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/*
* Amiga Gayle IDE Driver
*
* Created 9 Jul 1997 by Geert Uytterhoeven
*
* 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.
*/
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/init.h>
#include <linux/zorro.h>
#include <asm/setup.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <asm/amigayle.h>
/*
* Bases of the IDE interfaces
*/
#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
/*
* Offsets from one of the above bases
*/
#define GAYLE_CONTROL 0x101a
/*
* These are at different offsets from the base
*/
#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
/*
* Offset of the secondary port for IDE doublers
* Note that GAYLE_CONTROL is NOT available then!
*/
#define GAYLE_NEXT_PORT 0x1000
#ifndef CONFIG_BLK_DEV_IDEDOUBLER
#define GAYLE_NUM_HWIFS 1
#define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
#define GAYLE_HAS_CONTROL_REG 1
#define GAYLE_IDEREG_SIZE 0x2000
#else /* CONFIG_BLK_DEV_IDEDOUBLER */
#define GAYLE_NUM_HWIFS 2
#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
GAYLE_NUM_HWIFS-1)
#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
#define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
int ide_doubler = 0; /* support IDE doublers? */
#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
/*
* Check and acknowledge the interrupt status
*/
static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
{
unsigned char ch;
ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
if (!(ch & GAYLE_IRQ_IDE))
return 0;
return 1;
}
static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
{
unsigned char ch;
ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
if (!(ch & GAYLE_IRQ_IDE))
return 0;
(void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
return 1;
}
static void __init gayle_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[IDE_DATA_OFFSET] = base;
for (i = 1; i < 8; i++)
hw->io_ports[i] = base + 2 + i * 4;
hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
hw->irq = IRQ_AMIGA_PORTS;
hw->ack_intr = ack_intr;
}
/*
* Probe for a Gayle IDE interface (and optionally for an IDE doubler)
*/
static int __init gayle_init(void)
{
int a4000, i;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
if (!MACH_IS_AMIGA)
return -ENODEV;
if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
goto found;
#ifdef CONFIG_ZORRO
if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
NULL))
goto found;
#endif
return -ENODEV;
found:
printk(KERN_INFO "ide: Gayle IDE controller (A%d style%s)\n",
a4000 ? 4000 : 1200,
#ifdef CONFIG_BLK_DEV_IDEDOUBLER
ide_doubler ? ", IDE doubler" :
#endif
"");
for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
unsigned long base, ctrlport, irqport;
ide_ack_intr_t *ack_intr;
hw_regs_t hw;
ide_hwif_t *hwif;
unsigned long phys_base, res_start, res_n;
if (a4000) {
phys_base = GAYLE_BASE_4000;
irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
ack_intr = gayle_ack_intr_a4000;
} else {
phys_base = GAYLE_BASE_1200;
irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
ack_intr = gayle_ack_intr_a1200;
}
/*
* FIXME: we now have selectable modes between mmio v/s iomio
*/
phys_base += i*GAYLE_NEXT_PORT;
res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
res_n = GAYLE_IDEREG_SIZE;
if (!request_mem_region(res_start, res_n, "IDE"))
continue;
base = (unsigned long)ZTWO_VADDR(phys_base);
ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
gayle_setup_ports(&hw, base, ctrlport, irqport, ack_intr);
hwif = ide_find_port(base);
if (hwif) {
u8 index = hwif->index;
ide_init_port_data(hwif, index);
ide_init_port_hw(hwif, &hw);
hwif->mmio = 1;
idx[i] = index;
} else
release_mem_region(res_start, res_n);
}
ide_device_add(idx, NULL);
return 0;
}
module_init(gayle_init);
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