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authorIngo Molnar <mingo@elte.hu>2008-07-18 16:00:54 -0400
committerIngo Molnar <mingo@elte.hu>2008-07-18 16:00:54 -0400
commitbb2c018b09b681d43f5e08124b83e362647ea82b (patch)
treed794902c78f9fdd04ed88a4b8d451ed6f9292ec0 /arch/powerpc/platforms/44x/warp.c
parent82638844d9a8581bbf33201cc209a14876eca167 (diff)
parent5b664cb235e97afbf34db9c4d77f08ebd725335e (diff)
Merge branch 'linus' into cpus4096
Conflicts: drivers/acpi/processor_throttling.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/platforms/44x/warp.c')
-rw-r--r--arch/powerpc/platforms/44x/warp.c293
1 files changed, 243 insertions, 50 deletions
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index 39cf6150a72b..9565995cba7f 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -12,6 +12,9 @@
12#include <linux/init.h> 12#include <linux/init.h>
13#include <linux/of_platform.h> 13#include <linux/of_platform.h>
14#include <linux/kthread.h> 14#include <linux/kthread.h>
15#include <linux/i2c.h>
16#include <linux/interrupt.h>
17#include <linux/delay.h>
15 18
16#include <asm/machdep.h> 19#include <asm/machdep.h>
17#include <asm/prom.h> 20#include <asm/prom.h>
@@ -27,6 +30,18 @@ static __initdata struct of_device_id warp_of_bus[] = {
27 {}, 30 {},
28}; 31};
29 32
33static __initdata struct i2c_board_info warp_i2c_info[] = {
34 { I2C_BOARD_INFO("ad7414", 0x4a) }
35};
36
37static int __init warp_arch_init(void)
38{
39 /* This should go away once support is moved to the dts. */
40 i2c_register_board_info(0, warp_i2c_info, ARRAY_SIZE(warp_i2c_info));
41 return 0;
42}
43machine_arch_initcall(warp, warp_arch_init);
44
30static int __init warp_device_probe(void) 45static int __init warp_device_probe(void)
31{ 46{
32 of_platform_bus_probe(NULL, warp_of_bus, NULL); 47 of_platform_bus_probe(NULL, warp_of_bus, NULL);
@@ -52,61 +67,232 @@ define_machine(warp) {
52}; 67};
53 68
54 69
55#define LED_GREEN (0x80000000 >> 0) 70/* I am not sure this is the best place for this... */
56#define LED_RED (0x80000000 >> 1) 71static int __init warp_post_info(void)
72{
73 struct device_node *np;
74 void __iomem *fpga;
75 u32 post1, post2;
76
77 /* Sighhhh... POST information is in the sd area. */
78 np = of_find_compatible_node(NULL, NULL, "pika,fpga-sd");
79 if (np == NULL)
80 return -ENOENT;
81
82 fpga = of_iomap(np, 0);
83 of_node_put(np);
84 if (fpga == NULL)
85 return -ENOENT;
86
87 post1 = in_be32(fpga + 0x40);
88 post2 = in_be32(fpga + 0x44);
89
90 iounmap(fpga);
91
92 if (post1 || post2)
93 printk(KERN_INFO "Warp POST %08x %08x\n", post1, post2);
94 else
95 printk(KERN_INFO "Warp POST OK\n");
96
97 return 0;
98}
99machine_late_initcall(warp, warp_post_info);
100
101
102#ifdef CONFIG_SENSORS_AD7414
103
104static LIST_HEAD(dtm_shutdown_list);
105static void __iomem *dtm_fpga;
106static void __iomem *gpio_base;
107
108
109struct dtm_shutdown {
110 struct list_head list;
111 void (*func)(void *arg);
112 void *arg;
113};
57 114
58 115
59/* This is for the power LEDs 1 = on, 0 = off, -1 = leave alone */ 116int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
60void warp_set_power_leds(int green, int red)
61{ 117{
62 static void __iomem *gpio_base = NULL; 118 struct dtm_shutdown *shutdown;
63 unsigned leds; 119
64 120 shutdown = kmalloc(sizeof(struct dtm_shutdown), GFP_KERNEL);
65 if (gpio_base == NULL) { 121 if (shutdown == NULL)
66 struct device_node *np; 122 return -ENOMEM;
67 123
68 /* Power LEDS are on the second GPIO controller */ 124 shutdown->func = func;
69 np = of_find_compatible_node(NULL, NULL, "ibm,gpio-440EP"); 125 shutdown->arg = arg;
70 if (np) 126
71 np = of_find_compatible_node(np, NULL, "ibm,gpio-440EP"); 127 list_add(&shutdown->list, &dtm_shutdown_list);
72 if (np == NULL) { 128
73 printk(KERN_ERR __FILE__ ": Unable to find gpio\n"); 129 return 0;
74 return; 130}
131
132int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
133{
134 struct dtm_shutdown *shutdown;
135
136 list_for_each_entry(shutdown, &dtm_shutdown_list, list)
137 if (shutdown->func == func && shutdown->arg == arg) {
138 list_del(&shutdown->list);
139 kfree(shutdown);
140 return 0;
141 }
142
143 return -EINVAL;
144}
145
146static irqreturn_t temp_isr(int irq, void *context)
147{
148 struct dtm_shutdown *shutdown;
149
150 local_irq_disable();
151
152 /* Run through the shutdown list. */
153 list_for_each_entry(shutdown, &dtm_shutdown_list, list)
154 shutdown->func(shutdown->arg);
155
156 printk(KERN_EMERG "\n\nCritical Temperature Shutdown\n");
157
158 while (1) {
159 if (dtm_fpga) {
160 unsigned reset = in_be32(dtm_fpga + 0x14);
161 out_be32(dtm_fpga + 0x14, reset);
75 } 162 }
76 163
77 gpio_base = of_iomap(np, 0); 164 if (gpio_base) {
78 of_node_put(np); 165 unsigned leds = in_be32(gpio_base);
79 if (gpio_base == NULL) { 166
80 printk(KERN_ERR __FILE__ ": Unable to map gpio"); 167 /* green off, red toggle */
81 return; 168 leds &= ~0x80000000;
169 leds ^= 0x40000000;
170
171 out_be32(gpio_base, leds);
82 } 172 }
173
174 mdelay(500);
175 }
176}
177
178static int pika_setup_leds(void)
179{
180 struct device_node *np;
181 const u32 *gpios;
182 int len;
183
184 np = of_find_compatible_node(NULL, NULL, "linux,gpio-led");
185 if (!np) {
186 printk(KERN_ERR __FILE__ ": Unable to find gpio-led\n");
187 return -ENOENT;
83 } 188 }
84 189
85 leds = in_be32(gpio_base); 190 gpios = of_get_property(np, "gpios", &len);
191 of_node_put(np);
192 if (!gpios || len < 4) {
193 printk(KERN_ERR __FILE__
194 ": Unable to get gpios property (%d)\n", len);
195 return -ENOENT;
196 }
86 197
87 switch (green) { 198 np = of_find_node_by_phandle(gpios[0]);
88 case 0: leds &= ~LED_GREEN; break; 199 if (!np) {
89 case 1: leds |= LED_GREEN; break; 200 printk(KERN_ERR __FILE__ ": Unable to find gpio\n");
201 return -ENOENT;
90 } 202 }
91 switch (red) { 203
92 case 0: leds &= ~LED_RED; break; 204 gpio_base = of_iomap(np, 0);
93 case 1: leds |= LED_RED; break; 205 of_node_put(np);
206 if (!gpio_base) {
207 printk(KERN_ERR __FILE__ ": Unable to map gpio");
208 return -ENOMEM;
94 } 209 }
95 210
96 out_be32(gpio_base, leds); 211 return 0;
97} 212}
98EXPORT_SYMBOL(warp_set_power_leds);
99 213
214static void pika_setup_critical_temp(struct i2c_client *client)
215{
216 struct device_node *np;
217 int irq, rc;
218
219 /* Do this before enabling critical temp interrupt since we
220 * may immediately interrupt.
221 */
222 pika_setup_leds();
223
224 /* These registers are in 1 degree increments. */
225 i2c_smbus_write_byte_data(client, 2, 65); /* Thigh */
226 i2c_smbus_write_byte_data(client, 3, 55); /* Tlow */
227
228 np = of_find_compatible_node(NULL, NULL, "adi,ad7414");
229 if (np == NULL) {
230 printk(KERN_ERR __FILE__ ": Unable to find ad7414\n");
231 return;
232 }
233
234 irq = irq_of_parse_and_map(np, 0);
235 of_node_put(np);
236 if (irq == NO_IRQ) {
237 printk(KERN_ERR __FILE__ ": Unable to get ad7414 irq\n");
238 return;
239 }
240
241 rc = request_irq(irq, temp_isr, 0, "ad7414", NULL);
242 if (rc) {
243 printk(KERN_ERR __FILE__
244 ": Unable to request ad7414 irq %d = %d\n", irq, rc);
245 return;
246 }
247}
248
249static inline void pika_dtm_check_fan(void __iomem *fpga)
250{
251 static int fan_state;
252 u32 fan = in_be32(fpga + 0x34) & (1 << 14);
253
254 if (fan_state != fan) {
255 fan_state = fan;
256 if (fan)
257 printk(KERN_WARNING "Fan rotation error detected."
258 " Please check hardware.\n");
259 }
260}
100 261
101#ifdef CONFIG_SENSORS_AD7414
102static int pika_dtm_thread(void __iomem *fpga) 262static int pika_dtm_thread(void __iomem *fpga)
103{ 263{
104 extern int ad7414_get_temp(int index); 264 struct i2c_adapter *adap;
265 struct i2c_client *client;
266
267 /* We loop in case either driver was compiled as a module and
268 * has not been insmoded yet.
269 */
270 while (!(adap = i2c_get_adapter(0))) {
271 set_current_state(TASK_INTERRUPTIBLE);
272 schedule_timeout(HZ);
273 }
274
275 while (1) {
276 list_for_each_entry(client, &adap->clients, list)
277 if (client->addr == 0x4a)
278 goto found_it;
279
280 set_current_state(TASK_INTERRUPTIBLE);
281 schedule_timeout(HZ);
282 }
283
284found_it:
285 i2c_put_adapter(adap);
286
287 pika_setup_critical_temp(client);
288
289 printk(KERN_INFO "PIKA DTM thread running.\n");
105 290
106 while (!kthread_should_stop()) { 291 while (!kthread_should_stop()) {
107 int temp = ad7414_get_temp(0); 292 u16 temp = swab16(i2c_smbus_read_word_data(client, 0));
293 out_be32(fpga + 0x20, temp);
108 294
109 out_be32(fpga, temp); 295 pika_dtm_check_fan(fpga);
110 296
111 set_current_state(TASK_INTERRUPTIBLE); 297 set_current_state(TASK_INTERRUPTIBLE);
112 schedule_timeout(HZ); 298 schedule_timeout(HZ);
@@ -115,37 +301,44 @@ static int pika_dtm_thread(void __iomem *fpga)
115 return 0; 301 return 0;
116} 302}
117 303
304
118static int __init pika_dtm_start(void) 305static int __init pika_dtm_start(void)
119{ 306{
120 struct task_struct *dtm_thread; 307 struct task_struct *dtm_thread;
121 struct device_node *np; 308 struct device_node *np;
122 struct resource res;
123 void __iomem *fpga;
124 309
125 np = of_find_compatible_node(NULL, NULL, "pika,fpga"); 310 np = of_find_compatible_node(NULL, NULL, "pika,fpga");
126 if (np == NULL) 311 if (np == NULL)
127 return -ENOENT; 312 return -ENOENT;
128 313
129 /* We do not call of_iomap here since it would map in the entire 314 dtm_fpga = of_iomap(np, 0);
130 * fpga space, which is over 8k.
131 */
132 if (of_address_to_resource(np, 0, &res)) {
133 of_node_put(np);
134 return -ENOENT;
135 }
136 of_node_put(np); 315 of_node_put(np);
137 316 if (dtm_fpga == NULL)
138 fpga = ioremap(res.start, 0x24);
139 if (fpga == NULL)
140 return -ENOENT; 317 return -ENOENT;
141 318
142 dtm_thread = kthread_run(pika_dtm_thread, fpga + 0x20, "pika-dtm"); 319 dtm_thread = kthread_run(pika_dtm_thread, dtm_fpga, "pika-dtm");
143 if (IS_ERR(dtm_thread)) { 320 if (IS_ERR(dtm_thread)) {
144 iounmap(fpga); 321 iounmap(dtm_fpga);
145 return PTR_ERR(dtm_thread); 322 return PTR_ERR(dtm_thread);
146 } 323 }
147 324
148 return 0; 325 return 0;
149} 326}
150device_initcall(pika_dtm_start); 327machine_late_initcall(warp, pika_dtm_start);
328
329#else /* !CONFIG_SENSORS_AD7414 */
330
331int pika_dtm_register_shutdown(void (*func)(void *arg), void *arg)
332{
333 return 0;
334}
335
336int pika_dtm_unregister_shutdown(void (*func)(void *arg), void *arg)
337{
338 return 0;
339}
340
151#endif 341#endif
342
343EXPORT_SYMBOL(pika_dtm_register_shutdown);
344EXPORT_SYMBOL(pika_dtm_unregister_shutdown);