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qemu/usb-linux.c
aliguori 376253ece4 monitor: Rework API (Jan Kiszka) 
Refactor the monitor API and prepare it for decoupled terminals:
term_print functions are renamed to monitor_* and all monitor services
gain a new parameter (mon) that will once refer to the monitor instance
the output is supposed to appear on. However, the argument remains
unused for now. All monitor command callbacks are also extended by a mon
parameter so that command handlers are able to pass an appropriate
reference to monitor output services.

For the case that monitor outputs so far happen without clearly
identifiable context, the global variable cur_mon is introduced that
shall once provide a pointer either to the current active monitor (while
processing commands) or to the default one. On the mid or long term,
those use case will be obsoleted so that this variable can be removed
again.

Due to the broad usage of the monitor interface, this patch mostly deals
with converting users of the monitor API. A few of them are already
extended to pass 'mon' from the command handler further down to internal
functions that invoke monitor_printf.

At this chance, monitor-related prototypes are moved from console.h to
a new monitor.h. The same is done for the readline API.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6711 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-05 23:01:23 +00:00

1690 lines
44 KiB
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/*
* Linux host USB redirector
*
* Copyright (c) 2005 Fabrice Bellard
*
* Copyright (c) 2008 Max Krasnyansky
* Support for host device auto connect & disconnect
* Major rewrite to support fully async operation
*
* Copyright 2008 TJ <linux@tjworld.net>
* Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
* to the legacy /proc/bus/usb USB device discovery and handling
*
* 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 "qemu-common.h"
#include "qemu-timer.h"
#include "monitor.h"
#include <dirent.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <linux/usbdevice_fs.h>
#include <linux/version.h>
#include "hw/usb.h"
/* We redefine it to avoid version problems */
struct usb_ctrltransfer {
uint8_t bRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
uint32_t timeout;
void *data;
};
struct usb_ctrlrequest {
uint8_t bRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
};
typedef int USBScanFunc(void *opaque, int bus_num, int addr, int class_id,
int vendor_id, int product_id,
const char *product_name, int speed);
static int usb_host_find_device(int *pbus_num, int *paddr,
char *product_name, int product_name_size,
const char *devname);
//#define DEBUG
#ifdef DEBUG
#define dprintf printf
#else
#define dprintf(...)
#endif
#define USBDBG_DEVOPENED "husb: opened %s/devices\n"
#define USBPROCBUS_PATH "/proc/bus/usb"
#define PRODUCT_NAME_SZ 32
#define MAX_ENDPOINTS 16
#define USBDEVBUS_PATH "/dev/bus/usb"
#define USBSYSBUS_PATH "/sys/bus/usb"
static char *usb_host_device_path;
#define USB_FS_NONE 0
#define USB_FS_PROC 1
#define USB_FS_DEV 2
#define USB_FS_SYS 3
static int usb_fs_type;
/* endpoint association data */
struct endp_data {
uint8_t type;
uint8_t halted;
};
enum {
CTRL_STATE_IDLE = 0,
CTRL_STATE_SETUP,
CTRL_STATE_DATA,
CTRL_STATE_ACK
};
/*
* Control transfer state.
* Note that 'buffer' _must_ follow 'req' field because
* we need contigious buffer when we submit control URB.
*/
struct ctrl_struct {
uint16_t len;
uint16_t offset;
uint8_t state;
struct usb_ctrlrequest req;
uint8_t buffer[1024];
};
typedef struct USBHostDevice {
USBDevice dev;
int fd;
uint8_t descr[1024];
int descr_len;
int configuration;
int ninterfaces;
int closing;
struct ctrl_struct ctrl;
struct endp_data endp_table[MAX_ENDPOINTS];
/* Host side address */
int bus_num;
int addr;
struct USBHostDevice *next;
} USBHostDevice;
static int is_isoc(USBHostDevice *s, int ep)
{
return s->endp_table[ep - 1].type == USBDEVFS_URB_TYPE_ISO;
}
static int is_halted(USBHostDevice *s, int ep)
{
return s->endp_table[ep - 1].halted;
}
static void clear_halt(USBHostDevice *s, int ep)
{
s->endp_table[ep - 1].halted = 0;
}
static void set_halt(USBHostDevice *s, int ep)
{
s->endp_table[ep - 1].halted = 1;
}
static USBHostDevice *hostdev_list;
static void hostdev_link(USBHostDevice *dev)
{
dev->next = hostdev_list;
hostdev_list = dev;
}
static void hostdev_unlink(USBHostDevice *dev)
{
USBHostDevice *pdev = hostdev_list;
USBHostDevice **prev = &hostdev_list;
while (pdev) {
if (pdev == dev) {
*prev = dev->next;
return;
}
prev = &pdev->next;
pdev = pdev->next;
}
}
static USBHostDevice *hostdev_find(int bus_num, int addr)
{
USBHostDevice *s = hostdev_list;
while (s) {
if (s->bus_num == bus_num && s->addr == addr)
return s;
s = s->next;
}
return NULL;
}
/*
* Async URB state.
* We always allocate one isoc descriptor even for bulk transfers
* to simplify allocation and casts.
*/
typedef struct AsyncURB
{
struct usbdevfs_urb urb;
struct usbdevfs_iso_packet_desc isocpd;
USBPacket *packet;
USBHostDevice *hdev;
} AsyncURB;
static AsyncURB *async_alloc(void)
{
return (AsyncURB *) qemu_mallocz(sizeof(AsyncURB));
}
static void async_free(AsyncURB *aurb)
{
qemu_free(aurb);
}
static void async_complete_ctrl(USBHostDevice *s, USBPacket *p)
{
switch(s->ctrl.state) {
case CTRL_STATE_SETUP:
if (p->len < s->ctrl.len)
s->ctrl.len = p->len;
s->ctrl.state = CTRL_STATE_DATA;
p->len = 8;
break;
case CTRL_STATE_ACK:
s->ctrl.state = CTRL_STATE_IDLE;
p->len = 0;
break;
default:
break;
}
}
static void async_complete(void *opaque)
{
USBHostDevice *s = opaque;
AsyncURB *aurb;
while (1) {
USBPacket *p;
int r = ioctl(s->fd, USBDEVFS_REAPURBNDELAY, &aurb);
if (r < 0) {
if (errno == EAGAIN)
return;
if (errno == ENODEV && !s->closing) {
printf("husb: device %d.%d disconnected\n", s->bus_num, s->addr);
usb_device_del_addr(0, s->dev.addr);
return;
}
dprintf("husb: async. reap urb failed errno %d\n", errno);
return;
}
p = aurb->packet;
dprintf("husb: async completed. aurb %p status %d alen %d\n",
aurb, aurb->urb.status, aurb->urb.actual_length);
if (p) {
switch (aurb->urb.status) {
case 0:
p->len = aurb->urb.actual_length;
if (aurb->urb.type == USBDEVFS_URB_TYPE_CONTROL)
async_complete_ctrl(s, p);
break;
case -EPIPE:
set_halt(s, p->devep);
/* fall through */
default:
p->len = USB_RET_NAK;
break;
}
usb_packet_complete(p);
}
async_free(aurb);
}
}
static void async_cancel(USBPacket *unused, void *opaque)
{
AsyncURB *aurb = opaque;
USBHostDevice *s = aurb->hdev;
dprintf("husb: async cancel. aurb %p\n", aurb);
/* Mark it as dead (see async_complete above) */
aurb->packet = NULL;
int r = ioctl(s->fd, USBDEVFS_DISCARDURB, aurb);
if (r < 0) {
dprintf("husb: async. discard urb failed errno %d\n", errno);
}
}
static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
{
int dev_descr_len, config_descr_len;
int interface, nb_interfaces, nb_configurations;
int ret, i;
if (configuration == 0) /* address state - ignore */
return 1;
dprintf("husb: claiming interfaces. config %d\n", configuration);
i = 0;
dev_descr_len = dev->descr[0];
if (dev_descr_len > dev->descr_len)
goto fail;
nb_configurations = dev->descr[17];
i += dev_descr_len;
while (i < dev->descr_len) {
dprintf("husb: i is %d, descr_len is %d, dl %d, dt %d\n", i, dev->descr_len,
dev->descr[i], dev->descr[i+1]);
if (dev->descr[i+1] != USB_DT_CONFIG) {
i += dev->descr[i];
continue;
}
config_descr_len = dev->descr[i];
printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
if (configuration < 0 || configuration == dev->descr[i + 5]) {
configuration = dev->descr[i + 5];
break;
}
i += config_descr_len;
}
if (i >= dev->descr_len) {
fprintf(stderr, "husb: update iface failed. no matching configuration\n");
goto fail;
}
nb_interfaces = dev->descr[i + 4];
#ifdef USBDEVFS_DISCONNECT
/* earlier Linux 2.4 do not support that */
{
struct usbdevfs_ioctl ctrl;
for (interface = 0; interface < nb_interfaces; interface++) {
ctrl.ioctl_code = USBDEVFS_DISCONNECT;
ctrl.ifno = interface;
ret = ioctl(dev->fd, USBDEVFS_IOCTL, &ctrl);
if (ret < 0 && errno != ENODATA) {
perror("USBDEVFS_DISCONNECT");
goto fail;
}
}
}
#endif
/* XXX: only grab if all interfaces are free */
for (interface = 0; interface < nb_interfaces; interface++) {
ret = ioctl(dev->fd, USBDEVFS_CLAIMINTERFACE, &interface);
if (ret < 0) {
if (errno == EBUSY) {
printf("husb: update iface. device already grabbed\n");
} else {
perror("husb: failed to claim interface");
}
fail:
return 0;
}
}
printf("husb: %d interfaces claimed for configuration %d\n",
nb_interfaces, configuration);
dev->ninterfaces = nb_interfaces;
dev->configuration = configuration;
return 1;
}
static int usb_host_release_interfaces(USBHostDevice *s)
{
int ret, i;
dprintf("husb: releasing interfaces\n");
for (i = 0; i < s->ninterfaces; i++) {
ret = ioctl(s->fd, USBDEVFS_RELEASEINTERFACE, &i);
if (ret < 0) {
perror("husb: failed to release interface");
return 0;
}
}
return 1;
}
static void usb_host_handle_reset(USBDevice *dev)
{
USBHostDevice *s = (USBHostDevice *) dev;
dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
ioctl(s->fd, USBDEVFS_RESET);
usb_host_claim_interfaces(s, s->configuration);
}
static void usb_host_handle_destroy(USBDevice *dev)
{
USBHostDevice *s = (USBHostDevice *)dev;
s->closing = 1;
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
hostdev_unlink(s);
async_complete(s);
if (s->fd >= 0)
close(s->fd);
qemu_free(s);
}
static int usb_linux_update_endp_table(USBHostDevice *s);
static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
{
struct usbdevfs_urb *urb;
AsyncURB *aurb;
int ret;
aurb = async_alloc();
aurb->hdev = s;
aurb->packet = p;
urb = &aurb->urb;
if (p->pid == USB_TOKEN_IN)
urb->endpoint = p->devep | 0x80;
else
urb->endpoint = p->devep;
if (is_halted(s, p->devep)) {
ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &urb->endpoint);
if (ret < 0) {
dprintf("husb: failed to clear halt. ep 0x%x errno %d\n",
urb->endpoint, errno);
return USB_RET_NAK;
}
clear_halt(s, p->devep);
}
urb->buffer = p->data;
urb->buffer_length = p->len;
if (is_isoc(s, p->devep)) {
/* Setup ISOC transfer */
urb->type = USBDEVFS_URB_TYPE_ISO;
urb->flags = USBDEVFS_URB_ISO_ASAP;
urb->number_of_packets = 1;
urb->iso_frame_desc[0].length = p->len;
} else {
/* Setup bulk transfer */
urb->type = USBDEVFS_URB_TYPE_BULK;
}
urb->usercontext = s;
ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
dprintf("husb: data submit. ep 0x%x len %u aurb %p\n", urb->endpoint, p->len, aurb);
if (ret < 0) {
dprintf("husb: submit failed. errno %d\n", errno);
async_free(aurb);
switch(errno) {
case ETIMEDOUT:
return USB_RET_NAK;
case EPIPE:
default:
return USB_RET_STALL;
}
}
usb_defer_packet(p, async_cancel, aurb);
return USB_RET_ASYNC;
}
static int ctrl_error(void)
{
if (errno == ETIMEDOUT)
return USB_RET_NAK;
else
return USB_RET_STALL;
}
static int usb_host_set_address(USBHostDevice *s, int addr)
{
dprintf("husb: ctrl set addr %u\n", addr);
s->dev.addr = addr;
return 0;
}
static int usb_host_set_config(USBHostDevice *s, int config)
{
usb_host_release_interfaces(s);
int ret = ioctl(s->fd, USBDEVFS_SETCONFIGURATION, &config);
dprintf("husb: ctrl set config %d ret %d errno %d\n", config, ret, errno);
if (ret < 0)
return ctrl_error();
usb_host_claim_interfaces(s, config);
return 0;
}
static int usb_host_set_interface(USBHostDevice *s, int iface, int alt)
{
struct usbdevfs_setinterface si;
int ret;
si.interface = iface;
si.altsetting = alt;
ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
dprintf("husb: ctrl set iface %d altset %d ret %d errno %d\n",
iface, alt, ret, errno);
if (ret < 0)
return ctrl_error();
usb_linux_update_endp_table(s);
return 0;
}
static int usb_host_handle_control(USBHostDevice *s, USBPacket *p)
{
struct usbdevfs_urb *urb;
AsyncURB *aurb;
int ret, value, index;
/*
* Process certain standard device requests.
* These are infrequent and are processed synchronously.
*/
value = le16_to_cpu(s->ctrl.req.wValue);
index = le16_to_cpu(s->ctrl.req.wIndex);
dprintf("husb: ctrl type 0x%x req 0x%x val 0x%x index %u len %u\n",
s->ctrl.req.bRequestType, s->ctrl.req.bRequest, value, index,
s->ctrl.len);
if (s->ctrl.req.bRequestType == 0) {
switch (s->ctrl.req.bRequest) {
case USB_REQ_SET_ADDRESS:
return usb_host_set_address(s, value);
case USB_REQ_SET_CONFIGURATION:
return usb_host_set_config(s, value & 0xff);
}
}
if (s->ctrl.req.bRequestType == 1 &&
s->ctrl.req.bRequest == USB_REQ_SET_INTERFACE)
return usb_host_set_interface(s, index, value);
/* The rest are asynchronous */
aurb = async_alloc();
aurb->hdev = s;
aurb->packet = p;
/*
* Setup ctrl transfer.
*
* s->ctrl is layed out such that data buffer immediately follows
* 'req' struct which is exactly what usbdevfs expects.
*/
urb = &aurb->urb;
urb->type = USBDEVFS_URB_TYPE_CONTROL;
urb->endpoint = p->devep;
urb->buffer = &s->ctrl.req;
urb->buffer_length = 8 + s->ctrl.len;
urb->usercontext = s;
ret = ioctl(s->fd, USBDEVFS_SUBMITURB, urb);
dprintf("husb: submit ctrl. len %u aurb %p\n", urb->buffer_length, aurb);
if (ret < 0) {
dprintf("husb: submit failed. errno %d\n", errno);
async_free(aurb);
switch(errno) {
case ETIMEDOUT:
return USB_RET_NAK;
case EPIPE:
default:
return USB_RET_STALL;
}
}
usb_defer_packet(p, async_cancel, aurb);
return USB_RET_ASYNC;
}
static int do_token_setup(USBDevice *dev, USBPacket *p)
{
USBHostDevice *s = (USBHostDevice *) dev;
int ret = 0;
if (p->len != 8)
return USB_RET_STALL;
memcpy(&s->ctrl.req, p->data, 8);
s->ctrl.len = le16_to_cpu(s->ctrl.req.wLength);
s->ctrl.offset = 0;
s->ctrl.state = CTRL_STATE_SETUP;
if (s->ctrl.req.bRequestType & USB_DIR_IN) {
ret = usb_host_handle_control(s, p);
if (ret < 0)
return ret;
if (ret < s->ctrl.len)
s->ctrl.len = ret;
s->ctrl.state = CTRL_STATE_DATA;
} else {
if (s->ctrl.len == 0)
s->ctrl.state = CTRL_STATE_ACK;
else
s->ctrl.state = CTRL_STATE_DATA;
}
return ret;
}
static int do_token_in(USBDevice *dev, USBPacket *p)
{
USBHostDevice *s = (USBHostDevice *) dev;
int ret = 0;
if (p->devep != 0)
return usb_host_handle_data(s, p);
switch(s->ctrl.state) {
case CTRL_STATE_ACK:
if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
ret = usb_host_handle_control(s, p);
if (ret == USB_RET_ASYNC)
return USB_RET_ASYNC;
s->ctrl.state = CTRL_STATE_IDLE;
return ret > 0 ? 0 : ret;
}
return 0;
case CTRL_STATE_DATA:
if (s->ctrl.req.bRequestType & USB_DIR_IN) {
int len = s->ctrl.len - s->ctrl.offset;
if (len > p->len)
len = p->len;
memcpy(p->data, s->ctrl.buffer + s->ctrl.offset, len);
s->ctrl.offset += len;
if (s->ctrl.offset >= s->ctrl.len)
s->ctrl.state = CTRL_STATE_ACK;
return len;
}
s->ctrl.state = CTRL_STATE_IDLE;
return USB_RET_STALL;
default:
return USB_RET_STALL;
}
}
static int do_token_out(USBDevice *dev, USBPacket *p)
{
USBHostDevice *s = (USBHostDevice *) dev;
if (p->devep != 0)
return usb_host_handle_data(s, p);
switch(s->ctrl.state) {
case CTRL_STATE_ACK:
if (s->ctrl.req.bRequestType & USB_DIR_IN) {
s->ctrl.state = CTRL_STATE_IDLE;
/* transfer OK */
} else {
/* ignore additional output */
}
return 0;
case CTRL_STATE_DATA:
if (!(s->ctrl.req.bRequestType & USB_DIR_IN)) {
int len = s->ctrl.len - s->ctrl.offset;
if (len > p->len)
len = p->len;
memcpy(s->ctrl.buffer + s->ctrl.offset, p->data, len);
s->ctrl.offset += len;
if (s->ctrl.offset >= s->ctrl.len)
s->ctrl.state = CTRL_STATE_ACK;
return len;
}
s->ctrl.state = CTRL_STATE_IDLE;
return USB_RET_STALL;
default:
return USB_RET_STALL;
}
}
/*
* Packet handler.
* Called by the HC (host controller).
*
* Returns length of the transaction or one of the USB_RET_XXX codes.
*/
static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
{
switch(p->pid) {
case USB_MSG_ATTACH:
s->state = USB_STATE_ATTACHED;
return 0;
case USB_MSG_DETACH:
s->state = USB_STATE_NOTATTACHED;
return 0;
case USB_MSG_RESET:
s->remote_wakeup = 0;
s->addr = 0;
s->state = USB_STATE_DEFAULT;
s->handle_reset(s);
return 0;
}
/* Rest of the PIDs must match our address */
if (s->state < USB_STATE_DEFAULT || p->devaddr != s->addr)
return USB_RET_NODEV;
switch (p->pid) {
case USB_TOKEN_SETUP:
return do_token_setup(s, p);
case USB_TOKEN_IN:
return do_token_in(s, p);
case USB_TOKEN_OUT:
return do_token_out(s, p);
default:
return USB_RET_STALL;
}
}
/* returns 1 on problem encountered or 0 for success */
static int usb_linux_update_endp_table(USBHostDevice *s)
{
uint8_t *descriptors;
uint8_t devep, type, configuration, alt_interface;
struct usb_ctrltransfer ct;
int interface, ret, length, i;
ct.bRequestType = USB_DIR_IN;
ct.bRequest = USB_REQ_GET_CONFIGURATION;
ct.wValue = 0;
ct.wIndex = 0;
ct.wLength = 1;
ct.data = &configuration;
ct.timeout = 50;
ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
if (ret < 0) {
perror("usb_linux_update_endp_table");
return 1;
}
/* in address state */
if (configuration == 0)
return 1;
/* get the desired configuration, interface, and endpoint descriptors
* from device description */
descriptors = &s->descr[18];
length = s->descr_len - 18;
i = 0;
if (descriptors[i + 1] != USB_DT_CONFIG ||
descriptors[i + 5] != configuration) {
dprintf("invalid descriptor data - configuration\n");
return 1;
}
i += descriptors[i];
while (i < length) {
if (descriptors[i + 1] != USB_DT_INTERFACE ||
(descriptors[i + 1] == USB_DT_INTERFACE &&
descriptors[i + 4] == 0)) {
i += descriptors[i];
continue;
}
interface = descriptors[i + 2];
ct.bRequestType = USB_DIR_IN | USB_RECIP_INTERFACE;
ct.bRequest = USB_REQ_GET_INTERFACE;
ct.wValue = 0;
ct.wIndex = interface;
ct.wLength = 1;
ct.data = &alt_interface;
ct.timeout = 50;
ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
if (ret < 0) {
perror("usb_linux_update_endp_table");
return 1;
}
/* the current interface descriptor is the active interface
* and has endpoints */
if (descriptors[i + 3] != alt_interface) {
i += descriptors[i];
continue;
}
/* advance to the endpoints */
while (i < length && descriptors[i +1] != USB_DT_ENDPOINT)
i += descriptors[i];
if (i >= length)
break;
while (i < length) {
if (descriptors[i + 1] != USB_DT_ENDPOINT)
break;
devep = descriptors[i + 2];
switch (descriptors[i + 3] & 0x3) {
case 0x00:
type = USBDEVFS_URB_TYPE_CONTROL;
break;
case 0x01:
type = USBDEVFS_URB_TYPE_ISO;
break;
case 0x02:
type = USBDEVFS_URB_TYPE_BULK;
break;
case 0x03:
type = USBDEVFS_URB_TYPE_INTERRUPT;
break;
default:
dprintf("usb_host: malformed endpoint type\n");
type = USBDEVFS_URB_TYPE_BULK;
}
s->endp_table[(devep & 0xf) - 1].type = type;
s->endp_table[(devep & 0xf) - 1].halted = 0;
i += descriptors[i];
}
}
return 0;
}
static USBDevice *usb_host_device_open_addr(int bus_num, int addr, const char *prod_name)
{
int fd = -1, ret;
USBHostDevice *dev = NULL;
struct usbdevfs_connectinfo ci;
char buf[1024];
dev = qemu_mallocz(sizeof(USBHostDevice));
dev->bus_num = bus_num;
dev->addr = addr;
printf("husb: open device %d.%d\n", bus_num, addr);
if (!usb_host_device_path) {
perror("husb: USB Host Device Path not set");
goto fail;
}
snprintf(buf, sizeof(buf), "%s/%03d/%03d", usb_host_device_path,
bus_num, addr);
fd = open(buf, O_RDWR | O_NONBLOCK);
if (fd < 0) {
perror(buf);
goto fail;
}
dprintf("husb: opened %s\n", buf);
/* read the device description */
dev->descr_len = read(fd, dev->descr, sizeof(dev->descr));
if (dev->descr_len <= 0) {
perror("husb: reading device data failed");
goto fail;
}
#ifdef DEBUG
{
int x;
printf("=== begin dumping device descriptor data ===\n");
for (x = 0; x < dev->descr_len; x++)
printf("%02x ", dev->descr[x]);
printf("\n=== end dumping device descriptor data ===\n");
}
#endif
dev->fd = fd;
/*
* Initial configuration is -1 which makes us claim first
* available config. We used to start with 1, which does not
* always work. I've seen devices where first config starts
* with 2.
*/
if (!usb_host_claim_interfaces(dev, -1))
goto fail;
ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
if (ret < 0) {
perror("usb_host_device_open: USBDEVFS_CONNECTINFO");
goto fail;
}
printf("husb: grabbed usb device %d.%d\n", bus_num, addr);
ret = usb_linux_update_endp_table(dev);
if (ret)
goto fail;
if (ci.slow)
dev->dev.speed = USB_SPEED_LOW;
else
dev->dev.speed = USB_SPEED_HIGH;
dev->dev.handle_packet = usb_host_handle_packet;
dev->dev.handle_reset = usb_host_handle_reset;
dev->dev.handle_destroy = usb_host_handle_destroy;
if (!prod_name || prod_name[0] == '\0')
snprintf(dev->dev.devname, sizeof(dev->dev.devname),
"host:%d.%d", bus_num, addr);
else
pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
prod_name);
/* USB devio uses 'write' flag to check for async completions */
qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
hostdev_link(dev);
return (USBDevice *) dev;
fail:
if (dev)
qemu_free(dev);
close(fd);
return NULL;
}
static int usb_host_auto_add(const char *spec);
static int usb_host_auto_del(const char *spec);
USBDevice *usb_host_device_open(const char *devname)
{
Monitor *mon = cur_mon;
int bus_num, addr;
char product_name[PRODUCT_NAME_SZ];
if (strstr(devname, "auto:")) {
usb_host_auto_add(devname);
return NULL;
}
if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
devname) < 0)
return NULL;
if (hostdev_find(bus_num, addr)) {
monitor_printf(mon, "husb: host usb device %d.%d is already open\n",
bus_num, addr);
return NULL;
}
return usb_host_device_open_addr(bus_num, addr, product_name);
}
int usb_host_device_close(const char *devname)
{
char product_name[PRODUCT_NAME_SZ];
int bus_num, addr;
USBHostDevice *s;
if (strstr(devname, "auto:"))
return usb_host_auto_del(devname);
if (usb_host_find_device(&bus_num, &addr, product_name, sizeof(product_name),
devname) < 0)
return -1;
s = hostdev_find(bus_num, addr);
if (s) {
usb_device_del_addr(0, s->dev.addr);
return 0;
}
return -1;
}
static int get_tag_value(char *buf, int buf_size,
const char *str, const char *tag,
const char *stopchars)
{
const char *p;
char *q;
p = strstr(str, tag);
if (!p)
return -1;
p += strlen(tag);
while (qemu_isspace(*p))
p++;
q = buf;
while (*p != '\0' && !strchr(stopchars, *p)) {
if ((q - buf) < (buf_size - 1))
*q++ = *p;
p++;
}
*q = '\0';
return q - buf;
}
/*
* Use /proc/bus/usb/devices or /dev/bus/usb/devices file to determine
* host's USB devices. This is legacy support since many distributions
* are moving to /sys/bus/usb
*/
static int usb_host_scan_dev(void *opaque, USBScanFunc *func)
{
FILE *f = 0;
char line[1024];
char buf[1024];
int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
char product_name[512];
int ret = 0;
if (!usb_host_device_path) {
perror("husb: USB Host Device Path not set");
goto the_end;
}
snprintf(line, sizeof(line), "%s/devices", usb_host_device_path);
f = fopen(line, "r");
if (!f) {
perror("husb: cannot open devices file");
goto the_end;
}
device_count = 0;
bus_num = addr = speed = class_id = product_id = vendor_id = 0;
for(;;) {
if (fgets(line, sizeof(line), f) == NULL)
break;
if (strlen(line) > 0)
line[strlen(line) - 1] = '\0';
if (line[0] == 'T' && line[1] == ':') {
if (device_count && (vendor_id || product_id)) {
/* New device. Add the previously discovered device. */
ret = func(opaque, bus_num, addr, class_id, vendor_id,
product_id, product_name, speed);
if (ret)
goto the_end;
}
if (get_tag_value(buf, sizeof(buf), line, "Bus=", " ") < 0)
goto fail;
bus_num = atoi(buf);
if (get_tag_value(buf, sizeof(buf), line, "Dev#=", " ") < 0)
goto fail;
addr = atoi(buf);
if (get_tag_value(buf, sizeof(buf), line, "Spd=", " ") < 0)
goto fail;
if (!strcmp(buf, "480"))
speed = USB_SPEED_HIGH;
else if (!strcmp(buf, "1.5"))
speed = USB_SPEED_LOW;
else
speed = USB_SPEED_FULL;
product_name[0] = '\0';
class_id = 0xff;
device_count++;
product_id = 0;
vendor_id = 0;
} else if (line[0] == 'P' && line[1] == ':') {
if (get_tag_value(buf, sizeof(buf), line, "Vendor=", " ") < 0)
goto fail;
vendor_id = strtoul(buf, NULL, 16);
if (get_tag_value(buf, sizeof(buf), line, "ProdID=", " ") < 0)
goto fail;
product_id = strtoul(buf, NULL, 16);
} else if (line[0] == 'S' && line[1] == ':') {
if (get_tag_value(buf, sizeof(buf), line, "Product=", "") < 0)
goto fail;
pstrcpy(product_name, sizeof(product_name), buf);
} else if (line[0] == 'D' && line[1] == ':') {
if (get_tag_value(buf, sizeof(buf), line, "Cls=", " (") < 0)
goto fail;
class_id = strtoul(buf, NULL, 16);
}
fail: ;
}
if (device_count && (vendor_id || product_id)) {
/* Add the last device. */
ret = func(opaque, bus_num, addr, class_id, vendor_id,
product_id, product_name, speed);
}
the_end:
if (f)
fclose(f);
return ret;
}
/*
* Read sys file-system device file
*
* @line address of buffer to put file contents in
* @line_size size of line
* @device_file path to device file (printf format string)
* @device_name device being opened (inserted into device_file)
*
* @return 0 failed, 1 succeeded ('line' contains data)
*/
static int usb_host_read_file(char *line, size_t line_size, const char *device_file, const char *device_name)
{
Monitor *mon = cur_mon;
FILE *f;
int ret = 0;
char filename[PATH_MAX];
snprintf(filename, PATH_MAX, USBSYSBUS_PATH "/devices/%s/%s", device_name,
device_file);
f = fopen(filename, "r");
if (f) {
fgets(line, line_size, f);
fclose(f);
ret = 1;
} else {
monitor_printf(mon, "husb: could not open %s\n", filename);
}
return ret;
}
/*
* Use /sys/bus/usb/devices/ directory to determine host's USB
* devices.
*
* This code is based on Robert Schiele's original patches posted to
* the Novell bug-tracker https://bugzilla.novell.com/show_bug.cgi?id=241950
*/
static int usb_host_scan_sys(void *opaque, USBScanFunc *func)
{
DIR *dir = 0;
char line[1024];
int bus_num, addr, speed, class_id, product_id, vendor_id;
int ret = 0;
char product_name[512];
struct dirent *de;
dir = opendir(USBSYSBUS_PATH "/devices");
if (!dir) {
perror("husb: cannot open devices directory");
goto the_end;
}
while ((de = readdir(dir))) {
if (de->d_name[0] != '.' && !strchr(de->d_name, ':')) {
char *tmpstr = de->d_name;
if (!strncmp(de->d_name, "usb", 3))
tmpstr += 3;
bus_num = atoi(tmpstr);
if (!usb_host_read_file(line, sizeof(line), "devnum", de->d_name))
goto the_end;
if (sscanf(line, "%d", &addr) != 1)
goto the_end;
if (!usb_host_read_file(line, sizeof(line), "bDeviceClass",
de->d_name))
goto the_end;
if (sscanf(line, "%x", &class_id) != 1)
goto the_end;
if (!usb_host_read_file(line, sizeof(line), "idVendor", de->d_name))
goto the_end;
if (sscanf(line, "%x", &vendor_id) != 1)
goto the_end;
if (!usb_host_read_file(line, sizeof(line), "idProduct",
de->d_name))
goto the_end;
if (sscanf(line, "%x", &product_id) != 1)
goto the_end;
if (!usb_host_read_file(line, sizeof(line), "product",
de->d_name)) {
*product_name = 0;
} else {
if (strlen(line) > 0)
line[strlen(line) - 1] = '\0';
pstrcpy(product_name, sizeof(product_name), line);
}
if (!usb_host_read_file(line, sizeof(line), "speed", de->d_name))
goto the_end;
if (!strcmp(line, "480\n"))
speed = USB_SPEED_HIGH;
else if (!strcmp(line, "1.5\n"))
speed = USB_SPEED_LOW;
else
speed = USB_SPEED_FULL;
ret = func(opaque, bus_num, addr, class_id, vendor_id,
product_id, product_name, speed);
if (ret)
goto the_end;
}
}
the_end:
if (dir)
closedir(dir);
return ret;
}
/*
* Determine how to access the host's USB devices and call the
* specific support function.
*/
static int usb_host_scan(void *opaque, USBScanFunc *func)
{
Monitor *mon = cur_mon;
FILE *f = 0;
DIR *dir = 0;
int ret = 0;
const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
char devpath[PATH_MAX];
/* only check the host once */
if (!usb_fs_type) {
f = fopen(USBPROCBUS_PATH "/devices", "r");
if (f) {
/* devices found in /proc/bus/usb/ */
strcpy(devpath, USBPROCBUS_PATH);
usb_fs_type = USB_FS_PROC;
fclose(f);
dprintf(USBDBG_DEVOPENED, USBPROCBUS_PATH);
goto found_devices;
}
/* try additional methods if an access method hasn't been found yet */
f = fopen(USBDEVBUS_PATH "/devices", "r");
if (f) {
/* devices found in /dev/bus/usb/ */
strcpy(devpath, USBDEVBUS_PATH);
usb_fs_type = USB_FS_DEV;
fclose(f);
dprintf(USBDBG_DEVOPENED, USBDEVBUS_PATH);
goto found_devices;
}
dir = opendir(USBSYSBUS_PATH "/devices");
if (dir) {
/* devices found in /dev/bus/usb/ (yes - not a mistake!) */
strcpy(devpath, USBDEVBUS_PATH);
usb_fs_type = USB_FS_SYS;
closedir(dir);
dprintf(USBDBG_DEVOPENED, USBSYSBUS_PATH);
goto found_devices;
}
found_devices:
if (!usb_fs_type) {
monitor_printf(mon, "husb: unable to access USB devices\n");
return -ENOENT;
}
/* the module setting (used later for opening devices) */
usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
strcpy(usb_host_device_path, devpath);
monitor_printf(mon, "husb: using %s file-system with %s\n",
fs_type[usb_fs_type], usb_host_device_path);
}
switch (usb_fs_type) {
case USB_FS_PROC:
case USB_FS_DEV:
ret = usb_host_scan_dev(opaque, func);
break;
case USB_FS_SYS:
ret = usb_host_scan_sys(opaque, func);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
struct USBAutoFilter {
struct USBAutoFilter *next;
int bus_num;
int addr;
int vendor_id;
int product_id;
};
static QEMUTimer *usb_auto_timer;
static struct USBAutoFilter *usb_auto_filter;
static int usb_host_auto_scan(void *opaque, int bus_num, int addr,
int class_id, int vendor_id, int product_id,
const char *product_name, int speed)
{
struct USBAutoFilter *f;
struct USBDevice *dev;
/* Ignore hubs */
if (class_id == 9)
return 0;
for (f = usb_auto_filter; f; f = f->next) {
if (f->bus_num >= 0 && f->bus_num != bus_num)
continue;
if (f->addr >= 0 && f->addr != addr)
continue;
if (f->vendor_id >= 0 && f->vendor_id != vendor_id)
continue;
if (f->product_id >= 0 && f->product_id != product_id)
continue;
/* We got a match */
/* Allredy attached ? */
if (hostdev_find(bus_num, addr))
return 0;
dprintf("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
dev = usb_host_device_open_addr(bus_num, addr, product_name);
if (dev)
usb_device_add_dev(dev);
}
return 0;
}
static void usb_host_auto_timer(void *unused)
{
usb_host_scan(NULL, usb_host_auto_scan);
qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
}
/*
* Autoconnect filter
* Format:
* auto:bus:dev[:vid:pid]
* auto:bus.dev[:vid:pid]
*
* bus - bus number (dec, * means any)
* dev - device number (dec, * means any)
* vid - vendor id (hex, * means any)
* pid - product id (hex, * means any)
*
* See 'lsusb' output.
*/
static int parse_filter(const char *spec, struct USBAutoFilter *f)
{
enum { BUS, DEV, VID, PID, DONE };
const char *p = spec;
int i;
f->bus_num = -1;
f->addr = -1;
f->vendor_id = -1;
f->product_id = -1;
for (i = BUS; i < DONE; i++) {
p = strpbrk(p, ":.");
if (!p) break;
p++;
if (*p == '*')
continue;
switch(i) {
case BUS: f->bus_num = strtol(p, NULL, 10); break;
case DEV: f->addr = strtol(p, NULL, 10); break;
case VID: f->vendor_id = strtol(p, NULL, 16); break;
case PID: f->product_id = strtol(p, NULL, 16); break;
}
}
if (i < DEV) {
fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
return -1;
}
return 0;
}
static int match_filter(const struct USBAutoFilter *f1,
const struct USBAutoFilter *f2)
{
return f1->bus_num == f2->bus_num &&
f1->addr == f2->addr &&
f1->vendor_id == f2->vendor_id &&
f1->product_id == f2->product_id;
}
static int usb_host_auto_add(const char *spec)
{
struct USBAutoFilter filter, *f;
if (parse_filter(spec, &filter) < 0)
return -1;
f = qemu_mallocz(sizeof(*f));
*f = filter;
if (!usb_auto_filter) {
/*
* First entry. Init and start the monitor.
* Right now we're using timer to check for new devices.
* If this turns out to be too expensive we can move that into a
* separate thread.
*/
usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
if (!usb_auto_timer) {
fprintf(stderr, "husb: failed to allocate auto scan timer\n");
qemu_free(f);
return -1;
}
/* Check for new devices every two seconds */
qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
}
dprintf("husb: added auto filter: bus_num %d addr %d vid %d pid %d\n",
f->bus_num, f->addr, f->vendor_id, f->product_id);
f->next = usb_auto_filter;
usb_auto_filter = f;
return 0;
}
static int usb_host_auto_del(const char *spec)
{
struct USBAutoFilter *pf = usb_auto_filter;
struct USBAutoFilter **prev = &usb_auto_filter;
struct USBAutoFilter filter;
if (parse_filter(spec, &filter) < 0)
return -1;
while (pf) {
if (match_filter(pf, &filter)) {
dprintf("husb: removed auto filter: bus_num %d addr %d vid %d pid %d\n",
pf->bus_num, pf->addr, pf->vendor_id, pf->product_id);
*prev = pf->next;
if (!usb_auto_filter) {
/* No more filters. Stop scanning. */
qemu_del_timer(usb_auto_timer);
qemu_free_timer(usb_auto_timer);
}
return 0;
}
prev = &pf->next;
pf = pf->next;
}
return -1;
}
typedef struct FindDeviceState {
int vendor_id;
int product_id;
int bus_num;
int addr;
char product_name[PRODUCT_NAME_SZ];
} FindDeviceState;
static int usb_host_find_device_scan(void *opaque, int bus_num, int addr,
int class_id,
int vendor_id, int product_id,
const char *product_name, int speed)
{
FindDeviceState *s = opaque;
if ((vendor_id == s->vendor_id &&
product_id == s->product_id) ||
(bus_num == s->bus_num &&
addr == s->addr)) {
pstrcpy(s->product_name, PRODUCT_NAME_SZ, product_name);
s->bus_num = bus_num;
s->addr = addr;
return 1;
} else {
return 0;
}
}
/* the syntax is :
'bus.addr' (decimal numbers) or
'vendor_id:product_id' (hexa numbers) */
static int usb_host_find_device(int *pbus_num, int *paddr,
char *product_name, int product_name_size,
const char *devname)
{
const char *p;
int ret;
FindDeviceState fs;
p = strchr(devname, '.');
if (p) {
*pbus_num = strtoul(devname, NULL, 0);
*paddr = strtoul(p + 1, NULL, 0);
fs.bus_num = *pbus_num;
fs.addr = *paddr;
ret = usb_host_scan(&fs, usb_host_find_device_scan);
if (ret)
pstrcpy(product_name, product_name_size, fs.product_name);
return 0;
}
p = strchr(devname, ':');
if (p) {
fs.vendor_id = strtoul(devname, NULL, 16);
fs.product_id = strtoul(p + 1, NULL, 16);
ret = usb_host_scan(&fs, usb_host_find_device_scan);
if (ret) {
*pbus_num = fs.bus_num;
*paddr = fs.addr;
pstrcpy(product_name, product_name_size, fs.product_name);
return 0;
}
}
return -1;
}
/**********************/
/* USB host device info */
struct usb_class_info {
int class;
const char *class_name;
};
static const struct usb_class_info usb_class_info[] = {
{ USB_CLASS_AUDIO, "Audio"},
{ USB_CLASS_COMM, "Communication"},
{ USB_CLASS_HID, "HID"},
{ USB_CLASS_HUB, "Hub" },
{ USB_CLASS_PHYSICAL, "Physical" },
{ USB_CLASS_PRINTER, "Printer" },
{ USB_CLASS_MASS_STORAGE, "Storage" },
{ USB_CLASS_CDC_DATA, "Data" },
{ USB_CLASS_APP_SPEC, "Application Specific" },
{ USB_CLASS_VENDOR_SPEC, "Vendor Specific" },
{ USB_CLASS_STILL_IMAGE, "Still Image" },
{ USB_CLASS_CSCID, "Smart Card" },
{ USB_CLASS_CONTENT_SEC, "Content Security" },
{ -1, NULL }
};
static const char *usb_class_str(uint8_t class)
{
const struct usb_class_info *p;
for(p = usb_class_info; p->class != -1; p++) {
if (p->class == class)
break;
}
return p->class_name;
}
static void usb_info_device(int bus_num, int addr, int class_id,
int vendor_id, int product_id,
const char *product_name,
int speed)
{
Monitor *mon = cur_mon;
const char *class_str, *speed_str;
switch(speed) {
case USB_SPEED_LOW:
speed_str = "1.5";
break;
case USB_SPEED_FULL:
speed_str = "12";
break;
case USB_SPEED_HIGH:
speed_str = "480";
break;
default:
speed_str = "?";
break;
}
monitor_printf(mon, " Device %d.%d, speed %s Mb/s\n",
bus_num, addr, speed_str);
class_str = usb_class_str(class_id);
if (class_str)
monitor_printf(mon, " %s:", class_str);
else
monitor_printf(mon, " Class %02x:", class_id);
monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
if (product_name[0] != '\0')
monitor_printf(mon, ", %s", product_name);
monitor_printf(mon, "\n");
}
static int usb_host_info_device(void *opaque, int bus_num, int addr,
int class_id,
int vendor_id, int product_id,
const char *product_name,
int speed)
{
usb_info_device(bus_num, addr, class_id, vendor_id, product_id,
product_name, speed);
return 0;
}
static void dec2str(int val, char *str, size_t size)
{
if (val == -1)
snprintf(str, size, "*");
else
snprintf(str, size, "%d", val);
}
static void hex2str(int val, char *str, size_t size)
{
if (val == -1)
snprintf(str, size, "*");
else
snprintf(str, size, "%x", val);
}
void usb_host_info(Monitor *mon)
{
struct USBAutoFilter *f;
usb_host_scan(NULL, usb_host_info_device);
if (usb_auto_filter)
monitor_printf(mon, " Auto filters:\n");
for (f = usb_auto_filter; f; f = f->next) {
char bus[10], addr[10], vid[10], pid[10];
dec2str(f->bus_num, bus, sizeof(bus));
dec2str(f->addr, addr, sizeof(addr));
hex2str(f->vendor_id, vid, sizeof(vid));
hex2str(f->product_id, pid, sizeof(pid));
monitor_printf(mon, " Device %s.%s ID %s:%s\n",
bus, addr, vid, pid);
}
}
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