2 * Currituck board specific routines
4 * Copyright © 2011 Tony Breeds IBM Corporation
6 * Based on earlier code:
7 * Matt Porter <mporter@kernel.crashing.org>
8 * Copyright 2002-2005 MontaVista Software Inc.
10 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
11 * Copyright (c) 2003-2005 Zultys Technologies
13 * Rewritten and ported to the merged powerpc tree:
14 * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
15 * Copyright © 2011 David Kliekamp IBM Corporation
17 * This program is free software; you can redistribute it and/or modify it
18 * under the terms of the GNU General Public License as published by the
19 * Free Software Foundation; either version 2 of the License, or (at your
20 * option) any later version.
23 #include <linux/init.h>
25 #include <linux/of_platform.h>
26 #include <linux/rtc.h>
28 #include <asm/machdep.h>
33 #include <asm/ppc4xx.h>
37 #include <linux/pci.h>
39 static __initdata struct of_device_id ppc47x_of_bus[] = {
40 { .compatible = "ibm,plb4", },
41 { .compatible = "ibm,plb6", },
42 { .compatible = "ibm,opb", },
43 { .compatible = "ibm,ebc", },
47 /* The EEPROM is missing and the default values are bogus. This forces USB in
49 static void __devinit quirk_ppc_currituck_usb_fixup(struct pci_dev *dev)
51 if (of_machine_is_compatible("ibm,currituck")) {
52 pci_write_config_dword(dev, 0xe0, 0x0114231f);
53 pci_write_config_dword(dev, 0xe4, 0x00006c40);
56 DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup);
58 static int __init ppc47x_device_probe(void)
60 of_platform_bus_probe(NULL, ppc47x_of_bus, NULL);
64 machine_device_initcall(ppc47x, ppc47x_device_probe);
66 /* We can have either UICs or MPICs */
67 static void __init ppc47x_init_irq(void)
69 struct device_node *np;
71 /* Find top level interrupt controller */
72 for_each_node_with_property(np, "interrupt-controller") {
73 if (of_get_property(np, "interrupts", NULL) == NULL)
77 panic("Can't find top level interrupt controller");
79 /* Check type and do appropriate initialization */
80 if (of_device_is_compatible(np, "chrp,open-pic")) {
81 /* The MPIC driver will get everything it needs from the
82 * device-tree, just pass 0 to all arguments
85 mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC ");
88 ppc_md.get_irq = mpic_get_irq;
90 panic("Unrecognized top level interrupt controller");
94 static void __cpuinit smp_ppc47x_setup_cpu(int cpu)
96 mpic_setup_this_cpu();
99 static int __cpuinit smp_ppc47x_kick_cpu(int cpu)
101 struct device_node *cpunode = of_get_cpu_node(cpu, NULL);
102 const u64 *spin_table_addr_prop;
104 extern void start_secondary_47x(void);
106 BUG_ON(cpunode == NULL);
108 /* Assume spin table. We could test for the enable-method in
109 * the device-tree but currently there's little point as it's
110 * our only supported method
112 spin_table_addr_prop =
113 of_get_property(cpunode, "cpu-release-addr", NULL);
115 if (spin_table_addr_prop == NULL) {
116 pr_err("CPU%d: Can't start, missing cpu-release-addr !\n",
121 /* Assume it's mapped as part of the linear mapping. This is a bit
122 * fishy but will work fine for now
124 * XXX: Is there any reason to assume differently?
126 spin_table = (u32 *)__va(*spin_table_addr_prop);
127 pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table);
131 spin_table[1] = __pa(start_secondary_47x);
137 static struct smp_ops_t ppc47x_smp_ops = {
138 .probe = smp_mpic_probe,
139 .message_pass = smp_mpic_message_pass,
140 .setup_cpu = smp_ppc47x_setup_cpu,
141 .kick_cpu = smp_ppc47x_kick_cpu,
142 .give_timebase = smp_generic_give_timebase,
143 .take_timebase = smp_generic_take_timebase,
146 static void __init ppc47x_smp_init(void)
148 if (mmu_has_feature(MMU_FTR_TYPE_47x))
149 smp_ops = &ppc47x_smp_ops;
152 #else /* CONFIG_SMP */
153 static void __init ppc47x_smp_init(void) { }
154 #endif /* CONFIG_SMP */
156 static void __init ppc47x_setup_arch(void)
159 /* No need to check the DMA config as we /know/ our windows are all of
160 * RAM. Lets hope that doesn't change */
167 * Called very early, MMU is off, device-tree isn't unflattened
169 static int __init ppc47x_probe(void)
171 unsigned long root = of_get_flat_dt_root();
173 if (!of_flat_dt_is_compatible(root, "ibm,currituck"))
179 /* Use USB controller should have been hardware swizzled but it wasn't :( */
180 static void ppc47x_pci_irq_fixup(struct pci_dev *dev)
182 if (dev->vendor == 0x1033 && (dev->device == 0x0035 ||
183 dev->device == 0x00e0)) {
184 dev->irq = irq_create_mapping(NULL, 47);
185 pr_info("%s: Mapping irq 47 %d\n", __func__, dev->irq);
189 define_machine(ppc47x) {
190 .name = "PowerPC 47x",
191 .probe = ppc47x_probe,
192 .progress = udbg_progress,
193 .init_IRQ = ppc47x_init_irq,
194 .setup_arch = ppc47x_setup_arch,
195 .pci_irq_fixup = ppc47x_pci_irq_fixup,
196 .restart = ppc4xx_reset_system,
197 .calibrate_decr = generic_calibrate_decr,