1 /* 2 * Aspeed SD Host Controller 3 * Eddie James <eajames@linux.ibm.com> 4 * 5 * Copyright (C) 2019 IBM Corp 6 * SPDX-License-Identifer: 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 18 #define ASPEED_SDHCI_INFO 0x00 19 #define ASPEED_SDHCI_INFO_RESET 0x00030000 20 #define ASPEED_SDHCI_DEBOUNCE 0x04 21 #define ASPEED_SDHCI_DEBOUNCE_RESET 0x00000005 22 #define ASPEED_SDHCI_BUS 0x08 23 #define ASPEED_SDHCI_SDIO_140 0x10 24 #define ASPEED_SDHCI_SDIO_148 0x18 25 #define ASPEED_SDHCI_SDIO_240 0x20 26 #define ASPEED_SDHCI_SDIO_248 0x28 27 #define ASPEED_SDHCI_WP_POL 0xec 28 #define ASPEED_SDHCI_CARD_DET 0xf0 29 #define ASPEED_SDHCI_IRQ_STAT 0xfc 30 31 #define TO_REG(addr) ((addr) / sizeof(uint32_t)) 32 33 static uint64_t aspeed_sdhci_read(void *opaque, hwaddr addr, unsigned int size) 34 { 35 uint32_t val = 0; 36 AspeedSDHCIState *sdhci = opaque; 37 38 switch (addr) { 39 case ASPEED_SDHCI_SDIO_140: 40 val = (uint32_t)sdhci->slots[0].capareg; 41 break; 42 case ASPEED_SDHCI_SDIO_148: 43 val = (uint32_t)sdhci->slots[0].maxcurr; 44 break; 45 case ASPEED_SDHCI_SDIO_240: 46 val = (uint32_t)sdhci->slots[1].capareg; 47 break; 48 case ASPEED_SDHCI_SDIO_248: 49 val = (uint32_t)sdhci->slots[1].maxcurr; 50 break; 51 default: 52 if (addr < ASPEED_SDHCI_REG_SIZE) { 53 val = sdhci->regs[TO_REG(addr)]; 54 } else { 55 qemu_log_mask(LOG_GUEST_ERROR, 56 "%s: Out-of-bounds read at 0x%" HWADDR_PRIx "\n", 57 __func__, addr); 58 } 59 } 60 61 return (uint64_t)val; 62 } 63 64 static void aspeed_sdhci_write(void *opaque, hwaddr addr, uint64_t val, 65 unsigned int size) 66 { 67 AspeedSDHCIState *sdhci = opaque; 68 69 switch (addr) { 70 case ASPEED_SDHCI_SDIO_140: 71 sdhci->slots[0].capareg = (uint64_t)(uint32_t)val; 72 break; 73 case ASPEED_SDHCI_SDIO_148: 74 sdhci->slots[0].maxcurr = (uint64_t)(uint32_t)val; 75 break; 76 case ASPEED_SDHCI_SDIO_240: 77 sdhci->slots[1].capareg = (uint64_t)(uint32_t)val; 78 break; 79 case ASPEED_SDHCI_SDIO_248: 80 sdhci->slots[1].maxcurr = (uint64_t)(uint32_t)val; 81 break; 82 default: 83 if (addr < ASPEED_SDHCI_REG_SIZE) { 84 sdhci->regs[TO_REG(addr)] = (uint32_t)val; 85 } else { 86 qemu_log_mask(LOG_GUEST_ERROR, 87 "%s: Out-of-bounds write at 0x%" HWADDR_PRIx "\n", 88 __func__, addr); 89 } 90 } 91 } 92 93 static const MemoryRegionOps aspeed_sdhci_ops = { 94 .read = aspeed_sdhci_read, 95 .write = aspeed_sdhci_write, 96 .endianness = DEVICE_NATIVE_ENDIAN, 97 .valid.min_access_size = 4, 98 .valid.max_access_size = 4, 99 }; 100 101 static void aspeed_sdhci_set_irq(void *opaque, int n, int level) 102 { 103 AspeedSDHCIState *sdhci = opaque; 104 105 if (level) { 106 sdhci->regs[TO_REG(ASPEED_SDHCI_IRQ_STAT)] |= BIT(n); 107 108 qemu_irq_raise(sdhci->irq); 109 } else { 110 sdhci->regs[TO_REG(ASPEED_SDHCI_IRQ_STAT)] &= ~BIT(n); 111 112 qemu_irq_lower(sdhci->irq); 113 } 114 } 115 116 static void aspeed_sdhci_realize(DeviceState *dev, Error **errp) 117 { 118 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 119 AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev); 120 121 /* Create input irqs for the slots */ 122 qdev_init_gpio_in_named_with_opaque(DEVICE(sbd), aspeed_sdhci_set_irq, 123 sdhci, NULL, sdhci->num_slots); 124 125 sysbus_init_irq(sbd, &sdhci->irq); 126 memory_region_init_io(&sdhci->iomem, OBJECT(sdhci), &aspeed_sdhci_ops, 127 sdhci, TYPE_ASPEED_SDHCI, 0x1000); 128 sysbus_init_mmio(sbd, &sdhci->iomem); 129 130 for (int i = 0; i < sdhci->num_slots; ++i) { 131 Object *sdhci_slot = OBJECT(&sdhci->slots[i]); 132 SysBusDevice *sbd_slot = SYS_BUS_DEVICE(&sdhci->slots[i]); 133 134 if (!object_property_set_int(sdhci_slot, "sd-spec-version", 2, errp)) { 135 return; 136 } 137 138 if (!object_property_set_uint(sdhci_slot, "capareg", 139 ASPEED_SDHCI_CAPABILITIES, errp)) { 140 return; 141 } 142 143 if (!sysbus_realize(sbd_slot, errp)) { 144 return; 145 } 146 147 sysbus_connect_irq(sbd_slot, 0, qdev_get_gpio_in(DEVICE(sbd), i)); 148 memory_region_add_subregion(&sdhci->iomem, (i + 1) * 0x100, 149 &sdhci->slots[i].iomem); 150 } 151 } 152 153 static void aspeed_sdhci_reset(DeviceState *dev) 154 { 155 AspeedSDHCIState *sdhci = ASPEED_SDHCI(dev); 156 157 memset(sdhci->regs, 0, ASPEED_SDHCI_REG_SIZE); 158 sdhci->regs[TO_REG(ASPEED_SDHCI_INFO)] = ASPEED_SDHCI_INFO_RESET; 159 sdhci->regs[TO_REG(ASPEED_SDHCI_DEBOUNCE)] = ASPEED_SDHCI_DEBOUNCE_RESET; 160 } 161 162 static const VMStateDescription vmstate_aspeed_sdhci = { 163 .name = TYPE_ASPEED_SDHCI, 164 .version_id = 1, 165 .fields = (VMStateField[]) { 166 VMSTATE_UINT32_ARRAY(regs, AspeedSDHCIState, ASPEED_SDHCI_NUM_REGS), 167 VMSTATE_END_OF_LIST(), 168 }, 169 }; 170 171 static Property aspeed_sdhci_properties[] = { 172 DEFINE_PROP_UINT8("num-slots", AspeedSDHCIState, num_slots, 0), 173 DEFINE_PROP_END_OF_LIST(), 174 }; 175 176 static void aspeed_sdhci_class_init(ObjectClass *classp, void *data) 177 { 178 DeviceClass *dc = DEVICE_CLASS(classp); 179 180 dc->realize = aspeed_sdhci_realize; 181 dc->reset = aspeed_sdhci_reset; 182 dc->vmsd = &vmstate_aspeed_sdhci; 183 device_class_set_props(dc, aspeed_sdhci_properties); 184 } 185 186 static TypeInfo aspeed_sdhci_info = { 187 .name = TYPE_ASPEED_SDHCI, 188 .parent = TYPE_SYS_BUS_DEVICE, 189 .instance_size = sizeof(AspeedSDHCIState), 190 .class_init = aspeed_sdhci_class_init, 191 }; 192 193 static void aspeed_sdhci_register_types(void) 194 { 195 type_register_static(&aspeed_sdhci_info); 196 } 197 198 type_init(aspeed_sdhci_register_types) 199