arch/powerpc/platforms/celleb/beat.c

   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/module.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 "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;
  51
  52 void beat_halt(void)
  53 {
  54         beat_shutdown_logical_partition(beat_halt_code);
  55 }
  56
  57 int beat_set_rtc_time(struct rtc_time *rtc_time)
  58 {
  59         u64 tim;
  60         tim = mktime(rtc_time->tm_year+1900,
  61                      rtc_time->tm_mon+1, rtc_time->tm_mday,
  62                      rtc_time->tm_hour, rtc_time->tm_min, rtc_time->tm_sec);
  63         if (beat_rtc_write(tim))
  64                 return -1;
  65         return 0;
  66 }
  67
  68 void beat_get_rtc_time(struct rtc_time *rtc_time)
  69 {
  70         u64 tim;
  71
  72         if (beat_rtc_read(&tim))
  73                 tim = 0;
  74         to_tm(tim, rtc_time);
  75         rtc_time->tm_year -= 1900;
  76         rtc_time->tm_mon -= 1;
  77 }
  78
  79 #define BEAT_NVRAM_SIZE 4096
  80
  81 ssize_t beat_nvram_read(char *buf, size_t count, loff_t *index)
  82 {
  83         unsigned int i;
  84         unsigned long len;
  85         char *p = buf;
  86
  87         if (*index >= BEAT_NVRAM_SIZE)
  88                 return -ENODEV;
  89         i = *index;
  90         if (i + count > BEAT_NVRAM_SIZE)
  91                 count = BEAT_NVRAM_SIZE - i;
  92
  93         for (; count != 0; count -= len) {
  94                 len = count;
  95                 if (len > BEAT_NVRW_CNT)
  96                         len = BEAT_NVRW_CNT;
  97                 if (beat_eeprom_read(i, len, p)) {
  98                         return -EIO;
  99                 }
 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
 128                 p += len;
 129                 i += len;
 130         }
 131         *index = i;
 132         return p - buf;
 133 }
 134
 135 ssize_t beat_nvram_get_size(void)
 136 {
 137         return BEAT_NVRAM_SIZE;
 138 }
 139
 140 int beat_set_xdabr(unsigned long dabr)
 141 {
 142         if (beat_set_dabr(dabr, DABRX_KERNEL | DABRX_USER))
 143                 return -1;
 144         return 0;
 145 }
 146
 147 int64_t beat_get_term_char(u64 vterm, u64 *len, u64 *t1, u64 *t2)
 148 {
 149         u64 db[2];
 150         s64 ret;
 151
 152         ret = beat_get_characters_from_console(vterm, len, (u8*)db);
 153         if (ret == 0) {
 154                 *t1 = db[0];
 155                 *t2 = db[1];
 156         }
 157         return ret;
 158 }
 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 }
 168
 169 void beat_power_save(void)
 170 {
 171         beat_pause(0);
 172 }
 173
 174 #ifdef CONFIG_KEXEC
 175 void beat_kexec_cpu_down(int crash, int secondary)
 176 {
 177         beatic_deinit_IRQ();
 178 }
 179 #endif
 180
 181 static irqreturn_t beat_power_event(int virq, void *arg)
 182 {
 183         printk(KERN_DEBUG "Beat: power button pressed\n");
 184         beat_pm_poweroff_flag = 1;
 185         ctrl_alt_del();
 186         return IRQ_HANDLED;
 187 }
 188
 189 static irqreturn_t beat_reset_event(int virq, void *arg)
 190 {
 191         printk(KERN_DEBUG "Beat: reset button pressed\n");
 192         beat_pm_poweroff_flag = 0;
 193         ctrl_alt_del();
 194         return IRQ_HANDLED;
 195 }
 196
 197 static struct beat_event_list {
 198         const char *typecode;
 199         irq_handler_t handler;
 200         unsigned int virq;
 201 } beat_event_list[] = {
 202         { "power", beat_power_event, 0 },
 203         { "reset", beat_reset_event, 0 },
 204 };
 205
 206 static int __init beat_register_event(void)
 207 {
 208         u64 path[4], data[2];
 209         int rc, i;
 210         unsigned int virq;
 211
 212         for (i = 0; i < ARRAY_SIZE(beat_event_list); i++) {
 213                 struct beat_event_list *ev = &beat_event_list[i];
 214
 215                 if (beat_construct_event_receive_port(data) != 0) {
 216                         printk(KERN_ERR "Beat: "
 217                                "cannot construct event receive port for %s\n",
 218                                ev->typecode);
 219                         return -EINVAL;
 220                 }
 221
 222                 virq = irq_create_mapping(NULL, data[0]);
 223                 if (virq == NO_IRQ) {
 224                         printk(KERN_ERR "Beat: failed to get virtual IRQ"
 225                                " for event receive port for %s\n",
 226                                ev->typecode);
 227                         beat_destruct_event_receive_port(data[0]);
 228                         return -EIO;
 229                 }
 230                 ev->virq = virq;
 231
 232                 rc = request_irq(virq, ev->handler, IRQF_DISABLED,
 233                                       ev->typecode, NULL);
 234                 if (rc != 0) {
 235                         printk(KERN_ERR "Beat: failed to request virtual IRQ"
 236                                " for event receive port for %s\n",
 237                                ev->typecode);
 238                         beat_destruct_event_receive_port(data[0]);
 239                         return rc;
 240                 }
 241
 242                 path[0] = 0x1000000065780000ul; /* 1,ex */
 243                 path[1] = 0x627574746f6e0000ul; /* button */
 244                 path[2] = 0;
 245                 strncpy((char *)&path[2], ev->typecode, 8);
 246                 path[3] = 0;
 247                 data[1] = 0;
 248
 249                 beat_create_repository_node(path, data);
 250         }
 251         return 0;
 252 }
 253
 254 static int __init beat_event_init(void)
 255 {
 256         if (!firmware_has_feature(FW_FEATURE_BEAT))
 257                 return -EINVAL;
 258
 259         beat_pm_poweroff_flag = 0;
 260         return beat_register_event();
 261 }
 262
 263 device_initcall(beat_event_init);
 264
 265 EXPORT_SYMBOL(beat_get_term_char);
 266 EXPORT_SYMBOL(beat_put_term_char);
 267 EXPORT_SYMBOL(beat_halt_code);