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qemu-patch-raspberry4/usb-linux.c
Hans de Goede 060dc841d1 usb-linux: Add support for buffering iso usb packets 
Currently we are submitting iso packets to the host one at a time, as we
receive them from the emulated host controller. This has 2 problems:
1) If we were fast enough to submit every packet in time for the next host host
controller usb frame, we would be generating 1000 hardware interrupts per
second on the host
2) We are not fast enough to submit every packet in time for the next host host
controller usb frame, causing us to not submit iso urbs in some usb frames
which causes devices with an endpoint with an interval of 1 ms (so every
frame) to loose data. This causes for example ubs-1.1 webcams to not work
properly (usb-2.0 is not supported at all atm).

This patch fixes both problems by changing the iso packet pass through handling
to buffer packets. This version only does so for iso input packets (webcams,
audio in) I'm working on a second patch extending this to iso output packets
(audio out).

This patch makes use of the linux batching of iso packets in one urb.
When an iso in packet gets received from the emulated host controller,
it immediately submits 3 urbs with 32 iso in packets each. This causes
the host to only get an hw interrupt every 32 packets dropping the
interrupt rate to 32 interrupts per second and gives it a queue of urbs
to work from once the first 32 iso in packets have been received to make sure
no packets are dropped.

Besides submitting a whole bunch or urbs as soon as the first urb is
received, effectively creating a buffer inside the kernel, this patch also
gets rid of the asynchroneous completion for iso in urbs. Instead they are
only marked as complete in the fd write callback (which usbfs uses to signal
complete urbs). These complete packets then get consumed by returning them
synchroneously to the emulated host controller when it submits an iso in
packet for the ep in question. When no complete packets are ready (which
happens when the stream is starting) a 0 length packet gets returned to
the emulated host controller.

With this patch I've several usb-1.1 webcams working well with usb pass
through, where as without this patch none of them work.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2011-05-04 12:25:24 +02:00

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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 "sysemu.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 devpath,
int class_id, int vendor_id, int product_id,
const char *product_name, int speed);
//#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 */
#define ISO_FRAME_DESC_PER_URB 32
#define ISO_URB_COUNT 3
typedef struct AsyncURB AsyncURB;
struct endp_data {
uint8_t type;
uint8_t halted;
AsyncURB *iso_urb;
int iso_urb_idx;
int max_packet_size;
};
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 contiguous 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[8192];
};
struct USBAutoFilter {
uint32_t bus_num;
uint32_t addr;
uint32_t vendor_id;
uint32_t product_id;
};
typedef struct USBHostDevice {
USBDevice dev;
int fd;
uint8_t descr[1024];
int descr_len;
int configuration;
int ninterfaces;
int closing;
Notifier exit;
struct ctrl_struct ctrl;
struct endp_data endp_table[MAX_ENDPOINTS];
/* Host side address */
int bus_num;
int addr;
int devpath;
struct USBAutoFilter match;
QTAILQ_ENTRY(USBHostDevice) next;
} USBHostDevice;
static QTAILQ_HEAD(, USBHostDevice) hostdevs = QTAILQ_HEAD_INITIALIZER(hostdevs);
static int usb_host_close(USBHostDevice *dev);
static int parse_filter(const char *spec, struct USBAutoFilter *f);
static void usb_host_auto_check(void *unused);
static int usb_host_read_file(char *line, size_t line_size,
const char *device_file, const char *device_name);
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 void set_iso_urb(USBHostDevice *s, int ep, AsyncURB *iso_urb)
{
s->endp_table[ep - 1].iso_urb = iso_urb;
}
static AsyncURB *get_iso_urb(USBHostDevice *s, int ep)
{
return s->endp_table[ep - 1].iso_urb;
}
static void set_iso_urb_idx(USBHostDevice *s, int ep, int i)
{
s->endp_table[ep - 1].iso_urb_idx = i;
}
static int get_iso_urb_idx(USBHostDevice *s, int ep)
{
return s->endp_table[ep - 1].iso_urb_idx;
}
static int get_max_packet_size(USBHostDevice *s, int ep)
{
return s->endp_table[ep - 1].max_packet_size;
}
/*
* Async URB state.
* We always allocate iso packet descriptors even for bulk transfers
* to simplify allocation and casts.
*/
struct AsyncURB
{
struct usbdevfs_urb urb;
struct usbdevfs_iso_packet_desc isocpd[ISO_FRAME_DESC_PER_URB];
/* For regular async urbs */
USBPacket *packet;
USBHostDevice *hdev;
/* For buffered iso handling */
int iso_frame_idx; /* -1 means in flight */
};
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_host_close(s);
usb_host_auto_check(NULL);
return;
}
DPRINTF("husb: async. reap urb failed errno %d\n", errno);
return;
}
DPRINTF("husb: async completed. aurb %p status %d alen %d\n",
aurb, aurb->urb.status, aurb->urb.actual_length);
/* If this is a buffered iso urb mark it as complete and don't do
anything else (it is handled further in usb_host_handle_iso_data) */
if (aurb->iso_frame_idx == -1) {
if (aurb->urb.status == -EPIPE) {
set_halt(s, aurb->urb.endpoint & 0xf);
}
aurb->iso_frame_idx = 0;
continue;
}
p = aurb->packet;
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);
p->len = USB_RET_STALL;
break;
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;
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;
}
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;
ctrl.data = 0;
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 = DO_UPCAST(USBHostDevice, dev, 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;
usb_host_close(s);
QTAILQ_REMOVE(&hostdevs, s, next);
qemu_remove_exit_notifier(&s->exit);
}
static int usb_linux_update_endp_table(USBHostDevice *s);
/* iso data is special, we need to keep enough urbs in flight to make sure
that the controller never runs out of them, otherwise the device will
likely suffer a buffer underrun / overrun. */
static AsyncURB *usb_host_alloc_iso(USBHostDevice *s, uint8_t ep, int in)
{
AsyncURB *aurb;
int i, j, len = get_max_packet_size(s, ep);
aurb = qemu_mallocz(ISO_URB_COUNT * sizeof(*aurb));
for (i = 0; i < ISO_URB_COUNT; i++) {
aurb[i].urb.endpoint = ep;
aurb[i].urb.buffer_length = ISO_FRAME_DESC_PER_URB * len;
aurb[i].urb.buffer = qemu_malloc(aurb[i].urb.buffer_length);
aurb[i].urb.type = USBDEVFS_URB_TYPE_ISO;
aurb[i].urb.flags = USBDEVFS_URB_ISO_ASAP;
aurb[i].urb.number_of_packets = ISO_FRAME_DESC_PER_URB;
for (j = 0 ; j < ISO_FRAME_DESC_PER_URB; j++)
aurb[i].urb.iso_frame_desc[j].length = len;
if (in) {
aurb[i].urb.endpoint |= 0x80;
/* Mark as fully consumed (idle) */
aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB;
}
}
set_iso_urb(s, ep, aurb);
return aurb;
}
static void usb_host_stop_n_free_iso(USBHostDevice *s, uint8_t ep)
{
AsyncURB *aurb;
int i, ret, killed = 0, free = 1;
aurb = get_iso_urb(s, ep);
if (!aurb) {
return;
}
for (i = 0; i < ISO_URB_COUNT; i++) {
/* in flight? */
if (aurb[i].iso_frame_idx == -1) {
ret = ioctl(s->fd, USBDEVFS_DISCARDURB, &aurb[i]);
if (ret < 0) {
printf("husb: discard isoc in urb failed errno %d\n", errno);
free = 0;
continue;
}
killed++;
}
}
/* Make sure any urbs we've killed are reaped before we free them */
if (killed) {
async_complete(s);
}
for (i = 0; i < ISO_URB_COUNT; i++) {
qemu_free(aurb[i].urb.buffer);
}
if (free)
qemu_free(aurb);
else
printf("husb: leaking iso urbs because of discard failure\n");
set_iso_urb(s, ep, NULL);
}
static int urb_status_to_usb_ret(int status)
{
switch (status) {
case -EPIPE:
return USB_RET_STALL;
default:
return USB_RET_NAK;
}
}
static int usb_host_handle_iso_data(USBHostDevice *s, USBPacket *p)
{
AsyncURB *aurb;
int i, j, ret, len = 0;
aurb = get_iso_urb(s, p->devep);
if (!aurb) {
aurb = usb_host_alloc_iso(s, p->devep, 1);
}
i = get_iso_urb_idx(s, p->devep);
j = aurb[i].iso_frame_idx;
if (j >= 0 && j < ISO_FRAME_DESC_PER_URB) {
/* Check urb status */
if (aurb[i].urb.status) {
len = urb_status_to_usb_ret(aurb[i].urb.status);
/* Move to the next urb */
aurb[i].iso_frame_idx = ISO_FRAME_DESC_PER_URB - 1;
/* Check frame status */
} else if (aurb[i].urb.iso_frame_desc[j].status) {
len = urb_status_to_usb_ret(aurb[i].urb.iso_frame_desc[j].status);
/* Check the frame fits */
} else if (aurb[i].urb.iso_frame_desc[j].actual_length > p->len) {
printf("husb: error received isoc data is larger then packet\n");
len = USB_RET_NAK;
/* All good copy data over */
} else {
len = aurb[i].urb.iso_frame_desc[j].actual_length;
memcpy(p->data,
aurb[i].urb.buffer +
j * aurb[i].urb.iso_frame_desc[0].length,
len);
}
aurb[i].iso_frame_idx++;
if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
i = (i + 1) % ISO_URB_COUNT;
set_iso_urb_idx(s, p->devep, i);
}
}
/* (Re)-submit all fully consumed urbs */
for (i = 0; i < ISO_URB_COUNT; i++) {
if (aurb[i].iso_frame_idx == ISO_FRAME_DESC_PER_URB) {
ret = ioctl(s->fd, USBDEVFS_SUBMITURB, &aurb[i]);
if (ret < 0) {
printf("husb error submitting isoc urb %d: %d\n", i, errno);
if (len == 0) {
switch(errno) {
case ETIMEDOUT:
len = USB_RET_NAK;
case EPIPE:
default:
len = USB_RET_STALL;
}
}
break;
}
aurb[i].iso_frame_idx = -1;
}
}
return len;
}
static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
{
struct usbdevfs_urb *urb;
AsyncURB *aurb;
int ret;
uint8_t ep;
if (p->pid == USB_TOKEN_IN) {
ep = p->devep | 0x80;
} else {
ep = p->devep;
}
if (is_halted(s, p->devep)) {
ret = ioctl(s->fd, USBDEVFS_CLEAR_HALT, &ep);
if (ret < 0) {
DPRINTF("husb: failed to clear halt. ep 0x%x errno %d\n",
ep, errno);
return USB_RET_NAK;
}
clear_halt(s, p->devep);
}
if (is_isoc(s, p->devep) && p->pid == USB_TOKEN_IN)
return usb_host_handle_iso_data(s, p);
aurb = async_alloc();
aurb->hdev = s;
aurb->packet = p;
urb = &aurb->urb;
urb->endpoint = ep;
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 i, ret;
for (i = 1; i < MAX_ENDPOINTS; i++) {
if (is_isoc(s, i)) {
usb_host_stop_n_free_iso(s, i);
}
}
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;
int buffer_len;
/*
* 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 */
buffer_len = 8 + s->ctrl.len;
if (buffer_len > sizeof(s->ctrl.buffer)) {
fprintf(stderr, "husb: ctrl buffer too small (%u > %zu)\n",
buffer_len, sizeof(s->ctrl.buffer));
return USB_RET_STALL;
}
aurb = async_alloc();
aurb->hdev = s;
aurb->packet = p;
/*
* Setup ctrl transfer.
*
* s->ctrl is laid 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 = buffer_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->info->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;
}
}
static int usb_linux_get_configuration(USBHostDevice *s)
{
uint8_t configuration;
struct usb_ctrltransfer ct;
int ret;
if (usb_fs_type == USB_FS_SYS) {
char device_name[32], line[1024];
int configuration;
sprintf(device_name, "%d-%d", s->bus_num, s->devpath);
if (!usb_host_read_file(line, sizeof(line), "bConfigurationValue",
device_name)) {
goto usbdevfs;
}
if (sscanf(line, "%d", &configuration) != 1) {
goto usbdevfs;
}
return configuration;
}
usbdevfs:
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_get_configuration");
return -1;
}
/* in address state */
if (configuration == 0) {
return -1;
}
return configuration;
}
static uint8_t usb_linux_get_alt_setting(USBHostDevice *s,
uint8_t configuration, uint8_t interface)
{
uint8_t alt_setting;
struct usb_ctrltransfer ct;
int ret;
if (usb_fs_type == USB_FS_SYS) {
char device_name[64], line[1024];
int alt_setting;
sprintf(device_name, "%d-%d:%d.%d", s->bus_num, s->devpath,
(int)configuration, (int)interface);
if (!usb_host_read_file(line, sizeof(line), "bAlternateSetting",
device_name)) {
goto usbdevfs;
}
if (sscanf(line, "%d", &alt_setting) != 1) {
goto usbdevfs;
}
return alt_setting;
}
usbdevfs:
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_setting;
ct.timeout = 50;
ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
if (ret < 0) {
/* Assume alt 0 on error */
return 0;
}
return alt_setting;
}
/* 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;
int interface, length, i;
i = usb_linux_get_configuration(s);
if (i < 0)
return 1;
configuration = i;
/* 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];
alt_interface = usb_linux_get_alt_setting(s, configuration, interface);
/* 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;
s->endp_table[(devep & 0xf) - 1].max_packet_size =
descriptors[i + 4] + (descriptors[i + 5] << 8);
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 int usb_host_open(USBHostDevice *dev, int bus_num,
int addr, int devpath, const char *prod_name)
{
int fd = -1, ret;
struct usbdevfs_connectinfo ci;
char buf[1024];
if (dev->fd != -1) {
goto fail;
}
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);
dev->bus_num = bus_num;
dev->addr = addr;
dev->devpath = devpath;
dev->fd = fd;
/* 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
/*
* 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;
}
if (!prod_name || prod_name[0] == '\0') {
snprintf(dev->dev.product_desc, sizeof(dev->dev.product_desc),
"host:%d.%d", bus_num, addr);
} else {
pstrcpy(dev->dev.product_desc, sizeof(dev->dev.product_desc),
prod_name);
}
/* USB devio uses 'write' flag to check for async completions */
qemu_set_fd_handler(dev->fd, NULL, async_complete, dev);
usb_device_attach(&dev->dev);
return 0;
fail:
dev->fd = -1;
if (fd != -1) {
close(fd);
}
return -1;
}
static int usb_host_close(USBHostDevice *dev)
{
int i;
if (dev->fd == -1) {
return -1;
}
qemu_set_fd_handler(dev->fd, NULL, NULL, NULL);
dev->closing = 1;
for (i = 1; i < MAX_ENDPOINTS; i++) {
if (is_isoc(dev, i)) {
usb_host_stop_n_free_iso(dev, i);
}
}
async_complete(dev);
dev->closing = 0;
usb_device_detach(&dev->dev);
ioctl(dev->fd, USBDEVFS_RESET);
close(dev->fd);
dev->fd = -1;
return 0;
}
static void usb_host_exit_notifier(struct Notifier* n)
{
USBHostDevice *s = container_of(n, USBHostDevice, exit);
if (s->fd != -1) {
ioctl(s->fd, USBDEVFS_RESET);
}
}
static int usb_host_initfn(USBDevice *dev)
{
USBHostDevice *s = DO_UPCAST(USBHostDevice, dev, dev);
dev->auto_attach = 0;
s->fd = -1;
QTAILQ_INSERT_TAIL(&hostdevs, s, next);
s->exit.notify = usb_host_exit_notifier;
qemu_add_exit_notifier(&s->exit);
usb_host_auto_check(NULL);
return 0;
}
static struct USBDeviceInfo usb_host_dev_info = {
.product_desc = "USB Host Device",
.qdev.name = "usb-host",
.qdev.size = sizeof(USBHostDevice),
.init = usb_host_initfn,
.handle_packet = usb_host_handle_packet,
.handle_reset = usb_host_handle_reset,
.handle_destroy = usb_host_handle_destroy,
.usbdevice_name = "host",
.usbdevice_init = usb_host_device_open,
.qdev.props = (Property[]) {
DEFINE_PROP_UINT32("hostbus", USBHostDevice, match.bus_num, 0),
DEFINE_PROP_UINT32("hostaddr", USBHostDevice, match.addr, 0),
DEFINE_PROP_HEX32("vendorid", USBHostDevice, match.vendor_id, 0),
DEFINE_PROP_HEX32("productid", USBHostDevice, match.product_id, 0),
DEFINE_PROP_END_OF_LIST(),
},
};
static void usb_host_register_devices(void)
{
usb_qdev_register(&usb_host_dev_info);
}
device_init(usb_host_register_devices)
USBDevice *usb_host_device_open(const char *devname)
{
struct USBAutoFilter filter;
USBDevice *dev;
char *p;
dev = usb_create(NULL /* FIXME */, "usb-host");
if (strstr(devname, "auto:")) {
if (parse_filter(devname, &filter) < 0) {
goto fail;
}
} else {
if ((p = strchr(devname, '.'))) {
filter.bus_num = strtoul(devname, NULL, 0);
filter.addr = strtoul(p + 1, NULL, 0);
filter.vendor_id = 0;
filter.product_id = 0;
} else if ((p = strchr(devname, ':'))) {
filter.bus_num = 0;
filter.addr = 0;
filter.vendor_id = strtoul(devname, NULL, 16);
filter.product_id = strtoul(p + 1, NULL, 16);
} else {
goto fail;
}
}
qdev_prop_set_uint32(&dev->qdev, "hostbus", filter.bus_num);
qdev_prop_set_uint32(&dev->qdev, "hostaddr", filter.addr);
qdev_prop_set_uint32(&dev->qdev, "vendorid", filter.vendor_id);
qdev_prop_set_uint32(&dev->qdev, "productid", filter.product_id);
qdev_init_nofail(&dev->qdev);
return dev;
fail:
qdev_free(&dev->qdev);
return NULL;
}
int usb_host_device_close(const char *devname)
{
#if 0
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_delete_addr(s->bus_num, s->dev.addr);
return 0;
}
#endif
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 = NULL;
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, 0, 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, 0, 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)
{
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) {
ret = fgets(line, line_size, f) != NULL;
fclose(f);
}
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 = NULL;
char line[1024];
int bus_num, addr, devpath, 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;
}
if (sscanf(tmpstr, "%d-%d", &bus_num, &devpath) < 1) {
goto the_end;
}
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, devpath, 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 = NULL;
DIR *dir = NULL;
int ret = 0;
const char *fs_type[] = {"unknown", "proc", "dev", "sys"};
char devpath[PATH_MAX];
/* only check the host once */
if (!usb_fs_type) {
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;
}
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;
}
found_devices:
if (!usb_fs_type) {
if (mon) {
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);
if (mon) {
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;
}
static QEMUTimer *usb_auto_timer;
static int usb_host_auto_scan(void *opaque, int bus_num, int addr, int devpath,
int class_id, int vendor_id, int product_id,
const char *product_name, int speed)
{
struct USBAutoFilter *f;
struct USBHostDevice *s;
/* Ignore hubs */
if (class_id == 9)
return 0;
QTAILQ_FOREACH(s, &hostdevs, next) {
f = &s->match;
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 */
/* Already attached ? */
if (s->fd != -1) {
return 0;
}
DPRINTF("husb: auto open: bus_num %d addr %d\n", bus_num, addr);
usb_host_open(s, bus_num, addr, devpath, product_name);
}
return 0;
}
static void usb_host_auto_check(void *unused)
{
struct USBHostDevice *s;
int unconnected = 0;
usb_host_scan(NULL, usb_host_auto_scan);
QTAILQ_FOREACH(s, &hostdevs, next) {
if (s->fd == -1) {
unconnected++;
}
}
if (unconnected == 0) {
/* nothing to watch */
if (usb_auto_timer) {
qemu_del_timer(usb_auto_timer);
}
return;
}
if (!usb_auto_timer) {
usb_auto_timer = qemu_new_timer_ms(rt_clock, usb_host_auto_check, NULL);
if (!usb_auto_timer) {
return;
}
}
qemu_mod_timer(usb_auto_timer, qemu_get_clock_ms(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 = 0;
f->addr = 0;
f->vendor_id = 0;
f->product_id = 0;
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;
}
/**********************/
/* 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(Monitor *mon, int bus_num, int addr, int class_id,
int vendor_id, int product_id,
const char *product_name,
int speed)
{
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 devpath, int class_id,
int vendor_id, int product_id,
const char *product_name,
int speed)
{
Monitor *mon = opaque;
usb_info_device(mon, 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 == 0) {
snprintf(str, size, "*");
} else {
snprintf(str, size, "%d", val);
}
}
static void hex2str(int val, char *str, size_t size)
{
if (val == 0) {
snprintf(str, size, "*");
} else {
snprintf(str, size, "%04x", val);
}
}
void usb_host_info(Monitor *mon)
{
struct USBAutoFilter *f;
struct USBHostDevice *s;
usb_host_scan(mon, usb_host_info_device);
if (QTAILQ_EMPTY(&hostdevs)) {
return;
}
monitor_printf(mon, " Auto filters:\n");
QTAILQ_FOREACH(s, &hostdevs, next) {
char bus[10], addr[10], vid[10], pid[10];
f = &s->match;
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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