/* * linux/drivers/ide/pci/ns87415.c		Version 2.00  Sep. 10, 2002 * * Copyright (C) 1997-1998	Mark Lord <mlord@pobox.com> * Copyright (C) 1998		Eddie C. Dost <ecd@skynet.be> * Copyright (C) 1999-2000	Andre Hedrick <andre@linux-ide.org> * * Inspired by an earlier effort from David S. Miller <davem@redhat.com> */#include <linux/config.h>#include <linux/module.h>#include <linux/types.h>#include <linux/kernel.h>#include <linux/timer.h>#include <linux/mm.h>#include <linux/ioport.h>#include <linux/interrupt.h>#include <linux/blkdev.h>#include <linux/hdreg.h>#include <linux/pci.h>#include <linux/delay.h>#include <linux/ide.h>#include <linux/init.h>#include <asm/io.h>#include "ns87415.h"static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };/* * This routine either enables/disables (according to drive->present) * the IRQ associated with the port (HWIF(drive)), * and selects either PIO or DMA handshaking for the next I/O operation. */static void ns87415_prepare_drive (ide_drive_t *drive, unsigned int use_dma){	ide_hwif_t *hwif = HWIF(drive);	unsigned int bit, other, new, *old = (unsigned int *) hwif->select_data;	struct pci_dev *dev = hwif->pci_dev;	unsigned long flags;	local_irq_save(flags);	new = *old;	/* Adjust IRQ enable bit */	bit = 1 << (8 + hwif->channel);	new = drive->present ? (new & ~bit) : (new | bit);	/* Select PIO or DMA, DMA may only be selected for one drive/channel. */	bit   = 1 << (20 + drive->select.b.unit       + (hwif->channel << 1));	other = 1 << (20 + (1 - drive->select.b.unit) + (hwif->channel << 1));	new = use_dma ? ((new & ~other) | bit) : (new & ~bit);	if (new != *old) {		unsigned char stat;		/*		 * Don't change DMA engine settings while Write Buffers		 * are busy.		 */		(void) pci_read_config_byte(dev, 0x43, &stat);		while (stat & 0x03) {			udelay(1);			(void) pci_read_config_byte(dev, 0x43, &stat);		}		*old = new;		(void) pci_write_config_dword(dev, 0x40, new);		/*		 * And let things settle...		 */		udelay(10);	}	local_irq_restore(flags);}static void ns87415_selectproc (ide_drive_t *drive){	ns87415_prepare_drive (drive, drive->using_dma);}static int ns87415_ide_dma_end (ide_drive_t *drive){	ide_hwif_t      *hwif = HWIF(drive);	u8 dma_stat = 0, dma_cmd = 0;	drive->waiting_for_dma = 0;	dma_stat = hwif->INB(hwif->dma_status);	/* get dma command mode */	dma_cmd = hwif->INB(hwif->dma_command);	/* stop DMA */	hwif->OUTB(dma_cmd & ~1, hwif->dma_command);	/* from ERRATA: clear the INTR & ERROR bits */	dma_cmd = hwif->INB(hwif->dma_command);	hwif->OUTB(dma_cmd|6, hwif->dma_command);	/* and free any DMA resources */	ide_destroy_dmatable(drive);	/* verify good DMA status */	return (dma_stat & 7) != 4;}static int ns87415_ide_dma_read (ide_drive_t *drive){	/* select DMA xfer */	ns87415_prepare_drive(drive, 1);	if (!(__ide_dma_read(drive)))		return 0;	/* DMA failed: select PIO xfer */	ns87415_prepare_drive(drive, 0);	return 1;}static int ns87415_ide_dma_write (ide_drive_t *drive){	/* select DMA xfer */	ns87415_prepare_drive(drive, 1);	if (!(__ide_dma_write(drive)))		return 0;	/* DMA failed: select PIO xfer */	ns87415_prepare_drive(drive, 0);	return 1;}static int ns87415_ide_dma_check (ide_drive_t *drive){	if (drive->media != ide_disk)		return HWIF(drive)->ide_dma_off_quietly(drive);	return __ide_dma_check(drive);}static void __init init_hwif_ns87415 (ide_hwif_t *hwif){	struct pci_dev *dev = hwif->pci_dev;	unsigned int ctrl, using_inta;	u8 progif;#ifdef __sparc_v9__	int timeout;	u8 stat;#endif	hwif->autodma = 0;	hwif->selectproc = &ns87415_selectproc;	/* Set a good latency timer and cache line size value. */	(void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64);#ifdef __sparc_v9__	(void) pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 0x10);#endif	/*	 * We cannot probe for IRQ: both ports share common IRQ on INTA.	 * Also, leave IRQ masked during drive probing, to prevent infinite	 * interrupts from a potentially floating INTA..	 *	 * IRQs get unmasked in selectproc when drive is first used.	 */	(void) pci_read_config_dword(dev, 0x40, &ctrl);	(void) pci_read_config_byte(dev, 0x09, &progif);	/* is irq in "native" mode? */	using_inta = progif & (1 << (hwif->channel << 1));	if (!using_inta)		using_inta = ctrl & (1 << (4 + hwif->channel));	if (hwif->mate) {		hwif->select_data = hwif->mate->select_data;	} else {		hwif->select_data = (unsigned long)					&ns87415_control[ns87415_count++];		ctrl |= (1 << 8) | (1 << 9);	/* mask both IRQs */		if (using_inta)			ctrl &= ~(1 << 6);	/* unmask INTA */		*((unsigned int *)hwif->select_data) = ctrl;		(void) pci_write_config_dword(dev, 0x40, ctrl);		/*		 * Set prefetch size to 512 bytes for both ports,		 * but don't turn on/off prefetching here.		 */		pci_write_config_byte(dev, 0x55, 0xee);#ifdef __sparc_v9__		/*		 * XXX: Reset the device, if we don't it will not respond		 *      to SELECT_DRIVE() properly during first probe_hwif().		 */		timeout = 10000;		hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);		udelay(10);		hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);		do {			udelay(50);			stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);                	if (stat == 0xff)                        	break;        	} while ((stat & BUSY_STAT) && --timeout);#endif	}	if (!using_inta)		hwif->irq = hwif->channel ? 15 : 14;	/* legacy mode */	else if (!hwif->irq && hwif->mate && hwif->mate->irq)		hwif->irq = hwif->mate->irq;	/* share IRQ with mate */	if (!hwif->dma_base)		return;	hwif->OUTB(0x60, hwif->dma_status);	hwif->ide_dma_read = &ns87415_ide_dma_read;	hwif->ide_dma_write = &ns87415_ide_dma_write;	hwif->ide_dma_check = &ns87415_ide_dma_check;	hwif->ide_dma_end = &ns87415_ide_dma_end;	if (!noautodma)		hwif->autodma = 1;	hwif->drives[0].autodma = hwif->autodma;	hwif->drives[1].autodma = hwif->autodma;}static void __init init_dma_ns87415 (ide_hwif_t *hwif, unsigned long dmabase){	ide_setup_dma(hwif, dmabase, 8);}extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);static int __devinit ns87415_init_one(struct pci_dev *dev, const struct pci_device_id *id){	ide_pci_device_t *d = &ns87415_chipsets[id->driver_data];	if (dev->device != d->device)		BUG();	ide_setup_pci_device(dev, d);	MOD_INC_USE_COUNT;	return 0;}static struct pci_device_id ns87415_pci_tbl[] __devinitdata = {	{ PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87415, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},	{ 0, },};static struct pci_driver driver = {	.name		= "NS87415IDE",	.id_table	= ns87415_pci_tbl,	.probe		= ns87415_init_one,};static int ns87415_ide_init(void){	return ide_pci_register_driver(&driver);}static void ns87415_ide_exit(void){	ide_pci_unregister_driver(&driver);}module_init(ns87415_ide_init);module_exit(ns87415_ide_exit);MODULE_AUTHOR("Mark Lord, Eddie Dost, Andre Hedrick");MODULE_DESCRIPTION("PCI driver module for NS87415 IDE");MODULE_LICENSE("GPL");EXPORT_NO_SYMBOLS;