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915152c0bd
This example shows how to learn what udcs are available in system and also how to find out what gadgets are enabled on them. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* Copyright (C) 2014 Samsung Electronics
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*
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* Krzysztof Opasiak <k.opasiak@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/**
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* @file show-udcs.c
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* @example show-udcs.c
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* This is an example of how to learn about UDCs available in system
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* and find out what gadget are enabled on them.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <usbg/usbg.h>
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int main(void)
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{
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int usbg_ret;
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int ret = -EINVAL;
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usbg_state *s;
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usbg_gadget *g;
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usbg_udc *u;
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const char *udc_name, *gadget_name;
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usbg_ret = usbg_init("/sys/kernel/config", &s);
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if (usbg_ret != USBG_SUCCESS) {
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fprintf(stderr, "Error on USB state init\n");
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fprintf(stderr, "Error: %s : %s\n", usbg_error_name(usbg_ret),
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usbg_strerror(usbg_ret));
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goto out;
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}
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usbg_for_each_udc(u, s) {
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udc_name = usbg_get_udc_name(u);
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g = usbg_get_udc_gadget(u);
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if (g)
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/* some gadget is enabled */
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gadget_name = usbg_get_gadget_name(g);
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else
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gadget_name = "";
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fprintf(stdout, "%s <-> %s\n", udc_name, gadget_name);
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}
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ret = 0;
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usbg_cleanup(s);
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out:
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return ret;
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}
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