375 lines
8.6 KiB
C
375 lines
8.6 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Driver for the Conexant CX23885 PCIe bridge
|
||
|
|
*
|
||
|
|
* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "cx23885.h"
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#include <media/v4l2-common.h>
|
||
|
|
|
||
|
|
static unsigned int i2c_debug;
|
||
|
|
module_param(i2c_debug, int, 0644);
|
||
|
|
MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
|
||
|
|
|
||
|
|
static unsigned int i2c_scan;
|
||
|
|
module_param(i2c_scan, int, 0444);
|
||
|
|
MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
|
||
|
|
|
||
|
|
#define dprintk(level, fmt, arg...)\
|
||
|
|
do { if (i2c_debug >= level)\
|
||
|
|
printk(KERN_DEBUG pr_fmt("%s: i2c:" fmt), \
|
||
|
|
__func__, ##arg); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define I2C_WAIT_DELAY 32
|
||
|
|
#define I2C_WAIT_RETRY 64
|
||
|
|
|
||
|
|
#define I2C_EXTEND (1 << 3)
|
||
|
|
#define I2C_NOSTOP (1 << 4)
|
||
|
|
|
||
|
|
static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap)
|
||
|
|
{
|
||
|
|
struct cx23885_i2c *bus = i2c_adap->algo_data;
|
||
|
|
struct cx23885_dev *dev = bus->dev;
|
||
|
|
return cx_read(bus->reg_stat) & 0x01;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
|
||
|
|
{
|
||
|
|
struct cx23885_i2c *bus = i2c_adap->algo_data;
|
||
|
|
struct cx23885_dev *dev = bus->dev;
|
||
|
|
return cx_read(bus->reg_stat) & 0x02 ? 1 : 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int i2c_wait_done(struct i2c_adapter *i2c_adap)
|
||
|
|
{
|
||
|
|
int count;
|
||
|
|
|
||
|
|
for (count = 0; count < I2C_WAIT_RETRY; count++) {
|
||
|
|
if (!i2c_is_busy(i2c_adap))
|
||
|
|
break;
|
||
|
|
udelay(I2C_WAIT_DELAY);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (I2C_WAIT_RETRY == count)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
|
||
|
|
const struct i2c_msg *msg, int joined_rlen)
|
||
|
|
{
|
||
|
|
struct cx23885_i2c *bus = i2c_adap->algo_data;
|
||
|
|
struct cx23885_dev *dev = bus->dev;
|
||
|
|
u32 wdata, addr, ctrl;
|
||
|
|
int retval, cnt;
|
||
|
|
|
||
|
|
if (joined_rlen)
|
||
|
|
dprintk(1, "%s(msg->wlen=%d, nextmsg->rlen=%d)\n", __func__,
|
||
|
|
msg->len, joined_rlen);
|
||
|
|
else
|
||
|
|
dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);
|
||
|
|
|
||
|
|
/* Deal with i2c probe functions with zero payload */
|
||
|
|
if (msg->len == 0) {
|
||
|
|
cx_write(bus->reg_addr, msg->addr << 25);
|
||
|
|
cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2));
|
||
|
|
if (!i2c_wait_done(i2c_adap))
|
||
|
|
return -EIO;
|
||
|
|
if (!i2c_slave_did_ack(i2c_adap))
|
||
|
|
return -ENXIO;
|
||
|
|
|
||
|
|
dprintk(1, "%s() returns 0\n", __func__);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* dev, reg + first byte */
|
||
|
|
addr = (msg->addr << 25) | msg->buf[0];
|
||
|
|
wdata = msg->buf[0];
|
||
|
|
ctrl = bus->i2c_period | (1 << 12) | (1 << 2);
|
||
|
|
|
||
|
|
if (msg->len > 1)
|
||
|
|
ctrl |= I2C_NOSTOP | I2C_EXTEND;
|
||
|
|
else if (joined_rlen)
|
||
|
|
ctrl |= I2C_NOSTOP;
|
||
|
|
|
||
|
|
cx_write(bus->reg_addr, addr);
|
||
|
|
cx_write(bus->reg_wdata, wdata);
|
||
|
|
cx_write(bus->reg_ctrl, ctrl);
|
||
|
|
|
||
|
|
if (!i2c_wait_done(i2c_adap))
|
||
|
|
goto eio;
|
||
|
|
if (i2c_debug) {
|
||
|
|
printk(KERN_DEBUG " <W %02x %02x", msg->addr << 1, msg->buf[0]);
|
||
|
|
if (!(ctrl & I2C_NOSTOP))
|
||
|
|
pr_cont(" >\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
for (cnt = 1; cnt < msg->len; cnt++) {
|
||
|
|
/* following bytes */
|
||
|
|
wdata = msg->buf[cnt];
|
||
|
|
ctrl = bus->i2c_period | (1 << 12) | (1 << 2);
|
||
|
|
|
||
|
|
if (cnt < msg->len - 1)
|
||
|
|
ctrl |= I2C_NOSTOP | I2C_EXTEND;
|
||
|
|
else if (joined_rlen)
|
||
|
|
ctrl |= I2C_NOSTOP;
|
||
|
|
|
||
|
|
cx_write(bus->reg_addr, addr);
|
||
|
|
cx_write(bus->reg_wdata, wdata);
|
||
|
|
cx_write(bus->reg_ctrl, ctrl);
|
||
|
|
|
||
|
|
if (!i2c_wait_done(i2c_adap))
|
||
|
|
goto eio;
|
||
|
|
if (i2c_debug) {
|
||
|
|
pr_cont(" %02x", msg->buf[cnt]);
|
||
|
|
if (!(ctrl & I2C_NOSTOP))
|
||
|
|
pr_cont(" >\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return msg->len;
|
||
|
|
|
||
|
|
eio:
|
||
|
|
retval = -EIO;
|
||
|
|
if (i2c_debug)
|
||
|
|
pr_err(" ERR: %d\n", retval);
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int i2c_readbytes(struct i2c_adapter *i2c_adap,
|
||
|
|
const struct i2c_msg *msg, int joined)
|
||
|
|
{
|
||
|
|
struct cx23885_i2c *bus = i2c_adap->algo_data;
|
||
|
|
struct cx23885_dev *dev = bus->dev;
|
||
|
|
u32 ctrl, cnt;
|
||
|
|
int retval;
|
||
|
|
|
||
|
|
|
||
|
|
if (i2c_debug && !joined)
|
||
|
|
dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);
|
||
|
|
|
||
|
|
/* Deal with i2c probe functions with zero payload */
|
||
|
|
if (msg->len == 0) {
|
||
|
|
cx_write(bus->reg_addr, msg->addr << 25);
|
||
|
|
cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2) | 1);
|
||
|
|
if (!i2c_wait_done(i2c_adap))
|
||
|
|
return -EIO;
|
||
|
|
if (!i2c_slave_did_ack(i2c_adap))
|
||
|
|
return -ENXIO;
|
||
|
|
|
||
|
|
|
||
|
|
dprintk(1, "%s() returns 0\n", __func__);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (i2c_debug) {
|
||
|
|
if (joined)
|
||
|
|
dprintk(1, " R");
|
||
|
|
else
|
||
|
|
dprintk(1, " <R %02x", (msg->addr << 1) + 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
for (cnt = 0; cnt < msg->len; cnt++) {
|
||
|
|
|
||
|
|
ctrl = bus->i2c_period | (1 << 12) | (1 << 2) | 1;
|
||
|
|
|
||
|
|
if (cnt < msg->len - 1)
|
||
|
|
ctrl |= I2C_NOSTOP | I2C_EXTEND;
|
||
|
|
|
||
|
|
cx_write(bus->reg_addr, msg->addr << 25);
|
||
|
|
cx_write(bus->reg_ctrl, ctrl);
|
||
|
|
|
||
|
|
if (!i2c_wait_done(i2c_adap))
|
||
|
|
goto eio;
|
||
|
|
msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff;
|
||
|
|
if (i2c_debug) {
|
||
|
|
dprintk(1, " %02x", msg->buf[cnt]);
|
||
|
|
if (!(ctrl & I2C_NOSTOP))
|
||
|
|
dprintk(1, " >\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return msg->len;
|
||
|
|
|
||
|
|
eio:
|
||
|
|
retval = -EIO;
|
||
|
|
if (i2c_debug)
|
||
|
|
pr_err(" ERR: %d\n", retval);
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int i2c_xfer(struct i2c_adapter *i2c_adap,
|
||
|
|
struct i2c_msg *msgs, int num)
|
||
|
|
{
|
||
|
|
int i, retval = 0;
|
||
|
|
|
||
|
|
dprintk(1, "%s(num = %d)\n", __func__, num);
|
||
|
|
|
||
|
|
for (i = 0 ; i < num; i++) {
|
||
|
|
dprintk(1, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
|
||
|
|
__func__, num, msgs[i].addr, msgs[i].len);
|
||
|
|
if (msgs[i].flags & I2C_M_RD) {
|
||
|
|
/* read */
|
||
|
|
retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
|
||
|
|
} else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
|
||
|
|
msgs[i].addr == msgs[i + 1].addr) {
|
||
|
|
/* write then read from same address */
|
||
|
|
retval = i2c_sendbytes(i2c_adap, &msgs[i],
|
||
|
|
msgs[i + 1].len);
|
||
|
|
if (retval < 0)
|
||
|
|
goto err;
|
||
|
|
i++;
|
||
|
|
retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
|
||
|
|
} else {
|
||
|
|
/* write */
|
||
|
|
retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
|
||
|
|
}
|
||
|
|
if (retval < 0)
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
return num;
|
||
|
|
|
||
|
|
err:
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
static u32 cx23885_functionality(struct i2c_adapter *adap)
|
||
|
|
{
|
||
|
|
return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct i2c_algorithm cx23885_i2c_algo_template = {
|
||
|
|
.master_xfer = i2c_xfer,
|
||
|
|
.functionality = cx23885_functionality,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* ----------------------------------------------------------------------- */
|
||
|
|
|
||
|
|
static const struct i2c_adapter cx23885_i2c_adap_template = {
|
||
|
|
.name = "cx23885",
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.algo = &cx23885_i2c_algo_template,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct i2c_client cx23885_i2c_client_template = {
|
||
|
|
.name = "cx23885 internal",
|
||
|
|
};
|
||
|
|
|
||
|
|
static char *i2c_devs[128] = {
|
||
|
|
[0x10 >> 1] = "tda10048",
|
||
|
|
[0x12 >> 1] = "dib7000pc",
|
||
|
|
[0x1c >> 1] = "lgdt3303",
|
||
|
|
[0x80 >> 1] = "cs3308",
|
||
|
|
[0x82 >> 1] = "cs3308",
|
||
|
|
[0x86 >> 1] = "tda9887",
|
||
|
|
[0x32 >> 1] = "cx24227",
|
||
|
|
[0x88 >> 1] = "cx25837",
|
||
|
|
[0x84 >> 1] = "tda8295",
|
||
|
|
[0x98 >> 1] = "flatiron",
|
||
|
|
[0xa0 >> 1] = "eeprom",
|
||
|
|
[0xc0 >> 1] = "tuner/mt2131/tda8275",
|
||
|
|
[0xc2 >> 1] = "tuner/mt2131/tda8275/xc5000/xc3028",
|
||
|
|
[0xc8 >> 1] = "tuner/xc3028L",
|
||
|
|
};
|
||
|
|
|
||
|
|
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;
|
||
|
|
pr_info("%s: i2c scan: found device @ 0x%04x [%s]\n",
|
||
|
|
name, i, i2c_devs[i] ? i2c_devs[i] : "???");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* init + register i2c adapter */
|
||
|
|
int cx23885_i2c_register(struct cx23885_i2c *bus)
|
||
|
|
{
|
||
|
|
struct cx23885_dev *dev = bus->dev;
|
||
|
|
|
||
|
|
dprintk(1, "%s(bus = %d)\n", __func__, bus->nr);
|
||
|
|
|
||
|
|
bus->i2c_adap = cx23885_i2c_adap_template;
|
||
|
|
bus->i2c_client = cx23885_i2c_client_template;
|
||
|
|
bus->i2c_adap.dev.parent = &dev->pci->dev;
|
||
|
|
|
||
|
|
strscpy(bus->i2c_adap.name, bus->dev->name,
|
||
|
|
sizeof(bus->i2c_adap.name));
|
||
|
|
|
||
|
|
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) {
|
||
|
|
dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr);
|
||
|
|
if (i2c_scan) {
|
||
|
|
pr_info("%s: scan bus %d:\n",
|
||
|
|
dev->name, bus->nr);
|
||
|
|
do_i2c_scan(dev->name, &bus->i2c_client);
|
||
|
|
}
|
||
|
|
} else
|
||
|
|
pr_warn("%s: i2c bus %d register FAILED\n",
|
||
|
|
dev->name, bus->nr);
|
||
|
|
|
||
|
|
/* Instantiate the IR receiver device, if present */
|
||
|
|
if (0 == bus->i2c_rc) {
|
||
|
|
struct i2c_board_info info;
|
||
|
|
static const unsigned short addr_list[] = {
|
||
|
|
0x6b, I2C_CLIENT_END
|
||
|
|
};
|
||
|
|
|
||
|
|
memset(&info, 0, sizeof(struct i2c_board_info));
|
||
|
|
strscpy(info.type, "ir_video", I2C_NAME_SIZE);
|
||
|
|
/* Use quick read command for probe, some IR chips don't
|
||
|
|
* support writes */
|
||
|
|
i2c_new_probed_device(&bus->i2c_adap, &info, addr_list,
|
||
|
|
i2c_probe_func_quick_read);
|
||
|
|
}
|
||
|
|
|
||
|
|
return bus->i2c_rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
int cx23885_i2c_unregister(struct cx23885_i2c *bus)
|
||
|
|
{
|
||
|
|
i2c_del_adapter(&bus->i2c_adap);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void cx23885_av_clk(struct cx23885_dev *dev, int enable)
|
||
|
|
{
|
||
|
|
/* write 0 to bus 2 addr 0x144 via i2x_xfer() */
|
||
|
|
char buffer[3];
|
||
|
|
struct i2c_msg msg;
|
||
|
|
dprintk(1, "%s(enabled = %d)\n", __func__, enable);
|
||
|
|
|
||
|
|
/* Register 0x144 */
|
||
|
|
buffer[0] = 0x01;
|
||
|
|
buffer[1] = 0x44;
|
||
|
|
if (enable == 1)
|
||
|
|
buffer[2] = 0x05;
|
||
|
|
else
|
||
|
|
buffer[2] = 0x00;
|
||
|
|
|
||
|
|
msg.addr = 0x44;
|
||
|
|
msg.flags = I2C_M_TEN;
|
||
|
|
msg.len = 3;
|
||
|
|
msg.buf = buffer;
|
||
|
|
|
||
|
|
i2c_xfer(&dev->i2c_bus[2].i2c_adap, &msg, 1);
|
||
|
|
}
|