diff options
Diffstat (limited to 'drivers/reset')
| -rw-r--r-- | drivers/reset/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/reset/Makefile | 2 | ||||
| -rw-r--r-- | drivers/reset/reset-qcom-aoss.c | 133 | ||||
| -rw-r--r-- | drivers/reset/reset-simple.c | 1 | ||||
| -rw-r--r-- | drivers/reset/reset-uniphier-usb3.c | 171 | ||||
| -rw-r--r-- | drivers/reset/reset-uniphier.c | 9 |
6 files changed, 335 insertions, 0 deletions
diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index c0b292be1b72..a70262cb7e56 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -82,6 +82,15 @@ config RESET_PISTACHIO help This enables the reset driver for ImgTec Pistachio SoCs. +config RESET_QCOM_AOSS + bool "Qcom AOSS Reset Driver" + depends on ARCH_QCOM || COMPILE_TEST + help + This enables the AOSS (always on subsystem) reset driver + for Qualcomm SDM845 SoCs. Say Y if you want to control + reset signals provided by AOSS for Modem, Venus, ADSP, + GPU, Camera, Wireless, Display subsystem. Otherwise, say N. + config RESET_SIMPLE bool "Simple Reset Controller Driver" if COMPILE_TEST default ARCH_SOCFPGA || ARCH_STM32 || ARCH_STRATIX10 || ARCH_SUNXI || ARCH_ZX || ARCH_ASPEED @@ -138,6 +147,16 @@ config RESET_UNIPHIER Say Y if you want to control reset signals provided by System Control block, Media I/O block, Peripheral Block. +config RESET_UNIPHIER_USB3 + tristate "USB3 reset driver for UniPhier SoCs" + depends on (ARCH_UNIPHIER || COMPILE_TEST) && OF + default ARCH_UNIPHIER + select RESET_SIMPLE + help + Support for the USB3 core reset on UniPhier SoCs. + Say Y if you want to control reset signals provided by + USB3 glue layer. + config RESET_ZYNQ bool "ZYNQ Reset Driver" if COMPILE_TEST default ARCH_ZYNQ diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index c1261dcfe9ad..0676b6b1976f 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -14,11 +14,13 @@ obj-$(CONFIG_RESET_LPC18XX) += reset-lpc18xx.o obj-$(CONFIG_RESET_MESON) += reset-meson.o obj-$(CONFIG_RESET_OXNAS) += reset-oxnas.o obj-$(CONFIG_RESET_PISTACHIO) += reset-pistachio.o +obj-$(CONFIG_RESET_QCOM_AOSS) += reset-qcom-aoss.o obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o obj-$(CONFIG_RESET_STM32MP157) += reset-stm32mp1.o obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o +obj-$(CONFIG_RESET_UNIPHIER_USB3) += reset-uniphier-usb3.o obj-$(CONFIG_RESET_ZYNQ) += reset-zynq.o diff --git a/drivers/reset/reset-qcom-aoss.c b/drivers/reset/reset-qcom-aoss.c new file mode 100644 index 000000000000..36db96750450 --- /dev/null +++ b/drivers/reset/reset-qcom-aoss.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 The Linux Foundation. All rights reserved. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/of_device.h> +#include <dt-bindings/reset/qcom,sdm845-aoss.h> + +struct qcom_aoss_reset_map { + unsigned int reg; +}; + +struct qcom_aoss_desc { + const struct qcom_aoss_reset_map *resets; + size_t num_resets; +}; + +struct qcom_aoss_reset_data { + struct reset_controller_dev rcdev; + void __iomem *base; + const struct qcom_aoss_desc *desc; +}; + +static const struct qcom_aoss_reset_map sdm845_aoss_resets[] = { + [AOSS_CC_MSS_RESTART] = {0x10000}, + [AOSS_CC_CAMSS_RESTART] = {0x11000}, + [AOSS_CC_VENUS_RESTART] = {0x12000}, + [AOSS_CC_GPU_RESTART] = {0x13000}, + [AOSS_CC_DISPSS_RESTART] = {0x14000}, + [AOSS_CC_WCSS_RESTART] = {0x20000}, + [AOSS_CC_LPASS_RESTART] = {0x30000}, +}; + +static const struct qcom_aoss_desc sdm845_aoss_desc = { + .resets = sdm845_aoss_resets, + .num_resets = ARRAY_SIZE(sdm845_aoss_resets), +}; + +static inline struct qcom_aoss_reset_data *to_qcom_aoss_reset_data( + struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct qcom_aoss_reset_data, rcdev); +} + +static int qcom_aoss_control_assert(struct reset_controller_dev *rcdev, + unsigned long idx) +{ + struct qcom_aoss_reset_data *data = to_qcom_aoss_reset_data(rcdev); + const struct qcom_aoss_reset_map *map = &data->desc->resets[idx]; + + writel(1, data->base + map->reg); + /* Wait 6 32kHz sleep cycles for reset */ + usleep_range(200, 300); + return 0; +} + +static int qcom_aoss_control_deassert(struct reset_controller_dev *rcdev, + unsigned long idx) +{ + struct qcom_aoss_reset_data *data = to_qcom_aoss_reset_data(rcdev); + const struct qcom_aoss_reset_map *map = &data->desc->resets[idx]; + + writel(0, data->base + map->reg); + /* Wait 6 32kHz sleep cycles for reset */ + usleep_range(200, 300); + return 0; +} + +static int qcom_aoss_control_reset(struct reset_controller_dev *rcdev, + unsigned long idx) +{ + qcom_aoss_control_assert(rcdev, idx); + + return qcom_aoss_control_deassert(rcdev, idx); +} + +static const struct reset_control_ops qcom_aoss_reset_ops = { + .reset = qcom_aoss_control_reset, + .assert = qcom_aoss_control_assert, + .deassert = qcom_aoss_control_deassert, +}; + +static int qcom_aoss_reset_probe(struct platform_device *pdev) +{ + struct qcom_aoss_reset_data *data; + struct device *dev = &pdev->dev; + const struct qcom_aoss_desc *desc; + struct resource *res; + + desc = of_device_get_match_data(dev); + if (!desc) + return -EINVAL; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->desc = desc; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->base = devm_ioremap_resource(dev, res); + if (IS_ERR(data->base)) + return PTR_ERR(data->base); + + data->rcdev.owner = THIS_MODULE; + data->rcdev.ops = &qcom_aoss_reset_ops; + data->rcdev.nr_resets = desc->num_resets; + data->rcdev.of_node = dev->of_node; + + return devm_reset_controller_register(dev, &data->rcdev); +} + +static const struct of_device_id qcom_aoss_reset_of_match[] = { + { .compatible = "qcom,sdm845-aoss-cc", .data = &sdm845_aoss_desc }, + {} +}; + +static struct platform_driver qcom_aoss_reset_driver = { + .probe = qcom_aoss_reset_probe, + .driver = { + .name = "qcom_aoss_reset", + .of_match_table = qcom_aoss_reset_of_match, + }, +}; + +builtin_platform_driver(qcom_aoss_reset_driver); + +MODULE_DESCRIPTION("Qualcomm AOSS Reset Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c index f7ce8910a392..a91107fc9e27 100644 --- a/drivers/reset/reset-simple.c +++ b/drivers/reset/reset-simple.c @@ -87,6 +87,7 @@ const struct reset_control_ops reset_simple_ops = { .deassert = reset_simple_deassert, .status = reset_simple_status, }; +EXPORT_SYMBOL_GPL(reset_simple_ops); /** * struct reset_simple_devdata - simple reset controller properties diff --git a/drivers/reset/reset-uniphier-usb3.c b/drivers/reset/reset-uniphier-usb3.c new file mode 100644 index 000000000000..ffa1b19b594d --- /dev/null +++ b/drivers/reset/reset-uniphier-usb3.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// reset-uniphier-usb3.c - USB3 reset driver for UniPhier +// Copyright 2018 Socionext Inc. +// Author: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> + +#include <linux/clk.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/reset.h> + +#include "reset-simple.h" + +#define MAX_CLKS 2 +#define MAX_RSTS 2 + +struct uniphier_usb3_reset_soc_data { + int nclks; + const char * const *clock_names; + int nrsts; + const char * const *reset_names; +}; + +struct uniphier_usb3_reset_priv { + struct clk_bulk_data clk[MAX_CLKS]; + struct reset_control *rst[MAX_RSTS]; + struct reset_simple_data rdata; + const struct uniphier_usb3_reset_soc_data *data; +}; + +static int uniphier_usb3_reset_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct uniphier_usb3_reset_priv *priv; + struct resource *res; + resource_size_t size; + const char *name; + int i, ret, nr; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->data = of_device_get_match_data(dev); + if (WARN_ON(!priv->data || priv->data->nclks > MAX_CLKS || + priv->data->nrsts > MAX_RSTS)) + return -EINVAL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + size = resource_size(res); + priv->rdata.membase = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->rdata.membase)) + return PTR_ERR(priv->rdata.membase); + + for (i = 0; i < priv->data->nclks; i++) + priv->clk[i].id = priv->data->clock_names[i]; + ret = devm_clk_bulk_get(dev, priv->data->nclks, priv->clk); + if (ret) + return ret; + + for (i = 0; i < priv->data->nrsts; i++) { + name = priv->data->reset_names[i]; + priv->rst[i] = devm_reset_control_get_shared(dev, name); + if (IS_ERR(priv->rst[i])) + return PTR_ERR(priv->rst[i]); + } + + ret = clk_bulk_prepare_enable(priv->data->nclks, priv->clk); + if (ret) + return ret; + + for (nr = 0; nr < priv->data->nrsts; nr++) { + ret = reset_control_deassert(priv->rst[nr]); + if (ret) + goto out_rst_assert; + } + + spin_lock_init(&priv->rdata.lock); + priv->rdata.rcdev.owner = THIS_MODULE; + priv->rdata.rcdev.nr_resets = size * BITS_PER_BYTE; + priv->rdata.rcdev.ops = &reset_simple_ops; + priv->rdata.rcdev.of_node = dev->of_node; + priv->rdata.active_low = true; + + platform_set_drvdata(pdev, priv); + + ret = devm_reset_controller_register(dev, &priv->rdata.rcdev); + if (ret) + goto out_rst_assert; + + return 0; + +out_rst_assert: + while (nr--) + reset_control_assert(priv->rst[nr]); + + clk_bulk_disable_unprepare(priv->data->nclks, priv->clk); + + return ret; +} + +static int uniphier_usb3_reset_remove(struct platform_device *pdev) +{ + struct uniphier_usb3_reset_priv *priv = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < priv->data->nrsts; i++) + reset_control_assert(priv->rst[i]); + + clk_bulk_disable_unprepare(priv->data->nclks, priv->clk); + + return 0; +} + +static const char * const uniphier_pro4_clock_reset_names[] = { + "gio", "link", +}; + +static const struct uniphier_usb3_reset_soc_data uniphier_pro4_data = { + .nclks = ARRAY_SIZE(uniphier_pro4_clock_reset_names), + .clock_names = uniphier_pro4_clock_reset_names, + .nrsts = ARRAY_SIZE(uniphier_pro4_clock_reset_names), + .reset_names = uniphier_pro4_clock_reset_names, +}; + +static const char * const uniphier_pxs2_clock_reset_names[] = { + "link", +}; + +static const struct uniphier_usb3_reset_soc_data uniphier_pxs2_data = { + .nclks = ARRAY_SIZE(uniphier_pxs2_clock_reset_names), + .clock_names = uniphier_pxs2_clock_reset_names, + .nrsts = ARRAY_SIZE(uniphier_pxs2_clock_reset_names), + .reset_names = uniphier_pxs2_clock_reset_names, +}; + +static const struct of_device_id uniphier_usb3_reset_match[] = { + { + .compatible = "socionext,uniphier-pro4-usb3-reset", + .data = &uniphier_pro4_data, + }, + { + .compatible = "socionext,uniphier-pxs2-usb3-reset", + .data = &uniphier_pxs2_data, + }, + { + .compatible = "socionext,uniphier-ld20-usb3-reset", + .data = &uniphier_pxs2_data, + }, + { + .compatible = "socionext,uniphier-pxs3-usb3-reset", + .data = &uniphier_pxs2_data, + }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, uniphier_usb3_reset_match); + +static struct platform_driver uniphier_usb3_reset_driver = { + .probe = uniphier_usb3_reset_probe, + .remove = uniphier_usb3_reset_remove, + .driver = { + .name = "uniphier-usb3-reset", + .of_match_table = uniphier_usb3_reset_match, + }, +}; +module_platform_driver(uniphier_usb3_reset_driver); + +MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>"); +MODULE_DESCRIPTION("UniPhier USB3 Reset Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/reset/reset-uniphier.c b/drivers/reset/reset-uniphier.c index e9030ff1bf2f..5605745663ae 100644 --- a/drivers/reset/reset-uniphier.c +++ b/drivers/reset/reset-uniphier.c @@ -202,6 +202,12 @@ static const struct uniphier_reset_data uniphier_pro5_sd_reset_data[] = { #define UNIPHIER_PERI_RESET_FI2C(id, ch) \ UNIPHIER_RESETX((id), 0x114, 24 + (ch)) +#define UNIPHIER_PERI_RESET_SCSSI(id) \ + UNIPHIER_RESETX((id), 0x110, 17) + +#define UNIPHIER_PERI_RESET_MCSSI(id) \ + UNIPHIER_RESETX((id), 0x114, 14) + static const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = { UNIPHIER_PERI_RESET_UART(0, 0), UNIPHIER_PERI_RESET_UART(1, 1), @@ -212,6 +218,7 @@ static const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = { UNIPHIER_PERI_RESET_I2C(6, 2), UNIPHIER_PERI_RESET_I2C(7, 3), UNIPHIER_PERI_RESET_I2C(8, 4), + UNIPHIER_PERI_RESET_SCSSI(11), UNIPHIER_RESET_END, }; @@ -227,6 +234,8 @@ static const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = { UNIPHIER_PERI_RESET_FI2C(8, 4), UNIPHIER_PERI_RESET_FI2C(9, 5), UNIPHIER_PERI_RESET_FI2C(10, 6), + UNIPHIER_PERI_RESET_SCSSI(11), + UNIPHIER_PERI_RESET_MCSSI(12), UNIPHIER_RESET_END, }; |