On 5 December 2014 at 12:11, Dong Aisheng <[email protected]> wrote:
> On Mon, Dec 01, 2014 at 05:02:07PM +0100, Ulf Hansson wrote:
>> Instead of having a local function taking care of sending the tuning
>> command, let's use the common mmc_send_tuning() API provided by the mmc
>> core. In this way the request will be handled as any other request by
>> sdhci core.
>>
>> As an effect of this change, the pm_runtime_get_sync() call at
>> esdhc_prepare_tuning() isn't needed any more.
>>
>> This patch will also introduce another change in behavior, since before
>> the response pattern to the tuning command wasn't verified by
>> sdhci-esdhc-imx. The mmc_send_tuning() does that.
>>
>> Signed-off-by: Ulf Hansson <[email protected]>
>
> After applying your mmc_send_tuning() fix patch and it's usage update,
> i tested it worked well on a imx6dl sabreauto board.
>
> So you can add my tag when update the patch.
> Tested-by: Dong Aisheng <[email protected]>
> Acked-by: Dong Aisheng <[email protected]>
Thanks Dong for helping out! Much appreciated!
Kind regards
Uffe
>
> Regards
> Dong Aisheng
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c
> b/drivers/mmc/host/sdhci-esdhc-imx.c
> index a33d64c..12711ab 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -717,7 +717,7 @@ static int esdhc_executing_tuning(struct sdhci_host
> *host, u32 opcode)
> min = ESDHC_TUNE_CTRL_MIN;
> while (min < ESDHC_TUNE_CTRL_MAX) {
> esdhc_prepare_tuning(host, min);
> - if (!mmc_send_tuning(host->mmc->card))
> + if (!mmc_send_tuning(host->mmc))
> break;
> min += ESDHC_TUNE_CTRL_STEP;
> }
> @@ -726,7 +726,7 @@ static int esdhc_executing_tuning(struct sdhci_host
> *host, u32 opcode)
> max = min + ESDHC_TUNE_CTRL_STEP;
> while (max < ESDHC_TUNE_CTRL_MAX) {
> esdhc_prepare_tuning(host, max);
> - if (mmc_send_tuning(host->mmc->card)) {
> + if (mmc_send_tuning(host->mmc)) {
> max -= ESDHC_TUNE_CTRL_STEP;
> break;
> }
> @@ -736,7 +736,7 @@ static int esdhc_executing_tuning(struct sdhci_host
> *host, u32 opcode)
> /* use average delay to get the best timing */
> avg = (min + max) / 2;
> esdhc_prepare_tuning(host, avg);
> - ret = mmc_send_tuning(host->mmc->card);
> + ret = mmc_send_tuning(host->mmc);
> esdhc_post_tuning(host);
>
> dev_dbg(mmc_dev(host->mmc), "tunning %s at 0x%x ret %d\n",
>
>> ---
>> drivers/mmc/host/sdhci-esdhc-imx.c | 68
>> ++------------------------------------
>> 1 file changed, 3 insertions(+), 65 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c
>> b/drivers/mmc/host/sdhci-esdhc-imx.c
>> index 0135f00..a33d64c 100644
>> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
>> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
>> @@ -65,8 +65,6 @@
>> /* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
>> #define ESDHC_TUNING_START_TAP 0x1
>>
>> -#define ESDHC_TUNING_BLOCK_PATTERN_LEN 64
>> -
>> /* pinctrl state */
>> #define ESDHC_PINCTRL_STATE_100MHZ "state_100mhz"
>> #define ESDHC_PINCTRL_STATE_200MHZ "state_200mhz"
>> @@ -692,8 +690,6 @@ static void esdhc_prepare_tuning(struct sdhci_host
>> *host, u32 val)
>> /* FIXME: delay a bit for card to be ready for next tuning due to
>> errors */
>> mdelay(1);
>>
>> - /* This is balanced by the runtime put in sdhci_tasklet_finish */
>> - pm_runtime_get_sync(host->mmc->parent);
>> reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
>> reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
>> ESDHC_MIX_CTRL_FBCLK_SEL;
>> @@ -704,54 +700,6 @@ static void esdhc_prepare_tuning(struct sdhci_host
>> *host, u32 val)
>> val, readl(host->ioaddr + ESDHC_TUNE_CTRL_STATUS));
>> }
>>
>> -static void esdhc_request_done(struct mmc_request *mrq)
>> -{
>> - complete(&mrq->completion);
>> -}
>> -
>> -static int esdhc_send_tuning_cmd(struct sdhci_host *host, u32 opcode,
>> - struct scatterlist *sg)
>> -{
>> - struct mmc_command cmd = {0};
>> - struct mmc_request mrq = {NULL};
>> - struct mmc_data data = {0};
>> -
>> - cmd.opcode = opcode;
>> - cmd.arg = 0;
>> - cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
>> -
>> - data.blksz = ESDHC_TUNING_BLOCK_PATTERN_LEN;
>> - data.blocks = 1;
>> - data.flags = MMC_DATA_READ;
>> - data.sg = sg;
>> - data.sg_len = 1;
>> -
>> - mrq.cmd = &cmd;
>> - mrq.cmd->mrq = &mrq;
>> - mrq.data = &data;
>> - mrq.data->mrq = &mrq;
>> - mrq.cmd->data = mrq.data;
>> -
>> - mrq.done = esdhc_request_done;
>> - init_completion(&(mrq.completion));
>> -
>> - spin_lock_irq(&host->lock);
>> - host->mrq = &mrq;
>> -
>> - sdhci_send_command(host, mrq.cmd);
>> -
>> - spin_unlock_irq(&host->lock);
>> -
>> - wait_for_completion(&mrq.completion);
>> -
>> - if (cmd.error)
>> - return cmd.error;
>> - if (data.error)
>> - return data.error;
>> -
>> - return 0;
>> -}
>> -
>> static void esdhc_post_tuning(struct sdhci_host *host)
>> {
>> u32 reg;
>> @@ -763,21 +711,13 @@ static void esdhc_post_tuning(struct sdhci_host *host)
>>
>> static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
>> {
>> - struct scatterlist sg;
>> - char *tuning_pattern;
>> int min, max, avg, ret;
>>
>> - tuning_pattern = kmalloc(ESDHC_TUNING_BLOCK_PATTERN_LEN, GFP_KERNEL);
>> - if (!tuning_pattern)
>> - return -ENOMEM;
>> -
>> - sg_init_one(&sg, tuning_pattern, ESDHC_TUNING_BLOCK_PATTERN_LEN);
>> -
>> /* find the mininum delay first which can pass tuning */
>> min = ESDHC_TUNE_CTRL_MIN;
>> while (min < ESDHC_TUNE_CTRL_MAX) {
>> esdhc_prepare_tuning(host, min);
>> - if (!esdhc_send_tuning_cmd(host, opcode, &sg))
>> + if (!mmc_send_tuning(host->mmc->card))
>> break;
>> min += ESDHC_TUNE_CTRL_STEP;
>> }
>> @@ -786,7 +726,7 @@ static int esdhc_executing_tuning(struct sdhci_host
>> *host, u32 opcode)
>> max = min + ESDHC_TUNE_CTRL_STEP;
>> while (max < ESDHC_TUNE_CTRL_MAX) {
>> esdhc_prepare_tuning(host, max);
>> - if (esdhc_send_tuning_cmd(host, opcode, &sg)) {
>> + if (mmc_send_tuning(host->mmc->card)) {
>> max -= ESDHC_TUNE_CTRL_STEP;
>> break;
>> }
>> @@ -796,11 +736,9 @@ static int esdhc_executing_tuning(struct sdhci_host
>> *host, u32 opcode)
>> /* use average delay to get the best timing */
>> avg = (min + max) / 2;
>> esdhc_prepare_tuning(host, avg);
>> - ret = esdhc_send_tuning_cmd(host, opcode, &sg);
>> + ret = mmc_send_tuning(host->mmc->card);
>> esdhc_post_tuning(host);
>>
>> - kfree(tuning_pattern);
>> -
>> dev_dbg(mmc_dev(host->mmc), "tunning %s at 0x%x ret %d\n",
>> ret ? "failed" : "passed", avg, ret);
>>
>> --
>> 1.9.1
>>
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