2 * Synopsys DesignWare Multimedia Card Interface driver
3 * (Based on NXP driver for lpc 31xx)
5 * Copyright (C) 2009 NXP Semiconductors
6 * Copyright (C) 2009, 2010 Imagination Technologies Ltd.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
14 #include <linux/blkdev.h>
15 #include <linux/clk.h>
16 #include <linux/debugfs.h>
17 #include <linux/device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/err.h>
20 #include <linux/init.h>
21 #include <linux/interrupt.h>
22 #include <linux/ioport.h>
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
25 #include <linux/seq_file.h>
26 #include <linux/slab.h>
27 #include <linux/stat.h>
28 #include <linux/delay.h>
29 #include <linux/irq.h>
30 #include <linux/mmc/host.h>
31 #include <linux/mmc/mmc.h>
32 #include <linux/mmc/dw_mmc.h>
33 #include <linux/bitops.h>
34 #include <linux/regulator/consumer.h>
35 #include <linux/workqueue.h>
37 #include <linux/of_gpio.h>
41 /* Common flag combinations */
42 #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DRTO | SDMMC_INT_DCRC | \
43 SDMMC_INT_HTO | SDMMC_INT_SBE | \
45 #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \
47 #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \
48 DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE)
49 #define DW_MCI_SEND_STATUS 1
50 #define DW_MCI_RECV_STATUS 2
51 #define DW_MCI_DMA_THRESHOLD 16
53 #ifdef CONFIG_MMC_DW_IDMAC
54 #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \
55 SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \
56 SDMMC_IDMAC_INT_FBE | SDMMC_IDMAC_INT_RI | \
60 u32 des0
; /* Control Descriptor */
61 #define IDMAC_DES0_DIC BIT(1)
62 #define IDMAC_DES0_LD BIT(2)
63 #define IDMAC_DES0_FD BIT(3)
64 #define IDMAC_DES0_CH BIT(4)
65 #define IDMAC_DES0_ER BIT(5)
66 #define IDMAC_DES0_CES BIT(30)
67 #define IDMAC_DES0_OWN BIT(31)
69 u32 des1
; /* Buffer sizes */
70 #define IDMAC_SET_BUFFER1_SIZE(d, s) \
71 ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff))
73 u32 des2
; /* buffer 1 physical address */
75 u32 des3
; /* buffer 2 physical address */
77 #endif /* CONFIG_MMC_DW_IDMAC */
80 * struct dw_mci_slot - MMC slot state
81 * @mmc: The mmc_host representing this slot.
82 * @host: The MMC controller this slot is using.
83 * @quirks: Slot-level quirks (DW_MCI_SLOT_QUIRK_XXX)
84 * @wp_gpio: If gpio_is_valid() we'll use this to read write protect.
85 * @ctype: Card type for this slot.
86 * @mrq: mmc_request currently being processed or waiting to be
87 * processed, or NULL when the slot is idle.
88 * @queue_node: List node for placing this node in the @queue list of
90 * @clock: Clock rate configured by set_ios(). Protected by host->lock.
91 * @flags: Random state bits associated with the slot.
92 * @id: Number of this slot.
93 * @last_detect_state: Most recently observed card detect state.
104 struct mmc_request
*mrq
;
105 struct list_head queue_node
;
109 #define DW_MMC_CARD_PRESENT 0
110 #define DW_MMC_CARD_NEED_INIT 1
112 int last_detect_state
;
115 #if defined(CONFIG_DEBUG_FS)
116 static int dw_mci_req_show(struct seq_file
*s
, void *v
)
118 struct dw_mci_slot
*slot
= s
->private;
119 struct mmc_request
*mrq
;
120 struct mmc_command
*cmd
;
121 struct mmc_command
*stop
;
122 struct mmc_data
*data
;
124 /* Make sure we get a consistent snapshot */
125 spin_lock_bh(&slot
->host
->lock
);
135 "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n",
136 cmd
->opcode
, cmd
->arg
, cmd
->flags
,
137 cmd
->resp
[0], cmd
->resp
[1], cmd
->resp
[2],
138 cmd
->resp
[2], cmd
->error
);
140 seq_printf(s
, "DATA %u / %u * %u flg %x err %d\n",
141 data
->bytes_xfered
, data
->blocks
,
142 data
->blksz
, data
->flags
, data
->error
);
145 "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n",
146 stop
->opcode
, stop
->arg
, stop
->flags
,
147 stop
->resp
[0], stop
->resp
[1], stop
->resp
[2],
148 stop
->resp
[2], stop
->error
);
151 spin_unlock_bh(&slot
->host
->lock
);
156 static int dw_mci_req_open(struct inode
*inode
, struct file
*file
)
158 return single_open(file
, dw_mci_req_show
, inode
->i_private
);
161 static const struct file_operations dw_mci_req_fops
= {
162 .owner
= THIS_MODULE
,
163 .open
= dw_mci_req_open
,
166 .release
= single_release
,
169 static int dw_mci_regs_show(struct seq_file
*s
, void *v
)
171 seq_printf(s
, "STATUS:\t0x%08x\n", SDMMC_STATUS
);
172 seq_printf(s
, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS
);
173 seq_printf(s
, "CMD:\t0x%08x\n", SDMMC_CMD
);
174 seq_printf(s
, "CTRL:\t0x%08x\n", SDMMC_CTRL
);
175 seq_printf(s
, "INTMASK:\t0x%08x\n", SDMMC_INTMASK
);
176 seq_printf(s
, "CLKENA:\t0x%08x\n", SDMMC_CLKENA
);
181 static int dw_mci_regs_open(struct inode
*inode
, struct file
*file
)
183 return single_open(file
, dw_mci_regs_show
, inode
->i_private
);
186 static const struct file_operations dw_mci_regs_fops
= {
187 .owner
= THIS_MODULE
,
188 .open
= dw_mci_regs_open
,
191 .release
= single_release
,
194 static void dw_mci_init_debugfs(struct dw_mci_slot
*slot
)
196 struct mmc_host
*mmc
= slot
->mmc
;
197 struct dw_mci
*host
= slot
->host
;
201 root
= mmc
->debugfs_root
;
205 node
= debugfs_create_file("regs", S_IRUSR
, root
, host
,
210 node
= debugfs_create_file("req", S_IRUSR
, root
, slot
,
215 node
= debugfs_create_u32("state", S_IRUSR
, root
, (u32
*)&host
->state
);
219 node
= debugfs_create_x32("pending_events", S_IRUSR
, root
,
220 (u32
*)&host
->pending_events
);
224 node
= debugfs_create_x32("completed_events", S_IRUSR
, root
,
225 (u32
*)&host
->completed_events
);
232 dev_err(&mmc
->class_dev
, "failed to initialize debugfs for slot\n");
234 #endif /* defined(CONFIG_DEBUG_FS) */
236 static void dw_mci_set_timeout(struct dw_mci
*host
)
238 /* timeout (maximum) */
239 mci_writel(host
, TMOUT
, 0xffffffff);
242 static u32
dw_mci_prepare_command(struct mmc_host
*mmc
, struct mmc_command
*cmd
)
244 struct mmc_data
*data
;
245 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
246 const struct dw_mci_drv_data
*drv_data
= slot
->host
->drv_data
;
248 cmd
->error
= -EINPROGRESS
;
252 if (cmdr
== MMC_STOP_TRANSMISSION
)
253 cmdr
|= SDMMC_CMD_STOP
;
255 cmdr
|= SDMMC_CMD_PRV_DAT_WAIT
;
257 if (cmd
->flags
& MMC_RSP_PRESENT
) {
258 /* We expect a response, so set this bit */
259 cmdr
|= SDMMC_CMD_RESP_EXP
;
260 if (cmd
->flags
& MMC_RSP_136
)
261 cmdr
|= SDMMC_CMD_RESP_LONG
;
264 if (cmd
->flags
& MMC_RSP_CRC
)
265 cmdr
|= SDMMC_CMD_RESP_CRC
;
269 cmdr
|= SDMMC_CMD_DAT_EXP
;
270 if (data
->flags
& MMC_DATA_STREAM
)
271 cmdr
|= SDMMC_CMD_STRM_MODE
;
272 if (data
->flags
& MMC_DATA_WRITE
)
273 cmdr
|= SDMMC_CMD_DAT_WR
;
276 if (drv_data
&& drv_data
->prepare_command
)
277 drv_data
->prepare_command(slot
->host
, &cmdr
);
282 static void dw_mci_start_command(struct dw_mci
*host
,
283 struct mmc_command
*cmd
, u32 cmd_flags
)
287 "start command: ARGR=0x%08x CMDR=0x%08x\n",
288 cmd
->arg
, cmd_flags
);
290 mci_writel(host
, CMDARG
, cmd
->arg
);
293 mci_writel(host
, CMD
, cmd_flags
| SDMMC_CMD_START
);
296 static void send_stop_cmd(struct dw_mci
*host
, struct mmc_data
*data
)
298 dw_mci_start_command(host
, data
->stop
, host
->stop_cmdr
);
301 /* DMA interface functions */
302 static void dw_mci_stop_dma(struct dw_mci
*host
)
304 if (host
->using_dma
) {
305 host
->dma_ops
->stop(host
);
306 host
->dma_ops
->cleanup(host
);
308 /* Data transfer was stopped by the interrupt handler */
309 set_bit(EVENT_XFER_COMPLETE
, &host
->pending_events
);
313 static int dw_mci_get_dma_dir(struct mmc_data
*data
)
315 if (data
->flags
& MMC_DATA_WRITE
)
316 return DMA_TO_DEVICE
;
318 return DMA_FROM_DEVICE
;
321 #ifdef CONFIG_MMC_DW_IDMAC
322 static void dw_mci_dma_cleanup(struct dw_mci
*host
)
324 struct mmc_data
*data
= host
->data
;
327 if (!data
->host_cookie
)
328 dma_unmap_sg(host
->dev
,
331 dw_mci_get_dma_dir(data
));
334 static void dw_mci_idmac_stop_dma(struct dw_mci
*host
)
338 /* Disable and reset the IDMAC interface */
339 temp
= mci_readl(host
, CTRL
);
340 temp
&= ~SDMMC_CTRL_USE_IDMAC
;
341 temp
|= SDMMC_CTRL_DMA_RESET
;
342 mci_writel(host
, CTRL
, temp
);
344 /* Stop the IDMAC running */
345 temp
= mci_readl(host
, BMOD
);
346 temp
&= ~(SDMMC_IDMAC_ENABLE
| SDMMC_IDMAC_FB
);
347 mci_writel(host
, BMOD
, temp
);
350 static void dw_mci_idmac_complete_dma(struct dw_mci
*host
)
352 struct mmc_data
*data
= host
->data
;
354 dev_vdbg(host
->dev
, "DMA complete\n");
356 host
->dma_ops
->cleanup(host
);
359 * If the card was removed, data will be NULL. No point in trying to
360 * send the stop command or waiting for NBUSY in this case.
363 set_bit(EVENT_XFER_COMPLETE
, &host
->pending_events
);
364 tasklet_schedule(&host
->tasklet
);
368 static void dw_mci_translate_sglist(struct dw_mci
*host
, struct mmc_data
*data
,
372 struct idmac_desc
*desc
= host
->sg_cpu
;
374 for (i
= 0; i
< sg_len
; i
++, desc
++) {
375 unsigned int length
= sg_dma_len(&data
->sg
[i
]);
376 u32 mem_addr
= sg_dma_address(&data
->sg
[i
]);
378 /* Set the OWN bit and disable interrupts for this descriptor */
379 desc
->des0
= IDMAC_DES0_OWN
| IDMAC_DES0_DIC
| IDMAC_DES0_CH
;
382 IDMAC_SET_BUFFER1_SIZE(desc
, length
);
384 /* Physical address to DMA to/from */
385 desc
->des2
= mem_addr
;
388 /* Set first descriptor */
390 desc
->des0
|= IDMAC_DES0_FD
;
392 /* Set last descriptor */
393 desc
= host
->sg_cpu
+ (i
- 1) * sizeof(struct idmac_desc
);
394 desc
->des0
&= ~(IDMAC_DES0_CH
| IDMAC_DES0_DIC
);
395 desc
->des0
|= IDMAC_DES0_LD
;
400 static void dw_mci_idmac_start_dma(struct dw_mci
*host
, unsigned int sg_len
)
404 dw_mci_translate_sglist(host
, host
->data
, sg_len
);
406 /* Select IDMAC interface */
407 temp
= mci_readl(host
, CTRL
);
408 temp
|= SDMMC_CTRL_USE_IDMAC
;
409 mci_writel(host
, CTRL
, temp
);
413 /* Enable the IDMAC */
414 temp
= mci_readl(host
, BMOD
);
415 temp
|= SDMMC_IDMAC_ENABLE
| SDMMC_IDMAC_FB
;
416 mci_writel(host
, BMOD
, temp
);
418 /* Start it running */
419 mci_writel(host
, PLDMND
, 1);
422 static int dw_mci_idmac_init(struct dw_mci
*host
)
424 struct idmac_desc
*p
;
427 /* Number of descriptors in the ring buffer */
428 host
->ring_size
= PAGE_SIZE
/ sizeof(struct idmac_desc
);
430 /* Forward link the descriptor list */
431 for (i
= 0, p
= host
->sg_cpu
; i
< host
->ring_size
- 1; i
++, p
++)
432 p
->des3
= host
->sg_dma
+ (sizeof(struct idmac_desc
) * (i
+ 1));
434 /* Set the last descriptor as the end-of-ring descriptor */
435 p
->des3
= host
->sg_dma
;
436 p
->des0
= IDMAC_DES0_ER
;
438 mci_writel(host
, BMOD
, SDMMC_IDMAC_SWRESET
);
440 /* Mask out interrupts - get Tx & Rx complete only */
441 mci_writel(host
, IDSTS
, IDMAC_INT_CLR
);
442 mci_writel(host
, IDINTEN
, SDMMC_IDMAC_INT_NI
| SDMMC_IDMAC_INT_RI
|
445 /* Set the descriptor base address */
446 mci_writel(host
, DBADDR
, host
->sg_dma
);
450 static const struct dw_mci_dma_ops dw_mci_idmac_ops
= {
451 .init
= dw_mci_idmac_init
,
452 .start
= dw_mci_idmac_start_dma
,
453 .stop
= dw_mci_idmac_stop_dma
,
454 .complete
= dw_mci_idmac_complete_dma
,
455 .cleanup
= dw_mci_dma_cleanup
,
457 #endif /* CONFIG_MMC_DW_IDMAC */
459 static int dw_mci_pre_dma_transfer(struct dw_mci
*host
,
460 struct mmc_data
*data
,
463 struct scatterlist
*sg
;
464 unsigned int i
, sg_len
;
466 if (!next
&& data
->host_cookie
)
467 return data
->host_cookie
;
470 * We don't do DMA on "complex" transfers, i.e. with
471 * non-word-aligned buffers or lengths. Also, we don't bother
472 * with all the DMA setup overhead for short transfers.
474 if (data
->blocks
* data
->blksz
< DW_MCI_DMA_THRESHOLD
)
480 for_each_sg(data
->sg
, sg
, data
->sg_len
, i
) {
481 if (sg
->offset
& 3 || sg
->length
& 3)
485 sg_len
= dma_map_sg(host
->dev
,
488 dw_mci_get_dma_dir(data
));
493 data
->host_cookie
= sg_len
;
498 static void dw_mci_pre_req(struct mmc_host
*mmc
,
499 struct mmc_request
*mrq
,
502 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
503 struct mmc_data
*data
= mrq
->data
;
505 if (!slot
->host
->use_dma
|| !data
)
508 if (data
->host_cookie
) {
509 data
->host_cookie
= 0;
513 if (dw_mci_pre_dma_transfer(slot
->host
, mrq
->data
, 1) < 0)
514 data
->host_cookie
= 0;
517 static void dw_mci_post_req(struct mmc_host
*mmc
,
518 struct mmc_request
*mrq
,
521 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
522 struct mmc_data
*data
= mrq
->data
;
524 if (!slot
->host
->use_dma
|| !data
)
527 if (data
->host_cookie
)
528 dma_unmap_sg(slot
->host
->dev
,
531 dw_mci_get_dma_dir(data
));
532 data
->host_cookie
= 0;
535 static int dw_mci_submit_data_dma(struct dw_mci
*host
, struct mmc_data
*data
)
542 /* If we don't have a channel, we can't do DMA */
546 sg_len
= dw_mci_pre_dma_transfer(host
, data
, 0);
548 host
->dma_ops
->stop(host
);
555 "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n",
556 (unsigned long)host
->sg_cpu
, (unsigned long)host
->sg_dma
,
559 /* Enable the DMA interface */
560 temp
= mci_readl(host
, CTRL
);
561 temp
|= SDMMC_CTRL_DMA_ENABLE
;
562 mci_writel(host
, CTRL
, temp
);
564 /* Disable RX/TX IRQs, let DMA handle it */
565 temp
= mci_readl(host
, INTMASK
);
566 temp
&= ~(SDMMC_INT_RXDR
| SDMMC_INT_TXDR
);
567 mci_writel(host
, INTMASK
, temp
);
569 host
->dma_ops
->start(host
, sg_len
);
574 static void dw_mci_submit_data(struct dw_mci
*host
, struct mmc_data
*data
)
578 data
->error
= -EINPROGRESS
;
584 if (data
->flags
& MMC_DATA_READ
)
585 host
->dir_status
= DW_MCI_RECV_STATUS
;
587 host
->dir_status
= DW_MCI_SEND_STATUS
;
589 if (dw_mci_submit_data_dma(host
, data
)) {
590 int flags
= SG_MITER_ATOMIC
;
591 if (host
->data
->flags
& MMC_DATA_READ
)
592 flags
|= SG_MITER_TO_SG
;
594 flags
|= SG_MITER_FROM_SG
;
596 sg_miter_start(&host
->sg_miter
, data
->sg
, data
->sg_len
, flags
);
598 host
->part_buf_start
= 0;
599 host
->part_buf_count
= 0;
601 mci_writel(host
, RINTSTS
, SDMMC_INT_TXDR
| SDMMC_INT_RXDR
);
602 temp
= mci_readl(host
, INTMASK
);
603 temp
|= SDMMC_INT_TXDR
| SDMMC_INT_RXDR
;
604 mci_writel(host
, INTMASK
, temp
);
606 temp
= mci_readl(host
, CTRL
);
607 temp
&= ~SDMMC_CTRL_DMA_ENABLE
;
608 mci_writel(host
, CTRL
, temp
);
612 static void mci_send_cmd(struct dw_mci_slot
*slot
, u32 cmd
, u32 arg
)
614 struct dw_mci
*host
= slot
->host
;
615 unsigned long timeout
= jiffies
+ msecs_to_jiffies(500);
616 unsigned int cmd_status
= 0;
618 mci_writel(host
, CMDARG
, arg
);
620 mci_writel(host
, CMD
, SDMMC_CMD_START
| cmd
);
622 while (time_before(jiffies
, timeout
)) {
623 cmd_status
= mci_readl(host
, CMD
);
624 if (!(cmd_status
& SDMMC_CMD_START
))
627 dev_err(&slot
->mmc
->class_dev
,
628 "Timeout sending command (cmd %#x arg %#x status %#x)\n",
629 cmd
, arg
, cmd_status
);
632 static void dw_mci_setup_bus(struct dw_mci_slot
*slot
, bool force_clkinit
)
634 struct dw_mci
*host
= slot
->host
;
638 if (slot
->clock
!= host
->current_speed
|| force_clkinit
) {
639 div
= host
->bus_hz
/ slot
->clock
;
640 if (host
->bus_hz
% slot
->clock
&& host
->bus_hz
> slot
->clock
)
642 * move the + 1 after the divide to prevent
643 * over-clocking the card.
647 div
= (host
->bus_hz
!= slot
->clock
) ? DIV_ROUND_UP(div
, 2) : 0;
649 dev_info(&slot
->mmc
->class_dev
,
650 "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ"
651 " div = %d)\n", slot
->id
, host
->bus_hz
, slot
->clock
,
652 div
? ((host
->bus_hz
/ div
) >> 1) : host
->bus_hz
, div
);
655 mci_writel(host
, CLKENA
, 0);
656 mci_writel(host
, CLKSRC
, 0);
660 SDMMC_CMD_UPD_CLK
| SDMMC_CMD_PRV_DAT_WAIT
, 0);
662 /* set clock to desired speed */
663 mci_writel(host
, CLKDIV
, div
);
667 SDMMC_CMD_UPD_CLK
| SDMMC_CMD_PRV_DAT_WAIT
, 0);
669 /* enable clock; only low power if no SDIO */
670 clk_en_a
= SDMMC_CLKEN_ENABLE
<< slot
->id
;
671 if (!(mci_readl(host
, INTMASK
) & SDMMC_INT_SDIO(slot
->id
)))
672 clk_en_a
|= SDMMC_CLKEN_LOW_PWR
<< slot
->id
;
673 mci_writel(host
, CLKENA
, clk_en_a
);
677 SDMMC_CMD_UPD_CLK
| SDMMC_CMD_PRV_DAT_WAIT
, 0);
679 host
->current_speed
= slot
->clock
;
682 /* Set the current slot bus width */
683 mci_writel(host
, CTYPE
, (slot
->ctype
<< slot
->id
));
686 static void __dw_mci_start_request(struct dw_mci
*host
,
687 struct dw_mci_slot
*slot
,
688 struct mmc_command
*cmd
)
690 struct mmc_request
*mrq
;
691 struct mmc_data
*data
;
695 if (host
->pdata
->select_slot
)
696 host
->pdata
->select_slot(slot
->id
);
698 host
->cur_slot
= slot
;
701 host
->pending_events
= 0;
702 host
->completed_events
= 0;
703 host
->data_status
= 0;
707 dw_mci_set_timeout(host
);
708 mci_writel(host
, BYTCNT
, data
->blksz
*data
->blocks
);
709 mci_writel(host
, BLKSIZ
, data
->blksz
);
712 cmdflags
= dw_mci_prepare_command(slot
->mmc
, cmd
);
714 /* this is the first command, send the initialization clock */
715 if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT
, &slot
->flags
))
716 cmdflags
|= SDMMC_CMD_INIT
;
719 dw_mci_submit_data(host
, data
);
723 dw_mci_start_command(host
, cmd
, cmdflags
);
726 host
->stop_cmdr
= dw_mci_prepare_command(slot
->mmc
, mrq
->stop
);
729 static void dw_mci_start_request(struct dw_mci
*host
,
730 struct dw_mci_slot
*slot
)
732 struct mmc_request
*mrq
= slot
->mrq
;
733 struct mmc_command
*cmd
;
735 cmd
= mrq
->sbc
? mrq
->sbc
: mrq
->cmd
;
736 __dw_mci_start_request(host
, slot
, cmd
);
739 /* must be called with host->lock held */
740 static void dw_mci_queue_request(struct dw_mci
*host
, struct dw_mci_slot
*slot
,
741 struct mmc_request
*mrq
)
743 dev_vdbg(&slot
->mmc
->class_dev
, "queue request: state=%d\n",
748 if (host
->state
== STATE_IDLE
) {
749 host
->state
= STATE_SENDING_CMD
;
750 dw_mci_start_request(host
, slot
);
752 list_add_tail(&slot
->queue_node
, &host
->queue
);
756 static void dw_mci_request(struct mmc_host
*mmc
, struct mmc_request
*mrq
)
758 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
759 struct dw_mci
*host
= slot
->host
;
764 * The check for card presence and queueing of the request must be
765 * atomic, otherwise the card could be removed in between and the
766 * request wouldn't fail until another card was inserted.
768 spin_lock_bh(&host
->lock
);
770 if (!test_bit(DW_MMC_CARD_PRESENT
, &slot
->flags
)) {
771 spin_unlock_bh(&host
->lock
);
772 mrq
->cmd
->error
= -ENOMEDIUM
;
773 mmc_request_done(mmc
, mrq
);
777 dw_mci_queue_request(host
, slot
, mrq
);
779 spin_unlock_bh(&host
->lock
);
782 static void dw_mci_set_ios(struct mmc_host
*mmc
, struct mmc_ios
*ios
)
784 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
785 const struct dw_mci_drv_data
*drv_data
= slot
->host
->drv_data
;
788 switch (ios
->bus_width
) {
789 case MMC_BUS_WIDTH_4
:
790 slot
->ctype
= SDMMC_CTYPE_4BIT
;
792 case MMC_BUS_WIDTH_8
:
793 slot
->ctype
= SDMMC_CTYPE_8BIT
;
796 /* set default 1 bit mode */
797 slot
->ctype
= SDMMC_CTYPE_1BIT
;
800 regs
= mci_readl(slot
->host
, UHS_REG
);
803 if (ios
->timing
== MMC_TIMING_UHS_DDR50
)
804 regs
|= ((0x1 << slot
->id
) << 16);
806 regs
&= ~((0x1 << slot
->id
) << 16);
808 mci_writel(slot
->host
, UHS_REG
, regs
);
812 * Use mirror of ios->clock to prevent race with mmc
813 * core ios update when finding the minimum.
815 slot
->clock
= ios
->clock
;
818 if (drv_data
&& drv_data
->set_ios
)
819 drv_data
->set_ios(slot
->host
, ios
);
821 /* Slot specific timing and width adjustment */
822 dw_mci_setup_bus(slot
, false);
824 switch (ios
->power_mode
) {
826 set_bit(DW_MMC_CARD_NEED_INIT
, &slot
->flags
);
828 if (slot
->host
->pdata
->setpower
)
829 slot
->host
->pdata
->setpower(slot
->id
, mmc
->ocr_avail
);
830 regs
= mci_readl(slot
->host
, PWREN
);
831 regs
|= (1 << slot
->id
);
832 mci_writel(slot
->host
, PWREN
, regs
);
835 /* Power down slot */
836 if (slot
->host
->pdata
->setpower
)
837 slot
->host
->pdata
->setpower(slot
->id
, 0);
838 regs
= mci_readl(slot
->host
, PWREN
);
839 regs
&= ~(1 << slot
->id
);
840 mci_writel(slot
->host
, PWREN
, regs
);
847 static int dw_mci_get_ro(struct mmc_host
*mmc
)
850 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
851 struct dw_mci_board
*brd
= slot
->host
->pdata
;
853 /* Use platform get_ro function, else try on board write protect */
854 if (slot
->quirks
& DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT
)
856 else if (brd
->get_ro
)
857 read_only
= brd
->get_ro(slot
->id
);
858 else if (gpio_is_valid(slot
->wp_gpio
))
859 read_only
= gpio_get_value(slot
->wp_gpio
);
862 mci_readl(slot
->host
, WRTPRT
) & (1 << slot
->id
) ? 1 : 0;
864 dev_dbg(&mmc
->class_dev
, "card is %s\n",
865 read_only
? "read-only" : "read-write");
870 static int dw_mci_get_cd(struct mmc_host
*mmc
)
873 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
874 struct dw_mci_board
*brd
= slot
->host
->pdata
;
876 /* Use platform get_cd function, else try onboard card detect */
877 if (brd
->quirks
& DW_MCI_QUIRK_BROKEN_CARD_DETECTION
)
879 else if (brd
->get_cd
)
880 present
= !brd
->get_cd(slot
->id
);
882 present
= (mci_readl(slot
->host
, CDETECT
) & (1 << slot
->id
))
886 dev_dbg(&mmc
->class_dev
, "card is present\n");
888 dev_dbg(&mmc
->class_dev
, "card is not present\n");
894 * Disable lower power mode.
896 * Low power mode will stop the card clock when idle. According to the
897 * description of the CLKENA register we should disable low power mode
898 * for SDIO cards if we need SDIO interrupts to work.
900 * This function is fast if low power mode is already disabled.
902 static void dw_mci_disable_low_power(struct dw_mci_slot
*slot
)
904 struct dw_mci
*host
= slot
->host
;
906 const u32 clken_low_pwr
= SDMMC_CLKEN_LOW_PWR
<< slot
->id
;
908 clk_en_a
= mci_readl(host
, CLKENA
);
910 if (clk_en_a
& clken_low_pwr
) {
911 mci_writel(host
, CLKENA
, clk_en_a
& ~clken_low_pwr
);
912 mci_send_cmd(slot
, SDMMC_CMD_UPD_CLK
|
913 SDMMC_CMD_PRV_DAT_WAIT
, 0);
917 static void dw_mci_enable_sdio_irq(struct mmc_host
*mmc
, int enb
)
919 struct dw_mci_slot
*slot
= mmc_priv(mmc
);
920 struct dw_mci
*host
= slot
->host
;
923 /* Enable/disable Slot Specific SDIO interrupt */
924 int_mask
= mci_readl(host
, INTMASK
);
927 * Turn off low power mode if it was enabled. This is a bit of
928 * a heavy operation and we disable / enable IRQs a lot, so
929 * we'll leave low power mode disabled and it will get
930 * re-enabled again in dw_mci_setup_bus().
932 dw_mci_disable_low_power(slot
);
934 mci_writel(host
, INTMASK
,
935 (int_mask
| SDMMC_INT_SDIO(slot
->id
)));
937 mci_writel(host
, INTMASK
,
938 (int_mask
& ~SDMMC_INT_SDIO(slot
->id
)));
942 static const struct mmc_host_ops dw_mci_ops
= {
943 .request
= dw_mci_request
,
944 .pre_req
= dw_mci_pre_req
,
945 .post_req
= dw_mci_post_req
,
946 .set_ios
= dw_mci_set_ios
,
947 .get_ro
= dw_mci_get_ro
,
948 .get_cd
= dw_mci_get_cd
,
949 .enable_sdio_irq
= dw_mci_enable_sdio_irq
,
952 static void dw_mci_request_end(struct dw_mci
*host
, struct mmc_request
*mrq
)
953 __releases(&host
->lock
)
954 __acquires(&host
->lock
)
956 struct dw_mci_slot
*slot
;
957 struct mmc_host
*prev_mmc
= host
->cur_slot
->mmc
;
959 WARN_ON(host
->cmd
|| host
->data
);
961 host
->cur_slot
->mrq
= NULL
;
963 if (!list_empty(&host
->queue
)) {
964 slot
= list_entry(host
->queue
.next
,
965 struct dw_mci_slot
, queue_node
);
966 list_del(&slot
->queue_node
);
967 dev_vdbg(host
->dev
, "list not empty: %s is next\n",
968 mmc_hostname(slot
->mmc
));
969 host
->state
= STATE_SENDING_CMD
;
970 dw_mci_start_request(host
, slot
);
972 dev_vdbg(host
->dev
, "list empty\n");
973 host
->state
= STATE_IDLE
;
976 spin_unlock(&host
->lock
);
977 mmc_request_done(prev_mmc
, mrq
);
978 spin_lock(&host
->lock
);
981 static void dw_mci_command_complete(struct dw_mci
*host
, struct mmc_command
*cmd
)
983 u32 status
= host
->cmd_status
;
985 host
->cmd_status
= 0;
987 /* Read the response from the card (up to 16 bytes) */
988 if (cmd
->flags
& MMC_RSP_PRESENT
) {
989 if (cmd
->flags
& MMC_RSP_136
) {
990 cmd
->resp
[3] = mci_readl(host
, RESP0
);
991 cmd
->resp
[2] = mci_readl(host
, RESP1
);
992 cmd
->resp
[1] = mci_readl(host
, RESP2
);
993 cmd
->resp
[0] = mci_readl(host
, RESP3
);
995 cmd
->resp
[0] = mci_readl(host
, RESP0
);
1002 if (status
& SDMMC_INT_RTO
)
1003 cmd
->error
= -ETIMEDOUT
;
1004 else if ((cmd
->flags
& MMC_RSP_CRC
) && (status
& SDMMC_INT_RCRC
))
1005 cmd
->error
= -EILSEQ
;
1006 else if (status
& SDMMC_INT_RESP_ERR
)
1012 /* newer ip versions need a delay between retries */
1013 if (host
->quirks
& DW_MCI_QUIRK_RETRY_DELAY
)
1017 dw_mci_stop_dma(host
);
1023 static void dw_mci_tasklet_func(unsigned long priv
)
1025 struct dw_mci
*host
= (struct dw_mci
*)priv
;
1026 struct mmc_data
*data
;
1027 struct mmc_command
*cmd
;
1028 enum dw_mci_state state
;
1029 enum dw_mci_state prev_state
;
1032 spin_lock(&host
->lock
);
1034 state
= host
->state
;
1044 case STATE_SENDING_CMD
:
1045 if (!test_and_clear_bit(EVENT_CMD_COMPLETE
,
1046 &host
->pending_events
))
1051 set_bit(EVENT_CMD_COMPLETE
, &host
->completed_events
);
1052 dw_mci_command_complete(host
, cmd
);
1053 if (cmd
== host
->mrq
->sbc
&& !cmd
->error
) {
1054 prev_state
= state
= STATE_SENDING_CMD
;
1055 __dw_mci_start_request(host
, host
->cur_slot
,
1060 if (!host
->mrq
->data
|| cmd
->error
) {
1061 dw_mci_request_end(host
, host
->mrq
);
1065 prev_state
= state
= STATE_SENDING_DATA
;
1068 case STATE_SENDING_DATA
:
1069 if (test_and_clear_bit(EVENT_DATA_ERROR
,
1070 &host
->pending_events
)) {
1071 dw_mci_stop_dma(host
);
1073 send_stop_cmd(host
, data
);
1074 state
= STATE_DATA_ERROR
;
1078 if (!test_and_clear_bit(EVENT_XFER_COMPLETE
,
1079 &host
->pending_events
))
1082 set_bit(EVENT_XFER_COMPLETE
, &host
->completed_events
);
1083 prev_state
= state
= STATE_DATA_BUSY
;
1086 case STATE_DATA_BUSY
:
1087 if (!test_and_clear_bit(EVENT_DATA_COMPLETE
,
1088 &host
->pending_events
))
1092 set_bit(EVENT_DATA_COMPLETE
, &host
->completed_events
);
1093 status
= host
->data_status
;
1095 if (status
& DW_MCI_DATA_ERROR_FLAGS
) {
1096 if (status
& SDMMC_INT_DRTO
) {
1097 data
->error
= -ETIMEDOUT
;
1098 } else if (status
& SDMMC_INT_DCRC
) {
1099 data
->error
= -EILSEQ
;
1100 } else if (status
& SDMMC_INT_EBE
&&
1102 DW_MCI_SEND_STATUS
) {
1104 * No data CRC status was returned.
1105 * The number of bytes transferred will
1106 * be exaggerated in PIO mode.
1108 data
->bytes_xfered
= 0;
1109 data
->error
= -ETIMEDOUT
;
1118 * After an error, there may be data lingering
1119 * in the FIFO, so reset it - doing so
1120 * generates a block interrupt, hence setting
1121 * the scatter-gather pointer to NULL.
1123 sg_miter_stop(&host
->sg_miter
);
1125 ctrl
= mci_readl(host
, CTRL
);
1126 ctrl
|= SDMMC_CTRL_FIFO_RESET
;
1127 mci_writel(host
, CTRL
, ctrl
);
1129 data
->bytes_xfered
= data
->blocks
* data
->blksz
;
1134 dw_mci_request_end(host
, host
->mrq
);
1138 if (host
->mrq
->sbc
&& !data
->error
) {
1139 data
->stop
->error
= 0;
1140 dw_mci_request_end(host
, host
->mrq
);
1144 prev_state
= state
= STATE_SENDING_STOP
;
1146 send_stop_cmd(host
, data
);
1149 case STATE_SENDING_STOP
:
1150 if (!test_and_clear_bit(EVENT_CMD_COMPLETE
,
1151 &host
->pending_events
))
1155 dw_mci_command_complete(host
, host
->mrq
->stop
);
1156 dw_mci_request_end(host
, host
->mrq
);
1159 case STATE_DATA_ERROR
:
1160 if (!test_and_clear_bit(EVENT_XFER_COMPLETE
,
1161 &host
->pending_events
))
1164 state
= STATE_DATA_BUSY
;
1167 } while (state
!= prev_state
);
1169 host
->state
= state
;
1171 spin_unlock(&host
->lock
);
1175 /* push final bytes to part_buf, only use during push */
1176 static void dw_mci_set_part_bytes(struct dw_mci
*host
, void *buf
, int cnt
)
1178 memcpy((void *)&host
->part_buf
, buf
, cnt
);
1179 host
->part_buf_count
= cnt
;
1182 /* append bytes to part_buf, only use during push */
1183 static int dw_mci_push_part_bytes(struct dw_mci
*host
, void *buf
, int cnt
)
1185 cnt
= min(cnt
, (1 << host
->data_shift
) - host
->part_buf_count
);
1186 memcpy((void *)&host
->part_buf
+ host
->part_buf_count
, buf
, cnt
);
1187 host
->part_buf_count
+= cnt
;
1191 /* pull first bytes from part_buf, only use during pull */
1192 static int dw_mci_pull_part_bytes(struct dw_mci
*host
, void *buf
, int cnt
)
1194 cnt
= min(cnt
, (int)host
->part_buf_count
);
1196 memcpy(buf
, (void *)&host
->part_buf
+ host
->part_buf_start
,
1198 host
->part_buf_count
-= cnt
;
1199 host
->part_buf_start
+= cnt
;
1204 /* pull final bytes from the part_buf, assuming it's just been filled */
1205 static void dw_mci_pull_final_bytes(struct dw_mci
*host
, void *buf
, int cnt
)
1207 memcpy(buf
, &host
->part_buf
, cnt
);
1208 host
->part_buf_start
= cnt
;
1209 host
->part_buf_count
= (1 << host
->data_shift
) - cnt
;
1212 static void dw_mci_push_data16(struct dw_mci
*host
, void *buf
, int cnt
)
1214 struct mmc_data
*data
= host
->data
;
1217 /* try and push anything in the part_buf */
1218 if (unlikely(host
->part_buf_count
)) {
1219 int len
= dw_mci_push_part_bytes(host
, buf
, cnt
);
1222 if (host
->part_buf_count
== 2) {
1223 mci_writew(host
, DATA(host
->data_offset
),
1225 host
->part_buf_count
= 0;
1228 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1229 if (unlikely((unsigned long)buf
& 0x1)) {
1231 u16 aligned_buf
[64];
1232 int len
= min(cnt
& -2, (int)sizeof(aligned_buf
));
1233 int items
= len
>> 1;
1235 /* memcpy from input buffer into aligned buffer */
1236 memcpy(aligned_buf
, buf
, len
);
1239 /* push data from aligned buffer into fifo */
1240 for (i
= 0; i
< items
; ++i
)
1241 mci_writew(host
, DATA(host
->data_offset
),
1248 for (; cnt
>= 2; cnt
-= 2)
1249 mci_writew(host
, DATA(host
->data_offset
), *pdata
++);
1252 /* put anything remaining in the part_buf */
1254 dw_mci_set_part_bytes(host
, buf
, cnt
);
1255 /* Push data if we have reached the expected data length */
1256 if ((data
->bytes_xfered
+ init_cnt
) ==
1257 (data
->blksz
* data
->blocks
))
1258 mci_writew(host
, DATA(host
->data_offset
),
1263 static void dw_mci_pull_data16(struct dw_mci
*host
, void *buf
, int cnt
)
1265 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1266 if (unlikely((unsigned long)buf
& 0x1)) {
1268 /* pull data from fifo into aligned buffer */
1269 u16 aligned_buf
[64];
1270 int len
= min(cnt
& -2, (int)sizeof(aligned_buf
));
1271 int items
= len
>> 1;
1273 for (i
= 0; i
< items
; ++i
)
1274 aligned_buf
[i
] = mci_readw(host
,
1275 DATA(host
->data_offset
));
1276 /* memcpy from aligned buffer into output buffer */
1277 memcpy(buf
, aligned_buf
, len
);
1285 for (; cnt
>= 2; cnt
-= 2)
1286 *pdata
++ = mci_readw(host
, DATA(host
->data_offset
));
1290 host
->part_buf16
= mci_readw(host
, DATA(host
->data_offset
));
1291 dw_mci_pull_final_bytes(host
, buf
, cnt
);
1295 static void dw_mci_push_data32(struct dw_mci
*host
, void *buf
, int cnt
)
1297 struct mmc_data
*data
= host
->data
;
1300 /* try and push anything in the part_buf */
1301 if (unlikely(host
->part_buf_count
)) {
1302 int len
= dw_mci_push_part_bytes(host
, buf
, cnt
);
1305 if (host
->part_buf_count
== 4) {
1306 mci_writel(host
, DATA(host
->data_offset
),
1308 host
->part_buf_count
= 0;
1311 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1312 if (unlikely((unsigned long)buf
& 0x3)) {
1314 u32 aligned_buf
[32];
1315 int len
= min(cnt
& -4, (int)sizeof(aligned_buf
));
1316 int items
= len
>> 2;
1318 /* memcpy from input buffer into aligned buffer */
1319 memcpy(aligned_buf
, buf
, len
);
1322 /* push data from aligned buffer into fifo */
1323 for (i
= 0; i
< items
; ++i
)
1324 mci_writel(host
, DATA(host
->data_offset
),
1331 for (; cnt
>= 4; cnt
-= 4)
1332 mci_writel(host
, DATA(host
->data_offset
), *pdata
++);
1335 /* put anything remaining in the part_buf */
1337 dw_mci_set_part_bytes(host
, buf
, cnt
);
1338 /* Push data if we have reached the expected data length */
1339 if ((data
->bytes_xfered
+ init_cnt
) ==
1340 (data
->blksz
* data
->blocks
))
1341 mci_writel(host
, DATA(host
->data_offset
),
1346 static void dw_mci_pull_data32(struct dw_mci
*host
, void *buf
, int cnt
)
1348 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1349 if (unlikely((unsigned long)buf
& 0x3)) {
1351 /* pull data from fifo into aligned buffer */
1352 u32 aligned_buf
[32];
1353 int len
= min(cnt
& -4, (int)sizeof(aligned_buf
));
1354 int items
= len
>> 2;
1356 for (i
= 0; i
< items
; ++i
)
1357 aligned_buf
[i
] = mci_readl(host
,
1358 DATA(host
->data_offset
));
1359 /* memcpy from aligned buffer into output buffer */
1360 memcpy(buf
, aligned_buf
, len
);
1368 for (; cnt
>= 4; cnt
-= 4)
1369 *pdata
++ = mci_readl(host
, DATA(host
->data_offset
));
1373 host
->part_buf32
= mci_readl(host
, DATA(host
->data_offset
));
1374 dw_mci_pull_final_bytes(host
, buf
, cnt
);
1378 static void dw_mci_push_data64(struct dw_mci
*host
, void *buf
, int cnt
)
1380 struct mmc_data
*data
= host
->data
;
1383 /* try and push anything in the part_buf */
1384 if (unlikely(host
->part_buf_count
)) {
1385 int len
= dw_mci_push_part_bytes(host
, buf
, cnt
);
1389 if (host
->part_buf_count
== 8) {
1390 mci_writeq(host
, DATA(host
->data_offset
),
1392 host
->part_buf_count
= 0;
1395 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1396 if (unlikely((unsigned long)buf
& 0x7)) {
1398 u64 aligned_buf
[16];
1399 int len
= min(cnt
& -8, (int)sizeof(aligned_buf
));
1400 int items
= len
>> 3;
1402 /* memcpy from input buffer into aligned buffer */
1403 memcpy(aligned_buf
, buf
, len
);
1406 /* push data from aligned buffer into fifo */
1407 for (i
= 0; i
< items
; ++i
)
1408 mci_writeq(host
, DATA(host
->data_offset
),
1415 for (; cnt
>= 8; cnt
-= 8)
1416 mci_writeq(host
, DATA(host
->data_offset
), *pdata
++);
1419 /* put anything remaining in the part_buf */
1421 dw_mci_set_part_bytes(host
, buf
, cnt
);
1422 /* Push data if we have reached the expected data length */
1423 if ((data
->bytes_xfered
+ init_cnt
) ==
1424 (data
->blksz
* data
->blocks
))
1425 mci_writeq(host
, DATA(host
->data_offset
),
1430 static void dw_mci_pull_data64(struct dw_mci
*host
, void *buf
, int cnt
)
1432 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1433 if (unlikely((unsigned long)buf
& 0x7)) {
1435 /* pull data from fifo into aligned buffer */
1436 u64 aligned_buf
[16];
1437 int len
= min(cnt
& -8, (int)sizeof(aligned_buf
));
1438 int items
= len
>> 3;
1440 for (i
= 0; i
< items
; ++i
)
1441 aligned_buf
[i
] = mci_readq(host
,
1442 DATA(host
->data_offset
));
1443 /* memcpy from aligned buffer into output buffer */
1444 memcpy(buf
, aligned_buf
, len
);
1452 for (; cnt
>= 8; cnt
-= 8)
1453 *pdata
++ = mci_readq(host
, DATA(host
->data_offset
));
1457 host
->part_buf
= mci_readq(host
, DATA(host
->data_offset
));
1458 dw_mci_pull_final_bytes(host
, buf
, cnt
);
1462 static void dw_mci_pull_data(struct dw_mci
*host
, void *buf
, int cnt
)
1466 /* get remaining partial bytes */
1467 len
= dw_mci_pull_part_bytes(host
, buf
, cnt
);
1468 if (unlikely(len
== cnt
))
1473 /* get the rest of the data */
1474 host
->pull_data(host
, buf
, cnt
);
1477 static void dw_mci_read_data_pio(struct dw_mci
*host
, bool dto
)
1479 struct sg_mapping_iter
*sg_miter
= &host
->sg_miter
;
1481 unsigned int offset
;
1482 struct mmc_data
*data
= host
->data
;
1483 int shift
= host
->data_shift
;
1486 unsigned int remain
, fcnt
;
1489 if (!sg_miter_next(sg_miter
))
1492 host
->sg
= sg_miter
->piter
.sg
;
1493 buf
= sg_miter
->addr
;
1494 remain
= sg_miter
->length
;
1498 fcnt
= (SDMMC_GET_FCNT(mci_readl(host
, STATUS
))
1499 << shift
) + host
->part_buf_count
;
1500 len
= min(remain
, fcnt
);
1503 dw_mci_pull_data(host
, (void *)(buf
+ offset
), len
);
1504 data
->bytes_xfered
+= len
;
1509 sg_miter
->consumed
= offset
;
1510 status
= mci_readl(host
, MINTSTS
);
1511 mci_writel(host
, RINTSTS
, SDMMC_INT_RXDR
);
1512 /* if the RXDR is ready read again */
1513 } while ((status
& SDMMC_INT_RXDR
) ||
1514 (dto
&& SDMMC_GET_FCNT(mci_readl(host
, STATUS
))));
1517 if (!sg_miter_next(sg_miter
))
1519 sg_miter
->consumed
= 0;
1521 sg_miter_stop(sg_miter
);
1525 sg_miter_stop(sg_miter
);
1528 set_bit(EVENT_XFER_COMPLETE
, &host
->pending_events
);
1531 static void dw_mci_write_data_pio(struct dw_mci
*host
)
1533 struct sg_mapping_iter
*sg_miter
= &host
->sg_miter
;
1535 unsigned int offset
;
1536 struct mmc_data
*data
= host
->data
;
1537 int shift
= host
->data_shift
;
1540 unsigned int fifo_depth
= host
->fifo_depth
;
1541 unsigned int remain
, fcnt
;
1544 if (!sg_miter_next(sg_miter
))
1547 host
->sg
= sg_miter
->piter
.sg
;
1548 buf
= sg_miter
->addr
;
1549 remain
= sg_miter
->length
;
1553 fcnt
= ((fifo_depth
-
1554 SDMMC_GET_FCNT(mci_readl(host
, STATUS
)))
1555 << shift
) - host
->part_buf_count
;
1556 len
= min(remain
, fcnt
);
1559 host
->push_data(host
, (void *)(buf
+ offset
), len
);
1560 data
->bytes_xfered
+= len
;
1565 sg_miter
->consumed
= offset
;
1566 status
= mci_readl(host
, MINTSTS
);
1567 mci_writel(host
, RINTSTS
, SDMMC_INT_TXDR
);
1568 } while (status
& SDMMC_INT_TXDR
); /* if TXDR write again */
1571 if (!sg_miter_next(sg_miter
))
1573 sg_miter
->consumed
= 0;
1575 sg_miter_stop(sg_miter
);
1579 sg_miter_stop(sg_miter
);
1582 set_bit(EVENT_XFER_COMPLETE
, &host
->pending_events
);
1585 static void dw_mci_cmd_interrupt(struct dw_mci
*host
, u32 status
)
1587 if (!host
->cmd_status
)
1588 host
->cmd_status
= status
;
1592 set_bit(EVENT_CMD_COMPLETE
, &host
->pending_events
);
1593 tasklet_schedule(&host
->tasklet
);
1596 static irqreturn_t
dw_mci_interrupt(int irq
, void *dev_id
)
1598 struct dw_mci
*host
= dev_id
;
1602 pending
= mci_readl(host
, MINTSTS
); /* read-only mask reg */
1605 * DTO fix - version 2.10a and below, and only if internal DMA
1608 if (host
->quirks
& DW_MCI_QUIRK_IDMAC_DTO
) {
1610 ((mci_readl(host
, STATUS
) >> 17) & 0x1fff))
1611 pending
|= SDMMC_INT_DATA_OVER
;
1615 if (pending
& DW_MCI_CMD_ERROR_FLAGS
) {
1616 mci_writel(host
, RINTSTS
, DW_MCI_CMD_ERROR_FLAGS
);
1617 host
->cmd_status
= pending
;
1619 set_bit(EVENT_CMD_COMPLETE
, &host
->pending_events
);
1622 if (pending
& DW_MCI_DATA_ERROR_FLAGS
) {
1623 /* if there is an error report DATA_ERROR */
1624 mci_writel(host
, RINTSTS
, DW_MCI_DATA_ERROR_FLAGS
);
1625 host
->data_status
= pending
;
1627 set_bit(EVENT_DATA_ERROR
, &host
->pending_events
);
1628 tasklet_schedule(&host
->tasklet
);
1631 if (pending
& SDMMC_INT_DATA_OVER
) {
1632 mci_writel(host
, RINTSTS
, SDMMC_INT_DATA_OVER
);
1633 if (!host
->data_status
)
1634 host
->data_status
= pending
;
1636 if (host
->dir_status
== DW_MCI_RECV_STATUS
) {
1637 if (host
->sg
!= NULL
)
1638 dw_mci_read_data_pio(host
, true);
1640 set_bit(EVENT_DATA_COMPLETE
, &host
->pending_events
);
1641 tasklet_schedule(&host
->tasklet
);
1644 if (pending
& SDMMC_INT_RXDR
) {
1645 mci_writel(host
, RINTSTS
, SDMMC_INT_RXDR
);
1646 if (host
->dir_status
== DW_MCI_RECV_STATUS
&& host
->sg
)
1647 dw_mci_read_data_pio(host
, false);
1650 if (pending
& SDMMC_INT_TXDR
) {
1651 mci_writel(host
, RINTSTS
, SDMMC_INT_TXDR
);
1652 if (host
->dir_status
== DW_MCI_SEND_STATUS
&& host
->sg
)
1653 dw_mci_write_data_pio(host
);
1656 if (pending
& SDMMC_INT_CMD_DONE
) {
1657 mci_writel(host
, RINTSTS
, SDMMC_INT_CMD_DONE
);
1658 dw_mci_cmd_interrupt(host
, pending
);
1661 if (pending
& SDMMC_INT_CD
) {
1662 mci_writel(host
, RINTSTS
, SDMMC_INT_CD
);
1663 queue_work(host
->card_workqueue
, &host
->card_work
);
1666 /* Handle SDIO Interrupts */
1667 for (i
= 0; i
< host
->num_slots
; i
++) {
1668 struct dw_mci_slot
*slot
= host
->slot
[i
];
1669 if (pending
& SDMMC_INT_SDIO(i
)) {
1670 mci_writel(host
, RINTSTS
, SDMMC_INT_SDIO(i
));
1671 mmc_signal_sdio_irq(slot
->mmc
);
1677 #ifdef CONFIG_MMC_DW_IDMAC
1678 /* Handle DMA interrupts */
1679 pending
= mci_readl(host
, IDSTS
);
1680 if (pending
& (SDMMC_IDMAC_INT_TI
| SDMMC_IDMAC_INT_RI
)) {
1681 mci_writel(host
, IDSTS
, SDMMC_IDMAC_INT_TI
| SDMMC_IDMAC_INT_RI
);
1682 mci_writel(host
, IDSTS
, SDMMC_IDMAC_INT_NI
);
1683 host
->dma_ops
->complete(host
);
1690 static void dw_mci_work_routine_card(struct work_struct
*work
)
1692 struct dw_mci
*host
= container_of(work
, struct dw_mci
, card_work
);
1695 for (i
= 0; i
< host
->num_slots
; i
++) {
1696 struct dw_mci_slot
*slot
= host
->slot
[i
];
1697 struct mmc_host
*mmc
= slot
->mmc
;
1698 struct mmc_request
*mrq
;
1702 present
= dw_mci_get_cd(mmc
);
1703 while (present
!= slot
->last_detect_state
) {
1704 dev_dbg(&slot
->mmc
->class_dev
, "card %s\n",
1705 present
? "inserted" : "removed");
1707 spin_lock_bh(&host
->lock
);
1709 /* Card change detected */
1710 slot
->last_detect_state
= present
;
1712 /* Mark card as present if applicable */
1714 set_bit(DW_MMC_CARD_PRESENT
, &slot
->flags
);
1716 /* Clean up queue if present */
1719 if (mrq
== host
->mrq
) {
1723 switch (host
->state
) {
1726 case STATE_SENDING_CMD
:
1727 mrq
->cmd
->error
= -ENOMEDIUM
;
1731 case STATE_SENDING_DATA
:
1732 mrq
->data
->error
= -ENOMEDIUM
;
1733 dw_mci_stop_dma(host
);
1735 case STATE_DATA_BUSY
:
1736 case STATE_DATA_ERROR
:
1737 if (mrq
->data
->error
== -EINPROGRESS
)
1738 mrq
->data
->error
= -ENOMEDIUM
;
1742 case STATE_SENDING_STOP
:
1743 mrq
->stop
->error
= -ENOMEDIUM
;
1747 dw_mci_request_end(host
, mrq
);
1749 list_del(&slot
->queue_node
);
1750 mrq
->cmd
->error
= -ENOMEDIUM
;
1752 mrq
->data
->error
= -ENOMEDIUM
;
1754 mrq
->stop
->error
= -ENOMEDIUM
;
1756 spin_unlock(&host
->lock
);
1757 mmc_request_done(slot
->mmc
, mrq
);
1758 spin_lock(&host
->lock
);
1762 /* Power down slot */
1764 clear_bit(DW_MMC_CARD_PRESENT
, &slot
->flags
);
1767 * Clear down the FIFO - doing so generates a
1768 * block interrupt, hence setting the
1769 * scatter-gather pointer to NULL.
1771 sg_miter_stop(&host
->sg_miter
);
1774 ctrl
= mci_readl(host
, CTRL
);
1775 ctrl
|= SDMMC_CTRL_FIFO_RESET
;
1776 mci_writel(host
, CTRL
, ctrl
);
1778 #ifdef CONFIG_MMC_DW_IDMAC
1779 ctrl
= mci_readl(host
, BMOD
);
1780 /* Software reset of DMA */
1781 ctrl
|= SDMMC_IDMAC_SWRESET
;
1782 mci_writel(host
, BMOD
, ctrl
);
1787 spin_unlock_bh(&host
->lock
);
1789 present
= dw_mci_get_cd(mmc
);
1792 mmc_detect_change(slot
->mmc
,
1793 msecs_to_jiffies(host
->pdata
->detect_delay_ms
));
1798 /* given a slot id, find out the device node representing that slot */
1799 static struct device_node
*dw_mci_of_find_slot_node(struct device
*dev
, u8 slot
)
1801 struct device_node
*np
;
1805 if (!dev
|| !dev
->of_node
)
1808 for_each_child_of_node(dev
->of_node
, np
) {
1809 addr
= of_get_property(np
, "reg", &len
);
1810 if (!addr
|| (len
< sizeof(int)))
1812 if (be32_to_cpup(addr
) == slot
)
1818 static struct dw_mci_of_slot_quirks
{
1821 } of_slot_quirks
[] = {
1823 .quirk
= "disable-wp",
1824 .id
= DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT
,
1828 static int dw_mci_of_get_slot_quirks(struct device
*dev
, u8 slot
)
1830 struct device_node
*np
= dw_mci_of_find_slot_node(dev
, slot
);
1835 for (idx
= 0; idx
< ARRAY_SIZE(of_slot_quirks
); idx
++)
1836 if (of_get_property(np
, of_slot_quirks
[idx
].quirk
, NULL
))
1837 quirks
|= of_slot_quirks
[idx
].id
;
1842 /* find out bus-width for a given slot */
1843 static u32
dw_mci_of_get_bus_wd(struct device
*dev
, u8 slot
)
1845 struct device_node
*np
= dw_mci_of_find_slot_node(dev
, slot
);
1851 if (of_property_read_u32(np
, "bus-width", &bus_wd
))
1852 dev_err(dev
, "bus-width property not found, assuming width"
1857 /* find the write protect gpio for a given slot; or -1 if none specified */
1858 static int dw_mci_of_get_wp_gpio(struct device
*dev
, u8 slot
)
1860 struct device_node
*np
= dw_mci_of_find_slot_node(dev
, slot
);
1866 gpio
= of_get_named_gpio(np
, "wp-gpios", 0);
1868 /* Having a missing entry is valid; return silently */
1869 if (!gpio_is_valid(gpio
))
1872 if (devm_gpio_request(dev
, gpio
, "dw-mci-wp")) {
1873 dev_warn(dev
, "gpio [%d] request failed\n", gpio
);
1879 #else /* CONFIG_OF */
1880 static int dw_mci_of_get_slot_quirks(struct device
*dev
, u8 slot
)
1884 static u32
dw_mci_of_get_bus_wd(struct device
*dev
, u8 slot
)
1888 static struct device_node
*dw_mci_of_find_slot_node(struct device
*dev
, u8 slot
)
1892 static int dw_mci_of_get_wp_gpio(struct device
*dev
, u8 slot
)
1896 #endif /* CONFIG_OF */
1898 static int dw_mci_init_slot(struct dw_mci
*host
, unsigned int id
)
1900 struct mmc_host
*mmc
;
1901 struct dw_mci_slot
*slot
;
1902 const struct dw_mci_drv_data
*drv_data
= host
->drv_data
;
1906 mmc
= mmc_alloc_host(sizeof(struct dw_mci_slot
), host
->dev
);
1910 slot
= mmc_priv(mmc
);
1914 host
->slot
[id
] = slot
;
1916 slot
->quirks
= dw_mci_of_get_slot_quirks(host
->dev
, slot
->id
);
1918 mmc
->ops
= &dw_mci_ops
;
1919 mmc
->f_min
= DIV_ROUND_UP(host
->bus_hz
, 510);
1920 mmc
->f_max
= host
->bus_hz
;
1922 if (host
->pdata
->get_ocr
)
1923 mmc
->ocr_avail
= host
->pdata
->get_ocr(id
);
1925 mmc
->ocr_avail
= MMC_VDD_32_33
| MMC_VDD_33_34
;
1928 * Start with slot power disabled, it will be enabled when a card
1931 if (host
->pdata
->setpower
)
1932 host
->pdata
->setpower(id
, 0);
1934 if (host
->pdata
->caps
)
1935 mmc
->caps
= host
->pdata
->caps
;
1937 if (host
->pdata
->pm_caps
)
1938 mmc
->pm_caps
= host
->pdata
->pm_caps
;
1940 if (host
->dev
->of_node
) {
1941 ctrl_id
= of_alias_get_id(host
->dev
->of_node
, "mshc");
1945 ctrl_id
= to_platform_device(host
->dev
)->id
;
1947 if (drv_data
&& drv_data
->caps
)
1948 mmc
->caps
|= drv_data
->caps
[ctrl_id
];
1950 if (host
->pdata
->caps2
)
1951 mmc
->caps2
= host
->pdata
->caps2
;
1953 if (host
->pdata
->get_bus_wd
)
1954 bus_width
= host
->pdata
->get_bus_wd(slot
->id
);
1955 else if (host
->dev
->of_node
)
1956 bus_width
= dw_mci_of_get_bus_wd(host
->dev
, slot
->id
);
1960 switch (bus_width
) {
1962 mmc
->caps
|= MMC_CAP_8_BIT_DATA
;
1964 mmc
->caps
|= MMC_CAP_4_BIT_DATA
;
1967 if (host
->pdata
->quirks
& DW_MCI_QUIRK_HIGHSPEED
)
1968 mmc
->caps
|= MMC_CAP_SD_HIGHSPEED
| MMC_CAP_MMC_HIGHSPEED
;
1970 if (host
->pdata
->blk_settings
) {
1971 mmc
->max_segs
= host
->pdata
->blk_settings
->max_segs
;
1972 mmc
->max_blk_size
= host
->pdata
->blk_settings
->max_blk_size
;
1973 mmc
->max_blk_count
= host
->pdata
->blk_settings
->max_blk_count
;
1974 mmc
->max_req_size
= host
->pdata
->blk_settings
->max_req_size
;
1975 mmc
->max_seg_size
= host
->pdata
->blk_settings
->max_seg_size
;
1977 /* Useful defaults if platform data is unset. */
1978 #ifdef CONFIG_MMC_DW_IDMAC
1979 mmc
->max_segs
= host
->ring_size
;
1980 mmc
->max_blk_size
= 65536;
1981 mmc
->max_blk_count
= host
->ring_size
;
1982 mmc
->max_seg_size
= 0x1000;
1983 mmc
->max_req_size
= mmc
->max_seg_size
* mmc
->max_blk_count
;
1986 mmc
->max_blk_size
= 65536; /* BLKSIZ is 16 bits */
1987 mmc
->max_blk_count
= 512;
1988 mmc
->max_req_size
= mmc
->max_blk_size
* mmc
->max_blk_count
;
1989 mmc
->max_seg_size
= mmc
->max_req_size
;
1990 #endif /* CONFIG_MMC_DW_IDMAC */
1993 if (dw_mci_get_cd(mmc
))
1994 set_bit(DW_MMC_CARD_PRESENT
, &slot
->flags
);
1996 clear_bit(DW_MMC_CARD_PRESENT
, &slot
->flags
);
1998 slot
->wp_gpio
= dw_mci_of_get_wp_gpio(host
->dev
, slot
->id
);
2000 ret
= mmc_add_host(mmc
);
2004 #if defined(CONFIG_DEBUG_FS)
2005 dw_mci_init_debugfs(slot
);
2008 /* Card initially undetected */
2009 slot
->last_detect_state
= 0;
2012 * Card may have been plugged in prior to boot so we
2013 * need to run the detect tasklet
2015 queue_work(host
->card_workqueue
, &host
->card_work
);
2024 static void dw_mci_cleanup_slot(struct dw_mci_slot
*slot
, unsigned int id
)
2026 /* Shutdown detect IRQ */
2027 if (slot
->host
->pdata
->exit
)
2028 slot
->host
->pdata
->exit(id
);
2030 /* Debugfs stuff is cleaned up by mmc core */
2031 mmc_remove_host(slot
->mmc
);
2032 slot
->host
->slot
[id
] = NULL
;
2033 mmc_free_host(slot
->mmc
);
2036 static void dw_mci_init_dma(struct dw_mci
*host
)
2038 /* Alloc memory for sg translation */
2039 host
->sg_cpu
= dmam_alloc_coherent(host
->dev
, PAGE_SIZE
,
2040 &host
->sg_dma
, GFP_KERNEL
);
2041 if (!host
->sg_cpu
) {
2042 dev_err(host
->dev
, "%s: could not alloc DMA memory\n",
2047 /* Determine which DMA interface to use */
2048 #ifdef CONFIG_MMC_DW_IDMAC
2049 host
->dma_ops
= &dw_mci_idmac_ops
;
2050 dev_info(host
->dev
, "Using internal DMA controller.\n");
2056 if (host
->dma_ops
->init
&& host
->dma_ops
->start
&&
2057 host
->dma_ops
->stop
&& host
->dma_ops
->cleanup
) {
2058 if (host
->dma_ops
->init(host
)) {
2059 dev_err(host
->dev
, "%s: Unable to initialize "
2060 "DMA Controller.\n", __func__
);
2064 dev_err(host
->dev
, "DMA initialization not found.\n");
2072 dev_info(host
->dev
, "Using PIO mode.\n");
2077 static bool mci_wait_reset(struct device
*dev
, struct dw_mci
*host
)
2079 unsigned long timeout
= jiffies
+ msecs_to_jiffies(500);
2082 mci_writel(host
, CTRL
, (SDMMC_CTRL_RESET
| SDMMC_CTRL_FIFO_RESET
|
2083 SDMMC_CTRL_DMA_RESET
));
2085 /* wait till resets clear */
2087 ctrl
= mci_readl(host
, CTRL
);
2088 if (!(ctrl
& (SDMMC_CTRL_RESET
| SDMMC_CTRL_FIFO_RESET
|
2089 SDMMC_CTRL_DMA_RESET
)))
2091 } while (time_before(jiffies
, timeout
));
2093 dev_err(dev
, "Timeout resetting block (ctrl %#x)\n", ctrl
);
2099 static struct dw_mci_of_quirks
{
2104 .quirk
= "supports-highspeed",
2105 .id
= DW_MCI_QUIRK_HIGHSPEED
,
2107 .quirk
= "broken-cd",
2108 .id
= DW_MCI_QUIRK_BROKEN_CARD_DETECTION
,
2112 static struct dw_mci_board
*dw_mci_parse_dt(struct dw_mci
*host
)
2114 struct dw_mci_board
*pdata
;
2115 struct device
*dev
= host
->dev
;
2116 struct device_node
*np
= dev
->of_node
;
2117 const struct dw_mci_drv_data
*drv_data
= host
->drv_data
;
2119 u32 clock_frequency
;
2121 pdata
= devm_kzalloc(dev
, sizeof(*pdata
), GFP_KERNEL
);
2123 dev_err(dev
, "could not allocate memory for pdata\n");
2124 return ERR_PTR(-ENOMEM
);
2127 /* find out number of slots supported */
2128 if (of_property_read_u32(dev
->of_node
, "num-slots",
2129 &pdata
->num_slots
)) {
2130 dev_info(dev
, "num-slots property not found, "
2131 "assuming 1 slot is available\n");
2132 pdata
->num_slots
= 1;
2136 for (idx
= 0; idx
< ARRAY_SIZE(of_quirks
); idx
++)
2137 if (of_get_property(np
, of_quirks
[idx
].quirk
, NULL
))
2138 pdata
->quirks
|= of_quirks
[idx
].id
;
2140 if (of_property_read_u32(np
, "fifo-depth", &pdata
->fifo_depth
))
2141 dev_info(dev
, "fifo-depth property not found, using "
2142 "value of FIFOTH register as default\n");
2144 of_property_read_u32(np
, "card-detect-delay", &pdata
->detect_delay_ms
);
2146 if (!of_property_read_u32(np
, "clock-frequency", &clock_frequency
))
2147 pdata
->bus_hz
= clock_frequency
;
2149 if (drv_data
&& drv_data
->parse_dt
) {
2150 ret
= drv_data
->parse_dt(host
);
2152 return ERR_PTR(ret
);
2155 if (of_find_property(np
, "keep-power-in-suspend", NULL
))
2156 pdata
->pm_caps
|= MMC_PM_KEEP_POWER
;
2158 if (of_find_property(np
, "enable-sdio-wakeup", NULL
))
2159 pdata
->pm_caps
|= MMC_PM_WAKE_SDIO_IRQ
;
2164 #else /* CONFIG_OF */
2165 static struct dw_mci_board
*dw_mci_parse_dt(struct dw_mci
*host
)
2167 return ERR_PTR(-EINVAL
);
2169 #endif /* CONFIG_OF */
2171 int dw_mci_probe(struct dw_mci
*host
)
2173 const struct dw_mci_drv_data
*drv_data
= host
->drv_data
;
2174 int width
, i
, ret
= 0;
2179 host
->pdata
= dw_mci_parse_dt(host
);
2180 if (IS_ERR(host
->pdata
)) {
2181 dev_err(host
->dev
, "platform data not available\n");
2186 if (!host
->pdata
->select_slot
&& host
->pdata
->num_slots
> 1) {
2188 "Platform data must supply select_slot function\n");
2192 host
->biu_clk
= devm_clk_get(host
->dev
, "biu");
2193 if (IS_ERR(host
->biu_clk
)) {
2194 dev_dbg(host
->dev
, "biu clock not available\n");
2196 ret
= clk_prepare_enable(host
->biu_clk
);
2198 dev_err(host
->dev
, "failed to enable biu clock\n");
2203 host
->ciu_clk
= devm_clk_get(host
->dev
, "ciu");
2204 if (IS_ERR(host
->ciu_clk
)) {
2205 dev_dbg(host
->dev
, "ciu clock not available\n");
2206 host
->bus_hz
= host
->pdata
->bus_hz
;
2208 ret
= clk_prepare_enable(host
->ciu_clk
);
2210 dev_err(host
->dev
, "failed to enable ciu clock\n");
2214 if (host
->pdata
->bus_hz
) {
2215 ret
= clk_set_rate(host
->ciu_clk
, host
->pdata
->bus_hz
);
2218 "Unable to set bus rate to %ul\n",
2219 host
->pdata
->bus_hz
);
2221 host
->bus_hz
= clk_get_rate(host
->ciu_clk
);
2224 if (drv_data
&& drv_data
->setup_clock
) {
2225 ret
= drv_data
->setup_clock(host
);
2228 "implementation specific clock setup failed\n");
2233 host
->vmmc
= devm_regulator_get_optional(host
->dev
, "vmmc");
2234 if (IS_ERR(host
->vmmc
)) {
2235 ret
= PTR_ERR(host
->vmmc
);
2236 if (ret
== -EPROBE_DEFER
)
2239 dev_info(host
->dev
, "no vmmc regulator found: %d\n", ret
);
2242 ret
= regulator_enable(host
->vmmc
);
2244 if (ret
!= -EPROBE_DEFER
)
2246 "regulator_enable fail: %d\n", ret
);
2251 if (!host
->bus_hz
) {
2253 "Platform data must supply bus speed\n");
2258 host
->quirks
= host
->pdata
->quirks
;
2260 spin_lock_init(&host
->lock
);
2261 INIT_LIST_HEAD(&host
->queue
);
2264 * Get the host data width - this assumes that HCON has been set with
2265 * the correct values.
2267 i
= (mci_readl(host
, HCON
) >> 7) & 0x7;
2269 host
->push_data
= dw_mci_push_data16
;
2270 host
->pull_data
= dw_mci_pull_data16
;
2272 host
->data_shift
= 1;
2273 } else if (i
== 2) {
2274 host
->push_data
= dw_mci_push_data64
;
2275 host
->pull_data
= dw_mci_pull_data64
;
2277 host
->data_shift
= 3;
2279 /* Check for a reserved value, and warn if it is */
2281 "HCON reports a reserved host data width!\n"
2282 "Defaulting to 32-bit access.\n");
2283 host
->push_data
= dw_mci_push_data32
;
2284 host
->pull_data
= dw_mci_pull_data32
;
2286 host
->data_shift
= 2;
2289 /* Reset all blocks */
2290 if (!mci_wait_reset(host
->dev
, host
))
2293 host
->dma_ops
= host
->pdata
->dma_ops
;
2294 dw_mci_init_dma(host
);
2296 /* Clear the interrupts for the host controller */
2297 mci_writel(host
, RINTSTS
, 0xFFFFFFFF);
2298 mci_writel(host
, INTMASK
, 0); /* disable all mmc interrupt first */
2300 /* Put in max timeout */
2301 mci_writel(host
, TMOUT
, 0xFFFFFFFF);
2304 * FIFO threshold settings RxMark = fifo_size / 2 - 1,
2305 * Tx Mark = fifo_size / 2 DMA Size = 8
2307 if (!host
->pdata
->fifo_depth
) {
2309 * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may
2310 * have been overwritten by the bootloader, just like we're
2311 * about to do, so if you know the value for your hardware, you
2312 * should put it in the platform data.
2314 fifo_size
= mci_readl(host
, FIFOTH
);
2315 fifo_size
= 1 + ((fifo_size
>> 16) & 0xfff);
2317 fifo_size
= host
->pdata
->fifo_depth
;
2319 host
->fifo_depth
= fifo_size
;
2320 host
->fifoth_val
= ((0x2 << 28) | ((fifo_size
/2 - 1) << 16) |
2321 ((fifo_size
/2) << 0));
2322 mci_writel(host
, FIFOTH
, host
->fifoth_val
);
2324 /* disable clock to CIU */
2325 mci_writel(host
, CLKENA
, 0);
2326 mci_writel(host
, CLKSRC
, 0);
2329 * In 2.40a spec, Data offset is changed.
2330 * Need to check the version-id and set data-offset for DATA register.
2332 host
->verid
= SDMMC_GET_VERID(mci_readl(host
, VERID
));
2333 dev_info(host
->dev
, "Version ID is %04x\n", host
->verid
);
2335 if (host
->verid
< DW_MMC_240A
)
2336 host
->data_offset
= DATA_OFFSET
;
2338 host
->data_offset
= DATA_240A_OFFSET
;
2340 tasklet_init(&host
->tasklet
, dw_mci_tasklet_func
, (unsigned long)host
);
2341 host
->card_workqueue
= alloc_workqueue("dw-mci-card",
2342 WQ_MEM_RECLAIM
| WQ_NON_REENTRANT
, 1);
2343 if (!host
->card_workqueue
) {
2347 INIT_WORK(&host
->card_work
, dw_mci_work_routine_card
);
2348 ret
= devm_request_irq(host
->dev
, host
->irq
, dw_mci_interrupt
,
2349 host
->irq_flags
, "dw-mci", host
);
2353 if (host
->pdata
->num_slots
)
2354 host
->num_slots
= host
->pdata
->num_slots
;
2356 host
->num_slots
= ((mci_readl(host
, HCON
) >> 1) & 0x1F) + 1;
2359 * Enable interrupts for command done, data over, data empty, card det,
2360 * receive ready and error such as transmit, receive timeout, crc error
2362 mci_writel(host
, RINTSTS
, 0xFFFFFFFF);
2363 mci_writel(host
, INTMASK
, SDMMC_INT_CMD_DONE
| SDMMC_INT_DATA_OVER
|
2364 SDMMC_INT_TXDR
| SDMMC_INT_RXDR
|
2365 DW_MCI_ERROR_FLAGS
| SDMMC_INT_CD
);
2366 mci_writel(host
, CTRL
, SDMMC_CTRL_INT_ENABLE
); /* Enable mci interrupt */
2368 dev_info(host
->dev
, "DW MMC controller at irq %d, "
2369 "%d bit host data width, "
2371 host
->irq
, width
, fifo_size
);
2373 /* We need at least one slot to succeed */
2374 for (i
= 0; i
< host
->num_slots
; i
++) {
2375 ret
= dw_mci_init_slot(host
, i
);
2377 dev_dbg(host
->dev
, "slot %d init failed\n", i
);
2383 dev_info(host
->dev
, "%d slots initialized\n", init_slots
);
2385 dev_dbg(host
->dev
, "attempted to initialize %d slots, "
2386 "but failed on all\n", host
->num_slots
);
2390 if (host
->quirks
& DW_MCI_QUIRK_IDMAC_DTO
)
2391 dev_info(host
->dev
, "Internal DMAC interrupt fix enabled.\n");
2396 destroy_workqueue(host
->card_workqueue
);
2399 if (host
->use_dma
&& host
->dma_ops
->exit
)
2400 host
->dma_ops
->exit(host
);
2404 regulator_disable(host
->vmmc
);
2407 if (!IS_ERR(host
->ciu_clk
))
2408 clk_disable_unprepare(host
->ciu_clk
);
2411 if (!IS_ERR(host
->biu_clk
))
2412 clk_disable_unprepare(host
->biu_clk
);
2416 EXPORT_SYMBOL(dw_mci_probe
);
2418 void dw_mci_remove(struct dw_mci
*host
)
2422 mci_writel(host
, RINTSTS
, 0xFFFFFFFF);
2423 mci_writel(host
, INTMASK
, 0); /* disable all mmc interrupt first */
2425 for (i
= 0; i
< host
->num_slots
; i
++) {
2426 dev_dbg(host
->dev
, "remove slot %d\n", i
);
2428 dw_mci_cleanup_slot(host
->slot
[i
], i
);
2431 /* disable clock to CIU */
2432 mci_writel(host
, CLKENA
, 0);
2433 mci_writel(host
, CLKSRC
, 0);
2435 destroy_workqueue(host
->card_workqueue
);
2437 if (host
->use_dma
&& host
->dma_ops
->exit
)
2438 host
->dma_ops
->exit(host
);
2441 regulator_disable(host
->vmmc
);
2443 if (!IS_ERR(host
->ciu_clk
))
2444 clk_disable_unprepare(host
->ciu_clk
);
2446 if (!IS_ERR(host
->biu_clk
))
2447 clk_disable_unprepare(host
->biu_clk
);
2449 EXPORT_SYMBOL(dw_mci_remove
);
2453 #ifdef CONFIG_PM_SLEEP
2455 * TODO: we should probably disable the clock to the card in the suspend path.
2457 int dw_mci_suspend(struct dw_mci
*host
)
2461 for (i
= 0; i
< host
->num_slots
; i
++) {
2462 struct dw_mci_slot
*slot
= host
->slot
[i
];
2465 ret
= mmc_suspend_host(slot
->mmc
);
2468 slot
= host
->slot
[i
];
2470 mmc_resume_host(host
->slot
[i
]->mmc
);
2477 regulator_disable(host
->vmmc
);
2481 EXPORT_SYMBOL(dw_mci_suspend
);
2483 int dw_mci_resume(struct dw_mci
*host
)
2488 ret
= regulator_enable(host
->vmmc
);
2491 "failed to enable regulator: %d\n", ret
);
2496 if (!mci_wait_reset(host
->dev
, host
)) {
2501 if (host
->use_dma
&& host
->dma_ops
->init
)
2502 host
->dma_ops
->init(host
);
2504 /* Restore the old value at FIFOTH register */
2505 mci_writel(host
, FIFOTH
, host
->fifoth_val
);
2507 mci_writel(host
, RINTSTS
, 0xFFFFFFFF);
2508 mci_writel(host
, INTMASK
, SDMMC_INT_CMD_DONE
| SDMMC_INT_DATA_OVER
|
2509 SDMMC_INT_TXDR
| SDMMC_INT_RXDR
|
2510 DW_MCI_ERROR_FLAGS
| SDMMC_INT_CD
);
2511 mci_writel(host
, CTRL
, SDMMC_CTRL_INT_ENABLE
);
2513 for (i
= 0; i
< host
->num_slots
; i
++) {
2514 struct dw_mci_slot
*slot
= host
->slot
[i
];
2517 if (slot
->mmc
->pm_flags
& MMC_PM_KEEP_POWER
) {
2518 dw_mci_set_ios(slot
->mmc
, &slot
->mmc
->ios
);
2519 dw_mci_setup_bus(slot
, true);
2522 ret
= mmc_resume_host(host
->slot
[i
]->mmc
);
2528 EXPORT_SYMBOL(dw_mci_resume
);
2529 #endif /* CONFIG_PM_SLEEP */
2531 static int __init
dw_mci_init(void)
2533 pr_info("Synopsys Designware Multimedia Card Interface Driver\n");
2537 static void __exit
dw_mci_exit(void)
2541 module_init(dw_mci_init
);
2542 module_exit(dw_mci_exit
);
2544 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
2545 MODULE_AUTHOR("NXP Semiconductor VietNam");
2546 MODULE_AUTHOR("Imagination Technologies Ltd");
2547 MODULE_LICENSE("GPL v2");