patch-2.3.99-pre1 linux/drivers/block/ali14xx.c

• Lines: 226
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.51/linux/drivers/block/ali14xx.c
• Orig date: Tue Mar 7 14:32:25 2000

diff -u --recursive --new-file v2.3.51/linux/drivers/block/ali14xx.c linux/drivers/block/ali14xx.c
@@ -1,225 +0,0 @@
-/*
- *  linux/drivers/block/ali14xx.c		Version 0.03	Feb 09, 1996
- *
- *  Copyright (C) 1996  Linus Torvalds & author (see below)
- */
-
-/*
- * ALI M14xx chipset EIDE controller
- *
- * Works for ALI M1439/1443/1445/1487/1489 chipsets.
- *
- * Adapted from code developed by derekn@vw.ece.cmu.edu.  -ml
- * Derek's notes follow:
- *
- * I think the code should be pretty understandable,
- * but I'll be happy to (try to) answer questions.
- *
- * The critical part is in the setupDrive function.  The initRegisters
- * function doesn't seem to be necessary, but the DOS driver does it, so
- * I threw it in.
- *
- * I've only tested this on my system, which only has one disk.  I posted
- * it to comp.sys.linux.hardware, so maybe some other people will try it
- * out.
- *
- * Derek Noonburg  (derekn@ece.cmu.edu)
- * 95-sep-26
- *
- * Update 96-jul-13:
- *
- * I've since upgraded to two disks and a CD-ROM, with no trouble, and
- * I've also heard from several others who have used it successfully.
- * This driver appears to work with both the 1443/1445 and the 1487/1489
- * chipsets.  I've added support for PIO mode 4 for the 1487.  This
- * seems to work just fine on the 1443 also, although I'm not sure it's
- * advertised as supporting mode 4.  (I've been running a WDC AC21200 in
- * mode 4 for a while now with no trouble.)  -Derek
- */
-
-#undef REALLY_SLOW_IO           /* most systems can safely undef this */
-
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
-#include <linux/hdreg.h>
-#include <linux/ide.h>
-
-#include <asm/io.h>
-
-#include "ide_modes.h"
-
-/* port addresses for auto-detection */
-#define ALI_NUM_PORTS 4
-static int ports[ALI_NUM_PORTS] __initdata = {0x074, 0x0f4, 0x034, 0x0e4};
-
-/* register initialization data */
-typedef struct { byte reg, data; } RegInitializer;
-
-static RegInitializer initData[] __initdata = {
-	{0x01, 0x0f}, {0x02, 0x00}, {0x03, 0x00}, {0x04, 0x00},
-	{0x05, 0x00}, {0x06, 0x00}, {0x07, 0x2b}, {0x0a, 0x0f},
-	{0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
-	{0x29, 0x00}, {0x2a, 0x00}, {0x2f, 0x00}, {0x2b, 0x00},
-	{0x2c, 0x00}, {0x2d, 0x00}, {0x2e, 0x00}, {0x30, 0x00},
-	{0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00}, {0x34, 0xff},
-	{0x35, 0x03}, {0x00, 0x00}
-};
-
-#define ALI_MAX_PIO 4
-
-/* timing parameter registers for each drive */
-static struct { byte reg1, reg2, reg3, reg4; } regTab[4] = {
-	{0x03, 0x26, 0x04, 0x27},     /* drive 0 */
-	{0x05, 0x28, 0x06, 0x29},     /* drive 1 */
-	{0x2b, 0x30, 0x2c, 0x31},     /* drive 2 */
-	{0x2d, 0x32, 0x2e, 0x33},     /* drive 3 */
-};
-
-static int basePort = 0;	/* base port address */
-static int regPort = 0;		/* port for register number */
-static int dataPort = 0;	/* port for register data */
-static byte regOn;	/* output to base port to access registers */
-static byte regOff;	/* output to base port to close registers */
-
-/*------------------------------------------------------------------------*/
-
-/*
- * Read a controller register.
- */
-static inline byte inReg (byte reg)
-{
-	outb_p(reg, regPort);
-	return inb(dataPort);
-}
-
-/*
- * Write a controller register.
- */
-static void outReg (byte data, byte reg)
-{
-	outb_p(reg, regPort);
-	outb_p(data, dataPort);
-}
-
-/*
- * Set PIO mode for the specified drive.
- * This function computes timing parameters
- * and sets controller registers accordingly.
- */
-static void ali14xx_tune_drive (ide_drive_t *drive, byte pio)
-{
-	int driveNum;
-	int time1, time2;
-	byte param1, param2, param3, param4;
-	unsigned long flags;
-	ide_pio_data_t d;
-	int bus_speed = ide_system_bus_speed();
-
-	pio = ide_get_best_pio_mode(drive, pio, ALI_MAX_PIO, &d);
-
-	/* calculate timing, according to PIO mode */
-	time1 = d.cycle_time;
-	time2 = ide_pio_timings[pio].active_time;
-	param3 = param1 = (time2 * bus_speed + 999) / 1000;
-	param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1;
-	if (pio < 3) {
-		param3 += 8;
-		param4 += 8;
-	}
-	printk("%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n",
-		drive->name, pio, time1, time2, param1, param2, param3, param4);
-
-	/* stuff timing parameters into controller registers */
-	driveNum = (HWIF(drive)->index << 1) + drive->select.b.unit;
-	save_flags(flags);	/* all CPUs */
-	cli();			/* all CPUs */
-	outb_p(regOn, basePort);
-	outReg(param1, regTab[driveNum].reg1);
-	outReg(param2, regTab[driveNum].reg2);
-	outReg(param3, regTab[driveNum].reg3);
-	outReg(param4, regTab[driveNum].reg4);
-	outb_p(regOff, basePort);
-	restore_flags(flags);	/* all CPUs */
-}
-
-/*
- * Auto-detect the IDE controller port.
- */
-static int __init findPort (void)
-{
-	int i;
-	byte t;
-	unsigned long flags;
-
-	__save_flags(flags);	/* local CPU only */
-	__cli();		/* local CPU only */
-	for (i = 0; i < ALI_NUM_PORTS; ++i) {
-		basePort = ports[i];
-		regOff = inb(basePort);
-		for (regOn = 0x30; regOn <= 0x33; ++regOn) {
-			outb_p(regOn, basePort);
-			if (inb(basePort) == regOn) {
-				regPort = basePort + 4;
-				dataPort = basePort + 8;
-				t = inReg(0) & 0xf0;
-				outb_p(regOff, basePort);
-				__restore_flags(flags);	/* local CPU only */
-				if (t != 0x50)
-					return 0;
-				return 1;  /* success */
-			}
-		}
-		outb_p(regOff, basePort);
-	}
-	__restore_flags(flags);	/* local CPU only */
-	return 0;
-}
-
-/*
- * Initialize controller registers with default values.
- */
-static int __init initRegisters (void) {
-	RegInitializer *p;
-	byte t;
-	unsigned long flags;
-
-	__save_flags(flags);	/* local CPU only */
-	__cli();		/* local CPU only */
-	outb_p(regOn, basePort);
-	for (p = initData; p->reg != 0; ++p)
-		outReg(p->data, p->reg);
-	outb_p(0x01, regPort);
-	t = inb(regPort) & 0x01;
-	outb_p(regOff, basePort);
-	__restore_flags(flags);	/* local CPU only */
-	return t;
-}
-
-void __init init_ali14xx (void)
-{
-	/* auto-detect IDE controller port */
-	if (!findPort()) {
-		printk("\nali14xx: not found");
-		return;
-	}
-
-	printk("\nali14xx: base= 0x%03x, regOn = 0x%02x", basePort, regOn);
-	ide_hwifs[0].chipset = ide_ali14xx;
-	ide_hwifs[1].chipset = ide_ali14xx;
-	ide_hwifs[0].tuneproc = &ali14xx_tune_drive;
-	ide_hwifs[1].tuneproc = &ali14xx_tune_drive;
-	ide_hwifs[0].mate = &ide_hwifs[1];
-	ide_hwifs[1].mate = &ide_hwifs[0];
-	ide_hwifs[1].channel = 1;
-
-	/* initialize controller registers */
-	if (!initRegisters()) {
-		printk("\nali14xx: Chip initialization failed");
-		return;
-	}
-}