0318432d85f8f51057a094c228e58ea3e49fc62b
[linux-2.6.git] / drivers / media / video / upd64031a.c
1 /*
2  * upd64031A - NEC Electronics Ghost Reduction for NTSC in Japan
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 modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (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., 675 Mass Ave, Cambridge, MA 02139, USA.
21  */
22
23
24 #include <linux/version.h>
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/i2c.h>
28 #include <linux/videodev2.h>
29 #include <media/v4l2-common.h>
30 #include <media/v4l2-chip-ident.h>
31 #include <media/v4l2-i2c-drv-legacy.h>
32 #include <media/upd64031a.h>
33
34 // --------------------- read registers functions define -----------------------
35
36 /* bit masks */
37 #define GR_MODE_MASK              0xc0
38 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
39 #define SYNC_CIRCUIT_MASK         0xa0
40
41 // -----------------------------------------------------------------------------
42
43 MODULE_DESCRIPTION("uPD64031A driver");
44 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
45 MODULE_LICENSE("GPL");
46
47 static int debug = 0;
48 module_param(debug, int, 0644);
49
50 MODULE_PARM_DESC(debug, "Debug level (0-1)");
51
52 static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
53
54
55 I2C_CLIENT_INSMOD;
56
57 enum {
58         R00 = 0, R01, R02, R03, R04,
59         R05, R06, R07, R08, R09,
60         R0A, R0B, R0C, R0D, R0E, R0F,
61         /* unused registers
62          R10, R11, R12, R13, R14,
63          R15, R16, R17,
64          */
65         TOT_REGS
66 };
67
68 struct upd64031a_state {
69         u8 regs[TOT_REGS];
70         u8 gr_mode;
71         u8 direct_3dycs_connect;
72         u8 ext_comp_sync;
73         u8 ext_vert_sync;
74 };
75
76 static u8 upd64031a_init[] = {
77         0x00, 0xb8, 0x48, 0xd2, 0xe6,
78         0x03, 0x10, 0x0b, 0xaf, 0x7f,
79         0x00, 0x00, 0x1d, 0x5e, 0x00,
80         0xd0
81 };
82
83 /* ------------------------------------------------------------------------ */
84
85 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
86 {
87         u8 buf[2];
88
89         if (reg >= sizeof(buf))
90                 return 0xff;
91         i2c_master_recv(client, buf, 2);
92         return buf[reg];
93 }
94
95 /* ------------------------------------------------------------------------ */
96
97 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
98 {
99         u8 buf[2];
100
101         buf[0] = reg;
102         buf[1] = val;
103         v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
104         if (i2c_master_send(client, buf, 2) != 2)
105                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
106 }
107
108 /* ------------------------------------------------------------------------ */
109
110 /* The input changed due to new input or channel changed */
111 static void upd64031a_change(struct i2c_client *client)
112 {
113         struct upd64031a_state *state = i2c_get_clientdata(client);
114         u8 reg = state->regs[R00];
115
116         v4l_dbg(1, debug, client, "changed input or channel\n");
117         upd64031a_write(client, R00, reg | 0x10);
118         upd64031a_write(client, R00, reg & ~0x10);
119 }
120
121 /* ------------------------------------------------------------------------ */
122
123 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
124 {
125         struct upd64031a_state *state = i2c_get_clientdata(client);
126         struct v4l2_routing *route = arg;
127
128         switch (cmd) {
129         case VIDIOC_S_FREQUENCY:
130                 upd64031a_change(client);
131                 break;
132
133         case VIDIOC_INT_G_VIDEO_ROUTING:
134                 route->input = (state->gr_mode >> 6) |
135                         (state->direct_3dycs_connect >> 4) |
136                         (state->ext_comp_sync >> 1) |
137                         (state->ext_vert_sync >> 2);
138                 route->output = 0;
139                 break;
140
141         case VIDIOC_INT_S_VIDEO_ROUTING:
142         {
143                 u8 r00, r05, r08;
144
145                 state->gr_mode = (route->input & 3) << 6;
146                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
147                 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
148                 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
149                 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
150                 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
151                         state->ext_comp_sync | state->ext_vert_sync;
152                 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
153                         state->direct_3dycs_connect;
154                 upd64031a_write(client, R00, r00);
155                 upd64031a_write(client, R05, r05);
156                 upd64031a_write(client, R08, r08);
157                 upd64031a_change(client);
158                 break;
159         }
160
161         case VIDIOC_LOG_STATUS:
162                 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
163                         upd64031a_read(client, 0), upd64031a_read(client, 1));
164                 break;
165
166 #ifdef CONFIG_VIDEO_ADV_DEBUG
167         case VIDIOC_DBG_G_REGISTER:
168         case VIDIOC_DBG_S_REGISTER:
169         {
170                 struct v4l2_register *reg = arg;
171
172                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
173                         return -EINVAL;
174                 if (!capable(CAP_SYS_ADMIN))
175                         return -EPERM;
176                 if (cmd == VIDIOC_DBG_G_REGISTER)
177                         reg->val = upd64031a_read(client, reg->reg & 0xff);
178                 else
179                         upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
180                 break;
181         }
182 #endif
183
184         case VIDIOC_G_CHIP_IDENT:
185                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0);
186
187         default:
188                 break;
189         }
190         return 0;
191 }
192
193 /* ------------------------------------------------------------------------ */
194
195 /* i2c implementation */
196
197 static int upd64031a_probe(struct i2c_client *client)
198 {
199         struct upd64031a_state *state;
200         int i;
201
202         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
203                 return -EIO;
204
205         v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
206
207         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
208         if (state == NULL) {
209                 return -ENOMEM;
210         }
211         i2c_set_clientdata(client, state);
212         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
213         state->gr_mode = UPD64031A_GR_ON << 6;
214         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
215         state->ext_comp_sync = state->ext_vert_sync = 0;
216         for (i = 0; i < TOT_REGS; i++) {
217                 upd64031a_write(client, i, state->regs[i]);
218         }
219         return 0;
220 }
221
222 static int upd64031a_remove(struct i2c_client *client)
223 {
224         kfree(i2c_get_clientdata(client));
225         return 0;
226 }
227
228 /* ----------------------------------------------------------------------- */
229
230
231 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
232         .name = "upd64031a",
233         .driverid = I2C_DRIVERID_UPD64031A,
234         .command = upd64031a_command,
235         .probe = upd64031a_probe,
236         .remove = upd64031a_remove,
237 };