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118 lines
2.7 KiB
118 lines
2.7 KiB
// 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 <[email protected]> |
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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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