aspeed_sdhci.c (6472B)
1 /* 2 * Aspeed SD Host 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/sd/aspeed_sdhci.h" 13 #include "qapi/error.h" 14 #include "hw/irq.h" 15 #include "migration/vmstate.h" 16 #include "hw/qdev-properties.h" 17 #include "trace.h" 18 19 #define ASPEED_SDHCI_INFO 0x00 20 #define ASPEED_SDHCI_INFO_SLOT1 (1 << 17) 21 #define ASPEED_SDHCI_INFO_SLOT0 (1 << 16) 22 #define ASPEED_SDHCI_INFO_RESET (1 << 0) 23 #define ASPEED_SDHCI_DEBOUNCE 0x04 24 #define ASPEED_SDHCI_DEBOUNCE_RESET 0x00000005 25 #define ASPEED_SDHCI_BUS 0x08 26 #define ASPEED_SDHCI_SDIO_140 0x10 27 #define ASPEED_SDHCI_SDIO_148 0x18 28 #define ASPEED_SDHCI_SDIO_240 0x20 29 #define ASPEED_SDHCI_SDIO_248 0x28 30 #define ASPEED_SDHCI_WP_POL 0xec 31 #define ASPEED_SDHCI_CARD_DET 0xf0 32 #define ASPEED_SDHCI_IRQ_STAT 0xfc 33 34 #define TO_REG(addr) ((addr) / sizeof(uint32_t)) 35 36 static uint64_t aspeed_sdhci_read(void *opaque, hwaddr addr, unsigned int size) 37 { 38 uint32_t val = 0; 39 AspeedSDHCIState *sdhci = opaque; 40 41 switch (addr) { 42 case ASPEED_SDHCI_SDIO_140: 43 val = (uint32_t)sdhci->slots[0].capareg; 44 break; 45 case ASPEED_SDHCI_SDIO_148: 46 val = (uint32_t)sdhci->slots[0].maxcurr; 47 break; 48 case ASPEED_SDHCI_SDIO_240: 49 val = (uint32_t)sdhci->slots[1].capareg; 50 break; 51 case ASPEED_SDHCI_SDIO_248: 52 val = (uint32_t)sdhci->slots[1].maxcurr; 53 break; 54 default: 55 if (addr < ASPEED_SDHCI_REG_SIZE) { 56 val = sdhci->regs[TO_REG(addr)]; 57 } else { 58 qemu_log_mask(LOG_GUEST_ERROR, 59 "%s: Out-of-bounds read at 0x%" HWADDR_PRIx "\n", 60 __func__, addr); 61 } 62 } 63 64 trace_aspeed_sdhci_read(addr, size, (uint64_t) val); 65 66 return (uint64_t)val; 67 } 68 69 static void aspeed_sdhci_write(void *opaque, hwaddr addr, uint64_t val, 70 unsigned int size) 71 { 72 AspeedSDHCIState *sdhci = opaque; 73 74 trace_aspeed_sdhci_write(addr, size, val); 75 76 switch (addr) { 77 case ASPEED_SDHCI_INFO: 78 /* The RESET bit automatically clears. */ 79 sdhci->regs[TO_REG(addr)] = (uint32_t)val & ~ASPEED_SDHCI_INFO_RESET; 80 break; 81 case ASPEED_SDHCI_SDIO_140: 82 sdhci->slots[0].capareg = (uint64_t)(uint32_t)val; 83 break; 84 case ASPEED_SDHCI_SDIO_148: 85 sdhci->slots[0].maxcurr = (uint64_t)(uint32_t)val; 86 break; 87 case ASPEED_SDHCI_SDIO_240: 88 sdhci->slots[1].capareg = (uint64_t)(uint32_t)val; 89 break; 90 case ASPEED_SDHCI_SDIO_248: 91 sdhci->slots[1].maxcurr = (uint64_t)(uint32_t)val; 92 break; 93 default: 94 if (addr < ASPEED_SDHCI_REG_SIZE) { 95 sdhci->regs[TO_REG(addr)] = (uint32_t)val; 96 } else { 97 qemu_log_mask(LOG_GUEST_ERROR, 98 "%s: Out-of-bounds write at 0x%" HWADDR_PRIx "\n", 99 __func__, addr); 100 } 101 } 102 } 103 104 static const MemoryRegionOps aspeed_sdhci_ops = { 105 .read = aspeed_sdhci_read, 106 .write = aspeed_sdhci_write, 107 .endianness = DEVICE_NATIVE_ENDIAN, 108 .valid.min_access_size = 4, 109 .valid.max_access_size = 4, 110 }; 111 112 static void aspeed_sdhci_set_irq(void *opaque, int n, int level) 113 { 114 AspeedSDHCIState *sdhci = opaque; 115 116 if (level) { 117 sdhci->regs[TO_REG(ASPEED_SDHCI_IRQ_STAT)] |= BIT(n); 118 119 qemu_irq_raise(sdhci->irq); 120 } else { 121 sdhci->regs[TO_REG(ASPEED_SDHCI_IRQ_STAT)] &= ~BIT(n); 122 123 qemu_irq_lower(sdhci->irq); 124 } 125 } 126 127 static void aspeed_sdhci_realize(DeviceState *dev, Error **errp) 128 { 129 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 130 AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev); 131 132 /* Create input irqs for the slots */ 133 qdev_init_gpio_in_named_with_opaque(DEVICE(sbd), aspeed_sdhci_set_irq, 134 sdhci, NULL, sdhci->num_slots); 135 136 sysbus_init_irq(sbd, &sdhci->irq); 137 memory_region_init_io(&sdhci->iomem, OBJECT(sdhci), &aspeed_sdhci_ops, 138 sdhci, TYPE_ASPEED_SDHCI, 0x1000); 139 sysbus_init_mmio(sbd, &sdhci->iomem); 140 141 for (int i = 0; i < sdhci->num_slots; ++i) { 142 Object *sdhci_slot = OBJECT(&sdhci->slots[i]); 143 SysBusDevice *sbd_slot = SYS_BUS_DEVICE(&sdhci->slots[i]); 144 145 if (!object_property_set_int(sdhci_slot, "sd-spec-version", 2, errp)) { 146 return; 147 } 148 149 if (!object_property_set_uint(sdhci_slot, "capareg", 150 ASPEED_SDHCI_CAPABILITIES, errp)) { 151 return; 152 } 153 154 if (!sysbus_realize(sbd_slot, errp)) { 155 return; 156 } 157 158 sysbus_connect_irq(sbd_slot, 0, qdev_get_gpio_in(DEVICE(sbd), i)); 159 memory_region_add_subregion(&sdhci->iomem, (i + 1) * 0x100, 160 &sdhci->slots[i].iomem); 161 } 162 } 163 164 static void aspeed_sdhci_reset(DeviceState *dev) 165 { 166 AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev); 167 168 memset(sdhci->regs, 0, ASPEED_SDHCI_REG_SIZE); 169 170 sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] = ASPEED_SDHCI_INFO_SLOT0; 171 if (sdhci->num_slots == 2) { 172 sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] |= ASPEED_SDHCI_INFO_SLOT1; 173 } 174 sdhci->regs[TO_REG(ASPEED_SDHCI_DEBOUNCE)] = ASPEED_SDHCI_DEBOUNCE_RESET; 175 } 176 177 static const VMStateDescription vmstate_aspeed_sdhci = { 178 .name = TYPE_ASPEED_SDHCI, 179 .version_id = 1, 180 .fields = (VMStateField[]) { 181 VMSTATE_UINT32_ARRAY(regs, AspeedSDHCIState, ASPEED_SDHCI_NUM_REGS), 182 VMSTATE_END_OF_LIST(), 183 }, 184 }; 185 186 static Property aspeed_sdhci_properties[] = { 187 DEFINE_PROP_UINT8("num-slots", AspeedSDHCIState, num_slots, 0), 188 DEFINE_PROP_END_OF_LIST(), 189 }; 190 191 static void aspeed_sdhci_class_init(ObjectClass *classp, void *data) 192 { 193 DeviceClass *dc = DEVICE_CLASS(classp); 194 195 dc->realize = aspeed_sdhci_realize; 196 dc->reset = aspeed_sdhci_reset; 197 dc->vmsd = &vmstate_aspeed_sdhci; 198 device_class_set_props(dc, aspeed_sdhci_properties); 199 } 200 201 static const TypeInfo aspeed_sdhci_info = { 202 .name = TYPE_ASPEED_SDHCI, 203 .parent = TYPE_SYS_BUS_DEVICE, 204 .instance_size = sizeof(AspeedSDHCIState), 205 .class_init = aspeed_sdhci_class_init, 206 }; 207 208 static void aspeed_sdhci_register_types(void) 209 { 210 type_register_static(&aspeed_sdhci_info); 211 } 212 213 type_init(aspeed_sdhci_register_types)