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/*
lan7800-led-ctl - control LEDs of LAN7800 ethernet/usb controllers
Copyright (C) 2018-2024 Dominic Radermacher <dominic@familie-radermacher.ch>
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 3 as
published by the Free Software Foundation
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h> /* exit() */
#include <string.h> /* strlen() */
#include <stdint.h>
#include <libusb-1.0/libusb.h>
#include "lan7800-led-ctl.h"
#include "version.h" /* generated by cmake */
/* global variables */
int led_arr[3] = { MODE_KEEP, MODE_KEEP, MODE_KEEP };
libusb_device_handle *usbdev_open(int vid, int pid)
{
libusb_device **devs;
libusb_device *dev;
libusb_device_handle *handle = NULL;
struct libusb_device_descriptor desc;
int r,i=0;
if ((libusb_init(NULL)) < 0) {
fprintf(stderr, "libusb_init() failed\n");
return NULL;
}
if (libusb_get_device_list(NULL, &devs) < 0) {
return NULL;
}
while ((dev=devs[i++]) != NULL) {
if ((r=libusb_get_device_descriptor(dev, &desc)) < 0) {
fprintf(stderr, "failed to get device descriptor");
libusb_free_device_list(devs, 1);
return NULL;
}
if ((desc.idVendor == vid) && (desc.idProduct == pid)) {
if ((r=libusb_open(dev, &handle)) != 0) {
fprintf(stderr, "libusb_open error :%s\n", libusb_error_name(r));
return NULL;
}
libusb_free_device_list(devs, 1);
return handle;
}
}
libusb_free_device_list(devs, 1);
return NULL;
}
int lan7800_rd_reg(libusb_device_handle *h, uint16_t reg, uint32_t *val)
{
return libusb_control_transfer(h, LIBUSB_REQUEST_TYPE_VENDOR|0x80,
USB_VENDOR_REQUEST_RD_REG, 0, reg, (uint8_t *)val, 4,
USB_CTRL_TIMEOUT);
}
int lan7800_wr_reg(libusb_device_handle *h, uint16_t reg, uint32_t val)
{
return libusb_control_transfer(h, LIBUSB_REQUEST_TYPE_VENDOR,
USB_VENDOR_REQUEST_WR_REG, 0, reg, (uint8_t *)&val, 4,
USB_CTRL_TIMEOUT);
}
int ledmode(const char* s)
{
if (*s == '0') {
return MODE_OFF;
} else if (*s == '1') {
return MODE_ON;
} else if ((*s == 's') || (*s == 'S')) {
return MODE_STATUS;
}
return MODE_ERR;
}
void usage(void)
{
printf("usage: lan7800-led-ctl [--led0=x][--led1=x]\n");
printf("\twhere x is one of:\n");
printf("\t0 - turn LED off\n\t1 - turn LED on\n\ts - LED shows status\n");
exit(1);
}
void about(void)
{
printf("lan7800-led-ctl %s programmed by Dominic Radermacher\n", VERSION);
printf("For further info please visit\n");
printf("https://dominic.familie-radermacher.ch/computer/raspberry-pi/lan7800-led-ctl/\n");
printf("The latest version can be found in my git repo:\n");
printf("https://git.familie-radermacher.ch/linux/lan7800-led-ctl.git\n");
exit(1);
}
int parse_args(int argc, char **argv)
{
int i;
for (i=1; i<argc; i++) {
char *p=argv[i];
if (strncmp(p, "--led0=", 7) == 0) {
led_arr[0] = ledmode(p+7);
printf("setting LED0 to status %i\n", led_arr[0]);
} else if (strncmp(p, "--led1=", 7) == 0) {
led_arr[1] = ledmode(p+7);
printf("setting LED1 to status %i\n", led_arr[1]);
} else if (strcmp(p, "--about") == 0) {
about();
} else if (strcmp(p, "--version") == 0) {
about();
} else {
usage();
}
}
return i;
}
int main(int argc, char *argv[])
{
libusb_device_handle *handle = NULL;
uint32_t reg_hw_cfg;
uint32_t gp_mask[2];
gp_mask[0] = LED0_MASK;
gp_mask[1] = LED1_MASK;
if (argc < 2) {
printf("at least one argument is required\n");
usage();
}
parse_args(argc, argv);
if ((handle=usbdev_open(LAN7800_VENDOR_ID, LAN7800_PRODUCT_ID)) == NULL) {
printf("No LAN7800 found on USB (are you root?)\n");
exit(1);
}
lan7800_rd_reg(handle, REG_HW_CFG, ®_hw_cfg);
#ifdef DEBUG
printf("read HW_CFG register: %08x\n", reg_hw_cfg);
#endif
for (int i=0; i < 2; i++) {
if (led_arr[i] == MODE_ON) {
reg_hw_cfg &= ~(gp_mask[i] & HW_CFG_LED_EN);
printf("turning LED on not supported yet\n");
}
if (led_arr[i] == MODE_OFF) {
reg_hw_cfg &= ~(gp_mask[i] & HW_CFG_LED_EN);
}
if (led_arr[i] == MODE_STATUS) {
reg_hw_cfg |= (gp_mask[i] & HW_CFG_LED_EN);
}
}
#ifdef DEBUG
printf("write %08x to HG_CFG\n", reg_hw_cfg);
#endif
lan7800_wr_reg(handle, REG_HW_CFG, reg_hw_cfg);
libusb_close(handle);
}
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