2 * bt856 - BT856A Digital Video Encoder (Rockwell Part)
4 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
7 * Modifications for LML33/DC10plus unified driver
8 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
10 * This code was modify/ported from the saa7111 driver written
13 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
14 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/delay.h>
34 #include <linux/errno.h>
36 #include <linux/kernel.h>
37 #include <linux/major.h>
38 #include <linux/slab.h>
40 #include <linux/pci.h>
41 #include <linux/signal.h>
43 #include <asm/pgtable.h>
45 #include <linux/sched.h>
46 #include <linux/types.h>
48 #include <linux/videodev.h>
49 #include <asm/uaccess.h>
51 MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
52 MODULE_AUTHOR("Mike Bernson & Dave Perks");
53 MODULE_LICENSE("GPL");
55 #include <linux/i2c.h>
57 #define I2C_NAME(s) (s)->name
59 #include <linux/video_encoder.h>
62 module_param(debug, int, 0);
63 MODULE_PARM_DESC(debug, "Debug level (0-1)");
65 #define dprintk(num, format, args...) \
68 printk(format, ##args); \
71 /* ----------------------------------------------------------------------- */
73 #define REG_OFFSET 0xCE
76 unsigned char reg[32];
86 #define I2C_BT856 0x88
88 /* ----------------------------------------------------------------------- */
91 bt856_write (struct i2c_client *client,
95 struct bt856 *encoder = i2c_get_clientdata(client);
97 encoder->reg[reg - REG_OFFSET] = value;
98 return i2c_smbus_write_byte_data(client, reg, value);
102 bt856_setbit (struct i2c_client *client,
107 struct bt856 *encoder = i2c_get_clientdata(client);
109 return bt856_write(client, reg,
111 reg[reg - REG_OFFSET] & ~(1 << bit)) |
112 (value ? (1 << bit) : 0));
116 bt856_dump (struct i2c_client *client)
119 struct bt856 *encoder = i2c_get_clientdata(client);
121 printk(KERN_INFO "%s: register dump:", I2C_NAME(client));
122 for (i = 0xd6; i <= 0xde; i += 2)
123 printk(" %02x", encoder->reg[i - REG_OFFSET]);
127 /* ----------------------------------------------------------------------- */
130 bt856_command (struct i2c_client *client,
134 struct bt856 *encoder = i2c_get_clientdata(client);
139 /* This is just for testing!!! */
140 dprintk(1, KERN_INFO "bt856: init\n");
141 bt856_write(client, 0xdc, 0x18);
142 bt856_write(client, 0xda, 0);
143 bt856_write(client, 0xde, 0);
145 bt856_setbit(client, 0xdc, 3, 1);
146 //bt856_setbit(client, 0xdc, 6, 0);
147 bt856_setbit(client, 0xdc, 4, 1);
149 switch (encoder->norm) {
151 case VIDEO_MODE_NTSC:
152 bt856_setbit(client, 0xdc, 2, 0);
156 bt856_setbit(client, 0xdc, 2, 1);
160 bt856_setbit(client, 0xdc, 1, 1);
161 bt856_setbit(client, 0xde, 4, 0);
162 bt856_setbit(client, 0xde, 3, 1);
167 case ENCODER_GET_CAPABILITIES:
169 struct video_encoder_capability *cap = arg;
171 dprintk(1, KERN_INFO "%s: get capabilities\n",
174 cap->flags = VIDEO_ENCODER_PAL |
182 case ENCODER_SET_NORM:
186 dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client),
191 case VIDEO_MODE_NTSC:
192 bt856_setbit(client, 0xdc, 2, 0);
196 bt856_setbit(client, 0xdc, 2, 1);
197 bt856_setbit(client, 0xda, 0, 0);
198 //bt856_setbit(client, 0xda, 0, 1);
205 encoder->norm = *iarg;
211 case ENCODER_SET_INPUT:
215 dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client),
218 /* We only have video bus.
219 * iarg = 0: input is from bt819
220 * iarg = 1: input is from ZR36060 */
225 bt856_setbit(client, 0xde, 4, 0);
226 bt856_setbit(client, 0xde, 3, 1);
227 bt856_setbit(client, 0xdc, 3, 1);
228 bt856_setbit(client, 0xdc, 6, 0);
231 bt856_setbit(client, 0xde, 4, 0);
232 bt856_setbit(client, 0xde, 3, 1);
233 bt856_setbit(client, 0xdc, 3, 1);
234 bt856_setbit(client, 0xdc, 6, 1);
237 bt856_setbit(client, 0xdc, 3, 0);
238 bt856_setbit(client, 0xde, 4, 1);
250 case ENCODER_SET_OUTPUT:
254 dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client),
257 /* not much choice of outputs */
264 case ENCODER_ENABLE_OUTPUT:
268 encoder->enable = !!*iarg;
270 dprintk(1, KERN_INFO "%s: enable output %d\n",
271 I2C_NAME(client), encoder->enable);
282 /* ----------------------------------------------------------------------- */
286 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
288 static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END };
290 static unsigned short ignore = I2C_CLIENT_END;
292 static struct i2c_client_address_data addr_data = {
293 .normal_i2c = normal_i2c,
298 static struct i2c_driver i2c_driver_bt856;
301 bt856_detect_client (struct i2c_adapter *adapter,
306 struct i2c_client *client;
307 struct bt856 *encoder;
311 "bt856.c: detecting bt856 client on address 0x%x\n",
314 /* Check if the adapter supports the needed features */
315 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
318 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
321 client->addr = address;
322 client->adapter = adapter;
323 client->driver = &i2c_driver_bt856;
324 strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client)));
326 encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL);
327 if (encoder == NULL) {
331 encoder->norm = VIDEO_MODE_NTSC;
333 i2c_set_clientdata(client, encoder);
335 i = i2c_attach_client(client);
342 bt856_write(client, 0xdc, 0x18);
343 bt856_write(client, 0xda, 0);
344 bt856_write(client, 0xde, 0);
346 bt856_setbit(client, 0xdc, 3, 1);
347 //bt856_setbit(client, 0xdc, 6, 0);
348 bt856_setbit(client, 0xdc, 4, 1);
350 switch (encoder->norm) {
352 case VIDEO_MODE_NTSC:
353 bt856_setbit(client, 0xdc, 2, 0);
357 bt856_setbit(client, 0xdc, 2, 1);
361 bt856_setbit(client, 0xdc, 1, 1);
362 bt856_setbit(client, 0xde, 4, 0);
363 bt856_setbit(client, 0xde, 3, 1);
368 dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client),
375 bt856_attach_adapter (struct i2c_adapter *adapter)
379 "bt856.c: starting probe for adapter %s (0x%x)\n",
380 I2C_NAME(adapter), adapter->id);
381 return i2c_probe(adapter, &addr_data, &bt856_detect_client);
385 bt856_detach_client (struct i2c_client *client)
387 struct bt856 *encoder = i2c_get_clientdata(client);
390 err = i2c_detach_client(client);
401 /* ----------------------------------------------------------------------- */
403 static struct i2c_driver i2c_driver_bt856 = {
408 .id = I2C_DRIVERID_BT856,
410 .attach_adapter = bt856_attach_adapter,
411 .detach_client = bt856_detach_client,
412 .command = bt856_command,
418 return i2c_add_driver(&i2c_driver_bt856);
424 i2c_del_driver(&i2c_driver_bt856);
427 module_init(bt856_init);
428 module_exit(bt856_exit);