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 */
30int 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 */
39int __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 */
70void __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