2 * linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
4 * Copyright (C) 2005-2006 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.
12 #include <linux/delay.h>
13 #include <linux/highmem.h>
14 #include <linux/pci.h>
15 #include <linux/dma-mapping.h>
17 #include <linux/mmc/host.h>
18 #include <linux/mmc/protocol.h>
20 #include <asm/scatterlist.h>
24 #define DRIVER_NAME "sdhci"
25 #define DRIVER_VERSION "0.12"
27 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
29 #define DBG(f, x...) \
30 pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
32 static unsigned int debug_nodma
= 0;
33 static unsigned int debug_forcedma
= 0;
34 static unsigned int debug_quirks
= 0;
36 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
37 #define SDHCI_QUIRK_FORCE_DMA (1<<1)
39 static const struct pci_device_id pci_ids
[] __devinitdata
= {
41 .vendor
= PCI_VENDOR_ID_RICOH
,
42 .device
= PCI_DEVICE_ID_RICOH_R5C822
,
43 .subvendor
= PCI_VENDOR_ID_IBM
,
44 .subdevice
= PCI_ANY_ID
,
45 .driver_data
= SDHCI_QUIRK_CLOCK_BEFORE_RESET
|
46 SDHCI_QUIRK_FORCE_DMA
,
50 .vendor
= PCI_VENDOR_ID_RICOH
,
51 .device
= PCI_DEVICE_ID_RICOH_R5C822
,
52 .subvendor
= PCI_ANY_ID
,
53 .subdevice
= PCI_ANY_ID
,
54 .driver_data
= SDHCI_QUIRK_FORCE_DMA
,
58 .vendor
= PCI_VENDOR_ID_TI
,
59 .device
= PCI_DEVICE_ID_TI_XX21_XX11_SD
,
60 .subvendor
= PCI_ANY_ID
,
61 .subdevice
= PCI_ANY_ID
,
62 .driver_data
= SDHCI_QUIRK_FORCE_DMA
,
65 { /* Generic SD host controller */
66 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI
<< 8), 0xFFFF00)
69 { /* end: all zeroes */ },
72 MODULE_DEVICE_TABLE(pci
, pci_ids
);
74 static void sdhci_prepare_data(struct sdhci_host
*, struct mmc_data
*);
75 static void sdhci_finish_data(struct sdhci_host
*);
77 static void sdhci_send_command(struct sdhci_host
*, struct mmc_command
*);
78 static void sdhci_finish_command(struct sdhci_host
*);
80 static void sdhci_dumpregs(struct sdhci_host
*host
)
82 printk(KERN_DEBUG DRIVER_NAME
": ============== REGISTER DUMP ==============\n");
84 printk(KERN_DEBUG DRIVER_NAME
": Sys addr: 0x%08x | Version: 0x%08x\n",
85 readl(host
->ioaddr
+ SDHCI_DMA_ADDRESS
),
86 readw(host
->ioaddr
+ SDHCI_HOST_VERSION
));
87 printk(KERN_DEBUG DRIVER_NAME
": Blk size: 0x%08x | Blk cnt: 0x%08x\n",
88 readw(host
->ioaddr
+ SDHCI_BLOCK_SIZE
),
89 readw(host
->ioaddr
+ SDHCI_BLOCK_COUNT
));
90 printk(KERN_DEBUG DRIVER_NAME
": Argument: 0x%08x | Trn mode: 0x%08x\n",
91 readl(host
->ioaddr
+ SDHCI_ARGUMENT
),
92 readw(host
->ioaddr
+ SDHCI_TRANSFER_MODE
));
93 printk(KERN_DEBUG DRIVER_NAME
": Present: 0x%08x | Host ctl: 0x%08x\n",
94 readl(host
->ioaddr
+ SDHCI_PRESENT_STATE
),
95 readb(host
->ioaddr
+ SDHCI_HOST_CONTROL
));
96 printk(KERN_DEBUG DRIVER_NAME
": Power: 0x%08x | Blk gap: 0x%08x\n",
97 readb(host
->ioaddr
+ SDHCI_POWER_CONTROL
),
98 readb(host
->ioaddr
+ SDHCI_BLOCK_GAP_CONTROL
));
99 printk(KERN_DEBUG DRIVER_NAME
": Wake-up: 0x%08x | Clock: 0x%08x\n",
100 readb(host
->ioaddr
+ SDHCI_WALK_UP_CONTROL
),
101 readw(host
->ioaddr
+ SDHCI_CLOCK_CONTROL
));
102 printk(KERN_DEBUG DRIVER_NAME
": Timeout: 0x%08x | Int stat: 0x%08x\n",
103 readb(host
->ioaddr
+ SDHCI_TIMEOUT_CONTROL
),
104 readl(host
->ioaddr
+ SDHCI_INT_STATUS
));
105 printk(KERN_DEBUG DRIVER_NAME
": Int enab: 0x%08x | Sig enab: 0x%08x\n",
106 readl(host
->ioaddr
+ SDHCI_INT_ENABLE
),
107 readl(host
->ioaddr
+ SDHCI_SIGNAL_ENABLE
));
108 printk(KERN_DEBUG DRIVER_NAME
": AC12 err: 0x%08x | Slot int: 0x%08x\n",
109 readw(host
->ioaddr
+ SDHCI_ACMD12_ERR
),
110 readw(host
->ioaddr
+ SDHCI_SLOT_INT_STATUS
));
111 printk(KERN_DEBUG DRIVER_NAME
": Caps: 0x%08x | Max curr: 0x%08x\n",
112 readl(host
->ioaddr
+ SDHCI_CAPABILITIES
),
113 readl(host
->ioaddr
+ SDHCI_MAX_CURRENT
));
115 printk(KERN_DEBUG DRIVER_NAME
": ===========================================\n");
118 /*****************************************************************************\
120 * Low level functions *
122 \*****************************************************************************/
124 static void sdhci_reset(struct sdhci_host
*host
, u8 mask
)
126 unsigned long timeout
;
128 writeb(mask
, host
->ioaddr
+ SDHCI_SOFTWARE_RESET
);
130 if (mask
& SDHCI_RESET_ALL
)
133 /* Wait max 100 ms */
136 /* hw clears the bit when it's done */
137 while (readb(host
->ioaddr
+ SDHCI_SOFTWARE_RESET
) & mask
) {
139 printk(KERN_ERR
"%s: Reset 0x%x never completed. "
140 "Please report this to " BUGMAIL
".\n",
141 mmc_hostname(host
->mmc
), (int)mask
);
142 sdhci_dumpregs(host
);
150 static void sdhci_init(struct sdhci_host
*host
)
154 sdhci_reset(host
, SDHCI_RESET_ALL
);
156 intmask
= SDHCI_INT_BUS_POWER
| SDHCI_INT_DATA_END_BIT
|
157 SDHCI_INT_DATA_CRC
| SDHCI_INT_DATA_TIMEOUT
| SDHCI_INT_INDEX
|
158 SDHCI_INT_END_BIT
| SDHCI_INT_CRC
| SDHCI_INT_TIMEOUT
|
159 SDHCI_INT_CARD_REMOVE
| SDHCI_INT_CARD_INSERT
|
160 SDHCI_INT_DATA_AVAIL
| SDHCI_INT_SPACE_AVAIL
|
161 SDHCI_INT_DMA_END
| SDHCI_INT_DATA_END
| SDHCI_INT_RESPONSE
;
163 writel(intmask
, host
->ioaddr
+ SDHCI_INT_ENABLE
);
164 writel(intmask
, host
->ioaddr
+ SDHCI_SIGNAL_ENABLE
);
167 static void sdhci_activate_led(struct sdhci_host
*host
)
171 ctrl
= readb(host
->ioaddr
+ SDHCI_HOST_CONTROL
);
172 ctrl
|= SDHCI_CTRL_LED
;
173 writeb(ctrl
, host
->ioaddr
+ SDHCI_HOST_CONTROL
);
176 static void sdhci_deactivate_led(struct sdhci_host
*host
)
180 ctrl
= readb(host
->ioaddr
+ SDHCI_HOST_CONTROL
);
181 ctrl
&= ~SDHCI_CTRL_LED
;
182 writeb(ctrl
, host
->ioaddr
+ SDHCI_HOST_CONTROL
);
185 /*****************************************************************************\
189 \*****************************************************************************/
191 static inline char* sdhci_kmap_sg(struct sdhci_host
* host
)
193 host
->mapped_sg
= kmap_atomic(host
->cur_sg
->page
, KM_BIO_SRC_IRQ
);
194 return host
->mapped_sg
+ host
->cur_sg
->offset
;
197 static inline void sdhci_kunmap_sg(struct sdhci_host
* host
)
199 kunmap_atomic(host
->mapped_sg
, KM_BIO_SRC_IRQ
);
202 static inline int sdhci_next_sg(struct sdhci_host
* host
)
205 * Skip to next SG entry.
213 if (host
->num_sg
> 0) {
215 host
->remain
= host
->cur_sg
->length
;
221 static void sdhci_read_block_pio(struct sdhci_host
*host
)
223 int blksize
, chunk_remain
;
228 DBG("PIO reading\n");
230 blksize
= host
->data
->blksz
;
234 buffer
= sdhci_kmap_sg(host
) + host
->offset
;
237 if (chunk_remain
== 0) {
238 data
= readl(host
->ioaddr
+ SDHCI_BUFFER
);
239 chunk_remain
= min(blksize
, 4);
242 size
= min(host
->size
, host
->remain
);
243 size
= min(size
, chunk_remain
);
245 chunk_remain
-= size
;
247 host
->offset
+= size
;
248 host
->remain
-= size
;
251 *buffer
= data
& 0xFF;
257 if (host
->remain
== 0) {
258 sdhci_kunmap_sg(host
);
259 if (sdhci_next_sg(host
) == 0) {
260 BUG_ON(blksize
!= 0);
263 buffer
= sdhci_kmap_sg(host
);
267 sdhci_kunmap_sg(host
);
270 static void sdhci_write_block_pio(struct sdhci_host
*host
)
272 int blksize
, chunk_remain
;
277 DBG("PIO writing\n");
279 blksize
= host
->data
->blksz
;
284 buffer
= sdhci_kmap_sg(host
) + host
->offset
;
287 size
= min(host
->size
, host
->remain
);
288 size
= min(size
, chunk_remain
);
290 chunk_remain
-= size
;
292 host
->offset
+= size
;
293 host
->remain
-= size
;
297 data
|= (u32
)*buffer
<< 24;
302 if (chunk_remain
== 0) {
303 writel(data
, host
->ioaddr
+ SDHCI_BUFFER
);
304 chunk_remain
= min(blksize
, 4);
307 if (host
->remain
== 0) {
308 sdhci_kunmap_sg(host
);
309 if (sdhci_next_sg(host
) == 0) {
310 BUG_ON(blksize
!= 0);
313 buffer
= sdhci_kmap_sg(host
);
317 sdhci_kunmap_sg(host
);
320 static void sdhci_transfer_pio(struct sdhci_host
*host
)
329 if (host
->data
->flags
& MMC_DATA_READ
)
330 mask
= SDHCI_DATA_AVAILABLE
;
332 mask
= SDHCI_SPACE_AVAILABLE
;
334 while (readl(host
->ioaddr
+ SDHCI_PRESENT_STATE
) & mask
) {
335 if (host
->data
->flags
& MMC_DATA_READ
)
336 sdhci_read_block_pio(host
);
338 sdhci_write_block_pio(host
);
343 BUG_ON(host
->num_sg
== 0);
346 DBG("PIO transfer complete.\n");
349 static void sdhci_prepare_data(struct sdhci_host
*host
, struct mmc_data
*data
)
352 unsigned target_timeout
, current_timeout
;
359 DBG("blksz %04x blks %04x flags %08x\n",
360 data
->blksz
, data
->blocks
, data
->flags
);
361 DBG("tsac %d ms nsac %d clk\n",
362 data
->timeout_ns
/ 1000000, data
->timeout_clks
);
365 BUG_ON(data
->blksz
* data
->blocks
> 524288);
366 BUG_ON(data
->blksz
> host
->max_block
);
367 BUG_ON(data
->blocks
> 65535);
370 target_timeout
= data
->timeout_ns
/ 1000 +
371 data
->timeout_clks
/ host
->clock
;
374 * Figure out needed cycles.
375 * We do this in steps in order to fit inside a 32 bit int.
376 * The first step is the minimum timeout, which will have a
377 * minimum resolution of 6 bits:
378 * (1) 2^13*1000 > 2^22,
379 * (2) host->timeout_clk < 2^16
384 current_timeout
= (1 << 13) * 1000 / host
->timeout_clk
;
385 while (current_timeout
< target_timeout
) {
387 current_timeout
<<= 1;
393 printk(KERN_WARNING
"%s: Too large timeout requested!\n",
394 mmc_hostname(host
->mmc
));
398 writeb(count
, host
->ioaddr
+ SDHCI_TIMEOUT_CONTROL
);
400 if (host
->flags
& SDHCI_USE_DMA
) {
403 count
= pci_map_sg(host
->chip
->pdev
, data
->sg
, data
->sg_len
,
404 (data
->flags
& MMC_DATA_READ
)?PCI_DMA_FROMDEVICE
:PCI_DMA_TODEVICE
);
407 writel(sg_dma_address(data
->sg
), host
->ioaddr
+ SDHCI_DMA_ADDRESS
);
409 host
->size
= data
->blksz
* data
->blocks
;
411 host
->cur_sg
= data
->sg
;
412 host
->num_sg
= data
->sg_len
;
415 host
->remain
= host
->cur_sg
->length
;
418 /* We do not handle DMA boundaries, so set it to max (512 KiB) */
419 writew(SDHCI_MAKE_BLKSZ(7, data
->blksz
),
420 host
->ioaddr
+ SDHCI_BLOCK_SIZE
);
421 writew(data
->blocks
, host
->ioaddr
+ SDHCI_BLOCK_COUNT
);
424 static void sdhci_set_transfer_mode(struct sdhci_host
*host
,
425 struct mmc_data
*data
)
434 mode
= SDHCI_TRNS_BLK_CNT_EN
;
435 if (data
->blocks
> 1)
436 mode
|= SDHCI_TRNS_MULTI
;
437 if (data
->flags
& MMC_DATA_READ
)
438 mode
|= SDHCI_TRNS_READ
;
439 if (host
->flags
& SDHCI_USE_DMA
)
440 mode
|= SDHCI_TRNS_DMA
;
442 writew(mode
, host
->ioaddr
+ SDHCI_TRANSFER_MODE
);
445 static void sdhci_finish_data(struct sdhci_host
*host
)
447 struct mmc_data
*data
;
455 if (host
->flags
& SDHCI_USE_DMA
) {
456 pci_unmap_sg(host
->chip
->pdev
, data
->sg
, data
->sg_len
,
457 (data
->flags
& MMC_DATA_READ
)?PCI_DMA_FROMDEVICE
:PCI_DMA_TODEVICE
);
461 * Controller doesn't count down when in single block mode.
463 if ((data
->blocks
== 1) && (data
->error
== MMC_ERR_NONE
))
466 blocks
= readw(host
->ioaddr
+ SDHCI_BLOCK_COUNT
);
467 data
->bytes_xfered
= data
->blksz
* (data
->blocks
- blocks
);
469 if ((data
->error
== MMC_ERR_NONE
) && blocks
) {
470 printk(KERN_ERR
"%s: Controller signalled completion even "
471 "though there were blocks left. Please report this "
472 "to " BUGMAIL
".\n", mmc_hostname(host
->mmc
));
473 data
->error
= MMC_ERR_FAILED
;
474 } else if (host
->size
!= 0) {
475 printk(KERN_ERR
"%s: %d bytes were left untransferred. "
476 "Please report this to " BUGMAIL
".\n",
477 mmc_hostname(host
->mmc
), host
->size
);
478 data
->error
= MMC_ERR_FAILED
;
481 DBG("Ending data transfer (%d bytes)\n", data
->bytes_xfered
);
485 * The controller needs a reset of internal state machines
486 * upon error conditions.
488 if (data
->error
!= MMC_ERR_NONE
) {
489 sdhci_reset(host
, SDHCI_RESET_CMD
);
490 sdhci_reset(host
, SDHCI_RESET_DATA
);
493 sdhci_send_command(host
, data
->stop
);
495 tasklet_schedule(&host
->finish_tasklet
);
498 static void sdhci_send_command(struct sdhci_host
*host
, struct mmc_command
*cmd
)
502 unsigned long timeout
;
506 DBG("Sending cmd (%x)\n", cmd
->opcode
);
511 mask
= SDHCI_CMD_INHIBIT
;
512 if ((cmd
->data
!= NULL
) || (cmd
->flags
& MMC_RSP_BUSY
))
513 mask
|= SDHCI_DATA_INHIBIT
;
515 /* We shouldn't wait for data inihibit for stop commands, even
516 though they might use busy signaling */
517 if (host
->mrq
->data
&& (cmd
== host
->mrq
->data
->stop
))
518 mask
&= ~SDHCI_DATA_INHIBIT
;
520 while (readl(host
->ioaddr
+ SDHCI_PRESENT_STATE
) & mask
) {
522 printk(KERN_ERR
"%s: Controller never released "
523 "inhibit bit(s). Please report this to "
524 BUGMAIL
".\n", mmc_hostname(host
->mmc
));
525 sdhci_dumpregs(host
);
526 cmd
->error
= MMC_ERR_FAILED
;
527 tasklet_schedule(&host
->finish_tasklet
);
534 mod_timer(&host
->timer
, jiffies
+ 10 * HZ
);
538 sdhci_prepare_data(host
, cmd
->data
);
540 writel(cmd
->arg
, host
->ioaddr
+ SDHCI_ARGUMENT
);
542 sdhci_set_transfer_mode(host
, cmd
->data
);
544 if ((cmd
->flags
& MMC_RSP_136
) && (cmd
->flags
& MMC_RSP_BUSY
)) {
545 printk(KERN_ERR
"%s: Unsupported response type! "
546 "Please report this to " BUGMAIL
".\n",
547 mmc_hostname(host
->mmc
));
548 cmd
->error
= MMC_ERR_INVALID
;
549 tasklet_schedule(&host
->finish_tasklet
);
553 if (!(cmd
->flags
& MMC_RSP_PRESENT
))
554 flags
= SDHCI_CMD_RESP_NONE
;
555 else if (cmd
->flags
& MMC_RSP_136
)
556 flags
= SDHCI_CMD_RESP_LONG
;
557 else if (cmd
->flags
& MMC_RSP_BUSY
)
558 flags
= SDHCI_CMD_RESP_SHORT_BUSY
;
560 flags
= SDHCI_CMD_RESP_SHORT
;
562 if (cmd
->flags
& MMC_RSP_CRC
)
563 flags
|= SDHCI_CMD_CRC
;
564 if (cmd
->flags
& MMC_RSP_OPCODE
)
565 flags
|= SDHCI_CMD_INDEX
;
567 flags
|= SDHCI_CMD_DATA
;
569 writew(SDHCI_MAKE_CMD(cmd
->opcode
, flags
),
570 host
->ioaddr
+ SDHCI_COMMAND
);
573 static void sdhci_finish_command(struct sdhci_host
*host
)
577 BUG_ON(host
->cmd
== NULL
);
579 if (host
->cmd
->flags
& MMC_RSP_PRESENT
) {
580 if (host
->cmd
->flags
& MMC_RSP_136
) {
581 /* CRC is stripped so we need to do some shifting. */
582 for (i
= 0;i
< 4;i
++) {
583 host
->cmd
->resp
[i
] = readl(host
->ioaddr
+
584 SDHCI_RESPONSE
+ (3-i
)*4) << 8;
586 host
->cmd
->resp
[i
] |=
588 SDHCI_RESPONSE
+ (3-i
)*4-1);
591 host
->cmd
->resp
[0] = readl(host
->ioaddr
+ SDHCI_RESPONSE
);
595 host
->cmd
->error
= MMC_ERR_NONE
;
597 DBG("Ending cmd (%x)\n", host
->cmd
->opcode
);
600 host
->data
= host
->cmd
->data
;
602 tasklet_schedule(&host
->finish_tasklet
);
607 static void sdhci_set_clock(struct sdhci_host
*host
, unsigned int clock
)
611 unsigned long timeout
;
613 if (clock
== host
->clock
)
616 writew(0, host
->ioaddr
+ SDHCI_CLOCK_CONTROL
);
621 for (div
= 1;div
< 256;div
*= 2) {
622 if ((host
->max_clk
/ div
) <= clock
)
627 clk
= div
<< SDHCI_DIVIDER_SHIFT
;
628 clk
|= SDHCI_CLOCK_INT_EN
;
629 writew(clk
, host
->ioaddr
+ SDHCI_CLOCK_CONTROL
);
633 while (!((clk
= readw(host
->ioaddr
+ SDHCI_CLOCK_CONTROL
))
634 & SDHCI_CLOCK_INT_STABLE
)) {
636 printk(KERN_ERR
"%s: Internal clock never stabilised. "
637 "Please report this to " BUGMAIL
".\n",
638 mmc_hostname(host
->mmc
));
639 sdhci_dumpregs(host
);
646 clk
|= SDHCI_CLOCK_CARD_EN
;
647 writew(clk
, host
->ioaddr
+ SDHCI_CLOCK_CONTROL
);
653 static void sdhci_set_power(struct sdhci_host
*host
, unsigned short power
)
657 if (host
->power
== power
)
660 writeb(0, host
->ioaddr
+ SDHCI_POWER_CONTROL
);
662 if (power
== (unsigned short)-1)
665 pwr
= SDHCI_POWER_ON
;
671 pwr
|= SDHCI_POWER_180
;
676 pwr
|= SDHCI_POWER_300
;
681 pwr
|= SDHCI_POWER_330
;
687 writeb(pwr
, host
->ioaddr
+ SDHCI_POWER_CONTROL
);
693 /*****************************************************************************\
697 \*****************************************************************************/
699 static void sdhci_request(struct mmc_host
*mmc
, struct mmc_request
*mrq
)
701 struct sdhci_host
*host
;
704 host
= mmc_priv(mmc
);
706 spin_lock_irqsave(&host
->lock
, flags
);
708 WARN_ON(host
->mrq
!= NULL
);
710 sdhci_activate_led(host
);
714 if (!(readl(host
->ioaddr
+ SDHCI_PRESENT_STATE
) & SDHCI_CARD_PRESENT
)) {
715 host
->mrq
->cmd
->error
= MMC_ERR_TIMEOUT
;
716 tasklet_schedule(&host
->finish_tasklet
);
718 sdhci_send_command(host
, mrq
->cmd
);
720 spin_unlock_irqrestore(&host
->lock
, flags
);
723 static void sdhci_set_ios(struct mmc_host
*mmc
, struct mmc_ios
*ios
)
725 struct sdhci_host
*host
;
729 host
= mmc_priv(mmc
);
731 spin_lock_irqsave(&host
->lock
, flags
);
734 * Reset the chip on each power off.
735 * Should clear out any weird states.
737 if (ios
->power_mode
== MMC_POWER_OFF
) {
738 writel(0, host
->ioaddr
+ SDHCI_SIGNAL_ENABLE
);
742 sdhci_set_clock(host
, ios
->clock
);
744 if (ios
->power_mode
== MMC_POWER_OFF
)
745 sdhci_set_power(host
, -1);
747 sdhci_set_power(host
, ios
->vdd
);
749 ctrl
= readb(host
->ioaddr
+ SDHCI_HOST_CONTROL
);
750 if (ios
->bus_width
== MMC_BUS_WIDTH_4
)
751 ctrl
|= SDHCI_CTRL_4BITBUS
;
753 ctrl
&= ~SDHCI_CTRL_4BITBUS
;
754 writeb(ctrl
, host
->ioaddr
+ SDHCI_HOST_CONTROL
);
756 spin_unlock_irqrestore(&host
->lock
, flags
);
759 static int sdhci_get_ro(struct mmc_host
*mmc
)
761 struct sdhci_host
*host
;
765 host
= mmc_priv(mmc
);
767 spin_lock_irqsave(&host
->lock
, flags
);
769 present
= readl(host
->ioaddr
+ SDHCI_PRESENT_STATE
);
771 spin_unlock_irqrestore(&host
->lock
, flags
);
773 return !(present
& SDHCI_WRITE_PROTECT
);
776 static struct mmc_host_ops sdhci_ops
= {
777 .request
= sdhci_request
,
778 .set_ios
= sdhci_set_ios
,
779 .get_ro
= sdhci_get_ro
,
782 /*****************************************************************************\
786 \*****************************************************************************/
788 static void sdhci_tasklet_card(unsigned long param
)
790 struct sdhci_host
*host
;
793 host
= (struct sdhci_host
*)param
;
795 spin_lock_irqsave(&host
->lock
, flags
);
797 if (!(readl(host
->ioaddr
+ SDHCI_PRESENT_STATE
) & SDHCI_CARD_PRESENT
)) {
799 printk(KERN_ERR
"%s: Card removed during transfer!\n",
800 mmc_hostname(host
->mmc
));
801 printk(KERN_ERR
"%s: Resetting controller.\n",
802 mmc_hostname(host
->mmc
));
804 sdhci_reset(host
, SDHCI_RESET_CMD
);
805 sdhci_reset(host
, SDHCI_RESET_DATA
);
807 host
->mrq
->cmd
->error
= MMC_ERR_FAILED
;
808 tasklet_schedule(&host
->finish_tasklet
);
812 spin_unlock_irqrestore(&host
->lock
, flags
);
814 mmc_detect_change(host
->mmc
, msecs_to_jiffies(500));
817 static void sdhci_tasklet_finish(unsigned long param
)
819 struct sdhci_host
*host
;
821 struct mmc_request
*mrq
;
823 host
= (struct sdhci_host
*)param
;
825 spin_lock_irqsave(&host
->lock
, flags
);
827 del_timer(&host
->timer
);
831 DBG("Ending request, cmd (%x)\n", mrq
->cmd
->opcode
);
834 * The controller needs a reset of internal state machines
835 * upon error conditions.
837 if ((mrq
->cmd
->error
!= MMC_ERR_NONE
) ||
838 (mrq
->data
&& ((mrq
->data
->error
!= MMC_ERR_NONE
) ||
839 (mrq
->data
->stop
&& (mrq
->data
->stop
->error
!= MMC_ERR_NONE
))))) {
841 /* Some controllers need this kick or reset won't work here */
842 if (host
->chip
->quirks
& SDHCI_QUIRK_CLOCK_BEFORE_RESET
) {
845 /* This is to force an update */
848 sdhci_set_clock(host
, clock
);
851 /* Spec says we should do both at the same time, but Ricoh
852 controllers do not like that. */
853 sdhci_reset(host
, SDHCI_RESET_CMD
);
854 sdhci_reset(host
, SDHCI_RESET_DATA
);
861 sdhci_deactivate_led(host
);
863 spin_unlock_irqrestore(&host
->lock
, flags
);
865 mmc_request_done(host
->mmc
, mrq
);
868 static void sdhci_timeout_timer(unsigned long data
)
870 struct sdhci_host
*host
;
873 host
= (struct sdhci_host
*)data
;
875 spin_lock_irqsave(&host
->lock
, flags
);
878 printk(KERN_ERR
"%s: Timeout waiting for hardware interrupt. "
879 "Please report this to " BUGMAIL
".\n",
880 mmc_hostname(host
->mmc
));
881 sdhci_dumpregs(host
);
884 host
->data
->error
= MMC_ERR_TIMEOUT
;
885 sdhci_finish_data(host
);
888 host
->cmd
->error
= MMC_ERR_TIMEOUT
;
890 host
->mrq
->cmd
->error
= MMC_ERR_TIMEOUT
;
892 tasklet_schedule(&host
->finish_tasklet
);
896 spin_unlock_irqrestore(&host
->lock
, flags
);
899 /*****************************************************************************\
901 * Interrupt handling *
903 \*****************************************************************************/
905 static void sdhci_cmd_irq(struct sdhci_host
*host
, u32 intmask
)
907 BUG_ON(intmask
== 0);
910 printk(KERN_ERR
"%s: Got command interrupt even though no "
911 "command operation was in progress.\n",
912 mmc_hostname(host
->mmc
));
913 printk(KERN_ERR
"%s: Please report this to " BUGMAIL
".\n",
914 mmc_hostname(host
->mmc
));
915 sdhci_dumpregs(host
);
919 if (intmask
& SDHCI_INT_RESPONSE
)
920 sdhci_finish_command(host
);
922 if (intmask
& SDHCI_INT_TIMEOUT
)
923 host
->cmd
->error
= MMC_ERR_TIMEOUT
;
924 else if (intmask
& SDHCI_INT_CRC
)
925 host
->cmd
->error
= MMC_ERR_BADCRC
;
926 else if (intmask
& (SDHCI_INT_END_BIT
| SDHCI_INT_INDEX
))
927 host
->cmd
->error
= MMC_ERR_FAILED
;
929 host
->cmd
->error
= MMC_ERR_INVALID
;
931 tasklet_schedule(&host
->finish_tasklet
);
935 static void sdhci_data_irq(struct sdhci_host
*host
, u32 intmask
)
937 BUG_ON(intmask
== 0);
941 * A data end interrupt is sent together with the response
942 * for the stop command.
944 if (intmask
& SDHCI_INT_DATA_END
)
947 printk(KERN_ERR
"%s: Got data interrupt even though no "
948 "data operation was in progress.\n",
949 mmc_hostname(host
->mmc
));
950 printk(KERN_ERR
"%s: Please report this to " BUGMAIL
".\n",
951 mmc_hostname(host
->mmc
));
952 sdhci_dumpregs(host
);
957 if (intmask
& SDHCI_INT_DATA_TIMEOUT
)
958 host
->data
->error
= MMC_ERR_TIMEOUT
;
959 else if (intmask
& SDHCI_INT_DATA_CRC
)
960 host
->data
->error
= MMC_ERR_BADCRC
;
961 else if (intmask
& SDHCI_INT_DATA_END_BIT
)
962 host
->data
->error
= MMC_ERR_FAILED
;
964 if (host
->data
->error
!= MMC_ERR_NONE
)
965 sdhci_finish_data(host
);
967 if (intmask
& (SDHCI_INT_DATA_AVAIL
| SDHCI_INT_SPACE_AVAIL
))
968 sdhci_transfer_pio(host
);
970 if (intmask
& SDHCI_INT_DATA_END
)
971 sdhci_finish_data(host
);
975 static irqreturn_t
sdhci_irq(int irq
, void *dev_id
, struct pt_regs
*regs
)
978 struct sdhci_host
* host
= dev_id
;
981 spin_lock(&host
->lock
);
983 intmask
= readl(host
->ioaddr
+ SDHCI_INT_STATUS
);
990 DBG("*** %s got interrupt: 0x%08x\n", host
->slot_descr
, intmask
);
992 if (intmask
& (SDHCI_INT_CARD_INSERT
| SDHCI_INT_CARD_REMOVE
)) {
993 writel(intmask
& (SDHCI_INT_CARD_INSERT
| SDHCI_INT_CARD_REMOVE
),
994 host
->ioaddr
+ SDHCI_INT_STATUS
);
995 tasklet_schedule(&host
->card_tasklet
);
998 intmask
&= ~(SDHCI_INT_CARD_INSERT
| SDHCI_INT_CARD_REMOVE
);
1000 if (intmask
& SDHCI_INT_CMD_MASK
) {
1001 writel(intmask
& SDHCI_INT_CMD_MASK
,
1002 host
->ioaddr
+ SDHCI_INT_STATUS
);
1003 sdhci_cmd_irq(host
, intmask
& SDHCI_INT_CMD_MASK
);
1006 if (intmask
& SDHCI_INT_DATA_MASK
) {
1007 writel(intmask
& SDHCI_INT_DATA_MASK
,
1008 host
->ioaddr
+ SDHCI_INT_STATUS
);
1009 sdhci_data_irq(host
, intmask
& SDHCI_INT_DATA_MASK
);
1012 intmask
&= ~(SDHCI_INT_CMD_MASK
| SDHCI_INT_DATA_MASK
);
1014 if (intmask
& SDHCI_INT_BUS_POWER
) {
1015 printk(KERN_ERR
"%s: Card is consuming too much power!\n",
1016 mmc_hostname(host
->mmc
));
1017 writel(SDHCI_INT_BUS_POWER
, host
->ioaddr
+ SDHCI_INT_STATUS
);
1020 intmask
&= SDHCI_INT_BUS_POWER
;
1023 printk(KERN_ERR
"%s: Unexpected interrupt 0x%08x. Please "
1024 "report this to " BUGMAIL
".\n",
1025 mmc_hostname(host
->mmc
), intmask
);
1026 sdhci_dumpregs(host
);
1028 writel(intmask
, host
->ioaddr
+ SDHCI_INT_STATUS
);
1031 result
= IRQ_HANDLED
;
1034 spin_unlock(&host
->lock
);
1039 /*****************************************************************************\
1043 \*****************************************************************************/
1047 static int sdhci_suspend (struct pci_dev
*pdev
, pm_message_t state
)
1049 struct sdhci_chip
*chip
;
1052 chip
= pci_get_drvdata(pdev
);
1056 DBG("Suspending...\n");
1058 for (i
= 0;i
< chip
->num_slots
;i
++) {
1059 if (!chip
->hosts
[i
])
1061 ret
= mmc_suspend_host(chip
->hosts
[i
]->mmc
, state
);
1063 for (i
--;i
>= 0;i
--)
1064 mmc_resume_host(chip
->hosts
[i
]->mmc
);
1069 pci_save_state(pdev
);
1070 pci_enable_wake(pdev
, pci_choose_state(pdev
, state
), 0);
1071 pci_disable_device(pdev
);
1072 pci_set_power_state(pdev
, pci_choose_state(pdev
, state
));
1077 static int sdhci_resume (struct pci_dev
*pdev
)
1079 struct sdhci_chip
*chip
;
1082 chip
= pci_get_drvdata(pdev
);
1086 DBG("Resuming...\n");
1088 pci_set_power_state(pdev
, PCI_D0
);
1089 pci_restore_state(pdev
);
1090 pci_enable_device(pdev
);
1092 for (i
= 0;i
< chip
->num_slots
;i
++) {
1093 if (!chip
->hosts
[i
])
1095 if (chip
->hosts
[i
]->flags
& SDHCI_USE_DMA
)
1096 pci_set_master(pdev
);
1097 sdhci_init(chip
->hosts
[i
]);
1098 ret
= mmc_resume_host(chip
->hosts
[i
]->mmc
);
1106 #else /* CONFIG_PM */
1108 #define sdhci_suspend NULL
1109 #define sdhci_resume NULL
1111 #endif /* CONFIG_PM */
1113 /*****************************************************************************\
1115 * Device probing/removal *
1117 \*****************************************************************************/
1119 static int __devinit
sdhci_probe_slot(struct pci_dev
*pdev
, int slot
)
1122 unsigned int version
;
1123 struct sdhci_chip
*chip
;
1124 struct mmc_host
*mmc
;
1125 struct sdhci_host
*host
;
1130 chip
= pci_get_drvdata(pdev
);
1133 ret
= pci_read_config_byte(pdev
, PCI_SLOT_INFO
, &first_bar
);
1137 first_bar
&= PCI_SLOT_INFO_FIRST_BAR_MASK
;
1139 if (first_bar
> 5) {
1140 printk(KERN_ERR DRIVER_NAME
": Invalid first BAR. Aborting.\n");
1144 if (!(pci_resource_flags(pdev
, first_bar
+ slot
) & IORESOURCE_MEM
)) {
1145 printk(KERN_ERR DRIVER_NAME
": BAR is not iomem. Aborting.\n");
1149 if (pci_resource_len(pdev
, first_bar
+ slot
) != 0x100) {
1150 printk(KERN_ERR DRIVER_NAME
": Invalid iomem size. Aborting.\n");
1154 if ((pdev
->class & 0x0000FF) == PCI_SDHCI_IFVENDOR
) {
1155 printk(KERN_ERR DRIVER_NAME
": Vendor specific interface. Aborting.\n");
1159 if ((pdev
->class & 0x0000FF) > PCI_SDHCI_IFVENDOR
) {
1160 printk(KERN_ERR DRIVER_NAME
": Unknown interface. Aborting.\n");
1164 mmc
= mmc_alloc_host(sizeof(struct sdhci_host
), &pdev
->dev
);
1168 host
= mmc_priv(mmc
);
1171 host
->bar
= first_bar
+ slot
;
1173 host
->addr
= pci_resource_start(pdev
, host
->bar
);
1174 host
->irq
= pdev
->irq
;
1176 DBG("slot %d at 0x%08lx, irq %d\n", slot
, host
->addr
, host
->irq
);
1178 snprintf(host
->slot_descr
, 20, "sdhci:slot%d", slot
);
1180 ret
= pci_request_region(pdev
, host
->bar
, host
->slot_descr
);
1184 host
->ioaddr
= ioremap_nocache(host
->addr
,
1185 pci_resource_len(pdev
, host
->bar
));
1186 if (!host
->ioaddr
) {
1191 sdhci_reset(host
, SDHCI_RESET_ALL
);
1193 version
= readw(host
->ioaddr
+ SDHCI_HOST_VERSION
);
1194 version
= (version
& SDHCI_SPEC_VER_MASK
) >> SDHCI_SPEC_VER_SHIFT
;
1196 printk(KERN_ERR
"%s: Unknown controller version (%d). "
1197 "You may experience problems.\n", host
->slot_descr
,
1201 caps
= readl(host
->ioaddr
+ SDHCI_CAPABILITIES
);
1204 DBG("DMA forced off\n");
1205 else if (debug_forcedma
) {
1206 DBG("DMA forced on\n");
1207 host
->flags
|= SDHCI_USE_DMA
;
1208 } else if (chip
->quirks
& SDHCI_QUIRK_FORCE_DMA
)
1209 host
->flags
|= SDHCI_USE_DMA
;
1210 else if ((pdev
->class & 0x0000FF) != PCI_SDHCI_IFDMA
)
1211 DBG("Controller doesn't have DMA interface\n");
1212 else if (!(caps
& SDHCI_CAN_DO_DMA
))
1213 DBG("Controller doesn't have DMA capability\n");
1215 host
->flags
|= SDHCI_USE_DMA
;
1217 if (host
->flags
& SDHCI_USE_DMA
) {
1218 if (pci_set_dma_mask(pdev
, DMA_32BIT_MASK
)) {
1219 printk(KERN_WARNING
"%s: No suitable DMA available. "
1220 "Falling back to PIO.\n", host
->slot_descr
);
1221 host
->flags
&= ~SDHCI_USE_DMA
;
1225 if (host
->flags
& SDHCI_USE_DMA
)
1226 pci_set_master(pdev
);
1227 else /* XXX: Hack to get MMC layer to avoid highmem */
1231 (caps
& SDHCI_CLOCK_BASE_MASK
) >> SDHCI_CLOCK_BASE_SHIFT
;
1232 if (host
->max_clk
== 0) {
1233 printk(KERN_ERR
"%s: Hardware doesn't specify base clock "
1234 "frequency.\n", host
->slot_descr
);
1238 host
->max_clk
*= 1000000;
1241 (caps
& SDHCI_TIMEOUT_CLK_MASK
) >> SDHCI_TIMEOUT_CLK_SHIFT
;
1242 if (host
->timeout_clk
== 0) {
1243 printk(KERN_ERR
"%s: Hardware doesn't specify timeout clock "
1244 "frequency.\n", host
->slot_descr
);
1248 if (caps
& SDHCI_TIMEOUT_CLK_UNIT
)
1249 host
->timeout_clk
*= 1000;
1251 host
->max_block
= (caps
& SDHCI_MAX_BLOCK_MASK
) >> SDHCI_MAX_BLOCK_SHIFT
;
1252 if (host
->max_block
>= 3) {
1253 printk(KERN_ERR
"%s: Invalid maximum block size.\n",
1258 host
->max_block
= 512 << host
->max_block
;
1261 * Set host parameters.
1263 mmc
->ops
= &sdhci_ops
;
1264 mmc
->f_min
= host
->max_clk
/ 256;
1265 mmc
->f_max
= host
->max_clk
;
1266 mmc
->caps
= MMC_CAP_4_BIT_DATA
| MMC_CAP_MULTIWRITE
| MMC_CAP_BYTEBLOCK
;
1269 if (caps
& SDHCI_CAN_VDD_330
)
1270 mmc
->ocr_avail
|= MMC_VDD_32_33
|MMC_VDD_33_34
;
1271 else if (caps
& SDHCI_CAN_VDD_300
)
1272 mmc
->ocr_avail
|= MMC_VDD_29_30
|MMC_VDD_30_31
;
1273 else if (caps
& SDHCI_CAN_VDD_180
)
1274 mmc
->ocr_avail
|= MMC_VDD_17_18
|MMC_VDD_18_19
;
1276 if (mmc
->ocr_avail
== 0) {
1277 printk(KERN_ERR
"%s: Hardware doesn't report any "
1278 "support voltages.\n", host
->slot_descr
);
1283 spin_lock_init(&host
->lock
);
1286 * Maximum number of segments. Hardware cannot do scatter lists.
1288 if (host
->flags
& SDHCI_USE_DMA
)
1289 mmc
->max_hw_segs
= 1;
1291 mmc
->max_hw_segs
= 16;
1292 mmc
->max_phys_segs
= 16;
1295 * Maximum number of sectors in one transfer. Limited by DMA boundary
1296 * size (512KiB), which means (512 KiB/512=) 1024 entries.
1298 mmc
->max_sectors
= 1024;
1301 * Maximum segment size. Could be one segment with the maximum number
1304 mmc
->max_seg_size
= mmc
->max_sectors
* 512;
1309 tasklet_init(&host
->card_tasklet
,
1310 sdhci_tasklet_card
, (unsigned long)host
);
1311 tasklet_init(&host
->finish_tasklet
,
1312 sdhci_tasklet_finish
, (unsigned long)host
);
1314 setup_timer(&host
->timer
, sdhci_timeout_timer
, (long)host
);
1316 ret
= request_irq(host
->irq
, sdhci_irq
, IRQF_SHARED
,
1317 host
->slot_descr
, host
);
1323 #ifdef CONFIG_MMC_DEBUG
1324 sdhci_dumpregs(host
);
1328 chip
->hosts
[slot
] = host
;
1332 printk(KERN_INFO
"%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc
),
1333 host
->addr
, host
->irq
,
1334 (host
->flags
& SDHCI_USE_DMA
)?"DMA":"PIO");
1339 tasklet_kill(&host
->card_tasklet
);
1340 tasklet_kill(&host
->finish_tasklet
);
1342 iounmap(host
->ioaddr
);
1344 pci_release_region(pdev
, host
->bar
);
1351 static void sdhci_remove_slot(struct pci_dev
*pdev
, int slot
)
1353 struct sdhci_chip
*chip
;
1354 struct mmc_host
*mmc
;
1355 struct sdhci_host
*host
;
1357 chip
= pci_get_drvdata(pdev
);
1358 host
= chip
->hosts
[slot
];
1361 chip
->hosts
[slot
] = NULL
;
1363 mmc_remove_host(mmc
);
1365 sdhci_reset(host
, SDHCI_RESET_ALL
);
1367 free_irq(host
->irq
, host
);
1369 del_timer_sync(&host
->timer
);
1371 tasklet_kill(&host
->card_tasklet
);
1372 tasklet_kill(&host
->finish_tasklet
);
1374 iounmap(host
->ioaddr
);
1376 pci_release_region(pdev
, host
->bar
);
1381 static int __devinit
sdhci_probe(struct pci_dev
*pdev
,
1382 const struct pci_device_id
*ent
)
1386 struct sdhci_chip
*chip
;
1388 BUG_ON(pdev
== NULL
);
1389 BUG_ON(ent
== NULL
);
1391 pci_read_config_byte(pdev
, PCI_CLASS_REVISION
, &rev
);
1393 printk(KERN_INFO DRIVER_NAME
1394 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1395 pci_name(pdev
), (int)pdev
->vendor
, (int)pdev
->device
,
1398 ret
= pci_read_config_byte(pdev
, PCI_SLOT_INFO
, &slots
);
1402 slots
= PCI_SLOT_INFO_SLOTS(slots
) + 1;
1403 DBG("found %d slot(s)\n", slots
);
1407 ret
= pci_enable_device(pdev
);
1411 chip
= kzalloc(sizeof(struct sdhci_chip
) +
1412 sizeof(struct sdhci_host
*) * slots
, GFP_KERNEL
);
1419 chip
->quirks
= ent
->driver_data
;
1422 chip
->quirks
= debug_quirks
;
1424 chip
->num_slots
= slots
;
1425 pci_set_drvdata(pdev
, chip
);
1427 for (i
= 0;i
< slots
;i
++) {
1428 ret
= sdhci_probe_slot(pdev
, i
);
1430 for (i
--;i
>= 0;i
--)
1431 sdhci_remove_slot(pdev
, i
);
1439 pci_set_drvdata(pdev
, NULL
);
1443 pci_disable_device(pdev
);
1447 static void __devexit
sdhci_remove(struct pci_dev
*pdev
)
1450 struct sdhci_chip
*chip
;
1452 chip
= pci_get_drvdata(pdev
);
1455 for (i
= 0;i
< chip
->num_slots
;i
++)
1456 sdhci_remove_slot(pdev
, i
);
1458 pci_set_drvdata(pdev
, NULL
);
1463 pci_disable_device(pdev
);
1466 static struct pci_driver sdhci_driver
= {
1467 .name
= DRIVER_NAME
,
1468 .id_table
= pci_ids
,
1469 .probe
= sdhci_probe
,
1470 .remove
= __devexit_p(sdhci_remove
),
1471 .suspend
= sdhci_suspend
,
1472 .resume
= sdhci_resume
,
1475 /*****************************************************************************\
1477 * Driver init/exit *
1479 \*****************************************************************************/
1481 static int __init
sdhci_drv_init(void)
1483 printk(KERN_INFO DRIVER_NAME
1484 ": Secure Digital Host Controller Interface driver, "
1485 DRIVER_VERSION
"\n");
1486 printk(KERN_INFO DRIVER_NAME
": Copyright(c) Pierre Ossman\n");
1488 return pci_register_driver(&sdhci_driver
);
1491 static void __exit
sdhci_drv_exit(void)
1495 pci_unregister_driver(&sdhci_driver
);
1498 module_init(sdhci_drv_init
);
1499 module_exit(sdhci_drv_exit
);
1501 module_param(debug_nodma
, uint
, 0444);
1502 module_param(debug_forcedma
, uint
, 0444);
1503 module_param(debug_quirks
, uint
, 0444);
1505 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1506 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1507 MODULE_VERSION(DRIVER_VERSION
);
1508 MODULE_LICENSE("GPL");
1510 MODULE_PARM_DESC(debug_nodma
, "Forcefully disable DMA transfers. (default 0)");
1511 MODULE_PARM_DESC(debug_forcedma
, "Forcefully enable DMA transfers. (default 0)");
1512 MODULE_PARM_DESC(debug_quirks
, "Force certain quirks.");