V4L/DVB (5355): Add VIDIOC_G_CHIP_IDENT to various i2c modules
[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/upd64031a.h>
32
33 // --------------------- read registers functions define -----------------------
34
35 /* bit masks */
36 #define GR_MODE_MASK              0xc0
37 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
38 #define SYNC_CIRCUIT_MASK         0xa0
39
40 // -----------------------------------------------------------------------------
41
42 MODULE_DESCRIPTION("uPD64031A driver");
43 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
44 MODULE_LICENSE("GPL");
45
46 static int debug = 0;
47 module_param(debug, int, 0644);
48
49 MODULE_PARM_DESC(debug, "Debug level (0-1)");
50
51 static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
52
53
54 I2C_CLIENT_INSMOD;
55
56 enum {
57         R00 = 0, R01, R02, R03, R04,
58         R05, R06, R07, R08, R09,
59         R0A, R0B, R0C, R0D, R0E, R0F,
60         /* unused registers
61          R10, R11, R12, R13, R14,
62          R15, R16, R17,
63          */
64         TOT_REGS
65 };
66
67 struct upd64031a_state {
68         u8 regs[TOT_REGS];
69         u8 gr_mode;
70         u8 direct_3dycs_connect;
71         u8 ext_comp_sync;
72         u8 ext_vert_sync;
73 };
74
75 static u8 upd64031a_init[] = {
76         0x00, 0xb8, 0x48, 0xd2, 0xe6,
77         0x03, 0x10, 0x0b, 0xaf, 0x7f,
78         0x00, 0x00, 0x1d, 0x5e, 0x00,
79         0xd0
80 };
81
82 /* ------------------------------------------------------------------------ */
83
84 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
85 {
86         u8 buf[2];
87
88         if (reg >= sizeof(buf))
89                 return 0xff;
90         i2c_master_recv(client, buf, 2);
91         return buf[reg];
92 }
93
94 /* ------------------------------------------------------------------------ */
95
96 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
97 {
98         u8 buf[2];
99
100         buf[0] = reg;
101         buf[1] = val;
102         v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
103         if (i2c_master_send(client, buf, 2) != 2)
104                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
105 }
106
107 /* ------------------------------------------------------------------------ */
108
109 /* The input changed due to new input or channel changed */
110 static void upd64031a_change(struct i2c_client *client)
111 {
112         struct upd64031a_state *state = i2c_get_clientdata(client);
113         u8 reg = state->regs[R00];
114
115         v4l_dbg(1, debug, client, "changed input or channel\n");
116         upd64031a_write(client, R00, reg | 0x10);
117         upd64031a_write(client, R00, reg & ~0x10);
118 }
119
120 /* ------------------------------------------------------------------------ */
121
122 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
123 {
124         struct upd64031a_state *state = i2c_get_clientdata(client);
125         struct v4l2_routing *route = arg;
126
127         switch (cmd) {
128         case VIDIOC_S_FREQUENCY:
129                 upd64031a_change(client);
130                 break;
131
132         case VIDIOC_INT_G_VIDEO_ROUTING:
133                 route->input = (state->gr_mode >> 6) |
134                         (state->direct_3dycs_connect >> 4) |
135                         (state->ext_comp_sync >> 1) |
136                         (state->ext_vert_sync >> 2);
137                 route->output = 0;
138                 break;
139
140         case VIDIOC_INT_S_VIDEO_ROUTING:
141         {
142                 u8 r00, r05, r08;
143
144                 state->gr_mode = (route->input & 3) << 6;
145                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
146                 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
147                 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
148                 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
149                 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
150                         state->ext_comp_sync | state->ext_vert_sync;
151                 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
152                         state->direct_3dycs_connect;
153                 upd64031a_write(client, R00, r00);
154                 upd64031a_write(client, R05, r05);
155                 upd64031a_write(client, R08, r08);
156                 upd64031a_change(client);
157                 break;
158         }
159
160         case VIDIOC_LOG_STATUS:
161                 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
162                         upd64031a_read(client, 0), upd64031a_read(client, 1));
163                 break;
164
165 #ifdef CONFIG_VIDEO_ADV_DEBUG
166         case VIDIOC_DBG_G_REGISTER:
167         case VIDIOC_DBG_S_REGISTER:
168         {
169                 struct v4l2_register *reg = arg;
170
171                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
172                         return -EINVAL;
173                 if (!capable(CAP_SYS_ADMIN))
174                         return -EPERM;
175                 if (cmd == VIDIOC_DBG_G_REGISTER)
176                         reg->val = upd64031a_read(client, reg->reg & 0xff);
177                 else
178                         upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
179                 break;
180         }
181 #endif
182
183         case VIDIOC_G_CHIP_IDENT:
184                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64031A, 0);
185
186         default:
187                 break;
188         }
189         return 0;
190 }
191
192 /* ------------------------------------------------------------------------ */
193
194 /* i2c implementation */
195
196 static struct i2c_driver i2c_driver;
197
198 static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
199 {
200         struct i2c_client *client;
201         struct upd64031a_state *state;
202         int i;
203
204         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
205                 return 0;
206
207         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
208         if (client == NULL) {
209                 return -ENOMEM;
210         }
211
212         client->addr = address;
213         client->adapter = adapter;
214         client->driver = &i2c_driver;
215         snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
216
217         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
218
219         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
220         if (state == NULL) {
221                 kfree(client);
222                 return -ENOMEM;
223         }
224         i2c_set_clientdata(client, state);
225         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
226         state->gr_mode = UPD64031A_GR_ON << 6;
227         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
228         state->ext_comp_sync = state->ext_vert_sync = 0;
229         for (i = 0; i < TOT_REGS; i++) {
230                 upd64031a_write(client, i, state->regs[i]);
231         }
232
233         i2c_attach_client(client);
234
235         return 0;
236 }
237
238 static int upd64031a_probe(struct i2c_adapter *adapter)
239 {
240         if (adapter->class & I2C_CLASS_TV_ANALOG)
241                 return i2c_probe(adapter, &addr_data, upd64031a_attach);
242         return 0;
243 }
244
245 static int upd64031a_detach(struct i2c_client *client)
246 {
247         int err;
248
249         err = i2c_detach_client(client);
250         if (err)
251                 return err;
252
253         kfree(client);
254         return 0;
255 }
256
257 /* ----------------------------------------------------------------------- */
258
259 /* i2c implementation */
260 static struct i2c_driver i2c_driver = {
261         .driver = {
262                 .name = "upd64031a",
263         },
264         .id = I2C_DRIVERID_UPD64031A,
265         .attach_adapter = upd64031a_probe,
266         .detach_client  = upd64031a_detach,
267         .command = upd64031a_command,
268 };
269
270
271 static int __init upd64031a_init_module(void)
272 {
273         return i2c_add_driver(&i2c_driver);
274 }
275
276 static void __exit upd64031a_exit_module(void)
277 {
278         i2c_del_driver(&i2c_driver);
279 }
280
281 module_init(upd64031a_init_module);
282 module_exit(upd64031a_exit_module);