Changeset 11349a85 in mainline

Timestamp:

2011-05-08T19:02:07Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

511cfc8

Parents:

8855939

Message:

Use non-printed debug statement to wait the right amount of time (nasty-way)

Fixes bug #98
UHCI rh tries multiple(4) times to initialize a device.

File:

• uspace/drv/uhci-rhd/port.c (modified) (3 diffs)

uspace/drv/uhci-rhd/port.c

@@ -212 +212 @@
 
         /*
-         * Resets from root ports should be nominally 50ms
+         * Resets from root ports should be nominally 50ms (USB spec 7.1.7.3)
          */
         {
@@ -223 +223 @@
                 port_status &= ~STATUS_IN_RESET;
                 uhci_port_write_status(port, port_status);
-                usb_log_debug("%s: Reset Signal stop.\n", port->id_string);
-        }
-
+                while (uhci_port_read_status(port) & STATUS_IN_RESET);
+                // TODO: find a better way to waste time (it should be less than
+                // 10ms, if we reschedule it takes too much time (random
+                // interrupts can be solved by multiple attempts).
+                usb_log_debug2("%s: Reset Signal stop.\n", port->id_string);
+        }
         /* Enable the port. */
         uhci_port_set_enabled(port, true);
+
+        /* Reset recovery period,
+         * devices do not have to respond during this period
+         */
+        async_usleep(10000);
         return EOK;
 }
@@ -246 +254 @@
         usb_log_debug("%s: Detected new device.\n", port->id_string);
 
+        int ret, count = 0;
         usb_address_t dev_addr;
-        int ret = usb_hc_new_device_wrapper(port->rh, &port->hc_connection,
-            speed, uhci_port_reset_enable, port->number, port,
-            &dev_addr, &port->attached_device, NULL, NULL, NULL);
+        do {
+                ret = usb_hc_new_device_wrapper(port->rh, &port->hc_connection,
+                    speed, uhci_port_reset_enable, port->number, port,
+                    &dev_addr, &port->attached_device, NULL, NULL, NULL);
+        } while (ret != EOK && ++count < 4);
 
         if (ret != EOK) {