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Diffstat (limited to 'sound/soc/tegra/tegra_spdif.c')
-rw-r--r--sound/soc/tegra/tegra_spdif.c364
1 files changed, 0 insertions, 364 deletions
diff --git a/sound/soc/tegra/tegra_spdif.c b/sound/soc/tegra/tegra_spdif.c
deleted file mode 100644
index 9ff2c601445f..000000000000
--- a/sound/soc/tegra/tegra_spdif.c
+++ /dev/null
@@ -1,364 +0,0 @@
-/*
- * tegra_spdif.c - Tegra SPDIF driver
- *
- * Author: Stephen Warren <swarren@nvidia.com>
- * Copyright (C) 2011 - NVIDIA, 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.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- */
-
-#include <linux/clk.h>
-#include <linux/module.h>
-#include <linux/debugfs.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-#include <mach/iomap.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-#include "tegra_spdif.h"
-
-#define DRV_NAME "tegra-spdif"
-
-static inline void tegra_spdif_write(struct tegra_spdif *spdif, u32 reg,
- u32 val)
-{
- __raw_writel(val, spdif->regs + reg);
-}
-
-static inline u32 tegra_spdif_read(struct tegra_spdif *spdif, u32 reg)
-{
- return __raw_readl(spdif->regs + reg);
-}
-
-#ifdef CONFIG_DEBUG_FS
-static int tegra_spdif_show(struct seq_file *s, void *unused)
-{
-#define REG(r) { r, #r }
- static const struct {
- int offset;
- const char *name;
- } regs[] = {
- REG(TEGRA_SPDIF_CTRL),
- REG(TEGRA_SPDIF_STATUS),
- REG(TEGRA_SPDIF_STROBE_CTRL),
- REG(TEGRA_SPDIF_DATA_FIFO_CSR),
- REG(TEGRA_SPDIF_CH_STA_RX_A),
- REG(TEGRA_SPDIF_CH_STA_RX_B),
- REG(TEGRA_SPDIF_CH_STA_RX_C),
- REG(TEGRA_SPDIF_CH_STA_RX_D),
- REG(TEGRA_SPDIF_CH_STA_RX_E),
- REG(TEGRA_SPDIF_CH_STA_RX_F),
- REG(TEGRA_SPDIF_CH_STA_TX_A),
- REG(TEGRA_SPDIF_CH_STA_TX_B),
- REG(TEGRA_SPDIF_CH_STA_TX_C),
- REG(TEGRA_SPDIF_CH_STA_TX_D),
- REG(TEGRA_SPDIF_CH_STA_TX_E),
- REG(TEGRA_SPDIF_CH_STA_TX_F),
- };
-#undef REG
-
- struct tegra_spdif *spdif = s->private;
- int i;
-
- clk_enable(spdif->clk_spdif_out);
-
- for (i = 0; i < ARRAY_SIZE(regs); i++) {
- u32 val = tegra_spdif_read(spdif, regs[i].offset);
- seq_printf(s, "%s = %08x\n", regs[i].name, val);
- }
-
- clk_disable(spdif->clk_spdif_out);
-
- return 0;
-}
-
-static int tegra_spdif_debug_open(struct inode *inode, struct file *file)
-{
- return single_open(file, tegra_spdif_show, inode->i_private);
-}
-
-static const struct file_operations tegra_spdif_debug_fops = {
- .open = tegra_spdif_debug_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static void tegra_spdif_debug_add(struct tegra_spdif *spdif)
-{
- spdif->debug = debugfs_create_file(DRV_NAME, S_IRUGO,
- snd_soc_debugfs_root, spdif,
- &tegra_spdif_debug_fops);
-}
-
-static void tegra_spdif_debug_remove(struct tegra_spdif *spdif)
-{
- if (spdif->debug)
- debugfs_remove(spdif->debug);
-}
-#else
-static inline void tegra_spdif_debug_add(struct tegra_spdif *spdif)
-{
-}
-
-static inline void tegra_spdif_debug_remove(struct tegra_spdif *spdif)
-{
-}
-#endif
-
-static int tegra_spdif_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
-{
- struct device *dev = substream->pcm->card->dev;
- struct tegra_spdif *spdif = snd_soc_dai_get_drvdata(dai);
- int ret, spdifclock;
-
- spdif->reg_ctrl &= ~TEGRA_SPDIF_CTRL_PACK;
- spdif->reg_ctrl &= ~TEGRA_SPDIF_CTRL_BIT_MODE_MASK;
- switch (params_format(params)) {
- case SNDRV_PCM_FORMAT_S16_LE:
- spdif->reg_ctrl |= TEGRA_SPDIF_CTRL_PACK;
- spdif->reg_ctrl |= TEGRA_SPDIF_CTRL_BIT_MODE_16BIT;
- break;
- default:
- return -EINVAL;
- }
-
- switch (params_rate(params)) {
- case 32000:
- spdifclock = 4096000;
- break;
- case 44100:
- spdifclock = 5644800;
- break;
- case 48000:
- spdifclock = 6144000;
- break;
- case 88200:
- spdifclock = 11289600;
- break;
- case 96000:
- spdifclock = 12288000;
- break;
- case 176400:
- spdifclock = 22579200;
- break;
- case 192000:
- spdifclock = 24576000;
- break;
- default:
- return -EINVAL;
- }
-
- ret = clk_set_rate(spdif->clk_spdif_out, spdifclock);
- if (ret) {
- dev_err(dev, "Can't set SPDIF clock rate: %d\n", ret);
- return ret;
- }
-
- return 0;
-}
-
-static void tegra_spdif_start_playback(struct tegra_spdif *spdif)
-{
- spdif->reg_ctrl |= TEGRA_SPDIF_CTRL_TX_EN;
- tegra_spdif_write(spdif, TEGRA_SPDIF_CTRL, spdif->reg_ctrl);
-}
-
-static void tegra_spdif_stop_playback(struct tegra_spdif *spdif)
-{
- spdif->reg_ctrl &= ~TEGRA_SPDIF_CTRL_TX_EN;
- tegra_spdif_write(spdif, TEGRA_SPDIF_CTRL, spdif->reg_ctrl);
-}
-
-static int tegra_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
-{
- struct tegra_spdif *spdif = snd_soc_dai_get_drvdata(dai);
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- case SNDRV_PCM_TRIGGER_RESUME:
- if (!spdif->clk_refs)
- clk_enable(spdif->clk_spdif_out);
- spdif->clk_refs++;
- tegra_spdif_start_playback(spdif);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- tegra_spdif_stop_playback(spdif);
- spdif->clk_refs--;
- if (!spdif->clk_refs)
- clk_disable(spdif->clk_spdif_out);
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int tegra_spdif_probe(struct snd_soc_dai *dai)
-{
- struct tegra_spdif *spdif = snd_soc_dai_get_drvdata(dai);
-
- dai->capture_dma_data = NULL;
- dai->playback_dma_data = &spdif->playback_dma_data;
-
- return 0;
-}
-
-static const struct snd_soc_dai_ops tegra_spdif_dai_ops = {
- .hw_params = tegra_spdif_hw_params,
- .trigger = tegra_spdif_trigger,
-};
-
-static struct snd_soc_dai_driver tegra_spdif_dai = {
- .name = DRV_NAME,
- .probe = tegra_spdif_probe,
- .playback = {
- .channels_min = 2,
- .channels_max = 2,
- .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
- SNDRV_PCM_RATE_48000,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- },
- .ops = &tegra_spdif_dai_ops,
-};
-
-static __devinit int tegra_spdif_platform_probe(struct platform_device *pdev)
-{
- struct tegra_spdif *spdif;
- struct resource *mem, *memregion, *dmareq;
- int ret;
-
- spdif = kzalloc(sizeof(struct tegra_spdif), GFP_KERNEL);
- if (!spdif) {
- dev_err(&pdev->dev, "Can't allocate tegra_spdif\n");
- ret = -ENOMEM;
- goto exit;
- }
- dev_set_drvdata(&pdev->dev, spdif);
-
- spdif->clk_spdif_out = clk_get(&pdev->dev, "spdif_out");
- if (IS_ERR(spdif->clk_spdif_out)) {
- pr_err("Can't retrieve spdif clock\n");
- ret = PTR_ERR(spdif->clk_spdif_out);
- goto err_free;
- }
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem) {
- dev_err(&pdev->dev, "No memory resource\n");
- ret = -ENODEV;
- goto err_clk_put;
- }
-
- dmareq = platform_get_resource(pdev, IORESOURCE_DMA, 0);
- if (!dmareq) {
- dev_err(&pdev->dev, "No DMA resource\n");
- ret = -ENODEV;
- goto err_clk_put;
- }
-
- memregion = request_mem_region(mem->start, resource_size(mem),
- DRV_NAME);
- if (!memregion) {
- dev_err(&pdev->dev, "Memory region already claimed\n");
- ret = -EBUSY;
- goto err_clk_put;
- }
-
- spdif->regs = ioremap(mem->start, resource_size(mem));
- if (!spdif->regs) {
- dev_err(&pdev->dev, "ioremap failed\n");
- ret = -ENOMEM;
- goto err_release;
- }
-
- spdif->playback_dma_data.addr = mem->start + TEGRA_SPDIF_DATA_OUT;
- spdif->playback_dma_data.wrap = 4;
- spdif->playback_dma_data.width = 32;
- spdif->playback_dma_data.req_sel = dmareq->start;
-
- ret = snd_soc_register_dai(&pdev->dev, &tegra_spdif_dai);
- if (ret) {
- dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);
- ret = -ENOMEM;
- goto err_unmap;
- }
-
- tegra_spdif_debug_add(spdif);
-
- return 0;
-
-err_unmap:
- iounmap(spdif->regs);
-err_release:
- release_mem_region(mem->start, resource_size(mem));
-err_clk_put:
- clk_put(spdif->clk_spdif_out);
-err_free:
- kfree(spdif);
-exit:
- return ret;
-}
-
-static int __devexit tegra_spdif_platform_remove(struct platform_device *pdev)
-{
- struct tegra_spdif *spdif = dev_get_drvdata(&pdev->dev);
- struct resource *res;
-
- snd_soc_unregister_dai(&pdev->dev);
-
- tegra_spdif_debug_remove(spdif);
-
- iounmap(spdif->regs);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- release_mem_region(res->start, resource_size(res));
-
- clk_put(spdif->clk_spdif_out);
-
- kfree(spdif);
-
- return 0;
-}
-
-static struct platform_driver tegra_spdif_driver = {
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
- .probe = tegra_spdif_platform_probe,
- .remove = __devexit_p(tegra_spdif_platform_remove),
-};
-
-module_platform_driver(tegra_spdif_driver);
-
-MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
-MODULE_DESCRIPTION("Tegra SPDIF ASoC driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRV_NAME);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-01 22:06:49 +0300