drivers/ieee1394/config_roms.c

   1 /*
   2  * IEEE 1394 for Linux
   3  *
   4  * ConfigROM  entries
   5  *
   6  * Copyright (C) 2004 Ben Collins
   7  *
   8  * This code is licensed under the GPL.  See the file COPYING in the root
   9  * directory of the kernel sources for details.
  10  */
  11
  12 #include <linux/types.h>
  13
  14 #include "csr1212.h"
  15 #include "ieee1394.h"
  16 #include "ieee1394_types.h"
  17 #include "hosts.h"
  18 #include "ieee1394_core.h"
  19 #include "highlevel.h"
  20 #include "csr.h"
  21 #include "config_roms.h"
  22
  23 struct hpsb_config_rom_entry {
  24         const char *name;
  25
  26         /* Base initialization, called at module load */
  27         int (*init)(void);
  28
  29         /* Cleanup called at module exit */
  30         void (*cleanup)(void);
  31
  32         /* The flag added to host->config_roms */
  33         unsigned int flag;
  34 };
  35
  36 /* The default host entry. This must succeed. */
  37 int hpsb_default_host_entry(struct hpsb_host *host)
  38 {
  39         struct csr1212_keyval *root;
  40         struct csr1212_keyval *vend_id = NULL;
  41         struct csr1212_keyval *text = NULL;
  42         char csr_name[128];
  43         int ret;
  44
  45         sprintf(csr_name, "Linux - %s", host->driver->name);
  46         root = host->csr.rom->root_kv;
  47
  48         vend_id = csr1212_new_immediate(CSR1212_KV_ID_VENDOR, host->csr.guid_hi >> 8);
  49         text = csr1212_new_string_descriptor_leaf(csr_name);
  50
  51         if (!vend_id || !text) {
  52                 if (vend_id)
  53                         csr1212_release_keyval(vend_id);
  54                 if (text)
  55                         csr1212_release_keyval(text);
  56                 csr1212_destroy_csr(host->csr.rom);
  57                 return -ENOMEM;
  58         }
  59
  60         csr1212_associate_keyval(vend_id, text);
  61         csr1212_release_keyval(text);
  62         ret = csr1212_attach_keyval_to_directory(root, vend_id);
  63         csr1212_release_keyval(vend_id);
  64         if (ret != CSR1212_SUCCESS) {
  65                 csr1212_destroy_csr(host->csr.rom);
  66                 return -ENOMEM;
  67         }
  68
  69         host->update_config_rom = 1;
  70
  71         return 0;
  72 }
  73
  74
  75 #ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
  76 #include "eth1394.h"
  77
  78 static struct csr1212_keyval *ip1394_ud;
  79
  80 static int config_rom_ip1394_init(void)
  81 {
  82         struct csr1212_keyval *spec_id = NULL;
  83         struct csr1212_keyval *spec_desc = NULL;
  84         struct csr1212_keyval *ver = NULL;
  85         struct csr1212_keyval *ver_desc = NULL;
  86         int ret = -ENOMEM;
  87
  88         ip1394_ud = csr1212_new_directory(CSR1212_KV_ID_UNIT);
  89
  90         spec_id = csr1212_new_immediate(CSR1212_KV_ID_SPECIFIER_ID,
  91                                         ETHER1394_GASP_SPECIFIER_ID);
  92         spec_desc = csr1212_new_string_descriptor_leaf("IANA");
  93         ver = csr1212_new_immediate(CSR1212_KV_ID_VERSION,
  94                                     ETHER1394_GASP_VERSION);
  95         ver_desc = csr1212_new_string_descriptor_leaf("IPv4");
  96
  97         if (!ip1394_ud || !spec_id || !spec_desc || !ver || !ver_desc)
  98                 goto ip1394_fail;
  99
 100         csr1212_associate_keyval(spec_id, spec_desc);
 101         csr1212_associate_keyval(ver, ver_desc);
 102         if (csr1212_attach_keyval_to_directory(ip1394_ud, spec_id)
 103                         == CSR1212_SUCCESS &&
 104             csr1212_attach_keyval_to_directory(ip1394_ud, ver)
 105                         == CSR1212_SUCCESS)
 106                 ret = 0;
 107
 108 ip1394_fail:
 109         if (ret && ip1394_ud) {
 110                 csr1212_release_keyval(ip1394_ud);
 111                 ip1394_ud = NULL;
 112         }
 113
 114         if (spec_id)
 115                 csr1212_release_keyval(spec_id);
 116         if (spec_desc)
 117                 csr1212_release_keyval(spec_desc);
 118         if (ver)
 119                 csr1212_release_keyval(ver);
 120         if (ver_desc)
 121                 csr1212_release_keyval(ver_desc);
 122
 123         return ret;
 124 }
 125
 126 static void config_rom_ip1394_cleanup(void)
 127 {
 128         if (ip1394_ud) {
 129                 csr1212_release_keyval(ip1394_ud);
 130                 ip1394_ud = NULL;
 131         }
 132 }
 133
 134 int hpsb_config_rom_ip1394_add(struct hpsb_host *host)
 135 {
 136         if (!ip1394_ud)
 137                 return -ENODEV;
 138
 139         if (csr1212_attach_keyval_to_directory(host->csr.rom->root_kv,
 140                                                ip1394_ud) != CSR1212_SUCCESS)
 141                 return -ENOMEM;
 142
 143         host->config_roms |= HPSB_CONFIG_ROM_ENTRY_IP1394;
 144         host->update_config_rom = 1;
 145         return 0;
 146 }
 147 EXPORT_SYMBOL_GPL(hpsb_config_rom_ip1394_add);
 148
 149 void hpsb_config_rom_ip1394_remove(struct hpsb_host *host)
 150 {
 151         csr1212_detach_keyval_from_directory(host->csr.rom->root_kv, ip1394_ud);
 152         host->config_roms &= ~HPSB_CONFIG_ROM_ENTRY_IP1394;
 153         host->update_config_rom = 1;
 154 }
 155 EXPORT_SYMBOL_GPL(hpsb_config_rom_ip1394_remove);
 156
 157 static struct hpsb_config_rom_entry ip1394_entry = {
 158         .name           = "ip1394",
 159         .init           = config_rom_ip1394_init,
 160         .cleanup        = config_rom_ip1394_cleanup,
 161         .flag           = HPSB_CONFIG_ROM_ENTRY_IP1394,
 162 };
 163
 164 #endif /* CONFIG_IEEE1394_ETH1394_ROM_ENTRY */
 165
 166 static struct hpsb_config_rom_entry *const config_rom_entries[] = {
 167 #ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
 168         &ip1394_entry,
 169 #endif
 170 };
 171
 172 /* Initialize all config roms */
 173 int hpsb_init_config_roms(void)
 174 {
 175         int i, error = 0;
 176
 177         for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
 178                 if (config_rom_entries[i]->init()) {
 179                         HPSB_ERR("Failed to initialize config rom entry `%s'",
 180                                  config_rom_entries[i]->name);
 181                         error = -1;
 182                 }
 183
 184         return error;
 185 }
 186
 187 /* Cleanup all config roms */
 188 void hpsb_cleanup_config_roms(void)
 189 {
 190         int i;
 191
 192         for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
 193                 config_rom_entries[i]->cleanup();
 194 }