patch-2.4.21 linux-2.4.21/drivers/ide/sl82c105.c

• Lines: 275
• Date: 1969-12-31 16:00:00.000000000 -0800
• Orig file: linux-2.4.20/drivers/ide/sl82c105.c
• Orig date: 2001-09-07 10:45:30.000000000 -0700

diff -urN linux-2.4.20/drivers/ide/sl82c105.c linux-2.4.21/drivers/ide/sl82c105.c
@@ -1,274 +0,0 @@
-/*
- * linux/drivers/ide/sl82c105.c
- *
- * SL82C105/Winbond 553 IDE driver
- *
- * Maintainer unknown.
- *
- * Drive tuning added from Rebel.com's kernel sources
- *  -- Russell King (15/11/98) linux@arm.linux.org.uk
- */
-
-#include <linux/config.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/ide.h>
-
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include "ide_modes.h"
-
-extern char *ide_xfer_verbose (byte xfer_rate);
-
-/*
- * Convert a PIO mode and cycle time to the required on/off
- * times for the interface.  This has protection against run-away
- * timings.
- */
-static unsigned int get_timing_sl82c105(ide_pio_data_t *p)
-{
-	unsigned int cmd_on;
-	unsigned int cmd_off;
-
-	cmd_on = (ide_pio_timings[p->pio_mode].active_time + 29) / 30;
-	cmd_off = (p->cycle_time - 30 * cmd_on + 29) / 30;
-
-	if (cmd_on > 32)
-		cmd_on = 32;
-	if (cmd_on == 0)
-		cmd_on = 1;
-
-	if (cmd_off > 32)
-		cmd_off = 32;
-	if (cmd_off == 0)
-		cmd_off = 1;
-
-	return (cmd_on - 1) << 8 | (cmd_off - 1) | (p->use_iordy ? 0x40 : 0x00);
-}
-
-/*
- * Configure the drive and chipset for PIO
- */
-static void config_for_pio(ide_drive_t *drive, int pio, int report)
-{
-	ide_hwif_t *hwif = HWIF(drive);
-	struct pci_dev *dev = hwif->pci_dev;
-	ide_pio_data_t p;
-	unsigned short drv_ctrl = 0x909;
-	unsigned int xfer_mode, reg;
-
-	reg = (hwif->channel ? 0x4c : 0x44) + (drive->select.b.unit ? 4 : 0);
-
-	pio = ide_get_best_pio_mode(drive, pio, 5, &p);
-
-	switch (pio) {
-	default:
-	case 0:		xfer_mode = XFER_PIO_0;		break;
-	case 1:		xfer_mode = XFER_PIO_1;		break;
-	case 2:		xfer_mode = XFER_PIO_2;		break;
-	case 3:		xfer_mode = XFER_PIO_3;		break;
-	case 4:		xfer_mode = XFER_PIO_4;		break;
-	}
-
-	if (ide_config_drive_speed(drive, xfer_mode) == 0)
-		drv_ctrl = get_timing_sl82c105(&p);
-
-	if (drive->using_dma == 0) {
-		/*
-		 * If we are actually using MW DMA, then we can not
-		 * reprogram the interface drive control register.
-		 */
-		pci_write_config_word(dev, reg, drv_ctrl);
-		pci_read_config_word(dev, reg, &drv_ctrl);
-
-		if (report) {
-			printk("%s: selected %s (%dns) (%04X)\n", drive->name,
-			       ide_xfer_verbose(xfer_mode), p.cycle_time, drv_ctrl);
-		}
-	}
-}
-
-/*
- * Configure the drive and the chipset for DMA
- */
-static int config_for_dma(ide_drive_t *drive)
-{
-	ide_hwif_t *hwif = HWIF(drive);
-	struct pci_dev *dev = hwif->pci_dev;
-	unsigned short drv_ctrl = 0x909;
-	unsigned int reg;
-
-	reg = (hwif->channel ? 0x4c : 0x44) + (drive->select.b.unit ? 4 : 0);
-
-	if (ide_config_drive_speed(drive, XFER_MW_DMA_2) == 0)
-		drv_ctrl = 0x0240;
-
-	pci_write_config_word(dev, reg, drv_ctrl);
-
-	return 0;
-}
-
-/*
- * Check to see if the drive and
- * chipset is capable of DMA mode
- */
-static int sl82c105_check_drive(ide_drive_t *drive)
-{
-	ide_dma_action_t dma_func = ide_dma_off_quietly;
-
-	do {
-		struct hd_driveid *id = drive->id;
-		ide_hwif_t *hwif = HWIF(drive);
-
-		if (!hwif->autodma)
-			break;
-
-		if (!id || !(id->capability & 1))
-			break;
-
-		/* Consult the list of known "bad" drives */
-		if (ide_dmaproc(ide_dma_bad_drive, drive)) {
-			dma_func = ide_dma_off;
-			break;
-		}
-
-		if (id->field_valid & 2) {
-			if  (id->dma_mword & 7 || id->dma_1word & 7)
-				dma_func = ide_dma_on;
-			break;
-		}
-
-		if (ide_dmaproc(ide_dma_good_drive, drive)) {
-			dma_func = ide_dma_on;
-			break;
-		}
-	} while (0);
-
-	return HWIF(drive)->dmaproc(dma_func, drive);
-}
-
-/*
- * Our own dmaproc, only to intercept ide_dma_check
- */
-static int sl82c105_dmaproc(ide_dma_action_t func, ide_drive_t *drive)
-{
-	switch (func) {
-	case ide_dma_check:
-		return sl82c105_check_drive(drive);
-	case ide_dma_on:
-		if (config_for_dma(drive))
-			func = ide_dma_off;
-		/* fall through */
-	case ide_dma_off_quietly:
-	case ide_dma_off:
-		config_for_pio(drive, 4, 0);
-		break;
-	default:
-		break;
-	}
-	return ide_dmaproc(func, drive);
-}
-
-/*
- * We only deal with PIO mode here - DMA mode 'using_dma' is not
- * initialised at the point that this function is called.
- */
-static void tune_sl82c105(ide_drive_t *drive, byte pio)
-{
-	config_for_pio(drive, pio, 1);
-
-	/*
-	 * We support 32-bit I/O on this interface, and it
-	 * doesn't have problems with interrupts.
-	 */
-	drive->io_32bit = 1;
-	drive->unmask = 1;
-}
-
-/*
- * Return the revision of the Winbond bridge
- * which this function is part of.
- */
-static unsigned int sl82c105_bridge_revision(struct pci_dev *dev)
-{
-	struct pci_dev *bridge;
-	unsigned char rev;
-
-	bridge = pci_find_device(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_83C553, NULL);
-
-	/*
-	 * If we are part of a Winbond 553
-	 */
-	if (!bridge || bridge->class >> 8 != PCI_CLASS_BRIDGE_ISA)
-		return -1;
-
-	if (bridge->bus != dev->bus ||
-	    PCI_SLOT(bridge->devfn) != PCI_SLOT(dev->devfn))
-		return -1;
-
-	/*
-	 * We need to find function 0's revision, not function 1
-	 */
-	pci_read_config_byte(bridge, PCI_REVISION_ID, &rev);
-
-	return rev;
-}
-
-/*
- * Enable the PCI device
- */
-unsigned int __init pci_init_sl82c105(struct pci_dev *dev, const char *msg)
-{
-	unsigned char ctrl_stat;
-
-	/*
-	 * Enable the ports
-	 */
-	pci_read_config_byte(dev, 0x40, &ctrl_stat);
-	pci_write_config_byte(dev, 0x40, ctrl_stat | 0x33);
-
-	return dev->irq;
-}
-
-void __init dma_init_sl82c105(ide_hwif_t *hwif, unsigned long dma_base)
-{
-	unsigned int rev;
-	byte dma_state;
-
-	dma_state = inb(dma_base + 2);
-	rev = sl82c105_bridge_revision(hwif->pci_dev);
-	if (rev <= 5) {
-		hwif->autodma = 0;
-		hwif->drives[0].autotune = 1;
-		hwif->drives[1].autotune = 1;
-		printk("    %s: Winbond 553 bridge revision %d, BM-DMA disabled\n",
-		       hwif->name, rev);
-		dma_state &= ~0x60;
-	} else {
-		dma_state |= 0x60;
-		hwif->autodma = 1;
-	}
-	outb(dma_state, dma_base + 2);
-
-	hwif->dmaproc = NULL;
-	ide_setup_dma(hwif, dma_base, 8);
-	if (hwif->dmaproc)
-		hwif->dmaproc = sl82c105_dmaproc;
-}
-
-/*
- * Initialise the chip
- */
-void __init ide_init_sl82c105(ide_hwif_t *hwif)
-{
-	hwif->tuneproc = tune_sl82c105;
-}
-