remoteproc: ingenic: Added remoteproc driver (48f0a1bb) · Commits · EulixOS / Software / Kernel

drivers/remoteproc/Kconfig

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		@@ -23,6 +23,15 @@ config IMX_REMOTEPROC

		It's safe to say N here.

		config INGENIC_VPU_RPROC
		tristate "Ingenic JZ47xx VPU remoteproc support"
		depends on MIPS \|\| COMPILE_TEST
		help
		Say y or m here to support the VPU in the JZ47xx SoCs from Ingenic.

		This can be either built-in or a loadable module.
		If unsure say N.

		config MTK_SCP
		tristate "Mediatek SCP support"
		depends on ARCH_MEDIATEK

drivers/remoteproc/Makefile

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		@@ -10,6 +10,7 @@ remoteproc-y += remoteproc_sysfs.o
		remoteproc-y += remoteproc_virtio.o
		remoteproc-y += remoteproc_elf_loader.o
		obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o
		obj-$(CONFIG_INGENIC_VPU_RPROC) += ingenic_rproc.o
		obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o
		obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o
		obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o

drivers/remoteproc/ingenic_rproc.c

0 → 100644

+280 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0+
		/*
		* Ingenic JZ47xx remoteproc driver
		* Copyright 2019, Paul Cercueil <paul@crapouillou.net>
		*/

		#include <linux/bitops.h>
		#include <linux/clk.h>
		#include <linux/err.h>
		#include <linux/interrupt.h>
		#include <linux/io.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/pm_runtime.h>
		#include <linux/remoteproc.h>

		#include "remoteproc_internal.h"

		#define REG_AUX_CTRL 0x0
		#define REG_AUX_MSG_ACK 0x10
		#define REG_AUX_MSG 0x14
		#define REG_CORE_MSG_ACK 0x18
		#define REG_CORE_MSG 0x1C

		#define AUX_CTRL_SLEEP BIT(31)
		#define AUX_CTRL_MSG_IRQ_EN BIT(3)
		#define AUX_CTRL_NMI_RESETS BIT(2)
		#define AUX_CTRL_NMI BIT(1)
		#define AUX_CTRL_SW_RESET BIT(0)

		struct vpu_mem_map {
		const char *name;
		unsigned int da;
		};

		struct vpu_mem_info {
		const struct vpu_mem_map *map;
		unsigned long len;
		void __iomem *base;
		};

		static const struct vpu_mem_map vpu_mem_map[] = {
		{ "tcsm0", 0x132b0000 },
		{ "tcsm1", 0xf4000000 },
		{ "sram", 0x132f0000 },
		};

		/**
		* struct vpu - Ingenic VPU remoteproc private structure
		* @irq: interrupt number
		* @clks: pointers to the VPU and AUX clocks
		* @aux_base: raw pointer to the AUX interface registers
		* @mem_info: array of struct vpu_mem_info, which contain the mapping info of
		* each of the external memories
		* @dev: private pointer to the device
		*/
		struct vpu {
		int irq;
		struct clk_bulk_data clks[2];
		void __iomem *aux_base;
		struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
		struct device *dev;
		};

		static int ingenic_rproc_start(struct rproc *rproc)
		{
		struct vpu *vpu = rproc->priv;
		u32 ctrl;

		enable_irq(vpu->irq);

		/* Reset the AUX and enable message IRQ */
		ctrl = AUX_CTRL_NMI_RESETS \| AUX_CTRL_NMI \| AUX_CTRL_MSG_IRQ_EN;
		writel(ctrl, vpu->aux_base + REG_AUX_CTRL);

		return 0;
		}

		static int ingenic_rproc_stop(struct rproc *rproc)
		{
		struct vpu *vpu = rproc->priv;

		disable_irq(vpu->irq);

		/* Keep AUX in reset mode */
		writel(AUX_CTRL_SW_RESET, vpu->aux_base + REG_AUX_CTRL);

		return 0;
		}

		static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
		{
		struct vpu *vpu = rproc->priv;

		writel(vqid, vpu->aux_base + REG_CORE_MSG);
		}

		static void ingenic_rproc_da_to_va(struct rproc rproc, u64 da, size_t len)
		{
		struct vpu *vpu = rproc->priv;
		void __iomem *va = NULL;
		unsigned int i;

		for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
		const struct vpu_mem_info *info = &vpu->mem_info[i];
		const struct vpu_mem_map *map = info->map;

		if (da >= map->da && (da + len) < (map->da + info->len)) {
		va = info->base + (da - map->da);
		break;
		}
		}

		return (__force void *)va;
		}

		static struct rproc_ops ingenic_rproc_ops = {
		.start = ingenic_rproc_start,
		.stop = ingenic_rproc_stop,
		.kick = ingenic_rproc_kick,
		.da_to_va = ingenic_rproc_da_to_va,
		};

		static irqreturn_t vpu_interrupt(int irq, void *data)
		{
		struct rproc *rproc = data;
		struct vpu *vpu = rproc->priv;
		u32 vring;

		vring = readl(vpu->aux_base + REG_AUX_MSG);

		/* Ack the interrupt */
		writel(0, vpu->aux_base + REG_AUX_MSG_ACK);

		return rproc_vq_interrupt(rproc, vring);
		}

		static void ingenic_rproc_disable_clks(void *data)
		{
		struct vpu *vpu = data;

		pm_runtime_resume(vpu->dev);
		pm_runtime_disable(vpu->dev);

		clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
		}

		static int ingenic_rproc_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct resource *mem;
		struct rproc *rproc;
		struct vpu *vpu;
		unsigned int i;
		int ret;

		rproc = devm_rproc_alloc(dev, "ingenic-vpu",
		&ingenic_rproc_ops, NULL, sizeof(*vpu));
		if (!rproc)
		return -ENOMEM;

		vpu = rproc->priv;
		vpu->dev = &pdev->dev;
		platform_set_drvdata(pdev, vpu);

		mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aux");
		vpu->aux_base = devm_ioremap_resource(dev, mem);
		if (IS_ERR(vpu->aux_base)) {
		dev_err(dev, "Failed to ioremap\n");
		return PTR_ERR(vpu->aux_base);
		}

		for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
		mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
		vpu_mem_map[i].name);

		vpu->mem_info[i].base = devm_ioremap_resource(dev, mem);
		if (IS_ERR(vpu->mem_info[i].base)) {
		ret = PTR_ERR(vpu->mem_info[i].base);
		dev_err(dev, "Failed to ioremap\n");
		return ret;
		}

		vpu->mem_info[i].len = resource_size(mem);
		vpu->mem_info[i].map = &vpu_mem_map[i];
		}

		vpu->clks[0].id = "vpu";
		vpu->clks[1].id = "aux";

		ret = devm_clk_bulk_get(dev, ARRAY_SIZE(vpu->clks), vpu->clks);
		if (ret) {
		dev_err(dev, "Failed to get clocks\n");
		return ret;
		}

		vpu->irq = platform_get_irq(pdev, 0);
		if (vpu->irq < 0)
		return vpu->irq;

		ret = devm_request_irq(dev, vpu->irq, vpu_interrupt, 0, "VPU", rproc);
		if (ret < 0) {
		dev_err(dev, "Failed to request IRQ\n");
		return ret;
		}

		disable_irq(vpu->irq);

		/* The clocks must be enabled for the firmware to be loaded in TCSM */
		ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
		if (ret) {
		dev_err(dev, "Unable to start clocks\n");
		return ret;
		}

		pm_runtime_irq_safe(dev);
		pm_runtime_set_active(dev);
		pm_runtime_enable(dev);
		pm_runtime_get_sync(dev);
		pm_runtime_use_autosuspend(dev);

		ret = devm_add_action_or_reset(dev, ingenic_rproc_disable_clks, vpu);
		if (ret) {
		dev_err(dev, "Unable to register action\n");
		goto out_pm_put;
		}

		ret = devm_rproc_add(dev, rproc);
		if (ret) {
		dev_err(dev, "Failed to register remote processor\n");
		goto out_pm_put;
		}

		out_pm_put:
		pm_runtime_put_autosuspend(dev);

		return ret;
		}

		static const struct of_device_id ingenic_rproc_of_matches[] = {
		{ .compatible = "ingenic,jz4770-vpu-rproc", },
		{}
		};
		MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);

		static int __maybe_unused ingenic_rproc_suspend(struct device *dev)
		{
		struct vpu *vpu = dev_get_drvdata(dev);

		clk_bulk_disable(ARRAY_SIZE(vpu->clks), vpu->clks);

		return 0;
		}

		static int __maybe_unused ingenic_rproc_resume(struct device *dev)
		{
		struct vpu *vpu = dev_get_drvdata(dev);

		return clk_bulk_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
		}

		static const struct dev_pm_ops __maybe_unused ingenic_rproc_pm = {
		SET_RUNTIME_PM_OPS(ingenic_rproc_suspend, ingenic_rproc_resume, NULL)
		};

		static struct platform_driver ingenic_rproc_driver = {
		.probe = ingenic_rproc_probe,
		.driver = {
		.name = "ingenic-vpu",
		#ifdef CONFIG_PM
		.pm = &ingenic_rproc_pm,
		#endif
		.of_match_table = ingenic_rproc_of_matches,
		},
		};
		module_platform_driver(ingenic_rproc_driver);

		MODULE_LICENSE("GPL");
		MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
		MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");