diff mbox

[6/6] ASoC: sh: discontinue support of dma-sh7760 driver

Message ID 871tm4j0er.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kuninori Morimoto Feb. 5, 2015, 7:12 a.m. UTC
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

In upstream kernel, no one is using SND_SOC_PCM_SH7760 / sh7760-pcm-audio.
This patch discontinue support of dma-sh7760 driver to reducing
maintenance cost. Thank you and good bye dma-sh7760 driver.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/sh/Kconfig      |   11 --
 sound/soc/sh/Makefile     |    4 -
 sound/soc/sh/dma-sh7760.c |  352 ---------------------------------------------
 3 files changed, 367 deletions(-)
 delete mode 100644 sound/soc/sh/dma-sh7760.c
diff mbox

Patch

diff --git a/sound/soc/sh/Kconfig b/sound/soc/sh/Kconfig
index 0319165b..e9f735f 100644
--- a/sound/soc/sh/Kconfig
+++ b/sound/soc/sh/Kconfig
@@ -1,17 +1,6 @@ 
 menu "SoC Audio support for SuperH"
 	depends on SUPERH || ARCH_SHMOBILE
 
-config SND_SOC_PCM_SH7760
-	tristate "SoC Audio support for Renesas SH7760"
-	depends on CPU_SUBTYPE_SH7760 && SH_DMABRG
-	help
-	  Enable this option for SH7760 AC97/I2S audio support.
-
-
-##
-## Audio unit modules
-##
-
 config SND_SOC_SH4_FSI
 	tristate "SH4 FSI support"
 	select SND_SIMPLE_CARD
diff --git a/sound/soc/sh/Makefile b/sound/soc/sh/Makefile
index 84362aa..fa78ffa 100644
--- a/sound/soc/sh/Makefile
+++ b/sound/soc/sh/Makefile
@@ -1,7 +1,3 @@ 
-## DMA engines
-snd-soc-dma-sh7760-objs	:= dma-sh7760.o
-obj-$(CONFIG_SND_SOC_PCM_SH7760)	+= snd-soc-dma-sh7760.o
-
 ## audio units found on some SH-4
 snd-soc-fsi-objs	:= fsi.o
 obj-$(CONFIG_SND_SOC_SH4_FSI)	+= snd-soc-fsi.o
diff --git a/sound/soc/sh/dma-sh7760.c b/sound/soc/sh/dma-sh7760.c
deleted file mode 100644
index fd11404..0000000
--- a/sound/soc/sh/dma-sh7760.c
+++ /dev/null
@@ -1,352 +0,0 @@ 
-/*
- * SH7760 ("camelot") DMABRG audio DMA unit support
- *
- * Copyright (C) 2007 Manuel Lauss <mano@roarinelk.homelinux.net>
- *  licensed under the terms outlined in the file COPYING at the root
- *  of the linux kernel sources.
- *
- * The SH7760 DMABRG provides 4 dma channels (2x rec, 2x play), which
- * trigger an interrupt when one half of the programmed transfer size
- * has been xmitted.
- *
- * FIXME: little-endian only for now
- */
-
-#include <linux/module.h>
-#include <linux/gfp.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/dma-mapping.h>
-#include <sound/core.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-#include <asm/dmabrg.h>
-
-
-/* registers and bits */
-#define BRGATXSAR	0x00
-#define BRGARXDAR	0x04
-#define BRGATXTCR	0x08
-#define BRGARXTCR	0x0C
-#define BRGACR		0x10
-#define BRGATXTCNT	0x14
-#define BRGARXTCNT	0x18
-
-#define ACR_RAR		(1 << 18)
-#define ACR_RDS		(1 << 17)
-#define ACR_RDE		(1 << 16)
-#define ACR_TAR		(1 << 2)
-#define ACR_TDS		(1 << 1)
-#define ACR_TDE		(1 << 0)
-
-/* receiver/transmitter data alignment */
-#define ACR_RAM_NONE	(0 << 24)
-#define ACR_RAM_4BYTE	(1 << 24)
-#define ACR_RAM_2WORD	(2 << 24)
-#define ACR_TAM_NONE	(0 << 8)
-#define ACR_TAM_4BYTE	(1 << 8)
-#define ACR_TAM_2WORD	(2 << 8)
-
-
-struct camelot_pcm {
-	unsigned long mmio;  /* DMABRG audio channel control reg MMIO */
-	unsigned int txid;    /* ID of first DMABRG IRQ for this unit */
-
-	struct snd_pcm_substream *tx_ss;
-	unsigned long tx_period_size;
-	unsigned int  tx_period;
-
-	struct snd_pcm_substream *rx_ss;
-	unsigned long rx_period_size;
-	unsigned int  rx_period;
-
-} cam_pcm_data[2] = {
-	{
-		.mmio	=	0xFE3C0040,
-		.txid	=	DMABRGIRQ_A0TXF,
-	},
-	{
-		.mmio	=	0xFE3C0060,
-		.txid	=	DMABRGIRQ_A1TXF,
-	},
-};
-
-#define BRGREG(x)	(*(unsigned long *)(cam->mmio + (x)))
-
-/*
- * set a minimum of 16kb per period, to avoid interrupt-"storm" and
- * resulting skipping. In general, the bigger the minimum size, the
- * better for overall system performance. (The SH7760 is a puny CPU
- * with a slow SDRAM interface and poor internal bus bandwidth,
- * *especially* when the LCDC is active).  The minimum for the DMAC
- * is 8 bytes; 16kbytes are enough to get skip-free playback of a
- * 44kHz/16bit/stereo MP3 on a lightly loaded system, and maintain
- * reasonable responsiveness in MPlayer.
- */
-#define DMABRG_PERIOD_MIN		16 * 1024
-#define DMABRG_PERIOD_MAX		0x03fffffc
-#define DMABRG_PREALLOC_BUFFER		32 * 1024
-#define DMABRG_PREALLOC_BUFFER_MAX	32 * 1024
-
-static struct snd_pcm_hardware camelot_pcm_hardware = {
-	.info = (SNDRV_PCM_INFO_MMAP |
-		SNDRV_PCM_INFO_INTERLEAVED |
-		SNDRV_PCM_INFO_BLOCK_TRANSFER |
-		SNDRV_PCM_INFO_MMAP_VALID |
-		SNDRV_PCM_INFO_BATCH),
-	.buffer_bytes_max =	DMABRG_PERIOD_MAX,
-	.period_bytes_min =	DMABRG_PERIOD_MIN,
-	.period_bytes_max =	DMABRG_PERIOD_MAX / 2,
-	.periods_min =		2,
-	.periods_max =		2,
-	.fifo_size =		128,
-};
-
-static void camelot_txdma(void *data)
-{
-	struct camelot_pcm *cam = data;
-	cam->tx_period ^= 1;
-	snd_pcm_period_elapsed(cam->tx_ss);
-}
-
-static void camelot_rxdma(void *data)
-{
-	struct camelot_pcm *cam = data;
-	cam->rx_period ^= 1;
-	snd_pcm_period_elapsed(cam->rx_ss);
-}
-
-static int camelot_pcm_open(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct camelot_pcm *cam = &cam_pcm_data[rtd->cpu_dai->id];
-	int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
-	int ret, dmairq;
-
-	snd_soc_set_runtime_hwparams(substream, &camelot_pcm_hardware);
-
-	/* DMABRG buffer half/full events */
-	dmairq = (recv) ? cam->txid + 2 : cam->txid;
-	if (recv) {
-		cam->rx_ss = substream;
-		ret = dmabrg_request_irq(dmairq, camelot_rxdma, cam);
-		if (unlikely(ret)) {
-			pr_debug("audio unit %d irqs already taken!\n",
-			     rtd->cpu_dai->id);
-			return -EBUSY;
-		}
-		(void)dmabrg_request_irq(dmairq + 1,camelot_rxdma, cam);
-	} else {
-		cam->tx_ss = substream;
-		ret = dmabrg_request_irq(dmairq, camelot_txdma, cam);
-		if (unlikely(ret)) {
-			pr_debug("audio unit %d irqs already taken!\n",
-			     rtd->cpu_dai->id);
-			return -EBUSY;
-		}
-		(void)dmabrg_request_irq(dmairq + 1, camelot_txdma, cam);
-	}
-	return 0;
-}
-
-static int camelot_pcm_close(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct camelot_pcm *cam = &cam_pcm_data[rtd->cpu_dai->id];
-	int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
-	int dmairq;
-
-	dmairq = (recv) ? cam->txid + 2 : cam->txid;
-
-	if (recv)
-		cam->rx_ss = NULL;
-	else
-		cam->tx_ss = NULL;
-
-	dmabrg_free_irq(dmairq + 1);
-	dmabrg_free_irq(dmairq);
-
-	return 0;
-}
-
-static int camelot_hw_params(struct snd_pcm_substream *substream,
-			     struct snd_pcm_hw_params *hw_params)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct camelot_pcm *cam = &cam_pcm_data[rtd->cpu_dai->id];
-	int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
-	int ret;
-
-	ret = snd_pcm_lib_malloc_pages(substream,
-				       params_buffer_bytes(hw_params));
-	if (ret < 0)
-		return ret;
-
-	if (recv) {
-		cam->rx_period_size = params_period_bytes(hw_params);
-		cam->rx_period = 0;
-	} else {
-		cam->tx_period_size = params_period_bytes(hw_params);
-		cam->tx_period = 0;
-	}
-	return 0;
-}
-
-static int camelot_hw_free(struct snd_pcm_substream *substream)
-{
-	return snd_pcm_lib_free_pages(substream);
-}
-
-static int camelot_prepare(struct snd_pcm_substream *substream)
-{
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct camelot_pcm *cam = &cam_pcm_data[rtd->cpu_dai->id];
-
-	pr_debug("PCM data: addr 0x%08ulx len %d\n",
-		 (u32)runtime->dma_addr, runtime->dma_bytes);
- 
-	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
-		BRGREG(BRGATXSAR) = (unsigned long)runtime->dma_area;
-		BRGREG(BRGATXTCR) = runtime->dma_bytes;
-	} else {
-		BRGREG(BRGARXDAR) = (unsigned long)runtime->dma_area;
-		BRGREG(BRGARXTCR) = runtime->dma_bytes;
-	}
-
-	return 0;
-}
-
-static inline void dmabrg_play_dma_start(struct camelot_pcm *cam)
-{
-	unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
-	/* start DMABRG engine: XFER start, auto-addr-reload */
-	BRGREG(BRGACR) = acr | ACR_TDE | ACR_TAR | ACR_TAM_2WORD;
-}
-
-static inline void dmabrg_play_dma_stop(struct camelot_pcm *cam)
-{
-	unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
-	/* forcibly terminate data transmission */
-	BRGREG(BRGACR) = acr | ACR_TDS;
-}
-
-static inline void dmabrg_rec_dma_start(struct camelot_pcm *cam)
-{
-	unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
-	/* start DMABRG engine: recv start, auto-reload */
-	BRGREG(BRGACR) = acr | ACR_RDE | ACR_RAR | ACR_RAM_2WORD;
-}
-
-static inline void dmabrg_rec_dma_stop(struct camelot_pcm *cam)
-{
-	unsigned long acr = BRGREG(BRGACR) & ~(ACR_TDS | ACR_RDS);
-	/* forcibly terminate data receiver */
-	BRGREG(BRGACR) = acr | ACR_RDS;
-}
-
-static int camelot_trigger(struct snd_pcm_substream *substream, int cmd)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct camelot_pcm *cam = &cam_pcm_data[rtd->cpu_dai->id];
-	int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
-
-	switch (cmd) {
-	case SNDRV_PCM_TRIGGER_START:
-		if (recv)
-			dmabrg_rec_dma_start(cam);
-		else
-			dmabrg_play_dma_start(cam);
-		break;
-	case SNDRV_PCM_TRIGGER_STOP:
-		if (recv)
-			dmabrg_rec_dma_stop(cam);
-		else
-			dmabrg_play_dma_stop(cam);
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static snd_pcm_uframes_t camelot_pos(struct snd_pcm_substream *substream)
-{
-	struct snd_pcm_runtime *runtime = substream->runtime;
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct camelot_pcm *cam = &cam_pcm_data[rtd->cpu_dai->id];
-	int recv = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0:1;
-	unsigned long pos;
-
-	/* cannot use the DMABRG pointer register: under load, by the
-	 * time ALSA comes around to read the register, it is already
-	 * far ahead (or worse, already done with the fragment) of the
-	 * position at the time the IRQ was triggered, which results in
-	 * fast-playback sound in my test application (ScummVM)
-	 */
-	if (recv)
-		pos = cam->rx_period ? cam->rx_period_size : 0;
-	else
-		pos = cam->tx_period ? cam->tx_period_size : 0;
-
-	return bytes_to_frames(runtime, pos);
-}
-
-static struct snd_pcm_ops camelot_pcm_ops = {
-	.open		= camelot_pcm_open,
-	.close		= camelot_pcm_close,
-	.ioctl		= snd_pcm_lib_ioctl,
-	.hw_params	= camelot_hw_params,
-	.hw_free	= camelot_hw_free,
-	.prepare	= camelot_prepare,
-	.trigger	= camelot_trigger,
-	.pointer	= camelot_pos,
-};
-
-static int camelot_pcm_new(struct snd_soc_pcm_runtime *rtd)
-{
-	struct snd_pcm *pcm = rtd->pcm;
-
-	/* dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel
-	 * in MMAP mode (i.e. aplay -M)
-	 */
-	snd_pcm_lib_preallocate_pages_for_all(pcm,
-		SNDRV_DMA_TYPE_CONTINUOUS,
-		snd_dma_continuous_data(GFP_KERNEL),
-		DMABRG_PREALLOC_BUFFER,	DMABRG_PREALLOC_BUFFER_MAX);
-
-	return 0;
-}
-
-static struct snd_soc_platform_driver sh7760_soc_platform = {
-	.ops		= &camelot_pcm_ops,
-	.pcm_new	= camelot_pcm_new,
-};
-
-static int sh7760_soc_platform_probe(struct platform_device *pdev)
-{
-	return snd_soc_register_platform(&pdev->dev, &sh7760_soc_platform);
-}
-
-static int sh7760_soc_platform_remove(struct platform_device *pdev)
-{
-	snd_soc_unregister_platform(&pdev->dev);
-	return 0;
-}
-
-static struct platform_driver sh7760_pcm_driver = {
-	.driver = {
-			.name = "sh7760-pcm-audio",
-	},
-
-	.probe = sh7760_soc_platform_probe,
-	.remove = sh7760_soc_platform_remove,
-};
-
-module_platform_driver(sh7760_pcm_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("SH7760 Audio DMA (DMABRG) driver");
-MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");