diff options
| -rw-r--r-- | sound/firewire/dice/dice-transaction.c | 90 | ||||
| -rw-r--r-- | sound/firewire/dice/dice.c | 72 |
2 files changed, 78 insertions, 84 deletions
diff --git a/sound/firewire/dice/dice-transaction.c b/sound/firewire/dice/dice-transaction.c index aee7461..fdb7841 100644 --- a/sound/firewire/dice/dice-transaction.c +++ b/sound/firewire/dice/dice-transaction.c @@ -331,39 +331,60 @@ int snd_dice_transaction_reinit(struct snd_dice *dice) return register_notification_address(dice, false); } -int snd_dice_transaction_init(struct snd_dice *dice) +static int get_subaddrs(struct snd_dice *dice) { - struct fw_address_handler *handler = &dice->notification_handler; + static const int min_values[10] = { + 10, 0x64 / 4, + 10, 0x18 / 4, + 10, 0x18 / 4, + 0, 0, + 0, 0, + }; __be32 *pointers; + __be32 version; + u32 data; + unsigned int i; int err; - /* Use the same way which dice_interface_check() does. */ - pointers = kmalloc(sizeof(__be32) * 10, GFP_KERNEL); + pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32), + GFP_KERNEL); if (pointers == NULL) return -ENOMEM; - /* Get offsets for sub-addresses */ + /* + * Check that the sub address spaces exist and are located inside the + * private address space. The minimum values are chosen so that all + * minimally required registers are included. + */ err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, - DICE_PRIVATE_SPACE, - pointers, sizeof(__be32) * 10, 0); + DICE_PRIVATE_SPACE, pointers, + sizeof(__be32) * ARRAY_SIZE(min_values), 0); if (err < 0) goto end; - /* Allocation callback in address space over host controller */ - handler->length = 4; - handler->address_callback = dice_notification; - handler->callback_data = dice; - err = fw_core_add_address_handler(handler, &fw_high_memory_region); - if (err < 0) { - handler->callback_data = NULL; - goto end; + for (i = 0; i < ARRAY_SIZE(min_values); ++i) { + data = be32_to_cpu(pointers[i]); + if (data < min_values[i] || data >= 0x40000) { + err = -ENODEV; + goto end; + } } - /* Register the address space */ - err = register_notification_address(dice, true); - if (err < 0) { - fw_core_remove_address_handler(handler); - handler->callback_data = NULL; + /* + * Check that the implemented DICE driver specification major version + * number matches. + */ + err = snd_fw_transaction(dice->unit, TCODE_READ_QUADLET_REQUEST, + DICE_PRIVATE_SPACE + + be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION, + &version, sizeof(version), 0); + if (err < 0) + goto end; + + if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) { + dev_err(&dice->unit->device, + "unknown DICE version: 0x%08x\n", be32_to_cpu(version)); + err = -ENODEV; goto end; } @@ -380,3 +401,32 @@ end: kfree(pointers); return err; } + +int snd_dice_transaction_init(struct snd_dice *dice) +{ + struct fw_address_handler *handler = &dice->notification_handler; + int err; + + err = get_subaddrs(dice); + if (err < 0) + return err; + + /* Allocation callback in address space over host controller */ + handler->length = 4; + handler->address_callback = dice_notification; + handler->callback_data = dice; + err = fw_core_add_address_handler(handler, &fw_high_memory_region); + if (err < 0) { + handler->callback_data = NULL; + return err; + } + + /* Register the address space */ + err = register_notification_address(dice, true); + if (err < 0) { + fw_core_remove_address_handler(handler); + handler->callback_data = NULL; + } + + return err; +} diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c index 0cda05c..26271cc 100644 --- a/sound/firewire/dice/dice.c +++ b/sound/firewire/dice/dice.c @@ -18,27 +18,12 @@ MODULE_LICENSE("GPL v2"); #define WEISS_CATEGORY_ID 0x00 #define LOUD_CATEGORY_ID 0x10 -static int dice_interface_check(struct fw_unit *unit) +static int check_dice_category(struct fw_unit *unit) { - static const int min_values[10] = { - 10, 0x64 / 4, - 10, 0x18 / 4, - 10, 0x18 / 4, - 0, 0, - 0, 0, - }; struct fw_device *device = fw_parent_device(unit); struct fw_csr_iterator it; - int key, val, vendor = -1, model = -1, err; - unsigned int category, i; - __be32 *pointers; - u32 value; - __be32 version; - - pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32), - GFP_KERNEL); - if (pointers == NULL) - return -ENOMEM; + int key, val, vendor = -1, model = -1; + unsigned int category; /* * Check that GUID and unit directory are constructed according to DICE @@ -64,51 +49,10 @@ static int dice_interface_check(struct fw_unit *unit) else category = DICE_CATEGORY_ID; if (device->config_rom[3] != ((vendor << 8) | category) || - device->config_rom[4] >> 22 != model) { - err = -ENODEV; - goto end; - } - - /* - * Check that the sub address spaces exist and are located inside the - * private address space. The minimum values are chosen so that all - * minimally required registers are included. - */ - err = snd_fw_transaction(unit, TCODE_READ_BLOCK_REQUEST, - DICE_PRIVATE_SPACE, pointers, - sizeof(__be32) * ARRAY_SIZE(min_values), 0); - if (err < 0) { - err = -ENODEV; - goto end; - } - for (i = 0; i < ARRAY_SIZE(min_values); ++i) { - value = be32_to_cpu(pointers[i]); - if (value < min_values[i] || value >= 0x40000) { - err = -ENODEV; - goto end; - } - } + device->config_rom[4] >> 22 != model) + return -ENODEV; - /* - * Check that the implemented DICE driver specification major version - * number matches. - */ - err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, - DICE_PRIVATE_SPACE + - be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION, - &version, 4, 0); - if (err < 0) { - err = -ENODEV; - goto end; - } - if ((version & cpu_to_be32(0xff000000)) != cpu_to_be32(0x01000000)) { - dev_err(&unit->device, - "unknown DICE version: 0x%08x\n", be32_to_cpu(version)); - err = -ENODEV; - goto end; - } -end: - return err; + return 0; } static int highest_supported_mode_rate(struct snd_dice *dice, @@ -254,9 +198,9 @@ static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) struct snd_dice *dice; int err; - err = dice_interface_check(unit); + err = check_dice_category(unit); if (err < 0) - goto end; + return -ENODEV; err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*dice), &card); |