new file mode 100644
@@ -0,0 +1,263 @@
+/*
+ * AMD ALSA SoC PCM Driver
+ *
+ * Copyright 2016 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dai.h>
+
+#include "acp3x.h"
+
+#define DRV_NAME "acp3x-i2s-audio"
+
+struct i2s_dev_data {
+ void __iomem *acp3x_base;
+ struct snd_pcm_substream *play_stream;
+ struct snd_pcm_substream *capture_stream;
+};
+
+static int acp3x_power_on(void __iomem *acp3x_base, bool on)
+{
+ u16 val, mask;
+ u32 timeout;
+
+ if (on == true) {
+ val = 1;
+ mask = ACP3x_POWER_ON;
+ } else {
+ val = 0;
+ mask = ACP3x_POWER_OFF;
+ }
+
+ rv_writel(val, acp3x_base + mmACP_PGFSM_CONTROL);
+ timeout = 0;
+ while (true) {
+ val = rv_readl(acp3x_base + mmACP_PGFSM_STATUS);
+ if ((val & ACP3x_POWER_OFF_IN_PROGRESS) == mask)
+ break;
+ if (timeout > 100) {
+ pr_err("ACP3x power state change failure\n");
+ return -ENODEV;
+ }
+ timeout++;
+ cpu_relax();
+ }
+ return 0;
+}
+
+static int acp3x_reset(void __iomem *acp3x_base)
+{
+ u32 val, timeout;
+
+ rv_writel(1, acp3x_base + mmACP_SOFT_RESET);
+ timeout = 0;
+ while (true) {
+ val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
+ if ((val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK) ||
+ timeout > 100) {
+ if (val & ACP3x_SOFT_RESET__SoftResetAudDone_MASK)
+ break;
+ return -ENODEV;
+ }
+ timeout++;
+ cpu_relax();
+ }
+
+ rv_writel(0, acp3x_base + mmACP_SOFT_RESET);
+ timeout = 0;
+ while (true) {
+ val = rv_readl(acp3x_base + mmACP_SOFT_RESET);
+ if (!val || timeout > 100) {
+ if (!val)
+ break;
+ return -ENODEV;
+ }
+ timeout++;
+ cpu_relax();
+ }
+ return 0;
+}
+
+static int acp3x_init(void __iomem *acp3x_base)
+{
+ int ret;
+
+ /* power on */
+ ret = acp3x_power_on(acp3x_base, true);
+ if (ret) {
+ pr_err("ACP3x power on failed\n");
+ return ret;
+ }
+ /* Reset */
+ ret = acp3x_reset(acp3x_base);
+ if (ret) {
+ pr_err("ACP3x reset failed\n");
+ return ret;
+ }
+ return 0;
+}
+
+static int acp3x_deinit(void __iomem *acp3x_base)
+{
+ int ret;
+
+ /* Reset */
+ ret = acp3x_reset(acp3x_base);
+ if (ret) {
+ pr_err("ACP3x reset failed\n");
+ return ret;
+ }
+ /* power off */
+ ret = acp3x_power_on(acp3x_base, false);
+ if (ret) {
+ pr_err("ACP3x power off failed\n");
+ return ret;
+ }
+ return 0;
+}
+
+static struct snd_pcm_ops acp3x_dma_ops = {
+ .open = NULL,
+ .close = NULL,
+ .ioctl = NULL,
+ .hw_params = NULL,
+ .hw_free = NULL,
+ .pointer = NULL,
+ .mmap = NULL,
+};
+
+struct snd_soc_dai_ops acp3x_dai_i2s_ops = {
+ .hw_params = NULL,
+ .trigger = NULL,
+ .set_fmt = NULL,
+};
+
+static struct snd_soc_dai_driver acp3x_i2s_dai_driver = {
+ .playback = {
+ .rates = SNDRV_PCM_RATE_8000_96000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_U8 |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 8,
+
+ .rate_min = 8000,
+ .rate_max = 96000,
+ },
+ .capture = {
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_U8 |
+ SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
+ .channels_min = 2,
+ .channels_max = 2,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ },
+ .ops = &acp3x_dai_i2s_ops,
+};
+
+static const struct snd_soc_component_driver acp3x_i2s_component = {
+ .name = DRV_NAME,
+ .ops = &acp3x_dma_ops,
+ .pcm_new = acp3x_dma_new,
+};
+
+static int acp3x_audio_probe(struct platform_device *pdev)
+{
+ int status;
+ struct resource *res;
+ struct i2s_dev_data *adata;
+ unsigned int irqflags;
+
+ if (!pdev->dev.platform_data) {
+ dev_err(&pdev->dev, "platform_data not retrieved\n");
+ return -ENODEV;
+ }
+ irqflags = *((unsigned int *)(pdev->dev.platform_data));
+
+ adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data),
+ GFP_KERNEL);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
+ return -ENODEV;
+ }
+
+ adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+
+ adata->play_stream = NULL;
+ adata->capture_stream = NULL;
+
+ dev_set_drvdata(&pdev->dev, adata);
+ /* Initialize ACP */
+ status = acp3x_init(adata->acp3x_base);
+ if (status)
+ return -ENODEV;
+ status = devm_snd_soc_register_component(&pdev->dev,
+ &acp3x_i2s_component,
+ &acp3x_i2s_dai_driver, 1);
+ if (status) {
+ dev_err(&pdev->dev, "Fail to register acp i2s dai\n");
+ goto dev_err;
+ }
+
+ return 0;
+dev_err:
+ status = acp3x_deinit(adata->acp3x_base);
+ if (status)
+ dev_err(&pdev->dev, "ACP de-init failed\n");
+ else
+ dev_info(&pdev->dev, "ACP de-initialized\n");
+ /*ignore device status and return driver probe error*/
+ return -ENODEV;
+}
+
+static int acp3x_audio_remove(struct platform_device *pdev)
+{
+ int ret;
+ struct i2s_dev_data *adata = dev_get_drvdata(&pdev->dev);
+
+ ret = acp3x_deinit(adata->acp3x_base);
+ if (ret)
+ dev_err(&pdev->dev, "ACP de-init failed\n");
+ else
+ dev_info(&pdev->dev, "ACP de-initialized\n");
+
+ return 0;
+}
+
+static struct platform_driver acp3x_dma_driver = {
+ .probe = acp3x_audio_probe,
+ .remove = acp3x_audio_remove,
+ .driver = {
+ .name = "acp3x_rv_i2s",
+ },
+};
+
+module_platform_driver(acp3x_dma_driver);
+
+MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
+MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
+MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRV_NAME);
@@ -5,6 +5,13 @@
#define ACP3x_REG_START 0x1240000
#define ACP3x_REG_END 0x1250200
#define I2S_MODE 0x04
+#define BT_TX_THRESHOLD 26
+#define BT_RX_THRESHOLD 25
+#define ACP3x_POWER_ON 0x00
+#define ACP3x_POWER_ON_IN_PROGRESS 0x01
+#define ACP3x_POWER_OFF 0x02
+#define ACP3x_POWER_OFF_IN_PROGRESS 0x03
+#define ACP3x_SOFT_RESET__SoftResetAudDone_MASK 0x00010001
static inline u32 rv_readl(void __iomem *base_addr)
{