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-rw-r--r--drivers/block/promise.c362
1 files changed, 0 insertions, 362 deletions
diff --git a/drivers/block/promise.c b/drivers/block/promise.c
index f3a8d5529..e69de29bb 100644
--- a/drivers/block/promise.c
+++ b/drivers/block/promise.c
@@ -1,362 +0,0 @@
-/* -*- linux-c -*-
- * linux/drivers/block/promise.c Version 0.07 Mar 26, 1996
- *
- * Copyright (C) 1995-1996 Linus Torvalds & authors (see below)
- */
-
-/*
- * Principal Author/Maintainer: peterd@pnd-pc.demon.co.uk
- *
- * This file provides support for the second port and cache of Promise
- * IDE interfaces, e.g. DC4030, DC5030.
- *
- * 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.
- *
- * 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
- */
-
-/*
- * 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'
- *
- * As before, it seems that somewhere around 3Megs when writing, bad things
- * start to happen [timeouts/retries -ml]. If anyone can give me more feedback,
- * I'd really appreciate it. [email: peterd@pnd-pc.demon.co.uk]
- *
- */
-
-
-#undef REALLY_SLOW_IO /* most systems can safely undef this */
-
-#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 <asm/io.h>
-#include <asm/irq.h>
-#include "ide.h"
-#include "promise.h"
-
-/* This is needed as the controller may not interrupt if the required data is
-available in the cache. We have to simulate an interrupt. Ugh! */
-
-extern void ide_intr(int, void *dev_id, struct pt_regs*);
-
-/*
- * 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;
-
- OUT_BYTE(drive->select.all,IDE_SELECT_REG);
- udelay(1); /* paranoia */
- number = ((HWIF(drive)->is_promise2)<<1) + drive->select.b.unit;
- OUT_BYTE(number,IDE_FEATURE_REG);
-}
-
-/*
- * promise_cmd handles the set of vendor specific commands that are initiated
- * by command F0. They all have the same success/failure notification.
- */
-int promise_cmd(ide_drive_t *drive, byte cmd)
-{
- unsigned long timeout, timer;
- byte status_val;
-
- promise_selectproc(drive); /* redundant? */
- OUT_BYTE(0xF3,IDE_SECTOR_REG);
- OUT_BYTE(cmd,IDE_SELECT_REG);
- OUT_BYTE(PROMISE_EXTENDED_COMMAND,IDE_COMMAND_REG);
- timeout = HZ * 10;
- timeout += jiffies;
- do {
- if(jiffies > timeout) {
- return 2; /* device timed out */
- }
- /* This is out of delay_10ms() */
- /* Delays at least 10ms to give interface a chance */
- timer = jiffies + (HZ + 99)/100 + 1;
- while (timer > jiffies);
- status_val = IN_BYTE(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 */
-}
-
-ide_hwif_t *hwif_required = NULL;
-
-void setup_dc4030 (ide_hwif_t *hwif)
-{
- hwif_required = hwif;
-}
-
-/*
-init_dc4030: Test for presence of a Promise caching controller card.
-Returns: 0 if no Promise card present at this io_base
- 1 if Promise card found
-*/
-int init_dc4030 (void)
-{
- ide_hwif_t *hwif = hwif_required;
- ide_drive_t *drive;
- ide_hwif_t *second_hwif;
- struct dc_ident ident;
- int i;
-
- if (!hwif) return 0;
-
- drive = &hwif->drives[0];
- second_hwif = &ide_hwifs[hwif->index+1];
- if(hwif->is_promise2) /* we've already been found ! */
- return 1;
-
- if(IN_BYTE(IDE_NSECTOR_REG) == 0xFF || IN_BYTE(IDE_SECTOR_REG) == 0xFF)
- {
- return 0;
- }
- OUT_BYTE(0x08,IDE_CONTROL_REG);
- if(promise_cmd(drive,PROMISE_GET_CONFIG)) {
- return 0;
- }
- if(ide_wait_stat(drive,DATA_READY,BAD_W_STAT,WAIT_DRQ)) {
- printk("%s: Failed Promise read config!\n",hwif->name);
- return 0;
- }
- ide_input_data(drive,&ident,SECTOR_WORDS);
- if(ident.id[1] != 'P' || ident.id[0] != 'T') {
- return 0;
- }
- printk("%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);
- 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);
- hwif->chipset = second_hwif->chipset = ide_promise;
- hwif->selectproc = second_hwif->selectproc = &promise_selectproc;
-/* Shift the remaining interfaces down by one */
- for (i=MAX_HWIFS-1 ; i > hwif->index+1 ; i--) {
- ide_hwif_t *h = &ide_hwifs[i];
-
- printk("Shifting i/f %d values to i/f %d\n",i-1,i);
- ide_init_hwif_ports(h->io_ports, (h-1)->io_ports[IDE_DATA_OFFSET], NULL);
- h->io_ports[IDE_CONTROL_OFFSET] = (h-1)->io_ports[IDE_CONTROL_OFFSET];
- h->noprobe = (h-1)->noprobe;
- }
- second_hwif->is_promise2 = 1;
- ide_init_hwif_ports(second_hwif->io_ports, hwif->io_ports[IDE_DATA_OFFSET], NULL);
- second_hwif->io_ports[IDE_CONTROL_OFFSET] = hwif->io_ports[IDE_CONTROL_OFFSET];
- second_hwif->irq = hwif->irq;
- for (i=0; i<2 ; i++) {
- hwif->drives[i].io_32bit = 3;
- second_hwif->drives[i].io_32bit = 3;
- if(!ident.current_tm[i+2].cyl) second_hwif->drives[i].noprobe=1;
- }
- return 1;
-}
-
-/*
- * promise_read_intr() is the handler for disk read/multread interrupts
- */
-static void promise_read_intr (ide_drive_t *drive)
-{
- byte stat;
- int i;
- unsigned int sectors_left, sectors_avail, nsect;
- struct request *rq;
-
- if (!OK_STAT(stat=GET_STAT(),DATA_READY,BAD_R_STAT)) {
- ide_error(drive, "promise_read_intr", stat);
- return;
- }
-
-read_again:
- do {
- sectors_left = IN_BYTE(IDE_NSECTOR_REG);
- IN_BYTE(IDE_SECTOR_REG);
- } while (IN_BYTE(IDE_NSECTOR_REG) != sectors_left);
- rq = HWGROUP(drive)->rq;
- sectors_avail = rq->nr_sectors - sectors_left;
-
-read_next:
- rq = HWGROUP(drive)->rq;
- if ((nsect = rq->current_nr_sectors) > sectors_avail)
- nsect = sectors_avail;
- sectors_avail -= nsect;
- ide_input_data(drive, rq->buffer, nsect * SECTOR_WORDS);
-#ifdef DEBUG
- printk("%s: promise_read: sectors(%ld-%ld), buffer=0x%08lx, "
- "remaining=%ld\n", drive->name, rq->sector, rq->sector+nsect-1,
- (unsigned long) rq->buffer+(nsect<<9), rq->nr_sectors-nsect);
-#endif
- rq->sector += nsect;
- rq->buffer += nsect<<9;
- rq->errors = 0;
- i = (rq->nr_sectors -= nsect);
- if ((rq->current_nr_sectors -= nsect) <= 0)
- ide_end_request(1, HWGROUP(drive));
- if (i > 0) {
- if (sectors_avail)
- goto read_next;
- stat = GET_STAT();
- if(stat & DRQ_STAT)
- goto read_again;
- if(stat & BUSY_STAT) {
- ide_set_handler (drive, &promise_read_intr, WAIT_CMD);
- return;
- }
- printk("Ah! promise read intr: sectors left !DRQ !BUSY\n");
- ide_error(drive, "promise read intr", stat);
- }
-}
-
-/*
- * promise_write_pollfunc() is the handler for disk write completion polling.
- */
-static void promise_write_pollfunc (ide_drive_t *drive)
-{
- int i;
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq;
-
- if (IN_BYTE(IDE_NSECTOR_REG) != 0) {
- if (jiffies < hwgroup->poll_timeout) {
- ide_set_handler (drive, &promise_write_pollfunc, 1);
- return; /* continue polling... */
- }
- printk("%s: write timed-out!\n",drive->name);
- ide_error (drive, "write timeout", GET_STAT());
- return;
- }
-
- ide_multwrite(drive, 4);
- rq = hwgroup->rq;
- for (i = rq->nr_sectors; i > 0;) {
- i -= rq->current_nr_sectors;
- ide_end_request(1, hwgroup);
- }
- return;
-}
-
-/*
- * 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 transfered
- * in the first attempt, then the interface is polled (nicely!) for completion
- * before the final 4 sectors are transfered. Don't ask me why, but this is
- * how it's done in the drivers for other O/Ses. There is no interrupt
- * generated on writes, which is why we have to do it like this.
- */
-static void promise_write (ide_drive_t *drive)
-{
- ide_hwgroup_t *hwgroup = HWGROUP(drive);
- struct request *rq = &hwgroup->wrq;
- int i;
-
- if (rq->nr_sectors > 4) {
- ide_multwrite(drive, rq->nr_sectors - 4);
- hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
- ide_set_handler (drive, &promise_write_pollfunc, 1);
- return;
- } else {
- ide_multwrite(drive, rq->nr_sectors);
- rq = hwgroup->rq;
- for (i = rq->nr_sectors; i > 0;) {
- i -= rq->current_nr_sectors;
- ide_end_request(1, hwgroup);
- }
- }
-}
-
-/*
- * do_promise_io() is called from do_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.
- */
-void do_promise_io (ide_drive_t *drive, struct request *rq)
-{
- unsigned long timeout;
- byte stat;
-
- if (rq->cmd == READ) {
- ide_set_handler(drive, &promise_read_intr, WAIT_CMD);
- OUT_BYTE(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 simulate
- an interrupt. Ugh! Otherwise, if an interrupt will occur, bit0
- of the SELECT register will be high, so we can just return and
- be interrupted.*/
- timeout = jiffies + HZ/20; /* 50ms wait */
- do {
- stat=GET_STAT();
- if(stat & DRQ_STAT) {
-/* unsigned long flags;
- save_flags(flags);
- cli();
- disable_irq(HWIF(drive)->irq);
-*/
- ide_intr(HWIF(drive)->irq,HWGROUP(drive),NULL);
-/* enable_irq(HWIF(drive)->irq);
- restore_flags(flags);
-*/
- return;
- }
- if(IN_BYTE(IDE_SELECT_REG) & 0x01)
- return;
- udelay(1);
- } while (jiffies < timeout);
- printk("%s: reading: No DRQ and not waiting - Odd!\n",
- drive->name);
- return;
- }
- if (rq->cmd == WRITE) {
- OUT_BYTE(PROMISE_WRITE, IDE_COMMAND_REG);
- if (ide_wait_stat(drive, DATA_READY, drive->bad_wstat, WAIT_DRQ)) {
- printk("%s: no DRQ after issuing PROMISE_WRITE\n", drive->name);
- return;
- }
- if (!drive->unmask)
- cli();
- HWGROUP(drive)->wrq = *rq; /* scratchpad */
- promise_write(drive);
- return;
- }
- printk("%s: bad command: %d\n", drive->name, rq->cmd);
- ide_end_request(0, HWGROUP(drive));
-}
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