1 /* 2 * QEMU Crystal CS4231 audio chip emulation 3 * 4 * Copyright (c) 2006 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/sysbus.h" 27 #include "migration/vmstate.h" 28 #include "qemu/module.h" 29 #include "trace.h" 30 #include "qom/object.h" 31 32 /* 33 * In addition to Crystal CS4231 there is a DMA controller on Sparc. 34 */ 35 #define CS_SIZE 0x40 36 #define CS_REGS 16 37 #define CS_DREGS 32 38 #define CS_MAXDREG (CS_DREGS - 1) 39 40 #define TYPE_CS4231 "sun-CS4231" 41 typedef struct CSState CSState; 42 DECLARE_INSTANCE_CHECKER(CSState, CS4231, 43 TYPE_CS4231) 44 45 struct CSState { 46 SysBusDevice parent_obj; 47 48 MemoryRegion iomem; 49 qemu_irq irq; 50 uint32_t regs[CS_REGS]; 51 uint8_t dregs[CS_DREGS]; 52 }; 53 54 #define CS_RAP(s) ((s)->regs[0] & CS_MAXDREG) 55 #define CS_VER 0xa0 56 #define CS_CDC_VER 0x8a 57 58 static void cs_reset(DeviceState *d) 59 { 60 CSState *s = CS4231(d); 61 62 memset(s->regs, 0, CS_REGS * 4); 63 memset(s->dregs, 0, CS_DREGS); 64 s->dregs[12] = CS_CDC_VER; 65 s->dregs[25] = CS_VER; 66 } 67 68 static uint64_t cs_mem_read(void *opaque, hwaddr addr, 69 unsigned size) 70 { 71 CSState *s = opaque; 72 uint32_t saddr, ret; 73 74 saddr = addr >> 2; 75 switch (saddr) { 76 case 1: 77 switch (CS_RAP(s)) { 78 case 3: // Write only 79 ret = 0; 80 break; 81 default: 82 ret = s->dregs[CS_RAP(s)]; 83 break; 84 } 85 trace_cs4231_mem_readl_dreg(CS_RAP(s), ret); 86 break; 87 default: 88 ret = s->regs[saddr]; 89 trace_cs4231_mem_readl_reg(saddr, ret); 90 break; 91 } 92 return ret; 93 } 94 95 static void cs_mem_write(void *opaque, hwaddr addr, 96 uint64_t val, unsigned size) 97 { 98 CSState *s = opaque; 99 uint32_t saddr; 100 101 saddr = addr >> 2; 102 trace_cs4231_mem_writel_reg(saddr, s->regs[saddr], val); 103 switch (saddr) { 104 case 1: 105 trace_cs4231_mem_writel_dreg(CS_RAP(s), s->dregs[CS_RAP(s)], val); 106 switch(CS_RAP(s)) { 107 case 11: 108 case 25: // Read only 109 break; 110 case 12: 111 val &= 0x40; 112 val |= CS_CDC_VER; // Codec version 113 s->dregs[CS_RAP(s)] = val; 114 break; 115 default: 116 s->dregs[CS_RAP(s)] = val; 117 break; 118 } 119 break; 120 case 2: // Read only 121 break; 122 case 4: 123 if (val & 1) { 124 cs_reset(DEVICE(s)); 125 } 126 val &= 0x7f; 127 s->regs[saddr] = val; 128 break; 129 default: 130 s->regs[saddr] = val; 131 break; 132 } 133 } 134 135 static const MemoryRegionOps cs_mem_ops = { 136 .read = cs_mem_read, 137 .write = cs_mem_write, 138 .endianness = DEVICE_NATIVE_ENDIAN, 139 }; 140 141 static const VMStateDescription vmstate_cs4231 = { 142 .name ="cs4231", 143 .version_id = 1, 144 .minimum_version_id = 1, 145 .fields = (const VMStateField[]) { 146 VMSTATE_UINT32_ARRAY(regs, CSState, CS_REGS), 147 VMSTATE_UINT8_ARRAY(dregs, CSState, CS_DREGS), 148 VMSTATE_END_OF_LIST() 149 } 150 }; 151 152 static void cs4231_init(Object *obj) 153 { 154 CSState *s = CS4231(obj); 155 SysBusDevice *dev = SYS_BUS_DEVICE(obj); 156 157 memory_region_init_io(&s->iomem, obj, &cs_mem_ops, s, "cs4321", 158 CS_SIZE); 159 sysbus_init_mmio(dev, &s->iomem); 160 sysbus_init_irq(dev, &s->irq); 161 } 162 163 static void cs4231_class_init(ObjectClass *klass, void *data) 164 { 165 DeviceClass *dc = DEVICE_CLASS(klass); 166 167 device_class_set_legacy_reset(dc, cs_reset); 168 dc->vmsd = &vmstate_cs4231; 169 } 170 171 static const TypeInfo cs4231_info = { 172 .name = TYPE_CS4231, 173 .parent = TYPE_SYS_BUS_DEVICE, 174 .instance_size = sizeof(CSState), 175 .instance_init = cs4231_init, 176 .class_init = cs4231_class_init, 177 }; 178 179 static void cs4231_register_types(void) 180 { 181 type_register_static(&cs4231_info); 182 } 183 184 type_init(cs4231_register_types) 185