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 <leoli@freescale.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

2 files changed, 116 insertions, 2 deletions

diff --git a/arch/powerpc/boot/dts/mpc836x_mds.dts b/arch/powerpc/boot/dts/mpc836x_mds.dts
index 14534d04e4d..6e34f170fa6 100644
--- a/arch/powerpc/boot/dts/mpc836x_mds.dts
+++ b/arch/powerpc/boot/dts/mpc836x_mds.dts
@@ -69,8 +69,18 @@
                 };
 
                 bcsr@1,0 {
+                        #address-cells = <1>;
+                        #size-cells = <1>;
                         compatible = "fsl,mpc8360mds-bcsr";
                         reg = <1 0 0x8000>;
+                        ranges = <0 1 0 0x8000>;
+
+                        bcsr13: gpio-controller@d {
+                                #gpio-cells = <2>;
+                                compatible = "fsl,mpc8360mds-bcsr-gpio";
+                                reg = <0xd 1>;
+                                gpio-controller;
+                        };
                 };
         };
 
@@ -195,10 +205,21 @@
                 };
 
                 par_io@1400 {
+                        #address-cells = <1>;
+                        #size-cells = <1>;
                         reg = <0x1400 0x100>;
+                        ranges = <0 0x1400 0x100>;
                         device_type = "par_io";
                         num-ports = <7>;
 
+                        qe_pio_b: gpio-controller@18 {
+                                #gpio-cells = <2>;
+                                compatible = "fsl,mpc8360-qe-pario-bank",
+                                             "fsl,mpc8323-qe-pario-bank";
+                                reg = <0x18 0x18>;
+                                gpio-controller;
+                        };
+
                         pio1: ucc_pin@01 {
                                 pio-map = <
                         /* port  pin  dir  open_drain  assignment  has_irq */
@@ -282,6 +303,15 @@
                         };
                 };
 
+                timer@440 {
+                        compatible = "fsl,mpc8360-qe-gtm",
+                                     "fsl,qe-gtm", "fsl,gtm";
+                        reg = <0x440 0x40>;
+                        clock-frequency = <132000000>;
+                        interrupts = <12 13 14 15>;
+                        interrupt-parent = <&qeic>;
+                };
+
                 spi@4c0 {
                         cell-index = <0>;
                         compatible = "fsl,spi";
@@ -301,11 +331,20 @@
                 };
 
                 usb@6c0 {
-                        compatible = "qe_udc";
+                        compatible = "fsl,mpc8360-qe-usb",
+                                     "fsl,mpc8323-qe-usb";
                         reg = <0x6c0 0x40 0x8b00 0x100>;
                         interrupts = <11>;
                         interrupt-parent = <&qeic>;
-                        mode = "slave";
+                        fsl,fullspeed-clock = "clk21";
+                        fsl,lowspeed-clock = "brg9";
+                        gpios = <&qe_pio_b  2 0   /* USBOE */
+                                 &qe_pio_b  3 0   /* USBTP */
+                                 &qe_pio_b  8 0   /* USBTN */
+                                 &qe_pio_b  9 0   /* USBRP */
+                                 &qe_pio_b 11 0   /* USBRN */
+                                 &bcsr13    5 0   /* SPEED */
+                                 &bcsr13    4 1>; /* POWER */
                 };
 
                 enet0: ucc@2000 {
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 <asm/udbg.h>
 #include <sysdev/fsl_soc.h>
 #include <sysdev/fsl_pci.h>
+#include <sysdev/simple_gpio.h>
 #include <asm/qe.h>
 #include <asm/qe_ic.h>
 
@@ -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;