| 1 | /* |
| 2 | * ASPEED Serial GPIO Controller |
| 3 | * |
| 4 | * Copyright 2025 Google LLC. |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | #ifndef ASPEED_SGPIO_H |
| 9 | #define ASPEED_SGPIO_H |
| 10 | |
| 11 | #include "hw/core/sysbus.h" |
| 12 | #include "qom/object.h" |
| 13 | #include "hw/core/registerfields.h" |
| 14 | |
| 15 | #define TYPE_ASPEED_SGPIO "aspeed.sgpio" |
| 16 | OBJECT_DECLARE_TYPE(AspeedSGPIOState, AspeedSGPIOClass, ASPEED_SGPIO) |
| 17 | |
| 18 | #define ASPEED_SGPIO_MAX_PIN_PAIR 256 |
| 19 | #define ASPEED_SGPIO_MAX_INT 8 |
| 20 | |
| 21 | /* AST2700 SGPIO Register Address Offsets */ |
| 22 | REG32(SGPIO_INT_STATUS_0, 0x40) |
| 23 | REG32(SGPIO_INT_STATUS_1, 0x44) |
| 24 | REG32(SGPIO_INT_STATUS_2, 0x48) |
| 25 | REG32(SGPIO_INT_STATUS_3, 0x4C) |
| 26 | REG32(SGPIO_INT_STATUS_4, 0x50) |
| 27 | REG32(SGPIO_INT_STATUS_5, 0x54) |
| 28 | REG32(SGPIO_INT_STATUS_6, 0x58) |
| 29 | REG32(SGPIO_INT_STATUS_7, 0x5C) |
| 30 | /* AST2700 SGPIO_0 - SGPIO_255 Control Register */ |
| 31 | REG32(SGPIO_0_CONTROL, 0x80) |
| 32 | SHARED_FIELD(SGPIO_SERIAL_OUT_VAL, 0, 1) |
| 33 | SHARED_FIELD(SGPIO_PARALLEL_OUT_VAL, 1, 1) |
| 34 | SHARED_FIELD(SGPIO_INT_EN, 2, 1) |
| 35 | SHARED_FIELD(SGPIO_INT_TYPE, 3, 3) |
| 36 | SHARED_FIELD(SGPIO_RESET_POLARITY, 6, 1) |
| 37 | SHARED_FIELD(SGPIO_RESERVED_1, 7, 2) |
| 38 | SHARED_FIELD(SGPIO_INPUT_MASK, 9, 1) |
| 39 | SHARED_FIELD(SGPIO_PARALLEL_EN, 10, 1) |
| 40 | SHARED_FIELD(SGPIO_PARALLEL_IN_MODE, 11, 1) |
| 41 | SHARED_FIELD(SGPIO_INT_STATUS, 12, 1) |
| 42 | SHARED_FIELD(SGPIO_SERIAL_IN_VAL, 13, 1) |
| 43 | SHARED_FIELD(SGPIO_PARALLEL_IN_VAL, 14, 1) |
| 44 | SHARED_FIELD(SGPIO_RESERVED_2, 15, 12) |
| 45 | SHARED_FIELD(SGPIO_WRITE_PROTECT, 31, 1) |
| 46 | REG32(SGPIO_255_CONTROL, 0x47C) |
| 47 | |
| 48 | struct AspeedSGPIOClass { |
| 49 | SysBusDeviceClass parent_class; |
| 50 | uint32_t nr_sgpio_pin_pairs; |
| 51 | uint64_t mem_size; |
| 52 | const MemoryRegionOps *reg_ops; |
| 53 | }; |
| 54 | |
| 55 | struct AspeedSGPIOState { |
| 56 | /* <private> */ |
| 57 | SysBusDevice parent; |
| 58 | |
| 59 | /*< public >*/ |
| 60 | MemoryRegion iomem; |
| 61 | int pending; |
| 62 | qemu_irq irq; |
| 63 | qemu_irq sgpios[ASPEED_SGPIO_MAX_PIN_PAIR]; |
| 64 | uint32_t ctrl_regs[ASPEED_SGPIO_MAX_PIN_PAIR]; |
| 65 | uint32_t int_regs[ASPEED_SGPIO_MAX_INT]; |
| 66 | }; |
| 67 | |
| 68 | #endif /* ASPEED_SGPIO_H */ |