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>
27  *         *** to detect 80-conductor cable presence. ***
61  *	oem_cable	-	Dell/Sun serverworks cable detection
70 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in oem_cable()
72 	if (pdev->subsystem_device & (1 << (ap->port_no + 14)))  in oem_cable()
96  *	serverworks_cable_detect	-	cable detection
105 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in serverworks_cable_detect()
108 	while(cb->device) {  in serverworks_cable_detect()
109 		if (cb->device == pdev->device &&  in serverworks_cable_detect()
110 		    (cb->subvendor == pdev->subsystem_vendor ||  in serverworks_cable_detect()
111 		      cb->subvendor == PCI_ANY_ID)) {  in serverworks_cable_detect()
112 			return cb->cable_detect(ap);  in serverworks_cable_detect()
118 	return -1;	/* kill compiler warning */  in serverworks_cable_detect()
122  *	serverworks_is_csb	-	Check for CSB or OSB
131 	switch (pdev->device) {  in serverworks_is_csb()
144  *	serverworks_osb4_filter	-	mode selection filter
155 	if (adev->class == ATA_DEV_ATA)  in serverworks_osb4_filter()
162  *	serverworks_csb_filter	-	mode selection filter
176 	if (adev->class != ATA_DEV_ATA)  in serverworks_csb_filter()
180 	ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));  in serverworks_csb_filter()
190  *	serverworks_set_piomode	-	set initial PIO mode data
200 	int offset = 1 + 2 * ap->port_no - adev->devno;  in serverworks_set_piomode()
201 	int devbits = (2 * ap->port_no + adev->devno) * 4;  in serverworks_set_piomode()
203 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in serverworks_set_piomode()
204 	int pio = adev->pio_mode - XFER_PIO_0;  in serverworks_set_piomode()
218  *	serverworks_set_dmamode	-	set initial DMA mode data
230 	int offset = 1 + 2 * ap->port_no - adev->devno;  in serverworks_set_dmamode()
231 	int devbits = 2 * ap->port_no + adev->devno;  in serverworks_set_dmamode()
232 	u8 ultra;  in serverworks_set_dmamode()  local
234 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in serverworks_set_dmamode()
237 	pci_read_config_byte(pdev, 0x56 + ap->port_no, &ultra);  in serverworks_set_dmamode()
238 	ultra &= ~(0x0F << (adev->devno * 4));  in serverworks_set_dmamode()
240 	if (adev->dma_mode >= XFER_UDMA_0) {  in serverworks_set_dmamode()
243 		ultra |= (adev->dma_mode - XFER_UDMA_0)  in serverworks_set_dmamode()
244 					<< (adev->devno * 4);  in serverworks_set_dmamode()
248 			dma_mode[adev->dma_mode - XFER_MW_DMA_0]);  in serverworks_set_dmamode()
251 	pci_write_config_byte(pdev, 0x56 + ap->port_no, ultra);  in serverworks_set_dmamode()
289 			dev_info(&pdev->dev, "UDMA not BIOS enabled.\n");  in serverworks_fixup_osb4()
295 	dev_warn(&pdev->dev, "Unable to find bridge.\n");  in serverworks_fixup_osb4()
296 	return -ENODEV;  in serverworks_fixup_osb4()
304 	if (!(PCI_FUNC(pdev->devfn) & 1)) {  in serverworks_fixup_csb()
333 	 * 2. enable DMA modes with bits 0-1  in serverworks_fixup_csb()
341 	if (!(PCI_FUNC(pdev->devfn) & 1))  in serverworks_fixup_csb()
344 		btr |= (pdev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;  in serverworks_fixup_csb()
353 	/* Setup HT1000 SouthBridge Controller - Single Channel Only */  in serverworks_fixup_ht1000()
367 	switch (pdev->device) {  in serverworks_fixup()
407 		}, { /* CSB5 - later revisions*/  in serverworks_init_one()
415 	const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };  in serverworks_init_one()
426 	if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {  in serverworks_init_one()
433 	else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||  in serverworks_init_one()
434 		 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE) ||  in serverworks_init_one()
435 		 (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)) {  in serverworks_init_one()
443 		if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)  in serverworks_init_one()
491 MODULE_DESCRIPTION("low-level driver for Serverworks OSB4/CSB5/CSB6");