Linux Kernel  3.7.1
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tc.c
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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 }
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