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/host.h>
17 #include <linux/highmem.h>
18 #include <linux/scatterlist.h>
21 #define DRIVER_NAME "tifm_sd"
22 #define DRIVER_VERSION "0.8"
24 static int no_dma = 0;
25 static int fixed_timeout = 0;
26 module_param(no_dma, bool, 0644);
27 module_param(fixed_timeout, bool, 0644);
29 /* Constants here are mostly from OMAP5912 datasheet */
30 #define TIFM_MMCSD_RESET 0x0002
31 #define TIFM_MMCSD_CLKMASK 0x03ff
32 #define TIFM_MMCSD_POWER 0x0800
33 #define TIFM_MMCSD_4BBUS 0x8000
34 #define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */
35 #define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */
36 #define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */
37 #define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */
38 #define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */
39 #define TIFM_MMCSD_READ 0x8000
41 #define TIFM_MMCSD_ERRMASK 0x01e0 /* set bits: CCRC, CTO, DCRC, DTO */
42 #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */
43 #define TIFM_MMCSD_CD 0x0002 /* card detect */
44 #define TIFM_MMCSD_CB 0x0004 /* card enter busy state */
45 #define TIFM_MMCSD_BRS 0x0008 /* block received/sent */
46 #define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */
47 #define TIFM_MMCSD_DTO 0x0020 /* data time-out */
48 #define TIFM_MMCSD_DCRC 0x0040 /* data crc error */
49 #define TIFM_MMCSD_CTO 0x0080 /* command time-out */
50 #define TIFM_MMCSD_CCRC 0x0100 /* command crc error */
51 #define TIFM_MMCSD_AF 0x0400 /* fifo almost full */
52 #define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */
53 #define TIFM_MMCSD_OCRB 0x1000 /* OCR busy */
54 #define TIFM_MMCSD_CIRQ 0x2000 /* card irq (cmd40/sdio) */
55 #define TIFM_MMCSD_CERR 0x4000 /* card status error */
57 #define TIFM_MMCSD_ODTO 0x0040 /* open drain / extended timeout */
58 #define TIFM_MMCSD_CARD_RO 0x0200 /* card is read-only */
60 #define TIFM_MMCSD_FIFO_SIZE 0x0020
62 #define TIFM_MMCSD_RSP_R0 0x0000
63 #define TIFM_MMCSD_RSP_R1 0x0100
64 #define TIFM_MMCSD_RSP_R2 0x0200
65 #define TIFM_MMCSD_RSP_R3 0x0300
66 #define TIFM_MMCSD_RSP_R4 0x0400
67 #define TIFM_MMCSD_RSP_R5 0x0500
68 #define TIFM_MMCSD_RSP_R6 0x0600
70 #define TIFM_MMCSD_RSP_BUSY 0x0800
72 #define TIFM_MMCSD_CMD_BC 0x0000
73 #define TIFM_MMCSD_CMD_BCR 0x1000
74 #define TIFM_MMCSD_CMD_AC 0x2000
75 #define TIFM_MMCSD_CMD_ADTC 0x3000
77 #define TIFM_MMCSD_MAX_BLOCK_SIZE 0x0800UL
92 unsigned short eject:1,
95 unsigned short cmd_flags;
97 unsigned int clk_freq;
99 unsigned long timeout_jiffies;
101 struct tasklet_struct finish_tasklet;
102 struct timer_list timer;
103 struct mmc_request *req;
107 unsigned int block_pos;
108 struct scatterlist bounce_buf;
109 unsigned char bounce_buf_data[TIFM_MMCSD_MAX_BLOCK_SIZE];
112 /* for some reason, host won't respond correctly to readw/writew */
113 static void tifm_sd_read_fifo(struct tifm_sd *host, struct page *pg,
114 unsigned int off, unsigned int cnt)
116 struct tifm_dev *sock = host->dev;
118 unsigned int pos = 0, val;
120 buf = kmap_atomic(pg, KM_BIO_DST_IRQ) + off;
121 if (host->cmd_flags & DATA_CARRY) {
122 buf[pos++] = host->bounce_buf_data[0];
123 host->cmd_flags &= ~DATA_CARRY;
127 val = readl(sock->addr + SOCK_MMCSD_DATA);
128 buf[pos++] = val & 0xff;
130 host->bounce_buf_data[0] = (val >> 8) & 0xff;
131 host->cmd_flags |= DATA_CARRY;
134 buf[pos++] = (val >> 8) & 0xff;
136 kunmap_atomic(buf - off, KM_BIO_DST_IRQ);
139 static void tifm_sd_write_fifo(struct tifm_sd *host, struct page *pg,
140 unsigned int off, unsigned int cnt)
142 struct tifm_dev *sock = host->dev;
144 unsigned int pos = 0, val;
146 buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + off;
147 if (host->cmd_flags & DATA_CARRY) {
148 val = host->bounce_buf_data[0] | ((buf[pos++] << 8) & 0xff00);
149 writel(val, sock->addr + SOCK_MMCSD_DATA);
150 host->cmd_flags &= ~DATA_CARRY;
156 host->bounce_buf_data[0] = val & 0xff;
157 host->cmd_flags |= DATA_CARRY;
160 val |= (buf[pos++] << 8) & 0xff00;
161 writel(val, sock->addr + SOCK_MMCSD_DATA);
163 kunmap_atomic(buf - off, KM_BIO_SRC_IRQ);
166 static void tifm_sd_transfer_data(struct tifm_sd *host)
168 struct mmc_data *r_data = host->req->cmd->data;
169 struct scatterlist *sg = r_data->sg;
170 unsigned int off, cnt, t_size = TIFM_MMCSD_FIFO_SIZE * 2;
171 unsigned int p_off, p_cnt;
174 if (host->sg_pos == host->sg_len)
177 cnt = sg[host->sg_pos].length - host->block_pos;
181 if (host->sg_pos == host->sg_len) {
182 if ((r_data->flags & MMC_DATA_WRITE)
184 writel(host->bounce_buf_data[0],
190 cnt = sg[host->sg_pos].length;
192 off = sg[host->sg_pos].offset + host->block_pos;
194 pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT);
195 p_off = offset_in_page(off);
196 p_cnt = PAGE_SIZE - p_off;
197 p_cnt = min(p_cnt, cnt);
198 p_cnt = min(p_cnt, t_size);
200 if (r_data->flags & MMC_DATA_READ)
201 tifm_sd_read_fifo(host, pg, p_off, p_cnt);
202 else if (r_data->flags & MMC_DATA_WRITE)
203 tifm_sd_write_fifo(host, pg, p_off, p_cnt);
206 host->block_pos += p_cnt;
210 static void tifm_sd_copy_page(struct page *dst, unsigned int dst_off,
211 struct page *src, unsigned int src_off,
214 unsigned char *src_buf = kmap_atomic(src, KM_BIO_SRC_IRQ) + src_off;
215 unsigned char *dst_buf = kmap_atomic(dst, KM_BIO_DST_IRQ) + dst_off;
217 memcpy(dst_buf, src_buf, count);
219 kunmap_atomic(dst_buf - dst_off, KM_BIO_DST_IRQ);
220 kunmap_atomic(src_buf - src_off, KM_BIO_SRC_IRQ);
223 static void tifm_sd_bounce_block(struct tifm_sd *host, struct mmc_data *r_data)
225 struct scatterlist *sg = r_data->sg;
226 unsigned int t_size = r_data->blksz;
227 unsigned int off, cnt;
228 unsigned int p_off, p_cnt;
231 dev_dbg(&host->dev->dev, "bouncing block\n");
233 cnt = sg[host->sg_pos].length - host->block_pos;
237 if (host->sg_pos == host->sg_len)
239 cnt = sg[host->sg_pos].length;
241 off = sg[host->sg_pos].offset + host->block_pos;
243 pg = nth_page(sg[host->sg_pos].page, off >> PAGE_SHIFT);
244 p_off = offset_in_page(off);
245 p_cnt = PAGE_SIZE - p_off;
246 p_cnt = min(p_cnt, cnt);
247 p_cnt = min(p_cnt, t_size);
249 if (r_data->flags & MMC_DATA_WRITE)
250 tifm_sd_copy_page(host->bounce_buf.page,
251 r_data->blksz - t_size,
253 else if (r_data->flags & MMC_DATA_READ)
254 tifm_sd_copy_page(pg, p_off, host->bounce_buf.page,
255 r_data->blksz - t_size, p_cnt);
258 host->block_pos += p_cnt;
262 static int tifm_sd_set_dma_data(struct tifm_sd *host, struct mmc_data *r_data)
264 struct tifm_dev *sock = host->dev;
265 unsigned int t_size = TIFM_DMA_TSIZE * r_data->blksz;
266 unsigned int dma_len, dma_blk_cnt, dma_off;
267 struct scatterlist *sg = NULL;
270 if (host->sg_pos == host->sg_len)
273 if (host->cmd_flags & DATA_CARRY) {
274 host->cmd_flags &= ~DATA_CARRY;
275 local_irq_save(flags);
276 tifm_sd_bounce_block(host, r_data);
277 local_irq_restore(flags);
278 if (host->sg_pos == host->sg_len)
282 dma_len = sg_dma_len(&r_data->sg[host->sg_pos]) - host->block_pos;
286 if (host->sg_pos == host->sg_len)
288 dma_len = sg_dma_len(&r_data->sg[host->sg_pos]);
291 if (dma_len < t_size) {
292 dma_blk_cnt = dma_len / r_data->blksz;
293 dma_off = host->block_pos;
294 host->block_pos += dma_blk_cnt * r_data->blksz;
296 dma_blk_cnt = TIFM_DMA_TSIZE;
297 dma_off = host->block_pos;
298 host->block_pos += t_size;
302 sg = &r_data->sg[host->sg_pos];
304 if (r_data->flags & MMC_DATA_WRITE) {
305 local_irq_save(flags);
306 tifm_sd_bounce_block(host, r_data);
307 local_irq_restore(flags);
309 host->cmd_flags |= DATA_CARRY;
311 sg = &host->bounce_buf;
317 dev_dbg(&sock->dev, "setting dma for %d blocks\n", dma_blk_cnt);
318 writel(sg_dma_address(sg) + dma_off, sock->addr + SOCK_DMA_ADDRESS);
319 if (r_data->flags & MMC_DATA_WRITE)
320 writel((dma_blk_cnt << 8) | TIFM_DMA_TX | TIFM_DMA_EN,
321 sock->addr + SOCK_DMA_CONTROL);
323 writel((dma_blk_cnt << 8) | TIFM_DMA_EN,
324 sock->addr + SOCK_DMA_CONTROL);
329 static unsigned int tifm_sd_op_flags(struct mmc_command *cmd)
333 switch (mmc_resp_type(cmd)) {
335 rc |= TIFM_MMCSD_RSP_R0;
338 rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through
340 rc |= TIFM_MMCSD_RSP_R1;
343 rc |= TIFM_MMCSD_RSP_R2;
346 rc |= TIFM_MMCSD_RSP_R3;
352 switch (mmc_cmd_type(cmd)) {
354 rc |= TIFM_MMCSD_CMD_BC;
357 rc |= TIFM_MMCSD_CMD_BCR;
360 rc |= TIFM_MMCSD_CMD_AC;
363 rc |= TIFM_MMCSD_CMD_ADTC;
371 static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd)
373 struct tifm_dev *sock = host->dev;
374 unsigned int cmd_mask = tifm_sd_op_flags(cmd);
376 if (host->open_drain)
377 cmd_mask |= TIFM_MMCSD_ODTO;
379 if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
380 cmd_mask |= TIFM_MMCSD_READ;
382 dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n",
383 cmd->opcode, cmd->arg, cmd_mask);
385 writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH);
386 writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW);
387 writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND);
390 static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock)
392 cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16)
393 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18);
394 cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16)
395 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10);
396 cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16)
397 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08);
398 cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16)
399 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00);
402 static void tifm_sd_check_status(struct tifm_sd *host)
404 struct tifm_dev *sock = host->dev;
405 struct mmc_command *cmd = host->req->cmd;
410 if (!(host->cmd_flags & CMD_READY))
414 if (cmd->data->error) {
415 if ((host->cmd_flags & SCMD_ACTIVE)
416 && !(host->cmd_flags & SCMD_READY))
422 if (!(host->cmd_flags & BRS_READY))
425 if (!(host->no_dma || (host->cmd_flags & FIFO_READY)))
428 if (cmd->data->flags & MMC_DATA_WRITE) {
429 if (host->req->stop) {
430 if (!(host->cmd_flags & SCMD_ACTIVE)) {
431 host->cmd_flags |= SCMD_ACTIVE;
432 writel(TIFM_MMCSD_EOFB
434 + SOCK_MMCSD_INT_ENABLE),
436 + SOCK_MMCSD_INT_ENABLE);
437 tifm_sd_exec(host, host->req->stop);
440 if (!(host->cmd_flags & SCMD_READY)
441 || (host->cmd_flags & CARD_BUSY))
443 writel((~TIFM_MMCSD_EOFB)
445 + SOCK_MMCSD_INT_ENABLE),
447 + SOCK_MMCSD_INT_ENABLE);
450 if (host->cmd_flags & CARD_BUSY)
452 writel((~TIFM_MMCSD_EOFB)
454 + SOCK_MMCSD_INT_ENABLE),
455 sock->addr + SOCK_MMCSD_INT_ENABLE);
458 if (host->req->stop) {
459 if (!(host->cmd_flags & SCMD_ACTIVE)) {
460 host->cmd_flags |= SCMD_ACTIVE;
461 tifm_sd_exec(host, host->req->stop);
464 if (!(host->cmd_flags & SCMD_READY))
471 tasklet_schedule(&host->finish_tasklet);
474 /* Called from interrupt handler */
475 static void tifm_sd_data_event(struct tifm_dev *sock)
477 struct tifm_sd *host;
478 unsigned int fifo_status = 0;
479 struct mmc_data *r_data = NULL;
481 spin_lock(&sock->lock);
482 host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
483 fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
484 dev_dbg(&sock->dev, "data event: fifo_status %x, flags %x\n",
485 fifo_status, host->cmd_flags);
488 r_data = host->req->cmd->data;
490 if (r_data && (fifo_status & TIFM_FIFO_READY)) {
491 if (tifm_sd_set_dma_data(host, r_data)) {
492 host->cmd_flags |= FIFO_READY;
493 tifm_sd_check_status(host);
498 writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
499 spin_unlock(&sock->lock);
502 /* Called from interrupt handler */
503 static void tifm_sd_card_event(struct tifm_dev *sock)
505 struct tifm_sd *host;
506 unsigned int host_status = 0;
508 struct mmc_command *cmd = NULL;
511 spin_lock(&sock->lock);
512 host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
513 host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
514 dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
515 host_status, host->cmd_flags);
518 cmd = host->req->cmd;
520 if (host_status & TIFM_MMCSD_ERRMASK) {
521 writel(host_status & TIFM_MMCSD_ERRMASK,
522 sock->addr + SOCK_MMCSD_STATUS);
523 if (host_status & TIFM_MMCSD_CTO)
524 cmd_error = -ETIMEDOUT;
525 else if (host_status & TIFM_MMCSD_CCRC)
529 if (host_status & TIFM_MMCSD_DTO)
530 cmd->data->error = -ETIMEDOUT;
531 else if (host_status & TIFM_MMCSD_DCRC)
532 cmd->data->error = -EILSEQ;
535 writel(TIFM_FIFO_INT_SETALL,
536 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
537 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
539 if (host->req->stop) {
540 if (host->cmd_flags & SCMD_ACTIVE) {
541 host->req->stop->error = cmd_error;
542 host->cmd_flags |= SCMD_READY;
544 cmd->error = cmd_error;
545 host->cmd_flags |= SCMD_ACTIVE;
546 tifm_sd_exec(host, host->req->stop);
550 cmd->error = cmd_error;
552 if (host_status & (TIFM_MMCSD_EOC | TIFM_MMCSD_CERR)) {
553 if (!(host->cmd_flags & CMD_READY)) {
554 host->cmd_flags |= CMD_READY;
555 tifm_sd_fetch_resp(cmd, sock);
556 } else if (host->cmd_flags & SCMD_ACTIVE) {
557 host->cmd_flags |= SCMD_READY;
558 tifm_sd_fetch_resp(host->req->stop,
562 if (host_status & TIFM_MMCSD_BRS)
563 host->cmd_flags |= BRS_READY;
566 if (host->no_dma && cmd->data) {
567 if (host_status & TIFM_MMCSD_AE)
568 writel(host_status & TIFM_MMCSD_AE,
569 sock->addr + SOCK_MMCSD_STATUS);
571 if (host_status & (TIFM_MMCSD_AE | TIFM_MMCSD_AF
573 local_irq_save(flags);
574 tifm_sd_transfer_data(host);
575 local_irq_restore(flags);
576 host_status &= ~TIFM_MMCSD_AE;
580 if (host_status & TIFM_MMCSD_EOFB)
581 host->cmd_flags &= ~CARD_BUSY;
582 else if (host_status & TIFM_MMCSD_CB)
583 host->cmd_flags |= CARD_BUSY;
585 tifm_sd_check_status(host);
588 writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
589 spin_unlock(&sock->lock);
592 static void tifm_sd_set_data_timeout(struct tifm_sd *host,
593 struct mmc_data *data)
595 struct tifm_dev *sock = host->dev;
596 unsigned int data_timeout = data->timeout_clks;
601 data_timeout += data->timeout_ns /
602 ((1000000000UL / host->clk_freq) * host->clk_div);
604 if (data_timeout < 0xffff) {
605 writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
606 writel((~TIFM_MMCSD_DPE)
607 & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
608 sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
610 data_timeout = (data_timeout >> 10) + 1;
611 if (data_timeout > 0xffff)
612 data_timeout = 0; /* set to unlimited */
613 writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
614 writel(TIFM_MMCSD_DPE
615 | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
616 sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
620 static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
622 struct tifm_sd *host = mmc_priv(mmc);
623 struct tifm_dev *sock = host->dev;
625 struct mmc_data *r_data = mrq->cmd->data;
627 spin_lock_irqsave(&sock->lock, flags);
629 mrq->cmd->error = -ENOMEDIUM;
634 printk(KERN_ERR "%s : unfinished request detected\n",
636 mrq->cmd->error = -ETIMEDOUT;
640 if (mrq->data && (hweight32(mrq->data->blksz) > 1)) {
641 printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n",
642 sock->dev.bus_id, mrq->data->blksz);
643 mrq->cmd->error = -EINVAL;
652 tifm_sd_set_data_timeout(host, r_data);
654 if ((r_data->flags & MMC_DATA_WRITE) && !mrq->stop)
655 writel(TIFM_MMCSD_EOFB
656 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
657 sock->addr + SOCK_MMCSD_INT_ENABLE);
660 writel(TIFM_MMCSD_BUFINT
661 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
662 sock->addr + SOCK_MMCSD_INT_ENABLE);
663 writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8)
664 | (TIFM_MMCSD_FIFO_SIZE - 1),
665 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
667 host->sg_len = r_data->sg_len;
669 sg_init_one(&host->bounce_buf, host->bounce_buf_data,
672 if(1 != tifm_map_sg(sock, &host->bounce_buf, 1,
673 r_data->flags & MMC_DATA_WRITE
675 : PCI_DMA_FROMDEVICE)) {
676 printk(KERN_ERR "%s : scatterlist map failed\n",
678 spin_unlock_irqrestore(&sock->lock, flags);
681 host->sg_len = tifm_map_sg(sock, r_data->sg,
686 : PCI_DMA_FROMDEVICE);
687 if (host->sg_len < 1) {
688 printk(KERN_ERR "%s : scatterlist map failed\n",
690 tifm_unmap_sg(sock, &host->bounce_buf, 1,
691 r_data->flags & MMC_DATA_WRITE
693 : PCI_DMA_FROMDEVICE);
694 spin_unlock_irqrestore(&sock->lock, flags);
698 writel(TIFM_FIFO_INT_SETALL,
699 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
700 writel(ilog2(r_data->blksz) - 2,
701 sock->addr + SOCK_FIFO_PAGE_SIZE);
702 writel(TIFM_FIFO_ENABLE,
703 sock->addr + SOCK_FIFO_CONTROL);
704 writel(TIFM_FIFO_INTMASK,
705 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
707 if (r_data->flags & MMC_DATA_WRITE)
708 writel(TIFM_MMCSD_TXDE,
709 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
711 writel(TIFM_MMCSD_RXDE,
712 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
714 tifm_sd_set_dma_data(host, r_data);
717 writel(r_data->blocks - 1,
718 sock->addr + SOCK_MMCSD_NUM_BLOCKS);
719 writel(r_data->blksz - 1,
720 sock->addr + SOCK_MMCSD_BLOCK_LEN);
724 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
725 writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
726 sock->addr + SOCK_CONTROL);
727 tifm_sd_exec(host, mrq->cmd);
728 spin_unlock_irqrestore(&sock->lock, flags);
732 spin_unlock_irqrestore(&sock->lock, flags);
733 mmc_request_done(mmc, mrq);
736 static void tifm_sd_end_cmd(unsigned long data)
738 struct tifm_sd *host = (struct tifm_sd*)data;
739 struct tifm_dev *sock = host->dev;
740 struct mmc_host *mmc = tifm_get_drvdata(sock);
741 struct mmc_request *mrq;
742 struct mmc_data *r_data = NULL;
745 spin_lock_irqsave(&sock->lock, flags);
747 del_timer(&host->timer);
752 printk(KERN_ERR " %s : no request to complete?\n",
754 spin_unlock_irqrestore(&sock->lock, flags);
758 r_data = mrq->cmd->data;
761 writel((~TIFM_MMCSD_BUFINT)
762 & readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
763 sock->addr + SOCK_MMCSD_INT_ENABLE);
765 tifm_unmap_sg(sock, &host->bounce_buf, 1,
766 (r_data->flags & MMC_DATA_WRITE)
767 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
768 tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
769 (r_data->flags & MMC_DATA_WRITE)
770 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
773 r_data->bytes_xfered = r_data->blocks
774 - readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
775 r_data->bytes_xfered *= r_data->blksz;
776 r_data->bytes_xfered += r_data->blksz
777 - readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
780 writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
781 sock->addr + SOCK_CONTROL);
783 spin_unlock_irqrestore(&sock->lock, flags);
784 mmc_request_done(mmc, mrq);
787 static void tifm_sd_abort(unsigned long data)
789 struct tifm_sd *host = (struct tifm_sd*)data;
792 "%s : card failed to respond for a long period of time "
794 host->dev->dev.bus_id, host->req->cmd->opcode, host->cmd_flags);
796 tifm_eject(host->dev);
799 static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios)
801 struct tifm_sd *host = mmc_priv(mmc);
802 struct tifm_dev *sock = host->dev;
803 unsigned int clk_div1, clk_div2;
806 spin_lock_irqsave(&sock->lock, flags);
808 dev_dbg(&sock->dev, "ios: clock = %u, vdd = %x, bus_mode = %x, "
809 "chip_select = %x, power_mode = %x, bus_width = %x\n",
810 ios->clock, ios->vdd, ios->bus_mode, ios->chip_select,
811 ios->power_mode, ios->bus_width);
813 if (ios->bus_width == MMC_BUS_WIDTH_4) {
814 writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG),
815 sock->addr + SOCK_MMCSD_CONFIG);
817 writel((~TIFM_MMCSD_4BBUS)
818 & readl(sock->addr + SOCK_MMCSD_CONFIG),
819 sock->addr + SOCK_MMCSD_CONFIG);
823 clk_div1 = 20000000 / ios->clock;
827 clk_div2 = 24000000 / ios->clock;
831 if ((20000000 / clk_div1) > ios->clock)
833 if ((24000000 / clk_div2) > ios->clock)
835 if ((20000000 / clk_div1) > (24000000 / clk_div2)) {
836 host->clk_freq = 20000000;
837 host->clk_div = clk_div1;
838 writel((~TIFM_CTRL_FAST_CLK)
839 & readl(sock->addr + SOCK_CONTROL),
840 sock->addr + SOCK_CONTROL);
842 host->clk_freq = 24000000;
843 host->clk_div = clk_div2;
844 writel(TIFM_CTRL_FAST_CLK
845 | readl(sock->addr + SOCK_CONTROL),
846 sock->addr + SOCK_CONTROL);
851 host->clk_div &= TIFM_MMCSD_CLKMASK;
853 | ((~TIFM_MMCSD_CLKMASK)
854 & readl(sock->addr + SOCK_MMCSD_CONFIG)),
855 sock->addr + SOCK_MMCSD_CONFIG);
857 host->open_drain = (ios->bus_mode == MMC_BUSMODE_OPENDRAIN);
859 /* chip_select : maybe later */
861 //power is set before probe / after remove
863 spin_unlock_irqrestore(&sock->lock, flags);
866 static int tifm_sd_ro(struct mmc_host *mmc)
869 struct tifm_sd *host = mmc_priv(mmc);
870 struct tifm_dev *sock = host->dev;
873 spin_lock_irqsave(&sock->lock, flags);
874 if (TIFM_MMCSD_CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE))
876 spin_unlock_irqrestore(&sock->lock, flags);
880 static const struct mmc_host_ops tifm_sd_ops = {
881 .request = tifm_sd_request,
882 .set_ios = tifm_sd_ios,
886 static int tifm_sd_initialize_host(struct tifm_sd *host)
889 unsigned int host_status = 0;
890 struct tifm_dev *sock = host->dev;
892 writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
895 host->clk_freq = 20000000;
896 writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL);
897 writel(host->clk_div | TIFM_MMCSD_POWER,
898 sock->addr + SOCK_MMCSD_CONFIG);
900 /* wait up to 0.51 sec for reset */
901 for (rc = 32; rc <= 256; rc <<= 1) {
902 if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) {
910 printk(KERN_ERR "%s : controller failed to reset\n",
915 writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
916 writel(host->clk_div | TIFM_MMCSD_POWER,
917 sock->addr + SOCK_MMCSD_CONFIG);
918 writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
920 // command timeout fixed to 64 clocks for now
921 writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO);
922 writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND);
924 for (rc = 16; rc <= 64; rc <<= 1) {
925 host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
926 writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
927 if (!(host_status & TIFM_MMCSD_ERRMASK)
928 && (host_status & TIFM_MMCSD_EOC)) {
937 "%s : card not ready - probe failed on initialization\n",
942 writel(TIFM_MMCSD_CERR | TIFM_MMCSD_BRS | TIFM_MMCSD_EOC
943 | TIFM_MMCSD_ERRMASK,
944 sock->addr + SOCK_MMCSD_INT_ENABLE);
950 static int tifm_sd_probe(struct tifm_dev *sock)
952 struct mmc_host *mmc;
953 struct tifm_sd *host;
956 if (!(TIFM_SOCK_STATE_OCCUPIED
957 & readl(sock->addr + SOCK_PRESENT_STATE))) {
958 printk(KERN_WARNING "%s : card gone, unexpectedly\n",
963 mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev);
967 host = mmc_priv(mmc);
968 host->no_dma = no_dma;
969 tifm_set_drvdata(sock, mmc);
971 host->timeout_jiffies = msecs_to_jiffies(1000);
973 tasklet_init(&host->finish_tasklet, tifm_sd_end_cmd,
974 (unsigned long)host);
975 setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host);
977 mmc->ops = &tifm_sd_ops;
978 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
979 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
980 mmc->f_min = 20000000 / 60;
981 mmc->f_max = 24000000;
983 mmc->max_blk_count = 2048;
984 mmc->max_hw_segs = mmc->max_blk_count;
985 mmc->max_blk_size = min(TIFM_MMCSD_MAX_BLOCK_SIZE, PAGE_SIZE);
986 mmc->max_seg_size = mmc->max_blk_count * mmc->max_blk_size;
987 mmc->max_req_size = mmc->max_seg_size;
988 mmc->max_phys_segs = mmc->max_hw_segs;
990 sock->card_event = tifm_sd_card_event;
991 sock->data_event = tifm_sd_data_event;
992 rc = tifm_sd_initialize_host(host);
995 rc = mmc_add_host(mmc);
1003 static void tifm_sd_remove(struct tifm_dev *sock)
1005 struct mmc_host *mmc = tifm_get_drvdata(sock);
1006 struct tifm_sd *host = mmc_priv(mmc);
1007 unsigned long flags;
1009 spin_lock_irqsave(&sock->lock, flags);
1011 writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
1013 spin_unlock_irqrestore(&sock->lock, flags);
1015 tasklet_kill(&host->finish_tasklet);
1017 spin_lock_irqsave(&sock->lock, flags);
1019 writel(TIFM_FIFO_INT_SETALL,
1020 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
1021 writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
1022 host->req->cmd->error = -ENOMEDIUM;
1023 if (host->req->stop)
1024 host->req->stop->error = -ENOMEDIUM;
1025 tasklet_schedule(&host->finish_tasklet);
1027 spin_unlock_irqrestore(&sock->lock, flags);
1028 mmc_remove_host(mmc);
1029 dev_dbg(&sock->dev, "after remove\n");
1036 static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state)
1038 return mmc_suspend_host(tifm_get_drvdata(sock), state);
1041 static int tifm_sd_resume(struct tifm_dev *sock)
1043 struct mmc_host *mmc = tifm_get_drvdata(sock);
1044 struct tifm_sd *host = mmc_priv(mmc);
1047 rc = tifm_sd_initialize_host(host);
1048 dev_dbg(&sock->dev, "resume initialize %d\n", rc);
1053 rc = mmc_resume_host(mmc);
1060 #define tifm_sd_suspend NULL
1061 #define tifm_sd_resume NULL
1063 #endif /* CONFIG_PM */
1065 static struct tifm_device_id tifm_sd_id_tbl[] = {
1066 { TIFM_TYPE_SD }, { }
1069 static struct tifm_driver tifm_sd_driver = {
1071 .name = DRIVER_NAME,
1072 .owner = THIS_MODULE
1074 .id_table = tifm_sd_id_tbl,
1075 .probe = tifm_sd_probe,
1076 .remove = tifm_sd_remove,
1077 .suspend = tifm_sd_suspend,
1078 .resume = tifm_sd_resume
1081 static int __init tifm_sd_init(void)
1083 return tifm_register_driver(&tifm_sd_driver);
1086 static void __exit tifm_sd_exit(void)
1088 tifm_unregister_driver(&tifm_sd_driver);
1091 MODULE_AUTHOR("Alex Dubov");
1092 MODULE_DESCRIPTION("TI FlashMedia SD driver");
1093 MODULE_LICENSE("GPL");
1094 MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl);
1095 MODULE_VERSION(DRIVER_VERSION);
1097 module_init(tifm_sd_init);
1098 module_exit(tifm_sd_exit);