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!
diff --git a/drivers/media/video/tea6415c.c b/drivers/media/video/tea6415c.c
new file mode 100644
index 0000000..3ec3955
--- /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");