MAINTAINERS: Add myself as the FPGA maintainer
[oweals/u-boot.git] / common / usb_storage.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Most of this source has been derived from the Linux USB
4  * project:
5  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
6  *   (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
7  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
8  *   (c) 2000 Yggdrasil Computing, Inc.
9  *
10  *
11  * Adapted for U-Boot:
12  *   (C) Copyright 2001 Denis Peter, MPL AG Switzerland
13  * Driver model conversion:
14  *   (C) Copyright 2015 Google, Inc
15  *
16  * For BBB support (C) Copyright 2003
17  * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
18  *
19  * BBB support based on /sys/dev/usb/umass.c from
20  * FreeBSD.
21  */
22
23 /* Note:
24  * Currently only the CBI transport protocoll has been implemented, and it
25  * is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
26  * transport protocoll may work as well.
27  */
28 /*
29  * New Note:
30  * Support for USB Mass Storage Devices (BBB) has been added. It has
31  * only been tested with USB memory sticks.
32  */
33
34
35 #include <common.h>
36 #include <command.h>
37 #include <dm.h>
38 #include <errno.h>
39 #include <inttypes.h>
40 #include <mapmem.h>
41 #include <memalign.h>
42 #include <asm/byteorder.h>
43 #include <asm/processor.h>
44 #include <dm/device-internal.h>
45 #include <dm/lists.h>
46
47 #include <part.h>
48 #include <usb.h>
49
50 #undef BBB_COMDAT_TRACE
51 #undef BBB_XPORT_TRACE
52
53 #include <scsi.h>
54 /* direction table -- this indicates the direction of the data
55  * transfer for each command code -- a 1 indicates input
56  */
57 static const unsigned char us_direction[256/8] = {
58         0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
59         0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
60         0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
61         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
62 };
63 #define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
64
65 static struct scsi_cmd usb_ccb __aligned(ARCH_DMA_MINALIGN);
66 static __u32 CBWTag;
67
68 static int usb_max_devs; /* number of highest available usb device */
69
70 #ifndef CONFIG_BLK
71 static struct blk_desc usb_dev_desc[USB_MAX_STOR_DEV];
72 #endif
73
74 struct us_data;
75 typedef int (*trans_cmnd)(struct scsi_cmd *cb, struct us_data *data);
76 typedef int (*trans_reset)(struct us_data *data);
77
78 struct us_data {
79         struct usb_device *pusb_dev;     /* this usb_device */
80
81         unsigned int    flags;                  /* from filter initially */
82 #       define USB_READY        (1 << 0)
83         unsigned char   ifnum;                  /* interface number */
84         unsigned char   ep_in;                  /* in endpoint */
85         unsigned char   ep_out;                 /* out ....... */
86         unsigned char   ep_int;                 /* interrupt . */
87         unsigned char   subclass;               /* as in overview */
88         unsigned char   protocol;               /* .............. */
89         unsigned char   attention_done;         /* force attn on first cmd */
90         unsigned short  ip_data;                /* interrupt data */
91         int             action;                 /* what to do */
92         int             ip_wanted;              /* needed */
93         int             *irq_handle;            /* for USB int requests */
94         unsigned int    irqpipe;                /* pipe for release_irq */
95         unsigned char   irqmaxp;                /* max packed for irq Pipe */
96         unsigned char   irqinterval;            /* Intervall for IRQ Pipe */
97         struct scsi_cmd *srb;                   /* current srb */
98         trans_reset     transport_reset;        /* reset routine */
99         trans_cmnd      transport;              /* transport routine */
100         unsigned short  max_xfer_blk;           /* maximum transfer blocks */
101 };
102
103 #ifndef CONFIG_BLK
104 static struct us_data usb_stor[USB_MAX_STOR_DEV];
105 #endif
106
107 #define USB_STOR_TRANSPORT_GOOD    0
108 #define USB_STOR_TRANSPORT_FAILED -1
109 #define USB_STOR_TRANSPORT_ERROR  -2
110
111 int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
112                       struct blk_desc *dev_desc);
113 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
114                       struct us_data *ss);
115 #ifdef CONFIG_BLK
116 static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
117                                    lbaint_t blkcnt, void *buffer);
118 static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
119                                     lbaint_t blkcnt, const void *buffer);
120 #else
121 static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
122                                    lbaint_t blkcnt, void *buffer);
123 static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
124                                     lbaint_t blkcnt, const void *buffer);
125 #endif
126 void uhci_show_temp_int_td(void);
127
128 static void usb_show_progress(void)
129 {
130         debug(".");
131 }
132
133 /*******************************************************************************
134  * show info on storage devices; 'usb start/init' must be invoked earlier
135  * as we only retrieve structures populated during devices initialization
136  */
137 int usb_stor_info(void)
138 {
139         int count = 0;
140 #ifdef CONFIG_BLK
141         struct udevice *dev;
142
143         for (blk_first_device(IF_TYPE_USB, &dev);
144              dev;
145              blk_next_device(&dev)) {
146                 struct blk_desc *desc = dev_get_uclass_platdata(dev);
147
148                 printf("  Device %d: ", desc->devnum);
149                 dev_print(desc);
150                 count++;
151         }
152 #else
153         int i;
154
155         if (usb_max_devs > 0) {
156                 for (i = 0; i < usb_max_devs; i++) {
157                         printf("  Device %d: ", i);
158                         dev_print(&usb_dev_desc[i]);
159                 }
160                 return 0;
161         }
162 #endif
163         if (!count) {
164                 printf("No storage devices, perhaps not 'usb start'ed..?\n");
165                 return 1;
166         }
167
168         return 0;
169 }
170
171 static unsigned int usb_get_max_lun(struct us_data *us)
172 {
173         int len;
174         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
175         len = usb_control_msg(us->pusb_dev,
176                               usb_rcvctrlpipe(us->pusb_dev, 0),
177                               US_BBB_GET_MAX_LUN,
178                               USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
179                               0, us->ifnum,
180                               result, sizeof(char),
181                               USB_CNTL_TIMEOUT * 5);
182         debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
183         return (len > 0) ? *result : 0;
184 }
185
186 static int usb_stor_probe_device(struct usb_device *udev)
187 {
188         int lun, max_lun;
189
190 #ifdef CONFIG_BLK
191         struct us_data *data;
192         int ret;
193 #else
194         int start;
195
196         if (udev == NULL)
197                 return -ENOENT; /* no more devices available */
198 #endif
199
200         debug("\n\nProbing for storage\n");
201 #ifdef CONFIG_BLK
202         /*
203          * We store the us_data in the mass storage device's platdata. It
204          * is shared by all LUNs (block devices) attached to this mass storage
205          * device.
206          */
207         data = dev_get_platdata(udev->dev);
208         if (!usb_storage_probe(udev, 0, data))
209                 return 0;
210         max_lun = usb_get_max_lun(data);
211         for (lun = 0; lun <= max_lun; lun++) {
212                 struct blk_desc *blkdev;
213                 struct udevice *dev;
214                 char str[10];
215
216                 snprintf(str, sizeof(str), "lun%d", lun);
217                 ret = blk_create_devicef(udev->dev, "usb_storage_blk", str,
218                                          IF_TYPE_USB, usb_max_devs, 512, 0,
219                                          &dev);
220                 if (ret) {
221                         debug("Cannot bind driver\n");
222                         return ret;
223                 }
224
225                 blkdev = dev_get_uclass_platdata(dev);
226                 blkdev->target = 0xff;
227                 blkdev->lun = lun;
228
229                 ret = usb_stor_get_info(udev, data, blkdev);
230                 if (ret == 1)
231                         ret = blk_prepare_device(dev);
232                 if (!ret) {
233                         usb_max_devs++;
234                         debug("%s: Found device %p\n", __func__, udev);
235                 } else {
236                         debug("usb_stor_get_info: Invalid device\n");
237                         ret = device_unbind(dev);
238                         if (ret)
239                                 return ret;
240                 }
241         }
242 #else
243         /* We don't have space to even probe if we hit the maximum */
244         if (usb_max_devs == USB_MAX_STOR_DEV) {
245                 printf("max USB Storage Device reached: %d stopping\n",
246                        usb_max_devs);
247                 return -ENOSPC;
248         }
249
250         if (!usb_storage_probe(udev, 0, &usb_stor[usb_max_devs]))
251                 return 0;
252
253         /*
254          * OK, it's a storage device.  Iterate over its LUNs and populate
255          * usb_dev_desc'
256          */
257         start = usb_max_devs;
258
259         max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
260         for (lun = 0; lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
261              lun++) {
262                 struct blk_desc *blkdev;
263
264                 blkdev = &usb_dev_desc[usb_max_devs];
265                 memset(blkdev, '\0', sizeof(struct blk_desc));
266                 blkdev->if_type = IF_TYPE_USB;
267                 blkdev->devnum = usb_max_devs;
268                 blkdev->part_type = PART_TYPE_UNKNOWN;
269                 blkdev->target = 0xff;
270                 blkdev->type = DEV_TYPE_UNKNOWN;
271                 blkdev->block_read = usb_stor_read;
272                 blkdev->block_write = usb_stor_write;
273                 blkdev->lun = lun;
274                 blkdev->priv = udev;
275
276                 if (usb_stor_get_info(udev, &usb_stor[start],
277                                       &usb_dev_desc[usb_max_devs]) == 1) {
278                         debug("partype: %d\n", blkdev->part_type);
279                         part_init(blkdev);
280                         debug("partype: %d\n", blkdev->part_type);
281                         usb_max_devs++;
282                         debug("%s: Found device %p\n", __func__, udev);
283                 }
284         }
285 #endif
286
287         return 0;
288 }
289
290 void usb_stor_reset(void)
291 {
292         usb_max_devs = 0;
293 }
294
295 /*******************************************************************************
296  * scan the usb and reports device info
297  * to the user if mode = 1
298  * returns current device or -1 if no
299  */
300 int usb_stor_scan(int mode)
301 {
302         if (mode == 1)
303                 printf("       scanning usb for storage devices... ");
304
305 #ifndef CONFIG_DM_USB
306         unsigned char i;
307
308         usb_disable_asynch(1); /* asynch transfer not allowed */
309
310         usb_stor_reset();
311         for (i = 0; i < USB_MAX_DEVICE; i++) {
312                 struct usb_device *dev;
313
314                 dev = usb_get_dev_index(i); /* get device */
315                 debug("i=%d\n", i);
316                 if (usb_stor_probe_device(dev))
317                         break;
318         } /* for */
319
320         usb_disable_asynch(0); /* asynch transfer allowed */
321 #endif
322         printf("%d Storage Device(s) found\n", usb_max_devs);
323         if (usb_max_devs > 0)
324                 return 0;
325         return -1;
326 }
327
328 static int usb_stor_irq(struct usb_device *dev)
329 {
330         struct us_data *us;
331         us = (struct us_data *)dev->privptr;
332
333         if (us->ip_wanted)
334                 us->ip_wanted = 0;
335         return 0;
336 }
337
338
339 #ifdef  DEBUG
340
341 static void usb_show_srb(struct scsi_cmd *pccb)
342 {
343         int i;
344         printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
345         for (i = 0; i < 12; i++)
346                 printf("%02X ", pccb->cmd[i]);
347         printf("\n");
348 }
349
350 static void display_int_status(unsigned long tmp)
351 {
352         printf("Status: %s %s %s %s %s %s %s\n",
353                 (tmp & USB_ST_ACTIVE) ? "Active" : "",
354                 (tmp & USB_ST_STALLED) ? "Stalled" : "",
355                 (tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
356                 (tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
357                 (tmp & USB_ST_NAK_REC) ? "NAKed" : "",
358                 (tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
359                 (tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
360 }
361 #endif
362 /***********************************************************************
363  * Data transfer routines
364  ***********************************************************************/
365
366 static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
367 {
368         int max_size;
369         int this_xfer;
370         int result;
371         int partial;
372         int maxtry;
373         int stat;
374
375         /* determine the maximum packet size for these transfers */
376         max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
377
378         /* while we have data left to transfer */
379         while (length) {
380
381                 /* calculate how long this will be -- maximum or a remainder */
382                 this_xfer = length > max_size ? max_size : length;
383                 length -= this_xfer;
384
385                 /* setup the retry counter */
386                 maxtry = 10;
387
388                 /* set up the transfer loop */
389                 do {
390                         /* transfer the data */
391                         debug("Bulk xfer 0x%lx(%d) try #%d\n",
392                               (ulong)map_to_sysmem(buf), this_xfer,
393                               11 - maxtry);
394                         result = usb_bulk_msg(us->pusb_dev, pipe, buf,
395                                               this_xfer, &partial,
396                                               USB_CNTL_TIMEOUT * 5);
397                         debug("bulk_msg returned %d xferred %d/%d\n",
398                               result, partial, this_xfer);
399                         if (us->pusb_dev->status != 0) {
400                                 /* if we stall, we need to clear it before
401                                  * we go on
402                                  */
403 #ifdef DEBUG
404                                 display_int_status(us->pusb_dev->status);
405 #endif
406                                 if (us->pusb_dev->status & USB_ST_STALLED) {
407                                         debug("stalled ->clearing endpoint" \
408                                               "halt for pipe 0x%x\n", pipe);
409                                         stat = us->pusb_dev->status;
410                                         usb_clear_halt(us->pusb_dev, pipe);
411                                         us->pusb_dev->status = stat;
412                                         if (this_xfer == partial) {
413                                                 debug("bulk transferred" \
414                                                       "with error %lX," \
415                                                       " but data ok\n",
416                                                       us->pusb_dev->status);
417                                                 return 0;
418                                         }
419                                         else
420                                                 return result;
421                                 }
422                                 if (us->pusb_dev->status & USB_ST_NAK_REC) {
423                                         debug("Device NAKed bulk_msg\n");
424                                         return result;
425                                 }
426                                 debug("bulk transferred with error");
427                                 if (this_xfer == partial) {
428                                         debug(" %ld, but data ok\n",
429                                               us->pusb_dev->status);
430                                         return 0;
431                                 }
432                                 /* if our try counter reaches 0, bail out */
433                                         debug(" %ld, data %d\n",
434                                               us->pusb_dev->status, partial);
435                                 if (!maxtry--)
436                                                 return result;
437                         }
438                         /* update to show what data was transferred */
439                         this_xfer -= partial;
440                         buf += partial;
441                         /* continue until this transfer is done */
442                 } while (this_xfer);
443         }
444
445         /* if we get here, we're done and successful */
446         return 0;
447 }
448
449 static int usb_stor_BBB_reset(struct us_data *us)
450 {
451         int result;
452         unsigned int pipe;
453
454         /*
455          * Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
456          *
457          * For Reset Recovery the host shall issue in the following order:
458          * a) a Bulk-Only Mass Storage Reset
459          * b) a Clear Feature HALT to the Bulk-In endpoint
460          * c) a Clear Feature HALT to the Bulk-Out endpoint
461          *
462          * This is done in 3 steps.
463          *
464          * If the reset doesn't succeed, the device should be port reset.
465          *
466          * This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
467          */
468         debug("BBB_reset\n");
469         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
470                                  US_BBB_RESET,
471                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
472                                  0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
473
474         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
475                 debug("RESET:stall\n");
476                 return -1;
477         }
478
479         /* long wait for reset */
480         mdelay(150);
481         debug("BBB_reset result %d: status %lX reset\n",
482               result, us->pusb_dev->status);
483         pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
484         result = usb_clear_halt(us->pusb_dev, pipe);
485         /* long wait for reset */
486         mdelay(150);
487         debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
488               result, us->pusb_dev->status);
489         /* long wait for reset */
490         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
491         result = usb_clear_halt(us->pusb_dev, pipe);
492         mdelay(150);
493         debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
494               result, us->pusb_dev->status);
495         debug("BBB_reset done\n");
496         return 0;
497 }
498
499 /* FIXME: this reset function doesn't really reset the port, and it
500  * should. Actually it should probably do what it's doing here, and
501  * reset the port physically
502  */
503 static int usb_stor_CB_reset(struct us_data *us)
504 {
505         unsigned char cmd[12];
506         int result;
507
508         debug("CB_reset\n");
509         memset(cmd, 0xff, sizeof(cmd));
510         cmd[0] = SCSI_SEND_DIAG;
511         cmd[1] = 4;
512         result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
513                                  US_CBI_ADSC,
514                                  USB_TYPE_CLASS | USB_RECIP_INTERFACE,
515                                  0, us->ifnum, cmd, sizeof(cmd),
516                                  USB_CNTL_TIMEOUT * 5);
517
518         /* long wait for reset */
519         mdelay(1500);
520         debug("CB_reset result %d: status %lX clearing endpoint halt\n",
521               result, us->pusb_dev->status);
522         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
523         usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
524
525         debug("CB_reset done\n");
526         return 0;
527 }
528
529 /*
530  * Set up the command for a BBB device. Note that the actual SCSI
531  * command is copied into cbw.CBWCDB.
532  */
533 static int usb_stor_BBB_comdat(struct scsi_cmd *srb, struct us_data *us)
534 {
535         int result;
536         int actlen;
537         int dir_in;
538         unsigned int pipe;
539         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_cbw, cbw, 1);
540
541         dir_in = US_DIRECTION(srb->cmd[0]);
542
543 #ifdef BBB_COMDAT_TRACE
544         printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
545                 dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
546                 srb->pdata);
547         if (srb->cmdlen) {
548                 for (result = 0; result < srb->cmdlen; result++)
549                         printf("cmd[%d] %#x ", result, srb->cmd[result]);
550                 printf("\n");
551         }
552 #endif
553         /* sanity checks */
554         if (!(srb->cmdlen <= CBWCDBLENGTH)) {
555                 debug("usb_stor_BBB_comdat:cmdlen too large\n");
556                 return -1;
557         }
558
559         /* always OUT to the ep */
560         pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
561
562         cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
563         cbw->dCBWTag = cpu_to_le32(CBWTag++);
564         cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
565         cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
566         cbw->bCBWLUN = srb->lun;
567         cbw->bCDBLength = srb->cmdlen;
568         /* copy the command data into the CBW command data buffer */
569         /* DST SRC LEN!!! */
570
571         memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
572         result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
573                               &actlen, USB_CNTL_TIMEOUT * 5);
574         if (result < 0)
575                 debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
576         return result;
577 }
578
579 /* FIXME: we also need a CBI_command which sets up the completion
580  * interrupt, and waits for it
581  */
582 static int usb_stor_CB_comdat(struct scsi_cmd *srb, struct us_data *us)
583 {
584         int result = 0;
585         int dir_in, retry;
586         unsigned int pipe;
587         unsigned long status;
588
589         retry = 5;
590         dir_in = US_DIRECTION(srb->cmd[0]);
591
592         if (dir_in)
593                 pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
594         else
595                 pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
596
597         while (retry--) {
598                 debug("CBI gets a command: Try %d\n", 5 - retry);
599 #ifdef DEBUG
600                 usb_show_srb(srb);
601 #endif
602                 /* let's send the command via the control pipe */
603                 result = usb_control_msg(us->pusb_dev,
604                                          usb_sndctrlpipe(us->pusb_dev , 0),
605                                          US_CBI_ADSC,
606                                          USB_TYPE_CLASS | USB_RECIP_INTERFACE,
607                                          0, us->ifnum,
608                                          srb->cmd, srb->cmdlen,
609                                          USB_CNTL_TIMEOUT * 5);
610                 debug("CB_transport: control msg returned %d, status %lX\n",
611                       result, us->pusb_dev->status);
612                 /* check the return code for the command */
613                 if (result < 0) {
614                         if (us->pusb_dev->status & USB_ST_STALLED) {
615                                 status = us->pusb_dev->status;
616                                 debug(" stall during command found," \
617                                       " clear pipe\n");
618                                 usb_clear_halt(us->pusb_dev,
619                                               usb_sndctrlpipe(us->pusb_dev, 0));
620                                 us->pusb_dev->status = status;
621                         }
622                         debug(" error during command %02X" \
623                               " Stat = %lX\n", srb->cmd[0],
624                               us->pusb_dev->status);
625                         return result;
626                 }
627                 /* transfer the data payload for this command, if one exists*/
628
629                 debug("CB_transport: control msg returned %d," \
630                       " direction is %s to go 0x%lx\n", result,
631                       dir_in ? "IN" : "OUT", srb->datalen);
632                 if (srb->datalen) {
633                         result = us_one_transfer(us, pipe, (char *)srb->pdata,
634                                                  srb->datalen);
635                         debug("CBI attempted to transfer data," \
636                               " result is %d status %lX, len %d\n",
637                               result, us->pusb_dev->status,
638                                 us->pusb_dev->act_len);
639                         if (!(us->pusb_dev->status & USB_ST_NAK_REC))
640                                 break;
641                 } /* if (srb->datalen) */
642                 else
643                         break;
644         }
645         /* return result */
646
647         return result;
648 }
649
650
651 static int usb_stor_CBI_get_status(struct scsi_cmd *srb, struct us_data *us)
652 {
653         int timeout;
654
655         us->ip_wanted = 1;
656         submit_int_msg(us->pusb_dev, us->irqpipe,
657                         (void *) &us->ip_data, us->irqmaxp, us->irqinterval);
658         timeout = 1000;
659         while (timeout--) {
660                 if (us->ip_wanted == 0)
661                         break;
662                 mdelay(10);
663         }
664         if (us->ip_wanted) {
665                 printf("        Did not get interrupt on CBI\n");
666                 us->ip_wanted = 0;
667                 return USB_STOR_TRANSPORT_ERROR;
668         }
669         debug("Got interrupt data 0x%x, transferred %d status 0x%lX\n",
670               us->ip_data, us->pusb_dev->irq_act_len,
671               us->pusb_dev->irq_status);
672         /* UFI gives us ASC and ASCQ, like a request sense */
673         if (us->subclass == US_SC_UFI) {
674                 if (srb->cmd[0] == SCSI_REQ_SENSE ||
675                     srb->cmd[0] == SCSI_INQUIRY)
676                         return USB_STOR_TRANSPORT_GOOD; /* Good */
677                 else if (us->ip_data)
678                         return USB_STOR_TRANSPORT_FAILED;
679                 else
680                         return USB_STOR_TRANSPORT_GOOD;
681         }
682         /* otherwise, we interpret the data normally */
683         switch (us->ip_data) {
684         case 0x0001:
685                 return USB_STOR_TRANSPORT_GOOD;
686         case 0x0002:
687                 return USB_STOR_TRANSPORT_FAILED;
688         default:
689                 return USB_STOR_TRANSPORT_ERROR;
690         }                       /* switch */
691         return USB_STOR_TRANSPORT_ERROR;
692 }
693
694 #define USB_TRANSPORT_UNKNOWN_RETRY 5
695 #define USB_TRANSPORT_NOT_READY_RETRY 10
696
697 /* clear a stall on an endpoint - special for BBB devices */
698 static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
699 {
700         /* ENDPOINT_HALT = 0, so set value to 0 */
701         return usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
702                                USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0,
703                                endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
704 }
705
706 static int usb_stor_BBB_transport(struct scsi_cmd *srb, struct us_data *us)
707 {
708         int result, retry;
709         int dir_in;
710         int actlen, data_actlen;
711         unsigned int pipe, pipein, pipeout;
712         ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_csw, csw, 1);
713 #ifdef BBB_XPORT_TRACE
714         unsigned char *ptr;
715         int index;
716 #endif
717
718         dir_in = US_DIRECTION(srb->cmd[0]);
719
720         /* COMMAND phase */
721         debug("COMMAND phase\n");
722         result = usb_stor_BBB_comdat(srb, us);
723         if (result < 0) {
724                 debug("failed to send CBW status %ld\n",
725                       us->pusb_dev->status);
726                 usb_stor_BBB_reset(us);
727                 return USB_STOR_TRANSPORT_FAILED;
728         }
729         if (!(us->flags & USB_READY))
730                 mdelay(5);
731         pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
732         pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
733         /* DATA phase + error handling */
734         data_actlen = 0;
735         /* no data, go immediately to the STATUS phase */
736         if (srb->datalen == 0)
737                 goto st;
738         debug("DATA phase\n");
739         if (dir_in)
740                 pipe = pipein;
741         else
742                 pipe = pipeout;
743
744         result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
745                               &data_actlen, USB_CNTL_TIMEOUT * 5);
746         /* special handling of STALL in DATA phase */
747         if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
748                 debug("DATA:stall\n");
749                 /* clear the STALL on the endpoint */
750                 result = usb_stor_BBB_clear_endpt_stall(us,
751                                         dir_in ? us->ep_in : us->ep_out);
752                 if (result >= 0)
753                         /* continue on to STATUS phase */
754                         goto st;
755         }
756         if (result < 0) {
757                 debug("usb_bulk_msg error status %ld\n",
758                       us->pusb_dev->status);
759                 usb_stor_BBB_reset(us);
760                 return USB_STOR_TRANSPORT_FAILED;
761         }
762 #ifdef BBB_XPORT_TRACE
763         for (index = 0; index < data_actlen; index++)
764                 printf("pdata[%d] %#x ", index, srb->pdata[index]);
765         printf("\n");
766 #endif
767         /* STATUS phase + error handling */
768 st:
769         retry = 0;
770 again:
771         debug("STATUS phase\n");
772         result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
773                                 &actlen, USB_CNTL_TIMEOUT*5);
774
775         /* special handling of STALL in STATUS phase */
776         if ((result < 0) && (retry < 1) &&
777             (us->pusb_dev->status & USB_ST_STALLED)) {
778                 debug("STATUS:stall\n");
779                 /* clear the STALL on the endpoint */
780                 result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
781                 if (result >= 0 && (retry++ < 1))
782                         /* do a retry */
783                         goto again;
784         }
785         if (result < 0) {
786                 debug("usb_bulk_msg error status %ld\n",
787                       us->pusb_dev->status);
788                 usb_stor_BBB_reset(us);
789                 return USB_STOR_TRANSPORT_FAILED;
790         }
791 #ifdef BBB_XPORT_TRACE
792         ptr = (unsigned char *)csw;
793         for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
794                 printf("ptr[%d] %#x ", index, ptr[index]);
795         printf("\n");
796 #endif
797         /* misuse pipe to get the residue */
798         pipe = le32_to_cpu(csw->dCSWDataResidue);
799         if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
800                 pipe = srb->datalen - data_actlen;
801         if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
802                 debug("!CSWSIGNATURE\n");
803                 usb_stor_BBB_reset(us);
804                 return USB_STOR_TRANSPORT_FAILED;
805         } else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
806                 debug("!Tag\n");
807                 usb_stor_BBB_reset(us);
808                 return USB_STOR_TRANSPORT_FAILED;
809         } else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
810                 debug(">PHASE\n");
811                 usb_stor_BBB_reset(us);
812                 return USB_STOR_TRANSPORT_FAILED;
813         } else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
814                 debug("=PHASE\n");
815                 usb_stor_BBB_reset(us);
816                 return USB_STOR_TRANSPORT_FAILED;
817         } else if (data_actlen > srb->datalen) {
818                 debug("transferred %dB instead of %ldB\n",
819                       data_actlen, srb->datalen);
820                 return USB_STOR_TRANSPORT_FAILED;
821         } else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
822                 debug("FAILED\n");
823                 return USB_STOR_TRANSPORT_FAILED;
824         }
825
826         return result;
827 }
828
829 static int usb_stor_CB_transport(struct scsi_cmd *srb, struct us_data *us)
830 {
831         int result, status;
832         struct scsi_cmd *psrb;
833         struct scsi_cmd reqsrb;
834         int retry, notready;
835
836         psrb = &reqsrb;
837         status = USB_STOR_TRANSPORT_GOOD;
838         retry = 0;
839         notready = 0;
840         /* issue the command */
841 do_retry:
842         result = usb_stor_CB_comdat(srb, us);
843         debug("command / Data returned %d, status %lX\n",
844               result, us->pusb_dev->status);
845         /* if this is an CBI Protocol, get IRQ */
846         if (us->protocol == US_PR_CBI) {
847                 status = usb_stor_CBI_get_status(srb, us);
848                 /* if the status is error, report it */
849                 if (status == USB_STOR_TRANSPORT_ERROR) {
850                         debug(" USB CBI Command Error\n");
851                         return status;
852                 }
853                 srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
854                 srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
855                 if (!us->ip_data) {
856                         /* if the status is good, report it */
857                         if (status == USB_STOR_TRANSPORT_GOOD) {
858                                 debug(" USB CBI Command Good\n");
859                                 return status;
860                         }
861                 }
862         }
863         /* do we have to issue an auto request? */
864         /* HERE we have to check the result */
865         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
866                 debug("ERROR %lX\n", us->pusb_dev->status);
867                 us->transport_reset(us);
868                 return USB_STOR_TRANSPORT_ERROR;
869         }
870         if ((us->protocol == US_PR_CBI) &&
871             ((srb->cmd[0] == SCSI_REQ_SENSE) ||
872             (srb->cmd[0] == SCSI_INQUIRY))) {
873                 /* do not issue an autorequest after request sense */
874                 debug("No auto request and good\n");
875                 return USB_STOR_TRANSPORT_GOOD;
876         }
877         /* issue an request_sense */
878         memset(&psrb->cmd[0], 0, 12);
879         psrb->cmd[0] = SCSI_REQ_SENSE;
880         psrb->cmd[1] = srb->lun << 5;
881         psrb->cmd[4] = 18;
882         psrb->datalen = 18;
883         psrb->pdata = &srb->sense_buf[0];
884         psrb->cmdlen = 12;
885         /* issue the command */
886         result = usb_stor_CB_comdat(psrb, us);
887         debug("auto request returned %d\n", result);
888         /* if this is an CBI Protocol, get IRQ */
889         if (us->protocol == US_PR_CBI)
890                 status = usb_stor_CBI_get_status(psrb, us);
891
892         if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
893                 debug(" AUTO REQUEST ERROR %ld\n",
894                       us->pusb_dev->status);
895                 return USB_STOR_TRANSPORT_ERROR;
896         }
897         debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
898               srb->sense_buf[0], srb->sense_buf[2],
899               srb->sense_buf[12], srb->sense_buf[13]);
900         /* Check the auto request result */
901         if ((srb->sense_buf[2] == 0) &&
902             (srb->sense_buf[12] == 0) &&
903             (srb->sense_buf[13] == 0)) {
904                 /* ok, no sense */
905                 return USB_STOR_TRANSPORT_GOOD;
906         }
907
908         /* Check the auto request result */
909         switch (srb->sense_buf[2]) {
910         case 0x01:
911                 /* Recovered Error */
912                 return USB_STOR_TRANSPORT_GOOD;
913                 break;
914         case 0x02:
915                 /* Not Ready */
916                 if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
917                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
918                                " 0x%02X (NOT READY)\n", srb->cmd[0],
919                                 srb->sense_buf[0], srb->sense_buf[2],
920                                 srb->sense_buf[12], srb->sense_buf[13]);
921                         return USB_STOR_TRANSPORT_FAILED;
922                 } else {
923                         mdelay(100);
924                         goto do_retry;
925                 }
926                 break;
927         default:
928                 if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
929                         printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
930                                " 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
931                                 srb->sense_buf[2], srb->sense_buf[12],
932                                 srb->sense_buf[13]);
933                         return USB_STOR_TRANSPORT_FAILED;
934                 } else
935                         goto do_retry;
936                 break;
937         }
938         return USB_STOR_TRANSPORT_FAILED;
939 }
940
941 static void usb_stor_set_max_xfer_blk(struct usb_device *udev,
942                                       struct us_data *us)
943 {
944         unsigned short blk;
945         size_t __maybe_unused size;
946         int __maybe_unused ret;
947
948 #ifndef CONFIG_DM_USB
949 #ifdef CONFIG_USB_EHCI_HCD
950         /*
951          * The U-Boot EHCI driver can handle any transfer length as long as
952          * there is enough free heap space left, but the SCSI READ(10) and
953          * WRITE(10) commands are limited to 65535 blocks.
954          */
955         blk = USHRT_MAX;
956 #else
957         blk = 20;
958 #endif
959 #else
960         ret = usb_get_max_xfer_size(udev, (size_t *)&size);
961         if (ret < 0) {
962                 /* unimplemented, let's use default 20 */
963                 blk = 20;
964         } else {
965                 if (size > USHRT_MAX * 512)
966                         size = USHRT_MAX * 512;
967                 blk = size / 512;
968         }
969 #endif
970
971         us->max_xfer_blk = blk;
972 }
973
974 static int usb_inquiry(struct scsi_cmd *srb, struct us_data *ss)
975 {
976         int retry, i;
977         retry = 5;
978         do {
979                 memset(&srb->cmd[0], 0, 12);
980                 srb->cmd[0] = SCSI_INQUIRY;
981                 srb->cmd[1] = srb->lun << 5;
982                 srb->cmd[4] = 36;
983                 srb->datalen = 36;
984                 srb->cmdlen = 12;
985                 i = ss->transport(srb, ss);
986                 debug("inquiry returns %d\n", i);
987                 if (i == 0)
988                         break;
989         } while (--retry);
990
991         if (!retry) {
992                 printf("error in inquiry\n");
993                 return -1;
994         }
995         return 0;
996 }
997
998 static int usb_request_sense(struct scsi_cmd *srb, struct us_data *ss)
999 {
1000         char *ptr;
1001
1002         ptr = (char *)srb->pdata;
1003         memset(&srb->cmd[0], 0, 12);
1004         srb->cmd[0] = SCSI_REQ_SENSE;
1005         srb->cmd[1] = srb->lun << 5;
1006         srb->cmd[4] = 18;
1007         srb->datalen = 18;
1008         srb->pdata = &srb->sense_buf[0];
1009         srb->cmdlen = 12;
1010         ss->transport(srb, ss);
1011         debug("Request Sense returned %02X %02X %02X\n",
1012               srb->sense_buf[2], srb->sense_buf[12],
1013               srb->sense_buf[13]);
1014         srb->pdata = (uchar *)ptr;
1015         return 0;
1016 }
1017
1018 static int usb_test_unit_ready(struct scsi_cmd *srb, struct us_data *ss)
1019 {
1020         int retries = 10;
1021
1022         do {
1023                 memset(&srb->cmd[0], 0, 12);
1024                 srb->cmd[0] = SCSI_TST_U_RDY;
1025                 srb->cmd[1] = srb->lun << 5;
1026                 srb->datalen = 0;
1027                 srb->cmdlen = 12;
1028                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
1029                         ss->flags |= USB_READY;
1030                         return 0;
1031                 }
1032                 usb_request_sense(srb, ss);
1033                 /*
1034                  * Check the Key Code Qualifier, if it matches
1035                  * "Not Ready - medium not present"
1036                  * (the sense Key equals 0x2 and the ASC is 0x3a)
1037                  * return immediately as the medium being absent won't change
1038                  * unless there is a user action.
1039                  */
1040                 if ((srb->sense_buf[2] == 0x02) &&
1041                     (srb->sense_buf[12] == 0x3a))
1042                         return -1;
1043                 mdelay(100);
1044         } while (retries--);
1045
1046         return -1;
1047 }
1048
1049 static int usb_read_capacity(struct scsi_cmd *srb, struct us_data *ss)
1050 {
1051         int retry;
1052         /* XXX retries */
1053         retry = 3;
1054         do {
1055                 memset(&srb->cmd[0], 0, 12);
1056                 srb->cmd[0] = SCSI_RD_CAPAC;
1057                 srb->cmd[1] = srb->lun << 5;
1058                 srb->datalen = 8;
1059                 srb->cmdlen = 12;
1060                 if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
1061                         return 0;
1062         } while (retry--);
1063
1064         return -1;
1065 }
1066
1067 static int usb_read_10(struct scsi_cmd *srb, struct us_data *ss,
1068                        unsigned long start, unsigned short blocks)
1069 {
1070         memset(&srb->cmd[0], 0, 12);
1071         srb->cmd[0] = SCSI_READ10;
1072         srb->cmd[1] = srb->lun << 5;
1073         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1074         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1075         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1076         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1077         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1078         srb->cmd[8] = (unsigned char) blocks & 0xff;
1079         srb->cmdlen = 12;
1080         debug("read10: start %lx blocks %x\n", start, blocks);
1081         return ss->transport(srb, ss);
1082 }
1083
1084 static int usb_write_10(struct scsi_cmd *srb, struct us_data *ss,
1085                         unsigned long start, unsigned short blocks)
1086 {
1087         memset(&srb->cmd[0], 0, 12);
1088         srb->cmd[0] = SCSI_WRITE10;
1089         srb->cmd[1] = srb->lun << 5;
1090         srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
1091         srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
1092         srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
1093         srb->cmd[5] = ((unsigned char) (start)) & 0xff;
1094         srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
1095         srb->cmd[8] = (unsigned char) blocks & 0xff;
1096         srb->cmdlen = 12;
1097         debug("write10: start %lx blocks %x\n", start, blocks);
1098         return ss->transport(srb, ss);
1099 }
1100
1101
1102 #ifdef CONFIG_USB_BIN_FIXUP
1103 /*
1104  * Some USB storage devices queried for SCSI identification data respond with
1105  * binary strings, which if output to the console freeze the terminal. The
1106  * workaround is to modify the vendor and product strings read from such
1107  * device with proper values (as reported by 'usb info').
1108  *
1109  * Vendor and product length limits are taken from the definition of
1110  * struct blk_desc in include/part.h.
1111  */
1112 static void usb_bin_fixup(struct usb_device_descriptor descriptor,
1113                                 unsigned char vendor[],
1114                                 unsigned char product[]) {
1115         const unsigned char max_vendor_len = 40;
1116         const unsigned char max_product_len = 20;
1117         if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
1118                 strncpy((char *)vendor, "SMSC", max_vendor_len);
1119                 strncpy((char *)product, "Flash Media Cntrller",
1120                         max_product_len);
1121         }
1122 }
1123 #endif /* CONFIG_USB_BIN_FIXUP */
1124
1125 #ifdef CONFIG_BLK
1126 static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
1127                                    lbaint_t blkcnt, void *buffer)
1128 #else
1129 static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
1130                                    lbaint_t blkcnt, void *buffer)
1131 #endif
1132 {
1133         lbaint_t start, blks;
1134         uintptr_t buf_addr;
1135         unsigned short smallblks;
1136         struct usb_device *udev;
1137         struct us_data *ss;
1138         int retry;
1139         struct scsi_cmd *srb = &usb_ccb;
1140 #ifdef CONFIG_BLK
1141         struct blk_desc *block_dev;
1142 #endif
1143
1144         if (blkcnt == 0)
1145                 return 0;
1146         /* Setup  device */
1147 #ifdef CONFIG_BLK
1148         block_dev = dev_get_uclass_platdata(dev);
1149         udev = dev_get_parent_priv(dev_get_parent(dev));
1150         debug("\nusb_read: udev %d\n", block_dev->devnum);
1151 #else
1152         debug("\nusb_read: udev %d\n", block_dev->devnum);
1153         udev = usb_dev_desc[block_dev->devnum].priv;
1154         if (!udev) {
1155                 debug("%s: No device\n", __func__);
1156                 return 0;
1157         }
1158 #endif
1159         ss = (struct us_data *)udev->privptr;
1160
1161         usb_disable_asynch(1); /* asynch transfer not allowed */
1162         srb->lun = block_dev->lun;
1163         buf_addr = (uintptr_t)buffer;
1164         start = blknr;
1165         blks = blkcnt;
1166
1167         debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
1168               PRIxPTR "\n", block_dev->devnum, start, blks, buf_addr);
1169
1170         do {
1171                 /* XXX need some comment here */
1172                 retry = 2;
1173                 srb->pdata = (unsigned char *)buf_addr;
1174                 if (blks > ss->max_xfer_blk)
1175                         smallblks = ss->max_xfer_blk;
1176                 else
1177                         smallblks = (unsigned short) blks;
1178 retry_it:
1179                 if (smallblks == ss->max_xfer_blk)
1180                         usb_show_progress();
1181                 srb->datalen = block_dev->blksz * smallblks;
1182                 srb->pdata = (unsigned char *)buf_addr;
1183                 if (usb_read_10(srb, ss, start, smallblks)) {
1184                         debug("Read ERROR\n");
1185                         usb_request_sense(srb, ss);
1186                         if (retry--)
1187                                 goto retry_it;
1188                         blkcnt -= blks;
1189                         break;
1190                 }
1191                 start += smallblks;
1192                 blks -= smallblks;
1193                 buf_addr += srb->datalen;
1194         } while (blks != 0);
1195         ss->flags &= ~USB_READY;
1196
1197         debug("usb_read: end startblk " LBAF
1198               ", blccnt %x buffer %" PRIxPTR "\n",
1199               start, smallblks, buf_addr);
1200
1201         usb_disable_asynch(0); /* asynch transfer allowed */
1202         if (blkcnt >= ss->max_xfer_blk)
1203                 debug("\n");
1204         return blkcnt;
1205 }
1206
1207 #ifdef CONFIG_BLK
1208 static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
1209                                     lbaint_t blkcnt, const void *buffer)
1210 #else
1211 static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
1212                                     lbaint_t blkcnt, const void *buffer)
1213 #endif
1214 {
1215         lbaint_t start, blks;
1216         uintptr_t buf_addr;
1217         unsigned short smallblks;
1218         struct usb_device *udev;
1219         struct us_data *ss;
1220         int retry;
1221         struct scsi_cmd *srb = &usb_ccb;
1222 #ifdef CONFIG_BLK
1223         struct blk_desc *block_dev;
1224 #endif
1225
1226         if (blkcnt == 0)
1227                 return 0;
1228
1229         /* Setup  device */
1230 #ifdef CONFIG_BLK
1231         block_dev = dev_get_uclass_platdata(dev);
1232         udev = dev_get_parent_priv(dev_get_parent(dev));
1233         debug("\nusb_read: udev %d\n", block_dev->devnum);
1234 #else
1235         debug("\nusb_read: udev %d\n", block_dev->devnum);
1236         udev = usb_dev_desc[block_dev->devnum].priv;
1237         if (!udev) {
1238                 debug("%s: No device\n", __func__);
1239                 return 0;
1240         }
1241 #endif
1242         ss = (struct us_data *)udev->privptr;
1243
1244         usb_disable_asynch(1); /* asynch transfer not allowed */
1245
1246         srb->lun = block_dev->lun;
1247         buf_addr = (uintptr_t)buffer;
1248         start = blknr;
1249         blks = blkcnt;
1250
1251         debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF " buffer %"
1252               PRIxPTR "\n", block_dev->devnum, start, blks, buf_addr);
1253
1254         do {
1255                 /* If write fails retry for max retry count else
1256                  * return with number of blocks written successfully.
1257                  */
1258                 retry = 2;
1259                 srb->pdata = (unsigned char *)buf_addr;
1260                 if (blks > ss->max_xfer_blk)
1261                         smallblks = ss->max_xfer_blk;
1262                 else
1263                         smallblks = (unsigned short) blks;
1264 retry_it:
1265                 if (smallblks == ss->max_xfer_blk)
1266                         usb_show_progress();
1267                 srb->datalen = block_dev->blksz * smallblks;
1268                 srb->pdata = (unsigned char *)buf_addr;
1269                 if (usb_write_10(srb, ss, start, smallblks)) {
1270                         debug("Write ERROR\n");
1271                         usb_request_sense(srb, ss);
1272                         if (retry--)
1273                                 goto retry_it;
1274                         blkcnt -= blks;
1275                         break;
1276                 }
1277                 start += smallblks;
1278                 blks -= smallblks;
1279                 buf_addr += srb->datalen;
1280         } while (blks != 0);
1281         ss->flags &= ~USB_READY;
1282
1283         debug("usb_write: end startblk " LBAF ", blccnt %x buffer %"
1284               PRIxPTR "\n", start, smallblks, buf_addr);
1285
1286         usb_disable_asynch(0); /* asynch transfer allowed */
1287         if (blkcnt >= ss->max_xfer_blk)
1288                 debug("\n");
1289         return blkcnt;
1290
1291 }
1292
1293 /* Probe to see if a new device is actually a Storage device */
1294 int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
1295                       struct us_data *ss)
1296 {
1297         struct usb_interface *iface;
1298         int i;
1299         struct usb_endpoint_descriptor *ep_desc;
1300         unsigned int flags = 0;
1301
1302         /* let's examine the device now */
1303         iface = &dev->config.if_desc[ifnum];
1304
1305         if (dev->descriptor.bDeviceClass != 0 ||
1306                         iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
1307                         iface->desc.bInterfaceSubClass < US_SC_MIN ||
1308                         iface->desc.bInterfaceSubClass > US_SC_MAX) {
1309                 debug("Not mass storage\n");
1310                 /* if it's not a mass storage, we go no further */
1311                 return 0;
1312         }
1313
1314         memset(ss, 0, sizeof(struct us_data));
1315
1316         /* At this point, we know we've got a live one */
1317         debug("\n\nUSB Mass Storage device detected\n");
1318
1319         /* Initialize the us_data structure with some useful info */
1320         ss->flags = flags;
1321         ss->ifnum = ifnum;
1322         ss->pusb_dev = dev;
1323         ss->attention_done = 0;
1324         ss->subclass = iface->desc.bInterfaceSubClass;
1325         ss->protocol = iface->desc.bInterfaceProtocol;
1326
1327         /* set the handler pointers based on the protocol */
1328         debug("Transport: ");
1329         switch (ss->protocol) {
1330         case US_PR_CB:
1331                 debug("Control/Bulk\n");
1332                 ss->transport = usb_stor_CB_transport;
1333                 ss->transport_reset = usb_stor_CB_reset;
1334                 break;
1335
1336         case US_PR_CBI:
1337                 debug("Control/Bulk/Interrupt\n");
1338                 ss->transport = usb_stor_CB_transport;
1339                 ss->transport_reset = usb_stor_CB_reset;
1340                 break;
1341         case US_PR_BULK:
1342                 debug("Bulk/Bulk/Bulk\n");
1343                 ss->transport = usb_stor_BBB_transport;
1344                 ss->transport_reset = usb_stor_BBB_reset;
1345                 break;
1346         default:
1347                 printf("USB Storage Transport unknown / not yet implemented\n");
1348                 return 0;
1349                 break;
1350         }
1351
1352         /*
1353          * We are expecting a minimum of 2 endpoints - in and out (bulk).
1354          * An optional interrupt is OK (necessary for CBI protocol).
1355          * We will ignore any others.
1356          */
1357         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
1358                 ep_desc = &iface->ep_desc[i];
1359                 /* is it an BULK endpoint? */
1360                 if ((ep_desc->bmAttributes &
1361                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
1362                         if (ep_desc->bEndpointAddress & USB_DIR_IN)
1363                                 ss->ep_in = ep_desc->bEndpointAddress &
1364                                                 USB_ENDPOINT_NUMBER_MASK;
1365                         else
1366                                 ss->ep_out =
1367                                         ep_desc->bEndpointAddress &
1368                                         USB_ENDPOINT_NUMBER_MASK;
1369                 }
1370
1371                 /* is it an interrupt endpoint? */
1372                 if ((ep_desc->bmAttributes &
1373                      USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
1374                         ss->ep_int = ep_desc->bEndpointAddress &
1375                                                 USB_ENDPOINT_NUMBER_MASK;
1376                         ss->irqinterval = ep_desc->bInterval;
1377                 }
1378         }
1379         debug("Endpoints In %d Out %d Int %d\n",
1380               ss->ep_in, ss->ep_out, ss->ep_int);
1381
1382         /* Do some basic sanity checks, and bail if we find a problem */
1383         if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
1384             !ss->ep_in || !ss->ep_out ||
1385             (ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
1386                 debug("Problems with device\n");
1387                 return 0;
1388         }
1389         /* set class specific stuff */
1390         /* We only handle certain protocols.  Currently, these are
1391          * the only ones.
1392          * The SFF8070 accepts the requests used in u-boot
1393          */
1394         if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
1395             ss->subclass != US_SC_8070) {
1396                 printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
1397                 return 0;
1398         }
1399         if (ss->ep_int) {
1400                 /* we had found an interrupt endpoint, prepare irq pipe
1401                  * set up the IRQ pipe and handler
1402                  */
1403                 ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
1404                 ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
1405                 ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
1406                 dev->irq_handle = usb_stor_irq;
1407         }
1408
1409         /* Set the maximum transfer size per host controller setting */
1410         usb_stor_set_max_xfer_blk(dev, ss);
1411
1412         dev->privptr = (void *)ss;
1413         return 1;
1414 }
1415
1416 int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
1417                       struct blk_desc *dev_desc)
1418 {
1419         unsigned char perq, modi;
1420         ALLOC_CACHE_ALIGN_BUFFER(u32, cap, 2);
1421         ALLOC_CACHE_ALIGN_BUFFER(u8, usb_stor_buf, 36);
1422         u32 capacity, blksz;
1423         struct scsi_cmd *pccb = &usb_ccb;
1424
1425         pccb->pdata = usb_stor_buf;
1426
1427         dev_desc->target = dev->devnum;
1428         pccb->lun = dev_desc->lun;
1429         debug(" address %d\n", dev_desc->target);
1430
1431         if (usb_inquiry(pccb, ss)) {
1432                 debug("%s: usb_inquiry() failed\n", __func__);
1433                 return -1;
1434         }
1435
1436         perq = usb_stor_buf[0];
1437         modi = usb_stor_buf[1];
1438
1439         /*
1440          * Skip unknown devices (0x1f) and enclosure service devices (0x0d),
1441          * they would not respond to test_unit_ready .
1442          */
1443         if (((perq & 0x1f) == 0x1f) || ((perq & 0x1f) == 0x0d)) {
1444                 debug("%s: unknown/unsupported device\n", __func__);
1445                 return 0;
1446         }
1447         if ((modi&0x80) == 0x80) {
1448                 /* drive is removable */
1449                 dev_desc->removable = 1;
1450         }
1451         memcpy(dev_desc->vendor, (const void *)&usb_stor_buf[8], 8);
1452         memcpy(dev_desc->product, (const void *)&usb_stor_buf[16], 16);
1453         memcpy(dev_desc->revision, (const void *)&usb_stor_buf[32], 4);
1454         dev_desc->vendor[8] = 0;
1455         dev_desc->product[16] = 0;
1456         dev_desc->revision[4] = 0;
1457 #ifdef CONFIG_USB_BIN_FIXUP
1458         usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
1459                       (uchar *)dev_desc->product);
1460 #endif /* CONFIG_USB_BIN_FIXUP */
1461         debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
1462               usb_stor_buf[3]);
1463         if (usb_test_unit_ready(pccb, ss)) {
1464                 printf("Device NOT ready\n"
1465                        "   Request Sense returned %02X %02X %02X\n",
1466                        pccb->sense_buf[2], pccb->sense_buf[12],
1467                        pccb->sense_buf[13]);
1468                 if (dev_desc->removable == 1)
1469                         dev_desc->type = perq;
1470                 return 0;
1471         }
1472         pccb->pdata = (unsigned char *)cap;
1473         memset(pccb->pdata, 0, 8);
1474         if (usb_read_capacity(pccb, ss) != 0) {
1475                 printf("READ_CAP ERROR\n");
1476                 cap[0] = 2880;
1477                 cap[1] = 0x200;
1478         }
1479         ss->flags &= ~USB_READY;
1480         debug("Read Capacity returns: 0x%08x, 0x%08x\n", cap[0], cap[1]);
1481 #if 0
1482         if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
1483                 cap[0] >>= 16;
1484
1485         cap[0] = cpu_to_be32(cap[0]);
1486         cap[1] = cpu_to_be32(cap[1]);
1487 #endif
1488
1489         capacity = be32_to_cpu(cap[0]) + 1;
1490         blksz = be32_to_cpu(cap[1]);
1491
1492         debug("Capacity = 0x%08x, blocksz = 0x%08x\n", capacity, blksz);
1493         dev_desc->lba = capacity;
1494         dev_desc->blksz = blksz;
1495         dev_desc->log2blksz = LOG2(dev_desc->blksz);
1496         dev_desc->type = perq;
1497         debug(" address %d\n", dev_desc->target);
1498
1499         return 1;
1500 }
1501
1502 #ifdef CONFIG_DM_USB
1503
1504 static int usb_mass_storage_probe(struct udevice *dev)
1505 {
1506         struct usb_device *udev = dev_get_parent_priv(dev);
1507         int ret;
1508
1509         usb_disable_asynch(1); /* asynch transfer not allowed */
1510         ret = usb_stor_probe_device(udev);
1511         usb_disable_asynch(0); /* asynch transfer allowed */
1512
1513         return ret;
1514 }
1515
1516 static const struct udevice_id usb_mass_storage_ids[] = {
1517         { .compatible = "usb-mass-storage" },
1518         { }
1519 };
1520
1521 U_BOOT_DRIVER(usb_mass_storage) = {
1522         .name   = "usb_mass_storage",
1523         .id     = UCLASS_MASS_STORAGE,
1524         .of_match = usb_mass_storage_ids,
1525         .probe = usb_mass_storage_probe,
1526 #ifdef CONFIG_BLK
1527         .platdata_auto_alloc_size       = sizeof(struct us_data),
1528 #endif
1529 };
1530
1531 UCLASS_DRIVER(usb_mass_storage) = {
1532         .id             = UCLASS_MASS_STORAGE,
1533         .name           = "usb_mass_storage",
1534 };
1535
1536 static const struct usb_device_id mass_storage_id_table[] = {
1537         {
1538                 .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1539                 .bInterfaceClass = USB_CLASS_MASS_STORAGE
1540         },
1541         { }             /* Terminating entry */
1542 };
1543
1544 U_BOOT_USB_DEVICE(usb_mass_storage, mass_storage_id_table);
1545 #endif
1546
1547 #ifdef CONFIG_BLK
1548 static const struct blk_ops usb_storage_ops = {
1549         .read   = usb_stor_read,
1550         .write  = usb_stor_write,
1551 };
1552
1553 U_BOOT_DRIVER(usb_storage_blk) = {
1554         .name           = "usb_storage_blk",
1555         .id             = UCLASS_BLK,
1556         .ops            = &usb_storage_ops,
1557 };
1558 #else
1559 U_BOOT_LEGACY_BLK(usb) = {
1560         .if_typename    = "usb",
1561         .if_type        = IF_TYPE_USB,
1562         .max_devs       = USB_MAX_STOR_DEV,
1563         .desc           = usb_dev_desc,
1564 };
1565 #endif