drivers/ata/pata_cmd64x.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_cmd64x.c 	- CMD64x PATA for new ATA layer
6  *			  (C) 2009-2010 Bartlomiej Zolnierkiewicz
21  * Copyright (C) 1999-2002	Andre Hedrick <andre@linux-ide.org>
75 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
80 	if (r & (1 << ap->port_no))
86  *	cmd64x_set_timing	-	set PIO and MWDMA timing
96 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
113 	int arttim = arttim_port[ap->port_no][adev->devno];
114 	int drwtim = drwtim_port[ap->port_no][adev->devno];
122 	if (ap->port_no) {
128 			ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);
136 		t.active += t.recover - 16;
148 		t.recover--;
170  *	cmd64x_set_piomode	-	set initial PIO mode data
180 	cmd64x_set_timing(ap, adev, adev->pio_mode);
184  *	cmd64x_set_dmamode	-	set initial DMA mode data
197 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
200 	int pciU = UDIDETCR0 + 8 * ap->port_no;
201 	int pciD = BMIDESR0 + 8 * ap->port_no;
202 	int shift = 2 * adev->devno;
208 	regD &= ~(0x20 << adev->devno);
212 	regU &= ~(0x05 << adev->devno);
214 	if (adev->dma_mode >= XFER_UDMA_0) {
216 		regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
218 		regU |= 1 << adev->devno; /* UDMA on */
219 		if (adev->dma_mode > XFER_UDMA_2) /* 15nS timing */
220 			regU |= 4 << adev->devno;
222 		regU &= ~ (1 << adev->devno);	/* UDMA off */
223 		cmd64x_set_timing(ap, adev, adev->dma_mode);
226 	regD |= 0x20 << adev->devno;
233  *	cmd64x_sff_irq_check	-	check IDE interrupt
241 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
242 	int irq_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
243 	int irq_reg  = ap->port_no ? ARTTIM23 : CFR;
253  *	cmd64x_sff_irq_clear	-	clear IDE interrupt
261 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
262 	int irq_reg = ap->port_no ? ARTTIM23 : CFR;
272  *	cmd648_sff_irq_check	-	check IDE interrupt
280 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
282 	int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
289  *	cmd648_sff_irq_clear	-	clear IDE interrupt
297 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
299 	int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;
311  *	cmd646r1_bmdma_stop	-	DMA stop callback
380 		{	/* CMD 643 - no UDMA */
386 		{	/* CMD 646 with broken UDMA */
392 		{	/* CMD 646U with broken UDMA */
398 		{	/* CMD 646U2 with working UDMA */
427 		&cmd_info[id->driver_data],
428 		&cmd_info[id->driver_data],
433 	struct pci_dev *bridge = pdev->bus->self;
435 	int port_ok = !(bridge && bridge->vendor ==
438 	int cntrl_ch0_ok = (id->driver_data != 0);
444 	if (id->driver_data == 0)	/* 643 */
447 	if (pdev->device == PCI_DEVICE_ID_CMD_646)
448 		switch (pdev->revision) {
449 		/* UDMA works since rev 5 */
477 		dev_notice(&pdev->dev, "Mobility Bridge detected, ignoring CNTRL port enable/disable\n");
479 		dev_notice(&pdev->dev, "Primary port is disabled\n");
484 		dev_notice(&pdev->dev, "Secondary port is disabled\n");
531 MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");