1/*
2 * arch/mips/pci/fixup-vr4133.c
3 *
4 * The NEC CMB-VR4133 Board specific PCI fixups.
5 *
6 * Author: Yoichi Yuasa <yyuasa@mvista.com, or source@mvista.com> and
7 *         Alex Sapkov <asapkov@ru.mvista.com>
8 *
9 * 2003-2004 (c) MontaVista, Software, Inc. This file is licensed under
10 * the terms of the GNU General Public License version 2. This program
11 * is licensed "as is" without any warranty of any kind, whether express
12 * or implied.
13 *
14 * Modified for support in 2.6
15 * Author: Manish Lachwani (mlachwani@mvista.com)
16 *
17 */
18#include <linux/init.h>
19#include <linux/pci.h>
20#include <linux/kernel.h>
21
22#include <asm/io.h>
23#include <asm/i8259.h>
24#include <asm/vr41xx/cmbvr4133.h>
25
26extern int vr4133_rockhopper;
27extern void ali_m1535plus_init(struct pci_dev *dev);
28extern void ali_m5229_init(struct pci_dev *dev);
29
30/* Do platform specific device initialization at pci_enable_device() time */
31int pcibios_plat_dev_init(struct pci_dev *dev)
32{
33	/*
34	 * We have to reset AMD PCnet adapter on Rockhopper since
35	 * PMON leaves it enabled and generating interrupts. This leads
36	 * to a lock if some PCI device driver later enables the IRQ line
37	 * shared with PCnet and there is no AMD PCnet driver to catch its
38	 * interrupts.
39	 */
40#ifdef CONFIG_ROCKHOPPER
41	if (dev->vendor == PCI_VENDOR_ID_AMD &&
42		dev->device == PCI_DEVICE_ID_AMD_LANCE) {
43		inl(pci_resource_start(dev, 0) + 0x18);
44	}
45#endif
46
47	/*
48	 * we have to open the bridges' windows down to 0 because otherwise
49	 * we cannot access ISA south bridge I/O registers that get mapped from
50	 * 0. for example, 8259 PIC would be unaccessible without that
51	 */
52	if(dev->vendor == PCI_VENDOR_ID_INTEL && dev->device == PCI_DEVICE_ID_INTEL_S21152BB) {
53		pci_write_config_byte(dev, PCI_IO_BASE, 0);
54		if(dev->bus->number == 0) {
55			pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 0);
56		} else {
57			pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 1);
58		}
59	}
60
61	return 0;
62}
63
64/*
65 * M1535 IRQ mapping
66 * Feel free to change this, although it shouldn't be needed
67 */
68#define M1535_IRQ_INTA  7
69#define M1535_IRQ_INTB  9
70#define M1535_IRQ_INTC  10
71#define M1535_IRQ_INTD  11
72
73#define M1535_IRQ_USB   9
74#define M1535_IRQ_IDE   14
75#define M1535_IRQ_IDE2  15
76#define M1535_IRQ_PS2   12
77#define M1535_IRQ_RTC   8
78#define M1535_IRQ_FDC   6
79#define M1535_IRQ_AUDIO 5
80#define M1535_IRQ_COM1  4
81#define M1535_IRQ_COM2  4
82#define M1535_IRQ_IRDA  3
83#define M1535_IRQ_KBD   1
84#define M1535_IRQ_TMR   0
85
86/* Rockhopper "slots" assignment; this is hard-coded ... */
87#define ROCKHOPPER_M5451_SLOT  1
88#define ROCKHOPPER_M1535_SLOT  2
89#define ROCKHOPPER_M5229_SLOT  11
90#define ROCKHOPPER_M5237_SLOT  15
91#define ROCKHOPPER_PMU_SLOT    12
92/* ... and hard-wired. */
93#define ROCKHOPPER_PCI1_SLOT   3
94#define ROCKHOPPER_PCI2_SLOT   4
95#define ROCKHOPPER_PCI3_SLOT   5
96#define ROCKHOPPER_PCI4_SLOT   6
97#define ROCKHOPPER_PCNET_SLOT  1
98
99#define M1535_IRQ_MASK(n) (1 << (n))
100
101#define M1535_IRQ_EDGE  (M1535_IRQ_MASK(M1535_IRQ_TMR)  | \
102                         M1535_IRQ_MASK(M1535_IRQ_KBD)  | \
103                         M1535_IRQ_MASK(M1535_IRQ_COM1) | \
104                         M1535_IRQ_MASK(M1535_IRQ_COM2) | \
105                         M1535_IRQ_MASK(M1535_IRQ_IRDA) | \
106                         M1535_IRQ_MASK(M1535_IRQ_RTC)  | \
107                         M1535_IRQ_MASK(M1535_IRQ_FDC)  | \
108                         M1535_IRQ_MASK(M1535_IRQ_PS2))
109
110#define M1535_IRQ_LEVEL (M1535_IRQ_MASK(M1535_IRQ_IDE)  | \
111                         M1535_IRQ_MASK(M1535_IRQ_USB)  | \
112                         M1535_IRQ_MASK(M1535_IRQ_INTA) | \
113                         M1535_IRQ_MASK(M1535_IRQ_INTB) | \
114                         M1535_IRQ_MASK(M1535_IRQ_INTC) | \
115                         M1535_IRQ_MASK(M1535_IRQ_INTD))
116
117struct irq_map_entry {
118	u16 bus;
119	u8 slot;
120	u8 irq;
121};
122static struct irq_map_entry int_map[] = {
123	{1, ROCKHOPPER_M5451_SLOT, M1535_IRQ_AUDIO},	/* Audio controller */
124	{1, ROCKHOPPER_PCI1_SLOT, M1535_IRQ_INTD},	/* PCI slot #1 */
125	{1, ROCKHOPPER_PCI2_SLOT, M1535_IRQ_INTC},	/* PCI slot #2 */
126	{1, ROCKHOPPER_M5237_SLOT, M1535_IRQ_USB},	/* USB host controller */
127	{1, ROCKHOPPER_M5229_SLOT, IDE_PRIMARY_IRQ},	/* IDE controller */
128	{2, ROCKHOPPER_PCNET_SLOT, M1535_IRQ_INTD},	/* AMD Am79c973 on-board
129							   ethernet */
130	{2, ROCKHOPPER_PCI3_SLOT, M1535_IRQ_INTB},	/* PCI slot #3 */
131	{2, ROCKHOPPER_PCI4_SLOT, M1535_IRQ_INTC}	/* PCI slot #4 */
132};
133
134static int pci_intlines[] =
135    { M1535_IRQ_INTA, M1535_IRQ_INTB, M1535_IRQ_INTC, M1535_IRQ_INTD };
136
137/* Determine the Rockhopper IRQ line number for the PCI device */
138int rockhopper_get_irq(struct pci_dev *dev, u8 pin, u8 slot)
139{
140	struct pci_bus *bus;
141	int i;
142
143	bus = dev->bus;
144	if (bus == NULL)
145		return -1;
146
147	for (i = 0; i < ARRAY_SIZE(int_map); i++) {
148		if (int_map[i].bus == bus->number && int_map[i].slot == slot) {
149			int line;
150			for (line = 0; line < 4; line++)
151				if (pci_intlines[line] == int_map[i].irq)
152					break;
153			if (line < 4)
154				return pci_intlines[(line + (pin - 1)) % 4];
155			else
156				return int_map[i].irq;
157		}
158	}
159	return -1;
160}
161
162#ifdef CONFIG_ROCKHOPPER
163void i8259_init(void)
164{
165	init_i8259_irqs();
166
167	outb(0x00, 0x4d0);
168	outb(0x02, 0x4d1);	/* USB IRQ9 is level */
169}
170#endif
171
172int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
173{
174	extern int pci_probe_only;
175	pci_probe_only = 1;
176
177#ifdef CONFIG_ROCKHOPPER
178	if( dev->bus->number == 1 && vr4133_rockhopper )  {
179		if(slot == ROCKHOPPER_PCI1_SLOT || slot == ROCKHOPPER_PCI2_SLOT)
180			dev->irq = CMBVR41XX_INTA_IRQ;
181		else
182			dev->irq = rockhopper_get_irq(dev, pin, slot);
183	} else
184		dev->irq = CMBVR41XX_INTA_IRQ;
185#else
186	dev->irq = CMBVR41XX_INTA_IRQ;
187#endif
188
189	return dev->irq;
190}
191
192DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, ali_m1535plus_init);
193DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, ali_m5229_init);
194