2 * tifm_sd.c - TI FlashMedia driver
4 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * Special thanks to Brad Campbell for extensive testing of this driver.
15 #include <linux/tifm.h>
16 #include <linux/mmc/protocol.h>
17 #include <linux/mmc/host.h>
18 #include <linux/highmem.h>
19 #include <linux/scatterlist.h>
22 #define DRIVER_NAME "tifm_sd"
23 #define DRIVER_VERSION "0.8"
25 static int no_dma = 0;
26 static int fixed_timeout = 0;
27 module_param(no_dma, bool, 0644);
28 module_param(fixed_timeout, bool, 0644);
30 /* Constants here are mostly from OMAP5912 datasheet */
31 #define TIFM_MMCSD_RESET 0x0002
32 #define TIFM_MMCSD_CLKMASK 0x03ff
33 #define TIFM_MMCSD_POWER 0x0800
34 #define TIFM_MMCSD_4BBUS 0x8000
35 #define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */
36 #define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */
37 #define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */
38 #define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */
39 #define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */
40 #define TIFM_MMCSD_READ 0x8000
42 #define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */
43 #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */
44 #define TIFM_MMCSD_CD 0x0002 /* card detect */
45 #define TIFM_MMCSD_CB 0x0004 /* card enter busy state */
46 #define TIFM_MMCSD_BRS 0x0008 /* block received/sent */
47 #define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */
48 #define TIFM_MMCSD_DTO 0x0020 /* data time-out */
49 #define TIFM_MMCSD_DCRC 0x0040 /* data crc error */
50 #define TIFM_MMCSD_CTO 0x0080 /* command time-out */
51 #define TIFM_MMCSD_CCRC 0x0100 /* command crc error */
52 #define TIFM_MMCSD_AF 0x0400 /* fifo almost full */
53 #define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */
54 #define TIFM_MMCSD_OCRB 0x1000 /* OCR busy */
55 #define TIFM_MMCSD_CIRQ 0x2000 /* card irq (cmd40/sdio) */
56 #define TIFM_MMCSD_CERR 0x4000 /* card status error */
58 #define TIFM_MMCSD_ODTO 0x0040 /* open drain / extended timeout */
59 #define TIFM_MMCSD_CARD_RO 0x0200 /* card is read-only */
61 #define TIFM_MMCSD_FIFO_SIZE 0x0020
63 #define TIFM_MMCSD_RSP_R0 0x0000
64 #define TIFM_MMCSD_RSP_R1 0x0100
65 #define TIFM_MMCSD_RSP_R2 0x0200
66 #define TIFM_MMCSD_RSP_R3 0x0300
67 #define TIFM_MMCSD_RSP_R4 0x0400
68 #define TIFM_MMCSD_RSP_R5 0x0500
69 #define TIFM_MMCSD_RSP_R6 0x0600
71 #define TIFM_MMCSD_RSP_BUSY 0x0800
73 #define TIFM_MMCSD_CMD_BC 0x0000
74 #define TIFM_MMCSD_CMD_BCR 0x1000
75 #define TIFM_MMCSD_CMD_AC 0x2000
76 #define TIFM_MMCSD_CMD_ADTC 0x3000
78 #define TIFM_MMCSD_MAX_BLOCK_SIZE 0x0800UL
93 unsigned short eject:1,
96 unsigned short cmd_flags;
98 unsigned int clk_freq;
100 unsigned long timeout_jiffies;
102 struct tasklet_struct finish_tasklet;
103 struct timer_list timer;
104 struct mmc_request *req;
108 unsigned int block_pos;
109 struct scatterlist bounce_buf;
110 unsigned char bounce_buf_data[TIFM_MMCSD_MAX_BLOCK_SIZE];
113 /* for some reason, host won't respond correctly to readw/writew */
114 static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg,
115 unsigned int off, unsigned int cnt)
117 struct tifm_dev *sock = host->dev;
119 unsigned int pos = 0, val;
121 buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + off;
122 if (host->cmd_flags & DATA_CARRY) {
123 buf[pos++] = host->bounce_buf_data[0];
124 host->cmd_flags &= ~DATA_CARRY;
128 val = readl(sock->addr + SOCK_MMCSD_DATA);
129 buf[pos++] = val & 0xff;
131 host->bounce_buf_data[0] = (val >> 8) & 0xff;
132 host->cmd_flags |= DATA_CARRY;
135 buf[pos++] = (val >> 8) & 0xff;
137 kunmap_atomic(buf - off, KM_BIO_DST_IRQ);
140 static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg,
141 unsigned int off, unsigned int cnt)
143 struct tifm_dev *sock = host->dev;
145 unsigned int pos = 0, val;
147 buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + off;
148 if (host->cmd_flags & DATA_CARRY) {
149 val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00);
150 writel(val, sock->addr + SOCK_MMCSD_DATA);
151 host->cmd_flags &= ~DATA_CARRY;
157 host->bounce_buf_data[0] = val & 0xff;
158 host->cmd_flags |= DATA_CARRY;
161 val |= (buf[pos++] << 8) & 0xff00;
162 writel(val, sock->addr + SOCK_MMCSD_DATA);
164 kunmap_atomic(buf - off, KM_BIO_SRC_IRQ);
167 static void tifm_sd_transfer_data(struct tifm_sd *host)
169 struct mmc_data *r_data = host->req->cmd->data;
170 struct scatterlist *sg = r_data->sg;
171 unsigned int off, cnt, t_size = TIFM_MMCSD_FIFO_SIZE * 2;
172 unsigned int p_off, p_cnt;
175 if (host->sg_pos == host->sg_len)
178 cnt = sg[host->sg_pos].length - host->block_pos;
182 if (host->sg_pos == host->sg_len) {
183 if ((r_data->flags & MMC_DATA_WRITE)
185 writel(host->bounce_buf_data[0],
191 cnt = sg[host->sg_pos].length;
193 off = sg[host->sg_pos].offset + host->block_pos;
195 pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT);
196 p_off = offset_in_page(off);
197 p_cnt = PAGE_SIZE - p_off;
198 p_cnt = min(p_cnt, cnt);
199 p_cnt = min(p_cnt, t_size);
201 if (r_data->flags & MMC_DATA_READ)
202 tifm_sd_read_fifo(host, pg, p_off, p_cnt);
203 else if (r_data->flags & MMC_DATA_WRITE)
204 tifm_sd_write_fifo(host, pg, p_off, p_cnt);
207 host->block_pos += p_cnt;
211 static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off,
212 struct page *src, unsigned int src_off,
215 unsigned char *src_buf = kmap_atomic(src, KM_BIO_SRC_IRQ) + src_off;
216 unsigned char *dst_buf = kmap_atomic(dst, KM_BIO_DST_IRQ) + dst_off;
218 memcpy(dst_buf, src_buf, count);
220 kunmap_atomic(dst_buf - dst_off, KM_BIO_DST_IRQ);
221 kunmap_atomic(src_buf - src_off, KM_BIO_SRC_IRQ);
224 static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data)
226 struct scatterlist *sg = r_data->sg;
227 unsigned int t_size = r_data->blksz;
228 unsigned int off, cnt;
229 unsigned int p_off, p_cnt;
232 dev_dbg(&host->dev->dev, "bouncing block\n");
234 cnt = sg[host->sg_pos].length - host->block_pos;
238 if (host->sg_pos == host->sg_len)
240 cnt = sg[host->sg_pos].length;
242 off = sg[host->sg_pos].offset + host->block_pos;
244 pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT);
245 p_off = offset_in_page(off);
246 p_cnt = PAGE_SIZE - p_off;
247 p_cnt = min(p_cnt, cnt);
248 p_cnt = min(p_cnt, t_size);
250 if (r_data->flags & MMC_DATA_WRITE)
251 tifm_sd_copy_page(host->bounce_buf.page,
252 r_data->blksz - t_size,
254 else if (r_data->flags & MMC_DATA_READ)
255 tifm_sd_copy_page(pg, p_off, host->bounce_buf.page,
256 r_data->blksz - t_size, p_cnt);
259 host->block_pos += p_cnt;
263 int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data)
265 struct tifm_dev *sock = host->dev;
266 unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz;
267 unsigned int dma_len, dma_blk_cnt, dma_off;
268 struct scatterlist *sg = NULL;
271 if (host->sg_pos == host->sg_len)
274 if (host->cmd_flags & DATA_CARRY) {
275 host->cmd_flags &= ~DATA_CARRY;
276 local_irq_save(flags);
277 tifm_sd_bounce_block(host, r_data);
278 local_irq_restore(flags);
279 if (host->sg_pos == host->sg_len)
283 dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos;
287 if (host->sg_pos == host->sg_len)
289 dma_len = sg_dma_len(&r_data->sg[host->sg_pos]);
292 if (dma_len < t_size) {
293 dma_blk_cnt = dma_len / r_data->blksz;
294 dma_off = host->block_pos;
295 host->block_pos += dma_blk_cnt * r_data->blksz;
297 dma_blk_cnt = TIFM_DMA_TSIZE;
298 dma_off = host->block_pos;
299 host->block_pos += t_size;
303 sg = &r_data->sg[host->sg_pos];
305 if (r_data->flags & MMC_DATA_WRITE) {
306 local_irq_save(flags);
307 tifm_sd_bounce_block(host, r_data);
308 local_irq_restore(flags);
310 host->cmd_flags |= DATA_CARRY;
312 sg = &host->bounce_buf;
318 dev_dbg(&sock->dev, "setting dma for %d blocks\n", dma_blk_cnt);
319 writel(sg_dma_address(sg) + dma_off, sock->addr + SOCK_DMA_ADDRESS);
320 if (r_data->flags & MMC_DATA_WRITE)
321 writel((dma_blk_cnt << 8) | TIFM_DMA_TX | TIFM_DMA_EN,
322 sock->addr + SOCK_DMA_CONTROL);
324 writel((dma_blk_cnt << 8) | TIFM_DMA_EN,
325 sock->addr + SOCK_DMA_CONTROL);
330 static unsigned int tifm_sd_op_flags(struct mmc_command *cmd)
334 switch (mmc_resp_type(cmd)) {
336 rc |= TIFM_MMCSD_RSP_R0;
339 rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through
341 rc |= TIFM_MMCSD_RSP_R1;
344 rc |= TIFM_MMCSD_RSP_R2;
347 rc |= TIFM_MMCSD_RSP_R3;
353 switch (mmc_cmd_type(cmd)) {
355 rc |= TIFM_MMCSD_CMD_BC;
358 rc |= TIFM_MMCSD_CMD_BCR;
361 rc |= TIFM_MMCSD_CMD_AC;
364 rc |= TIFM_MMCSD_CMD_ADTC;
372 static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd)
374 struct tifm_dev *sock = host->dev;
375 unsigned int cmd_mask = tifm_sd_op_flags(cmd);
377 if (host->open_drain)
378 cmd_mask |= TIFM_MMCSD_ODTO;
380 if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
381 cmd_mask |= TIFM_MMCSD_READ;
383 dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n",
384 cmd->opcode, cmd->arg, cmd_mask);
386 writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH);
387 writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW);
388 writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND);
391 static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock)
393 cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16)
394 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18);
395 cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16)
396 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10);
397 cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16)
398 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08);
399 cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16)
400 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00);
403 static void tifm_sd_check_status(struct tifm_sd *host)
405 struct tifm_dev *sock = host->dev;
406 struct mmc_command *cmd = host->req->cmd;
408 if (cmd->error != MMC_ERR_NONE)
411 if (!(host->cmd_flags & CMD_READY))
415 if (cmd->data->error != MMC_ERR_NONE) {
416 if ((host->cmd_flags & SCMD_ACTIVE)
417 && !(host->cmd_flags & SCMD_READY))
423 if (!(host->cmd_flags & BRS_READY))
426 if (!(host->no_dma || (host->cmd_flags & FIFO_READY)))
429 if (cmd->data->flags & MMC_DATA_WRITE) {
430 if (host->req->stop) {
431 if (!(host->cmd_flags & SCMD_ACTIVE)) {
432 host->cmd_flags |= SCMD_ACTIVE;
433 writel(TIFM_MMCSD_EOFB
435 + SOCK_MMCSD_INT_ENABLE),
437 + SOCK_MMCSD_INT_ENABLE);
438 tifm_sd_exec(host, host->req->stop);
441 if (!(host->cmd_flags & SCMD_READY)
442 || (host->cmd_flags & CARD_BUSY))
444 writel((~TIFM_MMCSD_EOFB)
446 + SOCK_MMCSD_INT_ENABLE),
448 + SOCK_MMCSD_INT_ENABLE);
451 if (host->cmd_flags & CARD_BUSY)
453 writel((~TIFM_MMCSD_EOFB)
455 + SOCK_MMCSD_INT_ENABLE),
456 sock->addr + SOCK_MMCSD_INT_ENABLE);
459 if (host->req->stop) {
460 if (!(host->cmd_flags & SCMD_ACTIVE)) {
461 host->cmd_flags |= SCMD_ACTIVE;
462 tifm_sd_exec(host, host->req->stop);
465 if (!(host->cmd_flags & SCMD_READY))
472 tasklet_schedule(&host->finish_tasklet);
475 /* Called from interrupt handler */
476 static void tifm_sd_data_event(struct tifm_dev *sock)
478 struct tifm_sd *host;
479 unsigned int fifo_status = 0;
480 struct mmc_data *r_data = NULL;
482 spin_lock(&sock->lock);
483 host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
484 fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
485 dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n",
486 fifo_status, host->cmd_flags);
489 r_data = host->req->cmd->data;
491 if (r_data && (fifo_status & TIFM_FIFO_READY)) {
492 if (tifm_sd_set_dma_data(host, r_data)) {
493 host->cmd_flags |= FIFO_READY;
494 tifm_sd_check_status(host);
499 writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
500 spin_unlock(&sock->lock);
503 /* Called from interrupt handler */
504 static void tifm_sd_card_event(struct tifm_dev *sock)
506 struct tifm_sd *host;
507 unsigned int host_status = 0;
508 int cmd_error = MMC_ERR_NONE;
509 struct mmc_command *cmd = NULL;
512 spin_lock(&sock->lock);
513 host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
514 host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
515 dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
516 host_status, host->cmd_flags);
519 cmd = host->req->cmd;
521 if (host_status & TIFM_MMCSD_ERRMASK) {
522 writel(host_status & TIFM_MMCSD_ERRMASK,
523 sock->addr + SOCK_MMCSD_STATUS);
524 if (host_status & TIFM_MMCSD_CTO)
525 cmd_error = MMC_ERR_TIMEOUT;
526 else if (host_status & TIFM_MMCSD_CCRC)
527 cmd_error = MMC_ERR_BADCRC;
530 if (host_status & TIFM_MMCSD_DTO)
531 cmd->data->error = MMC_ERR_TIMEOUT;
532 else if (host_status & TIFM_MMCSD_DCRC)
533 cmd->data->error = MMC_ERR_BADCRC;
536 writel(TIFM_FIFO_INT_SETALL,
537 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
538 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
540 if (host->req->stop) {
541 if (host->cmd_flags & SCMD_ACTIVE) {
542 host->req->stop->error = cmd_error;
543 host->cmd_flags |= SCMD_READY;
545 cmd->error = cmd_error;
546 host->cmd_flags |= SCMD_ACTIVE;
547 tifm_sd_exec(host, host->req->stop);
551 cmd->error = cmd_error;
553 if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) {
554 if (!(host->cmd_flags & CMD_READY)) {
555 host->cmd_flags |= CMD_READY;
556 tifm_sd_fetch_resp(cmd, sock);
557 } else if (host->cmd_flags & SCMD_ACTIVE) {
558 host->cmd_flags |= SCMD_READY;
559 tifm_sd_fetch_resp(host->req->stop,
563 if (host_status & TIFM_MMCSD_BRS)
564 host->cmd_flags |= BRS_READY;
567 if (host->no_dma && cmd->data) {
568 if (host_status & TIFM_MMCSD_AE)
569 writel(host_status & TIFM_MMCSD_AE,
570 sock->addr + SOCK_MMCSD_STATUS);
572 if (host_status & (TIFM_MMCSD_AE | TIFM_MMCSD_AF
574 local_irq_save(flags);
575 tifm_sd_transfer_data(host);
576 local_irq_restore(flags);
577 host_status &= ~TIFM_MMCSD_AE;
581 if (host_status & TIFM_MMCSD_EOFB)
582 host->cmd_flags &= ~CARD_BUSY;
583 else if (host_status & TIFM_MMCSD_CB)
584 host->cmd_flags |= CARD_BUSY;
586 tifm_sd_check_status(host);
589 writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
590 spin_unlock(&sock->lock);
593 static void tifm_sd_set_data_timeout(struct tifm_sd *host,
594 struct mmc_data *data)
596 struct tifm_dev *sock = host->dev;
597 unsigned int data_timeout = data->timeout_clks;
602 data_timeout += data->timeout_ns /
603 ((1000000000UL / host->clk_freq) * host->clk_div);
605 if (data_timeout < 0xffff) {
606 writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
607 writel((~TIFM_MMCSD_DPE)
608 & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
609 sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
611 data_timeout = (data_timeout >> 10) + 1;
612 if (data_timeout > 0xffff)
613 data_timeout = 0; /* set to unlimited */
614 writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
615 writel(TIFM_MMCSD_DPE
616 | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
617 sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
621 static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
623 struct tifm_sd *host = mmc_priv(mmc);
624 struct tifm_dev *sock = host->dev;
626 struct mmc_data *r_data = mrq->cmd->data;
628 spin_lock_irqsave(&sock->lock, flags);
630 spin_unlock_irqrestore(&sock->lock, flags);
635 printk(KERN_ERR "%s : unfinished request detected\n",
637 spin_unlock_irqrestore(&sock->lock, flags);
646 tifm_sd_set_data_timeout(host, r_data);
648 if ((r_data->flags & MMC_DATA_WRITE) && !mrq->stop)
649 writel(TIFM_MMCSD_EOFB
650 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
651 sock->addr + SOCK_MMCSD_INT_ENABLE);
654 writel(TIFM_MMCSD_BUFINT
655 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
656 sock->addr + SOCK_MMCSD_INT_ENABLE);
657 writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8)
658 | (TIFM_MMCSD_FIFO_SIZE - 1),
659 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
661 host->sg_len = r_data->sg_len;
663 sg_init_one(&host->bounce_buf, host->bounce_buf_data,
666 if(1 != tifm_map_sg(sock, &host->bounce_buf, 1,
667 r_data->flags & MMC_DATA_WRITE
669 : PCI_DMA_FROMDEVICE)) {
670 printk(KERN_ERR "%s : scatterlist map failed\n",
672 spin_unlock_irqrestore(&sock->lock, flags);
675 host->sg_len = tifm_map_sg(sock, r_data->sg,
680 : PCI_DMA_FROMDEVICE);
681 if (host->sg_len < 1) {
682 printk(KERN_ERR "%s : scatterlist map failed\n",
684 tifm_unmap_sg(sock, &host->bounce_buf, 1,
685 r_data->flags & MMC_DATA_WRITE
687 : PCI_DMA_FROMDEVICE);
688 spin_unlock_irqrestore(&sock->lock, flags);
692 writel(TIFM_FIFO_INT_SETALL,
693 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
694 writel(ilog2(r_data->blksz) - 2,
695 sock->addr + SOCK_FIFO_PAGE_SIZE);
696 writel(TIFM_FIFO_ENABLE,
697 sock->addr + SOCK_FIFO_CONTROL);
698 writel(TIFM_FIFO_INTMASK,
699 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
701 if (r_data->flags & MMC_DATA_WRITE)
702 writel(TIFM_MMCSD_TXDE,
703 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
705 writel(TIFM_MMCSD_RXDE,
706 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
708 tifm_sd_set_dma_data(host, r_data);
711 writel(r_data->blocks - 1,
712 sock->addr + SOCK_MMCSD_NUM_BLOCKS);
713 writel(r_data->blksz - 1,
714 sock->addr + SOCK_MMCSD_BLOCK_LEN);
718 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
719 writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
720 sock->addr + SOCK_CONTROL);
721 tifm_sd_exec(host, mrq->cmd);
722 spin_unlock_irqrestore(&sock->lock, flags);
726 mrq->cmd->error = MMC_ERR_TIMEOUT;
727 mmc_request_done(mmc, mrq);
730 static void tifm_sd_end_cmd(unsigned long data)
732 struct tifm_sd *host = (struct tifm_sd*)data;
733 struct tifm_dev *sock = host->dev;
734 struct mmc_host *mmc = tifm_get_drvdata(sock);
735 struct mmc_request *mrq;
736 struct mmc_data *r_data = NULL;
739 spin_lock_irqsave(&sock->lock, flags);
741 del_timer(&host->timer);
746 printk(KERN_ERR " %s : no request to complete?\n",
748 spin_unlock_irqrestore(&sock->lock, flags);
752 r_data = mrq->cmd->data;
755 writel((~TIFM_MMCSD_BUFINT)
756 & readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
757 sock->addr + SOCK_MMCSD_INT_ENABLE);
759 tifm_unmap_sg(sock, &host->bounce_buf, 1,
760 (r_data->flags & MMC_DATA_WRITE)
761 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
762 tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
763 (r_data->flags & MMC_DATA_WRITE)
764 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
767 r_data->bytes_xfered = r_data->blocks
768 - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
769 r_data->bytes_xfered *= r_data->blksz;
770 r_data->bytes_xfered += r_data->blksz
771 - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
774 writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
775 sock->addr + SOCK_CONTROL);
777 spin_unlock_irqrestore(&sock->lock, flags);
778 mmc_request_done(mmc, mrq);
781 static void tifm_sd_abort(unsigned long data)
783 struct tifm_sd *host = (struct tifm_sd*)data;
786 "%s : card failed to respond for a long period of time "
788 host->dev->dev.bus_id, host->req->cmd->opcode, host->cmd_flags);
790 tifm_eject(host->dev);
793 static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios)
795 struct tifm_sd *host = mmc_priv(mmc);
796 struct tifm_dev *sock = host->dev;
797 unsigned int clk_div1, clk_div2;
800 spin_lock_irqsave(&sock->lock, flags);
802 dev_dbg(&sock->dev, "ios: clock = %u, vdd = %x, bus_mode = %x, "
803 "chip_select = %x, power_mode = %x, bus_width = %x\n",
804 ios->clock, ios->vdd, ios->bus_mode, ios->chip_select,
805 ios->power_mode, ios->bus_width);
807 if (ios->bus_width == MMC_BUS_WIDTH_4) {
808 writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG),
809 sock->addr + SOCK_MMCSD_CONFIG);
811 writel((~TIFM_MMCSD_4BBUS)
812 & readl(sock->addr + SOCK_MMCSD_CONFIG),
813 sock->addr + SOCK_MMCSD_CONFIG);
817 clk_div1 = 20000000 / ios->clock;
821 clk_div2 = 24000000 / ios->clock;
825 if ((20000000 / clk_div1) > ios->clock)
827 if ((24000000 / clk_div2) > ios->clock)
829 if ((20000000 / clk_div1) > (24000000 / clk_div2)) {
830 host->clk_freq = 20000000;
831 host->clk_div = clk_div1;
832 writel((~TIFM_CTRL_FAST_CLK)
833 & readl(sock->addr + SOCK_CONTROL),
834 sock->addr + SOCK_CONTROL);
836 host->clk_freq = 24000000;
837 host->clk_div = clk_div2;
838 writel(TIFM_CTRL_FAST_CLK
839 | readl(sock->addr + SOCK_CONTROL),
840 sock->addr + SOCK_CONTROL);
845 host->clk_div &= TIFM_MMCSD_CLKMASK;
847 | ((~TIFM_MMCSD_CLKMASK)
848 & readl(sock->addr + SOCK_MMCSD_CONFIG)),
849 sock->addr + SOCK_MMCSD_CONFIG);
851 host->open_drain = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN);
853 /* chip_select : maybe later */
855 //power is set before probe / after remove
857 spin_unlock_irqrestore(&sock->lock, flags);
860 static int tifm_sd_ro(struct mmc_host *mmc)
863 struct tifm_sd *host = mmc_priv(mmc);
864 struct tifm_dev *sock = host->dev;
867 spin_lock_irqsave(&sock->lock, flags);
868 if (TIFM_MMCSD_CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE))
870 spin_unlock_irqrestore(&sock->lock, flags);
874 static const struct mmc_host_ops tifm_sd_ops = {
875 .request = tifm_sd_request,
876 .set_ios = tifm_sd_ios,
880 static int tifm_sd_initialize_host(struct tifm_sd *host)
883 unsigned int host_status = 0;
884 struct tifm_dev *sock = host->dev;
886 writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
889 host->clk_freq = 20000000;
890 writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL);
891 writel(host->clk_div | TIFM_MMCSD_POWER,
892 sock->addr + SOCK_MMCSD_CONFIG);
894 /* wait up to 0.51 sec for reset */
895 for (rc = 32; rc <= 256; rc <<= 1) {
896 if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) {
904 printk(KERN_ERR "%s : controller failed to reset\n",
909 writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
910 writel(host->clk_div | TIFM_MMCSD_POWER,
911 sock->addr + SOCK_MMCSD_CONFIG);
912 writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
914 // command timeout fixed to 64 clocks for now
915 writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO);
916 writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND);
918 for (rc = 16; rc <= 64; rc <<= 1) {
919 host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
920 writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
921 if (!(host_status & TIFM_MMCSD_ERRMASK)
922 && (host_status & TIFM_MMCSD_EOC)) {
931 "%s : card not ready - probe failed on initialization\n",
936 writel(TIFM_MMCSD_CERR | TIFM_MMCSD_BRS | TIFM_MMCSD_EOC
937 | TIFM_MMCSD_ERRMASK,
938 sock->addr + SOCK_MMCSD_INT_ENABLE);
944 static int tifm_sd_probe(struct tifm_dev *sock)
946 struct mmc_host *mmc;
947 struct tifm_sd *host;
950 if (!(TIFM_SOCK_STATE_OCCUPIED
951 & readl(sock->addr + SOCK_PRESENT_STATE))) {
952 printk(KERN_WARNING "%s : card gone, unexpectedly\n",
957 mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev);
961 host = mmc_priv(mmc);
962 host->no_dma = no_dma;
963 tifm_set_drvdata(sock, mmc);
965 host->timeout_jiffies = msecs_to_jiffies(1000);
967 tasklet_init(&host->finish_tasklet, tifm_sd_end_cmd,
968 (unsigned long)host);
969 setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host);
971 mmc->ops = &tifm_sd_ops;
972 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
973 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
974 mmc->f_min = 20000000 / 60;
975 mmc->f_max = 24000000;
977 mmc->max_blk_count = 2048;
978 mmc->max_hw_segs = mmc->max_blk_count;
979 mmc->max_blk_size = min(TIFM_MMCSD_MAX_BLOCK_SIZE, PAGE_SIZE);
980 mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
981 mmc->max_req_size = mmc->max_seg_size;
982 mmc->max_phys_segs = mmc->max_hw_segs;
984 sock->card_event = tifm_sd_card_event;
985 sock->data_event = tifm_sd_data_event;
986 rc = tifm_sd_initialize_host(host);
989 rc = mmc_add_host(mmc);
997 static void tifm_sd_remove(struct tifm_dev *sock)
999 struct mmc_host *mmc = tifm_get_drvdata(sock);
1000 struct tifm_sd *host = mmc_priv(mmc);
1001 unsigned long flags;
1003 spin_lock_irqsave(&sock->lock, flags);
1005 writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
1007 spin_unlock_irqrestore(&sock->lock, flags);
1009 tasklet_kill(&host->finish_tasklet);
1011 spin_lock_irqsave(&sock->lock, flags);
1013 writel(TIFM_FIFO_INT_SETALL,
1014 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
1015 writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
1016 host->req->cmd->error = MMC_ERR_TIMEOUT;
1017 if (host->req->stop)
1018 host->req->stop->error = MMC_ERR_TIMEOUT;
1019 tasklet_schedule(&host->finish_tasklet);
1021 spin_unlock_irqrestore(&sock->lock, flags);
1022 mmc_remove_host(mmc);
1023 dev_dbg(&sock->dev, "after remove\n");
1025 /* The meaning of the bit majority in this constant is unknown. */
1026 writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
1027 sock->addr + SOCK_CONTROL);
1034 static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state)
1036 struct mmc_host *mmc = tifm_get_drvdata(sock);
1039 rc = mmc_suspend_host(mmc, state);
1040 /* The meaning of the bit majority in this constant is unknown. */
1041 writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
1042 sock->addr + SOCK_CONTROL);
1046 static int tifm_sd_resume(struct tifm_dev *sock)
1048 struct mmc_host *mmc = tifm_get_drvdata(sock);
1049 struct tifm_sd *host = mmc_priv(mmc);
1052 rc = tifm_sd_initialize_host(host);
1053 dev_dbg(&sock->dev, "resume initialize %d\n", rc);
1058 rc = mmc_resume_host(mmc);
1065 #define tifm_sd_suspend NULL
1066 #define tifm_sd_resume NULL
1068 #endif /* CONFIG_PM */
1070 static struct tifm_device_id tifm_sd_id_tbl[] = {
1071 { TIFM_TYPE_SD }, { }
1074 static struct tifm_driver tifm_sd_driver = {
1076 .name = DRIVER_NAME,
1077 .owner = THIS_MODULE
1079 .id_table = tifm_sd_id_tbl,
1080 .probe = tifm_sd_probe,
1081 .remove = tifm_sd_remove,
1082 .suspend = tifm_sd_suspend,
1083 .resume = tifm_sd_resume
1086 static int __init tifm_sd_init(void)
1088 return tifm_register_driver(&tifm_sd_driver);
1091 static void __exit tifm_sd_exit(void)
1093 tifm_unregister_driver(&tifm_sd_driver);
1096 MODULE_AUTHOR("Alex Dubov");
1097 MODULE_DESCRIPTION("TI FlashMedia SD driver");
1098 MODULE_LICENSE("GPL");
1099 MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl);
1100 MODULE_VERSION(DRIVER_VERSION);
1102 module_init(tifm_sd_init);
1103 module_exit(tifm_sd_exit);