diff options
Diffstat (limited to 'drivers/usb/early')
| -rw-r--r-- | drivers/usb/early/ehci-dbgp.c | 45 |
1 files changed, 26 insertions, 19 deletions
diff --git a/drivers/usb/early/ehci-dbgp.c b/drivers/usb/early/ehci-dbgp.c index 7deae97fe50..6198ebded3a 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"); |