In preparation for sample rate selection support, read the stream parameters that might change when running at different sample rates.
Signed-off-by: Clemens Ladisch clemens@ladisch.de --- sound/firewire/dice.c | 92 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 90 insertions(+), 2 deletions(-)
diff --git a/sound/firewire/dice.c b/sound/firewire/dice.c index 49b47ba..e6bba6d 100644 --- a/sound/firewire/dice.c +++ b/sound/firewire/dice.c @@ -6,10 +6,12 @@ */
#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> @@ -37,11 +39,14 @@ struct dice { 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 resources; @@ -53,15 +58,23 @@ MODULE_AUTHOR("Clemens Ladisch clemens@ladisch.de"); MODULE_LICENSE("GPL v2");
static const unsigned int dice_rates[] = { + /* mode 0 */ [0] = 32000, [1] = 44100, [2] = 48000, + /* mode 1 */ [3] = 88200, [4] = 96000, + /* mode 2 */ [5] = 176400, [6] = 192000, };
+static unsigned int rate_index_to_mode(unsigned int rate_index) +{ + return ((int)rate_index - 1) / 2; +} + static void dice_lock_changed(struct dice *dice) { dice->dev_lock_changed = true; @@ -264,6 +277,7 @@ static void dice_notification(struct fw_card *card, struct fw_request *request, void *data, size_t length, void *callback_data) { struct dice *dice = callback_data; + u32 bits; unsigned long flags;
if (tcode != TCODE_WRITE_QUADLET_REQUEST) { @@ -274,10 +288,17 @@ static void dice_notification(struct fw_card *card, struct fw_request *request, fw_send_response(card, request, RCODE_ADDRESS_ERROR); return; } + + bits = be32_to_cpup(data); + spin_lock_irqsave(&dice->lock, flags); - dice->notification_bits |= be32_to_cpup(data); + 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); }
@@ -457,6 +478,26 @@ static void dice_stream_stop(struct dice *dice) fw_iso_resources_free(&dice->resources); }
+static int dice_change_rate(struct dice *dice, unsigned int clock_rate) +{ + __be32 value; + int err; + + INIT_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; + + wait_for_completion_timeout(&dice->clock_accepted, + msecs_to_jiffies(100)); + + return 0; +} + static int dice_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { @@ -831,11 +872,51 @@ static int dice_interface_check(struct fw_unit *unit) return 0; }
+static int highest_supported_mode_rate(struct dice *dice, unsigned int mode) +{ + int i; + + for (i = ARRAY_SIZE(dice_rates) - 1; i >= 0; --i) + if ((dice->clock_caps & (1 << i)) && + rate_index_to_mode(i) == mode) + return i; + + return -1; +} + +static int dice_read_mode_params(struct dice *dice, unsigned int mode) +{ + __be32 values[2]; + int rate_index, err; + + rate_index = highest_supported_mode_rate(dice, mode); + if (rate_index < 0) { + dice->rx_channels[mode] = 0; + dice->rx_midi_ports[mode] = 0; + return 0; + } + + err = dice_change_rate(dice, rate_index << CLOCK_RATE_SHIFT); + 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); + if (err < 0) + return err; + + dice->rx_channels[mode] = be32_to_cpu(values[0]); + dice->rx_midi_ports[mode] = be32_to_cpu(values[1]); + + return 0; +} + static int dice_read_params(struct dice *dice) { __be32 pointers[6]; __be32 value; - int err; + int mode, err;
err = snd_fw_transaction(dice->unit, TCODE_READ_BLOCK_REQUEST, DICE_PRIVATE_SPACE, @@ -863,6 +944,12 @@ static int dice_read_params(struct dice *dice) CLOCK_CAP_SOURCE_INTERNAL; }
+ for (mode = 2; mode >= 0; --mode) { + err = dice_read_mode_params(dice, mode); + if (err < 0) + return err; + } + return 0; }
@@ -922,6 +1009,7 @@ static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *id) 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;