1/* 2 * linux/drivers/ide/legacy/gayle.c -- Amiga Gayle IDE Driver 3 * 4 * Created 9 Jul 1997 by Geert Uytterhoeven 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive for 8 * more details. 9 */ 10 11#include <linux/types.h> 12#include <linux/mm.h> 13#include <linux/interrupt.h> 14#include <linux/blkdev.h> 15#include <linux/hdreg.h> 16#include <linux/ide.h> 17#include <linux/init.h> 18#include <linux/zorro.h> 19 20#include <asm/setup.h> 21#include <asm/amigahw.h> 22#include <asm/amigaints.h> 23#include <asm/amigayle.h> 24 25 26 /* 27 * Bases of the IDE interfaces 28 */ 29 30#define GAYLE_BASE_4000 0xdd2020 /* A4000/A4000T */ 31#define GAYLE_BASE_1200 0xda0000 /* A1200/A600 and E-Matrix 530 */ 32 33 /* 34 * Offsets from one of the above bases 35 */ 36 37#define GAYLE_DATA 0x00 38#define GAYLE_ERROR 0x06 /* see err-bits */ 39#define GAYLE_NSECTOR 0x0a /* nr of sectors to read/write */ 40#define GAYLE_SECTOR 0x0e /* starting sector */ 41#define GAYLE_LCYL 0x12 /* starting cylinder */ 42#define GAYLE_HCYL 0x16 /* high byte of starting cyl */ 43#define GAYLE_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */ 44#define GAYLE_STATUS 0x1e /* see status-bits */ 45#define GAYLE_CONTROL 0x101a 46 47static int gayle_offsets[IDE_NR_PORTS] __initdata = { 48 GAYLE_DATA, GAYLE_ERROR, GAYLE_NSECTOR, GAYLE_SECTOR, GAYLE_LCYL, 49 GAYLE_HCYL, GAYLE_SELECT, GAYLE_STATUS, -1, -1 50}; 51 52 53 /* 54 * These are at different offsets from the base 55 */ 56 57#define GAYLE_IRQ_4000 0xdd3020 /* MSB = 1, Harddisk is source of */ 58#define GAYLE_IRQ_1200 0xda9000 /* interrupt */ 59 60 61 /* 62 * Offset of the secondary port for IDE doublers 63 * Note that GAYLE_CONTROL is NOT available then! 64 */ 65 66#define GAYLE_NEXT_PORT 0x1000 67 68#ifndef CONFIG_BLK_DEV_IDEDOUBLER 69#define GAYLE_NUM_HWIFS 1 70#define GAYLE_NUM_PROBE_HWIFS GAYLE_NUM_HWIFS 71#define GAYLE_HAS_CONTROL_REG 1 72#define GAYLE_IDEREG_SIZE 0x2000 73#else /* CONFIG_BLK_DEV_IDEDOUBLER */ 74#define GAYLE_NUM_HWIFS 2 75#define GAYLE_NUM_PROBE_HWIFS (ide_doubler ? GAYLE_NUM_HWIFS : \ 76 GAYLE_NUM_HWIFS-1) 77#define GAYLE_HAS_CONTROL_REG (!ide_doubler) 78#define GAYLE_IDEREG_SIZE (ide_doubler ? 0x1000 : 0x2000) 79int ide_doubler = 0; /* support IDE doublers? */ 80#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 81 82 83 /* 84 * Check and acknowledge the interrupt status 85 */ 86 87static int gayle_ack_intr_a4000(ide_hwif_t *hwif) 88{ 89 unsigned char ch; 90 91 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]); 92 if (!(ch & GAYLE_IRQ_IDE)) 93 return 0; 94 return 1; 95} 96 97static int gayle_ack_intr_a1200(ide_hwif_t *hwif) 98{ 99 unsigned char ch; 100 101 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]); 102 if (!(ch & GAYLE_IRQ_IDE)) 103 return 0; 104 (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]); 105 z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]); 106 return 1; 107} 108 109 /* 110 * Probe for a Gayle IDE interface (and optionally for an IDE doubler) 111 */ 112 113void __init gayle_init(void) 114{ 115 int a4000, i; 116 117 if (!MACH_IS_AMIGA) 118 return; 119 120 if ((a4000 = AMIGAHW_PRESENT(A4000_IDE)) || AMIGAHW_PRESENT(A1200_IDE)) 121 goto found; 122 123#ifdef CONFIG_ZORRO 124 if (zorro_find_device(ZORRO_PROD_MTEC_VIPER_MK_V_E_MATRIX_530_SCSI_IDE, 125 NULL)) 126 goto found; 127#endif 128 return; 129 130found: 131 for (i = 0; i < GAYLE_NUM_PROBE_HWIFS; i++) { 132 unsigned long base, ctrlport, irqport; 133 ide_ack_intr_t *ack_intr; 134 hw_regs_t hw; 135 ide_hwif_t *hwif; 136 int index; 137 unsigned long phys_base, res_start, res_n; 138 139 if (a4000) { 140 phys_base = GAYLE_BASE_4000; 141 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_4000); 142 ack_intr = gayle_ack_intr_a4000; 143 } else { 144 phys_base = GAYLE_BASE_1200; 145 irqport = (unsigned long)ZTWO_VADDR(GAYLE_IRQ_1200); 146 ack_intr = gayle_ack_intr_a1200; 147 } 148 149 phys_base += i*GAYLE_NEXT_PORT; 150 151 res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); 152 res_n = GAYLE_IDEREG_SIZE; 153 154 if (!request_mem_region(res_start, res_n, "IDE")) 155 continue; 156 157 base = (unsigned long)ZTWO_VADDR(phys_base); 158 ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; 159 160 ide_setup_ports(&hw, base, gayle_offsets, 161 ctrlport, irqport, ack_intr, 162// &gayle_iops, 163 IRQ_AMIGA_PORTS); 164 165 index = ide_register_hw(&hw, 1, &hwif); 166 if (index != -1) { 167 hwif->mmio = 1; 168 switch (i) { 169 case 0: 170 printk("ide%d: Gayle IDE interface (A%d style)\n", index, 171 a4000 ? 4000 : 1200); 172 break; 173#ifdef CONFIG_BLK_DEV_IDEDOUBLER 174 case 1: 175 printk("ide%d: IDE doubler\n", index); 176 break; 177#endif /* CONFIG_BLK_DEV_IDEDOUBLER */ 178 } 179 } else 180 release_mem_region(res_start, res_n); 181 } 182} 183