+++ /dev/null
-/* -*- linux-c -*-
- * linux/drivers/ide/legacy/pdc4030.c Version 0.90 May 27, 1999
- *
- * Copyright (C) 1995-2002 Linus Torvalds & authors (see below)
- */
-
-/*
- * Principal Author/Maintainer: Peter Denison <promise@pnd-pc.demon.co.uk>
- *
- * This file provides support for the second port and cache of Promise
- * IDE interfaces, e.g. DC4030VL, DC4030VL-1 and DC4030VL-2.
- *
- * Thanks are due to Mark Lord for advice and patiently answering stupid
- * questions, and all those mugs^H^H^H^Hbrave souls who've tested this,
- * especially Andre Hedrick.
- *
- * Version 0.01 Initial version, #include'd in ide.c rather than
- * compiled separately.
- * Reads use Promise commands, writes as before. Drives
- * on second channel are read-only.
- * Version 0.02 Writes working on second channel, reads on both
- * channels. Writes fail under high load. Suspect
- * transfers of >127 sectors don't work.
- * Version 0.03 Brought into line with ide.c version 5.27.
- * Other minor changes.
- * Version 0.04 Updated for ide.c version 5.30
- * Changed initialization strategy
- * Version 0.05 Kernel integration. -ml
- * Version 0.06 Ooops. Add hwgroup to direct call of ide_intr() -ml
- * Version 0.07 Added support for DC4030 variants
- * Secondary interface autodetection
- * Version 0.08 Renamed to pdc4030.c
- * Version 0.09 Obsolete - never released - did manual write request
- * splitting before max_sectors[major][minor] available.
- * Version 0.10 Updated for 2.1 series of kernels
- * Version 0.11 Updated for 2.3 series of kernels
- * Autodetection code added.
- *
- * Version 0.90 Transition to BETA code. No lost/unexpected interrupts
- */
-
-/*
- * Once you've compiled it in, you'll have to also enable the interface
- * setup routine from the kernel command line, as in
- *
- * 'linux ide0=dc4030' or 'linux ide1=dc4030'
- *
- * It should now work as a second controller also ('ide1=dc4030') but only
- * if you DON'T have BIOS V4.44, which has a bug. If you have this version
- * and EPROM programming facilities, you need to fix 4 bytes:
- * 2496: 81 81
- * 2497: 3E 3E
- * 2498: 22 98 *
- * 2499: 06 05 *
- * 249A: F0 F0
- * 249B: 01 01
- * ...
- * 24A7: 81 81
- * 24A8: 3E 3E
- * 24A9: 22 98 *
- * 24AA: 06 05 *
- * 24AB: 70 70
- * 24AC: 01 01
- *
- * As of January 1999, Promise Technology Inc. have finally supplied me with
- * some technical information which has shed a glimmer of light on some of the
- * problems I was having, especially with writes.
- *
- * There are still potential problems with the robustness and efficiency of
- * this driver because I still don't understand what the card is doing with
- * interrupts, however, it has been stable for a while with no reports of ill
- * effects.
- */
-
-#define DEBUG_READ
-#define DEBUG_WRITE
-#define __PROMISE_4030
-
-#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>
-#include <asm/irq.h>
-
-#include "pdc4030.h"
-
-static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block);
-
-/*
- * promise_selectproc() is invoked by ide.c
- * in preparation for access to the specified drive.
- */
-static void promise_selectproc (ide_drive_t *drive)
-{
- unsigned int number;
-
- number = (HWIF(drive)->channel << 1) + drive->select.b.unit;
- HWIF(drive)->OUTB(number, IDE_FEATURE_REG);
-}
-
-/*
- * pdc4030_cmd handles the set of vendor specific commands that are initiated
- * by command F0. They all have the same success/failure notification -
- * 'P' (=0x50) on success, 'p' (=0x70) on failure.
- */
-int pdc4030_cmd(ide_drive_t *drive, u8 cmd)
-{
- unsigned long timeout;
- u8 status_val;
-
- promise_selectproc(drive); /* redundant? */
- HWIF(drive)->OUTB(0xF3, IDE_SECTOR_REG);
- HWIF(drive)->OUTB(cmd, IDE_SELECT_REG);
- HWIF(drive)->OUTB(PROMISE_EXTENDED_COMMAND, IDE_COMMAND_REG);
- timeout = HZ * 10;
- timeout += jiffies;
- do {
- if(time_after(jiffies, timeout)) {
- return 2; /* device timed out */
- }
- /* Delays at least 10ms to give interface a chance */
- mdelay(10);
- status_val = HWIF(drive)->INB(IDE_SECTOR_REG);
- } while (status_val != 0x50 && status_val != 0x70);
-
- if(status_val == 0x50)
- return 0; /* device returned success */
- else
- return 1; /* device returned failure */
-}
-
-/*
- * pdc4030_identify sends a vendor-specific IDENTIFY command to the drive
- */
-int pdc4030_identify(ide_drive_t *drive)
-{
- return pdc4030_cmd(drive, PROMISE_IDENTIFY);
-}
-
-/*
- * setup_pdc4030()
- * Completes the setup of a Promise DC4030 controller card, once found.
- */
-int __init setup_pdc4030(ide_hwif_t *hwif)
-{
- ide_drive_t *drive;
- ide_hwif_t *hwif2;
- struct dc_ident ident;
- int i;
- ide_startstop_t startstop;
-
- if (!hwif) return 0;
-
- drive = &hwif->drives[0];
- hwif2 = &ide_hwifs[hwif->index+1];
- if (hwif->chipset == ide_pdc4030) /* we've already been found ! */
- return 1;
-
- if (hwif->INB(IDE_NSECTOR_REG) == 0xFF ||
- hwif->INB(IDE_SECTOR_REG) == 0xFF) {
- return 0;
- }
- if (IDE_CONTROL_REG)
- hwif->OUTB(0x08, IDE_CONTROL_REG);
- if (pdc4030_cmd(drive,PROMISE_GET_CONFIG)) {
- return 0;
- }
- if (ide_wait_stat(&startstop, drive,DATA_READY,BAD_W_STAT,WAIT_DRQ)) {
- printk(KERN_INFO
- "%s: Failed Promise read config!\n",hwif->name);
- return 0;
- }
- hwif->ata_input_data(drive, &ident, SECTOR_WORDS);
- if (ident.id[1] != 'P' || ident.id[0] != 'T') {
- return 0;
- }
- printk(KERN_INFO "%s: Promise caching controller, ",hwif->name);
- switch(ident.type) {
- case 0x43: printk("DC4030VL-2, "); break;
- case 0x41: printk("DC4030VL-1, "); break;
- case 0x40: printk("DC4030VL, "); break;
- default:
- printk("unknown - type 0x%02x - please report!\n"
- ,ident.type);
- printk("Please e-mail the following data to "
- "promise@pnd-pc.demon.co.uk along with\n"
- "a description of your card and drives:\n");
- for (i=0; i < 0x90; i++) {
- printk("%02x ", ((unsigned char *)&ident)[i]);
- if ((i & 0x0f) == 0x0f) printk("\n");
- }
- return 0;
- }
- printk("%dKB cache, ",(int)ident.cache_mem);
- switch(ident.irq) {
- case 0x00: hwif->irq = 14; break;
- case 0x01: hwif->irq = 12; break;
- default: hwif->irq = 15; break;
- }
- printk("on IRQ %d\n",hwif->irq);
-
- /*
- * Once found and identified, we set up the next hwif in the array
- * (hwif2 = ide_hwifs[hwif->index+1]) with the same io ports, irq
- * and other settings as the main hwif. This gives us two "mated"
- * hwifs pointing to the Promise card.
- *
- * We also have to shift the default values for the remaining
- * interfaces "up by one" to make room for the second interface on the
- * same set of values.
- */
-
- hwif->chipset = hwif2->chipset = ide_pdc4030;
- hwif->mate = hwif2;
- hwif2->mate = hwif;
- hwif2->channel = 1;
- hwif->rqsize = hwif2->rqsize = 127;
- hwif->no_lba48 = hwif2->no_lba48 = 1;
- hwif->selectproc = hwif2->selectproc = &promise_selectproc;
- hwif->serialized = hwif2->serialized = 1;
- /* DC4030 hosted drives need their own identify... */
- hwif->identify = hwif2->identify = &pdc4030_identify;
-
- /* Override the normal ide disk read/write. */
- hwif->rw_disk = promise_rw_disk;
- hwif2->rw_disk = promise_rw_disk;
-
- /* Shift the remaining interfaces up by one */
- for (i=MAX_HWIFS-1 ; i > hwif->index+1 ; i--) {
- ide_hwif_t *h = &ide_hwifs[i];
-
-#ifdef DEBUG
- printk(KERN_DEBUG "pdc4030: Shifting i/f %d values to i/f %d\n",i-1,i);
-#endif /* DEBUG */
- ide_init_hwif_ports(&h->hw, (h-1)->io_ports[IDE_DATA_OFFSET], 0, NULL);
- memcpy(h->io_ports, h->hw.io_ports, sizeof(h->io_ports));
- h->noprobe = (h-1)->noprobe;
- }
- ide_init_hwif_ports(&hwif2->hw, hwif->io_ports[IDE_DATA_OFFSET], 0, NULL);
- memcpy(hwif2->io_ports, hwif->hw.io_ports, sizeof(hwif2->io_ports));
- hwif2->irq = hwif->irq;
- hwif2->hw.irq = hwif->hw.irq = hwif->irq;
- for (i=0; i<2 ; i++) {
- hwif->drives[i].io_32bit = 3;
- hwif2->drives[i].io_32bit = 3;
- hwif->drives[i].keep_settings = 1;
- hwif2->drives[i].keep_settings = 1;
- if (!ident.current_tm[i].cyl)
- hwif->drives[i].noprobe = 1;
- if (!ident.current_tm[i+2].cyl)
- hwif2->drives[i].noprobe = 1;
- }
-
- probe_hwif_init(&ide_hwifs[hwif->index]);
- probe_hwif_init(&ide_hwifs[hwif2->index]);
-
- return 1;
-}
-
-/*
- * detect_pdc4030()
- * Tests for the presence of a DC4030 Promise card on this interface
- * Returns: 1 if found, 0 if not found
- */
-int __init detect_pdc4030(ide_hwif_t *hwif)
-{
- ide_drive_t *drive = &hwif->drives[0];
-
- if (IDE_DATA_REG == 0) { /* Skip test for non-existent interface */
- return 0;
- }
- hwif->OUTB(0xF3, IDE_SECTOR_REG);
- hwif->OUTB(0x14, IDE_SELECT_REG);
- hwif->OUTB(PROMISE_EXTENDED_COMMAND, IDE_COMMAND_REG);
-
- msleep(50);
-
- if (hwif->INB(IDE_ERROR_REG) == 'P' &&
- hwif->INB(IDE_NSECTOR_REG) == 'T' &&
- hwif->INB(IDE_SECTOR_REG) == 'I') {
- return 1;
- } else {
- return 0;
- }
-}
-
-int __init pdc4030_init(void)
-{
- unsigned int index;
- ide_hwif_t *hwif;
-
- for (index = 0; index < MAX_HWIFS; index++) {
- hwif = &ide_hwifs[index];
- if (hwif->chipset == ide_unknown && detect_pdc4030(hwif)) {
- if (!setup_pdc4030(hwif))
- return -ENODEV;
- return 0;
- }
- }
- return -ENODEV;
-}
-
-#ifdef MODULE
-module_init(pdc4030_init);
-#endif
-
-MODULE_AUTHOR("Peter Denison");
-MODULE_DESCRIPTION("Support of Promise 4030 VLB series IDE chipsets");
-MODULE_LICENSE("GPL");
-
-/*
- * promise_read_intr() is the handler for disk read/multread interrupts
- */
-static ide_startstop_t promise_read_intr (ide_drive_t *drive)
-{
- unsigned int sectors_left, sectors_avail, nsect;
- struct request *rq = HWGROUP(drive)->rq;
- ata_status_t status;
-
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
- if (!OK_STAT(status.all, DATA_READY, BAD_R_STAT))
- return DRIVER(drive)->error(drive, __FUNCTION__, status.all);
-
-read_again:
- do {
- sectors_left = HWIF(drive)->INB(IDE_NSECTOR_REG);
- HWIF(drive)->INB(IDE_SECTOR_REG);
- } while (HWIF(drive)->INB(IDE_NSECTOR_REG) != sectors_left);
- sectors_avail = rq->nr_sectors - sectors_left;
- if (!sectors_avail)
- goto read_again;
-
-read_next:
- nsect = rq->current_nr_sectors;
- if (nsect > sectors_avail)
- nsect = sectors_avail;
- sectors_avail -= nsect;
-
-#ifdef DEBUG_READ
- printk(KERN_DEBUG "%s: %s: sectors(%lu-%lu), rem=%lu\n",
- drive->name, __FUNCTION__,
- (unsigned long)rq->sector,
- (unsigned long)rq->sector + nsect - 1,
- (unsigned long)rq->nr_sectors - nsect);
-#endif /* DEBUG_READ */
-
- HWIF(drive)->ata_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
- rq->buffer += nsect<<9;
- rq->sector += nsect;
- rq->errors = 0;
- rq->nr_sectors -= nsect;
- if (!rq->current_nr_sectors)
- DRIVER(drive)->end_request(drive, 1, 0);
-
-/*
- * Now the data has been read in, do the following:
- *
- * if there are still sectors left in the request,
- * if we know there are still sectors available from the interface,
- * go back and read the next bit of the request.
- * else if DRQ is asserted, there are more sectors available, so
- * go back and find out how many, then read them in.
- * else if BUSY is asserted, we are going to get an interrupt, so
- * set the handler for the interrupt and just return
- */
- if (rq->nr_sectors > 0) {
- if (sectors_avail)
- goto read_next;
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
- if (status.b.drq)
- goto read_again;
- if (status.b.bsy) {
- if (HWGROUP(drive)->handler != NULL)
- BUG();
- ide_set_handler(drive,
- &promise_read_intr,
- WAIT_CMD,
- NULL);
-#ifdef DEBUG_READ
- printk(KERN_DEBUG "%s: promise_read: waiting for"
- "interrupt\n", drive->name);
-#endif /* DEBUG_READ */
- return ide_started;
- }
- printk(KERN_ERR "%s: Eeek! promise_read_intr: sectors left "
- "!DRQ !BUSY\n", drive->name);
- return DRIVER(drive)->error(drive,
- "promise read intr", status.all);
- }
- return ide_stopped;
-}
-
-/*
- * promise_complete_pollfunc()
- * This is the polling function for waiting (nicely!) until drive stops
- * being busy. It is invoked at the end of a write, after the previous poll
- * has finished.
- *
- * Once not busy, the end request is called.
- */
-static ide_startstop_t promise_complete_pollfunc(ide_drive_t *drive)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = &hwgroup->wrq;
- struct bio *bio = rq->bio;
-
- if ((HWIF(drive)->INB(IDE_STATUS_REG)) & BUSY_STAT) {
- if (time_before(jiffies, hwgroup->poll_timeout)) {
- if (hwgroup->handler != NULL)
- BUG();
- ide_set_handler(drive,
- &promise_complete_pollfunc,
- HZ/100,
- NULL);
- return ide_started; /* continue polling... */
- }
- hwgroup->poll_timeout = 0;
- printk(KERN_ERR "%s: completion timeout - still busy!\n",
- drive->name);
- return DRIVER(drive)->error(drive, "busy timeout",
- HWIF(drive)->INB(IDE_STATUS_REG));
- }
-
- hwgroup->poll_timeout = 0;
-#ifdef DEBUG_WRITE
- printk(KERN_DEBUG "%s: Write complete - end_request\n", drive->name);
-#endif /* DEBUG_WRITE */
-
- bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
- rq = hwgroup->rq;
- DRIVER(drive)->end_request(drive, 1, rq->hard_nr_sectors);
-
- return ide_stopped;
-}
-
-/*
- * promise_multwrite() transfers a block of up to mcount sectors of data
- * to a drive as part of a disk multiple-sector write operation.
- */
-static void promise_multwrite (ide_drive_t *drive, unsigned int mcount)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = &hwgroup->wrq;
-
- do {
- char *buffer;
- int nsect = rq->current_nr_sectors;
-
- if (nsect > mcount)
- nsect = mcount;
- mcount -= nsect;
- buffer = rq->buffer;
-
- rq->sector += nsect;
- rq->buffer += nsect << 9;
- rq->nr_sectors -= nsect;
- rq->current_nr_sectors -= nsect;
-
- /* Do we move to the next bh after this? */
- if (!rq->current_nr_sectors) {
- struct bio *bio = rq->bio;
-
- /*
- * only move to next bio, when we have processed
- * all bvecs in this one.
- */
- if (++bio->bi_idx >= bio->bi_vcnt) {
- bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
- bio = bio->bi_next;
- }
-
- /* end early early we ran out of requests */
- if (!bio) {
- mcount = 0;
- } else {
- rq->bio = bio;
- rq->nr_cbio_segments = bio_segments(bio);
- rq->current_nr_sectors = bio_cur_sectors(bio);
- rq->hard_cur_sectors = rq->current_nr_sectors;
- }
- }
-
- /*
- * Ok, we're all setup for the interrupt
- * re-entering us on the last transfer.
- */
- taskfile_output_data(drive, buffer, nsect<<7);
- } while (mcount);
-}
-
-/*
- * promise_write_pollfunc() is the handler for disk write completion polling.
- */
-static ide_startstop_t promise_write_pollfunc (ide_drive_t *drive)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = &hwgroup->wrq;
- struct bio *bio = rq->bio;
-
- if (HWIF(drive)->INB(IDE_NSECTOR_REG) != 0) {
- if (time_before(jiffies, hwgroup->poll_timeout)) {
- if (hwgroup->handler != NULL)
- BUG();
- ide_set_handler(drive,
- &promise_write_pollfunc,
- HZ/100,
- NULL);
- return ide_started; /* continue polling... */
- }
- hwgroup->poll_timeout = 0;
- printk(KERN_ERR "%s: write timed-out!\n",drive->name);
- bio->bi_idx = bio->bi_vcnt - rq->nr_cbio_segments;
- return DRIVER(drive)->error(drive, "write timeout",
- HWIF(drive)->INB(IDE_STATUS_REG));
- }
-
- /*
- * Now write out last 4 sectors and poll for not BUSY
- */
- promise_multwrite(drive, 4);
- hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
- if (hwgroup->handler != NULL)
- BUG();
- ide_set_handler(drive, &promise_complete_pollfunc, HZ/100, NULL);
-#ifdef DEBUG_WRITE
- printk(KERN_DEBUG "%s: Done last 4 sectors - status = %02x\n",
- drive->name, HWIF(drive)->INB(IDE_STATUS_REG));
-#endif /* DEBUG_WRITE */
- return ide_started;
-}
-
-/*
- * promise_write() transfers a block of one or more sectors of data to a
- * drive as part of a disk write operation. All but 4 sectors are transferred
- * in the first attempt, then the interface is polled (nicely!) for completion
- * before the final 4 sectors are transferred. There is no interrupt generated
- * on writes (at least on the DC4030VL-2), we just have to poll for NOT BUSY.
- */
-static ide_startstop_t promise_write (ide_drive_t *drive)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = &hwgroup->wrq;
-
-#ifdef DEBUG_WRITE
- printk(KERN_DEBUG "%s: %s: sectors(%lu-%lu)\n",
- drive->name, __FUNCTION__,
- (unsigned long)rq->sector,
- (unsigned long)rq->sector + rq->nr_sectors - 1);
-#endif /* DEBUG_WRITE */
-
- /*
- * If there are more than 4 sectors to transfer, do n-4 then go into
- * the polling strategy as defined above.
- */
- if (rq->nr_sectors > 4) {
- promise_multwrite(drive, rq->nr_sectors - 4);
- hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
- if (hwgroup->handler != NULL) /* paranoia check */
- BUG();
- ide_set_handler (drive, &promise_write_pollfunc, HZ/100, NULL);
- return ide_started;
- } else {
- /*
- * There are 4 or fewer sectors to transfer, do them all in one go
- * and wait for NOT BUSY.
- */
- promise_multwrite(drive, rq->nr_sectors);
- hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
- if (hwgroup->handler != NULL)
- BUG();
- ide_set_handler(drive,
- &promise_complete_pollfunc,
- HZ/100,
- NULL);
-
-#ifdef DEBUG_WRITE
- printk(KERN_DEBUG "%s: promise_write: <= 4 sectors, "
- "status = %02x\n", drive->name,
- HWIF(drive)->INB(IDE_STATUS_REG));
-#endif /* DEBUG_WRITE */
- return ide_started;
- }
-}
-
-/*
- * do_pdc4030_io() is called from promise_rw_disk, having had the block number
- * already set up. It issues a READ or WRITE command to the Promise
- * controller, assuming LBA has been used to set up the block number.
- */
-ide_startstop_t do_pdc4030_io (ide_drive_t *drive, struct request *rq)
-{
- ide_startstop_t startstop;
- unsigned long timeout;
- u8 stat = 0;
-
- if (rq_data_dir(rq) == READ) {
- HWIF(drive)->OUTB(PROMISE_READ, IDE_COMMAND_REG);
-/*
- * The card's behaviour is odd at this point. If the data is
- * available, DRQ will be true, and no interrupt will be
- * generated by the card. If this is the case, we need to call the
- * "interrupt" handler (promise_read_intr) directly. Otherwise, if
- * an interrupt is going to occur, bit0 of the SELECT register will
- * be high, so we can set the handler the just return and be interrupted.
- * If neither of these is the case, we wait for up to 50ms (badly I'm
- * afraid!) until one of them is.
- */
- timeout = jiffies + HZ/20; /* 50ms wait */
- do {
- stat = HWIF(drive)->INB(IDE_STATUS_REG);
- if (stat & DRQ_STAT) {
- udelay(1);
- return promise_read_intr(drive);
- }
- if (HWIF(drive)->INB(IDE_SELECT_REG) & 0x01) {
-#ifdef DEBUG_READ
- printk(KERN_DEBUG "%s: read: waiting for "
- "interrupt\n", drive->name);
-#endif /* DEBUG_READ */
- ide_set_handler(drive,
- &promise_read_intr,
- WAIT_CMD,
- NULL);
- return ide_started;
- }
- udelay(1);
- } while (time_before(jiffies, timeout));
-
- printk(KERN_ERR "%s: reading: No DRQ and not "
- "waiting - Odd!\n", drive->name);
- return ide_stopped;
- } else {
- HWIF(drive)->OUTB(PROMISE_WRITE, IDE_COMMAND_REG);
- if (ide_wait_stat(&startstop, drive, DATA_READY,
- drive->bad_wstat, WAIT_DRQ)) {
- printk(KERN_ERR "%s: no DRQ after issuing "
- "PROMISE_WRITE\n", drive->name);
- return startstop;
- }
- if (!drive->unmask)
- local_irq_disable();
- HWGROUP(drive)->wrq = *rq; /* scratchpad */
- return promise_write(drive);
- }
-}
-
-static ide_startstop_t promise_rw_disk (ide_drive_t *drive, struct request *rq, sector_t block)
-{
- /* The four drives on the two logical (one physical) interfaces
- are distinguished by writing the drive number (0-3) to the
- Feature register.
- FIXME: Is promise_selectproc now redundant??
- */
- ide_hwif_t *hwif = HWIF(drive);
- int drive_number = (hwif->channel << 1) + drive->select.b.unit;
-
- BUG_ON(rq->nr_sectors > 127);
-
- if (IDE_CONTROL_REG)
- hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
- hwif->OUTB(drive_number, IDE_FEATURE_REG);
- hwif->OUTB(rq->nr_sectors, IDE_NSECTOR_REG);
- hwif->OUTB(block,IDE_SECTOR_REG);
- hwif->OUTB(block>>=8,IDE_LCYL_REG);
- hwif->OUTB(block>>=8,IDE_HCYL_REG);
- hwif->OUTB(((block>>8)&0x0f)|drive->select.all,IDE_SELECT_REG);
-
- return do_pdc4030_io(drive, rq);
-}
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