1 /* 2 * QEMU ADB support 3 * 4 * Copyright (c) 2004 Fabrice Bellard 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 #include "qemu/osdep.h" 26 #include "hw/input/adb.h" 27 #include "hw/qdev-properties.h" 28 #include "migration/vmstate.h" 29 #include "qemu/module.h" 30 #include "adb-internal.h" 31 32 /* error codes */ 33 #define ADB_RET_NOTPRESENT (-2) 34 35 static void adb_device_reset(ADBDevice *d) 36 { 37 qdev_reset_all(DEVICE(d)); 38 } 39 40 int adb_request(ADBBusState *s, uint8_t *obuf, const uint8_t *buf, int len) 41 { 42 ADBDevice *d; 43 int devaddr, cmd, i; 44 45 cmd = buf[0] & 0xf; 46 if (cmd == ADB_BUSRESET) { 47 for(i = 0; i < s->nb_devices; i++) { 48 d = s->devices[i]; 49 adb_device_reset(d); 50 } 51 return 0; 52 } 53 devaddr = buf[0] >> 4; 54 for(i = 0; i < s->nb_devices; i++) { 55 d = s->devices[i]; 56 if (d->devaddr == devaddr) { 57 ADBDeviceClass *adc = ADB_DEVICE_GET_CLASS(d); 58 return adc->devreq(d, obuf, buf, len); 59 } 60 } 61 return ADB_RET_NOTPRESENT; 62 } 63 64 /* XXX: move that to cuda ? */ 65 int adb_poll(ADBBusState *s, uint8_t *obuf, uint16_t poll_mask) 66 { 67 ADBDevice *d; 68 int olen, i; 69 uint8_t buf[1]; 70 71 olen = 0; 72 for(i = 0; i < s->nb_devices; i++) { 73 if (s->poll_index >= s->nb_devices) 74 s->poll_index = 0; 75 d = s->devices[s->poll_index]; 76 if ((1 << d->devaddr) & poll_mask) { 77 buf[0] = ADB_READREG | (d->devaddr << 4); 78 olen = adb_request(s, obuf + 1, buf, 1); 79 /* if there is data, we poll again the same device */ 80 if (olen > 0) { 81 obuf[0] = buf[0]; 82 olen++; 83 break; 84 } 85 } 86 s->poll_index++; 87 } 88 return olen; 89 } 90 91 static const TypeInfo adb_bus_type_info = { 92 .name = TYPE_ADB_BUS, 93 .parent = TYPE_BUS, 94 .instance_size = sizeof(ADBBusState), 95 }; 96 97 const VMStateDescription vmstate_adb_device = { 98 .name = "adb_device", 99 .version_id = 0, 100 .minimum_version_id = 0, 101 .fields = (VMStateField[]) { 102 VMSTATE_INT32(devaddr, ADBDevice), 103 VMSTATE_INT32(handler, ADBDevice), 104 VMSTATE_END_OF_LIST() 105 } 106 }; 107 108 static void adb_device_realizefn(DeviceState *dev, Error **errp) 109 { 110 ADBDevice *d = ADB_DEVICE(dev); 111 ADBBusState *bus = ADB_BUS(qdev_get_parent_bus(dev)); 112 113 if (bus->nb_devices >= MAX_ADB_DEVICES) { 114 return; 115 } 116 117 bus->devices[bus->nb_devices++] = d; 118 } 119 120 static Property adb_device_properties[] = { 121 DEFINE_PROP_BOOL("disable-direct-reg3-writes", ADBDevice, 122 disable_direct_reg3_writes, false), 123 DEFINE_PROP_END_OF_LIST(), 124 }; 125 126 static void adb_device_class_init(ObjectClass *oc, void *data) 127 { 128 DeviceClass *dc = DEVICE_CLASS(oc); 129 130 dc->realize = adb_device_realizefn; 131 device_class_set_props(dc, adb_device_properties); 132 dc->bus_type = TYPE_ADB_BUS; 133 } 134 135 static const TypeInfo adb_device_type_info = { 136 .name = TYPE_ADB_DEVICE, 137 .parent = TYPE_DEVICE, 138 .instance_size = sizeof(ADBDevice), 139 .abstract = true, 140 .class_init = adb_device_class_init, 141 }; 142 143 static void adb_register_types(void) 144 { 145 type_register_static(&adb_bus_type_info); 146 type_register_static(&adb_device_type_info); 147 } 148 149 type_init(adb_register_types) 150