Merge branches 'release', 'asus', 'sony-laptop' and 'thinkpad' into release
[pandora-kernel.git] / arch / powerpc / platforms / 40x / ep405.c
1 /*
2  * Architecture- / platform-specific boot-time initialization code for
3  * IBM PowerPC 4xx based boards. Adapted from original
4  * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
5  * <dan@net4x.com>.
6  *
7  * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
8  *
9  * Rewritten and ported to the merged powerpc tree:
10  * Copyright 2007 IBM Corporation
11  * Josh Boyer <jwboyer@linux.vnet.ibm.com>
12  *
13  * Adapted to EP405 by Ben. Herrenschmidt <benh@kernel.crashing.org>
14  *
15  * TODO: Wire up the PCI IRQ mux and the southbridge interrupts
16  *
17  * 2002 (c) MontaVista, Software, Inc.  This file is licensed under
18  * the terms of the GNU General Public License version 2.  This program
19  * is licensed "as is" without any warranty of any kind, whether express
20  * or implied.
21  */
22
23 #include <linux/init.h>
24 #include <linux/of_platform.h>
25
26 #include <asm/machdep.h>
27 #include <asm/prom.h>
28 #include <asm/udbg.h>
29 #include <asm/time.h>
30 #include <asm/uic.h>
31 #include <asm/pci-bridge.h>
32
33 static struct device_node *bcsr_node;
34 static void __iomem *bcsr_regs;
35
36 /* BCSR registers  */
37 #define BCSR_ID                 0
38 #define BCSR_PCI_CTRL           1
39 #define BCSR_FLASH_NV_POR_CTRL  2
40 #define BCSR_FENET_UART_CTRL    3
41 #define BCSR_PCI_IRQ            4
42 #define BCSR_XIRQ_SELECT        5
43 #define BCSR_XIRQ_ROUTING       6
44 #define BCSR_XIRQ_STATUS        7
45 #define BCSR_XIRQ_STATUS2       8
46 #define BCSR_SW_STAT_LED_CTRL   9
47 #define BCSR_GPIO_IRQ_PAR_CTRL  10
48 /* there's more, can't be bothered typing them tho */
49
50
51 static __initdata struct of_device_id ep405_of_bus[] = {
52         { .compatible = "ibm,plb3", },
53         { .compatible = "ibm,opb", },
54         { .compatible = "ibm,ebc", },
55         {},
56 };
57
58 static int __init ep405_device_probe(void)
59 {
60         of_platform_bus_probe(NULL, ep405_of_bus, NULL);
61
62         return 0;
63 }
64 machine_device_initcall(ep405, ep405_device_probe);
65
66 static void __init ep405_init_bcsr(void)
67 {
68         const u8 *irq_routing;
69         int i;
70
71         /* Find the bloody thing & map it */
72         bcsr_node = of_find_compatible_node(NULL, NULL, "ep405-bcsr");
73         if (bcsr_node == NULL) {
74                 printk(KERN_ERR "EP405 BCSR not found !\n");
75                 return;
76         }
77         bcsr_regs = of_iomap(bcsr_node, 0);
78         if (bcsr_regs == NULL) {
79                 printk(KERN_ERR "EP405 BCSR failed to map !\n");
80                 return;
81         }
82
83         /* Get the irq-routing property and apply the routing to the CPLD */
84         irq_routing = of_get_property(bcsr_node, "irq-routing", NULL);
85         if (irq_routing == NULL)
86                 return;
87         for (i = 0; i < 16; i++) {
88                 u8 irq = irq_routing[i];
89                 out_8(bcsr_regs + BCSR_XIRQ_SELECT, i);
90                 out_8(bcsr_regs + BCSR_XIRQ_ROUTING, irq);
91         }
92         in_8(bcsr_regs + BCSR_XIRQ_SELECT);
93         mb();
94         out_8(bcsr_regs + BCSR_GPIO_IRQ_PAR_CTRL, 0xfe);
95 }
96
97 static void __init ep405_setup_arch(void)
98 {
99         /* Find & init the BCSR CPLD */
100         ep405_init_bcsr();
101
102         ppc_pci_flags = PPC_PCI_REASSIGN_ALL_RSRC;
103 }
104
105 static int __init ep405_probe(void)
106 {
107         unsigned long root = of_get_flat_dt_root();
108
109         if (!of_flat_dt_is_compatible(root, "ep405"))
110                 return 0;
111
112         return 1;
113 }
114
115 define_machine(ep405) {
116         .name                   = "EP405",
117         .probe                  = ep405_probe,
118         .setup_arch             = ep405_setup_arch,
119         .progress               = udbg_progress,
120         .init_IRQ               = uic_init_tree,
121         .get_irq                = uic_get_irq,
122         .calibrate_decr         = generic_calibrate_decr,
123 };