mirror of https://gitee.com/openkylin/linux.git
529 lines
13 KiB
C
529 lines
13 KiB
C
/*
|
|
cx231xx-i2c.c - driver for Conexant Cx23100/101/102 USB video capture devices
|
|
|
|
Copyright (C) 2008 <srinivasa.deevi at conexant dot com>
|
|
Based on em28xx driver
|
|
Based on Cx23885 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.
|
|
|
|
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/v4l2-common.h>
|
|
#include <media/tuner.h>
|
|
|
|
#include "cx231xx.h"
|
|
|
|
/* ----------------------------------------------------------- */
|
|
|
|
static unsigned int i2c_scan;
|
|
module_param(i2c_scan, int, 0444);
|
|
MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
|
|
|
|
static unsigned int i2c_debug;
|
|
module_param(i2c_debug, int, 0644);
|
|
MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
|
|
|
|
#define dprintk1(lvl, fmt, args...) \
|
|
do { \
|
|
if (i2c_debug >= lvl) { \
|
|
printk(fmt, ##args); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define dprintk2(lvl, fmt, args...) \
|
|
do { \
|
|
if (i2c_debug >= lvl) { \
|
|
printk(KERN_DEBUG "%s at %s: " fmt, \
|
|
dev->name, __func__ , ##args); \
|
|
} \
|
|
} while (0)
|
|
|
|
/*
|
|
* cx231xx_i2c_send_bytes()
|
|
*/
|
|
int cx231xx_i2c_send_bytes(struct i2c_adapter *i2c_adap,
|
|
const struct i2c_msg *msg)
|
|
{
|
|
struct cx231xx_i2c *bus = i2c_adap->algo_data;
|
|
struct cx231xx *dev = bus->dev;
|
|
struct cx231xx_i2c_xfer_data req_data;
|
|
int status = 0;
|
|
u16 size = 0;
|
|
u8 loop = 0;
|
|
u8 saddr_len = 1;
|
|
u8 *buf_ptr = NULL;
|
|
u16 saddr = 0;
|
|
u8 need_gpio = 0;
|
|
|
|
if ((bus->nr == 1) && (msg->addr == 0x61)
|
|
&& (dev->tuner_type == TUNER_XC5000)) {
|
|
|
|
size = msg->len;
|
|
|
|
if (size == 2) { /* register write sub addr */
|
|
/* Just writing sub address will cause problem
|
|
* to XC5000. So ignore the request */
|
|
return 0;
|
|
} else if (size == 4) { /* register write with sub addr */
|
|
if (msg->len >= 2)
|
|
saddr = msg->buf[0] << 8 | msg->buf[1];
|
|
else if (msg->len == 1)
|
|
saddr = msg->buf[0];
|
|
|
|
switch (saddr) {
|
|
case 0x0000: /* start tuner calibration mode */
|
|
need_gpio = 1;
|
|
/* FW Loading is done */
|
|
dev->xc_fw_load_done = 1;
|
|
break;
|
|
case 0x000D: /* Set signal source */
|
|
case 0x0001: /* Set TV standard - Video */
|
|
case 0x0002: /* Set TV standard - Audio */
|
|
case 0x0003: /* Set RF Frequency */
|
|
need_gpio = 1;
|
|
break;
|
|
default:
|
|
if (dev->xc_fw_load_done)
|
|
need_gpio = 1;
|
|
break;
|
|
}
|
|
|
|
if (need_gpio) {
|
|
dprintk1(1,
|
|
"GPIO WRITE: addr 0x%x, len %d, saddr 0x%x\n",
|
|
msg->addr, msg->len, saddr);
|
|
|
|
return dev->cx231xx_gpio_i2c_write(dev,
|
|
msg->addr,
|
|
msg->buf,
|
|
msg->len);
|
|
}
|
|
}
|
|
|
|
/* special case for Xc5000 tuner case */
|
|
saddr_len = 1;
|
|
|
|
/* adjust the length to correct length */
|
|
size -= saddr_len;
|
|
buf_ptr = (u8 *) (msg->buf + 1);
|
|
|
|
do {
|
|
/* prepare xfer_data struct */
|
|
req_data.dev_addr = msg->addr;
|
|
req_data.direction = msg->flags;
|
|
req_data.saddr_len = saddr_len;
|
|
req_data.saddr_dat = msg->buf[0];
|
|
req_data.buf_size = size > 16 ? 16 : size;
|
|
req_data.p_buffer = (u8 *) (buf_ptr + loop * 16);
|
|
|
|
bus->i2c_nostop = (size > 16) ? 1 : 0;
|
|
bus->i2c_reserve = (loop == 0) ? 0 : 1;
|
|
|
|
/* usb send command */
|
|
status = dev->cx231xx_send_usb_command(bus, &req_data);
|
|
loop++;
|
|
|
|
if (size >= 16)
|
|
size -= 16;
|
|
else
|
|
size = 0;
|
|
|
|
} while (size > 0);
|
|
|
|
bus->i2c_nostop = 0;
|
|
bus->i2c_reserve = 0;
|
|
|
|
} else { /* regular case */
|
|
|
|
/* prepare xfer_data struct */
|
|
req_data.dev_addr = msg->addr;
|
|
req_data.direction = msg->flags;
|
|
req_data.saddr_len = 0;
|
|
req_data.saddr_dat = 0;
|
|
req_data.buf_size = msg->len;
|
|
req_data.p_buffer = msg->buf;
|
|
|
|
/* usb send command */
|
|
status = dev->cx231xx_send_usb_command(bus, &req_data);
|
|
}
|
|
|
|
return status < 0 ? status : 0;
|
|
}
|
|
|
|
/*
|
|
* cx231xx_i2c_recv_bytes()
|
|
* read a byte from the i2c device
|
|
*/
|
|
static int cx231xx_i2c_recv_bytes(struct i2c_adapter *i2c_adap,
|
|
const struct i2c_msg *msg)
|
|
{
|
|
struct cx231xx_i2c *bus = i2c_adap->algo_data;
|
|
struct cx231xx *dev = bus->dev;
|
|
struct cx231xx_i2c_xfer_data req_data;
|
|
int status = 0;
|
|
u16 saddr = 0;
|
|
u8 need_gpio = 0;
|
|
|
|
if ((bus->nr == 1) && (msg->addr == 0x61)
|
|
&& dev->tuner_type == TUNER_XC5000) {
|
|
|
|
if (msg->len == 2)
|
|
saddr = msg->buf[0] << 8 | msg->buf[1];
|
|
else if (msg->len == 1)
|
|
saddr = msg->buf[0];
|
|
|
|
if (dev->xc_fw_load_done) {
|
|
|
|
switch (saddr) {
|
|
case 0x0009: /* BUSY check */
|
|
dprintk1(1,
|
|
"GPIO R E A D: Special case BUSY check \n");
|
|
/*Try read BUSY register, just set it to zero*/
|
|
msg->buf[0] = 0;
|
|
if (msg->len == 2)
|
|
msg->buf[1] = 0;
|
|
return 0;
|
|
case 0x0004: /* read Lock status */
|
|
need_gpio = 1;
|
|
break;
|
|
|
|
}
|
|
|
|
if (need_gpio) {
|
|
/* this is a special case to handle Xceive tuner
|
|
clock stretch issue with gpio based I2C */
|
|
|
|
dprintk1(1,
|
|
"GPIO R E A D: addr 0x%x, len %d, saddr 0x%x\n",
|
|
msg->addr, msg->len,
|
|
msg->buf[0] << 8 | msg->buf[1]);
|
|
|
|
status =
|
|
dev->cx231xx_gpio_i2c_write(dev, msg->addr,
|
|
msg->buf,
|
|
msg->len);
|
|
status =
|
|
dev->cx231xx_gpio_i2c_read(dev, msg->addr,
|
|
msg->buf,
|
|
msg->len);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
/* prepare xfer_data struct */
|
|
req_data.dev_addr = msg->addr;
|
|
req_data.direction = msg->flags;
|
|
req_data.saddr_len = msg->len;
|
|
req_data.saddr_dat = msg->buf[0] << 8 | msg->buf[1];
|
|
req_data.buf_size = msg->len;
|
|
req_data.p_buffer = msg->buf;
|
|
|
|
/* usb send command */
|
|
status = dev->cx231xx_send_usb_command(bus, &req_data);
|
|
|
|
} else {
|
|
|
|
/* prepare xfer_data struct */
|
|
req_data.dev_addr = msg->addr;
|
|
req_data.direction = msg->flags;
|
|
req_data.saddr_len = 0;
|
|
req_data.saddr_dat = 0;
|
|
req_data.buf_size = msg->len;
|
|
req_data.p_buffer = msg->buf;
|
|
|
|
/* usb send command */
|
|
status = dev->cx231xx_send_usb_command(bus, &req_data);
|
|
}
|
|
|
|
return status < 0 ? status : 0;
|
|
}
|
|
|
|
/*
|
|
* cx231xx_i2c_recv_bytes_with_saddr()
|
|
* read a byte from the i2c device
|
|
*/
|
|
static int cx231xx_i2c_recv_bytes_with_saddr(struct i2c_adapter *i2c_adap,
|
|
const struct i2c_msg *msg1,
|
|
const struct i2c_msg *msg2)
|
|
{
|
|
struct cx231xx_i2c *bus = i2c_adap->algo_data;
|
|
struct cx231xx *dev = bus->dev;
|
|
struct cx231xx_i2c_xfer_data req_data;
|
|
int status = 0;
|
|
u16 saddr = 0;
|
|
u8 need_gpio = 0;
|
|
|
|
if (msg1->len == 2)
|
|
saddr = msg1->buf[0] << 8 | msg1->buf[1];
|
|
else if (msg1->len == 1)
|
|
saddr = msg1->buf[0];
|
|
|
|
if ((bus->nr == 1) && (msg2->addr == 0x61)
|
|
&& dev->tuner_type == TUNER_XC5000) {
|
|
|
|
if ((msg2->len < 16)) {
|
|
|
|
dprintk1(1,
|
|
"i2c_read: addr 0x%x, len %d, saddr 0x%x, len %d\n",
|
|
msg2->addr, msg2->len, saddr, msg1->len);
|
|
|
|
switch (saddr) {
|
|
case 0x0008: /* read FW load status */
|
|
need_gpio = 1;
|
|
break;
|
|
case 0x0004: /* read Lock status */
|
|
need_gpio = 1;
|
|
break;
|
|
}
|
|
|
|
if (need_gpio) {
|
|
status =
|
|
dev->cx231xx_gpio_i2c_write(dev, msg1->addr,
|
|
msg1->buf,
|
|
msg1->len);
|
|
status =
|
|
dev->cx231xx_gpio_i2c_read(dev, msg2->addr,
|
|
msg2->buf,
|
|
msg2->len);
|
|
return status;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* prepare xfer_data struct */
|
|
req_data.dev_addr = msg2->addr;
|
|
req_data.direction = msg2->flags;
|
|
req_data.saddr_len = msg1->len;
|
|
req_data.saddr_dat = saddr;
|
|
req_data.buf_size = msg2->len;
|
|
req_data.p_buffer = msg2->buf;
|
|
|
|
/* usb send command */
|
|
status = dev->cx231xx_send_usb_command(bus, &req_data);
|
|
|
|
return status < 0 ? status : 0;
|
|
}
|
|
|
|
/*
|
|
* cx231xx_i2c_check_for_device()
|
|
* check if there is a i2c_device at the supplied address
|
|
*/
|
|
static int cx231xx_i2c_check_for_device(struct i2c_adapter *i2c_adap,
|
|
const struct i2c_msg *msg)
|
|
{
|
|
struct cx231xx_i2c *bus = i2c_adap->algo_data;
|
|
struct cx231xx *dev = bus->dev;
|
|
struct cx231xx_i2c_xfer_data req_data;
|
|
int status = 0;
|
|
|
|
/* prepare xfer_data struct */
|
|
req_data.dev_addr = msg->addr;
|
|
req_data.direction = msg->flags;
|
|
req_data.saddr_len = 0;
|
|
req_data.saddr_dat = 0;
|
|
req_data.buf_size = 0;
|
|
req_data.p_buffer = NULL;
|
|
|
|
/* usb send command */
|
|
status = dev->cx231xx_send_usb_command(bus, &req_data);
|
|
|
|
return status < 0 ? status : 0;
|
|
}
|
|
|
|
/*
|
|
* cx231xx_i2c_xfer()
|
|
* the main i2c transfer function
|
|
*/
|
|
static int cx231xx_i2c_xfer(struct i2c_adapter *i2c_adap,
|
|
struct i2c_msg msgs[], int num)
|
|
{
|
|
struct cx231xx_i2c *bus = i2c_adap->algo_data;
|
|
struct cx231xx *dev = bus->dev;
|
|
int addr, rc, i, byte;
|
|
|
|
if (num <= 0)
|
|
return 0;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
|
|
addr = msgs[i].addr >> 1;
|
|
|
|
dprintk2(2, "%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 = cx231xx_i2c_check_for_device(i2c_adap, &msgs[i]);
|
|
if (rc < 0) {
|
|
dprintk2(2, " no device\n");
|
|
return rc;
|
|
}
|
|
|
|
} else if (msgs[i].flags & I2C_M_RD) {
|
|
/* read bytes */
|
|
rc = cx231xx_i2c_recv_bytes(i2c_adap, &msgs[i]);
|
|
if (i2c_debug >= 2) {
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
|
printk(" %02x", msgs[i].buf[byte]);
|
|
}
|
|
} else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
|
|
msgs[i].addr == msgs[i + 1].addr
|
|
&& (msgs[i].len <= 2) && (bus->nr < 2)) {
|
|
/* read bytes */
|
|
rc = cx231xx_i2c_recv_bytes_with_saddr(i2c_adap,
|
|
&msgs[i],
|
|
&msgs[i + 1]);
|
|
if (i2c_debug >= 2) {
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
|
printk(" %02x", msgs[i].buf[byte]);
|
|
}
|
|
i++;
|
|
} else {
|
|
/* write bytes */
|
|
if (i2c_debug >= 2) {
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
|
printk(" %02x", msgs[i].buf[byte]);
|
|
}
|
|
rc = cx231xx_i2c_send_bytes(i2c_adap, &msgs[i]);
|
|
}
|
|
if (rc < 0)
|
|
goto err;
|
|
if (i2c_debug >= 2)
|
|
printk("\n");
|
|
}
|
|
|
|
return num;
|
|
err:
|
|
dprintk2(2, " ERROR: %i\n", rc);
|
|
return rc;
|
|
}
|
|
|
|
/* ----------------------------------------------------------- */
|
|
|
|
/*
|
|
* functionality()
|
|
*/
|
|
static u32 functionality(struct i2c_adapter *adap)
|
|
{
|
|
return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
|
|
}
|
|
|
|
static struct i2c_algorithm cx231xx_algo = {
|
|
.master_xfer = cx231xx_i2c_xfer,
|
|
.functionality = functionality,
|
|
};
|
|
|
|
static struct i2c_adapter cx231xx_adap_template = {
|
|
.owner = THIS_MODULE,
|
|
.name = "cx231xx",
|
|
.algo = &cx231xx_algo,
|
|
};
|
|
|
|
static struct i2c_client cx231xx_client_template = {
|
|
.name = "cx231xx internal",
|
|
};
|
|
|
|
/* ----------------------------------------------------------- */
|
|
|
|
/*
|
|
* i2c_devs
|
|
* incomplete list of known devices
|
|
*/
|
|
static char *i2c_devs[128] = {
|
|
[0x60 >> 1] = "colibri",
|
|
[0x88 >> 1] = "hammerhead",
|
|
[0x8e >> 1] = "CIR",
|
|
[0x32 >> 1] = "GeminiIII",
|
|
[0x02 >> 1] = "Aquarius",
|
|
[0xa0 >> 1] = "eeprom",
|
|
[0xc0 >> 1] = "tuner/XC3028",
|
|
[0xc2 >> 1] = "tuner/XC5000",
|
|
};
|
|
|
|
/*
|
|
* cx231xx_do_i2c_scan()
|
|
* check i2c address range for devices
|
|
*/
|
|
void cx231xx_do_i2c_scan(struct cx231xx *dev, struct i2c_client *c)
|
|
{
|
|
unsigned char buf;
|
|
int i, rc;
|
|
|
|
cx231xx_info(": Checking for I2C devices ..\n");
|
|
for (i = 0; i < 128; i++) {
|
|
c->addr = i;
|
|
rc = i2c_master_recv(c, &buf, 0);
|
|
if (rc < 0)
|
|
continue;
|
|
cx231xx_info("%s: i2c scan: found device @ 0x%x [%s]\n",
|
|
dev->name, i << 1,
|
|
i2c_devs[i] ? i2c_devs[i] : "???");
|
|
}
|
|
cx231xx_info(": Completed Checking for I2C devices.\n");
|
|
}
|
|
|
|
/*
|
|
* cx231xx_i2c_register()
|
|
* register i2c bus
|
|
*/
|
|
int cx231xx_i2c_register(struct cx231xx_i2c *bus)
|
|
{
|
|
struct cx231xx *dev = bus->dev;
|
|
|
|
BUG_ON(!dev->cx231xx_send_usb_command);
|
|
|
|
memcpy(&bus->i2c_adap, &cx231xx_adap_template, sizeof(bus->i2c_adap));
|
|
memcpy(&bus->i2c_algo, &cx231xx_algo, sizeof(bus->i2c_algo));
|
|
memcpy(&bus->i2c_client, &cx231xx_client_template,
|
|
sizeof(bus->i2c_client));
|
|
|
|
bus->i2c_adap.dev.parent = &dev->udev->dev;
|
|
|
|
strlcpy(bus->i2c_adap.name, bus->dev->name, sizeof(bus->i2c_adap.name));
|
|
|
|
bus->i2c_algo.data = bus;
|
|
bus->i2c_adap.algo_data = bus;
|
|
i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev);
|
|
i2c_add_adapter(&bus->i2c_adap);
|
|
|
|
bus->i2c_client.adapter = &bus->i2c_adap;
|
|
|
|
if (0 == bus->i2c_rc) {
|
|
if (i2c_scan)
|
|
cx231xx_do_i2c_scan(dev, &bus->i2c_client);
|
|
|
|
/* Instantiate the IR receiver device, if present */
|
|
cx231xx_register_i2c_ir(dev);
|
|
} else
|
|
cx231xx_warn("%s: i2c bus %d register FAILED\n",
|
|
dev->name, bus->nr);
|
|
|
|
return bus->i2c_rc;
|
|
}
|
|
|
|
/*
|
|
* cx231xx_i2c_unregister()
|
|
* unregister i2c_bus
|
|
*/
|
|
int cx231xx_i2c_unregister(struct cx231xx_i2c *bus)
|
|
{
|
|
i2c_del_adapter(&bus->i2c_adap);
|
|
return 0;
|
|
}
|