Properly set up the OTG mode thru the CFGCHIP2 register, enable the
USB0_DRVVBUS pin, and finally register the MUSB platform device.
Signed-off-by: Sergei Shtylyov <sshtylyov@xxxxxxxxxxxxx>
---
The patch is against the recent DaVinci tree. Tested on DA830 EVM.
Changes from the previous version:
- made apply in the updated context...
arch/arm/mach-davinci/board-da830-evm.c | 29 +++++++++++++++++++++++++++++
1 files changed, 29 insertions(+)
Index: linux-davinci/arch/arm/mach-davinci/board-da830-evm.c
===================================================================
--- linux-davinci.orig/arch/arm/mach-davinci/board-da830-evm.c
+++ linux-davinci/arch/arm/mach-davinci/board-da830-evm.c
@@ -178,8 +178,37 @@ static __init void da830_evm_usb_init(vo
cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX;
cfgchip2 |= 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.
+ */
+ cfgchip2 &= ~CFGCHIP2_OTGMODE;
+#ifdef CONFIG_USB_MUSB_HOST
+ cfgchip2 |= CFGCHIP2_FORCE_HOST;
+#else
+ cfgchip2 |= CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN;
+#endif
+
__raw_writel(cfgchip2, DA8XX_SYSCFG_VIRT(DA8XX_CFGCHIP2_REG));
+ /* USB_REFCLKIN is not used. */
+ ret = davinci_cfg_reg(DA830_USB0_DRVVBUS);
+ if (ret)
+ pr_warning("%s: USB 2.0 PinMux setup failed: %d\n",
+ __func__, ret);
+ else {
+ /*
+ * TPS2065 switch @ 5V supplies 1 A (sustains 1.5 A),
+ * with the power on to power good time of 3 ms.
+ */
+ ret = da8xx_register_usb20(1000, 3);
+ if (ret)
+ pr_warning("%s: USB 2.0 registration failed: %d\n",
+ __func__, ret);
+ }
+
ret = da8xx_pinmux_setup(da830_evm_usb11_pins);
if (ret) {
pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",
--
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