1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2000, 2001 Keith M Wesolowski
7 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
8 */
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/interrupt.h>
12 #include <linux/pci.h>
13 #include <linux/types.h>
14 #include <asm/ip32/mace.h>
15 #include <asm/ip32/ip32_ints.h>
16
17 #undef DEBUG_MACE_PCI
18
19 /*
20 * Handle errors from the bridge. This includes master and target aborts,
21 * various command and address errors, and the interrupt test. This gets
22 * registered on the bridge error irq. It's conceivable that some of these
23 * conditions warrant a panic. Anybody care to say which ones?
24 */
25 static irqreturn_t macepci_error(int irq, void *dev)
26 {
27 char s;
28 unsigned int flags = mace->pci.error;
29 unsigned int addr = mace->pci.error_addr;
30
31 if (flags & MACEPCI_ERROR_MEMORY_ADDR)
32 s = 'M';
33 else if (flags & MACEPCI_ERROR_CONFIG_ADDR)
34 s = 'C';
35 else
36 s = 'X';
37
38 if (flags & MACEPCI_ERROR_MASTER_ABORT) {
39 printk("MACEPCI: Master abort at 0x%08x (%c)\n", addr, s);
40 flags &= ~MACEPCI_ERROR_MASTER_ABORT;
41 }
42 if (flags & MACEPCI_ERROR_TARGET_ABORT) {
43 printk("MACEPCI: Target abort at 0x%08x (%c)\n", addr, s);
44 flags &= ~MACEPCI_ERROR_TARGET_ABORT;
45 }
46 if (flags & MACEPCI_ERROR_DATA_PARITY_ERR) {
47 printk("MACEPCI: Data parity error at 0x%08x (%c)\n", addr, s);
48 flags &= ~MACEPCI_ERROR_DATA_PARITY_ERR;
49 }
50 if (flags & MACEPCI_ERROR_RETRY_ERR) {
51 printk("MACEPCI: Retry error at 0x%08x (%c)\n", addr, s);
52 flags &= ~MACEPCI_ERROR_RETRY_ERR;
53 }
54 if (flags & MACEPCI_ERROR_ILLEGAL_CMD) {
55 printk("MACEPCI: Illegal command at 0x%08x (%c)\n", addr, s);
56 flags &= ~MACEPCI_ERROR_ILLEGAL_CMD;
57 }
58 if (flags & MACEPCI_ERROR_SYSTEM_ERR) {
59 printk("MACEPCI: System error at 0x%08x (%c)\n", addr, s);
60 flags &= ~MACEPCI_ERROR_SYSTEM_ERR;
61 }
62 if (flags & MACEPCI_ERROR_PARITY_ERR) {
63 printk("MACEPCI: Parity error at 0x%08x (%c)\n", addr, s);
64 flags &= ~MACEPCI_ERROR_PARITY_ERR;
65 }
66 if (flags & MACEPCI_ERROR_OVERRUN) {
67 printk("MACEPCI: Overrun error at 0x%08x (%c)\n", addr, s);
68 flags &= ~MACEPCI_ERROR_OVERRUN;
69 }
70 if (flags & MACEPCI_ERROR_SIG_TABORT) {
71 printk("MACEPCI: Signaled target abort (clearing)\n");
72 flags &= ~MACEPCI_ERROR_SIG_TABORT;
73 }
74 if (flags & MACEPCI_ERROR_INTERRUPT_TEST) {
75 printk("MACEPCI: Interrupt test triggered (clearing)\n");
76 flags &= ~MACEPCI_ERROR_INTERRUPT_TEST;
77 }
78
79 mace->pci.error = flags;
80
81 return IRQ_HANDLED;
82 }
83
84
85 extern struct pci_ops mace_pci_ops;
86 #ifdef CONFIG_64BIT
87 static struct resource mace_pci_mem_resource = {
88 .name = "SGI O2 PCI MEM",
89 .start = MACEPCI_HI_MEMORY,
90 .end = 0x2FFFFFFFFUL,
91 .flags = IORESOURCE_MEM,
92 };
93 static struct resource mace_pci_io_resource = {
94 .name = "SGI O2 PCI IO",
95 .start = 0x00000000UL,
96 .end = 0xffffffffUL,
97 .flags = IORESOURCE_IO,
98 };
99 #define MACE_PCI_MEM_OFFSET 0x200000000
100 #else
101 static struct resource mace_pci_mem_resource = {
102 .name = "SGI O2 PCI MEM",
103 .start = MACEPCI_LOW_MEMORY,
104 .end = MACEPCI_LOW_MEMORY + 0x2000000 - 1,
105 .flags = IORESOURCE_MEM,
106 };
107 static struct resource mace_pci_io_resource = {
108 .name = "SGI O2 PCI IO",
109 .start = 0x00000000,
110 .end = 0xFFFFFFFF,
111 .flags = IORESOURCE_IO,
112 };
113 #define MACE_PCI_MEM_OFFSET (MACEPCI_LOW_MEMORY - 0x80000000)
114 #endif
115 static struct pci_controller mace_pci_controller = {
116 .pci_ops = &mace_pci_ops,
117 .mem_resource = &mace_pci_mem_resource,
118 .io_resource = &mace_pci_io_resource,
119 .mem_offset = MACE_PCI_MEM_OFFSET,
120 .io_offset = 0,
121 .io_map_base = CKSEG1ADDR(MACEPCI_LOW_IO),
122 };
123
124 static int __init mace_init(void)
125 {
126 PCIBIOS_MIN_IO = 0x1000;
127
128 /* Clear any outstanding errors and enable interrupts */
129 mace->pci.error_addr = 0;
130 mace->pci.error = 0;
131 mace->pci.control = 0xff008500;
132
133 printk("MACE PCI rev %d\n", mace->pci.rev);
134
135 BUG_ON(request_irq(MACE_PCI_BRIDGE_IRQ, macepci_error, 0,
136 "MACE PCI error", NULL));
137
138 /* extend memory resources */
139 iomem_resource.end = mace_pci_mem_resource.end;
140 ioport_resource = mace_pci_io_resource;
141
142 register_pci_controller(&mace_pci_controller);
143
144 return 0;
145 }
146
147 arch_initcall(mace_init);
148
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.