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beat.c
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1 /*
2  * Simple routines for Celleb/Beat
3  *
4  * (C) Copyright 2006-2007 TOSHIBA CORPORATION
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with this program; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #include <linux/export.h>
22 #include <linux/init.h>
23 #include <linux/err.h>
24 #include <linux/rtc.h>
25 #include <linux/interrupt.h>
26 #include <linux/irqreturn.h>
27 #include <linux/reboot.h>
28 
29 #include <asm/hvconsole.h>
30 #include <asm/time.h>
31 #include <asm/machdep.h>
32 #include <asm/firmware.h>
33 
34 #include "beat_wrapper.h"
35 #include "beat.h"
36 #include "beat_interrupt.h"
37 
38 static int beat_pm_poweroff_flag;
39 
40 void beat_restart(char *cmd)
41 {
42  beat_shutdown_logical_partition(!beat_pm_poweroff_flag);
43 }
44 
45 void beat_power_off(void)
46 {
47  beat_shutdown_logical_partition(0);
48 }
49 
50 u64 beat_halt_code = 0x1000000000000000UL;
52 
53 void beat_halt(void)
54 {
55  beat_shutdown_logical_partition(beat_halt_code);
56 }
57 
59 {
60  u64 tim;
61  tim = mktime(rtc_time->tm_year+1900,
62  rtc_time->tm_mon+1, rtc_time->tm_mday,
63  rtc_time->tm_hour, rtc_time->tm_min, rtc_time->tm_sec);
64  if (beat_rtc_write(tim))
65  return -1;
66  return 0;
67 }
68 
70 {
71  u64 tim;
72 
73  if (beat_rtc_read(&tim))
74  tim = 0;
75  to_tm(tim, rtc_time);
76  rtc_time->tm_year -= 1900;
77  rtc_time->tm_mon -= 1;
78 }
79 
80 #define BEAT_NVRAM_SIZE 4096
81 
82 ssize_t beat_nvram_read(char *buf, size_t count, loff_t *index)
83 {
84  unsigned int i;
85  unsigned long len;
86  char *p = buf;
87 
88  if (*index >= BEAT_NVRAM_SIZE)
89  return -ENODEV;
90  i = *index;
91  if (i + count > BEAT_NVRAM_SIZE)
92  count = BEAT_NVRAM_SIZE - i;
93 
94  for (; count != 0; count -= len) {
95  len = count;
96  if (len > BEAT_NVRW_CNT)
97  len = BEAT_NVRW_CNT;
98  if (beat_eeprom_read(i, len, p))
99  return -EIO;
100 
101  p += len;
102  i += len;
103  }
104  *index = i;
105  return p - buf;
106 }
107 
108 ssize_t beat_nvram_write(char *buf, size_t count, loff_t *index)
109 {
110  unsigned int i;
111  unsigned long len;
112  char *p = buf;
113 
114  if (*index >= BEAT_NVRAM_SIZE)
115  return -ENODEV;
116  i = *index;
117  if (i + count > BEAT_NVRAM_SIZE)
118  count = BEAT_NVRAM_SIZE - i;
119 
120  for (; count != 0; count -= len) {
121  len = count;
122  if (len > BEAT_NVRW_CNT)
123  len = BEAT_NVRW_CNT;
124  if (beat_eeprom_write(i, len, p))
125  return -EIO;
126 
127  p += len;
128  i += len;
129  }
130  *index = i;
131  return p - buf;
132 }
133 
135 {
136  return BEAT_NVRAM_SIZE;
137 }
138 
139 int beat_set_xdabr(unsigned long dabr, unsigned long dabrx)
140 {
141  if (beat_set_dabr(dabr, dabrx))
142  return -1;
143  return 0;
144 }
145 
146 int64_t beat_get_term_char(u64 vterm, u64 *len, u64 *t1, u64 *t2)
147 {
148  u64 db[2];
149  s64 ret;
150 
151  ret = beat_get_characters_from_console(vterm, len, (u8 *)db);
152  if (ret == 0) {
153  *t1 = db[0];
154  *t2 = db[1];
155  }
156  return ret;
157 }
159 
160 int64_t beat_put_term_char(u64 vterm, u64 len, u64 t1, u64 t2)
161 {
162  u64 db[2];
163 
164  db[0] = t1;
165  db[1] = t2;
166  return beat_put_characters_to_console(vterm, len, (u8 *)db);
167 }
169 
170 void beat_power_save(void)
171 {
172  beat_pause(0);
173 }
174 
175 #ifdef CONFIG_KEXEC
176 void beat_kexec_cpu_down(int crash, int secondary)
177 {
179 }
180 #endif
181 
182 static irqreturn_t beat_power_event(int virq, void *arg)
183 {
184  printk(KERN_DEBUG "Beat: power button pressed\n");
185  beat_pm_poweroff_flag = 1;
186  ctrl_alt_del();
187  return IRQ_HANDLED;
188 }
189 
190 static irqreturn_t beat_reset_event(int virq, void *arg)
191 {
192  printk(KERN_DEBUG "Beat: reset button pressed\n");
193  beat_pm_poweroff_flag = 0;
194  ctrl_alt_del();
195  return IRQ_HANDLED;
196 }
197 
198 static struct beat_event_list {
199  const char *typecode;
201  unsigned int virq;
202 } beat_event_list[] = {
203  { "power", beat_power_event, 0 },
204  { "reset", beat_reset_event, 0 },
205 };
206 
207 static int __init beat_register_event(void)
208 {
209  u64 path[4], data[2];
210  int rc, i;
211  unsigned int virq;
212 
213  for (i = 0; i < ARRAY_SIZE(beat_event_list); i++) {
214  struct beat_event_list *ev = &beat_event_list[i];
215 
216  if (beat_construct_event_receive_port(data) != 0) {
217  printk(KERN_ERR "Beat: "
218  "cannot construct event receive port for %s\n",
219  ev->typecode);
220  return -EINVAL;
221  }
222 
223  virq = irq_create_mapping(NULL, data[0]);
224  if (virq == NO_IRQ) {
225  printk(KERN_ERR "Beat: failed to get virtual IRQ"
226  " for event receive port for %s\n",
227  ev->typecode);
228  beat_destruct_event_receive_port(data[0]);
229  return -EIO;
230  }
231  ev->virq = virq;
232 
233  rc = request_irq(virq, ev->handler, 0,
234  ev->typecode, NULL);
235  if (rc != 0) {
236  printk(KERN_ERR "Beat: failed to request virtual IRQ"
237  " for event receive port for %s\n",
238  ev->typecode);
239  beat_destruct_event_receive_port(data[0]);
240  return rc;
241  }
242 
243  path[0] = 0x1000000065780000ul; /* 1,ex */
244  path[1] = 0x627574746f6e0000ul; /* button */
245  path[2] = 0;
246  strncpy((char *)&path[2], ev->typecode, 8);
247  path[3] = 0;
248  data[1] = 0;
249 
250  beat_create_repository_node(path, data);
251  }
252  return 0;
253 }
254 
255 static int __init beat_event_init(void)
256 {
257  if (!firmware_has_feature(FW_FEATURE_BEAT))
258  return -EINVAL;
259 
260  beat_pm_poweroff_flag = 0;
261  return beat_register_event();
262 }
263 
264 device_initcall(beat_event_init);