grub/grub-core/bus/usb/usb.c

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/* usb.c - Generic USB interfaces. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008 Free Software Foundation, Inc.
*
* GRUB 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, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/mm.h>
#include <grub/usb.h>
#include <grub/misc.h>
static grub_usb_controller_dev_t grub_usb_list;
void
grub_usb_controller_dev_register (grub_usb_controller_dev_t usb)
{
auto int iterate_hook (grub_usb_controller_t dev);
/* Iterate over all controllers found by the driver. */
int iterate_hook (grub_usb_controller_t dev)
{
dev->dev = usb;
/* Enable the ports of the USB Root Hub. */
grub_usb_root_hub (dev);
return 0;
}
usb->next = grub_usb_list;
grub_usb_list = usb;
if (usb->iterate)
usb->iterate (iterate_hook);
}
void
grub_usb_controller_dev_unregister (grub_usb_controller_dev_t usb)
{
grub_usb_controller_dev_t *p, q;
for (p = &grub_usb_list, q = *p; q; p = &(q->next), q = q->next)
if (q == usb)
{
*p = q->next;
break;
}
}
#if 0
int
grub_usb_controller_iterate (int (*hook) (grub_usb_controller_t dev))
{
grub_usb_controller_dev_t p;
auto int iterate_hook (grub_usb_controller_t dev);
int iterate_hook (grub_usb_controller_t dev)
{
dev->dev = p;
if (hook (dev))
return 1;
return 0;
}
/* Iterate over all controller drivers. */
for (p = grub_usb_list; p; p = p->next)
{
/* Iterate over the busses of the controllers. XXX: Actually, a
hub driver should do this. */
if (p->iterate (iterate_hook))
return 1;
}
return 0;
}
#endif
grub_usb_err_t
grub_usb_clear_halt (grub_usb_device_t dev, int endpoint)
{
dev->toggle[endpoint] = 0;
return grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_STANDARD
| GRUB_USB_REQTYPE_TARGET_ENDP),
GRUB_USB_REQ_CLEAR_FEATURE,
GRUB_USB_FEATURE_ENDP_HALT,
endpoint, 0, 0);
}
grub_usb_err_t
grub_usb_set_configuration (grub_usb_device_t dev, int configuration)
{
int i;
for (i = 0; i < 16; i++)
dev->toggle[i] = 0;
return grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_STANDARD
| GRUB_USB_REQTYPE_TARGET_DEV),
GRUB_USB_REQ_SET_CONFIGURATION, configuration,
0, 0, NULL);
}
grub_usb_err_t
grub_usb_get_descriptor (grub_usb_device_t dev,
grub_uint8_t type, grub_uint8_t index,
grub_size_t size, char *data)
{
return grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
| GRUB_USB_REQTYPE_STANDARD
| GRUB_USB_REQTYPE_TARGET_DEV),
GRUB_USB_REQ_GET_DESCRIPTOR,
(type << 8) | index,
0, size, data);
}
struct grub_usb_desc_endp *
grub_usb_get_endpdescriptor (grub_usb_device_t usbdev, int addr)
{
int i;
for (i = 0; i < usbdev->config[0].descconf->numif; i++)
{
struct grub_usb_desc_if *interf;
int j;
interf = usbdev->config[0].interf[i].descif;
for (j = 0; j < interf->endpointcnt; j++)
{
struct grub_usb_desc_endp *endp;
endp = &usbdev->config[0].interf[i].descendp[j];
if (endp->endp_addr == addr)
return endp;
}
}
return NULL;
}
grub_usb_err_t
grub_usb_device_initialize (grub_usb_device_t dev)
{
struct grub_usb_desc_device *descdev;
struct grub_usb_desc_config config;
grub_usb_err_t err;
int i;
err = grub_usb_get_descriptor (dev, GRUB_USB_DESCRIPTOR_DEVICE,
0, sizeof (struct grub_usb_desc_device),
(char *) &dev->descdev);
if (err)
return err;
descdev = &dev->descdev;
for (i = 0; i < 8; i++)
dev->config[i].descconf = NULL;
for (i = 0; i < descdev->configcnt; i++)
{
int pos;
int currif;
char *data;
/* First just read the first 4 bytes of the configuration
descriptor, after that it is known how many bytes really have
to be read. */
err = grub_usb_get_descriptor (dev, GRUB_USB_DESCRIPTOR_CONFIG, i, 4,
(char *) &config);
data = grub_malloc (config.totallen);
if (! data)
{
err = GRUB_USB_ERR_INTERNAL;
goto fail;
}
dev->config[i].descconf = (struct grub_usb_desc_config *) data;
err = grub_usb_get_descriptor (dev, GRUB_USB_DESCRIPTOR_CONFIG, i,
config.totallen, data);
if (err)
goto fail;
/* Skip the configuration descriptor. */
pos = sizeof (struct grub_usb_desc_config);
2009-06-10 21:04:23 +00:00
/* Read all interfaces. */
for (currif = 0; currif < dev->config[i].descconf->numif; currif++)
{
dev->config[i].interf[currif].descif
= (struct grub_usb_desc_if *) &data[pos];
pos += sizeof (struct grub_usb_desc_if);
/* Point to the first endpoint. */
dev->config[i].interf[currif].descendp
= (struct grub_usb_desc_endp *) &data[pos];
pos += (sizeof (struct grub_usb_desc_endp)
* dev->config[i].interf[currif].descif->endpointcnt);
}
}
return GRUB_USB_ERR_NONE;
fail:
for (i = 0; i < 8; i++)
grub_free (dev->config[i].descconf);
return err;
}