diff options
Diffstat (limited to 'hw/misc/npcm_gcr.c')
| -rw-r--r-- | hw/misc/npcm_gcr.c | 482 |
1 files changed, 482 insertions, 0 deletions
diff --git a/hw/misc/npcm_gcr.c b/hw/misc/npcm_gcr.c new file mode 100644 index 0000000..2acaa16 --- /dev/null +++ b/hw/misc/npcm_gcr.c @@ -0,0 +1,482 @@ +/* + * Nuvoton NPCM7xx/8xx System Global Control Registers. + * + * Copyright 2020 Google LLC + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include "qemu/osdep.h" + +#include "hw/misc/npcm_gcr.h" +#include "hw/qdev-properties.h" +#include "migration/vmstate.h" +#include "qapi/error.h" +#include "qemu/cutils.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "qemu/units.h" + +#include "trace.h" + +#define NPCM7XX_GCR_MIN_DRAM_SIZE (128 * MiB) +#define NPCM7XX_GCR_MAX_DRAM_SIZE (2 * GiB) + +enum NPCM7xxGCRRegisters { + NPCM7XX_GCR_PDID, + NPCM7XX_GCR_PWRON, + NPCM7XX_GCR_MFSEL1 = 0x0c / sizeof(uint32_t), + NPCM7XX_GCR_MFSEL2, + NPCM7XX_GCR_MISCPE, + NPCM7XX_GCR_SPSWC = 0x038 / sizeof(uint32_t), + NPCM7XX_GCR_INTCR, + NPCM7XX_GCR_INTSR, + NPCM7XX_GCR_HIFCR = 0x050 / sizeof(uint32_t), + NPCM7XX_GCR_INTCR2 = 0x060 / sizeof(uint32_t), + NPCM7XX_GCR_MFSEL3, + NPCM7XX_GCR_SRCNT, + NPCM7XX_GCR_RESSR, + NPCM7XX_GCR_RLOCKR1, + NPCM7XX_GCR_FLOCKR1, + NPCM7XX_GCR_DSCNT, + NPCM7XX_GCR_MDLR, + NPCM7XX_GCR_SCRPAD3, + NPCM7XX_GCR_SCRPAD2, + NPCM7XX_GCR_DAVCLVLR = 0x098 / sizeof(uint32_t), + NPCM7XX_GCR_INTCR3, + NPCM7XX_GCR_VSINTR = 0x0ac / sizeof(uint32_t), + NPCM7XX_GCR_MFSEL4, + NPCM7XX_GCR_CPBPNTR = 0x0c4 / sizeof(uint32_t), + NPCM7XX_GCR_CPCTL = 0x0d0 / sizeof(uint32_t), + NPCM7XX_GCR_CP2BST, + NPCM7XX_GCR_B2CPNT, + NPCM7XX_GCR_CPPCTL, + NPCM7XX_GCR_I2CSEGSEL, + NPCM7XX_GCR_I2CSEGCTL, + NPCM7XX_GCR_VSRCR, + NPCM7XX_GCR_MLOCKR, + NPCM7XX_GCR_SCRPAD = 0x013c / sizeof(uint32_t), + NPCM7XX_GCR_USB1PHYCTL, + NPCM7XX_GCR_USB2PHYCTL, +}; + +static const uint32_t npcm7xx_cold_reset_values[NPCM7XX_GCR_NR_REGS] = { + [NPCM7XX_GCR_PDID] = 0x04a92750, /* Poleg A1 */ + [NPCM7XX_GCR_MISCPE] = 0x0000ffff, + [NPCM7XX_GCR_SPSWC] = 0x00000003, + [NPCM7XX_GCR_INTCR] = 0x0000035e, + [NPCM7XX_GCR_HIFCR] = 0x0000004e, + [NPCM7XX_GCR_INTCR2] = (1U << 19), /* DDR initialized */ + [NPCM7XX_GCR_RESSR] = 0x80000000, + [NPCM7XX_GCR_DSCNT] = 0x000000c0, + [NPCM7XX_GCR_DAVCLVLR] = 0x5a00f3cf, + [NPCM7XX_GCR_SCRPAD] = 0x00000008, + [NPCM7XX_GCR_USB1PHYCTL] = 0x034730e4, + [NPCM7XX_GCR_USB2PHYCTL] = 0x034730e4, +}; + +enum NPCM8xxGCRRegisters { + NPCM8XX_GCR_PDID, + NPCM8XX_GCR_PWRON, + NPCM8XX_GCR_MISCPE = 0x014 / sizeof(uint32_t), + NPCM8XX_GCR_FLOCKR2 = 0x020 / sizeof(uint32_t), + NPCM8XX_GCR_FLOCKR3, + NPCM8XX_GCR_A35_MODE = 0x034 / sizeof(uint32_t), + NPCM8XX_GCR_SPSWC, + NPCM8XX_GCR_INTCR, + NPCM8XX_GCR_INTSR, + NPCM8XX_GCR_HIFCR = 0x050 / sizeof(uint32_t), + NPCM8XX_GCR_INTCR2 = 0x060 / sizeof(uint32_t), + NPCM8XX_GCR_SRCNT = 0x068 / sizeof(uint32_t), + NPCM8XX_GCR_RESSR, + NPCM8XX_GCR_RLOCKR1, + NPCM8XX_GCR_FLOCKR1, + NPCM8XX_GCR_DSCNT, + NPCM8XX_GCR_MDLR, + NPCM8XX_GCR_SCRPAD_C = 0x080 / sizeof(uint32_t), + NPCM8XX_GCR_SCRPAD_B, + NPCM8XX_GCR_DAVCLVLR = 0x098 / sizeof(uint32_t), + NPCM8XX_GCR_INTCR3, + NPCM8XX_GCR_PCIRCTL = 0x0a0 / sizeof(uint32_t), + NPCM8XX_GCR_VSINTR, + NPCM8XX_GCR_SD2SUR1 = 0x0b4 / sizeof(uint32_t), + NPCM8XX_GCR_SD2SUR2, + NPCM8XX_GCR_INTCR4 = 0x0c0 / sizeof(uint32_t), + NPCM8XX_GCR_CPCTL = 0x0d0 / sizeof(uint32_t), + NPCM8XX_GCR_CP2BST, + NPCM8XX_GCR_B2CPNT, + NPCM8XX_GCR_CPPCTL, + NPCM8XX_GCR_I2CSEGSEL = 0x0e0 / sizeof(uint32_t), + NPCM8XX_GCR_I2CSEGCTL, + NPCM8XX_GCR_VSRCR, + NPCM8XX_GCR_MLOCKR, + NPCM8XX_GCR_SCRPAD = 0x13c / sizeof(uint32_t), + NPCM8XX_GCR_USB1PHYCTL, + NPCM8XX_GCR_USB2PHYCTL, + NPCM8XX_GCR_USB3PHYCTL, + NPCM8XX_GCR_MFSEL1 = 0x260 / sizeof(uint32_t), + NPCM8XX_GCR_MFSEL2, + NPCM8XX_GCR_MFSEL3, + NPCM8XX_GCR_MFSEL4, + NPCM8XX_GCR_MFSEL5, + NPCM8XX_GCR_MFSEL6, + NPCM8XX_GCR_MFSEL7, + NPCM8XX_GCR_MFSEL_LK1 = 0x280 / sizeof(uint32_t), + NPCM8XX_GCR_MFSEL_LK2, + NPCM8XX_GCR_MFSEL_LK3, + NPCM8XX_GCR_MFSEL_LK4, + NPCM8XX_GCR_MFSEL_LK5, + NPCM8XX_GCR_MFSEL_LK6, + NPCM8XX_GCR_MFSEL_LK7, + NPCM8XX_GCR_MFSEL_SET1 = 0x2a0 / sizeof(uint32_t), + NPCM8XX_GCR_MFSEL_SET2, + NPCM8XX_GCR_MFSEL_SET3, + NPCM8XX_GCR_MFSEL_SET4, + NPCM8XX_GCR_MFSEL_SET5, + NPCM8XX_GCR_MFSEL_SET6, + NPCM8XX_GCR_MFSEL_SET7, + NPCM8XX_GCR_MFSEL_CLR1 = 0x2c0 / sizeof(uint32_t), + NPCM8XX_GCR_MFSEL_CLR2, + NPCM8XX_GCR_MFSEL_CLR3, + NPCM8XX_GCR_MFSEL_CLR4, + NPCM8XX_GCR_MFSEL_CLR5, + NPCM8XX_GCR_MFSEL_CLR6, + NPCM8XX_GCR_MFSEL_CLR7, + NPCM8XX_GCR_WD0RCRLK = 0x400 / sizeof(uint32_t), + NPCM8XX_GCR_WD1RCRLK, + NPCM8XX_GCR_WD2RCRLK, + NPCM8XX_GCR_SWRSTC1LK, + NPCM8XX_GCR_SWRSTC2LK, + NPCM8XX_GCR_SWRSTC3LK, + NPCM8XX_GCR_TIPRSTCLK, + NPCM8XX_GCR_CORSTCLK, + NPCM8XX_GCR_WD0RCRBLK, + NPCM8XX_GCR_WD1RCRBLK, + NPCM8XX_GCR_WD2RCRBLK, + NPCM8XX_GCR_SWRSTC1BLK, + NPCM8XX_GCR_SWRSTC2BLK, + NPCM8XX_GCR_SWRSTC3BLK, + NPCM8XX_GCR_TIPRSTCBLK, + NPCM8XX_GCR_CORSTCBLK, + /* 64 scratch pad registers start here. 0xe00 ~ 0xefc */ + NPCM8XX_GCR_SCRPAD_00 = 0xe00 / sizeof(uint32_t), + /* 32 semaphore registers start here. 0xf00 ~ 0xf7c */ + NPCM8XX_GCR_GP_SEMFR_00 = 0xf00 / sizeof(uint32_t), + NPCM8XX_GCR_GP_SEMFR_31 = 0xf7c / sizeof(uint32_t), +}; + +static const uint32_t npcm8xx_cold_reset_values[NPCM8XX_GCR_NR_REGS] = { + [NPCM8XX_GCR_PDID] = 0x04a35850, /* Arbel A1 */ + [NPCM8XX_GCR_MISCPE] = 0x0000ffff, + [NPCM8XX_GCR_A35_MODE] = 0xfff4ff30, + [NPCM8XX_GCR_SPSWC] = 0x00000003, + [NPCM8XX_GCR_INTCR] = 0x0010035e, + [NPCM8XX_GCR_HIFCR] = 0x0000004e, + [NPCM8XX_GCR_SD2SUR1] = 0xfdc80000, + [NPCM8XX_GCR_SD2SUR2] = 0x5200b130, + [NPCM8XX_GCR_INTCR2] = (1U << 19), /* DDR initialized */ + [NPCM8XX_GCR_RESSR] = 0x80000000, + [NPCM8XX_GCR_DAVCLVLR] = 0x5a00f3cf, + [NPCM8XX_GCR_INTCR3] = 0x5e001002, + [NPCM8XX_GCR_VSRCR] = 0x00004800, + [NPCM8XX_GCR_SCRPAD] = 0x00000008, + [NPCM8XX_GCR_USB1PHYCTL] = 0x034730e4, + [NPCM8XX_GCR_USB2PHYCTL] = 0x034730e4, + [NPCM8XX_GCR_USB3PHYCTL] = 0x034730e4, + /* All 32 semaphores should be initialized to 1. */ + [NPCM8XX_GCR_GP_SEMFR_00...NPCM8XX_GCR_GP_SEMFR_31] = 0x00000001, +}; + +static uint64_t npcm_gcr_read(void *opaque, hwaddr offset, unsigned size) +{ + uint32_t reg = offset / sizeof(uint32_t); + NPCMGCRState *s = opaque; + NPCMGCRClass *c = NPCM_GCR_GET_CLASS(s); + uint64_t value; + + if (reg >= c->nr_regs) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: offset 0x%04" HWADDR_PRIx " out of range\n", + __func__, offset); + return 0; + } + + switch (size) { + case 4: + value = s->regs[reg]; + break; + + case 8: + g_assert(!(reg & 1)); + value = deposit64(s->regs[reg], 32, 32, s->regs[reg + 1]); + break; + + default: + g_assert_not_reached(); + } + + trace_npcm_gcr_read(offset, value); + return value; +} + +static void npcm_gcr_write(void *opaque, hwaddr offset, + uint64_t v, unsigned size) +{ + uint32_t reg = offset / sizeof(uint32_t); + NPCMGCRState *s = opaque; + NPCMGCRClass *c = NPCM_GCR_GET_CLASS(s); + uint32_t value = v; + + trace_npcm_gcr_write(offset, v); + + if (reg >= c->nr_regs) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: offset 0x%04" HWADDR_PRIx " out of range\n", + __func__, offset); + return; + } + + switch (size) { + case 4: + switch (reg) { + case NPCM7XX_GCR_PDID: + case NPCM7XX_GCR_PWRON: + case NPCM7XX_GCR_INTSR: + qemu_log_mask(LOG_GUEST_ERROR, + "%s: register @ 0x%04" HWADDR_PRIx " is read-only\n", + __func__, offset); + return; + + case NPCM7XX_GCR_RESSR: + case NPCM7XX_GCR_CP2BST: + /* Write 1 to clear */ + value = s->regs[reg] & ~value; + break; + + case NPCM7XX_GCR_RLOCKR1: + case NPCM7XX_GCR_MDLR: + /* Write 1 to set */ + value |= s->regs[reg]; + break; + }; + s->regs[reg] = value; + break; + + case 8: + g_assert(!(reg & 1)); + s->regs[reg] = value; + s->regs[reg + 1] = extract64(v, 32, 32); + break; + + default: + g_assert_not_reached(); + } +} + +static bool npcm_gcr_check_mem_op(void *opaque, hwaddr offset, + unsigned size, bool is_write, + MemTxAttrs attrs) +{ + NPCMGCRClass *c = NPCM_GCR_GET_CLASS(opaque); + + if (offset >= c->nr_regs * sizeof(uint32_t)) { + return false; + } + + switch (size) { + case 4: + return true; + case 8: + if (offset >= NPCM8XX_GCR_SCRPAD_00 * sizeof(uint32_t) && + offset < (NPCM8XX_GCR_NR_REGS - 1) * sizeof(uint32_t)) { + return true; + } else { + return false; + } + default: + return false; + } +} + +static const struct MemoryRegionOps npcm_gcr_ops = { + .read = npcm_gcr_read, + .write = npcm_gcr_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 4, + .max_access_size = 8, + .accepts = npcm_gcr_check_mem_op, + .unaligned = false, + }, +}; + +static void npcm7xx_gcr_enter_reset(Object *obj, ResetType type) +{ + NPCMGCRState *s = NPCM_GCR(obj); + NPCMGCRClass *c = NPCM_GCR_GET_CLASS(obj); + + g_assert(sizeof(s->regs) >= sizeof(c->cold_reset_values)); + g_assert(sizeof(s->regs) >= c->nr_regs * sizeof(uint32_t)); + memcpy(s->regs, c->cold_reset_values, c->nr_regs * sizeof(uint32_t)); + /* These 3 registers are at the same location in both 7xx and 8xx. */ + s->regs[NPCM7XX_GCR_PWRON] = s->reset_pwron; + s->regs[NPCM7XX_GCR_MDLR] = s->reset_mdlr; + s->regs[NPCM7XX_GCR_INTCR3] = s->reset_intcr3; +} + +static void npcm8xx_gcr_enter_reset(Object *obj, ResetType type) +{ + NPCMGCRState *s = NPCM_GCR(obj); + NPCMGCRClass *c = NPCM_GCR_GET_CLASS(obj); + + memcpy(s->regs, c->cold_reset_values, c->nr_regs * sizeof(uint32_t)); + /* These 3 registers are at the same location in both 7xx and 8xx. */ + s->regs[NPCM8XX_GCR_PWRON] = s->reset_pwron; + s->regs[NPCM8XX_GCR_MDLR] = s->reset_mdlr; + s->regs[NPCM8XX_GCR_INTCR3] = s->reset_intcr3; + s->regs[NPCM8XX_GCR_SCRPAD_B] = s->reset_scrpad_b; +} + +static void npcm_gcr_realize(DeviceState *dev, Error **errp) +{ + ERRP_GUARD(); + NPCMGCRState *s = NPCM_GCR(dev); + uint64_t dram_size; + Object *obj; + + obj = object_property_get_link(OBJECT(dev), "dram-mr", errp); + if (!obj) { + error_prepend(errp, "%s: required dram-mr link not found: ", __func__); + return; + } + dram_size = memory_region_size(MEMORY_REGION(obj)); + if (!is_power_of_2(dram_size) || + dram_size < NPCM7XX_GCR_MIN_DRAM_SIZE || + dram_size > NPCM7XX_GCR_MAX_DRAM_SIZE) { + g_autofree char *sz = size_to_str(dram_size); + g_autofree char *min_sz = size_to_str(NPCM7XX_GCR_MIN_DRAM_SIZE); + g_autofree char *max_sz = size_to_str(NPCM7XX_GCR_MAX_DRAM_SIZE); + error_setg(errp, "%s: unsupported DRAM size %s", __func__, sz); + error_append_hint(errp, + "DRAM size must be a power of two between %s and %s," + " inclusive.\n", min_sz, max_sz); + return; + } + + /* Power-on reset value */ + s->reset_intcr3 = 0x00001002; + + /* + * The GMMAP (Graphics Memory Map) field is used by u-boot to detect the + * DRAM size, and is normally initialized by the boot block as part of DRAM + * training. However, since we don't have a complete emulation of the + * memory controller and try to make it look like it has already been + * initialized, the boot block will skip this initialization, and we need + * to make sure this field is set correctly up front. + * + * WARNING: some versions of u-boot only looks at bits 8 and 9, so 2 GiB of + * DRAM will be interpreted as 128 MiB. + * + * https://github.com/Nuvoton-Israel/u-boot/blob/2aef993bd2aafeb5408dbaad0f3ce099ee40c4aa/board/nuvoton/poleg/poleg.c#L244 + */ + s->reset_intcr3 |= ctz64(dram_size / NPCM7XX_GCR_MIN_DRAM_SIZE) << 8; + + /* + * The boot block starting from 0.0.6 for NPCM8xx SoCs stores the DRAM size + * in the SCRPAD2 registers. We need to set this field correctly since + * the initialization is skipped as we mentioned above. + * https://github.com/Nuvoton-Israel/u-boot/blob/npcm8mnx-v2019.01_tmp/board/nuvoton/arbel/arbel.c#L737 + */ + s->reset_scrpad_b = dram_size; +} + +static void npcm_gcr_init(Object *obj) +{ + NPCMGCRState *s = NPCM_GCR(obj); + + memory_region_init_io(&s->iomem, obj, &npcm_gcr_ops, s, + TYPE_NPCM_GCR, 4 * KiB); + sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem); +} + +static const VMStateDescription vmstate_npcm_gcr = { + .name = "npcm-gcr", + .version_id = 2, + .minimum_version_id = 2, + .fields = (const VMStateField[]) { + VMSTATE_UINT32_ARRAY(regs, NPCMGCRState, NPCM_GCR_MAX_NR_REGS), + VMSTATE_END_OF_LIST(), + }, +}; + +static const Property npcm_gcr_properties[] = { + DEFINE_PROP_UINT32("disabled-modules", NPCMGCRState, reset_mdlr, 0), + DEFINE_PROP_UINT32("power-on-straps", NPCMGCRState, reset_pwron, 0), +}; + +static void npcm_gcr_class_init(ObjectClass *klass, const void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = npcm_gcr_realize; + dc->vmsd = &vmstate_npcm_gcr; + + device_class_set_props(dc, npcm_gcr_properties); +} + +static void npcm7xx_gcr_class_init(ObjectClass *klass, const void *data) +{ + NPCMGCRClass *c = NPCM_GCR_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); + + dc->desc = "NPCM7xx System Global Control Registers"; + rc->phases.enter = npcm7xx_gcr_enter_reset; + + c->nr_regs = NPCM7XX_GCR_NR_REGS; + c->cold_reset_values = npcm7xx_cold_reset_values; + rc->phases.enter = npcm7xx_gcr_enter_reset; +} + +static void npcm8xx_gcr_class_init(ObjectClass *klass, const void *data) +{ + NPCMGCRClass *c = NPCM_GCR_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); + + dc->desc = "NPCM8xx System Global Control Registers"; + c->nr_regs = NPCM8XX_GCR_NR_REGS; + c->cold_reset_values = npcm8xx_cold_reset_values; + rc->phases.enter = npcm8xx_gcr_enter_reset; +} + +static const TypeInfo npcm_gcr_info[] = { + { + .name = TYPE_NPCM_GCR, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(NPCMGCRState), + .instance_init = npcm_gcr_init, + .class_size = sizeof(NPCMGCRClass), + .class_init = npcm_gcr_class_init, + .abstract = true, + }, + { + .name = TYPE_NPCM7XX_GCR, + .parent = TYPE_NPCM_GCR, + .class_init = npcm7xx_gcr_class_init, + }, + { + .name = TYPE_NPCM8XX_GCR, + .parent = TYPE_NPCM_GCR, + .class_init = npcm8xx_gcr_class_init, + }, +}; +DEFINE_TYPES(npcm_gcr_info) |