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rt-thread/bsp/allwinner/libraries/sunxi-hal/hal/source/usb/host/ehci-hub.c

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sync branch rt-smart. (#6641) * Synchronize the code of the rt mart branch to the master branch. * TTY device * Add lwP code from rt-smart * Add vnode in DFS, but DFS will be re-write for rt-smart * There are three libcpu for rt-smart: * arm/cortex-a, arm/aarch64 * riscv64 Co-authored-by: Rbb666 <zhangbingru@rt-thread.com> Co-authored-by: zhkag <zhkag@foxmail.com>
2022-12-03 12:07:44 +08:00
/*
* Copyright (C) 2001-2004 by David Brownell
*
* This program 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 2 of the License, or (at your
* option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* this file is part of ehci-hcd.c */
/*-------------------------------------------------------------------------*/
/*
* EHCI Root Hub ... the nonsharable stuff
*
* Registers don't need cpu_to_le32, that happens transparently
*/
/*-------------------------------------------------------------------------*/
//#include <linux/usb/otg.h>
#include <usb_host_hub.h>
#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
static void unlink_empty_async_suspended(struct ehci_hcd *ehci);
//static int persist_enabled_on_companion(struct usb_device *udev, void *unused)
//{
// return !udev->maxchild && udev->persist_enabled &&
// udev->bus->root_hub->speed < USB_SPEED_HIGH;
//}
//
///* After a power loss, ports that were owned by the companion must be
// * reset so that the companion can still own them.
// */
//static void ehci_handover_companion_ports(struct ehci_hcd *ehci)
//{
// u32 __iomem *reg;
// u32 status;
// int port;
// __le32 buf;
// struct hc_gen_hcd * *hcd = ehci_to_hcd(ehci);
//
// if (!ehci->owned_ports)
// return;
//
// /*
// * USB 1.1 devices are mostly HIDs, which don't need to persist across
// * suspends. If we ensure that none of our companion's devices have
// * persist_enabled (by looking through all USB 1.1 buses in the system),
// * we can skip this and avoid slowing resume down. Devices without
// * persist will just get reenumerated shortly after resume anyway.
// */
// if (!usb_for_each_dev(NULL, persist_enabled_on_companion))
// return;
//
// /* Make sure the ports are powered */
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// if (usb_test_bit(port, &ehci->owned_ports)) {
// reg = &ehci->regs->port_status[port];
// status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
// if (!(status & PORT_POWER))
// ehci_port_power(ehci, port, true);
// }
// }
//
// /* Give the connections some time to appear */
// hal_msleep(20);
//
// spin_lock_irq(&ehci->lock);
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// if (usb_test_bit(port, &ehci->owned_ports)) {
// reg = &ehci->regs->port_status[port];
// status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
//
// /* Port already owned by companion? */
// if (status & PORT_OWNER)
// usb_clear_bit(port, &ehci->owned_ports);
// else if (usb_test_bit(port, &ehci->companion_ports))
// ehci_writel(ehci, status & ~PORT_PE, reg);
// else {
// spin_unlock_irq(&ehci->lock);
// ehci_hub_control(hcd, SetPortFeature,
// USB_PORT_FEAT_RESET, port + 1,
// NULL, 0);
// spin_lock_irq(&ehci->lock);
// }
// }
// }
// spin_unlock_irq(&ehci->lock);
//
// if (!ehci->owned_ports)
// return;
// hal_msleep(90); /* Wait for resets to complete */
//
// spin_lock_irq(&ehci->lock);
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// if (usb_test_bit(port, &ehci->owned_ports)) {
// spin_unlock_irq(&ehci->lock);
// ehci_hub_control(hcd, GetPortStatus,
// 0, port + 1,
// (char *) &buf, sizeof(buf));
// spin_lock_irq(&ehci->lock);
//
// /* The companion should now own the port,
// * but if something went wrong the port must not
// * remain enabled.
// */
// reg = &ehci->regs->port_status[port];
// status = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
// if (status & PORT_OWNER)
// ehci_writel(ehci, status | PORT_CSC, reg);
// else {
// ehci_dbg("failed handover port %d: %x\n",
// port + 1, status);
// ehci_writel(ehci, status & ~PORT_PE, reg);
// }
// }
// }
//
// ehci->owned_ports = 0;
// spin_unlock_irq(&ehci->lock);
//}
//static int ehci_port_change(struct ehci_hcd *ehci)
//{
// int i = HCS_N_PORTS(ehci->hcs_params);
//
// /* First check if the controller indicates a change event */
//
// if (ehci_readl(ehci, &ehci->regs->status) & STS_PCD)
// return 1;
//
// /*
// * Not all controllers appear to update this while going from D3 to D0,
// * so check the individual port status registers as well
// */
//
// while (i--)
// if (ehci_readl(ehci, &ehci->regs->port_status[i]) & PORT_CSC)
// return 1;
//
// return 0;
//}
//void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
// bool suspending, bool do_wakeup)
//{
// int port;
// u32 temp;
//
// /* If remote wakeup is enabled for the root hub but disabled
// * for the controller, we must adjust all the port wakeup flags
// * when the controller is suspended or resumed. In all other
// * cases they don't need to be changed.
// */
// if (!ehci_to_hcd(ehci)->self.root_hub->do_remote_wakeup || do_wakeup)
// return;
//
// spin_lock_irq(&ehci->lock);
//
// /* clear phy low-power mode before changing wakeup flags */
// if (ehci->has_tdi_phy_lpm) {
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
//
// temp = ehci_readl(ehci, hostpc_reg);
// ehci_writel(ehci, temp & ~HOSTPC_PHCD, hostpc_reg);
// }
// spin_unlock_irq(&ehci->lock);
// hal_msleep(5);
// spin_lock_irq(&ehci->lock);
// }
//
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// u32 __iomem *reg = &ehci->regs->port_status[port];
// u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
// u32 t2 = t1 & ~PORT_WAKE_BITS;
//
// /* If we are suspending the controller, clear the flags.
// * If we are resuming the controller, set the wakeup flags.
// */
// if (!suspending) {
// if (t1 & PORT_CONNECT)
// t2 |= PORT_WKOC_E | PORT_WKDISC_E;
// else
// t2 |= PORT_WKOC_E | PORT_WKCONN_E;
// }
// ehci_writel(ehci, t2, reg);
// }
//
// /* enter phy low-power mode again */
// if (ehci->has_tdi_phy_lpm) {
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
//
// temp = ehci_readl(ehci, hostpc_reg);
// ehci_writel(ehci, temp | HOSTPC_PHCD, hostpc_reg);
// }
// }
//
// /* Does the root hub have a port wakeup pending? */
// if (!suspending && ehci_port_change(ehci))
// usb_hcd_resume_root_hub(ehci_to_hcd(ehci));
//
// spin_unlock_irq(&ehci->lock);
//}
//EXPORT_SYMBOL_GPL(ehci_adjust_port_wakeup_flags);
int ehci_bus_suspend (struct hc_gen_dev *hcd)
{
__inf("ERR: Not support suspend.\n");
return 0;
}
int ehci_bus_resume (struct hc_gen_dev *hcd)
{
__inf("ERR: Not support resume.\n");
return 0;
}
//static int ehci_bus_suspend (struct hc_gen_hcd **hcd)
//{
// struct ehci_hcd *ehci = hcd_to_ehci (hcd);
// int port;
// int mask;
// int changed;
// bool fs_idle_delay;
//
// ehci_dbg("suspend root hub\n");
//
// if (time_before (jiffies, ehci->next_statechange))
// hal_msleep(5);
//
// /* stop the schedules */
// ehci_quiesce(ehci);
//
// spin_lock_irq (&ehci->lock);
// if (ehci->rh_state < EHCI_RH_RUNNING)
// goto done;
//
// /* Once the controller is stopped, port resumes that are already
// * in progress won't complete. Hence if remote wakeup is enabled
// * for the root hub and any ports are in the middle of a resume or
// * remote wakeup, we must fail the suspend.
// */
// if (hcd->self.root_hub->do_remote_wakeup) {
// if (ehci->resuming_ports) {
// spin_unlock_irq(&ehci->lock);
// ehci_dbg("suspend failed because a port is resuming\n");
// return -EBUSY;
// }
// }
//
// /* Unlike other USB host controller types, EHCI doesn't have
// * any notion of "global" or bus-wide suspend. The driver has
// * to manually suspend all the active unsuspended ports, and
// * then manually resume them in the bus_resume() routine.
// */
// ehci->bus_suspended = 0;
// ehci->owned_ports = 0;
// changed = 0;
// fs_idle_delay = false;
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// u32 __iomem *reg = &ehci->regs->port_status [port];
// u32 t1 = ehci_readl(ehci, reg) & ~PORT_RWC_BITS;
// u32 t2 = t1 & ~PORT_WAKE_BITS;
//
// /* keep track of which ports we suspend */
// if (t1 & PORT_OWNER)
// usb_set_bit(port, &ehci->owned_ports);
// else if ((t1 & PORT_PE) && !(t1 & PORT_SUSPEND)) {
// t2 |= PORT_SUSPEND;
// usb_set_bit(port, &ehci->bus_suspended);
// }
//
// /* enable remote wakeup on all ports, if told to do so */
// if (hcd->self.root_hub->do_remote_wakeup) {
// /* only enable appropriate wake bits, otherwise the
// * hardware can not go phy low power mode. If a race
// * condition happens here(connection change during bits
// * set), the port change detection will finally fix it.
// */
// if (t1 & PORT_CONNECT)
// t2 |= PORT_WKOC_E | PORT_WKDISC_E;
// else
// t2 |= PORT_WKOC_E | PORT_WKCONN_E;
// }
//
// if (t1 != t2) {
// /*
// * On some controllers, Wake-On-Disconnect will
// * generate false wakeup signals until the bus
// * switches over to full-speed idle. For their
// * sake, add a delay if we need one.
// */
// if ((t2 & PORT_WKDISC_E) &&
// ehci_port_speed(ehci, t2) ==
// USB_PORT_STAT_HIGH_SPEED)
// fs_idle_delay = true;
// ehci_writel(ehci, t2, reg);
// changed = 1;
// }
// }
// spin_unlock_irq(&ehci->lock);
//
// if ((changed && ehci->has_tdi_phy_lpm) || fs_idle_delay) {
// /*
// * Wait for HCD to enter low-power mode or for the bus
// * to switch to full-speed idle.
// */
// usleep_range(5000, 5500);
// }
//
// if (changed && ehci->has_tdi_phy_lpm) {
// spin_lock_irq(&ehci->lock);
// port = HCS_N_PORTS(ehci->hcs_params);
// while (port--) {
// u32 __iomem *hostpc_reg = &ehci->regs->hostpc[port];
// u32 t3;
//
// t3 = ehci_readl(ehci, hostpc_reg);
// ehci_writel(ehci, t3 | HOSTPC_PHCD, hostpc_reg);
// t3 = ehci_readl(ehci, hostpc_reg);
// ehci_dbg("Port %d phy low-power mode %s\n",
// port, (t3 & HOSTPC_PHCD) ?
// "succeeded" : "failed");
// }
// spin_unlock_irq(&ehci->lock);
// }
//
// /* Apparently some devices need a >= 1-uframe delay here */
// if (ehci->bus_suspended)
// udelay(150);
//
// /* turn off now-idle HC */
// ehci_halt (ehci);
//
// spin_lock_irq(&ehci->lock);
// if (ehci->enabled_hrtimer_events & BIT(EHCI_HRTIMER_POLL_DEAD))
// ehci_handle_controller_death(ehci);
// if (ehci->rh_state != EHCI_RH_RUNNING)
// goto done;
// ehci->rh_state = EHCI_RH_SUSPENDED;
//
// unlink_empty_async_suspended(ehci);
//
// /* Any IAA cycle that started before the suspend is now invalid */
// end_iaa_cycle(ehci);
// ehci_handle_start_intr_unlinks(ehci);
// ehci_handle_intr_unlinks(ehci);
// end_free_itds(ehci);
//
// /* allow remote wakeup */
// mask = INTR_MASK;
// if (!hcd->self.root_hub->do_remote_wakeup)
// mask &= ~STS_PCD;
// ehci_writel(ehci, mask, &ehci->regs->intr_enable);
// ehci_readl(ehci, &ehci->regs->intr_enable);
//
// done:
// ehci->next_statechange = jiffies + msecs_to_jiffies(10);
// ehci->enabled_hrtimer_events = 0;
// ehci->next_hrtimer_event = EHCI_HRTIMER_NO_EVENT;
// spin_unlock_irq (&ehci->lock);
//
// hrtimer_cancel(&ehci->hrtimer);
// return 0;
//}
/* caller has locked the root hub, and should reset/reinit on error */
//static int ehci_bus_resume (struct hc_gen_hcd **hcd)
//{
// struct ehci_hcd *ehci = hcd_to_ehci (hcd);
// u32 temp;
// u32 power_okay;
// int i;
// unsigned long resume_needed = 0;
//
// if (time_before (jiffies, ehci->next_statechange))
// hal_msleep(5);
// spin_lock_irq (&ehci->lock);
// if (!HCD_HW_ACCESSIBLE(hcd) || ehci->shutdown)
// goto shutdown;
//
// if (unlikely(ehci->debug)) {
// if (!dbgp_reset_prep(hcd))
// ehci->debug = NULL;
// else
// dbgp_external_startup(hcd);
// }
//
// /* Ideally and we've got a real resume here, and no port's power
// * was lost. (For PCI, that means Vaux was maintained.) But we
// * could instead be restoring a swsusp snapshot -- so that BIOS was
// * the last user of the controller, not reset/pm hardware keeping
// * state we gave to it.
// */
// power_okay = ehci_readl(ehci, &ehci->regs->intr_enable);
// ehci_dbg("resume root hub%s\n",
// power_okay ? "" : " after power loss");
//
// /* at least some APM implementations will try to deliver
// * IRQs right away, so delay them until we're ready.
// */
// ehci_writel(ehci, 0, &ehci->regs->intr_enable);
//
// /* re-init operational registers */
// ehci_writel(ehci, 0, &ehci->regs->segment);
// ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
// ehci_writel(ehci, (u32) ehci->async->qh_dma, &ehci->regs->async_next);
//
// /* restore CMD_RUN, framelist size, and irq threshold */
// ehci->command |= CMD_RUN;
// ehci_writel(ehci, ehci->command, &ehci->regs->command);
// ehci->rh_state = EHCI_RH_RUNNING;
//
// /*
// * According to Bugzilla #8190, the port status for some controllers
// * will be wrong without a delay. At their wrong status, the port
// * is enabled, but not suspended neither resumed.
// */
// i = HCS_N_PORTS(ehci->hcs_params);
// while (i--) {
// temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
// if ((temp & PORT_PE) &&
// !(temp & (PORT_SUSPEND | PORT_RESUME))) {
// ehci_dbg("Port status(0x%x) is wrong\n", temp);
// spin_unlock_irq(&ehci->lock);
// hal_msleep(8);
// spin_lock_irq(&ehci->lock);
// break;
// }
// }
//
// if (ehci->shutdown)
// goto shutdown;
//
// /* clear phy low-power mode before resume */
// if (ehci->bus_suspended && ehci->has_tdi_phy_lpm) {
// i = HCS_N_PORTS(ehci->hcs_params);
// while (i--) {
// if (usb_test_bit(i, &ehci->bus_suspended)) {
// u32 __iomem *hostpc_reg =
// &ehci->regs->hostpc[i];
//
// temp = ehci_readl(ehci, hostpc_reg);
// ehci_writel(ehci, temp & ~HOSTPC_PHCD,
// hostpc_reg);
// }
// }
// spin_unlock_irq(&ehci->lock);
// hal_msleep(5);
// spin_lock_irq(&ehci->lock);
// if (ehci->shutdown)
// goto shutdown;
// }
//
// /* manually resume the ports we suspended during bus_suspend() */
// i = HCS_N_PORTS (ehci->hcs_params);
// while (i--) {
// temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
// temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
// if (usb_test_bit(i, &ehci->bus_suspended) &&
// (temp & PORT_SUSPEND)) {
// temp |= PORT_RESUME;
// usb_set_bit(i, &resume_needed);
// }
// ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
// }
//
// /*
// * hal_msleep for USB_RESUME_TIMEOUT ms only if code is trying to resume
// * port
// */
// if (resume_needed) {
// spin_unlock_irq(&ehci->lock);
// hal_msleep(USB_RESUME_TIMEOUT);
// spin_lock_irq(&ehci->lock);
// if (ehci->shutdown)
// goto shutdown;
// }
//
// i = HCS_N_PORTS (ehci->hcs_params);
// while (i--) {
// temp = ehci_readl(ehci, &ehci->regs->port_status [i]);
// if (usb_test_bit(i, &resume_needed)) {
// temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
// ehci_writel(ehci, temp, &ehci->regs->port_status [i]);
// }
// }
//
// ehci->next_statechange = jiffies + msecs_to_jiffies(5);
// spin_unlock_irq(&ehci->lock);
//
// ehci_handover_companion_ports(ehci);
//
// /* Now we can safely re-enable irqs */
// spin_lock_irq(&ehci->lock);
// if (ehci->shutdown)
// goto shutdown;
// ehci_writel(ehci, INTR_MASK, &ehci->regs->intr_enable);
// (void) ehci_readl(ehci, &ehci->regs->intr_enable);
// spin_unlock_irq(&ehci->lock);
//
// return 0;
//
// shutdown:
// spin_unlock_irq(&ehci->lock);
// return -ESHUTDOWN;
//}
//
//#else
//
//#define ehci_bus_suspend NULL
//#define ehci_bus_resume NULL
//
//#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
/*
* Sets the owner of a port
*/
static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
{
//u32 __iomem *status_reg;
u32 port_status;
int try;
//status_reg = &ehci->regs->port_status[portnum];
/*
* The controller won't set the OWNER bit if the port is
* enabled, so this loop will sometimes require at least two
* iterations: one to disable the port and one to set OWNER.
*/
for (try = 4; try > 0; --try) {
hal_spin_lock(&ehci->lock);
port_status = ehci_readl(ehci,
&ehci->regs->port_status[portnum]);
if ((port_status & PORT_OWNER) == new_owner
|| (port_status & (PORT_OWNER | PORT_CONNECT))
== 0)
try = 0;
else {
port_status ^= PORT_OWNER;
port_status &= ~(PORT_PE | PORT_RWC_BITS);
ehci_writel(ehci, port_status,
&ehci->regs->port_status[portnum]);
}
hal_spin_unlock(&ehci->lock);
if (try > 1)
hal_msleep(5);
}
}
/*-------------------------------------------------------------------------*/
static int check_reset_complete (
struct ehci_hcd *ehci,
int index,
u32 *status_reg,
int port_status
) {
if (!(port_status & PORT_CONNECT))
return port_status;
/* if reset finished and it's still not enabled -- handoff */
if (!(port_status & PORT_PE)) {
/* with integrated TT, there's nobody to hand it to! */
//if (ehci_is_TDI(ehci)) {
// ehci_dbg("Failed to enable port %d on root hub TT\n",
// index+1);
// return port_status;
//}
ehci_dbg("port %d full speed --> companion\n",
index + 1);
// what happens if HCS_N_CC(params) == 0 ?
port_status |= PORT_OWNER;
port_status &= ~PORT_RWC_BITS;
ehci_writel(ehci, port_status, status_reg);
/* ensure 440EPX ohci controller state is operational */
if (ehci->has_amcc_usb23)
set_ohci_hcfs(ehci, 1);
} else {
ehci_dbg("port %d reset complete, port enabled\n",
index + 1);
/* ensure 440EPx ohci controller state is suspended */
if (ehci->has_amcc_usb23)
set_ohci_hcfs(ehci, 0);
}
return port_status;
}
/*-------------------------------------------------------------------------*/
/* build "status change" packet (one or two bytes) from HC registers */
int ehci_hub_status_data (struct hc_gen_dev *hcd, char *buf)
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
u32 temp, status;
u32 mask;
int ports, i, retval = 1;
unsigned long flags;
u32 ppcd = ~0;
/* init status to no-changes */
buf [0] = 0;
ports = HCS_N_PORTS (ehci->hcs_params);
if (ports > 7) {
buf [1] = 0;
retval++;
}
/* Inform the core about resumes-in-progress by returning
* a non-zero value even if there are no status changes.
*/
status = ehci->resuming_ports;
/* Some boards (mostly VIA?) report bogus overcurrent indications,
* causing massive log spam unless we completely ignore them. It
* may be relevant that VIA VT8235 controllers, where PORT_POWER is
* always set, seem to clear PORT_OCC and PORT_CSC when writing to
* PORT_POWER; that's surprising, but maybe within-spec.
*/
//if (!ignore_oc)
// mask = PORT_CSC | PORT_PEC | PORT_OCC;
//else
mask = PORT_CSC | PORT_PEC;
// PORT_RESUME from hardware ~= PORT_STAT_C_SUSPEND
/* no hub change reports (bit 0) for now (power, ...) */
/* port N changes (bit N)? */
flags = hal_spin_lock_irqsave(&ehci->lock);
/* get per-port change detect bits */
if (ehci->has_ppcd)
ppcd = ehci_readl(ehci, &ehci->regs->status) >> 16;
for (i = 0; i < ports; i++) {
/* leverage per-port change bits feature */
if (ppcd & (1 << i))
temp = ehci_readl(ehci, &ehci->regs->port_status[i]);
else
temp = 0;
/*
* Return status information even for ports with OWNER set.
* Otherwise hub_wq wouldn't see the disconnect event when a
* high-speed device is switched over to the companion
* controller by the user.
*/
if ((temp & mask) != 0 || usb_test_bit(i, (volatile uint32_t *)&ehci->port_c_suspend)) {
//|| (ehci->reset_done[i] && time_after_eq(
// jiffies, ehci->reset_done[i]))) {
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
status = STS_PCD;
}
}
/* If a resume is in progress, make sure it can finish */
/*
if (ehci->resuming_ports)
mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(25));
*/
hal_spin_unlock_irqrestore (&ehci->lock, flags);
return status ? retval : 0;
}
/*-------------------------------------------------------------------------*/
static void
ehci_hub_descriptor (
struct ehci_hcd *ehci,
struct usb_hub_descriptor *desc
) {
int ports = HCS_N_PORTS (ehci->hcs_params);
u16 temp;
desc->bDescriptorType = USB_DT_HUB;
desc->bPwrOn2PwrGood = 10; /* ehci 1.0, 2.3.9 says 20ms max */
desc->bHubContrCurrent = 0;
desc->bNbrPorts = ports;
temp = 1 + (ports / 8);
desc->bDescLength = 7 + 2 * temp;
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
memset(&desc->DeviceRemovable[0], 0, temp);
memset(&desc->DeviceRemovable[temp], 0xff, temp);
//temp = HUB_CHAR_INDV_PORT_OCPM; /* per-port overcurrent reporting */
//if (HCS_PPC (ehci->hcs_params))
// temp |= HUB_CHAR_INDV_PORT_LPSM; /* per-port power control */
//else
// temp |= HUB_CHAR_NO_LPSM; /* no power switching */
#if 0
// re-enable when we support USB_PORT_FEAT_INDICATOR below.
if (HCS_INDICATOR (ehci->hcs_params))
temp |= HUB_CHAR_PORTIND; /* per-port indicators (LEDs) */
#endif
desc->wHubCharacteristics = cpu_to_le16(temp);
}
/*-------------------------------------------------------------------------*/
int ehci_hub_control(
struct hc_gen_dev *hcd,
u16 typeReq,
u16 wValue,
u16 wIndex,
char *buf,
u16 wLength
) {
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
int ports = HCS_N_PORTS (ehci->hcs_params);
u32 *status_reg, *hostpc_reg;
u32 temp, temp1, status;
uint32_t flags;
int retval = 0;
unsigned selector;
/*
* Avoid underflow while calculating (wIndex & 0xff) - 1.
* The compiler might deduce that wIndex can never be 0 and then
* optimize away the tests for !wIndex below.
*/
temp = wIndex & 0xff;
temp -= (temp > 0);
status_reg = &ehci->regs->port_status[temp];
hostpc_reg = &ehci->regs->hostpc[temp];
//printf("[%s %d] typeReq = 0x%x, wValue = 0x%x, wIndex = 0x%x, wLength = 0x%x, status_reg = 0x%lx\n", __func__, __LINE__,
// typeReq, wValue, wIndex, wLength, ehci_readl(ehci, status_reg));
/*
* FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR.
* HCS_INDICATOR may say we can change LEDs to off/amber/green.
* (track current state ourselves) ... blink for diagnostics,
* power, "this is the one", etc. EHCI spec supports this.
*/
flags = hal_spin_lock_irqsave(&ehci->lock);
switch (typeReq) {
case ClearHubFeature:
switch (wValue) {
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
/* no hub-wide feature/status flags */
break;
default:
goto error;
}
break;
case ClearPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
temp = ehci_readl(ehci, status_reg);
temp &= ~PORT_RWC_BITS;
/*
* Even if OWNER is set, so the port is owned by the
* companion controller, hub_wq needs to be able to clear
* the port-change status bits (especially
* USB_PORT_STAT_C_CONNECTION).
*/
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
ehci_writel(ehci, temp & ~PORT_PE, status_reg);
break;
case USB_PORT_FEAT_C_ENABLE:
ehci_writel(ehci, temp | PORT_PEC, status_reg);
break;
case USB_PORT_FEAT_SUSPEND:
if (temp & PORT_RESET)
goto error;
if (ehci->no_selective_suspend)
break;
if (!(temp & PORT_SUSPEND))
break;
if ((temp & PORT_PE) == 0)
goto error;
/* clear phy low-power mode before resume */
if (ehci->has_tdi_phy_lpm) {
temp1 = ehci_readl(ehci, hostpc_reg);
ehci_writel(ehci, temp1 & ~HOSTPC_PHCD,
hostpc_reg);
hal_spin_unlock_irqrestore(&ehci->lock, flags);
hal_msleep(5);/* wait to leave low-power mode */
flags = hal_spin_lock_irqsave(&ehci->lock);
}
/* resume signaling for 20 msec */
temp &= ~PORT_WAKE_BITS;
ehci_writel(ehci, temp | PORT_RESUME, status_reg);
//ehci->reset_done[wIndex] = jiffies
// + msecs_to_jiffies(USB_RESUME_TIMEOUT);
usb_set_bit(wIndex, (volatile uint32_t *)&ehci->resuming_ports);
usb_hcd_start_port_resume(&hcd->self, wIndex);
break;
case USB_PORT_FEAT_C_SUSPEND:
usb_clear_bit(wIndex, (volatile uint32_t *)&ehci->port_c_suspend);
break;
case USB_PORT_FEAT_POWER:
if (HCS_PPC(ehci->hcs_params)) {
hal_spin_unlock_irqrestore(&ehci->lock, flags);
ehci_port_power(ehci, wIndex, false);
flags = hal_spin_lock_irqsave(&ehci->lock);
}
break;
case USB_PORT_FEAT_C_CONNECTION:
ehci_writel(ehci, temp | PORT_CSC, status_reg);
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
ehci_writel(ehci, temp | PORT_OCC, status_reg);
break;
case USB_PORT_FEAT_C_RESET:
/* GetPortStatus clears reset */
break;
default:
goto error;
}
ehci_readl(ehci, &ehci->regs->command); /* unblock posted write */
break;
case GetHubDescriptor:
ehci_hub_descriptor (ehci, (struct usb_hub_descriptor *)
buf);
break;
case GetHubStatus:
/* no hub-wide feature/status flags */
memset (buf, 0, 4);
//cpu_to_le32s ((u32 *) buf);
break;
case GetPortStatus:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
status = 0;
temp = ehci_readl(ehci, status_reg);
// wPortChange bits
if (temp & PORT_CSC)
status |= USB_PORT_STAT_C_CONNECTION << 16;
if (temp & PORT_PEC)
status |= USB_PORT_STAT_C_ENABLE << 16;
//if ((temp & PORT_OCC) && !ignore_oc){
// status |= USB_PORT_STAT_C_OVERCURRENT << 16;
// /*
// * Hubs should disable port power on over-current.
// * However, not all EHCI implementations do this
// * automatically, even if they _do_ support per-port
// * power switching; they're allowed to just limit the
// * current. hub_wq will turn the power back on.
// */
// if (((temp & PORT_OC) || (ehci->need_oc_pp_cycle))
// && HCS_PPC(ehci->hcs_params)) {
// spin_unlock_irqrestore(&ehci->lock, flags);
// ehci_port_power(ehci, wIndex, false);
// spin_lock_irqsave(&ehci->lock, flags);
// temp = ehci_readl(ehci, status_reg);
// }
//}
/* no reset or resume pending */
if (!ehci->reset_done[wIndex]) {
/* Remote Wakeup received? */
// if (temp & PORT_RESUME) {
// /* resume signaling for 20 msec */
// ehci->reset_done[wIndex] = jiffies
// + msecs_to_jiffies(20);
// usb_hcd_start_port_resume(&hcd->self, wIndex);
// usb_set_bit(wIndex, &ehci->resuming_ports);
// /* check the port again */
// mod_timer(&ehci_to_hcd(ehci)->rh_timer,
// ehci->reset_done[wIndex]);
// }
/* reset or resume not yet complete */
//} else if (!time_after_eq(jiffies, ehci->reset_done[wIndex])) {
// ; /* wait until it is complete */
/* resume completed */
} else if (usb_test_bit(wIndex, (volatile uint32_t *)&ehci->resuming_ports)) {
// usb_clear_bit(wIndex, &ehci->suspended_ports);
// usb_set_bit(wIndex, &ehci->port_c_suspend);
// ehci->reset_done[wIndex] = 0;
// usb_hcd_end_port_resume(&hcd->self, wIndex);
// /* stop resume signaling */
// temp &= ~(PORT_RWC_BITS | PORT_SUSPEND | PORT_RESUME);
// ehci_writel(ehci, temp, status_reg);
// usb_clear_bit(wIndex, &ehci->resuming_ports);
// retval = ehci_handshake(ehci, status_reg,
// PORT_RESUME, 0, 2000 /* 2msec */);
// if (retval != 0) {
// ehci_dbg("port %d resume error %d\n",
// wIndex + 1, retval);
// goto error;
// }
// temp = ehci_readl(ehci, status_reg);
/* whoever resets must GetPortStatus to complete it!! */
} else {
/* FIXME: we need to implement time_after_eq or
* something similar to wait reset complete.
*/
hal_spin_unlock_irqrestore(&ehci->lock, flags);
hal_msleep(50);
flags = hal_spin_lock_irqsave(&ehci->lock);
status |= USB_PORT_STAT_C_RESET << 16;
ehci->reset_done [wIndex] = 0;
/* force reset to complete */
ehci_writel(ehci, temp & ~(PORT_RWC_BITS | PORT_RESET),
status_reg);
/* REVISIT: some hardware needs 550+ usec to clear
* this bit; seems too long to spin routinely...
*/
retval = ehci_handshake(ehci, status_reg,
PORT_RESET, 0, 1000);
if (retval != 0) {
ehci_err ("port %d reset error %d\n",
wIndex + 1, retval);
goto error;
}
/* see what we found out */
temp = check_reset_complete (ehci, wIndex, status_reg,
ehci_readl(ehci, status_reg));
}
/* transfer dedicated ports to the companion hc */
if ((temp & PORT_CONNECT) &&
usb_test_bit(wIndex, (volatile uint32_t *)&ehci->companion_ports)) {
temp &= ~PORT_RWC_BITS;
temp |= PORT_OWNER;
ehci_writel(ehci, temp, status_reg);
ehci_dbg("port %d --> companion\n", wIndex + 1);
temp = ehci_readl(ehci, status_reg);
}
/*
* Even if OWNER is set, there's no harm letting hub_wq
* see the wPortStatus values (they should all be 0 except
* for PORT_POWER anyway).
*/
if (temp & PORT_CONNECT) {
status |= USB_PORT_STAT_CONNECTION;
// status may be from integrated TT
if (ehci->has_hostpc) {
temp1 = ehci_readl(ehci, hostpc_reg);
//status |= ehci_port_speed(ehci, temp1);
status |= USB_PORT_STAT_HIGH_SPEED;
} else
//status |= ehci_port_speed(ehci, temp);
status |= USB_PORT_STAT_HIGH_SPEED;
}
if (temp & PORT_PE)
status |= USB_PORT_STAT_ENABLE;
/* maybe the port was unsuspended without our knowledge */
//if (temp & (PORT_SUSPEND|PORT_RESUME)) {
// status |= USB_PORT_STAT_SUSPEND;
//} else if (usb_test_bit(wIndex, &ehci->suspended_ports)) {
// usb_clear_bit(wIndex, &ehci->suspended_ports);
// usb_clear_bit(wIndex, &ehci->resuming_ports);
// ehci->reset_done[wIndex] = 0;
// if (temp & PORT_PE)
// usb_set_bit(wIndex, &ehci->port_c_suspend);
// usb_hcd_end_port_resume(&hcd->self, wIndex);
//}
if (temp & PORT_OC)
status |= USB_PORT_STAT_OVERCURRENT;
if (temp & PORT_RESET)
status |= USB_PORT_STAT_RESET;
if (temp & PORT_POWER)
status |= USB_PORT_STAT_POWER;
if (usb_test_bit(wIndex, (volatile uint32_t *)&ehci->port_c_suspend))
status |= USB_PORT_STAT_C_SUSPEND << 16;
//if (status & ~0xffff) /* only if wPortChange is interesting */
//ehci_dbg("GetStatus", wIndex + 1, temp);
//put_unaligned_le32(status, buf);
*(u32 *)buf = status;
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_LOCAL_POWER:
case C_HUB_OVER_CURRENT:
/* no hub-wide feature/status flags */
break;
default:
goto error;
}
break;
case SetPortFeature:
selector = wIndex >> 8;
wIndex &= 0xff;
//if (unlikely(ehci->debug)) {
// /* If the debug port is active any port
// * feature requests should get denied */
// if (wIndex == HCS_DEBUG_PORT(ehci->hcs_params) &&
// (readl(&ehci->debug->control) & DBGP_ENABLED)) {
// retval = -ENODEV;
// goto error_exit;
// }
//}
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
temp = ehci_readl(ehci, status_reg);
if (temp & PORT_OWNER)
break;
temp &= ~PORT_RWC_BITS;
switch (wValue) {
case USB_PORT_FEAT_SUSPEND:
if (ehci->no_selective_suspend)
break;
if ((temp & PORT_PE) == 0
|| (temp & PORT_RESET) != 0)
goto error;
/* After above check the port must be connected.
* Set appropriate bit thus could put phy into low power
* mode if we have tdi_phy_lpm feature
*/
temp &= ~PORT_WKCONN_E;
temp |= PORT_WKDISC_E | PORT_WKOC_E;
ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
if (ehci->has_tdi_phy_lpm) {
hal_spin_unlock_irqrestore(&ehci->lock, flags);
hal_msleep(5);/* 5ms for HCD enter low pwr mode */
flags = hal_spin_lock_irqsave(&ehci->lock);
temp1 = ehci_readl(ehci, hostpc_reg);
ehci_writel(ehci, temp1 | HOSTPC_PHCD,
hostpc_reg);
temp1 = ehci_readl(ehci, hostpc_reg);
ehci_dbg("Port%d phy low pwr mode %s\n",
wIndex, (temp1 & HOSTPC_PHCD) ?
"succeeded" : "failed");
}
usb_set_bit(wIndex, (volatile uint32_t *)&ehci->suspended_ports);
break;
case USB_PORT_FEAT_POWER:
//if (HCS_PPC(ehci->hcs_params)) {
// hal_spin_unlock_irqrestore(flags);
// ehci_port_power(ehci, wIndex, true);
// flags = hal_spin_lock_irqsave();
//}
break;
case USB_PORT_FEAT_RESET:
if (temp & (PORT_SUSPEND|PORT_RESUME))
goto error;
/* line status bits may report this as low speed,
* which can be fine if this root hub has a
* transaction translator built in.
*/
if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
&& PORT_USB11 (temp)) {
ehci_dbg("port %d low speed --> companion\n",
wIndex + 1);
temp |= PORT_OWNER;
} else {
temp |= PORT_RESET;
temp &= ~PORT_PE;
/*
* caller must wait, then call GetPortStatus
* usb 2.0 spec says 50 ms resets on root
*/
ehci->reset_done [wIndex] = 50;
/*
* Force full-speed connect for FSL high-speed
* erratum; disable HS Chirp by setting PFSC bit
*/
if (ehci_has_fsl_hs_errata(ehci))
temp |= (1 << PORTSC_FSL_PFSC);
}
ehci_writel(ehci, temp, status_reg);
break;
/* For downstream facing ports (these): one hub port is put
* into test mode according to USB2 11.24.2.13, then the hub
* must be reset (which for root hub now means rmmod+modprobe,
* or else system reboot). See EHCI 2.3.9 and 4.14 for info
* about the EHCI-specific stuff.
*/
case USB_PORT_FEAT_TEST:
//if (!selector || selector > 5)
// goto error;
//hal_spin_unlock_irqrestore(flags);
//ehci_quiesce(ehci);
//flags = hal_spin_lock_irqsave();
///* Put all enabled ports into suspend */
//while (ports--) {
// u32 __iomem *sreg =
// &ehci->regs->port_status[ports];
// temp = ehci_readl(ehci, sreg) & ~PORT_RWC_BITS;
// if (temp & PORT_PE)
// ehci_writel(ehci, temp | PORT_SUSPEND,
// sreg);
//}
//hal_spin_unlock_irqrestore(flags);
//ehci_halt(ehci);
//flags = hal_spin_lock_irqsave();
//temp = ehci_readl(ehci, status_reg);
//temp |= selector << 16;
//ehci_writel(ehci, temp, status_reg);
break;
default:
goto error;
}
ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */
break;
default:
error:
/* "stall" on error */
retval = -EPIPE;
}
error_exit:
hal_spin_unlock_irqrestore(&ehci->lock, flags);
return retval;
}
static void ehci_relinquish_port(struct hc_gen_dev *hcd, int portnum)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
set_owner(ehci, --portnum, PORT_OWNER);
}
static int ehci_port_handed_over(struct hc_gen_dev *hcd, int portnum)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
u32 *reg;
reg = &ehci->regs->port_status[portnum - 1];
return ehci_readl(ehci, reg) & PORT_OWNER;
}
static int ehci_port_power(struct ehci_hcd *ehci, int portnum, bool enable)
{
struct hc_gen_dev *hcd = ehci_to_hcd(ehci);
u32 *status_reg = &ehci->regs->port_status[portnum];
u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
if (enable)
ehci_writel(ehci, temp | PORT_POWER, status_reg);
else
ehci_writel(ehci, temp & ~PORT_POWER, status_reg);
//if (hcd->driver->port_power)
// hcd->driver->port_power(hcd, portnum, enable);
return 0;
}