1 /* 2 * QEMU LASI NIC i82596 emulation 3 * 4 * Copyright (c) 2019 Helge Deller <deller@gmx.de> 5 * This work is licensed under the GNU GPL license version 2 or later. 6 * 7 * 8 * On PA-RISC, this is the Network part of LASI chip. 9 * See: 10 * https://parisc.wiki.kernel.org/images-parisc/7/79/Lasi_ers.pdf 11 */ 12 13 #include "qemu/osdep.h" 14 #include "qemu/timer.h" 15 #include "hw/sysbus.h" 16 #include "net/eth.h" 17 #include "hw/net/lasi_82596.h" 18 #include "hw/net/i82596.h" 19 #include "trace.h" 20 #include "sysemu/sysemu.h" 21 #include "hw/qdev-properties.h" 22 #include "migration/vmstate.h" 23 24 #define PA_I82596_RESET 0 /* Offsets relative to LASI-LAN-Addr.*/ 25 #define PA_CPU_PORT_L_ACCESS 4 26 #define PA_CHANNEL_ATTENTION 8 27 #define PA_GET_MACADDR 12 28 29 #define SWAP32(x) (((uint32_t)(x) << 16) | ((((uint32_t)(x))) >> 16)) 30 31 static void lasi_82596_mem_write(void *opaque, hwaddr addr, 32 uint64_t val, unsigned size) 33 { 34 SysBusI82596State *d = opaque; 35 36 trace_lasi_82596_mem_writew(addr, val); 37 switch (addr) { 38 case PA_I82596_RESET: 39 i82596_h_reset(&d->state); 40 break; 41 case PA_CPU_PORT_L_ACCESS: 42 d->val_index++; 43 if (d->val_index == 0) { 44 uint32_t v = d->last_val | (val << 16); 45 v = v & ~0xff; 46 i82596_ioport_writew(&d->state, d->last_val & 0xff, v); 47 } 48 d->last_val = val; 49 break; 50 case PA_CHANNEL_ATTENTION: 51 i82596_ioport_writew(&d->state, PORT_CA, val); 52 break; 53 case PA_GET_MACADDR: 54 /* 55 * Provided for SeaBIOS only. Write MAC of Network card to addr @val. 56 * Needed for the PDC_LAN_STATION_ID_READ PDC call. 57 */ 58 address_space_rw(&address_space_memory, val, 59 MEMTXATTRS_UNSPECIFIED, d->state.conf.macaddr.a, ETH_ALEN, 1); 60 break; 61 } 62 } 63 64 static uint64_t lasi_82596_mem_read(void *opaque, hwaddr addr, 65 unsigned size) 66 { 67 SysBusI82596State *d = opaque; 68 uint32_t val; 69 70 if (addr == PA_GET_MACADDR) { 71 val = 0xBEEFBABE; 72 } else { 73 val = i82596_ioport_readw(&d->state, addr); 74 } 75 trace_lasi_82596_mem_readw(addr, val); 76 return val; 77 } 78 79 static const MemoryRegionOps lasi_82596_mem_ops = { 80 .read = lasi_82596_mem_read, 81 .write = lasi_82596_mem_write, 82 .endianness = DEVICE_BIG_ENDIAN, 83 .valid = { 84 .min_access_size = 4, 85 .max_access_size = 4, 86 }, 87 }; 88 89 static NetClientInfo net_lasi_82596_info = { 90 .type = NET_CLIENT_DRIVER_NIC, 91 .size = sizeof(NICState), 92 .can_receive = i82596_can_receive, 93 .receive = i82596_receive, 94 .link_status_changed = i82596_set_link_status, 95 }; 96 97 static const VMStateDescription vmstate_lasi_82596 = { 98 .name = "i82596", 99 .version_id = 1, 100 .minimum_version_id = 1, 101 .fields = (VMStateField[]) { 102 VMSTATE_STRUCT(state, SysBusI82596State, 0, vmstate_i82596, 103 I82596State), 104 VMSTATE_END_OF_LIST() 105 } 106 }; 107 108 static void lasi_82596_realize(DeviceState *dev, Error **errp) 109 { 110 SysBusI82596State *d = SYSBUS_I82596(dev); 111 I82596State *s = &d->state; 112 113 memory_region_init_io(&s->mmio, OBJECT(d), &lasi_82596_mem_ops, d, 114 "lasi_82596-mmio", PA_GET_MACADDR + 4); 115 116 i82596_common_init(dev, s, &net_lasi_82596_info); 117 } 118 119 SysBusI82596State *lasi_82596_init(MemoryRegion *addr_space, 120 hwaddr hpa, qemu_irq lan_irq) 121 { 122 DeviceState *dev; 123 SysBusI82596State *s; 124 static const MACAddr HP_MAC = { 125 .a = { 0x08, 0x00, 0x09, 0xef, 0x34, 0xf6 } }; 126 127 qemu_check_nic_model(&nd_table[0], TYPE_LASI_82596); 128 dev = qdev_create(NULL, TYPE_LASI_82596); 129 s = SYSBUS_I82596(dev); 130 s->state.irq = lan_irq; 131 qdev_set_nic_properties(dev, &nd_table[0]); 132 qdev_init_nofail(dev); 133 s->state.conf.macaddr = HP_MAC; /* set HP MAC prefix */ 134 135 /* LASI 82596 ports in main memory. */ 136 memory_region_add_subregion(addr_space, hpa, &s->state.mmio); 137 return s; 138 } 139 140 static void lasi_82596_reset(DeviceState *dev) 141 { 142 SysBusI82596State *d = SYSBUS_I82596(dev); 143 144 i82596_h_reset(&d->state); 145 } 146 147 static void lasi_82596_instance_init(Object *obj) 148 { 149 SysBusI82596State *d = SYSBUS_I82596(obj); 150 I82596State *s = &d->state; 151 152 device_add_bootindex_property(obj, &s->conf.bootindex, 153 "bootindex", "/ethernet-phy@0", 154 DEVICE(obj), NULL); 155 } 156 157 static Property lasi_82596_properties[] = { 158 DEFINE_NIC_PROPERTIES(SysBusI82596State, state.conf), 159 DEFINE_PROP_END_OF_LIST(), 160 }; 161 162 static void lasi_82596_class_init(ObjectClass *klass, void *data) 163 { 164 DeviceClass *dc = DEVICE_CLASS(klass); 165 166 dc->realize = lasi_82596_realize; 167 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories); 168 dc->fw_name = "ethernet"; 169 dc->reset = lasi_82596_reset; 170 dc->vmsd = &vmstate_lasi_82596; 171 dc->user_creatable = false; 172 device_class_set_props(dc, lasi_82596_properties); 173 } 174 175 static const TypeInfo lasi_82596_info = { 176 .name = TYPE_LASI_82596, 177 .parent = TYPE_SYS_BUS_DEVICE, 178 .instance_size = sizeof(SysBusI82596State), 179 .class_init = lasi_82596_class_init, 180 .instance_init = lasi_82596_instance_init, 181 }; 182 183 static void lasi_82596_register_types(void) 184 { 185 type_register_static(&lasi_82596_info); 186 } 187 188 type_init(lasi_82596_register_types) 189