joel16/android_kernel_sony_msm8994_rework
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disable socket power in adapter driver instead of media one

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Socket power must be fully controlled by adapter driver. This also prevents
unnecessary power-off of the socket when media driver is unloaded, yet
media remains in the socket.

Signed-off-by: Alex Dubov <oakad@yahoo.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Alex Dubov 2007-05-01 20:14:55 -07:00 committed by Pierre Ossman
parent 36f021b579
commit 055b822414
3 changed files with 26 additions and 15 deletions
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27
drivers/misc/tifm_7xx1.c
View File

@ -105,7 +105,8 @@ static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
== TIFM_TYPE_XD)
msleep(40);
writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00,
sock_addr + SOCK_CONTROL);
/* wait for power to stabilize */
msleep(20);
for (cnt = 16; cnt <= 256; cnt <<= 1) {
@ -122,6 +123,12 @@ static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
}
inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
{
writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
sock_addr + SOCK_CONTROL);
}
inline static char __iomem *
tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
{
@ -133,6 +140,7 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
media_switcher);
struct tifm_dev *sock;
char __iomem *sock_addr;
unsigned long flags;
unsigned char media_id;
unsigned int socket_change_set, cnt;
@ -158,11 +166,12 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
"%s : demand removing card from socket %u:%u\n",
fm->cdev.class_id, fm->id, cnt);
fm->sockets[cnt] = NULL;
sock_addr = sock->addr;
spin_unlock_irqrestore(&fm->lock, flags);
device_unregister(&sock->dev);
spin_lock_irqsave(&fm->lock, flags);
writel(0x0e00, tifm_7xx1_sock_addr(fm->addr, cnt)
+ SOCK_CONTROL);
tifm_7xx1_sock_power_off(sock_addr);
writel(0x0e00, sock_addr + SOCK_CONTROL);
}
spin_unlock_irqrestore(&fm->lock, flags);
@ -205,8 +214,16 @@ static void tifm_7xx1_switch_media(struct work_struct *work)
static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
int cnt;
dev_dbg(&dev->dev, "suspending host\n");
for (cnt = 0; cnt < fm->num_sockets; cnt++) {
if (fm->sockets[cnt])
tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
}
pci_save_state(dev);
pci_enable_wake(dev, pci_choose_state(dev, state), 0);
pci_disable_device(dev);
@ -357,6 +374,7 @@ err_out:
static void tifm_7xx1_remove(struct pci_dev *dev)
{
struct tifm_adapter *fm = pci_get_drvdata(dev);
int cnt;
fm->eject = tifm_7xx1_dummy_eject;
writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
@ -365,6 +383,9 @@ static void tifm_7xx1_remove(struct pci_dev *dev)
tifm_remove_adapter(fm);
for (cnt = 0; cnt < fm->num_sockets; cnt++)
tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));
pci_set_drvdata(dev, NULL);
iounmap(fm->addr);

13
drivers/mmc/host/tifm_sd.c
View File

@ -1021,10 +1021,6 @@ static void tifm_sd_remove(struct tifm_dev *sock)
mmc_remove_host(mmc);
dev_dbg(&sock->dev, "after remove\n");
/* The meaning of the bit majority in this constant is unknown. */
writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
sock->addr + SOCK_CONTROL);
mmc_free_host(mmc);
}
@ -1032,14 +1028,7 @@ static void tifm_sd_remove(struct tifm_dev *sock)
static int tifm_sd_suspend(struct tifm_dev *sock, pm_message_t state)
{
struct mmc_host *mmc = tifm_get_drvdata(sock);
int rc;
rc = mmc_suspend_host(mmc, state);
/* The meaning of the bit majority in this constant is unknown. */
writel(0xfff8 & readl(sock->addr + SOCK_CONTROL),
sock->addr + SOCK_CONTROL);
return rc;
return mmc_suspend_host(tifm_get_drvdata(sock), state);
}
static int tifm_sd_resume(struct tifm_dev *sock)

1
include/linux/tifm.h
View File

@ -63,6 +63,7 @@ enum {
#define TIFM_CTRL_LED 0x00000040
#define TIFM_CTRL_FAST_CLK 0x00000100
#define TIFM_CTRL_POWER_MASK 0x00000007
#define TIFM_SOCK_STATE_OCCUPIED 0x00000008
#define TIFM_SOCK_STATE_POWERED 0x00000080