hw/net/lance.c

   1 /*
   2  * QEMU AMD PC-Net II (Am79C970A) emulation
   3  *
   4  * Copyright (c) 2004 Antony T Curtis
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 /* This software was written to be compatible with the specification:
  26  * AMD Am79C970A PCnet-PCI II Ethernet Controller Data-Sheet
  27  * AMD Publication# 19436  Rev:E  Amendment/0  Issue Date: June 2000
  28  */
  29
  30 /*
  31  * On Sparc32, this is the Lance (Am7990) part of chip STP2000 (Master I/O), also
  32  * produced as NCR89C100. See
  33  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C100.txt
  34  * and
  35  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR92C990.txt
  36  */
  37
  38 #include "hw/sysbus.h"
  39 #include "net/net.h"
  40 #include "qemu/timer.h"
  41 #include "qemu/sockets.h"
  42 #include "hw/sparc/sun4m.h"
  43 #include "pcnet.h"
  44 #include "trace.h"
  45 #include "sysemu/sysemu.h"
  46
  47 #define TYPE_LANCE "lance"
  48 #define SYSBUS_PCNET(obj) \
  49     OBJECT_CHECK(SysBusPCNetState, (obj), TYPE_LANCE)
  50
  51 typedef struct {
  52     SysBusDevice parent_obj;
  53
  54     PCNetState state;
  55 } SysBusPCNetState;
  56
  57 static void parent_lance_reset(void *opaque, int irq, int level)
  58 {
  59     SysBusPCNetState *d = opaque;
  60     if (level)
  61         pcnet_h_reset(&d->state);
  62 }
  63
  64 static void lance_mem_write(void *opaque, hwaddr addr,
  65                             uint64_t val, unsigned size)
  66 {
  67     SysBusPCNetState *d = opaque;
  68
  69     trace_lance_mem_writew(addr, val & 0xffff);
  70     pcnet_ioport_writew(&d->state, addr, val & 0xffff);
  71 }
  72
  73 static uint64_t lance_mem_read(void *opaque, hwaddr addr,
  74                                unsigned size)
  75 {
  76     SysBusPCNetState *d = opaque;
  77     uint32_t val;
  78
  79     val = pcnet_ioport_readw(&d->state, addr);
  80     trace_lance_mem_readw(addr, val & 0xffff);
  81     return val & 0xffff;
  82 }
  83
  84 static const MemoryRegionOps lance_mem_ops = {
  85     .read = lance_mem_read,
  86     .write = lance_mem_write,
  87     .endianness = DEVICE_NATIVE_ENDIAN,
  88     .valid = {
  89         .min_access_size = 2,
  90         .max_access_size = 2,
  91     },
  92 };
  93
  94 static NetClientInfo net_lance_info = {
  95     .type = NET_CLIENT_OPTIONS_KIND_NIC,
  96     .size = sizeof(NICState),
  97     .can_receive = pcnet_can_receive,
  98     .receive = pcnet_receive,
  99     .link_status_changed = pcnet_set_link_status,
 100 };
 101
 102 static const VMStateDescription vmstate_lance = {
 103     .name = "pcnet",
 104     .version_id = 3,
 105     .minimum_version_id = 2,
 106     .fields = (VMStateField[]) {
 107         VMSTATE_STRUCT(state, SysBusPCNetState, 0, vmstate_pcnet, PCNetState),
 108         VMSTATE_END_OF_LIST()
 109     }
 110 };
 111
 112 static int lance_init(SysBusDevice *sbd)
 113 {
 114     DeviceState *dev = DEVICE(sbd);
 115     SysBusPCNetState *d = SYSBUS_PCNET(dev);
 116     PCNetState *s = &d->state;
 117
 118     memory_region_init_io(&s->mmio, OBJECT(d), &lance_mem_ops, d,
 119                           "lance-mmio", 4);
 120
 121     qdev_init_gpio_in(dev, parent_lance_reset, 1);
 122
 123     sysbus_init_mmio(sbd, &s->mmio);
 124
 125     sysbus_init_irq(sbd, &s->irq);
 126
 127     s->phys_mem_read = ledma_memory_read;
 128     s->phys_mem_write = ledma_memory_write;
 129     return pcnet_common_init(dev, s, &net_lance_info);
 130 }
 131
 132 static void lance_reset(DeviceState *dev)
 133 {
 134     SysBusPCNetState *d = SYSBUS_PCNET(dev);
 135
 136     pcnet_h_reset(&d->state);
 137 }
 138
 139 static void lance_instance_init(Object *obj)
 140 {
 141     SysBusPCNetState *d = SYSBUS_PCNET(obj);
 142     PCNetState *s = &d->state;
 143
 144     device_add_bootindex_property(obj, &s->conf.bootindex,
 145                                   "bootindex", "/ethernet-phy@0",
 146                                   DEVICE(obj), NULL);
 147 }
 148
 149 static Property lance_properties[] = {
 150     DEFINE_PROP_PTR("dma", SysBusPCNetState, state.dma_opaque),
 151     DEFINE_NIC_PROPERTIES(SysBusPCNetState, state.conf),
 152     DEFINE_PROP_END_OF_LIST(),
 153 };
 154
 155 static void lance_class_init(ObjectClass *klass, void *data)
 156 {
 157     DeviceClass *dc = DEVICE_CLASS(klass);
 158     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 159
 160     k->init = lance_init;
 161     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
 162     dc->fw_name = "ethernet";
 163     dc->reset = lance_reset;
 164     dc->vmsd = &vmstate_lance;
 165     dc->props = lance_properties;
 166     /* Reason: pointer property "dma" */
 167     dc->cannot_instantiate_with_device_add_yet = true;
 168 }
 169
 170 static const TypeInfo lance_info = {
 171     .name          = TYPE_LANCE,
 172     .parent        = TYPE_SYS_BUS_DEVICE,
 173     .instance_size = sizeof(SysBusPCNetState),
 174     .class_init    = lance_class_init,
 175     .instance_init = lance_instance_init,
 176 };
 177
 178 static void lance_register_types(void)
 179 {
 180     type_register_static(&lance_info);
 181 }
 182
 183 type_init(lance_register_types)