Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 223 insertions, 0 deletions

diff --git a/drivers/media/video/tea6415c.c b/drivers/media/video/tea6415c.c
new file mode 100644
index 000000000000..3ec39550bf46
--- /dev/null
+++ b/drivers/media/video/tea6415c.c
@@ -0,0 +1,223 @@
+ /*
+    tea6415c - i2c-driver for the tea6415c by SGS Thomson
+
+    Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
+
+    The tea6415c is a bus controlled video-matrix-switch
+    with 8 inputs and 6 outputs.
+    It is cascadable, i.e. it can be found at the addresses
+    0x86 and 0x06 on the i2c-bus.
+
+    For detailed informations download the specifications directly
+    from SGS Thomson at http://www.st.com
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License vs published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    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., 675 Mvss Ave, Cambridge, MA 02139, USA.
+  */
+
+#include <linux/module.h>
+#include <linux/ioctl.h>
+#include <linux/i2c.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]: ",__stringify(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 };
+static unsigned short normal_i2c_range[] = { 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;
+}
+
+static int attach(struct i2c_adapter *adapter)
+{
+	/* let's see whether this is a know adapter we can attach to */
+	if (adapter->id != I2C_ALGO_SAA7146) {
+		dprintk("refusing to probe on unknown adapter [name='%s',id=0x%x]\n", adapter->name, adapter->id);
+		return -ENODEV;
+	}
+
+	return i2c_probe(adapter, &addr_data, &detect);
+}
+
+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)
+{
+	u8 byte = 0;
+	int ret;
+	
+	dprintk("adr:0x%02x, i:%d, o:%d\n", client->addr, 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;
+
+	/* to understand this, have a look at the tea6415c-specs (p.5) */
+	switch (o) {
+	case 18:
+		byte = 0x00;
+		break;
+	case 14:
+		byte = 0x20;
+		break;
+	case 16:
+		byte = 0x10;
+		break;
+	case 17:
+		byte = 0x08;
+		break;
+	case 15:
+		byte = 0x18;
+		break;
+	case 13:
+		byte = 0x28;
+		break;
+	};
+
+	switch (i) {
+	case 5:
+		byte |= 0x00;
+		break;
+	case 8:
+		byte |= 0x04;
+		break;
+	case 3:
+		byte |= 0x02;
+		break;
+	case 20:
+		byte |= 0x06;
+		break;
+	case 6:
+		byte |= 0x01;
+		break;
+	case 10:
+		byte |= 0x05;
+		break;
+	case 1:
+		byte |= 0x03;
+		break;
+	case 11:
+		byte |= 0x07;
+		break;
+	};
+
+	ret = i2c_smbus_write_byte(client, byte);
+	if (ret) {
+		dprintk("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)
+{
+	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;
+	}
+
+	return result;
+}
+
+static struct i2c_driver driver = {
+	.owner	= THIS_MODULE,
+	.name 	= "tea6415c",
+	.id 	= I2C_DRIVERID_TEA6415C,
+	.flags 	= I2C_DF_NOTIFY,
+	.attach_adapter	= attach,
+	.detach_client	= detach,
+	.command	= command,
+};
+
+static struct i2c_client client_template = {
+	I2C_DEVNAME("tea6415c"),
+	.driver = &driver,
+};
+
+static int __init this_module_init(void)
+{
+	return i2c_add_driver(&driver);
+}
+
+static void __exit this_module_exit(void)
+{
+	i2c_del_driver(&driver);
+}
+
+module_init(this_module_init);
+module_exit(this_module_exit);
+
+MODULE_AUTHOR("Michael Hunold <michael@mihu.de>");
+MODULE_DESCRIPTION("tea6415c driver");
+MODULE_LICENSE("GPL");