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linux/sound/soc/ux500/mop500_ab8500.c
Rajan Vaja 72f0095e79 ASoC: mop500_ab8500: Add a NULL pointer check in mop500_ab8500_machine_init() 
Avoid possible crash (NULL pointer dereference) by making
sure that dem_kzalloc() is successful.

Signed-off-by: Rajan Vaja <rajan.vaja@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-05-21 12:05:48 +01:00

448 lines
11 KiB
C
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/*
* Copyright (C) ST-Ericsson SA 2012
*
* Author: Ola Lilja <ola.o.lilja@stericsson.com>,
* Kristoffer Karlsson <kristoffer.karlsson@stericsson.com>
* for ST-Ericsson.
*
* License terms:
*
* 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/module.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "ux500_pcm.h"
#include "ux500_msp_dai.h"
#include "mop500_ab8500.h"
#include "../codecs/ab8500-codec.h"
#define TX_SLOT_MONO 0x0008
#define TX_SLOT_STEREO 0x000a
#define RX_SLOT_MONO 0x0001
#define RX_SLOT_STEREO 0x0003
#define TX_SLOT_8CH 0x00FF
#define RX_SLOT_8CH 0x00FF
#define DEF_TX_SLOTS TX_SLOT_STEREO
#define DEF_RX_SLOTS RX_SLOT_MONO
#define DRIVERMODE_NORMAL 0
#define DRIVERMODE_CODEC_ONLY 1
/* Slot configuration */
static unsigned int tx_slots = DEF_TX_SLOTS;
static unsigned int rx_slots = DEF_RX_SLOTS;
/* Configuration consistency parameters */
static DEFINE_MUTEX(mop500_ab8500_params_lock);
static unsigned long mop500_ab8500_usage;
static int mop500_ab8500_rate;
static int mop500_ab8500_channels;
/* Clocks */
static const char * const enum_mclk[] = {
"SYSCLK",
"ULPCLK"
};
enum mclk {
MCLK_SYSCLK,
MCLK_ULPCLK,
};
static SOC_ENUM_SINGLE_EXT_DECL(soc_enum_mclk, enum_mclk);
/* Private data for machine-part MOP500<->AB8500 */
struct mop500_ab8500_drvdata {
/* Clocks */
enum mclk mclk_sel;
struct clk *clk_ptr_intclk;
struct clk *clk_ptr_sysclk;
struct clk *clk_ptr_ulpclk;
};
static inline const char *get_mclk_str(enum mclk mclk_sel)
{
switch (mclk_sel) {
case MCLK_SYSCLK:
return "SYSCLK";
case MCLK_ULPCLK:
return "ULPCLK";
default:
return "Unknown";
}
}
static int mop500_ab8500_set_mclk(struct device *dev,
struct mop500_ab8500_drvdata *drvdata)
{
int status;
struct clk *clk_ptr;
if (IS_ERR(drvdata->clk_ptr_intclk)) {
dev_err(dev,
"%s: ERROR: intclk not initialized!\n", __func__);
return -EIO;
}
switch (drvdata->mclk_sel) {
case MCLK_SYSCLK:
clk_ptr = drvdata->clk_ptr_sysclk;
break;
case MCLK_ULPCLK:
clk_ptr = drvdata->clk_ptr_ulpclk;
break;
default:
return -EINVAL;
}
if (IS_ERR(clk_ptr)) {
dev_err(dev, "%s: ERROR: %s not initialized!\n", __func__,
get_mclk_str(drvdata->mclk_sel));
return -EIO;
}
status = clk_set_parent(drvdata->clk_ptr_intclk, clk_ptr);
if (status)
dev_err(dev,
"%s: ERROR: Setting intclk parent to %s failed (ret = %d)!",
__func__, get_mclk_str(drvdata->mclk_sel), status);
else
dev_dbg(dev,
"%s: intclk parent changed to %s.\n",
__func__, get_mclk_str(drvdata->mclk_sel));
return status;
}
/*
* Control-events
*/
static int mclk_input_control_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
struct mop500_ab8500_drvdata *drvdata =
snd_soc_card_get_drvdata(card);
ucontrol->value.enumerated.item[0] = drvdata->mclk_sel;
return 0;
}
static int mclk_input_control_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
struct mop500_ab8500_drvdata *drvdata =
snd_soc_card_get_drvdata(card);
unsigned int val = ucontrol->value.enumerated.item[0];
if (val > (unsigned int)MCLK_ULPCLK)
return -EINVAL;
if (drvdata->mclk_sel == val)
return 0;
drvdata->mclk_sel = val;
return 1;
}
/*
* Controls
*/
static struct snd_kcontrol_new mop500_ab8500_ctrls[] = {
SOC_ENUM_EXT("Master Clock Select",
soc_enum_mclk,
mclk_input_control_get, mclk_input_control_put),
SOC_DAPM_PIN_SWITCH("Headset Left"),
SOC_DAPM_PIN_SWITCH("Headset Right"),
SOC_DAPM_PIN_SWITCH("Earpiece"),
SOC_DAPM_PIN_SWITCH("Speaker Left"),
SOC_DAPM_PIN_SWITCH("Speaker Right"),
SOC_DAPM_PIN_SWITCH("LineOut Left"),
SOC_DAPM_PIN_SWITCH("LineOut Right"),
SOC_DAPM_PIN_SWITCH("Vibra 1"),
SOC_DAPM_PIN_SWITCH("Vibra 2"),
SOC_DAPM_PIN_SWITCH("Mic 1"),
SOC_DAPM_PIN_SWITCH("Mic 2"),
SOC_DAPM_PIN_SWITCH("LineIn Left"),
SOC_DAPM_PIN_SWITCH("LineIn Right"),
SOC_DAPM_PIN_SWITCH("DMic 1"),
SOC_DAPM_PIN_SWITCH("DMic 2"),
SOC_DAPM_PIN_SWITCH("DMic 3"),
SOC_DAPM_PIN_SWITCH("DMic 4"),
SOC_DAPM_PIN_SWITCH("DMic 5"),
SOC_DAPM_PIN_SWITCH("DMic 6"),
};
/* ASoC */
static int mop500_ab8500_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
/* Set audio-clock source */
return mop500_ab8500_set_mclk(rtd->card->dev,
snd_soc_card_get_drvdata(rtd->card));
}
static void mop500_ab8500_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct device *dev = rtd->card->dev;
dev_dbg(dev, "%s: Enter\n", __func__);
/* Reset slots configuration to default(s) */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
tx_slots = DEF_TX_SLOTS;
else
rx_slots = DEF_RX_SLOTS;
}
static int mop500_ab8500_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct device *dev = rtd->card->dev;
unsigned int fmt;
int channels, ret = 0, driver_mode, slots;
unsigned int sw_codec, sw_cpu;
bool is_playback;
dev_dbg(dev, "%s: Enter\n", __func__);
dev_dbg(dev, "%s: substream->pcm->name = %s\n"
"substream->pcm->id = %s.\n"
"substream->name = %s.\n"
"substream->number = %d.\n",
__func__,
substream->pcm->name,
substream->pcm->id,
substream->name,
substream->number);
/* Ensure configuration consistency between DAIs */
mutex_lock(&mop500_ab8500_params_lock);
if (mop500_ab8500_usage) {
if (mop500_ab8500_rate != params_rate(params) ||
mop500_ab8500_channels != params_channels(params)) {
mutex_unlock(&mop500_ab8500_params_lock);
return -EBUSY;
}
} else {
mop500_ab8500_rate = params_rate(params);
mop500_ab8500_channels = params_channels(params);
}
__set_bit(cpu_dai->id, &mop500_ab8500_usage);
mutex_unlock(&mop500_ab8500_params_lock);
channels = params_channels(params);
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S32_LE:
sw_cpu = 32;
break;
case SNDRV_PCM_FORMAT_S16_LE:
sw_cpu = 16;
break;
default:
return -EINVAL;
}
/* Setup codec depending on driver-mode */
if (channels == 8)
driver_mode = DRIVERMODE_CODEC_ONLY;
else
driver_mode = DRIVERMODE_NORMAL;
dev_dbg(dev, "%s: Driver-mode: %s.\n", __func__,
(driver_mode == DRIVERMODE_NORMAL) ? "NORMAL" : "CODEC_ONLY");
/* Setup format */
if (driver_mode == DRIVERMODE_NORMAL) {
fmt = SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CONT;
} else {
fmt = SND_SOC_DAIFMT_DSP_A |
SND_SOC_DAIFMT_CBM_CFM |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_GATED;
}
ret = snd_soc_runtime_set_dai_fmt(rtd, fmt);
if (ret)
return ret;
/* Setup TDM-slots */
is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
switch (channels) {
case 1:
slots = 16;
tx_slots = (is_playback) ? TX_SLOT_MONO : 0;
rx_slots = (is_playback) ? 0 : RX_SLOT_MONO;
break;
case 2:
slots = 16;
tx_slots = (is_playback) ? TX_SLOT_STEREO : 0;
rx_slots = (is_playback) ? 0 : RX_SLOT_STEREO;
break;
case 8:
slots = 16;
tx_slots = (is_playback) ? TX_SLOT_8CH : 0;
rx_slots = (is_playback) ? 0 : RX_SLOT_8CH;
break;
default:
return -EINVAL;
}
if (driver_mode == DRIVERMODE_NORMAL)
sw_codec = sw_cpu;
else
sw_codec = 20;
dev_dbg(dev, "%s: CPU-DAI TDM: TX=0x%04X RX=0x%04x\n", __func__,
tx_slots, rx_slots);
ret = snd_soc_dai_set_tdm_slot(cpu_dai, tx_slots, rx_slots, slots,
sw_cpu);
if (ret)
return ret;
dev_dbg(dev, "%s: CODEC-DAI TDM: TX=0x%04X RX=0x%04x\n", __func__,
tx_slots, rx_slots);
ret = snd_soc_dai_set_tdm_slot(codec_dai, tx_slots, rx_slots, slots,
sw_codec);
if (ret)
return ret;
return 0;
}
static int mop500_ab8500_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
mutex_lock(&mop500_ab8500_params_lock);
__clear_bit(cpu_dai->id, &mop500_ab8500_usage);
mutex_unlock(&mop500_ab8500_params_lock);
return 0;
}
struct snd_soc_ops mop500_ab8500_ops[] = {
{
.hw_params = mop500_ab8500_hw_params,
.hw_free = mop500_ab8500_hw_free,
.startup = mop500_ab8500_startup,
.shutdown = mop500_ab8500_shutdown,
}
};
int mop500_ab8500_machine_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
struct device *dev = rtd->card->dev;
struct mop500_ab8500_drvdata *drvdata;
int ret;
dev_dbg(dev, "%s Enter.\n", __func__);
/* Create driver private-data struct */
drvdata = devm_kzalloc(dev, sizeof(struct mop500_ab8500_drvdata),
GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
snd_soc_card_set_drvdata(rtd->card, drvdata);
/* Setup clocks */
drvdata->clk_ptr_sysclk = clk_get(dev, "sysclk");
if (IS_ERR(drvdata->clk_ptr_sysclk))
dev_warn(dev, "%s: WARNING: clk_get failed for 'sysclk'!\n",
__func__);
drvdata->clk_ptr_ulpclk = clk_get(dev, "ulpclk");
if (IS_ERR(drvdata->clk_ptr_ulpclk))
dev_warn(dev, "%s: WARNING: clk_get failed for 'ulpclk'!\n",
__func__);
drvdata->clk_ptr_intclk = clk_get(dev, "intclk");
if (IS_ERR(drvdata->clk_ptr_intclk))
dev_warn(dev, "%s: WARNING: clk_get failed for 'intclk'!\n",
__func__);
/* Set intclk default parent to ulpclk */
drvdata->mclk_sel = MCLK_ULPCLK;
ret = mop500_ab8500_set_mclk(dev, drvdata);
if (ret < 0)
dev_warn(dev, "%s: WARNING: mop500_ab8500_set_mclk!\n",
__func__);
drvdata->mclk_sel = MCLK_ULPCLK;
/* Add controls */
ret = snd_soc_add_card_controls(rtd->card, mop500_ab8500_ctrls,
ARRAY_SIZE(mop500_ab8500_ctrls));
if (ret < 0) {
pr_err("%s: Failed to add machine-controls (%d)!\n",
__func__, ret);
return ret;
}
ret = snd_soc_dapm_disable_pin(dapm, "Earpiece");
ret |= snd_soc_dapm_disable_pin(dapm, "Speaker Left");
ret |= snd_soc_dapm_disable_pin(dapm, "Speaker Right");
ret |= snd_soc_dapm_disable_pin(dapm, "LineOut Left");
ret |= snd_soc_dapm_disable_pin(dapm, "LineOut Right");
ret |= snd_soc_dapm_disable_pin(dapm, "Vibra 1");
ret |= snd_soc_dapm_disable_pin(dapm, "Vibra 2");
ret |= snd_soc_dapm_disable_pin(dapm, "Mic 1");
ret |= snd_soc_dapm_disable_pin(dapm, "Mic 2");
ret |= snd_soc_dapm_disable_pin(dapm, "LineIn Left");
ret |= snd_soc_dapm_disable_pin(dapm, "LineIn Right");
ret |= snd_soc_dapm_disable_pin(dapm, "DMic 1");
ret |= snd_soc_dapm_disable_pin(dapm, "DMic 2");
ret |= snd_soc_dapm_disable_pin(dapm, "DMic 3");
ret |= snd_soc_dapm_disable_pin(dapm, "DMic 4");
ret |= snd_soc_dapm_disable_pin(dapm, "DMic 5");
ret |= snd_soc_dapm_disable_pin(dapm, "DMic 6");
return ret;
}
void mop500_ab8500_remove(struct snd_soc_card *card)
{
struct mop500_ab8500_drvdata *drvdata = snd_soc_card_get_drvdata(card);
if (drvdata->clk_ptr_sysclk != NULL)
clk_put(drvdata->clk_ptr_sysclk);
if (drvdata->clk_ptr_ulpclk != NULL)
clk_put(drvdata->clk_ptr_ulpclk);
if (drvdata->clk_ptr_intclk != NULL)
clk_put(drvdata->clk_ptr_intclk);
snd_soc_card_set_drvdata(card, drvdata);
}
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