Changeset 91db50ac in mainline for uspace/drv/usbkbd/main.c

Timestamp:

2010-11-19T21:50:46Z (13 years ago)

Author:

Vojtech Horky <vojtechhorky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7034be15

Parents:

63b4f90

Message:

USB driver to HC communication uses DDF interfaces

Started work on using interfaces on the background of communication
between HC and USB driver. However, for driver developers, this will
be hidden completely.

File:

• uspace/drv/usbkbd/main.c (modified) (2 diffs)

uspace/drv/usbkbd/main.c

@@ -30 +30 @@
 #include <errno.h>
 
+#define BUFFER_SIZE 32
+
+/* Call this periodically to check keyboard status changes. */
+static void poll_keyboard(device_t *dev)
+{
+        int rc;
+        usb_handle_t handle;
+        char buffer[BUFFER_SIZE];
+        size_t actual_size;
+        usb_endpoint_t poll_endpoint = 1;
+
+        rc = usb_drv_async_interrupt_in(dev->parent_phone, poll_endpoint,
+            buffer, BUFFER_SIZE, &actual_size, &handle);
+        if (rc != EOK) {
+                return;
+        }
+
+        rc = usb_drv_async_wait_for(handle);
+        if (rc != EOK) {
+                return;
+        }
+
+        /*
+         * If the keyboard answered with NAK, it returned no data.
+         * This implies that no change happened since last query.
+         */
+        if (actual_size == 0) {
+                return;
+        }
+
+        /*
+         * Process pressed keys.
+         */
+}
+
 static int add_kbd_device(device_t *dev)
 {
@@ -38 +73 @@
          * When everything is okay, connect to "our" HC.
          */
-        int rc = usb_drv_hc_connect(dev, 0);
-        if (rc != EOK) {
+        int phone = usb_drv_hc_connect(dev, 0);
+        if (phone < 0) {
                 /*
                  * Connecting to HC failed, roll-back and announce
                  * failure.
                  */
-                return rc;
+                return phone;
         }
+
+        dev->parent_phone = phone;
+
+        /*
+         * Just for fun ;-).
+         */
+        poll_keyboard(dev);
 
         /*