diff options
Diffstat (limited to 'sound/soc/samsung/ac97.c')
| -rw-r--r-- | sound/soc/samsung/ac97.c | 437 |
1 files changed, 0 insertions, 437 deletions
diff --git a/sound/soc/samsung/ac97.c b/sound/soc/samsung/ac97.c deleted file mode 100644 index cbc0023..0000000 --- a/sound/soc/samsung/ac97.c +++ /dev/null @@ -1,437 +0,0 @@ -/* sound/soc/samsung/ac97.c - * - * ALSA SoC Audio Layer - S3C AC97 Controller driver - * Evolved from s3c2443-ac97.c - * - * Copyright (c) 2010 Samsung Electronics Co. Ltd - * Author: Jaswinder Singh <jassisinghbrar@gmail.com> - * Credits: Graeme Gregory, Sean Choi - * - * 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/io.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/module.h> - -#include <sound/soc.h> - -#include "regs-ac97.h" -#include <linux/platform_data/asoc-s3c.h> - -#include "dma.h" - -#define AC_CMD_ADDR(x) (x << 16) -#define AC_CMD_DATA(x) (x & 0xffff) - -#define S3C_AC97_DAI_PCM 0 -#define S3C_AC97_DAI_MIC 1 - -struct s3c_ac97_info { - struct clk *ac97_clk; - void __iomem *regs; - struct mutex lock; - struct completion done; -}; -static struct s3c_ac97_info s3c_ac97; - -static struct snd_dmaengine_dai_dma_data s3c_ac97_pcm_out = { - .addr_width = 4, -}; - -static struct snd_dmaengine_dai_dma_data s3c_ac97_pcm_in = { - .addr_width = 4, -}; - -static struct snd_dmaengine_dai_dma_data s3c_ac97_mic_in = { - .addr_width = 4, -}; - -static void s3c_ac97_activate(struct snd_ac97 *ac97) -{ - u32 ac_glbctrl, stat; - - stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7; - if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE) - return; /* Return if already active */ - - reinit_completion(&s3c_ac97.done); - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl = S3C_AC97_GLBCTRL_ACLINKON; - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - msleep(1); - - ac_glbctrl |= S3C_AC97_GLBCTRL_TRANSFERDATAENABLE; - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - msleep(1); - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE; - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - if (!wait_for_completion_timeout(&s3c_ac97.done, HZ)) - pr_err("AC97: Unable to activate!\n"); -} - -static unsigned short s3c_ac97_read(struct snd_ac97 *ac97, - unsigned short reg) -{ - u32 ac_glbctrl, ac_codec_cmd; - u32 stat, addr, data; - - mutex_lock(&s3c_ac97.lock); - - s3c_ac97_activate(ac97); - - reinit_completion(&s3c_ac97.done); - - ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); - ac_codec_cmd = S3C_AC97_CODEC_CMD_READ | AC_CMD_ADDR(reg); - writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD); - - udelay(50); - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE; - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - if (!wait_for_completion_timeout(&s3c_ac97.done, HZ)) - pr_err("AC97: Unable to read!\n"); - - stat = readl(s3c_ac97.regs + S3C_AC97_STAT); - addr = (stat >> 16) & 0x7f; - data = (stat & 0xffff); - - if (addr != reg) - pr_err("ac97: req addr = %02x, rep addr = %02x\n", - reg, addr); - - mutex_unlock(&s3c_ac97.lock); - - return (unsigned short)data; -} - -static void s3c_ac97_write(struct snd_ac97 *ac97, unsigned short reg, - unsigned short val) -{ - u32 ac_glbctrl, ac_codec_cmd; - - mutex_lock(&s3c_ac97.lock); - - s3c_ac97_activate(ac97); - - reinit_completion(&s3c_ac97.done); - - ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); - ac_codec_cmd = AC_CMD_ADDR(reg) | AC_CMD_DATA(val); - writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD); - - udelay(50); - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl |= S3C_AC97_GLBCTRL_CODECREADYIE; - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - if (!wait_for_completion_timeout(&s3c_ac97.done, HZ)) - pr_err("AC97: Unable to write!\n"); - - ac_codec_cmd = readl(s3c_ac97.regs + S3C_AC97_CODEC_CMD); - ac_codec_cmd |= S3C_AC97_CODEC_CMD_READ; - writel(ac_codec_cmd, s3c_ac97.regs + S3C_AC97_CODEC_CMD); - - mutex_unlock(&s3c_ac97.lock); -} - -static void s3c_ac97_cold_reset(struct snd_ac97 *ac97) -{ - pr_debug("AC97: Cold reset\n"); - writel(S3C_AC97_GLBCTRL_COLDRESET, - s3c_ac97.regs + S3C_AC97_GLBCTRL); - msleep(1); - - writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL); - msleep(1); -} - -static void s3c_ac97_warm_reset(struct snd_ac97 *ac97) -{ - u32 stat; - - stat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT) & 0x7; - if (stat == S3C_AC97_GLBSTAT_MAINSTATE_ACTIVE) - return; /* Return if already active */ - - pr_debug("AC97: Warm reset\n"); - - writel(S3C_AC97_GLBCTRL_WARMRESET, s3c_ac97.regs + S3C_AC97_GLBCTRL); - msleep(1); - - writel(0, s3c_ac97.regs + S3C_AC97_GLBCTRL); - msleep(1); - - s3c_ac97_activate(ac97); -} - -static irqreturn_t s3c_ac97_irq(int irq, void *dev_id) -{ - u32 ac_glbctrl, ac_glbstat; - - ac_glbstat = readl(s3c_ac97.regs + S3C_AC97_GLBSTAT); - - if (ac_glbstat & S3C_AC97_GLBSTAT_CODECREADY) { - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl &= ~S3C_AC97_GLBCTRL_CODECREADYIE; - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - complete(&s3c_ac97.done); - } - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl |= (1<<30); /* Clear interrupt */ - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - return IRQ_HANDLED; -} - -static struct snd_ac97_bus_ops s3c_ac97_ops = { - .read = s3c_ac97_read, - .write = s3c_ac97_write, - .warm_reset = s3c_ac97_warm_reset, - .reset = s3c_ac97_cold_reset, -}; - -static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd, - struct snd_soc_dai *dai) -{ - u32 ac_glbctrl; - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) - ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMINTM_MASK; - else - ac_glbctrl &= ~S3C_AC97_GLBCTRL_PCMOUTTM_MASK; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) - ac_glbctrl |= S3C_AC97_GLBCTRL_PCMINTM_DMA; - else - ac_glbctrl |= S3C_AC97_GLBCTRL_PCMOUTTM_DMA; - break; - - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - break; - } - - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - return 0; -} - -static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream, - int cmd, struct snd_soc_dai *dai) -{ - u32 ac_glbctrl; - - ac_glbctrl = readl(s3c_ac97.regs + S3C_AC97_GLBCTRL); - ac_glbctrl &= ~S3C_AC97_GLBCTRL_MICINTM_MASK; - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: - ac_glbctrl |= S3C_AC97_GLBCTRL_MICINTM_DMA; - break; - - case SNDRV_PCM_TRIGGER_STOP: - case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: - break; - } - - writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL); - - return 0; -} - -static const struct snd_soc_dai_ops s3c_ac97_dai_ops = { - .trigger = s3c_ac97_trigger, -}; - -static const struct snd_soc_dai_ops s3c_ac97_mic_dai_ops = { - .trigger = s3c_ac97_mic_trigger, -}; - -static int s3c_ac97_dai_probe(struct snd_soc_dai *dai) -{ - snd_soc_dai_init_dma_data(dai, &s3c_ac97_pcm_out, &s3c_ac97_pcm_in); - - return 0; -} - -static int s3c_ac97_mic_dai_probe(struct snd_soc_dai *dai) -{ - snd_soc_dai_init_dma_data(dai, NULL, &s3c_ac97_mic_in); - - return 0; -} - -static struct snd_soc_dai_driver s3c_ac97_dai[] = { - [S3C_AC97_DAI_PCM] = { - .name = "samsung-ac97", - .bus_control = true, - .playback = { - .stream_name = "AC97 Playback", - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_8000_48000, - .formats = SNDRV_PCM_FMTBIT_S16_LE,}, - .capture = { - .stream_name = "AC97 Capture", - .channels_min = 2, - .channels_max = 2, - .rates = SNDRV_PCM_RATE_8000_48000, - .formats = SNDRV_PCM_FMTBIT_S16_LE,}, - .probe = s3c_ac97_dai_probe, - .ops = &s3c_ac97_dai_ops, - }, - [S3C_AC97_DAI_MIC] = { - .name = "samsung-ac97-mic", - .bus_control = true, - .capture = { - .stream_name = "AC97 Mic Capture", - .channels_min = 1, - .channels_max = 1, - .rates = SNDRV_PCM_RATE_8000_48000, - .formats = SNDRV_PCM_FMTBIT_S16_LE,}, - .probe = s3c_ac97_mic_dai_probe, - .ops = &s3c_ac97_mic_dai_ops, - }, -}; - -static const struct snd_soc_component_driver s3c_ac97_component = { - .name = "s3c-ac97", -}; - -static int s3c_ac97_probe(struct platform_device *pdev) -{ - struct resource *mem_res, *irq_res; - struct s3c_audio_pdata *ac97_pdata; - int ret; - - ac97_pdata = pdev->dev.platform_data; - if (!ac97_pdata || !ac97_pdata->cfg_gpio) { - dev_err(&pdev->dev, "cfg_gpio callback not provided!\n"); - return -EINVAL; - } - - /* Check for availability of necessary resource */ - irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (!irq_res) { - dev_err(&pdev->dev, "AC97 IRQ not provided!\n"); - return -ENXIO; - } - - mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - s3c_ac97.regs = devm_ioremap_resource(&pdev->dev, mem_res); - if (IS_ERR(s3c_ac97.regs)) - return PTR_ERR(s3c_ac97.regs); - - s3c_ac97_pcm_out.filter_data = ac97_pdata->dma_playback; - s3c_ac97_pcm_out.addr = mem_res->start + S3C_AC97_PCM_DATA; - s3c_ac97_pcm_in.filter_data = ac97_pdata->dma_capture; - s3c_ac97_pcm_in.addr = mem_res->start + S3C_AC97_PCM_DATA; - s3c_ac97_mic_in.filter_data = ac97_pdata->dma_capture_mic; - s3c_ac97_mic_in.addr = mem_res->start + S3C_AC97_MIC_DATA; - - init_completion(&s3c_ac97.done); - mutex_init(&s3c_ac97.lock); - - s3c_ac97.ac97_clk = devm_clk_get(&pdev->dev, "ac97"); - if (IS_ERR(s3c_ac97.ac97_clk)) { - dev_err(&pdev->dev, "ac97 failed to get ac97_clock\n"); - ret = -ENODEV; - goto err2; - } - clk_prepare_enable(s3c_ac97.ac97_clk); - - if (ac97_pdata->cfg_gpio(pdev)) { - dev_err(&pdev->dev, "Unable to configure gpio\n"); - ret = -EINVAL; - goto err3; - } - - ret = request_irq(irq_res->start, s3c_ac97_irq, - 0, "AC97", NULL); - if (ret < 0) { - dev_err(&pdev->dev, "ac97: interrupt request failed.\n"); - goto err4; - } - - ret = snd_soc_set_ac97_ops(&s3c_ac97_ops); - if (ret != 0) { - dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret); - goto err4; - } - - ret = samsung_asoc_dma_platform_register(&pdev->dev, - ac97_pdata->dma_filter, - NULL, NULL); - if (ret) { - dev_err(&pdev->dev, "failed to get register DMA: %d\n", ret); - goto err5; - } - - ret = devm_snd_soc_register_component(&pdev->dev, &s3c_ac97_component, - s3c_ac97_dai, ARRAY_SIZE(s3c_ac97_dai)); - if (ret) - goto err5; - - return 0; -err5: - free_irq(irq_res->start, NULL); -err4: -err3: - clk_disable_unprepare(s3c_ac97.ac97_clk); -err2: - snd_soc_set_ac97_ops(NULL); - return ret; -} - -static int s3c_ac97_remove(struct platform_device *pdev) -{ - struct resource *irq_res; - - irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (irq_res) - free_irq(irq_res->start, NULL); - - clk_disable_unprepare(s3c_ac97.ac97_clk); - snd_soc_set_ac97_ops(NULL); - - return 0; -} - -static struct platform_driver s3c_ac97_driver = { - .probe = s3c_ac97_probe, - .remove = s3c_ac97_remove, - .driver = { - .name = "samsung-ac97", - }, -}; - -module_platform_driver(s3c_ac97_driver); - -MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>"); -MODULE_DESCRIPTION("AC97 driver for the Samsung SoC"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:samsung-ac97"); 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