ChangeSet 1.1595.7.30, 2003/07/31 22:49:50-07:00, [EMAIL PROTECTED]
[PATCH] USB: Add functions to enable/disable endpoints, interfaces
This is the second part of what used to be as66c. It fixes the
initialization of the debugging macros in core/message.c and adds routines
to enable/disable endpoints, interfaces, and entire devices. The code
that _uses_ these routines will come in the next patch.
# Initialize the debugging macros properly in message.c.
#
# Add usb_disable_endpoint(), usb_disable_interface(), usb_disable_device(),
# usb_enable_endpoint(), and usb_enable_interface().
drivers/usb/core/message.c | 127 +++++++++++++++++++++++++++++++++++++++++++++
drivers/usb/core/usb.h | 10 +++
2 files changed, 137 insertions(+)
diff -Nru a/drivers/usb/core/message.c b/drivers/usb/core/message.c
--- a/drivers/usb/core/message.c Fri Aug 1 10:54:03 2003
+++ b/drivers/usb/core/message.c Fri Aug 1 10:54:03 2003
@@ -2,6 +2,14 @@
* message.c - synchronous message handling
*/
+#include <linux/config.h>
+
+#ifdef CONFIG_USB_DEBUG
+ #define DEBUG
+#else
+ #undef DEBUG
+#endif
+
#include <linux/pci.h> /* for scatterlist macros */
#include <linux/usb.h>
#include <linux/module.h>
@@ -11,6 +19,7 @@
#include <asm/byteorder.h>
#include "hcd.h" /* for usbcore internals */
+#include "usb.h"
struct usb_api_data {
wait_queue_head_t wqh;
@@ -757,6 +766,124 @@
usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
return 0;
+}
+
+/**
+ * usb_disable_endpoint -- Disable an endpoint by address
+ * @dev: the device whose endpoint is being disabled
+ * @epaddr: the endpoint's address. Endpoint number for output,
+ * endpoint number + USB_DIR_IN for input
+ *
+ * Deallocates hcd/hardware state for this endpoint ... and nukes all
+ * pending urbs.
+ *
+ * If the HCD hasn't registered a disable() function, this marks the
+ * endpoint as halted and sets its maxpacket size to 0 to prevent
+ * further submissions.
+ */
+void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr)
+{
+ if (dev && dev->bus && dev->bus->op && dev->bus->op->disable)
+ dev->bus->op->disable(dev, epaddr);
+ else {
+ unsigned int epnum = epaddr & USB_ENDPOINT_NUMBER_MASK;
+
+ if (usb_endpoint_out(epaddr)) {
+ usb_endpoint_halt(dev, epnum, 1);
+ dev->epmaxpacketout[epnum] = 0;
+ } else {
+ usb_endpoint_halt(dev, epnum, 0);
+ dev->epmaxpacketin[epnum] = 0;
+ }
+ }
+}
+
+/**
+ * usb_disable_interface -- Disable all endpoints for an interface
+ * @dev: the device whose interface is being disabled
+ * @intf: pointer to the interface descriptor
+ *
+ * Disables all the endpoints for the interface's current altsetting.
+ */
+void usb_disable_interface(struct usb_device *dev, struct usb_interface *intf)
+{
+ struct usb_host_interface *hintf =
+ &intf->altsetting[intf->act_altsetting];
+ int i;
+
+ for (i = 0; i < hintf->desc.bNumEndpoints; ++i) {
+ usb_disable_endpoint(dev,
+ hintf->endpoint[i].desc.bEndpointAddress);
+ }
+}
+
+/*
+ * usb_disable_device - Disable all the endpoints for a USB device
+ * @dev: the device whose endpoints are being disabled
+ * @skip_ep0: 0 to disable endpoint 0, 1 to skip it.
+ *
+ * Disables all the device's endpoints, potentially including endpoint 0.
+ * Deallocates hcd/hardware state for the endpoints ... and nukes all
+ * pending urbs.
+ */
+void usb_disable_device(struct usb_device *dev, int skip_ep0)
+{
+ int i;
+
+ dbg("nuking URBs for device %s", dev->dev.bus_id);
+ for (i = skip_ep0; i < 16; ++i) {
+ usb_disable_endpoint(dev, i);
+ usb_disable_endpoint(dev, i + USB_DIR_IN);
+ }
+}
+
+
+/*
+ * usb_enable_endpoint - Enable an endpoint for USB communications
+ * @dev: the device whose interface is being enabled
+ * @epd: pointer to the endpoint descriptor
+ *
+ * Marks the endpoint as running, resets its toggle, and stores
+ * its maxpacket value. For control endpoints, both the input
+ * and output sides are handled.
+ */
+void usb_enable_endpoint(struct usb_device *dev,
+ struct usb_endpoint_descriptor *epd)
+{
+ int maxsize = epd->wMaxPacketSize;
+ unsigned int epaddr = epd->bEndpointAddress;
+ unsigned int epnum = epaddr & USB_ENDPOINT_NUMBER_MASK;
+ int is_control = ((epd->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+ USB_ENDPOINT_XFER_CONTROL);
+
+ if (usb_endpoint_out(epaddr) || is_control) {
+ usb_endpoint_running(dev, epnum, 1);
+ usb_settoggle(dev, epnum, 1, 0);
+ dev->epmaxpacketout[epnum] = maxsize;
+ }
+ if (!usb_endpoint_out(epaddr) || is_control) {
+ usb_endpoint_running(dev, epnum, 0);
+ usb_settoggle(dev, epnum, 0, 0);
+ dev->epmaxpacketin[epnum] = maxsize;
+ }
+}
+
+/*
+ * usb_enable_interface - Enable all the endpoints for an interface
+ * @dev: the device whose interface is being enabled
+ * @intf: pointer to the interface descriptor
+ *
+ * Enables all the endpoints for the interface's current altsetting.
+ */
+void usb_enable_interface(struct usb_device *dev,
+ struct usb_interface *intf)
+{
+ struct usb_host_interface *hintf =
+ &intf->altsetting[intf->act_altsetting];
+ int i;
+
+ for (i = 0; i < hintf->desc.bNumEndpoints; ++i)
+ usb_enable_endpoint(dev, &hintf->endpoint[i].desc);
}
/**
diff -Nru a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
--- a/drivers/usb/core/usb.h Fri Aug 1 10:54:03 2003
+++ b/drivers/usb/core/usb.h Fri Aug 1 10:54:03 2003
@@ -4,3 +4,13 @@
extern void usb_create_driverfs_intf_files (struct usb_interface *intf);
extern int usb_probe_interface (struct device *dev);
extern int usb_unbind_interface (struct device *dev);
+
+extern void usb_disable_endpoint (struct usb_device *dev, unsigned int epaddr);
+extern void usb_disable_interface (struct usb_device *dev,
+ struct usb_interface *intf);
+extern void usb_disable_device (struct usb_device *dev, int skip_ep0);
+
+extern void usb_enable_endpoint (struct usb_device *dev,
+ struct usb_endpoint_descriptor *epd);
+extern void usb_enable_interface (struct usb_device *dev,
+ struct usb_interface *intf);
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