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| 1 | /* |
| 2 | * Amiga Buddha, Catweasel and X-Surf IDE Driver |
| 3 | * |
| 4 | * Copyright (C) 1997, 2001 by Geert Uytterhoeven and others |
| 5 | * |
| 6 | * This driver was written based on the specifications in README.buddha and |
| 7 | * the X-Surf info from Inside_XSurf.txt available at |
| 8 | * http://www.jschoenfeld.com |
| 9 | * |
| 10 | * This file is subject to the terms and conditions of the GNU General Public |
| 11 | * License. See the file COPYING in the main directory of this archive for |
| 12 | * more details. |
| 13 | * |
| 14 | * TODO: |
| 15 | * - test it :-) |
| 16 | * - tune the timings using the speed-register |
| 17 | */ |
| 18 | |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/mm.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/blkdev.h> |
| 23 | #include <linux/zorro.h> |
| 24 | #include <linux/ide.h> |
| 25 | #include <linux/init.h> |
| 26 | #include <linux/module.h> |
| 27 | |
| 28 | #include <asm/amigahw.h> |
| 29 | #include <asm/amigaints.h> |
| 30 | |
| 31 | |
| 32 | /* |
| 33 | * The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2 |
| 34 | */ |
| 35 | |
| 36 | #define BUDDHA_NUM_HWIFS 2 |
| 37 | #define CATWEASEL_NUM_HWIFS 3 |
| 38 | #define XSURF_NUM_HWIFS 2 |
| 39 | |
| 40 | #define MAX_NUM_HWIFS 3 |
| 41 | |
| 42 | /* |
| 43 | * Bases of the IDE interfaces (relative to the board address) |
| 44 | */ |
| 45 | |
| 46 | #define BUDDHA_BASE1 0x800 |
| 47 | #define BUDDHA_BASE2 0xa00 |
| 48 | #define BUDDHA_BASE3 0xc00 |
| 49 | |
| 50 | #define XSURF_BASE1 0xb000 /* 2.5" Interface */ |
| 51 | #define XSURF_BASE2 0xd000 /* 3.5" Interface */ |
| 52 | |
| 53 | static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = { |
| 54 | BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3 |
| 55 | }; |
| 56 | |
| 57 | static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = { |
| 58 | XSURF_BASE1, XSURF_BASE2 |
| 59 | }; |
| 60 | |
| 61 | /* |
| 62 | * Offsets from one of the above bases |
| 63 | */ |
| 64 | |
| 65 | #define BUDDHA_CONTROL 0x11a |
| 66 | |
| 67 | /* |
| 68 | * Other registers |
| 69 | */ |
| 70 | |
| 71 | #define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */ |
| 72 | #define BUDDHA_IRQ2 0xf40 /* interrupt */ |
| 73 | #define BUDDHA_IRQ3 0xf80 |
| 74 | |
| 75 | #define XSURF_IRQ1 0x7e |
| 76 | #define XSURF_IRQ2 0x7e |
| 77 | |
| 78 | static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = { |
| 79 | BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3 |
| 80 | }; |
| 81 | |
| 82 | static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = { |
| 83 | XSURF_IRQ1, XSURF_IRQ2 |
| 84 | }; |
| 85 | |
| 86 | #define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */ |
| 87 | |
| 88 | |
| 89 | /* |
| 90 | * Board information |
| 91 | */ |
| 92 | |
| 93 | typedef enum BuddhaType_Enum { |
| 94 | BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF |
| 95 | } BuddhaType; |
| 96 | |
| 97 | static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" }; |
| 98 | |
| 99 | /* |
| 100 | * Check and acknowledge the interrupt status |
| 101 | */ |
| 102 | |
| 103 | static int buddha_test_irq(ide_hwif_t *hwif) |
| 104 | { |
| 105 | unsigned char ch; |
| 106 | |
| 107 | ch = z_readb(hwif->io_ports.irq_addr); |
| 108 | if (!(ch & 0x80)) |
| 109 | return 0; |
| 110 | return 1; |
| 111 | } |
| 112 | |
| 113 | static void xsurf_clear_irq(ide_drive_t *drive) |
| 114 | { |
| 115 | /* |
| 116 | * X-Surf needs 0 written to IRQ register to ensure ISA bit A11 stays at 0 |
| 117 | */ |
| 118 | z_writeb(0, drive->hwif->io_ports.irq_addr); |
| 119 | } |
| 120 | |
| 121 | static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base, |
| 122 | unsigned long ctl, unsigned long irq_port) |
| 123 | { |
| 124 | int i; |
| 125 | |
| 126 | memset(hw, 0, sizeof(*hw)); |
| 127 | |
| 128 | hw->io_ports.data_addr = base; |
| 129 | |
| 130 | for (i = 1; i < 8; i++) |
| 131 | hw->io_ports_array[i] = base + 2 + i * 4; |
| 132 | |
| 133 | hw->io_ports.ctl_addr = ctl; |
| 134 | hw->io_ports.irq_addr = irq_port; |
| 135 | |
| 136 | hw->irq = IRQ_AMIGA_PORTS; |
| 137 | } |
| 138 | |
| 139 | static const struct ide_port_ops buddha_port_ops = { |
| 140 | .test_irq = buddha_test_irq, |
| 141 | }; |
| 142 | |
| 143 | static const struct ide_port_ops xsurf_port_ops = { |
| 144 | .clear_irq = xsurf_clear_irq, |
| 145 | .test_irq = buddha_test_irq, |
| 146 | }; |
| 147 | |
| 148 | static const struct ide_port_info buddha_port_info = { |
| 149 | .port_ops = &buddha_port_ops, |
| 150 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, |
| 151 | .irq_flags = IRQF_SHARED, |
| 152 | .chipset = ide_generic, |
| 153 | }; |
| 154 | |
| 155 | /* |
| 156 | * Probe for a Buddha or Catweasel IDE interface |
| 157 | */ |
| 158 | |
| 159 | static int __init buddha_init(void) |
| 160 | { |
| 161 | struct zorro_dev *z = NULL; |
| 162 | u_long buddha_board = 0; |
| 163 | BuddhaType type; |
| 164 | int buddha_num_hwifs, i; |
| 165 | |
| 166 | while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { |
| 167 | unsigned long board; |
| 168 | struct ide_hw hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS]; |
| 169 | struct ide_port_info d = buddha_port_info; |
| 170 | |
| 171 | if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) { |
| 172 | buddha_num_hwifs = BUDDHA_NUM_HWIFS; |
| 173 | type=BOARD_BUDDHA; |
| 174 | } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) { |
| 175 | buddha_num_hwifs = CATWEASEL_NUM_HWIFS; |
| 176 | type=BOARD_CATWEASEL; |
| 177 | } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) { |
| 178 | buddha_num_hwifs = XSURF_NUM_HWIFS; |
| 179 | type=BOARD_XSURF; |
| 180 | d.port_ops = &xsurf_port_ops; |
| 181 | } else |
| 182 | continue; |
| 183 | |
| 184 | board = z->resource.start; |
| 185 | |
| 186 | if(type != BOARD_XSURF) { |
| 187 | if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE")) |
| 188 | continue; |
| 189 | } else { |
| 190 | if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE")) |
| 191 | continue; |
| 192 | if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE")) |
| 193 | goto fail_base2; |
| 194 | if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) { |
| 195 | release_mem_region(board+XSURF_BASE2, 0x1000); |
| 196 | fail_base2: |
| 197 | release_mem_region(board+XSURF_BASE1, 0x1000); |
| 198 | continue; |
| 199 | } |
| 200 | } |
| 201 | buddha_board = ZTWO_VADDR(board); |
| 202 | |
| 203 | /* write to BUDDHA_IRQ_MR to enable the board IRQ */ |
| 204 | /* X-Surf doesn't have this. IRQs are always on */ |
| 205 | if (type != BOARD_XSURF) |
| 206 | z_writeb(0, buddha_board+BUDDHA_IRQ_MR); |
| 207 | |
| 208 | printk(KERN_INFO "ide: %s IDE controller\n", |
| 209 | buddha_board_name[type]); |
| 210 | |
| 211 | for (i = 0; i < buddha_num_hwifs; i++) { |
| 212 | unsigned long base, ctl, irq_port; |
| 213 | |
| 214 | if (type != BOARD_XSURF) { |
| 215 | base = buddha_board + buddha_bases[i]; |
| 216 | ctl = base + BUDDHA_CONTROL; |
| 217 | irq_port = buddha_board + buddha_irqports[i]; |
| 218 | } else { |
| 219 | base = buddha_board + xsurf_bases[i]; |
| 220 | /* X-Surf has no CS1* (Control/AltStat) */ |
| 221 | ctl = 0; |
| 222 | irq_port = buddha_board + xsurf_irqports[i]; |
| 223 | } |
| 224 | |
| 225 | buddha_setup_ports(&hw[i], base, ctl, irq_port); |
| 226 | |
| 227 | hws[i] = &hw[i]; |
| 228 | } |
| 229 | |
| 230 | ide_host_add(&d, hws, i, NULL); |
| 231 | } |
| 232 | |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | module_init(buddha_init); |
| 237 | |
| 238 | MODULE_LICENSE("GPL"); |
| 239 |
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