dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / media / i2c / upd64083.c
blobf2057a4340608b8861d1d211d578cdcdd19fa23b
1 /*
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
21 * 02110-1301, USA.
24 #include <linux/module.h>
25 #include <linux/kernel.h>
26 #include <linux/i2c.h>
27 #include <linux/videodev2.h>
28 #include <linux/slab.h>
29 #include <media/v4l2-device.h>
30 #include <media/upd64083.h>
32 MODULE_DESCRIPTION("uPD64083 driver");
33 MODULE_AUTHOR("T. Adachi, Takeru KOMORIYA, Hans Verkuil");
34 MODULE_LICENSE("GPL");
36 static bool debug;
37 module_param(debug, bool, 0644);
39 MODULE_PARM_DESC(debug, "Debug level (0-1)");
42 enum {
43 R00 = 0, R01, R02, R03, R04,
44 R05, R06, R07, R08, R09,
45 R0A, R0B, R0C, R0D, R0E, R0F,
46 R10, R11, R12, R13, R14,
47 R15, R16,
48 TOT_REGS
51 struct upd64083_state {
52 struct v4l2_subdev sd;
53 u8 mode;
54 u8 ext_y_adc;
55 u8 regs[TOT_REGS];
58 static inline struct upd64083_state *to_state(struct v4l2_subdev *sd)
60 return container_of(sd, struct upd64083_state, sd);
63 /* Initial values when used in combination with the
64 NEC upd64031a ghost reduction chip. */
65 static u8 upd64083_init[] = {
66 0x1f, 0x01, 0xa0, 0x2d, 0x29, /* we use EXCSS=0 */
67 0x36, 0xdd, 0x05, 0x56, 0x48,
68 0x00, 0x3a, 0xa0, 0x05, 0x08,
69 0x44, 0x60, 0x08, 0x52, 0xf8,
70 0x53, 0x60, 0x10
73 /* ------------------------------------------------------------------------ */
75 static void upd64083_write(struct v4l2_subdev *sd, u8 reg, u8 val)
77 struct i2c_client *client = v4l2_get_subdevdata(sd);
78 u8 buf[2];
80 buf[0] = reg;
81 buf[1] = val;
82 v4l2_dbg(1, debug, sd, "write reg: %02x val: %02x\n", reg, val);
83 if (i2c_master_send(client, buf, 2) != 2)
84 v4l2_err(sd, "I/O error write 0x%02x/0x%02x\n", reg, val);
87 /* ------------------------------------------------------------------------ */
89 #ifdef CONFIG_VIDEO_ADV_DEBUG
90 static u8 upd64083_read(struct v4l2_subdev *sd, u8 reg)
92 struct i2c_client *client = v4l2_get_subdevdata(sd);
93 u8 buf[7];
95 if (reg >= sizeof(buf))
96 return 0xff;
97 i2c_master_recv(client, buf, sizeof(buf));
98 return buf[reg];
100 #endif
102 /* ------------------------------------------------------------------------ */
104 static int upd64083_s_routing(struct v4l2_subdev *sd,
105 u32 input, u32 output, u32 config)
107 struct upd64083_state *state = to_state(sd);
108 u8 r00, r02;
110 if (input > 7 || (input & 6) == 6)
111 return -EINVAL;
112 state->mode = (input & 3) << 6;
113 state->ext_y_adc = (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);
118 return 0;
121 #ifdef CONFIG_VIDEO_ADV_DEBUG
122 static int upd64083_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
124 reg->val = upd64083_read(sd, reg->reg & 0xff);
125 reg->size = 1;
126 return 0;
129 static int upd64083_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg)
131 upd64083_write(sd, reg->reg & 0xff, reg->val & 0xff);
132 return 0;
134 #endif
136 static int upd64083_log_status(struct v4l2_subdev *sd)
138 struct i2c_client *client = v4l2_get_subdevdata(sd);
139 u8 buf[7];
141 i2c_master_recv(client, buf, 7);
142 v4l2_info(sd, "Status: SA00=%02x SA01=%02x SA02=%02x SA03=%02x "
143 "SA04=%02x SA05=%02x SA06=%02x\n",
144 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
145 return 0;
148 /* ----------------------------------------------------------------------- */
150 static const struct v4l2_subdev_core_ops upd64083_core_ops = {
151 .log_status = upd64083_log_status,
152 #ifdef CONFIG_VIDEO_ADV_DEBUG
153 .g_register = upd64083_g_register,
154 .s_register = upd64083_s_register,
155 #endif
158 static const struct v4l2_subdev_video_ops upd64083_video_ops = {
159 .s_routing = upd64083_s_routing,
162 static const struct v4l2_subdev_ops upd64083_ops = {
163 .core = &upd64083_core_ops,
164 .video = &upd64083_video_ops,
167 /* ------------------------------------------------------------------------ */
169 /* i2c implementation */
171 static int upd64083_probe(struct i2c_client *client,
172 const struct i2c_device_id *id)
174 struct upd64083_state *state;
175 struct v4l2_subdev *sd;
176 int i;
178 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
179 return -EIO;
181 v4l_info(client, "chip found @ 0x%x (%s)\n",
182 client->addr << 1, client->adapter->name);
184 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
185 if (state == NULL)
186 return -ENOMEM;
187 sd = &state->sd;
188 v4l2_i2c_subdev_init(sd, client, &upd64083_ops);
189 /* Initially assume that a ghost reduction chip is present */
190 state->mode = 0; /* YCS mode */
191 state->ext_y_adc = (1 << 5);
192 memcpy(state->regs, upd64083_init, TOT_REGS);
193 for (i = 0; i < TOT_REGS; i++)
194 upd64083_write(sd, i, state->regs[i]);
195 return 0;
198 static int upd64083_remove(struct i2c_client *client)
200 struct v4l2_subdev *sd = i2c_get_clientdata(client);
202 v4l2_device_unregister_subdev(sd);
203 return 0;
206 /* ----------------------------------------------------------------------- */
208 static const struct i2c_device_id upd64083_id[] = {
209 { "upd64083", 0 },
212 MODULE_DEVICE_TABLE(i2c, upd64083_id);
214 static struct i2c_driver upd64083_driver = {
215 .driver = {
216 .name = "upd64083",
218 .probe = upd64083_probe,
219 .remove = upd64083_remove,
220 .id_table = upd64083_id,
223 module_i2c_driver(upd64083_driver);