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-rw-r--r--drivers/block/ht6560b.c359
1 files changed, 232 insertions, 127 deletions
diff --git a/drivers/block/ht6560b.c b/drivers/block/ht6560b.c
index d9fb885c2..6b7d5af72 100644
--- a/drivers/block/ht6560b.c
+++ b/drivers/block/ht6560b.c
@@ -1,7 +1,7 @@
/*
- * linux/drivers/block/ht6580.c Version 0.04 Mar 19, 1996
+ * linux/drivers/block/ht6560b.c Version 0.07 Feb 1, 2000
*
- * Copyright (C) 1995-1996 Linus Torvalds & author (see below)
+ * Copyright (C) 1995-2000 Linus Torvalds & author (see below)
*/
/*
@@ -12,42 +12,31 @@
*
* Version 0.03 Some cleanups
*
- * I reviewed some assembler source listings of htide drivers and found
- * out how they setup those cycle time interfacing values, as they at Holtek
- * call them. IDESETUP.COM that is supplied with the drivers figures out
- * optimal values and fetches those values to drivers. I found out that
- * they use IDE_SELECT_REG to fetch timings to the ide board right after
- * interface switching. After that it was quite easy to add code to
- * ht6560b.c.
+ * Version 0.05 PIO mode cycle timings auto-tune using bus-speed
*
- * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine
- * for hda and hdc. But hdb needed higher values to work, so I guess
- * that sometimes it is necessary to give higher value than IDESETUP
- * gives. [see cmd640.c for an extreme example of this. -ml]
+ * Version 0.06 Prefetch mode now defaults no OFF. To set
+ * prefetch mode OFF/ON use "hdparm -p8/-p9".
+ * Unmask irq is disabled when prefetch mode
+ * is enabled.
*
- * Perhaps I should explain something about these timing values:
- * The higher nibble of value is the Recovery Time (rt) and the lower nibble
- * of the value is the Active Time (at). Minimum value 2 is the fastest and
- * the maximum value 15 is the slowest. Default values should be 15 for both.
- * So 0x24 means 2 for rt and 4 for at. Each of the drives should have
- * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or
- * similar. If value is too small there will be all sorts of failures.
- *
- * Port 0x3e6 bit 0x20 sets these timings on/off. If 0x20 bit is set
- * these timings are disabled.
+ * Version 0.07 Trying to fix CD-ROM detection problem.
+ * "Prefetch" mode bit OFF for ide disks and
+ * ON for anything else.
*
- * Mikko Ala-Fossi
*
- * More notes:
+ * HT-6560B EIDE-controller support
+ * To activate controller support use kernel parameter "ide0=ht6560b".
+ * Use hdparm utility to enable PIO mode support.
*
- * There's something still missing from the initialization code, though.
- * If I have booted to dos sometime after power on, I can get smaller
- * timing values working. Perhaps I could soft-ice the initialization.
+ * Author: Mikko Ala-Fossi <maf@iki.fi>
+ * Jan Evert van Grootheest <janevert@iae.nl>
*
- * -=- malafoss@snakemail.hut.fi -=- searching the marvels of universe -=-
+ * Try: http://www.maf.iki.fi/~maf/ht6560b/
*/
-#undef REALLY_SLOW_IO /* most systems can safely undef this */
+#define HT6560B_VERSION "v0.07"
+
+#undef REALLY_SLOW_IO /* most systems can safely undef this */
#include <linux/types.h>
#include <linux/kernel.h>
@@ -63,175 +52,291 @@
#include "ide_modes.h"
-/*
- * This routine handles interface switching for the peculiar hardware design
- * on the F.G.I./Holtek HT-6560B VLB IDE interface.
- * The HT-6560B can only enable one IDE port at a time, and requires a
- * silly sequence (below) whenever we switch between primary and secondary.
- *
- * This stuff is courtesy of malafoss@snakemail.hut.fi
- * (or maf@nemesis.tky.hut.fi)
- *
- * At least one user has reported that this code can confuse the floppy
- * controller and/or driver -- perhaps this should be changed to use
- * a read-modify-write sequence, so as not to disturb other bits in the reg?
- */
+/* #define DEBUG */ /* remove comments for DEBUG messages */
/*
- * The special i/o-port that HT-6560B uses to select interfaces:
+ * The special i/o-port that HT-6560B uses to configuration:
+ * bit0 (0x01): "1" selects secondary interface
+ * bit2 (0x04): "1" enables FIFO function
+ * bit5 (0x20): "1" enables prefetched data read function (???)
+ *
+ * The special i/o-port that HT-6560A uses to configuration:
+ * bit0 (0x01): "1" selects secondary interface
+ * bit1 (0x02): "1" enables prefetched data read function
+ * bit2 (0x04): "0" enables multi-master system (?)
+ * bit3 (0x08): "1" 3 cycle time, "0" 2 cycle time (?)
*/
-#define HT_SELECT_PORT 0x3e6
-
+#define HT_CONFIG_PORT 0x3e6
+#define HT_CONFIG(drivea) (byte)(((drivea)->drive_data & 0xff00) >> 8)
/*
- * We don't know what all of the bits are for, but we *do* know about these:
- * bit5 (0x20): "1" selects slower speed by disabling use of timing values
- * bit0 (0x01): "1" selects second interface
+ * FIFO + PREFETCH (both a/b-model)
*/
-static byte ht6560b_selects [2][MAX_DRIVES] = {{0x3c,0x3c}, {0x3d,0x3d}};
+#define HT_CONFIG_DEFAULT 0x1c /* no prefetch */
+/* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */
+#define HT_SECONDARY_IF 0x01
+#define HT_PREFETCH_MODE 0x20
/*
- * VLB ht6560b Timing values:
+ * ht6560b Timing values:
+ *
+ * I reviewed some assembler source listings of htide drivers and found
+ * out how they setup those cycle time interfacing values, as they at Holtek
+ * call them. IDESETUP.COM that is supplied with the drivers figures out
+ * optimal values and fetches those values to drivers. I found out that
+ * they use IDE_SELECT_REG to fetch timings to the ide board right after
+ * interface switching. After that it was quite easy to add code to
+ * ht6560b.c.
+ *
+ * IDESETUP.COM gave me values 0x24, 0x45, 0xaa, 0xff that worked fine
+ * for hda and hdc. But hdb needed higher values to work, so I guess
+ * that sometimes it is necessary to give higher value than IDESETUP
+ * gives. [see cmd640.c for an extreme example of this. -ml]
+ *
+ * Perhaps I should explain something about these timing values:
+ * The higher nibble of value is the Recovery Time (rt) and the lower nibble
+ * of the value is the Active Time (at). Minimum value 2 is the fastest and
+ * the maximum value 15 is the slowest. Default values should be 15 for both.
+ * So 0x24 means 2 for rt and 4 for at. Each of the drives should have
+ * both values, and IDESETUP gives automatically rt=15 st=15 for CDROMs or
+ * similar. If value is too small there will be all sorts of failures.
*
* Timing byte consists of
- * High nibble: Recovery Time (rt)
- * The valid values range from 2 to 15. The default is 15.
+ * High nibble: Recovery Cycle Time (rt)
+ * The valid values range from 2 to 15. The default is 15.
*
- * Low nibble: Active Time (at)
- * The valid values range from 2 to 15. The default is 15.
+ * Low nibble: Active Cycle Time (at)
+ * The valid values range from 2 to 15. The default is 15.
*
* You can obtain optimized timing values by running Holtek IDESETUP.COM
* for DOS. DOS drivers get their timing values from command line, where
* the first value is the Recovery Time and the second value is the
* Active Time for each drive. Smaller value gives higher speed.
* In case of failures you should probably fall back to a higher value.
- *
- * Here's an example to make it clearer:
- *
- * DOS: DEVICE=C:\bin\HTIDE\HTIDE.SYS /D0=2,4 /D1=4,5 /D2=10,10 /D3=15,15
- * Linux: byte ht6560b_timings [][] = {{0x24, 0x45}, {0xaa, 0xff}};
- *
- * Note: There are no ioctls to change these values directly,
- * but settings can be approximated as PIO modes, using "hdparm":
- *
- * rc.local: hdparm -p3 /dev/hda -p2 /dev/hdb -p1 /dev/hdc -p0 /dev/hdd
*/
+#define HT_TIMING(drivea) (byte)((drivea)->drive_data & 0x00ff)
+#define HT_TIMING_DEFAULT 0xff
-static byte ht6560b_timings [2][MAX_DRIVES] = {{0xff,0xff}, {0xff,0xff}};
-
-static byte pio_to_timings[6] = {0xff, 0xaa, 0x45, 0x24, 0x13, 0x12};
+/*
+ * This routine handles interface switching for the peculiar hardware design
+ * on the F.G.I./Holtek HT-6560B VLB IDE interface.
+ * The HT-6560B can only enable one IDE port at a time, and requires a
+ * silly sequence (below) whenever we switch between primary and secondary.
+ */
/*
* This routine is invoked from ide.c to prepare for access to a given drive.
*/
static void ht6560b_selectproc (ide_drive_t *drive)
{
- byte t;
unsigned long flags;
static byte current_select = 0;
static byte current_timing = 0;
- byte select = ht6560b_selects[HWIF(drive)->index][drive->select.b.unit];
- byte timing = ht6560b_timings[HWIF(drive)->index][drive->select.b.unit];
-
+ byte select, timing;
+
+ __save_flags (flags); /* local CPU only */
+ __cli(); /* local CPU only */
+
+ select = HT_CONFIG(drive);
+ timing = HT_TIMING(drive);
+
if (select != current_select || timing != current_timing) {
current_select = select;
current_timing = timing;
- __save_flags (flags); /* local CPU only */
- __cli(); /* local CPU only */
- (void) inb(HT_SELECT_PORT);
- (void) inb(HT_SELECT_PORT);
- (void) inb(HT_SELECT_PORT);
+ if (drive->media != ide_disk || !drive->present)
+ select |= HT_PREFETCH_MODE;
+ (void) inb(HT_CONFIG_PORT);
+ (void) inb(HT_CONFIG_PORT);
+ (void) inb(HT_CONFIG_PORT);
+ (void) inb(HT_CONFIG_PORT);
+ outb(select, HT_CONFIG_PORT);
/*
- * Note: input bits are reversed to output bits!!
+ * Set timing for this drive:
*/
- t = inb(HT_SELECT_PORT) ^ 0x3f;
- t &= (~0x21);
- t |= (current_select & 0x21);
- outb(t, HT_SELECT_PORT);
- /*
- * Set timing for this drive:
- */
- outb (timing, IDE_SELECT_REG);
- (void) inb (IDE_STATUS_REG);
- __restore_flags (flags); /* local CPU only */
+ outb(timing, IDE_SELECT_REG);
+ (void) inb(IDE_STATUS_REG);
#ifdef DEBUG
- printk("ht6560b: %s: select=%#x timing=%#x\n", drive->name, t, timing);
+ printk("ht6560b: %s: select=%#x timing=%#x\n", drive->name, select, timing);
#endif
}
+ __restore_flags (flags); /* local CPU only */
}
/*
* Autodetection and initialization of ht6560b
*/
-int try_to_init_ht6560b(void)
+static int __init try_to_init_ht6560b(void)
{
byte orig_value;
int i;
-
+
/* Autodetect ht6560b */
- if ((orig_value=inb(HT_SELECT_PORT)) == 0xff)
+ if ((orig_value=inb(HT_CONFIG_PORT)) == 0xff)
return 0;
-
+
for (i=3;i>0;i--) {
- outb(0x00, HT_SELECT_PORT);
- if (!( (~inb(HT_SELECT_PORT)) & 0x3f )) {
- outb(orig_value, HT_SELECT_PORT);
- return 0;
+ outb(0x00, HT_CONFIG_PORT);
+ if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) {
+ outb(orig_value, HT_CONFIG_PORT);
+ return 0;
}
}
- outb(0x00, HT_SELECT_PORT);
- if ((~inb(HT_SELECT_PORT))& 0x3f) {
- outb(orig_value, HT_SELECT_PORT);
+ outb(0x00, HT_CONFIG_PORT);
+ if ((~inb(HT_CONFIG_PORT))& 0x3f) {
+ outb(orig_value, HT_CONFIG_PORT);
return 0;
}
/*
- * Ht6560b autodetected:
- * reverse input bits to output bits
- * initialize bit1 to 0
+ * Ht6560b autodetected
*/
- outb((orig_value ^ 0x3f) & 0xfd, HT_SELECT_PORT);
-
- printk("\nht6560b: detected and initialized");
+ outb(HT_CONFIG_DEFAULT, HT_CONFIG_PORT);
+ outb(HT_TIMING_DEFAULT, 0x1f6); /* IDE_SELECT_REG */
+ (void) inb(0x1f7); /* IDE_STATUS_REG */
+
+ printk("\nht6560b " HT6560B_VERSION
+ ": chipset detected and initialized"
+#ifdef DEBUG
+ " with debug enabled"
+#endif
+ );
return 1;
}
-static void tune_ht6560b (ide_drive_t *drive, byte pio)
+static byte ht_pio2timings(ide_drive_t *drive, byte pio)
{
- unsigned int hwif, unit;
+ int bus_speed, active_time, recovery_time;
+ int active_cycles, recovery_cycles;
+ ide_pio_data_t d;
+
+ if (pio) {
+ pio = ide_get_best_pio_mode(drive, pio, 5, &d);
+
+ /*
+ * Just like opti621.c we try to calculate the
+ * actual cycle time for recovery and activity
+ * according system bus speed.
+ */
+ bus_speed = ide_system_bus_speed();
+ active_time = ide_pio_timings[pio].active_time;
+ recovery_time = d.cycle_time
+ - active_time
+ - ide_pio_timings[pio].setup_time;
+ /*
+ * Cycle times should be Vesa bus cycles
+ */
+ active_cycles = (active_time * bus_speed + 999) / 1000;
+ recovery_cycles = (recovery_time * bus_speed + 999) / 1000;
+ /*
+ * Upper and lower limits
+ */
+ if (active_cycles < 2) active_cycles = 2;
+ if (recovery_cycles < 2) recovery_cycles = 2;
+ if (active_cycles > 15) active_cycles = 15;
+ if (recovery_cycles > 15) recovery_cycles = 0; /* 0==16 */
+
+#ifdef DEBUG
+ printk("ht6560b: drive %s setting pio=%d recovery=%d (%dns) active=%d (%dns)\n", drive->name, pio, recovery_cycles, recovery_time, active_cycles, active_time);
+#endif
+
+ return (byte)((recovery_cycles << 4) | active_cycles);
+ } else {
+
+#ifdef DEBUG
+ printk("ht6560b: drive %s setting pio=0\n", drive->name);
+#endif
+
+ return HT_TIMING_DEFAULT; /* default setting */
+ }
+}
+
+/*
+ * Enable/Disable so called prefetch mode
+ */
+static void ht_set_prefetch(ide_drive_t *drive, byte state)
+{
+ unsigned long flags;
+ int t = HT_PREFETCH_MODE << 8;
+
+ save_flags (flags); /* all CPUs */
+ cli(); /* all CPUs */
+
+ /*
+ * Prefetch mode and unmask irq seems to conflict
+ */
+ if (state) {
+ drive->drive_data |= t; /* enable prefetch mode */
+ drive->no_unmask = 1;
+ drive->unmask = 0;
+ } else {
+ drive->drive_data &= ~t; /* disable prefetch mode */
+ drive->no_unmask = 0;
+ }
+
+ restore_flags (flags); /* all CPUs */
+
+#ifdef DEBUG
+ printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));
+#endif
+}
- if (pio == 255) { /* auto-tune */
- if (drive->media != ide_disk)
- pio = 0; /* some CDROMs don't like fast modes (?) */
- else
- pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
+static void tune_ht6560b (ide_drive_t *drive, byte pio)
+{
+ unsigned long flags;
+ byte timing;
+
+ switch (pio) {
+ case 8: /* set prefetch off */
+ case 9: /* set prefetch on */
+ ht_set_prefetch(drive, pio & 1);
+ return;
}
- unit = drive->select.b.unit;
- hwif = HWIF(drive)->index;
- ht6560b_timings[hwif][unit] = pio_to_timings[pio];
- if (pio == 0)
- ht6560b_selects[hwif][unit] |= 0x20;
- else
- ht6560b_selects[hwif][unit] &= ~0x20;
+
+ timing = ht_pio2timings(drive, pio);
+
+ save_flags (flags); /* all CPUs */
+ cli(); /* all CPUs */
+
+ drive->drive_data &= 0xff00;
+ drive->drive_data |= timing;
+
+ restore_flags (flags); /* all CPUs */
+
+#ifdef DEBUG
+ printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);
+#endif
}
-void init_ht6560b (void)
+void __init init_ht6560b (void)
{
- if (check_region(HT_SELECT_PORT,1)) {
- printk("\nht6560b: PORT 0x3e6 ALREADY IN USE\n");
+ int t;
+
+ if (check_region(HT_CONFIG_PORT,1)) {
+ printk(KERN_ERR "ht6560b: PORT %#x ALREADY IN USE\n", HT_CONFIG_PORT);
} else {
if (try_to_init_ht6560b()) {
- request_region(HT_SELECT_PORT, 1, ide_hwifs[0].name);
+ request_region(HT_CONFIG_PORT, 1, ide_hwifs[0].name);
ide_hwifs[0].chipset = ide_ht6560b;
ide_hwifs[1].chipset = ide_ht6560b;
ide_hwifs[0].selectproc = &ht6560b_selectproc;
ide_hwifs[1].selectproc = &ht6560b_selectproc;
ide_hwifs[0].tuneproc = &tune_ht6560b;
ide_hwifs[1].tuneproc = &tune_ht6560b;
- ide_hwifs[0].serialized = 1;
- ide_hwifs[1].serialized = 1;
+ ide_hwifs[0].serialized = 1; /* is this needed? */
+ ide_hwifs[1].serialized = 1; /* is this needed? */
ide_hwifs[0].mate = &ide_hwifs[1];
ide_hwifs[1].mate = &ide_hwifs[0];
ide_hwifs[1].channel = 1;
+
+ /*
+ * Setting default configurations for drives
+ */
+ t = (HT_CONFIG_DEFAULT << 8);
+ t |= HT_TIMING_DEFAULT;
+ ide_hwifs[0].drives[0].drive_data = t;
+ ide_hwifs[0].drives[1].drive_data = t;
+ t |= (HT_SECONDARY_IF << 8);
+ ide_hwifs[1].drives[0].drive_data = t;
+ ide_hwifs[1].drives[1].drive_data = t;
} else
- printk("\nht6560b: not found\n");
+ printk(KERN_ERR "ht6560b: not found\n");
}
}
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