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Prepare infrastructure for background USB transfers

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-08-21 16:09:43 +02:00
parent bcfa613bc4
commit 3ee4474e8d
6 changed files with 606 additions and 451 deletions
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794
bus/usb/ohci.c
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@ -652,36 +652,32 @@ grub_ohci_transaction (grub_ohci_td_t td,
td->next_td = 0;
}
struct grub_ohci_transfer_controller_data
{
grub_uint32_t tderr_phys;
grub_uint32_t td_last_phys;
grub_ohci_ed_t ed_virt;
grub_ohci_td_t td_current_virt;
grub_ohci_td_t td_head_virt;
grub_uint64_t bad_OHCI_delay;
};
static grub_usb_err_t
grub_ohci_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer, int timeout,
grub_size_t *actual)
grub_ohci_setup_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = (struct grub_ohci *) dev->data;
grub_ohci_ed_t ed_virt;
int bulk = 0;
grub_ohci_td_t td_head_virt;
grub_ohci_td_t td_current_virt;
grub_ohci_td_t td_next_virt;
grub_ohci_td_t tderr_virt = NULL;
grub_uint32_t target;
grub_uint32_t td_head_phys;
grub_uint32_t td_tail_phys;
grub_uint32_t td_last_phys;
grub_uint32_t tderr_phys = 0;
grub_uint32_t status;
grub_uint32_t control;
grub_uint8_t errcode = 0;
grub_usb_err_t err = GRUB_USB_ERR_NONE;
int i;
grub_uint64_t maxtime;
grub_uint64_t bad_OHCI_delay = 0;
int err_halt = 0;
int err_timeout = 0;
int err_unrec = 0;
grub_uint32_t intstatus;
struct grub_ohci_transfer_controller_data *cdata;
*actual = 0;
cdata = grub_zalloc (sizeof (*cdata));
if (!cdata)
return GRUB_USB_ERR_INTERNAL;
/* Pre-set target for ED - we need it to find proper ED */
/* Set the device address. */
@ -703,21 +699,23 @@ grub_ohci_transfer (grub_usb_controller_t dev,
case GRUB_USB_TRANSACTION_TYPE_CONTROL:
break;
default :
default:
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Find proper ED or add new ED */
ed_virt = grub_ohci_find_ed (o, bulk, target);
if (!ed_virt)
cdata->ed_virt = grub_ohci_find_ed (o, bulk, target);
if (!cdata->ed_virt)
{
grub_dprintf ("ohci","Fatal: No free ED !\n");
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Take pointer to first TD from ED */
td_head_phys = grub_le_to_cpu32 (ed_virt->td_head) & ~0xf;
td_tail_phys = grub_le_to_cpu32 (ed_virt->td_tail) & ~0xf;
td_head_phys = grub_le_to_cpu32 (cdata->ed_virt->td_head) & ~0xf;
td_tail_phys = grub_le_to_cpu32 (cdata->ed_virt->td_tail) & ~0xf;
/* Sanity check - td_head should be equal to td_tail */
if (td_head_phys != td_tail_phys) /* Should never happen ! */
@ -726,6 +724,7 @@ grub_ohci_transfer (grub_usb_controller_t dev,
grub_dprintf ("ohci", "HEAD = 0x%02x, TAIL = 0x%02x\n",
td_head_phys, td_tail_phys);
/* XXX: Fix: What to do ? */
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
@ -733,65 +732,64 @@ grub_ohci_transfer (grub_usb_controller_t dev,
* we must allocate the first TD. */
if (!td_head_phys)
{
td_head_virt = grub_ohci_alloc_td (o);
if (!td_head_virt)
cdata->td_head_virt = grub_ohci_alloc_td (o);
if (!cdata->td_head_virt)
return GRUB_USB_ERR_INTERNAL; /* We don't need de-allocate ED */
/* We can set td_head only when ED is not active, i.e.
* when it is newly allocated. */
ed_virt->td_head = grub_cpu_to_le32 ( grub_ohci_td_virt2phys (o,
td_head_virt) );
ed_virt->td_tail = ed_virt->td_head;
cdata->ed_virt->td_head
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, cdata->td_head_virt));
cdata->ed_virt->td_tail = cdata->ed_virt->td_head;
}
else
td_head_virt = grub_ohci_td_phys2virt ( o, td_head_phys );
cdata->td_head_virt = grub_ohci_td_phys2virt ( o, td_head_phys );
/* Set TDs */
td_last_phys = td_head_phys; /* initial value to make compiler happy... */
for (i = 0, td_current_virt = td_head_virt;
cdata->td_last_phys = td_head_phys; /* initial value to make compiler happy... */
for (i = 0, cdata->td_current_virt = cdata->td_head_virt;
i < transfer->transcnt; i++)
{
grub_usb_transaction_t tr = &transfer->transactions[i];
grub_ohci_transaction (td_current_virt, tr->pid, tr->toggle,
grub_ohci_transaction (cdata->td_current_virt, tr->pid, tr->toggle,
tr->size, tr->data);
/* Set index of TD in transfer */
td_current_virt->tr_index = (grub_uint32_t) i;
cdata->td_current_virt->tr_index = (grub_uint32_t) i;
/* No IRQ request in TD if bad_OHCI set */
if (o->bad_OHCI)
td_current_virt->token |= grub_cpu_to_le32 ( 7 << 21);
cdata->td_current_virt->token |= grub_cpu_to_le32 ( 7 << 21);
/* Remember last used (processed) TD phys. addr. */
td_last_phys = grub_ohci_td_virt2phys (o, td_current_virt);
cdata->td_last_phys = grub_ohci_td_virt2phys (o, cdata->td_current_virt);
/* Allocate next TD */
td_next_virt = grub_ohci_alloc_td (o);
if (!td_next_virt) /* No free TD, cancel transfer and free TDs except head TD */
{
if (i) /* if i==0 we have nothing to free... */
grub_ohci_free_tds (o,
grub_ohci_td_phys2virt(o,
grub_le_to_cpu32 (td_head_virt->next_td) ) );
grub_ohci_free_tds (o, grub_ohci_td_phys2virt(o,
grub_le_to_cpu32 (cdata->td_head_virt->next_td)));
/* Reset head TD */
grub_memset ( (void*)td_head_virt, 0,
grub_memset ( (void*)cdata->td_head_virt, 0,
sizeof(struct grub_ohci_td) );
grub_dprintf ("ohci", "Fatal: No free TD !");
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
/* Chain TDs */
td_current_virt->link_td = (grub_uint32_t) td_next_virt;
td_current_virt->next_td = grub_cpu_to_le32 (
grub_ohci_td_virt2phys (o,
td_next_virt) );
td_next_virt->prev_td_phys = grub_ohci_td_virt2phys (o,
td_current_virt);
td_current_virt = td_next_virt;
cdata->td_current_virt->link_td = (grub_uint32_t) td_next_virt;
cdata->td_current_virt->next_td
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, td_next_virt));
td_next_virt->prev_td_phys
= grub_ohci_td_virt2phys (o, cdata->td_current_virt);
cdata->td_current_virt = td_next_virt;
}
grub_dprintf ("ohci", "Tail TD (not processed) = %p\n",
td_current_virt);
cdata->td_current_virt);
/* Setup the Endpoint Descriptor for transfer. */
/* First set necessary fields in TARGET but keep (or set) skip bit */
@ -799,12 +797,12 @@ grub_ohci_transfer (grub_usb_controller_t dev,
* size never change after first allocation of ED.
* But unfortunately max. packet size may change during initial
* setup sequence and we must handle it. */
ed_virt->target = grub_cpu_to_le32 (target | (1 << 14));
cdata->ed_virt->target = grub_cpu_to_le32 (target | (1 << 14));
/* Set td_tail */
ed_virt->td_tail
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, td_current_virt));
cdata->ed_virt->td_tail
= grub_cpu_to_le32 (grub_ohci_td_virt2phys (o, cdata->td_current_virt));
/* Now reset skip bit */
ed_virt->target = grub_cpu_to_le32 (target);
cdata->ed_virt->target = grub_cpu_to_le32 (target);
/* ed_virt->td_head = grub_cpu_to_le32 (td_head); Must not be changed, it is maintained by OHCI */
/* ed_virt->next_ed = grub_cpu_to_le32 (0); Handled by grub_ohci_find_ed, do not change ! */
@ -834,93 +832,19 @@ grub_ohci_transfer (grub_usb_controller_t dev,
}
}
/* Safety measure to avoid a hang. */
maxtime = grub_get_time_ms () + timeout;
/* Wait until the transfer is completed or STALLs. */
do
{
/* Check transfer status */
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
if (!o->bad_OHCI && (intstatus & 0x2) != 0)
{
/* Remember last successful TD */
tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
/* Reset DoneHead */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* if TD is last, finish */
if (tderr_phys == td_last_phys)
{
if (grub_le_to_cpu32 (ed_virt->td_head) & 1)
err_halt = 1;
break;
}
continue;
}
return GRUB_USB_ERR_NONE;
}
if ((intstatus & 0x10) != 0)
{ /* Unrecoverable error - only reset can help...! */
err_unrec = 1;
break;
}
/* Detected a HALT. */
if (err_halt || (grub_le_to_cpu32 (ed_virt->td_head) & 1))
{
err_halt = 1;
/* ED is halted, but donehead event can happened in the meantime */
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
if (!o->bad_OHCI && (intstatus & 0x2) != 0)
/* Don't break loop now, first do donehead action(s) */
continue;
break;
}
/* bad OHCI handling */
if ( (grub_le_to_cpu32 (ed_virt->td_head) & ~0xf) ==
(grub_le_to_cpu32 (ed_virt->td_tail) & ~0xf) ) /* Empty ED */
{
if (o->bad_OHCI) /* Bad OHCI detected previously */
{
/* Try get last successful TD. */
tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
if (tderr_phys)/* Reset DoneHead if we were successful */
{
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
}
/* Check the HALT bit */
if (grub_le_to_cpu32 (ed_virt->td_head) & 1)
err_halt = 1;
break;
}
else /* Detection of bad OHCI */
/* We should wait short time (~2ms) before we say that
* it is bad OHCI to prevent some hazard -
* donehead can react in the meantime. This waiting is done
* only once per OHCI driver "live cycle". */
if (!bad_OHCI_delay) /* Set delay time */
bad_OHCI_delay = grub_get_time_ms () + 2;
else if (grub_get_time_ms () >= bad_OHCI_delay)
o->bad_OHCI = 1;
continue;
}
/* Timeout ? */
if (grub_get_time_ms () > maxtime)
{
err_timeout = 1;
break;
}
grub_cpu_idle ();
}
while (1);
static void
pre_finish_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_uint32_t target;
grub_uint32_t status;
grub_uint32_t control;
grub_uint32_t intstatus;
/* There are many ways how the loop above can finish:
* - normally without any error via INTSTATUS WDH bit
@ -952,8 +876,8 @@ grub_ohci_transfer (grub_usb_controller_t dev,
/* Remember target for debug and set skip flag in ED */
/* It should be normaly not necessary but we need it at least
* in case of timeout */
target = grub_le_to_cpu32 ( ed_virt->target );
ed_virt->target = grub_cpu_to_le32 (target | (1 << 14));
target = grub_le_to_cpu32 ( cdata->ed_virt->target );
cdata->ed_virt->target = grub_cpu_to_le32 (target | (1 << 14));
/* Read registers for debug - they should be read now because
* debug prints case unwanted delays, so something can happen
* in the meantime... */
@ -964,224 +888,23 @@ grub_ohci_transfer (grub_usb_controller_t dev,
grub_dprintf ("ohci", "loop finished: control=0x%02x status=0x%02x\n",
control, status);
grub_dprintf ("ohci", "intstatus=0x%02x \n\t\t tderr_phys=0x%02x, td_last_phys=0x%02x\n",
intstatus, tderr_phys, td_last_phys);
grub_dprintf ("ohci", "err_unrec=%d, err_timeout=%d \n\t\t err_halt=%d, bad_OHCI=%d\n",
err_unrec, err_timeout, err_halt, o->bad_OHCI);
intstatus, cdata->tderr_phys, cdata->td_last_phys);
grub_dprintf ("ohci", "TARGET=0x%02x, HEAD=0x%02x, TAIL=0x%02x\n",
target,
grub_le_to_cpu32 (ed_virt->td_head),
grub_le_to_cpu32 (ed_virt->td_tail) );
grub_le_to_cpu32 (cdata->ed_virt->td_head),
grub_le_to_cpu32 (cdata->ed_virt->td_tail) );
if (!err_halt && !err_unrec && !err_timeout) /* normal finish */
{
/* Simple workaround if donehead is not working */
if (o->bad_OHCI &&
( !tderr_phys || (tderr_phys != td_last_phys) ) )
{
grub_dprintf ("ohci", "normal finish, but tderr_phys corrected\n");
tderr_phys = td_last_phys;
/* I hope we can do it as transfer (most probably) finished OK */
}
/* Prepare pointer to last processed TD */
tderr_virt = grub_ohci_td_phys2virt (o, tderr_phys);
/* Set index of last processed TD */
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
transfer->last_trans = -1;
*actual = transfer->size + 1;
}
}
else if (err_halt) /* error, ED is halted by OHCI, i.e. can be modified */
{
/* First we must get proper tderr_phys value */
if (o->bad_OHCI) /* In case of bad_OHCI tderr_phys can be wrong */
{
if ( tderr_phys ) /* check if tderr_phys points to TD with error */
errcode = grub_le_to_cpu32 ( grub_ohci_td_phys2virt (o,
tderr_phys)->token )
>> 28;
if ( !tderr_phys || !errcode ) /* tderr_phys not valid or points to wrong TD */
{ /* Retired TD with error should be previous TD to ED->td_head */
tderr_phys = grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 ( ed_virt->td_head) & ~0xf )
->prev_td_phys;
}
}
/* Even if we have "good" OHCI, in some cases
* tderr_phys can be zero, check it */
else if ( !tderr_phys )
{ /* Retired TD with error should be previous TD to ED->td_head */
tderr_phys = grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 ( ed_virt->td_head) & ~0xf )
->prev_td_phys;
}
/* Prepare pointer to last processed TD and get error code */
tderr_virt = grub_ohci_td_phys2virt (o, tderr_phys);
/* Set index of last processed TD */
if (tderr_virt)
{
errcode = grub_le_to_cpu32 ( tderr_virt->token ) >> 28;
transfer->last_trans = tderr_virt->tr_index;
}
else
transfer->last_trans = -1;
/* Evaluation of error code */
grub_dprintf ("ohci", "OHCI tderr_phys=0x%02x, errcode=0x%02x\n",
tderr_phys, errcode);
switch (errcode)
{
case 0:
/* XXX: Should not happen! */
grub_error (GRUB_ERR_IO, "OHCI failed without reporting the reason");
err = GRUB_USB_ERR_INTERNAL;
break;
case 1:
/* XXX: CRC error. */
err = GRUB_USB_ERR_TIMEOUT;
break;
case 2:
err = GRUB_USB_ERR_BITSTUFF;
break;
case 3:
/* XXX: Data Toggle error. */
err = GRUB_USB_ERR_DATA;
break;
case 4:
err = GRUB_USB_ERR_STALL;
break;
case 5:
/* XXX: Not responding. */
err = GRUB_USB_ERR_TIMEOUT;
break;
case 6:
/* XXX: PID Check bits failed. */
err = GRUB_USB_ERR_BABBLE;
break;
case 7:
/* XXX: PID unexpected failed. */
err = GRUB_USB_ERR_BABBLE;
break;
case 8:
/* XXX: Data overrun error. */
err = GRUB_USB_ERR_DATA;
grub_dprintf ("ohci", "Overrun, failed TD address: %p, index: %d\n",
tderr_virt, tderr_virt->tr_index);
break;
case 9:
/* XXX: Data underrun error. */
grub_dprintf ("ohci", "Underrun, failed TD address: %p, index: %d\n",
tderr_virt, tderr_virt->tr_index);
if (transfer->last_trans == -1)
break;
*actual = transfer->transactions[transfer->last_trans].size
- (grub_le_to_cpu32 (tderr_virt->buffer_end)
- grub_le_to_cpu32 (tderr_virt->buffer))
+ transfer->transactions[transfer->last_trans].preceding;
break;
case 10:
/* XXX: Reserved. */
err = GRUB_USB_ERR_NAK;
break;
case 11:
/* XXX: Reserved. */
err = GRUB_USB_ERR_NAK;
break;
case 12:
/* XXX: Buffer overrun. */
err = GRUB_USB_ERR_DATA;
break;
case 13:
/* XXX: Buffer underrun. */
err = GRUB_USB_ERR_DATA;
break;
default:
err = GRUB_USB_ERR_NAK;
break;
}
}
else if (err_unrec)
{
/* Don't try to get error code and last processed TD for proper
* toggle bit value - anything can be invalid */
err = GRUB_USB_ERR_UNRECOVERABLE;
grub_dprintf("ohci", "Unrecoverable error!");
/* Do OHCI reset in case of unrecoverable error - maybe we will need
* do more - re-enumerate bus etc. (?) */
/* Suspend the OHCI by issuing a reset. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1); /* XXX: Magic. */
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_CMDSTATUS);
grub_millisleep (1);
grub_dprintf ("ohci", "Unrecoverable error - OHCI reset\n");
/* Misc. resets. */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, 0x7f); /* Clears everything */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLHEAD, o->ed_ctrl_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKHEAD, o->ed_bulk_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKCURR, 0);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Enable the OHCI. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL,
(2 << 6)
| GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE
| GRUB_OHCI_REG_CONTROL_BULK_ENABLE );
}
else if (err_timeout)
{
/* In case of timeout do not detect error from TD */
err = GRUB_ERR_TIMEOUT;
grub_dprintf("ohci", "Timeout !\n");
/* We should wait for next SOF to be sure that ED is unaccessed
* by OHCI */
/* SF bit reset. (SF bit indicates Start Of Frame (SOF) packet) */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1<<2));
/* Wait for new SOF */
while ((grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS) & 0x4) == 0);
/* Now we must find last processed TD if bad_OHCI == TRUE */
if (o->bad_OHCI)
{ /* Retired TD with error should be previous TD to ED->td_head */
tderr_phys = grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 ( ed_virt->td_head) & ~0xf)
->prev_td_phys;
}
tderr_virt = grub_ohci_td_phys2virt (o, tderr_phys);
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
transfer->last_trans = -1;
}
static void
finish_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
/* Set empty ED - set HEAD = TAIL = last (not processed) TD */
ed_virt->td_head = grub_cpu_to_le32 (grub_le_to_cpu32 (ed_virt->td_tail) & ~0xf);
cdata->ed_virt->td_head = grub_cpu_to_le32 (grub_le_to_cpu32 (cdata->ed_virt->td_tail) & ~0xf);
/* At this point always should be:
* ED has skip bit set and halted or empty or after next SOF,
@ -1195,23 +918,368 @@ grub_ohci_transfer (grub_usb_controller_t dev,
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Un-chainig of last TD */
if (td_current_virt->prev_td_phys)
if (cdata->td_current_virt->prev_td_phys)
{
grub_ohci_td_t td_prev_virt
= grub_ohci_td_phys2virt (o, td_current_virt->prev_td_phys);
td_next_virt = (grub_ohci_td_t) td_prev_virt->link_td;
if (td_current_virt == td_next_virt)
= grub_ohci_td_phys2virt (o, cdata->td_current_virt->prev_td_phys);
if (cdata->td_current_virt == (grub_ohci_td_t) td_prev_virt->link_td)
td_prev_virt->link_td = 0;
}
grub_dprintf ("ohci", "OHCI finished, freeing, err=0x%02x, errcode=0x%02x\n",
err, errcode);
grub_ohci_free_tds (o, td_head_virt);
grub_dprintf ("ohci", "OHCI finished, freeing\n");
grub_ohci_free_tds (o, cdata->td_head_virt);
}
static grub_usb_err_t
parse_halt (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_uint8_t errcode = 0;
grub_usb_err_t err = GRUB_USB_ERR_NAK;
grub_ohci_td_t tderr_virt = NULL;
*actual = 0;
pre_finish_transfer (dev, transfer);
/* First we must get proper tderr_phys value */
if (o->bad_OHCI) /* In case of bad_OHCI tderr_phys can be wrong */
{
if (cdata->tderr_phys) /* check if tderr_phys points to TD with error */
errcode = grub_le_to_cpu32 (grub_ohci_td_phys2virt (o,
cdata->tderr_phys)->token)
>> 28;
if ( !cdata->tderr_phys || !errcode ) /* tderr_phys not valid or points to wrong TD */
{ /* Retired TD with error should be previous TD to ED->td_head */
cdata->tderr_phys = grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 (cdata->ed_virt->td_head) & ~0xf )
->prev_td_phys;
}
}
/* Even if we have "good" OHCI, in some cases
* tderr_phys can be zero, check it */
else if (!cdata->tderr_phys)
/* Retired TD with error should be previous TD to ED->td_head */
cdata->tderr_phys
= grub_ohci_td_phys2virt (o,
grub_le_to_cpu32 (cdata->ed_virt->td_head)
& ~0xf)->prev_td_phys;
/* Prepare pointer to last processed TD and get error code */
tderr_virt = grub_ohci_td_phys2virt (o, cdata->tderr_phys);
/* Set index of last processed TD */
if (tderr_virt)
{
errcode = grub_le_to_cpu32 (tderr_virt->token) >> 28;
transfer->last_trans = tderr_virt->tr_index;
}
else
transfer->last_trans = -1;
/* Evaluation of error code */
grub_dprintf ("ohci", "OHCI tderr_phys=0x%02x, errcode=0x%02x\n",
cdata->tderr_phys, errcode);
switch (errcode)
{
case 0:
/* XXX: Should not happen! */
grub_error (GRUB_ERR_IO, "OHCI failed without reporting the reason");
err = GRUB_USB_ERR_INTERNAL;
break;
case 1:
/* XXX: CRC error. */
err = GRUB_USB_ERR_TIMEOUT;
break;
case 2:
err = GRUB_USB_ERR_BITSTUFF;
break;
case 3:
/* XXX: Data Toggle error. */
err = GRUB_USB_ERR_DATA;
break;
case 4:
err = GRUB_USB_ERR_STALL;
break;
case 5:
/* XXX: Not responding. */
err = GRUB_USB_ERR_TIMEOUT;
break;
case 6:
/* XXX: PID Check bits failed. */
err = GRUB_USB_ERR_BABBLE;
break;
case 7:
/* XXX: PID unexpected failed. */
err = GRUB_USB_ERR_BABBLE;
break;
case 8:
/* XXX: Data overrun error. */
err = GRUB_USB_ERR_DATA;
grub_dprintf ("ohci", "Overrun, failed TD address: %p, index: %d\n",
tderr_virt, tderr_virt->tr_index);
break;
case 9:
/* XXX: Data underrun error. */
grub_dprintf ("ohci", "Underrun, failed TD address: %p, index: %d\n",
tderr_virt, tderr_virt->tr_index);
if (transfer->last_trans == -1)
break;
*actual = transfer->transactions[transfer->last_trans].size
- (grub_le_to_cpu32 (tderr_virt->buffer_end)
- grub_le_to_cpu32 (tderr_virt->buffer))
+ transfer->transactions[transfer->last_trans].preceding;
err = GRUB_USB_ERR_NONE;
break;
case 10:
/* XXX: Reserved. */
err = GRUB_USB_ERR_NAK;
break;
case 11:
/* XXX: Reserved. */
err = GRUB_USB_ERR_NAK;
break;
case 12:
/* XXX: Buffer overrun. */
err = GRUB_USB_ERR_DATA;
break;
case 13:
/* XXX: Buffer underrun. */
err = GRUB_USB_ERR_DATA;
break;
default:
err = GRUB_USB_ERR_NAK;
break;
}
finish_transfer (dev, transfer);
return err;
}
static grub_usb_err_t
parse_success (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_ohci_td_t tderr_virt = NULL;
pre_finish_transfer (dev, transfer);
/* Simple workaround if donehead is not working */
if (o->bad_OHCI &&
(!cdata->tderr_phys || (cdata->tderr_phys != cdata->td_last_phys)))
{
grub_dprintf ("ohci", "normal finish, but tderr_phys corrected\n");
cdata->tderr_phys = cdata->td_last_phys;
/* I hope we can do it as transfer (most probably) finished OK */
}
/* Prepare pointer to last processed TD */
tderr_virt = grub_ohci_td_phys2virt (o, cdata->tderr_phys);
/* Set index of last processed TD */
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
transfer->last_trans = -1;
*actual = transfer->size + 1;
finish_transfer (dev, transfer);
return GRUB_USB_ERR_NONE;
}
static grub_usb_err_t
parse_unrec (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
*actual = 0;
pre_finish_transfer (dev, transfer);
/* Don't try to get error code and last processed TD for proper
* toggle bit value - anything can be invalid */
grub_dprintf("ohci", "Unrecoverable error!");
/* Do OHCI reset in case of unrecoverable error - maybe we will need
* do more - re-enumerate bus etc. (?) */
/* Suspend the OHCI by issuing a reset. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CMDSTATUS, 1); /* XXX: Magic. */
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_CMDSTATUS);
grub_millisleep (1);
grub_dprintf ("ohci", "Unrecoverable error - OHCI reset\n");
/* Misc. resets. */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, 0x7f); /* Clears everything */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLHEAD, o->ed_ctrl_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROLCURR, 0);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKHEAD, o->ed_bulk_addr);
grub_ohci_writereg32 (o, GRUB_OHCI_REG_BULKCURR, 0);
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* Enable the OHCI. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_CONTROL,
(2 << 6)
| GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE
| GRUB_OHCI_REG_CONTROL_BULK_ENABLE );
finish_transfer (dev, transfer);
return GRUB_USB_ERR_UNRECOVERABLE;
}
static grub_usb_err_t
grub_ohci_check_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_uint32_t intstatus;
/* Check transfer status */
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
if (!o->bad_OHCI && (intstatus & 0x2) != 0)
{
/* Remember last successful TD */
cdata->tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
/* Reset DoneHead */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* if TD is last, finish */
if (cdata->tderr_phys == cdata->td_last_phys)
{
if (grub_le_to_cpu32 (cdata->ed_virt->td_head) & 1)
return parse_halt (dev, transfer, actual);
else
return parse_success (dev, transfer, actual);
}
return GRUB_USB_ERR_WAIT;
}
if ((intstatus & 0x10) != 0)
/* Unrecoverable error - only reset can help...! */
return parse_unrec (dev, transfer, actual);
/* Detected a HALT. */
if ((grub_le_to_cpu32 (cdata->ed_virt->td_head) & 1))
{
/* ED is halted, but donehead event can happened in the meantime */
intstatus = grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
if (!o->bad_OHCI && (intstatus & 0x2) != 0)
{
/* Remember last successful TD */
cdata->tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
/* Reset DoneHead */
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
/* if TD is last, finish */
}
return parse_halt (dev, transfer, actual);
}
/* bad OHCI handling */
if ( (grub_le_to_cpu32 (cdata->ed_virt->td_head) & ~0xf) ==
(grub_le_to_cpu32 (cdata->ed_virt->td_tail) & ~0xf) ) /* Empty ED */
{
if (o->bad_OHCI) /* Bad OHCI detected previously */
{
/* Try get last successful TD. */
cdata->tderr_phys = grub_le_to_cpu32 (o->hcca->donehead) & ~0xf;
if (cdata->tderr_phys)/* Reset DoneHead if we were successful */
{
o->hcca->donehead = 0;
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1 << 1));
/* Read back of register should ensure it is really written */
grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS);
}
/* Check the HALT bit */
if (grub_le_to_cpu32 (cdata->ed_virt->td_head) & 1)
return parse_halt (dev, transfer, actual);
else
return parse_success (dev, transfer, actual);
}
else /* Detection of bad OHCI */
/* We should wait short time (~2ms) before we say that
* it is bad OHCI to prevent some hazard -
* donehead can react in the meantime. This waiting is done
* only once per OHCI driver "live cycle". */
if (!cdata->bad_OHCI_delay) /* Set delay time */
cdata->bad_OHCI_delay = grub_get_time_ms () + 2;
else if (grub_get_time_ms () >= cdata->bad_OHCI_delay)
o->bad_OHCI = 1;
return GRUB_USB_ERR_WAIT;
}
return GRUB_USB_ERR_WAIT;
}
static grub_usb_err_t
grub_ohci_cancel_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_ohci *o = dev->data;
struct grub_ohci_transfer_controller_data *cdata = transfer->controller_data;
grub_ohci_td_t tderr_virt = NULL;
pre_finish_transfer (dev, transfer);
grub_dprintf("ohci", "Timeout !\n");
/* We should wait for next SOF to be sure that ED is unaccessed
* by OHCI */
/* SF bit reset. (SF bit indicates Start Of Frame (SOF) packet) */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_INTSTATUS, (1<<2));
/* Wait for new SOF */
while ((grub_ohci_readreg32 (o, GRUB_OHCI_REG_INTSTATUS) & 0x4) == 0);
/* Now we must find last processed TD if bad_OHCI == TRUE */
if (o->bad_OHCI)
/* Retired TD with error should be previous TD to ED->td_head */
cdata->tderr_phys
= grub_ohci_td_phys2virt (o, grub_le_to_cpu32 (cdata->ed_virt->td_head)
& ~0xf)->prev_td_phys;
tderr_virt = grub_ohci_td_phys2virt (o,cdata-> tderr_phys);
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
transfer->last_trans = -1;
finish_transfer (dev, transfer);
return GRUB_USB_ERR_NONE;
}
static grub_err_t
grub_ohci_portstatus (grub_usb_controller_t dev,
unsigned int port, unsigned int enable)
@ -1398,7 +1466,9 @@ static struct grub_usb_controller_dev usb_controller =
{
.name = "ohci",
.iterate = grub_ohci_iterate,
.transfer = grub_ohci_transfer,
.setup_transfer = grub_ohci_setup_transfer,
.check_transfer = grub_ohci_check_transfer,
.cancel_transfer = grub_ohci_cancel_transfer,
.hubports = grub_ohci_hubports,
.portstatus = grub_ohci_portstatus,
.detect_dev = grub_ohci_detect_dev

205
bus/usb/uhci.c
View file

@ -438,26 +438,35 @@ grub_uhci_transaction (struct grub_uhci *u, unsigned int endp,
return td;
}
struct grub_uhci_transfer_controller_data
{
grub_uhci_qh_t qh;
grub_uhci_td_t td_first;
};
static grub_usb_err_t
grub_uhci_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
int timeout, grub_size_t *actual)
grub_uhci_setup_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_uhci *u = (struct grub_uhci *) dev->data;
grub_uhci_qh_t qh;
grub_uhci_td_t td;
grub_uhci_td_t td_first = NULL;
grub_uhci_td_t td_prev = NULL;
grub_usb_err_t err = GRUB_USB_ERR_NONE;
int i;
grub_uint64_t endtime;
struct grub_uhci_transfer_controller_data *cdata;
*actual = 0;
cdata = grub_malloc (sizeof (*cdata));
if (!cdata)
return GRUB_USB_ERR_INTERNAL;
cdata->td_first = NULL;
/* Allocate a queue head for the transfer queue. */
qh = grub_alloc_qh (u, GRUB_USB_TRANSACTION_TYPE_CONTROL);
if (! qh)
return GRUB_USB_ERR_INTERNAL;
cdata->qh = grub_alloc_qh (u, GRUB_USB_TRANSACTION_TYPE_CONTROL);
if (! cdata->qh)
{
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
grub_dprintf ("uhci", "transfer, iobase:%08x\n", u->iobase);
@ -470,18 +479,20 @@ grub_uhci_transfer (grub_usb_controller_t dev,
tr->size, tr->data);
if (! td)
{
grub_size_t actual = 0;
/* Terminate and free. */
td_prev->linkptr2 = 0;
td_prev->linkptr = 1;
if (td_first)
grub_free_queue (u, td_first, NULL, actual);
if (cdata->td_first)
grub_free_queue (u, cdata->td_first, NULL, &actual);
grub_free (cdata);
return GRUB_USB_ERR_INTERNAL;
}
if (! td_first)
td_first = td;
if (! cdata->td_first)
cdata->td_first = td;
else
{
td_prev->linkptr2 = (grub_uint32_t) td;
@ -497,82 +508,112 @@ grub_uhci_transfer (grub_usb_controller_t dev,
/* Link it into the queue and terminate. Now the transaction can
take place. */
qh->elinkptr = (grub_uint32_t) td_first;
cdata->qh->elinkptr = (grub_uint32_t) cdata->td_first;
grub_dprintf ("uhci", "initiate transaction\n");
/* Wait until either the transaction completed or an error
occurred. */
endtime = grub_get_time_ms () + timeout;
for (;;)
transfer->controller_data = cdata;
return GRUB_USB_ERR_NONE;
}
static grub_usb_err_t
grub_uhci_check_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual)
{
struct grub_uhci *u = (struct grub_uhci *) dev->data;
grub_uhci_td_t errtd;
struct grub_uhci_transfer_controller_data *cdata = transfer->controller_data;
*actual = 0;
errtd = (grub_uhci_td_t) (cdata->qh->elinkptr & ~0x0f);
grub_dprintf ("uhci", ">t status=0x%02x data=0x%02x td=%p\n",
errtd->ctrl_status, errtd->buffer & (~15), errtd);
/* Check if the transaction completed. */
if (cdata->qh->elinkptr & 1)
{
grub_uhci_td_t errtd;
grub_dprintf ("uhci", "transaction complete\n");
errtd = (grub_uhci_td_t) (qh->elinkptr & ~0x0f);
grub_dprintf ("uhci", ">t status=0x%02x data=0x%02x td=%p\n",
errtd->ctrl_status, errtd->buffer & (~15), errtd);
/* Check if the transaction completed. */
if (qh->elinkptr & 1)
break;
grub_dprintf ("uhci", "t status=0x%02x\n", errtd->ctrl_status);
if (!(errtd->ctrl_status & (1 << 23)))
{
/* Check if the endpoint is stalled. */
if (errtd->ctrl_status & (1 << 22))
err = GRUB_USB_ERR_STALL;
/* Check if an error related to the data buffer occurred. */
if (errtd->ctrl_status & (1 << 21))
err = GRUB_USB_ERR_DATA;
/* Check if a babble error occurred. */
if (errtd->ctrl_status & (1 << 20))
err = GRUB_USB_ERR_BABBLE;
/* Check if a NAK occurred. */
if (errtd->ctrl_status & (1 << 19))
err = GRUB_USB_ERR_NAK;
/* Check if a timeout occurred. */
if (errtd->ctrl_status & (1 << 18))
err = GRUB_USB_ERR_TIMEOUT;
/* Check if a bitstuff error occurred. */
if (errtd->ctrl_status & (1 << 17))
err = GRUB_USB_ERR_BITSTUFF;
if (err)
break;
}
/* Fall through, no errors occurred, so the QH might be
updated. */
grub_dprintf ("uhci", "transaction fallthrough\n");
if (grub_get_time_ms () > endtime)
{
err = GRUB_USB_ERR_STALL;
grub_dprintf ("uhci", "transaction timed out\n");
break;
}
grub_cpu_idle ();
/* Place the QH back in the free list and deallocate the associated
TDs. */
cdata->qh->elinkptr = 1;
grub_free_queue (u, cdata->td_first, transfer, actual);
grub_free (cdata);
return GRUB_USB_ERR_NONE;
}
if (err != GRUB_USB_ERR_NONE)
grub_dprintf ("uhci", "transaction failed\n");
else
grub_dprintf ("uhci", "transaction complete\n");
grub_dprintf ("uhci", "t status=0x%02x\n", errtd->ctrl_status);
if (!(errtd->ctrl_status & (1 << 23)))
{
grub_usb_err_t err = GRUB_USB_ERR_NONE;
/* Check if the endpoint is stalled. */
if (errtd->ctrl_status & (1 << 22))
err = GRUB_USB_ERR_STALL;
/* Check if an error related to the data buffer occurred. */
if (errtd->ctrl_status & (1 << 21))
err = GRUB_USB_ERR_DATA;
/* Check if a babble error occurred. */
if (errtd->ctrl_status & (1 << 20))
err = GRUB_USB_ERR_BABBLE;
/* Check if a NAK occurred. */
if (errtd->ctrl_status & (1 << 19))
err = GRUB_USB_ERR_NAK;
/* Check if a timeout occurred. */
if (errtd->ctrl_status & (1 << 18))
err = GRUB_USB_ERR_TIMEOUT;
/* Check if a bitstuff error occurred. */
if (errtd->ctrl_status & (1 << 17))
err = GRUB_USB_ERR_BITSTUFF;
if (err)
{
grub_dprintf ("uhci", "transaction failed\n");
/* Place the QH back in the free list and deallocate the associated
TDs. */
cdata->qh->elinkptr = 1;
grub_free_queue (u, cdata->td_first, transfer, actual);
grub_free (cdata);
return err;
}
}
/* Fall through, no errors occurred, so the QH might be
updated. */
grub_dprintf ("uhci", "transaction fallthrough\n");
return GRUB_USB_ERR_WAIT;
}
static grub_usb_err_t
grub_uhci_cancel_transfer (grub_usb_controller_t dev,
grub_usb_transfer_t transfer)
{
struct grub_uhci *u = (struct grub_uhci *) dev->data;
grub_size_t actual;
struct grub_uhci_transfer_controller_data *cdata = transfer->controller_data;
grub_dprintf ("uhci", "transaction cancel\n");
/* Place the QH back in the free list and deallocate the associated
TDs. */
qh->elinkptr = 1;
grub_free_queue (u, td_first, transfer, actual);
cdata->qh->elinkptr = 1;
grub_free_queue (u, cdata->td_first, transfer, &actual);
grub_free (cdata);
return err;
return GRUB_USB_ERR_NONE;
}
static int
@ -706,7 +747,9 @@ static struct grub_usb_controller_dev usb_controller =
{
.name = "uhci",
.iterate = grub_uhci_iterate,
.transfer = grub_uhci_transfer,
.setup_transfer = grub_uhci_setup_transfer,
.check_transfer = grub_uhci_check_transfer,
.cancel_transfer = grub_uhci_cancel_transfer,
.hubports = grub_uhci_hubports,
.portstatus = grub_uhci_portstatus,
.detect_dev = grub_uhci_detect_dev

2
bus/usb/usb.c
View file

@ -338,7 +338,7 @@ grub_usb_unregister_attach_hook_class (struct grub_usb_attach_desc *desc)
GRUB_MOD_INIT(usb)
{
grub_term_poll_usb = grub_usb_poll_devices;
// grub_term_poll_usb = grub_usb_poll_devices;
}
GRUB_MOD_FINI(usb)

40
bus/usb/usbtrans.c
View file

@ -23,6 +23,39 @@
#include <grub/misc.h>
#include <grub/usb.h>
#include <grub/usbtrans.h>
#include <grub/time.h>
static grub_usb_err_t
grub_usb_execute_and_wait_transfer (grub_usb_device_t dev,
grub_usb_transfer_t transfer,
int timeout, grub_size_t *actual)
{
grub_usb_err_t err;
grub_uint64_t endtime;
endtime = grub_get_time_ms () + timeout;
err = dev->controller.dev->setup_transfer (&dev->controller, transfer);
if (err)
return err;
while (1)
{
err = dev->controller.dev->check_transfer (&dev->controller, transfer,
actual);
if (!err)
return GRUB_USB_ERR_NONE;
if (err != GRUB_USB_ERR_WAIT)
return err;
if (grub_get_time_ms () > endtime)
{
err = dev->controller.dev->cancel_transfer (&dev->controller,
transfer);
if (err)
return err;
return GRUB_USB_ERR_TIMEOUT;
}
grub_cpu_idle ();
}
}
grub_usb_err_t
grub_usb_control_msg (grub_usb_device_t dev,
@ -147,8 +180,8 @@ grub_usb_control_msg (grub_usb_device_t dev,
transfer->transactions[datablocks + 1].toggle = 1;
err = dev->controller.dev->transfer (&dev->controller, transfer,
1000, &actual);
err = grub_usb_execute_and_wait_transfer (dev, transfer, 1000, &actual);
grub_dprintf ("usb", "control: err=%d\n", err);
grub_free (transfer->transactions);
@ -248,8 +281,7 @@ grub_usb_bulk_readwrite (grub_usb_device_t dev,
size -= tr->size;
}
err = dev->controller.dev->transfer (&dev->controller, transfer, timeout,
actual);
err = grub_usb_execute_and_wait_transfer (dev, transfer, timeout, actual);
/* We must remember proper toggle value even if some transactions
* were not processed - correct value should be inversion of last
* processed transaction (TD). */

14
include/grub/usb.h
View file

@ -30,6 +30,7 @@ typedef struct grub_usb_controller_dev *grub_usb_controller_dev_t;
typedef enum
{
GRUB_USB_ERR_NONE,
GRUB_USB_ERR_WAIT,
GRUB_USB_ERR_INTERNAL,
GRUB_USB_ERR_STALL,
GRUB_USB_ERR_DATA,
@ -97,6 +98,7 @@ grub_usb_err_t
grub_usb_root_hub (grub_usb_controller_t controller);
/* XXX: All handled by libusb for now. */
struct grub_usb_controller_dev
{
@ -105,9 +107,15 @@ struct grub_usb_controller_dev
int (*iterate) (int (*hook) (grub_usb_controller_t dev));
grub_usb_err_t (*transfer) (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
int timeout, grub_size_t *actual);
grub_usb_err_t (*setup_transfer) (grub_usb_controller_t dev,
grub_usb_transfer_t transfer);
grub_usb_err_t (*check_transfer) (grub_usb_controller_t dev,
grub_usb_transfer_t transfer,
grub_size_t *actual);
grub_usb_err_t (*cancel_transfer) (grub_usb_controller_t dev,
grub_usb_transfer_t transfer);
int (*hubports) (grub_usb_controller_t dev);

2
include/grub/usbtrans.h
View file

@ -62,6 +62,8 @@ struct grub_usb_transfer
int last_trans;
/* Index of last processed transaction in OHCI/UHCI driver. */
void *controller_data;
};
typedef struct grub_usb_transfer *grub_usb_transfer_t;