aspeed_xdma.c (7613B)
1 /* 2 * ASPEED XDMA Controller 3 * Eddie James <eajames@linux.ibm.com> 4 * 5 * Copyright (C) 2019 IBM Corp 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qemu/log.h" 11 #include "qemu/error-report.h" 12 #include "hw/irq.h" 13 #include "hw/misc/aspeed_xdma.h" 14 #include "migration/vmstate.h" 15 #include "qapi/error.h" 16 17 #include "trace.h" 18 19 #define XDMA_BMC_CMDQ_ADDR 0x10 20 #define XDMA_BMC_CMDQ_ENDP 0x14 21 #define XDMA_BMC_CMDQ_WRP 0x18 22 #define XDMA_BMC_CMDQ_W_MASK 0x0003FFFF 23 #define XDMA_BMC_CMDQ_RDP 0x1C 24 #define XDMA_BMC_CMDQ_RDP_MAGIC 0xEE882266 25 #define XDMA_IRQ_ENG_CTRL 0x20 26 #define XDMA_IRQ_ENG_CTRL_US_COMP BIT(4) 27 #define XDMA_IRQ_ENG_CTRL_DS_COMP BIT(5) 28 #define XDMA_IRQ_ENG_CTRL_W_MASK 0xBFEFF07F 29 #define XDMA_IRQ_ENG_STAT 0x24 30 #define XDMA_IRQ_ENG_STAT_US_COMP BIT(4) 31 #define XDMA_IRQ_ENG_STAT_DS_COMP BIT(5) 32 #define XDMA_IRQ_ENG_STAT_RESET 0xF8000000 33 34 #define XDMA_AST2600_BMC_CMDQ_ADDR 0x14 35 #define XDMA_AST2600_BMC_CMDQ_ENDP 0x18 36 #define XDMA_AST2600_BMC_CMDQ_WRP 0x1c 37 #define XDMA_AST2600_BMC_CMDQ_RDP 0x20 38 #define XDMA_AST2600_IRQ_CTRL 0x38 39 #define XDMA_AST2600_IRQ_CTRL_US_COMP BIT(16) 40 #define XDMA_AST2600_IRQ_CTRL_DS_COMP BIT(17) 41 #define XDMA_AST2600_IRQ_CTRL_W_MASK 0x017003FF 42 #define XDMA_AST2600_IRQ_STATUS 0x3c 43 #define XDMA_AST2600_IRQ_STATUS_US_COMP BIT(16) 44 #define XDMA_AST2600_IRQ_STATUS_DS_COMP BIT(17) 45 46 #define XDMA_MEM_SIZE 0x1000 47 48 #define TO_REG(addr) ((addr) / sizeof(uint32_t)) 49 50 static uint64_t aspeed_xdma_read(void *opaque, hwaddr addr, unsigned int size) 51 { 52 uint32_t val = 0; 53 AspeedXDMAState *xdma = opaque; 54 55 if (addr < ASPEED_XDMA_REG_SIZE) { 56 val = xdma->regs[TO_REG(addr)]; 57 } 58 59 return (uint64_t)val; 60 } 61 62 static void aspeed_xdma_write(void *opaque, hwaddr addr, uint64_t val, 63 unsigned int size) 64 { 65 unsigned int idx; 66 uint32_t val32 = (uint32_t)val; 67 AspeedXDMAState *xdma = opaque; 68 AspeedXDMAClass *axc = ASPEED_XDMA_GET_CLASS(xdma); 69 70 if (addr >= ASPEED_XDMA_REG_SIZE) { 71 return; 72 } 73 74 if (addr == axc->cmdq_endp) { 75 xdma->regs[TO_REG(addr)] = val32 & XDMA_BMC_CMDQ_W_MASK; 76 } else if (addr == axc->cmdq_wrp) { 77 idx = TO_REG(addr); 78 xdma->regs[idx] = val32 & XDMA_BMC_CMDQ_W_MASK; 79 xdma->regs[TO_REG(axc->cmdq_rdp)] = xdma->regs[idx]; 80 81 trace_aspeed_xdma_write(addr, val); 82 83 if (xdma->bmc_cmdq_readp_set) { 84 xdma->bmc_cmdq_readp_set = 0; 85 } else { 86 xdma->regs[TO_REG(axc->intr_status)] |= axc->intr_complete; 87 88 if (xdma->regs[TO_REG(axc->intr_ctrl)] & axc->intr_complete) { 89 qemu_irq_raise(xdma->irq); 90 } 91 } 92 } else if (addr == axc->cmdq_rdp) { 93 trace_aspeed_xdma_write(addr, val); 94 95 if (val32 == XDMA_BMC_CMDQ_RDP_MAGIC) { 96 xdma->bmc_cmdq_readp_set = 1; 97 } 98 } else if (addr == axc->intr_ctrl) { 99 xdma->regs[TO_REG(addr)] = val32 & axc->intr_ctrl_mask; 100 } else if (addr == axc->intr_status) { 101 trace_aspeed_xdma_write(addr, val); 102 103 idx = TO_REG(addr); 104 if (val32 & axc->intr_complete) { 105 xdma->regs[idx] &= ~axc->intr_complete; 106 qemu_irq_lower(xdma->irq); 107 } 108 } else { 109 xdma->regs[TO_REG(addr)] = val32; 110 } 111 } 112 113 static const MemoryRegionOps aspeed_xdma_ops = { 114 .read = aspeed_xdma_read, 115 .write = aspeed_xdma_write, 116 .endianness = DEVICE_NATIVE_ENDIAN, 117 .valid.min_access_size = 4, 118 .valid.max_access_size = 4, 119 }; 120 121 static void aspeed_xdma_realize(DeviceState *dev, Error **errp) 122 { 123 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 124 AspeedXDMAState *xdma = ASPEED_XDMA(dev); 125 126 sysbus_init_irq(sbd, &xdma->irq); 127 memory_region_init_io(&xdma->iomem, OBJECT(xdma), &aspeed_xdma_ops, xdma, 128 TYPE_ASPEED_XDMA, XDMA_MEM_SIZE); 129 sysbus_init_mmio(sbd, &xdma->iomem); 130 } 131 132 static void aspeed_xdma_reset(DeviceState *dev) 133 { 134 AspeedXDMAState *xdma = ASPEED_XDMA(dev); 135 AspeedXDMAClass *axc = ASPEED_XDMA_GET_CLASS(xdma); 136 137 xdma->bmc_cmdq_readp_set = 0; 138 memset(xdma->regs, 0, ASPEED_XDMA_REG_SIZE); 139 xdma->regs[TO_REG(axc->intr_status)] = XDMA_IRQ_ENG_STAT_RESET; 140 141 qemu_irq_lower(xdma->irq); 142 } 143 144 static const VMStateDescription aspeed_xdma_vmstate = { 145 .name = TYPE_ASPEED_XDMA, 146 .version_id = 1, 147 .fields = (VMStateField[]) { 148 VMSTATE_UINT32_ARRAY(regs, AspeedXDMAState, ASPEED_XDMA_NUM_REGS), 149 VMSTATE_END_OF_LIST(), 150 }, 151 }; 152 153 static void aspeed_2600_xdma_class_init(ObjectClass *klass, void *data) 154 { 155 DeviceClass *dc = DEVICE_CLASS(klass); 156 AspeedXDMAClass *axc = ASPEED_XDMA_CLASS(klass); 157 158 dc->desc = "ASPEED 2600 XDMA Controller"; 159 160 axc->cmdq_endp = XDMA_AST2600_BMC_CMDQ_ENDP; 161 axc->cmdq_wrp = XDMA_AST2600_BMC_CMDQ_WRP; 162 axc->cmdq_rdp = XDMA_AST2600_BMC_CMDQ_RDP; 163 axc->intr_ctrl = XDMA_AST2600_IRQ_CTRL; 164 axc->intr_ctrl_mask = XDMA_AST2600_IRQ_CTRL_W_MASK; 165 axc->intr_status = XDMA_AST2600_IRQ_STATUS; 166 axc->intr_complete = XDMA_AST2600_IRQ_STATUS_US_COMP | 167 XDMA_AST2600_IRQ_STATUS_DS_COMP; 168 } 169 170 static const TypeInfo aspeed_2600_xdma_info = { 171 .name = TYPE_ASPEED_2600_XDMA, 172 .parent = TYPE_ASPEED_XDMA, 173 .class_init = aspeed_2600_xdma_class_init, 174 }; 175 176 static void aspeed_2500_xdma_class_init(ObjectClass *klass, void *data) 177 { 178 DeviceClass *dc = DEVICE_CLASS(klass); 179 AspeedXDMAClass *axc = ASPEED_XDMA_CLASS(klass); 180 181 dc->desc = "ASPEED 2500 XDMA Controller"; 182 183 axc->cmdq_endp = XDMA_BMC_CMDQ_ENDP; 184 axc->cmdq_wrp = XDMA_BMC_CMDQ_WRP; 185 axc->cmdq_rdp = XDMA_BMC_CMDQ_RDP; 186 axc->intr_ctrl = XDMA_IRQ_ENG_CTRL; 187 axc->intr_ctrl_mask = XDMA_IRQ_ENG_CTRL_W_MASK; 188 axc->intr_status = XDMA_IRQ_ENG_STAT; 189 axc->intr_complete = XDMA_IRQ_ENG_STAT_US_COMP | XDMA_IRQ_ENG_STAT_DS_COMP; 190 }; 191 192 static const TypeInfo aspeed_2500_xdma_info = { 193 .name = TYPE_ASPEED_2500_XDMA, 194 .parent = TYPE_ASPEED_XDMA, 195 .class_init = aspeed_2500_xdma_class_init, 196 }; 197 198 static void aspeed_2400_xdma_class_init(ObjectClass *klass, void *data) 199 { 200 DeviceClass *dc = DEVICE_CLASS(klass); 201 AspeedXDMAClass *axc = ASPEED_XDMA_CLASS(klass); 202 203 dc->desc = "ASPEED 2400 XDMA Controller"; 204 205 axc->cmdq_endp = XDMA_BMC_CMDQ_ENDP; 206 axc->cmdq_wrp = XDMA_BMC_CMDQ_WRP; 207 axc->cmdq_rdp = XDMA_BMC_CMDQ_RDP; 208 axc->intr_ctrl = XDMA_IRQ_ENG_CTRL; 209 axc->intr_ctrl_mask = XDMA_IRQ_ENG_CTRL_W_MASK; 210 axc->intr_status = XDMA_IRQ_ENG_STAT; 211 axc->intr_complete = XDMA_IRQ_ENG_STAT_US_COMP | XDMA_IRQ_ENG_STAT_DS_COMP; 212 }; 213 214 static const TypeInfo aspeed_2400_xdma_info = { 215 .name = TYPE_ASPEED_2400_XDMA, 216 .parent = TYPE_ASPEED_XDMA, 217 .class_init = aspeed_2400_xdma_class_init, 218 }; 219 220 static void aspeed_xdma_class_init(ObjectClass *classp, void *data) 221 { 222 DeviceClass *dc = DEVICE_CLASS(classp); 223 224 dc->realize = aspeed_xdma_realize; 225 dc->reset = aspeed_xdma_reset; 226 dc->vmsd = &aspeed_xdma_vmstate; 227 } 228 229 static const TypeInfo aspeed_xdma_info = { 230 .name = TYPE_ASPEED_XDMA, 231 .parent = TYPE_SYS_BUS_DEVICE, 232 .instance_size = sizeof(AspeedXDMAState), 233 .class_init = aspeed_xdma_class_init, 234 .class_size = sizeof(AspeedXDMAClass), 235 .abstract = true, 236 }; 237 238 static void aspeed_xdma_register_type(void) 239 { 240 type_register_static(&aspeed_xdma_info); 241 type_register_static(&aspeed_2400_xdma_info); 242 type_register_static(&aspeed_2500_xdma_info); 243 type_register_static(&aspeed_2600_xdma_info); 244 } 245 type_init(aspeed_xdma_register_type);