Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm...
[linux-2.6.git] / arch / arm / mach-ixp2000 / ixdp2400.c
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 <mach/hardware.h>
33 #include <asm/mach-types.h>
34
35 #include <asm/mach/pci.h>
36 #include <asm/mach/map.h>
37 #include <asm/mach/irq.h>
38 #include <asm/mach/time.h>
39 #include <asm/mach/flash.h>
40 #include <asm/mach/arch.h>
41
42 /*************************************************************************
43  * IXDP2400 timer tick
44  *************************************************************************/
45 static void __init ixdp2400_timer_init(void)
46 {
47         int numerator, denominator;
48         int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};
49
50         numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2;
51         denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];
52
53         ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
54 }
55
56 static struct sys_timer ixdp2400_timer = {
57         .init           = ixdp2400_timer_init,
58         .offset         = ixp2000_gettimeoffset,
59 };
60
61 /*************************************************************************
62  * IXDP2400 PCI
63  *************************************************************************/
64 void __init ixdp2400_pci_preinit(void)
65 {
66         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
67         ixp2000_pci_preinit();
68         pcibios_setup("firmware");
69 }
70
71 int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys)
72 {
73         sys->mem_offset = 0xe0000000;
74
75         ixp2000_pci_setup(nr, sys);
76
77         return 1;
78 }
79
80 static int __init ixdp2400_pci_map_irq(const struct pci_dev *dev, u8 slot,
81         u8 pin)
82 {
83         if (ixdp2x00_master_npu()) {
84
85                 /*
86                  * Root bus devices.  Slave NPU is only one with interrupt.
87                  * Everything else, we just return -1 b/c nothing else
88                  * on the root bus has interrupts.
89                  */
90                 if(!dev->bus->self) {
91                         if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
92                                 return IRQ_IXDP2400_INGRESS_NPU;
93
94                         return -1;
95                 }
96
97                 /*
98                  * Bridge behind the PMC slot.
99                  * NOTE: Only INTA from the PMC slot is routed. VERY BAD.
100                  */
101                 if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
102                         dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
103                         !dev->bus->parent->self->bus->parent)
104                                   return IRQ_IXDP2400_PMC;
105
106                 /*
107                  * Device behind the first bridge
108                  */
109                 if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
110                         switch(dev->devfn) {
111                                 case IXDP2400_MASTER_ENET_DEVFN:        
112                                         return IRQ_IXDP2400_ENET;       
113                         
114                                 case IXDP2400_MEDIA_DEVFN:
115                                         return IRQ_IXDP2400_MEDIA_PCI;
116
117                                 case IXDP2400_SWITCH_FABRIC_DEVFN:
118                                         return IRQ_IXDP2400_SF_PCI;
119
120                                 case IXDP2X00_PMC_DEVFN:
121                                         return IRQ_IXDP2400_PMC;
122                         }
123                 }
124
125                 return -1;
126         } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
127 }
128
129
130 static void ixdp2400_pci_postinit(void)
131 {
132         struct pci_dev *dev;
133
134         if (ixdp2x00_master_npu()) {
135                 dev = pci_get_bus_and_slot(1, IXDP2400_SLAVE_ENET_DEVFN);
136                 pci_stop_and_remove_bus_device(dev);
137                 pci_dev_put(dev);
138         } else {
139                 dev = pci_get_bus_and_slot(1, IXDP2400_MASTER_ENET_DEVFN);
140                 pci_stop_and_remove_bus_device(dev);
141                 pci_dev_put(dev);
142
143                 ixdp2x00_slave_pci_postinit();
144         }
145 }
146
147 static struct hw_pci ixdp2400_pci __initdata = {
148         .nr_controllers = 1,
149         .setup          = ixdp2400_pci_setup,
150         .preinit        = ixdp2400_pci_preinit,
151         .postinit       = ixdp2400_pci_postinit,
152         .scan           = ixp2000_pci_scan_bus,
153         .map_irq        = ixdp2400_pci_map_irq,
154 };
155
156 int __init ixdp2400_pci_init(void)
157 {
158         if (machine_is_ixdp2400())
159                 pci_common_init(&ixdp2400_pci);
160
161         return 0;
162 }
163
164 subsys_initcall(ixdp2400_pci_init);
165
166 void __init ixdp2400_init_irq(void)
167 {
168         ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
169 }
170
171 MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
172         /* Maintainer: MontaVista Software, Inc. */
173         .atag_offset    = 0x100,
174         .map_io         = ixdp2x00_map_io,
175         .init_irq       = ixdp2400_init_irq,
176         .timer          = &ixdp2400_timer,
177         .init_machine   = ixdp2x00_init_machine,
178         .restart        = ixp2000_restart,
179 MACHINE_END
180