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Linux/arch/powerpc/platforms/85xx/sbc8548.c

  1 /*
  2  * Wind River SBC8548 setup and early boot code.
  3  *
  4  * Copyright 2007 Wind River Systems Inc.
  5  *
  6  * By Paul Gortmaker (see MAINTAINERS for contact information)
  7  *
  8  * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
  9  *
 10  *
 11  * This program is free software; you can redistribute  it and/or modify it
 12  * under  the terms of  the GNU General  Public License as published by the
 13  * Free Software Foundation;  either version 2 of the  License, or (at your
 14  * option) any later version.
 15  */
 16 
 17 #include <linux/stddef.h>
 18 #include <linux/kernel.h>
 19 #include <linux/init.h>
 20 #include <linux/errno.h>
 21 #include <linux/reboot.h>
 22 #include <linux/pci.h>
 23 #include <linux/kdev_t.h>
 24 #include <linux/major.h>
 25 #include <linux/console.h>
 26 #include <linux/delay.h>
 27 #include <linux/seq_file.h>
 28 #include <linux/initrd.h>
 29 #include <linux/interrupt.h>
 30 #include <linux/fsl_devices.h>
 31 #include <linux/of_platform.h>
 32 
 33 #include <asm/pgtable.h>
 34 #include <asm/page.h>
 35 #include <linux/atomic.h>
 36 #include <asm/time.h>
 37 #include <asm/io.h>
 38 #include <asm/machdep.h>
 39 #include <asm/ipic.h>
 40 #include <asm/pci-bridge.h>
 41 #include <asm/irq.h>
 42 #include <mm/mmu_decl.h>
 43 #include <asm/prom.h>
 44 #include <asm/udbg.h>
 45 #include <asm/mpic.h>
 46 
 47 #include <sysdev/fsl_soc.h>
 48 #include <sysdev/fsl_pci.h>
 49 
 50 #include "mpc85xx.h"
 51 
 52 static int sbc_rev;
 53 
 54 static void __init sbc8548_pic_init(void)
 55 {
 56         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 57                         0, 256, " OpenPIC  ");
 58         BUG_ON(mpic == NULL);
 59         mpic_init(mpic);
 60 }
 61 
 62 /* Extract the HW Rev from the EPLD on the board */
 63 static int __init sbc8548_hw_rev(void)
 64 {
 65         struct device_node *np;
 66         struct resource res;
 67         unsigned int *rev;
 68         int board_rev = 0;
 69 
 70         np = of_find_compatible_node(NULL, NULL, "hw-rev");
 71         if (np == NULL) {
 72                 printk("No HW-REV found in DTB.\n");
 73                 return -ENODEV;
 74         }
 75 
 76         of_address_to_resource(np, 0, &res);
 77         of_node_put(np);
 78 
 79         rev = ioremap(res.start,sizeof(unsigned int));
 80         board_rev = (*rev) >> 28;
 81         iounmap(rev);
 82 
 83         return board_rev;
 84 }
 85 
 86 /*
 87  * Setup the architecture
 88  */
 89 static void __init sbc8548_setup_arch(void)
 90 {
 91         if (ppc_md.progress)
 92                 ppc_md.progress("sbc8548_setup_arch()", 0);
 93 
 94         fsl_pci_assign_primary();
 95 
 96         sbc_rev = sbc8548_hw_rev();
 97 }
 98 
 99 static void sbc8548_show_cpuinfo(struct seq_file *m)
100 {
101         uint pvid, svid, phid1;
102 
103         pvid = mfspr(SPRN_PVR);
104         svid = mfspr(SPRN_SVR);
105 
106         seq_printf(m, "Vendor\t\t: Wind River\n");
107         seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
108         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
109         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
110 
111         /* Display cpu Pll setting */
112         phid1 = mfspr(SPRN_HID1);
113         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
114 }
115 
116 machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
117 
118 /*
119  * Called very early, device-tree isn't unflattened
120  */
121 static int __init sbc8548_probe(void)
122 {
123         unsigned long root = of_get_flat_dt_root();
124 
125         return of_flat_dt_is_compatible(root, "SBC8548");
126 }
127 
128 define_machine(sbc8548) {
129         .name           = "SBC8548",
130         .probe          = sbc8548_probe,
131         .setup_arch     = sbc8548_setup_arch,
132         .init_IRQ       = sbc8548_pic_init,
133         .show_cpuinfo   = sbc8548_show_cpuinfo,
134         .get_irq        = mpic_get_irq,
135         .restart        = fsl_rstcr_restart,
136 #ifdef CONFIG_PCI
137         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
138         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
139 #endif
140         .calibrate_decr = generic_calibrate_decr,
141         .progress       = udbg_progress,
142 };
143 

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