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 /* Random Number Generator */ 90 object_initialize(&s->rng, sizeof(s->rng), TYPE_BCM2835_RNG); 91 object_property_add_child(obj, "rng", OBJECT(&s->rng), NULL); 92 qdev_set_parent_bus(DEVICE(&s->rng), sysbus_get_default()); 93 94 /* Extended Mass Media Controller */ 95 object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); 96 object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); 97 qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); 98 99 /* DMA Channels */ 100 object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA); 101 object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL); 102 qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default()); 103 104 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 105 OBJECT(&s->gpu_bus_mr), &error_abort); 106 } 107 108 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 109 { 110 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 111 Object *obj; 112 MemoryRegion *ram; 113 Error *err = NULL; 114 uint32_t ram_size, vcram_size; 115 int n; 116 117 obj = object_property_get_link(OBJECT(dev), "ram", &err); 118 if (obj == NULL) { 119 error_setg(errp, "%s: required ram link not found: %s", 120 __func__, error_get_pretty(err)); 121 return; 122 } 123 124 ram = MEMORY_REGION(obj); 125 ram_size = memory_region_size(ram); 126 127 /* Map peripherals and RAM into the GPU address space. */ 128 memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), 129 "bcm2835-peripherals", &s->peri_mr, 0, 130 memory_region_size(&s->peri_mr)); 131 132 memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, 133 &s->peri_mr_alias, 1); 134 135 /* RAM is aliased four times (different cache configurations) on the GPU */ 136 for (n = 0; n < 4; n++) { 137 memory_region_init_alias(&s->ram_alias[n], OBJECT(s), 138 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); 139 memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, 140 &s->ram_alias[n], 0); 141 } 142 143 /* Interrupt Controller */ 144 object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); 145 if (err) { 146 error_propagate(errp, err); 147 return; 148 } 149 150 memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, 151 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); 152 sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); 153 154 /* UART0 */ 155 qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]); 156 object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); 157 if (err) { 158 error_propagate(errp, err); 159 return; 160 } 161 162 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 163 sysbus_mmio_get_region(s->uart0, 0)); 164 sysbus_connect_irq(s->uart0, 0, 165 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 166 INTERRUPT_UART)); 167 /* AUX / UART1 */ 168 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]); 169 170 object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); 171 if (err) { 172 error_propagate(errp, err); 173 return; 174 } 175 176 memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, 177 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); 178 sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, 179 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 180 INTERRUPT_AUX)); 181 182 /* Mailboxes */ 183 object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); 184 if (err) { 185 error_propagate(errp, err); 186 return; 187 } 188 189 memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, 190 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); 191 sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, 192 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, 193 INTERRUPT_ARM_MAILBOX)); 194 195 /* Framebuffer */ 196 vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size", 197 &err); 198 if (err) { 199 error_propagate(errp, err); 200 return; 201 } 202 203 object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size, 204 "vcram-base", &err); 205 if (err) { 206 error_propagate(errp, err); 207 return; 208 } 209 210 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 211 if (err) { 212 error_propagate(errp, err); 213 return; 214 } 215 216 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 217 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 218 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 219 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 220 221 /* Property channel */ 222 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 223 if (err) { 224 error_propagate(errp, err); 225 return; 226 } 227 228 memory_region_add_subregion(&s->mbox_mr, 229 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 230 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 231 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 232 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 233 234 /* Random Number Generator */ 235 object_property_set_bool(OBJECT(&s->rng), true, "realized", &err); 236 if (err) { 237 error_propagate(errp, err); 238 return; 239 } 240 241 memory_region_add_subregion(&s->peri_mr, RNG_OFFSET, 242 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0)); 243 244 /* Extended Mass Media Controller */ 245 object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 246 &err); 247 if (err) { 248 error_propagate(errp, err); 249 return; 250 } 251 252 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 253 &err); 254 if (err) { 255 error_propagate(errp, err); 256 return; 257 } 258 259 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 260 if (err) { 261 error_propagate(errp, err); 262 return; 263 } 264 265 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 266 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 267 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 268 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 269 INTERRUPT_ARASANSDIO)); 270 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus", 271 &err); 272 if (err) { 273 error_propagate(errp, err); 274 return; 275 } 276 277 /* DMA Channels */ 278 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 279 if (err) { 280 error_propagate(errp, err); 281 return; 282 } 283 284 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 285 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 286 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 287 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 288 289 for (n = 0; n <= 12; n++) { 290 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 291 qdev_get_gpio_in_named(DEVICE(&s->ic), 292 BCM2835_IC_GPU_IRQ, 293 INTERRUPT_DMA0 + n)); 294 } 295 } 296 297 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 298 { 299 DeviceClass *dc = DEVICE_CLASS(oc); 300 301 dc->realize = bcm2835_peripherals_realize; 302 } 303 304 static const TypeInfo bcm2835_peripherals_type_info = { 305 .name = TYPE_BCM2835_PERIPHERALS, 306 .parent = TYPE_SYS_BUS_DEVICE, 307 .instance_size = sizeof(BCM2835PeripheralState), 308 .instance_init = bcm2835_peripherals_init, 309 .class_init = bcm2835_peripherals_class_init, 310 }; 311 312 static void bcm2835_peripherals_register_types(void) 313 { 314 type_register_static(&bcm2835_peripherals_type_info); 315 } 316 317 type_init(bcm2835_peripherals_register_types) 318