+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * ASoC driver for Cirrus Logic EP93xx AC97 controller.
- *
- * Copyright (c) 2010 Mika Westerberg
- *
- * Based on s3c-ac97 ASoC driver by Jaswinder Singh.
- */
-
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-
-#include <sound/core.h>
-#include <sound/dmaengine_pcm.h>
-#include <sound/ac97_codec.h>
-#include <sound/soc.h>
-
-#include <linux/platform_data/dma-ep93xx.h>
-#include <linux/soc/cirrus/ep93xx.h>
-
-#include "ep93xx-pcm.h"
-
-/*
- * Per channel (1-4) registers.
- */
-#define AC97CH(n) (((n) - 1) * 0x20)
-
-#define AC97DR(n) (AC97CH(n) + 0x0000)
-
-#define AC97RXCR(n) (AC97CH(n) + 0x0004)
-#define AC97RXCR_REN BIT(0)
-#define AC97RXCR_RX3 BIT(3)
-#define AC97RXCR_RX4 BIT(4)
-#define AC97RXCR_CM BIT(15)
-
-#define AC97TXCR(n) (AC97CH(n) + 0x0008)
-#define AC97TXCR_TEN BIT(0)
-#define AC97TXCR_TX3 BIT(3)
-#define AC97TXCR_TX4 BIT(4)
-#define AC97TXCR_CM BIT(15)
-
-#define AC97SR(n) (AC97CH(n) + 0x000c)
-#define AC97SR_TXFE BIT(1)
-#define AC97SR_TXUE BIT(6)
-
-#define AC97RISR(n) (AC97CH(n) + 0x0010)
-#define AC97ISR(n) (AC97CH(n) + 0x0014)
-#define AC97IE(n) (AC97CH(n) + 0x0018)
-
-/*
- * Global AC97 controller registers.
- */
-#define AC97S1DATA 0x0080
-#define AC97S2DATA 0x0084
-#define AC97S12DATA 0x0088
-
-#define AC97RGIS 0x008c
-#define AC97GIS 0x0090
-#define AC97IM 0x0094
-/*
- * Common bits for RGIS, GIS and IM registers.
- */
-#define AC97_SLOT2RXVALID BIT(1)
-#define AC97_CODECREADY BIT(5)
-#define AC97_SLOT2TXCOMPLETE BIT(6)
-
-#define AC97EOI 0x0098
-#define AC97EOI_WINT BIT(0)
-#define AC97EOI_CODECREADY BIT(1)
-
-#define AC97GCR 0x009c
-#define AC97GCR_AC97IFE BIT(0)
-
-#define AC97RESET 0x00a0
-#define AC97RESET_TIMEDRESET BIT(0)
-
-#define AC97SYNC 0x00a4
-#define AC97SYNC_TIMEDSYNC BIT(0)
-
-#define AC97_TIMEOUT msecs_to_jiffies(5)
-
-/**
- * struct ep93xx_ac97_info - EP93xx AC97 controller info structure
- * @lock: mutex serializing access to the bus (slot 1 & 2 ops)
- * @dev: pointer to the platform device dev structure
- * @regs: mapped AC97 controller registers
- * @done: bus ops wait here for an interrupt
- */
-struct ep93xx_ac97_info {
- struct mutex lock;
- struct device *dev;
- void __iomem *regs;
- struct completion done;
- struct snd_dmaengine_dai_dma_data dma_params_rx;
- struct snd_dmaengine_dai_dma_data dma_params_tx;
-};
-
-/* currently ALSA only supports a single AC97 device */
-static struct ep93xx_ac97_info *ep93xx_ac97_info;
-
-static struct ep93xx_dma_data ep93xx_ac97_pcm_out = {
- .name = "ac97-pcm-out",
- .port = EP93XX_DMA_AAC1,
- .direction = DMA_MEM_TO_DEV,
-};
-
-static struct ep93xx_dma_data ep93xx_ac97_pcm_in = {
- .name = "ac97-pcm-in",
- .port = EP93XX_DMA_AAC1,
- .direction = DMA_DEV_TO_MEM,
-};
-
-static inline unsigned ep93xx_ac97_read_reg(struct ep93xx_ac97_info *info,
- unsigned reg)
-{
- return __raw_readl(info->regs + reg);
-}
-
-static inline void ep93xx_ac97_write_reg(struct ep93xx_ac97_info *info,
- unsigned reg, unsigned val)
-{
- __raw_writel(val, info->regs + reg);
-}
-
-static unsigned short ep93xx_ac97_read(struct snd_ac97 *ac97,
- unsigned short reg)
-{
- struct ep93xx_ac97_info *info = ep93xx_ac97_info;
- unsigned short val;
-
- mutex_lock(&info->lock);
-
- ep93xx_ac97_write_reg(info, AC97S1DATA, reg);
- ep93xx_ac97_write_reg(info, AC97IM, AC97_SLOT2RXVALID);
- if (!wait_for_completion_timeout(&info->done, AC97_TIMEOUT)) {
- dev_warn(info->dev, "timeout reading register %x\n", reg);
- mutex_unlock(&info->lock);
- return -ETIMEDOUT;
- }
- val = (unsigned short)ep93xx_ac97_read_reg(info, AC97S2DATA);
-
- mutex_unlock(&info->lock);
- return val;
-}
-
-static void ep93xx_ac97_write(struct snd_ac97 *ac97,
- unsigned short reg,
- unsigned short val)
-{
- struct ep93xx_ac97_info *info = ep93xx_ac97_info;
-
- mutex_lock(&info->lock);
-
- /*
- * Writes to the codec need to be done so that slot 2 is filled in
- * before slot 1.
- */
- ep93xx_ac97_write_reg(info, AC97S2DATA, val);
- ep93xx_ac97_write_reg(info, AC97S1DATA, reg);
-
- ep93xx_ac97_write_reg(info, AC97IM, AC97_SLOT2TXCOMPLETE);
- if (!wait_for_completion_timeout(&info->done, AC97_TIMEOUT))
- dev_warn(info->dev, "timeout writing register %x\n", reg);
-
- mutex_unlock(&info->lock);
-}
-
-static void ep93xx_ac97_warm_reset(struct snd_ac97 *ac97)
-{
- struct ep93xx_ac97_info *info = ep93xx_ac97_info;
-
- mutex_lock(&info->lock);
-
- /*
- * We are assuming that before this functions gets called, the codec
- * BIT_CLK is stopped by forcing the codec into powerdown mode. We can
- * control the SYNC signal directly via AC97SYNC register. Using
- * TIMEDSYNC the controller will keep the SYNC high > 1us.
- */
- ep93xx_ac97_write_reg(info, AC97SYNC, AC97SYNC_TIMEDSYNC);
- ep93xx_ac97_write_reg(info, AC97IM, AC97_CODECREADY);
- if (!wait_for_completion_timeout(&info->done, AC97_TIMEOUT))
- dev_warn(info->dev, "codec warm reset timeout\n");
-
- mutex_unlock(&info->lock);
-}
-
-static void ep93xx_ac97_cold_reset(struct snd_ac97 *ac97)
-{
- struct ep93xx_ac97_info *info = ep93xx_ac97_info;
-
- mutex_lock(&info->lock);
-
- /*
- * For doing cold reset, we disable the AC97 controller interface, clear
- * WINT and CODECREADY bits, and finally enable the interface again.
- */
- ep93xx_ac97_write_reg(info, AC97GCR, 0);
- ep93xx_ac97_write_reg(info, AC97EOI, AC97EOI_CODECREADY | AC97EOI_WINT);
- ep93xx_ac97_write_reg(info, AC97GCR, AC97GCR_AC97IFE);
-
- /*
- * Now, assert the reset and wait for the codec to become ready.
- */
- ep93xx_ac97_write_reg(info, AC97RESET, AC97RESET_TIMEDRESET);
- ep93xx_ac97_write_reg(info, AC97IM, AC97_CODECREADY);
- if (!wait_for_completion_timeout(&info->done, AC97_TIMEOUT))
- dev_warn(info->dev, "codec cold reset timeout\n");
-
- /*
- * Give the codec some time to come fully out from the reset. This way
- * we ensure that the subsequent reads/writes will work.
- */
- usleep_range(15000, 20000);
-
- mutex_unlock(&info->lock);
-}
-
-static irqreturn_t ep93xx_ac97_interrupt(int irq, void *dev_id)
-{
- struct ep93xx_ac97_info *info = dev_id;
- unsigned status, mask;
-
- /*
- * Just mask out the interrupt and wake up the waiting thread.
- * Interrupts are cleared via reading/writing to slot 1 & 2 registers by
- * the waiting thread.
- */
- status = ep93xx_ac97_read_reg(info, AC97GIS);
- mask = ep93xx_ac97_read_reg(info, AC97IM);
- mask &= ~status;
- ep93xx_ac97_write_reg(info, AC97IM, mask);
-
- complete(&info->done);
- return IRQ_HANDLED;
-}
-
-static struct snd_ac97_bus_ops ep93xx_ac97_ops = {
- .read = ep93xx_ac97_read,
- .write = ep93xx_ac97_write,
- .reset = ep93xx_ac97_cold_reset,
- .warm_reset = ep93xx_ac97_warm_reset,
-};
-
-static int ep93xx_ac97_trigger(struct snd_pcm_substream *substream,
- int cmd, struct snd_soc_dai *dai)
-{
- struct ep93xx_ac97_info *info = snd_soc_dai_get_drvdata(dai);
- unsigned v = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- /*
- * Enable compact mode, TX slots 3 & 4, and the TX FIFO
- * itself.
- */
- v |= AC97TXCR_CM;
- v |= AC97TXCR_TX3 | AC97TXCR_TX4;
- v |= AC97TXCR_TEN;
- ep93xx_ac97_write_reg(info, AC97TXCR(1), v);
- } else {
- /*
- * Enable compact mode, RX slots 3 & 4, and the RX FIFO
- * itself.
- */
- v |= AC97RXCR_CM;
- v |= AC97RXCR_RX3 | AC97RXCR_RX4;
- v |= AC97RXCR_REN;
- ep93xx_ac97_write_reg(info, AC97RXCR(1), v);
- }
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- /*
- * As per Cirrus EP93xx errata described below:
- *
- * https://www.cirrus.com/en/pubs/errata/ER667E2B.pdf
- *
- * we will wait for the TX FIFO to be empty before
- * clearing the TEN bit.
- */
- unsigned long timeout = jiffies + AC97_TIMEOUT;
-
- do {
- v = ep93xx_ac97_read_reg(info, AC97SR(1));
- if (time_after(jiffies, timeout)) {
- dev_warn(info->dev, "TX timeout\n");
- break;
- }
- } while (!(v & (AC97SR_TXFE | AC97SR_TXUE)));
-
- /* disable the TX FIFO */
- ep93xx_ac97_write_reg(info, AC97TXCR(1), 0);
- } else {
- /* disable the RX FIFO */
- ep93xx_ac97_write_reg(info, AC97RXCR(1), 0);
- }
- break;
-
- default:
- dev_warn(info->dev, "unknown command %d\n", cmd);
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int ep93xx_ac97_dai_probe(struct snd_soc_dai *dai)
-{
- struct ep93xx_ac97_info *info = snd_soc_dai_get_drvdata(dai);
-
- info->dma_params_tx.filter_data = &ep93xx_ac97_pcm_out;
- info->dma_params_rx.filter_data = &ep93xx_ac97_pcm_in;
-
- dai->playback_dma_data = &info->dma_params_tx;
- dai->capture_dma_data = &info->dma_params_rx;
-
- return 0;
-}
-
-static const struct snd_soc_dai_ops ep93xx_ac97_dai_ops = {
- .trigger = ep93xx_ac97_trigger,
-};
-
-static struct snd_soc_dai_driver ep93xx_ac97_dai = {
- .name = "ep93xx-ac97",
- .id = 0,
- .probe = ep93xx_ac97_dai_probe,
- .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,
- },
- .ops = &ep93xx_ac97_dai_ops,
-};
-
-static const struct snd_soc_component_driver ep93xx_ac97_component = {
- .name = "ep93xx-ac97",
- .legacy_dai_naming = 1,
-};
-
-static int ep93xx_ac97_probe(struct platform_device *pdev)
-{
- struct ep93xx_ac97_info *info;
- int irq;
- int ret;
-
- info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
- if (!info)
- return -ENOMEM;
-
- info->regs = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(info->regs))
- return PTR_ERR(info->regs);
-
- irq = platform_get_irq(pdev, 0);
- if (irq <= 0)
- return irq < 0 ? irq : -ENODEV;
-
- ret = devm_request_irq(&pdev->dev, irq, ep93xx_ac97_interrupt,
- IRQF_TRIGGER_HIGH, pdev->name, info);
- if (ret)
- goto fail;
-
- dev_set_drvdata(&pdev->dev, info);
-
- mutex_init(&info->lock);
- init_completion(&info->done);
- info->dev = &pdev->dev;
-
- ep93xx_ac97_info = info;
- platform_set_drvdata(pdev, info);
-
- ret = snd_soc_set_ac97_ops(&ep93xx_ac97_ops);
- if (ret)
- goto fail;
-
- ret = snd_soc_register_component(&pdev->dev, &ep93xx_ac97_component,
- &ep93xx_ac97_dai, 1);
- if (ret)
- goto fail;
-
- ret = devm_ep93xx_pcm_platform_register(&pdev->dev);
- if (ret)
- goto fail_unregister;
-
- return 0;
-
-fail_unregister:
- snd_soc_unregister_component(&pdev->dev);
-fail:
- ep93xx_ac97_info = NULL;
- snd_soc_set_ac97_ops(NULL);
- return ret;
-}
-
-static int ep93xx_ac97_remove(struct platform_device *pdev)
-{
- struct ep93xx_ac97_info *info = platform_get_drvdata(pdev);
-
- snd_soc_unregister_component(&pdev->dev);
-
- /* disable the AC97 controller */
- ep93xx_ac97_write_reg(info, AC97GCR, 0);
-
- ep93xx_ac97_info = NULL;
-
- snd_soc_set_ac97_ops(NULL);
-
- return 0;
-}
-
-static struct platform_driver ep93xx_ac97_driver = {
- .probe = ep93xx_ac97_probe,
- .remove = ep93xx_ac97_remove,
- .driver = {
- .name = "ep93xx-ac97",
- },
-};
-
-module_platform_driver(ep93xx_ac97_driver);
-
-MODULE_DESCRIPTION("EP93xx AC97 ASoC Driver");
-MODULE_AUTHOR("Mika Westerberg <mika.westerberg@iki.fi>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ep93xx-ac97");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
- *
- * Copyright (C) 2008 Bluewater Systems Ltd
- * Author: Ryan Mallon
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/soc/cirrus/ep93xx.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/soc.h>
-
-#include <asm/mach-types.h>
-
-#include "../codecs/tlv320aic23.h"
-
-#define CODEC_CLOCK 5644800
-
-static int snappercl15_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
- struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
- struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
- int err;
-
- err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK,
- SND_SOC_CLOCK_IN);
- if (err)
- return err;
-
- err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK,
- SND_SOC_CLOCK_OUT);
- if (err)
- return err;
-
- return 0;
-}
-
-static const struct snd_soc_ops snappercl15_ops = {
- .hw_params = snappercl15_hw_params,
-};
-
-static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
- SND_SOC_DAPM_HP("Headphone Jack", NULL),
- SND_SOC_DAPM_LINE("Line In", NULL),
- SND_SOC_DAPM_MIC("Mic Jack", NULL),
-};
-
-static const struct snd_soc_dapm_route audio_map[] = {
- {"Headphone Jack", NULL, "LHPOUT"},
- {"Headphone Jack", NULL, "RHPOUT"},
-
- {"LLINEIN", NULL, "Line In"},
- {"RLINEIN", NULL, "Line In"},
-
- {"MICIN", NULL, "Mic Jack"},
-};
-
-SND_SOC_DAILINK_DEFS(aic23,
- DAILINK_COMP_ARRAY(COMP_CPU("ep93xx-i2s")),
- DAILINK_COMP_ARRAY(COMP_CODEC("tlv320aic23-codec.0-001a",
- "tlv320aic23-hifi")),
- DAILINK_COMP_ARRAY(COMP_PLATFORM("ep93xx-i2s")));
-
-static struct snd_soc_dai_link snappercl15_dai = {
- .name = "tlv320aic23",
- .stream_name = "AIC23",
- .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBC_CFC,
- .ops = &snappercl15_ops,
- SND_SOC_DAILINK_REG(aic23),
-};
-
-static struct snd_soc_card snd_soc_snappercl15 = {
- .name = "Snapper CL15",
- .owner = THIS_MODULE,
- .dai_link = &snappercl15_dai,
- .num_links = 1,
-
- .dapm_widgets = tlv320aic23_dapm_widgets,
- .num_dapm_widgets = ARRAY_SIZE(tlv320aic23_dapm_widgets),
- .dapm_routes = audio_map,
- .num_dapm_routes = ARRAY_SIZE(audio_map),
-};
-
-static int snappercl15_probe(struct platform_device *pdev)
-{
- struct snd_soc_card *card = &snd_soc_snappercl15;
- int ret;
-
- ret = ep93xx_i2s_acquire();
- if (ret)
- return ret;
-
- card->dev = &pdev->dev;
-
- ret = snd_soc_register_card(card);
- if (ret) {
- dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
- ret);
- ep93xx_i2s_release();
- }
-
- return ret;
-}
-
-static int snappercl15_remove(struct platform_device *pdev)
-{
- struct snd_soc_card *card = platform_get_drvdata(pdev);
-
- snd_soc_unregister_card(card);
- ep93xx_i2s_release();
-
- return 0;
-}
-
-static struct platform_driver snappercl15_driver = {
- .driver = {
- .name = "snappercl15-audio",
- },
- .probe = snappercl15_probe,
- .remove = snappercl15_remove,
-};
-
-module_platform_driver(snappercl15_driver);
-
-MODULE_AUTHOR("Ryan Mallon");
-MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:snappercl15-audio");
projects / platform / kernel / linux-rpi.git / commitdiff