arch/powerpc/platforms/52xx/efika-setup.c

   1 /*
   2  *
   3  * Efika 5K2 platform setup
   4  * Some code really inspired from the lite5200b platform.
   5  *
   6  * Copyright (C) 2006 bplan GmbH
   7  *
   8  * This file is licensed under the terms of the GNU General Public License
   9  * version 2. This program is licensed "as is" without any warranty of any
  10  * kind, whether express or implied.
  11  *
  12  */
  13
  14 #include <linux/errno.h>
  15 #include <linux/kernel.h>
  16 #include <linux/slab.h>
  17 #include <linux/reboot.h>
  18 #include <linux/init.h>
  19 #include <linux/utsrelease.h>
  20 #include <linux/seq_file.h>
  21 #include <linux/root_dev.h>
  22 #include <linux/initrd.h>
  23 #include <linux/timer.h>
  24 #include <linux/pci.h>
  25
  26 #include <asm/pgtable.h>
  27 #include <asm/prom.h>
  28 #include <asm/time.h>
  29 #include <asm/machdep.h>
  30 #include <asm/rtas.h>
  31 #include <asm/of_device.h>
  32 #include <asm/of_platform.h>
  33 #include <asm/mpc52xx.h>
  34
  35 #include "efika.h"
  36
  37 static void efika_show_cpuinfo(struct seq_file *m)
  38 {
  39         struct device_node *root;
  40         const char *revision = NULL;
  41         const char *codegendescription = NULL;
  42         const char *codegenvendor = NULL;
  43
  44         root = of_find_node_by_path("/");
  45         if (root) {
  46                 revision = get_property(root, "revision", NULL);
  47                 codegendescription =
  48                     get_property(root, "CODEGEN,description", NULL);
  49                 codegenvendor = get_property(root, "CODEGEN,vendor", NULL);
  50
  51                 of_node_put(root);
  52         }
  53
  54         if (codegendescription)
  55                 seq_printf(m, "machine\t\t: %s\n", codegendescription);
  56         else
  57                 seq_printf(m, "machine\t\t: Efika\n");
  58
  59         if (revision)
  60                 seq_printf(m, "revision\t: %s\n", revision);
  61
  62         if (codegenvendor)
  63                 seq_printf(m, "vendor\t\t: %s\n", codegenvendor);
  64
  65         of_node_put(root);
  66 }
  67
  68 static void __init efika_setup_arch(void)
  69 {
  70         rtas_initialize();
  71
  72 #ifdef CONFIG_BLK_DEV_INITRD
  73         initrd_below_start_ok = 1;
  74
  75         if (initrd_start)
  76                 ROOT_DEV = Root_RAM0;
  77         else
  78 #endif
  79                 ROOT_DEV = Root_SDA2;   /* sda2 (sda1 is for the kernel) */
  80
  81         efika_pcisetup();
  82
  83         if (ppc_md.progress)
  84                 ppc_md.progress("Linux/PPC " UTS_RELEASE " runnung on Efika ;-)\n", 0x0);
  85 }
  86
  87 static void __init efika_init(void)
  88 {
  89         struct device_node *np;
  90         struct device_node *cnp = NULL;
  91         const u32 *base;
  92
  93         /* Find every child of the SOC node and add it to of_platform */
  94         np = of_find_node_by_name(NULL, "builtin");
  95         if (np) {
  96                 char name[BUS_ID_SIZE];
  97                 while ((cnp = of_get_next_child(np, cnp))) {
  98                         strcpy(name, cnp->name);
  99
 100                         base = get_property(cnp, "reg", NULL);
 101                         if (base == NULL)
 102                                 continue;
 103
 104                         snprintf(name+strlen(name), BUS_ID_SIZE, "@%x", *base);
 105                         of_platform_device_create(cnp, name, NULL);
 106
 107                         printk(KERN_INFO EFIKA_PLATFORM_NAME" : Added %s (type '%s' at '%s') to the known devices\n", name, cnp->type, cnp->full_name);
 108                 }
 109         }
 110
 111         if (ppc_md.progress)
 112                 ppc_md.progress("  Have fun with your Efika!    ", 0x7777);
 113 }
 114
 115 static int __init efika_probe(void)
 116 {
 117         char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
 118                                           "model", NULL);
 119
 120         if (model == NULL)
 121                 return 0;
 122         if (strcmp(model, "EFIKA5K2"))
 123                 return 0;
 124
 125         ISA_DMA_THRESHOLD = ~0L;
 126         DMA_MODE_READ = 0x44;
 127         DMA_MODE_WRITE = 0x48;
 128
 129         return 1;
 130 }
 131
 132 define_machine(efika)
 133 {
 134         .name = EFIKA_PLATFORM_NAME,
 135         .probe = efika_probe,
 136         .setup_arch = efika_setup_arch,
 137         .init = efika_init,
 138         .show_cpuinfo = efika_show_cpuinfo,
 139         .init_IRQ = mpc52xx_init_irq,
 140         .get_irq = mpc52xx_get_irq,
 141         .restart = rtas_restart,
 142         .power_off = rtas_power_off,
 143         .halt = rtas_halt,
 144         .set_rtc_time = rtas_set_rtc_time,
 145         .get_rtc_time = rtas_get_rtc_time,
 146         .progress = rtas_progress,
 147         .get_boot_time = rtas_get_boot_time,
 148         .calibrate_decr = generic_calibrate_decr,
 149         .phys_mem_access_prot = pci_phys_mem_access_prot,
 150 };