As for the da830 and hawk boards, the da850 can provide minimalist usb
1.1 implementation. Moreover, this patch has only been tested with the
OHCI (on an OMAP L138 EVM / DA850 board), not with the Inventra HC
(that seems broken for the DA8XX).
This patch is inspired by the hawk board implementation.
Signed-off-by: Paul Chavent <paul.chav...@onera.fr>
---
arch/arm/mach-davinci/board-da850-evm.c | 153 ++++++++++++++++++++++++++++++++
1 file changed, 153 insertions(+)
diff --git a/arch/arm/mach-davinci/board-da850-evm.c
b/arch/arm/mach-davinci/board-da850-evm.c
index dd1fb24..f0bee9d 100644
--- a/arch/arm/mach-davinci/board-da850-evm.c
+++ b/arch/arm/mach-davinci/board-da850-evm.c
@@ -62,6 +62,9 @@
#define DA850_MII_MDIO_CLKEN_PIN GPIO_TO_PIN(2, 6)
+#define DA850_USB1_VBUS_PIN GPIO_TO_PIN(2, 4)
+#define DA850_USB1_OC_PIN GPIO_TO_PIN(6, 13)
+
static struct mtd_partition da850evm_spiflash_part[] = {
[0] = {
.name = "UBL",
@@ -1431,6 +1434,155 @@ static __init int da850_wl12xx_init(void)
#endif /* CONFIG_DA850_WL12XX */
+#ifdef CONFIG_USB
+
+static irqreturn_t da850_usb_ocic_irq(int irq, void *dev_id);
+static da8xx_ocic_handler_t da850_usb_ocic_handler;
+
+static const short da850_usb11_pins[] = {
+ DA850_GPIO2_4, DA850_GPIO6_13,
+ -1
+};
+
+static int da850_usb_set_power(unsigned port, int on)
+{
+ gpio_set_value(DA850_USB1_VBUS_PIN, on);
+ return 0;
+}
+
+static int da850_usb_get_power(unsigned port)
+{
+ return gpio_get_value(DA850_USB1_VBUS_PIN);
+}
+
+static int da850_usb_get_oci(unsigned port)
+{
+ return !gpio_get_value(DA850_USB1_OC_PIN);
+}
+
+static int da850_usb_ocic_notify(da8xx_ocic_handler_t handler)
+{
+ int irq = gpio_to_irq(DA850_USB1_OC_PIN);
+ int error = 0;
+
+ if (handler != NULL) {
+ da850_usb_ocic_handler = handler;
+
+ error = request_irq(irq, da850_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 da850_usb11_pdata = {
+ .set_power = da850_usb_set_power,
+ .get_power = da850_usb_get_power,
+ .get_oci = da850_usb_get_oci,
+ .ocic_notify = da850_usb_ocic_notify,
+ /* TPS2087 switch @ 5V */
+ .potpgt = (3 + 1) / 2, /* 3 ms max */
+};
+
+static irqreturn_t da850_usb_ocic_irq(int irq, void *dev_id)
+{
+ da850_usb_ocic_handler(&da850_usb11_pdata, 1);
+ return IRQ_HANDLED;
+}
+
+static __init void da850_usb_init(void)
+{
+ void __iomem *cfg_chip2_base;
+ int ret;
+ u32 val;
+
+ /*
+ * Set up USB clock/mode in the CFGCHIP2 register.
+ */
+
+ cfg_chip2_base = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP2_REG);
+
+ val = __raw_readl(cfg_chip2_base);
+
+ /* USB2.0 PHY reference clock is 24 MHz */
+ val &= ~CFGCHIP2_REFFREQ;
+ val |= 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).
+ */
+ val &= ~CFGCHIP2_USB1PHYCLKMUX;
+ val |= CFGCHIP2_USB2PHYCLKMUX;
+
+ /*
+ * We have to override VBUS/ID signals when MUSB is configured into the
+ * host-only mode -- ID pin will float if no cable is connected, so the
+ * controller won't be able to drive VBUS thinking that it's a B-device.
+ * Otherwise, we want to use the OTG mode and enable VBUS comparators.
+ */
+ val &= ~CFGCHIP2_OTGMODE;
+#ifdef CONFIG_USB_MUSB_HOST
+ val |= CFGCHIP2_FORCE_HOST;
+#else
+ val |= CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN;
+#endif
+
+ /* configure the CFGCHIP2 register */
+ __raw_writel(val, cfg_chip2_base);
+
+ ret = davinci_cfg_reg_list(da850_usb11_pins);
+ if (ret) {
+ pr_warn("%s: USB 1.1 PinMux setup failed: %d\n", __func__, ret);
+ return;
+ }
+
+ 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(&da850_usb11_pdata);
+ if (ret) {
+ pr_warn("%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);
+}
+
+#else /* CONFIG_USB */
+
+static __init void da850_usb_init(void)
+{
+ return 0;
+}
+
+#endif /* CONFIG_USB */
+
#define DA850EVM_SATA_REFCLKPN_RATE (100 * 1000 * 1000)
static __init void da850_evm_init(void)
@@ -1453,6 +1605,7 @@ static __init void da850_evm_init(void)
if (ret)
pr_warn("%s: I2C0 registration failed: %d\n", __func__, ret);
+ da850_usb_init();
ret = da8xx_register_watchdog();
if (ret)
--
1.7.12.1
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