From c9c5e52d44b3e68effcda4bef4ff23c6be0c001c Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Thu, 18 Dec 2008 19:37:31 +0300 Subject: powerpc/83xx: Add USB Host/Gadget support for MPC8360E-MDS boards - Update the device tree per QE USB bindings; - Add timer (FSL GTM) node; - Add gpio-controller node for BCSR13 bank (GPIOs on that bank are used to control the USB transceiver); - Set up other BCSR registers; - Configure the QE Par IO. The work is loosely based on Li Yang's patch[1], which was used to support peripheral mode only. [1] http://ozlabs.org/pipermail/linuxppc-dev/2008-August/061357.html The s-o-b line of the original patch preserved here. Signed-off-by: Li Yang Signed-off-by: Anton Vorontsov Signed-off-by: Kumar Gala --- arch/powerpc/platforms/83xx/mpc836x_mds.c | 75 +++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) (limited to 'arch/powerpc/platforms') diff --git a/arch/powerpc/platforms/83xx/mpc836x_mds.c b/arch/powerpc/platforms/83xx/mpc836x_mds.c index c0a09c34956..09e9d6fb741 100644 --- a/arch/powerpc/platforms/83xx/mpc836x_mds.c +++ b/arch/powerpc/platforms/83xx/mpc836x_mds.c @@ -44,6 +44,7 @@ #include #include #include +#include #include #include @@ -93,6 +94,16 @@ static void __init mpc836x_mds_setup_arch(void) for (np = NULL; (np = of_find_node_by_name(np, "ucc")) != NULL;) par_io_of_config(np); +#ifdef CONFIG_QE_USB + /* Must fixup Par IO before QE GPIO chips are registered. */ + par_io_config_pin(1, 2, 1, 0, 3, 0); /* USBOE */ + par_io_config_pin(1, 3, 1, 0, 3, 0); /* USBTP */ + par_io_config_pin(1, 8, 1, 0, 1, 0); /* USBTN */ + par_io_config_pin(1, 10, 2, 0, 3, 0); /* USBRXD */ + par_io_config_pin(1, 9, 2, 1, 3, 0); /* USBRP */ + par_io_config_pin(1, 11, 2, 1, 3, 0); /* USBRN */ + par_io_config_pin(2, 20, 2, 0, 1, 0); /* CLK21 */ +#endif /* CONFIG_QE_USB */ } if ((np = of_find_compatible_node(NULL, "network", "ucc_geth")) @@ -151,6 +162,70 @@ static int __init mpc836x_declare_of_platform_devices(void) } machine_device_initcall(mpc836x_mds, mpc836x_declare_of_platform_devices); +#ifdef CONFIG_QE_USB +static int __init mpc836x_usb_cfg(void) +{ + u8 __iomem *bcsr; + struct device_node *np; + const char *mode; + int ret = 0; + + np = of_find_compatible_node(NULL, NULL, "fsl,mpc8360mds-bcsr"); + if (!np) + return -ENODEV; + + bcsr = of_iomap(np, 0); + of_node_put(np); + if (!bcsr) + return -ENOMEM; + + np = of_find_compatible_node(NULL, NULL, "fsl,mpc8323-qe-usb"); + if (!np) { + ret = -ENODEV; + goto err; + } + +#define BCSR8_TSEC1M_MASK (0x3 << 6) +#define BCSR8_TSEC1M_RGMII (0x0 << 6) +#define BCSR8_TSEC2M_MASK (0x3 << 4) +#define BCSR8_TSEC2M_RGMII (0x0 << 4) + /* + * Default is GMII (2), but we should set it to RGMII (0) if we use + * USB (Eth PHY is in RGMII mode anyway). + */ + clrsetbits_8(&bcsr[8], BCSR8_TSEC1M_MASK | BCSR8_TSEC2M_MASK, + BCSR8_TSEC1M_RGMII | BCSR8_TSEC2M_RGMII); + +#define BCSR13_USBMASK 0x0f +#define BCSR13_nUSBEN 0x08 /* 1 - Disable, 0 - Enable */ +#define BCSR13_USBSPEED 0x04 /* 1 - Full, 0 - Low */ +#define BCSR13_USBMODE 0x02 /* 1 - Host, 0 - Function */ +#define BCSR13_nUSBVCC 0x01 /* 1 - gets VBUS, 0 - supplies VBUS */ + + clrsetbits_8(&bcsr[13], BCSR13_USBMASK, BCSR13_USBSPEED); + + mode = of_get_property(np, "mode", NULL); + if (mode && !strcmp(mode, "peripheral")) { + setbits8(&bcsr[13], BCSR13_nUSBVCC); + qe_usb_clock_set(QE_CLK21, 48000000); + } else { + setbits8(&bcsr[13], BCSR13_USBMODE); + /* + * The BCSR GPIOs are used to control power and + * speed of the USB transceiver. This is needed for + * the USB Host only. + */ + simple_gpiochip_init("fsl,mpc8360mds-bcsr-gpio"); + } + + of_node_put(np); +err: + iounmap(bcsr); + return ret; +} +machine_arch_initcall(mpc836x_mds, mpc836x_usb_cfg); +#endif /* CONFIG_QE_USB */ + static void __init mpc836x_mds_init_IRQ(void) { struct device_node *np; -- cgit v1.2.3-70-g09d2