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-rw-r--r--kernel/sound/soc/blackfin/bf5xx-ac97.c388
1 files changed, 388 insertions, 0 deletions
diff --git a/kernel/sound/soc/blackfin/bf5xx-ac97.c b/kernel/sound/soc/blackfin/bf5xx-ac97.c
new file mode 100644
index 000000000..a040cfe29
--- /dev/null
+++ b/kernel/sound/soc/blackfin/bf5xx-ac97.c
@@ -0,0 +1,388 @@
+/*
+ * bf5xx-ac97.c -- AC97 support for the ADI blackfin chip.
+ *
+ * Author: Roy Huang
+ * Created: 11th. June 2007
+ * Copyright: Analog Device Inc.
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/wait.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/ac97_codec.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-ac97.h"
+
+/* Anomaly notes:
+ * 05000250 - AD1980 is running in TDM mode and RFS/TFS are generated by SPORT
+ * contrtoller. But, RFSDIV and TFSDIV are always set to 16*16-1,
+ * while the max AC97 data size is 13*16. The DIV is always larger
+ * than data size. AD73311 and ad2602 are not running in TDM mode.
+ * AD1836 and AD73322 depend on external RFS/TFS only. So, this
+ * anomaly does not affect blackfin sound drivers.
+*/
+
+static struct sport_device *ac97_sport_handle;
+
+void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src,
+ size_t count, unsigned int chan_mask)
+{
+ while (count--) {
+ dst->ac97_tag = TAG_VALID;
+ if (chan_mask & SP_FL) {
+ dst->ac97_pcm_r = *src++;
+ dst->ac97_tag |= TAG_PCM_RIGHT;
+ }
+ if (chan_mask & SP_FR) {
+ dst->ac97_pcm_l = *src++;
+ dst->ac97_tag |= TAG_PCM_LEFT;
+
+ }
+#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
+ if (chan_mask & SP_SR) {
+ dst->ac97_sl = *src++;
+ dst->ac97_tag |= TAG_PCM_SL;
+ }
+ if (chan_mask & SP_SL) {
+ dst->ac97_sr = *src++;
+ dst->ac97_tag |= TAG_PCM_SR;
+ }
+ if (chan_mask & SP_LFE) {
+ dst->ac97_lfe = *src++;
+ dst->ac97_tag |= TAG_PCM_LFE;
+ }
+ if (chan_mask & SP_FC) {
+ dst->ac97_center = *src++;
+ dst->ac97_tag |= TAG_PCM_CENTER;
+ }
+#endif
+ dst++;
+ }
+}
+EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
+
+void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst,
+ size_t count)
+{
+ while (count--) {
+ *(dst++) = src->ac97_pcm_l;
+ *(dst++) = src->ac97_pcm_r;
+ src++;
+ }
+}
+EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
+
+static unsigned int sport_tx_curr_frag(struct sport_device *sport)
+{
+ return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
+ sport->tx_fragsize;
+}
+
+static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
+{
+ struct sport_device *sport = ac97_sport_handle;
+ int *cmd_count = sport->private_data;
+ int nextfrag = sport_tx_curr_frag(sport);
+ struct ac97_frame *nextwrite;
+
+ sport_incfrag(sport, &nextfrag, 1);
+
+ nextwrite = (struct ac97_frame *)(sport->tx_buf +
+ nextfrag * sport->tx_fragsize);
+ pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
+ sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
+ nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
+ nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
+ nextwrite[cmd_count[nextfrag]].ac97_data = data;
+ ++cmd_count[nextfrag];
+ pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
+ addr >> 8, data, nextfrag);
+}
+
+static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
+ unsigned short reg)
+{
+ struct sport_device *sport_handle = ac97_sport_handle;
+ struct ac97_frame out_frame[2], in_frame[2];
+
+ pr_debug("%s enter 0x%x\n", __func__, reg);
+
+ /* When dma descriptor is enabled, the register should not be read */
+ if (sport_handle->tx_run || sport_handle->rx_run) {
+ pr_err("Could you send a mail to cliff.cai@analog.com "
+ "to report this?\n");
+ return -EFAULT;
+ }
+
+ memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
+ memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
+ out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
+ out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
+ sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
+ (unsigned char *)&in_frame,
+ 2 * sizeof(struct ac97_frame));
+ return in_frame[1].ac97_data;
+}
+
+void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ struct sport_device *sport_handle = ac97_sport_handle;
+
+ pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
+
+ if (sport_handle->tx_run) {
+ enqueue_cmd(ac97, (reg << 8), val); /* write */
+ enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */
+ } else {
+ struct ac97_frame frame;
+ memset(&frame, 0, sizeof(struct ac97_frame));
+ frame.ac97_tag = TAG_VALID | TAG_CMD;
+ frame.ac97_addr = (reg << 8);
+ frame.ac97_data = val;
+ sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
+ NULL, sizeof(struct ac97_frame));
+ }
+}
+
+static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+ struct sport_device *sport_handle = ac97_sport_handle;
+ u16 gpio = P_IDENT(sport_handle->pin_req[3]);
+
+ pr_debug("%s enter\n", __func__);
+
+ peripheral_free_list(sport_handle->pin_req);
+ gpio_request(gpio, "bf5xx-ac97");
+ gpio_direction_output(gpio, 1);
+ udelay(2);
+ gpio_set_value(gpio, 0);
+ udelay(1);
+ gpio_free(gpio);
+ peripheral_request_list(sport_handle->pin_req, "soc-audio");
+}
+
+static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
+{
+#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
+ pr_debug("%s enter\n", __func__);
+
+ /* It is specified for bf548-ezkit */
+ gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
+ /* Keep reset pin low for 1 ms */
+ mdelay(1);
+ gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
+ /* Wait for bit clock recover */
+ mdelay(1);
+#else
+ pr_info("%s: Not implemented\n", __func__);
+#endif
+}
+
+static struct snd_ac97_bus_ops bf5xx_ac97_ops = {
+ .read = bf5xx_ac97_read,
+ .write = bf5xx_ac97_write,
+ .warm_reset = bf5xx_ac97_warm_reset,
+ .reset = bf5xx_ac97_cold_reset,
+};
+
+#ifdef CONFIG_PM
+static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
+{
+ struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
+
+ 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_ac97_resume(struct snd_soc_dai *dai)
+{
+ int ret;
+ struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
+
+ pr_debug("%s : sport %d\n", __func__, dai->id);
+ if (!dai->active)
+ return 0;
+
+#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
+ ret = sport_set_multichannel(sport, 16, 0x3FF, 0x3FF, 1);
+#else
+ ret = sport_set_multichannel(sport, 16, 0x1F, 0x1F, 1);
+#endif
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ ret = sport_config_rx(sport, IRFS, 0xF, 0, (16*16-1));
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ ret = sport_config_tx(sport, ITFS, 0xF, 0, (16*16-1));
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+#else
+#define bf5xx_ac97_suspend NULL
+#define bf5xx_ac97_resume NULL
+#endif
+
+static struct snd_soc_dai_driver bfin_ac97_dai = {
+ .bus_control = true,
+ .suspend = bf5xx_ac97_suspend,
+ .resume = bf5xx_ac97_resume,
+ .playback = {
+ .stream_name = "AC97 Playback",
+ .channels_min = 2,
+#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
+ .channels_max = 6,
+#else
+ .channels_max = 2,
+#endif
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE, },
+ .capture = {
+ .stream_name = "AC97 Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE, },
+};
+
+static const struct snd_soc_component_driver bfin_ac97_component = {
+ .name = "bfin-ac97",
+};
+
+static int asoc_bfin_ac97_probe(struct platform_device *pdev)
+{
+ struct sport_device *sport_handle;
+ int ret;
+
+#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
+ /* Request PB3 as reset pin */
+ ret = devm_gpio_request_one(&pdev->dev,
+ CONFIG_SND_BF5XX_RESET_GPIO_NUM,
+ GPIOF_OUT_INIT_HIGH, "SND_AD198x RESET");
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to request GPIO_%d for reset: %d\n",
+ CONFIG_SND_BF5XX_RESET_GPIO_NUM, ret);
+ return ret;
+ }
+#endif
+
+ sport_handle = sport_init(pdev, 2, sizeof(struct ac97_frame),
+ PAGE_SIZE);
+ if (!sport_handle) {
+ ret = -ENODEV;
+ goto sport_err;
+ }
+
+ /*SPORT works in TDM mode to simulate AC97 transfers*/
+#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
+ ret = sport_set_multichannel(sport_handle, 16, 0x3FF, 0x3FF, 1);
+#else
+ ret = sport_set_multichannel(sport_handle, 16, 0x1F, 0x1F, 1);
+#endif
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ goto sport_config_err;
+ }
+
+ ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ goto sport_config_err;
+ }
+
+ ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
+ if (ret) {
+ pr_err("SPORT is busy!\n");
+ ret = -EBUSY;
+ goto sport_config_err;
+ }
+
+ ret = snd_soc_set_ac97_ops(&bf5xx_ac97_ops);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret);
+ goto sport_config_err;
+ }
+
+ ret = snd_soc_register_component(&pdev->dev, &bfin_ac97_component,
+ &bfin_ac97_dai, 1);
+ if (ret) {
+ pr_err("Failed to register DAI: %d\n", ret);
+ goto sport_config_err;
+ }
+
+ ac97_sport_handle = sport_handle;
+
+ return 0;
+
+sport_config_err:
+ sport_done(sport_handle);
+sport_err:
+ snd_soc_set_ac97_ops(NULL);
+
+ return ret;
+}
+
+static int asoc_bfin_ac97_remove(struct platform_device *pdev)
+{
+ struct sport_device *sport_handle = platform_get_drvdata(pdev);
+
+ snd_soc_unregister_component(&pdev->dev);
+ sport_done(sport_handle);
+ snd_soc_set_ac97_ops(NULL);
+
+ return 0;
+}
+
+static struct platform_driver asoc_bfin_ac97_driver = {
+ .driver = {
+ .name = "bfin-ac97",
+ },
+
+ .probe = asoc_bfin_ac97_probe,
+ .remove = asoc_bfin_ac97_remove,
+};
+
+module_platform_driver(asoc_bfin_ac97_driver);
+
+MODULE_AUTHOR("Roy Huang");
+MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
+MODULE_LICENSE("GPL");