659139d780
Simplifies power budget negotiation. Signed-off-by: Riku Voipio <riku.voipio@nokia.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
563 lines
16 KiB
C
563 lines
16 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-common.h"
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#include "usb.h"
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//#define DEBUG
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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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typedef struct USBHubState {
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USBDevice dev;
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int nb_ports;
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USBHubPort ports[MAX_PORTS];
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} USBHubState;
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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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static const uint8_t qemu_hub_dev_descriptor[] = {
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0x12, /* u8 bLength; */
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0x01, /* u8 bDescriptorType; Device */
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0x10, 0x01, /* u16 bcdUSB; v1.1 */
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0x09, /* u8 bDeviceClass; HUB_CLASSCODE */
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0x00, /* u8 bDeviceSubClass; */
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0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */
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0x08, /* u8 bMaxPacketSize0; 8 Bytes */
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0x00, 0x00, /* u16 idVendor; */
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0x00, 0x00, /* u16 idProduct; */
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0x01, 0x01, /* u16 bcdDevice */
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0x03, /* u8 iManufacturer; */
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0x02, /* u8 iProduct; */
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0x01, /* u8 iSerialNumber; */
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0x01 /* u8 bNumConfigurations; */
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};
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/* XXX: patch interrupt size */
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static const uint8_t qemu_hub_config_descriptor[] = {
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/* one configuration */
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0x09, /* u8 bLength; */
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0x02, /* u8 bDescriptorType; Configuration */
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0x19, 0x00, /* u16 wTotalLength; */
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0x01, /* u8 bNumInterfaces; (1) */
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0x01, /* u8 bConfigurationValue; */
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0x00, /* u8 iConfiguration; */
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0xe0, /* u8 bmAttributes;
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Bit 7: must be set,
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6: Self-powered,
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5: Remote wakeup,
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4..0: resvd */
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0x00, /* u8 MaxPower; */
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/* USB 1.1:
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* USB 2.0, single TT organization (mandatory):
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* one interface, protocol 0
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*
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* USB 2.0, multiple TT organization (optional):
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* two interfaces, protocols 1 (like single TT)
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* and 2 (multiple TT mode) ... config is
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* sometimes settable
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* NOT IMPLEMENTED
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*/
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/* one interface */
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0x09, /* u8 if_bLength; */
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0x04, /* u8 if_bDescriptorType; Interface */
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0x00, /* u8 if_bInterfaceNumber; */
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0x00, /* u8 if_bAlternateSetting; */
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0x01, /* u8 if_bNumEndpoints; */
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0x09, /* u8 if_bInterfaceClass; HUB_CLASSCODE */
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0x00, /* u8 if_bInterfaceSubClass; */
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0x00, /* u8 if_bInterfaceProtocol; [usb1.1 or single tt] */
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0x00, /* u8 if_iInterface; */
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/* one endpoint (status change endpoint) */
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0x07, /* u8 ep_bLength; */
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0x05, /* u8 ep_bDescriptorType; Endpoint */
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0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */
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0x03, /* u8 ep_bmAttributes; Interrupt */
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0x02, 0x00, /* u16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */
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0xff /* u8 ep_bInterval; (255ms -- usb 2.0 spec) */
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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 void usb_hub_attach(USBPort *port1, USBDevice *dev)
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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 (dev) {
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if (port->port.dev)
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usb_attach(port1, NULL);
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port->wPortStatus |= PORT_STAT_CONNECTION;
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port->wPortChange |= PORT_STAT_C_CONNECTION;
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if (dev->speed == USB_SPEED_LOW)
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port->wPortStatus |= PORT_STAT_LOW_SPEED;
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else
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port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
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port->port.dev = dev;
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/* send the attach message */
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usb_send_msg(dev, USB_MSG_ATTACH);
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} else {
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dev = port->port.dev;
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if (dev) {
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port->wPortStatus &= ~PORT_STAT_CONNECTION;
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port->wPortChange |= PORT_STAT_C_CONNECTION;
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if (port->wPortStatus & PORT_STAT_ENABLE) {
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port->wPortStatus &= ~PORT_STAT_ENABLE;
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port->wPortChange |= PORT_STAT_C_ENABLE;
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}
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/* send the detach message */
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usb_send_msg(dev, USB_MSG_DETACH);
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port->port.dev = NULL;
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}
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}
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}
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static void usb_hub_handle_reset(USBDevice *dev)
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{
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/* XXX: do it */
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}
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static int usb_hub_handle_control(USBDevice *dev, int request, int value,
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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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switch(request) {
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case DeviceRequest | USB_REQ_GET_STATUS:
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data[0] = (1 << USB_DEVICE_SELF_POWERED) |
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(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
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data[1] = 0x00;
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ret = 2;
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break;
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case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
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if (value == USB_DEVICE_REMOTE_WAKEUP) {
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dev->remote_wakeup = 0;
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} else {
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goto fail;
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}
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ret = 0;
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break;
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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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ret = 0;
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break;
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case DeviceOutRequest | USB_REQ_SET_FEATURE:
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if (value == USB_DEVICE_REMOTE_WAKEUP) {
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dev->remote_wakeup = 1;
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} else {
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goto fail;
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}
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ret = 0;
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break;
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case DeviceOutRequest | USB_REQ_SET_ADDRESS:
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dev->addr = value;
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ret = 0;
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break;
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case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
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switch(value >> 8) {
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case USB_DT_DEVICE:
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memcpy(data, qemu_hub_dev_descriptor,
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sizeof(qemu_hub_dev_descriptor));
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ret = sizeof(qemu_hub_dev_descriptor);
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break;
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case USB_DT_CONFIG:
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memcpy(data, qemu_hub_config_descriptor,
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sizeof(qemu_hub_config_descriptor));
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/* status change endpoint size based on number
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* of ports */
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data[22] = (s->nb_ports + 1 + 7) / 8;
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ret = sizeof(qemu_hub_config_descriptor);
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break;
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case USB_DT_STRING:
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switch(value & 0xff) {
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case 0:
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/* language ids */
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data[0] = 4;
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data[1] = 3;
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data[2] = 0x09;
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data[3] = 0x04;
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ret = 4;
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break;
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case 1:
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/* serial number */
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ret = set_usb_string(data, "314159");
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break;
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case 2:
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/* product description */
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ret = set_usb_string(data, "QEMU USB Hub");
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break;
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case 3:
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/* vendor description */
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ret = set_usb_string(data, "QEMU " QEMU_VERSION);
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break;
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default:
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goto fail;
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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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break;
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case DeviceRequest | USB_REQ_GET_CONFIGURATION:
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data[0] = 1;
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ret = 1;
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break;
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case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
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ret = 0;
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break;
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case DeviceRequest | USB_REQ_GET_INTERFACE:
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data[0] = 0;
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ret = 1;
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break;
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case DeviceOutRequest | USB_REQ_SET_INTERFACE:
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ret = 0;
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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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ret = 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->nb_ports)
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goto fail;
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port = &s->ports[n];
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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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ret = 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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} else {
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goto fail;
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}
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ret = 0;
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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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if (n >= s->nb_ports)
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goto fail;
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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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if (dev) {
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usb_send_msg(dev, USB_MSG_RESET);
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port->wPortChange |= PORT_STAT_C_RESET;
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/* set enable bit */
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port->wPortStatus |= PORT_STAT_ENABLE;
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}
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break;
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case PORT_POWER:
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break;
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default:
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goto fail;
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}
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ret = 0;
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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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USBDevice *dev;
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if (n >= s->nb_ports)
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goto fail;
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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_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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port->wPortStatus &= ~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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default:
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goto fail;
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}
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ret = 0;
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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->nb_ports;
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/* fill DeviceRemovable bits */
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limit = ((s->nb_ports + 1 + 7) / 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 + ((s->nb_ports + 7) / 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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ret = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
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data[0] = ret;
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break;
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}
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default:
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fail:
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ret = USB_RET_STALL;
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break;
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}
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return ret;
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}
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static int usb_hub_handle_data(USBDevice *dev, USBPacket *p)
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{
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USBHubState *s = (USBHubState *)dev;
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int ret;
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switch(p->pid) {
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case USB_TOKEN_IN:
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if (p->devep == 1) {
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USBHubPort *port;
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unsigned int status;
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int i, n;
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n = (s->nb_ports + 1 + 7) / 8;
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if (p->len == 1) { /* FreeBSD workaround */
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n = 1;
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} else if (n > p->len) {
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return USB_RET_BABBLE;
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}
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status = 0;
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for(i = 0; i < s->nb_ports; i++) {
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port = &s->ports[i];
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if (port->wPortChange)
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status |= (1 << (i + 1));
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}
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if (status != 0) {
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for(i = 0; i < n; i++) {
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p->data[i] = status >> (8 * i);
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}
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ret = n;
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} else {
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ret = USB_RET_NAK; /* usb11 11.13.1 */
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}
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} else {
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goto fail;
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}
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break;
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case USB_TOKEN_OUT:
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default:
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fail:
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ret = USB_RET_STALL;
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break;
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}
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return ret;
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}
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static int usb_hub_broadcast_packet(USBHubState *s, USBPacket *p)
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{
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USBHubPort *port;
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USBDevice *dev;
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int i, ret;
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for(i = 0; i < s->nb_ports; i++) {
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port = &s->ports[i];
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dev = port->port.dev;
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if (dev && (port->wPortStatus & PORT_STAT_ENABLE)) {
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ret = dev->info->handle_packet(dev, p);
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if (ret != USB_RET_NODEV) {
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return ret;
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}
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}
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}
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return USB_RET_NODEV;
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}
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static int usb_hub_handle_packet(USBDevice *dev, USBPacket *p)
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{
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USBHubState *s = (USBHubState *)dev;
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#if defined(DEBUG) && 0
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printf("usb_hub: pid=0x%x\n", pid);
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#endif
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if (dev->state == USB_STATE_DEFAULT &&
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dev->addr != 0 &&
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p->devaddr != dev->addr &&
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(p->pid == USB_TOKEN_SETUP ||
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p->pid == USB_TOKEN_OUT ||
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p->pid == USB_TOKEN_IN)) {
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/* broadcast the packet to the devices */
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return usb_hub_broadcast_packet(s, p);
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}
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return usb_generic_handle_packet(dev, p);
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}
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static void usb_hub_handle_destroy(USBDevice *dev)
|
|
{
|
|
USBHubState *s = (USBHubState *)dev;
|
|
int i;
|
|
|
|
for (i = 0; i < s->nb_ports; i++) {
|
|
usb_unregister_port(usb_bus_from_device(dev),
|
|
&s->ports[i].port);
|
|
}
|
|
}
|
|
|
|
static int usb_hub_initfn(USBDevice *dev)
|
|
{
|
|
USBHubState *s = DO_UPCAST(USBHubState, dev, dev);
|
|
USBHubPort *port;
|
|
int i;
|
|
|
|
s->dev.speed = USB_SPEED_FULL,
|
|
s->nb_ports = MAX_PORTS; /* FIXME: make configurable */
|
|
for (i = 0; i < s->nb_ports; i++) {
|
|
port = &s->ports[i];
|
|
usb_register_port(usb_bus_from_device(dev),
|
|
&port->port, s, i, usb_hub_attach);
|
|
port->wPortStatus = PORT_STAT_POWER;
|
|
port->wPortChange = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct USBDeviceInfo hub_info = {
|
|
.product_desc = "QEMU USB Hub",
|
|
.qdev.name = "usb-hub",
|
|
.qdev.size = sizeof(USBHubState),
|
|
.init = usb_hub_initfn,
|
|
.handle_packet = usb_hub_handle_packet,
|
|
.handle_reset = usb_hub_handle_reset,
|
|
.handle_control = usb_hub_handle_control,
|
|
.handle_data = usb_hub_handle_data,
|
|
.handle_destroy = usb_hub_handle_destroy,
|
|
};
|
|
|
|
static void usb_hub_register_devices(void)
|
|
{
|
|
usb_qdev_register(&hub_info);
|
|
}
|
|
device_init(usb_hub_register_devices)
|