*
* 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
+ *
+ * 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
* 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 "hw/usb.h"
#include "console.h"
#if defined(__linux__)
#include <dirent.h>
#include <sys/ioctl.h>
+#include <signal.h>
+
#include <linux/usbdevice_fs.h>
#include <linux/version.h>
-#include <signal.h>
+#include "hw/usb.h"
/* We redefine it to avoid version problems */
struct usb_ctrltransfer {
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(...)
#endif
-#define USBDEVFS_PATH "/proc/bus/usb"
+#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;
-struct sigaction sigact;
+#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 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 */
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;
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:
}
}
-static int usb_host_update_interfaces(USBHostDevice *dev, int configuration)
+static int usb_host_claim_interfaces(USBHostDevice *dev, int configuration)
{
int dev_descr_len, config_descr_len;
int interface, nb_interfaces, nb_configurations;
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)
printf("husb: config #%d need %d\n", dev->descr[i + 5], configuration);
- if (configuration < 0 || configuration == dev->descr[i + 5])
+ if (configuration < 0 || configuration == dev->descr[i + 5]) {
+ configuration = dev->descr[i + 5];
break;
+ }
i += config_descr_len;
}
if (i >= dev->descr_len) {
- printf("husb: update iface failed. no matching configuration\n");
+ fprintf(stderr, "husb: update iface failed. no matching configuration\n");
goto fail;
}
nb_interfaces = dev->descr[i + 4];
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;
+ USBHostDevice *s = (USBHostDevice *) dev;
dprintf("husb: reset device %u.%u\n", s->bus_num, s->addr);
ioctl(s->fd, USBDEVFS_RESET);
- usb_host_update_interfaces(s, s->configuration);
+
+ usb_host_claim_interfaces(s, s->configuration);
}
static void usb_host_handle_destroy(USBDevice *dev)
static int usb_linux_update_endp_table(USBHostDevice *s);
-static int usb_host_handle_control(USBDevice *dev,
- int request,
- int value,
- int index,
- int length,
- uint8_t *data)
-{
- USBHostDevice *s = (USBHostDevice *)dev;
- struct usb_ctrltransfer ct;
- struct usbdevfs_setinterface si;
- int intf_update_required = 0;
- int ret;
-
- if (request == (DeviceOutRequest | USB_REQ_SET_ADDRESS)) {
- /* specific SET_ADDRESS support */
- dev->addr = value;
- return 0;
- } else if (request == ((USB_RECIP_INTERFACE << 8) |
- USB_REQ_SET_INTERFACE)) {
- /* set alternate setting for the interface */
- si.interface = index;
- si.altsetting = value;
- ret = ioctl(s->fd, USBDEVFS_SETINTERFACE, &si);
- usb_linux_update_endp_table(s);
- } else if (request == (DeviceOutRequest | USB_REQ_SET_CONFIGURATION)) {
- dprintf("husb: ctrl set config %d\n", value & 0xff);
- if (s->configuration != (value & 0xff)) {
- s->configuration = (value & 0xff);
- intf_update_required = 1;
- }
- goto do_request;
- } else {
- do_request:
- ct.bRequestType = request >> 8;
- ct.bRequest = request;
- ct.wValue = value;
- ct.wIndex = index;
- ct.wLength = length;
- ct.timeout = 50;
- ct.data = data;
- ret = ioctl(s->fd, USBDEVFS_CONTROL, &ct);
-
- dprintf("husb: ctrl req 0x%x val 0x%x index %u len %u ret %d\n",
- ct.bRequest, ct.wValue, ct.wIndex, ct.wLength, ret);
- }
-
- if (ret < 0) {
- switch(errno) {
- case ETIMEDOUT:
- return USB_RET_NAK;
- default:
- return USB_RET_STALL;
- }
- } else {
- if (intf_update_required) {
- dprintf("husb: updating interfaces\n");
- usb_host_update_interfaces(s, value & 0xff);
- }
- return ret;
- }
-}
-
-static int usb_host_handle_data(USBDevice *dev, USBPacket *p)
+static int usb_host_handle_data(USBHostDevice *s, USBPacket *p)
{
- USBHostDevice *s = (USBHostDevice *) dev;
- AsyncURB *aurb;
struct usbdevfs_urb *urb;
+ AsyncURB *aurb;
int ret;
aurb = async_alloc();
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();
+ if (!aurb) {
+ dprintf("husb: async malloc failed\n");
+ return USB_RET_NAK;
+ }
+ 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;
+ struct usbdevfs_ctrltransfer ct;
int interface, ret, length, i;
ct.bRequestType = USB_DIR_IN;
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));
#endif
dev->fd = fd;
- dev->configuration = 1;
- /* XXX - do something about initial configuration */
- if (!usb_host_update_interfaces(dev, -1))
+ /*
+ * 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);
dev->dev.speed = USB_SPEED_LOW;
else
dev->dev.speed = USB_SPEED_HIGH;
- dev->dev.handle_packet = usb_generic_handle_packet;
- dev->dev.handle_reset = usb_host_handle_reset;
- dev->dev.handle_control = usb_host_handle_control;
- dev->dev.handle_data = usb_host_handle_data;
+ 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')
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)
{
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)) {
+ term_printf("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,
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)
+{
+ FILE *f;
+ int ret = 0;
+ char filename[PATH_MAX];
+
+ snprintf(filename, PATH_MAX, device_file, device_name);
+ f = fopen(filename, "r");
+ if (f) {
+ fgets(line, line_size, f);
+ fclose(f);
+ ret = 1;
+ } else {
+ term_printf("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), USBSYSBUS_PATH "/devices/%s/devnum", de->d_name))
+ goto the_end;
+ if (sscanf(line, "%d", &addr) != 1)
+ goto the_end;
+
+ if (!usb_host_read_file(line, sizeof(line), USBSYSBUS_PATH "/devices/%s/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), USBSYSBUS_PATH "/devices/%s/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), USBSYSBUS_PATH "/devices/%s/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), USBSYSBUS_PATH "/devices/%s/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), USBSYSBUS_PATH "/devices/%s/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)
+{
+ FILE *f = 0;
+ DIR *dir = 0;
+ int ret = 0;
+ const char *devices = "/devices";
+ const char *opened = "husb: opened %s%s\n";
+ 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(opened, USBPROCBUS_PATH, devices);
+ }
+ /* try additional methods if an access method hasn't been found yet */
+ f = fopen(USBDEVBUS_PATH "/devices", "r");
+ if (!usb_fs_type && f) {
+ /* devices found in /dev/bus/usb/ */
+ strcpy(devpath, USBDEVBUS_PATH);
+ usb_fs_type = USB_FS_DEV;
+ fclose(f);
+ dprintf(opened, USBDEVBUS_PATH, devices);
+ }
+ dir = opendir(USBSYSBUS_PATH "/devices");
+ if (!usb_fs_type && dir) {
+ /* devices found in /dev/bus/usb/ (yes - not a mistake!) */
+ strcpy(devpath, USBDEVBUS_PATH);
+ usb_fs_type = USB_FS_SYS;
+ closedir(dir);
+ dprintf(opened, USBSYSBUS_PATH, devices);
+ } else {
+ term_printf("husb: unable to access USB devices\n");
+ goto the_end;
+ }
+
+ /* the module setting (used later for opening devices) */
+ usb_host_device_path = qemu_mallocz(strlen(devpath)+1);
+ if (usb_host_device_path) {
+ strcpy(usb_host_device_path, devpath);
+ term_printf("husb: using %s file-system with %s\n", fs_type[usb_fs_type], usb_host_device_path);
+ } else {
+ /* out of memory? */
+ perror("husb: unable to allocate memory for device path");
+ goto the_end;
+ }
+ }
+
+ 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;
+ }
+ the_end:
return ret;
}
return 0;
for (f = usb_auto_filter; f; f = f->next) {
- // printf("Auto match: bus_num %d addr %d vid %d pid %d\n",
- // bus_num, addr, vendor_id, product_id);
-
if (f->bus_num >= 0 && f->bus_num != bus_num)
continue;
}
/*
- * 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)
+{
+ 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 *f = qemu_mallocz(sizeof(*f));
+ struct USBAutoFilter filter, *f;
+
+ if (parse_filter(spec, &filter) < 0)
+ return -1;
+
+ f = qemu_mallocz(sizeof(*f));
if (!f) {
- printf("husb: failed to allocate auto filter\n");
- return;
+ fprintf(stderr, "husb: failed to allocate auto filter\n");
+ return -1;
}
- f->bus_num = bus_num;
- f->addr = addr;
- f->vendor_id = vendor_id;
- f->product_id = product_id;
+ *f = filter;
if (!usb_auto_filter) {
/*
*/
usb_auto_timer = qemu_new_timer(rt_clock, usb_host_auto_timer, NULL);
if (!usb_auto_timer) {
- printf("husb: failed to allocate timer\n");
+ 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) {
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(void)
{
+ struct USBAutoFilter *f;
+
usb_host_scan(NULL, usb_host_info_device);
+
+ if (usb_auto_filter)
+ term_printf(" 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));
+ term_printf(" Device %s.%s ID %s:%s\n", bus, addr, vid, pid);
+ }
}
#else
+#include "hw/usb.h"
+
void usb_host_info(void)
{
term_printf("USB host devices not supported\n");
return NULL;
}
+int usb_host_device_close(const char *devname)
+{
+ return 0;
+}
+
#endif
projects / qemu.git / blobdiff