powerpc/44x: PHY fixup for USB on canyonlands board (8960f7ff) · Commits · e / devices / android_kernel_oneplus_sm7250

arch/powerpc/boot/dts/canyonlands.dts

+11 −0

Original line number	Diff line number	Diff line
		@@ -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>;

arch/powerpc/platforms/44x/44x.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -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 */

arch/powerpc/platforms/44x/Kconfig

+0 −1

Original line number	Diff line number	Diff line
		@@ -115,7 +115,6 @@ config CANYONLANDS
		bool "Canyonlands"
		depends on 44x
		default n
		select PPC44x_SIMPLE
		select 460EX
		select PCI
		select PPC4xx_PCI_EXPRESS

arch/powerpc/platforms/44x/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -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

arch/powerpc/platforms/44x/canyonlands.c

0 → 100644

+134 −0

Original line number	Diff line number	Diff line
		/*
		* 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,
		};