linux/drivers/media/video/tuner-3036.c
Jean Delvare c7a46533ff [PATCH] I2C: Kill i2c_algorithm.id (5/7)
Merge the algorithm id part (16 upper bits) of the i2c adapters ids
into the definition of the adapters ids directly. After that, we don't
need to OR both ids together for each i2c_adapter structure.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-05 09:14:31 -07:00

215 lines
4.9 KiB
C

/*
* Driver for Philips SAB3036 "CITAC" tuner control chip.
*
* Author: Phil Blundell <philb@gnu.org>
*
* The SAB3036 is just about different enough from the chips that
* tuner.c copes with to make it not worth the effort to crowbar
* the support into that file. So instead we have a separate driver.
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev.h>
#include <media/tuner.h>
static int debug; /* insmod parameter */
static int this_adap;
static struct i2c_client client_template;
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x60, 0x61, I2C_CLIENT_END };
static unsigned short ignore = I2C_CLIENT_END;
static struct i2c_client_address_data addr_data = {
.normal_i2c = normal_i2c,
.probe = &ignore,
.ignore = &ignore,
};
/* ---------------------------------------------------------------------- */
static unsigned char
tuner_getstatus (struct i2c_client *c)
{
unsigned char byte;
if (i2c_master_recv(c, &byte, 1) != 1)
printk(KERN_ERR "tuner-3036: I/O error.\n");
return byte;
}
#define TUNER_FL 0x80
static int
tuner_islocked (struct i2c_client *c)
{
return (tuner_getstatus(c) & TUNER_FL);
}
/* ---------------------------------------------------------------------- */
static void
set_tv_freq(struct i2c_client *c, int freq)
{
u16 div = ((freq * 20) / 16);
unsigned long give_up = jiffies + HZ;
unsigned char buffer[2];
if (debug)
printk(KERN_DEBUG "tuner: setting frequency %dMHz, divisor %x\n", freq / 16, div);
/* Select high tuning current */
buffer[0] = 0x29;
buffer[1] = 0x3e;
if (i2c_master_send(c, buffer, 2) != 2)
printk("tuner: i2c i/o error 1\n");
buffer[0] = 0x80 | ((div>>8) & 0x7f);
buffer[1] = div & 0xff;
if (i2c_master_send(c, buffer, 2) != 2)
printk("tuner: i2c i/o error 2\n");
while (!tuner_islocked(c) && time_before(jiffies, give_up))
schedule();
if (!tuner_islocked(c))
printk(KERN_WARNING "tuner: failed to achieve PLL lock\n");
/* Select low tuning current and engage AFC */
buffer[0] = 0x29;
buffer[1] = 0xb2;
if (i2c_master_send(c, buffer, 2) != 2)
printk("tuner: i2c i/o error 3\n");
if (debug)
printk(KERN_DEBUG "tuner: status %02x\n", tuner_getstatus(c));
}
/* ---------------------------------------------------------------------- */
static int
tuner_attach(struct i2c_adapter *adap, int addr, int kind)
{
static unsigned char buffer[] = { 0x29, 0x32, 0x2a, 0, 0x2b, 0 };
struct i2c_client *client;
if (this_adap > 0)
return -1;
this_adap++;
client_template.adapter = adap;
client_template.addr = addr;
client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == NULL)
return -ENOMEM;
memcpy(client, &client_template, sizeof(struct i2c_client));
printk("tuner: SAB3036 found, status %02x\n", tuner_getstatus(client));
i2c_attach_client(client);
if (i2c_master_send(client, buffer, 2) != 2)
printk("tuner: i2c i/o error 1\n");
if (i2c_master_send(client, buffer+2, 2) != 2)
printk("tuner: i2c i/o error 2\n");
if (i2c_master_send(client, buffer+4, 2) != 2)
printk("tuner: i2c i/o error 3\n");
return 0;
}
static int
tuner_detach(struct i2c_client *c)
{
return 0;
}
static int
tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
int *iarg = (int*)arg;
switch (cmd)
{
case VIDIOCSFREQ:
set_tv_freq(client, *iarg);
break;
default:
return -EINVAL;
}
return 0;
}
static int
tuner_probe(struct i2c_adapter *adap)
{
this_adap = 0;
if (adap->id == I2C_HW_B_LP)
return i2c_probe(adap, &addr_data, tuner_attach);
return 0;
}
/* ----------------------------------------------------------------------- */
static struct i2c_driver
i2c_driver_tuner =
{
.owner = THIS_MODULE,
.name = "sab3036",
.id = I2C_DRIVERID_SAB3036,
.flags = I2C_DF_NOTIFY,
.attach_adapter = tuner_probe,
.detach_client = tuner_detach,
.command = tuner_command
};
static struct i2c_client client_template =
{
.driver = &i2c_driver_tuner,
.name = "SAB3036",
};
static int __init
tuner3036_init(void)
{
i2c_add_driver(&i2c_driver_tuner);
return 0;
}
static void __exit
tuner3036_exit(void)
{
i2c_del_driver(&i2c_driver_tuner);
}
MODULE_DESCRIPTION("SAB3036 tuner driver");
MODULE_AUTHOR("Philip Blundell <philb@gnu.org>");
MODULE_LICENSE("GPL");
module_param(debug, int, 0);
MODULE_PARM_DESC(debug,"Enable debugging output");
module_init(tuner3036_init);
module_exit(tuner3036_exit);