mci: Use struct mci for internal argument passing
The mci layer currently passes around a struct device_d for its internal use. Apart from being confusing this drops typesafety for no good reason. Instead, pass around a struct mci. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer
parent
f15f7d4ca0
commit
f27152ccc6
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@ -57,16 +57,16 @@
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/**
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* Call the MMC/SD instance driver to run the command on the MMC/SD card
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @param cmd The information about the command to run
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* @param data The data according to the command (can be NULL)
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* @return Driver's answer (0 on success)
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*/
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static int mci_send_cmd(struct device_d *mci_dev, struct mci_cmd *cmd, struct mci_data *data)
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static int mci_send_cmd(struct mci *mci, struct mci_cmd *cmd, struct mci_data *data)
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{
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struct mci_host *host = GET_MCI_PDATA(mci_dev);
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struct mci_host *host = mci->host;
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return host->send_cmd(host, cmd, data);
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return host->send_cmd(mci->host, cmd, data);
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}
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/**
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@ -90,12 +90,12 @@ static void mci_setup_cmd(struct mci_cmd *p, unsigned cmd, unsigned arg, unsigne
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* @param len Blocklength in bytes
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* @return Transaction status (0 on success)
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*/
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static int mci_set_blocklen(struct device_d *mci_dev, unsigned len)
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static int mci_set_blocklen(struct mci *mci, unsigned len)
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{
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struct mci_cmd cmd;
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mci_setup_cmd(&cmd, MMC_CMD_SET_BLOCKLEN, len, MMC_RSP_R1);
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return mci_send_cmd(mci_dev, &cmd, NULL);
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return mci_send_cmd(mci, &cmd, NULL);
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}
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static void *sector_buf;
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@ -108,10 +108,9 @@ static void *sector_buf;
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* @param blocks Block count to write
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* @return Transaction status (0 on success)
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*/
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static int mci_block_write(struct device_d *mci_dev, const void *src, int blocknum,
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static int mci_block_write(struct mci *mci, const void *src, int blocknum,
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int blocks)
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{
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struct mci *mci = GET_MCI_DATA(mci_dev);
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struct mci_cmd cmd;
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struct mci_data data;
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const void *buf;
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@ -140,7 +139,7 @@ static int mci_block_write(struct device_d *mci_dev, const void *src, int blockn
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data.blocksize = mci->write_bl_len;
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data.flags = MMC_DATA_WRITE;
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ret = mci_send_cmd(mci_dev, &cmd, &data);
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ret = mci_send_cmd(mci, &cmd, &data);
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if (ret)
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return ret;
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@ -148,7 +147,7 @@ static int mci_block_write(struct device_d *mci_dev, const void *src, int blockn
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mci_setup_cmd(&cmd,
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MMC_CMD_STOP_TRANSMISSION,
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0, MMC_RSP_R1b);
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ret = mci_send_cmd(mci_dev, &cmd, NULL);
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ret = mci_send_cmd(mci, &cmd, NULL);
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if (ret)
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return ret;
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}
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@ -158,15 +157,14 @@ static int mci_block_write(struct device_d *mci_dev, const void *src, int blockn
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/**
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* Read one block of data from the card
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @param dst Where to store the data read from the card
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* @param blocknum Block number to read
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* @param blocks number of blocks to read
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*/
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static int mci_read_block(struct device_d *mci_dev, void *dst, int blocknum,
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static int mci_read_block(struct mci *mci, void *dst, int blocknum,
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int blocks)
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{
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struct mci *mci = GET_MCI_DATA(mci_dev);
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struct mci_cmd cmd;
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struct mci_data data;
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int ret;
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@ -187,7 +185,7 @@ static int mci_read_block(struct device_d *mci_dev, void *dst, int blocknum,
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data.blocksize = mci->read_bl_len;
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data.flags = MMC_DATA_READ;
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ret = mci_send_cmd(mci_dev, &cmd, &data);
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ret = mci_send_cmd(mci, &cmd, &data);
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if (ret)
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return ret;
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@ -196,17 +194,17 @@ static int mci_read_block(struct device_d *mci_dev, void *dst, int blocknum,
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MMC_CMD_STOP_TRANSMISSION,
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0,
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MMC_RSP_R1b);
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ret = mci_send_cmd(mci_dev, &cmd, NULL);
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ret = mci_send_cmd(mci, &cmd, NULL);
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}
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return ret;
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}
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/**
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* Reset the attached MMC/SD card
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int mci_go_idle(struct device_d *mci_dev)
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static int mci_go_idle(struct mci *mci)
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{
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struct mci_cmd cmd;
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int err;
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@ -214,7 +212,7 @@ static int mci_go_idle(struct device_d *mci_dev)
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udelay(1000);
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mci_setup_cmd(&cmd, MMC_CMD_GO_IDLE_STATE, 0, MMC_RSP_NONE);
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err = mci_send_cmd(mci_dev, &cmd, NULL);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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pr_debug("Activating IDLE state failed: %d\n", err);
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@ -228,13 +226,12 @@ static int mci_go_idle(struct device_d *mci_dev)
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/**
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* FIXME
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int sd_send_op_cond(struct device_d *mci_dev)
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static int sd_send_op_cond(struct mci *mci)
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{
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struct mci *mci = GET_MCI_DATA(mci_dev);
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struct mci_host *host = GET_MCI_PDATA(mci_dev);
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struct mci_host *host = mci->host;
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struct mci_cmd cmd;
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int timeout = 1000;
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int err;
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@ -252,7 +249,7 @@ static int sd_send_op_cond(struct device_d *mci_dev)
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do {
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mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, 0, MMC_RSP_R1);
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err = mci_send_cmd(mci_dev, &cmd, NULL);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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pr_debug("Preparing SD for operating conditions failed: %d\n", err);
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return err;
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@ -261,7 +258,7 @@ static int sd_send_op_cond(struct device_d *mci_dev)
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mci_setup_cmd(&cmd, SD_CMD_APP_SEND_OP_COND,
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mmc_host_is_spi(host) ? 0 : (voltages | (mci->version == SD_VERSION_2 ? OCR_HCS : 0)),
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MMC_RSP_R3);
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err = mci_send_cmd(mci_dev, &cmd, NULL);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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pr_debug("SD operation condition set failed: %d\n", err);
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return err;
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@ -285,7 +282,7 @@ static int sd_send_op_cond(struct device_d *mci_dev)
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if (mmc_host_is_spi(host)) { /* read OCR for spi */
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mci_setup_cmd(&cmd, MMC_CMD_SPI_READ_OCR, 0, MMC_RSP_R3);
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err = mci_send_cmd(mci_dev, &cmd, NULL);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err)
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return err;
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}
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@ -300,24 +297,23 @@ static int sd_send_op_cond(struct device_d *mci_dev)
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/**
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* Setup the operation conditions to a MultiMediaCard
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int mmc_send_op_cond(struct device_d *mci_dev)
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static int mmc_send_op_cond(struct mci *mci)
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{
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struct mci *mci = GET_MCI_DATA(mci_dev);
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struct mci_host *host = GET_MCI_PDATA(mci_dev);
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struct mci_host *host = mci->host;
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struct mci_cmd cmd;
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int timeout = 1000;
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int err;
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/* Some cards seem to need this */
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mci_go_idle(mci_dev);
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mci_go_idle(mci);
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do {
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mci_setup_cmd(&cmd, MMC_CMD_SEND_OP_COND, OCR_HCS |
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host->voltages, MMC_RSP_R3);
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err = mci_send_cmd(mci_dev, &cmd, NULL);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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pr_debug("Preparing MMC for operating conditions failed: %d\n", err);
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@ -343,14 +339,14 @@ static int mmc_send_op_cond(struct device_d *mci_dev)
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/**
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* FIXME
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @param ext_csd Buffer for a 512 byte sized extended CSD
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* @return Transaction status (0 on success)
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*
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* Note: Only cards newer than Version 1.1 (Physical Layer Spec) support
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* this command
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*/
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static int mci_send_ext_csd(struct device_d *mci_dev, char *ext_csd)
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static int mci_send_ext_csd(struct mci *mci, char *ext_csd)
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{
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struct mci_cmd cmd;
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struct mci_data data;
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@ -363,18 +359,18 @@ static int mci_send_ext_csd(struct device_d *mci_dev, char *ext_csd)
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data.blocksize = 512;
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data.flags = MMC_DATA_READ;
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return mci_send_cmd(mci_dev, &cmd, &data);
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return mci_send_cmd(mci, &cmd, &data);
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}
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/**
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* FIXME
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @param set FIXME
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* @param index FIXME
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* @param value FIXME
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* @return Transaction status (0 on success)
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*/
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static int mci_switch(struct device_d *mci_dev, unsigned set, unsigned index,
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static int mci_switch(struct mci *mci, unsigned set, unsigned index,
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unsigned value)
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{
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struct mci_cmd cmd;
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@ -385,17 +381,16 @@ static int mci_switch(struct device_d *mci_dev, unsigned set, unsigned index,
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(value << 8),
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MMC_RSP_R1b);
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return mci_send_cmd(mci_dev, &cmd, NULL);
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return mci_send_cmd(mci, &cmd, NULL);
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}
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/**
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* Change transfer frequency for an MMC card
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int mmc_change_freq(struct device_d *mci_dev)
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static int mmc_change_freq(struct mci *mci)
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{
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struct mci *mci = GET_MCI_DATA(mci_dev);
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char *ext_csd = sector_buf;
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char cardtype;
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int err;
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@ -408,7 +403,7 @@ static int mmc_change_freq(struct device_d *mci_dev)
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mci->card_caps |= MMC_MODE_4BIT;
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err = mci_send_ext_csd(mci_dev, ext_csd);
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err = mci_send_ext_csd(mci, ext_csd);
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if (err) {
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pr_debug("Preparing for frequency setup failed: %d\n", err);
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return err;
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@ -416,7 +411,7 @@ static int mmc_change_freq(struct device_d *mci_dev)
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cardtype = ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK;
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err = mci_switch(mci_dev, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
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err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
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if (err) {
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pr_debug("MMC frequency changing failed: %d\n", err);
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@ -424,7 +419,7 @@ static int mmc_change_freq(struct device_d *mci_dev)
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}
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/* Now check to see that it worked */
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err = mci_send_ext_csd(mci_dev, ext_csd);
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err = mci_send_ext_csd(mci, ext_csd);
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if (err) {
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pr_debug("Verifying frequency change failed: %d\n", err);
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@ -446,14 +441,14 @@ static int mmc_change_freq(struct device_d *mci_dev)
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/**
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* FIXME
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @param mode FIXME
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* @param group FIXME
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* @param value FIXME
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* @param resp FIXME
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* @return Transaction status (0 on success)
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*/
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static int sd_switch(struct device_d *mci_dev, unsigned mode, unsigned group,
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static int sd_switch(struct mci *mci, unsigned mode, unsigned group,
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unsigned value, uint8_t *resp)
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{
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struct mci_cmd cmd;
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@ -472,21 +467,20 @@ static int sd_switch(struct device_d *mci_dev, unsigned mode, unsigned group,
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data.blocks = 1;
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data.flags = MMC_DATA_READ;
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return mci_send_cmd(mci_dev, &cmd, &data);
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return mci_send_cmd(mci, &cmd, &data);
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}
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/**
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* Change transfer frequency for an SD card
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @return Transaction status (0 on success)
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*/
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static int sd_change_freq(struct device_d *mci_dev)
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static int sd_change_freq(struct mci *mci)
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{
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struct mci *mci = GET_MCI_DATA(mci_dev);
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struct mci_cmd cmd;
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struct mci_data data;
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#ifdef CONFIG_MCI_SPI
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struct mci_host *host = GET_MCI_PDATA(mci_dev);
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struct mci_host *host = mci->host;
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#endif
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uint32_t *switch_status = sector_buf;
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uint32_t *scr = sector_buf;
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@ -501,7 +495,7 @@ static int sd_change_freq(struct device_d *mci_dev)
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/* Read the SCR to find out if this card supports higher speeds */
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mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, mci->rca << 16, MMC_RSP_R1);
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err = mci_send_cmd(mci_dev, &cmd, NULL);
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err = mci_send_cmd(mci, &cmd, NULL);
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if (err) {
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pr_debug("Query SD card capabilities failed: %d\n", err);
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return err;
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@ -518,7 +512,7 @@ retry_scr:
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data.blocks = 1;
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data.flags = MMC_DATA_READ;
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err = mci_send_cmd(mci_dev, &cmd, &data);
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err = mci_send_cmd(mci, &cmd, &data);
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if (err) {
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pr_debug(" Catch error (%d)", err);
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if (timeout--) {
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@ -553,7 +547,7 @@ retry_scr:
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timeout = 4;
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while (timeout--) {
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err = sd_switch(mci_dev, SD_SWITCH_CHECK, 0, 1,
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err = sd_switch(mci, SD_SWITCH_CHECK, 0, 1,
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(uint8_t*)switch_status);
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if (err) {
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pr_debug("Checking SD transfer switch frequency feature failed: %d\n", err);
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@ -572,7 +566,7 @@ retry_scr:
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if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
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return 0;
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err = sd_switch(mci_dev, SD_SWITCH_SWITCH, 0, 1, (uint8_t*)switch_status);
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err = sd_switch(mci, SD_SWITCH_SWITCH, 0, 1, (uint8_t*)switch_status);
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if (err) {
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pr_debug("Switching SD transfer frequency failed: %d\n", err);
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return err;
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@ -586,11 +580,11 @@ retry_scr:
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/**
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* Setup host's interface bus width and transfer frequency
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* @param mci_dev MCI instance
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* @param mci MCI instance
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*/
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static void mci_set_ios(struct device_d *mci_dev)
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static void mci_set_ios(struct mci *mci)
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{
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struct mci_host *host = GET_MCI_PDATA(mci_dev);
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struct mci_host *host = mci->host;
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struct mci_ios ios;
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ios.bus_width = host->bus_width;
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@ -601,12 +595,12 @@ static void mci_set_ios(struct device_d *mci_dev)
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/**
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* Setup host's interface transfer frequency
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* @param mci_dev MCI instance
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* @param mci MCI instance
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* @param clock New clock in Hz to set
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*/
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static void mci_set_clock(struct device_d *mci_dev, unsigned clock)
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static void mci_set_clock(struct mci *mci, unsigned clock)
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{
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struct mci_host *host = GET_MCI_PDATA(mci_dev);
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struct mci_host *host = mci->host;
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/* check against any given limits */
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if (clock > host->f_max)
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@ -616,30 +610,29 @@ static void mci_set_clock(struct device_d *mci_dev, unsigned clock)
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clock = host->f_min;
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host->clock = clock; /* the new target frequency */
|
||||
mci_set_ios(mci_dev);
|
||||
mci_set_ios(mci);
|
||||
}
|
||||
|
||||
/**
|
||||
* Setup host's interface bus width
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
* @param width New interface bit width (1, 4 or 8)
|
||||
*/
|
||||
static void mci_set_bus_width(struct device_d *mci_dev, unsigned width)
|
||||
static void mci_set_bus_width(struct mci *mci, unsigned width)
|
||||
{
|
||||
struct mci_host *host = GET_MCI_PDATA(mci_dev);
|
||||
struct mci_host *host = mci->host;
|
||||
|
||||
host->bus_width = width; /* the new target bus width */
|
||||
mci_set_ios(mci_dev);
|
||||
mci_set_ios(mci);
|
||||
}
|
||||
|
||||
/**
|
||||
* Extract card's version from its CSD
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
* @return 0 on success
|
||||
*/
|
||||
static void mci_detect_version_from_csd(struct device_d *mci_dev)
|
||||
static void mci_detect_version_from_csd(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
int version;
|
||||
char *vstr;
|
||||
|
||||
|
|
@ -714,13 +707,12 @@ static const unsigned char tran_speed_time[] = {
|
|||
|
||||
/**
|
||||
* Extract max. transfer speed from the CSD
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
*
|
||||
* Encoded in bit 103:96 (103: reserved, 102:99: time, 98:96 unit)
|
||||
*/
|
||||
static void mci_extract_max_tran_speed_from_csd(struct device_d *mci_dev)
|
||||
static void mci_extract_max_tran_speed_from_csd(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
unsigned unit, time;
|
||||
|
||||
unit = tran_speed_unit[(mci->csd[0] & 0x7)];
|
||||
|
|
@ -737,14 +729,12 @@ static void mci_extract_max_tran_speed_from_csd(struct device_d *mci_dev)
|
|||
|
||||
/**
|
||||
* Extract max read and write block length from the CSD
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
*
|
||||
* Encoded in bit 83:80 (read) and 25:22 (write)
|
||||
*/
|
||||
static void mci_extract_block_lengths_from_csd(struct device_d *mci_dev)
|
||||
static void mci_extract_block_lengths_from_csd(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
|
||||
mci->read_bl_len = 1 << ((mci->csd[1] >> 16) & 0xf);
|
||||
|
||||
if (IS_SD(mci))
|
||||
|
|
@ -758,11 +748,10 @@ static void mci_extract_block_lengths_from_csd(struct device_d *mci_dev)
|
|||
|
||||
/**
|
||||
* Extract card's capacitiy from the CSD
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
*/
|
||||
static void mci_extract_card_capacity_from_csd(struct device_d *mci_dev)
|
||||
static void mci_extract_card_capacity_from_csd(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
uint64_t csize, cmult;
|
||||
|
||||
if (mci->high_capacity) {
|
||||
|
|
@ -780,13 +769,12 @@ static void mci_extract_card_capacity_from_csd(struct device_d *mci_dev)
|
|||
|
||||
/**
|
||||
* Scan the given host interfaces and detect connected MMC/SD cards
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
* @return 0 on success, negative value else
|
||||
*/
|
||||
static int mci_startup(struct device_d *mci_dev)
|
||||
static int mci_startup(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
struct mci_host *host = GET_MCI_PDATA(mci_dev);
|
||||
struct mci_host *host = mci->host;
|
||||
struct mci_cmd cmd;
|
||||
int err;
|
||||
|
||||
|
|
@ -794,7 +782,7 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
if (mmc_host_is_spi(host)) { /* enable CRC check for spi */
|
||||
|
||||
mci_setup_cmd(&cmd, MMC_CMD_SPI_CRC_ON_OFF, 1, MMC_RSP_R1);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
|
||||
if (err) {
|
||||
pr_debug("Can't enable CRC check : %d\n", err);
|
||||
|
|
@ -807,7 +795,7 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
|
||||
/* Put the Card in Identify Mode */
|
||||
mci_setup_cmd(&cmd, mmc_host_is_spi(host) ? MMC_CMD_SEND_CID : MMC_CMD_ALL_SEND_CID, 0, MMC_RSP_R2);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Can't bring card into identify mode: %d\n", err);
|
||||
return err;
|
||||
|
|
@ -826,7 +814,7 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
if (!mmc_host_is_spi(host)) { /* cmd not supported in spi */
|
||||
pr_debug("Get/Set relative address\n");
|
||||
mci_setup_cmd(&cmd, SD_CMD_SEND_RELATIVE_ADDR, mci->rca << 16, MMC_RSP_R6);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Get/Set relative address failed: %d\n", err);
|
||||
return err;
|
||||
|
|
@ -839,7 +827,7 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
pr_debug("Get card's specific data\n");
|
||||
/* Get the Card-Specific Data */
|
||||
mci_setup_cmd(&cmd, MMC_CMD_SEND_CSD, mci->rca << 16, MMC_RSP_R2);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Getting card's specific data failed: %d\n", err);
|
||||
return err;
|
||||
|
|
@ -851,10 +839,10 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
pr_debug("Card's specific data is: %08X-%08X-%08X-%08X\n",
|
||||
mci->csd[0], mci->csd[1], mci->csd[2], mci->csd[3]);
|
||||
|
||||
mci_detect_version_from_csd(mci_dev);
|
||||
mci_extract_max_tran_speed_from_csd(mci_dev);
|
||||
mci_extract_block_lengths_from_csd(mci_dev);
|
||||
mci_extract_card_capacity_from_csd(mci_dev);
|
||||
mci_detect_version_from_csd(mci);
|
||||
mci_extract_max_tran_speed_from_csd(mci);
|
||||
mci_extract_block_lengths_from_csd(mci);
|
||||
mci_extract_card_capacity_from_csd(mci);
|
||||
|
||||
/* sanitiy? */
|
||||
if (mci->read_bl_len > SECTOR_SIZE) {
|
||||
|
|
@ -875,7 +863,7 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
pr_debug("Select the card, and put it into Transfer Mode\n");
|
||||
/* Select the card, and put it into Transfer Mode */
|
||||
mci_setup_cmd(&cmd, MMC_CMD_SELECT_CARD, mci->rca << 16, MMC_RSP_R1b);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Putting in transfer mode failed: %d\n", err);
|
||||
return err;
|
||||
|
|
@ -883,9 +871,9 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
}
|
||||
|
||||
if (IS_SD(mci))
|
||||
err = sd_change_freq(mci_dev);
|
||||
err = sd_change_freq(mci);
|
||||
else
|
||||
err = mmc_change_freq(mci_dev);
|
||||
err = mmc_change_freq(mci);
|
||||
|
||||
if (err)
|
||||
return err;
|
||||
|
|
@ -897,7 +885,7 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
if (mci->card_caps & MMC_MODE_4BIT) {
|
||||
pr_debug("Prepare for bus width change\n");
|
||||
mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, mci->rca << 16, MMC_RSP_R1);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Preparing SD for bus width change failed: %d\n", err);
|
||||
return err;
|
||||
|
|
@ -905,60 +893,60 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
|
||||
pr_debug("Set SD bus width to 4 bit\n");
|
||||
mci_setup_cmd(&cmd, SD_CMD_APP_SET_BUS_WIDTH, 2, MMC_RSP_R1);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Changing SD bus width failed: %d\n", err);
|
||||
/* TODO continue with 1 bit? */
|
||||
return err;
|
||||
}
|
||||
mci_set_bus_width(mci_dev, MMC_BUS_WIDTH_4);
|
||||
mci_set_bus_width(mci, MMC_BUS_WIDTH_4);
|
||||
}
|
||||
/* if possible, speed up the transfer */
|
||||
if (mci->card_caps & MMC_MODE_HS)
|
||||
mci_set_clock(mci_dev, 50000000);
|
||||
mci_set_clock(mci, 50000000);
|
||||
else
|
||||
mci_set_clock(mci_dev, 25000000);
|
||||
mci_set_clock(mci, 25000000);
|
||||
} else {
|
||||
if (mci->card_caps & MMC_MODE_4BIT) {
|
||||
pr_debug("Set MMC bus width to 4 bit\n");
|
||||
/* Set the card to use 4 bit*/
|
||||
err = mci_switch(mci_dev, EXT_CSD_CMD_SET_NORMAL,
|
||||
err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL,
|
||||
EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4);
|
||||
if (err) {
|
||||
pr_debug("Changing MMC bus width failed: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
mci_set_bus_width(mci_dev, MMC_BUS_WIDTH_4);
|
||||
mci_set_bus_width(mci, MMC_BUS_WIDTH_4);
|
||||
} else if (mci->card_caps & MMC_MODE_8BIT) {
|
||||
pr_debug("Set MMC bus width to 8 bit\n");
|
||||
/* Set the card to use 8 bit*/
|
||||
err = mci_switch(mci_dev, EXT_CSD_CMD_SET_NORMAL,
|
||||
err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL,
|
||||
EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_8);
|
||||
if (err) {
|
||||
pr_debug("Changing MMC bus width failed: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
mci_set_bus_width(mci_dev, MMC_BUS_WIDTH_8);
|
||||
mci_set_bus_width(mci, MMC_BUS_WIDTH_8);
|
||||
}
|
||||
/* if possible, speed up the transfer */
|
||||
if (mci->card_caps & MMC_MODE_HS) {
|
||||
if (mci->card_caps & MMC_MODE_HS_52MHz)
|
||||
mci_set_clock(mci_dev, 52000000);
|
||||
mci_set_clock(mci, 52000000);
|
||||
else
|
||||
mci_set_clock(mci_dev, 26000000);
|
||||
mci_set_clock(mci, 26000000);
|
||||
} else
|
||||
mci_set_clock(mci_dev, 20000000);
|
||||
mci_set_clock(mci, 20000000);
|
||||
}
|
||||
|
||||
/* we setup the blocklength only one times for all accesses to this media */
|
||||
err = mci_set_blocklen(mci_dev, mci->read_bl_len);
|
||||
err = mci_set_blocklen(mci, mci->read_bl_len);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/**
|
||||
* Detect a SD 2.0 card and enable its features
|
||||
* @param mci_dev MCI instance
|
||||
* @param mci MCI instance
|
||||
* @return Transfer status (0 on success)
|
||||
*
|
||||
* By issuing the CMD8 command SDHC/SDXC cards realize that the host supports
|
||||
|
|
@ -967,10 +955,9 @@ static int mci_startup(struct device_d *mci_dev)
|
|||
*
|
||||
* If this CMD8 command will end with a timeout it is a MultiMediaCard only.
|
||||
*/
|
||||
static int sd_send_if_cond(struct device_d *mci_dev)
|
||||
static int sd_send_if_cond(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
struct mci_host *host = GET_MCI_PDATA(mci_dev);
|
||||
struct mci_host *host = mci->host;
|
||||
struct mci_cmd cmd;
|
||||
int err;
|
||||
|
||||
|
|
@ -978,7 +965,7 @@ static int sd_send_if_cond(struct device_d *mci_dev)
|
|||
/* We set the bit if the host supports voltages between 2.7 and 3.6 V */
|
||||
((host->voltages & 0x00ff8000) != 0) << 8 | 0xaa,
|
||||
MMC_RSP_R7);
|
||||
err = mci_send_cmd(mci_dev, &cmd, NULL);
|
||||
err = mci_send_cmd(mci, &cmd, NULL);
|
||||
if (err) {
|
||||
pr_debug("Query interface conditions failed: %d\n", err);
|
||||
return err;
|
||||
|
|
@ -1010,8 +997,7 @@ static int sd_send_if_cond(struct device_d *mci_dev)
|
|||
static int __maybe_unused mci_sd_write(struct block_device *blk,
|
||||
const void *buffer, int block, int num_blocks)
|
||||
{
|
||||
struct device_d *mci_dev = blk->dev;
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
struct mci *mci = container_of(blk, struct mci, blk);
|
||||
int rc;
|
||||
|
||||
pr_debug("%s: Write %d block(s), starting at %d\n",
|
||||
|
|
@ -1029,7 +1015,7 @@ static int __maybe_unused mci_sd_write(struct block_device *blk,
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = mci_block_write(mci_dev, buffer, block, num_blocks);
|
||||
rc = mci_block_write(mci, buffer, block, num_blocks);
|
||||
if (rc != 0) {
|
||||
pr_debug("Writing block %d failed with %d\n", block, rc);
|
||||
return rc;
|
||||
|
|
@ -1051,8 +1037,7 @@ static int __maybe_unused mci_sd_write(struct block_device *blk,
|
|||
static int mci_sd_read(struct block_device *blk, void *buffer, int block,
|
||||
int num_blocks)
|
||||
{
|
||||
struct device_d *mci_dev = blk->dev;
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
struct mci *mci = container_of(blk, struct mci, blk);
|
||||
int rc;
|
||||
|
||||
pr_debug("%s: Read %d block(s), starting at %d\n",
|
||||
|
|
@ -1069,7 +1054,7 @@ static int mci_sd_read(struct block_device *blk, void *buffer, int block,
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = mci_read_block(mci_dev, buffer, block, num_blocks);
|
||||
rc = mci_read_block(mci, buffer, block, num_blocks);
|
||||
if (rc != 0) {
|
||||
pr_debug("Reading block %d failed with %d\n", block, rc);
|
||||
return rc;
|
||||
|
|
@ -1150,11 +1135,11 @@ static unsigned extract_mtd_year(struct mci *mci)
|
|||
|
||||
/**
|
||||
* Output some valuable information when the user runs 'devinfo' on an MCI device
|
||||
* @param mci_dev MCI device instance
|
||||
* @param mci MCI device instance
|
||||
*/
|
||||
static void mci_info(struct device_d *mci_dev)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
struct mci *mci = mci_dev->priv;
|
||||
|
||||
if (mci->ready_for_use == 0) {
|
||||
printf(" No information available:\n MCI card not probed yet\n");
|
||||
|
|
@ -1193,17 +1178,15 @@ static void mci_info(struct device_d *mci_dev)
|
|||
|
||||
/**
|
||||
* Check if the MCI card is already probed
|
||||
* @param mci_dev MCI device instance
|
||||
* @param mci MCI device instance
|
||||
* @return 0 when not probed yet, -EPERM if already probed
|
||||
*
|
||||
* @a barebox cannot really cope with hot plugging. So, probing an attached
|
||||
* MCI card is a one time only job. If its already done, there is no way to
|
||||
* return.
|
||||
*/
|
||||
static int mci_check_if_already_initialized(struct device_d *mci_dev)
|
||||
static int mci_check_if_already_initialized(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
|
||||
if (mci->ready_for_use != 0)
|
||||
return -EPERM;
|
||||
|
||||
|
|
@ -1231,45 +1214,44 @@ static struct block_device_ops mci_ops = {
|
|||
|
||||
/**
|
||||
* Probe an MCI card at the given host interface
|
||||
* @param mci_dev MCI device instance
|
||||
* @param mci MCI device instance
|
||||
* @return 0 on success, negative values else
|
||||
*/
|
||||
static int mci_card_probe(struct device_d *mci_dev)
|
||||
static int mci_card_probe(struct mci *mci)
|
||||
{
|
||||
struct mci *mci = GET_MCI_DATA(mci_dev);
|
||||
struct mci_host *host = GET_MCI_PDATA(mci_dev);
|
||||
struct mci_host *host = mci->host;
|
||||
int rc;
|
||||
|
||||
/* start with a host interface reset */
|
||||
rc = (host->init)(host, mci_dev);
|
||||
rc = (host->init)(host, mci->mci_dev);
|
||||
if (rc) {
|
||||
pr_err("Cannot reset the SD/MMC interface\n");
|
||||
return rc;
|
||||
}
|
||||
|
||||
mci_set_bus_width(mci_dev, MMC_BUS_WIDTH_1);
|
||||
mci_set_clock(mci_dev, 1); /* set the lowest available clock */
|
||||
mci_set_bus_width(mci, MMC_BUS_WIDTH_1);
|
||||
mci_set_clock(mci, 1); /* set the lowest available clock */
|
||||
|
||||
/* reset the card */
|
||||
rc = mci_go_idle(mci_dev);
|
||||
rc = mci_go_idle(mci);
|
||||
if (rc) {
|
||||
pr_warning("Cannot reset the SD/MMC card\n");
|
||||
goto on_error;
|
||||
}
|
||||
|
||||
/* Check if this card can handle the "SD Card Physical Layer Specification 2.0" */
|
||||
rc = sd_send_if_cond(mci_dev);
|
||||
rc = sd_send_op_cond(mci_dev);
|
||||
rc = sd_send_if_cond(mci);
|
||||
rc = sd_send_op_cond(mci);
|
||||
if (rc && rc == -ETIMEDOUT) {
|
||||
/* If the command timed out, we check for an MMC card */
|
||||
pr_debug("Card seems to be a MultiMediaCard\n");
|
||||
rc = mmc_send_op_cond(mci_dev);
|
||||
rc = mmc_send_op_cond(mci);
|
||||
}
|
||||
|
||||
if (rc)
|
||||
goto on_error;
|
||||
|
||||
rc = mci_startup(mci_dev);
|
||||
rc = mci_startup(mci);
|
||||
if (rc) {
|
||||
pr_debug("Card's startup fails with %d\n", rc);
|
||||
goto on_error;
|
||||
|
|
@ -1282,7 +1264,7 @@ static int mci_card_probe(struct device_d *mci_dev)
|
|||
* An MMC/SD card acts like an ordinary disk.
|
||||
* So, re-use the disk driver to gain access to this media
|
||||
*/
|
||||
mci->blk.dev = mci_dev;
|
||||
mci->blk.dev = mci->mci_dev;
|
||||
mci->blk.ops = &mci_ops;
|
||||
|
||||
rc = cdev_find_free_index("disk");
|
||||
|
|
@ -1295,14 +1277,14 @@ static int mci_card_probe(struct device_d *mci_dev)
|
|||
|
||||
rc = blockdevice_register(&mci->blk);
|
||||
if (rc != 0) {
|
||||
dev_err(mci_dev, "Failed to register MCI/SD blockdevice\n");
|
||||
dev_err(mci->mci_dev, "Failed to register MCI/SD blockdevice\n");
|
||||
goto on_error;
|
||||
}
|
||||
|
||||
/* create partitions on demand */
|
||||
rc = parse_partition_table(&mci->blk);
|
||||
if (rc != 0) {
|
||||
dev_warn(mci_dev, "No partition table found\n");
|
||||
dev_warn(mci->mci_dev, "No partition table found\n");
|
||||
rc = 0; /* it's not a failure */
|
||||
}
|
||||
|
||||
|
|
@ -1311,7 +1293,7 @@ static int mci_card_probe(struct device_d *mci_dev)
|
|||
on_error:
|
||||
if (rc != 0) {
|
||||
host->clock = 0; /* disable the MCI clock */
|
||||
mci_set_ios(mci_dev);
|
||||
mci_set_ios(mci);
|
||||
}
|
||||
|
||||
return rc;
|
||||
|
|
@ -1327,15 +1309,16 @@ on_error:
|
|||
static int mci_set_probe(struct device_d *mci_dev, struct param_d *param,
|
||||
const char *val)
|
||||
{
|
||||
struct mci *mci = mci_dev->priv;
|
||||
int rc, probe;
|
||||
|
||||
rc = mci_check_if_already_initialized(mci_dev);
|
||||
rc = mci_check_if_already_initialized(mci);
|
||||
if (rc != 0)
|
||||
return rc;
|
||||
|
||||
probe = simple_strtoul(val, NULL, 0);
|
||||
if (probe != 0) {
|
||||
rc = mci_card_probe(mci_dev);
|
||||
rc = mci_card_probe(mci);
|
||||
if (rc != 0)
|
||||
return rc;
|
||||
}
|
||||
|
|
@ -1377,10 +1360,12 @@ static int mci_probe(struct device_d *mci_dev)
|
|||
|
||||
mci = xzalloc(sizeof(struct mci));
|
||||
mci_dev->priv = mci;
|
||||
mci->mci_dev = mci_dev;
|
||||
mci->host = mci_dev->platform_data;
|
||||
|
||||
#ifdef CONFIG_MCI_STARTUP
|
||||
/* if enabled, probe the attached card immediately */
|
||||
rc = mci_card_probe(mci_dev);
|
||||
rc = mci_card_probe(mci);
|
||||
if (rc) {
|
||||
/*
|
||||
* If it fails, add the 'probe' parameter to give the user
|
||||
|
|
@ -1439,7 +1424,7 @@ int mci_register(struct mci_host *host)
|
|||
|
||||
mci_dev->id = -1;
|
||||
strcpy(mci_dev->name, mci_driver.name);
|
||||
mci_dev->platform_data = (void*)host;
|
||||
mci_dev->platform_data = host;
|
||||
dev_add_child(host->hw_dev, mci_dev);
|
||||
|
||||
return register_device(mci_dev);
|
||||
|
|
|
|||
|
|
@ -44,6 +44,9 @@
|
|||
#include <mach/s3c-generic.h>
|
||||
#include <mach/s3c-iomap.h>
|
||||
|
||||
#define GET_HOST_DATA(x) (x->priv)
|
||||
#define GET_MCI_PDATA(x) (x->platform_data)
|
||||
|
||||
#define SDICON 0x0
|
||||
# define SDICON_SDRESET (1 << 8)
|
||||
# define SDICON_MMCCLOCK (1 << 5) /* this is a clock type SD or MMC style WTF? */
|
||||
|
|
|
|||
|
|
@ -267,7 +267,9 @@ struct mci_host {
|
|||
|
||||
/** MMC/SD and interface instance information */
|
||||
struct mci {
|
||||
struct mci_host *host; /**< the host for this card */
|
||||
struct block_device blk; /**< the blockdevice for the card */
|
||||
struct device_d *mci_dev; /**< the device for our disk (mcix) */
|
||||
unsigned version;
|
||||
/** != 0 when a high capacity card is connected (OCR -> OCR_HCS) */
|
||||
int high_capacity;
|
||||
|
|
@ -288,9 +290,4 @@ struct mci {
|
|||
|
||||
int mci_register(struct mci_host*);
|
||||
|
||||
#define GET_HOST_DATA(x) (x->priv)
|
||||
#define GET_HOST_PDATA(x) (x->platform_data)
|
||||
#define GET_MCI_DATA(x) (x->priv)
|
||||
#define GET_MCI_PDATA(x) (x->platform_data)
|
||||
|
||||
#endif /* _MCI_H_ */
|
||||
|
|
|
|||
Loading…
Reference in New Issue