/*
 * gpio-hammer - example swiss army knife to shake GPIO lines on a system
 *
 * Copyright (C) 2016 Linus Walleij
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * Usage:
 *	gpio-hammer -n <device-name> -o <offset1> -o <offset2>
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdbool.h>
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>
#include <poll.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/ioctl.h>
#include <linux/gpio.h>
#include "gpio-utils.h"

int hammer_device(const char *device_name, unsigned int *lines, int nlines,
		  unsigned int loops)
{
	struct gpiohandle_data data;
	char swirr[] = "-\\|/";
	int fd;
	int ret;
	int i, j;
	unsigned int iteration = 0;

	memset(&data.values, 0, sizeof(data.values));
	ret = gpiotools_request_linehandle(device_name, lines, nlines,
					   GPIOHANDLE_REQUEST_OUTPUT, &data,
					   "gpio-hammler");
	if (ret < 0)
		goto exit_error;
	else
		fd = ret;

	ret = gpiotools_get_values(fd, &data);
	if (ret < 0)
		goto exit_close_error;

	fprintf(stdout, "Hammer lines [");
	for (i = 0; i < nlines; i++) {
		fprintf(stdout, "%d", lines[i]);
		if (i != (nlines - 1))
			fprintf(stdout, ", ");
	}
	fprintf(stdout, "] on %s, initial states: [", device_name);
	for (i = 0; i < nlines; i++) {
		fprintf(stdout, "%d", data.values[i]);
		if (i != (nlines - 1))
			fprintf(stdout, ", ");
	}
	fprintf(stdout, "]\n");

	/* Hammertime! */
	j = 0;
	while (1) {
		/* Invert all lines so we blink */
		for (i = 0; i < nlines; i++)
			data.values[i] = !data.values[i];

		ret = gpiotools_set_values(fd, &data);
		if (ret < 0)
			goto exit_close_error;

		/* Re-read values to get status */
		ret = gpiotools_get_values(fd, &data);
		if (ret < 0)
			goto exit_close_error;

		fprintf(stdout, "[%c] ", swirr[j]);
		j++;
		if (j == sizeof(swirr)-1)
			j = 0;

		fprintf(stdout, "[");
		for (i = 0; i < nlines; i++) {
			fprintf(stdout, "%d: %d", lines[i], data.values[i]);
			if (i != (nlines - 1))
				fprintf(stdout, ", ");
		}
		fprintf(stdout, "]\r");
		fflush(stdout);
		sleep(1);
		iteration++;
		if (loops && iteration == loops)
			break;
	}
	fprintf(stdout, "\n");
	ret = 0;

exit_close_error:
	gpiotools_release_linehandle(fd);
exit_error:
	return ret;
}

void print_usage(void)
{
	fprintf(stderr, "Usage: gpio-hammer [options]...\n"
		"Hammer GPIO lines, 0->1->0->1...\n"
		"  -n <name>  Hammer GPIOs on a named device (must be stated)\n"
		"  -o <n>     Offset[s] to hammer, at least one, several can be stated\n"
		" [-c <n>]    Do <n> loops (optional, infinite loop if not stated)\n"
		"  -?         This helptext\n"
		"\n"
		"Example:\n"
		"gpio-hammer -n gpiochip0 -o 4\n"
	);
}

int main(int argc, char **argv)
{
	const char *device_name = NULL;
	unsigned int lines[GPIOHANDLES_MAX];
	unsigned int loops = 0;
	int nlines;
	int c;
	int i;

	i = 0;
	while ((c = getopt(argc, argv, "c:n:o:?")) != -1) {
		switch (c) {
		case 'c':
			loops = strtoul(optarg, NULL, 10);
			break;
		case 'n':
			device_name = optarg;
			break;
		case 'o':
			lines[i] = strtoul(optarg, NULL, 10);
			i++;
			break;
		case '?':
			print_usage();
			return -1;
		}
	}
	nlines = i;

	if (!device_name || !nlines) {
		print_usage();
		return -1;
	}
	return hammer_device(device_name, lines, nlines, loops);
}
ected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Aleksander Morgado &lt;aleksander@aleksander.es&gt;</td><td class='right'>2017-01-18 21:31:31 +0100</td></tr>
<tr><th>committer</th><td>Johan Hovold &lt;johan@kernel.org&gt;</td><td class='right'>2017-01-19 09:08:37 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/phy?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>24d615a694d649aa2e167c3f97f62bdad07e3f84</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/phy?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>2fe33c115bdec6bf4b01e27afd90bb16fa668e22</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/phy?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>drivers/usb/phy</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/phy?id=49def1853334396f948dcb4cedb9347abb318df5'>49def1853334396f948dcb4cedb9347abb318df5</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/phy?id=24d615a694d649aa2e167c3f97f62bdad07e3f84&amp;id2=49def1853334396f948dcb4cedb9347abb318df5'>diff</a>)</td></tr></table>
<div class='commit-subject'>USB: serial: qcserial: add Dell DW5570 QDL</div><div class='commit-msg'>The Dell DW5570 is a re-branded Sierra Wireless MC8805 which will by
default boot with vid 0x413c and pid 0x81a3. When triggered QDL download
mode, the device switches to pid 0x81a6 and provides the standard TTY
used for firmware upgrade.

Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: Aleksander Morgado &lt;aleksander@aleksander.es&gt;
Signed-off-by: Johan Hovold &lt;johan@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=24d615a694d649aa2e167c3f97f62bdad07e3f84'>Diffstat</a> (limited to 'drivers/usb/phy')</div><table summary='diffstat' class='diffstat'>