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fix reset function in USB driver

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SVN-Revision: 8332
This commit is contained in:
Gabor Juhos 2007-08-03 17:31:52 +00:00
parent ce520f5424
commit 1152f2f11f
1 changed files with 11 additions and 7 deletions
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18
target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c
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@ -54,6 +54,7 @@ MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
#define ADMHCD_INTMASK 0x00000001 /* Interrupt mask */
#define ADMHCD_REG_HOSTCONTROL 0x10
#define ADMHCD_DMA_EN 0x00000004 /* USB host DMA enable */
#define ADMHCD_STATE_MASK 0x00000003
#define ADMHCD_STATE_RST 0x00000000 /* bus state reset */
#define ADMHCD_STATE_RES 0x00000001 /* bus state resume */
#define ADMHCD_STATE_OP 0x00000002 /* bus state operational */
@ -776,7 +777,7 @@ static int admhcd_sw_reset(struct admhcd *ahcd)
static int admhcd_reset(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
u32 val = 0;
u32 state = 0;
int ret, timeout = 15; /* ms */
unsigned long t;
@ -785,19 +786,22 @@ static int admhcd_reset(struct usb_hcd *hcd)
return ret;
t = jiffies + msecs_to_jiffies(timeout);
while (time_before_eq(jiffies, t)) {
msleep(4);
do {
spin_lock_irq(&ahcd->lock);
val = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL) & ADMHCD_STATE_RST;
state = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL);
spin_unlock_irq(&ahcd->lock);
if (val)
state &= ADMHCD_STATE_MASK;
if (state == ADMHCD_STATE_RST)
break;
}
if (!val) {
msleep(4);
} while (time_before_eq(jiffies, t));
if (state != ADMHCD_STATE_RST) {
printk(KERN_WARNING "%s: device not ready after %dms\n",
hcd_name, timeout);
ret = -ENODEV;
}
return ret;
}