*
* Copyright (c) 2008 Max Krasnyansky
* Support for host device auto connect & disconnect
- * Magor rewrite to support fully async operation
+ * 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
#include "qemu-common.h"
#include "qemu-timer.h"
-#include "console.h"
+#include "monitor.h"
-#if defined(__linux__)
#include <dirent.h>
#include <sys/ioctl.h>
#include <signal.h>
-#include <linux/usb/ch9.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);
#define dprintf(...)
#endif
-#define USBDEVFS_PATH "/proc/bus/usb"
+#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 {
int ret;
aurb = async_alloc();
- if (!aurb) {
- dprintf("husb: async malloc failed\n");
- return USB_RET_NAK;
- }
aurb->hdev = s;
aurb->packet = p;
/* The rest are asynchronous */
aurb = async_alloc();
- if (!aurb) {
- dprintf("husb: async malloc failed\n");
- return USB_RET_NAK;
- }
aurb->hdev = s;
aurb->packet = p;
*
* Returns length of the transaction or one of the USB_RET_XXX codes.
*/
-int usb_host_handle_packet(USBDevice *s, USBPacket *p)
+static int usb_host_handle_packet(USBDevice *s, USBPacket *p)
{
switch(p->pid) {
case USB_MSG_ATTACH:
{
uint8_t *descriptors;
uint8_t devep, type, configuration, alt_interface;
- struct usbdevfs_ctrltransfer ct;
+ struct usb_ctrltransfer ct;
int interface, ret, length, i;
ct.bRequestType = USB_DIR_IN;
char buf[1024];
dev = qemu_mallocz(sizeof(USBHostDevice));
- if (!dev)
- goto fail;
dev->bus_num = bus_num;
dev->addr = addr;
printf("husb: open device %d.%d\n", bus_num, addr);
- snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d",
+ 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));
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 (usb_host_find_device(&bus_num, &addr,
- product_name, sizeof(product_name),
- devname) < 0)
+ if (strstr(devname, "auto:")) {
+ usb_host_auto_add(devname);
return NULL;
+ }
- if (hostdev_find(bus_num, addr)) {
- term_printf("husb: host usb device %d.%d is already open\n", bus_num, addr);
+ 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,
if (!p)
return -1;
p += strlen(tag);
- while (isspace(*p))
+ while (qemu_isspace(*p))
p++;
q = buf;
while (*p != '\0' && !strchr(stopchars, *p)) {
return q - buf;
}
-static int usb_host_scan(void *opaque, USBScanFunc *func)
+/*
+ * 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;
+ FILE *f = 0;
char line[1024];
char buf[1024];
int bus_num, addr, speed, device_count, class_id, product_id, vendor_id;
- int ret;
char product_name[512];
+ int ret = 0;
- f = fopen(USBDEVFS_PATH "/devices", "r");
+ 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) {
- term_printf("husb: could not open %s\n", USBDEVFS_PATH "/devices");
- return 0;
+ perror("husb: cannot open devices file");
+ goto the_end;
}
+
device_count = 0;
bus_num = addr = speed = class_id = product_id = vendor_id = 0;
- ret = 0;
for(;;) {
if (fgets(line, sizeof(line), f) == NULL)
break;
product_id, product_name, speed);
}
the_end:
- fclose(f);
+ 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;
}
}
/*
- * Add autoconnect filter
- * -1 means 'any' (device, vendor, etc)
+ * 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 void usb_host_auto_add(int bus_num, int addr, int vendor_id, int product_id)
+static int parse_filter(const char *spec, struct USBAutoFilter *f)
{
- struct USBAutoFilter *f = qemu_mallocz(sizeof(*f));
- if (!f) {
- fprintf(stderr, "husb: failed to allocate auto filter\n");
- return;
+ 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;
+ }
}
- f->bus_num = bus_num;
- f->addr = addr;
- f->vendor_id = vendor_id;
- f->product_id = product_id;
+ 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) {
/*
if (!usb_auto_timer) {
fprintf(stderr, "husb: failed to allocate auto scan timer\n");
qemu_free(f);
- return;
+ return -1;
}
/* Check for new devices every two seconds */
qemu_mod_timer(usb_auto_timer, qemu_get_clock(rt_clock) + 2000);
}
- dprintf("husb: auto filter: bus_num %d addr %d vid %d pid %d\n",
- bus_num, addr, vendor_id, product_id);
+ 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 {
p = strchr(devname, '.');
if (p) {
*pbus_num = strtoul(devname, NULL, 0);
-
- if (*(p + 1) == '*') {
- usb_host_auto_add(*pbus_num, -1, -1, -1);
- return -1;
- }
-
*paddr = strtoul(p + 1, NULL, 0);
fs.bus_num = *pbus_num;
fs.addr = *paddr;
pstrcpy(product_name, product_name_size, fs.product_name);
return 0;
}
+
p = strchr(devname, ':');
if (p) {
fs.vendor_id = strtoul(devname, NULL, 16);
-
- if (*(p + 1) == '*') {
- usb_host_auto_add(-1, -1, fs.vendor_id, -1);
- return -1;
- }
-
fs.product_id = strtoul(p + 1, NULL, 16);
ret = usb_host_scan(&fs, usb_host_find_device_scan);
if (ret) {
const char *product_name,
int speed)
{
+ Monitor *mon = cur_mon;
const char *class_str, *speed_str;
switch(speed) {
break;
}
- term_printf(" Device %d.%d, speed %s Mb/s\n",
+ 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)
- term_printf(" %s:", class_str);
+ monitor_printf(mon, " %s:", class_str);
else
- term_printf(" Class %02x:", class_id);
- term_printf(" USB device %04x:%04x", vendor_id, product_id);
+ monitor_printf(mon, " Class %02x:", class_id);
+ monitor_printf(mon, " USB device %04x:%04x", vendor_id, product_id);
if (product_name[0] != '\0')
- term_printf(", %s", product_name);
- term_printf("\n");
+ monitor_printf(mon, ", %s", product_name);
+ monitor_printf(mon, "\n");
}
static int usb_host_info_device(void *opaque, int bus_num, int addr,
return 0;
}
-void usb_host_info(void)
+static void dec2str(int val, char *str, size_t size)
{
- usb_host_scan(NULL, usb_host_info_device);
+ if (val == -1)
+ snprintf(str, size, "*");
+ else
+ snprintf(str, size, "%d", val);
}
-#else
-
-#include "hw/usb.h"
-
-void usb_host_info(void)
+static void hex2str(int val, char *str, size_t size)
{
- term_printf("USB host devices not supported\n");
+ if (val == -1)
+ snprintf(str, size, "*");
+ else
+ snprintf(str, size, "%x", val);
}
-/* XXX: modify configure to compile the right host driver */
-USBDevice *usb_host_device_open(const char *devname)
+void usb_host_info(Monitor *mon)
{
- return NULL;
-}
+ struct USBAutoFilter *f;
-#endif
+ 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);
+ }
+}
projects / qemu / blobdiff