192 lines
4.2 KiB
C
192 lines
4.2 KiB
C
/*
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* Wind River SBC8548 setup and early boot code.
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*
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* Copyright 2007 Wind River Systems Inc.
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*
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* By Paul Gortmaker (see MAINTAINERS for contact information)
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*
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* Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
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*
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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/stddef.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/reboot.h>
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#include <linux/pci.h>
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#include <linux/kdev_t.h>
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#include <linux/major.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/seq_file.h>
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#include <linux/initrd.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/fsl_devices.h>
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#include <linux/of_platform.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <asm/atomic.h>
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#include <asm/time.h>
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#include <asm/io.h>
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#include <asm/machdep.h>
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#include <asm/ipic.h>
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#include <asm/pci-bridge.h>
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#include <asm/irq.h>
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#include <mm/mmu_decl.h>
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#include <asm/prom.h>
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#include <asm/udbg.h>
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#include <asm/mpic.h>
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#include <sysdev/fsl_soc.h>
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#include <sysdev/fsl_pci.h>
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static int sbc_rev;
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static void __init sbc8548_pic_init(void)
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{
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struct mpic *mpic;
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struct resource r;
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struct device_node *np = NULL;
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np = of_find_node_by_type(np, "open-pic");
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if (np == NULL) {
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printk(KERN_ERR "Could not find open-pic node\n");
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return;
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}
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if (of_address_to_resource(np, 0, &r)) {
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printk(KERN_ERR "Failed to map mpic register space\n");
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of_node_put(np);
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return;
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}
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mpic = mpic_alloc(np, r.start,
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MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
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0, 256, " OpenPIC ");
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BUG_ON(mpic == NULL);
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/* Return the mpic node */
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of_node_put(np);
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mpic_init(mpic);
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}
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/* Extract the HW Rev from the EPLD on the board */
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static int __init sbc8548_hw_rev(void)
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{
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struct device_node *np;
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struct resource res;
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unsigned int *rev;
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int board_rev = 0;
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np = of_find_compatible_node(NULL, NULL, "hw-rev");
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if (np == NULL) {
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printk("No HW-REV found in DTB.\n");
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return -ENODEV;
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}
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of_address_to_resource(np, 0, &res);
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of_node_put(np);
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rev = ioremap(res.start,sizeof(unsigned int));
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board_rev = (*rev) >> 28;
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iounmap(rev);
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return board_rev;
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}
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/*
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* Setup the architecture
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*/
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static void __init sbc8548_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("sbc8548_setup_arch()", 0);
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#ifdef CONFIG_PCI
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for_each_node_by_type(np, "pci") {
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if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
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of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
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struct resource rsrc;
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of_address_to_resource(np, 0, &rsrc);
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if ((rsrc.start & 0xfffff) == 0x8000)
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fsl_add_bridge(np, 1);
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else
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fsl_add_bridge(np, 0);
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}
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}
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#endif
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sbc_rev = sbc8548_hw_rev();
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}
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static void sbc8548_show_cpuinfo(struct seq_file *m)
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{
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uint pvid, svid, phid1;
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pvid = mfspr(SPRN_PVR);
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svid = mfspr(SPRN_SVR);
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seq_printf(m, "Vendor\t\t: Wind River\n");
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seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
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seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
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seq_printf(m, "SVR\t\t: 0x%x\n", svid);
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/* Display cpu Pll setting */
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phid1 = mfspr(SPRN_HID1);
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seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
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}
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static struct of_device_id __initdata of_bus_ids[] = {
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{ .name = "soc", },
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{ .type = "soc", },
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{ .compatible = "simple-bus", },
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{},
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};
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static int __init declare_of_platform_devices(void)
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{
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of_platform_bus_probe(NULL, of_bus_ids, NULL);
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return 0;
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}
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machine_device_initcall(sbc8548, declare_of_platform_devices);
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init sbc8548_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, "SBC8548");
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}
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define_machine(sbc8548) {
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.name = "SBC8548",
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.probe = sbc8548_probe,
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.setup_arch = sbc8548_setup_arch,
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.init_IRQ = sbc8548_pic_init,
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.show_cpuinfo = sbc8548_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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#ifdef CONFIG_PCI
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.pcibios_fixup_bus = fsl_pcibios_fixup_bus,
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#endif
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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