drivers/ata/pata_sc1200.c

1 // SPDX-License-Identifier: GPL-2.0-only
6  * TODO: Needs custom DMA cleanup code
10  * linux/drivers/ide/pci/sc1200.c		Version 0.91	28-Jan-2003
12  * Copyright (C) 2000-2002		Mark Lord <mlord@pobox.com>
37  *	sc1200_clock	-	PCI clock
40  *	in use. We return 0 for 33MHz 1 for 48MHz and 2 for 66Mhz
51 		return 0;	/* 33 MHz mode */  in sc1200_clock()
54 	   0/3 is 33Mhz 1 is 48 2 is 66 */  in sc1200_clock()
65  *	sc1200_set_piomode		-	PIO setup
75 		/* format0, 33Mhz */  in sc1200_set_piomode()
77 		/* format1, 33Mhz */  in sc1200_set_piomode()
85 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in sc1200_set_piomode()
87 	unsigned int reg = 0x40 + 0x10 * ap->port_no;  in sc1200_set_piomode()
88 	int mode = adev->pio_mode - XFER_PIO_0;  in sc1200_set_piomode()
93 	pci_write_config_dword(pdev, reg + 8 * adev->devno,  in sc1200_set_piomode()
98  *	sc1200_set_dmamode		-	DMA timing setup
121 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in sc1200_set_dmamode()
122 	unsigned int reg = 0x40 + 0x10 * ap->port_no;  in sc1200_set_dmamode()
123 	int mode = adev->dma_mode;  in sc1200_set_dmamode()
127 		format = udma_timing[clock][mode - XFER_UDMA_0];  in sc1200_set_dmamode()
129 		format = mwdma_timing[clock][mode - XFER_MW_DMA_0];  in sc1200_set_dmamode()
131 	if (adev->devno == 0) {  in sc1200_set_dmamode()
143  *	sc1200_qc_issue		-	command issue
154 	struct ata_port *ap = qc->ap;  in sc1200_qc_issue()
155 	struct ata_device *adev = qc->dev;  in sc1200_qc_issue()
156 	struct ata_device *prev = ap->private_data;  in sc1200_qc_issue()
158 	/* See if the DMA settings could be wrong */  in sc1200_qc_issue()
163 		    	/* Switch the mode bits */  in sc1200_qc_issue()
171  *	sc1200_qc_defer	-	implement serialization
179 	struct ata_host *host = qc->ap->host;  in sc1200_qc_defer()
180 	struct ata_port *alt = host->ports[1 ^ qc->ap->port_no];  in sc1200_qc_defer()
190 	if (alt && alt->qc_active)  in sc1200_qc_defer()
212  *	sc1200_init_one		-	Initialise an SC1200
254 MODULE_DESCRIPTION("low-level driver for the NS/AMD SC1200");