| /* 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_get_string (grub_usb_device_t dev, grub_uint8_t index, int langid, |
| char **string) |
| { |
| struct grub_usb_desc_str descstr; |
| struct grub_usb_desc_str *descstrp; |
| grub_usb_err_t err; |
| |
| /* Only get the length. */ |
| err = grub_usb_control_msg (dev, 1 << 7, |
| 0x06, (3 << 8) | index, |
| langid, 1, (char *) &descstr); |
| if (err) |
| return err; |
| |
| descstrp = grub_malloc (descstr.length); |
| if (! descstrp) |
| return GRUB_USB_ERR_INTERNAL; |
| err = grub_usb_control_msg (dev, 1 << 7, |
| 0x06, (3 << 8) | index, |
| langid, descstr.length, (char *) descstrp); |
| |
| *string = grub_malloc (descstr.length / 2); |
| if (! *string) |
| { |
| grub_free (descstrp); |
| return GRUB_USB_ERR_INTERNAL; |
| } |
| |
| grub_utf16_to_utf8 ((grub_uint8_t *) *string, descstrp->str, descstrp->length / 2 - 1); |
| (*string)[descstr.length / 2 - 1] = '\0'; |
| grub_free (descstrp); |
| |
| return GRUB_USB_ERR_NONE; |
| } |
| |
| 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); |
| |
| /* 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; |
| } |