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// SPDX-License-Identifier: GPL-2.0-or-later
/*
gpio functions.
Merging GPIO support into driver:
Copyright (C) 2004 Chris Kennedy <c@groovy.org>
Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl>
*/
#include "ivtv-driver.h"
#include "ivtv-cards.h"
#include "ivtv-gpio.h"
#include "tuner-xc2028.h"
#include <media/tuner.h>
#include <media/v4l2-ctrls.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 inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct ivtv, hdl_gpio)->sd_gpio;
}
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, const 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_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
struct ivtv *itv = sd_to_ivtv(sd);
u16 mask, data;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
mask = itv->card->gpio_audio_mute.mask;
data = ctrl->val ? 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;
}
return -EINVAL;
}
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));
v4l2_ctrl_handler_log_status(&itv->hdl_gpio, sd->name);
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_ctrl_ops gpio_ctrl_ops = {
.s_ctrl = subdev_s_ctrl,
};
static const struct v4l2_subdev_core_ops subdev_core_ops = {
.log_status = subdev_log_status,
};
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;
v4l2_ctrl_handler_init(&itv->hdl_gpio, 1);
v4l2_ctrl_new_std(&itv->hdl_gpio, &gpio_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
if (itv->hdl_gpio.error)
return itv->hdl_gpio.error;
itv->sd_gpio.ctrl_handler = &itv->hdl_gpio;
v4l2_ctrl_handler_setup(&itv->hdl_gpio);
return v4l2_device_register_subdev(&itv->v4l2_dev, &itv->sd_gpio);
}
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