V4L/DVB (5304): Improve chip matching in v4l2_register
[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/upd64031a.h>
31
32 // --------------------- read registers functions define -----------------------
33
34 /* bit masks */
35 #define GR_MODE_MASK              0xc0
36 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
37 #define SYNC_CIRCUIT_MASK         0xa0
38
39 // -----------------------------------------------------------------------------
40
41 MODULE_DESCRIPTION("uPD64031A driver");
42 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
43 MODULE_LICENSE("GPL");
44
45 static int debug = 0;
46 module_param(debug, int, 0644);
47
48 MODULE_PARM_DESC(debug, "Debug level (0-1)");
49
50 static unsigned short normal_i2c[] = { 0x24 >> 1, 0x26 >> 1, I2C_CLIENT_END };
51
52
53 I2C_CLIENT_INSMOD;
54
55 enum {
56         R00 = 0, R01, R02, R03, R04,
57         R05, R06, R07, R08, R09,
58         R0A, R0B, R0C, R0D, R0E, R0F,
59         /* unused registers
60          R10, R11, R12, R13, R14,
61          R15, R16, R17,
62          */
63         TOT_REGS
64 };
65
66 struct upd64031a_state {
67         u8 regs[TOT_REGS];
68         u8 gr_mode;
69         u8 direct_3dycs_connect;
70         u8 ext_comp_sync;
71         u8 ext_vert_sync;
72 };
73
74 static u8 upd64031a_init[] = {
75         0x00, 0xb8, 0x48, 0xd2, 0xe6,
76         0x03, 0x10, 0x0b, 0xaf, 0x7f,
77         0x00, 0x00, 0x1d, 0x5e, 0x00,
78         0xd0
79 };
80
81 /* ------------------------------------------------------------------------ */
82
83 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
84 {
85         u8 buf[2];
86
87         if (reg >= sizeof(buf))
88                 return 0xff;
89         i2c_master_recv(client, buf, 2);
90         return buf[reg];
91 }
92
93 /* ------------------------------------------------------------------------ */
94
95 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
96 {
97         u8 buf[2];
98
99         buf[0] = reg;
100         buf[1] = val;
101         v4l_dbg(1, debug, client, "writing reg addr: %02X val: %02X\n", reg, val);
102         if (i2c_master_send(client, buf, 2) != 2)
103                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
104 }
105
106 /* ------------------------------------------------------------------------ */
107
108 /* The input changed due to new input or channel changed */
109 static void upd64031a_change(struct i2c_client *client)
110 {
111         struct upd64031a_state *state = i2c_get_clientdata(client);
112         u8 reg = state->regs[R00];
113
114         v4l_dbg(1, debug, client, "changed input or channel\n");
115         upd64031a_write(client, R00, reg | 0x10);
116         upd64031a_write(client, R00, reg & ~0x10);
117 }
118
119 /* ------------------------------------------------------------------------ */
120
121 static int upd64031a_command(struct i2c_client *client, unsigned int cmd, void *arg)
122 {
123         struct upd64031a_state *state = i2c_get_clientdata(client);
124         struct v4l2_routing *route = arg;
125
126         switch (cmd) {
127         case VIDIOC_S_FREQUENCY:
128                 upd64031a_change(client);
129                 break;
130
131         case VIDIOC_INT_G_VIDEO_ROUTING:
132                 route->input = (state->gr_mode >> 6) |
133                         (state->direct_3dycs_connect >> 4) |
134                         (state->ext_comp_sync >> 1) |
135                         (state->ext_vert_sync >> 2);
136                 route->output = 0;
137                 break;
138
139         case VIDIOC_INT_S_VIDEO_ROUTING:
140         {
141                 u8 r00, r05, r08;
142
143                 state->gr_mode = (route->input & 3) << 6;
144                 state->direct_3dycs_connect = (route->input & 0xc) << 4;
145                 state->ext_comp_sync = (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
146                 state->ext_vert_sync = (route->input & UPD64031A_VERTICAL_EXTERNAL) << 2;
147                 r00 = (state->regs[R00] & ~GR_MODE_MASK) | state->gr_mode;
148                 r05 = (state->regs[R00] & ~SYNC_CIRCUIT_MASK) |
149                         state->ext_comp_sync | state->ext_vert_sync;
150                 r08 = (state->regs[R08] & ~DIRECT_3DYCS_CONNECT_MASK) |
151                         state->direct_3dycs_connect;
152                 upd64031a_write(client, R00, r00);
153                 upd64031a_write(client, R05, r05);
154                 upd64031a_write(client, R08, r08);
155                 upd64031a_change(client);
156                 break;
157         }
158
159         case VIDIOC_LOG_STATUS:
160                 v4l_info(client, "Status: SA00=0x%02x SA01=0x%02x\n",
161                         upd64031a_read(client, 0), upd64031a_read(client, 1));
162                 break;
163
164 #ifdef CONFIG_VIDEO_ADV_DEBUG
165         case VIDIOC_DBG_G_REGISTER:
166         case VIDIOC_DBG_S_REGISTER:
167         {
168                 struct v4l2_register *reg = arg;
169
170                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
171                         return -EINVAL;
172                 if (!capable(CAP_SYS_ADMIN))
173                         return -EPERM;
174                 if (cmd == VIDIOC_DBG_G_REGISTER)
175                         reg->val = upd64031a_read(client, reg->reg & 0xff);
176                 else
177                         upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
178                 break;
179         }
180 #endif
181
182         default:
183                 break;
184         }
185         return 0;
186 }
187
188 /* ------------------------------------------------------------------------ */
189
190 /* i2c implementation */
191
192 static struct i2c_driver i2c_driver;
193
194 static int upd64031a_attach(struct i2c_adapter *adapter, int address, int kind)
195 {
196         struct i2c_client *client;
197         struct upd64031a_state *state;
198         int i;
199
200         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
201                 return 0;
202
203         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
204         if (client == NULL) {
205                 return -ENOMEM;
206         }
207
208         client->addr = address;
209         client->adapter = adapter;
210         client->driver = &i2c_driver;
211         snprintf(client->name, sizeof(client->name) - 1, "uPD64031A");
212
213         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
214
215         state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
216         if (state == NULL) {
217                 kfree(client);
218                 return -ENOMEM;
219         }
220         i2c_set_clientdata(client, state);
221         memcpy(state->regs, upd64031a_init, sizeof(state->regs));
222         state->gr_mode = UPD64031A_GR_ON << 6;
223         state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
224         state->ext_comp_sync = state->ext_vert_sync = 0;
225         for (i = 0; i < TOT_REGS; i++) {
226                 upd64031a_write(client, i, state->regs[i]);
227         }
228
229         i2c_attach_client(client);
230
231         return 0;
232 }
233
234 static int upd64031a_probe(struct i2c_adapter *adapter)
235 {
236         if (adapter->class & I2C_CLASS_TV_ANALOG)
237                 return i2c_probe(adapter, &addr_data, upd64031a_attach);
238         return 0;
239 }
240
241 static int upd64031a_detach(struct i2c_client *client)
242 {
243         int err;
244
245         err = i2c_detach_client(client);
246         if (err)
247                 return err;
248
249         kfree(client);
250         return 0;
251 }
252
253 /* ----------------------------------------------------------------------- */
254
255 /* i2c implementation */
256 static struct i2c_driver i2c_driver = {
257         .driver = {
258                 .name = "upd64031a",
259         },
260         .id = I2C_DRIVERID_UPD64031A,
261         .attach_adapter = upd64031a_probe,
262         .detach_client  = upd64031a_detach,
263         .command = upd64031a_command,
264 };
265
266
267 static int __init upd64031a_init_module(void)
268 {
269         return i2c_add_driver(&i2c_driver);
270 }
271
272 static void __exit upd64031a_exit_module(void)
273 {
274         i2c_del_driver(&i2c_driver);
275 }
276
277 module_init(upd64031a_init_module);
278 module_exit(upd64031a_exit_module);