1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_serverworks.c 	- Serverworks PATA for new ATA layer
11  * Copyright (C) 1998-2000 Michel Aubry
12  * Copyright (C) 1998-2000 Andrzej Krzysztofowicz
13  * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
20  *         supports UDMA mode 2 (33 MB/s)
23  *         all revisions support UDMA mode 4 (66 MB/s)
24  *         revision A2.0 and up support UDMA mode 5 (100 MB/s)
27  *         *** to detect 80-conductor cable presence. ***
50  * Seagate Barracuda ATA IV Family drives in UDMA mode 5
62  *	oem_cable	-	Dell/Sun serverworks cable detection
71 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in oem_cable()
73 	if (pdev->subsystem_device & (1 << (ap->port_no + 14)))  in oem_cable()
97  *	serverworks_cable_detect	-	cable detection
106 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in serverworks_cable_detect()
109 	while(cb->device) {  in serverworks_cable_detect()
110 		if (cb->device == pdev->device &&  in serverworks_cable_detect()
111 		    (cb->subvendor == pdev->subsystem_vendor ||  in serverworks_cable_detect()
112 		      cb->subvendor == PCI_ANY_ID)) {  in serverworks_cable_detect()
113 			return cb->cable_detect(ap);  in serverworks_cable_detect()
119 	return -1;	/* kill compiler warning */  in serverworks_cable_detect()
123  *	serverworks_is_csb	-	Check for CSB or OSB
132 	switch (pdev->device) {  in serverworks_is_csb()
145  *	serverworks_osb4_filter	-	mode selection filter
150  *	specific rules. OSB4 requires no UDMA for disks due to a FIFO
156 	if (adev->class == ATA_DEV_ATA)  in serverworks_osb4_filter()
163  *	serverworks_csb_filter	-	mode selection filter
173 	const char *p;  in serverworks_csb_filter()  local
177 	/* Disk, UDMA */  in serverworks_csb_filter()
178 	if (adev->class != ATA_DEV_ATA)  in serverworks_csb_filter()
182 	ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));  in serverworks_csb_filter()
184 	for (i = 0; (p = csb_bad_ata100[i]) != NULL; i++) {  in serverworks_csb_filter()
185 		if (!strcmp(p, model_num))  in serverworks_csb_filter()
192  *	serverworks_set_piomode	-	set initial PIO mode data
202 	int offset = 1 + 2 * ap->port_no - adev->devno;  in serverworks_set_piomode()
203 	int devbits = (2 * ap->port_no + adev->devno) * 4;  in serverworks_set_piomode()
205 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in serverworks_set_piomode()
206 	int pio = adev->pio_mode - XFER_PIO_0;  in serverworks_set_piomode()
220  *	serverworks_set_dmamode	-	set initial DMA mode data
224  *	Program the MWDMA/UDMA modes for the serverworks OSB4/CSB5
226  *	while the chipset uses mode number for UDMA.
232 	int offset = 1 + 2 * ap->port_no - adev->devno;  in serverworks_set_dmamode()
233 	int devbits = 2 * ap->port_no + adev->devno;  in serverworks_set_dmamode()
236 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in serverworks_set_dmamode()
239 	pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);  in serverworks_set_dmamode()
240 	ultra &= ~(0x0F << (adev->devno * 4));  in serverworks_set_dmamode()
242 	if (adev->dma_mode >= XFER_UDMA_0) {  in serverworks_set_dmamode()
245 		ultra |= (adev->dma_mode - XFER_UDMA_0)  in serverworks_set_dmamode()
246 					<< (adev->devno * 4);  in serverworks_set_dmamode()
250 			dma_mode[adev->dma_mode - XFER_MW_DMA_0]);  in serverworks_set_dmamode()
253 	pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);  in serverworks_set_dmamode()
291 			dev_info(&pdev->dev, "UDMA not BIOS enabled.\n");  in serverworks_fixup_osb4()
292 		reg |=  0x00004000; /* enable UDMA/33 support */  in serverworks_fixup_osb4()
297 	dev_warn(&pdev->dev, "Unable to find bridge.\n");  in serverworks_fixup_osb4()
298 	return -ENODEV;  in serverworks_fixup_osb4()
306 	if (!(PCI_FUNC(pdev->devfn) & 1)) {  in serverworks_fixup_csb()
332 	/* setup the UDMA Control register  in serverworks_fixup_csb()
335 	 * 2. enable DMA modes with bits 0-1  in serverworks_fixup_csb()
343 	if (!(PCI_FUNC(pdev->devfn) & 1))  in serverworks_fixup_csb()
346 		btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;  in serverworks_fixup_csb()
355 	/* Setup HT1000 SouthBridge Controller - Single Channel Only */  in serverworks_fixup_ht1000()
369 	switch (pdev->device) {  in serverworks_fixup()
397 		}, { /* OSB4 no UDMA */  in serverworks_init_one()
401 			/* No UDMA */  in serverworks_init_one()
409 		}, { /* CSB5 - later revisions*/  in serverworks_init_one()
417 	const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };  in serverworks_init_one()
428 	if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {  in serverworks_init_one()
429 		/* Select non UDMA capable OSB4 if we can't do fixups */  in serverworks_init_one()
435 	else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||  in serverworks_init_one()
436 		 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||  in serverworks_init_one()
437 		 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {  in serverworks_init_one()
445 		if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)  in serverworks_init_one()
493 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");