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path: root/drivers/usb/early/ehci-dbgp.c
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Diffstat (limited to 'drivers/usb/early/ehci-dbgp.c')
-rw-r--r--drivers/usb/early/ehci-dbgp.c45
1 files changed, 26 insertions, 19 deletions
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c
index 7deae97fe50f..6198ebded3a4 100644
--- a/drivers/usb/early/ehci-dbgp.c
+++ b/drivers/usb/early/ehci-dbgp.c
@@ -9,6 +9,12 @@
#include <asm/pci-direct.h>
#include <asm/fixmap.h>
+#ifdef DBGP_DEBUG
+# define dbgp_printk printk
+#else
+static inline void dbgp_printk(const char *fmt, ...) { }
+#endif
+
static struct ehci_caps __iomem *ehci_caps;
static struct ehci_regs __iomem *ehci_regs;
static struct ehci_dbg_port __iomem *ehci_debug;
@@ -342,6 +348,7 @@ static int __init ehci_reset_port(int port)
u32 delay_time, delay;
int loop;
+ dbgp_printk("ehci_reset_port %i\n", port);
/* Reset the usb debug port */
portsc = readl(&ehci_regs->port_status[port - 1]);
portsc &= ~PORT_PE;
@@ -352,14 +359,17 @@ static int __init ehci_reset_port(int port)
for (delay_time = 0; delay_time < HUB_RESET_TIMEOUT;
delay_time += delay) {
dbgp_mdelay(delay);
-
portsc = readl(&ehci_regs->port_status[port - 1]);
+ if (!(portsc & PORT_RESET))
+ break;
+ }
if (portsc & PORT_RESET) {
/* force reset to complete */
- loop = 2;
+ loop = 100 * 1000;
writel(portsc & ~(PORT_RWC_BITS | PORT_RESET),
&ehci_regs->port_status[port - 1]);
do {
+ udelay(1);
portsc = readl(&ehci_regs->port_status[port-1]);
} while ((portsc & PORT_RESET) && (--loop > 0));
}
@@ -375,7 +385,6 @@ static int __init ehci_reset_port(int port)
/* If we've finished resetting, then break out of the loop */
if (!(portsc & PORT_RESET) && (portsc & PORT_PE))
return 0;
- }
return -EBUSY;
}
@@ -384,24 +393,18 @@ static int __init ehci_wait_for_port(int port)
u32 status;
int ret, reps;
- for (reps = 0; reps < 3; reps++) {
- dbgp_mdelay(100);
+ for (reps = 0; reps < 300; reps++) {
status = readl(&ehci_regs->status);
- if (status & STS_PCD) {
- ret = ehci_reset_port(port);
- if (ret == 0)
- return 0;
- }
+ if (status & STS_PCD)
+ break;
+ dbgp_mdelay(1);
}
+ ret = ehci_reset_port(port);
+ if (ret == 0)
+ return 0;
return -ENOTCONN;
}
-#ifdef DBGP_DEBUG
-# define dbgp_printk early_printk
-#else
-static inline void dbgp_printk(const char *fmt, ...) { }
-#endif
-
typedef void (*set_debug_port_t)(int port);
static void __init default_set_debug_port(int port)
@@ -520,7 +523,7 @@ try_next_port:
return -1;
}
- loop = 100000;
+ loop = 250 * 1000;
/* Reset the EHCI controller */
cmd = readl(&ehci_regs->command);
cmd |= CMD_RESET;
@@ -540,6 +543,7 @@ try_next_port:
ctrl |= DBGP_OWNER;
ctrl &= ~(DBGP_ENABLED | DBGP_INUSE);
writel(ctrl, &ehci_debug->control);
+ udelay(1);
/* Start the ehci running */
cmd = readl(&ehci_regs->command);
@@ -554,10 +558,13 @@ try_next_port:
loop = 10;
do {
status = readl(&ehci_regs->status);
- } while ((status & STS_HALT) && (--loop > 0));
+ if (!(status & STS_HALT))
+ break;
+ udelay(1);
+ } while (--loop > 0);
if (!loop) {
- dbgp_printk("ehci can be started\n");
+ dbgp_printk("ehci can not be started\n");
return -1;
}
dbgp_printk("ehci started\n");
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