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