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1 | /* |
2 | * PIKA Warp(tm) board specific routines | |
3 | * | |
4 | * Copyright (c) 2008 PIKA Technologies | |
5 | * Sean MacLennan <smaclennan@pikatech.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | */ | |
12 | #include <linux/init.h> | |
13 | #include <linux/of_platform.h> | |
14 | #include <linux/kthread.h> | |
15 | ||
16 | #include <asm/machdep.h> | |
17 | #include <asm/prom.h> | |
18 | #include <asm/udbg.h> | |
19 | #include <asm/time.h> | |
20 | #include <asm/uic.h> | |
21 | ||
22 | #include "44x.h" | |
23 | ||
24 | ||
25 | static __initdata struct of_device_id warp_of_bus[] = { | |
26 | { .compatible = "ibm,plb4", }, | |
27 | { .compatible = "ibm,opb", }, | |
28 | { .compatible = "ibm,ebc", }, | |
29 | {}, | |
30 | }; | |
31 | ||
32 | static int __init warp_device_probe(void) | |
33 | { | |
34 | of_platform_bus_probe(NULL, warp_of_bus, NULL); | |
35 | return 0; | |
36 | } | |
37 | machine_device_initcall(warp, warp_device_probe); | |
38 | ||
39 | static int __init warp_probe(void) | |
40 | { | |
41 | unsigned long root = of_get_flat_dt_root(); | |
42 | ||
43 | return of_flat_dt_is_compatible(root, "pika,warp"); | |
44 | } | |
45 | ||
46 | define_machine(warp) { | |
47 | .name = "Warp", | |
48 | .probe = warp_probe, | |
49 | .progress = udbg_progress, | |
50 | .init_IRQ = uic_init_tree, | |
51 | .get_irq = uic_get_irq, | |
52 | .restart = ppc44x_reset_system, | |
53 | .calibrate_decr = generic_calibrate_decr, | |
54 | }; | |
55 | ||
56 | ||
57 | #define LED_GREEN (0x80000000 >> 0) | |
58 | #define LED_RED (0x80000000 >> 1) | |
59 | ||
60 | ||
61 | /* This is for the power LEDs 1 = on, 0 = off, -1 = leave alone */ | |
62 | void warp_set_power_leds(int green, int red) | |
63 | { | |
64 | static void __iomem *gpio_base = NULL; | |
65 | unsigned leds; | |
66 | ||
67 | if (gpio_base == NULL) { | |
68 | struct device_node *np; | |
69 | ||
70 | /* Power LEDS are on the second GPIO controller */ | |
71 | np = of_find_compatible_node(NULL, NULL, "ibm,gpio-440EP"); | |
72 | if (np) | |
73 | np = of_find_compatible_node(np, NULL, "ibm,gpio-440EP"); | |
74 | if (np == NULL) { | |
75 | printk(KERN_ERR __FILE__ ": Unable to find gpio\n"); | |
76 | return; | |
77 | } | |
78 | ||
79 | gpio_base = of_iomap(np, 0); | |
80 | of_node_put(np); | |
81 | if (gpio_base == NULL) { | |
82 | printk(KERN_ERR __FILE__ ": Unable to map gpio"); | |
83 | return; | |
84 | } | |
85 | } | |
86 | ||
87 | leds = in_be32(gpio_base); | |
88 | ||
89 | switch (green) { | |
90 | case 0: leds &= ~LED_GREEN; break; | |
91 | case 1: leds |= LED_GREEN; break; | |
92 | } | |
93 | switch (red) { | |
94 | case 0: leds &= ~LED_RED; break; | |
95 | case 1: leds |= LED_RED; break; | |
96 | } | |
97 | ||
98 | out_be32(gpio_base, leds); | |
99 | } | |
100 | EXPORT_SYMBOL(warp_set_power_leds); | |
101 | ||
102 | ||
103 | #ifdef CONFIG_SENSORS_AD7414 | |
104 | static int pika_dtm_thread(void __iomem *fpga) | |
105 | { | |
106 | extern int ad7414_get_temp(int index); | |
107 | ||
108 | while (!kthread_should_stop()) { | |
109 | int temp = ad7414_get_temp(0); | |
110 | ||
111 | out_be32(fpga, temp); | |
112 | ||
113 | set_current_state(TASK_INTERRUPTIBLE); | |
114 | schedule_timeout(HZ); | |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static int __init pika_dtm_start(void) | |
121 | { | |
122 | struct task_struct *dtm_thread; | |
123 | struct device_node *np; | |
124 | struct resource res; | |
125 | void __iomem *fpga; | |
126 | ||
127 | np = of_find_compatible_node(NULL, NULL, "pika,fpga"); | |
128 | if (np == NULL) | |
129 | return -ENOENT; | |
130 | ||
131 | /* We do not call of_iomap here since it would map in the entire | |
132 | * fpga space, which is over 8k. | |
133 | */ | |
134 | if (of_address_to_resource(np, 0, &res)) { | |
135 | of_node_put(np); | |
136 | return -ENOENT; | |
137 | } | |
138 | of_node_put(np); | |
139 | ||
c41f4af8 | 140 | fpga = ioremap(res.start, 0x24); |
f9bdedb2 SM |
141 | if (fpga == NULL) |
142 | return -ENOENT; | |
143 | ||
144 | dtm_thread = kthread_run(pika_dtm_thread, fpga + 0x20, "pika-dtm"); | |
145 | if (IS_ERR(dtm_thread)) { | |
146 | iounmap(fpga); | |
147 | return PTR_ERR(dtm_thread); | |
148 | } | |
149 | ||
150 | return 0; | |
151 | } | |
152 | device_initcall(pika_dtm_start); | |
153 | #endif |