omap3evm: ehci: Update EHCI support on OMAP3EVM (Rev >= E)
Added runtime programming for the differences in EHCI interface between
OMAP3EVM revisions (Rev >= E) and (Rev < E).
Changes:
- EHCI PHY reset GPIO pin is 21 on Rev >= E while Rev < E
uses GPIO pin 135.
- Rev >= E uses EHCI Vbus enable GPIO22 line.
- Rev >= E uses GPIO61 to select EHCI port either on main board or
on Mistral Daughter Card (MDC). OMAP3EVM Rev < E doesn't have
EHCI port on main board.
- Currently GPIO61 it programmed to enable EHCI port on main
board only.
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c
index 149d45c..010454f 100644
--- a/arch/arm/mach-omap2/board-omap3evm.c
+++ b/arch/arm/mach-omap2/board-omap3evm.c
@@ -43,6 +43,8 @@
#include "mmc-twl4030.h"
#define OMAP3_EVM_TS_GPIO 175
+#define OMAP3_EVM_EHCI_VBUS 22
+#define OMAP3_EVM_EHCI_SELECT 61
#define OMAP3EVM_ETHR_START 0x2c000000
#define OMAP3EVM_ETHR_SIZE 1024
@@ -347,8 +349,9 @@
.port_mode[2] = EHCI_HCD_OMAP_MODE_UNKNOWN,
.phy_reset = true,
+ /* PHY reset GPIO will be runtime programmed based on EVM version */
.reset_gpio_port[0] = -EINVAL,
- .reset_gpio_port[1] = 135,
+ .reset_gpio_port[1] = -EINVAL,
.reset_gpio_port[2] = -EINVAL
};
@@ -368,9 +371,29 @@
/* OMAP3EVM uses ISP1504 phy and so register nop transceiver */
usb_nop_xceiv_register();
#endif
+ if (get_omap3_evm_rev() >= OMAP3EVM_BOARD_GEN_2) {
+ /* enable EHCI VBUS using GPIO22 */
+ omap_cfg_reg(AF9_34XX_GPIO22);
+ gpio_request(OMAP3_EVM_EHCI_VBUS, "enable EHCI VBUS");
+ gpio_direction_output(OMAP3_EVM_EHCI_VBUS, 0);
+ gpio_set_value(OMAP3_EVM_EHCI_VBUS, 1);
+
+ /* Select EHCI port on main board */
+ omap_cfg_reg(U3_34XX_GPIO61);
+ gpio_request(OMAP3_EVM_EHCI_SELECT, "select EHCI port");
+ gpio_direction_output(OMAP3_EVM_EHCI_SELECT, 0);
+ gpio_set_value(OMAP3_EVM_EHCI_SELECT, 0);
+
+ /* setup EHCI phy reset config */
+ omap_cfg_reg(AH14_34XX_GPIO21);
+ ehci_pdata.reset_gpio_port[1] = 21;
+
+ } else {
+ /* setup EHCI phy reset on MDC */
+ omap_cfg_reg(AF4_34XX_GPIO135_OUT);
+ ehci_pdata.reset_gpio_port[1] = 135;
+ }
usb_musb_init();
- /* Setup EHCI phy reset padconfig */
- omap_cfg_reg(AF4_34XX_GPIO135_OUT);
usb_ehci_init(&ehci_pdata);
ads7846_dev_init();
}