2 * linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver
4 * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
11 * Thanks to the following companies for their support:
13 * - JMicron (hardware and technical support)
16 #include <linux/delay.h>
17 #include <linux/highmem.h>
19 #include <linux/module.h>
20 #include <linux/dma-mapping.h>
21 #include <linux/slab.h>
22 #include <linux/scatterlist.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/pm_runtime.h>
26 #include <linux/leds.h>
28 #include <linux/mmc/mmc.h>
29 #include <linux/mmc/host.h>
30 #include <linux/mmc/card.h>
31 #include <linux/mmc/sdio.h>
32 #include <linux/mmc/slot-gpio.h>
36 #define DRIVER_NAME "sdhci"
38 #define DBG(f, x...) \
39 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
41 #if defined(CONFIG_LEDS_CLASS) || (defined(CONFIG_LEDS_CLASS_MODULE) && \
42 defined(CONFIG_MMC_SDHCI_MODULE))
43 #define SDHCI_USE_LEDS_CLASS
46 #define MAX_TUNING_LOOP 40
48 static unsigned int debug_quirks
= 0;
49 static unsigned int debug_quirks2
;
51 static void sdhci_finish_data(struct sdhci_host
*);
53 static void sdhci_finish_command(struct sdhci_host
*);
54 static int sdhci_execute_tuning(struct mmc_host
*mmc
, u32 opcode
);
55 static void sdhci_enable_preset_value(struct sdhci_host
*host
, bool enable
);
56 static int sdhci_pre_dma_transfer(struct sdhci_host
*host
,
57 struct mmc_data
*data
,
58 struct sdhci_host_next
*next
);
59 static int sdhci_do_get_cd(struct sdhci_host
*host
);
62 static int sdhci_runtime_pm_get(struct sdhci_host
*host
);
63 static int sdhci_runtime_pm_put(struct sdhci_host
*host
);
64 static void sdhci_runtime_pm_bus_on(struct sdhci_host
*host
);
65 static void sdhci_runtime_pm_bus_off(struct sdhci_host
*host
);
67 static inline int sdhci_runtime_pm_get(struct sdhci_host
*host
)
71 static inline int sdhci_runtime_pm_put(struct sdhci_host
*host
)
75 static void sdhci_runtime_pm_bus_on(struct sdhci_host
*host
)
78 static void sdhci_runtime_pm_bus_off(struct sdhci_host
*host
)
83 static void sdhci_dumpregs(struct sdhci_host
*host
)
85 pr_debug(DRIVER_NAME
": =========== REGISTER DUMP (%s)===========\n",
86 mmc_hostname(host
->mmc
));
88 pr_debug(DRIVER_NAME
": Sys addr: 0x%08x | Version: 0x%08x\n",
89 sdhci_readl(host
, SDHCI_DMA_ADDRESS
),
90 sdhci_readw(host
, SDHCI_HOST_VERSION
));
91 pr_debug(DRIVER_NAME
": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
92 sdhci_readw(host
, SDHCI_BLOCK_SIZE
),
93 sdhci_readw(host
, SDHCI_BLOCK_COUNT
));
94 pr_debug(DRIVER_NAME
": Argument: 0x%08x | Trn mode: 0x%08x\n",
95 sdhci_readl(host
, SDHCI_ARGUMENT
),
96 sdhci_readw(host
, SDHCI_TRANSFER_MODE
));
97 pr_debug(DRIVER_NAME
": Present: 0x%08x | Host ctl: 0x%08x\n",
98 sdhci_readl(host
, SDHCI_PRESENT_STATE
),
99 sdhci_readb(host
, SDHCI_HOST_CONTROL
));
100 pr_debug(DRIVER_NAME
": Power: 0x%08x | Blk gap: 0x%08x\n",
101 sdhci_readb(host
, SDHCI_POWER_CONTROL
),
102 sdhci_readb(host
, SDHCI_BLOCK_GAP_CONTROL
));
103 pr_debug(DRIVER_NAME
": Wake-up: 0x%08x | Clock: 0x%08x\n",
104 sdhci_readb(host
, SDHCI_WAKE_UP_CONTROL
),
105 sdhci_readw(host
, SDHCI_CLOCK_CONTROL
));
106 pr_debug(DRIVER_NAME
": Timeout: 0x%08x | Int stat: 0x%08x\n",
107 sdhci_readb(host
, SDHCI_TIMEOUT_CONTROL
),
108 sdhci_readl(host
, SDHCI_INT_STATUS
));
109 pr_debug(DRIVER_NAME
": Int enab: 0x%08x | Sig enab: 0x%08x\n",
110 sdhci_readl(host
, SDHCI_INT_ENABLE
),
111 sdhci_readl(host
, SDHCI_SIGNAL_ENABLE
));
112 pr_debug(DRIVER_NAME
": AC12 err: 0x%08x | Slot int: 0x%08x\n",
113 sdhci_readw(host
, SDHCI_ACMD12_ERR
),
114 sdhci_readw(host
, SDHCI_SLOT_INT_STATUS
));
115 pr_debug(DRIVER_NAME
": Caps: 0x%08x | Caps_1: 0x%08x\n",
116 sdhci_readl(host
, SDHCI_CAPABILITIES
),
117 sdhci_readl(host
, SDHCI_CAPABILITIES_1
));
118 pr_debug(DRIVER_NAME
": Cmd: 0x%08x | Max curr: 0x%08x\n",
119 sdhci_readw(host
, SDHCI_COMMAND
),
120 sdhci_readl(host
, SDHCI_MAX_CURRENT
));
121 pr_debug(DRIVER_NAME
": Host ctl2: 0x%08x\n",
122 sdhci_readw(host
, SDHCI_HOST_CONTROL2
));
124 if (host
->flags
& SDHCI_USE_ADMA
) {
125 if (host
->flags
& SDHCI_USE_64_BIT_DMA
)
126 pr_debug(DRIVER_NAME
": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x%08x\n",
127 readl(host
->ioaddr
+ SDHCI_ADMA_ERROR
),
128 readl(host
->ioaddr
+ SDHCI_ADMA_ADDRESS_HI
),
129 readl(host
->ioaddr
+ SDHCI_ADMA_ADDRESS
));
131 pr_debug(DRIVER_NAME
": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
132 readl(host
->ioaddr
+ SDHCI_ADMA_ERROR
),
133 readl(host
->ioaddr
+ SDHCI_ADMA_ADDRESS
));
136 pr_debug(DRIVER_NAME
": ===========================================\n");
139 /*****************************************************************************\
141 * Low level functions *
143 \*****************************************************************************/
145 static void sdhci_set_card_detection(struct sdhci_host
*host
, bool enable
)
149 if ((host
->quirks
& SDHCI_QUIRK_BROKEN_CARD_DETECTION
) ||
150 (host
->mmc
->caps
& MMC_CAP_NONREMOVABLE
))
154 present
= sdhci_readl(host
, SDHCI_PRESENT_STATE
) &
157 host
->ier
|= present
? SDHCI_INT_CARD_REMOVE
:
158 SDHCI_INT_CARD_INSERT
;
160 host
->ier
&= ~(SDHCI_INT_CARD_REMOVE
| SDHCI_INT_CARD_INSERT
);
163 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
164 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
167 static void sdhci_enable_card_detection(struct sdhci_host
*host
)
169 sdhci_set_card_detection(host
, true);
172 static void sdhci_disable_card_detection(struct sdhci_host
*host
)
174 sdhci_set_card_detection(host
, false);
177 void sdhci_reset(struct sdhci_host
*host
, u8 mask
)
179 unsigned long timeout
;
181 sdhci_writeb(host
, mask
, SDHCI_SOFTWARE_RESET
);
183 if (mask
& SDHCI_RESET_ALL
) {
185 /* Reset-all turns off SD Bus Power */
186 if (host
->quirks2
& SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON
)
187 sdhci_runtime_pm_bus_off(host
);
190 /* Wait max 100 ms */
193 /* hw clears the bit when it's done */
194 while (sdhci_readb(host
, SDHCI_SOFTWARE_RESET
) & mask
) {
196 pr_err("%s: Reset 0x%x never completed.\n",
197 mmc_hostname(host
->mmc
), (int)mask
);
198 sdhci_dumpregs(host
);
205 EXPORT_SYMBOL_GPL(sdhci_reset
);
207 static void sdhci_do_reset(struct sdhci_host
*host
, u8 mask
)
209 if (host
->quirks
& SDHCI_QUIRK_NO_CARD_NO_RESET
) {
210 if (!(sdhci_readl(host
, SDHCI_PRESENT_STATE
) &
215 host
->ops
->reset(host
, mask
);
217 if (mask
& SDHCI_RESET_ALL
) {
218 if (host
->flags
& (SDHCI_USE_SDMA
| SDHCI_USE_ADMA
)) {
219 if (host
->ops
->enable_dma
)
220 host
->ops
->enable_dma(host
);
223 /* Resetting the controller clears many */
224 host
->preset_enabled
= false;
228 static void sdhci_set_ios(struct mmc_host
*mmc
, struct mmc_ios
*ios
);
230 static void sdhci_init(struct sdhci_host
*host
, int soft
)
233 sdhci_do_reset(host
, SDHCI_RESET_CMD
|SDHCI_RESET_DATA
);
235 sdhci_do_reset(host
, SDHCI_RESET_ALL
);
237 host
->ier
= SDHCI_INT_BUS_POWER
| SDHCI_INT_DATA_END_BIT
|
238 SDHCI_INT_DATA_CRC
| SDHCI_INT_DATA_TIMEOUT
|
239 SDHCI_INT_INDEX
| SDHCI_INT_END_BIT
| SDHCI_INT_CRC
|
240 SDHCI_INT_TIMEOUT
| SDHCI_INT_DATA_END
|
243 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
244 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
247 /* force clock reconfiguration */
249 sdhci_set_ios(host
->mmc
, &host
->mmc
->ios
);
253 static void sdhci_reinit(struct sdhci_host
*host
)
256 sdhci_enable_card_detection(host
);
259 static void sdhci_activate_led(struct sdhci_host
*host
)
263 ctrl
= sdhci_readb(host
, SDHCI_HOST_CONTROL
);
264 ctrl
|= SDHCI_CTRL_LED
;
265 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
268 static void sdhci_deactivate_led(struct sdhci_host
*host
)
272 ctrl
= sdhci_readb(host
, SDHCI_HOST_CONTROL
);
273 ctrl
&= ~SDHCI_CTRL_LED
;
274 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
277 #ifdef SDHCI_USE_LEDS_CLASS
278 static void sdhci_led_control(struct led_classdev
*led
,
279 enum led_brightness brightness
)
281 struct sdhci_host
*host
= container_of(led
, struct sdhci_host
, led
);
284 spin_lock_irqsave(&host
->lock
, flags
);
286 if (host
->runtime_suspended
)
289 if (brightness
== LED_OFF
)
290 sdhci_deactivate_led(host
);
292 sdhci_activate_led(host
);
294 spin_unlock_irqrestore(&host
->lock
, flags
);
298 /*****************************************************************************\
302 \*****************************************************************************/
304 static void sdhci_read_block_pio(struct sdhci_host
*host
)
307 size_t blksize
, len
, chunk
;
308 u32
uninitialized_var(scratch
);
311 DBG("PIO reading\n");
313 blksize
= host
->data
->blksz
;
316 local_irq_save(flags
);
319 BUG_ON(!sg_miter_next(&host
->sg_miter
));
321 len
= min(host
->sg_miter
.length
, blksize
);
324 host
->sg_miter
.consumed
= len
;
326 buf
= host
->sg_miter
.addr
;
330 scratch
= sdhci_readl(host
, SDHCI_BUFFER
);
334 *buf
= scratch
& 0xFF;
343 sg_miter_stop(&host
->sg_miter
);
345 local_irq_restore(flags
);
348 static void sdhci_write_block_pio(struct sdhci_host
*host
)
351 size_t blksize
, len
, chunk
;
355 DBG("PIO writing\n");
357 blksize
= host
->data
->blksz
;
361 local_irq_save(flags
);
364 BUG_ON(!sg_miter_next(&host
->sg_miter
));
366 len
= min(host
->sg_miter
.length
, blksize
);
369 host
->sg_miter
.consumed
= len
;
371 buf
= host
->sg_miter
.addr
;
374 scratch
|= (u32
)*buf
<< (chunk
* 8);
380 if ((chunk
== 4) || ((len
== 0) && (blksize
== 0))) {
381 sdhci_writel(host
, scratch
, SDHCI_BUFFER
);
388 sg_miter_stop(&host
->sg_miter
);
390 local_irq_restore(flags
);
393 static void sdhci_transfer_pio(struct sdhci_host
*host
)
399 if (host
->blocks
== 0)
402 if (host
->data
->flags
& MMC_DATA_READ
)
403 mask
= SDHCI_DATA_AVAILABLE
;
405 mask
= SDHCI_SPACE_AVAILABLE
;
408 * Some controllers (JMicron JMB38x) mess up the buffer bits
409 * for transfers < 4 bytes. As long as it is just one block,
410 * we can ignore the bits.
412 if ((host
->quirks
& SDHCI_QUIRK_BROKEN_SMALL_PIO
) &&
413 (host
->data
->blocks
== 1))
416 while (sdhci_readl(host
, SDHCI_PRESENT_STATE
) & mask
) {
417 if (host
->quirks
& SDHCI_QUIRK_PIO_NEEDS_DELAY
)
420 if (host
->data
->flags
& MMC_DATA_READ
)
421 sdhci_read_block_pio(host
);
423 sdhci_write_block_pio(host
);
426 if (host
->blocks
== 0)
430 DBG("PIO transfer complete.\n");
433 static char *sdhci_kmap_atomic(struct scatterlist
*sg
, unsigned long *flags
)
435 local_irq_save(*flags
);
436 return kmap_atomic(sg_page(sg
)) + sg
->offset
;
439 static void sdhci_kunmap_atomic(void *buffer
, unsigned long *flags
)
441 kunmap_atomic(buffer
);
442 local_irq_restore(*flags
);
445 static void sdhci_adma_write_desc(struct sdhci_host
*host
, void *desc
,
446 dma_addr_t addr
, int len
, unsigned cmd
)
448 struct sdhci_adma2_64_desc
*dma_desc
= desc
;
450 /* 32-bit and 64-bit descriptors have these members in same position */
451 dma_desc
->cmd
= cpu_to_le16(cmd
);
452 dma_desc
->len
= cpu_to_le16(len
);
453 dma_desc
->addr_lo
= cpu_to_le32((u32
)addr
);
455 if (host
->flags
& SDHCI_USE_64_BIT_DMA
)
456 dma_desc
->addr_hi
= cpu_to_le32((u64
)addr
>> 32);
459 static void sdhci_adma_mark_end(void *desc
)
461 struct sdhci_adma2_64_desc
*dma_desc
= desc
;
463 /* 32-bit and 64-bit descriptors have 'cmd' in same position */
464 dma_desc
->cmd
|= cpu_to_le16(ADMA2_END
);
467 static int sdhci_adma_table_pre(struct sdhci_host
*host
,
468 struct mmc_data
*data
)
475 dma_addr_t align_addr
;
478 struct scatterlist
*sg
;
484 * The spec does not specify endianness of descriptor table.
485 * We currently guess that it is LE.
488 if (data
->flags
& MMC_DATA_READ
)
489 direction
= DMA_FROM_DEVICE
;
491 direction
= DMA_TO_DEVICE
;
493 host
->align_addr
= dma_map_single(mmc_dev(host
->mmc
),
494 host
->align_buffer
, host
->align_buffer_sz
, direction
);
495 if (dma_mapping_error(mmc_dev(host
->mmc
), host
->align_addr
))
497 BUG_ON(host
->align_addr
& host
->align_mask
);
499 host
->sg_count
= sdhci_pre_dma_transfer(host
, data
, NULL
);
500 if (host
->sg_count
< 0)
503 desc
= host
->adma_table
;
504 align
= host
->align_buffer
;
506 align_addr
= host
->align_addr
;
508 for_each_sg(data
->sg
, sg
, host
->sg_count
, i
) {
509 addr
= sg_dma_address(sg
);
510 len
= sg_dma_len(sg
);
513 * The SDHCI specification states that ADMA
514 * addresses must be 32-bit aligned. If they
515 * aren't, then we use a bounce buffer for
516 * the (up to three) bytes that screw up the
519 offset
= (host
->align_sz
- (addr
& host
->align_mask
)) &
522 if (data
->flags
& MMC_DATA_WRITE
) {
523 buffer
= sdhci_kmap_atomic(sg
, &flags
);
524 memcpy(align
, buffer
, offset
);
525 sdhci_kunmap_atomic(buffer
, &flags
);
529 sdhci_adma_write_desc(host
, desc
, align_addr
, offset
,
532 BUG_ON(offset
> 65536);
534 align
+= host
->align_sz
;
535 align_addr
+= host
->align_sz
;
537 desc
+= host
->desc_sz
;
546 sdhci_adma_write_desc(host
, desc
, addr
, len
, ADMA2_TRAN_VALID
);
547 desc
+= host
->desc_sz
;
550 * If this triggers then we have a calculation bug
553 WARN_ON((desc
- host
->adma_table
) >= host
->adma_table_sz
);
556 if (host
->quirks
& SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
) {
558 * Mark the last descriptor as the terminating descriptor
560 if (desc
!= host
->adma_table
) {
561 desc
-= host
->desc_sz
;
562 sdhci_adma_mark_end(desc
);
566 * Add a terminating entry.
569 /* nop, end, valid */
570 sdhci_adma_write_desc(host
, desc
, 0, 0, ADMA2_NOP_END_VALID
);
574 * Resync align buffer as we might have changed it.
576 if (data
->flags
& MMC_DATA_WRITE
) {
577 dma_sync_single_for_device(mmc_dev(host
->mmc
),
578 host
->align_addr
, host
->align_buffer_sz
, direction
);
584 dma_unmap_single(mmc_dev(host
->mmc
), host
->align_addr
,
585 host
->align_buffer_sz
, direction
);
590 static void sdhci_adma_table_post(struct sdhci_host
*host
,
591 struct mmc_data
*data
)
595 struct scatterlist
*sg
;
602 if (data
->flags
& MMC_DATA_READ
)
603 direction
= DMA_FROM_DEVICE
;
605 direction
= DMA_TO_DEVICE
;
607 dma_unmap_single(mmc_dev(host
->mmc
), host
->align_addr
,
608 host
->align_buffer_sz
, direction
);
610 /* Do a quick scan of the SG list for any unaligned mappings */
611 has_unaligned
= false;
612 for_each_sg(data
->sg
, sg
, host
->sg_count
, i
)
613 if (sg_dma_address(sg
) & host
->align_mask
) {
614 has_unaligned
= true;
618 if (has_unaligned
&& data
->flags
& MMC_DATA_READ
) {
619 dma_sync_sg_for_cpu(mmc_dev(host
->mmc
), data
->sg
,
620 data
->sg_len
, direction
);
622 align
= host
->align_buffer
;
624 for_each_sg(data
->sg
, sg
, host
->sg_count
, i
) {
625 if (sg_dma_address(sg
) & host
->align_mask
) {
626 size
= host
->align_sz
-
627 (sg_dma_address(sg
) & host
->align_mask
);
629 buffer
= sdhci_kmap_atomic(sg
, &flags
);
630 memcpy(buffer
, align
, size
);
631 sdhci_kunmap_atomic(buffer
, &flags
);
633 align
+= host
->align_sz
;
638 if (!data
->host_cookie
)
639 dma_unmap_sg(mmc_dev(host
->mmc
), data
->sg
,
640 data
->sg_len
, direction
);
643 static u8
sdhci_calc_timeout(struct sdhci_host
*host
, struct mmc_command
*cmd
)
646 struct mmc_data
*data
= cmd
->data
;
647 unsigned target_timeout
, current_timeout
;
650 * If the host controller provides us with an incorrect timeout
651 * value, just skip the check and use 0xE. The hardware may take
652 * longer to time out, but that's much better than having a too-short
655 if (host
->quirks
& SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
)
658 /* Unspecified timeout, assume max */
659 if (!data
&& !cmd
->busy_timeout
)
664 target_timeout
= cmd
->busy_timeout
* 1000;
666 target_timeout
= data
->timeout_ns
/ 1000;
668 target_timeout
+= data
->timeout_clks
/ host
->clock
;
672 * Figure out needed cycles.
673 * We do this in steps in order to fit inside a 32 bit int.
674 * The first step is the minimum timeout, which will have a
675 * minimum resolution of 6 bits:
676 * (1) 2^13*1000 > 2^22,
677 * (2) host->timeout_clk < 2^16
682 current_timeout
= (1 << 13) * 1000 / host
->timeout_clk
;
683 while (current_timeout
< target_timeout
) {
685 current_timeout
<<= 1;
691 DBG("%s: Too large timeout 0x%x requested for CMD%d!\n",
692 mmc_hostname(host
->mmc
), count
, cmd
->opcode
);
699 static void sdhci_set_transfer_irqs(struct sdhci_host
*host
)
701 u32 pio_irqs
= SDHCI_INT_DATA_AVAIL
| SDHCI_INT_SPACE_AVAIL
;
702 u32 dma_irqs
= SDHCI_INT_DMA_END
| SDHCI_INT_ADMA_ERROR
;
704 if (host
->flags
& SDHCI_REQ_USE_DMA
)
705 host
->ier
= (host
->ier
& ~pio_irqs
) | dma_irqs
;
707 host
->ier
= (host
->ier
& ~dma_irqs
) | pio_irqs
;
709 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
710 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
713 static void sdhci_set_timeout(struct sdhci_host
*host
, struct mmc_command
*cmd
)
717 if (host
->ops
->set_timeout
) {
718 host
->ops
->set_timeout(host
, cmd
);
720 count
= sdhci_calc_timeout(host
, cmd
);
721 sdhci_writeb(host
, count
, SDHCI_TIMEOUT_CONTROL
);
725 static void sdhci_prepare_data(struct sdhci_host
*host
, struct mmc_command
*cmd
)
728 struct mmc_data
*data
= cmd
->data
;
733 if (data
|| (cmd
->flags
& MMC_RSP_BUSY
))
734 sdhci_set_timeout(host
, cmd
);
740 BUG_ON(data
->blksz
* data
->blocks
> 524288);
741 BUG_ON(data
->blksz
> host
->mmc
->max_blk_size
);
742 BUG_ON(data
->blocks
> 65535);
745 host
->data_early
= 0;
746 host
->data
->bytes_xfered
= 0;
748 if (host
->flags
& (SDHCI_USE_SDMA
| SDHCI_USE_ADMA
))
749 host
->flags
|= SDHCI_REQ_USE_DMA
;
752 * FIXME: This doesn't account for merging when mapping the
755 if (host
->flags
& SDHCI_REQ_USE_DMA
) {
757 struct scatterlist
*sg
;
760 if (host
->flags
& SDHCI_USE_ADMA
) {
761 if (host
->quirks
& SDHCI_QUIRK_32BIT_ADMA_SIZE
)
764 if (host
->quirks
& SDHCI_QUIRK_32BIT_DMA_SIZE
)
768 if (unlikely(broken
)) {
769 for_each_sg(data
->sg
, sg
, data
->sg_len
, i
) {
770 if (sg
->length
& 0x3) {
771 DBG("Reverting to PIO because of "
772 "transfer size (%d)\n",
774 host
->flags
&= ~SDHCI_REQ_USE_DMA
;
782 * The assumption here being that alignment is the same after
783 * translation to device address space.
785 if (host
->flags
& SDHCI_REQ_USE_DMA
) {
787 struct scatterlist
*sg
;
790 if (host
->flags
& SDHCI_USE_ADMA
) {
792 * As we use 3 byte chunks to work around
793 * alignment problems, we need to check this
796 if (host
->quirks
& SDHCI_QUIRK_32BIT_ADMA_SIZE
)
799 if (host
->quirks
& SDHCI_QUIRK_32BIT_DMA_ADDR
)
803 if (unlikely(broken
)) {
804 for_each_sg(data
->sg
, sg
, data
->sg_len
, i
) {
805 if (sg
->offset
& 0x3) {
806 DBG("Reverting to PIO because of "
808 host
->flags
&= ~SDHCI_REQ_USE_DMA
;
815 if (host
->flags
& SDHCI_REQ_USE_DMA
) {
816 if (host
->flags
& SDHCI_USE_ADMA
) {
817 ret
= sdhci_adma_table_pre(host
, data
);
820 * This only happens when someone fed
821 * us an invalid request.
824 host
->flags
&= ~SDHCI_REQ_USE_DMA
;
826 sdhci_writel(host
, host
->adma_addr
,
828 if (host
->flags
& SDHCI_USE_64_BIT_DMA
)
830 (u64
)host
->adma_addr
>> 32,
831 SDHCI_ADMA_ADDRESS_HI
);
836 sg_cnt
= sdhci_pre_dma_transfer(host
, data
, NULL
);
839 * This only happens when someone fed
840 * us an invalid request.
843 host
->flags
&= ~SDHCI_REQ_USE_DMA
;
845 WARN_ON(sg_cnt
!= 1);
846 sdhci_writel(host
, sg_dma_address(data
->sg
),
853 * Always adjust the DMA selection as some controllers
854 * (e.g. JMicron) can't do PIO properly when the selection
857 if (host
->version
>= SDHCI_SPEC_200
) {
858 ctrl
= sdhci_readb(host
, SDHCI_HOST_CONTROL
);
859 ctrl
&= ~SDHCI_CTRL_DMA_MASK
;
860 if ((host
->flags
& SDHCI_REQ_USE_DMA
) &&
861 (host
->flags
& SDHCI_USE_ADMA
)) {
862 if (host
->flags
& SDHCI_USE_64_BIT_DMA
)
863 ctrl
|= SDHCI_CTRL_ADMA64
;
865 ctrl
|= SDHCI_CTRL_ADMA32
;
867 ctrl
|= SDHCI_CTRL_SDMA
;
869 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
872 if (!(host
->flags
& SDHCI_REQ_USE_DMA
)) {
875 flags
= SG_MITER_ATOMIC
;
876 if (host
->data
->flags
& MMC_DATA_READ
)
877 flags
|= SG_MITER_TO_SG
;
879 flags
|= SG_MITER_FROM_SG
;
880 sg_miter_start(&host
->sg_miter
, data
->sg
, data
->sg_len
, flags
);
881 host
->blocks
= data
->blocks
;
884 sdhci_set_transfer_irqs(host
);
886 /* Set the DMA boundary value and block size */
887 sdhci_writew(host
, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG
,
888 data
->blksz
), SDHCI_BLOCK_SIZE
);
889 sdhci_writew(host
, data
->blocks
, SDHCI_BLOCK_COUNT
);
892 static void sdhci_set_transfer_mode(struct sdhci_host
*host
,
893 struct mmc_command
*cmd
)
896 struct mmc_data
*data
= cmd
->data
;
900 SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD
) {
901 sdhci_writew(host
, 0x0, SDHCI_TRANSFER_MODE
);
903 /* clear Auto CMD settings for no data CMDs */
904 mode
= sdhci_readw(host
, SDHCI_TRANSFER_MODE
);
905 sdhci_writew(host
, mode
& ~(SDHCI_TRNS_AUTO_CMD12
|
906 SDHCI_TRNS_AUTO_CMD23
), SDHCI_TRANSFER_MODE
);
911 WARN_ON(!host
->data
);
913 if (!(host
->quirks2
& SDHCI_QUIRK2_SUPPORT_SINGLE
))
914 mode
= SDHCI_TRNS_BLK_CNT_EN
;
916 if (mmc_op_multi(cmd
->opcode
) || data
->blocks
> 1) {
917 mode
= SDHCI_TRNS_BLK_CNT_EN
| SDHCI_TRNS_MULTI
;
919 * If we are sending CMD23, CMD12 never gets sent
920 * on successful completion (so no Auto-CMD12).
922 if (!host
->mrq
->sbc
&& (host
->flags
& SDHCI_AUTO_CMD12
) &&
923 (cmd
->opcode
!= SD_IO_RW_EXTENDED
))
924 mode
|= SDHCI_TRNS_AUTO_CMD12
;
925 else if (host
->mrq
->sbc
&& (host
->flags
& SDHCI_AUTO_CMD23
)) {
926 mode
|= SDHCI_TRNS_AUTO_CMD23
;
927 sdhci_writel(host
, host
->mrq
->sbc
->arg
, SDHCI_ARGUMENT2
);
931 if (data
->flags
& MMC_DATA_READ
)
932 mode
|= SDHCI_TRNS_READ
;
933 if (host
->flags
& SDHCI_REQ_USE_DMA
)
934 mode
|= SDHCI_TRNS_DMA
;
936 sdhci_writew(host
, mode
, SDHCI_TRANSFER_MODE
);
939 static void sdhci_finish_data(struct sdhci_host
*host
)
941 struct mmc_data
*data
;
948 if (host
->flags
& SDHCI_REQ_USE_DMA
) {
949 if (host
->flags
& SDHCI_USE_ADMA
)
950 sdhci_adma_table_post(host
, data
);
952 if (!data
->host_cookie
)
953 dma_unmap_sg(mmc_dev(host
->mmc
),
954 data
->sg
, data
->sg_len
,
955 (data
->flags
& MMC_DATA_READ
) ?
956 DMA_FROM_DEVICE
: DMA_TO_DEVICE
);
961 * The specification states that the block count register must
962 * be updated, but it does not specify at what point in the
963 * data flow. That makes the register entirely useless to read
964 * back so we have to assume that nothing made it to the card
965 * in the event of an error.
968 data
->bytes_xfered
= 0;
970 data
->bytes_xfered
= data
->blksz
* data
->blocks
;
973 * Need to send CMD12 if -
974 * a) open-ended multiblock transfer (no CMD23)
975 * b) error in multiblock transfer
982 * The controller needs a reset of internal state machines
983 * upon error conditions.
986 sdhci_do_reset(host
, SDHCI_RESET_CMD
);
987 sdhci_do_reset(host
, SDHCI_RESET_DATA
);
990 sdhci_send_command(host
, data
->stop
);
992 tasklet_schedule(&host
->finish_tasklet
);
995 void sdhci_send_command(struct sdhci_host
*host
, struct mmc_command
*cmd
)
999 unsigned long timeout
;
1003 /* Wait max 10 ms */
1006 mask
= SDHCI_CMD_INHIBIT
;
1007 if ((cmd
->data
!= NULL
) || (cmd
->flags
& MMC_RSP_BUSY
))
1008 mask
|= SDHCI_DATA_INHIBIT
;
1010 /* We shouldn't wait for data inihibit for stop commands, even
1011 though they might use busy signaling */
1012 if (host
->mrq
->data
&& (cmd
== host
->mrq
->data
->stop
))
1013 mask
&= ~SDHCI_DATA_INHIBIT
;
1015 while (sdhci_readl(host
, SDHCI_PRESENT_STATE
) & mask
) {
1017 pr_err("%s: Controller never released "
1018 "inhibit bit(s).\n", mmc_hostname(host
->mmc
));
1019 sdhci_dumpregs(host
);
1021 tasklet_schedule(&host
->finish_tasklet
);
1029 if (!cmd
->data
&& cmd
->busy_timeout
> 9000)
1030 timeout
+= DIV_ROUND_UP(cmd
->busy_timeout
, 1000) * HZ
+ HZ
;
1033 mod_timer(&host
->timer
, timeout
);
1036 host
->busy_handle
= 0;
1038 sdhci_prepare_data(host
, cmd
);
1040 sdhci_writel(host
, cmd
->arg
, SDHCI_ARGUMENT
);
1042 sdhci_set_transfer_mode(host
, cmd
);
1044 if ((cmd
->flags
& MMC_RSP_136
) && (cmd
->flags
& MMC_RSP_BUSY
)) {
1045 pr_err("%s: Unsupported response type!\n",
1046 mmc_hostname(host
->mmc
));
1047 cmd
->error
= -EINVAL
;
1048 tasklet_schedule(&host
->finish_tasklet
);
1052 if (!(cmd
->flags
& MMC_RSP_PRESENT
))
1053 flags
= SDHCI_CMD_RESP_NONE
;
1054 else if (cmd
->flags
& MMC_RSP_136
)
1055 flags
= SDHCI_CMD_RESP_LONG
;
1056 else if (cmd
->flags
& MMC_RSP_BUSY
)
1057 flags
= SDHCI_CMD_RESP_SHORT_BUSY
;
1059 flags
= SDHCI_CMD_RESP_SHORT
;
1061 if (cmd
->flags
& MMC_RSP_CRC
)
1062 flags
|= SDHCI_CMD_CRC
;
1063 if (cmd
->flags
& MMC_RSP_OPCODE
)
1064 flags
|= SDHCI_CMD_INDEX
;
1066 /* CMD19 is special in that the Data Present Select should be set */
1067 if (cmd
->data
|| cmd
->opcode
== MMC_SEND_TUNING_BLOCK
||
1068 cmd
->opcode
== MMC_SEND_TUNING_BLOCK_HS200
)
1069 flags
|= SDHCI_CMD_DATA
;
1071 sdhci_writew(host
, SDHCI_MAKE_CMD(cmd
->opcode
, flags
), SDHCI_COMMAND
);
1073 EXPORT_SYMBOL_GPL(sdhci_send_command
);
1075 static void sdhci_finish_command(struct sdhci_host
*host
)
1079 BUG_ON(host
->cmd
== NULL
);
1081 if (host
->cmd
->flags
& MMC_RSP_PRESENT
) {
1082 if (host
->cmd
->flags
& MMC_RSP_136
) {
1083 /* CRC is stripped so we need to do some shifting. */
1084 for (i
= 0;i
< 4;i
++) {
1085 host
->cmd
->resp
[i
] = sdhci_readl(host
,
1086 SDHCI_RESPONSE
+ (3-i
)*4) << 8;
1088 host
->cmd
->resp
[i
] |=
1090 SDHCI_RESPONSE
+ (3-i
)*4-1);
1093 host
->cmd
->resp
[0] = sdhci_readl(host
, SDHCI_RESPONSE
);
1097 host
->cmd
->error
= 0;
1099 /* Finished CMD23, now send actual command. */
1100 if (host
->cmd
== host
->mrq
->sbc
) {
1102 sdhci_send_command(host
, host
->mrq
->cmd
);
1105 /* Processed actual command. */
1106 if (host
->data
&& host
->data_early
)
1107 sdhci_finish_data(host
);
1109 if (!host
->cmd
->data
)
1110 tasklet_schedule(&host
->finish_tasklet
);
1116 static u16
sdhci_get_preset_value(struct sdhci_host
*host
)
1120 switch (host
->timing
) {
1121 case MMC_TIMING_UHS_SDR12
:
1122 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_SDR12
);
1124 case MMC_TIMING_UHS_SDR25
:
1125 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_SDR25
);
1127 case MMC_TIMING_UHS_SDR50
:
1128 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_SDR50
);
1130 case MMC_TIMING_UHS_SDR104
:
1131 case MMC_TIMING_MMC_HS200
:
1132 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_SDR104
);
1134 case MMC_TIMING_UHS_DDR50
:
1135 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_DDR50
);
1137 case MMC_TIMING_MMC_HS400
:
1138 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_HS400
);
1141 pr_warn("%s: Invalid UHS-I mode selected\n",
1142 mmc_hostname(host
->mmc
));
1143 preset
= sdhci_readw(host
, SDHCI_PRESET_FOR_SDR12
);
1149 void sdhci_set_clock(struct sdhci_host
*host
, unsigned int clock
)
1151 int div
= 0; /* Initialized for compiler warning */
1152 int real_div
= div
, clk_mul
= 1;
1154 unsigned long timeout
;
1156 host
->mmc
->actual_clock
= 0;
1158 sdhci_writew(host
, 0, SDHCI_CLOCK_CONTROL
);
1163 if (host
->version
>= SDHCI_SPEC_300
) {
1164 if (host
->preset_enabled
) {
1167 clk
= sdhci_readw(host
, SDHCI_CLOCK_CONTROL
);
1168 pre_val
= sdhci_get_preset_value(host
);
1169 div
= (pre_val
& SDHCI_PRESET_SDCLK_FREQ_MASK
)
1170 >> SDHCI_PRESET_SDCLK_FREQ_SHIFT
;
1171 if (host
->clk_mul
&&
1172 (pre_val
& SDHCI_PRESET_CLKGEN_SEL_MASK
)) {
1173 clk
= SDHCI_PROG_CLOCK_MODE
;
1175 clk_mul
= host
->clk_mul
;
1177 real_div
= max_t(int, 1, div
<< 1);
1183 * Check if the Host Controller supports Programmable Clock
1186 if (host
->clk_mul
) {
1187 for (div
= 1; div
<= 1024; div
++) {
1188 if ((host
->max_clk
* host
->clk_mul
/ div
)
1193 * Set Programmable Clock Mode in the Clock
1196 clk
= SDHCI_PROG_CLOCK_MODE
;
1198 clk_mul
= host
->clk_mul
;
1201 /* Version 3.00 divisors must be a multiple of 2. */
1202 if (host
->max_clk
<= clock
)
1205 for (div
= 2; div
< SDHCI_MAX_DIV_SPEC_300
;
1207 if ((host
->max_clk
/ div
) <= clock
)
1215 /* Version 2.00 divisors must be a power of 2. */
1216 for (div
= 1; div
< SDHCI_MAX_DIV_SPEC_200
; div
*= 2) {
1217 if ((host
->max_clk
/ div
) <= clock
)
1226 host
->mmc
->actual_clock
= (host
->max_clk
* clk_mul
) / real_div
;
1227 clk
|= (div
& SDHCI_DIV_MASK
) << SDHCI_DIVIDER_SHIFT
;
1228 clk
|= ((div
& SDHCI_DIV_HI_MASK
) >> SDHCI_DIV_MASK_LEN
)
1229 << SDHCI_DIVIDER_HI_SHIFT
;
1230 clk
|= SDHCI_CLOCK_INT_EN
;
1231 sdhci_writew(host
, clk
, SDHCI_CLOCK_CONTROL
);
1233 /* Wait max 20 ms */
1235 while (!((clk
= sdhci_readw(host
, SDHCI_CLOCK_CONTROL
))
1236 & SDHCI_CLOCK_INT_STABLE
)) {
1238 pr_err("%s: Internal clock never "
1239 "stabilised.\n", mmc_hostname(host
->mmc
));
1240 sdhci_dumpregs(host
);
1247 clk
|= SDHCI_CLOCK_CARD_EN
;
1248 sdhci_writew(host
, clk
, SDHCI_CLOCK_CONTROL
);
1250 EXPORT_SYMBOL_GPL(sdhci_set_clock
);
1252 static void sdhci_set_power(struct sdhci_host
*host
, unsigned char mode
,
1255 struct mmc_host
*mmc
= host
->mmc
;
1258 if (!IS_ERR(mmc
->supply
.vmmc
)) {
1259 spin_unlock_irq(&host
->lock
);
1260 mmc_regulator_set_ocr(mmc
, mmc
->supply
.vmmc
, vdd
);
1261 spin_lock_irq(&host
->lock
);
1263 if (mode
!= MMC_POWER_OFF
)
1264 sdhci_writeb(host
, SDHCI_POWER_ON
, SDHCI_POWER_CONTROL
);
1266 sdhci_writeb(host
, 0, SDHCI_POWER_CONTROL
);
1271 if (mode
!= MMC_POWER_OFF
) {
1273 case MMC_VDD_165_195
:
1274 pwr
= SDHCI_POWER_180
;
1278 pwr
= SDHCI_POWER_300
;
1282 pwr
= SDHCI_POWER_330
;
1289 if (host
->pwr
== pwr
)
1295 sdhci_writeb(host
, 0, SDHCI_POWER_CONTROL
);
1296 if (host
->quirks2
& SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON
)
1297 sdhci_runtime_pm_bus_off(host
);
1301 * Spec says that we should clear the power reg before setting
1302 * a new value. Some controllers don't seem to like this though.
1304 if (!(host
->quirks
& SDHCI_QUIRK_SINGLE_POWER_WRITE
))
1305 sdhci_writeb(host
, 0, SDHCI_POWER_CONTROL
);
1308 * At least the Marvell CaFe chip gets confused if we set the
1309 * voltage and set turn on power at the same time, so set the
1312 if (host
->quirks
& SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER
)
1313 sdhci_writeb(host
, pwr
, SDHCI_POWER_CONTROL
);
1315 pwr
|= SDHCI_POWER_ON
;
1317 sdhci_writeb(host
, pwr
, SDHCI_POWER_CONTROL
);
1319 if (host
->quirks2
& SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON
)
1320 sdhci_runtime_pm_bus_on(host
);
1323 * Some controllers need an extra 10ms delay of 10ms before
1324 * they can apply clock after applying power
1326 if (host
->quirks
& SDHCI_QUIRK_DELAY_AFTER_POWER
)
1331 /*****************************************************************************\
1335 \*****************************************************************************/
1337 static void sdhci_request(struct mmc_host
*mmc
, struct mmc_request
*mrq
)
1339 struct sdhci_host
*host
;
1341 unsigned long flags
;
1343 host
= mmc_priv(mmc
);
1345 sdhci_runtime_pm_get(host
);
1347 /* Firstly check card presence */
1348 present
= sdhci_do_get_cd(host
);
1350 spin_lock_irqsave(&host
->lock
, flags
);
1352 WARN_ON(host
->mrq
!= NULL
);
1354 #ifndef SDHCI_USE_LEDS_CLASS
1355 sdhci_activate_led(host
);
1359 * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED
1360 * requests if Auto-CMD12 is enabled.
1362 if (!mrq
->sbc
&& (host
->flags
& SDHCI_AUTO_CMD12
)) {
1364 mrq
->data
->stop
= NULL
;
1371 if (!present
|| host
->flags
& SDHCI_DEVICE_DEAD
) {
1372 host
->mrq
->cmd
->error
= -ENOMEDIUM
;
1373 tasklet_schedule(&host
->finish_tasklet
);
1375 if (mrq
->sbc
&& !(host
->flags
& SDHCI_AUTO_CMD23
))
1376 sdhci_send_command(host
, mrq
->sbc
);
1378 sdhci_send_command(host
, mrq
->cmd
);
1382 spin_unlock_irqrestore(&host
->lock
, flags
);
1385 void sdhci_set_bus_width(struct sdhci_host
*host
, int width
)
1389 ctrl
= sdhci_readb(host
, SDHCI_HOST_CONTROL
);
1390 if (width
== MMC_BUS_WIDTH_8
) {
1391 ctrl
&= ~SDHCI_CTRL_4BITBUS
;
1392 if (host
->version
>= SDHCI_SPEC_300
)
1393 ctrl
|= SDHCI_CTRL_8BITBUS
;
1395 if (host
->version
>= SDHCI_SPEC_300
)
1396 ctrl
&= ~SDHCI_CTRL_8BITBUS
;
1397 if (width
== MMC_BUS_WIDTH_4
)
1398 ctrl
|= SDHCI_CTRL_4BITBUS
;
1400 ctrl
&= ~SDHCI_CTRL_4BITBUS
;
1402 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
1404 EXPORT_SYMBOL_GPL(sdhci_set_bus_width
);
1406 void sdhci_set_uhs_signaling(struct sdhci_host
*host
, unsigned timing
)
1410 ctrl_2
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1411 /* Select Bus Speed Mode for host */
1412 ctrl_2
&= ~SDHCI_CTRL_UHS_MASK
;
1413 if ((timing
== MMC_TIMING_MMC_HS200
) ||
1414 (timing
== MMC_TIMING_UHS_SDR104
))
1415 ctrl_2
|= SDHCI_CTRL_UHS_SDR104
;
1416 else if (timing
== MMC_TIMING_UHS_SDR12
)
1417 ctrl_2
|= SDHCI_CTRL_UHS_SDR12
;
1418 else if (timing
== MMC_TIMING_UHS_SDR25
)
1419 ctrl_2
|= SDHCI_CTRL_UHS_SDR25
;
1420 else if (timing
== MMC_TIMING_UHS_SDR50
)
1421 ctrl_2
|= SDHCI_CTRL_UHS_SDR50
;
1422 else if ((timing
== MMC_TIMING_UHS_DDR50
) ||
1423 (timing
== MMC_TIMING_MMC_DDR52
))
1424 ctrl_2
|= SDHCI_CTRL_UHS_DDR50
;
1425 else if (timing
== MMC_TIMING_MMC_HS400
)
1426 ctrl_2
|= SDHCI_CTRL_HS400
; /* Non-standard */
1427 sdhci_writew(host
, ctrl_2
, SDHCI_HOST_CONTROL2
);
1429 EXPORT_SYMBOL_GPL(sdhci_set_uhs_signaling
);
1431 static void sdhci_do_set_ios(struct sdhci_host
*host
, struct mmc_ios
*ios
)
1433 unsigned long flags
;
1435 struct mmc_host
*mmc
= host
->mmc
;
1437 spin_lock_irqsave(&host
->lock
, flags
);
1439 if (host
->flags
& SDHCI_DEVICE_DEAD
) {
1440 spin_unlock_irqrestore(&host
->lock
, flags
);
1441 if (!IS_ERR(mmc
->supply
.vmmc
) &&
1442 ios
->power_mode
== MMC_POWER_OFF
)
1443 mmc_regulator_set_ocr(mmc
, mmc
->supply
.vmmc
, 0);
1448 * Reset the chip on each power off.
1449 * Should clear out any weird states.
1451 if (ios
->power_mode
== MMC_POWER_OFF
) {
1452 sdhci_writel(host
, 0, SDHCI_SIGNAL_ENABLE
);
1456 if (host
->version
>= SDHCI_SPEC_300
&&
1457 (ios
->power_mode
== MMC_POWER_UP
) &&
1458 !(host
->quirks2
& SDHCI_QUIRK2_PRESET_VALUE_BROKEN
))
1459 sdhci_enable_preset_value(host
, false);
1461 if (!ios
->clock
|| ios
->clock
!= host
->clock
) {
1462 host
->ops
->set_clock(host
, ios
->clock
);
1463 host
->clock
= ios
->clock
;
1465 if (host
->quirks
& SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
&&
1467 host
->timeout_clk
= host
->mmc
->actual_clock
?
1468 host
->mmc
->actual_clock
/ 1000 :
1470 host
->mmc
->max_busy_timeout
=
1471 host
->ops
->get_max_timeout_count
?
1472 host
->ops
->get_max_timeout_count(host
) :
1474 host
->mmc
->max_busy_timeout
/= host
->timeout_clk
;
1478 sdhci_set_power(host
, ios
->power_mode
, ios
->vdd
);
1480 if (host
->ops
->platform_send_init_74_clocks
)
1481 host
->ops
->platform_send_init_74_clocks(host
, ios
->power_mode
);
1483 host
->ops
->set_bus_width(host
, ios
->bus_width
);
1485 ctrl
= sdhci_readb(host
, SDHCI_HOST_CONTROL
);
1487 if ((ios
->timing
== MMC_TIMING_SD_HS
||
1488 ios
->timing
== MMC_TIMING_MMC_HS
)
1489 && !(host
->quirks
& SDHCI_QUIRK_NO_HISPD_BIT
))
1490 ctrl
|= SDHCI_CTRL_HISPD
;
1492 ctrl
&= ~SDHCI_CTRL_HISPD
;
1494 if (host
->version
>= SDHCI_SPEC_300
) {
1497 /* In case of UHS-I modes, set High Speed Enable */
1498 if ((ios
->timing
== MMC_TIMING_MMC_HS400
) ||
1499 (ios
->timing
== MMC_TIMING_MMC_HS200
) ||
1500 (ios
->timing
== MMC_TIMING_MMC_DDR52
) ||
1501 (ios
->timing
== MMC_TIMING_UHS_SDR50
) ||
1502 (ios
->timing
== MMC_TIMING_UHS_SDR104
) ||
1503 (ios
->timing
== MMC_TIMING_UHS_DDR50
) ||
1504 (ios
->timing
== MMC_TIMING_UHS_SDR25
))
1505 ctrl
|= SDHCI_CTRL_HISPD
;
1507 if (!host
->preset_enabled
) {
1508 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
1510 * We only need to set Driver Strength if the
1511 * preset value enable is not set.
1513 ctrl_2
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1514 ctrl_2
&= ~SDHCI_CTRL_DRV_TYPE_MASK
;
1515 if (ios
->drv_type
== MMC_SET_DRIVER_TYPE_A
)
1516 ctrl_2
|= SDHCI_CTRL_DRV_TYPE_A
;
1517 else if (ios
->drv_type
== MMC_SET_DRIVER_TYPE_B
)
1518 ctrl_2
|= SDHCI_CTRL_DRV_TYPE_B
;
1519 else if (ios
->drv_type
== MMC_SET_DRIVER_TYPE_C
)
1520 ctrl_2
|= SDHCI_CTRL_DRV_TYPE_C
;
1521 else if (ios
->drv_type
== MMC_SET_DRIVER_TYPE_D
)
1522 ctrl_2
|= SDHCI_CTRL_DRV_TYPE_D
;
1524 pr_warn("%s: invalid driver type, default to "
1525 "driver type B\n", mmc_hostname(mmc
));
1526 ctrl_2
|= SDHCI_CTRL_DRV_TYPE_B
;
1529 sdhci_writew(host
, ctrl_2
, SDHCI_HOST_CONTROL2
);
1532 * According to SDHC Spec v3.00, if the Preset Value
1533 * Enable in the Host Control 2 register is set, we
1534 * need to reset SD Clock Enable before changing High
1535 * Speed Enable to avoid generating clock gliches.
1538 /* Reset SD Clock Enable */
1539 clk
= sdhci_readw(host
, SDHCI_CLOCK_CONTROL
);
1540 clk
&= ~SDHCI_CLOCK_CARD_EN
;
1541 sdhci_writew(host
, clk
, SDHCI_CLOCK_CONTROL
);
1543 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
1545 /* Re-enable SD Clock */
1546 host
->ops
->set_clock(host
, host
->clock
);
1549 /* Reset SD Clock Enable */
1550 clk
= sdhci_readw(host
, SDHCI_CLOCK_CONTROL
);
1551 clk
&= ~SDHCI_CLOCK_CARD_EN
;
1552 sdhci_writew(host
, clk
, SDHCI_CLOCK_CONTROL
);
1554 host
->ops
->set_uhs_signaling(host
, ios
->timing
);
1555 host
->timing
= ios
->timing
;
1557 if (!(host
->quirks2
& SDHCI_QUIRK2_PRESET_VALUE_BROKEN
) &&
1558 ((ios
->timing
== MMC_TIMING_UHS_SDR12
) ||
1559 (ios
->timing
== MMC_TIMING_UHS_SDR25
) ||
1560 (ios
->timing
== MMC_TIMING_UHS_SDR50
) ||
1561 (ios
->timing
== MMC_TIMING_UHS_SDR104
) ||
1562 (ios
->timing
== MMC_TIMING_UHS_DDR50
))) {
1565 sdhci_enable_preset_value(host
, true);
1566 preset
= sdhci_get_preset_value(host
);
1567 ios
->drv_type
= (preset
& SDHCI_PRESET_DRV_MASK
)
1568 >> SDHCI_PRESET_DRV_SHIFT
;
1571 /* Re-enable SD Clock */
1572 host
->ops
->set_clock(host
, host
->clock
);
1574 sdhci_writeb(host
, ctrl
, SDHCI_HOST_CONTROL
);
1577 * Some (ENE) controllers go apeshit on some ios operation,
1578 * signalling timeout and CRC errors even on CMD0. Resetting
1579 * it on each ios seems to solve the problem.
1581 if (host
->quirks
& SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS
)
1582 sdhci_do_reset(host
, SDHCI_RESET_CMD
| SDHCI_RESET_DATA
);
1585 spin_unlock_irqrestore(&host
->lock
, flags
);
1588 static void sdhci_set_ios(struct mmc_host
*mmc
, struct mmc_ios
*ios
)
1590 struct sdhci_host
*host
= mmc_priv(mmc
);
1592 sdhci_runtime_pm_get(host
);
1593 sdhci_do_set_ios(host
, ios
);
1594 sdhci_runtime_pm_put(host
);
1597 static int sdhci_do_get_cd(struct sdhci_host
*host
)
1599 int gpio_cd
= mmc_gpio_get_cd(host
->mmc
);
1601 if (host
->flags
& SDHCI_DEVICE_DEAD
)
1604 /* If polling/nonremovable, assume that the card is always present. */
1605 if ((host
->quirks
& SDHCI_QUIRK_BROKEN_CARD_DETECTION
) ||
1606 (host
->mmc
->caps
& MMC_CAP_NONREMOVABLE
))
1609 /* Try slot gpio detect */
1610 if (!IS_ERR_VALUE(gpio_cd
))
1613 /* Host native card detect */
1614 return !!(sdhci_readl(host
, SDHCI_PRESENT_STATE
) & SDHCI_CARD_PRESENT
);
1617 static int sdhci_get_cd(struct mmc_host
*mmc
)
1619 struct sdhci_host
*host
= mmc_priv(mmc
);
1622 sdhci_runtime_pm_get(host
);
1623 ret
= sdhci_do_get_cd(host
);
1624 sdhci_runtime_pm_put(host
);
1628 static int sdhci_check_ro(struct sdhci_host
*host
)
1630 unsigned long flags
;
1633 spin_lock_irqsave(&host
->lock
, flags
);
1635 if (host
->flags
& SDHCI_DEVICE_DEAD
)
1637 else if (host
->ops
->get_ro
)
1638 is_readonly
= host
->ops
->get_ro(host
);
1640 is_readonly
= !(sdhci_readl(host
, SDHCI_PRESENT_STATE
)
1641 & SDHCI_WRITE_PROTECT
);
1643 spin_unlock_irqrestore(&host
->lock
, flags
);
1645 /* This quirk needs to be replaced by a callback-function later */
1646 return host
->quirks
& SDHCI_QUIRK_INVERTED_WRITE_PROTECT
?
1647 !is_readonly
: is_readonly
;
1650 #define SAMPLE_COUNT 5
1652 static int sdhci_do_get_ro(struct sdhci_host
*host
)
1656 if (!(host
->quirks
& SDHCI_QUIRK_UNSTABLE_RO_DETECT
))
1657 return sdhci_check_ro(host
);
1660 for (i
= 0; i
< SAMPLE_COUNT
; i
++) {
1661 if (sdhci_check_ro(host
)) {
1662 if (++ro_count
> SAMPLE_COUNT
/ 2)
1670 static void sdhci_hw_reset(struct mmc_host
*mmc
)
1672 struct sdhci_host
*host
= mmc_priv(mmc
);
1674 if (host
->ops
&& host
->ops
->hw_reset
)
1675 host
->ops
->hw_reset(host
);
1678 static int sdhci_get_ro(struct mmc_host
*mmc
)
1680 struct sdhci_host
*host
= mmc_priv(mmc
);
1683 sdhci_runtime_pm_get(host
);
1684 ret
= sdhci_do_get_ro(host
);
1685 sdhci_runtime_pm_put(host
);
1689 static void sdhci_enable_sdio_irq_nolock(struct sdhci_host
*host
, int enable
)
1691 if (!(host
->flags
& SDHCI_DEVICE_DEAD
)) {
1693 host
->ier
|= SDHCI_INT_CARD_INT
;
1695 host
->ier
&= ~SDHCI_INT_CARD_INT
;
1697 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
1698 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
1703 static void sdhci_enable_sdio_irq(struct mmc_host
*mmc
, int enable
)
1705 struct sdhci_host
*host
= mmc_priv(mmc
);
1706 unsigned long flags
;
1708 sdhci_runtime_pm_get(host
);
1710 spin_lock_irqsave(&host
->lock
, flags
);
1712 host
->flags
|= SDHCI_SDIO_IRQ_ENABLED
;
1714 host
->flags
&= ~SDHCI_SDIO_IRQ_ENABLED
;
1716 sdhci_enable_sdio_irq_nolock(host
, enable
);
1717 spin_unlock_irqrestore(&host
->lock
, flags
);
1719 sdhci_runtime_pm_put(host
);
1722 static int sdhci_do_start_signal_voltage_switch(struct sdhci_host
*host
,
1723 struct mmc_ios
*ios
)
1725 struct mmc_host
*mmc
= host
->mmc
;
1730 * Signal Voltage Switching is only applicable for Host Controllers
1733 if (host
->version
< SDHCI_SPEC_300
)
1736 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1738 switch (ios
->signal_voltage
) {
1739 case MMC_SIGNAL_VOLTAGE_330
:
1740 /* Set 1.8V Signal Enable in the Host Control2 register to 0 */
1741 ctrl
&= ~SDHCI_CTRL_VDD_180
;
1742 sdhci_writew(host
, ctrl
, SDHCI_HOST_CONTROL2
);
1744 if (!IS_ERR(mmc
->supply
.vqmmc
)) {
1745 ret
= regulator_set_voltage(mmc
->supply
.vqmmc
, 2700000,
1748 pr_warn("%s: Switching to 3.3V signalling voltage failed\n",
1754 usleep_range(5000, 5500);
1756 /* 3.3V regulator output should be stable within 5 ms */
1757 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1758 if (!(ctrl
& SDHCI_CTRL_VDD_180
))
1761 pr_warn("%s: 3.3V regulator output did not became stable\n",
1765 case MMC_SIGNAL_VOLTAGE_180
:
1766 if (!IS_ERR(mmc
->supply
.vqmmc
)) {
1767 ret
= regulator_set_voltage(mmc
->supply
.vqmmc
,
1770 pr_warn("%s: Switching to 1.8V signalling voltage failed\n",
1777 * Enable 1.8V Signal Enable in the Host Control2
1780 ctrl
|= SDHCI_CTRL_VDD_180
;
1781 sdhci_writew(host
, ctrl
, SDHCI_HOST_CONTROL2
);
1783 /* Some controller need to do more when switching */
1784 if (host
->ops
->voltage_switch
)
1785 host
->ops
->voltage_switch(host
);
1787 /* 1.8V regulator output should be stable within 5 ms */
1788 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1789 if (ctrl
& SDHCI_CTRL_VDD_180
)
1792 pr_warn("%s: 1.8V regulator output did not became stable\n",
1796 case MMC_SIGNAL_VOLTAGE_120
:
1797 if (!IS_ERR(mmc
->supply
.vqmmc
)) {
1798 ret
= regulator_set_voltage(mmc
->supply
.vqmmc
, 1100000,
1801 pr_warn("%s: Switching to 1.2V signalling voltage failed\n",
1808 /* No signal voltage switch required */
1813 static int sdhci_start_signal_voltage_switch(struct mmc_host
*mmc
,
1814 struct mmc_ios
*ios
)
1816 struct sdhci_host
*host
= mmc_priv(mmc
);
1819 if (host
->version
< SDHCI_SPEC_300
)
1821 sdhci_runtime_pm_get(host
);
1822 err
= sdhci_do_start_signal_voltage_switch(host
, ios
);
1823 sdhci_runtime_pm_put(host
);
1827 static int sdhci_card_busy(struct mmc_host
*mmc
)
1829 struct sdhci_host
*host
= mmc_priv(mmc
);
1832 sdhci_runtime_pm_get(host
);
1833 /* Check whether DAT[3:0] is 0000 */
1834 present_state
= sdhci_readl(host
, SDHCI_PRESENT_STATE
);
1835 sdhci_runtime_pm_put(host
);
1837 return !(present_state
& SDHCI_DATA_LVL_MASK
);
1840 static int sdhci_prepare_hs400_tuning(struct mmc_host
*mmc
, struct mmc_ios
*ios
)
1842 struct sdhci_host
*host
= mmc_priv(mmc
);
1843 unsigned long flags
;
1845 spin_lock_irqsave(&host
->lock
, flags
);
1846 host
->flags
|= SDHCI_HS400_TUNING
;
1847 spin_unlock_irqrestore(&host
->lock
, flags
);
1852 static int sdhci_execute_tuning(struct mmc_host
*mmc
, u32 opcode
)
1854 struct sdhci_host
*host
= mmc_priv(mmc
);
1856 int tuning_loop_counter
= MAX_TUNING_LOOP
;
1858 unsigned long flags
;
1859 unsigned int tuning_count
= 0;
1862 sdhci_runtime_pm_get(host
);
1863 spin_lock_irqsave(&host
->lock
, flags
);
1865 hs400_tuning
= host
->flags
& SDHCI_HS400_TUNING
;
1866 host
->flags
&= ~SDHCI_HS400_TUNING
;
1868 if (host
->tuning_mode
== SDHCI_TUNING_MODE_1
)
1869 tuning_count
= host
->tuning_count
;
1872 * The Host Controller needs tuning only in case of SDR104 mode
1873 * and for SDR50 mode when Use Tuning for SDR50 is set in the
1874 * Capabilities register.
1875 * If the Host Controller supports the HS200 mode then the
1876 * tuning function has to be executed.
1878 switch (host
->timing
) {
1879 /* HS400 tuning is done in HS200 mode */
1880 case MMC_TIMING_MMC_HS400
:
1884 case MMC_TIMING_MMC_HS200
:
1886 * Periodic re-tuning for HS400 is not expected to be needed, so
1893 case MMC_TIMING_UHS_SDR104
:
1896 case MMC_TIMING_UHS_SDR50
:
1897 if (host
->flags
& SDHCI_SDR50_NEEDS_TUNING
||
1898 host
->flags
& SDHCI_SDR104_NEEDS_TUNING
)
1906 if (host
->ops
->platform_execute_tuning
) {
1907 spin_unlock_irqrestore(&host
->lock
, flags
);
1908 err
= host
->ops
->platform_execute_tuning(host
, opcode
);
1909 sdhci_runtime_pm_put(host
);
1913 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1914 ctrl
|= SDHCI_CTRL_EXEC_TUNING
;
1915 if (host
->quirks2
& SDHCI_QUIRK2_TUNING_WORK_AROUND
)
1916 ctrl
|= SDHCI_CTRL_TUNED_CLK
;
1917 sdhci_writew(host
, ctrl
, SDHCI_HOST_CONTROL2
);
1920 * As per the Host Controller spec v3.00, tuning command
1921 * generates Buffer Read Ready interrupt, so enable that.
1923 * Note: The spec clearly says that when tuning sequence
1924 * is being performed, the controller does not generate
1925 * interrupts other than Buffer Read Ready interrupt. But
1926 * to make sure we don't hit a controller bug, we _only_
1927 * enable Buffer Read Ready interrupt here.
1929 sdhci_writel(host
, SDHCI_INT_DATA_AVAIL
, SDHCI_INT_ENABLE
);
1930 sdhci_writel(host
, SDHCI_INT_DATA_AVAIL
, SDHCI_SIGNAL_ENABLE
);
1933 * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number
1934 * of loops reaches 40 times or a timeout of 150ms occurs.
1937 struct mmc_command cmd
= {0};
1938 struct mmc_request mrq
= {NULL
};
1940 cmd
.opcode
= opcode
;
1942 cmd
.flags
= MMC_RSP_R1
| MMC_CMD_ADTC
;
1947 if (tuning_loop_counter
-- == 0)
1954 * In response to CMD19, the card sends 64 bytes of tuning
1955 * block to the Host Controller. So we set the block size
1958 if (cmd
.opcode
== MMC_SEND_TUNING_BLOCK_HS200
) {
1959 if (mmc
->ios
.bus_width
== MMC_BUS_WIDTH_8
)
1960 sdhci_writew(host
, SDHCI_MAKE_BLKSZ(7, 128),
1962 else if (mmc
->ios
.bus_width
== MMC_BUS_WIDTH_4
)
1963 sdhci_writew(host
, SDHCI_MAKE_BLKSZ(7, 64),
1966 sdhci_writew(host
, SDHCI_MAKE_BLKSZ(7, 64),
1971 * The tuning block is sent by the card to the host controller.
1972 * So we set the TRNS_READ bit in the Transfer Mode register.
1973 * This also takes care of setting DMA Enable and Multi Block
1974 * Select in the same register to 0.
1976 sdhci_writew(host
, SDHCI_TRNS_READ
, SDHCI_TRANSFER_MODE
);
1978 sdhci_send_command(host
, &cmd
);
1983 spin_unlock_irqrestore(&host
->lock
, flags
);
1984 /* Wait for Buffer Read Ready interrupt */
1985 wait_event_interruptible_timeout(host
->buf_ready_int
,
1986 (host
->tuning_done
== 1),
1987 msecs_to_jiffies(50));
1988 spin_lock_irqsave(&host
->lock
, flags
);
1990 if (!host
->tuning_done
) {
1991 pr_info(DRIVER_NAME
": Timeout waiting for "
1992 "Buffer Read Ready interrupt during tuning "
1993 "procedure, falling back to fixed sampling "
1995 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
1996 ctrl
&= ~SDHCI_CTRL_TUNED_CLK
;
1997 ctrl
&= ~SDHCI_CTRL_EXEC_TUNING
;
1998 sdhci_writew(host
, ctrl
, SDHCI_HOST_CONTROL2
);
2004 host
->tuning_done
= 0;
2006 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
2008 /* eMMC spec does not require a delay between tuning cycles */
2009 if (opcode
== MMC_SEND_TUNING_BLOCK
)
2011 } while (ctrl
& SDHCI_CTRL_EXEC_TUNING
);
2014 * The Host Driver has exhausted the maximum number of loops allowed,
2015 * so use fixed sampling frequency.
2017 if (tuning_loop_counter
< 0) {
2018 ctrl
&= ~SDHCI_CTRL_TUNED_CLK
;
2019 sdhci_writew(host
, ctrl
, SDHCI_HOST_CONTROL2
);
2021 if (!(ctrl
& SDHCI_CTRL_TUNED_CLK
)) {
2022 pr_info(DRIVER_NAME
": Tuning procedure"
2023 " failed, falling back to fixed sampling"
2031 * In case tuning fails, host controllers which support
2032 * re-tuning can try tuning again at a later time, when the
2033 * re-tuning timer expires. So for these controllers, we
2034 * return 0. Since there might be other controllers who do not
2035 * have this capability, we return error for them.
2040 host
->mmc
->retune_period
= err
? 0 : tuning_count
;
2042 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
2043 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
2045 spin_unlock_irqrestore(&host
->lock
, flags
);
2046 sdhci_runtime_pm_put(host
);
2051 static int sdhci_select_drive_strength(struct mmc_card
*card
,
2052 unsigned int max_dtr
, int host_drv
,
2053 int card_drv
, int *drv_type
)
2055 struct sdhci_host
*host
= mmc_priv(card
->host
);
2057 if (!host
->ops
->select_drive_strength
)
2060 return host
->ops
->select_drive_strength(host
, card
, max_dtr
, host_drv
,
2061 card_drv
, drv_type
);
2064 static void sdhci_enable_preset_value(struct sdhci_host
*host
, bool enable
)
2066 /* Host Controller v3.00 defines preset value registers */
2067 if (host
->version
< SDHCI_SPEC_300
)
2071 * We only enable or disable Preset Value if they are not already
2072 * enabled or disabled respectively. Otherwise, we bail out.
2074 if (host
->preset_enabled
!= enable
) {
2075 u16 ctrl
= sdhci_readw(host
, SDHCI_HOST_CONTROL2
);
2078 ctrl
|= SDHCI_CTRL_PRESET_VAL_ENABLE
;
2080 ctrl
&= ~SDHCI_CTRL_PRESET_VAL_ENABLE
;
2082 sdhci_writew(host
, ctrl
, SDHCI_HOST_CONTROL2
);
2085 host
->flags
|= SDHCI_PV_ENABLED
;
2087 host
->flags
&= ~SDHCI_PV_ENABLED
;
2089 host
->preset_enabled
= enable
;
2093 static void sdhci_post_req(struct mmc_host
*mmc
, struct mmc_request
*mrq
,
2096 struct sdhci_host
*host
= mmc_priv(mmc
);
2097 struct mmc_data
*data
= mrq
->data
;
2099 if (host
->flags
& SDHCI_REQ_USE_DMA
) {
2100 if (data
->host_cookie
)
2101 dma_unmap_sg(mmc_dev(host
->mmc
), data
->sg
, data
->sg_len
,
2102 data
->flags
& MMC_DATA_WRITE
?
2103 DMA_TO_DEVICE
: DMA_FROM_DEVICE
);
2104 mrq
->data
->host_cookie
= 0;
2108 static int sdhci_pre_dma_transfer(struct sdhci_host
*host
,
2109 struct mmc_data
*data
,
2110 struct sdhci_host_next
*next
)
2114 if (!next
&& data
->host_cookie
&&
2115 data
->host_cookie
!= host
->next_data
.cookie
) {
2116 pr_debug(DRIVER_NAME
"[%s] invalid cookie: %d, next-cookie %d\n",
2117 __func__
, data
->host_cookie
, host
->next_data
.cookie
);
2118 data
->host_cookie
= 0;
2121 /* Check if next job is already prepared */
2123 (!next
&& data
->host_cookie
!= host
->next_data
.cookie
)) {
2124 sg_count
= dma_map_sg(mmc_dev(host
->mmc
), data
->sg
,
2126 data
->flags
& MMC_DATA_WRITE
?
2127 DMA_TO_DEVICE
: DMA_FROM_DEVICE
);
2130 sg_count
= host
->next_data
.sg_count
;
2131 host
->next_data
.sg_count
= 0;
2139 next
->sg_count
= sg_count
;
2140 data
->host_cookie
= ++next
->cookie
< 0 ? 1 : next
->cookie
;
2142 host
->sg_count
= sg_count
;
2147 static void sdhci_pre_req(struct mmc_host
*mmc
, struct mmc_request
*mrq
,
2150 struct sdhci_host
*host
= mmc_priv(mmc
);
2152 if (mrq
->data
->host_cookie
) {
2153 mrq
->data
->host_cookie
= 0;
2157 if (host
->flags
& SDHCI_REQ_USE_DMA
)
2158 if (sdhci_pre_dma_transfer(host
,
2160 &host
->next_data
) < 0)
2161 mrq
->data
->host_cookie
= 0;
2164 static void sdhci_card_event(struct mmc_host
*mmc
)
2166 struct sdhci_host
*host
= mmc_priv(mmc
);
2167 unsigned long flags
;
2170 /* First check if client has provided their own card event */
2171 if (host
->ops
->card_event
)
2172 host
->ops
->card_event(host
);
2174 present
= sdhci_do_get_cd(host
);
2176 spin_lock_irqsave(&host
->lock
, flags
);
2178 /* Check host->mrq first in case we are runtime suspended */
2179 if (host
->mrq
&& !present
) {
2180 pr_err("%s: Card removed during transfer!\n",
2181 mmc_hostname(host
->mmc
));
2182 pr_err("%s: Resetting controller.\n",
2183 mmc_hostname(host
->mmc
));
2185 sdhci_do_reset(host
, SDHCI_RESET_CMD
);
2186 sdhci_do_reset(host
, SDHCI_RESET_DATA
);
2188 host
->mrq
->cmd
->error
= -ENOMEDIUM
;
2189 tasklet_schedule(&host
->finish_tasklet
);
2192 spin_unlock_irqrestore(&host
->lock
, flags
);
2195 static const struct mmc_host_ops sdhci_ops
= {
2196 .request
= sdhci_request
,
2197 .post_req
= sdhci_post_req
,
2198 .pre_req
= sdhci_pre_req
,
2199 .set_ios
= sdhci_set_ios
,
2200 .get_cd
= sdhci_get_cd
,
2201 .get_ro
= sdhci_get_ro
,
2202 .hw_reset
= sdhci_hw_reset
,
2203 .enable_sdio_irq
= sdhci_enable_sdio_irq
,
2204 .start_signal_voltage_switch
= sdhci_start_signal_voltage_switch
,
2205 .prepare_hs400_tuning
= sdhci_prepare_hs400_tuning
,
2206 .execute_tuning
= sdhci_execute_tuning
,
2207 .select_drive_strength
= sdhci_select_drive_strength
,
2208 .card_event
= sdhci_card_event
,
2209 .card_busy
= sdhci_card_busy
,
2212 /*****************************************************************************\
2216 \*****************************************************************************/
2218 static void sdhci_tasklet_finish(unsigned long param
)
2220 struct sdhci_host
*host
;
2221 unsigned long flags
;
2222 struct mmc_request
*mrq
;
2224 host
= (struct sdhci_host
*)param
;
2226 spin_lock_irqsave(&host
->lock
, flags
);
2229 * If this tasklet gets rescheduled while running, it will
2230 * be run again afterwards but without any active request.
2233 spin_unlock_irqrestore(&host
->lock
, flags
);
2237 del_timer(&host
->timer
);
2242 * The controller needs a reset of internal state machines
2243 * upon error conditions.
2245 if (!(host
->flags
& SDHCI_DEVICE_DEAD
) &&
2246 ((mrq
->cmd
&& mrq
->cmd
->error
) ||
2247 (mrq
->sbc
&& mrq
->sbc
->error
) ||
2248 (mrq
->data
&& ((mrq
->data
->error
&& !mrq
->data
->stop
) ||
2249 (mrq
->data
->stop
&& mrq
->data
->stop
->error
))) ||
2250 (host
->quirks
& SDHCI_QUIRK_RESET_AFTER_REQUEST
))) {
2252 /* Some controllers need this kick or reset won't work here */
2253 if (host
->quirks
& SDHCI_QUIRK_CLOCK_BEFORE_RESET
)
2254 /* This is to force an update */
2255 host
->ops
->set_clock(host
, host
->clock
);
2257 /* Spec says we should do both at the same time, but Ricoh
2258 controllers do not like that. */
2259 sdhci_do_reset(host
, SDHCI_RESET_CMD
);
2260 sdhci_do_reset(host
, SDHCI_RESET_DATA
);
2267 #ifndef SDHCI_USE_LEDS_CLASS
2268 sdhci_deactivate_led(host
);
2272 spin_unlock_irqrestore(&host
->lock
, flags
);
2274 mmc_request_done(host
->mmc
, mrq
);
2275 sdhci_runtime_pm_put(host
);
2278 static void sdhci_timeout_timer(unsigned long data
)
2280 struct sdhci_host
*host
;
2281 unsigned long flags
;
2283 host
= (struct sdhci_host
*)data
;
2285 spin_lock_irqsave(&host
->lock
, flags
);
2288 pr_err("%s: Timeout waiting for hardware "
2289 "interrupt.\n", mmc_hostname(host
->mmc
));
2290 sdhci_dumpregs(host
);
2293 host
->data
->error
= -ETIMEDOUT
;
2294 sdhci_finish_data(host
);
2297 host
->cmd
->error
= -ETIMEDOUT
;
2299 host
->mrq
->cmd
->error
= -ETIMEDOUT
;
2301 tasklet_schedule(&host
->finish_tasklet
);
2306 spin_unlock_irqrestore(&host
->lock
, flags
);
2309 /*****************************************************************************\
2311 * Interrupt handling *
2313 \*****************************************************************************/
2315 static void sdhci_cmd_irq(struct sdhci_host
*host
, u32 intmask
, u32
*mask
)
2317 BUG_ON(intmask
== 0);
2320 pr_err("%s: Got command interrupt 0x%08x even "
2321 "though no command operation was in progress.\n",
2322 mmc_hostname(host
->mmc
), (unsigned)intmask
);
2323 sdhci_dumpregs(host
);
2327 if (intmask
& SDHCI_INT_TIMEOUT
)
2328 host
->cmd
->error
= -ETIMEDOUT
;
2329 else if (intmask
& (SDHCI_INT_CRC
| SDHCI_INT_END_BIT
|
2331 host
->cmd
->error
= -EILSEQ
;
2333 if (host
->cmd
->error
) {
2334 tasklet_schedule(&host
->finish_tasklet
);
2339 * The host can send and interrupt when the busy state has
2340 * ended, allowing us to wait without wasting CPU cycles.
2341 * Unfortunately this is overloaded on the "data complete"
2342 * interrupt, so we need to take some care when handling
2345 * Note: The 1.0 specification is a bit ambiguous about this
2346 * feature so there might be some problems with older
2349 if (host
->cmd
->flags
& MMC_RSP_BUSY
) {
2350 if (host
->cmd
->data
)
2351 DBG("Cannot wait for busy signal when also "
2352 "doing a data transfer");
2353 else if (!(host
->quirks
& SDHCI_QUIRK_NO_BUSY_IRQ
)
2354 && !host
->busy_handle
) {
2355 /* Mark that command complete before busy is ended */
2356 host
->busy_handle
= 1;
2360 /* The controller does not support the end-of-busy IRQ,
2361 * fall through and take the SDHCI_INT_RESPONSE */
2362 } else if ((host
->quirks2
& SDHCI_QUIRK2_STOP_WITH_TC
) &&
2363 host
->cmd
->opcode
== MMC_STOP_TRANSMISSION
&& !host
->data
) {
2364 *mask
&= ~SDHCI_INT_DATA_END
;
2367 if (intmask
& SDHCI_INT_RESPONSE
)
2368 sdhci_finish_command(host
);
2371 #ifdef CONFIG_MMC_DEBUG
2372 static void sdhci_adma_show_error(struct sdhci_host
*host
)
2374 const char *name
= mmc_hostname(host
->mmc
);
2375 void *desc
= host
->adma_table
;
2377 sdhci_dumpregs(host
);
2380 struct sdhci_adma2_64_desc
*dma_desc
= desc
;
2382 if (host
->flags
& SDHCI_USE_64_BIT_DMA
)
2383 DBG("%s: %p: DMA 0x%08x%08x, LEN 0x%04x, Attr=0x%02x\n",
2384 name
, desc
, le32_to_cpu(dma_desc
->addr_hi
),
2385 le32_to_cpu(dma_desc
->addr_lo
),
2386 le16_to_cpu(dma_desc
->len
),
2387 le16_to_cpu(dma_desc
->cmd
));
2389 DBG("%s: %p: DMA 0x%08x, LEN 0x%04x, Attr=0x%02x\n",
2390 name
, desc
, le32_to_cpu(dma_desc
->addr_lo
),
2391 le16_to_cpu(dma_desc
->len
),
2392 le16_to_cpu(dma_desc
->cmd
));
2394 desc
+= host
->desc_sz
;
2396 if (dma_desc
->cmd
& cpu_to_le16(ADMA2_END
))
2401 static void sdhci_adma_show_error(struct sdhci_host
*host
) { }
2404 static void sdhci_data_irq(struct sdhci_host
*host
, u32 intmask
)
2407 BUG_ON(intmask
== 0);
2409 /* CMD19 generates _only_ Buffer Read Ready interrupt */
2410 if (intmask
& SDHCI_INT_DATA_AVAIL
) {
2411 command
= SDHCI_GET_CMD(sdhci_readw(host
, SDHCI_COMMAND
));
2412 if (command
== MMC_SEND_TUNING_BLOCK
||
2413 command
== MMC_SEND_TUNING_BLOCK_HS200
) {
2414 host
->tuning_done
= 1;
2415 wake_up(&host
->buf_ready_int
);
2422 * The "data complete" interrupt is also used to
2423 * indicate that a busy state has ended. See comment
2424 * above in sdhci_cmd_irq().
2426 if (host
->cmd
&& (host
->cmd
->flags
& MMC_RSP_BUSY
)) {
2427 if (intmask
& SDHCI_INT_DATA_TIMEOUT
) {
2428 host
->cmd
->error
= -ETIMEDOUT
;
2429 tasklet_schedule(&host
->finish_tasklet
);
2432 if (intmask
& SDHCI_INT_DATA_END
) {
2434 * Some cards handle busy-end interrupt
2435 * before the command completed, so make
2436 * sure we do things in the proper order.
2438 if (host
->busy_handle
)
2439 sdhci_finish_command(host
);
2441 host
->busy_handle
= 1;
2446 pr_err("%s: Got data interrupt 0x%08x even "
2447 "though no data operation was in progress.\n",
2448 mmc_hostname(host
->mmc
), (unsigned)intmask
);
2449 sdhci_dumpregs(host
);
2454 if (intmask
& SDHCI_INT_DATA_TIMEOUT
)
2455 host
->data
->error
= -ETIMEDOUT
;
2456 else if (intmask
& SDHCI_INT_DATA_END_BIT
)
2457 host
->data
->error
= -EILSEQ
;
2458 else if ((intmask
& SDHCI_INT_DATA_CRC
) &&
2459 SDHCI_GET_CMD(sdhci_readw(host
, SDHCI_COMMAND
))
2461 host
->data
->error
= -EILSEQ
;
2462 else if (intmask
& SDHCI_INT_ADMA_ERROR
) {
2463 pr_err("%s: ADMA error\n", mmc_hostname(host
->mmc
));
2464 sdhci_adma_show_error(host
);
2465 host
->data
->error
= -EIO
;
2466 if (host
->ops
->adma_workaround
)
2467 host
->ops
->adma_workaround(host
, intmask
);
2470 if (host
->data
->error
)
2471 sdhci_finish_data(host
);
2473 if (intmask
& (SDHCI_INT_DATA_AVAIL
| SDHCI_INT_SPACE_AVAIL
))
2474 sdhci_transfer_pio(host
);
2477 * We currently don't do anything fancy with DMA
2478 * boundaries, but as we can't disable the feature
2479 * we need to at least restart the transfer.
2481 * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS)
2482 * should return a valid address to continue from, but as
2483 * some controllers are faulty, don't trust them.
2485 if (intmask
& SDHCI_INT_DMA_END
) {
2486 u32 dmastart
, dmanow
;
2487 dmastart
= sg_dma_address(host
->data
->sg
);
2488 dmanow
= dmastart
+ host
->data
->bytes_xfered
;
2490 * Force update to the next DMA block boundary.
2493 ~(SDHCI_DEFAULT_BOUNDARY_SIZE
- 1)) +
2494 SDHCI_DEFAULT_BOUNDARY_SIZE
;
2495 host
->data
->bytes_xfered
= dmanow
- dmastart
;
2496 DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes,"
2498 mmc_hostname(host
->mmc
), dmastart
,
2499 host
->data
->bytes_xfered
, dmanow
);
2500 sdhci_writel(host
, dmanow
, SDHCI_DMA_ADDRESS
);
2503 if (intmask
& SDHCI_INT_DATA_END
) {
2506 * Data managed to finish before the
2507 * command completed. Make sure we do
2508 * things in the proper order.
2510 host
->data_early
= 1;
2512 sdhci_finish_data(host
);
2518 static irqreturn_t
sdhci_irq(int irq
, void *dev_id
)
2520 irqreturn_t result
= IRQ_NONE
;
2521 struct sdhci_host
*host
= dev_id
;
2522 u32 intmask
, mask
, unexpected
= 0;
2525 spin_lock(&host
->lock
);
2527 if (host
->runtime_suspended
&& !sdhci_sdio_irq_enabled(host
)) {
2528 spin_unlock(&host
->lock
);
2532 intmask
= sdhci_readl(host
, SDHCI_INT_STATUS
);
2533 if (!intmask
|| intmask
== 0xffffffff) {
2539 /* Clear selected interrupts. */
2540 mask
= intmask
& (SDHCI_INT_CMD_MASK
| SDHCI_INT_DATA_MASK
|
2541 SDHCI_INT_BUS_POWER
);
2542 sdhci_writel(host
, mask
, SDHCI_INT_STATUS
);
2544 DBG("*** %s got interrupt: 0x%08x\n",
2545 mmc_hostname(host
->mmc
), intmask
);
2547 if (intmask
& (SDHCI_INT_CARD_INSERT
| SDHCI_INT_CARD_REMOVE
)) {
2548 u32 present
= sdhci_readl(host
, SDHCI_PRESENT_STATE
) &
2552 * There is a observation on i.mx esdhc. INSERT
2553 * bit will be immediately set again when it gets
2554 * cleared, if a card is inserted. We have to mask
2555 * the irq to prevent interrupt storm which will
2556 * freeze the system. And the REMOVE gets the
2559 * More testing are needed here to ensure it works
2560 * for other platforms though.
2562 host
->ier
&= ~(SDHCI_INT_CARD_INSERT
|
2563 SDHCI_INT_CARD_REMOVE
);
2564 host
->ier
|= present
? SDHCI_INT_CARD_REMOVE
:
2565 SDHCI_INT_CARD_INSERT
;
2566 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
2567 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
2569 sdhci_writel(host
, intmask
& (SDHCI_INT_CARD_INSERT
|
2570 SDHCI_INT_CARD_REMOVE
), SDHCI_INT_STATUS
);
2572 host
->thread_isr
|= intmask
& (SDHCI_INT_CARD_INSERT
|
2573 SDHCI_INT_CARD_REMOVE
);
2574 result
= IRQ_WAKE_THREAD
;
2577 if (intmask
& SDHCI_INT_CMD_MASK
)
2578 sdhci_cmd_irq(host
, intmask
& SDHCI_INT_CMD_MASK
,
2581 if (intmask
& SDHCI_INT_DATA_MASK
)
2582 sdhci_data_irq(host
, intmask
& SDHCI_INT_DATA_MASK
);
2584 if (intmask
& SDHCI_INT_BUS_POWER
)
2585 pr_err("%s: Card is consuming too much power!\n",
2586 mmc_hostname(host
->mmc
));
2588 if (intmask
& SDHCI_INT_CARD_INT
) {
2589 sdhci_enable_sdio_irq_nolock(host
, false);
2590 host
->thread_isr
|= SDHCI_INT_CARD_INT
;
2591 result
= IRQ_WAKE_THREAD
;
2594 intmask
&= ~(SDHCI_INT_CARD_INSERT
| SDHCI_INT_CARD_REMOVE
|
2595 SDHCI_INT_CMD_MASK
| SDHCI_INT_DATA_MASK
|
2596 SDHCI_INT_ERROR
| SDHCI_INT_BUS_POWER
|
2597 SDHCI_INT_CARD_INT
);
2600 unexpected
|= intmask
;
2601 sdhci_writel(host
, intmask
, SDHCI_INT_STATUS
);
2604 if (result
== IRQ_NONE
)
2605 result
= IRQ_HANDLED
;
2607 intmask
= sdhci_readl(host
, SDHCI_INT_STATUS
);
2608 } while (intmask
&& --max_loops
);
2610 spin_unlock(&host
->lock
);
2613 pr_err("%s: Unexpected interrupt 0x%08x.\n",
2614 mmc_hostname(host
->mmc
), unexpected
);
2615 sdhci_dumpregs(host
);
2621 static irqreturn_t
sdhci_thread_irq(int irq
, void *dev_id
)
2623 struct sdhci_host
*host
= dev_id
;
2624 unsigned long flags
;
2627 spin_lock_irqsave(&host
->lock
, flags
);
2628 isr
= host
->thread_isr
;
2629 host
->thread_isr
= 0;
2630 spin_unlock_irqrestore(&host
->lock
, flags
);
2632 if (isr
& (SDHCI_INT_CARD_INSERT
| SDHCI_INT_CARD_REMOVE
)) {
2633 sdhci_card_event(host
->mmc
);
2634 mmc_detect_change(host
->mmc
, msecs_to_jiffies(200));
2637 if (isr
& SDHCI_INT_CARD_INT
) {
2638 sdio_run_irqs(host
->mmc
);
2640 spin_lock_irqsave(&host
->lock
, flags
);
2641 if (host
->flags
& SDHCI_SDIO_IRQ_ENABLED
)
2642 sdhci_enable_sdio_irq_nolock(host
, true);
2643 spin_unlock_irqrestore(&host
->lock
, flags
);
2646 return isr
? IRQ_HANDLED
: IRQ_NONE
;
2649 /*****************************************************************************\
2653 \*****************************************************************************/
2656 void sdhci_enable_irq_wakeups(struct sdhci_host
*host
)
2659 u8 mask
= SDHCI_WAKE_ON_INSERT
| SDHCI_WAKE_ON_REMOVE
2660 | SDHCI_WAKE_ON_INT
;
2662 val
= sdhci_readb(host
, SDHCI_WAKE_UP_CONTROL
);
2664 /* Avoid fake wake up */
2665 if (host
->quirks
& SDHCI_QUIRK_BROKEN_CARD_DETECTION
)
2666 val
&= ~(SDHCI_WAKE_ON_INSERT
| SDHCI_WAKE_ON_REMOVE
);
2667 sdhci_writeb(host
, val
, SDHCI_WAKE_UP_CONTROL
);
2669 EXPORT_SYMBOL_GPL(sdhci_enable_irq_wakeups
);
2671 static void sdhci_disable_irq_wakeups(struct sdhci_host
*host
)
2674 u8 mask
= SDHCI_WAKE_ON_INSERT
| SDHCI_WAKE_ON_REMOVE
2675 | SDHCI_WAKE_ON_INT
;
2677 val
= sdhci_readb(host
, SDHCI_WAKE_UP_CONTROL
);
2679 sdhci_writeb(host
, val
, SDHCI_WAKE_UP_CONTROL
);
2682 int sdhci_suspend_host(struct sdhci_host
*host
)
2684 sdhci_disable_card_detection(host
);
2686 mmc_retune_timer_stop(host
->mmc
);
2687 mmc_retune_needed(host
->mmc
);
2689 if (!device_may_wakeup(mmc_dev(host
->mmc
))) {
2691 sdhci_writel(host
, 0, SDHCI_INT_ENABLE
);
2692 sdhci_writel(host
, 0, SDHCI_SIGNAL_ENABLE
);
2693 free_irq(host
->irq
, host
);
2695 sdhci_enable_irq_wakeups(host
);
2696 enable_irq_wake(host
->irq
);
2701 EXPORT_SYMBOL_GPL(sdhci_suspend_host
);
2703 int sdhci_resume_host(struct sdhci_host
*host
)
2707 if (host
->flags
& (SDHCI_USE_SDMA
| SDHCI_USE_ADMA
)) {
2708 if (host
->ops
->enable_dma
)
2709 host
->ops
->enable_dma(host
);
2712 if (!device_may_wakeup(mmc_dev(host
->mmc
))) {
2713 ret
= request_threaded_irq(host
->irq
, sdhci_irq
,
2714 sdhci_thread_irq
, IRQF_SHARED
,
2715 mmc_hostname(host
->mmc
), host
);
2719 sdhci_disable_irq_wakeups(host
);
2720 disable_irq_wake(host
->irq
);
2723 if ((host
->mmc
->pm_flags
& MMC_PM_KEEP_POWER
) &&
2724 (host
->quirks2
& SDHCI_QUIRK2_HOST_OFF_CARD_ON
)) {
2725 /* Card keeps power but host controller does not */
2726 sdhci_init(host
, 0);
2729 sdhci_do_set_ios(host
, &host
->mmc
->ios
);
2731 sdhci_init(host
, (host
->mmc
->pm_flags
& MMC_PM_KEEP_POWER
));
2735 sdhci_enable_card_detection(host
);
2740 EXPORT_SYMBOL_GPL(sdhci_resume_host
);
2742 static int sdhci_runtime_pm_get(struct sdhci_host
*host
)
2744 return pm_runtime_get_sync(host
->mmc
->parent
);
2747 static int sdhci_runtime_pm_put(struct sdhci_host
*host
)
2749 pm_runtime_mark_last_busy(host
->mmc
->parent
);
2750 return pm_runtime_put_autosuspend(host
->mmc
->parent
);
2753 static void sdhci_runtime_pm_bus_on(struct sdhci_host
*host
)
2755 if (host
->runtime_suspended
|| host
->bus_on
)
2757 host
->bus_on
= true;
2758 pm_runtime_get_noresume(host
->mmc
->parent
);
2761 static void sdhci_runtime_pm_bus_off(struct sdhci_host
*host
)
2763 if (host
->runtime_suspended
|| !host
->bus_on
)
2765 host
->bus_on
= false;
2766 pm_runtime_put_noidle(host
->mmc
->parent
);
2769 int sdhci_runtime_suspend_host(struct sdhci_host
*host
)
2771 unsigned long flags
;
2773 mmc_retune_timer_stop(host
->mmc
);
2774 mmc_retune_needed(host
->mmc
);
2776 spin_lock_irqsave(&host
->lock
, flags
);
2777 host
->ier
&= SDHCI_INT_CARD_INT
;
2778 sdhci_writel(host
, host
->ier
, SDHCI_INT_ENABLE
);
2779 sdhci_writel(host
, host
->ier
, SDHCI_SIGNAL_ENABLE
);
2780 spin_unlock_irqrestore(&host
->lock
, flags
);
2782 synchronize_hardirq(host
->irq
);
2784 spin_lock_irqsave(&host
->lock
, flags
);
2785 host
->runtime_suspended
= true;
2786 spin_unlock_irqrestore(&host
->lock
, flags
);
2790 EXPORT_SYMBOL_GPL(sdhci_runtime_suspend_host
);
2792 int sdhci_runtime_resume_host(struct sdhci_host
*host
)
2794 unsigned long flags
;
2795 int host_flags
= host
->flags
;
2797 if (host_flags
& (SDHCI_USE_SDMA
| SDHCI_USE_ADMA
)) {
2798 if (host
->ops
->enable_dma
)
2799 host
->ops
->enable_dma(host
);
2802 sdhci_init(host
, 0);
2804 /* Force clock and power re-program */
2807 sdhci_do_start_signal_voltage_switch(host
, &host
->mmc
->ios
);
2808 sdhci_do_set_ios(host
, &host
->mmc
->ios
);
2810 if ((host_flags
& SDHCI_PV_ENABLED
) &&
2811 !(host
->quirks2
& SDHCI_QUIRK2_PRESET_VALUE_BROKEN
)) {
2812 spin_lock_irqsave(&host
->lock
, flags
);
2813 sdhci_enable_preset_value(host
, true);
2814 spin_unlock_irqrestore(&host
->lock
, flags
);
2817 spin_lock_irqsave(&host
->lock
, flags
);
2819 host
->runtime_suspended
= false;
2821 /* Enable SDIO IRQ */
2822 if (host
->flags
& SDHCI_SDIO_IRQ_ENABLED
)
2823 sdhci_enable_sdio_irq_nolock(host
, true);
2825 /* Enable Card Detection */
2826 sdhci_enable_card_detection(host
);
2828 spin_unlock_irqrestore(&host
->lock
, flags
);
2832 EXPORT_SYMBOL_GPL(sdhci_runtime_resume_host
);
2834 #endif /* CONFIG_PM */
2836 /*****************************************************************************\
2838 * Device allocation/registration *
2840 \*****************************************************************************/
2842 struct sdhci_host
*sdhci_alloc_host(struct device
*dev
,
2845 struct mmc_host
*mmc
;
2846 struct sdhci_host
*host
;
2848 WARN_ON(dev
== NULL
);
2850 mmc
= mmc_alloc_host(sizeof(struct sdhci_host
) + priv_size
, dev
);
2852 return ERR_PTR(-ENOMEM
);
2854 host
= mmc_priv(mmc
);
2860 EXPORT_SYMBOL_GPL(sdhci_alloc_host
);
2862 int sdhci_add_host(struct sdhci_host
*host
)
2864 struct mmc_host
*mmc
;
2865 u32 caps
[2] = {0, 0};
2866 u32 max_current_caps
;
2867 unsigned int ocr_avail
;
2868 unsigned int override_timeout_clk
;
2871 WARN_ON(host
== NULL
);
2878 host
->quirks
= debug_quirks
;
2880 host
->quirks2
= debug_quirks2
;
2882 override_timeout_clk
= host
->timeout_clk
;
2884 sdhci_do_reset(host
, SDHCI_RESET_ALL
);
2886 host
->version
= sdhci_readw(host
, SDHCI_HOST_VERSION
);
2887 host
->version
= (host
->version
& SDHCI_SPEC_VER_MASK
)
2888 >> SDHCI_SPEC_VER_SHIFT
;
2889 if (host
->version
> SDHCI_SPEC_300
) {
2890 pr_err("%s: Unknown controller version (%d). "
2891 "You may experience problems.\n", mmc_hostname(mmc
),
2895 caps
[0] = (host
->quirks
& SDHCI_QUIRK_MISSING_CAPS
) ? host
->caps
:
2896 sdhci_readl(host
, SDHCI_CAPABILITIES
);
2898 if (host
->version
>= SDHCI_SPEC_300
)
2899 caps
[1] = (host
->quirks
& SDHCI_QUIRK_MISSING_CAPS
) ?
2901 sdhci_readl(host
, SDHCI_CAPABILITIES_1
);
2903 if (host
->quirks
& SDHCI_QUIRK_FORCE_DMA
)
2904 host
->flags
|= SDHCI_USE_SDMA
;
2905 else if (!(caps
[0] & SDHCI_CAN_DO_SDMA
))
2906 DBG("Controller doesn't have SDMA capability\n");
2908 host
->flags
|= SDHCI_USE_SDMA
;
2910 if ((host
->quirks
& SDHCI_QUIRK_BROKEN_DMA
) &&
2911 (host
->flags
& SDHCI_USE_SDMA
)) {
2912 DBG("Disabling DMA as it is marked broken\n");
2913 host
->flags
&= ~SDHCI_USE_SDMA
;
2916 if ((host
->version
>= SDHCI_SPEC_200
) &&
2917 (caps
[0] & SDHCI_CAN_DO_ADMA2
))
2918 host
->flags
|= SDHCI_USE_ADMA
;
2920 if ((host
->quirks
& SDHCI_QUIRK_BROKEN_ADMA
) &&
2921 (host
->flags
& SDHCI_USE_ADMA
)) {
2922 DBG("Disabling ADMA as it is marked broken\n");
2923 host
->flags
&= ~SDHCI_USE_ADMA
;
2927 * It is assumed that a 64-bit capable device has set a 64-bit DMA mask
2928 * and *must* do 64-bit DMA. A driver has the opportunity to change
2929 * that during the first call to ->enable_dma(). Similarly
2930 * SDHCI_QUIRK2_BROKEN_64_BIT_DMA must be left to the drivers to
2933 if (sdhci_readl(host
, SDHCI_CAPABILITIES
) & SDHCI_CAN_64BIT
)
2934 host
->flags
|= SDHCI_USE_64_BIT_DMA
;
2936 if (host
->flags
& (SDHCI_USE_SDMA
| SDHCI_USE_ADMA
)) {
2937 if (host
->ops
->enable_dma
) {
2938 if (host
->ops
->enable_dma(host
)) {
2939 pr_warn("%s: No suitable DMA available - falling back to PIO\n",
2942 ~(SDHCI_USE_SDMA
| SDHCI_USE_ADMA
);
2947 /* SDMA does not support 64-bit DMA */
2948 if (host
->flags
& SDHCI_USE_64_BIT_DMA
)
2949 host
->flags
&= ~SDHCI_USE_SDMA
;
2951 if (host
->flags
& SDHCI_USE_ADMA
) {
2953 * The DMA descriptor table size is calculated as the maximum
2954 * number of segments times 2, to allow for an alignment
2955 * descriptor for each segment, plus 1 for a nop end descriptor,
2956 * all multipled by the descriptor size.
2958 if (host
->flags
& SDHCI_USE_64_BIT_DMA
) {
2959 host
->adma_table_sz
= (SDHCI_MAX_SEGS
* 2 + 1) *
2960 SDHCI_ADMA2_64_DESC_SZ
;
2961 host
->align_buffer_sz
= SDHCI_MAX_SEGS
*
2962 SDHCI_ADMA2_64_ALIGN
;
2963 host
->desc_sz
= SDHCI_ADMA2_64_DESC_SZ
;
2964 host
->align_sz
= SDHCI_ADMA2_64_ALIGN
;
2965 host
->align_mask
= SDHCI_ADMA2_64_ALIGN
- 1;
2967 host
->adma_table_sz
= (SDHCI_MAX_SEGS
* 2 + 1) *
2968 SDHCI_ADMA2_32_DESC_SZ
;
2969 host
->align_buffer_sz
= SDHCI_MAX_SEGS
*
2970 SDHCI_ADMA2_32_ALIGN
;
2971 host
->desc_sz
= SDHCI_ADMA2_32_DESC_SZ
;
2972 host
->align_sz
= SDHCI_ADMA2_32_ALIGN
;
2973 host
->align_mask
= SDHCI_ADMA2_32_ALIGN
- 1;
2975 host
->adma_table
= dma_alloc_coherent(mmc_dev(mmc
),
2976 host
->adma_table_sz
,
2979 host
->align_buffer
= kmalloc(host
->align_buffer_sz
, GFP_KERNEL
);
2980 if (!host
->adma_table
|| !host
->align_buffer
) {
2981 dma_free_coherent(mmc_dev(mmc
), host
->adma_table_sz
,
2982 host
->adma_table
, host
->adma_addr
);
2983 kfree(host
->align_buffer
);
2984 pr_warn("%s: Unable to allocate ADMA buffers - falling back to standard DMA\n",
2986 host
->flags
&= ~SDHCI_USE_ADMA
;
2987 host
->adma_table
= NULL
;
2988 host
->align_buffer
= NULL
;
2989 } else if (host
->adma_addr
& host
->align_mask
) {
2990 pr_warn("%s: unable to allocate aligned ADMA descriptor\n",
2992 host
->flags
&= ~SDHCI_USE_ADMA
;
2993 dma_free_coherent(mmc_dev(mmc
), host
->adma_table_sz
,
2994 host
->adma_table
, host
->adma_addr
);
2995 kfree(host
->align_buffer
);
2996 host
->adma_table
= NULL
;
2997 host
->align_buffer
= NULL
;
3002 * If we use DMA, then it's up to the caller to set the DMA
3003 * mask, but PIO does not need the hw shim so we set a new
3004 * mask here in that case.
3006 if (!(host
->flags
& (SDHCI_USE_SDMA
| SDHCI_USE_ADMA
))) {
3007 host
->dma_mask
= DMA_BIT_MASK(64);
3008 mmc_dev(mmc
)->dma_mask
= &host
->dma_mask
;
3011 if (host
->version
>= SDHCI_SPEC_300
)
3012 host
->max_clk
= (caps
[0] & SDHCI_CLOCK_V3_BASE_MASK
)
3013 >> SDHCI_CLOCK_BASE_SHIFT
;
3015 host
->max_clk
= (caps
[0] & SDHCI_CLOCK_BASE_MASK
)
3016 >> SDHCI_CLOCK_BASE_SHIFT
;
3018 host
->max_clk
*= 1000000;
3019 if (host
->max_clk
== 0 || host
->quirks
&
3020 SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN
) {
3021 if (!host
->ops
->get_max_clock
) {
3022 pr_err("%s: Hardware doesn't specify base clock "
3023 "frequency.\n", mmc_hostname(mmc
));
3026 host
->max_clk
= host
->ops
->get_max_clock(host
);
3029 host
->next_data
.cookie
= 1;
3031 * In case of Host Controller v3.00, find out whether clock
3032 * multiplier is supported.
3034 host
->clk_mul
= (caps
[1] & SDHCI_CLOCK_MUL_MASK
) >>
3035 SDHCI_CLOCK_MUL_SHIFT
;
3038 * In case the value in Clock Multiplier is 0, then programmable
3039 * clock mode is not supported, otherwise the actual clock
3040 * multiplier is one more than the value of Clock Multiplier
3041 * in the Capabilities Register.
3047 * Set host parameters.
3049 mmc
->ops
= &sdhci_ops
;
3050 mmc
->f_max
= host
->max_clk
;
3051 if (host
->ops
->get_min_clock
)
3052 mmc
->f_min
= host
->ops
->get_min_clock(host
);
3053 else if (host
->version
>= SDHCI_SPEC_300
) {
3054 if (host
->clk_mul
) {
3055 mmc
->f_min
= (host
->max_clk
* host
->clk_mul
) / 1024;
3056 mmc
->f_max
= host
->max_clk
* host
->clk_mul
;
3058 mmc
->f_min
= host
->max_clk
/ SDHCI_MAX_DIV_SPEC_300
;
3060 mmc
->f_min
= host
->max_clk
/ SDHCI_MAX_DIV_SPEC_200
;
3062 if (!(host
->quirks
& SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK
)) {
3063 host
->timeout_clk
= (caps
[0] & SDHCI_TIMEOUT_CLK_MASK
) >>
3064 SDHCI_TIMEOUT_CLK_SHIFT
;
3065 if (host
->timeout_clk
== 0) {
3066 if (host
->ops
->get_timeout_clock
) {
3068 host
->ops
->get_timeout_clock(host
);
3070 pr_err("%s: Hardware doesn't specify timeout clock frequency.\n",
3076 if (caps
[0] & SDHCI_TIMEOUT_CLK_UNIT
)
3077 host
->timeout_clk
*= 1000;
3079 mmc
->max_busy_timeout
= host
->ops
->get_max_timeout_count
?
3080 host
->ops
->get_max_timeout_count(host
) : 1 << 27;
3081 mmc
->max_busy_timeout
/= host
->timeout_clk
;
3084 if (override_timeout_clk
)
3085 host
->timeout_clk
= override_timeout_clk
;
3087 mmc
->caps
|= MMC_CAP_SDIO_IRQ
| MMC_CAP_ERASE
| MMC_CAP_CMD23
;
3088 mmc
->caps2
|= MMC_CAP2_SDIO_IRQ_NOTHREAD
;
3090 if (host
->quirks
& SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12
)
3091 host
->flags
|= SDHCI_AUTO_CMD12
;
3093 /* Auto-CMD23 stuff only works in ADMA or PIO. */
3094 if ((host
->version
>= SDHCI_SPEC_300
) &&
3095 ((host
->flags
& SDHCI_USE_ADMA
) ||
3096 !(host
->flags
& SDHCI_USE_SDMA
)) &&
3097 !(host
->quirks2
& SDHCI_QUIRK2_ACMD23_BROKEN
)) {
3098 host
->flags
|= SDHCI_AUTO_CMD23
;
3099 DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc
));
3101 DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc
));
3105 * A controller may support 8-bit width, but the board itself
3106 * might not have the pins brought out. Boards that support
3107 * 8-bit width must set "mmc->caps |= MMC_CAP_8_BIT_DATA;" in
3108 * their platform code before calling sdhci_add_host(), and we
3109 * won't assume 8-bit width for hosts without that CAP.
3111 if (!(host
->quirks
& SDHCI_QUIRK_FORCE_1_BIT_DATA
))
3112 mmc
->caps
|= MMC_CAP_4_BIT_DATA
;
3114 if (host
->quirks2
& SDHCI_QUIRK2_HOST_NO_CMD23
)
3115 mmc
->caps
&= ~MMC_CAP_CMD23
;
3117 if (caps
[0] & SDHCI_CAN_DO_HISPD
)
3118 mmc
->caps
|= MMC_CAP_SD_HIGHSPEED
| MMC_CAP_MMC_HIGHSPEED
;
3120 if ((host
->quirks
& SDHCI_QUIRK_BROKEN_CARD_DETECTION
) &&
3121 !(mmc
->caps
& MMC_CAP_NONREMOVABLE
))
3122 mmc
->caps
|= MMC_CAP_NEEDS_POLL
;
3124 /* If there are external regulators, get them */
3125 if (mmc_regulator_get_supply(mmc
) == -EPROBE_DEFER
)
3126 return -EPROBE_DEFER
;
3128 /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */
3129 if (!IS_ERR(mmc
->supply
.vqmmc
)) {
3130 ret
= regulator_enable(mmc
->supply
.vqmmc
);
3131 if (!regulator_is_supported_voltage(mmc
->supply
.vqmmc
, 1700000,
3133 caps
[1] &= ~(SDHCI_SUPPORT_SDR104
|
3134 SDHCI_SUPPORT_SDR50
|
3135 SDHCI_SUPPORT_DDR50
);
3137 pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
3138 mmc_hostname(mmc
), ret
);
3139 mmc
->supply
.vqmmc
= ERR_PTR(-EINVAL
);
3143 if (host
->quirks2
& SDHCI_QUIRK2_NO_1_8_V
)
3144 caps
[1] &= ~(SDHCI_SUPPORT_SDR104
| SDHCI_SUPPORT_SDR50
|
3145 SDHCI_SUPPORT_DDR50
);
3147 /* Any UHS-I mode in caps implies SDR12 and SDR25 support. */
3148 if (caps
[1] & (SDHCI_SUPPORT_SDR104
| SDHCI_SUPPORT_SDR50
|
3149 SDHCI_SUPPORT_DDR50
))
3150 mmc
->caps
|= MMC_CAP_UHS_SDR12
| MMC_CAP_UHS_SDR25
;
3152 /* SDR104 supports also implies SDR50 support */
3153 if (caps
[1] & SDHCI_SUPPORT_SDR104
) {
3154 mmc
->caps
|= MMC_CAP_UHS_SDR104
| MMC_CAP_UHS_SDR50
;
3155 /* SD3.0: SDR104 is supported so (for eMMC) the caps2
3156 * field can be promoted to support HS200.
3158 if (!(host
->quirks2
& SDHCI_QUIRK2_BROKEN_HS200
))
3159 mmc
->caps2
|= MMC_CAP2_HS200
;
3160 } else if (caps
[1] & SDHCI_SUPPORT_SDR50
)
3161 mmc
->caps
|= MMC_CAP_UHS_SDR50
;
3163 if (host
->quirks2
& SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400
&&
3164 (caps
[1] & SDHCI_SUPPORT_HS400
))
3165 mmc
->caps2
|= MMC_CAP2_HS400
;
3167 if ((mmc
->caps2
& MMC_CAP2_HSX00_1_2V
) &&
3168 (IS_ERR(mmc
->supply
.vqmmc
) ||
3169 !regulator_is_supported_voltage(mmc
->supply
.vqmmc
, 1100000,
3171 mmc
->caps2
&= ~MMC_CAP2_HSX00_1_2V
;
3173 if ((caps
[1] & SDHCI_SUPPORT_DDR50
) &&
3174 !(host
->quirks2
& SDHCI_QUIRK2_BROKEN_DDR50
))
3175 mmc
->caps
|= MMC_CAP_UHS_DDR50
;
3177 /* Does the host need tuning for SDR50? */
3178 if (caps
[1] & SDHCI_USE_SDR50_TUNING
)
3179 host
->flags
|= SDHCI_SDR50_NEEDS_TUNING
;
3181 /* Does the host need tuning for SDR104 / HS200? */
3182 if (mmc
->caps2
& MMC_CAP2_HS200
)
3183 host
->flags
|= SDHCI_SDR104_NEEDS_TUNING
;
3185 /* Driver Type(s) (A, C, D) supported by the host */
3186 if (caps
[1] & SDHCI_DRIVER_TYPE_A
)
3187 mmc
->caps
|= MMC_CAP_DRIVER_TYPE_A
;
3188 if (caps
[1] & SDHCI_DRIVER_TYPE_C
)
3189 mmc
->caps
|= MMC_CAP_DRIVER_TYPE_C
;
3190 if (caps
[1] & SDHCI_DRIVER_TYPE_D
)
3191 mmc
->caps
|= MMC_CAP_DRIVER_TYPE_D
;
3193 /* Initial value for re-tuning timer count */
3194 host
->tuning_count
= (caps
[1] & SDHCI_RETUNING_TIMER_COUNT_MASK
) >>
3195 SDHCI_RETUNING_TIMER_COUNT_SHIFT
;
3198 * In case Re-tuning Timer is not disabled, the actual value of
3199 * re-tuning timer will be 2 ^ (n - 1).
3201 if (host
->tuning_count
)
3202 host
->tuning_count
= 1 << (host
->tuning_count
- 1);
3204 /* Re-tuning mode supported by the Host Controller */
3205 host
->tuning_mode
= (caps
[1] & SDHCI_RETUNING_MODE_MASK
) >>
3206 SDHCI_RETUNING_MODE_SHIFT
;
3211 * According to SD Host Controller spec v3.00, if the Host System
3212 * can afford more than 150mA, Host Driver should set XPC to 1. Also
3213 * the value is meaningful only if Voltage Support in the Capabilities
3214 * register is set. The actual current value is 4 times the register
3217 max_current_caps
= sdhci_readl(host
, SDHCI_MAX_CURRENT
);
3218 if (!max_current_caps
&& !IS_ERR(mmc
->supply
.vmmc
)) {
3219 int curr
= regulator_get_current_limit(mmc
->supply
.vmmc
);
3222 /* convert to SDHCI_MAX_CURRENT format */
3223 curr
= curr
/1000; /* convert to mA */
3224 curr
= curr
/SDHCI_MAX_CURRENT_MULTIPLIER
;
3226 curr
= min_t(u32
, curr
, SDHCI_MAX_CURRENT_LIMIT
);
3228 (curr
<< SDHCI_MAX_CURRENT_330_SHIFT
) |
3229 (curr
<< SDHCI_MAX_CURRENT_300_SHIFT
) |
3230 (curr
<< SDHCI_MAX_CURRENT_180_SHIFT
);
3234 if (caps
[0] & SDHCI_CAN_VDD_330
) {
3235 ocr_avail
|= MMC_VDD_32_33
| MMC_VDD_33_34
;
3237 mmc
->max_current_330
= ((max_current_caps
&
3238 SDHCI_MAX_CURRENT_330_MASK
) >>
3239 SDHCI_MAX_CURRENT_330_SHIFT
) *
3240 SDHCI_MAX_CURRENT_MULTIPLIER
;
3242 if (caps
[0] & SDHCI_CAN_VDD_300
) {
3243 ocr_avail
|= MMC_VDD_29_30
| MMC_VDD_30_31
;
3245 mmc
->max_current_300
= ((max_current_caps
&
3246 SDHCI_MAX_CURRENT_300_MASK
) >>
3247 SDHCI_MAX_CURRENT_300_SHIFT
) *
3248 SDHCI_MAX_CURRENT_MULTIPLIER
;
3250 if (caps
[0] & SDHCI_CAN_VDD_180
) {
3251 ocr_avail
|= MMC_VDD_165_195
;
3253 mmc
->max_current_180
= ((max_current_caps
&
3254 SDHCI_MAX_CURRENT_180_MASK
) >>
3255 SDHCI_MAX_CURRENT_180_SHIFT
) *
3256 SDHCI_MAX_CURRENT_MULTIPLIER
;
3259 /* If OCR set by host, use it instead. */
3261 ocr_avail
= host
->ocr_mask
;
3263 /* If OCR set by external regulators, give it highest prio. */
3265 ocr_avail
= mmc
->ocr_avail
;
3267 mmc
->ocr_avail
= ocr_avail
;
3268 mmc
->ocr_avail_sdio
= ocr_avail
;
3269 if (host
->ocr_avail_sdio
)
3270 mmc
->ocr_avail_sdio
&= host
->ocr_avail_sdio
;
3271 mmc
->ocr_avail_sd
= ocr_avail
;
3272 if (host
->ocr_avail_sd
)
3273 mmc
->ocr_avail_sd
&= host
->ocr_avail_sd
;
3274 else /* normal SD controllers don't support 1.8V */
3275 mmc
->ocr_avail_sd
&= ~MMC_VDD_165_195
;
3276 mmc
->ocr_avail_mmc
= ocr_avail
;
3277 if (host
->ocr_avail_mmc
)
3278 mmc
->ocr_avail_mmc
&= host
->ocr_avail_mmc
;
3280 if (mmc
->ocr_avail
== 0) {
3281 pr_err("%s: Hardware doesn't report any "
3282 "support voltages.\n", mmc_hostname(mmc
));
3286 spin_lock_init(&host
->lock
);
3289 * Maximum number of segments. Depends on if the hardware
3290 * can do scatter/gather or not.
3292 if (host
->flags
& SDHCI_USE_ADMA
)
3293 mmc
->max_segs
= SDHCI_MAX_SEGS
;
3294 else if (host
->flags
& SDHCI_USE_SDMA
)
3297 mmc
->max_segs
= SDHCI_MAX_SEGS
;
3300 * Maximum number of sectors in one transfer. Limited by SDMA boundary
3301 * size (512KiB). Note some tuning modes impose a 4MiB limit, but this
3304 mmc
->max_req_size
= 524288;
3307 * Maximum segment size. Could be one segment with the maximum number
3308 * of bytes. When doing hardware scatter/gather, each entry cannot
3309 * be larger than 64 KiB though.
3311 if (host
->flags
& SDHCI_USE_ADMA
) {
3312 if (host
->quirks
& SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC
)
3313 mmc
->max_seg_size
= 65535;
3315 mmc
->max_seg_size
= 65536;
3317 mmc
->max_seg_size
= mmc
->max_req_size
;
3321 * Maximum block size. This varies from controller to controller and
3322 * is specified in the capabilities register.
3324 if (host
->quirks
& SDHCI_QUIRK_FORCE_BLK_SZ_2048
) {
3325 mmc
->max_blk_size
= 2;
3327 mmc
->max_blk_size
= (caps
[0] & SDHCI_MAX_BLOCK_MASK
) >>
3328 SDHCI_MAX_BLOCK_SHIFT
;
3329 if (mmc
->max_blk_size
>= 3) {
3330 pr_warn("%s: Invalid maximum block size, assuming 512 bytes\n",
3332 mmc
->max_blk_size
= 0;
3336 mmc
->max_blk_size
= 512 << mmc
->max_blk_size
;
3339 * Maximum block count.
3341 mmc
->max_blk_count
= (host
->quirks
& SDHCI_QUIRK_NO_MULTIBLOCK
) ? 1 : 65535;
3346 tasklet_init(&host
->finish_tasklet
,
3347 sdhci_tasklet_finish
, (unsigned long)host
);
3349 setup_timer(&host
->timer
, sdhci_timeout_timer
, (unsigned long)host
);
3351 init_waitqueue_head(&host
->buf_ready_int
);
3353 sdhci_init(host
, 0);
3355 ret
= request_threaded_irq(host
->irq
, sdhci_irq
, sdhci_thread_irq
,
3356 IRQF_SHARED
, mmc_hostname(mmc
), host
);
3358 pr_err("%s: Failed to request IRQ %d: %d\n",
3359 mmc_hostname(mmc
), host
->irq
, ret
);
3363 #ifdef CONFIG_MMC_DEBUG
3364 sdhci_dumpregs(host
);
3367 #ifdef SDHCI_USE_LEDS_CLASS
3368 snprintf(host
->led_name
, sizeof(host
->led_name
),
3369 "%s::", mmc_hostname(mmc
));
3370 host
->led
.name
= host
->led_name
;
3371 host
->led
.brightness
= LED_OFF
;
3372 host
->led
.default_trigger
= mmc_hostname(mmc
);
3373 host
->led
.brightness_set
= sdhci_led_control
;
3375 ret
= led_classdev_register(mmc_dev(mmc
), &host
->led
);
3377 pr_err("%s: Failed to register LED device: %d\n",
3378 mmc_hostname(mmc
), ret
);
3387 pr_info("%s: SDHCI controller on %s [%s] using %s\n",
3388 mmc_hostname(mmc
), host
->hw_name
, dev_name(mmc_dev(mmc
)),
3389 (host
->flags
& SDHCI_USE_ADMA
) ?
3390 (host
->flags
& SDHCI_USE_64_BIT_DMA
) ? "ADMA 64-bit" : "ADMA" :
3391 (host
->flags
& SDHCI_USE_SDMA
) ? "DMA" : "PIO");
3393 sdhci_enable_card_detection(host
);
3397 #ifdef SDHCI_USE_LEDS_CLASS
3399 sdhci_do_reset(host
, SDHCI_RESET_ALL
);
3400 sdhci_writel(host
, 0, SDHCI_INT_ENABLE
);
3401 sdhci_writel(host
, 0, SDHCI_SIGNAL_ENABLE
);
3402 free_irq(host
->irq
, host
);
3405 tasklet_kill(&host
->finish_tasklet
);
3410 EXPORT_SYMBOL_GPL(sdhci_add_host
);
3412 void sdhci_remove_host(struct sdhci_host
*host
, int dead
)
3414 struct mmc_host
*mmc
= host
->mmc
;
3415 unsigned long flags
;
3418 spin_lock_irqsave(&host
->lock
, flags
);
3420 host
->flags
|= SDHCI_DEVICE_DEAD
;
3423 pr_err("%s: Controller removed during "
3424 " transfer!\n", mmc_hostname(mmc
));
3426 host
->mrq
->cmd
->error
= -ENOMEDIUM
;
3427 tasklet_schedule(&host
->finish_tasklet
);
3430 spin_unlock_irqrestore(&host
->lock
, flags
);
3433 sdhci_disable_card_detection(host
);
3435 mmc_remove_host(mmc
);
3437 #ifdef SDHCI_USE_LEDS_CLASS
3438 led_classdev_unregister(&host
->led
);
3442 sdhci_do_reset(host
, SDHCI_RESET_ALL
);
3444 sdhci_writel(host
, 0, SDHCI_INT_ENABLE
);
3445 sdhci_writel(host
, 0, SDHCI_SIGNAL_ENABLE
);
3446 free_irq(host
->irq
, host
);
3448 del_timer_sync(&host
->timer
);
3450 tasklet_kill(&host
->finish_tasklet
);
3452 if (!IS_ERR(mmc
->supply
.vqmmc
))
3453 regulator_disable(mmc
->supply
.vqmmc
);
3455 if (host
->adma_table
)
3456 dma_free_coherent(mmc_dev(mmc
), host
->adma_table_sz
,
3457 host
->adma_table
, host
->adma_addr
);
3458 kfree(host
->align_buffer
);
3460 host
->adma_table
= NULL
;
3461 host
->align_buffer
= NULL
;
3464 EXPORT_SYMBOL_GPL(sdhci_remove_host
);
3466 void sdhci_free_host(struct sdhci_host
*host
)
3468 mmc_free_host(host
->mmc
);
3471 EXPORT_SYMBOL_GPL(sdhci_free_host
);
3473 /*****************************************************************************\
3475 * Driver init/exit *
3477 \*****************************************************************************/
3479 static int __init
sdhci_drv_init(void)
3482 ": Secure Digital Host Controller Interface driver\n");
3483 pr_info(DRIVER_NAME
": Copyright(c) Pierre Ossman\n");
3488 static void __exit
sdhci_drv_exit(void)
3492 module_init(sdhci_drv_init
);
3493 module_exit(sdhci_drv_exit
);
3495 module_param(debug_quirks
, uint
, 0444);
3496 module_param(debug_quirks2
, uint
, 0444);
3498 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
3499 MODULE_DESCRIPTION("Secure Digital Host Controller Interface core driver");
3500 MODULE_LICENSE("GPL");
3502 MODULE_PARM_DESC(debug_quirks
, "Force certain quirks.");
3503 MODULE_PARM_DESC(debug_quirks2
, "Force certain other quirks.");