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62666828ba
In the standalone setup the board's CPLD disables the PCI internal arbiter, thus any access to the PCI bus will hang the board. The common way to disable particular devices in the device tree is to put the "status" property with any value other than "ok" or "okay" into the device node we want to disable. So, when there is no PCI arbiter on the bus the u-boot adds status = "broken (no arbiter)" property into the PCI controller's node, and so marks the PCI controller as unavailable. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
153 lines
3.5 KiB
C
153 lines
3.5 KiB
C
/*
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* arch/powerpc/platforms/83xx/mpc837x_mds.c
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*
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* Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved.
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*
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* MPC837x MDS board specific routines
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/pci.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <asm/time.h>
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#include <asm/ipic.h>
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#include <asm/udbg.h>
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#include <asm/prom.h>
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#include <sysdev/fsl_pci.h>
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#include "mpc83xx.h"
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#define BCSR12_USB_SER_MASK 0x8a
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#define BCSR12_USB_SER_PIN 0x80
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#define BCSR12_USB_SER_DEVICE 0x02
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extern int mpc837x_usb_cfg(void);
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static int mpc837xmds_usb_cfg(void)
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{
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struct device_node *np;
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const void *phy_type, *mode;
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void __iomem *bcsr_regs = NULL;
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u8 bcsr12;
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int ret;
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ret = mpc837x_usb_cfg();
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if (ret)
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return ret;
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/* Map BCSR area */
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np = of_find_compatible_node(NULL, NULL, "fsl,mpc837xmds-bcsr");
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if (np) {
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bcsr_regs = of_iomap(np, 0);
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of_node_put(np);
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}
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if (!bcsr_regs)
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return -1;
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np = of_find_node_by_name(NULL, "usb");
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if (!np)
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return -ENODEV;
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phy_type = of_get_property(np, "phy_type", NULL);
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if (phy_type && !strcmp(phy_type, "ulpi")) {
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clrbits8(bcsr_regs + 12, BCSR12_USB_SER_PIN);
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} else if (phy_type && !strcmp(phy_type, "serial")) {
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mode = of_get_property(np, "dr_mode", NULL);
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bcsr12 = in_8(bcsr_regs + 12) & ~BCSR12_USB_SER_MASK;
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bcsr12 |= BCSR12_USB_SER_PIN;
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if (mode && !strcmp(mode, "peripheral"))
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bcsr12 |= BCSR12_USB_SER_DEVICE;
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out_8(bcsr_regs + 12, bcsr12);
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} else {
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printk(KERN_ERR "USB DR: unsupported PHY\n");
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}
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of_node_put(np);
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iounmap(bcsr_regs);
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return 0;
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}
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/* ************************************************************************
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*
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* Setup the architecture
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*
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*/
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static void __init mpc837x_mds_setup_arch(void)
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{
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#ifdef CONFIG_PCI
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struct device_node *np;
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#endif
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if (ppc_md.progress)
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ppc_md.progress("mpc837x_mds_setup_arch()", 0);
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#ifdef CONFIG_PCI
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for_each_compatible_node(np, "pci", "fsl,mpc8349-pci") {
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if (!of_device_is_available(np)) {
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pr_warning("%s: disabled by the firmware.\n",
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np->full_name);
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continue;
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}
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mpc83xx_add_bridge(np);
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}
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#endif
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mpc837xmds_usb_cfg();
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}
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static struct of_device_id mpc837x_ids[] = {
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{ .type = "soc", },
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{ .compatible = "soc", },
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init mpc837x_declare_of_platform_devices(void)
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{
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/* Publish of_device */
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of_platform_bus_probe(NULL, mpc837x_ids, NULL);
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return 0;
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}
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machine_device_initcall(mpc837x_mds, mpc837x_declare_of_platform_devices);
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static void __init mpc837x_mds_init_IRQ(void)
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{
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
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if (!np)
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return;
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ipic_init(np, 0);
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/* Initialize the default interrupt mapping priorities,
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* in case the boot rom changed something on us.
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*/
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ipic_set_default_priority();
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}
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init mpc837x_mds_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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return of_flat_dt_is_compatible(root, "fsl,mpc837xmds");
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}
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define_machine(mpc837x_mds) {
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.name = "MPC837x MDS",
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.probe = mpc837x_mds_probe,
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.setup_arch = mpc837x_mds_setup_arch,
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.init_IRQ = mpc837x_mds_init_IRQ,
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.get_irq = ipic_get_irq,
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.restart = mpc83xx_restart,
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.time_init = mpc83xx_time_init,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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