/* * 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 * modified for PixelView (BT878P+W/FM) by * Michal Kochanowicz * Christoph Bartelmus * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by * Ulrich Mueller * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by * Stefan Jahn * modified for inclusion into kernel sources by * Jerome Brock * 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 #include #include #include #include #include #include #include #include #include #include #include #include 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<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);