davinci: USB1.1 support for Omapl138-Hawkboard

This patch adds USB1.1 support for the Hawkboard-L138 system

Signed-off-by: Victor Rodriguez <vm.rod25@gmail.com>
Tested-by: Rene Gonzalez <renegs.2378@gmail.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

1 files changed, 115 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-omapl138-hawk.c b/arch/arm/mach-davinci/board-omapl138-hawk.c
index eeb1cad02503..67c38d0ecd10 100644
--- a/arch/arm/mach-davinci/board-omapl138-hawk.c
+++ b/arch/arm/mach-davinci/board-omapl138-hawk.c
@@ -25,6 +25,9 @@
 #define DA850_HAWK_MMCSD_CD_PIN         GPIO_TO_PIN(3, 12)
 #define DA850_HAWK_MMCSD_WP_PIN         GPIO_TO_PIN(3, 13)
 
+#define DA850_USB1_VBUS_PIN             GPIO_TO_PIN(2, 4)
+#define DA850_USB1_OC_PIN               GPIO_TO_PIN(6, 13)
+
 static short omapl138_hawk_mii_pins[] __initdata = {
         DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
         DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
@@ -180,6 +183,116 @@ mmc_setup_wp_fail:
         gpio_free(DA850_HAWK_MMCSD_CD_PIN);
 }
 
+static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id);
+static da8xx_ocic_handler_t hawk_usb_ocic_handler;
+
+static const short da850_hawk_usb11_pins[] = {
+        DA850_GPIO2_4, DA850_GPIO6_13,
+        -1
+};
+
+static int hawk_usb_set_power(unsigned port, int on)
+{
+        gpio_set_value(DA850_USB1_VBUS_PIN, on);
+        return 0;
+}
+
+static int hawk_usb_get_power(unsigned port)
+{
+        return gpio_get_value(DA850_USB1_VBUS_PIN);
+}
+
+static int hawk_usb_get_oci(unsigned port)
+{
+        return !gpio_get_value(DA850_USB1_OC_PIN);
+}
+
+static int hawk_usb_ocic_notify(da8xx_ocic_handler_t handler)
+{
+        int irq         = gpio_to_irq(DA850_USB1_OC_PIN);
+        int error       = 0;
+
+        if (handler != NULL) {
+                hawk_usb_ocic_handler = handler;
+
+                error = request_irq(irq, omapl138_hawk_usb_ocic_irq,
+                                        IRQF_DISABLED | IRQF_TRIGGER_RISING |
+                                        IRQF_TRIGGER_FALLING,
+                                        "OHCI over-current indicator", NULL);
+                if (error)
+                        pr_err("%s: could not request IRQ to watch "
+                                "over-current indicator changes\n", __func__);
+        } else {
+                free_irq(irq, NULL);
+        }
+        return error;
+}
+
+static struct da8xx_ohci_root_hub omapl138_hawk_usb11_pdata = {
+        .set_power      = hawk_usb_set_power,
+        .get_power      = hawk_usb_get_power,
+        .get_oci        = hawk_usb_get_oci,
+        .ocic_notify    = hawk_usb_ocic_notify,
+        /* TPS2087 switch @ 5V */
+        .potpgt         = (3 + 1) / 2,  /* 3 ms max */
+};
+
+static irqreturn_t omapl138_hawk_usb_ocic_irq(int irq, void *dev_id)
+{
+        hawk_usb_ocic_handler(&omapl138_hawk_usb11_pdata, 1);
+        return IRQ_HANDLED;
+}
+
+static __init void omapl138_hawk_usb_init(void)
+{
+        int ret;
+        u32 cfgchip2;
+
+        ret = davinci_cfg_reg_list(da850_hawk_usb11_pins);
+        if (ret) {
+                pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
+                        __func__, ret);
+                return;
+        }
+
+        /* Setup the Ref. clock frequency for the HAWK at 24 MHz. */
+
+        cfgchip2 = __raw_readl(DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
+        cfgchip2 &= ~CFGCHIP2_REFFREQ;
+        cfgchip2 |=  CFGCHIP2_REFFREQ_24MHZ;
+        __raw_writel(cfgchip2, DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG));
+
+        ret = gpio_request_one(DA850_USB1_VBUS_PIN,
+                        GPIOF_DIR_OUT, "USB1 VBUS");
+        if (ret < 0) {
+                pr_err("%s: failed to request GPIO for USB 1.1 port "
+                        "power control: %d\n", __func__, ret);
+                return;
+        }
+
+        ret = gpio_request_one(DA850_USB1_OC_PIN,
+                        GPIOF_DIR_IN, "USB1 OC");
+        if (ret < 0) {
+                pr_err("%s: failed to request GPIO for USB 1.1 port "
+                        "over-current indicator: %d\n", __func__, ret);
+                goto usb11_setup_oc_fail;
+        }
+
+        ret = da8xx_register_usb11(&omapl138_hawk_usb11_pdata);
+        if (ret) {
+                pr_warning("%s: USB 1.1 registration failed: %d\n",
+                        __func__, ret);
+                goto usb11_setup_fail;
+        }
+
+        return;
+
+usb11_setup_fail:
+        gpio_free(DA850_USB1_OC_PIN);
+usb11_setup_oc_fail:
+        gpio_free(DA850_USB1_VBUS_PIN);
+}
+
 static struct davinci_uart_config omapl138_hawk_uart_config __initdata = {
         .enabled_uarts = 0x7,
 };
@@ -199,6 +312,8 @@ static __init void omapl138_hawk_init(void)
 
         omapl138_hawk_mmc_init();
 
+        omapl138_hawk_usb_init();
+
         ret = da8xx_register_watchdog();
         if (ret)
                 pr_warning("omapl138_hawk_init: "