e745cf0ca6
guidelines. * grub-core/kern/dl.c (grub_dl_check_license): New function. (grub_dl_load_core): Use grub_dl_check_license. * include/grub/dl.h (GRUB_MOD_SECTION): New macro. (GRUB_MOD_LICENSE): Likewise. (GRUB_MOD_DUAL_LICENSE): Likewise. All modules updated.
441 lines
13 KiB
C
441 lines
13 KiB
C
/* usbms.c - USB Mass Storage 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/scsi.h>
|
||
#include <grub/scsicmd.h>
|
||
#include <grub/misc.h>
|
||
|
||
GRUB_MOD_LICENSE ("GPLv3+");
|
||
|
||
#define GRUB_USBMS_DIRECTION_BIT 7
|
||
|
||
/* The USB Mass Storage Command Block Wrapper. */
|
||
struct grub_usbms_cbw
|
||
{
|
||
grub_uint32_t signature;
|
||
grub_uint32_t tag;
|
||
grub_uint32_t transfer_length;
|
||
grub_uint8_t flags;
|
||
grub_uint8_t lun;
|
||
grub_uint8_t length;
|
||
grub_uint8_t cbwcb[16];
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_usbms_csw
|
||
{
|
||
grub_uint32_t signature;
|
||
grub_uint32_t tag;
|
||
grub_uint32_t residue;
|
||
grub_uint8_t status;
|
||
} __attribute__ ((packed));
|
||
|
||
struct grub_usbms_dev
|
||
{
|
||
struct grub_usb_device *dev;
|
||
|
||
int luns;
|
||
|
||
int config;
|
||
int interface;
|
||
struct grub_usb_desc_endp *in;
|
||
struct grub_usb_desc_endp *out;
|
||
|
||
int in_maxsz;
|
||
int out_maxsz;
|
||
};
|
||
typedef struct grub_usbms_dev *grub_usbms_dev_t;
|
||
|
||
/* FIXME: remove limit. */
|
||
#define MAX_USBMS_DEVICES 128
|
||
static grub_usbms_dev_t grub_usbms_devices[MAX_USBMS_DEVICES];
|
||
static int first_available_slot = 0;
|
||
|
||
static grub_err_t
|
||
grub_usbms_reset (grub_usb_device_t dev, int interface)
|
||
{
|
||
grub_usb_err_t u;
|
||
u = grub_usb_control_msg (dev, 0x21, 255, 0, interface, 0, 0);
|
||
if (u)
|
||
return grub_error (GRUB_ERR_IO, "USB error %d", u);
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static void
|
||
grub_usbms_detach (grub_usb_device_t usbdev, int config, int interface)
|
||
{
|
||
unsigned i;
|
||
for (i = 0; i < ARRAY_SIZE (grub_usbms_devices); i++)
|
||
if (grub_usbms_devices[i] && grub_usbms_devices[i]->dev == usbdev
|
||
&& grub_usbms_devices[i]->interface == interface
|
||
&& grub_usbms_devices[i]->config == config)
|
||
{
|
||
grub_free (grub_usbms_devices[i]);
|
||
grub_usbms_devices[i] = 0;
|
||
}
|
||
}
|
||
|
||
static int
|
||
grub_usbms_attach (grub_usb_device_t usbdev, int configno, int interfno)
|
||
{
|
||
struct grub_usb_desc_if *interf
|
||
= usbdev->config[configno].interf[interfno].descif;
|
||
int j;
|
||
grub_uint8_t luns = 0;
|
||
unsigned curnum;
|
||
grub_usb_err_t err;
|
||
|
||
if (first_available_slot == ARRAY_SIZE (grub_usbms_devices))
|
||
return 0;
|
||
|
||
curnum = first_available_slot;
|
||
first_available_slot++;
|
||
|
||
interf = usbdev->config[configno].interf[interfno].descif;
|
||
|
||
if ((interf->subclass != GRUB_USBMS_SUBCLASS_BULK
|
||
/* Experimental support of RBC, MMC-2, UFI, SFF-8070i devices */
|
||
&& interf->subclass != GRUB_USBMS_SUBCLASS_RBC
|
||
&& interf->subclass != GRUB_USBMS_SUBCLASS_MMC2
|
||
&& interf->subclass != GRUB_USBMS_SUBCLASS_UFI
|
||
&& interf->subclass != GRUB_USBMS_SUBCLASS_SFF8070 )
|
||
|| interf->protocol != GRUB_USBMS_PROTOCOL_BULK)
|
||
return 0;
|
||
|
||
grub_usbms_devices[curnum] = grub_zalloc (sizeof (struct grub_usbms_dev));
|
||
if (! grub_usbms_devices[curnum])
|
||
return 0;
|
||
|
||
grub_usbms_devices[curnum]->dev = usbdev;
|
||
grub_usbms_devices[curnum]->interface = interfno;
|
||
|
||
grub_dprintf ("usbms", "alive\n");
|
||
|
||
/* Iterate over all endpoints of this interface, at least a
|
||
IN and OUT bulk endpoint are required. */
|
||
for (j = 0; j < interf->endpointcnt; j++)
|
||
{
|
||
struct grub_usb_desc_endp *endp;
|
||
endp = &usbdev->config[0].interf[interfno].descendp[j];
|
||
|
||
if ((endp->endp_addr & 128) && (endp->attrib & 3) == 2)
|
||
{
|
||
/* Bulk IN endpoint. */
|
||
grub_usbms_devices[curnum]->in = endp;
|
||
/* Clear Halt is not possible yet! */
|
||
/* grub_usb_clear_halt (usbdev, endp->endp_addr); */
|
||
grub_usbms_devices[curnum]->in_maxsz = endp->maxpacket;
|
||
}
|
||
else if (!(endp->endp_addr & 128) && (endp->attrib & 3) == 2)
|
||
{
|
||
/* Bulk OUT endpoint. */
|
||
grub_usbms_devices[curnum]->out = endp;
|
||
/* Clear Halt is not possible yet! */
|
||
/* grub_usb_clear_halt (usbdev, endp->endp_addr); */
|
||
grub_usbms_devices[curnum]->out_maxsz = endp->maxpacket;
|
||
}
|
||
}
|
||
|
||
if (!grub_usbms_devices[curnum]->in || !grub_usbms_devices[curnum]->out)
|
||
{
|
||
grub_free (grub_usbms_devices[curnum]);
|
||
grub_usbms_devices[curnum] = 0;
|
||
return 0;
|
||
}
|
||
|
||
grub_dprintf ("usbms", "alive\n");
|
||
|
||
/* XXX: Activate the first configuration. */
|
||
grub_usb_set_configuration (usbdev, 1);
|
||
|
||
/* Query the amount of LUNs. */
|
||
err = grub_usb_control_msg (usbdev, 0xA1, 254, 0, interfno, 1, (char *) &luns);
|
||
|
||
if (err)
|
||
{
|
||
/* In case of a stall, clear the stall. */
|
||
if (err == GRUB_USB_ERR_STALL)
|
||
{
|
||
grub_usb_clear_halt (usbdev, grub_usbms_devices[curnum]->in->endp_addr);
|
||
grub_usb_clear_halt (usbdev, grub_usbms_devices[curnum]->out->endp_addr);
|
||
}
|
||
/* Just set the amount of LUNs to one. */
|
||
grub_errno = GRUB_ERR_NONE;
|
||
grub_usbms_devices[curnum]->luns = 1;
|
||
}
|
||
else
|
||
/* luns = 0 means one LUN with ID 0 present ! */
|
||
/* We get from device not number of LUNs but highest
|
||
* LUN number. LUNs are numbered from 0,
|
||
* i.e. number of LUNs is luns+1 ! */
|
||
grub_usbms_devices[curnum]->luns = luns + 1;
|
||
|
||
grub_dprintf ("usbms", "alive\n");
|
||
|
||
usbdev->config[configno].interf[interfno].detach_hook = grub_usbms_detach;
|
||
|
||
#if 0 /* All this part should be probably deleted.
|
||
* This make trouble on some devices if they are not in
|
||
* Phase Error state - and there they should be not in such state...
|
||
* Bulk only mass storage reset procedure should be used only
|
||
* on place and in time when it is really necessary. */
|
||
/* Reset recovery procedure */
|
||
/* Bulk-Only Mass Storage Reset, after the reset commands
|
||
will be accepted. */
|
||
grub_usbms_reset (usbdev, i);
|
||
grub_usb_clear_halt (usbdev, usbms->in->endp_addr);
|
||
grub_usb_clear_halt (usbdev, usbms->out->endp_addr);
|
||
#endif
|
||
|
||
return 1;
|
||
}
|
||
|
||
|
||
|
||
static int
|
||
grub_usbms_iterate (int (*hook) (int bus, int luns))
|
||
{
|
||
unsigned i;
|
||
|
||
grub_usb_poll_devices ();
|
||
|
||
for (i = 0; i < ARRAY_SIZE (grub_usbms_devices); i++)
|
||
if (grub_usbms_devices[i])
|
||
{
|
||
if (hook (i, grub_usbms_devices[i]->luns))
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_usbms_transfer (struct grub_scsi *scsi, grub_size_t cmdsize, char *cmd,
|
||
grub_size_t size, char *buf, int read_write)
|
||
{
|
||
struct grub_usbms_cbw cbw;
|
||
grub_usbms_dev_t dev = (grub_usbms_dev_t) scsi->data;
|
||
struct grub_usbms_csw status;
|
||
static grub_uint32_t tag = 0;
|
||
grub_usb_err_t err = GRUB_USB_ERR_NONE;
|
||
grub_usb_err_t errCSW = GRUB_USB_ERR_NONE;
|
||
int retrycnt = 3 + 1;
|
||
|
||
retry:
|
||
retrycnt--;
|
||
if (retrycnt == 0)
|
||
return grub_error (GRUB_ERR_IO, "USB Mass Storage stalled");
|
||
|
||
/* Setup the request. */
|
||
grub_memset (&cbw, 0, sizeof (cbw));
|
||
cbw.signature = grub_cpu_to_le32 (0x43425355);
|
||
cbw.tag = tag++;
|
||
cbw.transfer_length = grub_cpu_to_le32 (size);
|
||
cbw.flags = (!read_write) << GRUB_USBMS_DIRECTION_BIT;
|
||
cbw.lun = scsi->lun; /* In USB MS CBW are LUN bits on another place than in SCSI CDB, both should be set correctly. */
|
||
cbw.length = cmdsize;
|
||
grub_memcpy (cbw.cbwcb, cmd, cmdsize);
|
||
|
||
/* Debug print of CBW content. */
|
||
grub_dprintf ("usb", "CBW: sign=0x%08x tag=0x%08x len=0x%08x\n",
|
||
cbw.signature, cbw.tag, cbw.transfer_length);
|
||
grub_dprintf ("usb", "CBW: flags=0x%02x lun=0x%02x CB_len=0x%02x\n",
|
||
cbw.flags, cbw.lun, cbw.length);
|
||
grub_dprintf ("usb", "CBW: cmd:\n %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
||
cbw.cbwcb[ 0], cbw.cbwcb[ 1], cbw.cbwcb[ 2], cbw.cbwcb[ 3],
|
||
cbw.cbwcb[ 4], cbw.cbwcb[ 5], cbw.cbwcb[ 6], cbw.cbwcb[ 7],
|
||
cbw.cbwcb[ 8], cbw.cbwcb[ 9], cbw.cbwcb[10], cbw.cbwcb[11],
|
||
cbw.cbwcb[12], cbw.cbwcb[13], cbw.cbwcb[14], cbw.cbwcb[15]);
|
||
|
||
/* Write the request.
|
||
* XXX: Error recovery is maybe still not fully correct. */
|
||
err = grub_usb_bulk_write (dev->dev, dev->out->endp_addr,
|
||
sizeof (cbw), (char *) &cbw);
|
||
if (err)
|
||
{
|
||
if (err == GRUB_USB_ERR_STALL)
|
||
{
|
||
grub_usb_clear_halt (dev->dev, dev->out->endp_addr);
|
||
goto CheckCSW;
|
||
}
|
||
return grub_error (GRUB_ERR_IO, "USB Mass Storage request failed");
|
||
}
|
||
|
||
/* Read/write the data, (maybe) according to specification. */
|
||
if (size && (read_write == 0))
|
||
{
|
||
err = grub_usb_bulk_read (dev->dev, dev->in->endp_addr, size, buf);
|
||
grub_dprintf ("usb", "read: %d %d\n", err, GRUB_USB_ERR_STALL);
|
||
if (err)
|
||
{
|
||
if (err == GRUB_USB_ERR_STALL)
|
||
grub_usb_clear_halt (dev->dev, dev->in->endp_addr);
|
||
goto CheckCSW;
|
||
}
|
||
/* Debug print of received data. */
|
||
grub_dprintf ("usb", "buf:\n");
|
||
if (size <= 64)
|
||
{
|
||
unsigned i;
|
||
for (i = 0; i < size; i++)
|
||
grub_dprintf ("usb", "0x%02x: 0x%02x\n", i, buf[i]);
|
||
}
|
||
else
|
||
grub_dprintf ("usb", "Too much data for debug print...\n");
|
||
}
|
||
else if (size)
|
||
{
|
||
err = grub_usb_bulk_write (dev->dev, dev->out->endp_addr, size, buf);
|
||
grub_dprintf ("usb", "write: %d %d\n", err, GRUB_USB_ERR_STALL);
|
||
grub_dprintf ("usb", "First 16 bytes of sent data:\n %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
||
buf[ 0], buf[ 1], buf[ 2], buf[ 3],
|
||
buf[ 4], buf[ 5], buf[ 6], buf[ 7],
|
||
buf[ 8], buf[ 9], buf[10], buf[11],
|
||
buf[12], buf[13], buf[14], buf[15]);
|
||
if (err)
|
||
{
|
||
if (err == GRUB_USB_ERR_STALL)
|
||
grub_usb_clear_halt (dev->dev, dev->out->endp_addr);
|
||
goto CheckCSW;
|
||
}
|
||
/* Debug print of sent data. */
|
||
if (size <= 256)
|
||
{
|
||
unsigned i;
|
||
for (i=0; i<size; i++)
|
||
grub_dprintf ("usb", "0x%02x: 0x%02x\n", i, buf[i]);
|
||
}
|
||
else
|
||
grub_dprintf ("usb", "Too much data for debug print...\n");
|
||
}
|
||
|
||
/* Read the status - (maybe) according to specification. */
|
||
CheckCSW:
|
||
errCSW = grub_usb_bulk_read (dev->dev, dev->in->endp_addr,
|
||
sizeof (status), (char *) &status);
|
||
if (errCSW)
|
||
{
|
||
grub_usb_clear_halt (dev->dev, dev->in->endp_addr);
|
||
errCSW = grub_usb_bulk_read (dev->dev, dev->in->endp_addr,
|
||
sizeof (status), (char *) &status);
|
||
if (errCSW)
|
||
{ /* Bulk-only reset device. */
|
||
grub_dprintf ("usb", "Bulk-only reset device - errCSW\n");
|
||
grub_usbms_reset (dev->dev, dev->interface);
|
||
grub_usb_clear_halt (dev->dev, dev->in->endp_addr);
|
||
grub_usb_clear_halt (dev->dev, dev->out->endp_addr);
|
||
goto retry;
|
||
}
|
||
}
|
||
|
||
/* Debug print of CSW content. */
|
||
grub_dprintf ("usb", "CSW: sign=0x%08x tag=0x%08x resid=0x%08x\n",
|
||
status.signature, status.tag, status.residue);
|
||
grub_dprintf ("usb", "CSW: status=0x%02x\n", status.status);
|
||
|
||
/* If phase error or not valid signature, do bulk-only reset device. */
|
||
if ((status.status == 2) ||
|
||
(status.signature != grub_cpu_to_le32(0x53425355)))
|
||
{ /* Bulk-only reset device. */
|
||
grub_dprintf ("usb", "Bulk-only reset device - bad status\n");
|
||
grub_usbms_reset (dev->dev, dev->interface);
|
||
grub_usb_clear_halt (dev->dev, dev->in->endp_addr);
|
||
grub_usb_clear_halt (dev->dev, dev->out->endp_addr);
|
||
|
||
goto retry;
|
||
}
|
||
|
||
/* If "command failed" status or data transfer failed -> error */
|
||
if ((status.status || err) && !read_write)
|
||
return grub_error (GRUB_ERR_READ_ERROR,
|
||
"error communication with USB Mass Storage device");
|
||
else if ((status.status || err) && read_write)
|
||
return grub_error (GRUB_ERR_WRITE_ERROR,
|
||
"error communication with USB Mass Storage device");
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
|
||
static grub_err_t
|
||
grub_usbms_read (struct grub_scsi *scsi, grub_size_t cmdsize, char *cmd,
|
||
grub_size_t size, char *buf)
|
||
{
|
||
return grub_usbms_transfer (scsi, cmdsize, cmd, size, buf, 0);
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_usbms_write (struct grub_scsi *scsi, grub_size_t cmdsize, char *cmd,
|
||
grub_size_t size, char *buf)
|
||
{
|
||
return grub_usbms_transfer (scsi, cmdsize, cmd, size, buf, 1);
|
||
}
|
||
|
||
static grub_err_t
|
||
grub_usbms_open (int devnum, struct grub_scsi *scsi)
|
||
{
|
||
grub_usb_poll_devices ();
|
||
|
||
if (!grub_usbms_devices[devnum])
|
||
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
|
||
"unknown USB Mass Storage device");
|
||
|
||
scsi->data = grub_usbms_devices[devnum];
|
||
scsi->luns = grub_usbms_devices[devnum]->luns;
|
||
|
||
return GRUB_ERR_NONE;
|
||
}
|
||
|
||
static struct grub_scsi_dev grub_usbms_dev =
|
||
{
|
||
.name = "usb",
|
||
.id = GRUB_SCSI_SUBSYSTEM_USBMS,
|
||
.iterate = grub_usbms_iterate,
|
||
.open = grub_usbms_open,
|
||
.read = grub_usbms_read,
|
||
.write = grub_usbms_write
|
||
};
|
||
|
||
static struct grub_usb_attach_desc attach_hook =
|
||
{
|
||
.class = GRUB_USB_CLASS_MASS_STORAGE,
|
||
.hook = grub_usbms_attach
|
||
};
|
||
|
||
GRUB_MOD_INIT(usbms)
|
||
{
|
||
grub_usb_register_attach_hook_class (&attach_hook);
|
||
grub_scsi_dev_register (&grub_usbms_dev);
|
||
}
|
||
|
||
GRUB_MOD_FINI(usbms)
|
||
{
|
||
unsigned i;
|
||
for (i = 0; i < ARRAY_SIZE (grub_usbms_devices); i++)
|
||
{
|
||
grub_usbms_devices[i]->dev->config[grub_usbms_devices[i]->config]
|
||
.interf[grub_usbms_devices[i]->interface].detach_hook = 0;
|
||
grub_usbms_devices[i]->dev->config[grub_usbms_devices[i]->config]
|
||
.interf[grub_usbms_devices[i]->interface].attached = 0;
|
||
}
|
||
grub_usb_unregister_attach_hook_class (&attach_hook);
|
||
grub_scsi_dev_unregister (&grub_usbms_dev);
|
||
}
|