From 0b5c942ee9d454b3ca2fea4de9b75cb0ad5a2f5a Mon Sep 17 00:00:00 2001 From: "chunzhi.lin" Date: Mon, 20 Mar 2023 19:15:49 +0800 Subject: [PATCH] lib:utils:add sophgo-mcu, power management device --- lib/utils/reset/Kconfig | 5 + lib/utils/reset/fdt_reset_sophgo_mcu.c | 155 +++++++++++++++++++++++++ lib/utils/reset/objects.mk | 3 + platform/generic/configs/defconfig | 1 + 4 files changed, 164 insertions(+) create mode 100644 lib/utils/reset/fdt_reset_sophgo_mcu.c diff --git a/lib/utils/reset/Kconfig b/lib/utils/reset/Kconfig index 4748cc85..0a1703de 100644 --- a/lib/utils/reset/Kconfig +++ b/lib/utils/reset/Kconfig @@ -29,6 +29,11 @@ config FDT_RESET_SIFIVE_TEST select SYS_SIFIVE_TEST default n +config FDT_RESET_SOPHGO_MCU + bool "Sophgo MCU FDT reset driver" + select SYS_SOPHGO_MCU + default n + config FDT_RESET_SUNXI_WDT bool "Sunxi WDT FDT reset driver" default n diff --git a/lib/utils/reset/fdt_reset_sophgo_mcu.c b/lib/utils/reset/fdt_reset_sophgo_mcu.c new file mode 100644 index 00000000..8034bc49 --- /dev/null +++ b/lib/utils/reset/fdt_reset_sophgo_mcu.c @@ -0,0 +1,155 @@ +/* + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2023 Lin Chunzhi + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MANGO_BOARD_TYPE 0x80 + +#define REG_MCU_BOARD_TYPE 0x00 +#define REG_MCU_CMD 0x03 + +#define CMD_POWEROFF 0x02 +#define CMD_RESET 0x03 +#define CMD_REBOOT 0x07 + +static struct { + struct i2c_adapter *adapter; + uint32_t reg; +} mango; + +static int mango_system_reset_check(u32 type, u32 reason) +{ + switch (type) { + case SBI_SRST_RESET_TYPE_SHUTDOWN: + return 1; + case SBI_SRST_RESET_TYPE_COLD_REBOOT: + case SBI_SRST_RESET_TYPE_WARM_REBOOT: + return 255; + } + + return 0; +} + +static inline int mango_sanity_check(struct i2c_adapter *adap, uint32_t reg) +{ + static uint8_t val; + int ret; + + /* check board type*/ + ret = i2c_adapter_reg_read(adap, reg, REG_MCU_BOARD_TYPE, &val); + if (ret) + return ret; + + if (val != MANGO_BOARD_TYPE) + return SBI_ENODEV; + + return 0; +} + +static inline int mango_shutdown(struct i2c_adapter *adap, uint32_t reg) +{ + int ret; + ret = i2c_adapter_reg_write(adap, reg, REG_MCU_CMD, CMD_POWEROFF); + + if (ret) + return ret; + + return 0; +} + +static inline int mango_reset(struct i2c_adapter *adap, uint32_t reg) +{ + int ret; + ret = i2c_adapter_reg_write(adap, reg, REG_MCU_CMD, CMD_REBOOT); + + if (ret) + return ret; + + return 0; +} + +static void mango_system_reset(u32 type, u32 reason) +{ + struct i2c_adapter *adap = mango.adapter; + uint32_t reg = mango.reg; + int ret; + if (adap) { + /* sanity check */ + ret = mango_sanity_check(adap, reg); + if (ret) { + sbi_printf("%s: chip is not mango\n", __func__); + goto skip_reset; + } + + switch (type) { + case SBI_SRST_RESET_TYPE_SHUTDOWN: + mango_shutdown(adap, reg); + break; + case SBI_SRST_RESET_TYPE_COLD_REBOOT: + case SBI_SRST_RESET_TYPE_WARM_REBOOT: + mango_reset(adap, reg); + break; + } + } + +skip_reset: + sbi_hart_hang(); +} + +static struct sbi_system_reset_device mango_reset_i2c = { + .name = "mango-reset", + .system_reset_check = mango_system_reset_check, + .system_reset = mango_system_reset +}; + +static int mango_reset_init(void *fdt, int nodeoff, + const struct fdt_match *match) +{ + int rc, i2c_bus; + struct i2c_adapter *adapter; + uint64_t addr; + + /* we are mango,mcu node */ + rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL); + if (rc) + return rc; + + mango.reg = addr; + + /* find i2c bus parent node */ + i2c_bus = fdt_parent_offset(fdt, nodeoff); + if (i2c_bus < 0) + return i2c_bus; + + /* i2c adapter get */ + rc = fdt_i2c_adapter_get(fdt, i2c_bus, &adapter); + if (rc) + return rc; + + mango.adapter = adapter; + + sbi_system_reset_add_device(&mango_reset_i2c); + + return 0; +} + +static const struct fdt_match mango_reset_match[] = { + { .compatible = "mango,reset", .data = (void *)true}, + { }, +}; + +struct fdt_reset fdt_reset_sophgo_mcu = { + .match_table = mango_reset_match, + .init = mango_reset_init, +}; diff --git a/lib/utils/reset/objects.mk b/lib/utils/reset/objects.mk index c9f851cd..209a1fba 100644 --- a/lib/utils/reset/objects.mk +++ b/lib/utils/reset/objects.mk @@ -23,6 +23,9 @@ libsbiutils-objs-$(CONFIG_FDT_RESET_HTIF) += reset/fdt_reset_htif.o carray-fdt_reset_drivers-$(CONFIG_FDT_RESET_SIFIVE_TEST) += fdt_reset_sifive_test libsbiutils-objs-$(CONFIG_FDT_RESET_SIFIVE_TEST) += reset/fdt_reset_sifive_test.o +carray-fdt_reset_drivers-$(CONFIG_FDT_RESET_SOPHGO_MCU) += fdt_reset_sophgo_mcu +libsbiutils-objs-$(CONFIG_FDT_RESET_SOPHGO_MCU) += reset/fdt_reset_sophgo_mcu.o + carray-fdt_reset_drivers-$(CONFIG_FDT_RESET_SUNXI_WDT) += fdt_reset_sunxi_wdt libsbiutils-objs-$(CONFIG_FDT_RESET_SUNXI_WDT) += reset/fdt_reset_sunxi_wdt.o diff --git a/platform/generic/configs/defconfig b/platform/generic/configs/defconfig index d5c34009..b20ab30a 100644 --- a/platform/generic/configs/defconfig +++ b/platform/generic/configs/defconfig @@ -23,6 +23,7 @@ CONFIG_FDT_RESET_ATCWDT200=y CONFIG_FDT_RESET_GPIO=y CONFIG_FDT_RESET_HTIF=y CONFIG_FDT_RESET_SIFIVE_TEST=y +CONFIG_FDT_RESET_SOPHGO_MCU=y CONFIG_FDT_RESET_SUNXI_WDT=y CONFIG_FDT_RESET_THEAD=y CONFIG_FDT_SERIAL=y