aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/host/ehci-hub.c
diff options
context:
space:
mode:
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2006-12-15 06:54:08 +1100
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-07 15:44:32 -0800
commit083522d76662cda71328df1f3d75e5a9057c7c9f (patch)
treeeafbb962ec90431d0c1b490b4caea7cf9b54672c /drivers/usb/host/ehci-hub.c
parent11d1a4aa8d657478cb2e5d33f203ba8f01b9ac24 (diff)
downloadlinux-linaro-stable-083522d76662cda71328df1f3d75e5a9057c7c9f.tar.gz
USB: Implement support for EHCI with big endian MMIO
This patch implements supports for EHCI controllers whose MMIO registers are big endian and enables that functionality for the Toshiba SCC chip. It does _not_ add support for big endian in-memory data structures as this is not needed for that chip and I hope it will never be. The guts of the patch are to convert readl(...) to ehci_readl(ehci, ...) and similarly for register writes. Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/ehci-hub.c')
-rw-r--r--drivers/usb/host/ehci-hub.c118
1 files changed, 63 insertions, 55 deletions
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index bfe5f307cba6..df00fcbadfbc 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -47,7 +47,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
ehci_quiesce (ehci);
hcd->state = HC_STATE_QUIESCING;
}
- ehci->command = readl (&ehci->regs->command);
+ ehci->command = ehci_readl(ehci, &ehci->regs->command);
if (ehci->reclaim)
ehci->reclaim_ready = 1;
ehci_work(ehci);
@@ -60,7 +60,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
ehci->bus_suspended = 0;
while (port--) {
u32 __iomem *reg = &ehci->regs->port_status [port];
- u32 t1 = readl (reg) & ~PORT_RWC_BITS;
+ u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
u32 t2 = t1;
/* keep track of which ports we suspend */
@@ -79,7 +79,7 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
if (t1 != t2) {
ehci_vdbg (ehci, "port %d, %08x -> %08x\n",
port + 1, t1, t2);
- writel (t2, reg);
+ ehci_writel(ehci, t2, reg);
}
}
@@ -92,8 +92,8 @@ static int ehci_bus_suspend (struct usb_hcd *hcd)
mask = INTR_MASK;
if (!device_may_wakeup(&hcd->self.root_hub->dev))
mask &= ~STS_PCD;
- writel(mask, &ehci->regs->intr_enable);
- readl(&ehci->regs->intr_enable);
+ ehci_writel(ehci, mask, &ehci->regs->intr_enable);
+ ehci_readl(ehci, &ehci->regs->intr_enable);
ehci->next_statechange = jiffies + msecs_to_jiffies(10);
spin_unlock_irq (&ehci->lock);
@@ -118,26 +118,26 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
* the last user of the controller, not reset/pm hardware keeping
* state we gave to it.
*/
- temp = readl(&ehci->regs->intr_enable);
+ temp = ehci_readl(ehci, &ehci->regs->intr_enable);
ehci_dbg(ehci, "resume root hub%s\n", temp ? "" : " after power loss");
/* at least some APM implementations will try to deliver
* IRQs right away, so delay them until we're ready.
*/
- writel(0, &ehci->regs->intr_enable);
+ ehci_writel(ehci, 0, &ehci->regs->intr_enable);
/* re-init operational registers */
- writel(0, &ehci->regs->segment);
- writel(ehci->periodic_dma, &ehci->regs->frame_list);
- writel((u32) ehci->async->qh_dma, &ehci->regs->async_next);
+ ehci_writel(ehci, 0, &ehci->regs->segment);
+ ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
+ ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
/* restore CMD_RUN, framelist size, and irq threshold */
- writel (ehci->command, &ehci->regs->command);
+ ehci_writel(ehci, ehci->command, &ehci->regs->command);
/* manually resume the ports we suspended during bus_suspend() */
i = HCS_N_PORTS (ehci->hcs_params);
while (i--) {
- temp = readl (&ehci->regs->port_status [i]);
+ temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
temp &= ~(PORT_RWC_BITS
| PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E);
if (test_bit(i, &ehci->bus_suspended) &&
@@ -145,20 +145,20 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
ehci->reset_done [i] = jiffies + msecs_to_jiffies (20);
temp |= PORT_RESUME;
}
- writel (temp, &ehci->regs->port_status [i]);
+ ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
}
i = HCS_N_PORTS (ehci->hcs_params);
mdelay (20);
while (i--) {
- temp = readl (&ehci->regs->port_status [i]);
+ temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
if (test_bit(i, &ehci->bus_suspended) &&
(temp & PORT_SUSPEND)) {
temp &= ~(PORT_RWC_BITS | PORT_RESUME);
- writel (temp, &ehci->regs->port_status [i]);
+ ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
ehci_vdbg (ehci, "resumed port %d\n", i + 1);
}
}
- (void) readl (&ehci->regs->command);
+ (void) ehci_readl(ehci, &ehci->regs->command);
/* maybe re-activate the schedule(s) */
temp = 0;
@@ -168,14 +168,14 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
temp |= CMD_PSE;
if (temp) {
ehci->command |= temp;
- writel (ehci->command, &ehci->regs->command);
+ ehci_writel(ehci, ehci->command, &ehci->regs->command);
}
ehci->next_statechange = jiffies + msecs_to_jiffies(5);
hcd->state = HC_STATE_RUNNING;
/* Now we can safely re-enable irqs */
- writel(INTR_MASK, &ehci->regs->intr_enable);
+ ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
spin_unlock_irq (&ehci->lock);
return 0;
@@ -217,7 +217,8 @@ static int check_reset_complete (
// what happens if HCS_N_CC(params) == 0 ?
port_status |= PORT_OWNER;
port_status &= ~PORT_RWC_BITS;
- writel (port_status, &ehci->regs->port_status [index]);
+ ehci_writel(ehci, port_status,
+ &ehci->regs->port_status [index]);
} else
ehci_dbg (ehci, "port %d high speed\n", index + 1);
@@ -268,13 +269,14 @@ ehci_hub_status_data (struct usb_hcd *hcd, char *buf)
/* port N changes (bit N)? */
spin_lock_irqsave (&ehci->lock, flags);
for (i = 0; i < ports; i++) {
- temp = readl (&ehci->regs->port_status [i]);
+ temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
if (temp & PORT_OWNER) {
/* don't report this in GetPortStatus */
if (temp & PORT_CSC) {
temp &= ~PORT_RWC_BITS;
temp |= PORT_CSC;
- writel (temp, &ehci->regs->port_status [i]);
+ ehci_writel(ehci, temp,
+ &ehci->regs->port_status [i]);
}
continue;
}
@@ -373,18 +375,18 @@ static int ehci_hub_control (
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
- temp = readl (&ehci->regs->port_status [wIndex]);
+ temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]);
if (temp & PORT_OWNER)
break;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
- writel (temp & ~PORT_PE,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp & ~PORT_PE,
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_C_ENABLE:
- writel((temp & ~PORT_RWC_BITS) | PORT_PEC,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_PEC,
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_SUSPEND:
if (temp & PORT_RESET)
@@ -396,8 +398,8 @@ static int ehci_hub_control (
goto error;
/* resume signaling for 20 msec */
temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
- writel (temp | PORT_RESUME,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp | PORT_RESUME,
+ &ehci->regs->port_status [wIndex]);
ehci->reset_done [wIndex] = jiffies
+ msecs_to_jiffies (20);
}
@@ -407,16 +409,17 @@ static int ehci_hub_control (
break;
case USB_PORT_FEAT_POWER:
if (HCS_PPC (ehci->hcs_params))
- writel (temp & ~(PORT_RWC_BITS | PORT_POWER),
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci,
+ temp & ~(PORT_RWC_BITS | PORT_POWER),
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_C_CONNECTION:
- writel((temp & ~PORT_RWC_BITS) | PORT_CSC,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_CSC,
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
- writel((temp & ~PORT_RWC_BITS) | PORT_OCC,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, (temp & ~PORT_RWC_BITS) | PORT_OCC,
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_C_RESET:
/* GetPortStatus clears reset */
@@ -424,7 +427,7 @@ static int ehci_hub_control (
default:
goto error;
}
- readl (&ehci->regs->command); /* unblock posted write */
+ ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
break;
case GetHubDescriptor:
ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
@@ -440,7 +443,7 @@ static int ehci_hub_control (
goto error;
wIndex--;
status = 0;
- temp = readl (&ehci->regs->port_status [wIndex]);
+ temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]);
// wPortChange bits
if (temp & PORT_CSC)
@@ -458,12 +461,14 @@ static int ehci_hub_control (
ehci->reset_done [wIndex] = 0;
/* stop resume signaling */
- temp = readl (&ehci->regs->port_status [wIndex]);
- writel (temp & ~(PORT_RWC_BITS | PORT_RESUME),
- &ehci->regs->port_status [wIndex]);
- retval = handshake (
- &ehci->regs->port_status [wIndex],
- PORT_RESUME, 0, 2000 /* 2msec */);
+ temp = ehci_readl(ehci,
+ &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci,
+ temp & ~(PORT_RWC_BITS | PORT_RESUME),
+ &ehci->regs->port_status [wIndex]);
+ retval = handshake(ehci,
+ &ehci->regs->port_status [wIndex],
+ PORT_RESUME, 0, 2000 /* 2msec */);
if (retval != 0) {
ehci_err (ehci, "port %d resume error %d\n",
wIndex + 1, retval);
@@ -480,13 +485,13 @@ static int ehci_hub_control (
ehci->reset_done [wIndex] = 0;
/* force reset to complete */
- writel (temp & ~(PORT_RWC_BITS | PORT_RESET),
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
+ &ehci->regs->port_status [wIndex]);
/* REVISIT: some hardware needs 550+ usec to clear
* this bit; seems too long to spin routinely...
*/
- retval = handshake (
- &ehci->regs->port_status [wIndex],
+ retval = handshake(ehci,
+ &ehci->regs->port_status [wIndex],
PORT_RESET, 0, 750);
if (retval != 0) {
ehci_err (ehci, "port %d reset error %d\n",
@@ -496,7 +501,8 @@ static int ehci_hub_control (
/* see what we found out */
temp = check_reset_complete (ehci, wIndex,
- readl (&ehci->regs->port_status [wIndex]));
+ ehci_readl(ehci,
+ &ehci->regs->port_status [wIndex]));
}
// don't show wPortStatus if it's owned by a companion hc
@@ -541,7 +547,7 @@ static int ehci_hub_control (
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
- temp = readl (&ehci->regs->port_status [wIndex]);
+ temp = ehci_readl(ehci, &ehci->regs->port_status [wIndex]);
if (temp & PORT_OWNER)
break;
@@ -555,13 +561,13 @@ static int ehci_hub_control (
goto error;
if (device_may_wakeup(&hcd->self.root_hub->dev))
temp |= PORT_WAKE_BITS;
- writel (temp | PORT_SUSPEND,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp | PORT_SUSPEND,
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_POWER:
if (HCS_PPC (ehci->hcs_params))
- writel (temp | PORT_POWER,
- &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp | PORT_POWER,
+ &ehci->regs->port_status [wIndex]);
break;
case USB_PORT_FEAT_RESET:
if (temp & PORT_RESUME)
@@ -589,7 +595,8 @@ static int ehci_hub_control (
ehci->reset_done [wIndex] = jiffies
+ msecs_to_jiffies (50);
}
- writel (temp, &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp,
+ &ehci->regs->port_status [wIndex]);
break;
/* For downstream facing ports (these): one hub port is put
@@ -604,13 +611,14 @@ static int ehci_hub_control (
ehci_quiesce(ehci);
ehci_halt(ehci);
temp |= selector << 16;
- writel (temp, &ehci->regs->port_status [wIndex]);
+ ehci_writel(ehci, temp,
+ &ehci->regs->port_status [wIndex]);
break;
default:
goto error;
}
- readl (&ehci->regs->command); /* unblock posted writes */
+ ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
break;
default: