Add support for OHCI controllers and prelimiary support for xHCI (USB3) controllers.
Improve scanning for USB controllers.
Limitations:
- OHCI doesn't support interrupt transfers yet (ie. no keyboards)
- xHCI just does initialization and device attach/detach so far
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5691 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/payloads/libpayload/drivers/usb/ohci_rh.c b/payloads/libpayload/drivers/usb/ohci_rh.c
new file mode 100644
index 0000000..da74340
--- /dev/null
+++ b/payloads/libpayload/drivers/usb/ohci_rh.c
@@ -0,0 +1,164 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2010 Patrick Georgi
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+//#define USB_DEBUG
+
+#include <libpayload.h>
+#include "ohci_private.h"
+#include "ohci.h"
+
+typedef struct {
+ int numports;
+ int *port;
+} rh_inst_t;
+
+#define RH_INST(dev) ((rh_inst_t*)(dev)->data)
+
+static void
+ohci_rh_enable_port (usbdev_t *dev, int port)
+{
+ if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & CurrentConnectStatus))
+ return;
+
+ OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = SetPortEnable; // enable port
+ mdelay(10);
+ while (!(OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus)) mdelay(1);
+ OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = SetPortReset; // reset port
+ while (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortResetStatus) mdelay(1);
+ OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = PortResetStatusChange;
+}
+
+/* disable root hub */
+static void
+ohci_rh_disable_port (usbdev_t *dev, int port)
+{
+ OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = ClearPortEnable; // disable port
+ while (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus) mdelay(1);
+}
+
+static void
+ohci_rh_scanport (usbdev_t *dev, int port)
+{
+ if (port >= RH_INST(dev)->numports) {
+ debug("Invalid port %d\n", port);
+ return;
+ }
+
+ /* device registered, and device change logged, so something must have happened */
+ if (RH_INST (dev)->port[port] != -1) {
+ usb_detach_device(dev->controller, RH_INST (dev)->port[port]);
+ RH_INST (dev)->port[port] = -1;
+ }
+
+ /* no device attached
+ previously registered devices are detached, nothing left to do */
+ if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & CurrentConnectStatus))
+ return;
+
+ OHCI_INST (dev->controller)->opreg->HcRhPortStatus[port] = ConnectStatusChange; // clear port state change
+ ohci_rh_enable_port (dev, port);
+
+ mdelay(100); // wait for signal to stabilize
+
+ if (!(OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & PortEnableStatus)) {
+ debug ("port enable failed\n");
+ return;
+ }
+
+ int speed = (OHCI_INST(dev->controller)->opreg->HcRhPortStatus[port] & LowSpeedDeviceAttached) != 0;
+ RH_INST (dev)->port[port] = usb_attach_device(dev->controller, dev->address, port, speed);
+}
+
+static int
+ohci_rh_report_port_changes (usbdev_t *dev)
+{
+ int i;
+
+ if (!(OHCI_INST (dev->controller)->opreg->HcInterruptStatus & RootHubStatusChange)) return -1;
+ OHCI_INST (dev->controller)->opreg->HcInterruptStatus = RootHubStatusChange;
+ debug("port change\n");
+
+ for (i = 0; i < RH_INST(dev)->numports; i++) {
+ // maybe detach+attach happened between two scans?
+ if (OHCI_INST (dev->controller)->opreg->HcRhPortStatus[i] & ConnectStatusChange) {
+ debug("attachment change on port %d\n", i);
+ return i;
+ }
+ }
+
+ // no change
+ return -1;
+}
+
+static void
+ohci_rh_destroy (usbdev_t *dev)
+{
+ int i;
+ for (i = 0; i < RH_INST (dev)->numports; i++)
+ ohci_rh_disable_port (dev, i);
+ free (RH_INST (dev));
+}
+
+static void
+ohci_rh_poll (usbdev_t *dev)
+{
+ int port;
+ while ((port = ohci_rh_report_port_changes (dev)) != -1)
+ ohci_rh_scanport (dev, port);
+}
+
+void
+ohci_rh_init (usbdev_t *dev)
+{
+ int i;
+
+ dev->destroy = ohci_rh_destroy;
+ dev->poll = ohci_rh_poll;
+
+ dev->data = malloc (sizeof (rh_inst_t));
+ if (!dev->data)
+ usb_fatal ("Not enough memory for OHCI RH.\n");
+
+ RH_INST (dev)->numports = OHCI_INST (dev->controller)->opreg->HcRhDescriptorA & NumberDownstreamPortsMask;
+ RH_INST (dev)->port = malloc(sizeof(int) * RH_INST (dev)->numports);
+ debug("%d ports registered\n", RH_INST (dev)->numports);
+
+ for (i = 0; i < RH_INST (dev)->numports; i++) {
+ ohci_rh_enable_port (dev, i);
+ RH_INST (dev)->port[i] = -1;
+ }
+
+ /* we can set them here because a root hub _really_ shouldn't
+ appear elsewhere */
+ dev->address = 0;
+ dev->hub = -1;
+ dev->port = -1;
+
+ debug("rh init done\n");
+}