Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 47 | static 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) |
| 79 | int ide_doubler = 0; /* support IDE doublers? */ |
| 80 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ |
| 81 | |
| 82 | |
| 83 | /* |
| 84 | * Check and acknowledge the interrupt status |
| 85 | */ |
| 86 | |
| 87 | static 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 | |
| 97 | static 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 | |
| 113 | void __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 | |
| 130 | found: |
| 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 | * FIXME: we now have selectable modes between mmio v/s iomio |
| 150 | */ |
| 151 | |
| 152 | phys_base += i*GAYLE_NEXT_PORT; |
| 153 | |
| 154 | res_start = ((unsigned long)phys_base) & ~(GAYLE_NEXT_PORT-1); |
| 155 | res_n = GAYLE_IDEREG_SIZE; |
| 156 | |
| 157 | if (!request_mem_region(res_start, res_n, "IDE")) |
| 158 | continue; |
| 159 | |
| 160 | base = (unsigned long)ZTWO_VADDR(phys_base); |
| 161 | ctrlport = GAYLE_HAS_CONTROL_REG ? (base + GAYLE_CONTROL) : 0; |
| 162 | |
| 163 | ide_setup_ports(&hw, base, gayle_offsets, |
| 164 | ctrlport, irqport, ack_intr, |
| 165 | // &gayle_iops, |
| 166 | IRQ_AMIGA_PORTS); |
| 167 | |
Bartlomiej Zolnierkiewicz | 869c56e | 2007-05-10 00:01:10 +0200 | [diff] [blame] | 168 | index = ide_register_hw(&hw, 1, &hwif); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | if (index != -1) { |
Bartlomiej Zolnierkiewicz | 2ad1e55 | 2007-02-17 02:40:25 +0100 | [diff] [blame] | 170 | hwif->mmio = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | switch (i) { |
| 172 | case 0: |
| 173 | printk("ide%d: Gayle IDE interface (A%d style)\n", index, |
| 174 | a4000 ? 4000 : 1200); |
| 175 | break; |
| 176 | #ifdef CONFIG_BLK_DEV_IDEDOUBLER |
| 177 | case 1: |
| 178 | printk("ide%d: IDE doubler\n", index); |
| 179 | break; |
| 180 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ |
| 181 | } |
| 182 | } else |
| 183 | release_mem_region(res_start, res_n); |
| 184 | } |
| 185 | } |