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Subject[PATCH 6/9] ASoC: Blackfin: I2S CPU DAI driver
Date
From: Cliff Cai <cliff.cai@analog.com>

Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
---
sound/soc/blackfin/bf5xx-i2s.c | 289 ++++++++++++++++++++++++++++++++++++++++
sound/soc/blackfin/bf5xx-i2s.h | 14 ++
2 files changed, 303 insertions(+), 0 deletions(-)
create mode 100644 sound/soc/blackfin/bf5xx-i2s.c
create mode 100644 sound/soc/blackfin/bf5xx-i2s.h
diff --git a/sound/soc/blackfin/bf5xx-i2s.c b/sound/soc/blackfin/bf5xx-i2s.c
new file mode 100644
index 0000000..10fc252
--- /dev/null
+++ b/sound/soc/blackfin/bf5xx-i2s.c
@@ -0,0 +1,289 @@
+/*
+ * 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.h"
+
+struct bf5xx_i2s_port {
+ u16 tcr1;
+ u16 rcr1;
+ u16 tcr2;
+ u16 rcr2;
+ int counter;
+};
+
+static struct bf5xx_i2s_port bf5xx_i2s;
+static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
+
+static struct sport_param sport_params[2] = {
+ {
+ .dma_rx_chan = CH_SPORT0_RX,
+ .dma_tx_chan = CH_SPORT0_TX,
+ .err_irq = IRQ_SPORT0_ERROR,
+ .regs = (struct sport_register *)SPORT0_TCR1,
+ },
+ {
+ .dma_rx_chan = CH_SPORT1_RX,
+ .dma_tx_chan = CH_SPORT1_TX,
+ .err_irq = IRQ_SPORT1_ERROR,
+ .regs = (struct sport_register *)SPORT1_TCR1,
+ }
+};
+
+static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+ unsigned int fmt)
+{
+ int ret = 0;
+
+ /* interface format:support I2S,slave mode */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ ret = -EINVAL;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ ret = -EINVAL;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ ret = -EINVAL;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ break;
+ case SND_SOC_DAIFMT_CBS_CFM:
+ ret = -EINVAL;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int bf5xx_i2s_startup(struct snd_pcm_substream *substream)
+{
+ pr_debug("%s enter\n", __func__);
+
+ /*this counter is used for counting how many pcm streams are opened*/
+ bf5xx_i2s.counter++;
+ return 0;
+}
+
+static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ int ret = 0;
+
+ bf5xx_i2s.tcr2 &= ~0x1f;
+ bf5xx_i2s.rcr2 &= ~0x1f;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ bf5xx_i2s.tcr2 |= 15;
+ bf5xx_i2s.rcr2 |= 15;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ bf5xx_i2s.tcr2 |= 23;
+ bf5xx_i2s.rcr2 |= 23;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ bf5xx_i2s.tcr2 |= 31;
+ bf5xx_i2s.rcr2 |= 31;
+ break;
+ }
+
+ if (bf5xx_i2s.counter == 1) {
+ /*
+ * 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 format:I2S, slave mode.
+ */
+ ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|bf5xx_i2s.rcr2, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|bf5xx_i2s.tcr2, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+ }
+
+ return 0;
+}
+
+static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream)
+{
+ pr_debug("%s enter\n", __func__);
+ bf5xx_i2s.counter--;
+}
+
+static int bf5xx_i2s_probe(struct platform_device *pdev,
+ struct snd_soc_dai *dai)
+{
+ u16 sport_req[][7] = {
+ { P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
+ P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0},
+ { P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS,
+ P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0},
+ };
+
+ pr_debug("%s enter\n", __func__);
+ if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
+ pr_err("Requesting Peripherals failed\n");
+ return -EFAULT;
+ }
+
+ /* request DMA for SPORT */
+ sport_handle = sport_init(&sport_params[sport_num], 4, \
+ 2 * sizeof(u32), NULL);
+ if (!sport_handle) {
+ peripheral_free_list(&sport_req[sport_num][0]);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int bf5xx_i2s_suspend(struct platform_device *dev,
+ struct snd_soc_dai *dai)
+{
+ struct sport_device *sport =
+ (struct sport_device *)dai->private_data;
+
+ pr_debug("%s : sport %d\n", __func__, dai->id);
+ if (!dai->active)
+ return 0;
+ if (dai->capture.active)
+ sport_rx_stop(sport);
+ if (dai->playback.active)
+ sport_tx_stop(sport);
+ return 0;
+}
+
+static int bf5xx_i2s_resume(struct platform_device *pdev,
+ struct snd_soc_dai *dai)
+{
+ int ret;
+ struct sport_device *sport =
+ (struct sport_device *)dai->private_data;
+
+ pr_debug("%s : sport %d\n", __func__, dai->id);
+ if (!dai->active)
+ return 0;
+
+ ret = sport_config_rx(sport_handle, RFSR | RCKFE, RSFSE|0x1f, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ ret = sport_config_tx(sport_handle, TFSR | TCKFE, TSFSE|0x1f, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ if (dai->capture.active)
+ sport_rx_start(sport);
+ if (dai->playback.active)
+ sport_tx_start(sport);
+ return 0;
+}
+
+#else
+#define bf5xx_i2s_suspend NULL
+#define bf5xx_i2s_resume NULL
+#endif
+
+#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_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+struct snd_soc_dai bf5xx_i2s_dai = {
+ .name = "bf5xx-i2s",
+ .id = 0,
+ .type = SND_SOC_DAI_I2S,
+ .probe = bf5xx_i2s_probe,
+ .suspend = bf5xx_i2s_suspend,
+ .resume = bf5xx_i2s_resume,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = BF5XX_I2S_RATES,
+ .formats = BF5XX_I2S_FORMATS,},
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = BF5XX_I2S_RATES,
+ .formats = BF5XX_I2S_FORMATS,},
+ .ops = {
+ .startup = bf5xx_i2s_startup,
+ .shutdown = bf5xx_i2s_shutdown,
+ .hw_params = bf5xx_i2s_hw_params,},
+ .dai_ops = {
+ .set_fmt = bf5xx_i2s_set_dai_fmt,
+ },
+};
+EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
+
+/* Module information */
+MODULE_AUTHOR("Cliff Cai");
+MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
+MODULE_LICENSE("GPL");
+
diff --git a/sound/soc/blackfin/bf5xx-i2s.h b/sound/soc/blackfin/bf5xx-i2s.h
new file mode 100644
index 0000000..7107d1a
--- /dev/null
+++ b/sound/soc/blackfin/bf5xx-i2s.h
@@ -0,0 +1,14 @@
+/*
+ * linux/sound/arm/bf5xx-i2s.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _BF5XX_I2S_H
+#define _BF5XX_I2S_H
+
+extern struct snd_soc_dai bf5xx_i2s_dai;
+
+#endif
--
1.5.6

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