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https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
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279 lines
7.1 KiB
C
279 lines
7.1 KiB
C
/*
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* Disk Array driver for Compaq SMART2 Controllers
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* Copyright 1998 Compaq Computer Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Questions/Comments/Bugfixes to iss_storagedev@hp.com
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*
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* If you want to make changes, improve or add functionality to this
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* driver, you'll probably need the Compaq Array Controller Interface
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* Specificiation (Document number ECG086/1198)
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*/
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/*
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* This file contains the controller communication implementation for
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* Compaq SMART-1 and SMART-2 controllers. To the best of my knowledge,
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* this should support:
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*
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* PCI:
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* SMART-2/P, SMART-2DH, SMART-2SL, SMART-221, SMART-3100ES, SMART-3200
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* Integerated SMART Array Controller, SMART-4200, SMART-4250ES
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*
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* EISA:
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* SMART-2/E, SMART, IAES, IDA-2, IDA
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*/
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/*
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* Memory mapped FIFO interface (SMART 42xx cards)
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*/
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static void smart4_submit_command(ctlr_info_t *h, cmdlist_t *c)
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{
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writel(c->busaddr, h->vaddr + S42XX_REQUEST_PORT_OFFSET);
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}
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/*
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* This card is the opposite of the other cards.
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* 0 turns interrupts on...
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* 0x08 turns them off...
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*/
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static void smart4_intr_mask(ctlr_info_t *h, unsigned long val)
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{
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if (val)
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{ /* Turn interrupts on */
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writel(0, h->vaddr + S42XX_REPLY_INTR_MASK_OFFSET);
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} else /* Turn them off */
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{
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writel( S42XX_INTR_OFF,
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h->vaddr + S42XX_REPLY_INTR_MASK_OFFSET);
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}
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}
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/*
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* For older cards FIFO Full = 0.
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* On this card 0 means there is room, anything else FIFO Full.
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*
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*/
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static unsigned long smart4_fifo_full(ctlr_info_t *h)
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{
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return (!readl(h->vaddr + S42XX_REQUEST_PORT_OFFSET));
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}
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/* This type of controller returns -1 if the fifo is empty,
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* Not 0 like the others.
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* And we need to let it know we read a value out
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*/
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static unsigned long smart4_completed(ctlr_info_t *h)
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{
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long register_value
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= readl(h->vaddr + S42XX_REPLY_PORT_OFFSET);
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/* Fifo is empty */
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if( register_value == 0xffffffff)
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return 0;
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/* Need to let it know we got the reply */
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/* We do this by writing a 0 to the port we just read from */
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writel(0, h->vaddr + S42XX_REPLY_PORT_OFFSET);
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return ((unsigned long) register_value);
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}
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/*
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* This hardware returns interrupt pending at a different place and
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* it does not tell us if the fifo is empty, we will have check
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* that by getting a 0 back from the command_completed call.
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*/
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static unsigned long smart4_intr_pending(ctlr_info_t *h)
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{
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unsigned long register_value =
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readl(h->vaddr + S42XX_INTR_STATUS);
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if( register_value & S42XX_INTR_PENDING)
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return FIFO_NOT_EMPTY;
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return 0 ;
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}
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static struct access_method smart4_access = {
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smart4_submit_command,
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smart4_intr_mask,
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smart4_fifo_full,
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smart4_intr_pending,
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smart4_completed,
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};
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/*
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* Memory mapped FIFO interface (PCI SMART2 and SMART 3xxx cards)
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*/
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static void smart2_submit_command(ctlr_info_t *h, cmdlist_t *c)
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{
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writel(c->busaddr, h->vaddr + COMMAND_FIFO);
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}
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static void smart2_intr_mask(ctlr_info_t *h, unsigned long val)
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{
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writel(val, h->vaddr + INTR_MASK);
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}
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static unsigned long smart2_fifo_full(ctlr_info_t *h)
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{
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return readl(h->vaddr + COMMAND_FIFO);
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}
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static unsigned long smart2_completed(ctlr_info_t *h)
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{
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return readl(h->vaddr + COMMAND_COMPLETE_FIFO);
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}
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static unsigned long smart2_intr_pending(ctlr_info_t *h)
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{
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return readl(h->vaddr + INTR_PENDING);
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}
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static struct access_method smart2_access = {
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smart2_submit_command,
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smart2_intr_mask,
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smart2_fifo_full,
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smart2_intr_pending,
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smart2_completed,
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};
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/*
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* IO access for SMART-2/E cards
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*/
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static void smart2e_submit_command(ctlr_info_t *h, cmdlist_t *c)
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{
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outl(c->busaddr, h->io_mem_addr + COMMAND_FIFO);
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}
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static void smart2e_intr_mask(ctlr_info_t *h, unsigned long val)
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{
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outl(val, h->io_mem_addr + INTR_MASK);
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}
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static unsigned long smart2e_fifo_full(ctlr_info_t *h)
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{
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return inl(h->io_mem_addr + COMMAND_FIFO);
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}
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static unsigned long smart2e_completed(ctlr_info_t *h)
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{
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return inl(h->io_mem_addr + COMMAND_COMPLETE_FIFO);
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}
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static unsigned long smart2e_intr_pending(ctlr_info_t *h)
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{
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return inl(h->io_mem_addr + INTR_PENDING);
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}
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static struct access_method smart2e_access = {
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smart2e_submit_command,
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smart2e_intr_mask,
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smart2e_fifo_full,
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smart2e_intr_pending,
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smart2e_completed,
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};
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/*
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* IO access for older SMART-1 type cards
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*/
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#define SMART1_SYSTEM_MASK 0xC8E
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#define SMART1_SYSTEM_DOORBELL 0xC8F
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#define SMART1_LOCAL_MASK 0xC8C
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#define SMART1_LOCAL_DOORBELL 0xC8D
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#define SMART1_INTR_MASK 0xC89
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#define SMART1_LISTADDR 0xC90
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#define SMART1_LISTLEN 0xC94
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#define SMART1_TAG 0xC97
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#define SMART1_COMPLETE_ADDR 0xC98
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#define SMART1_LISTSTATUS 0xC9E
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#define CHANNEL_BUSY 0x01
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#define CHANNEL_CLEAR 0x02
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static void smart1_submit_command(ctlr_info_t *h, cmdlist_t *c)
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{
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/*
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* This __u16 is actually a bunch of control flags on SMART
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* and below. We want them all to be zero.
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*/
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c->hdr.size = 0;
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outb(CHANNEL_CLEAR, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
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outl(c->busaddr, h->io_mem_addr + SMART1_LISTADDR);
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outw(c->size, h->io_mem_addr + SMART1_LISTLEN);
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outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
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}
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static void smart1_intr_mask(ctlr_info_t *h, unsigned long val)
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{
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if (val == 1) {
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outb(0xFD, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
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outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
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outb(0x01, h->io_mem_addr + SMART1_INTR_MASK);
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outb(0x01, h->io_mem_addr + SMART1_SYSTEM_MASK);
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} else {
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outb(0, h->io_mem_addr + 0xC8E);
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}
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}
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static unsigned long smart1_fifo_full(ctlr_info_t *h)
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{
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unsigned char chan;
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chan = inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_CLEAR;
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return chan;
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}
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static unsigned long smart1_completed(ctlr_info_t *h)
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{
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unsigned char status;
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unsigned long cmd;
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if (inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_BUSY) {
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outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
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cmd = inl(h->io_mem_addr + SMART1_COMPLETE_ADDR);
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status = inb(h->io_mem_addr + SMART1_LISTSTATUS);
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outb(CHANNEL_CLEAR, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
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/*
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* this is x86 (actually compaq x86) only, so it's ok
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*/
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if (cmd) ((cmdlist_t*)bus_to_virt(cmd))->req.hdr.rcode = status;
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} else {
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cmd = 0;
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}
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return cmd;
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}
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static unsigned long smart1_intr_pending(ctlr_info_t *h)
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{
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unsigned char chan;
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chan = inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_BUSY;
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return chan;
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}
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static struct access_method smart1_access = {
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smart1_submit_command,
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smart1_intr_mask,
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smart1_fifo_full,
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smart1_intr_pending,
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smart1_completed,
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};
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