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705 lines
21 KiB
C
705 lines
21 KiB
C
/*
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* QEMU USB HUB emulation
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*
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* Copyright (c) 2005 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "qemu/timer.h"
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#include "trace.h"
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#include "hw/qdev-properties.h"
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#include "hw/usb.h"
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#include "migration/vmstate.h"
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#include "desc.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "qom/object.h"
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#define MAX_PORTS 8
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typedef struct USBHubPort {
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USBPort port;
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uint16_t wPortStatus;
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uint16_t wPortChange;
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} USBHubPort;
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struct USBHubState {
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USBDevice dev;
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USBEndpoint *intr;
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uint32_t num_ports;
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bool port_power;
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QEMUTimer *port_timer;
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USBHubPort ports[MAX_PORTS];
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};
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#define TYPE_USB_HUB "usb-hub"
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OBJECT_DECLARE_SIMPLE_TYPE(USBHubState, USB_HUB)
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#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
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#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
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#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
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#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
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#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
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#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
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#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
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#define PORT_STAT_CONNECTION 0x0001
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#define PORT_STAT_ENABLE 0x0002
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#define PORT_STAT_SUSPEND 0x0004
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#define PORT_STAT_OVERCURRENT 0x0008
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#define PORT_STAT_RESET 0x0010
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#define PORT_STAT_POWER 0x0100
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#define PORT_STAT_LOW_SPEED 0x0200
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#define PORT_STAT_HIGH_SPEED 0x0400
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#define PORT_STAT_TEST 0x0800
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#define PORT_STAT_INDICATOR 0x1000
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#define PORT_STAT_C_CONNECTION 0x0001
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#define PORT_STAT_C_ENABLE 0x0002
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#define PORT_STAT_C_SUSPEND 0x0004
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#define PORT_STAT_C_OVERCURRENT 0x0008
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#define PORT_STAT_C_RESET 0x0010
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#define PORT_CONNECTION 0
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#define PORT_ENABLE 1
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#define PORT_SUSPEND 2
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#define PORT_OVERCURRENT 3
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#define PORT_RESET 4
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#define PORT_POWER 8
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#define PORT_LOWSPEED 9
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#define PORT_HIGHSPEED 10
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#define PORT_C_CONNECTION 16
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#define PORT_C_ENABLE 17
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#define PORT_C_SUSPEND 18
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#define PORT_C_OVERCURRENT 19
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#define PORT_C_RESET 20
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#define PORT_TEST 21
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#define PORT_INDICATOR 22
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/* same as Linux kernel root hubs */
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enum {
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STR_MANUFACTURER = 1,
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STR_PRODUCT,
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STR_SERIALNUMBER,
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};
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static const USBDescStrings desc_strings = {
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[STR_MANUFACTURER] = "QEMU",
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[STR_PRODUCT] = "QEMU USB Hub",
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[STR_SERIALNUMBER] = "314159",
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};
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static const USBDescIface desc_iface_hub = {
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.bInterfaceNumber = 0,
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.bNumEndpoints = 1,
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.bInterfaceClass = USB_CLASS_HUB,
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.eps = (USBDescEndpoint[]) {
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{
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.bEndpointAddress = USB_DIR_IN | 0x01,
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.bmAttributes = USB_ENDPOINT_XFER_INT,
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.wMaxPacketSize = 1 + DIV_ROUND_UP(MAX_PORTS, 8),
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.bInterval = 0xff,
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},
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}
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};
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static const USBDescDevice desc_device_hub = {
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.bcdUSB = 0x0110,
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.bDeviceClass = USB_CLASS_HUB,
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.bMaxPacketSize0 = 8,
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.bNumConfigurations = 1,
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.confs = (USBDescConfig[]) {
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{
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.bNumInterfaces = 1,
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.bConfigurationValue = 1,
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.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER |
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USB_CFG_ATT_WAKEUP,
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.nif = 1,
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.ifs = &desc_iface_hub,
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},
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},
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};
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static const USBDesc desc_hub = {
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.id = {
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.idVendor = 0x0409,
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.idProduct = 0x55aa,
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.bcdDevice = 0x0101,
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.iManufacturer = STR_MANUFACTURER,
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.iProduct = STR_PRODUCT,
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.iSerialNumber = STR_SERIALNUMBER,
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},
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.full = &desc_device_hub,
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.str = desc_strings,
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};
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static const uint8_t qemu_hub_hub_descriptor[] =
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{
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0x00, /* u8 bLength; patched in later */
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0x29, /* u8 bDescriptorType; Hub-descriptor */
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0x00, /* u8 bNbrPorts; (patched later) */
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0x0a, /* u16 wHubCharacteristics; */
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0x00, /* (per-port OC, no power switching) */
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0x01, /* u8 bPwrOn2pwrGood; 2ms */
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0x00 /* u8 bHubContrCurrent; 0 mA */
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/* DeviceRemovable and PortPwrCtrlMask patched in later */
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};
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static bool usb_hub_port_change(USBHubPort *port, uint16_t status)
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{
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bool notify = false;
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if (status & 0x1f) {
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port->wPortChange |= status;
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notify = true;
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}
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return notify;
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}
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static bool usb_hub_port_set(USBHubPort *port, uint16_t status)
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{
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if (port->wPortStatus & status) {
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return false;
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}
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port->wPortStatus |= status;
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return usb_hub_port_change(port, status);
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}
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static bool usb_hub_port_clear(USBHubPort *port, uint16_t status)
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{
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if (!(port->wPortStatus & status)) {
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return false;
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}
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port->wPortStatus &= ~status;
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return usb_hub_port_change(port, status);
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}
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static bool usb_hub_port_update(USBHubPort *port)
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{
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bool notify = false;
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if (port->port.dev && port->port.dev->attached) {
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notify = usb_hub_port_set(port, PORT_STAT_CONNECTION);
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if (port->port.dev->speed == USB_SPEED_LOW) {
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usb_hub_port_set(port, PORT_STAT_LOW_SPEED);
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} else {
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usb_hub_port_clear(port, PORT_STAT_LOW_SPEED);
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}
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}
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return notify;
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}
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static void usb_hub_port_update_timer(void *opaque)
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{
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USBHubState *s = opaque;
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bool notify = false;
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int i;
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for (i = 0; i < s->num_ports; i++) {
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notify |= usb_hub_port_update(&s->ports[i]);
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}
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if (notify) {
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usb_wakeup(s->intr, 0);
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}
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}
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static void usb_hub_attach(USBPort *port1)
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{
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USBHubState *s = port1->opaque;
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USBHubPort *port = &s->ports[port1->index];
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trace_usb_hub_attach(s->dev.addr, port1->index + 1);
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usb_hub_port_update(port);
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usb_wakeup(s->intr, 0);
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}
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static void usb_hub_detach(USBPort *port1)
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{
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USBHubState *s = port1->opaque;
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USBHubPort *port = &s->ports[port1->index];
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trace_usb_hub_detach(s->dev.addr, port1->index + 1);
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usb_wakeup(s->intr, 0);
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/* Let upstream know the device on this port is gone */
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s->dev.port->ops->child_detach(s->dev.port, port1->dev);
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usb_hub_port_clear(port, PORT_STAT_CONNECTION);
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usb_hub_port_clear(port, PORT_STAT_ENABLE);
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usb_hub_port_clear(port, PORT_STAT_SUSPEND);
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usb_wakeup(s->intr, 0);
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}
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static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
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{
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USBHubState *s = port1->opaque;
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/* Pass along upstream */
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s->dev.port->ops->child_detach(s->dev.port, child);
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}
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static void usb_hub_wakeup(USBPort *port1)
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{
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USBHubState *s = port1->opaque;
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USBHubPort *port = &s->ports[port1->index];
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if (usb_hub_port_clear(port, PORT_STAT_SUSPEND)) {
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usb_wakeup(s->intr, 0);
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}
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}
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static void usb_hub_complete(USBPort *port, USBPacket *packet)
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{
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USBHubState *s = port->opaque;
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/*
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* Just pass it along upstream for now.
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*
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* If we ever implement usb 2.0 split transactions this will
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* become a little more complicated ...
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*
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* Can't use usb_packet_complete() here because packet->owner is
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* cleared already, go call the ->complete() callback directly
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* instead.
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*/
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s->dev.port->ops->complete(s->dev.port, packet);
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}
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static USBDevice *usb_hub_find_device(USBDevice *dev, uint8_t addr)
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{
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USBHubState *s = USB_HUB(dev);
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USBHubPort *port;
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USBDevice *downstream;
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int i;
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for (i = 0; i < s->num_ports; i++) {
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port = &s->ports[i];
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if (!(port->wPortStatus & PORT_STAT_ENABLE)) {
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continue;
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}
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downstream = usb_find_device(&port->port, addr);
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if (downstream != NULL) {
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return downstream;
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}
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}
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return NULL;
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}
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static void usb_hub_handle_reset(USBDevice *dev)
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{
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USBHubState *s = USB_HUB(dev);
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USBHubPort *port;
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int i;
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trace_usb_hub_reset(s->dev.addr);
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for (i = 0; i < s->num_ports; i++) {
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port = s->ports + i;
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port->wPortStatus = 0;
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port->wPortChange = 0;
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usb_hub_port_set(port, PORT_STAT_POWER);
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usb_hub_port_update(port);
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}
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}
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static const char *feature_name(int feature)
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{
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static const char *name[] = {
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[PORT_CONNECTION] = "connection",
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[PORT_ENABLE] = "enable",
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[PORT_SUSPEND] = "suspend",
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[PORT_OVERCURRENT] = "overcurrent",
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[PORT_RESET] = "reset",
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[PORT_POWER] = "power",
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[PORT_LOWSPEED] = "lowspeed",
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[PORT_HIGHSPEED] = "highspeed",
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[PORT_C_CONNECTION] = "change-connection",
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[PORT_C_ENABLE] = "change-enable",
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[PORT_C_SUSPEND] = "change-suspend",
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[PORT_C_OVERCURRENT] = "change-overcurrent",
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[PORT_C_RESET] = "change-reset",
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[PORT_TEST] = "test",
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[PORT_INDICATOR] = "indicator",
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};
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if (feature < 0 || feature >= ARRAY_SIZE(name)) {
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return "?";
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}
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return name[feature] ?: "?";
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}
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static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
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int request, int value, int index, int length, uint8_t *data)
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{
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USBHubState *s = (USBHubState *)dev;
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int ret;
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trace_usb_hub_control(s->dev.addr, request, value, index, length);
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ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
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if (ret >= 0) {
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return;
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}
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switch(request) {
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case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
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if (value == 0 && index != 0x81) { /* clear ep halt */
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goto fail;
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}
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break;
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/* usb specific requests */
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case GetHubStatus:
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data[0] = 0;
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data[1] = 0;
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data[2] = 0;
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data[3] = 0;
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p->actual_length = 4;
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break;
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case GetPortStatus:
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{
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unsigned int n = index - 1;
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USBHubPort *port;
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if (n >= s->num_ports) {
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goto fail;
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}
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port = &s->ports[n];
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trace_usb_hub_get_port_status(s->dev.addr, index,
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port->wPortStatus,
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port->wPortChange);
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data[0] = port->wPortStatus;
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data[1] = port->wPortStatus >> 8;
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data[2] = port->wPortChange;
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data[3] = port->wPortChange >> 8;
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p->actual_length = 4;
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}
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break;
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case SetHubFeature:
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case ClearHubFeature:
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if (value != 0 && value != 1) {
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goto fail;
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}
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break;
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case SetPortFeature:
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{
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unsigned int n = index - 1;
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USBHubPort *port;
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USBDevice *dev;
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trace_usb_hub_set_port_feature(s->dev.addr, index,
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feature_name(value));
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if (n >= s->num_ports) {
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goto fail;
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}
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port = &s->ports[n];
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dev = port->port.dev;
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switch(value) {
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case PORT_SUSPEND:
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port->wPortStatus |= PORT_STAT_SUSPEND;
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break;
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case PORT_RESET:
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usb_hub_port_set(port, PORT_STAT_RESET);
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usb_hub_port_clear(port, PORT_STAT_RESET);
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if (dev && dev->attached) {
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usb_device_reset(dev);
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usb_hub_port_set(port, PORT_STAT_ENABLE);
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}
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usb_wakeup(s->intr, 0);
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break;
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case PORT_POWER:
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if (s->port_power) {
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int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
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usb_hub_port_set(port, PORT_STAT_POWER);
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timer_mod(s->port_timer, now + 5000000); /* 5 ms */
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}
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break;
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default:
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goto fail;
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}
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}
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break;
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case ClearPortFeature:
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{
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unsigned int n = index - 1;
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USBHubPort *port;
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trace_usb_hub_clear_port_feature(s->dev.addr, index,
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feature_name(value));
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if (n >= s->num_ports) {
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goto fail;
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}
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port = &s->ports[n];
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switch(value) {
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case PORT_ENABLE:
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port->wPortStatus &= ~PORT_STAT_ENABLE;
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break;
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case PORT_C_ENABLE:
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port->wPortChange &= ~PORT_STAT_C_ENABLE;
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break;
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case PORT_SUSPEND:
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usb_hub_port_clear(port, PORT_STAT_SUSPEND);
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break;
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case PORT_C_SUSPEND:
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port->wPortChange &= ~PORT_STAT_C_SUSPEND;
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break;
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case PORT_C_CONNECTION:
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port->wPortChange &= ~PORT_STAT_C_CONNECTION;
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break;
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case PORT_C_OVERCURRENT:
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port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
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break;
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case PORT_C_RESET:
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port->wPortChange &= ~PORT_STAT_C_RESET;
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break;
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case PORT_POWER:
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if (s->port_power) {
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usb_hub_port_clear(port, PORT_STAT_POWER);
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usb_hub_port_clear(port, PORT_STAT_CONNECTION);
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usb_hub_port_clear(port, PORT_STAT_ENABLE);
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usb_hub_port_clear(port, PORT_STAT_SUSPEND);
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port->wPortChange = 0;
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}
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default:
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goto fail;
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}
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}
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break;
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case GetHubDescriptor:
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{
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unsigned int n, limit, var_hub_size = 0;
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memcpy(data, qemu_hub_hub_descriptor,
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sizeof(qemu_hub_hub_descriptor));
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data[2] = s->num_ports;
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if (s->port_power) {
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data[3] &= ~0x03;
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data[3] |= 0x01;
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}
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/* fill DeviceRemovable bits */
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limit = DIV_ROUND_UP(s->num_ports + 1, 8) + 7;
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for (n = 7; n < limit; n++) {
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data[n] = 0x00;
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var_hub_size++;
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}
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/* fill PortPwrCtrlMask bits */
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limit = limit + DIV_ROUND_UP(s->num_ports, 8);
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for (;n < limit; n++) {
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data[n] = 0xff;
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var_hub_size++;
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}
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p->actual_length = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
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data[0] = p->actual_length;
|
|
break;
|
|
}
|
|
default:
|
|
fail:
|
|
p->status = USB_RET_STALL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
|
|
{
|
|
USBHubState *s = (USBHubState *)dev;
|
|
|
|
switch(p->pid) {
|
|
case USB_TOKEN_IN:
|
|
if (p->ep->nr == 1) {
|
|
USBHubPort *port;
|
|
unsigned int status;
|
|
uint8_t buf[4];
|
|
int i, n;
|
|
n = DIV_ROUND_UP(s->num_ports + 1, 8);
|
|
if (p->iov.size == 1) { /* FreeBSD workaround */
|
|
n = 1;
|
|
} else if (n > p->iov.size) {
|
|
p->status = USB_RET_BABBLE;
|
|
return;
|
|
}
|
|
status = 0;
|
|
for (i = 0; i < s->num_ports; i++) {
|
|
port = &s->ports[i];
|
|
if (port->wPortChange)
|
|
status |= (1 << (i + 1));
|
|
}
|
|
if (status != 0) {
|
|
trace_usb_hub_status_report(s->dev.addr, status);
|
|
for(i = 0; i < n; i++) {
|
|
buf[i] = status >> (8 * i);
|
|
}
|
|
usb_packet_copy(p, buf, n);
|
|
} else {
|
|
p->status = USB_RET_NAK; /* usb11 11.13.1 */
|
|
}
|
|
} else {
|
|
goto fail;
|
|
}
|
|
break;
|
|
case USB_TOKEN_OUT:
|
|
default:
|
|
fail:
|
|
p->status = USB_RET_STALL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void usb_hub_unrealize(USBDevice *dev)
|
|
{
|
|
USBHubState *s = (USBHubState *)dev;
|
|
int i;
|
|
|
|
for (i = 0; i < s->num_ports; i++) {
|
|
usb_unregister_port(usb_bus_from_device(dev),
|
|
&s->ports[i].port);
|
|
}
|
|
|
|
timer_free(s->port_timer);
|
|
}
|
|
|
|
static USBPortOps usb_hub_port_ops = {
|
|
.attach = usb_hub_attach,
|
|
.detach = usb_hub_detach,
|
|
.child_detach = usb_hub_child_detach,
|
|
.wakeup = usb_hub_wakeup,
|
|
.complete = usb_hub_complete,
|
|
};
|
|
|
|
static void usb_hub_realize(USBDevice *dev, Error **errp)
|
|
{
|
|
USBHubState *s = USB_HUB(dev);
|
|
USBHubPort *port;
|
|
int i;
|
|
|
|
if (s->num_ports < 1 || s->num_ports > MAX_PORTS) {
|
|
error_setg(errp, "num_ports (%d) out of range (1..%d)",
|
|
s->num_ports, MAX_PORTS);
|
|
return;
|
|
}
|
|
|
|
if (dev->port->hubcount == 5) {
|
|
error_setg(errp, "usb hub chain too deep");
|
|
return;
|
|
}
|
|
|
|
usb_desc_create_serial(dev);
|
|
usb_desc_init(dev);
|
|
s->port_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
|
|
usb_hub_port_update_timer, s);
|
|
s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
|
|
for (i = 0; i < s->num_ports; i++) {
|
|
port = &s->ports[i];
|
|
usb_register_port(usb_bus_from_device(dev),
|
|
&port->port, s, i, &usb_hub_port_ops,
|
|
USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
|
|
usb_port_location(&port->port, dev->port, i+1);
|
|
}
|
|
usb_hub_handle_reset(dev);
|
|
}
|
|
|
|
static const VMStateDescription vmstate_usb_hub_port = {
|
|
.name = "usb-hub-port",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT16(wPortStatus, USBHubPort),
|
|
VMSTATE_UINT16(wPortChange, USBHubPort),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static bool usb_hub_port_timer_needed(void *opaque)
|
|
{
|
|
USBHubState *s = opaque;
|
|
|
|
return s->port_power;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_usb_hub_port_timer = {
|
|
.name = "usb-hub/port-timer",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.needed = usb_hub_port_timer_needed,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_TIMER_PTR(port_timer, USBHubState),
|
|
VMSTATE_END_OF_LIST()
|
|
},
|
|
};
|
|
|
|
static const VMStateDescription vmstate_usb_hub = {
|
|
.name = "usb-hub",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_USB_DEVICE(dev, USBHubState),
|
|
VMSTATE_STRUCT_ARRAY(ports, USBHubState, MAX_PORTS, 0,
|
|
vmstate_usb_hub_port, USBHubPort),
|
|
VMSTATE_END_OF_LIST()
|
|
},
|
|
.subsections = (const VMStateDescription * []) {
|
|
&vmstate_usb_hub_port_timer,
|
|
NULL
|
|
}
|
|
};
|
|
|
|
static Property usb_hub_properties[] = {
|
|
DEFINE_PROP_UINT32("ports", USBHubState, num_ports, 8),
|
|
DEFINE_PROP_BOOL("port-power", USBHubState, port_power, false),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void usb_hub_class_initfn(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
|
|
|
|
uc->realize = usb_hub_realize;
|
|
uc->product_desc = "QEMU USB Hub";
|
|
uc->usb_desc = &desc_hub;
|
|
uc->find_device = usb_hub_find_device;
|
|
uc->handle_reset = usb_hub_handle_reset;
|
|
uc->handle_control = usb_hub_handle_control;
|
|
uc->handle_data = usb_hub_handle_data;
|
|
uc->unrealize = usb_hub_unrealize;
|
|
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
|
|
dc->fw_name = "hub";
|
|
dc->vmsd = &vmstate_usb_hub;
|
|
device_class_set_props(dc, usb_hub_properties);
|
|
}
|
|
|
|
static const TypeInfo hub_info = {
|
|
.name = TYPE_USB_HUB,
|
|
.parent = TYPE_USB_DEVICE,
|
|
.instance_size = sizeof(USBHubState),
|
|
.class_init = usb_hub_class_initfn,
|
|
};
|
|
|
|
static void usb_hub_register_types(void)
|
|
{
|
|
type_register_static(&hub_info);
|
|
}
|
|
|
|
type_init(usb_hub_register_types)
|