Merge branch 'linus' into x86/gart
[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
21  * 02110-1301, USA.
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.h>
32 #include <media/upd64083.h>
33
34 MODULE_DESCRIPTION("uPD64083 driver");
35 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
36 MODULE_LICENSE("GPL");
37
38 static int debug;
39 module_param(debug, bool, 0644);
40
41 MODULE_PARM_DESC(debug, "Debug level (0-1)");
42
43
44 enum {
45         R00 = 0, R01, R02, R03, R04,
46         R05, R06, R07, R08, R09,
47         R0A, R0B, R0C, R0D, R0E, R0F,
48         R10, R11, R12, R13, R14,
49         R15, R16,
50         TOT_REGS
51 };
52
53 struct upd64083_state {
54         u8 mode;
55         u8 ext_y_adc;
56         u8 regs[TOT_REGS];
57 };
58
59 /* Initial values when used in combination with the
60    NEC upd64031a ghost reduction chip. */
61 static u8 upd64083_init[] = {
62         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
63         0x36, 0xdd, 0x05, 0x56, 0x48,
64         0x00, 0x3a, 0xa0, 0x05, 0x08,
65         0x44, 0x60, 0x08, 0x52, 0xf8,
66         0x53, 0x60, 0x10
67 };
68
69 /* ------------------------------------------------------------------------ */
70
71 static void upd64083_log_status(struct i2c_client *client)
72 {
73         u8 buf[7];
74
75         i2c_master_recv(client, buf, 7);
76         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
77                       "SA04=%02x SA05=%02x SA06=%02x\n",
78                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
79 }
80
81 /* ------------------------------------------------------------------------ */
82
83 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
84 {
85         u8 buf[2];
86
87         buf[0] = reg;
88         buf[1] = val;
89         v4l_dbg(1, debug, client, "write reg: %02x val: %02x\n", reg, val);
90         if (i2c_master_send(client, buf, 2) != 2)
91                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
92 }
93
94 /* ------------------------------------------------------------------------ */
95
96 #ifdef CONFIG_VIDEO_ADV_DEBUG
97 static u8 upd64083_read(struct i2c_client *client, u8 reg)
98 {
99         u8 buf[7];
100
101         if (reg >= sizeof(buf))
102                 return 0xff;
103         i2c_master_recv(client, buf, sizeof(buf));
104         return buf[reg];
105 }
106 #endif
107
108 /* ------------------------------------------------------------------------ */
109
110 static int upd64083_command(struct i2c_client *client, unsigned cmd, void *arg)
111 {
112         struct upd64083_state *state = i2c_get_clientdata(client);
113         struct v4l2_routing *route = arg;
114
115         switch (cmd) {
116         case VIDIOC_INT_G_VIDEO_ROUTING:
117                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
118                 route->output = 0;
119                 break;
120
121         case VIDIOC_INT_S_VIDEO_ROUTING:
122         {
123                 u8 r00, r02;
124
125                 if (route->input > 7 || (route->input & 6) == 6)
126                         return -EINVAL;
127                 state->mode = (route->input & 3) << 6;
128                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
129                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
130                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
131                 upd64083_write(client, R00, r00);
132                 upd64083_write(client, R02, r02);
133                 break;
134         }
135
136         case VIDIOC_LOG_STATUS:
137                 upd64083_log_status(client);
138                 break;
139
140 #ifdef CONFIG_VIDEO_ADV_DEBUG
141         case VIDIOC_DBG_G_REGISTER:
142         case VIDIOC_DBG_S_REGISTER:
143         {
144                 struct v4l2_register *reg = arg;
145
146                 if (!v4l2_chip_match_i2c_client(client,
147                                 reg->match_type, reg->match_chip))
148                         return -EINVAL;
149                 if (!capable(CAP_SYS_ADMIN))
150                         return -EPERM;
151                 if (cmd == VIDIOC_DBG_G_REGISTER) {
152                         reg->val = upd64083_read(client, reg->reg & 0xff);
153                         break;
154                 }
155                 upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
156                 break;
157         }
158 #endif
159
160         case VIDIOC_G_CHIP_IDENT:
161                 return v4l2_chip_ident_i2c_client(client, arg,
162                                 V4L2_IDENT_UPD64083, 0);
163
164         default:
165                 break;
166         }
167
168         return 0;
169 }
170
171 /* ------------------------------------------------------------------------ */
172
173 /* i2c implementation */
174
175 static int upd64083_probe(struct i2c_client *client,
176                           const struct i2c_device_id *id)
177 {
178         struct upd64083_state *state;
179         int i;
180
181         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
182                 return -EIO;
183
184         v4l_info(client, "chip found @ 0x%x (%s)\n",
185                         client->addr << 1, client->adapter->name);
186
187         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
188         if (state == NULL)
189                 return -ENOMEM;
190         i2c_set_clientdata(client, state);
191         /* Initially assume that a ghost reduction chip is present */
192         state->mode = 0;  /* YCS mode */
193         state->ext_y_adc = (1 << 5);
194         memcpy(state->regs, upd64083_init, TOT_REGS);
195         for (i = 0; i < TOT_REGS; i++)
196                 upd64083_write(client, i, state->regs[i]);
197         return 0;
198 }
199
200 static int upd64083_remove(struct i2c_client *client)
201 {
202         kfree(i2c_get_clientdata(client));
203         return 0;
204 }
205
206 /* ----------------------------------------------------------------------- */
207
208 static const struct i2c_device_id upd64083_id[] = {
209         { "upd64083", 0 },
210         { }
211 };
212 MODULE_DEVICE_TABLE(i2c, upd64083_id);
213
214 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
215         .name = "upd64083",
216         .driverid = I2C_DRIVERID_UPD64083,
217         .command = upd64083_command,
218         .probe = upd64083_probe,
219         .remove = upd64083_remove,
220         .id_table = upd64083_id,
221 };