diff options
Diffstat (limited to 'drivers/ide/ht6560b.c')
| -rw-r--r-- | drivers/ide/ht6560b.c | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/drivers/ide/ht6560b.c b/drivers/ide/ht6560b.c deleted file mode 100644 index 743bc3693ac8..000000000000 --- a/drivers/ide/ht6560b.c +++ /dev/null @@ -1,383 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (C) 1995-2000 Linus Torvalds & author (see below) - */ - -/* - * 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 <j.e.van.grootheest@caiway.nl> - * - */ - -#define DRV_NAME "ht6560b" -#define HT6560B_VERSION "v0.08" - -#include <linux/module.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/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 - -static inline u8 HT_CONFIG(ide_drive_t *drive) -{ - return ((unsigned long)ide_get_drivedata(drive) & 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 Select register 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. - */ -static inline u8 HT_TIMING(ide_drive_t *drive) -{ - return (unsigned long)ide_get_drivedata(drive) & 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_dev_select(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - 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); - - /* - * Need to enforce prefetch sometimes because otherwise - * it'll hang (hard). - */ - if (drive->media != ide_disk || - (drive->dev_flags & IDE_DFLAG_PRESENT) == 0) - select |= HT_PREFETCH_MODE; - - if (select != current_select || timing != current_timing) { - current_select = select; - current_timing = timing; - (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); - /* - * Set timing for this drive: - */ - outb(timing, hwif->io_ports.device_addr); - (void)inb(hwif->io_ports.status_addr); -#ifdef DEBUG - printk("ht6560b: %s: select=%#x timing=%#x\n", - drive->name, select, timing); -#endif - } - local_irq_restore(flags); - - outb(drive->select | ATA_DEVICE_OBS, hwif->io_ports.device_addr); -} - -/* - * 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); /* Select register */ - (void)inb(0x1f7); /* Status register */ - - printk("ht6560b " HT6560B_VERSION - ": chipset detected and initialized" -#ifdef DEBUG - " with debug enabled" -#endif - "\n" - ); - return 1; -} - -static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio) -{ - int active_time, recovery_time; - int active_cycles, recovery_cycles; - int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50; - - if (pio) { - unsigned int cycle_time; - struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio); - - cycle_time = ide_pio_cycle_time(drive, pio); - - /* - * Just like opti621.c we try to calculate the - * actual cycle time for recovery and activity - * according system bus speed. - */ - active_time = t->active; - recovery_time = cycle_time - active_time - t->setup; - /* - * 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 */ - } -} - -static DEFINE_SPINLOCK(ht6560b_lock); - -/* - * Enable/Disable so called prefetch mode - */ -static void ht_set_prefetch(ide_drive_t *drive, u8 state) -{ - unsigned long flags, config; - int t = HT_PREFETCH_MODE << 8; - - spin_lock_irqsave(&ht6560b_lock, flags); - - config = (unsigned long)ide_get_drivedata(drive); - - /* - * Prefetch mode and unmask irq seems to conflict - */ - if (state) { - config |= t; /* enable prefetch mode */ - drive->dev_flags |= IDE_DFLAG_NO_UNMASK; - drive->dev_flags &= ~IDE_DFLAG_UNMASK; - } else { - config &= ~t; /* disable prefetch mode */ - drive->dev_flags &= ~IDE_DFLAG_NO_UNMASK; - } - - ide_set_drivedata(drive, (void *)config); - - spin_unlock_irqrestore(&ht6560b_lock, flags); - -#ifdef DEBUG - printk("ht6560b: drive %s prefetch mode %sabled\n", drive->name, (state ? "en" : "dis")); -#endif -} - -static void ht6560b_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) -{ - unsigned long flags, config; - const u8 pio = drive->pio_mode - XFER_PIO_0; - 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(&ht6560b_lock, flags); - config = (unsigned long)ide_get_drivedata(drive); - config &= 0xff00; - config |= timing; - ide_set_drivedata(drive, (void *)config); - spin_unlock_irqrestore(&ht6560b_lock, flags); - -#ifdef DEBUG - printk("ht6560b: drive %s tuned to pio mode %#x timing=%#x\n", drive->name, pio, timing); -#endif -} - -static void __init ht6560b_init_dev(ide_drive_t *drive) -{ - ide_hwif_t *hwif = drive->hwif; - /* Setting default configurations for drives. */ - unsigned long t = (HT_CONFIG_DEFAULT << 8) | HT_TIMING_DEFAULT; - - if (hwif->channel) - t |= (HT_SECONDARY_IF << 8); - - ide_set_drivedata(drive, (void *)t); -} - -static bool probe_ht6560b; - -module_param_named(probe, probe_ht6560b, bool, 0); -MODULE_PARM_DESC(probe, "probe for HT6560B chipset"); - -static const struct ide_tp_ops ht6560b_tp_ops = { - .exec_command = ide_exec_command, - .read_status = ide_read_status, - .read_altstatus = ide_read_altstatus, - .write_devctl = ide_write_devctl, - - .dev_select = ht6560b_dev_select, - .tf_load = ide_tf_load, - .tf_read = ide_tf_read, - - .input_data = ide_input_data, - .output_data = ide_output_data, -}; - -static const struct ide_port_ops ht6560b_port_ops = { - .init_dev = ht6560b_init_dev, - .set_pio_mode = ht6560b_set_pio_mode, -}; - -static const struct ide_port_info ht6560b_port_info __initconst = { - .name = DRV_NAME, - .chipset = ide_ht6560b, - .tp_ops = &ht6560b_tp_ops, - .port_ops = &ht6560b_port_ops, - .host_flags = IDE_HFLAG_SERIALIZE | /* is this needed? */ - IDE_HFLAG_NO_DMA | - IDE_HFLAG_ABUSE_PREFETCH, - .pio_mask = ATA_PIO4, -}; - -static int __init ht6560b_init(void) -{ - if (probe_ht6560b == 0) - return -ENODEV; - - if (!request_region(HT_CONFIG_PORT, 1, DRV_NAME)) { - printk(KERN_NOTICE "%s: HT_CONFIG_PORT not found\n", - __func__); - return -ENODEV; - } - - if (!try_to_init_ht6560b()) { - printk(KERN_NOTICE "%s: HBA not found\n", __func__); - goto release_region; - } - - return ide_legacy_device_add(&ht6560b_port_info, 0); - -release_region: - release_region(HT_CONFIG_PORT, 1); - return -ENODEV; -} - -module_init(ht6560b_init); - -MODULE_AUTHOR("See Local File"); -MODULE_DESCRIPTION("HT-6560B EIDE-controller support"); -MODULE_LICENSE("GPL"); |