external/qemu 0.8.2

1 files changed, 522 insertions, 0 deletions

diff --git a/usb-linux.c b/usb-linux.c
new file mode 100644
index 0000000..0a13753
--- /dev/null
+++ b/usb-linux.c
@@ -0,0 +1,522 @@
+/*
+ * Linux host USB redirector
+ *
+ * Copyright (c) 2005 Fabrice Bellard
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+#if defined(__linux__)
+#include <dirent.h>
+#include <sys/ioctl.h>
+#include <linux/compiler.h>
+#include <linux/usbdevice_fs.h>
+#include <linux/version.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;
+};
+
+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
+
+#define USBDEVFS_PATH "/proc/bus/usb"
+#define PRODUCT_NAME_SZ 32
+
+typedef struct USBHostDevice {
+    USBDevice dev;
+    int fd;
+} USBHostDevice;
+
+static void usb_host_handle_reset(USBDevice *dev)
+{
+#if 0
+    USBHostDevice *s = (USBHostDevice *)dev;
+    /* USBDEVFS_RESET, but not the first time as it has already be
+       done by the host OS */
+    ioctl(s->fd, USBDEVFS_RESET);
+#endif
+} 
+
+static void usb_host_handle_destroy(USBDevice *dev)
+{
+    USBHostDevice *s = (USBHostDevice *)dev;
+
+    if (s->fd >= 0)
+        close(s->fd);
+    qemu_free(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;
+    int ret;
+
+    if (request == (DeviceOutRequest | USB_REQ_SET_ADDRESS)) {
+        /* specific SET_ADDRESS support */
+        dev->addr = value;
+        return 0;
+    } else {
+        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);
+        if (ret < 0) {
+            switch(errno) {
+            case ETIMEDOUT:
+                return USB_RET_NAK;
+            default:
+                return USB_RET_STALL;
+            }
+        } else {
+            return ret;
+        }
+   }
+}
+
+static int usb_host_handle_data(USBDevice *dev, int pid, 
+                                uint8_t devep,
+                                uint8_t *data, int len)
+{
+    USBHostDevice *s = (USBHostDevice *)dev;
+    struct usbdevfs_bulktransfer bt;
+    int ret;
+
+    /* XXX: optimize and handle all data types by looking at the
+       config descriptor */
+    if (pid == USB_TOKEN_IN)
+        devep |= 0x80;
+    bt.ep = devep;
+    bt.len = len;
+    bt.timeout = 50;
+    bt.data = data;
+    ret = ioctl(s->fd, USBDEVFS_BULK, &bt);
+    if (ret < 0) {
+        switch(errno) {
+        case ETIMEDOUT:
+            return USB_RET_NAK;
+        case EPIPE:
+        default:
+#ifdef DEBUG
+            printf("handle_data: errno=%d\n", errno);
+#endif
+            return USB_RET_STALL;
+        }
+    } else {
+        return ret;
+    }
+}
+
+/* XXX: exclude high speed devices or implement EHCI */
+USBDevice *usb_host_device_open(const char *devname)
+{
+    int fd, interface, ret, i;
+    USBHostDevice *dev;
+    struct usbdevfs_connectinfo ci;
+    uint8_t descr[1024];
+    char buf[1024];
+    int descr_len, dev_descr_len, config_descr_len, nb_interfaces;
+    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) 
+        return NULL;
+    
+    snprintf(buf, sizeof(buf), USBDEVFS_PATH "/%03d/%03d", 
+             bus_num, addr);
+    fd = open(buf, O_RDWR);
+    if (fd < 0) {
+        perror(buf);
+        return NULL;
+    }
+
+    /* read the config description */
+    descr_len = read(fd, descr, sizeof(descr));
+    if (descr_len <= 0) {
+        perror("read descr");
+        goto fail;
+    }
+    
+    i = 0;
+    dev_descr_len = descr[0];
+    if (dev_descr_len > descr_len)
+        goto fail;
+    i += dev_descr_len;
+    config_descr_len = descr[i];
+    if (i + config_descr_len > descr_len)
+        goto fail;
+    nb_interfaces = descr[i + 4];
+    if (nb_interfaces != 1) {
+        /* NOTE: currently we grab only one interface */
+        fprintf(stderr, "usb_host: only one interface supported\n");
+        goto fail;
+    }
+
+#ifdef USBDEVFS_DISCONNECT
+    /* earlier Linux 2.4 do not support that */
+    {
+        struct usbdevfs_ioctl ctrl;
+        ctrl.ioctl_code = USBDEVFS_DISCONNECT;
+        ctrl.ifno = 0;
+        ret = ioctl(fd, USBDEVFS_IOCTL, &ctrl);
+        if (ret < 0 && errno != ENODATA) {
+            perror("USBDEVFS_DISCONNECT");
+            goto fail;
+        }
+    }
+#endif
+
+    /* XXX: only grab if all interfaces are free */
+    interface = 0;
+    ret = ioctl(fd, USBDEVFS_CLAIMINTERFACE, &interface);
+    if (ret < 0) {
+        if (errno == EBUSY) {
+            fprintf(stderr, "usb_host: device already grabbed\n");
+        } else {
+            perror("USBDEVFS_CLAIMINTERFACE");
+        }
+    fail:
+        close(fd);
+        return NULL;
+    }
+
+    ret = ioctl(fd, USBDEVFS_CONNECTINFO, &ci);
+    if (ret < 0) {
+        perror("USBDEVFS_CONNECTINFO");
+        goto fail;
+    }
+
+#ifdef DEBUG
+    printf("host USB device %d.%d grabbed\n", bus_num, addr);
+#endif    
+
+    dev = qemu_mallocz(sizeof(USBHostDevice));
+    if (!dev)
+        goto fail;
+    dev->fd = fd;
+    if (ci.slow)
+        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_destroy = usb_host_handle_destroy;
+
+    if (product_name[0] == '\0')
+        snprintf(dev->dev.devname, sizeof(dev->dev.devname),
+                 "host:%s", devname);
+    else
+        pstrcpy(dev->dev.devname, sizeof(dev->dev.devname),
+                product_name);
+
+    return (USBDevice *)dev;
+}
+
+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 (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;
+}
+
+static int usb_host_scan(void *opaque, USBScanFunc *func)
+{
+    FILE *f;
+    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];
+    
+    f = fopen(USBDEVFS_PATH "/devices", "r");
+    if (!f) {
+        term_printf("Could not open %s\n", USBDEVFS_PATH "/devices");
+        return 0;
+    }
+    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;
+        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:
+    fclose(f);
+    return ret;
+}
+
+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;
+}
+
+void usb_info_device(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;
+    }
+
+    term_printf("  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);
+    else
+        term_printf("    Class %02x:", class_id);
+    term_printf(" USB device %04x:%04x", vendor_id, product_id);
+    if (product_name[0] != '\0')
+        term_printf(", %s", product_name);
+    term_printf("\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;
+}
+
+void usb_host_info(void)
+{
+    usb_host_scan(NULL, usb_host_info_device);
+}
+
+#else
+
+void usb_host_info(void)
+{
+    term_printf("USB host devices not supported\n");
+}
+
+/* XXX: modify configure to compile the right host driver */
+USBDevice *usb_host_device_open(const char *devname)
+{
+    return NULL;
+}
+
+#endif