2005-04-16 18:20:36 -04:00
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/*
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* linux/drivers/ide/legacy/gayle.c -- Amiga Gayle IDE Driver
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*
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* Created 9 Jul 1997 by Geert Uytterhoeven
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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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#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/ide.h>
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#include <linux/init.h>
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#include <linux/zorro.h>
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#include <asm/setup.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <asm/amigayle.h>
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/*
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* Bases of the IDE interfaces
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*/
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#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */
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#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */
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/*
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* Offsets from one of the above bases
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*/
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#define GAYLE_DATA 0x00
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#define GAYLE_ERROR 0x06 /* see err-bits */
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#define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */
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#define GAYLE_SECTOR 0x0e /* starting sector */
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#define GAYLE_LCYL 0x12 /* starting cylinder */
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#define GAYLE_HCYL 0x16 /* high byte of starting cyl */
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#define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
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#define GAYLE_STATUS 0x1e /* see status-bits */
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#define GAYLE_CONTROL 0x101a
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static int gayle_offsets[IDE_NR_PORTS] __initdata = {
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GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL,
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GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1
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};
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/*
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* These are at different offsets from the base
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*/
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#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */
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#define GAYLE_IRQ_1200 0xda9000 /* interrupt */
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/*
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* Offset of the secondary port for IDE doublers
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* Note that GAYLE_CONTROL is NOT available then!
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*/
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#define GAYLE_NEXT_PORT 0x1000
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#ifndef CONFIG_BLK_DEV_IDEDOUBLER
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#define GAYLE_NUM_HWIFS 1
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#define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS
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#define GAYLE_HAS_CONTROL_REG 1
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#define GAYLE_IDEREG_SIZE 0x2000
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#else /* CONFIG_BLK_DEV_IDEDOUBLER */
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#define GAYLE_NUM_HWIFS 2
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#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \
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GAYLE_NUM_HWIFS-1)
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#define GAYLE_HAS_CONTROL_REG (!ide_doubler)
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#define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000)
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int ide_doubler = 0; /* support IDE doublers? */
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#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
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/*
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* Check and acknowledge the interrupt status
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*/
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static int gayle_ack_intr_a4000(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 & GAYLE_IRQ_IDE))
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return 0;
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return 1;
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}
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static int gayle_ack_intr_a1200(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 & GAYLE_IRQ_IDE))
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return 0;
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(void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
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z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
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return 1;
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}
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/*
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* Probe for a Gayle IDE interface (and optionally for an IDE doubler)
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*/
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void __init gayle_init(void)
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{
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int a4000, i;
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if (!MACH_IS_AMIGA)
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return;
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if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE))
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goto found;
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#ifdef CONFIG_ZORRO
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if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE,
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NULL))
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goto found;
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#endif
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return;
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found:
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for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) {
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unsigned long base, ctrlport, irqport;
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ide_ack_intr_t *ack_intr;
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hw_regs_t hw;
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ide_hwif_t *hwif;
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int index;
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unsigned long phys_base, res_start, res_n;
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if (a4000) {
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phys_base = GAYLE_BASE_4000;
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irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000);
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ack_intr = gayle_ack_intr_a4000;
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} else {
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phys_base = GAYLE_BASE_1200;
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irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200);
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ack_intr = gayle_ack_intr_a1200;
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}
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/*
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* FIXME: we now have selectable modes between mmio v/s iomio
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*/
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phys_base += i*GAYLE_NEXT_PORT;
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res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1);
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res_n = GAYLE_IDEREG_SIZE;
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if (!request_mem_region(res_start, res_n, "IDE"))
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continue;
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base = (unsigned long)ZTWO_VADDR(phys_base);
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ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0;
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ide_setup_ports(&hw, base, gayle_offsets,
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ctrlport, irqport, ack_intr,
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// &gayle_iops,
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IRQ_AMIGA_PORTS);
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2007-05-09 18:01:10 -04:00
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index = ide_register_hw(&hw, 1, &hwif);
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2005-04-16 18:20:36 -04:00
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if (index != -1) {
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2007-02-16 20:40:25 -05:00
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hwif->mmio = 1;
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2005-04-16 18:20:36 -04:00
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switch (i) {
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case 0:
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printk("ide%d: Gayle IDE interface (A%d style)\n", index,
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a4000 ? 4000 : 1200);
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break;
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#ifdef CONFIG_BLK_DEV_IDEDOUBLER
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case 1:
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printk("ide%d: IDE doubler\n", index);
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break;
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#endif /* CONFIG_BLK_DEV_IDEDOUBLER */
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}
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} else
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release_mem_region(res_start, res_n);
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}
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}
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