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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [legacy/] [ht6560b.c] - Rev 1275
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/* * 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> #ifdef CONFIG_BLK_DEV_HT6560B_MODULE # define _IDE_C # include "ide_modes.h" # undef _IDE_C #else # include "ide_modes.h" #endif /* CONFIG_BLK_DEV_HT6560B_MODULE */ /* #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(&io_request_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(&io_request_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(&io_request_lock, flags); drive->drive_data &= 0xff00; drive->drive_data |= timing; spin_unlock_irqrestore(&io_request_lock, flags); #ifdef DEBUG printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing); #endif } void __init probe_ht6560b (void) { int t; 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; /* 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; #ifndef HWIF_PROBE_CLASSIC_METHOD probe_hwif_init(&ide_hwifs[0]); probe_hwif_init(&ide_hwifs[1]); #endif /* HWIF_PROBE_CLASSIC_METHOD */ } void __init ht6560b_release (void) { if (ide_hwifs[0].chipset != ide_ht6560b && ide_hwifs[1].chipset != ide_ht6560b) return; ide_hwifs[0].chipset = ide_unknown; ide_hwifs[1].chipset = ide_unknown; ide_hwifs[0].tuneproc = NULL; ide_hwifs[1].tuneproc = NULL; ide_hwifs[0].selectproc = NULL; ide_hwifs[1].selectproc = NULL; ide_hwifs[0].serialized = 0; ide_hwifs[1].serialized = 0; ide_hwifs[0].mate = NULL; ide_hwifs[1].mate = NULL; ide_hwifs[0].drives[0].drive_data = 0; ide_hwifs[0].drives[1].drive_data = 0; ide_hwifs[1].drives[0].drive_data = 0; ide_hwifs[1].drives[1].drive_data = 0; release_region(HT_CONFIG_PORT, 1); } #ifndef MODULE /* * init_ht6560b: * * called by ide.c when parsing command line */ void __init init_ht6560b (void) { if (check_region(HT_CONFIG_PORT,1)) { printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n", __FUNCTION__); return; } if (!try_to_init_ht6560b()) { printk(KERN_NOTICE "%s: HBA not found\n", __FUNCTION__); return; } probe_ht6560b(); } #else MODULE_AUTHOR("See Local File"); MODULE_DESCRIPTION("HT-6560B EIDE-controller support"); MODULE_LICENSE("GPL"); int __init ht6560b_mod_init(void) { if (check_region(HT_CONFIG_PORT,1)) { 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__); return -ENODEV; } probe_ht6560b(); if (ide_hwifs[0].chipset != ide_ht6560b && ide_hwifs[1].chipset != ide_ht6560b) { ht6560b_release(); return -ENODEV; } return 0; } module_init(ht6560b_mod_init); void __init ht6560b_mod_exit(void) { ht6560b_release(); } module_exit(ht6560b_mod_exit); #endif
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