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-rw-r--r--sound/soc/sti/sti_uniperif.c507
1 files changed, 507 insertions, 0 deletions
diff --git a/sound/soc/sti/sti_uniperif.c b/sound/soc/sti/sti_uniperif.c
new file mode 100644
index 000000000..a4d74d1e3
--- /dev/null
+++ b/sound/soc/sti/sti_uniperif.c
@@ -0,0 +1,507 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
+ * for STMicroelectronics.
+ */
+
+#include <linux/module.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/delay.h>
+
+#include "uniperif.h"
+
+/*
+ * User frame size shall be 2, 4, 6 or 8 32-bits words length
+ * (i.e. 8, 16, 24 or 32 bytes)
+ * This constraint comes from allowed values for
+ * UNIPERIF_I2S_FMT_NUM_CH register
+ */
+#define UNIPERIF_MAX_FRAME_SZ 0x20
+#define UNIPERIF_ALLOWED_FRAME_SZ (0x08 | 0x10 | 0x18 | UNIPERIF_MAX_FRAME_SZ)
+
+struct sti_uniperiph_dev_data {
+ unsigned int id; /* Nb available player instances */
+ unsigned int version; /* player IP version */
+ unsigned int stream;
+ const char *dai_names;
+ enum uniperif_type type;
+};
+
+static const struct sti_uniperiph_dev_data sti_uniplayer_hdmi = {
+ .id = 0,
+ .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0,
+ .stream = SNDRV_PCM_STREAM_PLAYBACK,
+ .dai_names = "Uni Player #0 (HDMI)",
+ .type = SND_ST_UNIPERIF_TYPE_HDMI
+};
+
+static const struct sti_uniperiph_dev_data sti_uniplayer_pcm_out = {
+ .id = 1,
+ .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0,
+ .stream = SNDRV_PCM_STREAM_PLAYBACK,
+ .dai_names = "Uni Player #1 (PCM OUT)",
+ .type = SND_ST_UNIPERIF_TYPE_PCM | SND_ST_UNIPERIF_TYPE_TDM,
+};
+
+static const struct sti_uniperiph_dev_data sti_uniplayer_dac = {
+ .id = 2,
+ .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0,
+ .stream = SNDRV_PCM_STREAM_PLAYBACK,
+ .dai_names = "Uni Player #2 (DAC)",
+ .type = SND_ST_UNIPERIF_TYPE_PCM,
+};
+
+static const struct sti_uniperiph_dev_data sti_uniplayer_spdif = {
+ .id = 3,
+ .version = SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0,
+ .stream = SNDRV_PCM_STREAM_PLAYBACK,
+ .dai_names = "Uni Player #3 (SPDIF)",
+ .type = SND_ST_UNIPERIF_TYPE_SPDIF
+};
+
+static const struct sti_uniperiph_dev_data sti_unireader_pcm_in = {
+ .id = 0,
+ .version = SND_ST_UNIPERIF_VERSION_UNI_RDR_1_0,
+ .stream = SNDRV_PCM_STREAM_CAPTURE,
+ .dai_names = "Uni Reader #0 (PCM IN)",
+ .type = SND_ST_UNIPERIF_TYPE_PCM | SND_ST_UNIPERIF_TYPE_TDM,
+};
+
+static const struct sti_uniperiph_dev_data sti_unireader_hdmi_in = {
+ .id = 1,
+ .version = SND_ST_UNIPERIF_VERSION_UNI_RDR_1_0,
+ .stream = SNDRV_PCM_STREAM_CAPTURE,
+ .dai_names = "Uni Reader #1 (HDMI IN)",
+ .type = SND_ST_UNIPERIF_TYPE_PCM,
+};
+
+static const struct of_device_id snd_soc_sti_match[] = {
+ { .compatible = "st,stih407-uni-player-hdmi",
+ .data = &sti_uniplayer_hdmi
+ },
+ { .compatible = "st,stih407-uni-player-pcm-out",
+ .data = &sti_uniplayer_pcm_out
+ },
+ { .compatible = "st,stih407-uni-player-dac",
+ .data = &sti_uniplayer_dac
+ },
+ { .compatible = "st,stih407-uni-player-spdif",
+ .data = &sti_uniplayer_spdif
+ },
+ { .compatible = "st,stih407-uni-reader-pcm_in",
+ .data = &sti_unireader_pcm_in
+ },
+ { .compatible = "st,stih407-uni-reader-hdmi",
+ .data = &sti_unireader_hdmi_in
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, snd_soc_sti_match);
+
+int sti_uniperiph_reset(struct uniperif *uni)
+{
+ int count = 10;
+
+ /* Reset uniperipheral uni */
+ SET_UNIPERIF_SOFT_RST_SOFT_RST(uni);
+
+ if (uni->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
+ while (GET_UNIPERIF_SOFT_RST_SOFT_RST(uni) && count) {
+ udelay(5);
+ count--;
+ }
+ }
+
+ if (!count) {
+ dev_err(uni->dev, "Failed to reset uniperif\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int sti_uniperiph_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+ unsigned int rx_mask, int slots,
+ int slot_width)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *uni = priv->dai_data.uni;
+ int i, frame_size, avail_slots;
+
+ if (!UNIPERIF_TYPE_IS_TDM(uni)) {
+ dev_err(uni->dev, "cpu dai not in tdm mode\n");
+ return -EINVAL;
+ }
+
+ /* store info in unip context */
+ uni->tdm_slot.slots = slots;
+ uni->tdm_slot.slot_width = slot_width;
+ /* unip is unidirectionnal */
+ uni->tdm_slot.mask = (tx_mask != 0) ? tx_mask : rx_mask;
+
+ /* number of available timeslots */
+ for (i = 0, avail_slots = 0; i < uni->tdm_slot.slots; i++) {
+ if ((uni->tdm_slot.mask >> i) & 0x01)
+ avail_slots++;
+ }
+ uni->tdm_slot.avail_slots = avail_slots;
+
+ /* frame size in bytes */
+ frame_size = uni->tdm_slot.avail_slots * uni->tdm_slot.slot_width / 8;
+
+ /* check frame size is allowed */
+ if ((frame_size > UNIPERIF_MAX_FRAME_SZ) ||
+ (frame_size & ~(int)UNIPERIF_ALLOWED_FRAME_SZ)) {
+ dev_err(uni->dev, "frame size not allowed: %d bytes\n",
+ frame_size);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+int sti_uniperiph_fix_tdm_chan(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct uniperif *uni = rule->private;
+ struct snd_interval t;
+
+ t.min = uni->tdm_slot.avail_slots;
+ t.max = uni->tdm_slot.avail_slots;
+ t.openmin = 0;
+ t.openmax = 0;
+ t.integer = 0;
+
+ return snd_interval_refine(hw_param_interval(params, rule->var), &t);
+}
+
+int sti_uniperiph_fix_tdm_format(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct uniperif *uni = rule->private;
+ struct snd_mask *maskp = hw_param_mask(params, rule->var);
+ u64 format;
+
+ switch (uni->tdm_slot.slot_width) {
+ case 16:
+ format = SNDRV_PCM_FMTBIT_S16_LE;
+ break;
+ case 32:
+ format = SNDRV_PCM_FMTBIT_S32_LE;
+ break;
+ default:
+ dev_err(uni->dev, "format not supported: %d bits\n",
+ uni->tdm_slot.slot_width);
+ return -EINVAL;
+ }
+
+ maskp->bits[0] &= (u_int32_t)format;
+ maskp->bits[1] &= (u_int32_t)(format >> 32);
+ /* clear remaining indexes */
+ memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX - 64) / 8);
+
+ if (!maskp->bits[0] && !maskp->bits[1])
+ return -EINVAL;
+
+ return 0;
+}
+
+int sti_uniperiph_get_tdm_word_pos(struct uniperif *uni,
+ unsigned int *word_pos)
+{
+ int slot_width = uni->tdm_slot.slot_width / 8;
+ int slots_num = uni->tdm_slot.slots;
+ unsigned int slots_mask = uni->tdm_slot.mask;
+ int i, j, k;
+ unsigned int word16_pos[4];
+
+ /* word16_pos:
+ * word16_pos[0] = WORDX_LSB
+ * word16_pos[1] = WORDX_MSB,
+ * word16_pos[2] = WORDX+1_LSB
+ * word16_pos[3] = WORDX+1_MSB
+ */
+
+ /* set unip word position */
+ for (i = 0, j = 0, k = 0; (i < slots_num) && (k < WORD_MAX); i++) {
+ if ((slots_mask >> i) & 0x01) {
+ word16_pos[j] = i * slot_width;
+
+ if (slot_width == 4) {
+ word16_pos[j + 1] = word16_pos[j] + 2;
+ j++;
+ }
+ j++;
+
+ if (j > 3) {
+ word_pos[k] = word16_pos[1] |
+ (word16_pos[0] << 8) |
+ (word16_pos[3] << 16) |
+ (word16_pos[2] << 24);
+ j = 0;
+ k++;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * sti_uniperiph_dai_create_ctrl
+ * This function is used to create Ctrl associated to DAI but also pcm device.
+ * Request is done by front end to associate ctrl with pcm device id
+ */
+static int sti_uniperiph_dai_create_ctrl(struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *uni = priv->dai_data.uni;
+ struct snd_kcontrol_new *ctrl;
+ int i;
+
+ if (!uni->num_ctrls)
+ return 0;
+
+ for (i = 0; i < uni->num_ctrls; i++) {
+ /*
+ * Several Control can have same name. Controls are indexed on
+ * Uniperipheral instance ID
+ */
+ ctrl = &uni->snd_ctrls[i];
+ ctrl->index = uni->id;
+ ctrl->device = uni->id;
+ }
+
+ return snd_soc_add_dai_controls(dai, uni->snd_ctrls, uni->num_ctrls);
+}
+
+/*
+ * DAI
+ */
+int sti_uniperiph_dai_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct uniperif *uni = priv->dai_data.uni;
+ struct snd_dmaengine_dai_dma_data *dma_data;
+ int transfer_size;
+
+ if (uni->type == SND_ST_UNIPERIF_TYPE_TDM)
+ /* transfer size = user frame size (in 32-bits FIFO cell) */
+ transfer_size = snd_soc_params_to_frame_size(params) / 32;
+ else
+ transfer_size = params_channels(params) * UNIPERIF_FIFO_FRAMES;
+
+ dma_data = snd_soc_dai_get_dma_data(dai, substream);
+ dma_data->maxburst = transfer_size;
+
+ return 0;
+}
+
+int sti_uniperiph_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+
+ priv->dai_data.uni->daifmt = fmt;
+
+ return 0;
+}
+
+static int sti_uniperiph_suspend(struct snd_soc_component *component)
+{
+ struct sti_uniperiph_data *priv = snd_soc_component_get_drvdata(component);
+ struct uniperif *uni = priv->dai_data.uni;
+ int ret;
+
+ /* The uniperipheral should be in stopped state */
+ if (uni->state != UNIPERIF_STATE_STOPPED) {
+ dev_err(uni->dev, "%s: invalid uni state( %d)\n",
+ __func__, (int)uni->state);
+ return -EBUSY;
+ }
+
+ /* Pinctrl: switch pinstate to sleep */
+ ret = pinctrl_pm_select_sleep_state(uni->dev);
+ if (ret)
+ dev_err(uni->dev, "%s: failed to select pinctrl state\n",
+ __func__);
+
+ return ret;
+}
+
+static int sti_uniperiph_resume(struct snd_soc_component *component)
+{
+ struct sti_uniperiph_data *priv = snd_soc_component_get_drvdata(component);
+ struct uniperif *uni = priv->dai_data.uni;
+ int ret;
+
+ if (priv->dai_data.stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = uni_player_resume(uni);
+ if (ret)
+ return ret;
+ }
+
+ /* pinctrl: switch pinstate to default */
+ ret = pinctrl_pm_select_default_state(uni->dev);
+ if (ret)
+ dev_err(uni->dev, "%s: failed to select pinctrl state\n",
+ __func__);
+
+ return ret;
+}
+
+static int sti_uniperiph_dai_probe(struct snd_soc_dai *dai)
+{
+ struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
+ struct sti_uniperiph_dai *dai_data = &priv->dai_data;
+
+ /* DMA settings*/
+ if (priv->dai_data.stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_dai_init_dma_data(dai, &dai_data->dma_data, NULL);
+ else
+ snd_soc_dai_init_dma_data(dai, NULL, &dai_data->dma_data);
+
+ dai_data->dma_data.addr = dai_data->uni->fifo_phys_address;
+ dai_data->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+
+ return sti_uniperiph_dai_create_ctrl(dai);
+}
+
+static const struct snd_soc_dai_driver sti_uniperiph_dai_template = {
+ .probe = sti_uniperiph_dai_probe,
+};
+
+static const struct snd_soc_component_driver sti_uniperiph_dai_component = {
+ .name = "sti_cpu_dai",
+ .suspend = sti_uniperiph_suspend,
+ .resume = sti_uniperiph_resume,
+ .legacy_dai_naming = 1,
+};
+
+static int sti_uniperiph_cpu_dai_of(struct device_node *node,
+ struct sti_uniperiph_data *priv)
+{
+ struct device *dev = &priv->pdev->dev;
+ struct sti_uniperiph_dai *dai_data = &priv->dai_data;
+ struct snd_soc_dai_driver *dai = priv->dai;
+ struct snd_soc_pcm_stream *stream;
+ struct uniperif *uni;
+ const struct of_device_id *of_id;
+ const struct sti_uniperiph_dev_data *dev_data;
+ const char *mode;
+ int ret;
+
+ /* Populate data structure depending on compatibility */
+ of_id = of_match_node(snd_soc_sti_match, node);
+ if (!of_id->data) {
+ dev_err(dev, "data associated to device is missing\n");
+ return -EINVAL;
+ }
+ dev_data = (struct sti_uniperiph_dev_data *)of_id->data;
+
+ uni = devm_kzalloc(dev, sizeof(*uni), GFP_KERNEL);
+ if (!uni)
+ return -ENOMEM;
+
+ uni->id = dev_data->id;
+ uni->ver = dev_data->version;
+
+ *dai = sti_uniperiph_dai_template;
+ dai->name = dev_data->dai_names;
+
+ /* Get resources and base address */
+ uni->base = devm_platform_get_and_ioremap_resource(priv->pdev, 0, &uni->mem_region);
+ if (IS_ERR(uni->base))
+ return PTR_ERR(uni->base);
+
+ uni->fifo_phys_address = uni->mem_region->start +
+ UNIPERIF_FIFO_DATA_OFFSET(uni);
+
+ uni->irq = platform_get_irq(priv->pdev, 0);
+ if (uni->irq < 0)
+ return -ENXIO;
+
+ uni->type = dev_data->type;
+
+ /* check if player should be configured for tdm */
+ if (dev_data->type & SND_ST_UNIPERIF_TYPE_TDM) {
+ if (!of_property_read_string(node, "st,tdm-mode", &mode))
+ uni->type = SND_ST_UNIPERIF_TYPE_TDM;
+ else
+ uni->type = SND_ST_UNIPERIF_TYPE_PCM;
+ }
+
+ dai_data->uni = uni;
+ dai_data->stream = dev_data->stream;
+
+ if (priv->dai_data.stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = uni_player_init(priv->pdev, uni);
+ stream = &dai->playback;
+ } else {
+ ret = uni_reader_init(priv->pdev, uni);
+ stream = &dai->capture;
+ }
+ if (ret < 0)
+ return ret;
+
+ dai->ops = uni->dai_ops;
+
+ stream->stream_name = dai->name;
+ stream->channels_min = uni->hw->channels_min;
+ stream->channels_max = uni->hw->channels_max;
+ stream->rates = uni->hw->rates;
+ stream->formats = uni->hw->formats;
+
+ return 0;
+}
+
+static const struct snd_dmaengine_pcm_config dmaengine_pcm_config = {
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+static int sti_uniperiph_probe(struct platform_device *pdev)
+{
+ struct sti_uniperiph_data *priv;
+ struct device_node *node = pdev->dev.of_node;
+ int ret;
+
+ /* Allocate the private data and the CPU_DAI array */
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->dai = devm_kzalloc(&pdev->dev, sizeof(*priv->dai), GFP_KERNEL);
+ if (!priv->dai)
+ return -ENOMEM;
+
+ priv->pdev = pdev;
+
+ ret = sti_uniperiph_cpu_dai_of(node, priv);
+ if (ret < 0)
+ return ret;
+
+ dev_set_drvdata(&pdev->dev, priv);
+
+ ret = devm_snd_soc_register_component(&pdev->dev,
+ &sti_uniperiph_dai_component,
+ priv->dai, 1);
+ if (ret < 0)
+ return ret;
+
+ return devm_snd_dmaengine_pcm_register(&pdev->dev,
+ &dmaengine_pcm_config, 0);
+}
+
+static struct platform_driver sti_uniperiph_driver = {
+ .driver = {
+ .name = "sti-uniperiph-dai",
+ .of_match_table = snd_soc_sti_match,
+ },
+ .probe = sti_uniperiph_probe,
+};
+module_platform_driver(sti_uniperiph_driver);
+
+MODULE_DESCRIPTION("uniperipheral DAI driver");
+MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>");
+MODULE_LICENSE("GPL v2");