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 | fallthrough; |
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 | } |
96 | |