Signed-off-by: Jan Luebbe <[email protected]> --- arch/arm/mach-davinci/Makefile | 1 + arch/arm/mach-davinci/include/mach/usb.h | 37 +++++++++++++++++ arch/arm/mach-davinci/usb.c | 66 ++++++++++++++++++++++++++++++ 3 files changed, 104 insertions(+) create mode 100644 arch/arm/mach-davinci/include/mach/usb.h create mode 100644 arch/arm/mach-davinci/usb.c
diff --git a/arch/arm/mach-davinci/Makefile b/arch/arm/mach-davinci/Makefile index 0ac8f9b..0df1e92 100644 --- a/arch/arm/mach-davinci/Makefile +++ b/arch/arm/mach-davinci/Makefile @@ -4,3 +4,4 @@ obj-y += da850.o obj-y += gpio.o obj-y += mux.o obj-y += psc.o +obj-y += usb.o diff --git a/arch/arm/mach-davinci/include/mach/usb.h b/arch/arm/mach-davinci/include/mach/usb.h new file mode 100644 index 0000000..d0fb412 --- /dev/null +++ b/arch/arm/mach-davinci/include/mach/usb.h @@ -0,0 +1,37 @@ +/* + * USB related definitions + * + * Copyright (C) 2009 MontaVista Software, Inc. <[email protected]> + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#ifndef __ASM_ARCH_USB_H +#define __ASM_ARCH_USB_H + +/* DA8xx CFGCHIP2 (USB 2.0 PHY Control) register bits */ +#define CFGCHIP2_PHYCLKGD (1 << 17) +#define CFGCHIP2_VBUSSENSE (1 << 16) +#define CFGCHIP2_RESET (1 << 15) +#define CFGCHIP2_OTGMODE (3 << 13) +#define CFGCHIP2_NO_OVERRIDE (0 << 13) +#define CFGCHIP2_FORCE_HOST (1 << 13) +#define CFGCHIP2_FORCE_DEVICE (2 << 13) +#define CFGCHIP2_FORCE_HOST_VBUS_LOW (3 << 13) +#define CFGCHIP2_USB1PHYCLKMUX (1 << 12) +#define CFGCHIP2_USB2PHYCLKMUX (1 << 11) +#define CFGCHIP2_PHYPWRDN (1 << 10) +#define CFGCHIP2_OTGPWRDN (1 << 9) +#define CFGCHIP2_DATPOL (1 << 8) +#define CFGCHIP2_USB1SUSPENDM (1 << 7) +#define CFGCHIP2_PHY_PLLON (1 << 6) /* override PLL suspend */ +#define CFGCHIP2_SESENDEN (1 << 5) /* Vsess_end comparator */ +#define CFGCHIP2_VBDTCTEN (1 << 4) /* Vbus comparator */ +#define CFGCHIP2_REFFREQ (0xf << 0) +#define CFGCHIP2_REFFREQ_12MHZ (1 << 0) +#define CFGCHIP2_REFFREQ_24MHZ (2 << 0) +#define CFGCHIP2_REFFREQ_48MHZ (3 << 0) + +#endif /* ifndef __ASM_ARCH_USB_H */ diff --git a/arch/arm/mach-davinci/usb.c b/arch/arm/mach-davinci/usb.c new file mode 100644 index 0000000..43dcd37 --- /dev/null +++ b/arch/arm/mach-davinci/usb.c @@ -0,0 +1,66 @@ +#include <common.h> +#include <console.h> +#include <driver.h> +#include <init.h> +#include <io.h> +#include <mach/hardware.h> +#include <mach/usb.h> +#include <mach/da8xx.h> + +#define DA8XX_USB0_BASE 0x01e00000 +#define DA8XX_USB1_BASE 0x01e25000 + +static int da8xx_usb11_init(void) +{ + u32 cfgchip2; + + lpsc_on(DAVINCI_LPSC_USB20); + lpsc_on(DAVINCI_LPSC_USB11); + + /* + * Set up USB clock/mode in the CFGCHIP2 register. + * FYI: CFGCHIP2 is 0x0000ef00 initially. + */ + cfgchip2 = readl(DA8XX_SYSCFG0_BASE + DA8XX_CFGCHIP2_REG); + + /* USB2.0 PHY reference clock is 24 MHz */ + cfgchip2 &= ~CFGCHIP2_REFFREQ; + cfgchip2 |= CFGCHIP2_REFFREQ_24MHZ; + + /* + * Select internal reference clock for USB 2.0 PHY + * and use it as a clock source for USB 1.1 PHY + * (this is the default setting anyway). + */ + 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; + cfgchip2 |= CFGCHIP2_FORCE_HOST; + + cfgchip2 &= ~(CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN); + cfgchip2 |= CFGCHIP2_PHY_PLLON; + + /* + * Enable USB 1.1 PHY + */ + cfgchip2 |= CFGCHIP2_USB1SUSPENDM; + + writel(cfgchip2, DA8XX_SYSCFG0_BASE + DA8XX_CFGCHIP2_REG); + + printf("waiting for USB PHY clock...\n"); + while (!(readl(DA8XX_SYSCFG0_BASE + DA8XX_CFGCHIP2_REG) & CFGCHIP2_PHYCLKGD)) + continue; + + add_generic_device("ohci", 0, NULL, DA8XX_USB1_BASE, 0x100, + IORESOURCE_MEM, NULL); + return 0; +} + +device_initcall(da8xx_usb11_init); -- 1.7.10 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
