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/*
lan951x-led-ctl - control LEDs of LAN951X ethernet/usb controllers
Copyright (C) 2015-2022 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 "lan951x-led-ctl.h"
#include "version.h"
/* global variables */
int led_arr[3] = { MODE_KEEP, MODE_KEEP, MODE_KEEP };
libusb_device_handle* lan951x_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;
}
// libusb_set_debug(NULL, 3);
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)) {
// fprintf(stderr, "LAN951x found on USB bus %d, device %d\n",
// libusb_get_bus_number(dev),
// libusb_get_device_address(dev));
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;
}
}
fprintf(stderr, "No LAN951x found on USB\n");
libusb_free_device_list(devs, 1);
return NULL;
}
int lan951x_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 lan951x_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: lan951x-led-ctl [--fdx=x][--lnk=x][--spd=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("lan951x-led-ctl %s programmed by Dominic Radermacher\n\n", VERSION);
printf("For further info plese visit\n");
printf("https://dominic.familie-radermacher.ch/computer/raspberry-pi/lan951x-led-ctl/\n\n");
printf("The latest version can be found in my git repo:\n");
printf("https://git.familie-radermacher.ch/linux/lan951x-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, "--fdx=", 6) == 0) {
led_arr[DUPIDX] = ledmode(p+6);
printf("setting FDX LED to status %i\n", led_arr[DUPIDX]);
} else if (strncmp(p, "--lnk=", 6) == 0) {
led_arr[LNKIDX] = ledmode(p+6);
printf("setting LNK LED to status %i\n", led_arr[LNKIDX]);
} else if (strncmp(p, "--spd=", 6) == 0) {
led_arr[SPDIDX] = ledmode(p+6);
printf("setting SPD LED to status %i\n", led_arr[SPDIDX]);
} else if (strcmp(p, "--version") == 0) {
about();
} else {
usage();
}
}
return i;
}
int main(int argc, char* argv[])
{
libusb_device_handle* handle = NULL;
uint32_t val;
if (argc < 2) {
printf("at least one argument is required\n");
usage();
}
parse_args(argc, argv);
uint32_t gp_mask[3];
gp_mask[DUPIDX] = DUP_MASK;
gp_mask[LNKIDX] = LNK_MASK;
gp_mask[SPDIDX] = SPD_MASK;
if ((handle=lan951x_open(LAN951X_VENDOR_ID, LAN951X_PRODUCT_ID)) == NULL) {
printf("can not open usb device. are you root?\n");
exit(1);
}
lan951x_rd_reg(handle, LED_GPIO_CFG, &val);
for (int i=0; i < 3; ++i) {
if (led_arr[i] == MODE_ON) {
val &= ~(gp_mask[i] & (GP_ALLCTL|GP_ALLDAT));
val |= (gp_mask[i] & GP_ALLDIR);
}
if (led_arr[i] == MODE_OFF) {
val &= ~(gp_mask[i] & GP_ALLCTL);
val |= (gp_mask[i] & (GP_ALLDIR|GP_ALLDAT));
}
if (led_arr[i] == MODE_STATUS) {
val &= ~(gp_mask[i] & (GP_ALLDIR|GP_ALLDAT));
val |= (gp_mask[i] & GP_ALLCTL);
}
}
lan951x_wr_reg(handle, LED_GPIO_CFG, val);
libusb_close(handle);
}
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