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linux/drivers/media/video/ir-kbd-i2c.c

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/*
*
* keyboard input driver for i2c IR remote controls
*
* Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
* modified for PixelView (BT878P+W/FM) by
* Michal Kochanowicz <mkochano@pld.org.pl>
* Christoph Bartelmus <lirc@bartelmus.de>
* modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
* Ulrich Mueller <ulrich.mueller42@web.de>
* modified for em2820 based USB TV tuners by
* Markus Rechberger <mrechberger@gmail.com>
* modified for DViCO Fusion HDTV 5 RT GOLD by
* Chaogui Zhang <czhang1974@gmail.com>
* modified for MSI TV@nywhere Plus by
* Henry Wong <henry@stuffedcow.net>
* Mark Schultz <n9xmj@yahoo.com>
* Brian Rogers <brian_rogers@comcast.net>
* modified for AVerMedia Cardbus by
* Oldrich Jedlicka <oldium.pro@seznam.cz>
*
* 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 <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/workqueue.h>
#include <media/ir-common.h>
#include <media/ir-kbd-i2c.h>
/* ----------------------------------------------------------------------- */
/* insmod parameters */
static int debug;
module_param(debug, int, 0644); /* debug level (0,1,2) */
static int hauppauge;
module_param(hauppauge, int, 0644); /* Choose Hauppauge remote */
MODULE_PARM_DESC(hauppauge, "Specify Hauppauge remote: 0=black, 1=grey (defaults to 0)");
#define DEVNAME "ir-kbd-i2c"
#define dprintk(level, fmt, arg...) if (debug >= level) \
printk(KERN_DEBUG DEVNAME ": " fmt , ## arg)
/* ----------------------------------------------------------------------- */
static int get_key_haup_common(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw,
int size, int offset)
{
unsigned char buf[6];
int start, range, toggle, dev, code, ircode;
/* poll IR chip */
if (size != i2c_master_recv(ir->c, buf, size))
return -EIO;
/* split rc5 data block ... */
start = (buf[offset] >> 7) & 1;
range = (buf[offset] >> 6) & 1;
toggle = (buf[offset] >> 5) & 1;
dev = buf[offset] & 0x1f;
code = (buf[offset+1] >> 2) & 0x3f;
/* rc5 has two start bits
* the first bit must be one
* the second bit defines the command range (1 = 0-63, 0 = 64 - 127)
*/
if (!start)
/* no key pressed */
return 0;
/*
* Hauppauge remotes (black/silver) always use
* specific device ids. If we do not filter the
* device ids then messages destined for devices
* such as TVs (id=0) will get through causing
* mis-fired events.
*
* We also filter out invalid key presses which
* produce annoying debug log entries.
*/
ircode= (start << 12) | (toggle << 11) | (dev << 6) | code;
if ((ircode & 0x1fff)==0x1fff)
/* invalid key press */
return 0;
if (dev!=0x1e && dev!=0x1f)
/* not a hauppauge remote */
return 0;
if (!range)
code += 64;
dprintk(1,"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
start, range, toggle, dev, code);
/* return key */
*ir_key = code;
*ir_raw = ircode;
return 1;
}
static int get_key_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
return get_key_haup_common (ir, ir_key, ir_raw, 3, 0);
}
static int get_key_haup_xvr(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
return get_key_haup_common (ir, ir_key, ir_raw, 6, 3);
}
static int get_key_pixelview(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
unsigned char b;
/* poll IR chip */
if (1 != i2c_master_recv(ir->c, &b, 1)) {
dprintk(1,"read error\n");
return -EIO;
}
*ir_key = b;
*ir_raw = b;
return 1;
}
static int get_key_pv951(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
unsigned char b;
/* poll IR chip */
if (1 != i2c_master_recv(ir->c, &b, 1)) {
dprintk(1,"read error\n");
return -EIO;
}
/* ignore 0xaa */
if (b==0xaa)
return 0;
dprintk(2,"key %02x\n", b);
*ir_key = b;
*ir_raw = b;
return 1;
}
static int get_key_fusionhdtv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
unsigned char buf[4];
/* poll IR chip */
if (4 != i2c_master_recv(ir->c, buf, 4)) {
dprintk(1,"read error\n");
return -EIO;
}
if(buf[0] !=0 || buf[1] !=0 || buf[2] !=0 || buf[3] != 0)
dprintk(2, "%s: 0x%2x 0x%2x 0x%2x 0x%2x\n", __func__,
buf[0], buf[1], buf[2], buf[3]);
/* no key pressed or signal from other ir remote */
if(buf[0] != 0x1 || buf[1] != 0xfe)
return 0;
*ir_key = buf[2];
*ir_raw = (buf[2] << 8) | buf[3];
return 1;
}
static int get_key_knc1(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
unsigned char b;
/* poll IR chip */
if (1 != i2c_master_recv(ir->c, &b, 1)) {
dprintk(1,"read error\n");
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 */
dprintk(2,"key %02x\n", b);
if (b == 0xff)
return 0;
if (b == 0xfe)
/* keep old data */
return 1;
*ir_key = b;
*ir_raw = b;
return 1;
}
static int get_key_avermedia_cardbus(struct IR_i2c *ir,
u32 *ir_key, u32 *ir_raw)
{
unsigned char subaddr, key, keygroup;
struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
.buf = &subaddr, .len = 1},
{ .addr = ir->c->addr, .flags = I2C_M_RD,
.buf = &key, .len = 1} };
subaddr = 0x0d;
if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
dprintk(1, "read error\n");
return -EIO;
}
if (key == 0xff)
return 0;
subaddr = 0x0b;
msg[1].buf = &keygroup;
if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
dprintk(1, "read error\n");
return -EIO;
}
if (keygroup == 0xff)
return 0;
dprintk(1, "read key 0x%02x/0x%02x\n", key, keygroup);
if (keygroup < 2 || keygroup > 3) {
/* Only a warning */
dprintk(1, "warning: invalid key group 0x%02x for key 0x%02x\n",
keygroup, key);
}
key |= (keygroup & 1) << 6;
*ir_key = key;
*ir_raw = key;
return 1;
}
/* ----------------------------------------------------------------------- */
static void ir_key_poll(struct IR_i2c *ir)
{
static u32 ir_key, ir_raw;
int rc;
dprintk(2,"ir_poll_key\n");
rc = ir->get_key(ir, &ir_key, &ir_raw);
if (rc < 0) {
dprintk(2,"error\n");
return;
}
if (0 == rc) {
ir_input_nokey(ir->input, &ir->ir);
} else {
ir_input_keydown(ir->input, &ir->ir, ir_key, ir_raw);
}
}
static void ir_work(struct work_struct *work)
{
struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
int polling_interval = 100;
/* MSI TV@nywhere Plus requires more frequent polling
otherwise it will miss some keypresses */
if (ir->c->adapter->id == I2C_HW_SAA7134 && ir->c->addr == 0x30)
polling_interval = 50;
ir_key_poll(ir);
schedule_delayed_work(&ir->work, msecs_to_jiffies(polling_interval));
}
/* ----------------------------------------------------------------------- */
static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct ir_scancode_table *ir_codes = NULL;
const char *name = NULL;
int ir_type;
struct IR_i2c *ir;
struct input_dev *input_dev;
struct i2c_adapter *adap = client->adapter;
unsigned short addr = client->addr;
int err;
ir = kzalloc(sizeof(struct IR_i2c),GFP_KERNEL);
input_dev = input_allocate_device();
if (!ir || !input_dev) {
err = -ENOMEM;
goto err_out_free;
}
ir->c = client;
ir->input = input_dev;
i2c_set_clientdata(client, ir);
switch(addr) {
case 0x64:
name = "Pixelview";
ir->get_key = get_key_pixelview;
ir_type = IR_TYPE_OTHER;
ir_codes = &ir_codes_empty_table;
break;
case 0x4b:
name = "PV951";
ir->get_key = get_key_pv951;
ir_type = IR_TYPE_OTHER;
ir_codes = &ir_codes_pv951_table;
break;
case 0x18:
case 0x1a:
name = "Hauppauge";
ir->get_key = get_key_haup;
ir_type = IR_TYPE_RC5;
if (hauppauge == 1) {
ir_codes = &ir_codes_hauppauge_new_table;
} else {
ir_codes = &ir_codes_rc5_tv_table;
}
break;
case 0x30:
name = "KNC One";
ir->get_key = get_key_knc1;
ir_type = IR_TYPE_OTHER;
ir_codes = &ir_codes_empty_table;
break;
case 0x6b:
name = "FusionHDTV";
ir->get_key = get_key_fusionhdtv;
ir_type = IR_TYPE_RC5;
ir_codes = &ir_codes_fusionhdtv_mce_table;
break;
case 0x7a:
case 0x47:
case 0x71:
case 0x2d:
if (adap->id == I2C_HW_B_CX2388x ||
adap->id == I2C_HW_B_CX2341X) {
/* Handled by cx88-input */
name = adap->id == I2C_HW_B_CX2341X ? "CX2341x remote"
: "CX2388x remote";
ir_type = IR_TYPE_RC5;
ir->get_key = get_key_haup_xvr;
if (hauppauge == 1) {
ir_codes = &ir_codes_hauppauge_new_table;
} else {
ir_codes = &ir_codes_rc5_tv_table;
}
} else {
/* Handled by saa7134-input */
name = "SAA713x remote";
ir_type = IR_TYPE_OTHER;
}
break;
case 0x40:
name = "AVerMedia Cardbus remote";
ir->get_key = get_key_avermedia_cardbus;
ir_type = IR_TYPE_OTHER;
ir_codes = &ir_codes_avermedia_cardbus_table;
break;
default:
dprintk(1, DEVNAME ": Unsupported i2c address 0x%02x\n", addr);
err = -ENODEV;
goto err_out_free;
}
/* Let the caller override settings */
if (client->dev.platform_data) {
const struct IR_i2c_init_data *init_data =
client->dev.platform_data;
ir_codes = init_data->ir_codes;
name = init_data->name;
if (init_data->type)
ir_type = init_data->type;
switch (init_data->internal_get_key_func) {
case IR_KBD_GET_KEY_CUSTOM:
/* The bridge driver provided us its own function */
ir->get_key = init_data->get_key;
break;
case IR_KBD_GET_KEY_PIXELVIEW:
ir->get_key = get_key_pixelview;
break;
case IR_KBD_GET_KEY_PV951:
ir->get_key = get_key_pv951;
break;
case IR_KBD_GET_KEY_HAUP:
ir->get_key = get_key_haup;
break;
case IR_KBD_GET_KEY_KNC1:
ir->get_key = get_key_knc1;
break;
case IR_KBD_GET_KEY_FUSIONHDTV:
ir->get_key = get_key_fusionhdtv;
break;
case IR_KBD_GET_KEY_HAUP_XVR:
ir->get_key = get_key_haup_xvr;
break;
case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
ir->get_key = get_key_avermedia_cardbus;
break;
}
}
/* Make sure we are all setup before going on */
if (!name || !ir->get_key || !ir_codes) {
dprintk(1, DEVNAME ": Unsupported device at address 0x%02x\n",
addr);
err = -ENODEV;
goto err_out_free;
}
/* Sets name */
snprintf(ir->name, sizeof(ir->name), "i2c IR (%s)", name);
ir->ir_codes = ir_codes;
snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
dev_name(&adap->dev),
dev_name(&client->dev));
/* init + register input device */
ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);
input_dev->id.bustype = BUS_I2C;
input_dev->name = ir->name;
input_dev->phys = ir->phys;
err = input_register_device(ir->input);
if (err)
goto err_out_free;
printk(DEVNAME ": %s detected at %s [%s]\n",
ir->input->name, ir->input->phys, adap->name);
/* start polling via eventd */
INIT_DELAYED_WORK(&ir->work, ir_work);
schedule_delayed_work(&ir->work, 0);
return 0;
err_out_free:
input_free_device(input_dev);
kfree(ir);
return err;
}
static int ir_remove(struct i2c_client *client)
{
struct IR_i2c *ir = i2c_get_clientdata(client);
/* kill outstanding polls */
cancel_delayed_work_sync(&ir->work);
/* unregister device */
input_unregister_device(ir->input);
/* free memory */
kfree(ir);
return 0;
}
static const struct i2c_device_id ir_kbd_id[] = {
/* Generic entry for any IR receiver */
{ "ir_video", 0 },
/* IR device specific entries should be added here */
{ "ir_rx_z8f0811_haup", 0 },
{ }
};
static struct i2c_driver driver = {
.driver = {
.name = "ir-kbd-i2c",
},
.probe = ir_probe,
.remove = ir_remove,
.id_table = ir_kbd_id,
};
/* ----------------------------------------------------------------------- */
MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
MODULE_DESCRIPTION("input driver for i2c IR remote controls");
MODULE_LICENSE("GPL");
static int __init ir_init(void)
{
return i2c_add_driver(&driver);
}
static void __exit ir_fini(void)
{
i2c_del_driver(&driver);
}
module_init(ir_init);
module_exit(ir_fini);
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/
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