hw/apohw.c

   1 /*
   2  *  Virtual I/O PCI card + simple terminal connected
   3  *  to this card via 8bit parallel bus.
   4  *  Hardware used for teaching A0b36APO:
   5  *  https://edux.feld.cvut.cz/courses/A0B36APO/tutorials/10/start
   6  *
   7  *  Copyright (C) 2012 Rostislav Lisovy (lisovy@gmail.com)
   8  *
   9  *  Licensed under GPLv3 license
  10 */
  11
  12 #include "hw.h"
  13 #include "pci.h"
  14 #include <unistd.h>
  15
  16 #define PCI_VENDOR_ID_ALTERA                            0x1172
  17 #define PCI_DEVICE_ID_ALTERA_CORPORATION_DEVICE         0x1f32
  18
  19 typedef struct apohw_state_t {
  20         uint8_t emul_bus_ctrl;
  21         uint8_t emul_bus_data_out;
  22         uint8_t emul_bus_data_in;
  23 } apohw_state_t;
  24
  25 typedef struct {
  26         PCIDevice dev;
  27         apohw_state_t apohw;
  28 } apohw_pci_state_t;
  29
  30 /* ------------------------------------------------------------------------- */
  31
  32 static int pci_apohw_init(PCIDevice *pci_dev)
  33 {
  34         printf("apohw started\n");
  35         return 0;
  36 }
  37
  38 static int pci_apohw_exit(PCIDevice *pci_dev)
  39 {
  40         return 0;
  41 }
  42
  43 const VMStateDescription apohw_vmsd = {
  44         .name = "apohw",
  45         .version_id = 2, // Wut?
  46         .minimum_version_id = 0,
  47         .minimum_version_id_old = 0,
  48         .fields = (VMStateField []) {
  49                 VMSTATE_UNUSED(0x8040),
  50                 VMSTATE_UINT8(emul_bus_ctrl, apohw_state_t),
  51                 VMSTATE_UNUSED(0x20),
  52                 VMSTATE_UINT8(emul_bus_data_out, apohw_state_t),
  53                 VMSTATE_UNUSED(0x20),
  54                 VMSTATE_UINT8(emul_bus_data_in, apohw_state_t),
  55                 VMSTATE_END_OF_LIST()
  56         }
  57 };
  58
  59 static const VMStateDescription apohw_pci_vmsd = {
  60         .name = "apohw",
  61         .version_id = 3, // Wat?
  62         .minimum_version_id = 3,
  63         .minimum_version_id_old = 3,
  64         .fields = (VMStateField[]) {
  65             VMSTATE_PCI_DEVICE(dev, apohw_pci_state_t),
  66             VMSTATE_STRUCT(apohw, apohw_pci_state_t, 0, apohw_vmsd, apohw_state_t),
  67             VMSTATE_END_OF_LIST()
  68         }
  69 };
  70
  71 static void apohw_class_init(ObjectClass *klass, void *data)
  72 {
  73         PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
  74
  75         k->init = pci_apohw_init;
  76         k->exit = pci_apohw_exit;
  77         k->vendor_id = PCI_VENDOR_ID_ALTERA;
  78         k->device_id = PCI_DEVICE_ID_ALTERA_CORPORATION_DEVICE;
  79         k->class_id = PCI_CLASS_COMMUNICATION_OTHER;
  80 }
  81
  82 static DeviceInfo apohw_info = {
  83         .name = "apohw",
  84         .size = sizeof(apohw_pci_state_t),
  85         .vmsd = &apohw_pci_vmsd,
  86         .class_init = apohw_class_init,
  87 };
  88
  89 static void apohw_register_device(void)
  90 {
  91         pci_qdev_register(&apohw_info);
  92 }
  93
  94 device_init(apohw_register_device)