Merge git://git.infradead.org/mtd-2.6
[linux-2.6.git] / arch / arm / mach-ixp23xx / roadrunner.c
1 /*
2  * arch/arm/mach-ixp23xx/roadrunner.c
3  *
4  * RoadRunner board-specific routines
5  *
6  * Author: Deepak Saxena <dsaxena@plexity.net>
7  *
8  * Copyright 2005 (c) MontaVista Software, Inc.
9  *
10  * Based on 2.4 code Copyright 2005 (c) ADI Engineering Corporation
11  *
12  * This file is licensed under the terms of the GNU General Public
13  * License version 2. This program is licensed "as is" without any
14  * warranty of any kind, whether express or implied.
15  */
16
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/spinlock.h>
20 #include <linux/sched.h>
21 #include <linux/interrupt.h>
22 #include <linux/serial.h>
23 #include <linux/tty.h>
24 #include <linux/bitops.h>
25 #include <linux/ioport.h>
26 #include <linux/serial_8250.h>
27 #include <linux/serial_core.h>
28 #include <linux/device.h>
29 #include <linux/mm.h>
30 #include <linux/pci.h>
31 #include <linux/mtd/physmap.h>
32
33 #include <asm/types.h>
34 #include <asm/setup.h>
35 #include <asm/memory.h>
36 #include <mach/hardware.h>
37 #include <asm/mach-types.h>
38 #include <asm/irq.h>
39 #include <asm/system.h>
40 #include <asm/tlbflush.h>
41 #include <asm/pgtable.h>
42
43 #include <asm/mach/map.h>
44 #include <asm/mach/irq.h>
45 #include <asm/mach/arch.h>
46 #include <asm/mach/pci.h>
47
48 /*
49  * Interrupt mapping
50  */
51 #define INTA            IRQ_ROADRUNNER_PCI_INTA
52 #define INTB            IRQ_ROADRUNNER_PCI_INTB
53 #define INTC            IRQ_ROADRUNNER_PCI_INTC
54 #define INTD            IRQ_ROADRUNNER_PCI_INTD
55
56 #define INTC_PIN        IXP23XX_GPIO_PIN_11
57 #define INTD_PIN        IXP23XX_GPIO_PIN_12
58
59 static int __init roadrunner_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
60 {
61         static int pci_card_slot_irq[] = {INTB, INTC, INTD, INTA};
62         static int pmc_card_slot_irq[] = {INTA, INTB, INTC, INTD};
63         static int usb_irq[] = {INTB, INTC, INTD, -1};
64         static int mini_pci_1_irq[] = {INTB, INTC, -1, -1};
65         static int mini_pci_2_irq[] = {INTC, INTD, -1, -1};
66
67         switch(dev->bus->number) {
68                 case 0:
69                         switch(dev->devfn) {
70                         case 0x0: // PCI-PCI bridge
71                                 break;
72                         case 0x8: // PCI Card Slot
73                                 return pci_card_slot_irq[pin - 1];
74                         case 0x10: // PMC Slot
75                                 return pmc_card_slot_irq[pin - 1];
76                         case 0x18: // PMC Slot Secondary Agent
77                                 break;
78                         case 0x20: // IXP Processor
79                                 break;
80                         default:
81                                 return NO_IRQ;
82                         }
83                         break;
84
85                 case 1:
86                         switch(dev->devfn) {
87                         case 0x0: // IDE Controller
88                                 return (pin == 1) ? INTC : -1;
89                         case 0x8: // USB fun 0
90                         case 0x9: // USB fun 1
91                         case 0xa: // USB fun 2
92                                 return usb_irq[pin - 1];
93                         case 0x10: // Mini PCI 1
94                                 return mini_pci_1_irq[pin-1];
95                         case 0x18: // Mini PCI 2
96                                 return mini_pci_2_irq[pin-1];
97                         case 0x20: // MEM slot
98                                 return (pin == 1) ? INTA : -1;
99                         default:
100                                 return NO_IRQ;
101                         }
102                         break;
103
104                 default:
105                         return NO_IRQ;
106         }
107
108         return NO_IRQ;
109 }
110
111 static void __init roadrunner_pci_preinit(void)
112 {
113         set_irq_type(IRQ_ROADRUNNER_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
114         set_irq_type(IRQ_ROADRUNNER_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
115
116         ixp23xx_pci_preinit();
117 }
118
119 static struct hw_pci roadrunner_pci __initdata = {
120         .nr_controllers = 1,
121         .preinit        = roadrunner_pci_preinit,
122         .setup          = ixp23xx_pci_setup,
123         .scan           = ixp23xx_pci_scan_bus,
124         .map_irq        = roadrunner_map_irq,
125 };
126
127 static int __init roadrunner_pci_init(void)
128 {
129         if (machine_is_roadrunner())
130                 pci_common_init(&roadrunner_pci);
131
132         return 0;
133 };
134
135 subsys_initcall(roadrunner_pci_init);
136
137 static struct physmap_flash_data roadrunner_flash_data = {
138         .width          = 2,
139 };
140
141 static struct resource roadrunner_flash_resource = {
142         .start          = 0x90000000,
143         .end            = 0x93ffffff,
144         .flags          = IORESOURCE_MEM,
145 };
146
147 static struct platform_device roadrunner_flash = {
148         .name           = "physmap-flash",
149         .id             = 0,
150         .dev            = {
151                 .platform_data  = &roadrunner_flash_data,
152         },
153         .num_resources  = 1,
154         .resource       = &roadrunner_flash_resource,
155 };
156
157 static void __init roadrunner_init(void)
158 {
159         platform_device_register(&roadrunner_flash);
160
161         /*
162          * Mark flash as writeable
163          */
164         IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
165         IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
166         IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
167         IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
168
169         ixp23xx_sys_init();
170 }
171
172 MACHINE_START(ROADRUNNER, "ADI Engineering RoadRunner Development Platform")
173         /* Maintainer: Deepak Saxena */
174         .phys_io        = IXP23XX_PERIPHERAL_PHYS,
175         .io_pg_offst    = ((IXP23XX_PERIPHERAL_VIRT >> 18)) & 0xfffc,
176         .map_io         = ixp23xx_map_io,
177         .init_irq       = ixp23xx_init_irq,
178         .timer          = &ixp23xx_timer,
179         .boot_params    = 0x00000100,
180         .init_machine   = roadrunner_init,
181 MACHINE_END