Hi Ulf,
On Tue, Dec 23, 2014 at 9:32 PM, Ulf Hansson <ulf.hans...@linaro.org> wrote:
> Instead of having a local hack taking care of sending the tuning
> command and as well to verify the response pattern, let's convert to
> the common mmc_send_tuning() API.
>
> This change affects the Exynos variant, since it's the only one which
> support the dw_mmc's ->execute_tuning() callback.
>
> Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
> ---
>
yes, this works fine now, with the other patch which add STOP command,
and I don't need to modify DT timing values. So,
Reviewed-by: Alim Akhtar <alim.akh...@samsung.com>
Tested on exynos5800-peach-pi board, so
Tested-by: Alim Akhtar <alim.akh...@samsung.com>
> Changes in v3:
> Fix return value from dw_mci_exynos_execute_tuning() according to
> comment from Jaehoon Chung.
>
> ---
> drivers/mmc/host/dw_mmc-exynos.c | 48
> +++-------------------------------------
> drivers/mmc/host/dw_mmc.c | 22 +-----------------
> drivers/mmc/host/dw_mmc.h | 8 +------
> 3 files changed, 5 insertions(+), 73 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc-exynos.c
> b/drivers/mmc/host/dw_mmc-exynos.c
> index 74eb081..12a5eaa 100644
> --- a/drivers/mmc/host/dw_mmc-exynos.c
> +++ b/drivers/mmc/host/dw_mmc-exynos.c
> @@ -340,64 +340,23 @@ out:
> return loc;
> }
>
> -static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode,
> - struct dw_mci_tuning_data
> *tuning_data)
> +static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot)
> {
> struct dw_mci *host = slot->host;
> struct mmc_host *mmc = slot->mmc;
> - const u8 *blk_pattern = tuning_data->blk_pattern;
> - u8 *blk_test;
> - unsigned int blksz = tuning_data->blksz;
> u8 start_smpl, smpl, candiates = 0;
> s8 found = -1;
> int ret = 0;
>
> - blk_test = kmalloc(blksz, GFP_KERNEL);
> - if (!blk_test)
> - return -ENOMEM;
> -
> start_smpl = dw_mci_exynos_get_clksmpl(host);
>
> do {
> - struct mmc_request mrq = {NULL};
> - struct mmc_command cmd = {0};
> - struct mmc_command stop = {0};
> - struct mmc_data data = {0};
> - struct scatterlist sg;
> -
> - cmd.opcode = opcode;
> - cmd.arg = 0;
> - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
> -
> - stop.opcode = MMC_STOP_TRANSMISSION;
> - stop.arg = 0;
> - stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
> -
> - data.blksz = blksz;
> - data.blocks = 1;
> - data.flags = MMC_DATA_READ;
> - data.sg = &sg;
> - data.sg_len = 1;
> -
> - sg_init_one(&sg, blk_test, blksz);
> - mrq.cmd = &cmd;
> - mrq.stop = &stop;
> - mrq.data = &data;
> - host->mrq = &mrq;
> -
> mci_writel(host, TMOUT, ~0);
> smpl = dw_mci_exynos_move_next_clksmpl(host);
>
> - mmc_wait_for_req(mmc, &mrq);
> + if (!mmc_send_tuning(mmc))
> + candiates |= (1 << smpl);
>
> - if (!cmd.error && !data.error) {
> - if (!memcmp(blk_pattern, blk_test, blksz))
> - candiates |= (1 << smpl);
> - } else {
> - dev_dbg(host->dev,
> - "Tuning error: cmd.error:%d, data.error:%d\n",
> - cmd.error, data.error);
> - }
> } while (start_smpl != smpl);
>
> found = dw_mci_exynos_get_best_clksmpl(candiates);
> @@ -406,7 +365,6 @@ static int dw_mci_exynos_execute_tuning(struct
> dw_mci_slot *slot, u32 opcode,
> else
> ret = -EIO;
>
> - kfree(blk_test);
> return ret;
> }
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 6e4d864..88dc50f 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -1312,30 +1312,10 @@ static int dw_mci_execute_tuning(struct mmc_host
> *mmc, u32 opcode)
> struct dw_mci_slot *slot = mmc_priv(mmc);
> struct dw_mci *host = slot->host;
> const struct dw_mci_drv_data *drv_data = host->drv_data;
> - struct dw_mci_tuning_data tuning_data;
> int err = -ENOSYS;
>
> - if (opcode == MMC_SEND_TUNING_BLOCK_HS200) {
> - if (mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
> - tuning_data.blk_pattern = tuning_blk_pattern_8bit;
> - tuning_data.blksz = sizeof(tuning_blk_pattern_8bit);
> - } else if (mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
> - tuning_data.blk_pattern = tuning_blk_pattern_4bit;
> - tuning_data.blksz = sizeof(tuning_blk_pattern_4bit);
> - } else {
> - return -EINVAL;
> - }
> - } else if (opcode == MMC_SEND_TUNING_BLOCK) {
> - tuning_data.blk_pattern = tuning_blk_pattern_4bit;
> - tuning_data.blksz = sizeof(tuning_blk_pattern_4bit);
> - } else {
> - dev_err(host->dev,
> - "Undefined command(%d) for tuning\n", opcode);
> - return -EINVAL;
> - }
> -
> if (drv_data && drv_data->execute_tuning)
> - err = drv_data->execute_tuning(slot, opcode, &tuning_data);
> + err = drv_data->execute_tuning(slot);
> return err;
> }
>
> diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
> index d27d4c0..18c4afe 100644
> --- a/drivers/mmc/host/dw_mmc.h
> +++ b/drivers/mmc/host/dw_mmc.h
> @@ -249,11 +249,6 @@ struct dw_mci_slot {
> int sdio_id;
> };
>
> -struct dw_mci_tuning_data {
> - const u8 *blk_pattern;
> - unsigned int blksz;
> -};
> -
> /**
> * dw_mci driver data - dw-mshc implementation specific driver data.
> * @caps: mmc subsystem specified capabilities of the controller(s).
> @@ -275,7 +270,6 @@ struct dw_mci_drv_data {
> void (*prepare_command)(struct dw_mci *host, u32 *cmdr);
> void (*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
> int (*parse_dt)(struct dw_mci *host);
> - int (*execute_tuning)(struct dw_mci_slot *slot, u32
> opcode,
> - struct dw_mci_tuning_data
> *tuning_data);
> + int (*execute_tuning)(struct dw_mci_slot *slot);
> };
> #endif /* _DW_MMC_H_ */
> --
> 1.9.1
>
> --
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--
Regards,
Alim
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