tea6415c - i2c-driver for the tea6415c by SGS Thomson
Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
+ Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
The tea6415c is a bus controlled video-matrix-switch
with 8 inputs and 6 outputs.
#include <linux/module.h>
#include <linux/ioctl.h>
+#include <linux/slab.h>
#include <linux/i2c.h>
-
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-i2c-drv.h>
#include "tea6415c.h"
-static int debug = 0; /* insmod parameter */
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Turn on/off device debugging (default:off).");
-#define dprintk(args...) \
- do { if (debug) { printk("%s: %s()[%d]: ", KBUILD_MODNAME, __FUNCTION__, __LINE__); printk(args); } } while (0)
-
-#define TEA6415C_NUM_INPUTS 8
-#define TEA6415C_NUM_OUTPUTS 6
-
-/* addresses to scan, found only at 0x03 and/or 0x43 (7-bit) */
-static unsigned short normal_i2c[] = { I2C_TEA6415C_1, I2C_TEA6415C_2, I2C_CLIENT_END };
-
-/* magic definition of all other variables and things */
-I2C_CLIENT_INSMOD;
-
-static struct i2c_driver driver;
-static struct i2c_client client_template;
-
-/* this function is called by i2c_probe */
-static int detect(struct i2c_adapter *adapter, int address, int kind)
-{
- struct i2c_client *client = NULL;
- int err = 0;
-
- /* let's see whether this adapter can support what we need */
- if (0 == i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE)) {
- return 0;
- }
-
- /* allocate memory for client structure */
- client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (0 == client) {
- return -ENOMEM;
- }
-
- /* fill client structure */
- memcpy(client, &client_template, sizeof(struct i2c_client));
- client->addr = address;
- client->adapter = adapter;
-
- /* tell the i2c layer a new client has arrived */
- if (0 != (err = i2c_attach_client(client))) {
- kfree(client);
- return err;
- }
-
- printk("tea6415c: detected @ 0x%02x on adapter %s\n", address, &client->adapter->name[0]);
-
- return 0;
-}
+MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
+MODULE_DESCRIPTION("tea6415c driver");
+MODULE_LICENSE("GPL");
-static int attach(struct i2c_adapter *adapter)
-{
- /* let's see whether this is a know adapter we can attach to */
- if (adapter->id != I2C_HW_SAA7146) {
- dprintk("refusing to probe on unknown adapter [name='%s',id=0x%x]\n", adapter->name, adapter->id);
- return -ENODEV;
- }
+static int debug;
+module_param(debug, int, 0644);
- return i2c_probe(adapter, &addr_data, &detect);
-}
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
-static int detach(struct i2c_client *client)
-{
- int ret = i2c_detach_client(client);
- kfree(client);
- return ret;
-}
-/* makes a connection between the input-pin 'i' and the output-pin 'o'
- for the tea6415c-client 'client' */
-static int switch_matrix(struct i2c_client *client, int i, int o)
+/* makes a connection between the input-pin 'i' and the output-pin 'o' */
+static int tea6415c_s_routing(struct v4l2_subdev *sd,
+ u32 i, u32 o, u32 config)
{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
u8 byte = 0;
int ret;
- dprintk("adr:0x%02x, i:%d, o:%d\n", client->addr, i, o);
+ v4l2_dbg(1, debug, sd, "i=%d, o=%d\n", i, o);
/* check if the pins are valid */
if (0 == ((1 == i || 3 == i || 5 == i || 6 == i || 8 == i || 10 == i || 20 == i || 11 == i)
&& (18 == o || 17 == o || 16 == o || 15 == o || 14 == o || 13 == o)))
- return -1;
+ return -EINVAL;
/* to understand this, have a look at the tea6415c-specs (p.5) */
switch (o) {
ret = i2c_smbus_write_byte(client, byte);
if (ret) {
- dprintk("i2c_smbus_write_byte() failed, ret:%d\n", ret);
+ v4l2_dbg(1, debug, sd,
+ "i2c_smbus_write_byte() failed, ret:%d\n", ret);
return -EIO;
}
-
return ret;
}
-static int command(struct i2c_client *client, unsigned int cmd, void *arg)
+static int tea6415c_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
- struct tea6415c_multiplex *v = (struct tea6415c_multiplex *)arg;
- int result = 0;
-
- switch (cmd) {
- case TEA6415C_SWITCH:
- result = switch_matrix(client, v->in, v->out);
- break;
- default:
- return -ENOIOCTLCMD;
- }
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
- return result;
+ return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_TEA6415C, 0);
}
-static struct i2c_driver driver = {
- .driver = {
- .name = "tea6415c",
- },
- .id = I2C_DRIVERID_TEA6415C,
- .attach_adapter = attach,
- .detach_client = detach,
- .command = command,
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops tea6415c_core_ops = {
+ .g_chip_ident = tea6415c_g_chip_ident,
};
-static struct i2c_client client_template = {
- .name = "tea6415c",
- .driver = &driver,
+static const struct v4l2_subdev_video_ops tea6415c_video_ops = {
+ .s_routing = tea6415c_s_routing,
};
-static int __init this_module_init(void)
+static const struct v4l2_subdev_ops tea6415c_ops = {
+ .core = &tea6415c_core_ops,
+ .video = &tea6415c_video_ops,
+};
+
+static int tea6415c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- return i2c_add_driver(&driver);
+ struct v4l2_subdev *sd;
+
+ /* let's see whether this adapter can support what we need */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WRITE_BYTE))
+ return 0;
+
+ v4l_info(client, "chip found @ 0x%x (%s)\n",
+ client->addr << 1, client->adapter->name);
+ sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
+ if (sd == NULL)
+ return -ENOMEM;
+ v4l2_i2c_subdev_init(sd, client, &tea6415c_ops);
+ return 0;
}
-static void __exit this_module_exit(void)
+static int tea6415c_remove(struct i2c_client *client)
{
- i2c_del_driver(&driver);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ v4l2_device_unregister_subdev(sd);
+ kfree(sd);
+ return 0;
}
-module_init(this_module_init);
-module_exit(this_module_exit);
+static const struct i2c_device_id tea6415c_id[] = {
+ { "tea6415c", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tea6415c_id);
-MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
-MODULE_DESCRIPTION("tea6415c driver");
-MODULE_LICENSE("GPL");
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+ .name = "tea6415c",
+ .probe = tea6415c_probe,
+ .remove = tea6415c_remove,
+ .id_table = tea6415c_id,
+};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff