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Commit | Line | Data |
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f95f3850 WN |
1 | /* |
2 | * Synopsys DesignWare Multimedia Card Interface driver | |
3 | * (Based on NXP driver for lpc 31xx) | |
4 | * | |
5 | * Copyright (C) 2009 NXP Semiconductors | |
6 | * Copyright (C) 2009, 2010 Imagination Technologies Ltd. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/blkdev.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/debugfs.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/platform_device.h> | |
f95f3850 WN |
25 | #include <linux/seq_file.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/stat.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/irq.h> | |
b24c8b26 | 30 | #include <linux/mmc/card.h> |
f95f3850 WN |
31 | #include <linux/mmc/host.h> |
32 | #include <linux/mmc/mmc.h> | |
01730558 | 33 | #include <linux/mmc/sd.h> |
90c2143a | 34 | #include <linux/mmc/sdio.h> |
f95f3850 WN |
35 | #include <linux/mmc/dw_mmc.h> |
36 | #include <linux/bitops.h> | |
c07946a3 | 37 | #include <linux/regulator/consumer.h> |
c91eab4b | 38 | #include <linux/of.h> |
55a6ceb2 | 39 | #include <linux/of_gpio.h> |
bf626e55 | 40 | #include <linux/mmc/slot-gpio.h> |
f95f3850 WN |
41 | |
42 | #include "dw_mmc.h" | |
43 | ||
44 | /* Common flag combinations */ | |
3f7eec62 | 45 | #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \ |
f95f3850 | 46 | SDMMC_INT_HTO | SDMMC_INT_SBE | \ |
7a3c5677 | 47 | SDMMC_INT_EBE | SDMMC_INT_HLE) |
f95f3850 | 48 | #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ |
7a3c5677 | 49 | SDMMC_INT_RESP_ERR | SDMMC_INT_HLE) |
f95f3850 | 50 | #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ |
7a3c5677 | 51 | DW_MCI_CMD_ERROR_FLAGS) |
f95f3850 WN |
52 | #define DW_MCI_SEND_STATUS 1 |
53 | #define DW_MCI_RECV_STATUS 2 | |
54 | #define DW_MCI_DMA_THRESHOLD 16 | |
55 | ||
1f44a2a5 SJ |
56 | #define DW_MCI_FREQ_MAX 200000000 /* unit: HZ */ |
57 | #define DW_MCI_FREQ_MIN 400000 /* unit: HZ */ | |
58 | ||
fc79a4d6 JS |
59 | #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \ |
60 | SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ | |
61 | SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \ | |
62 | SDMMC_IDMAC_INT_TI) | |
63 | ||
69d99fdc PT |
64 | struct idmac_desc_64addr { |
65 | u32 des0; /* Control Descriptor */ | |
66 | ||
67 | u32 des1; /* Reserved */ | |
68 | ||
69 | u32 des2; /*Buffer sizes */ | |
70 | #define IDMAC_64ADDR_SET_BUFFER1_SIZE(d, s) \ | |
6687c42f BD |
71 | ((d)->des2 = ((d)->des2 & cpu_to_le32(0x03ffe000)) | \ |
72 | ((cpu_to_le32(s)) & cpu_to_le32(0x1fff))) | |
69d99fdc PT |
73 | |
74 | u32 des3; /* Reserved */ | |
75 | ||
76 | u32 des4; /* Lower 32-bits of Buffer Address Pointer 1*/ | |
77 | u32 des5; /* Upper 32-bits of Buffer Address Pointer 1*/ | |
78 | ||
79 | u32 des6; /* Lower 32-bits of Next Descriptor Address */ | |
80 | u32 des7; /* Upper 32-bits of Next Descriptor Address */ | |
81 | }; | |
82 | ||
f95f3850 | 83 | struct idmac_desc { |
6687c42f | 84 | __le32 des0; /* Control Descriptor */ |
f95f3850 WN |
85 | #define IDMAC_DES0_DIC BIT(1) |
86 | #define IDMAC_DES0_LD BIT(2) | |
87 | #define IDMAC_DES0_FD BIT(3) | |
88 | #define IDMAC_DES0_CH BIT(4) | |
89 | #define IDMAC_DES0_ER BIT(5) | |
90 | #define IDMAC_DES0_CES BIT(30) | |
91 | #define IDMAC_DES0_OWN BIT(31) | |
92 | ||
6687c42f | 93 | __le32 des1; /* Buffer sizes */ |
f95f3850 | 94 | #define IDMAC_SET_BUFFER1_SIZE(d, s) \ |
9b7bbe10 | 95 | ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff)) |
f95f3850 | 96 | |
6687c42f | 97 | __le32 des2; /* buffer 1 physical address */ |
f95f3850 | 98 | |
6687c42f | 99 | __le32 des3; /* buffer 2 physical address */ |
f95f3850 | 100 | }; |
5959b32e AB |
101 | |
102 | /* Each descriptor can transfer up to 4KB of data in chained mode */ | |
103 | #define DW_MCI_DESC_DATA_LENGTH 0x1000 | |
f95f3850 | 104 | |
3a33a94c | 105 | static bool dw_mci_reset(struct dw_mci *host); |
536f6b91 | 106 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset); |
0bdbd0e8 | 107 | static int dw_mci_card_busy(struct mmc_host *mmc); |
56f6911c | 108 | static int dw_mci_get_cd(struct mmc_host *mmc); |
31bff450 | 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 | { | |
166 | seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); | |
167 | seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); | |
168 | seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); | |
169 | seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); | |
170 | seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); | |
171 | seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | static int dw_mci_regs_open(struct inode *inode, struct file *file) | |
177 | { | |
178 | return single_open(file, dw_mci_regs_show, inode->i_private); | |
179 | } | |
180 | ||
181 | static const struct file_operations dw_mci_regs_fops = { | |
182 | .owner = THIS_MODULE, | |
183 | .open = dw_mci_regs_open, | |
184 | .read = seq_read, | |
185 | .llseek = seq_lseek, | |
186 | .release = single_release, | |
187 | }; | |
188 | ||
189 | static void dw_mci_init_debugfs(struct dw_mci_slot *slot) | |
190 | { | |
191 | struct mmc_host *mmc = slot->mmc; | |
192 | struct dw_mci *host = slot->host; | |
193 | struct dentry *root; | |
194 | struct dentry *node; | |
195 | ||
196 | root = mmc->debugfs_root; | |
197 | if (!root) | |
198 | return; | |
199 | ||
200 | node = debugfs_create_file("regs", S_IRUSR, root, host, | |
201 | &dw_mci_regs_fops); | |
202 | if (!node) | |
203 | goto err; | |
204 | ||
205 | node = debugfs_create_file("req", S_IRUSR, root, slot, | |
206 | &dw_mci_req_fops); | |
207 | if (!node) | |
208 | goto err; | |
209 | ||
210 | node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); | |
211 | if (!node) | |
212 | goto err; | |
213 | ||
214 | node = debugfs_create_x32("pending_events", S_IRUSR, root, | |
215 | (u32 *)&host->pending_events); | |
216 | if (!node) | |
217 | goto err; | |
218 | ||
219 | node = debugfs_create_x32("completed_events", S_IRUSR, root, | |
220 | (u32 *)&host->completed_events); | |
221 | if (!node) | |
222 | goto err; | |
223 | ||
224 | return; | |
225 | ||
226 | err: | |
227 | dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); | |
228 | } | |
229 | #endif /* defined(CONFIG_DEBUG_FS) */ | |
230 | ||
01730558 DA |
231 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg); |
232 | ||
f95f3850 WN |
233 | static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) |
234 | { | |
235 | struct mmc_data *data; | |
800d78bf | 236 | struct dw_mci_slot *slot = mmc_priv(mmc); |
01730558 | 237 | struct dw_mci *host = slot->host; |
f95f3850 | 238 | u32 cmdr; |
f95f3850 | 239 | |
0e3a22c0 | 240 | cmd->error = -EINPROGRESS; |
f95f3850 WN |
241 | cmdr = cmd->opcode; |
242 | ||
90c2143a SJ |
243 | if (cmd->opcode == MMC_STOP_TRANSMISSION || |
244 | cmd->opcode == MMC_GO_IDLE_STATE || | |
245 | cmd->opcode == MMC_GO_INACTIVE_STATE || | |
246 | (cmd->opcode == SD_IO_RW_DIRECT && | |
247 | ((cmd->arg >> 9) & 0x1FFFF) == SDIO_CCCR_ABORT)) | |
f95f3850 | 248 | cmdr |= SDMMC_CMD_STOP; |
4a1b27ad JC |
249 | else if (cmd->opcode != MMC_SEND_STATUS && cmd->data) |
250 | cmdr |= SDMMC_CMD_PRV_DAT_WAIT; | |
f95f3850 | 251 | |
01730558 DA |
252 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
253 | u32 clk_en_a; | |
254 | ||
255 | /* Special bit makes CMD11 not die */ | |
256 | cmdr |= SDMMC_CMD_VOLT_SWITCH; | |
257 | ||
258 | /* Change state to continue to handle CMD11 weirdness */ | |
259 | WARN_ON(slot->host->state != STATE_SENDING_CMD); | |
260 | slot->host->state = STATE_SENDING_CMD11; | |
261 | ||
262 | /* | |
263 | * We need to disable low power mode (automatic clock stop) | |
264 | * while doing voltage switch so we don't confuse the card, | |
265 | * since stopping the clock is a specific part of the UHS | |
266 | * voltage change dance. | |
267 | * | |
268 | * Note that low power mode (SDMMC_CLKEN_LOW_PWR) will be | |
269 | * unconditionally turned back on in dw_mci_setup_bus() if it's | |
270 | * ever called with a non-zero clock. That shouldn't happen | |
271 | * until the voltage change is all done. | |
272 | */ | |
273 | clk_en_a = mci_readl(host, CLKENA); | |
274 | clk_en_a &= ~(SDMMC_CLKEN_LOW_PWR << slot->id); | |
275 | mci_writel(host, CLKENA, clk_en_a); | |
276 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
277 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
278 | } | |
279 | ||
f95f3850 WN |
280 | if (cmd->flags & MMC_RSP_PRESENT) { |
281 | /* We expect a response, so set this bit */ | |
282 | cmdr |= SDMMC_CMD_RESP_EXP; | |
283 | if (cmd->flags & MMC_RSP_136) | |
284 | cmdr |= SDMMC_CMD_RESP_LONG; | |
285 | } | |
286 | ||
287 | if (cmd->flags & MMC_RSP_CRC) | |
288 | cmdr |= SDMMC_CMD_RESP_CRC; | |
289 | ||
290 | data = cmd->data; | |
291 | if (data) { | |
292 | cmdr |= SDMMC_CMD_DAT_EXP; | |
f95f3850 WN |
293 | if (data->flags & MMC_DATA_WRITE) |
294 | cmdr |= SDMMC_CMD_DAT_WR; | |
295 | } | |
296 | ||
aaaaeb7a JC |
297 | if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &slot->flags)) |
298 | cmdr |= SDMMC_CMD_USE_HOLD_REG; | |
800d78bf | 299 | |
f95f3850 WN |
300 | return cmdr; |
301 | } | |
302 | ||
90c2143a SJ |
303 | static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) |
304 | { | |
305 | struct mmc_command *stop; | |
306 | u32 cmdr; | |
307 | ||
308 | if (!cmd->data) | |
309 | return 0; | |
310 | ||
311 | stop = &host->stop_abort; | |
312 | cmdr = cmd->opcode; | |
313 | memset(stop, 0, sizeof(struct mmc_command)); | |
314 | ||
315 | if (cmdr == MMC_READ_SINGLE_BLOCK || | |
316 | cmdr == MMC_READ_MULTIPLE_BLOCK || | |
317 | cmdr == MMC_WRITE_BLOCK || | |
6c2c6506 UH |
318 | cmdr == MMC_WRITE_MULTIPLE_BLOCK || |
319 | cmdr == MMC_SEND_TUNING_BLOCK || | |
320 | cmdr == MMC_SEND_TUNING_BLOCK_HS200) { | |
90c2143a SJ |
321 | stop->opcode = MMC_STOP_TRANSMISSION; |
322 | stop->arg = 0; | |
323 | stop->flags = MMC_RSP_R1B | MMC_CMD_AC; | |
324 | } else if (cmdr == SD_IO_RW_EXTENDED) { | |
325 | stop->opcode = SD_IO_RW_DIRECT; | |
326 | stop->arg |= (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
327 | ((cmd->arg >> 28) & 0x7); | |
328 | stop->flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; | |
329 | } else { | |
330 | return 0; | |
331 | } | |
332 | ||
333 | cmdr = stop->opcode | SDMMC_CMD_STOP | | |
334 | SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; | |
335 | ||
336 | return cmdr; | |
337 | } | |
338 | ||
0bdbd0e8 DA |
339 | static void dw_mci_wait_while_busy(struct dw_mci *host, u32 cmd_flags) |
340 | { | |
341 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
342 | ||
343 | /* | |
344 | * Databook says that before issuing a new data transfer command | |
345 | * we need to check to see if the card is busy. Data transfer commands | |
346 | * all have SDMMC_CMD_PRV_DAT_WAIT set, so we'll key off that. | |
347 | * | |
348 | * ...also allow sending for SDMMC_CMD_VOLT_SWITCH where busy is | |
349 | * expected. | |
350 | */ | |
351 | if ((cmd_flags & SDMMC_CMD_PRV_DAT_WAIT) && | |
352 | !(cmd_flags & SDMMC_CMD_VOLT_SWITCH)) { | |
353 | while (mci_readl(host, STATUS) & SDMMC_STATUS_BUSY) { | |
354 | if (time_after(jiffies, timeout)) { | |
355 | /* Command will fail; we'll pass error then */ | |
356 | dev_err(host->dev, "Busy; trying anyway\n"); | |
357 | break; | |
358 | } | |
359 | udelay(10); | |
360 | } | |
361 | } | |
362 | } | |
363 | ||
f95f3850 WN |
364 | static void dw_mci_start_command(struct dw_mci *host, |
365 | struct mmc_command *cmd, u32 cmd_flags) | |
366 | { | |
367 | host->cmd = cmd; | |
4a90920c | 368 | dev_vdbg(host->dev, |
f95f3850 WN |
369 | "start command: ARGR=0x%08x CMDR=0x%08x\n", |
370 | cmd->arg, cmd_flags); | |
371 | ||
372 | mci_writel(host, CMDARG, cmd->arg); | |
0e3a22c0 | 373 | wmb(); /* drain writebuffer */ |
0bdbd0e8 | 374 | dw_mci_wait_while_busy(host, cmd_flags); |
f95f3850 WN |
375 | |
376 | mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); | |
377 | } | |
378 | ||
90c2143a | 379 | static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) |
f95f3850 | 380 | { |
90c2143a | 381 | struct mmc_command *stop = data->stop ? data->stop : &host->stop_abort; |
0e3a22c0 | 382 | |
90c2143a | 383 | dw_mci_start_command(host, stop, host->stop_cmdr); |
f95f3850 WN |
384 | } |
385 | ||
386 | /* DMA interface functions */ | |
387 | static void dw_mci_stop_dma(struct dw_mci *host) | |
388 | { | |
03e8cb53 | 389 | if (host->using_dma) { |
f95f3850 WN |
390 | host->dma_ops->stop(host); |
391 | host->dma_ops->cleanup(host); | |
f95f3850 | 392 | } |
aa50f259 SJ |
393 | |
394 | /* Data transfer was stopped by the interrupt handler */ | |
395 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
f95f3850 WN |
396 | } |
397 | ||
9aa51408 SJ |
398 | static int dw_mci_get_dma_dir(struct mmc_data *data) |
399 | { | |
400 | if (data->flags & MMC_DATA_WRITE) | |
401 | return DMA_TO_DEVICE; | |
402 | else | |
403 | return DMA_FROM_DEVICE; | |
404 | } | |
405 | ||
f95f3850 WN |
406 | static void dw_mci_dma_cleanup(struct dw_mci *host) |
407 | { | |
408 | struct mmc_data *data = host->data; | |
409 | ||
410 | if (data) | |
9aa51408 | 411 | if (!data->host_cookie) |
4a90920c | 412 | dma_unmap_sg(host->dev, |
9aa51408 SJ |
413 | data->sg, |
414 | data->sg_len, | |
415 | dw_mci_get_dma_dir(data)); | |
f95f3850 WN |
416 | } |
417 | ||
5ce9d961 SJ |
418 | static void dw_mci_idmac_reset(struct dw_mci *host) |
419 | { | |
420 | u32 bmod = mci_readl(host, BMOD); | |
421 | /* Software reset of DMA */ | |
422 | bmod |= SDMMC_IDMAC_SWRESET; | |
423 | mci_writel(host, BMOD, bmod); | |
424 | } | |
425 | ||
f95f3850 WN |
426 | static void dw_mci_idmac_stop_dma(struct dw_mci *host) |
427 | { | |
428 | u32 temp; | |
429 | ||
430 | /* Disable and reset the IDMAC interface */ | |
431 | temp = mci_readl(host, CTRL); | |
432 | temp &= ~SDMMC_CTRL_USE_IDMAC; | |
433 | temp |= SDMMC_CTRL_DMA_RESET; | |
434 | mci_writel(host, CTRL, temp); | |
435 | ||
436 | /* Stop the IDMAC running */ | |
437 | temp = mci_readl(host, BMOD); | |
a5289a43 | 438 | temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); |
5ce9d961 | 439 | temp |= SDMMC_IDMAC_SWRESET; |
f95f3850 WN |
440 | mci_writel(host, BMOD, temp); |
441 | } | |
442 | ||
3fc7eaef | 443 | static void dw_mci_dmac_complete_dma(void *arg) |
f95f3850 | 444 | { |
3fc7eaef | 445 | struct dw_mci *host = arg; |
f95f3850 WN |
446 | struct mmc_data *data = host->data; |
447 | ||
4a90920c | 448 | dev_vdbg(host->dev, "DMA complete\n"); |
f95f3850 | 449 | |
3fc7eaef SL |
450 | if ((host->use_dma == TRANS_MODE_EDMAC) && |
451 | data && (data->flags & MMC_DATA_READ)) | |
452 | /* Invalidate cache after read */ | |
453 | dma_sync_sg_for_cpu(mmc_dev(host->cur_slot->mmc), | |
454 | data->sg, | |
455 | data->sg_len, | |
456 | DMA_FROM_DEVICE); | |
457 | ||
f95f3850 WN |
458 | host->dma_ops->cleanup(host); |
459 | ||
460 | /* | |
461 | * If the card was removed, data will be NULL. No point in trying to | |
462 | * send the stop command or waiting for NBUSY in this case. | |
463 | */ | |
464 | if (data) { | |
465 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
466 | tasklet_schedule(&host->tasklet); | |
467 | } | |
468 | } | |
469 | ||
470 | static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, | |
471 | unsigned int sg_len) | |
472 | { | |
5959b32e | 473 | unsigned int desc_len; |
f95f3850 | 474 | int i; |
0e3a22c0 | 475 | |
69d99fdc | 476 | if (host->dma_64bit_address == 1) { |
5959b32e AB |
477 | struct idmac_desc_64addr *desc_first, *desc_last, *desc; |
478 | ||
479 | desc_first = desc_last = desc = host->sg_cpu; | |
69d99fdc | 480 | |
5959b32e | 481 | for (i = 0; i < sg_len; i++) { |
69d99fdc | 482 | unsigned int length = sg_dma_len(&data->sg[i]); |
0e3a22c0 | 483 | |
69d99fdc | 484 | u64 mem_addr = sg_dma_address(&data->sg[i]); |
f95f3850 | 485 | |
5959b32e AB |
486 | for ( ; length ; desc++) { |
487 | desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? | |
488 | length : DW_MCI_DESC_DATA_LENGTH; | |
489 | ||
490 | length -= desc_len; | |
491 | ||
492 | /* | |
493 | * Set the OWN bit and disable interrupts | |
494 | * for this descriptor | |
495 | */ | |
496 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | | |
497 | IDMAC_DES0_CH; | |
498 | ||
499 | /* Buffer length */ | |
500 | IDMAC_64ADDR_SET_BUFFER1_SIZE(desc, desc_len); | |
501 | ||
502 | /* Physical address to DMA to/from */ | |
503 | desc->des4 = mem_addr & 0xffffffff; | |
504 | desc->des5 = mem_addr >> 32; | |
505 | ||
506 | /* Update physical address for the next desc */ | |
507 | mem_addr += desc_len; | |
508 | ||
509 | /* Save pointer to the last descriptor */ | |
510 | desc_last = desc; | |
511 | } | |
69d99fdc | 512 | } |
f95f3850 | 513 | |
69d99fdc | 514 | /* Set first descriptor */ |
5959b32e | 515 | desc_first->des0 |= IDMAC_DES0_FD; |
f95f3850 | 516 | |
69d99fdc | 517 | /* Set last descriptor */ |
5959b32e AB |
518 | desc_last->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); |
519 | desc_last->des0 |= IDMAC_DES0_LD; | |
f95f3850 | 520 | |
69d99fdc | 521 | } else { |
5959b32e AB |
522 | struct idmac_desc *desc_first, *desc_last, *desc; |
523 | ||
524 | desc_first = desc_last = desc = host->sg_cpu; | |
69d99fdc | 525 | |
5959b32e | 526 | for (i = 0; i < sg_len; i++) { |
69d99fdc | 527 | unsigned int length = sg_dma_len(&data->sg[i]); |
0e3a22c0 | 528 | |
69d99fdc PT |
529 | u32 mem_addr = sg_dma_address(&data->sg[i]); |
530 | ||
5959b32e AB |
531 | for ( ; length ; desc++) { |
532 | desc_len = (length <= DW_MCI_DESC_DATA_LENGTH) ? | |
533 | length : DW_MCI_DESC_DATA_LENGTH; | |
534 | ||
535 | length -= desc_len; | |
536 | ||
537 | /* | |
538 | * Set the OWN bit and disable interrupts | |
539 | * for this descriptor | |
540 | */ | |
541 | desc->des0 = cpu_to_le32(IDMAC_DES0_OWN | | |
542 | IDMAC_DES0_DIC | | |
543 | IDMAC_DES0_CH); | |
544 | ||
545 | /* Buffer length */ | |
546 | IDMAC_SET_BUFFER1_SIZE(desc, desc_len); | |
f95f3850 | 547 | |
5959b32e AB |
548 | /* Physical address to DMA to/from */ |
549 | desc->des2 = cpu_to_le32(mem_addr); | |
550 | ||
551 | /* Update physical address for the next desc */ | |
552 | mem_addr += desc_len; | |
553 | ||
554 | /* Save pointer to the last descriptor */ | |
555 | desc_last = desc; | |
556 | } | |
69d99fdc PT |
557 | } |
558 | ||
559 | /* Set first descriptor */ | |
5959b32e | 560 | desc_first->des0 |= cpu_to_le32(IDMAC_DES0_FD); |
f95f3850 | 561 | |
69d99fdc | 562 | /* Set last descriptor */ |
5959b32e AB |
563 | desc_last->des0 &= cpu_to_le32(~(IDMAC_DES0_CH | |
564 | IDMAC_DES0_DIC)); | |
565 | desc_last->des0 |= cpu_to_le32(IDMAC_DES0_LD); | |
69d99fdc | 566 | } |
f95f3850 | 567 | |
0e3a22c0 | 568 | wmb(); /* drain writebuffer */ |
f95f3850 WN |
569 | } |
570 | ||
3fc7eaef | 571 | static int dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) |
f95f3850 WN |
572 | { |
573 | u32 temp; | |
574 | ||
575 | dw_mci_translate_sglist(host, host->data, sg_len); | |
576 | ||
536f6b91 SR |
577 | /* Make sure to reset DMA in case we did PIO before this */ |
578 | dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET); | |
579 | dw_mci_idmac_reset(host); | |
580 | ||
f95f3850 WN |
581 | /* Select IDMAC interface */ |
582 | temp = mci_readl(host, CTRL); | |
583 | temp |= SDMMC_CTRL_USE_IDMAC; | |
584 | mci_writel(host, CTRL, temp); | |
585 | ||
0e3a22c0 | 586 | /* drain writebuffer */ |
f95f3850 WN |
587 | wmb(); |
588 | ||
589 | /* Enable the IDMAC */ | |
590 | temp = mci_readl(host, BMOD); | |
a5289a43 | 591 | temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; |
f95f3850 WN |
592 | mci_writel(host, BMOD, temp); |
593 | ||
594 | /* Start it running */ | |
595 | mci_writel(host, PLDMND, 1); | |
3fc7eaef SL |
596 | |
597 | return 0; | |
f95f3850 WN |
598 | } |
599 | ||
600 | static int dw_mci_idmac_init(struct dw_mci *host) | |
601 | { | |
897b69e7 | 602 | int i; |
f95f3850 | 603 | |
69d99fdc PT |
604 | if (host->dma_64bit_address == 1) { |
605 | struct idmac_desc_64addr *p; | |
606 | /* Number of descriptors in the ring buffer */ | |
607 | host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc_64addr); | |
608 | ||
609 | /* Forward link the descriptor list */ | |
610 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; | |
611 | i++, p++) { | |
612 | p->des6 = (host->sg_dma + | |
613 | (sizeof(struct idmac_desc_64addr) * | |
614 | (i + 1))) & 0xffffffff; | |
615 | ||
616 | p->des7 = (u64)(host->sg_dma + | |
617 | (sizeof(struct idmac_desc_64addr) * | |
618 | (i + 1))) >> 32; | |
619 | /* Initialize reserved and buffer size fields to "0" */ | |
620 | p->des1 = 0; | |
621 | p->des2 = 0; | |
622 | p->des3 = 0; | |
623 | } | |
f95f3850 | 624 | |
69d99fdc PT |
625 | /* Set the last descriptor as the end-of-ring descriptor */ |
626 | p->des6 = host->sg_dma & 0xffffffff; | |
627 | p->des7 = (u64)host->sg_dma >> 32; | |
628 | p->des0 = IDMAC_DES0_ER; | |
f95f3850 | 629 | |
69d99fdc PT |
630 | } else { |
631 | struct idmac_desc *p; | |
632 | /* Number of descriptors in the ring buffer */ | |
633 | host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); | |
634 | ||
635 | /* Forward link the descriptor list */ | |
0e3a22c0 SL |
636 | for (i = 0, p = host->sg_cpu; |
637 | i < host->ring_size - 1; | |
638 | i++, p++) { | |
6687c42f BD |
639 | p->des3 = cpu_to_le32(host->sg_dma + |
640 | (sizeof(struct idmac_desc) * (i + 1))); | |
4b244724 ZG |
641 | p->des1 = 0; |
642 | } | |
69d99fdc PT |
643 | |
644 | /* Set the last descriptor as the end-of-ring descriptor */ | |
6687c42f BD |
645 | p->des3 = cpu_to_le32(host->sg_dma); |
646 | p->des0 = cpu_to_le32(IDMAC_DES0_ER); | |
69d99fdc | 647 | } |
f95f3850 | 648 | |
5ce9d961 | 649 | dw_mci_idmac_reset(host); |
141a712a | 650 | |
69d99fdc PT |
651 | if (host->dma_64bit_address == 1) { |
652 | /* Mask out interrupts - get Tx & Rx complete only */ | |
653 | mci_writel(host, IDSTS64, IDMAC_INT_CLR); | |
654 | mci_writel(host, IDINTEN64, SDMMC_IDMAC_INT_NI | | |
655 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
656 | ||
657 | /* Set the descriptor base address */ | |
658 | mci_writel(host, DBADDRL, host->sg_dma & 0xffffffff); | |
659 | mci_writel(host, DBADDRU, (u64)host->sg_dma >> 32); | |
660 | ||
661 | } else { | |
662 | /* Mask out interrupts - get Tx & Rx complete only */ | |
663 | mci_writel(host, IDSTS, IDMAC_INT_CLR); | |
664 | mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | | |
665 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
666 | ||
667 | /* Set the descriptor base address */ | |
668 | mci_writel(host, DBADDR, host->sg_dma); | |
669 | } | |
f95f3850 | 670 | |
f95f3850 WN |
671 | return 0; |
672 | } | |
673 | ||
8e2b36ea | 674 | static const struct dw_mci_dma_ops dw_mci_idmac_ops = { |
885c3e80 SJ |
675 | .init = dw_mci_idmac_init, |
676 | .start = dw_mci_idmac_start_dma, | |
677 | .stop = dw_mci_idmac_stop_dma, | |
3fc7eaef SL |
678 | .complete = dw_mci_dmac_complete_dma, |
679 | .cleanup = dw_mci_dma_cleanup, | |
680 | }; | |
681 | ||
682 | static void dw_mci_edmac_stop_dma(struct dw_mci *host) | |
683 | { | |
ab925a31 | 684 | dmaengine_terminate_async(host->dms->ch); |
3fc7eaef SL |
685 | } |
686 | ||
687 | static int dw_mci_edmac_start_dma(struct dw_mci *host, | |
688 | unsigned int sg_len) | |
689 | { | |
690 | struct dma_slave_config cfg; | |
691 | struct dma_async_tx_descriptor *desc = NULL; | |
692 | struct scatterlist *sgl = host->data->sg; | |
693 | const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; | |
694 | u32 sg_elems = host->data->sg_len; | |
695 | u32 fifoth_val; | |
696 | u32 fifo_offset = host->fifo_reg - host->regs; | |
697 | int ret = 0; | |
698 | ||
699 | /* Set external dma config: burst size, burst width */ | |
260b3164 | 700 | cfg.dst_addr = host->phy_regs + fifo_offset; |
3fc7eaef SL |
701 | cfg.src_addr = cfg.dst_addr; |
702 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
703 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
704 | ||
705 | /* Match burst msize with external dma config */ | |
706 | fifoth_val = mci_readl(host, FIFOTH); | |
707 | cfg.dst_maxburst = mszs[(fifoth_val >> 28) & 0x7]; | |
708 | cfg.src_maxburst = cfg.dst_maxburst; | |
709 | ||
710 | if (host->data->flags & MMC_DATA_WRITE) | |
711 | cfg.direction = DMA_MEM_TO_DEV; | |
712 | else | |
713 | cfg.direction = DMA_DEV_TO_MEM; | |
714 | ||
715 | ret = dmaengine_slave_config(host->dms->ch, &cfg); | |
716 | if (ret) { | |
717 | dev_err(host->dev, "Failed to config edmac.\n"); | |
718 | return -EBUSY; | |
719 | } | |
720 | ||
721 | desc = dmaengine_prep_slave_sg(host->dms->ch, sgl, | |
722 | sg_len, cfg.direction, | |
723 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
724 | if (!desc) { | |
725 | dev_err(host->dev, "Can't prepare slave sg.\n"); | |
726 | return -EBUSY; | |
727 | } | |
728 | ||
729 | /* Set dw_mci_dmac_complete_dma as callback */ | |
730 | desc->callback = dw_mci_dmac_complete_dma; | |
731 | desc->callback_param = (void *)host; | |
732 | dmaengine_submit(desc); | |
733 | ||
734 | /* Flush cache before write */ | |
735 | if (host->data->flags & MMC_DATA_WRITE) | |
736 | dma_sync_sg_for_device(mmc_dev(host->cur_slot->mmc), sgl, | |
737 | sg_elems, DMA_TO_DEVICE); | |
738 | ||
739 | dma_async_issue_pending(host->dms->ch); | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | static int dw_mci_edmac_init(struct dw_mci *host) | |
745 | { | |
746 | /* Request external dma channel */ | |
747 | host->dms = kzalloc(sizeof(struct dw_mci_dma_slave), GFP_KERNEL); | |
748 | if (!host->dms) | |
749 | return -ENOMEM; | |
750 | ||
751 | host->dms->ch = dma_request_slave_channel(host->dev, "rx-tx"); | |
752 | if (!host->dms->ch) { | |
4539d36e | 753 | dev_err(host->dev, "Failed to get external DMA channel.\n"); |
3fc7eaef SL |
754 | kfree(host->dms); |
755 | host->dms = NULL; | |
756 | return -ENXIO; | |
757 | } | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | static void dw_mci_edmac_exit(struct dw_mci *host) | |
763 | { | |
764 | if (host->dms) { | |
765 | if (host->dms->ch) { | |
766 | dma_release_channel(host->dms->ch); | |
767 | host->dms->ch = NULL; | |
768 | } | |
769 | kfree(host->dms); | |
770 | host->dms = NULL; | |
771 | } | |
772 | } | |
773 | ||
774 | static const struct dw_mci_dma_ops dw_mci_edmac_ops = { | |
775 | .init = dw_mci_edmac_init, | |
776 | .exit = dw_mci_edmac_exit, | |
777 | .start = dw_mci_edmac_start_dma, | |
778 | .stop = dw_mci_edmac_stop_dma, | |
779 | .complete = dw_mci_dmac_complete_dma, | |
885c3e80 SJ |
780 | .cleanup = dw_mci_dma_cleanup, |
781 | }; | |
885c3e80 | 782 | |
9aa51408 SJ |
783 | static int dw_mci_pre_dma_transfer(struct dw_mci *host, |
784 | struct mmc_data *data, | |
785 | bool next) | |
f95f3850 WN |
786 | { |
787 | struct scatterlist *sg; | |
9aa51408 | 788 | unsigned int i, sg_len; |
03e8cb53 | 789 | |
9aa51408 SJ |
790 | if (!next && data->host_cookie) |
791 | return data->host_cookie; | |
f95f3850 WN |
792 | |
793 | /* | |
794 | * We don't do DMA on "complex" transfers, i.e. with | |
795 | * non-word-aligned buffers or lengths. Also, we don't bother | |
796 | * with all the DMA setup overhead for short transfers. | |
797 | */ | |
798 | if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) | |
799 | return -EINVAL; | |
9aa51408 | 800 | |
f95f3850 WN |
801 | if (data->blksz & 3) |
802 | return -EINVAL; | |
803 | ||
804 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
805 | if (sg->offset & 3 || sg->length & 3) | |
806 | return -EINVAL; | |
807 | } | |
808 | ||
4a90920c | 809 | sg_len = dma_map_sg(host->dev, |
9aa51408 SJ |
810 | data->sg, |
811 | data->sg_len, | |
812 | dw_mci_get_dma_dir(data)); | |
813 | if (sg_len == 0) | |
814 | return -EINVAL; | |
03e8cb53 | 815 | |
9aa51408 SJ |
816 | if (next) |
817 | data->host_cookie = sg_len; | |
f95f3850 | 818 | |
9aa51408 SJ |
819 | return sg_len; |
820 | } | |
821 | ||
9aa51408 SJ |
822 | static void dw_mci_pre_req(struct mmc_host *mmc, |
823 | struct mmc_request *mrq, | |
824 | bool is_first_req) | |
825 | { | |
826 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
827 | struct mmc_data *data = mrq->data; | |
828 | ||
829 | if (!slot->host->use_dma || !data) | |
830 | return; | |
831 | ||
832 | if (data->host_cookie) { | |
833 | data->host_cookie = 0; | |
834 | return; | |
835 | } | |
836 | ||
837 | if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) | |
838 | data->host_cookie = 0; | |
839 | } | |
840 | ||
841 | static void dw_mci_post_req(struct mmc_host *mmc, | |
842 | struct mmc_request *mrq, | |
843 | int err) | |
844 | { | |
845 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
846 | struct mmc_data *data = mrq->data; | |
847 | ||
848 | if (!slot->host->use_dma || !data) | |
849 | return; | |
850 | ||
851 | if (data->host_cookie) | |
4a90920c | 852 | dma_unmap_sg(slot->host->dev, |
9aa51408 SJ |
853 | data->sg, |
854 | data->sg_len, | |
855 | dw_mci_get_dma_dir(data)); | |
856 | data->host_cookie = 0; | |
857 | } | |
858 | ||
52426899 SJ |
859 | static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) |
860 | { | |
52426899 SJ |
861 | unsigned int blksz = data->blksz; |
862 | const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; | |
863 | u32 fifo_width = 1 << host->data_shift; | |
864 | u32 blksz_depth = blksz / fifo_width, fifoth_val; | |
865 | u32 msize = 0, rx_wmark = 1, tx_wmark, tx_wmark_invers; | |
0e3a22c0 | 866 | int idx = ARRAY_SIZE(mszs) - 1; |
52426899 | 867 | |
3fc7eaef SL |
868 | /* pio should ship this scenario */ |
869 | if (!host->use_dma) | |
870 | return; | |
871 | ||
52426899 SJ |
872 | tx_wmark = (host->fifo_depth) / 2; |
873 | tx_wmark_invers = host->fifo_depth - tx_wmark; | |
874 | ||
875 | /* | |
876 | * MSIZE is '1', | |
877 | * if blksz is not a multiple of the FIFO width | |
878 | */ | |
879 | if (blksz % fifo_width) { | |
880 | msize = 0; | |
881 | rx_wmark = 1; | |
882 | goto done; | |
883 | } | |
884 | ||
885 | do { | |
886 | if (!((blksz_depth % mszs[idx]) || | |
887 | (tx_wmark_invers % mszs[idx]))) { | |
888 | msize = idx; | |
889 | rx_wmark = mszs[idx] - 1; | |
890 | break; | |
891 | } | |
892 | } while (--idx > 0); | |
893 | /* | |
894 | * If idx is '0', it won't be tried | |
895 | * Thus, initial values are uesed | |
896 | */ | |
897 | done: | |
898 | fifoth_val = SDMMC_SET_FIFOTH(msize, rx_wmark, tx_wmark); | |
899 | mci_writel(host, FIFOTH, fifoth_val); | |
52426899 SJ |
900 | } |
901 | ||
f1d2736c SJ |
902 | static void dw_mci_ctrl_rd_thld(struct dw_mci *host, struct mmc_data *data) |
903 | { | |
904 | unsigned int blksz = data->blksz; | |
905 | u32 blksz_depth, fifo_depth; | |
906 | u16 thld_size; | |
907 | ||
908 | WARN_ON(!(data->flags & MMC_DATA_READ)); | |
909 | ||
66dfd101 JH |
910 | /* |
911 | * CDTHRCTL doesn't exist prior to 240A (in fact that register offset is | |
912 | * in the FIFO region, so we really shouldn't access it). | |
913 | */ | |
914 | if (host->verid < DW_MMC_240A) | |
915 | return; | |
916 | ||
f1d2736c | 917 | if (host->timing != MMC_TIMING_MMC_HS200 && |
488b8d63 | 918 | host->timing != MMC_TIMING_MMC_HS400 && |
f1d2736c SJ |
919 | host->timing != MMC_TIMING_UHS_SDR104) |
920 | goto disable; | |
921 | ||
922 | blksz_depth = blksz / (1 << host->data_shift); | |
923 | fifo_depth = host->fifo_depth; | |
924 | ||
925 | if (blksz_depth > fifo_depth) | |
926 | goto disable; | |
927 | ||
928 | /* | |
929 | * If (blksz_depth) >= (fifo_depth >> 1), should be 'thld_size <= blksz' | |
930 | * If (blksz_depth) < (fifo_depth >> 1), should be thld_size = blksz | |
931 | * Currently just choose blksz. | |
932 | */ | |
933 | thld_size = blksz; | |
934 | mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(thld_size, 1)); | |
935 | return; | |
936 | ||
937 | disable: | |
938 | mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(0, 0)); | |
939 | } | |
940 | ||
9aa51408 SJ |
941 | static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) |
942 | { | |
f8c58c11 | 943 | unsigned long irqflags; |
9aa51408 SJ |
944 | int sg_len; |
945 | u32 temp; | |
946 | ||
947 | host->using_dma = 0; | |
948 | ||
949 | /* If we don't have a channel, we can't do DMA */ | |
950 | if (!host->use_dma) | |
951 | return -ENODEV; | |
952 | ||
953 | sg_len = dw_mci_pre_dma_transfer(host, data, 0); | |
a99aa9b9 SJ |
954 | if (sg_len < 0) { |
955 | host->dma_ops->stop(host); | |
9aa51408 | 956 | return sg_len; |
a99aa9b9 | 957 | } |
9aa51408 SJ |
958 | |
959 | host->using_dma = 1; | |
f95f3850 | 960 | |
3fc7eaef SL |
961 | if (host->use_dma == TRANS_MODE_IDMAC) |
962 | dev_vdbg(host->dev, | |
963 | "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", | |
964 | (unsigned long)host->sg_cpu, | |
965 | (unsigned long)host->sg_dma, | |
966 | sg_len); | |
f95f3850 | 967 | |
52426899 SJ |
968 | /* |
969 | * Decide the MSIZE and RX/TX Watermark. | |
970 | * If current block size is same with previous size, | |
971 | * no need to update fifoth. | |
972 | */ | |
973 | if (host->prev_blksz != data->blksz) | |
974 | dw_mci_adjust_fifoth(host, data); | |
975 | ||
f95f3850 WN |
976 | /* Enable the DMA interface */ |
977 | temp = mci_readl(host, CTRL); | |
978 | temp |= SDMMC_CTRL_DMA_ENABLE; | |
979 | mci_writel(host, CTRL, temp); | |
980 | ||
981 | /* Disable RX/TX IRQs, let DMA handle it */ | |
f8c58c11 | 982 | spin_lock_irqsave(&host->irq_lock, irqflags); |
f95f3850 WN |
983 | temp = mci_readl(host, INTMASK); |
984 | temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); | |
985 | mci_writel(host, INTMASK, temp); | |
f8c58c11 | 986 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
f95f3850 | 987 | |
3fc7eaef SL |
988 | if (host->dma_ops->start(host, sg_len)) { |
989 | /* We can't do DMA */ | |
990 | dev_err(host->dev, "%s: failed to start DMA.\n", __func__); | |
991 | return -ENODEV; | |
992 | } | |
f95f3850 WN |
993 | |
994 | return 0; | |
995 | } | |
996 | ||
997 | static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) | |
998 | { | |
f8c58c11 | 999 | unsigned long irqflags; |
0e3a22c0 | 1000 | int flags = SG_MITER_ATOMIC; |
f95f3850 WN |
1001 | u32 temp; |
1002 | ||
1003 | data->error = -EINPROGRESS; | |
1004 | ||
1005 | WARN_ON(host->data); | |
1006 | host->sg = NULL; | |
1007 | host->data = data; | |
1008 | ||
f1d2736c | 1009 | if (data->flags & MMC_DATA_READ) { |
55c5efbc | 1010 | host->dir_status = DW_MCI_RECV_STATUS; |
f1d2736c SJ |
1011 | dw_mci_ctrl_rd_thld(host, data); |
1012 | } else { | |
55c5efbc | 1013 | host->dir_status = DW_MCI_SEND_STATUS; |
f1d2736c | 1014 | } |
55c5efbc | 1015 | |
f95f3850 | 1016 | if (dw_mci_submit_data_dma(host, data)) { |
f9c2a0dc SJ |
1017 | if (host->data->flags & MMC_DATA_READ) |
1018 | flags |= SG_MITER_TO_SG; | |
1019 | else | |
1020 | flags |= SG_MITER_FROM_SG; | |
1021 | ||
1022 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
f95f3850 | 1023 | host->sg = data->sg; |
34b664a2 JH |
1024 | host->part_buf_start = 0; |
1025 | host->part_buf_count = 0; | |
f95f3850 | 1026 | |
b40af3aa | 1027 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); |
f8c58c11 DA |
1028 | |
1029 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
f95f3850 WN |
1030 | temp = mci_readl(host, INTMASK); |
1031 | temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; | |
1032 | mci_writel(host, INTMASK, temp); | |
f8c58c11 | 1033 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
f95f3850 WN |
1034 | |
1035 | temp = mci_readl(host, CTRL); | |
1036 | temp &= ~SDMMC_CTRL_DMA_ENABLE; | |
1037 | mci_writel(host, CTRL, temp); | |
52426899 SJ |
1038 | |
1039 | /* | |
1040 | * Use the initial fifoth_val for PIO mode. | |
1041 | * If next issued data may be transfered by DMA mode, | |
1042 | * prev_blksz should be invalidated. | |
1043 | */ | |
1044 | mci_writel(host, FIFOTH, host->fifoth_val); | |
1045 | host->prev_blksz = 0; | |
1046 | } else { | |
1047 | /* | |
1048 | * Keep the current block size. | |
1049 | * It will be used to decide whether to update | |
1050 | * fifoth register next time. | |
1051 | */ | |
1052 | host->prev_blksz = data->blksz; | |
f95f3850 WN |
1053 | } |
1054 | } | |
1055 | ||
1056 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) | |
1057 | { | |
1058 | struct dw_mci *host = slot->host; | |
1059 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
1060 | unsigned int cmd_status = 0; | |
1061 | ||
1062 | mci_writel(host, CMDARG, arg); | |
0e3a22c0 | 1063 | wmb(); /* drain writebuffer */ |
0bdbd0e8 | 1064 | dw_mci_wait_while_busy(host, cmd); |
f95f3850 WN |
1065 | mci_writel(host, CMD, SDMMC_CMD_START | cmd); |
1066 | ||
1067 | while (time_before(jiffies, timeout)) { | |
1068 | cmd_status = mci_readl(host, CMD); | |
1069 | if (!(cmd_status & SDMMC_CMD_START)) | |
1070 | return; | |
1071 | } | |
1072 | dev_err(&slot->mmc->class_dev, | |
1073 | "Timeout sending command (cmd %#x arg %#x status %#x)\n", | |
1074 | cmd, arg, cmd_status); | |
1075 | } | |
1076 | ||
ab269128 | 1077 | static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) |
f95f3850 WN |
1078 | { |
1079 | struct dw_mci *host = slot->host; | |
fdf492a1 | 1080 | unsigned int clock = slot->clock; |
f95f3850 | 1081 | u32 div; |
9623b5b9 | 1082 | u32 clk_en_a; |
01730558 DA |
1083 | u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT; |
1084 | ||
1085 | /* We must continue to set bit 28 in CMD until the change is complete */ | |
1086 | if (host->state == STATE_WAITING_CMD11_DONE) | |
1087 | sdmmc_cmd_bits |= SDMMC_CMD_VOLT_SWITCH; | |
f95f3850 | 1088 | |
fdf492a1 DA |
1089 | if (!clock) { |
1090 | mci_writel(host, CLKENA, 0); | |
01730558 | 1091 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
fdf492a1 DA |
1092 | } else if (clock != host->current_speed || force_clkinit) { |
1093 | div = host->bus_hz / clock; | |
1094 | if (host->bus_hz % clock && host->bus_hz > clock) | |
f95f3850 WN |
1095 | /* |
1096 | * move the + 1 after the divide to prevent | |
1097 | * over-clocking the card. | |
1098 | */ | |
e419990b SJ |
1099 | div += 1; |
1100 | ||
fdf492a1 | 1101 | div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; |
f95f3850 | 1102 | |
fdf492a1 DA |
1103 | if ((clock << div) != slot->__clk_old || force_clkinit) |
1104 | dev_info(&slot->mmc->class_dev, | |
1105 | "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", | |
1106 | slot->id, host->bus_hz, clock, | |
1107 | div ? ((host->bus_hz / div) >> 1) : | |
1108 | host->bus_hz, div); | |
f95f3850 WN |
1109 | |
1110 | /* disable clock */ | |
1111 | mci_writel(host, CLKENA, 0); | |
1112 | mci_writel(host, CLKSRC, 0); | |
1113 | ||
1114 | /* inform CIU */ | |
01730558 | 1115 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 WN |
1116 | |
1117 | /* set clock to desired speed */ | |
1118 | mci_writel(host, CLKDIV, div); | |
1119 | ||
1120 | /* inform CIU */ | |
01730558 | 1121 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 | 1122 | |
9623b5b9 DA |
1123 | /* enable clock; only low power if no SDIO */ |
1124 | clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; | |
b24c8b26 | 1125 | if (!test_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags)) |
9623b5b9 DA |
1126 | clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; |
1127 | mci_writel(host, CLKENA, clk_en_a); | |
f95f3850 WN |
1128 | |
1129 | /* inform CIU */ | |
01730558 | 1130 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 | 1131 | |
fdf492a1 DA |
1132 | /* keep the clock with reflecting clock dividor */ |
1133 | slot->__clk_old = clock << div; | |
f95f3850 WN |
1134 | } |
1135 | ||
fdf492a1 DA |
1136 | host->current_speed = clock; |
1137 | ||
f95f3850 | 1138 | /* Set the current slot bus width */ |
1d56c453 | 1139 | mci_writel(host, CTYPE, (slot->ctype << slot->id)); |
f95f3850 WN |
1140 | } |
1141 | ||
053b3ce6 SJ |
1142 | static void __dw_mci_start_request(struct dw_mci *host, |
1143 | struct dw_mci_slot *slot, | |
1144 | struct mmc_command *cmd) | |
f95f3850 WN |
1145 | { |
1146 | struct mmc_request *mrq; | |
f95f3850 WN |
1147 | struct mmc_data *data; |
1148 | u32 cmdflags; | |
1149 | ||
1150 | mrq = slot->mrq; | |
f95f3850 | 1151 | |
f95f3850 WN |
1152 | host->cur_slot = slot; |
1153 | host->mrq = mrq; | |
1154 | ||
1155 | host->pending_events = 0; | |
1156 | host->completed_events = 0; | |
e352c813 | 1157 | host->cmd_status = 0; |
f95f3850 | 1158 | host->data_status = 0; |
e352c813 | 1159 | host->dir_status = 0; |
f95f3850 | 1160 | |
053b3ce6 | 1161 | data = cmd->data; |
f95f3850 | 1162 | if (data) { |
f16afa88 | 1163 | mci_writel(host, TMOUT, 0xFFFFFFFF); |
f95f3850 WN |
1164 | mci_writel(host, BYTCNT, data->blksz*data->blocks); |
1165 | mci_writel(host, BLKSIZ, data->blksz); | |
1166 | } | |
1167 | ||
f95f3850 WN |
1168 | cmdflags = dw_mci_prepare_command(slot->mmc, cmd); |
1169 | ||
1170 | /* this is the first command, send the initialization clock */ | |
1171 | if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) | |
1172 | cmdflags |= SDMMC_CMD_INIT; | |
1173 | ||
1174 | if (data) { | |
1175 | dw_mci_submit_data(host, data); | |
0e3a22c0 | 1176 | wmb(); /* drain writebuffer */ |
f95f3850 WN |
1177 | } |
1178 | ||
1179 | dw_mci_start_command(host, cmd, cmdflags); | |
1180 | ||
5c935165 | 1181 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
49ba0302 DA |
1182 | unsigned long irqflags; |
1183 | ||
5c935165 | 1184 | /* |
8886a6fd DA |
1185 | * Databook says to fail after 2ms w/ no response, but evidence |
1186 | * shows that sometimes the cmd11 interrupt takes over 130ms. | |
1187 | * We'll set to 500ms, plus an extra jiffy just in case jiffies | |
1188 | * is just about to roll over. | |
49ba0302 DA |
1189 | * |
1190 | * We do this whole thing under spinlock and only if the | |
1191 | * command hasn't already completed (indicating the the irq | |
1192 | * already ran so we don't want the timeout). | |
5c935165 | 1193 | */ |
49ba0302 DA |
1194 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1195 | if (!test_bit(EVENT_CMD_COMPLETE, &host->pending_events)) | |
1196 | mod_timer(&host->cmd11_timer, | |
1197 | jiffies + msecs_to_jiffies(500) + 1); | |
1198 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
5c935165 DA |
1199 | } |
1200 | ||
f95f3850 WN |
1201 | if (mrq->stop) |
1202 | host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); | |
90c2143a SJ |
1203 | else |
1204 | host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); | |
f95f3850 WN |
1205 | } |
1206 | ||
053b3ce6 SJ |
1207 | static void dw_mci_start_request(struct dw_mci *host, |
1208 | struct dw_mci_slot *slot) | |
1209 | { | |
1210 | struct mmc_request *mrq = slot->mrq; | |
1211 | struct mmc_command *cmd; | |
1212 | ||
1213 | cmd = mrq->sbc ? mrq->sbc : mrq->cmd; | |
1214 | __dw_mci_start_request(host, slot, cmd); | |
1215 | } | |
1216 | ||
7456caae | 1217 | /* must be called with host->lock held */ |
f95f3850 WN |
1218 | static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, |
1219 | struct mmc_request *mrq) | |
1220 | { | |
1221 | dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", | |
1222 | host->state); | |
1223 | ||
f95f3850 WN |
1224 | slot->mrq = mrq; |
1225 | ||
01730558 DA |
1226 | if (host->state == STATE_WAITING_CMD11_DONE) { |
1227 | dev_warn(&slot->mmc->class_dev, | |
1228 | "Voltage change didn't complete\n"); | |
1229 | /* | |
1230 | * this case isn't expected to happen, so we can | |
1231 | * either crash here or just try to continue on | |
1232 | * in the closest possible state | |
1233 | */ | |
1234 | host->state = STATE_IDLE; | |
1235 | } | |
1236 | ||
f95f3850 WN |
1237 | if (host->state == STATE_IDLE) { |
1238 | host->state = STATE_SENDING_CMD; | |
1239 | dw_mci_start_request(host, slot); | |
1240 | } else { | |
1241 | list_add_tail(&slot->queue_node, &host->queue); | |
1242 | } | |
f95f3850 WN |
1243 | } |
1244 | ||
1245 | static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1246 | { | |
1247 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1248 | struct dw_mci *host = slot->host; | |
1249 | ||
1250 | WARN_ON(slot->mrq); | |
1251 | ||
7456caae JH |
1252 | /* |
1253 | * The check for card presence and queueing of the request must be | |
1254 | * atomic, otherwise the card could be removed in between and the | |
1255 | * request wouldn't fail until another card was inserted. | |
1256 | */ | |
7456caae | 1257 | |
56f6911c | 1258 | if (!dw_mci_get_cd(mmc)) { |
f95f3850 WN |
1259 | mrq->cmd->error = -ENOMEDIUM; |
1260 | mmc_request_done(mmc, mrq); | |
1261 | return; | |
1262 | } | |
1263 | ||
56f6911c SL |
1264 | spin_lock_bh(&host->lock); |
1265 | ||
f95f3850 | 1266 | dw_mci_queue_request(host, slot, mrq); |
7456caae JH |
1267 | |
1268 | spin_unlock_bh(&host->lock); | |
f95f3850 WN |
1269 | } |
1270 | ||
1271 | static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1272 | { | |
1273 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
e95baf13 | 1274 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
41babf75 | 1275 | u32 regs; |
51da2240 | 1276 | int ret; |
f95f3850 | 1277 | |
f95f3850 | 1278 | switch (ios->bus_width) { |
f95f3850 WN |
1279 | case MMC_BUS_WIDTH_4: |
1280 | slot->ctype = SDMMC_CTYPE_4BIT; | |
1281 | break; | |
c9b2a06f JC |
1282 | case MMC_BUS_WIDTH_8: |
1283 | slot->ctype = SDMMC_CTYPE_8BIT; | |
1284 | break; | |
b2f7cb45 JC |
1285 | default: |
1286 | /* set default 1 bit mode */ | |
1287 | slot->ctype = SDMMC_CTYPE_1BIT; | |
f95f3850 WN |
1288 | } |
1289 | ||
3f514291 SJ |
1290 | regs = mci_readl(slot->host, UHS_REG); |
1291 | ||
41babf75 | 1292 | /* DDR mode set */ |
80113132 | 1293 | if (ios->timing == MMC_TIMING_MMC_DDR52 || |
7cc8d580 | 1294 | ios->timing == MMC_TIMING_UHS_DDR50 || |
80113132 | 1295 | ios->timing == MMC_TIMING_MMC_HS400) |
c69042a5 | 1296 | regs |= ((0x1 << slot->id) << 16); |
3f514291 | 1297 | else |
c69042a5 | 1298 | regs &= ~((0x1 << slot->id) << 16); |
3f514291 SJ |
1299 | |
1300 | mci_writel(slot->host, UHS_REG, regs); | |
f1d2736c | 1301 | slot->host->timing = ios->timing; |
41babf75 | 1302 | |
fdf492a1 DA |
1303 | /* |
1304 | * Use mirror of ios->clock to prevent race with mmc | |
1305 | * core ios update when finding the minimum. | |
1306 | */ | |
1307 | slot->clock = ios->clock; | |
f95f3850 | 1308 | |
cb27a843 JH |
1309 | if (drv_data && drv_data->set_ios) |
1310 | drv_data->set_ios(slot->host, ios); | |
800d78bf | 1311 | |
f95f3850 WN |
1312 | switch (ios->power_mode) { |
1313 | case MMC_POWER_UP: | |
51da2240 YC |
1314 | if (!IS_ERR(mmc->supply.vmmc)) { |
1315 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, | |
1316 | ios->vdd); | |
1317 | if (ret) { | |
1318 | dev_err(slot->host->dev, | |
1319 | "failed to enable vmmc regulator\n"); | |
1320 | /*return, if failed turn on vmmc*/ | |
1321 | return; | |
1322 | } | |
1323 | } | |
29d0d161 DA |
1324 | set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); |
1325 | regs = mci_readl(slot->host, PWREN); | |
1326 | regs |= (1 << slot->id); | |
1327 | mci_writel(slot->host, PWREN, regs); | |
1328 | break; | |
1329 | case MMC_POWER_ON: | |
d1f1dd86 DA |
1330 | if (!slot->host->vqmmc_enabled) { |
1331 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
1332 | ret = regulator_enable(mmc->supply.vqmmc); | |
1333 | if (ret < 0) | |
1334 | dev_err(slot->host->dev, | |
1335 | "failed to enable vqmmc\n"); | |
1336 | else | |
1337 | slot->host->vqmmc_enabled = true; | |
1338 | ||
1339 | } else { | |
1340 | /* Keep track so we don't reset again */ | |
51da2240 | 1341 | slot->host->vqmmc_enabled = true; |
d1f1dd86 DA |
1342 | } |
1343 | ||
1344 | /* Reset our state machine after powering on */ | |
1345 | dw_mci_ctrl_reset(slot->host, | |
1346 | SDMMC_CTRL_ALL_RESET_FLAGS); | |
51da2240 | 1347 | } |
655babbd DA |
1348 | |
1349 | /* Adjust clock / bus width after power is up */ | |
1350 | dw_mci_setup_bus(slot, false); | |
1351 | ||
e6f34e2f JH |
1352 | break; |
1353 | case MMC_POWER_OFF: | |
655babbd DA |
1354 | /* Turn clock off before power goes down */ |
1355 | dw_mci_setup_bus(slot, false); | |
1356 | ||
51da2240 YC |
1357 | if (!IS_ERR(mmc->supply.vmmc)) |
1358 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
1359 | ||
d1f1dd86 | 1360 | if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) |
51da2240 | 1361 | regulator_disable(mmc->supply.vqmmc); |
d1f1dd86 | 1362 | slot->host->vqmmc_enabled = false; |
51da2240 | 1363 | |
4366dcc5 JC |
1364 | regs = mci_readl(slot->host, PWREN); |
1365 | regs &= ~(1 << slot->id); | |
1366 | mci_writel(slot->host, PWREN, regs); | |
f95f3850 WN |
1367 | break; |
1368 | default: | |
1369 | break; | |
1370 | } | |
655babbd DA |
1371 | |
1372 | if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) | |
1373 | slot->host->state = STATE_IDLE; | |
f95f3850 WN |
1374 | } |
1375 | ||
01730558 DA |
1376 | static int dw_mci_card_busy(struct mmc_host *mmc) |
1377 | { | |
1378 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1379 | u32 status; | |
1380 | ||
1381 | /* | |
1382 | * Check the busy bit which is low when DAT[3:0] | |
1383 | * (the data lines) are 0000 | |
1384 | */ | |
1385 | status = mci_readl(slot->host, STATUS); | |
1386 | ||
1387 | return !!(status & SDMMC_STATUS_BUSY); | |
1388 | } | |
1389 | ||
1390 | static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) | |
1391 | { | |
1392 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1393 | struct dw_mci *host = slot->host; | |
8f7849c4 | 1394 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
01730558 DA |
1395 | u32 uhs; |
1396 | u32 v18 = SDMMC_UHS_18V << slot->id; | |
01730558 DA |
1397 | int ret; |
1398 | ||
8f7849c4 ZG |
1399 | if (drv_data && drv_data->switch_voltage) |
1400 | return drv_data->switch_voltage(mmc, ios); | |
1401 | ||
01730558 DA |
1402 | /* |
1403 | * Program the voltage. Note that some instances of dw_mmc may use | |
1404 | * the UHS_REG for this. For other instances (like exynos) the UHS_REG | |
1405 | * does no harm but you need to set the regulator directly. Try both. | |
1406 | */ | |
1407 | uhs = mci_readl(host, UHS_REG); | |
e0848f5d | 1408 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) |
01730558 | 1409 | uhs &= ~v18; |
e0848f5d | 1410 | else |
01730558 | 1411 | uhs |= v18; |
e0848f5d | 1412 | |
01730558 | 1413 | if (!IS_ERR(mmc->supply.vqmmc)) { |
e0848f5d | 1414 | ret = mmc_regulator_set_vqmmc(mmc, ios); |
01730558 DA |
1415 | |
1416 | if (ret) { | |
b19caf37 | 1417 | dev_dbg(&mmc->class_dev, |
e0848f5d DA |
1418 | "Regulator set error %d - %s V\n", |
1419 | ret, uhs & v18 ? "1.8" : "3.3"); | |
01730558 DA |
1420 | return ret; |
1421 | } | |
1422 | } | |
1423 | mci_writel(host, UHS_REG, uhs); | |
1424 | ||
1425 | return 0; | |
1426 | } | |
1427 | ||
f95f3850 WN |
1428 | static int dw_mci_get_ro(struct mmc_host *mmc) |
1429 | { | |
1430 | int read_only; | |
1431 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
9795a846 | 1432 | int gpio_ro = mmc_gpio_get_ro(mmc); |
f95f3850 WN |
1433 | |
1434 | /* Use platform get_ro function, else try on board write protect */ | |
287980e4 | 1435 | if (gpio_ro >= 0) |
9795a846 | 1436 | read_only = gpio_ro; |
f95f3850 WN |
1437 | else |
1438 | read_only = | |
1439 | mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; | |
1440 | ||
1441 | dev_dbg(&mmc->class_dev, "card is %s\n", | |
1442 | read_only ? "read-only" : "read-write"); | |
1443 | ||
1444 | return read_only; | |
1445 | } | |
1446 | ||
1447 | static int dw_mci_get_cd(struct mmc_host *mmc) | |
1448 | { | |
1449 | int present; | |
1450 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
7cf347bd ZG |
1451 | struct dw_mci *host = slot->host; |
1452 | int gpio_cd = mmc_gpio_get_cd(mmc); | |
f95f3850 WN |
1453 | |
1454 | /* Use platform get_cd function, else try onboard card detect */ | |
860951c5 | 1455 | if ((mmc->caps & MMC_CAP_NEEDS_POLL) || !mmc_card_is_removable(mmc)) |
fc3d7720 | 1456 | present = 1; |
287980e4 | 1457 | else if (gpio_cd >= 0) |
7cf347bd | 1458 | present = gpio_cd; |
f95f3850 WN |
1459 | else |
1460 | present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) | |
1461 | == 0 ? 1 : 0; | |
1462 | ||
7cf347bd | 1463 | spin_lock_bh(&host->lock); |
bf626e55 ZG |
1464 | if (present) { |
1465 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1466 | dev_dbg(&mmc->class_dev, "card is present\n"); |
bf626e55 ZG |
1467 | } else { |
1468 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1469 | dev_dbg(&mmc->class_dev, "card is not present\n"); |
bf626e55 | 1470 | } |
7cf347bd | 1471 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
1472 | |
1473 | return present; | |
1474 | } | |
1475 | ||
935a665e SL |
1476 | static void dw_mci_hw_reset(struct mmc_host *mmc) |
1477 | { | |
1478 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1479 | struct dw_mci *host = slot->host; | |
1480 | int reset; | |
1481 | ||
1482 | if (host->use_dma == TRANS_MODE_IDMAC) | |
1483 | dw_mci_idmac_reset(host); | |
1484 | ||
1485 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET | | |
1486 | SDMMC_CTRL_FIFO_RESET)) | |
1487 | return; | |
1488 | ||
1489 | /* | |
1490 | * According to eMMC spec, card reset procedure: | |
1491 | * tRstW >= 1us: RST_n pulse width | |
1492 | * tRSCA >= 200us: RST_n to Command time | |
1493 | * tRSTH >= 1us: RST_n high period | |
1494 | */ | |
1495 | reset = mci_readl(host, RST_N); | |
1496 | reset &= ~(SDMMC_RST_HWACTIVE << slot->id); | |
1497 | mci_writel(host, RST_N, reset); | |
1498 | usleep_range(1, 2); | |
1499 | reset |= SDMMC_RST_HWACTIVE << slot->id; | |
1500 | mci_writel(host, RST_N, reset); | |
1501 | usleep_range(200, 300); | |
1502 | } | |
1503 | ||
b24c8b26 | 1504 | static void dw_mci_init_card(struct mmc_host *mmc, struct mmc_card *card) |
9623b5b9 | 1505 | { |
b24c8b26 | 1506 | struct dw_mci_slot *slot = mmc_priv(mmc); |
9623b5b9 | 1507 | struct dw_mci *host = slot->host; |
9623b5b9 | 1508 | |
b24c8b26 DA |
1509 | /* |
1510 | * Low power mode will stop the card clock when idle. According to the | |
1511 | * description of the CLKENA register we should disable low power mode | |
1512 | * for SDIO cards if we need SDIO interrupts to work. | |
1513 | */ | |
1514 | if (mmc->caps & MMC_CAP_SDIO_IRQ) { | |
1515 | const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; | |
1516 | u32 clk_en_a_old; | |
1517 | u32 clk_en_a; | |
9623b5b9 | 1518 | |
b24c8b26 DA |
1519 | clk_en_a_old = mci_readl(host, CLKENA); |
1520 | ||
1521 | if (card->type == MMC_TYPE_SDIO || | |
1522 | card->type == MMC_TYPE_SD_COMBO) { | |
1523 | set_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); | |
1524 | clk_en_a = clk_en_a_old & ~clken_low_pwr; | |
1525 | } else { | |
1526 | clear_bit(DW_MMC_CARD_NO_LOW_PWR, &slot->flags); | |
1527 | clk_en_a = clk_en_a_old | clken_low_pwr; | |
1528 | } | |
1529 | ||
1530 | if (clk_en_a != clk_en_a_old) { | |
1531 | mci_writel(host, CLKENA, clk_en_a); | |
1532 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
1533 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
1534 | } | |
9623b5b9 DA |
1535 | } |
1536 | } | |
1537 | ||
1a5c8e1f SH |
1538 | static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) |
1539 | { | |
1540 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1541 | struct dw_mci *host = slot->host; | |
f8c58c11 | 1542 | unsigned long irqflags; |
1a5c8e1f SH |
1543 | u32 int_mask; |
1544 | ||
f8c58c11 DA |
1545 | spin_lock_irqsave(&host->irq_lock, irqflags); |
1546 | ||
1a5c8e1f SH |
1547 | /* Enable/disable Slot Specific SDIO interrupt */ |
1548 | int_mask = mci_readl(host, INTMASK); | |
b24c8b26 DA |
1549 | if (enb) |
1550 | int_mask |= SDMMC_INT_SDIO(slot->sdio_id); | |
1551 | else | |
1552 | int_mask &= ~SDMMC_INT_SDIO(slot->sdio_id); | |
1553 | mci_writel(host, INTMASK, int_mask); | |
f8c58c11 DA |
1554 | |
1555 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
1a5c8e1f SH |
1556 | } |
1557 | ||
0976f16d SJ |
1558 | static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
1559 | { | |
1560 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1561 | struct dw_mci *host = slot->host; | |
1562 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
0e3a22c0 | 1563 | int err = -EINVAL; |
0976f16d | 1564 | |
0976f16d | 1565 | if (drv_data && drv_data->execute_tuning) |
9979dbe5 | 1566 | err = drv_data->execute_tuning(slot, opcode); |
0976f16d SJ |
1567 | return err; |
1568 | } | |
1569 | ||
0e3a22c0 SL |
1570 | static int dw_mci_prepare_hs400_tuning(struct mmc_host *mmc, |
1571 | struct mmc_ios *ios) | |
80113132 SJ |
1572 | { |
1573 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1574 | struct dw_mci *host = slot->host; | |
1575 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
1576 | ||
1577 | if (drv_data && drv_data->prepare_hs400_tuning) | |
1578 | return drv_data->prepare_hs400_tuning(host, ios); | |
1579 | ||
1580 | return 0; | |
1581 | } | |
1582 | ||
f95f3850 | 1583 | static const struct mmc_host_ops dw_mci_ops = { |
1a5c8e1f | 1584 | .request = dw_mci_request, |
9aa51408 SJ |
1585 | .pre_req = dw_mci_pre_req, |
1586 | .post_req = dw_mci_post_req, | |
1a5c8e1f SH |
1587 | .set_ios = dw_mci_set_ios, |
1588 | .get_ro = dw_mci_get_ro, | |
1589 | .get_cd = dw_mci_get_cd, | |
935a665e | 1590 | .hw_reset = dw_mci_hw_reset, |
1a5c8e1f | 1591 | .enable_sdio_irq = dw_mci_enable_sdio_irq, |
0976f16d | 1592 | .execute_tuning = dw_mci_execute_tuning, |
01730558 DA |
1593 | .card_busy = dw_mci_card_busy, |
1594 | .start_signal_voltage_switch = dw_mci_switch_voltage, | |
b24c8b26 | 1595 | .init_card = dw_mci_init_card, |
80113132 | 1596 | .prepare_hs400_tuning = dw_mci_prepare_hs400_tuning, |
f95f3850 WN |
1597 | }; |
1598 | ||
1599 | static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) | |
1600 | __releases(&host->lock) | |
1601 | __acquires(&host->lock) | |
1602 | { | |
1603 | struct dw_mci_slot *slot; | |
1604 | struct mmc_host *prev_mmc = host->cur_slot->mmc; | |
1605 | ||
1606 | WARN_ON(host->cmd || host->data); | |
1607 | ||
1608 | host->cur_slot->mrq = NULL; | |
1609 | host->mrq = NULL; | |
1610 | if (!list_empty(&host->queue)) { | |
1611 | slot = list_entry(host->queue.next, | |
1612 | struct dw_mci_slot, queue_node); | |
1613 | list_del(&slot->queue_node); | |
4a90920c | 1614 | dev_vdbg(host->dev, "list not empty: %s is next\n", |
f95f3850 WN |
1615 | mmc_hostname(slot->mmc)); |
1616 | host->state = STATE_SENDING_CMD; | |
1617 | dw_mci_start_request(host, slot); | |
1618 | } else { | |
4a90920c | 1619 | dev_vdbg(host->dev, "list empty\n"); |
01730558 DA |
1620 | |
1621 | if (host->state == STATE_SENDING_CMD11) | |
1622 | host->state = STATE_WAITING_CMD11_DONE; | |
1623 | else | |
1624 | host->state = STATE_IDLE; | |
f95f3850 WN |
1625 | } |
1626 | ||
1627 | spin_unlock(&host->lock); | |
1628 | mmc_request_done(prev_mmc, mrq); | |
1629 | spin_lock(&host->lock); | |
1630 | } | |
1631 | ||
e352c813 | 1632 | static int dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) |
f95f3850 WN |
1633 | { |
1634 | u32 status = host->cmd_status; | |
1635 | ||
1636 | host->cmd_status = 0; | |
1637 | ||
1638 | /* Read the response from the card (up to 16 bytes) */ | |
1639 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1640 | if (cmd->flags & MMC_RSP_136) { | |
1641 | cmd->resp[3] = mci_readl(host, RESP0); | |
1642 | cmd->resp[2] = mci_readl(host, RESP1); | |
1643 | cmd->resp[1] = mci_readl(host, RESP2); | |
1644 | cmd->resp[0] = mci_readl(host, RESP3); | |
1645 | } else { | |
1646 | cmd->resp[0] = mci_readl(host, RESP0); | |
1647 | cmd->resp[1] = 0; | |
1648 | cmd->resp[2] = 0; | |
1649 | cmd->resp[3] = 0; | |
1650 | } | |
1651 | } | |
1652 | ||
1653 | if (status & SDMMC_INT_RTO) | |
1654 | cmd->error = -ETIMEDOUT; | |
1655 | else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) | |
1656 | cmd->error = -EILSEQ; | |
1657 | else if (status & SDMMC_INT_RESP_ERR) | |
1658 | cmd->error = -EIO; | |
1659 | else | |
1660 | cmd->error = 0; | |
1661 | ||
e352c813 SJ |
1662 | return cmd->error; |
1663 | } | |
1664 | ||
1665 | static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) | |
1666 | { | |
31bff450 | 1667 | u32 status = host->data_status; |
e352c813 SJ |
1668 | |
1669 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1670 | if (status & SDMMC_INT_DRTO) { | |
1671 | data->error = -ETIMEDOUT; | |
1672 | } else if (status & SDMMC_INT_DCRC) { | |
1673 | data->error = -EILSEQ; | |
1674 | } else if (status & SDMMC_INT_EBE) { | |
1675 | if (host->dir_status == | |
1676 | DW_MCI_SEND_STATUS) { | |
1677 | /* | |
1678 | * No data CRC status was returned. | |
1679 | * The number of bytes transferred | |
1680 | * will be exaggerated in PIO mode. | |
1681 | */ | |
1682 | data->bytes_xfered = 0; | |
1683 | data->error = -ETIMEDOUT; | |
1684 | } else if (host->dir_status == | |
1685 | DW_MCI_RECV_STATUS) { | |
1686 | data->error = -EIO; | |
1687 | } | |
1688 | } else { | |
1689 | /* SDMMC_INT_SBE is included */ | |
1690 | data->error = -EIO; | |
1691 | } | |
1692 | ||
e6cc0123 | 1693 | dev_dbg(host->dev, "data error, status 0x%08x\n", status); |
e352c813 SJ |
1694 | |
1695 | /* | |
1696 | * After an error, there may be data lingering | |
31bff450 | 1697 | * in the FIFO |
e352c813 | 1698 | */ |
3a33a94c | 1699 | dw_mci_reset(host); |
e352c813 SJ |
1700 | } else { |
1701 | data->bytes_xfered = data->blocks * data->blksz; | |
1702 | data->error = 0; | |
1703 | } | |
1704 | ||
1705 | return data->error; | |
f95f3850 WN |
1706 | } |
1707 | ||
57e10486 AK |
1708 | static void dw_mci_set_drto(struct dw_mci *host) |
1709 | { | |
1710 | unsigned int drto_clks; | |
1711 | unsigned int drto_ms; | |
1712 | ||
1713 | drto_clks = mci_readl(host, TMOUT) >> 8; | |
1714 | drto_ms = DIV_ROUND_UP(drto_clks, host->bus_hz / 1000); | |
1715 | ||
1716 | /* add a bit spare time */ | |
1717 | drto_ms += 10; | |
1718 | ||
1719 | mod_timer(&host->dto_timer, jiffies + msecs_to_jiffies(drto_ms)); | |
1720 | } | |
1721 | ||
f95f3850 WN |
1722 | static void dw_mci_tasklet_func(unsigned long priv) |
1723 | { | |
1724 | struct dw_mci *host = (struct dw_mci *)priv; | |
1725 | struct mmc_data *data; | |
1726 | struct mmc_command *cmd; | |
e352c813 | 1727 | struct mmc_request *mrq; |
f95f3850 WN |
1728 | enum dw_mci_state state; |
1729 | enum dw_mci_state prev_state; | |
e352c813 | 1730 | unsigned int err; |
f95f3850 WN |
1731 | |
1732 | spin_lock(&host->lock); | |
1733 | ||
1734 | state = host->state; | |
1735 | data = host->data; | |
e352c813 | 1736 | mrq = host->mrq; |
f95f3850 WN |
1737 | |
1738 | do { | |
1739 | prev_state = state; | |
1740 | ||
1741 | switch (state) { | |
1742 | case STATE_IDLE: | |
01730558 | 1743 | case STATE_WAITING_CMD11_DONE: |
f95f3850 WN |
1744 | break; |
1745 | ||
01730558 | 1746 | case STATE_SENDING_CMD11: |
f95f3850 WN |
1747 | case STATE_SENDING_CMD: |
1748 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1749 | &host->pending_events)) | |
1750 | break; | |
1751 | ||
1752 | cmd = host->cmd; | |
1753 | host->cmd = NULL; | |
1754 | set_bit(EVENT_CMD_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1755 | err = dw_mci_command_complete(host, cmd); |
1756 | if (cmd == mrq->sbc && !err) { | |
053b3ce6 SJ |
1757 | prev_state = state = STATE_SENDING_CMD; |
1758 | __dw_mci_start_request(host, host->cur_slot, | |
e352c813 | 1759 | mrq->cmd); |
053b3ce6 SJ |
1760 | goto unlock; |
1761 | } | |
1762 | ||
e352c813 | 1763 | if (cmd->data && err) { |
71abb133 | 1764 | dw_mci_stop_dma(host); |
90c2143a SJ |
1765 | send_stop_abort(host, data); |
1766 | state = STATE_SENDING_STOP; | |
1767 | break; | |
71abb133 SJ |
1768 | } |
1769 | ||
e352c813 SJ |
1770 | if (!cmd->data || err) { |
1771 | dw_mci_request_end(host, mrq); | |
f95f3850 WN |
1772 | goto unlock; |
1773 | } | |
1774 | ||
1775 | prev_state = state = STATE_SENDING_DATA; | |
1776 | /* fall through */ | |
1777 | ||
1778 | case STATE_SENDING_DATA: | |
2aa35465 DA |
1779 | /* |
1780 | * We could get a data error and never a transfer | |
1781 | * complete so we'd better check for it here. | |
1782 | * | |
1783 | * Note that we don't really care if we also got a | |
1784 | * transfer complete; stopping the DMA and sending an | |
1785 | * abort won't hurt. | |
1786 | */ | |
f95f3850 WN |
1787 | if (test_and_clear_bit(EVENT_DATA_ERROR, |
1788 | &host->pending_events)) { | |
1789 | dw_mci_stop_dma(host); | |
bdb9a90b | 1790 | if (data->stop || |
1791 | !(host->data_status & (SDMMC_INT_DRTO | | |
1792 | SDMMC_INT_EBE))) | |
1793 | send_stop_abort(host, data); | |
f95f3850 WN |
1794 | state = STATE_DATA_ERROR; |
1795 | break; | |
1796 | } | |
1797 | ||
1798 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
57e10486 AK |
1799 | &host->pending_events)) { |
1800 | /* | |
1801 | * If all data-related interrupts don't come | |
1802 | * within the given time in reading data state. | |
1803 | */ | |
1804 | if ((host->quirks & DW_MCI_QUIRK_BROKEN_DTO) && | |
1805 | (host->dir_status == DW_MCI_RECV_STATUS)) | |
1806 | dw_mci_set_drto(host); | |
f95f3850 | 1807 | break; |
57e10486 | 1808 | } |
f95f3850 WN |
1809 | |
1810 | set_bit(EVENT_XFER_COMPLETE, &host->completed_events); | |
2aa35465 DA |
1811 | |
1812 | /* | |
1813 | * Handle an EVENT_DATA_ERROR that might have shown up | |
1814 | * before the transfer completed. This might not have | |
1815 | * been caught by the check above because the interrupt | |
1816 | * could have gone off between the previous check and | |
1817 | * the check for transfer complete. | |
1818 | * | |
1819 | * Technically this ought not be needed assuming we | |
1820 | * get a DATA_COMPLETE eventually (we'll notice the | |
1821 | * error and end the request), but it shouldn't hurt. | |
1822 | * | |
1823 | * This has the advantage of sending the stop command. | |
1824 | */ | |
1825 | if (test_and_clear_bit(EVENT_DATA_ERROR, | |
1826 | &host->pending_events)) { | |
1827 | dw_mci_stop_dma(host); | |
bdb9a90b | 1828 | if (data->stop || |
1829 | !(host->data_status & (SDMMC_INT_DRTO | | |
1830 | SDMMC_INT_EBE))) | |
1831 | send_stop_abort(host, data); | |
2aa35465 DA |
1832 | state = STATE_DATA_ERROR; |
1833 | break; | |
1834 | } | |
f95f3850 | 1835 | prev_state = state = STATE_DATA_BUSY; |
2aa35465 | 1836 | |
f95f3850 WN |
1837 | /* fall through */ |
1838 | ||
1839 | case STATE_DATA_BUSY: | |
1840 | if (!test_and_clear_bit(EVENT_DATA_COMPLETE, | |
57e10486 AK |
1841 | &host->pending_events)) { |
1842 | /* | |
1843 | * If data error interrupt comes but data over | |
1844 | * interrupt doesn't come within the given time. | |
1845 | * in reading data state. | |
1846 | */ | |
1847 | if ((host->quirks & DW_MCI_QUIRK_BROKEN_DTO) && | |
1848 | (host->dir_status == DW_MCI_RECV_STATUS)) | |
1849 | dw_mci_set_drto(host); | |
f95f3850 | 1850 | break; |
57e10486 | 1851 | } |
f95f3850 WN |
1852 | |
1853 | host->data = NULL; | |
1854 | set_bit(EVENT_DATA_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1855 | err = dw_mci_data_complete(host, data); |
1856 | ||
1857 | if (!err) { | |
1858 | if (!data->stop || mrq->sbc) { | |
17c8bc85 | 1859 | if (mrq->sbc && data->stop) |
e352c813 SJ |
1860 | data->stop->error = 0; |
1861 | dw_mci_request_end(host, mrq); | |
1862 | goto unlock; | |
f95f3850 | 1863 | } |
f95f3850 | 1864 | |
e352c813 SJ |
1865 | /* stop command for open-ended transfer*/ |
1866 | if (data->stop) | |
1867 | send_stop_abort(host, data); | |
2aa35465 DA |
1868 | } else { |
1869 | /* | |
1870 | * If we don't have a command complete now we'll | |
1871 | * never get one since we just reset everything; | |
1872 | * better end the request. | |
1873 | * | |
1874 | * If we do have a command complete we'll fall | |
1875 | * through to the SENDING_STOP command and | |
1876 | * everything will be peachy keen. | |
1877 | */ | |
1878 | if (!test_bit(EVENT_CMD_COMPLETE, | |
1879 | &host->pending_events)) { | |
1880 | host->cmd = NULL; | |
1881 | dw_mci_request_end(host, mrq); | |
1882 | goto unlock; | |
1883 | } | |
053b3ce6 SJ |
1884 | } |
1885 | ||
e352c813 SJ |
1886 | /* |
1887 | * If err has non-zero, | |
1888 | * stop-abort command has been already issued. | |
1889 | */ | |
f95f3850 | 1890 | prev_state = state = STATE_SENDING_STOP; |
e352c813 | 1891 | |
f95f3850 WN |
1892 | /* fall through */ |
1893 | ||
1894 | case STATE_SENDING_STOP: | |
1895 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1896 | &host->pending_events)) | |
1897 | break; | |
1898 | ||
71abb133 | 1899 | /* CMD error in data command */ |
31bff450 | 1900 | if (mrq->cmd->error && mrq->data) |
3a33a94c | 1901 | dw_mci_reset(host); |
71abb133 | 1902 | |
f95f3850 | 1903 | host->cmd = NULL; |
71abb133 | 1904 | host->data = NULL; |
90c2143a | 1905 | |
e352c813 SJ |
1906 | if (mrq->stop) |
1907 | dw_mci_command_complete(host, mrq->stop); | |
90c2143a SJ |
1908 | else |
1909 | host->cmd_status = 0; | |
1910 | ||
e352c813 | 1911 | dw_mci_request_end(host, mrq); |
f95f3850 WN |
1912 | goto unlock; |
1913 | ||
1914 | case STATE_DATA_ERROR: | |
1915 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1916 | &host->pending_events)) | |
1917 | break; | |
1918 | ||
1919 | state = STATE_DATA_BUSY; | |
1920 | break; | |
1921 | } | |
1922 | } while (state != prev_state); | |
1923 | ||
1924 | host->state = state; | |
1925 | unlock: | |
1926 | spin_unlock(&host->lock); | |
1927 | ||
1928 | } | |
1929 | ||
34b664a2 JH |
1930 | /* push final bytes to part_buf, only use during push */ |
1931 | static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1932 | { |
34b664a2 JH |
1933 | memcpy((void *)&host->part_buf, buf, cnt); |
1934 | host->part_buf_count = cnt; | |
1935 | } | |
f95f3850 | 1936 | |
34b664a2 JH |
1937 | /* append bytes to part_buf, only use during push */ |
1938 | static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1939 | { | |
1940 | cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); | |
1941 | memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); | |
1942 | host->part_buf_count += cnt; | |
1943 | return cnt; | |
1944 | } | |
f95f3850 | 1945 | |
34b664a2 JH |
1946 | /* pull first bytes from part_buf, only use during pull */ |
1947 | static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1948 | { | |
0e3a22c0 | 1949 | cnt = min_t(int, cnt, host->part_buf_count); |
34b664a2 JH |
1950 | if (cnt) { |
1951 | memcpy(buf, (void *)&host->part_buf + host->part_buf_start, | |
1952 | cnt); | |
1953 | host->part_buf_count -= cnt; | |
1954 | host->part_buf_start += cnt; | |
f95f3850 | 1955 | } |
34b664a2 | 1956 | return cnt; |
f95f3850 WN |
1957 | } |
1958 | ||
34b664a2 JH |
1959 | /* pull final bytes from the part_buf, assuming it's just been filled */ |
1960 | static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1961 | { |
34b664a2 JH |
1962 | memcpy(buf, &host->part_buf, cnt); |
1963 | host->part_buf_start = cnt; | |
1964 | host->part_buf_count = (1 << host->data_shift) - cnt; | |
1965 | } | |
f95f3850 | 1966 | |
34b664a2 JH |
1967 | static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) |
1968 | { | |
cfbeb59c MC |
1969 | struct mmc_data *data = host->data; |
1970 | int init_cnt = cnt; | |
1971 | ||
34b664a2 JH |
1972 | /* try and push anything in the part_buf */ |
1973 | if (unlikely(host->part_buf_count)) { | |
1974 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 1975 | |
34b664a2 JH |
1976 | buf += len; |
1977 | cnt -= len; | |
cfbeb59c | 1978 | if (host->part_buf_count == 2) { |
76184ac1 | 1979 | mci_fifo_writew(host->fifo_reg, host->part_buf16); |
34b664a2 JH |
1980 | host->part_buf_count = 0; |
1981 | } | |
1982 | } | |
1983 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1984 | if (unlikely((unsigned long)buf & 0x1)) { | |
1985 | while (cnt >= 2) { | |
1986 | u16 aligned_buf[64]; | |
1987 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1988 | int items = len >> 1; | |
1989 | int i; | |
1990 | /* memcpy from input buffer into aligned buffer */ | |
1991 | memcpy(aligned_buf, buf, len); | |
1992 | buf += len; | |
1993 | cnt -= len; | |
1994 | /* push data from aligned buffer into fifo */ | |
1995 | for (i = 0; i < items; ++i) | |
76184ac1 | 1996 | mci_fifo_writew(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
1997 | } |
1998 | } else | |
1999 | #endif | |
2000 | { | |
2001 | u16 *pdata = buf; | |
0e3a22c0 | 2002 | |
34b664a2 | 2003 | for (; cnt >= 2; cnt -= 2) |
76184ac1 | 2004 | mci_fifo_writew(host->fifo_reg, *pdata++); |
34b664a2 JH |
2005 | buf = pdata; |
2006 | } | |
2007 | /* put anything remaining in the part_buf */ | |
2008 | if (cnt) { | |
2009 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2010 | /* Push data if we have reached the expected data length */ |
2011 | if ((data->bytes_xfered + init_cnt) == | |
2012 | (data->blksz * data->blocks)) | |
76184ac1 | 2013 | mci_fifo_writew(host->fifo_reg, host->part_buf16); |
34b664a2 JH |
2014 | } |
2015 | } | |
f95f3850 | 2016 | |
34b664a2 JH |
2017 | static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) |
2018 | { | |
2019 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2020 | if (unlikely((unsigned long)buf & 0x1)) { | |
2021 | while (cnt >= 2) { | |
2022 | /* pull data from fifo into aligned buffer */ | |
2023 | u16 aligned_buf[64]; | |
2024 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
2025 | int items = len >> 1; | |
2026 | int i; | |
0e3a22c0 | 2027 | |
34b664a2 | 2028 | for (i = 0; i < items; ++i) |
76184ac1 | 2029 | aligned_buf[i] = mci_fifo_readw(host->fifo_reg); |
34b664a2 JH |
2030 | /* memcpy from aligned buffer into output buffer */ |
2031 | memcpy(buf, aligned_buf, len); | |
2032 | buf += len; | |
2033 | cnt -= len; | |
2034 | } | |
2035 | } else | |
2036 | #endif | |
2037 | { | |
2038 | u16 *pdata = buf; | |
0e3a22c0 | 2039 | |
34b664a2 | 2040 | for (; cnt >= 2; cnt -= 2) |
76184ac1 | 2041 | *pdata++ = mci_fifo_readw(host->fifo_reg); |
34b664a2 JH |
2042 | buf = pdata; |
2043 | } | |
2044 | if (cnt) { | |
76184ac1 | 2045 | host->part_buf16 = mci_fifo_readw(host->fifo_reg); |
34b664a2 | 2046 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
2047 | } |
2048 | } | |
2049 | ||
2050 | static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) | |
2051 | { | |
cfbeb59c MC |
2052 | struct mmc_data *data = host->data; |
2053 | int init_cnt = cnt; | |
2054 | ||
34b664a2 JH |
2055 | /* try and push anything in the part_buf */ |
2056 | if (unlikely(host->part_buf_count)) { | |
2057 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2058 | |
34b664a2 JH |
2059 | buf += len; |
2060 | cnt -= len; | |
cfbeb59c | 2061 | if (host->part_buf_count == 4) { |
76184ac1 | 2062 | mci_fifo_writel(host->fifo_reg, host->part_buf32); |
34b664a2 JH |
2063 | host->part_buf_count = 0; |
2064 | } | |
2065 | } | |
2066 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2067 | if (unlikely((unsigned long)buf & 0x3)) { | |
2068 | while (cnt >= 4) { | |
2069 | u32 aligned_buf[32]; | |
2070 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
2071 | int items = len >> 2; | |
2072 | int i; | |
2073 | /* memcpy from input buffer into aligned buffer */ | |
2074 | memcpy(aligned_buf, buf, len); | |
2075 | buf += len; | |
2076 | cnt -= len; | |
2077 | /* push data from aligned buffer into fifo */ | |
2078 | for (i = 0; i < items; ++i) | |
76184ac1 | 2079 | mci_fifo_writel(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2080 | } |
2081 | } else | |
2082 | #endif | |
2083 | { | |
2084 | u32 *pdata = buf; | |
0e3a22c0 | 2085 | |
34b664a2 | 2086 | for (; cnt >= 4; cnt -= 4) |
76184ac1 | 2087 | mci_fifo_writel(host->fifo_reg, *pdata++); |
34b664a2 JH |
2088 | buf = pdata; |
2089 | } | |
2090 | /* put anything remaining in the part_buf */ | |
2091 | if (cnt) { | |
2092 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2093 | /* Push data if we have reached the expected data length */ |
2094 | if ((data->bytes_xfered + init_cnt) == | |
2095 | (data->blksz * data->blocks)) | |
76184ac1 | 2096 | mci_fifo_writel(host->fifo_reg, host->part_buf32); |
f95f3850 WN |
2097 | } |
2098 | } | |
2099 | ||
2100 | static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) | |
2101 | { | |
34b664a2 JH |
2102 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
2103 | if (unlikely((unsigned long)buf & 0x3)) { | |
2104 | while (cnt >= 4) { | |
2105 | /* pull data from fifo into aligned buffer */ | |
2106 | u32 aligned_buf[32]; | |
2107 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
2108 | int items = len >> 2; | |
2109 | int i; | |
0e3a22c0 | 2110 | |
34b664a2 | 2111 | for (i = 0; i < items; ++i) |
76184ac1 | 2112 | aligned_buf[i] = mci_fifo_readl(host->fifo_reg); |
34b664a2 JH |
2113 | /* memcpy from aligned buffer into output buffer */ |
2114 | memcpy(buf, aligned_buf, len); | |
2115 | buf += len; | |
2116 | cnt -= len; | |
2117 | } | |
2118 | } else | |
2119 | #endif | |
2120 | { | |
2121 | u32 *pdata = buf; | |
0e3a22c0 | 2122 | |
34b664a2 | 2123 | for (; cnt >= 4; cnt -= 4) |
76184ac1 | 2124 | *pdata++ = mci_fifo_readl(host->fifo_reg); |
34b664a2 JH |
2125 | buf = pdata; |
2126 | } | |
2127 | if (cnt) { | |
76184ac1 | 2128 | host->part_buf32 = mci_fifo_readl(host->fifo_reg); |
34b664a2 | 2129 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
2130 | } |
2131 | } | |
2132 | ||
2133 | static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) | |
2134 | { | |
cfbeb59c MC |
2135 | struct mmc_data *data = host->data; |
2136 | int init_cnt = cnt; | |
2137 | ||
34b664a2 JH |
2138 | /* try and push anything in the part_buf */ |
2139 | if (unlikely(host->part_buf_count)) { | |
2140 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
0e3a22c0 | 2141 | |
34b664a2 JH |
2142 | buf += len; |
2143 | cnt -= len; | |
c09fbd74 | 2144 | |
cfbeb59c | 2145 | if (host->part_buf_count == 8) { |
76184ac1 | 2146 | mci_fifo_writeq(host->fifo_reg, host->part_buf); |
34b664a2 JH |
2147 | host->part_buf_count = 0; |
2148 | } | |
2149 | } | |
2150 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
2151 | if (unlikely((unsigned long)buf & 0x7)) { | |
2152 | while (cnt >= 8) { | |
2153 | u64 aligned_buf[16]; | |
2154 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
2155 | int items = len >> 3; | |
2156 | int i; | |
2157 | /* memcpy from input buffer into aligned buffer */ | |
2158 | memcpy(aligned_buf, buf, len); | |
2159 | buf += len; | |
2160 | cnt -= len; | |
2161 | /* push data from aligned buffer into fifo */ | |
2162 | for (i = 0; i < items; ++i) | |
76184ac1 | 2163 | mci_fifo_writeq(host->fifo_reg, aligned_buf[i]); |
34b664a2 JH |
2164 | } |
2165 | } else | |
2166 | #endif | |
2167 | { | |
2168 | u64 *pdata = buf; | |
0e3a22c0 | 2169 | |
34b664a2 | 2170 | for (; cnt >= 8; cnt -= 8) |
76184ac1 | 2171 | mci_fifo_writeq(host->fifo_reg, *pdata++); |
34b664a2 JH |
2172 | buf = pdata; |
2173 | } | |
2174 | /* put anything remaining in the part_buf */ | |
2175 | if (cnt) { | |
2176 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
2177 | /* Push data if we have reached the expected data length */ |
2178 | if ((data->bytes_xfered + init_cnt) == | |
2179 | (data->blksz * data->blocks)) | |
76184ac1 | 2180 | mci_fifo_writeq(host->fifo_reg, host->part_buf); |
f95f3850 WN |
2181 | } |
2182 | } | |
2183 | ||
2184 | static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) | |
2185 | { | |
34b664a2 JH |
2186 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
2187 | if (unlikely((unsigned long)buf & 0x7)) { | |
2188 | while (cnt >= 8) { | |
2189 | /* pull data from fifo into aligned buffer */ | |
2190 | u64 aligned_buf[16]; | |
2191 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
2192 | int items = len >> 3; | |
2193 | int i; | |
0e3a22c0 | 2194 | |
34b664a2 | 2195 | for (i = 0; i < items; ++i) |
76184ac1 BD |
2196 | aligned_buf[i] = mci_fifo_readq(host->fifo_reg); |
2197 | ||
34b664a2 JH |
2198 | /* memcpy from aligned buffer into output buffer */ |
2199 | memcpy(buf, aligned_buf, len); | |
2200 | buf += len; | |
2201 | cnt -= len; | |
2202 | } | |
2203 | } else | |
2204 | #endif | |
2205 | { | |
2206 | u64 *pdata = buf; | |
0e3a22c0 | 2207 | |
34b664a2 | 2208 | for (; cnt >= 8; cnt -= 8) |
76184ac1 | 2209 | *pdata++ = mci_fifo_readq(host->fifo_reg); |
34b664a2 JH |
2210 | buf = pdata; |
2211 | } | |
2212 | if (cnt) { | |
76184ac1 | 2213 | host->part_buf = mci_fifo_readq(host->fifo_reg); |
34b664a2 JH |
2214 | dw_mci_pull_final_bytes(host, buf, cnt); |
2215 | } | |
2216 | } | |
f95f3850 | 2217 | |
34b664a2 JH |
2218 | static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) |
2219 | { | |
2220 | int len; | |
f95f3850 | 2221 | |
34b664a2 JH |
2222 | /* get remaining partial bytes */ |
2223 | len = dw_mci_pull_part_bytes(host, buf, cnt); | |
2224 | if (unlikely(len == cnt)) | |
2225 | return; | |
2226 | buf += len; | |
2227 | cnt -= len; | |
2228 | ||
2229 | /* get the rest of the data */ | |
2230 | host->pull_data(host, buf, cnt); | |
f95f3850 WN |
2231 | } |
2232 | ||
87a74d39 | 2233 | static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) |
f95f3850 | 2234 | { |
f9c2a0dc SJ |
2235 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2236 | void *buf; | |
2237 | unsigned int offset; | |
f95f3850 WN |
2238 | struct mmc_data *data = host->data; |
2239 | int shift = host->data_shift; | |
2240 | u32 status; | |
3e4b0d8b | 2241 | unsigned int len; |
f9c2a0dc | 2242 | unsigned int remain, fcnt; |
f95f3850 WN |
2243 | |
2244 | do { | |
f9c2a0dc SJ |
2245 | if (!sg_miter_next(sg_miter)) |
2246 | goto done; | |
2247 | ||
4225fc85 | 2248 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2249 | buf = sg_miter->addr; |
2250 | remain = sg_miter->length; | |
2251 | offset = 0; | |
2252 | ||
2253 | do { | |
2254 | fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) | |
2255 | << shift) + host->part_buf_count; | |
2256 | len = min(remain, fcnt); | |
2257 | if (!len) | |
2258 | break; | |
34b664a2 | 2259 | dw_mci_pull_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2260 | data->bytes_xfered += len; |
f95f3850 | 2261 | offset += len; |
f9c2a0dc SJ |
2262 | remain -= len; |
2263 | } while (remain); | |
f95f3850 | 2264 | |
e74f3a9c | 2265 | sg_miter->consumed = offset; |
f95f3850 WN |
2266 | status = mci_readl(host, MINTSTS); |
2267 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
87a74d39 KK |
2268 | /* if the RXDR is ready read again */ |
2269 | } while ((status & SDMMC_INT_RXDR) || | |
2270 | (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); | |
f9c2a0dc SJ |
2271 | |
2272 | if (!remain) { | |
2273 | if (!sg_miter_next(sg_miter)) | |
2274 | goto done; | |
2275 | sg_miter->consumed = 0; | |
2276 | } | |
2277 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2278 | return; |
2279 | ||
2280 | done: | |
f9c2a0dc SJ |
2281 | sg_miter_stop(sg_miter); |
2282 | host->sg = NULL; | |
0e3a22c0 | 2283 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2284 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); |
2285 | } | |
2286 | ||
2287 | static void dw_mci_write_data_pio(struct dw_mci *host) | |
2288 | { | |
f9c2a0dc SJ |
2289 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2290 | void *buf; | |
2291 | unsigned int offset; | |
f95f3850 WN |
2292 | struct mmc_data *data = host->data; |
2293 | int shift = host->data_shift; | |
2294 | u32 status; | |
3e4b0d8b | 2295 | unsigned int len; |
f9c2a0dc SJ |
2296 | unsigned int fifo_depth = host->fifo_depth; |
2297 | unsigned int remain, fcnt; | |
f95f3850 WN |
2298 | |
2299 | do { | |
f9c2a0dc SJ |
2300 | if (!sg_miter_next(sg_miter)) |
2301 | goto done; | |
2302 | ||
4225fc85 | 2303 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2304 | buf = sg_miter->addr; |
2305 | remain = sg_miter->length; | |
2306 | offset = 0; | |
2307 | ||
2308 | do { | |
2309 | fcnt = ((fifo_depth - | |
2310 | SDMMC_GET_FCNT(mci_readl(host, STATUS))) | |
2311 | << shift) - host->part_buf_count; | |
2312 | len = min(remain, fcnt); | |
2313 | if (!len) | |
2314 | break; | |
f95f3850 | 2315 | host->push_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2316 | data->bytes_xfered += len; |
f95f3850 | 2317 | offset += len; |
f9c2a0dc SJ |
2318 | remain -= len; |
2319 | } while (remain); | |
f95f3850 | 2320 | |
e74f3a9c | 2321 | sg_miter->consumed = offset; |
f95f3850 WN |
2322 | status = mci_readl(host, MINTSTS); |
2323 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
f95f3850 | 2324 | } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ |
f9c2a0dc SJ |
2325 | |
2326 | if (!remain) { | |
2327 | if (!sg_miter_next(sg_miter)) | |
2328 | goto done; | |
2329 | sg_miter->consumed = 0; | |
2330 | } | |
2331 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2332 | return; |
2333 | ||
2334 | done: | |
f9c2a0dc SJ |
2335 | sg_miter_stop(sg_miter); |
2336 | host->sg = NULL; | |
0e3a22c0 | 2337 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2338 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); |
2339 | } | |
2340 | ||
2341 | static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) | |
2342 | { | |
2343 | if (!host->cmd_status) | |
2344 | host->cmd_status = status; | |
2345 | ||
0e3a22c0 | 2346 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2347 | |
2348 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
2349 | tasklet_schedule(&host->tasklet); | |
2350 | } | |
2351 | ||
6130e7a9 DA |
2352 | static void dw_mci_handle_cd(struct dw_mci *host) |
2353 | { | |
2354 | int i; | |
2355 | ||
2356 | for (i = 0; i < host->num_slots; i++) { | |
2357 | struct dw_mci_slot *slot = host->slot[i]; | |
2358 | ||
2359 | if (!slot) | |
2360 | continue; | |
2361 | ||
2362 | if (slot->mmc->ops->card_event) | |
2363 | slot->mmc->ops->card_event(slot->mmc); | |
2364 | mmc_detect_change(slot->mmc, | |
2365 | msecs_to_jiffies(host->pdata->detect_delay_ms)); | |
2366 | } | |
2367 | } | |
2368 | ||
f95f3850 WN |
2369 | static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) |
2370 | { | |
2371 | struct dw_mci *host = dev_id; | |
182c9081 | 2372 | u32 pending; |
1a5c8e1f | 2373 | int i; |
f95f3850 | 2374 | |
1fb5f68a MC |
2375 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ |
2376 | ||
476d79f1 | 2377 | if (pending) { |
01730558 DA |
2378 | /* Check volt switch first, since it can look like an error */ |
2379 | if ((host->state == STATE_SENDING_CMD11) && | |
2380 | (pending & SDMMC_INT_VOLT_SWITCH)) { | |
49ba0302 | 2381 | unsigned long irqflags; |
5c935165 | 2382 | |
01730558 DA |
2383 | mci_writel(host, RINTSTS, SDMMC_INT_VOLT_SWITCH); |
2384 | pending &= ~SDMMC_INT_VOLT_SWITCH; | |
49ba0302 DA |
2385 | |
2386 | /* | |
2387 | * Hold the lock; we know cmd11_timer can't be kicked | |
2388 | * off after the lock is released, so safe to delete. | |
2389 | */ | |
2390 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
01730558 | 2391 | dw_mci_cmd_interrupt(host, pending); |
49ba0302 DA |
2392 | spin_unlock_irqrestore(&host->irq_lock, irqflags); |
2393 | ||
2394 | del_timer(&host->cmd11_timer); | |
01730558 DA |
2395 | } |
2396 | ||
f95f3850 WN |
2397 | if (pending & DW_MCI_CMD_ERROR_FLAGS) { |
2398 | mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); | |
182c9081 | 2399 | host->cmd_status = pending; |
0e3a22c0 | 2400 | smp_wmb(); /* drain writebuffer */ |
f95f3850 | 2401 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); |
f95f3850 WN |
2402 | } |
2403 | ||
2404 | if (pending & DW_MCI_DATA_ERROR_FLAGS) { | |
2405 | /* if there is an error report DATA_ERROR */ | |
2406 | mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); | |
182c9081 | 2407 | host->data_status = pending; |
0e3a22c0 | 2408 | smp_wmb(); /* drain writebuffer */ |
f95f3850 | 2409 | set_bit(EVENT_DATA_ERROR, &host->pending_events); |
9b2026a1 | 2410 | tasklet_schedule(&host->tasklet); |
f95f3850 WN |
2411 | } |
2412 | ||
2413 | if (pending & SDMMC_INT_DATA_OVER) { | |
57e10486 AK |
2414 | if (host->quirks & DW_MCI_QUIRK_BROKEN_DTO) |
2415 | del_timer(&host->dto_timer); | |
2416 | ||
f95f3850 WN |
2417 | mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); |
2418 | if (!host->data_status) | |
182c9081 | 2419 | host->data_status = pending; |
0e3a22c0 | 2420 | smp_wmb(); /* drain writebuffer */ |
f95f3850 WN |
2421 | if (host->dir_status == DW_MCI_RECV_STATUS) { |
2422 | if (host->sg != NULL) | |
87a74d39 | 2423 | dw_mci_read_data_pio(host, true); |
f95f3850 WN |
2424 | } |
2425 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
2426 | tasklet_schedule(&host->tasklet); | |
2427 | } | |
2428 | ||
2429 | if (pending & SDMMC_INT_RXDR) { | |
2430 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
b40af3aa | 2431 | if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) |
87a74d39 | 2432 | dw_mci_read_data_pio(host, false); |
f95f3850 WN |
2433 | } |
2434 | ||
2435 | if (pending & SDMMC_INT_TXDR) { | |
2436 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
b40af3aa | 2437 | if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) |
f95f3850 WN |
2438 | dw_mci_write_data_pio(host); |
2439 | } | |
2440 | ||
2441 | if (pending & SDMMC_INT_CMD_DONE) { | |
2442 | mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); | |
182c9081 | 2443 | dw_mci_cmd_interrupt(host, pending); |
f95f3850 WN |
2444 | } |
2445 | ||
2446 | if (pending & SDMMC_INT_CD) { | |
2447 | mci_writel(host, RINTSTS, SDMMC_INT_CD); | |
6130e7a9 | 2448 | dw_mci_handle_cd(host); |
f95f3850 WN |
2449 | } |
2450 | ||
1a5c8e1f SH |
2451 | /* Handle SDIO Interrupts */ |
2452 | for (i = 0; i < host->num_slots; i++) { | |
2453 | struct dw_mci_slot *slot = host->slot[i]; | |
ed2540ef DA |
2454 | |
2455 | if (!slot) | |
2456 | continue; | |
2457 | ||
76756234 AK |
2458 | if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { |
2459 | mci_writel(host, RINTSTS, | |
2460 | SDMMC_INT_SDIO(slot->sdio_id)); | |
1a5c8e1f SH |
2461 | mmc_signal_sdio_irq(slot->mmc); |
2462 | } | |
2463 | } | |
2464 | ||
1fb5f68a | 2465 | } |
f95f3850 | 2466 | |
3fc7eaef SL |
2467 | if (host->use_dma != TRANS_MODE_IDMAC) |
2468 | return IRQ_HANDLED; | |
2469 | ||
2470 | /* Handle IDMA interrupts */ | |
69d99fdc PT |
2471 | if (host->dma_64bit_address == 1) { |
2472 | pending = mci_readl(host, IDSTS64); | |
2473 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2474 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_TI | | |
2475 | SDMMC_IDMAC_INT_RI); | |
2476 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_NI); | |
3fc7eaef | 2477 | host->dma_ops->complete((void *)host); |
69d99fdc PT |
2478 | } |
2479 | } else { | |
2480 | pending = mci_readl(host, IDSTS); | |
2481 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2482 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | | |
2483 | SDMMC_IDMAC_INT_RI); | |
2484 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); | |
3fc7eaef | 2485 | host->dma_ops->complete((void *)host); |
69d99fdc | 2486 | } |
f95f3850 | 2487 | } |
f95f3850 WN |
2488 | |
2489 | return IRQ_HANDLED; | |
2490 | } | |
2491 | ||
c91eab4b | 2492 | #ifdef CONFIG_OF |
eff8f2f5 LPC |
2493 | /* given a slot, find out the device node representing that slot */ |
2494 | static struct device_node *dw_mci_of_find_slot_node(struct dw_mci_slot *slot) | |
c91eab4b | 2495 | { |
eff8f2f5 | 2496 | struct device *dev = slot->mmc->parent; |
c91eab4b TA |
2497 | struct device_node *np; |
2498 | const __be32 *addr; | |
2499 | int len; | |
2500 | ||
2501 | if (!dev || !dev->of_node) | |
2502 | return NULL; | |
2503 | ||
2504 | for_each_child_of_node(dev->of_node, np) { | |
2505 | addr = of_get_property(np, "reg", &len); | |
2506 | if (!addr || (len < sizeof(int))) | |
2507 | continue; | |
eff8f2f5 | 2508 | if (be32_to_cpup(addr) == slot->id) |
c91eab4b TA |
2509 | return np; |
2510 | } | |
2511 | return NULL; | |
2512 | } | |
2513 | ||
eff8f2f5 | 2514 | static void dw_mci_slot_of_parse(struct dw_mci_slot *slot) |
a70aaa64 | 2515 | { |
eff8f2f5 | 2516 | struct device_node *np = dw_mci_of_find_slot_node(slot); |
a70aaa64 | 2517 | |
eff8f2f5 LPC |
2518 | if (!np) |
2519 | return; | |
a70aaa64 | 2520 | |
eff8f2f5 LPC |
2521 | if (of_property_read_bool(np, "disable-wp")) { |
2522 | slot->mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; | |
2523 | dev_warn(slot->mmc->parent, | |
2524 | "Slot quirk 'disable-wp' is deprecated\n"); | |
2525 | } | |
a70aaa64 | 2526 | } |
c91eab4b | 2527 | #else /* CONFIG_OF */ |
eff8f2f5 | 2528 | static void dw_mci_slot_of_parse(struct dw_mci_slot *slot) |
a70aaa64 | 2529 | { |
a70aaa64 | 2530 | } |
c91eab4b TA |
2531 | #endif /* CONFIG_OF */ |
2532 | ||
36c179a9 | 2533 | static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) |
f95f3850 WN |
2534 | { |
2535 | struct mmc_host *mmc; | |
2536 | struct dw_mci_slot *slot; | |
e95baf13 | 2537 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2538 | int ctrl_id, ret; |
1f44a2a5 | 2539 | u32 freq[2]; |
f95f3850 | 2540 | |
4a90920c | 2541 | mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); |
f95f3850 WN |
2542 | if (!mmc) |
2543 | return -ENOMEM; | |
2544 | ||
2545 | slot = mmc_priv(mmc); | |
2546 | slot->id = id; | |
76756234 | 2547 | slot->sdio_id = host->sdio_id0 + id; |
f95f3850 WN |
2548 | slot->mmc = mmc; |
2549 | slot->host = host; | |
c91eab4b | 2550 | host->slot[id] = slot; |
f95f3850 WN |
2551 | |
2552 | mmc->ops = &dw_mci_ops; | |
1f44a2a5 SJ |
2553 | if (of_property_read_u32_array(host->dev->of_node, |
2554 | "clock-freq-min-max", freq, 2)) { | |
2555 | mmc->f_min = DW_MCI_FREQ_MIN; | |
2556 | mmc->f_max = DW_MCI_FREQ_MAX; | |
2557 | } else { | |
2558 | mmc->f_min = freq[0]; | |
2559 | mmc->f_max = freq[1]; | |
2560 | } | |
f95f3850 | 2561 | |
51da2240 YC |
2562 | /*if there are external regulators, get them*/ |
2563 | ret = mmc_regulator_get_supply(mmc); | |
2564 | if (ret == -EPROBE_DEFER) | |
3cf890fc | 2565 | goto err_host_allocated; |
51da2240 YC |
2566 | |
2567 | if (!mmc->ocr_avail) | |
2568 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
f95f3850 | 2569 | |
fc3d7720 JC |
2570 | if (host->pdata->caps) |
2571 | mmc->caps = host->pdata->caps; | |
fc3d7720 | 2572 | |
ab269128 AK |
2573 | if (host->pdata->pm_caps) |
2574 | mmc->pm_caps = host->pdata->pm_caps; | |
2575 | ||
800d78bf TA |
2576 | if (host->dev->of_node) { |
2577 | ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); | |
2578 | if (ctrl_id < 0) | |
2579 | ctrl_id = 0; | |
2580 | } else { | |
2581 | ctrl_id = to_platform_device(host->dev)->id; | |
2582 | } | |
cb27a843 JH |
2583 | if (drv_data && drv_data->caps) |
2584 | mmc->caps |= drv_data->caps[ctrl_id]; | |
800d78bf | 2585 | |
4f408cc6 SJ |
2586 | if (host->pdata->caps2) |
2587 | mmc->caps2 = host->pdata->caps2; | |
4f408cc6 | 2588 | |
eff8f2f5 LPC |
2589 | dw_mci_slot_of_parse(slot); |
2590 | ||
3cf890fc DA |
2591 | ret = mmc_of_parse(mmc); |
2592 | if (ret) | |
2593 | goto err_host_allocated; | |
f95f3850 | 2594 | |
2b708df2 | 2595 | /* Useful defaults if platform data is unset. */ |
3fc7eaef | 2596 | if (host->use_dma == TRANS_MODE_IDMAC) { |
2b708df2 | 2597 | mmc->max_segs = host->ring_size; |
225faf87 | 2598 | mmc->max_blk_size = 65535; |
2b708df2 JC |
2599 | mmc->max_seg_size = 0x1000; |
2600 | mmc->max_req_size = mmc->max_seg_size * host->ring_size; | |
2601 | mmc->max_blk_count = mmc->max_req_size / 512; | |
3fc7eaef SL |
2602 | } else if (host->use_dma == TRANS_MODE_EDMAC) { |
2603 | mmc->max_segs = 64; | |
225faf87 | 2604 | mmc->max_blk_size = 65535; |
3fc7eaef SL |
2605 | mmc->max_blk_count = 65535; |
2606 | mmc->max_req_size = | |
2607 | mmc->max_blk_size * mmc->max_blk_count; | |
2608 | mmc->max_seg_size = mmc->max_req_size; | |
f95f3850 | 2609 | } else { |
3fc7eaef | 2610 | /* TRANS_MODE_PIO */ |
2b708df2 | 2611 | mmc->max_segs = 64; |
225faf87 | 2612 | mmc->max_blk_size = 65535; /* BLKSIZ is 16 bits */ |
2b708df2 JC |
2613 | mmc->max_blk_count = 512; |
2614 | mmc->max_req_size = mmc->max_blk_size * | |
2615 | mmc->max_blk_count; | |
2616 | mmc->max_seg_size = mmc->max_req_size; | |
a39e5746 | 2617 | } |
f95f3850 | 2618 | |
c0834a58 | 2619 | dw_mci_get_cd(mmc); |
ae0eb348 | 2620 | |
0cea529d JC |
2621 | ret = mmc_add_host(mmc); |
2622 | if (ret) | |
3cf890fc | 2623 | goto err_host_allocated; |
f95f3850 WN |
2624 | |
2625 | #if defined(CONFIG_DEBUG_FS) | |
2626 | dw_mci_init_debugfs(slot); | |
2627 | #endif | |
2628 | ||
f95f3850 | 2629 | return 0; |
800d78bf | 2630 | |
3cf890fc | 2631 | err_host_allocated: |
800d78bf | 2632 | mmc_free_host(mmc); |
51da2240 | 2633 | return ret; |
f95f3850 WN |
2634 | } |
2635 | ||
2636 | static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) | |
2637 | { | |
f95f3850 WN |
2638 | /* Debugfs stuff is cleaned up by mmc core */ |
2639 | mmc_remove_host(slot->mmc); | |
2640 | slot->host->slot[id] = NULL; | |
2641 | mmc_free_host(slot->mmc); | |
2642 | } | |
2643 | ||
2644 | static void dw_mci_init_dma(struct dw_mci *host) | |
2645 | { | |
69d99fdc | 2646 | int addr_config; |
3fc7eaef SL |
2647 | struct device *dev = host->dev; |
2648 | struct device_node *np = dev->of_node; | |
69d99fdc | 2649 | |
3fc7eaef SL |
2650 | /* |
2651 | * Check tansfer mode from HCON[17:16] | |
2652 | * Clear the ambiguous description of dw_mmc databook: | |
2653 | * 2b'00: No DMA Interface -> Actually means using Internal DMA block | |
2654 | * 2b'01: DesignWare DMA Interface -> Synopsys DW-DMA block | |
2655 | * 2b'10: Generic DMA Interface -> non-Synopsys generic DMA block | |
2656 | * 2b'11: Non DW DMA Interface -> pio only | |
2657 | * Compared to DesignWare DMA Interface, Generic DMA Interface has a | |
2658 | * simpler request/acknowledge handshake mechanism and both of them | |
2659 | * are regarded as external dma master for dw_mmc. | |
2660 | */ | |
2661 | host->use_dma = SDMMC_GET_TRANS_MODE(mci_readl(host, HCON)); | |
2662 | if (host->use_dma == DMA_INTERFACE_IDMA) { | |
2663 | host->use_dma = TRANS_MODE_IDMAC; | |
2664 | } else if (host->use_dma == DMA_INTERFACE_DWDMA || | |
2665 | host->use_dma == DMA_INTERFACE_GDMA) { | |
2666 | host->use_dma = TRANS_MODE_EDMAC; | |
2667 | } else { | |
f95f3850 WN |
2668 | goto no_dma; |
2669 | } | |
2670 | ||
2671 | /* Determine which DMA interface to use */ | |
3fc7eaef SL |
2672 | if (host->use_dma == TRANS_MODE_IDMAC) { |
2673 | /* | |
2674 | * Check ADDR_CONFIG bit in HCON to find | |
2675 | * IDMAC address bus width | |
2676 | */ | |
70692752 | 2677 | addr_config = SDMMC_GET_ADDR_CONFIG(mci_readl(host, HCON)); |
3fc7eaef SL |
2678 | |
2679 | if (addr_config == 1) { | |
2680 | /* host supports IDMAC in 64-bit address mode */ | |
2681 | host->dma_64bit_address = 1; | |
2682 | dev_info(host->dev, | |
2683 | "IDMAC supports 64-bit address mode.\n"); | |
2684 | if (!dma_set_mask(host->dev, DMA_BIT_MASK(64))) | |
2685 | dma_set_coherent_mask(host->dev, | |
2686 | DMA_BIT_MASK(64)); | |
2687 | } else { | |
2688 | /* host supports IDMAC in 32-bit address mode */ | |
2689 | host->dma_64bit_address = 0; | |
2690 | dev_info(host->dev, | |
2691 | "IDMAC supports 32-bit address mode.\n"); | |
2692 | } | |
f95f3850 | 2693 | |
3fc7eaef SL |
2694 | /* Alloc memory for sg translation */ |
2695 | host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE, | |
2696 | &host->sg_dma, GFP_KERNEL); | |
2697 | if (!host->sg_cpu) { | |
2698 | dev_err(host->dev, | |
2699 | "%s: could not alloc DMA memory\n", | |
2700 | __func__); | |
2701 | goto no_dma; | |
2702 | } | |
2703 | ||
2704 | host->dma_ops = &dw_mci_idmac_ops; | |
2705 | dev_info(host->dev, "Using internal DMA controller.\n"); | |
2706 | } else { | |
2707 | /* TRANS_MODE_EDMAC: check dma bindings again */ | |
2708 | if ((of_property_count_strings(np, "dma-names") < 0) || | |
2709 | (!of_find_property(np, "dmas", NULL))) { | |
2710 | goto no_dma; | |
2711 | } | |
2712 | host->dma_ops = &dw_mci_edmac_ops; | |
2713 | dev_info(host->dev, "Using external DMA controller.\n"); | |
2714 | } | |
f95f3850 | 2715 | |
e1631f98 JC |
2716 | if (host->dma_ops->init && host->dma_ops->start && |
2717 | host->dma_ops->stop && host->dma_ops->cleanup) { | |
f95f3850 | 2718 | if (host->dma_ops->init(host)) { |
0e3a22c0 SL |
2719 | dev_err(host->dev, "%s: Unable to initialize DMA Controller.\n", |
2720 | __func__); | |
f95f3850 WN |
2721 | goto no_dma; |
2722 | } | |
2723 | } else { | |
4a90920c | 2724 | dev_err(host->dev, "DMA initialization not found.\n"); |
f95f3850 WN |
2725 | goto no_dma; |
2726 | } | |
2727 | ||
f95f3850 WN |
2728 | return; |
2729 | ||
2730 | no_dma: | |
4a90920c | 2731 | dev_info(host->dev, "Using PIO mode.\n"); |
3fc7eaef | 2732 | host->use_dma = TRANS_MODE_PIO; |
f95f3850 WN |
2733 | } |
2734 | ||
31bff450 | 2735 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) |
f95f3850 WN |
2736 | { |
2737 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
31bff450 | 2738 | u32 ctrl; |
f95f3850 | 2739 | |
31bff450 SJ |
2740 | ctrl = mci_readl(host, CTRL); |
2741 | ctrl |= reset; | |
2742 | mci_writel(host, CTRL, ctrl); | |
f95f3850 WN |
2743 | |
2744 | /* wait till resets clear */ | |
2745 | do { | |
2746 | ctrl = mci_readl(host, CTRL); | |
31bff450 | 2747 | if (!(ctrl & reset)) |
f95f3850 WN |
2748 | return true; |
2749 | } while (time_before(jiffies, timeout)); | |
2750 | ||
31bff450 SJ |
2751 | dev_err(host->dev, |
2752 | "Timeout resetting block (ctrl reset %#x)\n", | |
2753 | ctrl & reset); | |
f95f3850 WN |
2754 | |
2755 | return false; | |
2756 | } | |
2757 | ||
3a33a94c | 2758 | static bool dw_mci_reset(struct dw_mci *host) |
31bff450 | 2759 | { |
3a33a94c SR |
2760 | u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; |
2761 | bool ret = false; | |
2762 | ||
31bff450 SJ |
2763 | /* |
2764 | * Reseting generates a block interrupt, hence setting | |
2765 | * the scatter-gather pointer to NULL. | |
2766 | */ | |
2767 | if (host->sg) { | |
2768 | sg_miter_stop(&host->sg_miter); | |
2769 | host->sg = NULL; | |
2770 | } | |
2771 | ||
3a33a94c SR |
2772 | if (host->use_dma) |
2773 | flags |= SDMMC_CTRL_DMA_RESET; | |
31bff450 | 2774 | |
3a33a94c SR |
2775 | if (dw_mci_ctrl_reset(host, flags)) { |
2776 | /* | |
2777 | * In all cases we clear the RAWINTS register to clear any | |
2778 | * interrupts. | |
2779 | */ | |
2780 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2781 | ||
2782 | /* if using dma we wait for dma_req to clear */ | |
2783 | if (host->use_dma) { | |
2784 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
2785 | u32 status; | |
0e3a22c0 | 2786 | |
3a33a94c SR |
2787 | do { |
2788 | status = mci_readl(host, STATUS); | |
2789 | if (!(status & SDMMC_STATUS_DMA_REQ)) | |
2790 | break; | |
2791 | cpu_relax(); | |
2792 | } while (time_before(jiffies, timeout)); | |
2793 | ||
2794 | if (status & SDMMC_STATUS_DMA_REQ) { | |
2795 | dev_err(host->dev, | |
0e3a22c0 SL |
2796 | "%s: Timeout waiting for dma_req to clear during reset\n", |
2797 | __func__); | |
3a33a94c SR |
2798 | goto ciu_out; |
2799 | } | |
2800 | ||
2801 | /* when using DMA next we reset the fifo again */ | |
2802 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) | |
2803 | goto ciu_out; | |
2804 | } | |
2805 | } else { | |
2806 | /* if the controller reset bit did clear, then set clock regs */ | |
2807 | if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { | |
0e3a22c0 SL |
2808 | dev_err(host->dev, |
2809 | "%s: fifo/dma reset bits didn't clear but ciu was reset, doing clock update\n", | |
3a33a94c SR |
2810 | __func__); |
2811 | goto ciu_out; | |
2812 | } | |
2813 | } | |
2814 | ||
3fc7eaef SL |
2815 | if (host->use_dma == TRANS_MODE_IDMAC) |
2816 | /* It is also recommended that we reset and reprogram idmac */ | |
2817 | dw_mci_idmac_reset(host); | |
3a33a94c SR |
2818 | |
2819 | ret = true; | |
2820 | ||
2821 | ciu_out: | |
2822 | /* After a CTRL reset we need to have CIU set clock registers */ | |
2823 | mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0); | |
2824 | ||
2825 | return ret; | |
31bff450 SJ |
2826 | } |
2827 | ||
5c935165 DA |
2828 | static void dw_mci_cmd11_timer(unsigned long arg) |
2829 | { | |
2830 | struct dw_mci *host = (struct dw_mci *)arg; | |
2831 | ||
fd674198 DA |
2832 | if (host->state != STATE_SENDING_CMD11) { |
2833 | dev_warn(host->dev, "Unexpected CMD11 timeout\n"); | |
2834 | return; | |
2835 | } | |
5c935165 DA |
2836 | |
2837 | host->cmd_status = SDMMC_INT_RTO; | |
2838 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
2839 | tasklet_schedule(&host->tasklet); | |
2840 | } | |
2841 | ||
57e10486 AK |
2842 | static void dw_mci_dto_timer(unsigned long arg) |
2843 | { | |
2844 | struct dw_mci *host = (struct dw_mci *)arg; | |
2845 | ||
2846 | switch (host->state) { | |
2847 | case STATE_SENDING_DATA: | |
2848 | case STATE_DATA_BUSY: | |
2849 | /* | |
2850 | * If DTO interrupt does NOT come in sending data state, | |
2851 | * we should notify the driver to terminate current transfer | |
2852 | * and report a data timeout to the core. | |
2853 | */ | |
2854 | host->data_status = SDMMC_INT_DRTO; | |
2855 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
2856 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
2857 | tasklet_schedule(&host->tasklet); | |
2858 | break; | |
2859 | default: | |
2860 | break; | |
2861 | } | |
2862 | } | |
2863 | ||
c91eab4b | 2864 | #ifdef CONFIG_OF |
c91eab4b TA |
2865 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) |
2866 | { | |
2867 | struct dw_mci_board *pdata; | |
2868 | struct device *dev = host->dev; | |
2869 | struct device_node *np = dev->of_node; | |
e95baf13 | 2870 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
e8cc37b8 | 2871 | int ret; |
3c6d89ea | 2872 | u32 clock_frequency; |
c91eab4b TA |
2873 | |
2874 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
bf3707ea | 2875 | if (!pdata) |
c91eab4b | 2876 | return ERR_PTR(-ENOMEM); |
c91eab4b TA |
2877 | |
2878 | /* find out number of slots supported */ | |
8a629d26 | 2879 | of_property_read_u32(np, "num-slots", &pdata->num_slots); |
c91eab4b | 2880 | |
c91eab4b | 2881 | if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth)) |
0e3a22c0 SL |
2882 | dev_info(dev, |
2883 | "fifo-depth property not found, using value of FIFOTH register as default\n"); | |
c91eab4b TA |
2884 | |
2885 | of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); | |
2886 | ||
3c6d89ea DA |
2887 | if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) |
2888 | pdata->bus_hz = clock_frequency; | |
2889 | ||
cb27a843 JH |
2890 | if (drv_data && drv_data->parse_dt) { |
2891 | ret = drv_data->parse_dt(host); | |
800d78bf TA |
2892 | if (ret) |
2893 | return ERR_PTR(ret); | |
2894 | } | |
2895 | ||
40a7a463 JC |
2896 | if (of_find_property(np, "supports-highspeed", NULL)) { |
2897 | dev_info(dev, "supports-highspeed property is deprecated.\n"); | |
10b49841 | 2898 | pdata->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; |
40a7a463 | 2899 | } |
10b49841 | 2900 | |
c91eab4b TA |
2901 | return pdata; |
2902 | } | |
2903 | ||
2904 | #else /* CONFIG_OF */ | |
2905 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
2906 | { | |
2907 | return ERR_PTR(-EINVAL); | |
2908 | } | |
2909 | #endif /* CONFIG_OF */ | |
2910 | ||
fa0c3283 DA |
2911 | static void dw_mci_enable_cd(struct dw_mci *host) |
2912 | { | |
fa0c3283 DA |
2913 | unsigned long irqflags; |
2914 | u32 temp; | |
2915 | int i; | |
e8cc37b8 | 2916 | struct dw_mci_slot *slot; |
fa0c3283 | 2917 | |
e8cc37b8 SL |
2918 | /* |
2919 | * No need for CD if all slots have a non-error GPIO | |
2920 | * as well as broken card detection is found. | |
2921 | */ | |
fa0c3283 | 2922 | for (i = 0; i < host->num_slots; i++) { |
e8cc37b8 SL |
2923 | slot = host->slot[i]; |
2924 | if (slot->mmc->caps & MMC_CAP_NEEDS_POLL) | |
2925 | return; | |
fa0c3283 | 2926 | |
287980e4 | 2927 | if (mmc_gpio_get_cd(slot->mmc) < 0) |
fa0c3283 DA |
2928 | break; |
2929 | } | |
2930 | if (i == host->num_slots) | |
2931 | return; | |
2932 | ||
2933 | spin_lock_irqsave(&host->irq_lock, irqflags); | |
2934 | temp = mci_readl(host, INTMASK); | |
2935 | temp |= SDMMC_INT_CD; | |
2936 | mci_writel(host, INTMASK, temp); | |
2937 | spin_unlock_irqrestore(&host->irq_lock, irqflags); | |
2938 | } | |
2939 | ||
62ca8034 | 2940 | int dw_mci_probe(struct dw_mci *host) |
f95f3850 | 2941 | { |
e95baf13 | 2942 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
62ca8034 | 2943 | int width, i, ret = 0; |
f95f3850 | 2944 | u32 fifo_size; |
1c2215b7 | 2945 | int init_slots = 0; |
f95f3850 | 2946 | |
c91eab4b TA |
2947 | if (!host->pdata) { |
2948 | host->pdata = dw_mci_parse_dt(host); | |
2949 | if (IS_ERR(host->pdata)) { | |
2950 | dev_err(host->dev, "platform data not available\n"); | |
2951 | return -EINVAL; | |
2952 | } | |
f95f3850 WN |
2953 | } |
2954 | ||
780f22af | 2955 | host->biu_clk = devm_clk_get(host->dev, "biu"); |
f90a0612 TA |
2956 | if (IS_ERR(host->biu_clk)) { |
2957 | dev_dbg(host->dev, "biu clock not available\n"); | |
2958 | } else { | |
2959 | ret = clk_prepare_enable(host->biu_clk); | |
2960 | if (ret) { | |
2961 | dev_err(host->dev, "failed to enable biu clock\n"); | |
f90a0612 TA |
2962 | return ret; |
2963 | } | |
2964 | } | |
2965 | ||
780f22af | 2966 | host->ciu_clk = devm_clk_get(host->dev, "ciu"); |
f90a0612 TA |
2967 | if (IS_ERR(host->ciu_clk)) { |
2968 | dev_dbg(host->dev, "ciu clock not available\n"); | |
3c6d89ea | 2969 | host->bus_hz = host->pdata->bus_hz; |
f90a0612 TA |
2970 | } else { |
2971 | ret = clk_prepare_enable(host->ciu_clk); | |
2972 | if (ret) { | |
2973 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
f90a0612 TA |
2974 | goto err_clk_biu; |
2975 | } | |
f90a0612 | 2976 | |
3c6d89ea DA |
2977 | if (host->pdata->bus_hz) { |
2978 | ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); | |
2979 | if (ret) | |
2980 | dev_warn(host->dev, | |
612de4c1 | 2981 | "Unable to set bus rate to %uHz\n", |
3c6d89ea DA |
2982 | host->pdata->bus_hz); |
2983 | } | |
f90a0612 | 2984 | host->bus_hz = clk_get_rate(host->ciu_clk); |
3c6d89ea | 2985 | } |
f90a0612 | 2986 | |
612de4c1 JC |
2987 | if (!host->bus_hz) { |
2988 | dev_err(host->dev, | |
2989 | "Platform data must supply bus speed\n"); | |
2990 | ret = -ENODEV; | |
2991 | goto err_clk_ciu; | |
2992 | } | |
2993 | ||
002f0d5c YK |
2994 | if (drv_data && drv_data->init) { |
2995 | ret = drv_data->init(host); | |
2996 | if (ret) { | |
2997 | dev_err(host->dev, | |
2998 | "implementation specific init failed\n"); | |
2999 | goto err_clk_ciu; | |
3000 | } | |
3001 | } | |
3002 | ||
5c935165 DA |
3003 | setup_timer(&host->cmd11_timer, |
3004 | dw_mci_cmd11_timer, (unsigned long)host); | |
3005 | ||
62ca8034 | 3006 | host->quirks = host->pdata->quirks; |
f95f3850 | 3007 | |
57e10486 AK |
3008 | if (host->quirks & DW_MCI_QUIRK_BROKEN_DTO) |
3009 | setup_timer(&host->dto_timer, | |
3010 | dw_mci_dto_timer, (unsigned long)host); | |
3011 | ||
f95f3850 | 3012 | spin_lock_init(&host->lock); |
f8c58c11 | 3013 | spin_lock_init(&host->irq_lock); |
f95f3850 WN |
3014 | INIT_LIST_HEAD(&host->queue); |
3015 | ||
f95f3850 WN |
3016 | /* |
3017 | * Get the host data width - this assumes that HCON has been set with | |
3018 | * the correct values. | |
3019 | */ | |
70692752 | 3020 | i = SDMMC_GET_HDATA_WIDTH(mci_readl(host, HCON)); |
f95f3850 WN |
3021 | if (!i) { |
3022 | host->push_data = dw_mci_push_data16; | |
3023 | host->pull_data = dw_mci_pull_data16; | |
3024 | width = 16; | |
3025 | host->data_shift = 1; | |
3026 | } else if (i == 2) { | |
3027 | host->push_data = dw_mci_push_data64; | |
3028 | host->pull_data = dw_mci_pull_data64; | |
3029 | width = 64; | |
3030 | host->data_shift = 3; | |
3031 | } else { | |
3032 | /* Check for a reserved value, and warn if it is */ | |
3033 | WARN((i != 1), | |
3034 | "HCON reports a reserved host data width!\n" | |
3035 | "Defaulting to 32-bit access.\n"); | |
3036 | host->push_data = dw_mci_push_data32; | |
3037 | host->pull_data = dw_mci_pull_data32; | |
3038 | width = 32; | |
3039 | host->data_shift = 2; | |
3040 | } | |
3041 | ||
3042 | /* Reset all blocks */ | |
3744415c SL |
3043 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { |
3044 | ret = -ENODEV; | |
3045 | goto err_clk_ciu; | |
3046 | } | |
141a712a SJ |
3047 | |
3048 | host->dma_ops = host->pdata->dma_ops; | |
3049 | dw_mci_init_dma(host); | |
f95f3850 WN |
3050 | |
3051 | /* Clear the interrupts for the host controller */ | |
3052 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
3053 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
3054 | ||
3055 | /* Put in max timeout */ | |
3056 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
3057 | ||
3058 | /* | |
3059 | * FIFO threshold settings RxMark = fifo_size / 2 - 1, | |
3060 | * Tx Mark = fifo_size / 2 DMA Size = 8 | |
3061 | */ | |
b86d8253 JH |
3062 | if (!host->pdata->fifo_depth) { |
3063 | /* | |
3064 | * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may | |
3065 | * have been overwritten by the bootloader, just like we're | |
3066 | * about to do, so if you know the value for your hardware, you | |
3067 | * should put it in the platform data. | |
3068 | */ | |
3069 | fifo_size = mci_readl(host, FIFOTH); | |
8234e869 | 3070 | fifo_size = 1 + ((fifo_size >> 16) & 0xfff); |
b86d8253 JH |
3071 | } else { |
3072 | fifo_size = host->pdata->fifo_depth; | |
3073 | } | |
3074 | host->fifo_depth = fifo_size; | |
52426899 SJ |
3075 | host->fifoth_val = |
3076 | SDMMC_SET_FIFOTH(0x2, fifo_size / 2 - 1, fifo_size / 2); | |
e61cf118 | 3077 | mci_writel(host, FIFOTH, host->fifoth_val); |
f95f3850 WN |
3078 | |
3079 | /* disable clock to CIU */ | |
3080 | mci_writel(host, CLKENA, 0); | |
3081 | mci_writel(host, CLKSRC, 0); | |
3082 | ||
63008768 JH |
3083 | /* |
3084 | * In 2.40a spec, Data offset is changed. | |
3085 | * Need to check the version-id and set data-offset for DATA register. | |
3086 | */ | |
3087 | host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); | |
3088 | dev_info(host->dev, "Version ID is %04x\n", host->verid); | |
3089 | ||
3090 | if (host->verid < DW_MMC_240A) | |
76184ac1 | 3091 | host->fifo_reg = host->regs + DATA_OFFSET; |
63008768 | 3092 | else |
76184ac1 | 3093 | host->fifo_reg = host->regs + DATA_240A_OFFSET; |
63008768 | 3094 | |
f95f3850 | 3095 | tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); |
780f22af SJ |
3096 | ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, |
3097 | host->irq_flags, "dw-mci", host); | |
f95f3850 | 3098 | if (ret) |
6130e7a9 | 3099 | goto err_dmaunmap; |
f95f3850 | 3100 | |
f95f3850 WN |
3101 | if (host->pdata->num_slots) |
3102 | host->num_slots = host->pdata->num_slots; | |
3103 | else | |
8a629d26 SL |
3104 | host->num_slots = 1; |
3105 | ||
3106 | if (host->num_slots < 1 || | |
3107 | host->num_slots > SDMMC_GET_SLOT_NUM(mci_readl(host, HCON))) { | |
3108 | dev_err(host->dev, | |
3109 | "Platform data must supply correct num_slots.\n"); | |
3110 | ret = -ENODEV; | |
3111 | goto err_clk_ciu; | |
3112 | } | |
f95f3850 | 3113 | |
2da1d7f2 | 3114 | /* |
fa0c3283 | 3115 | * Enable interrupts for command done, data over, data empty, |
2da1d7f2 YC |
3116 | * receive ready and error such as transmit, receive timeout, crc error |
3117 | */ | |
2da1d7f2 YC |
3118 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | |
3119 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
fa0c3283 | 3120 | DW_MCI_ERROR_FLAGS); |
0e3a22c0 SL |
3121 | /* Enable mci interrupt */ |
3122 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); | |
2da1d7f2 | 3123 | |
0e3a22c0 SL |
3124 | dev_info(host->dev, |
3125 | "DW MMC controller at irq %d,%d bit host data width,%u deep fifo\n", | |
2da1d7f2 YC |
3126 | host->irq, width, fifo_size); |
3127 | ||
f95f3850 WN |
3128 | /* We need at least one slot to succeed */ |
3129 | for (i = 0; i < host->num_slots; i++) { | |
3130 | ret = dw_mci_init_slot(host, i); | |
1c2215b7 TA |
3131 | if (ret) |
3132 | dev_dbg(host->dev, "slot %d init failed\n", i); | |
3133 | else | |
3134 | init_slots++; | |
3135 | } | |
3136 | ||
3137 | if (init_slots) { | |
3138 | dev_info(host->dev, "%d slots initialized\n", init_slots); | |
3139 | } else { | |
0e3a22c0 SL |
3140 | dev_dbg(host->dev, |
3141 | "attempted to initialize %d slots, but failed on all\n", | |
3142 | host->num_slots); | |
6130e7a9 | 3143 | goto err_dmaunmap; |
f95f3850 WN |
3144 | } |
3145 | ||
b793f658 DA |
3146 | /* Now that slots are all setup, we can enable card detect */ |
3147 | dw_mci_enable_cd(host); | |
3148 | ||
f95f3850 WN |
3149 | return 0; |
3150 | ||
f95f3850 WN |
3151 | err_dmaunmap: |
3152 | if (host->use_dma && host->dma_ops->exit) | |
3153 | host->dma_ops->exit(host); | |
f90a0612 TA |
3154 | |
3155 | err_clk_ciu: | |
780f22af | 3156 | if (!IS_ERR(host->ciu_clk)) |
f90a0612 | 3157 | clk_disable_unprepare(host->ciu_clk); |
780f22af | 3158 | |
f90a0612 | 3159 | err_clk_biu: |
780f22af | 3160 | if (!IS_ERR(host->biu_clk)) |
f90a0612 | 3161 | clk_disable_unprepare(host->biu_clk); |
780f22af | 3162 | |
f95f3850 WN |
3163 | return ret; |
3164 | } | |
62ca8034 | 3165 | EXPORT_SYMBOL(dw_mci_probe); |
f95f3850 | 3166 | |
62ca8034 | 3167 | void dw_mci_remove(struct dw_mci *host) |
f95f3850 | 3168 | { |
f95f3850 WN |
3169 | int i; |
3170 | ||
f95f3850 | 3171 | for (i = 0; i < host->num_slots; i++) { |
4a90920c | 3172 | dev_dbg(host->dev, "remove slot %d\n", i); |
f95f3850 WN |
3173 | if (host->slot[i]) |
3174 | dw_mci_cleanup_slot(host->slot[i], i); | |
3175 | } | |
3176 | ||
048fd7e6 PT |
3177 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
3178 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
3179 | ||
f95f3850 WN |
3180 | /* disable clock to CIU */ |
3181 | mci_writel(host, CLKENA, 0); | |
3182 | mci_writel(host, CLKSRC, 0); | |
3183 | ||
f95f3850 WN |
3184 | if (host->use_dma && host->dma_ops->exit) |
3185 | host->dma_ops->exit(host); | |
3186 | ||
f90a0612 TA |
3187 | if (!IS_ERR(host->ciu_clk)) |
3188 | clk_disable_unprepare(host->ciu_clk); | |
780f22af | 3189 | |
f90a0612 TA |
3190 | if (!IS_ERR(host->biu_clk)) |
3191 | clk_disable_unprepare(host->biu_clk); | |
f95f3850 | 3192 | } |
62ca8034 SH |
3193 | EXPORT_SYMBOL(dw_mci_remove); |
3194 | ||
3195 | ||
f95f3850 | 3196 | |
6fe8890d | 3197 | #ifdef CONFIG_PM_SLEEP |
f95f3850 WN |
3198 | /* |
3199 | * TODO: we should probably disable the clock to the card in the suspend path. | |
3200 | */ | |
62ca8034 | 3201 | int dw_mci_suspend(struct dw_mci *host) |
f95f3850 | 3202 | { |
3fc7eaef SL |
3203 | if (host->use_dma && host->dma_ops->exit) |
3204 | host->dma_ops->exit(host); | |
3205 | ||
f95f3850 WN |
3206 | return 0; |
3207 | } | |
62ca8034 | 3208 | EXPORT_SYMBOL(dw_mci_suspend); |
f95f3850 | 3209 | |
62ca8034 | 3210 | int dw_mci_resume(struct dw_mci *host) |
f95f3850 WN |
3211 | { |
3212 | int i, ret; | |
f95f3850 | 3213 | |
3a33a94c | 3214 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { |
e61cf118 JC |
3215 | ret = -ENODEV; |
3216 | return ret; | |
3217 | } | |
3218 | ||
3bfe619d | 3219 | if (host->use_dma && host->dma_ops->init) |
141a712a SJ |
3220 | host->dma_ops->init(host); |
3221 | ||
52426899 SJ |
3222 | /* |
3223 | * Restore the initial value at FIFOTH register | |
3224 | * And Invalidate the prev_blksz with zero | |
3225 | */ | |
e61cf118 | 3226 | mci_writel(host, FIFOTH, host->fifoth_val); |
52426899 | 3227 | host->prev_blksz = 0; |
e61cf118 | 3228 | |
2eb2944f DA |
3229 | /* Put in max timeout */ |
3230 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
3231 | ||
e61cf118 JC |
3232 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
3233 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
3234 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
fa0c3283 | 3235 | DW_MCI_ERROR_FLAGS); |
e61cf118 JC |
3236 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); |
3237 | ||
f95f3850 WN |
3238 | for (i = 0; i < host->num_slots; i++) { |
3239 | struct dw_mci_slot *slot = host->slot[i]; | |
0e3a22c0 | 3240 | |
f95f3850 WN |
3241 | if (!slot) |
3242 | continue; | |
ab269128 AK |
3243 | if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { |
3244 | dw_mci_set_ios(slot->mmc, &slot->mmc->ios); | |
3245 | dw_mci_setup_bus(slot, true); | |
3246 | } | |
f95f3850 | 3247 | } |
fa0c3283 DA |
3248 | |
3249 | /* Now that slots are all setup, we can enable card detect */ | |
3250 | dw_mci_enable_cd(host); | |
3251 | ||
f95f3850 WN |
3252 | return 0; |
3253 | } | |
62ca8034 | 3254 | EXPORT_SYMBOL(dw_mci_resume); |
6fe8890d JC |
3255 | #endif /* CONFIG_PM_SLEEP */ |
3256 | ||
f95f3850 WN |
3257 | static int __init dw_mci_init(void) |
3258 | { | |
8e1c4e4d | 3259 | pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); |
62ca8034 | 3260 | return 0; |
f95f3850 WN |
3261 | } |
3262 | ||
3263 | static void __exit dw_mci_exit(void) | |
3264 | { | |
f95f3850 WN |
3265 | } |
3266 | ||
3267 | module_init(dw_mci_init); | |
3268 | module_exit(dw_mci_exit); | |
3269 | ||
3270 | MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); | |
3271 | MODULE_AUTHOR("NXP Semiconductor VietNam"); | |
3272 | MODULE_AUTHOR("Imagination Technologies Ltd"); | |
3273 | MODULE_LICENSE("GPL v2"); |