2 * upd6408x - NEC Electronics 3-Dimensional Y/C separation driver
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>
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.
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.
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
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/i2c.h>
27 #include <linux/videodev2.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-chip-ident.h>
30 #include <media/v4l2-i2c-drv.h>
31 #include <media/upd64083.h>
33 MODULE_DESCRIPTION("uPD64083 driver");
34 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
35 MODULE_LICENSE("GPL");
38 module_param(debug, bool, 0644);
40 MODULE_PARM_DESC(debug, "Debug level (0-1)");
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,
52 struct upd64083_state {
53 struct v4l2_subdev sd;
59 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
61 return container_of(sd, struct upd64083_state, sd);
64 /* Initial values when used in combination with the
65 NEC upd64031a ghost reduction chip. */
66 static u8 upd64083_init[] = {
67 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
68 0x36, 0xdd, 0x05, 0x56, 0x48,
69 0x00, 0x3a, 0xa0, 0x05, 0x08,
70 0x44, 0x60, 0x08, 0x52, 0xf8,
74 /* ------------------------------------------------------------------------ */
76 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
78 struct i2c_client *client = v4l2_get_subdevdata(sd);
83 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
84 if (i2c_master_send(client, buf, 2) != 2)
85 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
88 /* ------------------------------------------------------------------------ */
90 #ifdef CONFIG_VIDEO_ADV_DEBUG
91 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
93 struct i2c_client *client = v4l2_get_subdevdata(sd);
96 if (reg >= sizeof(buf))
98 i2c_master_recv(client, buf, sizeof(buf));
103 /* ------------------------------------------------------------------------ */
105 static int upd64083_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
107 struct upd64083_state *state = to_state(sd);
110 if (route->input > 7 || (route->input & 6) == 6)
112 state->mode = (route->input & 3) << 6;
113 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
114 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
115 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
116 upd64083_write(sd, R00, r00);
117 upd64083_write(sd, R02, r02);
121 #ifdef CONFIG_VIDEO_ADV_DEBUG
122 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
124 struct i2c_client *client = v4l2_get_subdevdata(sd);
126 if (!v4l2_chip_match_i2c_client(client, ®->match))
128 if (!capable(CAP_SYS_ADMIN))
130 reg->val = upd64083_read(sd, reg->reg & 0xff);
135 static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
137 struct i2c_client *client = v4l2_get_subdevdata(sd);
139 if (!v4l2_chip_match_i2c_client(client, ®->match))
141 if (!capable(CAP_SYS_ADMIN))
143 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
148 static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
150 struct i2c_client *client = v4l2_get_subdevdata(sd);
152 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
155 static int upd64083_log_status(struct v4l2_subdev *sd)
157 struct i2c_client *client = v4l2_get_subdevdata(sd);
160 i2c_master_recv(client, buf, 7);
161 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
162 "SA04=%02x SA05=%02x SA06=%02x\n",
163 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
167 static int upd64083_command(struct i2c_client *client, unsigned cmd, void *arg)
169 return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
172 /* ----------------------------------------------------------------------- */
174 static const struct v4l2_subdev_core_ops upd64083_core_ops = {
175 .log_status = upd64083_log_status,
176 .g_chip_ident = upd64083_g_chip_ident,
177 #ifdef CONFIG_VIDEO_ADV_DEBUG
178 .g_register = upd64083_g_register,
179 .s_register = upd64083_s_register,
183 static const struct v4l2_subdev_video_ops upd64083_video_ops = {
184 .s_routing = upd64083_s_routing,
187 static const struct v4l2_subdev_ops upd64083_ops = {
188 .core = &upd64083_core_ops,
189 .video = &upd64083_video_ops,
192 /* ------------------------------------------------------------------------ */
194 /* i2c implementation */
196 static int upd64083_probe(struct i2c_client *client,
197 const struct i2c_device_id *id)
199 struct upd64083_state *state;
200 struct v4l2_subdev *sd;
203 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
206 v4l_info(client, "chip found @ 0x%x (%s)\n",
207 client->addr << 1, client->adapter->name);
209 state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
213 v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
214 /* Initially assume that a ghost reduction chip is present */
215 state->mode = 0; /* YCS mode */
216 state->ext_y_adc = (1 << 5);
217 memcpy(state->regs, upd64083_init, TOT_REGS);
218 for (i = 0; i < TOT_REGS; i++)
219 upd64083_write(sd, i, state->regs[i]);
223 static int upd64083_remove(struct i2c_client *client)
225 struct v4l2_subdev *sd = i2c_get_clientdata(client);
227 v4l2_device_unregister_subdev(sd);
232 /* ----------------------------------------------------------------------- */
234 static const struct i2c_device_id upd64083_id[] = {
238 MODULE_DEVICE_TABLE(i2c, upd64083_id);
240 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
242 .driverid = I2C_DRIVERID_UPD64083,
243 .command = upd64083_command,
244 .probe = upd64083_probe,
245 .remove = upd64083_remove,
246 .id_table = upd64083_id,