/* * This file is part of the libpayload project. * * Copyright (C) 2008-2010 coresystems GmbH * * 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 "uhci.h" #include "uhci_private.h" typedef struct { int port[2]; } rh_inst_t; #define RH_INST(dev) ((rh_inst_t*)(dev)->data) static void uhci_rh_enable_port (usbdev_t *dev, int port) { u16 value; hci_t *controller = dev->controller; if (port == 1) port = PORTSC1; else if (port == 2) port = PORTSC2; else { usb_debug("Invalid port %d\n", port); return; } uhci_reg_write16(controller, port, uhci_reg_read16(controller, port) & ~(1 << 12)); /* wakeup */ uhci_reg_write16(controller, port, uhci_reg_read16(controller, port) | 1 << 9); /* reset */ mdelay (30); // >10ms uhci_reg_write16(controller, port, uhci_reg_read16(controller, port) & ~(1 << 9)); mdelay (1); // >5.3us per spec, <3ms because some devices make trouble uhci_reg_write16(controller, port, uhci_reg_read16(controller, port) | 1 << 2); /* enable */ /* wait for controller to enable port */ /* TOTEST: how long to wait? 100ms for now */ int timeout = 200; /* time out after 200 * 500us == 100ms */ do { value = uhci_reg_read16 (controller, port); udelay(500); timeout--; } while (((value & (1 << 2)) == 0) && (value & 0x01) && timeout); if (!timeout) usb_debug("Warning: uhci_rh: port enabling timed out.\n"); } /* disable root hub */ static void uhci_rh_disable_port (usbdev_t *dev, int port) { hci_t *controller = dev->controller; if (port == 1) port = PORTSC1; else if (port == 2) port = PORTSC2; else { usb_debug("Invalid port %d\n", port); return; } uhci_reg_write16(controller, port, uhci_reg_read16(controller, port) & ~4); u16 value; /* wait for controller to disable port */ /* TOTEST: how long to wait? 100ms for now */ int timeout = 200; /* time out after 200 * 500us == 100ms */ do { value = uhci_reg_read16 (controller, port); udelay(500); timeout--; } while (((value & (1 << 2)) != 0) && timeout); if (!timeout) usb_debug("Warning: uhci_rh: port disabling timed out.\n"); } static void uhci_rh_scanport (usbdev_t *dev, int port) { int portsc, offset; if (port == 1) { portsc = PORTSC1; offset = 0; } else if (port == 2) { portsc = PORTSC2; offset = 1; } else { usb_debug("Invalid port %d\n", port); return; } int devno = RH_INST (dev)->port[offset]; if ((devno != -1) && (dev->controller->devices[devno] != 0)) { usb_detach_device(dev->controller, devno); RH_INST (dev)->port[offset] = -1; } uhci_reg_write16(dev->controller, portsc, uhci_reg_read16(dev->controller, portsc) | (1 << 3) | (1 << 2)); // clear port state change, enable port mdelay(100); // wait for signal to stabilize if ((uhci_reg_read16 (dev->controller, portsc) & 1) != 0) { // device attached uhci_rh_disable_port (dev, port); uhci_rh_enable_port (dev, port); usb_speed speed = ((uhci_reg_read16 (dev->controller, portsc) >> 8) & 1); RH_INST (dev)->port[offset] = usb_attach_device(dev->controller, dev->address, portsc, speed); } } static int uhci_rh_report_port_changes (usbdev_t *dev) { u16 stored, real; stored = (RH_INST (dev)->port[0] == -1); real = ((uhci_reg_read16 (dev->controller, PORTSC1) & 1) == 0); if (stored != real) { usb_debug("change on port 1\n"); return 1; } stored = (RH_INST (dev)->port[1] == -1); real = ((uhci_reg_read16 (dev->controller, PORTSC2) & 1) == 0); if (stored != real) { usb_debug("change on port 2\n"); return 2; } // maybe detach+attach happened between two scans? if ((uhci_reg_read16 (dev->controller, PORTSC1) & 2) > 0) { usb_debug("possibly re-attached on port 1\n"); return 1; } if ((uhci_reg_read16 (dev->controller, PORTSC2) & 2) > 0) { usb_debug("possibly re-attached on port 2\n"); return 2; } // no change return -1; } static void uhci_rh_destroy (usbdev_t *dev) { usb_detach_device (dev->controller, 1); usb_detach_device (dev->controller, 2); uhci_rh_disable_port (dev, 1); uhci_rh_disable_port (dev, 2); free (RH_INST (dev)); } static void uhci_rh_poll (usbdev_t *dev) { int port; while ((port = uhci_rh_report_port_changes (dev)) != -1) uhci_rh_scanport (dev, port); } void uhci_rh_init (usbdev_t *dev) { dev->destroy = uhci_rh_destroy; dev->poll = uhci_rh_poll; uhci_rh_enable_port (dev, 1); uhci_rh_enable_port (dev, 2); dev->data = xmalloc (sizeof (rh_inst_t)); RH_INST (dev)->port[0] = -1; RH_INST (dev)->port[1] = -1; /* we can set them here because a root hub _really_ shouldn't appear elsewhere */ dev->address = 0; dev->hub = -1; dev->port = -1; }