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| author | Gabor Juhos <juhosg@openwrt.org> | 2007-08-03 17:31:52 +0000 |
|---|---|---|
| committer | Gabor Juhos <juhosg@openwrt.org> | 2007-08-03 17:31:52 +0000 |
| commit | 1152f2f11f340cffa9e2a6190ecf505e977ae3a7 (patch) | |
| tree | c3afee740218ad1dec8c9fa095f2eef801c7a635 /target/linux | |
| parent | ce520f5424fb44d0bf5f0328f2e4b786e5d7d05e (diff) | |
| download | mtk-20170518-1152f2f11f340cffa9e2a6190ecf505e977ae3a7.zip mtk-20170518-1152f2f11f340cffa9e2a6190ecf505e977ae3a7.tar.gz mtk-20170518-1152f2f11f340cffa9e2a6190ecf505e977ae3a7.tar.bz2 | |
fix reset function in USB driver
SVN-Revision: 8332
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c b/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c index 6e005bf..875dc6c 100644 --- a/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c +++ b/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c @@ -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; } |