Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[linux-2.6] / 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/slab.h>
27 #include <linux/delay.h>
28 #include <linux/io.h>
29
30 #include <asm/irq.h>
31 #include <asm/pgtable.h>
32 #include <asm/page.h>
33 #include <asm/system.h>
34 #include <mach/hardware.h>
35 #include <asm/mach-types.h>
36
37 #include <asm/mach/pci.h>
38 #include <asm/mach/map.h>
39 #include <asm/mach/irq.h>
40 #include <asm/mach/time.h>
41 #include <asm/mach/flash.h>
42 #include <asm/mach/arch.h>
43
44 /*************************************************************************
45  * IXDP2400 timer tick
46  *************************************************************************/
47 static void __init ixdp2400_timer_init(void)
48 {
49         int numerator, denominator;
50         int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};
51
52         numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2;
53         denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];
54
55         ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
56 }
57
58 static struct sys_timer ixdp2400_timer = {
59         .init           = ixdp2400_timer_init,
60         .offset         = ixp2000_gettimeoffset,
61 };
62
63 /*************************************************************************
64  * IXDP2400 PCI
65  *************************************************************************/
66 void __init ixdp2400_pci_preinit(void)
67 {
68         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
69         ixp2000_pci_preinit();
70         pcibios_setup("firmware");
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_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
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
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         .phys_io        = IXP2000_UART_PHYS_BASE,
175         .io_pg_offst    = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
176         .boot_params    = 0x00000100,
177         .map_io         = ixdp2x00_map_io,
178         .init_irq       = ixdp2400_init_irq,
179         .timer          = &ixdp2400_timer,
180         .init_machine   = ixdp2x00_init_machine,
181 MACHINE_END
182