drivers/ata/pata_ns87410.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * pata_ns87410.c 	- National Semiconductor 87410 PATA for new ATA layer
19  *	ns87410_pre_reset		-	probe begin
28 	struct ata_port *ap = link->ap;  in ns87410_pre_reset()
29 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in ns87410_pre_reset()
35 	if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))  in ns87410_pre_reset()
36 		return -ENOENT;  in ns87410_pre_reset()
42  *	ns87410_set_piomode	-	set initial PIO mode data
52 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in ns87410_set_piomode()
53 	int port = 0x40 + 4 * ap->port_no;  in ns87410_set_piomode()
74 	if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {  in ns87410_set_piomode()
75 		dev_err(&pdev->dev, "unknown mode %d\n", adev->pio_mode);  in ns87410_set_piomode()
79 	at.active = clamp_val(at.active, 2, 16) - 2;  in ns87410_set_piomode()
80 	at.setup = clamp_val(at.setup, 1, 4) - 1;  in ns87410_set_piomode()
81 	at.recover = clamp_val(at.recover, 1, 12) - 1;  in ns87410_set_piomode()
83 	idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];  in ns87410_set_piomode()
87 	/* We use ap->private_data as a pointer to the device currently  in ns87410_set_piomode()
89 	ap->private_data = adev;  in ns87410_set_piomode()
93  *	ns87410_qc_issue	-	command issue
103 	struct ata_port *ap = qc->ap;  in ns87410_qc_issue()
104 	struct ata_device *adev = qc->dev;  in ns87410_qc_issue()
108 	   does not set adev->pio_mode to XFER_PIO_0 while probing as would be  in ns87410_qc_issue()
111 	if (adev->pio_mode && adev != ap->private_data)  in ns87410_qc_issue()
160 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");