usb: chipidea: add support to the generic PHY framework
This patch adds support of the PHY framework for ChipIdea drivers.
Changes are done in both the ChipIdea common code and in the drivers
accessing the PHY. This is done by adding a new PHY member in
ChipIdea's structures and by taking care of it in the code.
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h
index 9015139..5bbfcc7 100644
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -161,7 +161,8 @@
* @test_mode: the selected test mode
* @platdata: platform specific information supplied by parent device
* @vbus_active: is VBUS active
- * @usb_phy: pointer to USB PHY, if any
+ * @phy: pointer to PHY, if any
+ * @usb_phy: pointer to USB PHY, if any and if using the USB PHY framework
* @hcd: pointer to usb_hcd for ehci host driver
* @debugfs: root dentry for this controller in debugfs
* @id_event: indicates there is an id event, and handled at ci_otg_work
@@ -202,6 +203,8 @@
struct ci_hdrc_platform_data *platdata;
int vbus_active;
+ struct phy *phy;
+ /* old usb_phy interface */
struct usb_phy *usb_phy;
struct usb_hcd *hcd;
struct dentry *debugfs;
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 30f8942..60578d9 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -47,6 +47,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
+#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/idr.h>
@@ -299,6 +300,49 @@
}
/**
+ * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy
+ * interfaces
+ * @ci: the controller
+ *
+ * This function returns an error code if the phy failed to init
+ */
+static int _ci_usb_phy_init(struct ci_hdrc *ci)
+{
+ int ret;
+
+ if (ci->phy) {
+ ret = phy_init(ci->phy);
+ if (ret)
+ return ret;
+
+ ret = phy_power_on(ci->phy);
+ if (ret) {
+ phy_exit(ci->phy);
+ return ret;
+ }
+ } else {
+ ret = usb_phy_init(ci->usb_phy);
+ }
+
+ return ret;
+}
+
+/**
+ * _ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy
+ * interfaces
+ * @ci: the controller
+ */
+static void ci_usb_phy_exit(struct ci_hdrc *ci)
+{
+ if (ci->phy) {
+ phy_power_off(ci->phy);
+ phy_exit(ci->phy);
+ } else {
+ usb_phy_shutdown(ci->usb_phy);
+ }
+}
+
+/**
* ci_usb_phy_init: initialize phy according to different phy type
* @ci: the controller
*
@@ -312,7 +356,7 @@
case USBPHY_INTERFACE_MODE_UTMI:
case USBPHY_INTERFACE_MODE_UTMIW:
case USBPHY_INTERFACE_MODE_HSIC:
- ret = usb_phy_init(ci->usb_phy);
+ ret = _ci_usb_phy_init(ci);
if (ret)
return ret;
hw_phymode_configure(ci);
@@ -320,12 +364,12 @@
case USBPHY_INTERFACE_MODE_ULPI:
case USBPHY_INTERFACE_MODE_SERIAL:
hw_phymode_configure(ci);
- ret = usb_phy_init(ci->usb_phy);
+ ret = _ci_usb_phy_init(ci);
if (ret)
return ret;
break;
default:
- ret = usb_phy_init(ci->usb_phy);
+ ret = _ci_usb_phy_init(ci);
}
return ret;
@@ -605,23 +649,26 @@
return -ENODEV;
}
- if (ci->platdata->usb_phy)
+ if (ci->platdata->phy) {
+ ci->phy = ci->platdata->phy;
+ } else if (ci->platdata->usb_phy) {
ci->usb_phy = ci->platdata->usb_phy;
- else
+ } else {
+ ci->phy = devm_phy_get(dev, "usb-phy");
ci->usb_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
- if (IS_ERR(ci->usb_phy)) {
- ret = PTR_ERR(ci->usb_phy);
- /*
- * if -ENXIO is returned, it means PHY layer wasn't
- * enabled, so it makes no sense to return -EPROBE_DEFER
- * in that case, since no PHY driver will ever probe.
- */
- if (ret == -ENXIO)
- return ret;
+ /* if both generic PHY and USB PHY layers aren't enabled */
+ if (PTR_ERR(ci->phy) == -ENOSYS &&
+ PTR_ERR(ci->usb_phy) == -ENXIO)
+ return -ENXIO;
- dev_err(dev, "no usb2 phy configured\n");
- return -EPROBE_DEFER;
+ if (IS_ERR(ci->phy) && IS_ERR(ci->usb_phy))
+ return -EPROBE_DEFER;
+
+ if (IS_ERR(ci->phy))
+ ci->phy = NULL;
+ else if (IS_ERR(ci->usb_phy))
+ ci->usb_phy = NULL;
}
ret = ci_usb_phy_init(ci);
@@ -728,7 +775,7 @@
stop:
ci_role_destroy(ci);
deinit_phy:
- usb_phy_shutdown(ci->usb_phy);
+ ci_usb_phy_exit(ci);
return ret;
}
@@ -741,7 +788,7 @@
free_irq(ci->irq, ci);
ci_role_destroy(ci);
ci_hdrc_enter_lpm(ci, true);
- usb_phy_shutdown(ci->usb_phy);
+ ci_usb_phy_exit(ci);
return 0;
}
diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 789809f..4f8eb40 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -59,8 +59,11 @@
hcd->has_tt = 1;
hcd->power_budget = ci->platdata->power_budget;
- hcd->usb_phy = ci->usb_phy;
hcd->tpl_support = ci->platdata->tpl_support;
+ if (ci->phy)
+ hcd->phy = ci->phy;
+ else
+ hcd->usb_phy = ci->usb_phy;
ehci = hcd_to_ehci(hcd);
ehci->caps = ci->hw_bank.cap;
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
index 862d7cb..3c2ab1a 100644
--- a/drivers/usb/chipidea/otg_fsm.c
+++ b/drivers/usb/chipidea/otg_fsm.c
@@ -779,7 +779,11 @@
{
int retval = 0;
- ci->otg.usb_phy = ci->usb_phy;
+ if (ci->phy)
+ ci->otg.phy = ci->phy;
+ else
+ ci->otg.usb_phy = ci->usb_phy;
+
ci->otg.gadget = &ci->gadget;
ci->fsm.otg = &ci->otg;
ci->fsm.power_up = 1;
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index 4fe161a..c01bf4e 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -13,6 +13,8 @@
/* offset of the capability registers */
uintptr_t capoffset;
unsigned power_budget;
+ struct phy *phy;
+ /* old usb_phy interface */
struct usb_phy *usb_phy;
enum usb_phy_interface phy_mode;
unsigned long flags;