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