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 */
25static 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
85extern struct pci_ops mace_pci_ops;
86#ifdef CONFIG_64BIT
87static 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};
93static 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
101static 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};
107static 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
115static 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	.iommu		= 0,
120	.mem_offset	= MACE_PCI_MEM_OFFSET,
121	.io_offset	= 0,
122};
123
124static 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	iomem_resource = mace_pci_mem_resource;
139	ioport_resource = mace_pci_io_resource;
140
141	register_pci_controller(&mace_pci_controller);
142
143	return 0;
144}
145
146arch_initcall(mace_init);
147