1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_cmd64x.c 	- CMD64x PATA for new ATA layer
4  *			  (C) 2005 Red Hat Inc
6  *			  (C) 2009-2010 Bartlomiej Zolnierkiewicz
7  *			  (C) 2012 MontaVista Software, LLC <source@mvista.com>
10  * linux/drivers/ide/pci/cmd64x.c		Version 1.30	Sept 10, 2002
12  * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines.
18  * Copyright (C) 1998		Eddie C. Dost  (ecd@skynet.be)
19  * Copyright (C) 1998		David S. Miller (davem@redhat.com)
21  * Copyright (C) 1999-2002	Andre Hedrick <andre@linux-ide.org>
75 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd648_cable_detect()
80 	if (r & (1 << ap->port_no))  in cmd648_cable_detect()
86  *	cmd64x_set_timing	-	set PIO and MWDMA timing
96 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd64x_set_timing()
113 	int arttim = arttim_port[ap->port_no][adev->devno];  in cmd64x_set_timing()
114 	int drwtim = drwtim_port[ap->port_no][adev->devno];  in cmd64x_set_timing()
122 	if (ap->port_no) {  in cmd64x_set_timing()
128 			ata_timing_compute(pair, pair->pio_mode, &tp, T, 0);  in cmd64x_set_timing()
136 		t.active += t.recover - 16;  in cmd64x_set_timing()
148 		t.recover--;  in cmd64x_set_timing()
170  *	cmd64x_set_piomode	-	set initial PIO mode data
180 	cmd64x_set_timing(ap, adev, adev->pio_mode);  in cmd64x_set_piomode()
184  *	cmd64x_set_dmamode	-	set initial DMA mode data
197 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd64x_set_dmamode()
200 	int pciU = UDIDETCR0 + 8 * ap->port_no;  in cmd64x_set_dmamode()
201 	int pciD = BMIDESR0 + 8 * ap->port_no;  in cmd64x_set_dmamode()
202 	int shift = 2 * adev->devno;  in cmd64x_set_dmamode()
208 	regD &= ~(0x20 << adev->devno);  in cmd64x_set_dmamode()
212 	regU &= ~(0x05 << adev->devno);  in cmd64x_set_dmamode()
214 	if (adev->dma_mode >= XFER_UDMA_0) {  in cmd64x_set_dmamode()
216 		regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;  in cmd64x_set_dmamode()
218 		regU |= 1 << adev->devno; /* UDMA on */  in cmd64x_set_dmamode()
219 		if (adev->dma_mode > XFER_UDMA_2) /* 15nS timing */  in cmd64x_set_dmamode()
220 			regU |= 4 << adev->devno;  in cmd64x_set_dmamode()
222 		regU &= ~ (1 << adev->devno);	/* UDMA off */  in cmd64x_set_dmamode()
223 		cmd64x_set_timing(ap, adev, adev->dma_mode);  in cmd64x_set_dmamode()
226 	regD |= 0x20 << adev->devno;  in cmd64x_set_dmamode()
233  *	cmd64x_sff_irq_check	-	check IDE interrupt
241 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd64x_sff_irq_check()
242 	int irq_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;  in cmd64x_sff_irq_check()
243 	int irq_reg  = ap->port_no ? ARTTIM23 : CFR;  in cmd64x_sff_irq_check()
253  *	cmd64x_sff_irq_clear	-	clear IDE interrupt
261 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd64x_sff_irq_clear()
262 	int irq_reg = ap->port_no ? ARTTIM23 : CFR;  in cmd64x_sff_irq_clear()
272  *	cmd648_sff_irq_check	-	check IDE interrupt
280 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd648_sff_irq_check()
282 	int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;  in cmd648_sff_irq_check()
289  *	cmd648_sff_irq_clear	-	clear IDE interrupt
297 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in cmd648_sff_irq_clear()
299 	int irq_mask = ap->port_no ? MRDMODE_INTR_CH1 : MRDMODE_INTR_CH0;  in cmd648_sff_irq_clear()
311  *	cmd646r1_bmdma_stop	-	DMA stop callback
380 		{	/* CMD 643 - no UDMA */  in cmd64x_init_one()
386 		{	/* CMD 646 with broken UDMA */  in cmd64x_init_one()
392 		{	/* CMD 646U with broken UDMA */  in cmd64x_init_one()
398 		{	/* CMD 646U2 with working UDMA */  in cmd64x_init_one()
427 		&cmd_info[id->driver_data],  in cmd64x_init_one()
428 		&cmd_info[id->driver_data],  in cmd64x_init_one()
433 	struct pci_dev *bridge = pdev->bus->self;  in cmd64x_init_one()
435 	int port_ok = !(bridge && bridge->vendor ==  in cmd64x_init_one()
438 	int cntrl_ch0_ok = (id->driver_data != 0);  in cmd64x_init_one()
444 	if (id->driver_data == 0)	/* 643 */  in cmd64x_init_one()
447 	if (pdev->device == PCI_DEVICE_ID_CMD_646)  in cmd64x_init_one()
448 		switch (pdev->revision) {  in cmd64x_init_one()
449 		/* UDMA works since rev 5 */  in cmd64x_init_one()
477 		dev_notice(&pdev->dev, "Mobility Bridge detected, ignoring CNTRL port enable/disable\n");  in cmd64x_init_one()
479 		dev_notice(&pdev->dev, "Primary port is disabled\n");  in cmd64x_init_one()
484 		dev_notice(&pdev->dev, "Secondary port is disabled\n");  in cmd64x_init_one()
531 MODULE_DESCRIPTION("low-level driver for CMD64x series PATA controllers");