grub/bus/usb/usbhub.c

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/* usb.c - USB Hub Support. */
/*
* 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>
/* USB Supports 127 devices, with device 0 as special case. */
static struct grub_usb_device *grub_usb_devs[128];
/* Add a device that currently has device number 0 and resides on
CONTROLLER, the Hub reported that the device speed is SPEED. */
static grub_usb_device_t
grub_usb_hub_add_dev (grub_usb_controller_t controller, grub_usb_speed_t speed)
{
grub_usb_device_t dev;
int i;
2009-07-16 Pavel Roskin <proski@gnu.org> * kern/mm.c (grub_zalloc): New function. (grub_debug_zalloc): Likewise. * include/grub/mm.h: Declare grub_zalloc() and grub_debug_zalloc(). * util/misc.c (grub_zalloc): New function. * bus/usb/uhci.c (grub_uhci_pci_iter): Use grub_zalloc() instead of grub_malloc(), remove unneeded initializations. * bus/usb/usbhub.c (grub_usb_hub_add_dev): Likewise. * commands/extcmd.c (grub_extcmd_dispatcher): Likewise. * commands/parttool.c (grub_cmd_parttool): Likewise. * disk/i386/pc/biosdisk.c (grub_biosdisk_open): Likewise. * disk/raid5_recover.c (grub_raid5_recover): Likewise. * disk/raid6_recover.c (grub_raid6_recover): Likewise. * disk/usbms.c (grub_usbms_finddevs): Likewise. * efiemu/mm.c (grub_efiemu_request_memalign): Likewise. * efiemu/pnvram.c (grub_efiemu_pnvram): Likewise. (grub_cmd_efiemu_pnvram): Likewise. * fs/i386/pc/pxe.c (grub_pxefs_open): Likewise. * fs/iso9660.c (grub_iso9660_mount): Likewise. (grub_iso9660_iterate_dir): Likewise. * fs/jfs.c (grub_jfs_opendir): Likewise. * fs/ntfs.c (list_file): Likewise. (grub_ntfs_mount): Likewise. * kern/disk.c (grub_disk_open): Likewise. * kern/dl.c (grub_dl_load_core): Likewise. * kern/elf.c (grub_elf_file): Likewise. * kern/env.c (grub_env_context_open): Likewise. (grub_env_set): Likewise. (grub_env_set_data_slot): Likewise. * kern/file.c (grub_file_open): Likewise. * kern/fs.c (grub_fs_blocklist_open): Likewise. * loader/i386/multiboot.c (grub_module): Likewise. * loader/xnu.c (grub_xnu_create_key): Likewise. (grub_xnu_create_value): Likewise. * normal/main.c (grub_normal_add_menu_entry): Likewise. (read_config_file): Likewise. * normal/menu_entry.c (make_screen): Likewise. * partmap/sun.c (sun_partition_map_iterate): Likewise. * script/sh/lexer.c (grub_script_lexer_init): Likewise. * script/sh/script.c (grub_script_parse): Likewise. * video/bitmap.c (grub_video_bitmap_create): Likewise. * video/readers/jpeg.c (grub_video_reader_jpeg): Likewise. * video/readers/png.c (grub_png_output_byte): Likewise. (grub_video_reader_png): Likewise.
2009-07-16 22:14:09 +00:00
dev = grub_zalloc (sizeof (struct grub_usb_device));
if (! dev)
return NULL;
dev->controller = *controller;
dev->speed = speed;
grub_usb_device_initialize (dev);
/* Assign a new address to the device. */
for (i = 1; i < 128; i++)
{
if (! grub_usb_devs[i])
break;
}
if (i == 128)
{
grub_error (GRUB_ERR_IO, "Can't assign address to USB device");
return NULL;
}
grub_usb_control_msg (dev,
(GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_STANDARD
| GRUB_USB_REQTYPE_TARGET_DEV),
GRUB_USB_REQ_SET_ADDRESS,
i, 0, 0, NULL);
dev->addr = i;
dev->initialized = 1;
grub_usb_devs[i] = dev;
return dev;
}
static grub_err_t
grub_usb_add_hub (grub_usb_device_t dev)
{
struct grub_usb_usb_hubdesc hubdesc;
grub_err_t err;
int i;
grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_DEV),
GRUB_USB_REQ_GET_DESCRIPTOR,
(GRUB_USB_DESCRIPTOR_HUB << 8) | 0,
0, sizeof (hubdesc), (char *) &hubdesc);
/* Iterate over the Hub ports. */
for (i = 1; i <= hubdesc.portcnt; i++)
{
grub_uint32_t status;
/* Get the port status. */
err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
GRUB_USB_REQ_HUB_GET_PORT_STATUS,
0, i, sizeof (status), (char *) &status);
/* Just ignore the device if the Hub does not report the
status. */
if (err)
continue;
/* If connected, reset and enable the port. */
if (status & GRUB_USB_HUB_STATUS_CONNECTED)
{
grub_usb_speed_t speed;
/* Determine the device speed. */
if (status & GRUB_USB_HUB_STATUS_LOWSPEED)
speed = GRUB_USB_SPEED_LOW;
else
{
if (status & GRUB_USB_HUB_STATUS_HIGHSPEED)
speed = GRUB_USB_SPEED_HIGH;
else
speed = GRUB_USB_SPEED_FULL;
}
/* A device is actually connected to this port, not enable
the port. XXX: Why 0x03? According to some docs it
should be 0x0. Check the specification! */
err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
0x3, 0x4, i, 0, 0);
/* If the Hub does not cooperate for this port, just skip
the port. */
if (err)
continue;
/* Add the device and assign a device address to it. */
grub_usb_hub_add_dev (&dev->controller, speed);
}
}
return GRUB_ERR_NONE;
}
grub_usb_err_t
grub_usb_root_hub (grub_usb_controller_t controller)
{
grub_err_t err;
int ports;
int i;
/* Query the number of ports the root Hub has. */
ports = controller->dev->hubports (controller);
for (i = 0; i < ports; i++)
{
grub_usb_speed_t speed = controller->dev->detect_dev (controller, i);
if (speed != GRUB_USB_SPEED_NONE)
{
grub_usb_device_t dev;
/* Enable the port. */
err = controller->dev->portstatus (controller, i, 1);
if (err)
continue;
/* Enable the port and create a device. */
dev = grub_usb_hub_add_dev (controller, speed);
if (! dev)
continue;
/* If the device is a Hub, scan it for more devices. */
if (dev->descdev.class == 0x09)
grub_usb_add_hub (dev);
}
}
return GRUB_USB_ERR_NONE;
}
int
grub_usb_iterate (int (*hook) (grub_usb_device_t dev))
{
int i;
for (i = 0; i < 128; i++)
{
if (grub_usb_devs[i])
{
if (hook (grub_usb_devs[i]))
return 1;
}
}
return 0;
}