Compare commits
No commits in common. "0da970d40fdab8dbb39563e1e8e01b4aaa590c56" and "101117d0bc69d2693f6489793edf2300f2814b1a" have entirely different histories.
0da970d40f
...
101117d0bc
@ -8,9 +8,6 @@
|
||||
#include <linux/types.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/poll.h>
|
||||
|
||||
// #define ENABLE_DEBUG ENABLE_DEBUG
|
||||
|
||||
@ -23,20 +20,12 @@ static int debug_level = 0;
|
||||
module_param(debug_level, int, 0);
|
||||
MODULE_PARM_DESC(debug_level, "Debug level");
|
||||
|
||||
/* Only for chrdev... man they really suck! */
|
||||
static struct serdev_device *static_serdev = NULL;
|
||||
static DECLARE_WAIT_QUEUE_HEAD(wq);
|
||||
|
||||
static struct of_device_id lw35ioc_dt_ids[] = {
|
||||
{ .compatible = "brother,lw35", },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, lw35ioc_dt_ids);
|
||||
|
||||
/* Chardev */
|
||||
#define DEVICE_NAME "lw35"
|
||||
#define CLASS_NAME "lw35ioc"
|
||||
|
||||
/* Only used for initialization, not for actualy keycode mapping */
|
||||
static int keycode_map[] = {
|
||||
KEY_A, KEY_B, KEY_C, KEY_D, KEY_E, KEY_F, KEY_G, KEY_H, KEY_I, KEY_J,
|
||||
@ -55,7 +44,7 @@ static int keycode_map[] = {
|
||||
KEY_SYSRQ
|
||||
};
|
||||
|
||||
enum lw35ioc_state {PASSIVE = 0, PROG_KBD, PROG_PRI, BYPASS, ACTIVE, STATE_COUNT};
|
||||
enum lw35ioc_state {PASSIVE, PASSTHROUGH, ACTIVE};
|
||||
|
||||
enum lw35ioc_packet_state {SYNC, TYPE, KEYBOARD, PRINTER};
|
||||
|
||||
@ -63,24 +52,10 @@ struct lw35ioc_packet {
|
||||
enum lw35ioc_packet_state state;
|
||||
};
|
||||
|
||||
struct lw35ioc_chardev {
|
||||
int major_number;
|
||||
struct class* class;
|
||||
struct device* device;
|
||||
int open_count;
|
||||
};
|
||||
|
||||
#define UART_BUF_SIZE 256
|
||||
|
||||
struct lw35ioc_priv {
|
||||
struct serdev_device *serdev;
|
||||
struct input_dev *input_dev;
|
||||
struct gpio_desc *gpio_rst; /* GPIO to reset both AVRs */
|
||||
struct lw35ioc_chardev chardev;
|
||||
|
||||
char uart_buf_rx[UART_BUF_SIZE];
|
||||
char *uart_buf_rx_rd;
|
||||
char *uart_buf_rx_wr;
|
||||
|
||||
enum lw35ioc_state state;
|
||||
struct lw35ioc_packet packet;
|
||||
@ -143,33 +118,15 @@ static int lw35ioc_receive_buf(struct serdev_device *serdev,
|
||||
size_t count)
|
||||
{
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
int i;
|
||||
|
||||
if (priv->state == ACTIVE)
|
||||
return lw35ioc_process_buf(serdev, data, count);
|
||||
|
||||
for (i = 0; i < count; ++i) {
|
||||
#ifdef ENABLE_DEBUG
|
||||
dev_info(&serdev->dev, " RX [PSV]: %02x\n", data[i]);
|
||||
#endif
|
||||
*(priv->uart_buf_rx_wr) = data[i];
|
||||
if (priv->uart_buf_rx_wr == priv->uart_buf_rx + UART_BUF_SIZE - 1)
|
||||
priv->uart_buf_rx_wr = priv->uart_buf_rx;
|
||||
else
|
||||
priv->uart_buf_rx_wr++;
|
||||
|
||||
if (priv->uart_buf_rx_rd == priv->uart_buf_rx_wr) {
|
||||
dev_err(&serdev->dev, "UART RX buffer overflow.\n");
|
||||
}
|
||||
}
|
||||
|
||||
wake_up_interruptible(&wq);
|
||||
|
||||
return count; /* Pretend we read all data */
|
||||
}
|
||||
|
||||
static void lw35ioc_write_wakeup(struct serdev_device *serdev)
|
||||
{
|
||||
dev_info(&serdev->dev, "Write wakeup\n");
|
||||
// schedule work here
|
||||
}
|
||||
|
||||
@ -183,224 +140,19 @@ static void lw35ioc_set_hw_reset(struct serdev_device *serdev,
|
||||
{
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
gpiod_set_value(priv->gpio_rst, !!reset_active);
|
||||
}
|
||||
|
||||
static void lw35ioc_reset_ioc_hw(struct serdev_device *serdev)
|
||||
{
|
||||
dev_info(&serdev->dev, "Resetting IOC...\n");
|
||||
lw35ioc_set_hw_reset(serdev, 1);
|
||||
usleep_range(90000, 100000);
|
||||
lw35ioc_set_hw_reset(serdev, 0);
|
||||
usleep_range(90000, 100000);
|
||||
}
|
||||
|
||||
/* Chardev */
|
||||
static int lw35ioc_chardev_open(struct inode *inodep, struct file *filep) {
|
||||
struct serdev_device *serdev = static_serdev;
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
filep->private_data = serdev;
|
||||
|
||||
if (!priv->chardev.open_count) {
|
||||
dev_info(&serdev->dev, "Opened chardev.\n");
|
||||
|
||||
if (priv->state != ACTIVE &&
|
||||
priv->state != PASSIVE) {
|
||||
lw35ioc_reset_ioc_hw(serdev);
|
||||
|
||||
switch (priv->state) {
|
||||
case PROG_KBD:
|
||||
serdev_device_write(serdev, "X", 1, 0);
|
||||
dev_info(&serdev->dev, "Put ioc into programming mode: keyboard.\n");
|
||||
break;
|
||||
case PROG_PRI:
|
||||
serdev_device_write(serdev, "Y", 1, 0);
|
||||
dev_info(&serdev->dev, "Put ioc into programming mode: printer.\n");
|
||||
break;
|
||||
case BYPASS:
|
||||
serdev_device_write(serdev, "XX", 2, 0);
|
||||
dev_info(&serdev->dev, "Put ioc into bypass mode.\n");
|
||||
break;
|
||||
default:
|
||||
/* For other modes, we just wait for the reset to be over */
|
||||
usleep_range(1000000, 1010000);
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
dev_err(&serdev->dev, "Rejected. Device may only be opened once.\n");
|
||||
//return -EBUSY;
|
||||
}
|
||||
|
||||
priv->chardev.open_count++;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t lw35ioc_chardev_read(struct file *filep, char *buffer, size_t len, loff_t *offset) {
|
||||
struct serdev_device *serdev = filep->private_data;
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
int error_count;
|
||||
int available;
|
||||
|
||||
available = priv->uart_buf_rx_wr - priv->uart_buf_rx_rd;
|
||||
if (available < 0)
|
||||
available = 1;
|
||||
if (!available) { /* Wait for data to become available */
|
||||
wait_event_interruptible(wq, priv->uart_buf_rx_rd != priv->uart_buf_rx_wr);
|
||||
available = priv->uart_buf_rx_wr - priv->uart_buf_rx_rd;
|
||||
if (available < 0)
|
||||
available = 1;
|
||||
if (!available)
|
||||
return -EAGAIN;
|
||||
}
|
||||
|
||||
if (available < len)
|
||||
len = available;
|
||||
|
||||
error_count = copy_to_user(buffer, priv->uart_buf_rx_rd, len);
|
||||
len -= error_count;
|
||||
priv->uart_buf_rx_rd += len;
|
||||
if (priv->uart_buf_rx_rd >= priv->uart_buf_rx + UART_BUF_SIZE) {
|
||||
priv->uart_buf_rx_rd -= UART_BUF_SIZE;
|
||||
}
|
||||
|
||||
if (error_count == 0) {
|
||||
return len;
|
||||
} else {
|
||||
dev_err(&serdev->dev, "Failed to read %d characters to chardev.\n",
|
||||
error_count);
|
||||
return -EFAULT;
|
||||
}
|
||||
}
|
||||
|
||||
char msg[256]; // TODO
|
||||
static ssize_t lw35ioc_chardev_write(struct file *filep, const char *buffer, size_t len, loff_t *offset) {
|
||||
struct serdev_device *serdev = filep->private_data;
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
if (len > 256) {
|
||||
len = 256;
|
||||
}
|
||||
copy_from_user(msg, buffer, len);
|
||||
serdev_device_write_buf(serdev, msg, len);
|
||||
|
||||
return len;
|
||||
}
|
||||
|
||||
static int lw35ioc_chardev_release(struct inode *inodep, struct file *filep){
|
||||
struct serdev_device *serdev = filep->private_data;
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
priv->chardev.open_count--;
|
||||
|
||||
dev_info(&serdev->dev, "Device successfully closed\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define IOCTL_SET_MODE 42
|
||||
|
||||
static long lw35ioc_chardev_ioctl(struct file *filep, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
struct serdev_device *serdev = filep->private_data;
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
switch (cmd) {
|
||||
case IOCTL_SET_MODE:
|
||||
if (arg >= STATE_COUNT || arg < 0) {
|
||||
dev_err(&serdev->dev, "Invalid driver mode: %lu", arg);
|
||||
return -1;
|
||||
}
|
||||
priv->state = arg;
|
||||
dev_info(&serdev->dev, "Switched driver mode to: %lu. Will be applied with next open().\n", arg);
|
||||
break;
|
||||
default:
|
||||
dev_info(&serdev->dev, "Ignoring IOCTL %u(%lu)\n", cmd, arg);
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
__poll_t poll(struct file *filep, struct poll_table_struct *ptab)
|
||||
{
|
||||
struct serdev_device *serdev = filep->private_data;
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
poll_wait(filep, &wq, ptab);
|
||||
|
||||
if (priv->uart_buf_rx_wr != priv->uart_buf_rx_rd)
|
||||
return EPOLLIN | EPOLLRDNORM;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static struct file_operations fops =
|
||||
{
|
||||
.open = lw35ioc_chardev_open,
|
||||
.read = lw35ioc_chardev_read,
|
||||
.write = lw35ioc_chardev_write,
|
||||
.release = lw35ioc_chardev_release,
|
||||
.unlocked_ioctl = lw35ioc_chardev_ioctl,
|
||||
.poll = poll,
|
||||
};
|
||||
|
||||
|
||||
static int lw35ioc_cdev_init(struct serdev_device *serdev)
|
||||
{
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
priv->chardev.open_count = 0;
|
||||
|
||||
// Try to dynamically allocate a major number for the device
|
||||
priv->chardev.major_number = register_chrdev(0, DEVICE_NAME, &fops);
|
||||
if (priv->chardev.major_number < 0) {
|
||||
dev_err(&serdev->dev, "Failed to register a major number\n");
|
||||
return priv->chardev.major_number;
|
||||
}
|
||||
dev_info(&serdev->dev, "Registered correctly with major number %d\n", priv->chardev.major_number);
|
||||
|
||||
// Register the device class
|
||||
priv->chardev.class = class_create(THIS_MODULE, CLASS_NAME);
|
||||
if (IS_ERR(priv->chardev.class)) {
|
||||
unregister_chrdev(priv->chardev.major_number, DEVICE_NAME);
|
||||
dev_err(&serdev->dev, "Failed to register device class\n");
|
||||
return PTR_ERR(priv->chardev.class);
|
||||
}
|
||||
dev_info(&serdev->dev, "Device class registered correctly\n");
|
||||
|
||||
// Register the device driver
|
||||
priv->chardev.device = device_create(priv->chardev.class, NULL, MKDEV(priv->chardev.major_number, 0), NULL, DEVICE_NAME);
|
||||
if (IS_ERR(priv->chardev.device)) {
|
||||
class_destroy(priv->chardev.class);
|
||||
unregister_chrdev(priv->chardev.major_number, DEVICE_NAME);
|
||||
dev_err(&serdev->dev, "Failed to create the device\n");
|
||||
return PTR_ERR(priv->chardev.device);
|
||||
}
|
||||
|
||||
dev_err(&serdev->dev, "Device class created correctly\n");
|
||||
return 0;
|
||||
gpiod_set_value(priv->gpio_rst, !reset_active);
|
||||
}
|
||||
|
||||
static int lw35ioc_probe(struct serdev_device *serdev)
|
||||
{
|
||||
struct lw35ioc_priv *priv = NULL;
|
||||
int ret = 0;
|
||||
int ret;
|
||||
int i;
|
||||
u32 speed = 19200;
|
||||
struct input_dev *input_dev;
|
||||
|
||||
printk(KERN_INFO "lw35ioc: probe\n");
|
||||
|
||||
if (static_serdev) {
|
||||
printk(KERN_ERR "lw35ioc: Can only be loaded once.\n");
|
||||
goto fail_multicheck;
|
||||
}
|
||||
|
||||
/* Allocate memory */
|
||||
priv = devm_kzalloc(&serdev->dev,
|
||||
sizeof(struct lw35ioc_priv),
|
||||
@ -409,13 +161,8 @@ static int lw35ioc_probe(struct serdev_device *serdev)
|
||||
printk(KERN_ERR "lw35ioc: Not enough memory.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
priv->state = PASSIVE;
|
||||
priv->uart_buf_rx_rd = priv->uart_buf_rx;
|
||||
priv->uart_buf_rx_wr = priv->uart_buf_rx;
|
||||
|
||||
priv->serdev = serdev;
|
||||
static_serdev = serdev;
|
||||
priv->packet.state = SYNC;
|
||||
serdev_device_set_drvdata(serdev, priv);
|
||||
serdev_device_set_client_ops(serdev, &lw35ioc_serdev_ops);
|
||||
@ -453,23 +200,14 @@ static int lw35ioc_probe(struct serdev_device *serdev)
|
||||
priv->gpio_rst = gpiod_get_index(&serdev->dev,
|
||||
"rst",
|
||||
0,
|
||||
GPIOD_OUT_HIGH);
|
||||
|
||||
/* Register character device */
|
||||
ret = lw35ioc_cdev_init(serdev);
|
||||
if (ret) {
|
||||
dev_err(&serdev->dev, "Unable to initialize character device.\n");
|
||||
goto fail_gpio;
|
||||
}
|
||||
GPIOD_OUT_LOW);
|
||||
lw35ioc_set_hw_reset(serdev, 0);
|
||||
|
||||
if (IS_ERR(priv->gpio_rst)) {
|
||||
dev_err(&serdev->dev, "Unable to get reset GPIO.\n");
|
||||
ret = -ENODEV; /* TODO */
|
||||
ret = -ENODEV;
|
||||
goto fail_gpio;
|
||||
}
|
||||
|
||||
lw35ioc_reset_ioc_hw(serdev);
|
||||
|
||||
dev_info(&serdev->dev, "Loaded driver.\n");
|
||||
|
||||
return 0;
|
||||
@ -478,7 +216,6 @@ fail_serdev:
|
||||
input_unregister_device(input_dev);
|
||||
fail_input:
|
||||
devm_kfree(&serdev->dev, input_dev);
|
||||
fail_multicheck:
|
||||
return ret;
|
||||
}
|
||||
|
||||
@ -486,11 +223,6 @@ static void lw35ioc_remove(struct serdev_device *serdev)
|
||||
{
|
||||
struct lw35ioc_priv *priv = serdev_device_get_drvdata(serdev);
|
||||
|
||||
device_destroy(priv->chardev.class, MKDEV(priv->chardev.major_number, 0));
|
||||
class_unregister(priv->chardev.class);
|
||||
class_destroy(priv->chardev.class);
|
||||
unregister_chrdev(priv->chardev.major_number, DEVICE_NAME);
|
||||
|
||||
lw35ioc_set_hw_reset(serdev, 1);
|
||||
gpiod_put(priv->gpio_rst);
|
||||
serdev_device_close(priv->serdev);
|
||||
@ -511,3 +243,4 @@ static struct serdev_device_driver lw35ioc_driver = {
|
||||
};
|
||||
|
||||
module_serdev_device_driver(lw35ioc_driver);
|
||||
|
||||
|
||||
@ -1,76 +0,0 @@
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <stropts.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#define IOCTL_SET_MODE 42
|
||||
enum lw35ioc_state {PASSIVE = 0, PROG_KBD, PROG_PRI, BYPASS, ACTIVE, STATE_COUNT};
|
||||
|
||||
int f;
|
||||
|
||||
static void help(int argc, char *argv[])
|
||||
{
|
||||
fprintf(stderr,
|
||||
"usage: %s <command>\n\n"
|
||||
" command: set-mode <mode>\n"
|
||||
" mode: passive, active, rfu-kbd, rfu-pri, bypass\n",
|
||||
argv[0]);
|
||||
}
|
||||
|
||||
static int set_mode(int argc, char *argv[])
|
||||
{
|
||||
int mode = -1;
|
||||
|
||||
if (argc < 3) {
|
||||
help(argc, argv);
|
||||
return 10;
|
||||
}
|
||||
|
||||
if (!strcmp(argv[2], "passive"))
|
||||
mode = PASSIVE;
|
||||
else if (!strcmp(argv[2], "rfu-kbd"))
|
||||
mode = PROG_KBD;
|
||||
else if (!strcmp(argv[2], "rfu-pri"))
|
||||
mode = PROG_PRI;
|
||||
else if (!strcmp(argv[2], "bypass"))
|
||||
mode = BYPASS;
|
||||
else if (!strcmp(argv[2], "active"))
|
||||
mode = ACTIVE;
|
||||
|
||||
if (mode == -1) {
|
||||
fprintf(stderr, "Error: Invalid mode.\n");
|
||||
return 10;
|
||||
}
|
||||
|
||||
ioctl(f, IOCTL_SET_MODE, mode);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (argc < 2) {
|
||||
help(argc, argv);
|
||||
return 1;
|
||||
}
|
||||
|
||||
f = open("/dev/lw35", O_RDWR);
|
||||
if (f == -1) {
|
||||
fprintf(stderr, "Error opening lw35ioc device.\n");
|
||||
return 3;
|
||||
}
|
||||
|
||||
if (!strcmp(argv[1], "set-mode")) {
|
||||
ret = set_mode(argc, argv);
|
||||
} else {
|
||||
fprintf(stderr, "Unknown command.\n");
|
||||
ret = 2;
|
||||
}
|
||||
|
||||
close(f);
|
||||
|
||||
return ret;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user