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openwrt/target/linux/coldfire/patches/033-m5445x_ssi_cleanup.patch

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From 98e15babf1e25868d22c024dac6133cc29059d39 Mon Sep 17 00:00:00 2001
From: Kurt Mahan <kmahan@freescale.com>
Date: Sun, 9 Dec 2007 02:24:13 -0700
Subject: [PATCH] Fix DMA mode and cleanup driver.
LTIBName: m5445x-ssi-cleanup
Signed-off-by: Kurt Mahan <kmahan@freescale.com>
---
drivers/spi/ssi_audio.c | 207 ++++++++++++++++++++++++-----------------------
1 files changed, 104 insertions(+), 103 deletions(-)
--- a/drivers/spi/ssi_audio.c
+++ b/drivers/spi/ssi_audio.c
@@ -2,7 +2,7 @@
* MCF5445x audio driver.
*
* Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
- * Copyright Freescale Semiconductor, Inc. 2006
+ * Copyright Freescale Semiconductor, Inc. 2006, 2007
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -25,9 +25,11 @@
#include <asm/coldfire.h>
#include <asm/coldfire_edma.h>
+#ifdef CONFIG_M54455
#include <asm/mcf5445x_ssi.h>
#include <asm/mcf5445x_ccm.h>
#include <asm/mcf5445x_gpio.h>
+#endif
#define SOUND_DEVICE_NAME "sound"
#define DRIVER_NAME "ssi_audio"
@@ -47,8 +49,8 @@
/* TLV320DAC23 audio chip registers */
-#define CODEC_LEFT_IN_REG (0x00)
-#define CODEC_RIGHT_IN_REG (0x01)
+#define CODEC_LEFT_IN_REG (0x00)
+#define CODEC_RIGHT_IN_REG (0x01)
#define CODEC_LEFT_HP_VOL_REG (0x02)
#define CODEC_RIGHT_HP_VOL_REG (0x03)
#define CODEC_ANALOG_APATH_REG (0x04)
@@ -57,7 +59,7 @@
#define CODEC_DIGITAL_IF_FMT_REG (0x07)
#define CODEC_SAMPLE_RATE_REG (0x08)
#define CODEC_DIGITAL_IF_ACT_REG (0x09)
-#define CODEC_RESET_REG (0x0f)
+#define CODEC_RESET_REG (0x0f)
#define CODEC_SAMPLE_8KHZ (0x0C)
#define CODEC_SAMPLE_16KHZ (0x58)
@@ -71,21 +73,21 @@
/* DMA transfer size */
#define DMASIZE (16*1024)
-/* transmit eDMA channel for SSI channel 0 */
-#define DMA_TCD 10
-/* transmit eDMA channel for SSI channel 1 */
-#define DMA_TCD2 11
+/* eDMA channel for SSI channel 0 TX */
+#define DMA_TCD MCF_EDMA_CHAN_TIMER2
+/* eDMA channel for SSI channel 1 TX */
+#define DMA_TCD2 MCF_EDMA_CHAN_TIMER3
struct ssi_audio {
- struct spi_device *spi;
+ struct spi_device *spi;
u32 speed;
u32 stereo;
u32 bits;
u32 format;
- u8 isopen;
- u8 dmaing;
- u8 ssi_enabled;
- u8 channel;
+ u8 isopen;
+ u8 dmaing;
+ u8 ssi_enabled;
+ u8 channel;
spinlock_t lock;
u8* audio_buf;
};
@@ -129,7 +131,8 @@ static void ssi_audio_setsamplesize(int
}
#ifdef AUDIO_DEBUG
- printk(DRIVER_NAME ":ssi_audio_setsamplesize %d %d\n", audio_device->format, audio_device->bits);
+ printk(DRIVER_NAME ":ssi_audio_setsamplesize %d %d\n",
+ audio_device->format, audio_device->bits);
#endif
}
@@ -157,62 +160,57 @@ void __inline__ ssi_audio_dmarun(void)
{
set_edma_params(DMA_TCD,
#ifdef USE_MMU
- virt_to_phys(&(audio_device->audio_buf[audio_start])),
+ virt_to_phys(&(audio_device->audio_buf[audio_start])),
#else
- (u32)&(audio_device->audio_buf[audio_start]),
+ (u32)&(audio_device->audio_buf[audio_start]),
#endif
- (u32)&MCF_SSI_TX0,
- MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
- 8,
- 4,
- 0,
- audio_count/8,
- audio_count/8,
- 0,
- 0,
- 0, // major_int
- 0 // disable_req
- );
+ (u32)&MCF_SSI_TX0,
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
+ 8,
+ 4,
+ 0,
+ audio_count/8,
+ audio_count/8,
+ 0,
+ 0,
+ 0, // major_int
+ 0 // disable_req
+ );
set_edma_params(DMA_TCD2,
#ifdef USE_MMU
- virt_to_phys(&(audio_device->audio_buf[audio_start+4])),
+ virt_to_phys(&(audio_device->audio_buf[audio_start+4])),
#else
- (u32)&(audio_device->audio_buf[audio_start+4]),
+ (u32)&(audio_device->audio_buf[audio_start+4]),
#endif
- (u32)&MCF_SSI_TX1,
- MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
- 8,
- 4,
- 0,
- audio_count/8,
- audio_count/8,
- 0,
- 0,
- 1, // major_int
- 0 // disable_req
- );
+ (u32)&MCF_SSI_TX1,
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
+ 8,
+ 4,
+ 0,
+ audio_count/8,
+ audio_count/8,
+ 0,
+ 0,
+ 1, // major_int
+ 0 // disable_req
+ );
audio_device->dmaing = 1;
audio_txbusy = 1;
start_edma_transfer(DMA_TCD);
start_edma_transfer(DMA_TCD2);
-#if 0
- MCF_EDMA_ERQ |= (1<<DMA_TCD) | (1<<DMA_TCD2);
- MCF_EDMA_SSRT = DMA_TCD;
- MCF_EDMA_SSRT = DMA_TCD2;
-#endif
-
}
-/*
- * Start DMA'ing a new buffer of data if any available.
+/**
+ * ssi_audio_dmabuf - Start DMA'ing a new buffer of data if any available.
*/
static void ssi_audio_dmabuf(void)
{
#ifdef AUDIO_DEBUG
- printk(DRIVER_NAME ":ssi_audio_dmabuf(): append=%x start=%x\n", audio_append, audio_appstart);
+ printk(DRIVER_NAME ":ssi_audio_dmabuf(): append=%x start=%x\n",
+ audio_append, audio_appstart);
#endif
/* If already running then nothing to do... */
@@ -241,7 +239,8 @@ static void ssi_audio_dmabuf(void)
}
}
-void __inline__ stop_dma(void) {
+void __inline__ stop_dma(void)
+{
stop_edma_transfer(DMA_TCD);
stop_edma_transfer(DMA_TCD2);
}
@@ -283,7 +282,6 @@ static void init_dma(void)
#endif /* CONFIG_SSIAUDIO_USE_EDMA */
-
/* Write CODEC register using SPI
* address - CODEC register address
* data - data to be written into register
@@ -296,7 +294,8 @@ static int codec_write(u8 addr, u16 data
return -ENODEV;
spi_word = ((addr & 0x7F)<<9)|(data & 0x1FF);
- return spi_write(audio_device->spi, (const u8*)&spi_word, sizeof(spi_word));
+ return spi_write(audio_device->spi, (const u8*)&spi_word,
+ sizeof(spi_word));
}
static inline void enable_ssi(void)
@@ -359,7 +358,7 @@ static void init_audio_codec(void)
codec_write(CODEC_DIGITAL_APATH_REG, 0x007); /* Set A path */
/* set sample rate */
- adjust_codec_speed();
+ adjust_codec_speed();
codec_write(CODEC_LEFT_HP_VOL_REG, 0x075); /* set volume */
codec_write(CODEC_RIGHT_HP_VOL_REG, 0x075); /* set volume */
@@ -375,13 +374,12 @@ static void chip_init(void)
#endif
/* Enable the SSI pins */
- MCF_GPIO_PAR_SSI = ( 0
- | MCF_GPIO_PAR_SSI_MCLK
- | MCF_GPIO_PAR_SSI_STXD(3)
- | MCF_GPIO_PAR_SSI_SRXD(3)
- | MCF_GPIO_PAR_SSI_FS(3)
- | MCF_GPIO_PAR_SSI_BCLK(3) );
-
+ MCF_GPIO_PAR_SSI = (0
+ | MCF_GPIO_PAR_SSI_MCLK
+ | MCF_GPIO_PAR_SSI_STXD(3)
+ | MCF_GPIO_PAR_SSI_SRXD(3)
+ | MCF_GPIO_PAR_SSI_FS(3)
+ | MCF_GPIO_PAR_SSI_BCLK(3) );
}
static void init_ssi(void)
@@ -430,8 +428,8 @@ static void init_ssi(void)
;
MCF_SSI_FCSR = 0
- | MCF_SSI_FCSR_TFWM0(0)
- | MCF_SSI_FCSR_TFWM1(0)
+ | MCF_SSI_FCSR_TFWM0(2)
+ | MCF_SSI_FCSR_TFWM1(2)
;
MCF_SSI_IER = 0 // interrupts
@@ -459,9 +457,8 @@ static int ssi_audio_isr(int irq, void *
{
unsigned long *bp;
- if (audio_txbusy==0) {
+ if (audio_txbusy==0)
return IRQ_HANDLED;
- }
spin_lock(&(audio_device->lock));
@@ -560,7 +557,8 @@ static int ssi_audio_close(struct inode
}
/* write to audio device */
-static ssize_t ssi_audio_write(struct file *filp, const char *buf, size_t count, loff_t *ppos)
+static ssize_t ssi_audio_write(struct file *filp, const char *buf,
+ size_t count, loff_t *ppos)
{
unsigned long *dp, *buflp;
unsigned short *bufwp;
@@ -568,10 +566,12 @@ static ssize_t ssi_audio_write(struct fi
unsigned int slen, bufcnt, i, s, e;
#ifdef AUDIO_DEBUG
- printk(DRIVER_NAME ":ssi_audio_write(buf=%x,count=%d)\n", (int) buf, count);
+ printk(DRIVER_NAME ":ssi_audio_write(buf=%x,count=%d)\n",
+ (int)buf, count);
#endif
- if (audio_device==NULL) return (-ENODEV);
+ if (audio_device==NULL)
+ return (-ENODEV);
if (count <= 0)
return 0;
@@ -592,8 +592,8 @@ static ssize_t ssi_audio_write(struct fi
tryagain:
/*
- * Get a snapshot of buffer, so we can figure out how
- * much data we can fit in...
+ * Get a snapshot of buffer, so we can figure out how
+ * much data we can fit in...
*/
s = audio_start;
e = audio_append;
@@ -613,11 +613,12 @@ tryagain:
goto tryagain;
}
- /* For DMA we need to have data as 32 bit
- values (since SSI TX register is 32 bit).
- So, the incomming 16 bit data must be put to buffer as 32 bit values.
- Also, the endianess is converted if needed
- */
+ /*
+ * For DMA we need to have data as 32 bit
+ * values (since SSI TX register is 32 bit).
+ * So, the incoming 16 bit data must be put to buffer as 32 bit values.
+ * Also, the endianess is converted if needed
+ */
if (audio_device->stereo) {
if (audio_device->bits == 16) {
if (audio_device->format==AFMT_S16_LE) {
@@ -678,16 +679,19 @@ tryagain:
}
/* ioctl: control the driver */
-static int ssi_audio_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
+static int ssi_audio_ioctl(struct inode *inode, struct file *filp,
+ unsigned int cmd, unsigned long arg)
{
- long val;
- int rc = 0;
+ long val;
+ int rc = 0;
#ifdef AUDIO_DEBUG
- printk(DRIVER_NAME ":ssi_audio_ioctl(cmd=%x,arg=%x)\n", (int) cmd, (int) arg);
+ printk(DRIVER_NAME ":ssi_audio_ioctl(cmd=%x,arg=%x)\n",
+ (int)cmd, (int)arg);
#endif
- if (audio_device==NULL) return (-ENODEV);
+ if (audio_device==NULL)
+ return (-ENODEV);
switch (cmd) {
@@ -744,8 +748,6 @@ static int ssi_audio_ioctl(struct inode
return rc;
}
-/****************************************************************************/
-
struct file_operations ssi_audio_fops = {
open: ssi_audio_open, /* open */
release: ssi_audio_close, /* close */
@@ -756,8 +758,8 @@ struct file_operations ssi_audio_fops =
/* initialize audio driver */
static int __devinit ssi_audio_probe(struct spi_device *spi)
{
- struct ssi_audio *audio;
- int err;
+ struct ssi_audio *audio;
+ int err;
#ifdef AUDIO_DEBUG
printk(DRIVER_NAME": probe\n");
@@ -804,7 +806,7 @@ static int __devinit ssi_audio_probe(str
audio->spi = spi;
#ifndef CONFIG_SSIAUDIO_USE_EDMA
- if (request_irq(spi->irq, ssi_audio_isr, SA_INTERRUPT, spi->dev.bus_id, audio)) {
+ if (request_irq(spi->irq, ssi_audio_isr, IRQF_DISABLED, spi->dev.bus_id, audio)) {
dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
err = -EBUSY;
goto err_free_mem;
@@ -813,25 +815,21 @@ static int __devinit ssi_audio_probe(str
#else
/* request 2 eDMA channels since two channel output mode is used */
if (request_edma_channel(DMA_TCD,
- ssi_audio_dma_handler_empty,
- NULL,
- audio,
- &(audio_device->lock),
- DRIVER_NAME
- )!=0)
- {
+ ssi_audio_dma_handler_empty,
+ NULL,
+ audio,
+ &(audio_device->lock),
+ DRIVER_NAME)!=0) {
dev_dbg(&spi->dev, "DMA channel %d busy?\n", DMA_TCD);
err = -EBUSY;
goto err_free_mem;
}
if (request_edma_channel(DMA_TCD2,
- ssi_audio_dma_handler,
- NULL,
- audio,
- &(audio_device->lock),
- DRIVER_NAME
- )!=0)
- {
+ ssi_audio_dma_handler,
+ NULL,
+ audio,
+ &(audio_device->lock),
+ DRIVER_NAME)!=0) {
dev_dbg(&spi->dev, "DMA channel %d busy?\n", DMA_TCD2);
err = -EBUSY;
goto err_free_mem;
@@ -870,11 +868,13 @@ static int __devexit ssi_audio_remove(st
return 0;
}
-static int ssi_audio_suspend(struct spi_device *spi, pm_message_t message) {
+static int ssi_audio_suspend(struct spi_device *spi, pm_message_t message)
+{
return 0;
}
-static int ssi_audio_resume(struct spi_device *spi) {
+static int ssi_audio_resume(struct spi_device *spi)
+{
return 0;
}
@@ -902,5 +902,6 @@ static void __exit ssi_audio_exit(void)
}
module_exit(ssi_audio_exit);
-MODULE_DESCRIPTION("SSI/I2S Audio Driver");
MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("SSI/I2S Audio Driver");
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