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
7 * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
9 * Rewritten and ported to the merged powerpc tree:
10 * Copyright 2007 IBM Corporation
11 * Josh Boyer <jwboyer@linux.vnet.ibm.com>
13 * Adapted to EP405 by Ben. Herrenschmidt <benh@kernel.crashing.org>
15 * TODO: Wire up the PCI IRQ mux and the southbridge interrupts
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
23 #include <linux/init.h>
24 #include <linux/of_platform.h>
26 #include <asm/machdep.h>
31 #include <asm/pci-bridge.h>
33 static struct device_node *bcsr_node;
34 static void __iomem *bcsr_regs;
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 */
51 static struct of_device_id ep405_of_bus[] = {
52 { .compatible = "ibm,plb3", },
53 { .compatible = "ibm,opb", },
54 { .compatible = "ibm,ebc", },
58 static int __init ep405_device_probe(void)
60 if (!machine_is(ep405))
63 of_platform_bus_probe(NULL, ep405_of_bus, NULL);
67 device_initcall(ep405_device_probe);
69 static void __init ep405_init_bcsr(void)
71 const u8 *irq_routing;
74 /* Find the bloody thing & map it */
75 bcsr_node = of_find_compatible_node(NULL, NULL, "ep405-bcsr");
76 if (bcsr_node == NULL) {
77 printk(KERN_ERR "EP405 BCSR not found !\n");
80 bcsr_regs = of_iomap(bcsr_node, 0);
81 if (bcsr_regs == NULL) {
82 printk(KERN_ERR "EP405 BCSR failed to map !\n");
86 /* Get the irq-routing property and apply the routing to the CPLD */
87 irq_routing = of_get_property(bcsr_node, "irq-routing", NULL);
88 if (irq_routing == NULL)
90 for (i = 0; i < 16; i++) {
91 u8 irq = irq_routing[i];
92 out_8(bcsr_regs + BCSR_XIRQ_SELECT, i);
93 out_8(bcsr_regs + BCSR_XIRQ_ROUTING, irq);
95 in_8(bcsr_regs + BCSR_XIRQ_SELECT);
97 out_8(bcsr_regs + BCSR_GPIO_IRQ_PAR_CTRL, 0xfe);
100 static void __init ep405_setup_arch(void)
102 /* Find & init the BCSR CPLD */
106 static int __init ep405_probe(void)
108 unsigned long root = of_get_flat_dt_root();
110 if (!of_flat_dt_is_compatible(root, "ep405"))
116 define_machine(ep405) {
118 .probe = ep405_probe,
119 .setup_arch = ep405_setup_arch,
120 .progress = udbg_progress,
121 .init_IRQ = uic_init_tree,
122 .get_irq = uic_get_irq,
123 .calibrate_decr = generic_calibrate_decr,