/* * Raspberry Pi emulation (c) 2012 Gregory Estrade * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/misc/bcm2835_property.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" #include "hw/irq.h" #include "hw/misc/bcm2835_mbox_defs.h" #include "hw/arm/raspberrypi-fw-defs.h" #include "sysemu/dma.h" #include "qemu/log.h" #include "qemu/module.h" #include "trace.h" #include "hw/arm/raspi_platform.h" /* https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface */ static void bcm2835_property_mbox_push(BCM2835PropertyState *s, uint32_t value) { uint32_t tag; uint32_t bufsize; uint32_t tot_len; size_t resplen; uint32_t tmp; int n; uint32_t offset, length, color; /* * Copy the current state of the framebuffer config; we will update * this copy as we process tags and then ask the framebuffer to use * it at the end. */ BCM2835FBConfig fbconfig = s->fbdev->config; bool fbconfig_updated = false; value &= ~0xf; s->addr = value; tot_len = ldl_le_phys(&s->dma_as, value); /* @(addr + 4) : Buffer response code */ value = s->addr + 8; while (value + 8 <= s->addr + tot_len) { tag = ldl_le_phys(&s->dma_as, value); bufsize = ldl_le_phys(&s->dma_as, value + 4); /* @(value + 8) : Request/response indicator */ resplen = 0; switch (tag) { case RPI_FWREQ_PROPERTY_END: break; case RPI_FWREQ_GET_FIRMWARE_REVISION: stl_le_phys(&s->dma_as, value + 12, 346337); resplen = 4; break; case RPI_FWREQ_GET_BOARD_MODEL: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x get board model NYI\n", tag); resplen = 4; break; case RPI_FWREQ_GET_BOARD_REVISION: stl_le_phys(&s->dma_as, value + 12, s->board_rev); resplen = 4; break; case RPI_FWREQ_GET_BOARD_MAC_ADDRESS: resplen = sizeof(s->macaddr.a); dma_memory_write(&s->dma_as, value + 12, s->macaddr.a, resplen, MEMTXATTRS_UNSPECIFIED); break; case RPI_FWREQ_GET_BOARD_SERIAL: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x get board serial NYI\n", tag); resplen = 8; break; case RPI_FWREQ_GET_ARM_MEMORY: /* base */ stl_le_phys(&s->dma_as, value + 12, 0); /* size */ stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_base); resplen = 8; break; case RPI_FWREQ_GET_VC_MEMORY: /* base */ stl_le_phys(&s->dma_as, value + 12, s->fbdev->vcram_base); /* size */ stl_le_phys(&s->dma_as, value + 16, s->fbdev->vcram_size); resplen = 8; break; case RPI_FWREQ_SET_POWER_STATE: /* Assume that whatever device they asked for exists, * and we'll just claim we set it to the desired state */ tmp = ldl_le_phys(&s->dma_as, value + 16); stl_le_phys(&s->dma_as, value + 16, (tmp & 1)); resplen = 8; break; /* Clocks */ case RPI_FWREQ_GET_CLOCK_STATE: stl_le_phys(&s->dma_as, value + 16, 0x1); resplen = 8; break; case RPI_FWREQ_SET_CLOCK_STATE: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x set clock state NYI\n", tag); resplen = 8; break; case RPI_FWREQ_GET_CLOCK_RATE: case RPI_FWREQ_GET_MAX_CLOCK_RATE: case RPI_FWREQ_GET_MIN_CLOCK_RATE: switch (ldl_le_phys(&s->dma_as, value + 12)) { case RPI_FIRMWARE_EMMC_CLK_ID: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_EMMC_CLK_RATE); break; case RPI_FIRMWARE_UART_CLK_ID: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_UART_CLK_RATE); break; case RPI_FIRMWARE_CORE_CLK_ID: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_CORE_CLK_RATE); break; default: stl_le_phys(&s->dma_as, value + 16, RPI_FIRMWARE_DEFAULT_CLK_RATE); break; } resplen = 8; break; case RPI_FWREQ_SET_CLOCK_RATE: case RPI_FWREQ_SET_MAX_CLOCK_RATE: case RPI_FWREQ_SET_MIN_CLOCK_RATE: qemu_log_mask(LOG_UNIMP, "bcm2835_property: 0x%08x set clock rate NYI\n", tag); resplen = 8; break; /* Temperature */ case RPI_FWREQ_GET_TEMPERATURE: stl_le_phys(&s->dma_as, value + 16, 25000); resplen = 8; break; case RPI_FWREQ_GET_MAX_TEMPERATURE: stl_le_phys(&s->dma_as, value + 16, 99000); resplen = 8; break; /* Frame buffer */ case RPI_FWREQ_FRAMEBUFFER_ALLOCATE: stl_le_phys(&s->dma_as, value + 12, fbconfig.base); stl_le_phys(&s->dma_as, value + 16, bcm2835_fb_get_size(&fbconfig)); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_RELEASE: resplen = 0; break; case RPI_FWREQ_FRAMEBUFFER_BLANK: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_PHYSICAL_WIDTH_HEIGHT: case RPI_FWREQ_FRAMEBUFFER_TEST_VIRTUAL_WIDTH_HEIGHT: resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_SET_PHYSICAL_WIDTH_HEIGHT: fbconfig.xres = ldl_le_phys(&s->dma_as, value + 12); fbconfig.yres = ldl_le_phys(&s->dma_as, value + 16); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; /* fall through */ case RPI_FWREQ_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT: stl_le_phys(&s->dma_as, value + 12, fbconfig.xres); stl_le_phys(&s->dma_as, value + 16, fbconfig.yres); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_SET_VIRTUAL_WIDTH_HEIGHT: fbconfig.xres_virtual = ldl_le_phys(&s->dma_as, value + 12); fbconfig.yres_virtual = ldl_le_phys(&s->dma_as, value + 16); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; /* fall through */ case RPI_FWREQ_FRAMEBUFFER_GET_VIRTUAL_WIDTH_HEIGHT: stl_le_phys(&s->dma_as, value + 12, fbconfig.xres_virtual); stl_le_phys(&s->dma_as, value + 16, fbconfig.yres_virtual); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_TEST_DEPTH: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_SET_DEPTH: fbconfig.bpp = ldl_le_phys(&s->dma_as, value + 12); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; /* fall through */ case RPI_FWREQ_FRAMEBUFFER_GET_DEPTH: stl_le_phys(&s->dma_as, value + 12, fbconfig.bpp); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_PIXEL_ORDER: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_SET_PIXEL_ORDER: fbconfig.pixo = ldl_le_phys(&s->dma_as, value + 12); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; /* fall through */ case RPI_FWREQ_FRAMEBUFFER_GET_PIXEL_ORDER: stl_le_phys(&s->dma_as, value + 12, fbconfig.pixo); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_ALPHA_MODE: resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_SET_ALPHA_MODE: fbconfig.alpha = ldl_le_phys(&s->dma_as, value + 12); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; /* fall through */ case RPI_FWREQ_FRAMEBUFFER_GET_ALPHA_MODE: stl_le_phys(&s->dma_as, value + 12, fbconfig.alpha); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_GET_PITCH: stl_le_phys(&s->dma_as, value + 12, bcm2835_fb_get_pitch(&fbconfig)); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_TEST_VIRTUAL_OFFSET: resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_SET_VIRTUAL_OFFSET: fbconfig.xoffset = ldl_le_phys(&s->dma_as, value + 12); fbconfig.yoffset = ldl_le_phys(&s->dma_as, value + 16); bcm2835_fb_validate_config(&fbconfig); fbconfig_updated = true; /* fall through */ case RPI_FWREQ_FRAMEBUFFER_GET_VIRTUAL_OFFSET: stl_le_phys(&s->dma_as, value + 12, fbconfig.xoffset); stl_le_phys(&s->dma_as, value + 16, fbconfig.yoffset); resplen = 8; break; case RPI_FWREQ_FRAMEBUFFER_GET_OVERSCAN: case RPI_FWREQ_FRAMEBUFFER_TEST_OVERSCAN: case RPI_FWREQ_FRAMEBUFFER_SET_OVERSCAN: stl_le_phys(&s->dma_as, value + 12, 0); stl_le_phys(&s->dma_as, value + 16, 0); stl_le_phys(&s->dma_as, value + 20, 0); stl_le_phys(&s->dma_as, value + 24, 0); resplen = 16; break; case RPI_FWREQ_FRAMEBUFFER_SET_PALETTE: offset = ldl_le_phys(&s->dma_as, value + 12); length = ldl_le_phys(&s->dma_as, value + 16); n = 0; while (n < length - offset) { color = ldl_le_phys(&s->dma_as, value + 20 + (n << 2)); stl_le_phys(&s->dma_as, s->fbdev->vcram_base + ((offset + n) << 2), color); n++; } stl_le_phys(&s->dma_as, value + 12, 0); resplen = 4; break; case RPI_FWREQ_FRAMEBUFFER_GET_NUM_DISPLAYS: stl_le_phys(&s->dma_as, value + 12, 1); resplen = 4; break; case RPI_FWREQ_GET_DMA_CHANNELS: /* channels 2-5 */ stl_le_phys(&s->dma_as, value + 12, 0x003C); resplen = 4; break; case RPI_FWREQ_GET_COMMAND_LINE: /* * We follow the firmware behaviour: no NUL terminator is * written to the buffer, and if the buffer is too short * we report the required length in the response header * and copy nothing to the buffer. */ resplen = strlen(s->command_line); if (bufsize >= resplen) address_space_write(&s->dma_as, value + 12, MEMTXATTRS_UNSPECIFIED, s->command_line, resplen); break; default: qemu_log_mask(LOG_UNIMP, "bcm2835_property: unhandled tag 0x%08x\n", tag); break; } trace_bcm2835_mbox_property(tag, bufsize, resplen); if (tag == 0) { break; } stl_le_phys(&s->dma_as, value + 8, (1 << 31) | resplen); value += bufsize + 12; } /* Reconfigure framebuffer if required */ if (fbconfig_updated) { bcm2835_fb_reconfigure(s->fbdev, &fbconfig); } /* Buffer response code */ stl_le_phys(&s->dma_as, s->addr + 4, (1 << 31)); } static uint64_t bcm2835_property_read(void *opaque, hwaddr offset, unsigned size) { BCM2835PropertyState *s = opaque; uint32_t res = 0; switch (offset) { case MBOX_AS_DATA: res = MBOX_CHAN_PROPERTY | s->addr; s->pending = false; qemu_set_irq(s->mbox_irq, 0); break; case MBOX_AS_PENDING: res = s->pending; break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", __func__, offset); return 0; } return res; } static void bcm2835_property_write(void *opaque, hwaddr offset, uint64_t value, unsigned size) { BCM2835PropertyState *s = opaque; switch (offset) { case MBOX_AS_DATA: /* bcm2835_mbox should check our pending status before pushing */ assert(!s->pending); s->pending = true; bcm2835_property_mbox_push(s, value); qemu_set_irq(s->mbox_irq, 1); break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n", __func__, offset); return; } } static const MemoryRegionOps bcm2835_property_ops = { .read = bcm2835_property_read, .write = bcm2835_property_write, .endianness = DEVICE_NATIVE_ENDIAN, .valid.min_access_size = 4, .valid.max_access_size = 4, }; static const VMStateDescription vmstate_bcm2835_property = { .name = TYPE_BCM2835_PROPERTY, .version_id = 1, .minimum_version_id = 1, .fields = (const VMStateField[]) { VMSTATE_MACADDR(macaddr, BCM2835PropertyState), VMSTATE_UINT32(addr, BCM2835PropertyState), VMSTATE_BOOL(pending, BCM2835PropertyState), VMSTATE_END_OF_LIST() } }; static void bcm2835_property_init(Object *obj) { BCM2835PropertyState *s = BCM2835_PROPERTY(obj); memory_region_init_io(&s->iomem, OBJECT(s), &bcm2835_property_ops, s, TYPE_BCM2835_PROPERTY, 0x10); /* * bcm2835_property_ops call into bcm2835_mbox, which in-turn reads from * iomem. As such, mark iomem as re-entracy safe. */ s->iomem.disable_reentrancy_guard = true; sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); sysbus_init_irq(SYS_BUS_DEVICE(s), &s->mbox_irq); } static void bcm2835_property_reset(DeviceState *dev) { BCM2835PropertyState *s = BCM2835_PROPERTY(dev); s->pending = false; } static void bcm2835_property_realize(DeviceState *dev, Error **errp) { BCM2835PropertyState *s = BCM2835_PROPERTY(dev); Object *obj; obj = object_property_get_link(OBJECT(dev), "fb", &error_abort); s->fbdev = BCM2835_FB(obj); obj = object_property_get_link(OBJECT(dev), "dma-mr", &error_abort); s->dma_mr = MEMORY_REGION(obj); address_space_init(&s->dma_as, s->dma_mr, TYPE_BCM2835_PROPERTY "-memory"); /* TODO: connect to MAC address of USB NIC device, once we emulate it */ qemu_macaddr_default_if_unset(&s->macaddr); bcm2835_property_reset(dev); } static Property bcm2835_property_props[] = { DEFINE_PROP_UINT32("board-rev", BCM2835PropertyState, board_rev, 0), DEFINE_PROP_STRING("command-line", BCM2835PropertyState, command_line), DEFINE_PROP_END_OF_LIST() }; static void bcm2835_property_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_props(dc, bcm2835_property_props); dc->realize = bcm2835_property_realize; dc->vmsd = &vmstate_bcm2835_property; } static const TypeInfo bcm2835_property_info = { .name = TYPE_BCM2835_PROPERTY, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(BCM2835PropertyState), .class_init = bcm2835_property_class_init, .instance_init = bcm2835_property_init, }; static void bcm2835_property_register_types(void) { type_register_static(&bcm2835_property_info); } type_init(bcm2835_property_register_types)