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/kernel.h>
18 #include <linux/init.h>
19 #include <linux/mm.h>
20 #include <linux/sched.h>
21 #include <linux/interrupt.h>
22 #include <linux/device.h>
23 #include <linux/bitops.h>
24 #include <linux/pci.h>
25 #include <linux/ioport.h>
26 #include <linux/delay.h>
27 #include <linux/io.h>
28
29 #include <asm/irq.h>
30 #include <asm/pgtable.h>
31 #include <asm/page.h>
32 #include <asm/system.h>
33 #include <mach/hardware.h>
34 #include <asm/mach-types.h>
35
36 #include <asm/mach/pci.h>
37 #include <asm/mach/map.h>
38 #include <asm/mach/irq.h>
39 #include <asm/mach/time.h>
40 #include <asm/mach/flash.h>
41 #include <asm/mach/arch.h>
42
43 /*************************************************************************
44 * IXDP2400 timer tick
45 *************************************************************************/
ixdp2400_timer_init(void)46 static void __init ixdp2400_timer_init(void)
47 {
48 int numerator, denominator;
49 int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};
50
51 numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2;
52 denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];
53
54 ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
55 }
56
57 static struct sys_timer ixdp2400_timer = {
58 .init = ixdp2400_timer_init,
59 .offset = ixp2000_gettimeoffset,
60 };
61
62 /*************************************************************************
63 * IXDP2400 PCI
64 *************************************************************************/
ixdp2400_pci_preinit(void)65 void __init ixdp2400_pci_preinit(void)
66 {
67 ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
68 ixp2000_pci_preinit();
69 pcibios_setup("firmware");
70 }
71
ixdp2400_pci_setup(int nr,struct pci_sys_data * sys)72 int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys)
73 {
74 sys->mem_offset = 0xe0000000;
75
76 ixp2000_pci_setup(nr, sys);
77
78 return 1;
79 }
80
ixdp2400_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)81 static int __init ixdp2400_pci_map_irq(const struct pci_dev *dev, u8 slot,
82 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
ixdp2400_pci_postinit(void)131 static void ixdp2400_pci_postinit(void)
132 {
133 struct pci_dev *dev;
134
135 if (ixdp2x00_master_npu()) {
136 dev = pci_get_bus_and_slot(1, IXDP2400_SLAVE_ENET_DEVFN);
137 pci_remove_bus_device(dev);
138 pci_dev_put(dev);
139 } else {
140 dev = pci_get_bus_and_slot(1, IXDP2400_MASTER_ENET_DEVFN);
141 pci_remove_bus_device(dev);
142 pci_dev_put(dev);
143
144 ixdp2x00_slave_pci_postinit();
145 }
146 }
147
148 static struct hw_pci ixdp2400_pci __initdata = {
149 .nr_controllers = 1,
150 .setup = ixdp2400_pci_setup,
151 .preinit = ixdp2400_pci_preinit,
152 .postinit = ixdp2400_pci_postinit,
153 .scan = ixp2000_pci_scan_bus,
154 .map_irq = ixdp2400_pci_map_irq,
155 };
156
ixdp2400_pci_init(void)157 int __init ixdp2400_pci_init(void)
158 {
159 if (machine_is_ixdp2400())
160 pci_common_init(&ixdp2400_pci);
161
162 return 0;
163 }
164
165 subsys_initcall(ixdp2400_pci_init);
166
ixdp2400_init_irq(void)167 void __init ixdp2400_init_irq(void)
168 {
169 ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
170 }
171
172 MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
173 /* Maintainer: MontaVista Software, Inc. */
174 .atag_offset = 0x100,
175 .map_io = ixdp2x00_map_io,
176 .init_irq = ixdp2400_init_irq,
177 .timer = &ixdp2400_timer,
178 .init_machine = ixdp2x00_init_machine,
179 .restart = ixp2000_restart,
180 MACHINE_END
181
182