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 a6d1c5b..c65ccb3 100644
--- 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 @@
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 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 @@
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 @@
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 @@
}
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