--- /dev/null
+/*
+ * File: sound/soc/blackfin/bf5xx-ad73311.c
+ * Author: Cliff Cai <Cliff.Cai@analog.com>
+ *
+ * Created: Thur Sep 25 2008
+ * Description: Board driver for ad73311 sound chip
+ *
+ * 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/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/pcm_params.h>
+
+#include <asm/blackfin.h>
+#include <asm/cacheflush.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <asm/portmux.h>
+
+#include "../codecs/ad73311.h"
+#include "bf5xx-sport.h"
+
+#if CONFIG_SND_BF5XX_SPORT_NUM == 0
+#define bfin_write_SPORT_TCR1 bfin_write_SPORT0_TCR1
+#define bfin_read_SPORT_TCR1 bfin_read_SPORT0_TCR1
+#define bfin_write_SPORT_TCR2 bfin_write_SPORT0_TCR2
+#define bfin_write_SPORT_TX16 bfin_write_SPORT0_TX16
+#define bfin_read_SPORT_STAT bfin_read_SPORT0_STAT
+#else
+#define bfin_write_SPORT_TCR1 bfin_write_SPORT1_TCR1
+#define bfin_read_SPORT_TCR1 bfin_read_SPORT1_TCR1
+#define bfin_write_SPORT_TCR2 bfin_write_SPORT1_TCR2
+#define bfin_write_SPORT_TX16 bfin_write_SPORT1_TX16
+#define bfin_read_SPORT_STAT bfin_read_SPORT1_STAT
+#endif
+
+#define GPIO_SE CONFIG_SND_BFIN_AD73311_SE
+
+static struct snd_soc_card bf5xx_ad73311;
+
+static int snd_ad73311_startup(void)
+{
+ pr_debug("%s enter\n", __func__);
+
+ /* Pull up SE pin on AD73311L */
+ gpio_set_value(GPIO_SE, 1);
+ return 0;
+}
+
+static int snd_ad73311_configure(void)
+{
+ unsigned short ctrl_regs[6];
+ unsigned short status = 0;
+ int count = 0;
+
+ /* DMCLK = MCLK = 16.384 MHz
+ * SCLK = DMCLK/8 = 2.048 MHz
+ * Sample Rate = DMCLK/2048 = 8 KHz
+ */
+ ctrl_regs[0] = AD_CONTROL | AD_WRITE | CTRL_REG_B | REGB_MCDIV(0) | \
+ REGB_SCDIV(0) | REGB_DIRATE(0);
+ ctrl_regs[1] = AD_CONTROL | AD_WRITE | CTRL_REG_C | REGC_PUDEV | \
+ REGC_PUADC | REGC_PUDAC | REGC_PUREF | REGC_REFUSE ;
+ ctrl_regs[2] = AD_CONTROL | AD_WRITE | CTRL_REG_D | REGD_OGS(2) | \
+ REGD_IGS(2);
+ ctrl_regs[3] = AD_CONTROL | AD_WRITE | CTRL_REG_E | REGE_DA(0x1f);
+ ctrl_regs[4] = AD_CONTROL | AD_WRITE | CTRL_REG_F | REGF_SEEN ;
+ ctrl_regs[5] = AD_CONTROL | AD_WRITE | CTRL_REG_A | REGA_MODE_DATA;
+
+ local_irq_disable();
+ snd_ad73311_startup();
+ udelay(1);
+
+ bfin_write_SPORT_TCR1(TFSR);
+ bfin_write_SPORT_TCR2(0xF);
+ SSYNC();
+
+ /* SPORT Tx Register is a 8 x 16 FIFO, all the data can be put to
+ * FIFO before enable SPORT to transfer the data
+ */
+ for (count = 0; count < 6; count++)
+ bfin_write_SPORT_TX16(ctrl_regs[count]);
+ SSYNC();
+ bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() | TSPEN);
+ SSYNC();
+
+ /* When TUVF is set, the data is already send out */
+ while (!(status & TUVF) && ++count < 10000) {
+ udelay(1);
+ status = bfin_read_SPORT_STAT();
+ SSYNC();
+ }
+ bfin_write_SPORT_TCR1(bfin_read_SPORT_TCR1() & ~TSPEN);
+ SSYNC();
+ local_irq_enable();
+
+ if (count >= 10000) {
+ printk(KERN_ERR "ad73311: failed to configure codec\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int bf5xx_probe(struct snd_soc_card *card)
+{
+ int err;
+ if (gpio_request(GPIO_SE, "AD73311_SE")) {
+ printk(KERN_ERR "%s: Failed ro request GPIO_%d\n", __func__, GPIO_SE);
+ return -EBUSY;
+ }
+
+ gpio_direction_output(GPIO_SE, 0);
+
+ err = snd_ad73311_configure();
+ if (err < 0)
+ return -EFAULT;
+
+ return 0;
+}
+
+#define BF5XX_AD7311_DAI_FMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF | \
+ SND_SOC_DAIFMT_CBM_CFM)
+
+static struct snd_soc_dai_link bf5xx_ad73311_dai[] = {
+ {
+ .name = "ad73311",
+ .stream_name = "AD73311",
+ .cpu_dai_name = "bfin-i2s.0",
+ .codec_dai_name = "ad73311-hifi",
+ .platform_name = "bfin-i2s-pcm-audio",
+ .codec_name = "ad73311",
+ .dai_fmt = BF5XX_AD7311_DAI_FMT,
+ },
+ {
+ .name = "ad73311",
+ .stream_name = "AD73311",
+ .cpu_dai_name = "bfin-i2s.1",
+ .codec_dai_name = "ad73311-hifi",
+ .platform_name = "bfin-i2s-pcm-audio",
+ .codec_name = "ad73311",
+ .dai_fmt = BF5XX_AD7311_DAI_FMT,
+ },
+};
+
+static struct snd_soc_card bf5xx_ad73311 = {
+ .name = "bfin-ad73311",
+ .owner = THIS_MODULE,
+ .probe = bf5xx_probe,
+ .dai_link = &bf5xx_ad73311_dai[CONFIG_SND_BF5XX_SPORT_NUM],
+ .num_links = 1,
+};
+
+static struct platform_device *bf5xx_ad73311_snd_device;
+
+static int __init bf5xx_ad73311_init(void)
+{
+ int ret;
+
+ pr_debug("%s enter\n", __func__);
+ bf5xx_ad73311_snd_device = platform_device_alloc("soc-audio", -1);
+ if (!bf5xx_ad73311_snd_device)
+ return -ENOMEM;
+
+ platform_set_drvdata(bf5xx_ad73311_snd_device, &bf5xx_ad73311);
+ ret = platform_device_add(bf5xx_ad73311_snd_device);
+
+ if (ret)
+ platform_device_put(bf5xx_ad73311_snd_device);
+
+ return ret;
+}
+
+static void __exit bf5xx_ad73311_exit(void)
+{
+ pr_debug("%s enter\n", __func__);
+ platform_device_unregister(bf5xx_ad73311_snd_device);
+}
+
+module_init(bf5xx_ad73311_init);
+module_exit(bf5xx_ad73311_exit);
+
+/* Module information */
+MODULE_AUTHOR("Cliff Cai");
+MODULE_DESCRIPTION("ALSA SoC AD73311 Blackfin");
+MODULE_LICENSE("GPL");
+
Code Review / kvmfornfv.git / blobdiff