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mmc: sd: Fix sd current limit setting

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Host has different current capabilities at different voltages, we need
to record these settings seperately. The defined voltages are 1.8/3.0/3.3.
For other voltages, we do not touch current limit setting.

Before we set the current limit for the sd card, find out the host's
operating voltage first and then find out the current capabilities of
the host at that voltage to set the current limit.

Signed-off-by: Aaron Lu <aaron.lu@amd.com>
Reviewed-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Aaron Lu
2012-07-04 13:31:48 +08:00
committed by Chris Ball
parent 94c1814945
commit 55c4665ea0
3 changed files with 60 additions and 50 deletions
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31
drivers/mmc/host/sdhci.c
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@@ -2906,53 +2906,28 @@ int sdhci_add_host(struct sdhci_host *host)
}
if (caps[0] & SDHCI_CAN_VDD_330) {
int max_current_330;
ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34;
max_current_330 = ((max_current_caps &
mmc->max_current_330 = ((max_current_caps &
SDHCI_MAX_CURRENT_330_MASK) >>
SDHCI_MAX_CURRENT_330_SHIFT) *
SDHCI_MAX_CURRENT_MULTIPLIER;
if (max_current_330 > 150)
mmc->caps |= MMC_CAP_SET_XPC_330;
}
if (caps[0] & SDHCI_CAN_VDD_300) {
int max_current_300;
ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31;
max_current_300 = ((max_current_caps &
mmc->max_current_300 = ((max_current_caps &
SDHCI_MAX_CURRENT_300_MASK) >>
SDHCI_MAX_CURRENT_300_SHIFT) *
SDHCI_MAX_CURRENT_MULTIPLIER;
if (max_current_300 > 150)
mmc->caps |= MMC_CAP_SET_XPC_300;
}
if (caps[0] & SDHCI_CAN_VDD_180) {
int max_current_180;
ocr_avail |= MMC_VDD_165_195;
max_current_180 = ((max_current_caps &
mmc->max_current_180 = ((max_current_caps &
SDHCI_MAX_CURRENT_180_MASK) >>
SDHCI_MAX_CURRENT_180_SHIFT) *
SDHCI_MAX_CURRENT_MULTIPLIER;
if (max_current_180 > 150)
mmc->caps |= MMC_CAP_SET_XPC_180;
/* Maximum current capabilities of the host at 1.8V */
if (max_current_180 >= 800)
mmc->caps |= MMC_CAP_MAX_CURRENT_800;
else if (max_current_180 >= 600)
mmc->caps |= MMC_CAP_MAX_CURRENT_600;
else if (max_current_180 >= 400)
mmc->caps |= MMC_CAP_MAX_CURRENT_400;
else if (max_current_180 >= 200)
mmc->caps |= MMC_CAP_MAX_CURRENT_200;
}
mmc->ocr_avail = ocr_avail;