245 static int pf_identify(struct pf_unit *pf);
246 static void pf_lock(struct pf_unit *pf, int func);
247 static void pf_eject(struct pf_unit *pf);
282 	struct pf_unit *pf;  in pf_init_units()  local
286 	for (unit = 0, pf = units; unit < PF_UNITS; unit++, pf++) {  in pf_init_units()
297 		pf->disk = disk;  in pf_init_units()
298 		pf->pi = &pf->pia;  in pf_init_units()
299 		pf->media_status = PF_NM;  in pf_init_units()
300 		pf->drive = (*drives[unit])[D_SLV];  in pf_init_units()
301 		pf->lun = (*drives[unit])[D_LUN];  in pf_init_units()
302 		snprintf(pf->name, PF_NAMELEN, "%s%d", name, unit);  in pf_init_units()
305 		strcpy(disk->disk_name, pf->name);  in pf_init_units()
314 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_open()  local
318 	pf_identify(pf);  in pf_open()
321 	if (pf->media_status == PF_NM)  in pf_open()
325 	if ((pf->media_status == PF_RO) && (mode & FMODE_WRITE))  in pf_open()
329 	pf->access++;  in pf_open()
330 	if (pf->removable)  in pf_open()
331 		pf_lock(pf, 1);  in pf_open()
339 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_getgeo()  local
340 	sector_t capacity = get_capacity(pf->disk);  in pf_getgeo()
357 	struct pf_unit *pf = bdev->bd_disk->private_data;  in pf_ioctl()  local
362 	if (pf->access != 1)  in pf_ioctl()
365 	pf_eject(pf);  in pf_ioctl()
373 	struct pf_unit *pf = disk->private_data;  in pf_release()  local
376 	if (pf->access <= 0) {  in pf_release()
382 	pf->access--;  in pf_release()
384 	if (!pf->access && pf->removable)  in pf_release()
385 		pf_lock(pf, 0);  in pf_release()
395 static inline int status_reg(struct pf_unit *pf)  in status_reg()  argument
397 	return pi_read_regr(pf->pi, 1, 6);  in status_reg()
400 static inline int read_reg(struct pf_unit *pf, int reg)  in read_reg()  argument
402 	return pi_read_regr(pf->pi, 0, reg);  in read_reg()
405 static inline void write_reg(struct pf_unit *pf, int reg, int val)  in write_reg()  argument
407 	pi_write_regr(pf->pi, 0, reg, val);  in write_reg()
410 static int pf_wait(struct pf_unit *pf, int go, int stop, char *fun, char *msg)  in pf_wait()  argument
415 	while ((((r = status_reg(pf)) & go) || (stop && (!(r & stop))))  in pf_wait()
420 		s = read_reg(pf, 7);  in pf_wait()
421 		e = read_reg(pf, 1);  in pf_wait()
422 		p = read_reg(pf, 2);  in pf_wait()
428 			       pf->name, fun, msg, r, s, e, j, p);  in pf_wait()
434 static int pf_command(struct pf_unit *pf, char *cmd, int dlen, char *fun)  in pf_command()  argument
436 	pi_connect(pf->pi);  in pf_command()
438 	write_reg(pf, 6, 0xa0+0x10*pf->drive);  in pf_command()
440 	if (pf_wait(pf, STAT_BUSY | STAT_DRQ, 0, fun, "before command")) {  in pf_command()
441 		pi_disconnect(pf->pi);  in pf_command()
445 	write_reg(pf, 4, dlen % 256);  in pf_command()
446 	write_reg(pf, 5, dlen / 256);  in pf_command()
447 	write_reg(pf, 7, 0xa0);	/* ATAPI packet command */  in pf_command()
449 	if (pf_wait(pf, STAT_BUSY, STAT_DRQ, fun, "command DRQ")) {  in pf_command()
450 		pi_disconnect(pf->pi);  in pf_command()
454 	if (read_reg(pf, 2) != 1) {  in pf_command()
455 		printk("%s: %s: command phase error\n", pf->name, fun);  in pf_command()
456 		pi_disconnect(pf->pi);  in pf_command()
460 	pi_write_block(pf->pi, cmd, 12);  in pf_command()
465 static int pf_completion(struct pf_unit *pf, char *buf, char *fun)  in pf_completion()  argument
469 	r = pf_wait(pf, STAT_BUSY, STAT_DRQ | STAT_READY | STAT_ERR,  in pf_completion()
472 	if ((read_reg(pf, 2) & 2) && (read_reg(pf, 7) & STAT_DRQ)) {  in pf_completion()
473 		n = (((read_reg(pf, 4) + 256 * read_reg(pf, 5)) +  in pf_completion()
475 		pi_read_block(pf->pi, buf, n);  in pf_completion()
478 	s = pf_wait(pf, STAT_BUSY, STAT_READY | STAT_ERR, fun, "data done");  in pf_completion()
480 	pi_disconnect(pf->pi);  in pf_completion()
485 static void pf_req_sense(struct pf_unit *pf, int quiet)  in pf_req_sense()  argument
488 	    { ATAPI_REQ_SENSE, pf->lun << 5, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };  in pf_req_sense()
492 	r = pf_command(pf, rs_cmd, 16, "Request sense");  in pf_req_sense()
495 		pf_completion(pf, buf, "Request sense");  in pf_req_sense()
499 		       pf->name, buf[2] & 0xf, buf[12], buf[13]);  in pf_req_sense()
502 static int pf_atapi(struct pf_unit *pf, char *cmd, int dlen, char *buf, char *fun)  in pf_atapi()  argument
506 	r = pf_command(pf, cmd, dlen, fun);  in pf_atapi()
509 		r = pf_completion(pf, buf, fun);  in pf_atapi()
511 		pf_req_sense(pf, !fun);  in pf_atapi()
516 static void pf_lock(struct pf_unit *pf, int func)  in pf_lock()  argument
518 	char lo_cmd[12] = { ATAPI_LOCK, pf->lun << 5, 0, 0, func, 0, 0, 0, 0, 0, 0, 0 };  in pf_lock()
520 	pf_atapi(pf, lo_cmd, 0, pf_scratch, func ? "lock" : "unlock");  in pf_lock()
523 static void pf_eject(struct pf_unit *pf)  in pf_eject()  argument
525 	char ej_cmd[12] = { ATAPI_DOOR, pf->lun << 5, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };  in pf_eject()
527 	pf_lock(pf, 0);  in pf_eject()
528 	pf_atapi(pf, ej_cmd, 0, pf_scratch, "eject");  in pf_eject()
543 static int pf_reset(struct pf_unit *pf)  in pf_reset()  argument
548 	pi_connect(pf->pi);  in pf_reset()
549 	write_reg(pf, 6, 0xa0+0x10*pf->drive);  in pf_reset()
550 	write_reg(pf, 7, 8);  in pf_reset()
555 	while ((k++ < PF_RESET_TMO) && (status_reg(pf) & STAT_BUSY))  in pf_reset()
560 		flg &= (read_reg(pf, i + 1) == expect[i]);  in pf_reset()
563 		printk("%s: Reset (%d) signature = ", pf->name, k);  in pf_reset()
565 			printk("%3x", read_reg(pf, i + 1));  in pf_reset()
571 	pi_disconnect(pf->pi);  in pf_reset()
575 static void pf_mode_sense(struct pf_unit *pf)  in pf_mode_sense()  argument
578 	    { ATAPI_MODE_SENSE, pf->lun << 5, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0 };  in pf_mode_sense()
581 	pf_atapi(pf, ms_cmd, 8, buf, "mode sense");  in pf_mode_sense()
582 	pf->media_status = PF_RW;  in pf_mode_sense()
584 		pf->media_status = PF_RO;  in pf_mode_sense()
611 static void pf_get_capacity(struct pf_unit *pf)  in pf_get_capacity()  argument
613 	char rc_cmd[12] = { ATAPI_CAPACITY, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  in pf_get_capacity()
617 	if (pf_atapi(pf, rc_cmd, 8, buf, "get capacity")) {  in pf_get_capacity()
618 		pf->media_status = PF_NM;  in pf_get_capacity()
621 	set_capacity(pf->disk, xl(buf, 0) + 1);  in pf_get_capacity()
624 		set_capacity(pf->disk, 0);  in pf_get_capacity()
628 			       pf->name, pf->drive, pf->lun, bs);  in pf_get_capacity()
632 static int pf_identify(struct pf_unit *pf)  in pf_identify()  argument
638 	    { ATAPI_IDENTIFY, pf->lun << 5, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };  in pf_identify()
641 	s = pf_atapi(pf, id_cmd, 36, buf, "identify");  in pf_identify()
649 			       pf->name, pf->drive, pf->lun, dt);  in pf_identify()
656 	pf->removable = (buf[1] & 0x80);  in pf_identify()
658 	pf_mode_sense(pf);  in pf_identify()
659 	pf_mode_sense(pf);  in pf_identify()
660 	pf_mode_sense(pf);  in pf_identify()
662 	pf_get_capacity(pf);  in pf_identify()
665 	       pf->name, mf, id, ms[pf->drive], pf->lun, dt);  in pf_identify()
666 	if (pf->removable)  in pf_identify()
668 	if (pf->media_status == PF_NM)  in pf_identify()
671 		if (pf->media_status == PF_RO)  in pf_identify()
674 			(unsigned long long)get_capacity(pf->disk));  in pf_identify()
682 static int pf_probe(struct pf_unit *pf)  in pf_probe()  argument
684 	if (pf->drive == -1) {  in pf_probe()
685 		for (pf->drive = 0; pf->drive <= 1; pf->drive++)  in pf_probe()
686 			if (!pf_reset(pf)) {  in pf_probe()
687 				if (pf->lun != -1)  in pf_probe()
688 					return pf_identify(pf);  in pf_probe()
690 					for (pf->lun = 0; pf->lun < 8; pf->lun++)  in pf_probe()
691 						if (!pf_identify(pf))  in pf_probe()
695 		if (pf_reset(pf))  in pf_probe()
697 		if (pf->lun != -1)  in pf_probe()
698 			return pf_identify(pf);  in pf_probe()
699 		for (pf->lun = 0; pf->lun < 8; pf->lun++)  in pf_probe()
700 			if (!pf_identify(pf))  in pf_probe()
708 	struct pf_unit *pf = units;  in pf_detect()  local
721 		if (pi_init(pf->pi, 1, -1, -1, -1, -1, -1, pf_scratch, PI_PF,  in pf_detect()
722 			    verbose, pf->name)) {  in pf_detect()
723 			if (!pf_probe(pf) && pf->disk) {  in pf_detect()
724 				pf->present = 1;  in pf_detect()
727 				pi_release(pf->pi);  in pf_detect()
731 		for (unit = 0; unit < PF_UNITS; unit++, pf++) {  in pf_detect()
735 			if (pi_init(pf->pi, 0, conf[D_PRT], conf[D_MOD],  in pf_detect()
737 				    pf_scratch, PI_PF, verbose, pf->name)) {  in pf_detect()
738 				if (pf->disk && !pf_probe(pf)) {  in pf_detect()
739 					pf->present = 1;  in pf_detect()
742 					pi_release(pf->pi);  in pf_detect()
749 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++)  in pf_detect()
750 		put_disk(pf->disk);  in pf_detect()
757 static int pf_start(struct pf_unit *pf, int cmd, int b, int c)  in pf_start()  argument
760 	char io_cmd[12] = { cmd, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };  in pf_start()
770 	i = pf_command(pf, io_cmd, c * 512, "start i/o");  in pf_start()
786 	struct pf_unit *pf;  in set_next_request()  local
791 		pf = &units[pf_queue];  in set_next_request()
792 		q = pf->present ? pf->disk->queue : NULL;  in set_next_request()
988 	struct pf_unit *pf;  in pf_init()  local
1001 		for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++)  in pf_init()
1002 			put_disk(pf->disk);  in pf_init()
1006 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_init()
1007 		struct gendisk *disk = pf->disk;  in pf_init()
1009 		if (!pf->present)  in pf_init()
1011 		disk->private_data = pf;  in pf_init()
1019 	struct pf_unit *pf;  in pf_exit()  local
1022 	for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {  in pf_exit()
1023 		if (!pf->present)  in pf_exit()
1025 		del_gendisk(pf->disk);  in pf_exit()
1026 		blk_cleanup_queue(pf->disk->queue);  in pf_exit()
1027 		put_disk(pf->disk);  in pf_exit()
1028 		pi_release(pf->pi);  in pf_exit()