1b162f2dca95fab34edc69c239e247d68d280cb9
[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
53 enum {
54         R00 = 0, R01, R02, R03, R04,
55         R05, R06, R07, R08, R09,
56         R0A, R0B, R0C, R0D, R0E, R0F,
57         /* unused registers
58          R10, R11, R12, R13, R14,
59          R15, R16, R17,
60          */
61         TOT_REGS
62 };
63
64 struct upd64031a_state {
65         u8 regs[TOT_REGS];
66         u8 gr_mode;
67         u8 direct_3dycs_connect;
68         u8 ext_comp_sync;
69         u8 ext_vert_sync;
70 };
71
72 static u8 upd64031a_init[] = {
73         0x00, 0xb8, 0x48, 0xd2, 0xe6,
74         0x03, 0x10, 0x0b, 0xaf, 0x7f,
75         0x00, 0x00, 0x1d, 0x5e, 0x00,
76         0xd0
77 };
78
79 /* ------------------------------------------------------------------------ */
80
81 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
82 {
83         u8 buf[2];
84
85         if (reg >= sizeof(buf))
86                 return 0xff;
87         i2c_master_recv(client, buf, 2);
88         return buf[reg];
89 }
90
91 /* ------------------------------------------------------------------------ */
92
93 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
94 {
95         u8 buf[2];
96
97         buf[0] = reg;
98         buf[1] = val;
99         v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
100         if (i2c_master_send(client, buf, 2) != 2)
101                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
102 }
103
104 /* ------------------------------------------------------------------------ */
105
106 /* The input changed due to new input or channel changed */
107 static void upd64031a_change(struct i2c_client *client)
108 {
109         struct upd64031a_state *state = i2c_get_clientdata(client);
110         u8 reg = state->regs[R00];
111
112         v4l_dbg(1, debug, client, "changed input or channel\n");
113         upd64031a_write(client, R00, reg | 0x10);
114         upd64031a_write(client, R00, reg & ~0x10);
115 }
116
117 /* ------------------------------------------------------------------------ */
118
119 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
120 {
121         struct upd64031a_state *state = i2c_get_clientdata(client);
122         struct v4l2_routing *route = arg;
123
124         switch (cmd) {
125         case VIDIOC_S_FREQUENCY:
126                 upd64031a_change(client);
127                 break;
128
129         case VIDIOC_INT_G_VIDEO_ROUTING:
130                 route->input = (state->gr_mode >> 6) |
131                         (state->direct_3dycs_connect >> 4) |
132                         (state->ext_comp_sync >> 1) |
133                         (state->ext_vert_sync >> 2);
134                 route->output = 0;
135                 break;
136
137         case VIDIOC_INT_S_VIDEO_ROUTING:
138         {
139                 u8 r00, r05, r08;
140
141                 state->gr_mode = (route->input & 3) << 6;
142                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
143                 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
144                 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
145                 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
146                 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
147                         state->ext_comp_sync | state->ext_vert_sync;
148                 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
149                         state->direct_3dycs_connect;
150                 upd64031a_write(client, R00, r00);
151                 upd64031a_write(client, R05, r05);
152                 upd64031a_write(client, R08, r08);
153                 upd64031a_change(client);
154                 break;
155         }
156
157         case VIDIOC_LOG_STATUS:
158                 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
159                         upd64031a_read(client, 0), upd64031a_read(client, 1));
160                 break;
161
162 #ifdef CONFIG_VIDEO_ADV_DEBUG
163         case VIDIOC_DBG_G_REGISTER:
164         case VIDIOC_DBG_S_REGISTER:
165         {
166                 struct v4l2_register *reg = arg;
167
168                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
169                         return -EINVAL;
170                 if (!capable(CAP_SYS_ADMIN))
171                         return -EPERM;
172                 if (cmd == VIDIOC_DBG_G_REGISTER)
173                         reg->val = upd64031a_read(client, reg->reg & 0xff);
174                 else
175                         upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
176                 break;
177         }
178 #endif
179
180         case VIDIOC_G_CHIP_IDENT:
181                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0);
182
183         default:
184                 break;
185         }
186         return 0;
187 }
188
189 /* ------------------------------------------------------------------------ */
190
191 /* i2c implementation */
192
193 static int upd64031a_probe(struct i2c_client *client)
194 {
195         struct upd64031a_state *state;
196         int i;
197
198         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
199                 return -EIO;
200
201         v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
202
203         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
204         if (state == NULL) {
205                 return -ENOMEM;
206         }
207         i2c_set_clientdata(client, state);
208         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
209         state->gr_mode = UPD64031A_GR_ON << 6;
210         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
211         state->ext_comp_sync = state->ext_vert_sync = 0;
212         for (i = 0; i < TOT_REGS; i++) {
213                 upd64031a_write(client, i, state->regs[i]);
214         }
215         return 0;
216 }
217
218 static int upd64031a_remove(struct i2c_client *client)
219 {
220         kfree(i2c_get_clientdata(client));
221         return 0;
222 }
223
224 /* ----------------------------------------------------------------------- */
225
226
227 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
228         .name = "upd64031a",
229         .driverid = I2C_DRIVERID_UPD64031A,
230         .command = upd64031a_command,
231         .probe = upd64031a_probe,
232         .remove = upd64031a_remove,
233 };