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 <galak@kernel.crashing.org>
   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 <linux/string.h>
  18 #include <asm/ppc_sys.h>
  19
  20 int (*ppc_sys_device_fixup) (struct platform_device * pdev);
  21
  22 static int ppc_sys_inited;
  23
  24 void __init identify_ppc_sys_by_id(u32 id)
  25 {
  26         unsigned int i = 0;
  27         while (1) {
  28                 if ((ppc_sys_specs[i].mask & id) == ppc_sys_specs[i].value)
  29                         break;
  30                 i++;
  31         }
  32
  33         cur_ppc_sys_spec = &ppc_sys_specs[i];
  34
  35         return;
  36 }
  37
  38 void __init identify_ppc_sys_by_name(char *name)
  39 {
  40         unsigned int i = 0;
  41         while (ppc_sys_specs[i].ppc_sys_name[0])
  42         {
  43                 if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name))
  44                         break;
  45                 i++;
  46         }
  47         cur_ppc_sys_spec = &ppc_sys_specs[i];
  48         return;
  49 }
  50
  51 static int __init count_sys_specs(void)
  52 {
  53         int i = 0;
  54         while (ppc_sys_specs[i].ppc_sys_name[0])
  55                 i++;
  56         return i;
  57 }
  58
  59 static int __init find_chip_by_name_and_id(char *name, u32 id)
  60 {
  61         int ret = -1;
  62         unsigned int i = 0;
  63         unsigned int j = 0;
  64         unsigned int dups = 0;
  65
  66         unsigned char matched[count_sys_specs()];
  67
  68         while (ppc_sys_specs[i].ppc_sys_name[0]) {
  69                 if (!strcmp(ppc_sys_specs[i].ppc_sys_name, name))
  70                         matched[j++] = i;
  71                 i++;
  72         }
  73
  74         ret = i;
  75
  76         if (j != 0) {
  77                 for (i = 0; i < j; i++) {
  78                         if ((ppc_sys_specs[matched[i]].mask & id) ==
  79                             ppc_sys_specs[matched[i]].value) {
  80                                 ret = matched[i];
  81                                 dups++;
  82                         }
  83                 }
  84                 ret = (dups == 1) ? ret : (-1 * dups);
  85         }
  86         return ret;
  87 }
  88
  89 void __init identify_ppc_sys_by_name_and_id(char *name, u32 id)
  90 {
  91         int i = find_chip_by_name_and_id(name, id);
  92         BUG_ON(i < 0);
  93         cur_ppc_sys_spec = &ppc_sys_specs[i];
  94 }
  95
  96 /* Update all memory resources by paddr, call before platform_device_register */
  97 void __init
  98 ppc_sys_fixup_mem_resource(struct platform_device *pdev, phys_addr_t paddr)
  99 {
 100         int i;
 101         for (i = 0; i < pdev->num_resources; i++) {
 102                 struct resource *r = &pdev->resource[i];
 103                 if ((r->flags & IORESOURCE_MEM) == IORESOURCE_MEM) {
 104                         r->start += paddr;
 105                         r->end += paddr;
 106                 }
 107         }
 108 }
 109
 110 /* Get platform_data pointer out of platform device, call before platform_device_register */
 111 void *__init ppc_sys_get_pdata(enum ppc_sys_devices dev)
 112 {
 113         return ppc_sys_platform_devices[dev].dev.platform_data;
 114 }
 115
 116 void ppc_sys_device_remove(enum ppc_sys_devices dev)
 117 {
 118         unsigned int i;
 119
 120         if (ppc_sys_inited) {
 121                 platform_device_unregister(&ppc_sys_platform_devices[dev]);
 122         } else {
 123                 if (cur_ppc_sys_spec == NULL)
 124                         return;
 125                 for (i = 0; i < cur_ppc_sys_spec->num_devices; i++)
 126                         if (cur_ppc_sys_spec->device_list[i] == dev)
 127                                 cur_ppc_sys_spec->device_list[i] = -1;
 128         }
 129 }
 130
 131 static int __init ppc_sys_init(void)
 132 {
 133         unsigned int i, dev_id, ret = 0;
 134
 135         BUG_ON(cur_ppc_sys_spec == NULL);
 136
 137         for (i = 0; i < cur_ppc_sys_spec->num_devices; i++) {
 138                 dev_id = cur_ppc_sys_spec->device_list[i];
 139                 if (dev_id != -1) {
 140                         if (ppc_sys_device_fixup != NULL)
 141                                 ppc_sys_device_fixup(&ppc_sys_platform_devices
 142                                                      [dev_id]);
 143                         if (platform_device_register
 144                             (&ppc_sys_platform_devices[dev_id])) {
 145                                 ret = 1;
 146                                 printk(KERN_ERR
 147                                        "unable to register device %d\n",
 148                                        dev_id);
 149                         }
 150                 }
 151         }
 152
 153         ppc_sys_inited = 1;
 154         return ret;
 155 }
 156
 157 subsys_initcall(ppc_sys_init);