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path: root/drivers/media/pci/cx88/cx88-tvaudio.c
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Diffstat (limited to 'drivers/media/pci/cx88/cx88-tvaudio.c')
-rw-r--r--drivers/media/pci/cx88/cx88-tvaudio.c169
1 files changed, 86 insertions, 83 deletions
diff --git a/drivers/media/pci/cx88/cx88-tvaudio.c b/drivers/media/pci/cx88/cx88-tvaudio.c
index 6bbce6ad6295..545ad4c4d1c7 100644
--- a/drivers/media/pci/cx88/cx88-tvaudio.c
+++ b/drivers/media/pci/cx88/cx88-tvaudio.c
@@ -1,39 +1,36 @@
/*
+ * cx88x-audio.c - Conexant CX23880/23881 audio downstream driver driver
+ *
+ * (c) 2001 Michael Eskin, Tom Zakrajsek [Windows version]
+ * (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
+ * (c) 2003 Gerd Knorr <kraxel@bytesex.org>
+ *
+ * -----------------------------------------------------------------------
+ *
+ * Lot of voodoo here. Even the data sheet doesn't help to
+ * understand what is going on here, the documentation for the audio
+ * part of the cx2388x chip is *very* bad.
+ *
+ * Some of this comes from party done linux driver sources I got from
+ * [undocumented].
+ *
+ * Some comes from the dscaler sources, one of the dscaler driver guy works
+ * for Conexant ...
+ *
+ * -----------------------------------------------------------------------
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
- cx88x-audio.c - Conexant CX23880/23881 audio downstream driver driver
-
- (c) 2001 Michael Eskin, Tom Zakrajsek [Windows version]
- (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
- (c) 2003 Gerd Knorr <kraxel@bytesex.org>
-
- -----------------------------------------------------------------------
-
- Lot of voodoo here. Even the data sheet doesn't help to
- understand what is going on here, the documentation for the audio
- part of the cx2388x chip is *very* bad.
-
- Some of this comes from party done linux driver sources I got from
- [undocumented].
-
- Some comes from the dscaler sources, one of the dscaler driver guy works
- for Conexant ...
-
- -----------------------------------------------------------------------
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+#include "cx88.h"
#include <linux/module.h>
#include <linux/errno.h>
@@ -50,24 +47,24 @@
#include <linux/delay.h>
#include <linux/kthread.h>
-#include "cx88.h"
-
static unsigned int audio_debug;
module_param(audio_debug, int, 0644);
MODULE_PARM_DESC(audio_debug, "enable debug messages [audio]");
static unsigned int always_analog;
-module_param(always_analog,int,0644);
-MODULE_PARM_DESC(always_analog,"force analog audio out");
+module_param(always_analog, int, 0644);
+MODULE_PARM_DESC(always_analog, "force analog audio out");
static unsigned int radio_deemphasis;
-module_param(radio_deemphasis,int,0644);
-MODULE_PARM_DESC(radio_deemphasis, "Radio deemphasis time constant, "
- "0=None, 1=50us (elsewhere), 2=75us (USA)");
-
-#define dprintk(fmt, arg...) if (audio_debug) \
- printk(KERN_DEBUG "%s/0: " fmt, core->name , ## arg)
-
+module_param(radio_deemphasis, int, 0644);
+MODULE_PARM_DESC(radio_deemphasis,
+ "Radio deemphasis time constant, 0=None, 1=50us (elsewhere), 2=75us (USA)");
+
+#define dprintk(fmt, arg...) do { \
+ if (audio_debug) \
+ printk(KERN_DEBUG pr_fmt("%s: tvaudio:" fmt), \
+ __func__, ##arg); \
+} while (0)
/* ----------------------------------------------------------- */
static const char * const aud_ctl_names[64] = {
@@ -145,7 +142,10 @@ static void set_audio_finish(struct cx88_core *core, u32 ctl)
if (core->board.mpeg & CX88_MPEG_BLACKBIRD) {
cx_write(AUD_I2SINPUTCNTL, 4);
cx_write(AUD_BAUDRATE, 1);
- /* 'pass-thru mode': this enables the i2s output to the mpeg encoder */
+ /*
+ * 'pass-thru mode': this enables the i2s
+ * output to the mpeg encoder
+ */
cx_set(AUD_CTL, EN_I2SOUT_ENABLE);
cx_write(AUD_I2SOUTPUTCNTL, 1);
cx_write(AUD_I2SCNTL, 0);
@@ -349,7 +349,7 @@ static void set_audio_standard_NICAM(struct cx88_core *core, u32 mode)
{ /* end of list */ },
};
- set_audio_start(core,SEL_NICAM);
+ set_audio_start(core, SEL_NICAM);
switch (core->tvaudio) {
case WW_L:
dprintk("%s SECAM-L NICAM (status: devel)\n", __func__);
@@ -638,7 +638,6 @@ static void set_audio_standard_A2(struct cx88_core *core, u32 mode)
case WW_M:
dprintk("%s Warning: wrong value\n", __func__);
return;
- break;
}
mode |= EN_FMRADIO_EN_RDS | EN_DMTRX_SUMDIFF;
@@ -695,13 +694,15 @@ static void set_audio_standard_FM(struct cx88_core *core,
{ /* end of list */ },
};
- /* It is enough to leave default values? */
- /* No, it's not! The deemphasis registers are reset to the 75us
+ /*
+ * It is enough to leave default values?
+ *
+ * No, it's not! The deemphasis registers are reset to the 75us
* values by default. Analyzing the spectrum of the decoded audio
* reveals that "no deemphasis" is the same as 75 us, while the 50 us
- * setting results in less deemphasis. */
+ * setting results in less deemphasis.
+ */
static const struct rlist fm_no_deemph[] = {
-
{AUD_POLYPH80SCALEFAC, 0x0003},
{ /* end of list */ },
};
@@ -745,7 +746,7 @@ static int cx88_detect_nicam(struct cx88_core *core)
}
/* wait a little bit for next reading status */
- msleep(10);
+ usleep_range(10000, 20000);
}
dprintk("nicam is not detected.\n");
@@ -766,10 +767,12 @@ void cx88_set_tvaudio(struct cx88_core *core)
/* prepare all dsp registers */
set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
- /* set nicam mode - otherwise
- AUD_NICAM_STATUS2 contains wrong values */
+ /*
+ * set nicam mode - otherwise
+ * AUD_NICAM_STATUS2 contains wrong values
+ */
set_audio_standard_NICAM(core, EN_NICAM_AUTO_STEREO);
- if (0 == cx88_detect_nicam(core)) {
+ if (cx88_detect_nicam(core) == 0) {
/* fall back to fm / am mono */
set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
core->audiomode_current = V4L2_TUNER_MODE_MONO;
@@ -798,23 +801,25 @@ void cx88_set_tvaudio(struct cx88_core *core)
break;
case WW_NONE:
case WW_I2SPT:
- printk("%s/0: unknown tv audio mode [%d]\n",
- core->name, core->tvaudio);
+ pr_info("unknown tv audio mode [%d]\n", core->tvaudio);
break;
}
- return;
}
+EXPORT_SYMBOL(cx88_set_tvaudio);
void cx88_newstation(struct cx88_core *core)
{
core->audiomode_manual = UNSET;
core->last_change = jiffies;
}
+EXPORT_SYMBOL(cx88_newstation);
void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
{
- static const char * const m[] = { "stereo", "dual mono", "mono", "sap" };
- static const char * const p[] = { "no pilot", "pilot c1", "pilot c2", "?" };
+ static const char * const m[] = { "stereo", "dual mono",
+ "mono", "sap" };
+ static const char * const p[] = { "no pilot", "pilot c1",
+ "pilot c2", "?" };
u32 reg, mode, pilot;
reg = cx_read(AUD_STATUS);
@@ -869,15 +874,18 @@ void cx88_get_stereo(struct cx88_core *core, struct v4l2_tuner *t)
}
/* If software stereo detection is not supported... */
- if (UNSET == t->rxsubchans) {
+ if (t->rxsubchans == UNSET) {
t->rxsubchans = V4L2_TUNER_SUB_MONO;
- /* If the hardware itself detected stereo, also return
- stereo as an available subchannel */
- if (V4L2_TUNER_MODE_STEREO == t->audmode)
+ /*
+ * If the hardware itself detected stereo, also return
+ * stereo as an available subchannel
+ */
+ if (t->audmode == V4L2_TUNER_MODE_STEREO)
t->rxsubchans |= V4L2_TUNER_SUB_STEREO;
}
- return;
}
+EXPORT_SYMBOL(cx88_get_stereo);
+
void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
{
@@ -887,7 +895,7 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
if (manual) {
core->audiomode_manual = mode;
} else {
- if (UNSET != core->audiomode_manual)
+ if (core->audiomode_manual != UNSET)
return;
}
core->audiomode_current = mode;
@@ -915,7 +923,7 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
case WW_M:
case WW_I:
case WW_L:
- if (1 == core->use_nicam) {
+ if (core->use_nicam == 1) {
switch (mode) {
case V4L2_TUNER_MODE_MONO:
case V4L2_TUNER_MODE_LANG1:
@@ -933,7 +941,8 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
break;
}
} else {
- if ((core->tvaudio == WW_I) || (core->tvaudio == WW_L)) {
+ if ((core->tvaudio == WW_I) ||
+ (core->tvaudio == WW_L)) {
/* fall back to fm / am mono */
set_audio_standard_A2(core, EN_A2_FORCE_MONO1);
} else {
@@ -975,15 +984,14 @@ void cx88_set_stereo(struct cx88_core *core, u32 mode, int manual)
break;
}
- if (UNSET != ctl) {
- dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x "
- "[status=0x%x,ctl=0x%x,vol=0x%x]\n",
+ if (ctl != UNSET) {
+ dprintk("cx88_set_stereo: mask 0x%x, ctl 0x%x [status=0x%x,ctl=0x%x,vol=0x%x]\n",
mask, ctl, cx_read(AUD_STATUS),
cx_read(AUD_CTL), cx_sread(SHADOW_AUD_VOL_CTL));
cx_andor(AUD_CTL, mask, ctl);
}
- return;
}
+EXPORT_SYMBOL(cx88_set_stereo);
int cx88_audio_thread(void *data)
{
@@ -1012,7 +1020,7 @@ int cx88_audio_thread(void *data)
memset(&t, 0, sizeof(t));
cx88_get_stereo(core, &t);
- if (UNSET != core->audiomode_manual)
+ if (core->audiomode_manual != UNSET)
/* manually set, don't do anything. */
continue;
@@ -1033,8 +1041,10 @@ int cx88_audio_thread(void *data)
case WW_FM:
case WW_I2SADC:
hw_autodetect:
- /* stereo autodetection is supported by hardware so
- we don't need to do it manually. Do nothing. */
+ /*
+ * stereo autodetection is supported by hardware so
+ * we don't need to do it manually. Do nothing.
+ */
break;
}
}
@@ -1042,11 +1052,4 @@ hw_autodetect:
dprintk("cx88: tvaudio thread exiting\n");
return 0;
}
-
-/* ----------------------------------------------------------- */
-
-EXPORT_SYMBOL(cx88_set_tvaudio);
-EXPORT_SYMBOL(cx88_newstation);
-EXPORT_SYMBOL(cx88_set_stereo);
-EXPORT_SYMBOL(cx88_get_stereo);
EXPORT_SYMBOL(cx88_audio_thread);
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-27 06:34:46 +0300