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-rw-r--r--sound/soc/blackfin/bf5xx-tdm.c343
1 files changed, 343 insertions, 0 deletions
diff --git a/sound/soc/blackfin/bf5xx-tdm.c b/sound/soc/blackfin/bf5xx-tdm.c
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+/*
+ * File: sound/soc/blackfin/bf5xx-tdm.c
+ * Author: Barry Song <Barry.Song@analog.com>
+ *
+ * Created: Thurs June 04 2009
+ * Description: Blackfin I2S(TDM) CPU DAI driver
+ * Even though TDM mode can be as part of I2S DAI, but there
+ * are so much difference in configuration and data flow,
+ * it's very ugly to integrate I2S and TDM into a module
+ *
+ * Modified:
+ * Copyright 2009 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 <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-tdm.h"
+
+struct bf5xx_tdm_port {
+ u16 tcr1;
+ u16 rcr1;
+ u16 tcr2;
+ u16 rcr2;
+ int configured;
+};
+
+static struct bf5xx_tdm_port bf5xx_tdm;
+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,
+ }
+};
+
+/*
+ * Setting the TFS pin selector for SPORT 0 based on whether the selected
+ * port id F or G. If the port is F then no conflict should exist for the
+ * TFS. When Port G is selected and EMAC then there is a conflict between
+ * the PHY interrupt line and TFS. Current settings prevent the conflict
+ * by ignoring the TFS pin when Port G is selected. This allows both
+ * ssm2602 using Port G and EMAC concurrently.
+ */
+#ifdef CONFIG_BF527_SPORT0_PORTF
+#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
+#else
+#define LOCAL_SPORT0_TFS (0)
+#endif
+
+static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
+ P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
+ {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
+ P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
+
+static int bf5xx_tdm_set_dai_fmt(struct snd_soc_dai *cpu_dai,
+ unsigned int fmt)
+{
+ int ret = 0;
+
+ /* interface format:support TDM,slave mode */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_DSP_A:
+ break;
+ default:
+ printk(KERN_ERR "%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:
+ printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static int bf5xx_tdm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ int ret = 0;
+
+ bf5xx_tdm.tcr2 &= ~0x1f;
+ bf5xx_tdm.rcr2 &= ~0x1f;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S32_LE:
+ bf5xx_tdm.tcr2 |= 31;
+ bf5xx_tdm.rcr2 |= 31;
+ sport_handle->wdsize = 4;
+ break;
+ /* at present, we only support 32bit transfer */
+ default:
+ pr_err("not supported PCM format yet\n");
+ return -EINVAL;
+ break;
+ }
+
+ if (!bf5xx_tdm.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.
+ */
+ ret = sport_config_rx(sport_handle, bf5xx_tdm.rcr1,
+ bf5xx_tdm.rcr2, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ ret = sport_config_tx(sport_handle, bf5xx_tdm.tcr1,
+ bf5xx_tdm.tcr2, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ bf5xx_tdm.configured = 1;
+ }
+
+ return 0;
+}
+
+static void bf5xx_tdm_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ /* No active stream, SPORT is allowed to be configured again. */
+ if (!dai->active)
+ bf5xx_tdm.configured = 0;
+}
+
+#ifdef CONFIG_PM
+static int bf5xx_tdm_suspend(struct snd_soc_dai *dai)
+{
+ struct sport_device *sport =
+ (struct sport_device *)dai->private_data;
+
+ 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_tdm_resume(struct snd_soc_dai *dai)
+{
+ int ret;
+ struct sport_device *sport =
+ (struct sport_device *)dai->private_data;
+
+ if (!dai->active)
+ return 0;
+
+ ret = sport_set_multichannel(sport, 8, 0xFF, 1);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ }
+
+ ret = sport_config_rx(sport, IRFS, 0x1F, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ }
+
+ ret = sport_config_tx(sport, ITFS, 0x1F, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ }
+
+ return 0;
+}
+
+#else
+#define bf5xx_tdm_suspend NULL
+#define bf5xx_tdm_resume NULL
+#endif
+
+static struct snd_soc_dai_ops bf5xx_tdm_dai_ops = {
+ .hw_params = bf5xx_tdm_hw_params,
+ .set_fmt = bf5xx_tdm_set_dai_fmt,
+ .shutdown = bf5xx_tdm_shutdown,
+};
+
+struct snd_soc_dai bf5xx_tdm_dai = {
+ .name = "bf5xx-tdm",
+ .id = 0,
+ .suspend = bf5xx_tdm_suspend,
+ .resume = bf5xx_tdm_resume,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,},
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S32_LE,},
+ .ops = &bf5xx_tdm_dai_ops,
+};
+EXPORT_SYMBOL_GPL(bf5xx_tdm_dai);
+
+static int __devinit bfin_tdm_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+
+ 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, \
+ 8 * sizeof(u32), NULL);
+ if (!sport_handle) {
+ peripheral_free_list(&sport_req[sport_num][0]);
+ return -ENODEV;
+ }
+
+ /* SPORT works in TDM mode */
+ ret = sport_set_multichannel(sport_handle, 8, 0xFF, 1);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ goto sport_config_err;
+ }
+
+ ret = sport_config_rx(sport_handle, IRFS, 0x1F, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ goto sport_config_err;
+ }
+
+ ret = sport_config_tx(sport_handle, ITFS, 0x1F, 0, 0);
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ goto sport_config_err;
+ }
+
+ ret = snd_soc_register_dai(&bf5xx_tdm_dai);
+ if (ret) {
+ pr_err("Failed to register DAI: %d\n", ret);
+ goto sport_config_err;
+ }
+ return 0;
+
+sport_config_err:
+ peripheral_free_list(&sport_req[sport_num][0]);
+ return ret;
+}
+
+static int __devexit bfin_tdm_remove(struct platform_device *pdev)
+{
+ peripheral_free_list(&sport_req[sport_num][0]);
+ snd_soc_unregister_dai(&bf5xx_tdm_dai);
+
+ return 0;
+}
+
+static struct platform_driver bfin_tdm_driver = {
+ .probe = bfin_tdm_probe,
+ .remove = __devexit_p(bfin_tdm_remove),
+ .driver = {
+ .name = "bfin-tdm",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init bfin_tdm_init(void)
+{
+ return platform_driver_register(&bfin_tdm_driver);
+}
+module_init(bfin_tdm_init);
+
+static void __exit bfin_tdm_exit(void)
+{
+ platform_driver_unregister(&bfin_tdm_driver);
+}
+module_exit(bfin_tdm_exit);
+
+/* Module information */
+MODULE_AUTHOR("Barry Song");
+MODULE_DESCRIPTION("TDM driver for ADI Blackfin");
+MODULE_LICENSE("GPL");
+
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