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Message-ID: <20210315165706.3629-2-vitalyr@opensource.cirrus.com>
Date: Mon, 15 Mar 2021 16:57:03 +0000
From: Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
To: Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
CC: <alsa-devel@...a-project.org>, <patches@...nsource.cirrus.com>,
<linux-kernel@...r.kernel.org>,
Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v2 1/4] ALSA: hda/cirrus: Add error handling into CS8409 I2C functions
From: Stefan Binding <sbinding@...nsource.cirrus.com>
Also removing 2 redundant cs8409_i2c_read() calls, as we already did read
them in a code above.
Tested on DELL Inspiron-3505, DELL Inspiron-3501, DELL Inspiron-3500
Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
Changes in v1:
- No changes
Changes in v2:
- Chanaged commit message to describe removal of 2 cs8409_i2c_read()s.
- Added comments for i2c_read/write functions
- Removed redundant parentheses
---
sound/pci/hda/patch_cirrus.c | 136 +++++++++++++++++++++++------------
1 file changed, 91 insertions(+), 45 deletions(-)
diff --git a/sound/pci/hda/patch_cirrus.c b/sound/pci/hda/patch_cirrus.c
index 6a9e5c803977..6c062c7ab76a 100644
--- a/sound/pci/hda/patch_cirrus.c
+++ b/sound/pci/hda/patch_cirrus.c
@@ -1493,22 +1493,34 @@ static const struct cs8409_cir_param cs8409_cs42l42_hw_cfg[] = {
{} /* Terminator */
};
-/* Enable I2C clocks */
-static void cs8409_enable_i2c_clock(struct hda_codec *codec, unsigned int flag)
+/**
+ * cs8409_enable_i2c_clock - Enable I2C clocks
+ * @codec: the codec instance
+ * @enable: Enable or disable I2C clocks
+ *
+ * Enable or Disable I2C clocks.
+ */
+static void cs8409_enable_i2c_clock(struct hda_codec *codec, unsigned int enable)
{
unsigned int retval = 0;
unsigned int newval = 0;
retval = cs_vendor_coef_get(codec, 0x0);
- newval = (flag) ? (retval | 0x8) : (retval & 0xfffffff7);
+ newval = (enable) ? (retval | 0x8) : (retval & 0xfffffff7);
cs_vendor_coef_set(codec, 0x0, newval);
}
-/* Wait I2C transaction */
+/**
+ * cs8409_i2c_wait_complete - Wait for I2C transaction
+ * @codec: the codec instance
+ *
+ * Wait for I2C transaction to complete.
+ * Return -1 if transaction wait times out.
+ */
static int cs8409_i2c_wait_complete(struct hda_codec *codec)
{
int repeat = 5;
- unsigned int retval = 0;
+ unsigned int retval;
do {
retval = cs_vendor_coef_get(codec, CIR_I2C_STATUS);
@@ -1516,82 +1528,103 @@ static int cs8409_i2c_wait_complete(struct hda_codec *codec)
usleep_range(2000, 4000);
--repeat;
} else
- break;
+ return 0;
} while (repeat);
- return repeat > 0 ? 0 : -1;
+ return -1;
}
-/* CS8409 slave i2cRead */
-static unsigned int cs8409_i2c_read(struct hda_codec *codec,
+/**
+ * cs8409_i2c_read - CS8409 I2C Read.
+ * @codec: the codec instance
+ * @i2c_address: I2C Address
+ * @i2c_reg: Register to read
+ * @paged: Is a paged transaction
+ *
+ * CS8409 I2C Read.
+ * Returns negative on error, otherwise returns read value in bits 0-7.
+ */
+static int cs8409_i2c_read(struct hda_codec *codec,
unsigned int i2c_address,
unsigned int i2c_reg,
unsigned int paged)
{
unsigned int i2c_reg_data;
- unsigned int retval = 0;
+ unsigned int read_data;
cs8409_enable_i2c_clock(codec, 1);
cs_vendor_coef_set(codec, CIR_I2C_ADDR, i2c_address);
if (paged) {
cs_vendor_coef_set(codec, CIR_I2C_QWRITE, i2c_reg >> 8);
- if (cs8409_i2c_wait_complete(codec) == -1) {
+ if (cs8409_i2c_wait_complete(codec) < 0) {
codec_err(codec,
- "%s() Paged Transaction Failed 0x%02x : 0x%04x = 0x%02x\n",
- __func__, i2c_address, i2c_reg, retval);
+ "%s() Paged Transaction Failed 0x%02x : 0x%04x\n",
+ __func__, i2c_address, i2c_reg);
+ return -EIO;
}
}
i2c_reg_data = (i2c_reg << 8) & 0x0ffff;
cs_vendor_coef_set(codec, CIR_I2C_QREAD, i2c_reg_data);
- if (cs8409_i2c_wait_complete(codec) == -1) {
- codec_err(codec, "%s() Transaction Failed 0x%02x : 0x%04x = 0x%02x\n",
- __func__, i2c_address, i2c_reg, retval);
+ if (cs8409_i2c_wait_complete(codec) < 0) {
+ codec_err(codec, "%s() Transaction Failed 0x%02x : 0x%04x\n",
+ __func__, i2c_address, i2c_reg);
+ return -EIO;
}
/* Register in bits 15-8 and the data in 7-0 */
- retval = cs_vendor_coef_get(codec, CIR_I2C_QREAD);
- retval &= 0x0ff;
+ read_data = cs_vendor_coef_get(codec, CIR_I2C_QREAD);
cs8409_enable_i2c_clock(codec, 0);
- return retval;
+ return read_data & 0x0ff;
}
-/* CS8409 slave i2cWrite */
-static unsigned int cs8409_i2c_write(struct hda_codec *codec,
+/**
+ * cs8409_i2c_read - CS8409 I2C Write.
+ * @codec: the codec instance
+ * @i2c_address: I2C Address
+ * @i2c_reg: Register to write to
+ * @i2c_data: Data to write
+ * @paged: Is a paged transaction
+ *
+ * CS8409 I2C Write.
+ * Returns negative on error, otherwise returns 0.
+ */
+static int cs8409_i2c_write(struct hda_codec *codec,
unsigned int i2c_address, unsigned int i2c_reg,
unsigned int i2c_data,
unsigned int paged)
{
- unsigned int retval = 0;
- unsigned int i2c_reg_data = 0;
+ unsigned int i2c_reg_data;
cs8409_enable_i2c_clock(codec, 1);
cs_vendor_coef_set(codec, CIR_I2C_ADDR, i2c_address);
if (paged) {
cs_vendor_coef_set(codec, CIR_I2C_QWRITE, i2c_reg >> 8);
- if (cs8409_i2c_wait_complete(codec) == -1) {
+ if (cs8409_i2c_wait_complete(codec) < 0) {
codec_err(codec,
- "%s() Paged Transaction Failed 0x%02x : 0x%04x = 0x%02x\n",
- __func__, i2c_address, i2c_reg, retval);
+ "%s() Paged Transaction Failed 0x%02x : 0x%04x\n",
+ __func__, i2c_address, i2c_reg);
+ return -EIO;
}
}
i2c_reg_data = ((i2c_reg << 8) & 0x0ff00) | (i2c_data & 0x0ff);
cs_vendor_coef_set(codec, CIR_I2C_QWRITE, i2c_reg_data);
- if (cs8409_i2c_wait_complete(codec) == -1) {
- codec_err(codec, "%s() Transaction Failed 0x%02x : 0x%04x = 0x%02x\n",
- __func__, i2c_address, i2c_reg, retval);
+ if (cs8409_i2c_wait_complete(codec) < 0) {
+ codec_err(codec, "%s() Transaction Failed 0x%02x : 0x%04x\n",
+ __func__, i2c_address, i2c_reg);
+ return -EIO;
}
cs8409_enable_i2c_clock(codec, 0);
- return retval;
+ return 0;
}
static int cs8409_cs42l42_volume_info(struct snd_kcontrol *kcontrol,
@@ -1624,14 +1657,27 @@ static int cs8409_cs42l42_volume_info(struct snd_kcontrol *kcontrol,
static void cs8409_cs42l42_update_volume(struct hda_codec *codec)
{
struct cs_spec *spec = codec->spec;
+ int data;
mutex_lock(&spec->cs8409_i2c_mux);
- spec->cs42l42_hp_volume[0] = -(cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
- CS8409_CS42L42_REG_HS_VOLUME_CHA, 1));
- spec->cs42l42_hp_volume[1] = -(cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
- CS8409_CS42L42_REG_HS_VOLUME_CHB, 1));
- spec->cs42l42_hs_mic_volume[0] = -(cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
- CS8409_CS42L42_REG_AMIC_VOLUME, 1));
+ data = cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
+ CS8409_CS42L42_REG_HS_VOLUME_CHA, 1);
+ if (data >= 0)
+ spec->cs42l42_hp_volume[0] = -data;
+ else
+ spec->cs42l42_hp_volume[0] = CS8409_CS42L42_HP_VOL_REAL_MIN;
+ data = cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
+ CS8409_CS42L42_REG_HS_VOLUME_CHB, 1);
+ if (data >= 0)
+ spec->cs42l42_hp_volume[1] = -data;
+ else
+ spec->cs42l42_hp_volume[1] = CS8409_CS42L42_HP_VOL_REAL_MIN;
+ data = cs8409_i2c_read(codec, CS42L42_I2C_ADDR,
+ CS8409_CS42L42_REG_AMIC_VOLUME, 1);
+ if (data >= 0)
+ spec->cs42l42_hs_mic_volume[0] = -data;
+ else
+ spec->cs42l42_hs_mic_volume[0] = CS8409_CS42L42_AMIC_VOL_REAL_MIN;
mutex_unlock(&spec->cs8409_i2c_mux);
spec->cs42l42_volume_init = 1;
}
@@ -1782,7 +1828,7 @@ static void cs8409_cs42l42_reset(struct hda_codec *codec)
}
/* Configure CS42L42 slave codec for jack autodetect */
-static int cs8409_cs42l42_enable_jack_detect(struct hda_codec *codec)
+static void cs8409_cs42l42_enable_jack_detect(struct hda_codec *codec)
{
struct cs_spec *spec = codec->spec;
@@ -1804,8 +1850,6 @@ static int cs8409_cs42l42_enable_jack_detect(struct hda_codec *codec)
cs8409_i2c_write(codec, CS42L42_I2C_ADDR, 0x1b79, 0x00, 1);
mutex_unlock(&spec->cs8409_i2c_mux);
-
- return 0;
}
/* Enable and run CS42L42 slave codec jack auto detect */
@@ -1860,9 +1904,9 @@ static void cs8409_jack_unsol_event(struct hda_codec *codec, unsigned int res)
{
struct cs_spec *spec = codec->spec;
int status_changed = 0;
- unsigned int reg_cdc_status = 0;
- unsigned int reg_hs_status = 0;
- unsigned int reg_ts_status = 0;
+ int reg_cdc_status;
+ int reg_hs_status;
+ int reg_ts_status;
int type = 0;
struct hda_jack_tbl *jk;
@@ -1881,13 +1925,15 @@ static void cs8409_jack_unsol_event(struct hda_codec *codec, unsigned int res)
reg_hs_status = cs8409_i2c_read(codec, CS42L42_I2C_ADDR, 0x1124, 1);
reg_ts_status = cs8409_i2c_read(codec, CS42L42_I2C_ADDR, 0x130f, 1);
- /* Clear interrupts */
+ /* Clear interrupts, by reading interrupt status registers */
cs8409_i2c_read(codec, CS42L42_I2C_ADDR, 0x1b7b, 1);
- cs8409_i2c_read(codec, CS42L42_I2C_ADDR, 0x1308, 1);
- cs8409_i2c_read(codec, CS42L42_I2C_ADDR, 0x130f, 1);
mutex_unlock(&spec->cs8409_i2c_mux);
+ /* If status values are < 0, read error has occurred. */
+ if (reg_cdc_status < 0 || reg_hs_status < 0 || reg_ts_status < 0)
+ return;
+
/* HSDET_AUTO_DONE */
if (reg_cdc_status & CS42L42_HSDET_AUTO_DONE) {
--
2.25.1
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