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author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-15 16:53:09 -0800 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-10 15:31:08 -0700 |
commit | 866b8695d67e83f47194731d3a7ba55826a7ec70 (patch) | |
tree | 946a4850d3850edeac3634e6d4dd24928779f0c5 /drivers/staging/go7007/wis-ov7640.c | |
parent | c0f005888c6663898a040cd922947dd8caa55160 (diff) | |
download | op-kernel-dev-866b8695d67e83f47194731d3a7ba55826a7ec70.zip op-kernel-dev-866b8695d67e83f47194731d3a7ba55826a7ec70.tar.gz |
Staging: add the go7007 video driver
Todo:
- checkpatch.pl cleanups
- sparse cleanups
- lots of little modules, should be merged together
and added to the build.
- testing?
- handle churn in v4l layer.
Many thanks to Ross Cohen <rcohen@snurgle.org> for cleanup patches on
this driver.
Cc: Ross Cohen <rcohen@snurgle.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/go7007/wis-ov7640.c')
-rw-r--r-- | drivers/staging/go7007/wis-ov7640.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/staging/go7007/wis-ov7640.c b/drivers/staging/go7007/wis-ov7640.c new file mode 100644 index 0000000..815615a --- /dev/null +++ b/drivers/staging/go7007/wis-ov7640.c @@ -0,0 +1,131 @@ +/* + * Copyright (C) 2005-2006 Micronas USA Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License (Version 2) as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/version.h> +#include <linux/i2c.h> +#include <linux/videodev.h> +#include <linux/video_decoder.h> + +#include "wis-i2c.h" + +struct wis_ov7640 { + int brightness; + int contrast; + int saturation; + int hue; +}; + +static u8 initial_registers[] = +{ + 0x12, 0x80, + 0x12, 0x54, + 0x14, 0x24, + 0x15, 0x01, + 0x28, 0x20, + 0x75, 0x82, + 0xFF, 0xFF, /* Terminator (reg 0xFF is unused) */ +}; + +static int write_regs(struct i2c_client *client, u8 *regs) +{ + int i; + + for (i = 0; regs[i] != 0xFF; i += 2) + if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0) + return -1; + return 0; +} + +static struct i2c_driver wis_ov7640_driver; + +static struct i2c_client wis_ov7640_client_templ = { + .name = "OV7640 (WIS)", + .driver = &wis_ov7640_driver, +}; + +static int wis_ov7640_detect(struct i2c_adapter *adapter, int addr, int kind) +{ + struct i2c_client *client; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return 0; + + client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (client == NULL) + return -ENOMEM; + memcpy(client, &wis_ov7640_client_templ, + sizeof(wis_ov7640_client_templ)); + client->adapter = adapter; + client->addr = addr; + client->flags = I2C_CLIENT_SCCB; + + printk(KERN_DEBUG + "wis-ov7640: initializing OV7640 at address %d on %s\n", + addr, adapter->name); + + if (write_regs(client, initial_registers) < 0) { + printk(KERN_ERR "wis-ov7640: error initializing OV7640\n"); + kfree(client); + return 0; + } + + i2c_attach_client(client); + return 0; +} + +static int wis_ov7640_detach(struct i2c_client *client) +{ + int r; + + r = i2c_detach_client(client); + if (r < 0) + return r; + + kfree(client); + return 0; +} + +static struct i2c_driver wis_ov7640_driver = { + .driver = { + .name = "WIS OV7640 I2C driver", + }, + .id = I2C_DRIVERID_WIS_OV7640, + .detach_client = wis_ov7640_detach, +}; + +static int __init wis_ov7640_init(void) +{ + int r; + + r = i2c_add_driver(&wis_ov7640_driver); + if (r < 0) + return r; + return wis_i2c_add_driver(wis_ov7640_driver.id, wis_ov7640_detect); +} + +static void __exit wis_ov7640_cleanup(void) +{ + wis_i2c_del_driver(wis_ov7640_detect); + i2c_del_driver(&wis_ov7640_driver); +} + +module_init(wis_ov7640_init); +module_exit(wis_ov7640_cleanup); + +MODULE_LICENSE("GPL v2"); |