USB: EHCI: export ehci_handshake for ehci-hcd sub-drivers
In order to split ehci-hcd.c into separate modules, handshake() must be
exported. Rename the symbol to add an ehci_ prefix, to avoid any naming
clashes.
Signed-off-by: Manjunath Goudar <manjunath.goudar@linaro.org>
[swarren, split Manjunath's patches more logically, limit this change
to export just handshake()]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 246e124..e8a6f3d 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -139,7 +139,7 @@
/*-------------------------------------------------------------------------*/
/*
- * handshake - spin reading hc until handshake completes or fails
+ * ehci_handshake - spin reading hc until handshake completes or fails
* @ptr: address of hc register to be read
* @mask: bits to look at in result of read
* @done: value of those bits when handshake succeeds
@@ -155,8 +155,8 @@
* before driver shutdown. But it also seems to be caused by bugs in cardbus
* bridge shutdown: shutting down the bridge before the devices using it.
*/
-static int handshake (struct ehci_hcd *ehci, void __iomem *ptr,
- u32 mask, u32 done, int usec)
+int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
+ u32 mask, u32 done, int usec)
{
u32 result;
@@ -172,6 +172,7 @@
} while (usec > 0);
return -ETIMEDOUT;
}
+EXPORT_SYMBOL_GPL(ehci_handshake);
/* check TDI/ARC silicon is in host mode */
static int tdi_in_host_mode (struct ehci_hcd *ehci)
@@ -212,7 +213,7 @@
spin_unlock_irq(&ehci->lock);
synchronize_irq(ehci_to_hcd(ehci)->irq);
- return handshake(ehci, &ehci->regs->status,
+ return ehci_handshake(ehci, &ehci->regs->status,
STS_HALT, STS_HALT, 16 * 125);
}
@@ -251,7 +252,7 @@
ehci_writel(ehci, command, &ehci->regs->command);
ehci->rh_state = EHCI_RH_HALTED;
ehci->next_statechange = jiffies;
- retval = handshake (ehci, &ehci->regs->command,
+ retval = ehci_handshake(ehci, &ehci->regs->command,
CMD_RESET, 0, 250 * 1000);
if (ehci->has_hostpc) {
@@ -286,7 +287,8 @@
/* wait for any schedule enables/disables to take effect */
temp = (ehci->command << 10) & (STS_ASS | STS_PSS);
- handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp, 16 * 125);
+ ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, temp,
+ 16 * 125);
/* then disable anything that's still active */
spin_lock_irq(&ehci->lock);
@@ -295,7 +297,8 @@
spin_unlock_irq(&ehci->lock);
/* hardware can take 16 microframes to turn off ... */
- handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0, 16 * 125);
+ ehci_handshake(ehci, &ehci->regs->status, STS_ASS | STS_PSS, 0,
+ 16 * 125);
}
/*-------------------------------------------------------------------------*/
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index b2f6450..2b70277 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -892,7 +892,7 @@
PORT_SUSPEND | PORT_RESUME);
ehci_writel(ehci, temp, status_reg);
clear_bit(wIndex, &ehci->resuming_ports);
- retval = handshake(ehci, status_reg,
+ retval = ehci_handshake(ehci, status_reg,
PORT_RESUME, 0, 2000 /* 2msec */);
if (retval != 0) {
ehci_err(ehci,
@@ -918,7 +918,7 @@
/* REVISIT: some hardware needs 550+ usec to clear
* this bit; seems too long to spin routinely...
*/
- retval = handshake(ehci, status_reg,
+ retval = ehci_handshake(ehci, status_reg,
PORT_RESET, 0, 1000);
if (retval != 0) {
ehci_err (ehci, "port %d reset error %d\n",
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 8390c87..289b9b8 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -179,7 +179,7 @@
* If a transaction is in progress, there may be a delay in
* suspending the port. Poll until the port is suspended.
*/
- if (handshake(ehci, status_reg, PORT_SUSPEND,
+ if (ehci_handshake(ehci, status_reg, PORT_SUSPEND,
PORT_SUSPEND, 5000))
pr_err("%s: timeout waiting for SUSPEND\n", __func__);
@@ -227,9 +227,9 @@
spin_lock_irqsave(&ehci->lock, flags);
/* Poll until the controller clears RESUME and SUSPEND */
- if (handshake(ehci, status_reg, PORT_RESUME, 0, 2000))
+ if (ehci_handshake(ehci, status_reg, PORT_RESUME, 0, 2000))
pr_err("%s: timeout waiting for RESUME\n", __func__);
- if (handshake(ehci, status_reg, PORT_SUSPEND, 0, 2000))
+ if (ehci_handshake(ehci, status_reg, PORT_SUSPEND, 0, 2000))
pr_err("%s: timeout waiting for SUSPEND\n", __func__);
ehci->reset_done[wIndex-1] = 0;
@@ -511,14 +511,14 @@
}
/* Poll until CCS is enabled */
- if (handshake(ehci, &hw->port_status[0], PORT_CONNECT,
+ if (ehci_handshake(ehci, &hw->port_status[0], PORT_CONNECT,
PORT_CONNECT, 2000)) {
pr_err("%s: timeout waiting for PORT_CONNECT\n", __func__);
goto restart;
}
/* Poll until PE is enabled */
- if (handshake(ehci, &hw->port_status[0], PORT_PE,
+ if (ehci_handshake(ehci, &hw->port_status[0], PORT_PE,
PORT_PE, 2000)) {
pr_err("%s: timeout waiting for USB_PORTSC1_PE\n", __func__);
goto restart;
@@ -536,7 +536,7 @@
writel(val, &hw->port_status[0]);
/* Wait until port suspend completes */
- if (handshake(ehci, &hw->port_status[0], PORT_SUSPEND,
+ if (ehci_handshake(ehci, &hw->port_status[0], PORT_SUSPEND,
PORT_SUSPEND, 1000)) {
pr_err("%s: timeout waiting for PORT_SUSPEND\n",
__func__);
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 7c978b2..64f9a08 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -800,6 +800,8 @@
extern void ehci_init_driver(struct hc_driver *drv,
const struct ehci_driver_overrides *over);
extern int ehci_setup(struct usb_hcd *hcd);
+extern int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
+ u32 mask, u32 done, int usec);
#ifdef CONFIG_PM
extern int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);