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b6147490 GL |
1 | /* |
2 | * linux/drivers/mmc/host/tmio_mmc_pio.c | |
3 | * | |
4 | * Copyright (C) 2011 Guennadi Liakhovetski | |
5 | * Copyright (C) 2007 Ian Molton | |
6 | * Copyright (C) 2004 Ian Molton | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Driver for the MMC / SD / SDIO IP found in: | |
13 | * | |
14 | * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs | |
15 | * | |
16 | * This driver draws mainly on scattered spec sheets, Reverse engineering | |
17 | * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit | |
18 | * support). (Further 4 bit support from a later datasheet). | |
19 | * | |
20 | * TODO: | |
21 | * Investigate using a workqueue for PIO transfers | |
22 | * Eliminate FIXMEs | |
23 | * SDIO support | |
24 | * Better Power management | |
25 | * Handle MMC errors better | |
26 | * double buffer support | |
27 | * | |
28 | */ | |
29 | ||
30 | #include <linux/delay.h> | |
31 | #include <linux/device.h> | |
32 | #include <linux/highmem.h> | |
33 | #include <linux/interrupt.h> | |
34 | #include <linux/io.h> | |
35 | #include <linux/irq.h> | |
36 | #include <linux/mfd/tmio.h> | |
37 | #include <linux/mmc/host.h> | |
0f506a96 | 38 | #include <linux/mmc/mmc.h> |
fd0ea65d | 39 | #include <linux/mmc/slot-gpio.h> |
cba179ae | 40 | #include <linux/mmc/tmio.h> |
b6147490 GL |
41 | #include <linux/module.h> |
42 | #include <linux/pagemap.h> | |
43 | #include <linux/platform_device.h> | |
c419e611 | 44 | #include <linux/pm_qos.h> |
e6ee7182 | 45 | #include <linux/pm_runtime.h> |
b6147490 | 46 | #include <linux/scatterlist.h> |
b6147490 | 47 | #include <linux/spinlock.h> |
e3de2be7 | 48 | #include <linux/workqueue.h> |
b6147490 GL |
49 | |
50 | #include "tmio_mmc.h" | |
51 | ||
b6147490 GL |
52 | void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
53 | { | |
54680fe7 SH |
54 | host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); |
55 | sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask); | |
b6147490 GL |
56 | } |
57 | ||
58 | void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) | |
59 | { | |
54680fe7 SH |
60 | host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); |
61 | sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask); | |
b6147490 GL |
62 | } |
63 | ||
64 | static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) | |
65 | { | |
66 | sd_ctrl_write32(host, CTL_STATUS, ~i); | |
67 | } | |
68 | ||
69 | static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) | |
70 | { | |
71 | host->sg_len = data->sg_len; | |
72 | host->sg_ptr = data->sg; | |
73 | host->sg_orig = data->sg; | |
74 | host->sg_off = 0; | |
75 | } | |
76 | ||
77 | static int tmio_mmc_next_sg(struct tmio_mmc_host *host) | |
78 | { | |
79 | host->sg_ptr = sg_next(host->sg_ptr); | |
80 | host->sg_off = 0; | |
81 | return --host->sg_len; | |
82 | } | |
83 | ||
84 | #ifdef CONFIG_MMC_DEBUG | |
85 | ||
86 | #define STATUS_TO_TEXT(a, status, i) \ | |
87 | do { \ | |
88 | if (status & TMIO_STAT_##a) { \ | |
89 | if (i++) \ | |
90 | printk(" | "); \ | |
91 | printk(#a); \ | |
92 | } \ | |
93 | } while (0) | |
94 | ||
95 | static void pr_debug_status(u32 status) | |
96 | { | |
97 | int i = 0; | |
a3c76eb9 | 98 | pr_debug("status: %08x = ", status); |
b6147490 GL |
99 | STATUS_TO_TEXT(CARD_REMOVE, status, i); |
100 | STATUS_TO_TEXT(CARD_INSERT, status, i); | |
101 | STATUS_TO_TEXT(SIGSTATE, status, i); | |
102 | STATUS_TO_TEXT(WRPROTECT, status, i); | |
103 | STATUS_TO_TEXT(CARD_REMOVE_A, status, i); | |
104 | STATUS_TO_TEXT(CARD_INSERT_A, status, i); | |
105 | STATUS_TO_TEXT(SIGSTATE_A, status, i); | |
106 | STATUS_TO_TEXT(CMD_IDX_ERR, status, i); | |
107 | STATUS_TO_TEXT(STOPBIT_ERR, status, i); | |
108 | STATUS_TO_TEXT(ILL_FUNC, status, i); | |
109 | STATUS_TO_TEXT(CMD_BUSY, status, i); | |
110 | STATUS_TO_TEXT(CMDRESPEND, status, i); | |
111 | STATUS_TO_TEXT(DATAEND, status, i); | |
112 | STATUS_TO_TEXT(CRCFAIL, status, i); | |
113 | STATUS_TO_TEXT(DATATIMEOUT, status, i); | |
114 | STATUS_TO_TEXT(CMDTIMEOUT, status, i); | |
115 | STATUS_TO_TEXT(RXOVERFLOW, status, i); | |
116 | STATUS_TO_TEXT(TXUNDERRUN, status, i); | |
117 | STATUS_TO_TEXT(RXRDY, status, i); | |
118 | STATUS_TO_TEXT(TXRQ, status, i); | |
119 | STATUS_TO_TEXT(ILL_ACCESS, status, i); | |
120 | printk("\n"); | |
121 | } | |
122 | ||
123 | #else | |
124 | #define pr_debug_status(s) do { } while (0) | |
125 | #endif | |
126 | ||
127 | static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) | |
128 | { | |
129 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
130 | ||
131 | if (enable) { | |
54680fe7 SH |
132 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & |
133 | ~TMIO_SDIO_STAT_IOIRQ; | |
b6147490 | 134 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); |
54680fe7 | 135 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
b6147490 | 136 | } else { |
54680fe7 SH |
137 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; |
138 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); | |
b6147490 | 139 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); |
b6147490 GL |
140 | } |
141 | } | |
142 | ||
143 | static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) | |
144 | { | |
145 | u32 clk = 0, clock; | |
146 | ||
147 | if (new_clock) { | |
148 | for (clock = host->mmc->f_min, clk = 0x80000080; | |
149 | new_clock >= (clock<<1); clk >>= 1) | |
150 | clock <<= 1; | |
151 | clk |= 0x100; | |
152 | } | |
153 | ||
154 | if (host->set_clk_div) | |
155 | host->set_clk_div(host->pdev, (clk>>22) & 1); | |
156 | ||
157 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff); | |
158 | } | |
159 | ||
160 | static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) | |
161 | { | |
69d1fe18 | 162 | struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); |
b6147490 | 163 | |
69d1fe18 GL |
164 | /* implicit BUG_ON(!res) */ |
165 | if (resource_size(res) > 0x100) { | |
166 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); | |
167 | msleep(10); | |
168 | } | |
d9b03421 | 169 | |
b6147490 GL |
170 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 & |
171 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); | |
172 | msleep(10); | |
173 | } | |
174 | ||
175 | static void tmio_mmc_clk_start(struct tmio_mmc_host *host) | |
176 | { | |
69d1fe18 | 177 | struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); |
b6147490 GL |
178 | |
179 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 | | |
180 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); | |
181 | msleep(10); | |
d9b03421 | 182 | |
69d1fe18 GL |
183 | /* implicit BUG_ON(!res) */ |
184 | if (resource_size(res) > 0x100) { | |
185 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); | |
186 | msleep(10); | |
187 | } | |
b6147490 GL |
188 | } |
189 | ||
190 | static void tmio_mmc_reset(struct tmio_mmc_host *host) | |
191 | { | |
69d1fe18 GL |
192 | struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); |
193 | ||
b6147490 GL |
194 | /* FIXME - should we set stop clock reg here */ |
195 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); | |
69d1fe18 GL |
196 | /* implicit BUG_ON(!res) */ |
197 | if (resource_size(res) > 0x100) | |
198 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); | |
b6147490 GL |
199 | msleep(10); |
200 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); | |
69d1fe18 GL |
201 | if (resource_size(res) > 0x100) |
202 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); | |
b6147490 GL |
203 | msleep(10); |
204 | } | |
205 | ||
206 | static void tmio_mmc_reset_work(struct work_struct *work) | |
207 | { | |
208 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, | |
209 | delayed_reset_work.work); | |
210 | struct mmc_request *mrq; | |
211 | unsigned long flags; | |
212 | ||
213 | spin_lock_irqsave(&host->lock, flags); | |
214 | mrq = host->mrq; | |
215 | ||
df3ef2d3 GL |
216 | /* |
217 | * is request already finished? Since we use a non-blocking | |
218 | * cancel_delayed_work(), it can happen, that a .set_ios() call preempts | |
219 | * us, so, have to check for IS_ERR(host->mrq) | |
220 | */ | |
221 | if (IS_ERR_OR_NULL(mrq) | |
b6147490 GL |
222 | || time_is_after_jiffies(host->last_req_ts + |
223 | msecs_to_jiffies(2000))) { | |
224 | spin_unlock_irqrestore(&host->lock, flags); | |
225 | return; | |
226 | } | |
227 | ||
228 | dev_warn(&host->pdev->dev, | |
229 | "timeout waiting for hardware interrupt (CMD%u)\n", | |
230 | mrq->cmd->opcode); | |
231 | ||
232 | if (host->data) | |
233 | host->data->error = -ETIMEDOUT; | |
234 | else if (host->cmd) | |
235 | host->cmd->error = -ETIMEDOUT; | |
236 | else | |
237 | mrq->cmd->error = -ETIMEDOUT; | |
238 | ||
239 | host->cmd = NULL; | |
240 | host->data = NULL; | |
b6147490 GL |
241 | host->force_pio = false; |
242 | ||
243 | spin_unlock_irqrestore(&host->lock, flags); | |
244 | ||
245 | tmio_mmc_reset(host); | |
246 | ||
df3ef2d3 GL |
247 | /* Ready for new calls */ |
248 | host->mrq = NULL; | |
249 | ||
e3de2be7 | 250 | tmio_mmc_abort_dma(host); |
b6147490 GL |
251 | mmc_request_done(host->mmc, mrq); |
252 | } | |
253 | ||
df3ef2d3 | 254 | /* called with host->lock held, interrupts disabled */ |
b6147490 GL |
255 | static void tmio_mmc_finish_request(struct tmio_mmc_host *host) |
256 | { | |
b9269fdd GL |
257 | struct mmc_request *mrq; |
258 | unsigned long flags; | |
b6147490 | 259 | |
b9269fdd GL |
260 | spin_lock_irqsave(&host->lock, flags); |
261 | ||
262 | mrq = host->mrq; | |
263 | if (IS_ERR_OR_NULL(mrq)) { | |
264 | spin_unlock_irqrestore(&host->lock, flags); | |
b6147490 | 265 | return; |
b9269fdd | 266 | } |
b6147490 | 267 | |
b6147490 GL |
268 | host->cmd = NULL; |
269 | host->data = NULL; | |
270 | host->force_pio = false; | |
271 | ||
272 | cancel_delayed_work(&host->delayed_reset_work); | |
273 | ||
df3ef2d3 | 274 | host->mrq = NULL; |
b9269fdd | 275 | spin_unlock_irqrestore(&host->lock, flags); |
df3ef2d3 | 276 | |
e3de2be7 GL |
277 | if (mrq->cmd->error || (mrq->data && mrq->data->error)) |
278 | tmio_mmc_abort_dma(host); | |
279 | ||
b6147490 GL |
280 | mmc_request_done(host->mmc, mrq); |
281 | } | |
282 | ||
b9269fdd GL |
283 | static void tmio_mmc_done_work(struct work_struct *work) |
284 | { | |
285 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, | |
286 | done); | |
287 | tmio_mmc_finish_request(host); | |
288 | } | |
289 | ||
b6147490 GL |
290 | /* These are the bitmasks the tmio chip requires to implement the MMC response |
291 | * types. Note that R1 and R6 are the same in this scheme. */ | |
292 | #define APP_CMD 0x0040 | |
293 | #define RESP_NONE 0x0300 | |
294 | #define RESP_R1 0x0400 | |
295 | #define RESP_R1B 0x0500 | |
296 | #define RESP_R2 0x0600 | |
297 | #define RESP_R3 0x0700 | |
298 | #define DATA_PRESENT 0x0800 | |
299 | #define TRANSFER_READ 0x1000 | |
300 | #define TRANSFER_MULTI 0x2000 | |
301 | #define SECURITY_CMD 0x4000 | |
302 | ||
303 | static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd) | |
304 | { | |
305 | struct mmc_data *data = host->data; | |
306 | int c = cmd->opcode; | |
e23cd53c | 307 | u32 irq_mask = TMIO_MASK_CMD; |
b6147490 | 308 | |
0f506a96 GL |
309 | /* CMD12 is handled by hardware */ |
310 | if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) { | |
b6147490 GL |
311 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001); |
312 | return 0; | |
313 | } | |
314 | ||
315 | switch (mmc_resp_type(cmd)) { | |
316 | case MMC_RSP_NONE: c |= RESP_NONE; break; | |
317 | case MMC_RSP_R1: c |= RESP_R1; break; | |
318 | case MMC_RSP_R1B: c |= RESP_R1B; break; | |
319 | case MMC_RSP_R2: c |= RESP_R2; break; | |
320 | case MMC_RSP_R3: c |= RESP_R3; break; | |
321 | default: | |
322 | pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); | |
323 | return -EINVAL; | |
324 | } | |
325 | ||
326 | host->cmd = cmd; | |
327 | ||
328 | /* FIXME - this seems to be ok commented out but the spec suggest this bit | |
329 | * should be set when issuing app commands. | |
330 | * if(cmd->flags & MMC_FLAG_ACMD) | |
331 | * c |= APP_CMD; | |
332 | */ | |
333 | if (data) { | |
334 | c |= DATA_PRESENT; | |
335 | if (data->blocks > 1) { | |
336 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100); | |
337 | c |= TRANSFER_MULTI; | |
338 | } | |
339 | if (data->flags & MMC_DATA_READ) | |
340 | c |= TRANSFER_READ; | |
341 | } | |
342 | ||
e23cd53c GL |
343 | if (!host->native_hotplug) |
344 | irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); | |
345 | tmio_mmc_enable_mmc_irqs(host, irq_mask); | |
b6147490 GL |
346 | |
347 | /* Fire off the command */ | |
348 | sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg); | |
349 | sd_ctrl_write16(host, CTL_SD_CMD, c); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | /* | |
355 | * This chip always returns (at least?) as much data as you ask for. | |
356 | * I'm unsure what happens if you ask for less than a block. This should be | |
25985edc | 357 | * looked into to ensure that a funny length read doesn't hose the controller. |
b6147490 GL |
358 | */ |
359 | static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) | |
360 | { | |
361 | struct mmc_data *data = host->data; | |
362 | void *sg_virt; | |
363 | unsigned short *buf; | |
364 | unsigned int count; | |
365 | unsigned long flags; | |
366 | ||
367 | if ((host->chan_tx || host->chan_rx) && !host->force_pio) { | |
368 | pr_err("PIO IRQ in DMA mode!\n"); | |
369 | return; | |
370 | } else if (!data) { | |
371 | pr_debug("Spurious PIO IRQ\n"); | |
372 | return; | |
373 | } | |
374 | ||
375 | sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); | |
376 | buf = (unsigned short *)(sg_virt + host->sg_off); | |
377 | ||
378 | count = host->sg_ptr->length - host->sg_off; | |
379 | if (count > data->blksz) | |
380 | count = data->blksz; | |
381 | ||
382 | pr_debug("count: %08x offset: %08x flags %08x\n", | |
383 | count, host->sg_off, data->flags); | |
384 | ||
385 | /* Transfer the data */ | |
386 | if (data->flags & MMC_DATA_READ) | |
387 | sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); | |
388 | else | |
389 | sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); | |
390 | ||
391 | host->sg_off += count; | |
392 | ||
393 | tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); | |
394 | ||
395 | if (host->sg_off == host->sg_ptr->length) | |
396 | tmio_mmc_next_sg(host); | |
397 | ||
398 | return; | |
399 | } | |
400 | ||
401 | static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) | |
402 | { | |
403 | if (host->sg_ptr == &host->bounce_sg) { | |
404 | unsigned long flags; | |
405 | void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); | |
406 | memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); | |
407 | tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); | |
408 | } | |
409 | } | |
410 | ||
411 | /* needs to be called with host->lock held */ | |
412 | void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) | |
413 | { | |
414 | struct mmc_data *data = host->data; | |
415 | struct mmc_command *stop; | |
416 | ||
417 | host->data = NULL; | |
418 | ||
419 | if (!data) { | |
420 | dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); | |
421 | return; | |
422 | } | |
423 | stop = data->stop; | |
424 | ||
425 | /* FIXME - return correct transfer count on errors */ | |
426 | if (!data->error) | |
427 | data->bytes_xfered = data->blocks * data->blksz; | |
428 | else | |
429 | data->bytes_xfered = 0; | |
430 | ||
431 | pr_debug("Completed data request\n"); | |
432 | ||
433 | /* | |
434 | * FIXME: other drivers allow an optional stop command of any given type | |
435 | * which we dont do, as the chip can auto generate them. | |
436 | * Perhaps we can be smarter about when to use auto CMD12 and | |
437 | * only issue the auto request when we know this is the desired | |
438 | * stop command, allowing fallback to the stop command the | |
439 | * upper layers expect. For now, we do what works. | |
440 | */ | |
441 | ||
442 | if (data->flags & MMC_DATA_READ) { | |
443 | if (host->chan_rx && !host->force_pio) | |
444 | tmio_mmc_check_bounce_buffer(host); | |
445 | dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", | |
446 | host->mrq); | |
447 | } else { | |
448 | dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", | |
449 | host->mrq); | |
450 | } | |
451 | ||
452 | if (stop) { | |
0f506a96 | 453 | if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg) |
b6147490 GL |
454 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000); |
455 | else | |
456 | BUG(); | |
457 | } | |
458 | ||
b9269fdd | 459 | schedule_work(&host->done); |
b6147490 GL |
460 | } |
461 | ||
462 | static void tmio_mmc_data_irq(struct tmio_mmc_host *host) | |
463 | { | |
464 | struct mmc_data *data; | |
465 | spin_lock(&host->lock); | |
466 | data = host->data; | |
467 | ||
468 | if (!data) | |
469 | goto out; | |
470 | ||
471 | if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { | |
472 | /* | |
473 | * Has all data been written out yet? Testing on SuperH showed, | |
474 | * that in most cases the first interrupt comes already with the | |
475 | * BUSY status bit clear, but on some operations, like mount or | |
476 | * in the beginning of a write / sync / umount, there is one | |
477 | * DATAEND interrupt with the BUSY bit set, in this cases | |
478 | * waiting for one more interrupt fixes the problem. | |
479 | */ | |
480 | if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) { | |
481 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); | |
482 | tasklet_schedule(&host->dma_complete); | |
483 | } | |
484 | } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { | |
485 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); | |
486 | tasklet_schedule(&host->dma_complete); | |
487 | } else { | |
488 | tmio_mmc_do_data_irq(host); | |
489 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); | |
490 | } | |
491 | out: | |
492 | spin_unlock(&host->lock); | |
493 | } | |
494 | ||
495 | static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, | |
496 | unsigned int stat) | |
497 | { | |
498 | struct mmc_command *cmd = host->cmd; | |
499 | int i, addr; | |
500 | ||
501 | spin_lock(&host->lock); | |
502 | ||
503 | if (!host->cmd) { | |
504 | pr_debug("Spurious CMD irq\n"); | |
505 | goto out; | |
506 | } | |
507 | ||
508 | host->cmd = NULL; | |
509 | ||
510 | /* This controller is sicker than the PXA one. Not only do we need to | |
511 | * drop the top 8 bits of the first response word, we also need to | |
512 | * modify the order of the response for short response command types. | |
513 | */ | |
514 | ||
515 | for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) | |
516 | cmd->resp[i] = sd_ctrl_read32(host, addr); | |
517 | ||
518 | if (cmd->flags & MMC_RSP_136) { | |
519 | cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); | |
520 | cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); | |
521 | cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); | |
522 | cmd->resp[3] <<= 8; | |
523 | } else if (cmd->flags & MMC_RSP_R3) { | |
524 | cmd->resp[0] = cmd->resp[3]; | |
525 | } | |
526 | ||
527 | if (stat & TMIO_STAT_CMDTIMEOUT) | |
528 | cmd->error = -ETIMEDOUT; | |
529 | else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) | |
530 | cmd->error = -EILSEQ; | |
531 | ||
532 | /* If there is data to handle we enable data IRQs here, and | |
533 | * we will ultimatley finish the request in the data_end handler. | |
534 | * If theres no data or we encountered an error, finish now. | |
535 | */ | |
536 | if (host->data && !cmd->error) { | |
537 | if (host->data->flags & MMC_DATA_READ) { | |
538 | if (host->force_pio || !host->chan_rx) | |
539 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); | |
540 | else | |
541 | tasklet_schedule(&host->dma_issue); | |
542 | } else { | |
543 | if (host->force_pio || !host->chan_tx) | |
544 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); | |
545 | else | |
546 | tasklet_schedule(&host->dma_issue); | |
547 | } | |
548 | } else { | |
b9269fdd | 549 | schedule_work(&host->done); |
b6147490 GL |
550 | } |
551 | ||
552 | out: | |
553 | spin_unlock(&host->lock); | |
554 | } | |
555 | ||
7729c7a2 SH |
556 | static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host, |
557 | int *ireg, int *status) | |
b6147490 | 558 | { |
7729c7a2 SH |
559 | *status = sd_ctrl_read32(host, CTL_STATUS); |
560 | *ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; | |
b6147490 | 561 | |
7729c7a2 SH |
562 | pr_debug_status(*status); |
563 | pr_debug_status(*ireg); | |
564 | } | |
b6147490 | 565 | |
7729c7a2 SH |
566 | static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, |
567 | int ireg, int status) | |
568 | { | |
569 | struct mmc_host *mmc = host->mmc; | |
b6147490 | 570 | |
e312eb1e PP |
571 | /* Card insert / remove attempts */ |
572 | if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { | |
573 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | | |
574 | TMIO_STAT_CARD_REMOVE); | |
71d111cd GL |
575 | if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || |
576 | ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && | |
577 | !work_pending(&mmc->detect.work)) | |
b9269fdd | 578 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); |
7729c7a2 | 579 | return true; |
b6147490 GL |
580 | } |
581 | ||
7729c7a2 SH |
582 | return false; |
583 | } | |
584 | ||
585 | irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid) | |
586 | { | |
587 | unsigned int ireg, status; | |
588 | struct tmio_mmc_host *host = devid; | |
b6147490 | 589 | |
7729c7a2 SH |
590 | tmio_mmc_card_irq_status(host, &ireg, &status); |
591 | __tmio_mmc_card_detect_irq(host, ireg, status); | |
592 | ||
593 | return IRQ_HANDLED; | |
594 | } | |
595 | EXPORT_SYMBOL(tmio_mmc_card_detect_irq); | |
596 | ||
597 | static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, | |
598 | int ireg, int status) | |
599 | { | |
e312eb1e PP |
600 | /* Command completion */ |
601 | if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { | |
602 | tmio_mmc_ack_mmc_irqs(host, | |
603 | TMIO_STAT_CMDRESPEND | | |
604 | TMIO_STAT_CMDTIMEOUT); | |
605 | tmio_mmc_cmd_irq(host, status); | |
7729c7a2 | 606 | return true; |
e312eb1e | 607 | } |
b6147490 | 608 | |
e312eb1e PP |
609 | /* Data transfer */ |
610 | if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { | |
611 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); | |
612 | tmio_mmc_pio_irq(host); | |
7729c7a2 | 613 | return true; |
e312eb1e | 614 | } |
b6147490 | 615 | |
e312eb1e PP |
616 | /* Data transfer completion */ |
617 | if (ireg & TMIO_STAT_DATAEND) { | |
618 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); | |
619 | tmio_mmc_data_irq(host); | |
7729c7a2 | 620 | return true; |
b6147490 | 621 | } |
e312eb1e | 622 | |
7729c7a2 SH |
623 | return false; |
624 | } | |
625 | ||
626 | irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid) | |
627 | { | |
628 | unsigned int ireg, status; | |
629 | struct tmio_mmc_host *host = devid; | |
630 | ||
631 | tmio_mmc_card_irq_status(host, &ireg, &status); | |
632 | __tmio_mmc_sdcard_irq(host, ireg, status); | |
633 | ||
634 | return IRQ_HANDLED; | |
635 | } | |
636 | EXPORT_SYMBOL(tmio_mmc_sdcard_irq); | |
637 | ||
638 | irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid) | |
639 | { | |
640 | struct tmio_mmc_host *host = devid; | |
641 | struct mmc_host *mmc = host->mmc; | |
642 | struct tmio_mmc_data *pdata = host->pdata; | |
643 | unsigned int ireg, status; | |
644 | ||
645 | if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) | |
646 | return IRQ_HANDLED; | |
647 | ||
648 | status = sd_ctrl_read16(host, CTL_SDIO_STATUS); | |
649 | ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask; | |
650 | ||
651 | sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL); | |
652 | ||
653 | if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) | |
654 | mmc_signal_sdio_irq(mmc); | |
655 | ||
656 | return IRQ_HANDLED; | |
657 | } | |
658 | EXPORT_SYMBOL(tmio_mmc_sdio_irq); | |
659 | ||
660 | irqreturn_t tmio_mmc_irq(int irq, void *devid) | |
661 | { | |
662 | struct tmio_mmc_host *host = devid; | |
663 | unsigned int ireg, status; | |
664 | ||
665 | pr_debug("MMC IRQ begin\n"); | |
666 | ||
667 | tmio_mmc_card_irq_status(host, &ireg, &status); | |
668 | if (__tmio_mmc_card_detect_irq(host, ireg, status)) | |
669 | return IRQ_HANDLED; | |
670 | if (__tmio_mmc_sdcard_irq(host, ireg, status)) | |
671 | return IRQ_HANDLED; | |
672 | ||
673 | tmio_mmc_sdio_irq(irq, devid); | |
b6147490 | 674 | |
b6147490 GL |
675 | return IRQ_HANDLED; |
676 | } | |
8e7bfdb3 | 677 | EXPORT_SYMBOL(tmio_mmc_irq); |
b6147490 GL |
678 | |
679 | static int tmio_mmc_start_data(struct tmio_mmc_host *host, | |
680 | struct mmc_data *data) | |
681 | { | |
682 | struct tmio_mmc_data *pdata = host->pdata; | |
683 | ||
684 | pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", | |
685 | data->blksz, data->blocks); | |
686 | ||
687 | /* Some hardware cannot perform 2 byte requests in 4 bit mode */ | |
688 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) { | |
689 | int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; | |
690 | ||
691 | if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { | |
692 | pr_err("%s: %d byte block unsupported in 4 bit mode\n", | |
693 | mmc_hostname(host->mmc), data->blksz); | |
694 | return -EINVAL; | |
695 | } | |
696 | } | |
697 | ||
698 | tmio_mmc_init_sg(host, data); | |
699 | host->data = data; | |
700 | ||
701 | /* Set transfer length / blocksize */ | |
702 | sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); | |
703 | sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); | |
704 | ||
705 | tmio_mmc_start_dma(host, data); | |
706 | ||
707 | return 0; | |
708 | } | |
709 | ||
710 | /* Process requests from the MMC layer */ | |
711 | static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
712 | { | |
713 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
df3ef2d3 | 714 | unsigned long flags; |
b6147490 GL |
715 | int ret; |
716 | ||
df3ef2d3 GL |
717 | spin_lock_irqsave(&host->lock, flags); |
718 | ||
719 | if (host->mrq) { | |
b6147490 | 720 | pr_debug("request not null\n"); |
df3ef2d3 GL |
721 | if (IS_ERR(host->mrq)) { |
722 | spin_unlock_irqrestore(&host->lock, flags); | |
723 | mrq->cmd->error = -EAGAIN; | |
724 | mmc_request_done(mmc, mrq); | |
725 | return; | |
726 | } | |
727 | } | |
b6147490 GL |
728 | |
729 | host->last_req_ts = jiffies; | |
730 | wmb(); | |
731 | host->mrq = mrq; | |
732 | ||
df3ef2d3 GL |
733 | spin_unlock_irqrestore(&host->lock, flags); |
734 | ||
b6147490 GL |
735 | if (mrq->data) { |
736 | ret = tmio_mmc_start_data(host, mrq->data); | |
737 | if (ret) | |
738 | goto fail; | |
739 | } | |
740 | ||
741 | ret = tmio_mmc_start_command(host, mrq->cmd); | |
742 | if (!ret) { | |
743 | schedule_delayed_work(&host->delayed_reset_work, | |
744 | msecs_to_jiffies(2000)); | |
745 | return; | |
746 | } | |
747 | ||
748 | fail: | |
b6147490 | 749 | host->force_pio = false; |
df3ef2d3 | 750 | host->mrq = NULL; |
b6147490 GL |
751 | mrq->cmd->error = ret; |
752 | mmc_request_done(mmc, mrq); | |
753 | } | |
754 | ||
8c102a96 GL |
755 | static int tmio_mmc_clk_update(struct mmc_host *mmc) |
756 | { | |
757 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
758 | struct tmio_mmc_data *pdata = host->pdata; | |
759 | int ret; | |
760 | ||
761 | if (!pdata->clk_enable) | |
762 | return -ENOTSUPP; | |
763 | ||
764 | ret = pdata->clk_enable(host->pdev, &mmc->f_max); | |
765 | if (!ret) | |
766 | mmc->f_min = mmc->f_max / 512; | |
767 | ||
768 | return ret; | |
769 | } | |
770 | ||
b958a67c GL |
771 | static void tmio_mmc_set_power(struct tmio_mmc_host *host, struct mmc_ios *ios) |
772 | { | |
773 | struct mmc_host *mmc = host->mmc; | |
774 | ||
775 | if (host->set_pwr) | |
776 | host->set_pwr(host->pdev, ios->power_mode != MMC_POWER_OFF); | |
777 | if (!IS_ERR(mmc->supply.vmmc)) | |
778 | /* Errors ignored... */ | |
779 | mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, | |
780 | ios->power_mode ? ios->vdd : 0); | |
781 | } | |
782 | ||
b6147490 GL |
783 | /* Set MMC clock / power. |
784 | * Note: This controller uses a simple divider scheme therefore it cannot | |
785 | * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as | |
786 | * MMC wont run that fast, it has to be clocked at 12MHz which is the next | |
787 | * slowest setting. | |
788 | */ | |
789 | static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
790 | { | |
791 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
4932bd64 | 792 | struct device *dev = &host->pdev->dev; |
df3ef2d3 GL |
793 | unsigned long flags; |
794 | ||
b9269fdd GL |
795 | mutex_lock(&host->ios_lock); |
796 | ||
df3ef2d3 GL |
797 | spin_lock_irqsave(&host->lock, flags); |
798 | if (host->mrq) { | |
799 | if (IS_ERR(host->mrq)) { | |
4932bd64 | 800 | dev_dbg(dev, |
df3ef2d3 GL |
801 | "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", |
802 | current->comm, task_pid_nr(current), | |
803 | ios->clock, ios->power_mode); | |
804 | host->mrq = ERR_PTR(-EINTR); | |
805 | } else { | |
4932bd64 | 806 | dev_dbg(dev, |
df3ef2d3 GL |
807 | "%s.%d: CMD%u active since %lu, now %lu!\n", |
808 | current->comm, task_pid_nr(current), | |
809 | host->mrq->cmd->opcode, host->last_req_ts, jiffies); | |
810 | } | |
811 | spin_unlock_irqrestore(&host->lock, flags); | |
b9269fdd GL |
812 | |
813 | mutex_unlock(&host->ios_lock); | |
df3ef2d3 GL |
814 | return; |
815 | } | |
816 | ||
817 | host->mrq = ERR_PTR(-EBUSY); | |
818 | ||
819 | spin_unlock_irqrestore(&host->lock, flags); | |
b6147490 | 820 | |
71d111cd | 821 | /* |
c391e1b9 | 822 | * host->power toggles between false and true in both cases - either |
c8be24c2 GL |
823 | * or not the controller can be runtime-suspended during inactivity. |
824 | * But if the controller has to be kept on, the runtime-pm usage_count | |
825 | * is kept positive, so no suspending actually takes place. | |
71d111cd GL |
826 | */ |
827 | if (ios->power_mode == MMC_POWER_ON && ios->clock) { | |
c391e1b9 | 828 | if (!host->power) { |
8c102a96 | 829 | tmio_mmc_clk_update(mmc); |
4932bd64 | 830 | pm_runtime_get_sync(dev); |
c391e1b9 | 831 | host->power = true; |
7311bef0 | 832 | } |
71d111cd | 833 | tmio_mmc_set_clock(host, ios->clock); |
c919c2a0 | 834 | /* power up SD bus */ |
b958a67c | 835 | tmio_mmc_set_power(host, ios); |
5fd01579 GL |
836 | /* start bus clock */ |
837 | tmio_mmc_clk_start(host); | |
71d111cd | 838 | } else if (ios->power_mode != MMC_POWER_UP) { |
b958a67c GL |
839 | if (ios->power_mode == MMC_POWER_OFF) |
840 | tmio_mmc_set_power(host, ios); | |
c391e1b9 | 841 | if (host->power) { |
8c102a96 | 842 | struct tmio_mmc_data *pdata = host->pdata; |
6de707f2 | 843 | tmio_mmc_clk_stop(host); |
c391e1b9 | 844 | host->power = false; |
4932bd64 | 845 | pm_runtime_put(dev); |
8c102a96 GL |
846 | if (pdata->clk_disable) |
847 | pdata->clk_disable(host->pdev); | |
71d111cd | 848 | } |
b6147490 GL |
849 | } |
850 | ||
6de707f2 LP |
851 | if (host->power) { |
852 | switch (ios->bus_width) { | |
853 | case MMC_BUS_WIDTH_1: | |
854 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0); | |
855 | break; | |
856 | case MMC_BUS_WIDTH_4: | |
857 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0); | |
858 | break; | |
859 | } | |
b6147490 GL |
860 | } |
861 | ||
862 | /* Let things settle. delay taken from winCE driver */ | |
863 | udelay(140); | |
df3ef2d3 GL |
864 | if (PTR_ERR(host->mrq) == -EINTR) |
865 | dev_dbg(&host->pdev->dev, | |
866 | "%s.%d: IOS interrupted: clk %u, mode %u", | |
867 | current->comm, task_pid_nr(current), | |
868 | ios->clock, ios->power_mode); | |
869 | host->mrq = NULL; | |
b9269fdd GL |
870 | |
871 | mutex_unlock(&host->ios_lock); | |
b6147490 GL |
872 | } |
873 | ||
874 | static int tmio_mmc_get_ro(struct mmc_host *mmc) | |
875 | { | |
876 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
877 | struct tmio_mmc_data *pdata = host->pdata; | |
3071cafb GL |
878 | int ret = mmc_gpio_get_ro(mmc); |
879 | if (ret >= 0) | |
880 | return ret; | |
b6147490 | 881 | |
7d8b4c2a GL |
882 | return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || |
883 | (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); | |
b6147490 GL |
884 | } |
885 | ||
886 | static int tmio_mmc_get_cd(struct mmc_host *mmc) | |
887 | { | |
888 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
889 | struct tmio_mmc_data *pdata = host->pdata; | |
3071cafb GL |
890 | int ret = mmc_gpio_get_cd(mmc); |
891 | if (ret >= 0) | |
892 | return ret; | |
b6147490 GL |
893 | |
894 | if (!pdata->get_cd) | |
895 | return -ENOSYS; | |
896 | else | |
897 | return pdata->get_cd(host->pdev); | |
898 | } | |
899 | ||
900 | static const struct mmc_host_ops tmio_mmc_ops = { | |
901 | .request = tmio_mmc_request, | |
902 | .set_ios = tmio_mmc_set_ios, | |
903 | .get_ro = tmio_mmc_get_ro, | |
904 | .get_cd = tmio_mmc_get_cd, | |
905 | .enable_sdio_irq = tmio_mmc_enable_sdio_irq, | |
906 | }; | |
907 | ||
b958a67c GL |
908 | static void tmio_mmc_init_ocr(struct tmio_mmc_host *host) |
909 | { | |
910 | struct tmio_mmc_data *pdata = host->pdata; | |
911 | struct mmc_host *mmc = host->mmc; | |
912 | ||
913 | mmc_regulator_get_supply(mmc); | |
914 | ||
915 | if (!mmc->ocr_avail) | |
916 | mmc->ocr_avail = pdata->ocr_mask ? : MMC_VDD_32_33 | MMC_VDD_33_34; | |
917 | else if (pdata->ocr_mask) | |
918 | dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n"); | |
919 | } | |
920 | ||
b6147490 GL |
921 | int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host, |
922 | struct platform_device *pdev, | |
923 | struct tmio_mmc_data *pdata) | |
924 | { | |
925 | struct tmio_mmc_host *_host; | |
926 | struct mmc_host *mmc; | |
927 | struct resource *res_ctl; | |
928 | int ret; | |
929 | u32 irq_mask = TMIO_MASK_CMD; | |
930 | ||
931 | res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
932 | if (!res_ctl) | |
933 | return -EINVAL; | |
934 | ||
935 | mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); | |
936 | if (!mmc) | |
937 | return -ENOMEM; | |
938 | ||
7311bef0 | 939 | pdata->dev = &pdev->dev; |
b6147490 GL |
940 | _host = mmc_priv(mmc); |
941 | _host->pdata = pdata; | |
942 | _host->mmc = mmc; | |
943 | _host->pdev = pdev; | |
944 | platform_set_drvdata(pdev, mmc); | |
945 | ||
946 | _host->set_pwr = pdata->set_pwr; | |
947 | _host->set_clk_div = pdata->set_clk_div; | |
948 | ||
949 | /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ | |
950 | _host->bus_shift = resource_size(res_ctl) >> 10; | |
951 | ||
952 | _host->ctl = ioremap(res_ctl->start, resource_size(res_ctl)); | |
953 | if (!_host->ctl) { | |
954 | ret = -ENOMEM; | |
955 | goto host_free; | |
956 | } | |
957 | ||
958 | mmc->ops = &tmio_mmc_ops; | |
959 | mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities; | |
02cb3221 | 960 | mmc->caps2 = pdata->capabilities2; |
b6147490 GL |
961 | mmc->max_segs = 32; |
962 | mmc->max_blk_size = 512; | |
963 | mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) * | |
964 | mmc->max_segs; | |
965 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; | |
966 | mmc->max_seg_size = mmc->max_req_size; | |
b958a67c | 967 | tmio_mmc_init_ocr(_host); |
b6147490 | 968 | |
c8be24c2 | 969 | _host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD || |
2b1ac5c2 GL |
970 | mmc->caps & MMC_CAP_NEEDS_POLL || |
971 | mmc->caps & MMC_CAP_NONREMOVABLE); | |
972 | ||
c391e1b9 | 973 | _host->power = false; |
e6ee7182 GL |
974 | pm_runtime_enable(&pdev->dev); |
975 | ret = pm_runtime_resume(&pdev->dev); | |
976 | if (ret < 0) | |
977 | goto pm_disable; | |
978 | ||
8c102a96 GL |
979 | if (tmio_mmc_clk_update(mmc) < 0) { |
980 | mmc->f_max = pdata->hclk; | |
981 | mmc->f_min = mmc->f_max / 512; | |
982 | } | |
983 | ||
cbb18b30 BH |
984 | /* |
985 | * There are 4 different scenarios for the card detection: | |
986 | * 1) an external gpio irq handles the cd (best for power savings) | |
987 | * 2) internal sdhi irq handles the cd | |
988 | * 3) a worker thread polls the sdhi - indicated by MMC_CAP_NEEDS_POLL | |
989 | * 4) the medium is non-removable - indicated by MMC_CAP_NONREMOVABLE | |
990 | * | |
c8be24c2 GL |
991 | * While we increment the runtime PM counter for all scenarios when |
992 | * the mmc core activates us by calling an appropriate set_ios(), we | |
993 | * must additionally ensure that in case 2) the tmio mmc hardware stays | |
cbb18b30 BH |
994 | * powered on during runtime for the card detection to work. |
995 | */ | |
2b1ac5c2 | 996 | if (_host->native_hotplug) |
cbb18b30 BH |
997 | pm_runtime_get_noresume(&pdev->dev); |
998 | ||
b6147490 GL |
999 | tmio_mmc_clk_stop(_host); |
1000 | tmio_mmc_reset(_host); | |
1001 | ||
54680fe7 | 1002 | _host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK); |
b6147490 | 1003 | tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); |
e0337cc8 GL |
1004 | |
1005 | /* Unmask the IRQs we want to know about */ | |
1006 | if (!_host->chan_rx) | |
1007 | irq_mask |= TMIO_MASK_READOP; | |
1008 | if (!_host->chan_tx) | |
1009 | irq_mask |= TMIO_MASK_WRITEOP; | |
1010 | if (!_host->native_hotplug) | |
1011 | irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT); | |
1012 | ||
1013 | _host->sdcard_irq_mask &= ~irq_mask; | |
1014 | ||
b6147490 GL |
1015 | if (pdata->flags & TMIO_MMC_SDIO_IRQ) |
1016 | tmio_mmc_enable_sdio_irq(mmc, 0); | |
1017 | ||
b6147490 | 1018 | spin_lock_init(&_host->lock); |
b9269fdd | 1019 | mutex_init(&_host->ios_lock); |
b6147490 GL |
1020 | |
1021 | /* Init delayed work for request timeouts */ | |
1022 | INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); | |
b9269fdd | 1023 | INIT_WORK(&_host->done, tmio_mmc_done_work); |
b6147490 GL |
1024 | |
1025 | /* See if we also get DMA */ | |
1026 | tmio_mmc_request_dma(_host, pdata); | |
1027 | ||
8c102a96 GL |
1028 | ret = mmc_add_host(mmc); |
1029 | if (pdata->clk_disable) | |
1030 | pdata->clk_disable(pdev); | |
1031 | if (ret < 0) { | |
1032 | tmio_mmc_host_remove(_host); | |
1033 | return ret; | |
1034 | } | |
b6147490 | 1035 | |
c419e611 RW |
1036 | dev_pm_qos_expose_latency_limit(&pdev->dev, 100); |
1037 | ||
c8be24c2 | 1038 | if (pdata->flags & TMIO_MMC_USE_GPIO_CD) { |
fd0ea65d | 1039 | ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio); |
c8be24c2 GL |
1040 | if (ret < 0) { |
1041 | tmio_mmc_host_remove(_host); | |
1042 | return ret; | |
1043 | } | |
1044 | } | |
1045 | ||
b6147490 GL |
1046 | *host = _host; |
1047 | ||
1048 | return 0; | |
1049 | ||
e6ee7182 GL |
1050 | pm_disable: |
1051 | pm_runtime_disable(&pdev->dev); | |
b6147490 GL |
1052 | iounmap(_host->ctl); |
1053 | host_free: | |
1054 | mmc_free_host(mmc); | |
1055 | ||
1056 | return ret; | |
1057 | } | |
1058 | EXPORT_SYMBOL(tmio_mmc_host_probe); | |
1059 | ||
1060 | void tmio_mmc_host_remove(struct tmio_mmc_host *host) | |
1061 | { | |
e6ee7182 | 1062 | struct platform_device *pdev = host->pdev; |
c8be24c2 GL |
1063 | struct tmio_mmc_data *pdata = host->pdata; |
1064 | struct mmc_host *mmc = host->mmc; | |
1065 | ||
1066 | if (pdata->flags & TMIO_MMC_USE_GPIO_CD) | |
1067 | /* | |
1068 | * This means we can miss a card-eject, but this is anyway | |
1069 | * possible, because of delayed processing of hotplug events. | |
1070 | */ | |
fd0ea65d | 1071 | mmc_gpio_free_cd(mmc); |
e6ee7182 | 1072 | |
2b1ac5c2 | 1073 | if (!host->native_hotplug) |
7311bef0 GL |
1074 | pm_runtime_get_sync(&pdev->dev); |
1075 | ||
c419e611 RW |
1076 | dev_pm_qos_hide_latency_limit(&pdev->dev); |
1077 | ||
c8be24c2 | 1078 | mmc_remove_host(mmc); |
b9269fdd | 1079 | cancel_work_sync(&host->done); |
b6147490 GL |
1080 | cancel_delayed_work_sync(&host->delayed_reset_work); |
1081 | tmio_mmc_release_dma(host); | |
e6ee7182 | 1082 | |
e6ee7182 GL |
1083 | pm_runtime_put_sync(&pdev->dev); |
1084 | pm_runtime_disable(&pdev->dev); | |
7311bef0 GL |
1085 | |
1086 | iounmap(host->ctl); | |
c8be24c2 | 1087 | mmc_free_host(mmc); |
b6147490 GL |
1088 | } |
1089 | EXPORT_SYMBOL(tmio_mmc_host_remove); | |
1090 | ||
e6ee7182 GL |
1091 | #ifdef CONFIG_PM |
1092 | int tmio_mmc_host_suspend(struct device *dev) | |
1093 | { | |
1094 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1095 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
1096 | int ret = mmc_suspend_host(mmc); | |
1097 | ||
1098 | if (!ret) | |
1099 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); | |
1100 | ||
e6ee7182 GL |
1101 | return ret; |
1102 | } | |
1103 | EXPORT_SYMBOL(tmio_mmc_host_suspend); | |
1104 | ||
1105 | int tmio_mmc_host_resume(struct device *dev) | |
1106 | { | |
1107 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1108 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
1109 | ||
c8be24c2 GL |
1110 | tmio_mmc_reset(host); |
1111 | tmio_mmc_enable_dma(host, true); | |
e6ee7182 | 1112 | |
c8be24c2 | 1113 | /* The MMC core will perform the complete set up */ |
e6ee7182 GL |
1114 | return mmc_resume_host(mmc); |
1115 | } | |
1116 | EXPORT_SYMBOL(tmio_mmc_host_resume); | |
1117 | ||
1118 | #endif /* CONFIG_PM */ | |
1119 | ||
7311bef0 GL |
1120 | int tmio_mmc_host_runtime_suspend(struct device *dev) |
1121 | { | |
1122 | return 0; | |
1123 | } | |
1124 | EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend); | |
1125 | ||
1126 | int tmio_mmc_host_runtime_resume(struct device *dev) | |
1127 | { | |
1128 | struct mmc_host *mmc = dev_get_drvdata(dev); | |
1129 | struct tmio_mmc_host *host = mmc_priv(mmc); | |
7311bef0 GL |
1130 | |
1131 | tmio_mmc_reset(host); | |
162f43e3 | 1132 | tmio_mmc_enable_dma(host, true); |
7311bef0 | 1133 | |
7311bef0 GL |
1134 | return 0; |
1135 | } | |
1136 | EXPORT_SYMBOL(tmio_mmc_host_runtime_resume); | |
1137 | ||
b6147490 | 1138 | MODULE_LICENSE("GPL v2"); |