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.
13 #include <linux/tifm.h>
14 #include <linux/mmc/protocol.h>
15 #include <linux/mmc/host.h>
16 #include <linux/highmem.h>
19 #define DRIVER_NAME "tifm_sd"
20 #define DRIVER_VERSION "0.7"
22 static int no_dma = 0;
23 static int fixed_timeout = 0;
24 module_param(no_dma, bool, 0644);
25 module_param(fixed_timeout, bool, 0644);
27 /* Constants here are mostly from OMAP5912 datasheet */
28 #define TIFM_MMCSD_RESET 0x0002
29 #define TIFM_MMCSD_CLKMASK 0x03ff
30 #define TIFM_MMCSD_POWER 0x0800
31 #define TIFM_MMCSD_4BBUS 0x8000
32 #define TIFM_MMCSD_RXDE 0x8000 /* rx dma enable */
33 #define TIFM_MMCSD_TXDE 0x0080 /* tx dma enable */
34 #define TIFM_MMCSD_BUFINT 0x0c00 /* set bits: AE, AF */
35 #define TIFM_MMCSD_DPE 0x0020 /* data timeout counted in kilocycles */
36 #define TIFM_MMCSD_INAB 0x0080 /* abort / initialize command */
37 #define TIFM_MMCSD_READ 0x8000
39 #define TIFM_MMCSD_DATAMASK 0x001d /* set bits: EOFB, BRS, CB, EOC */
40 #define TIFM_MMCSD_ERRMASK 0x41e0 /* set bits: CERR, CCRC, CTO, DCRC, DTO */
41 #define TIFM_MMCSD_EOC 0x0001 /* end of command phase */
42 #define TIFM_MMCSD_CB 0x0004 /* card enter busy state */
43 #define TIFM_MMCSD_BRS 0x0008 /* block received/sent */
44 #define TIFM_MMCSD_EOFB 0x0010 /* card exit busy state */
45 #define TIFM_MMCSD_DTO 0x0020 /* data time-out */
46 #define TIFM_MMCSD_DCRC 0x0040 /* data crc error */
47 #define TIFM_MMCSD_CTO 0x0080 /* command time-out */
48 #define TIFM_MMCSD_CCRC 0x0100 /* command crc error */
49 #define TIFM_MMCSD_AF 0x0400 /* fifo almost full */
50 #define TIFM_MMCSD_AE 0x0800 /* fifo almost empty */
51 #define TIFM_MMCSD_CERR 0x4000 /* card status error */
53 #define TIFM_MMCSD_FIFO_SIZE 0x0020
55 #define TIFM_MMCSD_RSP_R0 0x0000
56 #define TIFM_MMCSD_RSP_R1 0x0100
57 #define TIFM_MMCSD_RSP_R2 0x0200
58 #define TIFM_MMCSD_RSP_R3 0x0300
59 #define TIFM_MMCSD_RSP_R4 0x0400
60 #define TIFM_MMCSD_RSP_R5 0x0500
61 #define TIFM_MMCSD_RSP_R6 0x0600
63 #define TIFM_MMCSD_RSP_BUSY 0x0800
65 #define TIFM_MMCSD_CMD_BC 0x0000
66 #define TIFM_MMCSD_CMD_BCR 0x1000
67 #define TIFM_MMCSD_CMD_AC 0x2000
68 #define TIFM_MMCSD_CMD_ADTC 0x3000
72 CMD, /* main command ended */
73 BRS, /* block transfer finished */
74 SCMD, /* stop command ended */
75 CARD, /* card left busy state */
76 FIFO, /* FIFO operation completed (uncertain) */
81 FIFO_RDY = 0x0001, /* hardware dependent value */
85 OPENDRAIN = 0x0040, /* hardware dependent value */
86 CARD_EVENT = 0x0100, /* hardware dependent value */
87 CARD_RO = 0x0200, /* hardware dependent value */
88 FIFO_EVENT = 0x10000 }; /* hardware dependent value */
95 unsigned int clk_freq;
97 unsigned long timeout_jiffies;
99 struct tasklet_struct finish_tasklet;
100 struct timer_list timer;
101 struct mmc_request *req;
102 wait_queue_head_t notify;
104 size_t written_blocks;
110 static char* tifm_sd_kmap_atomic(struct mmc_data *data)
112 return kmap_atomic(data->sg->page, KM_BIO_SRC_IRQ) + data->sg->offset;
115 static void tifm_sd_kunmap_atomic(char *buffer, struct mmc_data *data)
117 kunmap_atomic(buffer - data->sg->offset, KM_BIO_SRC_IRQ);
120 static int tifm_sd_transfer_data(struct tifm_dev *sock, struct tifm_sd *host,
121 unsigned int host_status)
123 struct mmc_command *cmd = host->req->cmd;
124 unsigned int t_val = 0, cnt = 0;
127 if (host_status & TIFM_MMCSD_BRS) {
128 /* in non-dma rx mode BRS fires when fifo is still not empty */
129 if (no_dma && (cmd->data->flags & MMC_DATA_READ)) {
130 buffer = tifm_sd_kmap_atomic(host->req->data);
131 while (host->buffer_size > host->buffer_pos) {
132 t_val = readl(sock->addr + SOCK_MMCSD_DATA);
133 buffer[host->buffer_pos++] = t_val & 0xff;
134 buffer[host->buffer_pos++] =
137 tifm_sd_kunmap_atomic(buffer, host->req->data);
141 buffer = tifm_sd_kmap_atomic(host->req->data);
142 if ((cmd->data->flags & MMC_DATA_READ) &&
143 (host_status & TIFM_MMCSD_AF)) {
144 for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) {
145 t_val = readl(sock->addr + SOCK_MMCSD_DATA);
146 if (host->buffer_size > host->buffer_pos) {
147 buffer[host->buffer_pos++] =
149 buffer[host->buffer_pos++] =
153 } else if ((cmd->data->flags & MMC_DATA_WRITE)
154 && (host_status & TIFM_MMCSD_AE)) {
155 for (cnt = 0; cnt < TIFM_MMCSD_FIFO_SIZE; cnt++) {
156 if (host->buffer_size > host->buffer_pos) {
157 t_val = buffer[host->buffer_pos++]
159 t_val |= ((buffer[host->buffer_pos++])
162 sock->addr + SOCK_MMCSD_DATA);
166 tifm_sd_kunmap_atomic(buffer, host->req->data);
171 static unsigned int tifm_sd_op_flags(struct mmc_command *cmd)
175 switch (mmc_resp_type(cmd)) {
177 rc |= TIFM_MMCSD_RSP_R0;
180 rc |= TIFM_MMCSD_RSP_BUSY; // deliberate fall-through
182 rc |= TIFM_MMCSD_RSP_R1;
185 rc |= TIFM_MMCSD_RSP_R2;
188 rc |= TIFM_MMCSD_RSP_R3;
194 switch (mmc_cmd_type(cmd)) {
196 rc |= TIFM_MMCSD_CMD_BC;
199 rc |= TIFM_MMCSD_CMD_BCR;
202 rc |= TIFM_MMCSD_CMD_AC;
205 rc |= TIFM_MMCSD_CMD_ADTC;
213 static void tifm_sd_exec(struct tifm_sd *host, struct mmc_command *cmd)
215 struct tifm_dev *sock = host->dev;
216 unsigned int cmd_mask = tifm_sd_op_flags(cmd) |
217 (host->flags & OPENDRAIN);
219 if (cmd->data && (cmd->data->flags & MMC_DATA_READ))
220 cmd_mask |= TIFM_MMCSD_READ;
222 dev_dbg(&sock->dev, "executing opcode 0x%x, arg: 0x%x, mask: 0x%x\n",
223 cmd->opcode, cmd->arg, cmd_mask);
225 writel((cmd->arg >> 16) & 0xffff, sock->addr + SOCK_MMCSD_ARG_HIGH);
226 writel(cmd->arg & 0xffff, sock->addr + SOCK_MMCSD_ARG_LOW);
227 writel(cmd->opcode | cmd_mask, sock->addr + SOCK_MMCSD_COMMAND);
230 static void tifm_sd_fetch_resp(struct mmc_command *cmd, struct tifm_dev *sock)
232 cmd->resp[0] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x1c) << 16)
233 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x18);
234 cmd->resp[1] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x14) << 16)
235 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x10);
236 cmd->resp[2] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x0c) << 16)
237 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x08);
238 cmd->resp[3] = (readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x04) << 16)
239 | readl(sock->addr + SOCK_MMCSD_RESPONSE + 0x00);
242 static void tifm_sd_process_cmd(struct tifm_dev *sock, struct tifm_sd *host,
243 unsigned int host_status)
245 struct mmc_command *cmd = host->req->cmd;
248 switch (host->state) {
252 if (host_status & TIFM_MMCSD_EOC) {
253 tifm_sd_fetch_resp(cmd, sock);
263 if (tifm_sd_transfer_data(sock, host, host_status)) {
264 if (cmd->data->flags & MMC_DATA_WRITE) {
268 if (host->req->stop) {
269 tifm_sd_exec(host, host->req->stop);
282 if (host_status & TIFM_MMCSD_EOC) {
283 tifm_sd_fetch_resp(host->req->stop, sock);
289 dev_dbg(&sock->dev, "waiting for CARD, have %zd blocks\n",
290 host->written_blocks);
291 if (!(host->flags & CARD_BUSY)
292 && (host->written_blocks == cmd->data->blocks)) {
294 if (host->req->stop) {
295 tifm_sd_exec(host, host->req->stop);
307 if (host->flags & FIFO_RDY) {
308 host->flags &= ~FIFO_RDY;
309 if (host->req->stop) {
310 tifm_sd_exec(host, host->req->stop);
319 tasklet_schedule(&host->finish_tasklet);
325 /* Called from interrupt handler */
326 static unsigned int tifm_sd_signal_irq(struct tifm_dev *sock,
327 unsigned int sock_irq_status)
329 struct tifm_sd *host;
330 unsigned int host_status = 0, fifo_status = 0;
333 spin_lock(&sock->lock);
334 host = mmc_priv((struct mmc_host*)tifm_get_drvdata(sock));
336 if (sock_irq_status & FIFO_EVENT) {
337 fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
338 writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
340 host->flags |= fifo_status & FIFO_RDY;
343 if (sock_irq_status & CARD_EVENT) {
344 host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
345 writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
350 if (host_status & TIFM_MMCSD_ERRMASK) {
351 if (host_status & TIFM_MMCSD_CERR)
352 error_code = MMC_ERR_FAILED;
354 & (TIFM_MMCSD_CTO | TIFM_MMCSD_DTO))
355 error_code = MMC_ERR_TIMEOUT;
357 & (TIFM_MMCSD_CCRC | TIFM_MMCSD_DCRC))
358 error_code = MMC_ERR_BADCRC;
360 writel(TIFM_FIFO_INT_SETALL,
361 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
362 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
364 if (host->req->stop) {
365 if (host->state == SCMD) {
366 host->req->stop->error = error_code;
367 } else if (host->state == BRS
368 || host->state == CARD
369 || host->state == FIFO) {
370 host->req->cmd->error = error_code;
371 tifm_sd_exec(host, host->req->stop);
375 host->req->cmd->error = error_code;
378 host->req->cmd->error = error_code;
383 if (host_status & TIFM_MMCSD_CB)
384 host->flags |= CARD_BUSY;
385 if ((host_status & TIFM_MMCSD_EOFB)
386 && (host->flags & CARD_BUSY)) {
387 host->written_blocks++;
388 host->flags &= ~CARD_BUSY;
393 tifm_sd_process_cmd(sock, host, host_status);
395 dev_dbg(&sock->dev, "host_status %x, fifo_status %x\n",
396 host_status, fifo_status);
397 spin_unlock(&sock->lock);
398 return sock_irq_status;
401 static void tifm_sd_prepare_data(struct tifm_sd *host, struct mmc_command *cmd)
403 struct tifm_dev *sock = host->dev;
404 unsigned int dest_cnt;
407 dev_dbg(&sock->dev, "setting dma for %d blocks\n",
409 writel(TIFM_FIFO_INT_SETALL,
410 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
411 writel(ilog2(cmd->data->blksz) - 2,
412 sock->addr + SOCK_FIFO_PAGE_SIZE);
413 writel(TIFM_FIFO_ENABLE, sock->addr + SOCK_FIFO_CONTROL);
414 writel(TIFM_FIFO_INTMASK, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
416 dest_cnt = (cmd->data->blocks) << 8;
418 writel(sg_dma_address(cmd->data->sg), sock->addr + SOCK_DMA_ADDRESS);
420 writel(cmd->data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
421 writel(cmd->data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN);
423 if (cmd->data->flags & MMC_DATA_WRITE) {
424 writel(TIFM_MMCSD_TXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
425 writel(dest_cnt | TIFM_DMA_TX | TIFM_DMA_EN,
426 sock->addr + SOCK_DMA_CONTROL);
428 writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
429 writel(dest_cnt | TIFM_DMA_EN, sock->addr + SOCK_DMA_CONTROL);
433 static void tifm_sd_set_data_timeout(struct tifm_sd *host,
434 struct mmc_data *data)
436 struct tifm_dev *sock = host->dev;
437 unsigned int data_timeout = data->timeout_clks;
442 data_timeout += data->timeout_ns /
443 ((1000000000UL / host->clk_freq) * host->clk_div);
445 if (data_timeout < 0xffff) {
446 writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
447 writel((~TIFM_MMCSD_DPE)
448 & readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
449 sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
451 data_timeout = (data_timeout >> 10) + 1;
452 if (data_timeout > 0xffff)
453 data_timeout = 0; /* set to unlimited */
454 writel(data_timeout, sock->addr + SOCK_MMCSD_DATA_TO);
455 writel(TIFM_MMCSD_DPE
456 | readl(sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG),
457 sock->addr + SOCK_MMCSD_SDIO_MODE_CONFIG);
461 static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
463 struct tifm_sd *host = mmc_priv(mmc);
464 struct tifm_dev *sock = host->dev;
467 struct mmc_data *r_data = mrq->cmd->data;
469 spin_lock_irqsave(&sock->lock, flags);
470 if (host->flags & EJECT) {
471 spin_unlock_irqrestore(&sock->lock, flags);
476 printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n");
477 spin_unlock_irqrestore(&sock->lock, flags);
482 tifm_sd_set_data_timeout(host, r_data);
484 sg_count = tifm_map_sg(sock, r_data->sg, r_data->sg_len,
485 mrq->cmd->flags & MMC_DATA_WRITE
486 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
488 printk(KERN_ERR DRIVER_NAME
489 ": scatterlist map failed\n");
490 spin_unlock_irqrestore(&sock->lock, flags);
494 host->written_blocks = 0;
495 host->flags &= ~CARD_BUSY;
496 tifm_sd_prepare_data(host, mrq->cmd);
500 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
502 writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
503 sock->addr + SOCK_CONTROL);
504 tifm_sd_exec(host, mrq->cmd);
505 spin_unlock_irqrestore(&sock->lock, flags);
510 tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
511 (r_data->flags & MMC_DATA_WRITE)
512 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
514 mrq->cmd->error = MMC_ERR_TIMEOUT;
515 mmc_request_done(mmc, mrq);
518 static void tifm_sd_end_cmd(unsigned long data)
520 struct tifm_sd *host = (struct tifm_sd*)data;
521 struct tifm_dev *sock = host->dev;
522 struct mmc_host *mmc = tifm_get_drvdata(sock);
523 struct mmc_request *mrq;
524 struct mmc_data *r_data = NULL;
527 spin_lock_irqsave(&sock->lock, flags);
529 del_timer(&host->timer);
535 printk(KERN_ERR DRIVER_NAME ": no request to complete?\n");
536 spin_unlock_irqrestore(&sock->lock, flags);
540 r_data = mrq->cmd->data;
542 if (r_data->flags & MMC_DATA_WRITE) {
543 r_data->bytes_xfered = host->written_blocks
546 r_data->bytes_xfered = r_data->blocks -
547 readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
548 r_data->bytes_xfered *= r_data->blksz;
549 r_data->bytes_xfered += r_data->blksz -
550 readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
552 tifm_unmap_sg(sock, r_data->sg, r_data->sg_len,
553 (r_data->flags & MMC_DATA_WRITE)
554 ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
557 writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
558 sock->addr + SOCK_CONTROL);
560 spin_unlock_irqrestore(&sock->lock, flags);
561 mmc_request_done(mmc, mrq);
564 static void tifm_sd_request_nodma(struct mmc_host *mmc, struct mmc_request *mrq)
566 struct tifm_sd *host = mmc_priv(mmc);
567 struct tifm_dev *sock = host->dev;
569 struct mmc_data *r_data = mrq->cmd->data;
571 spin_lock_irqsave(&sock->lock, flags);
572 if (host->flags & EJECT) {
573 spin_unlock_irqrestore(&sock->lock, flags);
578 printk(KERN_ERR DRIVER_NAME ": unfinished request detected\n");
579 spin_unlock_irqrestore(&sock->lock, flags);
584 tifm_sd_set_data_timeout(host, r_data);
586 host->buffer_size = mrq->cmd->data->blocks
587 * mrq->cmd->data->blksz;
589 writel(TIFM_MMCSD_BUFINT
590 | readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
591 sock->addr + SOCK_MMCSD_INT_ENABLE);
592 writel(((TIFM_MMCSD_FIFO_SIZE - 1) << 8)
593 | (TIFM_MMCSD_FIFO_SIZE - 1),
594 sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
596 host->written_blocks = 0;
597 host->flags &= ~CARD_BUSY;
598 host->buffer_pos = 0;
599 writel(r_data->blocks - 1, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
600 writel(r_data->blksz - 1, sock->addr + SOCK_MMCSD_BLOCK_LEN);
604 mod_timer(&host->timer, jiffies + host->timeout_jiffies);
606 writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
607 sock->addr + SOCK_CONTROL);
608 tifm_sd_exec(host, mrq->cmd);
609 spin_unlock_irqrestore(&sock->lock, flags);
613 mrq->cmd->error = MMC_ERR_TIMEOUT;
614 mmc_request_done(mmc, mrq);
617 static void tifm_sd_end_cmd_nodma(unsigned long data)
619 struct tifm_sd *host = (struct tifm_sd*)data;
620 struct tifm_dev *sock = host->dev;
621 struct mmc_host *mmc = tifm_get_drvdata(sock);
622 struct mmc_request *mrq;
623 struct mmc_data *r_data = NULL;
626 spin_lock_irqsave(&sock->lock, flags);
628 del_timer(&host->timer);
634 printk(KERN_ERR DRIVER_NAME ": no request to complete?\n");
635 spin_unlock_irqrestore(&sock->lock, flags);
639 r_data = mrq->cmd->data;
641 writel((~TIFM_MMCSD_BUFINT) &
642 readl(sock->addr + SOCK_MMCSD_INT_ENABLE),
643 sock->addr + SOCK_MMCSD_INT_ENABLE);
645 if (r_data->flags & MMC_DATA_WRITE) {
646 r_data->bytes_xfered = host->written_blocks
649 r_data->bytes_xfered = r_data->blocks -
650 readl(sock->addr + SOCK_MMCSD_NUM_BLOCKS) - 1;
651 r_data->bytes_xfered *= r_data->blksz;
652 r_data->bytes_xfered += r_data->blksz -
653 readl(sock->addr + SOCK_MMCSD_BLOCK_LEN) + 1;
655 host->buffer_pos = 0;
656 host->buffer_size = 0;
659 writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
660 sock->addr + SOCK_CONTROL);
662 spin_unlock_irqrestore(&sock->lock, flags);
664 mmc_request_done(mmc, mrq);
667 static void tifm_sd_terminate(struct tifm_sd *host)
669 struct tifm_dev *sock = host->dev;
672 writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
674 spin_lock_irqsave(&sock->lock, flags);
675 host->flags |= EJECT;
677 writel(TIFM_FIFO_INT_SETALL,
678 sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
679 writel(0, sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
680 tasklet_schedule(&host->finish_tasklet);
682 spin_unlock_irqrestore(&sock->lock, flags);
685 static void tifm_sd_abort(unsigned long data)
687 struct tifm_sd *host = (struct tifm_sd*)data;
689 printk(KERN_ERR DRIVER_NAME
690 ": card failed to respond for a long period of time");
692 tifm_sd_terminate(host);
693 tifm_eject(host->dev);
696 static void tifm_sd_ios(struct mmc_host *mmc, struct mmc_ios *ios)
698 struct tifm_sd *host = mmc_priv(mmc);
699 struct tifm_dev *sock = host->dev;
700 unsigned int clk_div1, clk_div2;
703 spin_lock_irqsave(&sock->lock, flags);
705 dev_dbg(&sock->dev, "Setting bus width %d, power %d\n", ios->bus_width,
707 if (ios->bus_width == MMC_BUS_WIDTH_4) {
708 writel(TIFM_MMCSD_4BBUS | readl(sock->addr + SOCK_MMCSD_CONFIG),
709 sock->addr + SOCK_MMCSD_CONFIG);
711 writel((~TIFM_MMCSD_4BBUS)
712 & readl(sock->addr + SOCK_MMCSD_CONFIG),
713 sock->addr + SOCK_MMCSD_CONFIG);
717 clk_div1 = 20000000 / ios->clock;
721 clk_div2 = 24000000 / ios->clock;
725 if ((20000000 / clk_div1) > ios->clock)
727 if ((24000000 / clk_div2) > ios->clock)
729 if ((20000000 / clk_div1) > (24000000 / clk_div2)) {
730 host->clk_freq = 20000000;
731 host->clk_div = clk_div1;
732 writel((~TIFM_CTRL_FAST_CLK)
733 & readl(sock->addr + SOCK_CONTROL),
734 sock->addr + SOCK_CONTROL);
736 host->clk_freq = 24000000;
737 host->clk_div = clk_div2;
738 writel(TIFM_CTRL_FAST_CLK
739 | readl(sock->addr + SOCK_CONTROL),
740 sock->addr + SOCK_CONTROL);
745 host->clk_div &= TIFM_MMCSD_CLKMASK;
747 | ((~TIFM_MMCSD_CLKMASK)
748 & readl(sock->addr + SOCK_MMCSD_CONFIG)),
749 sock->addr + SOCK_MMCSD_CONFIG);
751 if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
752 host->flags |= OPENDRAIN;
754 host->flags &= ~OPENDRAIN;
756 /* chip_select : maybe later */
758 //power is set before probe / after remove
759 //I believe, power_off when already marked for eject is sufficient to
761 if ((host->flags & EJECT) && ios->power_mode == MMC_POWER_OFF) {
762 host->flags |= EJECT_DONE;
763 wake_up_all(&host->notify);
766 spin_unlock_irqrestore(&sock->lock, flags);
769 static int tifm_sd_ro(struct mmc_host *mmc)
772 struct tifm_sd *host = mmc_priv(mmc);
773 struct tifm_dev *sock = host->dev;
776 spin_lock_irqsave(&sock->lock, flags);
778 host->flags |= (CARD_RO & readl(sock->addr + SOCK_PRESENT_STATE));
779 rc = (host->flags & CARD_RO) ? 1 : 0;
781 spin_unlock_irqrestore(&sock->lock, flags);
785 static struct mmc_host_ops tifm_sd_ops = {
786 .request = tifm_sd_request,
787 .set_ios = tifm_sd_ios,
791 static int tifm_sd_initialize_host(struct tifm_sd *host)
794 unsigned int host_status = 0;
795 struct tifm_dev *sock = host->dev;
797 writel(0, sock->addr + SOCK_MMCSD_INT_ENABLE);
800 host->clk_freq = 20000000;
801 writel(TIFM_MMCSD_RESET, sock->addr + SOCK_MMCSD_SYSTEM_CONTROL);
802 writel(host->clk_div | TIFM_MMCSD_POWER,
803 sock->addr + SOCK_MMCSD_CONFIG);
805 /* wait up to 0.51 sec for reset */
806 for (rc = 2; rc <= 256; rc <<= 1) {
807 if (1 & readl(sock->addr + SOCK_MMCSD_SYSTEM_STATUS)) {
815 printk(KERN_ERR DRIVER_NAME
816 ": controller failed to reset\n");
820 writel(0, sock->addr + SOCK_MMCSD_NUM_BLOCKS);
821 writel(host->clk_div | TIFM_MMCSD_POWER,
822 sock->addr + SOCK_MMCSD_CONFIG);
823 writel(TIFM_MMCSD_RXDE, sock->addr + SOCK_MMCSD_BUFFER_CONFIG);
825 // command timeout fixed to 64 clocks for now
826 writel(64, sock->addr + SOCK_MMCSD_COMMAND_TO);
827 writel(TIFM_MMCSD_INAB, sock->addr + SOCK_MMCSD_COMMAND);
829 /* INAB should take much less than reset */
830 for (rc = 1; rc <= 16; rc <<= 1) {
831 host_status = readl(sock->addr + SOCK_MMCSD_STATUS);
832 writel(host_status, sock->addr + SOCK_MMCSD_STATUS);
833 if (!(host_status & TIFM_MMCSD_ERRMASK)
834 && (host_status & TIFM_MMCSD_EOC)) {
842 printk(KERN_ERR DRIVER_NAME
843 ": card not ready - probe failed on initialization\n");
847 writel(TIFM_MMCSD_DATAMASK | TIFM_MMCSD_ERRMASK,
848 sock->addr + SOCK_MMCSD_INT_ENABLE);
854 static int tifm_sd_probe(struct tifm_dev *sock)
856 struct mmc_host *mmc;
857 struct tifm_sd *host;
860 if (!(TIFM_SOCK_STATE_OCCUPIED
861 & readl(sock->addr + SOCK_PRESENT_STATE))) {
862 printk(KERN_WARNING DRIVER_NAME ": card gone, unexpectedly\n");
866 mmc = mmc_alloc_host(sizeof(struct tifm_sd), &sock->dev);
870 host = mmc_priv(mmc);
871 tifm_set_drvdata(sock, mmc);
873 host->timeout_jiffies = msecs_to_jiffies(1000);
875 init_waitqueue_head(&host->notify);
876 tasklet_init(&host->finish_tasklet,
877 no_dma ? tifm_sd_end_cmd_nodma : tifm_sd_end_cmd,
878 (unsigned long)host);
879 setup_timer(&host->timer, tifm_sd_abort, (unsigned long)host);
881 tifm_sd_ops.request = no_dma ? tifm_sd_request_nodma : tifm_sd_request;
882 mmc->ops = &tifm_sd_ops;
883 mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
884 mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_MULTIWRITE;
885 mmc->f_min = 20000000 / 60;
886 mmc->f_max = 24000000;
887 mmc->max_hw_segs = 1;
888 mmc->max_phys_segs = 1;
889 mmc->max_sectors = 127;
890 mmc->max_seg_size = mmc->max_sectors << 11; //2k maximum hw block length
891 sock->signal_irq = tifm_sd_signal_irq;
892 rc = tifm_sd_initialize_host(host);
895 rc = mmc_add_host(mmc);
905 static void tifm_sd_remove(struct tifm_dev *sock)
907 struct mmc_host *mmc = tifm_get_drvdata(sock);
908 struct tifm_sd *host = mmc_priv(mmc);
910 del_timer_sync(&host->timer);
911 tifm_sd_terminate(host);
912 wait_event_timeout(host->notify, host->flags & EJECT_DONE,
913 host->timeout_jiffies);
914 tasklet_kill(&host->finish_tasklet);
915 mmc_remove_host(mmc);
917 /* The meaning of the bit majority in this constant is unknown. */
918 writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
919 sock->addr + SOCK_CONTROL);
921 tifm_set_drvdata(sock, NULL);
925 static tifm_media_id tifm_sd_id_tbl[] = {
929 static struct tifm_driver tifm_sd_driver = {
934 .id_table = tifm_sd_id_tbl,
935 .probe = tifm_sd_probe,
936 .remove = tifm_sd_remove
939 static int __init tifm_sd_init(void)
941 return tifm_register_driver(&tifm_sd_driver);
944 static void __exit tifm_sd_exit(void)
946 tifm_unregister_driver(&tifm_sd_driver);
949 MODULE_AUTHOR("Alex Dubov");
950 MODULE_DESCRIPTION("TI FlashMedia SD driver");
951 MODULE_LICENSE("GPL");
952 MODULE_DEVICE_TABLE(tifm, tifm_sd_id_tbl);
953 MODULE_VERSION(DRIVER_VERSION);
955 module_init(tifm_sd_init);
956 module_exit(tifm_sd_exit);