[media] cx231xx: Add a driver for I2C-based IR

Although cx231xx has a very good IR support, already supported by
mceusb driver, some designs decided to add a separate I2C
microcontroller chip in order to handle IR.

Due to that, add a glue to ir-kbd-i2c is needed, in order to support
those devices.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2010-10-23 13:28:33 -03:00
parent f0551efc77
commit 9ab66912e0
6 changed files with 174 additions and 5 deletions

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@ -14,6 +14,19 @@ config VIDEO_CX231XX
To compile this driver as a module, choose M here: the
module will be called cx231xx
config VIDEO_CX231XX_RC
bool "Conexant cx231xx Remote Controller additional support"
depends on VIDEO_IR
depends on VIDEO_CX231XX
default y
---help---
cx231xx hardware has a builtin RX/TX support. However, a few
designs opted to not use it, but, instead, some other hardware.
This module enables the usage of those other hardware, like the
ones used with ISDB-T boards.
On most cases, all you need for IR is mceusb module.
config VIDEO_CX231XX_ALSA
tristate "Conexant Cx231xx ALSA audio module"
depends on VIDEO_CX231XX && SND

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@ -1,5 +1,6 @@
cx231xx-objs := cx231xx-video.o cx231xx-i2c.o cx231xx-cards.o cx231xx-core.o \
cx231xx-avcore.o cx231xx-417.o cx231xx-pcb-cfg.o cx231xx-vbi.o
cx231xx-y += cx231xx-video.o cx231xx-i2c.o cx231xx-cards.o cx231xx-core.o
cx231xx-y += cx231xx-avcore.o cx231xx-417.o cx231xx-pcb-cfg.o cx231xx-vbi.o
cx231xx-$(CONFIG_VIDEO_CX231XX_RC) += cx231xx-input.o
cx231xx-alsa-objs := cx231xx-audio.o

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@ -663,8 +663,11 @@ void cx231xx_release_resources(struct cx231xx *dev)
cx231xx_remove_from_devlist(dev);
/* Release I2C buses */
cx231xx_dev_uninit(dev);
cx231xx_ir_exit(dev);
usb_put_dev(dev->udev);
/* Mark device as unused */
@ -782,6 +785,8 @@ static int cx231xx_init_dev(struct cx231xx **devhandle, struct usb_device *udev,
goto fail_reg_devices;
}
cx231xx_ir_init(dev);
cx231xx_init_extension(dev);
return 0;

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@ -1289,7 +1289,7 @@ int cx231xx_dev_init(struct cx231xx *dev)
/* Internal Master 3 Bus */
dev->i2c_bus[2].nr = 2;
dev->i2c_bus[2].dev = dev;
dev->i2c_bus[2].i2c_period = I2C_SPEED_400K; /* 400kHz */
dev->i2c_bus[2].i2c_period = I2C_SPEED_100K; /* 100kHz */
dev->i2c_bus[2].i2c_nostop = 0;
dev->i2c_bus[2].i2c_reserve = 0;

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@ -0,0 +1,122 @@
/*
* cx231xx IR glue driver
*
* Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com>
*
* Polaris (cx231xx) has its support for IR's with a design close to MCE.
* however, a few designs are using an external I2C chip for IR, instead
* of using the one provided by the chip.
* This driver provides support for those extra devices
*
* 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 version 2.
*
* 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.
*/
#include "cx231xx.h"
#include <linux/usb.h>
#include <linux/slab.h>
#define MODULE_NAME "cx231xx-input"
static int get_key_isdbt(struct IR_i2c *ir, u32 *ir_key,
u32 *ir_raw)
{
u8 cmd;
/* poll IR chip */
if (1 != i2c_master_recv(ir->c, &cmd, 1))
return -EIO;
/* it seems that 0xFE indicates that a button is still hold
down, while 0xff indicates that no button is hold
down. 0xfe sequences are sometimes interrupted by 0xFF */
if (cmd == 0xff)
return 0;
dev_dbg(&ir->input->dev, "scancode = %02x\n", cmd);
*ir_key = cmd;
*ir_raw = cmd;
return 1;
}
int cx231xx_ir_init(struct cx231xx *dev)
{
struct input_dev *input_dev;
struct i2c_board_info info;
int rc;
u8 ir_i2c_bus;
dev_dbg(&dev->udev->dev, "%s\n", __func__);
/* Only initialize if a rc keycode map is defined */
if (!cx231xx_boards[dev->model].rc_map)
return -ENODEV;
input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
request_module("ir-kbd-i2c");
memset(&info, 0, sizeof(struct i2c_board_info));
memset(&dev->ir.init_data, 0, sizeof(dev->ir.init_data));
dev->ir.input_dev = input_dev;
dev->ir.init_data.name = cx231xx_boards[dev->model].name;
dev->ir.props.priv = dev;
dev->ir.props.allowed_protos = IR_TYPE_NEC;
snprintf(dev->ir.name, sizeof(dev->ir.name),
"cx231xx IR (%s)", cx231xx_boards[dev->model].name);
usb_make_path(dev->udev, dev->ir.phys, sizeof(dev->ir.phys));
strlcat(dev->ir.phys, "/input0", sizeof(dev->ir.phys));
strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
info.platform_data = &dev->ir.init_data;
input_dev->name = dev->ir.name;
input_dev->phys = dev->ir.phys;
input_dev->dev.parent = &dev->udev->dev;
input_dev->id.bustype = BUS_USB;
input_dev->id.version = 1;
input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor);
input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct);
/*
* Board-dependent values
*
* For now, there's just one type of hardware design using
* an i2c device.
*/
dev->ir.init_data.get_key = get_key_isdbt;
dev->ir.init_data.ir_codes = cx231xx_boards[dev->model].rc_map;
/* The i2c micro-controller only outputs the cmd part of NEC protocol */
dev->ir.props.scanmask = 0xff;
info.addr = 0x30;
rc = ir_input_register(input_dev, cx231xx_boards[dev->model].rc_map,
&dev->ir.props, MODULE_NAME);
if (rc < 0)
return rc;
/* Load and bind ir-kbd-i2c */
ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master;
i2c_new_device(&dev->i2c_bus[ir_i2c_bus].i2c_adap, &info);
return rc;
}
void cx231xx_ir_exit(struct cx231xx *dev)
{
if (dev->ir.input_dev) {
ir_input_unregister(dev->ir.input_dev);
dev->ir.input_dev = NULL;
}
}

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@ -35,6 +35,7 @@
#include <media/videobuf-vmalloc.h>
#include <media/v4l2-device.h>
#include <media/ir-core.h>
#include <media/ir-kbd-i2c.h>
#include <media/videobuf-dvb.h>
#include "cx231xx-reg.h"
@ -345,6 +346,10 @@ struct cx231xx_board {
/* i2c masters */
u8 tuner_i2c_master;
u8 demod_i2c_master;
u8 ir_i2c_master;
/* for devices with I2C chips for IR */
char *rc_map;
unsigned int max_range_640_480:1;
unsigned int has_dvb:1;
@ -597,6 +602,17 @@ struct cx231xx_tsport {
void *port_priv;
};
struct cx231xx_ir_t {
struct input_dev *input_dev;
char name[40];
char phys[32];
struct ir_dev_props props;
/* I2C keyboard data */
struct IR_i2c_init_data init_data;
};
/* main device struct */
struct cx231xx {
/* generic device properties */
@ -606,6 +622,9 @@ struct cx231xx {
struct cx231xx_board board;
/* For I2C IR support */
struct cx231xx_ir_t ir;
unsigned int stream_on:1; /* Locks streams */
unsigned int vbi_stream_on:1; /* Locks streams for VBI */
unsigned int has_audio_class:1;
@ -617,8 +636,6 @@ struct cx231xx {
struct v4l2_subdev *sd_cx25840;
struct v4l2_subdev *sd_tuner;
struct cx231xx_IR *ir;
struct work_struct wq_trigger; /* Trigger to start/stop audio for alsa module */
atomic_t stream_started; /* stream should be running if true */
@ -955,6 +972,17 @@ int cx231xx_tuner_callback(void *ptr, int component, int command, int arg);
extern int cx231xx_417_register(struct cx231xx *dev);
extern void cx231xx_417_unregister(struct cx231xx *dev);
/* cx23885-input.c */
#if defined(CONFIG_VIDEO_CX231XX_RC)
int cx231xx_ir_init(struct cx231xx *dev);
void cx231xx_ir_exit(struct cx231xx *dev);
#else
#define cx231xx_ir_init(dev) (0)
#define cx231xx_ir_exit(dev) (0)
#endif
/* printk macros */
#define cx231xx_err(fmt, arg...) do {\