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fsl_esdhc: Fix the voltage validation process

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The current code use all the voltage range support by the host
controller to do the validation.  This will cause problem when
the host supports Low Voltage Range.  Change the validation
voltage to be based on board setup.

Signed-off-by: Li Yang <leoli@freescale.com>
Tested-by: Stefano Babic <sbabic@denx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Li Yang 2010-11-25 17:06:09 +00:00 committed by Wolfgang Denk
parent 9a4d50e34d
commit d42f60ffca
1 changed files with 15 additions and 5 deletions
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20
drivers/mmc/fsl_esdhc.c
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@ -444,7 +444,7 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
{
struct fsl_esdhc *regs;
struct mmc *mmc;
u32 caps;
u32 caps, voltage_caps;
if (!cfg)
return -1;
@ -462,14 +462,24 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
mmc->set_ios = esdhc_set_ios;
mmc->init = esdhc_init;
voltage_caps = 0;
caps = regs->hostcapblt;
if (caps & ESDHC_HOSTCAPBLT_VS18)
mmc->voltages |= MMC_VDD_165_195;
voltage_caps |= MMC_VDD_165_195;
if (caps & ESDHC_HOSTCAPBLT_VS30)
mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31;
if (caps & ESDHC_HOSTCAPBLT_VS33)
mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34;
#ifdef CONFIG_SYS_SD_VOLTAGE
mmc->voltages = CONFIG_SYS_SD_VOLTAGE;
#else
mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
#endif
if ((mmc->voltages & voltage_caps) == 0) {
printf("voltage not supported by controller\n");
return -1;
}
mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;