V4L/DVB (6862): ivtv: really remove i2c legacy support from drivers that no longer...
[linux-2.6.git] / 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/v4l2-chip-ident.h>
30 #include <media/v4l2-i2c-drv.h>
31 #include <media/upd64083.h>
32
33 MODULE_DESCRIPTION("uPD64083 driver");
34 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
35 MODULE_LICENSE("GPL");
36
37 static int debug = 0;
38 module_param(debug, bool, 0644);
39
40 MODULE_PARM_DESC(debug, "Debug level (0-1)");
41
42
43 enum {
44         R00 = 0, R01, R02, R03, R04,
45         R05, R06, R07, R08, R09,
46         R0A, R0B, R0C, R0D, R0E, R0F,
47         R10, R11, R12, R13, R14,
48         R15, R16,
49         TOT_REGS
50 };
51
52 struct upd64083_state {
53         u8 mode;
54         u8 ext_y_adc;
55         u8 regs[TOT_REGS];
56 };
57
58 /* Initial values when used in combination with the
59    NEC upd64031a ghost reduction chip. */
60 static u8 upd64083_init[] = {
61         0x1f, 0x01, 0xa0, 0x2d, 0x29,  /* we use EXCSS=0 */
62         0x36, 0xdd, 0x05, 0x56, 0x48,
63         0x00, 0x3a, 0xa0, 0x05, 0x08,
64         0x44, 0x60, 0x08, 0x52, 0xf8,
65         0x53, 0x60, 0x10
66 };
67
68 /* ------------------------------------------------------------------------ */
69
70 static void upd64083_log_status(struct i2c_client *client)
71 {
72         u8 buf[7];
73
74         i2c_master_recv(client, buf, 7);
75         v4l_info(client, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
76                       "SA04=%02x SA05=%02x SA06=%02x\n",
77                 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
78 }
79
80 /* ------------------------------------------------------------------------ */
81
82 static void upd64083_write(struct i2c_client *client, u8 reg, u8 val)
83 {
84         u8 buf[2];
85
86         buf[0] = reg;
87         buf[1] = val;
88         v4l_dbg(1, debug, client, "writing reg addr: %02x val: %02x\n", reg, val);
89         if (i2c_master_send(client, buf, 2) != 2)
90                 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
91 }
92
93 /* ------------------------------------------------------------------------ */
94
95 #ifdef CONFIG_VIDEO_ADV_DEBUG
96 static u8 upd64083_read(struct i2c_client *client, u8 reg)
97 {
98         u8 buf[7];
99
100         if (reg >= sizeof(buf))
101                 return 0xff;
102         i2c_master_recv(client, buf, sizeof(buf));
103         return buf[reg];
104 }
105 #endif
106
107 /* ------------------------------------------------------------------------ */
108
109 static int upd64083_command(struct i2c_client *client, unsigned int cmd, void *arg)
110 {
111         struct upd64083_state *state = i2c_get_clientdata(client);
112         struct v4l2_routing *route = arg;
113
114         switch (cmd) {
115         case VIDIOC_INT_G_VIDEO_ROUTING:
116                 route->input = (state->mode >> 6) | (state->ext_y_adc >> 3);
117                 route->output = 0;
118                 break;
119
120         case VIDIOC_INT_S_VIDEO_ROUTING:
121         {
122                 u8 r00, r02;
123
124                 if (route->input > 7 || (route->input & 6) == 6)
125                         return -EINVAL;
126                 state->mode = (route->input & 3) << 6;
127                 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
128                 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
129                 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
130                 upd64083_write(client, R00, r00);
131                 upd64083_write(client, R02, r02);
132                 break;
133         }
134
135         case VIDIOC_LOG_STATUS:
136                 upd64083_log_status(client);
137                 break;
138
139 #ifdef CONFIG_VIDEO_ADV_DEBUG
140         case VIDIOC_DBG_G_REGISTER:
141         case VIDIOC_DBG_S_REGISTER:
142         {
143                 struct v4l2_register *reg = arg;
144
145                 if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip))
146                         return -EINVAL;
147                 if (!capable(CAP_SYS_ADMIN))
148                         return -EPERM;
149                 if (cmd == VIDIOC_DBG_G_REGISTER)
150                         reg->val = upd64083_read(client, reg->reg & 0xff);
151                 else
152                         upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
153                 break;
154         }
155 #endif
156
157         case VIDIOC_G_CHIP_IDENT:
158                 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_UPD64083, 0);
159
160         default:
161                 break;
162         }
163
164         return 0;
165 }
166
167 /* ------------------------------------------------------------------------ */
168
169 /* i2c implementation */
170
171 static int upd64083_probe(struct i2c_client *client)
172 {
173         struct upd64083_state *state;
174         int i;
175
176         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
177                 return -EIO;
178
179         v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
180
181         state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
182         if (state == NULL) {
183                 return -ENOMEM;
184         }
185         i2c_set_clientdata(client, state);
186         /* Initially assume that a ghost reduction chip is present */
187         state->mode = 0;  /* YCS mode */
188         state->ext_y_adc = (1 << 5);
189         memcpy(state->regs, upd64083_init, TOT_REGS);
190         for (i = 0; i < TOT_REGS; i++) {
191                 upd64083_write(client, i, state->regs[i]);
192         }
193         return 0;
194 }
195
196 static int upd64083_remove(struct i2c_client *client)
197 {
198         kfree(i2c_get_clientdata(client));
199         return 0;
200 }
201
202 /* ----------------------------------------------------------------------- */
203
204
205 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
206         .name = "upd64083",
207         .driverid = I2C_DRIVERID_UPD64083,
208         .command = upd64083_command,
209         .probe = upd64083_probe,
210         .remove = upd64083_remove,
211 };