diff options
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
| -rw-r--r-- | drivers/usb/host/ehci-hub.c | 55 |
1 files changed, 24 insertions, 31 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index df00fcbadfbc..12f881ff4b23 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -193,6 +193,7 @@ static int ehci_bus_resume (struct usb_hcd *hcd) static int check_reset_complete ( struct ehci_hcd *ehci, int index, + u32 __iomem *status_reg, int port_status ) { if (!(port_status & PORT_CONNECT)) { @@ -217,8 +218,7 @@ static int check_reset_complete ( // what happens if HCS_N_CC(params) == 0 ? port_status |= PORT_OWNER; port_status &= ~PORT_RWC_BITS; - ehci_writel(ehci, port_status, - &ehci->regs->port_status [index]); + ehci_writel(ehci, port_status, status_reg); } else ehci_dbg (ehci, "port %d high speed\n", index + 1); @@ -347,6 +347,7 @@ static int ehci_hub_control ( ) { struct ehci_hcd *ehci = hcd_to_ehci (hcd); int ports = HCS_N_PORTS (ehci->hcs_params); + u32 __iomem *status_reg = &ehci->regs->port_status[wIndex - 1]; u32 temp, status; unsigned long flags; int retval = 0; @@ -375,18 +376,17 @@ static int ehci_hub_control ( if (!wIndex || wIndex > ports) goto error; wIndex--; - temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); + temp = ehci_readl(ehci, status_reg); if (temp & PORT_OWNER) break; switch (wValue) { case USB_PORT_FEAT_ENABLE: - ehci_writel(ehci, temp & ~PORT_PE, - &ehci->regs->port_status [wIndex]); + ehci_writel(ehci, temp & ~PORT_PE, status_reg); break; case USB_PORT_FEAT_C_ENABLE: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC, - &ehci->regs->port_status [wIndex]); + status_reg); break; case USB_PORT_FEAT_SUSPEND: if (temp & PORT_RESET) @@ -399,7 +399,7 @@ static int ehci_hub_control ( /* resume signaling for 20 msec */ temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); ehci_writel(ehci, temp | PORT_RESUME, - &ehci->regs->port_status [wIndex]); + status_reg); ehci->reset_done [wIndex] = jiffies + msecs_to_jiffies (20); } @@ -411,15 +411,15 @@ static int ehci_hub_control ( if (HCS_PPC (ehci->hcs_params)) ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_POWER), - &ehci->regs->port_status [wIndex]); + status_reg); break; case USB_PORT_FEAT_C_CONNECTION: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC, - &ehci->regs->port_status [wIndex]); + status_reg); break; case USB_PORT_FEAT_C_OVER_CURRENT: ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC, - &ehci->regs->port_status [wIndex]); + status_reg); break; case USB_PORT_FEAT_C_RESET: /* GetPortStatus clears reset */ @@ -443,7 +443,7 @@ static int ehci_hub_control ( goto error; wIndex--; status = 0; - temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); + temp = ehci_readl(ehci, status_reg); // wPortChange bits if (temp & PORT_CSC) @@ -461,13 +461,11 @@ static int ehci_hub_control ( ehci->reset_done [wIndex] = 0; /* stop resume signaling */ - temp = ehci_readl(ehci, - &ehci->regs->port_status [wIndex]); + temp = ehci_readl(ehci, status_reg); ehci_writel(ehci, - temp & ~(PORT_RWC_BITS | PORT_RESUME), - &ehci->regs->port_status [wIndex]); - retval = handshake(ehci, - &ehci->regs->port_status [wIndex], + temp & ~(PORT_RWC_BITS | PORT_RESUME), + status_reg); + retval = handshake(ehci, status_reg, PORT_RESUME, 0, 2000 /* 2msec */); if (retval != 0) { ehci_err (ehci, "port %d resume error %d\n", @@ -486,12 +484,11 @@ static int ehci_hub_control ( /* force reset to complete */ ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET), - &ehci->regs->port_status [wIndex]); + status_reg); /* REVISIT: some hardware needs 550+ usec to clear * this bit; seems too long to spin routinely... */ - retval = handshake(ehci, - &ehci->regs->port_status [wIndex], + retval = handshake(ehci, status_reg, PORT_RESET, 0, 750); if (retval != 0) { ehci_err (ehci, "port %d reset error %d\n", @@ -500,9 +497,8 @@ static int ehci_hub_control ( } /* see what we found out */ - temp = check_reset_complete (ehci, wIndex, - ehci_readl(ehci, - &ehci->regs->port_status [wIndex])); + temp = check_reset_complete (ehci, wIndex, status_reg, + ehci_readl(ehci, status_reg)); } // don't show wPortStatus if it's owned by a companion hc @@ -547,7 +543,7 @@ static int ehci_hub_control ( if (!wIndex || wIndex > ports) goto error; wIndex--; - temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]); + temp = ehci_readl(ehci, status_reg); if (temp & PORT_OWNER) break; @@ -561,13 +557,12 @@ static int ehci_hub_control ( goto error; if (device_may_wakeup(&hcd->self.root_hub->dev)) temp |= PORT_WAKE_BITS; - ehci_writel(ehci, temp | PORT_SUSPEND, - &ehci->regs->port_status [wIndex]); + ehci_writel(ehci, temp | PORT_SUSPEND, status_reg); break; case USB_PORT_FEAT_POWER: if (HCS_PPC (ehci->hcs_params)) ehci_writel(ehci, temp | PORT_POWER, - &ehci->regs->port_status [wIndex]); + status_reg); break; case USB_PORT_FEAT_RESET: if (temp & PORT_RESUME) @@ -595,8 +590,7 @@ static int ehci_hub_control ( ehci->reset_done [wIndex] = jiffies + msecs_to_jiffies (50); } - ehci_writel(ehci, temp, - &ehci->regs->port_status [wIndex]); + ehci_writel(ehci, temp, status_reg); break; /* For downstream facing ports (these): one hub port is put @@ -611,8 +605,7 @@ static int ehci_hub_control ( ehci_quiesce(ehci); ehci_halt(ehci); temp |= selector << 16; - ehci_writel(ehci, temp, - &ehci->regs->port_status [wIndex]); + ehci_writel(ehci, temp, status_reg); break; default: |
