static int uhci_pci_init(struct usb_hcd *hcd)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
uhci->io_addr = (unsigned long) hcd->rsrc_start;
uhci->rh_numports = uhci_count_ports(hcd);
/* Intel controllers report the OverCurrent bit active on.
* VIA controllers report it active off, so we'll adjust the
* bit value. (It's not standardized in the UHCI spec.)
*/
if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_VIA)
uhci->oc_low = 1;
/* HP's server management chip requires a longer port reset delay. */
if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_HP)
uhci->wait_for_hp = 1;
/* Intel controllers use non-PME wakeup signalling */
if (to_pci_dev(uhci_dev(uhci))->vendor == PCI_VENDOR_ID_INTEL)
device_set_wakeup_capable(uhci_dev(uhci), true);
/* Set up pointers to PCI-specific functions */
uhci->reset_hc = uhci_pci_reset_hc;
uhci->check_and_reset_hc = uhci_pci_check_and_reset_hc;
uhci->configure_hc = uhci_pci_configure_hc;
uhci->resume_detect_interrupts_are_broken =
uhci_pci_resume_detect_interrupts_are_broken;
uhci->global_suspend_mode_is_broken =
uhci_pci_global_suspend_mode_is_broken;
/* Kick BIOS off this hardware and reset if the controller
* isn't already safely quiescent.
*/
check_and_reset_hc(uhci);
return 0;
}
static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
int rc = 0;
dev_dbg(uhci_dev(uhci), "%s\n", __func__);
spin_lock_irq(&uhci->lock);
if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
goto done_okay; /* Already suspended or dead */
/* All PCI host controllers are required to disable IRQ generation
* at the source, so we must turn off PIRQ.
*/
pci_write_config_word(pdev, USBLEGSUP, 0);
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
/* Enable platform-specific non-PME# wakeup */
if (do_wakeup) {
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
pci_write_config_byte(pdev, USBRES_INTEL,
USBPORT1EN | USBPORT2EN);
}
done_okay:
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_unlock_irq(&uhci->lock);
synchronize_irq(hcd->irq);
/* Check for race with a wakeup request */
if (do_wakeup && HCD_WAKEUP_PENDING(hcd)) {
uhci_pci_resume(hcd, false);
rc = -EBUSY;
}
return rc;
}
static int uhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
struct pci_dev *pdev = to_pci_dev(uhci_dev(uhci));
int rc = 0;
dev_dbg(uhci_dev(uhci), "%s\n", __func__);
spin_lock_irq(&uhci->lock);
if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
goto done_okay; /* Already suspended or dead */
if (uhci->rh_state > UHCI_RH_SUSPENDED) {
dev_warn(uhci_dev(uhci), "Root hub isn't suspended!\n");
rc = -EBUSY;
goto done;
};
/* All PCI host controllers are required to disable IRQ generation
* at the source, so we must turn off PIRQ.
*/
pci_write_config_word(pdev, USBLEGSUP, 0);
clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
/* Enable platform-specific non-PME# wakeup */
if (do_wakeup) {
if (pdev->vendor == PCI_VENDOR_ID_INTEL)
pci_write_config_byte(pdev, USBRES_INTEL,
USBPORT1EN | USBPORT2EN);
}
done_okay:
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
done:
spin_unlock_irq(&uhci->lock);
return rc;
}
static void uhci_check_ports(struct uhci_hcd *uhci)
{
unsigned int port;
unsigned long port_addr;
int status;
for (port = 0; port < uhci->rh_numports; ++port) {
port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
status = inw(port_addr);
if (unlikely(status & USBPORTSC_PR)) {
if (time_after_eq(jiffies, uhci->ports_timeout)) {
CLR_RH_PORTSTAT(USBPORTSC_PR);
udelay(10);
/* HP's server management chip requires
* a longer delay. */
if (to_pci_dev(uhci_dev(uhci))->vendor ==
PCI_VENDOR_ID_HP)
wait_for_HP(port_addr);
/* If the port was enabled before, turning
* reset on caused a port enable change.
* Turning reset off causes a port connect
* status change. Clear these changes. */
CLR_RH_PORTSTAT(USBPORTSC_CSC | USBPORTSC_PEC);
SET_RH_PORTSTAT(USBPORTSC_PE);
}
}
if (unlikely(status & USBPORTSC_RD)) {
if (!test_bit(port, &uhci->resuming_ports)) {
/* Port received a wakeup request */
set_bit(port, &uhci->resuming_ports);
uhci->ports_timeout = jiffies +
msecs_to_jiffies(20);
/* Make sure we see the port again
* after the resuming period is over. */
mod_timer(&uhci_to_hcd(uhci)->rh_timer,
uhci->ports_timeout);
} else if (time_after_eq(jiffies,
uhci->ports_timeout)) {
uhci_finish_suspend(uhci, port, port_addr);
}
}
}
}
/*
* Make sure the controller is completely inactive, unable to
* generate interrupts or do DMA.
*/
static void uhci_generic_reset_hc(struct uhci_hcd *uhci)
{
/* Reset the HC - this will force us to get a
* new notification of any already connected
* ports due to the virtual disconnect that it
* implies.
*/
uhci_writew(uhci, USBCMD_HCRESET, USBCMD);
mb();
udelay(5);
if (uhci_readw(uhci, USBCMD) & USBCMD_HCRESET)
dev_warn(uhci_dev(uhci), "HCRESET not completed yet!\n");
/* Just to be safe, disable interrupt requests and
* make sure the controller is stopped.
*/
uhci_writew(uhci, 0, USBINTR);
uhci_writew(uhci, 0, USBCMD);
}
static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
dev_dbg(uhci_dev(uhci), "%s\n", __func__);
/* Since we aren't in D3 any more, it's safe to set this flag
* even if the controller was dead.
*/
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
spin_lock_irq(&uhci->lock);
/* Make sure resume from hibernation re-enumerates everything */
if (hibernated) {
uhci->reset_hc(uhci);
finish_reset(uhci);
}
/* The firmware may have changed the controller settings during
* a system wakeup. Check it and reconfigure to avoid problems.
*/
else {
check_and_reset_hc(uhci);
}
configure_hc(uhci);
/* Tell the core if the controller had to be reset */
if (uhci->rh_state == UHCI_RH_RESET)
usb_root_hub_lost_power(hcd->self.root_hub);
spin_unlock_irq(&uhci->lock);
/* If interrupts don't work and remote wakeup is enabled then
* the suspended root hub needs to be polled.
*/
if (!uhci->RD_enable && hcd->self.root_hub->do_remote_wakeup)
set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
/* Does the root hub have a port wakeup pending? */
usb_hcd_poll_rh_status(hcd);
return 0;
}
/*
* Store the basic register settings needed by the controller.
*/
static void configure_hc(struct uhci_hcd *uhci)
{
/* Set the frame length to the default: 1 ms exactly */
outb(USBSOF_DEFAULT, uhci->io_addr + USBSOF);
/* Store the frame list base address */
outl(uhci->fl->dma_handle, uhci->io_addr + USBFLBASEADD);
/* Set the current frame number */
outw(uhci->frame_number, uhci->io_addr + USBFRNUM);
/* Mark controller as running before we enable interrupts */
uhci_to_hcd(uhci)->state = HC_STATE_RUNNING;
mb();
/* Enable PIRQ */
pci_write_config_word(to_pci_dev(uhci_dev(uhci)), USBLEGSUP,
USBLEGSUP_DEFAULT);
}
static void uhci_generic_reset_hc(struct uhci_hcd *uhci)
{
/*
*/
uhci_writew(uhci, USBCMD_HCRESET, USBCMD);
mb();
udelay(5);
if (uhci_readw(uhci, USBCMD) & USBCMD_HCRESET)
dev_warn(uhci_dev(uhci), "HCRESET not completed yet!\n");
/*
*/
uhci_writew(uhci, 0, USBINTR);
uhci_writew(uhci, 0, USBCMD);
}
static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
{
int port;
/* If we have to ignore overcurrent events then almost by definition
* we can't depend on resume-detect interrupts. */
if (ignore_oc)
return 1;
switch (to_pci_dev(uhci_dev(uhci))->vendor) {
default:
break;
case PCI_VENDOR_ID_GENESYS:
/* Genesys Logic's GL880S controllers don't generate
* resume-detect interrupts.
*/
return 1;
case PCI_VENDOR_ID_INTEL:
/* Some of Intel's USB controllers have a bug that causes
* resume-detect interrupts if any port has an over-current
* condition. To make matters worse, some motherboards
* hardwire unused USB ports' over-current inputs active!
* To prevent problems, we will not enable resume-detect
* interrupts if any ports are OC.
*/
for (port = 0; port < uhci->rh_numports; ++port) {
if (inw(uhci->io_addr + USBPORTSC1 + port * 2) &
USBPORTSC_OC)
return 1;
}
break;
}
return 0;
}
/*
* Initialize a controller that was newly discovered or has just been
* resumed. In either case we can't be sure of its previous state.
*
* Returns: 1 if the controller was reset, 0 otherwise.
*/
static int uhci_pci_check_and_reset_hc(struct uhci_hcd *uhci)
{
return uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)),
uhci->io_addr);
}
/*
* Make sure the controller is completely inactive, unable to
* generate interrupts or do DMA.
*/
static void uhci_pci_reset_hc(struct uhci_hcd *uhci)
{
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
}
/*
* Initialize a controller that was newly discovered or has lost power
* or otherwise been reset while it was suspended. In none of these cases
* can we be sure of its previous state.
*/
static void check_and_reset_hc(struct uhci_hcd *uhci)
{
if (uhci_check_and_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr))
finish_reset(uhci);
}
return 1;
}
break;
}
return 0;
}
static void suspend_rh(struct uhci_hcd *uhci, enum uhci_rh_state new_state)
__releases(uhci->lock)
__acquires(uhci->lock)
{
int auto_stop;
int int_enable;
auto_stop = (new_state == UHCI_RH_AUTO_STOPPED);
dev_dbg(uhci_dev(uhci), "%s%s\n", __FUNCTION__,
(auto_stop ? " (auto-stop)" : ""));
/* If we get a suspend request when we're already auto-stopped
* then there's nothing to do.
*/
if (uhci->rh_state == UHCI_RH_AUTO_STOPPED) {
uhci->rh_state = new_state;
return;
}
/* Enable resume-detect interrupts if they work.
* Then enter Global Suspend mode, still configured.
*/
int_enable = (resume_detect_interrupts_are_broken(uhci) ?
0 : USBINTR_RESUME);
/* size of returned buffer is part of USB spec */
static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
int status, lstatus, retval = 0, len = 0;
unsigned int port = wIndex - 1;
unsigned long port_addr = uhci->io_addr + USBPORTSC1 + 2 * port;
u16 wPortChange, wPortStatus;
unsigned long flags;
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags) || uhci->dead)
return -ETIMEDOUT;
spin_lock_irqsave(&uhci->lock, flags);
switch (typeReq) {
case GetHubStatus:
*(__le32 *)buf = cpu_to_le32(0);
OK(4); /* hub power */
case GetPortStatus:
if (port >= uhci->rh_numports)
goto err;
uhci_check_ports(uhci);
status = inw(port_addr);
/* Intel controllers report the OverCurrent bit active on.
* VIA controllers report it active off, so we'll adjust the
* bit value. (It's not standardized in the UHCI spec.)
*/
if (to_pci_dev(hcd->self.controller)->vendor ==
PCI_VENDOR_ID_VIA)
status ^= USBPORTSC_OC;
/* UHCI doesn't support C_RESET (always false) */
wPortChange = lstatus = 0;
if (status & USBPORTSC_CSC)
wPortChange |= USB_PORT_STAT_C_CONNECTION;
if (status & USBPORTSC_PEC)
wPortChange |= USB_PORT_STAT_C_ENABLE;
if ((status & USBPORTSC_OCC) && !ignore_oc)
wPortChange |= USB_PORT_STAT_C_OVERCURRENT;
if (test_bit(port, &uhci->port_c_suspend)) {
wPortChange |= USB_PORT_STAT_C_SUSPEND;
lstatus |= 1;
}
if (test_bit(port, &uhci->resuming_ports))
lstatus |= 4;
/* UHCI has no power switching (always on) */
wPortStatus = USB_PORT_STAT_POWER;
if (status & USBPORTSC_CCS)
wPortStatus |= USB_PORT_STAT_CONNECTION;
if (status & USBPORTSC_PE) {
wPortStatus |= USB_PORT_STAT_ENABLE;
if (status & SUSPEND_BITS)
wPortStatus |= USB_PORT_STAT_SUSPEND;
}
if (status & USBPORTSC_OC)
wPortStatus |= USB_PORT_STAT_OVERCURRENT;
if (status & USBPORTSC_PR)
wPortStatus |= USB_PORT_STAT_RESET;
if (status & USBPORTSC_LSDA)
wPortStatus |= USB_PORT_STAT_LOW_SPEED;
if (wPortChange)
dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n",
wIndex, status, lstatus);
*(__le16 *)buf = cpu_to_le16(wPortStatus);
*(__le16 *)(buf + 2) = cpu_to_le16(wPortChange);
OK(4);
case SetHubFeature: /* We don't implement these */
case ClearHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
OK(0);
default:
goto err;
}
break;
case SetPortFeature:
if (port >= uhci->rh_numports)
goto err;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
SET_RH_PORTSTAT(USBPORTSC_SUSP);
OK(0);
case USB_PORT_FEAT_RESET:
SET_RH_PORTSTAT(USBPORTSC_PR);
/* Reset terminates Resume signalling */
uhci_finish_suspend(uhci, port, port_addr);
/* USB v2.0 7.1.7.5 */
uhci->ports_timeout = jiffies + msecs_to_jiffies(50);
OK(0);
case USB_PORT_FEAT_POWER:
/* UHCI has no power switching */
OK(0);
default:
goto err;
}
break;
case ClearPortFeature:
if (port >= uhci->rh_numports)
goto err;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
CLR_RH_PORTSTAT(USBPORTSC_PE);
/* Disable terminates Resume signalling */
uhci_finish_suspend(uhci, port, port_addr);
OK(0);
case USB_PORT_FEAT_C_ENABLE:
CLR_RH_PORTSTAT(USBPORTSC_PEC);
OK(0);
case USB_PORT_FEAT_SUSPEND:
if (!(inw(port_addr) & USBPORTSC_SUSP)) {
/* Make certain the port isn't suspended */
uhci_finish_suspend(uhci, port, port_addr);
} else if (!test_and_set_bit(port,
&uhci->resuming_ports)) {
SET_RH_PORTSTAT(USBPORTSC_RD);
/* The controller won't allow RD to be set
* if the port is disabled. When this happens
* just skip the Resume signalling.
*/
if (!(inw(port_addr) & USBPORTSC_RD))
uhci_finish_suspend(uhci, port,
port_addr);
else
/* USB v2.0 7.1.7.7 */
uhci->ports_timeout = jiffies +
msecs_to_jiffies(20);
}
OK(0);
case USB_PORT_FEAT_C_SUSPEND:
clear_bit(port, &uhci->port_c_suspend);
OK(0);
case USB_PORT_FEAT_POWER:
/* UHCI has no power switching */
goto err;
case USB_PORT_FEAT_C_CONNECTION:
CLR_RH_PORTSTAT(USBPORTSC_CSC);
OK(0);
case USB_PORT_FEAT_C_OVER_CURRENT:
CLR_RH_PORTSTAT(USBPORTSC_OCC);
OK(0);
case USB_PORT_FEAT_C_RESET:
/* this driver won't report these */
OK(0);
default:
goto err;
}
break;
case GetHubDescriptor:
len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
memcpy(buf, root_hub_hub_des, len);
if (len > 2)
buf[2] = uhci->rh_numports;
OK(len);
default:
err:
retval = -EPIPE;
}
spin_unlock_irqrestore(&uhci->lock, flags);
return retval;
}
/*
* Last rites for a defunct/nonfunctional controller
* or one we don't want to use any more.
*/
static void hc_died(struct uhci_hcd *uhci)
{
uhci_reset_hc(to_pci_dev(uhci_dev(uhci)), uhci->io_addr);
finish_reset(uhci);
uhci->hc_inaccessible = 1;
}
static int uhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
u16 wIndex, char *buf, u16 wLength)
{
struct uhci_hcd *uhci = hcd_to_uhci(hcd);
int status, lstatus, retval = 0, len = 0;
unsigned int port = wIndex - 1;
unsigned long port_addr = USBPORTSC1 + 2 * port;
u16 wPortChange, wPortStatus;
unsigned long flags;
if (!HCD_HW_ACCESSIBLE(hcd) || uhci->dead)
return -ETIMEDOUT;
spin_lock_irqsave(&uhci->lock, flags);
switch (typeReq) {
case GetHubStatus:
*(__le32 *)buf = cpu_to_le32(0);
OK(4);
case GetPortStatus:
if (port >= uhci->rh_numports)
goto err;
uhci_check_ports(uhci);
status = uhci_readw(uhci, port_addr);
if (uhci->oc_low)
status ^= USBPORTSC_OC;
wPortChange = lstatus = 0;
if (status & USBPORTSC_CSC)
wPortChange |= USB_PORT_STAT_C_CONNECTION;
if (status & USBPORTSC_PEC)
wPortChange |= USB_PORT_STAT_C_ENABLE;
if ((status & USBPORTSC_OCC) && !ignore_oc)
wPortChange |= USB_PORT_STAT_C_OVERCURRENT;
if (test_bit(port, &uhci->port_c_suspend)) {
wPortChange |= USB_PORT_STAT_C_SUSPEND;
lstatus |= 1;
}
if (test_bit(port, &uhci->resuming_ports))
lstatus |= 4;
wPortStatus = USB_PORT_STAT_POWER;
if (status & USBPORTSC_CCS)
wPortStatus |= USB_PORT_STAT_CONNECTION;
if (status & USBPORTSC_PE) {
wPortStatus |= USB_PORT_STAT_ENABLE;
if (status & SUSPEND_BITS)
wPortStatus |= USB_PORT_STAT_SUSPEND;
}
if (status & USBPORTSC_OC)
wPortStatus |= USB_PORT_STAT_OVERCURRENT;
if (status & USBPORTSC_PR)
wPortStatus |= USB_PORT_STAT_RESET;
if (status & USBPORTSC_LSDA)
wPortStatus |= USB_PORT_STAT_LOW_SPEED;
if (wPortChange)
dev_dbg(uhci_dev(uhci), "port %d portsc %04x,%02x\n",
wIndex, status, lstatus);
*(__le16 *)buf = cpu_to_le16(wPortStatus);
*(__le16 *)(buf + 2) = cpu_to_le16(wPortChange);
OK(4);
case SetHubFeature:
case ClearHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
case C_HUB_LOCAL_POWER:
OK(0);
default:
goto err;
}
break;
case SetPortFeature:
if (port >= uhci->rh_numports)
goto err;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
SET_RH_PORTSTAT(USBPORTSC_SUSP);
OK(0);
case USB_PORT_FEAT_RESET:
SET_RH_PORTSTAT(USBPORTSC_PR);
uhci_finish_suspend(uhci, port, port_addr);
uhci->ports_timeout = jiffies + msecs_to_jiffies(50);
OK(0);
case USB_PORT_FEAT_POWER:
OK(0);
default:
goto err;
}
break;
case ClearPortFeature:
if (port >= uhci->rh_numports)
goto err;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
CLR_RH_PORTSTAT(USBPORTSC_PE);
uhci_finish_suspend(uhci, port, port_addr);
OK(0);
case USB_PORT_FEAT_C_ENABLE:
CLR_RH_PORTSTAT(USBPORTSC_PEC);
OK(0);
case USB_PORT_FEAT_SUSPEND:
if (!(uhci_readw(uhci, port_addr) & USBPORTSC_SUSP)) {
uhci_finish_suspend(uhci, port, port_addr);
} else if (!test_and_set_bit(port,
&uhci->resuming_ports)) {
SET_RH_PORTSTAT(USBPORTSC_RD);
if (!(uhci_readw(uhci, port_addr) &
USBPORTSC_RD))
uhci_finish_suspend(uhci, port,
port_addr);
else
uhci->ports_timeout = jiffies +
msecs_to_jiffies(20);
}
OK(0);
case USB_PORT_FEAT_C_SUSPEND:
clear_bit(port, &uhci->port_c_suspend);
OK(0);
case USB_PORT_FEAT_POWER:
goto err;
case USB_PORT_FEAT_C_CONNECTION:
CLR_RH_PORTSTAT(USBPORTSC_CSC);
OK(0);
case USB_PORT_FEAT_C_OVER_CURRENT:
CLR_RH_PORTSTAT(USBPORTSC_OCC);
OK(0);
case USB_PORT_FEAT_C_RESET:
OK(0);
default:
goto err;
}
break;
case GetHubDescriptor:
len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
memcpy(buf, root_hub_hub_des, len);
if (len > 2)
buf[2] = uhci->rh_numports;
OK(len);
default:
err:
retval = -EPIPE;
}
spin_unlock_irqrestore(&uhci->lock, flags);
return retval;
}