LXR qemu/hw/misc/sodimm-spd.c

   1/*
   2 * QEMU model of the SO-DIMM SPD EEPROM
   3 *
   4 * Copyright (c) 2018 Xilinx Inc.
   5 *
   6 * Written by Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
   7 *
   8 * Permission is hereby granted, free of charge, to any person obtaining a copy
   9 * of this software and associated documentation files (the "Software"), to deal
  10 * in the Software without restriction, including without limitation the rights
  11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12 * copies of the Software, and to permit persons to whom the Software is
  13 * furnished to do so, subject to the following conditions:
  14 *
  15 * The above copyright notice and this permission notice shall be included in
  16 * all copies or substantial portions of the Software.
  17 *
  18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24 * THE SOFTWARE.
  25 */
  26
  27#include "qemu/osdep.h"
  28#include "qemu/log.h"
  29#include "qapi/error.h"
  30#include "hw/i2c/i2c.h"
  31#include "hw/block/m24cxx.h"
  32#include "migration/vmstate.h"
  33#include "hw/qdev-properties.h"
  34
  35#define TYPE_SODIMM_SPD "sodimm-spd"
  36#define DEBUG_SODIMM_SPD     0
  37#define DPRINT(fmt, args...) \
  38        if (DEBUG_SODIMM_SPD) { \
  39            qemu_log("%s: " fmt, __func__, ## args); \
  40        }
  41
  42#define SODIMM_SPD(obj) \
  43     OBJECT_CHECK(SodimmSPD, (obj), TYPE_SODIMM_SPD)
  44
  45#define SODIMM_SPD_CLASS(obj) \
  46     OBJECT_CLASS_CHECK(SodimmSPDClass, (obj), TYPE_SODIMM_SPD)
  47
  48#define SODIMM_SPD_GET_CLASS(obj) \
  49     OBJECT_GET_CLASS(SodimmSPDClass, (obj), TYPE_SODIMM_SPD)
  50
  51
  52#define SPD_MANF_ID_INDEX 73
  53
  54
  55typedef struct SodimmSPD {
  56    M24CXXState parent_obj;
  57
  58} SodimmSPD;
  59
  60typedef struct SodimmSPDClass {
  61    I2CSlaveClass parent_class;
  62
  63    char manf_id[32];
  64} SodimmSPDClass;
  65
  66
  67static void sodimm_spd_reset(DeviceState *dev)
  68{
  69    M24CXXState *p = M24CXX(dev);
  70    SodimmSPDClass *sc = SODIMM_SPD_GET_CLASS(dev);
  71
  72    strcpy((char *)&p->storage[SPD_MANF_ID_INDEX], sc->manf_id);
  73}
  74
  75static void sodimm_spd_init(Object *obj)
  76{
  77    /* Each SPD block is 128 byte*/
  78    qdev_prop_set_uint16(DEVICE(obj), "size", 128);
  79}
  80
  81static void sodimm_spd_class_init(ObjectClass *klass, void *data)
  82{
  83    DeviceClass *dc = DEVICE_CLASS(klass);
  84    SodimmSPDClass *sc = SODIMM_SPD_CLASS(klass);
  85
  86    strcpy(sc->manf_id, (char *) data);
  87    dc->reset = sodimm_spd_reset;
  88}
  89
  90static const char *dev_info[] = {
  91    "4ATF51264HZ-2G6E1",
  92};
  93
  94static const TypeInfo sodimm_spd_info = {
  95    .name = TYPE_SODIMM_SPD,
  96    .parent = TYPE_M24CXX,
  97    .instance_size = sizeof(SodimmSPD),
  98    .class_init = sodimm_spd_class_init,
  99    .instance_init = sodimm_spd_init,
 100    .class_size = sizeof(SodimmSPDClass),
 101    .class_data = &dev_info[0],
 102};
 103
 104static void sodimm_spd_register_type(void)
 105{
 106    type_register_static(&sodimm_spd_info);
 107}
 108
 109type_init(sodimm_spd_register_type)
 110