | cnt = min_t(int, cnt, host->part_buf_count); |
34b664a2 JH |
2049 | if (cnt) { |
2050 | memcpy(buf, (void *)&host->part_buf + host->part_buf_start, | |
2051 | cnt); | |
2052 | host->part_buf_count -= cnt; | |
2053 | host->part_buf_start += cnt; | |
f95f3850 | 2054 | } |
34b664a2 | 2055 | return cnt; |
f95f3850 WN |
2056 | } |
2057 | ||
34b664a2 JH |
2058 | /* pull final bytes from the part_buf, assuming it's just been filled */ |
2059 | static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 2060 | { |
34b664a2 JH |
2061 | memcpy(buf, &host->part_buf, cnt); |
2062 | host->part_buf_start = cnt; | |
2063 | host->part_buf_count = (1 << host->data_shift) - cnt; | |
2064 | } | |
f95f3850 | 2065 | |
34b664a2 JH |
2066 | static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) |
2067 | { | |
cfbeb59c MC |
2068 | struct mmc_data *data = host->data; |
2069 | int init_cnt = cnt; | |
2070 | ||
34b664a2 JH |
2071 | /* try and push anything in the part_buf */ |
2072 | if (unlikely(host->part_buf_count)) { | |
2073 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2074 | |
34b664a2 JH |
2075 | buf += len; |
2076 | cnt -= len; | |
cfbeb59c | 2077 | if (host->part_buf_count == 2) { |
76184ac1 | 2078 | mci_fifo_writew(host->fifo_reg, host->part_buf16); |
34b664a2 JH |
2079 | host->part_buf_count = 0; |
2080 | } | |
2081 | } | |
2082 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2083 | if (unlikely((unsigned long)buf & 0x1)) { | |
2084 | while (cnt >= 2) { | |
2085 | u16 aligned_buf[64]; | |
2086 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
2087 | int items = len >> 1; | |
2088 | int i; | |
2089 | /* memcpy from input buffer into aligned buffer */ | |
2090 | memcpy(aligned_buf, buf, len); | |
2091 | buf += len; | |
2092 | cnt -= len; | |
2093 | /* push data from aligned buffer into fifo */ | |
2094 | for (i = 0; i < items; ++i) | |
76184ac1 | 2095 | mci_fifo_writew(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2096 | } |
2097 | } else | |
2098 | #endif | |
2099 | { | |
2100 | u16 *pdata = buf; | |
0e3a22c0 | 2101 | |
34b664a2 | 2102 | for (; cnt >= 2; cnt -= 2) |
76184ac1 | 2103 | mci_fifo_writew(host->fifo_reg, *pdata++); |
34b664a2 JH |
2104 | buf = pdata; |
2105 | } | |
2106 | /* put anything remaining in the part_buf */ | |
2107 | if (cnt) { | |
2108 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2109 | /* Push data if we have reached the expected data length */ |
2110 | if ((data->bytes_xfered + init_cnt) == | |
2111 | (data->blksz * data->blocks)) | |
76184ac1 | 2112 | mci_fifo_writew(host->fifo_reg, host->part_buf16); |
34b664a2 JH |
2113 | } |
2114 | } | |
f95f3850 | 2115 | |
34b664a2 JH |
2116 | static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) |
2117 | { | |
2118 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2119 | if (unlikely((unsigned long)buf & 0x1)) { | |
2120 | while (cnt >= 2) { | |
2121 | /* pull data from fifo into aligned buffer */ | |
2122 | u16 aligned_buf[64]; | |
2123 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
2124 | int items = len >> 1; | |
2125 | int i; | |
0e3a22c0 | 2126 | |
34b664a2 | 2127 | for (i = 0; i < items; ++i) |
76184ac1 | 2128 | aligned_buf[i] = mci_fifo_readw(host->fifo_reg); |
34b664a2 JH |
2129 | /* memcpy from aligned buffer into output buffer */ |
2130 | memcpy(buf, aligned_buf, len); | |
2131 | buf += len; | |
2132 | cnt -= len; | |
2133 | } | |
2134 | } else | |
2135 | #endif | |
2136 | { | |
2137 | u16 *pdata = buf; | |
0e3a22c0 | 2138 | |
34b664a2 | 2139 | for (; cnt >= 2; cnt -= 2) |
76184ac1 | 2140 | *pdata++ = mci_fifo_readw(host->fifo_reg); |
34b664a2 JH |
2141 | buf = pdata; |
2142 | } | |
2143 | if (cnt) { | |
76184ac1 | 2144 | host->part_buf16 = mci_fifo_readw(host->fifo_reg); |
34b664a2 | 2145 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
2146 | } |
2147 | } | |
2148 | ||
2149 | static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) | |
2150 | { | |
cfbeb59c MC |
2151 | struct mmc_data *data = host->data; |
2152 | int init_cnt = cnt; | |
2153 | ||
34b664a2 JH |
2154 | /* try and push anything in the part_buf */ |
2155 | if (unlikely(host->part_buf_count)) { | |
2156 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2157 | |
34b664a2 JH |
2158 | buf += len; |
2159 | cnt -= len; | |
cfbeb59c | 2160 | if (host->part_buf_count == 4) { |
76184ac1 | 2161 | mci_fifo_writel(host->fifo_reg, host->part_buf32); |
34b664a2 JH |
2162 | host->part_buf_count = 0; |
2163 | } | |
2164 | } | |
2165 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2166 | if (unlikely((unsigned long)buf & 0x3)) { | |
2167 | while (cnt >= 4) { | |
2168 | u32 aligned_buf[32]; | |
2169 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
2170 | int items = len >> 2; | |
2171 | int i; | |
2172 | /* memcpy from input buffer into aligned buffer */ | |
2173 | memcpy(aligned_buf, buf, len); | |
2174 | buf += len; | |
2175 | cnt -= len; | |
2176 | /* push data from aligned buffer into fifo */ | |
2177 | for (i = 0; i < items; ++i) | |
76184ac1 | 2178 | mci_fifo_writel(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2179 | } |
2180 | } else | |
2181 | #endif | |
2182 | { | |
2183 | u32 *pdata = buf; | |
0e3a22c0 | 2184 | |
34b664a2 | 2185 | for (; cnt >= 4; cnt -= 4) |
76184ac1 | 2186 | mci_fifo_writel(host->fifo_reg, *pdata++); |
34b664a2 JH |
2187 | buf = pdata; |
2188 | } | |
2189 | /* put anything remaining in the part_buf */ | |
2190 | if (cnt) { | |
2191 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2192 | /* Push data if we have reached the expected data length */ |
2193 | if ((data->bytes_xfered + init_cnt) == | |
2194 | (data->blksz * data->blocks)) | |
76184ac1 | 2195 | mci_fifo_writel(host->fifo_reg, host->part_buf32); |
f95f3850 WN |
2196 | } |
2197 | } | |
2198 | ||
2199 | static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) | |
2200 | { | |
34b664a2 JH |
2201 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
2202 | if (unlikely((unsigned long)buf & 0x3)) { | |
2203 | while (cnt >= 4) { | |
2204 | /* pull data from fifo into aligned buffer */ | |
2205 | u32 aligned_buf[32]; | |
2206 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
2207 | int items = len >> 2; | |
2208 | int i; | |
0e3a22c0 | 2209 | |
34b664a2 | 2210 | for (i = 0; i < items; ++i) |
76184ac1 | 2211 | aligned_buf[i] = mci_fifo_readl(host->fifo_reg); |
34b664a2 JH |
2212 | /* memcpy from aligned buffer into output buffer */ |
2213 | memcpy(buf, aligned_buf, len); | |
2214 | buf += len; | |
2215 | cnt -= len; | |
2216 | } | |
2217 | } else | |
2218 | #endif | |
2219 | { | |
2220 | u32 *pdata = buf; | |
0e3a22c0 | 2221 | |
34b664a2 | 2222 | for (; cnt >= 4; cnt -= 4) |
76184ac1 | 2223 | *pdata++ = mci_fifo_readl(host->fifo_reg); |
34b664a2 JH |
2224 | buf = pdata; |
2225 | } | |
2226 | if (cnt) { | |
76184ac1 | 2227 | host->part_buf32 = mci_fifo_readl(host->fifo_reg); |
34b664a2 | 2228 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
2229 | } |
2230 | } | |
2231 | ||
2232 | static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) | |
2233 | { | |
cfbeb59c MC |
2234 | struct mmc_data *data = host->data; |
2235 | int init_cnt = cnt; | |
2236 | ||
34b664a2 JH |
2237 | /* try and push anything in the part_buf */ |
2238 | if (unlikely(host->part_buf_count)) { | |
2239 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2240 | |
34b664a2 JH |
2241 | buf += len; |
2242 | cnt -= len; | |
c09fbd74 | 2243 | |
cfbeb59c | 2244 | if (host->part_buf_count == 8) { |
76184ac1 | 2245 | mci_fifo_writeq(host->fifo_reg, host->part_buf); |
34b664a2 JH |
2246 | host->part_buf_count = 0; |
2247 | } | |
2248 | } | |
2249 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2250 | if (unlikely((unsigned long)buf & 0x7)) { | |
2251 | while (cnt >= 8) { | |
2252 | u64 aligned_buf[16]; | |
2253 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
2254 | int items = len >> 3; | |
2255 | int i; | |
2256 | /* memcpy from input buffer into aligned buffer */ | |
2257 | memcpy(aligned_buf, buf, len); | |
2258 | buf += len; | |
2259 | cnt -= len; | |
2260 | /* push data from aligned buffer into fifo */ | |
2261 | for (i = 0; i < items; ++i) | |
76184ac1 | 2262 | mci_fifo_writeq(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2263 | } |
2264 | } else | |
2265 | #endif | |
2266 | { | |
2267 | u64 *pdata = buf; | |
0e3a22c0 | 2268 | |
34b664a2 | 2269 | for (; cnt >= 8; cnt -= 8) |
76184ac1 | 2270 | mci_fifo_writeq(host->fifo_reg, *pdata++); |
34b664a2 JH |
2271 | buf = pdata; |
2272 | } | |
2273 | /* put anything remaining in the part_buf */ | |
2274 | if (cnt) { | |
2275 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2276 | /* Push data if we have reached the expected data length */ |
2277 | if ((data->bytes_xfered + init_cnt) == | |
2278 | (data->blksz * data->blocks)) | |
76184ac1 | 2279 | mci_fifo_writeq(host->fifo_reg, host->part_buf); |
f95f3850 WN |
2280 | } |
2281 | } | |
2282 | ||
2283 | static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) | |
2284 | { | |
34b664a2 JH |
2285 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
2286 | if (unlikely((unsigned long)buf & 0x7)) { | |
2287 | while (cnt >= 8) { | |
2288 | /* pull data from fifo into aligned buffer */ | |
2289 | u64 aligned_buf[16]; | |
2290 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
2291 | int items = len >> 3; | |
2292 | int i; | |
0e3a22c0 | 2293 | |
34b664a2 | 2294 | for (i = 0; i < items; ++i) |
76184ac1 BD |
2295 | aligned_buf[i] = mci_fifo_readq(host->fifo_reg); |
2296 | ||
34b664a2 JH |
2297 | /* memcpy from aligned buffer into output buffer */ |
2298 | memcpy(buf, aligned_buf, len); | |
2299 | buf += len; | |
2300 | cnt -= len; | |
2301 | } | |
2302 | } else | |
2303 | #endif | |
2304 | { | |
2305 | u64 *pdata = buf; | |
0e3a22c0 | 2306 | |
34b664a2 | 2307 | for (; cnt >= 8; cnt -= 8) |
76184ac1 | 2308 | *pdata++ = mci_fifo_readq(host->fifo_reg); |
34b664a2 JH |
2309 | buf = pdata; |
2310 | } | |
2311 | if (cnt) { | |
76184ac1 | 2312 | host->part_buf = mci_fifo_readq(host->fifo_reg); |
34b664a2 JH |
2313 | dw_mci_pull_final_bytes(host, buf, cnt); |
2314 | } | |
2315 | } | |
f95f3850 | 2316 | |
34b664a2 JH |
2317 | static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) |
2318 | { | |
2319 | int len; | |
f95f3850 | 2320 | |
34b664a2 JH |
2321 | /* get remaining partial bytes */ |
2322 | len = dw_mci_pull_part_bytes(host, buf, cnt); | |
2323 | if (unlikely(len == cnt)) | |
2324 | return; | |
2325 | buf += len; | |
2326 | cnt -= len; | |
2327 | ||
2328 | /* get the rest of the data */ | |
2329 | host->pull_data(host, buf, cnt); | |
f95f3850 WN |
2330 | } |
2331 | ||
87a74d39 | 2332 | static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) |
f95f3850 | 2333 | { |
f9c2a0dc SJ |
2334 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2335 | void *buf; | |
2336 | unsigned int offset; | |
f95f3850 WN |
2337 | struct mmc_data *data = host->data; |
2338 | int shift = host->data_shift; | |
2339 | u32 status; | |
3e4b0d8b | 2340 | unsigned int len; |
f9c2a0dc | 2341 | unsigned int remain, fcnt; |
f95f3850 WN |
2342 | |
2343 | do { | |
f9c2a0dc SJ |
2344 | if (!sg_miter_next(sg_miter)) |
2345 | goto done; | |
2346 | ||
4225fc85 | 2347 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2348 | buf = sg_miter->addr; |
2349 | remain = sg_miter->length; | |
2350 | offset = 0; | |
2351 | ||
2352 | do { | |
2353 | fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) | |
2354 | << shift) + host->part_buf_count; | |
2355 | len = min(remain, fcnt); | |
2356 | if (!len) | |
2357 | break; | |
34b664a2 | 2358 | dw_mci_pull_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2359 | data->bytes_xfered += len; |
f95f3850 | 2360 | offset += len; |
f9c2a0dc SJ |
2361 | remain -= len; |
2362 | } while (remain); | |
f95f3850 | 2363 | |
e74f3a9c | 2364 | sg_miter->consumed = offset; |
f95f3850 WN |
2365 | status = mci_readl(host, MINTSTS); |
2366 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
87a74d39 KK |
2367 | /* if the RXDR is ready read again */ |
2368 | } while ((status & SDMMC_INT_RXDR) || | |
2369 | (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); | |
f9c2a0dc SJ |
2370 | |
2371 | if (!remain) { | |
2372 | if (!sg_miter_next(sg_miter)) | |
2373 | goto done; | |
2374 | sg_miter->consumed = 0; | |
2375 | } | |
2376 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2377 | return; |
2378 | ||
2379 | done: | |
f9c2a0dc SJ |
2380 | sg_miter_stop(sg_miter); |
2381 | host->sg = NULL; | |
0e3a22c0 | 2382 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2383 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); |
2384 | } | |
2385 | ||
2386 | static void dw_mci_write_data_pio(struct dw_mci *host) | |
2387 | { | |
f9c2a0dc SJ |
2388 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2389 | void *buf; | |
2390 | unsigned int offset; | |
f95f3850 WN |
2391 | struct mmc_data *data = host->data; |
2392 | int shift = host->data_shift; | |
2393 | u32 status; | |
3e4b0d8b | 2394 | unsigned int len; |
f9c2a0dc SJ |
2395 | unsigned int fifo_depth = host->fifo_depth; |
2396 | unsigned int remain, fcnt; | |
f95f3850 WN |
2397 | |
2398 | do { | |
f9c2a0dc SJ |
2399 | if (!sg_miter_next(sg_miter)) |
2400 | goto done; | |
2401 | ||
4225fc85 | 2402 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2403 | buf = sg_miter->addr; |
2404 | remain = sg_miter->length; | |
2405 | offset = 0; | |
2406 | ||
2407 | do { | |
2408 | fcnt = ((fifo_depth - | |
2409 | SDMMC_GET_FCNT(mci_readl(host, STATUS))) | |
2410 | << shift) - host->part_buf_count; | |
2411 | len = min(remain, fcnt); | |
2412 | if (!len) | |
2413 | break; | |
f95f3850 | 2414 | host->push_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2415 | data->bytes_xfered += len; |
f95f3850 | 2416 | offset += len; |
f9c2a0dc SJ |
2417 | remain -= len; |
2418 | } while (remain); | |
f95f3850 | 2419 | |
e74f3a9c | 2420 | sg_miter->consumed = offset; |
f95f3850 WN |
2421 | status = mci_readl(host, MINTSTS); |
2422 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
f95f3850 | 2423 | } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ |
f9c2a0dc SJ |
2424 | |
2425 | if (!remain) { | |
2426 | if (!sg_miter_next(sg_miter)) | |
2427 | goto done; | |
2428 | sg_miter->consumed = 0; | |
2429 | } | |
2430 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2431 | return; |
2432 | ||
2433 | done: | |
f9c2a0dc SJ |
2434 | sg_miter_stop(sg_miter); |
2435 | host->sg = NULL; | |
0e3a22c0 | 2436 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2437 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); |
2438 | } | |
2439 | ||
2440 | static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) | |
2441 | { | |
2442 | if (!host->cmd_status) | |
2443 | host->cmd_status = status; | |
2444 | ||
0e3a22c0 | 2445 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2446 | |
2447 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
2448 | tasklet_schedule(&host->tasklet); | |
2449 | } | |
2450 | ||
6130e7a9 DA |
2451 | static void dw_mci_handle_cd(struct dw_mci *host) |
2452 | { | |
2453 | int i; | |
2454 | ||
2455 | for (i = 0; i < host->num_slots; i++) { | |
2456 | struct dw_mci_slot *slot = host->slot[i]; | |
2457 | ||
2458 | if (!slot) | |
2459 | continue; | |
2460 | ||
2461 | if (slot->mmc->ops->card_event) | |
2462 | slot->mmc->ops->card_event(slot->mmc); | |
2463 | mmc_detect_change(slot->mmc, | |
2464 | msecs_to_jiffies(host->pdata->detect_delay_ms)); | |
2465 | } | |
2466 | } | |
2467 | ||
f95f3850 WN |
2468 | static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) |
2469 | { | |
2470 | struct dw_mci *host = dev_id; | |
182c9081 | 2471 | u32 pending; |
1a5c8e1f | 2472 | int i; |
f95f3850 | 2473 | |
1fb5f68a MC |
2474 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ |
2475 | ||
476d79f1 | 2476 | if (pending) { |
01730558 DA |
2477 | /* Check volt switch first, since it can look like an error */ |
2478 | if ((host->state == STATE_SENDING_CMD11) && | |
2479 | (pending & SDMMC_INT_VOLT_SWITCH)) { | |
49ba0302 | 2480 | unsigned long irqflags; |
5c935165 | 2481 | |
01730558 DA |
2482 | mci_writel(host, RINTSTS, SDMMC_INT_VOLT_SWITCH); |
2483 | pending &= ~SDMMC_INT_VOLT_SWITCH; | |
49ba0302 DA |
2484 | |
2485 | /* | |
2486 | * Hold the lock; we know cmd11_timer can't be kicked | |
2487 | * off after the lock is released, so safe to delete. | |
2488 | */ | |
2489 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
01730558 | 2490 | dw_mci_cmd_interrupt(host, pending); |
49ba0302 DA |
2491 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
2492 | ||
2493 | del_timer(&host->cmd11_timer); | |
01730558 DA |
2494 | } |
2495 | ||
f95f3850 WN |
2496 | if (pending & DW_MCI_CMD_ERROR_FLAGS) { |
2497 | mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); | |
182c9081 | 2498 | host->cmd_status = pending; |
0e3a22c0 | 2499 | smp_wmb(); /* drain writebuffer */ |
f95f3850 | 2500 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); |
f95f3850 WN |
2501 | } |
2502 | ||
2503 | if (pending & DW_MCI_DATA_ERROR_FLAGS) { | |
2504 | /* if there is an error report DATA_ERROR */ | |
2505 | mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); | |
182c9081 | 2506 | host->data_status = pending; |
0e3a22c0 | 2507 | smp_wmb(); /* drain writebuffer */ |
f95f3850 | 2508 | set_bit(EVENT_DATA_ERROR, &host->pending_events); |
9b2026a1 | 2509 | tasklet_schedule(&host->tasklet); |
f95f3850 WN |
2510 | } |
2511 | ||
2512 | if (pending & SDMMC_INT_DATA_OVER) { | |
16a34574 | 2513 | del_timer(&host->dto_timer); |
57e10486 | 2514 | |
f95f3850 WN |
2515 | mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); |
2516 | if (!host->data_status) | |
182c9081 | 2517 | host->data_status = pending; |
0e3a22c0 | 2518 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2519 | if (host->dir_status == DW_MCI_RECV_STATUS) { |
2520 | if (host->sg != NULL) | |
87a74d39 | 2521 | dw_mci_read_data_pio(host, true); |
f95f3850 WN |
2522 | } |
2523 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
2524 | tasklet_schedule(&host->tasklet); | |
2525 | } | |
2526 | ||
2527 | if (pending & SDMMC_INT_RXDR) { | |
2528 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
b40af3aa | 2529 | if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) |
87a74d39 | 2530 | dw_mci_read_data_pio(host, false); |
f95f3850 WN |
2531 | } |
2532 | ||
2533 | if (pending & SDMMC_INT_TXDR) { | |
2534 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
b40af3aa | 2535 | if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) |
f95f3850 WN |
2536 | dw_mci_write_data_pio(host); |
2537 | } | |
2538 | ||
2539 | if (pending & SDMMC_INT_CMD_DONE) { | |
2540 | mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); | |
182c9081 | 2541 | dw_mci_cmd_interrupt(host, pending); |
f95f3850 WN |
2542 | } |
2543 | ||
2544 | if (pending & SDMMC_INT_CD) { | |
2545 | mci_writel(host, RINTSTS, SDMMC_INT_CD); | |
6130e7a9 | 2546 | dw_mci_handle_cd(host); |
f95f3850 WN |
2547 | } |
2548 | ||
1a5c8e1f SH |
2549 | /* Handle SDIO Interrupts */ |
2550 | for (i = 0; i < host->num_slots; i++) { | |
2551 | struct dw_mci_slot *slot = host->slot[i]; | |
ed2540ef DA |
2552 | |
2553 | if (!slot) | |
2554 | continue; | |
2555 | ||
76756234 AK |
2556 | if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { |
2557 | mci_writel(host, RINTSTS, | |
2558 | SDMMC_INT_SDIO(slot->sdio_id)); | |
1a5c8e1f SH |
2559 | mmc_signal_sdio_irq(slot->mmc); |
2560 | } | |
2561 | } | |
2562 | ||
1fb5f68a | 2563 | } |
f95f3850 | 2564 | |
3fc7eaef SL |
2565 | if (host->use_dma != TRANS_MODE_IDMAC) |
2566 | return IRQ_HANDLED; | |
2567 | ||
2568 | /* Handle IDMA interrupts */ | |
69d99fdc PT |
2569 | if (host->dma_64bit_address == 1) { |
2570 | pending = mci_readl(host, IDSTS64); | |
2571 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2572 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_TI | | |
2573 | SDMMC_IDMAC_INT_RI); | |
2574 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_NI); | |
faecf411 SL |
2575 | if (!test_bit(EVENT_DATA_ERROR, &host->pending_events)) |
2576 | host->dma_ops->complete((void *)host); | |
69d99fdc PT |
2577 | } |
2578 | } else { | |
2579 | pending = mci_readl(host, IDSTS); | |
2580 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2581 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | | |
2582 | SDMMC_IDMAC_INT_RI); | |
2583 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); | |
faecf411 SL |
2584 | if (!test_bit(EVENT_DATA_ERROR, &host->pending_events)) |
2585 | host->dma_ops->complete((void *)host); | |
69d99fdc | 2586 | } |
f95f3850 | 2587 | } |
f95f3850 WN |
2588 | |
2589 | return IRQ_HANDLED; | |
2590 | } | |
2591 | ||
36c179a9 | 2592 | static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) |
f95f3850 WN |
2593 | { |
2594 | struct mmc_host *mmc; | |
2595 | struct dw_mci_slot *slot; | |
e95baf13 | 2596 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2597 | int ctrl_id, ret; |
1f44a2a5 | 2598 | u32 freq[2]; |
f95f3850 | 2599 | |
4a90920c | 2600 | mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); |
f95f3850 WN |
2601 | if (!mmc) |
2602 | return -ENOMEM; | |
2603 | ||
2604 | slot = mmc_priv(mmc); | |
2605 | slot->id = id; | |
76756234 | 2606 | slot->sdio_id = host->sdio_id0 + id; |
f95f3850 WN |
2607 | slot->mmc = mmc; |
2608 | slot->host = host; | |
c91eab4b | 2609 | host->slot[id] = slot; |
f95f3850 WN |
2610 | |
2611 | mmc->ops = &dw_mci_ops; | |
1f44a2a5 SJ |
2612 | if (of_property_read_u32_array(host->dev->of_node, |
2613 | "clock-freq-min-max", freq, 2)) { | |
2614 | mmc->f_min = DW_MCI_FREQ_MIN; | |
2615 | mmc->f_max = DW_MCI_FREQ_MAX; | |
2616 | } else { | |
2617 | mmc->f_min = freq[0]; | |
2618 | mmc->f_max = freq[1]; | |
2619 | } | |
f95f3850 | 2620 | |
51da2240 YC |
2621 | /*if there are external regulators, get them*/ |
2622 | ret = mmc_regulator_get_supply(mmc); | |
2623 | if (ret == -EPROBE_DEFER) | |
3cf890fc | 2624 | goto err_host_allocated; |
51da2240 YC |
2625 | |
2626 | if (!mmc->ocr_avail) | |
2627 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
f95f3850 | 2628 | |
fc3d7720 JC |
2629 | if (host->pdata->caps) |
2630 | mmc->caps = host->pdata->caps; | |
fc3d7720 | 2631 | |
6024e166 JC |
2632 | /* |
2633 | * Support MMC_CAP_ERASE by default. | |
2634 | * It needs to use trim/discard/erase commands. | |
2635 | */ | |
2636 | mmc->caps |= MMC_CAP_ERASE; | |
2637 | ||
ab269128 AK |
2638 | if (host->pdata->pm_caps) |
2639 | mmc->pm_caps = host->pdata->pm_caps; | |
2640 | ||
800d78bf TA |
2641 | if (host->dev->of_node) { |
2642 | ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); | |
2643 | if (ctrl_id < 0) | |
2644 | ctrl_id = 0; | |
2645 | } else { | |
2646 | ctrl_id = to_platform_device(host->dev)->id; | |
2647 | } | |
cb27a843 JH |
2648 | if (drv_data && drv_data->caps) |
2649 | mmc->caps |= drv_data->caps[ctrl_id]; | |
800d78bf | 2650 | |
4f408cc6 SJ |
2651 | if (host->pdata->caps2) |
2652 | mmc->caps2 = host->pdata->caps2; | |
4f408cc6 | 2653 | |
3cf890fc DA |
2654 | ret = mmc_of_parse(mmc); |
2655 | if (ret) | |
2656 | goto err_host_allocated; | |
f95f3850 | 2657 | |
2b708df2 | 2658 | /* Useful defaults if platform data is unset. */ |
3fc7eaef | 2659 | if (host->use_dma == TRANS_MODE_IDMAC) { |
2b708df2 | 2660 | mmc->max_segs = host->ring_size; |
225faf87 | 2661 | mmc->max_blk_size = 65535; |
2b708df2 JC |
2662 | mmc->max_seg_size = 0x1000; |
2663 | mmc->max_req_size = mmc->max_seg_size * host->ring_size; | |
2664 | mmc->max_blk_count = mmc->max_req_size / 512; | |
3fc7eaef SL |
2665 | } else if (host->use_dma == TRANS_MODE_EDMAC) { |
2666 | mmc->max_segs = 64; | |
225faf87 | 2667 | mmc->max_blk_size = 65535; |
3fc7eaef SL |
2668 | mmc->max_blk_count = 65535; |
2669 | mmc->max_req_size = | |
2670 | mmc->max_blk_size * mmc->max_blk_count; | |
2671 | mmc->max_seg_size = mmc->max_req_size; | |
f95f3850 | 2672 | } else { |
3fc7eaef | 2673 | /* TRANS_MODE_PIO */ |
2b708df2 | 2674 | mmc->max_segs = 64; |
225faf87 | 2675 | mmc->max_blk_size = 65535; /* BLKSIZ is 16 bits */ |
2b708df2 JC |
2676 | mmc->max_blk_count = 512; |
2677 | mmc->max_req_size = mmc->max_blk_size * | |
2678 | mmc->max_blk_count; | |
2679 | mmc->max_seg_size = mmc->max_req_size; | |
a39e5746 | 2680 | } |
f95f3850 | 2681 | |
c0834a58 | 2682 | dw_mci_get_cd(mmc); |
ae0eb348 | 2683 | |
0cea529d JC |
2684 | ret = mmc_add_host(mmc); |
2685 | if (ret) | |
3cf890fc | 2686 | goto err_host_allocated; |
f95f3850 WN |
2687 | |
2688 | #if defined(CONFIG_DEBUG_FS) | |
2689 | dw_mci_init_debugfs(slot); | |
2690 | #endif | |
2691 | ||
f95f3850 | 2692 | return 0; |
800d78bf | 2693 | |
3cf890fc | 2694 | err_host_allocated: |
800d78bf | 2695 | mmc_free_host(mmc); |
51da2240 | 2696 | return ret; |
f95f3850 WN |
2697 | } |
2698 | ||
2699 | static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) | |
2700 | { | |
f95f3850 WN |
2701 | /* Debugfs stuff is cleaned up by mmc core */ |
2702 | mmc_remove_host(slot->mmc); | |
2703 | slot->host->slot[id] = NULL; | |
2704 | mmc_free_host(slot->mmc); | |
2705 | } | |
2706 | ||
2707 | static void dw_mci_init_dma(struct dw_mci *host) | |
2708 | { | |
69d99fdc | 2709 | int addr_config; |
3fc7eaef SL |
2710 | struct device *dev = host->dev; |
2711 | struct device_node *np = dev->of_node; | |
69d99fdc | 2712 | |
3fc7eaef SL |
2713 | /* |
2714 | * Check tansfer mode from HCON[17:16] | |
2715 | * Clear the ambiguous description of dw_mmc databook: | |
2716 | * 2b'00: No DMA Interface -> Actually means using Internal DMA block | |
2717 | * 2b'01: DesignWare DMA Interface -> Synopsys DW-DMA block | |
2718 | * 2b'10: Generic DMA Interface -> non-Synopsys generic DMA block | |
2719 | * 2b'11: Non DW DMA Interface -> pio only | |
2720 | * Compared to DesignWare DMA Interface, Generic DMA Interface has a | |
2721 | * simpler request/acknowledge handshake mechanism and both of them | |
2722 | * are regarded as external dma master for dw_mmc. | |
2723 | */ | |
2724 | host->use_dma = SDMMC_GET_TRANS_MODE(mci_readl(host, HCON)); | |
2725 | if (host->use_dma == DMA_INTERFACE_IDMA) { | |
2726 | host->use_dma = TRANS_MODE_IDMAC; | |
2727 | } else if (host->use_dma == DMA_INTERFACE_DWDMA || | |
2728 | host->use_dma == DMA_INTERFACE_GDMA) { | |
2729 | host->use_dma = TRANS_MODE_EDMAC; | |
2730 | } else { | |
f95f3850 WN |
2731 | goto no_dma; |
2732 | } | |
2733 | ||
2734 | /* Determine which DMA interface to use */ | |
3fc7eaef SL |
2735 | if (host->use_dma == TRANS_MODE_IDMAC) { |
2736 | /* | |
2737 | * Check ADDR_CONFIG bit in HCON to find | |
2738 | * IDMAC address bus width | |
2739 | */ | |
70692752 | 2740 | addr_config = SDMMC_GET_ADDR_CONFIG(mci_readl(host, HCON)); |
3fc7eaef SL |
2741 | |
2742 | if (addr_config == 1) { | |
2743 | /* host supports IDMAC in 64-bit address mode */ | |
2744 | host->dma_64bit_address = 1; | |
2745 | dev_info(host->dev, | |
2746 | "IDMAC supports 64-bit address mode.\n"); | |
2747 | if (!dma_set_mask(host->dev, DMA_BIT_MASK(64))) | |
2748 | dma_set_coherent_mask(host->dev, | |
2749 | DMA_BIT_MASK(64)); | |
2750 | } else { | |
2751 | /* host supports IDMAC in 32-bit address mode */ | |
2752 | host->dma_64bit_address = 0; | |
2753 | dev_info(host->dev, | |
2754 | "IDMAC supports 32-bit address mode.\n"); | |
2755 | } | |
f95f3850 | 2756 | |
3fc7eaef | 2757 | /* Alloc memory for sg translation */ |
cc190d4c SL |
2758 | host->sg_cpu = dmam_alloc_coherent(host->dev, |
2759 | DESC_RING_BUF_SZ, | |
3fc7eaef SL |
2760 | &host->sg_dma, GFP_KERNEL); |
2761 | if (!host->sg_cpu) { | |
2762 | dev_err(host->dev, | |
2763 | "%s: could not alloc DMA memory\n", | |
2764 | __func__); | |
2765 | goto no_dma; | |
2766 | } | |
2767 | ||
2768 | host->dma_ops = &dw_mci_idmac_ops; | |
2769 | dev_info(host->dev, "Using internal DMA controller.\n"); | |
2770 | } else { | |
2771 | /* TRANS_MODE_EDMAC: check dma bindings again */ | |
2772 | if ((of_property_count_strings(np, "dma-names") < 0) || | |
2773 | (!of_find_property(np, "dmas", NULL))) { | |
2774 | goto no_dma; | |
2775 | } | |
2776 | host->dma_ops = &dw_mci_edmac_ops; | |
2777 | dev_info(host->dev, "Using external DMA controller.\n"); | |
2778 | } | |
f95f3850 | 2779 | |
e1631f98 JC |
2780 | if (host->dma_ops->init && host->dma_ops->start && |
2781 | host->dma_ops->stop && host->dma_ops->cleanup) { | |
f95f3850 | 2782 | if (host->dma_ops->init(host)) { |
0e3a22c0 SL |
2783 | dev_err(host->dev, "%s: Unable to initialize DMA Controller.\n", |
2784 | __func__); | |
f95f3850 WN |
2785 | goto no_dma; |
2786 | } | |
2787 | } else { | |
4a90920c | 2788 | dev_err(host->dev, "DMA initialization not found.\n"); |
f95f3850 WN |
2789 | goto no_dma; |
2790 | } | |
2791 | ||
f95f3850 WN |
2792 | return; |
2793 | ||
2794 | no_dma: | |
4a90920c | 2795 | dev_info(host->dev, "Using PIO mode.\n"); |
3fc7eaef | 2796 | host->use_dma = TRANS_MODE_PIO; |
f95f3850 WN |
2797 | } |
2798 | ||
31bff450 | 2799 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) |
f95f3850 WN |
2800 | { |
2801 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
31bff450 | 2802 | u32 ctrl; |
f95f3850 | 2803 | |
31bff450 SJ |
2804 | ctrl = mci_readl(host, CTRL); |
2805 | ctrl |= reset; | |
2806 | mci_writel(host, CTRL, ctrl); | |
f95f3850 WN |
2807 | |
2808 | /* wait till resets clear */ | |
2809 | do { | |
2810 | ctrl = mci_readl(host, CTRL); | |
31bff450 | 2811 | if (!(ctrl & reset)) |
f95f3850 WN |
2812 | return true; |
2813 | } while (time_before(jiffies, timeout)); | |
2814 | ||
31bff450 SJ |
2815 | dev_err(host->dev, |
2816 | "Timeout resetting block (ctrl reset %#x)\n", | |
2817 | ctrl & reset); | |
f95f3850 WN |
2818 | |
2819 | return false; | |
2820 | } | |
2821 | ||
3a33a94c | 2822 | static bool dw_mci_reset(struct dw_mci *host) |
31bff450 | 2823 | { |
3a33a94c SR |
2824 | u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; |
2825 | bool ret = false; | |
2826 | ||
31bff450 SJ |
2827 | /* |
2828 | * Reseting generates a block interrupt, hence setting | |
2829 | * the scatter-gather pointer to NULL. | |
2830 | */ | |
2831 | if (host->sg) { | |
2832 | sg_miter_stop(&host->sg_miter); | |
2833 | host->sg = NULL; | |
2834 | } | |
2835 | ||
3a33a94c SR |
2836 | if (host->use_dma) |
2837 | flags |= SDMMC_CTRL_DMA_RESET; | |
31bff450 | 2838 | |
3a33a94c SR |
2839 | if (dw_mci_ctrl_reset(host, flags)) { |
2840 | /* | |
2841 | * In all cases we clear the RAWINTS register to clear any | |
2842 | * interrupts. | |
2843 | */ | |
2844 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2845 | ||
2846 | /* if using dma we wait for dma_req to clear */ | |
2847 | if (host->use_dma) { | |
2848 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
2849 | u32 status; | |
0e3a22c0 | 2850 | |
3a33a94c SR |
2851 | do { |
2852 | status = mci_readl(host, STATUS); | |
2853 | if (!(status & SDMMC_STATUS_DMA_REQ)) | |
2854 | break; | |
2855 | cpu_relax(); | |
2856 | } while (time_before(jiffies, timeout)); | |
2857 | ||
2858 | if (status & SDMMC_STATUS_DMA_REQ) { | |
2859 | dev_err(host->dev, | |
0e3a22c0 SL |
2860 | "%s: Timeout waiting for dma_req to clear during reset\n", |
2861 | __func__); | |
3a33a94c SR |
2862 | goto ciu_out; |
2863 | } | |
2864 | ||
2865 | /* when using DMA next we reset the fifo again */ | |
2866 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) | |
2867 | goto ciu_out; | |
2868 | } | |
2869 | } else { | |
2870 | /* if the controller reset bit did clear, then set clock regs */ | |
2871 | if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { | |
0e3a22c0 SL |
2872 | dev_err(host->dev, |
2873 | "%s: fifo/dma reset bits didn't clear but ciu was reset, doing clock update\n", | |
3a33a94c SR |
2874 | __func__); |
2875 | goto ciu_out; | |
2876 | } | |
2877 | } | |
2878 | ||
3fc7eaef SL |
2879 | if (host->use_dma == TRANS_MODE_IDMAC) |
2880 | /* It is also recommended that we reset and reprogram idmac */ | |
2881 | dw_mci_idmac_reset(host); | |
3a33a94c SR |
2882 | |
2883 | ret = true; | |
2884 | ||
2885 | ciu_out: | |
2886 | /* After a CTRL reset we need to have CIU set clock registers */ | |
2887 | mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0); | |
2888 | ||
2889 | return ret; | |
31bff450 SJ |
2890 | } |
2891 | ||
5c935165 DA |
2892 | static void dw_mci_cmd11_timer(unsigned long arg) |
2893 | { | |
2894 | struct dw_mci *host = (struct dw_mci *)arg; | |
2895 | ||
fd674198 DA |
2896 | if (host->state != STATE_SENDING_CMD11) { |
2897 | dev_warn(host->dev, "Unexpected CMD11 timeout\n"); | |
2898 | return; | |
2899 | } | |
5c935165 DA |
2900 | |
2901 | host->cmd_status = SDMMC_INT_RTO; | |
2902 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
2903 | tasklet_schedule(&host->tasklet); | |
2904 | } | |
2905 | ||
57e10486 AK |
2906 | static void dw_mci_dto_timer(unsigned long arg) |
2907 | { | |
2908 | struct dw_mci *host = (struct dw_mci *)arg; | |
2909 | ||
2910 | switch (host->state) { | |
2911 | case STATE_SENDING_DATA: | |
2912 | case STATE_DATA_BUSY: | |
2913 | /* | |
2914 | * If DTO interrupt does NOT come in sending data state, | |
2915 | * we should notify the driver to terminate current transfer | |
2916 | * and report a data timeout to the core. | |
2917 | */ | |
2918 | host->data_status = SDMMC_INT_DRTO; | |
2919 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
2920 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
2921 | tasklet_schedule(&host->tasklet); | |
2922 | break; | |
2923 | default: | |
2924 | break; | |
2925 | } | |
2926 | } | |
2927 | ||
c91eab4b | 2928 | #ifdef CONFIG_OF |
c91eab4b TA |
2929 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) |
2930 | { | |
2931 | struct dw_mci_board *pdata; | |
2932 | struct device *dev = host->dev; | |
2933 | struct device_node *np = dev->of_node; | |
e95baf13 | 2934 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
e8cc37b8 | 2935 | int ret; |
3c6d89ea | 2936 | u32 clock_frequency; |
c91eab4b TA |
2937 | |
2938 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
bf3707ea | 2939 | if (!pdata) |
c91eab4b | 2940 | return ERR_PTR(-ENOMEM); |
c91eab4b | 2941 | |
d6786fef | 2942 | /* find reset controller when exist */ |
3a667e3f | 2943 | pdata->rstc = devm_reset_control_get_optional(dev, "reset"); |
d6786fef GX |
2944 | if (IS_ERR(pdata->rstc)) { |
2945 | if (PTR_ERR(pdata->rstc) == -EPROBE_DEFER) | |
2946 | return ERR_PTR(-EPROBE_DEFER); | |
2947 | } | |
2948 | ||
c91eab4b | 2949 | /* find out number of slots supported */ |
8a629d26 | 2950 | of_property_read_u32(np, "num-slots", &pdata->num_slots); |
c91eab4b | 2951 | |
c91eab4b | 2952 | if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth)) |
0e3a22c0 SL |
2953 | dev_info(dev, |
2954 | "fifo-depth property not found, using value of FIFOTH register as default\n"); | |
c91eab4b TA |
2955 | |
2956 | of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); | |
2957 | ||
3c6d89ea DA |
2958 | if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) |
2959 | pdata->bus_hz = clock_frequency; | |
2960 | ||
cb27a843 JH |
2961 | if (drv_data && drv_data->parse_dt) { |
2962 | ret = drv_data->parse_dt(host); | |
800d78bf TA |
2963 | if (ret) |
2964 | return ERR_PTR(ret); | |
2965 | } | |
2966 | ||
c91eab4b TA |
2967 | return pdata; |
2968 | } | |
2969 | ||
2970 | #else /* CONFIG_OF */ | |
2971 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
2972 | { | |
2973 | return ERR_PTR(-EINVAL); | |
2974 | } | |
2975 | #endif /* CONFIG_OF */ | |
2976 | ||
fa0c3283 DA |
2977 | static void dw_mci_enable_cd(struct dw_mci *host) |
2978 | { | |
fa0c3283 DA |
2979 | unsigned long irqflags; |
2980 | u32 temp; | |
2981 | int i; | |
e8cc37b8 | 2982 | struct dw_mci_slot *slot; |
fa0c3283 | 2983 | |
e8cc37b8 SL |
2984 | /* |
2985 | * No need for CD if all slots have a non-error GPIO | |
2986 | * as well as broken card detection is found. | |
2987 | */ | |
fa0c3283 | 2988 | for (i = 0; i < host->num_slots; i++) { |
e8cc37b8 SL |
2989 | slot = host->slot[i]; |
2990 | if (slot->mmc->caps & MMC_CAP_NEEDS_POLL) | |
2991 | return; | |
fa0c3283 | 2992 | |
287980e4 | 2993 | if (mmc_gpio_get_cd(slot->mmc) < 0) |
fa0c3283 DA |
2994 | break; |
2995 | } | |
2996 | if (i == host->num_slots) | |
2997 | return; | |
2998 | ||
2999 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
3000 | temp = mci_readl(host, INTMASK); | |
3001 | temp |= SDMMC_INT_CD; | |
3002 | mci_writel(host, INTMASK, temp); | |
3003 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
3004 | } | |
3005 | ||
62ca8034 | 3006 | int dw_mci_probe(struct dw_mci *host) |
f95f3850 | 3007 | { |
e95baf13 | 3008 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
62ca8034 | 3009 | int width, i, ret = 0; |
f95f3850 | 3010 | u32 fifo_size; |
1c2215b7 | 3011 | int init_slots = 0; |
f95f3850 | 3012 | |
c91eab4b TA |
3013 | if (!host->pdata) { |
3014 | host->pdata = dw_mci_parse_dt(host); | |
d6786fef GX |
3015 | if (PTR_ERR(host->pdata) == -EPROBE_DEFER) { |
3016 | return -EPROBE_DEFER; | |
3017 | } else if (IS_ERR(host->pdata)) { | |
c91eab4b TA |
3018 | dev_err(host->dev, "platform data not available\n"); |
3019 | return -EINVAL; | |
3020 | } | |
f95f3850 WN |
3021 | } |
3022 | ||
780f22af | 3023 | host->biu_clk = devm_clk_get(host->dev, "biu"); |
f90a0612 TA |
3024 | if (IS_ERR(host->biu_clk)) { |
3025 | dev_dbg(host->dev, "biu clock not available\n"); | |
3026 | } else { | |
3027 | ret = clk_prepare_enable(host->biu_clk); | |
3028 | if (ret) { | |
3029 | dev_err(host->dev, "failed to enable biu clock\n"); | |
f90a0612 TA |
3030 | return ret; |
3031 | } | |
3032 | } | |
3033 | ||
780f22af | 3034 | host->ciu_clk = devm_clk_get(host->dev, "ciu"); |
f90a0612 TA |
3035 | if (IS_ERR(host->ciu_clk)) { |
3036 | dev_dbg(host->dev, "ciu clock not available\n"); | |
3c6d89ea | 3037 | host->bus_hz = host->pdata->bus_hz; |
f90a0612 TA |
3038 | } else { |
3039 | ret = clk_prepare_enable(host->ciu_clk); | |
3040 | if (ret) { | |
3041 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
f90a0612 TA |
3042 | goto err_clk_biu; |
3043 | } | |
f90a0612 | 3044 | |
3c6d89ea DA |
3045 | if (host->pdata->bus_hz) { |
3046 | ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); | |
3047 | if (ret) | |
3048 | dev_warn(host->dev, | |
612de4c1 | 3049 | "Unable to set bus rate to %uHz\n", |
3c6d89ea DA |
3050 | host->pdata->bus_hz); |
3051 | } | |
f90a0612 | 3052 | host->bus_hz = clk_get_rate(host->ciu_clk); |
3c6d89ea | 3053 | } |
f90a0612 | 3054 | |
612de4c1 JC |
3055 | if (!host->bus_hz) { |
3056 | dev_err(host->dev, | |
3057 | "Platform data must supply bus speed\n"); | |
3058 | ret = -ENODEV; | |
3059 | goto err_clk_ciu; | |
3060 | } | |
3061 | ||
002f0d5c YK |
3062 | if (drv_data && drv_data->init) { |
3063 | ret = drv_data->init(host); | |
3064 | if (ret) { | |
3065 | dev_err(host->dev, | |
3066 | "implementation specific init failed\n"); | |
3067 | goto err_clk_ciu; | |
3068 | } | |
3069 | } | |
3070 | ||
d6786fef GX |
3071 | if (!IS_ERR(host->pdata->rstc)) { |
3072 | reset_control_assert(host->pdata->rstc); | |
3073 | usleep_range(10, 50); | |
3074 | reset_control_deassert(host->pdata->rstc); | |
3075 | } | |
3076 | ||
5c935165 DA |
3077 | setup_timer(&host->cmd11_timer, |
3078 | dw_mci_cmd11_timer, (unsigned long)host); | |
3079 | ||
16a34574 JC |
3080 | setup_timer(&host->dto_timer, |
3081 | dw_mci_dto_timer, (unsigned long)host); | |
57e10486 | 3082 | |
f95f3850 | 3083 | spin_lock_init(&host->lock); |
f8c58c11 | 3084 | spin_lock_init(&host->irq_lock); |
f95f3850 WN |
3085 | INIT_LIST_HEAD(&host->queue); |
3086 | ||
f95f3850 WN |
3087 | /* |
3088 | * Get the host data width - this assumes that HCON has been set with | |
3089 | * the correct values. | |
3090 | */ | |
70692752 | 3091 | i = SDMMC_GET_HDATA_WIDTH(mci_readl(host, HCON)); |
f95f3850 WN |
3092 | if (!i) { |
3093 | host->push_data = dw_mci_push_data16; | |
3094 | host->pull_data = dw_mci_pull_data16; | |
3095 | width = 16; | |
3096 | host->data_shift = 1; | |
3097 | } else if (i == 2) { | |
3098 | host->push_data = dw_mci_push_data64; | |
3099 | host->pull_data = dw_mci_pull_data64; | |
3100 | width = 64; | |
3101 | host->data_shift = 3; | |
3102 | } else { | |
3103 | /* Check for a reserved value, and warn if it is */ | |
3104 | WARN((i != 1), | |
3105 | "HCON reports a reserved host data width!\n" | |
3106 | "Defaulting to 32-bit access.\n"); | |
3107 | host->push_data = dw_mci_push_data32; | |
3108 | host->pull_data = dw_mci_pull_data32; | |
3109 | width = 32; | |
3110 | host->data_shift = 2; | |
3111 | } | |
3112 | ||
3113 | /* Reset all blocks */ | |
3744415c SL |
3114 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { |
3115 | ret = -ENODEV; | |
3116 | goto err_clk_ciu; | |
3117 | } | |
141a712a SJ |
3118 | |
3119 | host->dma_ops = host->pdata->dma_ops; | |
3120 | dw_mci_init_dma(host); | |
f95f3850 WN |
3121 | |
3122 | /* Clear the interrupts for the host controller */ | |
3123 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
3124 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
3125 | ||
3126 | /* Put in max timeout */ | |
3127 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
3128 | ||
3129 | /* | |
3130 | * FIFO threshold settings RxMark = fifo_size / 2 - 1, | |
3131 | * Tx Mark = fifo_size / 2 DMA Size = 8 | |
3132 | */ | |
b86d8253 JH |
3133 | if (!host->pdata->fifo_depth) { |
3134 | /* | |
3135 | * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may | |
3136 | * have been overwritten by the bootloader, just like we're | |
3137 | * about to do, so if you know the value for your hardware, you | |
3138 | * should put it in the platform data. | |
3139 | */ | |
3140 | fifo_size = mci_readl(host, FIFOTH); | |
8234e869 | 3141 | fifo_size = 1 + ((fifo_size >> 16) & 0xfff); |
b86d8253 JH |
3142 | } else { |
3143 | fifo_size = host->pdata->fifo_depth; | |
3144 | } | |
3145 | host->fifo_depth = fifo_size; | |
52426899 SJ |
3146 | host->fifoth_val = |
3147 | SDMMC_SET_FIFOTH(0x2, fifo_size / 2 - 1, fifo_size / 2); | |
e61cf118 | 3148 | mci_writel(host, FIFOTH, host->fifoth_val); |
f95f3850 WN |
3149 | |
3150 | /* disable clock to CIU */ | |
3151 | mci_writel(host, CLKENA, 0); | |
3152 | mci_writel(host, CLKSRC, 0); | |
3153 | ||
63008768 JH |
3154 | /* |
3155 | * In 2.40a spec, Data offset is changed. | |
3156 | * Need to check the version-id and set data-offset for DATA register. | |
3157 | */ | |
3158 | host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); | |
3159 | dev_info(host->dev, "Version ID is %04x\n", host->verid); | |
3160 | ||
3161 | if (host->verid < DW_MMC_240A) | |
76184ac1 | 3162 | host->fifo_reg = host->regs + DATA_OFFSET; |
63008768 | 3163 | else |
76184ac1 | 3164 | host->fifo_reg = host->regs + DATA_240A_OFFSET; |
63008768 | 3165 | |
f95f3850 | 3166 | tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); |
780f22af SJ |
3167 | ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, |
3168 | host->irq_flags, "dw-mci", host); | |
f95f3850 | 3169 | if (ret) |
6130e7a9 | 3170 | goto err_dmaunmap; |
f95f3850 | 3171 | |
f95f3850 WN |
3172 | if (host->pdata->num_slots) |
3173 | host->num_slots = host->pdata->num_slots; | |
3174 | else | |
8a629d26 SL |
3175 | host->num_slots = 1; |
3176 | ||
3177 | if (host->num_slots < 1 || | |
3178 | host->num_slots > SDMMC_GET_SLOT_NUM(mci_readl(host, HCON))) { | |
3179 | dev_err(host->dev, | |
3180 | "Platform data must supply correct num_slots.\n"); | |
3181 | ret = -ENODEV; | |
3182 | goto err_clk_ciu; | |
3183 | } | |
f95f3850 | 3184 | |
2da1d7f2 | 3185 | /* |
fa0c3283 | 3186 | * Enable interrupts for command done, data over, data empty, |
2da1d7f2 YC |
3187 | * receive ready and error such as transmit, receive timeout, crc error |
3188 | */ | |
2da1d7f2 YC |
3189 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | |
3190 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
fa0c3283 | 3191 | DW_MCI_ERROR_FLAGS); |
0e3a22c0 SL |
3192 | /* Enable mci interrupt */ |
3193 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); | |
2da1d7f2 | 3194 | |
0e3a22c0 SL |
3195 | dev_info(host->dev, |
3196 | "DW MMC controller at irq %d,%d bit host data width,%u deep fifo\n", | |
2da1d7f2 YC |
3197 | host->irq, width, fifo_size); |
3198 | ||
f95f3850 WN |
3199 | /* We need at least one slot to succeed */ |
3200 | for (i = 0; i < host->num_slots; i++) { | |
3201 | ret = dw_mci_init_slot(host, i); | |
1c2215b7 TA |
3202 | if (ret) |
3203 | dev_dbg(host->dev, "slot %d init failed\n", i); | |
3204 | else | |
3205 | init_slots++; | |
3206 | } | |
3207 | ||
3208 | if (init_slots) { | |
3209 | dev_info(host->dev, "%d slots initialized\n", init_slots); | |
3210 | } else { | |
0e3a22c0 SL |
3211 | dev_dbg(host->dev, |
3212 | "attempted to initialize %d slots, but failed on all\n", | |
3213 | host->num_slots); | |
6130e7a9 | 3214 | goto err_dmaunmap; |
f95f3850 WN |
3215 | } |
3216 | ||
b793f658 DA |
3217 | /* Now that slots are all setup, we can enable card detect */ |
3218 | dw_mci_enable_cd(host); | |
3219 | ||
f95f3850 WN |
3220 | return 0; |
3221 | ||
f95f3850 WN |
3222 | err_dmaunmap: |
3223 | if (host->use_dma && host->dma_ops->exit) | |
3224 | host->dma_ops->exit(host); | |
f90a0612 | 3225 | |
d6786fef GX |
3226 | if (!IS_ERR(host->pdata->rstc)) |
3227 | reset_control_assert(host->pdata->rstc); | |
3228 | ||
f90a0612 | 3229 | err_clk_ciu: |
7037f3be | 3230 | clk_disable_unprepare(host->ciu_clk); |
780f22af | 3231 | |
f90a0612 | 3232 | err_clk_biu: |
7037f3be | 3233 | clk_disable_unprepare(host->biu_clk); |
780f22af | 3234 | |
f95f3850 WN |
3235 | return ret; |
3236 | } | |
62ca8034 | 3237 | EXPORT_SYMBOL(dw_mci_probe); |
f95f3850 | 3238 | |
62ca8034 | 3239 | void dw_mci_remove(struct dw_mci *host) |
f95f3850 | 3240 | { |
f95f3850 WN |
3241 | int i; |
3242 | ||
f95f3850 | 3243 | for (i = 0; i < host->num_slots; i++) { |
4a90920c | 3244 | dev_dbg(host->dev, "remove slot %d\n", i); |
f95f3850 WN |
3245 | if (host->slot[i]) |
3246 | dw_mci_cleanup_slot(host->slot[i], i); | |
3247 | } | |
3248 | ||
048fd7e6 PT |
3249 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
3250 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
3251 | ||
f95f3850 WN |
3252 | /* disable clock to CIU */ |
3253 | mci_writel(host, CLKENA, 0); | |
3254 | mci_writel(host, CLKSRC, 0); | |
3255 | ||
f95f3850 WN |
3256 | if (host->use_dma && host->dma_ops->exit) |
3257 | host->dma_ops->exit(host); | |
3258 | ||
d6786fef GX |
3259 | if (!IS_ERR(host->pdata->rstc)) |
3260 | reset_control_assert(host->pdata->rstc); | |
3261 | ||
7037f3be JC |
3262 | clk_disable_unprepare(host->ciu_clk); |
3263 | clk_disable_unprepare(host->biu_clk); | |
f95f3850 | 3264 | } |
62ca8034 SH |
3265 | EXPORT_SYMBOL(dw_mci_remove); |
3266 | ||
3267 | ||
f95f3850 | 3268 | |
6fe8890d | 3269 | #ifdef CONFIG_PM_SLEEP |
f95f3850 WN |
3270 | /* |
3271 | * TODO: we should probably disable the clock to the card in the suspend path. | |
3272 | */ | |
62ca8034 | 3273 | int dw_mci_suspend(struct dw_mci *host) |
f95f3850 | 3274 | { |
3fc7eaef SL |
3275 | if (host->use_dma && host->dma_ops->exit) |
3276 | host->dma_ops->exit(host); | |
3277 | ||
f95f3850 WN |
3278 | return 0; |
3279 | } | |
62ca8034 | 3280 | EXPORT_SYMBOL(dw_mci_suspend); |
f95f3850 | 3281 | |
62ca8034 | 3282 | int dw_mci_resume(struct dw_mci *host) |
f95f3850 WN |
3283 | { |
3284 | int i, ret; | |
f95f3850 | 3285 | |
3a33a94c | 3286 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { |
e61cf118 JC |
3287 | ret = -ENODEV; |
3288 | return ret; | |
3289 | } | |
3290 | ||
3bfe619d | 3291 | if (host->use_dma && host->dma_ops->init) |
141a712a SJ |
3292 | host->dma_ops->init(host); |
3293 | ||
52426899 SJ |
3294 | /* |
3295 | * Restore the initial value at FIFOTH register | |
3296 | * And Invalidate the prev_blksz with zero | |
3297 | */ | |
e61cf118 | 3298 | mci_writel(host, FIFOTH, host->fifoth_val); |
52426899 | 3299 | host->prev_blksz = 0; |
e61cf118 | 3300 | |
2eb2944f DA |
3301 | /* Put in max timeout */ |
3302 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
3303 | ||
e61cf118 JC |
3304 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
3305 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
3306 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
fa0c3283 | 3307 | DW_MCI_ERROR_FLAGS); |
e61cf118 JC |
3308 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); |
3309 | ||
f95f3850 WN |
3310 | for (i = 0; i < host->num_slots; i++) { |
3311 | struct dw_mci_slot *slot = host->slot[i]; | |
0e3a22c0 | 3312 | |
f95f3850 WN |
3313 | if (!slot) |
3314 | continue; | |
ab269128 AK |
3315 | if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { |
3316 | dw_mci_set_ios(slot->mmc, &slot->mmc->ios); | |
3317 | dw_mci_setup_bus(slot, true); | |
3318 | } | |
f95f3850 | 3319 | } |
fa0c3283 DA |
3320 | |
3321 | /* Now that slots are all setup, we can enable card detect */ | |
3322 | dw_mci_enable_cd(host); | |
3323 | ||
f95f3850 WN |
3324 | return 0; |
3325 | } | |
62ca8034 | 3326 | EXPORT_SYMBOL(dw_mci_resume); |
6fe8890d JC |
3327 | #endif /* CONFIG_PM_SLEEP */ |
3328 | ||
f95f3850 WN |
3329 | static int __init dw_mci_init(void) |
3330 | { | |
8e1c4e4d | 3331 | pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); |
62ca8034 | 3332 | return 0; |
f95f3850 WN |
3333 | } |
3334 | ||
3335 | static void __exit dw_mci_exit(void) | |
3336 | { | |
f95f3850 WN |
3337 | } |
3338 | ||
3339 | module_init(dw_mci_init); | |
3340 | module_exit(dw_mci_exit); | |
3341 | ||
3342 | MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); | |
3343 | MODULE_AUTHOR("NXP Semiconductor VietNam"); | |
3344 | MODULE_AUTHOR("Imagination Technologies Ltd"); | |
3345 | MODULE_LICENSE("GPL v2"); |