diff options
| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2009-10-30 23:52:04 +0400 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-11-25 10:21:34 -0800 |
| commit | ca6a272a4f1c2b81ec062f39cdc02ce7aed26d14 (patch) | |
| tree | daa0eab08393f8782f4d4e63cca2212e67451039 /arch/arm/mach-davinci | |
| parent | b0ea26e1c8970c1b252a43e6c33555829ba4b0d2 (diff) | |
| download | lwn-ca6a272a4f1c2b81ec062f39cdc02ce7aed26d14.tar.gz lwn-ca6a272a4f1c2b81ec062f39cdc02ce7aed26d14.zip | |
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: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci')
| -rw-r--r-- | arch/arm/mach-davinci/board-da830-evm.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index bfa790297f79..ccf66c755a7f 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -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", |