| Maciej W. Rozycki | 33cf45b | 2007-02-05 16:28:26 -0800 | [diff] [blame] | 1 | /* |
| 2 | * TURBOchannel architecture calls. |
| 3 | * |
| 4 | * Copyright (c) Harald Koerfgen, 1998 |
| 5 | * Copyright (c) 2001, 2003, 2005, 2006 Maciej W. Rozycki |
| 6 | * Copyright (c) 2005 James Simmons |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU |
| 9 | * General Public License. See the file "COPYING" in the main |
| 10 | * directory of this archive for more details. |
| 11 | */ |
| 12 | #include <linux/compiler.h> |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/string.h> |
| 16 | #include <linux/tc.h> |
| 17 | #include <linux/types.h> |
| 18 | |
| 19 | #include <asm/addrspace.h> |
| 20 | #include <asm/bootinfo.h> |
| 21 | #include <asm/paccess.h> |
| 22 | |
| 23 | #include <asm/dec/interrupts.h> |
| 24 | #include <asm/dec/prom.h> |
| 25 | #include <asm/dec/system.h> |
| 26 | |
| 27 | /* |
| 28 | * Protected read byte from TURBOchannel slot space. |
| 29 | */ |
| 30 | int tc_preadb(u8 *valp, void __iomem *addr) |
| 31 | { |
| 32 | return get_dbe(*valp, (u8 *)addr); |
| 33 | } |
| 34 | |
| 35 | /* |
| 36 | * Get TURBOchannel bus information as specified by the spec, plus |
| 37 | * the slot space base address and the number of slots. |
| 38 | */ |
| 39 | int __init tc_bus_get_info(struct tc_bus *tbus) |
| 40 | { |
| 41 | if (!dec_tc_bus) |
| 42 | return -ENXIO; |
| 43 | |
| 44 | memcpy(&tbus->info, rex_gettcinfo(), sizeof(tbus->info)); |
| 45 | tbus->slot_base = CPHYSADDR((long)rex_slot_address(0)); |
| 46 | |
| 47 | switch (mips_machtype) { |
| 48 | case MACH_DS5000_200: |
| 49 | tbus->num_tcslots = 7; |
| 50 | break; |
| 51 | case MACH_DS5000_2X0: |
| 52 | case MACH_DS5900: |
| 53 | tbus->ext_slot_base = 0x20000000; |
| 54 | tbus->ext_slot_size = 0x20000000; |
| 55 | /* fall through */ |
| 56 | case MACH_DS5000_1XX: |
| 57 | tbus->num_tcslots = 3; |
| 58 | break; |
| 59 | case MACH_DS5000_XX: |
| 60 | tbus->num_tcslots = 2; |
| 61 | default: |
| 62 | break; |
| 63 | } |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * Get the IRQ for the specified slot. |
| 69 | */ |
| 70 | void __init tc_device_get_irq(struct tc_dev *tdev) |
| 71 | { |
| 72 | switch (tdev->slot) { |
| 73 | case 0: |
| 74 | tdev->interrupt = dec_interrupt[DEC_IRQ_TC0]; |
| 75 | break; |
| 76 | case 1: |
| 77 | tdev->interrupt = dec_interrupt[DEC_IRQ_TC1]; |
| 78 | break; |
| 79 | case 2: |
| 80 | tdev->interrupt = dec_interrupt[DEC_IRQ_TC2]; |
| 81 | break; |
| 82 | /* |
| 83 | * Yuck! DS5000/200 onboard devices |
| 84 | */ |
| 85 | case 5: |
| 86 | tdev->interrupt = dec_interrupt[DEC_IRQ_TC5]; |
| 87 | break; |
| 88 | case 6: |
| 89 | tdev->interrupt = dec_interrupt[DEC_IRQ_TC6]; |
| 90 | break; |
| 91 | default: |
| 92 | tdev->interrupt = -1; |
| 93 | break; |
| 94 | } |
| 95 | } |