powerpc: Fix personality handling in ppc64_personality()
[linux/fpc-iii.git] / arch / powerpc / platforms / 44x / warp.c
blob4cfa49901c023f069828c5b8f50a1b5028cf69bf
1 /*
2 * PIKA Warp(tm) board specific routines
4 * Copyright (c) 2008-2009 PIKA Technologies
5 * Sean MacLennan <smaclennan@pikatech.com>
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.
12 #include <linux/init.h>
13 #include <linux/of_platform.h>
14 #include <linux/kthread.h>
15 #include <linux/i2c.h>
16 #include <linux/interrupt.h>
17 #include <linux/delay.h>
18 #include <linux/of_gpio.h>
19 #include <linux/of_i2c.h>
20 #include <linux/slab.h>
21 #include <linux/export.h>
23 #include <asm/machdep.h>
24 #include <asm/prom.h>
25 #include <asm/udbg.h>
26 #include <asm/time.h>
27 #include <asm/uic.h>
28 #include <asm/ppc4xx.h>
31 static __initdata struct of_device_id warp_of_bus[] = {
32 { .compatible = "ibm,plb4", },
33 { .compatible = "ibm,opb", },
34 { .compatible = "ibm,ebc", },
35 {},
38 static int __init warp_device_probe(void)
40 of_platform_bus_probe(NULL, warp_of_bus, NULL);
41 return 0;
43 machine_device_initcall(warp, warp_device_probe);
45 static int __init warp_probe(void)
47 unsigned long root = of_get_flat_dt_root();
49 if (!of_flat_dt_is_compatible(root, "pika,warp"))
50 return 0;
52 /* For __dma_alloc_coherent */
53 ISA_DMA_THRESHOLD = ~0L;
55 return 1;
58 define_machine(warp) {
59 .name = "Warp",
60 .probe = warp_probe,
61 .progress = udbg_progress,
62 .init_IRQ = uic_init_tree,
63 .get_irq = uic_get_irq,
64 .restart = ppc4xx_reset_system,
65 .calibrate_decr = generic_calibrate_decr,
69 static int __init warp_post_info(void)
71 struct device_node *np;
72 void __iomem *fpga;
73 u32 post1, post2;
75 /* Sighhhh... POST information is in the sd area. */
76 np = of_find_compatible_node(NULL, NULL, "pika,fpga-sd");
77 if (np == NULL)
78 return -ENOENT;
80 fpga = of_iomap(np, 0);
81 of_node_put(np);
82 if (fpga == NULL)
83 return -ENOENT;
85 post1 = in_be32(fpga + 0x40);
86 post2 = in_be32(fpga + 0x44);
88 iounmap(fpga);
90 if (post1 || post2)
91 printk(KERN_INFO "Warp POST %08x %08x\n", post1, post2);
92 else
93 printk(KERN_INFO "Warp POST OK\n");
95 return 0;
99 #ifdef CONFIG_SENSORS_AD7414
101 static LIST_HEAD(dtm_shutdown_list);
102 static void __iomem *dtm_fpga;
103 static unsigned green_led, red_led;
106 struct dtm_shutdown {
107 struct list_head list;
108 void (*func)(void *arg);
109 void *arg;
113 int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
115 struct dtm_shutdown *shutdown;
117 shutdown = kmalloc(sizeof(struct dtm_shutdown), GFP_KERNEL);
118 if (shutdown == NULL)
119 return -ENOMEM;
121 shutdown->func = func;
122 shutdown->arg = arg;
124 list_add(&shutdown->list, &dtm_shutdown_list);
126 return 0;
129 int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
131 struct dtm_shutdown *shutdown;
133 list_for_each_entry(shutdown, &dtm_shutdown_list, list)
134 if (shutdown->func == func && shutdown->arg == arg) {
135 list_del(&shutdown->list);
136 kfree(shutdown);
137 return 0;
140 return -EINVAL;
143 static irqreturn_t temp_isr(int irq, void *context)
145 struct dtm_shutdown *shutdown;
146 int value = 1;
148 local_irq_disable();
150 gpio_set_value(green_led, 0);
152 /* Run through the shutdown list. */
153 list_for_each_entry(shutdown, &dtm_shutdown_list, list)
154 shutdown->func(shutdown->arg);
156 printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n\n");
158 while (1) {
159 if (dtm_fpga) {
160 unsigned reset = in_be32(dtm_fpga + 0x14);
161 out_be32(dtm_fpga + 0x14, reset);
164 gpio_set_value(red_led, value);
165 value ^= 1;
166 mdelay(500);
169 /* Not reached */
170 return IRQ_HANDLED;
173 static int pika_setup_leds(void)
175 struct device_node *np, *child;
177 np = of_find_compatible_node(NULL, NULL, "gpio-leds");
178 if (!np) {
179 printk(KERN_ERR __FILE__ ": Unable to find leds\n");
180 return -ENOENT;
183 for_each_child_of_node(np, child)
184 if (strcmp(child->name, "green") == 0)
185 green_led = of_get_gpio(child, 0);
186 else if (strcmp(child->name, "red") == 0)
187 red_led = of_get_gpio(child, 0);
189 of_node_put(np);
191 return 0;
194 static void pika_setup_critical_temp(struct device_node *np,
195 struct i2c_client *client)
197 int irq, rc;
199 /* Do this before enabling critical temp interrupt since we
200 * may immediately interrupt.
202 pika_setup_leds();
204 /* These registers are in 1 degree increments. */
205 i2c_smbus_write_byte_data(client, 2, 65); /* Thigh */
206 i2c_smbus_write_byte_data(client, 3, 0); /* Tlow */
208 irq = irq_of_parse_and_map(np, 0);
209 if (irq == NO_IRQ) {
210 printk(KERN_ERR __FILE__ ": Unable to get ad7414 irq\n");
211 return;
214 rc = request_irq(irq, temp_isr, 0, "ad7414", NULL);
215 if (rc) {
216 printk(KERN_ERR __FILE__
217 ": Unable to request ad7414 irq %d = %d\n", irq, rc);
218 return;
222 static inline void pika_dtm_check_fan(void __iomem *fpga)
224 static int fan_state;
225 u32 fan = in_be32(fpga + 0x34) & (1 << 14);
227 if (fan_state != fan) {
228 fan_state = fan;
229 if (fan)
230 printk(KERN_WARNING "Fan rotation error detected."
231 " Please check hardware.\n");
235 static int pika_dtm_thread(void __iomem *fpga)
237 struct device_node *np;
238 struct i2c_client *client;
240 np = of_find_compatible_node(NULL, NULL, "adi,ad7414");
241 if (np == NULL)
242 return -ENOENT;
244 client = of_find_i2c_device_by_node(np);
245 if (client == NULL) {
246 of_node_put(np);
247 return -ENOENT;
250 pika_setup_critical_temp(np, client);
252 of_node_put(np);
254 printk(KERN_INFO "Warp DTM thread running.\n");
256 while (!kthread_should_stop()) {
257 int val;
259 val = i2c_smbus_read_word_data(client, 0);
260 if (val < 0)
261 dev_dbg(&client->dev, "DTM read temp failed.\n");
262 else {
263 s16 temp = swab16(val);
264 out_be32(fpga + 0x20, temp);
267 pika_dtm_check_fan(fpga);
269 set_current_state(TASK_INTERRUPTIBLE);
270 schedule_timeout(HZ);
273 return 0;
276 static int __init pika_dtm_start(void)
278 struct task_struct *dtm_thread;
279 struct device_node *np;
281 np = of_find_compatible_node(NULL, NULL, "pika,fpga");
282 if (np == NULL)
283 return -ENOENT;
285 dtm_fpga = of_iomap(np, 0);
286 of_node_put(np);
287 if (dtm_fpga == NULL)
288 return -ENOENT;
290 /* Must get post info before thread starts. */
291 warp_post_info();
293 dtm_thread = kthread_run(pika_dtm_thread, dtm_fpga, "pika-dtm");
294 if (IS_ERR(dtm_thread)) {
295 iounmap(dtm_fpga);
296 return PTR_ERR(dtm_thread);
299 return 0;
301 machine_late_initcall(warp, pika_dtm_start);
303 #else /* !CONFIG_SENSORS_AD7414 */
305 int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
307 return 0;
310 int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
312 return 0;
315 machine_late_initcall(warp, warp_post_info);
317 #endif
319 EXPORT_SYMBOL(pika_dtm_register_shutdown);
320 EXPORT_SYMBOL(pika_dtm_unregister_shutdown);