V4L/DVB (4638): Basic DVB-T and analog TV support for the HVR1300.
[linux-2.6] / 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/upd64083.h>
30
31 MODULE_DESCRIPTION("uPD64083 driver");
32 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
33 MODULE_LICENSE("GPL");
34
35 static int debug = 0;
36 module_param(debug, bool, 0644);
37
38 MODULE_PARM_DESC(debug, "Debug level (0-1)");
39
40 static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };
41
42
43 I2C_CLIENT_INSMOD;
44
45 enum {
46         R00 = 0, R01, R02, R03, R04,
47         R05, R06, R07, R08, R09,
48         R0A, R0B, R0C, R0D, R0E, R0F,
49         R10, R11, R12, R13, R14,
50         R15, R16,
51         TOT_REGS
52 };
53
54 struct upd64083_state {
55         u8 mode;
56         u8 ext_y_adc;
57         u8 regs[TOT_REGS];
58 };
59
60 /* Initial values when used in combination with the
61    NEC upd64031a ghost reduction chip. */
62 static u8 upd64083_init[] = {
63         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
64         0x36, 0xdd, 0x05, 0x56, 0x48,
65         0x00, 0x3a, 0xa0, 0x05, 0x08,
66         0x44, 0x60, 0x08, 0x52, 0xf8,
67         0x53, 0x60, 0x10
68 };
69
70 /* ------------------------------------------------------------------------ */
71
72 static void upd64083_log_status(struct i2c_client *client)
73 {
74         u8 buf[7];
75
76         i2c_master_recv(client, buf, 7);
77         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
78                       "SA04=%02x SA05=%02x SA06=%02x\n",
79                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
80 }
81
82 /* ------------------------------------------------------------------------ */
83
84 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
85 {
86         u8 buf[2];
87
88         buf[0] = reg;
89         buf[1] = val;
90         v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
91         if (i2c_master_send(client, buf, 2) != 2)
92                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
93 }
94
95 /* ------------------------------------------------------------------------ */
96
97 #ifdef CONFIG_VIDEO_ADV_DEBUG
98 static u8 upd64083_read(struct i2c_client *client, u8 reg)
99 {
100         u8 buf[7];
101
102         if (reg >= sizeof(buf))
103                 return 0xff;
104         i2c_master_recv(client, buf, sizeof(buf));
105         return buf[reg];
106 }
107 #endif
108
109 /* ------------------------------------------------------------------------ */
110
111 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
112 {
113         struct upd64083_state *state = i2c_get_clientdata(client);
114         struct v4l2_routing *route = arg;
115
116         switch (cmd) {
117         case VIDIOC_INT_G_VIDEO_ROUTING:
118                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
119                 route->output = 0;
120                 break;
121
122         case VIDIOC_INT_S_VIDEO_ROUTING:
123         {
124                 u8 r00, r02;
125
126                 if (route->input > 7 || (route->input & 6) == 6)
127                         return -EINVAL;
128                 state->mode = (route->input & 3) << 6;
129                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
130                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
131                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
132                 upd64083_write(client, R00, r00);
133                 upd64083_write(client, R02, r02);
134                 break;
135         }
136
137         case VIDIOC_LOG_STATUS:
138                 upd64083_log_status(client);
139                 break;
140
141 #ifdef CONFIG_VIDEO_ADV_DEBUG
142         case VIDIOC_INT_G_REGISTER:
143         {
144                 struct v4l2_register *reg = arg;
145
146                 if (reg->i2c_id != I2C_DRIVERID_UPD64083)
147                         return -EINVAL;
148                 reg->val = upd64083_read(client, reg->reg & 0xff);
149                 break;
150         }
151
152         case VIDIOC_INT_S_REGISTER:
153         {
154                 struct v4l2_register *reg = arg;
155                 u8 addr = reg->reg & 0xff;
156                 u8 val = reg->val & 0xff;
157
158                 if (reg->i2c_id != I2C_DRIVERID_UPD64083)
159                         return -EINVAL;
160                 if (!capable(CAP_SYS_ADMIN))
161                         return -EPERM;
162                 upd64083_write(client, addr, val);
163                 break;
164         }
165 #endif
166         default:
167                 break;
168         }
169
170         return 0;
171 }
172
173 /* ------------------------------------------------------------------------ */
174
175 /* i2c implementation */
176
177 static struct i2c_driver i2c_driver;
178
179 static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
180 {
181         struct i2c_client *client;
182         struct upd64083_state *state;
183         int i;
184
185         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
186                 return 0;
187
188         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
189         if (client == NULL) {
190                 return -ENOMEM;
191         }
192
193         client->addr = address;
194         client->adapter = adapter;
195         client->driver = &i2c_driver;
196         snprintf(client->name, sizeof(client->name) - 1, "uPD64083");
197
198         v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
199
200         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
201         if (state == NULL) {
202                 kfree(client);
203                 return -ENOMEM;
204         }
205         i2c_set_clientdata(client, state);
206         /* Initially assume that a ghost reduction chip is present */
207         state->mode = 0;  /* YCS mode */
208         state->ext_y_adc = (1 << 5);
209         memcpy(state->regs, upd64083_init, TOT_REGS);
210         for (i = 0; i < TOT_REGS; i++) {
211                 upd64083_write(client, i, state->regs[i]);
212         }
213         i2c_attach_client(client);
214
215         return 0;
216 }
217
218 static int upd64083_probe(struct i2c_adapter *adapter)
219 {
220         if (adapter->class & I2C_CLASS_TV_ANALOG)
221                 return i2c_probe(adapter, &addr_data, upd64083_attach);
222         return 0;
223 }
224
225 static int upd64083_detach(struct i2c_client *client)
226 {
227         int err;
228
229         err = i2c_detach_client(client);
230         if (err)
231                 return err;
232
233         kfree(client);
234         return 0;
235 }
236
237 /* ----------------------------------------------------------------------- */
238
239 /* i2c implementation */
240 static struct i2c_driver i2c_driver = {
241         .driver = {
242                 .name = "upd64083",
243         },
244         .id = I2C_DRIVERID_UPD64083,
245         .attach_adapter = upd64083_probe,
246         .detach_client  = upd64083_detach,
247         .command = upd64083_command,
248 };
249
250
251 static int __init upd64083_init_module(void)
252 {
253         return i2c_add_driver(&i2c_driver);
254 }
255
256 static void __exit upd64083_exit_module(void)
257 {
258         i2c_del_driver(&i2c_driver);
259 }
260
261 module_init(upd64083_init_module);
262 module_exit(upd64083_exit_module);