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Linux/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c

  1 /*
  2  * MPC86xx HPCN board specific routines
  3  *
  4  * Recode: ZHANG WEI <wei.zhang@freescale.com>
  5  * Initial author: Xianghua Xiao <x.xiao@freescale.com>
  6  *
  7  * Copyright 2006 Freescale Semiconductor Inc.
  8  *
  9  * This program is free software; you can redistribute  it and/or modify it
 10  * under  the terms of  the GNU General  Public License as published by the
 11  * Free Software Foundation;  either version 2 of the  License, or (at your
 12  * option) any later version.
 13  */
 14 
 15 #include <linux/stddef.h>
 16 #include <linux/kernel.h>
 17 #include <linux/pci.h>
 18 #include <linux/kdev_t.h>
 19 #include <linux/delay.h>
 20 #include <linux/seq_file.h>
 21 #include <linux/of_platform.h>
 22 
 23 #include <asm/time.h>
 24 #include <asm/machdep.h>
 25 #include <asm/pci-bridge.h>
 26 #include <asm/prom.h>
 27 #include <mm/mmu_decl.h>
 28 #include <asm/udbg.h>
 29 #include <asm/swiotlb.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 #undef DEBUG
 39 
 40 #ifdef DEBUG
 41 #define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
 42 #else
 43 #define DBG(fmt...) do { } while(0)
 44 #endif
 45 
 46 #ifdef CONFIG_PCI
 47 extern int uli_exclude_device(struct pci_controller *hose,
 48                                 u_char bus, u_char devfn);
 49 
 50 static int mpc86xx_exclude_device(struct pci_controller *hose,
 51                                    u_char bus, u_char devfn)
 52 {
 53         if (hose->dn == fsl_pci_primary)
 54                 return uli_exclude_device(hose, bus, devfn);
 55 
 56         return PCIBIOS_SUCCESSFUL;
 57 }
 58 #endif /* CONFIG_PCI */
 59 
 60 
 61 static void __init
 62 mpc86xx_hpcn_setup_arch(void)
 63 {
 64         if (ppc_md.progress)
 65                 ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
 66 
 67 #ifdef CONFIG_PCI
 68         ppc_md.pci_exclude_device = mpc86xx_exclude_device;
 69 #endif
 70 
 71         printk("MPC86xx HPCN board from Freescale Semiconductor\n");
 72 
 73 #ifdef CONFIG_SMP
 74         mpc86xx_smp_init();
 75 #endif
 76 
 77         fsl_pci_assign_primary();
 78 
 79         swiotlb_detect_4g();
 80 }
 81 
 82 
 83 static void
 84 mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
 85 {
 86         uint svid = mfspr(SPRN_SVR);
 87 
 88         seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
 89 
 90         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 91 }
 92 
 93 
 94 /*
 95  * Called very early, device-tree isn't unflattened
 96  */
 97 static int __init mpc86xx_hpcn_probe(void)
 98 {
 99         unsigned long root = of_get_flat_dt_root();
100 
101         if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
102                 return 1;       /* Looks good */
103 
104         /* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
105         if (of_flat_dt_is_compatible(root, "mpc86xx")) {
106                 pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
107                 return 1;
108         }
109 
110         return 0;
111 }
112 
113 static long __init
114 mpc86xx_time_init(void)
115 {
116         unsigned int temp;
117 
118         /* Set the time base to zero */
119         mtspr(SPRN_TBWL, 0);
120         mtspr(SPRN_TBWU, 0);
121 
122         temp = mfspr(SPRN_HID0);
123         temp |= HID0_TBEN;
124         mtspr(SPRN_HID0, temp);
125         asm volatile("isync");
126 
127         return 0;
128 }
129 
130 static __initdata struct of_device_id of_bus_ids[] = {
131         { .compatible = "simple-bus", },
132         { .compatible = "fsl,srio", },
133         { .compatible = "gianfar", },
134         { .compatible = "fsl,mpc8641-pcie", },
135         {},
136 };
137 
138 static int __init declare_of_platform_devices(void)
139 {
140         of_platform_bus_probe(NULL, of_bus_ids, NULL);
141 
142         return 0;
143 }
144 machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
145 machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
146 
147 define_machine(mpc86xx_hpcn) {
148         .name                   = "MPC86xx HPCN",
149         .probe                  = mpc86xx_hpcn_probe,
150         .setup_arch             = mpc86xx_hpcn_setup_arch,
151         .init_IRQ               = mpc86xx_init_irq,
152         .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
153         .get_irq                = mpic_get_irq,
154         .restart                = fsl_rstcr_restart,
155         .time_init              = mpc86xx_time_init,
156         .calibrate_decr         = generic_calibrate_decr,
157         .progress               = udbg_progress,
158 #ifdef CONFIG_PCI
159         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
160 #endif
161 };
162 

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