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228d5505 TB |
1 | /* |
2 | * Currituck board specific routines | |
3 | * | |
4 | * Copyright © 2011 Tony Breeds IBM Corporation | |
5 | * | |
6 | * Based on earlier code: | |
7 | * Matt Porter <mporter@kernel.crashing.org> | |
8 | * Copyright 2002-2005 MontaVista Software Inc. | |
9 | * | |
10 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> | |
11 | * Copyright (c) 2003-2005 Zultys Technologies | |
12 | * | |
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 | |
16 | * | |
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. | |
21 | */ | |
22 | ||
23 | #include <linux/init.h> | |
228d5505 TB |
24 | #include <linux/of.h> |
25 | #include <linux/of_platform.h> | |
26 | #include <linux/rtc.h> | |
27 | ||
28 | #include <asm/machdep.h> | |
29 | #include <asm/prom.h> | |
30 | #include <asm/udbg.h> | |
31 | #include <asm/time.h> | |
32 | #include <asm/uic.h> | |
33 | #include <asm/ppc4xx.h> | |
34 | #include <asm/mpic.h> | |
35 | #include <asm/mmu.h> | |
36 | ||
37 | #include <linux/pci.h> | |
38 | ||
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", }, | |
44 | {}, | |
45 | }; | |
46 | ||
47 | /* The EEPROM is missing and the default values are bogus. This forces USB in | |
48 | * to EHCI mode */ | |
cad5cef6 | 49 | static void quirk_ppc_currituck_usb_fixup(struct pci_dev *dev) |
228d5505 TB |
50 | { |
51 | if (of_machine_is_compatible("ibm,currituck")) { | |
52 | pci_write_config_dword(dev, 0xe0, 0x0114231f); | |
53 | pci_write_config_dword(dev, 0xe4, 0x00006c40); | |
54 | } | |
55 | } | |
56 | DECLARE_PCI_FIXUP_HEADER(0x1033, 0x0035, quirk_ppc_currituck_usb_fixup); | |
57 | ||
58 | static int __init ppc47x_device_probe(void) | |
59 | { | |
60 | of_platform_bus_probe(NULL, ppc47x_of_bus, NULL); | |
61 | ||
62 | return 0; | |
63 | } | |
64 | machine_device_initcall(ppc47x, ppc47x_device_probe); | |
65 | ||
66 | /* We can have either UICs or MPICs */ | |
67 | static void __init ppc47x_init_irq(void) | |
68 | { | |
69 | struct device_node *np; | |
70 | ||
71 | /* Find top level interrupt controller */ | |
72 | for_each_node_with_property(np, "interrupt-controller") { | |
73 | if (of_get_property(np, "interrupts", NULL) == NULL) | |
74 | break; | |
75 | } | |
76 | if (np == NULL) | |
77 | panic("Can't find top level interrupt controller"); | |
78 | ||
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 | |
83 | */ | |
84 | struct mpic *mpic = | |
e55d7f73 | 85 | mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC "); |
228d5505 TB |
86 | BUG_ON(mpic == NULL); |
87 | mpic_init(mpic); | |
88 | ppc_md.get_irq = mpic_get_irq; | |
89 | } else | |
90 | panic("Unrecognized top level interrupt controller"); | |
91 | } | |
92 | ||
93 | #ifdef CONFIG_SMP | |
94 | static void __cpuinit smp_ppc47x_setup_cpu(int cpu) | |
95 | { | |
96 | mpic_setup_this_cpu(); | |
97 | } | |
98 | ||
99 | static int __cpuinit smp_ppc47x_kick_cpu(int cpu) | |
100 | { | |
101 | struct device_node *cpunode = of_get_cpu_node(cpu, NULL); | |
102 | const u64 *spin_table_addr_prop; | |
103 | u32 *spin_table; | |
104 | extern void start_secondary_47x(void); | |
105 | ||
106 | BUG_ON(cpunode == NULL); | |
107 | ||
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 | |
111 | */ | |
112 | spin_table_addr_prop = | |
113 | of_get_property(cpunode, "cpu-release-addr", NULL); | |
114 | ||
115 | if (spin_table_addr_prop == NULL) { | |
116 | pr_err("CPU%d: Can't start, missing cpu-release-addr !\n", | |
117 | cpu); | |
118 | return 1; | |
119 | } | |
120 | ||
121 | /* Assume it's mapped as part of the linear mapping. This is a bit | |
122 | * fishy but will work fine for now | |
123 | * | |
124 | * XXX: Is there any reason to assume differently? | |
125 | */ | |
126 | spin_table = (u32 *)__va(*spin_table_addr_prop); | |
127 | pr_debug("CPU%d: Spin table mapped at %p\n", cpu, spin_table); | |
128 | ||
129 | spin_table[3] = cpu; | |
130 | smp_wmb(); | |
131 | spin_table[1] = __pa(start_secondary_47x); | |
132 | mb(); | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
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, | |
144 | }; | |
145 | ||
146 | static void __init ppc47x_smp_init(void) | |
147 | { | |
148 | if (mmu_has_feature(MMU_FTR_TYPE_47x)) | |
149 | smp_ops = &ppc47x_smp_ops; | |
150 | } | |
151 | ||
152 | #else /* CONFIG_SMP */ | |
153 | static void __init ppc47x_smp_init(void) { } | |
154 | #endif /* CONFIG_SMP */ | |
155 | ||
156 | static void __init ppc47x_setup_arch(void) | |
157 | { | |
158 | ||
159 | /* No need to check the DMA config as we /know/ our windows are all of | |
160 | * RAM. Lets hope that doesn't change */ | |
688ba1db JH |
161 | swiotlb_detect_4g(); |
162 | ||
228d5505 TB |
163 | ppc47x_smp_init(); |
164 | } | |
165 | ||
166 | /* | |
167 | * Called very early, MMU is off, device-tree isn't unflattened | |
168 | */ | |
169 | static int __init ppc47x_probe(void) | |
170 | { | |
171 | unsigned long root = of_get_flat_dt_root(); | |
172 | ||
173 | if (!of_flat_dt_is_compatible(root, "ibm,currituck")) | |
174 | return 0; | |
175 | ||
176 | return 1; | |
177 | } | |
178 | ||
179 | /* Use USB controller should have been hardware swizzled but it wasn't :( */ | |
180 | static void ppc47x_pci_irq_fixup(struct pci_dev *dev) | |
181 | { | |
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); | |
186 | } | |
187 | } | |
188 | ||
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, | |
198 | }; |