arch/powerpc/platforms/cell/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/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;
  51 EXPORT_SYMBOL(beat_halt_code);
  52
  53 void beat_halt(void)
  54 {
  55         beat_shutdown_logical_partition(beat_halt_code);
  56 }
  57
  58 int beat_set_rtc_time(struct rtc_time *rtc_time)
  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
  69 void beat_get_rtc_time(struct rtc_time *rtc_time)
  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
 134 ssize_t beat_nvram_get_size(void)
 135 {
 136         return BEAT_NVRAM_SIZE;
 137 }
 138
 139 int beat_set_xdabr(unsigned long dabr)
 140 {
 141         if (beat_set_dabr(dabr, DABRX_KERNEL | DABRX_USER))
 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 }
 158 EXPORT_SYMBOL(beat_get_term_char);
 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 EXPORT_SYMBOL(beat_put_term_char);
 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 {
 178         beatic_deinit_IRQ();
 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;
 200         irq_handler_t handler;
 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);