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 18 /* Peripheral base address on the VC (GPU) system bus */ 19 #define BCM2835_VC_PERI_BASE 0x7e000000 20 21 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ 22 #define BCM2835_SDHC_CAPAREG 0x52034b4 23 24 static void bcm2835_peripherals_init(Object *obj) 25 { 26 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); 27 28 /* Memory region for peripheral devices, which we export to our parent */ 29 memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); 30 object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); 31 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); 32 33 /* Internal memory region for peripheral bus addresses (not exported) */ 34 memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); 35 object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); 36 37 /* Internal memory region for request/response communication with 38 * mailbox-addressable peripherals (not exported) 39 */ 40 memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", 41 MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); 42 43 /* Interrupt Controller */ 44 object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC); 45 object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL); 46 qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default()); 47 48 /* UART0 */ 49 s->uart0 = SYS_BUS_DEVICE(object_new("pl011")); 50 object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL); 51 qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default()); 52 53 /* AUX / UART1 */ 54 object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX); 55 object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL); 56 qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default()); 57 58 /* Mailboxes */ 59 object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX); 60 object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL); 61 qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default()); 62 63 object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", 64 OBJECT(&s->mbox_mr), &error_abort); 65 66 /* Framebuffer */ 67 object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB); 68 object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL); 69 object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", 70 &error_abort); 71 qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default()); 72 73 object_property_add_const_link(OBJECT(&s->fb), "dma-mr", 74 OBJECT(&s->gpu_bus_mr), &error_abort); 75 76 /* Property channel */ 77 object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); 78 object_property_add_child(obj, "property", OBJECT(&s->property), NULL); 79 object_property_add_alias(obj, "board-rev", OBJECT(&s->property), 80 "board-rev", &error_abort); 81 qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default()); 82 83 object_property_add_const_link(OBJECT(&s->property), "fb", 84 OBJECT(&s->fb), &error_abort); 85 object_property_add_const_link(OBJECT(&s->property), "dma-mr", 86 OBJECT(&s->gpu_bus_mr), &error_abort); 87 88 /* Extended Mass Media Controller */ 89 object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); 90 object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); 91 qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); 92 93 /* DMA Channels */ 94 object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA); 95 object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL); 96 qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default()); 97 98 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 99 OBJECT(&s->gpu_bus_mr), &error_abort); 100 } 101 102 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 103 { 104 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 105 Object *obj; 106 MemoryRegion *ram; 107 Error *err = NULL; 108 uint32_t ram_size, vcram_size; 109 CharDriverState *chr; 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 object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); 151 if (err) { 152 error_propagate(errp, err); 153 return; 154 } 155 156 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 157 sysbus_mmio_get_region(s->uart0, 0)); 158 sysbus_connect_irq(s->uart0, 0, 159 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 160 INTERRUPT_UART)); 161 162 /* AUX / UART1 */ 163 /* TODO: don't call qemu_char_get_next_serial() here, instead set 164 * chardev properties for each uart at the board level, once pl011 165 * (uart0) has been updated to avoid qemu_char_get_next_serial() 166 */ 167 chr = qemu_char_get_next_serial(); 168 if (chr == NULL) { 169 chr = qemu_chr_new("bcm2835.uart1", "null", NULL); 170 } 171 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", chr); 172 173 object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); 174 if (err) { 175 error_propagate(errp, err); 176 return; 177 } 178 179 memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, 180 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); 181 sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, 182 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 183 INTERRUPT_AUX)); 184 185 /* Mailboxes */ 186 object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); 187 if (err) { 188 error_propagate(errp, err); 189 return; 190 } 191 192 memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, 193 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); 194 sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, 195 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, 196 INTERRUPT_ARM_MAILBOX)); 197 198 /* Framebuffer */ 199 vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size", 200 &err); 201 if (err) { 202 error_propagate(errp, err); 203 return; 204 } 205 206 object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size, 207 "vcram-base", &err); 208 if (err) { 209 error_propagate(errp, err); 210 return; 211 } 212 213 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 214 if (err) { 215 error_propagate(errp, err); 216 return; 217 } 218 219 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 220 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 221 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 222 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 223 224 /* Property channel */ 225 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 226 if (err) { 227 error_propagate(errp, err); 228 return; 229 } 230 231 memory_region_add_subregion(&s->mbox_mr, 232 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 233 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 234 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 235 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 236 237 /* Extended Mass Media Controller */ 238 object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 239 &err); 240 if (err) { 241 error_propagate(errp, err); 242 return; 243 } 244 245 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 246 &err); 247 if (err) { 248 error_propagate(errp, err); 249 return; 250 } 251 252 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 253 if (err) { 254 error_propagate(errp, err); 255 return; 256 } 257 258 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 259 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 260 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 261 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 262 INTERRUPT_ARASANSDIO)); 263 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus", 264 &err); 265 if (err) { 266 error_propagate(errp, err); 267 return; 268 } 269 270 /* DMA Channels */ 271 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 272 if (err) { 273 error_propagate(errp, err); 274 return; 275 } 276 277 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 278 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 279 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 280 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 281 282 for (n = 0; n <= 12; n++) { 283 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 284 qdev_get_gpio_in_named(DEVICE(&s->ic), 285 BCM2835_IC_GPU_IRQ, 286 INTERRUPT_DMA0 + n)); 287 } 288 } 289 290 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 291 { 292 DeviceClass *dc = DEVICE_CLASS(oc); 293 294 dc->realize = bcm2835_peripherals_realize; 295 /* Reason: realize() method uses qemu_char_get_next_serial() */ 296 dc->cannot_instantiate_with_device_add_yet = true; 297 } 298 299 static const TypeInfo bcm2835_peripherals_type_info = { 300 .name = TYPE_BCM2835_PERIPHERALS, 301 .parent = TYPE_SYS_BUS_DEVICE, 302 .instance_size = sizeof(BCM2835PeripheralState), 303 .instance_init = bcm2835_peripherals_init, 304 .class_init = bcm2835_peripherals_class_init, 305 }; 306 307 static void bcm2835_peripherals_register_types(void) 308 { 309 type_register_static(&bcm2835_peripherals_type_info); 310 } 311 312 type_init(bcm2835_peripherals_register_types) 313