318 lines
7.6 KiB
C
318 lines
7.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
// tm6000-i2c.c - driver for TM5600/TM6000/TM6010 USB video capture devices
|
||
|
|
//
|
||
|
|
// Copyright (c) 2006-2007 Mauro Carvalho Chehab <mchehab@kernel.org>
|
||
|
|
//
|
||
|
|
// Copyright (c) 2007 Michel Ludwig <michel.ludwig@gmail.com>
|
||
|
|
// - Fix SMBus Read Byte command
|
||
|
|
|
||
|
|
#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"
|
||
|
|
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------- */
|
||
|
|
|
||
|
|
static unsigned int i2c_debug;
|
||
|
|
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, __func__, ##args); } while (0)
|
||
|
|
|
||
|
|
static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
|
||
|
|
__u8 reg, char *buf, int len)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
unsigned int i2c_packet_limit = 16;
|
||
|
|
|
||
|
|
if (dev->dev_type == TM6010)
|
||
|
|
i2c_packet_limit = 80;
|
||
|
|
|
||
|
|
if (!buf)
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if (len < 1 || len > i2c_packet_limit) {
|
||
|
|
printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
|
||
|
|
len, i2c_packet_limit);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* capture mutex */
|
||
|
|
rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
|
||
|
|
USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
|
||
|
|
addr | reg << 8, 0, buf, len);
|
||
|
|
|
||
|
|
if (rc < 0) {
|
||
|
|
/* release mutex */
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* release mutex */
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Generic read - doesn't work fine with 16bit registers */
|
||
|
|
static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
|
||
|
|
__u8 reg, char *buf, int len)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
u8 b[2];
|
||
|
|
unsigned int i2c_packet_limit = 16;
|
||
|
|
|
||
|
|
if (dev->dev_type == TM6010)
|
||
|
|
i2c_packet_limit = 64;
|
||
|
|
|
||
|
|
if (!buf)
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if (len < 1 || len > i2c_packet_limit) {
|
||
|
|
printk(KERN_ERR "Incorrect length of i2c packet = %d, limit set to %d\n",
|
||
|
|
len, i2c_packet_limit);
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* capture mutex */
|
||
|
|
if ((dev->caps.has_zl10353) && (dev->demod_addr << 1 == addr) && (reg % 2 == 0)) {
|
||
|
|
/*
|
||
|
|
* Workaround an I2C bug when reading from zl10353
|
||
|
|
*/
|
||
|
|
reg -= 1;
|
||
|
|
len += 1;
|
||
|
|
|
||
|
|
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
||
|
|
REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, b, len);
|
||
|
|
|
||
|
|
*buf = b[1];
|
||
|
|
} else {
|
||
|
|
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
||
|
|
REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* release mutex */
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* read from a 16bit register
|
||
|
|
* for example xc2028, xc3028 or xc3028L
|
||
|
|
*/
|
||
|
|
static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
|
||
|
|
__u16 reg, char *buf, int len)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
unsigned char ureg;
|
||
|
|
|
||
|
|
if (!buf || len != 2)
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
/* capture mutex */
|
||
|
|
if (dev->dev_type == TM6010) {
|
||
|
|
ureg = reg & 0xFF;
|
||
|
|
rc = tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
|
||
|
|
USB_RECIP_DEVICE, REQ_16_SET_GET_I2C_WR1_RDN,
|
||
|
|
addr | (reg & 0xFF00), 0, &ureg, 1);
|
||
|
|
|
||
|
|
if (rc < 0) {
|
||
|
|
/* release mutex */
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
|
||
|
|
USB_RECIP_DEVICE, REQ_35_AFTEK_TUNER_READ,
|
||
|
|
reg, 0, buf, len);
|
||
|
|
} else {
|
||
|
|
rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
|
||
|
|
USB_RECIP_DEVICE, REQ_14_SET_GET_I2C_WR2_RDN,
|
||
|
|
addr, reg, buf, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* release mutex */
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
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].flags & I2C_M_RD) {
|
||
|
|
/* read request without preceding register selection */
|
||
|
|
/*
|
||
|
|
* The TM6000 only supports a read transaction
|
||
|
|
* immediately after a 1 or 2 byte write to select
|
||
|
|
* a register. We cannot fulfil this request.
|
||
|
|
*/
|
||
|
|
i2c_dprintk(2, " read without preceding write not supported");
|
||
|
|
rc = -EOPNOTSUPP;
|
||
|
|
goto err;
|
||
|
|
} else if (i + 1 < num && msgs[i].len <= 2 &&
|
||
|
|
(msgs[i + 1].flags & I2C_M_RD) &&
|
||
|
|
msgs[i].addr == msgs[i + 1].addr) {
|
||
|
|
/* 1 or 2 byte write followed by a read */
|
||
|
|
if (i2c_debug >= 2)
|
||
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
||
|
|
printk(KERN_CONT " %02x", msgs[i].buf[byte]);
|
||
|
|
i2c_dprintk(2, "; joined to read %s len=%d:",
|
||
|
|
i == num - 2 ? "stop" : "nonstop",
|
||
|
|
msgs[i + 1].len);
|
||
|
|
|
||
|
|
if (msgs[i].len == 2) {
|
||
|
|
rc = tm6000_i2c_recv_regs16(dev, addr,
|
||
|
|
msgs[i].buf[0] << 8 | msgs[i].buf[1],
|
||
|
|
msgs[i + 1].buf, msgs[i + 1].len);
|
||
|
|
} else {
|
||
|
|
rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
|
||
|
|
msgs[i + 1].buf, msgs[i + 1].len);
|
||
|
|
}
|
||
|
|
|
||
|
|
i++;
|
||
|
|
|
||
|
|
if (addr == dev->tuner_addr << 1) {
|
||
|
|
tm6000_set_reg(dev, REQ_50_SET_START, 0, 0);
|
||
|
|
tm6000_set_reg(dev, REQ_51_SET_STOP, 0, 0);
|
||
|
|
}
|
||
|
|
if (i2c_debug >= 2)
|
||
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
||
|
|
printk(KERN_CONT " %02x", msgs[i].buf[byte]);
|
||
|
|
} else {
|
||
|
|
/* write bytes */
|
||
|
|
if (i2c_debug >= 2)
|
||
|
|
for (byte = 0; byte < msgs[i].len; byte++)
|
||
|
|
printk(KERN_CONT " %02x", msgs[i].buf[byte]);
|
||
|
|
rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
|
||
|
|
msgs[i].buf + 1, msgs[i].len - 1);
|
||
|
|
}
|
||
|
|
if (i2c_debug >= 2)
|
||
|
|
printk(KERN_CONT "\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)
|
||
|
|
{
|
||
|
|
int i, rc;
|
||
|
|
unsigned char *p = dev->eedata;
|
||
|
|
unsigned char bytes[17];
|
||
|
|
|
||
|
|
dev->i2c_client.addr = 0xa0 >> 1;
|
||
|
|
dev->eedata_size = 0;
|
||
|
|
|
||
|
|
bytes[16] = '\0';
|
||
|
|
for (i = 0; i < sizeof(dev->eedata); ) {
|
||
|
|
*p = i;
|
||
|
|
rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
|
||
|
|
if (rc < 1) {
|
||
|
|
if (p == dev->eedata)
|
||
|
|
goto noeeprom;
|
||
|
|
else {
|
||
|
|
printk(KERN_WARNING
|
||
|
|
"%s: i2c eeprom read error (err=%d)\n",
|
||
|
|
dev->name, rc);
|
||
|
|
}
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
dev->eedata_size++;
|
||
|
|
p++;
|
||
|
|
if (0 == (i % 16))
|
||
|
|
printk(KERN_INFO "%s: i2c eeprom %02x:", dev->name, i);
|
||
|
|
printk(KERN_CONT " %02x", dev->eedata[i]);
|
||
|
|
if ((dev->eedata[i] >= ' ') && (dev->eedata[i] <= 'z'))
|
||
|
|
bytes[i%16] = dev->eedata[i];
|
||
|
|
else
|
||
|
|
bytes[i%16] = '.';
|
||
|
|
|
||
|
|
i++;
|
||
|
|
|
||
|
|
if (0 == (i % 16)) {
|
||
|
|
bytes[16] = '\0';
|
||
|
|
printk(KERN_CONT " %s\n", bytes);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (0 != (i%16)) {
|
||
|
|
bytes[i%16] = '\0';
|
||
|
|
for (i %= 16; i < 16; i++)
|
||
|
|
printk(KERN_CONT " ");
|
||
|
|
printk(KERN_CONT " %s\n", bytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
noeeprom:
|
||
|
|
printk(KERN_INFO "%s: Huh, no eeprom present (err=%d)?\n",
|
||
|
|
dev->name, rc);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------- */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* functionality()
|
||
|
|
*/
|
||
|
|
static u32 functionality(struct i2c_adapter *adap)
|
||
|
|
{
|
||
|
|
return I2C_FUNC_SMBUS_EMUL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct i2c_algorithm tm6000_algo = {
|
||
|
|
.master_xfer = tm6000_i2c_xfer,
|
||
|
|
.functionality = functionality,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------- */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* tm6000_i2c_register()
|
||
|
|
* register i2c bus
|
||
|
|
*/
|
||
|
|
int tm6000_i2c_register(struct tm6000_core *dev)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
dev->i2c_adap.owner = THIS_MODULE;
|
||
|
|
dev->i2c_adap.algo = &tm6000_algo;
|
||
|
|
dev->i2c_adap.dev.parent = &dev->udev->dev;
|
||
|
|
strlcpy(dev->i2c_adap.name, dev->name, sizeof(dev->i2c_adap.name));
|
||
|
|
dev->i2c_adap.algo_data = dev;
|
||
|
|
i2c_set_adapdata(&dev->i2c_adap, &dev->v4l2_dev);
|
||
|
|
rc = i2c_add_adapter(&dev->i2c_adap);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
dev->i2c_client.adapter = &dev->i2c_adap;
|
||
|
|
strlcpy(dev->i2c_client.name, "tm6000 internal", I2C_NAME_SIZE);
|
||
|
|
tm6000_i2c_eeprom(dev);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* tm6000_i2c_unregister()
|
||
|
|
* unregister i2c_bus
|
||
|
|
*/
|
||
|
|
int tm6000_i2c_unregister(struct tm6000_core *dev)
|
||
|
|
{
|
||
|
|
i2c_del_adapter(&dev->i2c_adap);
|
||
|
|
return 0;
|
||
|
|
}
|