1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_sl82c105.c 	- SL82C105 PATA for new ATA layer
14  * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back
45  *	sl82c105_pre_reset		-	probe begin
58 	struct ata_port *ap = link->ap;  in sl82c105_pre_reset()
59 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in sl82c105_pre_reset()
61 	if (ap->port_no && !pci_test_config_bits(pdev, &sl82c105_enable_bits[ap->port_no]))  in sl82c105_pre_reset()
62 		return -ENOENT;  in sl82c105_pre_reset()
68  *	sl82c105_configure_piomode	-	set chip PIO timing
80 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in sl82c105_configure_piomode()
85 	int timing = 0x44 + (8 * ap->port_no) + (4 * adev->devno);  in sl82c105_configure_piomode()
93  *	sl82c105_set_piomode	-	set initial PIO mode data
103 	sl82c105_configure_piomode(ap, adev, adev->pio_mode - XFER_PIO_0);  in sl82c105_set_piomode()
107  *	sl82c105_configure_dmamode	-	set DMA mode in chip
111  *	Load DMA cycle times into the chip ready for a DMA transfer
117 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in sl82c105_configure_dmamode()
122 	int timing = 0x44 + (8 * ap->port_no) + (4 * adev->devno);  in sl82c105_configure_dmamode()
123 	int dma = adev->dma_mode - XFER_MW_DMA_0;  in sl82c105_configure_dmamode()
131  *	sl82c105_reset_engine	-	Reset the DMA engine
136  *	recommended fix is to reset the engine each use using a chip
142 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in sl82c105_reset_engine()
151  *	sl82c105_bmdma_start		-	DMA engine begin
163 	struct ata_port *ap = qc->ap;  in sl82c105_bmdma_start()
170 	sl82c105_configure_dmamode(ap, qc->dev);  in sl82c105_bmdma_start()
176  *	sl82c105_bmdma_stop		-	DMA engine stop
191 	struct ata_port *ap = qc->ap;  in sl82c105_bmdma_stop()
199 	sl82c105_set_piomode(ap, qc->dev);  in sl82c105_bmdma_stop()
203  *	sl82c105_qc_defer	-	implement serialization
214 	struct ata_host *host = qc->ap->host;  in sl82c105_qc_defer()
215 	struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];  in sl82c105_qc_defer()
225 	if (alt && alt->qc_active)  in sl82c105_qc_defer()
232 	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);  in sl82c105_sff_irq_check()
233 	u32 val, mask		= ap->port_no ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;  in sl82c105_sff_irq_check()
256  *	sl82c105_bridge_revision	-	find bridge version
261  *	find a revision or the right device it returns -1
271 	bridge = pci_get_slot(pdev->bus,  in sl82c105_bridge_revision()
272 			       PCI_DEVFN(PCI_SLOT(pdev->devfn), 0));  in sl82c105_bridge_revision()
274 		return -1;  in sl82c105_bridge_revision()
279 	if (bridge->vendor != PCI_VENDOR_ID_WINBOND ||  in sl82c105_bridge_revision()
280 	    bridge->device != PCI_DEVICE_ID_WINBOND_83C553 ||  in sl82c105_bridge_revision()
281 	    bridge->class >> 8 != PCI_CLASS_BRIDGE_ISA) {  in sl82c105_bridge_revision()
283 		return -1;  in sl82c105_bridge_revision()
289 	return bridge->revision;  in sl82c105_bridge_revision()
326 	if (rev == -1)  in sl82c105_init_one()
327 		dev_warn(&dev->dev,  in sl82c105_init_one()
330 		dev_warn(&dev->dev,  in sl82c105_init_one()
377 MODULE_DESCRIPTION("low-level driver for Sl82c105");