1 files changed, 391 insertions, 0 deletions
diff --git a/sound/soc/blackfin/bf5xx-i2s.c b/sound/soc/blackfin/bf5xx-i2s.c
new file mode 100644
index 000000000..b69aeef64
--- /dev/null
+++ b/sound/soc/blackfin/bf5xx-i2s.c
@@ -0,0 +1,391 @@
+/*
+ * File:         sound/soc/blackfin/bf5xx-i2s.c
+ * Author:       Cliff Cai <Cliff.Cai@analog.com>
+ *
+ * Created:      Tue June 06 2008
+ * Description:  Blackfin I2S CPU DAI driver
+ *
+ * Modified:
+ *               Copyright 2008 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include <asm/irq.h>
+#include <asm/portmux.h>
+#include <linux/mutex.h>
+#include <linux/gpio.h>
+
+#include "bf5xx-sport.h"
+#include "bf5xx-i2s-pcm.h"
+
+struct bf5xx_i2s_port {
+	u16 tcr1;
+	u16 rcr1;
+	u16 tcr2;
+	u16 rcr2;
+	int configured;
+
+	unsigned int slots;
+	unsigned int tx_mask;
+	unsigned int rx_mask;
+
+	struct bf5xx_i2s_pcm_data tx_dma_data;
+	struct bf5xx_i2s_pcm_data rx_dma_data;
+};
+
+static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+		unsigned int fmt)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+	int ret = 0;
+
+	/* interface format:support I2S,slave mode */
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		bf5xx_i2s->tcr1 |= TFSR | TCKFE;
+		bf5xx_i2s->rcr1 |= RFSR | RCKFE;
+		bf5xx_i2s->tcr2 |= TSFSE;
+		bf5xx_i2s->rcr2 |= RSFSE;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		bf5xx_i2s->tcr1 |= TFSR;
+		bf5xx_i2s->rcr1 |= RFSR;
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		ret = -EINVAL;
+		break;
+	default:
+		dev_err(cpu_dai->dev, "%s: Unknown DAI format type\n",
+			__func__);
+		ret = -EINVAL;
+		break;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+	case SND_SOC_DAIFMT_CBM_CFS:
+	case SND_SOC_DAIFMT_CBS_CFM:
+		ret = -EINVAL;
+		break;
+	default:
+		dev_err(cpu_dai->dev, "%s: Unknown DAI master type\n",
+			__func__);
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params,
+				struct snd_soc_dai *dai)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+	int ret = 0;
+
+	bf5xx_i2s->tcr2 &= ~0x1f;
+	bf5xx_i2s->rcr2 &= ~0x1f;
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S8:
+		bf5xx_i2s->tcr2 |= 7;
+		bf5xx_i2s->rcr2 |= 7;
+		sport_handle->wdsize = 1;
+		break;
+	case SNDRV_PCM_FORMAT_S16_LE:
+		bf5xx_i2s->tcr2 |= 15;
+		bf5xx_i2s->rcr2 |= 15;
+		sport_handle->wdsize = 2;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		bf5xx_i2s->tcr2 |= 23;
+		bf5xx_i2s->rcr2 |= 23;
+		sport_handle->wdsize = 3;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		bf5xx_i2s->tcr2 |= 31;
+		bf5xx_i2s->rcr2 |= 31;
+		sport_handle->wdsize = 4;
+		break;
+	}
+
+	if (!bf5xx_i2s->configured) {
+		/*
+		 * TX and RX are not independent,they are enabled at the
+		 * same time, even if only one side is running. So, we
+		 * need to configure both of them at the time when the first
+		 * stream is opened.
+		 *
+		 * CPU DAI:slave mode.
+		 */
+		bf5xx_i2s->configured = 1;
+		ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
+				      bf5xx_i2s->rcr2, 0, 0);
+		if (ret) {
+			dev_err(dai->dev, "SPORT is busy!\n");
+			return -EBUSY;
+		}
+
+		ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
+				      bf5xx_i2s->tcr2, 0, 0);
+		if (ret) {
+			dev_err(dai->dev, "SPORT is busy!\n");
+			return -EBUSY;
+		}
+	}
+
+	return 0;
+}
+
+static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
+			       struct snd_soc_dai *dai)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+
+	dev_dbg(dai->dev, "%s enter\n", __func__);
+	/* No active stream, SPORT is allowed to be configured again. */
+	if (!dai->active)
+		bf5xx_i2s->configured = 0;
+}
+
+static int bf5xx_i2s_set_channel_map(struct snd_soc_dai *dai,
+		unsigned int tx_num, unsigned int *tx_slot,
+		unsigned int rx_num, unsigned int *rx_slot)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+	unsigned int tx_mapped = 0, rx_mapped = 0;
+	unsigned int slot;
+	int i;
+
+	if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
+			(rx_num > BFIN_TDM_DAI_MAX_SLOTS))
+		return -EINVAL;
+
+	for (i = 0; i < tx_num; i++) {
+		slot = tx_slot[i];
+		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
+				(!(tx_mapped & (1 << slot)))) {
+			bf5xx_i2s->tx_dma_data.map[i] = slot;
+			tx_mapped |= 1 << slot;
+		} else
+			return -EINVAL;
+	}
+	for (i = 0; i < rx_num; i++) {
+		slot = rx_slot[i];
+		if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
+				(!(rx_mapped & (1 << slot)))) {
+			bf5xx_i2s->rx_dma_data.map[i] = slot;
+			rx_mapped |= 1 << slot;
+		} else
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int bf5xx_i2s_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+	unsigned int rx_mask, int slots, int width)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+
+	if (slots % 8 != 0 || slots > 8)
+		return -EINVAL;
+
+	if (width != 32)
+		return -EINVAL;
+
+	bf5xx_i2s->slots = slots;
+	bf5xx_i2s->tx_mask = tx_mask;
+	bf5xx_i2s->rx_mask = rx_mask;
+
+	bf5xx_i2s->tx_dma_data.tdm_mode = slots != 0;
+	bf5xx_i2s->rx_dma_data.tdm_mode = slots != 0;
+
+	return sport_set_multichannel(sport_handle, slots, tx_mask, rx_mask, 0);
+}
+
+#ifdef CONFIG_PM
+static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+
+	dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
+
+	if (dai->capture_active)
+		sport_rx_stop(sport_handle);
+	if (dai->playback_active)
+		sport_tx_stop(sport_handle);
+	return 0;
+}
+
+static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+	int ret;
+
+	dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
+
+	ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
+				      bf5xx_i2s->rcr2, 0, 0);
+	if (ret) {
+		dev_err(dai->dev, "SPORT is busy!\n");
+		return -EBUSY;
+	}
+
+	ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
+				      bf5xx_i2s->tcr2, 0, 0);
+	if (ret) {
+		dev_err(dai->dev, "SPORT is busy!\n");
+		return -EBUSY;
+	}
+
+	return sport_set_multichannel(sport_handle, bf5xx_i2s->slots,
+			bf5xx_i2s->tx_mask, bf5xx_i2s->rx_mask, 0);
+}
+
+#else
+#define bf5xx_i2s_suspend	NULL
+#define bf5xx_i2s_resume	NULL
+#endif
+
+static int bf5xx_i2s_dai_probe(struct snd_soc_dai *dai)
+{
+	struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
+	struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
+	unsigned int i;
+
+	for (i = 0; i < BFIN_TDM_DAI_MAX_SLOTS; i++) {
+		bf5xx_i2s->tx_dma_data.map[i] = i;
+		bf5xx_i2s->rx_dma_data.map[i] = i;
+	}
+
+	dai->playback_dma_data = &bf5xx_i2s->tx_dma_data;
+	dai->capture_dma_data = &bf5xx_i2s->rx_dma_data;
+
+	return 0;
+}
+
+#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
+		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
+		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
+		SNDRV_PCM_RATE_96000)
+
+#define BF5XX_I2S_FORMATS \
+	(SNDRV_PCM_FMTBIT_S8 | \
+	 SNDRV_PCM_FMTBIT_S16_LE | \
+	 SNDRV_PCM_FMTBIT_S24_LE | \
+	 SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
+	.shutdown	 = bf5xx_i2s_shutdown,
+	.hw_params	 = bf5xx_i2s_hw_params,
+	.set_fmt	 = bf5xx_i2s_set_dai_fmt,
+	.set_tdm_slot	 = bf5xx_i2s_set_tdm_slot,
+	.set_channel_map = bf5xx_i2s_set_channel_map,
+};
+
+static struct snd_soc_dai_driver bf5xx_i2s_dai = {
+	.probe = bf5xx_i2s_dai_probe,
+	.suspend = bf5xx_i2s_suspend,
+	.resume = bf5xx_i2s_resume,
+	.playback = {
+		.channels_min = 2,
+		.channels_max = 8,
+		.rates = BF5XX_I2S_RATES,
+		.formats = BF5XX_I2S_FORMATS,},
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 8,
+		.rates = BF5XX_I2S_RATES,
+		.formats = BF5XX_I2S_FORMATS,},
+	.ops = &bf5xx_i2s_dai_ops,
+};
+
+static const struct snd_soc_component_driver bf5xx_i2s_component = {
+	.name		= "bf5xx-i2s",
+};
+
+static int bf5xx_i2s_probe(struct platform_device *pdev)
+{
+	struct sport_device *sport_handle;
+	int ret;
+
+	/* configure SPORT for I2S */
+	sport_handle = sport_init(pdev, 4, 8 * sizeof(u32),
+		sizeof(struct bf5xx_i2s_port));
+	if (!sport_handle)
+		return -ENODEV;
+
+	/* register with the ASoC layers */
+	ret = snd_soc_register_component(&pdev->dev, &bf5xx_i2s_component,
+					 &bf5xx_i2s_dai, 1);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
+		sport_done(sport_handle);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int bf5xx_i2s_remove(struct platform_device *pdev)
+{
+	struct sport_device *sport_handle = platform_get_drvdata(pdev);
+
+	dev_dbg(&pdev->dev, "%s enter\n", __func__);
+
+	snd_soc_unregister_component(&pdev->dev);
+	sport_done(sport_handle);
+
+	return 0;
+}
+
+static struct platform_driver bfin_i2s_driver = {
+	.probe  = bf5xx_i2s_probe,
+	.remove = bf5xx_i2s_remove,
+	.driver = {
+		.name = "bfin-i2s",
+	},
+};
+
+module_platform_driver(bfin_i2s_driver);
+
+/* Module information */
+MODULE_AUTHOR("Cliff Cai");
+MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
+MODULE_LICENSE("GPL");
+