1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_via.c 	- VIA PATA for new ATA layer
4  *			  (C) 2005-2006 Red Hat Inc
10  *	VIA VT82C561	-	early design, uses ata_generic currently
11  *	VIA VT82C576	-	MWDMA, 33Mhz
12  *	VIA VT82C586	-	MWDMA, 33Mhz
13  *	VIA VT82C586a	-	Added UDMA to 33Mhz
14  *	VIA VT82C586b	-	UDMA33
15  *	VIA VT82C596a	-	Nonfunctional UDMA66
16  *	VIA VT82C596b	-	Working UDMA66
17  *	VIA VT82C686	-	Nonfunctional UDMA66
18  *	VIA VT82C686a	-	Working UDMA66
19  *	VIA VT82C686b	-	Updated to UDMA100
20  *	VIA VT8231	-	UDMA100
21  *	VIA VT8233	-	UDMA100
22  *	VIA VT8233a	-	UDMA133
23  *	VIA VT8233c	-	UDMA100
24  *	VIA VT8235	-	UDMA133
25  *	VIA VT8237	-	UDMA133
26  *	VIA VT8237A	-	UDMA133
27  *	VIA VT8237S	-	UDMA133
28  *	VIA VT8251	-	UDMA133
47  * Copyright (c) 2000-2002 Vojtech Pavlik
162 	/* Arima W730-K8/Targa Visionary 811/... */  in via_cable_override()
163 	if (pdev->subsystem_vendor == 0x161F && pdev->subsystem_device == 0x2032)  in via_cable_override()
170  *	via_cable_detect	-	cable detection
175  *	BIOS. If you are using an 8235 in a non-PC configuration you
182 	const struct via_isa_bridge *config = ap->host->private_data;  in via_cable_detect()
183 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in via_cable_detect()
189 	if ((config->flags & VIA_SATA_PATA) && ap->port_no == 0)  in via_cable_detect()
193 	if (config->udma_mask < ATA_UDMA4)  in via_cable_detect()
195 	/* UDMA 66 chips have only drive side logic */  in via_cable_detect()
196 	else if (config->udma_mask < ATA_UDMA5)  in via_cable_detect()
198 	/* UDMA 100 or later */  in via_cable_detect()
202 	if (ata66 & (0x10100000 >> (16 * ap->port_no)))  in via_cable_detect()
213 	struct ata_port *ap = link->ap;  in via_pre_reset()
214 	const struct via_isa_bridge *config = ap->host->private_data;  in via_pre_reset()
216 	if (!(config->flags & VIA_NO_ENABLES)) {  in via_pre_reset()
221 		struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in via_pre_reset()
222 		if (!pci_test_config_bits(pdev, &via_enable_bits[ap->port_no]))  in via_pre_reset()
223 			return -ENOENT;  in via_pre_reset()
231  *	via_do_set_mode	-	set transfer mode data
236  *	@udma_type: UDMA mode/format of registers
248 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in via_do_set_mode()
250 	struct ata_timing t, p;  in via_do_set_mode()  local
255 	int offset = 3 - (2*ap->port_no) - adev->devno;  in via_do_set_mode()
271 		if (peer->pio_mode) {  in via_do_set_mode()
272 			ata_timing_compute(peer, peer->pio_mode, &p, T, UT);  in via_do_set_mode()
273 			ata_timing_merge(&p, &t, &t, ATA_TIMING_8BIT);  in via_do_set_mode()
284 		setup |= (clamp_val(t.setup, 1, 4) - 1) << shift;  in via_do_set_mode()
289 	pci_write_config_byte(pdev, 0x4F - ap->port_no,  in via_do_set_mode()
290 		((clamp_val(t.act8b, 1, 16) - 1) << 4) | (clamp_val(t.rec8b, 1, 16) - 1));  in via_do_set_mode()
292 		((clamp_val(t.active, 1, 16) - 1) << 4) | (clamp_val(t.recover, 1, 16) - 1));  in via_do_set_mode()
294 	/* Load the UDMA bits according to type */  in via_do_set_mode()
298 		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 5) - 2)) : 0x03;  in via_do_set_mode()
301 		ut = t.udma ? (0xe8 | (clamp_val(t.udma, 2, 9) - 2)) : 0x0f;  in via_do_set_mode()
304 		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;  in via_do_set_mode()
307 		ut = t.udma ? (0xe0 | (clamp_val(t.udma, 2, 9) - 2)) : 0x07;  in via_do_set_mode()
311 	/* Set UDMA unless device is not UDMA capable */  in via_do_set_mode()
320 		if (t.udma) {  in via_do_set_mode()
321 			/* preserve 80-wire cable detection bit */  in via_do_set_mode()
332 	const struct via_isa_bridge *config = ap->host->private_data;  in via_set_piomode()
333 	int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;  in via_set_piomode()
335 	via_do_set_mode(ap, adev, adev->pio_mode, set_ast, config->udma_mask);  in via_set_piomode()
340 	const struct via_isa_bridge *config = ap->host->private_data;  in via_set_dmamode()
341 	int set_ast = (config->flags & VIA_BAD_AST) ? 0 : 1;  in via_set_dmamode()
343 	via_do_set_mode(ap, adev, adev->dma_mode, set_ast, config->udma_mask);  in via_set_dmamode()
347  *	via_mode_filter		-	filter buggy device/mode pairs
357 	struct ata_host *host = dev->link->ap->host;  in via_mode_filter()
358 	const struct via_isa_bridge *config = host->private_data;  in via_mode_filter()
361 	if (config->id == PCI_DEVICE_ID_VIA_82C586_0) {  in via_mode_filter()
362 		ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));  in via_mode_filter()
363 		if (strcmp(model_num, "TS64GSSD25-M") == 0) {  in via_mode_filter()
365 	"disabling UDMA mode due to reported lockups with this device\n");  in via_mode_filter()
370 	if (dev->class == ATA_DEV_ATAPI &&  in via_mode_filter()
380  *	via_tf_load - send taskfile registers to host controller
392 	struct ata_ioports *ioaddr = &ap->ioaddr;  in via_tf_load()
393 	struct via_port *vp = ap->private_data;  in via_tf_load()
394 	unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;  in via_tf_load()
397 	if (tf->ctl != ap->last_ctl) {  in via_tf_load()
398 		iowrite8(tf->ctl, ioaddr->ctl_addr);  in via_tf_load()
399 		ap->last_ctl = tf->ctl;  in via_tf_load()
404 	if (tf->flags & ATA_TFLAG_DEVICE) {  in via_tf_load()
405 		iowrite8(tf->device, ioaddr->device_addr);  in via_tf_load()
406 		vp->cached_device = tf->device;  in via_tf_load()
408 		iowrite8(vp->cached_device, ioaddr->device_addr);  in via_tf_load()
410 	if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {  in via_tf_load()
411 		WARN_ON_ONCE(!ioaddr->ctl_addr);  in via_tf_load()
412 		iowrite8(tf->hob_feature, ioaddr->feature_addr);  in via_tf_load()
413 		iowrite8(tf->hob_nsect, ioaddr->nsect_addr);  in via_tf_load()
414 		iowrite8(tf->hob_lbal, ioaddr->lbal_addr);  in via_tf_load()
415 		iowrite8(tf->hob_lbam, ioaddr->lbam_addr);  in via_tf_load()
416 		iowrite8(tf->hob_lbah, ioaddr->lbah_addr);  in via_tf_load()
420 		iowrite8(tf->feature, ioaddr->feature_addr);  in via_tf_load()
421 		iowrite8(tf->nsect, ioaddr->nsect_addr);  in via_tf_load()
422 		iowrite8(tf->lbal, ioaddr->lbal_addr);  in via_tf_load()
423 		iowrite8(tf->lbam, ioaddr->lbam_addr);  in via_tf_load()
424 		iowrite8(tf->lbah, ioaddr->lbah_addr);  in via_tf_load()
433 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in via_port_start()
439 	vp = devm_kzalloc(&pdev->dev, sizeof(struct via_port), GFP_KERNEL);  in via_port_start()
441 		return -ENOMEM;  in via_port_start()
442 	ap->private_data = vp;  in via_port_start()
467  *	via_config_fifo		-	set up the FIFO
505 	via_config_fifo(pdev, config->flags);  in via_fixup()
507 	if (config->udma_mask == ATA_UDMA4) {  in via_fixup()
513 	if (config->flags & VIA_BAD_CLK66) {  in via_fixup()
522  *	via_init_one		-	discovery callback
532 	/* Early VIA without UDMA support */  in via_init_one()
546 	/* VIA UDMA 33 devices (and borked 66) */  in via_init_one()
554 	/* VIA UDMA 66 devices */  in via_init_one()
562 	/* VIA UDMA 100 devices */  in via_init_one()
582 	unsigned long flags = id->driver_data;  in via_init_one()
585 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in via_init_one()
596 	for (config = via_isa_bridges; config->id != PCI_DEVICE_ID_VIA_ANON;  in via_init_one()
599 			!!(config->flags & VIA_BAD_ID),  in via_init_one()
600 			config->id, NULL))) {  in via_init_one()
601 			u8 rev = isa->revision;  in via_init_one()
604 			if ((id->device == 0x0415 || id->device == 0x3164) &&  in via_init_one()
605 			    (config->id != id->device))  in via_init_one()
608 			if (rev >= config->rev_min && rev <= config->rev_max)  in via_init_one()
612 	if (!(config->flags & VIA_NO_ENABLES)) {  in via_init_one()
617 			return -ENODEV;  in via_init_one()
621 	switch (config->udma_mask) {  in via_init_one()
623 		if (config->flags & VIA_NO_UNMASK)  in via_init_one()
642 		return -ENODEV;  in via_init_one()
653  *	via_reinit_one		-	reinit after resume
671 	via_fixup(pdev, host->private_data);  in via_reinit_one()
705 MODULE_DESCRIPTION("low-level driver for VIA PATA");