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usb: hcd: add generic PHY support

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Add the generic PHY support, analogous to the USB PHY support. Intended it to be
used with the PCI EHCI/OHCI drivers and the xHCI platform driver.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sergei Shtylyov 2014-09-24 23:09:44 +04:00 committed by Greg Kroah-Hartman
parent 3d46e73dfd
commit 0043325495
2 changed files with 41 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/usb/core/hcd.c
View File

@ -42,6 +42,7 @@
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/phy/phy.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/phy.h>
@ -2647,6 +2648,29 @@ int usb_add_hcd(struct usb_hcd *hcd,
}
}
if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
struct phy *phy = phy_get(hcd->self.controller, "usb");
if (IS_ERR(phy)) {
retval = PTR_ERR(phy);
if (retval == -EPROBE_DEFER)
goto err_phy;
} else {
retval = phy_init(phy);
if (retval) {
phy_put(phy);
goto err_phy;
}
retval = phy_power_on(phy);
if (retval) {
phy_exit(phy);
phy_put(phy);
goto err_phy;
}
hcd->phy = phy;
}
}
dev_info(hcd->self.controller, "%s\n", hcd->product_desc);
/* Keep old behaviour if authorized_default is not in [0, 1]. */
@ -2662,7 +2686,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
*/
if ((retval = hcd_buffer_create(hcd)) != 0) {
dev_dbg(hcd->self.controller, "pool alloc failed\n");
goto err_remove_phy;
goto err_create_buf;
}
if ((retval = usb_register_bus(&hcd->self)) < 0)
@ -2789,7 +2813,14 @@ err_allocate_root_hub:
usb_deregister_bus(&hcd->self);
err_register_bus:
hcd_buffer_destroy(hcd);
err_remove_phy:
err_create_buf:
if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->phy) {
phy_power_off(hcd->phy);
phy_exit(hcd->phy);
phy_put(hcd->phy);
hcd->phy = NULL;
}
err_phy:
if (hcd->remove_phy && hcd->usb_phy) {
usb_phy_shutdown(hcd->usb_phy);
usb_put_phy(hcd->usb_phy);
@ -2866,6 +2897,13 @@ void usb_remove_hcd(struct usb_hcd *hcd)
usb_deregister_bus(&hcd->self);
hcd_buffer_destroy(hcd);
if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->phy) {
phy_power_off(hcd->phy);
phy_exit(hcd->phy);
phy_put(hcd->phy);
hcd->phy = NULL;
}
if (hcd->remove_phy && hcd->usb_phy) {
usb_phy_shutdown(hcd->usb_phy);
usb_put_phy(hcd->usb_phy);

1
include/linux/usb/hcd.h
View File

@ -107,6 +107,7 @@ struct usb_hcd {
* other external phys should be software-transparent
*/
struct usb_phy *usb_phy;
struct phy *phy;
/* Flags that need to be manipulated atomically because they can
* change while the host controller is running. Always use