248 static int pf_identify(struct pf_unit *pf);
249 static void pf_lock(struct pf_unit *pf, int func);
250 static void pf_eject(struct pf_unit *pf);
290 	struct pf_unit *pf;  in pf_init_units()  local
294 	for (unit = 0, pf = units; unit < PF_UNITS; unit++, pf++) {  in pf_init_units()
301 		disk->queue = blk_mq_init_sq_queue(&pf->tag_set, &pf_mq_ops,  in pf_init_units()
309 		INIT_LIST_HEAD(&pf->rq_list);  in pf_init_units()
310 		disk->queue->queuedata = pf;  in pf_init_units()
313 		pf->disk = disk;  in pf_init_units()
314 		pf->pi = &pf->pia;  in pf_init_units()
315 		pf->media_status = PF_NM;  in pf_init_units()
316 		pf->drive = (*drives[unit])[D_SLV];  in pf_init_units()
317 		pf->lun = (*drives[unit])[D_LUN];  in pf_init_units()
318 		snprintf(pf->name, PF_NAMELEN, "%s%d", name, unit);  in pf_init_units()
321 		strcpy(disk->disk_name, pf->name);  in pf_init_units()
331 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_open()  local
335 	pf_identify(pf);  in pf_open()
338 	if (pf->media_status == PF_NM)  in pf_open()
342 	if ((pf->media_status == PF_RO) && (mode & FMODE_WRITE))  in pf_open()
346 	pf->access++;  in pf_open()
347 	if (pf->removable)  in pf_open()
348 		pf_lock(pf, 1);  in pf_open()
356 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_getgeo()  local
357 	sector_t capacity = get_capacity(pf->disk);  in pf_getgeo()
374 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_ioctl()  local
379 	if (pf->access != 1)  in pf_ioctl()
382 	pf_eject(pf);  in pf_ioctl()
390 	struct pf_unit *pf = disk->private_data;  in pf_release()  local
393 	if (pf->access <= 0) {  in pf_release()
399 	pf->access--;  in pf_release()
401 	if (!pf->access && pf->removable)  in pf_release()
402 		pf_lock(pf, 0);  in pf_release()
412 static inline int status_reg(struct pf_unit *pf)  in status_reg()  argument
414 	return pi_read_regr(pf->pi, 1, 6);  in status_reg()
417 static inline int read_reg(struct pf_unit *pf, int reg)  in read_reg()  argument
419 	return pi_read_regr(pf->pi, 0, reg);  in read_reg()
422 static inline void write_reg(struct pf_unit *pf, int reg, int val)  in write_reg()  argument
424 	pi_write_regr(pf->pi, 0, reg, val);  in write_reg()
427 static int pf_wait(struct pf_unit *pf, int go, int stop, char *fun, char *msg)  in pf_wait()  argument
432 	while ((((r = status_reg(pf)) & go) || (stop && (!(r & stop))))  in pf_wait()
437 		s = read_reg(pf, 7);  in pf_wait()
438 		e = read_reg(pf, 1);  in pf_wait()
439 		p = read_reg(pf, 2);  in pf_wait()
445 			       pf->name, fun, msg, r, s, e, j, p);  in pf_wait()
451 static int pf_command(struct pf_unit *pf, char *cmd, int dlen, char *fun)  in pf_command()  argument
453 	pi_connect(pf->pi);  in pf_command()
455 	write_reg(pf, 6, 0xa0+0x10*pf->drive);  in pf_command()
457 	if (pf_wait(pf, STAT_BUSY | STAT_DRQ, 0, fun, "before command")) {  in pf_command()
458 		pi_disconnect(pf->pi);  in pf_command()
462 	write_reg(pf, 4, dlen % 256);  in pf_command()
463 	write_reg(pf, 5, dlen / 256);  in pf_command()
464 	write_reg(pf, 7, 0xa0);	/* ATAPI packet command */  in pf_command()
466 	if (pf_wait(pf, STAT_BUSY, STAT_DRQ, fun, "command DRQ")) {  in pf_command()
467 		pi_disconnect(pf->pi);  in pf_command()
471 	if (read_reg(pf, 2) != 1) {  in pf_command()
472 		printk("%s: %s: command phase error\n", pf->name, fun);  in pf_command()
473 		pi_disconnect(pf->pi);  in pf_command()
477 	pi_write_block(pf->pi, cmd, 12);  in pf_command()
482 static int pf_completion(struct pf_unit *pf, char *buf, char *fun)  in pf_completion()  argument
486 	r = pf_wait(pf, STAT_BUSY, STAT_DRQ | STAT_READY | STAT_ERR,  in pf_completion()
489 	if ((read_reg(pf, 2) & 2) && (read_reg(pf, 7) & STAT_DRQ)) {  in pf_completion()
490 		n = (((read_reg(pf, 4) + 256 * read_reg(pf, 5)) +  in pf_completion()
492 		pi_read_block(pf->pi, buf, n);  in pf_completion()
495 	s = pf_wait(pf, STAT_BUSY, STAT_READY | STAT_ERR, fun, "data done");  in pf_completion()
497 	pi_disconnect(pf->pi);  in pf_completion()
502 static void pf_req_sense(struct pf_unit *pf, int quiet)  in pf_req_sense()  argument
505 	    { ATAPI_REQ_SENSE, pf->lun << 5, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };  in pf_req_sense()
509 	r = pf_command(pf, rs_cmd, 16, "Request sense");  in pf_req_sense()
512 		pf_completion(pf, buf, "Request sense");  in pf_req_sense()
516 		       pf->name, buf[2] & 0xf, buf[12], buf[13]);  in pf_req_sense()
519 static int pf_atapi(struct pf_unit *pf, char *cmd, int dlen, char *buf, char *fun)  in pf_atapi()  argument
523 	r = pf_command(pf, cmd, dlen, fun);  in pf_atapi()
526 		r = pf_completion(pf, buf, fun);  in pf_atapi()
528 		pf_req_sense(pf, !fun);  in pf_atapi()
533 static void pf_lock(struct pf_unit *pf, int func)  in pf_lock()  argument
535 	char lo_cmd[12] = { ATAPI_LOCK, pf->lun << 5, 0, 0, func, 0, 0, 0, 0, 0, 0, 0 };  in pf_lock()
537 	pf_atapi(pf, lo_cmd, 0, pf_scratch, func ? "lock" : "unlock");  in pf_lock()
540 static void pf_eject(struct pf_unit *pf)  in pf_eject()  argument
542 	char ej_cmd[12] = { ATAPI_DOOR, pf->lun << 5, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };  in pf_eject()
544 	pf_lock(pf, 0);  in pf_eject()
545 	pf_atapi(pf, ej_cmd, 0, pf_scratch, "eject");  in pf_eject()
560 static int pf_reset(struct pf_unit *pf)  in pf_reset()  argument
565 	pi_connect(pf->pi);  in pf_reset()
566 	write_reg(pf, 6, 0xa0+0x10*pf->drive);  in pf_reset()
567 	write_reg(pf, 7, 8);  in pf_reset()
572 	while ((k++ < PF_RESET_TMO) && (status_reg(pf) & STAT_BUSY))  in pf_reset()
577 		flg &= (read_reg(pf, i + 1) == expect[i]);  in pf_reset()
580 		printk("%s: Reset (%d) signature = ", pf->name, k);  in pf_reset()
582 			printk("%3x", read_reg(pf, i + 1));  in pf_reset()
588 	pi_disconnect(pf->pi);  in pf_reset()
592 static void pf_mode_sense(struct pf_unit *pf)  in pf_mode_sense()  argument
595 	    { ATAPI_MODE_SENSE, pf->lun << 5, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0 };  in pf_mode_sense()
598 	pf_atapi(pf, ms_cmd, 8, buf, "mode sense");  in pf_mode_sense()
599 	pf->media_status = PF_RW;  in pf_mode_sense()
601 		pf->media_status = PF_RO;  in pf_mode_sense()
628 static void pf_get_capacity(struct pf_unit *pf)  in pf_get_capacity()  argument
630 	char rc_cmd[12] = { ATAPI_CAPACITY, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  in pf_get_capacity()
634 	if (pf_atapi(pf, rc_cmd, 8, buf, "get capacity")) {  in pf_get_capacity()
635 		pf->media_status = PF_NM;  in pf_get_capacity()
638 	set_capacity(pf->disk, xl(buf, 0) + 1);  in pf_get_capacity()
641 		set_capacity(pf->disk, 0);  in pf_get_capacity()
645 			       pf->name, pf->drive, pf->lun, bs);  in pf_get_capacity()
649 static int pf_identify(struct pf_unit *pf)  in pf_identify()  argument
655 	    { ATAPI_IDENTIFY, pf->lun << 5, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };  in pf_identify()
658 	s = pf_atapi(pf, id_cmd, 36, buf, "identify");  in pf_identify()
666 			       pf->name, pf->drive, pf->lun, dt);  in pf_identify()
673 	pf->removable = (buf[1] & 0x80);  in pf_identify()
675 	pf_mode_sense(pf);  in pf_identify()
676 	pf_mode_sense(pf);  in pf_identify()
677 	pf_mode_sense(pf);  in pf_identify()
679 	pf_get_capacity(pf);  in pf_identify()
682 	       pf->name, mf, id, ms[pf->drive], pf->lun, dt);  in pf_identify()
683 	if (pf->removable)  in pf_identify()
685 	if (pf->media_status == PF_NM)  in pf_identify()
688 		if (pf->media_status == PF_RO)  in pf_identify()
691 			(unsigned long long)get_capacity(pf->disk));  in pf_identify()
699 static int pf_probe(struct pf_unit *pf)  in pf_probe()  argument
701 	if (pf->drive == -1) {  in pf_probe()
702 		for (pf->drive = 0; pf->drive <= 1; pf->drive++)  in pf_probe()
703 			if (!pf_reset(pf)) {  in pf_probe()
704 				if (pf->lun != -1)  in pf_probe()
705 					return pf_identify(pf);  in pf_probe()
707 					for (pf->lun = 0; pf->lun < 8; pf->lun++)  in pf_probe()
708 						if (!pf_identify(pf))  in pf_probe()
712 		if (pf_reset(pf))  in pf_probe()
714 		if (pf->lun != -1)  in pf_probe()
715 			return pf_identify(pf);  in pf_probe()
716 		for (pf->lun = 0; pf->lun < 8; pf->lun++)  in pf_probe()
717 			if (!pf_identify(pf))  in pf_probe()
725 	struct pf_unit *pf = units;  in pf_detect()  local
738 		if (pi_init(pf->pi, 1, -1, -1, -1, -1, -1, pf_scratch, PI_PF,  in pf_detect()
739 			    verbose, pf->name)) {  in pf_detect()
740 			if (!pf_probe(pf) && pf->disk) {  in pf_detect()
741 				pf->present = 1;  in pf_detect()
744 				pi_release(pf->pi);  in pf_detect()
748 		for (unit = 0; unit < PF_UNITS; unit++, pf++) {  in pf_detect()
752 			if (pi_init(pf->pi, 0, conf[D_PRT], conf[D_MOD],  in pf_detect()
754 				    pf_scratch, PI_PF, verbose, pf->name)) {  in pf_detect()
755 				if (pf->disk && !pf_probe(pf)) {  in pf_detect()
756 					pf->present = 1;  in pf_detect()
759 					pi_release(pf->pi);  in pf_detect()
766 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_detect()
767 		if (!pf->disk)  in pf_detect()
769 		blk_cleanup_queue(pf->disk->queue);  in pf_detect()
770 		pf->disk->queue = NULL;  in pf_detect()
771 		blk_mq_free_tag_set(&pf->tag_set);  in pf_detect()
772 		put_disk(pf->disk);  in pf_detect()
780 static int pf_start(struct pf_unit *pf, int cmd, int b, int c)  in pf_start()  argument
783 	char io_cmd[12] = { cmd, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  in pf_start()
793 	i = pf_command(pf, io_cmd, c * 512, "start i/o");  in pf_start()
809 	struct pf_unit *pf;  in set_next_request()  local
813 		pf = &units[pf_queue];  in set_next_request()
816 		if (pf->present && !list_empty(&pf->rq_list)) {  in set_next_request()
817 			pf_req = list_first_entry(&pf->rq_list, struct request,  in set_next_request()
875 	struct pf_unit *pf = hctx->queue->queuedata;  in pf_queue_rq()  local
878 	list_add_tail(&bd->rq->queuelist, &pf->rq_list);  in pf_queue_rq()
1023 	struct pf_unit *pf;  in pf_init()  local
1036 		for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_init()
1037 			if (!pf->disk)  in pf_init()
1039 			blk_cleanup_queue(pf->disk->queue);  in pf_init()
1040 			blk_mq_free_tag_set(&pf->tag_set);  in pf_init()
1041 			put_disk(pf->disk);  in pf_init()
1046 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_init()
1047 		struct gendisk *disk = pf->disk;  in pf_init()
1049 		if (!pf->present)  in pf_init()
1051 		disk->private_data = pf;  in pf_init()
1059 	struct pf_unit *pf;  in pf_exit()  local
1062 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_exit()
1063 		if (!pf->disk)  in pf_exit()
1066 		if (pf->present)  in pf_exit()
1067 			del_gendisk(pf->disk);  in pf_exit()
1069 		blk_cleanup_queue(pf->disk->queue);  in pf_exit()
1070 		blk_mq_free_tag_set(&pf->tag_set);  in pf_exit()
1071 		put_disk(pf->disk);  in pf_exit()
1073 		if (pf->present)  in pf_exit()
1074 			pi_release(pf->pi);  in pf_exit()