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 */
tc_preadb(u8 * valp,void __iomem * addr)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 */
tc_bus_get_info(struct tc_bus * tbus)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 */
tc_device_get_irq(struct tc_dev * tdev)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