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mmc: core: Factor out common code in drive strength selection 

Make a new function out of common code used for drive
strength selection.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2015-02-06 14:12:55 +02:00 committed by Ulf Hansson
parent f168359efb
commit e23350b35d
4 changed files with 46 additions and 46 deletions
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38
drivers/mmc/core/core.c
View File

@ -1639,6 +1639,44 @@ void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
mmc_host_clk_release(host);
}
int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
int card_drv_type, int *drv_type)
{
struct mmc_host *host = card->host;
int host_drv_type = SD_DRIVER_TYPE_B;
int drive_strength;
*drv_type = 0;
if (!host->ops->select_drive_strength)
return 0;
/* Use SD definition of driver strength for hosts */
if (host->caps & MMC_CAP_DRIVER_TYPE_A)
host_drv_type |= SD_DRIVER_TYPE_A;
if (host->caps & MMC_CAP_DRIVER_TYPE_C)
host_drv_type |= SD_DRIVER_TYPE_C;
if (host->caps & MMC_CAP_DRIVER_TYPE_D)
host_drv_type |= SD_DRIVER_TYPE_D;
/*
* The drive strength that the hardware can support
* depends on the board design. Pass the appropriate
* information and let the hardware specific code
* return what is possible given the options
*/
mmc_host_clk_hold(host);
drive_strength = host->ops->select_drive_strength(card, max_dtr,
host_drv_type,
card_drv_type,
drv_type);
mmc_host_clk_release(host);
return drive_strength;
}
/*
* Apply power to the MMC stack. This is a two-stage process.
* First, we enable power to the card without the clock running.

2
drivers/mmc/core/core.h
View File

@ -50,6 +50,8 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, u32 ocr);
int __mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage);
void mmc_set_timing(struct mmc_host *host, unsigned int timing);
void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);
int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
int card_drv_type, int *drv_type);
void mmc_power_up(struct mmc_host *host, u32 ocr);
void mmc_power_off(struct mmc_host *host);
void mmc_power_cycle(struct mmc_host *host, u32 ocr);

27
drivers/mmc/core/sd.c
View File

@ -386,35 +386,14 @@ out:
static int sd_select_driver_type(struct mmc_card *card, u8 *status)
{
int host_drv_type = SD_DRIVER_TYPE_B;
int card_drv_type, drive_strength, drv_type;
int err;
if (!card->host->ops->select_drive_strength)
return 0;
if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
host_drv_type |= SD_DRIVER_TYPE_A;
if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
host_drv_type |= SD_DRIVER_TYPE_C;
if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
host_drv_type |= SD_DRIVER_TYPE_D;
card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
/*
* The drive strength that the hardware can support
* depends on the board design. Pass the appropriate
* information and let the hardware specific code
* return what is possible given the options
*/
mmc_host_clk_hold(card->host);
drive_strength = card->host->ops->select_drive_strength(card,
card->sw_caps.uhs_max_dtr,
host_drv_type, card_drv_type, &drv_type);
mmc_host_clk_release(card->host);
drive_strength = mmc_select_drive_strength(card,
card->sw_caps.uhs_max_dtr,
card_drv_type, &drv_type);
if (drive_strength) {
err = mmc_sd_switch(card, 1, 2, drive_strength, status);

25
drivers/mmc/core/sdio.c
View File

@ -402,34 +402,15 @@ static unsigned char host_drive_to_sdio_drive(int host_strength)
static void sdio_select_driver_type(struct mmc_card *card)
{
int host_drv_type = SD_DRIVER_TYPE_B;
int card_drv_type, drive_strength, drv_type;
unsigned char card_strength;
int err;
if (!card->host->ops->select_drive_strength)
return;
if (card->host->caps & MMC_CAP_DRIVER_TYPE_A)
host_drv_type |= SD_DRIVER_TYPE_A;
if (card->host->caps & MMC_CAP_DRIVER_TYPE_C)
host_drv_type |= SD_DRIVER_TYPE_C;
if (card->host->caps & MMC_CAP_DRIVER_TYPE_D)
host_drv_type |= SD_DRIVER_TYPE_D;
card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
/*
* The drive strength that the hardware can support
* depends on the board design. Pass the appropriate
* information and let the hardware specific code
* return what is possible given the options
*/
drive_strength = card->host->ops->select_drive_strength(card,
card->sw_caps.uhs_max_dtr,
host_drv_type, card_drv_type, &drv_type);
drive_strength = mmc_select_drive_strength(card,
card->sw_caps.uhs_max_dtr,
card_drv_type, &drv_type);
if (drive_strength) {
/* if error just use default for drive strength B */