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add953ce HV |
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); |