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Commit | Line | Data |
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f95f3850 WN |
1 | /* |
2 | * Synopsys DesignWare Multimedia Card Interface driver | |
3 | * (Based on NXP driver for lpc 31xx) | |
4 | * | |
5 | * Copyright (C) 2009 NXP Semiconductors | |
6 | * Copyright (C) 2009, 2010 Imagination Technologies Ltd. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/blkdev.h> | |
15 | #include <linux/clk.h> | |
16 | #include <linux/debugfs.h> | |
17 | #include <linux/device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/err.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/interrupt.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/platform_device.h> | |
f95f3850 WN |
25 | #include <linux/seq_file.h> |
26 | #include <linux/slab.h> | |
27 | #include <linux/stat.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/irq.h> | |
30 | #include <linux/mmc/host.h> | |
31 | #include <linux/mmc/mmc.h> | |
90c2143a | 32 | #include <linux/mmc/sdio.h> |
f95f3850 WN |
33 | #include <linux/mmc/dw_mmc.h> |
34 | #include <linux/bitops.h> | |
c07946a3 | 35 | #include <linux/regulator/consumer.h> |
1791b13e | 36 | #include <linux/workqueue.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 | ||
f95f3850 WN |
64 | struct idmac_desc { |
65 | u32 des0; /* Control Descriptor */ | |
66 | #define IDMAC_DES0_DIC BIT(1) | |
67 | #define IDMAC_DES0_LD BIT(2) | |
68 | #define IDMAC_DES0_FD BIT(3) | |
69 | #define IDMAC_DES0_CH BIT(4) | |
70 | #define IDMAC_DES0_ER BIT(5) | |
71 | #define IDMAC_DES0_CES BIT(30) | |
72 | #define IDMAC_DES0_OWN BIT(31) | |
73 | ||
74 | u32 des1; /* Buffer sizes */ | |
75 | #define IDMAC_SET_BUFFER1_SIZE(d, s) \ | |
9b7bbe10 | 76 | ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff)) |
f95f3850 WN |
77 | |
78 | u32 des2; /* buffer 1 physical address */ | |
79 | ||
80 | u32 des3; /* buffer 2 physical address */ | |
81 | }; | |
82 | #endif /* CONFIG_MMC_DW_IDMAC */ | |
83 | ||
0976f16d SJ |
84 | static const u8 tuning_blk_pattern_4bit[] = { |
85 | 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc, | |
86 | 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef, | |
87 | 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb, | |
88 | 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef, | |
89 | 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c, | |
90 | 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee, | |
91 | 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff, | |
92 | 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde, | |
93 | }; | |
f95f3850 | 94 | |
0976f16d SJ |
95 | static const u8 tuning_blk_pattern_8bit[] = { |
96 | 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, | |
97 | 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc, | |
98 | 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, | |
99 | 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, | |
100 | 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, | |
101 | 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, | |
102 | 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, | |
103 | 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, | |
104 | 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, | |
105 | 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, | |
106 | 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, | |
107 | 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, | |
108 | 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, | |
109 | 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, | |
110 | 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, | |
111 | 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, | |
f95f3850 WN |
112 | }; |
113 | ||
31bff450 SJ |
114 | static inline bool dw_mci_fifo_reset(struct dw_mci *host); |
115 | static inline bool dw_mci_ctrl_all_reset(struct dw_mci *host); | |
116 | ||
f95f3850 WN |
117 | #if defined(CONFIG_DEBUG_FS) |
118 | static int dw_mci_req_show(struct seq_file *s, void *v) | |
119 | { | |
120 | struct dw_mci_slot *slot = s->private; | |
121 | struct mmc_request *mrq; | |
122 | struct mmc_command *cmd; | |
123 | struct mmc_command *stop; | |
124 | struct mmc_data *data; | |
125 | ||
126 | /* Make sure we get a consistent snapshot */ | |
127 | spin_lock_bh(&slot->host->lock); | |
128 | mrq = slot->mrq; | |
129 | ||
130 | if (mrq) { | |
131 | cmd = mrq->cmd; | |
132 | data = mrq->data; | |
133 | stop = mrq->stop; | |
134 | ||
135 | if (cmd) | |
136 | seq_printf(s, | |
137 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
138 | cmd->opcode, cmd->arg, cmd->flags, | |
139 | cmd->resp[0], cmd->resp[1], cmd->resp[2], | |
140 | cmd->resp[2], cmd->error); | |
141 | if (data) | |
142 | seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", | |
143 | data->bytes_xfered, data->blocks, | |
144 | data->blksz, data->flags, data->error); | |
145 | if (stop) | |
146 | seq_printf(s, | |
147 | "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", | |
148 | stop->opcode, stop->arg, stop->flags, | |
149 | stop->resp[0], stop->resp[1], stop->resp[2], | |
150 | stop->resp[2], stop->error); | |
151 | } | |
152 | ||
153 | spin_unlock_bh(&slot->host->lock); | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
158 | static int dw_mci_req_open(struct inode *inode, struct file *file) | |
159 | { | |
160 | return single_open(file, dw_mci_req_show, inode->i_private); | |
161 | } | |
162 | ||
163 | static const struct file_operations dw_mci_req_fops = { | |
164 | .owner = THIS_MODULE, | |
165 | .open = dw_mci_req_open, | |
166 | .read = seq_read, | |
167 | .llseek = seq_lseek, | |
168 | .release = single_release, | |
169 | }; | |
170 | ||
171 | static int dw_mci_regs_show(struct seq_file *s, void *v) | |
172 | { | |
173 | seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); | |
174 | seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); | |
175 | seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); | |
176 | seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); | |
177 | seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); | |
178 | seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | static int dw_mci_regs_open(struct inode *inode, struct file *file) | |
184 | { | |
185 | return single_open(file, dw_mci_regs_show, inode->i_private); | |
186 | } | |
187 | ||
188 | static const struct file_operations dw_mci_regs_fops = { | |
189 | .owner = THIS_MODULE, | |
190 | .open = dw_mci_regs_open, | |
191 | .read = seq_read, | |
192 | .llseek = seq_lseek, | |
193 | .release = single_release, | |
194 | }; | |
195 | ||
196 | static void dw_mci_init_debugfs(struct dw_mci_slot *slot) | |
197 | { | |
198 | struct mmc_host *mmc = slot->mmc; | |
199 | struct dw_mci *host = slot->host; | |
200 | struct dentry *root; | |
201 | struct dentry *node; | |
202 | ||
203 | root = mmc->debugfs_root; | |
204 | if (!root) | |
205 | return; | |
206 | ||
207 | node = debugfs_create_file("regs", S_IRUSR, root, host, | |
208 | &dw_mci_regs_fops); | |
209 | if (!node) | |
210 | goto err; | |
211 | ||
212 | node = debugfs_create_file("req", S_IRUSR, root, slot, | |
213 | &dw_mci_req_fops); | |
214 | if (!node) | |
215 | goto err; | |
216 | ||
217 | node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); | |
218 | if (!node) | |
219 | goto err; | |
220 | ||
221 | node = debugfs_create_x32("pending_events", S_IRUSR, root, | |
222 | (u32 *)&host->pending_events); | |
223 | if (!node) | |
224 | goto err; | |
225 | ||
226 | node = debugfs_create_x32("completed_events", S_IRUSR, root, | |
227 | (u32 *)&host->completed_events); | |
228 | if (!node) | |
229 | goto err; | |
230 | ||
231 | return; | |
232 | ||
233 | err: | |
234 | dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); | |
235 | } | |
236 | #endif /* defined(CONFIG_DEBUG_FS) */ | |
237 | ||
238 | static void dw_mci_set_timeout(struct dw_mci *host) | |
239 | { | |
240 | /* timeout (maximum) */ | |
241 | mci_writel(host, TMOUT, 0xffffffff); | |
242 | } | |
243 | ||
244 | static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) | |
245 | { | |
246 | struct mmc_data *data; | |
800d78bf | 247 | struct dw_mci_slot *slot = mmc_priv(mmc); |
e95baf13 | 248 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
f95f3850 WN |
249 | u32 cmdr; |
250 | cmd->error = -EINPROGRESS; | |
251 | ||
252 | cmdr = cmd->opcode; | |
253 | ||
90c2143a SJ |
254 | if (cmd->opcode == MMC_STOP_TRANSMISSION || |
255 | cmd->opcode == MMC_GO_IDLE_STATE || | |
256 | cmd->opcode == MMC_GO_INACTIVE_STATE || | |
257 | (cmd->opcode == SD_IO_RW_DIRECT && | |
258 | ((cmd->arg >> 9) & 0x1FFFF) == SDIO_CCCR_ABORT)) | |
f95f3850 WN |
259 | cmdr |= SDMMC_CMD_STOP; |
260 | else | |
90c2143a SJ |
261 | if (cmd->opcode != MMC_SEND_STATUS && cmd->data) |
262 | cmdr |= SDMMC_CMD_PRV_DAT_WAIT; | |
f95f3850 WN |
263 | |
264 | if (cmd->flags & MMC_RSP_PRESENT) { | |
265 | /* We expect a response, so set this bit */ | |
266 | cmdr |= SDMMC_CMD_RESP_EXP; | |
267 | if (cmd->flags & MMC_RSP_136) | |
268 | cmdr |= SDMMC_CMD_RESP_LONG; | |
269 | } | |
270 | ||
271 | if (cmd->flags & MMC_RSP_CRC) | |
272 | cmdr |= SDMMC_CMD_RESP_CRC; | |
273 | ||
274 | data = cmd->data; | |
275 | if (data) { | |
276 | cmdr |= SDMMC_CMD_DAT_EXP; | |
277 | if (data->flags & MMC_DATA_STREAM) | |
278 | cmdr |= SDMMC_CMD_STRM_MODE; | |
279 | if (data->flags & MMC_DATA_WRITE) | |
280 | cmdr |= SDMMC_CMD_DAT_WR; | |
281 | } | |
282 | ||
cb27a843 JH |
283 | if (drv_data && drv_data->prepare_command) |
284 | drv_data->prepare_command(slot->host, &cmdr); | |
800d78bf | 285 | |
f95f3850 WN |
286 | return cmdr; |
287 | } | |
288 | ||
90c2143a SJ |
289 | static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) |
290 | { | |
291 | struct mmc_command *stop; | |
292 | u32 cmdr; | |
293 | ||
294 | if (!cmd->data) | |
295 | return 0; | |
296 | ||
297 | stop = &host->stop_abort; | |
298 | cmdr = cmd->opcode; | |
299 | memset(stop, 0, sizeof(struct mmc_command)); | |
300 | ||
301 | if (cmdr == MMC_READ_SINGLE_BLOCK || | |
302 | cmdr == MMC_READ_MULTIPLE_BLOCK || | |
303 | cmdr == MMC_WRITE_BLOCK || | |
304 | cmdr == MMC_WRITE_MULTIPLE_BLOCK) { | |
305 | stop->opcode = MMC_STOP_TRANSMISSION; | |
306 | stop->arg = 0; | |
307 | stop->flags = MMC_RSP_R1B | MMC_CMD_AC; | |
308 | } else if (cmdr == SD_IO_RW_EXTENDED) { | |
309 | stop->opcode = SD_IO_RW_DIRECT; | |
310 | stop->arg |= (1 << 31) | (0 << 28) | (SDIO_CCCR_ABORT << 9) | | |
311 | ((cmd->arg >> 28) & 0x7); | |
312 | stop->flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; | |
313 | } else { | |
314 | return 0; | |
315 | } | |
316 | ||
317 | cmdr = stop->opcode | SDMMC_CMD_STOP | | |
318 | SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; | |
319 | ||
320 | return cmdr; | |
321 | } | |
322 | ||
f95f3850 WN |
323 | static void dw_mci_start_command(struct dw_mci *host, |
324 | struct mmc_command *cmd, u32 cmd_flags) | |
325 | { | |
326 | host->cmd = cmd; | |
4a90920c | 327 | dev_vdbg(host->dev, |
f95f3850 WN |
328 | "start command: ARGR=0x%08x CMDR=0x%08x\n", |
329 | cmd->arg, cmd_flags); | |
330 | ||
331 | mci_writel(host, CMDARG, cmd->arg); | |
332 | wmb(); | |
333 | ||
334 | mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START); | |
335 | } | |
336 | ||
90c2143a | 337 | static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) |
f95f3850 | 338 | { |
90c2143a SJ |
339 | struct mmc_command *stop = data->stop ? data->stop : &host->stop_abort; |
340 | dw_mci_start_command(host, stop, host->stop_cmdr); | |
f95f3850 WN |
341 | } |
342 | ||
343 | /* DMA interface functions */ | |
344 | static void dw_mci_stop_dma(struct dw_mci *host) | |
345 | { | |
03e8cb53 | 346 | if (host->using_dma) { |
f95f3850 WN |
347 | host->dma_ops->stop(host); |
348 | host->dma_ops->cleanup(host); | |
f95f3850 | 349 | } |
aa50f259 SJ |
350 | |
351 | /* Data transfer was stopped by the interrupt handler */ | |
352 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
f95f3850 WN |
353 | } |
354 | ||
9aa51408 SJ |
355 | static int dw_mci_get_dma_dir(struct mmc_data *data) |
356 | { | |
357 | if (data->flags & MMC_DATA_WRITE) | |
358 | return DMA_TO_DEVICE; | |
359 | else | |
360 | return DMA_FROM_DEVICE; | |
361 | } | |
362 | ||
9beee912 | 363 | #ifdef CONFIG_MMC_DW_IDMAC |
f95f3850 WN |
364 | static void dw_mci_dma_cleanup(struct dw_mci *host) |
365 | { | |
366 | struct mmc_data *data = host->data; | |
367 | ||
368 | if (data) | |
9aa51408 | 369 | if (!data->host_cookie) |
4a90920c | 370 | dma_unmap_sg(host->dev, |
9aa51408 SJ |
371 | data->sg, |
372 | data->sg_len, | |
373 | dw_mci_get_dma_dir(data)); | |
f95f3850 WN |
374 | } |
375 | ||
5ce9d961 SJ |
376 | static void dw_mci_idmac_reset(struct dw_mci *host) |
377 | { | |
378 | u32 bmod = mci_readl(host, BMOD); | |
379 | /* Software reset of DMA */ | |
380 | bmod |= SDMMC_IDMAC_SWRESET; | |
381 | mci_writel(host, BMOD, bmod); | |
382 | } | |
383 | ||
f95f3850 WN |
384 | static void dw_mci_idmac_stop_dma(struct dw_mci *host) |
385 | { | |
386 | u32 temp; | |
387 | ||
388 | /* Disable and reset the IDMAC interface */ | |
389 | temp = mci_readl(host, CTRL); | |
390 | temp &= ~SDMMC_CTRL_USE_IDMAC; | |
391 | temp |= SDMMC_CTRL_DMA_RESET; | |
392 | mci_writel(host, CTRL, temp); | |
393 | ||
394 | /* Stop the IDMAC running */ | |
395 | temp = mci_readl(host, BMOD); | |
a5289a43 | 396 | temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB); |
5ce9d961 | 397 | temp |= SDMMC_IDMAC_SWRESET; |
f95f3850 WN |
398 | mci_writel(host, BMOD, temp); |
399 | } | |
400 | ||
401 | static void dw_mci_idmac_complete_dma(struct dw_mci *host) | |
402 | { | |
403 | struct mmc_data *data = host->data; | |
404 | ||
4a90920c | 405 | dev_vdbg(host->dev, "DMA complete\n"); |
f95f3850 WN |
406 | |
407 | host->dma_ops->cleanup(host); | |
408 | ||
409 | /* | |
410 | * If the card was removed, data will be NULL. No point in trying to | |
411 | * send the stop command or waiting for NBUSY in this case. | |
412 | */ | |
413 | if (data) { | |
414 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
415 | tasklet_schedule(&host->tasklet); | |
416 | } | |
417 | } | |
418 | ||
419 | static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data, | |
420 | unsigned int sg_len) | |
421 | { | |
422 | int i; | |
423 | struct idmac_desc *desc = host->sg_cpu; | |
424 | ||
425 | for (i = 0; i < sg_len; i++, desc++) { | |
426 | unsigned int length = sg_dma_len(&data->sg[i]); | |
427 | u32 mem_addr = sg_dma_address(&data->sg[i]); | |
428 | ||
429 | /* Set the OWN bit and disable interrupts for this descriptor */ | |
430 | desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH; | |
431 | ||
432 | /* Buffer length */ | |
433 | IDMAC_SET_BUFFER1_SIZE(desc, length); | |
434 | ||
435 | /* Physical address to DMA to/from */ | |
436 | desc->des2 = mem_addr; | |
437 | } | |
438 | ||
439 | /* Set first descriptor */ | |
440 | desc = host->sg_cpu; | |
441 | desc->des0 |= IDMAC_DES0_FD; | |
442 | ||
443 | /* Set last descriptor */ | |
444 | desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc); | |
445 | desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC); | |
446 | desc->des0 |= IDMAC_DES0_LD; | |
447 | ||
448 | wmb(); | |
449 | } | |
450 | ||
451 | static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len) | |
452 | { | |
453 | u32 temp; | |
454 | ||
455 | dw_mci_translate_sglist(host, host->data, sg_len); | |
456 | ||
457 | /* Select IDMAC interface */ | |
458 | temp = mci_readl(host, CTRL); | |
459 | temp |= SDMMC_CTRL_USE_IDMAC; | |
460 | mci_writel(host, CTRL, temp); | |
461 | ||
462 | wmb(); | |
463 | ||
464 | /* Enable the IDMAC */ | |
465 | temp = mci_readl(host, BMOD); | |
a5289a43 | 466 | temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB; |
f95f3850 WN |
467 | mci_writel(host, BMOD, temp); |
468 | ||
469 | /* Start it running */ | |
470 | mci_writel(host, PLDMND, 1); | |
471 | } | |
472 | ||
473 | static int dw_mci_idmac_init(struct dw_mci *host) | |
474 | { | |
475 | struct idmac_desc *p; | |
897b69e7 | 476 | int i; |
f95f3850 WN |
477 | |
478 | /* Number of descriptors in the ring buffer */ | |
479 | host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc); | |
480 | ||
481 | /* Forward link the descriptor list */ | |
482 | for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++) | |
483 | p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1)); | |
484 | ||
485 | /* Set the last descriptor as the end-of-ring descriptor */ | |
486 | p->des3 = host->sg_dma; | |
487 | p->des0 = IDMAC_DES0_ER; | |
488 | ||
5ce9d961 | 489 | dw_mci_idmac_reset(host); |
141a712a | 490 | |
f95f3850 | 491 | /* Mask out interrupts - get Tx & Rx complete only */ |
fc79a4d6 | 492 | mci_writel(host, IDSTS, IDMAC_INT_CLR); |
f95f3850 WN |
493 | mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI | |
494 | SDMMC_IDMAC_INT_TI); | |
495 | ||
496 | /* Set the descriptor base address */ | |
497 | mci_writel(host, DBADDR, host->sg_dma); | |
498 | return 0; | |
499 | } | |
500 | ||
8e2b36ea | 501 | static const struct dw_mci_dma_ops dw_mci_idmac_ops = { |
885c3e80 SJ |
502 | .init = dw_mci_idmac_init, |
503 | .start = dw_mci_idmac_start_dma, | |
504 | .stop = dw_mci_idmac_stop_dma, | |
505 | .complete = dw_mci_idmac_complete_dma, | |
506 | .cleanup = dw_mci_dma_cleanup, | |
507 | }; | |
508 | #endif /* CONFIG_MMC_DW_IDMAC */ | |
509 | ||
9aa51408 SJ |
510 | static int dw_mci_pre_dma_transfer(struct dw_mci *host, |
511 | struct mmc_data *data, | |
512 | bool next) | |
f95f3850 WN |
513 | { |
514 | struct scatterlist *sg; | |
9aa51408 | 515 | unsigned int i, sg_len; |
03e8cb53 | 516 | |
9aa51408 SJ |
517 | if (!next && data->host_cookie) |
518 | return data->host_cookie; | |
f95f3850 WN |
519 | |
520 | /* | |
521 | * We don't do DMA on "complex" transfers, i.e. with | |
522 | * non-word-aligned buffers or lengths. Also, we don't bother | |
523 | * with all the DMA setup overhead for short transfers. | |
524 | */ | |
525 | if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD) | |
526 | return -EINVAL; | |
9aa51408 | 527 | |
f95f3850 WN |
528 | if (data->blksz & 3) |
529 | return -EINVAL; | |
530 | ||
531 | for_each_sg(data->sg, sg, data->sg_len, i) { | |
532 | if (sg->offset & 3 || sg->length & 3) | |
533 | return -EINVAL; | |
534 | } | |
535 | ||
4a90920c | 536 | sg_len = dma_map_sg(host->dev, |
9aa51408 SJ |
537 | data->sg, |
538 | data->sg_len, | |
539 | dw_mci_get_dma_dir(data)); | |
540 | if (sg_len == 0) | |
541 | return -EINVAL; | |
03e8cb53 | 542 | |
9aa51408 SJ |
543 | if (next) |
544 | data->host_cookie = sg_len; | |
f95f3850 | 545 | |
9aa51408 SJ |
546 | return sg_len; |
547 | } | |
548 | ||
9aa51408 SJ |
549 | static void dw_mci_pre_req(struct mmc_host *mmc, |
550 | struct mmc_request *mrq, | |
551 | bool is_first_req) | |
552 | { | |
553 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
554 | struct mmc_data *data = mrq->data; | |
555 | ||
556 | if (!slot->host->use_dma || !data) | |
557 | return; | |
558 | ||
559 | if (data->host_cookie) { | |
560 | data->host_cookie = 0; | |
561 | return; | |
562 | } | |
563 | ||
564 | if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) | |
565 | data->host_cookie = 0; | |
566 | } | |
567 | ||
568 | static void dw_mci_post_req(struct mmc_host *mmc, | |
569 | struct mmc_request *mrq, | |
570 | int err) | |
571 | { | |
572 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
573 | struct mmc_data *data = mrq->data; | |
574 | ||
575 | if (!slot->host->use_dma || !data) | |
576 | return; | |
577 | ||
578 | if (data->host_cookie) | |
4a90920c | 579 | dma_unmap_sg(slot->host->dev, |
9aa51408 SJ |
580 | data->sg, |
581 | data->sg_len, | |
582 | dw_mci_get_dma_dir(data)); | |
583 | data->host_cookie = 0; | |
584 | } | |
585 | ||
52426899 SJ |
586 | static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) |
587 | { | |
588 | #ifdef CONFIG_MMC_DW_IDMAC | |
589 | unsigned int blksz = data->blksz; | |
590 | const u32 mszs[] = {1, 4, 8, 16, 32, 64, 128, 256}; | |
591 | u32 fifo_width = 1 << host->data_shift; | |
592 | u32 blksz_depth = blksz / fifo_width, fifoth_val; | |
593 | u32 msize = 0, rx_wmark = 1, tx_wmark, tx_wmark_invers; | |
594 | int idx = (sizeof(mszs) / sizeof(mszs[0])) - 1; | |
595 | ||
596 | tx_wmark = (host->fifo_depth) / 2; | |
597 | tx_wmark_invers = host->fifo_depth - tx_wmark; | |
598 | ||
599 | /* | |
600 | * MSIZE is '1', | |
601 | * if blksz is not a multiple of the FIFO width | |
602 | */ | |
603 | if (blksz % fifo_width) { | |
604 | msize = 0; | |
605 | rx_wmark = 1; | |
606 | goto done; | |
607 | } | |
608 | ||
609 | do { | |
610 | if (!((blksz_depth % mszs[idx]) || | |
611 | (tx_wmark_invers % mszs[idx]))) { | |
612 | msize = idx; | |
613 | rx_wmark = mszs[idx] - 1; | |
614 | break; | |
615 | } | |
616 | } while (--idx > 0); | |
617 | /* | |
618 | * If idx is '0', it won't be tried | |
619 | * Thus, initial values are uesed | |
620 | */ | |
621 | done: | |
622 | fifoth_val = SDMMC_SET_FIFOTH(msize, rx_wmark, tx_wmark); | |
623 | mci_writel(host, FIFOTH, fifoth_val); | |
624 | #endif | |
625 | } | |
626 | ||
f1d2736c SJ |
627 | static void dw_mci_ctrl_rd_thld(struct dw_mci *host, struct mmc_data *data) |
628 | { | |
629 | unsigned int blksz = data->blksz; | |
630 | u32 blksz_depth, fifo_depth; | |
631 | u16 thld_size; | |
632 | ||
633 | WARN_ON(!(data->flags & MMC_DATA_READ)); | |
634 | ||
635 | if (host->timing != MMC_TIMING_MMC_HS200 && | |
636 | host->timing != MMC_TIMING_UHS_SDR104) | |
637 | goto disable; | |
638 | ||
639 | blksz_depth = blksz / (1 << host->data_shift); | |
640 | fifo_depth = host->fifo_depth; | |
641 | ||
642 | if (blksz_depth > fifo_depth) | |
643 | goto disable; | |
644 | ||
645 | /* | |
646 | * If (blksz_depth) >= (fifo_depth >> 1), should be 'thld_size <= blksz' | |
647 | * If (blksz_depth) < (fifo_depth >> 1), should be thld_size = blksz | |
648 | * Currently just choose blksz. | |
649 | */ | |
650 | thld_size = blksz; | |
651 | mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(thld_size, 1)); | |
652 | return; | |
653 | ||
654 | disable: | |
655 | mci_writel(host, CDTHRCTL, SDMMC_SET_RD_THLD(0, 0)); | |
656 | } | |
657 | ||
9aa51408 SJ |
658 | static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) |
659 | { | |
660 | int sg_len; | |
661 | u32 temp; | |
662 | ||
663 | host->using_dma = 0; | |
664 | ||
665 | /* If we don't have a channel, we can't do DMA */ | |
666 | if (!host->use_dma) | |
667 | return -ENODEV; | |
668 | ||
669 | sg_len = dw_mci_pre_dma_transfer(host, data, 0); | |
a99aa9b9 SJ |
670 | if (sg_len < 0) { |
671 | host->dma_ops->stop(host); | |
9aa51408 | 672 | return sg_len; |
a99aa9b9 | 673 | } |
9aa51408 SJ |
674 | |
675 | host->using_dma = 1; | |
f95f3850 | 676 | |
4a90920c | 677 | dev_vdbg(host->dev, |
f95f3850 WN |
678 | "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n", |
679 | (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma, | |
680 | sg_len); | |
681 | ||
52426899 SJ |
682 | /* |
683 | * Decide the MSIZE and RX/TX Watermark. | |
684 | * If current block size is same with previous size, | |
685 | * no need to update fifoth. | |
686 | */ | |
687 | if (host->prev_blksz != data->blksz) | |
688 | dw_mci_adjust_fifoth(host, data); | |
689 | ||
f95f3850 WN |
690 | /* Enable the DMA interface */ |
691 | temp = mci_readl(host, CTRL); | |
692 | temp |= SDMMC_CTRL_DMA_ENABLE; | |
693 | mci_writel(host, CTRL, temp); | |
694 | ||
695 | /* Disable RX/TX IRQs, let DMA handle it */ | |
696 | temp = mci_readl(host, INTMASK); | |
697 | temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR); | |
698 | mci_writel(host, INTMASK, temp); | |
699 | ||
700 | host->dma_ops->start(host, sg_len); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data) | |
706 | { | |
707 | u32 temp; | |
708 | ||
709 | data->error = -EINPROGRESS; | |
710 | ||
711 | WARN_ON(host->data); | |
712 | host->sg = NULL; | |
713 | host->data = data; | |
714 | ||
f1d2736c | 715 | if (data->flags & MMC_DATA_READ) { |
55c5efbc | 716 | host->dir_status = DW_MCI_RECV_STATUS; |
f1d2736c SJ |
717 | dw_mci_ctrl_rd_thld(host, data); |
718 | } else { | |
55c5efbc | 719 | host->dir_status = DW_MCI_SEND_STATUS; |
f1d2736c | 720 | } |
55c5efbc | 721 | |
f95f3850 | 722 | if (dw_mci_submit_data_dma(host, data)) { |
f9c2a0dc SJ |
723 | int flags = SG_MITER_ATOMIC; |
724 | if (host->data->flags & MMC_DATA_READ) | |
725 | flags |= SG_MITER_TO_SG; | |
726 | else | |
727 | flags |= SG_MITER_FROM_SG; | |
728 | ||
729 | sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags); | |
f95f3850 | 730 | host->sg = data->sg; |
34b664a2 JH |
731 | host->part_buf_start = 0; |
732 | host->part_buf_count = 0; | |
f95f3850 | 733 | |
b40af3aa | 734 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR); |
f95f3850 WN |
735 | temp = mci_readl(host, INTMASK); |
736 | temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR; | |
737 | mci_writel(host, INTMASK, temp); | |
738 | ||
739 | temp = mci_readl(host, CTRL); | |
740 | temp &= ~SDMMC_CTRL_DMA_ENABLE; | |
741 | mci_writel(host, CTRL, temp); | |
52426899 SJ |
742 | |
743 | /* | |
744 | * Use the initial fifoth_val for PIO mode. | |
745 | * If next issued data may be transfered by DMA mode, | |
746 | * prev_blksz should be invalidated. | |
747 | */ | |
748 | mci_writel(host, FIFOTH, host->fifoth_val); | |
749 | host->prev_blksz = 0; | |
750 | } else { | |
751 | /* | |
752 | * Keep the current block size. | |
753 | * It will be used to decide whether to update | |
754 | * fifoth register next time. | |
755 | */ | |
756 | host->prev_blksz = data->blksz; | |
f95f3850 WN |
757 | } |
758 | } | |
759 | ||
760 | static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg) | |
761 | { | |
762 | struct dw_mci *host = slot->host; | |
763 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
764 | unsigned int cmd_status = 0; | |
765 | ||
766 | mci_writel(host, CMDARG, arg); | |
767 | wmb(); | |
768 | mci_writel(host, CMD, SDMMC_CMD_START | cmd); | |
769 | ||
770 | while (time_before(jiffies, timeout)) { | |
771 | cmd_status = mci_readl(host, CMD); | |
772 | if (!(cmd_status & SDMMC_CMD_START)) | |
773 | return; | |
774 | } | |
775 | dev_err(&slot->mmc->class_dev, | |
776 | "Timeout sending command (cmd %#x arg %#x status %#x)\n", | |
777 | cmd, arg, cmd_status); | |
778 | } | |
779 | ||
ab269128 | 780 | static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) |
f95f3850 WN |
781 | { |
782 | struct dw_mci *host = slot->host; | |
fdf492a1 | 783 | unsigned int clock = slot->clock; |
f95f3850 | 784 | u32 div; |
9623b5b9 | 785 | u32 clk_en_a; |
f95f3850 | 786 | |
fdf492a1 DA |
787 | if (!clock) { |
788 | mci_writel(host, CLKENA, 0); | |
789 | mci_send_cmd(slot, | |
790 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
791 | } else if (clock != host->current_speed || force_clkinit) { | |
792 | div = host->bus_hz / clock; | |
793 | if (host->bus_hz % clock && host->bus_hz > clock) | |
f95f3850 WN |
794 | /* |
795 | * move the + 1 after the divide to prevent | |
796 | * over-clocking the card. | |
797 | */ | |
e419990b SJ |
798 | div += 1; |
799 | ||
fdf492a1 | 800 | div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; |
f95f3850 | 801 | |
fdf492a1 DA |
802 | if ((clock << div) != slot->__clk_old || force_clkinit) |
803 | dev_info(&slot->mmc->class_dev, | |
804 | "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", | |
805 | slot->id, host->bus_hz, clock, | |
806 | div ? ((host->bus_hz / div) >> 1) : | |
807 | host->bus_hz, div); | |
f95f3850 WN |
808 | |
809 | /* disable clock */ | |
810 | mci_writel(host, CLKENA, 0); | |
811 | mci_writel(host, CLKSRC, 0); | |
812 | ||
813 | /* inform CIU */ | |
814 | mci_send_cmd(slot, | |
815 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
816 | ||
817 | /* set clock to desired speed */ | |
818 | mci_writel(host, CLKDIV, div); | |
819 | ||
820 | /* inform CIU */ | |
821 | mci_send_cmd(slot, | |
822 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
823 | ||
9623b5b9 DA |
824 | /* enable clock; only low power if no SDIO */ |
825 | clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; | |
826 | if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->id))) | |
827 | clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; | |
828 | mci_writel(host, CLKENA, clk_en_a); | |
f95f3850 WN |
829 | |
830 | /* inform CIU */ | |
831 | mci_send_cmd(slot, | |
832 | SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
833 | ||
fdf492a1 DA |
834 | /* keep the clock with reflecting clock dividor */ |
835 | slot->__clk_old = clock << div; | |
f95f3850 WN |
836 | } |
837 | ||
fdf492a1 DA |
838 | host->current_speed = clock; |
839 | ||
f95f3850 | 840 | /* Set the current slot bus width */ |
1d56c453 | 841 | mci_writel(host, CTYPE, (slot->ctype << slot->id)); |
f95f3850 WN |
842 | } |
843 | ||
053b3ce6 SJ |
844 | static void __dw_mci_start_request(struct dw_mci *host, |
845 | struct dw_mci_slot *slot, | |
846 | struct mmc_command *cmd) | |
f95f3850 WN |
847 | { |
848 | struct mmc_request *mrq; | |
f95f3850 WN |
849 | struct mmc_data *data; |
850 | u32 cmdflags; | |
851 | ||
852 | mrq = slot->mrq; | |
853 | if (host->pdata->select_slot) | |
854 | host->pdata->select_slot(slot->id); | |
855 | ||
f95f3850 WN |
856 | host->cur_slot = slot; |
857 | host->mrq = mrq; | |
858 | ||
859 | host->pending_events = 0; | |
860 | host->completed_events = 0; | |
e352c813 | 861 | host->cmd_status = 0; |
f95f3850 | 862 | host->data_status = 0; |
e352c813 | 863 | host->dir_status = 0; |
f95f3850 | 864 | |
053b3ce6 | 865 | data = cmd->data; |
f95f3850 WN |
866 | if (data) { |
867 | dw_mci_set_timeout(host); | |
868 | mci_writel(host, BYTCNT, data->blksz*data->blocks); | |
869 | mci_writel(host, BLKSIZ, data->blksz); | |
870 | } | |
871 | ||
f95f3850 WN |
872 | cmdflags = dw_mci_prepare_command(slot->mmc, cmd); |
873 | ||
874 | /* this is the first command, send the initialization clock */ | |
875 | if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags)) | |
876 | cmdflags |= SDMMC_CMD_INIT; | |
877 | ||
878 | if (data) { | |
879 | dw_mci_submit_data(host, data); | |
880 | wmb(); | |
881 | } | |
882 | ||
883 | dw_mci_start_command(host, cmd, cmdflags); | |
884 | ||
885 | if (mrq->stop) | |
886 | host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); | |
90c2143a SJ |
887 | else |
888 | host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); | |
f95f3850 WN |
889 | } |
890 | ||
053b3ce6 SJ |
891 | static void dw_mci_start_request(struct dw_mci *host, |
892 | struct dw_mci_slot *slot) | |
893 | { | |
894 | struct mmc_request *mrq = slot->mrq; | |
895 | struct mmc_command *cmd; | |
896 | ||
897 | cmd = mrq->sbc ? mrq->sbc : mrq->cmd; | |
898 | __dw_mci_start_request(host, slot, cmd); | |
899 | } | |
900 | ||
7456caae | 901 | /* must be called with host->lock held */ |
f95f3850 WN |
902 | static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot, |
903 | struct mmc_request *mrq) | |
904 | { | |
905 | dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", | |
906 | host->state); | |
907 | ||
f95f3850 WN |
908 | slot->mrq = mrq; |
909 | ||
910 | if (host->state == STATE_IDLE) { | |
911 | host->state = STATE_SENDING_CMD; | |
912 | dw_mci_start_request(host, slot); | |
913 | } else { | |
914 | list_add_tail(&slot->queue_node, &host->queue); | |
915 | } | |
f95f3850 WN |
916 | } |
917 | ||
918 | static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
919 | { | |
920 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
921 | struct dw_mci *host = slot->host; | |
922 | ||
923 | WARN_ON(slot->mrq); | |
924 | ||
7456caae JH |
925 | /* |
926 | * The check for card presence and queueing of the request must be | |
927 | * atomic, otherwise the card could be removed in between and the | |
928 | * request wouldn't fail until another card was inserted. | |
929 | */ | |
930 | spin_lock_bh(&host->lock); | |
931 | ||
f95f3850 | 932 | if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { |
7456caae | 933 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
934 | mrq->cmd->error = -ENOMEDIUM; |
935 | mmc_request_done(mmc, mrq); | |
936 | return; | |
937 | } | |
938 | ||
f95f3850 | 939 | dw_mci_queue_request(host, slot, mrq); |
7456caae JH |
940 | |
941 | spin_unlock_bh(&host->lock); | |
f95f3850 WN |
942 | } |
943 | ||
944 | static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
945 | { | |
946 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
e95baf13 | 947 | const struct dw_mci_drv_data *drv_data = slot->host->drv_data; |
41babf75 | 948 | u32 regs; |
f95f3850 | 949 | |
f95f3850 | 950 | switch (ios->bus_width) { |
f95f3850 WN |
951 | case MMC_BUS_WIDTH_4: |
952 | slot->ctype = SDMMC_CTYPE_4BIT; | |
953 | break; | |
c9b2a06f JC |
954 | case MMC_BUS_WIDTH_8: |
955 | slot->ctype = SDMMC_CTYPE_8BIT; | |
956 | break; | |
b2f7cb45 JC |
957 | default: |
958 | /* set default 1 bit mode */ | |
959 | slot->ctype = SDMMC_CTYPE_1BIT; | |
f95f3850 WN |
960 | } |
961 | ||
3f514291 SJ |
962 | regs = mci_readl(slot->host, UHS_REG); |
963 | ||
41babf75 | 964 | /* DDR mode set */ |
cab3a802 | 965 | if (ios->timing == MMC_TIMING_MMC_DDR52) |
c69042a5 | 966 | regs |= ((0x1 << slot->id) << 16); |
3f514291 | 967 | else |
c69042a5 | 968 | regs &= ~((0x1 << slot->id) << 16); |
3f514291 SJ |
969 | |
970 | mci_writel(slot->host, UHS_REG, regs); | |
f1d2736c | 971 | slot->host->timing = ios->timing; |
41babf75 | 972 | |
fdf492a1 DA |
973 | /* |
974 | * Use mirror of ios->clock to prevent race with mmc | |
975 | * core ios update when finding the minimum. | |
976 | */ | |
977 | slot->clock = ios->clock; | |
f95f3850 | 978 | |
cb27a843 JH |
979 | if (drv_data && drv_data->set_ios) |
980 | drv_data->set_ios(slot->host, ios); | |
800d78bf | 981 | |
bf7cb224 JC |
982 | /* Slot specific timing and width adjustment */ |
983 | dw_mci_setup_bus(slot, false); | |
984 | ||
f95f3850 WN |
985 | switch (ios->power_mode) { |
986 | case MMC_POWER_UP: | |
987 | set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); | |
e6f34e2f JH |
988 | /* Power up slot */ |
989 | if (slot->host->pdata->setpower) | |
990 | slot->host->pdata->setpower(slot->id, mmc->ocr_avail); | |
4366dcc5 JC |
991 | regs = mci_readl(slot->host, PWREN); |
992 | regs |= (1 << slot->id); | |
993 | mci_writel(slot->host, PWREN, regs); | |
e6f34e2f JH |
994 | break; |
995 | case MMC_POWER_OFF: | |
996 | /* Power down slot */ | |
997 | if (slot->host->pdata->setpower) | |
998 | slot->host->pdata->setpower(slot->id, 0); | |
4366dcc5 JC |
999 | regs = mci_readl(slot->host, PWREN); |
1000 | regs &= ~(1 << slot->id); | |
1001 | mci_writel(slot->host, PWREN, regs); | |
f95f3850 WN |
1002 | break; |
1003 | default: | |
1004 | break; | |
1005 | } | |
1006 | } | |
1007 | ||
1008 | static int dw_mci_get_ro(struct mmc_host *mmc) | |
1009 | { | |
1010 | int read_only; | |
1011 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1012 | struct dw_mci_board *brd = slot->host->pdata; | |
1013 | ||
1014 | /* Use platform get_ro function, else try on board write protect */ | |
9640639b | 1015 | if (slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT) |
b4967aa5 TA |
1016 | read_only = 0; |
1017 | else if (brd->get_ro) | |
f95f3850 | 1018 | read_only = brd->get_ro(slot->id); |
55a6ceb2 DA |
1019 | else if (gpio_is_valid(slot->wp_gpio)) |
1020 | read_only = gpio_get_value(slot->wp_gpio); | |
f95f3850 WN |
1021 | else |
1022 | read_only = | |
1023 | mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0; | |
1024 | ||
1025 | dev_dbg(&mmc->class_dev, "card is %s\n", | |
1026 | read_only ? "read-only" : "read-write"); | |
1027 | ||
1028 | return read_only; | |
1029 | } | |
1030 | ||
1031 | static int dw_mci_get_cd(struct mmc_host *mmc) | |
1032 | { | |
1033 | int present; | |
1034 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1035 | struct dw_mci_board *brd = slot->host->pdata; | |
7cf347bd ZG |
1036 | struct dw_mci *host = slot->host; |
1037 | int gpio_cd = mmc_gpio_get_cd(mmc); | |
f95f3850 WN |
1038 | |
1039 | /* Use platform get_cd function, else try onboard card detect */ | |
fc3d7720 JC |
1040 | if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION) |
1041 | present = 1; | |
1042 | else if (brd->get_cd) | |
f95f3850 | 1043 | present = !brd->get_cd(slot->id); |
bf626e55 | 1044 | else if (!IS_ERR_VALUE(gpio_cd)) |
7cf347bd | 1045 | present = gpio_cd; |
f95f3850 WN |
1046 | else |
1047 | present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) | |
1048 | == 0 ? 1 : 0; | |
1049 | ||
7cf347bd | 1050 | spin_lock_bh(&host->lock); |
bf626e55 ZG |
1051 | if (present) { |
1052 | set_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1053 | dev_dbg(&mmc->class_dev, "card is present\n"); |
bf626e55 ZG |
1054 | } else { |
1055 | clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); | |
f95f3850 | 1056 | dev_dbg(&mmc->class_dev, "card is not present\n"); |
bf626e55 | 1057 | } |
7cf347bd | 1058 | spin_unlock_bh(&host->lock); |
f95f3850 WN |
1059 | |
1060 | return present; | |
1061 | } | |
1062 | ||
9623b5b9 DA |
1063 | /* |
1064 | * Disable lower power mode. | |
1065 | * | |
1066 | * Low power mode will stop the card clock when idle. According to the | |
1067 | * description of the CLKENA register we should disable low power mode | |
1068 | * for SDIO cards if we need SDIO interrupts to work. | |
1069 | * | |
1070 | * This function is fast if low power mode is already disabled. | |
1071 | */ | |
1072 | static void dw_mci_disable_low_power(struct dw_mci_slot *slot) | |
1073 | { | |
1074 | struct dw_mci *host = slot->host; | |
1075 | u32 clk_en_a; | |
1076 | const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; | |
1077 | ||
1078 | clk_en_a = mci_readl(host, CLKENA); | |
1079 | ||
1080 | if (clk_en_a & clken_low_pwr) { | |
1081 | mci_writel(host, CLKENA, clk_en_a & ~clken_low_pwr); | |
1082 | mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | | |
1083 | SDMMC_CMD_PRV_DAT_WAIT, 0); | |
1084 | } | |
1085 | } | |
1086 | ||
1a5c8e1f SH |
1087 | static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) |
1088 | { | |
1089 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1090 | struct dw_mci *host = slot->host; | |
1091 | u32 int_mask; | |
1092 | ||
1093 | /* Enable/disable Slot Specific SDIO interrupt */ | |
1094 | int_mask = mci_readl(host, INTMASK); | |
1095 | if (enb) { | |
9623b5b9 DA |
1096 | /* |
1097 | * Turn off low power mode if it was enabled. This is a bit of | |
1098 | * a heavy operation and we disable / enable IRQs a lot, so | |
1099 | * we'll leave low power mode disabled and it will get | |
1100 | * re-enabled again in dw_mci_setup_bus(). | |
1101 | */ | |
1102 | dw_mci_disable_low_power(slot); | |
1103 | ||
1a5c8e1f | 1104 | mci_writel(host, INTMASK, |
705ad047 | 1105 | (int_mask | SDMMC_INT_SDIO(slot->id))); |
1a5c8e1f SH |
1106 | } else { |
1107 | mci_writel(host, INTMASK, | |
705ad047 | 1108 | (int_mask & ~SDMMC_INT_SDIO(slot->id))); |
1a5c8e1f SH |
1109 | } |
1110 | } | |
1111 | ||
0976f16d SJ |
1112 | static int dw_mci_execute_tuning(struct mmc_host *mmc, u32 opcode) |
1113 | { | |
1114 | struct dw_mci_slot *slot = mmc_priv(mmc); | |
1115 | struct dw_mci *host = slot->host; | |
1116 | const struct dw_mci_drv_data *drv_data = host->drv_data; | |
1117 | struct dw_mci_tuning_data tuning_data; | |
1118 | int err = -ENOSYS; | |
1119 | ||
1120 | if (opcode == MMC_SEND_TUNING_BLOCK_HS200) { | |
1121 | if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) { | |
1122 | tuning_data.blk_pattern = tuning_blk_pattern_8bit; | |
1123 | tuning_data.blksz = sizeof(tuning_blk_pattern_8bit); | |
1124 | } else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) { | |
1125 | tuning_data.blk_pattern = tuning_blk_pattern_4bit; | |
1126 | tuning_data.blksz = sizeof(tuning_blk_pattern_4bit); | |
1127 | } else { | |
1128 | return -EINVAL; | |
1129 | } | |
1130 | } else if (opcode == MMC_SEND_TUNING_BLOCK) { | |
1131 | tuning_data.blk_pattern = tuning_blk_pattern_4bit; | |
1132 | tuning_data.blksz = sizeof(tuning_blk_pattern_4bit); | |
1133 | } else { | |
1134 | dev_err(host->dev, | |
1135 | "Undefined command(%d) for tuning\n", opcode); | |
1136 | return -EINVAL; | |
1137 | } | |
1138 | ||
1139 | if (drv_data && drv_data->execute_tuning) | |
1140 | err = drv_data->execute_tuning(slot, opcode, &tuning_data); | |
1141 | return err; | |
1142 | } | |
1143 | ||
f95f3850 | 1144 | static const struct mmc_host_ops dw_mci_ops = { |
1a5c8e1f | 1145 | .request = dw_mci_request, |
9aa51408 SJ |
1146 | .pre_req = dw_mci_pre_req, |
1147 | .post_req = dw_mci_post_req, | |
1a5c8e1f SH |
1148 | .set_ios = dw_mci_set_ios, |
1149 | .get_ro = dw_mci_get_ro, | |
1150 | .get_cd = dw_mci_get_cd, | |
1151 | .enable_sdio_irq = dw_mci_enable_sdio_irq, | |
0976f16d | 1152 | .execute_tuning = dw_mci_execute_tuning, |
f95f3850 WN |
1153 | }; |
1154 | ||
1155 | static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq) | |
1156 | __releases(&host->lock) | |
1157 | __acquires(&host->lock) | |
1158 | { | |
1159 | struct dw_mci_slot *slot; | |
1160 | struct mmc_host *prev_mmc = host->cur_slot->mmc; | |
1161 | ||
1162 | WARN_ON(host->cmd || host->data); | |
1163 | ||
1164 | host->cur_slot->mrq = NULL; | |
1165 | host->mrq = NULL; | |
1166 | if (!list_empty(&host->queue)) { | |
1167 | slot = list_entry(host->queue.next, | |
1168 | struct dw_mci_slot, queue_node); | |
1169 | list_del(&slot->queue_node); | |
4a90920c | 1170 | dev_vdbg(host->dev, "list not empty: %s is next\n", |
f95f3850 WN |
1171 | mmc_hostname(slot->mmc)); |
1172 | host->state = STATE_SENDING_CMD; | |
1173 | dw_mci_start_request(host, slot); | |
1174 | } else { | |
4a90920c | 1175 | dev_vdbg(host->dev, "list empty\n"); |
f95f3850 WN |
1176 | host->state = STATE_IDLE; |
1177 | } | |
1178 | ||
1179 | spin_unlock(&host->lock); | |
1180 | mmc_request_done(prev_mmc, mrq); | |
1181 | spin_lock(&host->lock); | |
1182 | } | |
1183 | ||
e352c813 | 1184 | static int dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd) |
f95f3850 WN |
1185 | { |
1186 | u32 status = host->cmd_status; | |
1187 | ||
1188 | host->cmd_status = 0; | |
1189 | ||
1190 | /* Read the response from the card (up to 16 bytes) */ | |
1191 | if (cmd->flags & MMC_RSP_PRESENT) { | |
1192 | if (cmd->flags & MMC_RSP_136) { | |
1193 | cmd->resp[3] = mci_readl(host, RESP0); | |
1194 | cmd->resp[2] = mci_readl(host, RESP1); | |
1195 | cmd->resp[1] = mci_readl(host, RESP2); | |
1196 | cmd->resp[0] = mci_readl(host, RESP3); | |
1197 | } else { | |
1198 | cmd->resp[0] = mci_readl(host, RESP0); | |
1199 | cmd->resp[1] = 0; | |
1200 | cmd->resp[2] = 0; | |
1201 | cmd->resp[3] = 0; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | if (status & SDMMC_INT_RTO) | |
1206 | cmd->error = -ETIMEDOUT; | |
1207 | else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC)) | |
1208 | cmd->error = -EILSEQ; | |
1209 | else if (status & SDMMC_INT_RESP_ERR) | |
1210 | cmd->error = -EIO; | |
1211 | else | |
1212 | cmd->error = 0; | |
1213 | ||
1214 | if (cmd->error) { | |
1215 | /* newer ip versions need a delay between retries */ | |
1216 | if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY) | |
1217 | mdelay(20); | |
f95f3850 | 1218 | } |
e352c813 SJ |
1219 | |
1220 | return cmd->error; | |
1221 | } | |
1222 | ||
1223 | static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) | |
1224 | { | |
31bff450 | 1225 | u32 status = host->data_status; |
e352c813 SJ |
1226 | |
1227 | if (status & DW_MCI_DATA_ERROR_FLAGS) { | |
1228 | if (status & SDMMC_INT_DRTO) { | |
1229 | data->error = -ETIMEDOUT; | |
1230 | } else if (status & SDMMC_INT_DCRC) { | |
1231 | data->error = -EILSEQ; | |
1232 | } else if (status & SDMMC_INT_EBE) { | |
1233 | if (host->dir_status == | |
1234 | DW_MCI_SEND_STATUS) { | |
1235 | /* | |
1236 | * No data CRC status was returned. | |
1237 | * The number of bytes transferred | |
1238 | * will be exaggerated in PIO mode. | |
1239 | */ | |
1240 | data->bytes_xfered = 0; | |
1241 | data->error = -ETIMEDOUT; | |
1242 | } else if (host->dir_status == | |
1243 | DW_MCI_RECV_STATUS) { | |
1244 | data->error = -EIO; | |
1245 | } | |
1246 | } else { | |
1247 | /* SDMMC_INT_SBE is included */ | |
1248 | data->error = -EIO; | |
1249 | } | |
1250 | ||
1251 | dev_err(host->dev, "data error, status 0x%08x\n", status); | |
1252 | ||
1253 | /* | |
1254 | * After an error, there may be data lingering | |
31bff450 | 1255 | * in the FIFO |
e352c813 | 1256 | */ |
31bff450 | 1257 | dw_mci_fifo_reset(host); |
e352c813 SJ |
1258 | } else { |
1259 | data->bytes_xfered = data->blocks * data->blksz; | |
1260 | data->error = 0; | |
1261 | } | |
1262 | ||
1263 | return data->error; | |
f95f3850 WN |
1264 | } |
1265 | ||
1266 | static void dw_mci_tasklet_func(unsigned long priv) | |
1267 | { | |
1268 | struct dw_mci *host = (struct dw_mci *)priv; | |
1269 | struct mmc_data *data; | |
1270 | struct mmc_command *cmd; | |
e352c813 | 1271 | struct mmc_request *mrq; |
f95f3850 WN |
1272 | enum dw_mci_state state; |
1273 | enum dw_mci_state prev_state; | |
e352c813 | 1274 | unsigned int err; |
f95f3850 WN |
1275 | |
1276 | spin_lock(&host->lock); | |
1277 | ||
1278 | state = host->state; | |
1279 | data = host->data; | |
e352c813 | 1280 | mrq = host->mrq; |
f95f3850 WN |
1281 | |
1282 | do { | |
1283 | prev_state = state; | |
1284 | ||
1285 | switch (state) { | |
1286 | case STATE_IDLE: | |
1287 | break; | |
1288 | ||
1289 | case STATE_SENDING_CMD: | |
1290 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1291 | &host->pending_events)) | |
1292 | break; | |
1293 | ||
1294 | cmd = host->cmd; | |
1295 | host->cmd = NULL; | |
1296 | set_bit(EVENT_CMD_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1297 | err = dw_mci_command_complete(host, cmd); |
1298 | if (cmd == mrq->sbc && !err) { | |
053b3ce6 SJ |
1299 | prev_state = state = STATE_SENDING_CMD; |
1300 | __dw_mci_start_request(host, host->cur_slot, | |
e352c813 | 1301 | mrq->cmd); |
053b3ce6 SJ |
1302 | goto unlock; |
1303 | } | |
1304 | ||
e352c813 | 1305 | if (cmd->data && err) { |
71abb133 | 1306 | dw_mci_stop_dma(host); |
90c2143a SJ |
1307 | send_stop_abort(host, data); |
1308 | state = STATE_SENDING_STOP; | |
1309 | break; | |
71abb133 SJ |
1310 | } |
1311 | ||
e352c813 SJ |
1312 | if (!cmd->data || err) { |
1313 | dw_mci_request_end(host, mrq); | |
f95f3850 WN |
1314 | goto unlock; |
1315 | } | |
1316 | ||
1317 | prev_state = state = STATE_SENDING_DATA; | |
1318 | /* fall through */ | |
1319 | ||
1320 | case STATE_SENDING_DATA: | |
1321 | if (test_and_clear_bit(EVENT_DATA_ERROR, | |
1322 | &host->pending_events)) { | |
1323 | dw_mci_stop_dma(host); | |
90c2143a | 1324 | send_stop_abort(host, data); |
f95f3850 WN |
1325 | state = STATE_DATA_ERROR; |
1326 | break; | |
1327 | } | |
1328 | ||
1329 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1330 | &host->pending_events)) | |
1331 | break; | |
1332 | ||
1333 | set_bit(EVENT_XFER_COMPLETE, &host->completed_events); | |
1334 | prev_state = state = STATE_DATA_BUSY; | |
1335 | /* fall through */ | |
1336 | ||
1337 | case STATE_DATA_BUSY: | |
1338 | if (!test_and_clear_bit(EVENT_DATA_COMPLETE, | |
1339 | &host->pending_events)) | |
1340 | break; | |
1341 | ||
1342 | host->data = NULL; | |
1343 | set_bit(EVENT_DATA_COMPLETE, &host->completed_events); | |
e352c813 SJ |
1344 | err = dw_mci_data_complete(host, data); |
1345 | ||
1346 | if (!err) { | |
1347 | if (!data->stop || mrq->sbc) { | |
17c8bc85 | 1348 | if (mrq->sbc && data->stop) |
e352c813 SJ |
1349 | data->stop->error = 0; |
1350 | dw_mci_request_end(host, mrq); | |
1351 | goto unlock; | |
f95f3850 | 1352 | } |
f95f3850 | 1353 | |
e352c813 SJ |
1354 | /* stop command for open-ended transfer*/ |
1355 | if (data->stop) | |
1356 | send_stop_abort(host, data); | |
053b3ce6 SJ |
1357 | } |
1358 | ||
e352c813 SJ |
1359 | /* |
1360 | * If err has non-zero, | |
1361 | * stop-abort command has been already issued. | |
1362 | */ | |
f95f3850 | 1363 | prev_state = state = STATE_SENDING_STOP; |
e352c813 | 1364 | |
f95f3850 WN |
1365 | /* fall through */ |
1366 | ||
1367 | case STATE_SENDING_STOP: | |
1368 | if (!test_and_clear_bit(EVENT_CMD_COMPLETE, | |
1369 | &host->pending_events)) | |
1370 | break; | |
1371 | ||
71abb133 | 1372 | /* CMD error in data command */ |
31bff450 SJ |
1373 | if (mrq->cmd->error && mrq->data) |
1374 | dw_mci_fifo_reset(host); | |
71abb133 | 1375 | |
f95f3850 | 1376 | host->cmd = NULL; |
71abb133 | 1377 | host->data = NULL; |
90c2143a | 1378 | |
e352c813 SJ |
1379 | if (mrq->stop) |
1380 | dw_mci_command_complete(host, mrq->stop); | |
90c2143a SJ |
1381 | else |
1382 | host->cmd_status = 0; | |
1383 | ||
e352c813 | 1384 | dw_mci_request_end(host, mrq); |
f95f3850 WN |
1385 | goto unlock; |
1386 | ||
1387 | case STATE_DATA_ERROR: | |
1388 | if (!test_and_clear_bit(EVENT_XFER_COMPLETE, | |
1389 | &host->pending_events)) | |
1390 | break; | |
1391 | ||
1392 | state = STATE_DATA_BUSY; | |
1393 | break; | |
1394 | } | |
1395 | } while (state != prev_state); | |
1396 | ||
1397 | host->state = state; | |
1398 | unlock: | |
1399 | spin_unlock(&host->lock); | |
1400 | ||
1401 | } | |
1402 | ||
34b664a2 JH |
1403 | /* push final bytes to part_buf, only use during push */ |
1404 | static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1405 | { |
34b664a2 JH |
1406 | memcpy((void *)&host->part_buf, buf, cnt); |
1407 | host->part_buf_count = cnt; | |
1408 | } | |
f95f3850 | 1409 | |
34b664a2 JH |
1410 | /* append bytes to part_buf, only use during push */ |
1411 | static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1412 | { | |
1413 | cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count); | |
1414 | memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt); | |
1415 | host->part_buf_count += cnt; | |
1416 | return cnt; | |
1417 | } | |
f95f3850 | 1418 | |
34b664a2 JH |
1419 | /* pull first bytes from part_buf, only use during pull */ |
1420 | static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt) | |
1421 | { | |
1422 | cnt = min(cnt, (int)host->part_buf_count); | |
1423 | if (cnt) { | |
1424 | memcpy(buf, (void *)&host->part_buf + host->part_buf_start, | |
1425 | cnt); | |
1426 | host->part_buf_count -= cnt; | |
1427 | host->part_buf_start += cnt; | |
f95f3850 | 1428 | } |
34b664a2 | 1429 | return cnt; |
f95f3850 WN |
1430 | } |
1431 | ||
34b664a2 JH |
1432 | /* pull final bytes from the part_buf, assuming it's just been filled */ |
1433 | static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt) | |
f95f3850 | 1434 | { |
34b664a2 JH |
1435 | memcpy(buf, &host->part_buf, cnt); |
1436 | host->part_buf_start = cnt; | |
1437 | host->part_buf_count = (1 << host->data_shift) - cnt; | |
1438 | } | |
f95f3850 | 1439 | |
34b664a2 JH |
1440 | static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt) |
1441 | { | |
cfbeb59c MC |
1442 | struct mmc_data *data = host->data; |
1443 | int init_cnt = cnt; | |
1444 | ||
34b664a2 JH |
1445 | /* try and push anything in the part_buf */ |
1446 | if (unlikely(host->part_buf_count)) { | |
1447 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1448 | buf += len; | |
1449 | cnt -= len; | |
cfbeb59c | 1450 | if (host->part_buf_count == 2) { |
4e0a5adf JC |
1451 | mci_writew(host, DATA(host->data_offset), |
1452 | host->part_buf16); | |
34b664a2 JH |
1453 | host->part_buf_count = 0; |
1454 | } | |
1455 | } | |
1456 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1457 | if (unlikely((unsigned long)buf & 0x1)) { | |
1458 | while (cnt >= 2) { | |
1459 | u16 aligned_buf[64]; | |
1460 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1461 | int items = len >> 1; | |
1462 | int i; | |
1463 | /* memcpy from input buffer into aligned buffer */ | |
1464 | memcpy(aligned_buf, buf, len); | |
1465 | buf += len; | |
1466 | cnt -= len; | |
1467 | /* push data from aligned buffer into fifo */ | |
1468 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1469 | mci_writew(host, DATA(host->data_offset), |
1470 | aligned_buf[i]); | |
34b664a2 JH |
1471 | } |
1472 | } else | |
1473 | #endif | |
1474 | { | |
1475 | u16 *pdata = buf; | |
1476 | for (; cnt >= 2; cnt -= 2) | |
4e0a5adf | 1477 | mci_writew(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1478 | buf = pdata; |
1479 | } | |
1480 | /* put anything remaining in the part_buf */ | |
1481 | if (cnt) { | |
1482 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
1483 | /* Push data if we have reached the expected data length */ |
1484 | if ((data->bytes_xfered + init_cnt) == | |
1485 | (data->blksz * data->blocks)) | |
4e0a5adf | 1486 | mci_writew(host, DATA(host->data_offset), |
cfbeb59c | 1487 | host->part_buf16); |
34b664a2 JH |
1488 | } |
1489 | } | |
f95f3850 | 1490 | |
34b664a2 JH |
1491 | static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt) |
1492 | { | |
1493 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1494 | if (unlikely((unsigned long)buf & 0x1)) { | |
1495 | while (cnt >= 2) { | |
1496 | /* pull data from fifo into aligned buffer */ | |
1497 | u16 aligned_buf[64]; | |
1498 | int len = min(cnt & -2, (int)sizeof(aligned_buf)); | |
1499 | int items = len >> 1; | |
1500 | int i; | |
1501 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1502 | aligned_buf[i] = mci_readw(host, |
1503 | DATA(host->data_offset)); | |
34b664a2 JH |
1504 | /* memcpy from aligned buffer into output buffer */ |
1505 | memcpy(buf, aligned_buf, len); | |
1506 | buf += len; | |
1507 | cnt -= len; | |
1508 | } | |
1509 | } else | |
1510 | #endif | |
1511 | { | |
1512 | u16 *pdata = buf; | |
1513 | for (; cnt >= 2; cnt -= 2) | |
4e0a5adf | 1514 | *pdata++ = mci_readw(host, DATA(host->data_offset)); |
34b664a2 JH |
1515 | buf = pdata; |
1516 | } | |
1517 | if (cnt) { | |
4e0a5adf | 1518 | host->part_buf16 = mci_readw(host, DATA(host->data_offset)); |
34b664a2 | 1519 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
1520 | } |
1521 | } | |
1522 | ||
1523 | static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt) | |
1524 | { | |
cfbeb59c MC |
1525 | struct mmc_data *data = host->data; |
1526 | int init_cnt = cnt; | |
1527 | ||
34b664a2 JH |
1528 | /* try and push anything in the part_buf */ |
1529 | if (unlikely(host->part_buf_count)) { | |
1530 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1531 | buf += len; | |
1532 | cnt -= len; | |
cfbeb59c | 1533 | if (host->part_buf_count == 4) { |
4e0a5adf JC |
1534 | mci_writel(host, DATA(host->data_offset), |
1535 | host->part_buf32); | |
34b664a2 JH |
1536 | host->part_buf_count = 0; |
1537 | } | |
1538 | } | |
1539 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1540 | if (unlikely((unsigned long)buf & 0x3)) { | |
1541 | while (cnt >= 4) { | |
1542 | u32 aligned_buf[32]; | |
1543 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
1544 | int items = len >> 2; | |
1545 | int i; | |
1546 | /* memcpy from input buffer into aligned buffer */ | |
1547 | memcpy(aligned_buf, buf, len); | |
1548 | buf += len; | |
1549 | cnt -= len; | |
1550 | /* push data from aligned buffer into fifo */ | |
1551 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1552 | mci_writel(host, DATA(host->data_offset), |
1553 | aligned_buf[i]); | |
34b664a2 JH |
1554 | } |
1555 | } else | |
1556 | #endif | |
1557 | { | |
1558 | u32 *pdata = buf; | |
1559 | for (; cnt >= 4; cnt -= 4) | |
4e0a5adf | 1560 | mci_writel(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1561 | buf = pdata; |
1562 | } | |
1563 | /* put anything remaining in the part_buf */ | |
1564 | if (cnt) { | |
1565 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
1566 | /* Push data if we have reached the expected data length */ |
1567 | if ((data->bytes_xfered + init_cnt) == | |
1568 | (data->blksz * data->blocks)) | |
4e0a5adf | 1569 | mci_writel(host, DATA(host->data_offset), |
cfbeb59c | 1570 | host->part_buf32); |
f95f3850 WN |
1571 | } |
1572 | } | |
1573 | ||
1574 | static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt) | |
1575 | { | |
34b664a2 JH |
1576 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
1577 | if (unlikely((unsigned long)buf & 0x3)) { | |
1578 | while (cnt >= 4) { | |
1579 | /* pull data from fifo into aligned buffer */ | |
1580 | u32 aligned_buf[32]; | |
1581 | int len = min(cnt & -4, (int)sizeof(aligned_buf)); | |
1582 | int items = len >> 2; | |
1583 | int i; | |
1584 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1585 | aligned_buf[i] = mci_readl(host, |
1586 | DATA(host->data_offset)); | |
34b664a2 JH |
1587 | /* memcpy from aligned buffer into output buffer */ |
1588 | memcpy(buf, aligned_buf, len); | |
1589 | buf += len; | |
1590 | cnt -= len; | |
1591 | } | |
1592 | } else | |
1593 | #endif | |
1594 | { | |
1595 | u32 *pdata = buf; | |
1596 | for (; cnt >= 4; cnt -= 4) | |
4e0a5adf | 1597 | *pdata++ = mci_readl(host, DATA(host->data_offset)); |
34b664a2 JH |
1598 | buf = pdata; |
1599 | } | |
1600 | if (cnt) { | |
4e0a5adf | 1601 | host->part_buf32 = mci_readl(host, DATA(host->data_offset)); |
34b664a2 | 1602 | dw_mci_pull_final_bytes(host, buf, cnt); |
f95f3850 WN |
1603 | } |
1604 | } | |
1605 | ||
1606 | static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt) | |
1607 | { | |
cfbeb59c MC |
1608 | struct mmc_data *data = host->data; |
1609 | int init_cnt = cnt; | |
1610 | ||
34b664a2 JH |
1611 | /* try and push anything in the part_buf */ |
1612 | if (unlikely(host->part_buf_count)) { | |
1613 | int len = dw_mci_push_part_bytes(host, buf, cnt); | |
1614 | buf += len; | |
1615 | cnt -= len; | |
c09fbd74 | 1616 | |
cfbeb59c | 1617 | if (host->part_buf_count == 8) { |
c09fbd74 | 1618 | mci_writeq(host, DATA(host->data_offset), |
4e0a5adf | 1619 | host->part_buf); |
34b664a2 JH |
1620 | host->part_buf_count = 0; |
1621 | } | |
1622 | } | |
1623 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS | |
1624 | if (unlikely((unsigned long)buf & 0x7)) { | |
1625 | while (cnt >= 8) { | |
1626 | u64 aligned_buf[16]; | |
1627 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
1628 | int items = len >> 3; | |
1629 | int i; | |
1630 | /* memcpy from input buffer into aligned buffer */ | |
1631 | memcpy(aligned_buf, buf, len); | |
1632 | buf += len; | |
1633 | cnt -= len; | |
1634 | /* push data from aligned buffer into fifo */ | |
1635 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1636 | mci_writeq(host, DATA(host->data_offset), |
1637 | aligned_buf[i]); | |
34b664a2 JH |
1638 | } |
1639 | } else | |
1640 | #endif | |
1641 | { | |
1642 | u64 *pdata = buf; | |
1643 | for (; cnt >= 8; cnt -= 8) | |
4e0a5adf | 1644 | mci_writeq(host, DATA(host->data_offset), *pdata++); |
34b664a2 JH |
1645 | buf = pdata; |
1646 | } | |
1647 | /* put anything remaining in the part_buf */ | |
1648 | if (cnt) { | |
1649 | dw_mci_set_part_bytes(host, buf, cnt); | |
cfbeb59c MC |
1650 | /* Push data if we have reached the expected data length */ |
1651 | if ((data->bytes_xfered + init_cnt) == | |
1652 | (data->blksz * data->blocks)) | |
4e0a5adf | 1653 | mci_writeq(host, DATA(host->data_offset), |
cfbeb59c | 1654 | host->part_buf); |
f95f3850 WN |
1655 | } |
1656 | } | |
1657 | ||
1658 | static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt) | |
1659 | { | |
34b664a2 JH |
1660 | #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
1661 | if (unlikely((unsigned long)buf & 0x7)) { | |
1662 | while (cnt >= 8) { | |
1663 | /* pull data from fifo into aligned buffer */ | |
1664 | u64 aligned_buf[16]; | |
1665 | int len = min(cnt & -8, (int)sizeof(aligned_buf)); | |
1666 | int items = len >> 3; | |
1667 | int i; | |
1668 | for (i = 0; i < items; ++i) | |
4e0a5adf JC |
1669 | aligned_buf[i] = mci_readq(host, |
1670 | DATA(host->data_offset)); | |
34b664a2 JH |
1671 | /* memcpy from aligned buffer into output buffer */ |
1672 | memcpy(buf, aligned_buf, len); | |
1673 | buf += len; | |
1674 | cnt -= len; | |
1675 | } | |
1676 | } else | |
1677 | #endif | |
1678 | { | |
1679 | u64 *pdata = buf; | |
1680 | for (; cnt >= 8; cnt -= 8) | |
4e0a5adf | 1681 | *pdata++ = mci_readq(host, DATA(host->data_offset)); |
34b664a2 JH |
1682 | buf = pdata; |
1683 | } | |
1684 | if (cnt) { | |
4e0a5adf | 1685 | host->part_buf = mci_readq(host, DATA(host->data_offset)); |
34b664a2 JH |
1686 | dw_mci_pull_final_bytes(host, buf, cnt); |
1687 | } | |
1688 | } | |
f95f3850 | 1689 | |
34b664a2 JH |
1690 | static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt) |
1691 | { | |
1692 | int len; | |
f95f3850 | 1693 | |
34b664a2 JH |
1694 | /* get remaining partial bytes */ |
1695 | len = dw_mci_pull_part_bytes(host, buf, cnt); | |
1696 | if (unlikely(len == cnt)) | |
1697 | return; | |
1698 | buf += len; | |
1699 | cnt -= len; | |
1700 | ||
1701 | /* get the rest of the data */ | |
1702 | host->pull_data(host, buf, cnt); | |
f95f3850 WN |
1703 | } |
1704 | ||
87a74d39 | 1705 | static void dw_mci_read_data_pio(struct dw_mci *host, bool dto) |
f95f3850 | 1706 | { |
f9c2a0dc SJ |
1707 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
1708 | void *buf; | |
1709 | unsigned int offset; | |
f95f3850 WN |
1710 | struct mmc_data *data = host->data; |
1711 | int shift = host->data_shift; | |
1712 | u32 status; | |
3e4b0d8b | 1713 | unsigned int len; |
f9c2a0dc | 1714 | unsigned int remain, fcnt; |
f95f3850 WN |
1715 | |
1716 | do { | |
f9c2a0dc SJ |
1717 | if (!sg_miter_next(sg_miter)) |
1718 | goto done; | |
1719 | ||
4225fc85 | 1720 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
1721 | buf = sg_miter->addr; |
1722 | remain = sg_miter->length; | |
1723 | offset = 0; | |
1724 | ||
1725 | do { | |
1726 | fcnt = (SDMMC_GET_FCNT(mci_readl(host, STATUS)) | |
1727 | << shift) + host->part_buf_count; | |
1728 | len = min(remain, fcnt); | |
1729 | if (!len) | |
1730 | break; | |
34b664a2 | 1731 | dw_mci_pull_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 1732 | data->bytes_xfered += len; |
f95f3850 | 1733 | offset += len; |
f9c2a0dc SJ |
1734 | remain -= len; |
1735 | } while (remain); | |
f95f3850 | 1736 | |
e74f3a9c | 1737 | sg_miter->consumed = offset; |
f95f3850 WN |
1738 | status = mci_readl(host, MINTSTS); |
1739 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
87a74d39 KK |
1740 | /* if the RXDR is ready read again */ |
1741 | } while ((status & SDMMC_INT_RXDR) || | |
1742 | (dto && SDMMC_GET_FCNT(mci_readl(host, STATUS)))); | |
f9c2a0dc SJ |
1743 | |
1744 | if (!remain) { | |
1745 | if (!sg_miter_next(sg_miter)) | |
1746 | goto done; | |
1747 | sg_miter->consumed = 0; | |
1748 | } | |
1749 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
1750 | return; |
1751 | ||
1752 | done: | |
f9c2a0dc SJ |
1753 | sg_miter_stop(sg_miter); |
1754 | host->sg = NULL; | |
f95f3850 WN |
1755 | smp_wmb(); |
1756 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
1757 | } | |
1758 | ||
1759 | static void dw_mci_write_data_pio(struct dw_mci *host) | |
1760 | { | |
f9c2a0dc SJ |
1761 | struct sg_mapping_iter *sg_miter = &host->sg_miter; |
1762 | void *buf; | |
1763 | unsigned int offset; | |
f95f3850 WN |
1764 | struct mmc_data *data = host->data; |
1765 | int shift = host->data_shift; | |
1766 | u32 status; | |
3e4b0d8b | 1767 | unsigned int len; |
f9c2a0dc SJ |
1768 | unsigned int fifo_depth = host->fifo_depth; |
1769 | unsigned int remain, fcnt; | |
f95f3850 WN |
1770 | |
1771 | do { | |
f9c2a0dc SJ |
1772 | if (!sg_miter_next(sg_miter)) |
1773 | goto done; | |
1774 | ||
4225fc85 | 1775 | host->sg = sg_miter->piter.sg; |
f9c2a0dc SJ |
1776 | buf = sg_miter->addr; |
1777 | remain = sg_miter->length; | |
1778 | offset = 0; | |
1779 | ||
1780 | do { | |
1781 | fcnt = ((fifo_depth - | |
1782 | SDMMC_GET_FCNT(mci_readl(host, STATUS))) | |
1783 | << shift) - host->part_buf_count; | |
1784 | len = min(remain, fcnt); | |
1785 | if (!len) | |
1786 | break; | |
f95f3850 | 1787 | host->push_data(host, (void *)(buf + offset), len); |
3e4b0d8b | 1788 | data->bytes_xfered += len; |
f95f3850 | 1789 | offset += len; |
f9c2a0dc SJ |
1790 | remain -= len; |
1791 | } while (remain); | |
f95f3850 | 1792 | |
e74f3a9c | 1793 | sg_miter->consumed = offset; |
f95f3850 WN |
1794 | status = mci_readl(host, MINTSTS); |
1795 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
f95f3850 | 1796 | } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ |
f9c2a0dc SJ |
1797 | |
1798 | if (!remain) { | |
1799 | if (!sg_miter_next(sg_miter)) | |
1800 | goto done; | |
1801 | sg_miter->consumed = 0; | |
1802 | } | |
1803 | sg_miter_stop(sg_miter); | |
f95f3850 WN |
1804 | return; |
1805 | ||
1806 | done: | |
f9c2a0dc SJ |
1807 | sg_miter_stop(sg_miter); |
1808 | host->sg = NULL; | |
f95f3850 WN |
1809 | smp_wmb(); |
1810 | set_bit(EVENT_XFER_COMPLETE, &host->pending_events); | |
1811 | } | |
1812 | ||
1813 | static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) | |
1814 | { | |
1815 | if (!host->cmd_status) | |
1816 | host->cmd_status = status; | |
1817 | ||
1818 | smp_wmb(); | |
1819 | ||
1820 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
1821 | tasklet_schedule(&host->tasklet); | |
1822 | } | |
1823 | ||
1824 | static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) | |
1825 | { | |
1826 | struct dw_mci *host = dev_id; | |
182c9081 | 1827 | u32 pending; |
1a5c8e1f | 1828 | int i; |
f95f3850 | 1829 | |
1fb5f68a MC |
1830 | pending = mci_readl(host, MINTSTS); /* read-only mask reg */ |
1831 | ||
476d79f1 DA |
1832 | /* |
1833 | * DTO fix - version 2.10a and below, and only if internal DMA | |
1834 | * is configured. | |
1835 | */ | |
1836 | if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) { | |
1837 | if (!pending && | |
1838 | ((mci_readl(host, STATUS) >> 17) & 0x1fff)) | |
1839 | pending |= SDMMC_INT_DATA_OVER; | |
1840 | } | |
f95f3850 | 1841 | |
476d79f1 | 1842 | if (pending) { |
f95f3850 WN |
1843 | if (pending & DW_MCI_CMD_ERROR_FLAGS) { |
1844 | mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); | |
182c9081 | 1845 | host->cmd_status = pending; |
f95f3850 WN |
1846 | smp_wmb(); |
1847 | set_bit(EVENT_CMD_COMPLETE, &host->pending_events); | |
f95f3850 WN |
1848 | } |
1849 | ||
1850 | if (pending & DW_MCI_DATA_ERROR_FLAGS) { | |
1851 | /* if there is an error report DATA_ERROR */ | |
1852 | mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); | |
182c9081 | 1853 | host->data_status = pending; |
f95f3850 WN |
1854 | smp_wmb(); |
1855 | set_bit(EVENT_DATA_ERROR, &host->pending_events); | |
9b2026a1 | 1856 | tasklet_schedule(&host->tasklet); |
f95f3850 WN |
1857 | } |
1858 | ||
1859 | if (pending & SDMMC_INT_DATA_OVER) { | |
1860 | mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); | |
1861 | if (!host->data_status) | |
182c9081 | 1862 | host->data_status = pending; |
f95f3850 WN |
1863 | smp_wmb(); |
1864 | if (host->dir_status == DW_MCI_RECV_STATUS) { | |
1865 | if (host->sg != NULL) | |
87a74d39 | 1866 | dw_mci_read_data_pio(host, true); |
f95f3850 WN |
1867 | } |
1868 | set_bit(EVENT_DATA_COMPLETE, &host->pending_events); | |
1869 | tasklet_schedule(&host->tasklet); | |
1870 | } | |
1871 | ||
1872 | if (pending & SDMMC_INT_RXDR) { | |
1873 | mci_writel(host, RINTSTS, SDMMC_INT_RXDR); | |
b40af3aa | 1874 | if (host->dir_status == DW_MCI_RECV_STATUS && host->sg) |
87a74d39 | 1875 | dw_mci_read_data_pio(host, false); |
f95f3850 WN |
1876 | } |
1877 | ||
1878 | if (pending & SDMMC_INT_TXDR) { | |
1879 | mci_writel(host, RINTSTS, SDMMC_INT_TXDR); | |
b40af3aa | 1880 | if (host->dir_status == DW_MCI_SEND_STATUS && host->sg) |
f95f3850 WN |
1881 | dw_mci_write_data_pio(host); |
1882 | } | |
1883 | ||
1884 | if (pending & SDMMC_INT_CMD_DONE) { | |
1885 | mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); | |
182c9081 | 1886 | dw_mci_cmd_interrupt(host, pending); |
f95f3850 WN |
1887 | } |
1888 | ||
1889 | if (pending & SDMMC_INT_CD) { | |
1890 | mci_writel(host, RINTSTS, SDMMC_INT_CD); | |
95dcc2cb | 1891 | queue_work(host->card_workqueue, &host->card_work); |
f95f3850 WN |
1892 | } |
1893 | ||
1a5c8e1f SH |
1894 | /* Handle SDIO Interrupts */ |
1895 | for (i = 0; i < host->num_slots; i++) { | |
1896 | struct dw_mci_slot *slot = host->slot[i]; | |
1897 | if (pending & SDMMC_INT_SDIO(i)) { | |
1898 | mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i)); | |
1899 | mmc_signal_sdio_irq(slot->mmc); | |
1900 | } | |
1901 | } | |
1902 | ||
1fb5f68a | 1903 | } |
f95f3850 WN |
1904 | |
1905 | #ifdef CONFIG_MMC_DW_IDMAC | |
1906 | /* Handle DMA interrupts */ | |
1907 | pending = mci_readl(host, IDSTS); | |
1908 | if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) { | |
1909 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI); | |
1910 | mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI); | |
f95f3850 WN |
1911 | host->dma_ops->complete(host); |
1912 | } | |
1913 | #endif | |
1914 | ||
1915 | return IRQ_HANDLED; | |
1916 | } | |
1917 | ||
1791b13e | 1918 | static void dw_mci_work_routine_card(struct work_struct *work) |
f95f3850 | 1919 | { |
1791b13e | 1920 | struct dw_mci *host = container_of(work, struct dw_mci, card_work); |
f95f3850 WN |
1921 | int i; |
1922 | ||
1923 | for (i = 0; i < host->num_slots; i++) { | |
1924 | struct dw_mci_slot *slot = host->slot[i]; | |
1925 | struct mmc_host *mmc = slot->mmc; | |
1926 | struct mmc_request *mrq; | |
1927 | int present; | |
f95f3850 WN |
1928 | |
1929 | present = dw_mci_get_cd(mmc); | |
1930 | while (present != slot->last_detect_state) { | |
f95f3850 WN |
1931 | dev_dbg(&slot->mmc->class_dev, "card %s\n", |
1932 | present ? "inserted" : "removed"); | |
1933 | ||
1791b13e JH |
1934 | spin_lock_bh(&host->lock); |
1935 | ||
f95f3850 WN |
1936 | /* Card change detected */ |
1937 | slot->last_detect_state = present; | |
1938 | ||
f95f3850 WN |
1939 | /* Clean up queue if present */ |
1940 | mrq = slot->mrq; | |
1941 | if (mrq) { | |
1942 | if (mrq == host->mrq) { | |
1943 | host->data = NULL; | |
1944 | host->cmd = NULL; | |
1945 | ||
1946 | switch (host->state) { | |
1947 | case STATE_IDLE: | |
1948 | break; | |
1949 | case STATE_SENDING_CMD: | |
1950 | mrq->cmd->error = -ENOMEDIUM; | |
1951 | if (!mrq->data) | |
1952 | break; | |
1953 | /* fall through */ | |
1954 | case STATE_SENDING_DATA: | |
1955 | mrq->data->error = -ENOMEDIUM; | |
1956 | dw_mci_stop_dma(host); | |
1957 | break; | |
1958 | case STATE_DATA_BUSY: | |
1959 | case STATE_DATA_ERROR: | |
1960 | if (mrq->data->error == -EINPROGRESS) | |
1961 | mrq->data->error = -ENOMEDIUM; | |
f95f3850 WN |
1962 | /* fall through */ |
1963 | case STATE_SENDING_STOP: | |
90c2143a SJ |
1964 | if (mrq->stop) |
1965 | mrq->stop->error = -ENOMEDIUM; | |
f95f3850 WN |
1966 | break; |
1967 | } | |
1968 | ||
1969 | dw_mci_request_end(host, mrq); | |
1970 | } else { | |
1971 | list_del(&slot->queue_node); | |
1972 | mrq->cmd->error = -ENOMEDIUM; | |
1973 | if (mrq->data) | |
1974 | mrq->data->error = -ENOMEDIUM; | |
1975 | if (mrq->stop) | |
1976 | mrq->stop->error = -ENOMEDIUM; | |
1977 | ||
1978 | spin_unlock(&host->lock); | |
1979 | mmc_request_done(slot->mmc, mrq); | |
1980 | spin_lock(&host->lock); | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | /* Power down slot */ | |
1985 | if (present == 0) { | |
31bff450 SJ |
1986 | /* Clear down the FIFO */ |
1987 | dw_mci_fifo_reset(host); | |
f95f3850 | 1988 | #ifdef CONFIG_MMC_DW_IDMAC |
5ce9d961 | 1989 | dw_mci_idmac_reset(host); |
f95f3850 WN |
1990 | #endif |
1991 | ||
1992 | } | |
1993 | ||
1791b13e JH |
1994 | spin_unlock_bh(&host->lock); |
1995 | ||
f95f3850 WN |
1996 | present = dw_mci_get_cd(mmc); |
1997 | } | |
1998 | ||
1999 | mmc_detect_change(slot->mmc, | |
2000 | msecs_to_jiffies(host->pdata->detect_delay_ms)); | |
2001 | } | |
2002 | } | |
2003 | ||
c91eab4b TA |
2004 | #ifdef CONFIG_OF |
2005 | /* given a slot id, find out the device node representing that slot */ | |
2006 | static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) | |
2007 | { | |
2008 | struct device_node *np; | |
2009 | const __be32 *addr; | |
2010 | int len; | |
2011 | ||
2012 | if (!dev || !dev->of_node) | |
2013 | return NULL; | |
2014 | ||
2015 | for_each_child_of_node(dev->of_node, np) { | |
2016 | addr = of_get_property(np, "reg", &len); | |
2017 | if (!addr || (len < sizeof(int))) | |
2018 | continue; | |
2019 | if (be32_to_cpup(addr) == slot) | |
2020 | return np; | |
2021 | } | |
2022 | return NULL; | |
2023 | } | |
2024 | ||
a70aaa64 DA |
2025 | static struct dw_mci_of_slot_quirks { |
2026 | char *quirk; | |
2027 | int id; | |
2028 | } of_slot_quirks[] = { | |
2029 | { | |
2030 | .quirk = "disable-wp", | |
2031 | .id = DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT, | |
2032 | }, | |
2033 | }; | |
2034 | ||
2035 | static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) | |
2036 | { | |
2037 | struct device_node *np = dw_mci_of_find_slot_node(dev, slot); | |
2038 | int quirks = 0; | |
2039 | int idx; | |
2040 | ||
2041 | /* get quirks */ | |
2042 | for (idx = 0; idx < ARRAY_SIZE(of_slot_quirks); idx++) | |
2043 | if (of_get_property(np, of_slot_quirks[idx].quirk, NULL)) | |
2044 | quirks |= of_slot_quirks[idx].id; | |
2045 | ||
2046 | return quirks; | |
2047 | } | |
2048 | ||
55a6ceb2 DA |
2049 | /* find the write protect gpio for a given slot; or -1 if none specified */ |
2050 | static int dw_mci_of_get_wp_gpio(struct device *dev, u8 slot) | |
2051 | { | |
2052 | struct device_node *np = dw_mci_of_find_slot_node(dev, slot); | |
2053 | int gpio; | |
2054 | ||
2055 | if (!np) | |
2056 | return -EINVAL; | |
2057 | ||
2058 | gpio = of_get_named_gpio(np, "wp-gpios", 0); | |
2059 | ||
2060 | /* Having a missing entry is valid; return silently */ | |
2061 | if (!gpio_is_valid(gpio)) | |
2062 | return -EINVAL; | |
2063 | ||
2064 | if (devm_gpio_request(dev, gpio, "dw-mci-wp")) { | |
2065 | dev_warn(dev, "gpio [%d] request failed\n", gpio); | |
2066 | return -EINVAL; | |
2067 | } | |
2068 | ||
2069 | return gpio; | |
2070 | } | |
bf626e55 | 2071 | |
7cf347bd | 2072 | /* find the cd gpio for a given slot */ |
bf626e55 ZG |
2073 | static void dw_mci_of_get_cd_gpio(struct device *dev, u8 slot, |
2074 | struct mmc_host *mmc) | |
2075 | { | |
2076 | struct device_node *np = dw_mci_of_find_slot_node(dev, slot); | |
2077 | int gpio; | |
2078 | ||
2079 | if (!np) | |
2080 | return; | |
2081 | ||
2082 | gpio = of_get_named_gpio(np, "cd-gpios", 0); | |
2083 | ||
2084 | /* Having a missing entry is valid; return silently */ | |
2085 | if (!gpio_is_valid(gpio)) | |
2086 | return; | |
2087 | ||
2088 | if (mmc_gpio_request_cd(mmc, gpio, 0)) | |
2089 | dev_warn(dev, "gpio [%d] request failed\n", gpio); | |
2090 | } | |
c91eab4b | 2091 | #else /* CONFIG_OF */ |
a70aaa64 DA |
2092 | static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) |
2093 | { | |
2094 | return 0; | |
2095 | } | |
c91eab4b TA |
2096 | static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) |
2097 | { | |
2098 | return NULL; | |
2099 | } | |
55a6ceb2 DA |
2100 | static int dw_mci_of_get_wp_gpio(struct device *dev, u8 slot) |
2101 | { | |
2102 | return -EINVAL; | |
2103 | } | |
bf626e55 ZG |
2104 | static void dw_mci_of_get_cd_gpio(struct device *dev, u8 slot, |
2105 | struct mmc_host *mmc) | |
2106 | { | |
2107 | return; | |
2108 | } | |
c91eab4b TA |
2109 | #endif /* CONFIG_OF */ |
2110 | ||
36c179a9 | 2111 | static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) |
f95f3850 WN |
2112 | { |
2113 | struct mmc_host *mmc; | |
2114 | struct dw_mci_slot *slot; | |
e95baf13 | 2115 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2116 | int ctrl_id, ret; |
1f44a2a5 | 2117 | u32 freq[2]; |
f95f3850 | 2118 | |
4a90920c | 2119 | mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev); |
f95f3850 WN |
2120 | if (!mmc) |
2121 | return -ENOMEM; | |
2122 | ||
2123 | slot = mmc_priv(mmc); | |
2124 | slot->id = id; | |
2125 | slot->mmc = mmc; | |
2126 | slot->host = host; | |
c91eab4b | 2127 | host->slot[id] = slot; |
f95f3850 | 2128 | |
a70aaa64 DA |
2129 | slot->quirks = dw_mci_of_get_slot_quirks(host->dev, slot->id); |
2130 | ||
f95f3850 | 2131 | mmc->ops = &dw_mci_ops; |
1f44a2a5 SJ |
2132 | if (of_property_read_u32_array(host->dev->of_node, |
2133 | "clock-freq-min-max", freq, 2)) { | |
2134 | mmc->f_min = DW_MCI_FREQ_MIN; | |
2135 | mmc->f_max = DW_MCI_FREQ_MAX; | |
2136 | } else { | |
2137 | mmc->f_min = freq[0]; | |
2138 | mmc->f_max = freq[1]; | |
2139 | } | |
f95f3850 WN |
2140 | |
2141 | if (host->pdata->get_ocr) | |
2142 | mmc->ocr_avail = host->pdata->get_ocr(id); | |
2143 | else | |
2144 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
2145 | ||
2146 | /* | |
2147 | * Start with slot power disabled, it will be enabled when a card | |
2148 | * is detected. | |
2149 | */ | |
2150 | if (host->pdata->setpower) | |
2151 | host->pdata->setpower(id, 0); | |
2152 | ||
fc3d7720 JC |
2153 | if (host->pdata->caps) |
2154 | mmc->caps = host->pdata->caps; | |
fc3d7720 | 2155 | |
ab269128 AK |
2156 | if (host->pdata->pm_caps) |
2157 | mmc->pm_caps = host->pdata->pm_caps; | |
2158 | ||
800d78bf TA |
2159 | if (host->dev->of_node) { |
2160 | ctrl_id = of_alias_get_id(host->dev->of_node, "mshc"); | |
2161 | if (ctrl_id < 0) | |
2162 | ctrl_id = 0; | |
2163 | } else { | |
2164 | ctrl_id = to_platform_device(host->dev)->id; | |
2165 | } | |
cb27a843 JH |
2166 | if (drv_data && drv_data->caps) |
2167 | mmc->caps |= drv_data->caps[ctrl_id]; | |
800d78bf | 2168 | |
4f408cc6 SJ |
2169 | if (host->pdata->caps2) |
2170 | mmc->caps2 = host->pdata->caps2; | |
4f408cc6 | 2171 | |
d8a4fb0e | 2172 | mmc_of_parse(mmc); |
f95f3850 | 2173 | |
f95f3850 WN |
2174 | if (host->pdata->blk_settings) { |
2175 | mmc->max_segs = host->pdata->blk_settings->max_segs; | |
2176 | mmc->max_blk_size = host->pdata->blk_settings->max_blk_size; | |
2177 | mmc->max_blk_count = host->pdata->blk_settings->max_blk_count; | |
2178 | mmc->max_req_size = host->pdata->blk_settings->max_req_size; | |
2179 | mmc->max_seg_size = host->pdata->blk_settings->max_seg_size; | |
2180 | } else { | |
2181 | /* Useful defaults if platform data is unset. */ | |
a39e5746 JC |
2182 | #ifdef CONFIG_MMC_DW_IDMAC |
2183 | mmc->max_segs = host->ring_size; | |
2184 | mmc->max_blk_size = 65536; | |
2185 | mmc->max_blk_count = host->ring_size; | |
2186 | mmc->max_seg_size = 0x1000; | |
2187 | mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count; | |
2188 | #else | |
f95f3850 WN |
2189 | mmc->max_segs = 64; |
2190 | mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */ | |
2191 | mmc->max_blk_count = 512; | |
2192 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
2193 | mmc->max_seg_size = mmc->max_req_size; | |
f95f3850 | 2194 | #endif /* CONFIG_MMC_DW_IDMAC */ |
a39e5746 | 2195 | } |
f95f3850 | 2196 | |
55a6ceb2 | 2197 | slot->wp_gpio = dw_mci_of_get_wp_gpio(host->dev, slot->id); |
bf626e55 | 2198 | dw_mci_of_get_cd_gpio(host->dev, slot->id, mmc); |
55a6ceb2 | 2199 | |
0cea529d JC |
2200 | ret = mmc_add_host(mmc); |
2201 | if (ret) | |
2202 | goto err_setup_bus; | |
f95f3850 WN |
2203 | |
2204 | #if defined(CONFIG_DEBUG_FS) | |
2205 | dw_mci_init_debugfs(slot); | |
2206 | #endif | |
2207 | ||
2208 | /* Card initially undetected */ | |
2209 | slot->last_detect_state = 0; | |
2210 | ||
2211 | return 0; | |
800d78bf TA |
2212 | |
2213 | err_setup_bus: | |
2214 | mmc_free_host(mmc); | |
2215 | return -EINVAL; | |
f95f3850 WN |
2216 | } |
2217 | ||
2218 | static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) | |
2219 | { | |
2220 | /* Shutdown detect IRQ */ | |
2221 | if (slot->host->pdata->exit) | |
2222 | slot->host->pdata->exit(id); | |
2223 | ||
2224 | /* Debugfs stuff is cleaned up by mmc core */ | |
2225 | mmc_remove_host(slot->mmc); | |
2226 | slot->host->slot[id] = NULL; | |
2227 | mmc_free_host(slot->mmc); | |
2228 | } | |
2229 | ||
2230 | static void dw_mci_init_dma(struct dw_mci *host) | |
2231 | { | |
2232 | /* Alloc memory for sg translation */ | |
780f22af | 2233 | host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE, |
f95f3850 WN |
2234 | &host->sg_dma, GFP_KERNEL); |
2235 | if (!host->sg_cpu) { | |
4a90920c | 2236 | dev_err(host->dev, "%s: could not alloc DMA memory\n", |
f95f3850 WN |
2237 | __func__); |
2238 | goto no_dma; | |
2239 | } | |
2240 | ||
2241 | /* Determine which DMA interface to use */ | |
2242 | #ifdef CONFIG_MMC_DW_IDMAC | |
2243 | host->dma_ops = &dw_mci_idmac_ops; | |
00956ea3 | 2244 | dev_info(host->dev, "Using internal DMA controller.\n"); |
f95f3850 WN |
2245 | #endif |
2246 | ||
2247 | if (!host->dma_ops) | |
2248 | goto no_dma; | |
2249 | ||
e1631f98 JC |
2250 | if (host->dma_ops->init && host->dma_ops->start && |
2251 | host->dma_ops->stop && host->dma_ops->cleanup) { | |
f95f3850 | 2252 | if (host->dma_ops->init(host)) { |
4a90920c | 2253 | dev_err(host->dev, "%s: Unable to initialize " |
f95f3850 WN |
2254 | "DMA Controller.\n", __func__); |
2255 | goto no_dma; | |
2256 | } | |
2257 | } else { | |
4a90920c | 2258 | dev_err(host->dev, "DMA initialization not found.\n"); |
f95f3850 WN |
2259 | goto no_dma; |
2260 | } | |
2261 | ||
2262 | host->use_dma = 1; | |
2263 | return; | |
2264 | ||
2265 | no_dma: | |
4a90920c | 2266 | dev_info(host->dev, "Using PIO mode.\n"); |
f95f3850 WN |
2267 | host->use_dma = 0; |
2268 | return; | |
2269 | } | |
2270 | ||
31bff450 | 2271 | static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) |
f95f3850 WN |
2272 | { |
2273 | unsigned long timeout = jiffies + msecs_to_jiffies(500); | |
31bff450 | 2274 | u32 ctrl; |
f95f3850 | 2275 | |
31bff450 SJ |
2276 | ctrl = mci_readl(host, CTRL); |
2277 | ctrl |= reset; | |
2278 | mci_writel(host, CTRL, ctrl); | |
f95f3850 WN |
2279 | |
2280 | /* wait till resets clear */ | |
2281 | do { | |
2282 | ctrl = mci_readl(host, CTRL); | |
31bff450 | 2283 | if (!(ctrl & reset)) |
f95f3850 WN |
2284 | return true; |
2285 | } while (time_before(jiffies, timeout)); | |
2286 | ||
31bff450 SJ |
2287 | dev_err(host->dev, |
2288 | "Timeout resetting block (ctrl reset %#x)\n", | |
2289 | ctrl & reset); | |
f95f3850 WN |
2290 | |
2291 | return false; | |
2292 | } | |
2293 | ||
31bff450 SJ |
2294 | static inline bool dw_mci_fifo_reset(struct dw_mci *host) |
2295 | { | |
2296 | /* | |
2297 | * Reseting generates a block interrupt, hence setting | |
2298 | * the scatter-gather pointer to NULL. | |
2299 | */ | |
2300 | if (host->sg) { | |
2301 | sg_miter_stop(&host->sg_miter); | |
2302 | host->sg = NULL; | |
2303 | } | |
2304 | ||
2305 | return dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET); | |
2306 | } | |
2307 | ||
2308 | static inline bool dw_mci_ctrl_all_reset(struct dw_mci *host) | |
2309 | { | |
2310 | return dw_mci_ctrl_reset(host, | |
2311 | SDMMC_CTRL_FIFO_RESET | | |
2312 | SDMMC_CTRL_RESET | | |
2313 | SDMMC_CTRL_DMA_RESET); | |
2314 | } | |
2315 | ||
c91eab4b TA |
2316 | #ifdef CONFIG_OF |
2317 | static struct dw_mci_of_quirks { | |
2318 | char *quirk; | |
2319 | int id; | |
2320 | } of_quirks[] = { | |
2321 | { | |
c91eab4b TA |
2322 | .quirk = "broken-cd", |
2323 | .id = DW_MCI_QUIRK_BROKEN_CARD_DETECTION, | |
2324 | }, | |
2325 | }; | |
2326 | ||
2327 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
2328 | { | |
2329 | struct dw_mci_board *pdata; | |
2330 | struct device *dev = host->dev; | |
2331 | struct device_node *np = dev->of_node; | |
e95baf13 | 2332 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
800d78bf | 2333 | int idx, ret; |
3c6d89ea | 2334 | u32 clock_frequency; |
c91eab4b TA |
2335 | |
2336 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
2337 | if (!pdata) { | |
2338 | dev_err(dev, "could not allocate memory for pdata\n"); | |
2339 | return ERR_PTR(-ENOMEM); | |
2340 | } | |
2341 | ||
2342 | /* find out number of slots supported */ | |
2343 | if (of_property_read_u32(dev->of_node, "num-slots", | |
2344 | &pdata->num_slots)) { | |
2345 | dev_info(dev, "num-slots property not found, " | |
2346 | "assuming 1 slot is available\n"); | |
2347 | pdata->num_slots = 1; | |
2348 | } | |
2349 | ||
2350 | /* get quirks */ | |
2351 | for (idx = 0; idx < ARRAY_SIZE(of_quirks); idx++) | |
2352 | if (of_get_property(np, of_quirks[idx].quirk, NULL)) | |
2353 | pdata->quirks |= of_quirks[idx].id; | |
2354 | ||
2355 | if (of_property_read_u32(np, "fifo-depth", &pdata->fifo_depth)) | |
2356 | dev_info(dev, "fifo-depth property not found, using " | |
2357 | "value of FIFOTH register as default\n"); | |
2358 | ||
2359 | of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); | |
2360 | ||
3c6d89ea DA |
2361 | if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) |
2362 | pdata->bus_hz = clock_frequency; | |
2363 | ||
cb27a843 JH |
2364 | if (drv_data && drv_data->parse_dt) { |
2365 | ret = drv_data->parse_dt(host); | |
800d78bf TA |
2366 | if (ret) |
2367 | return ERR_PTR(ret); | |
2368 | } | |
2369 | ||
10b49841 SJ |
2370 | if (of_find_property(np, "supports-highspeed", NULL)) |
2371 | pdata->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED; | |
2372 | ||
c91eab4b TA |
2373 | return pdata; |
2374 | } | |
2375 | ||
2376 | #else /* CONFIG_OF */ | |
2377 | static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) | |
2378 | { | |
2379 | return ERR_PTR(-EINVAL); | |
2380 | } | |
2381 | #endif /* CONFIG_OF */ | |
2382 | ||
62ca8034 | 2383 | int dw_mci_probe(struct dw_mci *host) |
f95f3850 | 2384 | { |
e95baf13 | 2385 | const struct dw_mci_drv_data *drv_data = host->drv_data; |
62ca8034 | 2386 | int width, i, ret = 0; |
f95f3850 | 2387 | u32 fifo_size; |
1c2215b7 | 2388 | int init_slots = 0; |
f95f3850 | 2389 | |
c91eab4b TA |
2390 | if (!host->pdata) { |
2391 | host->pdata = dw_mci_parse_dt(host); | |
2392 | if (IS_ERR(host->pdata)) { | |
2393 | dev_err(host->dev, "platform data not available\n"); | |
2394 | return -EINVAL; | |
2395 | } | |
f95f3850 WN |
2396 | } |
2397 | ||
62ca8034 | 2398 | if (!host->pdata->select_slot && host->pdata->num_slots > 1) { |
4a90920c | 2399 | dev_err(host->dev, |
f95f3850 | 2400 | "Platform data must supply select_slot function\n"); |
62ca8034 | 2401 | return -ENODEV; |
f95f3850 WN |
2402 | } |
2403 | ||
780f22af | 2404 | host->biu_clk = devm_clk_get(host->dev, "biu"); |
f90a0612 TA |
2405 | if (IS_ERR(host->biu_clk)) { |
2406 | dev_dbg(host->dev, "biu clock not available\n"); | |
2407 | } else { | |
2408 | ret = clk_prepare_enable(host->biu_clk); | |
2409 | if (ret) { | |
2410 | dev_err(host->dev, "failed to enable biu clock\n"); | |
f90a0612 TA |
2411 | return ret; |
2412 | } | |
2413 | } | |
2414 | ||
780f22af | 2415 | host->ciu_clk = devm_clk_get(host->dev, "ciu"); |
f90a0612 TA |
2416 | if (IS_ERR(host->ciu_clk)) { |
2417 | dev_dbg(host->dev, "ciu clock not available\n"); | |
3c6d89ea | 2418 | host->bus_hz = host->pdata->bus_hz; |
f90a0612 TA |
2419 | } else { |
2420 | ret = clk_prepare_enable(host->ciu_clk); | |
2421 | if (ret) { | |
2422 | dev_err(host->dev, "failed to enable ciu clock\n"); | |
f90a0612 TA |
2423 | goto err_clk_biu; |
2424 | } | |
f90a0612 | 2425 | |
3c6d89ea DA |
2426 | if (host->pdata->bus_hz) { |
2427 | ret = clk_set_rate(host->ciu_clk, host->pdata->bus_hz); | |
2428 | if (ret) | |
2429 | dev_warn(host->dev, | |
612de4c1 | 2430 | "Unable to set bus rate to %uHz\n", |
3c6d89ea DA |
2431 | host->pdata->bus_hz); |
2432 | } | |
f90a0612 | 2433 | host->bus_hz = clk_get_rate(host->ciu_clk); |
3c6d89ea | 2434 | } |
f90a0612 | 2435 | |
612de4c1 JC |
2436 | if (!host->bus_hz) { |
2437 | dev_err(host->dev, | |
2438 | "Platform data must supply bus speed\n"); | |
2439 | ret = -ENODEV; | |
2440 | goto err_clk_ciu; | |
2441 | } | |
2442 | ||
002f0d5c YK |
2443 | if (drv_data && drv_data->init) { |
2444 | ret = drv_data->init(host); | |
2445 | if (ret) { | |
2446 | dev_err(host->dev, | |
2447 | "implementation specific init failed\n"); | |
2448 | goto err_clk_ciu; | |
2449 | } | |
2450 | } | |
2451 | ||
cb27a843 JH |
2452 | if (drv_data && drv_data->setup_clock) { |
2453 | ret = drv_data->setup_clock(host); | |
800d78bf TA |
2454 | if (ret) { |
2455 | dev_err(host->dev, | |
2456 | "implementation specific clock setup failed\n"); | |
2457 | goto err_clk_ciu; | |
2458 | } | |
2459 | } | |
2460 | ||
a55d6ff0 | 2461 | host->vmmc = devm_regulator_get_optional(host->dev, "vmmc"); |
870556a3 DA |
2462 | if (IS_ERR(host->vmmc)) { |
2463 | ret = PTR_ERR(host->vmmc); | |
2464 | if (ret == -EPROBE_DEFER) | |
2465 | goto err_clk_ciu; | |
2466 | ||
2467 | dev_info(host->dev, "no vmmc regulator found: %d\n", ret); | |
2468 | host->vmmc = NULL; | |
2469 | } else { | |
2470 | ret = regulator_enable(host->vmmc); | |
2471 | if (ret) { | |
2472 | if (ret != -EPROBE_DEFER) | |
2473 | dev_err(host->dev, | |
2474 | "regulator_enable fail: %d\n", ret); | |
2475 | goto err_clk_ciu; | |
2476 | } | |
2477 | } | |
2478 | ||
62ca8034 | 2479 | host->quirks = host->pdata->quirks; |
f95f3850 WN |
2480 | |
2481 | spin_lock_init(&host->lock); | |
2482 | INIT_LIST_HEAD(&host->queue); | |
2483 | ||
f95f3850 WN |
2484 | /* |
2485 | * Get the host data width - this assumes that HCON has been set with | |
2486 | * the correct values. | |
2487 | */ | |
2488 | i = (mci_readl(host, HCON) >> 7) & 0x7; | |
2489 | if (!i) { | |
2490 | host->push_data = dw_mci_push_data16; | |
2491 | host->pull_data = dw_mci_pull_data16; | |
2492 | width = 16; | |
2493 | host->data_shift = 1; | |
2494 | } else if (i == 2) { | |
2495 | host->push_data = dw_mci_push_data64; | |
2496 | host->pull_data = dw_mci_pull_data64; | |
2497 | width = 64; | |
2498 | host->data_shift = 3; | |
2499 | } else { | |
2500 | /* Check for a reserved value, and warn if it is */ | |
2501 | WARN((i != 1), | |
2502 | "HCON reports a reserved host data width!\n" | |
2503 | "Defaulting to 32-bit access.\n"); | |
2504 | host->push_data = dw_mci_push_data32; | |
2505 | host->pull_data = dw_mci_pull_data32; | |
2506 | width = 32; | |
2507 | host->data_shift = 2; | |
2508 | } | |
2509 | ||
2510 | /* Reset all blocks */ | |
31bff450 | 2511 | if (!dw_mci_ctrl_all_reset(host)) |
141a712a SJ |
2512 | return -ENODEV; |
2513 | ||
2514 | host->dma_ops = host->pdata->dma_ops; | |
2515 | dw_mci_init_dma(host); | |
f95f3850 WN |
2516 | |
2517 | /* Clear the interrupts for the host controller */ | |
2518 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2519 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
2520 | ||
2521 | /* Put in max timeout */ | |
2522 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
2523 | ||
2524 | /* | |
2525 | * FIFO threshold settings RxMark = fifo_size / 2 - 1, | |
2526 | * Tx Mark = fifo_size / 2 DMA Size = 8 | |
2527 | */ | |
b86d8253 JH |
2528 | if (!host->pdata->fifo_depth) { |
2529 | /* | |
2530 | * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may | |
2531 | * have been overwritten by the bootloader, just like we're | |
2532 | * about to do, so if you know the value for your hardware, you | |
2533 | * should put it in the platform data. | |
2534 | */ | |
2535 | fifo_size = mci_readl(host, FIFOTH); | |
8234e869 | 2536 | fifo_size = 1 + ((fifo_size >> 16) & 0xfff); |
b86d8253 JH |
2537 | } else { |
2538 | fifo_size = host->pdata->fifo_depth; | |
2539 | } | |
2540 | host->fifo_depth = fifo_size; | |
52426899 SJ |
2541 | host->fifoth_val = |
2542 | SDMMC_SET_FIFOTH(0x2, fifo_size / 2 - 1, fifo_size / 2); | |
e61cf118 | 2543 | mci_writel(host, FIFOTH, host->fifoth_val); |
f95f3850 WN |
2544 | |
2545 | /* disable clock to CIU */ | |
2546 | mci_writel(host, CLKENA, 0); | |
2547 | mci_writel(host, CLKSRC, 0); | |
2548 | ||
63008768 JH |
2549 | /* |
2550 | * In 2.40a spec, Data offset is changed. | |
2551 | * Need to check the version-id and set data-offset for DATA register. | |
2552 | */ | |
2553 | host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); | |
2554 | dev_info(host->dev, "Version ID is %04x\n", host->verid); | |
2555 | ||
2556 | if (host->verid < DW_MMC_240A) | |
2557 | host->data_offset = DATA_OFFSET; | |
2558 | else | |
2559 | host->data_offset = DATA_240A_OFFSET; | |
2560 | ||
f95f3850 | 2561 | tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host); |
95dcc2cb | 2562 | host->card_workqueue = alloc_workqueue("dw-mci-card", |
59ff3eb6 | 2563 | WQ_MEM_RECLAIM, 1); |
ef7aef9a WY |
2564 | if (!host->card_workqueue) { |
2565 | ret = -ENOMEM; | |
1791b13e | 2566 | goto err_dmaunmap; |
ef7aef9a | 2567 | } |
1791b13e | 2568 | INIT_WORK(&host->card_work, dw_mci_work_routine_card); |
780f22af SJ |
2569 | ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt, |
2570 | host->irq_flags, "dw-mci", host); | |
f95f3850 | 2571 | if (ret) |
1791b13e | 2572 | goto err_workqueue; |
f95f3850 | 2573 | |
f95f3850 WN |
2574 | if (host->pdata->num_slots) |
2575 | host->num_slots = host->pdata->num_slots; | |
2576 | else | |
2577 | host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1; | |
2578 | ||
2da1d7f2 YC |
2579 | /* |
2580 | * Enable interrupts for command done, data over, data empty, card det, | |
2581 | * receive ready and error such as transmit, receive timeout, crc error | |
2582 | */ | |
2583 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2584 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
2585 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
2586 | DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); | |
2587 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */ | |
2588 | ||
2589 | dev_info(host->dev, "DW MMC controller at irq %d, " | |
2590 | "%d bit host data width, " | |
2591 | "%u deep fifo\n", | |
2592 | host->irq, width, fifo_size); | |
2593 | ||
f95f3850 WN |
2594 | /* We need at least one slot to succeed */ |
2595 | for (i = 0; i < host->num_slots; i++) { | |
2596 | ret = dw_mci_init_slot(host, i); | |
1c2215b7 TA |
2597 | if (ret) |
2598 | dev_dbg(host->dev, "slot %d init failed\n", i); | |
2599 | else | |
2600 | init_slots++; | |
2601 | } | |
2602 | ||
2603 | if (init_slots) { | |
2604 | dev_info(host->dev, "%d slots initialized\n", init_slots); | |
2605 | } else { | |
2606 | dev_dbg(host->dev, "attempted to initialize %d slots, " | |
2607 | "but failed on all\n", host->num_slots); | |
780f22af | 2608 | goto err_workqueue; |
f95f3850 WN |
2609 | } |
2610 | ||
f95f3850 | 2611 | if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) |
4a90920c | 2612 | dev_info(host->dev, "Internal DMAC interrupt fix enabled.\n"); |
f95f3850 WN |
2613 | |
2614 | return 0; | |
2615 | ||
1791b13e | 2616 | err_workqueue: |
95dcc2cb | 2617 | destroy_workqueue(host->card_workqueue); |
1791b13e | 2618 | |
f95f3850 WN |
2619 | err_dmaunmap: |
2620 | if (host->use_dma && host->dma_ops->exit) | |
2621 | host->dma_ops->exit(host); | |
780f22af | 2622 | if (host->vmmc) |
c07946a3 | 2623 | regulator_disable(host->vmmc); |
f90a0612 TA |
2624 | |
2625 | err_clk_ciu: | |
780f22af | 2626 | if (!IS_ERR(host->ciu_clk)) |
f90a0612 | 2627 | clk_disable_unprepare(host->ciu_clk); |
780f22af | 2628 | |
f90a0612 | 2629 | err_clk_biu: |
780f22af | 2630 | if (!IS_ERR(host->biu_clk)) |
f90a0612 | 2631 | clk_disable_unprepare(host->biu_clk); |
780f22af | 2632 | |
f95f3850 WN |
2633 | return ret; |
2634 | } | |
62ca8034 | 2635 | EXPORT_SYMBOL(dw_mci_probe); |
f95f3850 | 2636 | |
62ca8034 | 2637 | void dw_mci_remove(struct dw_mci *host) |
f95f3850 | 2638 | { |
f95f3850 WN |
2639 | int i; |
2640 | ||
2641 | mci_writel(host, RINTSTS, 0xFFFFFFFF); | |
2642 | mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */ | |
2643 | ||
f95f3850 | 2644 | for (i = 0; i < host->num_slots; i++) { |
4a90920c | 2645 | dev_dbg(host->dev, "remove slot %d\n", i); |
f95f3850 WN |
2646 | if (host->slot[i]) |
2647 | dw_mci_cleanup_slot(host->slot[i], i); | |
2648 | } | |
2649 | ||
2650 | /* disable clock to CIU */ | |
2651 | mci_writel(host, CLKENA, 0); | |
2652 | mci_writel(host, CLKSRC, 0); | |
2653 | ||
95dcc2cb | 2654 | destroy_workqueue(host->card_workqueue); |
f95f3850 WN |
2655 | |
2656 | if (host->use_dma && host->dma_ops->exit) | |
2657 | host->dma_ops->exit(host); | |
2658 | ||
780f22af | 2659 | if (host->vmmc) |
c07946a3 | 2660 | regulator_disable(host->vmmc); |
c07946a3 | 2661 | |
f90a0612 TA |
2662 | if (!IS_ERR(host->ciu_clk)) |
2663 | clk_disable_unprepare(host->ciu_clk); | |
780f22af | 2664 | |
f90a0612 TA |
2665 | if (!IS_ERR(host->biu_clk)) |
2666 | clk_disable_unprepare(host->biu_clk); | |
f95f3850 | 2667 | } |
62ca8034 SH |
2668 | EXPORT_SYMBOL(dw_mci_remove); |
2669 | ||
2670 | ||
f95f3850 | 2671 | |
6fe8890d | 2672 | #ifdef CONFIG_PM_SLEEP |
f95f3850 WN |
2673 | /* |
2674 | * TODO: we should probably disable the clock to the card in the suspend path. | |
2675 | */ | |
62ca8034 | 2676 | int dw_mci_suspend(struct dw_mci *host) |
f95f3850 | 2677 | { |
c07946a3 JC |
2678 | if (host->vmmc) |
2679 | regulator_disable(host->vmmc); | |
2680 | ||
f95f3850 WN |
2681 | return 0; |
2682 | } | |
62ca8034 | 2683 | EXPORT_SYMBOL(dw_mci_suspend); |
f95f3850 | 2684 | |
62ca8034 | 2685 | int dw_mci_resume(struct dw_mci *host) |
f95f3850 WN |
2686 | { |
2687 | int i, ret; | |
f95f3850 | 2688 | |
f2f942ce SK |
2689 | if (host->vmmc) { |
2690 | ret = regulator_enable(host->vmmc); | |
2691 | if (ret) { | |
2692 | dev_err(host->dev, | |
2693 | "failed to enable regulator: %d\n", ret); | |
2694 | return ret; | |
2695 | } | |
2696 | } | |
1d6c4e0a | 2697 | |
31bff450 | 2698 | if (!dw_mci_ctrl_all_reset(host)) { |
e61cf118 JC |
2699 | ret = -ENODEV; |
2700 | return ret; | |
2701 | } | |
2702 | ||
3bfe619d | 2703 | if (host->use_dma && host->dma_ops->init) |
141a712a SJ |
2704 | host->dma_ops->init(host); |
2705 | ||
52426899 SJ |
2706 | /* |
2707 | * Restore the initial value at FIFOTH register | |
2708 | * And Invalidate the prev_blksz with zero | |
2709 | */ | |
e61cf118 | 2710 | mci_writel(host, FIFOTH, host->fifoth_val); |
52426899 | 2711 | host->prev_blksz = 0; |
e61cf118 | 2712 | |
2eb2944f DA |
2713 | /* Put in max timeout */ |
2714 | mci_writel(host, TMOUT, 0xFFFFFFFF); | |
2715 | ||
e61cf118 JC |
2716 | mci_writel(host, RINTSTS, 0xFFFFFFFF); |
2717 | mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | | |
2718 | SDMMC_INT_TXDR | SDMMC_INT_RXDR | | |
2719 | DW_MCI_ERROR_FLAGS | SDMMC_INT_CD); | |
2720 | mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); | |
2721 | ||
f95f3850 WN |
2722 | for (i = 0; i < host->num_slots; i++) { |
2723 | struct dw_mci_slot *slot = host->slot[i]; | |
2724 | if (!slot) | |
2725 | continue; | |
ab269128 AK |
2726 | if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) { |
2727 | dw_mci_set_ios(slot->mmc, &slot->mmc->ios); | |
2728 | dw_mci_setup_bus(slot, true); | |
2729 | } | |
f95f3850 | 2730 | } |
f95f3850 WN |
2731 | return 0; |
2732 | } | |
62ca8034 | 2733 | EXPORT_SYMBOL(dw_mci_resume); |
6fe8890d JC |
2734 | #endif /* CONFIG_PM_SLEEP */ |
2735 | ||
f95f3850 WN |
2736 | static int __init dw_mci_init(void) |
2737 | { | |
8e1c4e4d | 2738 | pr_info("Synopsys Designware Multimedia Card Interface Driver\n"); |
62ca8034 | 2739 | return 0; |
f95f3850 WN |
2740 | } |
2741 | ||
2742 | static void __exit dw_mci_exit(void) | |
2743 | { | |
f95f3850 WN |
2744 | } |
2745 | ||
2746 | module_init(dw_mci_init); | |
2747 | module_exit(dw_mci_exit); | |
2748 | ||
2749 | MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); | |
2750 | MODULE_AUTHOR("NXP Semiconductor VietNam"); | |
2751 | MODULE_AUTHOR("Imagination Technologies Ltd"); | |
2752 | MODULE_LICENSE("GPL v2"); |