2 * Driver for the MMC / SD / SDIO IP found in:
4 * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
6 * Copyright (C) 2015-17 Renesas Electronics Corporation
7 * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang
8 * Copyright (C) 2017 Horms Solutions, Simon Horman
9 * Copyright (C) 2011 Guennadi Liakhovetski
10 * Copyright (C) 2007 Ian Molton
11 * Copyright (C) 2004 Ian Molton
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
17 * This driver draws mainly on scattered spec sheets, Reverse engineering
18 * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit
19 * support). (Further 4 bit support from a later datasheet).
22 * Investigate using a workqueue for PIO transfers
24 * Better Power management
25 * Handle MMC errors better
26 * double buffer support
30 #include <linux/delay.h>
31 #include <linux/device.h>
32 #include <linux/highmem.h>
33 #include <linux/interrupt.h>
35 #include <linux/irq.h>
36 #include <linux/mfd/tmio.h>
37 #include <linux/mmc/card.h>
38 #include <linux/mmc/host.h>
39 #include <linux/mmc/mmc.h>
40 #include <linux/mmc/slot-gpio.h>
41 #include <linux/module.h>
42 #include <linux/pagemap.h>
43 #include <linux/platform_device.h>
44 #include <linux/pm_qos.h>
45 #include <linux/pm_runtime.h>
46 #include <linux/regulator/consumer.h>
47 #include <linux/mmc/sdio.h>
48 #include <linux/scatterlist.h>
49 #include <linux/spinlock.h>
50 #include <linux/workqueue.h>
54 static inline void tmio_mmc_start_dma(struct tmio_mmc_host
*host
,
55 struct mmc_data
*data
)
58 host
->dma_ops
->start(host
, data
);
61 static inline void tmio_mmc_enable_dma(struct tmio_mmc_host
*host
, bool enable
)
64 host
->dma_ops
->enable(host
, enable
);
67 static inline void tmio_mmc_request_dma(struct tmio_mmc_host
*host
,
68 struct tmio_mmc_data
*pdata
)
71 host
->dma_ops
->request(host
, pdata
);
78 static inline void tmio_mmc_release_dma(struct tmio_mmc_host
*host
)
81 host
->dma_ops
->release(host
);
84 static inline void tmio_mmc_abort_dma(struct tmio_mmc_host
*host
)
87 host
->dma_ops
->abort(host
);
90 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host
*host
, u32 i
)
92 host
->sdcard_irq_mask
&= ~(i
& TMIO_MASK_IRQ
);
93 sd_ctrl_write32_as_16_and_16(host
, CTL_IRQ_MASK
, host
->sdcard_irq_mask
);
95 EXPORT_SYMBOL_GPL(tmio_mmc_enable_mmc_irqs
);
97 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host
*host
, u32 i
)
99 host
->sdcard_irq_mask
|= (i
& TMIO_MASK_IRQ
);
100 sd_ctrl_write32_as_16_and_16(host
, CTL_IRQ_MASK
, host
->sdcard_irq_mask
);
102 EXPORT_SYMBOL_GPL(tmio_mmc_disable_mmc_irqs
);
104 static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host
*host
, u32 i
)
106 sd_ctrl_write32_as_16_and_16(host
, CTL_STATUS
, ~i
);
109 static void tmio_mmc_init_sg(struct tmio_mmc_host
*host
, struct mmc_data
*data
)
111 host
->sg_len
= data
->sg_len
;
112 host
->sg_ptr
= data
->sg
;
113 host
->sg_orig
= data
->sg
;
117 static int tmio_mmc_next_sg(struct tmio_mmc_host
*host
)
119 host
->sg_ptr
= sg_next(host
->sg_ptr
);
121 return --host
->sg_len
;
124 #define CMDREQ_TIMEOUT 5000
126 #ifdef CONFIG_MMC_DEBUG
128 #define STATUS_TO_TEXT(a, status, i) \
130 if ((status) & TMIO_STAT_##a) { \
132 printk(KERN_DEBUG " | "); \
133 printk(KERN_DEBUG #a); \
137 static void pr_debug_status(u32 status
)
141 pr_debug("status: %08x = ", status
);
142 STATUS_TO_TEXT(CARD_REMOVE
, status
, i
);
143 STATUS_TO_TEXT(CARD_INSERT
, status
, i
);
144 STATUS_TO_TEXT(SIGSTATE
, status
, i
);
145 STATUS_TO_TEXT(WRPROTECT
, status
, i
);
146 STATUS_TO_TEXT(CARD_REMOVE_A
, status
, i
);
147 STATUS_TO_TEXT(CARD_INSERT_A
, status
, i
);
148 STATUS_TO_TEXT(SIGSTATE_A
, status
, i
);
149 STATUS_TO_TEXT(CMD_IDX_ERR
, status
, i
);
150 STATUS_TO_TEXT(STOPBIT_ERR
, status
, i
);
151 STATUS_TO_TEXT(ILL_FUNC
, status
, i
);
152 STATUS_TO_TEXT(CMD_BUSY
, status
, i
);
153 STATUS_TO_TEXT(CMDRESPEND
, status
, i
);
154 STATUS_TO_TEXT(DATAEND
, status
, i
);
155 STATUS_TO_TEXT(CRCFAIL
, status
, i
);
156 STATUS_TO_TEXT(DATATIMEOUT
, status
, i
);
157 STATUS_TO_TEXT(CMDTIMEOUT
, status
, i
);
158 STATUS_TO_TEXT(RXOVERFLOW
, status
, i
);
159 STATUS_TO_TEXT(TXUNDERRUN
, status
, i
);
160 STATUS_TO_TEXT(RXRDY
, status
, i
);
161 STATUS_TO_TEXT(TXRQ
, status
, i
);
162 STATUS_TO_TEXT(ILL_ACCESS
, status
, i
);
167 #define pr_debug_status(s) do { } while (0)
170 static void tmio_mmc_enable_sdio_irq(struct mmc_host
*mmc
, int enable
)
172 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
174 if (enable
&& !host
->sdio_irq_enabled
) {
177 /* Keep device active while SDIO irq is enabled */
178 pm_runtime_get_sync(mmc_dev(mmc
));
180 host
->sdio_irq_enabled
= true;
181 host
->sdio_irq_mask
= TMIO_SDIO_MASK_ALL
& ~TMIO_SDIO_STAT_IOIRQ
;
183 /* Clear obsolete interrupts before enabling */
184 sdio_status
= sd_ctrl_read16(host
, CTL_SDIO_STATUS
) & ~TMIO_SDIO_MASK_ALL
;
185 if (host
->pdata
->flags
& TMIO_MMC_SDIO_STATUS_SETBITS
)
186 sdio_status
|= TMIO_SDIO_SETBITS_MASK
;
187 sd_ctrl_write16(host
, CTL_SDIO_STATUS
, sdio_status
);
189 sd_ctrl_write16(host
, CTL_SDIO_IRQ_MASK
, host
->sdio_irq_mask
);
190 } else if (!enable
&& host
->sdio_irq_enabled
) {
191 host
->sdio_irq_mask
= TMIO_SDIO_MASK_ALL
;
192 sd_ctrl_write16(host
, CTL_SDIO_IRQ_MASK
, host
->sdio_irq_mask
);
194 host
->sdio_irq_enabled
= false;
195 pm_runtime_mark_last_busy(mmc_dev(mmc
));
196 pm_runtime_put_autosuspend(mmc_dev(mmc
));
200 static void tmio_mmc_clk_start(struct tmio_mmc_host
*host
)
202 sd_ctrl_write16(host
, CTL_SD_CARD_CLK_CTL
, CLK_CTL_SCLKEN
|
203 sd_ctrl_read16(host
, CTL_SD_CARD_CLK_CTL
));
204 msleep(host
->pdata
->flags
& TMIO_MMC_MIN_RCAR2
? 1 : 10);
206 if (host
->pdata
->flags
& TMIO_MMC_HAVE_HIGH_REG
) {
207 sd_ctrl_write16(host
, CTL_CLK_AND_WAIT_CTL
, 0x0100);
212 static void tmio_mmc_clk_stop(struct tmio_mmc_host
*host
)
214 if (host
->pdata
->flags
& TMIO_MMC_HAVE_HIGH_REG
) {
215 sd_ctrl_write16(host
, CTL_CLK_AND_WAIT_CTL
, 0x0000);
219 sd_ctrl_write16(host
, CTL_SD_CARD_CLK_CTL
, ~CLK_CTL_SCLKEN
&
220 sd_ctrl_read16(host
, CTL_SD_CARD_CLK_CTL
));
221 msleep(host
->pdata
->flags
& TMIO_MMC_MIN_RCAR2
? 5 : 10);
224 static void tmio_mmc_set_clock(struct tmio_mmc_host
*host
,
225 unsigned int new_clock
)
229 if (new_clock
== 0) {
230 tmio_mmc_clk_stop(host
);
234 if (host
->clk_update
)
235 clock
= host
->clk_update(host
, new_clock
) / 512;
237 clock
= host
->mmc
->f_min
;
239 for (clk
= 0x80000080; new_clock
>= (clock
<< 1); clk
>>= 1)
242 /* 1/1 clock is option */
243 if ((host
->pdata
->flags
& TMIO_MMC_CLK_ACTUAL
) && ((clk
>> 22) & 0x1))
246 if (host
->set_clk_div
)
247 host
->set_clk_div(host
->pdev
, (clk
>> 22) & 1);
249 sd_ctrl_write16(host
, CTL_SD_CARD_CLK_CTL
, ~CLK_CTL_SCLKEN
&
250 sd_ctrl_read16(host
, CTL_SD_CARD_CLK_CTL
));
251 sd_ctrl_write16(host
, CTL_SD_CARD_CLK_CTL
, clk
& CLK_CTL_DIV_MASK
);
252 if (!(host
->pdata
->flags
& TMIO_MMC_MIN_RCAR2
))
255 tmio_mmc_clk_start(host
);
258 static void tmio_mmc_reset(struct tmio_mmc_host
*host
)
260 /* FIXME - should we set stop clock reg here */
261 sd_ctrl_write16(host
, CTL_RESET_SD
, 0x0000);
262 if (host
->pdata
->flags
& TMIO_MMC_HAVE_HIGH_REG
)
263 sd_ctrl_write16(host
, CTL_RESET_SDIO
, 0x0000);
265 sd_ctrl_write16(host
, CTL_RESET_SD
, 0x0001);
266 if (host
->pdata
->flags
& TMIO_MMC_HAVE_HIGH_REG
)
267 sd_ctrl_write16(host
, CTL_RESET_SDIO
, 0x0001);
270 if (host
->pdata
->flags
& TMIO_MMC_SDIO_IRQ
) {
271 sd_ctrl_write16(host
, CTL_SDIO_IRQ_MASK
, host
->sdio_irq_mask
);
272 sd_ctrl_write16(host
, CTL_TRANSACTION_CTL
, 0x0001);
277 static void tmio_mmc_reset_work(struct work_struct
*work
)
279 struct tmio_mmc_host
*host
= container_of(work
, struct tmio_mmc_host
,
280 delayed_reset_work
.work
);
281 struct mmc_request
*mrq
;
284 spin_lock_irqsave(&host
->lock
, flags
);
288 * is request already finished? Since we use a non-blocking
289 * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
290 * us, so, have to check for IS_ERR(host->mrq)
292 if (IS_ERR_OR_NULL(mrq
) ||
293 time_is_after_jiffies(host
->last_req_ts
+
294 msecs_to_jiffies(CMDREQ_TIMEOUT
))) {
295 spin_unlock_irqrestore(&host
->lock
, flags
);
299 dev_warn(&host
->pdev
->dev
,
300 "timeout waiting for hardware interrupt (CMD%u)\n",
304 host
->data
->error
= -ETIMEDOUT
;
306 host
->cmd
->error
= -ETIMEDOUT
;
308 mrq
->cmd
->error
= -ETIMEDOUT
;
312 host
->force_pio
= false;
314 spin_unlock_irqrestore(&host
->lock
, flags
);
316 tmio_mmc_reset(host
);
318 /* Ready for new calls */
321 tmio_mmc_abort_dma(host
);
322 mmc_request_done(host
->mmc
, mrq
);
325 /* These are the bitmasks the tmio chip requires to implement the MMC response
326 * types. Note that R1 and R6 are the same in this scheme. */
327 #define APP_CMD 0x0040
328 #define RESP_NONE 0x0300
329 #define RESP_R1 0x0400
330 #define RESP_R1B 0x0500
331 #define RESP_R2 0x0600
332 #define RESP_R3 0x0700
333 #define DATA_PRESENT 0x0800
334 #define TRANSFER_READ 0x1000
335 #define TRANSFER_MULTI 0x2000
336 #define SECURITY_CMD 0x4000
337 #define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */
339 static int tmio_mmc_start_command(struct tmio_mmc_host
*host
,
340 struct mmc_command
*cmd
)
342 struct mmc_data
*data
= host
->data
;
344 u32 irq_mask
= TMIO_MASK_CMD
;
346 /* CMD12 is handled by hardware */
347 if (cmd
->opcode
== MMC_STOP_TRANSMISSION
&& !cmd
->arg
) {
348 sd_ctrl_write16(host
, CTL_STOP_INTERNAL_ACTION
, TMIO_STOP_STP
);
352 switch (mmc_resp_type(cmd
)) {
353 case MMC_RSP_NONE
: c
|= RESP_NONE
; break;
355 case MMC_RSP_R1_NO_CRC
:
357 case MMC_RSP_R1B
: c
|= RESP_R1B
; break;
358 case MMC_RSP_R2
: c
|= RESP_R2
; break;
359 case MMC_RSP_R3
: c
|= RESP_R3
; break;
361 pr_debug("Unknown response type %d\n", mmc_resp_type(cmd
));
367 /* FIXME - this seems to be ok commented out but the spec suggest this bit
368 * should be set when issuing app commands.
369 * if(cmd->flags & MMC_FLAG_ACMD)
374 if (data
->blocks
> 1) {
375 sd_ctrl_write16(host
, CTL_STOP_INTERNAL_ACTION
, TMIO_STOP_SEC
);
379 * Disable auto CMD12 at IO_RW_EXTENDED and
380 * SET_BLOCK_COUNT when doing multiple block transfer
382 if ((host
->pdata
->flags
& TMIO_MMC_HAVE_CMD12_CTRL
) &&
383 (cmd
->opcode
== SD_IO_RW_EXTENDED
|| host
->mrq
->sbc
))
386 if (data
->flags
& MMC_DATA_READ
)
390 if (!host
->native_hotplug
)
391 irq_mask
&= ~(TMIO_STAT_CARD_REMOVE
| TMIO_STAT_CARD_INSERT
);
392 tmio_mmc_enable_mmc_irqs(host
, irq_mask
);
394 /* Fire off the command */
395 sd_ctrl_write32_as_16_and_16(host
, CTL_ARG_REG
, cmd
->arg
);
396 sd_ctrl_write16(host
, CTL_SD_CMD
, c
);
401 static void tmio_mmc_transfer_data(struct tmio_mmc_host
*host
,
405 int is_read
= host
->data
->flags
& MMC_DATA_READ
;
411 if (host
->pdata
->flags
& TMIO_MMC_32BIT_DATA_PORT
) {
413 u32
*buf32
= (u32
*)buf
;
416 sd_ctrl_read32_rep(host
, CTL_SD_DATA_PORT
, buf32
,
419 sd_ctrl_write32_rep(host
, CTL_SD_DATA_PORT
, buf32
,
422 /* if count was multiple of 4 */
430 sd_ctrl_read32_rep(host
, CTL_SD_DATA_PORT
, &data
, 1);
431 memcpy(buf32
, &data
, count
);
433 memcpy(&data
, buf32
, count
);
434 sd_ctrl_write32_rep(host
, CTL_SD_DATA_PORT
, &data
, 1);
441 sd_ctrl_read16_rep(host
, CTL_SD_DATA_PORT
, buf
, count
>> 1);
443 sd_ctrl_write16_rep(host
, CTL_SD_DATA_PORT
, buf
, count
>> 1);
445 /* if count was even number */
449 /* if count was odd number */
450 buf8
= (u8
*)(buf
+ (count
>> 1));
455 * driver and this function are assuming that
456 * it is used as little endian
459 *buf8
= sd_ctrl_read16(host
, CTL_SD_DATA_PORT
) & 0xff;
461 sd_ctrl_write16(host
, CTL_SD_DATA_PORT
, *buf8
);
465 * This chip always returns (at least?) as much data as you ask for.
466 * I'm unsure what happens if you ask for less than a block. This should be
467 * looked into to ensure that a funny length read doesn't hose the controller.
469 static void tmio_mmc_pio_irq(struct tmio_mmc_host
*host
)
471 struct mmc_data
*data
= host
->data
;
477 if ((host
->chan_tx
|| host
->chan_rx
) && !host
->force_pio
) {
478 pr_err("PIO IRQ in DMA mode!\n");
481 pr_debug("Spurious PIO IRQ\n");
485 sg_virt
= tmio_mmc_kmap_atomic(host
->sg_ptr
, &flags
);
486 buf
= (unsigned short *)(sg_virt
+ host
->sg_off
);
488 count
= host
->sg_ptr
->length
- host
->sg_off
;
489 if (count
> data
->blksz
)
492 pr_debug("count: %08x offset: %08x flags %08x\n",
493 count
, host
->sg_off
, data
->flags
);
495 /* Transfer the data */
496 tmio_mmc_transfer_data(host
, buf
, count
);
498 host
->sg_off
+= count
;
500 tmio_mmc_kunmap_atomic(host
->sg_ptr
, &flags
, sg_virt
);
502 if (host
->sg_off
== host
->sg_ptr
->length
)
503 tmio_mmc_next_sg(host
);
506 static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host
*host
)
508 if (host
->sg_ptr
== &host
->bounce_sg
) {
510 void *sg_vaddr
= tmio_mmc_kmap_atomic(host
->sg_orig
, &flags
);
512 memcpy(sg_vaddr
, host
->bounce_buf
, host
->bounce_sg
.length
);
513 tmio_mmc_kunmap_atomic(host
->sg_orig
, &flags
, sg_vaddr
);
517 /* needs to be called with host->lock held */
518 void tmio_mmc_do_data_irq(struct tmio_mmc_host
*host
)
520 struct mmc_data
*data
= host
->data
;
521 struct mmc_command
*stop
;
526 dev_warn(&host
->pdev
->dev
, "Spurious data end IRQ\n");
531 /* FIXME - return correct transfer count on errors */
533 data
->bytes_xfered
= data
->blocks
* data
->blksz
;
535 data
->bytes_xfered
= 0;
537 pr_debug("Completed data request\n");
540 * FIXME: other drivers allow an optional stop command of any given type
541 * which we dont do, as the chip can auto generate them.
542 * Perhaps we can be smarter about when to use auto CMD12 and
543 * only issue the auto request when we know this is the desired
544 * stop command, allowing fallback to the stop command the
545 * upper layers expect. For now, we do what works.
548 if (data
->flags
& MMC_DATA_READ
) {
549 if (host
->chan_rx
&& !host
->force_pio
)
550 tmio_mmc_check_bounce_buffer(host
);
551 dev_dbg(&host
->pdev
->dev
, "Complete Rx request %p\n",
554 dev_dbg(&host
->pdev
->dev
, "Complete Tx request %p\n",
558 if (stop
&& !host
->mrq
->sbc
) {
559 if (stop
->opcode
!= MMC_STOP_TRANSMISSION
|| stop
->arg
)
560 dev_err(&host
->pdev
->dev
, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n",
561 stop
->opcode
, stop
->arg
);
563 /* fill in response from auto CMD12 */
564 stop
->resp
[0] = sd_ctrl_read16_and_16_as_32(host
, CTL_RESPONSE
);
566 sd_ctrl_write16(host
, CTL_STOP_INTERNAL_ACTION
, 0);
569 schedule_work(&host
->done
);
571 EXPORT_SYMBOL_GPL(tmio_mmc_do_data_irq
);
573 static void tmio_mmc_data_irq(struct tmio_mmc_host
*host
, unsigned int stat
)
575 struct mmc_data
*data
;
577 spin_lock(&host
->lock
);
583 if (stat
& TMIO_STAT_CRCFAIL
|| stat
& TMIO_STAT_STOPBIT_ERR
||
584 stat
& TMIO_STAT_TXUNDERRUN
)
585 data
->error
= -EILSEQ
;
586 if (host
->chan_tx
&& (data
->flags
& MMC_DATA_WRITE
) && !host
->force_pio
) {
587 u32 status
= sd_ctrl_read16_and_16_as_32(host
, CTL_STATUS
);
591 * Has all data been written out yet? Testing on SuperH showed,
592 * that in most cases the first interrupt comes already with the
593 * BUSY status bit clear, but on some operations, like mount or
594 * in the beginning of a write / sync / umount, there is one
595 * DATAEND interrupt with the BUSY bit set, in this cases
596 * waiting for one more interrupt fixes the problem.
598 if (host
->pdata
->flags
& TMIO_MMC_HAS_IDLE_WAIT
) {
599 if (status
& TMIO_STAT_SCLKDIVEN
)
602 if (!(status
& TMIO_STAT_CMD_BUSY
))
607 tmio_mmc_disable_mmc_irqs(host
, TMIO_STAT_DATAEND
);
608 complete(&host
->dma_dataend
);
610 } else if (host
->chan_rx
&& (data
->flags
& MMC_DATA_READ
) && !host
->force_pio
) {
611 tmio_mmc_disable_mmc_irqs(host
, TMIO_STAT_DATAEND
);
612 complete(&host
->dma_dataend
);
614 tmio_mmc_do_data_irq(host
);
615 tmio_mmc_disable_mmc_irqs(host
, TMIO_MASK_READOP
| TMIO_MASK_WRITEOP
);
618 spin_unlock(&host
->lock
);
621 static void tmio_mmc_cmd_irq(struct tmio_mmc_host
*host
, unsigned int stat
)
623 struct mmc_command
*cmd
= host
->cmd
;
626 spin_lock(&host
->lock
);
629 pr_debug("Spurious CMD irq\n");
633 /* This controller is sicker than the PXA one. Not only do we need to
634 * drop the top 8 bits of the first response word, we also need to
635 * modify the order of the response for short response command types.
638 for (i
= 3, addr
= CTL_RESPONSE
; i
>= 0 ; i
--, addr
+= 4)
639 cmd
->resp
[i
] = sd_ctrl_read16_and_16_as_32(host
, addr
);
641 if (cmd
->flags
& MMC_RSP_136
) {
642 cmd
->resp
[0] = (cmd
->resp
[0] << 8) | (cmd
->resp
[1] >> 24);
643 cmd
->resp
[1] = (cmd
->resp
[1] << 8) | (cmd
->resp
[2] >> 24);
644 cmd
->resp
[2] = (cmd
->resp
[2] << 8) | (cmd
->resp
[3] >> 24);
646 } else if (cmd
->flags
& MMC_RSP_R3
) {
647 cmd
->resp
[0] = cmd
->resp
[3];
650 if (stat
& TMIO_STAT_CMDTIMEOUT
)
651 cmd
->error
= -ETIMEDOUT
;
652 else if ((stat
& TMIO_STAT_CRCFAIL
&& cmd
->flags
& MMC_RSP_CRC
) ||
653 stat
& TMIO_STAT_STOPBIT_ERR
||
654 stat
& TMIO_STAT_CMD_IDX_ERR
)
655 cmd
->error
= -EILSEQ
;
657 /* If there is data to handle we enable data IRQs here, and
658 * we will ultimatley finish the request in the data_end handler.
659 * If theres no data or we encountered an error, finish now.
661 if (host
->data
&& (!cmd
->error
|| cmd
->error
== -EILSEQ
)) {
662 if (host
->data
->flags
& MMC_DATA_READ
) {
663 if (host
->force_pio
|| !host
->chan_rx
)
664 tmio_mmc_enable_mmc_irqs(host
, TMIO_MASK_READOP
);
666 tasklet_schedule(&host
->dma_issue
);
668 if (host
->force_pio
|| !host
->chan_tx
)
669 tmio_mmc_enable_mmc_irqs(host
, TMIO_MASK_WRITEOP
);
671 tasklet_schedule(&host
->dma_issue
);
674 schedule_work(&host
->done
);
678 spin_unlock(&host
->lock
);
681 static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host
*host
,
682 int ireg
, int status
)
684 struct mmc_host
*mmc
= host
->mmc
;
686 /* Card insert / remove attempts */
687 if (ireg
& (TMIO_STAT_CARD_INSERT
| TMIO_STAT_CARD_REMOVE
)) {
688 tmio_mmc_ack_mmc_irqs(host
, TMIO_STAT_CARD_INSERT
|
689 TMIO_STAT_CARD_REMOVE
);
690 if ((((ireg
& TMIO_STAT_CARD_REMOVE
) && mmc
->card
) ||
691 ((ireg
& TMIO_STAT_CARD_INSERT
) && !mmc
->card
)) &&
692 !work_pending(&mmc
->detect
.work
))
693 mmc_detect_change(host
->mmc
, msecs_to_jiffies(100));
700 static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host
*host
, int ireg
,
703 /* Command completion */
704 if (ireg
& (TMIO_STAT_CMDRESPEND
| TMIO_STAT_CMDTIMEOUT
)) {
705 tmio_mmc_ack_mmc_irqs(host
, TMIO_STAT_CMDRESPEND
|
706 TMIO_STAT_CMDTIMEOUT
);
707 tmio_mmc_cmd_irq(host
, status
);
712 if (ireg
& (TMIO_STAT_RXRDY
| TMIO_STAT_TXRQ
)) {
713 tmio_mmc_ack_mmc_irqs(host
, TMIO_STAT_RXRDY
| TMIO_STAT_TXRQ
);
714 tmio_mmc_pio_irq(host
);
718 /* Data transfer completion */
719 if (ireg
& TMIO_STAT_DATAEND
) {
720 tmio_mmc_ack_mmc_irqs(host
, TMIO_STAT_DATAEND
);
721 tmio_mmc_data_irq(host
, status
);
728 static void __tmio_mmc_sdio_irq(struct tmio_mmc_host
*host
)
730 struct mmc_host
*mmc
= host
->mmc
;
731 struct tmio_mmc_data
*pdata
= host
->pdata
;
732 unsigned int ireg
, status
;
733 unsigned int sdio_status
;
735 if (!(pdata
->flags
& TMIO_MMC_SDIO_IRQ
))
738 status
= sd_ctrl_read16(host
, CTL_SDIO_STATUS
);
739 ireg
= status
& TMIO_SDIO_MASK_ALL
& ~host
->sdio_irq_mask
;
741 sdio_status
= status
& ~TMIO_SDIO_MASK_ALL
;
742 if (pdata
->flags
& TMIO_MMC_SDIO_STATUS_SETBITS
)
743 sdio_status
|= TMIO_SDIO_SETBITS_MASK
;
745 sd_ctrl_write16(host
, CTL_SDIO_STATUS
, sdio_status
);
747 if (mmc
->caps
& MMC_CAP_SDIO_IRQ
&& ireg
& TMIO_SDIO_STAT_IOIRQ
)
748 mmc_signal_sdio_irq(mmc
);
751 irqreturn_t
tmio_mmc_irq(int irq
, void *devid
)
753 struct tmio_mmc_host
*host
= devid
;
754 unsigned int ireg
, status
;
756 status
= sd_ctrl_read16_and_16_as_32(host
, CTL_STATUS
);
757 ireg
= status
& TMIO_MASK_IRQ
& ~host
->sdcard_irq_mask
;
759 pr_debug_status(status
);
760 pr_debug_status(ireg
);
762 /* Clear the status except the interrupt status */
763 sd_ctrl_write32_as_16_and_16(host
, CTL_STATUS
, TMIO_MASK_IRQ
);
765 if (__tmio_mmc_card_detect_irq(host
, ireg
, status
))
767 if (__tmio_mmc_sdcard_irq(host
, ireg
, status
))
770 __tmio_mmc_sdio_irq(host
);
774 EXPORT_SYMBOL_GPL(tmio_mmc_irq
);
776 static int tmio_mmc_start_data(struct tmio_mmc_host
*host
,
777 struct mmc_data
*data
)
779 struct tmio_mmc_data
*pdata
= host
->pdata
;
781 pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
782 data
->blksz
, data
->blocks
);
784 /* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
785 if (host
->mmc
->ios
.bus_width
== MMC_BUS_WIDTH_4
||
786 host
->mmc
->ios
.bus_width
== MMC_BUS_WIDTH_8
) {
787 int blksz_2bytes
= pdata
->flags
& TMIO_MMC_BLKSZ_2BYTES
;
789 if (data
->blksz
< 2 || (data
->blksz
< 4 && !blksz_2bytes
)) {
790 pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
791 mmc_hostname(host
->mmc
), data
->blksz
);
796 tmio_mmc_init_sg(host
, data
);
799 /* Set transfer length / blocksize */
800 sd_ctrl_write16(host
, CTL_SD_XFER_LEN
, data
->blksz
);
801 sd_ctrl_write16(host
, CTL_XFER_BLK_COUNT
, data
->blocks
);
803 tmio_mmc_start_dma(host
, data
);
808 static void tmio_mmc_hw_reset(struct mmc_host
*mmc
)
810 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
813 host
->hw_reset(host
);
816 static int tmio_mmc_execute_tuning(struct mmc_host
*mmc
, u32 opcode
)
818 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
821 if (!host
->init_tuning
|| !host
->select_tuning
)
822 /* Tuning is not supported */
825 host
->tap_num
= host
->init_tuning(host
);
827 /* Tuning is not supported */
830 if (host
->tap_num
* 2 >= sizeof(host
->taps
) * BITS_PER_BYTE
) {
831 dev_warn_once(&host
->pdev
->dev
,
832 "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
836 bitmap_zero(host
->taps
, host
->tap_num
* 2);
838 /* Issue CMD19 twice for each tap */
839 for (i
= 0; i
< 2 * host
->tap_num
; i
++) {
840 if (host
->prepare_tuning
)
841 host
->prepare_tuning(host
, i
% host
->tap_num
);
843 ret
= mmc_send_tuning(mmc
, opcode
, NULL
);
844 if (ret
&& ret
!= -EILSEQ
)
847 set_bit(i
, host
->taps
);
852 ret
= host
->select_tuning(host
);
856 dev_warn(&host
->pdev
->dev
, "Tuning procedure failed\n");
857 tmio_mmc_hw_reset(mmc
);
863 static void tmio_process_mrq(struct tmio_mmc_host
*host
,
864 struct mmc_request
*mrq
)
866 struct mmc_command
*cmd
;
869 if (mrq
->sbc
&& host
->cmd
!= mrq
->sbc
) {
874 ret
= tmio_mmc_start_data(host
, mrq
->data
);
880 ret
= tmio_mmc_start_command(host
, cmd
);
884 schedule_delayed_work(&host
->delayed_reset_work
,
885 msecs_to_jiffies(CMDREQ_TIMEOUT
));
889 host
->force_pio
= false;
891 mrq
->cmd
->error
= ret
;
892 mmc_request_done(host
->mmc
, mrq
);
895 /* Process requests from the MMC layer */
896 static void tmio_mmc_request(struct mmc_host
*mmc
, struct mmc_request
*mrq
)
898 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
901 spin_lock_irqsave(&host
->lock
, flags
);
904 pr_debug("request not null\n");
905 if (IS_ERR(host
->mrq
)) {
906 spin_unlock_irqrestore(&host
->lock
, flags
);
907 mrq
->cmd
->error
= -EAGAIN
;
908 mmc_request_done(mmc
, mrq
);
913 host
->last_req_ts
= jiffies
;
917 spin_unlock_irqrestore(&host
->lock
, flags
);
919 tmio_process_mrq(host
, mrq
);
922 static void tmio_mmc_finish_request(struct tmio_mmc_host
*host
)
924 struct mmc_request
*mrq
;
927 spin_lock_irqsave(&host
->lock
, flags
);
930 if (IS_ERR_OR_NULL(mrq
)) {
931 spin_unlock_irqrestore(&host
->lock
, flags
);
935 /* If not SET_BLOCK_COUNT, clear old data */
936 if (host
->cmd
!= mrq
->sbc
) {
939 host
->force_pio
= false;
943 cancel_delayed_work(&host
->delayed_reset_work
);
945 spin_unlock_irqrestore(&host
->lock
, flags
);
947 if (mrq
->cmd
->error
|| (mrq
->data
&& mrq
->data
->error
))
948 tmio_mmc_abort_dma(host
);
950 if (host
->check_scc_error
)
951 host
->check_scc_error(host
);
953 /* If SET_BLOCK_COUNT, continue with main command */
955 tmio_process_mrq(host
, mrq
);
959 mmc_request_done(host
->mmc
, mrq
);
962 static void tmio_mmc_done_work(struct work_struct
*work
)
964 struct tmio_mmc_host
*host
= container_of(work
, struct tmio_mmc_host
,
966 tmio_mmc_finish_request(host
);
969 static int tmio_mmc_clk_enable(struct tmio_mmc_host
*host
)
971 if (!host
->clk_enable
)
974 return host
->clk_enable(host
);
977 static void tmio_mmc_clk_disable(struct tmio_mmc_host
*host
)
979 if (host
->clk_disable
)
980 host
->clk_disable(host
);
983 static void tmio_mmc_power_on(struct tmio_mmc_host
*host
, unsigned short vdd
)
985 struct mmc_host
*mmc
= host
->mmc
;
988 /* .set_ios() is returning void, so, no chance to report an error */
991 host
->set_pwr(host
->pdev
, 1);
993 if (!IS_ERR(mmc
->supply
.vmmc
)) {
994 ret
= mmc_regulator_set_ocr(mmc
, mmc
->supply
.vmmc
, vdd
);
996 * Attention: empiric value. With a b43 WiFi SDIO card this
997 * delay proved necessary for reliable card-insertion probing.
998 * 100us were not enough. Is this the same 140us delay, as in
999 * tmio_mmc_set_ios()?
1004 * It seems, VccQ should be switched on after Vcc, this is also what the
1005 * omap_hsmmc.c driver does.
1007 if (!IS_ERR(mmc
->supply
.vqmmc
) && !ret
) {
1008 ret
= regulator_enable(mmc
->supply
.vqmmc
);
1013 dev_dbg(&host
->pdev
->dev
, "Regulators failed to power up: %d\n",
1017 static void tmio_mmc_power_off(struct tmio_mmc_host
*host
)
1019 struct mmc_host
*mmc
= host
->mmc
;
1021 if (!IS_ERR(mmc
->supply
.vqmmc
))
1022 regulator_disable(mmc
->supply
.vqmmc
);
1024 if (!IS_ERR(mmc
->supply
.vmmc
))
1025 mmc_regulator_set_ocr(mmc
, mmc
->supply
.vmmc
, 0);
1028 host
->set_pwr(host
->pdev
, 0);
1031 static void tmio_mmc_set_bus_width(struct tmio_mmc_host
*host
,
1032 unsigned char bus_width
)
1034 u16 reg
= sd_ctrl_read16(host
, CTL_SD_MEM_CARD_OPT
)
1035 & ~(CARD_OPT_WIDTH
| CARD_OPT_WIDTH8
);
1037 /* reg now applies to MMC_BUS_WIDTH_4 */
1038 if (bus_width
== MMC_BUS_WIDTH_1
)
1039 reg
|= CARD_OPT_WIDTH
;
1040 else if (bus_width
== MMC_BUS_WIDTH_8
)
1041 reg
|= CARD_OPT_WIDTH8
;
1043 sd_ctrl_write16(host
, CTL_SD_MEM_CARD_OPT
, reg
);
1046 /* Set MMC clock / power.
1047 * Note: This controller uses a simple divider scheme therefore it cannot
1048 * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
1049 * MMC wont run that fast, it has to be clocked at 12MHz which is the next
1052 static void tmio_mmc_set_ios(struct mmc_host
*mmc
, struct mmc_ios
*ios
)
1054 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
1055 struct device
*dev
= &host
->pdev
->dev
;
1056 unsigned long flags
;
1058 mutex_lock(&host
->ios_lock
);
1060 spin_lock_irqsave(&host
->lock
, flags
);
1062 if (IS_ERR(host
->mrq
)) {
1064 "%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
1065 current
->comm
, task_pid_nr(current
),
1066 ios
->clock
, ios
->power_mode
);
1067 host
->mrq
= ERR_PTR(-EINTR
);
1070 "%s.%d: CMD%u active since %lu, now %lu!\n",
1071 current
->comm
, task_pid_nr(current
),
1072 host
->mrq
->cmd
->opcode
, host
->last_req_ts
,
1075 spin_unlock_irqrestore(&host
->lock
, flags
);
1077 mutex_unlock(&host
->ios_lock
);
1081 host
->mrq
= ERR_PTR(-EBUSY
);
1083 spin_unlock_irqrestore(&host
->lock
, flags
);
1085 switch (ios
->power_mode
) {
1087 tmio_mmc_power_off(host
);
1088 tmio_mmc_clk_stop(host
);
1091 tmio_mmc_power_on(host
, ios
->vdd
);
1092 tmio_mmc_set_clock(host
, ios
->clock
);
1093 tmio_mmc_set_bus_width(host
, ios
->bus_width
);
1096 tmio_mmc_set_clock(host
, ios
->clock
);
1097 tmio_mmc_set_bus_width(host
, ios
->bus_width
);
1101 /* Let things settle. delay taken from winCE driver */
1103 if (PTR_ERR(host
->mrq
) == -EINTR
)
1104 dev_dbg(&host
->pdev
->dev
,
1105 "%s.%d: IOS interrupted: clk %u, mode %u",
1106 current
->comm
, task_pid_nr(current
),
1107 ios
->clock
, ios
->power_mode
);
1110 host
->clk_cache
= ios
->clock
;
1112 mutex_unlock(&host
->ios_lock
);
1115 static int tmio_mmc_get_ro(struct mmc_host
*mmc
)
1117 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
1118 struct tmio_mmc_data
*pdata
= host
->pdata
;
1119 int ret
= mmc_gpio_get_ro(mmc
);
1124 ret
= !((pdata
->flags
& TMIO_MMC_WRPROTECT_DISABLE
) ||
1125 (sd_ctrl_read16_and_16_as_32(host
, CTL_STATUS
) & TMIO_STAT_WRPROTECT
));
1130 static int tmio_multi_io_quirk(struct mmc_card
*card
,
1131 unsigned int direction
, int blk_size
)
1133 struct tmio_mmc_host
*host
= mmc_priv(card
->host
);
1135 if (host
->multi_io_quirk
)
1136 return host
->multi_io_quirk(card
, direction
, blk_size
);
1141 static struct mmc_host_ops tmio_mmc_ops
= {
1142 .request
= tmio_mmc_request
,
1143 .set_ios
= tmio_mmc_set_ios
,
1144 .get_ro
= tmio_mmc_get_ro
,
1145 .get_cd
= mmc_gpio_get_cd
,
1146 .enable_sdio_irq
= tmio_mmc_enable_sdio_irq
,
1147 .multi_io_quirk
= tmio_multi_io_quirk
,
1148 .hw_reset
= tmio_mmc_hw_reset
,
1149 .execute_tuning
= tmio_mmc_execute_tuning
,
1152 static int tmio_mmc_init_ocr(struct tmio_mmc_host
*host
)
1154 struct tmio_mmc_data
*pdata
= host
->pdata
;
1155 struct mmc_host
*mmc
= host
->mmc
;
1157 mmc_regulator_get_supply(mmc
);
1159 /* use ocr_mask if no regulator */
1160 if (!mmc
->ocr_avail
)
1161 mmc
->ocr_avail
= pdata
->ocr_mask
;
1165 * There is possibility that regulator has not been probed
1167 if (!mmc
->ocr_avail
)
1168 return -EPROBE_DEFER
;
1173 static void tmio_mmc_of_parse(struct platform_device
*pdev
,
1174 struct tmio_mmc_data
*pdata
)
1176 const struct device_node
*np
= pdev
->dev
.of_node
;
1181 if (of_get_property(np
, "toshiba,mmc-wrprotect-disable", NULL
))
1182 pdata
->flags
|= TMIO_MMC_WRPROTECT_DISABLE
;
1185 struct tmio_mmc_host
*
1186 tmio_mmc_host_alloc(struct platform_device
*pdev
)
1188 struct tmio_mmc_host
*host
;
1189 struct mmc_host
*mmc
;
1191 mmc
= mmc_alloc_host(sizeof(struct tmio_mmc_host
), &pdev
->dev
);
1195 host
= mmc_priv(mmc
);
1201 EXPORT_SYMBOL_GPL(tmio_mmc_host_alloc
);
1203 void tmio_mmc_host_free(struct tmio_mmc_host
*host
)
1205 mmc_free_host(host
->mmc
);
1207 EXPORT_SYMBOL_GPL(tmio_mmc_host_free
);
1209 int tmio_mmc_host_probe(struct tmio_mmc_host
*_host
,
1210 struct tmio_mmc_data
*pdata
,
1211 const struct tmio_mmc_dma_ops
*dma_ops
)
1213 struct platform_device
*pdev
= _host
->pdev
;
1214 struct mmc_host
*mmc
= _host
->mmc
;
1215 struct resource
*res_ctl
;
1217 u32 irq_mask
= TMIO_MASK_CMD
;
1219 tmio_mmc_of_parse(pdev
, pdata
);
1221 if (!(pdata
->flags
& TMIO_MMC_HAS_IDLE_WAIT
))
1222 _host
->write16_hook
= NULL
;
1224 res_ctl
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1228 ret
= mmc_of_parse(mmc
);
1232 _host
->pdata
= pdata
;
1233 platform_set_drvdata(pdev
, mmc
);
1235 _host
->set_pwr
= pdata
->set_pwr
;
1236 _host
->set_clk_div
= pdata
->set_clk_div
;
1238 ret
= tmio_mmc_init_ocr(_host
);
1242 _host
->ctl
= devm_ioremap(&pdev
->dev
,
1243 res_ctl
->start
, resource_size(res_ctl
));
1247 tmio_mmc_ops
.card_busy
= _host
->card_busy
;
1248 tmio_mmc_ops
.start_signal_voltage_switch
=
1249 _host
->start_signal_voltage_switch
;
1250 mmc
->ops
= &tmio_mmc_ops
;
1252 mmc
->caps
|= MMC_CAP_4_BIT_DATA
| pdata
->capabilities
;
1253 mmc
->caps2
|= pdata
->capabilities2
;
1255 mmc
->max_blk_size
= 512;
1256 mmc
->max_blk_count
= (PAGE_SIZE
/ mmc
->max_blk_size
) *
1258 mmc
->max_req_size
= mmc
->max_blk_size
* mmc
->max_blk_count
;
1259 mmc
->max_seg_size
= mmc
->max_req_size
;
1261 _host
->native_hotplug
= !(pdata
->flags
& TMIO_MMC_USE_GPIO_CD
||
1262 mmc
->caps
& MMC_CAP_NEEDS_POLL
||
1263 !mmc_card_is_removable(mmc
));
1266 * On Gen2+, eMMC with NONREMOVABLE currently fails because native
1267 * hotplug gets disabled. It seems RuntimePM related yet we need further
1268 * research. Since we are planning a PM overhaul anyway, let's enforce
1269 * for now the device being active by enabling native hotplug always.
1271 if (pdata
->flags
& TMIO_MMC_MIN_RCAR2
)
1272 _host
->native_hotplug
= true;
1274 if (tmio_mmc_clk_enable(_host
) < 0) {
1275 mmc
->f_max
= pdata
->hclk
;
1276 mmc
->f_min
= mmc
->f_max
/ 512;
1280 * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
1281 * looping forever...
1283 if (mmc
->f_min
== 0)
1287 * While using internal tmio hardware logic for card detection, we need
1288 * to ensure it stays powered for it to work.
1290 if (_host
->native_hotplug
)
1291 pm_runtime_get_noresume(&pdev
->dev
);
1293 _host
->sdio_irq_enabled
= false;
1294 if (pdata
->flags
& TMIO_MMC_SDIO_IRQ
)
1295 _host
->sdio_irq_mask
= TMIO_SDIO_MASK_ALL
;
1297 tmio_mmc_clk_stop(_host
);
1298 tmio_mmc_reset(_host
);
1300 _host
->sdcard_irq_mask
= sd_ctrl_read16_and_16_as_32(_host
, CTL_IRQ_MASK
);
1301 tmio_mmc_disable_mmc_irqs(_host
, TMIO_MASK_ALL
);
1303 /* Unmask the IRQs we want to know about */
1304 if (!_host
->chan_rx
)
1305 irq_mask
|= TMIO_MASK_READOP
;
1306 if (!_host
->chan_tx
)
1307 irq_mask
|= TMIO_MASK_WRITEOP
;
1308 if (!_host
->native_hotplug
)
1309 irq_mask
&= ~(TMIO_STAT_CARD_REMOVE
| TMIO_STAT_CARD_INSERT
);
1311 _host
->sdcard_irq_mask
&= ~irq_mask
;
1313 spin_lock_init(&_host
->lock
);
1314 mutex_init(&_host
->ios_lock
);
1316 /* Init delayed work for request timeouts */
1317 INIT_DELAYED_WORK(&_host
->delayed_reset_work
, tmio_mmc_reset_work
);
1318 INIT_WORK(&_host
->done
, tmio_mmc_done_work
);
1320 /* See if we also get DMA */
1321 _host
->dma_ops
= dma_ops
;
1322 tmio_mmc_request_dma(_host
, pdata
);
1324 pm_runtime_set_active(&pdev
->dev
);
1325 pm_runtime_set_autosuspend_delay(&pdev
->dev
, 50);
1326 pm_runtime_use_autosuspend(&pdev
->dev
);
1327 pm_runtime_enable(&pdev
->dev
);
1329 ret
= mmc_add_host(mmc
);
1331 tmio_mmc_host_remove(_host
);
1335 dev_pm_qos_expose_latency_limit(&pdev
->dev
, 100);
1337 if (pdata
->flags
& TMIO_MMC_USE_GPIO_CD
) {
1338 ret
= mmc_gpio_request_cd(mmc
, pdata
->cd_gpio
, 0);
1340 tmio_mmc_host_remove(_host
);
1343 mmc_gpiod_request_cd_irq(mmc
);
1348 EXPORT_SYMBOL_GPL(tmio_mmc_host_probe
);
1350 void tmio_mmc_host_remove(struct tmio_mmc_host
*host
)
1352 struct platform_device
*pdev
= host
->pdev
;
1353 struct mmc_host
*mmc
= host
->mmc
;
1355 if (host
->pdata
->flags
& TMIO_MMC_SDIO_IRQ
)
1356 sd_ctrl_write16(host
, CTL_TRANSACTION_CTL
, 0x0000);
1358 if (!host
->native_hotplug
)
1359 pm_runtime_get_sync(&pdev
->dev
);
1361 dev_pm_qos_hide_latency_limit(&pdev
->dev
);
1363 mmc_remove_host(mmc
);
1364 cancel_work_sync(&host
->done
);
1365 cancel_delayed_work_sync(&host
->delayed_reset_work
);
1366 tmio_mmc_release_dma(host
);
1368 pm_runtime_put_sync(&pdev
->dev
);
1369 pm_runtime_disable(&pdev
->dev
);
1371 tmio_mmc_clk_disable(host
);
1373 EXPORT_SYMBOL_GPL(tmio_mmc_host_remove
);
1376 int tmio_mmc_host_runtime_suspend(struct device
*dev
)
1378 struct mmc_host
*mmc
= dev_get_drvdata(dev
);
1379 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
1381 tmio_mmc_disable_mmc_irqs(host
, TMIO_MASK_ALL
);
1383 if (host
->clk_cache
)
1384 tmio_mmc_clk_stop(host
);
1386 tmio_mmc_clk_disable(host
);
1390 EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_suspend
);
1392 static bool tmio_mmc_can_retune(struct tmio_mmc_host
*host
)
1394 return host
->tap_num
&& mmc_can_retune(host
->mmc
);
1397 int tmio_mmc_host_runtime_resume(struct device
*dev
)
1399 struct mmc_host
*mmc
= dev_get_drvdata(dev
);
1400 struct tmio_mmc_host
*host
= mmc_priv(mmc
);
1402 tmio_mmc_reset(host
);
1403 tmio_mmc_clk_enable(host
);
1405 if (host
->clk_cache
)
1406 tmio_mmc_set_clock(host
, host
->clk_cache
);
1408 tmio_mmc_enable_dma(host
, true);
1410 if (tmio_mmc_can_retune(host
) && host
->select_tuning(host
))
1411 dev_warn(&host
->pdev
->dev
, "Tuning selection failed\n");
1415 EXPORT_SYMBOL_GPL(tmio_mmc_host_runtime_resume
);
1418 MODULE_LICENSE("GPL v2");