1 // SPDX-License-Identifier: GPL-2.0-only
9  * Copyright (c) 2000-2002 Vojtech Pavlik
10  * Copyright (c) 2007-2010 Bartlomiej Zolnierkiewicz
113  *	via_set_speed			-	write timing registers
123 	struct pci_dev *dev = to_pci_dev(hwif->dev);  in via_set_speed()
125 	struct via82cxxx_dev *vdev = host->host_priv;  in via_set_speed()
128 	if (~vdev->via_config->flags & VIA_BAD_AST) {  in via_set_speed()
130 		t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));  in via_set_speed()
134 	pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),  in via_set_speed()
135 		((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));  in via_set_speed()
137 	pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),  in via_set_speed()
138 		((clamp_val(timing->active, 1, 16) - 1) << 4) | (clamp_val(timing->recover, 1, 16) - 1));  in via_set_speed()
140 	switch (vdev->via_config->udma_mask) {  in via_set_speed()
141 	case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;  in via_set_speed()
142 	case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;  in via_set_speed()
143 	case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;  in via_set_speed()
144 	case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;  in via_set_speed()
147 	/* Set UDMA unless device is not UDMA capable */  in via_set_speed()
148 	if (vdev->via_config->udma_mask) {  in via_set_speed()
151 		pci_read_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, &udma_etc);  in via_set_speed()
156 		if (timing->udma) {  in via_set_speed()
157 			/* preserve 80-wire cable detection bit */  in via_set_speed()
162 		pci_write_config_byte(dev, VIA_UDMA_TIMING + 3 - dn, udma_etc);  in via_set_speed()
167  *	via_set_drive		-	configure transfer mode
178 	struct ide_host *host = dev_get_drvdata(hwif->dev);  in via_set_drive()
179 	struct via82cxxx_dev *vdev = host->host_priv;  in via_set_drive()
182 	const u8 speed = drive->dma_mode;  in via_set_drive()
186 	switch (vdev->via_config->udma_mask) {  in via_set_drive()
197 		ide_timing_compute(peer, peer->pio_mode, &p, T, UT);  in via_set_drive()
201 	via_set_speed(hwif, drive->dn, &t);  in via_set_drive()
205  *	via_set_pio_mode	-	set host controller for PIO mode
209  *	A callback from the upper layers for PIO-only tuning.
214 	drive->dma_mode = drive->pio_mode;  in via_set_pio_mode()
223 	     via_config->id != PCI_DEVICE_ID_VIA_ANON; via_config++)  in via_config_find()
225 			!!(via_config->flags & VIA_BAD_ID),  in via_config_find()
226 			via_config->id, NULL))) {  in via_config_find()
228 			if ((*isa)->revision >= via_config->rev_min &&  in via_config_find()
229 			    (*isa)->revision <= via_config->rev_max)  in via_config_find()
238  * Check and handle 80-wire cable presence
244 	switch (vdev->via_config->udma_mask) {  in via_cable_detect()
246 			for (i = 24; i >= 0; i -= 8)  in via_cable_detect()
252 					 * UDMA w/ < 3T/cycle  in via_cable_detect()
254 					vdev->via_80w |= (1 << (1 - (i >> 4)));  in via_cable_detect()
259 			for (i = 24; i >= 0; i -= 8)  in via_cable_detect()
263 					/* BIOS 80-wire bit or  in via_cable_detect()
264 					 * UDMA w/ < 60ns/cycle  in via_cable_detect()
266 					vdev->via_80w |= (1 << (1 - (i >> 4)));  in via_cable_detect()
271 			for (i = 24; i >= 0; i -= 8)  in via_cable_detect()
275 					/* BIOS 80-wire bit or  in via_cable_detect()
276 					 * UDMA w/ < 60ns/cycle  in via_cable_detect()
278 					vdev->via_80w |= (1 << (1 - (i >> 4)));  in via_cable_detect()
285  *	init_chipset_via82cxxx	-	initialization handler
295 	struct via82cxxx_dev *vdev = host->host_priv;  in init_chipset_via82cxxx()
296 	struct via_isa_bridge *via_config = vdev->via_config;  in init_chipset_via82cxxx()
307 	if (via_config->udma_mask == ATA_UDMA4) {  in init_chipset_via82cxxx()
310 	} else if (via_config->flags & VIA_BAD_CLK66) {  in init_chipset_via82cxxx()
328 	if (via_config->flags & VIA_BAD_PREQ) {  in init_chipset_via82cxxx()
334 	if (via_config->flags & VIA_SET_FIFO) {  in init_chipset_via82cxxx()
369 	/* Arima W730-K8/Targa Visionary 811/... */  in via_cable_override()
370 	if (pdev->subsystem_vendor == 0x161F &&  in via_cable_override()
371 	    pdev->subsystem_device == 0x2032)  in via_cable_override()
379 	struct pci_dev *pdev = to_pci_dev(hwif->dev);  in via82cxxx_cable_detect()
381 	struct via82cxxx_dev *vdev = host->host_priv;  in via82cxxx_cable_detect()
386 	if ((vdev->via_config->flags & VIA_SATA_PATA) && hwif->channel == 0)  in via82cxxx_cable_detect()
389 	if ((vdev->via_80w >> hwif->channel) & 1)  in via82cxxx_cable_detect()
420 	u8 idx = id->driver_data;  in via_init_one()
434 		pci_name(dev), via_config->name, isa->revision,  in via_init_one()
435 		via_config->udma_mask ? "U" : "MW",  in via_init_one()
436 		via_dma[via_config->udma_mask ?  in via_init_one()
437 			(fls(via_config->udma_mask) - 1) : 0]);  in via_init_one()
466 	if ((via_config->flags & VIA_NO_UNMASK) == 0)  in via_init_one()
469 	d.udma_mask = via_config->udma_mask;  in via_init_one()
475 		return -ENOMEM;  in via_init_one()
478 	vdev->via_config = via_config;  in via_init_one()
490 	struct via82cxxx_dev *vdev = host->host_priv;  in via_remove()