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 "hw/sysbus.h" 26 #include "trace.h" 27 28 /* 29 * In addition to Crystal CS4231 there is a DMA controller on Sparc. 30 */ 31 #define CS_SIZE 0x40 32 #define CS_REGS 16 33 #define CS_DREGS 32 34 #define CS_MAXDREG (CS_DREGS - 1) 35 36 #define TYPE_CS4231 "SUNW,CS4231" 37 #define CS4231(obj) \ 38 OBJECT_CHECK(CSState, (obj), TYPE_CS4231) 39 40 typedef struct CSState { 41 SysBusDevice parent_obj; 42 43 MemoryRegion iomem; 44 qemu_irq irq; 45 uint32_t regs[CS_REGS]; 46 uint8_t dregs[CS_DREGS]; 47 } CSState; 48 49 #define CS_RAP(s) ((s)->regs[0] & CS_MAXDREG) 50 #define CS_VER 0xa0 51 #define CS_CDC_VER 0x8a 52 53 static void cs_reset(DeviceState *d) 54 { 55 CSState *s = CS4231(d); 56 57 memset(s->regs, 0, CS_REGS * 4); 58 memset(s->dregs, 0, CS_DREGS); 59 s->dregs[12] = CS_CDC_VER; 60 s->dregs[25] = CS_VER; 61 } 62 63 static uint64_t cs_mem_read(void *opaque, hwaddr addr, 64 unsigned size) 65 { 66 CSState *s = opaque; 67 uint32_t saddr, ret; 68 69 saddr = addr >> 2; 70 switch (saddr) { 71 case 1: 72 switch (CS_RAP(s)) { 73 case 3: // Write only 74 ret = 0; 75 break; 76 default: 77 ret = s->dregs[CS_RAP(s)]; 78 break; 79 } 80 trace_cs4231_mem_readl_dreg(CS_RAP(s), ret); 81 break; 82 default: 83 ret = s->regs[saddr]; 84 trace_cs4231_mem_readl_reg(saddr, ret); 85 break; 86 } 87 return ret; 88 } 89 90 static void cs_mem_write(void *opaque, hwaddr addr, 91 uint64_t val, unsigned size) 92 { 93 CSState *s = opaque; 94 uint32_t saddr; 95 96 saddr = addr >> 2; 97 trace_cs4231_mem_writel_reg(saddr, s->regs[saddr], val); 98 switch (saddr) { 99 case 1: 100 trace_cs4231_mem_writel_dreg(CS_RAP(s), s->dregs[CS_RAP(s)], val); 101 switch(CS_RAP(s)) { 102 case 11: 103 case 25: // Read only 104 break; 105 case 12: 106 val &= 0x40; 107 val |= CS_CDC_VER; // Codec version 108 s->dregs[CS_RAP(s)] = val; 109 break; 110 default: 111 s->dregs[CS_RAP(s)] = val; 112 break; 113 } 114 break; 115 case 2: // Read only 116 break; 117 case 4: 118 if (val & 1) { 119 cs_reset(DEVICE(s)); 120 } 121 val &= 0x7f; 122 s->regs[saddr] = val; 123 break; 124 default: 125 s->regs[saddr] = val; 126 break; 127 } 128 } 129 130 static const MemoryRegionOps cs_mem_ops = { 131 .read = cs_mem_read, 132 .write = cs_mem_write, 133 .endianness = DEVICE_NATIVE_ENDIAN, 134 }; 135 136 static const VMStateDescription vmstate_cs4231 = { 137 .name ="cs4231", 138 .version_id = 1, 139 .minimum_version_id = 1, 140 .minimum_version_id_old = 1, 141 .fields = (VMStateField []) { 142 VMSTATE_UINT32_ARRAY(regs, CSState, CS_REGS), 143 VMSTATE_UINT8_ARRAY(dregs, CSState, CS_DREGS), 144 VMSTATE_END_OF_LIST() 145 } 146 }; 147 148 static int cs4231_init1(SysBusDevice *dev) 149 { 150 CSState *s = CS4231(dev); 151 152 memory_region_init_io(&s->iomem, OBJECT(s), &cs_mem_ops, s, "cs4321", 153 CS_SIZE); 154 sysbus_init_mmio(dev, &s->iomem); 155 sysbus_init_irq(dev, &s->irq); 156 157 return 0; 158 } 159 160 static Property cs4231_properties[] = { 161 {.name = NULL}, 162 }; 163 164 static void cs4231_class_init(ObjectClass *klass, void *data) 165 { 166 DeviceClass *dc = DEVICE_CLASS(klass); 167 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); 168 169 k->init = cs4231_init1; 170 dc->reset = cs_reset; 171 dc->vmsd = &vmstate_cs4231; 172 dc->props = cs4231_properties; 173 } 174 175 static const TypeInfo cs4231_info = { 176 .name = TYPE_CS4231, 177 .parent = TYPE_SYS_BUS_DEVICE, 178 .instance_size = sizeof(CSState), 179 .class_init = cs4231_class_init, 180 }; 181 182 static void cs4231_register_types(void) 183 { 184 type_register_static(&cs4231_info); 185 } 186 187 type_init(cs4231_register_types) 188