/*
tm6000-i2c.c - driver for TM5600/TM6000 USB video capture devices
Copyright (C) 2006-2007 Mauro Carvalho Chehab <mchehab@infradead.org>
Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
- Fix SMBus Read Byte command
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 version 2
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 "tm6000.h"
#include "tm6000-regs.h"
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include "tuner-xc2028.h"
/*FIXME: Hack to avoid needing to patch i2c-id.h */
#define I2C_HW_B_TM6000 I2C_HW_B_EM28XX
/* ----------------------------------------------------------- */
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 i2c_dprintk(lvl,fmt, args...) if (i2c_debug>=lvl) do{ \
printk(KERN_DEBUG "%s at %s: " fmt, \
dev->name, __FUNCTION__ , ##args); } while (0)
/* Returns 0 if address is found */
static int tm6000_i2c_scan(struct i2c_adapter *i2c_adap, int addr)
{
struct tm6000_core *dev = i2c_adap->algo_data;
#if 1
/* HACK: i2c scan is not working yet */
if (
(dev->caps.has_tuner && (addr==dev->tuner_addr)) ||
(dev->caps.has_tda9874 && (addr==0xb0)) ||
(dev->caps.has_eeprom && (addr==0xa0))
) {
printk("Hack: enabling device at addr 0x%02x\n",addr);
return (1);
} else {
return -ENODEV;
}
#else
int rc=-ENODEV;
char buf[1];
/* This sends addr + 1 byte with 0 */
rc = tm6000_read_write_usb (dev,
USB_DIR_IN | USB_TYPE_VENDOR,
REQ_16_SET_GET_I2CSEQ,
addr, 0,
buf, 0);
msleep(10);
if (rc<0) {
if (i2c_debug>=2)
printk("no device at addr 0x%02x\n",addr);
}
printk("Hack: check on addr 0x%02x returned %d\n",addr,rc);
return rc;
#endif
}
static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msgs[], int num)
{
struct tm6000_core *dev = i2c_adap->algo_data;
int addr, rc, i, byte;
u8 prev_reg = 0;
if (num <= 0)
return 0;
for (i = 0; i < num; i++) {
addr = (msgs[i].addr << 1) &0xff;
i2c_dprintk(2,"%s %s addr=0x%x len=%d:",
(msgs[i].flags & I2C_M_RD) ? "read" : "write",
i == num - 1 ? "stop" : "nonstop", addr, msgs[i].len);
if (!msgs[i].len) {
/* Do I2C scan */
rc=tm6000_i2c_scan(i2c_adap, addr);
} else if (msgs[i].flags & I2C_M_RD) {
/* Read bytes */
/* I2C is assumed to have always a subaddr at the first byte of the
message bus. Also, the first i2c value of the answer is returned
out of message data.
*/
/* SMBus Read Byte command */
rc = tm6000_read_write_usb (dev,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
REQ_16_SET_GET_I2CSEQ,
addr | (prev_reg << 8), 0,
msgs[i].buf, msgs[i].len);
if (i2c_debug>=2) {
for (byte = 0; byte < msgs[i].len; byte++) {
printk(" %02x", msgs[i].buf[byte]);
}
}
} else {
/* write bytes */
if (i2c_debug>=2) {
for (byte = 0; byte < msgs[i].len; byte++)
printk(" %02x", msgs[i].buf[byte]);
}
/* SMBus Write Byte command followed by a read command */
if(msgs[i].len == 1 && i+1 < num && msgs[i+1].flags & I2C_M_RD
&& msgs[i+1].addr == msgs[i].addr) {
prev_reg = msgs[i].buf[0];
continue;
}
rc = tm6000_read_write_usb (dev,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
REQ_16_SET_GET_I2CSEQ,
addr|(*msgs[i].buf)<<8, 0,
msgs[i].buf+1, msgs[i].len-1);
if(msgs[i].len >= 1) {
prev_reg = msgs[i].buf[0];
}
else {
prev_reg = 0;
}
}
if (i2c_debug>=2)
printk("\n");
if (rc < 0)
goto err;
}
return num;
err:
i2c_dprintk(2," ERROR: %i\n", rc);
return rc;
}
static int tm6000_i2c_eeprom(struct tm6000_core *dev,
unsigned char *eedata, int len)
{
int i, rc;
unsigned char *p = eedata;
unsigned char bytes[17];
dev->i2c_client.addr = 0xa0 >> 1;
bytes[16] = '\0';
for (i = 0; i < len; ) {
*p = i;
rc = tm6000_read_write_usb (dev,
USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
REQ_16_SET_GET_I2CSEQ, 0xa0 | i<<8, 0, p, 1);
if (rc < 1) {
if (p == eedata)
goto noeeprom;
else {
printk(KERN_WARNING
"%s: i2c eeprom read error (err=%d)\n",
dev->name, rc);
}
return -1;
}
p++;
if (0 == (i % 16))
printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
printk(" %02x", eedata[i]);
if ((eedata[i] >= ' ') && (eedata[i] <= 'z')) {
bytes[i%16] = eedata[i];
} else {
bytes[i%16]='.';
}
i++;
if (0 == (i % 16)) {
bytes[16] = '\0';
printk(" %s\n", bytes);
}
}
if (0 != (i%16)) {
bytes[i%16] = '\0';
for (i %= 16; i < 16; i++)
printk(" ");
}
printk(" %s\n", bytes);
return 0;
noeeprom:
printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
dev->name, rc);
return rc;
}
/* ----------------------------------------------------------- */
/*
* 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
#define mass_write(addr, reg, data...) \
{ const static u8 _val[] = data; \
rc=tm6000_read_write_usb(dev,USB_DIR_OUT | USB_TYPE_VENDOR, \
REQ_16_SET_GET_I2CSEQ,(reg<<8)+addr, 0x00, (u8 *) _val, \
ARRAY_SIZE(_val)); \
if (rc<0) { \
printk(KERN_ERR "Error on line %d: %d\n",__LINE__,rc); \
return rc; \
} \
msleep (10); \
}
/* Tuner callback to provide the proper gpio changes needed for xc2028 */
static int tm6000_tuner_callback(void *ptr, int command, int arg)
{
int rc=0;
struct tm6000_core *dev = ptr;
if (dev->tuner_type!=TUNER_XC2028)
return 0;
switch (command) {
case XC2028_RESET_CLK:
tm6000_set_reg (dev, REQ_04_EN_DISABLE_MCU_INT,
0x02, arg);
msleep(10);
rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
TM6000_GPIO_CLK, 0);
if (rc<0)
return rc;
msleep(10);
rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
TM6000_GPIO_CLK, 1);
break;
case XC2028_TUNER_RESET:
/* Reset codes during load firmware */
switch (arg) {
case 0:
tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
dev->tuner_reset_gpio, 0x00);
msleep(130);
tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
dev->tuner_reset_gpio, 0x01);
msleep(130);
break;
case 1:
tm6000_set_reg (dev, REQ_04_EN_DISABLE_MCU_INT,
0x02, 0x01);
msleep(10);
break;
case 2:
rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
TM6000_GPIO_CLK, 0);
if (rc<0)
return rc;
msleep(100);
rc=tm6000_set_reg (dev, REQ_03_SET_GET_MCU_PIN,
TM6000_GPIO_CLK, 1);
msleep(100);
break;
}
}
return (rc);
}
static int attach_inform(struct i2c_client *client)
{
struct tm6000_core *dev = client->adapter->algo_data;
struct tuner_setup tun_setup;
i2c_dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
client->driver->driver.name, client->addr, client->name);
switch (client->addr<<1) {
case 0xb0:
request_module("tvaudio");
return 0;
}
/* If tuner, initialize the tuner part */
if ( dev->tuner_addr != client->addr<<1 ) {
return 0;
}
memset (&tun_setup, 0, sizeof(tun_setup));
tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
tun_setup.type = dev->tuner_type;
tun_setup.addr = dev->tuner_addr>>1;
tun_setup.tuner_callback = tm6000_tuner_callback;
client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
return 0;
}
static struct i2c_algorithm tm6000_algo = {
.master_xfer = tm6000_i2c_xfer,
.algo_control = algo_control,
.functionality = functionality,
};
static struct i2c_adapter tm6000_adap_template = {
#ifdef I2C_PEC
.owner = THIS_MODULE,
#else
.inc_use = inc_use,
.dec_use = dec_use,
#endif
.class = I2C_CLASS_TV_ANALOG,
.name = "tm6000",
.id = I2C_HW_B_TM6000,
.algo = &tm6000_algo,
.client_register = attach_inform,
};
static struct i2c_client tm6000_client_template = {
.name = "tm6000 internal",
};
/* ----------------------------------------------------------- */
/*
* i2c_devs
* incomplete list of known devices
*/
static char *i2c_devs[128] = {
[0xc2 >> 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 i2c device @ 0x%x [%s]\n", name,
i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
}
}
/*
* tm6000_i2c_call_clients()
* send commands to all attached i2c devices
*/
void tm6000_i2c_call_clients(struct tm6000_core *dev, unsigned int cmd, void *arg)
{
BUG_ON(NULL == dev->i2c_adap.algo_data);
i2c_clients_command(&dev->i2c_adap, cmd, arg);
}
/*
* tm6000_i2c_register()
* register i2c bus
*/
int tm6000_i2c_register(struct tm6000_core *dev)
{
unsigned char eedata[256];
dev->i2c_adap = tm6000_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 = tm6000_client_template;
dev->i2c_client.adapter = &dev->i2c_adap;
if (i2c_scan)
do_i2c_scan(dev->name, &dev->i2c_client);
tm6000_i2c_eeprom(dev, eedata, sizeof(eedata));
return 0;
}
/*
* tm6000_i2c_unregister()
* unregister i2c_bus
*/
int tm6000_i2c_unregister(struct tm6000_core *dev)
{
i2c_del_adapter(&dev->i2c_adap);
return 0;
}
