Lines Matching +full:has +full:- +full:ecc
1 // SPDX-License-Identifier: GPL-2.0+
3 * Driver for Alauda-based card readers
10 * Alauda implements a vendor-specific command set to access two media reader
14 * The driver was developed through reverse-engineering, with the help of the
15 * sddr09 driver which has many similarities, and with some help from the
16 * (very old) vendor-supplied GPL sma03 driver.
34 #define DRV_NAME "ums-alauda"
36 MODULE_DESCRIPTION("Driver for Alauda-based card readers");
116 #define MEDIA_PORT(us) us->srb->device->lun
117 #define MEDIA_INFO(us) ((struct alauda_info *)us->extra)->port[MEDIA_PORT(us)]
214 * ECC computation.
226 parity[i] = (parity[i&(i-1)] ^ 1); in nand_init_ecc()
244 /* compute 3-byte ecc on 256 bytes */
245 static void nand_compute_ecc(unsigned char *data, unsigned char *ecc) in nand_compute_ecc() argument
259 /* put 4+4+4 = 12 bits in the ecc */ in nand_compute_ecc()
261 ecc[0] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0)); in nand_compute_ecc()
264 ecc[1] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0)); in nand_compute_ecc()
266 ecc[2] = ecc2[par]; in nand_compute_ecc()
269 static int nand_compare_ecc(unsigned char *data, unsigned char *ecc) in nand_compare_ecc() argument
271 return (data[0] == ecc[0] && data[1] == ecc[1] && data[2] == ecc[2]); in nand_compare_ecc()
274 static void nand_store_ecc(unsigned char *data, unsigned char *ecc) in nand_store_ecc() argument
276 memcpy(data, ecc, 3); in nand_store_ecc()
284 * Forget our PBA <---> LBA mappings for a particular port
288 unsigned int shift = media_info->zoneshift in alauda_free_maps()
289 + media_info->blockshift + media_info->pageshift; in alauda_free_maps()
290 unsigned int num_zones = media_info->capacity >> shift; in alauda_free_maps()
293 if (media_info->lba_to_pba != NULL) in alauda_free_maps()
295 kfree(media_info->lba_to_pba[i]); in alauda_free_maps()
296 media_info->lba_to_pba[i] = NULL; in alauda_free_maps()
299 if (media_info->pba_to_lba != NULL) in alauda_free_maps()
301 kfree(media_info->pba_to_lba[i]); in alauda_free_maps()
302 media_info->pba_to_lba[i] = NULL; in alauda_free_maps()
320 rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe, in alauda_get_media_status()
342 return usb_stor_ctrl_transfer(us, us->send_ctrl_pipe, in alauda_ack_media()
347 * Retrieves a 4-byte media signature, which indicates manufacturer, capacity,
359 return usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe, in alauda_get_media_signature()
368 unsigned char *command = us->iobuf; in alauda_reset_media()
375 return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, in alauda_reset_media()
384 unsigned char *data = us->iobuf; in alauda_init_media()
425 MEDIA_INFO(us).capacity = 1 << media_info->chipshift; in alauda_init_media()
429 MEDIA_INFO(us).pageshift = media_info->pageshift; in alauda_init_media()
430 MEDIA_INFO(us).blockshift = media_info->blockshift; in alauda_init_media()
431 MEDIA_INFO(us).zoneshift = media_info->zoneshift; in alauda_init_media()
433 MEDIA_INFO(us).pagesize = 1 << media_info->pageshift; in alauda_init_media()
434 MEDIA_INFO(us).blocksize = 1 << media_info->blockshift; in alauda_init_media()
435 MEDIA_INFO(us).zonesize = 1 << media_info->zoneshift; in alauda_init_media()
437 MEDIA_INFO(us).uzonesize = ((1 << media_info->zoneshift) / 128) * 125; in alauda_init_media()
438 MEDIA_INFO(us).blockmask = MEDIA_INFO(us).blocksize - 1; in alauda_init_media()
454 * Examines the media status and does the right thing when the media has gone,
459 struct alauda_info *info = (struct alauda_info *) us->extra; in alauda_check_media()
460 unsigned char *status = us->iobuf; in alauda_check_media()
474 info->sense_key = 0x02; in alauda_check_media()
475 info->sense_asc = 0x3A; in alauda_check_media()
476 info->sense_ascq = 0x00; in alauda_check_media()
481 if (status[0] & 0x08 || !info->media_initialized) { in alauda_check_media()
486 info->media_initialized = true; in alauda_check_media()
487 info->sense_key = UNIT_ATTENTION; in alauda_check_media()
488 info->sense_asc = 0x28; in alauda_check_media()
489 info->sense_ascq = 0x00; in alauda_check_media()
509 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, in alauda_check_status2()
514 rc = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, in alauda_check_status2()
538 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, in alauda_get_redu_data()
543 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, in alauda_get_redu_data()
554 u16 *pba_to_lba = info->pba_to_lba[zone]; in alauda_find_unused_pba()
557 for (i = 0; i < info->zonesize; i++) in alauda_find_unused_pba()
559 return (zone << info->zoneshift) + i; in alauda_find_unused_pba()
566 * Produces lba <--> pba mappings
570 unsigned char *data = us->iobuf; in alauda_read_map()
605 usb_stor_dbg(us, "PBA %d has no logical mapping\n", blocknum); in alauda_read_map()
618 …usb_stor_dbg(us, "PBA %d has no logical mapping: reserved area = %02X%02X%02X%02X data status %02X… in alauda_read_map()
627 usb_stor_dbg(us, "PBA %d has invalid address field %02X%02X/%02X%02X\n", in alauda_read_map()
651 * In other words, in PBA 1024-2047 you will find LBA 0-999 in alauda_read_map()
652 * which are really LBA 1000-1999. This allows for 24 bad in alauda_read_map()
713 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, in alauda_erase_block()
718 rc = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, in alauda_erase_block()
742 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, in alauda_read_block_raw()
747 return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, in alauda_read_block_raw()
785 struct alauda_info *info = (struct alauda_info *) us->extra; in alauda_write_block()
793 rc = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, in alauda_write_block()
798 rc = usb_stor_bulk_transfer_buf(us, info->wr_ep, data, in alauda_write_block()
816 unsigned char ecc[3]; in alauda_write_lba() local
864 nand_compute_ecc(bptr, ecc); in alauda_write_lba()
865 if (!nand_compare_ecc(cptr+13, ecc)) { in alauda_write_lba()
866 usb_stor_dbg(us, "Warning: bad ecc in page %d- of pba %d\n", in alauda_write_lba()
868 nand_store_ecc(cptr+13, ecc); in alauda_write_lba()
870 nand_compute_ecc(bptr + (pagesize / 2), ecc); in alauda_write_lba()
871 if (!nand_compare_ecc(cptr+8, ecc)) { in alauda_write_lba()
872 usb_stor_dbg(us, "Warning: bad ecc in page %d+ of pba %d\n", in alauda_write_lba()
874 nand_store_ecc(cptr+8, ecc); in alauda_write_lba()
880 /* copy in new stuff and compute ECC */ in alauda_write_lba()
887 nand_compute_ecc(bptr, ecc); in alauda_write_lba()
888 nand_store_ecc(cptr+13, ecc); in alauda_write_lba()
889 nand_compute_ecc(bptr + (pagesize / 2), ecc); in alauda_write_lba()
890 nand_store_ecc(cptr+8, ecc); in alauda_write_lba()
897 new_pba_offset = new_pba - (zone * zonesize); in alauda_write_lba()
903 unsigned int pba_offset = pba - (zone * zonesize); in alauda_write_lba()
954 unsigned int lba_offset = lba - (zone * uzonesize); in alauda_read_data()
968 pages = min(sectors, blocksize - page); in alauda_read_data()
980 * that the block has never been written. in alauda_read_data()
996 usb_stor_access_xfer_buf(buffer, len, us->srb, in alauda_read_data()
1001 sectors -= pages; in alauda_read_data()
1056 unsigned int pages = min(sectors, blocksize - page); in alauda_write_data()
1068 usb_stor_access_xfer_buf(buffer, len, us->srb, in alauda_write_data()
1078 sectors -= pages; in alauda_write_data()
1099 struct alauda_media_info *media_info = &info->port[port]; in alauda_info_destructor()
1102 kfree(media_info->lba_to_pba); in alauda_info_destructor()
1103 kfree(media_info->pba_to_lba); in alauda_info_destructor()
1108 * Initialize alauda_info struct and find the data-write endpoint
1113 struct usb_host_interface *altsetting = us->pusb_intf->cur_altsetting; in init_alauda()
1116 us->extra = kzalloc(sizeof(struct alauda_info), GFP_NOIO); in init_alauda()
1117 if (!us->extra) in init_alauda()
1118 return -ENOMEM; in init_alauda()
1120 info = (struct alauda_info *) us->extra; in init_alauda()
1121 us->extra_destructor = alauda_info_destructor; in init_alauda()
1123 info->wr_ep = usb_sndbulkpipe(us->pusb_dev, in init_alauda()
1124 altsetting->endpoint[0].desc.bEndpointAddress in init_alauda()
1133 struct alauda_info *info = (struct alauda_info *) us->extra; in alauda_transport()
1134 unsigned char *ptr = us->iobuf; in alauda_transport()
1139 if (srb->cmnd[0] == INQUIRY) { in alauda_transport()
1140 usb_stor_dbg(us, "INQUIRY - Returning bogus response\n"); in alauda_transport()
1146 if (srb->cmnd[0] == TEST_UNIT_READY) { in alauda_transport()
1151 if (srb->cmnd[0] == READ_CAPACITY) { in alauda_transport()
1166 ((__be32 *) ptr)[0] = cpu_to_be32(capacity - 1); in alauda_transport()
1173 if (srb->cmnd[0] == READ_10) { in alauda_transport()
1180 page = short_pack(srb->cmnd[3], srb->cmnd[2]); in alauda_transport()
1182 page |= short_pack(srb->cmnd[5], srb->cmnd[4]); in alauda_transport()
1183 pages = short_pack(srb->cmnd[8], srb->cmnd[7]); in alauda_transport()
1190 if (srb->cmnd[0] == WRITE_10) { in alauda_transport()
1197 page = short_pack(srb->cmnd[3], srb->cmnd[2]); in alauda_transport()
1199 page |= short_pack(srb->cmnd[5], srb->cmnd[4]); in alauda_transport()
1200 pages = short_pack(srb->cmnd[8], srb->cmnd[7]); in alauda_transport()
1207 if (srb->cmnd[0] == REQUEST_SENSE) { in alauda_transport()
1212 ptr[2] = info->sense_key; in alauda_transport()
1214 ptr[12] = info->sense_asc; in alauda_transport()
1215 ptr[13] = info->sense_ascq; in alauda_transport()
1221 if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) { in alauda_transport()
1230 srb->cmnd[0], srb->cmnd[0]); in alauda_transport()
1231 info->sense_key = 0x05; in alauda_transport()
1232 info->sense_asc = 0x20; in alauda_transport()
1233 info->sense_ascq = 0x00; in alauda_transport()
1246 (id - alauda_usb_ids) + alauda_unusual_dev_list, in alauda_probe()
1251 us->transport_name = "Alauda Control/Bulk"; in alauda_probe()
1252 us->transport = alauda_transport; in alauda_probe()
1253 us->transport_reset = usb_stor_Bulk_reset; in alauda_probe()
1254 us->max_lun = 1; in alauda_probe()