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1da177e4 LT |
1 | /* |
2 | * arch/arm/mach-ixp2000/ixdp2400.c | |
3 | * | |
4 | * IXDP2400 platform support | |
5 | * | |
6 | * Original Author: Naeem Afzal <naeem.m.afzal@intel.com> | |
7 | * Maintainer: Deepak Saxena <dsaxena@plexity.net> | |
8 | * | |
9 | * Copyright (C) 2002 Intel Corp. | |
10 | * Copyright (C) 2003-2004 MontaVista Software, Inc. | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | */ | |
17 | #include <linux/config.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/mm.h> | |
21 | #include <linux/sched.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/device.h> | |
24 | #include <linux/bitops.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/delay.h> | |
29 | ||
30 | #include <asm/io.h> | |
31 | #include <asm/irq.h> | |
32 | #include <asm/pgtable.h> | |
33 | #include <asm/page.h> | |
34 | #include <asm/system.h> | |
35 | #include <asm/hardware.h> | |
36 | #include <asm/mach-types.h> | |
37 | ||
38 | #include <asm/mach/pci.h> | |
39 | #include <asm/mach/map.h> | |
40 | #include <asm/mach/irq.h> | |
41 | #include <asm/mach/time.h> | |
42 | #include <asm/mach/flash.h> | |
43 | #include <asm/mach/arch.h> | |
44 | ||
45 | /************************************************************************* | |
46 | * IXDP2400 timer tick | |
47 | *************************************************************************/ | |
48 | static void __init ixdp2400_timer_init(void) | |
49 | { | |
50 | int numerator, denominator; | |
51 | int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8}; | |
52 | ||
53 | numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2; | |
54 | denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)]; | |
55 | ||
56 | ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2); | |
57 | } | |
58 | ||
59 | static struct sys_timer ixdp2400_timer = { | |
60 | .init = ixdp2400_timer_init, | |
61 | .offset = ixp2000_gettimeoffset, | |
62 | }; | |
63 | ||
64 | /************************************************************************* | |
65 | * IXDP2400 PCI | |
66 | *************************************************************************/ | |
67 | void __init ixdp2400_pci_preinit(void) | |
68 | { | |
69 | ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000); | |
70 | ixp2000_pci_preinit(); | |
71 | } | |
72 | ||
73 | int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys) | |
74 | { | |
75 | sys->mem_offset = 0xe0000000; | |
76 | ||
77 | ixp2000_pci_setup(nr, sys); | |
78 | ||
79 | return 1; | |
80 | } | |
81 | ||
82 | static int __init ixdp2400_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin) | |
83 | { | |
84 | if (ixdp2x00_master_npu()) { | |
85 | ||
86 | /* | |
87 | * Root bus devices. Slave NPU is only one with interrupt. | |
88 | * Everything else, we just return -1 b/c nothing else | |
89 | * on the root bus has interrupts. | |
90 | */ | |
91 | if(!dev->bus->self) { | |
92 | if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN ) | |
93 | return IRQ_IXDP2400_INGRESS_NPU; | |
94 | ||
95 | return -1; | |
96 | } | |
97 | ||
98 | /* | |
99 | * Bridge behind the PMC slot. | |
100 | * NOTE: Only INTA from the PMC slot is routed. VERY BAD. | |
101 | */ | |
102 | if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN && | |
103 | dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN && | |
104 | !dev->bus->parent->self->bus->parent) | |
105 | return IRQ_IXDP2400_PMC; | |
106 | ||
107 | /* | |
108 | * Device behind the first bridge | |
109 | */ | |
110 | if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) { | |
111 | switch(dev->devfn) { | |
112 | case IXDP2400_MASTER_ENET_DEVFN: | |
113 | return IRQ_IXDP2400_ENET; | |
114 | ||
115 | case IXDP2400_MEDIA_DEVFN: | |
116 | return IRQ_IXDP2400_MEDIA_PCI; | |
117 | ||
118 | case IXDP2400_SWITCH_FABRIC_DEVFN: | |
119 | return IRQ_IXDP2400_SF_PCI; | |
120 | ||
121 | case IXDP2X00_PMC_DEVFN: | |
122 | return IRQ_IXDP2400_PMC; | |
123 | } | |
124 | } | |
125 | ||
126 | return -1; | |
127 | } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */ | |
128 | } | |
129 | ||
130 | ||
131 | static void ixdp2400_pci_postinit(void) | |
132 | { | |
133 | struct pci_dev *dev; | |
134 | ||
135 | if (ixdp2x00_master_npu()) { | |
136 | dev = pci_find_slot(1, IXDP2400_SLAVE_ENET_DEVFN); | |
137 | pci_remove_bus_device(dev); | |
138 | } else { | |
139 | dev = pci_find_slot(1, IXDP2400_MASTER_ENET_DEVFN); | |
140 | pci_remove_bus_device(dev); | |
141 | ||
142 | ixdp2x00_slave_pci_postinit(); | |
143 | } | |
144 | } | |
145 | ||
146 | static struct hw_pci ixdp2400_pci __initdata = { | |
147 | .nr_controllers = 1, | |
148 | .setup = ixdp2400_pci_setup, | |
149 | .preinit = ixdp2400_pci_preinit, | |
150 | .postinit = ixdp2400_pci_postinit, | |
151 | .scan = ixp2000_pci_scan_bus, | |
152 | .map_irq = ixdp2400_pci_map_irq, | |
153 | }; | |
154 | ||
155 | int __init ixdp2400_pci_init(void) | |
156 | { | |
157 | if (machine_is_ixdp2400()) | |
158 | pci_common_init(&ixdp2400_pci); | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | subsys_initcall(ixdp2400_pci_init); | |
164 | ||
165 | void ixdp2400_init_irq(void) | |
166 | { | |
167 | ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS); | |
168 | } | |
169 | ||
170 | MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform") | |
e9dea0c6 RK |
171 | /* Maintainer: MontaVista Software, Inc. */ |
172 | .phys_ram = 0x00000000, | |
173 | .phys_io = IXP2000_UART_PHYS_BASE, | |
174 | .io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc, | |
175 | .boot_params = 0x00000100, | |
176 | .map_io = ixdp2x00_map_io, | |
177 | .init_irq = ixdp2400_init_irq, | |
1da177e4 | 178 | .timer = &ixdp2400_timer, |
e9dea0c6 | 179 | .init_machine = ixdp2x00_init_machine, |
1da177e4 LT |
180 | MACHINE_END |
181 |