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[MMC] sdhci: support for multiple voltages

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The sdhci controllers can support up to three voltage levels.  Detect which
and report back to the MMC layer.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Pierre Ossman
2006-06-30 02:22:23 -07:00
committed by Russell King
parent 51f82bc07a
commit 146ad66eac
2 changed files with 66 additions and 4 deletions
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10
drivers/mmc/sdhci.h
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@@ -67,6 +67,10 @@
#define SDHCI_CTRL_4BITBUS 0x02
#define SDHCI_POWER_CONTROL 0x29
#define SDHCI_POWER_ON 0x01
#define SDHCI_POWER_180 0x0A
#define SDHCI_POWER_300 0x0C
#define SDHCI_POWER_330 0x0E
#define SDHCI_BLOCK_GAP_CONTROL 0x2A
@@ -121,9 +125,12 @@
/* 3E-3F reserved */
#define SDHCI_CAPABILITIES 0x40
#define SDHCI_CAN_DO_DMA 0x00400000
#define SDHCI_CLOCK_BASE_MASK 0x00003F00
#define SDHCI_CLOCK_BASE_SHIFT 8
#define SDHCI_CAN_DO_DMA 0x00400000
#define SDHCI_CAN_VDD_330 0x01000000
#define SDHCI_CAN_VDD_300 0x02000000
#define SDHCI_CAN_VDD_180 0x04000000
/* 44-47 reserved for more caps */
@@ -151,6 +158,7 @@ struct sdhci_host {
unsigned int max_clk; /* Max possible freq (MHz) */
unsigned int clock; /* Current clock (MHz) */
unsigned short power; /* Current voltage */
struct mmc_request *mrq; /* Current request */
struct mmc_command *cmd; /* Current command */