Commit ca6a272a authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Kevin Hilman
Browse files

DA830 EVM: MUSB platform code 



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: default avatarSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent b0ea26e1

arch/arm/mach-davinci/board-da830-evm.c

+29 −0
Original line number Diff line number Diff line
@@ -171,8 +171,37 @@ static __init void da830_evm_usb_init(void) 
	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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