remoteproc: meson-mx-ao-arc: Add a driver for the AO ARC remote procesor (553dd3b8) · Commits · 戴 / test

drivers/remoteproc/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -125,6 +125,16 @@ config KEYSTONE_REMOTEPROC
		It's safe to say N here if you're not interested in the Keystone
		DSPs or just want to use a bare minimum kernel.

		config MESON_MX_AO_ARC_REMOTEPROC
		tristate "Amlogic Meson6/8/8b/8m2 AO ARC remote processor support"
		depends on HAS_IOMEM
		depends on (ARM && ARCH_MESON) \|\| COMPILE_TEST
		help
		Say m or y here to have support for the AO ARC remote processor
		on Amlogic Meson6/Meson8/Meson8b/Meson8m2 SoCs. This is
		typically used for system suspend.
		If unusre say N.

		config PRU_REMOTEPROC
		tristate "TI PRU remoteproc support"
		depends on TI_PRUSS

drivers/remoteproc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@ obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
		obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o
		obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o
		obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o
		obj-$(CONFIG_MESON_MX_AO_ARC_REMOTEPROC)+= meson_mx_ao_arc.o
		obj-$(CONFIG_PRU_REMOTEPROC) += pru_rproc.o
		obj-$(CONFIG_QCOM_PIL_INFO) += qcom_pil_info.o
		obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o

drivers/remoteproc/meson_mx_ao_arc.c

0 → 100644

+234 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later
		/*
		* Copyright (C) 2020 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
		*/

		#include <linux/bitfield.h>
		#include <linux/bitops.h>
		#include <linux/delay.h>
		#include <linux/genalloc.h>
		#include <linux/io.h>
		#include <linux/ioport.h>
		#include <linux/module.h>
		#include <linux/of_address.h>
		#include <linux/of_platform.h>
		#include <linux/platform_device.h>
		#include <linux/regmap.h>
		#include <linux/remoteproc.h>
		#include <linux/reset.h>
		#include <linux/sizes.h>

		#include "remoteproc_internal.h"

		#define AO_REMAP_REG0 0x0
		#define AO_REMAP_REG1 0x4

		#define AO_CPU_CNTL 0x0
		#define AO_CPU_CNTL_MEM_ADDR_UPPER GENMASK(31, 16)
		#define AO_CPU_CNTL_HALT BIT(9)
		#define AO_CPU_CNTL_UNKNONWN BIT(8)
		#define AO_CPU_CNTL_RUN BIT(0)

		#define AO_CPU_STAT 0x4

		#define AO_SECURE_REG0 0x0
		#define AO_SECURE_REG0_UNKNOWN GENMASK(23, 8)

		#define MESON_AO_RPROC_SRAM_SIZE SZ_32K
		#define MESON_AO_RPROC_SRAM_UNUSABLE_BITS GENMASK(19, 0)
		#define MESON_AO_RPROC_MEMORY_OFFSET 0x10000000

		struct meson_mx_ao_arc_rproc_priv {
		void __iomem *remap_base;
		void __iomem *cpu_base;
		unsigned long sram_va;
		phys_addr_t sram_pa;
		struct gen_pool *sram_pool;
		struct reset_control *arc625_reset;
		struct regmap *secbus2_regmap;
		};

		static int meson_mx_ao_arc_rproc_start(struct rproc *rproc)
		{
		struct meson_mx_ao_arc_rproc_priv *priv = rproc->priv;
		phys_addr_t phys_addr;
		int ret;

		phys_addr = priv->sram_pa - MESON_AO_RPROC_MEMORY_OFFSET;

		writel(rproc->bootaddr, priv->remap_base + AO_REMAP_REG0);
		usleep_range(10, 100);

		regmap_update_bits(priv->secbus2_regmap, AO_SECURE_REG0,
		AO_SECURE_REG0_UNKNOWN, 0);

		ret = reset_control_reset(priv->arc625_reset);
		if (ret)
		return ret;

		usleep_range(10, 100);

		writel(FIELD_PREP(AO_CPU_CNTL_MEM_ADDR_UPPER, phys_addr >> 20) \|
		AO_CPU_CNTL_UNKNONWN \| AO_CPU_CNTL_RUN,
		priv->cpu_base + AO_CPU_CNTL);
		usleep_range(20, 200);

		return 0;
		}

		static int meson_mx_ao_arc_rproc_stop(struct rproc *rproc)
		{
		struct meson_mx_ao_arc_rproc_priv *priv = rproc->priv;

		writel(AO_CPU_CNTL_HALT, priv->cpu_base + AO_CPU_CNTL);

		return 0;
		}

		static void* meson_mx_ao_arc_rproc_da_to_va(struct rproc *rproc, u64 da,
		size_t len)
		{
		struct meson_mx_ao_arc_rproc_priv *priv = rproc->priv;

		if ((da + len) >= MESON_AO_RPROC_SRAM_SIZE)
		return NULL;

		return (void*)priv->sram_va + da;
		}

		static struct rproc_ops meson_mx_ao_arc_rproc_ops = {
		.start = meson_mx_ao_arc_rproc_start,
		.stop = meson_mx_ao_arc_rproc_stop,
		.da_to_va = meson_mx_ao_arc_rproc_da_to_va,
		.get_boot_addr = rproc_elf_get_boot_addr,
		.load = rproc_elf_load_segments,
		.sanity_check = rproc_elf_sanity_check,
		};

		static int meson_mx_ao_arc_rproc_probe(struct platform_device *pdev)
		{
		struct meson_mx_ao_arc_rproc_priv *priv;
		struct platform_device *secbus2_pdev;
		struct device *dev = &pdev->dev;
		struct device_node *np;
		const char *fw_name;
		struct rproc *rproc;
		int ret;

		ret = of_property_read_string(dev->of_node, "firmware-name", &fw_name);
		if (ret)
		fw_name = NULL;

		rproc = rproc_alloc(dev, "meson-mx-ao-arc", &meson_mx_ao_arc_rproc_ops,
		fw_name, sizeof(*priv));
		if (!rproc)
		return -ENOMEM;

		rproc->has_iommu = false;
		priv = rproc->priv;

		priv->sram_pool = of_gen_pool_get(dev->of_node, "amlogic,sram", 0);
		if (!priv->sram_pool) {
		dev_err(dev, "Could not get amlogic,sram pool\n");
		ret = -ENODEV;
		goto err_free_rproc;
		}

		priv->sram_va = gen_pool_alloc(priv->sram_pool,
		MESON_AO_RPROC_SRAM_SIZE);
		if (!priv->sram_va) {
		dev_err(dev, "Could not alloc memory in SRAM pool\n");
		ret = -ENOMEM;
		goto err_free_rproc;
		}

		priv->sram_pa = gen_pool_virt_to_phys(priv->sram_pool, priv->sram_va);
		if (priv->sram_pa & MESON_AO_RPROC_SRAM_UNUSABLE_BITS) {
		dev_err(dev, "SRAM address contains unusable bits\n");
		ret = -EINVAL;
		goto err_free_genpool;
		}

		np = of_parse_phandle(dev->of_node, "amlogic,secbus2", 0);
		secbus2_pdev = of_find_device_by_node(np);
		of_node_put(np);

		if (!secbus2_pdev) {
		dev_err(dev, "Failed to find amlogic,secbus2 device\n");
		ret = -ENODEV;
		goto err_free_genpool;
		}

		priv->secbus2_regmap = dev_get_regmap(&secbus2_pdev->dev, NULL);
		if (!priv->secbus2_regmap) {
		dev_err(dev, "Failed to find SECBUS2 regmap\n");
		ret = -ENODEV;
		goto err_free_genpool;
		}

		priv->remap_base = devm_platform_ioremap_resource_byname(pdev, "remap");
		if (IS_ERR(priv->remap_base)) {
		ret = PTR_ERR(priv->remap_base);
		goto err_free_genpool;
		}

		priv->cpu_base = devm_platform_ioremap_resource_byname(pdev, "cpu");
		if (IS_ERR(priv->cpu_base)) {
		ret = PTR_ERR(priv->cpu_base);
		goto err_free_genpool;
		}

		priv->arc625_reset = devm_reset_control_get_exclusive(dev, NULL);
		if (IS_ERR(priv->arc625_reset)) {
		dev_err(dev, "Failed to get ARC625 reset\n");
		ret = PTR_ERR(priv->arc625_reset);
		goto err_free_genpool;
		}

		platform_set_drvdata(pdev, rproc);

		ret = rproc_add(rproc);
		if (ret)
		goto err_free_genpool;

		return 0;

		err_free_genpool:
		gen_pool_free(priv->sram_pool, priv->sram_va,
		MESON_AO_RPROC_SRAM_SIZE);
		err_free_rproc:
		rproc_free(rproc);
		return ret;
		}

		static int meson_mx_ao_arc_rproc_remove(struct platform_device *pdev)
		{
		struct rproc *rproc = platform_get_drvdata(pdev);
		struct meson_mx_ao_arc_rproc_priv *priv = rproc->priv;

		gen_pool_free(priv->sram_pool, priv->sram_va,
		MESON_AO_RPROC_SRAM_SIZE);
		rproc_free(rproc);

		return 0;
		}

		static const struct of_device_id meson_mx_ao_arc_rproc_match[] = {
		{ .compatible = "amlogic,meson-mx-ao-arc-rproc" },
		{ /* sentinel */ }
		};
		MODULE_DEVICE_TABLE(of, meson_mx_ao_arc_rproc_match);

		static struct platform_driver meson_mx_ao_arc_rproc_driver = {
		.probe = meson_mx_ao_arc_rproc_probe,
		.remove = meson_mx_ao_arc_rproc_remove,
		.driver = {
		.name = "meson-mx-ao-arc-rproc",
		.of_match_table = of_match_ptr(meson_mx_ao_arc_rproc_match),
		},
		};
		module_platform_driver(meson_mx_ao_arc_rproc_driver);

		MODULE_DESCRIPTION("Amlogic Meson6/8/8b/8m2 AO ARC remote processor driver");
		MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@googlemail.com>");
		MODULE_LICENSE("GPL v2");

Admin message