119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* This contain platform specific code for APM PPC460EX based Canyonlands
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* board.
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*
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* Copyright (c) 2010, Applied Micro Circuits Corporation
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* Author: Rupjyoti Sarmah <rsarmah@apm.com>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/pci-bridge.h>
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#include <asm/ppc4xx.h>
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#include <asm/udbg.h>
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#include <asm/uic.h>
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#include <linux/of_platform.h>
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#include <linux/delay.h>
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#include "44x.h"
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#define BCSR_USB_EN 0x11
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static const struct of_device_id ppc460ex_of_bus[] __initconst = {
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{ .compatible = "ibm,plb4", },
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{ .compatible = "ibm,opb", },
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{ .compatible = "ibm,ebc", },
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init ppc460ex_device_probe(void)
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{
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of_platform_bus_probe(NULL, ppc460ex_of_bus, NULL);
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return 0;
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}
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machine_device_initcall(canyonlands, ppc460ex_device_probe);
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/* Using this code only for the Canyonlands board. */
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static int __init ppc460ex_probe(void)
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{
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if (of_machine_is_compatible("amcc,canyonlands")) {
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pci_set_flags(PCI_REASSIGN_ALL_RSRC);
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return 1;
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}
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return 0;
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}
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/* USB PHY fixup code on Canyonlands kit. */
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static int __init ppc460ex_canyonlands_fixup(void)
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{
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u8 __iomem *bcsr ;
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void __iomem *vaddr;
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struct device_node *np;
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int ret = 0;
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np = of_find_compatible_node(NULL, NULL, "amcc,ppc460ex-bcsr");
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if (!np) {
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printk(KERN_ERR "failed did not find amcc, ppc460ex bcsr node\n");
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return -ENODEV;
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}
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bcsr = of_iomap(np, 0);
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of_node_put(np);
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if (!bcsr) {
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printk(KERN_CRIT "Could not remap bcsr\n");
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ret = -ENODEV;
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goto err_bcsr;
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}
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np = of_find_compatible_node(NULL, NULL, "ibm,ppc4xx-gpio");
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if (!np) {
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printk(KERN_ERR "failed did not find ibm,ppc4xx-gpio node\n");
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return -ENODEV;
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}
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vaddr = of_iomap(np, 0);
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of_node_put(np);
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if (!vaddr) {
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printk(KERN_CRIT "Could not get gpio node address\n");
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ret = -ENODEV;
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goto err_gpio;
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}
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/* Disable USB, through the BCSR7 bits */
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setbits8(&bcsr[7], BCSR_USB_EN);
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/* Wait for a while after reset */
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msleep(100);
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/* Enable USB here */
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clrbits8(&bcsr[7], BCSR_USB_EN);
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/*
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* Configure multiplexed gpio16 and gpio19 as alternate1 output
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* source after USB reset. In this configuration gpio16 will be
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* USB2HStop and gpio19 will be USB2DStop. For more details refer to
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* table 34-7 of PPC460EX user manual.
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*/
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setbits32((vaddr + GPIO0_OSRH), 0x42000000);
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setbits32((vaddr + GPIO0_TSRH), 0x42000000);
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err_gpio:
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iounmap(vaddr);
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err_bcsr:
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iounmap(bcsr);
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return ret;
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}
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machine_device_initcall(canyonlands, ppc460ex_canyonlands_fixup);
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define_machine(canyonlands) {
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.name = "Canyonlands",
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.probe = ppc460ex_probe,
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.progress = udbg_progress,
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.init_IRQ = uic_init_tree,
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.get_irq = uic_get_irq,
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.restart = ppc4xx_reset_system,
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.calibrate_decr = generic_calibrate_decr,
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};
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