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 9015139a802781cf3521c75da2b449583d7628bf..5bbfcc73cf7006e5e270365dfc7b91826093438c 100644 (file)
--- a/drivers/usb/chipidea/ci.h
+++ b/drivers/usb/chipidea/ci.h
@@ -161,7 +161,8 @@ struct hw_bank {
  * @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 {
 
        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 30f89426bf0528ed49cd5c41428359bc23245207..60578d9c896d45df8f7aac2c365b7a1d4eae2111 100644 (file)
--- 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>
@@ -298,6 +299,49 @@ static void hw_phymode_configure(struct ci_hdrc *ci)
        }
 }
 
+/**
+ * _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 @@ static int ci_usb_phy_init(struct ci_hdrc *ci)
        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 @@ static int ci_usb_phy_init(struct ci_hdrc *ci)
        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 @@ static int ci_hdrc_probe(struct platform_device *pdev)
                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;
+
+               if (IS_ERR(ci->phy) && IS_ERR(ci->usb_phy))
+                       return -EPROBE_DEFER;
 
-               dev_err(dev, "no usb2 phy configured\n");
-               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 @@ static int ci_hdrc_probe(struct platform_device *pdev)
 stop:
        ci_role_destroy(ci);
 deinit_phy:
-       usb_phy_shutdown(ci->usb_phy);
+       ci_usb_phy_exit(ci);
 
        return ret;
 }
@@ -741,7 +788,7 @@ static int ci_hdrc_remove(struct platform_device *pdev)
        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 789809f680aa1b3229f68c166fbb2ba2dd6066bb..4f8eb40ad93a2c7fdc8d53d190970ecfa4f768cb 100644 (file)
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -59,8 +59,11 @@ static int host_start(struct ci_hdrc *ci)
        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 862d7cb01b9250ab3f46489e7b23ad7cc7f0a817..3c2ab1ae00fca6a5c6ae2d5b27ea2b2b8e679606 100644 (file)
--- a/drivers/usb/chipidea/otg_fsm.c
+++ b/drivers/usb/chipidea/otg_fsm.c
@@ -779,7 +779,11 @@ int ci_hdrc_otg_fsm_init(struct ci_hdrc *ci)
 {
        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 4fe161a84c7dc36c76e98a5dc781f819cb2d97d5..c01bf4ea27b9be881c19f9f6e086ece61f7491c3 100644 (file)
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -13,6 +13,8 @@ struct ci_hdrc_platform_data {
        /* 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;