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qemu/hw/usb.c
pbrook ce5c37c2a4 Fix off by one length calciulation. 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1781 c046a42c-6fe2-441c-8c8c-71466251a162
2006-03-11 20:37:58 +00:00

691 lines
21 KiB
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/*
* QEMU USB emulation
*
* Copyright (c) 2005 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "vl.h"
void usb_attach(USBPort *port, USBDevice *dev)
{
port->attach(port, dev);
}
/**********************/
/* generic USB device helpers (you are not forced to use them when
writing your USB device driver, but they help handling the
protocol)
*/
#define SETUP_STATE_IDLE 0
#define SETUP_STATE_DATA 1
#define SETUP_STATE_ACK 2
int usb_generic_handle_packet(USBDevice *s, int pid,
uint8_t devaddr, uint8_t devep,
uint8_t *data, int len)
{
int l, ret = 0;
switch(pid) {
case USB_MSG_ATTACH:
s->state = USB_STATE_ATTACHED;
break;
case USB_MSG_DETACH:
s->state = USB_STATE_NOTATTACHED;
break;
case USB_MSG_RESET:
s->remote_wakeup = 0;
s->addr = 0;
s->state = USB_STATE_DEFAULT;
s->handle_reset(s);
break;
case USB_TOKEN_SETUP:
if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
return USB_RET_NODEV;
if (len != 8)
goto fail;
memcpy(s->setup_buf, data, 8);
s->setup_len = (s->setup_buf[7] << 8) | s->setup_buf[6];
s->setup_index = 0;
if (s->setup_buf[0] & USB_DIR_IN) {
ret = s->handle_control(s,
(s->setup_buf[0] << 8) | s->setup_buf[1],
(s->setup_buf[3] << 8) | s->setup_buf[2],
(s->setup_buf[5] << 8) | s->setup_buf[4],
s->setup_len,
s->data_buf);
if (ret < 0)
return ret;
if (ret < s->setup_len)
s->setup_len = ret;
s->setup_state = SETUP_STATE_DATA;
} else {
if (s->setup_len == 0)
s->setup_state = SETUP_STATE_ACK;
else
s->setup_state = SETUP_STATE_DATA;
}
break;
case USB_TOKEN_IN:
if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
return USB_RET_NODEV;
switch(devep) {
case 0:
switch(s->setup_state) {
case SETUP_STATE_ACK:
s->setup_state = SETUP_STATE_IDLE;
if (!(s->setup_buf[0] & USB_DIR_IN)) {
ret = s->handle_control(s,
(s->setup_buf[0] << 8) | s->setup_buf[1],
(s->setup_buf[3] << 8) | s->setup_buf[2],
(s->setup_buf[5] << 8) | s->setup_buf[4],
s->setup_len,
s->data_buf);
if (ret > 0)
ret = 0;
} else {
goto fail;
}
break;
case SETUP_STATE_DATA:
if (s->setup_buf[0] & USB_DIR_IN) {
l = s->setup_len - s->setup_index;
if (l > len)
l = len;
memcpy(data, s->data_buf + s->setup_index, l);
s->setup_index += l;
if (s->setup_index >= s->setup_len)
s->setup_state = SETUP_STATE_ACK;
ret = l;
} else {
s->setup_state = SETUP_STATE_IDLE;
goto fail;
}
break;
default:
goto fail;
}
break;
default:
ret = s->handle_data(s, pid, devep, data, len);
break;
}
break;
case USB_TOKEN_OUT:
if (s->state < USB_STATE_DEFAULT || devaddr != s->addr)
return USB_RET_NODEV;
switch(devep) {
case 0:
switch(s->setup_state) {
case SETUP_STATE_ACK:
s->setup_state = SETUP_STATE_IDLE;
if (s->setup_buf[0] & USB_DIR_IN) {
/* transfer OK */
} else {
goto fail;
}
break;
case SETUP_STATE_DATA:
if (!(s->setup_buf[0] & USB_DIR_IN)) {
l = s->setup_len - s->setup_index;
if (l > len)
l = len;
memcpy(s->data_buf + s->setup_index, data, l);
s->setup_index += l;
if (s->setup_index >= s->setup_len)
s->setup_state = SETUP_STATE_ACK;
ret = l;
} else {
s->setup_state = SETUP_STATE_IDLE;
goto fail;
}
break;
default:
goto fail;
}
break;
default:
ret = s->handle_data(s, pid, devep, data, len);
break;
}
break;
default:
fail:
ret = USB_RET_STALL;
break;
}
return ret;
}
/* XXX: fix overflow */
int set_usb_string(uint8_t *buf, const char *str)
{
int len, i;
uint8_t *q;
q = buf;
len = strlen(str);
*q++ = 2 * len + 2;
*q++ = 3;
for(i = 0; i < len; i++) {
*q++ = str[i];
*q++ = 0;
}
return q - buf;
}
/**********************/
/* USB hub emulation */
//#define DEBUG
#define MAX_PORTS 8
typedef struct USBHubPort {
USBPort port;
uint16_t wPortStatus;
uint16_t wPortChange;
} USBHubPort;
typedef struct USBHubState {
USBDevice dev;
int nb_ports;
USBHubPort ports[MAX_PORTS];
} USBHubState;
#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
#define PORT_STAT_CONNECTION 0x0001
#define PORT_STAT_ENABLE 0x0002
#define PORT_STAT_SUSPEND 0x0004
#define PORT_STAT_OVERCURRENT 0x0008
#define PORT_STAT_RESET 0x0010
#define PORT_STAT_POWER 0x0100
#define PORT_STAT_LOW_SPEED 0x0200
#define PORT_STAT_HIGH_SPEED 0x0400
#define PORT_STAT_TEST 0x0800
#define PORT_STAT_INDICATOR 0x1000
#define PORT_STAT_C_CONNECTION 0x0001
#define PORT_STAT_C_ENABLE 0x0002
#define PORT_STAT_C_SUSPEND 0x0004
#define PORT_STAT_C_OVERCURRENT 0x0008
#define PORT_STAT_C_RESET 0x0010
#define PORT_CONNECTION 0
#define PORT_ENABLE 1
#define PORT_SUSPEND 2
#define PORT_OVERCURRENT 3
#define PORT_RESET 4
#define PORT_POWER 8
#define PORT_LOWSPEED 9
#define PORT_HIGHSPEED 10
#define PORT_C_CONNECTION 16
#define PORT_C_ENABLE 17
#define PORT_C_SUSPEND 18
#define PORT_C_OVERCURRENT 19
#define PORT_C_RESET 20
#define PORT_TEST 21
#define PORT_INDICATOR 22
/* same as Linux kernel root hubs */
static const uint8_t qemu_hub_dev_descriptor[] = {
0x12, /* u8 bLength; */
0x01, /* u8 bDescriptorType; Device */
0x10, 0x01, /* u16 bcdUSB; v1.1 */
0x09, /* u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* u8 bDeviceSubClass; */
0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */
0x08, /* u8 bMaxPacketSize0; 8 Bytes */
0x00, 0x00, /* u16 idVendor; */
0x00, 0x00, /* u16 idProduct; */
0x01, 0x01, /* u16 bcdDevice */
0x03, /* u8 iManufacturer; */
0x02, /* u8 iProduct; */
0x01, /* u8 iSerialNumber; */
0x01 /* u8 bNumConfigurations; */
};
/* XXX: patch interrupt size */
static const uint8_t qemu_hub_config_descriptor[] = {
/* one configuration */
0x09, /* u8 bLength; */
0x02, /* u8 bDescriptorType; Configuration */
0x19, 0x00, /* u16 wTotalLength; */
0x01, /* u8 bNumInterfaces; (1) */
0x01, /* u8 bConfigurationValue; */
0x00, /* u8 iConfiguration; */
0xc0, /* u8 bmAttributes;
Bit 7: must be set,
6: Self-powered,
5: Remote wakeup,
4..0: resvd */
0x00, /* u8 MaxPower; */
/* USB 1.1:
* USB 2.0, single TT organization (mandatory):
* one interface, protocol 0
*
* USB 2.0, multiple TT organization (optional):
* two interfaces, protocols 1 (like single TT)
* and 2 (multiple TT mode) ... config is
* sometimes settable
* NOT IMPLEMENTED
*/
/* one interface */
0x09, /* u8 if_bLength; */
0x04, /* u8 if_bDescriptorType; Interface */
0x00, /* u8 if_bInterfaceNumber; */
0x00, /* u8 if_bAlternateSetting; */
0x01, /* u8 if_bNumEndpoints; */
0x09, /* u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* u8 if_bInterfaceSubClass; */
0x00, /* u8 if_bInterfaceProtocol; [usb1.1 or single tt] */
0x00, /* u8 if_iInterface; */
/* one endpoint (status change endpoint) */
0x07, /* u8 ep_bLength; */
0x05, /* u8 ep_bDescriptorType; Endpoint */
0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* u8 ep_bmAttributes; Interrupt */
0x02, 0x00, /* u16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */
0xff /* u8 ep_bInterval; (255ms -- usb 2.0 spec) */
};
static const uint8_t qemu_hub_hub_descriptor[] =
{
0x09, /* u8 bLength; */
0x29, /* u8 bDescriptorType; Hub-descriptor */
0x00, /* u8 bNbrPorts; (patched later) */
0x0a, /* u16 wHubCharacteristics; */
0x00, /* (per-port OC, no power switching) */
0x01, /* u8 bPwrOn2pwrGood; 2ms */
0x00, /* u8 bHubContrCurrent; 0 mA */
0x00, /* u8 DeviceRemovable; *** 7 Ports max *** */
0xff /* u8 PortPwrCtrlMask; *** 7 ports max *** */
};
static void usb_hub_attach(USBPort *port1, USBDevice *dev)
{
USBHubState *s = port1->opaque;
USBHubPort *port = &s->ports[port1->index];
if (dev) {
if (port->port.dev)
usb_attach(port1, NULL);
port->wPortStatus |= PORT_STAT_CONNECTION;
port->wPortChange |= PORT_STAT_C_CONNECTION;
if (dev->speed == USB_SPEED_LOW)
port->wPortStatus |= PORT_STAT_LOW_SPEED;
else
port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
port->port.dev = dev;
} else {
dev = port->port.dev;
if (dev) {
port->wPortStatus &= ~PORT_STAT_CONNECTION;
port->wPortChange |= PORT_STAT_C_CONNECTION;
if (port->wPortStatus & PORT_STAT_ENABLE) {
port->wPortStatus &= ~PORT_STAT_ENABLE;
port->wPortChange |= PORT_STAT_C_ENABLE;
}
port->port.dev = NULL;
}
}
}
static void usb_hub_handle_reset(USBDevice *dev)
{
/* XXX: do it */
}
static int usb_hub_handle_control(USBDevice *dev, int request, int value,
int index, int length, uint8_t *data)
{
USBHubState *s = (USBHubState *)dev;
int ret;
switch(request) {
case DeviceRequest | USB_REQ_GET_STATUS:
data[0] = (1 << USB_DEVICE_SELF_POWERED) |
(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
data[1] = 0x00;
ret = 2;
break;
case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
if (value == USB_DEVICE_REMOTE_WAKEUP) {
dev->remote_wakeup = 0;
} else {
goto fail;
}
ret = 0;
break;
case DeviceOutRequest | USB_REQ_SET_FEATURE:
if (value == USB_DEVICE_REMOTE_WAKEUP) {
dev->remote_wakeup = 1;
} else {
goto fail;
}
ret = 0;
break;
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
dev->addr = value;
ret = 0;
break;
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
switch(value >> 8) {
case USB_DT_DEVICE:
memcpy(data, qemu_hub_dev_descriptor,
sizeof(qemu_hub_dev_descriptor));
ret = sizeof(qemu_hub_dev_descriptor);
break;
case USB_DT_CONFIG:
memcpy(data, qemu_hub_config_descriptor,
sizeof(qemu_hub_config_descriptor));
ret = sizeof(qemu_hub_config_descriptor);
break;
case USB_DT_STRING:
switch(value & 0xff) {
case 0:
/* language ids */
data[0] = 4;
data[1] = 3;
data[2] = 0x09;
data[3] = 0x04;
ret = 4;
break;
case 1:
/* serial number */
ret = set_usb_string(data, "314159");
break;
case 2:
/* product description */
ret = set_usb_string(data, "QEMU USB Hub");
break;
case 3:
/* vendor description */
ret = set_usb_string(data, "QEMU " QEMU_VERSION);
break;
default:
goto fail;
}
break;
default:
goto fail;
}
break;
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
data[0] = 1;
ret = 1;
break;
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
ret = 0;
break;
case DeviceRequest | USB_REQ_GET_INTERFACE:
data[0] = 0;
ret = 1;
break;
case DeviceOutRequest | USB_REQ_SET_INTERFACE:
ret = 0;
break;
/* usb specific requests */
case GetHubStatus:
data[0] = 0;
data[1] = 0;
data[2] = 0;
data[3] = 0;
ret = 4;
break;
case GetPortStatus:
{
unsigned int n = index - 1;
USBHubPort *port;
if (n >= s->nb_ports)
goto fail;
port = &s->ports[n];
data[0] = port->wPortStatus;
data[1] = port->wPortStatus >> 8;
data[2] = port->wPortChange;
data[3] = port->wPortChange >> 8;
ret = 4;
}
break;
case SetHubFeature:
case ClearHubFeature:
if (value == 0 || value == 1) {
} else {
goto fail;
}
ret = 0;
break;
case SetPortFeature:
{
unsigned int n = index - 1;
USBHubPort *port;
USBDevice *dev;
if (n >= s->nb_ports)
goto fail;
port = &s->ports[n];
dev = port->port.dev;
switch(value) {
case PORT_SUSPEND:
port->wPortStatus |= PORT_STAT_SUSPEND;
break;
case PORT_RESET:
if (dev) {
dev->handle_packet(dev,
USB_MSG_RESET, 0, 0, NULL, 0);
port->wPortChange |= PORT_STAT_C_RESET;
/* set enable bit */
port->wPortChange |= PORT_STAT_C_ENABLE;
port->wPortStatus |= PORT_STAT_ENABLE;
}
break;
case PORT_POWER:
break;
default:
goto fail;
}
ret = 0;
}
break;
case ClearPortFeature:
{
unsigned int n = index - 1;
USBHubPort *port;
USBDevice *dev;
if (n >= s->nb_ports)
goto fail;
port = &s->ports[n];
dev = port->port.dev;
switch(value) {
case PORT_ENABLE:
port->wPortStatus &= ~PORT_STAT_ENABLE;
break;
case PORT_C_ENABLE:
port->wPortChange &= ~PORT_STAT_C_ENABLE;
break;
case PORT_SUSPEND:
port->wPortStatus &= ~PORT_STAT_SUSPEND;
break;
case PORT_C_SUSPEND:
port->wPortChange &= ~PORT_STAT_C_SUSPEND;
break;
case PORT_C_CONNECTION:
port->wPortChange &= ~PORT_STAT_C_CONNECTION;
break;
case PORT_C_OVERCURRENT:
port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
break;
case PORT_C_RESET:
port->wPortChange &= ~PORT_STAT_C_RESET;
break;
default:
goto fail;
}
ret = 0;
}
break;
case GetHubDescriptor:
memcpy(data, qemu_hub_hub_descriptor,
sizeof(qemu_hub_hub_descriptor));
data[2] = s->nb_ports;
ret = sizeof(qemu_hub_hub_descriptor);
break;
default:
fail:
ret = USB_RET_STALL;
break;
}
return ret;
}
static int usb_hub_handle_data(USBDevice *dev, int pid,
uint8_t devep, uint8_t *data, int len)
{
USBHubState *s = (USBHubState *)dev;
int ret;
switch(pid) {
case USB_TOKEN_IN:
if (devep == 1) {
USBHubPort *port;
unsigned int status;
int i, n;
n = (s->nb_ports + 1 + 7) / 8;
if (n > len)
return USB_RET_BABBLE;
status = 0;
for(i = 0; i < s->nb_ports; i++) {
port = &s->ports[i];
if (port->wPortChange)
status |= (1 << (i + 1));
}
if (status != 0) {
for(i = 0; i < n; i++) {
data[i] = status >> (8 * i);
}
ret = n;
} else {
ret = 0;
}
} else {
goto fail;
}
break;
case USB_TOKEN_OUT:
default:
fail:
ret = USB_RET_STALL;
break;
}
return ret;
}
static int usb_hub_broadcast_packet(USBHubState *s, int pid,
uint8_t devaddr, uint8_t devep,
uint8_t *data, int len)
{
USBHubPort *port;
USBDevice *dev;
int i, ret;
for(i = 0; i < s->nb_ports; i++) {
port = &s->ports[i];
dev = port->port.dev;
if (dev && (port->wPortStatus & PORT_STAT_ENABLE)) {
ret = dev->handle_packet(dev, pid,
devaddr, devep,
data, len);
if (ret != USB_RET_NODEV) {
return ret;
}
}
}
return USB_RET_NODEV;
}
static int usb_hub_handle_packet(USBDevice *dev, int pid,
uint8_t devaddr, uint8_t devep,
uint8_t *data, int len)
{
USBHubState *s = (USBHubState *)dev;
#if defined(DEBUG) && 0
printf("usb_hub: pid=0x%x\n", pid);
#endif
if (dev->state == USB_STATE_DEFAULT &&
dev->addr != 0 &&
devaddr != dev->addr &&
(pid == USB_TOKEN_SETUP ||
pid == USB_TOKEN_OUT ||
pid == USB_TOKEN_IN)) {
/* broadcast the packet to the devices */
return usb_hub_broadcast_packet(s, pid, devaddr, devep, data, len);
}
return usb_generic_handle_packet(dev, pid, devaddr, devep, data, len);
}
USBDevice *usb_hub_init(USBPort **usb_ports, int nb_ports)
{
USBHubState *s;
USBHubPort *port;
int i;
if (nb_ports > MAX_PORTS)
return NULL;
s = qemu_mallocz(sizeof(USBHubState));
if (!s)
return NULL;
s->dev.speed = USB_SPEED_FULL;
s->dev.handle_packet = usb_hub_handle_packet;
/* generic USB device init */
s->dev.handle_reset = usb_hub_handle_reset;
s->dev.handle_control = usb_hub_handle_control;
s->dev.handle_data = usb_hub_handle_data;
s->nb_ports = nb_ports;
for(i = 0; i < s->nb_ports; i++) {
port = &s->ports[i];
port->wPortStatus = PORT_STAT_POWER;
port->wPortChange = 0;
port->port.attach = usb_hub_attach;
port->port.opaque = s;
port->port.index = i;
usb_ports[i] = &port->port;
}
return (USBDevice *)s;
}
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