powerpc/44x: PHY fixup for USB on canyonlands board

This fix is a reset for USB PHY that requires some amount of time for power
to be stable on Canyonlands.

Signed-off-by: Rupjyoti Sarmah <rsarmah@apm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

6 files changed, 150 insertions, 2 deletions

diff --git a/arch/powerpc/boot/dts/canyonlands.dts b/arch/powerpc/boot/dts/canyonlands.dts
index 54caec687382..2779f08313a5 100644
--- a/arch/powerpc/boot/dts/canyonlands.dts
+++ b/arch/powerpc/boot/dts/canyonlands.dts
@@ -246,6 +246,11 @@
                                         };
                                 };
 
+                                cpld@2,0 {
+                                        compatible = "amcc,ppc460ex-bcsr";
+                                        reg = <2 0x0 0x9>;
+                                };
+
                                 ndfc@3,0 {
                                         compatible = "ibm,ndfc";
                                         reg = <0x00000003 0x00000000 0x00002000>;
@@ -320,6 +325,12 @@
                                 interrupts = <0x3 0x4>;
                         };
 
+                        GPIO0: gpio@ef600b00 {
+                                compatible = "ibm,ppc4xx-gpio";
+                                reg = <0xef600b00 0x00000048>;
+                                gpio-controller;
+                        };
+
                         ZMII0: emac-zmii@ef600d00 {
                                 compatible = "ibm,zmii-460ex", "ibm,zmii";
                                 reg = <0xef600d00 0x0000000c>;
diff --git a/arch/powerpc/platforms/44x/44x.h b/arch/powerpc/platforms/44x/44x.h
index dbc4d2b4301a..63f703ecd23c 100644
--- a/arch/powerpc/platforms/44x/44x.h
+++ b/arch/powerpc/platforms/44x/44x.h
@@ -4,4 +4,8 @@
 extern u8 as1_readb(volatile u8 __iomem  *addr);
 extern void as1_writeb(u8 data, volatile u8 __iomem *addr);
 
+#define GPIO0_OSRH      0xC
+#define GPIO0_TSRH      0x14
+#define GPIO0_ISR1H     0x34
+
 #endif /* __POWERPC_PLATFORMS_44X_44X_H */
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig
index 0f979c5c756b..f485fc5f6d5e 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -115,7 +115,6 @@ config CANYONLANDS
         bool "Canyonlands"
         depends on 44x
         default n
-        select PPC44x_SIMPLE
         select 460EX
         select PCI
         select PPC4xx_PCI_EXPRESS
diff --git a/arch/powerpc/platforms/44x/Makefile b/arch/powerpc/platforms/44x/Makefile
index c04d16df8488..553db6007217 100644
--- a/arch/powerpc/platforms/44x/Makefile
+++ b/arch/powerpc/platforms/44x/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_WARP)	+= warp.o
 obj-$(CONFIG_XILINX_VIRTEX_5_FXT) += virtex.o
 obj-$(CONFIG_XILINX_ML510) += virtex_ml510.o
 obj-$(CONFIG_ISS4xx)    += iss4xx.o
+obj-$(CONFIG_CANYONLANDS)+= canyonlands.o
diff --git a/arch/powerpc/platforms/44x/canyonlands.c b/arch/powerpc/platforms/44x/canyonlands.c
new file mode 100644
index 000000000000..afc5e8ea3775
--- /dev/null
+++ b/arch/powerpc/platforms/44x/canyonlands.c
@@ -0,0 +1,134 @@
+/*
+ * This contain platform specific code for APM PPC460EX based Canyonlands
+ * board.
+ *
+ * Copyright (c) 2010, Applied Micro Circuits Corporation
+ * Author: Rupjyoti Sarmah <rsarmah@apm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc4xx.h>
+#include <asm/udbg.h>
+#include <asm/uic.h>
+#include <linux/of_platform.h>
+#include <linux/delay.h>
+#include "44x.h"
+
+#define BCSR_USB_EN     0x11
+
+static __initdata struct of_device_id ppc460ex_of_bus[] = {
+        { .compatible = "ibm,plb4", },
+        { .compatible = "ibm,opb", },
+        { .compatible = "ibm,ebc", },
+        { .compatible = "simple-bus", },
+        {},
+};
+
+static int __init ppc460ex_device_probe(void)
+{
+        of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);
+
+        return 0;
+}
+machine_device_initcall(canyonlands, ppc460ex_device_probe);
+
+/* Using this code only for the Canyonlands board.  */
+
+static int __init ppc460ex_probe(void)
+{
+        unsigned long root = of_get_flat_dt_root();
+        if (of_flat_dt_is_compatible(root, "amcc,canyonlands")) {
+                ppc_pci_set_flags(PPC_PCI_REASSIGN_ALL_RSRC);
+                return 1;
+                }
+        return 0;
+}
+
+/* USB PHY fixup code on Canyonlands kit. */
+
+static int __init ppc460ex_canyonlands_fixup(void)
+{
+        u8 __iomem *bcsr ;
+        void __iomem *vaddr;
+        struct device_node *np;
+        int ret = 0;
+
+        np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
+        if (!np) {
+                printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
+                return -ENODEV;
+        }
+
+        bcsr = of_iomap(np, 0);
+        of_node_put(np);
+
+        if (!bcsr) {
+                printk(KERN_CRIT "Could not remap bcsr\n");
+                ret = -ENODEV;
+                goto err_bcsr;
+        }
+
+        np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
+        if (!np) {
+                printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
+                return -ENODEV;
+        }
+
+        vaddr = of_iomap(np, 0);
+        of_node_put(np);
+
+        if (!vaddr) {
+                printk(KERN_CRIT "Could not get gpio node address\n");
+                ret = -ENODEV;
+                goto err_gpio;
+        }
+        /* Disable USB, through the BCSR7 bits */
+        setbits8(&bcsr[7], BCSR_USB_EN);
+
+        /* Wait for a while after reset */
+        msleep(100);
+
+        /* Enable USB here */
+        clrbits8(&bcsr[7], BCSR_USB_EN);
+
+        /*
+         * Configure multiplexed gpio16 and gpio19 as alternate1 output
+         * source after USB reset. In this configuration gpio16 will be
+         * USB2HStop and gpio19 will be USB2DStop. For more details refer to
+         * table 34-7 of PPC460EX user manual.
+         */
+        setbits32((vaddr + GPIO0_OSRH), 0x42000000);
+        setbits32((vaddr + GPIO0_TSRH), 0x42000000);
+err_gpio:
+        iounmap(vaddr);
+err_bcsr:
+        iounmap(bcsr);
+        return ret;
+}
+machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
+define_machine(canyonlands) {
+        .name = "Canyonlands",
+        .probe = ppc460ex_probe,
+        .progress = udbg_progress,
+        .init_IRQ = uic_init_tree,
+        .get_irq = uic_get_irq,
+        .restart = ppc4xx_reset_system,
+        .calibrate_decr = generic_calibrate_decr,
+};
diff --git a/arch/powerpc/platforms/44x/ppc44x_simple.c b/arch/powerpc/platforms/44x/ppc44x_simple.c
index 7ddcba3b9397..c81c19c0b3d4 100644
--- a/arch/powerpc/platforms/44x/ppc44x_simple.c
+++ b/arch/powerpc/platforms/44x/ppc44x_simple.c
@@ -53,7 +53,6 @@ static char *board[] __initdata = {
         "amcc,arches",
         "amcc,bamboo",
         "amcc,bluestone",
-        "amcc,canyonlands",
         "amcc,glacier",
         "ibm,ebony",
         "amcc,eiger",