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/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-device.h>
30 #include <media/v4l2-chip-ident.h>
31 #include <media/v4l2-i2c-drv.h>
32 #include <media/upd64083.h>
34 MODULE_DESCRIPTION("uPD64083 driver");
35 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
36 MODULE_LICENSE("GPL");
39 module_param(debug, bool, 0644);
41 MODULE_PARM_DESC(debug, "Debug level (0-1)");
45 R00 = 0, R01, R02, R03, R04,
46 R05, R06, R07, R08, R09,
47 R0A, R0B, R0C, R0D, R0E, R0F,
48 R10, R11, R12, R13, R14,
53 struct upd64083_state {
54 struct v4l2_subdev sd;
60 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
62 return container_of(sd, struct upd64083_state, sd);
65 /* Initial values when used in combination with the
66 NEC upd64031a ghost reduction chip. */
67 static u8 upd64083_init[] = {
68 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
69 0x36, 0xdd, 0x05, 0x56, 0x48,
70 0x00, 0x3a, 0xa0, 0x05, 0x08,
71 0x44, 0x60, 0x08, 0x52, 0xf8,
75 /* ------------------------------------------------------------------------ */
77 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
79 struct i2c_client *client = v4l2_get_subdevdata(sd);
84 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
85 if (i2c_master_send(client, buf, 2) != 2)
86 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
89 /* ------------------------------------------------------------------------ */
91 #ifdef CONFIG_VIDEO_ADV_DEBUG
92 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
94 struct i2c_client *client = v4l2_get_subdevdata(sd);
97 if (reg >= sizeof(buf))
99 i2c_master_recv(client, buf, sizeof(buf));
104 /* ------------------------------------------------------------------------ */
106 static int upd64083_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
108 struct upd64083_state *state = to_state(sd);
111 if (route->input > 7 || (route->input & 6) == 6)
113 state->mode = (route->input & 3) << 6;
114 state->ext_y_adc = (route->input & UPD64083_EXT_Y_ADC) << 3;
115 r00 = (state->regs[R00] & ~(3 << 6)) | state->mode;
116 r02 = (state->regs[R02] & ~(1 << 5)) | state->ext_y_adc;
117 upd64083_write(sd, R00, r00);
118 upd64083_write(sd, R02, r02);
122 #ifdef CONFIG_VIDEO_ADV_DEBUG
123 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
125 struct i2c_client *client = v4l2_get_subdevdata(sd);
127 if (!v4l2_chip_match_i2c_client(client, ®->match))
129 if (!capable(CAP_SYS_ADMIN))
131 reg->val = upd64083_read(sd, reg->reg & 0xff);
136 static int upd64083_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
138 struct i2c_client *client = v4l2_get_subdevdata(sd);
140 if (!v4l2_chip_match_i2c_client(client, ®->match))
142 if (!capable(CAP_SYS_ADMIN))
144 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
149 static int upd64083_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
151 struct i2c_client *client = v4l2_get_subdevdata(sd);
153 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_UPD64083, 0);
156 static int upd64083_log_status(struct v4l2_subdev *sd)
158 struct i2c_client *client = v4l2_get_subdevdata(sd);
161 i2c_master_recv(client, buf, 7);
162 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
163 "SA04=%02x SA05=%02x SA06=%02x\n",
164 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
168 static int upd64083_command(struct i2c_client *client, unsigned cmd, void *arg)
170 return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
173 /* ----------------------------------------------------------------------- */
175 static const struct v4l2_subdev_core_ops upd64083_core_ops = {
176 .log_status = upd64083_log_status,
177 .g_chip_ident = upd64083_g_chip_ident,
178 #ifdef CONFIG_VIDEO_ADV_DEBUG
179 .g_register = upd64083_g_register,
180 .s_register = upd64083_s_register,
184 static const struct v4l2_subdev_video_ops upd64083_video_ops = {
185 .s_routing = upd64083_s_routing,
188 static const struct v4l2_subdev_ops upd64083_ops = {
189 .core = &upd64083_core_ops,
190 .video = &upd64083_video_ops,
193 /* ------------------------------------------------------------------------ */
195 /* i2c implementation */
197 static int upd64083_probe(struct i2c_client *client,
198 const struct i2c_device_id *id)
200 struct upd64083_state *state;
201 struct v4l2_subdev *sd;
204 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
207 v4l_info(client, "chip found @ 0x%x (%s)\n",
208 client->addr << 1, client->adapter->name);
210 state = kmalloc(sizeof(struct upd64083_state), GFP_KERNEL);
214 v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
215 /* Initially assume that a ghost reduction chip is present */
216 state->mode = 0; /* YCS mode */
217 state->ext_y_adc = (1 << 5);
218 memcpy(state->regs, upd64083_init, TOT_REGS);
219 for (i = 0; i < TOT_REGS; i++)
220 upd64083_write(sd, i, state->regs[i]);
224 static int upd64083_remove(struct i2c_client *client)
226 struct v4l2_subdev *sd = i2c_get_clientdata(client);
228 v4l2_device_unregister_subdev(sd);
233 /* ----------------------------------------------------------------------- */
235 static const struct i2c_device_id upd64083_id[] = {
239 MODULE_DEVICE_TABLE(i2c, upd64083_id);
241 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
243 .driverid = I2C_DRIVERID_UPD64083,
244 .command = upd64083_command,
245 .probe = upd64083_probe,
246 .remove = upd64083_remove,
247 .id_table = upd64083_id,