colibri_vf: Add board_usb_phy_mode function

Add board_usb_phy_mode function for detecting whether a port is
being used as host or client using a GPIO. On Colibri Vybrid we
provide GPIO 102 for this very same purpose.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

diff --git a/board/toradex/colibri_vf/colibri_vf.c b/board/toradex/colibri_vf/colibri_vf.c
index a6d1c5bcd1a315a88df59287ea585f7658ea28a3..c65ccb3fd764c21111e991e3fe8968f0690150e3 100644 (file)
--- a/board/toradex/colibri_vf/colibri_vf.c
+++ b/board/toradex/colibri_vf/colibri_vf.c
@@ -21,6 +21,7 @@
 #include <i2c.h>
 #include <g_dnl.h>
 #include <asm/gpio.h>
+#include <usb.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -34,6 +35,7 @@ DECLARE_GLOBAL_DATA_PTR;
                        PAD_CTL_DSE_50ohm | PAD_CTL_OBE_IBE_ENABLE)
 
 #define USB_PEN_GPIO           83
+#define USB_CDET_GPIO          102
 
 static struct ddrmc_cr_setting colibri_vf_cr_settings[] = {
        /* levelling */
@@ -92,6 +94,7 @@ static struct ddrmc_cr_setting colibri_vf_cr_settings[] = {
 
 static const iomux_v3_cfg_t usb_pads[] = {
        VF610_PAD_PTD4__GPIO_83,
+       VF610_PAD_PTC29__GPIO_102,
 };
 
 int dram_init(void)
@@ -280,7 +283,6 @@ static void setup_iomux_gpio(void)
                VF610_PAD_PTB23__GPIO_93,
                VF610_PAD_PTB26__GPIO_96,
                VF610_PAD_PTB28__GPIO_98,
-               VF610_PAD_PTC29__GPIO_102,
                VF610_PAD_PTC30__GPIO_103,
                VF610_PAD_PTA7__GPIO_134,
        };
@@ -509,6 +511,10 @@ int board_init(void)
 
        setbits_le32(&scsc->sosc_ctr, SCSC_SOSC_CTR_SOSC_EN);
 
+#ifdef CONFIG_USB_EHCI_VF
+       gpio_request(USB_CDET_GPIO, "usb-cdet-gpio");
+#endif
+
        return 0;
 }
 
@@ -554,4 +560,29 @@ int board_ehci_hcd_init(int port)
        }
        return 0;
 }
+
+int board_usb_phy_mode(int port)
+{
+       switch (port) {
+       case 0:
+               /*
+                * Port 0 is used only in client mode on Colibri Vybrid modules
+                * Check for state of USB client gpio pin and accordingly return
+                * USB_INIT_DEVICE or USB_INIT_HOST.
+                */
+               if (gpio_get_value(USB_CDET_GPIO))
+                       return USB_INIT_DEVICE;
+               else
+                       return USB_INIT_HOST;
+       case 1:
+               /* Port 1 is used only in host mode on Colibri Vybrid modules */
+               return USB_INIT_HOST;
+       default:
+               /*
+                * There are only two USB controllers on Vybrid. Ideally we will
+                * not reach here. However return USB_INIT_HOST if we do.
+                */
+               return USB_INIT_HOST;
+       }
+}
 #endif