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/*
* Amiga Buddha, Catweasel and X-Surf IDE Driver
*
* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
*
* This driver was written based on the specifications in README.buddha and
* the X-Surf info from Inside_XSurf.txt available at
* http://www.jschoenfeld.com
*
* 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 <linux/init.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
/*
* The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
*/
#define BUDDHA_NUM_HWIFS 2
#define CATWEASEL_NUM_HWIFS 3
#define XSURF_NUM_HWIFS 2
#define MAX_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
#define XSURF_BASE1 0xb000 /* 2.5" Interface */
#define XSURF_BASE2 0xd000 /* 3.5" Interface */
static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
};
static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
XSURF_BASE1, XSURF_BASE2
};
/*
* Offsets from one of the above bases
*/
#define BUDDHA_CONTROL 0x11a
/*
* Other registers
*/
#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
#define BUDDHA_IRQ2 0xf40 /* interrupt */
#define BUDDHA_IRQ3 0xf80
#define XSURF_IRQ1 0x7e
#define XSURF_IRQ2 0x7e
static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
};
static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
XSURF_IRQ1, XSURF_IRQ2
};
#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
/*
* Board information
*/
typedef enum BuddhaType_Enum {
BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
} BuddhaType;
static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
/*
* Check and acknowledge the interrupt status
*/
static int buddha_ack_intr(ide_hwif_t *hwif)
{
unsigned char ch;
ch = z_readb(hwif->io_ports.irq_addr);
if (!(ch & 0x80))
return 0;
return 1;
}
static int xsurf_ack_intr(ide_hwif_t *hwif)
{
unsigned char ch;
ch = z_readb(hwif->io_ports.irq_addr);
/* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
z_writeb(0, hwif->io_ports.irq_addr);
if (!(ch & 0x80))
return 0;
return 1;
}
static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
unsigned long ctl, unsigned long irq_port,
ide_ack_intr_t *ack_intr)
{
int i;
memset(hw, 0, sizeof(*hw));
hw->io_ports.data_addr = base;
for (i = 1; i < 8; i++)
hw->io_ports_array[i] = base + 2 + i * 4;
hw->io_ports.ctl_addr = ctl;
hw->io_ports.irq_addr = irq_port;
hw->irq = IRQ_AMIGA_PORTS;
hw->ack_intr = ack_intr;
hw->chipset = ide_generic;
}
/*
* Probe for a Buddha or Catweasel IDE interface
*/
static int __init buddha_init(void)
{
struct zorro_dev *z = NULL;
u_long buddha_board = 0;
BuddhaType type;
int buddha_num_hwifs, i;
while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
unsigned long board;
hw_regs_t hw[MAX_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
buddha_num_hwifs = BUDDHA_NUM_HWIFS;
type=BOARD_BUDDHA;
} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
type=BOARD_CATWEASEL;
} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
buddha_num_hwifs = XSURF_NUM_HWIFS;
type=BOARD_XSURF;
} else
continue;
board = z->resource.start;
/*
* FIXME: we now have selectable mmio v/s iomio transports.
*/
if(type != BOARD_XSURF) {
if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
continue;
} else {
if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
continue;
if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
goto fail_base2;
if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
release_mem_region(board+XSURF_BASE2, 0x1000);
fail_base2:
release_mem_region(board+XSURF_BASE1, 0x1000);
continue;
}
}
buddha_board = ZTWO_VADDR(board);
/* write to BUDDHA_IRQ_MR to enable the board IRQ */
/* X-Surf doesn't have this. IRQs are always on */
if (type != BOARD_XSURF)
z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
printk(KERN_INFO "ide: %s IDE controller\n",
buddha_board_name[type]);
for (i = 0; i < buddha_num_hwifs; i++) {
unsigned long base, ctl, irq_port;
ide_ack_intr_t *ack_intr;
if (type != BOARD_XSURF) {
base = buddha_board + buddha_bases[i];
ctl = base + BUDDHA_CONTROL;
irq_port = buddha_board + buddha_irqports[i];
ack_intr = buddha_ack_intr;
} else {
base = buddha_board + xsurf_bases[i];
/* X-Surf has no CS1* (Control/AltStat) */
ctl = 0;
irq_port = buddha_board + xsurf_irqports[i];
ack_intr = xsurf_ack_intr;
}
buddha_setup_ports(&hw[i], base, ctl, irq_port,
ack_intr);
hws[i] = &hw[i];
}
ide_host_add(NULL, hws, NULL);
}
return 0;
}
module_init(buddha_init);
MODULE_LICENSE("GPL");
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