[media] Remove staging/lirc/lirc_i2c driver

This driver duplicates the same functionality found at ir-kbd-i2c.
There were a few missing key parsers that were added by the previous
patches. The only thing left on lirc_i2c driver is the IR parsing
for Asus TV-Box and Creative/VisionTek BreakOut-Box.
Those devices use pcf8574 chip for IR.

They are old video adapters with TV tuners. Their code were never
merged upstream, and they are not chipped anymore. So, it is very
unlikely that someone would have interests on porting them to the
Linux Kernel.

Due to that, let's remove lirc_i2c, as all the remaining functionality
are already mapped via ir-kbd-i2c.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/staging/lirc/Kconfig

···
 	help
 	  Driver for the IR interface on BT829-based hardware
 
-config LIRC_I2C
-	tristate "I2C Based IR Receivers"
-	depends on LIRC && I2C
-	help
-	  Driver for I2C-based IR receivers, such as those commonly
-	  found onboard Hauppauge PVR-150/250/350 video capture cards
-
 config LIRC_IGORPLUGUSB
 	tristate "Igor Cesko's USB IR Receiver"
 	depends on LIRC && USB

drivers/staging/lirc/Makefile

···
 # Each configuration option enables a list of files.
 
 obj-$(CONFIG_LIRC_BT829)	+= lirc_bt829.o
-obj-$(CONFIG_LIRC_I2C)		+= lirc_i2c.o
 obj-$(CONFIG_LIRC_IGORPLUGUSB)	+= lirc_igorplugusb.o
 obj-$(CONFIG_LIRC_IMON)		+= lirc_imon.o
 obj-$(CONFIG_LIRC_IT87)		+= lirc_it87.o

drivers/staging/lirc/lirc_i2c.c

···
-/*
- * 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 <[e-mail]>
- * modified for PixelView (BT878P+W/FM) by
- *      Michal Kochanowicz <[e-mail]>
- *      Christoph Bartelmus <[e-mail]>
- * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
- *      Ulrich Mueller <[e-mail]>
- * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by
- *      Stefan Jahn <[e-mail]>
- * modified for inclusion into kernel sources by
- *      Jerome Brock <[e-mail]>
- * modified for Leadtek Winfast PVR2000 by
- *      Thomas Reitmayr ([e-mail])
- * modified for Hauppauge HVR-1300 by
- *      Jan Frey ([e-mail])
- *
- * 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);