root / hw / usb / dev-storage.c @ 1de7afc9
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/*
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* USB Mass Storage Device emulation
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*
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* Copyright (c) 2006 CodeSourcery.
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* Written by Paul Brook
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*
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* This code is licensed under the LGPL.
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*/
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#include "qemu-common.h" |
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#include "qemu/option.h" |
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#include "qemu/config-file.h" |
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#include "hw/usb.h" |
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#include "hw/usb/desc.h" |
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#include "hw/scsi.h" |
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#include "ui/console.h" |
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#include "monitor/monitor.h" |
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#include "sysemu.h" |
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#include "blockdev.h" |
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|
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//#define DEBUG_MSD
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|
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#ifdef DEBUG_MSD
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#define DPRINTF(fmt, ...) \
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do { printf("usb-msd: " fmt , ## __VA_ARGS__); } while (0) |
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#else
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#define DPRINTF(fmt, ...) do {} while(0) |
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#endif
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|
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/* USB requests. */
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#define MassStorageReset 0xff |
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#define GetMaxLun 0xfe |
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enum USBMSDMode {
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USB_MSDM_CBW, /* Command Block. */
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USB_MSDM_DATAOUT, /* Transfer data to device. */
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USB_MSDM_DATAIN, /* Transfer data from device. */
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USB_MSDM_CSW /* Command Status. */
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}; |
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struct usb_msd_csw {
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uint32_t sig; |
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uint32_t tag; |
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uint32_t residue; |
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uint8_t status; |
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}; |
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typedef struct { |
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USBDevice dev; |
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enum USBMSDMode mode;
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uint32_t scsi_off; |
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uint32_t scsi_len; |
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uint32_t data_len; |
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struct usb_msd_csw csw;
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SCSIRequest *req; |
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SCSIBus bus; |
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BlockConf conf; |
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char *serial;
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SCSIDevice *scsi_dev; |
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uint32_t removable; |
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/* For async completion. */
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USBPacket *packet; |
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} MSDState; |
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|
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struct usb_msd_cbw {
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uint32_t sig; |
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uint32_t tag; |
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uint32_t data_len; |
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uint8_t flags; |
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uint8_t lun; |
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uint8_t cmd_len; |
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uint8_t cmd[16];
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}; |
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|
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enum {
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STR_MANUFACTURER = 1,
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STR_PRODUCT, |
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STR_SERIALNUMBER, |
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STR_CONFIG_FULL, |
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STR_CONFIG_HIGH, |
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STR_CONFIG_SUPER, |
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}; |
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|
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static const USBDescStrings desc_strings = { |
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[STR_MANUFACTURER] = "QEMU",
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[STR_PRODUCT] = "QEMU USB HARDDRIVE",
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[STR_SERIALNUMBER] = "1",
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[STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
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[STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
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[STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
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}; |
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|
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static const USBDescIface desc_iface_full = { |
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.bInterfaceNumber = 0,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_MASS_STORAGE, |
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.bInterfaceSubClass = 0x06, /* SCSI */ |
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.bInterfaceProtocol = 0x50, /* Bulk */ |
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.eps = (USBDescEndpoint[]) { |
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{ |
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.bEndpointAddress = USB_DIR_IN | 0x01,
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.bmAttributes = USB_ENDPOINT_XFER_BULK, |
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.wMaxPacketSize = 64,
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},{ |
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.bEndpointAddress = USB_DIR_OUT | 0x02,
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.bmAttributes = USB_ENDPOINT_XFER_BULK, |
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.wMaxPacketSize = 64,
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}, |
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} |
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}; |
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static const USBDescDevice desc_device_full = { |
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.bcdUSB = 0x0200,
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.bMaxPacketSize0 = 8,
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.bNumConfigurations = 1,
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.confs = (USBDescConfig[]) { |
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{ |
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.bNumInterfaces = 1,
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.bConfigurationValue = 1,
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.iConfiguration = STR_CONFIG_FULL, |
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.bmAttributes = 0xc0,
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.nif = 1,
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.ifs = &desc_iface_full, |
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}, |
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}, |
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}; |
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static const USBDescIface desc_iface_high = { |
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.bInterfaceNumber = 0,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_MASS_STORAGE, |
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.bInterfaceSubClass = 0x06, /* SCSI */ |
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.bInterfaceProtocol = 0x50, /* Bulk */ |
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.eps = (USBDescEndpoint[]) { |
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{ |
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.bEndpointAddress = USB_DIR_IN | 0x01,
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.bmAttributes = USB_ENDPOINT_XFER_BULK, |
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.wMaxPacketSize = 512,
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},{ |
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.bEndpointAddress = USB_DIR_OUT | 0x02,
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.bmAttributes = USB_ENDPOINT_XFER_BULK, |
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.wMaxPacketSize = 512,
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}, |
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} |
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}; |
146 |
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static const USBDescDevice desc_device_high = { |
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.bcdUSB = 0x0200,
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.bMaxPacketSize0 = 64,
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.bNumConfigurations = 1,
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.confs = (USBDescConfig[]) { |
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{ |
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.bNumInterfaces = 1,
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.bConfigurationValue = 1,
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.iConfiguration = STR_CONFIG_HIGH, |
156 |
.bmAttributes = 0xc0,
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.nif = 1,
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.ifs = &desc_iface_high, |
159 |
}, |
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}, |
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}; |
162 |
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static const USBDescIface desc_iface_super = { |
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.bInterfaceNumber = 0,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_MASS_STORAGE, |
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.bInterfaceSubClass = 0x06, /* SCSI */ |
168 |
.bInterfaceProtocol = 0x50, /* Bulk */ |
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.eps = (USBDescEndpoint[]) { |
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{ |
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.bEndpointAddress = USB_DIR_IN | 0x01,
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.bmAttributes = USB_ENDPOINT_XFER_BULK, |
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.wMaxPacketSize = 1024,
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.bMaxBurst = 15,
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},{ |
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.bEndpointAddress = USB_DIR_OUT | 0x02,
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.bmAttributes = USB_ENDPOINT_XFER_BULK, |
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.wMaxPacketSize = 1024,
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.bMaxBurst = 15,
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}, |
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} |
182 |
}; |
183 |
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static const USBDescDevice desc_device_super = { |
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.bcdUSB = 0x0300,
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.bMaxPacketSize0 = 9,
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.bNumConfigurations = 1,
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.confs = (USBDescConfig[]) { |
189 |
{ |
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.bNumInterfaces = 1,
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.bConfigurationValue = 1,
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.iConfiguration = STR_CONFIG_SUPER, |
193 |
.bmAttributes = 0xc0,
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.nif = 1,
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.ifs = &desc_iface_super, |
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}, |
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}, |
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}; |
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|
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static const USBDesc desc = { |
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.id = { |
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.idVendor = 0x46f4, /* CRC16() of "QEMU" */ |
203 |
.idProduct = 0x0001,
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.bcdDevice = 0,
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.iManufacturer = STR_MANUFACTURER, |
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.iProduct = STR_PRODUCT, |
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.iSerialNumber = STR_SERIALNUMBER, |
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}, |
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.full = &desc_device_full, |
210 |
.high = &desc_device_high, |
211 |
.super = &desc_device_super, |
212 |
.str = desc_strings, |
213 |
}; |
214 |
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static void usb_msd_copy_data(MSDState *s, USBPacket *p) |
216 |
{ |
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uint32_t len; |
218 |
len = p->iov.size - p->actual_length; |
219 |
if (len > s->scsi_len)
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len = s->scsi_len; |
221 |
usb_packet_copy(p, scsi_req_get_buf(s->req) + s->scsi_off, len); |
222 |
s->scsi_len -= len; |
223 |
s->scsi_off += len; |
224 |
s->data_len -= len; |
225 |
if (s->scsi_len == 0 || s->data_len == 0) { |
226 |
scsi_req_continue(s->req); |
227 |
} |
228 |
} |
229 |
|
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static void usb_msd_send_status(MSDState *s, USBPacket *p) |
231 |
{ |
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int len;
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DPRINTF("Command status %d tag 0x%x, len %zd\n",
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s->csw.status, le32_to_cpu(s->csw.tag), p->iov.size); |
236 |
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assert(s->csw.sig == cpu_to_le32(0x53425355));
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len = MIN(sizeof(s->csw), p->iov.size);
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usb_packet_copy(p, &s->csw, len); |
240 |
memset(&s->csw, 0, sizeof(s->csw)); |
241 |
} |
242 |
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static void usb_msd_packet_complete(MSDState *s) |
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{ |
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USBPacket *p = s->packet; |
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/* Set s->packet to NULL before calling usb_packet_complete
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because another request may be issued before
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usb_packet_complete returns. */
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DPRINTF("Packet complete %p\n", p);
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s->packet = NULL;
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usb_packet_complete(&s->dev, p); |
253 |
} |
254 |
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static void usb_msd_transfer_data(SCSIRequest *req, uint32_t len) |
256 |
{ |
257 |
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); |
258 |
USBPacket *p = s->packet; |
259 |
|
260 |
assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV)); |
261 |
s->scsi_len = len; |
262 |
s->scsi_off = 0;
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if (p) {
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usb_msd_copy_data(s, p); |
265 |
p = s->packet; |
266 |
if (p && p->actual_length == p->iov.size) {
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p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
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usb_msd_packet_complete(s); |
269 |
} |
270 |
} |
271 |
} |
272 |
|
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static void usb_msd_command_complete(SCSIRequest *req, uint32_t status, size_t resid) |
274 |
{ |
275 |
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); |
276 |
USBPacket *p = s->packet; |
277 |
|
278 |
DPRINTF("Command complete %d tag 0x%x\n", status, req->tag);
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|
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s->csw.sig = cpu_to_le32(0x53425355);
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s->csw.tag = cpu_to_le32(req->tag); |
282 |
s->csw.residue = cpu_to_le32(s->data_len); |
283 |
s->csw.status = status != 0;
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284 |
|
285 |
if (s->packet) {
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286 |
if (s->data_len == 0 && s->mode == USB_MSDM_DATAOUT) { |
287 |
/* A deferred packet with no write data remaining must be
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288 |
the status read packet. */
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289 |
usb_msd_send_status(s, p); |
290 |
s->mode = USB_MSDM_CBW; |
291 |
} else if (s->mode == USB_MSDM_CSW) { |
292 |
usb_msd_send_status(s, p); |
293 |
s->mode = USB_MSDM_CBW; |
294 |
} else {
|
295 |
if (s->data_len) {
|
296 |
int len = (p->iov.size - p->actual_length);
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297 |
usb_packet_skip(p, len); |
298 |
s->data_len -= len; |
299 |
} |
300 |
if (s->data_len == 0) { |
301 |
s->mode = USB_MSDM_CSW; |
302 |
} |
303 |
} |
304 |
p->status = USB_RET_SUCCESS; /* Clear previous ASYNC status */
|
305 |
usb_msd_packet_complete(s); |
306 |
} else if (s->data_len == 0) { |
307 |
s->mode = USB_MSDM_CSW; |
308 |
} |
309 |
scsi_req_unref(req); |
310 |
s->req = NULL;
|
311 |
} |
312 |
|
313 |
static void usb_msd_request_cancelled(SCSIRequest *req) |
314 |
{ |
315 |
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); |
316 |
|
317 |
if (req == s->req) {
|
318 |
scsi_req_unref(s->req); |
319 |
s->req = NULL;
|
320 |
s->scsi_len = 0;
|
321 |
} |
322 |
} |
323 |
|
324 |
static void usb_msd_handle_reset(USBDevice *dev) |
325 |
{ |
326 |
MSDState *s = (MSDState *)dev; |
327 |
|
328 |
DPRINTF("Reset\n");
|
329 |
if (s->req) {
|
330 |
scsi_req_cancel(s->req); |
331 |
} |
332 |
assert(s->req == NULL);
|
333 |
|
334 |
if (s->packet) {
|
335 |
s->packet->status = USB_RET_STALL; |
336 |
usb_msd_packet_complete(s); |
337 |
} |
338 |
|
339 |
s->mode = USB_MSDM_CBW; |
340 |
} |
341 |
|
342 |
static void usb_msd_handle_control(USBDevice *dev, USBPacket *p, |
343 |
int request, int value, int index, int length, uint8_t *data) |
344 |
{ |
345 |
MSDState *s = (MSDState *)dev; |
346 |
int ret;
|
347 |
|
348 |
ret = usb_desc_handle_control(dev, p, request, value, index, length, data); |
349 |
if (ret >= 0) { |
350 |
return;
|
351 |
} |
352 |
|
353 |
switch (request) {
|
354 |
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
|
355 |
break;
|
356 |
/* Class specific requests. */
|
357 |
case ClassInterfaceOutRequest | MassStorageReset:
|
358 |
/* Reset state ready for the next CBW. */
|
359 |
s->mode = USB_MSDM_CBW; |
360 |
break;
|
361 |
case ClassInterfaceRequest | GetMaxLun:
|
362 |
data[0] = 0; |
363 |
p->actual_length = 1;
|
364 |
break;
|
365 |
default:
|
366 |
p->status = USB_RET_STALL; |
367 |
break;
|
368 |
} |
369 |
} |
370 |
|
371 |
static void usb_msd_cancel_io(USBDevice *dev, USBPacket *p) |
372 |
{ |
373 |
MSDState *s = DO_UPCAST(MSDState, dev, dev); |
374 |
|
375 |
assert(s->packet == p); |
376 |
s->packet = NULL;
|
377 |
|
378 |
if (s->req) {
|
379 |
scsi_req_cancel(s->req); |
380 |
} |
381 |
} |
382 |
|
383 |
static void usb_msd_handle_data(USBDevice *dev, USBPacket *p) |
384 |
{ |
385 |
MSDState *s = (MSDState *)dev; |
386 |
uint32_t tag; |
387 |
struct usb_msd_cbw cbw;
|
388 |
uint8_t devep = p->ep->nr; |
389 |
|
390 |
switch (p->pid) {
|
391 |
case USB_TOKEN_OUT:
|
392 |
if (devep != 2) |
393 |
goto fail;
|
394 |
|
395 |
switch (s->mode) {
|
396 |
case USB_MSDM_CBW:
|
397 |
if (p->iov.size != 31) { |
398 |
fprintf(stderr, "usb-msd: Bad CBW size");
|
399 |
goto fail;
|
400 |
} |
401 |
usb_packet_copy(p, &cbw, 31);
|
402 |
if (le32_to_cpu(cbw.sig) != 0x43425355) { |
403 |
fprintf(stderr, "usb-msd: Bad signature %08x\n",
|
404 |
le32_to_cpu(cbw.sig)); |
405 |
goto fail;
|
406 |
} |
407 |
DPRINTF("Command on LUN %d\n", cbw.lun);
|
408 |
if (cbw.lun != 0) { |
409 |
fprintf(stderr, "usb-msd: Bad LUN %d\n", cbw.lun);
|
410 |
goto fail;
|
411 |
} |
412 |
tag = le32_to_cpu(cbw.tag); |
413 |
s->data_len = le32_to_cpu(cbw.data_len); |
414 |
if (s->data_len == 0) { |
415 |
s->mode = USB_MSDM_CSW; |
416 |
} else if (cbw.flags & 0x80) { |
417 |
s->mode = USB_MSDM_DATAIN; |
418 |
} else {
|
419 |
s->mode = USB_MSDM_DATAOUT; |
420 |
} |
421 |
DPRINTF("Command tag 0x%x flags %08x len %d data %d\n",
|
422 |
tag, cbw.flags, cbw.cmd_len, s->data_len); |
423 |
assert(le32_to_cpu(s->csw.residue) == 0);
|
424 |
s->scsi_len = 0;
|
425 |
s->req = scsi_req_new(s->scsi_dev, tag, 0, cbw.cmd, NULL); |
426 |
#ifdef DEBUG_MSD
|
427 |
scsi_req_print(s->req); |
428 |
#endif
|
429 |
scsi_req_enqueue(s->req); |
430 |
if (s->req && s->req->cmd.xfer != SCSI_XFER_NONE) {
|
431 |
scsi_req_continue(s->req); |
432 |
} |
433 |
break;
|
434 |
|
435 |
case USB_MSDM_DATAOUT:
|
436 |
DPRINTF("Data out %zd/%d\n", p->iov.size, s->data_len);
|
437 |
if (p->iov.size > s->data_len) {
|
438 |
goto fail;
|
439 |
} |
440 |
|
441 |
if (s->scsi_len) {
|
442 |
usb_msd_copy_data(s, p); |
443 |
} |
444 |
if (le32_to_cpu(s->csw.residue)) {
|
445 |
int len = p->iov.size - p->actual_length;
|
446 |
if (len) {
|
447 |
usb_packet_skip(p, len); |
448 |
s->data_len -= len; |
449 |
if (s->data_len == 0) { |
450 |
s->mode = USB_MSDM_CSW; |
451 |
} |
452 |
} |
453 |
} |
454 |
if (p->actual_length < p->iov.size) {
|
455 |
DPRINTF("Deferring packet %p [wait data-out]\n", p);
|
456 |
s->packet = p; |
457 |
p->status = USB_RET_ASYNC; |
458 |
} |
459 |
break;
|
460 |
|
461 |
default:
|
462 |
DPRINTF("Unexpected write (len %zd)\n", p->iov.size);
|
463 |
goto fail;
|
464 |
} |
465 |
break;
|
466 |
|
467 |
case USB_TOKEN_IN:
|
468 |
if (devep != 1) |
469 |
goto fail;
|
470 |
|
471 |
switch (s->mode) {
|
472 |
case USB_MSDM_DATAOUT:
|
473 |
if (s->data_len != 0 || p->iov.size < 13) { |
474 |
goto fail;
|
475 |
} |
476 |
/* Waiting for SCSI write to complete. */
|
477 |
s->packet = p; |
478 |
p->status = USB_RET_ASYNC; |
479 |
break;
|
480 |
|
481 |
case USB_MSDM_CSW:
|
482 |
if (p->iov.size < 13) { |
483 |
goto fail;
|
484 |
} |
485 |
|
486 |
if (s->req) {
|
487 |
/* still in flight */
|
488 |
DPRINTF("Deferring packet %p [wait status]\n", p);
|
489 |
s->packet = p; |
490 |
p->status = USB_RET_ASYNC; |
491 |
} else {
|
492 |
usb_msd_send_status(s, p); |
493 |
s->mode = USB_MSDM_CBW; |
494 |
} |
495 |
break;
|
496 |
|
497 |
case USB_MSDM_DATAIN:
|
498 |
DPRINTF("Data in %zd/%d, scsi_len %d\n",
|
499 |
p->iov.size, s->data_len, s->scsi_len); |
500 |
if (s->scsi_len) {
|
501 |
usb_msd_copy_data(s, p); |
502 |
} |
503 |
if (le32_to_cpu(s->csw.residue)) {
|
504 |
int len = p->iov.size - p->actual_length;
|
505 |
if (len) {
|
506 |
usb_packet_skip(p, len); |
507 |
s->data_len -= len; |
508 |
if (s->data_len == 0) { |
509 |
s->mode = USB_MSDM_CSW; |
510 |
} |
511 |
} |
512 |
} |
513 |
if (p->actual_length < p->iov.size) {
|
514 |
DPRINTF("Deferring packet %p [wait data-in]\n", p);
|
515 |
s->packet = p; |
516 |
p->status = USB_RET_ASYNC; |
517 |
} |
518 |
break;
|
519 |
|
520 |
default:
|
521 |
DPRINTF("Unexpected read (len %zd)\n", p->iov.size);
|
522 |
goto fail;
|
523 |
} |
524 |
break;
|
525 |
|
526 |
default:
|
527 |
DPRINTF("Bad token\n");
|
528 |
fail:
|
529 |
p->status = USB_RET_STALL; |
530 |
break;
|
531 |
} |
532 |
} |
533 |
|
534 |
static void usb_msd_password_cb(void *opaque, int err) |
535 |
{ |
536 |
MSDState *s = opaque; |
537 |
|
538 |
if (!err)
|
539 |
err = usb_device_attach(&s->dev); |
540 |
|
541 |
if (err)
|
542 |
qdev_unplug(&s->dev.qdev, NULL);
|
543 |
} |
544 |
|
545 |
static void *usb_msd_load_request(QEMUFile *f, SCSIRequest *req) |
546 |
{ |
547 |
MSDState *s = DO_UPCAST(MSDState, dev.qdev, req->bus->qbus.parent); |
548 |
|
549 |
/* nothing to load, just store req in our state struct */
|
550 |
assert(s->req == NULL);
|
551 |
scsi_req_ref(req); |
552 |
s->req = req; |
553 |
return NULL; |
554 |
} |
555 |
|
556 |
static const struct SCSIBusInfo usb_msd_scsi_info = { |
557 |
.tcq = false,
|
558 |
.max_target = 0,
|
559 |
.max_lun = 0,
|
560 |
|
561 |
.transfer_data = usb_msd_transfer_data, |
562 |
.complete = usb_msd_command_complete, |
563 |
.cancel = usb_msd_request_cancelled, |
564 |
.load_request = usb_msd_load_request, |
565 |
}; |
566 |
|
567 |
static int usb_msd_initfn(USBDevice *dev) |
568 |
{ |
569 |
MSDState *s = DO_UPCAST(MSDState, dev, dev); |
570 |
BlockDriverState *bs = s->conf.bs; |
571 |
|
572 |
if (!bs) {
|
573 |
error_report("drive property not set");
|
574 |
return -1; |
575 |
} |
576 |
|
577 |
blkconf_serial(&s->conf, &s->serial); |
578 |
|
579 |
/*
|
580 |
* Hack alert: this pretends to be a block device, but it's really
|
581 |
* a SCSI bus that can serve only a single device, which it
|
582 |
* creates automatically. But first it needs to detach from its
|
583 |
* blockdev, or else scsi_bus_legacy_add_drive() dies when it
|
584 |
* attaches again.
|
585 |
*
|
586 |
* The hack is probably a bad idea.
|
587 |
*/
|
588 |
bdrv_detach_dev(bs, &s->dev.qdev); |
589 |
s->conf.bs = NULL;
|
590 |
|
591 |
if (s->serial) {
|
592 |
usb_desc_set_string(dev, STR_SERIALNUMBER, s->serial); |
593 |
} else {
|
594 |
usb_desc_create_serial(dev); |
595 |
} |
596 |
|
597 |
usb_desc_init(dev); |
598 |
scsi_bus_new(&s->bus, &s->dev.qdev, &usb_msd_scsi_info); |
599 |
s->scsi_dev = scsi_bus_legacy_add_drive(&s->bus, bs, 0, !!s->removable,
|
600 |
s->conf.bootindex); |
601 |
if (!s->scsi_dev) {
|
602 |
return -1; |
603 |
} |
604 |
s->bus.qbus.allow_hotplug = 0;
|
605 |
usb_msd_handle_reset(dev); |
606 |
|
607 |
if (bdrv_key_required(bs)) {
|
608 |
if (cur_mon) {
|
609 |
monitor_read_bdrv_key_start(cur_mon, bs, usb_msd_password_cb, s); |
610 |
s->dev.auto_attach = 0;
|
611 |
} else {
|
612 |
autostart = 0;
|
613 |
} |
614 |
} |
615 |
|
616 |
return 0; |
617 |
} |
618 |
|
619 |
static USBDevice *usb_msd_init(USBBus *bus, const char *filename) |
620 |
{ |
621 |
static int nr=0; |
622 |
char id[8]; |
623 |
QemuOpts *opts; |
624 |
DriveInfo *dinfo; |
625 |
USBDevice *dev; |
626 |
const char *p1; |
627 |
char fmt[32]; |
628 |
|
629 |
/* parse -usbdevice disk: syntax into drive opts */
|
630 |
snprintf(id, sizeof(id), "usb%d", nr++); |
631 |
opts = qemu_opts_create(qemu_find_opts("drive"), id, 0, NULL); |
632 |
|
633 |
p1 = strchr(filename, ':');
|
634 |
if (p1++) {
|
635 |
const char *p2; |
636 |
|
637 |
if (strstart(filename, "format=", &p2)) { |
638 |
int len = MIN(p1 - p2, sizeof(fmt)); |
639 |
pstrcpy(fmt, len, p2); |
640 |
qemu_opt_set(opts, "format", fmt);
|
641 |
} else if (*filename != ':') { |
642 |
printf("unrecognized USB mass-storage option %s\n", filename);
|
643 |
return NULL; |
644 |
} |
645 |
filename = p1; |
646 |
} |
647 |
if (!*filename) {
|
648 |
printf("block device specification needed\n");
|
649 |
return NULL; |
650 |
} |
651 |
qemu_opt_set(opts, "file", filename);
|
652 |
qemu_opt_set(opts, "if", "none"); |
653 |
|
654 |
/* create host drive */
|
655 |
dinfo = drive_init(opts, 0);
|
656 |
if (!dinfo) {
|
657 |
qemu_opts_del(opts); |
658 |
return NULL; |
659 |
} |
660 |
|
661 |
/* create guest device */
|
662 |
dev = usb_create(bus, "usb-storage");
|
663 |
if (!dev) {
|
664 |
return NULL; |
665 |
} |
666 |
if (qdev_prop_set_drive(&dev->qdev, "drive", dinfo->bdrv) < 0) { |
667 |
qdev_free(&dev->qdev); |
668 |
return NULL; |
669 |
} |
670 |
if (qdev_init(&dev->qdev) < 0) |
671 |
return NULL; |
672 |
|
673 |
return dev;
|
674 |
} |
675 |
|
676 |
static const VMStateDescription vmstate_usb_msd = { |
677 |
.name = "usb-storage",
|
678 |
.version_id = 1,
|
679 |
.minimum_version_id = 1,
|
680 |
.fields = (VMStateField []) { |
681 |
VMSTATE_USB_DEVICE(dev, MSDState), |
682 |
VMSTATE_UINT32(mode, MSDState), |
683 |
VMSTATE_UINT32(scsi_len, MSDState), |
684 |
VMSTATE_UINT32(scsi_off, MSDState), |
685 |
VMSTATE_UINT32(data_len, MSDState), |
686 |
VMSTATE_UINT32(csw.sig, MSDState), |
687 |
VMSTATE_UINT32(csw.tag, MSDState), |
688 |
VMSTATE_UINT32(csw.residue, MSDState), |
689 |
VMSTATE_UINT8(csw.status, MSDState), |
690 |
VMSTATE_END_OF_LIST() |
691 |
} |
692 |
}; |
693 |
|
694 |
static Property msd_properties[] = {
|
695 |
DEFINE_BLOCK_PROPERTIES(MSDState, conf), |
696 |
DEFINE_PROP_STRING("serial", MSDState, serial),
|
697 |
DEFINE_PROP_BIT("removable", MSDState, removable, 0, false), |
698 |
DEFINE_PROP_END_OF_LIST(), |
699 |
}; |
700 |
|
701 |
static void usb_msd_class_initfn(ObjectClass *klass, void *data) |
702 |
{ |
703 |
DeviceClass *dc = DEVICE_CLASS(klass); |
704 |
USBDeviceClass *uc = USB_DEVICE_CLASS(klass); |
705 |
|
706 |
uc->init = usb_msd_initfn; |
707 |
uc->product_desc = "QEMU USB MSD";
|
708 |
uc->usb_desc = &desc; |
709 |
uc->cancel_packet = usb_msd_cancel_io; |
710 |
uc->handle_attach = usb_desc_attach; |
711 |
uc->handle_reset = usb_msd_handle_reset; |
712 |
uc->handle_control = usb_msd_handle_control; |
713 |
uc->handle_data = usb_msd_handle_data; |
714 |
dc->fw_name = "storage";
|
715 |
dc->vmsd = &vmstate_usb_msd; |
716 |
dc->props = msd_properties; |
717 |
} |
718 |
|
719 |
static TypeInfo msd_info = {
|
720 |
.name = "usb-storage",
|
721 |
.parent = TYPE_USB_DEVICE, |
722 |
.instance_size = sizeof(MSDState),
|
723 |
.class_init = usb_msd_class_initfn, |
724 |
}; |
725 |
|
726 |
static void usb_msd_register_types(void) |
727 |
{ |
728 |
type_register_static(&msd_info); |
729 |
usb_legacy_register("usb-storage", "disk", usb_msd_init); |
730 |
} |
731 |
|
732 |
type_init(usb_msd_register_types) |