예제 #1
0
/*------------------------------------------------------------------------------
 * This is called when the USB service is stopped or paused for a PD.
 * Context: softirq or process
 */
void oz_usb_stop(struct oz_pd *pd, int pause)
{
	struct oz_usb_ctx *usb_ctx;
	oz_event_log(OZ_EVT_SERVICE, 4, OZ_APPID_USB, 0, pause);
	if (pause) {
		oz_trace("USB service paused.\n");
		return;
	}
	spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
	usb_ctx = (struct oz_usb_ctx *)pd->app_ctx[OZ_APPID_USB-1];
	pd->app_ctx[OZ_APPID_USB-1] = 0;
	spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
	if (usb_ctx) {
		unsigned long tout = jiffies + HZ;
		oz_trace("USB service stopping...\n");
		usb_ctx->stopped = 1;
		/* At this point the reference count on the usb context should
		 * be 2 - one from when we created it and one from the hcd
		 * which claims a reference. Since stopped = 1 no one else
		 * should get in but someone may already be in. So wait
		 * until they leave but timeout after 1 second.
		 */
		while ((atomic_read(&usb_ctx->ref_count) > 2) &&
			time_before(jiffies, tout))
			;
		oz_trace("USB service stopped.\n");
		oz_hcd_pd_departed(usb_ctx->hport);
		/* Release the reference taken in oz_usb_start.
		 */
		oz_usb_put(usb_ctx);
	}
}
예제 #2
0
/*------------------------------------------------------------------------------
 * This is called when the USB service is started or resumed for a PD.
 * Context: softirq
 */
int oz_usb_start(struct oz_pd *pd, int resume)
{
	int rc = 0;
	struct oz_usb_ctx *usb_ctx;
	struct oz_usb_ctx *old_ctx = 0;
	oz_event_log(OZ_EVT_SERVICE, 3, OZ_APPID_USB, 0, resume);
	if (resume) {
		oz_trace("USB service resumed.\n");
		return 0;
	}
	oz_trace("USB service started.\n");
	/* Create a USB context in case we need one. If we find the PD already
	 * has a USB context then we will destroy it.
	 */
	usb_ctx = kzalloc(sizeof(struct oz_usb_ctx), GFP_ATOMIC);
	if (usb_ctx == 0)
		return -ENOMEM;
	atomic_set(&usb_ctx->ref_count, 1);
	usb_ctx->pd = pd;
	usb_ctx->stopped = 0;
	/* Install the USB context if the PD doesn't already have one.
	 * If it does already have one then destroy the one we have just
	 * created.
	 */
	spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
	old_ctx = pd->app_ctx[OZ_APPID_USB-1];
	if (old_ctx == 0)
		pd->app_ctx[OZ_APPID_USB-1] = usb_ctx;
	oz_usb_get(pd->app_ctx[OZ_APPID_USB-1]);
	spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
	if (old_ctx) {
		oz_trace("Already have USB context.\n");
		kfree(usb_ctx);
		usb_ctx = old_ctx;
	} else if (usb_ctx) {
		/* Take a reference to the PD. This will be released when
		 * the USB context is destroyed.
		 */
		oz_pd_get(pd);
	}
	/* If we already had a USB context and had obtained a port from
	 * the USB HCD then just reset the port. If we didn't have a port
	 * then report the arrival to the USB HCD so we get one.
	 */
	if (usb_ctx->hport) {
		oz_hcd_pd_reset(usb_ctx, usb_ctx->hport);
	} else {
		usb_ctx->hport = oz_hcd_pd_arrived(usb_ctx);
		if (usb_ctx->hport == 0) {
			oz_trace("USB hub returned null port.\n");
			spin_lock_bh(&pd->app_lock[OZ_APPID_USB-1]);
			pd->app_ctx[OZ_APPID_USB-1] = 0;
			spin_unlock_bh(&pd->app_lock[OZ_APPID_USB-1]);
			oz_usb_put(usb_ctx);
			rc = -1;
		}
	}
	oz_usb_put(usb_ctx);
	return rc;
}
예제 #3
0
/*------------------------------------------------------------------------------
 * Context: softirq or process
 */
void oz_cdev_stop(struct oz_pd *pd, int pause)
{
	struct oz_serial_ctx *ctx;
	oz_event_log(OZ_EVT_SERVICE, 4, OZ_APPID_SERIAL, 0, pause);
	if (pause) {
		oz_trace("Serial service paused.\n");
		return;
	}
	spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
	ctx = (struct oz_serial_ctx *)pd->app_ctx[OZ_APPID_SERIAL-1];
	pd->app_ctx[OZ_APPID_SERIAL-1] = 0;
	spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
	if (ctx)
		oz_cdev_release_ctx(ctx);
	spin_lock(&g_cdev.lock);
	if (pd == g_cdev.active_pd)
		g_cdev.active_pd = 0;
	else
		pd = 0;
	spin_unlock(&g_cdev.lock);
	if (pd) {
		oz_pd_put(pd);
		oz_trace("Active PD departed.\n");
	}
	oz_trace("Serial service stopped.\n");
}
예제 #4
0
/*------------------------------------------------------------------------------
 * Context: softirq-serialized
 */
int oz_cdev_start(struct oz_pd *pd, int resume)
{
	struct oz_serial_ctx *ctx;
	struct oz_serial_ctx *old_ctx = 0;
	oz_event_log(OZ_EVT_SERVICE, 3, OZ_APPID_SERIAL, 0, resume);
	if (resume) {
		oz_trace("Serial service resumed.\n");
		return 0;
	}
	ctx = kzalloc(sizeof(struct oz_serial_ctx), GFP_ATOMIC);
	if (ctx == 0)
		return -ENOMEM;
	atomic_set(&ctx->ref_count, 1);
	ctx->tx_seq_num = 1;
	spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
	old_ctx = pd->app_ctx[OZ_APPID_SERIAL-1];
	if (old_ctx) {
		spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
		kfree(ctx);
	} else {
		pd->app_ctx[OZ_APPID_SERIAL-1] = ctx;
		spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
	}
	spin_lock(&g_cdev.lock);
	if ((g_cdev.active_pd == 0) &&
		(memcmp(pd->mac_addr, g_cdev.active_addr, ETH_ALEN) == 0)) {
		oz_pd_get(pd);
		g_cdev.active_pd = pd;
		oz_trace("Active PD arrived.\n");
	}
	spin_unlock(&g_cdev.lock);
	oz_trace("Serial service started.\n");
	return 0;
}
예제 #5
0
/*------------------------------------------------------------------------------
 * Context: tasklet
 */
int oz_usb_control_req(void *hpd, u8 req_id, struct usb_ctrlrequest *setup,
			u8 *data, int data_len)
{
	unsigned wvalue = le16_to_cpu(setup->wValue);
	unsigned windex = le16_to_cpu(setup->wIndex);
	unsigned wlength = le16_to_cpu(setup->wLength);
	int rc = 0;
	oz_event_log(OZ_EVT_CTRL_REQ, setup->bRequest, req_id,
		(void *)(((unsigned long)(setup->wValue))<<16 |
			((unsigned long)setup->wIndex)),
		setup->bRequestType);
	if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
		switch (setup->bRequest) {
		case USB_REQ_GET_DESCRIPTOR:
			rc = oz_usb_get_desc_req(hpd, req_id,
				setup->bRequestType, (u8)(wvalue>>8),
				(u8)wvalue, setup->wIndex, 0, wlength);
			break;
		case USB_REQ_SET_CONFIGURATION:
			rc = oz_usb_set_config_req(hpd, req_id, (u8)wvalue);
			break;
		case USB_REQ_SET_INTERFACE: {
				u8 if_num = (u8)windex;
				u8 alt = (u8)wvalue;
				rc = oz_usb_set_interface_req(hpd, req_id,
					if_num, alt);
			}
			break;
		case USB_REQ_SET_FEATURE:
			rc = oz_usb_set_clear_feature_req(hpd, req_id,
				OZ_SET_FEATURE_REQ,
				setup->bRequestType & 0xf, (u8)windex,
				setup->wValue);
			break;
		case USB_REQ_CLEAR_FEATURE:
			rc = oz_usb_set_clear_feature_req(hpd, req_id,
				OZ_CLEAR_FEATURE_REQ,
				setup->bRequestType & 0xf,
				(u8)windex, setup->wValue);
			break;
		}
	} else {
예제 #6
0
/*------------------------------------------------------------------------------
 * Context: softirq or process
 */
void oz_pd_set_state(struct oz_pd *pd, unsigned state)
{
	pd->state = state;
	oz_event_log(OZ_EVT_PD_STATE, 0, 0, 0, state);
#ifdef WANT_TRACE
	switch (state) {
	case OZ_PD_S_IDLE:
		oz_trace("PD State: OZ_PD_S_IDLE\n");
		break;
	case OZ_PD_S_CONNECTED:
		oz_trace("PD State: OZ_PD_S_CONNECTED\n");
		break;
	case OZ_PD_S_STOPPED:
		oz_trace("PD State: OZ_PD_S_STOPPED\n");
		break;
	case OZ_PD_S_SLEEP:
		oz_trace("PD State: OZ_PD_S_SLEEP\n");
		break;
	}
#endif /* WANT_TRACE */
}
예제 #7
0
/*------------------------------------------------------------------------------
 * This is called once when the driver is unloaded to terminate the USB service.
 * Context: process
 */
void oz_usb_term(void)
{
	oz_event_log(OZ_EVT_SERVICE, 2, OZ_APPID_USB, 0, 0);
	oz_hcd_term();
}
예제 #8
0
/*------------------------------------------------------------------------------
 * This is called once when the driver is loaded to initialise the USB service.
 * Context: process
 */
int oz_usb_init(void)
{
	oz_event_log(OZ_EVT_SERVICE, 1, OZ_APPID_USB, 0, 0);
	return oz_hcd_init();
}
예제 #9
0
/*------------------------------------------------------------------------------
 * Context: process
 */
void oz_cdev_term(void)
{
	oz_event_log(OZ_EVT_SERVICE, 2, OZ_APPID_SERIAL, 0, 0);
	oz_app_enable(OZ_APPID_SERIAL, 0);
}
예제 #10
0
/*------------------------------------------------------------------------------
 * Context: process
 */
int oz_cdev_init(void)
{
	oz_event_log(OZ_EVT_SERVICE, 1, OZ_APPID_SERIAL, 0, 0);
	oz_app_enable(OZ_APPID_SERIAL, 1);
	return 0;
}