| /* |
| * 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" |
| |
| 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 { |
| printf("Invalid port %d\n", port); |
| return; |
| } |
| |
| uhci_reg_mask16 (controller, port, ~(1 << 12), 0); /* wakeup */ |
| |
| uhci_reg_mask16 (controller, port, ~0, 1 << 9); /* reset */ |
| mdelay (30); // >10ms |
| uhci_reg_mask16 (controller, port, ~(1 << 9), 0); |
| mdelay (1); // >5.3us per spec, <3ms because some devices make trouble |
| |
| uhci_reg_mask16 (controller, port, ~0, 1 << 2); /* enable */ |
| do { |
| value = uhci_reg_read16 (controller, port); |
| mdelay (1); |
| } while (((value & (1 << 2)) == 0) && (value & 0x01)); |
| } |
| |
| /* disable root hub */ |
| static void |
| uhci_rh_disable_port (usbdev_t *dev, int port) |
| { |
| hci_t *controller = dev->controller; |
| port = PORTSC2; |
| if (port == 1) |
| port = PORTSC1; |
| uhci_reg_mask16 (controller, port, ~4, 0); |
| int value; |
| do { |
| value = uhci_reg_read16 (controller, port); |
| mdelay (1); |
| } while ((value & (1 << 2)) != 0); |
| } |
| |
| 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 { |
| printf("Invalid port %d\n", port); |
| return; |
| } |
| int devno = RH_INST (dev)->port[offset]; |
| if ((dev->controller->devices[devno] != 0) && (devno != -1)) { |
| usb_detach_device(dev->controller, devno); |
| RH_INST (dev)->port[offset] = -1; |
| } |
| uhci_reg_mask16 (dev->controller, portsc, ~0, (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); |
| |
| int 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) |
| { |
| int stored, real; |
| |
| stored = (RH_INST (dev)->port[0] == -1); |
| real = ((uhci_reg_read16 (dev->controller, PORTSC1) & 1) == 0); |
| if (stored != real) { |
| 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) { |
| debug("change on port 2\n"); |
| return 2; |
| } |
| |
| // maybe detach+attach happened between two scans? |
| |
| if ((uhci_reg_read16 (dev->controller, PORTSC1) & 2) > 0) { |
| debug("possibly re-attached on port 1\n"); |
| return 1; |
| } |
| if ((uhci_reg_read16 (dev->controller, PORTSC2) & 2) > 0) { |
| debug("possibly re-attached on port 2\n"); |
| return 2; |
| } |
| |
| // no change |
| return -1; |
| } |
| |
| static void |
| uhci_rh_destroy (usbdev_t *dev) |
| { |
| 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 = malloc (sizeof (rh_inst_t)); |
| if (!dev->data) |
| usb_fatal ("Not enough memory for UHCI RH.\n"); |
| |
| 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; |
| } |