7e32c5b0c29d03d12ccf4fc89588d9193b8c3b1c
[linux-2.6.git] / drivers / media / video / upd64083.c
1 /*
2  * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
3  *
4  * 2003 by T.Adachi (tadachi@tadachi-net.com)
5  * 2003 by Takeru KOMORIYA <komoriya@paken.org>
6  * 2006 by Hans Verkuil <hverkuil@xs4all.nl>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * as published by the Free Software Foundation; either version 2
11  * of the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21  */
22
23 #include <linux/version.h>
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/i2c.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-common.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <media/v4l2-i2c-drv-legacy.h>
31 #include <media/upd64083.h>
32
33 MODULE_DESCRIPTION("uPD64083 driver");
34 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
35 MODULE_LICENSE("GPL");
36
37 static int debug = 0;
38 module_param(debug, bool, 0644);
39
40 MODULE_PARM_DESC(debug, "Debug level (0-1)");
41
42 static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };
43
44
45 I2C_CLIENT_INSMOD;
46
47 enum {
48         R00 = 0, R01, R02, R03, R04,
49         R05, R06, R07, R08, R09,
50         R0A, R0B, R0C, R0D, R0E, R0F,
51         R10, R11, R12, R13, R14,
52         R15, R16,
53         TOT_REGS
54 };
55
56 struct upd64083_state {
57         u8 mode;
58         u8 ext_y_adc;
59         u8 regs[TOT_REGS];
60 };
61
62 /* Initial values when used in combination with the
63    NEC upd64031a ghost reduction chip. */
64 static u8 upd64083_init[] = {
65         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
66         0x36, 0xdd, 0x05, 0x56, 0x48,
67         0x00, 0x3a, 0xa0, 0x05, 0x08,
68         0x44, 0x60, 0x08, 0x52, 0xf8,
69         0x53, 0x60, 0x10
70 };
71
72 /* ------------------------------------------------------------------------ */
73
74 static void upd64083_log_status(struct i2c_client *client)
75 {
76         u8 buf[7];
77
78         i2c_master_recv(client, buf, 7);
79         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
80                       "SA04=%02x SA05=%02x SA06=%02x\n",
81                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
82 }
83
84 /* ------------------------------------------------------------------------ */
85
86 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
87 {
88         u8 buf[2];
89
90         buf[0] = reg;
91         buf[1] = val;
92         v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
93         if (i2c_master_send(client, buf, 2) != 2)
94                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
95 }
96
97 /* ------------------------------------------------------------------------ */
98
99 #ifdef CONFIG_VIDEO_ADV_DEBUG
100 static u8 upd64083_read(struct i2c_client *client, u8 reg)
101 {
102         u8 buf[7];
103
104         if (reg >= sizeof(buf))
105                 return 0xff;
106         i2c_master_recv(client, buf, sizeof(buf));
107         return buf[reg];
108 }
109 #endif
110
111 /* ------------------------------------------------------------------------ */
112
113 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
114 {
115         struct upd64083_state *state = i2c_get_clientdata(client);
116         struct v4l2_routing *route = arg;
117
118         switch (cmd) {
119         case VIDIOC_INT_G_VIDEO_ROUTING:
120                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
121                 route->output = 0;
122                 break;
123
124         case VIDIOC_INT_S_VIDEO_ROUTING:
125         {
126                 u8 r00, r02;
127
128                 if (route->input > 7 || (route->input & 6) == 6)
129                         return -EINVAL;
130                 state->mode = (route->input & 3) << 6;
131                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
132                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
133                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
134                 upd64083_write(client, R00, r00);
135                 upd64083_write(client, R02, r02);
136                 break;
137         }
138
139         case VIDIOC_LOG_STATUS:
140                 upd64083_log_status(client);
141                 break;
142
143 #ifdef CONFIG_VIDEO_ADV_DEBUG
144         case VIDIOC_DBG_G_REGISTER:
145         case VIDIOC_DBG_S_REGISTER:
146         {
147                 struct v4l2_register *reg = arg;
148
149                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
150                         return -EINVAL;
151                 if (!capable(CAP_SYS_ADMIN))
152                         return -EPERM;
153                 if (cmd == VIDIOC_DBG_G_REGISTER)
154                         reg->val = upd64083_read(client, reg->reg & 0xff);
155                 else
156                         upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
157                 break;
158         }
159 #endif
160
161         case VIDIOC_G_CHIP_IDENT:
162                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0);
163
164         default:
165                 break;
166         }
167
168         return 0;
169 }
170
171 /* ------------------------------------------------------------------------ */
172
173 /* i2c implementation */
174
175 static int upd64083_probe(struct i2c_client *client)
176 {
177         struct upd64083_state *state;
178         int i;
179
180         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
181                 return -EIO;
182
183         v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
184
185         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
186         if (state == NULL) {
187                 return -ENOMEM;
188         }
189         i2c_set_clientdata(client, state);
190         /* Initially assume that a ghost reduction chip is present */
191         state->mode = 0;  /* YCS mode */
192         state->ext_y_adc = (1 << 5);
193         memcpy(state->regs, upd64083_init, TOT_REGS);
194         for (i = 0; i < TOT_REGS; i++) {
195                 upd64083_write(client, i, state->regs[i]);
196         }
197         return 0;
198 }
199
200 static int upd64083_remove(struct i2c_client *client)
201 {
202         kfree(i2c_get_clientdata(client));
203         return 0;
204 }
205
206 /* ----------------------------------------------------------------------- */
207
208
209 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
210         .name = "upd64083",
211         .driverid = I2C_DRIVERID_UPD64083,
212         .command = upd64083_command,
213         .probe = upd64083_probe,
214         .remove = upd64083_remove,
215 };