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config_roms.c

/*
 * IEEE 1394 for Linux
 *
 * ConfigROM  entries
 *
 * Copyright (C) 2004 Ben Collins
 *
 * This code is licensed under the GPL.  See the file COPYING in the root
 * directory of the kernel sources for details.
 */

#include <linux/types.h>

#include "csr1212.h"
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394_core.h"
#include "highlevel.h"
#include "csr.h"
#include "config_roms.h"

struct hpsb_config_rom_entry {
      const char *name;

      /* Base initialization, called at module load */
      int (*init)(void);

      /* Cleanup called at module exit */
      void (*cleanup)(void);

      /* The flag added to host->config_roms */
      unsigned int flag;
};

/* The default host entry. This must succeed. */
int hpsb_default_host_entry(struct hpsb_host *host)
{
      struct csr1212_keyval *root;
      struct csr1212_keyval *vend_id = NULL;
      struct csr1212_keyval *text = NULL;
      char csr_name[128];
      int ret;

      sprintf(csr_name, "Linux - %s", host->driver->name);
      root = host->csr.rom->root_kv;

      vend_id = csr1212_new_immediate(CSR1212_KV_ID_VENDOR, host->csr.guid_hi >> 8);
      text = csr1212_new_string_descriptor_leaf(csr_name);

      if (!vend_id || !text) {
            if (vend_id)
                  csr1212_release_keyval(vend_id);
            if (text)
                  csr1212_release_keyval(text);
            csr1212_destroy_csr(host->csr.rom);
            return -ENOMEM;
      }

      csr1212_associate_keyval(vend_id, text);
      csr1212_release_keyval(text);
      ret = csr1212_attach_keyval_to_directory(root, vend_id);
      csr1212_release_keyval(vend_id);
      if (ret != CSR1212_SUCCESS) {
            csr1212_destroy_csr(host->csr.rom);
            return -ENOMEM;
      }

      host->update_config_rom = 1;

      return 0;
}


#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
#include "eth1394.h"

static struct csr1212_keyval *ip1394_ud;

static int config_rom_ip1394_init(void)
{
      struct csr1212_keyval *spec_id = NULL;
      struct csr1212_keyval *spec_desc = NULL;
      struct csr1212_keyval *ver = NULL;
      struct csr1212_keyval *ver_desc = NULL;
      int ret = -ENOMEM;

      ip1394_ud = csr1212_new_directory(CSR1212_KV_ID_UNIT);

      spec_id = csr1212_new_immediate(CSR1212_KV_ID_SPECIFIER_ID,
                              ETHER1394_GASP_SPECIFIER_ID);
      spec_desc = csr1212_new_string_descriptor_leaf("IANA");
      ver = csr1212_new_immediate(CSR1212_KV_ID_VERSION,
                            ETHER1394_GASP_VERSION);
      ver_desc = csr1212_new_string_descriptor_leaf("IPv4");

      if (!ip1394_ud || !spec_id || !spec_desc || !ver || !ver_desc)
            goto ip1394_fail;

      csr1212_associate_keyval(spec_id, spec_desc);
      csr1212_associate_keyval(ver, ver_desc);
      if (csr1212_attach_keyval_to_directory(ip1394_ud, spec_id)
                  == CSR1212_SUCCESS &&
          csr1212_attach_keyval_to_directory(ip1394_ud, ver)
                  == CSR1212_SUCCESS)
            ret = 0;

ip1394_fail:
      if (ret && ip1394_ud) {
            csr1212_release_keyval(ip1394_ud);
            ip1394_ud = NULL;
      }

      if (spec_id)
            csr1212_release_keyval(spec_id);
      if (spec_desc)
            csr1212_release_keyval(spec_desc);
      if (ver)
            csr1212_release_keyval(ver);
      if (ver_desc)
            csr1212_release_keyval(ver_desc);

      return ret;
}

static void config_rom_ip1394_cleanup(void)
{
      if (ip1394_ud) {
            csr1212_release_keyval(ip1394_ud);
            ip1394_ud = NULL;
      }
}

int hpsb_config_rom_ip1394_add(struct hpsb_host *host)
{
      if (!ip1394_ud)
            return -ENODEV;

      if (csr1212_attach_keyval_to_directory(host->csr.rom->root_kv,
                                     ip1394_ud) != CSR1212_SUCCESS)
            return -ENOMEM;

      host->config_roms |= HPSB_CONFIG_ROM_ENTRY_IP1394;
      host->update_config_rom = 1;
      return 0;
}
EXPORT_SYMBOL_GPL(hpsb_config_rom_ip1394_add);

void hpsb_config_rom_ip1394_remove(struct hpsb_host *host)
{
      csr1212_detach_keyval_from_directory(host->csr.rom->root_kv, ip1394_ud);
      host->config_roms &= ~HPSB_CONFIG_ROM_ENTRY_IP1394;
      host->update_config_rom = 1;
}
EXPORT_SYMBOL_GPL(hpsb_config_rom_ip1394_remove);

static struct hpsb_config_rom_entry ip1394_entry = {
      .name       = "ip1394",
      .init       = config_rom_ip1394_init,
      .cleanup    = config_rom_ip1394_cleanup,
      .flag       = HPSB_CONFIG_ROM_ENTRY_IP1394,
};

#endif /* CONFIG_IEEE1394_ETH1394_ROM_ENTRY */

static struct hpsb_config_rom_entry *const config_rom_entries[] = {
#ifdef CONFIG_IEEE1394_ETH1394_ROM_ENTRY
      &ip1394_entry,
#endif
};

/* Initialize all config roms */
int hpsb_init_config_roms(void)
{
      int i, error = 0;

      for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
            if (config_rom_entries[i]->init()) {
                  HPSB_ERR("Failed to initialize config rom entry `%s'",
                         config_rom_entries[i]->name);
                  error = -1;
            }

      return error;
}

/* Cleanup all config roms */
void hpsb_cleanup_config_roms(void)
{
      int i;

      for (i = 0; i < ARRAY_SIZE(config_rom_entries); i++)
            config_rom_entries[i]->cleanup();
}

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