C++ spin_lock_irqsave函数代码示例

static int next_getadapter_fib(struct aac_dev * dev, void __user *arg)
{
	struct fib_ioctl f;
	struct fib *fib;
	struct aac_fib_context *fibctx;
	int status;
	struct list_head * entry;
	unsigned long flags;

	if(copy_from_user((void *)&f, arg, sizeof(struct fib_ioctl)))
		return -EFAULT;
	/*
	 *	Verify that the HANDLE passed in was a valid AdapterFibContext
	 *
	 *	Search the list of AdapterFibContext addresses on the adapter
	 *	to be sure this is a valid address
	 */
	spin_lock_irqsave(&dev->fib_lock, flags);
	entry = dev->fib_list.next;
	fibctx = NULL;

	while (entry != &dev->fib_list) {
		fibctx = list_entry(entry, struct aac_fib_context, next);
		/*
		 *	Extract the AdapterFibContext from the Input parameters.
		 */
		if (fibctx->unique == f.fibctx) { /* We found a winner */
			break;
		}
		entry = entry->next;
		fibctx = NULL;
	}
	if (!fibctx) {
		spin_unlock_irqrestore(&dev->fib_lock, flags);
		dprintk ((KERN_INFO "Fib Context not found\n"));
		return -EINVAL;
	}

	if((fibctx->type != FSAFS_NTC_GET_ADAPTER_FIB_CONTEXT) ||
		 (fibctx->size != sizeof(struct aac_fib_context))) {
		spin_unlock_irqrestore(&dev->fib_lock, flags);
		dprintk ((KERN_INFO "Fib Context corrupt?\n"));
		return -EINVAL;
	}
	status = 0;
	/*
	 *	If there are no fibs to send back, then either wait or return
	 *	-EAGAIN
	 */
return_fib:
	if (!list_empty(&fibctx->fib_list)) {
		/*
		 *	Pull the next fib from the fibs
		 */
		entry = fibctx->fib_list.next;
		list_del(entry);

		fib = list_entry(entry, struct fib, fiblink);
		fibctx->count--;
		spin_unlock_irqrestore(&dev->fib_lock, flags);
		if (copy_to_user(f.fib, fib->hw_fib_va, sizeof(struct hw_fib))) {
			kfree(fib->hw_fib_va);
			kfree(fib);
			return -EFAULT;
		}
		/*
		 *	Free the space occupied by this copy of the fib.
		 */
		kfree(fib->hw_fib_va);
		kfree(fib);
		status = 0;
	} else {

/* 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);
//.........这里部分代码省略.........

static void capture_urb_complete(struct urb *urb)
{
	struct ua101 *ua = urb->context;
	struct ua101_stream *stream = &ua->capture;
	unsigned long flags;
	unsigned int frames, write_ptr;
	bool do_period_elapsed;
	int err;

	if (unlikely(urb->status == -ENOENT ||		/* unlinked */
		     urb->status == -ENODEV ||		/* device removed */
		     urb->status == -ECONNRESET ||	/* unlinked */
		     urb->status == -ESHUTDOWN))	/* device disabled */
		goto stream_stopped;

	if (urb->status >= 0 && urb->iso_frame_desc[0].status >= 0)
		frames = urb->iso_frame_desc[0].actual_length /
			stream->frame_bytes;
	else
		frames = 0;

	spin_lock_irqsave(&ua->lock, flags);

	if (frames > 0 && test_bit(ALSA_CAPTURE_RUNNING, &ua->states))
		do_period_elapsed = copy_capture_data(stream, urb, frames);
	else
		do_period_elapsed = false;

	if (test_bit(USB_CAPTURE_RUNNING, &ua->states)) {
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (unlikely(err < 0)) {
			spin_unlock_irqrestore(&ua->lock, flags);
			dev_err(&ua->dev->dev, "USB request error %d: %s\n",
				err, usb_error_string(err));
			goto stream_stopped;
		}

		/* append packet size to FIFO */
		write_ptr = ua->rate_feedback_start;
		add_with_wraparound(ua, &write_ptr, ua->rate_feedback_count);
		ua->rate_feedback[write_ptr] = frames;
		if (ua->rate_feedback_count < ua->playback.queue_length) {
			ua->rate_feedback_count++;
			if (ua->rate_feedback_count ==
						ua->playback.queue_length)
				wake_up(&ua->rate_feedback_wait);
		} else {
			/*
			 * Ring buffer overflow; this happens when the playback
			 * stream is not running.  Throw away the oldest entry,
			 * so that the playback stream, when it starts, sees
			 * the most recent packet sizes.
			 */
			add_with_wraparound(ua, &ua->rate_feedback_start, 1);
		}
		if (test_bit(USB_PLAYBACK_RUNNING, &ua->states) &&
		    !list_empty(&ua->ready_playback_urbs))
			tasklet_schedule(&ua->playback_tasklet);
	}

	spin_unlock_irqrestore(&ua->lock, flags);

	if (do_period_elapsed)
		snd_pcm_period_elapsed(stream->substream);

	return;

stream_stopped:
	abort_usb_playback(ua);
	abort_usb_capture(ua);
	abort_alsa_playback(ua);
	abort_alsa_capture(ua);
}

int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
		u16 wIndex, char *buf, u16 wLength)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports;
	unsigned long flags;
	u32 temp, status;
	int retval = 0;
	__le32 __iomem **port_array;
	int slot_id;
	struct xhci_bus_state *bus_state;
	u16 link_state = 0;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	spin_lock_irqsave(&xhci->lock, flags);
	switch (typeReq) {
	case GetHubStatus:
		/* No power source, over-current reported per port */
		memset(buf, 0, 4);
		break;
	case GetHubDescriptor:
		/* Check to make sure userspace is asking for the USB 3.0 hub
		 * descriptor for the USB 3.0 roothub.  If not, we stall the
		 * endpoint, like external hubs do.
		 */
		if (hcd->speed == HCD_USB3 &&
				(wLength < USB_DT_SS_HUB_SIZE ||
				 wValue != (USB_DT_SS_HUB << 8))) {
			xhci_dbg(xhci, "Wrong hub descriptor type for "
					"USB 3.0 roothub.\n");
			goto error;
		}
		xhci_hub_descriptor(hcd, xhci,
				(struct usb_hub_descriptor *) buf);
		break;
	case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
		if ((wValue & 0xff00) != (USB_DT_BOS << 8))
			goto error;

		if (hcd->speed != HCD_USB3)
			goto error;

		memcpy(buf, &usb_bos_descriptor,
				USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE);
		temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
		buf[12] = HCS_U1_LATENCY(temp);
		put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]);

		spin_unlock_irqrestore(&xhci->lock, flags);
		return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE;
	case GetPortStatus:
		if (!wIndex || wIndex > max_ports)
			goto error;
		wIndex--;
		status = 0;
		temp = xhci_readl(xhci, port_array[wIndex]);
		if (temp == 0xffffffff) {
			retval = -ENODEV;
			break;
		}
		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);

		/* 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))
			status |= USB_PORT_STAT_C_OVERCURRENT << 16;
		if ((temp & PORT_RC))
			status |= USB_PORT_STAT_C_RESET << 16;
		/* USB3.0 only */
		if (hcd->speed == HCD_USB3) {
			if ((temp & PORT_PLC))
				status |= USB_PORT_STAT_C_LINK_STATE << 16;
			if ((temp & PORT_WRC))
				status |= USB_PORT_STAT_C_BH_RESET << 16;
		}

		if (hcd->speed != HCD_USB3) {
			if ((temp & PORT_PLS_MASK) == XDEV_U3
					&& (temp & PORT_POWER))
				status |= USB_PORT_STAT_SUSPEND;
		}
		if ((temp & PORT_PLS_MASK) == XDEV_RESUME &&
				!DEV_SUPERSPEED(temp)) {
			if ((temp & PORT_RESET) || !(temp & PORT_PE))
				goto error;
			if (time_after_eq(jiffies,
					bus_state->resume_done[wIndex])) {
				xhci_dbg(xhci, "Resume USB2 port %d\n",
					wIndex + 1);
				bus_state->resume_done[wIndex] = 0;
				xhci_set_link_state(xhci, port_array, wIndex,
							XDEV_U0);
				xhci_dbg(xhci, "set port %d resume\n",
					wIndex + 1);
				slot_id = xhci_find_slot_id_by_port(hcd, xhci,
//.........这里部分代码省略.........

int xhci_bus_resume(struct usb_hcd *hcd)
{
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
	int max_ports, port_index;
	__le32 __iomem **port_array;
	struct xhci_bus_state *bus_state;
	u32 temp;
	unsigned long flags;

	max_ports = xhci_get_ports(hcd, &port_array);
	bus_state = &xhci->bus_state[hcd_index(hcd)];

	if (time_before(jiffies, bus_state->next_statechange))
		msleep(5);

	spin_lock_irqsave(&xhci->lock, flags);
	if (!HCD_HW_ACCESSIBLE(hcd)) {
		spin_unlock_irqrestore(&xhci->lock, flags);
		return -ESHUTDOWN;
	}

	/* delay the irqs */
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp &= ~CMD_EIE;
	xhci_writel(xhci, temp, &xhci->op_regs->command);

	port_index = max_ports;
	while (port_index--) {
		/* Check whether need resume ports. If needed
		   resume port and disable remote wakeup */
		u32 temp;
		int slot_id;

		temp = xhci_readl(xhci, port_array[port_index]);
		if (DEV_SUPERSPEED(temp))
			temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
		else
			temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
		if (test_bit(port_index, &bus_state->bus_suspended) &&
		    (temp & PORT_PLS_MASK)) {
			if (DEV_SUPERSPEED(temp)) {
				xhci_set_link_state(xhci, port_array,
							port_index, XDEV_U0);
			} else {
				xhci_set_link_state(xhci, port_array,
						port_index, XDEV_RESUME);

				spin_unlock_irqrestore(&xhci->lock, flags);
				msleep(20);
				spin_lock_irqsave(&xhci->lock, flags);

				xhci_set_link_state(xhci, port_array,
							port_index, XDEV_U0);
			}
			/* wait for the port to enter U0 and report port link
			 * state change.
			 */
			spin_unlock_irqrestore(&xhci->lock, flags);
			msleep(20);
			spin_lock_irqsave(&xhci->lock, flags);

			/* Clear PLC */
			xhci_test_and_clear_bit(xhci, port_array, port_index,
						PORT_PLC);

			slot_id = xhci_find_slot_id_by_port(hcd,
					xhci, port_index + 1);
			if (slot_id)
				xhci_ring_device(xhci, slot_id);
		} else
			xhci_writel(xhci, temp, port_array[port_index]);

		if (hcd->speed != HCD_USB3) {
			/* disable remote wake up for USB 2.0 */
			__le32 __iomem *addr;
			u32 tmp;

			/* Add one to the port status register address to get
			 * the port power control register address.
			 */
			addr = port_array[port_index] + 1;
			tmp = xhci_readl(xhci, addr);
			tmp &= ~PORT_RWE;
			xhci_writel(xhci, tmp, addr);
		}
	}

	(void) xhci_readl(xhci, &xhci->op_regs->command);

	bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
	/* re-enable irqs */
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp |= CMD_EIE;
	xhci_writel(xhci, temp, &xhci->op_regs->command);
	temp = xhci_readl(xhci, &xhci->op_regs->command);

	spin_unlock_irqrestore(&xhci->lock, flags);
	return 0;
}

static void musb_id_pin_work(struct work_struct *data)
{
	u8 devctl = 0;
	unsigned long flags;

	spin_lock_irqsave(&mtk_musb->lock, flags);
	musb_generic_disable(mtk_musb);
	spin_unlock_irqrestore(&mtk_musb->lock, flags);

	down(&mtk_musb->musb_lock);
	DBG(0, "work start, is_host=%d, boot mode(%d)\n", mtk_musb->is_host, get_boot_mode());
#ifdef CONFIG_MTK_KERNEL_POWER_OFF_CHARGING
	if (get_boot_mode() == KERNEL_POWER_OFF_CHARGING_BOOT || get_boot_mode() == LOW_POWER_OFF_CHARGING_BOOT) {
		DBG(0, "do nothing due to in power off charging\n");
		goto out;
	}
#endif
	if (mtk_musb->in_ipo_off) {
		DBG(0, "do nothing due to in_ipo_off\n");
		goto out;
	}

	mtk_musb->is_host = musb_is_host();
	DBG(0, "musb is as %s\n", mtk_musb->is_host?"host":"device");
	switch_set_state((struct switch_dev *)&otg_state, mtk_musb->is_host);

	if (mtk_musb->is_host) {
		/* setup fifo for host mode */
		ep_config_from_table_for_host(mtk_musb);
		wake_lock(&mtk_musb->usb_lock);
		musb_platform_set_vbus(mtk_musb, 1);

	/* for no VBUS sensing IP*/
	#if 1
		/* wait VBUS ready */
		msleep(100);
		/* clear session*/
		devctl = musb_readb(mtk_musb->mregs, MUSB_DEVCTL);
		musb_writeb(mtk_musb->mregs, MUSB_DEVCTL, (devctl&(~MUSB_DEVCTL_SESSION)));
		/* USB MAC OFF*/
		/* VBUSVALID=0, AVALID=0, BVALID=0, SESSEND=1, IDDIG=X, IDPULLUP=1 */
		USBPHY_SET8(0x6c, 0x11);
		USBPHY_CLR8(0x6c, 0x2e);
		USBPHY_SET8(0x6d, 0x3f);
		DBG(0, "force PHY to idle, 0x6d=%x, 0x6c=%x\n", USBPHY_READ8(0x6d), USBPHY_READ8(0x6c));
		/* wait */
		mdelay(5);
		/* restart session */
		devctl = musb_readb(mtk_musb->mregs, MUSB_DEVCTL);
		musb_writeb(mtk_musb->mregs, MUSB_DEVCTL, (devctl | MUSB_DEVCTL_SESSION));
		/* USB MAC ONand Host Mode*/
		/* VBUSVALID=1, AVALID=1, BVALID=1, SESSEND=0, IDDIG=0, IDPULLUP=1 */
		USBPHY_CLR8(0x6c, 0x10);
		USBPHY_SET8(0x6c, 0x2d);
		USBPHY_SET8(0x6d, 0x3f);
		DBG(0, "force PHY to host mode, 0x6d=%x, 0x6c=%x\n", USBPHY_READ8(0x6d), USBPHY_READ8(0x6c));
	#endif

		musb_start(mtk_musb);
		MUSB_HST_MODE(mtk_musb);
		switch_int_to_device(mtk_musb);
	} else {
		DBG(0, "devctl is %x\n", musb_readb(mtk_musb->mregs, MUSB_DEVCTL));
		musb_writeb(mtk_musb->mregs, MUSB_DEVCTL, 0);
		if (wake_lock_active(&mtk_musb->usb_lock))
			wake_unlock(&mtk_musb->usb_lock);
		musb_platform_set_vbus(mtk_musb, 0);

	/* for no VBUS sensing IP */
	#if 1
	/* USB MAC OFF*/
		/* VBUSVALID=0, AVALID=0, BVALID=0, SESSEND=1, IDDIG=X, IDPULLUP=1 */
		USBPHY_SET8(0x6c, 0x11);
		USBPHY_CLR8(0x6c, 0x2e);
		USBPHY_SET8(0x6d, 0x3f);
		DBG(0, "force PHY to idle, 0x6d=%x, 0x6c=%x\n", USBPHY_READ8(0x6d), USBPHY_READ8(0x6c));
	#endif

		musb_stop(mtk_musb);
		mtk_musb->xceiv->state = OTG_STATE_B_IDLE;
		MUSB_DEV_MODE(mtk_musb);
		switch_int_to_host(mtk_musb);
	}
out:
	DBG(0, "work end, is_host=%d\n", mtk_musb->is_host);
	up(&mtk_musb->musb_lock);

}

static ssize_t rate_control_pid_events_read(struct file *file, char __user *buf,
					    size_t length, loff_t *offset)
{
	struct rc_pid_events_file_info *file_info = file->private_data;
	struct rc_pid_event_buffer *events = file_info->events;
	struct rc_pid_event *ev;
	char pb[RC_PID_PRINT_BUF_SIZE];
	int ret;
	int p;
	unsigned long status;

	/* Check if there is something to read. */
	if (events->next_entry == file_info->next_entry) {
		if (file->f_flags & O_NONBLOCK)
			return -EAGAIN;

		/* Wait */
		ret = wait_event_interruptible(events->waitqueue,
				events->next_entry != file_info->next_entry);

		if (ret)
			return ret;
	}

	/* Write out one event per call. I don't care whether it's a little
	 * inefficient, this is debugging code anyway. */
	spin_lock_irqsave(&events->lock, status);

	/* Get an event */
	ev = &(events->ring[file_info->next_entry]);
	file_info->next_entry = (file_info->next_entry + 1) %
				RC_PID_EVENT_RING_SIZE;

	/* Print information about the event. Note that userpace needs to
	 * provide large enough buffers. */
	length = length < RC_PID_PRINT_BUF_SIZE ?
		 length : RC_PID_PRINT_BUF_SIZE;
	p = snprintf(pb, length, "%u %lu ", ev->id, ev->timestamp);
	switch (ev->type) {
	case RC_PID_EVENT_TYPE_TX_STATUS:
		p += snprintf(pb + p, length - p, "tx_status %u %u",
			      !(ev->data.flags & IEEE80211_TX_STAT_ACK),
			      ev->data.tx_status.status.rates[0].idx);
		break;
	case RC_PID_EVENT_TYPE_RATE_CHANGE:
		p += snprintf(pb + p, length - p, "rate_change %d %d",
			      ev->data.index, ev->data.rate);
		break;
	case RC_PID_EVENT_TYPE_TX_RATE:
		p += snprintf(pb + p, length - p, "tx_rate %d %d",
			      ev->data.index, ev->data.rate);
		break;
	case RC_PID_EVENT_TYPE_PF_SAMPLE:
		p += snprintf(pb + p, length - p,
			      "pf_sample %d %d %d %d",
			      ev->data.pf_sample, ev->data.prop_err,
			      ev->data.int_err, ev->data.der_err);
		break;
	}
	p += snprintf(pb + p, length - p, "\n");

	spin_unlock_irqrestore(&events->lock, status);

	if (copy_to_user(buf, pb, p))
		return -EFAULT;

	return p;
}

int mpc5200_psc_ac97_gpio_reset(int psc_number)
{
	unsigned long flags;
	u32 gpio;
	u32 mux;
	int out;
	int reset;
	int sync;

	if ((!simple_gpio) || (!wkup_gpio))
		return -ENODEV;

	switch (psc_number) {
	case 0:
		reset   = PSC1_RESET;           
		sync    = PSC1_SYNC;            
		out     = PSC1_SDATA_OUT;       
		gpio    = MPC52xx_GPIO_PSC1_MASK;
		break;
	case 1:
		reset   = PSC2_RESET;           
		sync    = PSC2_SYNC;            
		out     = PSC2_SDATA_OUT;       
		gpio    = MPC52xx_GPIO_PSC2_MASK;
		break;
	default:
		pr_err(__FILE__ ": Unable to determine PSC, no ac97 "
		       "cold-reset will be performed\n");
		return -ENODEV;
	}

	spin_lock_irqsave(&gpio_lock, flags);

	
	mux = in_be32(&simple_gpio->port_config);
	out_be32(&simple_gpio->port_config, mux & (~gpio));

	
	setbits8(&wkup_gpio->wkup_gpioe, reset);
	setbits32(&simple_gpio->simple_gpioe, sync | out);

	setbits8(&wkup_gpio->wkup_ddr, reset);
	setbits32(&simple_gpio->simple_ddr, sync | out);

	
	clrbits32(&simple_gpio->simple_dvo, sync | out);
	clrbits8(&wkup_gpio->wkup_dvo, reset);

	
	udelay(1);

	
	setbits8(&wkup_gpio->wkup_dvo, reset);

	
	
	__delay(7);

	
	out_be32(&simple_gpio->port_config, mux);

	spin_unlock_irqrestore(&gpio_lock, flags);

	return 0;
}

static void
serial8250_set_termios(struct uart_port *port, struct termios *termios,
		       struct termios *old)
{
	struct uart_8250_port *up = (struct uart_8250_port *)port;
	unsigned char cval, fcr = 0;
	unsigned long flags;
	unsigned int baud, quot;

	switch (termios->c_cflag & CSIZE) {
	case CS5:
		cval = 0x00;
		break;
	case CS6:
		cval = 0x01;
		break;
	case CS7:
		cval = 0x02;
		break;
	default:
	case CS8:
		cval = 0x03;
		break;
	}

	if (termios->c_cflag & CSTOPB)
		cval |= 0x04;
	if (termios->c_cflag & PARENB)
		cval |= UART_LCR_PARITY;
	if (!(termios->c_cflag & PARODD))
		cval |= UART_LCR_EPAR;
#ifdef CMSPAR
	if (termios->c_cflag & CMSPAR)
		cval |= UART_LCR_SPAR;
#endif

	/*
	 * Ask the core to calculate the divisor for us.
	 */
	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
	quot = serial8250_get_divisor(port, baud);
	quot = 0x35; /* FIXME */

	/*
	 * Work around a bug in the Oxford Semiconductor 952 rev B
	 * chip which causes it to seriously miscalculate baud rates
	 * when DLL is 0.
	 */
	if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 &&
	    up->rev == 0x5201)
		quot ++;

	if (uart_config[up->port.type].flags & UART_USE_FIFO) {
		if (baud < 2400)
			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_1;
		else
			fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIGGER_8;
	}

	/*
	 * Ok, we're now changing the port state.  Do it with
	 * interrupts disabled.
	 */
	spin_lock_irqsave(&up->port.lock, flags);

	/*
	 * Update the per-port timeout.
	 */
	uart_update_timeout(port, termios->c_cflag, baud);

	up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
	if (termios->c_iflag & INPCK)
		up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
	if (termios->c_iflag & (BRKINT | PARMRK))
		up->port.read_status_mask |= UART_LSR_BI;

	/*
	 * Characteres to ignore
	 */
	up->port.ignore_status_mask = 0;
	if (termios->c_iflag & IGNPAR)
		up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
	if (termios->c_iflag & IGNBRK) {
		up->port.ignore_status_mask |= UART_LSR_BI;
		/*
		 * If we're ignoring parity and break indicators,
		 * ignore overruns too (for real raw support).
		 */
		if (termios->c_iflag & IGNPAR)
			up->port.ignore_status_mask |= UART_LSR_OE;
	}

	/*
	 * ignore all characters if CREAD is not set
	 */
	if ((termios->c_cflag & CREAD) == 0)
		up->port.ignore_status_mask |= UART_LSR_DR;

	/*
	 * CTS flow control flag and modem status interrupts
//.........这里部分代码省略.........

/**
 * mempool_alloc - allocate an element from a specific memory pool
 * @pool:      pointer to the memory pool which was allocated via
 *             mempool_create().
 * @gfp_mask:  the usual allocation bitmask.
 *
 * this function only sleeps if the alloc_fn() function sleeps or
 * returns NULL. Note that due to preallocation, this function
 * *never* fails when called from process contexts. (it might
 * fail if called from an IRQ context.)
 * Note: using __GFP_ZERO is not supported.
 */
void * mempool_alloc_MikeT(mempool_t *pool, gfp_t gfp_mask, bool count)
{
	void *element;
	unsigned long flags;
	wait_queue_t wait;
	gfp_t gfp_temp;

	VM_WARN_ON_ONCE(gfp_mask & __GFP_ZERO);
	might_sleep_if(gfp_mask & __GFP_WAIT);

	gfp_mask |= __GFP_NOMEMALLOC;	/* don't allocate emergency reserves */
	gfp_mask |= __GFP_NORETRY;	/* don't loop in __alloc_pages */
	gfp_mask |= __GFP_NOWARN;	/* failures are OK */

	gfp_temp = gfp_mask & ~(__GFP_WAIT|__GFP_IO);

repeat_alloc:

	element = pool->alloc(gfp_temp, pool->pool_data);
	if (likely(element != NULL))
		return element;

	spin_lock_irqsave(&pool->lock, flags);
	if (likely(pool->curr_nr)) {
		element = remove_element(pool);
		spin_unlock_irqrestore(&pool->lock, flags);
		/* paired with rmb in mempool_free(), read comment there */
		smp_wmb();
		/*
		 * Update the allocation stack trace as this is more useful
		 * for debugging.
		 */
		kmemleak_update_trace(element);
		return element;
	}

	/*
	 * We use gfp mask w/o __GFP_WAIT or IO for the first round.  If
	 * alloc failed with that and @pool was empty, retry immediately.
	 */
	if (gfp_temp != gfp_mask) {
		spin_unlock_irqrestore(&pool->lock, flags);
		gfp_temp = gfp_mask;
		goto repeat_alloc;
	}

	/* We must not sleep if !__GFP_WAIT */
	if (!(gfp_mask & __GFP_WAIT)) {
		spin_unlock_irqrestore(&pool->lock, flags);
		return NULL;
	}
    if(count)
        waitCounter++;
	/* Let's wait for someone else to return an element to @pool */
	init_wait(&wait);
	prepare_to_wait(&pool->wait, &wait, TASK_UNINTERRUPTIBLE);

	spin_unlock_irqrestore(&pool->lock, flags);

	/*
	 * FIXME: this should be io_schedule().  The timeout is there as a
	 * workaround for some DM problems in 2.6.18.
	 */
	io_schedule_timeout(5*HZ);

	finish_wait(&pool->wait, &wait);
	goto repeat_alloc;
}

static int serial8250_startup(struct uart_port *port)
{
	struct uart_8250_port *up = (struct uart_8250_port *)port;
	unsigned long flags;
	int retval;

	/*
	 * Clear the FIFO buffers and disable them.
	 * (they will be reeanbled in set_termios())
	 */
	if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) {
		serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
		serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
				UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
		serial_outp(up, UART_FCR, 0);
	}

	/*
	 * Clear the interrupt registers.
	 */
	(void) serial_inp(up, UART_LSR);
	(void) serial_inp(up, UART_RX);
	(void) serial_inp(up, UART_IIR);
	(void) serial_inp(up, UART_MSR);

	/*
	 * At this point, there's no way the LSR could still be 0xff;
	 * if it is, then bail out, because there's likely no UART
	 * here.
	 */
	if (!(up->port.flags & UPF_BUGGY_UART) &&
	    (serial_inp(up, UART_LSR) == 0xff)) {
		printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
		return -ENODEV;
	}

	retval = serial_link_irq_chain(up);
		if (retval)
			return retval;

	/*
	 * Now, initialize the UART
	 */
	serial_outp(up, UART_LCR, UART_LCR_WLEN8);

	spin_lock_irqsave(&up->port.lock, flags);
	if (up->port.flags & UPF_FOURPORT) {
		if (!is_real_interrupt(up->port.irq))
			up->port.mctrl |= TIOCM_OUT1;
	} else
		/*
		 * Most PC uarts need OUT2 raised to enable interrupts.
		 */
		if (is_real_interrupt(up->port.irq))
			up->port.mctrl |= TIOCM_OUT2;

	serial8250_set_mctrl(&up->port, up->port.mctrl);
	spin_unlock_irqrestore(&up->port.lock, flags);

	/*
	 * Finally, enable interrupts.  Note: Modem status interrupts
	 * are set via set_termios(), which will be occurring imminently
	 * anyway, so we don't enable them here.
	 */
	up->ier = UART_IER_RLSI | UART_IER_RDI;
	serial_outp(up, UART_IER, up->ier);

	if (up->port.flags & UPF_FOURPORT) {
		unsigned int icp;
		/*
		 * Enable interrupts on the AST Fourport board
		 */
		icp = (up->port.iobase & 0xfe0) | 0x01f;
		outb_p(0x80, icp);
		(void) inb_p(icp);
	}

	/*
	 * And clear the interrupt registers again for luck.
	 */
	(void) serial_inp(up, UART_LSR);
	(void) serial_inp(up, UART_RX);
	(void) serial_inp(up, UART_IIR);
	(void) serial_inp(up, UART_MSR);

	return 0;
}

int __msm_adsp_write(struct msm_adsp_module *module, unsigned dsp_queue_addr,
		   void *cmd_buf, size_t cmd_size)
{
	uint32_t ctrl_word;
	uint32_t dsp_q_addr;
	uint32_t dsp_addr;
	uint32_t cmd_id = 0;
	int cnt = 0;
	int ret_status = 0;
	unsigned long flags;
	struct adsp_info *info;

	if (!module || !cmd_buf) {
		MM_ERR("Called with NULL parameters\n");
		return -EINVAL;
	}
	info = module->info;
	spin_lock_irqsave(&adsp_write_lock, flags);

	if (module->state != ADSP_STATE_ENABLED) {
		spin_unlock_irqrestore(&adsp_write_lock, flags);
		MM_ERR("module %s not enabled before write\n", module->name);
		return -ENODEV;
	}
	if (adsp_validate_module(module->id)) {
		spin_unlock_irqrestore(&adsp_write_lock, flags);
		MM_ERR("module id validation failed %s  %d\n",
				module->name, module->id);
		return -ENXIO;
	}
	if (dsp_queue_addr >= QDSP_MAX_NUM_QUEUES) {
		spin_unlock_irqrestore(&adsp_write_lock, flags);
		MM_ERR("Invalid Queue Index: %d\n", dsp_queue_addr);
		return -ENXIO;
	}
	if (adsp_validate_queue(module->id, dsp_queue_addr, cmd_size)) {
		spin_unlock_irqrestore(&adsp_write_lock, flags);
		return -EINVAL;
	}
	dsp_q_addr = adsp_get_queue_offset(info, dsp_queue_addr);
	dsp_q_addr &= ADSP_RTOS_WRITE_CTRL_WORD_DSP_ADDR_M;

	/* Poll until the ADSP is ready to accept a command.
	 * Wait for 100us, return error if it's not responding.
	 * If this returns an error, we need to disable ALL modules and
	 * then retry.
	 */
	while (((ctrl_word = readl(info->write_ctrl)) &
		ADSP_RTOS_WRITE_CTRL_WORD_READY_M) !=
		ADSP_RTOS_WRITE_CTRL_WORD_READY_V) {
		if (cnt > 50) {
			MM_ERR("timeout waiting for DSP write ready\n");
			ret_status = -EIO;
			goto fail;
		}
		MM_DBG("waiting for DSP write ready\n");
		udelay(2);
		cnt++;
	}

	/* Set the mutex bits */
	ctrl_word &= ~(ADSP_RTOS_WRITE_CTRL_WORD_MUTEX_M);
	ctrl_word |=  ADSP_RTOS_WRITE_CTRL_WORD_MUTEX_NAVAIL_V;

	/* Clear the command bits */
	ctrl_word &= ~(ADSP_RTOS_WRITE_CTRL_WORD_CMD_M);

	/* Set the queue address bits */
	ctrl_word &= ~(ADSP_RTOS_WRITE_CTRL_WORD_DSP_ADDR_M);
	ctrl_word |= dsp_q_addr;

	writel(ctrl_word, info->write_ctrl);

	/* Generate an interrupt to the DSP.  This notifies the DSP that
	 * we are about to send a command on this particular queue.  The
	 * DSP will in response change its state.
	 */
	writel(1, info->send_irq);

	/* Poll until the adsp responds to the interrupt; this does not
	 * generate an interrupt from the adsp.  This should happen within
	 * 5ms.
	 */
	cnt = 0;
	while ((readl(info->write_ctrl) &
		ADSP_RTOS_WRITE_CTRL_WORD_MUTEX_M) ==
		ADSP_RTOS_WRITE_CTRL_WORD_MUTEX_NAVAIL_V) {
		if (cnt > 2500) {
			MM_ERR("timeout waiting for adsp ack\n");
			ret_status = -EIO;
			goto fail;
		}
		udelay(2);
		cnt++;
	}

	/* Read the ctrl word */
	ctrl_word = readl(info->write_ctrl);

	if ((ctrl_word & ADSP_RTOS_WRITE_CTRL_WORD_STATUS_M) !=
//.........这里部分代码省略.........

static int rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags)
{
	struct sk_buff		*skb;
	struct skb_data		*entry;
	int			retval = 0;
	unsigned long		lockflags;
	size_t			size = dev->rx_urb_size;

	if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) {
		netif_dbg(dev, rx_err, dev->net, "no rx skb\n");
		usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
		usb_free_urb (urb);
		return -ENOMEM;
	}
	//skb_reserve (skb, NET_IP_ALIGN);

	entry = (struct skb_data *) skb->cb;
	entry->urb = urb;
	entry->dev = dev;
	entry->length = 0;

	usb_fill_bulk_urb (urb, dev->udev, dev->in,
		skb->data, size, rx_complete, skb);

	spin_lock_irqsave (&dev->rxq.lock, lockflags);

	if (netif_running (dev->net) &&
	    netif_device_present (dev->net) &&
	    !test_bit (EVENT_RX_HALT, &dev->flags) &&
	    !test_bit (EVENT_DEV_ASLEEP, &dev->flags)) {
		switch (retval = usb_submit_urb (urb, GFP_ATOMIC)) {
		case -EPIPE:
			usbnet_defer_kevent (dev, EVENT_RX_HALT);
			break;
		case -ENOMEM:
			usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
			break;
		case -ENODEV:
			netif_dbg(dev, ifdown, dev->net, "device gone\n");
			netif_device_detach (dev->net);
			break;
		case -EHOSTUNREACH:
			retval = -ENOLINK;
			break;
		default:
			netif_dbg(dev, rx_err, dev->net,
				  "rx submit, %d\n", retval);
			tasklet_schedule (&dev->bh);
			break;
		case 0:
			__usbnet_queue_skb(&dev->rxq, skb, rx_start);
		}
	} else {
		netif_dbg(dev, ifdown, dev->net, "rx: stopped\n");
		retval = -ENOLINK;
	}
	spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
	if (retval) {
		dev_kfree_skb_any (skb);
		usb_free_urb (urb);
	}
	return retval;
}

/*
 * slob_alloc: entry point into the slob allocator.
 */
static void *slob_alloc(size_t size, gfp_t gfp, int align, int node)
{
	struct page *sp;
	struct list_head *prev;
	struct list_head *slob_list;
	slob_t *b = NULL;
	unsigned long flags;

	if (size < SLOB_BREAK1)
		slob_list = &free_slob_small;
	else if (size < SLOB_BREAK2)
		slob_list = &free_slob_medium;
	else
		slob_list = &free_slob_large;

	spin_lock_irqsave(&slob_lock, flags);
	/* Iterate through each partially free page, try to find room */
	list_for_each_entry(sp, slob_list, lru) {
#ifdef CONFIG_NUMA
		/*
		 * If there's a node specification, search for a partial
		 * page with a matching node id in the freelist.
		 */
		if (node != NUMA_NO_NODE && page_to_nid(sp) != node)
			continue;
#endif
		/* Enough room on this page? */
		if (sp->units < SLOB_UNITS(size))
			continue;

		/* Attempt to alloc */
		prev = sp->lru.prev;
		b = slob_page_alloc(sp, size, align);
		if (!b)
			continue;

		/* Improve fragment distribution and reduce our average
		 * search time by starting our next search here. (see
		 * Knuth vol 1, sec 2.5, pg 449) */
		if (prev != slob_list->prev &&
				slob_list->next != prev->next)
			list_move_tail(slob_list, prev->next);
		break;
	}
	spin_unlock_irqrestore(&slob_lock, flags);

	/* Not enough space: must allocate a new page */
	if (!b) {
		b = slob_new_pages(gfp & ~__GFP_ZERO, 0, node);
		if (!b)
			return NULL;
		sp = virt_to_page(b);
		__SetPageSlab(sp);

		spin_lock_irqsave(&slob_lock, flags);
		sp->units = SLOB_UNITS(PAGE_SIZE);
		sp->freelist = b;
		INIT_LIST_HEAD(&sp->lru);
		set_slob(b, SLOB_UNITS(PAGE_SIZE), b + SLOB_UNITS(PAGE_SIZE));
		set_slob_page_free(sp, slob_list);
		b = slob_page_alloc(sp, size, align);
		BUG_ON(!b);
		spin_unlock_irqrestore(&slob_lock, flags);
	}
	if (unlikely((gfp & __GFP_ZERO) && b))
		memset(b, 0, size);
	return b;
}

static void h2p2_dbg_leds_event(led_event_t evt)
{
	unsigned long flags;

	spin_lock_irqsave(&lock, flags);

	if (!(led_state & LED_STATE_ENABLED) && evt != led_start)
		goto done;

	switch (evt) {
	case led_start:
		if (fpga)
			led_state |= LED_STATE_ENABLED;
		break;

	case led_stop:
	case led_halted:
		

		if (!(machine_is_omap_perseus2() || machine_is_omap_h4())) {
			gpio_set_value(GPIO_TIMER, 0);
			gpio_set_value(GPIO_IDLE, 0);
		}

		__raw_writew(~0, &fpga->leds);
		led_state &= ~LED_STATE_ENABLED;
		goto done;

	case led_claim:
		led_state |= LED_STATE_CLAIMED;
		hw_led_state = 0;
		break;

	case led_release:
		led_state &= ~LED_STATE_CLAIMED;
		break;

#ifdef CONFIG_LEDS_TIMER
	case led_timer:
		led_state ^= LED_TIMER_ON;

		if (machine_is_omap_perseus2() || machine_is_omap_h4())
			hw_led_state ^= H2P2_DBG_FPGA_P2_LED_TIMER;
		else {
			gpio_set_value(GPIO_TIMER,
					led_state & LED_TIMER_ON);
			goto done;
		}

		break;
#endif

#ifdef CONFIG_LEDS_CPU
	
	case led_idle_start:
		if (machine_is_omap_perseus2() || machine_is_omap_h4())
			hw_led_state &= ~H2P2_DBG_FPGA_P2_LED_IDLE;
		else {
			gpio_set_value(GPIO_IDLE, 1);
			goto done;
		}

		break;

	case led_idle_end:
		if (machine_is_omap_perseus2() || machine_is_omap_h4())
			hw_led_state |= H2P2_DBG_FPGA_P2_LED_IDLE;
		else {
			gpio_set_value(GPIO_IDLE, 0);
			goto done;
		}

		break;
#endif

	case led_green_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_GREEN;
		break;
	case led_green_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_GREEN;
		break;

	case led_amber_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_AMBER;
		break;
	case led_amber_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_AMBER;
		break;

	case led_red_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_RED;
		break;
	case led_red_off:
		hw_led_state &= ~H2P2_DBG_FPGA_LED_RED;
		break;

	case led_blue_on:
		hw_led_state |= H2P2_DBG_FPGA_LED_BLUE;
		break;
	case led_blue_off:
//.........这里部分代码省略.........