mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 17:51:43 +00:00
279 lines
7.1 KiB
C
279 lines
7.1 KiB
C
/*
|
|
* Disk Array driver for Compaq SMART2 Controllers
|
|
* Copyright 1998 Compaq Computer Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Questions/Comments/Bugfixes to iss_storagedev@hp.com
|
|
*
|
|
* If you want to make changes, improve or add functionality to this
|
|
* driver, you'll probably need the Compaq Array Controller Interface
|
|
* Specificiation (Document number ECG086/1198)
|
|
*/
|
|
|
|
/*
|
|
* This file contains the controller communication implementation for
|
|
* Compaq SMART-1 and SMART-2 controllers. To the best of my knowledge,
|
|
* this should support:
|
|
*
|
|
* PCI:
|
|
* SMART-2/P, SMART-2DH, SMART-2SL, SMART-221, SMART-3100ES, SMART-3200
|
|
* Integerated SMART Array Controller, SMART-4200, SMART-4250ES
|
|
*
|
|
* EISA:
|
|
* SMART-2/E, SMART, IAES, IDA-2, IDA
|
|
*/
|
|
|
|
/*
|
|
* Memory mapped FIFO interface (SMART 42xx cards)
|
|
*/
|
|
static void smart4_submit_command(ctlr_info_t *h, cmdlist_t *c)
|
|
{
|
|
writel(c->busaddr, h->vaddr + S42XX_REQUEST_PORT_OFFSET);
|
|
}
|
|
|
|
/*
|
|
* This card is the opposite of the other cards.
|
|
* 0 turns interrupts on...
|
|
* 0x08 turns them off...
|
|
*/
|
|
static void smart4_intr_mask(ctlr_info_t *h, unsigned long val)
|
|
{
|
|
if (val)
|
|
{ /* Turn interrupts on */
|
|
writel(0, h->vaddr + S42XX_REPLY_INTR_MASK_OFFSET);
|
|
} else /* Turn them off */
|
|
{
|
|
writel( S42XX_INTR_OFF,
|
|
h->vaddr + S42XX_REPLY_INTR_MASK_OFFSET);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For older cards FIFO Full = 0.
|
|
* On this card 0 means there is room, anything else FIFO Full.
|
|
*
|
|
*/
|
|
static unsigned long smart4_fifo_full(ctlr_info_t *h)
|
|
{
|
|
|
|
return (!readl(h->vaddr + S42XX_REQUEST_PORT_OFFSET));
|
|
}
|
|
|
|
/* This type of controller returns -1 if the fifo is empty,
|
|
* Not 0 like the others.
|
|
* And we need to let it know we read a value out
|
|
*/
|
|
static unsigned long smart4_completed(ctlr_info_t *h)
|
|
{
|
|
long register_value
|
|
= readl(h->vaddr + S42XX_REPLY_PORT_OFFSET);
|
|
|
|
/* Fifo is empty */
|
|
if( register_value == 0xffffffff)
|
|
return 0;
|
|
|
|
/* Need to let it know we got the reply */
|
|
/* We do this by writing a 0 to the port we just read from */
|
|
writel(0, h->vaddr + S42XX_REPLY_PORT_OFFSET);
|
|
|
|
return ((unsigned long) register_value);
|
|
}
|
|
|
|
/*
|
|
* This hardware returns interrupt pending at a different place and
|
|
* it does not tell us if the fifo is empty, we will have check
|
|
* that by getting a 0 back from the command_completed call.
|
|
*/
|
|
static unsigned long smart4_intr_pending(ctlr_info_t *h)
|
|
{
|
|
unsigned long register_value =
|
|
readl(h->vaddr + S42XX_INTR_STATUS);
|
|
|
|
if( register_value & S42XX_INTR_PENDING)
|
|
return FIFO_NOT_EMPTY;
|
|
return 0 ;
|
|
}
|
|
|
|
static struct access_method smart4_access = {
|
|
smart4_submit_command,
|
|
smart4_intr_mask,
|
|
smart4_fifo_full,
|
|
smart4_intr_pending,
|
|
smart4_completed,
|
|
};
|
|
|
|
/*
|
|
* Memory mapped FIFO interface (PCI SMART2 and SMART 3xxx cards)
|
|
*/
|
|
static void smart2_submit_command(ctlr_info_t *h, cmdlist_t *c)
|
|
{
|
|
writel(c->busaddr, h->vaddr + COMMAND_FIFO);
|
|
}
|
|
|
|
static void smart2_intr_mask(ctlr_info_t *h, unsigned long val)
|
|
{
|
|
writel(val, h->vaddr + INTR_MASK);
|
|
}
|
|
|
|
static unsigned long smart2_fifo_full(ctlr_info_t *h)
|
|
{
|
|
return readl(h->vaddr + COMMAND_FIFO);
|
|
}
|
|
|
|
static unsigned long smart2_completed(ctlr_info_t *h)
|
|
{
|
|
return readl(h->vaddr + COMMAND_COMPLETE_FIFO);
|
|
}
|
|
|
|
static unsigned long smart2_intr_pending(ctlr_info_t *h)
|
|
{
|
|
return readl(h->vaddr + INTR_PENDING);
|
|
}
|
|
|
|
static struct access_method smart2_access = {
|
|
smart2_submit_command,
|
|
smart2_intr_mask,
|
|
smart2_fifo_full,
|
|
smart2_intr_pending,
|
|
smart2_completed,
|
|
};
|
|
|
|
/*
|
|
* IO access for SMART-2/E cards
|
|
*/
|
|
static void smart2e_submit_command(ctlr_info_t *h, cmdlist_t *c)
|
|
{
|
|
outl(c->busaddr, h->io_mem_addr + COMMAND_FIFO);
|
|
}
|
|
|
|
static void smart2e_intr_mask(ctlr_info_t *h, unsigned long val)
|
|
{
|
|
outl(val, h->io_mem_addr + INTR_MASK);
|
|
}
|
|
|
|
static unsigned long smart2e_fifo_full(ctlr_info_t *h)
|
|
{
|
|
return inl(h->io_mem_addr + COMMAND_FIFO);
|
|
}
|
|
|
|
static unsigned long smart2e_completed(ctlr_info_t *h)
|
|
{
|
|
return inl(h->io_mem_addr + COMMAND_COMPLETE_FIFO);
|
|
}
|
|
|
|
static unsigned long smart2e_intr_pending(ctlr_info_t *h)
|
|
{
|
|
return inl(h->io_mem_addr + INTR_PENDING);
|
|
}
|
|
|
|
static struct access_method smart2e_access = {
|
|
smart2e_submit_command,
|
|
smart2e_intr_mask,
|
|
smart2e_fifo_full,
|
|
smart2e_intr_pending,
|
|
smart2e_completed,
|
|
};
|
|
|
|
/*
|
|
* IO access for older SMART-1 type cards
|
|
*/
|
|
#define SMART1_SYSTEM_MASK 0xC8E
|
|
#define SMART1_SYSTEM_DOORBELL 0xC8F
|
|
#define SMART1_LOCAL_MASK 0xC8C
|
|
#define SMART1_LOCAL_DOORBELL 0xC8D
|
|
#define SMART1_INTR_MASK 0xC89
|
|
#define SMART1_LISTADDR 0xC90
|
|
#define SMART1_LISTLEN 0xC94
|
|
#define SMART1_TAG 0xC97
|
|
#define SMART1_COMPLETE_ADDR 0xC98
|
|
#define SMART1_LISTSTATUS 0xC9E
|
|
|
|
#define CHANNEL_BUSY 0x01
|
|
#define CHANNEL_CLEAR 0x02
|
|
|
|
static void smart1_submit_command(ctlr_info_t *h, cmdlist_t *c)
|
|
{
|
|
/*
|
|
* This __u16 is actually a bunch of control flags on SMART
|
|
* and below. We want them all to be zero.
|
|
*/
|
|
c->hdr.size = 0;
|
|
|
|
outb(CHANNEL_CLEAR, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
|
|
|
|
outl(c->busaddr, h->io_mem_addr + SMART1_LISTADDR);
|
|
outw(c->size, h->io_mem_addr + SMART1_LISTLEN);
|
|
|
|
outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
|
|
}
|
|
|
|
static void smart1_intr_mask(ctlr_info_t *h, unsigned long val)
|
|
{
|
|
if (val == 1) {
|
|
outb(0xFD, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
|
|
outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
|
|
outb(0x01, h->io_mem_addr + SMART1_INTR_MASK);
|
|
outb(0x01, h->io_mem_addr + SMART1_SYSTEM_MASK);
|
|
} else {
|
|
outb(0, h->io_mem_addr + 0xC8E);
|
|
}
|
|
}
|
|
|
|
static unsigned long smart1_fifo_full(ctlr_info_t *h)
|
|
{
|
|
unsigned char chan;
|
|
chan = inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_CLEAR;
|
|
return chan;
|
|
}
|
|
|
|
static unsigned long smart1_completed(ctlr_info_t *h)
|
|
{
|
|
unsigned char status;
|
|
unsigned long cmd;
|
|
|
|
if (inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_BUSY) {
|
|
outb(CHANNEL_BUSY, h->io_mem_addr + SMART1_SYSTEM_DOORBELL);
|
|
|
|
cmd = inl(h->io_mem_addr + SMART1_COMPLETE_ADDR);
|
|
status = inb(h->io_mem_addr + SMART1_LISTSTATUS);
|
|
|
|
outb(CHANNEL_CLEAR, h->io_mem_addr + SMART1_LOCAL_DOORBELL);
|
|
|
|
/*
|
|
* this is x86 (actually compaq x86) only, so it's ok
|
|
*/
|
|
if (cmd) ((cmdlist_t*)bus_to_virt(cmd))->req.hdr.rcode = status;
|
|
} else {
|
|
cmd = 0;
|
|
}
|
|
return cmd;
|
|
}
|
|
|
|
static unsigned long smart1_intr_pending(ctlr_info_t *h)
|
|
{
|
|
unsigned char chan;
|
|
chan = inb(h->io_mem_addr + SMART1_SYSTEM_DOORBELL) & CHANNEL_BUSY;
|
|
return chan;
|
|
}
|
|
|
|
static struct access_method smart1_access = {
|
|
smart1_submit_command,
|
|
smart1_intr_mask,
|
|
smart1_fifo_full,
|
|
smart1_intr_pending,
|
|
smart1_completed,
|
|
};
|