drivers/ata/pata_cypress.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_cypress.c 	- Cypress PATA for new ATA layer
49  *	cy82c693_set_piomode	-	set initial PIO mode data
53  *	Called to do the PIO mode setup.
58 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cy82c693_set_piomode()
64 	if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {  in cy82c693_set_piomode()
69 	time_16 = clamp_val(t.recover - 1, 0, 15) |  in cy82c693_set_piomode()
70 		  (clamp_val(t.active - 1, 0, 15) << 4);  in cy82c693_set_piomode()
71 	time_8 = clamp_val(t.act8b - 1, 0, 15) |  in cy82c693_set_piomode()
72 		 (clamp_val(t.rec8b - 1, 0, 15) << 4);  in cy82c693_set_piomode()
74 	if (adev->devno == 0) {  in cy82c693_set_piomode()
78 		addr |= clamp_val(t.setup - 1, 0, 15);  in cy82c693_set_piomode()
88 		addr |= (clamp_val(t.setup - 1, 0, 15) << 4);  in cy82c693_set_piomode()
98  *	cy82c693_set_dmamode	-	set initial DMA mode data
102  *	Called to do the DMA mode setup.
107 	int reg = CY82_INDEX_CHANNEL0 + ap->port_no;  in cy82c693_set_dmamode()
111 	outb(adev->dma_mode - XFER_MW_DMA_0, 0x23);  in cy82c693_set_dmamode()
113 	/* 0x50 gives the best behaviour on the Alpha's using this chip */  in cy82c693_set_dmamode()
144 	if (PCI_FUNC(pdev->devfn) != 1)  in cy82c693_init_one()
145 		return -ENODEV;  in cy82c693_init_one()
170 MODULE_DESCRIPTION("low-level driver for the CY82C693 PATA controller");