remoteproc: st_slim_rproc: add a slimcore rproc driver (bb6869b2) · Commits · 戴 / test

drivers/remoteproc/Kconfig

+5 −2

Original line number	Diff line number	Diff line
		@@ -58,7 +58,6 @@ config DA8XX_REMOTEPROC
		tristate "DA8xx/OMAP-L13x remoteproc support"
		depends on ARCH_DAVINCI_DA8XX
		select CMA if MMU
		select REMOTEPROC
		select RPMSG_VIRTIO
		help
		Say y here to support DA8xx/OMAP-L13x remote processors via the
		@@ -99,10 +98,10 @@ config QCOM_WCNSS_PIL
		tristate "Qualcomm WCNSS Peripheral Image Loader"
		depends on OF && ARCH_QCOM
		depends on QCOM_SMEM
		depends on REMOTEPROC
		select QCOM_MDT_LOADER
		select QCOM_SCM
		select QCOM_WCNSS_IRIS
		select REMOTEPROC
		help
		Say y here to support the Peripheral Image Loader for the Qualcomm
		Wireless Connectivity Subsystem.
		@@ -116,4 +115,8 @@ config ST_REMOTEPROC
		processor framework.
		This can be either built-in or a loadable module.

		config ST_SLIM_REMOTEPROC
		tristate
		select REMOTEPROC

		endmenu

drivers/remoteproc/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -16,3 +16,4 @@ obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
		obj-$(CONFIG_QCOM_WCNSS_IRIS) += qcom_wcnss_iris.o
		obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o
		obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
		obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o

drivers/remoteproc/st_slim_rproc.c

0 → 100644

+364 −0

Original line number	Diff line number	Diff line
		/*
		* SLIM core rproc driver
		*
		* Copyright (C) 2016 STMicroelectronics
		*
		* Author: Peter Griffin <peter.griffin@linaro.org>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*/

		#include <linux/clk.h>
		#include <linux/err.h>
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/of_device.h>
		#include <linux/platform_device.h>
		#include <linux/remoteproc.h>
		#include <linux/remoteproc/st_slim_rproc.h>
		#include "remoteproc_internal.h"

		/* SLIM core registers */
		#define SLIM_ID_OFST 0x0
		#define SLIM_VER_OFST 0x4

		#define SLIM_EN_OFST 0x8
		#define SLIM_EN_RUN BIT(0)

		#define SLIM_CLK_GATE_OFST 0xC
		#define SLIM_CLK_GATE_DIS BIT(0)
		#define SLIM_CLK_GATE_RESET BIT(2)

		#define SLIM_SLIM_PC_OFST 0x20

		/* DMEM registers */
		#define SLIM_REV_ID_OFST 0x0
		#define SLIM_REV_ID_MIN_MASK GENMASK(15, 8)
		#define SLIM_REV_ID_MIN(id) ((id & SLIM_REV_ID_MIN_MASK) >> 8)
		#define SLIM_REV_ID_MAJ_MASK GENMASK(23, 16)
		#define SLIM_REV_ID_MAJ(id) ((id & SLIM_REV_ID_MAJ_MASK) >> 16)


		/* peripherals registers */
		#define SLIM_STBUS_SYNC_OFST 0xF88
		#define SLIM_STBUS_SYNC_DIS BIT(0)

		#define SLIM_INT_SET_OFST 0xFD4
		#define SLIM_INT_CLR_OFST 0xFD8
		#define SLIM_INT_MASK_OFST 0xFDC

		#define SLIM_CMD_CLR_OFST 0xFC8
		#define SLIM_CMD_MASK_OFST 0xFCC

		static const char *mem_names[ST_SLIM_MEM_MAX] = {
		[ST_SLIM_DMEM] = "dmem",
		[ST_SLIM_IMEM] = "imem",
		};

		static int slim_clk_get(struct st_slim_rproc slim_rproc, struct device dev)
		{
		int clk, err;

		for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
		if (IS_ERR(slim_rproc->clks[clk])) {
		err = PTR_ERR(slim_rproc->clks[clk]);
		if (err == -EPROBE_DEFER)
		goto err_put_clks;
		slim_rproc->clks[clk] = NULL;
		break;
		}
		}

		return 0;

		err_put_clks:
		while (--clk >= 0)
		clk_put(slim_rproc->clks[clk]);

		return err;
		}

		static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
		{
		int clk;

		for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
		clk_disable_unprepare(slim_rproc->clks[clk]);
		}

		static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
		{
		int clk, ret;

		for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
		ret = clk_prepare_enable(slim_rproc->clks[clk]);
		if (ret)
		goto err_disable_clks;
		}

		return 0;

		err_disable_clks:
		while (--clk >= 0)
		clk_disable_unprepare(slim_rproc->clks[clk]);

		return ret;
		}

		/*
		* Remoteproc slim specific device handlers
		*/
		static int slim_rproc_start(struct rproc *rproc)
		{
		struct device *dev = &rproc->dev;
		struct st_slim_rproc *slim_rproc = rproc->priv;
		unsigned long hw_id, hw_ver, fw_rev;
		u32 val;

		/* disable CPU pipeline clock & reset CPU pipeline */
		val = SLIM_CLK_GATE_DIS \| SLIM_CLK_GATE_RESET;
		writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

		/* disable SLIM core STBus sync */
		writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);

		/* enable cpu pipeline clock */
		writel(!SLIM_CLK_GATE_DIS,
		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

		/* clear int & cmd mailbox */
		writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
		writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);

		/* enable all channels cmd & int */
		writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
		writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);

		/* enable cpu */
		writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

		hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
		hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);

		fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
		SLIM_REV_ID_OFST);

		dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
		SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
		hw_id, hw_ver);

		return 0;
		}

		static int slim_rproc_stop(struct rproc *rproc)
		{
		struct st_slim_rproc *slim_rproc = rproc->priv;
		u32 val;

		/* mask all (cmd & int) channels */
		writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
		writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);

		/* disable cpu pipeline clock */
		writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);

		writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

		val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
		if (val & SLIM_EN_RUN)
		dev_warn(&rproc->dev, "Failed to disable SLIM");

		dev_dbg(&rproc->dev, "slim stopped\n");

		return 0;
		}

		static void slim_rproc_da_to_va(struct rproc rproc, u64 da, int len)
		{
		struct st_slim_rproc *slim_rproc = rproc->priv;
		void *va = NULL;
		int i;

		for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
		if (da != slim_rproc->mem[i].bus_addr)
		continue;

		if (len <= slim_rproc->mem[i].size) {
		/* __force to make sparse happy with type conversion */
		va = (__force void *)slim_rproc->mem[i].cpu_addr;
		break;
		}
		}

		dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);

		return va;
		}

		static struct rproc_ops slim_rproc_ops = {
		.start = slim_rproc_start,
		.stop = slim_rproc_stop,
		.da_to_va = slim_rproc_da_to_va,
		};

		/*
		* Firmware handler operations: sanity, boot address, load ...
		*/

		static struct resource_table empty_rsc_tbl = {
		.ver = 1,
		.num = 0,
		};

		static struct resource_table slim_rproc_find_rsc_table(struct rproc rproc,
		const struct firmware *fw,
		int *tablesz)
		{
		*tablesz = sizeof(empty_rsc_tbl);
		return &empty_rsc_tbl;
		}

		static struct rproc_fw_ops slim_rproc_fw_ops = {
		.find_rsc_table = slim_rproc_find_rsc_table,
		};

		/**
		* st_slim_rproc_alloc() - allocate and initialise slim rproc
		* @pdev: Pointer to the platform_device struct
		* @fw_name: Name of firmware for rproc to use
		*
		* Function for allocating and initialising a slim rproc for use by
		* device drivers whose IP is based around the SLIM core. It
		* obtains and enables any clocks required by the SLIM core and also
		* ioremaps the various IO.
		*
		* Returns st_slim_rproc pointer or PTR_ERR() on error.
		*/

		struct st_slim_rproc st_slim_rproc_alloc(struct platform_device pdev,
		char *fw_name)
		{
		struct device *dev = &pdev->dev;
		struct st_slim_rproc *slim_rproc;
		struct device_node *np = dev->of_node;
		struct rproc *rproc;
		struct resource *res;
		int err, i;
		const struct rproc_fw_ops *elf_ops;

		if (!fw_name)
		return ERR_PTR(-EINVAL);

		if (!of_device_is_compatible(np, "st,slim-rproc"))
		return ERR_PTR(-EINVAL);

		rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
		fw_name, sizeof(*slim_rproc));
		if (!rproc)
		return ERR_PTR(-ENOMEM);

		rproc->has_iommu = false;

		slim_rproc = rproc->priv;
		slim_rproc->rproc = rproc;

		elf_ops = rproc->fw_ops;
		/* Use some generic elf ops */
		slim_rproc_fw_ops.load = elf_ops->load;
		slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;

		rproc->fw_ops = &slim_rproc_fw_ops;

		/* get imem and dmem */
		for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
		mem_names[i]);

		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
		dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
		err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
		goto err;
		}
		slim_rproc->mem[i].bus_addr = res->start;
		slim_rproc->mem[i].size = resource_size(res);
		}

		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
		slim_rproc->slimcore = devm_ioremap_resource(dev, res);
		if (IS_ERR(slim_rproc->slimcore)) {
		dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
		err = PTR_ERR(slim_rproc->slimcore);
		goto err;
		}

		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
		slim_rproc->peri = devm_ioremap_resource(dev, res);
		if (IS_ERR(slim_rproc->peri)) {
		dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
		err = PTR_ERR(slim_rproc->peri);
		goto err;
		}

		err = slim_clk_get(slim_rproc, dev);
		if (err)
		goto err;

		err = slim_clk_enable(slim_rproc);
		if (err) {
		dev_err(dev, "Failed to enable clocks\n");
		goto err_clk_put;
		}

		/* Register as a remoteproc device */
		err = rproc_add(rproc);
		if (err) {
		dev_err(dev, "registration of slim remoteproc failed\n");
		goto err_clk_dis;
		}

		return slim_rproc;

		err_clk_dis:
		slim_clk_disable(slim_rproc);
		err_clk_put:
		for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
		clk_put(slim_rproc->clks[i]);
		err:
		rproc_put(rproc);
		return ERR_PTR(err);
		}
		EXPORT_SYMBOL(st_slim_rproc_alloc);

		/**
		* st_slim_rproc_put() - put slim rproc resources
		* @slim_rproc: Pointer to the st_slim_rproc struct
		*
		* Function for calling respective _put() functions on slim_rproc resources.
		*
		*/
		void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
		{
		int clk;

		if (!slim_rproc)
		return;

		slim_clk_disable(slim_rproc);

		for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
		clk_put(slim_rproc->clks[clk]);

		rproc_del(slim_rproc->rproc);
		rproc_put(slim_rproc->rproc);
		}
		EXPORT_SYMBOL(st_slim_rproc_put);

		MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
		MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
		MODULE_LICENSE("GPL v2");

include/linux/remoteproc/st_slim_rproc.h

0 → 100644

+58 −0

Original line number	Diff line number	Diff line
		/*
		* SLIM core rproc driver header
		*
		* Copyright (C) 2016 STMicroelectronics
		*
		* Author: Peter Griffin <peter.griffin@linaro.org>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*/
		#ifndef _ST_REMOTEPROC_SLIM_H
		#define _ST_REMOTEPROC_SLIM_H

		#define ST_SLIM_MEM_MAX 2
		#define ST_SLIM_MAX_CLK 4

		enum {
		ST_SLIM_DMEM,
		ST_SLIM_IMEM,
		};

		/**
		* struct st_slim_mem - slim internal memory structure
		* @cpu_addr: MPU virtual address of the memory region
		* @bus_addr: Bus address used to access the memory region
		* @size: Size of the memory region
		*/
		struct st_slim_mem {
		void __iomem *cpu_addr;
		phys_addr_t bus_addr;
		size_t size;
		};

		/**
		* struct st_slim_rproc - SLIM slim core
		* @rproc: rproc handle
		* @mem: slim memory information
		* @slimcore: slim slimcore regs
		* @peri: slim peripheral regs
		* @clks: slim clocks
		*/
		struct st_slim_rproc {
		struct rproc *rproc;
		struct st_slim_mem mem[ST_SLIM_MEM_MAX];
		void __iomem *slimcore;
		void __iomem *peri;

		/* st_slim_rproc private */
		struct clk *clks[ST_SLIM_MAX_CLK];
		};

		struct st_slim_rproc st_slim_rproc_alloc(struct platform_device pdev,
		char *fw_name);
		void st_slim_rproc_put(struct st_slim_rproc *slim_rproc);

		#endif

Admin message