patch-2.4.10 linux/drivers/ide/qd65xx.c

• Lines: 454
• Date: Fri Sep 7 09:28:38 2001
• Orig file: v2.4.9/linux/drivers/ide/qd65xx.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/drivers/ide/qd65xx.c linux/drivers/ide/qd65xx.c
@@ -0,0 +1,453 @@
+/*
+ *  linux/drivers/ide/qd65xx.c		Version 0.06	Aug 3, 2000
+ *
+ *  Copyright (C) 1996-2000  Linus Torvalds & author (see below)
+ */
+
+/*
+ *  Version 0.03	Cleaned auto-tune, added probe
+ *  Version 0.04	Added second channel tuning
+ *  Version 0.05	Enhanced tuning ; added qd6500 support
+ *  Version 0.06	added dos driver's list
+ *
+ * QDI QD6500/QD6580 EIDE controller fast support
+ *
+ * Please set local bus speed using kernel parameter idebus
+ * 	for example, "idebus=33" stands for 33Mhz VLbus
+ * To activate controller support, use "ide0=qd65xx"
+ * To enable tuning, use "ide0=autotune"
+ * To enable second channel tuning (qd6580 only), use "ide1=autotune"
+ */
+
+/*
+ * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
+ * Samuel Thibault <samuel.thibault@fnac.net>
+ */
+
+#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 <linux/init.h>
+#include <asm/io.h>
+
+#include "ide_modes.h"
+#include "qd65xx.h"
+
+/*
+ * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
+ *            or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
+ *	-- qd6500 is a single IDE interface
+ *	-- qd6580 is a dual IDE interface
+ *
+ * More research on qd6580 being done by willmore@cig.mot.com (David)
+ * More Information given by Petr Soucek (petr@ryston.cz)
+ * http://www.ryston.cz/petr/vlb
+ */
+
+/*
+ * base: Timer1
+ *
+ *
+ * base+0x01: Config (R/O)
+ *
+ * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
+ * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
+ * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
+ * bit 3: qd6500: 1 = disabled, 0 = enabled
+ *        qd6580: 1
+ * upper nibble:
+ *        qd6500: 1100
+ *        qd6580: either 1010 or 0101
+ *
+ * base+0x02: Timer2 (qd6580 only)
+ *
+ *
+ * base+0x03: Control (qd6580 only)
+ *
+ * bits 0-3 must always be set 1
+ * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
+ * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
+ *         0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
+ *                                                   channel 1 for hdc & hdd
+ * bit 1 : 1 = only disks on primary port
+ *         0 = disks & ATAPI devices on primary port
+ * bit 2-4 : always 0
+ * bit 5 : status, but of what ?
+ * bit 6 : always set 1 by dos driver
+ * bit 7 : set 1 for non-ATAPI devices on primary port
+ * 	(maybe read-ahead and post-write buffer ?)
+ */
+
+static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
+
+static void qd_write_reg (byte content, byte reg)
+{
+	unsigned long flags;
+
+	save_flags(flags);	/* all CPUs */
+	cli();			/* all CPUs */
+	outb(content,reg);
+	restore_flags(flags);	/* all CPUs */
+}
+
+byte __init qd_read_reg (byte reg)
+{
+	unsigned long flags;
+	byte read;
+
+	save_flags(flags);	/* all CPUs */
+	cli();			/* all CPUs */
+	read = inb(reg);
+	restore_flags(flags);	/* all CPUs */
+	return read;
+}
+
+/*
+ * qd_select:
+ *
+ * This routine is invoked from ide.c to prepare for access to a given drive.
+ */
+
+static void qd_select (ide_drive_t *drive)
+{
+	byte index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
+			(QD_TIMREG(drive) & 0x02);
+
+	if (timings[index] != QD_TIMING(drive))
+		qd_write_reg(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
+}
+
+/*
+ * qd6500_compute_timing
+ *
+ * computes the timing value where
+ * 	lower nibble represents active time,   in count of VLB clocks
+ * 	upper nibble represents recovery time, in count of VLB clocks
+ */
+
+static byte qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
+{
+	byte active_cycle,recovery_cycle;
+
+	if (system_bus_clock()<=33) {
+		active_cycle =   9  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 9);
+		recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
+	} else {
+		active_cycle =   8  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 1, 8);
+		recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
+	}
+
+	return((recovery_cycle<<4) | 0x08 | active_cycle);
+}
+
+/*
+ * qd6580_compute_timing
+ *
+ * idem for qd6580
+ */
+
+static byte qd6580_compute_timing (int active_time, int recovery_time)
+{
+	byte active_cycle   = 17-IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 17);
+	byte recovery_cycle = 15-IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
+
+	return((recovery_cycle<<4) | active_cycle);
+}
+
+/*
+ * qd_find_disk_type
+ *
+ * tries to find timing from dos driver's table
+ */
+
+static int qd_find_disk_type (ide_drive_t *drive,
+		int *active_time, int *recovery_time)
+{
+	struct qd65xx_timing_s *p;
+	char model[40];
+
+	if (!*drive->id->model) return 0;
+
+	strncpy(model,drive->id->model,40);
+	ide_fixstring(model,40,1); /* byte-swap */
+
+	for (p = qd65xx_timing ; p->offset != -1 ; p++) {
+		if (!strncmp(p->model, model+p->offset,4)) {
+			printk(KERN_DEBUG "%s: listed !\n",drive->name);
+			*active_time = p->active;
+			*recovery_time = p->recovery;
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * qd_timing_ok:
+ *
+ * check whether timings don't conflict
+ */
+
+static int qd_timing_ok (ide_drive_t drives[])
+{
+	return (IDE_IMPLY(drives[0].present && drives[1].present,
+			IDE_IMPLY(QD_TIMREG(drives) == QD_TIMREG(drives+1),
+			          QD_TIMING(drives) == QD_TIMING(drives+1))));
+	/* if same timing register, must be same timing */
+}
+
+/*
+ * qd_set_timing:
+ *
+ * records the timing, and enables selectproc as needed
+ */
+
+static void qd_set_timing (ide_drive_t *drive, byte timing)
+{
+	ide_hwif_t *hwif = HWIF(drive);
+
+	drive->drive_data &= 0xff00;
+	drive->drive_data |= timing;
+	if (qd_timing_ok(hwif->drives)) {
+		qd_select(drive); /* selects once */
+		hwif->selectproc = NULL;
+	} else
+		hwif->selectproc = &qd_select;
+
+	printk(KERN_DEBUG "%s: %#x\n",drive->name,timing);
+}
+
+/*
+ * qd6500_tune_drive
+ */
+
+static void qd6500_tune_drive (ide_drive_t *drive, byte pio)
+{
+	int active_time   = 175;
+	int recovery_time = 415; /* worst case values from the dos driver */
+
+	if (drive->id && !qd_find_disk_type(drive,&active_time,&recovery_time)
+		&& drive->id->tPIO && (drive->id->field_valid & 0x02)
+		&& drive->id->eide_pio >= 240) {
+
+		printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
+				drive->id->tPIO);
+		active_time = 110;
+		recovery_time = drive->id->eide_pio - 120;
+	}
+
+	qd_set_timing(drive,qd6500_compute_timing(HWIF(drive),active_time,recovery_time));
+}
+
+/*
+ * qd6580_tune_drive
+ */
+
+static void qd6580_tune_drive (ide_drive_t *drive, byte pio)
+{
+	ide_pio_data_t d;
+	int base = HWIF(drive)->select_data;
+	int active_time   = 175;
+	int recovery_time = 415; /* worst case values from the dos driver */
+
+	if (drive->id && !qd_find_disk_type(drive,&active_time,&recovery_time)) {
+		pio = ide_get_best_pio_mode(drive, pio, 255, &d);
+		pio = IDE_MIN(pio,4);
+
+		switch (pio) {
+			case 0: break;
+			case 3:
+				if (d.cycle_time >= 110) {
+					active_time = 86;
+					recovery_time = d.cycle_time-102;
+				} else
+					printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
+				break;
+			case 4:
+				if (d.cycle_time >= 69) {
+					active_time = 70;
+					recovery_time = d.cycle_time-61;
+				} else
+					printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
+				break;
+			default:
+				if (d.cycle_time >= 180) {
+					active_time = 110;
+					recovery_time = d.cycle_time - 120;
+				} else {
+					active_time = ide_pio_timings[pio].active_time;
+					recovery_time = d.cycle_time
+							-active_time;
+				}
+		}
+		printk(KERN_INFO "%s: PIO mode%d\n",drive->name,pio);
+	}
+
+	if (!HWIF(drive)->channel && drive->media != ide_disk) {
+		qd_write_reg(0x5f,QD_CONTROL_PORT);
+		printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO and post-write buffer on %s.\n",drive->name,HWIF(drive)->name);
+	}
+
+	qd_set_timing(drive,qd6580_compute_timing(active_time,recovery_time));
+}
+
+/*
+ * qd_testreg
+ *
+ * tests if the given port is a register
+ */
+
+static int __init qd_testreg(int port)
+{
+	byte savereg;
+	byte readreg;
+	unsigned long flags;
+
+	save_flags(flags);	/* all CPUs */
+	cli();			/* all CPUs */
+	savereg = inb_p(port);
+	outb_p(QD_TESTVAL,port);	/* safe value */
+	readreg = inb_p(port);
+	outb(savereg,port);
+	restore_flags(flags);	/* all CPUs */
+
+	if (savereg == QD_TESTVAL) {
+		printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
+		printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
+		printk(KERN_ERR "Assuming qd65xx is not present.\n");
+		return 1;
+	}
+
+	return (readreg != QD_TESTVAL);
+}
+
+/*
+ * probe:
+ *
+ * looks at the specified baseport, and if qd found, registers & initialises it
+ * return 1 if another qd may be probed
+ */
+
+int __init probe (int base)
+{
+	byte config;
+	byte index;
+
+	config = qd_read_reg(QD_CONFIG_PORT);
+
+	if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) ) return 1;
+
+	index = ! (config & QD_CONFIG_IDE_BASEPORT);
+
+	if ((config & 0xf0) == QD_CONFIG_QD6500) {
+		ide_hwif_t *hwif = &ide_hwifs[index];
+
+		if (qd_testreg(base)) return 1;		/* bad register */
+
+			/* qd6500 found */
+
+		printk(KERN_NOTICE "%s: qd6500 at %#x\n",
+			ide_hwifs[index].name, base);
+		
+		printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
+			config, QD_ID3);
+		
+		if (config & QD_CONFIG_DISABLED) {
+			printk(KERN_WARNING "qd6500 is disabled !\n");
+			return 1;
+		}
+
+		hwif->chipset = ide_qd65xx;
+		hwif->select_data = base;
+		hwif->config_data = config;
+		hwif->drives[0].drive_data =
+		hwif->drives[1].drive_data = QD6500_DEF_DATA;
+		hwif->drives[0].io_32bit =
+		hwif->drives[1].io_32bit = 1;
+		hwif->tuneproc = &qd6500_tune_drive;
+		return 1;
+	}
+
+	if (((config & 0xf0) == QD_CONFIG_QD6580_A) || ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
+
+		byte control;
+
+		if (qd_testreg(base) || qd_testreg(base+0x02)) return 1;
+			/* bad registers */
+
+			/* qd6580 found */
+
+		control = qd_read_reg(QD_CONTROL_PORT);
+
+		printk(KERN_NOTICE "qd6580 at %#x\n", base);
+		printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
+			config, control, QD_ID3);
+
+		if (control & QD_CONTR_SEC_DISABLED) {
+			ide_hwif_t *hwif = &ide_hwifs[index];
+
+			/* secondary disabled */
+			printk(KERN_INFO "%s: qd6580: single IDE board\n",
+					ide_hwifs[index].name);
+
+			hwif->chipset = ide_qd65xx;
+			hwif->select_data = base;
+			hwif->config_data = config | (control <<8);
+			hwif->drives[0].drive_data =
+			hwif->drives[1].drive_data = QD6580_DEF_DATA;
+			hwif->drives[0].io_32bit =
+			hwif->drives[1].io_32bit = 1;
+			hwif->tuneproc = &qd6580_tune_drive;
+
+			qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
+
+			return 1;
+		} else {
+			int i,j;
+			/* secondary enabled */
+			printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n",
+					ide_hwifs[0].name,ide_hwifs[1].name);
+
+			for (i=0;i<2;i++) {
+
+				ide_hwifs[i].chipset = ide_qd65xx;
+				ide_hwifs[i].mate = &ide_hwifs[i^1];
+				ide_hwifs[i].channel = i;
+
+				ide_hwifs[i].select_data = base;
+				ide_hwifs[i].config_data = config | (control <<8);
+				ide_hwifs[i].tuneproc = &qd6580_tune_drive;
+
+				for (j=0;j<2;j++) {
+					ide_hwifs[i].drives[j].drive_data = QD6580_DEF_DATA;
+					ide_hwifs[i].drives[j].io_32bit = 1;
+				}
+			}
+
+			qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
+
+			return 0; /* no other qd65xx possible */
+		}
+	}
+	/* no qd65xx found */
+	return 1;
+}
+
+/*
+ * init_qd65xx:
+ *
+ * called at the very beginning of initialization ; should just probe and link
+ */
+
+void __init init_qd65xx (void)
+{
+	if (probe(0x30)) probe(0xb0);
+}