2005-04-16 22:20:36 +00:00
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/*
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* linux/drivers/ide/legacy/buddha.c -- Amiga Buddha, Catweasel and X-Surf IDE Driver
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*
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* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
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*
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* This driver was written based on the specifications in README.buddha and
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* the X-Surf info from Inside_XSurf.txt available at
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* http://www.jschoenfeld.com
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* TODO:
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* - test it :-)
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* - tune the timings using the speed-register
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*/
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/blkdev.h>
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#include <linux/hdreg.h>
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#include <linux/zorro.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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/*
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* The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
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*/
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#define BUDDHA_NUM_HWIFS 2
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#define CATWEASEL_NUM_HWIFS 3
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#define XSURF_NUM_HWIFS 2
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/*
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* Bases of the IDE interfaces (relative to the board address)
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*/
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#define BUDDHA_BASE1 0x800
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#define BUDDHA_BASE2 0xa00
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#define BUDDHA_BASE3 0xc00
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#define XSURF_BASE1 0xb000 /* 2.5" Interface */
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#define XSURF_BASE2 0xd000 /* 3.5" Interface */
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static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
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BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
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};
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static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
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XSURF_BASE1, XSURF_BASE2
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};
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/*
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* Offsets from one of the above bases
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*/
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#define BUDDHA_DATA 0x00
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#define BUDDHA_ERROR 0x06 /* see err-bits */
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#define BUDDHA_NSECTOR 0x0a /* nr of sectors to read/write */
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#define BUDDHA_SECTOR 0x0e /* starting sector */
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#define BUDDHA_LCYL 0x12 /* starting cylinder */
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#define BUDDHA_HCYL 0x16 /* high byte of starting cyl */
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#define BUDDHA_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
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#define BUDDHA_STATUS 0x1e /* see status-bits */
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#define BUDDHA_CONTROL 0x11a
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#define XSURF_CONTROL -1 /* X-Surf has no CS1* (Control/AltStat) */
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static int buddha_offsets[IDE_NR_PORTS] __initdata = {
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BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
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BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL, -1
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};
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static int xsurf_offsets[IDE_NR_PORTS] __initdata = {
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BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
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BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, XSURF_CONTROL, -1
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};
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/*
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* Other registers
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*/
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#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
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#define BUDDHA_IRQ2 0xf40 /* interrupt */
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#define BUDDHA_IRQ3 0xf80
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#define XSURF_IRQ1 0x7e
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#define XSURF_IRQ2 0x7e
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static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
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BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
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};
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static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
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XSURF_IRQ1, XSURF_IRQ2
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};
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#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
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/*
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* Board information
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*/
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typedef enum BuddhaType_Enum {
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BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
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} BuddhaType;
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/*
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* Check and acknowledge the interrupt status
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*/
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static int buddha_ack_intr(ide_hwif_t *hwif)
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{
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unsigned char ch;
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ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
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if (!(ch & 0x80))
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return 0;
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return 1;
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}
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static int xsurf_ack_intr(ide_hwif_t *hwif)
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{
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unsigned char ch;
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ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
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/* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
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z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]);
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if (!(ch & 0x80))
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return 0;
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return 1;
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}
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/*
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* Probe for a Buddha or Catweasel IDE interface
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*/
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void __init buddha_init(void)
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{
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hw_regs_t hw;
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ide_hwif_t *hwif;
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int i, index;
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struct zorro_dev *z = NULL;
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u_long buddha_board = 0;
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BuddhaType type;
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int buddha_num_hwifs;
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while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
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unsigned long board;
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if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
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buddha_num_hwifs = BUDDHA_NUM_HWIFS;
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type=BOARD_BUDDHA;
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} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
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buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
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type=BOARD_CATWEASEL;
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} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
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buddha_num_hwifs = XSURF_NUM_HWIFS;
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type=BOARD_XSURF;
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} else
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continue;
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board = z->resource.start;
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/*
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* FIXME: we now have selectable mmio v/s iomio transports.
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*/
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if(type != BOARD_XSURF) {
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if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
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continue;
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} else {
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if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
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continue;
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if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
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goto fail_base2;
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if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
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release_mem_region(board+XSURF_BASE2, 0x1000);
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fail_base2:
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release_mem_region(board+XSURF_BASE1, 0x1000);
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continue;
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}
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}
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buddha_board = ZTWO_VADDR(board);
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/* write to BUDDHA_IRQ_MR to enable the board IRQ */
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/* X-Surf doesn't have this. IRQs are always on */
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if (type != BOARD_XSURF)
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z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
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for(i=0;i<buddha_num_hwifs;i++) {
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if(type != BOARD_XSURF) {
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ide_setup_ports(&hw, (buddha_board+buddha_bases[i]),
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buddha_offsets, 0,
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(buddha_board+buddha_irqports[i]),
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buddha_ack_intr,
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// budda_iops,
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IRQ_AMIGA_PORTS);
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} else {
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ide_setup_ports(&hw, (buddha_board+xsurf_bases[i]),
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xsurf_offsets, 0,
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(buddha_board+xsurf_irqports[i]),
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xsurf_ack_intr,
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// xsurf_iops,
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IRQ_AMIGA_PORTS);
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}
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2007-05-09 22:01:10 +00:00
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index = ide_register_hw(&hw, 1, &hwif);
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2005-04-16 22:20:36 +00:00
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if (index != -1) {
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2007-02-17 01:40:25 +00:00
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hwif->mmio = 1;
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2005-04-16 22:20:36 +00:00
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printk("ide%d: ", index);
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switch(type) {
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case BOARD_BUDDHA:
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printk("Buddha");
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break;
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case BOARD_CATWEASEL:
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printk("Catweasel");
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break;
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case BOARD_XSURF:
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printk("X-Surf");
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break;
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}
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printk(" IDE interface\n");
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}
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}
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}
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}
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