1 /* 2 * Raspberry Pi emulation (c) 2012 Gregory Estrade 3 * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous 4 * 5 * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft 6 * Written by Andrew Baumann 7 * 8 * This code is licensed under the GNU GPLv2 and later. 9 */ 10 11 #include "qemu/osdep.h" 12 #include "qapi/error.h" 13 #include "hw/arm/bcm2835_peripherals.h" 14 #include "hw/misc/bcm2835_mbox_defs.h" 15 #include "hw/arm/raspi_platform.h" 16 #include "sysemu/char.h" 17 #include "sysemu/sysemu.h" 18 19 /* Peripheral base address on the VC (GPU) system bus */ 20 #define BCM2835_VC_PERI_BASE 0x7e000000 21 22 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ 23 #define BCM2835_SDHC_CAPAREG 0x52034b4 24 25 static void bcm2835_peripherals_init(Object *obj) 26 { 27 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); 28 29 /* Memory region for peripheral devices, which we export to our parent */ 30 memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); 31 object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); 32 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); 33 34 /* Internal memory region for peripheral bus addresses (not exported) */ 35 memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); 36 object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); 37 38 /* Internal memory region for request/response communication with 39 * mailbox-addressable peripherals (not exported) 40 */ 41 memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", 42 MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); 43 44 /* Interrupt Controller */ 45 object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC); 46 object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL); 47 qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default()); 48 49 /* UART0 */ 50 s->uart0 = SYS_BUS_DEVICE(object_new("pl011")); 51 object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL); 52 qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default()); 53 54 /* AUX / UART1 */ 55 object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX); 56 object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL); 57 qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default()); 58 59 /* Mailboxes */ 60 object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX); 61 object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL); 62 qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default()); 63 64 object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", 65 OBJECT(&s->mbox_mr), &error_abort); 66 67 /* Framebuffer */ 68 object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB); 69 object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL); 70 object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", 71 &error_abort); 72 qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default()); 73 74 object_property_add_const_link(OBJECT(&s->fb), "dma-mr", 75 OBJECT(&s->gpu_bus_mr), &error_abort); 76 77 /* Property channel */ 78 object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); 79 object_property_add_child(obj, "property", OBJECT(&s->property), NULL); 80 object_property_add_alias(obj, "board-rev", OBJECT(&s->property), 81 "board-rev", &error_abort); 82 qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default()); 83 84 object_property_add_const_link(OBJECT(&s->property), "fb", 85 OBJECT(&s->fb), &error_abort); 86 object_property_add_const_link(OBJECT(&s->property), "dma-mr", 87 OBJECT(&s->gpu_bus_mr), &error_abort); 88 89 /* Extended Mass Media Controller */ 90 object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); 91 object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); 92 qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); 93 94 /* DMA Channels */ 95 object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA); 96 object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL); 97 qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default()); 98 99 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 100 OBJECT(&s->gpu_bus_mr), &error_abort); 101 } 102 103 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 104 { 105 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 106 Object *obj; 107 MemoryRegion *ram; 108 Error *err = NULL; 109 uint32_t ram_size, vcram_size; 110 int n; 111 112 obj = object_property_get_link(OBJECT(dev), "ram", &err); 113 if (obj == NULL) { 114 error_setg(errp, "%s: required ram link not found: %s", 115 __func__, error_get_pretty(err)); 116 return; 117 } 118 119 ram = MEMORY_REGION(obj); 120 ram_size = memory_region_size(ram); 121 122 /* Map peripherals and RAM into the GPU address space. */ 123 memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), 124 "bcm2835-peripherals", &s->peri_mr, 0, 125 memory_region_size(&s->peri_mr)); 126 127 memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, 128 &s->peri_mr_alias, 1); 129 130 /* RAM is aliased four times (different cache configurations) on the GPU */ 131 for (n = 0; n < 4; n++) { 132 memory_region_init_alias(&s->ram_alias[n], OBJECT(s), 133 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); 134 memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, 135 &s->ram_alias[n], 0); 136 } 137 138 /* Interrupt Controller */ 139 object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); 140 if (err) { 141 error_propagate(errp, err); 142 return; 143 } 144 145 memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, 146 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); 147 sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); 148 149 /* UART0 */ 150 qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]); 151 object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); 152 if (err) { 153 error_propagate(errp, err); 154 return; 155 } 156 157 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 158 sysbus_mmio_get_region(s->uart0, 0)); 159 sysbus_connect_irq(s->uart0, 0, 160 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 161 INTERRUPT_UART)); 162 /* AUX / UART1 */ 163 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]); 164 165 object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); 166 if (err) { 167 error_propagate(errp, err); 168 return; 169 } 170 171 memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, 172 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); 173 sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, 174 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 175 INTERRUPT_AUX)); 176 177 /* Mailboxes */ 178 object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); 179 if (err) { 180 error_propagate(errp, err); 181 return; 182 } 183 184 memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, 185 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); 186 sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, 187 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, 188 INTERRUPT_ARM_MAILBOX)); 189 190 /* Framebuffer */ 191 vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size", 192 &err); 193 if (err) { 194 error_propagate(errp, err); 195 return; 196 } 197 198 object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size, 199 "vcram-base", &err); 200 if (err) { 201 error_propagate(errp, err); 202 return; 203 } 204 205 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 206 if (err) { 207 error_propagate(errp, err); 208 return; 209 } 210 211 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 212 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 213 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 214 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 215 216 /* Property channel */ 217 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 218 if (err) { 219 error_propagate(errp, err); 220 return; 221 } 222 223 memory_region_add_subregion(&s->mbox_mr, 224 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 225 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 226 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 227 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 228 229 /* Extended Mass Media Controller */ 230 object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 231 &err); 232 if (err) { 233 error_propagate(errp, err); 234 return; 235 } 236 237 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 238 &err); 239 if (err) { 240 error_propagate(errp, err); 241 return; 242 } 243 244 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 245 if (err) { 246 error_propagate(errp, err); 247 return; 248 } 249 250 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 251 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 252 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 253 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 254 INTERRUPT_ARASANSDIO)); 255 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus", 256 &err); 257 if (err) { 258 error_propagate(errp, err); 259 return; 260 } 261 262 /* DMA Channels */ 263 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 264 if (err) { 265 error_propagate(errp, err); 266 return; 267 } 268 269 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 270 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 271 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 272 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 273 274 for (n = 0; n <= 12; n++) { 275 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 276 qdev_get_gpio_in_named(DEVICE(&s->ic), 277 BCM2835_IC_GPU_IRQ, 278 INTERRUPT_DMA0 + n)); 279 } 280 } 281 282 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 283 { 284 DeviceClass *dc = DEVICE_CLASS(oc); 285 286 dc->realize = bcm2835_peripherals_realize; 287 } 288 289 static const TypeInfo bcm2835_peripherals_type_info = { 290 .name = TYPE_BCM2835_PERIPHERALS, 291 .parent = TYPE_SYS_BUS_DEVICE, 292 .instance_size = sizeof(BCM2835PeripheralState), 293 .instance_init = bcm2835_peripherals_init, 294 .class_init = bcm2835_peripherals_class_init, 295 }; 296 297 static void bcm2835_peripherals_register_types(void) 298 { 299 type_register_static(&bcm2835_peripherals_type_info); 300 } 301 302 type_init(bcm2835_peripherals_register_types) 303