1 // Code for handling USB Mass Storage Controller devices.
3 // Copyright (C) 2010 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU LGPLv3 license.
7 #include "util.h" // dprintf
8 #include "config.h" // CONFIG_USB_MSC
9 #include "usb-msc.h" // usb_msc_init
10 #include "usb.h" // struct usb_s
11 #include "biosvar.h" // GET_GLOBAL
12 #include "blockcmd.h" // cdb_read
13 #include "disk.h" // DTYPE_USB
14 #include "boot.h" // boot_add_hd
18 struct usb_pipe *bulkin, *bulkout;
22 /****************************************************************
23 * Bulk-only drive command processing
24 ****************************************************************/
26 #define USB_CDB_SIZE 12
28 #define CBW_SIGNATURE 0x43425355 // USBC
33 u32 dCBWDataTransferLength;
40 #define CSW_SIGNATURE 0x53425355 // USBS
49 // Low-level usb command transmit function.
51 usb_cmd_data(struct disk_op_s *op, void *cdbcmd, u16 blocksize)
56 dprintf(16, "usb_cmd_data id=%p write=%d count=%d bs=%d buf=%p\n"
57 , op->drive_g, 0, op->count, blocksize, op->buf_fl);
58 struct usbdrive_s *udrive_g = container_of(
59 op->drive_g, struct usbdrive_s, drive);
60 struct usb_pipe *bulkin = GET_GLOBAL(udrive_g->bulkin);
61 struct usb_pipe *bulkout = GET_GLOBAL(udrive_g->bulkout);
63 // Setup command block wrapper.
64 u32 bytes = blocksize * op->count;
66 memset(&cbw, 0, sizeof(cbw));
67 cbw.dCBWSignature = CBW_SIGNATURE;
68 cbw.dCBWTag = 999; // XXX
69 cbw.dCBWDataTransferLength = bytes;
70 cbw.bmCBWFlags = USB_DIR_IN; // XXX
71 cbw.bCBWLUN = 0; // XXX
72 cbw.bCBWCBLength = USB_CDB_SIZE;
73 memcpy(cbw.CBWCB, cdbcmd, USB_CDB_SIZE);
75 // Transfer cbw to device.
76 int ret = usb_send_bulk(bulkout, USB_DIR_OUT
77 , MAKE_FLATPTR(GET_SEG(SS), &cbw), sizeof(cbw));
81 // Transfer data from device.
82 ret = usb_send_bulk(bulkin, USB_DIR_IN, op->buf_fl, bytes);
88 ret = usb_send_bulk(bulkin, USB_DIR_IN
89 , MAKE_FLATPTR(GET_SEG(SS), &csw), sizeof(csw));
94 return DISK_RET_SUCCESS;
95 if (csw.bCSWStatus == 2)
98 op->count -= csw.dCSWDataResidue / blocksize;
99 return DISK_RET_EBADTRACK;
102 // XXX - reset connection
103 dprintf(1, "USB transmission failed\n");
105 return DISK_RET_EBADTRACK;
109 /****************************************************************
111 ****************************************************************/
113 // 16bit command demuxer for ATAPI cdroms.
115 process_usb_op(struct disk_op_s *op)
119 switch (op->command) {
124 return DISK_RET_EWRITEPROTECT;
129 return DISK_RET_SUCCESS;
132 return DISK_RET_EPARAM;
137 /****************************************************************
139 ****************************************************************/
142 setup_drive_cdrom(struct disk_op_s *op, char *desc)
144 op->drive_g->blksize = CDROM_SECTOR_SIZE;
145 op->drive_g->sectors = (u64)-1;
146 boot_add_cd(op->drive_g, desc, -1);
151 setup_drive_hd(struct disk_op_s *op, char *desc)
153 struct cdbres_read_capacity info;
154 int ret = cdb_read_capacity(op, &info);
157 // XXX - retry for some timeout?
159 u32 blksize = ntohl(info.blksize), sectors = ntohl(info.sectors);
160 if (blksize != DISK_SECTOR_SIZE) {
161 if (blksize == CDROM_SECTOR_SIZE)
162 return setup_drive_cdrom(op, desc);
163 dprintf(1, "Unsupported USB MSC block size %d\n", blksize);
166 op->drive_g->blksize = blksize;
167 op->drive_g->sectors = sectors;
168 dprintf(1, "USB MSC blksize=%d sectors=%d\n", blksize, sectors);
170 // Register with bcv system.
171 boot_add_hd(op->drive_g, desc, -1);
176 // Configure a usb msc device.
178 usb_msc_init(struct usb_pipe *pipe
179 , struct usb_interface_descriptor *iface, int imax)
184 // Verify right kind of device
185 if ((iface->bInterfaceSubClass != US_SC_SCSI &&
186 iface->bInterfaceSubClass != US_SC_ATAPI_8070 &&
187 iface->bInterfaceSubClass != US_SC_ATAPI_8020)
188 || iface->bInterfaceProtocol != US_PR_BULK) {
189 dprintf(1, "Unsupported MSC USB device (subclass=%02x proto=%02x)\n"
190 , iface->bInterfaceSubClass, iface->bInterfaceProtocol);
194 // Allocate drive structure.
195 struct usbdrive_s *udrive_g = malloc_fseg(sizeof(*udrive_g));
200 memset(udrive_g, 0, sizeof(*udrive_g));
201 udrive_g->drive.type = DTYPE_USB;
203 // Find bulk in and bulk out endpoints.
204 struct usb_endpoint_descriptor *indesc = findEndPointDesc(
205 iface, imax, USB_ENDPOINT_XFER_BULK, USB_DIR_IN);
206 struct usb_endpoint_descriptor *outdesc = findEndPointDesc(
207 iface, imax, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT);
208 if (!indesc || !outdesc)
210 udrive_g->bulkin = alloc_bulk_pipe(pipe, indesc);
211 udrive_g->bulkout = alloc_bulk_pipe(pipe, outdesc);
212 if (!udrive_g->bulkin || !udrive_g->bulkout)
215 // Validate drive and find block size and sector count.
216 struct disk_op_s dop;
217 memset(&dop, 0, sizeof(dop));
218 dop.drive_g = &udrive_g->drive;
219 struct cdbres_inquiry data;
220 int ret = cdb_get_inquiry(&dop, &data);
223 char vendor[sizeof(data.vendor)+1], product[sizeof(data.product)+1];
224 char rev[sizeof(data.rev)+1];
225 int pdt = data.pdt & 0x1f;
226 int removable = !!(data.removable & 0x80);
227 dprintf(1, "USB MSC vendor='%s' product='%s' rev='%s'"
228 " type=%d removable=%d\n"
229 , strtcpy(vendor, data.vendor, sizeof(vendor))
230 , strtcpy(product, data.product, sizeof(product))
231 , strtcpy(rev, data.rev, sizeof(rev))
233 udrive_g->drive.removable = removable;
235 if (pdt == USB_MSC_TYPE_CDROM) {
236 char *desc = znprintf(MAXDESCSIZE, "DVD/CD [USB Drive %s %s %s]"
237 , vendor, product, rev);
238 ret = setup_drive_cdrom(&dop, desc);
240 char *desc = znprintf(MAXDESCSIZE, "USB Drive %s %s %s"
241 , vendor, product, rev);
242 ret = setup_drive_hd(&dop, desc);
249 dprintf(1, "Unable to configure USB MSC device.\n");