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[MMC] wbsd suspend support

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Proper handling of suspend/resume in the wbsd driver.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Pierre Ossman 2005-10-28 21:37:29 +01:00 committed by Russell King
parent 84860bf064
commit 19c1f3ca42
1 changed files with 91 additions and 28 deletions
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119
drivers/mmc/wbsd.c
View file

@ -1033,13 +1033,16 @@ static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
}
else
{
setup &= ~WBSD_DAT3_H;
if (setup & WBSD_DAT3_H)
{
setup &= ~WBSD_DAT3_H;
/*
* We cannot resume card detection immediatly
* because of capacitance and delays in the chip.
*/
mod_timer(&host->ignore_timer, jiffies + HZ/100);
/*
* We cannot resume card detection immediatly
* because of capacitance and delays in the chip.
*/
mod_timer(&host->ignore_timer, jiffies + HZ/100);
}
}
wbsd_write_index(host, WBSD_IDX_SETUP, setup);
@ -1461,8 +1464,10 @@ static int __devinit wbsd_scan(struct wbsd_host* host)
{
id = 0xFFFF;
outb(unlock_codes[j], config_ports[i]);
outb(unlock_codes[j], config_ports[i]);
host->config = config_ports[i];
host->unlock_code = unlock_codes[j];
wbsd_unlock_config(host);
outb(WBSD_CONF_ID_HI, config_ports[i]);
id = inb(config_ports[i] + 1) << 8;
@ -1470,13 +1475,13 @@ static int __devinit wbsd_scan(struct wbsd_host* host)
outb(WBSD_CONF_ID_LO, config_ports[i]);
id |= inb(config_ports[i] + 1);
wbsd_lock_config(host);
for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++)
{
if (id == valid_ids[k])
{
host->chip_id = id;
host->config = config_ports[i];
host->unlock_code = unlock_codes[i];
return 0;
}
@ -1487,13 +1492,14 @@ static int __devinit wbsd_scan(struct wbsd_host* host)
DBG("Unknown hardware (id %x) found at %x\n",
id, config_ports[i]);
}
outb(LOCK_CODE, config_ports[i]);
}
release_region(config_ports[i], 2);
}
host->config = 0;
host->unlock_code = 0;
return -ENODEV;
}
@ -1699,8 +1705,10 @@ static void __devexit wbsd_release_resources(struct wbsd_host* host)
* Configure the resources the chip should use.
*/
static void __devinit wbsd_chip_config(struct wbsd_host* host)
static void wbsd_chip_config(struct wbsd_host* host)
{
wbsd_unlock_config(host);
/*
* Reset the chip.
*/
@ -1733,16 +1741,20 @@ static void __devinit wbsd_chip_config(struct wbsd_host* host)
*/
wbsd_write_config(host, WBSD_CONF_ENABLE, 1);
wbsd_write_config(host, WBSD_CONF_POWER, 0x20);
wbsd_lock_config(host);
}
/*
* Check that configured resources are correct.
*/
static int __devinit wbsd_chip_validate(struct wbsd_host* host)
static int wbsd_chip_validate(struct wbsd_host* host)
{
int base, irq, dma;
wbsd_unlock_config(host);
/*
* Select SD/MMC function.
*/
@ -1758,6 +1770,8 @@ static int __devinit wbsd_chip_validate(struct wbsd_host* host)
dma = wbsd_read_config(host, WBSD_CONF_DRQ);
wbsd_lock_config(host);
/*
* Validate against given configuration.
*/
@ -1771,6 +1785,20 @@ static int __devinit wbsd_chip_validate(struct wbsd_host* host)
return 1;
}
/*
* Powers down the SD function
*/
static void wbsd_chip_poweroff(struct wbsd_host* host)
{
wbsd_unlock_config(host);
wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
wbsd_lock_config(host);
}
/*****************************************************************************\
* *
* Devices setup and shutdown *
@ -1844,7 +1872,11 @@ static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma,
*/
#ifdef CONFIG_PM
if (host->config)
{
wbsd_unlock_config(host);
wbsd_write_config(host, WBSD_CONF_PME, 0xA0);
wbsd_lock_config(host);
}
#endif
/*
* Allow device to initialise itself properly.
@ -1885,16 +1917,11 @@ static void __devexit wbsd_shutdown(struct device* dev, int pnp)
mmc_remove_host(mmc);
/*
* Power down the SD/MMC function.
*/
if (!pnp)
{
/*
* Power down the SD/MMC function.
*/
wbsd_unlock_config(host);
wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD);
wbsd_write_config(host, WBSD_CONF_ENABLE, 0);
wbsd_lock_config(host);
}
wbsd_chip_poweroff(host);
wbsd_release_resources(host);
@ -1955,23 +1982,59 @@ static void __devexit wbsd_pnp_remove(struct pnp_dev * dev)
*/
#ifdef CONFIG_PM
static int wbsd_suspend(struct device *dev, pm_message_t state)
{
DBGF("Not yet supported\n");
struct mmc_host *mmc = dev_get_drvdata(dev);
struct wbsd_host *host;
int ret;
if (!mmc)
return 0;
DBG("Suspending...\n");
ret = mmc_suspend_host(mmc, state);
if (!ret)
return ret;
host = mmc_priv(mmc);
wbsd_chip_poweroff(host);
return 0;
}
static int wbsd_resume(struct device *dev)
{
DBGF("Not yet supported\n");
struct mmc_host *mmc = dev_get_drvdata(dev);
struct wbsd_host *host;
return 0;
if (!mmc)
return 0;
DBG("Resuming...\n");
host = mmc_priv(mmc);
wbsd_chip_config(host);
/*
* Allow device to initialise itself properly.
*/
mdelay(5);
wbsd_init_device(host);
return mmc_resume_host(mmc);
}
#else
#else /* CONFIG_PM */
#define wbsd_suspend NULL
#define wbsd_resume NULL
#endif
#endif /* CONFIG_PM */
static struct platform_device *wbsd_device;