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/*
* Copyright © 2009 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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 "aoview.h"
#include <ctype.h>
#include <dirent.h>
static char *
load_string(char *dir, char *file)
{
char *full = aoview_fullname(dir, file);
char line[4096];
char *r;
FILE *f;
int rlen;
f = fopen(full, "r");
free(full);
if (!f)
return NULL;
r = fgets(line, sizeof (line), f);
fclose(f);
if (!r)
return NULL;
rlen = strlen(r);
if (r[rlen-1] == '\n')
r[rlen-1] = '\0';
return strdup(r);
}
static int
load_hex(char *dir, char *file)
{
char *line;
char *end;
long i;
line = load_string(dir, file);
if (!line)
return -1;
i = strtol(line, &end, 16);
free(line);
if (end == line)
return -1;
return i;
}
static int
dir_filter_tty(const struct dirent *d)
{
return strncmp(d->d_name, "tty:", 4) == 0;
}
static char *
usb_tty(char *sys)
{
char *base;
int num_configs;
int config;
struct dirent **namelist;
int interface;
int num_interfaces;
char endpoint_base[20];
char *endpoint_full;
int ntty;
char *tty;
base = aoview_basename(sys);
num_configs = load_hex(sys, "bNumConfigurations");
num_interfaces = load_hex(sys, "bNumInterfaces");
for (config = 1; config <= num_configs; config++) {
for (interface = 0; interface < num_interfaces; interface++) {
sprintf(endpoint_base, "%s:%d.%d",
base, config, interface);
endpoint_full = aoview_fullname(sys, endpoint_base);
ntty = scandir(endpoint_full, &namelist,
dir_filter_tty,
alphasort);
free(endpoint_full);
if (ntty) {
tty = aoview_fullname("/dev", namelist[0]->d_name + 4);
free(namelist);
return tty;
}
}
}
return NULL;
}
static struct usbdev *
usb_scan_device(char *sys)
{
struct usbdev *usbdev;
usbdev = calloc(1, sizeof (struct usbdev));
if (!usbdev)
return NULL;
usbdev->sys = strdup(sys);
usbdev->manufacturer = load_string(sys, "manufacturer");
usbdev->product = load_string(sys, "product");
usbdev->serial = load_string(sys, "serial");
usbdev->idProduct = load_hex(sys, "idProduct");
usbdev->idVendor = load_hex(sys, "idVendor");
usbdev->tty = usb_tty(sys);
return usbdev;
}
void
aoview_usbdev_free(struct usbdev *usbdev)
{
free(usbdev->sys);
free(usbdev->manufacturer);
free(usbdev->product);
free(usbdev->serial);
free(usbdev->tty);
free(usbdev);
}
#define USB_DEVICES "/sys/bus/usb/devices"
static int
dir_filter_dev(const struct dirent *d)
{
const char *n = d->d_name;
char c;
while ((c = *n++)) {
if (isdigit(c))
continue;
if (c == '-')
continue;
return 0;
}
return 1;
}
int
aoview_usb_scan(struct usbdev ***devs_ret)
{
int n;
int ndev = 0;
int e;
struct dirent **ents;
char *dir;
struct usbdev **devs = NULL;
struct usbdev *dev;
n = scandir (USB_DEVICES, &ents,
dir_filter_dev,
alphasort);
if (!n)
return 0;
for (e = 0; e < n; e++) {
dir = aoview_fullname(USB_DEVICES, ents[e]->d_name);
dev = usb_scan_device(dir);
free(dir);
if (dev->idVendor == 0xfffe && dev->tty) {
if (devs)
devs = realloc(devs, ndev + 1 * sizeof (struct usbdev *));
else
devs = malloc (sizeof (struct usbdev *));
devs[ndev++] = dev;
}
}
free(ents);
*devs_ret = devs;
return ndev;
}
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