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usb_storage : scan all interfaces to find a storage device

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Mass storage is not necessary present on interface 0. This
patch allow usb_stor_scan to look in every available interface.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
This commit is contained in:
Franck Jullien 2015-03-04 21:07:00 +01:00 committed by Marek Vasut
parent f33cdaa4c3
commit cd749658d5
1 changed files with 28 additions and 17 deletions
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45
common/usb_storage.c
View file

@ -208,6 +208,30 @@ static unsigned int usb_get_max_lun(struct us_data *us)
return (len > 0) ? *result : 0;
}
static int usb_storage_register(struct usb_device *dev, unsigned char iface)
{
int lun, max_lun, start = usb_max_devs;
int nb_dev = 0;
if (!usb_storage_probe(dev, iface, &usb_stor[usb_max_devs]))
return nb_dev;
/*
* OK, it's a storage device. Iterate over its LUNs
* and populate `usb_dev_desc'.
*/
max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV; lun++) {
usb_dev_desc[usb_max_devs].lun = lun;
if (usb_stor_get_info(dev, &usb_stor[start],
&usb_dev_desc[usb_max_devs]) == 1) {
nb_dev++;
}
}
return nb_dev;
}
/*******************************************************************************
* scan the usb and reports device info
* to the user if mode = 1
@ -215,7 +239,7 @@ static unsigned int usb_get_max_lun(struct us_data *us)
*/
int usb_stor_scan(int mode)
{
unsigned char i;
unsigned char i, iface;
struct usb_device *dev;
if (mode == 1)
@ -241,23 +265,10 @@ int usb_stor_scan(int mode)
if (dev == NULL)
break; /* no more devices available */
if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
/* OK, it's a storage device. Iterate over its LUNs
* and populate `usb_dev_desc'.
*/
int lun, max_lun, start = usb_max_devs;
max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
for (lun = 0;
lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
lun++) {
usb_dev_desc[usb_max_devs].lun = lun;
if (usb_stor_get_info(dev, &usb_stor[start],
&usb_dev_desc[usb_max_devs]) == 1) {
usb_max_devs++;
}
}
for (iface = 0; iface < dev->config.no_of_if; iface++) {
usb_max_devs += usb_storage_register(dev, iface);
}
/* if storage device */
if (usb_max_devs == USB_MAX_STOR_DEV) {
printf("max USB Storage Device reached: %d stopping\n",