| /* |
| * 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); |