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linux/drivers/media/video/ivtv/ivtv-gpio.c
Andy Walls 1420d498fd V4L/DVB (12336): ivtv: Fix improper GPIO audio mux input switch on video standard change 
Remove the subdev_s_std() method from the GPIO subdev.  It appears it was
used in the past to effect the switch back from radio mode to tuner mode,
but it had a side effect that is improper and against the V4L2 spec, when
you were not in radio mode.  Whenever the video stanadrd was changed, the
GPIO audio mux was set back to the tuner audio input, even if you were set
to a Line In input.

Thanks to Ravi A. for doing the troubleshooting to point me right to the
problem.

Reported-by: Ravi A <asvravi@gmail.com>
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-09-12 12:18:12 -03:00

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/*
gpio functions.
Merging GPIO support into driver:
Copyright (C) 2004 Chris Kennedy <c@groovy.org>
Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "ivtv-driver.h"
#include "ivtv-cards.h"
#include "ivtv-gpio.h"
#include "tuner-xc2028.h"
#include <media/tuner.h>
/*
* GPIO assignment of Yuan MPG600/MPG160
*
* bit 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0
* OUTPUT IN1 IN0 AM3 AM2 AM1 AM0
* INPUT DM1 DM0
*
* IN* : Input selection
* IN1 IN0
* 1 1 N/A
* 1 0 Line
* 0 1 N/A
* 0 0 Tuner
*
* AM* : Audio Mode
* AM3 0: Normal 1: Mixed(Sub+Main channel)
* AM2 0: Subchannel 1: Main channel
* AM1 0: Stereo 1: Mono
* AM0 0: Normal 1: Mute
*
* DM* : Detected tuner audio Mode
* DM1 0: Stereo 1: Mono
* DM0 0: Multiplex 1: Normal
*
* GPIO Initial Settings
* MPG600 MPG160
* DIR 0x3080 0x7080
* OUTPUT 0x000C 0x400C
*
* Special thanks to Makoto Iguchi <iguchi@tahoo.org> and Mr. Anonymous
* for analyzing GPIO of MPG160.
*
*****************************************************************************
*
* GPIO assignment of Avermedia M179 (per information direct from AVerMedia)
*
* bit 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0
* OUTPUT IN0 AM0 IN1 AM1 AM2 IN2 BR0 BR1
* INPUT
*
* IN* : Input selection
* IN0 IN1 IN2
* * 1 * Mute
* 0 0 0 Line-In
* 1 0 0 TV Tuner Audio
* 0 0 1 FM Audio
* 1 0 1 Mute
*
* AM* : Audio Mode
* AM0 AM1 AM2
* 0 0 0 TV Tuner Audio: L_OUT=(L+R)/2, R_OUT=SAP
* 0 0 1 TV Tuner Audio: L_OUT=R_OUT=SAP (SAP)
* 0 1 0 TV Tuner Audio: L_OUT=L, R_OUT=R (stereo)
* 0 1 1 TV Tuner Audio: mute
* 1 * * TV Tuner Audio: L_OUT=R_OUT=(L+R)/2 (mono)
*
* BR* : Audio Sample Rate (BR stands for bitrate for some reason)
* BR0 BR1
* 0 0 32 kHz
* 0 1 44.1 kHz
* 1 0 48 kHz
*
* DM* : Detected tuner audio Mode
* Unknown currently
*
* Special thanks to AVerMedia Technologies, Inc. and Jiun-Kuei Jung at
* AVerMedia for providing the GPIO information used to add support
* for the M179 cards.
*/
/********************* GPIO stuffs *********************/
/* GPIO registers */
#define IVTV_REG_GPIO_IN 0x9008
#define IVTV_REG_GPIO_OUT 0x900c
#define IVTV_REG_GPIO_DIR 0x9020
void ivtv_reset_ir_gpio(struct ivtv *itv)
{
int curdir, curout;
if (itv->card->type != IVTV_CARD_PVR_150)
return;
IVTV_DEBUG_INFO("Resetting PVR150 IR\n");
curout = read_reg(IVTV_REG_GPIO_OUT);
curdir = read_reg(IVTV_REG_GPIO_DIR);
curdir |= 0x80;
write_reg(curdir, IVTV_REG_GPIO_DIR);
curout = (curout & ~0xF) | 1;
write_reg(curout, IVTV_REG_GPIO_OUT);
/* We could use something else for smaller time */
schedule_timeout_interruptible(msecs_to_jiffies(1));
curout |= 2;
write_reg(curout, IVTV_REG_GPIO_OUT);
curdir &= ~0x80;
write_reg(curdir, IVTV_REG_GPIO_DIR);
}
/* Xceive tuner reset function */
int ivtv_reset_tuner_gpio(void *dev, int component, int cmd, int value)
{
struct i2c_algo_bit_data *algo = dev;
struct ivtv *itv = algo->data;
u32 curout;
if (cmd != XC2028_TUNER_RESET)
return 0;
IVTV_DEBUG_INFO("Resetting tuner\n");
curout = read_reg(IVTV_REG_GPIO_OUT);
curout &= ~(1 << itv->card->xceive_pin);
write_reg(curout, IVTV_REG_GPIO_OUT);
schedule_timeout_interruptible(msecs_to_jiffies(1));
curout |= 1 << itv->card->xceive_pin;
write_reg(curout, IVTV_REG_GPIO_OUT);
schedule_timeout_interruptible(msecs_to_jiffies(1));
return 0;
}
static inline struct ivtv *sd_to_ivtv(struct v4l2_subdev *sd)
{
return container_of(sd, struct ivtv, sd_gpio);
}
static struct v4l2_queryctrl gpio_ctrl_mute = {
.id = V4L2_CID_AUDIO_MUTE,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
.flags = 0,
};
static int subdev_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
mask = itv->card->gpio_audio_freq.mask;
switch (freq) {
case 32000:
data = itv->card->gpio_audio_freq.f32000;
break;
case 44100:
data = itv->card->gpio_audio_freq.f44100;
break;
case 48000:
default:
data = itv->card->gpio_audio_freq.f48000;
break;
}
if (mask)
write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
return 0;
}
static int subdev_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask;
mask = itv->card->gpio_audio_detect.mask;
if (mask == 0 || (read_reg(IVTV_REG_GPIO_IN) & mask))
vt->rxsubchans = V4L2_TUNER_SUB_STEREO |
V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
else
vt->rxsubchans = V4L2_TUNER_SUB_MONO;
return 0;
}
static int subdev_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
mask = itv->card->gpio_audio_mode.mask;
switch (vt->audmode) {
case V4L2_TUNER_MODE_LANG1:
data = itv->card->gpio_audio_mode.lang1;
break;
case V4L2_TUNER_MODE_LANG2:
data = itv->card->gpio_audio_mode.lang2;
break;
case V4L2_TUNER_MODE_MONO:
data = itv->card->gpio_audio_mode.mono;
break;
case V4L2_TUNER_MODE_STEREO:
case V4L2_TUNER_MODE_LANG1_LANG2:
default:
data = itv->card->gpio_audio_mode.stereo;
break;
}
if (mask)
write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
return 0;
}
static int subdev_s_radio(struct v4l2_subdev *sd)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
mask = itv->card->gpio_audio_input.mask;
data = itv->card->gpio_audio_input.radio;
if (mask)
write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
return 0;
}
static int subdev_s_audio_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
if (input > 2)
return -EINVAL;
mask = itv->card->gpio_audio_input.mask;
switch (input) {
case 0:
data = itv->card->gpio_audio_input.tuner;
break;
case 1:
data = itv->card->gpio_audio_input.linein;
break;
case 2:
default:
data = itv->card->gpio_audio_input.radio;
break;
}
if (mask)
write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
return 0;
}
static int subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
if (ctrl->id != V4L2_CID_AUDIO_MUTE)
return -EINVAL;
mask = itv->card->gpio_audio_mute.mask;
data = itv->card->gpio_audio_mute.mute;
ctrl->value = (read_reg(IVTV_REG_GPIO_OUT) & mask) == data;
return 0;
}
static int subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
if (ctrl->id != V4L2_CID_AUDIO_MUTE)
return -EINVAL;
mask = itv->card->gpio_audio_mute.mask;
data = ctrl->value ? itv->card->gpio_audio_mute.mute : 0;
if (mask)
write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
return 0;
}
static int subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
if (qc->id != V4L2_CID_AUDIO_MUTE)
return -EINVAL;
*qc = gpio_ctrl_mute;
return 0;
}
static int subdev_log_status(struct v4l2_subdev *sd)
{
struct ivtv *itv = sd_to_ivtv(sd);
IVTV_INFO("GPIO status: DIR=0x%04x OUT=0x%04x IN=0x%04x\n",
read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT),
read_reg(IVTV_REG_GPIO_IN));
return 0;
}
static int subdev_s_video_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
if (input > 2) /* 0:Tuner 1:Composite 2:S-Video */
return -EINVAL;
mask = itv->card->gpio_video_input.mask;
if (input == 0)
data = itv->card->gpio_video_input.tuner;
else if (input == 1)
data = itv->card->gpio_video_input.composite;
else
data = itv->card->gpio_video_input.svideo;
if (mask)
write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
return 0;
}
static const struct v4l2_subdev_core_ops subdev_core_ops = {
.log_status = subdev_log_status,
.g_ctrl = subdev_g_ctrl,
.s_ctrl = subdev_s_ctrl,
.queryctrl = subdev_queryctrl,
};
static const struct v4l2_subdev_tuner_ops subdev_tuner_ops = {
.s_radio = subdev_s_radio,
.g_tuner = subdev_g_tuner,
.s_tuner = subdev_s_tuner,
};
static const struct v4l2_subdev_audio_ops subdev_audio_ops = {
.s_clock_freq = subdev_s_clock_freq,
.s_routing = subdev_s_audio_routing,
};
static const struct v4l2_subdev_video_ops subdev_video_ops = {
.s_routing = subdev_s_video_routing,
};
static const struct v4l2_subdev_ops subdev_ops = {
.core = &subdev_core_ops,
.tuner = &subdev_tuner_ops,
.audio = &subdev_audio_ops,
.video = &subdev_video_ops,
};
int ivtv_gpio_init(struct ivtv *itv)
{
u16 pin = 0;
if (itv->card->xceive_pin)
pin = 1 << itv->card->xceive_pin;
if ((itv->card->gpio_init.direction | pin) == 0)
return 0;
IVTV_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT));
/* init output data then direction */
write_reg(itv->card->gpio_init.initial_value | pin, IVTV_REG_GPIO_OUT);
write_reg(itv->card->gpio_init.direction | pin, IVTV_REG_GPIO_DIR);
v4l2_subdev_init(&itv->sd_gpio, &subdev_ops);
snprintf(itv->sd_gpio.name, sizeof(itv->sd_gpio.name), "%s-gpio", itv->v4l2_dev.name);
itv->sd_gpio.grp_id = IVTV_HW_GPIO;
return v4l2_device_register_subdev(&itv->v4l2_dev, &itv->sd_gpio);
}
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