192 lines
4.2 KiB
C
192 lines
4.2 KiB
C
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/*
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* MPC86xx HPCN board specific routines
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*
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* Recode: ZHANG WEI <wei.zhang@freescale.com>
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* Initial author: Xianghua Xiao <x.xiao@freescale.com>
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*
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* Copyright 2006 Freescale Semiconductor Inc.
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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/pci.h>
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#include <linux/kdev_t.h>
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#include <linux/delay.h>
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#include <linux/seq_file.h>
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#include <linux/of_platform.h>
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#include <linux/memblock.h>
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#include <asm/time.h>
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#include <asm/machdep.h>
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#include <asm/pci-bridge.h>
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#include <asm/prom.h>
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#include <mm/mmu_decl.h>
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#include <asm/udbg.h>
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#include <asm/swiotlb.h>
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#include <asm/mpic.h>
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#include <sysdev/fsl_pci.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc86xx.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
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#else
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#define DBG(fmt...) do { } while(0)
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#endif
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#ifdef CONFIG_PCI
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extern int uli_exclude_device(struct pci_controller *hose,
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u_char bus, u_char devfn);
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static int mpc86xx_exclude_device(struct pci_controller *hose,
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u_char bus, u_char devfn)
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{
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struct device_node* node;
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struct resource rsrc;
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node = hose->dn;
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of_address_to_resource(node, 0, &rsrc);
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if ((rsrc.start & 0xfffff) == 0x8000) {
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return uli_exclude_device(hose, bus, devfn);
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}
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return PCIBIOS_SUCCESSFUL;
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}
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#endif /* CONFIG_PCI */
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static void __init
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mpc86xx_hpcn_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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struct pci_controller *hose;
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#endif
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dma_addr_t max = 0xffffffff;
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if (ppc_md.progress)
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ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
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#ifdef CONFIG_PCI
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for_each_compatible_node(np, "pci", "fsl,mpc8641-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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hose = pci_find_hose_for_OF_device(np);
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max = min(max, hose->dma_window_base_cur +
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hose->dma_window_size);
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}
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ppc_md.pci_exclude_device = mpc86xx_exclude_device;
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#endif
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printk("MPC86xx HPCN board from Freescale Semiconductor\n");
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#ifdef CONFIG_SMP
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mpc86xx_smp_init();
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#endif
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#ifdef CONFIG_SWIOTLB
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if (memblock_end_of_DRAM() > max) {
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ppc_swiotlb_enable = 1;
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set_pci_dma_ops(&swiotlb_dma_ops);
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ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
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}
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#endif
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}
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static void
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mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
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{
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uint svid = mfspr(SPRN_SVR);
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seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
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seq_printf(m, "SVR\t\t: 0x%x\n", svid);
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}
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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 mpc86xx_hpcn_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
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return 1; /* Looks good */
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/* Be nice and don't give silent boot death. Delete this in 2.6.27 */
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if (of_flat_dt_is_compatible(root, "mpc86xx")) {
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pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
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return 1;
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}
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return 0;
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}
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static long __init
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mpc86xx_time_init(void)
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{
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unsigned int temp;
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/* Set the time base to zero */
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mtspr(SPRN_TBWL, 0);
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mtspr(SPRN_TBWU, 0);
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temp = mfspr(SPRN_HID0);
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temp |= HID0_TBEN;
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mtspr(SPRN_HID0, temp);
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asm volatile("isync");
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return 0;
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}
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static __initdata struct of_device_id of_bus_ids[] = {
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{ .compatible = "simple-bus", },
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{ .compatible = "fsl,srio", },
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{ .compatible = "gianfar", },
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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(mpc86xx_hpcn, declare_of_platform_devices);
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machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
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define_machine(mpc86xx_hpcn) {
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.name = "MPC86xx HPCN",
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.probe = mpc86xx_hpcn_probe,
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.setup_arch = mpc86xx_hpcn_setup_arch,
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.init_IRQ = mpc86xx_init_irq,
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.show_cpuinfo = mpc86xx_hpcn_show_cpuinfo,
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.get_irq = mpic_get_irq,
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.restart = fsl_rstcr_restart,
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.time_init = mpc86xx_time_init,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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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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};
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