Commit | Line | Data |
---|---|---|
fdc50a94 YG |
1 | /* |
2 | * MMCIF eMMC driver. | |
3 | * | |
4 | * Copyright (C) 2010 Renesas Solutions Corp. | |
5 | * Yusuke Goda <yusuke.goda.sx@renesas.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License. | |
10 | * | |
11 | * | |
12 | * TODO | |
13 | * 1. DMA | |
14 | * 2. Power management | |
15 | * 3. Handle MMC errors better | |
16 | * | |
17 | */ | |
18 | ||
f985da17 GL |
19 | /* |
20 | * The MMCIF driver is now processing MMC requests asynchronously, according | |
21 | * to the Linux MMC API requirement. | |
22 | * | |
23 | * The MMCIF driver processes MMC requests in up to 3 stages: command, optional | |
24 | * data, and optional stop. To achieve asynchronous processing each of these | |
25 | * stages is split into two halves: a top and a bottom half. The top half | |
26 | * initialises the hardware, installs a timeout handler to handle completion | |
27 | * timeouts, and returns. In case of the command stage this immediately returns | |
28 | * control to the caller, leaving all further processing to run asynchronously. | |
29 | * All further request processing is performed by the bottom halves. | |
30 | * | |
31 | * The bottom half further consists of a "hard" IRQ handler, an IRQ handler | |
32 | * thread, a DMA completion callback, if DMA is used, a timeout work, and | |
33 | * request- and stage-specific handler methods. | |
34 | * | |
35 | * Each bottom half run begins with either a hardware interrupt, a DMA callback | |
36 | * invocation, or a timeout work run. In case of an error or a successful | |
37 | * processing completion, the MMC core is informed and the request processing is | |
38 | * finished. In case processing has to continue, i.e., if data has to be read | |
39 | * from or written to the card, or if a stop command has to be sent, the next | |
40 | * top half is called, which performs the necessary hardware handling and | |
41 | * reschedules the timeout work. This returns the driver state machine into the | |
42 | * bottom half waiting state. | |
43 | */ | |
44 | ||
86df1745 | 45 | #include <linux/bitops.h> |
aa0787a9 GL |
46 | #include <linux/clk.h> |
47 | #include <linux/completion.h> | |
e47bf32a | 48 | #include <linux/delay.h> |
fdc50a94 | 49 | #include <linux/dma-mapping.h> |
a782d688 | 50 | #include <linux/dmaengine.h> |
fdc50a94 YG |
51 | #include <linux/mmc/card.h> |
52 | #include <linux/mmc/core.h> | |
e47bf32a | 53 | #include <linux/mmc/host.h> |
fdc50a94 YG |
54 | #include <linux/mmc/mmc.h> |
55 | #include <linux/mmc/sdio.h> | |
fdc50a94 | 56 | #include <linux/mmc/sh_mmcif.h> |
e480606a | 57 | #include <linux/mmc/slot-gpio.h> |
bf68a812 | 58 | #include <linux/mod_devicetable.h> |
a782d688 | 59 | #include <linux/pagemap.h> |
e47bf32a | 60 | #include <linux/platform_device.h> |
efe6a8ad | 61 | #include <linux/pm_qos.h> |
faca6648 | 62 | #include <linux/pm_runtime.h> |
3b0beafc | 63 | #include <linux/spinlock.h> |
88b47679 | 64 | #include <linux/module.h> |
fdc50a94 YG |
65 | |
66 | #define DRIVER_NAME "sh_mmcif" | |
67 | #define DRIVER_VERSION "2010-04-28" | |
68 | ||
fdc50a94 YG |
69 | /* CE_CMD_SET */ |
70 | #define CMD_MASK 0x3f000000 | |
71 | #define CMD_SET_RTYP_NO ((0 << 23) | (0 << 22)) | |
72 | #define CMD_SET_RTYP_6B ((0 << 23) | (1 << 22)) /* R1/R1b/R3/R4/R5 */ | |
73 | #define CMD_SET_RTYP_17B ((1 << 23) | (0 << 22)) /* R2 */ | |
74 | #define CMD_SET_RBSY (1 << 21) /* R1b */ | |
75 | #define CMD_SET_CCSEN (1 << 20) | |
76 | #define CMD_SET_WDAT (1 << 19) /* 1: on data, 0: no data */ | |
77 | #define CMD_SET_DWEN (1 << 18) /* 1: write, 0: read */ | |
78 | #define CMD_SET_CMLTE (1 << 17) /* 1: multi block trans, 0: single */ | |
79 | #define CMD_SET_CMD12EN (1 << 16) /* 1: CMD12 auto issue */ | |
80 | #define CMD_SET_RIDXC_INDEX ((0 << 15) | (0 << 14)) /* index check */ | |
81 | #define CMD_SET_RIDXC_BITS ((0 << 15) | (1 << 14)) /* check bits check */ | |
82 | #define CMD_SET_RIDXC_NO ((1 << 15) | (0 << 14)) /* no check */ | |
83 | #define CMD_SET_CRC7C ((0 << 13) | (0 << 12)) /* CRC7 check*/ | |
84 | #define CMD_SET_CRC7C_BITS ((0 << 13) | (1 << 12)) /* check bits check*/ | |
85 | #define CMD_SET_CRC7C_INTERNAL ((1 << 13) | (0 << 12)) /* internal CRC7 check*/ | |
86 | #define CMD_SET_CRC16C (1 << 10) /* 0: CRC16 check*/ | |
87 | #define CMD_SET_CRCSTE (1 << 8) /* 1: not receive CRC status */ | |
88 | #define CMD_SET_TBIT (1 << 7) /* 1: tran mission bit "Low" */ | |
89 | #define CMD_SET_OPDM (1 << 6) /* 1: open/drain */ | |
90 | #define CMD_SET_CCSH (1 << 5) | |
555061f9 | 91 | #define CMD_SET_DARS (1 << 2) /* Dual Data Rate */ |
fdc50a94 YG |
92 | #define CMD_SET_DATW_1 ((0 << 1) | (0 << 0)) /* 1bit */ |
93 | #define CMD_SET_DATW_4 ((0 << 1) | (1 << 0)) /* 4bit */ | |
94 | #define CMD_SET_DATW_8 ((1 << 1) | (0 << 0)) /* 8bit */ | |
95 | ||
96 | /* CE_CMD_CTRL */ | |
97 | #define CMD_CTRL_BREAK (1 << 0) | |
98 | ||
99 | /* CE_BLOCK_SET */ | |
100 | #define BLOCK_SIZE_MASK 0x0000ffff | |
101 | ||
fdc50a94 YG |
102 | /* CE_INT */ |
103 | #define INT_CCSDE (1 << 29) | |
104 | #define INT_CMD12DRE (1 << 26) | |
105 | #define INT_CMD12RBE (1 << 25) | |
106 | #define INT_CMD12CRE (1 << 24) | |
107 | #define INT_DTRANE (1 << 23) | |
108 | #define INT_BUFRE (1 << 22) | |
109 | #define INT_BUFWEN (1 << 21) | |
110 | #define INT_BUFREN (1 << 20) | |
111 | #define INT_CCSRCV (1 << 19) | |
112 | #define INT_RBSYE (1 << 17) | |
113 | #define INT_CRSPE (1 << 16) | |
114 | #define INT_CMDVIO (1 << 15) | |
115 | #define INT_BUFVIO (1 << 14) | |
116 | #define INT_WDATERR (1 << 11) | |
117 | #define INT_RDATERR (1 << 10) | |
118 | #define INT_RIDXERR (1 << 9) | |
119 | #define INT_RSPERR (1 << 8) | |
120 | #define INT_CCSTO (1 << 5) | |
121 | #define INT_CRCSTO (1 << 4) | |
122 | #define INT_WDATTO (1 << 3) | |
123 | #define INT_RDATTO (1 << 2) | |
124 | #define INT_RBSYTO (1 << 1) | |
125 | #define INT_RSPTO (1 << 0) | |
126 | #define INT_ERR_STS (INT_CMDVIO | INT_BUFVIO | INT_WDATERR | \ | |
127 | INT_RDATERR | INT_RIDXERR | INT_RSPERR | \ | |
128 | INT_CCSTO | INT_CRCSTO | INT_WDATTO | \ | |
129 | INT_RDATTO | INT_RBSYTO | INT_RSPTO) | |
130 | ||
131 | /* CE_INT_MASK */ | |
132 | #define MASK_ALL 0x00000000 | |
133 | #define MASK_MCCSDE (1 << 29) | |
134 | #define MASK_MCMD12DRE (1 << 26) | |
135 | #define MASK_MCMD12RBE (1 << 25) | |
136 | #define MASK_MCMD12CRE (1 << 24) | |
137 | #define MASK_MDTRANE (1 << 23) | |
138 | #define MASK_MBUFRE (1 << 22) | |
139 | #define MASK_MBUFWEN (1 << 21) | |
140 | #define MASK_MBUFREN (1 << 20) | |
141 | #define MASK_MCCSRCV (1 << 19) | |
142 | #define MASK_MRBSYE (1 << 17) | |
143 | #define MASK_MCRSPE (1 << 16) | |
144 | #define MASK_MCMDVIO (1 << 15) | |
145 | #define MASK_MBUFVIO (1 << 14) | |
146 | #define MASK_MWDATERR (1 << 11) | |
147 | #define MASK_MRDATERR (1 << 10) | |
148 | #define MASK_MRIDXERR (1 << 9) | |
149 | #define MASK_MRSPERR (1 << 8) | |
150 | #define MASK_MCCSTO (1 << 5) | |
151 | #define MASK_MCRCSTO (1 << 4) | |
152 | #define MASK_MWDATTO (1 << 3) | |
153 | #define MASK_MRDATTO (1 << 2) | |
154 | #define MASK_MRBSYTO (1 << 1) | |
155 | #define MASK_MRSPTO (1 << 0) | |
156 | ||
ee4b8887 GL |
157 | #define MASK_START_CMD (MASK_MCMDVIO | MASK_MBUFVIO | MASK_MWDATERR | \ |
158 | MASK_MRDATERR | MASK_MRIDXERR | MASK_MRSPERR | \ | |
159 | MASK_MCCSTO | MASK_MCRCSTO | MASK_MWDATTO | \ | |
160 | MASK_MRDATTO | MASK_MRBSYTO | MASK_MRSPTO) | |
161 | ||
fdc50a94 YG |
162 | /* CE_HOST_STS1 */ |
163 | #define STS1_CMDSEQ (1 << 31) | |
164 | ||
165 | /* CE_HOST_STS2 */ | |
166 | #define STS2_CRCSTE (1 << 31) | |
167 | #define STS2_CRC16E (1 << 30) | |
168 | #define STS2_AC12CRCE (1 << 29) | |
169 | #define STS2_RSPCRC7E (1 << 28) | |
170 | #define STS2_CRCSTEBE (1 << 27) | |
171 | #define STS2_RDATEBE (1 << 26) | |
172 | #define STS2_AC12REBE (1 << 25) | |
173 | #define STS2_RSPEBE (1 << 24) | |
174 | #define STS2_AC12IDXE (1 << 23) | |
175 | #define STS2_RSPIDXE (1 << 22) | |
176 | #define STS2_CCSTO (1 << 15) | |
177 | #define STS2_RDATTO (1 << 14) | |
178 | #define STS2_DATBSYTO (1 << 13) | |
179 | #define STS2_CRCSTTO (1 << 12) | |
180 | #define STS2_AC12BSYTO (1 << 11) | |
181 | #define STS2_RSPBSYTO (1 << 10) | |
182 | #define STS2_AC12RSPTO (1 << 9) | |
183 | #define STS2_RSPTO (1 << 8) | |
184 | #define STS2_CRC_ERR (STS2_CRCSTE | STS2_CRC16E | \ | |
185 | STS2_AC12CRCE | STS2_RSPCRC7E | STS2_CRCSTEBE) | |
186 | #define STS2_TIMEOUT_ERR (STS2_CCSTO | STS2_RDATTO | \ | |
187 | STS2_DATBSYTO | STS2_CRCSTTO | \ | |
188 | STS2_AC12BSYTO | STS2_RSPBSYTO | \ | |
189 | STS2_AC12RSPTO | STS2_RSPTO) | |
190 | ||
fdc50a94 YG |
191 | #define CLKDEV_EMMC_DATA 52000000 /* 52MHz */ |
192 | #define CLKDEV_MMC_DATA 20000000 /* 20MHz */ | |
193 | #define CLKDEV_INIT 400000 /* 400 KHz */ | |
194 | ||
3b0beafc GL |
195 | enum mmcif_state { |
196 | STATE_IDLE, | |
197 | STATE_REQUEST, | |
198 | STATE_IOS, | |
199 | }; | |
200 | ||
f985da17 GL |
201 | enum mmcif_wait_for { |
202 | MMCIF_WAIT_FOR_REQUEST, | |
203 | MMCIF_WAIT_FOR_CMD, | |
204 | MMCIF_WAIT_FOR_MREAD, | |
205 | MMCIF_WAIT_FOR_MWRITE, | |
206 | MMCIF_WAIT_FOR_READ, | |
207 | MMCIF_WAIT_FOR_WRITE, | |
208 | MMCIF_WAIT_FOR_READ_END, | |
209 | MMCIF_WAIT_FOR_WRITE_END, | |
210 | MMCIF_WAIT_FOR_STOP, | |
211 | }; | |
212 | ||
fdc50a94 YG |
213 | struct sh_mmcif_host { |
214 | struct mmc_host *mmc; | |
f985da17 | 215 | struct mmc_request *mrq; |
fdc50a94 YG |
216 | struct platform_device *pd; |
217 | struct clk *hclk; | |
218 | unsigned int clk; | |
219 | int bus_width; | |
555061f9 | 220 | unsigned char timing; |
aa0787a9 | 221 | bool sd_error; |
f985da17 | 222 | bool dying; |
fdc50a94 YG |
223 | long timeout; |
224 | void __iomem *addr; | |
f985da17 | 225 | u32 *pio_ptr; |
ee4b8887 | 226 | spinlock_t lock; /* protect sh_mmcif_host::state */ |
3b0beafc | 227 | enum mmcif_state state; |
f985da17 GL |
228 | enum mmcif_wait_for wait_for; |
229 | struct delayed_work timeout_work; | |
230 | size_t blocksize; | |
231 | int sg_idx; | |
232 | int sg_blkidx; | |
faca6648 | 233 | bool power; |
c9b0cef2 | 234 | bool card_present; |
fdc50a94 | 235 | |
a782d688 GL |
236 | /* DMA support */ |
237 | struct dma_chan *chan_rx; | |
238 | struct dma_chan *chan_tx; | |
239 | struct completion dma_complete; | |
f38f94c6 | 240 | bool dma_active; |
a782d688 | 241 | }; |
fdc50a94 YG |
242 | |
243 | static inline void sh_mmcif_bitset(struct sh_mmcif_host *host, | |
244 | unsigned int reg, u32 val) | |
245 | { | |
487d9fc5 | 246 | writel(val | readl(host->addr + reg), host->addr + reg); |
fdc50a94 YG |
247 | } |
248 | ||
249 | static inline void sh_mmcif_bitclr(struct sh_mmcif_host *host, | |
250 | unsigned int reg, u32 val) | |
251 | { | |
487d9fc5 | 252 | writel(~val & readl(host->addr + reg), host->addr + reg); |
fdc50a94 YG |
253 | } |
254 | ||
a782d688 GL |
255 | static void mmcif_dma_complete(void *arg) |
256 | { | |
257 | struct sh_mmcif_host *host = arg; | |
69983404 GL |
258 | struct mmc_data *data = host->mrq->data; |
259 | ||
a782d688 GL |
260 | dev_dbg(&host->pd->dev, "Command completed\n"); |
261 | ||
69983404 | 262 | if (WARN(!data, "%s: NULL data in DMA completion!\n", |
a782d688 GL |
263 | dev_name(&host->pd->dev))) |
264 | return; | |
265 | ||
a782d688 GL |
266 | complete(&host->dma_complete); |
267 | } | |
268 | ||
269 | static void sh_mmcif_start_dma_rx(struct sh_mmcif_host *host) | |
270 | { | |
69983404 GL |
271 | struct mmc_data *data = host->mrq->data; |
272 | struct scatterlist *sg = data->sg; | |
a782d688 GL |
273 | struct dma_async_tx_descriptor *desc = NULL; |
274 | struct dma_chan *chan = host->chan_rx; | |
275 | dma_cookie_t cookie = -EINVAL; | |
276 | int ret; | |
277 | ||
69983404 | 278 | ret = dma_map_sg(chan->device->dev, sg, data->sg_len, |
1ed828db | 279 | DMA_FROM_DEVICE); |
a782d688 | 280 | if (ret > 0) { |
f38f94c6 | 281 | host->dma_active = true; |
16052827 | 282 | desc = dmaengine_prep_slave_sg(chan, sg, ret, |
05f5799c | 283 | DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
a782d688 GL |
284 | } |
285 | ||
286 | if (desc) { | |
287 | desc->callback = mmcif_dma_complete; | |
288 | desc->callback_param = host; | |
a5ece7d2 LW |
289 | cookie = dmaengine_submit(desc); |
290 | sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN); | |
291 | dma_async_issue_pending(chan); | |
a782d688 GL |
292 | } |
293 | dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n", | |
69983404 | 294 | __func__, data->sg_len, ret, cookie); |
a782d688 GL |
295 | |
296 | if (!desc) { | |
297 | /* DMA failed, fall back to PIO */ | |
298 | if (ret >= 0) | |
299 | ret = -EIO; | |
300 | host->chan_rx = NULL; | |
f38f94c6 | 301 | host->dma_active = false; |
a782d688 GL |
302 | dma_release_channel(chan); |
303 | /* Free the Tx channel too */ | |
304 | chan = host->chan_tx; | |
305 | if (chan) { | |
306 | host->chan_tx = NULL; | |
307 | dma_release_channel(chan); | |
308 | } | |
309 | dev_warn(&host->pd->dev, | |
310 | "DMA failed: %d, falling back to PIO\n", ret); | |
311 | sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); | |
312 | } | |
313 | ||
314 | dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__, | |
69983404 | 315 | desc, cookie, data->sg_len); |
a782d688 GL |
316 | } |
317 | ||
318 | static void sh_mmcif_start_dma_tx(struct sh_mmcif_host *host) | |
319 | { | |
69983404 GL |
320 | struct mmc_data *data = host->mrq->data; |
321 | struct scatterlist *sg = data->sg; | |
a782d688 GL |
322 | struct dma_async_tx_descriptor *desc = NULL; |
323 | struct dma_chan *chan = host->chan_tx; | |
324 | dma_cookie_t cookie = -EINVAL; | |
325 | int ret; | |
326 | ||
69983404 | 327 | ret = dma_map_sg(chan->device->dev, sg, data->sg_len, |
1ed828db | 328 | DMA_TO_DEVICE); |
a782d688 | 329 | if (ret > 0) { |
f38f94c6 | 330 | host->dma_active = true; |
16052827 | 331 | desc = dmaengine_prep_slave_sg(chan, sg, ret, |
05f5799c | 332 | DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
a782d688 GL |
333 | } |
334 | ||
335 | if (desc) { | |
336 | desc->callback = mmcif_dma_complete; | |
337 | desc->callback_param = host; | |
a5ece7d2 LW |
338 | cookie = dmaengine_submit(desc); |
339 | sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAWEN); | |
340 | dma_async_issue_pending(chan); | |
a782d688 GL |
341 | } |
342 | dev_dbg(&host->pd->dev, "%s(): mapped %d -> %d, cookie %d\n", | |
69983404 | 343 | __func__, data->sg_len, ret, cookie); |
a782d688 GL |
344 | |
345 | if (!desc) { | |
346 | /* DMA failed, fall back to PIO */ | |
347 | if (ret >= 0) | |
348 | ret = -EIO; | |
349 | host->chan_tx = NULL; | |
f38f94c6 | 350 | host->dma_active = false; |
a782d688 GL |
351 | dma_release_channel(chan); |
352 | /* Free the Rx channel too */ | |
353 | chan = host->chan_rx; | |
354 | if (chan) { | |
355 | host->chan_rx = NULL; | |
356 | dma_release_channel(chan); | |
357 | } | |
358 | dev_warn(&host->pd->dev, | |
359 | "DMA failed: %d, falling back to PIO\n", ret); | |
360 | sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); | |
361 | } | |
362 | ||
363 | dev_dbg(&host->pd->dev, "%s(): desc %p, cookie %d\n", __func__, | |
364 | desc, cookie); | |
365 | } | |
366 | ||
a782d688 GL |
367 | static void sh_mmcif_request_dma(struct sh_mmcif_host *host, |
368 | struct sh_mmcif_plat_data *pdata) | |
369 | { | |
0e79f9ae GL |
370 | struct resource *res = platform_get_resource(host->pd, IORESOURCE_MEM, 0); |
371 | struct dma_slave_config cfg; | |
372 | dma_cap_mask_t mask; | |
373 | int ret; | |
a782d688 | 374 | |
f38f94c6 | 375 | host->dma_active = false; |
a782d688 | 376 | |
bf68a812 GL |
377 | if (!pdata) |
378 | return; | |
379 | ||
0e79f9ae GL |
380 | if (pdata->slave_id_tx <= 0 || pdata->slave_id_rx <= 0) |
381 | return; | |
a782d688 | 382 | |
0e79f9ae GL |
383 | /* We can only either use DMA for both Tx and Rx or not use it at all */ |
384 | dma_cap_zero(mask); | |
385 | dma_cap_set(DMA_SLAVE, mask); | |
a782d688 | 386 | |
0e79f9ae GL |
387 | host->chan_tx = dma_request_channel(mask, shdma_chan_filter, |
388 | (void *)pdata->slave_id_tx); | |
389 | dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__, | |
390 | host->chan_tx); | |
a782d688 | 391 | |
0e79f9ae GL |
392 | if (!host->chan_tx) |
393 | return; | |
a782d688 | 394 | |
0e79f9ae GL |
395 | cfg.slave_id = pdata->slave_id_tx; |
396 | cfg.direction = DMA_MEM_TO_DEV; | |
397 | cfg.dst_addr = res->start + MMCIF_CE_DATA; | |
398 | cfg.src_addr = 0; | |
399 | ret = dmaengine_slave_config(host->chan_tx, &cfg); | |
400 | if (ret < 0) | |
401 | goto ecfgtx; | |
402 | ||
403 | host->chan_rx = dma_request_channel(mask, shdma_chan_filter, | |
404 | (void *)pdata->slave_id_rx); | |
405 | dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__, | |
406 | host->chan_rx); | |
407 | ||
408 | if (!host->chan_rx) | |
409 | goto erqrx; | |
410 | ||
411 | cfg.slave_id = pdata->slave_id_rx; | |
412 | cfg.direction = DMA_DEV_TO_MEM; | |
413 | cfg.dst_addr = 0; | |
414 | cfg.src_addr = res->start + MMCIF_CE_DATA; | |
415 | ret = dmaengine_slave_config(host->chan_rx, &cfg); | |
416 | if (ret < 0) | |
417 | goto ecfgrx; | |
418 | ||
419 | init_completion(&host->dma_complete); | |
420 | ||
421 | return; | |
422 | ||
423 | ecfgrx: | |
424 | dma_release_channel(host->chan_rx); | |
425 | host->chan_rx = NULL; | |
426 | erqrx: | |
427 | ecfgtx: | |
428 | dma_release_channel(host->chan_tx); | |
429 | host->chan_tx = NULL; | |
a782d688 GL |
430 | } |
431 | ||
432 | static void sh_mmcif_release_dma(struct sh_mmcif_host *host) | |
433 | { | |
434 | sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, BUF_ACC_DMAREN | BUF_ACC_DMAWEN); | |
435 | /* Descriptors are freed automatically */ | |
436 | if (host->chan_tx) { | |
437 | struct dma_chan *chan = host->chan_tx; | |
438 | host->chan_tx = NULL; | |
439 | dma_release_channel(chan); | |
440 | } | |
441 | if (host->chan_rx) { | |
442 | struct dma_chan *chan = host->chan_rx; | |
443 | host->chan_rx = NULL; | |
444 | dma_release_channel(chan); | |
445 | } | |
446 | ||
f38f94c6 | 447 | host->dma_active = false; |
a782d688 | 448 | } |
fdc50a94 YG |
449 | |
450 | static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk) | |
451 | { | |
452 | struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; | |
bf68a812 | 453 | bool sup_pclk = p ? p->sup_pclk : false; |
fdc50a94 YG |
454 | |
455 | sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE); | |
456 | sh_mmcif_bitclr(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR); | |
457 | ||
458 | if (!clk) | |
459 | return; | |
bf68a812 | 460 | if (sup_pclk && clk == host->clk) |
fdc50a94 YG |
461 | sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_SUP_PCLK); |
462 | else | |
463 | sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_CLEAR & | |
f9388257 SH |
464 | ((fls(DIV_ROUND_UP(host->clk, |
465 | clk) - 1) - 1) << 16)); | |
fdc50a94 YG |
466 | |
467 | sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, CLK_ENABLE); | |
468 | } | |
469 | ||
470 | static void sh_mmcif_sync_reset(struct sh_mmcif_host *host) | |
471 | { | |
472 | u32 tmp; | |
473 | ||
487d9fc5 | 474 | tmp = 0x010f0000 & sh_mmcif_readl(host->addr, MMCIF_CE_CLK_CTRL); |
fdc50a94 | 475 | |
487d9fc5 MD |
476 | sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_ON); |
477 | sh_mmcif_writel(host->addr, MMCIF_CE_VERSION, SOFT_RST_OFF); | |
fdc50a94 YG |
478 | sh_mmcif_bitset(host, MMCIF_CE_CLK_CTRL, tmp | |
479 | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); | |
480 | /* byte swap on */ | |
481 | sh_mmcif_bitset(host, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP); | |
482 | } | |
483 | ||
484 | static int sh_mmcif_error_manage(struct sh_mmcif_host *host) | |
485 | { | |
486 | u32 state1, state2; | |
ee4b8887 | 487 | int ret, timeout; |
fdc50a94 | 488 | |
aa0787a9 | 489 | host->sd_error = false; |
fdc50a94 | 490 | |
487d9fc5 MD |
491 | state1 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1); |
492 | state2 = sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS2); | |
e47bf32a GL |
493 | dev_dbg(&host->pd->dev, "ERR HOST_STS1 = %08x\n", state1); |
494 | dev_dbg(&host->pd->dev, "ERR HOST_STS2 = %08x\n", state2); | |
fdc50a94 YG |
495 | |
496 | if (state1 & STS1_CMDSEQ) { | |
497 | sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, CMD_CTRL_BREAK); | |
498 | sh_mmcif_bitset(host, MMCIF_CE_CMD_CTRL, ~CMD_CTRL_BREAK); | |
ee4b8887 | 499 | for (timeout = 10000000; timeout; timeout--) { |
487d9fc5 | 500 | if (!(sh_mmcif_readl(host->addr, MMCIF_CE_HOST_STS1) |
ee4b8887 | 501 | & STS1_CMDSEQ)) |
fdc50a94 YG |
502 | break; |
503 | mdelay(1); | |
504 | } | |
ee4b8887 GL |
505 | if (!timeout) { |
506 | dev_err(&host->pd->dev, | |
507 | "Forced end of command sequence timeout err\n"); | |
508 | return -EIO; | |
509 | } | |
fdc50a94 | 510 | sh_mmcif_sync_reset(host); |
e47bf32a | 511 | dev_dbg(&host->pd->dev, "Forced end of command sequence\n"); |
fdc50a94 YG |
512 | return -EIO; |
513 | } | |
514 | ||
515 | if (state2 & STS2_CRC_ERR) { | |
ee4b8887 | 516 | dev_dbg(&host->pd->dev, ": CRC error\n"); |
fdc50a94 YG |
517 | ret = -EIO; |
518 | } else if (state2 & STS2_TIMEOUT_ERR) { | |
ee4b8887 | 519 | dev_dbg(&host->pd->dev, ": Timeout\n"); |
fdc50a94 YG |
520 | ret = -ETIMEDOUT; |
521 | } else { | |
ee4b8887 | 522 | dev_dbg(&host->pd->dev, ": End/Index error\n"); |
fdc50a94 YG |
523 | ret = -EIO; |
524 | } | |
525 | return ret; | |
526 | } | |
527 | ||
f985da17 | 528 | static bool sh_mmcif_next_block(struct sh_mmcif_host *host, u32 *p) |
fdc50a94 | 529 | { |
f985da17 GL |
530 | struct mmc_data *data = host->mrq->data; |
531 | ||
532 | host->sg_blkidx += host->blocksize; | |
533 | ||
534 | /* data->sg->length must be a multiple of host->blocksize? */ | |
535 | BUG_ON(host->sg_blkidx > data->sg->length); | |
536 | ||
537 | if (host->sg_blkidx == data->sg->length) { | |
538 | host->sg_blkidx = 0; | |
539 | if (++host->sg_idx < data->sg_len) | |
540 | host->pio_ptr = sg_virt(++data->sg); | |
541 | } else { | |
542 | host->pio_ptr = p; | |
543 | } | |
544 | ||
545 | if (host->sg_idx == data->sg_len) | |
546 | return false; | |
547 | ||
548 | return true; | |
549 | } | |
550 | ||
551 | static void sh_mmcif_single_read(struct sh_mmcif_host *host, | |
552 | struct mmc_request *mrq) | |
553 | { | |
554 | host->blocksize = (sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) & | |
555 | BLOCK_SIZE_MASK) + 3; | |
556 | ||
557 | host->wait_for = MMCIF_WAIT_FOR_READ; | |
fdc50a94 | 558 | |
fdc50a94 YG |
559 | /* buf read enable */ |
560 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); | |
f985da17 GL |
561 | } |
562 | ||
563 | static bool sh_mmcif_read_block(struct sh_mmcif_host *host) | |
564 | { | |
565 | struct mmc_data *data = host->mrq->data; | |
566 | u32 *p = sg_virt(data->sg); | |
567 | int i; | |
568 | ||
569 | if (host->sd_error) { | |
570 | data->error = sh_mmcif_error_manage(host); | |
571 | return false; | |
572 | } | |
573 | ||
574 | for (i = 0; i < host->blocksize / 4; i++) | |
487d9fc5 | 575 | *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); |
fdc50a94 YG |
576 | |
577 | /* buffer read end */ | |
578 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); | |
f985da17 | 579 | host->wait_for = MMCIF_WAIT_FOR_READ_END; |
fdc50a94 | 580 | |
f985da17 | 581 | return true; |
fdc50a94 YG |
582 | } |
583 | ||
f985da17 GL |
584 | static void sh_mmcif_multi_read(struct sh_mmcif_host *host, |
585 | struct mmc_request *mrq) | |
fdc50a94 YG |
586 | { |
587 | struct mmc_data *data = mrq->data; | |
f985da17 GL |
588 | |
589 | if (!data->sg_len || !data->sg->length) | |
590 | return; | |
591 | ||
592 | host->blocksize = sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) & | |
593 | BLOCK_SIZE_MASK; | |
594 | ||
595 | host->wait_for = MMCIF_WAIT_FOR_MREAD; | |
596 | host->sg_idx = 0; | |
597 | host->sg_blkidx = 0; | |
598 | host->pio_ptr = sg_virt(data->sg); | |
5df460b1 | 599 | |
f985da17 GL |
600 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); |
601 | } | |
602 | ||
603 | static bool sh_mmcif_mread_block(struct sh_mmcif_host *host) | |
604 | { | |
605 | struct mmc_data *data = host->mrq->data; | |
606 | u32 *p = host->pio_ptr; | |
607 | int i; | |
608 | ||
609 | if (host->sd_error) { | |
610 | data->error = sh_mmcif_error_manage(host); | |
611 | return false; | |
fdc50a94 | 612 | } |
f985da17 GL |
613 | |
614 | BUG_ON(!data->sg->length); | |
615 | ||
616 | for (i = 0; i < host->blocksize / 4; i++) | |
617 | *p++ = sh_mmcif_readl(host->addr, MMCIF_CE_DATA); | |
618 | ||
619 | if (!sh_mmcif_next_block(host, p)) | |
620 | return false; | |
621 | ||
f985da17 GL |
622 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); |
623 | ||
624 | return true; | |
fdc50a94 YG |
625 | } |
626 | ||
f985da17 | 627 | static void sh_mmcif_single_write(struct sh_mmcif_host *host, |
fdc50a94 YG |
628 | struct mmc_request *mrq) |
629 | { | |
f985da17 GL |
630 | host->blocksize = (sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) & |
631 | BLOCK_SIZE_MASK) + 3; | |
fdc50a94 | 632 | |
f985da17 | 633 | host->wait_for = MMCIF_WAIT_FOR_WRITE; |
fdc50a94 YG |
634 | |
635 | /* buf write enable */ | |
f985da17 GL |
636 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); |
637 | } | |
638 | ||
639 | static bool sh_mmcif_write_block(struct sh_mmcif_host *host) | |
640 | { | |
641 | struct mmc_data *data = host->mrq->data; | |
642 | u32 *p = sg_virt(data->sg); | |
643 | int i; | |
644 | ||
645 | if (host->sd_error) { | |
646 | data->error = sh_mmcif_error_manage(host); | |
647 | return false; | |
648 | } | |
649 | ||
650 | for (i = 0; i < host->blocksize / 4; i++) | |
487d9fc5 | 651 | sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); |
fdc50a94 YG |
652 | |
653 | /* buffer write end */ | |
654 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); | |
f985da17 | 655 | host->wait_for = MMCIF_WAIT_FOR_WRITE_END; |
fdc50a94 | 656 | |
f985da17 | 657 | return true; |
fdc50a94 YG |
658 | } |
659 | ||
f985da17 GL |
660 | static void sh_mmcif_multi_write(struct sh_mmcif_host *host, |
661 | struct mmc_request *mrq) | |
fdc50a94 YG |
662 | { |
663 | struct mmc_data *data = mrq->data; | |
fdc50a94 | 664 | |
f985da17 GL |
665 | if (!data->sg_len || !data->sg->length) |
666 | return; | |
fdc50a94 | 667 | |
f985da17 GL |
668 | host->blocksize = sh_mmcif_readl(host->addr, MMCIF_CE_BLOCK_SET) & |
669 | BLOCK_SIZE_MASK; | |
fdc50a94 | 670 | |
f985da17 GL |
671 | host->wait_for = MMCIF_WAIT_FOR_MWRITE; |
672 | host->sg_idx = 0; | |
673 | host->sg_blkidx = 0; | |
674 | host->pio_ptr = sg_virt(data->sg); | |
5df460b1 | 675 | |
f985da17 GL |
676 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); |
677 | } | |
fdc50a94 | 678 | |
f985da17 GL |
679 | static bool sh_mmcif_mwrite_block(struct sh_mmcif_host *host) |
680 | { | |
681 | struct mmc_data *data = host->mrq->data; | |
682 | u32 *p = host->pio_ptr; | |
683 | int i; | |
684 | ||
685 | if (host->sd_error) { | |
686 | data->error = sh_mmcif_error_manage(host); | |
687 | return false; | |
fdc50a94 | 688 | } |
f985da17 GL |
689 | |
690 | BUG_ON(!data->sg->length); | |
691 | ||
692 | for (i = 0; i < host->blocksize / 4; i++) | |
693 | sh_mmcif_writel(host->addr, MMCIF_CE_DATA, *p++); | |
694 | ||
695 | if (!sh_mmcif_next_block(host, p)) | |
696 | return false; | |
697 | ||
f985da17 GL |
698 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); |
699 | ||
700 | return true; | |
fdc50a94 YG |
701 | } |
702 | ||
703 | static void sh_mmcif_get_response(struct sh_mmcif_host *host, | |
704 | struct mmc_command *cmd) | |
705 | { | |
706 | if (cmd->flags & MMC_RSP_136) { | |
487d9fc5 MD |
707 | cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP3); |
708 | cmd->resp[1] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP2); | |
709 | cmd->resp[2] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP1); | |
710 | cmd->resp[3] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0); | |
fdc50a94 | 711 | } else |
487d9fc5 | 712 | cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP0); |
fdc50a94 YG |
713 | } |
714 | ||
715 | static void sh_mmcif_get_cmd12response(struct sh_mmcif_host *host, | |
716 | struct mmc_command *cmd) | |
717 | { | |
487d9fc5 | 718 | cmd->resp[0] = sh_mmcif_readl(host->addr, MMCIF_CE_RESP_CMD12); |
fdc50a94 YG |
719 | } |
720 | ||
721 | static u32 sh_mmcif_set_cmd(struct sh_mmcif_host *host, | |
69983404 | 722 | struct mmc_request *mrq) |
fdc50a94 | 723 | { |
69983404 GL |
724 | struct mmc_data *data = mrq->data; |
725 | struct mmc_command *cmd = mrq->cmd; | |
726 | u32 opc = cmd->opcode; | |
fdc50a94 YG |
727 | u32 tmp = 0; |
728 | ||
729 | /* Response Type check */ | |
730 | switch (mmc_resp_type(cmd)) { | |
731 | case MMC_RSP_NONE: | |
732 | tmp |= CMD_SET_RTYP_NO; | |
733 | break; | |
734 | case MMC_RSP_R1: | |
735 | case MMC_RSP_R1B: | |
736 | case MMC_RSP_R3: | |
737 | tmp |= CMD_SET_RTYP_6B; | |
738 | break; | |
739 | case MMC_RSP_R2: | |
740 | tmp |= CMD_SET_RTYP_17B; | |
741 | break; | |
742 | default: | |
e47bf32a | 743 | dev_err(&host->pd->dev, "Unsupported response type.\n"); |
fdc50a94 YG |
744 | break; |
745 | } | |
746 | switch (opc) { | |
747 | /* RBSY */ | |
a812ba0f | 748 | case MMC_SLEEP_AWAKE: |
fdc50a94 YG |
749 | case MMC_SWITCH: |
750 | case MMC_STOP_TRANSMISSION: | |
751 | case MMC_SET_WRITE_PROT: | |
752 | case MMC_CLR_WRITE_PROT: | |
753 | case MMC_ERASE: | |
fdc50a94 YG |
754 | tmp |= CMD_SET_RBSY; |
755 | break; | |
756 | } | |
757 | /* WDAT / DATW */ | |
69983404 | 758 | if (data) { |
fdc50a94 YG |
759 | tmp |= CMD_SET_WDAT; |
760 | switch (host->bus_width) { | |
761 | case MMC_BUS_WIDTH_1: | |
762 | tmp |= CMD_SET_DATW_1; | |
763 | break; | |
764 | case MMC_BUS_WIDTH_4: | |
765 | tmp |= CMD_SET_DATW_4; | |
766 | break; | |
767 | case MMC_BUS_WIDTH_8: | |
768 | tmp |= CMD_SET_DATW_8; | |
769 | break; | |
770 | default: | |
e47bf32a | 771 | dev_err(&host->pd->dev, "Unsupported bus width.\n"); |
fdc50a94 YG |
772 | break; |
773 | } | |
555061f9 TK |
774 | switch (host->timing) { |
775 | case MMC_TIMING_UHS_DDR50: | |
776 | /* | |
777 | * MMC core will only set this timing, if the host | |
778 | * advertises the MMC_CAP_UHS_DDR50 capability. MMCIF | |
779 | * implementations with this capability, e.g. sh73a0, | |
780 | * will have to set it in their platform data. | |
781 | */ | |
782 | tmp |= CMD_SET_DARS; | |
783 | break; | |
784 | } | |
fdc50a94 YG |
785 | } |
786 | /* DWEN */ | |
787 | if (opc == MMC_WRITE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) | |
788 | tmp |= CMD_SET_DWEN; | |
789 | /* CMLTE/CMD12EN */ | |
790 | if (opc == MMC_READ_MULTIPLE_BLOCK || opc == MMC_WRITE_MULTIPLE_BLOCK) { | |
791 | tmp |= CMD_SET_CMLTE | CMD_SET_CMD12EN; | |
792 | sh_mmcif_bitset(host, MMCIF_CE_BLOCK_SET, | |
69983404 | 793 | data->blocks << 16); |
fdc50a94 YG |
794 | } |
795 | /* RIDXC[1:0] check bits */ | |
796 | if (opc == MMC_SEND_OP_COND || opc == MMC_ALL_SEND_CID || | |
797 | opc == MMC_SEND_CSD || opc == MMC_SEND_CID) | |
798 | tmp |= CMD_SET_RIDXC_BITS; | |
799 | /* RCRC7C[1:0] check bits */ | |
800 | if (opc == MMC_SEND_OP_COND) | |
801 | tmp |= CMD_SET_CRC7C_BITS; | |
802 | /* RCRC7C[1:0] internal CRC7 */ | |
803 | if (opc == MMC_ALL_SEND_CID || | |
804 | opc == MMC_SEND_CSD || opc == MMC_SEND_CID) | |
805 | tmp |= CMD_SET_CRC7C_INTERNAL; | |
806 | ||
69983404 | 807 | return (opc << 24) | tmp; |
fdc50a94 YG |
808 | } |
809 | ||
e47bf32a | 810 | static int sh_mmcif_data_trans(struct sh_mmcif_host *host, |
f985da17 | 811 | struct mmc_request *mrq, u32 opc) |
fdc50a94 | 812 | { |
fdc50a94 YG |
813 | switch (opc) { |
814 | case MMC_READ_MULTIPLE_BLOCK: | |
f985da17 GL |
815 | sh_mmcif_multi_read(host, mrq); |
816 | return 0; | |
fdc50a94 | 817 | case MMC_WRITE_MULTIPLE_BLOCK: |
f985da17 GL |
818 | sh_mmcif_multi_write(host, mrq); |
819 | return 0; | |
fdc50a94 | 820 | case MMC_WRITE_BLOCK: |
f985da17 GL |
821 | sh_mmcif_single_write(host, mrq); |
822 | return 0; | |
fdc50a94 YG |
823 | case MMC_READ_SINGLE_BLOCK: |
824 | case MMC_SEND_EXT_CSD: | |
f985da17 GL |
825 | sh_mmcif_single_read(host, mrq); |
826 | return 0; | |
fdc50a94 | 827 | default: |
e47bf32a | 828 | dev_err(&host->pd->dev, "UNSUPPORTED CMD = d'%08d\n", opc); |
ee4b8887 | 829 | return -EINVAL; |
fdc50a94 | 830 | } |
fdc50a94 YG |
831 | } |
832 | ||
833 | static void sh_mmcif_start_cmd(struct sh_mmcif_host *host, | |
ee4b8887 | 834 | struct mmc_request *mrq) |
fdc50a94 | 835 | { |
ee4b8887 | 836 | struct mmc_command *cmd = mrq->cmd; |
f985da17 GL |
837 | u32 opc = cmd->opcode; |
838 | u32 mask; | |
fdc50a94 | 839 | |
fdc50a94 | 840 | switch (opc) { |
ee4b8887 | 841 | /* response busy check */ |
a812ba0f | 842 | case MMC_SLEEP_AWAKE: |
fdc50a94 YG |
843 | case MMC_SWITCH: |
844 | case MMC_STOP_TRANSMISSION: | |
845 | case MMC_SET_WRITE_PROT: | |
846 | case MMC_CLR_WRITE_PROT: | |
847 | case MMC_ERASE: | |
ee4b8887 | 848 | mask = MASK_START_CMD | MASK_MRBSYE; |
fdc50a94 YG |
849 | break; |
850 | default: | |
ee4b8887 | 851 | mask = MASK_START_CMD | MASK_MCRSPE; |
fdc50a94 YG |
852 | break; |
853 | } | |
fdc50a94 | 854 | |
69983404 | 855 | if (mrq->data) { |
487d9fc5 MD |
856 | sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, 0); |
857 | sh_mmcif_writel(host->addr, MMCIF_CE_BLOCK_SET, | |
858 | mrq->data->blksz); | |
fdc50a94 | 859 | } |
69983404 | 860 | opc = sh_mmcif_set_cmd(host, mrq); |
fdc50a94 | 861 | |
487d9fc5 MD |
862 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, 0xD80430C0); |
863 | sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, mask); | |
fdc50a94 | 864 | /* set arg */ |
487d9fc5 | 865 | sh_mmcif_writel(host->addr, MMCIF_CE_ARG, cmd->arg); |
fdc50a94 | 866 | /* set cmd */ |
487d9fc5 | 867 | sh_mmcif_writel(host->addr, MMCIF_CE_CMD_SET, opc); |
fdc50a94 | 868 | |
f985da17 GL |
869 | host->wait_for = MMCIF_WAIT_FOR_CMD; |
870 | schedule_delayed_work(&host->timeout_work, host->timeout); | |
fdc50a94 YG |
871 | } |
872 | ||
873 | static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host, | |
ee4b8887 | 874 | struct mmc_request *mrq) |
fdc50a94 | 875 | { |
69983404 GL |
876 | switch (mrq->cmd->opcode) { |
877 | case MMC_READ_MULTIPLE_BLOCK: | |
fdc50a94 | 878 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE); |
69983404 GL |
879 | break; |
880 | case MMC_WRITE_MULTIPLE_BLOCK: | |
fdc50a94 | 881 | sh_mmcif_bitset(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE); |
69983404 GL |
882 | break; |
883 | default: | |
e47bf32a | 884 | dev_err(&host->pd->dev, "unsupported stop cmd\n"); |
69983404 | 885 | mrq->stop->error = sh_mmcif_error_manage(host); |
fdc50a94 YG |
886 | return; |
887 | } | |
888 | ||
f985da17 | 889 | host->wait_for = MMCIF_WAIT_FOR_STOP; |
fdc50a94 YG |
890 | } |
891 | ||
892 | static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
893 | { | |
894 | struct sh_mmcif_host *host = mmc_priv(mmc); | |
3b0beafc GL |
895 | unsigned long flags; |
896 | ||
897 | spin_lock_irqsave(&host->lock, flags); | |
898 | if (host->state != STATE_IDLE) { | |
899 | spin_unlock_irqrestore(&host->lock, flags); | |
900 | mrq->cmd->error = -EAGAIN; | |
901 | mmc_request_done(mmc, mrq); | |
902 | return; | |
903 | } | |
904 | ||
905 | host->state = STATE_REQUEST; | |
906 | spin_unlock_irqrestore(&host->lock, flags); | |
fdc50a94 YG |
907 | |
908 | switch (mrq->cmd->opcode) { | |
909 | /* MMCIF does not support SD/SDIO command */ | |
7541ca98 LP |
910 | case MMC_SLEEP_AWAKE: /* = SD_IO_SEND_OP_COND (5) */ |
911 | case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */ | |
912 | if ((mrq->cmd->flags & MMC_CMD_MASK) != MMC_CMD_BCR) | |
913 | break; | |
fdc50a94 | 914 | case MMC_APP_CMD: |
92ff0c5b | 915 | case SD_IO_RW_DIRECT: |
3b0beafc | 916 | host->state = STATE_IDLE; |
fdc50a94 YG |
917 | mrq->cmd->error = -ETIMEDOUT; |
918 | mmc_request_done(mmc, mrq); | |
919 | return; | |
fdc50a94 YG |
920 | default: |
921 | break; | |
922 | } | |
f985da17 GL |
923 | |
924 | host->mrq = mrq; | |
fdc50a94 | 925 | |
f985da17 | 926 | sh_mmcif_start_cmd(host, mrq); |
fdc50a94 YG |
927 | } |
928 | ||
a6609267 GL |
929 | static int sh_mmcif_clk_update(struct sh_mmcif_host *host) |
930 | { | |
931 | int ret = clk_enable(host->hclk); | |
932 | ||
933 | if (!ret) { | |
934 | host->clk = clk_get_rate(host->hclk); | |
935 | host->mmc->f_max = host->clk / 2; | |
936 | host->mmc->f_min = host->clk / 512; | |
937 | } | |
938 | ||
939 | return ret; | |
940 | } | |
941 | ||
7d17baa0 GL |
942 | static void sh_mmcif_set_power(struct sh_mmcif_host *host, struct mmc_ios *ios) |
943 | { | |
944 | struct sh_mmcif_plat_data *pd = host->pd->dev.platform_data; | |
945 | struct mmc_host *mmc = host->mmc; | |
946 | ||
bf68a812 | 947 | if (pd && pd->set_pwr) |
7d17baa0 GL |
948 | pd->set_pwr(host->pd, ios->power_mode != MMC_POWER_OFF); |
949 | if (!IS_ERR(mmc->supply.vmmc)) | |
950 | /* Errors ignored... */ | |
951 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, | |
952 | ios->power_mode ? ios->vdd : 0); | |
953 | } | |
954 | ||
fdc50a94 YG |
955 | static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
956 | { | |
957 | struct sh_mmcif_host *host = mmc_priv(mmc); | |
3b0beafc GL |
958 | unsigned long flags; |
959 | ||
960 | spin_lock_irqsave(&host->lock, flags); | |
961 | if (host->state != STATE_IDLE) { | |
962 | spin_unlock_irqrestore(&host->lock, flags); | |
963 | return; | |
964 | } | |
965 | ||
966 | host->state = STATE_IOS; | |
967 | spin_unlock_irqrestore(&host->lock, flags); | |
fdc50a94 | 968 | |
f5e0cec4 | 969 | if (ios->power_mode == MMC_POWER_UP) { |
c9b0cef2 | 970 | if (!host->card_present) { |
faca6648 GL |
971 | /* See if we also get DMA */ |
972 | sh_mmcif_request_dma(host, host->pd->dev.platform_data); | |
c9b0cef2 | 973 | host->card_present = true; |
faca6648 | 974 | } |
7d17baa0 | 975 | sh_mmcif_set_power(host, ios); |
f5e0cec4 | 976 | } else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) { |
fdc50a94 YG |
977 | /* clock stop */ |
978 | sh_mmcif_clock_control(host, 0); | |
faca6648 | 979 | if (ios->power_mode == MMC_POWER_OFF) { |
c9b0cef2 | 980 | if (host->card_present) { |
faca6648 | 981 | sh_mmcif_release_dma(host); |
c9b0cef2 | 982 | host->card_present = false; |
faca6648 | 983 | } |
c9b0cef2 GL |
984 | } |
985 | if (host->power) { | |
f8a8ced7 | 986 | pm_runtime_put_sync(&host->pd->dev); |
b289174f | 987 | clk_disable(host->hclk); |
c9b0cef2 | 988 | host->power = false; |
7d17baa0 GL |
989 | if (ios->power_mode == MMC_POWER_OFF) |
990 | sh_mmcif_set_power(host, ios); | |
faca6648 | 991 | } |
3b0beafc | 992 | host->state = STATE_IDLE; |
fdc50a94 | 993 | return; |
fdc50a94 YG |
994 | } |
995 | ||
c9b0cef2 GL |
996 | if (ios->clock) { |
997 | if (!host->power) { | |
a6609267 | 998 | sh_mmcif_clk_update(host); |
c9b0cef2 GL |
999 | pm_runtime_get_sync(&host->pd->dev); |
1000 | host->power = true; | |
1001 | sh_mmcif_sync_reset(host); | |
1002 | } | |
fdc50a94 | 1003 | sh_mmcif_clock_control(host, ios->clock); |
c9b0cef2 | 1004 | } |
fdc50a94 | 1005 | |
555061f9 | 1006 | host->timing = ios->timing; |
fdc50a94 | 1007 | host->bus_width = ios->bus_width; |
3b0beafc | 1008 | host->state = STATE_IDLE; |
fdc50a94 YG |
1009 | } |
1010 | ||
777271d0 AH |
1011 | static int sh_mmcif_get_cd(struct mmc_host *mmc) |
1012 | { | |
1013 | struct sh_mmcif_host *host = mmc_priv(mmc); | |
1014 | struct sh_mmcif_plat_data *p = host->pd->dev.platform_data; | |
e480606a GL |
1015 | int ret = mmc_gpio_get_cd(mmc); |
1016 | ||
1017 | if (ret >= 0) | |
1018 | return ret; | |
777271d0 | 1019 | |
bf68a812 | 1020 | if (!p || !p->get_cd) |
777271d0 AH |
1021 | return -ENOSYS; |
1022 | else | |
1023 | return p->get_cd(host->pd); | |
1024 | } | |
1025 | ||
fdc50a94 YG |
1026 | static struct mmc_host_ops sh_mmcif_ops = { |
1027 | .request = sh_mmcif_request, | |
1028 | .set_ios = sh_mmcif_set_ios, | |
777271d0 | 1029 | .get_cd = sh_mmcif_get_cd, |
fdc50a94 YG |
1030 | }; |
1031 | ||
f985da17 GL |
1032 | static bool sh_mmcif_end_cmd(struct sh_mmcif_host *host) |
1033 | { | |
1034 | struct mmc_command *cmd = host->mrq->cmd; | |
69983404 | 1035 | struct mmc_data *data = host->mrq->data; |
f985da17 GL |
1036 | long time; |
1037 | ||
1038 | if (host->sd_error) { | |
1039 | switch (cmd->opcode) { | |
1040 | case MMC_ALL_SEND_CID: | |
1041 | case MMC_SELECT_CARD: | |
1042 | case MMC_APP_CMD: | |
1043 | cmd->error = -ETIMEDOUT; | |
1044 | host->sd_error = false; | |
1045 | break; | |
1046 | default: | |
1047 | cmd->error = sh_mmcif_error_manage(host); | |
1048 | dev_dbg(&host->pd->dev, "Cmd(d'%d) error %d\n", | |
1049 | cmd->opcode, cmd->error); | |
1050 | break; | |
1051 | } | |
1052 | return false; | |
1053 | } | |
1054 | if (!(cmd->flags & MMC_RSP_PRESENT)) { | |
1055 | cmd->error = 0; | |
1056 | return false; | |
1057 | } | |
1058 | ||
1059 | sh_mmcif_get_response(host, cmd); | |
1060 | ||
69983404 | 1061 | if (!data) |
f985da17 GL |
1062 | return false; |
1063 | ||
69983404 | 1064 | if (data->flags & MMC_DATA_READ) { |
f985da17 GL |
1065 | if (host->chan_rx) |
1066 | sh_mmcif_start_dma_rx(host); | |
1067 | } else { | |
1068 | if (host->chan_tx) | |
1069 | sh_mmcif_start_dma_tx(host); | |
1070 | } | |
1071 | ||
1072 | if (!host->dma_active) { | |
69983404 GL |
1073 | data->error = sh_mmcif_data_trans(host, host->mrq, cmd->opcode); |
1074 | if (!data->error) | |
f985da17 GL |
1075 | return true; |
1076 | return false; | |
1077 | } | |
1078 | ||
1079 | /* Running in the IRQ thread, can sleep */ | |
1080 | time = wait_for_completion_interruptible_timeout(&host->dma_complete, | |
1081 | host->timeout); | |
eae30983 TK |
1082 | |
1083 | if (data->flags & MMC_DATA_READ) | |
1084 | dma_unmap_sg(host->chan_rx->device->dev, | |
1085 | data->sg, data->sg_len, | |
1086 | DMA_FROM_DEVICE); | |
1087 | else | |
1088 | dma_unmap_sg(host->chan_tx->device->dev, | |
1089 | data->sg, data->sg_len, | |
1090 | DMA_TO_DEVICE); | |
1091 | ||
f985da17 GL |
1092 | if (host->sd_error) { |
1093 | dev_err(host->mmc->parent, | |
1094 | "Error IRQ while waiting for DMA completion!\n"); | |
1095 | /* Woken up by an error IRQ: abort DMA */ | |
69983404 | 1096 | data->error = sh_mmcif_error_manage(host); |
f985da17 | 1097 | } else if (!time) { |
69983404 | 1098 | data->error = -ETIMEDOUT; |
f985da17 | 1099 | } else if (time < 0) { |
69983404 | 1100 | data->error = time; |
f985da17 GL |
1101 | } |
1102 | sh_mmcif_bitclr(host, MMCIF_CE_BUF_ACC, | |
1103 | BUF_ACC_DMAREN | BUF_ACC_DMAWEN); | |
1104 | host->dma_active = false; | |
1105 | ||
eae30983 | 1106 | if (data->error) { |
69983404 | 1107 | data->bytes_xfered = 0; |
eae30983 TK |
1108 | /* Abort DMA */ |
1109 | if (data->flags & MMC_DATA_READ) | |
1110 | dmaengine_terminate_all(host->chan_rx); | |
1111 | else | |
1112 | dmaengine_terminate_all(host->chan_tx); | |
1113 | } | |
f985da17 GL |
1114 | |
1115 | return false; | |
1116 | } | |
1117 | ||
1118 | static irqreturn_t sh_mmcif_irqt(int irq, void *dev_id) | |
1119 | { | |
1120 | struct sh_mmcif_host *host = dev_id; | |
1121 | struct mmc_request *mrq = host->mrq; | |
5df460b1 | 1122 | bool wait = false; |
f985da17 GL |
1123 | |
1124 | cancel_delayed_work_sync(&host->timeout_work); | |
1125 | ||
1126 | /* | |
1127 | * All handlers return true, if processing continues, and false, if the | |
1128 | * request has to be completed - successfully or not | |
1129 | */ | |
1130 | switch (host->wait_for) { | |
1131 | case MMCIF_WAIT_FOR_REQUEST: | |
1132 | /* We're too late, the timeout has already kicked in */ | |
1133 | return IRQ_HANDLED; | |
1134 | case MMCIF_WAIT_FOR_CMD: | |
5df460b1 GL |
1135 | /* Wait for data? */ |
1136 | wait = sh_mmcif_end_cmd(host); | |
f985da17 GL |
1137 | break; |
1138 | case MMCIF_WAIT_FOR_MREAD: | |
5df460b1 GL |
1139 | /* Wait for more data? */ |
1140 | wait = sh_mmcif_mread_block(host); | |
f985da17 GL |
1141 | break; |
1142 | case MMCIF_WAIT_FOR_READ: | |
5df460b1 GL |
1143 | /* Wait for data end? */ |
1144 | wait = sh_mmcif_read_block(host); | |
f985da17 GL |
1145 | break; |
1146 | case MMCIF_WAIT_FOR_MWRITE: | |
5df460b1 GL |
1147 | /* Wait data to write? */ |
1148 | wait = sh_mmcif_mwrite_block(host); | |
f985da17 GL |
1149 | break; |
1150 | case MMCIF_WAIT_FOR_WRITE: | |
5df460b1 GL |
1151 | /* Wait for data end? */ |
1152 | wait = sh_mmcif_write_block(host); | |
f985da17 GL |
1153 | break; |
1154 | case MMCIF_WAIT_FOR_STOP: | |
1155 | if (host->sd_error) { | |
1156 | mrq->stop->error = sh_mmcif_error_manage(host); | |
1157 | break; | |
1158 | } | |
1159 | sh_mmcif_get_cmd12response(host, mrq->stop); | |
1160 | mrq->stop->error = 0; | |
1161 | break; | |
1162 | case MMCIF_WAIT_FOR_READ_END: | |
1163 | case MMCIF_WAIT_FOR_WRITE_END: | |
1164 | if (host->sd_error) | |
91ab252a | 1165 | mrq->data->error = sh_mmcif_error_manage(host); |
f985da17 GL |
1166 | break; |
1167 | default: | |
1168 | BUG(); | |
1169 | } | |
1170 | ||
5df460b1 GL |
1171 | if (wait) { |
1172 | schedule_delayed_work(&host->timeout_work, host->timeout); | |
1173 | /* Wait for more data */ | |
1174 | return IRQ_HANDLED; | |
1175 | } | |
1176 | ||
f985da17 | 1177 | if (host->wait_for != MMCIF_WAIT_FOR_STOP) { |
91ab252a | 1178 | struct mmc_data *data = mrq->data; |
69983404 GL |
1179 | if (!mrq->cmd->error && data && !data->error) |
1180 | data->bytes_xfered = | |
1181 | data->blocks * data->blksz; | |
f985da17 | 1182 | |
69983404 | 1183 | if (mrq->stop && !mrq->cmd->error && (!data || !data->error)) { |
f985da17 | 1184 | sh_mmcif_stop_cmd(host, mrq); |
5df460b1 GL |
1185 | if (!mrq->stop->error) { |
1186 | schedule_delayed_work(&host->timeout_work, host->timeout); | |
f985da17 | 1187 | return IRQ_HANDLED; |
5df460b1 | 1188 | } |
f985da17 GL |
1189 | } |
1190 | } | |
1191 | ||
1192 | host->wait_for = MMCIF_WAIT_FOR_REQUEST; | |
1193 | host->state = STATE_IDLE; | |
69983404 | 1194 | host->mrq = NULL; |
f985da17 GL |
1195 | mmc_request_done(host->mmc, mrq); |
1196 | ||
1197 | return IRQ_HANDLED; | |
1198 | } | |
1199 | ||
fdc50a94 YG |
1200 | static irqreturn_t sh_mmcif_intr(int irq, void *dev_id) |
1201 | { | |
1202 | struct sh_mmcif_host *host = dev_id; | |
aa0787a9 | 1203 | u32 state; |
fdc50a94 YG |
1204 | int err = 0; |
1205 | ||
487d9fc5 | 1206 | state = sh_mmcif_readl(host->addr, MMCIF_CE_INT); |
fdc50a94 | 1207 | |
8a8284a9 GL |
1208 | if (state & INT_ERR_STS) { |
1209 | /* error interrupts - process first */ | |
1210 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state); | |
1211 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state); | |
1212 | err = 1; | |
1213 | } else if (state & INT_RBSYE) { | |
487d9fc5 MD |
1214 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, |
1215 | ~(INT_RBSYE | INT_CRSPE)); | |
fdc50a94 YG |
1216 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MRBSYE); |
1217 | } else if (state & INT_CRSPE) { | |
487d9fc5 | 1218 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_CRSPE); |
fdc50a94 YG |
1219 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCRSPE); |
1220 | } else if (state & INT_BUFREN) { | |
487d9fc5 | 1221 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFREN); |
fdc50a94 YG |
1222 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFREN); |
1223 | } else if (state & INT_BUFWEN) { | |
487d9fc5 | 1224 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFWEN); |
fdc50a94 YG |
1225 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFWEN); |
1226 | } else if (state & INT_CMD12DRE) { | |
487d9fc5 | 1227 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, |
fdc50a94 YG |
1228 | ~(INT_CMD12DRE | INT_CMD12RBE | |
1229 | INT_CMD12CRE | INT_BUFRE)); | |
1230 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12DRE); | |
1231 | } else if (state & INT_BUFRE) { | |
487d9fc5 | 1232 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~INT_BUFRE); |
fdc50a94 YG |
1233 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MBUFRE); |
1234 | } else if (state & INT_DTRANE) { | |
7a7eb328 GL |
1235 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, |
1236 | ~(INT_CMD12DRE | INT_CMD12RBE | | |
1237 | INT_CMD12CRE | INT_DTRANE)); | |
fdc50a94 YG |
1238 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MDTRANE); |
1239 | } else if (state & INT_CMD12RBE) { | |
487d9fc5 | 1240 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, |
fdc50a94 YG |
1241 | ~(INT_CMD12RBE | INT_CMD12CRE)); |
1242 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, MASK_MCMD12RBE); | |
fdc50a94 | 1243 | } else { |
faca6648 | 1244 | dev_dbg(&host->pd->dev, "Unsupported interrupt: 0x%x\n", state); |
487d9fc5 | 1245 | sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state); |
fdc50a94 YG |
1246 | sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state); |
1247 | err = 1; | |
1248 | } | |
1249 | if (err) { | |
aa0787a9 | 1250 | host->sd_error = true; |
e47bf32a | 1251 | dev_dbg(&host->pd->dev, "int err state = %08x\n", state); |
fdc50a94 | 1252 | } |
f985da17 GL |
1253 | if (state & ~(INT_CMD12RBE | INT_CMD12CRE)) { |
1254 | if (!host->dma_active) | |
1255 | return IRQ_WAKE_THREAD; | |
1256 | else if (host->sd_error) | |
1257 | mmcif_dma_complete(host); | |
1258 | } else { | |
aa0787a9 | 1259 | dev_dbg(&host->pd->dev, "Unexpected IRQ 0x%x\n", state); |
f985da17 | 1260 | } |
fdc50a94 YG |
1261 | |
1262 | return IRQ_HANDLED; | |
1263 | } | |
1264 | ||
f985da17 GL |
1265 | static void mmcif_timeout_work(struct work_struct *work) |
1266 | { | |
1267 | struct delayed_work *d = container_of(work, struct delayed_work, work); | |
1268 | struct sh_mmcif_host *host = container_of(d, struct sh_mmcif_host, timeout_work); | |
1269 | struct mmc_request *mrq = host->mrq; | |
1270 | ||
1271 | if (host->dying) | |
1272 | /* Don't run after mmc_remove_host() */ | |
1273 | return; | |
1274 | ||
1275 | /* | |
1276 | * Handle races with cancel_delayed_work(), unless | |
1277 | * cancel_delayed_work_sync() is used | |
1278 | */ | |
1279 | switch (host->wait_for) { | |
1280 | case MMCIF_WAIT_FOR_CMD: | |
1281 | mrq->cmd->error = sh_mmcif_error_manage(host); | |
1282 | break; | |
1283 | case MMCIF_WAIT_FOR_STOP: | |
1284 | mrq->stop->error = sh_mmcif_error_manage(host); | |
1285 | break; | |
1286 | case MMCIF_WAIT_FOR_MREAD: | |
1287 | case MMCIF_WAIT_FOR_MWRITE: | |
1288 | case MMCIF_WAIT_FOR_READ: | |
1289 | case MMCIF_WAIT_FOR_WRITE: | |
1290 | case MMCIF_WAIT_FOR_READ_END: | |
1291 | case MMCIF_WAIT_FOR_WRITE_END: | |
69983404 | 1292 | mrq->data->error = sh_mmcif_error_manage(host); |
f985da17 GL |
1293 | break; |
1294 | default: | |
1295 | BUG(); | |
1296 | } | |
1297 | ||
1298 | host->state = STATE_IDLE; | |
1299 | host->wait_for = MMCIF_WAIT_FOR_REQUEST; | |
f985da17 GL |
1300 | host->mrq = NULL; |
1301 | mmc_request_done(host->mmc, mrq); | |
1302 | } | |
1303 | ||
7d17baa0 GL |
1304 | static void sh_mmcif_init_ocr(struct sh_mmcif_host *host) |
1305 | { | |
1306 | struct sh_mmcif_plat_data *pd = host->pd->dev.platform_data; | |
1307 | struct mmc_host *mmc = host->mmc; | |
1308 | ||
1309 | mmc_regulator_get_supply(mmc); | |
1310 | ||
bf68a812 GL |
1311 | if (!pd) |
1312 | return; | |
1313 | ||
7d17baa0 GL |
1314 | if (!mmc->ocr_avail) |
1315 | mmc->ocr_avail = pd->ocr; | |
1316 | else if (pd->ocr) | |
1317 | dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n"); | |
1318 | } | |
1319 | ||
c3be1efd | 1320 | static int sh_mmcif_probe(struct platform_device *pdev) |
fdc50a94 YG |
1321 | { |
1322 | int ret = 0, irq[2]; | |
1323 | struct mmc_host *mmc; | |
e47bf32a | 1324 | struct sh_mmcif_host *host; |
e1aae2eb | 1325 | struct sh_mmcif_plat_data *pd = pdev->dev.platform_data; |
fdc50a94 YG |
1326 | struct resource *res; |
1327 | void __iomem *reg; | |
2cd5b3e0 | 1328 | const char *name; |
fdc50a94 YG |
1329 | |
1330 | irq[0] = platform_get_irq(pdev, 0); | |
1331 | irq[1] = platform_get_irq(pdev, 1); | |
2cd5b3e0 | 1332 | if (irq[0] < 0) { |
e47bf32a | 1333 | dev_err(&pdev->dev, "Get irq error\n"); |
fdc50a94 YG |
1334 | return -ENXIO; |
1335 | } | |
1336 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1337 | if (!res) { | |
1338 | dev_err(&pdev->dev, "platform_get_resource error.\n"); | |
1339 | return -ENXIO; | |
1340 | } | |
1341 | reg = ioremap(res->start, resource_size(res)); | |
1342 | if (!reg) { | |
1343 | dev_err(&pdev->dev, "ioremap error.\n"); | |
1344 | return -ENOMEM; | |
1345 | } | |
e1aae2eb | 1346 | |
fdc50a94 YG |
1347 | mmc = mmc_alloc_host(sizeof(struct sh_mmcif_host), &pdev->dev); |
1348 | if (!mmc) { | |
1349 | ret = -ENOMEM; | |
e1aae2eb | 1350 | goto ealloch; |
fdc50a94 YG |
1351 | } |
1352 | host = mmc_priv(mmc); | |
1353 | host->mmc = mmc; | |
1354 | host->addr = reg; | |
f9fd54f2 | 1355 | host->timeout = msecs_to_jiffies(1000); |
fdc50a94 | 1356 | |
fdc50a94 YG |
1357 | host->pd = pdev; |
1358 | ||
3b0beafc | 1359 | spin_lock_init(&host->lock); |
fdc50a94 YG |
1360 | |
1361 | mmc->ops = &sh_mmcif_ops; | |
7d17baa0 GL |
1362 | sh_mmcif_init_ocr(host); |
1363 | ||
a812ba0f | 1364 | mmc->caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_WAIT_WHILE_BUSY; |
bf68a812 | 1365 | if (pd && pd->caps) |
fdc50a94 | 1366 | mmc->caps |= pd->caps; |
a782d688 | 1367 | mmc->max_segs = 32; |
fdc50a94 | 1368 | mmc->max_blk_size = 512; |
a782d688 GL |
1369 | mmc->max_req_size = PAGE_CACHE_SIZE * mmc->max_segs; |
1370 | mmc->max_blk_count = mmc->max_req_size / mmc->max_blk_size; | |
fdc50a94 YG |
1371 | mmc->max_seg_size = mmc->max_req_size; |
1372 | ||
fdc50a94 | 1373 | platform_set_drvdata(pdev, host); |
a782d688 | 1374 | |
faca6648 GL |
1375 | pm_runtime_enable(&pdev->dev); |
1376 | host->power = false; | |
1377 | ||
047a9ce7 | 1378 | host->hclk = clk_get(&pdev->dev, NULL); |
b289174f GL |
1379 | if (IS_ERR(host->hclk)) { |
1380 | ret = PTR_ERR(host->hclk); | |
047a9ce7 | 1381 | dev_err(&pdev->dev, "cannot get clock: %d\n", ret); |
b289174f GL |
1382 | goto eclkget; |
1383 | } | |
a6609267 GL |
1384 | ret = sh_mmcif_clk_update(host); |
1385 | if (ret < 0) | |
1386 | goto eclkupdate; | |
b289174f | 1387 | |
faca6648 GL |
1388 | ret = pm_runtime_resume(&pdev->dev); |
1389 | if (ret < 0) | |
e1aae2eb | 1390 | goto eresume; |
a782d688 | 1391 | |
5ba85d95 | 1392 | INIT_DELAYED_WORK(&host->timeout_work, mmcif_timeout_work); |
fdc50a94 | 1393 | |
b289174f | 1394 | sh_mmcif_sync_reset(host); |
3b0beafc GL |
1395 | sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); |
1396 | ||
2cd5b3e0 SK |
1397 | name = irq[1] < 0 ? dev_name(&pdev->dev) : "sh_mmc:error"; |
1398 | ret = request_threaded_irq(irq[0], sh_mmcif_intr, sh_mmcif_irqt, 0, name, host); | |
fdc50a94 | 1399 | if (ret) { |
2cd5b3e0 | 1400 | dev_err(&pdev->dev, "request_irq error (%s)\n", name); |
e1aae2eb | 1401 | goto ereqirq0; |
fdc50a94 | 1402 | } |
2cd5b3e0 SK |
1403 | if (irq[1] >= 0) { |
1404 | ret = request_threaded_irq(irq[1], sh_mmcif_intr, sh_mmcif_irqt, | |
1405 | 0, "sh_mmc:int", host); | |
1406 | if (ret) { | |
1407 | dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n"); | |
1408 | goto ereqirq1; | |
1409 | } | |
fdc50a94 YG |
1410 | } |
1411 | ||
e480606a GL |
1412 | if (pd && pd->use_cd_gpio) { |
1413 | ret = mmc_gpio_request_cd(mmc, pd->cd_gpio); | |
1414 | if (ret < 0) | |
1415 | goto erqcd; | |
1416 | } | |
1417 | ||
b289174f | 1418 | clk_disable(host->hclk); |
5ba85d95 GL |
1419 | ret = mmc_add_host(mmc); |
1420 | if (ret < 0) | |
e1aae2eb | 1421 | goto emmcaddh; |
fdc50a94 | 1422 | |
efe6a8ad RW |
1423 | dev_pm_qos_expose_latency_limit(&pdev->dev, 100); |
1424 | ||
e47bf32a GL |
1425 | dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION); |
1426 | dev_dbg(&pdev->dev, "chip ver H'%04x\n", | |
487d9fc5 | 1427 | sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff); |
fdc50a94 YG |
1428 | return ret; |
1429 | ||
e1aae2eb | 1430 | emmcaddh: |
e480606a | 1431 | erqcd: |
2cd5b3e0 SK |
1432 | if (irq[1] >= 0) |
1433 | free_irq(irq[1], host); | |
e1aae2eb | 1434 | ereqirq1: |
5ba85d95 | 1435 | free_irq(irq[0], host); |
e1aae2eb | 1436 | ereqirq0: |
faca6648 | 1437 | pm_runtime_suspend(&pdev->dev); |
e1aae2eb | 1438 | eresume: |
fdc50a94 | 1439 | clk_disable(host->hclk); |
a6609267 | 1440 | eclkupdate: |
b289174f | 1441 | clk_put(host->hclk); |
e1aae2eb | 1442 | eclkget: |
b289174f | 1443 | pm_runtime_disable(&pdev->dev); |
fdc50a94 | 1444 | mmc_free_host(mmc); |
e1aae2eb GL |
1445 | ealloch: |
1446 | iounmap(reg); | |
fdc50a94 YG |
1447 | return ret; |
1448 | } | |
1449 | ||
6e0ee714 | 1450 | static int sh_mmcif_remove(struct platform_device *pdev) |
fdc50a94 YG |
1451 | { |
1452 | struct sh_mmcif_host *host = platform_get_drvdata(pdev); | |
1453 | int irq[2]; | |
1454 | ||
f985da17 | 1455 | host->dying = true; |
b289174f | 1456 | clk_enable(host->hclk); |
faca6648 | 1457 | pm_runtime_get_sync(&pdev->dev); |
fdc50a94 | 1458 | |
efe6a8ad RW |
1459 | dev_pm_qos_hide_latency_limit(&pdev->dev); |
1460 | ||
faca6648 | 1461 | mmc_remove_host(host->mmc); |
3b0beafc GL |
1462 | sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); |
1463 | ||
f985da17 GL |
1464 | /* |
1465 | * FIXME: cancel_delayed_work(_sync)() and free_irq() race with the | |
1466 | * mmc_remove_host() call above. But swapping order doesn't help either | |
1467 | * (a query on the linux-mmc mailing list didn't bring any replies). | |
1468 | */ | |
1469 | cancel_delayed_work_sync(&host->timeout_work); | |
1470 | ||
fdc50a94 YG |
1471 | if (host->addr) |
1472 | iounmap(host->addr); | |
1473 | ||
aa0787a9 GL |
1474 | irq[0] = platform_get_irq(pdev, 0); |
1475 | irq[1] = platform_get_irq(pdev, 1); | |
fdc50a94 YG |
1476 | |
1477 | free_irq(irq[0], host); | |
2cd5b3e0 SK |
1478 | if (irq[1] >= 0) |
1479 | free_irq(irq[1], host); | |
fdc50a94 | 1480 | |
aa0787a9 GL |
1481 | platform_set_drvdata(pdev, NULL); |
1482 | ||
a0d28ba0 | 1483 | clk_disable(host->hclk); |
fdc50a94 | 1484 | mmc_free_host(host->mmc); |
faca6648 GL |
1485 | pm_runtime_put_sync(&pdev->dev); |
1486 | pm_runtime_disable(&pdev->dev); | |
fdc50a94 YG |
1487 | |
1488 | return 0; | |
1489 | } | |
1490 | ||
faca6648 GL |
1491 | #ifdef CONFIG_PM |
1492 | static int sh_mmcif_suspend(struct device *dev) | |
1493 | { | |
b289174f | 1494 | struct sh_mmcif_host *host = dev_get_drvdata(dev); |
faca6648 GL |
1495 | int ret = mmc_suspend_host(host->mmc); |
1496 | ||
b289174f | 1497 | if (!ret) |
faca6648 | 1498 | sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); |
faca6648 GL |
1499 | |
1500 | return ret; | |
1501 | } | |
1502 | ||
1503 | static int sh_mmcif_resume(struct device *dev) | |
1504 | { | |
b289174f | 1505 | struct sh_mmcif_host *host = dev_get_drvdata(dev); |
faca6648 GL |
1506 | |
1507 | return mmc_resume_host(host->mmc); | |
1508 | } | |
1509 | #else | |
1510 | #define sh_mmcif_suspend NULL | |
1511 | #define sh_mmcif_resume NULL | |
1512 | #endif /* CONFIG_PM */ | |
1513 | ||
bf68a812 GL |
1514 | static const struct of_device_id mmcif_of_match[] = { |
1515 | { .compatible = "renesas,sh-mmcif" }, | |
1516 | { } | |
1517 | }; | |
1518 | MODULE_DEVICE_TABLE(of, mmcif_of_match); | |
1519 | ||
faca6648 GL |
1520 | static const struct dev_pm_ops sh_mmcif_dev_pm_ops = { |
1521 | .suspend = sh_mmcif_suspend, | |
1522 | .resume = sh_mmcif_resume, | |
1523 | }; | |
1524 | ||
fdc50a94 YG |
1525 | static struct platform_driver sh_mmcif_driver = { |
1526 | .probe = sh_mmcif_probe, | |
1527 | .remove = sh_mmcif_remove, | |
1528 | .driver = { | |
1529 | .name = DRIVER_NAME, | |
faca6648 | 1530 | .pm = &sh_mmcif_dev_pm_ops, |
bf68a812 GL |
1531 | .owner = THIS_MODULE, |
1532 | .of_match_table = mmcif_of_match, | |
fdc50a94 YG |
1533 | }, |
1534 | }; | |
1535 | ||
d1f81a64 | 1536 | module_platform_driver(sh_mmcif_driver); |
fdc50a94 YG |
1537 | |
1538 | MODULE_DESCRIPTION("SuperH on-chip MMC/eMMC interface driver"); | |
1539 | MODULE_LICENSE("GPL"); | |
aa0787a9 | 1540 | MODULE_ALIAS("platform:" DRIVER_NAME); |
fdc50a94 | 1541 | MODULE_AUTHOR("Yusuke Goda <yusuke.goda.sx@renesas.com>"); |