On this board the OHCI port's power control and over-current signals from
TPS2065 power switch are connected via GPIO2[4] and GPIO6[13] respectively,
so we can implement the DA8xx OHCI glue layer's hooks for overriding the
root hub port's power and over-current status bits.
We also have to properly set up the clocking mode in the CFGCHIP2 register,
so that internal 24 MHz reference clock is fed to the USB 2.0 (MUSB) PHY and
its output is used to clock the USB 1.1 (OHCI) PHY...
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
Signed-off-by: Manjunathappa, Prakash <prakash.pm@xxxxxx>
---
arch/arm/mach-davinci/board-da850-evm.c | 62 +++++++++++++++++++++++++++++++
1 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
index d508890..178d178 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -43,6 +43,7 @@
#include <mach/mux.h>
#include <mach/aemif.h>
#include <mach/spi.h>
+#include <mach/usb.h>
#define DA850_EVM_PHY_ID "davinci_mdio-0:00"
#define DA850_LCD_PWR_PIN GPIO_TO_PIN(2, 8)
@@ -734,6 +735,65 @@ static struct davinci_i2c_platform_data da850_evm_i2c_0_pdata = {
.bus_delay = 0, /* usec */
};
+/*
+ * USB1 VBUS is controlled by GPIO2[4], over-current is reported on GPIO6[13].
+ */
+#define ON_BD_USB_DRV GPIO_TO_PIN(2, 4)
+#define ON_BD_USB_OVC GPIO_TO_PIN(6, 13)
+
+static const short da850_evm_usb11_pins[] = {
+ DA850_GPIO2_4, DA850_GPIO6_13,
+ -1
+};
+
+static irqreturn_t da850_evm_usb_ocic_irq(int, void *);
+
+static struct da8xx_ohci_root_hub da850_evm_usb11_pdata = {
+ .type = GPIO_BASED,
+ .method = {
+ .gpio_method = {
+ .power_control_pin = ON_BD_USB_DRV,
+ .over_current_indicator = ON_BD_USB_OVC,
+ },
+ },
+ .board_ocic_handler = da850_evm_usb_ocic_irq,
+};
+
+static irqreturn_t da850_evm_usb_ocic_irq(int irq, void *handler)
+{
+ if (handler != NULL)
+ ((da8xx_ocic_handler_t)handler)(&da850_evm_usb11_pdata, 1);
+ return IRQ_HANDLED;
+}
+
+static __init void da850_evm_usb_init(void)
+{
+ u32 cfgchip2;
+
+ /*
+ * Set up USB clock/mode in the CFGCHIP2 register.
+ * FYI: CFGCHIP2 is 0x0000ef00 initially.
+ */
+ cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
+
+ /* USB2.0 PHY reference clock is 24 MHz */
+ cfgchip2 &= ~CFGCHIP2_REFFREQ;
+ cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ;
+
+ /*
+ * Select internal reference clock for USB 2.0 PHY
+ * and use it as a clock source for USB 1.1 PHY
+ * (this is the default setting anyway).
+ */
+ cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX;
+ cfgchip2 |= CFGCHIP2_USB2PHYCLKMUX;
+
+ __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
+
+ /* initilaize usb module */
+ da8xx_board_usb_init(da850_evm_usb11_pins, &da850_evm_usb11_pdata);
+}
+
static struct davinci_uart_config da850_evm_uart_config __initdata = {
.enabled_uarts = 0x7,
};
@@ -1386,6 +1446,8 @@ static __init void da850_evm_init(void)
ret);
da850_evm_setup_mac_addr();
+
+ da850_evm_usb_init();
}
#ifdef CONFIG_SERIAL_8250_CONSOLE
--
1.7.1
--
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