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/*
* linux/drivers/block/buddha.c -- Amiga Buddha and Catweasel IDE Driver
*
* Copyright (C) 1997 by Geert Uytterhoeven
*
* This driver was written by based on the specifications in README.buddha.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
* TODO:
* - test it :-)
* - tune the timings using the speed-register
*/
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/zorro.h>
#include <linux/ide.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
/*
* The Buddha has 2 IDE interfaces, the Catweasel has 3
*/
#define BUDDHA_NUM_HWIFS 2
#define CATWEASEL_NUM_HWIFS 3
/*
* Bases of the IDE interfaces (relative to the board address)
*/
#define BUDDHA_BASE1 0x800
#define BUDDHA_BASE2 0xa00
#define BUDDHA_BASE3 0xc00
static const u_int buddha_bases[CATWEASEL_NUM_HWIFS] = {
BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
};
/*
* Offsets from one of the above bases
*/
#define BUDDHA_DATA 0x00
#define BUDDHA_ERROR 0x06 /* see err-bits */
#define BUDDHA_NSECTOR 0x0a /* nr of sectors to read/write */
#define BUDDHA_SECTOR 0x0e /* starting sector */
#define BUDDHA_LCYL 0x12 /* starting cylinder */
#define BUDDHA_HCYL 0x16 /* high byte of starting cyl */
#define BUDDHA_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
#define BUDDHA_STATUS 0x1e /* see status-bits */
#define BUDDHA_CONTROL 0x11a
static int buddha_offsets[IDE_NR_PORTS] = {
BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL
};
/*
* Other registers
*/
#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
#define BUDDHA_IRQ2 0xf40 /* interrupt */
#define BUDDHA_IRQ3 0xf80
static const int buddha_irqports[CATWEASEL_NUM_HWIFS] = {
BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
};
#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
/*
* Board information
*/
static u_long buddha_board = 0;
static int buddha_num_hwifs = -1;
/*
* Check and acknowledge the interrupt status
*/
static int buddha_ack_intr(ide_hwif_t *hwif)
{
unsigned char ch;
ch = inb(hwif->io_ports[IDE_IRQ_OFFSET]);
if (!(ch & 0x80))
return 0;
return 1;
}
/*
* Any Buddha or Catweasel boards present?
*/
static int find_buddha(void)
{
u_int key;
const struct ConfigDev *cd;
buddha_num_hwifs = 0;
if ((key = zorro_find(ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA, 0, 0)))
buddha_num_hwifs = BUDDHA_NUM_HWIFS;
else if ((key = zorro_find(ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL, 0,
0)))
buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
if (key) {
cd = zorro_get_board(key);
buddha_board = (u_long)cd->cd_BoardAddr;
if (buddha_board) {
buddha_board = ZTWO_VADDR(buddha_board);
/* write to BUDDHA_IRQ_MR to enable the board IRQ */
*(char *)(buddha_board+BUDDHA_IRQ_MR) = 0;
zorro_config_board(key, 0);
}
}
return buddha_num_hwifs;
}
/*
* Probe for a Buddha or Catweasel IDE interface
* We support only _one_ of them, no multiple boards!
*/
void buddha_init(void)
{
hw_regs_t hw;
int i, index;
if (buddha_num_hwifs < 0 && !find_buddha())
return;
for (i = 0; i < buddha_num_hwifs; i++) {
ide_setup_ports(&hw, (ide_ioreg_t)(buddha_board+buddha_bases[i]),
buddha_offsets, 0,
(ide_ioreg_t)(buddha_board+buddha_irqports[i]),
buddha_ack_intr, IRQ_AMIGA_PORTS);
index = ide_register_hw(&hw, NULL);
if (index != -1)
printk("ide%d: %s IDE interface\n", index,
buddha_num_hwifs == BUDDHA_NUM_HWIFS ? "Buddha" :
"Catweasel");
}
}
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