mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 01:10:04 +00:00
![Bill Pemberton](/assets/img/avatar_default.png)
CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
1161 lines
26 KiB
C
1161 lines
26 KiB
C
/* sound/soc/samsung/i2s.c
|
|
*
|
|
* ALSA SoC Audio Layer - Samsung I2S Controller driver
|
|
*
|
|
* Copyright (c) 2010 Samsung Electronics Co. Ltd.
|
|
* Jaswinder Singh <jassisinghbrar@gmail.com>
|
|
*
|
|
* 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/delay.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/io.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pm_runtime.h>
|
|
|
|
#include <sound/soc.h>
|
|
#include <sound/pcm_params.h>
|
|
|
|
#include <linux/platform_data/asoc-s3c.h>
|
|
|
|
#include "dma.h"
|
|
#include "idma.h"
|
|
#include "i2s.h"
|
|
#include "i2s-regs.h"
|
|
|
|
#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
|
|
|
|
struct i2s_dai {
|
|
/* Platform device for this DAI */
|
|
struct platform_device *pdev;
|
|
/* IOREMAP'd SFRs */
|
|
void __iomem *addr;
|
|
/* Physical base address of SFRs */
|
|
u32 base;
|
|
/* Rate of RCLK source clock */
|
|
unsigned long rclk_srcrate;
|
|
/* Frame Clock */
|
|
unsigned frmclk;
|
|
/*
|
|
* Specifically requested RCLK,BCLK by MACHINE Driver.
|
|
* 0 indicates CPU driver is free to choose any value.
|
|
*/
|
|
unsigned rfs, bfs;
|
|
/* I2S Controller's core clock */
|
|
struct clk *clk;
|
|
/* Clock for generating I2S signals */
|
|
struct clk *op_clk;
|
|
/* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
|
|
struct i2s_dai *pri_dai;
|
|
/* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
|
|
struct i2s_dai *sec_dai;
|
|
#define DAI_OPENED (1 << 0) /* Dai is opened */
|
|
#define DAI_MANAGER (1 << 1) /* Dai is the manager */
|
|
unsigned mode;
|
|
/* Driver for this DAI */
|
|
struct snd_soc_dai_driver i2s_dai_drv;
|
|
/* DMA parameters */
|
|
struct s3c_dma_params dma_playback;
|
|
struct s3c_dma_params dma_capture;
|
|
struct s3c_dma_params idma_playback;
|
|
u32 quirks;
|
|
u32 suspend_i2smod;
|
|
u32 suspend_i2scon;
|
|
u32 suspend_i2spsr;
|
|
};
|
|
|
|
/* Lock for cross i/f checks */
|
|
static DEFINE_SPINLOCK(lock);
|
|
|
|
/* If this is the 'overlay' stereo DAI */
|
|
static inline bool is_secondary(struct i2s_dai *i2s)
|
|
{
|
|
return i2s->pri_dai ? true : false;
|
|
}
|
|
|
|
/* If operating in SoC-Slave mode */
|
|
static inline bool is_slave(struct i2s_dai *i2s)
|
|
{
|
|
return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
|
|
}
|
|
|
|
/* If this interface of the controller is transmitting data */
|
|
static inline bool tx_active(struct i2s_dai *i2s)
|
|
{
|
|
u32 active;
|
|
|
|
if (!i2s)
|
|
return false;
|
|
|
|
active = readl(i2s->addr + I2SCON);
|
|
|
|
if (is_secondary(i2s))
|
|
active &= CON_TXSDMA_ACTIVE;
|
|
else
|
|
active &= CON_TXDMA_ACTIVE;
|
|
|
|
return active ? true : false;
|
|
}
|
|
|
|
/* If the other interface of the controller is transmitting data */
|
|
static inline bool other_tx_active(struct i2s_dai *i2s)
|
|
{
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
|
|
return tx_active(other);
|
|
}
|
|
|
|
/* If any interface of the controller is transmitting data */
|
|
static inline bool any_tx_active(struct i2s_dai *i2s)
|
|
{
|
|
return tx_active(i2s) || other_tx_active(i2s);
|
|
}
|
|
|
|
/* If this interface of the controller is receiving data */
|
|
static inline bool rx_active(struct i2s_dai *i2s)
|
|
{
|
|
u32 active;
|
|
|
|
if (!i2s)
|
|
return false;
|
|
|
|
active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
|
|
|
|
return active ? true : false;
|
|
}
|
|
|
|
/* If the other interface of the controller is receiving data */
|
|
static inline bool other_rx_active(struct i2s_dai *i2s)
|
|
{
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
|
|
return rx_active(other);
|
|
}
|
|
|
|
/* If any interface of the controller is receiving data */
|
|
static inline bool any_rx_active(struct i2s_dai *i2s)
|
|
{
|
|
return rx_active(i2s) || other_rx_active(i2s);
|
|
}
|
|
|
|
/* If the other DAI is transmitting or receiving data */
|
|
static inline bool other_active(struct i2s_dai *i2s)
|
|
{
|
|
return other_rx_active(i2s) || other_tx_active(i2s);
|
|
}
|
|
|
|
/* If this DAI is transmitting or receiving data */
|
|
static inline bool this_active(struct i2s_dai *i2s)
|
|
{
|
|
return tx_active(i2s) || rx_active(i2s);
|
|
}
|
|
|
|
/* If the controller is active anyway */
|
|
static inline bool any_active(struct i2s_dai *i2s)
|
|
{
|
|
return this_active(i2s) || other_active(i2s);
|
|
}
|
|
|
|
static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
|
|
{
|
|
return snd_soc_dai_get_drvdata(dai);
|
|
}
|
|
|
|
static inline bool is_opened(struct i2s_dai *i2s)
|
|
{
|
|
if (i2s && (i2s->mode & DAI_OPENED))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
static inline bool is_manager(struct i2s_dai *i2s)
|
|
{
|
|
if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/* Read RCLK of I2S (in multiples of LRCLK) */
|
|
static inline unsigned get_rfs(struct i2s_dai *i2s)
|
|
{
|
|
u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
|
|
|
|
switch (rfs) {
|
|
case 3: return 768;
|
|
case 2: return 384;
|
|
case 1: return 512;
|
|
default: return 256;
|
|
}
|
|
}
|
|
|
|
/* Write RCLK of I2S (in multiples of LRCLK) */
|
|
static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
|
|
{
|
|
u32 mod = readl(i2s->addr + I2SMOD);
|
|
|
|
mod &= ~MOD_RCLK_MASK;
|
|
|
|
switch (rfs) {
|
|
case 768:
|
|
mod |= MOD_RCLK_768FS;
|
|
break;
|
|
case 512:
|
|
mod |= MOD_RCLK_512FS;
|
|
break;
|
|
case 384:
|
|
mod |= MOD_RCLK_384FS;
|
|
break;
|
|
default:
|
|
mod |= MOD_RCLK_256FS;
|
|
break;
|
|
}
|
|
|
|
writel(mod, i2s->addr + I2SMOD);
|
|
}
|
|
|
|
/* Read Bit-Clock of I2S (in multiples of LRCLK) */
|
|
static inline unsigned get_bfs(struct i2s_dai *i2s)
|
|
{
|
|
u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
|
|
|
|
switch (bfs) {
|
|
case 3: return 24;
|
|
case 2: return 16;
|
|
case 1: return 48;
|
|
default: return 32;
|
|
}
|
|
}
|
|
|
|
/* Write Bit-Clock of I2S (in multiples of LRCLK) */
|
|
static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
|
|
{
|
|
u32 mod = readl(i2s->addr + I2SMOD);
|
|
|
|
mod &= ~MOD_BCLK_MASK;
|
|
|
|
switch (bfs) {
|
|
case 48:
|
|
mod |= MOD_BCLK_48FS;
|
|
break;
|
|
case 32:
|
|
mod |= MOD_BCLK_32FS;
|
|
break;
|
|
case 24:
|
|
mod |= MOD_BCLK_24FS;
|
|
break;
|
|
case 16:
|
|
mod |= MOD_BCLK_16FS;
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
|
|
return;
|
|
}
|
|
|
|
writel(mod, i2s->addr + I2SMOD);
|
|
}
|
|
|
|
/* Sample-Size */
|
|
static inline int get_blc(struct i2s_dai *i2s)
|
|
{
|
|
int blc = readl(i2s->addr + I2SMOD);
|
|
|
|
blc = (blc >> 13) & 0x3;
|
|
|
|
switch (blc) {
|
|
case 2: return 24;
|
|
case 1: return 8;
|
|
default: return 16;
|
|
}
|
|
}
|
|
|
|
/* TX Channel Control */
|
|
static void i2s_txctrl(struct i2s_dai *i2s, int on)
|
|
{
|
|
void __iomem *addr = i2s->addr;
|
|
u32 con = readl(addr + I2SCON);
|
|
u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
|
|
|
|
if (on) {
|
|
con |= CON_ACTIVE;
|
|
con &= ~CON_TXCH_PAUSE;
|
|
|
|
if (is_secondary(i2s)) {
|
|
con |= CON_TXSDMA_ACTIVE;
|
|
con &= ~CON_TXSDMA_PAUSE;
|
|
} else {
|
|
con |= CON_TXDMA_ACTIVE;
|
|
con &= ~CON_TXDMA_PAUSE;
|
|
}
|
|
|
|
if (any_rx_active(i2s))
|
|
mod |= MOD_TXRX;
|
|
else
|
|
mod |= MOD_TXONLY;
|
|
} else {
|
|
if (is_secondary(i2s)) {
|
|
con |= CON_TXSDMA_PAUSE;
|
|
con &= ~CON_TXSDMA_ACTIVE;
|
|
} else {
|
|
con |= CON_TXDMA_PAUSE;
|
|
con &= ~CON_TXDMA_ACTIVE;
|
|
}
|
|
|
|
if (other_tx_active(i2s)) {
|
|
writel(con, addr + I2SCON);
|
|
return;
|
|
}
|
|
|
|
con |= CON_TXCH_PAUSE;
|
|
|
|
if (any_rx_active(i2s))
|
|
mod |= MOD_RXONLY;
|
|
else
|
|
con &= ~CON_ACTIVE;
|
|
}
|
|
|
|
writel(mod, addr + I2SMOD);
|
|
writel(con, addr + I2SCON);
|
|
}
|
|
|
|
/* RX Channel Control */
|
|
static void i2s_rxctrl(struct i2s_dai *i2s, int on)
|
|
{
|
|
void __iomem *addr = i2s->addr;
|
|
u32 con = readl(addr + I2SCON);
|
|
u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
|
|
|
|
if (on) {
|
|
con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
|
|
con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
|
|
|
|
if (any_tx_active(i2s))
|
|
mod |= MOD_TXRX;
|
|
else
|
|
mod |= MOD_RXONLY;
|
|
} else {
|
|
con |= CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
|
|
con &= ~CON_RXDMA_ACTIVE;
|
|
|
|
if (any_tx_active(i2s))
|
|
mod |= MOD_TXONLY;
|
|
else
|
|
con &= ~CON_ACTIVE;
|
|
}
|
|
|
|
writel(mod, addr + I2SMOD);
|
|
writel(con, addr + I2SCON);
|
|
}
|
|
|
|
/* Flush FIFO of an interface */
|
|
static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
|
|
{
|
|
void __iomem *fic;
|
|
u32 val;
|
|
|
|
if (!i2s)
|
|
return;
|
|
|
|
if (is_secondary(i2s))
|
|
fic = i2s->addr + I2SFICS;
|
|
else
|
|
fic = i2s->addr + I2SFIC;
|
|
|
|
/* Flush the FIFO */
|
|
writel(readl(fic) | flush, fic);
|
|
|
|
/* Be patient */
|
|
val = msecs_to_loops(1) / 1000; /* 1 usec */
|
|
while (--val)
|
|
cpu_relax();
|
|
|
|
writel(readl(fic) & ~flush, fic);
|
|
}
|
|
|
|
static int i2s_set_sysclk(struct snd_soc_dai *dai,
|
|
int clk_id, unsigned int rfs, int dir)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
u32 mod = readl(i2s->addr + I2SMOD);
|
|
|
|
switch (clk_id) {
|
|
case SAMSUNG_I2S_CDCLK:
|
|
/* Shouldn't matter in GATING(CLOCK_IN) mode */
|
|
if (dir == SND_SOC_CLOCK_IN)
|
|
rfs = 0;
|
|
|
|
if ((rfs && other->rfs && (other->rfs != rfs)) ||
|
|
(any_active(i2s) &&
|
|
(((dir == SND_SOC_CLOCK_IN)
|
|
&& !(mod & MOD_CDCLKCON)) ||
|
|
((dir == SND_SOC_CLOCK_OUT)
|
|
&& (mod & MOD_CDCLKCON))))) {
|
|
dev_err(&i2s->pdev->dev,
|
|
"%s:%d Other DAI busy\n", __func__, __LINE__);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (dir == SND_SOC_CLOCK_IN)
|
|
mod |= MOD_CDCLKCON;
|
|
else
|
|
mod &= ~MOD_CDCLKCON;
|
|
|
|
i2s->rfs = rfs;
|
|
break;
|
|
|
|
case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
|
|
case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
|
|
if ((i2s->quirks & QUIRK_NO_MUXPSR)
|
|
|| (clk_id == SAMSUNG_I2S_RCLKSRC_0))
|
|
clk_id = 0;
|
|
else
|
|
clk_id = 1;
|
|
|
|
if (!any_active(i2s)) {
|
|
if (i2s->op_clk) {
|
|
if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
|
|
(!clk_id && (mod & MOD_IMS_SYSMUX))) {
|
|
clk_disable_unprepare(i2s->op_clk);
|
|
clk_put(i2s->op_clk);
|
|
} else {
|
|
i2s->rclk_srcrate =
|
|
clk_get_rate(i2s->op_clk);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (clk_id)
|
|
i2s->op_clk = clk_get(&i2s->pdev->dev,
|
|
"i2s_opclk1");
|
|
else
|
|
i2s->op_clk = clk_get(&i2s->pdev->dev,
|
|
"i2s_opclk0");
|
|
clk_prepare_enable(i2s->op_clk);
|
|
i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
|
|
|
|
/* Over-ride the other's */
|
|
if (other) {
|
|
other->op_clk = i2s->op_clk;
|
|
other->rclk_srcrate = i2s->rclk_srcrate;
|
|
}
|
|
} else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
|
|
|| (clk_id && !(mod & MOD_IMS_SYSMUX))) {
|
|
dev_err(&i2s->pdev->dev,
|
|
"%s:%d Other DAI busy\n", __func__, __LINE__);
|
|
return -EAGAIN;
|
|
} else {
|
|
/* Call can't be on the active DAI */
|
|
i2s->op_clk = other->op_clk;
|
|
i2s->rclk_srcrate = other->rclk_srcrate;
|
|
return 0;
|
|
}
|
|
|
|
if (clk_id == 0)
|
|
mod &= ~MOD_IMS_SYSMUX;
|
|
else
|
|
mod |= MOD_IMS_SYSMUX;
|
|
break;
|
|
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "We don't serve that!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
writel(mod, i2s->addr + I2SMOD);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i2s_set_fmt(struct snd_soc_dai *dai,
|
|
unsigned int fmt)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
u32 mod = readl(i2s->addr + I2SMOD);
|
|
u32 tmp = 0;
|
|
|
|
/* Format is priority */
|
|
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_RIGHT_J:
|
|
tmp |= MOD_LR_RLOW;
|
|
tmp |= MOD_SDF_MSB;
|
|
break;
|
|
case SND_SOC_DAIFMT_LEFT_J:
|
|
tmp |= MOD_LR_RLOW;
|
|
tmp |= MOD_SDF_LSB;
|
|
break;
|
|
case SND_SOC_DAIFMT_I2S:
|
|
tmp |= MOD_SDF_IIS;
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "Format not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* INV flag is relative to the FORMAT flag - if set it simply
|
|
* flips the polarity specified by the Standard
|
|
*/
|
|
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
|
|
case SND_SOC_DAIFMT_NB_NF:
|
|
break;
|
|
case SND_SOC_DAIFMT_NB_IF:
|
|
if (tmp & MOD_LR_RLOW)
|
|
tmp &= ~MOD_LR_RLOW;
|
|
else
|
|
tmp |= MOD_LR_RLOW;
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "Polarity not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
|
|
case SND_SOC_DAIFMT_CBM_CFM:
|
|
tmp |= MOD_SLAVE;
|
|
break;
|
|
case SND_SOC_DAIFMT_CBS_CFS:
|
|
/* Set default source clock in Master mode */
|
|
if (i2s->rclk_srcrate == 0)
|
|
i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
|
|
0, SND_SOC_CLOCK_IN);
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (any_active(i2s) &&
|
|
((mod & (MOD_SDF_MASK | MOD_LR_RLOW
|
|
| MOD_SLAVE)) != tmp)) {
|
|
dev_err(&i2s->pdev->dev,
|
|
"%s:%d Other DAI busy\n", __func__, __LINE__);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
|
|
mod |= tmp;
|
|
writel(mod, i2s->addr + I2SMOD);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i2s_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
u32 mod = readl(i2s->addr + I2SMOD);
|
|
|
|
if (!is_secondary(i2s))
|
|
mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
|
|
|
|
switch (params_channels(params)) {
|
|
case 6:
|
|
mod |= MOD_DC2_EN;
|
|
case 4:
|
|
mod |= MOD_DC1_EN;
|
|
break;
|
|
case 2:
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
i2s->dma_playback.dma_size = 4;
|
|
else
|
|
i2s->dma_capture.dma_size = 4;
|
|
break;
|
|
case 1:
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
i2s->dma_playback.dma_size = 2;
|
|
else
|
|
i2s->dma_capture.dma_size = 2;
|
|
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "%d channels not supported\n",
|
|
params_channels(params));
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (is_secondary(i2s))
|
|
mod &= ~MOD_BLCS_MASK;
|
|
else
|
|
mod &= ~MOD_BLCP_MASK;
|
|
|
|
if (is_manager(i2s))
|
|
mod &= ~MOD_BLC_MASK;
|
|
|
|
switch (params_format(params)) {
|
|
case SNDRV_PCM_FORMAT_S8:
|
|
if (is_secondary(i2s))
|
|
mod |= MOD_BLCS_8BIT;
|
|
else
|
|
mod |= MOD_BLCP_8BIT;
|
|
if (is_manager(i2s))
|
|
mod |= MOD_BLC_8BIT;
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S16_LE:
|
|
if (is_secondary(i2s))
|
|
mod |= MOD_BLCS_16BIT;
|
|
else
|
|
mod |= MOD_BLCP_16BIT;
|
|
if (is_manager(i2s))
|
|
mod |= MOD_BLC_16BIT;
|
|
break;
|
|
case SNDRV_PCM_FORMAT_S24_LE:
|
|
if (is_secondary(i2s))
|
|
mod |= MOD_BLCS_24BIT;
|
|
else
|
|
mod |= MOD_BLCP_24BIT;
|
|
if (is_manager(i2s))
|
|
mod |= MOD_BLC_24BIT;
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
|
|
params_format(params));
|
|
return -EINVAL;
|
|
}
|
|
writel(mod, i2s->addr + I2SMOD);
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
snd_soc_dai_set_dma_data(dai, substream,
|
|
(void *)&i2s->dma_playback);
|
|
else
|
|
snd_soc_dai_set_dma_data(dai, substream,
|
|
(void *)&i2s->dma_capture);
|
|
|
|
i2s->frmclk = params_rate(params);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* We set constraints on the substream acc to the version of I2S */
|
|
static int i2s_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lock, flags);
|
|
|
|
i2s->mode |= DAI_OPENED;
|
|
|
|
if (is_manager(other))
|
|
i2s->mode &= ~DAI_MANAGER;
|
|
else
|
|
i2s->mode |= DAI_MANAGER;
|
|
|
|
/* Enforce set_sysclk in Master mode */
|
|
i2s->rclk_srcrate = 0;
|
|
|
|
spin_unlock_irqrestore(&lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void i2s_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lock, flags);
|
|
|
|
i2s->mode &= ~DAI_OPENED;
|
|
i2s->mode &= ~DAI_MANAGER;
|
|
|
|
if (is_opened(other))
|
|
other->mode |= DAI_MANAGER;
|
|
|
|
/* Reset any constraint on RFS and BFS */
|
|
i2s->rfs = 0;
|
|
i2s->bfs = 0;
|
|
|
|
spin_unlock_irqrestore(&lock, flags);
|
|
|
|
/* Gate CDCLK by default */
|
|
if (!is_opened(other))
|
|
i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
|
|
0, SND_SOC_CLOCK_IN);
|
|
}
|
|
|
|
static int config_setup(struct i2s_dai *i2s)
|
|
{
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
unsigned rfs, bfs, blc;
|
|
u32 psr;
|
|
|
|
blc = get_blc(i2s);
|
|
|
|
bfs = i2s->bfs;
|
|
|
|
if (!bfs && other)
|
|
bfs = other->bfs;
|
|
|
|
/* Select least possible multiple(2) if no constraint set */
|
|
if (!bfs)
|
|
bfs = blc * 2;
|
|
|
|
rfs = i2s->rfs;
|
|
|
|
if (!rfs && other)
|
|
rfs = other->rfs;
|
|
|
|
if ((rfs == 256 || rfs == 512) && (blc == 24)) {
|
|
dev_err(&i2s->pdev->dev,
|
|
"%d-RFS not supported for 24-blc\n", rfs);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!rfs) {
|
|
if (bfs == 16 || bfs == 32)
|
|
rfs = 256;
|
|
else
|
|
rfs = 384;
|
|
}
|
|
|
|
/* If already setup and running */
|
|
if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
|
|
dev_err(&i2s->pdev->dev,
|
|
"%s:%d Other DAI busy\n", __func__, __LINE__);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
/* Don't bother RFS, BFS & PSR in Slave mode */
|
|
if (is_slave(i2s))
|
|
return 0;
|
|
|
|
set_bfs(i2s, bfs);
|
|
set_rfs(i2s, rfs);
|
|
|
|
if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
|
|
psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
|
|
writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
|
|
dev_dbg(&i2s->pdev->dev,
|
|
"RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
|
|
i2s->rclk_srcrate, psr, rfs, bfs);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i2s_trigger(struct snd_pcm_substream *substream,
|
|
int cmd, struct snd_soc_dai *dai)
|
|
{
|
|
int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct i2s_dai *i2s = to_info(rtd->cpu_dai);
|
|
unsigned long flags;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
local_irq_save(flags);
|
|
|
|
if (config_setup(i2s)) {
|
|
local_irq_restore(flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (capture)
|
|
i2s_rxctrl(i2s, 1);
|
|
else
|
|
i2s_txctrl(i2s, 1);
|
|
|
|
local_irq_restore(flags);
|
|
break;
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
local_irq_save(flags);
|
|
|
|
if (capture) {
|
|
i2s_rxctrl(i2s, 0);
|
|
i2s_fifo(i2s, FIC_RXFLUSH);
|
|
} else {
|
|
i2s_txctrl(i2s, 0);
|
|
i2s_fifo(i2s, FIC_TXFLUSH);
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i2s_set_clkdiv(struct snd_soc_dai *dai,
|
|
int div_id, int div)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
|
|
switch (div_id) {
|
|
case SAMSUNG_I2S_DIV_BCLK:
|
|
if ((any_active(i2s) && div && (get_bfs(i2s) != div))
|
|
|| (other && other->bfs && (other->bfs != div))) {
|
|
dev_err(&i2s->pdev->dev,
|
|
"%s:%d Other DAI busy\n", __func__, __LINE__);
|
|
return -EAGAIN;
|
|
}
|
|
i2s->bfs = div;
|
|
break;
|
|
default:
|
|
dev_err(&i2s->pdev->dev,
|
|
"Invalid clock divider(%d)\n", div_id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_sframes_t
|
|
i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
u32 reg = readl(i2s->addr + I2SFIC);
|
|
snd_pcm_sframes_t delay;
|
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
delay = FIC_RXCOUNT(reg);
|
|
else if (is_secondary(i2s))
|
|
delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
|
|
else
|
|
delay = FIC_TXCOUNT(reg);
|
|
|
|
return delay;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int i2s_suspend(struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
|
|
if (dai->active) {
|
|
i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
|
|
i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
|
|
i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int i2s_resume(struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
|
|
if (dai->active) {
|
|
writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
|
|
writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
|
|
writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define i2s_suspend NULL
|
|
#define i2s_resume NULL
|
|
#endif
|
|
|
|
static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = to_info(dai);
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
|
|
if (other && other->clk) /* If this is probe on secondary */
|
|
goto probe_exit;
|
|
|
|
i2s->addr = ioremap(i2s->base, 0x100);
|
|
if (i2s->addr == NULL) {
|
|
dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
i2s->clk = clk_get(&i2s->pdev->dev, "iis");
|
|
if (IS_ERR(i2s->clk)) {
|
|
dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
|
|
iounmap(i2s->addr);
|
|
return -ENOENT;
|
|
}
|
|
clk_prepare_enable(i2s->clk);
|
|
|
|
if (other) {
|
|
other->addr = i2s->addr;
|
|
other->clk = i2s->clk;
|
|
}
|
|
|
|
if (i2s->quirks & QUIRK_NEED_RSTCLR)
|
|
writel(CON_RSTCLR, i2s->addr + I2SCON);
|
|
|
|
if (i2s->quirks & QUIRK_SEC_DAI)
|
|
idma_reg_addr_init(i2s->addr,
|
|
i2s->sec_dai->idma_playback.dma_addr);
|
|
|
|
probe_exit:
|
|
/* Reset any constraint on RFS and BFS */
|
|
i2s->rfs = 0;
|
|
i2s->bfs = 0;
|
|
i2s_txctrl(i2s, 0);
|
|
i2s_rxctrl(i2s, 0);
|
|
i2s_fifo(i2s, FIC_TXFLUSH);
|
|
i2s_fifo(other, FIC_TXFLUSH);
|
|
i2s_fifo(i2s, FIC_RXFLUSH);
|
|
|
|
/* Gate CDCLK by default */
|
|
if (!is_opened(other))
|
|
i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
|
|
0, SND_SOC_CLOCK_IN);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
|
|
{
|
|
struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
|
|
struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
|
|
|
|
if (!other || !other->clk) {
|
|
|
|
if (i2s->quirks & QUIRK_NEED_RSTCLR)
|
|
writel(0, i2s->addr + I2SCON);
|
|
|
|
clk_disable_unprepare(i2s->clk);
|
|
clk_put(i2s->clk);
|
|
|
|
iounmap(i2s->addr);
|
|
}
|
|
|
|
i2s->clk = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
|
|
.trigger = i2s_trigger,
|
|
.hw_params = i2s_hw_params,
|
|
.set_fmt = i2s_set_fmt,
|
|
.set_clkdiv = i2s_set_clkdiv,
|
|
.set_sysclk = i2s_set_sysclk,
|
|
.startup = i2s_startup,
|
|
.shutdown = i2s_shutdown,
|
|
.delay = i2s_delay,
|
|
};
|
|
|
|
#define SAMSUNG_I2S_RATES SNDRV_PCM_RATE_8000_96000
|
|
|
|
#define SAMSUNG_I2S_FMTS (SNDRV_PCM_FMTBIT_S8 | \
|
|
SNDRV_PCM_FMTBIT_S16_LE | \
|
|
SNDRV_PCM_FMTBIT_S24_LE)
|
|
|
|
static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
|
|
{
|
|
struct i2s_dai *i2s;
|
|
|
|
i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
|
|
if (i2s == NULL)
|
|
return NULL;
|
|
|
|
i2s->pdev = pdev;
|
|
i2s->pri_dai = NULL;
|
|
i2s->sec_dai = NULL;
|
|
i2s->i2s_dai_drv.symmetric_rates = 1;
|
|
i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
|
|
i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
|
|
i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
|
|
i2s->i2s_dai_drv.suspend = i2s_suspend;
|
|
i2s->i2s_dai_drv.resume = i2s_resume;
|
|
i2s->i2s_dai_drv.playback.channels_min = 2;
|
|
i2s->i2s_dai_drv.playback.channels_max = 2;
|
|
i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
|
|
i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
|
|
|
|
if (!sec) {
|
|
i2s->i2s_dai_drv.capture.channels_min = 1;
|
|
i2s->i2s_dai_drv.capture.channels_max = 2;
|
|
i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
|
|
i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
|
|
} else { /* Create a new platform_device for Secondary */
|
|
i2s->pdev = platform_device_register_resndata(NULL,
|
|
pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
|
|
NULL, 0, NULL, 0);
|
|
if (IS_ERR(i2s->pdev))
|
|
return NULL;
|
|
}
|
|
|
|
/* Pre-assign snd_soc_dai_set_drvdata */
|
|
dev_set_drvdata(&i2s->pdev->dev, i2s);
|
|
|
|
return i2s;
|
|
}
|
|
|
|
static int samsung_i2s_probe(struct platform_device *pdev)
|
|
{
|
|
u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
|
|
struct i2s_dai *pri_dai, *sec_dai = NULL;
|
|
struct s3c_audio_pdata *i2s_pdata;
|
|
struct samsung_i2s *i2s_cfg;
|
|
struct resource *res;
|
|
u32 regs_base, quirks;
|
|
int ret = 0;
|
|
|
|
/* Call during Seconday interface registration */
|
|
if (pdev->id >= SAMSUNG_I2S_SECOFF) {
|
|
sec_dai = dev_get_drvdata(&pdev->dev);
|
|
snd_soc_register_dai(&sec_dai->pdev->dev,
|
|
&sec_dai->i2s_dai_drv);
|
|
asoc_dma_platform_register(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
i2s_pdata = pdev->dev.platform_data;
|
|
if (i2s_pdata == NULL) {
|
|
dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
|
|
return -ENXIO;
|
|
}
|
|
dma_pl_chan = res->start;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
|
|
return -ENXIO;
|
|
}
|
|
dma_cp_chan = res->start;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
|
|
if (res)
|
|
dma_pl_sec_chan = res->start;
|
|
else
|
|
dma_pl_sec_chan = 0;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
if (!request_mem_region(res->start, resource_size(res),
|
|
"samsung-i2s")) {
|
|
dev_err(&pdev->dev, "Unable to request SFR region\n");
|
|
return -EBUSY;
|
|
}
|
|
regs_base = res->start;
|
|
|
|
i2s_cfg = &i2s_pdata->type.i2s;
|
|
quirks = i2s_cfg->quirks;
|
|
|
|
pri_dai = i2s_alloc_dai(pdev, false);
|
|
if (!pri_dai) {
|
|
dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
|
|
pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
|
|
pri_dai->dma_playback.client =
|
|
(struct s3c2410_dma_client *)&pri_dai->dma_playback;
|
|
pri_dai->dma_capture.client =
|
|
(struct s3c2410_dma_client *)&pri_dai->dma_capture;
|
|
pri_dai->dma_playback.channel = dma_pl_chan;
|
|
pri_dai->dma_capture.channel = dma_cp_chan;
|
|
pri_dai->dma_playback.dma_size = 4;
|
|
pri_dai->dma_capture.dma_size = 4;
|
|
pri_dai->base = regs_base;
|
|
pri_dai->quirks = quirks;
|
|
|
|
if (quirks & QUIRK_PRI_6CHAN)
|
|
pri_dai->i2s_dai_drv.playback.channels_max = 6;
|
|
|
|
if (quirks & QUIRK_SEC_DAI) {
|
|
sec_dai = i2s_alloc_dai(pdev, true);
|
|
if (!sec_dai) {
|
|
dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
|
|
sec_dai->dma_playback.client =
|
|
(struct s3c2410_dma_client *)&sec_dai->dma_playback;
|
|
/* Use iDMA always if SysDMA not provided */
|
|
sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
|
|
sec_dai->dma_playback.dma_size = 4;
|
|
sec_dai->base = regs_base;
|
|
sec_dai->quirks = quirks;
|
|
sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr;
|
|
sec_dai->pri_dai = pri_dai;
|
|
pri_dai->sec_dai = sec_dai;
|
|
}
|
|
|
|
if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
|
|
dev_err(&pdev->dev, "Unable to configure gpio\n");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
asoc_dma_platform_register(&pdev->dev);
|
|
|
|
return 0;
|
|
err:
|
|
release_mem_region(regs_base, resource_size(res));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int samsung_i2s_remove(struct platform_device *pdev)
|
|
{
|
|
struct i2s_dai *i2s, *other;
|
|
struct resource *res;
|
|
|
|
i2s = dev_get_drvdata(&pdev->dev);
|
|
other = i2s->pri_dai ? : i2s->sec_dai;
|
|
|
|
if (other) {
|
|
other->pri_dai = NULL;
|
|
other->sec_dai = NULL;
|
|
} else {
|
|
pm_runtime_disable(&pdev->dev);
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (res)
|
|
release_mem_region(res->start, resource_size(res));
|
|
}
|
|
|
|
i2s->pri_dai = NULL;
|
|
i2s->sec_dai = NULL;
|
|
|
|
asoc_dma_platform_unregister(&pdev->dev);
|
|
snd_soc_unregister_dai(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver samsung_i2s_driver = {
|
|
.probe = samsung_i2s_probe,
|
|
.remove = samsung_i2s_remove,
|
|
.driver = {
|
|
.name = "samsung-i2s",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(samsung_i2s_driver);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
|
|
MODULE_DESCRIPTION("Samsung I2S Interface");
|
|
MODULE_ALIAS("platform:samsung-i2s");
|
|
MODULE_LICENSE("GPL");
|