diff options
author | Patrick Georgi <patrick@georgi-clan.de> | 2010-08-13 09:18:58 +0000 |
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committer | Patrick Georgi <patrick.georgi@coresystems.de> | 2010-08-13 09:18:58 +0000 |
commit | 6615ef3bfc3ff20643a31f01e40473e174460b46 (patch) | |
tree | 008063a7044a603d606cab68b05e20326b5ba47b /payloads/libpayload/drivers/usb/ohci_rh.c | |
parent | 03e54de648db0c7059ff7732b8b74a44317ef1a9 (diff) | |
download | coreboot-6615ef3bfc3ff20643a31f01e40473e174460b46.tar.xz |
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
Diffstat (limited to 'payloads/libpayload/drivers/usb/ohci_rh.c')
-rw-r--r-- | payloads/libpayload/drivers/usb/ohci_rh.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/usb/ohci_rh.c b/payloads/libpayload/drivers/usb/ohci_rh.c new file mode 100644 index 0000000000..da74340abd --- /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"); +} |