c365864faf
- Added support for the terratec cinergy 250 usb tv remote Signed-off-by: Markus Rechberger <mrechberger@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
440 lines
10 KiB
C
440 lines
10 KiB
C
/*
|
|
em2820-i2c.c - driver for Empia EM2820/2840 USB video capture devices
|
|
|
|
Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
|
|
Ludovico Cavedon <cavedon@sssup.it>
|
|
Mauro Carvalho Chehab <mchehab@brturbo.com.br>
|
|
|
|
Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
|
|
|
|
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/kernel.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/i2c.h>
|
|
#include <media/tuner.h>
|
|
#include <linux/video_decoder.h>
|
|
|
|
/* To be moved to compat.h */
|
|
#if !defined(I2C_HW_B_EM2820)
|
|
#define I2C_HW_B_EM2820 0x99
|
|
#endif
|
|
|
|
#include "em2820.h"
|
|
|
|
/* ----------------------------------------------------------- */
|
|
|
|
static unsigned int i2c_scan = 0;
|
|
module_param(i2c_scan, int, 0444);
|
|
MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
|
|
|
|
static unsigned int i2c_debug = 0;
|
|
module_param(i2c_debug, int, 0644);
|
|
MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
|
|
|
|
#define dprintk(fmt, args...) if (i2c_debug) do {\
|
|
printk(KERN_DEBUG "%s: %s: " fmt "\n",\
|
|
dev->name, __FUNCTION__ , ##args); } while (0)
|
|
#define dprintk1(fmt, args...) if (i2c_debug) do{ \
|
|
printk(KERN_DEBUG "%s: %s: " fmt, \
|
|
dev->name, __FUNCTION__ , ##args); } while (0)
|
|
#define dprintk2(fmt, args...) if (i2c_debug) do {\
|
|
printk(fmt , ##args); } while (0)
|
|
|
|
/*
|
|
* i2c_send_bytes()
|
|
* untested for more than 4 bytes
|
|
*/
|
|
static int i2c_send_bytes(void *data, unsigned char addr, char *buf, short len,
|
|
int stop)
|
|
{
|
|
int wrcount = 0;
|
|
struct em2820 *dev = (struct em2820 *)data;
|
|
|
|
wrcount = dev->em2820_write_regs_req(dev, stop ? 2 : 3, addr, buf, len);
|
|
|
|
return wrcount;
|
|
}
|
|
|
|
/*
|
|
* i2c_recv_byte()
|
|
* read a byte from the i2c device
|
|
*/
|
|
static int i2c_recv_bytes(struct em2820 *dev, unsigned char addr, char *buf,
|
|
int len)
|
|
{
|
|
int ret;
|
|
ret = dev->em2820_read_reg_req_len(dev, 2, addr, buf, len);
|
|
if (ret < 0) {
|
|
em2820_warn("reading i2c device failed (error=%i)\n", ret);
|
|
return ret;
|
|
}
|
|
if (dev->em2820_read_reg(dev, 0x5) != 0)
|
|
return -ENODEV;
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* i2c_check_for_device()
|
|
* check if there is a i2c_device at the supplied address
|
|
*/
|
|
static int i2c_check_for_device(struct em2820 *dev, unsigned char addr)
|
|
{
|
|
char msg;
|
|
int ret;
|
|
msg = addr;
|
|
|
|
ret = dev->em2820_read_reg_req(dev, 2, addr);
|
|
if (ret < 0) {
|
|
em2820_warn("reading from i2c device failed (error=%i)\n", ret);
|
|
return ret;
|
|
}
|
|
if (dev->em2820_read_reg(dev, 0x5) != 0)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* em2820_i2c_xfer()
|
|
* the main i2c transfer function
|
|
*/
|
|
static int em2820_i2c_xfer(struct i2c_adapter *i2c_adap,
|
|
struct i2c_msg msgs[], int num)
|
|
{
|
|
struct em2820 *dev = i2c_adap->algo_data;
|
|
int addr, rc, i, byte;
|
|
|
|
if (num <= 0)
|
|
return 0;
|
|
for (i = 0; i < num; i++) {
|
|
addr = msgs[i].addr << 1;
|
|
dprintk1("%s %s addr=%x len=%d:",
|
|
(msgs[i].flags & I2C_M_RD) ? "read" : "write",
|
|
i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
|
|
if (!msgs[i].len) { /* no len: check only for device presence */
|
|
rc = i2c_check_for_device(dev, addr);
|
|
if (rc < 0) {
|
|
dprintk2(" no device\n");
|
|
return rc;
|
|
}
|
|
|
|
}
|
|
if (msgs[i].flags & I2C_M_RD) {
|
|
/* read bytes */
|
|
|
|
rc = i2c_recv_bytes(dev, addr, msgs[i].buf,
|
|
msgs[i].len);
|
|
if (i2c_debug) {
|
|
for (byte = 0; byte < msgs[i].len; byte++) {
|
|
printk(" %02x", msgs[i].buf[byte]);
|
|
}
|
|
}
|
|
} else {
|
|
/* write bytes */
|
|
if (i2c_debug) {
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
|
printk(" %02x", msgs[i].buf[byte]);
|
|
}
|
|
rc = i2c_send_bytes(dev, addr, msgs[i].buf, msgs[i].len,
|
|
i == num - 1);
|
|
if (rc < 0)
|
|
goto err;
|
|
}
|
|
if (i2c_debug)
|
|
printk("\n");
|
|
}
|
|
|
|
return num;
|
|
err:
|
|
dprintk2(" ERROR: %i\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
static int em2820_i2c_eeprom(struct em2820 *dev, unsigned char *eedata, int len)
|
|
{
|
|
unsigned char buf, *p = eedata;
|
|
struct em2820_eeprom *em_eeprom = (void *)eedata;
|
|
int i, err, size = len, block;
|
|
|
|
dev->i2c_client.addr = 0xa0 >> 1;
|
|
buf = 0;
|
|
if (1 != (err = i2c_master_send(&dev->i2c_client, &buf, 1))) {
|
|
printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
|
|
dev->name, err);
|
|
return -1;
|
|
}
|
|
while (size > 0) {
|
|
if (size > 16)
|
|
block = 16;
|
|
else
|
|
block = size;
|
|
|
|
if (block !=
|
|
(err = i2c_master_recv(&dev->i2c_client, p, block))) {
|
|
printk(KERN_WARNING
|
|
"%s: i2c eeprom read error (err=%d)\n",
|
|
dev->name, err);
|
|
return -1;
|
|
}
|
|
size -= block;
|
|
p += block;
|
|
}
|
|
for (i = 0; i < len; i++) {
|
|
if (0 == (i % 16))
|
|
printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
|
|
printk(" %02x", eedata[i]);
|
|
if (15 == (i % 16))
|
|
printk("\n");
|
|
}
|
|
|
|
printk(KERN_INFO "EEPROM ID= 0x%08x\n", em_eeprom->id);
|
|
printk(KERN_INFO "Vendor/Product ID= %04x:%04x\n", em_eeprom->vendor_ID,
|
|
em_eeprom->product_ID);
|
|
|
|
switch (em_eeprom->chip_conf >> 4 & 0x3) {
|
|
case 0:
|
|
printk(KERN_INFO "No audio on board.\n");
|
|
break;
|
|
case 1:
|
|
printk(KERN_INFO "AC97 audio (5 sample rates)\n");
|
|
break;
|
|
case 2:
|
|
printk(KERN_INFO "I2S audio, sample rate=32k\n");
|
|
break;
|
|
case 3:
|
|
printk(KERN_INFO "I2S audio, 3 sample rates\n");
|
|
break;
|
|
}
|
|
|
|
if (em_eeprom->chip_conf & 1 << 3)
|
|
printk(KERN_INFO "USB Remote wakeup capable\n");
|
|
|
|
if (em_eeprom->chip_conf & 1 << 2)
|
|
printk(KERN_INFO "USB Self power capable\n");
|
|
|
|
switch (em_eeprom->chip_conf & 0x3) {
|
|
case 0:
|
|
printk(KERN_INFO "500mA max power\n");
|
|
break;
|
|
case 1:
|
|
printk(KERN_INFO "400mA max power\n");
|
|
break;
|
|
case 2:
|
|
printk(KERN_INFO "300mA max power\n");
|
|
break;
|
|
case 3:
|
|
printk(KERN_INFO "200mA max power\n");
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* ----------------------------------------------------------- */
|
|
|
|
/*
|
|
* algo_control()
|
|
*/
|
|
static int algo_control(struct i2c_adapter *adapter,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* functionality()
|
|
*/
|
|
static u32 functionality(struct i2c_adapter *adap)
|
|
{
|
|
return I2C_FUNC_SMBUS_EMUL;
|
|
}
|
|
|
|
#ifndef I2C_PEC
|
|
static void inc_use(struct i2c_adapter *adap)
|
|
{
|
|
MOD_INC_USE_COUNT;
|
|
}
|
|
|
|
static void dec_use(struct i2c_adapter *adap)
|
|
{
|
|
MOD_DEC_USE_COUNT;
|
|
}
|
|
#endif
|
|
|
|
static int em2820_set_tuner(int check_eeprom, struct i2c_client *client)
|
|
{
|
|
struct em2820 *dev = client->adapter->algo_data;
|
|
struct tuner_setup tun_setup;
|
|
|
|
if (dev->has_tuner) {
|
|
tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
|
|
tun_setup.type = dev->tuner_type;
|
|
tun_setup.addr = dev->tuner_addr;
|
|
|
|
em2820_i2c_call_clients(dev, TUNER_SET_TYPE_ADDR, &tun_setup);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* attach_inform()
|
|
* gets called when a device attaches to the i2c bus
|
|
* does some basic configuration
|
|
*/
|
|
static int attach_inform(struct i2c_client *client)
|
|
{
|
|
struct em2820 *dev = client->adapter->algo_data;
|
|
|
|
dprintk("address %x", client->addr << 1);
|
|
switch (client->addr << 1) {
|
|
case 0x86:
|
|
em2820_i2c_call_clients(dev, TDA9887_SET_CONFIG, &dev->tda9887_conf);
|
|
break;
|
|
case 0x4a:
|
|
dprintk1("attach_inform: saa7113 detected.\n");
|
|
break;
|
|
case 0xa0:
|
|
dprintk1("attach_inform: eeprom detected.\n");
|
|
break;
|
|
case 0x80:
|
|
case 0x88:
|
|
dprintk1("attach_inform: msp34xx detected.\n");
|
|
break;
|
|
case 0xb8:
|
|
case 0xba:
|
|
dprintk1("attach_inform: tvp5150 detected.\n");
|
|
break;
|
|
default:
|
|
dev->tuner_addr = client->addr;
|
|
em2820_set_tuner(-1, client);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_algorithm em2820_algo = {
|
|
.master_xfer = em2820_i2c_xfer,
|
|
.algo_control = algo_control,
|
|
.functionality = functionality,
|
|
};
|
|
|
|
static struct i2c_adapter em2820_adap_template = {
|
|
#ifdef I2C_PEC
|
|
.owner = THIS_MODULE,
|
|
#else
|
|
.inc_use = inc_use,
|
|
.dec_use = dec_use,
|
|
#endif
|
|
#ifdef I2C_CLASS_TV_ANALOG
|
|
.class = I2C_CLASS_TV_ANALOG,
|
|
#endif
|
|
.name = "em2820",
|
|
.id = I2C_HW_B_EM2820,
|
|
.algo = &em2820_algo,
|
|
.client_register = attach_inform,
|
|
};
|
|
|
|
static struct i2c_client em2820_client_template = {
|
|
.name = "em2820 internal",
|
|
.flags = I2C_CLIENT_ALLOW_USE,
|
|
};
|
|
|
|
/* ----------------------------------------------------------- */
|
|
|
|
/*
|
|
* i2c_devs
|
|
* incomplete list of known devices
|
|
*/
|
|
static char *i2c_devs[128] = {
|
|
[0x4a >> 1] = "saa7113h",
|
|
[0x60 >> 1] = "remote IR sensor",
|
|
[0x86 >> 1] = "tda9887",
|
|
[0x80 >> 1] = "msp34xx",
|
|
[0x88 >> 1] = "msp34xx",
|
|
[0xa0 >> 1] = "eeprom",
|
|
[0xb8 >> 1] = "tvp5150a",
|
|
[0xba >> 1] = "tvp5150a",
|
|
[0xc0 >> 1] = "tuner (analog)",
|
|
[0xc2 >> 1] = "tuner (analog)",
|
|
[0xc4 >> 1] = "tuner (analog)",
|
|
[0xc6 >> 1] = "tuner (analog)",
|
|
};
|
|
|
|
/*
|
|
* do_i2c_scan()
|
|
* check i2c address range for devices
|
|
*/
|
|
static void do_i2c_scan(char *name, struct i2c_client *c)
|
|
{
|
|
unsigned char buf;
|
|
int i, rc;
|
|
|
|
for (i = 0; i < 128; i++) {
|
|
c->addr = i;
|
|
rc = i2c_master_recv(c, &buf, 0);
|
|
if (rc < 0)
|
|
continue;
|
|
printk(KERN_INFO "%s: found device @ 0x%x [%s]", name,
|
|
i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* em2820_i2c_call_clients()
|
|
* send commands to all attached i2c devices
|
|
*/
|
|
void em2820_i2c_call_clients(struct em2820 *dev, unsigned int cmd, void *arg)
|
|
{
|
|
BUG_ON(NULL == dev->i2c_adap.algo_data);
|
|
i2c_clients_command(&dev->i2c_adap, cmd, arg);
|
|
}
|
|
|
|
/*
|
|
* em2820_i2c_register()
|
|
* register i2c bus
|
|
*/
|
|
int em2820_i2c_register(struct em2820 *dev)
|
|
{
|
|
BUG_ON(!dev->em2820_write_regs || !dev->em2820_read_reg);
|
|
BUG_ON(!dev->em2820_write_regs_req || !dev->em2820_read_reg_req);
|
|
dev->i2c_adap = em2820_adap_template;
|
|
dev->i2c_adap.dev.parent = &dev->udev->dev;
|
|
strcpy(dev->i2c_adap.name, dev->name);
|
|
dev->i2c_adap.algo_data = dev;
|
|
i2c_add_adapter(&dev->i2c_adap);
|
|
|
|
dev->i2c_client = em2820_client_template;
|
|
dev->i2c_client.adapter = &dev->i2c_adap;
|
|
|
|
em2820_i2c_eeprom(dev, dev->eedata, sizeof(dev->eedata));
|
|
|
|
if (i2c_scan)
|
|
do_i2c_scan(dev->name, &dev->i2c_client);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* em2820_i2c_unregister()
|
|
* unregister i2c_bus
|
|
*/
|
|
int em2820_i2c_unregister(struct em2820 *dev)
|
|
{
|
|
i2c_del_adapter(&dev->i2c_adap);
|
|
return 0;
|
|
}
|