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ASoC: Alchemy AC97C/I2SC audio support
This patch adds ASoC support for the AC97 and I2S controllers on the old Au1000/Au1500/Au1100 chips, AC97 Tested on a Db1500. I2S untested since none of the boards actually have an I2S codec wired up (just test pins). Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com> Acked-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Manuel Lauss
Mark Brown
parent
ee47b36486
commit
b3c70c9ea6
@ -18,6 +18,25 @@ config SND_SOC_AU1XPSC_AC97
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select SND_AC97_CODEC
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select SND_SOC_AC97_BUS
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##
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## Au1000/1500/1100 DMA + AC97C/I2SC
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##
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config SND_SOC_AU1XAUDIO
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tristate "SoC Audio for Au1000/Au1500/Au1100"
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depends on MIPS_ALCHEMY
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help
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This is a driver set for the AC97 unit and the
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old DMA controller as found on the Au1000/Au1500/Au1100 chips.
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config SND_SOC_AU1XAC97C
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tristate
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select AC97_BUS
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select SND_AC97_CODEC
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select SND_SOC_AC97_BUS
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config SND_SOC_AU1XI2SC
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tristate
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##
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## Boards
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@ -3,9 +3,17 @@ snd-soc-au1xpsc-dbdma-objs := dbdma2.o
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snd-soc-au1xpsc-i2s-objs := psc-i2s.o
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snd-soc-au1xpsc-ac97-objs := psc-ac97.o
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# Au1000/1500/1100 Audio units
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snd-soc-au1x-dma-objs := dma.o
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snd-soc-au1x-ac97c-objs := ac97c.o
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snd-soc-au1x-i2sc-objs := i2sc.o
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obj-$(CONFIG_SND_SOC_AU1XPSC) += snd-soc-au1xpsc-dbdma.o
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obj-$(CONFIG_SND_SOC_AU1XPSC_I2S) += snd-soc-au1xpsc-i2s.o
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obj-$(CONFIG_SND_SOC_AU1XPSC_AC97) += snd-soc-au1xpsc-ac97.o
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obj-$(CONFIG_SND_SOC_AU1XAUDIO) += snd-soc-au1x-dma.o
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obj-$(CONFIG_SND_SOC_AU1XAC97C) += snd-soc-au1x-ac97c.o
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obj-$(CONFIG_SND_SOC_AU1XI2SC) += snd-soc-au1x-i2sc.o
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# Boards
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snd-soc-db1200-objs := db1200.o
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365
sound/soc/au1x/ac97c.c
Normal file
365
sound/soc/au1x/ac97c.c
Normal file
@ -0,0 +1,365 @@
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/*
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* Au1000/Au1500/Au1100 AC97C controller driver for ASoC
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*
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* (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
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*
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* based on the old ALSA driver originally written by
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* Charles Eidsness <charles@cooper-street.com>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/suspend.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <asm/mach-au1x00/au1000.h>
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#include "psc.h"
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/* register offsets and bits */
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#define AC97_CONFIG 0x00
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#define AC97_STATUS 0x04
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#define AC97_DATA 0x08
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#define AC97_CMDRESP 0x0c
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#define AC97_ENABLE 0x10
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#define CFG_RC(x) (((x) & 0x3ff) << 13) /* valid rx slots mask */
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#define CFG_XS(x) (((x) & 0x3ff) << 3) /* valid tx slots mask */
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#define CFG_SG (1 << 2) /* sync gate */
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#define CFG_SN (1 << 1) /* sync control */
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#define CFG_RS (1 << 0) /* acrst# control */
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#define STAT_XU (1 << 11) /* tx underflow */
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#define STAT_XO (1 << 10) /* tx overflow */
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#define STAT_RU (1 << 9) /* rx underflow */
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#define STAT_RO (1 << 8) /* rx overflow */
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#define STAT_RD (1 << 7) /* codec ready */
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#define STAT_CP (1 << 6) /* command pending */
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#define STAT_TE (1 << 4) /* tx fifo empty */
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#define STAT_TF (1 << 3) /* tx fifo full */
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#define STAT_RE (1 << 1) /* rx fifo empty */
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#define STAT_RF (1 << 0) /* rx fifo full */
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#define CMD_SET_DATA(x) (((x) & 0xffff) << 16)
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#define CMD_GET_DATA(x) ((x) & 0xffff)
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#define CMD_READ (1 << 7)
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#define CMD_WRITE (0 << 7)
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#define CMD_IDX(x) ((x) & 0x7f)
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#define EN_D (1 << 1) /* DISable bit */
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#define EN_CE (1 << 0) /* clock enable bit */
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/* how often to retry failed codec register reads/writes */
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#define AC97_RW_RETRIES 5
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#define AC97_RATES \
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SNDRV_PCM_RATE_CONTINUOUS
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#define AC97_FMTS \
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(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE)
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/* instance data. There can be only one, MacLeod!!!!, fortunately there IS only
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* once AC97C on early Alchemy chips. The newer ones aren't so lucky.
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*/
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static struct au1xpsc_audio_data *ac97c_workdata;
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#define ac97_to_ctx(x) ac97c_workdata
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static inline unsigned long RD(struct au1xpsc_audio_data *ctx, int reg)
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{
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return __raw_readl(ctx->mmio + reg);
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}
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static inline void WR(struct au1xpsc_audio_data *ctx, int reg, unsigned long v)
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{
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__raw_writel(v, ctx->mmio + reg);
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wmb();
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}
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static unsigned short au1xac97c_ac97_read(struct snd_ac97 *ac97,
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unsigned short r)
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{
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struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
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unsigned int tmo, retry;
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unsigned long data;
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data = ~0;
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retry = AC97_RW_RETRIES;
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do {
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mutex_lock(&ctx->lock);
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tmo = 5;
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while ((RD(ctx, AC97_STATUS) & STAT_CP) && tmo--)
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udelay(21); /* wait an ac97 frame time */
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if (!tmo) {
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pr_debug("ac97rd timeout #1\n");
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goto next;
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}
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WR(ctx, AC97_CMDRESP, CMD_IDX(r) | CMD_READ);
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/* stupid errata: data is only valid for 21us, so
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* poll, Forrest, poll...
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*/
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tmo = 0x10000;
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while ((RD(ctx, AC97_STATUS) & STAT_CP) && tmo--)
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asm volatile ("nop");
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data = RD(ctx, AC97_CMDRESP);
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if (!tmo)
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pr_debug("ac97rd timeout #2\n");
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next:
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mutex_unlock(&ctx->lock);
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} while (--retry && !tmo);
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pr_debug("AC97RD %04x %04lx %d\n", r, data, retry);
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return retry ? data & 0xffff : 0xffff;
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}
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static void au1xac97c_ac97_write(struct snd_ac97 *ac97, unsigned short r,
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unsigned short v)
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{
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struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
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unsigned int tmo, retry;
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retry = AC97_RW_RETRIES;
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do {
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mutex_lock(&ctx->lock);
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for (tmo = 5; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)
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udelay(21);
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if (!tmo) {
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pr_debug("ac97wr timeout #1\n");
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goto next;
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}
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WR(ctx, AC97_CMDRESP, CMD_WRITE | CMD_IDX(r) | CMD_SET_DATA(v));
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for (tmo = 10; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)
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udelay(21);
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if (!tmo)
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pr_debug("ac97wr timeout #2\n");
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next:
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mutex_unlock(&ctx->lock);
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} while (--retry && !tmo);
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pr_debug("AC97WR %04x %04x %d\n", r, v, retry);
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}
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static void au1xac97c_ac97_warm_reset(struct snd_ac97 *ac97)
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{
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struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
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WR(ctx, AC97_CONFIG, ctx->cfg | CFG_SG | CFG_SN);
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msleep(20);
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WR(ctx, AC97_CONFIG, ctx->cfg | CFG_SG);
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WR(ctx, AC97_CONFIG, ctx->cfg);
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}
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static void au1xac97c_ac97_cold_reset(struct snd_ac97 *ac97)
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{
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struct au1xpsc_audio_data *ctx = ac97_to_ctx(ac97);
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int i;
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WR(ctx, AC97_CONFIG, ctx->cfg | CFG_RS);
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msleep(500);
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WR(ctx, AC97_CONFIG, ctx->cfg);
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/* wait for codec ready */
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i = 50;
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while (((RD(ctx, AC97_STATUS) & STAT_RD) == 0) && --i)
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msleep(20);
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if (!i)
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printk(KERN_ERR "ac97c: codec not ready after cold reset\n");
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}
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/* AC97 controller operations */
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struct snd_ac97_bus_ops soc_ac97_ops = {
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.read = au1xac97c_ac97_read,
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.write = au1xac97c_ac97_write,
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.reset = au1xac97c_ac97_cold_reset,
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.warm_reset = au1xac97c_ac97_warm_reset,
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};
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EXPORT_SYMBOL_GPL(soc_ac97_ops); /* globals be gone! */
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static int alchemy_ac97c_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
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snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);
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return 0;
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}
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static struct snd_soc_dai_ops alchemy_ac97c_ops = {
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.startup = alchemy_ac97c_startup,
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};
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static int au1xac97c_dai_probe(struct snd_soc_dai *dai)
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{
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return ac97c_workdata ? 0 : -ENODEV;
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}
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static struct snd_soc_dai_driver au1xac97c_dai_driver = {
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.name = "alchemy-ac97c",
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.ac97_control = 1,
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.probe = au1xac97c_dai_probe,
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.playback = {
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.rates = AC97_RATES,
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.formats = AC97_FMTS,
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.channels_min = 2,
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.channels_max = 2,
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},
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.capture = {
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.rates = AC97_RATES,
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.formats = AC97_FMTS,
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.channels_min = 2,
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.channels_max = 2,
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},
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.ops = &alchemy_ac97c_ops,
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};
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static int __devinit au1xac97c_drvprobe(struct platform_device *pdev)
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{
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int ret;
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struct resource *r;
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struct au1xpsc_audio_data *ctx;
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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mutex_init(&ctx->lock);
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r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!r) {
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ret = -ENODEV;
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goto out0;
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}
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ret = -EBUSY;
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if (!request_mem_region(r->start, resource_size(r), pdev->name))
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goto out0;
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ctx->mmio = ioremap_nocache(r->start, resource_size(r));
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if (!ctx->mmio)
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goto out1;
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r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!r)
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goto out1;
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ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = r->start;
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r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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if (!r)
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goto out1;
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ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = r->start;
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/* switch it on */
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WR(ctx, AC97_ENABLE, EN_D | EN_CE);
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WR(ctx, AC97_ENABLE, EN_CE);
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ctx->cfg = CFG_RC(3) | CFG_XS(3);
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WR(ctx, AC97_CONFIG, ctx->cfg);
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platform_set_drvdata(pdev, ctx);
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ret = snd_soc_register_dai(&pdev->dev, &au1xac97c_dai_driver);
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if (ret)
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goto out1;
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ac97c_workdata = ctx;
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return 0;
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snd_soc_unregister_dai(&pdev->dev);
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out1:
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release_mem_region(r->start, resource_size(r));
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out0:
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kfree(ctx);
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return ret;
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}
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static int __devexit au1xac97c_drvremove(struct platform_device *pdev)
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{
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struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
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struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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snd_soc_unregister_dai(&pdev->dev);
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WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
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iounmap(ctx->mmio);
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release_mem_region(r->start, resource_size(r));
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kfree(ctx);
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ac97c_workdata = NULL; /* MDEV */
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return 0;
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}
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#ifdef CONFIG_PM
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static int au1xac97c_drvsuspend(struct device *dev)
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{
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struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);
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WR(ctx, AC97_ENABLE, EN_D); /* clock off, disable */
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return 0;
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}
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static int au1xac97c_drvresume(struct device *dev)
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{
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struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);
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WR(ctx, AC97_ENABLE, EN_D | EN_CE);
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WR(ctx, AC97_ENABLE, EN_CE);
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WR(ctx, AC97_CONFIG, ctx->cfg);
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return 0;
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}
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static const struct dev_pm_ops au1xpscac97_pmops = {
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.suspend = au1xac97c_drvsuspend,
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.resume = au1xac97c_drvresume,
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};
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#define AU1XPSCAC97_PMOPS (&au1xpscac97_pmops)
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#else
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#define AU1XPSCAC97_PMOPS NULL
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#endif
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static struct platform_driver au1xac97c_driver = {
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.driver = {
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.name = "alchemy-ac97c",
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.owner = THIS_MODULE,
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.pm = AU1XPSCAC97_PMOPS,
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},
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.probe = au1xac97c_drvprobe,
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.remove = __devexit_p(au1xac97c_drvremove),
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};
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static int __init au1xac97c_load(void)
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{
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ac97c_workdata = NULL;
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return platform_driver_register(&au1xac97c_driver);
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}
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static void __exit au1xac97c_unload(void)
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{
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platform_driver_unregister(&au1xac97c_driver);
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}
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module_init(au1xac97c_load);
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module_exit(au1xac97c_unload);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Au1000/1500/1100 AC97C ASoC driver");
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MODULE_AUTHOR("Manuel Lauss");
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377
sound/soc/au1x/dma.c
Normal file
377
sound/soc/au1x/dma.c
Normal file
@ -0,0 +1,377 @@
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/*
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* Au1000/Au1500/Au1100 Audio DMA support.
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*
|
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* (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
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*
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* copied almost verbatim from the old ALSA driver, written by
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* Charles Eidsness <charles@cooper-street.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/dma-mapping.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/au1000_dma.h>
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#include "psc.h"
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#define ALCHEMY_PCM_FMTS \
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(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \
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SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
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SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE | \
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SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE | \
|
||||
SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE | \
|
||||
0)
|
||||
|
||||
struct pcm_period {
|
||||
u32 start;
|
||||
u32 relative_end; /* relative to start of buffer */
|
||||
struct pcm_period *next;
|
||||
};
|
||||
|
||||
struct audio_stream {
|
||||
struct snd_pcm_substream *substream;
|
||||
int dma;
|
||||
struct pcm_period *buffer;
|
||||
unsigned int period_size;
|
||||
unsigned int periods;
|
||||
};
|
||||
|
||||
struct alchemy_pcm_ctx {
|
||||
struct audio_stream stream[2]; /* playback & capture */
|
||||
};
|
||||
|
||||
static void au1000_release_dma_link(struct audio_stream *stream)
|
||||
{
|
||||
struct pcm_period *pointer;
|
||||
struct pcm_period *pointer_next;
|
||||
|
||||
stream->period_size = 0;
|
||||
stream->periods = 0;
|
||||
pointer = stream->buffer;
|
||||
if (!pointer)
|
||||
return;
|
||||
do {
|
||||
pointer_next = pointer->next;
|
||||
kfree(pointer);
|
||||
pointer = pointer_next;
|
||||
} while (pointer != stream->buffer);
|
||||
stream->buffer = NULL;
|
||||
}
|
||||
|
||||
static int au1000_setup_dma_link(struct audio_stream *stream,
|
||||
unsigned int period_bytes,
|
||||
unsigned int periods)
|
||||
{
|
||||
struct snd_pcm_substream *substream = stream->substream;
|
||||
struct snd_pcm_runtime *runtime = substream->runtime;
|
||||
struct pcm_period *pointer;
|
||||
unsigned long dma_start;
|
||||
int i;
|
||||
|
||||
dma_start = virt_to_phys(runtime->dma_area);
|
||||
|
||||
if (stream->period_size == period_bytes &&
|
||||
stream->periods == periods)
|
||||
return 0; /* not changed */
|
||||
|
||||
au1000_release_dma_link(stream);
|
||||
|
||||
stream->period_size = period_bytes;
|
||||
stream->periods = periods;
|
||||
|
||||
stream->buffer = kmalloc(sizeof(struct pcm_period), GFP_KERNEL);
|
||||
if (!stream->buffer)
|
||||
return -ENOMEM;
|
||||
pointer = stream->buffer;
|
||||
for (i = 0; i < periods; i++) {
|
||||
pointer->start = (u32)(dma_start + (i * period_bytes));
|
||||
pointer->relative_end = (u32) (((i+1) * period_bytes) - 0x1);
|
||||
if (i < periods - 1) {
|
||||
pointer->next = kmalloc(sizeof(struct pcm_period),
|
||||
GFP_KERNEL);
|
||||
if (!pointer->next) {
|
||||
au1000_release_dma_link(stream);
|
||||
return -ENOMEM;
|
||||
}
|
||||
pointer = pointer->next;
|
||||
}
|
||||
}
|
||||
pointer->next = stream->buffer;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void au1000_dma_stop(struct audio_stream *stream)
|
||||
{
|
||||
if (stream->buffer)
|
||||
disable_dma(stream->dma);
|
||||
}
|
||||
|
||||
static void au1000_dma_start(struct audio_stream *stream)
|
||||
{
|
||||
if (!stream->buffer)
|
||||
return;
|
||||
|
||||
init_dma(stream->dma);
|
||||
if (get_dma_active_buffer(stream->dma) == 0) {
|
||||
clear_dma_done0(stream->dma);
|
||||
set_dma_addr0(stream->dma, stream->buffer->start);
|
||||
set_dma_count0(stream->dma, stream->period_size >> 1);
|
||||
set_dma_addr1(stream->dma, stream->buffer->next->start);
|
||||
set_dma_count1(stream->dma, stream->period_size >> 1);
|
||||
} else {
|
||||
clear_dma_done1(stream->dma);
|
||||
set_dma_addr1(stream->dma, stream->buffer->start);
|
||||
set_dma_count1(stream->dma, stream->period_size >> 1);
|
||||
set_dma_addr0(stream->dma, stream->buffer->next->start);
|
||||
set_dma_count0(stream->dma, stream->period_size >> 1);
|
||||
}
|
||||
enable_dma_buffers(stream->dma);
|
||||
start_dma(stream->dma);
|
||||
}
|
||||
|
||||
static irqreturn_t au1000_dma_interrupt(int irq, void *ptr)
|
||||
{
|
||||
struct audio_stream *stream = (struct audio_stream *)ptr;
|
||||
struct snd_pcm_substream *substream = stream->substream;
|
||||
|
||||
switch (get_dma_buffer_done(stream->dma)) {
|
||||
case DMA_D0:
|
||||
stream->buffer = stream->buffer->next;
|
||||
clear_dma_done0(stream->dma);
|
||||
set_dma_addr0(stream->dma, stream->buffer->next->start);
|
||||
set_dma_count0(stream->dma, stream->period_size >> 1);
|
||||
enable_dma_buffer0(stream->dma);
|
||||
break;
|
||||
case DMA_D1:
|
||||
stream->buffer = stream->buffer->next;
|
||||
clear_dma_done1(stream->dma);
|
||||
set_dma_addr1(stream->dma, stream->buffer->next->start);
|
||||
set_dma_count1(stream->dma, stream->period_size >> 1);
|
||||
enable_dma_buffer1(stream->dma);
|
||||
break;
|
||||
case (DMA_D0 | DMA_D1):
|
||||
pr_debug("DMA %d missed interrupt.\n", stream->dma);
|
||||
au1000_dma_stop(stream);
|
||||
au1000_dma_start(stream);
|
||||
break;
|
||||
case (~DMA_D0 & ~DMA_D1):
|
||||
pr_debug("DMA %d empty irq.\n", stream->dma);
|
||||
}
|
||||
snd_pcm_period_elapsed(substream);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static const struct snd_pcm_hardware alchemy_pcm_hardware = {
|
||||
.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
|
||||
SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BATCH,
|
||||
.formats = ALCHEMY_PCM_FMTS,
|
||||
.rates = SNDRV_PCM_RATE_8000_192000,
|
||||
.rate_min = SNDRV_PCM_RATE_8000,
|
||||
.rate_max = SNDRV_PCM_RATE_192000,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
.period_bytes_min = 1024,
|
||||
.period_bytes_max = 16 * 1024 - 1,
|
||||
.periods_min = 4,
|
||||
.periods_max = 255,
|
||||
.buffer_bytes_max = 128 * 1024,
|
||||
.fifo_size = 16,
|
||||
};
|
||||
|
||||
static inline struct alchemy_pcm_ctx *ss_to_ctx(struct snd_pcm_substream *ss)
|
||||
{
|
||||
struct snd_soc_pcm_runtime *rtd = ss->private_data;
|
||||
return snd_soc_platform_get_drvdata(rtd->platform);
|
||||
}
|
||||
|
||||
static inline struct audio_stream *ss_to_as(struct snd_pcm_substream *ss)
|
||||
{
|
||||
struct alchemy_pcm_ctx *ctx = ss_to_ctx(ss);
|
||||
return &(ctx->stream[ss->stream]);
|
||||
}
|
||||
|
||||
static int alchemy_pcm_open(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct alchemy_pcm_ctx *ctx = ss_to_ctx(substream);
|
||||
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||||
int *dmaids, s = substream->stream;
|
||||
char *name;
|
||||
|
||||
dmaids = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
|
||||
if (!dmaids)
|
||||
return -ENODEV; /* whoa, has ordering changed? */
|
||||
|
||||
/* DMA setup */
|
||||
name = (s == SNDRV_PCM_STREAM_PLAYBACK) ? "audio-tx" : "audio-rx";
|
||||
ctx->stream[s].dma = request_au1000_dma(dmaids[s], name,
|
||||
au1000_dma_interrupt, IRQF_DISABLED,
|
||||
&ctx->stream[s]);
|
||||
set_dma_mode(ctx->stream[s].dma,
|
||||
get_dma_mode(ctx->stream[s].dma) & ~DMA_NC);
|
||||
|
||||
ctx->stream[s].substream = substream;
|
||||
ctx->stream[s].buffer = NULL;
|
||||
snd_soc_set_runtime_hwparams(substream, &alchemy_pcm_hardware);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int alchemy_pcm_close(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct alchemy_pcm_ctx *ctx = ss_to_ctx(substream);
|
||||
int stype = substream->stream;
|
||||
|
||||
ctx->stream[stype].substream = NULL;
|
||||
free_au1000_dma(ctx->stream[stype].dma);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int alchemy_pcm_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *hw_params)
|
||||
{
|
||||
struct audio_stream *stream = ss_to_as(substream);
|
||||
int err;
|
||||
|
||||
err = snd_pcm_lib_malloc_pages(substream,
|
||||
params_buffer_bytes(hw_params));
|
||||
if (err < 0)
|
||||
return err;
|
||||
err = au1000_setup_dma_link(stream,
|
||||
params_period_bytes(hw_params),
|
||||
params_periods(hw_params));
|
||||
if (err)
|
||||
snd_pcm_lib_free_pages(substream);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int alchemy_pcm_hw_free(struct snd_pcm_substream *substream)
|
||||
{
|
||||
struct audio_stream *stream = ss_to_as(substream);
|
||||
au1000_release_dma_link(stream);
|
||||
return snd_pcm_lib_free_pages(substream);
|
||||
}
|
||||
|
||||
static int alchemy_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
||||
{
|
||||
struct audio_stream *stream = ss_to_as(substream);
|
||||
int err = 0;
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
au1000_dma_start(stream);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
au1000_dma_stop(stream);
|
||||
break;
|
||||
default:
|
||||
err = -EINVAL;
|
||||
break;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
||||
static snd_pcm_uframes_t alchemy_pcm_pointer(struct snd_pcm_substream *ss)
|
||||
{
|
||||
struct audio_stream *stream = ss_to_as(ss);
|
||||
long location;
|
||||
|
||||
location = get_dma_residue(stream->dma);
|
||||
location = stream->buffer->relative_end - location;
|
||||
if (location == -1)
|
||||
location = 0;
|
||||
return bytes_to_frames(ss->runtime, location);
|
||||
}
|
||||
|
||||
static struct snd_pcm_ops alchemy_pcm_ops = {
|
||||
.open = alchemy_pcm_open,
|
||||
.close = alchemy_pcm_close,
|
||||
.ioctl = snd_pcm_lib_ioctl,
|
||||
.hw_params = alchemy_pcm_hw_params,
|
||||
.hw_free = alchemy_pcm_hw_free,
|
||||
.trigger = alchemy_pcm_trigger,
|
||||
.pointer = alchemy_pcm_pointer,
|
||||
};
|
||||
|
||||
static void alchemy_pcm_free_dma_buffers(struct snd_pcm *pcm)
|
||||
{
|
||||
snd_pcm_lib_preallocate_free_for_all(pcm);
|
||||
}
|
||||
|
||||
static int alchemy_pcm_new(struct snd_soc_pcm_runtime *rtd)
|
||||
{
|
||||
struct snd_pcm *pcm = rtd->pcm;
|
||||
|
||||
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
|
||||
snd_dma_continuous_data(GFP_KERNEL), 65536, (4096 * 1024) - 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct snd_soc_platform_driver alchemy_pcm_soc_platform = {
|
||||
.ops = &alchemy_pcm_ops,
|
||||
.pcm_new = alchemy_pcm_new,
|
||||
.pcm_free = alchemy_pcm_free_dma_buffers,
|
||||
};
|
||||
|
||||
static int __devinit alchemy_pcm_drvprobe(struct platform_device *pdev)
|
||||
{
|
||||
struct alchemy_pcm_ctx *ctx;
|
||||
int ret;
|
||||
|
||||
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
||||
if (!ctx)
|
||||
return -ENOMEM;
|
||||
|
||||
platform_set_drvdata(pdev, ctx);
|
||||
|
||||
ret = snd_soc_register_platform(&pdev->dev, &alchemy_pcm_soc_platform);
|
||||
if (ret)
|
||||
kfree(ctx);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit alchemy_pcm_drvremove(struct platform_device *pdev)
|
||||
{
|
||||
struct alchemy_pcm_ctx *ctx = platform_get_drvdata(pdev);
|
||||
|
||||
snd_soc_unregister_platform(&pdev->dev);
|
||||
kfree(ctx);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver alchemy_pcmdma_driver = {
|
||||
.driver = {
|
||||
.name = "alchemy-pcm-dma",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = alchemy_pcm_drvprobe,
|
||||
.remove = __devexit_p(alchemy_pcm_drvremove),
|
||||
};
|
||||
|
||||
static int __init alchemy_pcmdma_load(void)
|
||||
{
|
||||
return platform_driver_register(&alchemy_pcmdma_driver);
|
||||
}
|
||||
|
||||
static void __exit alchemy_pcmdma_unload(void)
|
||||
{
|
||||
platform_driver_unregister(&alchemy_pcmdma_driver);
|
||||
}
|
||||
|
||||
module_init(alchemy_pcmdma_load);
|
||||
module_exit(alchemy_pcmdma_unload);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Au1000/Au1500/Au1100 Audio DMA driver");
|
||||
MODULE_AUTHOR("Manuel Lauss");
|
||||
347
sound/soc/au1x/i2sc.c
Normal file
347
sound/soc/au1x/i2sc.c
Normal file
@ -0,0 +1,347 @@
|
||||
/*
|
||||
* Au1000/Au1500/Au1100 I2S controller driver for ASoC
|
||||
*
|
||||
* (c) 2011 Manuel Lauss <manuel.lauss@googlemail.com>
|
||||
*
|
||||
* Note: clock supplied to the I2S controller must be 256x samplerate.
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <sound/core.h>
|
||||
#include <sound/pcm.h>
|
||||
#include <sound/initval.h>
|
||||
#include <sound/soc.h>
|
||||
#include <asm/mach-au1x00/au1000.h>
|
||||
|
||||
#include "psc.h"
|
||||
|
||||
#define I2S_RXTX 0x00
|
||||
#define I2S_CFG 0x04
|
||||
#define I2S_ENABLE 0x08
|
||||
|
||||
#define CFG_XU (1 << 25) /* tx underflow */
|
||||
#define CFG_XO (1 << 24)
|
||||
#define CFG_RU (1 << 23)
|
||||
#define CFG_RO (1 << 22)
|
||||
#define CFG_TR (1 << 21)
|
||||
#define CFG_TE (1 << 20)
|
||||
#define CFG_TF (1 << 19)
|
||||
#define CFG_RR (1 << 18)
|
||||
#define CFG_RF (1 << 17)
|
||||
#define CFG_ICK (1 << 12) /* clock invert */
|
||||
#define CFG_PD (1 << 11) /* set to make I2SDIO INPUT */
|
||||
#define CFG_LB (1 << 10) /* loopback */
|
||||
#define CFG_IC (1 << 9) /* word select invert */
|
||||
#define CFG_FM_I2S (0 << 7) /* I2S format */
|
||||
#define CFG_FM_LJ (1 << 7) /* left-justified */
|
||||
#define CFG_FM_RJ (2 << 7) /* right-justified */
|
||||
#define CFG_FM_MASK (3 << 7)
|
||||
#define CFG_TN (1 << 6) /* tx fifo en */
|
||||
#define CFG_RN (1 << 5) /* rx fifo en */
|
||||
#define CFG_SZ_8 (0x08)
|
||||
#define CFG_SZ_16 (0x10)
|
||||
#define CFG_SZ_18 (0x12)
|
||||
#define CFG_SZ_20 (0x14)
|
||||
#define CFG_SZ_24 (0x18)
|
||||
#define CFG_SZ_MASK (0x1f)
|
||||
#define EN_D (1 << 1) /* DISable */
|
||||
#define EN_CE (1 << 0) /* clock enable */
|
||||
|
||||
/* only limited by clock generator and board design */
|
||||
#define AU1XI2SC_RATES \
|
||||
SNDRV_PCM_RATE_CONTINUOUS
|
||||
|
||||
#define AU1XI2SC_FMTS \
|
||||
(SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 | \
|
||||
SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \
|
||||
SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE | \
|
||||
SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_U18_3LE | \
|
||||
SNDRV_PCM_FMTBIT_S18_3BE | SNDRV_PCM_FMTBIT_U18_3BE | \
|
||||
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_U20_3LE | \
|
||||
SNDRV_PCM_FMTBIT_S20_3BE | SNDRV_PCM_FMTBIT_U20_3BE | \
|
||||
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | \
|
||||
SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE | \
|
||||
0)
|
||||
|
||||
static inline unsigned long RD(struct au1xpsc_audio_data *ctx, int reg)
|
||||
{
|
||||
return __raw_readl(ctx->mmio + reg);
|
||||
}
|
||||
|
||||
static inline void WR(struct au1xpsc_audio_data *ctx, int reg, unsigned long v)
|
||||
{
|
||||
__raw_writel(v, ctx->mmio + reg);
|
||||
wmb();
|
||||
}
|
||||
|
||||
static int au1xi2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
|
||||
{
|
||||
struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(cpu_dai);
|
||||
unsigned long c;
|
||||
int ret;
|
||||
|
||||
ret = -EINVAL;
|
||||
c = ctx->cfg;
|
||||
|
||||
c &= ~CFG_FM_MASK;
|
||||
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
||||
case SND_SOC_DAIFMT_I2S:
|
||||
c |= CFG_FM_I2S;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_MSB:
|
||||
c |= CFG_FM_RJ;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_LSB:
|
||||
c |= CFG_FM_LJ;
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
c &= ~(CFG_IC | CFG_ICK); /* IB-IF */
|
||||
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
|
||||
case SND_SOC_DAIFMT_NB_NF:
|
||||
c |= CFG_IC | CFG_ICK;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_NB_IF:
|
||||
c |= CFG_IC;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_IB_NF:
|
||||
c |= CFG_ICK;
|
||||
break;
|
||||
case SND_SOC_DAIFMT_IB_IF:
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* I2S controller only supports master */
|
||||
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
|
||||
case SND_SOC_DAIFMT_CBS_CFS: /* CODEC slave */
|
||||
break;
|
||||
default:
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
ctx->cfg = c;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int au1xi2s_trigger(struct snd_pcm_substream *substream,
|
||||
int cmd, struct snd_soc_dai *dai)
|
||||
{
|
||||
struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
|
||||
int stype = SUBSTREAM_TYPE(substream);
|
||||
|
||||
switch (cmd) {
|
||||
case SNDRV_PCM_TRIGGER_START:
|
||||
case SNDRV_PCM_TRIGGER_RESUME:
|
||||
/* power up */
|
||||
WR(ctx, I2S_ENABLE, EN_D | EN_CE);
|
||||
WR(ctx, I2S_ENABLE, EN_CE);
|
||||
ctx->cfg |= (stype == PCM_TX) ? CFG_TN : CFG_RN;
|
||||
WR(ctx, I2S_CFG, ctx->cfg);
|
||||
break;
|
||||
case SNDRV_PCM_TRIGGER_STOP:
|
||||
case SNDRV_PCM_TRIGGER_SUSPEND:
|
||||
ctx->cfg &= ~((stype == PCM_TX) ? CFG_TN : CFG_RN);
|
||||
WR(ctx, I2S_CFG, ctx->cfg);
|
||||
WR(ctx, I2S_ENABLE, EN_D); /* power off */
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned long msbits_to_reg(int msbits)
|
||||
{
|
||||
switch (msbits) {
|
||||
case 8:
|
||||
return CFG_SZ_8;
|
||||
case 16:
|
||||
return CFG_SZ_16;
|
||||
case 18:
|
||||
return CFG_SZ_18;
|
||||
case 20:
|
||||
return CFG_SZ_20;
|
||||
case 24:
|
||||
return CFG_SZ_24;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xi2s_hw_params(struct snd_pcm_substream *substream,
|
||||
struct snd_pcm_hw_params *params,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
|
||||
unsigned long v;
|
||||
|
||||
v = msbits_to_reg(params->msbits);
|
||||
if (!v)
|
||||
return -EINVAL;
|
||||
|
||||
ctx->cfg &= ~CFG_SZ_MASK;
|
||||
ctx->cfg |= v;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xi2s_startup(struct snd_pcm_substream *substream,
|
||||
struct snd_soc_dai *dai)
|
||||
{
|
||||
struct au1xpsc_audio_data *ctx = snd_soc_dai_get_drvdata(dai);
|
||||
snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct snd_soc_dai_ops au1xi2s_dai_ops = {
|
||||
.startup = au1xi2s_startup,
|
||||
.trigger = au1xi2s_trigger,
|
||||
.hw_params = au1xi2s_hw_params,
|
||||
.set_fmt = au1xi2s_set_fmt,
|
||||
};
|
||||
|
||||
static struct snd_soc_dai_driver au1xi2s_dai_driver = {
|
||||
.symmetric_rates = 1,
|
||||
.playback = {
|
||||
.rates = AU1XI2SC_RATES,
|
||||
.formats = AU1XI2SC_FMTS,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
},
|
||||
.capture = {
|
||||
.rates = AU1XI2SC_RATES,
|
||||
.formats = AU1XI2SC_FMTS,
|
||||
.channels_min = 2,
|
||||
.channels_max = 2,
|
||||
},
|
||||
.ops = &au1xi2s_dai_ops,
|
||||
};
|
||||
|
||||
static int __devinit au1xi2s_drvprobe(struct platform_device *pdev)
|
||||
{
|
||||
int ret;
|
||||
struct resource *r;
|
||||
struct au1xpsc_audio_data *ctx;
|
||||
|
||||
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
||||
if (!ctx)
|
||||
return -ENOMEM;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!r) {
|
||||
ret = -ENODEV;
|
||||
goto out0;
|
||||
}
|
||||
|
||||
ret = -EBUSY;
|
||||
if (!request_mem_region(r->start, resource_size(r), pdev->name))
|
||||
goto out0;
|
||||
|
||||
ctx->mmio = ioremap_nocache(r->start, resource_size(r));
|
||||
if (!ctx->mmio)
|
||||
goto out1;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
|
||||
if (!r)
|
||||
goto out1;
|
||||
ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = r->start;
|
||||
|
||||
r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
|
||||
if (!r)
|
||||
goto out1;
|
||||
ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = r->start;
|
||||
|
||||
platform_set_drvdata(pdev, ctx);
|
||||
|
||||
ret = snd_soc_register_dai(&pdev->dev, &au1xi2s_dai_driver);
|
||||
if (ret)
|
||||
goto out1;
|
||||
|
||||
return 0;
|
||||
|
||||
snd_soc_unregister_dai(&pdev->dev);
|
||||
out1:
|
||||
release_mem_region(r->start, resource_size(r));
|
||||
out0:
|
||||
kfree(ctx);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit au1xi2s_drvremove(struct platform_device *pdev)
|
||||
{
|
||||
struct au1xpsc_audio_data *ctx = platform_get_drvdata(pdev);
|
||||
struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
|
||||
snd_soc_unregister_dai(&pdev->dev);
|
||||
|
||||
WR(ctx, I2S_ENABLE, EN_D); /* clock off, disable */
|
||||
|
||||
iounmap(ctx->mmio);
|
||||
release_mem_region(r->start, resource_size(r));
|
||||
kfree(ctx);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int au1xi2s_drvsuspend(struct device *dev)
|
||||
{
|
||||
struct au1xpsc_audio_data *ctx = dev_get_drvdata(dev);
|
||||
|
||||
WR(ctx, I2S_ENABLE, EN_D); /* clock off, disable */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int au1xi2s_drvresume(struct device *dev)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops au1xi2sc_pmops = {
|
||||
.suspend = au1xi2s_drvsuspend,
|
||||
.resume = au1xi2s_drvresume,
|
||||
};
|
||||
|
||||
#define AU1XI2SC_PMOPS (&au1xi2sc_pmops)
|
||||
|
||||
#else
|
||||
|
||||
#define AU1XI2SC_PMOPS NULL
|
||||
|
||||
#endif
|
||||
|
||||
static struct platform_driver au1xi2s_driver = {
|
||||
.driver = {
|
||||
.name = "alchemy-i2sc",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = AU1XI2SC_PMOPS,
|
||||
},
|
||||
.probe = au1xi2s_drvprobe,
|
||||
.remove = __devexit_p(au1xi2s_drvremove),
|
||||
};
|
||||
|
||||
static int __init au1xi2s_load(void)
|
||||
{
|
||||
return platform_driver_register(&au1xi2s_driver);
|
||||
}
|
||||
|
||||
static void __exit au1xi2s_unload(void)
|
||||
{
|
||||
platform_driver_unregister(&au1xi2s_driver);
|
||||
}
|
||||
|
||||
module_init(au1xi2s_load);
|
||||
module_exit(au1xi2s_unload);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Au1000/1500/1100 I2S ASoC driver");
|
||||
MODULE_AUTHOR("Manuel Lauss");
|
||||
@ -1,7 +1,7 @@
|
||||
/*
|
||||
* Au12x0/Au1550 PSC ALSA ASoC audio support.
|
||||
* Alchemy ALSA ASoC audio support.
|
||||
*
|
||||
* (c) 2007-2008 MSC Vertriebsges.m.b.H.,
|
||||
* (c) 2007-2011 MSC Vertriebsges.m.b.H.,
|
||||
* Manuel Lauss <manuel.lauss@gmail.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
@ -13,7 +13,13 @@
|
||||
#ifndef _AU1X_PCM_H
|
||||
#define _AU1X_PCM_H
|
||||
|
||||
/* DBDMA helpers */
|
||||
#define PCM_TX 0
|
||||
#define PCM_RX 1
|
||||
|
||||
#define SUBSTREAM_TYPE(substream) \
|
||||
((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
|
||||
|
||||
/* PSC/DBDMA helpers */
|
||||
extern struct platform_device *au1xpsc_pcm_add(struct platform_device *pdev);
|
||||
extern void au1xpsc_pcm_destroy(struct platform_device *dmapd);
|
||||
|
||||
@ -27,15 +33,10 @@ struct au1xpsc_audio_data {
|
||||
|
||||
unsigned long pm[2];
|
||||
struct mutex lock;
|
||||
int dmaids[2];
|
||||
struct platform_device *dmapd;
|
||||
};
|
||||
|
||||
#define PCM_TX 0
|
||||
#define PCM_RX 1
|
||||
|
||||
#define SUBSTREAM_TYPE(substream) \
|
||||
((substream)->stream == SNDRV_PCM_STREAM_PLAYBACK ? PCM_TX : PCM_RX)
|
||||
|
||||
/* easy access macros */
|
||||
#define PSC_CTRL(x) ((unsigned long)((x)->mmio) + PSC_CTRL_OFFSET)
|
||||
#define PSC_SEL(x) ((unsigned long)((x)->mmio) + PSC_SEL_OFFSET)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user