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 <[email protected]> --- 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", _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
