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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> | |
b6d2d81c | 22 | #include <linux/iopoll.h> |
f95f3850 WN |
23 | #include <linux/ioport.h> |
24 | #include <linux/module.h> | |
25 | #include <linux/platform_device.h> | |
a6db2c86 | 26 | #include <linux/pm_runtime.h> |
f95f3850 WN |
27 | #include <linux/seq_file.h> |
28 | #include <linux/slab.h> | |
29 | #include <linux/stat.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/irq.h> | |
b24c8b26 | 32 | #include <linux/mmc/card.h> |
f95f3850 WN |
33 | #include <linux/mmc/host.h> |
34 | #include <linux/mmc/mmc.h> | |
01730558 | 35 | #include <linux/mmc/sd.h> |
90c2143a | 36 | #include <linux/mmc/sdio.h> |
f95f3850 | 37 | #include <linux/bitops.h> |
c07946a3 | 38 | #include <linux/regulator/consumer.h> |
c91eab4b | 39 | #include <linux/of.h> |
55a6ceb2 | 40 | #include <linux/of_gpio.h> |
bf626e55 | 41 | #include <linux/mmc/slot-gpio.h> |
f95f3850 WN |
42 | |
43 | #include "dw_mmc.h" | |
44 | ||
45 | /* Common flag combinations */ | |
3f7eec62 | 46 | #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \ |
f95f3850 | 47 | SDMMC_INT_HTO | SDMMC_INT_SBE | \ |
7a3c5677 | 48 | SDMMC_INT_EBE | SDMMC_INT_HLE) |
f95f3850 | 49 | #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ |
7a3c5677 | 50 | SDMMC_INT_RESP_ERR | SDMMC_INT_HLE) |
f95f3850 | 51 | #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ |
7a3c5677 | 52 | DW_MCI_CMD_ERROR_FLAGS) |
f95f3850 WN |
53 | #define DW_MCI_SEND_STATUS 1 |
54 | #define DW_MCI_RECV_STATUS 2 | |
55 | #define DW_MCI_DMA_THRESHOLD 16 | |
56 | ||
1f44a2a5 | 57 | #define DW_MCI_FREQ_MAX 200000000 /* unit: HZ */ |
72e83577 | 58 | #define DW_MCI_FREQ_MIN 100000 /* unit: HZ */ |
1f44a2a5 | 59 | |
fc79a4d6 JS |
60 | #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \ |
61 | SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ | |
62 | SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \ | |
63 | SDMMC_IDMAC_INT_TI) | |
64 | ||
cc190d4c SL |
65 | #define DESC_RING_BUF_SZ PAGE_SIZE |
66 | ||
69d99fdc PT |
67 | struct idmac_desc_64addr { |
68 | u32 des0; /* Control Descriptor */ | |
b6d2d81c SL |
69 | #define IDMAC_OWN_CLR64(x) \ |
70 | !((x) & cpu_to_le32(IDMAC_DES0_OWN)) | |
69d99fdc PT |
71 | |
72 | u32 des1; /* Reserved */ | |
73 | ||
74 | u32 des2; /*Buffer sizes */ | |
75 | #define IDMAC_64ADDR_SET_BUFFER1_SIZE(d, s) \ | |
6687c42f BD |
76 | ((d)->des2 = ((d)->des2 & cpu_to_le32(0x03ffe000)) | \ |
77 | ((cpu_to_le32(s)) & cpu_to_le32(0x1fff))) | |
69d99fdc PT |
78 | |
79 | u32 des3; /* Reserved */ | |
80 | ||
81 | u32 des4; /* Lower 32-bits of Buffer Address Pointer 1*/ | |
82 | u32 des5; /* Upper 32-bits of Buffer Address Pointer 1*/ | |
83 | ||
84 | u32 des6; /* Lower 32-bits of Next Descriptor Address */ | |
85 | u32 des7; /* Upper 32-bits of Next Descriptor Address */ | |
86 | }; | |
87 | ||
f95f3850 | 88 | struct idmac_desc { |
6687c42f | 89 | __le32 des0; /* Control Descriptor */ |
f95f3850 WN |
90 | #define IDMAC_DES0_DIC BIT(1) |
91 | #define IDMAC_DES0_LD BIT(2) | |
92 | #define IDMAC_DES0_FD BIT(3) | |
93 | #define IDMAC_DES0_CH BIT(4) | |
94 | #define IDMAC_DES0_ER BIT(5) | |
95 | #define IDMAC_DES0_CES BIT(30) | |
96 | #define IDMAC_DES0_OWN BIT(31) | |
97 | ||
6687c42f | 98 | __le32 des1; /* Buffer sizes */ |
f95f3850 | 99 | #define IDMAC_SET_BUFFER1_SIZE(d, s) \ |
e5306c3a | 100 | ((d)->des1 = ((d)->des1 & cpu_to_le32(0x03ffe000)) | (cpu_to_le32((s) & 0x1fff))) |
f95f3850 | 101 | |
6687c42f | 102 | __le32 des2; /* buffer 1 physical address */ |
f95f3850 | 103 | |
6687c42f | 104 | __le32 des3; /* buffer 2 physical address */ |
f95f3850 | 105 | }; |
5959b32e AB |
106 | |
107 | /* Each descriptor can transfer up to 4KB of data in chained mode */ | |
108 | #define DW_MCI_DESC_DATA_LENGTH 0x1000 | |
f95f3850 | 109 | |
f95f3850 WN |
110 | #if defined(CONFIG_DEBUG_FS) |
111 | static int dw_mci_req_show(struct seq_file *s, void *v) | |
112 | { | |
113 | struct dw_mci_slot *slot = s->private; | |
114 | struct mmc_request *mrq; | |
115 | struct mmc_command *cmd; | |
116 | struct mmc_command *stop; | |
117 | struct mmc_data *data; | |
118 | ||
119 | /* Make sure we get a consistent snapshot */ | |
120 | spin_lock_bh(&slot->host->lock); | |
121 | mrq = slot->mrq; | |
122 | ||
123 | if (mrq) { | |
124 | cmd = mrq->cmd; | |
125 | data = mrq->data; | |
126 | stop = mrq->stop; | |
127 | ||
128 | if (cmd) | |
129 | seq_printf(s, | |
130 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
131 | cmd->opcode, cmd->arg, cmd->flags, | |
132 | cmd->resp[0], cmd->resp[1], cmd->resp[2], | |
133 | cmd->resp[2], cmd->error); | |
134 | if (data) | |
135 | seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", | |
136 | data->bytes_xfered, data->blocks, | |
137 | data->blksz, data->flags, data->error); | |
138 | if (stop) | |
139 | seq_printf(s, | |
140 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
141 | stop->opcode, stop->arg, stop->flags, | |
142 | stop->resp[0], stop->resp[1], stop->resp[2], | |
143 | stop->resp[2], stop->error); | |
144 | } | |
145 | ||
146 | spin_unlock_bh(&slot->host->lock); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int dw_mci_req_open(struct inode *inode, struct file *file) | |
152 | { | |
153 | return single_open(file, dw_mci_req_show, inode->i_private); | |
154 | } | |
155 | ||
156 | static const struct file_operations dw_mci_req_fops = { | |
157 | .owner = THIS_MODULE, | |
158 | .open = dw_mci_req_open, | |
159 | .read = seq_read, | |
160 | .llseek = seq_lseek, | |
161 | .release = single_release, | |
162 | }; | |
163 | ||
164 | static int dw_mci_regs_show(struct seq_file *s, void *v) | |
165 | { | |
21657ebd JC |
166 | struct dw_mci *host = s->private; |
167 | ||
168 | seq_printf(s, "STATUS:\t0x%08x\n", mci_readl(host, STATUS)); | |
169 | seq_printf(s, "RINTSTS:\t0x%08x\n", mci_readl(host, RINTSTS)); | |
170 | seq_printf(s, "CMD:\t0x%08x\n", mci_readl(host, CMD)); | |
171 | seq_printf(s, "CTRL:\t0x%08x\n", mci_readl(host, CTRL)); | |
172 | seq_printf(s, "INTMASK:\t0x%08x\n", mci_readl(host, INTMASK)); | |
173 | seq_printf(s, "CLKENA:\t0x%08x\n", mci_readl(host, CLKENA)); | |
f95f3850 WN |
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 | ||
8e6db1f6 SL |
233 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) |
234 | { | |
235 | u32 ctrl; | |
236 | ||
237 | ctrl = mci_readl(host, CTRL); | |
238 | ctrl |= reset; | |
239 | mci_writel(host, CTRL, ctrl); | |
240 | ||
241 | /* wait till resets clear */ | |
242 | if (readl_poll_timeout_atomic(host->regs + SDMMC_CTRL, ctrl, | |
243 | !(ctrl & reset), | |
244 | 1, 500 * USEC_PER_MSEC)) { | |
245 | dev_err(host->dev, | |
246 | "Timeout resetting block (ctrl reset %#x)\n", | |
247 | ctrl & reset); | |
248 | return false; | |
249 | } | |
250 | ||
251 | return true; | |
252 | } | |
01730558 | 253 | |
4dba18de SL |
254 | static void dw_mci_wait_while_busy(struct dw_mci *host, u32 cmd_flags) |
255 | { | |
256 | u32 status; | |
257 | ||
258 | /* | |
259 | * Databook says that before issuing a new data transfer command | |
260 | * we need to check to see if the card is busy. Data transfer commands | |
261 | * all have SDMMC_CMD_PRV_DAT_WAIT set, so we'll key off that. | |
262 | * | |
263 | * ...also allow sending for SDMMC_CMD_VOLT_SWITCH where busy is | |
264 | * expected. | |
265 | */ | |
266 | if ((cmd_flags & SDMMC_CMD_PRV_DAT_WAIT) && | |
267 | !(cmd_flags & SDMMC_CMD_VOLT_SWITCH)) { | |
268 | if (readl_poll_timeout_atomic(host->regs + SDMMC_STATUS, | |
269 | status, | |
270 | !(status & SDMMC_STATUS_BUSY), | |
271 | 10, 500 * USEC_PER_MSEC)) | |
272 | dev_err(host->dev, "Busy; trying anyway\n"); | |
273 | } | |
274 | } | |
275 | ||
276 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) | |
277 | { | |
278 | struct dw_mci *host = slot->host; | |
279 | unsigned int cmd_status = 0; | |
280 | ||
281 | mci_writel(host, CMDARG, arg); | |
282 | wmb(); /* drain writebuffer */ | |
283 | dw_mci_wait_while_busy(host, cmd); | |
284 | mci_writel(host, CMD, SDMMC_CMD_START | cmd); | |
285 | ||
286 | if (readl_poll_timeout_atomic(host->regs + SDMMC_CMD, cmd_status, | |
287 | !(cmd_status & SDMMC_CMD_START), | |
288 | 1, 500 * USEC_PER_MSEC)) | |
289 | dev_err(&slot->mmc->class_dev, | |
290 | "Timeout sending command (cmd %#x arg %#x status %#x)\n", | |
291 | cmd, arg, cmd_status); | |
292 | } | |
293 | ||
f95f3850 WN |
294 | static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) |
295 | { | |
800d78bf | 296 | struct dw_mci_slot *slot = mmc_priv(mmc); |
01730558 | 297 | struct dw_mci *host = slot->host; |
f95f3850 | 298 | u32 cmdr; |
f95f3850 | 299 | |
0e3a22c0 | 300 | cmd->error = -EINPROGRESS; |
f95f3850 WN |
301 | cmdr = cmd->opcode; |
302 | ||
90c2143a SJ |
303 | if (cmd->opcode == MMC_STOP_TRANSMISSION || |
304 | cmd->opcode == MMC_GO_IDLE_STATE || | |
305 | cmd->opcode == MMC_GO_INACTIVE_STATE || | |
306 | (cmd->opcode == SD_IO_RW_DIRECT && | |
307 | ((cmd->arg >> 9) & 0x1FFFF) == SDIO_CCCR_ABORT)) | |
f95f3850 | 308 | cmdr |= SDMMC_CMD_STOP; |
4a1b27ad JC |
309 | else if (cmd->opcode != MMC_SEND_STATUS && cmd->data) |
310 | cmdr |= SDMMC_CMD_PRV_DAT_WAIT; | |
f95f3850 | 311 | |
01730558 DA |
312 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
313 | u32 clk_en_a; | |
314 | ||
315 | /* Special bit makes CMD11 not die */ | |
316 | cmdr |= SDMMC_CMD_VOLT_SWITCH; | |
317 | ||
318 | /* Change state to continue to handle CMD11 weirdness */ | |
319 | WARN_ON(slot->host->state != STATE_SENDING_CMD); | |
320 | slot->host->state = STATE_SENDING_CMD11; | |
321 | ||
322 | /* | |
323 | * We need to disable low power mode (automatic clock stop) | |
324 | * while doing voltage switch so we don't confuse the card, | |
325 | * since stopping the clock is a specific part of the UHS | |
326 | * voltage change dance. | |
327 | * | |
328 | * Note that low power mode (SDMMC_CLKEN_LOW_PWR) will be | |
329 | * unconditionally turned back on in dw_mci_setup_bus() if it's | |
330 | * ever called with a non-zero clock. That shouldn't happen | |
331 | * until the voltage change is all done. | |
332 | */ | |
333 | clk_en_a = mci_readl(host, CLKENA); | |
334 | clk_en_a &= ~(SDMMC_CLKEN_LOW_PWR << slot->id); | |
335 | mci_writel(host, CLKENA, clk_en_a); | |
336 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
337 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
338 | } | |
339 | ||
f95f3850 WN |
340 | if (cmd->flags & MMC_RSP_PRESENT) { |
341 | /* We expect a response, so set this bit */ | |
342 | cmdr |= SDMMC_CMD_RESP_EXP; | |
343 | if (cmd->flags & MMC_RSP_136) | |
344 | cmdr |= SDMMC_CMD_RESP_LONG; | |
345 | } | |
346 | ||
347 | if (cmd->flags & MMC_RSP_CRC) | |
348 | cmdr |= SDMMC_CMD_RESP_CRC; | |
349 | ||
0349c085 | 350 | if (cmd->data) { |
f95f3850 | 351 | cmdr |= SDMMC_CMD_DAT_EXP; |
0349c085 | 352 | if (cmd->data->flags & MMC_DATA_WRITE) |
f95f3850 WN |
353 | cmdr |= SDMMC_CMD_DAT_WR; |
354 | } | |
355 | ||
aaaaeb7a JC |
356 | if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &slot->flags)) |
357 | cmdr |= SDMMC_CMD_USE_HOLD_REG; | |
800d78bf | 358 | |
f95f3850 WN |
359 | return cmdr; |
360 | } | |
361 | ||
90c2143a SJ |
362 | static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) |
363 | { | |
364 | struct mmc_command *stop; | |
365 | u32 cmdr; | |
366 | ||
367 | if (!cmd->data) | |
368 | return 0; | |
369 | ||
370 | stop = &host->stop_abort; | |
371 | cmdr = cmd->opcode; | |
372 | memset(stop, 0, sizeof(struct mmc_command)); | |
373 | ||
374 | if (cmdr == MMC_READ_SINGLE_BLOCK || | |
375 | cmdr == MMC_READ_MULTIPLE_BLOCK || | |
376 | cmdr == MMC_WRITE_BLOCK || | |
6c2c6506 UH |
377 | cmdr == MMC_WRITE_MULTIPLE_BLOCK || |
378 | cmdr == MMC_SEND_TUNING_BLOCK || | |
379 | cmdr == MMC_SEND_TUNING_BLOCK_HS200) { | |
90c2143a SJ |
380 | stop->opcode = MMC_STOP_TRANSMISSION; |
381 | stop->arg = 0; | |
382 | stop->flags = MMC_RSP_R1B | MMC_CMD_AC; | |
383 | } else if (cmdr == SD_IO_RW_EXTENDED) { | |
384 | stop->opcode = SD_IO_RW_DIRECT; | |
385 | stop->arg |= (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
386 | ((cmd->arg >> 28) & 0x7); | |
387 | stop->flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; | |
388 | } else { | |
389 | return 0; | |
390 | } | |
391 | ||
392 | cmdr = stop->opcode | SDMMC_CMD_STOP | | |
393 | SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; | |
394 | ||
42f989c0 | 395 | if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &host->slot->flags)) |
8c005b40 JC |
396 | cmdr |= SDMMC_CMD_USE_HOLD_REG; |
397 | ||
90c2143a SJ |
398 | return cmdr; |
399 | } | |
400 | ||
03de1921 AK |
401 | static inline void dw_mci_set_cto(struct dw_mci *host) |
402 | { | |
403 | unsigned int cto_clks; | |
4c2357f5 | 404 | unsigned int cto_div; |
03de1921 | 405 | unsigned int cto_ms; |
8892b705 | 406 | unsigned long irqflags; |
03de1921 AK |
407 | |
408 | cto_clks = mci_readl(host, TMOUT) & 0xff; | |
4c2357f5 DA |
409 | cto_div = (mci_readl(host, CLKDIV) & 0xff) * 2; |
410 | if (cto_div == 0) | |
411 | cto_div = 1; | |
412 | cto_ms = DIV_ROUND_UP(MSEC_PER_SEC * cto_clks * cto_div, host->bus_hz); | |
03de1921 AK |
413 | |
414 | /* add a bit spare time */ | |
415 | cto_ms += 10; | |
416 | ||
8892b705 DA |
417 | /* |
418 | * The durations we're working with are fairly short so we have to be | |
419 | * extra careful about synchronization here. Specifically in hardware a | |
420 | * command timeout is _at most_ 5.1 ms, so that means we expect an | |
421 | * interrupt (either command done or timeout) to come rather quickly | |
422 | * after the mci_writel. ...but just in case we have a long interrupt | |
423 | * latency let's add a bit of paranoia. | |
424 | * | |
425 | * In general we'll assume that at least an interrupt will be asserted | |
426 | * in hardware by the time the cto_timer runs. ...and if it hasn't | |
427 | * been asserted in hardware by that time then we'll assume it'll never | |
428 | * come. | |
429 | */ | |
430 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
431 | if (!test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) | |
432 | mod_timer(&host->cto_timer, | |
433 | jiffies + msecs_to_jiffies(cto_ms) + 1); | |
434 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
03de1921 AK |
435 | } |
436 | ||
f95f3850 WN |
437 | static void dw_mci_start_command(struct dw_mci *host, |
438 | struct mmc_command *cmd, u32 cmd_flags) | |
439 | { | |
440 | host->cmd = cmd; | |
4a90920c | 441 | dev_vdbg(host->dev, |
f95f3850 WN |
442 | "start command: ARGR=0x%08x CMDR=0x%08x\n", |
443 | cmd->arg, cmd_flags); | |
444 | ||
445 | mci_writel(host, CMDARG, cmd->arg); | |
0e3a22c0 | 446 | wmb(); /* drain writebuffer */ |
0bdbd0e8 | 447 | dw_mci_wait_while_busy(host, cmd_flags); |
f95f3850 | 448 | |
8892b705 DA |
449 | mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); |
450 | ||
03de1921 AK |
451 | /* response expected command only */ |
452 | if (cmd_flags & SDMMC_CMD_RESP_EXP) | |
453 | dw_mci_set_cto(host); | |
f95f3850 WN |
454 | } |
455 | ||
90c2143a | 456 | static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) |
f95f3850 | 457 | { |
e13c3c08 | 458 | struct mmc_command *stop = &host->stop_abort; |
0e3a22c0 | 459 | |
90c2143a | 460 | dw_mci_start_command(host, stop, host->stop_cmdr); |
f95f3850 WN |
461 | } |
462 | ||
463 | /* DMA interface functions */ | |
464 | static void dw_mci_stop_dma(struct dw_mci *host) | |
465 | { | |
03e8cb53 | 466 | if (host->using_dma) { |
f95f3850 WN |
467 | host->dma_ops->stop(host); |
468 | host->dma_ops->cleanup(host); | |
f95f3850 | 469 | } |
aa50f259 SJ |
470 | |
471 | /* Data transfer was stopped by the interrupt handler */ | |
472 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
f95f3850 WN |
473 | } |
474 | ||
f95f3850 WN |
475 | static void dw_mci_dma_cleanup(struct dw_mci *host) |
476 | { | |
477 | struct mmc_data *data = host->data; | |
478 | ||
a4cc7eb4 JC |
479 | if (data && data->host_cookie == COOKIE_MAPPED) { |
480 | dma_unmap_sg(host->dev, | |
481 | data->sg, | |
482 | data->sg_len, | |
feeef096 | 483 | mmc_get_dma_dir(data)); |
a4cc7eb4 JC |
484 | data->host_cookie = COOKIE_UNMAPPED; |
485 | } | |
f95f3850 WN |
486 | } |
487 | ||
5ce9d961 SJ |
488 | static void dw_mci_idmac_reset(struct dw_mci *host) |
489 | { | |
490 | u32 bmod = mci_readl(host, BMOD); | |
491 | /* Software reset of DMA */ | |
492 | bmod |= SDMMC_IDMAC_SWRESET; | |
493 | mci_writel(host, BMOD, bmod); | |
494 | } | |
495 | ||
f95f3850 WN |
496 | static void dw_mci_idmac_stop_dma(struct dw_mci *host) |
497 | { | |
498 | u32 temp; | |
499 | ||
500 | /* Disable and reset the IDMAC interface */ | |
501 | temp = mci_readl(host, CTRL); | |
502 | temp &= ~SDMMC_CTRL_USE_IDMAC; | |
503 | temp |= SDMMC_CTRL_DMA_RESET; | |
504 | mci_writel(host, CTRL, temp); | |
505 | ||
506 | /* Stop the IDMAC running */ | |
507 | temp = mci_readl(host, BMOD); | |
a5289a43 | 508 | temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); |
5ce9d961 | 509 | temp |= SDMMC_IDMAC_SWRESET; |
f95f3850 WN |
510 | mci_writel(host, BMOD, temp); |
511 | } | |
512 | ||
3fc7eaef | 513 | static void dw_mci_dmac_complete_dma(void *arg) |
f95f3850 | 514 | { |
3fc7eaef | 515 | struct dw_mci *host = arg; |
f95f3850 WN |
516 | struct mmc_data *data = host->data; |
517 | ||
4a90920c | 518 | dev_vdbg(host->dev, "DMA complete\n"); |
f95f3850 | 519 | |
3fc7eaef SL |
520 | if ((host->use_dma == TRANS_MODE_EDMAC) && |
521 | data && (data->flags & MMC_DATA_READ)) | |
522 | /* Invalidate cache after read */ | |
42f989c0 | 523 | dma_sync_sg_for_cpu(mmc_dev(host->slot->mmc), |
3fc7eaef SL |
524 | data->sg, |
525 | data->sg_len, | |
526 | DMA_FROM_DEVICE); | |
527 | ||
f95f3850 WN |
528 | host->dma_ops->cleanup(host); |
529 | ||
530 | /* | |
531 | * If the card was removed, data will be NULL. No point in trying to | |
532 | * send the stop command or waiting for NBUSY in this case. | |
533 | */ | |
534 | if (data) { | |
535 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
536 | tasklet_schedule(&host->tasklet); | |
537 | } | |
538 | } | |
539 | ||
3b2a067b SL |
540 | static int dw_mci_idmac_init(struct dw_mci *host) |
541 | { | |
542 | int i; | |
543 | ||
544 | if (host->dma_64bit_address == 1) { | |
545 | struct idmac_desc_64addr *p; | |
546 | /* Number of descriptors in the ring buffer */ | |
cc190d4c SL |
547 | host->ring_size = |
548 | DESC_RING_BUF_SZ / sizeof(struct idmac_desc_64addr); | |
3b2a067b SL |
549 | |
550 | /* Forward link the descriptor list */ | |
551 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; | |
552 | i++, p++) { | |
553 | p->des6 = (host->sg_dma + | |
554 | (sizeof(struct idmac_desc_64addr) * | |
555 | (i + 1))) & 0xffffffff; | |
556 | ||
557 | p->des7 = (u64)(host->sg_dma + | |
558 | (sizeof(struct idmac_desc_64addr) * | |
559 | (i + 1))) >> 32; | |
560 | /* Initialize reserved and buffer size fields to "0" */ | |
561 | p->des1 = 0; | |
562 | p->des2 = 0; | |
563 | p->des3 = 0; | |
564 | } | |
565 | ||
566 | /* Set the last descriptor as the end-of-ring descriptor */ | |
567 | p->des6 = host->sg_dma & 0xffffffff; | |
568 | p->des7 = (u64)host->sg_dma >> 32; | |
569 | p->des0 = IDMAC_DES0_ER; | |
570 | ||
571 | } else { | |
572 | struct idmac_desc *p; | |
573 | /* Number of descriptors in the ring buffer */ | |
cc190d4c SL |
574 | host->ring_size = |
575 | DESC_RING_BUF_SZ / sizeof(struct idmac_desc); | |
3b2a067b SL |
576 | |
577 | /* Forward link the descriptor list */ | |
578 | for (i = 0, p = host->sg_cpu; | |
579 | i < host->ring_size - 1; | |
580 | i++, p++) { | |
581 | p->des3 = cpu_to_le32(host->sg_dma + | |
582 | (sizeof(struct idmac_desc) * (i + 1))); | |
583 | p->des1 = 0; | |
584 | } | |
585 | ||
586 | /* Set the last descriptor as the end-of-ring descriptor */ | |
587 | p->des3 = cpu_to_le32(host->sg_dma); | |
588 | p->des0 = cpu_to_le32(IDMAC_DES0_ER); | |
589 | } | |
590 | ||
591 | dw_mci_idmac_reset(host); | |
592 | ||
593 | if (host->dma_64bit_address == 1) { | |
594 | /* Mask out interrupts - get Tx & Rx complete only */ | |
595 | mci_writel(host, IDSTS64, IDMAC_INT_CLR); | |
596 | mci_writel(host, IDINTEN64, SDMMC_IDMAC_INT_NI | | |
597 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
598 | ||
599 | /* Set the descriptor base address */ | |
600 | mci_writel(host, DBADDRL, host->sg_dma & 0xffffffff); | |
601 | mci_writel(host, DBADDRU, (u64)host->sg_dma >> 32); | |
602 | ||
603 | } else { | |
604 | /* Mask out interrupts - get Tx & Rx complete only */ | |
605 | mci_writel(host, IDSTS, IDMAC_INT_CLR); | |
606 | mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | | |
607 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
608 | ||
609 | /* Set the descriptor base address */ | |
610 | mci_writel(host, DBADDR, host->sg_dma); | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | static inline int dw_mci_prepare_desc64(struct dw_mci *host, | |
ec0baaa6 SL |
617 | struct mmc_data *data, |
618 | unsigned int sg_len) | |
f95f3850 | 619 | { |
5959b32e | 620 | unsigned int desc_len; |
ec0baaa6 | 621 | struct idmac_desc_64addr *desc_first, *desc_last, *desc; |
b6d2d81c | 622 | u32 val; |
f95f3850 | 623 | int i; |
0e3a22c0 | 624 | |
ec0baaa6 | 625 | desc_first = desc_last = desc = host->sg_cpu; |
5959b32e | 626 | |
ec0baaa6 SL |
627 | for (i = 0; i < sg_len; i++) { |
628 | unsigned int length = sg_dma_len(&data->sg[i]); | |
69d99fdc | 629 | |
ec0baaa6 | 630 | u64 mem_addr = sg_dma_address(&data->sg[i]); |
0e3a22c0 | 631 | |
ec0baaa6 SL |
632 | for ( ; length ; desc++) { |
633 | desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? | |
634 | length : DW_MCI_DESC_DATA_LENGTH; | |
f95f3850 | 635 | |
ec0baaa6 | 636 | length -= desc_len; |
5959b32e | 637 | |
3b2a067b SL |
638 | /* |
639 | * Wait for the former clear OWN bit operation | |
640 | * of IDMAC to make sure that this descriptor | |
641 | * isn't still owned by IDMAC as IDMAC's write | |
642 | * ops and CPU's read ops are asynchronous. | |
643 | */ | |
b6d2d81c SL |
644 | if (readl_poll_timeout_atomic(&desc->des0, val, |
645 | !(val & IDMAC_DES0_OWN), | |
646 | 10, 100 * USEC_PER_MSEC)) | |
647 | goto err_own_bit; | |
3b2a067b | 648 | |
ec0baaa6 SL |
649 | /* |
650 | * Set the OWN bit and disable interrupts | |
651 | * for this descriptor | |
652 | */ | |
653 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | | |
654 | IDMAC_DES0_CH; | |
5959b32e | 655 | |
ec0baaa6 SL |
656 | /* Buffer length */ |
657 | IDMAC_64ADDR_SET_BUFFER1_SIZE(desc, desc_len); | |
5959b32e | 658 | |
ec0baaa6 SL |
659 | /* Physical address to DMA to/from */ |
660 | desc->des4 = mem_addr & 0xffffffff; | |
661 | desc->des5 = mem_addr >> 32; | |
5959b32e | 662 | |
ec0baaa6 SL |
663 | /* Update physical address for the next desc */ |
664 | mem_addr += desc_len; | |
5959b32e | 665 | |
ec0baaa6 SL |
666 | /* Save pointer to the last descriptor */ |
667 | desc_last = desc; | |
69d99fdc | 668 | } |
ec0baaa6 | 669 | } |
f95f3850 | 670 | |
ec0baaa6 SL |
671 | /* Set first descriptor */ |
672 | desc_first->des0 |= IDMAC_DES0_FD; | |
f95f3850 | 673 | |
ec0baaa6 SL |
674 | /* Set last descriptor */ |
675 | desc_last->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); | |
676 | desc_last->des0 |= IDMAC_DES0_LD; | |
3b2a067b SL |
677 | |
678 | return 0; | |
679 | err_own_bit: | |
680 | /* restore the descriptor chain as it's polluted */ | |
26be9d70 | 681 | dev_dbg(host->dev, "descriptor is still owned by IDMAC.\n"); |
cc190d4c | 682 | memset(host->sg_cpu, 0, DESC_RING_BUF_SZ); |
3b2a067b SL |
683 | dw_mci_idmac_init(host); |
684 | return -EINVAL; | |
ec0baaa6 | 685 | } |
5959b32e | 686 | |
69d99fdc | 687 | |
3b2a067b | 688 | static inline int dw_mci_prepare_desc32(struct dw_mci *host, |
ec0baaa6 SL |
689 | struct mmc_data *data, |
690 | unsigned int sg_len) | |
691 | { | |
692 | unsigned int desc_len; | |
693 | struct idmac_desc *desc_first, *desc_last, *desc; | |
b6d2d81c | 694 | u32 val; |
ec0baaa6 | 695 | int i; |
0e3a22c0 | 696 | |
ec0baaa6 | 697 | desc_first = desc_last = desc = host->sg_cpu; |
69d99fdc | 698 | |
ec0baaa6 SL |
699 | for (i = 0; i < sg_len; i++) { |
700 | unsigned int length = sg_dma_len(&data->sg[i]); | |
5959b32e | 701 | |
ec0baaa6 | 702 | u32 mem_addr = sg_dma_address(&data->sg[i]); |
5959b32e | 703 | |
ec0baaa6 SL |
704 | for ( ; length ; desc++) { |
705 | desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? | |
706 | length : DW_MCI_DESC_DATA_LENGTH; | |
5959b32e | 707 | |
ec0baaa6 | 708 | length -= desc_len; |
f95f3850 | 709 | |
3b2a067b SL |
710 | /* |
711 | * Wait for the former clear OWN bit operation | |
712 | * of IDMAC to make sure that this descriptor | |
713 | * isn't still owned by IDMAC as IDMAC's write | |
714 | * ops and CPU's read ops are asynchronous. | |
715 | */ | |
b6d2d81c SL |
716 | if (readl_poll_timeout_atomic(&desc->des0, val, |
717 | IDMAC_OWN_CLR64(val), | |
718 | 10, | |
719 | 100 * USEC_PER_MSEC)) | |
720 | goto err_own_bit; | |
3b2a067b | 721 | |
ec0baaa6 SL |
722 | /* |
723 | * Set the OWN bit and disable interrupts | |
724 | * for this descriptor | |
725 | */ | |
726 | desc->des0 = cpu_to_le32(IDMAC_DES0_OWN | | |
727 | IDMAC_DES0_DIC | | |
728 | IDMAC_DES0_CH); | |
5959b32e | 729 | |
ec0baaa6 SL |
730 | /* Buffer length */ |
731 | IDMAC_SET_BUFFER1_SIZE(desc, desc_len); | |
5959b32e | 732 | |
ec0baaa6 SL |
733 | /* Physical address to DMA to/from */ |
734 | desc->des2 = cpu_to_le32(mem_addr); | |
69d99fdc | 735 | |
ec0baaa6 SL |
736 | /* Update physical address for the next desc */ |
737 | mem_addr += desc_len; | |
f95f3850 | 738 | |
ec0baaa6 SL |
739 | /* Save pointer to the last descriptor */ |
740 | desc_last = desc; | |
741 | } | |
69d99fdc | 742 | } |
f95f3850 | 743 | |
ec0baaa6 SL |
744 | /* Set first descriptor */ |
745 | desc_first->des0 |= cpu_to_le32(IDMAC_DES0_FD); | |
746 | ||
747 | /* Set last descriptor */ | |
748 | desc_last->des0 &= cpu_to_le32(~(IDMAC_DES0_CH | | |
749 | IDMAC_DES0_DIC)); | |
750 | desc_last->des0 |= cpu_to_le32(IDMAC_DES0_LD); | |
3b2a067b SL |
751 | |
752 | return 0; | |
753 | err_own_bit: | |
754 | /* restore the descriptor chain as it's polluted */ | |
26be9d70 | 755 | dev_dbg(host->dev, "descriptor is still owned by IDMAC.\n"); |
cc190d4c | 756 | memset(host->sg_cpu, 0, DESC_RING_BUF_SZ); |
3b2a067b SL |
757 | dw_mci_idmac_init(host); |
758 | return -EINVAL; | |
f95f3850 WN |
759 | } |
760 | ||
3fc7eaef | 761 | static int dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) |
f95f3850 WN |
762 | { |
763 | u32 temp; | |
3b2a067b | 764 | int ret; |
f95f3850 | 765 | |
ec0baaa6 | 766 | if (host->dma_64bit_address == 1) |
3b2a067b | 767 | ret = dw_mci_prepare_desc64(host, host->data, sg_len); |
ec0baaa6 | 768 | else |
3b2a067b SL |
769 | ret = dw_mci_prepare_desc32(host, host->data, sg_len); |
770 | ||
771 | if (ret) | |
772 | goto out; | |
ec0baaa6 SL |
773 | |
774 | /* drain writebuffer */ | |
775 | wmb(); | |
f95f3850 | 776 | |
536f6b91 SR |
777 | /* Make sure to reset DMA in case we did PIO before this */ |
778 | dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET); | |
779 | dw_mci_idmac_reset(host); | |
780 | ||
f95f3850 WN |
781 | /* Select IDMAC interface */ |
782 | temp = mci_readl(host, CTRL); | |
783 | temp |= SDMMC_CTRL_USE_IDMAC; | |
784 | mci_writel(host, CTRL, temp); | |
785 | ||
0e3a22c0 | 786 | /* drain writebuffer */ |
f95f3850 WN |
787 | wmb(); |
788 | ||
789 | /* Enable the IDMAC */ | |
790 | temp = mci_readl(host, BMOD); | |
a5289a43 | 791 | temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; |
f95f3850 WN |
792 | mci_writel(host, BMOD, temp); |
793 | ||
794 | /* Start it running */ | |
795 | mci_writel(host, PLDMND, 1); | |
3fc7eaef | 796 | |
3b2a067b SL |
797 | out: |
798 | return ret; | |
f95f3850 WN |
799 | } |
800 | ||
8e2b36ea | 801 | static const struct dw_mci_dma_ops dw_mci_idmac_ops = { |
885c3e80 SJ |
802 | .init = dw_mci_idmac_init, |
803 | .start = dw_mci_idmac_start_dma, | |
804 | .stop = dw_mci_idmac_stop_dma, | |
3fc7eaef SL |
805 | .complete = dw_mci_dmac_complete_dma, |
806 | .cleanup = dw_mci_dma_cleanup, | |
807 | }; | |
808 | ||
809 | static void dw_mci_edmac_stop_dma(struct dw_mci *host) | |
810 | { | |
ab925a31 | 811 | dmaengine_terminate_async(host->dms->ch); |
3fc7eaef SL |
812 | } |
813 | ||
814 | static int dw_mci_edmac_start_dma(struct dw_mci *host, | |
815 | unsigned int sg_len) | |
816 | { | |
817 | struct dma_slave_config cfg; | |
818 | struct dma_async_tx_descriptor *desc = NULL; | |
819 | struct scatterlist *sgl = host->data->sg; | |
27d70d36 | 820 | static const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; |
3fc7eaef SL |
821 | u32 sg_elems = host->data->sg_len; |
822 | u32 fifoth_val; | |
823 | u32 fifo_offset = host->fifo_reg - host->regs; | |
824 | int ret = 0; | |
825 | ||
826 | /* Set external dma config: burst size, burst width */ | |
260b3164 | 827 | cfg.dst_addr = host->phy_regs + fifo_offset; |
3fc7eaef SL |
828 | cfg.src_addr = cfg.dst_addr; |
829 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
830 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
831 | ||
832 | /* Match burst msize with external dma config */ | |
833 | fifoth_val = mci_readl(host, FIFOTH); | |
834 | cfg.dst_maxburst = mszs[(fifoth_val >> 28) & 0x7]; | |
835 | cfg.src_maxburst = cfg.dst_maxburst; | |
836 | ||
837 | if (host->data->flags & MMC_DATA_WRITE) | |
838 | cfg.direction = DMA_MEM_TO_DEV; | |
839 | else | |
840 | cfg.direction = DMA_DEV_TO_MEM; | |
841 | ||
842 | ret = dmaengine_slave_config(host->dms->ch, &cfg); | |
843 | if (ret) { | |
844 | dev_err(host->dev, "Failed to config edmac.\n"); | |
845 | return -EBUSY; | |
846 | } | |
847 | ||
848 | desc = dmaengine_prep_slave_sg(host->dms->ch, sgl, | |
849 | sg_len, cfg.direction, | |
850 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
851 | if (!desc) { | |
852 | dev_err(host->dev, "Can't prepare slave sg.\n"); | |
853 | return -EBUSY; | |
854 | } | |
855 | ||
856 | /* Set dw_mci_dmac_complete_dma as callback */ | |
857 | desc->callback = dw_mci_dmac_complete_dma; | |
858 | desc->callback_param = (void *)host; | |
859 | dmaengine_submit(desc); | |
860 | ||
861 | /* Flush cache before write */ | |
862 | if (host->data->flags & MMC_DATA_WRITE) | |
42f989c0 | 863 | dma_sync_sg_for_device(mmc_dev(host->slot->mmc), sgl, |
3fc7eaef SL |
864 | sg_elems, DMA_TO_DEVICE); |
865 | ||
866 | dma_async_issue_pending(host->dms->ch); | |
867 | ||
868 | return 0; | |
869 | } | |
870 | ||
871 | static int dw_mci_edmac_init(struct dw_mci *host) | |
872 | { | |
873 | /* Request external dma channel */ | |
874 | host->dms = kzalloc(sizeof(struct dw_mci_dma_slave), GFP_KERNEL); | |
875 | if (!host->dms) | |
876 | return -ENOMEM; | |
877 | ||
878 | host->dms->ch = dma_request_slave_channel(host->dev, "rx-tx"); | |
879 | if (!host->dms->ch) { | |
4539d36e | 880 | dev_err(host->dev, "Failed to get external DMA channel.\n"); |
3fc7eaef SL |
881 | kfree(host->dms); |
882 | host->dms = NULL; | |
883 | return -ENXIO; | |
884 | } | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
889 | static void dw_mci_edmac_exit(struct dw_mci *host) | |
890 | { | |
891 | if (host->dms) { | |
892 | if (host->dms->ch) { | |
893 | dma_release_channel(host->dms->ch); | |
894 | host->dms->ch = NULL; | |
895 | } | |
896 | kfree(host->dms); | |
897 | host->dms = NULL; | |
898 | } | |
899 | } | |
900 | ||
901 | static const struct dw_mci_dma_ops dw_mci_edmac_ops = { | |
902 | .init = dw_mci_edmac_init, | |
903 | .exit = dw_mci_edmac_exit, | |
904 | .start = dw_mci_edmac_start_dma, | |
905 | .stop = dw_mci_edmac_stop_dma, | |
906 | .complete = dw_mci_dmac_complete_dma, | |
885c3e80 SJ |
907 | .cleanup = dw_mci_dma_cleanup, |
908 | }; | |
885c3e80 | 909 | |
9aa51408 SJ |
910 | static int dw_mci_pre_dma_transfer(struct dw_mci *host, |
911 | struct mmc_data *data, | |
a4cc7eb4 | 912 | int cookie) |
f95f3850 WN |
913 | { |
914 | struct scatterlist *sg; | |
9aa51408 | 915 | unsigned int i, sg_len; |
03e8cb53 | 916 | |
a4cc7eb4 JC |
917 | if (data->host_cookie == COOKIE_PRE_MAPPED) |
918 | return data->sg_len; | |
f95f3850 WN |
919 | |
920 | /* | |
921 | * We don't do DMA on "complex" transfers, i.e. with | |
922 | * non-word-aligned buffers or lengths. Also, we don't bother | |
923 | * with all the DMA setup overhead for short transfers. | |
924 | */ | |
925 | if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) | |
926 | return -EINVAL; | |
9aa51408 | 927 | |
f95f3850 WN |
928 | if (data->blksz & 3) |
929 | return -EINVAL; | |
930 | ||
931 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
932 | if (sg->offset & 3 || sg->length & 3) | |
933 | return -EINVAL; | |
934 | } | |
935 | ||
4a90920c | 936 | sg_len = dma_map_sg(host->dev, |
9aa51408 SJ |
937 | data->sg, |
938 | data->sg_len, | |
feeef096 | 939 | mmc_get_dma_dir(data)); |
9aa51408 SJ |
940 | if (sg_len == 0) |
941 | return -EINVAL; | |
03e8cb53 | 942 | |
a4cc7eb4 | 943 | data->host_cookie = cookie; |
f95f3850 | 944 | |
9aa51408 SJ |
945 | return sg_len; |
946 | } | |
947 | ||
9aa51408 | 948 | static void dw_mci_pre_req(struct mmc_host *mmc, |
d3c6aac3 | 949 | struct mmc_request *mrq) |
9aa51408 SJ |
950 | { |
951 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
952 | struct mmc_data *data = mrq->data; | |
953 | ||
954 | if (!slot->host->use_dma || !data) | |
955 | return; | |
956 | ||
a4cc7eb4 JC |
957 | /* This data might be unmapped at this time */ |
958 | data->host_cookie = COOKIE_UNMAPPED; | |
9aa51408 | 959 | |
a4cc7eb4 JC |
960 | if (dw_mci_pre_dma_transfer(slot->host, mrq->data, |
961 | COOKIE_PRE_MAPPED) < 0) | |
962 | data->host_cookie = COOKIE_UNMAPPED; | |
9aa51408 SJ |
963 | } |
964 | ||
965 | static void dw_mci_post_req(struct mmc_host *mmc, | |
966 | struct mmc_request *mrq, | |
967 | int err) | |
968 | { | |
969 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
970 | struct mmc_data *data = mrq->data; | |
971 | ||
972 | if (!slot->host->use_dma || !data) | |
973 | return; | |
974 | ||
a4cc7eb4 | 975 | if (data->host_cookie != COOKIE_UNMAPPED) |
4a90920c | 976 | dma_unmap_sg(slot->host->dev, |
9aa51408 SJ |
977 | data->sg, |
978 | data->sg_len, | |
feeef096 | 979 | mmc_get_dma_dir(data)); |
a4cc7eb4 | 980 | data->host_cookie = COOKIE_UNMAPPED; |
9aa51408 SJ |
981 | } |
982 | ||
671fa142 SL |
983 | static int dw_mci_get_cd(struct mmc_host *mmc) |
984 | { | |
985 | int present; | |
986 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
987 | struct dw_mci *host = slot->host; | |
988 | int gpio_cd = mmc_gpio_get_cd(mmc); | |
989 | ||
990 | /* Use platform get_cd function, else try onboard card detect */ | |
991 | if (((mmc->caps & MMC_CAP_NEEDS_POLL) | |
992 | || !mmc_card_is_removable(mmc))) { | |
993 | present = 1; | |
994 | ||
995 | if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { | |
996 | if (mmc->caps & MMC_CAP_NEEDS_POLL) { | |
997 | dev_info(&mmc->class_dev, | |
998 | "card is polling.\n"); | |
999 | } else { | |
1000 | dev_info(&mmc->class_dev, | |
1001 | "card is non-removable.\n"); | |
1002 | } | |
1003 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
1004 | } | |
1005 | ||
1006 | return present; | |
1007 | } else if (gpio_cd >= 0) | |
1008 | present = gpio_cd; | |
1009 | else | |
1010 | present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) | |
1011 | == 0 ? 1 : 0; | |
1012 | ||
1013 | spin_lock_bh(&host->lock); | |
1014 | if (present && !test_and_set_bit(DW_MMC_CARD_PRESENT, &slot->flags)) | |
1015 | dev_dbg(&mmc->class_dev, "card is present\n"); | |
1016 | else if (!present && | |
1017 | !test_and_clear_bit(DW_MMC_CARD_PRESENT, &slot->flags)) | |
1018 | dev_dbg(&mmc->class_dev, "card is not present\n"); | |
1019 | spin_unlock_bh(&host->lock); | |
1020 | ||
1021 | return present; | |
1022 | } | |
1023 | ||
52426899 SJ |
1024 | static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) |
1025 | { | |
52426899 | 1026 | unsigned int blksz = data->blksz; |
27d70d36 | 1027 | static const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; |
52426899 SJ |
1028 | u32 fifo_width = 1 << host->data_shift; |
1029 | u32 blksz_depth = blksz / fifo_width, fifoth_val; | |
1030 | u32 msize = 0, rx_wmark = 1, tx_wmark, tx_wmark_invers; | |
0e3a22c0 | 1031 | int idx = ARRAY_SIZE(mszs) - 1; |
52426899 | 1032 | |
3fc7eaef SL |
1033 | /* pio should ship this scenario */ |
1034 | if (!host->use_dma) | |
1035 | return; | |
1036 | ||
52426899 SJ |
1037 | tx_wmark = (host->fifo_depth) / 2; |
1038 | tx_wmark_invers = host->fifo_depth - tx_wmark; | |
1039 | ||
1040 | /* | |
1041 | * MSIZE is '1', | |
1042 | * if blksz is not a multiple of the FIFO width | |
1043 | */ | |
20753569 | 1044 | if (blksz % fifo_width) |
52426899 | 1045 | goto done; |
52426899 SJ |
1046 | |
1047 | do { | |
1048 | if (!((blksz_depth % mszs[idx]) || | |
1049 | (tx_wmark_invers % mszs[idx]))) { | |
1050 | msize = idx; | |
1051 | rx_wmark = mszs[idx] - 1; | |
1052 | break; | |
1053 | } | |
1054 | } while (--idx > 0); | |
1055 | /* | |
1056 | * If idx is '0', it won't be tried | |
1057 | * Thus, initial values are uesed | |
1058 | */ | |
1059 | done: | |
1060 | fifoth_val = SDMMC_SET_FIFOTH(msize, rx_wmark, tx_wmark); | |
1061 | mci_writel(host, FIFOTH, fifoth_val); | |
52426899 SJ |
1062 | } |
1063 | ||
7e4bf1bc | 1064 | static void dw_mci_ctrl_thld(struct dw_mci *host, struct mmc_data *data) |
f1d2736c SJ |
1065 | { |
1066 | unsigned int blksz = data->blksz; | |
1067 | u32 blksz_depth, fifo_depth; | |
1068 | u16 thld_size; | |
7e4bf1bc | 1069 | u8 enable; |
f1d2736c | 1070 | |
66dfd101 JH |
1071 | /* |
1072 | * CDTHRCTL doesn't exist prior to 240A (in fact that register offset is | |
1073 | * in the FIFO region, so we really shouldn't access it). | |
1074 | */ | |
7e4bf1bc JC |
1075 | if (host->verid < DW_MMC_240A || |
1076 | (host->verid < DW_MMC_280A && data->flags & MMC_DATA_WRITE)) | |
1077 | return; | |
1078 | ||
1079 | /* | |
1080 | * Card write Threshold is introduced since 2.80a | |
1081 | * It's used when HS400 mode is enabled. | |
1082 | */ | |
1083 | if (data->flags & MMC_DATA_WRITE && | |
1084 | !(host->timing != MMC_TIMING_MMC_HS400)) | |
66dfd101 JH |
1085 | return; |
1086 | ||
7e4bf1bc JC |
1087 | if (data->flags & MMC_DATA_WRITE) |
1088 | enable = SDMMC_CARD_WR_THR_EN; | |
1089 | else | |
1090 | enable = SDMMC_CARD_RD_THR_EN; | |
1091 | ||
f1d2736c SJ |
1092 | if (host->timing != MMC_TIMING_MMC_HS200 && |
1093 | host->timing != MMC_TIMING_UHS_SDR104) | |
1094 | goto disable; | |
1095 | ||
1096 | blksz_depth = blksz / (1 << host->data_shift); | |
1097 | fifo_depth = host->fifo_depth; | |
1098 | ||
1099 | if (blksz_depth > fifo_depth) | |
1100 | goto disable; | |
1101 | ||
1102 | /* | |
1103 | * If (blksz_depth) >= (fifo_depth >> 1), should be 'thld_size <= blksz' | |
1104 | * If (blksz_depth) < (fifo_depth >> 1), should be thld_size = blksz | |
1105 | * Currently just choose blksz. | |
1106 | */ | |
1107 | thld_size = blksz; | |
7e4bf1bc | 1108 | mci_writel(host, CDTHRCTL, SDMMC_SET_THLD(thld_size, enable)); |
f1d2736c SJ |
1109 | return; |
1110 | ||
1111 | disable: | |
7e4bf1bc | 1112 | mci_writel(host, CDTHRCTL, 0); |
f1d2736c SJ |
1113 | } |
1114 | ||
9aa51408 SJ |
1115 | static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) |
1116 | { | |
f8c58c11 | 1117 | unsigned long irqflags; |
9aa51408 SJ |
1118 | int sg_len; |
1119 | u32 temp; | |
1120 | ||
1121 | host->using_dma = 0; | |
1122 | ||
1123 | /* If we don't have a channel, we can't do DMA */ | |
1124 | if (!host->use_dma) | |
1125 | return -ENODEV; | |
1126 | ||
a4cc7eb4 | 1127 | sg_len = dw_mci_pre_dma_transfer(host, data, COOKIE_MAPPED); |
a99aa9b9 SJ |
1128 | if (sg_len < 0) { |
1129 | host->dma_ops->stop(host); | |
9aa51408 | 1130 | return sg_len; |
a99aa9b9 | 1131 | } |
9aa51408 SJ |
1132 | |
1133 | host->using_dma = 1; | |
f95f3850 | 1134 | |
3fc7eaef SL |
1135 | if (host->use_dma == TRANS_MODE_IDMAC) |
1136 | dev_vdbg(host->dev, | |
1137 | "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", | |
1138 | (unsigned long)host->sg_cpu, | |
1139 | (unsigned long)host->sg_dma, | |
1140 | sg_len); | |
f95f3850 | 1141 | |
52426899 SJ |
1142 | /* |
1143 | * Decide the MSIZE and RX/TX Watermark. | |
1144 | * If current block size is same with previous size, | |
1145 | * no need to update fifoth. | |
1146 | */ | |
1147 | if (host->prev_blksz != data->blksz) | |
1148 | dw_mci_adjust_fifoth(host, data); | |
1149 | ||
f95f3850 WN |
1150 | /* Enable the DMA interface */ |
1151 | temp = mci_readl(host, CTRL); | |
1152 | temp |= SDMMC_CTRL_DMA_ENABLE; | |
1153 | mci_writel(host, CTRL, temp); | |
1154 | ||
1155 | /* Disable RX/TX IRQs, let DMA handle it */ | |
f8c58c11 | 1156 | spin_lock_irqsave(&host->irq_lock, irqflags); |
f95f3850 WN |
1157 | temp = mci_readl(host, INTMASK); |
1158 | temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); | |
1159 | mci_writel(host, INTMASK, temp); | |
f8c58c11 | 1160 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
f95f3850 | 1161 | |
3fc7eaef | 1162 | if (host->dma_ops->start(host, sg_len)) { |
647f80a1 | 1163 | host->dma_ops->stop(host); |
d12d0cb1 SL |
1164 | /* We can't do DMA, try PIO for this one */ |
1165 | dev_dbg(host->dev, | |
1166 | "%s: fall back to PIO mode for current transfer\n", | |
1167 | __func__); | |
3fc7eaef SL |
1168 | return -ENODEV; |
1169 | } | |
f95f3850 WN |
1170 | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) | |
1175 | { | |
f8c58c11 | 1176 | unsigned long irqflags; |
0e3a22c0 | 1177 | int flags = SG_MITER_ATOMIC; |
f95f3850 WN |
1178 | u32 temp; |
1179 | ||
1180 | data->error = -EINPROGRESS; | |
1181 | ||
1182 | WARN_ON(host->data); | |
1183 | host->sg = NULL; | |
1184 | host->data = data; | |
1185 | ||
7e4bf1bc | 1186 | if (data->flags & MMC_DATA_READ) |
55c5efbc | 1187 | host->dir_status = DW_MCI_RECV_STATUS; |
7e4bf1bc | 1188 | else |
55c5efbc | 1189 | host->dir_status = DW_MCI_SEND_STATUS; |
7e4bf1bc JC |
1190 | |
1191 | dw_mci_ctrl_thld(host, data); | |
55c5efbc | 1192 | |
f95f3850 | 1193 | if (dw_mci_submit_data_dma(host, data)) { |
f9c2a0dc SJ |
1194 | if (host->data->flags & MMC_DATA_READ) |
1195 | flags |= SG_MITER_TO_SG; | |
1196 | else | |
1197 | flags |= SG_MITER_FROM_SG; | |
1198 | ||
1199 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
f95f3850 | 1200 | host->sg = data->sg; |
34b664a2 JH |
1201 | host->part_buf_start = 0; |
1202 | host->part_buf_count = 0; | |
f95f3850 | 1203 | |
b40af3aa | 1204 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); |
f8c58c11 DA |
1205 | |
1206 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
f95f3850 WN |
1207 | temp = mci_readl(host, INTMASK); |
1208 | temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; | |
1209 | mci_writel(host, INTMASK, temp); | |
f8c58c11 | 1210 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
f95f3850 WN |
1211 | |
1212 | temp = mci_readl(host, CTRL); | |
1213 | temp &= ~SDMMC_CTRL_DMA_ENABLE; | |
1214 | mci_writel(host, CTRL, temp); | |
52426899 SJ |
1215 | |
1216 | /* | |
d6fced83 JN |
1217 | * Use the initial fifoth_val for PIO mode. If wm_algined |
1218 | * is set, we set watermark same as data size. | |
52426899 SJ |
1219 | * If next issued data may be transfered by DMA mode, |
1220 | * prev_blksz should be invalidated. | |
1221 | */ | |
d6fced83 JN |
1222 | if (host->wm_aligned) |
1223 | dw_mci_adjust_fifoth(host, data); | |
1224 | else | |
1225 | mci_writel(host, FIFOTH, host->fifoth_val); | |
52426899 SJ |
1226 | host->prev_blksz = 0; |
1227 | } else { | |
1228 | /* | |
1229 | * Keep the current block size. | |
1230 | * It will be used to decide whether to update | |
1231 | * fifoth register next time. | |
1232 | */ | |
1233 | host->prev_blksz = data->blksz; | |
f95f3850 WN |
1234 | } |
1235 | } | |
1236 | ||
ab269128 | 1237 | static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) |
f95f3850 WN |
1238 | { |
1239 | struct dw_mci *host = slot->host; | |
fdf492a1 | 1240 | unsigned int clock = slot->clock; |
f95f3850 | 1241 | u32 div; |
9623b5b9 | 1242 | u32 clk_en_a; |
01730558 DA |
1243 | u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT; |
1244 | ||
1245 | /* We must continue to set bit 28 in CMD until the change is complete */ | |
1246 | if (host->state == STATE_WAITING_CMD11_DONE) | |
1247 | sdmmc_cmd_bits |= SDMMC_CMD_VOLT_SWITCH; | |
f95f3850 | 1248 | |
fdf492a1 DA |
1249 | if (!clock) { |
1250 | mci_writel(host, CLKENA, 0); | |
01730558 | 1251 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
fdf492a1 DA |
1252 | } else if (clock != host->current_speed || force_clkinit) { |
1253 | div = host->bus_hz / clock; | |
1254 | if (host->bus_hz % clock && host->bus_hz > clock) | |
f95f3850 WN |
1255 | /* |
1256 | * move the + 1 after the divide to prevent | |
1257 | * over-clocking the card. | |
1258 | */ | |
e419990b SJ |
1259 | div += 1; |
1260 | ||
fdf492a1 | 1261 | div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; |
f95f3850 | 1262 | |
e6cd7a8e JC |
1263 | if ((clock != slot->__clk_old && |
1264 | !test_bit(DW_MMC_CARD_NEEDS_POLL, &slot->flags)) || | |
1265 | force_clkinit) { | |
ce69e2fe SL |
1266 | /* Silent the verbose log if calling from PM context */ |
1267 | if (!force_clkinit) | |
1268 | dev_info(&slot->mmc->class_dev, | |
1269 | "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", | |
1270 | slot->id, host->bus_hz, clock, | |
1271 | div ? ((host->bus_hz / div) >> 1) : | |
1272 | host->bus_hz, div); | |
f95f3850 | 1273 | |
e6cd7a8e JC |
1274 | /* |
1275 | * If card is polling, display the message only | |
1276 | * one time at boot time. | |
1277 | */ | |
1278 | if (slot->mmc->caps & MMC_CAP_NEEDS_POLL && | |
1279 | slot->mmc->f_min == clock) | |
1280 | set_bit(DW_MMC_CARD_NEEDS_POLL, &slot->flags); | |
1281 | } | |
1282 | ||
f95f3850 WN |
1283 | /* disable clock */ |
1284 | mci_writel(host, CLKENA, 0); | |
1285 | mci_writel(host, CLKSRC, 0); | |
1286 | ||
1287 | /* inform CIU */ | |
01730558 | 1288 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 WN |
1289 | |
1290 | /* set clock to desired speed */ | |
1291 | mci_writel(host, CLKDIV, div); | |
1292 | ||
1293 | /* inform CIU */ | |
01730558 | 1294 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 | 1295 | |
9623b5b9 DA |
1296 | /* enable clock; only low power if no SDIO */ |
1297 | clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; | |
b24c8b26 | 1298 | if (!test_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags)) |
9623b5b9 DA |
1299 | clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; |
1300 | mci_writel(host, CLKENA, clk_en_a); | |
f95f3850 WN |
1301 | |
1302 | /* inform CIU */ | |
01730558 | 1303 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
005d675a JC |
1304 | |
1305 | /* keep the last clock value that was requested from core */ | |
1306 | slot->__clk_old = clock; | |
f95f3850 WN |
1307 | } |
1308 | ||
fdf492a1 DA |
1309 | host->current_speed = clock; |
1310 | ||
f95f3850 | 1311 | /* Set the current slot bus width */ |
1d56c453 | 1312 | mci_writel(host, CTYPE, (slot->ctype << slot->id)); |
f95f3850 WN |
1313 | } |
1314 | ||
053b3ce6 SJ |
1315 | static void __dw_mci_start_request(struct dw_mci *host, |
1316 | struct dw_mci_slot *slot, | |
1317 | struct mmc_command *cmd) | |
f95f3850 WN |
1318 | { |
1319 | struct mmc_request *mrq; | |
f95f3850 WN |
1320 | struct mmc_data *data; |
1321 | u32 cmdflags; | |
1322 | ||
1323 | mrq = slot->mrq; | |
f95f3850 | 1324 | |
f95f3850 WN |
1325 | host->mrq = mrq; |
1326 | ||
1327 | host->pending_events = 0; | |
1328 | host->completed_events = 0; | |
e352c813 | 1329 | host->cmd_status = 0; |
f95f3850 | 1330 | host->data_status = 0; |
e352c813 | 1331 | host->dir_status = 0; |
f95f3850 | 1332 | |
053b3ce6 | 1333 | data = cmd->data; |
f95f3850 | 1334 | if (data) { |
f16afa88 | 1335 | mci_writel(host, TMOUT, 0xFFFFFFFF); |
f95f3850 WN |
1336 | mci_writel(host, BYTCNT, data->blksz*data->blocks); |
1337 | mci_writel(host, BLKSIZ, data->blksz); | |
1338 | } | |
1339 | ||
f95f3850 WN |
1340 | cmdflags = dw_mci_prepare_command(slot->mmc, cmd); |
1341 | ||
1342 | /* this is the first command, send the initialization clock */ | |
1343 | if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) | |
1344 | cmdflags |= SDMMC_CMD_INIT; | |
1345 | ||
1346 | if (data) { | |
1347 | dw_mci_submit_data(host, data); | |
0e3a22c0 | 1348 | wmb(); /* drain writebuffer */ |
f95f3850 WN |
1349 | } |
1350 | ||
1351 | dw_mci_start_command(host, cmd, cmdflags); | |
1352 | ||
5c935165 | 1353 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
49ba0302 DA |
1354 | unsigned long irqflags; |
1355 | ||
5c935165 | 1356 | /* |
8886a6fd DA |
1357 | * Databook says to fail after 2ms w/ no response, but evidence |
1358 | * shows that sometimes the cmd11 interrupt takes over 130ms. | |
1359 | * We'll set to 500ms, plus an extra jiffy just in case jiffies | |
1360 | * is just about to roll over. | |
49ba0302 DA |
1361 | * |
1362 | * We do this whole thing under spinlock and only if the | |
1363 | * command hasn't already completed (indicating the the irq | |
1364 | * already ran so we don't want the timeout). | |
5c935165 | 1365 | */ |
49ba0302 DA |
1366 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1367 | if (!test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) | |
1368 | mod_timer(&host->cmd11_timer, | |
1369 | jiffies + msecs_to_jiffies(500) + 1); | |
1370 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
5c935165 DA |
1371 | } |
1372 | ||
e13c3c08 | 1373 | host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); |
f95f3850 WN |
1374 | } |
1375 | ||
053b3ce6 SJ |
1376 | static void dw_mci_start_request(struct dw_mci *host, |
1377 | struct dw_mci_slot *slot) | |
1378 | { | |
1379 | struct mmc_request *mrq = slot->mrq; | |
1380 | struct mmc_command *cmd; | |
1381 | ||
1382 | cmd = mrq->sbc ? mrq->sbc : mrq->cmd; | |
1383 | __dw_mci_start_request(host, slot, cmd); | |
1384 | } | |
1385 | ||
7456caae | 1386 | /* must be called with host->lock held */ |
f95f3850 WN |
1387 | static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, |
1388 | struct mmc_request *mrq) | |
1389 | { | |
1390 | dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", | |
1391 | host->state); | |
1392 | ||
f95f3850 WN |
1393 | slot->mrq = mrq; |
1394 | ||
01730558 DA |
1395 | if (host->state == STATE_WAITING_CMD11_DONE) { |
1396 | dev_warn(&slot->mmc->class_dev, | |
1397 | "Voltage change didn't complete\n"); | |
1398 | /* | |
1399 | * this case isn't expected to happen, so we can | |
1400 | * either crash here or just try to continue on | |
1401 | * in the closest possible state | |
1402 | */ | |
1403 | host->state = STATE_IDLE; | |
1404 | } | |
1405 | ||
f95f3850 WN |
1406 | if (host->state == STATE_IDLE) { |
1407 | host->state = STATE_SENDING_CMD; | |
1408 | dw_mci_start_request(host, slot); | |
1409 | } else { | |
1410 | list_add_tail(&slot->queue_node, &host->queue); | |
1411 | } | |
f95f3850 WN |
1412 | } |
1413 | ||
1414 | static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1415 | { | |
1416 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1417 | struct dw_mci *host = slot->host; | |
1418 | ||
1419 | WARN_ON(slot->mrq); | |
1420 | ||
7456caae JH |
1421 | /* |
1422 | * The check for card presence and queueing of the request must be | |
1423 | * atomic, otherwise the card could be removed in between and the | |
1424 | * request wouldn't fail until another card was inserted. | |
1425 | */ | |
7456caae | 1426 | |
56f6911c | 1427 | if (!dw_mci_get_cd(mmc)) { |
f95f3850 WN |
1428 | mrq->cmd->error = -ENOMEDIUM; |
1429 | mmc_request_done(mmc, mrq); | |
1430 | return; | |
1431 | } | |
1432 | ||
56f6911c SL |
1433 | spin_lock_bh(&host->lock); |
1434 | ||
f95f3850 | 1435 | dw_mci_queue_request(host, slot, mrq); |
7456caae JH |
1436 | |
1437 | spin_unlock_bh(&host->lock); | |
f95f3850 WN |
1438 | } |
1439 | ||
1440 | static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1441 | { | |
1442 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
e95baf13 | 1443 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
41babf75 | 1444 | u32 regs; |
51da2240 | 1445 | int ret; |
f95f3850 | 1446 | |
f95f3850 | 1447 | switch (ios->bus_width) { |
f95f3850 WN |
1448 | case MMC_BUS_WIDTH_4: |
1449 | slot->ctype = SDMMC_CTYPE_4BIT; | |
1450 | break; | |
c9b2a06f JC |
1451 | case MMC_BUS_WIDTH_8: |
1452 | slot->ctype = SDMMC_CTYPE_8BIT; | |
1453 | break; | |
b2f7cb45 JC |
1454 | default: |
1455 | /* set default 1 bit mode */ | |
1456 | slot->ctype = SDMMC_CTYPE_1BIT; | |
f95f3850 WN |
1457 | } |
1458 | ||
3f514291 SJ |
1459 | regs = mci_readl(slot->host, UHS_REG); |
1460 | ||
41babf75 | 1461 | /* DDR mode set */ |
80113132 | 1462 | if (ios->timing == MMC_TIMING_MMC_DDR52 || |
7cc8d580 | 1463 | ios->timing == MMC_TIMING_UHS_DDR50 || |
80113132 | 1464 | ios->timing == MMC_TIMING_MMC_HS400) |
c69042a5 | 1465 | regs |= ((0x1 << slot->id) << 16); |
3f514291 | 1466 | else |
c69042a5 | 1467 | regs &= ~((0x1 << slot->id) << 16); |
3f514291 SJ |
1468 | |
1469 | mci_writel(slot->host, UHS_REG, regs); | |
f1d2736c | 1470 | slot->host->timing = ios->timing; |
41babf75 | 1471 | |
fdf492a1 DA |
1472 | /* |
1473 | * Use mirror of ios->clock to prevent race with mmc | |
1474 | * core ios update when finding the minimum. | |
1475 | */ | |
1476 | slot->clock = ios->clock; | |
f95f3850 | 1477 | |
cb27a843 JH |
1478 | if (drv_data && drv_data->set_ios) |
1479 | drv_data->set_ios(slot->host, ios); | |
800d78bf | 1480 | |
f95f3850 WN |
1481 | switch (ios->power_mode) { |
1482 | case MMC_POWER_UP: | |
51da2240 YC |
1483 | if (!IS_ERR(mmc->supply.vmmc)) { |
1484 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, | |
1485 | ios->vdd); | |
1486 | if (ret) { | |
1487 | dev_err(slot->host->dev, | |
1488 | "failed to enable vmmc regulator\n"); | |
1489 | /*return, if failed turn on vmmc*/ | |
1490 | return; | |
1491 | } | |
1492 | } | |
29d0d161 DA |
1493 | set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); |
1494 | regs = mci_readl(slot->host, PWREN); | |
1495 | regs |= (1 << slot->id); | |
1496 | mci_writel(slot->host, PWREN, regs); | |
1497 | break; | |
1498 | case MMC_POWER_ON: | |
d1f1dd86 DA |
1499 | if (!slot->host->vqmmc_enabled) { |
1500 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
1501 | ret = regulator_enable(mmc->supply.vqmmc); | |
1502 | if (ret < 0) | |
1503 | dev_err(slot->host->dev, | |
1504 | "failed to enable vqmmc\n"); | |
1505 | else | |
1506 | slot->host->vqmmc_enabled = true; | |
1507 | ||
1508 | } else { | |
1509 | /* Keep track so we don't reset again */ | |
51da2240 | 1510 | slot->host->vqmmc_enabled = true; |
d1f1dd86 DA |
1511 | } |
1512 | ||
1513 | /* Reset our state machine after powering on */ | |
1514 | dw_mci_ctrl_reset(slot->host, | |
1515 | SDMMC_CTRL_ALL_RESET_FLAGS); | |
51da2240 | 1516 | } |
655babbd DA |
1517 | |
1518 | /* Adjust clock / bus width after power is up */ | |
1519 | dw_mci_setup_bus(slot, false); | |
1520 | ||
e6f34e2f JH |
1521 | break; |
1522 | case MMC_POWER_OFF: | |
655babbd DA |
1523 | /* Turn clock off before power goes down */ |
1524 | dw_mci_setup_bus(slot, false); | |
1525 | ||
51da2240 YC |
1526 | if (!IS_ERR(mmc->supply.vmmc)) |
1527 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
1528 | ||
d1f1dd86 | 1529 | if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) |
51da2240 | 1530 | regulator_disable(mmc->supply.vqmmc); |
d1f1dd86 | 1531 | slot->host->vqmmc_enabled = false; |
51da2240 | 1532 | |
4366dcc5 JC |
1533 | regs = mci_readl(slot->host, PWREN); |
1534 | regs &= ~(1 << slot->id); | |
1535 | mci_writel(slot->host, PWREN, regs); | |
f95f3850 WN |
1536 | break; |
1537 | default: | |
1538 | break; | |
1539 | } | |
655babbd DA |
1540 | |
1541 | if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) | |
1542 | slot->host->state = STATE_IDLE; | |
f95f3850 WN |
1543 | } |
1544 | ||
01730558 DA |
1545 | static int dw_mci_card_busy(struct mmc_host *mmc) |
1546 | { | |
1547 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1548 | u32 status; | |
1549 | ||
1550 | /* | |
1551 | * Check the busy bit which is low when DAT[3:0] | |
1552 | * (the data lines) are 0000 | |
1553 | */ | |
1554 | status = mci_readl(slot->host, STATUS); | |
1555 | ||
1556 | return !!(status & SDMMC_STATUS_BUSY); | |
1557 | } | |
1558 | ||
1559 | static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) | |
1560 | { | |
1561 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1562 | struct dw_mci *host = slot->host; | |
8f7849c4 | 1563 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
01730558 DA |
1564 | u32 uhs; |
1565 | u32 v18 = SDMMC_UHS_18V << slot->id; | |
01730558 DA |
1566 | int ret; |
1567 | ||
8f7849c4 ZG |
1568 | if (drv_data && drv_data->switch_voltage) |
1569 | return drv_data->switch_voltage(mmc, ios); | |
1570 | ||
01730558 DA |
1571 | /* |
1572 | * Program the voltage. Note that some instances of dw_mmc may use | |
1573 | * the UHS_REG for this. For other instances (like exynos) the UHS_REG | |
1574 | * does no harm but you need to set the regulator directly. Try both. | |
1575 | */ | |
1576 | uhs = mci_readl(host, UHS_REG); | |
e0848f5d | 1577 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
01730558 | 1578 | uhs &= ~v18; |
e0848f5d | 1579 | else |
01730558 | 1580 | uhs |= v18; |
e0848f5d | 1581 | |
01730558 | 1582 | if (!IS_ERR(mmc->supply.vqmmc)) { |
e0848f5d | 1583 | ret = mmc_regulator_set_vqmmc(mmc, ios); |
01730558 DA |
1584 | |
1585 | if (ret) { | |
b19caf37 | 1586 | dev_dbg(&mmc->class_dev, |
e0848f5d DA |
1587 | "Regulator set error %d - %s V\n", |
1588 | ret, uhs & v18 ? "1.8" : "3.3"); | |
01730558 DA |
1589 | return ret; |
1590 | } | |
1591 | } | |
1592 | mci_writel(host, UHS_REG, uhs); | |
1593 | ||
1594 | return 0; | |
1595 | } | |
1596 | ||
f95f3850 WN |
1597 | static int dw_mci_get_ro(struct mmc_host *mmc) |
1598 | { | |
1599 | int read_only; | |
1600 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
9795a846 | 1601 | int gpio_ro = mmc_gpio_get_ro(mmc); |
f95f3850 WN |
1602 | |
1603 | /* Use platform get_ro function, else try on board write protect */ | |
287980e4 | 1604 | if (gpio_ro >= 0) |
9795a846 | 1605 | read_only = gpio_ro; |
f95f3850 WN |
1606 | else |
1607 | read_only = | |
1608 | mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; | |
1609 | ||
1610 | dev_dbg(&mmc->class_dev, "card is %s\n", | |
1611 | read_only ? "read-only" : "read-write"); | |
1612 | ||
1613 | return read_only; | |
1614 | } | |
1615 | ||
935a665e SL |
1616 | static void dw_mci_hw_reset(struct mmc_host *mmc) |
1617 | { | |
1618 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1619 | struct dw_mci *host = slot->host; | |
1620 | int reset; | |
1621 | ||
1622 | if (host->use_dma == TRANS_MODE_IDMAC) | |
1623 | dw_mci_idmac_reset(host); | |
1624 | ||
1625 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET | | |
1626 | SDMMC_CTRL_FIFO_RESET)) | |
1627 | return; | |
1628 | ||
1629 | /* | |
1630 | * According to eMMC spec, card reset procedure: | |
1631 | * tRstW >= 1us: RST_n pulse width | |
1632 | * tRSCA >= 200us: RST_n to Command time | |
1633 | * tRSTH >= 1us: RST_n high period | |
1634 | */ | |
1635 | reset = mci_readl(host, RST_N); | |
1636 | reset &= ~(SDMMC_RST_HWACTIVE << slot->id); | |
1637 | mci_writel(host, RST_N, reset); | |
1638 | usleep_range(1, 2); | |
1639 | reset |= SDMMC_RST_HWACTIVE << slot->id; | |
1640 | mci_writel(host, RST_N, reset); | |
1641 | usleep_range(200, 300); | |
1642 | } | |
1643 | ||
b24c8b26 | 1644 | static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card) |
9623b5b9 | 1645 | { |
b24c8b26 | 1646 | struct dw_mci_slot *slot = mmc_priv(mmc); |
9623b5b9 | 1647 | struct dw_mci *host = slot->host; |
9623b5b9 | 1648 | |
b24c8b26 DA |
1649 | /* |
1650 | * Low power mode will stop the card clock when idle. According to the | |
1651 | * description of the CLKENA register we should disable low power mode | |
1652 | * for SDIO cards if we need SDIO interrupts to work. | |
1653 | */ | |
1654 | if (mmc->caps & MMC_CAP_SDIO_IRQ) { | |
1655 | const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; | |
1656 | u32 clk_en_a_old; | |
1657 | u32 clk_en_a; | |
9623b5b9 | 1658 | |
b24c8b26 DA |
1659 | clk_en_a_old = mci_readl(host, CLKENA); |
1660 | ||
1661 | if (card->type == MMC_TYPE_SDIO || | |
1662 | card->type == MMC_TYPE_SD_COMBO) { | |
0eebf9b9 | 1663 | set_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); |
b24c8b26 DA |
1664 | clk_en_a = clk_en_a_old & ~clken_low_pwr; |
1665 | } else { | |
0eebf9b9 | 1666 | clear_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); |
b24c8b26 DA |
1667 | clk_en_a = clk_en_a_old | clken_low_pwr; |
1668 | } | |
1669 | ||
1670 | if (clk_en_a != clk_en_a_old) { | |
1671 | mci_writel(host, CLKENA, clk_en_a); | |
1672 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
1673 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
1674 | } | |
9623b5b9 DA |
1675 | } |
1676 | } | |
1677 | ||
32dba737 | 1678 | static void __dw_mci_enable_sdio_irq(struct dw_mci_slot *slot, int enb) |
1a5c8e1f | 1679 | { |
1a5c8e1f | 1680 | struct dw_mci *host = slot->host; |
f8c58c11 | 1681 | unsigned long irqflags; |
1a5c8e1f SH |
1682 | u32 int_mask; |
1683 | ||
f8c58c11 DA |
1684 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1685 | ||
1a5c8e1f SH |
1686 | /* Enable/disable Slot Specific SDIO interrupt */ |
1687 | int_mask = mci_readl(host, INTMASK); | |
b24c8b26 DA |
1688 | if (enb) |
1689 | int_mask |= SDMMC_INT_SDIO(slot->sdio_id); | |
1690 | else | |
1691 | int_mask &= ~SDMMC_INT_SDIO(slot->sdio_id); | |
1692 | mci_writel(host, INTMASK, int_mask); | |
f8c58c11 DA |
1693 | |
1694 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
1a5c8e1f SH |
1695 | } |
1696 | ||
32dba737 UH |
1697 | static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) |
1698 | { | |
1699 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
ca8971ca | 1700 | struct dw_mci *host = slot->host; |
32dba737 UH |
1701 | |
1702 | __dw_mci_enable_sdio_irq(slot, enb); | |
ca8971ca UH |
1703 | |
1704 | /* Avoid runtime suspending the device when SDIO IRQ is enabled */ | |
1705 | if (enb) | |
1706 | pm_runtime_get_noresume(host->dev); | |
1707 | else | |
1708 | pm_runtime_put_noidle(host->dev); | |
32dba737 UH |
1709 | } |
1710 | ||
1711 | static void dw_mci_ack_sdio_irq(struct mmc_host *mmc) | |
1712 | { | |
1713 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1714 | ||
1715 | __dw_mci_enable_sdio_irq(slot, 1); | |
1716 | } | |
1717 | ||
0976f16d SJ |
1718 | static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
1719 | { | |
1720 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1721 | struct dw_mci *host = slot->host; | |
1722 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
0e3a22c0 | 1723 | int err = -EINVAL; |
0976f16d | 1724 | |
0976f16d | 1725 | if (drv_data && drv_data->execute_tuning) |
9979dbe5 | 1726 | err = drv_data->execute_tuning(slot, opcode); |
0976f16d SJ |
1727 | return err; |
1728 | } | |
1729 | ||
0e3a22c0 SL |
1730 | static int dw_mci_prepare_hs400_tuning(struct mmc_host *mmc, |
1731 | struct mmc_ios *ios) | |
80113132 SJ |
1732 | { |
1733 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1734 | struct dw_mci *host = slot->host; | |
1735 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
1736 | ||
1737 | if (drv_data && drv_data->prepare_hs400_tuning) | |
1738 | return drv_data->prepare_hs400_tuning(host, ios); | |
1739 | ||
1740 | return 0; | |
1741 | } | |
1742 | ||
4e7392b2 SL |
1743 | static bool dw_mci_reset(struct dw_mci *host) |
1744 | { | |
1745 | u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; | |
1746 | bool ret = false; | |
bc2dcc1a | 1747 | u32 status = 0; |
4e7392b2 SL |
1748 | |
1749 | /* | |
1750 | * Resetting generates a block interrupt, hence setting | |
1751 | * the scatter-gather pointer to NULL. | |
1752 | */ | |
1753 | if (host->sg) { | |
1754 | sg_miter_stop(&host->sg_miter); | |
1755 | host->sg = NULL; | |
1756 | } | |
1757 | ||
1758 | if (host->use_dma) | |
1759 | flags |= SDMMC_CTRL_DMA_RESET; | |
1760 | ||
1761 | if (dw_mci_ctrl_reset(host, flags)) { | |
1762 | /* | |
bc2dcc1a SL |
1763 | * In all cases we clear the RAWINTS |
1764 | * register to clear any interrupts. | |
4e7392b2 SL |
1765 | */ |
1766 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
1767 | ||
bc2dcc1a SL |
1768 | if (!host->use_dma) { |
1769 | ret = true; | |
1770 | goto ciu_out; | |
1771 | } | |
4e7392b2 | 1772 | |
bc2dcc1a SL |
1773 | /* Wait for dma_req to be cleared */ |
1774 | if (readl_poll_timeout_atomic(host->regs + SDMMC_STATUS, | |
1775 | status, | |
1776 | !(status & SDMMC_STATUS_DMA_REQ), | |
1777 | 1, 500 * USEC_PER_MSEC)) { | |
1778 | dev_err(host->dev, | |
1779 | "%s: Timeout waiting for dma_req to be cleared\n", | |
1780 | __func__); | |
1781 | goto ciu_out; | |
4e7392b2 | 1782 | } |
bc2dcc1a SL |
1783 | |
1784 | /* when using DMA next we reset the fifo again */ | |
1785 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) | |
1786 | goto ciu_out; | |
4e7392b2 SL |
1787 | } else { |
1788 | /* if the controller reset bit did clear, then set clock regs */ | |
1789 | if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { | |
1790 | dev_err(host->dev, | |
1791 | "%s: fifo/dma reset bits didn't clear but ciu was reset, doing clock update\n", | |
1792 | __func__); | |
1793 | goto ciu_out; | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | if (host->use_dma == TRANS_MODE_IDMAC) | |
1798 | /* It is also recommended that we reset and reprogram idmac */ | |
1799 | dw_mci_idmac_reset(host); | |
1800 | ||
1801 | ret = true; | |
1802 | ||
1803 | ciu_out: | |
1804 | /* After a CTRL reset we need to have CIU set clock registers */ | |
42f989c0 | 1805 | mci_send_cmd(host->slot, SDMMC_CMD_UPD_CLK, 0); |
4e7392b2 SL |
1806 | |
1807 | return ret; | |
1808 | } | |
1809 | ||
f95f3850 | 1810 | static const struct mmc_host_ops dw_mci_ops = { |
1a5c8e1f | 1811 | .request = dw_mci_request, |
9aa51408 SJ |
1812 | .pre_req = dw_mci_pre_req, |
1813 | .post_req = dw_mci_post_req, | |
1a5c8e1f SH |
1814 | .set_ios = dw_mci_set_ios, |
1815 | .get_ro = dw_mci_get_ro, | |
1816 | .get_cd = dw_mci_get_cd, | |
935a665e | 1817 | .hw_reset = dw_mci_hw_reset, |
1a5c8e1f | 1818 | .enable_sdio_irq = dw_mci_enable_sdio_irq, |
32dba737 | 1819 | .ack_sdio_irq = dw_mci_ack_sdio_irq, |
0976f16d | 1820 | .execute_tuning = dw_mci_execute_tuning, |
01730558 DA |
1821 | .card_busy = dw_mci_card_busy, |
1822 | .start_signal_voltage_switch = dw_mci_switch_voltage, | |
b24c8b26 | 1823 | .init_card = dw_mci_init_card, |
80113132 | 1824 | .prepare_hs400_tuning = dw_mci_prepare_hs400_tuning, |
f95f3850 WN |
1825 | }; |
1826 | ||
1827 | static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) | |
1828 | __releases(&host->lock) | |
1829 | __acquires(&host->lock) | |
1830 | { | |
1831 | struct dw_mci_slot *slot; | |
42f989c0 | 1832 | struct mmc_host *prev_mmc = host->slot->mmc; |
f95f3850 WN |
1833 | |
1834 | WARN_ON(host->cmd || host->data); | |
1835 | ||
42f989c0 | 1836 | host->slot->mrq = NULL; |
f95f3850 WN |
1837 | host->mrq = NULL; |
1838 | if (!list_empty(&host->queue)) { | |
1839 | slot = list_entry(host->queue.next, | |
1840 | struct dw_mci_slot, queue_node); | |
1841 | list_del(&slot->queue_node); | |
4a90920c | 1842 | dev_vdbg(host->dev, "list not empty: %s is next\n", |
f95f3850 WN |
1843 | mmc_hostname(slot->mmc)); |
1844 | host->state = STATE_SENDING_CMD; | |
1845 | dw_mci_start_request(host, slot); | |
1846 | } else { | |
4a90920c | 1847 | dev_vdbg(host->dev, "list empty\n"); |
01730558 DA |
1848 | |
1849 | if (host->state == STATE_SENDING_CMD11) | |
1850 | host->state = STATE_WAITING_CMD11_DONE; | |
1851 | else | |
1852 | host->state = STATE_IDLE; | |
f95f3850 WN |
1853 | } |
1854 | ||
1855 | spin_unlock(&host->lock); | |
1856 | mmc_request_done(prev_mmc, mrq); | |
1857 | spin_lock(&host->lock); | |
1858 | } | |
1859 | ||
e352c813 | 1860 | static int dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) |
f95f3850 WN |
1861 | { |
1862 | u32 status = host->cmd_status; | |
1863 | ||
1864 | host->cmd_status = 0; | |
1865 | ||
1866 | /* Read the response from the card (up to 16 bytes) */ | |
1867 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1868 | if (cmd->flags & MMC_RSP_136) { | |
1869 | cmd->resp[3] = mci_readl(host, RESP0); | |
1870 | cmd->resp[2] = mci_readl(host, RESP1); | |
1871 | cmd->resp[1] = mci_readl(host, RESP2); | |
1872 | cmd->resp[0] = mci_readl(host, RESP3); | |
1873 | } else { | |
1874 | cmd->resp[0] = mci_readl(host, RESP0); | |
1875 | cmd->resp[1] = 0; | |
1876 | cmd->resp[2] = 0; | |
1877 | cmd->resp[3] = 0; | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | if (status & SDMMC_INT_RTO) | |
1882 | cmd->error = -ETIMEDOUT; | |
1883 | else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) | |
1884 | cmd->error = -EILSEQ; | |
1885 | else if (status & SDMMC_INT_RESP_ERR) | |
1886 | cmd->error = -EIO; | |
1887 | else | |
1888 | cmd->error = 0; | |
1889 | ||
e352c813 SJ |
1890 | return cmd->error; |
1891 | } | |
1892 | ||
1893 | static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) | |
1894 | { | |
31bff450 | 1895 | u32 status = host->data_status; |
e352c813 SJ |
1896 | |
1897 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1898 | if (status & SDMMC_INT_DRTO) { | |
1899 | data->error = -ETIMEDOUT; | |
1900 | } else if (status & SDMMC_INT_DCRC) { | |
1901 | data->error = -EILSEQ; | |
1902 | } else if (status & SDMMC_INT_EBE) { | |
1903 | if (host->dir_status == | |
1904 | DW_MCI_SEND_STATUS) { | |
1905 | /* | |
1906 | * No data CRC status was returned. | |
1907 | * The number of bytes transferred | |
1908 | * will be exaggerated in PIO mode. | |
1909 | */ | |
1910 | data->bytes_xfered = 0; | |
1911 | data->error = -ETIMEDOUT; | |
1912 | } else if (host->dir_status == | |
1913 | DW_MCI_RECV_STATUS) { | |
e7a1dec1 | 1914 | data->error = -EILSEQ; |
e352c813 SJ |
1915 | } |
1916 | } else { | |
1917 | /* SDMMC_INT_SBE is included */ | |
e7a1dec1 | 1918 | data->error = -EILSEQ; |
e352c813 SJ |
1919 | } |
1920 | ||
e6cc0123 | 1921 | dev_dbg(host->dev, "data error, status 0x%08x\n", status); |
e352c813 SJ |
1922 | |
1923 | /* | |
1924 | * After an error, there may be data lingering | |
31bff450 | 1925 | * in the FIFO |
e352c813 | 1926 | */ |
3a33a94c | 1927 | dw_mci_reset(host); |
e352c813 SJ |
1928 | } else { |
1929 | data->bytes_xfered = data->blocks * data->blksz; | |
1930 | data->error = 0; | |
1931 | } | |
1932 | ||
1933 | return data->error; | |
f95f3850 WN |
1934 | } |
1935 | ||
57e10486 AK |
1936 | static void dw_mci_set_drto(struct dw_mci *host) |
1937 | { | |
1938 | unsigned int drto_clks; | |
9d9491a7 | 1939 | unsigned int drto_div; |
57e10486 | 1940 | unsigned int drto_ms; |
93c23ae3 | 1941 | unsigned long irqflags; |
57e10486 AK |
1942 | |
1943 | drto_clks = mci_readl(host, TMOUT) >> 8; | |
9d9491a7 DA |
1944 | drto_div = (mci_readl(host, CLKDIV) & 0xff) * 2; |
1945 | if (drto_div == 0) | |
1946 | drto_div = 1; | |
1947 | drto_ms = DIV_ROUND_UP(MSEC_PER_SEC * drto_clks * drto_div, | |
1948 | host->bus_hz); | |
57e10486 AK |
1949 | |
1950 | /* add a bit spare time */ | |
1951 | drto_ms += 10; | |
1952 | ||
93c23ae3 DA |
1953 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1954 | if (!test_bit(EVENT_DATA_COMPLETE, &host->pending_events)) | |
1955 | mod_timer(&host->dto_timer, | |
1956 | jiffies + msecs_to_jiffies(drto_ms)); | |
1957 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
57e10486 AK |
1958 | } |
1959 | ||
8892b705 DA |
1960 | static bool dw_mci_clear_pending_cmd_complete(struct dw_mci *host) |
1961 | { | |
1962 | if (!test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) | |
1963 | return false; | |
1964 | ||
1965 | /* | |
1966 | * Really be certain that the timer has stopped. This is a bit of | |
1967 | * paranoia and could only really happen if we had really bad | |
1968 | * interrupt latency and the interrupt routine and timeout were | |
1969 | * running concurrently so that the del_timer() in the interrupt | |
1970 | * handler couldn't run. | |
1971 | */ | |
1972 | WARN_ON(del_timer_sync(&host->cto_timer)); | |
1973 | clear_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
1974 | ||
1975 | return true; | |
1976 | } | |
1977 | ||
93c23ae3 DA |
1978 | static bool dw_mci_clear_pending_data_complete(struct dw_mci *host) |
1979 | { | |
1980 | if (!test_bit(EVENT_DATA_COMPLETE, &host->pending_events)) | |
1981 | return false; | |
1982 | ||
1983 | /* Extra paranoia just like dw_mci_clear_pending_cmd_complete() */ | |
1984 | WARN_ON(del_timer_sync(&host->dto_timer)); | |
1985 | clear_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
1986 | ||
1987 | return true; | |
1988 | } | |
1989 | ||
f95f3850 WN |
1990 | static void dw_mci_tasklet_func(unsigned long priv) |
1991 | { | |
1992 | struct dw_mci *host = (struct dw_mci *)priv; | |
1993 | struct mmc_data *data; | |
1994 | struct mmc_command *cmd; | |
e352c813 | 1995 | struct mmc_request *mrq; |
f95f3850 WN |
1996 | enum dw_mci_state state; |
1997 | enum dw_mci_state prev_state; | |
e352c813 | 1998 | unsigned int err; |
f95f3850 WN |
1999 | |
2000 | spin_lock(&host->lock); | |
2001 | ||
2002 | state = host->state; | |
2003 | data = host->data; | |
e352c813 | 2004 | mrq = host->mrq; |
f95f3850 WN |
2005 | |
2006 | do { | |
2007 | prev_state = state; | |
2008 | ||
2009 | switch (state) { | |
2010 | case STATE_IDLE: | |
01730558 | 2011 | case STATE_WAITING_CMD11_DONE: |
f95f3850 WN |
2012 | break; |
2013 | ||
01730558 | 2014 | case STATE_SENDING_CMD11: |
f95f3850 | 2015 | case STATE_SENDING_CMD: |
8892b705 | 2016 | if (!dw_mci_clear_pending_cmd_complete(host)) |
f95f3850 WN |
2017 | break; |
2018 | ||
2019 | cmd = host->cmd; | |
2020 | host->cmd = NULL; | |
2021 | set_bit(EVENT_CMD_COMPLETE, &host->completed_events); | |
e352c813 SJ |
2022 | err = dw_mci_command_complete(host, cmd); |
2023 | if (cmd == mrq->sbc && !err) { | |
053b3ce6 | 2024 | prev_state = state = STATE_SENDING_CMD; |
42f989c0 | 2025 | __dw_mci_start_request(host, host->slot, |
e352c813 | 2026 | mrq->cmd); |
053b3ce6 SJ |
2027 | goto unlock; |
2028 | } | |
2029 | ||
e352c813 | 2030 | if (cmd->data && err) { |
46d17952 DA |
2031 | /* |
2032 | * During UHS tuning sequence, sending the stop | |
2033 | * command after the response CRC error would | |
2034 | * throw the system into a confused state | |
2035 | * causing all future tuning phases to report | |
2036 | * failure. | |
2037 | * | |
2038 | * In such case controller will move into a data | |
2039 | * transfer state after a response error or | |
2040 | * response CRC error. Let's let that finish | |
2041 | * before trying to send a stop, so we'll go to | |
2042 | * STATE_SENDING_DATA. | |
2043 | * | |
2044 | * Although letting the data transfer take place | |
2045 | * will waste a bit of time (we already know | |
2046 | * the command was bad), it can't cause any | |
2047 | * errors since it's possible it would have | |
2048 | * taken place anyway if this tasklet got | |
2049 | * delayed. Allowing the transfer to take place | |
2050 | * avoids races and keeps things simple. | |
2051 | */ | |
2052 | if ((err != -ETIMEDOUT) && | |
2053 | (cmd->opcode == MMC_SEND_TUNING_BLOCK)) { | |
2054 | state = STATE_SENDING_DATA; | |
2055 | continue; | |
2056 | } | |
2057 | ||
71abb133 | 2058 | dw_mci_stop_dma(host); |
90c2143a SJ |
2059 | send_stop_abort(host, data); |
2060 | state = STATE_SENDING_STOP; | |
2061 | break; | |
71abb133 SJ |
2062 | } |
2063 | ||
e352c813 SJ |
2064 | if (!cmd->data || err) { |
2065 | dw_mci_request_end(host, mrq); | |
f95f3850 WN |
2066 | goto unlock; |
2067 | } | |
2068 | ||
2069 | prev_state = state = STATE_SENDING_DATA; | |
2070 | /* fall through */ | |
2071 | ||
2072 | case STATE_SENDING_DATA: | |
2aa35465 DA |
2073 | /* |
2074 | * We could get a data error and never a transfer | |
2075 | * complete so we'd better check for it here. | |
2076 | * | |
2077 | * Note that we don't really care if we also got a | |
2078 | * transfer complete; stopping the DMA and sending an | |
2079 | * abort won't hurt. | |
2080 | */ | |
f95f3850 WN |
2081 | if (test_and_clear_bit(EVENT_DATA_ERROR, |
2082 | &host->pending_events)) { | |
2083 | dw_mci_stop_dma(host); | |
e13c3c08 | 2084 | if (!(host->data_status & (SDMMC_INT_DRTO | |
bdb9a90b | 2085 | SDMMC_INT_EBE))) |
2086 | send_stop_abort(host, data); | |
f95f3850 WN |
2087 | state = STATE_DATA_ERROR; |
2088 | break; | |
2089 | } | |
2090 | ||
2091 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
57e10486 AK |
2092 | &host->pending_events)) { |
2093 | /* | |
2094 | * If all data-related interrupts don't come | |
2095 | * within the given time in reading data state. | |
2096 | */ | |
16a34574 | 2097 | if (host->dir_status == DW_MCI_RECV_STATUS) |
57e10486 | 2098 | dw_mci_set_drto(host); |
f95f3850 | 2099 | break; |
57e10486 | 2100 | } |
f95f3850 WN |
2101 | |
2102 | set_bit(EVENT_XFER_COMPLETE, &host->completed_events); | |
2aa35465 DA |
2103 | |
2104 | /* | |
2105 | * Handle an EVENT_DATA_ERROR that might have shown up | |
2106 | * before the transfer completed. This might not have | |
2107 | * been caught by the check above because the interrupt | |
2108 | * could have gone off between the previous check and | |
2109 | * the check for transfer complete. | |
2110 | * | |
2111 | * Technically this ought not be needed assuming we | |
2112 | * get a DATA_COMPLETE eventually (we'll notice the | |
2113 | * error and end the request), but it shouldn't hurt. | |
2114 | * | |
2115 | * This has the advantage of sending the stop command. | |
2116 | */ | |
2117 | if (test_and_clear_bit(EVENT_DATA_ERROR, | |
2118 | &host->pending_events)) { | |
2119 | dw_mci_stop_dma(host); | |
e13c3c08 | 2120 | if (!(host->data_status & (SDMMC_INT_DRTO | |
bdb9a90b | 2121 | SDMMC_INT_EBE))) |
2122 | send_stop_abort(host, data); | |
2aa35465 DA |
2123 | state = STATE_DATA_ERROR; |
2124 | break; | |
2125 | } | |
f95f3850 | 2126 | prev_state = state = STATE_DATA_BUSY; |
2aa35465 | 2127 | |
f95f3850 WN |
2128 | /* fall through */ |
2129 | ||
2130 | case STATE_DATA_BUSY: | |
93c23ae3 | 2131 | if (!dw_mci_clear_pending_data_complete(host)) { |
57e10486 AK |
2132 | /* |
2133 | * If data error interrupt comes but data over | |
2134 | * interrupt doesn't come within the given time. | |
2135 | * in reading data state. | |
2136 | */ | |
16a34574 | 2137 | if (host->dir_status == DW_MCI_RECV_STATUS) |
57e10486 | 2138 | dw_mci_set_drto(host); |
f95f3850 | 2139 | break; |
57e10486 | 2140 | } |
f95f3850 WN |
2141 | |
2142 | host->data = NULL; | |
2143 | set_bit(EVENT_DATA_COMPLETE, &host->completed_events); | |
e352c813 SJ |
2144 | err = dw_mci_data_complete(host, data); |
2145 | ||
2146 | if (!err) { | |
2147 | if (!data->stop || mrq->sbc) { | |
17c8bc85 | 2148 | if (mrq->sbc && data->stop) |
e352c813 SJ |
2149 | data->stop->error = 0; |
2150 | dw_mci_request_end(host, mrq); | |
2151 | goto unlock; | |
f95f3850 | 2152 | } |
f95f3850 | 2153 | |
e352c813 SJ |
2154 | /* stop command for open-ended transfer*/ |
2155 | if (data->stop) | |
2156 | send_stop_abort(host, data); | |
2aa35465 DA |
2157 | } else { |
2158 | /* | |
2159 | * If we don't have a command complete now we'll | |
2160 | * never get one since we just reset everything; | |
2161 | * better end the request. | |
2162 | * | |
2163 | * If we do have a command complete we'll fall | |
2164 | * through to the SENDING_STOP command and | |
2165 | * everything will be peachy keen. | |
2166 | */ | |
2167 | if (!test_bit(EVENT_CMD_COMPLETE, | |
2168 | &host->pending_events)) { | |
2169 | host->cmd = NULL; | |
2170 | dw_mci_request_end(host, mrq); | |
2171 | goto unlock; | |
2172 | } | |
053b3ce6 SJ |
2173 | } |
2174 | ||
e352c813 SJ |
2175 | /* |
2176 | * If err has non-zero, | |
2177 | * stop-abort command has been already issued. | |
2178 | */ | |
f95f3850 | 2179 | prev_state = state = STATE_SENDING_STOP; |
e352c813 | 2180 | |
f95f3850 WN |
2181 | /* fall through */ |
2182 | ||
2183 | case STATE_SENDING_STOP: | |
8892b705 | 2184 | if (!dw_mci_clear_pending_cmd_complete(host)) |
f95f3850 WN |
2185 | break; |
2186 | ||
71abb133 | 2187 | /* CMD error in data command */ |
31bff450 | 2188 | if (mrq->cmd->error && mrq->data) |
3a33a94c | 2189 | dw_mci_reset(host); |
71abb133 | 2190 | |
f95f3850 | 2191 | host->cmd = NULL; |
71abb133 | 2192 | host->data = NULL; |
90c2143a | 2193 | |
e13c3c08 | 2194 | if (!mrq->sbc && mrq->stop) |
e352c813 | 2195 | dw_mci_command_complete(host, mrq->stop); |
90c2143a SJ |
2196 | else |
2197 | host->cmd_status = 0; | |
2198 | ||
e352c813 | 2199 | dw_mci_request_end(host, mrq); |
f95f3850 WN |
2200 | goto unlock; |
2201 | ||
2202 | case STATE_DATA_ERROR: | |
2203 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
2204 | &host->pending_events)) | |
2205 | break; | |
2206 | ||
2207 | state = STATE_DATA_BUSY; | |
2208 | break; | |
2209 | } | |
2210 | } while (state != prev_state); | |
2211 | ||
2212 | host->state = state; | |
2213 | unlock: | |
2214 | spin_unlock(&host->lock); | |
2215 | ||
2216 | } | |
2217 | ||
34b664a2 JH |
2218 | /* push final bytes to part_buf, only use during push */ |
2219 | static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 2220 | { |
34b664a2 JH |
2221 | memcpy((void *)&host->part_buf, buf, cnt); |
2222 | host->part_buf_count = cnt; | |
2223 | } | |
f95f3850 | 2224 | |
34b664a2 JH |
2225 | /* append bytes to part_buf, only use during push */ |
2226 | static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
2227 | { | |
2228 | cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); | |
2229 | memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); | |
2230 | host->part_buf_count += cnt; | |
2231 | return cnt; | |
2232 | } | |
f95f3850 | 2233 | |
34b664a2 JH |
2234 | /* pull first bytes from part_buf, only use during pull */ |
2235 | static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
2236 | { | |
0e3a22c0 | 2237 | cnt = min_t(int, cnt, host->part_buf_count); |
34b664a2 JH |
2238 | if (cnt) { |
2239 | memcpy(buf, (void *)&host->part_buf + host->part_buf_start, | |
2240 | cnt); | |
2241 | host->part_buf_count -= cnt; | |
2242 | host->part_buf_start += cnt; | |
f95f3850 | 2243 | } |
34b664a2 | 2244 | return cnt; |
f95f3850 WN |
2245 | } |
2246 | ||
34b664a2 JH |
2247 | /* pull final bytes from the part_buf, assuming it's just been filled */ |
2248 | static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 2249 | { |
34b664a2 JH |
2250 | memcpy(buf, &host->part_buf, cnt); |
2251 | host->part_buf_start = cnt; | |
2252 | host->part_buf_count = (1 << host->data_shift) - cnt; | |
2253 | } | |
f95f3850 | 2254 | |
34b664a2 JH |
2255 | static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) |
2256 | { | |
cfbeb59c MC |
2257 | struct mmc_data *data = host->data; |
2258 | int init_cnt = cnt; | |
2259 | ||
34b664a2 JH |
2260 | /* try and push anything in the part_buf */ |
2261 | if (unlikely(host->part_buf_count)) { | |
2262 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2263 | |
34b664a2 JH |
2264 | buf += len; |
2265 | cnt -= len; | |
cfbeb59c | 2266 | if (host->part_buf_count == 2) { |
76184ac1 | 2267 | mci_fifo_writew(host->fifo_reg, host->part_buf16); |
34b664a2 JH |
2268 | host->part_buf_count = 0; |
2269 | } | |
2270 | } | |
2271 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2272 | if (unlikely((unsigned long)buf & 0x1)) { | |
2273 | while (cnt >= 2) { | |
2274 | u16 aligned_buf[64]; | |
2275 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
2276 | int items = len >> 1; | |
2277 | int i; | |
2278 | /* memcpy from input buffer into aligned buffer */ | |
2279 | memcpy(aligned_buf, buf, len); | |
2280 | buf += len; | |
2281 | cnt -= len; | |
2282 | /* push data from aligned buffer into fifo */ | |
2283 | for (i = 0; i < items; ++i) | |
76184ac1 | 2284 | mci_fifo_writew(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2285 | } |
2286 | } else | |
2287 | #endif | |
2288 | { | |
2289 | u16 *pdata = buf; | |
0e3a22c0 | 2290 | |
34b664a2 | 2291 | for (; cnt >= 2; cnt -= 2) |
76184ac1 | 2292 | mci_fifo_writew(host->fifo_reg, *pdata++); |
34b664a2 JH |
2293 | buf = pdata; |
2294 | } | |
2295 | /* put anything remaining in the part_buf */ | |
2296 | if (cnt) { | |
2297 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2298 | /* Push data if we have reached the expected data length */ |
2299 | if ((data->bytes_xfered + init_cnt) == | |
2300 | (data->blksz * data->blocks)) | |
76184ac1 | 2301 | mci_fifo_writew(host->fifo_reg, host->part_buf16); |
34b664a2 JH |
2302 | } |
2303 | } | |
f95f3850 | 2304 | |
34b664a2 JH |
2305 | static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) |
2306 | { | |
2307 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2308 | if (unlikely((unsigned long)buf & 0x1)) { | |
2309 | while (cnt >= 2) { | |
2310 | /* pull data from fifo into aligned buffer */ | |
2311 | u16 aligned_buf[64]; | |
2312 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
2313 | int items = len >> 1; | |
2314 | int i; | |
0e3a22c0 | 2315 | |
34b664a2 | 2316 | for (i = 0; i < items; ++i) |
76184ac1 | 2317 | aligned_buf[i] = mci_fifo_readw(host->fifo_reg); |
34b664a2 JH |
2318 | /* memcpy from aligned buffer into output buffer */ |
2319 | memcpy(buf, aligned_buf, len); | |
2320 | buf += len; | |
2321 | cnt -= len; | |
2322 | } | |
2323 | } else | |
2324 | #endif | |
2325 | { | |
2326 | u16 *pdata = buf; | |
0e3a22c0 | 2327 | |
34b664a2 | 2328 | for (; cnt >= 2; cnt -= 2) |
76184ac1 | 2329 | *pdata++ = mci_fifo_readw(host->fifo_reg); |
34b664a2 JH |
2330 | buf = pdata; |
2331 | } | |
2332 | if (cnt) { | |
76184ac1 | 2333 | host->part_buf16 = mci_fifo_readw(host->fifo_reg); |
34b664a2 | 2334 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
2335 | } |
2336 | } | |
2337 | ||
2338 | static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) | |
2339 | { | |
cfbeb59c MC |
2340 | struct mmc_data *data = host->data; |
2341 | int init_cnt = cnt; | |
2342 | ||
34b664a2 JH |
2343 | /* try and push anything in the part_buf */ |
2344 | if (unlikely(host->part_buf_count)) { | |
2345 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2346 | |
34b664a2 JH |
2347 | buf += len; |
2348 | cnt -= len; | |
cfbeb59c | 2349 | if (host->part_buf_count == 4) { |
76184ac1 | 2350 | mci_fifo_writel(host->fifo_reg, host->part_buf32); |
34b664a2 JH |
2351 | host->part_buf_count = 0; |
2352 | } | |
2353 | } | |
2354 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2355 | if (unlikely((unsigned long)buf & 0x3)) { | |
2356 | while (cnt >= 4) { | |
2357 | u32 aligned_buf[32]; | |
2358 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
2359 | int items = len >> 2; | |
2360 | int i; | |
2361 | /* memcpy from input buffer into aligned buffer */ | |
2362 | memcpy(aligned_buf, buf, len); | |
2363 | buf += len; | |
2364 | cnt -= len; | |
2365 | /* push data from aligned buffer into fifo */ | |
2366 | for (i = 0; i < items; ++i) | |
76184ac1 | 2367 | mci_fifo_writel(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2368 | } |
2369 | } else | |
2370 | #endif | |
2371 | { | |
2372 | u32 *pdata = buf; | |
0e3a22c0 | 2373 | |
34b664a2 | 2374 | for (; cnt >= 4; cnt -= 4) |
76184ac1 | 2375 | mci_fifo_writel(host->fifo_reg, *pdata++); |
34b664a2 JH |
2376 | buf = pdata; |
2377 | } | |
2378 | /* put anything remaining in the part_buf */ | |
2379 | if (cnt) { | |
2380 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2381 | /* Push data if we have reached the expected data length */ |
2382 | if ((data->bytes_xfered + init_cnt) == | |
2383 | (data->blksz * data->blocks)) | |
76184ac1 | 2384 | mci_fifo_writel(host->fifo_reg, host->part_buf32); |
f95f3850 WN |
2385 | } |
2386 | } | |
2387 | ||
2388 | static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) | |
2389 | { | |
34b664a2 JH |
2390 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
2391 | if (unlikely((unsigned long)buf & 0x3)) { | |
2392 | while (cnt >= 4) { | |
2393 | /* pull data from fifo into aligned buffer */ | |
2394 | u32 aligned_buf[32]; | |
2395 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
2396 | int items = len >> 2; | |
2397 | int i; | |
0e3a22c0 | 2398 | |
34b664a2 | 2399 | for (i = 0; i < items; ++i) |
76184ac1 | 2400 | aligned_buf[i] = mci_fifo_readl(host->fifo_reg); |
34b664a2 JH |
2401 | /* memcpy from aligned buffer into output buffer */ |
2402 | memcpy(buf, aligned_buf, len); | |
2403 | buf += len; | |
2404 | cnt -= len; | |
2405 | } | |
2406 | } else | |
2407 | #endif | |
2408 | { | |
2409 | u32 *pdata = buf; | |
0e3a22c0 | 2410 | |
34b664a2 | 2411 | for (; cnt >= 4; cnt -= 4) |
76184ac1 | 2412 | *pdata++ = mci_fifo_readl(host->fifo_reg); |
34b664a2 JH |
2413 | buf = pdata; |
2414 | } | |
2415 | if (cnt) { | |
76184ac1 | 2416 | host->part_buf32 = mci_fifo_readl(host->fifo_reg); |
34b664a2 | 2417 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
2418 | } |
2419 | } | |
2420 | ||
2421 | static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) | |
2422 | { | |
cfbeb59c MC |
2423 | struct mmc_data *data = host->data; |
2424 | int init_cnt = cnt; | |
2425 | ||
34b664a2 JH |
2426 | /* try and push anything in the part_buf */ |
2427 | if (unlikely(host->part_buf_count)) { | |
2428 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2429 | |
34b664a2 JH |
2430 | buf += len; |
2431 | cnt -= len; | |
c09fbd74 | 2432 | |
cfbeb59c | 2433 | if (host->part_buf_count == 8) { |
76184ac1 | 2434 | mci_fifo_writeq(host->fifo_reg, host->part_buf); |
34b664a2 JH |
2435 | host->part_buf_count = 0; |
2436 | } | |
2437 | } | |
2438 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2439 | if (unlikely((unsigned long)buf & 0x7)) { | |
2440 | while (cnt >= 8) { | |
2441 | u64 aligned_buf[16]; | |
2442 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
2443 | int items = len >> 3; | |
2444 | int i; | |
2445 | /* memcpy from input buffer into aligned buffer */ | |
2446 | memcpy(aligned_buf, buf, len); | |
2447 | buf += len; | |
2448 | cnt -= len; | |
2449 | /* push data from aligned buffer into fifo */ | |
2450 | for (i = 0; i < items; ++i) | |
76184ac1 | 2451 | mci_fifo_writeq(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2452 | } |
2453 | } else | |
2454 | #endif | |
2455 | { | |
2456 | u64 *pdata = buf; | |
0e3a22c0 | 2457 | |
34b664a2 | 2458 | for (; cnt >= 8; cnt -= 8) |
76184ac1 | 2459 | mci_fifo_writeq(host->fifo_reg, *pdata++); |
34b664a2 JH |
2460 | buf = pdata; |
2461 | } | |
2462 | /* put anything remaining in the part_buf */ | |
2463 | if (cnt) { | |
2464 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2465 | /* Push data if we have reached the expected data length */ |
2466 | if ((data->bytes_xfered + init_cnt) == | |
2467 | (data->blksz * data->blocks)) | |
76184ac1 | 2468 | mci_fifo_writeq(host->fifo_reg, host->part_buf); |
f95f3850 WN |
2469 | } |
2470 | } | |
2471 | ||
2472 | static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) | |
2473 | { | |
34b664a2 JH |
2474 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
2475 | if (unlikely((unsigned long)buf & 0x7)) { | |
2476 | while (cnt >= 8) { | |
2477 | /* pull data from fifo into aligned buffer */ | |
2478 | u64 aligned_buf[16]; | |
2479 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
2480 | int items = len >> 3; | |
2481 | int i; | |
0e3a22c0 | 2482 | |
34b664a2 | 2483 | for (i = 0; i < items; ++i) |
76184ac1 BD |
2484 | aligned_buf[i] = mci_fifo_readq(host->fifo_reg); |
2485 | ||
34b664a2 JH |
2486 | /* memcpy from aligned buffer into output buffer */ |
2487 | memcpy(buf, aligned_buf, len); | |
2488 | buf += len; | |
2489 | cnt -= len; | |
2490 | } | |
2491 | } else | |
2492 | #endif | |
2493 | { | |
2494 | u64 *pdata = buf; | |
0e3a22c0 | 2495 | |
34b664a2 | 2496 | for (; cnt >= 8; cnt -= 8) |
76184ac1 | 2497 | *pdata++ = mci_fifo_readq(host->fifo_reg); |
34b664a2 JH |
2498 | buf = pdata; |
2499 | } | |
2500 | if (cnt) { | |
76184ac1 | 2501 | host->part_buf = mci_fifo_readq(host->fifo_reg); |
34b664a2 JH |
2502 | dw_mci_pull_final_bytes(host, buf, cnt); |
2503 | } | |
2504 | } | |
f95f3850 | 2505 | |
34b664a2 JH |
2506 | static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) |
2507 | { | |
2508 | int len; | |
f95f3850 | 2509 | |
34b664a2 JH |
2510 | /* get remaining partial bytes */ |
2511 | len = dw_mci_pull_part_bytes(host, buf, cnt); | |
2512 | if (unlikely(len == cnt)) | |
2513 | return; | |
2514 | buf += len; | |
2515 | cnt -= len; | |
2516 | ||
2517 | /* get the rest of the data */ | |
2518 | host->pull_data(host, buf, cnt); | |
f95f3850 WN |
2519 | } |
2520 | ||
87a74d39 | 2521 | static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) |
f95f3850 | 2522 | { |
f9c2a0dc SJ |
2523 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2524 | void *buf; | |
2525 | unsigned int offset; | |
f95f3850 WN |
2526 | struct mmc_data *data = host->data; |
2527 | int shift = host->data_shift; | |
2528 | u32 status; | |
3e4b0d8b | 2529 | unsigned int len; |
f9c2a0dc | 2530 | unsigned int remain, fcnt; |
f95f3850 WN |
2531 | |
2532 | do { | |
f9c2a0dc SJ |
2533 | if (!sg_miter_next(sg_miter)) |
2534 | goto done; | |
2535 | ||
4225fc85 | 2536 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2537 | buf = sg_miter->addr; |
2538 | remain = sg_miter->length; | |
2539 | offset = 0; | |
2540 | ||
2541 | do { | |
2542 | fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) | |
2543 | << shift) + host->part_buf_count; | |
2544 | len = min(remain, fcnt); | |
2545 | if (!len) | |
2546 | break; | |
34b664a2 | 2547 | dw_mci_pull_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2548 | data->bytes_xfered += len; |
f95f3850 | 2549 | offset += len; |
f9c2a0dc SJ |
2550 | remain -= len; |
2551 | } while (remain); | |
f95f3850 | 2552 | |
e74f3a9c | 2553 | sg_miter->consumed = offset; |
f95f3850 WN |
2554 | status = mci_readl(host, MINTSTS); |
2555 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
87a74d39 KK |
2556 | /* if the RXDR is ready read again */ |
2557 | } while ((status & SDMMC_INT_RXDR) || | |
2558 | (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); | |
f9c2a0dc SJ |
2559 | |
2560 | if (!remain) { | |
2561 | if (!sg_miter_next(sg_miter)) | |
2562 | goto done; | |
2563 | sg_miter->consumed = 0; | |
2564 | } | |
2565 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2566 | return; |
2567 | ||
2568 | done: | |
f9c2a0dc SJ |
2569 | sg_miter_stop(sg_miter); |
2570 | host->sg = NULL; | |
0e3a22c0 | 2571 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2572 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); |
2573 | } | |
2574 | ||
2575 | static void dw_mci_write_data_pio(struct dw_mci *host) | |
2576 | { | |
f9c2a0dc SJ |
2577 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2578 | void *buf; | |
2579 | unsigned int offset; | |
f95f3850 WN |
2580 | struct mmc_data *data = host->data; |
2581 | int shift = host->data_shift; | |
2582 | u32 status; | |
3e4b0d8b | 2583 | unsigned int len; |
f9c2a0dc SJ |
2584 | unsigned int fifo_depth = host->fifo_depth; |
2585 | unsigned int remain, fcnt; | |
f95f3850 WN |
2586 | |
2587 | do { | |
f9c2a0dc SJ |
2588 | if (!sg_miter_next(sg_miter)) |
2589 | goto done; | |
2590 | ||
4225fc85 | 2591 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2592 | buf = sg_miter->addr; |
2593 | remain = sg_miter->length; | |
2594 | offset = 0; | |
2595 | ||
2596 | do { | |
2597 | fcnt = ((fifo_depth - | |
2598 | SDMMC_GET_FCNT(mci_readl(host, STATUS))) | |
2599 | << shift) - host->part_buf_count; | |
2600 | len = min(remain, fcnt); | |
2601 | if (!len) | |
2602 | break; | |
f95f3850 | 2603 | host->push_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2604 | data->bytes_xfered += len; |
f95f3850 | 2605 | offset += len; |
f9c2a0dc SJ |
2606 | remain -= len; |
2607 | } while (remain); | |
f95f3850 | 2608 | |
e74f3a9c | 2609 | sg_miter->consumed = offset; |
f95f3850 WN |
2610 | status = mci_readl(host, MINTSTS); |
2611 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
f95f3850 | 2612 | } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ |
f9c2a0dc SJ |
2613 | |
2614 | if (!remain) { | |
2615 | if (!sg_miter_next(sg_miter)) | |
2616 | goto done; | |
2617 | sg_miter->consumed = 0; | |
2618 | } | |
2619 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2620 | return; |
2621 | ||
2622 | done: | |
f9c2a0dc SJ |
2623 | sg_miter_stop(sg_miter); |
2624 | host->sg = NULL; | |
0e3a22c0 | 2625 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2626 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); |
2627 | } | |
2628 | ||
2629 | static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) | |
2630 | { | |
0363b12d DA |
2631 | del_timer(&host->cto_timer); |
2632 | ||
f95f3850 WN |
2633 | if (!host->cmd_status) |
2634 | host->cmd_status = status; | |
2635 | ||
0e3a22c0 | 2636 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2637 | |
2638 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
2639 | tasklet_schedule(&host->tasklet); | |
2640 | } | |
2641 | ||
6130e7a9 DA |
2642 | static void dw_mci_handle_cd(struct dw_mci *host) |
2643 | { | |
b23475fa | 2644 | struct dw_mci_slot *slot = host->slot; |
6130e7a9 | 2645 | |
58870241 JC |
2646 | if (slot->mmc->ops->card_event) |
2647 | slot->mmc->ops->card_event(slot->mmc); | |
2648 | mmc_detect_change(slot->mmc, | |
2649 | msecs_to_jiffies(host->pdata->detect_delay_ms)); | |
6130e7a9 DA |
2650 | } |
2651 | ||
f95f3850 WN |
2652 | static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) |
2653 | { | |
2654 | struct dw_mci *host = dev_id; | |
182c9081 | 2655 | u32 pending; |
b23475fa | 2656 | struct dw_mci_slot *slot = host->slot; |
8892b705 | 2657 | unsigned long irqflags; |
f95f3850 | 2658 | |
1fb5f68a MC |
2659 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ |
2660 | ||
476d79f1 | 2661 | if (pending) { |
01730558 DA |
2662 | /* Check volt switch first, since it can look like an error */ |
2663 | if ((host->state == STATE_SENDING_CMD11) && | |
2664 | (pending & SDMMC_INT_VOLT_SWITCH)) { | |
2665 | mci_writel(host, RINTSTS, SDMMC_INT_VOLT_SWITCH); | |
2666 | pending &= ~SDMMC_INT_VOLT_SWITCH; | |
49ba0302 DA |
2667 | |
2668 | /* | |
2669 | * Hold the lock; we know cmd11_timer can't be kicked | |
2670 | * off after the lock is released, so safe to delete. | |
2671 | */ | |
2672 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
01730558 | 2673 | dw_mci_cmd_interrupt(host, pending); |
49ba0302 DA |
2674 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
2675 | ||
2676 | del_timer(&host->cmd11_timer); | |
01730558 DA |
2677 | } |
2678 | ||
f95f3850 | 2679 | if (pending & DW_MCI_CMD_ERROR_FLAGS) { |
8892b705 DA |
2680 | spin_lock_irqsave(&host->irq_lock, irqflags); |
2681 | ||
03de1921 | 2682 | del_timer(&host->cto_timer); |
f95f3850 | 2683 | mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); |
182c9081 | 2684 | host->cmd_status = pending; |
0e3a22c0 | 2685 | smp_wmb(); /* drain writebuffer */ |
f95f3850 | 2686 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); |
8892b705 DA |
2687 | |
2688 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
f95f3850 WN |
2689 | } |
2690 | ||
2691 | if (pending & DW_MCI_DATA_ERROR_FLAGS) { | |
2692 | /* if there is an error report DATA_ERROR */ | |
2693 | mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); | |
182c9081 | 2694 | host->data_status = pending; |
0e3a22c0 | 2695 | smp_wmb(); /* drain writebuffer */ |
f95f3850 | 2696 | set_bit(EVENT_DATA_ERROR, &host->pending_events); |
9b2026a1 | 2697 | tasklet_schedule(&host->tasklet); |
f95f3850 WN |
2698 | } |
2699 | ||
2700 | if (pending & SDMMC_INT_DATA_OVER) { | |
93c23ae3 DA |
2701 | spin_lock_irqsave(&host->irq_lock, irqflags); |
2702 | ||
16a34574 | 2703 | del_timer(&host->dto_timer); |
57e10486 | 2704 | |
f95f3850 WN |
2705 | mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); |
2706 | if (!host->data_status) | |
182c9081 | 2707 | host->data_status = pending; |
0e3a22c0 | 2708 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2709 | if (host->dir_status == DW_MCI_RECV_STATUS) { |
2710 | if (host->sg != NULL) | |
87a74d39 | 2711 | dw_mci_read_data_pio(host, true); |
f95f3850 WN |
2712 | } |
2713 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
2714 | tasklet_schedule(&host->tasklet); | |
93c23ae3 DA |
2715 | |
2716 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
f95f3850 WN |
2717 | } |
2718 | ||
2719 | if (pending & SDMMC_INT_RXDR) { | |
2720 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
b40af3aa | 2721 | if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) |
87a74d39 | 2722 | dw_mci_read_data_pio(host, false); |
f95f3850 WN |
2723 | } |
2724 | ||
2725 | if (pending & SDMMC_INT_TXDR) { | |
2726 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
b40af3aa | 2727 | if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) |
f95f3850 WN |
2728 | dw_mci_write_data_pio(host); |
2729 | } | |
2730 | ||
2731 | if (pending & SDMMC_INT_CMD_DONE) { | |
8892b705 DA |
2732 | spin_lock_irqsave(&host->irq_lock, irqflags); |
2733 | ||
f95f3850 | 2734 | mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); |
182c9081 | 2735 | dw_mci_cmd_interrupt(host, pending); |
8892b705 DA |
2736 | |
2737 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
f95f3850 WN |
2738 | } |
2739 | ||
2740 | if (pending & SDMMC_INT_CD) { | |
2741 | mci_writel(host, RINTSTS, SDMMC_INT_CD); | |
6130e7a9 | 2742 | dw_mci_handle_cd(host); |
f95f3850 WN |
2743 | } |
2744 | ||
58870241 JC |
2745 | if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { |
2746 | mci_writel(host, RINTSTS, | |
2747 | SDMMC_INT_SDIO(slot->sdio_id)); | |
2748 | __dw_mci_enable_sdio_irq(slot, 0); | |
2749 | sdio_signal_irq(slot->mmc); | |
1a5c8e1f SH |
2750 | } |
2751 | ||
1fb5f68a | 2752 | } |
f95f3850 | 2753 | |
3fc7eaef SL |
2754 | if (host->use_dma != TRANS_MODE_IDMAC) |
2755 | return IRQ_HANDLED; | |
2756 | ||
2757 | /* Handle IDMA interrupts */ | |
69d99fdc PT |
2758 | if (host->dma_64bit_address == 1) { |
2759 | pending = mci_readl(host, IDSTS64); | |
2760 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2761 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_TI | | |
2762 | SDMMC_IDMAC_INT_RI); | |
2763 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_NI); | |
faecf411 SL |
2764 | if (!test_bit(EVENT_DATA_ERROR, &host->pending_events)) |
2765 | host->dma_ops->complete((void *)host); | |
69d99fdc PT |
2766 | } |
2767 | } else { | |
2768 | pending = mci_readl(host, IDSTS); | |
2769 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2770 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | | |
2771 | SDMMC_IDMAC_INT_RI); | |
2772 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); | |
faecf411 SL |
2773 | if (!test_bit(EVENT_DATA_ERROR, &host->pending_events)) |
2774 | host->dma_ops->complete((void *)host); | |
69d99fdc | 2775 | } |
f95f3850 | 2776 | } |
f95f3850 WN |
2777 | |
2778 | return IRQ_HANDLED; | |
2779 | } | |
2780 | ||
e4a65ef7 | 2781 | static int dw_mci_init_slot(struct dw_mci *host) |
f95f3850 WN |
2782 | { |
2783 | struct mmc_host *mmc; | |
2784 | struct dw_mci_slot *slot; | |
e95baf13 | 2785 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2786 | int ctrl_id, ret; |
1f44a2a5 | 2787 | u32 freq[2]; |
f95f3850 | 2788 | |
4a90920c | 2789 | mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); |
f95f3850 WN |
2790 | if (!mmc) |
2791 | return -ENOMEM; | |
2792 | ||
2793 | slot = mmc_priv(mmc); | |
e4a65ef7 JC |
2794 | slot->id = 0; |
2795 | slot->sdio_id = host->sdio_id0 + slot->id; | |
f95f3850 WN |
2796 | slot->mmc = mmc; |
2797 | slot->host = host; | |
b23475fa | 2798 | host->slot = slot; |
f95f3850 WN |
2799 | |
2800 | mmc->ops = &dw_mci_ops; | |
852ff5fe DW |
2801 | if (device_property_read_u32_array(host->dev, "clock-freq-min-max", |
2802 | freq, 2)) { | |
1f44a2a5 SJ |
2803 | mmc->f_min = DW_MCI_FREQ_MIN; |
2804 | mmc->f_max = DW_MCI_FREQ_MAX; | |
2805 | } else { | |
b023030f JC |
2806 | dev_info(host->dev, |
2807 | "'clock-freq-min-max' property was deprecated.\n"); | |
1f44a2a5 SJ |
2808 | mmc->f_min = freq[0]; |
2809 | mmc->f_max = freq[1]; | |
2810 | } | |
f95f3850 | 2811 | |
51da2240 YC |
2812 | /*if there are external regulators, get them*/ |
2813 | ret = mmc_regulator_get_supply(mmc); | |
0f3a47b8 | 2814 | if (ret) |
3cf890fc | 2815 | goto err_host_allocated; |
51da2240 YC |
2816 | |
2817 | if (!mmc->ocr_avail) | |
2818 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
f95f3850 | 2819 | |
fc3d7720 JC |
2820 | if (host->pdata->caps) |
2821 | mmc->caps = host->pdata->caps; | |
fc3d7720 | 2822 | |
6024e166 JC |
2823 | /* |
2824 | * Support MMC_CAP_ERASE by default. | |
2825 | * It needs to use trim/discard/erase commands. | |
2826 | */ | |
2827 | mmc->caps |= MMC_CAP_ERASE; | |
2828 | ||
ab269128 AK |
2829 | if (host->pdata->pm_caps) |
2830 | mmc->pm_caps = host->pdata->pm_caps; | |
2831 | ||
800d78bf TA |
2832 | if (host->dev->of_node) { |
2833 | ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); | |
2834 | if (ctrl_id < 0) | |
2835 | ctrl_id = 0; | |
2836 | } else { | |
2837 | ctrl_id = to_platform_device(host->dev)->id; | |
2838 | } | |
cb27a843 JH |
2839 | if (drv_data && drv_data->caps) |
2840 | mmc->caps |= drv_data->caps[ctrl_id]; | |
800d78bf | 2841 | |
4f408cc6 SJ |
2842 | if (host->pdata->caps2) |
2843 | mmc->caps2 = host->pdata->caps2; | |
4f408cc6 | 2844 | |
3cf890fc DA |
2845 | ret = mmc_of_parse(mmc); |
2846 | if (ret) | |
2847 | goto err_host_allocated; | |
f95f3850 | 2848 | |
32dba737 UH |
2849 | /* Process SDIO IRQs through the sdio_irq_work. */ |
2850 | if (mmc->caps & MMC_CAP_SDIO_IRQ) | |
2851 | mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD; | |
2852 | ||
2b708df2 | 2853 | /* Useful defaults if platform data is unset. */ |
3fc7eaef | 2854 | if (host->use_dma == TRANS_MODE_IDMAC) { |
2b708df2 | 2855 | mmc->max_segs = host->ring_size; |
225faf87 | 2856 | mmc->max_blk_size = 65535; |
2b708df2 JC |
2857 | mmc->max_seg_size = 0x1000; |
2858 | mmc->max_req_size = mmc->max_seg_size * host->ring_size; | |
2859 | mmc->max_blk_count = mmc->max_req_size / 512; | |
3fc7eaef SL |
2860 | } else if (host->use_dma == TRANS_MODE_EDMAC) { |
2861 | mmc->max_segs = 64; | |
225faf87 | 2862 | mmc->max_blk_size = 65535; |
3fc7eaef SL |
2863 | mmc->max_blk_count = 65535; |
2864 | mmc->max_req_size = | |
2865 | mmc->max_blk_size * mmc->max_blk_count; | |
2866 | mmc->max_seg_size = mmc->max_req_size; | |
f95f3850 | 2867 | } else { |
3fc7eaef | 2868 | /* TRANS_MODE_PIO */ |
2b708df2 | 2869 | mmc->max_segs = 64; |
225faf87 | 2870 | mmc->max_blk_size = 65535; /* BLKSIZ is 16 bits */ |
2b708df2 JC |
2871 | mmc->max_blk_count = 512; |
2872 | mmc->max_req_size = mmc->max_blk_size * | |
2873 | mmc->max_blk_count; | |
2874 | mmc->max_seg_size = mmc->max_req_size; | |
a39e5746 | 2875 | } |
f95f3850 | 2876 | |
c0834a58 | 2877 | dw_mci_get_cd(mmc); |
ae0eb348 | 2878 | |
0cea529d JC |
2879 | ret = mmc_add_host(mmc); |
2880 | if (ret) | |
3cf890fc | 2881 | goto err_host_allocated; |
f95f3850 WN |
2882 | |
2883 | #if defined(CONFIG_DEBUG_FS) | |
2884 | dw_mci_init_debugfs(slot); | |
2885 | #endif | |
2886 | ||
f95f3850 | 2887 | return 0; |
800d78bf | 2888 | |
3cf890fc | 2889 | err_host_allocated: |
800d78bf | 2890 | mmc_free_host(mmc); |
51da2240 | 2891 | return ret; |
f95f3850 WN |
2892 | } |
2893 | ||
e4a65ef7 | 2894 | static void dw_mci_cleanup_slot(struct dw_mci_slot *slot) |
f95f3850 | 2895 | { |
f95f3850 WN |
2896 | /* Debugfs stuff is cleaned up by mmc core */ |
2897 | mmc_remove_host(slot->mmc); | |
b23475fa | 2898 | slot->host->slot = NULL; |
f95f3850 WN |
2899 | mmc_free_host(slot->mmc); |
2900 | } | |
2901 | ||
2902 | static void dw_mci_init_dma(struct dw_mci *host) | |
2903 | { | |
69d99fdc | 2904 | int addr_config; |
3fc7eaef | 2905 | struct device *dev = host->dev; |
69d99fdc | 2906 | |
3fc7eaef SL |
2907 | /* |
2908 | * Check tansfer mode from HCON[17:16] | |
2909 | * Clear the ambiguous description of dw_mmc databook: | |
2910 | * 2b'00: No DMA Interface -> Actually means using Internal DMA block | |
2911 | * 2b'01: DesignWare DMA Interface -> Synopsys DW-DMA block | |
2912 | * 2b'10: Generic DMA Interface -> non-Synopsys generic DMA block | |
2913 | * 2b'11: Non DW DMA Interface -> pio only | |
2914 | * Compared to DesignWare DMA Interface, Generic DMA Interface has a | |
2915 | * simpler request/acknowledge handshake mechanism and both of them | |
2916 | * are regarded as external dma master for dw_mmc. | |
2917 | */ | |
2918 | host->use_dma = SDMMC_GET_TRANS_MODE(mci_readl(host, HCON)); | |
2919 | if (host->use_dma == DMA_INTERFACE_IDMA) { | |
2920 | host->use_dma = TRANS_MODE_IDMAC; | |
2921 | } else if (host->use_dma == DMA_INTERFACE_DWDMA || | |
2922 | host->use_dma == DMA_INTERFACE_GDMA) { | |
2923 | host->use_dma = TRANS_MODE_EDMAC; | |
2924 | } else { | |
f95f3850 WN |
2925 | goto no_dma; |
2926 | } | |
2927 | ||
2928 | /* Determine which DMA interface to use */ | |
3fc7eaef SL |
2929 | if (host->use_dma == TRANS_MODE_IDMAC) { |
2930 | /* | |
2931 | * Check ADDR_CONFIG bit in HCON to find | |
2932 | * IDMAC address bus width | |
2933 | */ | |
70692752 | 2934 | addr_config = SDMMC_GET_ADDR_CONFIG(mci_readl(host, HCON)); |
3fc7eaef SL |
2935 | |
2936 | if (addr_config == 1) { | |
2937 | /* host supports IDMAC in 64-bit address mode */ | |
2938 | host->dma_64bit_address = 1; | |
2939 | dev_info(host->dev, | |
2940 | "IDMAC supports 64-bit address mode.\n"); | |
2941 | if (!dma_set_mask(host->dev, DMA_BIT_MASK(64))) | |
2942 | dma_set_coherent_mask(host->dev, | |
2943 | DMA_BIT_MASK(64)); | |
2944 | } else { | |
2945 | /* host supports IDMAC in 32-bit address mode */ | |
2946 | host->dma_64bit_address = 0; | |
2947 | dev_info(host->dev, | |
2948 | "IDMAC supports 32-bit address mode.\n"); | |
2949 | } | |
f95f3850 | 2950 | |
3fc7eaef | 2951 | /* Alloc memory for sg translation */ |
cc190d4c SL |
2952 | host->sg_cpu = dmam_alloc_coherent(host->dev, |
2953 | DESC_RING_BUF_SZ, | |
3fc7eaef SL |
2954 | &host->sg_dma, GFP_KERNEL); |
2955 | if (!host->sg_cpu) { | |
2956 | dev_err(host->dev, | |
2957 | "%s: could not alloc DMA memory\n", | |
2958 | __func__); | |
2959 | goto no_dma; | |
2960 | } | |
2961 | ||
2962 | host->dma_ops = &dw_mci_idmac_ops; | |
2963 | dev_info(host->dev, "Using internal DMA controller.\n"); | |
2964 | } else { | |
2965 | /* TRANS_MODE_EDMAC: check dma bindings again */ | |
852ff5fe DW |
2966 | if ((device_property_read_string_array(dev, "dma-names", |
2967 | NULL, 0) < 0) || | |
2968 | !device_property_present(dev, "dmas")) { | |
3fc7eaef SL |
2969 | goto no_dma; |
2970 | } | |
2971 | host->dma_ops = &dw_mci_edmac_ops; | |
2972 | dev_info(host->dev, "Using external DMA controller.\n"); | |
2973 | } | |
f95f3850 | 2974 | |
e1631f98 JC |
2975 | if (host->dma_ops->init && host->dma_ops->start && |
2976 | host->dma_ops->stop && host->dma_ops->cleanup) { | |
f95f3850 | 2977 | if (host->dma_ops->init(host)) { |
0e3a22c0 SL |
2978 | dev_err(host->dev, "%s: Unable to initialize DMA Controller.\n", |
2979 | __func__); | |
f95f3850 WN |
2980 | goto no_dma; |
2981 | } | |
2982 | } else { | |
4a90920c | 2983 | dev_err(host->dev, "DMA initialization not found.\n"); |
f95f3850 WN |
2984 | goto no_dma; |
2985 | } | |
2986 | ||
f95f3850 WN |
2987 | return; |
2988 | ||
2989 | no_dma: | |
4a90920c | 2990 | dev_info(host->dev, "Using PIO mode.\n"); |
3fc7eaef | 2991 | host->use_dma = TRANS_MODE_PIO; |
f95f3850 WN |
2992 | } |
2993 | ||
5c935165 DA |
2994 | static void dw_mci_cmd11_timer(unsigned long arg) |
2995 | { | |
2996 | struct dw_mci *host = (struct dw_mci *)arg; | |
2997 | ||
fd674198 DA |
2998 | if (host->state != STATE_SENDING_CMD11) { |
2999 | dev_warn(host->dev, "Unexpected CMD11 timeout\n"); | |
3000 | return; | |
3001 | } | |
5c935165 DA |
3002 | |
3003 | host->cmd_status = SDMMC_INT_RTO; | |
3004 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
3005 | tasklet_schedule(&host->tasklet); | |
3006 | } | |
3007 | ||
03de1921 AK |
3008 | static void dw_mci_cto_timer(unsigned long arg) |
3009 | { | |
3010 | struct dw_mci *host = (struct dw_mci *)arg; | |
8892b705 DA |
3011 | unsigned long irqflags; |
3012 | u32 pending; | |
03de1921 | 3013 | |
8892b705 | 3014 | spin_lock_irqsave(&host->irq_lock, irqflags); |
03de1921 | 3015 | |
8892b705 DA |
3016 | /* |
3017 | * If somehow we have very bad interrupt latency it's remotely possible | |
3018 | * that the timer could fire while the interrupt is still pending or | |
3019 | * while the interrupt is midway through running. Let's be paranoid | |
3020 | * and detect those two cases. Note that this is paranoia is somewhat | |
3021 | * justified because in this function we don't actually cancel the | |
3022 | * pending command in the controller--we just assume it will never come. | |
3023 | */ | |
3024 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ | |
3025 | if (pending & (DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_CMD_DONE)) { | |
3026 | /* The interrupt should fire; no need to act but we can warn */ | |
3027 | dev_warn(host->dev, "Unexpected interrupt latency\n"); | |
3028 | goto exit; | |
3029 | } | |
3030 | if (test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) { | |
3031 | /* Presumably interrupt handler couldn't delete the timer */ | |
3032 | dev_warn(host->dev, "CTO timeout when already completed\n"); | |
3033 | goto exit; | |
3034 | } | |
3035 | ||
3036 | /* | |
3037 | * Continued paranoia to make sure we're in the state we expect. | |
3038 | * This paranoia isn't really justified but it seems good to be safe. | |
3039 | */ | |
03de1921 AK |
3040 | switch (host->state) { |
3041 | case STATE_SENDING_CMD11: | |
3042 | case STATE_SENDING_CMD: | |
3043 | case STATE_SENDING_STOP: | |
3044 | /* | |
3045 | * If CMD_DONE interrupt does NOT come in sending command | |
3046 | * state, we should notify the driver to terminate current | |
3047 | * transfer and report a command timeout to the core. | |
3048 | */ | |
3049 | host->cmd_status = SDMMC_INT_RTO; | |
3050 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
3051 | tasklet_schedule(&host->tasklet); | |
3052 | break; | |
3053 | default: | |
3054 | dev_warn(host->dev, "Unexpected command timeout, state %d\n", | |
3055 | host->state); | |
3056 | break; | |
3057 | } | |
8892b705 DA |
3058 | |
3059 | exit: | |
3060 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
03de1921 AK |
3061 | } |
3062 | ||
57e10486 AK |
3063 | static void dw_mci_dto_timer(unsigned long arg) |
3064 | { | |
3065 | struct dw_mci *host = (struct dw_mci *)arg; | |
93c23ae3 DA |
3066 | unsigned long irqflags; |
3067 | u32 pending; | |
3068 | ||
3069 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
57e10486 | 3070 | |
93c23ae3 DA |
3071 | /* |
3072 | * The DTO timer is much longer than the CTO timer, so it's even less | |
3073 | * likely that we'll these cases, but it pays to be paranoid. | |
3074 | */ | |
3075 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ | |
3076 | if (pending & SDMMC_INT_DATA_OVER) { | |
3077 | /* The interrupt should fire; no need to act but we can warn */ | |
3078 | dev_warn(host->dev, "Unexpected data interrupt latency\n"); | |
3079 | goto exit; | |
3080 | } | |
3081 | if (test_bit(EVENT_DATA_COMPLETE, &host->pending_events)) { | |
3082 | /* Presumably interrupt handler couldn't delete the timer */ | |
3083 | dev_warn(host->dev, "DTO timeout when already completed\n"); | |
3084 | goto exit; | |
3085 | } | |
3086 | ||
3087 | /* | |
3088 | * Continued paranoia to make sure we're in the state we expect. | |
3089 | * This paranoia isn't really justified but it seems good to be safe. | |
3090 | */ | |
57e10486 AK |
3091 | switch (host->state) { |
3092 | case STATE_SENDING_DATA: | |
3093 | case STATE_DATA_BUSY: | |
3094 | /* | |
3095 | * If DTO interrupt does NOT come in sending data state, | |
3096 | * we should notify the driver to terminate current transfer | |
3097 | * and report a data timeout to the core. | |
3098 | */ | |
3099 | host->data_status = SDMMC_INT_DRTO; | |
3100 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
3101 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
3102 | tasklet_schedule(&host->tasklet); | |
3103 | break; | |
3104 | default: | |
93c23ae3 DA |
3105 | dev_warn(host->dev, "Unexpected data timeout, state %d\n", |
3106 | host->state); | |
57e10486 AK |
3107 | break; |
3108 | } | |
93c23ae3 DA |
3109 | |
3110 | exit: | |
3111 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
57e10486 AK |
3112 | } |
3113 | ||
c91eab4b | 3114 | #ifdef CONFIG_OF |
c91eab4b TA |
3115 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) |
3116 | { | |
3117 | struct dw_mci_board *pdata; | |
3118 | struct device *dev = host->dev; | |
e95baf13 | 3119 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
e8cc37b8 | 3120 | int ret; |
3c6d89ea | 3121 | u32 clock_frequency; |
c91eab4b TA |
3122 | |
3123 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
bf3707ea | 3124 | if (!pdata) |
c91eab4b | 3125 | return ERR_PTR(-ENOMEM); |
c91eab4b | 3126 | |
d6786fef | 3127 | /* find reset controller when exist */ |
a93d6f31 | 3128 | pdata->rstc = devm_reset_control_get_optional_exclusive(dev, "reset"); |
d6786fef GX |
3129 | if (IS_ERR(pdata->rstc)) { |
3130 | if (PTR_ERR(pdata->rstc) == -EPROBE_DEFER) | |
3131 | return ERR_PTR(-EPROBE_DEFER); | |
3132 | } | |
3133 | ||
c91eab4b | 3134 | /* find out number of slots supported */ |
16f5df8b | 3135 | if (!device_property_read_u32(dev, "num-slots", &pdata->num_slots)) |
d30a8f7b | 3136 | dev_info(dev, "'num-slots' was deprecated.\n"); |
c91eab4b | 3137 | |
852ff5fe | 3138 | if (device_property_read_u32(dev, "fifo-depth", &pdata->fifo_depth)) |
0e3a22c0 SL |
3139 | dev_info(dev, |
3140 | "fifo-depth property not found, using value of FIFOTH register as default\n"); | |
c91eab4b | 3141 | |
852ff5fe DW |
3142 | device_property_read_u32(dev, "card-detect-delay", |
3143 | &pdata->detect_delay_ms); | |
c91eab4b | 3144 | |
852ff5fe | 3145 | device_property_read_u32(dev, "data-addr", &host->data_addr_override); |
a0361c1a | 3146 | |
852ff5fe | 3147 | if (device_property_present(dev, "fifo-watermark-aligned")) |
d6fced83 JN |
3148 | host->wm_aligned = true; |
3149 | ||
852ff5fe | 3150 | if (!device_property_read_u32(dev, "clock-frequency", &clock_frequency)) |
3c6d89ea DA |
3151 | pdata->bus_hz = clock_frequency; |
3152 | ||
cb27a843 JH |
3153 | if (drv_data && drv_data->parse_dt) { |
3154 | ret = drv_data->parse_dt(host); | |
800d78bf TA |
3155 | if (ret) |
3156 | return ERR_PTR(ret); | |
3157 | } | |
3158 | ||
c91eab4b TA |
3159 | return pdata; |
3160 | } | |
3161 | ||
3162 | #else /* CONFIG_OF */ | |
3163 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
3164 | { | |
3165 | return ERR_PTR(-EINVAL); | |
3166 | } | |
3167 | #endif /* CONFIG_OF */ | |
3168 | ||
fa0c3283 DA |
3169 | static void dw_mci_enable_cd(struct dw_mci *host) |
3170 | { | |
fa0c3283 DA |
3171 | unsigned long irqflags; |
3172 | u32 temp; | |
fa0c3283 | 3173 | |
e8cc37b8 SL |
3174 | /* |
3175 | * No need for CD if all slots have a non-error GPIO | |
3176 | * as well as broken card detection is found. | |
3177 | */ | |
e47c0b96 | 3178 | if (host->slot->mmc->caps & MMC_CAP_NEEDS_POLL) |
fa0c3283 DA |
3179 | return; |
3180 | ||
e47c0b96 | 3181 | if (mmc_gpio_get_cd(host->slot->mmc) < 0) { |
58870241 JC |
3182 | spin_lock_irqsave(&host->irq_lock, irqflags); |
3183 | temp = mci_readl(host, INTMASK); | |
3184 | temp |= SDMMC_INT_CD; | |
3185 | mci_writel(host, INTMASK, temp); | |
3186 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
3187 | } | |
fa0c3283 DA |
3188 | } |
3189 | ||
62ca8034 | 3190 | int dw_mci_probe(struct dw_mci *host) |
f95f3850 | 3191 | { |
e95baf13 | 3192 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
62ca8034 | 3193 | int width, i, ret = 0; |
f95f3850 WN |
3194 | u32 fifo_size; |
3195 | ||
c91eab4b TA |
3196 | if (!host->pdata) { |
3197 | host->pdata = dw_mci_parse_dt(host); | |
d6786fef GX |
3198 | if (PTR_ERR(host->pdata) == -EPROBE_DEFER) { |
3199 | return -EPROBE_DEFER; | |
3200 | } else if (IS_ERR(host->pdata)) { | |
c91eab4b TA |
3201 | dev_err(host->dev, "platform data not available\n"); |
3202 | return -EINVAL; | |
3203 | } | |
f95f3850 WN |
3204 | } |
3205 | ||
780f22af | 3206 | host->biu_clk = devm_clk_get(host->dev, "biu"); |
f90a0612 TA |
3207 | if (IS_ERR(host->biu_clk)) { |
3208 | dev_dbg(host->dev, "biu clock not available\n"); | |
3209 | } else { | |
3210 | ret = clk_prepare_enable(host->biu_clk); | |
3211 | if (ret) { | |
3212 | dev_err(host->dev, "failed to enable biu clock\n"); | |
f90a0612 TA |
3213 | return ret; |
3214 | } | |
3215 | } | |
3216 | ||
780f22af | 3217 | host->ciu_clk = devm_clk_get(host->dev, "ciu"); |
f90a0612 TA |
3218 | if (IS_ERR(host->ciu_clk)) { |
3219 | dev_dbg(host->dev, "ciu clock not available\n"); | |
3c6d89ea | 3220 | host->bus_hz = host->pdata->bus_hz; |
f90a0612 TA |
3221 | } else { |
3222 | ret = clk_prepare_enable(host->ciu_clk); | |
3223 | if (ret) { | |
3224 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
f90a0612 TA |
3225 | goto err_clk_biu; |
3226 | } | |
f90a0612 | 3227 | |
3c6d89ea DA |
3228 | if (host->pdata->bus_hz) { |
3229 | ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); | |
3230 | if (ret) | |
3231 | dev_warn(host->dev, | |
612de4c1 | 3232 | "Unable to set bus rate to %uHz\n", |
3c6d89ea DA |
3233 | host->pdata->bus_hz); |
3234 | } | |
f90a0612 | 3235 | host->bus_hz = clk_get_rate(host->ciu_clk); |
3c6d89ea | 3236 | } |
f90a0612 | 3237 | |
612de4c1 JC |
3238 | if (!host->bus_hz) { |
3239 | dev_err(host->dev, | |
3240 | "Platform data must supply bus speed\n"); | |
3241 | ret = -ENODEV; | |
3242 | goto err_clk_ciu; | |
3243 | } | |
3244 | ||
941e372d | 3245 | if (!IS_ERR(host->pdata->rstc)) { |
3246 | reset_control_assert(host->pdata->rstc); | |
3247 | usleep_range(10, 50); | |
3248 | reset_control_deassert(host->pdata->rstc); | |
3249 | } | |
3250 | ||
002f0d5c YK |
3251 | if (drv_data && drv_data->init) { |
3252 | ret = drv_data->init(host); | |
3253 | if (ret) { | |
3254 | dev_err(host->dev, | |
3255 | "implementation specific init failed\n"); | |
3256 | goto err_clk_ciu; | |
3257 | } | |
3258 | } | |
3259 | ||
5c935165 DA |
3260 | setup_timer(&host->cmd11_timer, |
3261 | dw_mci_cmd11_timer, (unsigned long)host); | |
3262 | ||
03de1921 AK |
3263 | setup_timer(&host->cto_timer, |
3264 | dw_mci_cto_timer, (unsigned long)host); | |
3265 | ||
16a34574 JC |
3266 | setup_timer(&host->dto_timer, |
3267 | dw_mci_dto_timer, (unsigned long)host); | |
57e10486 | 3268 | |
f95f3850 | 3269 | spin_lock_init(&host->lock); |
f8c58c11 | 3270 | spin_lock_init(&host->irq_lock); |
f95f3850 WN |
3271 | INIT_LIST_HEAD(&host->queue); |
3272 | ||
f95f3850 WN |
3273 | /* |
3274 | * Get the host data width - this assumes that HCON has been set with | |
3275 | * the correct values. | |
3276 | */ | |
70692752 | 3277 | i = SDMMC_GET_HDATA_WIDTH(mci_readl(host, HCON)); |
f95f3850 WN |
3278 | if (!i) { |
3279 | host->push_data = dw_mci_push_data16; | |
3280 | host->pull_data = dw_mci_pull_data16; | |
3281 | width = 16; | |
3282 | host->data_shift = 1; | |
3283 | } else if (i == 2) { | |
3284 | host->push_data = dw_mci_push_data64; | |
3285 | host->pull_data = dw_mci_pull_data64; | |
3286 | width = 64; | |
3287 | host->data_shift = 3; | |
3288 | } else { | |
3289 | /* Check for a reserved value, and warn if it is */ | |
3290 | WARN((i != 1), | |
3291 | "HCON reports a reserved host data width!\n" | |
3292 | "Defaulting to 32-bit access.\n"); | |
3293 | host->push_data = dw_mci_push_data32; | |
3294 | host->pull_data = dw_mci_pull_data32; | |
3295 | width = 32; | |
3296 | host->data_shift = 2; | |
3297 | } | |
3298 | ||
3299 | /* Reset all blocks */ | |
3744415c SL |
3300 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { |
3301 | ret = -ENODEV; | |
3302 | goto err_clk_ciu; | |
3303 | } | |
141a712a SJ |
3304 | |
3305 | host->dma_ops = host->pdata->dma_ops; | |
3306 | dw_mci_init_dma(host); | |
f95f3850 WN |
3307 | |
3308 | /* Clear the interrupts for the host controller */ | |
3309 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
3310 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
3311 | ||
3312 | /* Put in max timeout */ | |
3313 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
3314 | ||
3315 | /* | |
3316 | * FIFO threshold settings RxMark = fifo_size / 2 - 1, | |
3317 | * Tx Mark = fifo_size / 2 DMA Size = 8 | |
3318 | */ | |
b86d8253 JH |
3319 | if (!host->pdata->fifo_depth) { |
3320 | /* | |
3321 | * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may | |
3322 | * have been overwritten by the bootloader, just like we're | |
3323 | * about to do, so if you know the value for your hardware, you | |
3324 | * should put it in the platform data. | |
3325 | */ | |
3326 | fifo_size = mci_readl(host, FIFOTH); | |
8234e869 | 3327 | fifo_size = 1 + ((fifo_size >> 16) & 0xfff); |
b86d8253 JH |
3328 | } else { |
3329 | fifo_size = host->pdata->fifo_depth; | |
3330 | } | |
3331 | host->fifo_depth = fifo_size; | |
52426899 SJ |
3332 | host->fifoth_val = |
3333 | SDMMC_SET_FIFOTH(0x2, fifo_size / 2 - 1, fifo_size / 2); | |
e61cf118 | 3334 | mci_writel(host, FIFOTH, host->fifoth_val); |
f95f3850 WN |
3335 | |
3336 | /* disable clock to CIU */ | |
3337 | mci_writel(host, CLKENA, 0); | |
3338 | mci_writel(host, CLKSRC, 0); | |
3339 | ||
63008768 JH |
3340 | /* |
3341 | * In 2.40a spec, Data offset is changed. | |
3342 | * Need to check the version-id and set data-offset for DATA register. | |
3343 | */ | |
3344 | host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); | |
3345 | dev_info(host->dev, "Version ID is %04x\n", host->verid); | |
3346 | ||
a0361c1a JN |
3347 | if (host->data_addr_override) |
3348 | host->fifo_reg = host->regs + host->data_addr_override; | |
3349 | else if (host->verid < DW_MMC_240A) | |
76184ac1 | 3350 | host->fifo_reg = host->regs + DATA_OFFSET; |
63008768 | 3351 | else |
76184ac1 | 3352 | host->fifo_reg = host->regs + DATA_240A_OFFSET; |
63008768 | 3353 | |
f95f3850 | 3354 | tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); |
780f22af SJ |
3355 | ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, |
3356 | host->irq_flags, "dw-mci", host); | |
f95f3850 | 3357 | if (ret) |
6130e7a9 | 3358 | goto err_dmaunmap; |
f95f3850 | 3359 | |
2da1d7f2 | 3360 | /* |
fa0c3283 | 3361 | * Enable interrupts for command done, data over, data empty, |
2da1d7f2 YC |
3362 | * receive ready and error such as transmit, receive timeout, crc error |
3363 | */ | |
2da1d7f2 YC |
3364 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | |
3365 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
fa0c3283 | 3366 | DW_MCI_ERROR_FLAGS); |
0e3a22c0 SL |
3367 | /* Enable mci interrupt */ |
3368 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); | |
2da1d7f2 | 3369 | |
0e3a22c0 SL |
3370 | dev_info(host->dev, |
3371 | "DW MMC controller at irq %d,%d bit host data width,%u deep fifo\n", | |
2da1d7f2 YC |
3372 | host->irq, width, fifo_size); |
3373 | ||
f95f3850 | 3374 | /* We need at least one slot to succeed */ |
e4a65ef7 | 3375 | ret = dw_mci_init_slot(host); |
58870241 JC |
3376 | if (ret) { |
3377 | dev_dbg(host->dev, "slot %d init failed\n", i); | |
6130e7a9 | 3378 | goto err_dmaunmap; |
f95f3850 WN |
3379 | } |
3380 | ||
b793f658 DA |
3381 | /* Now that slots are all setup, we can enable card detect */ |
3382 | dw_mci_enable_cd(host); | |
3383 | ||
f95f3850 WN |
3384 | return 0; |
3385 | ||
f95f3850 WN |
3386 | err_dmaunmap: |
3387 | if (host->use_dma && host->dma_ops->exit) | |
3388 | host->dma_ops->exit(host); | |
f90a0612 | 3389 | |
d6786fef GX |
3390 | if (!IS_ERR(host->pdata->rstc)) |
3391 | reset_control_assert(host->pdata->rstc); | |
3392 | ||
f90a0612 | 3393 | err_clk_ciu: |
7037f3be | 3394 | clk_disable_unprepare(host->ciu_clk); |
780f22af | 3395 | |
f90a0612 | 3396 | err_clk_biu: |
7037f3be | 3397 | clk_disable_unprepare(host->biu_clk); |
780f22af | 3398 | |
f95f3850 WN |
3399 | return ret; |
3400 | } | |
62ca8034 | 3401 | EXPORT_SYMBOL(dw_mci_probe); |
f95f3850 | 3402 | |
62ca8034 | 3403 | void dw_mci_remove(struct dw_mci *host) |
f95f3850 | 3404 | { |
e4a65ef7 | 3405 | dev_dbg(host->dev, "remove slot\n"); |
b23475fa | 3406 | if (host->slot) |
e4a65ef7 | 3407 | dw_mci_cleanup_slot(host->slot); |
f95f3850 | 3408 | |
048fd7e6 PT |
3409 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
3410 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
3411 | ||
f95f3850 WN |
3412 | /* disable clock to CIU */ |
3413 | mci_writel(host, CLKENA, 0); | |
3414 | mci_writel(host, CLKSRC, 0); | |
3415 | ||
f95f3850 WN |
3416 | if (host->use_dma && host->dma_ops->exit) |
3417 | host->dma_ops->exit(host); | |
3418 | ||
d6786fef GX |
3419 | if (!IS_ERR(host->pdata->rstc)) |
3420 | reset_control_assert(host->pdata->rstc); | |
3421 | ||
7037f3be JC |
3422 | clk_disable_unprepare(host->ciu_clk); |
3423 | clk_disable_unprepare(host->biu_clk); | |
f95f3850 | 3424 | } |
62ca8034 SH |
3425 | EXPORT_SYMBOL(dw_mci_remove); |
3426 | ||
3427 | ||
f95f3850 | 3428 | |
e9ed8835 | 3429 | #ifdef CONFIG_PM |
ed24e1ff | 3430 | int dw_mci_runtime_suspend(struct device *dev) |
f95f3850 | 3431 | { |
ed24e1ff SL |
3432 | struct dw_mci *host = dev_get_drvdata(dev); |
3433 | ||
3fc7eaef SL |
3434 | if (host->use_dma && host->dma_ops->exit) |
3435 | host->dma_ops->exit(host); | |
3436 | ||
ed24e1ff SL |
3437 | clk_disable_unprepare(host->ciu_clk); |
3438 | ||
42f989c0 JC |
3439 | if (host->slot && |
3440 | (mmc_can_gpio_cd(host->slot->mmc) || | |
3441 | !mmc_card_is_removable(host->slot->mmc))) | |
ed24e1ff SL |
3442 | clk_disable_unprepare(host->biu_clk); |
3443 | ||
f95f3850 WN |
3444 | return 0; |
3445 | } | |
ed24e1ff | 3446 | EXPORT_SYMBOL(dw_mci_runtime_suspend); |
f95f3850 | 3447 | |
ed24e1ff | 3448 | int dw_mci_runtime_resume(struct device *dev) |
f95f3850 | 3449 | { |
b23475fa | 3450 | int ret = 0; |
ed24e1ff | 3451 | struct dw_mci *host = dev_get_drvdata(dev); |
f95f3850 | 3452 | |
42f989c0 JC |
3453 | if (host->slot && |
3454 | (mmc_can_gpio_cd(host->slot->mmc) || | |
3455 | !mmc_card_is_removable(host->slot->mmc))) { | |
ed24e1ff SL |
3456 | ret = clk_prepare_enable(host->biu_clk); |
3457 | if (ret) | |
3458 | return ret; | |
e61cf118 JC |
3459 | } |
3460 | ||
ed24e1ff SL |
3461 | ret = clk_prepare_enable(host->ciu_clk); |
3462 | if (ret) | |
df9bcc2b JS |
3463 | goto err; |
3464 | ||
3465 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { | |
3466 | clk_disable_unprepare(host->ciu_clk); | |
3467 | ret = -ENODEV; | |
3468 | goto err; | |
3469 | } | |
ed24e1ff | 3470 | |
3bfe619d | 3471 | if (host->use_dma && host->dma_ops->init) |
141a712a SJ |
3472 | host->dma_ops->init(host); |
3473 | ||
52426899 SJ |
3474 | /* |
3475 | * Restore the initial value at FIFOTH register | |
3476 | * And Invalidate the prev_blksz with zero | |
3477 | */ | |
ed24e1ff SL |
3478 | mci_writel(host, FIFOTH, host->fifoth_val); |
3479 | host->prev_blksz = 0; | |
e61cf118 | 3480 | |
2eb2944f DA |
3481 | /* Put in max timeout */ |
3482 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
3483 | ||
e61cf118 JC |
3484 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
3485 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
3486 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
fa0c3283 | 3487 | DW_MCI_ERROR_FLAGS); |
e61cf118 JC |
3488 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); |
3489 | ||
0e3a22c0 | 3490 | |
e47c0b96 JC |
3491 | if (host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER) |
3492 | dw_mci_set_ios(host->slot->mmc, &host->slot->mmc->ios); | |
e9748e03 | 3493 | |
58870241 | 3494 | /* Force setup bus to guarantee available clock output */ |
e47c0b96 | 3495 | dw_mci_setup_bus(host->slot, true); |
fa0c3283 DA |
3496 | |
3497 | /* Now that slots are all setup, we can enable card detect */ | |
3498 | dw_mci_enable_cd(host); | |
3499 | ||
df9bcc2b JS |
3500 | return 0; |
3501 | ||
3502 | err: | |
42f989c0 JC |
3503 | if (host->slot && |
3504 | (mmc_can_gpio_cd(host->slot->mmc) || | |
3505 | !mmc_card_is_removable(host->slot->mmc))) | |
df9bcc2b JS |
3506 | clk_disable_unprepare(host->biu_clk); |
3507 | ||
ed24e1ff | 3508 | return ret; |
e9ed8835 SL |
3509 | } |
3510 | EXPORT_SYMBOL(dw_mci_runtime_resume); | |
3511 | #endif /* CONFIG_PM */ | |
6fe8890d | 3512 | |
f95f3850 WN |
3513 | static int __init dw_mci_init(void) |
3514 | { | |
8e1c4e4d | 3515 | pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); |
62ca8034 | 3516 | return 0; |
f95f3850 WN |
3517 | } |
3518 | ||
3519 | static void __exit dw_mci_exit(void) | |
3520 | { | |
f95f3850 WN |
3521 | } |
3522 | ||
3523 | module_init(dw_mci_init); | |
3524 | module_exit(dw_mci_exit); | |
3525 | ||
3526 | MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); | |
3527 | MODULE_AUTHOR("NXP Semiconductor VietNam"); | |
3528 | MODULE_AUTHOR("Imagination Technologies Ltd"); | |
3529 | MODULE_LICENSE("GPL v2"); |