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/v4l2-i2c-drv.h>
32 #include <media/upd64031a.h>
33
34 /* --------------------- read registers functions define -------------------- */
35
36 /* bit masks */
37 #define GR_MODE_MASK 0xc0
38 #define DIRECT_3DYCS_CONNECT_MASK 0xc0
39 #define SYNC_CIRCUIT_MASK 0xa0
40
41 /* -------------------------------------------------------------------------- */
42
43 MODULE_DESCRIPTION("uPD64031A driver");
44 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
45 MODULE_LICENSE("GPL");
46
47 static int debug;
48 module_param(debug, int, 0644);
49
50 MODULE_PARM_DESC(debug, "Debug level (0-1)");
51
52
53 enum {
54 R00 = 0, R01, R02, R03, R04,
55 R05, R06, R07, R08, R09,
56 R0A, R0B, R0C, R0D, R0E, R0F,
57 /* unused registers
58 R10, R11, R12, R13, R14,
59 R15, R16, R17,
60 */
61 TOT_REGS
62 };
63
64 struct upd64031a_state {
65 u8 regs[TOT_REGS];
66 u8 gr_mode;
67 u8 direct_3dycs_connect;
68 u8 ext_comp_sync;
69 u8 ext_vert_sync;
70 };
71
72 static u8 upd64031a_init[] = {
73 0x00, 0xb8, 0x48, 0xd2, 0xe6,
74 0x03, 0x10, 0x0b, 0xaf, 0x7f,
75 0x00, 0x00, 0x1d, 0x5e, 0x00,
76 0xd0
77 };
78
79 /* ------------------------------------------------------------------------ */
80
81 static u8 upd64031a_read(struct i2c_client *client, u8 reg)
82 {
83 u8 buf[2];
84
85 if (reg >= sizeof(buf))
86 return 0xff;
87 i2c_master_recv(client, buf, 2);
88 return buf[reg];
89 }
90
91 /* ------------------------------------------------------------------------ */
92
93 static void upd64031a_write(struct i2c_client *client, u8 reg, u8 val)
94 {
95 u8 buf[2];
96
97 buf[0] = reg;
98 buf[1] = val;
99 v4l_dbg(1, debug, client, "write reg: %02X val: %02X\n", reg, val);
100 if (i2c_master_send(client, buf, 2) != 2)
101 v4l_err(client, "I/O error write 0x%02x/0x%02x\n", reg, val);
102 }
103
104 /* ------------------------------------------------------------------------ */
105
106 /* The input changed due to new input or channel changed */
107 static void upd64031a_change(struct i2c_client *client)
108 {
109 struct upd64031a_state *state = i2c_get_clientdata(client);
110 u8 reg = state->regs[R00];
111
112 v4l_dbg(1, debug, client, "changed input or channel\n");
113 upd64031a_write(client, R00, reg | 0x10);
114 upd64031a_write(client, R00, reg & ~0x10);
115 }
116
117 /* ------------------------------------------------------------------------ */
118
119 static int upd64031a_command(struct i2c_client *client, unsigned cmd, void *arg)
120 {
121 struct upd64031a_state *state = i2c_get_clientdata(client);
122 struct v4l2_routing *route = arg;
123
124 switch (cmd) {
125 case VIDIOC_S_FREQUENCY:
126 upd64031a_change(client);
127 break;
128
129 case VIDIOC_INT_G_VIDEO_ROUTING:
130 route->input = (state->gr_mode >> 6) |
131 (state->direct_3dycs_connect >> 4) |
132 (state->ext_comp_sync >> 1) |
133 (state->ext_vert_sync >> 2);
134 route->output = 0;
135 break;
136
137 case VIDIOC_INT_S_VIDEO_ROUTING:
138 {
139 u8 r00, r05, r08;
140
141 state->gr_mode = (route->input & 3) << 6;
142 state->direct_3dycs_connect = (route->input & 0xc) << 4;
143 state->ext_comp_sync =
144 (route->input & UPD64031A_COMPOSITE_EXTERNAL) << 1;
145 state->ext_vert_sync =
146 (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,
171 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 break;
178 }
179 upd64031a_write(client, reg->reg & 0xff, reg->val & 0xff);
180 break;
181 }
182 #endif
183
184 case VIDIOC_G_CHIP_IDENT:
185 return v4l2_chip_ident_i2c_client(client, arg,
186 V4L2_IDENT_UPD64031A, 0);
187
188 default:
189 break;
190 }
191 return 0;
192 }
193
194 /* ------------------------------------------------------------------------ */
195
196 /* i2c implementation */
197
198 static int upd64031a_probe(struct i2c_client *client)
199 {
200 struct upd64031a_state *state;
201 int i;
202
203 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
204 return -EIO;
205
206 v4l_info(client, "chip found @ 0x%x (%s)\n",
207 client->addr << 1, client->adapter->name);
208
209 state = kmalloc(sizeof(struct upd64031a_state), GFP_KERNEL);
210 if (state == NULL)
211 return -ENOMEM;
212 i2c_set_clientdata(client, state);
213 memcpy(state->regs, upd64031a_init, sizeof(state->regs));
214 state->gr_mode = UPD64031A_GR_ON << 6;
215 state->direct_3dycs_connect = UPD64031A_3DYCS_COMPOSITE << 4;
216 state->ext_comp_sync = state->ext_vert_sync = 0;
217 for (i = 0; i < TOT_REGS; i++)
218 upd64031a_write(client, i, state->regs[i]);
219 return 0;
220 }
221
222 static int upd64031a_remove(struct i2c_client *client)
223 {
224 kfree(i2c_get_clientdata(client));
225 return 0;
226 }
227
228 /* ----------------------------------------------------------------------- */
229
230
231 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
232 .name = "upd64031a",
233 .driverid = I2C_DRIVERID_UPD64031A,
234 .command = upd64031a_command,
235 .probe = upd64031a_probe,
236 .remove = upd64031a_remove,
237 };
238
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