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>
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");