On 12/05/2014 01:59 PM, Ulf Hansson 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 instead.
>
> Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Hi Ulf,
Tuning works for eMMC on apq8074-dragonboard and ifc6540 boards, so:
Tested-by: Georgi Djakov <gdja...@mm-sol.com>
Acked-by: Georgi Djakov <gdja...@mm-sol.com>
Thanks,
Georgi
> Changes in v2:
> Rebased, to get latest version of the mmc_send_tuning() API.
>
> ---
> drivers/mmc/host/sdhci-msm.c | 50
> +++++++-------------------------------------
> 1 file changed, 7 insertions(+), 43 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 3080438..3d32ce8 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -339,9 +339,7 @@ static int msm_init_cm_dll(struct sdhci_host *host)
> static int sdhci_msm_execute_tuning(struct sdhci_host *host, u32 opcode)
> {
> int tuning_seq_cnt = 3;
> - u8 phase, *data_buf, tuned_phases[16], tuned_phase_cnt = 0;
> - const u8 *tuning_block_pattern = tuning_blk_pattern_4bit;
> - int size = sizeof(tuning_blk_pattern_4bit);
> + u8 phase, tuned_phases[16], tuned_phase_cnt = 0;
> int rc;
> struct mmc_host *mmc = host->mmc;
> struct mmc_ios ios = host->mmc->ios;
> @@ -355,53 +353,21 @@ static int sdhci_msm_execute_tuning(struct sdhci_host
> *host, u32 opcode)
> (ios.timing == MMC_TIMING_UHS_SDR104)))
> return 0;
>
> - if ((opcode == MMC_SEND_TUNING_BLOCK_HS200) &&
> - (mmc->ios.bus_width == MMC_BUS_WIDTH_8)) {
> - tuning_block_pattern = tuning_blk_pattern_8bit;
> - size = sizeof(tuning_blk_pattern_8bit);
> - }
> -
> - data_buf = kmalloc(size, GFP_KERNEL);
> - if (!data_buf)
> - return -ENOMEM;
> -
> retry:
> /* First of all reset the tuning block */
> rc = msm_init_cm_dll(host);
> if (rc)
> - goto out;
> + return rc;
>
> phase = 0;
> do {
> - struct mmc_command cmd = { 0 };
> - struct mmc_data data = { 0 };
> - struct mmc_request mrq = {
> - .cmd = &cmd,
> - .data = &data
> - };
> - struct scatterlist sg;
> -
> /* Set the phase in delay line hw block */
> rc = msm_config_cm_dll_phase(host, phase);
> if (rc)
> - goto out;
> + return rc;
>
> - cmd.opcode = opcode;
> - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
> -
> - data.blksz = size;
> - data.blocks = 1;
> - data.flags = MMC_DATA_READ;
> - data.timeout_ns = NSEC_PER_SEC; /* 1 second */
> -
> - data.sg = &sg;
> - data.sg_len = 1;
> - sg_init_one(&sg, data_buf, size);
> - memset(data_buf, 0, size);
> - mmc_wait_for_req(mmc, &mrq);
> -
> - if (!cmd.error && !data.error &&
> - !memcmp(data_buf, tuning_block_pattern, size)) {
> + rc = mmc_send_tuning(mmc);
> + if (!rc) {
> /* Tuning is successful at this tuning point */
> tuned_phases[tuned_phase_cnt++] = phase;
> dev_dbg(mmc_dev(mmc), "%s: Found good phase = %d\n",
> @@ -413,7 +379,7 @@ retry:
> rc = msm_find_most_appropriate_phase(host, tuned_phases,
> tuned_phase_cnt);
> if (rc < 0)
> - goto out;
> + return rc;
> else
> phase = rc;
>
> @@ -423,7 +389,7 @@ retry:
> */
> rc = msm_config_cm_dll_phase(host, phase);
> if (rc)
> - goto out;
> + return rc;
> dev_dbg(mmc_dev(mmc), "%s: Setting the tuning phase to %d\n",
> mmc_hostname(mmc), phase);
> } else {
> @@ -435,8 +401,6 @@ retry:
> rc = -EIO;
> }
>
> -out:
> - kfree(data_buf);
> return rc;
> }
>
>
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