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/tda9840.c b/drivers/media/video/tda9840.c
new file mode 100644
index 0000000..b5177c6
--- /dev/null
+++ b/drivers/media/video/tda9840.c
@@ -0,0 +1,254 @@
+ /*
+ tda9840 - i2c-driver for the tda9840 by SGS Thomson
+
+ Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>
+
+ The tda9840 is a stereo/dual sound processor with digital
+ identification. It can be found at address 0x84 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 as 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 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/ioctl.h>
+#include <linux/i2c.h>
+
+#include "tda9840.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 SWITCH 0x00
+#define LEVEL_ADJUST 0x02
+#define STEREO_ADJUST 0x03
+#define TEST 0x04
+
+/* addresses to scan, found only at 0x42 (7-Bit) */
+static unsigned short normal_i2c[] = { I2C_TDA9840, 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;
+
+static int command(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+ int result;
+ int byte = *(int *)arg;
+
+ switch (cmd) {
+ case TDA9840_SWITCH:
+
+ dprintk("TDA9840_SWITCH: 0x%02x\n", byte);
+
+ if (byte != TDA9840_SET_MONO
+ && byte != TDA9840_SET_MUTE
+ && byte != TDA9840_SET_STEREO
+ && byte != TDA9840_SET_LANG1
+ && byte != TDA9840_SET_LANG2
+ && byte != TDA9840_SET_BOTH
+ && byte != TDA9840_SET_BOTH_R
+ && byte != TDA9840_SET_EXTERNAL) {
+ return -EINVAL;
+ }
+
+ result = i2c_smbus_write_byte_data(client, SWITCH, byte);
+ if (result)
+ dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
+ break;
+
+ case TDA9840_LEVEL_ADJUST:
+
+ dprintk("TDA9840_LEVEL_ADJUST: %d\n", byte);
+
+ /* check for correct range */
+ if (byte > 25 || byte < -20)
+ return -EINVAL;
+
+ /* calculate actual value to set, see specs, page 18 */
+ byte /= 5;
+ if (0 < byte)
+ byte += 0x8;
+ else
+ byte = -byte;
+
+ result = i2c_smbus_write_byte_data(client, LEVEL_ADJUST, byte);
+ if (result)
+ dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
+ break;
+
+ case TDA9840_STEREO_ADJUST:
+
+ dprintk("TDA9840_STEREO_ADJUST: %d\n", byte);
+
+ /* check for correct range */
+ if (byte > 25 || byte < -24)
+ return -EINVAL;
+
+ /* calculate actual value to set */
+ byte /= 5;
+ if (0 < byte)
+ byte += 0x20;
+ else
+ byte = -byte;
+
+ result = i2c_smbus_write_byte_data(client, STEREO_ADJUST, byte);
+ if (result)
+ dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
+ break;
+
+ case TDA9840_DETECT: {
+ int *ret = (int *)arg;
+
+ byte = i2c_smbus_read_byte_data(client, STEREO_ADJUST);
+ if (byte == -1) {
+ dprintk("i2c_smbus_read_byte_data() failed\n");
+ return -EIO;
+ }
+
+ if (0 != (byte & 0x80)) {
+ dprintk("TDA9840_DETECT: register contents invalid\n");
+ return -EINVAL;
+ }
+
+ dprintk("TDA9840_DETECT: byte: 0x%02x\n", byte);
+ *ret = ((byte & 0x60) >> 5);
+ result = 0;
+ break;
+ }
+ case TDA9840_TEST:
+ dprintk("TDA9840_TEST: 0x%02x\n", byte);
+
+ /* mask out irrelevant bits */
+ byte &= 0x3;
+
+ result = i2c_smbus_write_byte_data(client, TEST, byte);
+ if (result)
+ dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result);
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ if (result)
+ return -EIO;
+
+ return 0;
+}
+
+static int detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *client;
+ int result = 0;
+
+ int byte = 0x0;
+
+ /* let's see whether this adapter can support what we need */
+ if (0 == i2c_check_functionality(adapter,
+ I2C_FUNC_SMBUS_READ_BYTE_DATA |
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) {
+ return 0;
+ }
+
+ /* allocate memory for client structure */
+ client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (0 == client) {
+ printk("not enough kernel memory\n");
+ 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 != (result = i2c_attach_client(client))) {
+ kfree(client);
+ return result;
+ }
+
+ /* set initial values for level & stereo - adjustment, mode */
+ byte = 0;
+ result = command(client, TDA9840_LEVEL_ADJUST, &byte);
+ result += command(client, TDA9840_STEREO_ADJUST, &byte);
+ byte = TDA9840_SET_MONO;
+ result = command(client, TDA9840_SWITCH, &byte);
+ if (result) {
+ dprintk("could not initialize tda9840\n");
+ return -ENODEV;
+ }
+
+ printk("tda9840: 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;
+}
+
+static struct i2c_driver driver = {
+ .owner = THIS_MODULE,
+ .name = "tda9840",
+ .id = I2C_DRIVERID_TDA9840,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = attach,
+ .detach_client = detach,
+ .command = command,
+};
+
+static struct i2c_client client_template = {
+ I2C_DEVNAME("tda9840"),
+ .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("tda9840 driver");
+MODULE_LICENSE("GPL");