diff options
| -rw-r--r-- | sound/firewire/dice/Makefile | 2 | ||||
| -rw-r--r-- | sound/firewire/dice/dice-transaction.c | 387 | ||||
| -rw-r--r-- | sound/firewire/dice/dice.c | 487 | ||||
| -rw-r--r-- | sound/firewire/dice/dice.h | 160 |
4 files changed, 653 insertions, 383 deletions
diff --git a/sound/firewire/dice/Makefile b/sound/firewire/dice/Makefile index af05d7e..9f473cb 100644 --- a/sound/firewire/dice/Makefile +++ b/sound/firewire/dice/Makefile @@ -1,2 +1,2 @@ -snd-dice-objs := dice.o +snd-dice-objs := dice-transaction.o dice.o obj-m += snd-dice.o diff --git a/sound/firewire/dice/dice-transaction.c b/sound/firewire/dice/dice-transaction.c new file mode 100644 index 0000000..a9b98e0 --- /dev/null +++ b/sound/firewire/dice/dice-transaction.c @@ -0,0 +1,387 @@ +/* + * dice_transaction.c - a part of driver for Dice based devices + * + * Copyright (c) Clemens Ladisch + * Copyright (c) 2014 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include "dice.h" + +#define NOTIFICATION_TIMEOUT_MS 100 + +static u64 get_subaddr(struct snd_dice *dice, enum snd_dice_addr_type type, + u64 offset) +{ + switch (type) { + case SND_DICE_ADDR_TYPE_TX: + offset += dice->tx_offset; + break; + case SND_DICE_ADDR_TYPE_RX: + offset += dice->rx_offset; + break; + case SND_DICE_ADDR_TYPE_SYNC: + offset += dice->sync_offset; + break; + case SND_DICE_ADDR_TYPE_RSRV: + offset += dice->rsrv_offset; + break; + case SND_DICE_ADDR_TYPE_GLOBAL: + default: + offset += dice->global_offset; + break; + }; + offset += DICE_PRIVATE_SPACE; + return offset; +} + +int snd_dice_transaction_write(struct snd_dice *dice, + enum snd_dice_addr_type type, + unsigned int offset, void *buf, unsigned int len) +{ + return snd_fw_transaction(dice->unit, + (len == 4) ? TCODE_WRITE_QUADLET_REQUEST : + TCODE_WRITE_BLOCK_REQUEST, + get_subaddr(dice, type, offset), buf, len, 0); +} + +int snd_dice_transaction_read(struct snd_dice *dice, + enum snd_dice_addr_type type, unsigned int offset, + void *buf, unsigned int len) +{ + return snd_fw_transaction(dice->unit, + (len == 4) ? TCODE_READ_QUADLET_REQUEST : + TCODE_READ_BLOCK_REQUEST, + get_subaddr(dice, type, offset), buf, len, 0); +} + +static unsigned int get_clock_info(struct snd_dice *dice, __be32 *info) +{ + return snd_dice_transaction_read_global(dice, GLOBAL_CLOCK_SELECT, + info, 4); +} + +static int set_clock_info(struct snd_dice *dice, + unsigned int rate, unsigned int source) +{ + unsigned int retries = 3; + unsigned int i; + __be32 info; + u32 mask; + u32 clock; + int err; +retry: + err = get_clock_info(dice, &info); + if (err < 0) + goto end; + + clock = be32_to_cpu(info); + if (source != UINT_MAX) { + mask = CLOCK_SOURCE_MASK; + clock &= ~mask; + clock |= source; + } + if (rate != UINT_MAX) { + for (i = 0; i < ARRAY_SIZE(snd_dice_rates); i++) { + if (snd_dice_rates[i] == rate) + break; + } + if (i == ARRAY_SIZE(snd_dice_rates)) { + err = -EINVAL; + goto end; + } + + mask = CLOCK_RATE_MASK; + clock &= ~mask; + clock |= i << CLOCK_RATE_SHIFT; + } + info = cpu_to_be32(clock); + + if (completion_done(&dice->clock_accepted)) + reinit_completion(&dice->clock_accepted); + + err = snd_dice_transaction_write_global(dice, GLOBAL_CLOCK_SELECT, + &info, 4); + if (err < 0) + goto end; + + /* Timeout means it's invalid request, probably bus reset occurred. */ + if (wait_for_completion_timeout(&dice->clock_accepted, + msecs_to_jiffies(NOTIFICATION_TIMEOUT_MS)) == 0) { + if (retries-- == 0) { + err = -ETIMEDOUT; + goto end; + } + + err = snd_dice_transaction_reinit(dice); + if (err < 0) + goto end; + + msleep(500); /* arbitrary */ + goto retry; + } +end: + return err; +} + +int snd_dice_transaction_get_clock_source(struct snd_dice *dice, + unsigned int *source) +{ + __be32 info; + int err; + + err = get_clock_info(dice, &info); + if (err >= 0) + *source = be32_to_cpu(info) & CLOCK_SOURCE_MASK; + + return err; +} +int snd_dice_transaction_set_clock_source(struct snd_dice *dice, + unsigned int source) +{ + return set_clock_info(dice, UINT_MAX, source); +} + +int snd_dice_transaction_get_rate(struct snd_dice *dice, unsigned int *rate) +{ + __be32 info; + unsigned int index; + int err; + + err = get_clock_info(dice, &info); + if (err < 0) + goto end; + + index = (be32_to_cpu(info) & CLOCK_RATE_MASK) >> CLOCK_RATE_SHIFT; + if (index >= SND_DICE_RATES_COUNT) { + err = -ENOSYS; + goto end; + } + + *rate = snd_dice_rates[index]; +end: + return err; +} +int snd_dice_transaction_set_rate(struct snd_dice *dice, unsigned int rate) +{ + return set_clock_info(dice, rate, UINT_MAX); +} + +int snd_dice_transaction_set_enable(struct snd_dice *dice) +{ + __be32 value; + int err = 0; + + if (dice->global_enabled) + goto end; + + value = cpu_to_be32(1); + err = snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, + get_subaddr(dice, SND_DICE_ADDR_TYPE_GLOBAL, + GLOBAL_ENABLE), + &value, 4, + FW_FIXED_GENERATION | dice->owner_generation); + if (err < 0) + goto end; + + dice->global_enabled = true; +end: + return err; +} + +void snd_dice_transaction_clear_enable(struct snd_dice *dice) +{ + __be32 value; + + value = 0; + snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, + get_subaddr(dice, SND_DICE_ADDR_TYPE_GLOBAL, + GLOBAL_ENABLE), + &value, 4, FW_QUIET | + FW_FIXED_GENERATION | dice->owner_generation); + + dice->global_enabled = false; +} + +static void dice_notification(struct fw_card *card, struct fw_request *request, + int tcode, int destination, int source, + int generation, unsigned long long offset, + void *data, size_t length, void *callback_data) +{ + struct snd_dice *dice = callback_data; + u32 bits; + unsigned long flags; + + if (tcode != TCODE_WRITE_QUADLET_REQUEST) { + fw_send_response(card, request, RCODE_TYPE_ERROR); + return; + } + if ((offset & 3) != 0) { + fw_send_response(card, request, RCODE_ADDRESS_ERROR); + return; + } + + bits = be32_to_cpup(data); + + spin_lock_irqsave(&dice->lock, flags); + dice->notification_bits |= bits; + spin_unlock_irqrestore(&dice->lock, flags); + + fw_send_response(card, request, RCODE_COMPLETE); + + if (bits & NOTIFY_CLOCK_ACCEPTED) + complete(&dice->clock_accepted); + wake_up(&dice->hwdep_wait); +} + +static int register_notification_address(struct snd_dice *dice, bool retry) +{ + struct fw_device *device = fw_parent_device(dice->unit); + __be64 *buffer; + unsigned int retries; + int err; + + retries = (retry) ? 3 : 0; + + buffer = kmalloc(2 * 8, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + for (;;) { + buffer[0] = cpu_to_be64(OWNER_NO_OWNER); + buffer[1] = cpu_to_be64( + ((u64)device->card->node_id << OWNER_NODE_SHIFT) | + dice->notification_handler.offset); + + dice->owner_generation = device->generation; + smp_rmb(); /* node_id vs. generation */ + err = snd_fw_transaction(dice->unit, TCODE_LOCK_COMPARE_SWAP, + get_subaddr(dice, + SND_DICE_ADDR_TYPE_GLOBAL, + GLOBAL_OWNER), + buffer, 2 * 8, + FW_FIXED_GENERATION | + dice->owner_generation); + if (err == 0) { + /* success */ + if (buffer[0] == cpu_to_be64(OWNER_NO_OWNER)) + break; + /* The address seems to be already registered. */ + if (buffer[0] == buffer[1]) + break; + + dev_err(&dice->unit->device, + "device is already in use\n"); + err = -EBUSY; + } + if (err != -EAGAIN || retries-- > 0) + break; + + msleep(20); + } + + kfree(buffer); + + if (err < 0) + dice->owner_generation = -1; + + return err; +} + +static void unregister_notification_address(struct snd_dice *dice) +{ + struct fw_device *device = fw_parent_device(dice->unit); + __be64 *buffer; + + buffer = kmalloc(2 * 8, GFP_KERNEL); + if (buffer == NULL) + return; + + buffer[0] = cpu_to_be64( + ((u64)device->card->node_id << OWNER_NODE_SHIFT) | + dice->notification_handler.offset); + buffer[1] = cpu_to_be64(OWNER_NO_OWNER); + snd_fw_transaction(dice->unit, TCODE_LOCK_COMPARE_SWAP, + get_subaddr(dice, SND_DICE_ADDR_TYPE_GLOBAL, + GLOBAL_OWNER), + buffer, 2 * 8, FW_QUIET | + FW_FIXED_GENERATION | dice->owner_generation); + + kfree(buffer); + + dice->owner_generation = -1; +} + +void snd_dice_transaction_destroy(struct snd_dice *dice) +{ + struct fw_address_handler *handler = &dice->notification_handler; + + if (handler->callback_data == NULL) + return; + + unregister_notification_address(dice); + + fw_core_remove_address_handler(handler); + handler->callback_data = NULL; +} + +int snd_dice_transaction_reinit(struct snd_dice *dice) +{ + struct fw_address_handler *handler = &dice->notification_handler; + + if (handler->callback_data == NULL) + return -EINVAL; + + return register_notification_address(dice, false); +} + +int snd_dice_transaction_init(struct snd_dice *dice) +{ + struct fw_address_handler *handler = &dice->notification_handler; + __be32 *pointers; + int err; + + /* Use the same way which dice_interface_check() does. */ + pointers = kmalloc(sizeof(__be32) * 10, GFP_KERNEL); + if (pointers == NULL) + return -ENOMEM; + + /* Get offsets for sub-addresses */ + err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, + DICE_PRIVATE_SPACE, + pointers, sizeof(__be32) * 10, 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; + } + + /* Register the address space */ + err = register_notification_address(dice, true); + if (err < 0) { + fw_core_remove_address_handler(handler); + handler->callback_data = NULL; + goto end; + } + + dice->global_offset = be32_to_cpu(pointers[0]) * 4; + dice->tx_offset = be32_to_cpu(pointers[2]) * 4; + dice->rx_offset = be32_to_cpu(pointers[4]) * 4; + dice->sync_offset = be32_to_cpu(pointers[6]) * 4; + dice->rsrv_offset = be32_to_cpu(pointers[8]) * 4; + + /* Set up later. */ + if (be32_to_cpu(pointers[1]) * 4 >= GLOBAL_CLOCK_CAPABILITIES + 4) + dice->clock_caps = 1; +end: + kfree(pointers); + return err; +} diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c index d3ec778..dd62316 100644 --- a/sound/firewire/dice/dice.c +++ b/sound/firewire/dice/dice.c @@ -5,60 +5,13 @@ * Licensed under the terms of the GNU General Public License, version 2. */ -#include <linux/compat.h> -#include <linux/completion.h> -#include <linux/delay.h> -#include <linux/device.h> -#include <linux/firewire.h> -#include <linux/firewire-constants.h> -#include <linux/jiffies.h> -#include <linux/module.h> -#include <linux/mod_devicetable.h> -#include <linux/mutex.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/wait.h> -#include <sound/control.h> -#include <sound/core.h> -#include <sound/firewire.h> -#include <sound/hwdep.h> -#include <sound/info.h> -#include <sound/initval.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include "../amdtp.h" -#include "../iso-resources.h" -#include "../lib.h" -#include "dice-interface.h" - - -struct snd_dice { - struct snd_card *card; - struct fw_unit *unit; - spinlock_t lock; - struct mutex mutex; - unsigned int global_offset; - unsigned int rx_offset; - unsigned int clock_caps; - unsigned int rx_channels[3]; - unsigned int rx_midi_ports[3]; - struct fw_address_handler notification_handler; - int owner_generation; - int dev_lock_count; /* > 0 driver, < 0 userspace */ - bool dev_lock_changed; - bool global_enabled; - struct completion clock_accepted; - wait_queue_head_t hwdep_wait; - u32 notification_bits; - struct fw_iso_resources rx_resources; - struct amdtp_stream rx_stream; -}; +#include "dice.h" MODULE_DESCRIPTION("DICE driver"); MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>"); MODULE_LICENSE("GPL v2"); -static const unsigned int dice_rates[] = { +const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT] = { /* mode 0 */ [0] = 32000, [1] = 44100, @@ -75,8 +28,8 @@ static unsigned int rate_to_index(unsigned int rate) { unsigned int i; - for (i = 0; i < ARRAY_SIZE(dice_rates); ++i) - if (dice_rates[i] == rate) + for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) + if (snd_dice_rates[i] == rate) return i; return 0; @@ -128,192 +81,6 @@ out: spin_unlock_irq(&dice->lock); } -static inline u64 global_address(struct snd_dice *dice, unsigned int offset) -{ - return DICE_PRIVATE_SPACE + dice->global_offset + offset; -} - -/* TODO: rx index */ -static inline u64 rx_address(struct snd_dice *dice, unsigned int offset) -{ - return DICE_PRIVATE_SPACE + dice->rx_offset + offset; -} - -static int dice_owner_set(struct snd_dice *dice) -{ - struct fw_device *device = fw_parent_device(dice->unit); - __be64 *buffer; - int err, errors = 0; - - buffer = kmalloc(2 * 8, GFP_KERNEL); - if (!buffer) - return -ENOMEM; - - for (;;) { - buffer[0] = cpu_to_be64(OWNER_NO_OWNER); - buffer[1] = cpu_to_be64( - ((u64)device->card->node_id << OWNER_NODE_SHIFT) | - dice->notification_handler.offset); - - dice->owner_generation = device->generation; - smp_rmb(); /* node_id vs. generation */ - err = snd_fw_transaction(dice->unit, - TCODE_LOCK_COMPARE_SWAP, - global_address(dice, GLOBAL_OWNER), - buffer, 2 * 8, - FW_FIXED_GENERATION | - dice->owner_generation); - - if (err == 0) { - if (buffer[0] != cpu_to_be64(OWNER_NO_OWNER)) { - dev_err(&dice->unit->device, - "device is already in use\n"); - err = -EBUSY; - } - break; - } - if (err != -EAGAIN || ++errors >= 3) - break; - - msleep(20); - } - - kfree(buffer); - - return err; -} - -static int dice_owner_update(struct snd_dice *dice) -{ - struct fw_device *device = fw_parent_device(dice->unit); - __be64 *buffer; - int err; - - if (dice->owner_generation == -1) - return 0; - - buffer = kmalloc(2 * 8, GFP_KERNEL); - if (!buffer) - return -ENOMEM; - - buffer[0] = cpu_to_be64(OWNER_NO_OWNER); - buffer[1] = cpu_to_be64( - ((u64)device->card->node_id << OWNER_NODE_SHIFT) | - dice->notification_handler.offset); - - dice->owner_generation = device->generation; - smp_rmb(); /* node_id vs. generation */ - err = snd_fw_transaction(dice->unit, TCODE_LOCK_COMPARE_SWAP, - global_address(dice, GLOBAL_OWNER), - buffer, 2 * 8, - FW_FIXED_GENERATION | dice->owner_generation); - - if (err == 0) { - if (buffer[0] != cpu_to_be64(OWNER_NO_OWNER)) { - dev_err(&dice->unit->device, - "device is already in use\n"); - err = -EBUSY; - } - } else if (err == -EAGAIN) { - err = 0; /* try again later */ - } - - kfree(buffer); - - if (err < 0) - dice->owner_generation = -1; - - return err; -} - -static void dice_owner_clear(struct snd_dice *dice) -{ - struct fw_device *device = fw_parent_device(dice->unit); - __be64 *buffer; - - buffer = kmalloc(2 * 8, GFP_KERNEL); - if (!buffer) - return; - - buffer[0] = cpu_to_be64( - ((u64)device->card->node_id << OWNER_NODE_SHIFT) | - dice->notification_handler.offset); - buffer[1] = cpu_to_be64(OWNER_NO_OWNER); - snd_fw_transaction(dice->unit, TCODE_LOCK_COMPARE_SWAP, - global_address(dice, GLOBAL_OWNER), - buffer, 2 * 8, FW_QUIET | - FW_FIXED_GENERATION | dice->owner_generation); - - kfree(buffer); - - dice->owner_generation = -1; -} - -static int dice_enable_set(struct snd_dice *dice) -{ - __be32 value; - int err; - - value = cpu_to_be32(1); - err = snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, - global_address(dice, GLOBAL_ENABLE), - &value, 4, - FW_FIXED_GENERATION | dice->owner_generation); - if (err < 0) - return err; - - dice->global_enabled = true; - - return 0; -} - -static void dice_enable_clear(struct snd_dice *dice) -{ - __be32 value; - - if (!dice->global_enabled) - return; - - value = 0; - snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, - global_address(dice, GLOBAL_ENABLE), - &value, 4, FW_QUIET | - FW_FIXED_GENERATION | dice->owner_generation); - - dice->global_enabled = false; -} - -static void dice_notification(struct fw_card *card, struct fw_request *request, - int tcode, int destination, int source, - int generation, unsigned long long offset, - void *data, size_t length, void *callback_data) -{ - struct snd_dice *dice = callback_data; - u32 bits; - unsigned long flags; - - if (tcode != TCODE_WRITE_QUADLET_REQUEST) { - fw_send_response(card, request, RCODE_TYPE_ERROR); - return; - } - if ((offset & 3) != 0) { - fw_send_response(card, request, RCODE_ADDRESS_ERROR); - return; - } - - bits = be32_to_cpup(data); - - spin_lock_irqsave(&dice->lock, flags); - dice->notification_bits |= bits; - spin_unlock_irqrestore(&dice->lock, flags); - - fw_send_response(card, request, RCODE_COMPLETE); - - if (bits & NOTIFY_CLOCK_ACCEPTED) - complete(&dice->clock_accepted); - wake_up(&dice->hwdep_wait); -} - static int dice_rate_constraint(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { @@ -327,14 +94,14 @@ static int dice_rate_constraint(struct snd_pcm_hw_params *params, }; unsigned int i, mode; - for (i = 0; i < ARRAY_SIZE(dice_rates); ++i) { + for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { mode = rate_index_to_mode(i); if ((dice->clock_caps & (1 << i)) && snd_interval_test(channels, dice->rx_channels[mode])) { allowed_rates.min = min(allowed_rates.min, - dice_rates[i]); + snd_dice_rates[i]); allowed_rates.max = max(allowed_rates.max, - dice_rates[i]); + snd_dice_rates[i]); } } @@ -354,9 +121,9 @@ static int dice_channels_constraint(struct snd_pcm_hw_params *params, }; unsigned int i, mode; - for (i = 0; i < ARRAY_SIZE(dice_rates); ++i) + for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) if ((dice->clock_caps & (1 << i)) && - snd_interval_test(rate, dice_rates[i])) { + snd_interval_test(rate, snd_dice_rates[i])) { mode = rate_index_to_mode(i); allowed_channels.min = min(allowed_channels.min, dice->rx_channels[mode]); @@ -395,10 +162,10 @@ static int dice_open(struct snd_pcm_substream *substream) runtime->hw = hardware; - for (i = 0; i < ARRAY_SIZE(dice_rates); ++i) + for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) if (dice->clock_caps & (1 << i)) runtime->hw.rates |= - snd_pcm_rate_to_rate_bit(dice_rates[i]); + snd_pcm_rate_to_rate_bit(snd_dice_rates[i]); snd_pcm_limit_hw_rates(runtime); for (i = 0; i < 3; ++i) @@ -453,7 +220,7 @@ static int dice_stream_start_packets(struct snd_dice *dice) if (err < 0) return err; - err = dice_enable_set(dice); + err = snd_dice_transaction_set_enable(dice); if (err < 0) { amdtp_stream_stop(&dice->rx_stream); return err; @@ -475,10 +242,8 @@ static int dice_stream_start(struct snd_dice *dice) goto error; channel = cpu_to_be32(dice->rx_resources.channel); - err = snd_fw_transaction(dice->unit, - TCODE_WRITE_QUADLET_REQUEST, - rx_address(dice, RX_ISOCHRONOUS), - &channel, 4, 0); + err = snd_dice_transaction_write_tx(dice, TX_ISOCHRONOUS, + &channel, 4); if (err < 0) goto err_resources; } @@ -491,8 +256,7 @@ static int dice_stream_start(struct snd_dice *dice) err_rx_channel: channel = cpu_to_be32((u32)-1); - snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, - rx_address(dice, RX_ISOCHRONOUS), &channel, 4, 0); + snd_dice_transaction_write_rx(dice, RX_ISOCHRONOUS, &channel, 4); err_resources: fw_iso_resources_free(&dice->rx_resources); error: @@ -502,7 +266,7 @@ error: static void dice_stream_stop_packets(struct snd_dice *dice) { if (amdtp_stream_running(&dice->rx_stream)) { - dice_enable_clear(dice); + snd_dice_transaction_clear_enable(dice); amdtp_stream_stop(&dice->rx_stream); } } @@ -517,33 +281,11 @@ static void dice_stream_stop(struct snd_dice *dice) return; channel = cpu_to_be32((u32)-1); - snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, - rx_address(dice, RX_ISOCHRONOUS), &channel, 4, 0); + snd_dice_transaction_write_rx(dice, RX_ISOCHRONOUS, &channel, 4); fw_iso_resources_free(&dice->rx_resources); } -static int dice_change_rate(struct snd_dice *dice, unsigned int clock_rate) -{ - __be32 value; - int err; - - reinit_completion(&dice->clock_accepted); - - value = cpu_to_be32(clock_rate | CLOCK_SOURCE_ARX1); - err = snd_fw_transaction(dice->unit, TCODE_WRITE_QUADLET_REQUEST, - global_address(dice, GLOBAL_CLOCK_SELECT), - &value, 4, 0); - if (err < 0) - return err; - - if (!wait_for_completion_timeout(&dice->clock_accepted, - msecs_to_jiffies(100))) - dev_warn(&dice->unit->device, "clock change timed out\n"); - - return 0; -} - static int dice_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { @@ -561,8 +303,7 @@ static int dice_hw_params(struct snd_pcm_substream *substream, return err; rate = params_rate(hw_params); - rate_index = rate_to_index(rate); - err = dice_change_rate(dice, rate_index << CLOCK_RATE_SHIFT); + err = snd_dice_transaction_set_rate(dice, rate); if (err < 0) return err; @@ -577,6 +318,7 @@ static int dice_hw_params(struct snd_pcm_substream *substream, * be aligned to SYT_INTERVAL. */ channels = params_channels(hw_params); + rate_index = rate_to_index(rate); if (rate_index > 4) { if (channels > AMDTP_MAX_CHANNELS_FOR_PCM / 2) { err = -ENOSYS; @@ -1118,15 +860,6 @@ static void dice_create_proc(struct snd_dice *dice) snd_info_set_text_ops(entry, dice, dice_proc_read); } -static void dice_card_free(struct snd_card *card) -{ - struct snd_dice *dice = card->private_data; - - amdtp_stream_destroy(&dice->rx_stream); - fw_core_remove_address_handler(&dice->notification_handler); - mutex_destroy(&dice->mutex); -} - #define OUI_WEISS 0x001c6a #define DICE_CATEGORY_ID 0x04 @@ -1143,12 +876,17 @@ static int dice_interface_check(struct fw_unit *unit) }; struct fw_device *device = fw_parent_device(unit); struct fw_csr_iterator it; - int key, value, vendor = -1, model = -1, err; + int key, val, vendor = -1, model = -1, err; unsigned int category, i; - __be32 pointers[ARRAY_SIZE(min_values)]; + __be32 *pointers, value; __be32 tx_data[4]; __be32 version; + pointers = kmalloc_array(ARRAY_SIZE(min_values), sizeof(__be32), + GFP_KERNEL); + if (pointers == NULL) + return -ENOMEM; + /* * Check that GUID and unit directory are constructed according to DICE * rules, i.e., that the specifier ID is the GUID's OUI, and that the @@ -1156,13 +894,13 @@ static int dice_interface_check(struct fw_unit *unit) * ID, and a 22-bit serial number. */ fw_csr_iterator_init(&it, unit->directory); - while (fw_csr_iterator_next(&it, &key, &value)) { + while (fw_csr_iterator_next(&it, &key, &val)) { switch (key) { case CSR_SPECIFIER_ID: - vendor = value; + vendor = val; break; case CSR_MODEL: - model = value; + model = val; break; } } @@ -1171,8 +909,10 @@ 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) - return -ENODEV; + device->config_rom[4] >> 22 != model) { + err = -ENODEV; + goto end; + } /* * Check that the sub address spaces exist and are located inside the @@ -1180,14 +920,18 @@ static int dice_interface_check(struct fw_unit *unit) * minimally required registers are included. */ err = snd_fw_transaction(unit, TCODE_READ_BLOCK_REQUEST, - DICE_PRIVATE_SPACE, - pointers, sizeof(pointers), 0); - if (err < 0) - return -ENODEV; - for (i = 0; i < ARRAY_SIZE(pointers); ++i) { + 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) - return -ENODEV; + if (value < min_values[i] || value >= 0x40000) { + err = -ENODEV; + goto end; + } } /* We support playback only. Let capture devices be handled by FFADO. */ @@ -1195,8 +939,10 @@ static int dice_interface_check(struct fw_unit *unit) DICE_PRIVATE_SPACE + be32_to_cpu(pointers[2]) * 4, tx_data, sizeof(tx_data), 0); - if (err < 0 || (tx_data[0] && tx_data[3])) - return -ENODEV; + if (err < 0 || (tx_data[0] && tx_data[3])) { + err = -ENODEV; + goto end; + } /* * Check that the implemented DICE driver specification major version @@ -1206,22 +952,25 @@ static int dice_interface_check(struct fw_unit *unit) DICE_PRIVATE_SPACE + be32_to_cpu(pointers[0]) * 4 + GLOBAL_VERSION, &version, 4, 0); - if (err < 0) - return -ENODEV; + 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)); - return -ENODEV; + err = -ENODEV; + goto end; } - - return 0; +end: + return err; } static int highest_supported_mode_rate(struct snd_dice *dice, unsigned int mode) { int i; - for (i = ARRAY_SIZE(dice_rates) - 1; i >= 0; --i) + for (i = ARRAY_SIZE(snd_dice_rates) - 1; i >= 0; --i) if ((dice->clock_caps & (1 << i)) && rate_index_to_mode(i) == mode) return i; @@ -1241,13 +990,12 @@ static int dice_read_mode_params(struct snd_dice *dice, unsigned int mode) return 0; } - err = dice_change_rate(dice, rate_index << CLOCK_RATE_SHIFT); + err = snd_dice_transaction_set_rate(dice, snd_dice_rates[rate_index]); if (err < 0) return err; - err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, - rx_address(dice, RX_NUMBER_AUDIO), - values, 2 * 4, 0); + err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO, + values, sizeof(values)); if (err < 0) return err; @@ -1259,25 +1007,14 @@ static int dice_read_mode_params(struct snd_dice *dice, unsigned int mode) static int dice_read_params(struct snd_dice *dice) { - __be32 pointers[6]; __be32 value; int mode, err; - err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, - DICE_PRIVATE_SPACE, - pointers, sizeof(pointers), 0); - if (err < 0) - return err; - - dice->global_offset = be32_to_cpu(pointers[0]) * 4; - dice->rx_offset = be32_to_cpu(pointers[4]) * 4; - /* some very old firmwares don't tell about their clock support */ - if (be32_to_cpu(pointers[1]) * 4 >= GLOBAL_CLOCK_CAPABILITIES + 4) { - err = snd_fw_transaction( - dice->unit, TCODE_READ_QUADLET_REQUEST, - global_address(dice, GLOBAL_CLOCK_CAPABILITIES), - &value, 4, 0); + if (dice->clock_caps > 0) { + err = snd_dice_transaction_read_global(dice, + GLOBAL_CLOCK_CAPABILITIES, + &value, 4); if (err < 0) return err; dice->clock_caps = be32_to_cpu(value); @@ -1310,9 +1047,9 @@ static void dice_card_strings(struct snd_dice *dice) strcpy(card->shortname, "DICE"); BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname)); - err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, - global_address(dice, GLOBAL_NICK_NAME), - card->shortname, sizeof(card->shortname), 0); + err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME, + card->shortname, + sizeof(card->shortname)); if (err >= 0) { /* DICE strings are returned in "always-wrong" endianness */ BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0); @@ -1333,70 +1070,50 @@ static void dice_card_strings(struct snd_dice *dice) strcpy(card->mixername, "DICE"); } +static void dice_card_free(struct snd_card *card) +{ + struct snd_dice *dice = card->private_data; + + snd_dice_transaction_destroy(dice); + mutex_destroy(&dice->mutex); +} + static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) { struct snd_card *card; struct snd_dice *dice; - __be32 clock_sel; int err; err = dice_interface_check(unit); if (err < 0) - return err; + goto end; err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*dice), &card); if (err < 0) - return err; + goto end; dice = card->private_data; dice->card = card; + dice->unit = unit; + card->private_free = dice_card_free; + spin_lock_init(&dice->lock); mutex_init(&dice->mutex); - dice->unit = unit; init_completion(&dice->clock_accepted); init_waitqueue_head(&dice->hwdep_wait); - dice->notification_handler.length = 4; - dice->notification_handler.address_callback = dice_notification; - dice->notification_handler.callback_data = dice; - err = fw_core_add_address_handler(&dice->notification_handler, - &fw_high_memory_region); - if (err < 0) - goto err_mutex; - - err = dice_owner_set(dice); + err = snd_dice_transaction_init(dice); if (err < 0) - goto err_notification_handler; + goto error; err = dice_read_params(dice); if (err < 0) - goto err_owner; - - err = fw_iso_resources_init(&dice->rx_resources, unit); - if (err < 0) - goto err_owner; - dice->rx_resources.channels_mask = 0x00000000ffffffffuLL; - - err = amdtp_stream_init(&dice->rx_stream, unit, AMDTP_OUT_STREAM, - CIP_BLOCKING); - if (err < 0) - goto err_resources; - - card->private_free = dice_card_free; + goto error; dice_card_strings(dice); - err = snd_fw_transaction(unit, TCODE_READ_QUADLET_REQUEST, - global_address(dice, GLOBAL_CLOCK_SELECT), - &clock_sel, 4, 0); - if (err < 0) - goto error; - clock_sel &= cpu_to_be32(~CLOCK_SOURCE_MASK); - clock_sel |= cpu_to_be32(CLOCK_SOURCE_ARX1); - err = snd_fw_transaction(unit, TCODE_WRITE_QUADLET_REQUEST, - global_address(dice, GLOBAL_CLOCK_SELECT), - &clock_sel, 4, 0); + err = snd_dice_transaction_set_clock_source(dice, CLOCK_SOURCE_ARX1); if (err < 0) goto error; @@ -1410,22 +1127,28 @@ static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) dice_create_proc(dice); - err = snd_card_register(card); + err = fw_iso_resources_init(&dice->rx_resources, unit); if (err < 0) goto error; + dice->rx_resources.channels_mask = 0x00000000ffffffffuLL; - dev_set_drvdata(&unit->device, dice); + err = amdtp_stream_init(&dice->rx_stream, unit, AMDTP_OUT_STREAM, + CIP_BLOCKING); + if (err < 0) { + fw_iso_resources_destroy(&dice->rx_resources); + goto error; + } - return 0; + err = snd_card_register(card); + if (err < 0) { + amdtp_stream_destroy(&dice->rx_stream); + fw_iso_resources_destroy(&dice->rx_resources); + goto error; + } -err_resources: - fw_iso_resources_destroy(&dice->rx_resources); -err_owner: - dice_owner_clear(dice); -err_notification_handler: - fw_core_remove_address_handler(&dice->notification_handler); -err_mutex: - mutex_destroy(&dice->mutex); + dev_set_drvdata(&unit->device, dice); +end: + return err; error: snd_card_free(card); return err; @@ -1442,7 +1165,6 @@ static void dice_remove(struct fw_unit *unit) mutex_lock(&dice->mutex); dice_stream_stop(dice); - dice_owner_clear(dice); mutex_unlock(&dice->mutex); @@ -1453,6 +1175,9 @@ static void dice_bus_reset(struct fw_unit *unit) { struct snd_dice *dice = dev_get_drvdata(&unit->device); + /* The handler address register becomes initialized. */ + snd_dice_transaction_reinit(dice); + /* * On a bus reset, the DICE firmware disables streaming and then goes * off contemplating its own navel for hundreds of milliseconds before @@ -1466,10 +1191,8 @@ static void dice_bus_reset(struct fw_unit *unit) mutex_lock(&dice->mutex); dice->global_enabled = false; - dice_stream_stop_packets(dice); - - dice_owner_update(dice); + dice_stream_stop_packets(dice); fw_iso_resources_update(&dice->rx_resources); mutex_unlock(&dice->mutex); diff --git a/sound/firewire/dice/dice.h b/sound/firewire/dice/dice.h new file mode 100644 index 0000000..c756e62 --- /dev/null +++ b/sound/firewire/dice/dice.h @@ -0,0 +1,160 @@ +/* + * dice.h - a part of driver for Dice based devices + * + * Copyright (c) Clemens Ladisch + * Copyright (c) 2014 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#ifndef SOUND_DICE_H_INCLUDED +#define SOUND_DICE_H_INCLUDED + +#include <linux/compat.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/firewire.h> +#include <linux/firewire-constants.h> +#include <linux/jiffies.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/wait.h> + +#include <sound/control.h> +#include <sound/core.h> +#include <sound/firewire.h> +#include <sound/hwdep.h> +#include <sound/info.h> +#include <sound/initval.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> + +#include "../amdtp.h" +#include "../iso-resources.h" +#include "../lib.h" +#include "dice-interface.h" + +struct snd_dice { + struct snd_card *card; + struct fw_unit *unit; + spinlock_t lock; + struct mutex mutex; + + /* Offsets for sub-addresses */ + unsigned int global_offset; + unsigned int rx_offset; + unsigned int tx_offset; + unsigned int sync_offset; + unsigned int rsrv_offset; + + unsigned int clock_caps; + unsigned int rx_channels[3]; + unsigned int rx_midi_ports[3]; + struct fw_address_handler notification_handler; + int owner_generation; + int dev_lock_count; /* > 0 driver, < 0 userspace */ + bool dev_lock_changed; + bool global_enabled; + struct completion clock_accepted; + wait_queue_head_t hwdep_wait; + u32 notification_bits; + struct fw_iso_resources rx_resources; + struct amdtp_stream rx_stream; +}; + +enum snd_dice_addr_type { + SND_DICE_ADDR_TYPE_PRIVATE, + SND_DICE_ADDR_TYPE_GLOBAL, + SND_DICE_ADDR_TYPE_TX, + SND_DICE_ADDR_TYPE_RX, + SND_DICE_ADDR_TYPE_SYNC, + SND_DICE_ADDR_TYPE_RSRV, +}; + +int snd_dice_transaction_write(struct snd_dice *dice, + enum snd_dice_addr_type type, + unsigned int offset, + void *buf, unsigned int len); +int snd_dice_transaction_read(struct snd_dice *dice, + enum snd_dice_addr_type type, unsigned int offset, + void *buf, unsigned int len); + +static inline int snd_dice_transaction_write_global(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_write(dice, + SND_DICE_ADDR_TYPE_GLOBAL, offset, + buf, len); +} +static inline int snd_dice_transaction_read_global(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_read(dice, + SND_DICE_ADDR_TYPE_GLOBAL, offset, + buf, len); +} +static inline int snd_dice_transaction_write_tx(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_TX, offset, + buf, len); +} +static inline int snd_dice_transaction_read_tx(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_TX, offset, + buf, len); +} +static inline int snd_dice_transaction_write_rx(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_RX, offset, + buf, len); +} +static inline int snd_dice_transaction_read_rx(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_RX, offset, + buf, len); +} +static inline int snd_dice_transaction_write_sync(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_write(dice, SND_DICE_ADDR_TYPE_SYNC, offset, + buf, len); +} +static inline int snd_dice_transaction_read_sync(struct snd_dice *dice, + unsigned int offset, + void *buf, unsigned int len) +{ + return snd_dice_transaction_read(dice, SND_DICE_ADDR_TYPE_SYNC, offset, + buf, len); +} + +int snd_dice_transaction_set_clock_source(struct snd_dice *dice, + unsigned int source); +int snd_dice_transaction_get_clock_source(struct snd_dice *dice, + unsigned int *source); +int snd_dice_transaction_set_rate(struct snd_dice *dice, unsigned int rate); +int snd_dice_transaction_get_rate(struct snd_dice *dice, unsigned int *rate); +int snd_dice_transaction_set_enable(struct snd_dice *dice); +void snd_dice_transaction_clear_enable(struct snd_dice *dice); +int snd_dice_transaction_init(struct snd_dice *dice); +int snd_dice_transaction_reinit(struct snd_dice *dice); +void snd_dice_transaction_destroy(struct snd_dice *dice); + +#define SND_DICE_RATES_COUNT 7 +extern const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT]; + +#endif |
