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DA830 EVM: MUSB platform code

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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@ru.mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Sergei Shtylyov 2009-10-30 23:52:04 +04:00 committed by Kevin Hilman
parent b0ea26e1c8
commit ca6a272a4f
1 changed files with 29 additions and 0 deletions
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29
arch/arm/mach-davinci/board-da830-evm.c
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@ -171,8 +171,37 @@ static __init void da830_evm_usb_init(void)
cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX; cfgchip2 &= ~CFGCHIP2_USB1PHYCLKMUX;
cfgchip2 |= CFGCHIP2_USB2PHYCLKMUX; 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)); __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); ret = da8xx_pinmux_setup(da830_evm_usb11_pins);
if (ret) { if (ret) {
pr_warning("%s: USB 1.1 PinMux setup failed: %d\n", pr_warning("%s: USB 1.1 PinMux setup failed: %d\n",