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Fix multiple USB issues

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This commit is contained in:
Aleš Nesrsta 2010-09-18 13:49:15 +02:00 committed by Vladimir 'phcoder' Serbinenko
parent b9c7e9d400
commit e70a1b9535
6 changed files with 195 additions and 160 deletions
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194
grub-core/bus/usb/ohci.c
View file

@ -98,7 +98,6 @@ struct grub_ohci
struct grub_pci_dma_chunk *td_chunk;
struct grub_ohci *next;
grub_ohci_td_t td_free; /* Pointer to first free TD */
int bad_OHCI;
};
static struct grub_ohci *ohci;
@ -149,8 +148,8 @@ typedef enum
#define GRUB_OHCI_REG_CONTROL_CONTROL_ENABLE (1 << 4)
#define GRUB_OHCI_RESET_CONNECT_CHANGE (1 << 16)
#define GRUB_OHCI_CTRL_EDS 16
#define GRUB_OHCI_BULK_EDS 16
#define GRUB_OHCI_CTRL_EDS 256
#define GRUB_OHCI_BULK_EDS 510
#define GRUB_OHCI_TDS 256
#define GRUB_OHCI_ED_ADDR_MASK 0x7ff
@ -442,8 +441,10 @@ grub_ohci_pci_iter (grub_pci_device_t dev,
(grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBA)
& ~GRUB_OHCI_RHUB_PORT_POWER_MASK)
| GRUB_OHCI_RHUB_PORT_ALL_POWERED);
#if 0 /* We don't need it at all, handled via hotplugging */
/* Now we have hot-plugging, we need to wait for stable power only */
grub_millisleep (100);
#endif
/* Link to ohci now that initialisation is successful. */
o->next = ohci;
@ -623,7 +624,8 @@ grub_ohci_transaction (grub_ohci_td_t td,
break;
}
/* Set the token (Always generate interrupt - bits 21-23 = 0). */
/* Set the token */
token |= ( 7 << 21); /* Never generate interrupt */
token |= toggle << 24;
token |= 1 << 25;
@ -659,7 +661,6 @@ struct grub_ohci_transfer_controller_data
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
@ -756,10 +757,6 @@ grub_ohci_setup_transfer (grub_usb_controller_t dev,
/* Set index of TD in transfer */
cdata->td_current_virt->tr_index = (grub_uint32_t) i;
/* No IRQ request in TD if bad_OHCI set */
if (o->bad_OHCI)
cdata->td_current_virt->token |= grub_cpu_to_le32 ( 7 << 21);
/* Remember last used (processed) TD phys. addr. */
cdata->td_last_phys = grub_ohci_td_virt2phys (o, cdata->td_current_virt);
@ -891,8 +888,8 @@ pre_finish_transfer (grub_usb_controller_t dev,
/* Now print debug values - to have full info what happened */
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, cdata->tderr_phys, cdata->td_last_phys);
grub_dprintf ("ohci", "intstatus=0x%02x, td_last_phys=0x%02x\n",
intstatus, cdata->td_last_phys);
grub_dprintf ("ohci", "TARGET=0x%02x, HEAD=0x%02x, TAIL=0x%02x\n",
target,
grub_le_to_cpu32 (cdata->ed_virt->td_head),
@ -915,12 +912,6 @@ finish_transfer (grub_usb_controller_t dev,
* i.e. it is safe to free all TDs except last not processed
* ED HEAD == TAIL == phys. addr. of td_current_virt */
/* Reset DoneHead - sanity cleanup */
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);
/* Un-chainig of last TD */
if (cdata->td_current_virt->prev_td_phys)
{
@ -929,10 +920,13 @@ finish_transfer (grub_usb_controller_t dev,
if (cdata->td_current_virt == (grub_ohci_td_t) td_prev_virt->link_td)
td_prev_virt->link_td = 0;
cdata->td_current_virt->prev_td_phys = 0;
}
grub_dprintf ("ohci", "OHCI finished, freeing\n");
grub_ohci_free_tds (o, cdata->td_head_virt);
grub_free (cdata);
}
static grub_usb_err_t
@ -951,28 +945,10 @@ parse_halt (grub_usb_controller_t dev,
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;
/* 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);
@ -1090,16 +1066,12 @@ parse_success (grub_usb_controller_t dev,
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 */
}
/* I hope we can do it as transfer (most probably) finished OK */
cdata->tderr_phys = cdata->td_last_phys;
/* 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;
@ -1168,25 +1140,6 @@ grub_ohci_check_transfer (grub_usb_controller_t dev,
/* 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...! */
@ -1194,54 +1147,20 @@ grub_ohci_check_transfer (grub_usb_controller_t dev,
/* 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);
}
return parse_halt (dev, transfer, actual);
/* bad OHCI handling */
/* Finished ED detection */
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;
/* Check the HALT bit */
/* It looks like nonsense - it was tested previously...
* but it can change because OHCI is working
* simultaneously via DMA... */
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;
@ -1266,14 +1185,16 @@ grub_ohci_cancel_transfer (grub_usb_controller_t dev,
/* 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;
/* Possible 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);
grub_dprintf ("ohci", "Cancel: tderr_phys=0x%08x, tderr_virt=0x%08x\n",
cdata->tderr_phys, (unsigned int)tderr_virt);
if (tderr_virt)
transfer->last_trans = tderr_virt->tr_index;
else
@ -1290,6 +1211,7 @@ grub_ohci_portstatus (grub_usb_controller_t dev,
{
struct grub_ohci *o = (struct grub_ohci *) dev->data;
grub_uint64_t endtime;
int i;
grub_dprintf ("ohci", "begin of portstatus=0x%02x\n",
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port));
@ -1310,31 +1232,47 @@ grub_ohci_portstatus (grub_usb_controller_t dev,
return GRUB_ERR_NONE;
}
/* Reset the port */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_RESET);
grub_millisleep (50); /* For root hub should be nominaly 50ms */
/* End the reset signaling. */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_RESET_STATUS_CHANGE);
grub_millisleep (10);
/* OHCI does one reset signal 10ms long but USB spec.
* requests 50ms for root hub (no need to be continuous).
* So, we do reset 5 times... */
for (i = 0; i < 5; i++)
{
/* Reset the port - timing of reset is done by OHCI */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_RESET);
/* Enable the port and wait for it. */
/* Wait for reset completion */
endtime = grub_get_time_ms () + 1000;
while (! (grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port)
& GRUB_OHCI_SET_PORT_RESET_STATUS_CHANGE))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "OHCI Timed out - reset");
/* End the reset signaling - reset the reset status change */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_RESET_STATUS_CHANGE);
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port);
}
/* Enable port */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_SET_PORT_ENABLE);
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port);
/* Wait for signal enabled */
endtime = grub_get_time_ms () + 1000;
while (! (grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port)
& (1 << 1)))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "OHCI Timed out - enable");
grub_millisleep (10);
/* Reset bit Connect Status Change */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_RESET_CONNECT_CHANGE);
/* "Reset recovery time" (USB spec.) */
grub_millisleep (10);
grub_dprintf ("ohci", "end of portstatus=0x%02x\n",
grub_ohci_readreg32 (o, GRUB_OHCI_REG_RHUBPORT + port));

48
grub-core/bus/usb/uhci.c
View file

@ -50,9 +50,12 @@ enum
GRUB_UHCI_REG_PORTSC_SUSPEND = 0x1000,
GRUB_UHCI_REG_PORTSC_RW = GRUB_UHCI_REG_PORTSC_PORT_ENABLED
| GRUB_UHCI_REG_PORTSC_RESUME | GRUB_UHCI_REG_PORTSC_RESET
| GRUB_UHCI_REG_PORTSC_SUSPEND
| GRUB_UHCI_REG_PORTSC_SUSPEND,
/* These bits should not be written as 1 unless we really need it */
GRUB_UHCI_PORTSC_RWC = ((1 << 1) | (1 << 3) | (1 << 11) | (3 << 13))
};
#define
/* UHCI Queue Head. */
struct grub_uhci_qh
@ -578,23 +581,23 @@ grub_uhci_check_transfer (grub_usb_controller_t dev,
err = GRUB_USB_ERR_STALL;
/* Check if an error related to the data buffer occurred. */
if (errtd->ctrl_status & (1 << 21))
else if (errtd->ctrl_status & (1 << 21))
err = GRUB_USB_ERR_DATA;
/* Check if a babble error occurred. */
if (errtd->ctrl_status & (1 << 20))
else if (errtd->ctrl_status & (1 << 20))
err = GRUB_USB_ERR_BABBLE;
/* Check if a NAK occurred. */
if (errtd->ctrl_status & (1 << 19))
else if (errtd->ctrl_status & (1 << 19))
err = GRUB_USB_ERR_NAK;
/* Check if a timeout occurred. */
if (errtd->ctrl_status & (1 << 18))
else if (errtd->ctrl_status & (1 << 18))
err = GRUB_USB_ERR_TIMEOUT;
/* Check if a bitstuff error occurred. */
if (errtd->ctrl_status & (1 << 17))
else if (errtd->ctrl_status & (1 << 17))
err = GRUB_USB_ERR_BITSTUFF;
if (err)
@ -685,7 +688,7 @@ grub_uhci_portstatus (grub_usb_controller_t dev,
endtime = grub_get_time_ms () + 1000;
while ((grub_uhci_readreg16 (u, reg) & (1 << 2)))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "UHCI Timed out");
return grub_error (GRUB_ERR_IO, "UHCI Timed out - disable");
status = grub_uhci_readreg16 (u, reg);
grub_dprintf ("uhci", ">3detect=0x%02x\n", status);
@ -693,28 +696,37 @@ grub_uhci_portstatus (grub_usb_controller_t dev,
}
/* Reset the port. */
grub_uhci_writereg16 (u, reg, 1 << 9);
status = grub_uhci_readreg16 (u, reg) & ~GRUB_UHCI_PORTSC_RWC;
grub_uhci_writereg16 (u, reg, status | (1 << 9));
grub_uhci_readreg16 (u, reg); /* Ensure it is writen... */
/* Wait for the reset to complete. XXX: How long exactly? */
grub_millisleep (50); /* For root hub should be nominaly 50ms */
status = grub_uhci_readreg16 (u, reg);
status = grub_uhci_readreg16 (u, reg) & ~GRUB_UHCI_PORTSC_RWC;
grub_uhci_writereg16 (u, reg, status & ~(1 << 9));
grub_dprintf ("uhci", "reset completed\n");
grub_millisleep (10);
grub_uhci_readreg16 (u, reg); /* Ensure it is writen... */
/* Note: some debug prints were removed because they affected reset/enable timing. */
grub_millisleep (1); /* Probably not needed at all or only few microsecs. */
/* Reset bits Connect & Enable Status Change */
status = grub_uhci_readreg16 (u, reg) & ~GRUB_UHCI_PORTSC_RWC;
grub_uhci_writereg16 (u, reg, status | (1 << 3) | GRUB_UHCI_REG_PORTSC_CONNECT_CHANGED);
grub_uhci_readreg16 (u, reg); /* Ensure it is writen... */
/* Enable the port. */
grub_uhci_writereg16 (u, reg, 1 << 2);
grub_millisleep (10);
grub_dprintf ("uhci", "waiting for the port to be enabled\n");
status = grub_uhci_readreg16 (u, reg) & ~GRUB_UHCI_PORTSC_RWC;
grub_uhci_writereg16 (u, reg, status | (1 << 2));
grub_uhci_readreg16 (u, reg); /* Ensure it is writen... */
endtime = grub_get_time_ms () + 1000;
while (! ((status = grub_uhci_readreg16 (u, reg)) & (1 << 2)))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "UHCI Timed out");
return grub_error (GRUB_ERR_IO, "UHCI Timed out - enable");
/* Reset bit Connect Status Change */
grub_uhci_writereg16 (u, reg, status | GRUB_UHCI_REG_PORTSC_CONNECT_CHANGED);
/* Reset recovery time */
grub_millisleep (10);
/* Read final port status */
status = grub_uhci_readreg16 (u, reg);

2
grub-core/bus/usb/usb.c
View file

@ -262,7 +262,7 @@ void grub_usb_device_attach (grub_usb_device_t dev)
if (dev->config[0].interf[i].attached)
continue;
for (desc = attach_hooks; desc; desc = desc->next)
if (interf->class == desc->class && desc->hook (dev, 0, i))
dev->config[0].interf[i].attached = 1;

104
grub-core/bus/usb/usbhub.c
View file

@ -179,19 +179,45 @@ attach_root_port (struct grub_usb_hub *hub, int portno,
{
grub_usb_device_t dev;
grub_err_t err;
int total, i;
grub_usb_speed_t current_speed = GRUB_USB_SPEED_NONE;
int changed=0;
#if 0
/* Specification does not say about disabling of port when device
* connected. If disabling is really necessary for some devices,
* delete this #if 0 and related #endif */
/* Disable the port. XXX: Why? */
err = hub->controller->dev->portstatus (hub->controller, portno, 0);
if (err)
return;
#endif
/* Wait for completion of insertion and stable power (USB spec.)
* Should be at least 100ms, some devices requires more...
* There is also another thing - some devices have worse contacts
* and connected signal is unstable for some time - we should handle
* it - but prevent deadlock in case when device is too faulty... */
for (total = i = 0; (i < 250) && (total < 2000); i++, total++)
{
grub_millisleep (1);
current_speed = hub->controller->dev->detect_dev
(hub->controller, portno, &changed);
if (current_speed == GRUB_USB_SPEED_NONE)
i = 0;
}
grub_dprintf ("usb", "total=%d\n", total);
if (total >= 2000)
return;
/* Enable the port. */
err = hub->controller->dev->portstatus (hub->controller, portno, 1);
if (err)
return;
hub->controller->dev->pending_reset = grub_get_time_ms () + 5000;
/* Enable the port and create a device. */
dev = grub_usb_hub_add_dev (hub->controller, speed);
hub->controller->dev->pending_reset = 0;
if (! dev)
return;
@ -238,11 +264,14 @@ grub_usb_root_hub (grub_usb_controller_t controller)
for (i = 0; i < hub->nports; i++)
{
grub_usb_speed_t speed;
speed = controller->dev->detect_dev (hub->controller, i,
&changed);
if (!controller->dev->pending_reset)
{
speed = controller->dev->detect_dev (hub->controller, i,
&changed);
if (speed != GRUB_USB_SPEED_NONE)
attach_root_port (hub, i, speed);
if (speed != GRUB_USB_SPEED_NONE)
attach_root_port (hub, i, speed);
}
}
return GRUB_USB_ERR_NONE;
@ -284,6 +313,7 @@ poll_nonroot_hub (grub_usb_device_t dev)
unsigned i;
grub_uint8_t changed;
grub_size_t actual;
int j, total;
if (!dev->hub_transfer)
return;
@ -308,6 +338,7 @@ poll_nonroot_hub (grub_usb_device_t dev)
for (i = 1; i <= dev->nports; i++)
{
grub_uint32_t status;
grub_uint32_t current_status = 0;
if (!(changed & (1 << i)))
continue;
@ -319,7 +350,8 @@ poll_nonroot_hub (grub_usb_device_t dev)
GRUB_USB_REQ_GET_STATUS,
0, i, sizeof (status), (char *) &status);
grub_printf ("i = %d, status = %08x\n", i, status);
grub_printf ("dev = 0x%0x, i = %d, status = %08x\n",
(unsigned int) dev, i, status);
if (err)
continue;
@ -346,7 +378,8 @@ poll_nonroot_hub (grub_usb_device_t dev)
GRUB_USB_REQ_CLEAR_FEATURE,
GRUB_USB_HUB_FEATURE_C_PORT_OVERCURRENT, i, 0, 0);
if (status & GRUB_USB_HUB_STATUS_C_PORT_CONNECTED)
if (!dev->controller.dev->pending_reset &&
(status & GRUB_USB_HUB_STATUS_C_PORT_CONNECTED))
{
grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_CLASS
@ -360,8 +393,36 @@ poll_nonroot_hub (grub_usb_device_t dev)
/* Connected and status of connection changed ? */
if (status & GRUB_USB_HUB_STATUS_PORT_CONNECTED)
{
/* A device is actually connected to this port.
* Now do reset of port. */
/* A device is actually connected to this port. */
/* Wait for completion of insertion and stable power (USB spec.)
* Should be at least 100ms, some devices requires more...
* There is also another thing - some devices have worse contacts
* and connected signal is unstable for some time - we should handle
* it - but prevent deadlock in case when device is too faulty... */
for (total = j = 0; (j < 250) && (total < 2000); j++, total++)
{
grub_millisleep (1);
/* 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_GET_STATUS,
0, i,
sizeof (current_status),
(char *) &current_status);
if (err)
{
total = 2000;
break;
}
if (!(current_status & GRUB_USB_HUB_STATUS_PORT_CONNECTED))
j = 0;
}
grub_dprintf ("usb", "(non-root) total=%d\n", total);
if (total >= 2000)
continue;
/* Now do reset of port. */
grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
| GRUB_USB_REQTYPE_CLASS
| GRUB_USB_REQTYPE_TARGET_OTHER),
@ -369,6 +430,15 @@ poll_nonroot_hub (grub_usb_device_t dev)
GRUB_USB_HUB_FEATURE_PORT_RESET,
i, 0, 0);
rescan = 1;
/* We cannot reset more than one device at the same time !
* Resetting more devices together results in very bad
* situation: more than one device has default address 0
* at the same time !!!
* Additionaly, we cannot perform another reset
* anywhere on the same OHCI controller until
* we will finish addressing of reseted device ! */
dev->controller.dev->pending_reset = grub_get_time_ms () + 5000;
return;
}
}
@ -401,6 +471,7 @@ poll_nonroot_hub (grub_usb_device_t dev)
/* Add the device and assign a device address to it. */
next_dev = grub_usb_hub_add_dev (&dev->controller, speed);
dev->controller.dev->pending_reset = 0;
if (! next_dev)
continue;
@ -426,12 +497,21 @@ grub_usb_poll_devices (void)
/* No, it should be never changed, it should be constant. */
for (i = 0; i < hub->nports; i++)
{
grub_usb_speed_t speed;
grub_usb_speed_t speed = GRUB_USB_SPEED_NONE;
int changed = 0;
speed = hub->controller->dev->detect_dev (hub->controller, i,
&changed);
if (!hub->controller->dev->pending_reset)
{
/* Check for possible timeout */
if (grub_get_time_ms () > hub->controller->dev->pending_reset)
{
/* Something went wrong, reset device was not
* addressed properly, timeout happened */
hub->controller->dev->pending_reset = 0;
speed = hub->controller->dev->detect_dev (hub->controller,
i, &changed);
}
}
if (changed)
{
detach_device (hub->devices[i]);

4
grub-core/bus/usb/usbtrans.c
View file

@ -33,10 +33,12 @@ grub_usb_execute_and_wait_transfer (grub_usb_device_t dev,
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;
/* endtime moved behind setup transfer to prevent false timeouts
* while debugging... */
endtime = grub_get_time_ms () + timeout;
while (1)
{
err = dev->controller.dev->check_transfer (&dev->controller, transfer,

3
include/grub/usb.h
View file

@ -116,6 +116,9 @@ struct grub_usb_controller_dev
grub_usb_speed_t (*detect_dev) (grub_usb_controller_t dev, int port, int *changed);
/* Per controller flag - port reset pending, don't do another reset */
grub_uint64_t pending_reset;
/* The next host controller. */
struct grub_usb_controller_dev *next;
};