Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 370 insertions, 0 deletions

diff --git a/drivers/ide/legacy/ht6560b.c b/drivers/ide/legacy/ht6560b.c
new file mode 100644
index 000000000000..a77fb249d5cf
--- /dev/null
+++ b/drivers/ide/legacy/ht6560b.c
@@ -0,0 +1,370 @@
+/*
+ *  linux/drivers/ide/legacy/ht6560b.c          Version 0.07    Feb  1, 2000
+ *
+ *  Copyright (C) 1995-2000  Linus Torvalds & author (see below)
+ */
+
+/*
+ *
+ *  Version 0.01        Initial version hacked out of ide.c
+ *
+ *  Version 0.02        Added support for PIO modes, auto-tune
+ *
+ *  Version 0.03        Some cleanups
+ *
+ *  Version 0.05        PIO mode cycle timings auto-tune using bus-speed
+ *
+ *  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.
+ *
+ *  Version 0.07        Trying to fix CD-ROM detection problem.
+ *                      "Prefetch" mode bit OFF for ide disks and
+ *                      ON for anything else.
+ *
+ *
+ *  HT-6560B EIDE-controller support
+ *  To activate controller support use kernel parameter "ide0=ht6560b".
+ *  Use hdparm utility to enable PIO mode support.
+ *
+ *  Author:    Mikko Ala-Fossi            <maf@iki.fi>
+ *             Jan Evert van Grootheest   <janevert@iae.nl>
+ *
+ *  Try:  http://www.maf.iki.fi/~maf/ht6560b/
+ */
+
+#define HT6560B_VERSION "v0.07"
+
+#undef REALLY_SLOW_IO           /* most systems can safely undef this */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#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>
+
+/* #define DEBUG */  /* remove comments for DEBUG messages */
+
+/*
+ * 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_CONFIG_PORT    0x3e6
+#define HT_CONFIG(drivea) (u8)(((drivea)->drive_data & 0xff00) >> 8)
+/*
+ * FIFO + PREFETCH (both a/b-model)
+ */
+#define HT_CONFIG_DEFAULT 0x1c /* no prefetch */
+/* #define HT_CONFIG_DEFAULT 0x3c */ /* with prefetch */
+#define HT_SECONDARY_IF   0x01
+#define HT_PREFETCH_MODE  0x20
+
+/*
+ * 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 Cycle Time  (rt)
+ *           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.
+ */
+#define HT_TIMING(drivea) (u8)((drivea)->drive_data & 0x00ff)
+#define HT_TIMING_DEFAULT 0xff
+
+/*
+ * 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)
+{
+        unsigned long flags;
+        static u8 current_select = 0;
+        static u8 current_timing = 0;
+        u8 select, timing;
+        
+        local_irq_save(flags);
+        
+        select = HT_CONFIG(drive);
+        timing = HT_TIMING(drive);
+        
+        if (select != current_select || timing != current_timing) {
+                current_select = select;
+                current_timing = timing;
+                if (drive->media != ide_disk || !drive->present)
+                        select |= HT_PREFETCH_MODE;
+                (void) HWIF(drive)->INB(HT_CONFIG_PORT);
+                (void) HWIF(drive)->INB(HT_CONFIG_PORT);
+                (void) HWIF(drive)->INB(HT_CONFIG_PORT);
+                (void) HWIF(drive)->INB(HT_CONFIG_PORT);
+                HWIF(drive)->OUTB(select, HT_CONFIG_PORT);
+                /*
+                 * Set timing for this drive:
+                 */
+                HWIF(drive)->OUTB(timing, IDE_SELECT_REG);
+                (void) HWIF(drive)->INB(IDE_STATUS_REG);
+#ifdef DEBUG
+                printk("ht6560b: %s: select=%#x timing=%#x\n",
+                        drive->name, select, timing);
+#endif
+        }
+        local_irq_restore(flags);
+}
+
+/*
+ * Autodetection and initialization of ht6560b
+ */
+static int __init try_to_init_ht6560b(void)
+{
+        u8 orig_value;
+        int i;
+        
+        /* Autodetect ht6560b */
+        if ((orig_value = inb(HT_CONFIG_PORT)) == 0xff)
+                return 0;
+        
+        for (i=3;i>0;i--) {
+                outb(0x00, HT_CONFIG_PORT);
+                if (!( (~inb(HT_CONFIG_PORT)) & 0x3f )) {
+                        outb(orig_value, HT_CONFIG_PORT);
+                        return 0;
+                }
+        }
+        outb(0x00, HT_CONFIG_PORT);
+        if ((~inb(HT_CONFIG_PORT))& 0x3f) {
+                outb(orig_value, HT_CONFIG_PORT);
+                return 0;
+        }
+        /*
+         * Ht6560b autodetected
+         */
+        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 u8 ht_pio2timings(ide_drive_t *drive, u8 pio)
+{
+        int active_time, recovery_time;
+        int active_cycles, recovery_cycles;
+        ide_pio_data_t d;
+        int bus_speed = system_bus_clock();
+        
+        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.
+                 */
+                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 (u8)((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, u8 state)
+{
+        unsigned long flags;
+        int t = HT_PREFETCH_MODE << 8;
+        
+        spin_lock_irqsave(&ide_lock, flags);
+        
+        /*
+         *  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;
+        }
+        
+        spin_unlock_irqrestore(&ide_lock, flags);
+        
+#ifdef DEBUG
+        printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis"));
+#endif
+}
+
+static void tune_ht6560b (ide_drive_t *drive, u8 pio)
+{
+        unsigned long flags;
+        u8 timing;
+        
+        switch (pio) {
+        case 8:         /* set prefetch off */
+        case 9:         /* set prefetch on */
+                ht_set_prefetch(drive, pio & 1);
+                return;
+        }
+        
+        timing = ht_pio2timings(drive, pio);
+        
+        spin_lock_irqsave(&ide_lock, flags);
+        
+        drive->drive_data &= 0xff00;
+        drive->drive_data |= timing;
+        
+        spin_unlock_irqrestore(&ide_lock, flags);
+        
+#ifdef DEBUG
+        printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing);
+#endif
+}
+
+/* Can be called directly from ide.c. */
+int __init ht6560b_init(void)
+{
+        ide_hwif_t *hwif, *mate;
+        int t;
+
+        hwif = &ide_hwifs[0];
+        mate = &ide_hwifs[1];
+
+        if (!request_region(HT_CONFIG_PORT, 1, hwif->name)) {
+                printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n",
+                        __FUNCTION__);
+                return -ENODEV;
+        }
+
+        if (!try_to_init_ht6560b()) {
+                printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__);
+                goto release_region;
+        }
+
+        hwif->chipset = ide_ht6560b;
+        hwif->selectproc = &ht6560b_selectproc;
+        hwif->tuneproc = &tune_ht6560b;
+        hwif->serialized = 1;   /* is this needed? */
+        hwif->mate = mate;
+
+        mate->chipset = ide_ht6560b;
+        mate->selectproc = &ht6560b_selectproc;
+        mate->tuneproc = &tune_ht6560b;
+        mate->serialized = 1;   /* is this needed? */
+        mate->mate = hwif;
+        mate->channel = 1;
+
+        /*
+         * Setting default configurations for drives
+         */
+        t = (HT_CONFIG_DEFAULT << 8);
+        t |= HT_TIMING_DEFAULT;
+        hwif->drives[0].drive_data = t;
+        hwif->drives[1].drive_data = t;
+
+        t |= (HT_SECONDARY_IF << 8);
+        mate->drives[0].drive_data = t;
+        mate->drives[1].drive_data = t;
+
+        probe_hwif_init(hwif);
+        probe_hwif_init(mate);
+
+        create_proc_ide_interfaces();
+
+        return 0;
+
+release_region:
+        release_region(HT_CONFIG_PORT, 1);
+        return -ENODEV;
+}
+
+#ifdef MODULE
+module_init(ht6560b_init);
+#endif
+
+MODULE_AUTHOR("See Local File");
+MODULE_DESCRIPTION("HT-6560B EIDE-controller support");
+MODULE_LICENSE("GPL");