diff options
Diffstat (limited to 'qemu/roms/seabios/src/hw/usb-msc.c')
| -rw-r--r-- | qemu/roms/seabios/src/hw/usb-msc.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/hw/usb-msc.c b/qemu/roms/seabios/src/hw/usb-msc.c new file mode 100644 index 000000000..d90319f51 --- /dev/null +++ b/qemu/roms/seabios/src/hw/usb-msc.c @@ -0,0 +1,220 @@ +// Code for handling USB Mass Storage Controller devices. +// +// Copyright (C) 2010 Kevin O'Connor <kevin@koconnor.net> +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#include "biosvar.h" // GET_GLOBALFLAT +#include "block.h" // DTYPE_USB +#include "blockcmd.h" // cdb_read +#include "config.h" // CONFIG_USB_MSC +#include "malloc.h" // free +#include "output.h" // dprintf +#include "std/disk.h" // DISK_RET_SUCCESS +#include "string.h" // memset +#include "usb.h" // struct usb_s +#include "usb-msc.h" // usb_msc_setup +#include "util.h" // bootprio_find_usb + +struct usbdrive_s { + struct drive_s drive; + struct usb_pipe *bulkin, *bulkout; + int lun; +}; + + +/**************************************************************** + * Bulk-only drive command processing + ****************************************************************/ + +#define USB_CDB_SIZE 12 + +#define CBW_SIGNATURE 0x43425355 // USBC + +struct cbw_s { + u32 dCBWSignature; + u32 dCBWTag; + u32 dCBWDataTransferLength; + u8 bmCBWFlags; + u8 bCBWLUN; + u8 bCBWCBLength; + u8 CBWCB[16]; +} PACKED; + +#define CSW_SIGNATURE 0x53425355 // USBS + +struct csw_s { + u32 dCSWSignature; + u32 dCSWTag; + u32 dCSWDataResidue; + u8 bCSWStatus; +} PACKED; + +static int +usb_msc_send(struct usbdrive_s *udrive_gf, int dir, void *buf, u32 bytes) +{ + struct usb_pipe *pipe; + if (dir == USB_DIR_OUT) + pipe = GET_GLOBALFLAT(udrive_gf->bulkout); + else + pipe = GET_GLOBALFLAT(udrive_gf->bulkin); + return usb_send_bulk(pipe, dir, buf, bytes); +} + +// Low-level usb command transmit function. +int +usb_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize) +{ + if (!CONFIG_USB_MSC) + return 0; + + dprintf(16, "usb_cmd_data id=%p write=%d count=%d bs=%d buf=%p\n" + , op->drive_gf, 0, op->count, blocksize, op->buf_fl); + struct usbdrive_s *udrive_gf = container_of( + op->drive_gf, struct usbdrive_s, drive); + + // Setup command block wrapper. + u32 bytes = blocksize * op->count; + struct cbw_s cbw; + memset(&cbw, 0, sizeof(cbw)); + memcpy(cbw.CBWCB, cdbcmd, USB_CDB_SIZE); + cbw.dCBWSignature = CBW_SIGNATURE; + cbw.dCBWTag = 999; // XXX + cbw.dCBWDataTransferLength = bytes; + cbw.bmCBWFlags = cdb_is_read(cdbcmd, blocksize) ? USB_DIR_IN : USB_DIR_OUT; + cbw.bCBWLUN = GET_GLOBALFLAT(udrive_gf->lun); + cbw.bCBWCBLength = USB_CDB_SIZE; + + // Transfer cbw to device. + int ret = usb_msc_send(udrive_gf, USB_DIR_OUT + , MAKE_FLATPTR(GET_SEG(SS), &cbw), sizeof(cbw)); + if (ret) + goto fail; + + // Transfer data to/from device. + if (bytes) { + ret = usb_msc_send(udrive_gf, cbw.bmCBWFlags, op->buf_fl, bytes); + if (ret) + goto fail; + } + + // Transfer csw info. + struct csw_s csw; + ret = usb_msc_send(udrive_gf, USB_DIR_IN + , MAKE_FLATPTR(GET_SEG(SS), &csw), sizeof(csw)); + if (ret) + goto fail; + + if (!csw.bCSWStatus) + return DISK_RET_SUCCESS; + if (csw.bCSWStatus == 2) + goto fail; + + if (blocksize) + op->count -= csw.dCSWDataResidue / blocksize; + return DISK_RET_EBADTRACK; + +fail: + // XXX - reset connection + dprintf(1, "USB transmission failed\n"); + return DISK_RET_EBADTRACK; +} + +static int +usb_msc_maxlun(struct usb_pipe *pipe) +{ + struct usb_ctrlrequest req; + req.bRequestType = USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE; + req.bRequest = 0xfe; + req.wValue = 0; + req.wIndex = 0; + req.wLength = 1; + unsigned char maxlun; + int ret = usb_send_default_control(pipe, &req, &maxlun); + if (ret) + return 0; + return maxlun; +} + +static int +usb_msc_lun_setup(struct usb_pipe *inpipe, struct usb_pipe *outpipe, + struct usbdevice_s *usbdev, int lun) +{ + // Allocate drive structure. + struct usbdrive_s *drive = malloc_fseg(sizeof(*drive)); + if (!drive) { + warn_noalloc(); + return -1; + } + memset(drive, 0, sizeof(*drive)); + if (usb_32bit_pipe(inpipe)) + drive->drive.type = DTYPE_USB_32; + else + drive->drive.type = DTYPE_USB; + drive->bulkin = inpipe; + drive->bulkout = outpipe; + drive->lun = lun; + + int prio = bootprio_find_usb(usbdev, lun); + int ret = scsi_drive_setup(&drive->drive, "USB MSC", prio); + if (ret) { + dprintf(1, "Unable to configure USB MSC drive.\n"); + free(drive); + return -1; + } + return 0; +} + +/**************************************************************** + * Setup + ****************************************************************/ + +// Configure a usb msc device. +int +usb_msc_setup(struct usbdevice_s *usbdev) +{ + if (!CONFIG_USB_MSC) + return -1; + + // Verify right kind of device + struct usb_interface_descriptor *iface = usbdev->iface; + if ((iface->bInterfaceSubClass != US_SC_SCSI && + iface->bInterfaceSubClass != US_SC_ATAPI_8070 && + iface->bInterfaceSubClass != US_SC_ATAPI_8020) + || iface->bInterfaceProtocol != US_PR_BULK) { + dprintf(1, "Unsupported MSC USB device (subclass=%02x proto=%02x)\n" + , iface->bInterfaceSubClass, iface->bInterfaceProtocol); + return -1; + } + + // Find bulk in and bulk out endpoints. + struct usb_pipe *inpipe = NULL, *outpipe = NULL; + struct usb_endpoint_descriptor *indesc = usb_find_desc( + usbdev, USB_ENDPOINT_XFER_BULK, USB_DIR_IN); + struct usb_endpoint_descriptor *outdesc = usb_find_desc( + usbdev, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT); + if (!indesc || !outdesc) + goto fail; + inpipe = usb_alloc_pipe(usbdev, indesc); + outpipe = usb_alloc_pipe(usbdev, outdesc); + if (!inpipe || !outpipe) + goto fail; + + int maxlun = usb_msc_maxlun(usbdev->defpipe); + int lun, pipesused = 0; + for (lun = 0; lun < maxlun + 1; lun++) { + int ret = usb_msc_lun_setup(inpipe, outpipe, usbdev, lun); + if (!ret) + pipesused = 1; + } + + if (!pipesused) + goto fail; + + return 0; +fail: + dprintf(1, "Unable to configure USB MSC device.\n"); + usb_free_pipe(usbdev, inpipe); + usb_free_pipe(usbdev, outpipe); + return -1; +} |