projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ec367c3c HV |
1 | /* |
| 2 | * Copyright (C) 2005-2006 Micronas USA Inc. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License (Version 2) as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope that it will be useful, | |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 11 | * GNU General Public License for more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License | |
| 14 | * along with this program; if not, write to the Free Software Foundation, | |
| 15 | * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/init.h> | |
| 19 | #include <linux/module.h> | |
| 20 | #include <linux/i2c.h> | |
| 21 | #include <linux/videodev2.h> | |
| 22 | #include <media/v4l2-device.h> | |
| 23 | #include <media/v4l2-chip-ident.h> | |
| 24 | #include <linux/slab.h> | |
| 25 | ||
| 26 | MODULE_DESCRIPTION("OmniVision ov7640 sensor driver"); | |
| 27 | MODULE_LICENSE("GPL v2"); | |
| 28 | ||
| 29 | static const u8 initial_registers[] = { | |
| 30 | 0x12, 0x80, | |
| 31 | 0x12, 0x54, | |
| 32 | 0x14, 0x24, | |
| 33 | 0x15, 0x01, | |
| 34 | 0x28, 0x20, | |
| 35 | 0x75, 0x82, | |
| 36 | 0xFF, 0xFF, /* Terminator (reg 0xFF is unused) */ | |
| 37 | }; | |
| 38 | ||
| 39 | static int write_regs(struct i2c_client *client, const u8 *regs) | |
| 40 | { | |
| 41 | int i; | |
| 42 | ||
| 43 | for (i = 0; regs[i] != 0xFF; i += 2) | |
| 44 | if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0) | |
| 45 | return -1; | |
| 46 | return 0; | |
| 47 | } | |
| 48 | ||
| 49 | /* ----------------------------------------------------------------------- */ | |
| 50 | ||
| 51 | static const struct v4l2_subdev_ops ov7640_ops; | |
| 52 | ||
| 53 | static int ov7640_probe(struct i2c_client *client, | |
| 54 | const struct i2c_device_id *id) | |
| 55 | { | |
| 56 | struct i2c_adapter *adapter = client->adapter; | |
| 57 | struct v4l2_subdev *sd; | |
| 58 | ||
| 59 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
| 60 | return -ENODEV; | |
| 61 | ||
| 62 | sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); | |
| 63 | if (sd == NULL) | |
| 64 | return -ENOMEM; | |
| 65 | v4l2_i2c_subdev_init(sd, client, &ov7640_ops); | |
| 66 | ||
| 67 | client->flags = I2C_CLIENT_SCCB; | |
| 68 | ||
| 69 | v4l_info(client, "chip found @ 0x%02x (%s)\n", | |
| 70 | client->addr << 1, client->adapter->name); | |
| 71 | ||
| 72 | if (write_regs(client, initial_registers) < 0) { | |
| 73 | v4l_err(client, "error initializing OV7640\n"); | |
| 74 | kfree(sd); | |
| 75 | return -ENODEV; | |
| 76 | } | |
| 77 | ||
| 78 | return 0; | |
| 79 | } | |
| 80 | ||
| 81 | ||
| 82 | static int ov7640_remove(struct i2c_client *client) | |
| 83 | { | |
| 84 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
| 85 | ||
| 86 | v4l2_device_unregister_subdev(sd); | |
| 87 | kfree(sd); | |
| 88 | return 0; | |
| 89 | } | |
| 90 | ||
| 91 | static const struct i2c_device_id ov7640_id[] = { | |
| 92 | { "ov7640", 0 }, | |
| 93 | { } | |
| 94 | }; | |
| 95 | MODULE_DEVICE_TABLE(i2c, ov7640_id); | |
| 96 | ||
| 97 | static struct i2c_driver ov7640_driver = { | |
| 98 | .driver = { | |
| 99 | .owner = THIS_MODULE, | |
| 100 | .name = "ov7640", | |
| 101 | }, | |
| 102 | .probe = ov7640_probe, | |
| 103 | .remove = ov7640_remove, | |
| 104 | .id_table = ov7640_id, | |
| 105 | }; | |
| 106 | module_i2c_driver(ov7640_driver); |