diff options
Diffstat (limited to 'drivers/media/video/tea6415c.c')
| -rw-r--r-- | drivers/media/video/tea6415c.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/drivers/media/video/tea6415c.c b/drivers/media/video/tea6415c.c deleted file mode 100644 index 421c1445e96..00000000000 --- a/drivers/media/video/tea6415c.c +++ /dev/null @@ -1,224 +0,0 @@ - /* - 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; /* 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, __func__, __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 (!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_HW_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 = { - .driver = { - .name = "tea6415c", - }, - .id = I2C_DRIVERID_TEA6415C, - .attach_adapter = attach, - .detach_client = detach, - .command = command, -}; - -static struct i2c_client client_template = { - .name = "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"); |