1 // SPDX-License-Identifier: GPL-2.0-only
3  *    pata_oldpiix.c - Intel PATA/SATA controllers
10  *    SITRE and the slave timing registers. This means that you have to
11  *    set timing per channel, or be clever. Libata tells us whenever it
31  *	oldpiix_pre_reset		-	probe begin
40 	struct ata_port *ap = link->ap;  in oldpiix_pre_reset()
41 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in oldpiix_pre_reset()
47 	if (!pci_test_config_bits(pdev, &oldpiix_enable_bits[ap->port_no]))  in oldpiix_pre_reset()
48 		return -ENOENT;  in oldpiix_pre_reset()
54  *	oldpiix_set_piomode - Initialize host controller PATA PIO timings
58  *	Set PIO mode for device, in host controller PCI config space.
66 	unsigned int pio	= adev->pio_mode - XFER_PIO_0;  in oldpiix_set_piomode()
67 	struct pci_dev *dev	= to_pci_dev(ap->host->dev);  in oldpiix_set_piomode()
68 	unsigned int idetm_port= ap->port_no ? 0x42 : 0x40;  in oldpiix_set_piomode()
73 	 *	See Intel Document 298600-004 for the timing programming rules  in oldpiix_set_piomode()
75 	 *	timing port at 0x44.  in oldpiix_set_piomode()
91 	if (adev->class == ATA_DEV_ATA)  in oldpiix_set_piomode()
98 	 * Clear the other drive's timing bits.  in oldpiix_set_piomode()
100 	if (adev->devno == 0) {  in oldpiix_set_piomode()
112 	ap->private_data = adev;  in oldpiix_set_piomode()
116  *	oldpiix_set_dmamode - Initialize host controller PATA DMA timings
120  *	Set MWDMA mode for device, in host controller PCI config space.
128 	struct pci_dev *dev	= to_pci_dev(ap->host->dev);  in oldpiix_set_dmamode()
129 	u8 idetm_port		= ap->port_no ? 0x42 : 0x40;  in oldpiix_set_dmamode()
142 	 * been set when the PIO timing was set.  in oldpiix_set_dmamode()
145 	unsigned int mwdma	= adev->dma_mode - XFER_MW_DMA_0;  in oldpiix_set_dmamode()
150 	int pio = needed_pio[mwdma] - XFER_PIO_0;  in oldpiix_set_dmamode()
156 	if (adev->class == ATA_DEV_ATA)  in oldpiix_set_dmamode()
162 	if (adev->pio_mode < needed_pio[mwdma])  in oldpiix_set_dmamode()
163 		/* Enable DMA timing only */  in oldpiix_set_dmamode()
166 	/* Mask out the relevant control and timing bits we will load. Also  in oldpiix_set_dmamode()
168 	if (adev->devno == 0) {  in oldpiix_set_dmamode()
179 	ap->private_data = adev;  in oldpiix_set_dmamode()
183  *	oldpiix_qc_issue	-	command issue
195 	struct ata_port *ap = qc->ap;  in oldpiix_qc_issue()
196 	struct ata_device *adev = qc->dev;  in oldpiix_qc_issue()
198 	if (adev != ap->private_data) {  in oldpiix_qc_issue()
222  *	oldpiix_init_one - Register PIIX ATA PCI device with kernel services
233  *	Zero on success, or -ERRNO value.
246 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in oldpiix_init_one()
271 MODULE_DESCRIPTION("SCSI low-level driver for early PIIX series controllers");