mirror of
https://github.com/linux-usb-gadgets/libusbgx.git
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3749ccec3d
Let's remove typedefs from public structures to clearly indicate users which structures can be accessed and which should be used only as handles. Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
108 lines
2.7 KiB
C
108 lines
2.7 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 gadget-vid-pid-remove.c
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* @example gadget-vid-pid-remove.c
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* This is an example of how to find and remove an gadget device with given
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* Vendor ID and product ID.
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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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#define VENDOR 0x1d6b
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#define PRODUCT 0x0104
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int remove_gadget(usbg_gadget *g)
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{
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int usbg_ret;
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usbg_udc *u;
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/* Check if gadget is enabled */
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u = usbg_get_gadget_udc(g);
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/* If gadget is enable we have to disable it first */
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if (u) {
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usbg_ret = usbg_disable_gadget(g);
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if (usbg_ret != USBG_SUCCESS) {
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fprintf(stderr, "Error on USB disable gadget udc\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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}
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/* Remove gadget with USBG_RM_RECURSE flag to remove
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* also its configurations, functions and strings */
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usbg_ret = usbg_rm_gadget(g, USBG_RM_RECURSE);
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if (usbg_ret != USBG_SUCCESS) {
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fprintf(stderr, "Error on USB gadget remove\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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}
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out:
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return usbg_ret;
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}
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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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struct usbg_gadget_attrs g_attrs;
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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 out1;
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}
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g = usbg_get_first_gadget(s);
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while (g != NULL) {
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/* Get current gadget attrs to be compared */
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usbg_ret = usbg_get_gadget_attrs(g, &g_attrs);
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if (usbg_ret != USBG_SUCCESS) {
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fprintf(stderr, "Error on USB get gadget attrs\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 out2;
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}
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/* Compare attrs with given values and remove if suitable */
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if (g_attrs.idVendor == VENDOR && g_attrs.idProduct == PRODUCT) {
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usbg_gadget *g_next = usbg_get_next_gadget(g);
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usbg_ret = remove_gadget(g);
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if (usbg_ret != USBG_SUCCESS)
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goto out2;
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g = g_next;
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} else {
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g = usbg_get_next_gadget(g);
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}
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}
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out2:
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usbg_cleanup(s);
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out1:
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return ret;
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}
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