arch/ppc/syslib/ppc_sys.c

   1 /*
   2  * arch/ppc/syslib/ppc_sys.c
   3  *
   4  * PPC System library functions
   5  *
   6  * Maintainer: Kumar Gala <kumar.gala@freescale.com>
   7  *
   8  * Copyright 2005 Freescale Semiconductor Inc.
   9  * Copyright 2005 MontaVista, Inc. by Vitaly Bordug <vbordug@ru.mvista.com>
  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 <asm/ppc_sys.h>
  18
  19 int (*ppc_sys_device_fixup) (struct platform_device * pdev);
  20
  21 static int ppc_sys_inited;
  22
  23 void __init identify_ppc_sys_by_id(u32 id)
  24 {
  25         unsigned int i = 0;
  26         while (1) {
  27                 if ((ppc_sys_specs[i].mask & id) == ppc_sys_specs[i].value)
  28                         break;
  29                 i++;
  30         }
  31
  32         cur_ppc_sys_spec = &ppc_sys_specs[i];
  33
  34         return;
  35 }
  36
  37 void __init identify_ppc_sys_by_name(char *name)
  38 {
  39         unsigned int i = 0;
  40         while (ppc_sys_specs[i].ppc_sys_name[0])
  41         {
  42                 if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name))
  43                         break;
  44                 i++;
  45         }
  46         cur_ppc_sys_spec = &ppc_sys_specs[i];
  47         return;
  48 }
  49
  50 static int __init count_sys_specs(void)
  51 {
  52         int i = 0;
  53         while (ppc_sys_specs[i].ppc_sys_name[0])
  54                 i++;
  55         return i;
  56 }
  57
  58 static int __init find_chip_by_name_and_id(char *name, u32 id)
  59 {
  60         int ret = -1;
  61         unsigned int i = 0;
  62         unsigned int j = 0;
  63         unsigned int dups = 0;
  64
  65         unsigned char matched[count_sys_specs()];
  66
  67         while (ppc_sys_specs[i].ppc_sys_name[0]) {
  68                 if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name))
  69                         matched[j++] = i;
  70                 i++;
  71         }
  72         if (j != 0) {
  73                 for (i = 0; i < j; i++) {
  74                         if ((ppc_sys_specs[matched[i]].mask & id) ==
  75                             ppc_sys_specs[matched[i]].value) {
  76                                 ret = matched[i];
  77                                 dups++;
  78                         }
  79                 }
  80                 ret = (dups == 1) ? ret : (-1 * dups);
  81         }
  82         return ret;
  83 }
  84
  85 void __init identify_ppc_sys_by_name_and_id(char *name, u32 id)
  86 {
  87         int i = find_chip_by_name_and_id(name, id);
  88         BUG_ON(i < 0);
  89         cur_ppc_sys_spec = &ppc_sys_specs[i];
  90 }
  91
  92 /* Update all memory resources by paddr, call before platform_device_register */
  93 void __init
  94 ppc_sys_fixup_mem_resource(struct platform_device *pdev, phys_addr_t paddr)
  95 {
  96         int i;
  97         for (i = 0; i < pdev->num_resources; i++) {
  98                 struct resource *r = &pdev->resource[i];
  99                 if ((r->flags & IORESOURCE_MEM) == IORESOURCE_MEM) {
 100                         r->start += paddr;
 101                         r->end += paddr;
 102                 }
 103         }
 104 }
 105
 106 /* Get platform_data pointer out of platform device, call before platform_device_register */
 107 void *__init ppc_sys_get_pdata(enum ppc_sys_devices dev)
 108 {
 109         return ppc_sys_platform_devices[dev].dev.platform_data;
 110 }
 111
 112 void ppc_sys_device_remove(enum ppc_sys_devices dev)
 113 {
 114         unsigned int i;
 115
 116         if (ppc_sys_inited) {
 117                 platform_device_unregister(&ppc_sys_platform_devices[dev]);
 118         } else {
 119                 if (cur_ppc_sys_spec == NULL)
 120                         return;
 121                 for (i = 0; i < cur_ppc_sys_spec->num_devices; i++)
 122                         if (cur_ppc_sys_spec->device_list[i] == dev)
 123                                 cur_ppc_sys_spec->device_list[i] = -1;
 124         }
 125 }
 126
 127 static int __init ppc_sys_init(void)
 128 {
 129         unsigned int i, dev_id, ret = 0;
 130
 131         BUG_ON(cur_ppc_sys_spec == NULL);
 132
 133         for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) {
 134                 dev_id = cur_ppc_sys_spec->device_list[i];
 135                 if (dev_id != -1) {
 136                         if (ppc_sys_device_fixup != NULL)
 137                                 ppc_sys_device_fixup(&ppc_sys_platform_devices
 138                                                      [dev_id]);
 139                         if (platform_device_register
 140                             (&ppc_sys_platform_devices[dev_id])) {
 141                                 ret = 1;
 142                                 printk(KERN_ERR
 143                                        "unable to register device %d\n",
 144                                        dev_id);
 145                         }
 146                 }
 147         }
 148
 149         ppc_sys_inited = 1;
 150         return ret;
 151 }
 152
 153 subsys_initcall(ppc_sys_init);