/* * Nordic Semiconductor nRF51 non-volatile memory * * It provides an interface to erase regions in flash memory. * Furthermore it provides the user and factory information registers. * * Reference Manual: http://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.pdf * * See nRF51 reference manual and product sheet sections: * + Non-Volatile Memory Controller (NVMC) * + Factory Information Configuration Registers (FICR) * + User Information Configuration Registers (UICR) * * Copyright 2018 Steffen Görtz * * This code is licensed under the GPL version 2 or later. See * the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "qemu/log.h" #include "qemu/module.h" #include "hw/arm/nrf51.h" #include "hw/nvram/nrf51_nvm.h" #include "hw/qdev-properties.h" #include "migration/vmstate.h" /* * FICR Registers Assignments * CODEPAGESIZE 0x010 * CODESIZE 0x014 * CLENR0 0x028 * PPFC 0x02C * NUMRAMBLOCK 0x034 * SIZERAMBLOCKS 0x038 * SIZERAMBLOCK[0] 0x038 * SIZERAMBLOCK[1] 0x03C * SIZERAMBLOCK[2] 0x040 * SIZERAMBLOCK[3] 0x044 * CONFIGID 0x05C * DEVICEID[0] 0x060 * DEVICEID[1] 0x064 * ER[0] 0x080 * ER[1] 0x084 * ER[2] 0x088 * ER[3] 0x08C * IR[0] 0x090 * IR[1] 0x094 * IR[2] 0x098 * IR[3] 0x09C * DEVICEADDRTYPE 0x0A0 * DEVICEADDR[0] 0x0A4 * DEVICEADDR[1] 0x0A8 * OVERRIDEEN 0x0AC * NRF_1MBIT[0] 0x0B0 * NRF_1MBIT[1] 0x0B4 * NRF_1MBIT[2] 0x0B8 * NRF_1MBIT[3] 0x0BC * NRF_1MBIT[4] 0x0C0 * BLE_1MBIT[0] 0x0EC * BLE_1MBIT[1] 0x0F0 * BLE_1MBIT[2] 0x0F4 * BLE_1MBIT[3] 0x0F8 * BLE_1MBIT[4] 0x0FC */ static const uint32_t ficr_content[64] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000400, 0x00000100, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000002, 0x00002000, 0x00002000, 0x00002000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000003, 0x12345678, 0x9ABCDEF1, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; static uint64_t ficr_read(void *opaque, hwaddr offset, unsigned int size) { assert(offset < sizeof(ficr_content)); return ficr_content[offset / 4]; } static void ficr_write(void *opaque, hwaddr offset, uint64_t value, unsigned int size) { /* Intentionally do nothing */ } static const MemoryRegionOps ficr_ops = { .read = ficr_read, .write = ficr_write, .impl.min_access_size = 4, .impl.max_access_size = 4, .endianness = DEVICE_LITTLE_ENDIAN }; /* * UICR Registers Assignments * CLENR0 0x000 * RBPCONF 0x004 * XTALFREQ 0x008 * FWID 0x010 * BOOTLOADERADDR 0x014 * NRFFW[0] 0x014 * NRFFW[1] 0x018 * NRFFW[2] 0x01C * NRFFW[3] 0x020 * NRFFW[4] 0x024 * NRFFW[5] 0x028 * NRFFW[6] 0x02C * NRFFW[7] 0x030 * NRFFW[8] 0x034 * NRFFW[9] 0x038 * NRFFW[10] 0x03C * NRFFW[11] 0x040 * NRFFW[12] 0x044 * NRFFW[13] 0x048 * NRFFW[14] 0x04C * NRFHW[0] 0x050 * NRFHW[1] 0x054 * NRFHW[2] 0x058 * NRFHW[3] 0x05C * NRFHW[4] 0x060 * NRFHW[5] 0x064 * NRFHW[6] 0x068 * NRFHW[7] 0x06C * NRFHW[8] 0x070 * NRFHW[9] 0x074 * NRFHW[10] 0x078 * NRFHW[11] 0x07C * CUSTOMER[0] 0x080 * CUSTOMER[1] 0x084 * CUSTOMER[2] 0x088 * CUSTOMER[3] 0x08C * CUSTOMER[4] 0x090 * CUSTOMER[5] 0x094 * CUSTOMER[6] 0x098 * CUSTOMER[7] 0x09C * CUSTOMER[8] 0x0A0 * CUSTOMER[9] 0x0A4 * CUSTOMER[10] 0x0A8 * CUSTOMER[11] 0x0AC * CUSTOMER[12] 0x0B0 * CUSTOMER[13] 0x0B4 * CUSTOMER[14] 0x0B8 * CUSTOMER[15] 0x0BC * CUSTOMER[16] 0x0C0 * CUSTOMER[17] 0x0C4 * CUSTOMER[18] 0x0C8 * CUSTOMER[19] 0x0CC * CUSTOMER[20] 0x0D0 * CUSTOMER[21] 0x0D4 * CUSTOMER[22] 0x0D8 * CUSTOMER[23] 0x0DC * CUSTOMER[24] 0x0E0 * CUSTOMER[25] 0x0E4 * CUSTOMER[26] 0x0E8 * CUSTOMER[27] 0x0EC * CUSTOMER[28] 0x0F0 * CUSTOMER[29] 0x0F4 * CUSTOMER[30] 0x0F8 * CUSTOMER[31] 0x0FC */ static uint64_t uicr_read(void *opaque, hwaddr offset, unsigned int size) { NRF51NVMState *s = NRF51_NVM(opaque); assert(offset < sizeof(s->uicr_content)); return s->uicr_content[offset / 4]; } static void uicr_write(void *opaque, hwaddr offset, uint64_t value, unsigned int size) { NRF51NVMState *s = NRF51_NVM(opaque); assert(offset < sizeof(s->uicr_content)); s->uicr_content[offset / 4] = value; } static const MemoryRegionOps uicr_ops = { .read = uicr_read, .write = uicr_write, .impl.min_access_size = 4, .impl.max_access_size = 4, .endianness = DEVICE_LITTLE_ENDIAN }; static uint64_t io_read(void *opaque, hwaddr offset, unsigned int size) { NRF51NVMState *s = NRF51_NVM(opaque); uint64_t r = 0; switch (offset) { case NRF51_NVMC_READY: r = NRF51_NVMC_READY_READY; break; case NRF51_NVMC_CONFIG: r = s->config; break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s: bad read offset 0x%" HWADDR_PRIx "\n", __func__, offset); break; } return r; } static void io_write(void *opaque, hwaddr offset, uint64_t value, unsigned int size) { NRF51NVMState *s = NRF51_NVM(opaque); switch (offset) { case NRF51_NVMC_CONFIG: s->config = value & NRF51_NVMC_CONFIG_MASK; break; case NRF51_NVMC_ERASEPCR0: case NRF51_NVMC_ERASEPCR1: if (s->config & NRF51_NVMC_CONFIG_EEN) { /* Mask in-page sub address */ value &= ~(NRF51_PAGE_SIZE - 1); if (value <= (s->flash_size - NRF51_PAGE_SIZE)) { memset(s->storage + value, 0xFF, NRF51_PAGE_SIZE); memory_region_flush_rom_device(&s->flash, value, NRF51_PAGE_SIZE); } } else { qemu_log_mask(LOG_GUEST_ERROR, "%s: Flash erase at 0x%" HWADDR_PRIx" while flash not erasable.\n", __func__, offset); } break; case NRF51_NVMC_ERASEALL: if (value == NRF51_NVMC_ERASE) { if (s->config & NRF51_NVMC_CONFIG_EEN) { memset(s->storage, 0xFF, s->flash_size); memory_region_flush_rom_device(&s->flash, 0, s->flash_size); memset(s->uicr_content, 0xFF, sizeof(s->uicr_content)); } else { qemu_log_mask(LOG_GUEST_ERROR, "%s: Flash not erasable.\n", __func__); } } break; case NRF51_NVMC_ERASEUICR: if (value == NRF51_NVMC_ERASE) { memset(s->uicr_content, 0xFF, sizeof(s->uicr_content)); } break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s: bad write offset 0x%" HWADDR_PRIx "\n", __func__, offset); } } static const MemoryRegionOps io_ops = { .read = io_read, .write = io_write, .impl.min_access_size = 4, .impl.max_access_size = 4, .endianness = DEVICE_LITTLE_ENDIAN, }; static uint64_t flash_read(void *opaque, hwaddr offset, unsigned size) { /* * This is a rom_device MemoryRegion which is always in * romd_mode (we never put it in MMIO mode), so reads always * go directly to RAM and never come here. */ g_assert_not_reached(); } static void flash_write(void *opaque, hwaddr offset, uint64_t value, unsigned int size) { NRF51NVMState *s = NRF51_NVM(opaque); if (s->config & NRF51_NVMC_CONFIG_WEN) { uint32_t oldval; assert(offset + size <= s->flash_size); /* NOR Flash only allows bits to be flipped from 1's to 0's on write */ oldval = ldl_le_p(s->storage + offset); oldval &= value; stl_le_p(s->storage + offset, oldval); memory_region_flush_rom_device(&s->flash, offset, size); } else { qemu_log_mask(LOG_GUEST_ERROR, "%s: Flash write 0x%" HWADDR_PRIx" while flash not writable.\n", __func__, offset); } } static const MemoryRegionOps flash_ops = { .read = flash_read, .write = flash_write, .valid.min_access_size = 4, .valid.max_access_size = 4, .endianness = DEVICE_LITTLE_ENDIAN, }; static void nrf51_nvm_init(Object *obj) { NRF51NVMState *s = NRF51_NVM(obj); SysBusDevice *sbd = SYS_BUS_DEVICE(obj); memory_region_init_io(&s->mmio, obj, &io_ops, s, "nrf51_soc.nvmc", NRF51_NVMC_SIZE); sysbus_init_mmio(sbd, &s->mmio); memory_region_init_io(&s->ficr, obj, &ficr_ops, s, "nrf51_soc.ficr", sizeof(ficr_content)); sysbus_init_mmio(sbd, &s->ficr); memory_region_init_io(&s->uicr, obj, &uicr_ops, s, "nrf51_soc.uicr", sizeof(s->uicr_content)); sysbus_init_mmio(sbd, &s->uicr); } static void nrf51_nvm_realize(DeviceState *dev, Error **errp) { NRF51NVMState *s = NRF51_NVM(dev); if (!memory_region_init_rom_device(&s->flash, OBJECT(dev), &flash_ops, s, "nrf51_soc.flash", s->flash_size, errp)) { return; } s->storage = memory_region_get_ram_ptr(&s->flash); sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->flash); } static void nrf51_nvm_reset(DeviceState *dev) { NRF51NVMState *s = NRF51_NVM(dev); s->config = 0x00; memset(s->uicr_content, 0xFF, sizeof(s->uicr_content)); } static Property nrf51_nvm_properties[] = { DEFINE_PROP_UINT32("flash-size", NRF51NVMState, flash_size, 0x40000), DEFINE_PROP_END_OF_LIST(), }; static const VMStateDescription vmstate_nvm = { .name = "nrf51_soc.nvm", .version_id = 1, .minimum_version_id = 1, .fields = (const VMStateField[]) { VMSTATE_UINT32_ARRAY(uicr_content, NRF51NVMState, NRF51_UICR_FIXTURE_SIZE), VMSTATE_UINT32(config, NRF51NVMState), VMSTATE_END_OF_LIST() } }; static void nrf51_nvm_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_props(dc, nrf51_nvm_properties); dc->vmsd = &vmstate_nvm; dc->realize = nrf51_nvm_realize; device_class_set_legacy_reset(dc, nrf51_nvm_reset); } static const TypeInfo nrf51_nvm_info = { .name = TYPE_NRF51_NVM, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(NRF51NVMState), .instance_init = nrf51_nvm_init, .class_init = nrf51_nvm_class_init }; static void nrf51_nvm_register_types(void) { type_register_static(&nrf51_nvm_info); } type_init(nrf51_nvm_register_types)