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/scatterlist.h>
26 #include <linux/seq_file.h>
27 #include <linux/slab.h>
28 #include <linux/stat.h>
29 #include <linux/delay.h>
30 #include <linux/irq.h>
31 #include <linux/mmc/host.h>
32 #include <linux/mmc/mmc.h>
33 #include <linux/mmc/dw_mmc.h>
34 #include <linux/bitops.h>
35 #include <linux/regulator/consumer.h>
36 #include <linux/workqueue.h>
40 /* Common flag combinations */
41 #define DW_MCI_DATA_ERROR_FLAGS (SDMMC_INT_DTO | SDMMC_INT_DCRC | \
42 SDMMC_INT_HTO | SDMMC_INT_SBE | \
44 #define DW_MCI_CMD_ERROR_FLAGS (SDMMC_INT_RTO | SDMMC_INT_RCRC | \
46 #define DW_MCI_ERROR_FLAGS (DW_MCI_DATA_ERROR_FLAGS | \
47 DW_MCI_CMD_ERROR_FLAGS | SDMMC_INT_HLE)
48 #define DW_MCI_SEND_STATUS 1
49 #define DW_MCI_RECV_STATUS 2
50 #define DW_MCI_DMA_THRESHOLD 16
52 #ifdef CONFIG_MMC_DW_IDMAC
54 u32 des0; /* Control Descriptor */
55 #define IDMAC_DES0_DIC BIT(1)
56 #define IDMAC_DES0_LD BIT(2)
57 #define IDMAC_DES0_FD BIT(3)
58 #define IDMAC_DES0_CH BIT(4)
59 #define IDMAC_DES0_ER BIT(5)
60 #define IDMAC_DES0_CES BIT(30)
61 #define IDMAC_DES0_OWN BIT(31)
63 u32 des1; /* Buffer sizes */
64 #define IDMAC_SET_BUFFER1_SIZE(d, s) \
65 ((d)->des1 = ((d)->des1 & 0x03ffe000) | ((s) & 0x1fff))
67 u32 des2; /* buffer 1 physical address */
69 u32 des3; /* buffer 2 physical address */
71 #endif /* CONFIG_MMC_DW_IDMAC */
74 * struct dw_mci_slot - MMC slot state
75 * @mmc: The mmc_host representing this slot.
76 * @host: The MMC controller this slot is using.
77 * @ctype: Card type for this slot.
78 * @mrq: mmc_request currently being processed or waiting to be
79 * processed, or NULL when the slot is idle.
80 * @queue_node: List node for placing this node in the @queue list of
82 * @clock: Clock rate configured by set_ios(). Protected by host->lock.
83 * @flags: Random state bits associated with the slot.
84 * @id: Number of this slot.
85 * @last_detect_state: Most recently observed card detect state.
93 struct mmc_request *mrq;
94 struct list_head queue_node;
98 #define DW_MMC_CARD_PRESENT 0
99 #define DW_MMC_CARD_NEED_INIT 1
101 int last_detect_state;
104 static struct workqueue_struct *dw_mci_card_workqueue;
106 #if defined(CONFIG_DEBUG_FS)
107 static int dw_mci_req_show(struct seq_file *s, void *v)
109 struct dw_mci_slot *slot = s->private;
110 struct mmc_request *mrq;
111 struct mmc_command *cmd;
112 struct mmc_command *stop;
113 struct mmc_data *data;
115 /* Make sure we get a consistent snapshot */
116 spin_lock_bh(&slot->host->lock);
126 "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n",
127 cmd->opcode, cmd->arg, cmd->flags,
128 cmd->resp[0], cmd->resp[1], cmd->resp[2],
129 cmd->resp[2], cmd->error);
131 seq_printf(s, "DATA %u / %u * %u flg %x err %d\n",
132 data->bytes_xfered, data->blocks,
133 data->blksz, data->flags, data->error);
136 "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n",
137 stop->opcode, stop->arg, stop->flags,
138 stop->resp[0], stop->resp[1], stop->resp[2],
139 stop->resp[2], stop->error);
142 spin_unlock_bh(&slot->host->lock);
147 static int dw_mci_req_open(struct inode *inode, struct file *file)
149 return single_open(file, dw_mci_req_show, inode->i_private);
152 static const struct file_operations dw_mci_req_fops = {
153 .owner = THIS_MODULE,
154 .open = dw_mci_req_open,
157 .release = single_release,
160 static int dw_mci_regs_show(struct seq_file *s, void *v)
162 seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS);
163 seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS);
164 seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD);
165 seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL);
166 seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK);
167 seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA);
172 static int dw_mci_regs_open(struct inode *inode, struct file *file)
174 return single_open(file, dw_mci_regs_show, inode->i_private);
177 static const struct file_operations dw_mci_regs_fops = {
178 .owner = THIS_MODULE,
179 .open = dw_mci_regs_open,
182 .release = single_release,
185 static void dw_mci_init_debugfs(struct dw_mci_slot *slot)
187 struct mmc_host *mmc = slot->mmc;
188 struct dw_mci *host = slot->host;
192 root = mmc->debugfs_root;
196 node = debugfs_create_file("regs", S_IRUSR, root, host,
201 node = debugfs_create_file("req", S_IRUSR, root, slot,
206 node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state);
210 node = debugfs_create_x32("pending_events", S_IRUSR, root,
211 (u32 *)&host->pending_events);
215 node = debugfs_create_x32("completed_events", S_IRUSR, root,
216 (u32 *)&host->completed_events);
223 dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n");
225 #endif /* defined(CONFIG_DEBUG_FS) */
227 static void dw_mci_set_timeout(struct dw_mci *host)
229 /* timeout (maximum) */
230 mci_writel(host, TMOUT, 0xffffffff);
233 static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
235 struct mmc_data *data;
237 cmd->error = -EINPROGRESS;
241 if (cmdr == MMC_STOP_TRANSMISSION)
242 cmdr |= SDMMC_CMD_STOP;
244 cmdr |= SDMMC_CMD_PRV_DAT_WAIT;
246 if (cmd->flags & MMC_RSP_PRESENT) {
247 /* We expect a response, so set this bit */
248 cmdr |= SDMMC_CMD_RESP_EXP;
249 if (cmd->flags & MMC_RSP_136)
250 cmdr |= SDMMC_CMD_RESP_LONG;
253 if (cmd->flags & MMC_RSP_CRC)
254 cmdr |= SDMMC_CMD_RESP_CRC;
258 cmdr |= SDMMC_CMD_DAT_EXP;
259 if (data->flags & MMC_DATA_STREAM)
260 cmdr |= SDMMC_CMD_STRM_MODE;
261 if (data->flags & MMC_DATA_WRITE)
262 cmdr |= SDMMC_CMD_DAT_WR;
268 static void dw_mci_start_command(struct dw_mci *host,
269 struct mmc_command *cmd, u32 cmd_flags)
272 dev_vdbg(&host->pdev->dev,
273 "start command: ARGR=0x%08x CMDR=0x%08x\n",
274 cmd->arg, cmd_flags);
276 mci_writel(host, CMDARG, cmd->arg);
279 mci_writel(host, CMD, cmd_flags | SDMMC_CMD_START);
282 static void send_stop_cmd(struct dw_mci *host, struct mmc_data *data)
284 dw_mci_start_command(host, data->stop, host->stop_cmdr);
287 /* DMA interface functions */
288 static void dw_mci_stop_dma(struct dw_mci *host)
290 if (host->using_dma) {
291 host->dma_ops->stop(host);
292 host->dma_ops->cleanup(host);
294 /* Data transfer was stopped by the interrupt handler */
295 set_bit(EVENT_XFER_COMPLETE, &host->pending_events);
299 #ifdef CONFIG_MMC_DW_IDMAC
300 static void dw_mci_dma_cleanup(struct dw_mci *host)
302 struct mmc_data *data = host->data;
305 dma_unmap_sg(&host->pdev->dev, data->sg, data->sg_len,
306 ((data->flags & MMC_DATA_WRITE)
307 ? DMA_TO_DEVICE : DMA_FROM_DEVICE));
310 static void dw_mci_idmac_stop_dma(struct dw_mci *host)
314 /* Disable and reset the IDMAC interface */
315 temp = mci_readl(host, CTRL);
316 temp &= ~SDMMC_CTRL_USE_IDMAC;
317 temp |= SDMMC_CTRL_DMA_RESET;
318 mci_writel(host, CTRL, temp);
320 /* Stop the IDMAC running */
321 temp = mci_readl(host, BMOD);
322 temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);
323 mci_writel(host, BMOD, temp);
326 static void dw_mci_idmac_complete_dma(struct dw_mci *host)
328 struct mmc_data *data = host->data;
330 dev_vdbg(&host->pdev->dev, "DMA complete\n");
332 host->dma_ops->cleanup(host);
335 * If the card was removed, data will be NULL. No point in trying to
336 * send the stop command or waiting for NBUSY in this case.
339 set_bit(EVENT_XFER_COMPLETE, &host->pending_events);
340 tasklet_schedule(&host->tasklet);
344 static void dw_mci_translate_sglist(struct dw_mci *host, struct mmc_data *data,
348 struct idmac_desc *desc = host->sg_cpu;
350 for (i = 0; i < sg_len; i++, desc++) {
351 unsigned int length = sg_dma_len(&data->sg[i]);
352 u32 mem_addr = sg_dma_address(&data->sg[i]);
354 /* Set the OWN bit and disable interrupts for this descriptor */
355 desc->des0 = IDMAC_DES0_OWN | IDMAC_DES0_DIC | IDMAC_DES0_CH;
358 IDMAC_SET_BUFFER1_SIZE(desc, length);
360 /* Physical address to DMA to/from */
361 desc->des2 = mem_addr;
364 /* Set first descriptor */
366 desc->des0 |= IDMAC_DES0_FD;
368 /* Set last descriptor */
369 desc = host->sg_cpu + (i - 1) * sizeof(struct idmac_desc);
370 desc->des0 &= ~(IDMAC_DES0_CH | IDMAC_DES0_DIC);
371 desc->des0 |= IDMAC_DES0_LD;
376 static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)
380 dw_mci_translate_sglist(host, host->data, sg_len);
382 /* Select IDMAC interface */
383 temp = mci_readl(host, CTRL);
384 temp |= SDMMC_CTRL_USE_IDMAC;
385 mci_writel(host, CTRL, temp);
389 /* Enable the IDMAC */
390 temp = mci_readl(host, BMOD);
391 temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;
392 mci_writel(host, BMOD, temp);
394 /* Start it running */
395 mci_writel(host, PLDMND, 1);
398 static int dw_mci_idmac_init(struct dw_mci *host)
400 struct idmac_desc *p;
403 /* Number of descriptors in the ring buffer */
404 host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc);
406 /* Forward link the descriptor list */
407 for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++)
408 p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1));
410 /* Set the last descriptor as the end-of-ring descriptor */
411 p->des3 = host->sg_dma;
412 p->des0 = IDMAC_DES0_ER;
414 /* Mask out interrupts - get Tx & Rx complete only */
415 mci_writel(host, IDINTEN, SDMMC_IDMAC_INT_NI | SDMMC_IDMAC_INT_RI |
418 /* Set the descriptor base address */
419 mci_writel(host, DBADDR, host->sg_dma);
423 static struct dw_mci_dma_ops dw_mci_idmac_ops = {
424 .init = dw_mci_idmac_init,
425 .start = dw_mci_idmac_start_dma,
426 .stop = dw_mci_idmac_stop_dma,
427 .complete = dw_mci_idmac_complete_dma,
428 .cleanup = dw_mci_dma_cleanup,
430 #endif /* CONFIG_MMC_DW_IDMAC */
432 static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data)
434 struct scatterlist *sg;
435 unsigned int i, direction, sg_len;
440 /* If we don't have a channel, we can't do DMA */
445 * We don't do DMA on "complex" transfers, i.e. with
446 * non-word-aligned buffers or lengths. Also, we don't bother
447 * with all the DMA setup overhead for short transfers.
449 if (data->blocks * data->blksz < DW_MCI_DMA_THRESHOLD)
454 for_each_sg(data->sg, sg, data->sg_len, i) {
455 if (sg->offset & 3 || sg->length & 3)
461 if (data->flags & MMC_DATA_READ)
462 direction = DMA_FROM_DEVICE;
464 direction = DMA_TO_DEVICE;
466 sg_len = dma_map_sg(&host->pdev->dev, data->sg, data->sg_len,
469 dev_vdbg(&host->pdev->dev,
470 "sd sg_cpu: %#lx sg_dma: %#lx sg_len: %d\n",
471 (unsigned long)host->sg_cpu, (unsigned long)host->sg_dma,
474 /* Enable the DMA interface */
475 temp = mci_readl(host, CTRL);
476 temp |= SDMMC_CTRL_DMA_ENABLE;
477 mci_writel(host, CTRL, temp);
479 /* Disable RX/TX IRQs, let DMA handle it */
480 temp = mci_readl(host, INTMASK);
481 temp &= ~(SDMMC_INT_RXDR | SDMMC_INT_TXDR);
482 mci_writel(host, INTMASK, temp);
484 host->dma_ops->start(host, sg_len);
489 static void dw_mci_submit_data(struct dw_mci *host, struct mmc_data *data)
493 data->error = -EINPROGRESS;
499 if (data->flags & MMC_DATA_READ)
500 host->dir_status = DW_MCI_RECV_STATUS;
502 host->dir_status = DW_MCI_SEND_STATUS;
504 if (dw_mci_submit_data_dma(host, data)) {
506 host->pio_offset = 0;
507 host->part_buf_start = 0;
508 host->part_buf_count = 0;
510 mci_writel(host, RINTSTS, SDMMC_INT_TXDR | SDMMC_INT_RXDR);
511 temp = mci_readl(host, INTMASK);
512 temp |= SDMMC_INT_TXDR | SDMMC_INT_RXDR;
513 mci_writel(host, INTMASK, temp);
515 temp = mci_readl(host, CTRL);
516 temp &= ~SDMMC_CTRL_DMA_ENABLE;
517 mci_writel(host, CTRL, temp);
521 static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg)
523 struct dw_mci *host = slot->host;
524 unsigned long timeout = jiffies + msecs_to_jiffies(500);
525 unsigned int cmd_status = 0;
527 mci_writel(host, CMDARG, arg);
529 mci_writel(host, CMD, SDMMC_CMD_START | cmd);
531 while (time_before(jiffies, timeout)) {
532 cmd_status = mci_readl(host, CMD);
533 if (!(cmd_status & SDMMC_CMD_START))
536 dev_err(&slot->mmc->class_dev,
537 "Timeout sending command (cmd %#x arg %#x status %#x)\n",
538 cmd, arg, cmd_status);
541 static void dw_mci_setup_bus(struct dw_mci_slot *slot)
543 struct dw_mci *host = slot->host;
546 if (slot->clock != host->current_speed) {
547 if (host->bus_hz % slot->clock)
549 * move the + 1 after the divide to prevent
550 * over-clocking the card.
552 div = ((host->bus_hz / slot->clock) >> 1) + 1;
554 div = (host->bus_hz / slot->clock) >> 1;
556 dev_info(&slot->mmc->class_dev,
557 "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ"
558 " div = %d)\n", slot->id, host->bus_hz, slot->clock,
559 div ? ((host->bus_hz / div) >> 1) : host->bus_hz, div);
562 mci_writel(host, CLKENA, 0);
563 mci_writel(host, CLKSRC, 0);
567 SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0);
569 /* set clock to desired speed */
570 mci_writel(host, CLKDIV, div);
574 SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0);
577 mci_writel(host, CLKENA, SDMMC_CLKEN_ENABLE |
578 SDMMC_CLKEN_LOW_PWR);
582 SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0);
584 host->current_speed = slot->clock;
587 /* Set the current slot bus width */
588 mci_writel(host, CTYPE, (slot->ctype << slot->id));
591 static void dw_mci_start_request(struct dw_mci *host,
592 struct dw_mci_slot *slot)
594 struct mmc_request *mrq;
595 struct mmc_command *cmd;
596 struct mmc_data *data;
600 if (host->pdata->select_slot)
601 host->pdata->select_slot(slot->id);
603 /* Slot specific timing and width adjustment */
604 dw_mci_setup_bus(slot);
606 host->cur_slot = slot;
609 host->pending_events = 0;
610 host->completed_events = 0;
611 host->data_status = 0;
615 dw_mci_set_timeout(host);
616 mci_writel(host, BYTCNT, data->blksz*data->blocks);
617 mci_writel(host, BLKSIZ, data->blksz);
621 cmdflags = dw_mci_prepare_command(slot->mmc, cmd);
623 /* this is the first command, send the initialization clock */
624 if (test_and_clear_bit(DW_MMC_CARD_NEED_INIT, &slot->flags))
625 cmdflags |= SDMMC_CMD_INIT;
628 dw_mci_submit_data(host, data);
632 dw_mci_start_command(host, cmd, cmdflags);
635 host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop);
638 /* must be called with host->lock held */
639 static void dw_mci_queue_request(struct dw_mci *host, struct dw_mci_slot *slot,
640 struct mmc_request *mrq)
642 dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n",
647 if (host->state == STATE_IDLE) {
648 host->state = STATE_SENDING_CMD;
649 dw_mci_start_request(host, slot);
651 list_add_tail(&slot->queue_node, &host->queue);
655 static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
657 struct dw_mci_slot *slot = mmc_priv(mmc);
658 struct dw_mci *host = slot->host;
663 * The check for card presence and queueing of the request must be
664 * atomic, otherwise the card could be removed in between and the
665 * request wouldn't fail until another card was inserted.
667 spin_lock_bh(&host->lock);
669 if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) {
670 spin_unlock_bh(&host->lock);
671 mrq->cmd->error = -ENOMEDIUM;
672 mmc_request_done(mmc, mrq);
676 dw_mci_queue_request(host, slot, mrq);
678 spin_unlock_bh(&host->lock);
681 static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
683 struct dw_mci_slot *slot = mmc_priv(mmc);
686 /* set default 1 bit mode */
687 slot->ctype = SDMMC_CTYPE_1BIT;
689 switch (ios->bus_width) {
690 case MMC_BUS_WIDTH_1:
691 slot->ctype = SDMMC_CTYPE_1BIT;
693 case MMC_BUS_WIDTH_4:
694 slot->ctype = SDMMC_CTYPE_4BIT;
696 case MMC_BUS_WIDTH_8:
697 slot->ctype = SDMMC_CTYPE_8BIT;
702 if (ios->timing == MMC_TIMING_UHS_DDR50) {
703 regs = mci_readl(slot->host, UHS_REG);
704 regs |= (0x1 << slot->id) << 16;
705 mci_writel(slot->host, UHS_REG, regs);
710 * Use mirror of ios->clock to prevent race with mmc
711 * core ios update when finding the minimum.
713 slot->clock = ios->clock;
716 switch (ios->power_mode) {
718 set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags);
725 static int dw_mci_get_ro(struct mmc_host *mmc)
728 struct dw_mci_slot *slot = mmc_priv(mmc);
729 struct dw_mci_board *brd = slot->host->pdata;
731 /* Use platform get_ro function, else try on board write protect */
733 read_only = brd->get_ro(slot->id);
736 mci_readl(slot->host, WRTPRT) & (1 << slot->id) ? 1 : 0;
738 dev_dbg(&mmc->class_dev, "card is %s\n",
739 read_only ? "read-only" : "read-write");
744 static int dw_mci_get_cd(struct mmc_host *mmc)
747 struct dw_mci_slot *slot = mmc_priv(mmc);
748 struct dw_mci_board *brd = slot->host->pdata;
750 /* Use platform get_cd function, else try onboard card detect */
751 if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION)
753 else if (brd->get_cd)
754 present = !brd->get_cd(slot->id);
756 present = (mci_readl(slot->host, CDETECT) & (1 << slot->id))
760 dev_dbg(&mmc->class_dev, "card is present\n");
762 dev_dbg(&mmc->class_dev, "card is not present\n");
767 static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
769 struct dw_mci_slot *slot = mmc_priv(mmc);
770 struct dw_mci *host = slot->host;
773 /* Enable/disable Slot Specific SDIO interrupt */
774 int_mask = mci_readl(host, INTMASK);
776 mci_writel(host, INTMASK,
777 (int_mask | (1 << SDMMC_INT_SDIO(slot->id))));
779 mci_writel(host, INTMASK,
780 (int_mask & ~(1 << SDMMC_INT_SDIO(slot->id))));
784 static const struct mmc_host_ops dw_mci_ops = {
785 .request = dw_mci_request,
786 .set_ios = dw_mci_set_ios,
787 .get_ro = dw_mci_get_ro,
788 .get_cd = dw_mci_get_cd,
789 .enable_sdio_irq = dw_mci_enable_sdio_irq,
792 static void dw_mci_request_end(struct dw_mci *host, struct mmc_request *mrq)
793 __releases(&host->lock)
794 __acquires(&host->lock)
796 struct dw_mci_slot *slot;
797 struct mmc_host *prev_mmc = host->cur_slot->mmc;
799 WARN_ON(host->cmd || host->data);
801 host->cur_slot->mrq = NULL;
803 if (!list_empty(&host->queue)) {
804 slot = list_entry(host->queue.next,
805 struct dw_mci_slot, queue_node);
806 list_del(&slot->queue_node);
807 dev_vdbg(&host->pdev->dev, "list not empty: %s is next\n",
808 mmc_hostname(slot->mmc));
809 host->state = STATE_SENDING_CMD;
810 dw_mci_start_request(host, slot);
812 dev_vdbg(&host->pdev->dev, "list empty\n");
813 host->state = STATE_IDLE;
816 spin_unlock(&host->lock);
817 mmc_request_done(prev_mmc, mrq);
818 spin_lock(&host->lock);
821 static void dw_mci_command_complete(struct dw_mci *host, struct mmc_command *cmd)
823 u32 status = host->cmd_status;
825 host->cmd_status = 0;
827 /* Read the response from the card (up to 16 bytes) */
828 if (cmd->flags & MMC_RSP_PRESENT) {
829 if (cmd->flags & MMC_RSP_136) {
830 cmd->resp[3] = mci_readl(host, RESP0);
831 cmd->resp[2] = mci_readl(host, RESP1);
832 cmd->resp[1] = mci_readl(host, RESP2);
833 cmd->resp[0] = mci_readl(host, RESP3);
835 cmd->resp[0] = mci_readl(host, RESP0);
842 if (status & SDMMC_INT_RTO)
843 cmd->error = -ETIMEDOUT;
844 else if ((cmd->flags & MMC_RSP_CRC) && (status & SDMMC_INT_RCRC))
845 cmd->error = -EILSEQ;
846 else if (status & SDMMC_INT_RESP_ERR)
852 /* newer ip versions need a delay between retries */
853 if (host->quirks & DW_MCI_QUIRK_RETRY_DELAY)
858 dw_mci_stop_dma(host);
863 static void dw_mci_tasklet_func(unsigned long priv)
865 struct dw_mci *host = (struct dw_mci *)priv;
866 struct mmc_data *data;
867 struct mmc_command *cmd;
868 enum dw_mci_state state;
869 enum dw_mci_state prev_state;
872 spin_lock(&host->lock);
884 case STATE_SENDING_CMD:
885 if (!test_and_clear_bit(EVENT_CMD_COMPLETE,
886 &host->pending_events))
891 set_bit(EVENT_CMD_COMPLETE, &host->completed_events);
892 dw_mci_command_complete(host, host->mrq->cmd);
893 if (!host->mrq->data || cmd->error) {
894 dw_mci_request_end(host, host->mrq);
898 prev_state = state = STATE_SENDING_DATA;
901 case STATE_SENDING_DATA:
902 if (test_and_clear_bit(EVENT_DATA_ERROR,
903 &host->pending_events)) {
904 dw_mci_stop_dma(host);
906 send_stop_cmd(host, data);
907 state = STATE_DATA_ERROR;
911 if (!test_and_clear_bit(EVENT_XFER_COMPLETE,
912 &host->pending_events))
915 set_bit(EVENT_XFER_COMPLETE, &host->completed_events);
916 prev_state = state = STATE_DATA_BUSY;
919 case STATE_DATA_BUSY:
920 if (!test_and_clear_bit(EVENT_DATA_COMPLETE,
921 &host->pending_events))
925 set_bit(EVENT_DATA_COMPLETE, &host->completed_events);
926 status = host->data_status;
928 if (status & DW_MCI_DATA_ERROR_FLAGS) {
929 if (status & SDMMC_INT_DTO) {
930 data->error = -ETIMEDOUT;
931 } else if (status & SDMMC_INT_DCRC) {
932 data->error = -EILSEQ;
933 } else if (status & SDMMC_INT_EBE &&
935 DW_MCI_SEND_STATUS) {
937 * No data CRC status was returned.
938 * The number of bytes transferred will
939 * be exaggerated in PIO mode.
941 data->bytes_xfered = 0;
942 data->error = -ETIMEDOUT;
944 dev_err(&host->pdev->dev,
951 * After an error, there may be data lingering
952 * in the FIFO, so reset it - doing so
953 * generates a block interrupt, hence setting
954 * the scatter-gather pointer to NULL.
957 ctrl = mci_readl(host, CTRL);
958 ctrl |= SDMMC_CTRL_FIFO_RESET;
959 mci_writel(host, CTRL, ctrl);
961 data->bytes_xfered = data->blocks * data->blksz;
966 dw_mci_request_end(host, host->mrq);
970 prev_state = state = STATE_SENDING_STOP;
972 send_stop_cmd(host, data);
975 case STATE_SENDING_STOP:
976 if (!test_and_clear_bit(EVENT_CMD_COMPLETE,
977 &host->pending_events))
981 dw_mci_command_complete(host, host->mrq->stop);
982 dw_mci_request_end(host, host->mrq);
985 case STATE_DATA_ERROR:
986 if (!test_and_clear_bit(EVENT_XFER_COMPLETE,
987 &host->pending_events))
990 state = STATE_DATA_BUSY;
993 } while (state != prev_state);
997 spin_unlock(&host->lock);
1001 /* push final bytes to part_buf, only use during push */
1002 static void dw_mci_set_part_bytes(struct dw_mci *host, void *buf, int cnt)
1004 memcpy((void *)&host->part_buf, buf, cnt);
1005 host->part_buf_count = cnt;
1008 /* append bytes to part_buf, only use during push */
1009 static int dw_mci_push_part_bytes(struct dw_mci *host, void *buf, int cnt)
1011 cnt = min(cnt, (1 << host->data_shift) - host->part_buf_count);
1012 memcpy((void *)&host->part_buf + host->part_buf_count, buf, cnt);
1013 host->part_buf_count += cnt;
1017 /* pull first bytes from part_buf, only use during pull */
1018 static int dw_mci_pull_part_bytes(struct dw_mci *host, void *buf, int cnt)
1020 cnt = min(cnt, (int)host->part_buf_count);
1022 memcpy(buf, (void *)&host->part_buf + host->part_buf_start,
1024 host->part_buf_count -= cnt;
1025 host->part_buf_start += cnt;
1030 /* pull final bytes from the part_buf, assuming it's just been filled */
1031 static void dw_mci_pull_final_bytes(struct dw_mci *host, void *buf, int cnt)
1033 memcpy(buf, &host->part_buf, cnt);
1034 host->part_buf_start = cnt;
1035 host->part_buf_count = (1 << host->data_shift) - cnt;
1038 static void dw_mci_push_data16(struct dw_mci *host, void *buf, int cnt)
1040 /* try and push anything in the part_buf */
1041 if (unlikely(host->part_buf_count)) {
1042 int len = dw_mci_push_part_bytes(host, buf, cnt);
1045 if (!sg_next(host->sg) || host->part_buf_count == 2) {
1046 mci_writew(host, DATA(host->data_offset),
1048 host->part_buf_count = 0;
1051 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1052 if (unlikely((unsigned long)buf & 0x1)) {
1054 u16 aligned_buf[64];
1055 int len = min(cnt & -2, (int)sizeof(aligned_buf));
1056 int items = len >> 1;
1058 /* memcpy from input buffer into aligned buffer */
1059 memcpy(aligned_buf, buf, len);
1062 /* push data from aligned buffer into fifo */
1063 for (i = 0; i < items; ++i)
1064 mci_writew(host, DATA(host->data_offset),
1071 for (; cnt >= 2; cnt -= 2)
1072 mci_writew(host, DATA(host->data_offset), *pdata++);
1075 /* put anything remaining in the part_buf */
1077 dw_mci_set_part_bytes(host, buf, cnt);
1078 if (!sg_next(host->sg))
1079 mci_writew(host, DATA(host->data_offset),
1084 static void dw_mci_pull_data16(struct dw_mci *host, void *buf, int cnt)
1086 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1087 if (unlikely((unsigned long)buf & 0x1)) {
1089 /* pull data from fifo into aligned buffer */
1090 u16 aligned_buf[64];
1091 int len = min(cnt & -2, (int)sizeof(aligned_buf));
1092 int items = len >> 1;
1094 for (i = 0; i < items; ++i)
1095 aligned_buf[i] = mci_readw(host,
1096 DATA(host->data_offset));
1097 /* memcpy from aligned buffer into output buffer */
1098 memcpy(buf, aligned_buf, len);
1106 for (; cnt >= 2; cnt -= 2)
1107 *pdata++ = mci_readw(host, DATA(host->data_offset));
1111 host->part_buf16 = mci_readw(host, DATA(host->data_offset));
1112 dw_mci_pull_final_bytes(host, buf, cnt);
1116 static void dw_mci_push_data32(struct dw_mci *host, void *buf, int cnt)
1118 /* try and push anything in the part_buf */
1119 if (unlikely(host->part_buf_count)) {
1120 int len = dw_mci_push_part_bytes(host, buf, cnt);
1123 if (!sg_next(host->sg) || host->part_buf_count == 4) {
1124 mci_writel(host, DATA(host->data_offset),
1126 host->part_buf_count = 0;
1129 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1130 if (unlikely((unsigned long)buf & 0x3)) {
1132 u32 aligned_buf[32];
1133 int len = min(cnt & -4, (int)sizeof(aligned_buf));
1134 int items = len >> 2;
1136 /* memcpy from input buffer into aligned buffer */
1137 memcpy(aligned_buf, buf, len);
1140 /* push data from aligned buffer into fifo */
1141 for (i = 0; i < items; ++i)
1142 mci_writel(host, DATA(host->data_offset),
1149 for (; cnt >= 4; cnt -= 4)
1150 mci_writel(host, DATA(host->data_offset), *pdata++);
1153 /* put anything remaining in the part_buf */
1155 dw_mci_set_part_bytes(host, buf, cnt);
1156 if (!sg_next(host->sg))
1157 mci_writel(host, DATA(host->data_offset),
1162 static void dw_mci_pull_data32(struct dw_mci *host, void *buf, int cnt)
1164 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1165 if (unlikely((unsigned long)buf & 0x3)) {
1167 /* pull data from fifo into aligned buffer */
1168 u32 aligned_buf[32];
1169 int len = min(cnt & -4, (int)sizeof(aligned_buf));
1170 int items = len >> 2;
1172 for (i = 0; i < items; ++i)
1173 aligned_buf[i] = mci_readl(host,
1174 DATA(host->data_offset));
1175 /* memcpy from aligned buffer into output buffer */
1176 memcpy(buf, aligned_buf, len);
1184 for (; cnt >= 4; cnt -= 4)
1185 *pdata++ = mci_readl(host, DATA(host->data_offset));
1189 host->part_buf32 = mci_readl(host, DATA(host->data_offset));
1190 dw_mci_pull_final_bytes(host, buf, cnt);
1194 static void dw_mci_push_data64(struct dw_mci *host, void *buf, int cnt)
1196 /* try and push anything in the part_buf */
1197 if (unlikely(host->part_buf_count)) {
1198 int len = dw_mci_push_part_bytes(host, buf, cnt);
1201 if (!sg_next(host->sg) || host->part_buf_count == 8) {
1202 mci_writew(host, DATA(host->data_offset),
1204 host->part_buf_count = 0;
1207 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1208 if (unlikely((unsigned long)buf & 0x7)) {
1210 u64 aligned_buf[16];
1211 int len = min(cnt & -8, (int)sizeof(aligned_buf));
1212 int items = len >> 3;
1214 /* memcpy from input buffer into aligned buffer */
1215 memcpy(aligned_buf, buf, len);
1218 /* push data from aligned buffer into fifo */
1219 for (i = 0; i < items; ++i)
1220 mci_writeq(host, DATA(host->data_offset),
1227 for (; cnt >= 8; cnt -= 8)
1228 mci_writeq(host, DATA(host->data_offset), *pdata++);
1231 /* put anything remaining in the part_buf */
1233 dw_mci_set_part_bytes(host, buf, cnt);
1234 if (!sg_next(host->sg))
1235 mci_writeq(host, DATA(host->data_offset),
1240 static void dw_mci_pull_data64(struct dw_mci *host, void *buf, int cnt)
1242 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
1243 if (unlikely((unsigned long)buf & 0x7)) {
1245 /* pull data from fifo into aligned buffer */
1246 u64 aligned_buf[16];
1247 int len = min(cnt & -8, (int)sizeof(aligned_buf));
1248 int items = len >> 3;
1250 for (i = 0; i < items; ++i)
1251 aligned_buf[i] = mci_readq(host,
1252 DATA(host->data_offset));
1253 /* memcpy from aligned buffer into output buffer */
1254 memcpy(buf, aligned_buf, len);
1262 for (; cnt >= 8; cnt -= 8)
1263 *pdata++ = mci_readq(host, DATA(host->data_offset));
1267 host->part_buf = mci_readq(host, DATA(host->data_offset));
1268 dw_mci_pull_final_bytes(host, buf, cnt);
1272 static void dw_mci_pull_data(struct dw_mci *host, void *buf, int cnt)
1276 /* get remaining partial bytes */
1277 len = dw_mci_pull_part_bytes(host, buf, cnt);
1278 if (unlikely(len == cnt))
1283 /* get the rest of the data */
1284 host->pull_data(host, buf, cnt);
1287 static void dw_mci_read_data_pio(struct dw_mci *host)
1289 struct scatterlist *sg = host->sg;
1290 void *buf = sg_virt(sg);
1291 unsigned int offset = host->pio_offset;
1292 struct mmc_data *data = host->data;
1293 int shift = host->data_shift;
1295 unsigned int nbytes = 0, len;
1298 len = host->part_buf_count +
1299 (SDMMC_GET_FCNT(mci_readl(host, STATUS)) << shift);
1300 if (offset + len <= sg->length) {
1301 dw_mci_pull_data(host, (void *)(buf + offset), len);
1306 if (offset == sg->length) {
1307 flush_dcache_page(sg_page(sg));
1308 host->sg = sg = sg_next(sg);
1316 unsigned int remaining = sg->length - offset;
1317 dw_mci_pull_data(host, (void *)(buf + offset),
1319 nbytes += remaining;
1321 flush_dcache_page(sg_page(sg));
1322 host->sg = sg = sg_next(sg);
1326 offset = len - remaining;
1328 dw_mci_pull_data(host, buf, offset);
1332 status = mci_readl(host, MINTSTS);
1333 mci_writel(host, RINTSTS, SDMMC_INT_RXDR);
1334 if (status & DW_MCI_DATA_ERROR_FLAGS) {
1335 host->data_status = status;
1336 data->bytes_xfered += nbytes;
1339 set_bit(EVENT_DATA_ERROR, &host->pending_events);
1341 tasklet_schedule(&host->tasklet);
1344 } while (status & SDMMC_INT_RXDR); /*if the RXDR is ready read again*/
1345 host->pio_offset = offset;
1346 data->bytes_xfered += nbytes;
1350 data->bytes_xfered += nbytes;
1352 set_bit(EVENT_XFER_COMPLETE, &host->pending_events);
1355 static void dw_mci_write_data_pio(struct dw_mci *host)
1357 struct scatterlist *sg = host->sg;
1358 void *buf = sg_virt(sg);
1359 unsigned int offset = host->pio_offset;
1360 struct mmc_data *data = host->data;
1361 int shift = host->data_shift;
1363 unsigned int nbytes = 0, len;
1366 len = ((host->fifo_depth -
1367 SDMMC_GET_FCNT(mci_readl(host, STATUS))) << shift)
1368 - host->part_buf_count;
1369 if (offset + len <= sg->length) {
1370 host->push_data(host, (void *)(buf + offset), len);
1374 if (offset == sg->length) {
1375 host->sg = sg = sg_next(sg);
1383 unsigned int remaining = sg->length - offset;
1385 host->push_data(host, (void *)(buf + offset),
1387 nbytes += remaining;
1389 host->sg = sg = sg_next(sg);
1393 offset = len - remaining;
1395 host->push_data(host, (void *)buf, offset);
1399 status = mci_readl(host, MINTSTS);
1400 mci_writel(host, RINTSTS, SDMMC_INT_TXDR);
1401 if (status & DW_MCI_DATA_ERROR_FLAGS) {
1402 host->data_status = status;
1403 data->bytes_xfered += nbytes;
1407 set_bit(EVENT_DATA_ERROR, &host->pending_events);
1409 tasklet_schedule(&host->tasklet);
1412 } while (status & SDMMC_INT_TXDR); /* if TXDR write again */
1413 host->pio_offset = offset;
1414 data->bytes_xfered += nbytes;
1418 data->bytes_xfered += nbytes;
1420 set_bit(EVENT_XFER_COMPLETE, &host->pending_events);
1423 static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status)
1425 if (!host->cmd_status)
1426 host->cmd_status = status;
1430 set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
1431 tasklet_schedule(&host->tasklet);
1434 static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
1436 struct dw_mci *host = dev_id;
1437 u32 status, pending;
1438 unsigned int pass_count = 0;
1442 status = mci_readl(host, RINTSTS);
1443 pending = mci_readl(host, MINTSTS); /* read-only mask reg */
1446 * DTO fix - version 2.10a and below, and only if internal DMA
1449 if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO) {
1451 ((mci_readl(host, STATUS) >> 17) & 0x1fff))
1452 pending |= SDMMC_INT_DATA_OVER;
1458 if (pending & DW_MCI_CMD_ERROR_FLAGS) {
1459 mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS);
1460 host->cmd_status = status;
1462 set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
1465 if (pending & DW_MCI_DATA_ERROR_FLAGS) {
1466 /* if there is an error report DATA_ERROR */
1467 mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS);
1468 host->data_status = status;
1470 set_bit(EVENT_DATA_ERROR, &host->pending_events);
1471 if (!(pending & (SDMMC_INT_DTO | SDMMC_INT_DCRC |
1472 SDMMC_INT_SBE | SDMMC_INT_EBE)))
1473 tasklet_schedule(&host->tasklet);
1476 if (pending & SDMMC_INT_DATA_OVER) {
1477 mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER);
1478 if (!host->data_status)
1479 host->data_status = status;
1481 if (host->dir_status == DW_MCI_RECV_STATUS) {
1482 if (host->sg != NULL)
1483 dw_mci_read_data_pio(host);
1485 set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
1486 tasklet_schedule(&host->tasklet);
1489 if (pending & SDMMC_INT_RXDR) {
1490 mci_writel(host, RINTSTS, SDMMC_INT_RXDR);
1491 if (host->dir_status == DW_MCI_RECV_STATUS && host->sg)
1492 dw_mci_read_data_pio(host);
1495 if (pending & SDMMC_INT_TXDR) {
1496 mci_writel(host, RINTSTS, SDMMC_INT_TXDR);
1497 if (host->dir_status == DW_MCI_SEND_STATUS && host->sg)
1498 dw_mci_write_data_pio(host);
1501 if (pending & SDMMC_INT_CMD_DONE) {
1502 mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE);
1503 dw_mci_cmd_interrupt(host, status);
1506 if (pending & SDMMC_INT_CD) {
1507 mci_writel(host, RINTSTS, SDMMC_INT_CD);
1508 queue_work(dw_mci_card_workqueue, &host->card_work);
1511 /* Handle SDIO Interrupts */
1512 for (i = 0; i < host->num_slots; i++) {
1513 struct dw_mci_slot *slot = host->slot[i];
1514 if (pending & SDMMC_INT_SDIO(i)) {
1515 mci_writel(host, RINTSTS, SDMMC_INT_SDIO(i));
1516 mmc_signal_sdio_irq(slot->mmc);
1520 } while (pass_count++ < 5);
1522 #ifdef CONFIG_MMC_DW_IDMAC
1523 /* Handle DMA interrupts */
1524 pending = mci_readl(host, IDSTS);
1525 if (pending & (SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI)) {
1526 mci_writel(host, IDSTS, SDMMC_IDMAC_INT_TI | SDMMC_IDMAC_INT_RI);
1527 mci_writel(host, IDSTS, SDMMC_IDMAC_INT_NI);
1528 set_bit(EVENT_DATA_COMPLETE, &host->pending_events);
1529 host->dma_ops->complete(host);
1536 static void dw_mci_work_routine_card(struct work_struct *work)
1538 struct dw_mci *host = container_of(work, struct dw_mci, card_work);
1541 for (i = 0; i < host->num_slots; i++) {
1542 struct dw_mci_slot *slot = host->slot[i];
1543 struct mmc_host *mmc = slot->mmc;
1544 struct mmc_request *mrq;
1548 present = dw_mci_get_cd(mmc);
1549 while (present != slot->last_detect_state) {
1550 dev_dbg(&slot->mmc->class_dev, "card %s\n",
1551 present ? "inserted" : "removed");
1553 /* Power up slot (before spin_lock, may sleep) */
1554 if (present != 0 && host->pdata->setpower)
1555 host->pdata->setpower(slot->id, mmc->ocr_avail);
1557 spin_lock_bh(&host->lock);
1559 /* Card change detected */
1560 slot->last_detect_state = present;
1562 /* Mark card as present if applicable */
1564 set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
1566 /* Clean up queue if present */
1569 if (mrq == host->mrq) {
1573 switch (host->state) {
1576 case STATE_SENDING_CMD:
1577 mrq->cmd->error = -ENOMEDIUM;
1581 case STATE_SENDING_DATA:
1582 mrq->data->error = -ENOMEDIUM;
1583 dw_mci_stop_dma(host);
1585 case STATE_DATA_BUSY:
1586 case STATE_DATA_ERROR:
1587 if (mrq->data->error == -EINPROGRESS)
1588 mrq->data->error = -ENOMEDIUM;
1592 case STATE_SENDING_STOP:
1593 mrq->stop->error = -ENOMEDIUM;
1597 dw_mci_request_end(host, mrq);
1599 list_del(&slot->queue_node);
1600 mrq->cmd->error = -ENOMEDIUM;
1602 mrq->data->error = -ENOMEDIUM;
1604 mrq->stop->error = -ENOMEDIUM;
1606 spin_unlock(&host->lock);
1607 mmc_request_done(slot->mmc, mrq);
1608 spin_lock(&host->lock);
1612 /* Power down slot */
1614 clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
1617 * Clear down the FIFO - doing so generates a
1618 * block interrupt, hence setting the
1619 * scatter-gather pointer to NULL.
1623 ctrl = mci_readl(host, CTRL);
1624 ctrl |= SDMMC_CTRL_FIFO_RESET;
1625 mci_writel(host, CTRL, ctrl);
1627 #ifdef CONFIG_MMC_DW_IDMAC
1628 ctrl = mci_readl(host, BMOD);
1629 ctrl |= 0x01; /* Software reset of DMA */
1630 mci_writel(host, BMOD, ctrl);
1635 spin_unlock_bh(&host->lock);
1637 /* Power down slot (after spin_unlock, may sleep) */
1638 if (present == 0 && host->pdata->setpower)
1639 host->pdata->setpower(slot->id, 0);
1641 present = dw_mci_get_cd(mmc);
1644 mmc_detect_change(slot->mmc,
1645 msecs_to_jiffies(host->pdata->detect_delay_ms));
1649 static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
1651 struct mmc_host *mmc;
1652 struct dw_mci_slot *slot;
1654 mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), &host->pdev->dev);
1658 slot = mmc_priv(mmc);
1663 mmc->ops = &dw_mci_ops;
1664 mmc->f_min = DIV_ROUND_UP(host->bus_hz, 510);
1665 mmc->f_max = host->bus_hz;
1667 if (host->pdata->get_ocr)
1668 mmc->ocr_avail = host->pdata->get_ocr(id);
1670 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
1673 * Start with slot power disabled, it will be enabled when a card
1676 if (host->pdata->setpower)
1677 host->pdata->setpower(id, 0);
1679 if (host->pdata->caps)
1680 mmc->caps = host->pdata->caps;
1684 if (host->pdata->get_bus_wd)
1685 if (host->pdata->get_bus_wd(slot->id) >= 4)
1686 mmc->caps |= MMC_CAP_4_BIT_DATA;
1688 if (host->pdata->quirks & DW_MCI_QUIRK_HIGHSPEED)
1689 mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
1691 #ifdef CONFIG_MMC_DW_IDMAC
1692 mmc->max_segs = host->ring_size;
1693 mmc->max_blk_size = 65536;
1694 mmc->max_blk_count = host->ring_size;
1695 mmc->max_seg_size = 0x1000;
1696 mmc->max_req_size = mmc->max_seg_size * mmc->max_blk_count;
1698 if (host->pdata->blk_settings) {
1699 mmc->max_segs = host->pdata->blk_settings->max_segs;
1700 mmc->max_blk_size = host->pdata->blk_settings->max_blk_size;
1701 mmc->max_blk_count = host->pdata->blk_settings->max_blk_count;
1702 mmc->max_req_size = host->pdata->blk_settings->max_req_size;
1703 mmc->max_seg_size = host->pdata->blk_settings->max_seg_size;
1705 /* Useful defaults if platform data is unset. */
1707 mmc->max_blk_size = 65536; /* BLKSIZ is 16 bits */
1708 mmc->max_blk_count = 512;
1709 mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
1710 mmc->max_seg_size = mmc->max_req_size;
1712 #endif /* CONFIG_MMC_DW_IDMAC */
1714 host->vmmc = regulator_get(mmc_dev(mmc), "vmmc");
1715 if (IS_ERR(host->vmmc)) {
1716 pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
1719 regulator_enable(host->vmmc);
1721 if (dw_mci_get_cd(mmc))
1722 set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
1724 clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
1726 host->slot[id] = slot;
1729 #if defined(CONFIG_DEBUG_FS)
1730 dw_mci_init_debugfs(slot);
1733 /* Card initially undetected */
1734 slot->last_detect_state = 0;
1737 * Card may have been plugged in prior to boot so we
1738 * need to run the detect tasklet
1740 queue_work(dw_mci_card_workqueue, &host->card_work);
1745 static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
1747 /* Shutdown detect IRQ */
1748 if (slot->host->pdata->exit)
1749 slot->host->pdata->exit(id);
1751 /* Debugfs stuff is cleaned up by mmc core */
1752 mmc_remove_host(slot->mmc);
1753 slot->host->slot[id] = NULL;
1754 mmc_free_host(slot->mmc);
1757 static void dw_mci_init_dma(struct dw_mci *host)
1759 /* Alloc memory for sg translation */
1760 host->sg_cpu = dma_alloc_coherent(&host->pdev->dev, PAGE_SIZE,
1761 &host->sg_dma, GFP_KERNEL);
1762 if (!host->sg_cpu) {
1763 dev_err(&host->pdev->dev, "%s: could not alloc DMA memory\n",
1768 /* Determine which DMA interface to use */
1769 #ifdef CONFIG_MMC_DW_IDMAC
1770 host->dma_ops = &dw_mci_idmac_ops;
1771 dev_info(&host->pdev->dev, "Using internal DMA controller.\n");
1777 if (host->dma_ops->init) {
1778 if (host->dma_ops->init(host)) {
1779 dev_err(&host->pdev->dev, "%s: Unable to initialize "
1780 "DMA Controller.\n", __func__);
1784 dev_err(&host->pdev->dev, "DMA initialization not found.\n");
1792 dev_info(&host->pdev->dev, "Using PIO mode.\n");
1797 static bool mci_wait_reset(struct device *dev, struct dw_mci *host)
1799 unsigned long timeout = jiffies + msecs_to_jiffies(500);
1802 mci_writel(host, CTRL, (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET |
1803 SDMMC_CTRL_DMA_RESET));
1805 /* wait till resets clear */
1807 ctrl = mci_readl(host, CTRL);
1808 if (!(ctrl & (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET |
1809 SDMMC_CTRL_DMA_RESET)))
1811 } while (time_before(jiffies, timeout));
1813 dev_err(dev, "Timeout resetting block (ctrl %#x)\n", ctrl);
1818 static int dw_mci_probe(struct platform_device *pdev)
1820 struct dw_mci *host;
1821 struct resource *regs;
1822 struct dw_mci_board *pdata;
1823 int irq, ret, i, width;
1826 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1830 irq = platform_get_irq(pdev, 0);
1834 host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
1839 host->pdata = pdata = pdev->dev.platform_data;
1840 if (!pdata || !pdata->init) {
1842 "Platform data must supply init function\n");
1847 if (!pdata->select_slot && pdata->num_slots > 1) {
1849 "Platform data must supply select_slot function\n");
1854 if (!pdata->bus_hz) {
1856 "Platform data must supply bus speed\n");
1861 host->bus_hz = pdata->bus_hz;
1862 host->quirks = pdata->quirks;
1864 spin_lock_init(&host->lock);
1865 INIT_LIST_HEAD(&host->queue);
1868 host->regs = ioremap(regs->start, resource_size(regs));
1872 host->dma_ops = pdata->dma_ops;
1873 dw_mci_init_dma(host);
1876 * Get the host data width - this assumes that HCON has been set with
1877 * the correct values.
1879 i = (mci_readl(host, HCON) >> 7) & 0x7;
1881 host->push_data = dw_mci_push_data16;
1882 host->pull_data = dw_mci_pull_data16;
1884 host->data_shift = 1;
1885 } else if (i == 2) {
1886 host->push_data = dw_mci_push_data64;
1887 host->pull_data = dw_mci_pull_data64;
1889 host->data_shift = 3;
1891 /* Check for a reserved value, and warn if it is */
1893 "HCON reports a reserved host data width!\n"
1894 "Defaulting to 32-bit access.\n");
1895 host->push_data = dw_mci_push_data32;
1896 host->pull_data = dw_mci_pull_data32;
1898 host->data_shift = 2;
1901 /* Reset all blocks */
1902 if (!mci_wait_reset(&pdev->dev, host)) {
1907 /* Clear the interrupts for the host controller */
1908 mci_writel(host, RINTSTS, 0xFFFFFFFF);
1909 mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
1911 /* Put in max timeout */
1912 mci_writel(host, TMOUT, 0xFFFFFFFF);
1915 * FIFO threshold settings RxMark = fifo_size / 2 - 1,
1916 * Tx Mark = fifo_size / 2 DMA Size = 8
1918 if (!host->pdata->fifo_depth) {
1920 * Power-on value of RX_WMark is FIFO_DEPTH-1, but this may
1921 * have been overwritten by the bootloader, just like we're
1922 * about to do, so if you know the value for your hardware, you
1923 * should put it in the platform data.
1925 fifo_size = mci_readl(host, FIFOTH);
1926 fifo_size = 1 + ((fifo_size >> 16) & 0x7ff);
1928 fifo_size = host->pdata->fifo_depth;
1930 host->fifo_depth = fifo_size;
1931 host->fifoth_val = ((0x2 << 28) | ((fifo_size/2 - 1) << 16) |
1932 ((fifo_size/2) << 0));
1933 mci_writel(host, FIFOTH, host->fifoth_val);
1935 /* disable clock to CIU */
1936 mci_writel(host, CLKENA, 0);
1937 mci_writel(host, CLKSRC, 0);
1939 tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host);
1940 dw_mci_card_workqueue = alloc_workqueue("dw-mci-card",
1941 WQ_MEM_RECLAIM | WQ_NON_REENTRANT, 1);
1942 if (!dw_mci_card_workqueue)
1944 INIT_WORK(&host->card_work, dw_mci_work_routine_card);
1946 ret = request_irq(irq, dw_mci_interrupt, 0, "dw-mci", host);
1950 platform_set_drvdata(pdev, host);
1952 if (host->pdata->num_slots)
1953 host->num_slots = host->pdata->num_slots;
1955 host->num_slots = ((mci_readl(host, HCON) >> 1) & 0x1F) + 1;
1957 /* We need at least one slot to succeed */
1958 for (i = 0; i < host->num_slots; i++) {
1959 ret = dw_mci_init_slot(host, i);
1967 * In 2.40a spec, Data offset is changed.
1968 * Need to check the version-id and set data-offset for DATA register.
1970 host->verid = SDMMC_GET_VERID(mci_readl(host, VERID));
1971 dev_info(&pdev->dev, "Version ID is %04x\n", host->verid);
1973 if (host->verid < DW_MMC_240A)
1974 host->data_offset = DATA_OFFSET;
1976 host->data_offset = DATA_240A_OFFSET;
1979 * Enable interrupts for command done, data over, data empty, card det,
1980 * receive ready and error such as transmit, receive timeout, crc error
1982 mci_writel(host, RINTSTS, 0xFFFFFFFF);
1983 mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER |
1984 SDMMC_INT_TXDR | SDMMC_INT_RXDR |
1985 DW_MCI_ERROR_FLAGS | SDMMC_INT_CD);
1986 mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE); /* Enable mci interrupt */
1988 dev_info(&pdev->dev, "DW MMC controller at irq %d, "
1989 "%d bit host data width, "
1991 irq, width, fifo_size);
1992 if (host->quirks & DW_MCI_QUIRK_IDMAC_DTO)
1993 dev_info(&pdev->dev, "Internal DMAC interrupt fix enabled.\n");
1998 /* De-init any initialized slots */
2001 dw_mci_cleanup_slot(host->slot[i], i);
2004 free_irq(irq, host);
2007 destroy_workqueue(dw_mci_card_workqueue);
2010 if (host->use_dma && host->dma_ops->exit)
2011 host->dma_ops->exit(host);
2012 dma_free_coherent(&host->pdev->dev, PAGE_SIZE,
2013 host->sg_cpu, host->sg_dma);
2014 iounmap(host->regs);
2017 regulator_disable(host->vmmc);
2018 regulator_put(host->vmmc);
2027 static int __exit dw_mci_remove(struct platform_device *pdev)
2029 struct dw_mci *host = platform_get_drvdata(pdev);
2032 mci_writel(host, RINTSTS, 0xFFFFFFFF);
2033 mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
2035 platform_set_drvdata(pdev, NULL);
2037 for (i = 0; i < host->num_slots; i++) {
2038 dev_dbg(&pdev->dev, "remove slot %d\n", i);
2040 dw_mci_cleanup_slot(host->slot[i], i);
2043 /* disable clock to CIU */
2044 mci_writel(host, CLKENA, 0);
2045 mci_writel(host, CLKSRC, 0);
2047 free_irq(platform_get_irq(pdev, 0), host);
2048 destroy_workqueue(dw_mci_card_workqueue);
2049 dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
2051 if (host->use_dma && host->dma_ops->exit)
2052 host->dma_ops->exit(host);
2055 regulator_disable(host->vmmc);
2056 regulator_put(host->vmmc);
2059 iounmap(host->regs);
2067 * TODO: we should probably disable the clock to the card in the suspend path.
2069 static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg)
2072 struct dw_mci *host = platform_get_drvdata(pdev);
2074 for (i = 0; i < host->num_slots; i++) {
2075 struct dw_mci_slot *slot = host->slot[i];
2078 ret = mmc_suspend_host(slot->mmc);
2081 slot = host->slot[i];
2083 mmc_resume_host(host->slot[i]->mmc);
2090 regulator_disable(host->vmmc);
2095 static int dw_mci_resume(struct platform_device *pdev)
2098 struct dw_mci *host = platform_get_drvdata(pdev);
2101 regulator_enable(host->vmmc);
2103 if (host->dma_ops->init)
2104 host->dma_ops->init(host);
2106 if (!mci_wait_reset(&pdev->dev, host)) {
2111 /* Restore the old value at FIFOTH register */
2112 mci_writel(host, FIFOTH, host->fifoth_val);
2114 mci_writel(host, RINTSTS, 0xFFFFFFFF);
2115 mci_writel(host, INTMASK, SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER |
2116 SDMMC_INT_TXDR | SDMMC_INT_RXDR |
2117 DW_MCI_ERROR_FLAGS | SDMMC_INT_CD);
2118 mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE);
2120 for (i = 0; i < host->num_slots; i++) {
2121 struct dw_mci_slot *slot = host->slot[i];
2124 ret = mmc_resume_host(host->slot[i]->mmc);
2132 #define dw_mci_suspend NULL
2133 #define dw_mci_resume NULL
2134 #endif /* CONFIG_PM */
2136 static struct platform_driver dw_mci_driver = {
2137 .remove = __exit_p(dw_mci_remove),
2138 .suspend = dw_mci_suspend,
2139 .resume = dw_mci_resume,
2145 static int __init dw_mci_init(void)
2147 return platform_driver_probe(&dw_mci_driver, dw_mci_probe);
2150 static void __exit dw_mci_exit(void)
2152 platform_driver_unregister(&dw_mci_driver);
2155 module_init(dw_mci_init);
2156 module_exit(dw_mci_exit);
2158 MODULE_DESCRIPTION("DW Multimedia Card Interface driver");
2159 MODULE_AUTHOR("NXP Semiconductor VietNam");
2160 MODULE_AUTHOR("Imagination Technologies Ltd");
2161 MODULE_LICENSE("GPL v2");