247 static int pf_identify(struct pf_unit *pf);
248 static void pf_lock(struct pf_unit *pf, int func);
249 static void pf_eject(struct pf_unit *pf);
289 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_open()  local
293 	pf_identify(pf);  in pf_open()
296 	if (pf->media_status == PF_NM)  in pf_open()
300 	if ((pf->media_status == PF_RO) && (mode & FMODE_WRITE))  in pf_open()
304 	pf->access++;  in pf_open()
305 	if (pf->removable)  in pf_open()
306 		pf_lock(pf, 1);  in pf_open()
314 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_getgeo()  local
315 	sector_t capacity = get_capacity(pf->disk);  in pf_getgeo()
332 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_ioctl()  local
337 	if (pf->access != 1)  in pf_ioctl()
340 	pf_eject(pf);  in pf_ioctl()
348 	struct pf_unit *pf = disk->private_data;  in pf_release()  local
351 	if (pf->access <= 0) {  in pf_release()
357 	pf->access--;  in pf_release()
359 	if (!pf->access && pf->removable)  in pf_release()
360 		pf_lock(pf, 0);  in pf_release()
370 static inline int status_reg(struct pf_unit *pf)  in status_reg()  argument
372 	return pi_read_regr(pf->pi, 1, 6);  in status_reg()
375 static inline int read_reg(struct pf_unit *pf, int reg)  in read_reg()  argument
377 	return pi_read_regr(pf->pi, 0, reg);  in read_reg()
380 static inline void write_reg(struct pf_unit *pf, int reg, int val)  in write_reg()  argument
382 	pi_write_regr(pf->pi, 0, reg, val);  in write_reg()
385 static int pf_wait(struct pf_unit *pf, int go, int stop, char *fun, char *msg)  in pf_wait()  argument
390 	while ((((r = status_reg(pf)) & go) || (stop && (!(r & stop))))  in pf_wait()
395 		s = read_reg(pf, 7);  in pf_wait()
396 		e = read_reg(pf, 1);  in pf_wait()
397 		p = read_reg(pf, 2);  in pf_wait()
403 			       pf->name, fun, msg, r, s, e, j, p);  in pf_wait()
409 static int pf_command(struct pf_unit *pf, char *cmd, int dlen, char *fun)  in pf_command()  argument
411 	pi_connect(pf->pi);  in pf_command()
413 	write_reg(pf, 6, 0xa0+0x10*pf->drive);  in pf_command()
415 	if (pf_wait(pf, STAT_BUSY | STAT_DRQ, 0, fun, "before command")) {  in pf_command()
416 		pi_disconnect(pf->pi);  in pf_command()
420 	write_reg(pf, 4, dlen % 256);  in pf_command()
421 	write_reg(pf, 5, dlen / 256);  in pf_command()
422 	write_reg(pf, 7, 0xa0);	/* ATAPI packet command */  in pf_command()
424 	if (pf_wait(pf, STAT_BUSY, STAT_DRQ, fun, "command DRQ")) {  in pf_command()
425 		pi_disconnect(pf->pi);  in pf_command()
429 	if (read_reg(pf, 2) != 1) {  in pf_command()
430 		printk("%s: %s: command phase error\n", pf->name, fun);  in pf_command()
431 		pi_disconnect(pf->pi);  in pf_command()
435 	pi_write_block(pf->pi, cmd, 12);  in pf_command()
440 static int pf_completion(struct pf_unit *pf, char *buf, char *fun)  in pf_completion()  argument
444 	r = pf_wait(pf, STAT_BUSY, STAT_DRQ | STAT_READY | STAT_ERR,  in pf_completion()
447 	if ((read_reg(pf, 2) & 2) && (read_reg(pf, 7) & STAT_DRQ)) {  in pf_completion()
448 		n = (((read_reg(pf, 4) + 256 * read_reg(pf, 5)) +  in pf_completion()
450 		pi_read_block(pf->pi, buf, n);  in pf_completion()
453 	s = pf_wait(pf, STAT_BUSY, STAT_READY | STAT_ERR, fun, "data done");  in pf_completion()
455 	pi_disconnect(pf->pi);  in pf_completion()
460 static void pf_req_sense(struct pf_unit *pf, int quiet)  in pf_req_sense()  argument
463 	    { ATAPI_REQ_SENSE, pf->lun << 5, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };  in pf_req_sense()
467 	r = pf_command(pf, rs_cmd, 16, "Request sense");  in pf_req_sense()
470 		pf_completion(pf, buf, "Request sense");  in pf_req_sense()
474 		       pf->name, buf[2] & 0xf, buf[12], buf[13]);  in pf_req_sense()
477 static int pf_atapi(struct pf_unit *pf, char *cmd, int dlen, char *buf, char *fun)  in pf_atapi()  argument
481 	r = pf_command(pf, cmd, dlen, fun);  in pf_atapi()
484 		r = pf_completion(pf, buf, fun);  in pf_atapi()
486 		pf_req_sense(pf, !fun);  in pf_atapi()
491 static void pf_lock(struct pf_unit *pf, int func)  in pf_lock()  argument
493 	char lo_cmd[12] = { ATAPI_LOCK, pf->lun << 5, 0, 0, func, 0, 0, 0, 0, 0, 0, 0 };  in pf_lock()
495 	pf_atapi(pf, lo_cmd, 0, pf_scratch, func ? "lock" : "unlock");  in pf_lock()
498 static void pf_eject(struct pf_unit *pf)  in pf_eject()  argument
500 	char ej_cmd[12] = { ATAPI_DOOR, pf->lun << 5, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };  in pf_eject()
502 	pf_lock(pf, 0);  in pf_eject()
503 	pf_atapi(pf, ej_cmd, 0, pf_scratch, "eject");  in pf_eject()
518 static int pf_reset(struct pf_unit *pf)  in pf_reset()  argument
523 	pi_connect(pf->pi);  in pf_reset()
524 	write_reg(pf, 6, 0xa0+0x10*pf->drive);  in pf_reset()
525 	write_reg(pf, 7, 8);  in pf_reset()
530 	while ((k++ < PF_RESET_TMO) && (status_reg(pf) & STAT_BUSY))  in pf_reset()
535 		flg &= (read_reg(pf, i + 1) == expect[i]);  in pf_reset()
538 		printk("%s: Reset (%d) signature = ", pf->name, k);  in pf_reset()
540 			printk("%3x", read_reg(pf, i + 1));  in pf_reset()
546 	pi_disconnect(pf->pi);  in pf_reset()
550 static void pf_mode_sense(struct pf_unit *pf)  in pf_mode_sense()  argument
553 	    { ATAPI_MODE_SENSE, pf->lun << 5, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0 };  in pf_mode_sense()
556 	pf_atapi(pf, ms_cmd, 8, buf, "mode sense");  in pf_mode_sense()
557 	pf->media_status = PF_RW;  in pf_mode_sense()
559 		pf->media_status = PF_RO;  in pf_mode_sense()
586 static void pf_get_capacity(struct pf_unit *pf)  in pf_get_capacity()  argument
588 	char rc_cmd[12] = { ATAPI_CAPACITY, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  in pf_get_capacity()
592 	if (pf_atapi(pf, rc_cmd, 8, buf, "get capacity")) {  in pf_get_capacity()
593 		pf->media_status = PF_NM;  in pf_get_capacity()
596 	set_capacity(pf->disk, xl(buf, 0) + 1);  in pf_get_capacity()
599 		set_capacity(pf->disk, 0);  in pf_get_capacity()
603 			       pf->name, pf->drive, pf->lun, bs);  in pf_get_capacity()
607 static int pf_identify(struct pf_unit *pf)  in pf_identify()  argument
613 	    { ATAPI_IDENTIFY, pf->lun << 5, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };  in pf_identify()
616 	s = pf_atapi(pf, id_cmd, 36, buf, "identify");  in pf_identify()
624 			       pf->name, pf->drive, pf->lun, dt);  in pf_identify()
631 	pf->removable = (buf[1] & 0x80);  in pf_identify()
633 	pf_mode_sense(pf);  in pf_identify()
634 	pf_mode_sense(pf);  in pf_identify()
635 	pf_mode_sense(pf);  in pf_identify()
637 	pf_get_capacity(pf);  in pf_identify()
640 	       pf->name, mf, id, ms[pf->drive], pf->lun, dt);  in pf_identify()
641 	if (pf->removable)  in pf_identify()
643 	if (pf->media_status == PF_NM)  in pf_identify()
646 		if (pf->media_status == PF_RO)  in pf_identify()
649 			(unsigned long long)get_capacity(pf->disk));  in pf_identify()
657 static int pf_probe(struct pf_unit *pf)  in pf_probe()  argument
659 	if (pf->drive == -1) {  in pf_probe()
660 		for (pf->drive = 0; pf->drive <= 1; pf->drive++)  in pf_probe()
661 			if (!pf_reset(pf)) {  in pf_probe()
662 				if (pf->lun != -1)  in pf_probe()
663 					return pf_identify(pf);  in pf_probe()
665 					for (pf->lun = 0; pf->lun < 8; pf->lun++)  in pf_probe()
666 						if (!pf_identify(pf))  in pf_probe()
670 		if (pf_reset(pf))  in pf_probe()
672 		if (pf->lun != -1)  in pf_probe()
673 			return pf_identify(pf);  in pf_probe()
674 		for (pf->lun = 0; pf->lun < 8; pf->lun++)  in pf_probe()
675 			if (!pf_identify(pf))  in pf_probe()
683 static int pf_start(struct pf_unit *pf, int cmd, int b, int c)  in pf_start()  argument
686 	char io_cmd[12] = { cmd, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  in pf_start()
696 	i = pf_command(pf, io_cmd, c * 512, "start i/o");  in pf_start()
712 	struct pf_unit *pf;  in set_next_request()  local
716 		pf = &units[pf_queue];  in set_next_request()
719 		if (pf->present && !list_empty(&pf->rq_list)) {  in set_next_request()
720 			pf_req = list_first_entry(&pf->rq_list, struct request,  in set_next_request()
778 	struct pf_unit *pf = hctx->queue->queuedata;  in pf_queue_rq()  local
781 	list_add_tail(&bd->rq->queuelist, &pf->rq_list);  in pf_queue_rq()
924 static int __init pf_init_unit(struct pf_unit *pf, bool autoprobe, int port,  in pf_init_unit()  argument
930 	ret = blk_mq_alloc_sq_tag_set(&pf->tag_set, &pf_mq_ops, 1,  in pf_init_unit()
935 	disk = blk_mq_alloc_disk(&pf->tag_set, pf);  in pf_init_unit()
941 	disk->first_minor = pf - units;  in pf_init_unit()
943 	strcpy(disk->disk_name, pf->name);  in pf_init_unit()
947 	disk->private_data = pf;  in pf_init_unit()
952 	INIT_LIST_HEAD(&pf->rq_list);  in pf_init_unit()
953 	pf->disk = disk;  in pf_init_unit()
954 	pf->pi = &pf->pia;  in pf_init_unit()
955 	pf->media_status = PF_NM;  in pf_init_unit()
956 	pf->drive = (*drives[disk->first_minor])[D_SLV];  in pf_init_unit()
957 	pf->lun = (*drives[disk->first_minor])[D_LUN];  in pf_init_unit()
958 	snprintf(pf->name, PF_NAMELEN, "%s%d", name, disk->first_minor);  in pf_init_unit()
960 	if (!pi_init(pf->pi, autoprobe, port, mode, unit, protocol, delay,  in pf_init_unit()
961 			pf_scratch, PI_PF, verbose, pf->name)) {  in pf_init_unit()
965 	ret = pf_probe(pf);  in pf_init_unit()
972 	pf->present = 1;  in pf_init_unit()
976 	pi_release(pf->pi);  in pf_init_unit()
978 	put_disk(pf->disk);  in pf_init_unit()
980 	blk_mq_free_tag_set(&pf->tag_set);  in pf_init_unit()
986 	struct pf_unit *pf;  in pf_init()  local
1009 	pf = units;  in pf_init()
1011 		if (pf_init_unit(pf, 1, -1, -1, -1, -1, -1, verbose))  in pf_init()
1014 		for (unit = 0; unit < PF_UNITS; unit++, pf++) {  in pf_init()
1018 			if (pf_init_unit(pf, 0, conf[D_PRT], conf[D_MOD],  in pf_init()
1040 	struct pf_unit *pf;  in pf_exit()  local
1043 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_exit()
1044 		if (!pf->present)  in pf_exit()
1046 		del_gendisk(pf->disk);  in pf_exit()
1047 		put_disk(pf->disk);  in pf_exit()
1048 		blk_mq_free_tag_set(&pf->tag_set);  in pf_exit()
1049 		pi_release(pf->pi);  in pf_exit()