559 lines
16 KiB
C
559 lines
16 KiB
C
/* usb.c - USB Hub Support. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/mm.h>
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#include <grub/usb.h>
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#include <grub/misc.h>
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#include <grub/time.h>
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#define GRUB_USBHUB_MAX_DEVICES 128
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/* USB Supports 127 devices, with device 0 as special case. */
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static struct grub_usb_device *grub_usb_devs[GRUB_USBHUB_MAX_DEVICES];
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static int rescan = 0;
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struct grub_usb_hub
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{
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struct grub_usb_hub *next;
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grub_usb_controller_t controller;
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int nports;
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struct grub_usb_device **devices;
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grub_usb_device_t dev;
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};
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static struct grub_usb_hub *hubs;
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/* Add a device that currently has device number 0 and resides on
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CONTROLLER, the Hub reported that the device speed is SPEED. */
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static grub_usb_device_t
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grub_usb_hub_add_dev (grub_usb_controller_t controller, grub_usb_speed_t speed)
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{
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grub_usb_device_t dev;
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int i;
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grub_usb_err_t err;
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dev = grub_zalloc (sizeof (struct grub_usb_device));
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if (! dev)
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return NULL;
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dev->controller = *controller;
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dev->speed = speed;
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err = grub_usb_device_initialize (dev);
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if (err)
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{
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grub_free (dev);
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return NULL;
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}
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/* Assign a new address to the device. */
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for (i = 1; i < GRUB_USBHUB_MAX_DEVICES; i++)
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{
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if (! grub_usb_devs[i])
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break;
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}
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if (i == GRUB_USBHUB_MAX_DEVICES)
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{
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grub_error (GRUB_ERR_IO, "can't assign address to USB device");
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for (i = 0; i < 8; i++)
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grub_free (dev->config[i].descconf);
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grub_free (dev);
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return NULL;
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}
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err = grub_usb_control_msg (dev,
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(GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_STANDARD
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| GRUB_USB_REQTYPE_TARGET_DEV),
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GRUB_USB_REQ_SET_ADDRESS,
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i, 0, 0, NULL);
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if (err)
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{
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for (i = 0; i < 8; i++)
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grub_free (dev->config[i].descconf);
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grub_free (dev);
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return NULL;
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}
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dev->addr = i;
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dev->initialized = 1;
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grub_usb_devs[i] = dev;
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/* Wait "recovery interval", spec. says 2ms */
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grub_millisleep (2);
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grub_usb_device_attach (dev);
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return dev;
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}
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static grub_usb_err_t
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grub_usb_add_hub (grub_usb_device_t dev)
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{
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struct grub_usb_usb_hubdesc hubdesc;
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grub_usb_err_t err;
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int i;
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err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_DEV),
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GRUB_USB_REQ_GET_DESCRIPTOR,
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(GRUB_USB_DESCRIPTOR_HUB << 8) | 0,
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0, sizeof (hubdesc), (char *) &hubdesc);
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if (err)
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return err;
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grub_dprintf ("usb", "Hub descriptor:\n\t\t len:%d, typ:0x%02x, cnt:%d, char:0x%02x, pwg:%d, curr:%d\n",
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hubdesc.length, hubdesc.type, hubdesc.portcnt,
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hubdesc.characteristics, hubdesc.pwdgood,
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hubdesc.current);
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/* Activate the first configuration. Hubs should have only one conf. */
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grub_dprintf ("usb", "Hub set configuration\n");
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grub_usb_set_configuration (dev, 1);
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dev->children = grub_zalloc (hubdesc.portcnt * sizeof (dev->children[0]));
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if (!dev->children)
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return GRUB_USB_ERR_INTERNAL;
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dev->nports = hubdesc.portcnt;
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/* Power on all Hub ports. */
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for (i = 1; i <= hubdesc.portcnt; i++)
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{
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grub_dprintf ("usb", "Power on - port %d\n", i);
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/* Power on the port and wait for possible device connect */
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_SET_FEATURE,
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GRUB_USB_HUB_FEATURE_PORT_POWER,
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i, 0, NULL);
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}
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/* Rest will be done on next usb poll. */
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for (i = 0; i < dev->config[0].interf[0].descif->endpointcnt;
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i++)
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{
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struct grub_usb_desc_endp *endp = NULL;
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endp = &dev->config[0].interf[0].descendp[i];
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if ((endp->endp_addr & 128) && grub_usb_get_ep_type(endp)
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== GRUB_USB_EP_INTERRUPT)
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{
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dev->hub_endpoint = endp;
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dev->hub_transfer
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= grub_usb_bulk_read_background (dev, endp->endp_addr,
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grub_min (endp->maxpacket,
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sizeof (dev->statuschange)),
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(char *) &dev->statuschange);
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break;
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}
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}
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rescan = 1;
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return GRUB_ERR_NONE;
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}
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static void
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attach_root_port (struct grub_usb_hub *hub, int portno,
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grub_usb_speed_t speed)
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{
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grub_usb_device_t dev;
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grub_err_t err;
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int total, i;
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grub_usb_speed_t current_speed = GRUB_USB_SPEED_NONE;
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int changed=0;
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#if 0
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/* Specification does not say about disabling of port when device
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* connected. If disabling is really necessary for some devices,
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* delete this #if 0 and related #endif */
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/* Disable the port. XXX: Why? */
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err = hub->controller->dev->portstatus (hub->controller, portno, 0);
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if (err)
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return;
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#endif
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/* Wait for completion of insertion and stable power (USB spec.)
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* Should be at least 100ms, some devices requires more...
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* There is also another thing - some devices have worse contacts
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* and connected signal is unstable for some time - we should handle
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* it - but prevent deadlock in case when device is too faulty... */
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for (total = i = 0; (i < 250) && (total < 2000); i++, total++)
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{
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grub_millisleep (1);
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current_speed = hub->controller->dev->detect_dev
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(hub->controller, portno, &changed);
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if (current_speed == GRUB_USB_SPEED_NONE)
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i = 0;
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}
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grub_dprintf ("usb", "total=%d\n", total);
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if (total >= 2000)
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return;
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/* Enable the port. */
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err = hub->controller->dev->portstatus (hub->controller, portno, 1);
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if (err)
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return;
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hub->controller->dev->pending_reset = grub_get_time_ms () + 5000;
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/* Enable the port and create a device. */
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dev = grub_usb_hub_add_dev (hub->controller, speed);
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hub->controller->dev->pending_reset = 0;
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if (! dev)
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return;
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hub->devices[portno] = dev;
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/* If the device is a Hub, scan it for more devices. */
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if (dev->descdev.class == 0x09)
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grub_usb_add_hub (dev);
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}
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grub_usb_err_t
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grub_usb_root_hub (grub_usb_controller_t controller)
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{
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int i;
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struct grub_usb_hub *hub;
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int changed=0;
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hub = grub_malloc (sizeof (*hub));
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if (!hub)
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return GRUB_USB_ERR_INTERNAL;
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hub->next = hubs;
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hubs = hub;
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hub->controller = grub_malloc (sizeof (*controller));
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if (!hub->controller)
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{
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grub_free (hub);
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return GRUB_USB_ERR_INTERNAL;
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}
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grub_memcpy (hub->controller, controller, sizeof (*controller));
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hub->dev = 0;
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/* Query the number of ports the root Hub has. */
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hub->nports = controller->dev->hubports (controller);
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hub->devices = grub_zalloc (sizeof (hub->devices[0]) * hub->nports);
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if (!hub->devices)
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{
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grub_free (hub->controller);
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grub_free (hub);
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return GRUB_USB_ERR_INTERNAL;
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}
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for (i = 0; i < hub->nports; i++)
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{
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grub_usb_speed_t speed;
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if (!controller->dev->pending_reset)
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{
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speed = controller->dev->detect_dev (hub->controller, i,
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&changed);
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if (speed != GRUB_USB_SPEED_NONE)
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attach_root_port (hub, i, speed);
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}
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}
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return GRUB_USB_ERR_NONE;
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}
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static void detach_device (grub_usb_device_t dev);
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static void
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detach_device (grub_usb_device_t dev)
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{
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unsigned i;
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int k;
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if (!dev)
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return;
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if (dev->descdev.class == GRUB_USB_CLASS_HUB)
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{
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if (dev->hub_transfer)
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grub_usb_cancel_transfer (dev->hub_transfer);
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for (i = 0; i < dev->nports; i++)
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detach_device (dev->children[i]);
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grub_free (dev->children);
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}
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for (i = 0; i < ARRAY_SIZE (dev->config); i++)
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if (dev->config[i].descconf)
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for (k = 0; k < dev->config[i].descconf->numif; k++)
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{
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struct grub_usb_interface *inter = &dev->config[i].interf[k];
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if (inter && inter->detach_hook)
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inter->detach_hook (dev, i, k);
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}
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grub_usb_devs[dev->addr] = 0;
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}
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static void
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poll_nonroot_hub (grub_usb_device_t dev)
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{
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grub_usb_err_t err;
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unsigned i;
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grub_uint8_t changed;
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grub_size_t actual;
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int j, total;
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if (!dev->hub_transfer)
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return;
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err = grub_usb_check_transfer (dev->hub_transfer, &actual);
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if (err == GRUB_USB_ERR_WAIT)
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return;
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changed = dev->statuschange;
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dev->hub_transfer
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= grub_usb_bulk_read_background (dev, dev->hub_endpoint->endp_addr,
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grub_min (dev->hub_endpoint->maxpacket,
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sizeof (dev->statuschange)),
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(char *) &dev->statuschange);
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if (err || actual == 0 || changed == 0)
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return;
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/* Iterate over the Hub ports. */
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for (i = 1; i <= dev->nports; i++)
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{
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grub_uint32_t status;
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grub_uint32_t current_status = 0;
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if (!(changed & (1 << i)))
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continue;
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/* Get the port status. */
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err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_GET_STATUS,
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0, i, sizeof (status), (char *) &status);
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grub_printf ("dev = %p, i = %d, status = %08x\n",
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dev, i, status);
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if (err)
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continue;
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/* FIXME: properly handle these conditions. */
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if (status & GRUB_USB_HUB_STATUS_C_PORT_ENABLED)
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_CLEAR_FEATURE,
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GRUB_USB_HUB_FEATURE_C_PORT_ENABLED, i, 0, 0);
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if (status & GRUB_USB_HUB_STATUS_C_PORT_SUSPEND)
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_CLEAR_FEATURE,
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GRUB_USB_HUB_FEATURE_C_PORT_SUSPEND, i, 0, 0);
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if (status & GRUB_USB_HUB_STATUS_C_PORT_OVERCURRENT)
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_CLEAR_FEATURE,
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GRUB_USB_HUB_FEATURE_C_PORT_OVERCURRENT, i, 0, 0);
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if (!dev->controller.dev->pending_reset &&
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(status & GRUB_USB_HUB_STATUS_C_PORT_CONNECTED))
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{
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_CLEAR_FEATURE,
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GRUB_USB_HUB_FEATURE_C_PORT_CONNECTED, i, 0, 0);
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detach_device (dev->children[i - 1]);
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dev->children[i - 1] = NULL;
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/* Connected and status of connection changed ? */
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if (status & GRUB_USB_HUB_STATUS_PORT_CONNECTED)
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{
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/* A device is actually connected to this port. */
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/* Wait for completion of insertion and stable power (USB spec.)
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* Should be at least 100ms, some devices requires more...
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* There is also another thing - some devices have worse contacts
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* and connected signal is unstable for some time - we should handle
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* it - but prevent deadlock in case when device is too faulty... */
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for (total = j = 0; (j < 250) && (total < 2000); j++, total++)
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{
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grub_millisleep (1);
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/* Get the port status. */
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err = grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_IN
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_GET_STATUS,
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0, i,
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sizeof (current_status),
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(char *) ¤t_status);
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if (err)
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{
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total = 2000;
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break;
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}
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if (!(current_status & GRUB_USB_HUB_STATUS_PORT_CONNECTED))
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j = 0;
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}
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grub_dprintf ("usb", "(non-root) total=%d\n", total);
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if (total >= 2000)
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continue;
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/* Now do reset of port. */
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_SET_FEATURE,
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GRUB_USB_HUB_FEATURE_PORT_RESET,
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i, 0, 0);
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rescan = 1;
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/* We cannot reset more than one device at the same time !
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* Resetting more devices together results in very bad
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* situation: more than one device has default address 0
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* at the same time !!!
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* Additionaly, we cannot perform another reset
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* anywhere on the same OHCI controller until
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* we will finish addressing of reseted device ! */
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dev->controller.dev->pending_reset = grub_get_time_ms () + 5000;
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return;
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}
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}
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if (status & GRUB_USB_HUB_STATUS_C_PORT_RESET)
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{
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grub_usb_control_msg (dev, (GRUB_USB_REQTYPE_OUT
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| GRUB_USB_REQTYPE_CLASS
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| GRUB_USB_REQTYPE_TARGET_OTHER),
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GRUB_USB_REQ_CLEAR_FEATURE,
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GRUB_USB_HUB_FEATURE_C_PORT_RESET, i, 0, 0);
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if (status & GRUB_USB_HUB_STATUS_PORT_CONNECTED)
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{
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grub_usb_speed_t speed;
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grub_usb_device_t next_dev;
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/* Determine the device speed. */
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if (status & GRUB_USB_HUB_STATUS_PORT_LOWSPEED)
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speed = GRUB_USB_SPEED_LOW;
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else
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{
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if (status & GRUB_USB_HUB_STATUS_PORT_HIGHSPEED)
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speed = GRUB_USB_SPEED_HIGH;
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else
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speed = GRUB_USB_SPEED_FULL;
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}
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/* Wait a recovery time after reset, spec. says 10ms */
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grub_millisleep (10);
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/* Add the device and assign a device address to it. */
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next_dev = grub_usb_hub_add_dev (&dev->controller, speed);
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dev->controller.dev->pending_reset = 0;
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if (! next_dev)
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continue;
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dev->children[i - 1] = next_dev;
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/* If the device is a Hub, scan it for more devices. */
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if (next_dev->descdev.class == 0x09)
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grub_usb_add_hub (next_dev);
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}
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}
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}
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}
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void
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grub_usb_poll_devices (void)
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{
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struct grub_usb_hub *hub;
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int i;
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for (hub = hubs; hub; hub = hub->next)
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{
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/* Do we have to recheck number of ports? */
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/* No, it should be never changed, it should be constant. */
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for (i = 0; i < hub->nports; i++)
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{
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grub_usb_speed_t speed = GRUB_USB_SPEED_NONE;
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int changed = 0;
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if (!hub->controller->dev->pending_reset)
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||
{
|
||
/* Check for possible timeout */
|
||
if (grub_get_time_ms () > hub->controller->dev->pending_reset)
|
||
{
|
||
/* Something went wrong, reset device was not
|
||
* addressed properly, timeout happened */
|
||
hub->controller->dev->pending_reset = 0;
|
||
speed = hub->controller->dev->detect_dev (hub->controller,
|
||
i, &changed);
|
||
}
|
||
}
|
||
if (changed)
|
||
{
|
||
detach_device (hub->devices[i]);
|
||
hub->devices[i] = NULL;
|
||
if (speed != GRUB_USB_SPEED_NONE)
|
||
attach_root_port (hub, i, speed);
|
||
}
|
||
}
|
||
}
|
||
|
||
while (1)
|
||
{
|
||
rescan = 0;
|
||
|
||
/* We should check changes of non-root hubs too. */
|
||
for (i = 0; i < GRUB_USBHUB_MAX_DEVICES; i++)
|
||
{
|
||
grub_usb_device_t dev = grub_usb_devs[i];
|
||
|
||
if (dev && dev->descdev.class == 0x09)
|
||
poll_nonroot_hub (dev);
|
||
}
|
||
if (!rescan)
|
||
break;
|
||
grub_millisleep (50);
|
||
}
|
||
|
||
}
|
||
|
||
int
|
||
grub_usb_iterate (int (*hook) (grub_usb_device_t dev))
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < GRUB_USBHUB_MAX_DEVICES; i++)
|
||
{
|
||
if (grub_usb_devs[i])
|
||
{
|
||
if (hook (grub_usb_devs[i]))
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|