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openwrt-xburst/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
juhosg 1533187684 [adm5120] checkin a new, experimental USB driver
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8905 3c298f89-4303-0410-b956-a3cf2f4a3e73
2007-09-21 07:32:19 +00:00

771 lines
20 KiB
C

/*
* OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
*
* This file is licenced under GPL
*/
/*-------------------------------------------------------------------------*/
/*
* OHCI Root Hub ... the nonsharable stuff
*/
#define dbg_port(hc,label,num,value) \
admhc_dbg(hc, \
"%s port%d " \
"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
label, num, temp, \
(temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
(temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
(temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
(temp & ADMHC_PS_PESC) ? " PESC" : "", \
(temp & ADMHC_PS_CSC) ? " CSC" : "", \
\
(temp & ADMHC_PS_LSDA) ? " LSDA" : "", \
(temp & ADMHC_PS_PPS) ? " PPS" : "", \
(temp & ADMHC_PS_PRS) ? " PRS" : "", \
(temp & ADMHC_PS_POCI) ? " POCI" : "", \
(temp & ADMHC_PS_PSS) ? " PSS" : "", \
\
(temp & ADMHC_PS_PES) ? " PES" : "", \
(temp & ADMHC_PS_CCS) ? " CCS" : "" \
);
#define dbg_port_write(hc,label,num,value) \
admhc_dbg(hc, \
"%s port%d " \
"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
label, num, temp, \
(temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
(temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
(temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
(temp & ADMHC_PS_PESC) ? " PESC" : "", \
(temp & ADMHC_PS_CSC) ? " CSC" : "", \
\
(temp & ADMHC_PS_CPP) ? " CPP" : "", \
(temp & ADMHC_PS_SPP) ? " SPP" : "", \
(temp & ADMHC_PS_SPR) ? " SPR" : "", \
(temp & ADMHC_PS_CPS) ? " CPS" : "", \
(temp & ADMHC_PS_SPS) ? " SPS" : "", \
\
(temp & ADMHC_PS_SPE) ? " SPE" : "", \
(temp & ADMHC_PS_CPE) ? " CPE" : "" \
);
/*-------------------------------------------------------------------------*/
/* hcd->hub_irq_enable() */
static void admhc_rhsc_enable(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
spin_lock_irq(&ahcd->lock);
if (!ahcd->autostop)
del_timer(&hcd->rh_timer); /* Prevent next poll */
admhc_intr_enable(ahcd, ADMHC_INTR_INSM);
spin_unlock_irq(&ahcd->lock);
}
#define OHCI_SCHED_ENABLES \
(OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE)
#ifdef CONFIG_PM
static int admhc_restart(struct admhcd *ahcd);
static int admhc_rh_suspend(struct admhcd *ahcd, int autostop)
__releases(ahcd->lock)
__acquires(ahcd->lock)
{
int status = 0;
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_RESUME:
admhc_dbg(ahcd, "resume/suspend?\n");
ahcd->hc_control &= ~OHCI_CTRL_HCFS;
ahcd->hc_control |= OHCI_USB_RESET;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
/* FALL THROUGH */
case OHCI_USB_RESET:
status = -EBUSY;
admhc_dbg(ahcd, "needs reinit!\n");
goto done;
case OHCI_USB_SUSPEND:
if (!ahcd->autostop) {
admhc_dbg(ahcd, "already suspended\n");
goto done;
}
}
admhc_dbg(ahcd, "%s root hub\n",
autostop ? "auto-stop" : "suspend");
/* First stop any processing */
if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) {
ahcd->hc_control &= ~OHCI_SCHED_ENABLES;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus);
/* sched disables take effect on the next frame,
* then the last WDH could take 6+ msec
*/
admhc_dbg(ahcd, "stopping schedules ...\n");
ahcd->autostop = 0;
spin_unlock_irq (&ahcd->lock);
msleep (8);
spin_lock_irq (&ahcd->lock);
}
dl_done_list (ahcd);
finish_unlinks (ahcd, admhc_frame_no(ahcd));
/* maybe resume can wake root hub */
if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) ||
autostop)
ahcd->hc_control |= OHCI_CTRL_RWE;
else {
admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable);
ahcd->hc_control &= ~OHCI_CTRL_RWE;
}
/* Suspend hub ... this is the "global (to this bus) suspend" mode,
* which doesn't imply ports will first be individually suspended.
*/
ahcd->hc_control &= ~OHCI_CTRL_HCFS;
ahcd->hc_control |= OHCI_USB_SUSPEND;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
/* no resumes until devices finish suspending */
if (!autostop) {
ahcd->next_statechange = jiffies + msecs_to_jiffies (5);
ahcd->autostop = 0;
}
done:
return status;
}
static inline struct ed *find_head(struct ed *ed)
{
/* for bulk and control lists */
while (ed->ed_prev)
ed = ed->ed_prev;
return ed;
}
/* caller has locked the root hub */
static int admhc_rh_resume(struct admhcd *ahcd)
__releases(ahcd->lock)
__acquires(ahcd->lock)
{
struct usb_hcd *hcd = admhcd_to_hcd (ahcd);
u32 temp, enables;
int status = -EINPROGRESS;
int autostopped = ahcd->autostop;
ahcd->autostop = 0;
ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control);
if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
/* this can happen after resuming a swsusp snapshot */
if (hcd->state == HC_STATE_RESUMING) {
admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n",
ahcd->hc_control);
status = -EBUSY;
/* this happens when pmcore resumes HC then root */
} else {
admhc_dbg(ahcd, "duplicate resume\n");
status = 0;
}
} else switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_SUSPEND:
ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES);
ahcd->hc_control |= OHCI_USB_RESUME;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
admhc_dbg(ahcd, "%s root hub\n",
autostopped ? "auto-start" : "resume");
break;
case OHCI_USB_RESUME:
/* HCFS changes sometime after INTR_RD */
admhc_dbg(ahcd, "%swakeup root hub\n",
autostopped ? "auto-" : "");
break;
case OHCI_USB_OPER:
/* this can happen after resuming a swsusp snapshot */
admhc_dbg(ahcd, "snapshot resume? reinit\n");
status = -EBUSY;
break;
default: /* RESET, we lost power */
admhc_dbg(ahcd, "lost power\n");
status = -EBUSY;
}
if (status == -EBUSY) {
if (!autostopped) {
spin_unlock_irq (&ahcd->lock);
(void) ahcd_init (ahcd);
status = admhc_restart (ahcd);
spin_lock_irq (&ahcd->lock);
}
return status;
}
if (status != -EINPROGRESS)
return status;
if (autostopped)
goto skip_resume;
spin_unlock_irq (&ahcd->lock);
/* Some controllers (lucent erratum) need extra-long delays */
msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1);
temp = admhc_readl(ahcd, &ahcd->regs->control);
temp &= OHCI_CTRL_HCFS;
if (temp != OHCI_USB_RESUME) {
admhc_err (ahcd, "controller won't resume\n");
spin_lock_irq(&ahcd->lock);
return -EBUSY;
}
/* disable old schedule state, reinit from scratch */
admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead);
admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent);
admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead);
admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent);
admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent);
admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca);
/* Sometimes PCI D3 suspend trashes frame timings ... */
periodic_reinit(ahcd);
/* the following code is executed with ahcd->lock held and
* irqs disabled if and only if autostopped is true
*/
skip_resume:
/* interrupts might have been disabled */
admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable);
if (ahcd->ed_rm_list)
admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable);
/* Then re-enable operations */
admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
if (!autostopped)
msleep (3);
temp = ahcd->hc_control;
temp &= OHCI_CTRL_RWC;
temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
ahcd->hc_control = temp;
admhc_writel(ahcd, temp, &ahcd->regs->control);
(void) admhc_readl(ahcd, &ahcd->regs->control);
/* TRSMRCY */
if (!autostopped) {
msleep (10);
spin_lock_irq (&ahcd->lock);
}
/* now ahcd->lock is always held and irqs are always disabled */
/* keep it alive for more than ~5x suspend + resume costs */
ahcd->next_statechange = jiffies + STATECHANGE_DELAY;
/* maybe turn schedules back on */
enables = 0;
temp = 0;
if (!ahcd->ed_rm_list) {
if (ahcd->ed_controltail) {
admhc_writel(ahcd,
find_head (ahcd->ed_controltail)->dma,
&ahcd->regs->ed_controlhead);
enables |= OHCI_CTRL_CLE;
temp |= OHCI_CLF;
}
if (ahcd->ed_bulktail) {
admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma,
&ahcd->regs->ed_bulkhead);
enables |= OHCI_CTRL_BLE;
temp |= OHCI_BLF;
}
}
if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs)
enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE;
if (enables) {
admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables);
ahcd->hc_control |= enables;
admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control);
if (temp)
admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus);
(void) admhc_readl(ahcd, &ahcd->regs->control);
}
return 0;
}
static int admhc_bus_suspend(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int rc;
spin_lock_irq(&ahcd->lock);
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
rc = -ESHUTDOWN;
else
rc = admhc_rh_suspend (ahcd, 0);
spin_unlock_irq(&ahcd->lock);
return rc;
}
static int admhc_bus_resume(struct usb_hcd *hcd)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int rc;
if (time_before(jiffies, ahcd->next_statechange))
msleep(5);
spin_lock_irq (&ahcd->lock);
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
rc = -ESHUTDOWN;
else
rc = admhc_rh_resume (ahcd);
spin_unlock_irq(&ahcd->lock);
/* poll until we know a device is connected or we autostop */
if (rc == 0)
usb_hcd_poll_rh_status(hcd);
return rc;
}
/* Carry out polling-, autostop-, and autoresume-related state changes */
static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
int any_connected)
{
int poll_rh = 1;
switch (ahcd->hc_control & OHCI_CTRL_HCFS) {
case OHCI_USB_OPER:
/* keep on polling until we know a device is connected
* and RHSC is enabled */
if (!ahcd->autostop) {
if (any_connected ||
!device_may_wakeup(&admhcd_to_hcd(ahcd)
->self.root_hub->dev)) {
if (admhc_readl(ahcd, &ahcd->regs->int_enable) &
OHCI_INTR_RHSC)
poll_rh = 0;
} else {
ahcd->autostop = 1;
ahcd->next_statechange = jiffies + HZ;
}
/* if no devices have been attached for one second, autostop */
} else {
if (changed || any_connected) {
ahcd->autostop = 0;
ahcd->next_statechange = jiffies +
STATECHANGE_DELAY;
} else if (time_after_eq(jiffies,
ahcd->next_statechange)
&& !ahcd->ed_rm_list
&& !(ahcd->hc_control &
OHCI_SCHED_ENABLES)) {
ahcd_rh_suspend(ahcd, 1);
}
}
break;
/* if there is a port change, autostart or ask to be resumed */
case OHCI_USB_SUSPEND:
case OHCI_USB_RESUME:
if (changed) {
if (ahcd->autostop)
admhc_rh_resume(ahcd);
else
usb_hcd_resume_root_hub(admhcd_to_hcd(ahcd));
} else {
/* everything is idle, no need for polling */
poll_rh = 0;
}
break;
}
return poll_rh;
}
#else /* CONFIG_PM */
static inline int admhc_rh_resume(struct admhcd *ahcd)
{
return 0;
}
/* Carry out polling-related state changes.
* autostop isn't used when CONFIG_PM is turned off.
*/
static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed,
int any_connected)
{
int poll_rh = 1;
/* keep on polling until RHSC is enabled */
if (admhc_readl(ahcd, &ahcd->regs->int_enable) & ADMHC_INTR_INSM)
poll_rh = 0;
return poll_rh;
}
#endif /* CONFIG_PM */
/*-------------------------------------------------------------------------*/
/* build "status change" packet (one or two bytes) from HC registers */
static int
admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int i, changed = 0, length = 1;
int any_connected = 0;
unsigned long flags;
u32 status;
spin_lock_irqsave(&ahcd->lock, flags);
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
goto done;
/* init status */
status = admhc_get_rhdesc(ahcd);
if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
buf [0] = changed = 1;
else
buf [0] = 0;
if (ahcd->num_ports > 7) {
buf [1] = 0;
length++;
}
/* look at each port */
for (i = 0; i < ahcd->num_ports; i++) {
status = admhc_get_portstatus(ahcd, i);
/* can't autostop if ports are connected */
any_connected |= (status & ADMHC_PS_CCS);
if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
| ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
changed = 1;
if (i < 7)
buf [0] |= 1 << (i + 1);
else
buf [1] |= 1 << (i - 7);
}
}
hcd->poll_rh = admhc_root_hub_state_changes(ahcd, changed,
any_connected);
done:
spin_unlock_irqrestore(&ahcd->lock, flags);
return changed ? length : 0;
}
/*-------------------------------------------------------------------------*/
static void admhc_hub_descriptor(struct admhcd *ahcd,
struct usb_hub_descriptor *desc)
{
u32 rh = admhc_get_rhdesc(ahcd);
u16 temp;
desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
desc->bHubContrCurrent = 0x00; /* 0mA */
desc->bNbrPorts = ahcd->num_ports;
temp = 1 + (ahcd->num_ports / 8);
desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
/* FIXME */
temp = 0;
if (rh & ADMHC_RH_NPS) /* no power switching? */
temp |= 0x0002;
if (rh & ADMHC_RH_PSM) /* per-port power switching? */
temp |= 0x0001;
if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
temp |= 0x0010;
else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
temp |= 0x0008;
desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
/* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */
desc->bitmap [0] = 0;
desc->bitmap [0] = ~0;
}
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_USB_OTG
static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
{
struct admhcd *ahcd = hcd_to_admhcd(hcd);
u32 status;
if (!port)
return -EINVAL;
port--;
/* start port reset before HNP protocol times out */
status = admhc_readl(ahcd, &ahcd->regs->portstatus[port]);
if (!(status & ADMHC_PS_CCS))
return -ENODEV;
/* khubd will finish the reset later */
admhc_writel(ahcd, ADMHC_PS_PRS, &ahcd->regs->portstatus[port]);
return 0;
}
static void start_hnp(struct admhcd *ahcd);
#else
#define admhc_start_port_reset NULL
#endif
/*-------------------------------------------------------------------------*/
/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
* not necessarily continuous ... to guard against resume signaling.
* The short timeout is safe for non-root hubs, and is backward-compatible
* with earlier Linux hosts.
*/
#ifdef CONFIG_USB_SUSPEND
#define PORT_RESET_MSEC 50
#else
#define PORT_RESET_MSEC 10
#endif
/* this timer value might be vendor-specific ... */
#define PORT_RESET_HW_MSEC 10
/* wrap-aware logic morphed from <linux/jiffies.h> */
#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
/* called from some task, normally khubd */
static inline int root_port_reset(struct admhcd *ahcd, unsigned port)
{
#if 0
/* FIXME: revert to this when frame numbers are updated */
__hc32 __iomem *portstat = &ahcd->regs->portstatus[port];
u32 temp;
u16 now = admhc_readl(ahcd, &ahcd->regs->fmnumber);
u16 reset_done = now + PORT_RESET_MSEC;
/* build a "continuous enough" reset signal, with up to
* 3msec gap between pulses. scheduler HZ==100 must work;
* this might need to be deadline-scheduled.
*/
do {
/* spin until any current reset finishes */
for (;;) {
temp = admhc_readl(ahcd, portstat);
/* handle e.g. CardBus eject */
if (temp == ~(u32)0)
return -ESHUTDOWN;
if (!(temp & ADMHC_PS_PRS))
break;
udelay (500);
}
if (!(temp & ADMHC_PS_CCS))
break;
if (temp & ADMHC_PS_PRSC)
admhc_writel(ahcd, ADMHC_PS_PRSC, portstat);
/* start the next reset, sleep till it's probably done */
admhc_writel(ahcd, ADMHC_PS_PRS, portstat);
msleep(PORT_RESET_HW_MSEC);
now = admhc_readl(ahcd, &ahcd->regs->fmnumber);
} while (tick_before(now, reset_done));
/* caller synchronizes using PRSC */
#else
__hc32 __iomem *portstat = &ahcd->regs->portstatus[port];
u32 temp;
unsigned long reset_done = jiffies + msecs_to_jiffies(PORT_RESET_MSEC);
/* build a "continuous enough" reset signal, with up to
* 3msec gap between pulses. scheduler HZ==100 must work;
* this might need to be deadline-scheduled.
*/
do {
/* spin until any current reset finishes */
for (;;) {
temp = admhc_readl(ahcd, portstat);
/* handle e.g. CardBus eject */
if (temp == ~(u32)0)
return -ESHUTDOWN;
if (!(temp & ADMHC_PS_PRS))
break;
udelay (500);
}
if (!(temp & ADMHC_PS_CCS))
break;
if (temp & ADMHC_PS_PRSC)
admhc_writel(ahcd, ADMHC_PS_PRSC, portstat);
/* start the next reset, sleep till it's probably done */
admhc_writel(ahcd, ADMHC_PS_PRS, portstat);
msleep(PORT_RESET_HW_MSEC);
} while (time_before(jiffies, reset_done));
admhc_writel(ahcd, ADMHC_PS_SPE | ADMHC_PS_CSC, portstat);
msleep(100);
#endif
return 0;
}
static int admhc_hub_control (
struct usb_hcd *hcd,
u16 typeReq,
u16 wValue,
u16 wIndex,
char *buf,
u16 wLength
) {
struct admhcd *ahcd = hcd_to_admhcd(hcd);
int ports = hcd_to_bus (hcd)->root_hub->maxchild;
u32 temp;
int retval = 0;
if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
return -ESHUTDOWN;
switch (typeReq) {
case ClearHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
#if 0 /* FIXME */
admhc_writel(ahcd, ADMHC_RH_OCIC,
&ahcd->regs->roothub.status);
#endif
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case ClearPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
temp = ADMHC_PS_CPE;
break;
case USB_PORT_FEAT_SUSPEND:
temp = ADMHC_PS_CPS;
break;
case USB_PORT_FEAT_POWER:
temp = ADMHC_PS_CPP;
break;
case USB_PORT_FEAT_C_CONNECTION:
temp = ADMHC_PS_CSC;
break;
case USB_PORT_FEAT_C_ENABLE:
temp = ADMHC_PS_PESC;
break;
case USB_PORT_FEAT_C_SUSPEND:
temp = ADMHC_PS_PSSC;
break;
case USB_PORT_FEAT_C_OVER_CURRENT:
temp = ADMHC_PS_OCIC;
break;
case USB_PORT_FEAT_C_RESET:
temp = ADMHC_PS_PRSC;
break;
default:
goto error;
}
admhc_writel(ahcd, temp, &ahcd->regs->portstatus[wIndex]);
break;
case GetHubDescriptor:
admhc_hub_descriptor(ahcd, (struct usb_hub_descriptor *) buf);
break;
case GetHubStatus:
temp = admhc_get_rhdesc(ahcd);
temp &= ~(ADMHC_RH_CRWE | ADMHC_RH_DRWE);
put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
break;
case GetPortStatus:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
temp = admhc_get_portstatus(ahcd, wIndex);
put_unaligned(cpu_to_le32 (temp), (__le32 *) buf);
dbg_port(ahcd, "GetPortStatus", wIndex, temp);
break;
case SetHubFeature:
switch (wValue) {
case C_HUB_OVER_CURRENT:
// FIXME: this can be cleared, yes?
case C_HUB_LOCAL_POWER:
break;
default:
goto error;
}
break;
case SetPortFeature:
if (!wIndex || wIndex > ports)
goto error;
wIndex--;
switch (wValue) {
case USB_PORT_FEAT_ENABLE:
admhc_writel(ahcd, ADMHC_PS_SPE,
&ahcd->regs->portstatus[wIndex]);
break;
case USB_PORT_FEAT_SUSPEND:
#ifdef CONFIG_USB_OTG
if (hcd->self.otg_port == (wIndex + 1)
&& hcd->self.b_hnp_enable)
start_hnp(ahcd);
else
#endif
admhc_writel(ahcd, ADMHC_PS_SPS,
&ahcd->regs->portstatus[wIndex]);
break;
case USB_PORT_FEAT_POWER:
admhc_writel(ahcd, ADMHC_PS_SPP,
&ahcd->regs->portstatus[wIndex]);
break;
case USB_PORT_FEAT_RESET:
retval = root_port_reset(ahcd, wIndex);
break;
default:
goto error;
}
break;
default:
error:
/* "protocol stall" on error */
retval = -EPIPE;
}
return retval;
}