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1da177e4 LT |
1 | /* |
2 | * arch/mips/vr41xx/nec-cmbvr4133/pci_fixup.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/config.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/pci.h> | |
21 | ||
22 | #include <asm/io.h> | |
23 | #include <asm/vr41xx/cmbvr4133.h> | |
24 | ||
25 | extern int vr4133_rockhopper; | |
26 | extern void ali_m1535plus_init(struct pci_dev *dev); | |
27 | extern void ali_m5229_init(struct pci_dev *dev); | |
28 | ||
29 | /* Do platform specific device initialization at pci_enable_device() time */ | |
30 | int pcibios_plat_dev_init(struct pci_dev *dev) | |
31 | { | |
32 | /* | |
33 | * We have to reset AMD PCnet adapter on Rockhopper since | |
34 | * PMON leaves it enabled and generating interrupts. This leads | |
35 | * to a lock if some PCI device driver later enables the IRQ line | |
36 | * shared with PCnet and there is no AMD PCnet driver to catch its | |
37 | * interrupts. | |
38 | */ | |
39 | #ifdef CONFIG_ROCKHOPPER | |
40 | if (dev->vendor == PCI_VENDOR_ID_AMD && | |
41 | dev->device == PCI_DEVICE_ID_AMD_LANCE) { | |
42 | inl(pci_resource_start(dev, 0) + 0x18); | |
43 | } | |
44 | #endif | |
45 | ||
46 | /* | |
47 | * we have to open the bridges' windows down to 0 because otherwise | |
a3dddd56 | 48 | * we cannot access ISA south bridge I/O registers that get mapped from |
1da177e4 LT |
49 | * 0. for example, 8259 PIC would be unaccessible without that |
50 | */ | |
51 | if(dev->vendor == PCI_VENDOR_ID_INTEL && dev->device == PCI_DEVICE_ID_INTEL_S21152BB) { | |
52 | pci_write_config_byte(dev, PCI_IO_BASE, 0); | |
53 | if(dev->bus->number == 0) { | |
54 | pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 0); | |
55 | } else { | |
56 | pci_write_config_word(dev, PCI_IO_BASE_UPPER16, 1); | |
57 | } | |
58 | } | |
59 | ||
60 | return 0; | |
61 | } | |
62 | ||
63 | /* | |
64 | * M1535 IRQ mapping | |
65 | * Feel free to change this, although it shouldn't be needed | |
66 | */ | |
67 | #define M1535_IRQ_INTA 7 | |
68 | #define M1535_IRQ_INTB 9 | |
69 | #define M1535_IRQ_INTC 10 | |
70 | #define M1535_IRQ_INTD 11 | |
71 | ||
72 | #define M1535_IRQ_USB 9 | |
73 | #define M1535_IRQ_IDE 14 | |
74 | #define M1535_IRQ_IDE2 15 | |
75 | #define M1535_IRQ_PS2 12 | |
76 | #define M1535_IRQ_RTC 8 | |
77 | #define M1535_IRQ_FDC 6 | |
78 | #define M1535_IRQ_AUDIO 5 | |
79 | #define M1535_IRQ_COM1 4 | |
80 | #define M1535_IRQ_COM2 4 | |
81 | #define M1535_IRQ_IRDA 3 | |
82 | #define M1535_IRQ_KBD 1 | |
83 | #define M1535_IRQ_TMR 0 | |
84 | ||
85 | /* Rockhopper "slots" assignment; this is hard-coded ... */ | |
86 | #define ROCKHOPPER_M5451_SLOT 1 | |
87 | #define ROCKHOPPER_M1535_SLOT 2 | |
88 | #define ROCKHOPPER_M5229_SLOT 11 | |
89 | #define ROCKHOPPER_M5237_SLOT 15 | |
90 | #define ROCKHOPPER_PMU_SLOT 12 | |
91 | /* ... and hard-wired. */ | |
92 | #define ROCKHOPPER_PCI1_SLOT 3 | |
93 | #define ROCKHOPPER_PCI2_SLOT 4 | |
94 | #define ROCKHOPPER_PCI3_SLOT 5 | |
95 | #define ROCKHOPPER_PCI4_SLOT 6 | |
96 | #define ROCKHOPPER_PCNET_SLOT 1 | |
97 | ||
98 | #define M1535_IRQ_MASK(n) (1 << (n)) | |
99 | ||
100 | #define M1535_IRQ_EDGE (M1535_IRQ_MASK(M1535_IRQ_TMR) | \ | |
101 | M1535_IRQ_MASK(M1535_IRQ_KBD) | \ | |
102 | M1535_IRQ_MASK(M1535_IRQ_COM1) | \ | |
103 | M1535_IRQ_MASK(M1535_IRQ_COM2) | \ | |
104 | M1535_IRQ_MASK(M1535_IRQ_IRDA) | \ | |
105 | M1535_IRQ_MASK(M1535_IRQ_RTC) | \ | |
106 | M1535_IRQ_MASK(M1535_IRQ_FDC) | \ | |
107 | M1535_IRQ_MASK(M1535_IRQ_PS2)) | |
108 | ||
109 | #define M1535_IRQ_LEVEL (M1535_IRQ_MASK(M1535_IRQ_IDE) | \ | |
110 | M1535_IRQ_MASK(M1535_IRQ_USB) | \ | |
111 | M1535_IRQ_MASK(M1535_IRQ_INTA) | \ | |
112 | M1535_IRQ_MASK(M1535_IRQ_INTB) | \ | |
113 | M1535_IRQ_MASK(M1535_IRQ_INTC) | \ | |
114 | M1535_IRQ_MASK(M1535_IRQ_INTD)) | |
115 | ||
116 | struct irq_map_entry { | |
117 | u16 bus; | |
118 | u8 slot; | |
119 | u8 irq; | |
120 | }; | |
121 | static struct irq_map_entry int_map[] = { | |
122 | {1, ROCKHOPPER_M5451_SLOT, M1535_IRQ_AUDIO}, /* Audio controller */ | |
123 | {1, ROCKHOPPER_PCI1_SLOT, M1535_IRQ_INTD}, /* PCI slot #1 */ | |
124 | {1, ROCKHOPPER_PCI2_SLOT, M1535_IRQ_INTC}, /* PCI slot #2 */ | |
125 | {1, ROCKHOPPER_M5237_SLOT, M1535_IRQ_USB}, /* USB host controller */ | |
126 | {1, ROCKHOPPER_M5229_SLOT, IDE_PRIMARY_IRQ}, /* IDE controller */ | |
127 | {2, ROCKHOPPER_PCNET_SLOT, M1535_IRQ_INTD}, /* AMD Am79c973 on-board | |
128 | ethernet */ | |
129 | {2, ROCKHOPPER_PCI3_SLOT, M1535_IRQ_INTB}, /* PCI slot #3 */ | |
130 | {2, ROCKHOPPER_PCI4_SLOT, M1535_IRQ_INTC} /* PCI slot #4 */ | |
131 | }; | |
132 | ||
133 | static int pci_intlines[] = | |
134 | { M1535_IRQ_INTA, M1535_IRQ_INTB, M1535_IRQ_INTC, M1535_IRQ_INTD }; | |
135 | ||
136 | /* Determine the Rockhopper IRQ line number for the PCI device */ | |
137 | int rockhopper_get_irq(struct pci_dev *dev, u8 pin, u8 slot) | |
138 | { | |
139 | struct pci_bus *bus; | |
140 | int i; | |
141 | ||
142 | bus = dev->bus; | |
143 | if (bus == NULL) | |
144 | return -1; | |
145 | ||
146 | for (i = 0; i < sizeof (int_map) / sizeof (int_map[0]); i++) { | |
147 | if (int_map[i].bus == bus->number && int_map[i].slot == slot) { | |
148 | int line; | |
149 | for (line = 0; line < 4; line++) | |
150 | if (pci_intlines[line] == int_map[i].irq) | |
151 | break; | |
152 | if (line < 4) | |
153 | return pci_intlines[(line + (pin - 1)) % 4]; | |
154 | else | |
155 | return int_map[i].irq; | |
156 | } | |
157 | } | |
158 | return -1; | |
159 | } | |
160 | ||
161 | #ifdef CONFIG_ROCKHOPPER | |
162 | void i8259_init(void) | |
163 | { | |
164 | outb(0x11, 0x20); /* Master ICW1 */ | |
165 | outb(I8259_IRQ_BASE, 0x21); /* Master ICW2 */ | |
166 | outb(0x04, 0x21); /* Master ICW3 */ | |
167 | outb(0x01, 0x21); /* Master ICW4 */ | |
168 | outb(0xff, 0x21); /* Master IMW */ | |
169 | ||
170 | outb(0x11, 0xa0); /* Slave ICW1 */ | |
171 | outb(I8259_IRQ_BASE + 8, 0xa1); /* Slave ICW2 */ | |
172 | outb(0x02, 0xa1); /* Slave ICW3 */ | |
173 | outb(0x01, 0xa1); /* Slave ICW4 */ | |
174 | outb(0xff, 0xa1); /* Slave IMW */ | |
175 | ||
176 | outb(0x00, 0x4d0); | |
177 | outb(0x02, 0x4d1); /* USB IRQ9 is level */ | |
178 | } | |
179 | #endif | |
180 | ||
181 | int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
182 | { | |
183 | extern int pci_probe_only; | |
184 | pci_probe_only = 1; | |
185 | ||
186 | #ifdef CONFIG_ROCKHOPPER | |
187 | if( dev->bus->number == 1 && vr4133_rockhopper ) { | |
188 | if(slot == ROCKHOPPER_PCI1_SLOT || slot == ROCKHOPPER_PCI2_SLOT) | |
189 | dev->irq = CMBVR41XX_INTA_IRQ; | |
190 | else | |
191 | dev->irq = rockhopper_get_irq(dev, pin, slot); | |
192 | } else | |
193 | dev->irq = CMBVR41XX_INTA_IRQ; | |
194 | #else | |
195 | dev->irq = CMBVR41XX_INTA_IRQ; | |
196 | #endif | |
197 | ||
198 | return dev->irq; | |
199 | } | |
200 | ||
201 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, ali_m1535plus_init); | |
202 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5229, ali_m5229_init); | |
203 | ||
204 |