![Stefan Nilsson XK](/assets/img/avatar_default.png)
Adds a quirk which can be turned on for SDIO devices that do not support 512 byte requests in byte mode during CMD53. These requests will always be sent in block mode instead. This patch also enables this quirk for ST-Ericsson CW1200 WLAN device. Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com> Signed-off-by: Ulf HANSSON <ulf.hansson@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
204 lines
4.3 KiB
C
204 lines
4.3 KiB
C
/*
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* linux/drivers/mmc/sdio_ops.c
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*
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* Copyright 2006-2007 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <linux/scatterlist.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/sdio.h>
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#include "core.h"
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#include "sdio_ops.h"
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int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
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{
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struct mmc_command cmd = {0};
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int i, err = 0;
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BUG_ON(!host);
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cmd.opcode = SD_IO_SEND_OP_COND;
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cmd.arg = ocr;
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cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
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for (i = 100; i; i--) {
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err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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if (err)
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break;
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/* if we're just probing, do a single pass */
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if (ocr == 0)
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break;
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/* otherwise wait until reset completes */
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if (mmc_host_is_spi(host)) {
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/*
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* Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
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* an initialized card under SPI, but some cards
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* (Marvell's) only behave when looking at this
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* one.
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*/
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if (cmd.resp[1] & MMC_CARD_BUSY)
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break;
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} else {
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if (cmd.resp[0] & MMC_CARD_BUSY)
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break;
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}
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err = -ETIMEDOUT;
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mmc_delay(10);
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}
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if (rocr)
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*rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
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return err;
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}
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static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
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unsigned addr, u8 in, u8 *out)
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{
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struct mmc_command cmd = {0};
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int err;
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BUG_ON(!host);
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BUG_ON(fn > 7);
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/* sanity check */
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if (addr & ~0x1FFFF)
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return -EINVAL;
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cmd.opcode = SD_IO_RW_DIRECT;
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cmd.arg = write ? 0x80000000 : 0x00000000;
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cmd.arg |= fn << 28;
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cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
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cmd.arg |= addr << 9;
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cmd.arg |= in;
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cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
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err = mmc_wait_for_cmd(host, &cmd, 0);
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if (err)
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return err;
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if (mmc_host_is_spi(host)) {
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/* host driver already reported errors */
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} else {
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if (cmd.resp[0] & R5_ERROR)
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return -EIO;
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if (cmd.resp[0] & R5_FUNCTION_NUMBER)
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return -EINVAL;
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if (cmd.resp[0] & R5_OUT_OF_RANGE)
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return -ERANGE;
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}
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if (out) {
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if (mmc_host_is_spi(host))
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*out = (cmd.resp[0] >> 8) & 0xFF;
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else
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*out = cmd.resp[0] & 0xFF;
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}
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return 0;
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}
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int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
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unsigned addr, u8 in, u8 *out)
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{
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BUG_ON(!card);
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return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out);
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}
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int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
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unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
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{
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struct mmc_request mrq = {NULL};
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struct mmc_command cmd = {0};
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struct mmc_data data = {0};
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struct scatterlist sg;
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BUG_ON(!card);
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BUG_ON(fn > 7);
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BUG_ON(blocks == 1 && blksz > 512);
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WARN_ON(blocks == 0);
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WARN_ON(blksz == 0);
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/* sanity check */
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if (addr & ~0x1FFFF)
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return -EINVAL;
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mrq.cmd = &cmd;
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mrq.data = &data;
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cmd.opcode = SD_IO_RW_EXTENDED;
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cmd.arg = write ? 0x80000000 : 0x00000000;
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cmd.arg |= fn << 28;
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cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
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cmd.arg |= addr << 9;
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if (blocks == 1 && blksz < 512)
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cmd.arg |= blksz; /* byte mode */
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else if (blocks == 1 && blksz == 512 &&
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!(mmc_card_broken_byte_mode_512(card)))
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cmd.arg |= 0; /* byte mode, 0==512 */
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else
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cmd.arg |= 0x08000000 | blocks; /* block mode */
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cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
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data.blksz = blksz;
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data.blocks = blocks;
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data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
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data.sg = &sg;
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data.sg_len = 1;
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sg_init_one(&sg, buf, blksz * blocks);
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mmc_set_data_timeout(&data, card);
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mmc_wait_for_req(card->host, &mrq);
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if (cmd.error)
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return cmd.error;
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if (data.error)
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return data.error;
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if (mmc_host_is_spi(card->host)) {
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/* host driver already reported errors */
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} else {
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if (cmd.resp[0] & R5_ERROR)
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return -EIO;
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if (cmd.resp[0] & R5_FUNCTION_NUMBER)
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return -EINVAL;
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if (cmd.resp[0] & R5_OUT_OF_RANGE)
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return -ERANGE;
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}
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return 0;
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}
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int sdio_reset(struct mmc_host *host)
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{
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int ret;
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u8 abort;
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/* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */
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ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort);
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if (ret)
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abort = 0x08;
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else
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abort |= 0x08;
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ret = mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL);
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return ret;
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}
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