diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 5484a65f66b95..d28c4401a3109 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -153,20 +153,6 @@ config RESET_MCHP_SPARX5 help This driver supports switch core reset for the Microchip Sparx5 SoC. -config RESET_MESON - tristate "Meson Reset Driver" - depends on ARCH_MESON || COMPILE_TEST - default ARCH_MESON - help - This enables the reset driver for Amlogic Meson SoCs. - -config RESET_MESON_AUDIO_ARB - tristate "Meson Audio Memory Arbiter Reset Driver" - depends on ARCH_MESON || COMPILE_TEST - help - This enables the reset driver for Audio Memory Arbiter of - Amlogic's A113 based SoCs - config RESET_NPCM bool "NPCM BMC Reset Driver" if COMPILE_TEST default ARCH_NPCM @@ -356,6 +342,7 @@ config RESET_ZYNQMP help This enables the reset controller driver for Xilinx ZynqMP SoCs. +source "drivers/reset/amlogic/Kconfig" source "drivers/reset/starfive/Kconfig" source "drivers/reset/sti/Kconfig" source "drivers/reset/hisilicon/Kconfig" diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 4411a2a124d7d..677c4d1e26320 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 obj-y += core.o +obj-y += amlogic/ obj-y += hisilicon/ obj-y += starfive/ obj-y += sti/ @@ -21,8 +22,6 @@ obj-$(CONFIG_RESET_K210) += reset-k210.o obj-$(CONFIG_RESET_LANTIQ) += reset-lantiq.o obj-$(CONFIG_RESET_LPC18XX) += reset-lpc18xx.o obj-$(CONFIG_RESET_MCHP_SPARX5) += reset-microchip-sparx5.o -obj-$(CONFIG_RESET_MESON) += reset-meson.o -obj-$(CONFIG_RESET_MESON_AUDIO_ARB) += reset-meson-audio-arb.o obj-$(CONFIG_RESET_NPCM) += reset-npcm.o obj-$(CONFIG_RESET_NUVOTON_MA35D1) += reset-ma35d1.o obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o diff --git a/drivers/reset/amlogic/Kconfig b/drivers/reset/amlogic/Kconfig new file mode 100644 index 0000000000000..3bee9fd602694 --- /dev/null +++ b/drivers/reset/amlogic/Kconfig @@ -0,0 +1,27 @@ +config RESET_MESON_COMMON + tristate + select REGMAP + +config RESET_MESON + tristate "Meson Reset Driver" + depends on ARCH_MESON || COMPILE_TEST + default ARCH_MESON + select REGMAP_MMIO + select RESET_MESON_COMMON + help + This enables the reset driver for Amlogic SoCs. + +config RESET_MESON_AUX + tristate "Meson Reset Auxiliary Driver" + depends on ARCH_MESON || COMPILE_TEST + select AUXILIARY_BUS + select RESET_MESON_COMMON + help + This enables the reset auxiliary driver for Amlogic SoCs. + +config RESET_MESON_AUDIO_ARB + tristate "Meson Audio Memory Arbiter Reset Driver" + depends on ARCH_MESON || COMPILE_TEST + help + This enables the reset driver for Audio Memory Arbiter of + Amlogic's A113 based SoCs diff --git a/drivers/reset/amlogic/Makefile b/drivers/reset/amlogic/Makefile new file mode 100644 index 0000000000000..ca99a691282c2 --- /dev/null +++ b/drivers/reset/amlogic/Makefile @@ -0,0 +1,4 @@ +obj-$(CONFIG_RESET_MESON) += reset-meson.o +obj-$(CONFIG_RESET_MESON_AUX) += reset-meson-aux.o +obj-$(CONFIG_RESET_MESON_COMMON) += reset-meson-common.o +obj-$(CONFIG_RESET_MESON_AUDIO_ARB) += reset-meson-audio-arb.o diff --git a/drivers/reset/reset-meson-audio-arb.c b/drivers/reset/amlogic/reset-meson-audio-arb.c similarity index 100% rename from drivers/reset/reset-meson-audio-arb.c rename to drivers/reset/amlogic/reset-meson-audio-arb.c diff --git a/drivers/reset/amlogic/reset-meson-aux.c b/drivers/reset/amlogic/reset-meson-aux.c new file mode 100644 index 0000000000000..dd8453001db9c --- /dev/null +++ b/drivers/reset/amlogic/reset-meson-aux.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Amlogic Meson Reset Auxiliary driver + * + * Copyright (c) 2024 BayLibre, SAS. + * Author: Jerome Brunet + */ + +#include +#include +#include +#include +#include +#include + +#include "reset-meson.h" +#include + +static DEFINE_IDA(meson_rst_aux_ida); + +struct meson_reset_adev { + struct auxiliary_device adev; + struct regmap *map; +}; + +#define to_meson_reset_adev(_adev) \ + container_of((_adev), struct meson_reset_adev, adev) + +static const struct meson_reset_param meson_g12a_audio_param = { + .reset_ops = &meson_reset_toggle_ops, + .reset_num = 26, + .level_offset = 0x24, +}; + +static const struct meson_reset_param meson_sm1_audio_param = { + .reset_ops = &meson_reset_toggle_ops, + .reset_num = 39, + .level_offset = 0x28, +}; + +static const struct auxiliary_device_id meson_reset_aux_ids[] = { + { + .name = "axg-audio-clkc.rst-g12a", + .driver_data = (kernel_ulong_t)&meson_g12a_audio_param, + }, { + .name = "axg-audio-clkc.rst-sm1", + .driver_data = (kernel_ulong_t)&meson_sm1_audio_param, + }, {} +}; +MODULE_DEVICE_TABLE(auxiliary, meson_reset_aux_ids); + +static int meson_reset_aux_probe(struct auxiliary_device *adev, + const struct auxiliary_device_id *id) +{ + const struct meson_reset_param *param = + (const struct meson_reset_param *)(id->driver_data); + struct meson_reset_adev *raux = + to_meson_reset_adev(adev); + + return meson_reset_controller_register(&adev->dev, raux->map, param); +} + +static struct auxiliary_driver meson_reset_aux_driver = { + .probe = meson_reset_aux_probe, + .id_table = meson_reset_aux_ids, +}; +module_auxiliary_driver(meson_reset_aux_driver); + +static void meson_rst_aux_release(struct device *dev) +{ + struct auxiliary_device *adev = to_auxiliary_dev(dev); + struct meson_reset_adev *raux = + to_meson_reset_adev(adev); + + ida_free(&meson_rst_aux_ida, adev->id); + kfree(raux); +} + +static void meson_rst_aux_unregister_adev(void *_adev) +{ + struct auxiliary_device *adev = _adev; + + auxiliary_device_delete(adev); + auxiliary_device_uninit(adev); +} + +int devm_meson_rst_aux_register(struct device *dev, + struct regmap *map, + const char *adev_name) +{ + struct meson_reset_adev *raux; + struct auxiliary_device *adev; + int ret; + + raux = kzalloc(sizeof(*raux), GFP_KERNEL); + if (!raux) + return -ENOMEM; + + ret = ida_alloc(&meson_rst_aux_ida, GFP_KERNEL); + if (ret < 0) + goto raux_free; + + raux->map = map; + + adev = &raux->adev; + adev->id = ret; + adev->name = adev_name; + adev->dev.parent = dev; + adev->dev.release = meson_rst_aux_release; + device_set_of_node_from_dev(&adev->dev, dev); + + ret = auxiliary_device_init(adev); + if (ret) + goto ida_free; + + ret = __auxiliary_device_add(adev, dev->driver->name); + if (ret) { + auxiliary_device_uninit(adev); + return ret; + } + + return devm_add_action_or_reset(dev, meson_rst_aux_unregister_adev, + adev); + +ida_free: + ida_free(&meson_rst_aux_ida, adev->id); +raux_free: + kfree(raux); + return ret; +} +EXPORT_SYMBOL_GPL(devm_meson_rst_aux_register); + +MODULE_DESCRIPTION("Amlogic Meson Reset Auxiliary driver"); +MODULE_AUTHOR("Jerome Brunet "); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_IMPORT_NS(MESON_RESET); diff --git a/drivers/reset/amlogic/reset-meson-common.c b/drivers/reset/amlogic/reset-meson-common.c new file mode 100644 index 0000000000000..38a767c06fc71 --- /dev/null +++ b/drivers/reset/amlogic/reset-meson-common.c @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Amlogic Meson Reset core functions + * + * Copyright (c) 2016-2024 BayLibre, SAS. + * Authors: Neil Armstrong + * Jerome Brunet + */ + +#include +#include +#include +#include + +#include "reset-meson.h" + +struct meson_reset { + const struct meson_reset_param *param; + struct reset_controller_dev rcdev; + struct regmap *map; +}; + +static void meson_reset_offset_and_bit(struct meson_reset *data, + unsigned long id, + unsigned int *offset, + unsigned int *bit) +{ + unsigned int stride = regmap_get_reg_stride(data->map); + + *offset = (id / (stride * BITS_PER_BYTE)) * stride; + *bit = id % (stride * BITS_PER_BYTE); +} + +static int meson_reset_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct meson_reset *data = + container_of(rcdev, struct meson_reset, rcdev); + unsigned int offset, bit; + + meson_reset_offset_and_bit(data, id, &offset, &bit); + offset += data->param->reset_offset; + + return regmap_write(data->map, offset, BIT(bit)); +} + +static int meson_reset_level(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct meson_reset *data = + container_of(rcdev, struct meson_reset, rcdev); + unsigned int offset, bit; + + meson_reset_offset_and_bit(data, id, &offset, &bit); + offset += data->param->level_offset; + assert ^= data->param->level_low_reset; + + return regmap_update_bits(data->map, offset, + BIT(bit), assert ? BIT(bit) : 0); +} + +static int meson_reset_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct meson_reset *data = + container_of(rcdev, struct meson_reset, rcdev); + unsigned int val, offset, bit; + + meson_reset_offset_and_bit(data, id, &offset, &bit); + offset += data->param->level_offset; + + regmap_read(data->map, offset, &val); + val = !!(BIT(bit) & val); + + return val ^ data->param->level_low_reset; +} + +static int meson_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return meson_reset_level(rcdev, id, true); +} + +static int meson_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return meson_reset_level(rcdev, id, false); +} + +static int meson_reset_level_toggle(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int ret; + + ret = meson_reset_assert(rcdev, id); + if (ret) + return ret; + + return meson_reset_deassert(rcdev, id); +} + +const struct reset_control_ops meson_reset_ops = { + .reset = meson_reset_reset, + .assert = meson_reset_assert, + .deassert = meson_reset_deassert, + .status = meson_reset_status, +}; +EXPORT_SYMBOL_NS_GPL(meson_reset_ops, MESON_RESET); + +const struct reset_control_ops meson_reset_toggle_ops = { + .reset = meson_reset_level_toggle, + .assert = meson_reset_assert, + .deassert = meson_reset_deassert, + .status = meson_reset_status, +}; +EXPORT_SYMBOL_NS_GPL(meson_reset_toggle_ops, MESON_RESET); + +int meson_reset_controller_register(struct device *dev, struct regmap *map, + const struct meson_reset_param *param) +{ + struct meson_reset *data; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->param = param; + data->map = map; + data->rcdev.owner = dev->driver->owner; + data->rcdev.nr_resets = param->reset_num; + data->rcdev.ops = data->param->reset_ops; + data->rcdev.of_node = dev->of_node; + + return devm_reset_controller_register(dev, &data->rcdev); +} +EXPORT_SYMBOL_NS_GPL(meson_reset_controller_register, MESON_RESET); + +MODULE_DESCRIPTION("Amlogic Meson Reset Core function"); +MODULE_AUTHOR("Neil Armstrong "); +MODULE_AUTHOR("Jerome Brunet "); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_IMPORT_NS(MESON_RESET); diff --git a/drivers/reset/amlogic/reset-meson.c b/drivers/reset/amlogic/reset-meson.c new file mode 100644 index 0000000000000..6ae4ed6b7f8ba --- /dev/null +++ b/drivers/reset/amlogic/reset-meson.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* + * Amlogic Meson Reset Controller driver + * + * Copyright (c) 2016-2024 BayLibre, SAS. + * Authors: Neil Armstrong + * Jerome Brunet + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "reset-meson.h" + +static const struct meson_reset_param meson8b_param = { + .reset_ops = &meson_reset_ops, + .reset_num = 256, + .reset_offset = 0x0, + .level_offset = 0x7c, + .level_low_reset = true, +}; + +static const struct meson_reset_param meson_a1_param = { + .reset_ops = &meson_reset_ops, + .reset_num = 96, + .reset_offset = 0x0, + .level_offset = 0x40, + .level_low_reset = true, +}; + +static const struct meson_reset_param meson_s4_param = { + .reset_ops = &meson_reset_ops, + .reset_num = 192, + .reset_offset = 0x0, + .level_offset = 0x40, + .level_low_reset = true, +}; + +static const struct meson_reset_param t7_param = { + .reset_num = 224, + .reset_offset = 0x0, + .level_offset = 0x40, + .level_low_reset = true, +}; + +static const struct of_device_id meson_reset_dt_ids[] = { + { .compatible = "amlogic,meson8b-reset", .data = &meson8b_param}, + { .compatible = "amlogic,meson-gxbb-reset", .data = &meson8b_param}, + { .compatible = "amlogic,meson-axg-reset", .data = &meson8b_param}, + { .compatible = "amlogic,meson-a1-reset", .data = &meson_a1_param}, + { .compatible = "amlogic,meson-s4-reset", .data = &meson_s4_param}, + { .compatible = "amlogic,c3-reset", .data = &meson_s4_param}, + { .compatible = "amlogic,t7-reset", .data = &t7_param}, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, meson_reset_dt_ids); + +static const struct regmap_config regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +static int meson_reset_probe(struct platform_device *pdev) +{ + const struct meson_reset_param *param; + struct device *dev = &pdev->dev; + struct regmap *map; + void __iomem *base; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + param = device_get_match_data(dev); + if (!param) + return -ENODEV; + + map = devm_regmap_init_mmio(dev, base, ®map_config); + if (IS_ERR(map)) + return dev_err_probe(dev, PTR_ERR(map), + "can't init regmap mmio region\n"); + + return meson_reset_controller_register(dev, map, param); +} + +static struct platform_driver meson_reset_driver = { + .probe = meson_reset_probe, + .driver = { + .name = "meson_reset", + .of_match_table = meson_reset_dt_ids, + }, +}; +module_platform_driver(meson_reset_driver); + +MODULE_DESCRIPTION("Amlogic Meson Reset Controller driver"); +MODULE_AUTHOR("Neil Armstrong "); +MODULE_AUTHOR("Jerome Brunet "); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_IMPORT_NS(MESON_RESET); diff --git a/drivers/reset/amlogic/reset-meson.h b/drivers/reset/amlogic/reset-meson.h new file mode 100644 index 0000000000000..2051e126dc3a2 --- /dev/null +++ b/drivers/reset/amlogic/reset-meson.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* + * Copyright (c) 2024 BayLibre, SAS. + * Author: Jerome Brunet + */ + +#ifndef __MESON_RESET_H +#define __MESON_RESET_H + +#include +#include +#include + +struct meson_reset_param { + const struct reset_control_ops *reset_ops; + unsigned int reset_num; + unsigned int reset_offset; + unsigned int level_offset; + bool level_low_reset; +}; + +int meson_reset_controller_register(struct device *dev, struct regmap *map, + const struct meson_reset_param *param); + +extern const struct reset_control_ops meson_reset_ops; +extern const struct reset_control_ops meson_reset_toggle_ops; + +#endif /* __MESON_RESET_H */ diff --git a/drivers/reset/reset-meson.c b/drivers/reset/reset-meson.c deleted file mode 100644 index 1e9fca3e30e8e..0000000000000 --- a/drivers/reset/reset-meson.c +++ /dev/null @@ -1,159 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause -/* - * Amlogic Meson Reset Controller driver - * - * Copyright (c) 2016 BayLibre, SAS. - * Author: Neil Armstrong - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define BITS_PER_REG 32 - -struct meson_reset_param { - int reg_count; - int level_offset; -}; - -struct meson_reset { - void __iomem *reg_base; - const struct meson_reset_param *param; - struct reset_controller_dev rcdev; - spinlock_t lock; -}; - -static int meson_reset_reset(struct reset_controller_dev *rcdev, - unsigned long id) -{ - struct meson_reset *data = - container_of(rcdev, struct meson_reset, rcdev); - unsigned int bank = id / BITS_PER_REG; - unsigned int offset = id % BITS_PER_REG; - void __iomem *reg_addr = data->reg_base + (bank << 2); - - writel(BIT(offset), reg_addr); - - return 0; -} - -static int meson_reset_level(struct reset_controller_dev *rcdev, - unsigned long id, bool assert) -{ - struct meson_reset *data = - container_of(rcdev, struct meson_reset, rcdev); - unsigned int bank = id / BITS_PER_REG; - unsigned int offset = id % BITS_PER_REG; - void __iomem *reg_addr; - unsigned long flags; - u32 reg; - - reg_addr = data->reg_base + data->param->level_offset + (bank << 2); - - spin_lock_irqsave(&data->lock, flags); - - reg = readl(reg_addr); - if (assert) - writel(reg & ~BIT(offset), reg_addr); - else - writel(reg | BIT(offset), reg_addr); - - spin_unlock_irqrestore(&data->lock, flags); - - return 0; -} - -static int meson_reset_assert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - return meson_reset_level(rcdev, id, true); -} - -static int meson_reset_deassert(struct reset_controller_dev *rcdev, - unsigned long id) -{ - return meson_reset_level(rcdev, id, false); -} - -static const struct reset_control_ops meson_reset_ops = { - .reset = meson_reset_reset, - .assert = meson_reset_assert, - .deassert = meson_reset_deassert, -}; - -static const struct meson_reset_param meson8b_param = { - .reg_count = 8, - .level_offset = 0x7c, -}; - -static const struct meson_reset_param meson_a1_param = { - .reg_count = 3, - .level_offset = 0x40, -}; - -static const struct meson_reset_param meson_s4_param = { - .reg_count = 6, - .level_offset = 0x40, -}; - -static const struct meson_reset_param t7_param = { - .reg_count = 7, - .level_offset = 0x40, -}; - -static const struct of_device_id meson_reset_dt_ids[] = { - { .compatible = "amlogic,meson8b-reset", .data = &meson8b_param}, - { .compatible = "amlogic,meson-gxbb-reset", .data = &meson8b_param}, - { .compatible = "amlogic,meson-axg-reset", .data = &meson8b_param}, - { .compatible = "amlogic,meson-a1-reset", .data = &meson_a1_param}, - { .compatible = "amlogic,meson-s4-reset", .data = &meson_s4_param}, - { .compatible = "amlogic,c3-reset", .data = &meson_s4_param}, - { .compatible = "amlogic,t7-reset", .data = &t7_param}, - { /* sentinel */ }, -}; -MODULE_DEVICE_TABLE(of, meson_reset_dt_ids); - -static int meson_reset_probe(struct platform_device *pdev) -{ - struct meson_reset *data; - - data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); - if (!data) - return -ENOMEM; - - data->reg_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(data->reg_base)) - return PTR_ERR(data->reg_base); - - data->param = of_device_get_match_data(&pdev->dev); - if (!data->param) - return -ENODEV; - - spin_lock_init(&data->lock); - - data->rcdev.owner = THIS_MODULE; - data->rcdev.nr_resets = data->param->reg_count * BITS_PER_REG; - data->rcdev.ops = &meson_reset_ops; - data->rcdev.of_node = pdev->dev.of_node; - - return devm_reset_controller_register(&pdev->dev, &data->rcdev); -} - -static struct platform_driver meson_reset_driver = { - .probe = meson_reset_probe, - .driver = { - .name = "meson_reset", - .of_match_table = meson_reset_dt_ids, - }, -}; -module_platform_driver(meson_reset_driver); - -MODULE_DESCRIPTION("Amlogic Meson Reset Controller driver"); -MODULE_AUTHOR("Neil Armstrong "); -MODULE_LICENSE("Dual BSD/GPL"); diff --git a/include/soc/amlogic/reset-meson-aux.h b/include/soc/amlogic/reset-meson-aux.h new file mode 100644 index 0000000000000..d8a15d48c9849 --- /dev/null +++ b/include/soc/amlogic/reset-meson-aux.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __SOC_RESET_MESON_AUX_H +#define __SOC_RESET_MESON_AUX_H + +#include + +struct device; +struct regmap; + +#if IS_ENABLED(CONFIG_RESET_MESON_AUX) +int devm_meson_rst_aux_register(struct device *dev, + struct regmap *map, + const char *adev_name); +#else +static inline int devm_meson_rst_aux_register(struct device *dev, + struct regmap *map, + const char *adev_name) +{ + return 0; +} +#endif + +#endif /* __SOC_RESET_MESON_AUX_H */