From patchwork Fri Apr 17 17:00:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 11495713 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3F89A92C for ; Fri, 17 Apr 2020 17:01:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 22B5D2078E for ; Fri, 17 Apr 2020 17:01:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=crapouillou.net header.i=@crapouillou.net header.b="nkQoFYG9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728326AbgDQRBK (ORCPT ); Fri, 17 Apr 2020 13:01:10 -0400 Received: from outils.crapouillou.net ([89.234.176.41]:52856 "EHLO crapouillou.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728320AbgDQRBK (ORCPT ); Fri, 17 Apr 2020 13:01:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1587142847; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=g+g22N0vX9HZAWIsG8QfXwziyOsyFFlyylFV+RzsNaQ=; b=nkQoFYG9OgHNHs3os5LNKWJ644YoXNpmW3UDfg78nbICDHELZjzPT7CVf2Y16KTJrV7DbW 1Jx+EB4CMFCCBqnjeYu0XmkM8bliAEhynrCQmo/0yUCFW0fvm3830/FmUpq87DcqQ1bCnA nvi0kO1Ki2H5jaE4XwAiuEKZRvU8WO0= From: Paul Cercueil To: Ohad Ben-Cohen , Bjorn Andersson , Arnaud Pouliquen Cc: od@zcrc.me, linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Cercueil , kbuild test robot , Julia Lawall , Mathieu Poirier Subject: [PATCH v6 4/5] remoteproc: ingenic: Added remoteproc driver Date: Fri, 17 Apr 2020 19:00:39 +0200 Message-Id: <20200417170040.174319-4-paul@crapouillou.net> In-Reply-To: <20200417170040.174319-1-paul@crapouillou.net> References: <20200417170040.174319-1-paul@crapouillou.net> MIME-Version: 1.0 Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org This driver is used to boot, communicate with and load firmwares to the MIPS co-processor found in the VPU hardware of the JZ47xx SoCs from Ingenic. Signed-off-by: Paul Cercueil Signed-off-by: kbuild test robot Signed-off-by: Julia Lawall Acked-by: Mathieu Poirier --- Notes: v2: Remove exception for always-mapped memories v3: - Use clk_bulk API - Move device-managed code to its own patch [3/4] - Move devicetree table right above ingenic_rproc_driver - Removed #ifdef CONFIG_OF around devicetree table - Removed .owner = THIS_MODULE in ingenic_rproc_driver - Removed useless platform_set_drvdata() v4: - Add fix reported by Julia - Change Kconfig symbol to INGENIC_VPU_RPROC - Add documentation to struct vpu - disable_irq_nosync() -> disable_irq() v5: No change v6: Instead of prepare/unprepare callbacks, use PM runtime callbacks drivers/remoteproc/Kconfig | 8 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/ingenic_rproc.c | 282 +++++++++++++++++++++++++++++ 3 files changed, 291 insertions(+) create mode 100644 drivers/remoteproc/ingenic_rproc.c diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index fbaed079b299..31da3e6c6281 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -240,6 +240,14 @@ config STM32_RPROC This can be either built-in or a loadable module. +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. + endif # REMOTEPROC endmenu diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 0effd3825035..e8b886e511f0 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -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 diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c new file mode 100644 index 000000000000..bb14fe1c11f8 --- /dev/null +++ b/drivers/remoteproc/ingenic_rproc.c @@ -0,0 +1,282 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Ingenic JZ47xx remoteproc driver + * Copyright 2019, Paul Cercueil + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 + * @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; + + if (len <= 0) + return NULL; + + 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"); + 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"); + 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"); + 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"); + 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"); + 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"); + goto out_pm_put; + } + + ret = devm_rproc_add(dev, rproc); + if (ret) { + dev_err(dev, "Failed to register remote processor"); + 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 = of_match_ptr(ingenic_rproc_of_matches), + }, +}; +module_platform_driver(ingenic_rproc_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Paul Cercueil "); +MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");