+++ /dev/null
-/*
- * lirc_i2c.c
- *
- * i2c IR driver for the onboard IR port on many TV tuner cards, including:
- * -Flavors of the Hauppauge PVR-150/250/350
- * -Hauppauge HVR-1300
- * -PixelView (BT878P+W/FM)
- * -KNC ONE TV Station/Anubis Typhoon TView Tuner
- * -Asus TV-Box and Creative/VisionTek BreakOut-Box
- * -Leadtek Winfast PVR2000
- *
- * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
- * 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 Asus TV-Box and Creative/VisionTek BreakOut-Box by
- * Stefan Jahn <stefan@lkcc.org>
- * modified for inclusion into kernel sources by
- * Jerome Brock <jbrock@users.sourceforge.net>
- * modified for Leadtek Winfast PVR2000 by
- * Thomas Reitmayr (treitmayr@yahoo.com)
- * modified for Hauppauge HVR-1300 by
- * Jan Frey (jfrey@gmx.de)
- *
- * parts are cut&pasted from the old lirc_haup.c driver
- *
- * 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/version.h>
-#include <linux/module.h>
-#include <linux/kmod.h>
-#include <linux/kernel.h>
-#include <linux/sched.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-algo-bit.h>
-
-#include <media/lirc_dev.h>
-
-struct IR {
- struct lirc_driver l;
- struct i2c_client c;
- int nextkey;
- unsigned char b[3];
- unsigned char bits;
- unsigned char flag;
-};
-
-#define DEVICE_NAME "lirc_i2c"
-
-/* module parameters */
-static int debug; /* debug output */
-static int minor = -1; /* minor number */
-
-#define dprintk(fmt, args...) \
- do { \
- if (debug) \
- printk(KERN_DEBUG DEVICE_NAME ": " fmt, \
- ## args); \
- } while (0)
-
-static int reverse(int data, int bits)
-{
- int i;
- int c;
-
- for (c = 0, i = 0; i < bits; i++)
- c |= ((data & (1<<i)) ? 1 : 0) << (bits-1-i);
-
- return c;
-}
-
-static int add_to_buf_adap(void *data, struct lirc_buffer *buf)
-{
- struct IR *ir = data;
- unsigned char keybuf[4];
-
- keybuf[0] = 0x00;
- i2c_master_send(&ir->c, keybuf, 1);
- /* poll IR chip */
- if (i2c_master_recv(&ir->c, keybuf, sizeof(keybuf)) != sizeof(keybuf)) {
- dprintk("read error\n");
- return -EIO;
- }
-
- dprintk("key (0x%02x%02x%02x%02x)\n",
- keybuf[0], keybuf[1], keybuf[2], keybuf[3]);
-
- /* key pressed ? */
- if (keybuf[2] == 0xff)
- return -ENODATA;
-
- /* remove repeat bit */
- keybuf[2] &= 0x7f;
- keybuf[3] |= 0x80;
-
- lirc_buffer_write(buf, keybuf);
- return 0;
-}
-
-static int add_to_buf_pcf8574(void *data, struct lirc_buffer *buf)
-{
- struct IR *ir = data;
- int rc;
- unsigned char all, mask;
- unsigned char key;
-
- /* compute all valid bits (key code + pressed/release flag) */
- all = ir->bits | ir->flag;
-
- /* save IR writable mask bits */
- mask = i2c_smbus_read_byte(&ir->c) & ~all;
-
- /* send bit mask */
- rc = i2c_smbus_write_byte(&ir->c, (0xff & all) | mask);
-
- /* receive scan code */
- rc = i2c_smbus_read_byte(&ir->c);
-
- if (rc == -1) {
- dprintk("%s read error\n", ir->c.name);
- return -EIO;
- }
-
- /* drop duplicate polls */
- if (ir->b[0] == (rc & all))
- return -ENODATA;
-
- ir->b[0] = rc & all;
-
- dprintk("%s key 0x%02X %s\n", ir->c.name, rc & ir->bits,
- (rc & ir->flag) ? "released" : "pressed");
-
- /* ignore released buttons */
- if (rc & ir->flag)
- return -ENODATA;
-
- /* set valid key code */
- key = rc & ir->bits;
- lirc_buffer_write(buf, &key);
- return 0;
-}
-
-/* common for Hauppauge IR receivers */
-static int add_to_buf_haup_common(void *data, struct lirc_buffer *buf,
- unsigned char *keybuf, int size, int offset)
-{
- struct IR *ir = data;
- __u16 code;
- unsigned char codes[2];
- int ret;
-
- /* poll IR chip */
- ret = i2c_master_recv(&ir->c, keybuf, size);
- if (ret == size) {
- ir->b[0] = keybuf[offset];
- ir->b[1] = keybuf[offset+1];
- ir->b[2] = keybuf[offset+2];
- if (ir->b[0] != 0x00 && ir->b[1] != 0x00)
- dprintk("key (0x%02x/0x%02x)\n", ir->b[0], ir->b[1]);
- } else {
- dprintk("read error (ret=%d)\n", ret);
- /* keep last successful read buffer */
- }
-
- /* key pressed ? */
- if ((ir->b[0] & 0x80) == 0)
- return -ENODATA;
-
- /* look what we have */
- code = (((__u16)ir->b[0]&0x7f)<<6) | (ir->b[1]>>2);
-
- codes[0] = (code >> 8) & 0xff;
- codes[1] = code & 0xff;
-
- /* return it */
- dprintk("sending code 0x%02x%02x to lirc\n", codes[0], codes[1]);
- lirc_buffer_write(buf, codes);
- return 0;
-}
-
-/* specific for the Hauppauge PVR150 IR receiver */
-static int add_to_buf_haup_pvr150(void *data, struct lirc_buffer *buf)
-{
- unsigned char keybuf[6];
- /* fetch 6 bytes, first relevant is at offset 3 */
- return add_to_buf_haup_common(data, buf, keybuf, 6, 3);
-}
-
-/* used for all Hauppauge IR receivers but the PVR150 */
-static int add_to_buf_haup(void *data, struct lirc_buffer *buf)
-{
- unsigned char keybuf[3];
- /* fetch 3 bytes, first relevant is at offset 0 */
- return add_to_buf_haup_common(data, buf, keybuf, 3, 0);
-}
-
-
-static int add_to_buf_pvr2000(void *data, struct lirc_buffer *buf)
-{
- struct IR *ir = data;
- unsigned char key;
- s32 flags;
- s32 code;
-
- /* poll IR chip */
- flags = i2c_smbus_read_byte_data(&ir->c, 0x10);
- if (-1 == flags) {
- dprintk("read error\n");
- return -ENODATA;
- }
- /* key pressed ? */
- if (0 == (flags & 0x80))
- return -ENODATA;
-
- /* read actual key code */
- code = i2c_smbus_read_byte_data(&ir->c, 0x00);
- if (-1 == code) {
- dprintk("read error\n");
- return -ENODATA;
- }
-
- key = code & 0xFF;
-
- dprintk("IR Key/Flags: (0x%02x/0x%02x)\n", key, flags & 0xFF);
-
- /* return it */
- lirc_buffer_write(buf, &key);
- return 0;
-}
-
-static int add_to_buf_pixelview(void *data, struct lirc_buffer *buf)
-{
- struct IR *ir = data;
- unsigned char key;
-
- /* poll IR chip */
- if (1 != i2c_master_recv(&ir->c, &key, 1)) {
- dprintk("read error\n");
- return -1;
- }
- dprintk("key %02x\n", key);
-
- /* return it */
- lirc_buffer_write(buf, &key);
- return 0;
-}
-
-static int add_to_buf_pv951(void *data, struct lirc_buffer *buf)
-{
- struct IR *ir = data;
- unsigned char key;
- unsigned char codes[4];
-
- /* poll IR chip */
- if (1 != i2c_master_recv(&ir->c, &key, 1)) {
- dprintk("read error\n");
- return -ENODATA;
- }
- /* ignore 0xaa */
- if (key == 0xaa)
- return -ENODATA;
- dprintk("key %02x\n", key);
-
- codes[0] = 0x61;
- codes[1] = 0xD6;
- codes[2] = reverse(key, 8);
- codes[3] = (~codes[2])&0xff;
-
- lirc_buffer_write(buf, codes);
- return 0;
-}
-
-static int add_to_buf_knc1(void *data, struct lirc_buffer *buf)
-{
- static unsigned char last_key = 0xFF;
- struct IR *ir = data;
- unsigned char key;
-
- /* poll IR chip */
- if (1 != i2c_master_recv(&ir->c, &key, 1)) {
- dprintk("read error\n");
- return -ENODATA;
- }
-
- /*
- * it seems that 0xFE indicates that a button is still held
- * down, while 0xFF indicates that no button is held
- * down. 0xFE sequences are sometimes interrupted by 0xFF
- */
-
- dprintk("key %02x\n", key);
-
- if (key == 0xFF)
- return -ENODATA;
-
- if (key == 0xFE)
- key = last_key;
-
- last_key = key;
- lirc_buffer_write(buf, &key);
-
- return 0;
-}
-
-static int set_use_inc(void *data)
-{
- struct IR *ir = data;
-
- dprintk("%s called\n", __func__);
-
- /* lock bttv in memory while /dev/lirc is in use */
- i2c_use_client(&ir->c);
-
- return 0;
-}
-
-static void set_use_dec(void *data)
-{
- struct IR *ir = data;
-
- dprintk("%s called\n", __func__);
-
- i2c_release_client(&ir->c);
-}
-
-static struct lirc_driver lirc_template = {
- .name = "lirc_i2c",
- .set_use_inc = set_use_inc,
- .set_use_dec = set_use_dec,
- .dev = NULL,
- .owner = THIS_MODULE,
-};
-
-static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id);
-static int ir_remove(struct i2c_client *client);
-static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg);
-
-static const struct i2c_device_id ir_receiver_id[] = {
- /* Generic entry for any IR receiver */
- { "ir_video", 0 },
- /* IR device specific entries could be added here */
- { }
-};
-
-static struct i2c_driver driver = {
- .driver = {
- .owner = THIS_MODULE,
- .name = "i2c ir driver",
- },
- .probe = ir_probe,
- .remove = ir_remove,
- .id_table = ir_receiver_id,
- .command = ir_command,
-};
-
-static void pcf_probe(struct i2c_client *client, struct IR *ir)
-{
- int ret1, ret2, ret3, ret4;
-
- ret1 = i2c_smbus_write_byte(client, 0xff);
- ret2 = i2c_smbus_read_byte(client);
- ret3 = i2c_smbus_write_byte(client, 0x00);
- ret4 = i2c_smbus_read_byte(client);
-
- /* in the Asus TV-Box: bit 1-0 */
- if (((ret2 & 0x03) == 0x03) && ((ret4 & 0x03) == 0x00)) {
- ir->bits = (unsigned char) ~0x07;
- ir->flag = 0x04;
- /* in the Creative/VisionTek BreakOut-Box: bit 7-6 */
- } else if (((ret2 & 0xc0) == 0xc0) && ((ret4 & 0xc0) == 0x00)) {
- ir->bits = (unsigned char) ~0xe0;
- ir->flag = 0x20;
- }
-
- return;
-}
-
-static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
-{
- struct IR *ir;
- struct i2c_adapter *adap = client->adapter;
- unsigned short addr = client->addr;
- int retval;
-
- ir = kzalloc(sizeof(struct IR), GFP_KERNEL);
- if (!ir)
- return -ENOMEM;
- memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver));
- memcpy(&ir->c, client, sizeof(struct i2c_client));
-
- i2c_set_clientdata(client, ir);
- ir->l.data = ir;
- ir->l.minor = minor;
- ir->l.sample_rate = 10;
- ir->l.dev = &ir->c.dev;
- ir->nextkey = -1;
-
- switch (addr) {
- case 0x64:
- strlcpy(ir->c.name, "Pixelview IR", I2C_NAME_SIZE);
- ir->l.code_length = 8;
- ir->l.add_to_buf = add_to_buf_pixelview;
- break;
- case 0x4b:
- strlcpy(ir->c.name, "PV951 IR", I2C_NAME_SIZE);
- ir->l.code_length = 32;
- ir->l.add_to_buf = add_to_buf_pv951;
- break;
- case 0x71:
- if (adap->id == I2C_HW_B_CX2388x)
- strlcpy(ir->c.name, "Hauppauge HVR1300", I2C_NAME_SIZE);
- else /* bt8xx or cx2341x */
- /*
- * The PVR150 IR receiver uses the same protocol as
- * other Hauppauge cards, but the data flow is
- * different, so we need to deal with it by its own.
- */
- strlcpy(ir->c.name, "Hauppauge PVR150", I2C_NAME_SIZE);
- ir->l.code_length = 13;
- ir->l.add_to_buf = add_to_buf_haup_pvr150;
- break;
- case 0x6b:
- strlcpy(ir->c.name, "Adaptec IR", I2C_NAME_SIZE);
- ir->l.code_length = 32;
- ir->l.add_to_buf = add_to_buf_adap;
- break;
- case 0x18:
- case 0x1a:
- if (adap->id == I2C_HW_B_CX2388x) {
- strlcpy(ir->c.name, "Leadtek IR", I2C_NAME_SIZE);
- ir->l.code_length = 8;
- ir->l.add_to_buf = add_to_buf_pvr2000;
- } else { /* bt8xx or cx2341x */
- strlcpy(ir->c.name, "Hauppauge IR", I2C_NAME_SIZE);
- ir->l.code_length = 13;
- ir->l.add_to_buf = add_to_buf_haup;
- }
- break;
- case 0x30:
- strlcpy(ir->c.name, "KNC ONE IR", I2C_NAME_SIZE);
- ir->l.code_length = 8;
- ir->l.add_to_buf = add_to_buf_knc1;
- break;
- case 0x21:
- case 0x23:
- pcf_probe(client, ir);
- strlcpy(ir->c.name, "TV-Box IR", I2C_NAME_SIZE);
- ir->l.code_length = 8;
- ir->l.add_to_buf = add_to_buf_pcf8574;
- break;
- default:
- /* shouldn't happen */
- printk("lirc_i2c: Huh? unknown i2c address (0x%02x)?\n", addr);
- kfree(ir);
- return -EINVAL;
- }
- printk(KERN_INFO "lirc_i2c: chip 0x%x found @ 0x%02x (%s)\n",
- adap->id, addr, ir->c.name);
-
- retval = lirc_register_driver(&ir->l);
-
- if (retval < 0) {
- printk(KERN_ERR "lirc_i2c: failed to register driver!\n");
- kfree(ir);
- return retval;
- }
-
- ir->l.minor = retval;
-
- return 0;
-}
-
-static int ir_remove(struct i2c_client *client)
-{
- struct IR *ir = i2c_get_clientdata(client);
-
- /* unregister device */
- lirc_unregister_driver(ir->l.minor);
-
- /* free memory */
- kfree(ir);
- return 0;
-}
-
-static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg)
-{
- /* nothing */
- return 0;
-}
-
-static int __init lirc_i2c_init(void)
-{
- i2c_add_driver(&driver);
- return 0;
-}
-
-static void __exit lirc_i2c_exit(void)
-{
- i2c_del_driver(&driver);
-}
-
-MODULE_DESCRIPTION("Infrared receiver driver for Hauppauge and "
- "Pixelview cards (i2c stack)");
-MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, "
- "Ulrich Mueller, Stefan Jahn, Jerome Brock");
-MODULE_LICENSE("GPL");
-
-module_param(minor, int, S_IRUGO);
-MODULE_PARM_DESC(minor, "Preferred minor device number");
-
-module_param(debug, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Enable debugging messages");
-
-module_init(lirc_i2c_init);
-module_exit(lirc_i2c_exit);
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff