Commit | Line | Data |
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b6147490 GL |
1 | /* |
2 | * linux/drivers/mmc/host/tmio_mmc_pio.c | |
3 | * | |
bf96208f WS |
4 | * Copyright (C) 2016 Sang Engineering, Wolfram Sang |
5 | * Copyright (C) 2015-16 Renesas Electronics Corporation | |
b6147490 GL |
6 | * Copyright (C) 2011 Guennadi Liakhovetski |
7 | * Copyright (C) 2007 Ian Molton | |
8 | * Copyright (C) 2004 Ian Molton | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * Driver for the MMC / SD / SDIO IP found in: | |
15 | * | |
16 | * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs | |
17 | * | |
18 | * This driver draws mainly on scattered spec sheets, Reverse engineering | |
19 | * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit | |
20 | * support). (Further 4 bit support from a later datasheet). | |
21 | * | |
22 | * TODO: | |
23 | * Investigate using a workqueue for PIO transfers | |
24 | * Eliminate FIXMEs | |
25 | * SDIO support | |
26 | * Better Power management | |
27 | * Handle MMC errors better | |
28 | * double buffer support | |
29 | * | |
30 | */ | |
31 | ||
32 | #include <linux/delay.h> | |
33 | #include <linux/device.h> | |
34 | #include <linux/highmem.h> | |
35 | #include <linux/interrupt.h> | |
36 | #include <linux/io.h> | |
37 | #include <linux/irq.h> | |
38 | #include <linux/mfd/tmio.h> | |
39 | #include <linux/mmc/host.h> | |
0f506a96 | 40 | #include <linux/mmc/mmc.h> |
fd0ea65d | 41 | #include <linux/mmc/slot-gpio.h> |
b6147490 GL |
42 | #include <linux/module.h> |
43 | #include <linux/pagemap.h> | |
44 | #include <linux/platform_device.h> | |
c419e611 | 45 | #include <linux/pm_qos.h> |
e6ee7182 | 46 | #include <linux/pm_runtime.h> |
619b08d4 | 47 | #include <linux/regulator/consumer.h> |
b8d11962 | 48 | #include <linux/mmc/sdio.h> |
b6147490 | 49 | #include <linux/scatterlist.h> |
b6147490 | 50 | #include <linux/spinlock.h> |
e3de2be7 | 51 | #include <linux/workqueue.h> |
b6147490 GL |
52 | |
53 | #include "tmio_mmc.h" | |
54 | ||
b6147490 GL |
55 | void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
56 | { | |
54680fe7 | 57 | host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); |
2c54506b | 58 | sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
b6147490 GL |
59 | } |
60 | ||
61 | void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) | |
62 | { | |
54680fe7 | 63 | host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); |
2c54506b | 64 | sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
b6147490 GL |
65 | } |
66 | ||
67 | static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) | |
68 | { | |
2c54506b | 69 | sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i); |
b6147490 GL |
70 | } |
71 | ||
72 | static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) | |
73 | { | |
74 | host->sg_len = data->sg_len; | |
75 | host->sg_ptr = data->sg; | |
76 | host->sg_orig = data->sg; | |
77 | host->sg_off = 0; | |
78 | } | |
79 | ||
80 | static int tmio_mmc_next_sg(struct tmio_mmc_host *host) | |
81 | { | |
82 | host->sg_ptr = sg_next(host->sg_ptr); | |
83 | host->sg_off = 0; | |
84 | return --host->sg_len; | |
85 | } | |
86 | ||
0df9d2ea TK |
87 | #define CMDREQ_TIMEOUT 5000 |
88 | ||
b6147490 GL |
89 | #ifdef CONFIG_MMC_DEBUG |
90 | ||
91 | #define STATUS_TO_TEXT(a, status, i) \ | |
92 | do { \ | |
93 | if (status & TMIO_STAT_##a) { \ | |
94 | if (i++) \ | |
95 | printk(" | "); \ | |
96 | printk(#a); \ | |
97 | } \ | |
98 | } while (0) | |
99 | ||
100 | static void pr_debug_status(u32 status) | |
101 | { | |
102 | int i = 0; | |
a3c76eb9 | 103 | pr_debug("status: %08x = ", status); |
b6147490 GL |
104 | STATUS_TO_TEXT(CARD_REMOVE, status, i); |
105 | STATUS_TO_TEXT(CARD_INSERT, status, i); | |
106 | STATUS_TO_TEXT(SIGSTATE, status, i); | |
107 | STATUS_TO_TEXT(WRPROTECT, status, i); | |
108 | STATUS_TO_TEXT(CARD_REMOVE_A, status, i); | |
109 | STATUS_TO_TEXT(CARD_INSERT_A, status, i); | |
110 | STATUS_TO_TEXT(SIGSTATE_A, status, i); | |
111 | STATUS_TO_TEXT(CMD_IDX_ERR, status, i); | |
112 | STATUS_TO_TEXT(STOPBIT_ERR, status, i); | |
113 | STATUS_TO_TEXT(ILL_FUNC, status, i); | |
114 | STATUS_TO_TEXT(CMD_BUSY, status, i); | |
115 | STATUS_TO_TEXT(CMDRESPEND, status, i); | |
116 | STATUS_TO_TEXT(DATAEND, status, i); | |
117 | STATUS_TO_TEXT(CRCFAIL, status, i); | |
118 | STATUS_TO_TEXT(DATATIMEOUT, status, i); | |
119 | STATUS_TO_TEXT(CMDTIMEOUT, status, i); | |
120 | STATUS_TO_TEXT(RXOVERFLOW, status, i); | |
121 | STATUS_TO_TEXT(TXUNDERRUN, status, i); | |
122 | STATUS_TO_TEXT(RXRDY, status, i); | |
123 | STATUS_TO_TEXT(TXRQ, status, i); | |
124 | STATUS_TO_TEXT(ILL_ACCESS, status, i); | |
125 | printk("\n"); | |
126 | } | |
127 | ||
128 | #else | |
129 | #define pr_debug_status(s) do { } while (0) | |
130 | #endif | |
131 | ||
132 | static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) | |
133 | { | |
134 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
135 | ||
7501c431 UH |
136 | if (enable && !host->sdio_irq_enabled) { |
137 | /* Keep device active while SDIO irq is enabled */ | |
138 | pm_runtime_get_sync(mmc_dev(mmc)); | |
139 | host->sdio_irq_enabled = true; | |
140 | ||
54680fe7 SH |
141 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & |
142 | ~TMIO_SDIO_STAT_IOIRQ; | |
b6147490 | 143 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); |
54680fe7 | 144 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
7501c431 | 145 | } else if (!enable && host->sdio_irq_enabled) { |
54680fe7 SH |
146 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; |
147 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); | |
b6147490 | 148 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); |
7501c431 UH |
149 | |
150 | host->sdio_irq_enabled = false; | |
0369483e UH |
151 | pm_runtime_mark_last_busy(mmc_dev(mmc)); |
152 | pm_runtime_put_autosuspend(mmc_dev(mmc)); | |
b6147490 GL |
153 | } |
154 | } | |
155 | ||
7fbc030d WS |
156 | static void tmio_mmc_clk_start(struct tmio_mmc_host *host) |
157 | { | |
158 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN | | |
159 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); | |
3d376fb2 | 160 | msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 10); |
7fbc030d WS |
161 | |
162 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { | |
163 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); | |
164 | msleep(10); | |
165 | } | |
166 | } | |
167 | ||
148634d2 WS |
168 | static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) |
169 | { | |
170 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) { | |
171 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); | |
172 | msleep(10); | |
173 | } | |
174 | ||
175 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & | |
176 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); | |
3d376fb2 | 177 | msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 10); |
148634d2 WS |
178 | } |
179 | ||
ae12d250 UH |
180 | static void tmio_mmc_set_clock(struct tmio_mmc_host *host, |
181 | unsigned int new_clock) | |
b6147490 GL |
182 | { |
183 | u32 clk = 0, clock; | |
184 | ||
148634d2 WS |
185 | if (new_clock == 0) { |
186 | tmio_mmc_clk_stop(host); | |
187 | return; | |
188 | } | |
2fb55956 | 189 | |
148634d2 WS |
190 | if (host->clk_update) |
191 | clock = host->clk_update(host, new_clock) / 512; | |
192 | else | |
193 | clock = host->mmc->f_min; | |
da29fe2b | 194 | |
148634d2 WS |
195 | for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1) |
196 | clock <<= 1; | |
197 | ||
198 | /* 1/1 clock is option */ | |
199 | if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1)) | |
200 | clk |= 0xff; | |
b6147490 GL |
201 | |
202 | if (host->set_clk_div) | |
bf96208f | 203 | host->set_clk_div(host->pdev, (clk >> 22) & 1); |
b6147490 | 204 | |
14d5828f WS |
205 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN & |
206 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); | |
bf96208f | 207 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK); |
3d376fb2 | 208 | if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2)) |
04e24b80 | 209 | msleep(10); |
7fbc030d WS |
210 | |
211 | tmio_mmc_clk_start(host); | |
b6147490 GL |
212 | } |
213 | ||
b6147490 GL |
214 | static void tmio_mmc_reset(struct tmio_mmc_host *host) |
215 | { | |
216 | /* FIXME - should we set stop clock reg here */ | |
217 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); | |
5d60e500 | 218 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) |
69d1fe18 | 219 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); |
b6147490 GL |
220 | msleep(10); |
221 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); | |
5d60e500 | 222 | if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) |
69d1fe18 | 223 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); |
b6147490 GL |
224 | msleep(10); |
225 | } | |
226 | ||
227 | static void tmio_mmc_reset_work(struct work_struct *work) | |
228 | { | |
229 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, | |
230 | delayed_reset_work.work); | |
231 | struct mmc_request *mrq; | |
232 | unsigned long flags; | |
233 | ||
234 | spin_lock_irqsave(&host->lock, flags); | |
235 | mrq = host->mrq; | |
236 | ||
df3ef2d3 GL |
237 | /* |
238 | * is request already finished? Since we use a non-blocking | |
239 | * cancel_delayed_work(), it can happen, that a .set_ios() call preempts | |
240 | * us, so, have to check for IS_ERR(host->mrq) | |
241 | */ | |
242 | if (IS_ERR_OR_NULL(mrq) | |
b6147490 | 243 | || time_is_after_jiffies(host->last_req_ts + |
0df9d2ea | 244 | msecs_to_jiffies(CMDREQ_TIMEOUT))) { |
b6147490 GL |
245 | spin_unlock_irqrestore(&host->lock, flags); |
246 | return; | |
247 | } | |
248 | ||
249 | dev_warn(&host->pdev->dev, | |
250 | "timeout waiting for hardware interrupt (CMD%u)\n", | |
251 | mrq->cmd->opcode); | |
252 | ||
253 | if (host->data) | |
254 | host->data->error = -ETIMEDOUT; | |
255 | else if (host->cmd) | |
256 | host->cmd->error = -ETIMEDOUT; | |
257 | else | |
258 | mrq->cmd->error = -ETIMEDOUT; | |
259 | ||
260 | host->cmd = NULL; | |
261 | host->data = NULL; | |
b6147490 GL |
262 | host->force_pio = false; |
263 | ||
264 | spin_unlock_irqrestore(&host->lock, flags); | |
265 | ||
266 | tmio_mmc_reset(host); | |
267 | ||
df3ef2d3 GL |
268 | /* Ready for new calls */ |
269 | host->mrq = NULL; | |
270 | ||
e3de2be7 | 271 | tmio_mmc_abort_dma(host); |
b6147490 GL |
272 | mmc_request_done(host->mmc, mrq); |
273 | } | |
274 | ||
df3ef2d3 | 275 | /* called with host->lock held, interrupts disabled */ |
b6147490 GL |
276 | static void tmio_mmc_finish_request(struct tmio_mmc_host *host) |
277 | { | |
b9269fdd GL |
278 | struct mmc_request *mrq; |
279 | unsigned long flags; | |
b6147490 | 280 | |
b9269fdd GL |
281 | spin_lock_irqsave(&host->lock, flags); |
282 | ||
283 | mrq = host->mrq; | |
284 | if (IS_ERR_OR_NULL(mrq)) { | |
285 | spin_unlock_irqrestore(&host->lock, flags); | |
b6147490 | 286 | return; |
b9269fdd | 287 | } |
b6147490 | 288 | |
b6147490 GL |
289 | host->cmd = NULL; |
290 | host->data = NULL; | |
291 | host->force_pio = false; | |
292 | ||
293 | cancel_delayed_work(&host->delayed_reset_work); | |
294 | ||
df3ef2d3 | 295 | host->mrq = NULL; |
b9269fdd | 296 | spin_unlock_irqrestore(&host->lock, flags); |
df3ef2d3 | 297 | |
e3de2be7 GL |
298 | if (mrq->cmd->error || (mrq->data && mrq->data->error)) |
299 | tmio_mmc_abort_dma(host); | |
300 | ||
b6147490 GL |
301 | mmc_request_done(host->mmc, mrq); |
302 | } | |
303 | ||
b9269fdd GL |
304 | static void tmio_mmc_done_work(struct work_struct *work) |
305 | { | |
306 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, | |
307 | done); | |
308 | tmio_mmc_finish_request(host); | |
309 | } | |
310 | ||
b6147490 GL |
311 | /* These are the bitmasks the tmio chip requires to implement the MMC response |
312 | * types. Note that R1 and R6 are the same in this scheme. */ | |
313 | #define APP_CMD 0x0040 | |
314 | #define RESP_NONE 0x0300 | |
315 | #define RESP_R1 0x0400 | |
316 | #define RESP_R1B 0x0500 | |
317 | #define RESP_R2 0x0600 | |
318 | #define RESP_R3 0x0700 | |
319 | #define DATA_PRESENT 0x0800 | |
320 | #define TRANSFER_READ 0x1000 | |
321 | #define TRANSFER_MULTI 0x2000 | |
322 | #define SECURITY_CMD 0x4000 | |
b8d11962 | 323 | #define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */ |
b6147490 GL |
324 | |
325 | static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd) | |
326 | { | |
327 | struct mmc_data *data = host->data; | |
328 | int c = cmd->opcode; | |
e23cd53c | 329 | u32 irq_mask = TMIO_MASK_CMD; |
b6147490 | 330 | |
0f506a96 GL |
331 | /* CMD12 is handled by hardware */ |
332 | if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) { | |
b6147490 GL |
333 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001); |
334 | return 0; | |
335 | } | |
336 | ||
337 | switch (mmc_resp_type(cmd)) { | |
338 | case MMC_RSP_NONE: c |= RESP_NONE; break; | |
339 | case MMC_RSP_R1: c |= RESP_R1; break; | |
340 | case MMC_RSP_R1B: c |= RESP_R1B; break; | |
341 | case MMC_RSP_R2: c |= RESP_R2; break; | |
342 | case MMC_RSP_R3: c |= RESP_R3; break; | |
343 | default: | |
344 | pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); | |
345 | return -EINVAL; | |
346 | } | |
347 | ||
348 | host->cmd = cmd; | |
349 | ||
350 | /* FIXME - this seems to be ok commented out but the spec suggest this bit | |
351 | * should be set when issuing app commands. | |
352 | * if(cmd->flags & MMC_FLAG_ACMD) | |
353 | * c |= APP_CMD; | |
354 | */ | |
355 | if (data) { | |
356 | c |= DATA_PRESENT; | |
357 | if (data->blocks > 1) { | |
358 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100); | |
359 | c |= TRANSFER_MULTI; | |
b8d11962 SU |
360 | |
361 | /* | |
362 | * Disable auto CMD12 at IO_RW_EXTENDED when | |
363 | * multiple block transfer | |
364 | */ | |
365 | if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) && | |
366 | (cmd->opcode == SD_IO_RW_EXTENDED)) | |
367 | c |= NO_CMD12_ISSUE; | |
b6147490 GL |
368 | } |
369 | if (data->flags & MMC_DATA_READ) | |
370 | c |= TRANSFER_READ; | |
371 | } | |
372 | ||
e23cd53c GL |
373 | if (!host->native_hotplug) |
374 | irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); | |
375 | tmio_mmc_enable_mmc_irqs(host, irq_mask); | |
b6147490 GL |
376 | |
377 | /* Fire off the command */ | |
2c54506b | 378 | sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg); |
b6147490 GL |
379 | sd_ctrl_write16(host, CTL_SD_CMD, c); |
380 | ||
381 | return 0; | |
382 | } | |
383 | ||
b9bd7ff8 KM |
384 | static void tmio_mmc_transfer_data(struct tmio_mmc_host *host, |
385 | unsigned short *buf, | |
386 | unsigned int count) | |
387 | { | |
388 | int is_read = host->data->flags & MMC_DATA_READ; | |
389 | u8 *buf8; | |
390 | ||
391 | /* | |
392 | * Transfer the data | |
393 | */ | |
394 | if (is_read) | |
395 | sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); | |
396 | else | |
397 | sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); | |
398 | ||
399 | /* if count was even number */ | |
400 | if (!(count & 0x1)) | |
401 | return; | |
402 | ||
403 | /* if count was odd number */ | |
404 | buf8 = (u8 *)(buf + (count >> 1)); | |
405 | ||
406 | /* | |
407 | * FIXME | |
408 | * | |
409 | * driver and this function are assuming that | |
410 | * it is used as little endian | |
411 | */ | |
412 | if (is_read) | |
413 | *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff; | |
414 | else | |
415 | sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8); | |
416 | } | |
417 | ||
b6147490 GL |
418 | /* |
419 | * This chip always returns (at least?) as much data as you ask for. | |
420 | * I'm unsure what happens if you ask for less than a block. This should be | |
25985edc | 421 | * looked into to ensure that a funny length read doesn't hose the controller. |
b6147490 GL |
422 | */ |
423 | static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) | |
424 | { | |
425 | struct mmc_data *data = host->data; | |
426 | void *sg_virt; | |
427 | unsigned short *buf; | |
428 | unsigned int count; | |
429 | unsigned long flags; | |
430 | ||
431 | if ((host->chan_tx || host->chan_rx) && !host->force_pio) { | |
432 | pr_err("PIO IRQ in DMA mode!\n"); | |
433 | return; | |
434 | } else if (!data) { | |
435 | pr_debug("Spurious PIO IRQ\n"); | |
436 | return; | |
437 | } | |
438 | ||
439 | sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); | |
440 | buf = (unsigned short *)(sg_virt + host->sg_off); | |
441 | ||
442 | count = host->sg_ptr->length - host->sg_off; | |
443 | if (count > data->blksz) | |
444 | count = data->blksz; | |
445 | ||
446 | pr_debug("count: %08x offset: %08x flags %08x\n", | |
447 | count, host->sg_off, data->flags); | |
448 | ||
449 | /* Transfer the data */ | |
b9bd7ff8 | 450 | tmio_mmc_transfer_data(host, buf, count); |
b6147490 GL |
451 | |
452 | host->sg_off += count; | |
453 | ||
454 | tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); | |
455 | ||
456 | if (host->sg_off == host->sg_ptr->length) | |
457 | tmio_mmc_next_sg(host); | |
458 | ||
459 | return; | |
460 | } | |
461 | ||
462 | static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) | |
463 | { | |
464 | if (host->sg_ptr == &host->bounce_sg) { | |
465 | unsigned long flags; | |
466 | void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); | |
467 | memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); | |
468 | tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); | |
469 | } | |
470 | } | |
471 | ||
472 | /* needs to be called with host->lock held */ | |
473 | void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) | |
474 | { | |
475 | struct mmc_data *data = host->data; | |
476 | struct mmc_command *stop; | |
477 | ||
478 | host->data = NULL; | |
479 | ||
480 | if (!data) { | |
481 | dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); | |
482 | return; | |
483 | } | |
484 | stop = data->stop; | |
485 | ||
486 | /* FIXME - return correct transfer count on errors */ | |
487 | if (!data->error) | |
488 | data->bytes_xfered = data->blocks * data->blksz; | |
489 | else | |
490 | data->bytes_xfered = 0; | |
491 | ||
492 | pr_debug("Completed data request\n"); | |
493 | ||
494 | /* | |
495 | * FIXME: other drivers allow an optional stop command of any given type | |
496 | * which we dont do, as the chip can auto generate them. | |
497 | * Perhaps we can be smarter about when to use auto CMD12 and | |
498 | * only issue the auto request when we know this is the desired | |
499 | * stop command, allowing fallback to the stop command the | |
500 | * upper layers expect. For now, we do what works. | |
501 | */ | |
502 | ||
503 | if (data->flags & MMC_DATA_READ) { | |
504 | if (host->chan_rx && !host->force_pio) | |
505 | tmio_mmc_check_bounce_buffer(host); | |
506 | dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", | |
507 | host->mrq); | |
508 | } else { | |
509 | dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", | |
510 | host->mrq); | |
511 | } | |
512 | ||
513 | if (stop) { | |
0f506a96 | 514 | if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg) |
b6147490 GL |
515 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000); |
516 | else | |
517 | BUG(); | |
518 | } | |
519 | ||
b9269fdd | 520 | schedule_work(&host->done); |
b6147490 GL |
521 | } |
522 | ||
523 | static void tmio_mmc_data_irq(struct tmio_mmc_host *host) | |
524 | { | |
525 | struct mmc_data *data; | |
526 | spin_lock(&host->lock); | |
527 | data = host->data; | |
528 | ||
529 | if (!data) | |
530 | goto out; | |
531 | ||
532 | if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { | |
2c54506b | 533 | u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); |
81e888da SU |
534 | bool done = false; |
535 | ||
b6147490 GL |
536 | /* |
537 | * Has all data been written out yet? Testing on SuperH showed, | |
538 | * that in most cases the first interrupt comes already with the | |
539 | * BUSY status bit clear, but on some operations, like mount or | |
540 | * in the beginning of a write / sync / umount, there is one | |
541 | * DATAEND interrupt with the BUSY bit set, in this cases | |
542 | * waiting for one more interrupt fixes the problem. | |
543 | */ | |
81e888da | 544 | if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) { |
a21553c9 | 545 | if (status & TMIO_STAT_SCLKDIVEN) |
81e888da SU |
546 | done = true; |
547 | } else { | |
548 | if (!(status & TMIO_STAT_CMD_BUSY)) | |
549 | done = true; | |
550 | } | |
551 | ||
552 | if (done) { | |
b6147490 GL |
553 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
554 | tasklet_schedule(&host->dma_complete); | |
555 | } | |
556 | } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { | |
557 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); | |
558 | tasklet_schedule(&host->dma_complete); | |
559 | } else { | |
560 | tmio_mmc_do_data_irq(host); | |
561 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); | |
562 | } | |
563 | out: | |
564 | spin_unlock(&host->lock); | |
565 | } | |
566 | ||
567 | static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, | |
568 | unsigned int stat) | |
569 | { | |
570 | struct mmc_command *cmd = host->cmd; | |
571 | int i, addr; | |
572 | ||
573 | spin_lock(&host->lock); | |
574 | ||
575 | if (!host->cmd) { | |
576 | pr_debug("Spurious CMD irq\n"); | |
577 | goto out; | |
578 | } | |
579 | ||
580 | host->cmd = NULL; | |
581 | ||
582 | /* This controller is sicker than the PXA one. Not only do we need to | |
583 | * drop the top 8 bits of the first response word, we also need to | |
584 | * modify the order of the response for short response command types. | |
585 | */ | |
586 | ||
587 | for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) | |
2c54506b | 588 | cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr); |
b6147490 GL |
589 | |
590 | if (cmd->flags & MMC_RSP_136) { | |
591 | cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); | |
592 | cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); | |
593 | cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); | |
594 | cmd->resp[3] <<= 8; | |
595 | } else if (cmd->flags & MMC_RSP_R3) { | |
596 | cmd->resp[0] = cmd->resp[3]; | |
597 | } | |
598 | ||
599 | if (stat & TMIO_STAT_CMDTIMEOUT) | |
600 | cmd->error = -ETIMEDOUT; | |
601 | else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) | |
602 | cmd->error = -EILSEQ; | |
603 | ||
604 | /* If there is data to handle we enable data IRQs here, and | |
605 | * we will ultimatley finish the request in the data_end handler. | |
606 | * If theres no data or we encountered an error, finish now. | |
607 | */ | |
608 | if (host->data && !cmd->error) { | |
609 | if (host->data->flags & MMC_DATA_READ) { | |
610 | if (host->force_pio || !host->chan_rx) | |
611 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); | |
612 | else | |
613 | tasklet_schedule(&host->dma_issue); | |
614 | } else { | |
615 | if (host->force_pio || !host->chan_tx) | |
616 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); | |
617 | else | |
618 | tasklet_schedule(&host->dma_issue); | |
619 | } | |
620 | } else { | |
b9269fdd | 621 | schedule_work(&host->done); |
b6147490 GL |
622 | } |
623 | ||
624 | out: | |
625 | spin_unlock(&host->lock); | |
626 | } | |
627 | ||
7729c7a2 SH |
628 | static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, |
629 | int ireg, int status) | |
630 | { | |
631 | struct mmc_host *mmc = host->mmc; | |
b6147490 | 632 | |
e312eb1e PP |
633 | /* Card insert / remove attempts */ |
634 | if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { | |
635 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | | |
636 | TMIO_STAT_CARD_REMOVE); | |
71d111cd GL |
637 | if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || |
638 | ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && | |
639 | !work_pending(&mmc->detect.work)) | |
b9269fdd | 640 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); |
7729c7a2 | 641 | return true; |
b6147490 GL |
642 | } |
643 | ||
7729c7a2 SH |
644 | return false; |
645 | } | |
646 | ||
7729c7a2 SH |
647 | static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, |
648 | int ireg, int status) | |
649 | { | |
e312eb1e PP |
650 | /* Command completion */ |
651 | if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { | |
652 | tmio_mmc_ack_mmc_irqs(host, | |
653 | TMIO_STAT_CMDRESPEND | | |
654 | TMIO_STAT_CMDTIMEOUT); | |
655 | tmio_mmc_cmd_irq(host, status); | |
7729c7a2 | 656 | return true; |
e312eb1e | 657 | } |
b6147490 | 658 | |
e312eb1e PP |
659 | /* Data transfer */ |
660 | if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { | |
661 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); | |
662 | tmio_mmc_pio_irq(host); | |
7729c7a2 | 663 | return true; |
e312eb1e | 664 | } |
b6147490 | 665 | |
e312eb1e PP |
666 | /* Data transfer completion */ |
667 | if (ireg & TMIO_STAT_DATAEND) { | |
668 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); | |
669 | tmio_mmc_data_irq(host); | |
7729c7a2 | 670 | return true; |
b6147490 | 671 | } |
e312eb1e | 672 | |
7729c7a2 SH |
673 | return false; |
674 | } | |
675 | ||
4da98670 | 676 | static void tmio_mmc_sdio_irq(int irq, void *devid) |
7729c7a2 SH |
677 | { |
678 | struct tmio_mmc_host *host = devid; | |
679 | struct mmc_host *mmc = host->mmc; | |
680 | struct tmio_mmc_data *pdata = host->pdata; | |
681 | unsigned int ireg, status; | |
6b98757e | 682 | unsigned int sdio_status; |
7729c7a2 SH |
683 | |
684 | if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) | |
4da98670 | 685 | return; |
7729c7a2 SH |
686 | |
687 | status = sd_ctrl_read16(host, CTL_SDIO_STATUS); | |
688 | ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask; | |
689 | ||
6b98757e SU |
690 | sdio_status = status & ~TMIO_SDIO_MASK_ALL; |
691 | if (pdata->flags & TMIO_MMC_SDIO_STATUS_QUIRK) | |
692 | sdio_status |= 6; | |
693 | ||
694 | sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status); | |
7729c7a2 SH |
695 | |
696 | if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) | |
697 | mmc_signal_sdio_irq(mmc); | |
7729c7a2 | 698 | } |
7729c7a2 SH |
699 | |
700 | irqreturn_t tmio_mmc_irq(int irq, void *devid) | |
701 | { | |
702 | struct tmio_mmc_host *host = devid; | |
703 | unsigned int ireg, status; | |
704 | ||
2c54506b | 705 | status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS); |
95840126 WS |
706 | ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; |
707 | ||
708 | pr_debug_status(status); | |
709 | pr_debug_status(ireg); | |
710 | ||
711 | /* Clear the status except the interrupt status */ | |
2c54506b | 712 | sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ); |
7729c7a2 | 713 | |
7729c7a2 SH |
714 | if (__tmio_mmc_card_detect_irq(host, ireg, status)) |
715 | return IRQ_HANDLED; | |
716 | if (__tmio_mmc_sdcard_irq(host, ireg, status)) | |
717 | return IRQ_HANDLED; | |
718 | ||
719 | tmio_mmc_sdio_irq(irq, devid); | |
b6147490 | 720 | |
b6147490 GL |
721 | return IRQ_HANDLED; |
722 | } | |
8e7bfdb3 | 723 | EXPORT_SYMBOL(tmio_mmc_irq); |
b6147490 GL |
724 | |
725 | static int tmio_mmc_start_data(struct tmio_mmc_host *host, | |
726 | struct mmc_data *data) | |
727 | { | |
728 | struct tmio_mmc_data *pdata = host->pdata; | |
729 | ||
730 | pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", | |
731 | data->blksz, data->blocks); | |
732 | ||
733 | /* Some hardware cannot perform 2 byte requests in 4 bit mode */ | |
734 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) { | |
735 | int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; | |
736 | ||
737 | if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { | |
738 | pr_err("%s: %d byte block unsupported in 4 bit mode\n", | |
739 | mmc_hostname(host->mmc), data->blksz); | |
740 | return -EINVAL; | |
741 | } | |
742 | } | |
743 | ||
744 | tmio_mmc_init_sg(host, data); | |
745 | host->data = data; | |
746 | ||
747 | /* Set transfer length / blocksize */ | |
748 | sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); | |
749 | sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); | |
750 | ||
751 | tmio_mmc_start_dma(host, data); | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | /* Process requests from the MMC layer */ | |
757 | static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
758 | { | |
759 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
df3ef2d3 | 760 | unsigned long flags; |
b6147490 GL |
761 | int ret; |
762 | ||
df3ef2d3 GL |
763 | spin_lock_irqsave(&host->lock, flags); |
764 | ||
765 | if (host->mrq) { | |
b6147490 | 766 | pr_debug("request not null\n"); |
df3ef2d3 GL |
767 | if (IS_ERR(host->mrq)) { |
768 | spin_unlock_irqrestore(&host->lock, flags); | |
769 | mrq->cmd->error = -EAGAIN; | |
770 | mmc_request_done(mmc, mrq); | |
771 | return; | |
772 | } | |
773 | } | |
b6147490 GL |
774 | |
775 | host->last_req_ts = jiffies; | |
776 | wmb(); | |
777 | host->mrq = mrq; | |
778 | ||
df3ef2d3 GL |
779 | spin_unlock_irqrestore(&host->lock, flags); |
780 | ||
b6147490 GL |
781 | if (mrq->data) { |
782 | ret = tmio_mmc_start_data(host, mrq->data); | |
783 | if (ret) | |
784 | goto fail; | |
785 | } | |
786 | ||
787 | ret = tmio_mmc_start_command(host, mrq->cmd); | |
788 | if (!ret) { | |
789 | schedule_delayed_work(&host->delayed_reset_work, | |
0df9d2ea | 790 | msecs_to_jiffies(CMDREQ_TIMEOUT)); |
b6147490 GL |
791 | return; |
792 | } | |
793 | ||
794 | fail: | |
b6147490 | 795 | host->force_pio = false; |
df3ef2d3 | 796 | host->mrq = NULL; |
b6147490 GL |
797 | mrq->cmd->error = ret; |
798 | mmc_request_done(mmc, mrq); | |
799 | } | |
800 | ||
2fb55956 | 801 | static int tmio_mmc_clk_enable(struct tmio_mmc_host *host) |
8c102a96 | 802 | { |
4fe2ec57 | 803 | if (!host->clk_enable) |
8c102a96 GL |
804 | return -ENOTSUPP; |
805 | ||
2fb55956 | 806 | return host->clk_enable(host); |
8c102a96 GL |
807 | } |
808 | ||
619b08d4 | 809 | static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd) |
b958a67c GL |
810 | { |
811 | struct mmc_host *mmc = host->mmc; | |
619b08d4 GL |
812 | int ret = 0; |
813 | ||
814 | /* .set_ios() is returning void, so, no chance to report an error */ | |
b958a67c | 815 | |
9d731e75 CB |
816 | if (host->set_pwr) |
817 | host->set_pwr(host->pdev, 1); | |
818 | ||
619b08d4 GL |
819 | if (!IS_ERR(mmc->supply.vmmc)) { |
820 | ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); | |
821 | /* | |
822 | * Attention: empiric value. With a b43 WiFi SDIO card this | |
823 | * delay proved necessary for reliable card-insertion probing. | |
824 | * 100us were not enough. Is this the same 140us delay, as in | |
825 | * tmio_mmc_set_ios()? | |
826 | */ | |
827 | udelay(200); | |
828 | } | |
829 | /* | |
830 | * It seems, VccQ should be switched on after Vcc, this is also what the | |
831 | * omap_hsmmc.c driver does. | |
832 | */ | |
833 | if (!IS_ERR(mmc->supply.vqmmc) && !ret) { | |
6d1d6b47 | 834 | ret = regulator_enable(mmc->supply.vqmmc); |
619b08d4 GL |
835 | udelay(200); |
836 | } | |
6d1d6b47 GL |
837 | |
838 | if (ret < 0) | |
839 | dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n", | |
840 | ret); | |
619b08d4 GL |
841 | } |
842 | ||
843 | static void tmio_mmc_power_off(struct tmio_mmc_host *host) | |
844 | { | |
845 | struct mmc_host *mmc = host->mmc; | |
846 | ||
847 | if (!IS_ERR(mmc->supply.vqmmc)) | |
848 | regulator_disable(mmc->supply.vqmmc); | |
849 | ||
b958a67c | 850 | if (!IS_ERR(mmc->supply.vmmc)) |
619b08d4 | 851 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); |
9d731e75 CB |
852 | |
853 | if (host->set_pwr) | |
854 | host->set_pwr(host->pdev, 0); | |
b958a67c GL |
855 | } |
856 | ||
9ae4ed7d UH |
857 | static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host, |
858 | unsigned char bus_width) | |
859 | { | |
860 | switch (bus_width) { | |
861 | case MMC_BUS_WIDTH_1: | |
862 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0); | |
863 | break; | |
864 | case MMC_BUS_WIDTH_4: | |
865 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0); | |
866 | break; | |
867 | } | |
868 | } | |
869 | ||
b6147490 GL |
870 | /* Set MMC clock / power. |
871 | * Note: This controller uses a simple divider scheme therefore it cannot | |
872 | * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as | |
873 | * MMC wont run that fast, it has to be clocked at 12MHz which is the next | |
874 | * slowest setting. | |
875 | */ | |
876 | static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
877 | { | |
878 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
4932bd64 | 879 | struct device *dev = &host->pdev->dev; |
df3ef2d3 GL |
880 | unsigned long flags; |
881 | ||
b9269fdd GL |
882 | mutex_lock(&host->ios_lock); |
883 | ||
df3ef2d3 GL |
884 | spin_lock_irqsave(&host->lock, flags); |
885 | if (host->mrq) { | |
886 | if (IS_ERR(host->mrq)) { | |
4932bd64 | 887 | dev_dbg(dev, |
df3ef2d3 GL |
888 | "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", |
889 | current->comm, task_pid_nr(current), | |
890 | ios->clock, ios->power_mode); | |
891 | host->mrq = ERR_PTR(-EINTR); | |
892 | } else { | |
4932bd64 | 893 | dev_dbg(dev, |
df3ef2d3 GL |
894 | "%s.%d: CMD%u active since %lu, now %lu!\n", |
895 | current->comm, task_pid_nr(current), | |
896 | host->mrq->cmd->opcode, host->last_req_ts, jiffies); | |
897 | } | |
898 | spin_unlock_irqrestore(&host->lock, flags); | |
b9269fdd GL |
899 | |
900 | mutex_unlock(&host->ios_lock); | |
df3ef2d3 GL |
901 | return; |
902 | } | |
903 | ||
904 | host->mrq = ERR_PTR(-EBUSY); | |
905 | ||
906 | spin_unlock_irqrestore(&host->lock, flags); | |
b6147490 | 907 | |
3b292bb0 UH |
908 | switch (ios->power_mode) { |
909 | case MMC_POWER_OFF: | |
910 | tmio_mmc_power_off(host); | |
911 | tmio_mmc_clk_stop(host); | |
912 | break; | |
913 | case MMC_POWER_UP: | |
3b292bb0 | 914 | tmio_mmc_power_on(host, ios->vdd); |
7fbc030d | 915 | tmio_mmc_set_clock(host, ios->clock); |
9ae4ed7d | 916 | tmio_mmc_set_bus_width(host, ios->bus_width); |
3b292bb0 UH |
917 | break; |
918 | case MMC_POWER_ON: | |
919 | tmio_mmc_set_clock(host, ios->clock); | |
3b292bb0 UH |
920 | tmio_mmc_set_bus_width(host, ios->bus_width); |
921 | break; | |
922 | } | |
b6147490 GL |
923 | |
924 | /* Let things settle. delay taken from winCE driver */ | |
925 | udelay(140); | |
df3ef2d3 GL |
926 | if (PTR_ERR(host->mrq) == -EINTR) |
927 | dev_dbg(&host->pdev->dev, | |
928 | "%s.%d: IOS interrupted: clk %u, mode %u", | |
929 | current->comm, task_pid_nr(current), | |
930 | ios->clock, ios->power_mode); | |
931 | host->mrq = NULL; | |
b9269fdd | 932 | |
ae12d250 UH |
933 | host->clk_cache = ios->clock; |
934 | ||
b9269fdd | 935 | mutex_unlock(&host->ios_lock); |
b6147490 GL |
936 | } |
937 | ||
938 | static int tmio_mmc_get_ro(struct mmc_host *mmc) | |
939 | { | |
940 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
941 | struct tmio_mmc_data *pdata = host->pdata; | |
3071cafb GL |
942 | int ret = mmc_gpio_get_ro(mmc); |
943 | if (ret >= 0) | |
944 | return ret; | |
b6147490 | 945 | |
0369483e | 946 | ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || |
2c54506b | 947 | (sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); |
0369483e UH |
948 | |
949 | return ret; | |
b6147490 GL |
950 | } |
951 | ||
bbf0208d KM |
952 | static int tmio_multi_io_quirk(struct mmc_card *card, |
953 | unsigned int direction, int blk_size) | |
954 | { | |
955 | struct tmio_mmc_host *host = mmc_priv(card->host); | |
bbf0208d | 956 | |
85c02ddd KM |
957 | if (host->multi_io_quirk) |
958 | return host->multi_io_quirk(card, direction, blk_size); | |
bbf0208d KM |
959 | |
960 | return blk_size; | |
961 | } | |
962 | ||
452e5eef WS |
963 | static int tmio_mmc_card_busy(struct mmc_host *mmc) |
964 | { | |
965 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
966 | ||
83e95351 | 967 | return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0); |
452e5eef WS |
968 | } |
969 | ||
970 | static struct mmc_host_ops tmio_mmc_ops = { | |
b6147490 GL |
971 | .request = tmio_mmc_request, |
972 | .set_ios = tmio_mmc_set_ios, | |
973 | .get_ro = tmio_mmc_get_ro, | |
2b63b341 | 974 | .get_cd = mmc_gpio_get_cd, |
b6147490 | 975 | .enable_sdio_irq = tmio_mmc_enable_sdio_irq, |
452e5eef | 976 | .card_busy = tmio_mmc_card_busy, |
bbf0208d | 977 | .multi_io_quirk = tmio_multi_io_quirk, |
b6147490 GL |
978 | }; |
979 | ||
05fae4a7 | 980 | static int tmio_mmc_init_ocr(struct tmio_mmc_host *host) |
b958a67c GL |
981 | { |
982 | struct tmio_mmc_data *pdata = host->pdata; | |
983 | struct mmc_host *mmc = host->mmc; | |
984 | ||
985 | mmc_regulator_get_supply(mmc); | |
986 | ||
05fae4a7 | 987 | /* use ocr_mask if no regulator */ |
b958a67c | 988 | if (!mmc->ocr_avail) |
05fae4a7 KM |
989 | mmc->ocr_avail = pdata->ocr_mask; |
990 | ||
991 | /* | |
992 | * try again. | |
993 | * There is possibility that regulator has not been probed | |
994 | */ | |
995 | if (!mmc->ocr_avail) | |
996 | return -EPROBE_DEFER; | |
997 | ||
998 | return 0; | |
b958a67c GL |
999 | } |
1000 | ||
5a00a971 GL |
1001 | static void tmio_mmc_of_parse(struct platform_device *pdev, |
1002 | struct tmio_mmc_data *pdata) | |
1003 | { | |
1004 | const struct device_node *np = pdev->dev.of_node; | |
1005 | if (!np) | |
1006 | return; | |
1007 | ||
1008 | if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL)) | |
1009 | pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE; | |
1010 | } | |
1011 | ||
94b110af KM |
1012 | struct tmio_mmc_host* |
1013 | tmio_mmc_host_alloc(struct platform_device *pdev) | |
b6147490 | 1014 | { |
94b110af | 1015 | struct tmio_mmc_host *host; |
b6147490 | 1016 | struct mmc_host *mmc; |
94b110af KM |
1017 | |
1018 | mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); | |
1019 | if (!mmc) | |
1020 | return NULL; | |
1021 | ||
1022 | host = mmc_priv(mmc); | |
1023 | host->mmc = mmc; | |
1024 | host->pdev = pdev; | |
1025 | ||
1026 | return host; | |
1027 | } | |
1028 | EXPORT_SYMBOL(tmio_mmc_host_alloc); | |
1029 | ||
1030 | void tmio_mmc_host_free(struct tmio_mmc_host *host) | |
1031 | { | |
1032 | mmc_free_host(host->mmc); | |
94b110af KM |
1033 | } |
1034 | EXPORT_SYMBOL(tmio_mmc_host_free); | |
1035 | ||
1036 | int tmio_mmc_host_probe(struct tmio_mmc_host *_host, | |
1037 | struct tmio_mmc_data *pdata) | |
1038 | { | |
1039 | struct platform_device *pdev = _host->pdev; | |
1040 | struct mmc_host *mmc = _host->mmc; | |
b6147490 GL |
1041 | struct resource *res_ctl; |
1042 | int ret; | |
1043 | u32 irq_mask = TMIO_MASK_CMD; | |
1044 | ||
5a00a971 GL |
1045 | tmio_mmc_of_parse(pdev, pdata); |
1046 | ||
7b952137 | 1047 | if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT)) |
dfe9a229 | 1048 | _host->write16_hook = NULL; |
7b952137 | 1049 | |
b6147490 GL |
1050 | res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
1051 | if (!res_ctl) | |
1052 | return -EINVAL; | |
1053 | ||
274a752b SB |
1054 | ret = mmc_of_parse(mmc); |
1055 | if (ret < 0) | |
1056 | goto host_free; | |
5a00a971 | 1057 | |
b6147490 | 1058 | _host->pdata = pdata; |
b6147490 GL |
1059 | platform_set_drvdata(pdev, mmc); |
1060 | ||
9d731e75 | 1061 | _host->set_pwr = pdata->set_pwr; |
b6147490 GL |
1062 | _host->set_clk_div = pdata->set_clk_div; |
1063 | ||
05fae4a7 KM |
1064 | ret = tmio_mmc_init_ocr(_host); |
1065 | if (ret < 0) | |
1066 | goto host_free; | |
1067 | ||
7df56bbb IM |
1068 | _host->ctl = devm_ioremap(&pdev->dev, |
1069 | res_ctl->start, resource_size(res_ctl)); | |
b6147490 GL |
1070 | if (!_host->ctl) { |
1071 | ret = -ENOMEM; | |
1072 | goto host_free; | |
1073 | } | |
1074 | ||
452e5eef | 1075 | tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch; |
b6147490 | 1076 | mmc->ops = &tmio_mmc_ops; |
452e5eef | 1077 | |
5a00a971 | 1078 | mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities; |
dd006b30 | 1079 | mmc->caps2 |= pdata->capabilities2; |
b6147490 GL |
1080 | mmc->max_segs = 32; |
1081 | mmc->max_blk_size = 512; | |
09cbfeaf | 1082 | mmc->max_blk_count = (PAGE_SIZE / mmc->max_blk_size) * |
b6147490 GL |
1083 | mmc->max_segs; |
1084 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
1085 | mmc->max_seg_size = mmc->max_req_size; | |
b6147490 | 1086 | |
c8be24c2 | 1087 | _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD || |
2b1ac5c2 | 1088 | mmc->caps & MMC_CAP_NEEDS_POLL || |
5a00a971 GL |
1089 | mmc->caps & MMC_CAP_NONREMOVABLE || |
1090 | mmc->slot.cd_irq >= 0); | |
2b1ac5c2 | 1091 | |
2fb55956 | 1092 | if (tmio_mmc_clk_enable(_host) < 0) { |
8c102a96 GL |
1093 | mmc->f_max = pdata->hclk; |
1094 | mmc->f_min = mmc->f_max / 512; | |
1095 | } | |
1096 | ||
bb98d9d1 SS |
1097 | /* |
1098 | * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from | |
1099 | * looping forever... | |
1100 | */ | |
1101 | if (mmc->f_min == 0) { | |
1102 | ret = -EINVAL; | |
1103 | goto host_free; | |
1104 | } | |
1105 | ||
cbb18b30 | 1106 | /* |
0369483e UH |
1107 | * While using internal tmio hardware logic for card detection, we need |
1108 | * to ensure it stays powered for it to work. | |
cbb18b30 | 1109 | */ |
2b1ac5c2 | 1110 | if (_host->native_hotplug) |
cbb18b30 BH |
1111 | pm_runtime_get_noresume(&pdev->dev); |
1112 | ||
b6147490 GL |
1113 | tmio_mmc_clk_stop(_host); |
1114 | tmio_mmc_reset(_host); | |
1115 | ||
2c54506b | 1116 | _host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK); |
b6147490 | 1117 | tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); |
e0337cc8 GL |
1118 | |
1119 | /* Unmask the IRQs we want to know about */ | |
1120 | if (!_host->chan_rx) | |
1121 | irq_mask |= TMIO_MASK_READOP; | |
1122 | if (!_host->chan_tx) | |
1123 | irq_mask |= TMIO_MASK_WRITEOP; | |
1124 | if (!_host->native_hotplug) | |
1125 | irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); | |
1126 | ||
1127 | _host->sdcard_irq_mask &= ~irq_mask; | |
1128 | ||
7501c431 UH |
1129 | _host->sdio_irq_enabled = false; |
1130 | if (pdata->flags & TMIO_MMC_SDIO_IRQ) { | |
1131 | _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; | |
1132 | sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask); | |
1133 | sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0000); | |
1134 | } | |
b6147490 | 1135 | |
b6147490 | 1136 | spin_lock_init(&_host->lock); |
b9269fdd | 1137 | mutex_init(&_host->ios_lock); |
b6147490 GL |
1138 | |
1139 | /* Init delayed work for request timeouts */ | |
1140 | INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); | |
b9269fdd | 1141 | INIT_WORK(&_host->done, tmio_mmc_done_work); |
b6147490 GL |
1142 | |
1143 | /* See if we also get DMA */ | |
1144 | tmio_mmc_request_dma(_host, pdata); | |
1145 | ||
0369483e UH |
1146 | pm_runtime_set_active(&pdev->dev); |
1147 | pm_runtime_set_autosuspend_delay(&pdev->dev, 50); | |
1148 | pm_runtime_use_autosuspend(&pdev->dev); | |
1149 | pm_runtime_enable(&pdev->dev); | |
1150 | ||
8c102a96 | 1151 | ret = mmc_add_host(mmc); |
8c102a96 GL |
1152 | if (ret < 0) { |
1153 | tmio_mmc_host_remove(_host); | |
1154 | return ret; | |
1155 | } | |
b6147490 | 1156 | |
c419e611 RW |
1157 | dev_pm_qos_expose_latency_limit(&pdev->dev, 100); |
1158 | ||
c8be24c2 | 1159 | if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { |
214fc309 | 1160 | ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0); |
c8be24c2 GL |
1161 | if (ret < 0) { |
1162 | tmio_mmc_host_remove(_host); | |
1163 | return ret; | |
1164 | } | |
d4d11449 | 1165 | mmc_gpiod_request_cd_irq(mmc); |
c8be24c2 GL |
1166 | } |
1167 | ||
b6147490 GL |
1168 | return 0; |
1169 | ||
b6147490 | 1170 | host_free: |
b6147490 GL |
1171 | |
1172 | return ret; | |
1173 | } | |
1174 | EXPORT_SYMBOL(tmio_mmc_host_probe); | |
1175 | ||
1176 | void tmio_mmc_host_remove(struct tmio_mmc_host *host) | |
1177 | { | |
e6ee7182 | 1178 | struct platform_device *pdev = host->pdev; |
c8be24c2 GL |
1179 | struct mmc_host *mmc = host->mmc; |
1180 | ||
2b1ac5c2 | 1181 | if (!host->native_hotplug) |
7311bef0 GL |
1182 | pm_runtime_get_sync(&pdev->dev); |
1183 | ||
c419e611 RW |
1184 | dev_pm_qos_hide_latency_limit(&pdev->dev); |
1185 | ||
c8be24c2 | 1186 | mmc_remove_host(mmc); |
b9269fdd | 1187 | cancel_work_sync(&host->done); |
b6147490 GL |
1188 | cancel_delayed_work_sync(&host->delayed_reset_work); |
1189 | tmio_mmc_release_dma(host); | |
e6ee7182 | 1190 | |
e6ee7182 GL |
1191 | pm_runtime_put_sync(&pdev->dev); |
1192 | pm_runtime_disable(&pdev->dev); | |
b6147490 GL |
1193 | } |
1194 | EXPORT_SYMBOL(tmio_mmc_host_remove); | |
1195 | ||
9ade7dbf | 1196 | #ifdef CONFIG_PM |
7311bef0 GL |
1197 | int tmio_mmc_host_runtime_suspend(struct device *dev) |
1198 | { | |
ae12d250 UH |
1199 | struct mmc_host *mmc = dev_get_drvdata(dev); |
1200 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
1201 | ||
20e955c3 UH |
1202 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); |
1203 | ||
ae12d250 UH |
1204 | if (host->clk_cache) |
1205 | tmio_mmc_clk_stop(host); | |
1206 | ||
00452c11 | 1207 | if (host->clk_disable) |
0ea28210 | 1208 | host->clk_disable(host); |
ae12d250 | 1209 | |
7311bef0 GL |
1210 | return 0; |
1211 | } | |
1212 | EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend); | |
1213 | ||
1214 | int tmio_mmc_host_runtime_resume(struct device *dev) | |
1215 | { | |
1216 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1217 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
7311bef0 | 1218 | |
ae12d250 | 1219 | tmio_mmc_reset(host); |
2fb55956 | 1220 | tmio_mmc_clk_enable(host); |
ae12d250 | 1221 | |
7fbc030d | 1222 | if (host->clk_cache) |
ae12d250 | 1223 | tmio_mmc_set_clock(host, host->clk_cache); |
ae12d250 | 1224 | |
162f43e3 | 1225 | tmio_mmc_enable_dma(host, true); |
7311bef0 | 1226 | |
7311bef0 GL |
1227 | return 0; |
1228 | } | |
1229 | EXPORT_SYMBOL(tmio_mmc_host_runtime_resume); | |
710dec95 | 1230 | #endif |
7311bef0 | 1231 | |
b6147490 | 1232 | MODULE_LICENSE("GPL v2"); |