1 // SPDX-License-Identifier: GPL-2.0-or-later
16 #include <linux/dma-mapping.h>
20 #include <linux/blk-mq.h>
80 	{UNIT_ATTENTION, "Device needs attention - disk may have been changed"},
159 	* been hit by a serious failure - but we'll  in gdrom_identifydevice()
160 	* try to return a sense key even so */  in gdrom_identifydevice()
233 		return -ENOMEM;  in gdrom_preparedisk_cmd()
234 	spin_command->cmd[0] = 0x70;  in gdrom_preparedisk_cmd()
235 	spin_command->cmd[2] = 0x1f;  in gdrom_preparedisk_cmd()
236 	spin_command->buflen = 0;  in gdrom_preparedisk_cmd()
247 		return -EIO;  in gdrom_preparedisk_cmd()
267 		return -ENOMEM;  in gdrom_readtoc_cmd()
269 	toc_command->cmd[0] = 0x14;  in gdrom_readtoc_cmd()
270 	toc_command->cmd[1] = session;  in gdrom_readtoc_cmd()
271 	toc_command->cmd[3] = tocsize >> 8;  in gdrom_readtoc_cmd()
272 	toc_command->cmd[4] = tocsize & 0xff;  in gdrom_readtoc_cmd()
273 	toc_command->buflen = tocsize;  in gdrom_readtoc_cmd()
275 		err = -EBUSY;  in gdrom_readtoc_cmd()
283 		err = -EINVAL;  in gdrom_readtoc_cmd()
288 		err = -EINVAL;  in gdrom_readtoc_cmd()
300 	return (cpu_to_be32(track & 0xffffff00) - GD_SESSION_OFFSET);  in get_entry_lba()
319 		return -ENOMEM;  in gdrom_get_last_session()
321 	/* Check if GD-ROM */  in gdrom_get_last_session()
323 	/* Not a GD-ROM so check if standard CD-ROM */  in gdrom_get_last_session()
328 			return -ENXIO;  in gdrom_get_last_session()
332 	fentry = get_entry_track(gd.toc->first);  in gdrom_get_last_session()
333 	lentry = get_entry_track(gd.toc->last);  in gdrom_get_last_session()
335 	track = get_entry_track(gd.toc->last);  in gdrom_get_last_session()
337 		data = gd.toc->entry[track - 1];  in gdrom_get_last_session()
340 		track--;  in gdrom_get_last_session()
343 	if ((track > 100) || (track < get_entry_track(gd.toc->first))) {  in gdrom_get_last_session()
346 		return -ENXIO;  in gdrom_get_last_session()
349 	ms_info->addr_format = CDROM_LBA;  in gdrom_get_last_session()
350 	ms_info->addr.lba = get_entry_lba(data);  in gdrom_get_last_session()
351 	ms_info->xa_flag = 1;  in gdrom_get_last_session()
368 	/* read the sense key */  in gdrom_drivestatus()
369 	char sense = __raw_readb(GDROM_ERROR_REG);  in gdrom_drivestatus()  local
370 	sense &= 0xF0;  in gdrom_drivestatus()
371 	if (sense == 0)  in gdrom_drivestatus()
373 	if (sense == 0x20)  in gdrom_drivestatus()
382 	/* check the sense key */  in gdrom_check_events()
398  * CD Rom specification  - returning int */
402 	gdrom_spicommand(&command->cmd, command->buflen);  in gdrom_packetcommand()
406 /* Get Sense SPI command
415 	short sense[5];  in gdrom_getsense()  local
417 	int err = -EIO;  in gdrom_getsense()
421 		return -ENOMEM;  in gdrom_getsense()
422 	sense_command->cmd[0] = 0x13;  in gdrom_getsense()
423 	sense_command->cmd[4] = 10;  in gdrom_getsense()
424 	sense_command->buflen = 10;  in gdrom_getsense()
426 	* the sense key if possible */  in gdrom_getsense()
428 		err = -EBUSY;  in gdrom_getsense()
437 	insw(GDROM_DATA_REG, &sense, sense_command->buflen/2);  in gdrom_getsense()
438 	if (sense[1] & 40) {  in gdrom_getsense()
439 		pr_info("Drive not ready - command aborted\n");  in gdrom_getsense()
442 	sense_key = sense[1] & 0x0F;  in gdrom_getsense()
446 		pr_err("Unknown sense key: %d\n", sense_key);  in gdrom_getsense()
447 	if (bufstring) /* return addional sense data */  in gdrom_getsense()
448 		memcpy(bufstring, &sense[4], 2);  in gdrom_getsense()
462 	return -EINVAL;  in gdrom_audio_ioctl()
478 static int gdrom_bdops_open(struct block_device *bdev, fmode_t mode)  in gdrom_bdops_open()  argument
485 	ret = cdrom_open(gd.cd_info, bdev, mode);  in gdrom_bdops_open()
490 static void gdrom_bdops_release(struct gendisk *disk, fmode_t mode)  in gdrom_bdops_release()  argument
493 	cdrom_release(gd.cd_info, mode);  in gdrom_bdops_release()
503 static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,  in gdrom_bdops_ioctl()  argument
509 	ret = cdrom_ioctl(gd.cd_info, bdev, mode, cmd, arg);  in gdrom_bdops_ioctl()
562  * 0 -> 0x30
563  * 1 -> mode
564  * 2 -> block >> 16
565  * 3 -> block >> 8
566  * 4 -> block
567  * 8 -> sectors >> 16
568  * 9 -> sectors >> 8
569  * 10 -> sectors
582 	read_command->cmd[0] = 0x30;  in gdrom_readdisk_dma()
583 	read_command->cmd[1] = 0x20;  in gdrom_readdisk_dma()
586 	__raw_writel(virt_to_phys(bio_data(req->bio)), GDROM_DMA_STARTADDR_REG);  in gdrom_readdisk_dma()
590 	read_command->cmd[2] = (block >> 16) & 0xFF;  in gdrom_readdisk_dma()
591 	read_command->cmd[3] = (block >> 8) & 0xFF;  in gdrom_readdisk_dma()
592 	read_command->cmd[4] = block & 0xFF;  in gdrom_readdisk_dma()
593 	read_command->cmd[8] = (block_cnt >> 16) & 0xFF;  in gdrom_readdisk_dma()
594 	read_command->cmd[9] = (block_cnt >> 8) & 0xFF;  in gdrom_readdisk_dma()
595 	read_command->cmd[10] = block_cnt & 0xFF;  in gdrom_readdisk_dma()
615 	outsw(GDROM_DATA_REG, &read_command->cmd, 6);  in gdrom_readdisk_dma()
637 	blk_mq_start_request(bd->rq);  in gdrom_queue_rq()
639 	switch (req_op(bd->rq)) {  in gdrom_queue_rq()
641 		return gdrom_readdisk_dma(bd->rq);  in gdrom_queue_rq()
643 		pr_notice("Read only device - write request ignored\n");  in gdrom_queue_rq()
646 		printk(KERN_DEBUG "gdrom: Non-fs request ignored\n");  in gdrom_queue_rq()
656 	int err = -ENOMEM;  in gdrom_outputversion()
663 	model_name = kstrndup(id->modname, 16, GFP_KERNEL);  in gdrom_outputversion()
666 	manuf_name = kstrndup(id->mname, 16, GFP_KERNEL);  in gdrom_outputversion()
669 	firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);  in gdrom_outputversion()
685 /* set the default mode for DMA transfer */
691 		return -EBUSY;  in gdrom_init_dma_mode()
694 		return -EBUSY;  in gdrom_init_dma_mode()
696 	* Bits 31 - 16 security: 0x8843  in gdrom_init_dma_mode()
698 	* Bits 14 - 8 start of transfer range in 1 MB blocks OR'ed with 0x80  in gdrom_init_dma_mode()
699 	* Bits 6 - 0 end of transfer range in 1 MB blocks OR'ed with 0x80  in gdrom_init_dma_mode()
709 	gd.cd_info->ops = &gdrom_ops;  in probe_gdrom_setupcd()
710 	gd.cd_info->capacity = 1;  in probe_gdrom_setupcd()
711 	strcpy(gd.cd_info->name, GDROM_DEV_NAME);  in probe_gdrom_setupcd()
712 	gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|  in probe_gdrom_setupcd()
718 	gd.disk->major = gdrom_major;  in probe_gdrom_setupdisk()
719 	gd.disk->first_minor = 1;  in probe_gdrom_setupdisk()
720 	gd.disk->minors = 1;  in probe_gdrom_setupdisk()
721 	strcpy(gd.disk->disk_name, GDROM_DEV_NAME);  in probe_gdrom_setupdisk()
731 	gd.disk->queue = gd.gdrom_rq;  in probe_gdrom_setupqueue()
749 		return -ENODEV;  in probe_gdrom()
753 		return -ENOMEM;  in probe_gdrom()
763 		err = -ENOMEM;  in probe_gdrom()
769 		err = -ENODEV;  in probe_gdrom()
774 		err = -ENODEV;  in probe_gdrom()
777 	gd.disk->fops = &gdrom_bdops;  in probe_gdrom()
778 	gd.disk->events = DISK_EVENT_MEDIA_CHANGE;  in probe_gdrom()
800 		err = -ENOMEM;  in probe_gdrom()
820 	pr_warn("Probe failed - error is 0x%X\n", err);  in probe_gdrom()
853 	pd = platform_device_register_simple(GDROM_DEV_NAME, -1, NULL, 0);  in init_gdrom()
872 MODULE_DESCRIPTION("SEGA Dreamcast GD-ROM Driver");