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f95f3850 WN |
1 | /* |
2 | * Synopsys DesignWare Multimedia Card Interface driver | |
3 | * (Based on NXP driver for lpc 31xx) | |
4 | * | |
5 | * Copyright (C) 2009 NXP Semiconductors | |
6 | * Copyright (C) 2009, 2010 Imagination Technologies Ltd. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/blkdev.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/debugfs.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/platform_device.h> | |
f95f3850 WN |
25 | #include <linux/seq_file.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/stat.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/irq.h> | |
30 | #include <linux/mmc/host.h> | |
31 | #include <linux/mmc/mmc.h> | |
01730558 | 32 | #include <linux/mmc/sd.h> |
90c2143a | 33 | #include <linux/mmc/sdio.h> |
f95f3850 WN |
34 | #include <linux/mmc/dw_mmc.h> |
35 | #include <linux/bitops.h> | |
c07946a3 | 36 | #include <linux/regulator/consumer.h> |
c91eab4b | 37 | #include <linux/of.h> |
55a6ceb2 | 38 | #include <linux/of_gpio.h> |
bf626e55 | 39 | #include <linux/mmc/slot-gpio.h> |
f95f3850 WN |
40 | |
41 | #include "dw_mmc.h" | |
42 | ||
43 | /* Common flag combinations */ | |
3f7eec62 | 44 | #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \ |
f95f3850 WN |
45 | SDMMC_INT_HTO | SDMMC_INT_SBE | \ |
46 | SDMMC_INT_EBE) | |
47 | #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \ | |
48 | SDMMC_INT_RESP_ERR) | |
49 | #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \ | |
50 | DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE) | |
51 | #define DW_MCI_SEND_STATUS 1 | |
52 | #define DW_MCI_RECV_STATUS 2 | |
53 | #define DW_MCI_DMA_THRESHOLD 16 | |
54 | ||
1f44a2a5 SJ |
55 | #define DW_MCI_FREQ_MAX 200000000 /* unit: HZ */ |
56 | #define DW_MCI_FREQ_MIN 400000 /* unit: HZ */ | |
57 | ||
f95f3850 | 58 | #ifdef CONFIG_MMC_DW_IDMAC |
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) \ | |
71 | ((d)->des2 = ((d)->des2 & 0x03ffe000) | ((s) & 0x1fff)) | |
72 | ||
73 | u32 des3; /* Reserved */ | |
74 | ||
75 | u32 des4; /* Lower 32-bits of Buffer Address Pointer 1*/ | |
76 | u32 des5; /* Upper 32-bits of Buffer Address Pointer 1*/ | |
77 | ||
78 | u32 des6; /* Lower 32-bits of Next Descriptor Address */ | |
79 | u32 des7; /* Upper 32-bits of Next Descriptor Address */ | |
80 | }; | |
81 | ||
f95f3850 WN |
82 | struct idmac_desc { |
83 | u32 des0; /* Control Descriptor */ | |
84 | #define IDMAC_DES0_DIC BIT(1) | |
85 | #define IDMAC_DES0_LD BIT(2) | |
86 | #define IDMAC_DES0_FD BIT(3) | |
87 | #define IDMAC_DES0_CH BIT(4) | |
88 | #define IDMAC_DES0_ER BIT(5) | |
89 | #define IDMAC_DES0_CES BIT(30) | |
90 | #define IDMAC_DES0_OWN BIT(31) | |
91 | ||
92 | u32 des1; /* Buffer sizes */ | |
93 | #define IDMAC_SET_BUFFER1_SIZE(d, s) \ | |
9b7bbe10 | 94 | ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff)) |
f95f3850 WN |
95 | |
96 | u32 des2; /* buffer 1 physical address */ | |
97 | ||
98 | u32 des3; /* buffer 2 physical address */ | |
99 | }; | |
100 | #endif /* CONFIG_MMC_DW_IDMAC */ | |
101 | ||
3a33a94c | 102 | static bool dw_mci_reset(struct dw_mci *host); |
536f6b91 | 103 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset); |
31bff450 | 104 | |
f95f3850 WN |
105 | #if defined(CONFIG_DEBUG_FS) |
106 | static int dw_mci_req_show(struct seq_file *s, void *v) | |
107 | { | |
108 | struct dw_mci_slot *slot = s->private; | |
109 | struct mmc_request *mrq; | |
110 | struct mmc_command *cmd; | |
111 | struct mmc_command *stop; | |
112 | struct mmc_data *data; | |
113 | ||
114 | /* Make sure we get a consistent snapshot */ | |
115 | spin_lock_bh(&slot->host->lock); | |
116 | mrq = slot->mrq; | |
117 | ||
118 | if (mrq) { | |
119 | cmd = mrq->cmd; | |
120 | data = mrq->data; | |
121 | stop = mrq->stop; | |
122 | ||
123 | if (cmd) | |
124 | seq_printf(s, | |
125 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
126 | cmd->opcode, cmd->arg, cmd->flags, | |
127 | cmd->resp[0], cmd->resp[1], cmd->resp[2], | |
128 | cmd->resp[2], cmd->error); | |
129 | if (data) | |
130 | seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", | |
131 | data->bytes_xfered, data->blocks, | |
132 | data->blksz, data->flags, data->error); | |
133 | if (stop) | |
134 | seq_printf(s, | |
135 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
136 | stop->opcode, stop->arg, stop->flags, | |
137 | stop->resp[0], stop->resp[1], stop->resp[2], | |
138 | stop->resp[2], stop->error); | |
139 | } | |
140 | ||
141 | spin_unlock_bh(&slot->host->lock); | |
142 | ||
143 | return 0; | |
144 | } | |
145 | ||
146 | static int dw_mci_req_open(struct inode *inode, struct file *file) | |
147 | { | |
148 | return single_open(file, dw_mci_req_show, inode->i_private); | |
149 | } | |
150 | ||
151 | static const struct file_operations dw_mci_req_fops = { | |
152 | .owner = THIS_MODULE, | |
153 | .open = dw_mci_req_open, | |
154 | .read = seq_read, | |
155 | .llseek = seq_lseek, | |
156 | .release = single_release, | |
157 | }; | |
158 | ||
159 | static int dw_mci_regs_show(struct seq_file *s, void *v) | |
160 | { | |
161 | seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); | |
162 | seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); | |
163 | seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); | |
164 | seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); | |
165 | seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); | |
166 | seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int dw_mci_regs_open(struct inode *inode, struct file *file) | |
172 | { | |
173 | return single_open(file, dw_mci_regs_show, inode->i_private); | |
174 | } | |
175 | ||
176 | static const struct file_operations dw_mci_regs_fops = { | |
177 | .owner = THIS_MODULE, | |
178 | .open = dw_mci_regs_open, | |
179 | .read = seq_read, | |
180 | .llseek = seq_lseek, | |
181 | .release = single_release, | |
182 | }; | |
183 | ||
184 | static void dw_mci_init_debugfs(struct dw_mci_slot *slot) | |
185 | { | |
186 | struct mmc_host *mmc = slot->mmc; | |
187 | struct dw_mci *host = slot->host; | |
188 | struct dentry *root; | |
189 | struct dentry *node; | |
190 | ||
191 | root = mmc->debugfs_root; | |
192 | if (!root) | |
193 | return; | |
194 | ||
195 | node = debugfs_create_file("regs", S_IRUSR, root, host, | |
196 | &dw_mci_regs_fops); | |
197 | if (!node) | |
198 | goto err; | |
199 | ||
200 | node = debugfs_create_file("req", S_IRUSR, root, slot, | |
201 | &dw_mci_req_fops); | |
202 | if (!node) | |
203 | goto err; | |
204 | ||
205 | node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); | |
206 | if (!node) | |
207 | goto err; | |
208 | ||
209 | node = debugfs_create_x32("pending_events", S_IRUSR, root, | |
210 | (u32 *)&host->pending_events); | |
211 | if (!node) | |
212 | goto err; | |
213 | ||
214 | node = debugfs_create_x32("completed_events", S_IRUSR, root, | |
215 | (u32 *)&host->completed_events); | |
216 | if (!node) | |
217 | goto err; | |
218 | ||
219 | return; | |
220 | ||
221 | err: | |
222 | dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); | |
223 | } | |
224 | #endif /* defined(CONFIG_DEBUG_FS) */ | |
225 | ||
01730558 DA |
226 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg); |
227 | ||
f95f3850 WN |
228 | static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) |
229 | { | |
230 | struct mmc_data *data; | |
800d78bf | 231 | struct dw_mci_slot *slot = mmc_priv(mmc); |
01730558 | 232 | struct dw_mci *host = slot->host; |
e95baf13 | 233 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
f95f3850 WN |
234 | u32 cmdr; |
235 | cmd->error = -EINPROGRESS; | |
236 | ||
237 | cmdr = cmd->opcode; | |
238 | ||
90c2143a SJ |
239 | if (cmd->opcode == MMC_STOP_TRANSMISSION || |
240 | cmd->opcode == MMC_GO_IDLE_STATE || | |
241 | cmd->opcode == MMC_GO_INACTIVE_STATE || | |
242 | (cmd->opcode == SD_IO_RW_DIRECT && | |
243 | ((cmd->arg >> 9) & 0x1FFFF) == SDIO_CCCR_ABORT)) | |
f95f3850 | 244 | cmdr |= SDMMC_CMD_STOP; |
4a1b27ad JC |
245 | else if (cmd->opcode != MMC_SEND_STATUS && cmd->data) |
246 | cmdr |= SDMMC_CMD_PRV_DAT_WAIT; | |
f95f3850 | 247 | |
01730558 DA |
248 | if (cmd->opcode == SD_SWITCH_VOLTAGE) { |
249 | u32 clk_en_a; | |
250 | ||
251 | /* Special bit makes CMD11 not die */ | |
252 | cmdr |= SDMMC_CMD_VOLT_SWITCH; | |
253 | ||
254 | /* Change state to continue to handle CMD11 weirdness */ | |
255 | WARN_ON(slot->host->state != STATE_SENDING_CMD); | |
256 | slot->host->state = STATE_SENDING_CMD11; | |
257 | ||
258 | /* | |
259 | * We need to disable low power mode (automatic clock stop) | |
260 | * while doing voltage switch so we don't confuse the card, | |
261 | * since stopping the clock is a specific part of the UHS | |
262 | * voltage change dance. | |
263 | * | |
264 | * Note that low power mode (SDMMC_CLKEN_LOW_PWR) will be | |
265 | * unconditionally turned back on in dw_mci_setup_bus() if it's | |
266 | * ever called with a non-zero clock. That shouldn't happen | |
267 | * until the voltage change is all done. | |
268 | */ | |
269 | clk_en_a = mci_readl(host, CLKENA); | |
270 | clk_en_a &= ~(SDMMC_CLKEN_LOW_PWR << slot->id); | |
271 | mci_writel(host, CLKENA, clk_en_a); | |
272 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
273 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
274 | } | |
275 | ||
f95f3850 WN |
276 | if (cmd->flags & MMC_RSP_PRESENT) { |
277 | /* We expect a response, so set this bit */ | |
278 | cmdr |= SDMMC_CMD_RESP_EXP; | |
279 | if (cmd->flags & MMC_RSP_136) | |
280 | cmdr |= SDMMC_CMD_RESP_LONG; | |
281 | } | |
282 | ||
283 | if (cmd->flags & MMC_RSP_CRC) | |
284 | cmdr |= SDMMC_CMD_RESP_CRC; | |
285 | ||
286 | data = cmd->data; | |
287 | if (data) { | |
288 | cmdr |= SDMMC_CMD_DAT_EXP; | |
289 | if (data->flags & MMC_DATA_STREAM) | |
290 | cmdr |= SDMMC_CMD_STRM_MODE; | |
291 | if (data->flags & MMC_DATA_WRITE) | |
292 | cmdr |= SDMMC_CMD_DAT_WR; | |
293 | } | |
294 | ||
cb27a843 JH |
295 | if (drv_data && drv_data->prepare_command) |
296 | drv_data->prepare_command(slot->host, &cmdr); | |
800d78bf | 297 | |
f95f3850 WN |
298 | return cmdr; |
299 | } | |
300 | ||
90c2143a SJ |
301 | static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) |
302 | { | |
303 | struct mmc_command *stop; | |
304 | u32 cmdr; | |
305 | ||
306 | if (!cmd->data) | |
307 | return 0; | |
308 | ||
309 | stop = &host->stop_abort; | |
310 | cmdr = cmd->opcode; | |
311 | memset(stop, 0, sizeof(struct mmc_command)); | |
312 | ||
313 | if (cmdr == MMC_READ_SINGLE_BLOCK || | |
314 | cmdr == MMC_READ_MULTIPLE_BLOCK || | |
315 | cmdr == MMC_WRITE_BLOCK || | |
316 | cmdr == MMC_WRITE_MULTIPLE_BLOCK) { | |
317 | stop->opcode = MMC_STOP_TRANSMISSION; | |
318 | stop->arg = 0; | |
319 | stop->flags = MMC_RSP_R1B | MMC_CMD_AC; | |
320 | } else if (cmdr == SD_IO_RW_EXTENDED) { | |
321 | stop->opcode = SD_IO_RW_DIRECT; | |
322 | stop->arg |= (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
323 | ((cmd->arg >> 28) & 0x7); | |
324 | stop->flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; | |
325 | } else { | |
326 | return 0; | |
327 | } | |
328 | ||
329 | cmdr = stop->opcode | SDMMC_CMD_STOP | | |
330 | SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; | |
331 | ||
332 | return cmdr; | |
333 | } | |
334 | ||
f95f3850 WN |
335 | static void dw_mci_start_command(struct dw_mci *host, |
336 | struct mmc_command *cmd, u32 cmd_flags) | |
337 | { | |
338 | host->cmd = cmd; | |
4a90920c | 339 | dev_vdbg(host->dev, |
f95f3850 WN |
340 | "start command: ARGR=0x%08x CMDR=0x%08x\n", |
341 | cmd->arg, cmd_flags); | |
342 | ||
343 | mci_writel(host, CMDARG, cmd->arg); | |
344 | wmb(); | |
345 | ||
346 | mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); | |
347 | } | |
348 | ||
90c2143a | 349 | static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) |
f95f3850 | 350 | { |
90c2143a SJ |
351 | struct mmc_command *stop = data->stop ? data->stop : &host->stop_abort; |
352 | dw_mci_start_command(host, stop, host->stop_cmdr); | |
f95f3850 WN |
353 | } |
354 | ||
355 | /* DMA interface functions */ | |
356 | static void dw_mci_stop_dma(struct dw_mci *host) | |
357 | { | |
03e8cb53 | 358 | if (host->using_dma) { |
f95f3850 WN |
359 | host->dma_ops->stop(host); |
360 | host->dma_ops->cleanup(host); | |
f95f3850 | 361 | } |
aa50f259 SJ |
362 | |
363 | /* Data transfer was stopped by the interrupt handler */ | |
364 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
f95f3850 WN |
365 | } |
366 | ||
9aa51408 SJ |
367 | static int dw_mci_get_dma_dir(struct mmc_data *data) |
368 | { | |
369 | if (data->flags & MMC_DATA_WRITE) | |
370 | return DMA_TO_DEVICE; | |
371 | else | |
372 | return DMA_FROM_DEVICE; | |
373 | } | |
374 | ||
9beee912 | 375 | #ifdef CONFIG_MMC_DW_IDMAC |
f95f3850 WN |
376 | static void dw_mci_dma_cleanup(struct dw_mci *host) |
377 | { | |
378 | struct mmc_data *data = host->data; | |
379 | ||
380 | if (data) | |
9aa51408 | 381 | if (!data->host_cookie) |
4a90920c | 382 | dma_unmap_sg(host->dev, |
9aa51408 SJ |
383 | data->sg, |
384 | data->sg_len, | |
385 | dw_mci_get_dma_dir(data)); | |
f95f3850 WN |
386 | } |
387 | ||
5ce9d961 SJ |
388 | static void dw_mci_idmac_reset(struct dw_mci *host) |
389 | { | |
390 | u32 bmod = mci_readl(host, BMOD); | |
391 | /* Software reset of DMA */ | |
392 | bmod |= SDMMC_IDMAC_SWRESET; | |
393 | mci_writel(host, BMOD, bmod); | |
394 | } | |
395 | ||
f95f3850 WN |
396 | static void dw_mci_idmac_stop_dma(struct dw_mci *host) |
397 | { | |
398 | u32 temp; | |
399 | ||
400 | /* Disable and reset the IDMAC interface */ | |
401 | temp = mci_readl(host, CTRL); | |
402 | temp &= ~SDMMC_CTRL_USE_IDMAC; | |
403 | temp |= SDMMC_CTRL_DMA_RESET; | |
404 | mci_writel(host, CTRL, temp); | |
405 | ||
406 | /* Stop the IDMAC running */ | |
407 | temp = mci_readl(host, BMOD); | |
a5289a43 | 408 | temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); |
5ce9d961 | 409 | temp |= SDMMC_IDMAC_SWRESET; |
f95f3850 WN |
410 | mci_writel(host, BMOD, temp); |
411 | } | |
412 | ||
413 | static void dw_mci_idmac_complete_dma(struct dw_mci *host) | |
414 | { | |
415 | struct mmc_data *data = host->data; | |
416 | ||
4a90920c | 417 | dev_vdbg(host->dev, "DMA complete\n"); |
f95f3850 WN |
418 | |
419 | host->dma_ops->cleanup(host); | |
420 | ||
421 | /* | |
422 | * If the card was removed, data will be NULL. No point in trying to | |
423 | * send the stop command or waiting for NBUSY in this case. | |
424 | */ | |
425 | if (data) { | |
426 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
427 | tasklet_schedule(&host->tasklet); | |
428 | } | |
429 | } | |
430 | ||
431 | static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, | |
432 | unsigned int sg_len) | |
433 | { | |
434 | int i; | |
69d99fdc PT |
435 | if (host->dma_64bit_address == 1) { |
436 | struct idmac_desc_64addr *desc = host->sg_cpu; | |
437 | ||
438 | for (i = 0; i < sg_len; i++, desc++) { | |
439 | unsigned int length = sg_dma_len(&data->sg[i]); | |
440 | u64 mem_addr = sg_dma_address(&data->sg[i]); | |
f95f3850 | 441 | |
69d99fdc PT |
442 | /* |
443 | * Set the OWN bit and disable interrupts for this | |
444 | * descriptor | |
445 | */ | |
446 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | | |
447 | IDMAC_DES0_CH; | |
448 | /* Buffer length */ | |
449 | IDMAC_64ADDR_SET_BUFFER1_SIZE(desc, length); | |
450 | ||
451 | /* Physical address to DMA to/from */ | |
452 | desc->des4 = mem_addr & 0xffffffff; | |
453 | desc->des5 = mem_addr >> 32; | |
454 | } | |
f95f3850 | 455 | |
69d99fdc PT |
456 | /* Set first descriptor */ |
457 | desc = host->sg_cpu; | |
458 | desc->des0 |= IDMAC_DES0_FD; | |
f95f3850 | 459 | |
69d99fdc PT |
460 | /* Set last descriptor */ |
461 | desc = host->sg_cpu + (i - 1) * | |
462 | sizeof(struct idmac_desc_64addr); | |
463 | desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); | |
464 | desc->des0 |= IDMAC_DES0_LD; | |
f95f3850 | 465 | |
69d99fdc PT |
466 | } else { |
467 | struct idmac_desc *desc = host->sg_cpu; | |
468 | ||
469 | for (i = 0; i < sg_len; i++, desc++) { | |
470 | unsigned int length = sg_dma_len(&data->sg[i]); | |
471 | u32 mem_addr = sg_dma_address(&data->sg[i]); | |
472 | ||
473 | /* | |
474 | * Set the OWN bit and disable interrupts for this | |
475 | * descriptor | |
476 | */ | |
477 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | | |
478 | IDMAC_DES0_CH; | |
479 | /* Buffer length */ | |
480 | IDMAC_SET_BUFFER1_SIZE(desc, length); | |
f95f3850 | 481 | |
69d99fdc PT |
482 | /* Physical address to DMA to/from */ |
483 | desc->des2 = mem_addr; | |
484 | } | |
485 | ||
486 | /* Set first descriptor */ | |
487 | desc = host->sg_cpu; | |
488 | desc->des0 |= IDMAC_DES0_FD; | |
f95f3850 | 489 | |
69d99fdc PT |
490 | /* Set last descriptor */ |
491 | desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc); | |
492 | desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); | |
493 | desc->des0 |= IDMAC_DES0_LD; | |
494 | } | |
f95f3850 WN |
495 | |
496 | wmb(); | |
497 | } | |
498 | ||
499 | static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) | |
500 | { | |
501 | u32 temp; | |
502 | ||
503 | dw_mci_translate_sglist(host, host->data, sg_len); | |
504 | ||
536f6b91 SR |
505 | /* Make sure to reset DMA in case we did PIO before this */ |
506 | dw_mci_ctrl_reset(host, SDMMC_CTRL_DMA_RESET); | |
507 | dw_mci_idmac_reset(host); | |
508 | ||
f95f3850 WN |
509 | /* Select IDMAC interface */ |
510 | temp = mci_readl(host, CTRL); | |
511 | temp |= SDMMC_CTRL_USE_IDMAC; | |
512 | mci_writel(host, CTRL, temp); | |
513 | ||
514 | wmb(); | |
515 | ||
516 | /* Enable the IDMAC */ | |
517 | temp = mci_readl(host, BMOD); | |
a5289a43 | 518 | temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; |
f95f3850 WN |
519 | mci_writel(host, BMOD, temp); |
520 | ||
521 | /* Start it running */ | |
522 | mci_writel(host, PLDMND, 1); | |
523 | } | |
524 | ||
525 | static int dw_mci_idmac_init(struct dw_mci *host) | |
526 | { | |
897b69e7 | 527 | int i; |
f95f3850 | 528 | |
69d99fdc PT |
529 | if (host->dma_64bit_address == 1) { |
530 | struct idmac_desc_64addr *p; | |
531 | /* Number of descriptors in the ring buffer */ | |
532 | host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc_64addr); | |
533 | ||
534 | /* Forward link the descriptor list */ | |
535 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; | |
536 | i++, p++) { | |
537 | p->des6 = (host->sg_dma + | |
538 | (sizeof(struct idmac_desc_64addr) * | |
539 | (i + 1))) & 0xffffffff; | |
540 | ||
541 | p->des7 = (u64)(host->sg_dma + | |
542 | (sizeof(struct idmac_desc_64addr) * | |
543 | (i + 1))) >> 32; | |
544 | /* Initialize reserved and buffer size fields to "0" */ | |
545 | p->des1 = 0; | |
546 | p->des2 = 0; | |
547 | p->des3 = 0; | |
548 | } | |
f95f3850 | 549 | |
69d99fdc PT |
550 | /* Set the last descriptor as the end-of-ring descriptor */ |
551 | p->des6 = host->sg_dma & 0xffffffff; | |
552 | p->des7 = (u64)host->sg_dma >> 32; | |
553 | p->des0 = IDMAC_DES0_ER; | |
f95f3850 | 554 | |
69d99fdc PT |
555 | } else { |
556 | struct idmac_desc *p; | |
557 | /* Number of descriptors in the ring buffer */ | |
558 | host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); | |
559 | ||
560 | /* Forward link the descriptor list */ | |
561 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) | |
562 | p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * | |
563 | (i + 1)); | |
564 | ||
565 | /* Set the last descriptor as the end-of-ring descriptor */ | |
566 | p->des3 = host->sg_dma; | |
567 | p->des0 = IDMAC_DES0_ER; | |
568 | } | |
f95f3850 | 569 | |
5ce9d961 | 570 | dw_mci_idmac_reset(host); |
141a712a | 571 | |
69d99fdc PT |
572 | if (host->dma_64bit_address == 1) { |
573 | /* Mask out interrupts - get Tx & Rx complete only */ | |
574 | mci_writel(host, IDSTS64, IDMAC_INT_CLR); | |
575 | mci_writel(host, IDINTEN64, SDMMC_IDMAC_INT_NI | | |
576 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
577 | ||
578 | /* Set the descriptor base address */ | |
579 | mci_writel(host, DBADDRL, host->sg_dma & 0xffffffff); | |
580 | mci_writel(host, DBADDRU, (u64)host->sg_dma >> 32); | |
581 | ||
582 | } else { | |
583 | /* Mask out interrupts - get Tx & Rx complete only */ | |
584 | mci_writel(host, IDSTS, IDMAC_INT_CLR); | |
585 | mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | | |
586 | SDMMC_IDMAC_INT_RI | SDMMC_IDMAC_INT_TI); | |
587 | ||
588 | /* Set the descriptor base address */ | |
589 | mci_writel(host, DBADDR, host->sg_dma); | |
590 | } | |
f95f3850 | 591 | |
f95f3850 WN |
592 | return 0; |
593 | } | |
594 | ||
8e2b36ea | 595 | static const struct dw_mci_dma_ops dw_mci_idmac_ops = { |
885c3e80 SJ |
596 | .init = dw_mci_idmac_init, |
597 | .start = dw_mci_idmac_start_dma, | |
598 | .stop = dw_mci_idmac_stop_dma, | |
599 | .complete = dw_mci_idmac_complete_dma, | |
600 | .cleanup = dw_mci_dma_cleanup, | |
601 | }; | |
602 | #endif /* CONFIG_MMC_DW_IDMAC */ | |
603 | ||
9aa51408 SJ |
604 | static int dw_mci_pre_dma_transfer(struct dw_mci *host, |
605 | struct mmc_data *data, | |
606 | bool next) | |
f95f3850 WN |
607 | { |
608 | struct scatterlist *sg; | |
9aa51408 | 609 | unsigned int i, sg_len; |
03e8cb53 | 610 | |
9aa51408 SJ |
611 | if (!next && data->host_cookie) |
612 | return data->host_cookie; | |
f95f3850 WN |
613 | |
614 | /* | |
615 | * We don't do DMA on "complex" transfers, i.e. with | |
616 | * non-word-aligned buffers or lengths. Also, we don't bother | |
617 | * with all the DMA setup overhead for short transfers. | |
618 | */ | |
619 | if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) | |
620 | return -EINVAL; | |
9aa51408 | 621 | |
f95f3850 WN |
622 | if (data->blksz & 3) |
623 | return -EINVAL; | |
624 | ||
625 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
626 | if (sg->offset & 3 || sg->length & 3) | |
627 | return -EINVAL; | |
628 | } | |
629 | ||
4a90920c | 630 | sg_len = dma_map_sg(host->dev, |
9aa51408 SJ |
631 | data->sg, |
632 | data->sg_len, | |
633 | dw_mci_get_dma_dir(data)); | |
634 | if (sg_len == 0) | |
635 | return -EINVAL; | |
03e8cb53 | 636 | |
9aa51408 SJ |
637 | if (next) |
638 | data->host_cookie = sg_len; | |
f95f3850 | 639 | |
9aa51408 SJ |
640 | return sg_len; |
641 | } | |
642 | ||
9aa51408 SJ |
643 | static void dw_mci_pre_req(struct mmc_host *mmc, |
644 | struct mmc_request *mrq, | |
645 | bool is_first_req) | |
646 | { | |
647 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
648 | struct mmc_data *data = mrq->data; | |
649 | ||
650 | if (!slot->host->use_dma || !data) | |
651 | return; | |
652 | ||
653 | if (data->host_cookie) { | |
654 | data->host_cookie = 0; | |
655 | return; | |
656 | } | |
657 | ||
658 | if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) | |
659 | data->host_cookie = 0; | |
660 | } | |
661 | ||
662 | static void dw_mci_post_req(struct mmc_host *mmc, | |
663 | struct mmc_request *mrq, | |
664 | int err) | |
665 | { | |
666 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
667 | struct mmc_data *data = mrq->data; | |
668 | ||
669 | if (!slot->host->use_dma || !data) | |
670 | return; | |
671 | ||
672 | if (data->host_cookie) | |
4a90920c | 673 | dma_unmap_sg(slot->host->dev, |
9aa51408 SJ |
674 | data->sg, |
675 | data->sg_len, | |
676 | dw_mci_get_dma_dir(data)); | |
677 | data->host_cookie = 0; | |
678 | } | |
679 | ||
52426899 SJ |
680 | static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) |
681 | { | |
682 | #ifdef CONFIG_MMC_DW_IDMAC | |
683 | unsigned int blksz = data->blksz; | |
684 | const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; | |
685 | u32 fifo_width = 1 << host->data_shift; | |
686 | u32 blksz_depth = blksz / fifo_width, fifoth_val; | |
687 | u32 msize = 0, rx_wmark = 1, tx_wmark, tx_wmark_invers; | |
688 | int idx = (sizeof(mszs) / sizeof(mszs[0])) - 1; | |
689 | ||
690 | tx_wmark = (host->fifo_depth) / 2; | |
691 | tx_wmark_invers = host->fifo_depth - tx_wmark; | |
692 | ||
693 | /* | |
694 | * MSIZE is '1', | |
695 | * if blksz is not a multiple of the FIFO width | |
696 | */ | |
697 | if (blksz % fifo_width) { | |
698 | msize = 0; | |
699 | rx_wmark = 1; | |
700 | goto done; | |
701 | } | |
702 | ||
703 | do { | |
704 | if (!((blksz_depth % mszs[idx]) || | |
705 | (tx_wmark_invers % mszs[idx]))) { | |
706 | msize = idx; | |
707 | rx_wmark = mszs[idx] - 1; | |
708 | break; | |
709 | } | |
710 | } while (--idx > 0); | |
711 | /* | |
712 | * If idx is '0', it won't be tried | |
713 | * Thus, initial values are uesed | |
714 | */ | |
715 | done: | |
716 | fifoth_val = SDMMC_SET_FIFOTH(msize, rx_wmark, tx_wmark); | |
717 | mci_writel(host, FIFOTH, fifoth_val); | |
718 | #endif | |
719 | } | |
720 | ||
f1d2736c SJ |
721 | static void dw_mci_ctrl_rd_thld(struct dw_mci *host, struct mmc_data *data) |
722 | { | |
723 | unsigned int blksz = data->blksz; | |
724 | u32 blksz_depth, fifo_depth; | |
725 | u16 thld_size; | |
726 | ||
727 | WARN_ON(!(data->flags & MMC_DATA_READ)); | |
728 | ||
66dfd101 JH |
729 | /* |
730 | * CDTHRCTL doesn't exist prior to 240A (in fact that register offset is | |
731 | * in the FIFO region, so we really shouldn't access it). | |
732 | */ | |
733 | if (host->verid < DW_MMC_240A) | |
734 | return; | |
735 | ||
f1d2736c SJ |
736 | if (host->timing != MMC_TIMING_MMC_HS200 && |
737 | host->timing != MMC_TIMING_UHS_SDR104) | |
738 | goto disable; | |
739 | ||
740 | blksz_depth = blksz / (1 << host->data_shift); | |
741 | fifo_depth = host->fifo_depth; | |
742 | ||
743 | if (blksz_depth > fifo_depth) | |
744 | goto disable; | |
745 | ||
746 | /* | |
747 | * If (blksz_depth) >= (fifo_depth >> 1), should be 'thld_size <= blksz' | |
748 | * If (blksz_depth) < (fifo_depth >> 1), should be thld_size = blksz | |
749 | * Currently just choose blksz. | |
750 | */ | |
751 | thld_size = blksz; | |
752 | mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(thld_size, 1)); | |
753 | return; | |
754 | ||
755 | disable: | |
756 | mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(0, 0)); | |
757 | } | |
758 | ||
9aa51408 SJ |
759 | static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) |
760 | { | |
761 | int sg_len; | |
762 | u32 temp; | |
763 | ||
764 | host->using_dma = 0; | |
765 | ||
766 | /* If we don't have a channel, we can't do DMA */ | |
767 | if (!host->use_dma) | |
768 | return -ENODEV; | |
769 | ||
770 | sg_len = dw_mci_pre_dma_transfer(host, data, 0); | |
a99aa9b9 SJ |
771 | if (sg_len < 0) { |
772 | host->dma_ops->stop(host); | |
9aa51408 | 773 | return sg_len; |
a99aa9b9 | 774 | } |
9aa51408 SJ |
775 | |
776 | host->using_dma = 1; | |
f95f3850 | 777 | |
4a90920c | 778 | dev_vdbg(host->dev, |
f95f3850 WN |
779 | "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", |
780 | (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, | |
781 | sg_len); | |
782 | ||
52426899 SJ |
783 | /* |
784 | * Decide the MSIZE and RX/TX Watermark. | |
785 | * If current block size is same with previous size, | |
786 | * no need to update fifoth. | |
787 | */ | |
788 | if (host->prev_blksz != data->blksz) | |
789 | dw_mci_adjust_fifoth(host, data); | |
790 | ||
f95f3850 WN |
791 | /* Enable the DMA interface */ |
792 | temp = mci_readl(host, CTRL); | |
793 | temp |= SDMMC_CTRL_DMA_ENABLE; | |
794 | mci_writel(host, CTRL, temp); | |
795 | ||
796 | /* Disable RX/TX IRQs, let DMA handle it */ | |
797 | temp = mci_readl(host, INTMASK); | |
798 | temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); | |
799 | mci_writel(host, INTMASK, temp); | |
800 | ||
801 | host->dma_ops->start(host, sg_len); | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) | |
807 | { | |
808 | u32 temp; | |
809 | ||
810 | data->error = -EINPROGRESS; | |
811 | ||
812 | WARN_ON(host->data); | |
813 | host->sg = NULL; | |
814 | host->data = data; | |
815 | ||
f1d2736c | 816 | if (data->flags & MMC_DATA_READ) { |
55c5efbc | 817 | host->dir_status = DW_MCI_RECV_STATUS; |
f1d2736c SJ |
818 | dw_mci_ctrl_rd_thld(host, data); |
819 | } else { | |
55c5efbc | 820 | host->dir_status = DW_MCI_SEND_STATUS; |
f1d2736c | 821 | } |
55c5efbc | 822 | |
f95f3850 | 823 | if (dw_mci_submit_data_dma(host, data)) { |
f9c2a0dc SJ |
824 | int flags = SG_MITER_ATOMIC; |
825 | if (host->data->flags & MMC_DATA_READ) | |
826 | flags |= SG_MITER_TO_SG; | |
827 | else | |
828 | flags |= SG_MITER_FROM_SG; | |
829 | ||
830 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
f95f3850 | 831 | host->sg = data->sg; |
34b664a2 JH |
832 | host->part_buf_start = 0; |
833 | host->part_buf_count = 0; | |
f95f3850 | 834 | |
b40af3aa | 835 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); |
f95f3850 WN |
836 | temp = mci_readl(host, INTMASK); |
837 | temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; | |
838 | mci_writel(host, INTMASK, temp); | |
839 | ||
840 | temp = mci_readl(host, CTRL); | |
841 | temp &= ~SDMMC_CTRL_DMA_ENABLE; | |
842 | mci_writel(host, CTRL, temp); | |
52426899 SJ |
843 | |
844 | /* | |
845 | * Use the initial fifoth_val for PIO mode. | |
846 | * If next issued data may be transfered by DMA mode, | |
847 | * prev_blksz should be invalidated. | |
848 | */ | |
849 | mci_writel(host, FIFOTH, host->fifoth_val); | |
850 | host->prev_blksz = 0; | |
851 | } else { | |
852 | /* | |
853 | * Keep the current block size. | |
854 | * It will be used to decide whether to update | |
855 | * fifoth register next time. | |
856 | */ | |
857 | host->prev_blksz = data->blksz; | |
f95f3850 WN |
858 | } |
859 | } | |
860 | ||
861 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) | |
862 | { | |
863 | struct dw_mci *host = slot->host; | |
864 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
865 | unsigned int cmd_status = 0; | |
866 | ||
867 | mci_writel(host, CMDARG, arg); | |
868 | wmb(); | |
869 | mci_writel(host, CMD, SDMMC_CMD_START | cmd); | |
870 | ||
871 | while (time_before(jiffies, timeout)) { | |
872 | cmd_status = mci_readl(host, CMD); | |
873 | if (!(cmd_status & SDMMC_CMD_START)) | |
874 | return; | |
875 | } | |
876 | dev_err(&slot->mmc->class_dev, | |
877 | "Timeout sending command (cmd %#x arg %#x status %#x)\n", | |
878 | cmd, arg, cmd_status); | |
879 | } | |
880 | ||
ab269128 | 881 | static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) |
f95f3850 WN |
882 | { |
883 | struct dw_mci *host = slot->host; | |
fdf492a1 | 884 | unsigned int clock = slot->clock; |
f95f3850 | 885 | u32 div; |
9623b5b9 | 886 | u32 clk_en_a; |
01730558 DA |
887 | u32 sdmmc_cmd_bits = SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT; |
888 | ||
889 | /* We must continue to set bit 28 in CMD until the change is complete */ | |
890 | if (host->state == STATE_WAITING_CMD11_DONE) | |
891 | sdmmc_cmd_bits |= SDMMC_CMD_VOLT_SWITCH; | |
f95f3850 | 892 | |
fdf492a1 DA |
893 | if (!clock) { |
894 | mci_writel(host, CLKENA, 0); | |
01730558 | 895 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
fdf492a1 DA |
896 | } else if (clock != host->current_speed || force_clkinit) { |
897 | div = host->bus_hz / clock; | |
898 | if (host->bus_hz % clock && host->bus_hz > clock) | |
f95f3850 WN |
899 | /* |
900 | * move the + 1 after the divide to prevent | |
901 | * over-clocking the card. | |
902 | */ | |
e419990b SJ |
903 | div += 1; |
904 | ||
fdf492a1 | 905 | div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; |
f95f3850 | 906 | |
fdf492a1 DA |
907 | if ((clock << div) != slot->__clk_old || force_clkinit) |
908 | dev_info(&slot->mmc->class_dev, | |
909 | "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", | |
910 | slot->id, host->bus_hz, clock, | |
911 | div ? ((host->bus_hz / div) >> 1) : | |
912 | host->bus_hz, div); | |
f95f3850 WN |
913 | |
914 | /* disable clock */ | |
915 | mci_writel(host, CLKENA, 0); | |
916 | mci_writel(host, CLKSRC, 0); | |
917 | ||
918 | /* inform CIU */ | |
01730558 | 919 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 WN |
920 | |
921 | /* set clock to desired speed */ | |
922 | mci_writel(host, CLKDIV, div); | |
923 | ||
924 | /* inform CIU */ | |
01730558 | 925 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 | 926 | |
9623b5b9 DA |
927 | /* enable clock; only low power if no SDIO */ |
928 | clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; | |
76756234 | 929 | if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->sdio_id))) |
9623b5b9 DA |
930 | clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; |
931 | mci_writel(host, CLKENA, clk_en_a); | |
f95f3850 WN |
932 | |
933 | /* inform CIU */ | |
01730558 | 934 | mci_send_cmd(slot, sdmmc_cmd_bits, 0); |
f95f3850 | 935 | |
fdf492a1 DA |
936 | /* keep the clock with reflecting clock dividor */ |
937 | slot->__clk_old = clock << div; | |
f95f3850 WN |
938 | } |
939 | ||
fdf492a1 DA |
940 | host->current_speed = clock; |
941 | ||
f95f3850 | 942 | /* Set the current slot bus width */ |
1d56c453 | 943 | mci_writel(host, CTYPE, (slot->ctype << slot->id)); |
f95f3850 WN |
944 | } |
945 | ||
053b3ce6 SJ |
946 | static void __dw_mci_start_request(struct dw_mci *host, |
947 | struct dw_mci_slot *slot, | |
948 | struct mmc_command *cmd) | |
f95f3850 WN |
949 | { |
950 | struct mmc_request *mrq; | |
f95f3850 WN |
951 | struct mmc_data *data; |
952 | u32 cmdflags; | |
953 | ||
954 | mrq = slot->mrq; | |
f95f3850 | 955 | |
f95f3850 WN |
956 | host->cur_slot = slot; |
957 | host->mrq = mrq; | |
958 | ||
959 | host->pending_events = 0; | |
960 | host->completed_events = 0; | |
e352c813 | 961 | host->cmd_status = 0; |
f95f3850 | 962 | host->data_status = 0; |
e352c813 | 963 | host->dir_status = 0; |
f95f3850 | 964 | |
053b3ce6 | 965 | data = cmd->data; |
f95f3850 | 966 | if (data) { |
f16afa88 | 967 | mci_writel(host, TMOUT, 0xFFFFFFFF); |
f95f3850 WN |
968 | mci_writel(host, BYTCNT, data->blksz*data->blocks); |
969 | mci_writel(host, BLKSIZ, data->blksz); | |
970 | } | |
971 | ||
f95f3850 WN |
972 | cmdflags = dw_mci_prepare_command(slot->mmc, cmd); |
973 | ||
974 | /* this is the first command, send the initialization clock */ | |
975 | if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) | |
976 | cmdflags |= SDMMC_CMD_INIT; | |
977 | ||
978 | if (data) { | |
979 | dw_mci_submit_data(host, data); | |
980 | wmb(); | |
981 | } | |
982 | ||
983 | dw_mci_start_command(host, cmd, cmdflags); | |
984 | ||
985 | if (mrq->stop) | |
986 | host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); | |
90c2143a SJ |
987 | else |
988 | host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); | |
f95f3850 WN |
989 | } |
990 | ||
053b3ce6 SJ |
991 | static void dw_mci_start_request(struct dw_mci *host, |
992 | struct dw_mci_slot *slot) | |
993 | { | |
994 | struct mmc_request *mrq = slot->mrq; | |
995 | struct mmc_command *cmd; | |
996 | ||
997 | cmd = mrq->sbc ? mrq->sbc : mrq->cmd; | |
998 | __dw_mci_start_request(host, slot, cmd); | |
999 | } | |
1000 | ||
7456caae | 1001 | /* must be called with host->lock held */ |
f95f3850 WN |
1002 | static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, |
1003 | struct mmc_request *mrq) | |
1004 | { | |
1005 | dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", | |
1006 | host->state); | |
1007 | ||
f95f3850 WN |
1008 | slot->mrq = mrq; |
1009 | ||
01730558 DA |
1010 | if (host->state == STATE_WAITING_CMD11_DONE) { |
1011 | dev_warn(&slot->mmc->class_dev, | |
1012 | "Voltage change didn't complete\n"); | |
1013 | /* | |
1014 | * this case isn't expected to happen, so we can | |
1015 | * either crash here or just try to continue on | |
1016 | * in the closest possible state | |
1017 | */ | |
1018 | host->state = STATE_IDLE; | |
1019 | } | |
1020 | ||
f95f3850 WN |
1021 | if (host->state == STATE_IDLE) { |
1022 | host->state = STATE_SENDING_CMD; | |
1023 | dw_mci_start_request(host, slot); | |
1024 | } else { | |
1025 | list_add_tail(&slot->queue_node, &host->queue); | |
1026 | } | |
f95f3850 WN |
1027 | } |
1028 | ||
1029 | static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
1030 | { | |
1031 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1032 | struct dw_mci *host = slot->host; | |
1033 | ||
1034 | WARN_ON(slot->mrq); | |
1035 | ||
7456caae JH |
1036 | /* |
1037 | * The check for card presence and queueing of the request must be | |
1038 | * atomic, otherwise the card could be removed in between and the | |
1039 | * request wouldn't fail until another card was inserted. | |
1040 | */ | |
1041 | spin_lock_bh(&host->lock); | |
1042 | ||
f95f3850 | 1043 | if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { |
7456caae | 1044 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
1045 | mrq->cmd->error = -ENOMEDIUM; |
1046 | mmc_request_done(mmc, mrq); | |
1047 | return; | |
1048 | } | |
1049 | ||
f95f3850 | 1050 | dw_mci_queue_request(host, slot, mrq); |
7456caae JH |
1051 | |
1052 | spin_unlock_bh(&host->lock); | |
f95f3850 WN |
1053 | } |
1054 | ||
1055 | static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
1056 | { | |
1057 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
e95baf13 | 1058 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
41babf75 | 1059 | u32 regs; |
51da2240 | 1060 | int ret; |
f95f3850 | 1061 | |
f95f3850 | 1062 | switch (ios->bus_width) { |
f95f3850 WN |
1063 | case MMC_BUS_WIDTH_4: |
1064 | slot->ctype = SDMMC_CTYPE_4BIT; | |
1065 | break; | |
c9b2a06f JC |
1066 | case MMC_BUS_WIDTH_8: |
1067 | slot->ctype = SDMMC_CTYPE_8BIT; | |
1068 | break; | |
b2f7cb45 JC |
1069 | default: |
1070 | /* set default 1 bit mode */ | |
1071 | slot->ctype = SDMMC_CTYPE_1BIT; | |
f95f3850 WN |
1072 | } |
1073 | ||
3f514291 SJ |
1074 | regs = mci_readl(slot->host, UHS_REG); |
1075 | ||
41babf75 | 1076 | /* DDR mode set */ |
cab3a802 | 1077 | if (ios->timing == MMC_TIMING_MMC_DDR52) |
c69042a5 | 1078 | regs |= ((0x1 << slot->id) << 16); |
3f514291 | 1079 | else |
c69042a5 | 1080 | regs &= ~((0x1 << slot->id) << 16); |
3f514291 SJ |
1081 | |
1082 | mci_writel(slot->host, UHS_REG, regs); | |
f1d2736c | 1083 | slot->host->timing = ios->timing; |
41babf75 | 1084 | |
fdf492a1 DA |
1085 | /* |
1086 | * Use mirror of ios->clock to prevent race with mmc | |
1087 | * core ios update when finding the minimum. | |
1088 | */ | |
1089 | slot->clock = ios->clock; | |
f95f3850 | 1090 | |
cb27a843 JH |
1091 | if (drv_data && drv_data->set_ios) |
1092 | drv_data->set_ios(slot->host, ios); | |
800d78bf | 1093 | |
bf7cb224 JC |
1094 | /* Slot specific timing and width adjustment */ |
1095 | dw_mci_setup_bus(slot, false); | |
1096 | ||
01730558 DA |
1097 | if (slot->host->state == STATE_WAITING_CMD11_DONE && ios->clock != 0) |
1098 | slot->host->state = STATE_IDLE; | |
1099 | ||
f95f3850 WN |
1100 | switch (ios->power_mode) { |
1101 | case MMC_POWER_UP: | |
51da2240 YC |
1102 | if (!IS_ERR(mmc->supply.vmmc)) { |
1103 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, | |
1104 | ios->vdd); | |
1105 | if (ret) { | |
1106 | dev_err(slot->host->dev, | |
1107 | "failed to enable vmmc regulator\n"); | |
1108 | /*return, if failed turn on vmmc*/ | |
1109 | return; | |
1110 | } | |
1111 | } | |
1112 | if (!IS_ERR(mmc->supply.vqmmc) && !slot->host->vqmmc_enabled) { | |
1113 | ret = regulator_enable(mmc->supply.vqmmc); | |
1114 | if (ret < 0) | |
1115 | dev_err(slot->host->dev, | |
1116 | "failed to enable vqmmc regulator\n"); | |
1117 | else | |
1118 | slot->host->vqmmc_enabled = true; | |
1119 | } | |
f95f3850 | 1120 | set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); |
4366dcc5 JC |
1121 | regs = mci_readl(slot->host, PWREN); |
1122 | regs |= (1 << slot->id); | |
1123 | mci_writel(slot->host, PWREN, regs); | |
e6f34e2f JH |
1124 | break; |
1125 | case MMC_POWER_OFF: | |
51da2240 YC |
1126 | if (!IS_ERR(mmc->supply.vmmc)) |
1127 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); | |
1128 | ||
1129 | if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) { | |
1130 | regulator_disable(mmc->supply.vqmmc); | |
1131 | slot->host->vqmmc_enabled = false; | |
1132 | } | |
1133 | ||
4366dcc5 JC |
1134 | regs = mci_readl(slot->host, PWREN); |
1135 | regs &= ~(1 << slot->id); | |
1136 | mci_writel(slot->host, PWREN, regs); | |
f95f3850 WN |
1137 | break; |
1138 | default: | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | ||
01730558 DA |
1143 | static int dw_mci_card_busy(struct mmc_host *mmc) |
1144 | { | |
1145 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1146 | u32 status; | |
1147 | ||
1148 | /* | |
1149 | * Check the busy bit which is low when DAT[3:0] | |
1150 | * (the data lines) are 0000 | |
1151 | */ | |
1152 | status = mci_readl(slot->host, STATUS); | |
1153 | ||
1154 | return !!(status & SDMMC_STATUS_BUSY); | |
1155 | } | |
1156 | ||
1157 | static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) | |
1158 | { | |
1159 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1160 | struct dw_mci *host = slot->host; | |
1161 | u32 uhs; | |
1162 | u32 v18 = SDMMC_UHS_18V << slot->id; | |
1163 | int min_uv, max_uv; | |
1164 | int ret; | |
1165 | ||
1166 | /* | |
1167 | * Program the voltage. Note that some instances of dw_mmc may use | |
1168 | * the UHS_REG for this. For other instances (like exynos) the UHS_REG | |
1169 | * does no harm but you need to set the regulator directly. Try both. | |
1170 | */ | |
1171 | uhs = mci_readl(host, UHS_REG); | |
1172 | if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { | |
1173 | min_uv = 2700000; | |
1174 | max_uv = 3600000; | |
1175 | uhs &= ~v18; | |
1176 | } else { | |
1177 | min_uv = 1700000; | |
1178 | max_uv = 1950000; | |
1179 | uhs |= v18; | |
1180 | } | |
1181 | if (!IS_ERR(mmc->supply.vqmmc)) { | |
1182 | ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv); | |
1183 | ||
1184 | if (ret) { | |
b19caf37 | 1185 | dev_dbg(&mmc->class_dev, |
01730558 DA |
1186 | "Regulator set error %d: %d - %d\n", |
1187 | ret, min_uv, max_uv); | |
1188 | return ret; | |
1189 | } | |
1190 | } | |
1191 | mci_writel(host, UHS_REG, uhs); | |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
f95f3850 WN |
1196 | static int dw_mci_get_ro(struct mmc_host *mmc) |
1197 | { | |
1198 | int read_only; | |
1199 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
9795a846 | 1200 | int gpio_ro = mmc_gpio_get_ro(mmc); |
f95f3850 WN |
1201 | |
1202 | /* Use platform get_ro function, else try on board write protect */ | |
26375b5c JC |
1203 | if ((slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT) || |
1204 | (slot->host->quirks & DW_MCI_QUIRK_NO_WRITE_PROTECT)) | |
b4967aa5 | 1205 | read_only = 0; |
9795a846 JC |
1206 | else if (!IS_ERR_VALUE(gpio_ro)) |
1207 | read_only = gpio_ro; | |
f95f3850 WN |
1208 | else |
1209 | read_only = | |
1210 | mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; | |
1211 | ||
1212 | dev_dbg(&mmc->class_dev, "card is %s\n", | |
1213 | read_only ? "read-only" : "read-write"); | |
1214 | ||
1215 | return read_only; | |
1216 | } | |
1217 | ||
1218 | static int dw_mci_get_cd(struct mmc_host *mmc) | |
1219 | { | |
1220 | int present; | |
1221 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1222 | struct dw_mci_board *brd = slot->host->pdata; | |
7cf347bd ZG |
1223 | struct dw_mci *host = slot->host; |
1224 | int gpio_cd = mmc_gpio_get_cd(mmc); | |
f95f3850 WN |
1225 | |
1226 | /* Use platform get_cd function, else try onboard card detect */ | |
fc3d7720 JC |
1227 | if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION) |
1228 | present = 1; | |
bf626e55 | 1229 | else if (!IS_ERR_VALUE(gpio_cd)) |
7cf347bd | 1230 | present = gpio_cd; |
f95f3850 WN |
1231 | else |
1232 | present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) | |
1233 | == 0 ? 1 : 0; | |
1234 | ||
7cf347bd | 1235 | spin_lock_bh(&host->lock); |
bf626e55 ZG |
1236 | if (present) { |
1237 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1238 | dev_dbg(&mmc->class_dev, "card is present\n"); |
bf626e55 ZG |
1239 | } else { |
1240 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1241 | dev_dbg(&mmc->class_dev, "card is not present\n"); |
bf626e55 | 1242 | } |
7cf347bd | 1243 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
1244 | |
1245 | return present; | |
1246 | } | |
1247 | ||
9623b5b9 DA |
1248 | /* |
1249 | * Disable lower power mode. | |
1250 | * | |
1251 | * Low power mode will stop the card clock when idle. According to the | |
1252 | * description of the CLKENA register we should disable low power mode | |
1253 | * for SDIO cards if we need SDIO interrupts to work. | |
1254 | * | |
1255 | * This function is fast if low power mode is already disabled. | |
1256 | */ | |
1257 | static void dw_mci_disable_low_power(struct dw_mci_slot *slot) | |
1258 | { | |
1259 | struct dw_mci *host = slot->host; | |
1260 | u32 clk_en_a; | |
1261 | const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; | |
1262 | ||
1263 | clk_en_a = mci_readl(host, CLKENA); | |
1264 | ||
1265 | if (clk_en_a & clken_low_pwr) { | |
1266 | mci_writel(host, CLKENA, clk_en_a & ~clken_low_pwr); | |
1267 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
1268 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
1269 | } | |
1270 | } | |
1271 | ||
1a5c8e1f SH |
1272 | static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) |
1273 | { | |
1274 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1275 | struct dw_mci *host = slot->host; | |
1276 | u32 int_mask; | |
1277 | ||
1278 | /* Enable/disable Slot Specific SDIO interrupt */ | |
1279 | int_mask = mci_readl(host, INTMASK); | |
1280 | if (enb) { | |
9623b5b9 DA |
1281 | /* |
1282 | * Turn off low power mode if it was enabled. This is a bit of | |
1283 | * a heavy operation and we disable / enable IRQs a lot, so | |
1284 | * we'll leave low power mode disabled and it will get | |
1285 | * re-enabled again in dw_mci_setup_bus(). | |
1286 | */ | |
1287 | dw_mci_disable_low_power(slot); | |
1288 | ||
1a5c8e1f | 1289 | mci_writel(host, INTMASK, |
76756234 | 1290 | (int_mask | SDMMC_INT_SDIO(slot->sdio_id))); |
1a5c8e1f SH |
1291 | } else { |
1292 | mci_writel(host, INTMASK, | |
76756234 | 1293 | (int_mask & ~SDMMC_INT_SDIO(slot->sdio_id))); |
1a5c8e1f SH |
1294 | } |
1295 | } | |
1296 | ||
0976f16d SJ |
1297 | static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
1298 | { | |
1299 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1300 | struct dw_mci *host = slot->host; | |
1301 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
1302 | struct dw_mci_tuning_data tuning_data; | |
1303 | int err = -ENOSYS; | |
1304 | ||
1305 | if (opcode == MMC_SEND_TUNING_BLOCK_HS200) { | |
1306 | if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) { | |
1307 | tuning_data.blk_pattern = tuning_blk_pattern_8bit; | |
1308 | tuning_data.blksz = sizeof(tuning_blk_pattern_8bit); | |
1309 | } else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) { | |
1310 | tuning_data.blk_pattern = tuning_blk_pattern_4bit; | |
1311 | tuning_data.blksz = sizeof(tuning_blk_pattern_4bit); | |
1312 | } else { | |
1313 | return -EINVAL; | |
1314 | } | |
1315 | } else if (opcode == MMC_SEND_TUNING_BLOCK) { | |
1316 | tuning_data.blk_pattern = tuning_blk_pattern_4bit; | |
1317 | tuning_data.blksz = sizeof(tuning_blk_pattern_4bit); | |
1318 | } else { | |
1319 | dev_err(host->dev, | |
1320 | "Undefined command(%d) for tuning\n", opcode); | |
1321 | return -EINVAL; | |
1322 | } | |
1323 | ||
1324 | if (drv_data && drv_data->execute_tuning) | |
1325 | err = drv_data->execute_tuning(slot, opcode, &tuning_data); | |
1326 | return err; | |
1327 | } | |
1328 | ||
f95f3850 | 1329 | static const struct mmc_host_ops dw_mci_ops = { |
1a5c8e1f | 1330 | .request = dw_mci_request, |
9aa51408 SJ |
1331 | .pre_req = dw_mci_pre_req, |
1332 | .post_req = dw_mci_post_req, | |
1a5c8e1f SH |
1333 | .set_ios = dw_mci_set_ios, |
1334 | .get_ro = dw_mci_get_ro, | |
1335 | .get_cd = dw_mci_get_cd, | |
1336 | .enable_sdio_irq = dw_mci_enable_sdio_irq, | |
0976f16d | 1337 | .execute_tuning = dw_mci_execute_tuning, |
01730558 DA |
1338 | .card_busy = dw_mci_card_busy, |
1339 | .start_signal_voltage_switch = dw_mci_switch_voltage, | |
1340 | ||
f95f3850 WN |
1341 | }; |
1342 | ||
1343 | static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) | |
1344 | __releases(&host->lock) | |
1345 | __acquires(&host->lock) | |
1346 | { | |
1347 | struct dw_mci_slot *slot; | |
1348 | struct mmc_host *prev_mmc = host->cur_slot->mmc; | |
1349 | ||
1350 | WARN_ON(host->cmd || host->data); | |
1351 | ||
1352 | host->cur_slot->mrq = NULL; | |
1353 | host->mrq = NULL; | |
1354 | if (!list_empty(&host->queue)) { | |
1355 | slot = list_entry(host->queue.next, | |
1356 | struct dw_mci_slot, queue_node); | |
1357 | list_del(&slot->queue_node); | |
4a90920c | 1358 | dev_vdbg(host->dev, "list not empty: %s is next\n", |
f95f3850 WN |
1359 | mmc_hostname(slot->mmc)); |
1360 | host->state = STATE_SENDING_CMD; | |
1361 | dw_mci_start_request(host, slot); | |
1362 | } else { | |
4a90920c | 1363 | dev_vdbg(host->dev, "list empty\n"); |
01730558 DA |
1364 | |
1365 | if (host->state == STATE_SENDING_CMD11) | |
1366 | host->state = STATE_WAITING_CMD11_DONE; | |
1367 | else | |
1368 | host->state = STATE_IDLE; | |
f95f3850 WN |
1369 | } |
1370 | ||
1371 | spin_unlock(&host->lock); | |
1372 | mmc_request_done(prev_mmc, mrq); | |
1373 | spin_lock(&host->lock); | |
1374 | } | |
1375 | ||
e352c813 | 1376 | static int dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) |
f95f3850 WN |
1377 | { |
1378 | u32 status = host->cmd_status; | |
1379 | ||
1380 | host->cmd_status = 0; | |
1381 | ||
1382 | /* Read the response from the card (up to 16 bytes) */ | |
1383 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1384 | if (cmd->flags & MMC_RSP_136) { | |
1385 | cmd->resp[3] = mci_readl(host, RESP0); | |
1386 | cmd->resp[2] = mci_readl(host, RESP1); | |
1387 | cmd->resp[1] = mci_readl(host, RESP2); | |
1388 | cmd->resp[0] = mci_readl(host, RESP3); | |
1389 | } else { | |
1390 | cmd->resp[0] = mci_readl(host, RESP0); | |
1391 | cmd->resp[1] = 0; | |
1392 | cmd->resp[2] = 0; | |
1393 | cmd->resp[3] = 0; | |
1394 | } | |
1395 | } | |
1396 | ||
1397 | if (status & SDMMC_INT_RTO) | |
1398 | cmd->error = -ETIMEDOUT; | |
1399 | else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) | |
1400 | cmd->error = -EILSEQ; | |
1401 | else if (status & SDMMC_INT_RESP_ERR) | |
1402 | cmd->error = -EIO; | |
1403 | else | |
1404 | cmd->error = 0; | |
1405 | ||
1406 | if (cmd->error) { | |
1407 | /* newer ip versions need a delay between retries */ | |
1408 | if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY) | |
1409 | mdelay(20); | |
f95f3850 | 1410 | } |
e352c813 SJ |
1411 | |
1412 | return cmd->error; | |
1413 | } | |
1414 | ||
1415 | static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) | |
1416 | { | |
31bff450 | 1417 | u32 status = host->data_status; |
e352c813 SJ |
1418 | |
1419 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1420 | if (status & SDMMC_INT_DRTO) { | |
1421 | data->error = -ETIMEDOUT; | |
1422 | } else if (status & SDMMC_INT_DCRC) { | |
1423 | data->error = -EILSEQ; | |
1424 | } else if (status & SDMMC_INT_EBE) { | |
1425 | if (host->dir_status == | |
1426 | DW_MCI_SEND_STATUS) { | |
1427 | /* | |
1428 | * No data CRC status was returned. | |
1429 | * The number of bytes transferred | |
1430 | * will be exaggerated in PIO mode. | |
1431 | */ | |
1432 | data->bytes_xfered = 0; | |
1433 | data->error = -ETIMEDOUT; | |
1434 | } else if (host->dir_status == | |
1435 | DW_MCI_RECV_STATUS) { | |
1436 | data->error = -EIO; | |
1437 | } | |
1438 | } else { | |
1439 | /* SDMMC_INT_SBE is included */ | |
1440 | data->error = -EIO; | |
1441 | } | |
1442 | ||
e6cc0123 | 1443 | dev_dbg(host->dev, "data error, status 0x%08x\n", status); |
e352c813 SJ |
1444 | |
1445 | /* | |
1446 | * After an error, there may be data lingering | |
31bff450 | 1447 | * in the FIFO |
e352c813 | 1448 | */ |
3a33a94c | 1449 | dw_mci_reset(host); |
e352c813 SJ |
1450 | } else { |
1451 | data->bytes_xfered = data->blocks * data->blksz; | |
1452 | data->error = 0; | |
1453 | } | |
1454 | ||
1455 | return data->error; | |
f95f3850 WN |
1456 | } |
1457 | ||
1458 | static void dw_mci_tasklet_func(unsigned long priv) | |
1459 | { | |
1460 | struct dw_mci *host = (struct dw_mci *)priv; | |
1461 | struct mmc_data *data; | |
1462 | struct mmc_command *cmd; | |
e352c813 | 1463 | struct mmc_request *mrq; |
f95f3850 WN |
1464 | enum dw_mci_state state; |
1465 | enum dw_mci_state prev_state; | |
e352c813 | 1466 | unsigned int err; |
f95f3850 WN |
1467 | |
1468 | spin_lock(&host->lock); | |
1469 | ||
1470 | state = host->state; | |
1471 | data = host->data; | |
e352c813 | 1472 | mrq = host->mrq; |
f95f3850 WN |
1473 | |
1474 | do { | |
1475 | prev_state = state; | |
1476 | ||
1477 | switch (state) { | |
1478 | case STATE_IDLE: | |
01730558 | 1479 | case STATE_WAITING_CMD11_DONE: |
f95f3850 WN |
1480 | break; |
1481 | ||
01730558 | 1482 | case STATE_SENDING_CMD11: |
f95f3850 WN |
1483 | case STATE_SENDING_CMD: |
1484 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1485 | &host->pending_events)) | |
1486 | break; | |
1487 | ||
1488 | cmd = host->cmd; | |
1489 | host->cmd = NULL; | |
1490 | set_bit(EVENT_CMD_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1491 | err = dw_mci_command_complete(host, cmd); |
1492 | if (cmd == mrq->sbc && !err) { | |
053b3ce6 SJ |
1493 | prev_state = state = STATE_SENDING_CMD; |
1494 | __dw_mci_start_request(host, host->cur_slot, | |
e352c813 | 1495 | mrq->cmd); |
053b3ce6 SJ |
1496 | goto unlock; |
1497 | } | |
1498 | ||
e352c813 | 1499 | if (cmd->data && err) { |
71abb133 | 1500 | dw_mci_stop_dma(host); |
90c2143a SJ |
1501 | send_stop_abort(host, data); |
1502 | state = STATE_SENDING_STOP; | |
1503 | break; | |
71abb133 SJ |
1504 | } |
1505 | ||
e352c813 SJ |
1506 | if (!cmd->data || err) { |
1507 | dw_mci_request_end(host, mrq); | |
f95f3850 WN |
1508 | goto unlock; |
1509 | } | |
1510 | ||
1511 | prev_state = state = STATE_SENDING_DATA; | |
1512 | /* fall through */ | |
1513 | ||
1514 | case STATE_SENDING_DATA: | |
2aa35465 DA |
1515 | /* |
1516 | * We could get a data error and never a transfer | |
1517 | * complete so we'd better check for it here. | |
1518 | * | |
1519 | * Note that we don't really care if we also got a | |
1520 | * transfer complete; stopping the DMA and sending an | |
1521 | * abort won't hurt. | |
1522 | */ | |
f95f3850 WN |
1523 | if (test_and_clear_bit(EVENT_DATA_ERROR, |
1524 | &host->pending_events)) { | |
1525 | dw_mci_stop_dma(host); | |
90c2143a | 1526 | send_stop_abort(host, data); |
f95f3850 WN |
1527 | state = STATE_DATA_ERROR; |
1528 | break; | |
1529 | } | |
1530 | ||
1531 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1532 | &host->pending_events)) | |
1533 | break; | |
1534 | ||
1535 | set_bit(EVENT_XFER_COMPLETE, &host->completed_events); | |
2aa35465 DA |
1536 | |
1537 | /* | |
1538 | * Handle an EVENT_DATA_ERROR that might have shown up | |
1539 | * before the transfer completed. This might not have | |
1540 | * been caught by the check above because the interrupt | |
1541 | * could have gone off between the previous check and | |
1542 | * the check for transfer complete. | |
1543 | * | |
1544 | * Technically this ought not be needed assuming we | |
1545 | * get a DATA_COMPLETE eventually (we'll notice the | |
1546 | * error and end the request), but it shouldn't hurt. | |
1547 | * | |
1548 | * This has the advantage of sending the stop command. | |
1549 | */ | |
1550 | if (test_and_clear_bit(EVENT_DATA_ERROR, | |
1551 | &host->pending_events)) { | |
1552 | dw_mci_stop_dma(host); | |
1553 | send_stop_abort(host, data); | |
1554 | state = STATE_DATA_ERROR; | |
1555 | break; | |
1556 | } | |
f95f3850 | 1557 | prev_state = state = STATE_DATA_BUSY; |
2aa35465 | 1558 | |
f95f3850 WN |
1559 | /* fall through */ |
1560 | ||
1561 | case STATE_DATA_BUSY: | |
1562 | if (!test_and_clear_bit(EVENT_DATA_COMPLETE, | |
1563 | &host->pending_events)) | |
1564 | break; | |
1565 | ||
1566 | host->data = NULL; | |
1567 | set_bit(EVENT_DATA_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1568 | err = dw_mci_data_complete(host, data); |
1569 | ||
1570 | if (!err) { | |
1571 | if (!data->stop || mrq->sbc) { | |
17c8bc85 | 1572 | if (mrq->sbc && data->stop) |
e352c813 SJ |
1573 | data->stop->error = 0; |
1574 | dw_mci_request_end(host, mrq); | |
1575 | goto unlock; | |
f95f3850 | 1576 | } |
f95f3850 | 1577 | |
e352c813 SJ |
1578 | /* stop command for open-ended transfer*/ |
1579 | if (data->stop) | |
1580 | send_stop_abort(host, data); | |
2aa35465 DA |
1581 | } else { |
1582 | /* | |
1583 | * If we don't have a command complete now we'll | |
1584 | * never get one since we just reset everything; | |
1585 | * better end the request. | |
1586 | * | |
1587 | * If we do have a command complete we'll fall | |
1588 | * through to the SENDING_STOP command and | |
1589 | * everything will be peachy keen. | |
1590 | */ | |
1591 | if (!test_bit(EVENT_CMD_COMPLETE, | |
1592 | &host->pending_events)) { | |
1593 | host->cmd = NULL; | |
1594 | dw_mci_request_end(host, mrq); | |
1595 | goto unlock; | |
1596 | } | |
053b3ce6 SJ |
1597 | } |
1598 | ||
e352c813 SJ |
1599 | /* |
1600 | * If err has non-zero, | |
1601 | * stop-abort command has been already issued. | |
1602 | */ | |
f95f3850 | 1603 | prev_state = state = STATE_SENDING_STOP; |
e352c813 | 1604 | |
f95f3850 WN |
1605 | /* fall through */ |
1606 | ||
1607 | case STATE_SENDING_STOP: | |
1608 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1609 | &host->pending_events)) | |
1610 | break; | |
1611 | ||
71abb133 | 1612 | /* CMD error in data command */ |
31bff450 | 1613 | if (mrq->cmd->error && mrq->data) |
3a33a94c | 1614 | dw_mci_reset(host); |
71abb133 | 1615 | |
f95f3850 | 1616 | host->cmd = NULL; |
71abb133 | 1617 | host->data = NULL; |
90c2143a | 1618 | |
e352c813 SJ |
1619 | if (mrq->stop) |
1620 | dw_mci_command_complete(host, mrq->stop); | |
90c2143a SJ |
1621 | else |
1622 | host->cmd_status = 0; | |
1623 | ||
e352c813 | 1624 | dw_mci_request_end(host, mrq); |
f95f3850 WN |
1625 | goto unlock; |
1626 | ||
1627 | case STATE_DATA_ERROR: | |
1628 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1629 | &host->pending_events)) | |
1630 | break; | |
1631 | ||
1632 | state = STATE_DATA_BUSY; | |
1633 | break; | |
1634 | } | |
1635 | } while (state != prev_state); | |
1636 | ||
1637 | host->state = state; | |
1638 | unlock: | |
1639 | spin_unlock(&host->lock); | |
1640 | ||
1641 | } | |
1642 | ||
34b664a2 JH |
1643 | /* push final bytes to part_buf, only use during push */ |
1644 | static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1645 | { |
34b664a2 JH |
1646 | memcpy((void *)&host->part_buf, buf, cnt); |
1647 | host->part_buf_count = cnt; | |
1648 | } | |
f95f3850 | 1649 | |
34b664a2 JH |
1650 | /* append bytes to part_buf, only use during push */ |
1651 | static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1652 | { | |
1653 | cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); | |
1654 | memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); | |
1655 | host->part_buf_count += cnt; | |
1656 | return cnt; | |
1657 | } | |
f95f3850 | 1658 | |
34b664a2 JH |
1659 | /* pull first bytes from part_buf, only use during pull */ |
1660 | static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1661 | { | |
1662 | cnt = min(cnt, (int)host->part_buf_count); | |
1663 | if (cnt) { | |
1664 | memcpy(buf, (void *)&host->part_buf + host->part_buf_start, | |
1665 | cnt); | |
1666 | host->part_buf_count -= cnt; | |
1667 | host->part_buf_start += cnt; | |
f95f3850 | 1668 | } |
34b664a2 | 1669 | return cnt; |
f95f3850 WN |
1670 | } |
1671 | ||
34b664a2 JH |
1672 | /* pull final bytes from the part_buf, assuming it's just been filled */ |
1673 | static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1674 | { |
34b664a2 JH |
1675 | memcpy(buf, &host->part_buf, cnt); |
1676 | host->part_buf_start = cnt; | |
1677 | host->part_buf_count = (1 << host->data_shift) - cnt; | |
1678 | } | |
f95f3850 | 1679 | |
34b664a2 JH |
1680 | static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) |
1681 | { | |
cfbeb59c MC |
1682 | struct mmc_data *data = host->data; |
1683 | int init_cnt = cnt; | |
1684 | ||
34b664a2 JH |
1685 | /* try and push anything in the part_buf */ |
1686 | if (unlikely(host->part_buf_count)) { | |
1687 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1688 | buf += len; | |
1689 | cnt -= len; | |
cfbeb59c | 1690 | if (host->part_buf_count == 2) { |
4e0a5adf JC |
1691 | mci_writew(host, DATA(host->data_offset), |
1692 | host->part_buf16); | |
34b664a2 JH |
1693 | host->part_buf_count = 0; |
1694 | } | |
1695 | } | |
1696 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1697 | if (unlikely((unsigned long)buf & 0x1)) { | |
1698 | while (cnt >= 2) { | |
1699 | u16 aligned_buf[64]; | |
1700 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1701 | int items = len >> 1; | |
1702 | int i; | |
1703 | /* memcpy from input buffer into aligned buffer */ | |
1704 | memcpy(aligned_buf, buf, len); | |
1705 | buf += len; | |
1706 | cnt -= len; | |
1707 | /* push data from aligned buffer into fifo */ | |
1708 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1709 | mci_writew(host, DATA(host->data_offset), |
1710 | aligned_buf[i]); | |
34b664a2 JH |
1711 | } |
1712 | } else | |
1713 | #endif | |
1714 | { | |
1715 | u16 *pdata = buf; | |
1716 | for (; cnt >= 2; cnt -= 2) | |
4e0a5adf | 1717 | mci_writew(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1718 | buf = pdata; |
1719 | } | |
1720 | /* put anything remaining in the part_buf */ | |
1721 | if (cnt) { | |
1722 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
1723 | /* Push data if we have reached the expected data length */ |
1724 | if ((data->bytes_xfered + init_cnt) == | |
1725 | (data->blksz * data->blocks)) | |
4e0a5adf | 1726 | mci_writew(host, DATA(host->data_offset), |
cfbeb59c | 1727 | host->part_buf16); |
34b664a2 JH |
1728 | } |
1729 | } | |
f95f3850 | 1730 | |
34b664a2 JH |
1731 | static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) |
1732 | { | |
1733 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1734 | if (unlikely((unsigned long)buf & 0x1)) { | |
1735 | while (cnt >= 2) { | |
1736 | /* pull data from fifo into aligned buffer */ | |
1737 | u16 aligned_buf[64]; | |
1738 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1739 | int items = len >> 1; | |
1740 | int i; | |
1741 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1742 | aligned_buf[i] = mci_readw(host, |
1743 | DATA(host->data_offset)); | |
34b664a2 JH |
1744 | /* memcpy from aligned buffer into output buffer */ |
1745 | memcpy(buf, aligned_buf, len); | |
1746 | buf += len; | |
1747 | cnt -= len; | |
1748 | } | |
1749 | } else | |
1750 | #endif | |
1751 | { | |
1752 | u16 *pdata = buf; | |
1753 | for (; cnt >= 2; cnt -= 2) | |
4e0a5adf | 1754 | *pdata++ = mci_readw(host, DATA(host->data_offset)); |
34b664a2 JH |
1755 | buf = pdata; |
1756 | } | |
1757 | if (cnt) { | |
4e0a5adf | 1758 | host->part_buf16 = mci_readw(host, DATA(host->data_offset)); |
34b664a2 | 1759 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
1760 | } |
1761 | } | |
1762 | ||
1763 | static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) | |
1764 | { | |
cfbeb59c MC |
1765 | struct mmc_data *data = host->data; |
1766 | int init_cnt = cnt; | |
1767 | ||
34b664a2 JH |
1768 | /* try and push anything in the part_buf */ |
1769 | if (unlikely(host->part_buf_count)) { | |
1770 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1771 | buf += len; | |
1772 | cnt -= len; | |
cfbeb59c | 1773 | if (host->part_buf_count == 4) { |
4e0a5adf JC |
1774 | mci_writel(host, DATA(host->data_offset), |
1775 | host->part_buf32); | |
34b664a2 JH |
1776 | host->part_buf_count = 0; |
1777 | } | |
1778 | } | |
1779 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1780 | if (unlikely((unsigned long)buf & 0x3)) { | |
1781 | while (cnt >= 4) { | |
1782 | u32 aligned_buf[32]; | |
1783 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
1784 | int items = len >> 2; | |
1785 | int i; | |
1786 | /* memcpy from input buffer into aligned buffer */ | |
1787 | memcpy(aligned_buf, buf, len); | |
1788 | buf += len; | |
1789 | cnt -= len; | |
1790 | /* push data from aligned buffer into fifo */ | |
1791 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1792 | mci_writel(host, DATA(host->data_offset), |
1793 | aligned_buf[i]); | |
34b664a2 JH |
1794 | } |
1795 | } else | |
1796 | #endif | |
1797 | { | |
1798 | u32 *pdata = buf; | |
1799 | for (; cnt >= 4; cnt -= 4) | |
4e0a5adf | 1800 | mci_writel(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1801 | buf = pdata; |
1802 | } | |
1803 | /* put anything remaining in the part_buf */ | |
1804 | if (cnt) { | |
1805 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
1806 | /* Push data if we have reached the expected data length */ |
1807 | if ((data->bytes_xfered + init_cnt) == | |
1808 | (data->blksz * data->blocks)) | |
4e0a5adf | 1809 | mci_writel(host, DATA(host->data_offset), |
cfbeb59c | 1810 | host->part_buf32); |
f95f3850 WN |
1811 | } |
1812 | } | |
1813 | ||
1814 | static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) | |
1815 | { | |
34b664a2 JH |
1816 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
1817 | if (unlikely((unsigned long)buf & 0x3)) { | |
1818 | while (cnt >= 4) { | |
1819 | /* pull data from fifo into aligned buffer */ | |
1820 | u32 aligned_buf[32]; | |
1821 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
1822 | int items = len >> 2; | |
1823 | int i; | |
1824 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1825 | aligned_buf[i] = mci_readl(host, |
1826 | DATA(host->data_offset)); | |
34b664a2 JH |
1827 | /* memcpy from aligned buffer into output buffer */ |
1828 | memcpy(buf, aligned_buf, len); | |
1829 | buf += len; | |
1830 | cnt -= len; | |
1831 | } | |
1832 | } else | |
1833 | #endif | |
1834 | { | |
1835 | u32 *pdata = buf; | |
1836 | for (; cnt >= 4; cnt -= 4) | |
4e0a5adf | 1837 | *pdata++ = mci_readl(host, DATA(host->data_offset)); |
34b664a2 JH |
1838 | buf = pdata; |
1839 | } | |
1840 | if (cnt) { | |
4e0a5adf | 1841 | host->part_buf32 = mci_readl(host, DATA(host->data_offset)); |
34b664a2 | 1842 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
1843 | } |
1844 | } | |
1845 | ||
1846 | static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) | |
1847 | { | |
cfbeb59c MC |
1848 | struct mmc_data *data = host->data; |
1849 | int init_cnt = cnt; | |
1850 | ||
34b664a2 JH |
1851 | /* try and push anything in the part_buf */ |
1852 | if (unlikely(host->part_buf_count)) { | |
1853 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1854 | buf += len; | |
1855 | cnt -= len; | |
c09fbd74 | 1856 | |
cfbeb59c | 1857 | if (host->part_buf_count == 8) { |
c09fbd74 | 1858 | mci_writeq(host, DATA(host->data_offset), |
4e0a5adf | 1859 | host->part_buf); |
34b664a2 JH |
1860 | host->part_buf_count = 0; |
1861 | } | |
1862 | } | |
1863 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1864 | if (unlikely((unsigned long)buf & 0x7)) { | |
1865 | while (cnt >= 8) { | |
1866 | u64 aligned_buf[16]; | |
1867 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
1868 | int items = len >> 3; | |
1869 | int i; | |
1870 | /* memcpy from input buffer into aligned buffer */ | |
1871 | memcpy(aligned_buf, buf, len); | |
1872 | buf += len; | |
1873 | cnt -= len; | |
1874 | /* push data from aligned buffer into fifo */ | |
1875 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1876 | mci_writeq(host, DATA(host->data_offset), |
1877 | aligned_buf[i]); | |
34b664a2 JH |
1878 | } |
1879 | } else | |
1880 | #endif | |
1881 | { | |
1882 | u64 *pdata = buf; | |
1883 | for (; cnt >= 8; cnt -= 8) | |
4e0a5adf | 1884 | mci_writeq(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1885 | buf = pdata; |
1886 | } | |
1887 | /* put anything remaining in the part_buf */ | |
1888 | if (cnt) { | |
1889 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
1890 | /* Push data if we have reached the expected data length */ |
1891 | if ((data->bytes_xfered + init_cnt) == | |
1892 | (data->blksz * data->blocks)) | |
4e0a5adf | 1893 | mci_writeq(host, DATA(host->data_offset), |
cfbeb59c | 1894 | host->part_buf); |
f95f3850 WN |
1895 | } |
1896 | } | |
1897 | ||
1898 | static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) | |
1899 | { | |
34b664a2 JH |
1900 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
1901 | if (unlikely((unsigned long)buf & 0x7)) { | |
1902 | while (cnt >= 8) { | |
1903 | /* pull data from fifo into aligned buffer */ | |
1904 | u64 aligned_buf[16]; | |
1905 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
1906 | int items = len >> 3; | |
1907 | int i; | |
1908 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1909 | aligned_buf[i] = mci_readq(host, |
1910 | DATA(host->data_offset)); | |
34b664a2 JH |
1911 | /* memcpy from aligned buffer into output buffer */ |
1912 | memcpy(buf, aligned_buf, len); | |
1913 | buf += len; | |
1914 | cnt -= len; | |
1915 | } | |
1916 | } else | |
1917 | #endif | |
1918 | { | |
1919 | u64 *pdata = buf; | |
1920 | for (; cnt >= 8; cnt -= 8) | |
4e0a5adf | 1921 | *pdata++ = mci_readq(host, DATA(host->data_offset)); |
34b664a2 JH |
1922 | buf = pdata; |
1923 | } | |
1924 | if (cnt) { | |
4e0a5adf | 1925 | host->part_buf = mci_readq(host, DATA(host->data_offset)); |
34b664a2 JH |
1926 | dw_mci_pull_final_bytes(host, buf, cnt); |
1927 | } | |
1928 | } | |
f95f3850 | 1929 | |
34b664a2 JH |
1930 | static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) |
1931 | { | |
1932 | int len; | |
f95f3850 | 1933 | |
34b664a2 JH |
1934 | /* get remaining partial bytes */ |
1935 | len = dw_mci_pull_part_bytes(host, buf, cnt); | |
1936 | if (unlikely(len == cnt)) | |
1937 | return; | |
1938 | buf += len; | |
1939 | cnt -= len; | |
1940 | ||
1941 | /* get the rest of the data */ | |
1942 | host->pull_data(host, buf, cnt); | |
f95f3850 WN |
1943 | } |
1944 | ||
87a74d39 | 1945 | static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) |
f95f3850 | 1946 | { |
f9c2a0dc SJ |
1947 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
1948 | void *buf; | |
1949 | unsigned int offset; | |
f95f3850 WN |
1950 | struct mmc_data *data = host->data; |
1951 | int shift = host->data_shift; | |
1952 | u32 status; | |
3e4b0d8b | 1953 | unsigned int len; |
f9c2a0dc | 1954 | unsigned int remain, fcnt; |
f95f3850 WN |
1955 | |
1956 | do { | |
f9c2a0dc SJ |
1957 | if (!sg_miter_next(sg_miter)) |
1958 | goto done; | |
1959 | ||
4225fc85 | 1960 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
1961 | buf = sg_miter->addr; |
1962 | remain = sg_miter->length; | |
1963 | offset = 0; | |
1964 | ||
1965 | do { | |
1966 | fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) | |
1967 | << shift) + host->part_buf_count; | |
1968 | len = min(remain, fcnt); | |
1969 | if (!len) | |
1970 | break; | |
34b664a2 | 1971 | dw_mci_pull_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 1972 | data->bytes_xfered += len; |
f95f3850 | 1973 | offset += len; |
f9c2a0dc SJ |
1974 | remain -= len; |
1975 | } while (remain); | |
f95f3850 | 1976 | |
e74f3a9c | 1977 | sg_miter->consumed = offset; |
f95f3850 WN |
1978 | status = mci_readl(host, MINTSTS); |
1979 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
87a74d39 KK |
1980 | /* if the RXDR is ready read again */ |
1981 | } while ((status & SDMMC_INT_RXDR) || | |
1982 | (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); | |
f9c2a0dc SJ |
1983 | |
1984 | if (!remain) { | |
1985 | if (!sg_miter_next(sg_miter)) | |
1986 | goto done; | |
1987 | sg_miter->consumed = 0; | |
1988 | } | |
1989 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
1990 | return; |
1991 | ||
1992 | done: | |
f9c2a0dc SJ |
1993 | sg_miter_stop(sg_miter); |
1994 | host->sg = NULL; | |
f95f3850 WN |
1995 | smp_wmb(); |
1996 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
1997 | } | |
1998 | ||
1999 | static void dw_mci_write_data_pio(struct dw_mci *host) | |
2000 | { | |
f9c2a0dc SJ |
2001 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
2002 | void *buf; | |
2003 | unsigned int offset; | |
f95f3850 WN |
2004 | struct mmc_data *data = host->data; |
2005 | int shift = host->data_shift; | |
2006 | u32 status; | |
3e4b0d8b | 2007 | unsigned int len; |
f9c2a0dc SJ |
2008 | unsigned int fifo_depth = host->fifo_depth; |
2009 | unsigned int remain, fcnt; | |
f95f3850 WN |
2010 | |
2011 | do { | |
f9c2a0dc SJ |
2012 | if (!sg_miter_next(sg_miter)) |
2013 | goto done; | |
2014 | ||
4225fc85 | 2015 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
2016 | buf = sg_miter->addr; |
2017 | remain = sg_miter->length; | |
2018 | offset = 0; | |
2019 | ||
2020 | do { | |
2021 | fcnt = ((fifo_depth - | |
2022 | SDMMC_GET_FCNT(mci_readl(host, STATUS))) | |
2023 | << shift) - host->part_buf_count; | |
2024 | len = min(remain, fcnt); | |
2025 | if (!len) | |
2026 | break; | |
f95f3850 | 2027 | host->push_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 2028 | data->bytes_xfered += len; |
f95f3850 | 2029 | offset += len; |
f9c2a0dc SJ |
2030 | remain -= len; |
2031 | } while (remain); | |
f95f3850 | 2032 | |
e74f3a9c | 2033 | sg_miter->consumed = offset; |
f95f3850 WN |
2034 | status = mci_readl(host, MINTSTS); |
2035 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
f95f3850 | 2036 | } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ |
f9c2a0dc SJ |
2037 | |
2038 | if (!remain) { | |
2039 | if (!sg_miter_next(sg_miter)) | |
2040 | goto done; | |
2041 | sg_miter->consumed = 0; | |
2042 | } | |
2043 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
2044 | return; |
2045 | ||
2046 | done: | |
f9c2a0dc SJ |
2047 | sg_miter_stop(sg_miter); |
2048 | host->sg = NULL; | |
f95f3850 WN |
2049 | smp_wmb(); |
2050 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
2051 | } | |
2052 | ||
2053 | static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) | |
2054 | { | |
2055 | if (!host->cmd_status) | |
2056 | host->cmd_status = status; | |
2057 | ||
2058 | smp_wmb(); | |
2059 | ||
2060 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
2061 | tasklet_schedule(&host->tasklet); | |
2062 | } | |
2063 | ||
6130e7a9 DA |
2064 | static void dw_mci_handle_cd(struct dw_mci *host) |
2065 | { | |
2066 | int i; | |
2067 | ||
2068 | for (i = 0; i < host->num_slots; i++) { | |
2069 | struct dw_mci_slot *slot = host->slot[i]; | |
2070 | ||
2071 | if (!slot) | |
2072 | continue; | |
2073 | ||
2074 | if (slot->mmc->ops->card_event) | |
2075 | slot->mmc->ops->card_event(slot->mmc); | |
2076 | mmc_detect_change(slot->mmc, | |
2077 | msecs_to_jiffies(host->pdata->detect_delay_ms)); | |
2078 | } | |
2079 | } | |
2080 | ||
f95f3850 WN |
2081 | static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) |
2082 | { | |
2083 | struct dw_mci *host = dev_id; | |
182c9081 | 2084 | u32 pending; |
1a5c8e1f | 2085 | int i; |
f95f3850 | 2086 | |
1fb5f68a MC |
2087 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ |
2088 | ||
476d79f1 DA |
2089 | /* |
2090 | * DTO fix - version 2.10a and below, and only if internal DMA | |
2091 | * is configured. | |
2092 | */ | |
2093 | if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) { | |
2094 | if (!pending && | |
2095 | ((mci_readl(host, STATUS) >> 17) & 0x1fff)) | |
2096 | pending |= SDMMC_INT_DATA_OVER; | |
2097 | } | |
f95f3850 | 2098 | |
476d79f1 | 2099 | if (pending) { |
01730558 DA |
2100 | /* Check volt switch first, since it can look like an error */ |
2101 | if ((host->state == STATE_SENDING_CMD11) && | |
2102 | (pending & SDMMC_INT_VOLT_SWITCH)) { | |
2103 | mci_writel(host, RINTSTS, SDMMC_INT_VOLT_SWITCH); | |
2104 | pending &= ~SDMMC_INT_VOLT_SWITCH; | |
2105 | dw_mci_cmd_interrupt(host, pending); | |
2106 | } | |
2107 | ||
f95f3850 WN |
2108 | if (pending & DW_MCI_CMD_ERROR_FLAGS) { |
2109 | mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); | |
182c9081 | 2110 | host->cmd_status = pending; |
f95f3850 WN |
2111 | smp_wmb(); |
2112 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
f95f3850 WN |
2113 | } |
2114 | ||
2115 | if (pending & DW_MCI_DATA_ERROR_FLAGS) { | |
2116 | /* if there is an error report DATA_ERROR */ | |
2117 | mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); | |
182c9081 | 2118 | host->data_status = pending; |
f95f3850 WN |
2119 | smp_wmb(); |
2120 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
9b2026a1 | 2121 | tasklet_schedule(&host->tasklet); |
f95f3850 WN |
2122 | } |
2123 | ||
2124 | if (pending & SDMMC_INT_DATA_OVER) { | |
2125 | mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); | |
2126 | if (!host->data_status) | |
182c9081 | 2127 | host->data_status = pending; |
f95f3850 WN |
2128 | smp_wmb(); |
2129 | if (host->dir_status == DW_MCI_RECV_STATUS) { | |
2130 | if (host->sg != NULL) | |
87a74d39 | 2131 | dw_mci_read_data_pio(host, true); |
f95f3850 WN |
2132 | } |
2133 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
2134 | tasklet_schedule(&host->tasklet); | |
2135 | } | |
2136 | ||
2137 | if (pending & SDMMC_INT_RXDR) { | |
2138 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
b40af3aa | 2139 | if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) |
87a74d39 | 2140 | dw_mci_read_data_pio(host, false); |
f95f3850 WN |
2141 | } |
2142 | ||
2143 | if (pending & SDMMC_INT_TXDR) { | |
2144 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
b40af3aa | 2145 | if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) |
f95f3850 WN |
2146 | dw_mci_write_data_pio(host); |
2147 | } | |
2148 | ||
2149 | if (pending & SDMMC_INT_CMD_DONE) { | |
2150 | mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); | |
182c9081 | 2151 | dw_mci_cmd_interrupt(host, pending); |
f95f3850 WN |
2152 | } |
2153 | ||
2154 | if (pending & SDMMC_INT_CD) { | |
2155 | mci_writel(host, RINTSTS, SDMMC_INT_CD); | |
6130e7a9 | 2156 | dw_mci_handle_cd(host); |
f95f3850 WN |
2157 | } |
2158 | ||
1a5c8e1f SH |
2159 | /* Handle SDIO Interrupts */ |
2160 | for (i = 0; i < host->num_slots; i++) { | |
2161 | struct dw_mci_slot *slot = host->slot[i]; | |
76756234 AK |
2162 | if (pending & SDMMC_INT_SDIO(slot->sdio_id)) { |
2163 | mci_writel(host, RINTSTS, | |
2164 | SDMMC_INT_SDIO(slot->sdio_id)); | |
1a5c8e1f SH |
2165 | mmc_signal_sdio_irq(slot->mmc); |
2166 | } | |
2167 | } | |
2168 | ||
1fb5f68a | 2169 | } |
f95f3850 WN |
2170 | |
2171 | #ifdef CONFIG_MMC_DW_IDMAC | |
2172 | /* Handle DMA interrupts */ | |
69d99fdc PT |
2173 | if (host->dma_64bit_address == 1) { |
2174 | pending = mci_readl(host, IDSTS64); | |
2175 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2176 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_TI | | |
2177 | SDMMC_IDMAC_INT_RI); | |
2178 | mci_writel(host, IDSTS64, SDMMC_IDMAC_INT_NI); | |
2179 | host->dma_ops->complete(host); | |
2180 | } | |
2181 | } else { | |
2182 | pending = mci_readl(host, IDSTS); | |
2183 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
2184 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | | |
2185 | SDMMC_IDMAC_INT_RI); | |
2186 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); | |
2187 | host->dma_ops->complete(host); | |
2188 | } | |
f95f3850 WN |
2189 | } |
2190 | #endif | |
2191 | ||
2192 | return IRQ_HANDLED; | |
2193 | } | |
2194 | ||
c91eab4b TA |
2195 | #ifdef CONFIG_OF |
2196 | /* given a slot id, find out the device node representing that slot */ | |
2197 | static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) | |
2198 | { | |
2199 | struct device_node *np; | |
2200 | const __be32 *addr; | |
2201 | int len; | |
2202 | ||
2203 | if (!dev || !dev->of_node) | |
2204 | return NULL; | |
2205 | ||
2206 | for_each_child_of_node(dev->of_node, np) { | |
2207 | addr = of_get_property(np, "reg", &len); | |
2208 | if (!addr || (len < sizeof(int))) | |
2209 | continue; | |
2210 | if (be32_to_cpup(addr) == slot) | |
2211 | return np; | |
2212 | } | |
2213 | return NULL; | |
2214 | } | |
2215 | ||
a70aaa64 DA |
2216 | static struct dw_mci_of_slot_quirks { |
2217 | char *quirk; | |
2218 | int id; | |
2219 | } of_slot_quirks[] = { | |
2220 | { | |
2221 | .quirk = "disable-wp", | |
2222 | .id = DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT, | |
2223 | }, | |
2224 | }; | |
2225 | ||
2226 | static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) | |
2227 | { | |
2228 | struct device_node *np = dw_mci_of_find_slot_node(dev, slot); | |
2229 | int quirks = 0; | |
2230 | int idx; | |
2231 | ||
2232 | /* get quirks */ | |
2233 | for (idx = 0; idx < ARRAY_SIZE(of_slot_quirks); idx++) | |
26375b5c JC |
2234 | if (of_get_property(np, of_slot_quirks[idx].quirk, NULL)) { |
2235 | dev_warn(dev, "Slot quirk %s is deprecated\n", | |
2236 | of_slot_quirks[idx].quirk); | |
a70aaa64 | 2237 | quirks |= of_slot_quirks[idx].id; |
26375b5c | 2238 | } |
a70aaa64 DA |
2239 | |
2240 | return quirks; | |
2241 | } | |
c91eab4b | 2242 | #else /* CONFIG_OF */ |
a70aaa64 DA |
2243 | static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) |
2244 | { | |
2245 | return 0; | |
2246 | } | |
c91eab4b TA |
2247 | #endif /* CONFIG_OF */ |
2248 | ||
36c179a9 | 2249 | static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) |
f95f3850 WN |
2250 | { |
2251 | struct mmc_host *mmc; | |
2252 | struct dw_mci_slot *slot; | |
e95baf13 | 2253 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2254 | int ctrl_id, ret; |
1f44a2a5 | 2255 | u32 freq[2]; |
f95f3850 | 2256 | |
4a90920c | 2257 | mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); |
f95f3850 WN |
2258 | if (!mmc) |
2259 | return -ENOMEM; | |
2260 | ||
2261 | slot = mmc_priv(mmc); | |
2262 | slot->id = id; | |
76756234 | 2263 | slot->sdio_id = host->sdio_id0 + id; |
f95f3850 WN |
2264 | slot->mmc = mmc; |
2265 | slot->host = host; | |
c91eab4b | 2266 | host->slot[id] = slot; |
f95f3850 | 2267 | |
a70aaa64 DA |
2268 | slot->quirks = dw_mci_of_get_slot_quirks(host->dev, slot->id); |
2269 | ||
f95f3850 | 2270 | mmc->ops = &dw_mci_ops; |
1f44a2a5 SJ |
2271 | if (of_property_read_u32_array(host->dev->of_node, |
2272 | "clock-freq-min-max", freq, 2)) { | |
2273 | mmc->f_min = DW_MCI_FREQ_MIN; | |
2274 | mmc->f_max = DW_MCI_FREQ_MAX; | |
2275 | } else { | |
2276 | mmc->f_min = freq[0]; | |
2277 | mmc->f_max = freq[1]; | |
2278 | } | |
f95f3850 | 2279 | |
51da2240 YC |
2280 | /*if there are external regulators, get them*/ |
2281 | ret = mmc_regulator_get_supply(mmc); | |
2282 | if (ret == -EPROBE_DEFER) | |
3cf890fc | 2283 | goto err_host_allocated; |
51da2240 YC |
2284 | |
2285 | if (!mmc->ocr_avail) | |
2286 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
f95f3850 | 2287 | |
fc3d7720 JC |
2288 | if (host->pdata->caps) |
2289 | mmc->caps = host->pdata->caps; | |
fc3d7720 | 2290 | |
ab269128 AK |
2291 | if (host->pdata->pm_caps) |
2292 | mmc->pm_caps = host->pdata->pm_caps; | |
2293 | ||
800d78bf TA |
2294 | if (host->dev->of_node) { |
2295 | ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); | |
2296 | if (ctrl_id < 0) | |
2297 | ctrl_id = 0; | |
2298 | } else { | |
2299 | ctrl_id = to_platform_device(host->dev)->id; | |
2300 | } | |
cb27a843 JH |
2301 | if (drv_data && drv_data->caps) |
2302 | mmc->caps |= drv_data->caps[ctrl_id]; | |
800d78bf | 2303 | |
4f408cc6 SJ |
2304 | if (host->pdata->caps2) |
2305 | mmc->caps2 = host->pdata->caps2; | |
4f408cc6 | 2306 | |
3cf890fc DA |
2307 | ret = mmc_of_parse(mmc); |
2308 | if (ret) | |
2309 | goto err_host_allocated; | |
f95f3850 | 2310 | |
f95f3850 WN |
2311 | if (host->pdata->blk_settings) { |
2312 | mmc->max_segs = host->pdata->blk_settings->max_segs; | |
2313 | mmc->max_blk_size = host->pdata->blk_settings->max_blk_size; | |
2314 | mmc->max_blk_count = host->pdata->blk_settings->max_blk_count; | |
2315 | mmc->max_req_size = host->pdata->blk_settings->max_req_size; | |
2316 | mmc->max_seg_size = host->pdata->blk_settings->max_seg_size; | |
2317 | } else { | |
2318 | /* Useful defaults if platform data is unset. */ | |
a39e5746 JC |
2319 | #ifdef CONFIG_MMC_DW_IDMAC |
2320 | mmc->max_segs = host->ring_size; | |
2321 | mmc->max_blk_size = 65536; | |
2322 | mmc->max_blk_count = host->ring_size; | |
2323 | mmc->max_seg_size = 0x1000; | |
2324 | mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; | |
2325 | #else | |
f95f3850 WN |
2326 | mmc->max_segs = 64; |
2327 | mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ | |
2328 | mmc->max_blk_count = 512; | |
2329 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
2330 | mmc->max_seg_size = mmc->max_req_size; | |
f95f3850 | 2331 | #endif /* CONFIG_MMC_DW_IDMAC */ |
a39e5746 | 2332 | } |
f95f3850 | 2333 | |
ae0eb348 JC |
2334 | if (dw_mci_get_cd(mmc)) |
2335 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
2336 | else | |
2337 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
2338 | ||
0cea529d JC |
2339 | ret = mmc_add_host(mmc); |
2340 | if (ret) | |
3cf890fc | 2341 | goto err_host_allocated; |
f95f3850 WN |
2342 | |
2343 | #if defined(CONFIG_DEBUG_FS) | |
2344 | dw_mci_init_debugfs(slot); | |
2345 | #endif | |
2346 | ||
f95f3850 | 2347 | return 0; |
800d78bf | 2348 | |
3cf890fc | 2349 | err_host_allocated: |
800d78bf | 2350 | mmc_free_host(mmc); |
51da2240 | 2351 | return ret; |
f95f3850 WN |
2352 | } |
2353 | ||
2354 | static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) | |
2355 | { | |
f95f3850 WN |
2356 | /* Debugfs stuff is cleaned up by mmc core */ |
2357 | mmc_remove_host(slot->mmc); | |
2358 | slot->host->slot[id] = NULL; | |
2359 | mmc_free_host(slot->mmc); | |
2360 | } | |
2361 | ||
2362 | static void dw_mci_init_dma(struct dw_mci *host) | |
2363 | { | |
69d99fdc PT |
2364 | int addr_config; |
2365 | /* Check ADDR_CONFIG bit in HCON to find IDMAC address bus width */ | |
2366 | addr_config = (mci_readl(host, HCON) >> 27) & 0x01; | |
2367 | ||
2368 | if (addr_config == 1) { | |
2369 | /* host supports IDMAC in 64-bit address mode */ | |
2370 | host->dma_64bit_address = 1; | |
2371 | dev_info(host->dev, "IDMAC supports 64-bit address mode.\n"); | |
2372 | if (!dma_set_mask(host->dev, DMA_BIT_MASK(64))) | |
2373 | dma_set_coherent_mask(host->dev, DMA_BIT_MASK(64)); | |
2374 | } else { | |
2375 | /* host supports IDMAC in 32-bit address mode */ | |
2376 | host->dma_64bit_address = 0; | |
2377 | dev_info(host->dev, "IDMAC supports 32-bit address mode.\n"); | |
2378 | } | |
2379 | ||
f95f3850 | 2380 | /* Alloc memory for sg translation */ |
780f22af | 2381 | host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE, |
f95f3850 WN |
2382 | &host->sg_dma, GFP_KERNEL); |
2383 | if (!host->sg_cpu) { | |
4a90920c | 2384 | dev_err(host->dev, "%s: could not alloc DMA memory\n", |
f95f3850 WN |
2385 | __func__); |
2386 | goto no_dma; | |
2387 | } | |
2388 | ||
2389 | /* Determine which DMA interface to use */ | |
2390 | #ifdef CONFIG_MMC_DW_IDMAC | |
2391 | host->dma_ops = &dw_mci_idmac_ops; | |
00956ea3 | 2392 | dev_info(host->dev, "Using internal DMA controller.\n"); |
f95f3850 WN |
2393 | #endif |
2394 | ||
2395 | if (!host->dma_ops) | |
2396 | goto no_dma; | |
2397 | ||
e1631f98 JC |
2398 | if (host->dma_ops->init && host->dma_ops->start && |
2399 | host->dma_ops->stop && host->dma_ops->cleanup) { | |
f95f3850 | 2400 | if (host->dma_ops->init(host)) { |
4a90920c | 2401 | dev_err(host->dev, "%s: Unable to initialize " |
f95f3850 WN |
2402 | "DMA Controller.\n", __func__); |
2403 | goto no_dma; | |
2404 | } | |
2405 | } else { | |
4a90920c | 2406 | dev_err(host->dev, "DMA initialization not found.\n"); |
f95f3850 WN |
2407 | goto no_dma; |
2408 | } | |
2409 | ||
2410 | host->use_dma = 1; | |
2411 | return; | |
2412 | ||
2413 | no_dma: | |
4a90920c | 2414 | dev_info(host->dev, "Using PIO mode.\n"); |
f95f3850 WN |
2415 | host->use_dma = 0; |
2416 | return; | |
2417 | } | |
2418 | ||
31bff450 | 2419 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) |
f95f3850 WN |
2420 | { |
2421 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
31bff450 | 2422 | u32 ctrl; |
f95f3850 | 2423 | |
31bff450 SJ |
2424 | ctrl = mci_readl(host, CTRL); |
2425 | ctrl |= reset; | |
2426 | mci_writel(host, CTRL, ctrl); | |
f95f3850 WN |
2427 | |
2428 | /* wait till resets clear */ | |
2429 | do { | |
2430 | ctrl = mci_readl(host, CTRL); | |
31bff450 | 2431 | if (!(ctrl & reset)) |
f95f3850 WN |
2432 | return true; |
2433 | } while (time_before(jiffies, timeout)); | |
2434 | ||
31bff450 SJ |
2435 | dev_err(host->dev, |
2436 | "Timeout resetting block (ctrl reset %#x)\n", | |
2437 | ctrl & reset); | |
f95f3850 WN |
2438 | |
2439 | return false; | |
2440 | } | |
2441 | ||
3a33a94c | 2442 | static bool dw_mci_reset(struct dw_mci *host) |
31bff450 | 2443 | { |
3a33a94c SR |
2444 | u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; |
2445 | bool ret = false; | |
2446 | ||
31bff450 SJ |
2447 | /* |
2448 | * Reseting generates a block interrupt, hence setting | |
2449 | * the scatter-gather pointer to NULL. | |
2450 | */ | |
2451 | if (host->sg) { | |
2452 | sg_miter_stop(&host->sg_miter); | |
2453 | host->sg = NULL; | |
2454 | } | |
2455 | ||
3a33a94c SR |
2456 | if (host->use_dma) |
2457 | flags |= SDMMC_CTRL_DMA_RESET; | |
31bff450 | 2458 | |
3a33a94c SR |
2459 | if (dw_mci_ctrl_reset(host, flags)) { |
2460 | /* | |
2461 | * In all cases we clear the RAWINTS register to clear any | |
2462 | * interrupts. | |
2463 | */ | |
2464 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2465 | ||
2466 | /* if using dma we wait for dma_req to clear */ | |
2467 | if (host->use_dma) { | |
2468 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
2469 | u32 status; | |
2470 | do { | |
2471 | status = mci_readl(host, STATUS); | |
2472 | if (!(status & SDMMC_STATUS_DMA_REQ)) | |
2473 | break; | |
2474 | cpu_relax(); | |
2475 | } while (time_before(jiffies, timeout)); | |
2476 | ||
2477 | if (status & SDMMC_STATUS_DMA_REQ) { | |
2478 | dev_err(host->dev, | |
2479 | "%s: Timeout waiting for dma_req to " | |
2480 | "clear during reset\n", __func__); | |
2481 | goto ciu_out; | |
2482 | } | |
2483 | ||
2484 | /* when using DMA next we reset the fifo again */ | |
2485 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) | |
2486 | goto ciu_out; | |
2487 | } | |
2488 | } else { | |
2489 | /* if the controller reset bit did clear, then set clock regs */ | |
2490 | if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { | |
2491 | dev_err(host->dev, "%s: fifo/dma reset bits didn't " | |
2492 | "clear but ciu was reset, doing clock update\n", | |
2493 | __func__); | |
2494 | goto ciu_out; | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | #if IS_ENABLED(CONFIG_MMC_DW_IDMAC) | |
2499 | /* It is also recommended that we reset and reprogram idmac */ | |
2500 | dw_mci_idmac_reset(host); | |
2501 | #endif | |
2502 | ||
2503 | ret = true; | |
2504 | ||
2505 | ciu_out: | |
2506 | /* After a CTRL reset we need to have CIU set clock registers */ | |
2507 | mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0); | |
2508 | ||
2509 | return ret; | |
31bff450 SJ |
2510 | } |
2511 | ||
c91eab4b TA |
2512 | #ifdef CONFIG_OF |
2513 | static struct dw_mci_of_quirks { | |
2514 | char *quirk; | |
2515 | int id; | |
2516 | } of_quirks[] = { | |
2517 | { | |
c91eab4b TA |
2518 | .quirk = "broken-cd", |
2519 | .id = DW_MCI_QUIRK_BROKEN_CARD_DETECTION, | |
26375b5c JC |
2520 | }, { |
2521 | .quirk = "disable-wp", | |
2522 | .id = DW_MCI_QUIRK_NO_WRITE_PROTECT, | |
c91eab4b TA |
2523 | }, |
2524 | }; | |
2525 | ||
2526 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
2527 | { | |
2528 | struct dw_mci_board *pdata; | |
2529 | struct device *dev = host->dev; | |
2530 | struct device_node *np = dev->of_node; | |
e95baf13 | 2531 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2532 | int idx, ret; |
3c6d89ea | 2533 | u32 clock_frequency; |
c91eab4b TA |
2534 | |
2535 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
2536 | if (!pdata) { | |
2537 | dev_err(dev, "could not allocate memory for pdata\n"); | |
2538 | return ERR_PTR(-ENOMEM); | |
2539 | } | |
2540 | ||
2541 | /* find out number of slots supported */ | |
2542 | if (of_property_read_u32(dev->of_node, "num-slots", | |
2543 | &pdata->num_slots)) { | |
2544 | dev_info(dev, "num-slots property not found, " | |
2545 | "assuming 1 slot is available\n"); | |
2546 | pdata->num_slots = 1; | |
2547 | } | |
2548 | ||
2549 | /* get quirks */ | |
2550 | for (idx = 0; idx < ARRAY_SIZE(of_quirks); idx++) | |
2551 | if (of_get_property(np, of_quirks[idx].quirk, NULL)) | |
2552 | pdata->quirks |= of_quirks[idx].id; | |
2553 | ||
2554 | if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth)) | |
2555 | dev_info(dev, "fifo-depth property not found, using " | |
2556 | "value of FIFOTH register as default\n"); | |
2557 | ||
2558 | of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); | |
2559 | ||
3c6d89ea DA |
2560 | if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) |
2561 | pdata->bus_hz = clock_frequency; | |
2562 | ||
cb27a843 JH |
2563 | if (drv_data && drv_data->parse_dt) { |
2564 | ret = drv_data->parse_dt(host); | |
800d78bf TA |
2565 | if (ret) |
2566 | return ERR_PTR(ret); | |
2567 | } | |
2568 | ||
10b49841 SJ |
2569 | if (of_find_property(np, "supports-highspeed", NULL)) |
2570 | pdata->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; | |
2571 | ||
c91eab4b TA |
2572 | return pdata; |
2573 | } | |
2574 | ||
2575 | #else /* CONFIG_OF */ | |
2576 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
2577 | { | |
2578 | return ERR_PTR(-EINVAL); | |
2579 | } | |
2580 | #endif /* CONFIG_OF */ | |
2581 | ||
62ca8034 | 2582 | int dw_mci_probe(struct dw_mci *host) |
f95f3850 | 2583 | { |
e95baf13 | 2584 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
62ca8034 | 2585 | int width, i, ret = 0; |
f95f3850 | 2586 | u32 fifo_size; |
1c2215b7 | 2587 | int init_slots = 0; |
f95f3850 | 2588 | |
c91eab4b TA |
2589 | if (!host->pdata) { |
2590 | host->pdata = dw_mci_parse_dt(host); | |
2591 | if (IS_ERR(host->pdata)) { | |
2592 | dev_err(host->dev, "platform data not available\n"); | |
2593 | return -EINVAL; | |
2594 | } | |
f95f3850 WN |
2595 | } |
2596 | ||
907abd51 | 2597 | if (host->pdata->num_slots > 1) { |
4a90920c | 2598 | dev_err(host->dev, |
907abd51 | 2599 | "Platform data must supply num_slots.\n"); |
62ca8034 | 2600 | return -ENODEV; |
f95f3850 WN |
2601 | } |
2602 | ||
780f22af | 2603 | host->biu_clk = devm_clk_get(host->dev, "biu"); |
f90a0612 TA |
2604 | if (IS_ERR(host->biu_clk)) { |
2605 | dev_dbg(host->dev, "biu clock not available\n"); | |
2606 | } else { | |
2607 | ret = clk_prepare_enable(host->biu_clk); | |
2608 | if (ret) { | |
2609 | dev_err(host->dev, "failed to enable biu clock\n"); | |
f90a0612 TA |
2610 | return ret; |
2611 | } | |
2612 | } | |
2613 | ||
780f22af | 2614 | host->ciu_clk = devm_clk_get(host->dev, "ciu"); |
f90a0612 TA |
2615 | if (IS_ERR(host->ciu_clk)) { |
2616 | dev_dbg(host->dev, "ciu clock not available\n"); | |
3c6d89ea | 2617 | host->bus_hz = host->pdata->bus_hz; |
f90a0612 TA |
2618 | } else { |
2619 | ret = clk_prepare_enable(host->ciu_clk); | |
2620 | if (ret) { | |
2621 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
f90a0612 TA |
2622 | goto err_clk_biu; |
2623 | } | |
f90a0612 | 2624 | |
3c6d89ea DA |
2625 | if (host->pdata->bus_hz) { |
2626 | ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); | |
2627 | if (ret) | |
2628 | dev_warn(host->dev, | |
612de4c1 | 2629 | "Unable to set bus rate to %uHz\n", |
3c6d89ea DA |
2630 | host->pdata->bus_hz); |
2631 | } | |
f90a0612 | 2632 | host->bus_hz = clk_get_rate(host->ciu_clk); |
3c6d89ea | 2633 | } |
f90a0612 | 2634 | |
612de4c1 JC |
2635 | if (!host->bus_hz) { |
2636 | dev_err(host->dev, | |
2637 | "Platform data must supply bus speed\n"); | |
2638 | ret = -ENODEV; | |
2639 | goto err_clk_ciu; | |
2640 | } | |
2641 | ||
002f0d5c YK |
2642 | if (drv_data && drv_data->init) { |
2643 | ret = drv_data->init(host); | |
2644 | if (ret) { | |
2645 | dev_err(host->dev, | |
2646 | "implementation specific init failed\n"); | |
2647 | goto err_clk_ciu; | |
2648 | } | |
2649 | } | |
2650 | ||
cb27a843 JH |
2651 | if (drv_data && drv_data->setup_clock) { |
2652 | ret = drv_data->setup_clock(host); | |
800d78bf TA |
2653 | if (ret) { |
2654 | dev_err(host->dev, | |
2655 | "implementation specific clock setup failed\n"); | |
2656 | goto err_clk_ciu; | |
2657 | } | |
2658 | } | |
2659 | ||
62ca8034 | 2660 | host->quirks = host->pdata->quirks; |
f95f3850 WN |
2661 | |
2662 | spin_lock_init(&host->lock); | |
2663 | INIT_LIST_HEAD(&host->queue); | |
2664 | ||
f95f3850 WN |
2665 | /* |
2666 | * Get the host data width - this assumes that HCON has been set with | |
2667 | * the correct values. | |
2668 | */ | |
2669 | i = (mci_readl(host, HCON) >> 7) & 0x7; | |
2670 | if (!i) { | |
2671 | host->push_data = dw_mci_push_data16; | |
2672 | host->pull_data = dw_mci_pull_data16; | |
2673 | width = 16; | |
2674 | host->data_shift = 1; | |
2675 | } else if (i == 2) { | |
2676 | host->push_data = dw_mci_push_data64; | |
2677 | host->pull_data = dw_mci_pull_data64; | |
2678 | width = 64; | |
2679 | host->data_shift = 3; | |
2680 | } else { | |
2681 | /* Check for a reserved value, and warn if it is */ | |
2682 | WARN((i != 1), | |
2683 | "HCON reports a reserved host data width!\n" | |
2684 | "Defaulting to 32-bit access.\n"); | |
2685 | host->push_data = dw_mci_push_data32; | |
2686 | host->pull_data = dw_mci_pull_data32; | |
2687 | width = 32; | |
2688 | host->data_shift = 2; | |
2689 | } | |
2690 | ||
2691 | /* Reset all blocks */ | |
3a33a94c | 2692 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) |
141a712a SJ |
2693 | return -ENODEV; |
2694 | ||
2695 | host->dma_ops = host->pdata->dma_ops; | |
2696 | dw_mci_init_dma(host); | |
f95f3850 WN |
2697 | |
2698 | /* Clear the interrupts for the host controller */ | |
2699 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2700 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
2701 | ||
2702 | /* Put in max timeout */ | |
2703 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
2704 | ||
2705 | /* | |
2706 | * FIFO threshold settings RxMark = fifo_size / 2 - 1, | |
2707 | * Tx Mark = fifo_size / 2 DMA Size = 8 | |
2708 | */ | |
b86d8253 JH |
2709 | if (!host->pdata->fifo_depth) { |
2710 | /* | |
2711 | * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may | |
2712 | * have been overwritten by the bootloader, just like we're | |
2713 | * about to do, so if you know the value for your hardware, you | |
2714 | * should put it in the platform data. | |
2715 | */ | |
2716 | fifo_size = mci_readl(host, FIFOTH); | |
8234e869 | 2717 | fifo_size = 1 + ((fifo_size >> 16) & 0xfff); |
b86d8253 JH |
2718 | } else { |
2719 | fifo_size = host->pdata->fifo_depth; | |
2720 | } | |
2721 | host->fifo_depth = fifo_size; | |
52426899 SJ |
2722 | host->fifoth_val = |
2723 | SDMMC_SET_FIFOTH(0x2, fifo_size / 2 - 1, fifo_size / 2); | |
e61cf118 | 2724 | mci_writel(host, FIFOTH, host->fifoth_val); |
f95f3850 WN |
2725 | |
2726 | /* disable clock to CIU */ | |
2727 | mci_writel(host, CLKENA, 0); | |
2728 | mci_writel(host, CLKSRC, 0); | |
2729 | ||
63008768 JH |
2730 | /* |
2731 | * In 2.40a spec, Data offset is changed. | |
2732 | * Need to check the version-id and set data-offset for DATA register. | |
2733 | */ | |
2734 | host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); | |
2735 | dev_info(host->dev, "Version ID is %04x\n", host->verid); | |
2736 | ||
2737 | if (host->verid < DW_MMC_240A) | |
2738 | host->data_offset = DATA_OFFSET; | |
2739 | else | |
2740 | host->data_offset = DATA_240A_OFFSET; | |
2741 | ||
f95f3850 | 2742 | tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); |
780f22af SJ |
2743 | ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, |
2744 | host->irq_flags, "dw-mci", host); | |
f95f3850 | 2745 | if (ret) |
6130e7a9 | 2746 | goto err_dmaunmap; |
f95f3850 | 2747 | |
f95f3850 WN |
2748 | if (host->pdata->num_slots) |
2749 | host->num_slots = host->pdata->num_slots; | |
2750 | else | |
2751 | host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1; | |
2752 | ||
2da1d7f2 YC |
2753 | /* |
2754 | * Enable interrupts for command done, data over, data empty, card det, | |
2755 | * receive ready and error such as transmit, receive timeout, crc error | |
2756 | */ | |
2757 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2758 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
2759 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
2760 | DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); | |
2761 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */ | |
2762 | ||
2763 | dev_info(host->dev, "DW MMC controller at irq %d, " | |
2764 | "%d bit host data width, " | |
2765 | "%u deep fifo\n", | |
2766 | host->irq, width, fifo_size); | |
2767 | ||
f95f3850 WN |
2768 | /* We need at least one slot to succeed */ |
2769 | for (i = 0; i < host->num_slots; i++) { | |
2770 | ret = dw_mci_init_slot(host, i); | |
1c2215b7 TA |
2771 | if (ret) |
2772 | dev_dbg(host->dev, "slot %d init failed\n", i); | |
2773 | else | |
2774 | init_slots++; | |
2775 | } | |
2776 | ||
2777 | if (init_slots) { | |
2778 | dev_info(host->dev, "%d slots initialized\n", init_slots); | |
2779 | } else { | |
2780 | dev_dbg(host->dev, "attempted to initialize %d slots, " | |
2781 | "but failed on all\n", host->num_slots); | |
6130e7a9 | 2782 | goto err_dmaunmap; |
f95f3850 WN |
2783 | } |
2784 | ||
f95f3850 | 2785 | if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) |
4a90920c | 2786 | dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n"); |
f95f3850 WN |
2787 | |
2788 | return 0; | |
2789 | ||
f95f3850 WN |
2790 | err_dmaunmap: |
2791 | if (host->use_dma && host->dma_ops->exit) | |
2792 | host->dma_ops->exit(host); | |
f90a0612 TA |
2793 | |
2794 | err_clk_ciu: | |
780f22af | 2795 | if (!IS_ERR(host->ciu_clk)) |
f90a0612 | 2796 | clk_disable_unprepare(host->ciu_clk); |
780f22af | 2797 | |
f90a0612 | 2798 | err_clk_biu: |
780f22af | 2799 | if (!IS_ERR(host->biu_clk)) |
f90a0612 | 2800 | clk_disable_unprepare(host->biu_clk); |
780f22af | 2801 | |
f95f3850 WN |
2802 | return ret; |
2803 | } | |
62ca8034 | 2804 | EXPORT_SYMBOL(dw_mci_probe); |
f95f3850 | 2805 | |
62ca8034 | 2806 | void dw_mci_remove(struct dw_mci *host) |
f95f3850 | 2807 | { |
f95f3850 WN |
2808 | int i; |
2809 | ||
2810 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2811 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
2812 | ||
f95f3850 | 2813 | for (i = 0; i < host->num_slots; i++) { |
4a90920c | 2814 | dev_dbg(host->dev, "remove slot %d\n", i); |
f95f3850 WN |
2815 | if (host->slot[i]) |
2816 | dw_mci_cleanup_slot(host->slot[i], i); | |
2817 | } | |
2818 | ||
2819 | /* disable clock to CIU */ | |
2820 | mci_writel(host, CLKENA, 0); | |
2821 | mci_writel(host, CLKSRC, 0); | |
2822 | ||
f95f3850 WN |
2823 | if (host->use_dma && host->dma_ops->exit) |
2824 | host->dma_ops->exit(host); | |
2825 | ||
f90a0612 TA |
2826 | if (!IS_ERR(host->ciu_clk)) |
2827 | clk_disable_unprepare(host->ciu_clk); | |
780f22af | 2828 | |
f90a0612 TA |
2829 | if (!IS_ERR(host->biu_clk)) |
2830 | clk_disable_unprepare(host->biu_clk); | |
f95f3850 | 2831 | } |
62ca8034 SH |
2832 | EXPORT_SYMBOL(dw_mci_remove); |
2833 | ||
2834 | ||
f95f3850 | 2835 | |
6fe8890d | 2836 | #ifdef CONFIG_PM_SLEEP |
f95f3850 WN |
2837 | /* |
2838 | * TODO: we should probably disable the clock to the card in the suspend path. | |
2839 | */ | |
62ca8034 | 2840 | int dw_mci_suspend(struct dw_mci *host) |
f95f3850 | 2841 | { |
f95f3850 WN |
2842 | return 0; |
2843 | } | |
62ca8034 | 2844 | EXPORT_SYMBOL(dw_mci_suspend); |
f95f3850 | 2845 | |
62ca8034 | 2846 | int dw_mci_resume(struct dw_mci *host) |
f95f3850 WN |
2847 | { |
2848 | int i, ret; | |
f95f3850 | 2849 | |
3a33a94c | 2850 | if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { |
e61cf118 JC |
2851 | ret = -ENODEV; |
2852 | return ret; | |
2853 | } | |
2854 | ||
3bfe619d | 2855 | if (host->use_dma && host->dma_ops->init) |
141a712a SJ |
2856 | host->dma_ops->init(host); |
2857 | ||
52426899 SJ |
2858 | /* |
2859 | * Restore the initial value at FIFOTH register | |
2860 | * And Invalidate the prev_blksz with zero | |
2861 | */ | |
e61cf118 | 2862 | mci_writel(host, FIFOTH, host->fifoth_val); |
52426899 | 2863 | host->prev_blksz = 0; |
e61cf118 | 2864 | |
2eb2944f DA |
2865 | /* Put in max timeout */ |
2866 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
2867 | ||
e61cf118 JC |
2868 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
2869 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
2870 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
2871 | DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); | |
2872 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); | |
2873 | ||
f95f3850 WN |
2874 | for (i = 0; i < host->num_slots; i++) { |
2875 | struct dw_mci_slot *slot = host->slot[i]; | |
2876 | if (!slot) | |
2877 | continue; | |
ab269128 AK |
2878 | if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { |
2879 | dw_mci_set_ios(slot->mmc, &slot->mmc->ios); | |
2880 | dw_mci_setup_bus(slot, true); | |
2881 | } | |
f95f3850 | 2882 | } |
f95f3850 WN |
2883 | return 0; |
2884 | } | |
62ca8034 | 2885 | EXPORT_SYMBOL(dw_mci_resume); |
6fe8890d JC |
2886 | #endif /* CONFIG_PM_SLEEP */ |
2887 | ||
f95f3850 WN |
2888 | static int __init dw_mci_init(void) |
2889 | { | |
8e1c4e4d | 2890 | pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); |
62ca8034 | 2891 | return 0; |
f95f3850 WN |
2892 | } |
2893 | ||
2894 | static void __exit dw_mci_exit(void) | |
2895 | { | |
f95f3850 WN |
2896 | } |
2897 | ||
2898 | module_init(dw_mci_init); | |
2899 | module_exit(dw_mci_exit); | |
2900 | ||
2901 | MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); | |
2902 | MODULE_AUTHOR("NXP Semiconductor VietNam"); | |
2903 | MODULE_AUTHOR("Imagination Technologies Ltd"); | |
2904 | MODULE_LICENSE("GPL v2"); |