patch-2.3.99-pre1 linux/drivers/block/ns87415.c

• Lines: 186
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.51/linux/drivers/block/ns87415.c
• Orig date: Sat Feb 26 22:31:44 2000

diff -u --recursive --new-file v2.3.51/linux/drivers/block/ns87415.c linux/drivers/block/ns87415.c
@@ -1,185 +0,0 @@
-/*
- * linux/drivers/block/ns87415.c		Version 1.00  December 7, 1997
- *
- * Copyright (C) 1997-1998  Mark Lord
- * Copyright (C) 1998       Eddie C. Dost  (ecd@skynet.be)
- *
- * Inspired by an earlier effort from David S. Miller (davem@caipfs.rutgers.edu)
- */
-
-#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 <asm/io.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;
-
-	__save_flags(flags);	/* local CPU only */
-	__cli();		/* local CPU only */
-	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);
-	}
-
-	__restore_flags(flags);	/* local CPU only */
-}
-
-static void ns87415_selectproc (ide_drive_t *drive)
-{
-	ns87415_prepare_drive (drive, drive->using_dma);
-}
-
-static int ns87415_dmaproc(ide_dma_action_t func, ide_drive_t *drive)
-{
-	ide_hwif_t	*hwif = HWIF(drive);
-	byte		dma_stat;
-
-	switch (func) {
-		case ide_dma_end: /* returns 1 on error, 0 otherwise */
-			drive->waiting_for_dma = 0;
-			dma_stat = inb(hwif->dma_base+2);
-			outb(inb(hwif->dma_base)&~1, hwif->dma_base);	/* stop DMA */
-			outb(inb(hwif->dma_base)|6, hwif->dma_base);	/* from ERRATA: clear the INTR & ERROR bits */
-			ide_destroy_dmatable(drive);			/* and free any DMA resources */
-			return (dma_stat & 7) != 4;		/* verify good DMA status */
-		case ide_dma_write:
-		case ide_dma_read:
-			ns87415_prepare_drive(drive, 1);	/* select DMA xfer */
-			if (!ide_dmaproc(func, drive))		/* use standard DMA stuff */
-				return 0;
-			ns87415_prepare_drive(drive, 0);	/* DMA failed: select PIO xfer */
-			return 1;
-		case ide_dma_check:
-			if (drive->media != ide_disk)
-				return ide_dmaproc(ide_dma_off_quietly, drive);
-			/* Fallthrough... */
-		default:
-			return ide_dmaproc(func, drive);	/* use standard DMA stuff */
-	}
-}
-
-void __init ide_init_ns87415 (ide_hwif_t *hwif)
-{
-	struct pci_dev *dev = hwif->pci_dev;
-	unsigned int ctrl, using_inta;
-	byte progif;
-#ifdef __sparc_v9__
-	int timeout;
-	byte stat;
-#endif
-
-	/* 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;
-		outb(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
-		udelay(10);
-		outb(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
-		do {
-			udelay(50);
-			stat = inb(hwif->io_ports[IDE_STATUS_OFFSET]);
-                	if (stat == 0xff)
-                        	break;
-        	} while ((stat & BUSY_STAT) && --timeout);
-#endif
-	}
-
-	if (hwif->dma_base)
-		outb(0x60, hwif->dma_base + 2);
-
-	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)
-		hwif->dmaproc = &ns87415_dmaproc;
-	hwif->selectproc = &ns87415_selectproc;
-}