protocol.o \
operation.o
-gb-phy-y := gpb.o \
+gb-phy-y := gpb.o \
sdio.o \
uart.o \
pwm.o \
hid.o \
i2c.o \
spi.o \
- usb.o
+ usb.o \
+ audio.o \
+ audio-pcm.o \
+ audio-dai.o \
+ audio-gb-cmds.o
# Prefix all modules with gb-
gb-vibrator-y := vibrator.o
--- /dev/null
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/simple_card.h>
+#include "greybus.h"
+#include "gpbridge.h"
+#include "audio.h"
+
+/*
+ * This is the greybus cpu dai logic. It really doesn't do much
+ * other then provide the TRIGGER_START/STOP hooks that start
+ * and stop the timer sending audio data in the pcm logic.
+ */
+
+
+static int gb_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct gb_snd *snd_dev;
+
+
+ snd_dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ gb_pcm_hrtimer_start(snd_dev);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ gb_pcm_hrtimer_stop(snd_dev);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * XXX This is annoying, if we don't have a set_fmt function
+ * the subsystem returns -ENOTSUPP, which causes applications
+ * to fail, so add a dummy function here.
+ */
+static int gb_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ return 0;
+}
+
+static const struct snd_soc_dai_ops gb_dai_ops = {
+ .trigger = gb_dai_trigger,
+ .set_fmt = gb_dai_set_fmt,
+};
+
+struct snd_soc_dai_driver gb_cpu_dai = {
+ .name = "gb-cpu-dai",
+ .playback = {
+ .rates = GB_RATES,
+ .formats = GB_FMTS,
+ .channels_min = 1,
+ .channels_max = 2,
+ },
+ .ops = &gb_dai_ops,
+};
+
+static const struct snd_soc_component_driver gb_soc_component = {
+ .name = "gb-component",
+};
+
+static int gb_plat_probe(struct platform_device *pdev)
+{
+ struct gb_snd *snd_dev;
+ int ret;
+
+ snd_dev = (struct gb_snd *)pdev->dev.platform_data;
+ dev_set_drvdata(&pdev->dev, snd_dev);
+
+ ret = snd_soc_register_component(&pdev->dev, &gb_soc_component,
+ &gb_cpu_dai, 1);
+ return ret;
+}
+
+static int gb_plat_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_component(&pdev->dev);
+ snd_soc_unregister_platform(&pdev->dev);
+ return 0;
+}
+
+struct platform_driver gb_audio_plat_driver = {
+ .driver = {
+ .name = "gb-dai-audio",
+ },
+ .probe = gb_plat_probe,
+ .remove = gb_plat_remove,
+};
--- /dev/null
+#include <linux/kernel.h>
+#include "greybus.h"
+#include "gpbridge.h"
+#include "audio.h"
+
+#define GB_I2S_MGMT_VERSION_MAJOR 0x00
+#define GB_I2S_MGMT_VERSION_MINOR 0x01
+
+#define GB_I2S_DATA_VERSION_MAJOR 0x00
+#define GB_I2S_MGMT_VERSION_MINOR 0x01
+
+/***********************************
+ * GB I2S helper functions
+ ***********************************/
+int gb_i2s_mgmt_get_version(struct gb_connection *connection)
+{
+ struct gb_protocol_version_response response;
+
+ memset(&response, 0, sizeof(response));
+ return gb_protocol_get_version(connection,
+ GB_I2S_MGMT_TYPE_PROTOCOL_VERSION,
+ NULL, 0, &response,
+ GB_I2S_MGMT_VERSION_MAJOR);
+}
+
+int gb_i2s_data_get_version(struct gb_connection *connection)
+{
+ struct gb_protocol_version_response response;
+
+ memset(&response, 0, sizeof(response));
+ return gb_protocol_get_version(connection,
+ GB_I2S_DATA_TYPE_PROTOCOL_VERSION,
+ NULL, 0, &response,
+ GB_I2S_DATA_VERSION_MAJOR);
+}
+
+int gb_i2s_mgmt_activate_cport(struct gb_connection *connection,
+ uint16_t cport)
+{
+ struct gb_i2s_mgmt_activate_cport_request request;
+
+ memset(&request, 0, sizeof(request));
+ request.cport = cport;
+
+ return gb_operation_sync(connection, GB_I2S_MGMT_TYPE_ACTIVATE_CPORT,
+ &request, sizeof(request), NULL, 0);
+}
+
+int gb_i2s_mgmt_deactivate_cport(struct gb_connection *connection,
+ uint16_t cport)
+{
+ struct gb_i2s_mgmt_deactivate_cport_request request;
+
+ memset(&request, 0, sizeof(request));
+ request.cport = cport;
+
+ return gb_operation_sync(connection, GB_I2S_MGMT_TYPE_DEACTIVATE_CPORT,
+ &request, sizeof(request), NULL, 0);
+}
+
+int gb_i2s_mgmt_get_supported_configurations(
+ struct gb_connection *connection,
+ struct gb_i2s_mgmt_get_supported_configurations_response *get_cfg,
+ size_t size)
+{
+ return gb_operation_sync(connection,
+ GB_I2S_MGMT_TYPE_GET_SUPPORTED_CONFIGURATIONS,
+ NULL, 0, get_cfg, size);
+}
+
+int gb_i2s_mgmt_set_configuration(struct gb_connection *connection,
+ struct gb_i2s_mgmt_set_configuration_request *set_cfg)
+{
+ return gb_operation_sync(connection, GB_I2S_MGMT_TYPE_SET_CONFIGURATION,
+ set_cfg, sizeof(*set_cfg), NULL, 0);
+}
+
+int gb_i2s_mgmt_set_samples_per_message(
+ struct gb_connection *connection,
+ uint16_t samples_per_message)
+{
+ struct gb_i2s_mgmt_set_samples_per_message_request request;
+
+ memset(&request, 0, sizeof(request));
+ request.samples_per_message = samples_per_message;
+
+ return gb_operation_sync(connection,
+ GB_I2S_MGMT_TYPE_SET_SAMPLES_PER_MESSAGE,
+ &request, sizeof(request), NULL, 0);
+}
+
+/*
+ * XXX This is sort of a generic "setup" function which probably needs
+ * to be broken up, and tied into the constraints.
+ *
+ * I'm on the fence if we should just dictate that we only support
+ * 48k, 16bit, 2 channel, and avoid doign the whole probe for configurations
+ * and then picking one.
+ */
+int gb_i2s_mgmt_setup(struct gb_connection *connection)
+{
+ struct gb_i2s_mgmt_get_supported_configurations_response *get_cfg;
+ struct gb_i2s_mgmt_set_configuration_request set_cfg;
+ struct gb_i2s_mgmt_configuration *cfg;
+ size_t size;
+ int i, ret;
+
+ size = sizeof(*get_cfg) +
+ (CONFIG_COUNT_MAX * sizeof(get_cfg->config[0]));
+
+ get_cfg = kzalloc(size, GFP_KERNEL);
+ if (!get_cfg)
+ return -ENOMEM;
+
+ ret = gb_i2s_mgmt_get_supported_configurations(connection, get_cfg,
+ size);
+ if (ret) {
+ pr_err("get_supported_config failed: %d\n", ret);
+ goto free_get_cfg;
+ }
+
+ /* Pick 48KHz 16-bits/channel */
+ for (i = 0, cfg = get_cfg->config; i < CONFIG_COUNT_MAX; i++, cfg++) {
+ if ((cfg->sample_frequency == GB_SAMPLE_RATE) &&
+ (cfg->num_channels == 2) &&
+ (cfg->bytes_per_channel == 2) &&
+ (cfg->byte_order & GB_I2S_MGMT_BYTE_ORDER_LE) &&
+ (cfg->spatial_locations ==
+ (GB_I2S_MGMT_SPATIAL_LOCATION_FL |
+ GB_I2S_MGMT_SPATIAL_LOCATION_FR)) &&
+ (cfg->ll_protocol & GB_I2S_MGMT_PROTOCOL_I2S) &&
+ (cfg->ll_mclk_role & GB_I2S_MGMT_ROLE_MASTER) &&
+ (cfg->ll_bclk_role & GB_I2S_MGMT_ROLE_MASTER) &&
+ (cfg->ll_wclk_role & GB_I2S_MGMT_ROLE_MASTER) &&
+ (cfg->ll_wclk_polarity & GB_I2S_MGMT_POLARITY_NORMAL) &&
+ (cfg->ll_wclk_change_edge & GB_I2S_MGMT_EDGE_FALLING) &&
+ (cfg->ll_wclk_tx_edge & GB_I2S_MGMT_EDGE_FALLING) &&
+ (cfg->ll_wclk_rx_edge & GB_I2S_MGMT_EDGE_RISING) &&
+ (cfg->ll_data_offset == 1))
+ break;
+ }
+
+ if (i >= CONFIG_COUNT_MAX) {
+ pr_err("No valid configuration\n");
+ ret = -EINVAL;
+ goto free_get_cfg;
+ }
+
+ memcpy(&set_cfg, cfg, sizeof(set_cfg));
+ set_cfg.config.byte_order = GB_I2S_MGMT_BYTE_ORDER_LE;
+ set_cfg.config.ll_protocol = GB_I2S_MGMT_PROTOCOL_I2S;
+ set_cfg.config.ll_mclk_role = GB_I2S_MGMT_ROLE_MASTER;
+ set_cfg.config.ll_bclk_role = GB_I2S_MGMT_ROLE_MASTER;
+ set_cfg.config.ll_wclk_role = GB_I2S_MGMT_ROLE_MASTER;
+ set_cfg.config.ll_wclk_polarity = GB_I2S_MGMT_POLARITY_NORMAL;
+ set_cfg.config.ll_wclk_change_edge = GB_I2S_MGMT_EDGE_RISING;
+ set_cfg.config.ll_wclk_tx_edge = GB_I2S_MGMT_EDGE_FALLING;
+ set_cfg.config.ll_wclk_rx_edge = GB_I2S_MGMT_EDGE_RISING;
+
+ ret = gb_i2s_mgmt_set_configuration(connection, &set_cfg);
+ if (ret) {
+ pr_err("set_configuration failed: %d\n", ret);
+ goto free_get_cfg;
+ }
+
+ ret = gb_i2s_mgmt_set_samples_per_message(connection,
+ CONFIG_SAMPLES_PER_MSG);
+ if (ret) {
+ pr_err("set_samples_per_msg failed: %d\n", ret);
+ goto free_get_cfg;
+ }
+
+ /* XXX Add start delay here (probably 1ms) */
+ ret = gb_i2s_mgmt_activate_cport(connection,
+ CONFIG_I2S_REMOTE_DATA_CPORT);
+ if (ret) {
+ pr_err("activate_cport failed: %d\n", ret);
+ goto free_get_cfg;
+ }
+
+free_get_cfg:
+ kfree(get_cfg);
+ return ret;
+}
+
+int gb_i2s_send_data(struct gb_connection *connection,
+ void *req_buf, void *source_addr,
+ size_t len, int sample_num)
+{
+ struct gb_i2s_send_data_request *gb_req;
+ int ret;
+
+ gb_req = req_buf;
+ gb_req->sample_number = sample_num;
+
+ memcpy((void *)&gb_req->data[0], source_addr, len);
+
+ if (len < MAX_SEND_DATA_LEN)
+ for (; len < MAX_SEND_DATA_LEN; len++)
+ gb_req->data[len] = gb_req->data[len - SAMPLE_SIZE];
+
+ gb_req->size = len;
+
+ ret = gb_operation_sync(connection, GB_I2S_DATA_TYPE_SEND_DATA,
+ (void *) gb_req, SEND_DATA_BUF_LEN, NULL, 0);
+ return ret;
+}
--- /dev/null
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/simple_card.h>
+#include "greybus.h"
+#include "gpbridge.h"
+#include "audio.h"
+
+/*
+ * timer/workqueue logic for pushing pcm data.
+ *
+ * Since when we are playing audio, we don't get any
+ * status or feedback from the codec, we have to use a
+ * hrtimer to trigger sending data to the remote codec.
+ * However since the hrtimer runs in irq context, so we
+ * have to schedule a workqueue to actually send the
+ * greybus data.
+ */
+
+static void gb_pcm_work(struct work_struct *work)
+{
+ struct gb_snd *snd_dev = container_of(work, struct gb_snd, work);
+ struct snd_pcm_substream *substream = snd_dev->substream;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ unsigned int stride, frames, oldptr;
+ int period_elapsed;
+ char *address;
+ long len;
+
+ if (!snd_dev)
+ return;
+
+ if (!atomic_read(&snd_dev->running))
+ return;
+
+ address = runtime->dma_area + snd_dev->hwptr_done;
+
+ len = frames_to_bytes(runtime,
+ runtime->buffer_size) - snd_dev->hwptr_done;
+ len = min(len, MAX_SEND_DATA_LEN);
+ gb_i2s_send_data(snd_dev->i2s_tx_connection, snd_dev->send_data_req_buf,
+ address, len, snd_dev->send_data_sample_count);
+
+ snd_dev->send_data_sample_count += CONFIG_SAMPLES_PER_MSG;
+
+ stride = runtime->frame_bits >> 3;
+ frames = len/stride;
+
+ snd_pcm_stream_lock(substream);
+ oldptr = snd_dev->hwptr_done;
+ snd_dev->hwptr_done += len;
+ if (snd_dev->hwptr_done >= runtime->buffer_size * stride)
+ snd_dev->hwptr_done -= runtime->buffer_size * stride;
+
+ frames = (len + (oldptr % stride)) / stride;
+
+ snd_dev->transfer_done += frames;
+ if (snd_dev->transfer_done >= runtime->period_size) {
+ snd_dev->transfer_done -= runtime->period_size;
+ period_elapsed = 1;
+ }
+
+ snd_pcm_stream_unlock(substream);
+ if (period_elapsed)
+ snd_pcm_period_elapsed(snd_dev->substream);
+}
+
+static enum hrtimer_restart gb_pcm_timer_function(struct hrtimer *hrtimer)
+{
+ struct gb_snd *snd_dev = container_of(hrtimer, struct gb_snd, timer);
+
+ if (!atomic_read(&snd_dev->running))
+ return HRTIMER_NORESTART;
+ queue_work(snd_dev->workqueue, &snd_dev->work);
+ hrtimer_forward_now(hrtimer, ns_to_ktime(CONFIG_PERIOD_NS));
+ return HRTIMER_RESTART;
+}
+
+void gb_pcm_hrtimer_start(struct gb_snd *snd_dev)
+{
+ atomic_set(&snd_dev->running, 1);
+ hrtimer_start(&snd_dev->timer, ns_to_ktime(CONFIG_PERIOD_NS),
+ HRTIMER_MODE_REL);
+}
+
+void gb_pcm_hrtimer_stop(struct gb_snd *snd_dev)
+{
+ atomic_set(&snd_dev->running, 0);
+ hrtimer_cancel(&snd_dev->timer);
+}
+
+static int gb_pcm_hrtimer_init(struct gb_snd *snd_dev)
+{
+ hrtimer_init(&snd_dev->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ snd_dev->timer.function = gb_pcm_timer_function;
+ atomic_set(&snd_dev->running, 0);
+ snd_dev->workqueue = alloc_workqueue("gb-audio", WQ_HIGHPRI, 0);
+ if (!snd_dev->workqueue)
+ return -ENOMEM;
+ INIT_WORK(&snd_dev->work, gb_pcm_work);
+ return 0;
+}
+
+
+/*
+ * Core gb pcm structure
+ */
+static struct snd_pcm_hardware gb_plat_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID,
+ .formats = GB_FMTS,
+ .rates = GB_RATES,
+ .rate_min = 8000,
+ .rate_max = GB_SAMPLE_RATE,
+ .channels_min = 1,
+ .channels_max = 2,
+ /* XXX - All the values below are junk */
+ .buffer_bytes_max = 64 * 1024,
+ .period_bytes_min = 32,
+ .period_bytes_max = 8192,
+ .periods_min = 2,
+ .periods_max = 32,
+};
+
+static snd_pcm_uframes_t gb_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct gb_snd *snd_dev;
+
+ snd_dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+
+ return snd_dev->hwptr_done / (substream->runtime->frame_bits >> 3);
+}
+
+static int gb_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct gb_snd *snd_dev;
+
+ snd_dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+ snd_dev->hwptr_done = 0;
+ snd_dev->transfer_done = 0;
+ return 0;
+}
+
+static unsigned int rates[] = {GB_SAMPLE_RATE};
+static struct snd_pcm_hw_constraint_list constraints_rates = {
+ .count = ARRAY_SIZE(rates),
+ .list = rates,
+ .mask = 0,
+};
+
+static int gb_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct gb_snd *snd_dev;
+ unsigned long flags;
+ int ret;
+
+ snd_dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
+
+ spin_lock_irqsave(&snd_dev->lock, flags);
+ runtime->private_data = snd_dev;
+ snd_dev->substream = substream;
+ ret = gb_pcm_hrtimer_init(snd_dev);
+ spin_unlock_irqrestore(&snd_dev->lock, flags);
+
+ if (ret)
+ return ret;
+
+ snd_soc_set_runtime_hwparams(substream, &gb_plat_pcm_hardware);
+
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &constraints_rates);
+ if (ret < 0)
+ return ret;
+
+ return snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+}
+
+static int gb_pcm_close(struct snd_pcm_substream *substream)
+{
+ substream->runtime->private_data = NULL;
+ return 0;
+}
+
+static int gb_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ return snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+}
+
+static int gb_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static struct snd_pcm_ops gb_pcm_ops = {
+ .open = gb_pcm_open,
+ .close = gb_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = gb_pcm_hw_params,
+ .hw_free = gb_pcm_hw_free,
+ .prepare = gb_pcm_prepare,
+ .pointer = gb_pcm_pointer,
+};
+
+static void gb_pcm_free(struct snd_pcm *pcm)
+{
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+static int gb_pcm_new(struct snd_soc_pcm_runtime *rtd)
+{
+ struct snd_pcm *pcm = rtd->pcm;
+
+ return snd_pcm_lib_preallocate_pages_for_all(
+ pcm,
+ SNDRV_DMA_TYPE_CONTINUOUS,
+ snd_dma_continuous_data(GFP_KERNEL),
+ PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
+}
+
+struct snd_soc_platform_driver gb_soc_platform = {
+ .ops = &gb_pcm_ops,
+ .pcm_new = gb_pcm_new,
+ .pcm_free = gb_pcm_free,
+};
+
+static int gb_soc_platform_probe(struct platform_device *pdev)
+{
+ return snd_soc_register_platform(&pdev->dev, &gb_soc_platform);
+}
+
+static int gb_soc_platform_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_platform(&pdev->dev);
+ return 0;
+}
+
+struct platform_driver gb_audio_pcm_driver = {
+ .driver = {
+ .name = "gb-pcm-audio",
+ .owner = THIS_MODULE,
+ },
+ .probe = gb_soc_platform_probe,
+ .remove = gb_soc_platform_remove,
+};
--- /dev/null
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/i2c.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/simple_card.h>
+#include "greybus.h"
+#include "gpbridge.h"
+#include "audio.h"
+
+
+#define GB_AUDIO_DATA_DRIVER_NAME "gb_audio_data"
+#define GB_AUDIO_MGMT_DRIVER_NAME "gb_audio_mgmt"
+
+/*
+ * gb_snd management functions
+ */
+static DEFINE_SPINLOCK(gb_snd_list_lock);
+static LIST_HEAD(gb_snd_list);
+static int device_count;
+
+static struct gb_snd *gb_find_snd(int bundle_id)
+{
+ struct gb_snd *tmp, *ret = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&gb_snd_list_lock, flags);
+ list_for_each_entry(tmp, &gb_snd_list, list)
+ if (tmp->gb_bundle_id == bundle_id) {
+ ret = tmp;
+ break;
+ }
+ spin_unlock_irqrestore(&gb_snd_list_lock, flags);
+ return ret;
+}
+
+static struct gb_snd *gb_get_snd(int bundle_id)
+{
+ struct gb_snd *snd_dev;
+ unsigned long flags;
+
+ snd_dev = gb_find_snd(bundle_id);
+ if (snd_dev)
+ return snd_dev;
+
+ snd_dev = kzalloc(sizeof(*snd_dev), GFP_KERNEL);
+ if (!snd_dev)
+ return NULL;
+
+ spin_lock_init(&snd_dev->lock);
+ snd_dev->device_count = device_count++;
+ snd_dev->gb_bundle_id = bundle_id;
+ spin_lock_irqsave(&gb_snd_list_lock, flags);
+ list_add(&snd_dev->list, &gb_snd_list);
+ spin_unlock_irqrestore(&gb_snd_list_lock, flags);
+ return snd_dev;
+}
+
+static void gb_free_snd(struct gb_snd *snd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&gb_snd_list_lock, flags);
+ if (!snd->i2s_tx_connection &&
+ !snd->mgmt_connection) {
+ list_del(&snd->list);
+ spin_unlock_irqrestore(&gb_snd_list_lock, flags);
+ kfree(snd);
+ } else {
+ spin_unlock_irqrestore(&gb_snd_list_lock, flags);
+ }
+}
+
+
+
+
+/*
+ * This is the ASoC simple card binds the platform codec,
+ * cpu-dai and codec-dai togheter
+ */
+struct gb_card_info_object {
+ struct asoc_simple_card_info card_info;
+ char codec_name[255];
+ char platform_name[255];
+ char dai_name[255];
+};
+
+
+struct asoc_simple_card_info *setup_card_info(int device_count)
+{
+ struct gb_card_info_object *obj;
+
+ obj = kzalloc(sizeof(struct gb_card_info_object), GFP_KERNEL);
+ if (!obj)
+ return NULL;
+
+ obj->card_info.name = "Greybus Audio Module";
+ obj->card_info.card = "gb-card";
+ obj->card_info.codec = obj->codec_name;
+ obj->card_info.platform = obj->platform_name;
+ obj->card_info.cpu_dai.name = obj->dai_name;
+ obj->card_info.cpu_dai.fmt = GB_FMTS;
+#if USE_RT5645
+ obj->card_info.daifmt = GB_FMTS;
+ sprintf(obj->codec_name, "rt5645.%s", "6-001b"); /* XXX do i2c bus addr dynamically */
+ obj->card_info.codec_dai.name = "rt5645-aif1";
+ obj->card_info.codec_dai.fmt = SND_SOC_DAIFMT_CBM_CFM;
+ obj->card_info.codec_dai.sysclk = 12288000;
+#else
+ sprintf(obj->codec_name, "spdif-dit");
+ obj->card_info.codec_dai.name = "dit-hifi";
+#endif
+ sprintf(obj->platform_name, "gb-pcm-audio.%i", device_count);
+ sprintf(obj->dai_name, "gb-dai-audio.%i", device_count);
+
+ return &obj->card_info;
+}
+
+void free_card_info(struct asoc_simple_card_info *ci)
+{
+ struct gb_card_info_object *obj;
+
+ obj = container_of(ci, struct gb_card_info_object, card_info);
+ kfree(obj);
+}
+
+
+/*
+ * XXX this is sort of cruddy but I get warnings if
+ * we don't have dev.release handler set.
+ */
+static void default_release(struct device *dev)
+{
+}
+
+/*
+ * GB connection hooks
+ */
+static int gb_i2s_transmitter_connection_init(struct gb_connection *connection)
+{
+ struct gb_snd *snd_dev;
+ struct platform_device *codec, *dai;
+ struct asoc_simple_card_info *simple_card;
+ unsigned long flags;
+ int ret;
+
+ snd_dev = gb_get_snd(connection->bundle->id);
+ if (!snd_dev)
+ return -ENOMEM;
+
+ codec = platform_device_register_simple("spdif-dit", -1, NULL, 0);
+ if (!codec) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ dai = platform_device_register_simple("gb-pcm-audio", snd_dev->device_count, NULL, 0);
+ if (!dai) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ simple_card = setup_card_info(snd_dev->device_count);
+ if (!simple_card) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ spin_lock_irqsave(&snd_dev->lock, flags);
+ snd_dev->card.name = "asoc-simple-card";
+ snd_dev->card.id = snd_dev->device_count;
+ snd_dev->card.dev.release = default_release; /* XXX - suspicious */
+
+ snd_dev->cpu_dai.name = "gb-dai-audio";
+ snd_dev->cpu_dai.id = snd_dev->device_count;
+ snd_dev->cpu_dai.dev.release = default_release; /* XXX - suspicious */
+
+
+ snd_dev->simple_card_info = simple_card;
+ snd_dev->card.dev.platform_data = simple_card;
+
+ snd_dev->codec = codec;
+ snd_dev->i2s_tx_connection = connection;
+ snd_dev->cpu_dai.dev.platform_data = snd_dev;
+ snd_dev->i2s_tx_connection->private = snd_dev;
+ spin_unlock_irqrestore(&snd_dev->lock, flags);
+
+ ret = platform_device_register(&snd_dev->cpu_dai);
+ if (ret) {
+ pr_err("cpu_dai platform_device register failed\n");
+ goto out_dai;
+ }
+
+ ret = platform_device_register(&snd_dev->card);
+ if (ret) {
+ pr_err("card platform_device register failed\n");
+ goto out_card;
+ }
+
+ ret = gb_i2s_data_get_version(connection);
+ if (ret) {
+ pr_err("i2s data get_version() failed: %d\n", ret);
+ goto out_get_ver;
+ }
+
+ return 0;
+
+out_get_ver:
+ platform_device_unregister(&snd_dev->card);
+out_card:
+ platform_device_unregister(&snd_dev->cpu_dai);
+out_dai:
+ platform_device_unregister(codec);
+out:
+ gb_free_snd(snd_dev);
+ return ret;
+}
+
+static void gb_i2s_transmitter_connection_exit(struct gb_connection *connection)
+{
+ struct gb_snd *snd_dev;
+
+ snd_dev = (struct gb_snd *)connection->private;
+
+ platform_device_unregister(&snd_dev->card);
+ platform_device_unregister(&snd_dev->cpu_dai);
+ platform_device_unregister(snd_dev->codec);
+
+ free_card_info(snd_dev->simple_card_info);
+ snd_dev->i2s_tx_connection = NULL;
+ gb_free_snd(snd_dev);
+}
+
+static int gb_i2s_mgmt_connection_init(struct gb_connection *connection)
+{
+ struct gb_snd *snd_dev;
+ unsigned long flags;
+ int ret;
+
+ snd_dev = gb_get_snd(connection->bundle->id);
+ if (!snd_dev)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&snd_dev->lock, flags);
+ snd_dev->mgmt_connection = connection;
+ connection->private = snd_dev;
+ spin_unlock_irqrestore(&snd_dev->lock, flags);
+
+ ret = gb_i2s_mgmt_get_version(connection);
+ if (ret) {
+ pr_err("i2s mgmt get_version() failed: %d\n", ret);
+ goto err_free_snd_dev;
+ }
+
+ gb_i2s_mgmt_setup(connection);
+
+ snd_dev->send_data_req_buf = kzalloc(SEND_DATA_BUF_LEN, GFP_KERNEL);
+
+ if (!snd_dev->send_data_req_buf) {
+ ret = -ENOMEM;
+ goto err_deactivate_cport;
+ }
+
+ return 0;
+
+err_deactivate_cport:
+ gb_i2s_mgmt_deactivate_cport(connection, CONFIG_I2S_REMOTE_DATA_CPORT);
+err_free_snd_dev:
+ gb_free_snd(snd_dev);
+ return ret;
+}
+
+static void gb_i2s_mgmt_connection_exit(struct gb_connection *connection)
+{
+ struct gb_snd *snd_dev = (struct gb_snd *)connection->private;
+ int ret;
+
+ ret = gb_i2s_mgmt_deactivate_cport(connection,
+ CONFIG_I2S_REMOTE_DATA_CPORT);
+ if (ret)
+ pr_err("deactivate_cport failed: %d\n", ret);
+
+ kfree(snd_dev->send_data_req_buf);
+ snd_dev->send_data_req_buf = NULL;
+
+ snd_dev->mgmt_connection = NULL;
+ gb_free_snd(snd_dev);
+}
+
+static int gb_i2s_mgmt_report_event_recv(u8 type, struct gb_operation *op)
+{
+ struct gb_connection *connection = op->connection;
+ struct gb_i2s_mgmt_report_event_request *req = op->request->payload;
+ char *event_name;
+
+ if (type != GB_I2S_MGMT_TYPE_REPORT_EVENT) {
+ dev_err(&connection->dev, "Invalid request type: %d\n",
+ type);
+ return -EINVAL;
+ }
+
+ if (op->request->payload_size < sizeof(*req)) {
+ dev_err(&connection->dev, "Short request received: %d, %d\n",
+ op->request->payload_size, sizeof(*req));
+ return -EINVAL;
+ }
+
+ switch (req->event) {
+ case GB_I2S_MGMT_EVENT_UNSPECIFIED:
+ event_name = "UNSPECIFIED";
+ break;
+ case GB_I2S_MGMT_EVENT_HALT:
+ /* XXX Should stop streaming now */
+ event_name = "HALT";
+ break;
+ case GB_I2S_MGMT_EVENT_INTERNAL_ERROR:
+ event_name = "INTERNAL_ERROR";
+ break;
+ case GB_I2S_MGMT_EVENT_PROTOCOL_ERROR:
+ event_name = "PROTOCOL_ERROR";
+ break;
+ case GB_I2S_MGMT_EVENT_FAILURE:
+ event_name = "FAILURE";
+ break;
+ case GB_I2S_MGMT_EVENT_OUT_OF_SEQUENCE:
+ event_name = "OUT_OF_SEQUENCE";
+ break;
+ case GB_I2S_MGMT_EVENT_UNDERRUN:
+ event_name = "UNDERRUN";
+ break;
+ case GB_I2S_MGMT_EVENT_OVERRUN:
+ event_name = "OVERRUN";
+ break;
+ case GB_I2S_MGMT_EVENT_CLOCKING:
+ event_name = "CLOCKING";
+ break;
+ case GB_I2S_MGMT_EVENT_DATA_LEN:
+ event_name = "DATA_LEN";
+ break;
+ default:
+ dev_warn(&connection->dev, "Unknown I2S Event received: %d\n",
+ req->event);
+ return -EINVAL;
+ }
+
+ dev_warn(&connection->dev, "I2S Event received: %d - '%s'\n",
+ req->event, event_name);
+
+ return 0;
+}
+
+static struct gb_protocol gb_i2s_receiver_protocol = {
+ .name = GB_AUDIO_DATA_DRIVER_NAME,
+ .id = GREYBUS_PROTOCOL_I2S_RECEIVER,
+ .major = 0,
+ .minor = 1,
+ .connection_init = gb_i2s_transmitter_connection_init,
+ .connection_exit = gb_i2s_transmitter_connection_exit,
+ .request_recv = NULL,
+};
+
+static struct gb_protocol gb_i2s_mgmt_protocol = {
+ .name = GB_AUDIO_MGMT_DRIVER_NAME,
+ .id = GREYBUS_PROTOCOL_I2S_MGMT,
+ .major = 0,
+ .minor = 1,
+ .connection_init = gb_i2s_mgmt_connection_init,
+ .connection_exit = gb_i2s_mgmt_connection_exit,
+ .request_recv = gb_i2s_mgmt_report_event_recv,
+};
+
+
+/*
+ * This is the basic hook get things initialized and registered w/ gb
+ */
+
+int gb_audio_protocol_init(void)
+{
+ int err;
+
+ err = gb_protocol_register(&gb_i2s_mgmt_protocol);
+ if (err) {
+ pr_err("Can't register i2s mgmt protocol driver: %d\n", -err);
+ return err;
+ }
+
+ err = gb_protocol_register(&gb_i2s_receiver_protocol);
+ if (err) {
+ pr_err("Can't register Audio protocol driver: %d\n", -err);
+ goto err_unregister_i2s_mgmt;
+ }
+
+ err = platform_driver_register(&gb_audio_plat_driver);
+ if (err) {
+ pr_err("Can't register platform driver: %d\n", -err);
+ goto err_unregister_plat;
+ }
+
+ err = platform_driver_register(&gb_audio_pcm_driver);
+ if (err) {
+ pr_err("Can't register pcm driver: %d\n", -err);
+ goto err_unregister_pcm;
+ }
+
+ return 0;
+
+err_unregister_pcm:
+ platform_driver_unregister(&gb_audio_plat_driver);
+err_unregister_plat:
+ gb_protocol_deregister(&gb_i2s_receiver_protocol);
+err_unregister_i2s_mgmt:
+ gb_protocol_deregister(&gb_i2s_mgmt_protocol);
+ return err;
+}
+
+void gb_audio_protocol_exit(void)
+{
+ platform_driver_unregister(&gb_audio_pcm_driver);
+ platform_driver_unregister(&gb_audio_plat_driver);
+ gb_protocol_deregister(&gb_i2s_receiver_protocol);
+ gb_protocol_deregister(&gb_i2s_mgmt_protocol);
+}
+
+
+MODULE_LICENSE("GPL");
--- /dev/null
+#ifndef __GB_AUDIO_H
+#define __GB_AUDIO_H
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <sound/soc.h>
+#include "greybus.h"
+#include "gpbridge.h"
+
+
+#define GB_SAMPLE_RATE 48000
+#define GB_RATES SNDRV_PCM_RATE_48000
+#define GB_FMTS SNDRV_PCM_FMTBIT_S16_LE
+#define PREALLOC_BUFFER (32 * 1024)
+#define PREALLOC_BUFFER_MAX (32 * 1024)
+
+/* assuming 1 ms samples @ 48KHz */
+#define CONFIG_SAMPLES_PER_MSG 48L
+#define CONFIG_PERIOD_NS 1000000 /* send msg every 1ms */
+
+#define CONFIG_COUNT_MAX 32
+#define CONFIG_I2S_REMOTE_DATA_CPORT 7 /* XXX shouldn't be hardcoded...*/
+#define RT5647_SLAVE_ADDR 0x1b /* from toshiba/quanta code */
+
+/* Switch between dummy spdif and jetson rt5645 codec */
+#define USE_RT5645 0
+
+#define SAMPLE_SIZE 4
+#define MAX_SEND_DATA_LEN (CONFIG_SAMPLES_PER_MSG * SAMPLE_SIZE)
+#define SEND_DATA_BUF_LEN (sizeof(struct gb_i2s_send_data_request) + \
+ MAX_SEND_DATA_LEN)
+
+
+/*
+ * This is the gb_snd structure which ties everything together
+ * and fakes DMA interrupts via a timer.
+ */
+struct gb_snd {
+ struct platform_device card;
+ struct platform_device cpu_dai;
+ struct platform_device *codec;
+ struct asoc_simple_card_info *simple_card_info;
+ struct gb_connection *mgmt_connection;
+ struct gb_connection *i2s_tx_connection;
+ struct gb_connection *i2s_rx_connection;
+ char *send_data_req_buf;
+ long send_data_sample_count;
+ int gb_bundle_id;
+ int device_count;
+ struct snd_pcm_substream *substream;
+ struct hrtimer timer;
+ atomic_t running;
+ struct workqueue_struct *workqueue;
+ struct work_struct work;
+ int hwptr_done;
+ int transfer_done;
+ struct list_head list;
+ spinlock_t lock;
+};
+
+
+/*
+ * GB I2S cmd functions
+ */
+int gb_i2s_mgmt_get_version(struct gb_connection *connection);
+int gb_i2s_data_get_version(struct gb_connection *connection);
+int gb_i2s_mgmt_activate_cport(struct gb_connection *connection,
+ uint16_t cport);
+int gb_i2s_mgmt_deactivate_cport(struct gb_connection *connection,
+ uint16_t cport);
+int gb_i2s_mgmt_get_supported_configurations(
+ struct gb_connection *connection,
+ struct gb_i2s_mgmt_get_supported_configurations_response *get_cfg,
+ size_t size);
+int gb_i2s_mgmt_set_configuration(struct gb_connection *connection,
+ struct gb_i2s_mgmt_set_configuration_request *set_cfg);
+int gb_i2s_mgmt_set_samples_per_message(struct gb_connection *connection,
+ uint16_t samples_per_message);
+int gb_i2s_mgmt_setup(struct gb_connection *connection);
+int gb_i2s_send_data(struct gb_connection *connection, void *req_buf,
+ void *source_addr, size_t len, int sample_num);
+
+
+/*
+ * GB PCM hooks
+ */
+void gb_pcm_hrtimer_start(struct gb_snd *snd_dev);
+void gb_pcm_hrtimer_stop(struct gb_snd *snd_dev);
+
+
+/*
+ * Platform drivers
+ */
+extern struct platform_driver gb_audio_pcm_driver;
+extern struct platform_driver gb_audio_plat_driver;
+
+
+#endif /* __GB_AUDIO_H */
pr_err("error initializing hid protocol\n");
goto error_hid;
}
+ if (gb_audio_protocol_init()) {
+ pr_err("error initializing audio protocols\n");
+ goto error_audio;
+ }
+
return 0;
+error_audio:
+ gb_hid_protocol_exit();
error_hid:
gb_spi_protocol_exit();
error_spi:
static void __exit gpbridge_exit(void)
{
+ gb_audio_protocol_exit();
gb_hid_protocol_exit();
gb_spi_protocol_exit();
gb_i2c_protocol_exit();
__u8 pad;
__le32 spatial_locations;
__le32 ll_protocol;
+ __u8 ll_mclk_role;
__u8 ll_bclk_role;
__u8 ll_wclk_role;
__u8 ll_wclk_polarity;
__u8 ll_wclk_tx_edge;
__u8 ll_wclk_rx_edge;
__u8 ll_data_offset;
- __u8 ll_pad;
};
/* get supported configurations request has no payload */
extern int gb_hid_protocol_init(void);
extern void gb_hid_protocol_exit(void);
+extern int gb_audio_protocol_init(void);
+extern void gb_audio_protocol_exit(void);
+
#define gb_protocol_driver(__protocol) \
static int __init protocol_init(void) \
{ \
projects / users / jedix / linux-maple.git / commitdiff