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alistair23-linux/sound/soc/blackfin/bf5xx-ac97.c
Mark Brown 3f4b783cfd ASoC: Register platform DAIs 
Register all platform DAIs with the core.  In line with current behaviour
this is done at module probe time rather than when the devices are probed
(since currently that only happens as the entire ASoC card is registered
except for those drivers that currently implement some kind of hotplug).
Since the core currently ignores DAI registration this has no practical
effect.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2008-12-09 10:49:27 +00:00

449 lines
11 KiB
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/*
* bf5xx-ac97.c -- AC97 support for the ADI blackfin chip.
*
* Author: Roy Huang
* Created: 11th. June 2007
* Copyright: Analog Device Inc.
*
* 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/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <asm/irq.h>
#include <asm/portmux.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
#include "bf5xx-sport.h"
#include "bf5xx-ac97.h"
#if defined(CONFIG_BF54x)
#define PIN_REQ_SPORT_0 {P_SPORT0_TFS, P_SPORT0_DTPRI, P_SPORT0_TSCLK, \
P_SPORT0_RFS, P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0}
#define PIN_REQ_SPORT_1 {P_SPORT1_TFS, P_SPORT1_DTPRI, P_SPORT1_TSCLK, \
P_SPORT1_RFS, P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0}
#define PIN_REQ_SPORT_2 {P_SPORT2_TFS, P_SPORT2_DTPRI, P_SPORT2_TSCLK, \
P_SPORT2_RFS, P_SPORT2_DRPRI, P_SPORT2_RSCLK, 0}
#define PIN_REQ_SPORT_3 {P_SPORT3_TFS, P_SPORT3_DTPRI, P_SPORT3_TSCLK, \
P_SPORT3_RFS, P_SPORT3_DRPRI, P_SPORT3_RSCLK, 0}
#else
#define PIN_REQ_SPORT_0 {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS, \
P_SPORT0_DRPRI, P_SPORT0_RSCLK, 0}
#define PIN_REQ_SPORT_1 {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, \
P_SPORT1_DRPRI, P_SPORT1_RSCLK, 0}
#endif
static int *cmd_count;
static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
static u16 sport_req[][7] = {
PIN_REQ_SPORT_0,
#ifdef PIN_REQ_SPORT_1
PIN_REQ_SPORT_1,
#endif
#ifdef PIN_REQ_SPORT_2
PIN_REQ_SPORT_2,
#endif
#ifdef PIN_REQ_SPORT_3
PIN_REQ_SPORT_3,
#endif
};
static struct sport_param sport_params[4] = {
{
.dma_rx_chan = CH_SPORT0_RX,
.dma_tx_chan = CH_SPORT0_TX,
.err_irq = IRQ_SPORT0_ERROR,
.regs = (struct sport_register *)SPORT0_TCR1,
},
#ifdef PIN_REQ_SPORT_1
{
.dma_rx_chan = CH_SPORT1_RX,
.dma_tx_chan = CH_SPORT1_TX,
.err_irq = IRQ_SPORT1_ERROR,
.regs = (struct sport_register *)SPORT1_TCR1,
},
#endif
#ifdef PIN_REQ_SPORT_2
{
.dma_rx_chan = CH_SPORT2_RX,
.dma_tx_chan = CH_SPORT2_TX,
.err_irq = IRQ_SPORT2_ERROR,
.regs = (struct sport_register *)SPORT2_TCR1,
},
#endif
#ifdef PIN_REQ_SPORT_3
{
.dma_rx_chan = CH_SPORT3_RX,
.dma_tx_chan = CH_SPORT3_TX,
.err_irq = IRQ_SPORT3_ERROR,
.regs = (struct sport_register *)SPORT3_TCR1,
}
#endif
};
void bf5xx_pcm_to_ac97(struct ac97_frame *dst, const __u16 *src,
size_t count, unsigned int chan_mask)
{
while (count--) {
dst->ac97_tag = TAG_VALID;
if (chan_mask & SP_FL) {
dst->ac97_pcm_r = *src++;
dst->ac97_tag |= TAG_PCM_RIGHT;
}
if (chan_mask & SP_FR) {
dst->ac97_pcm_l = *src++;
dst->ac97_tag |= TAG_PCM_LEFT;
}
#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
if (chan_mask & SP_SR) {
dst->ac97_sl = *src++;
dst->ac97_tag |= TAG_PCM_SL;
}
if (chan_mask & SP_SL) {
dst->ac97_sr = *src++;
dst->ac97_tag |= TAG_PCM_SR;
}
if (chan_mask & SP_LFE) {
dst->ac97_lfe = *src++;
dst->ac97_tag |= TAG_PCM_LFE;
}
if (chan_mask & SP_FC) {
dst->ac97_center = *src++;
dst->ac97_tag |= TAG_PCM_CENTER;
}
#endif
dst++;
}
}
EXPORT_SYMBOL(bf5xx_pcm_to_ac97);
void bf5xx_ac97_to_pcm(const struct ac97_frame *src, __u16 *dst,
size_t count)
{
while (count--) {
*(dst++) = src->ac97_pcm_l;
*(dst++) = src->ac97_pcm_r;
src++;
}
}
EXPORT_SYMBOL(bf5xx_ac97_to_pcm);
static unsigned int sport_tx_curr_frag(struct sport_device *sport)
{
return sport->tx_curr_frag = sport_curr_offset_tx(sport) /
sport->tx_fragsize;
}
static void enqueue_cmd(struct snd_ac97 *ac97, __u16 addr, __u16 data)
{
struct sport_device *sport = sport_handle;
int nextfrag = sport_tx_curr_frag(sport);
struct ac97_frame *nextwrite;
sport_incfrag(sport, &nextfrag, 1);
nextwrite = (struct ac97_frame *)(sport->tx_buf +
nextfrag * sport->tx_fragsize);
pr_debug("sport->tx_buf:%p, nextfrag:0x%x nextwrite:%p, cmd_count:%d\n",
sport->tx_buf, nextfrag, nextwrite, cmd_count[nextfrag]);
nextwrite[cmd_count[nextfrag]].ac97_tag |= TAG_CMD;
nextwrite[cmd_count[nextfrag]].ac97_addr = addr;
nextwrite[cmd_count[nextfrag]].ac97_data = data;
++cmd_count[nextfrag];
pr_debug("ac97_sport: Inserting %02x/%04x into fragment %d\n",
addr >> 8, data, nextfrag);
}
static unsigned short bf5xx_ac97_read(struct snd_ac97 *ac97,
unsigned short reg)
{
struct ac97_frame out_frame[2], in_frame[2];
pr_debug("%s enter 0x%x\n", __func__, reg);
/* When dma descriptor is enabled, the register should not be read */
if (sport_handle->tx_run || sport_handle->rx_run) {
pr_err("Could you send a mail to cliff.cai@analog.com "
"to report this?\n");
return -EFAULT;
}
memset(&out_frame, 0, 2 * sizeof(struct ac97_frame));
memset(&in_frame, 0, 2 * sizeof(struct ac97_frame));
out_frame[0].ac97_tag = TAG_VALID | TAG_CMD;
out_frame[0].ac97_addr = ((reg << 8) | 0x8000);
sport_send_and_recv(sport_handle, (unsigned char *)&out_frame,
(unsigned char *)&in_frame,
2 * sizeof(struct ac97_frame));
return in_frame[1].ac97_data;
}
void bf5xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
unsigned short val)
{
pr_debug("%s enter 0x%x:0x%04x\n", __func__, reg, val);
if (sport_handle->tx_run) {
enqueue_cmd(ac97, (reg << 8), val); /* write */
enqueue_cmd(ac97, (reg << 8) | 0x8000, 0); /* read back */
} else {
struct ac97_frame frame;
memset(&frame, 0, sizeof(struct ac97_frame));
frame.ac97_tag = TAG_VALID | TAG_CMD;
frame.ac97_addr = (reg << 8);
frame.ac97_data = val;
sport_send_and_recv(sport_handle, (unsigned char *)&frame, \
NULL, sizeof(struct ac97_frame));
}
}
static void bf5xx_ac97_warm_reset(struct snd_ac97 *ac97)
{
#if defined(CONFIG_BF54x) || defined(CONFIG_BF561) || \
(defined(BF537_FAMILY) && (CONFIG_SND_BF5XX_SPORT_NUM == 1))
#define CONCAT(a, b, c) a ## b ## c
#define BFIN_SPORT_RFS(x) CONCAT(P_SPORT, x, _RFS)
u16 per = BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM);
u16 gpio = P_IDENT(BFIN_SPORT_RFS(CONFIG_SND_BF5XX_SPORT_NUM));
pr_debug("%s enter\n", __func__);
peripheral_free(per);
gpio_request(gpio, "bf5xx-ac97");
gpio_direction_output(gpio, 1);
udelay(2);
gpio_set_value(gpio, 0);
udelay(1);
gpio_free(gpio);
peripheral_request(per, "soc-audio");
#else
pr_info("%s: Not implemented\n", __func__);
#endif
}
static void bf5xx_ac97_cold_reset(struct snd_ac97 *ac97)
{
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
pr_debug("%s enter\n", __func__);
/* It is specified for bf548-ezkit */
gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 0);
/* Keep reset pin low for 1 ms */
mdelay(1);
gpio_set_value(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
/* Wait for bit clock recover */
mdelay(1);
#else
pr_info("%s: Not implemented\n", __func__);
#endif
}
struct snd_ac97_bus_ops soc_ac97_ops = {
.read = bf5xx_ac97_read,
.write = bf5xx_ac97_write,
.warm_reset = bf5xx_ac97_warm_reset,
.reset = bf5xx_ac97_cold_reset,
};
EXPORT_SYMBOL_GPL(soc_ac97_ops);
#ifdef CONFIG_PM
static int bf5xx_ac97_suspend(struct snd_soc_dai *dai)
{
struct sport_device *sport =
(struct sport_device *)dai->private_data;
pr_debug("%s : sport %d\n", __func__, dai->id);
if (!dai->active)
return 0;
if (dai->capture.active)
sport_rx_stop(sport);
if (dai->playback.active)
sport_tx_stop(sport);
return 0;
}
static int bf5xx_ac97_resume(struct snd_soc_dai *dai)
{
int ret;
struct sport_device *sport =
(struct sport_device *)dai->private_data;
pr_debug("%s : sport %d\n", __func__, dai->id);
if (!dai->active)
return 0;
ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
if (ret) {
pr_err("SPORT is busy!\n");
return -EBUSY;
}
if (dai->capture.active)
sport_rx_start(sport);
if (dai->playback.active)
sport_tx_start(sport);
return 0;
}
#else
#define bf5xx_ac97_suspend NULL
#define bf5xx_ac97_resume NULL
#endif
static int bf5xx_ac97_probe(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
int ret = 0;
cmd_count = (int *)get_zeroed_page(GFP_KERNEL);
if (cmd_count == NULL)
return -ENOMEM;
if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
pr_err("Requesting Peripherals failed\n");
ret = -EFAULT;
goto peripheral_err;
}
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
/* Request PB3 as reset pin */
if (gpio_request(CONFIG_SND_BF5XX_RESET_GPIO_NUM, "SND_AD198x RESET")) {
pr_err("Failed to request GPIO_%d for reset\n",
CONFIG_SND_BF5XX_RESET_GPIO_NUM);
ret = -1;
goto gpio_err;
}
gpio_direction_output(CONFIG_SND_BF5XX_RESET_GPIO_NUM, 1);
#endif
sport_handle = sport_init(&sport_params[sport_num], 2, \
sizeof(struct ac97_frame), NULL);
if (!sport_handle) {
ret = -ENODEV;
goto sport_err;
}
/*SPORT works in TDM mode to simulate AC97 transfers*/
ret = sport_set_multichannel(sport_handle, 16, 0x1F, 1);
if (ret) {
pr_err("SPORT is busy!\n");
ret = -EBUSY;
goto sport_config_err;
}
ret = sport_config_rx(sport_handle, IRFS, 0xF, 0, (16*16-1));
if (ret) {
pr_err("SPORT is busy!\n");
ret = -EBUSY;
goto sport_config_err;
}
ret = sport_config_tx(sport_handle, ITFS, 0xF, 0, (16*16-1));
if (ret) {
pr_err("SPORT is busy!\n");
ret = -EBUSY;
goto sport_config_err;
}
return 0;
sport_config_err:
kfree(sport_handle);
sport_err:
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
#endif
gpio_err:
peripheral_free_list(&sport_req[sport_num][0]);
peripheral_err:
free_page((unsigned long)cmd_count);
cmd_count = NULL;
return ret;
}
static void bf5xx_ac97_remove(struct platform_device *pdev,
struct snd_soc_dai *dai)
{
free_page((unsigned long)cmd_count);
cmd_count = NULL;
peripheral_free_list(&sport_req[sport_num][0]);
#ifdef CONFIG_SND_BF5XX_HAVE_COLD_RESET
gpio_free(CONFIG_SND_BF5XX_RESET_GPIO_NUM);
#endif
}
struct snd_soc_dai bfin_ac97_dai = {
.name = "bf5xx-ac97",
.id = 0,
.ac97_control = 1,
.probe = bf5xx_ac97_probe,
.remove = bf5xx_ac97_remove,
.suspend = bf5xx_ac97_suspend,
.resume = bf5xx_ac97_resume,
.playback = {
.stream_name = "AC97 Playback",
.channels_min = 2,
#if defined(CONFIG_SND_BF5XX_MULTICHAN_SUPPORT)
.channels_max = 6,
#else
.channels_max = 2,
#endif
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE, },
.capture = {
.stream_name = "AC97 Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE, },
};
EXPORT_SYMBOL_GPL(bfin_ac97_dai);
static int __devinit bfin_ac97_init(void)
{
return snd_soc_register_dai(&bfin_ac97_dai);
}
module_init(bfin_ac97_init);
static void __exit bfin_ac97_exit(void)
{
snd_soc_unregister_dai(&bfin_ac97_dai);
}
module_exit(bfin_ac97_exit);
MODULE_AUTHOR("Roy Huang");
MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
MODULE_LICENSE("GPL");
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