Index: sound/soc/tegra/tegra_spdif.c |
diff --git a/sound/soc/tegra/tegra_spdif.c b/sound/soc/tegra/tegra_spdif.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..731934847152845aa84e846a3a64e7818576e5c0 |
--- /dev/null |
+++ b/sound/soc/tegra/tegra_spdif.c |
@@ -0,0 +1,378 @@ |
+/* |
+ * 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 <mach/dc.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; |
+ |
+ 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); |
+ } |
+ |
+ 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, int id) |
+{ |
+ 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, srate, 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; |
+ } |
+ |
+ srate = params_rate(params); |
+ 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; |
+ } |
+ |
+ /* FIXME: Should this be in a codec driver? */ |
+ ret = tegra_dc_hdmi_set_audio_sample_rate(srate); |
+ if (ret) { |
+ dev_err(dev, "Can't configure HDMI controller: %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 struct snd_soc_dai_ops tegra_spdif_dai_ops = { |
+ .hw_params = tegra_spdif_hw_params, |
+ .trigger = tegra_spdif_trigger, |
+}; |
+ |
+struct snd_soc_dai_driver tegra_spdif_dai = { |
+ .name = DRV_NAME ".0", |
+ .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_sys("spdif_out", NULL); |
+ 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, pdev->id); |
+ |
+ 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), |
+}; |
+ |
+static int __init snd_tegra_spdif_init(void) |
+{ |
+ return platform_driver_register(&tegra_spdif_driver); |
+} |
+module_init(snd_tegra_spdif_init); |
+ |
+static void __exit snd_tegra_spdif_exit(void) |
+{ |
+ platform_driver_unregister(&tegra_spdif_driver); |
+} |
+module_exit(snd_tegra_spdif_exit); |
+ |
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>"); |
+MODULE_DESCRIPTION("Tegra SPDIF ASoC driver"); |
+MODULE_LICENSE("GPL"); |