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/types.h>
33 #include <linux/ioctl.h>
34 #include <asm/uaccess.h>
35 #include <linux/i2c.h>
36 #include <linux/i2c-id.h>
37 #include <linux/videodev.h>
38 #include <linux/video_encoder.h>
39 #include <media/v4l2-common.h>
40 #include <media/v4l2-i2c-drv-legacy.h>
42 MODULE_DESCRIPTION("Brooktree-856A video encoder driver");
43 MODULE_AUTHOR("Mike Bernson & Dave Perks");
44 MODULE_LICENSE("GPL");
47 module_param(debug
, int, 0);
48 MODULE_PARM_DESC(debug
, "Debug level (0-1)");
50 /* ----------------------------------------------------------------------- */
52 #define BT856_REG_OFFSET 0xDA
53 #define BT856_NR_REG 6
56 unsigned char reg
[BT856_NR_REG
];
62 /* ----------------------------------------------------------------------- */
64 static inline int bt856_write(struct i2c_client
*client
, u8 reg
, u8 value
)
66 struct bt856
*encoder
= i2c_get_clientdata(client
);
68 encoder
->reg
[reg
- BT856_REG_OFFSET
] = value
;
69 return i2c_smbus_write_byte_data(client
, reg
, value
);
72 static inline int bt856_setbit(struct i2c_client
*client
, u8 reg
, u8 bit
, u8 value
)
74 struct bt856
*encoder
= i2c_get_clientdata(client
);
76 return bt856_write(client
, reg
,
77 (encoder
->reg
[reg
- BT856_REG_OFFSET
] & ~(1 << bit
)) |
78 (value
? (1 << bit
) : 0));
81 static void bt856_dump(struct i2c_client
*client
)
84 struct bt856
*encoder
= i2c_get_clientdata(client
);
86 v4l_info(client
, "register dump:\n");
87 for (i
= 0; i
< BT856_NR_REG
; i
+= 2)
88 printk(KERN_CONT
" %02x", encoder
->reg
[i
]);
89 printk(KERN_CONT
"\n");
92 /* ----------------------------------------------------------------------- */
94 static int bt856_command(struct i2c_client
*client
, unsigned cmd
, void *arg
)
96 struct bt856
*encoder
= i2c_get_clientdata(client
);
100 /* This is just for testing!!! */
101 v4l_dbg(1, debug
, client
, "init\n");
102 bt856_write(client
, 0xdc, 0x18);
103 bt856_write(client
, 0xda, 0);
104 bt856_write(client
, 0xde, 0);
106 bt856_setbit(client
, 0xdc, 3, 1);
107 //bt856_setbit(client, 0xdc, 6, 0);
108 bt856_setbit(client
, 0xdc, 4, 1);
110 switch (encoder
->norm
) {
111 case VIDEO_MODE_NTSC
:
112 bt856_setbit(client
, 0xdc, 2, 0);
116 bt856_setbit(client
, 0xdc, 2, 1);
120 bt856_setbit(client
, 0xdc, 1, 1);
121 bt856_setbit(client
, 0xde, 4, 0);
122 bt856_setbit(client
, 0xde, 3, 1);
127 case ENCODER_GET_CAPABILITIES
:
129 struct video_encoder_capability
*cap
= arg
;
131 v4l_dbg(1, debug
, client
, "get capabilities\n");
133 cap
->flags
= VIDEO_ENCODER_PAL
|
141 case ENCODER_SET_NORM
:
145 v4l_dbg(1, debug
, client
, "set norm %d\n", *iarg
);
148 case VIDEO_MODE_NTSC
:
149 bt856_setbit(client
, 0xdc, 2, 0);
153 bt856_setbit(client
, 0xdc, 2, 1);
154 bt856_setbit(client
, 0xda, 0, 0);
155 //bt856_setbit(client, 0xda, 0, 1);
161 encoder
->norm
= *iarg
;
167 case ENCODER_SET_INPUT
:
171 v4l_dbg(1, debug
, client
, "set input %d\n", *iarg
);
173 /* We only have video bus.
174 * iarg = 0: input is from bt819
175 * iarg = 1: input is from ZR36060 */
178 bt856_setbit(client
, 0xde, 4, 0);
179 bt856_setbit(client
, 0xde, 3, 1);
180 bt856_setbit(client
, 0xdc, 3, 1);
181 bt856_setbit(client
, 0xdc, 6, 0);
184 bt856_setbit(client
, 0xde, 4, 0);
185 bt856_setbit(client
, 0xde, 3, 1);
186 bt856_setbit(client
, 0xdc, 3, 1);
187 bt856_setbit(client
, 0xdc, 6, 1);
190 bt856_setbit(client
, 0xdc, 3, 0);
191 bt856_setbit(client
, 0xde, 4, 1);
202 case ENCODER_SET_OUTPUT
:
206 v4l_dbg(1, debug
, client
, "set output %d\n", *iarg
);
208 /* not much choice of outputs */
214 case ENCODER_ENABLE_OUTPUT
:
218 encoder
->enable
= !!*iarg
;
220 v4l_dbg(1, debug
, client
, "enable output %d\n", encoder
->enable
);
231 /* ----------------------------------------------------------------------- */
233 static unsigned short normal_i2c
[] = { 0x88 >> 1, I2C_CLIENT_END
};
237 static int bt856_probe(struct i2c_client
*client
,
238 const struct i2c_device_id
*id
)
240 struct bt856
*encoder
;
242 /* Check if the adapter supports the needed features */
243 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_SMBUS_BYTE_DATA
))
246 v4l_info(client
, "chip found @ 0x%x (%s)\n",
247 client
->addr
<< 1, client
->adapter
->name
);
249 encoder
= kzalloc(sizeof(struct bt856
), GFP_KERNEL
);
252 encoder
->norm
= VIDEO_MODE_NTSC
;
254 i2c_set_clientdata(client
, encoder
);
256 bt856_write(client
, 0xdc, 0x18);
257 bt856_write(client
, 0xda, 0);
258 bt856_write(client
, 0xde, 0);
260 bt856_setbit(client
, 0xdc, 3, 1);
261 //bt856_setbit(client, 0xdc, 6, 0);
262 bt856_setbit(client
, 0xdc, 4, 1);
264 switch (encoder
->norm
) {
266 case VIDEO_MODE_NTSC
:
267 bt856_setbit(client
, 0xdc, 2, 0);
271 bt856_setbit(client
, 0xdc, 2, 1);
275 bt856_setbit(client
, 0xdc, 1, 1);
276 bt856_setbit(client
, 0xde, 4, 0);
277 bt856_setbit(client
, 0xde, 3, 1);
284 static int bt856_remove(struct i2c_client
*client
)
286 kfree(i2c_get_clientdata(client
));
290 static const struct i2c_device_id bt856_id
[] = {
294 MODULE_DEVICE_TABLE(i2c
, bt856_id
);
296 static struct v4l2_i2c_driver_data v4l2_i2c_data
= {
298 .driverid
= I2C_DRIVERID_BT856
,
299 .command
= bt856_command
,
300 .probe
= bt856_probe
,
301 .remove
= bt856_remove
,
302 .id_table
= bt856_id
,