include/hw/timer/aspeed_timer.h

   1 /*
   2  *  ASPEED AST2400 Timer
   3  *
   4  *  Andrew Jeffery <andrew@aj.id.au>
   5  *
   6  *  Copyright (C) 2016 IBM Corp.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22 #ifndef ASPEED_TIMER_H
  23 #define ASPEED_TIMER_H
  24
  25 #include "qemu/timer.h"
  26 #include "hw/misc/aspeed_scu.h"
  27 #include "qom/object.h"
  28
  29 #define TYPE_ASPEED_TIMER "aspeed.timer"
  30 OBJECT_DECLARE_TYPE(AspeedTimerCtrlState, AspeedTimerClass, ASPEED_TIMER)
  31 #define TYPE_ASPEED_2400_TIMER TYPE_ASPEED_TIMER "-ast2400"
  32 #define TYPE_ASPEED_2500_TIMER TYPE_ASPEED_TIMER "-ast2500"
  33 #define TYPE_ASPEED_2600_TIMER TYPE_ASPEED_TIMER "-ast2600"
  34
  35 #define ASPEED_TIMER_NR_TIMERS 8
  36
  37 typedef struct AspeedTimer {
  38     qemu_irq irq;
  39
  40     uint8_t id;
  41     QEMUTimer timer;
  42
  43     /**
  44      * Track the line level as the ASPEED timers implement edge triggered
  45      * interrupts, signalling with both the rising and falling edge.
  46      */
  47     int32_t level;
  48     uint32_t reload;
  49     uint32_t match[2];
  50     uint64_t start;
  51 } AspeedTimer;
  52
  53 struct AspeedTimerCtrlState {
  54     /*< private >*/
  55     SysBusDevice parent;
  56
  57     /*< public >*/
  58     MemoryRegion iomem;
  59
  60     uint32_t ctrl;
  61     uint32_t ctrl2;
  62     uint32_t ctrl3;
  63     uint32_t irq_sts;
  64     AspeedTimer timers[ASPEED_TIMER_NR_TIMERS];
  65
  66     AspeedSCUState *scu;
  67 };
  68
  69
  70 struct AspeedTimerClass {
  71     SysBusDeviceClass parent_class;
  72
  73     uint64_t (*read)(AspeedTimerCtrlState *s, hwaddr offset);
  74     void (*write)(AspeedTimerCtrlState *s, hwaddr offset, uint64_t value);
  75 };
  76
  77 #endif /* ASPEED_TIMER_H */