0fc5c15a4f
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1945 c046a42c-6fe2-441c-8c8c-71466251a162
396 lines
11 KiB
C
396 lines
11 KiB
C
/*
|
|
* USB Mass Storage Device emulation
|
|
*
|
|
* Copyright (c) 2006 CodeSourcery.
|
|
* Written by Paul Brook
|
|
*
|
|
* This code is licenced under the LGPL.
|
|
*/
|
|
|
|
#include "vl.h"
|
|
|
|
//#define DEBUG_MSD
|
|
|
|
#ifdef DEBUG_MSD
|
|
#define DPRINTF(fmt, args...) \
|
|
do { printf("usb-msd: " fmt , ##args); } while (0)
|
|
#else
|
|
#define DPRINTF(fmt, args...) do {} while(0)
|
|
#endif
|
|
|
|
/* USB requests. */
|
|
#define MassStorageReset 0xff
|
|
#define GetMaxLun 0xfe
|
|
|
|
enum USBMSDMode {
|
|
USB_MSDM_CBW, /* Command Block. */
|
|
USB_MSDM_DATAOUT, /* Tranfer data to device. */
|
|
USB_MSDM_DATAIN, /* Transfer data from device. */
|
|
USB_MSDM_CSW /* Command Status. */
|
|
};
|
|
|
|
typedef struct {
|
|
USBDevice dev;
|
|
enum USBMSDMode mode;
|
|
uint32_t data_len;
|
|
uint32_t tag;
|
|
SCSIDevice *scsi_dev;
|
|
int result;
|
|
} MSDState;
|
|
|
|
static const uint8_t qemu_msd_dev_descriptor[] = {
|
|
0x12, /* u8 bLength; */
|
|
0x01, /* u8 bDescriptorType; Device */
|
|
0x10, 0x00, /* u16 bcdUSB; v1.0 */
|
|
|
|
0x00, /* u8 bDeviceClass; */
|
|
0x00, /* u8 bDeviceSubClass; */
|
|
0x00, /* u8 bDeviceProtocol; [ low/full speeds only ] */
|
|
0x08, /* u8 bMaxPacketSize0; 8 Bytes */
|
|
|
|
/* Vendor and product id are arbitrary. */
|
|
0x00, 0x00, /* u16 idVendor; */
|
|
0x00, 0x00, /* u16 idProduct; */
|
|
0x00, 0x00, /* u16 bcdDevice */
|
|
|
|
0x01, /* u8 iManufacturer; */
|
|
0x02, /* u8 iProduct; */
|
|
0x03, /* u8 iSerialNumber; */
|
|
0x01 /* u8 bNumConfigurations; */
|
|
};
|
|
|
|
static const uint8_t qemu_msd_config_descriptor[] = {
|
|
|
|
/* one configuration */
|
|
0x09, /* u8 bLength; */
|
|
0x02, /* u8 bDescriptorType; Configuration */
|
|
0x20, 0x00, /* u16 wTotalLength; */
|
|
0x01, /* u8 bNumInterfaces; (1) */
|
|
0x01, /* u8 bConfigurationValue; */
|
|
0x00, /* u8 iConfiguration; */
|
|
0xc0, /* u8 bmAttributes;
|
|
Bit 7: must be set,
|
|
6: Self-powered,
|
|
5: Remote wakeup,
|
|
4..0: resvd */
|
|
0x00, /* u8 MaxPower; */
|
|
|
|
/* one interface */
|
|
0x09, /* u8 if_bLength; */
|
|
0x04, /* u8 if_bDescriptorType; Interface */
|
|
0x00, /* u8 if_bInterfaceNumber; */
|
|
0x00, /* u8 if_bAlternateSetting; */
|
|
0x02, /* u8 if_bNumEndpoints; */
|
|
0x08, /* u8 if_bInterfaceClass; MASS STORAGE */
|
|
0x06, /* u8 if_bInterfaceSubClass; SCSI */
|
|
0x50, /* u8 if_bInterfaceProtocol; Bulk Only */
|
|
0x00, /* u8 if_iInterface; */
|
|
|
|
/* Bulk-In endpoint */
|
|
0x07, /* u8 ep_bLength; */
|
|
0x05, /* u8 ep_bDescriptorType; Endpoint */
|
|
0x81, /* u8 ep_bEndpointAddress; IN Endpoint 1 */
|
|
0x02, /* u8 ep_bmAttributes; Bulk */
|
|
0x40, 0x00, /* u16 ep_wMaxPacketSize; */
|
|
0x00, /* u8 ep_bInterval; */
|
|
|
|
/* Bulk-Out endpoint */
|
|
0x07, /* u8 ep_bLength; */
|
|
0x05, /* u8 ep_bDescriptorType; Endpoint */
|
|
0x02, /* u8 ep_bEndpointAddress; OUT Endpoint 2 */
|
|
0x02, /* u8 ep_bmAttributes; Bulk */
|
|
0x40, 0x00, /* u16 ep_wMaxPacketSize; */
|
|
0x00 /* u8 ep_bInterval; */
|
|
};
|
|
|
|
static void usb_msd_command_complete(void *opaque, uint32_t tag, int fail)
|
|
{
|
|
MSDState *s = (MSDState *)opaque;
|
|
|
|
DPRINTF("Command complete\n");
|
|
s->result = fail;
|
|
s->mode = USB_MSDM_CSW;
|
|
}
|
|
|
|
static void usb_msd_handle_reset(USBDevice *dev, int destroy)
|
|
{
|
|
MSDState *s = (MSDState *)dev;
|
|
|
|
DPRINTF("Reset\n");
|
|
s->mode = USB_MSDM_CBW;
|
|
if (destroy) {
|
|
scsi_disk_destroy(s->scsi_dev);
|
|
qemu_free(s);
|
|
}
|
|
}
|
|
|
|
static int usb_msd_handle_control(USBDevice *dev, int request, int value,
|
|
int index, int length, uint8_t *data)
|
|
{
|
|
MSDState *s = (MSDState *)dev;
|
|
int ret = 0;
|
|
|
|
switch (request) {
|
|
case DeviceRequest | USB_REQ_GET_STATUS:
|
|
data[0] = (1 << USB_DEVICE_SELF_POWERED) |
|
|
(dev->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP);
|
|
data[1] = 0x00;
|
|
ret = 2;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
|
|
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
|
dev->remote_wakeup = 0;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_FEATURE:
|
|
if (value == USB_DEVICE_REMOTE_WAKEUP) {
|
|
dev->remote_wakeup = 1;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_ADDRESS:
|
|
dev->addr = value;
|
|
ret = 0;
|
|
break;
|
|
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
|
|
switch(value >> 8) {
|
|
case USB_DT_DEVICE:
|
|
memcpy(data, qemu_msd_dev_descriptor,
|
|
sizeof(qemu_msd_dev_descriptor));
|
|
ret = sizeof(qemu_msd_dev_descriptor);
|
|
break;
|
|
case USB_DT_CONFIG:
|
|
memcpy(data, qemu_msd_config_descriptor,
|
|
sizeof(qemu_msd_config_descriptor));
|
|
ret = sizeof(qemu_msd_config_descriptor);
|
|
break;
|
|
case USB_DT_STRING:
|
|
switch(value & 0xff) {
|
|
case 0:
|
|
/* language ids */
|
|
data[0] = 4;
|
|
data[1] = 3;
|
|
data[2] = 0x09;
|
|
data[3] = 0x04;
|
|
ret = 4;
|
|
break;
|
|
case 1:
|
|
/* vendor description */
|
|
ret = set_usb_string(data, "QEMU " QEMU_VERSION);
|
|
break;
|
|
case 2:
|
|
/* product description */
|
|
ret = set_usb_string(data, "QEMU USB HARDDRIVE");
|
|
break;
|
|
case 3:
|
|
/* serial number */
|
|
ret = set_usb_string(data, "1");
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
break;
|
|
case DeviceRequest | USB_REQ_GET_CONFIGURATION:
|
|
data[0] = 1;
|
|
ret = 1;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
|
|
ret = 0;
|
|
break;
|
|
case DeviceRequest | USB_REQ_GET_INTERFACE:
|
|
data[0] = 0;
|
|
ret = 1;
|
|
break;
|
|
case DeviceOutRequest | USB_REQ_SET_INTERFACE:
|
|
ret = 0;
|
|
break;
|
|
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
|
|
if (value == 0 && index != 0x81) { /* clear ep halt */
|
|
goto fail;
|
|
}
|
|
ret = 0;
|
|
break;
|
|
/* Class specific requests. */
|
|
case MassStorageReset:
|
|
/* Reset state ready for the next CBW. */
|
|
s->mode = USB_MSDM_CBW;
|
|
ret = 0;
|
|
break;
|
|
case GetMaxLun:
|
|
data[0] = 0;
|
|
ret = 1;
|
|
break;
|
|
default:
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
struct usb_msd_cbw {
|
|
uint32_t sig;
|
|
uint32_t tag;
|
|
uint32_t data_len;
|
|
uint8_t flags;
|
|
uint8_t lun;
|
|
uint8_t cmd_len;
|
|
uint8_t cmd[16];
|
|
};
|
|
|
|
struct usb_msd_csw {
|
|
uint32_t sig;
|
|
uint32_t tag;
|
|
uint32_t residue;
|
|
uint8_t status;
|
|
};
|
|
|
|
static int usb_msd_handle_data(USBDevice *dev, int pid, uint8_t devep,
|
|
uint8_t *data, int len)
|
|
{
|
|
MSDState *s = (MSDState *)dev;
|
|
int ret = 0;
|
|
struct usb_msd_cbw cbw;
|
|
struct usb_msd_csw csw;
|
|
|
|
switch (pid) {
|
|
case USB_TOKEN_OUT:
|
|
if (devep != 2)
|
|
goto fail;
|
|
|
|
switch (s->mode) {
|
|
case USB_MSDM_CBW:
|
|
if (len != 31) {
|
|
fprintf(stderr, "usb-msd: Bad CBW size");
|
|
goto fail;
|
|
}
|
|
memcpy(&cbw, data, 31);
|
|
if (le32_to_cpu(cbw.sig) != 0x43425355) {
|
|
fprintf(stderr, "usb-msd: Bad signature %08x\n",
|
|
le32_to_cpu(cbw.sig));
|
|
goto fail;
|
|
}
|
|
DPRINTF("Command on LUN %d\n", cbw.lun);
|
|
if (cbw.lun != 0) {
|
|
fprintf(stderr, "usb-msd: Bad LUN %d\n", cbw.lun);
|
|
goto fail;
|
|
}
|
|
s->tag = le32_to_cpu(cbw.tag);
|
|
s->data_len = le32_to_cpu(cbw.data_len);
|
|
if (s->data_len == 0) {
|
|
s->mode = USB_MSDM_CSW;
|
|
} else if (cbw.flags & 0x80) {
|
|
s->mode = USB_MSDM_DATAIN;
|
|
} else {
|
|
s->mode = USB_MSDM_DATAOUT;
|
|
}
|
|
DPRINTF("Command tag 0x%x flags %08x len %d data %d\n",
|
|
s->tag, cbw.flags, cbw.cmd_len, s->data_len);
|
|
scsi_send_command(s->scsi_dev, s->tag, cbw.cmd, 0);
|
|
ret = len;
|
|
break;
|
|
|
|
case USB_MSDM_DATAOUT:
|
|
DPRINTF("Data out %d/%d\n", len, s->data_len);
|
|
if (len > s->data_len)
|
|
goto fail;
|
|
|
|
if (scsi_write_data(s->scsi_dev, data, len))
|
|
goto fail;
|
|
|
|
s->data_len -= len;
|
|
if (s->data_len == 0)
|
|
s->mode = USB_MSDM_CSW;
|
|
ret = len;
|
|
break;
|
|
|
|
default:
|
|
DPRINTF("Unexpected write (len %d)\n", len);
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
case USB_TOKEN_IN:
|
|
if (devep != 1)
|
|
goto fail;
|
|
|
|
switch (s->mode) {
|
|
case USB_MSDM_CSW:
|
|
DPRINTF("Command status %d tag 0x%x, len %d\n",
|
|
s->result, s->tag, len);
|
|
if (len < 13)
|
|
goto fail;
|
|
|
|
csw.sig = cpu_to_le32(0x53425355);
|
|
csw.tag = cpu_to_le32(s->tag);
|
|
csw.residue = 0;
|
|
csw.status = s->result;
|
|
memcpy(data, &csw, 13);
|
|
ret = 13;
|
|
s->mode = USB_MSDM_CBW;
|
|
break;
|
|
|
|
case USB_MSDM_DATAIN:
|
|
DPRINTF("Data in %d/%d\n", len, s->data_len);
|
|
if (len > s->data_len)
|
|
len = s->data_len;
|
|
|
|
if (scsi_read_data(s->scsi_dev, data, len))
|
|
goto fail;
|
|
|
|
s->data_len -= len;
|
|
if (s->data_len == 0)
|
|
s->mode = USB_MSDM_CSW;
|
|
ret = len;
|
|
break;
|
|
|
|
default:
|
|
DPRINTF("Unexpected read (len %d)\n", len);
|
|
goto fail;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
DPRINTF("Bad token\n");
|
|
fail:
|
|
ret = USB_RET_STALL;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
USBDevice *usb_msd_init(const char *filename)
|
|
{
|
|
MSDState *s;
|
|
BlockDriverState *bdrv;
|
|
|
|
s = qemu_mallocz(sizeof(MSDState));
|
|
if (!s)
|
|
return NULL;
|
|
|
|
bdrv = bdrv_new("usb");
|
|
bdrv_open(bdrv, filename, 0);
|
|
|
|
s->dev.speed = USB_SPEED_FULL;
|
|
s->dev.handle_packet = usb_generic_handle_packet;
|
|
|
|
s->dev.handle_reset = usb_msd_handle_reset;
|
|
s->dev.handle_control = usb_msd_handle_control;
|
|
s->dev.handle_data = usb_msd_handle_data;
|
|
|
|
s->scsi_dev = scsi_disk_init(bdrv, usb_msd_command_complete, s);
|
|
usb_msd_handle_reset((USBDevice *)s, 0);
|
|
return (USBDevice *)s;
|
|
}
|