1 // SPDX-License-Identifier: GPL-2.0-only
26 	unsigned long mask[2];  member
30  *	pacpi_pre_reset	-	check for 40/80 pin
39 	struct ata_port *ap = link->ap;  in pacpi_pre_reset()
40 	struct pata_acpi *acpi = ap->private_data;  in pacpi_pre_reset()
41 	if (ACPI_HANDLE(&ap->tdev) == NULL || ata_acpi_gtm(ap, &acpi->gtm) < 0)  in pacpi_pre_reset()
42 		return -ENODEV;  in pacpi_pre_reset()
48  *	pacpi_cable_detect	-	cable type detection
56 	struct pata_acpi *acpi = ap->private_data;  in pacpi_cable_detect()
58 	if ((acpi->mask[0] | acpi->mask[1]) & (0xF8 << ATA_SHIFT_UDMA))  in pacpi_cable_detect()
65  *	pacpi_discover_modes	-	filter non ACPI modes
70  *	set up sensibly. From this we get a mask of ACPI modes we can use
75 	struct pata_acpi *acpi = ap->private_data;  in pacpi_discover_modes()
79 	probe = acpi->gtm;  in pacpi_discover_modes()
86 		ap->cbl = ATA_CBL_PATA80;  in pacpi_discover_modes()
92  *	pacpi_mode_filter	-	mode filter for ACPI
94  *	@mask: mask of valid modes
96  *	Filter the valid mode list according to our own specific rules, in
97  *	this case the list of discovered valid modes obtained by ACPI probing
100 static unsigned int pacpi_mode_filter(struct ata_device *adev, unsigned int mask)  in pacpi_mode_filter()  argument
102 	struct pata_acpi *acpi = adev->link->ap->private_data;  in pacpi_mode_filter()
103 	return mask & acpi->mask[adev->devno];  in pacpi_mode_filter()
107  *	pacpi_set_piomode	-	set initial PIO mode data
114 	int unit = adev->devno;  in pacpi_set_piomode()
115 	struct pata_acpi *acpi = ap->private_data;  in pacpi_set_piomode()
118 	if (!(acpi->gtm.flags & 0x10))  in pacpi_set_piomode()
122 	t = ata_timing_find_mode(adev->pio_mode);  in pacpi_set_piomode()
123 	acpi->gtm.drive[unit].pio = t->cycle;  in pacpi_set_piomode()
124 	ata_acpi_stm(ap, &acpi->gtm);  in pacpi_set_piomode()
126 	ata_acpi_gtm(ap, &acpi->gtm);  in pacpi_set_piomode()
130  *	pacpi_set_dmamode	-	set initial DMA mode data
137 	int unit = adev->devno;  in pacpi_set_dmamode()
138 	struct pata_acpi *acpi = ap->private_data;  in pacpi_set_dmamode()
141 	if (!(acpi->gtm.flags & 0x10))  in pacpi_set_dmamode()
145 	t = ata_timing_find_mode(adev->dma_mode);  in pacpi_set_dmamode()
146 	if (adev->dma_mode >= XFER_UDMA_0) {  in pacpi_set_dmamode()
147 		acpi->gtm.drive[unit].dma = t->udma;  in pacpi_set_dmamode()
148 		acpi->gtm.flags |= (1 << (2 * unit));  in pacpi_set_dmamode()
150 		acpi->gtm.drive[unit].dma = t->cycle;  in pacpi_set_dmamode()
151 		acpi->gtm.flags &= ~(1 << (2 * unit));  in pacpi_set_dmamode()
153 	ata_acpi_stm(ap, &acpi->gtm);  in pacpi_set_dmamode()
155 	ata_acpi_gtm(ap, &acpi->gtm);  in pacpi_set_dmamode()
159  *	pacpi_qc_issue	-	command issue
169 	struct ata_port *ap = qc->ap;  in pacpi_qc_issue()
170 	struct ata_device *adev = qc->dev;  in pacpi_qc_issue()
171 	struct pata_acpi *acpi = ap->private_data;  in pacpi_qc_issue()
173 	if (acpi->gtm.flags & 0x10)  in pacpi_qc_issue()
176 	if (adev != acpi->last) {  in pacpi_qc_issue()
180 		acpi->last = adev;  in pacpi_qc_issue()
186  *	pacpi_port_start	-	port setup
194 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in pacpi_port_start()
197 	if (ACPI_HANDLE(&ap->tdev) == NULL)  in pacpi_port_start()
198 		return -ENODEV;  in pacpi_port_start()
200 	acpi = ap->private_data = devm_kzalloc(&pdev->dev, sizeof(struct pata_acpi), GFP_KERNEL);  in pacpi_port_start()
201 	if (ap->private_data == NULL)  in pacpi_port_start()
202 		return -ENOMEM;  in pacpi_port_start()
203 	acpi->mask[0] = pacpi_discover_modes(ap, &ap->link.device[0]);  in pacpi_port_start()
204 	acpi->mask[1] = pacpi_discover_modes(ap, &ap->link.device[1]);  in pacpi_port_start()
225  *	pacpi_init_one - Register ACPI ATA PCI device with kernel services
235  *	Zero on success, or -ERRNO value.
250 	if (pdev->vendor == PCI_VENDOR_ID_ATI) {  in pacpi_init_one()
278 MODULE_DESCRIPTION("SCSI low-level driver for ATA in ACPI mode");