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aha/sound/soc/blackfin/bf5xx-ac97.c
Mark Brown 3ba9e10a6d ASoC: Remove DAI type information 
DAI type information is only ever used within ASoC in order to special
case AC97 and for diagnostic purposes. Since modern CPUs and codecs
support multi function DAIs which can be configured for several modes
it is more trouble than it's worth to maintain anything other than a
flag identifying AC97 DAIs so remove the type field and replace it with
an ac97_control flag.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2008-11-24 18:01:31 +00:00

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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 platform_device *pdev,
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 platform_device *pdev,
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);
MODULE_AUTHOR("Roy Huang");
MODULE_DESCRIPTION("AC97 driver for ADI Blackfin");
MODULE_LICENSE("GPL");
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