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omap_hsmmc: keep track of power mode

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This patch is preparation for adding context save and restore support.

Keep track of the current power mode so that the context restore function
can avoid restoring the context for a card if the power has been switched
off.  If the power is off, the card must be reinitialized anyway which
will re-establish the context.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Adrian Hunter 2009-09-22 16:44:42 -07:00 committed by Linus Torvalds
parent 1887bde391
commit a3621465b4
1 changed files with 19 additions and 8 deletions
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27
drivers/mmc/host/omap_hsmmc.c
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@ -143,6 +143,7 @@ struct mmc_omap_host {
unsigned int dma_len; unsigned int dma_len;
unsigned int dma_sg_idx; unsigned int dma_sg_idx;
unsigned char bus_mode; unsigned char bus_mode;
unsigned char power_mode;
u32 *buffer; u32 *buffer;
u32 bytesleft; u32 bytesleft;
int suspended; int suspended;
@ -863,16 +864,25 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
unsigned long regval; unsigned long regval;
unsigned long timeout; unsigned long timeout;
u32 con; u32 con;
int do_send_init_stream = 0;
mmc_host_enable(host->mmc); mmc_host_enable(host->mmc);
switch (ios->power_mode) { if (ios->power_mode != host->power_mode) {
case MMC_POWER_OFF: switch (ios->power_mode) {
mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); case MMC_POWER_OFF:
break; mmc_slot(host).set_power(host->dev, host->slot_id,
case MMC_POWER_UP: 0, 0);
mmc_slot(host).set_power(host->dev, host->slot_id, 1, ios->vdd); break;
break; case MMC_POWER_UP:
mmc_slot(host).set_power(host->dev, host->slot_id,
1, ios->vdd);
break;
case MMC_POWER_ON:
do_send_init_stream = 1;
break;
}
host->power_mode = ios->power_mode;
} }
con = OMAP_HSMMC_READ(host->base, CON); con = OMAP_HSMMC_READ(host->base, CON);
@ -938,7 +948,7 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
OMAP_HSMMC_WRITE(host->base, SYSCTL, OMAP_HSMMC_WRITE(host->base, SYSCTL,
OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); OMAP_HSMMC_READ(host->base, SYSCTL) | CEN);
if (ios->power_mode == MMC_POWER_ON) if (do_send_init_stream)
send_init_stream(host); send_init_stream(host);
if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
@ -1116,6 +1126,7 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
host->slot_id = 0; host->slot_id = 0;
host->mapbase = res->start; host->mapbase = res->start;
host->base = ioremap(host->mapbase, SZ_4K); host->base = ioremap(host->mapbase, SZ_4K);
host->power_mode = -1;
platform_set_drvdata(pdev, host); platform_set_drvdata(pdev, host);
INIT_WORK(&host->mmc_carddetect_work, mmc_omap_detect); INIT_WORK(&host->mmc_carddetect_work, mmc_omap_detect);