diff options
Diffstat (limited to 'src/lan951x-led-ctl.c')
| -rw-r--r-- | src/lan951x-led-ctl.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/src/lan951x-led-ctl.c b/src/lan951x-led-ctl.c new file mode 100644 index 0000000..c60884c --- /dev/null +++ b/src/lan951x-led-ctl.c @@ -0,0 +1,162 @@ +/* + lan951x-led-ctl - control LEDs of LAN951X ethernet/usb controllers + + Copyright (C) 2015 Dominic Radermacher <dominic.radermacher@gmail.com> + + 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" + +/* 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); +} + +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 { + 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); +} |