tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
31MODULE_DESCRIPTION("uPD64083 driver");
32MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
33MODULE_LICENSE("GPL");
34
35static int debug = 0;
36module_param(debug, bool, 0644);
37
38MODULE_PARM_DESC(debug, "Debug level (0-1)");
39
40static unsigned short normal_i2c[] = { 0xb8 >> 1, 0xba >> 1, I2C_CLIENT_END };
41
42
43I2C_CLIENT_INSMOD;
44
45enum {
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
54struct 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. */
62static 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
72static 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
84static 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
98static 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
111static 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_DBG_G_REGISTER:
143 case VIDIOC_DBG_S_REGISTER:
144 {
145 struct v4l2_register *reg = arg;
146
147 if (!v4l2_chip_match_i2c_client(client, 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 else
154 upd64083_write(client, reg->reg & 0xff, reg->val & 0xff);
155 break;
156 }
157#endif
158 default:
159 break;
160 }
161
162 return 0;
163}
164
165/* ------------------------------------------------------------------------ */
166
167/* i2c implementation */
168
169static struct i2c_driver i2c_driver;
170
171static int upd64083_attach(struct i2c_adapter *adapter, int address, int kind)
172{
173 struct i2c_client *client;
174 struct upd64083_state *state;
175 int i;
176
177 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
178 return 0;
179
180 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
181 if (client == NULL) {
182 return -ENOMEM;
183 }
184
185 client->addr = address;
186 client->adapter = adapter;
187 client->driver = &i2c_driver;
188 snprintf(client->name, sizeof(client->name) - 1, "uPD64083");
189
190 v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
191
192 state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
193 if (state == NULL) {
194 kfree(client);
195 return -ENOMEM;
196 }
197 i2c_set_clientdata(client, state);
198 /* Initially assume that a ghost reduction chip is present */
199 state->mode = 0; /* YCS mode */
200 state->ext_y_adc = (1 << 5);
201 memcpy(state->regs, upd64083_init, TOT_REGS);
202 for (i = 0; i < TOT_REGS; i++) {
203 upd64083_write(client, i, state->regs[i]);
204 }
205 i2c_attach_client(client);
206
207 return 0;
208}
209
210static int upd64083_probe(struct i2c_adapter *adapter)
211{
212 if (adapter->class & I2C_CLASS_TV_ANALOG)
213 return i2c_probe(adapter, &addr_data, upd64083_attach);
214 return 0;
215}
216
217static int upd64083_detach(struct i2c_client *client)
218{
219 int err;
220
221 err = i2c_detach_client(client);
222 if (err)
223 return err;
224
225 kfree(client);
226 return 0;
227}
228
229/* ----------------------------------------------------------------------- */
230
231/* i2c implementation */
232static struct i2c_driver i2c_driver = {
233 .driver = {
234 .name = "upd64083",
235 },
236 .id = I2C_DRIVERID_UPD64083,
237 .attach_adapter = upd64083_probe,
238 .detach_client = upd64083_detach,
239 .command = upd64083_command,
240};
241
242
243static int __init upd64083_init_module(void)
244{
245 return i2c_add_driver(&i2c_driver);
246}
247
248static void __exit upd64083_exit_module(void)
249{
250 i2c_del_driver(&i2c_driver);
251}
252
253module_init(upd64083_init_module);
254module_exit(upd64083_exit_module);