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mmc: sdhci-esdhc-imx: move all non dt probe code into one function
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This is an incremental fix of commit
e62bd351b("mmc: sdhci-esdhc-imx: Do not break platform data boards").

After commit 8d86e4f ("mmc: sdhci-esdhc-imx: Call mmc_of_parse()"),
we do not need to run the check of boarddata->wp_type/cd_type/max_bus_width
again for dt platform since those are already handled by mmc_of_parse().

Current code only exclude the checking of wp_type for dt platform which
does not make sense.

This patch moves all non dt probe code into one function.
Besides, since we only support SD3.0/eMMC HS200 for dt platform, the
support_vsel checking and ultra high speed pinctrl state are also merged
into sdhci_esdhc_imx_probe_dt.

Then we have two separately probe function for dt and non dt type.
This can make the driver probe more clearly.

Signed-off-by: Dong Aisheng <aisheng.dong@freescale.com>
Reviewed-by: Johan Derycke <johan.derycke@barco.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Dong Aisheng authored and Ulf Hansson committed Jul 24, 2015
1 parent 4800e87 commit 91fa425
Showing 1 changed file with 94 additions and 85 deletions.
179 changes: 94 additions & 85 deletions drivers/mmc/host/sdhci-esdhc-imx.c
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Original file line number Diff line number Diff line change
Expand Up @@ -878,14 +878,12 @@ static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
static int
sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
struct sdhci_host *host,
struct esdhc_platform_data *boarddata)
struct pltfm_imx_data *imx_data)
{
struct device_node *np = pdev->dev.of_node;
struct esdhc_platform_data *boarddata = &imx_data->boarddata;
int ret;

if (!np)
return -ENODEV;

if (of_get_property(np, "non-removable", NULL))
boarddata->cd_type = ESDHC_CD_PERMANENT;

Expand Down Expand Up @@ -917,6 +915,26 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,

mmc_of_parse_voltage(np, &host->ocr_mask);

/* sdr50 and sdr104 needs work on 1.8v signal voltage */
if ((boarddata->support_vsel) && esdhc_is_usdhc(imx_data) &&
!IS_ERR(imx_data->pins_default)) {
imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
ESDHC_PINCTRL_STATE_100MHZ);
imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,
ESDHC_PINCTRL_STATE_200MHZ);
if (IS_ERR(imx_data->pins_100mhz) ||
IS_ERR(imx_data->pins_200mhz)) {
dev_warn(mmc_dev(host->mmc),
"could not get ultra high speed state, work on normal mode\n");
/*
* fall back to not support uhs by specify no 1.8v quirk
*/
host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
}
} else {
host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
}

/* call to generic mmc_of_parse to support additional capabilities */
ret = mmc_of_parse(host->mmc);
if (ret)
Expand All @@ -931,22 +949,85 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
static inline int
sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
struct sdhci_host *host,
struct esdhc_platform_data *boarddata)
struct pltfm_imx_data *imx_data)
{
return -ENODEV;
}
#endif

static int sdhci_esdhc_imx_probe_nondt(struct platform_device *pdev,
struct sdhci_host *host,
struct pltfm_imx_data *imx_data)
{
struct esdhc_platform_data *boarddata = &imx_data->boarddata;
int err;

if (!host->mmc->parent->platform_data) {
dev_err(mmc_dev(host->mmc), "no board data!\n");
return -EINVAL;
}

imx_data->boarddata = *((struct esdhc_platform_data *)
host->mmc->parent->platform_data);
/* write_protect */
if (boarddata->wp_type == ESDHC_WP_GPIO) {
err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio);
if (err) {
dev_err(mmc_dev(host->mmc),
"failed to request write-protect gpio!\n");
return err;
}
host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
}

/* card_detect */
switch (boarddata->cd_type) {
case ESDHC_CD_GPIO:
err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0);
if (err) {
dev_err(mmc_dev(host->mmc),
"failed to request card-detect gpio!\n");
return err;
}
/* fall through */

case ESDHC_CD_CONTROLLER:
/* we have a working card_detect back */
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
break;

case ESDHC_CD_PERMANENT:
host->mmc->caps |= MMC_CAP_NONREMOVABLE;
break;

case ESDHC_CD_NONE:
break;
}

switch (boarddata->max_bus_width) {
case 8:
host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA;
break;
case 4:
host->mmc->caps |= MMC_CAP_4_BIT_DATA;
break;
case 1:
default:
host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
break;
}

return 0;
}

static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id =
of_match_device(imx_esdhc_dt_ids, &pdev->dev);
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_host *host;
struct esdhc_platform_data *boarddata;
int err;
struct pltfm_imx_data *imx_data;
bool dt = true;

host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata, 0);
if (IS_ERR(host))
Expand Down Expand Up @@ -1038,84 +1119,12 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536)
host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;

boarddata = &imx_data->boarddata;
if (sdhci_esdhc_imx_probe_dt(pdev, host, boarddata) < 0) {
if (!host->mmc->parent->platform_data) {
dev_err(mmc_dev(host->mmc), "no board data!\n");
err = -EINVAL;
goto disable_clk;
}
imx_data->boarddata = *((struct esdhc_platform_data *)
host->mmc->parent->platform_data);
dt = false;
}
/* write_protect */
if (boarddata->wp_type == ESDHC_WP_GPIO && !dt) {
err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio);
if (err) {
dev_err(mmc_dev(host->mmc),
"failed to request write-protect gpio!\n");
goto disable_clk;
}
host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
}

/* card_detect */
switch (boarddata->cd_type) {
case ESDHC_CD_GPIO:
if (dt)
break;
err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0);
if (err) {
dev_err(mmc_dev(host->mmc),
"failed to request card-detect gpio!\n");
goto disable_clk;
}
/* fall through */

case ESDHC_CD_CONTROLLER:
/* we have a working card_detect back */
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
break;

case ESDHC_CD_PERMANENT:
host->mmc->caps |= MMC_CAP_NONREMOVABLE;
break;

case ESDHC_CD_NONE:
break;
}

switch (boarddata->max_bus_width) {
case 8:
host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA;
break;
case 4:
host->mmc->caps |= MMC_CAP_4_BIT_DATA;
break;
case 1:
default:
host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
break;
}

/* sdr50 and sdr104 needs work on 1.8v signal voltage */
if ((boarddata->support_vsel) && esdhc_is_usdhc(imx_data) &&
!IS_ERR(imx_data->pins_default)) {
imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
ESDHC_PINCTRL_STATE_100MHZ);
imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,
ESDHC_PINCTRL_STATE_200MHZ);
if (IS_ERR(imx_data->pins_100mhz) ||
IS_ERR(imx_data->pins_200mhz)) {
dev_warn(mmc_dev(host->mmc),
"could not get ultra high speed state, work on normal mode\n");
/* fall back to not support uhs by specify no 1.8v quirk */
host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
}
} else {
host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
}
if (of_id)
err = sdhci_esdhc_imx_probe_dt(pdev, host, imx_data);
else
err = sdhci_esdhc_imx_probe_nondt(pdev, host, imx_data);
if (err)
goto disable_clk;

err = sdhci_add_host(host);
if (err)
Expand Down

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