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Linux/arch/powerpc/platforms/86xx/sbc8641d.c

  1 /*
  2  * SBC8641D board specific routines
  3  *
  4  * Copyright 2008 Wind River Systems Inc.
  5  *
  6  * By Paul Gortmaker (see MAINTAINERS for contact information)
  7  *
  8  * Based largely on the 8641 HPCN support by Freescale Semiconductor Inc.
  9  *
 10  * This program is free software; you can redistribute  it and/or modify it
 11  * under  the terms of  the GNU General  Public License as published by the
 12  * Free Software Foundation;  either version 2 of the  License, or (at your
 13  * option) any later version.
 14  */
 15 
 16 #include <linux/stddef.h>
 17 #include <linux/kernel.h>
 18 #include <linux/pci.h>
 19 #include <linux/kdev_t.h>
 20 #include <linux/delay.h>
 21 #include <linux/seq_file.h>
 22 #include <linux/of_platform.h>
 23 
 24 #include <asm/time.h>
 25 #include <asm/machdep.h>
 26 #include <asm/pci-bridge.h>
 27 #include <asm/prom.h>
 28 #include <mm/mmu_decl.h>
 29 #include <asm/udbg.h>
 30 
 31 #include <asm/mpic.h>
 32 
 33 #include <sysdev/fsl_pci.h>
 34 #include <sysdev/fsl_soc.h>
 35 
 36 #include "mpc86xx.h"
 37 
 38 static void __init
 39 sbc8641_setup_arch(void)
 40 {
 41         if (ppc_md.progress)
 42                 ppc_md.progress("sbc8641_setup_arch()", 0);
 43 
 44         printk("SBC8641 board from Wind River\n");
 45 
 46 #ifdef CONFIG_SMP
 47         mpc86xx_smp_init();
 48 #endif
 49 
 50         fsl_pci_assign_primary();
 51 }
 52 
 53 
 54 static void
 55 sbc8641_show_cpuinfo(struct seq_file *m)
 56 {
 57         uint svid = mfspr(SPRN_SVR);
 58 
 59         seq_printf(m, "Vendor\t\t: Wind River Systems\n");
 60 
 61         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 62 }
 63 
 64 
 65 /*
 66  * Called very early, device-tree isn't unflattened
 67  */
 68 static int __init sbc8641_probe(void)
 69 {
 70         unsigned long root = of_get_flat_dt_root();
 71 
 72         if (of_flat_dt_is_compatible(root, "wind,sbc8641"))
 73                 return 1;       /* Looks good */
 74 
 75         return 0;
 76 }
 77 
 78 static long __init
 79 mpc86xx_time_init(void)
 80 {
 81         unsigned int temp;
 82 
 83         /* Set the time base to zero */
 84         mtspr(SPRN_TBWL, 0);
 85         mtspr(SPRN_TBWU, 0);
 86 
 87         temp = mfspr(SPRN_HID0);
 88         temp |= HID0_TBEN;
 89         mtspr(SPRN_HID0, temp);
 90         asm volatile("isync");
 91 
 92         return 0;
 93 }
 94 
 95 static __initdata struct of_device_id of_bus_ids[] = {
 96         { .compatible = "simple-bus", },
 97         { .compatible = "gianfar", },
 98         { .compatible = "fsl,mpc8641-pcie", },
 99         {},
100 };
101 
102 static int __init declare_of_platform_devices(void)
103 {
104         of_platform_bus_probe(NULL, of_bus_ids, NULL);
105 
106         return 0;
107 }
108 machine_arch_initcall(sbc8641, declare_of_platform_devices);
109 
110 define_machine(sbc8641) {
111         .name                   = "SBC8641D",
112         .probe                  = sbc8641_probe,
113         .setup_arch             = sbc8641_setup_arch,
114         .init_IRQ               = mpc86xx_init_irq,
115         .show_cpuinfo           = sbc8641_show_cpuinfo,
116         .get_irq                = mpic_get_irq,
117         .restart                = fsl_rstcr_restart,
118         .time_init              = mpc86xx_time_init,
119         .calibrate_decr         = generic_calibrate_decr,
120         .progress               = udbg_progress,
121 #ifdef CONFIG_PCI
122         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
123 #endif
124 };
125 

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