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review.evervolv.com / android_kernel_htc_msm8960 / ada70d9425bcc5e376fef8591e4e76e204c0834c / . / arch / arm / mach-ixp2000 / ixdp2400.c
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Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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 *************************************************************************/
48static 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
59static struct sys_timer ixdp2400_timer = {
60 .init = ixdp2400_timer_init,
61 .offset = ixp2000_gettimeoffset,
62};
63
64/*************************************************************************
65 * IXDP2400 PCI
66 *************************************************************************/
67void __init ixdp2400_pci_preinit(void)
68{
69 ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
70 ixp2000_pci_preinit();
71}
72
73int 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
82static 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
131static 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
146static 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
155int __init ixdp2400_pci_init(void)
156{
157 if (machine_is_ixdp2400())
158 pci_common_init(&ixdp2400_pci);
159
160 return 0;
161}
162
163subsys_initcall(ixdp2400_pci_init);
164
165void ixdp2400_init_irq(void)
166{
167 ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
168}
169
170MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
171 MAINTAINER("MontaVista Software, Inc.")
172 BOOT_MEM(0x00000000, IXP2000_UART_PHYS_BASE, IXP2000_UART_VIRT_BASE)
173 BOOT_PARAMS(0x00000100)
174 MAPIO(ixdp2x00_map_io)
175 INITIRQ(ixdp2400_init_irq)
176 .timer = &ixdp2400_timer,
177 INIT_MACHINE(ixdp2x00_init_machine)
178MACHINE_END
179