Changeset 9dfb034 in mainline for uspace/drv/bus/usb/ohci/hc.c

Timestamp:

2025-03-04T17:35:28Z (34 hours ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

master

Children:

89b5a75, 94ea2e3

Parents:

77a0119

Message:

Implement quiesce for EHCI and OHCI.

File:

• uspace/drv/bus/usb/ohci/hc.c (modified) (2 diffs)

uspace/drv/bus/usb/ohci/hc.c

@@ -1 +1 @@
 /*
+ * Copyright (c) 2025 Jiri Svoboda
  * Copyright (c) 2011 Jan Vesely
  * Copyright (c) 2018 Ondrej Hlavaty
@@ -196 +197 @@
 }
 
+/** Quiesce host controller
+ *
+ * @param hcd Host controller device
+ */
+int hc_quiesce(hc_device_t *hcd)
+{
+        hc_t *instance = hcd_to_hc(hcd);
+
+        /* OHCI guide page 42 */
+        usb_log_debug2("Started hc initialization routine.");
+
+        /* Reset hc */
+        usb_log_debug2("HC reset.");
+        size_t time = 0;
+        OHCI_WR(instance->registers->command_status, CS_HCR);
+        while (OHCI_RD(instance->registers->command_status) & CS_HCR) {
+                fibril_usleep(10);
+                time += 10;
+        }
+        usb_log_debug2("HC reset complete in %zu us.", time);
+
+        return EOK;
+}
+
 void hc_enqueue_endpoint(hc_t *instance, const endpoint_t *ep)
 {