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7d13d21a KG |
1 | /* |
2 | * arch/powerpc/platforms/83xx/mpc834x_sys.c | |
3 | * | |
4 | * MPC834x SYS board specific routines | |
5 | * | |
6 | * Maintainer: Kumar Gala <galak@kernel.crashing.org> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | */ | |
13 | ||
7d13d21a KG |
14 | #include <linux/stddef.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/reboot.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/kdev_t.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/console.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/seq_file.h> | |
25 | #include <linux/root_dev.h> | |
7d13d21a KG |
26 | |
27 | #include <asm/system.h> | |
7d13d21a KG |
28 | #include <asm/atomic.h> |
29 | #include <asm/time.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/machdep.h> | |
32 | #include <asm/ipic.h> | |
33 | #include <asm/bootinfo.h> | |
7d13d21a | 34 | #include <asm/irq.h> |
7d13d21a KG |
35 | #include <asm/prom.h> |
36 | #include <asm/udbg.h> | |
37 | #include <sysdev/fsl_soc.h> | |
38 | ||
39 | #include "mpc83xx.h" | |
40 | ||
41 | #ifndef CONFIG_PCI | |
42 | unsigned long isa_io_base = 0; | |
43 | unsigned long isa_mem_base = 0; | |
44 | #endif | |
45 | ||
7d13d21a KG |
46 | /* ************************************************************************ |
47 | * | |
48 | * Setup the architecture | |
49 | * | |
50 | */ | |
e060e084 | 51 | static void __init mpc834x_sys_setup_arch(void) |
7d13d21a KG |
52 | { |
53 | struct device_node *np; | |
54 | ||
55 | if (ppc_md.progress) | |
56 | ppc_md.progress("mpc834x_sys_setup_arch()", 0); | |
57 | ||
58 | np = of_find_node_by_type(NULL, "cpu"); | |
59 | if (np != 0) { | |
8efca493 JK |
60 | const unsigned int *fp = |
61 | get_property(np, "clock-frequency", NULL); | |
7d13d21a KG |
62 | if (fp != 0) |
63 | loops_per_jiffy = *fp / HZ; | |
64 | else | |
65 | loops_per_jiffy = 50000000 / HZ; | |
66 | of_node_put(np); | |
67 | } | |
7d13d21a KG |
68 | #ifdef CONFIG_PCI |
69 | for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) | |
70 | add_bridge(np); | |
71 | ||
7d13d21a KG |
72 | ppc_md.pci_exclude_device = mpc83xx_exclude_device; |
73 | #endif | |
74 | ||
75 | #ifdef CONFIG_ROOT_NFS | |
e060e084 | 76 | ROOT_DEV = Root_NFS; |
7d13d21a | 77 | #else |
e060e084 | 78 | ROOT_DEV = Root_HDA1; |
7d13d21a KG |
79 | #endif |
80 | } | |
81 | ||
e60bd7f1 | 82 | static void __init mpc834x_sys_init_IRQ(void) |
7d13d21a | 83 | { |
f1f17716 KP |
84 | struct device_node *np; |
85 | ||
86 | np = of_find_node_by_type(NULL, "ipic"); | |
87 | if (!np) | |
88 | return; | |
7d13d21a | 89 | |
f1f17716 | 90 | ipic_init(np, 0); |
7d13d21a KG |
91 | |
92 | /* Initialize the default interrupt mapping priorities, | |
93 | * in case the boot rom changed something on us. | |
94 | */ | |
95 | ipic_set_default_priority(); | |
96 | } | |
97 | ||
98 | #if defined(CONFIG_I2C_MPC) && defined(CONFIG_SENSORS_DS1374) | |
e060e084 KG |
99 | extern ulong ds1374_get_rtc_time(void); |
100 | extern int ds1374_set_rtc_time(ulong); | |
7d13d21a | 101 | |
e060e084 | 102 | static int __init mpc834x_rtc_hookup(void) |
7d13d21a | 103 | { |
e060e084 | 104 | struct timespec tv; |
7d13d21a KG |
105 | |
106 | ppc_md.get_rtc_time = ds1374_get_rtc_time; | |
107 | ppc_md.set_rtc_time = ds1374_set_rtc_time; | |
108 | ||
109 | tv.tv_nsec = 0; | |
e060e084 | 110 | tv.tv_sec = (ppc_md.get_rtc_time) (); |
7d13d21a KG |
111 | do_settimeofday(&tv); |
112 | ||
113 | return 0; | |
114 | } | |
e060e084 | 115 | |
7d13d21a KG |
116 | late_initcall(mpc834x_rtc_hookup); |
117 | #endif | |
118 | ||
72d2c3e0 KG |
119 | /* |
120 | * Called very early, MMU is off, device-tree isn't unflattened | |
121 | */ | |
122 | static int __init mpc834x_sys_probe(void) | |
7d13d21a | 123 | { |
72d2c3e0 KG |
124 | /* We always match for now, eventually we should look at the flat |
125 | dev tree to ensure this is the board we are suppose to run on | |
126 | */ | |
127 | return 1; | |
7d13d21a | 128 | } |
72d2c3e0 KG |
129 | |
130 | define_machine(mpc834x_sys) { | |
131 | .name = "MPC834x SYS", | |
132 | .probe = mpc834x_sys_probe, | |
133 | .setup_arch = mpc834x_sys_setup_arch, | |
134 | .init_IRQ = mpc834x_sys_init_IRQ, | |
135 | .get_irq = ipic_get_irq, | |
136 | .restart = mpc83xx_restart, | |
137 | .time_init = mpc83xx_time_init, | |
138 | .calibrate_decr = generic_calibrate_decr, | |
139 | .progress = udbg_progress, | |
140 | }; |