Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753967AbdGJOmt (ORCPT ); Mon, 10 Jul 2017 10:42:49 -0400 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:38965 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752677AbdGJOmo (ORCPT ); Mon, 10 Jul 2017 10:42:44 -0400 From: Oleksij Rempel To: devicetree@vger.kernel.org, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Mark Rutland , Russell King , Shawn Guo , Fabio Estevam , Ohad Ben-Cohen , Bjorn Andersson , linux-remoteproc@vger.kernel.org, linux@rempel-privat.de Cc: Oleksij Rempel Subject: [PATCH v1 2/2] remoteproc: imx_rproc: add a NXP/Freescale imx_rproc driver Date: Mon, 10 Jul 2017 16:42:20 +0200 Message-Id: <20170710144220.31594-3-o.rempel@pengutronix.de> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170710144220.31594-1-o.rempel@pengutronix.de> References: <20170710144220.31594-1-o.rempel@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: ore@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12961 Lines: 472 Provide a basic driver to control Cortex M4 co-processor found on NXP i.MX7D and i.MX6SX. Currently it is able to resolve addresses between M4 and main CPU, start and stop the co-processor. Other functionality is not provided or test. This driver was tested on NXP i.MX7D and expected to work on i.MX6SX as well. Signed-off-by: Oleksij Rempel --- drivers/remoteproc/Kconfig | 10 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/imx_rproc.c | 417 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 428 insertions(+) create mode 100644 drivers/remoteproc/imx_rproc.c diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index faad69a1a597..1f6644908629 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -13,6 +13,16 @@ config REMOTEPROC if REMOTEPROC +config IMX_REMOTEPROC + tristate "IMX6/7 remoteproc support" + depends on SOC_IMX6SX || SOC_IMX7D + depends on REMOTEPROC + help + Say y here to support iMX's remote processors (Cortex M4 + on iMX7D) via the remote processor framework. + + It's safe to say N here. + config OMAP_REMOTEPROC tristate "OMAP remoteproc support" depends on HAS_DMA diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index ffc5e430df27..d351c25cdb4e 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -19,3 +19,4 @@ qcom_wcnss_pil-y += qcom_wcnss.o qcom_wcnss_pil-y += qcom_wcnss_iris.o obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o +obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c new file mode 100644 index 000000000000..2a5300c3323c --- /dev/null +++ b/drivers/remoteproc/imx_rproc.c @@ -0,0 +1,417 @@ +/* + * Copyright (c) 2017 Pengutronix, Oleksij Rempel + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IMX7D_SRC_SCR 0x0C +#define IMX7D_ENABLE_M4 BIT(3) +#define IMX7D_SW_M4P_RST BIT(2) +#define IMX7D_SW_M4C_RST BIT(1) +#define IMX7D_SW_M4C_NON_SCLR_RST BIT(0) + +#define IMX7D_M4_RST_MASK (IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \ + | IMX7D_SW_M4C_RST \ + | IMX7D_SW_M4C_NON_SCLR_RST) + +#define IMX7D_M4_START (IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \ + | IMX7D_SW_M4C_RST) +#define IMX7D_M4_STOP IMX7D_SW_M4C_NON_SCLR_RST + +/* Address: 0x020D8000 */ +#define IMX6SX_SRC_SCR 0x00 +#define IMX6SX_ENABLE_M4 BIT(22) +#define IMX6SX_SW_M4P_RST BIT(12) +#define IMX6SX_SW_M4C_NON_SCLR_RST BIT(4) +#define IMX6SX_SW_M4C_RST BIT(3) + +#define IMX6SX_M4_START (IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \ + | IMX6SX_SW_M4C_RST) +#define IMX6SX_M4_STOP IMX6SX_SW_M4C_NON_SCLR_RST +#define IMX6SX_M4_RST_MASK (IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \ + | IMX6SX_SW_M4C_NON_SCLR_RST \ + | IMX6SX_SW_M4C_RST) + +#define IMX7D_RPROC_MEM_MAX 8 + +/** + * struct imx_rproc_mem - slim internal memory structure + * @cpu_addr: MPU virtual address of the memory region + * @sys_addr: Bus address used to access the memory region + * @size: Size of the memory region + */ +struct imx_rproc_mem { + void __iomem *cpu_addr; + phys_addr_t sys_addr; + size_t size; +}; + +/* att flags */ +/* M4 own area. Can be mapped at probe */ +#define ATT_OWN BIT(1) + +/* address translation table */ +struct imx_rproc_att { + u32 da; /* device address (From Cortex M4 view)*/ + u32 sa; /* system bus address */ + u32 size; /* size of reg range */ + int flags; +}; + +struct imx_rproc_dcfg { + u32 src_reg; + u32 src_mask; + u32 src_start; + u32 src_stop; + const struct imx_rproc_att *att; + size_t att_size; +}; + +struct imx_rproc { + struct device *dev; + struct regmap *regmap; + struct rproc *rproc; + const struct imx_rproc_dcfg *dcfg; + struct imx_rproc_mem mem[IMX7D_RPROC_MEM_MAX]; + struct clk *clk; +}; + +static const struct imx_rproc_att imx_rproc_att_imx7d[] = { + /* dev addr , sys addr , size , flags */ + /* OCRAM_S (M4 Boot code) - alias */ + { 0x00000000, 0x00180000, 0x00008000, 0 }, + /* OCRAM_S (Code) */ + { 0x00180000, 0x00180000, 0x00008000, ATT_OWN }, + /* OCRAM (Code) - alias */ + { 0x00900000, 0x00900000, 0x00020000, 0 }, + /* OCRAM_EPDC (Code) - alias */ + { 0x00920000, 0x00920000, 0x00020000, 0 }, + /* OCRAM_PXP (Code) - alias */ + { 0x00940000, 0x00940000, 0x00008000, 0 }, + /* TCML (Code) */ + { 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN }, + /* DDR (Code) - alias, first part of DDR (Data) */ + { 0x10000000, 0x80000000, 0x0FFF0000, 0 }, + + /* TCMU (Data) */ + { 0x20000000, 0x00800000, 0x00008000, ATT_OWN }, + /* OCRAM (Data) */ + { 0x20200000, 0x00900000, 0x00020000, 0 }, + /* OCRAM_EPDC (Data) */ + { 0x20220000, 0x00920000, 0x00020000, 0 }, + /* OCRAM_PXP (Data) */ + { 0x20240000, 0x00940000, 0x00008000, 0 }, + /* DDR (Data) */ + { 0x80000000, 0x80000000, 0x60000000, 0 }, +}; + +static const struct imx_rproc_att imx_rproc_att_imx6sx[] = { + /* dev addr , sys addr , size , flags */ + /* TCML (M4 Boot Code) - alias */ + { 0x00000000, 0x007F8000, 0x00008000, 0 }, + /* OCRAM_S (Code) */ + { 0x00180000, 0x008F8000, 0x00004000, 0 }, + /* OCRAM_S (Code) - alias */ + { 0x00180000, 0x008FC000, 0x00004000, 0 }, + /* TCML (Code) */ + { 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN }, + /* DDR (Code) - alias, first part of DDR (Data) */ + { 0x10000000, 0x80000000, 0x0FFF8000, 0 }, + + /* TCMU (Data) */ + { 0x20000000, 0x00800000, 0x00008000, ATT_OWN }, + /* OCRAM_S (Data) - alias? */ + { 0x208F8000, 0x008F8000, 0x00004000, 0 }, + /* DDR (Data) */ + { 0x80000000, 0x80000000, 0x60000000, 0 }, +}; + +static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = { + .src_reg = IMX7D_SRC_SCR, + .src_mask = IMX7D_M4_RST_MASK, + .src_start = IMX7D_M4_START, + .src_stop = IMX7D_M4_STOP, + .att = imx_rproc_att_imx7d, + .att_size = ARRAY_SIZE(imx_rproc_att_imx7d), +}; + +static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = { + .src_reg = IMX6SX_SRC_SCR, + .src_mask = IMX6SX_M4_RST_MASK, + .src_start = IMX6SX_M4_START, + .src_stop = IMX6SX_M4_STOP, + .att = imx_rproc_att_imx6sx, + .att_size = ARRAY_SIZE(imx_rproc_att_imx6sx), +}; + +static int imx_rproc_start(struct rproc *rproc) +{ + struct imx_rproc *priv = rproc->priv; + const struct imx_rproc_dcfg *dcfg = priv->dcfg; + struct device *dev = priv->dev; + int ret; + + ret = regmap_update_bits(priv->regmap, dcfg->src_reg, + dcfg->src_mask, dcfg->src_start); + if (ret) + dev_err(dev, "Filed to enable M4!\n"); + + return ret; +} + +static int imx_rproc_stop(struct rproc *rproc) +{ + struct imx_rproc *priv = rproc->priv; + const struct imx_rproc_dcfg *dcfg = priv->dcfg; + struct device *dev = priv->dev; + int ret; + + ret = regmap_update_bits(priv->regmap, dcfg->src_reg, + dcfg->src_mask, dcfg->src_stop); + if (ret) + dev_err(dev, "Filed to stop M4!\n"); + + return ret; +} + +static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da, + int len, u64 *sys) +{ + const struct imx_rproc_dcfg *dcfg = priv->dcfg; + int i; + + /* parse address translation table */ + for (i = 0; i < dcfg->att_size; i++) { + const struct imx_rproc_att *att = &dcfg->att[i]; + + if (da >= att->da && da + len < att->da + att->size) { + unsigned int offset = da - att->da; + + *sys = att->sa + offset; + return 0; + } + } + + dev_warn(priv->dev, "Translation filed: da = 0x%llx len = 0x%x\n", + da, len); + return -ENOENT; +} + +static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len) +{ + struct imx_rproc *priv = rproc->priv; + void *va = NULL; + u64 sys; + int i; + + if (len <= 0) + return NULL; + + /* + * On device side we have many aliases, so we need to convert device + * address (M4) to system bus address first. + */ + if (imx_rproc_da_to_sys(priv, da, len, &sys)) + return NULL; + + for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) { + if (sys >= priv->mem[i].sys_addr && sys + len < + priv->mem[i].sys_addr + priv->mem[i].size) { + unsigned int offset = sys - priv->mem[i].sys_addr; + /* __force to make sparse happy with type conversion */ + va = (__force void *)(priv->mem[i].cpu_addr + offset); + break; + } + } + + dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va); + + return va; +} + +static const struct rproc_ops imx_rproc_ops = { + .start = imx_rproc_start, + .stop = imx_rproc_stop, + .da_to_va = imx_rproc_da_to_va, +}; + +static int imx_rproc_addr_init(struct imx_rproc *priv, + struct platform_device *pdev) +{ + const struct imx_rproc_dcfg *dcfg = priv->dcfg; + static const char * const mem_names[] = { "ddr", "ocram", "ocram-s", + "ocram-epdc", "ocram-pxp" }; + struct resource *res; + int a, b = 0, err; + + /* remap required addresses */ + for (a = 0; a < dcfg->att_size; a++) { + const struct imx_rproc_att *att = &dcfg->att[a]; + + if (!(att->flags & ATT_OWN)) + continue; + + if (b > IMX7D_RPROC_MEM_MAX) + break; + + priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev, + att->sa, att->size); + if (IS_ERR(priv->mem[b].cpu_addr)) { + dev_err(&pdev->dev, "devm_ioremap_resource failed\n"); + err = PTR_ERR(priv->mem[b].cpu_addr); + return err; + } + priv->mem[b].sys_addr = att->sa; + priv->mem[b].size = att->size; + b++; + } + + /* remap optional addresses */ + for (a = 0; a < ARRAY_SIZE(mem_names); a++) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + mem_names[a]); + if (!res) + continue; + + if (b > IMX7D_RPROC_MEM_MAX) + break; + + priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(priv->mem[b].cpu_addr)) { + dev_err(&pdev->dev, "devm_ioremap_resource failed\n"); + err = PTR_ERR(priv->mem[b].cpu_addr); + return err; + } + priv->mem[b].sys_addr = res->start; + priv->mem[b].size = resource_size(res); + b++; + } + + return 0; +} + +static int imx_rproc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct imx_rproc *priv; + struct rproc *rproc; + struct regmap_config config = { .name = "imx-rproc" }; + const struct imx_rproc_dcfg *dcfg; + struct regmap *regmap; + int ret; + + regmap = syscon_regmap_lookup_by_phandle(np, "syscon"); + if (IS_ERR(regmap)) { + dev_err(dev, "failed to find syscon\n"); + return PTR_ERR(regmap); + } + regmap_attach_dev(dev, regmap, &config); + + /* set some other name then imx */ + rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops, + NULL, sizeof(*priv)); + if (!rproc) { + ret = -ENOMEM; + goto err; + } + + dcfg = of_device_get_match_data(dev); + if (!dcfg) + return -EINVAL; + + priv = rproc->priv; + priv->rproc = rproc; + priv->regmap = regmap; + priv->dcfg = dcfg; + priv->dev = dev; + + dev_set_drvdata(dev, rproc); + + ret = imx_rproc_addr_init(priv, pdev); + if (ret) { + dev_err(dev, "filed on imx_rproc_addr_init\n"); + goto err_put_rproc; + } + + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + dev_err(dev, "Failed to get clock\n"); + rproc_free(rproc); + return PTR_ERR(priv->clk); + } + + /* + * clk for M4 block including memory. Should be + * enabled before .start for FW transfer. + */ + ret = clk_prepare_enable(priv->clk); + if (ret) { + dev_err(&rproc->dev, "Failed to enable clock\n"); + rproc_free(rproc); + return ret; + } + + ret = rproc_add(rproc); + if (ret) { + dev_err(dev, "rproc_add failed\n"); + goto err_put_clk; + } + + return ret; + +err_put_clk: + clk_disable_unprepare(priv->clk); +err_put_rproc: + rproc_free(rproc); +err: + return ret; +} + +static int imx_rproc_remove(struct platform_device *pdev) +{ + struct rproc *rproc = platform_get_drvdata(pdev); + struct imx_rproc *priv = rproc->priv; + + clk_disable_unprepare(priv->clk); + rproc_del(rproc); + rproc_free(rproc); + + return 0; +} + +static const struct of_device_id imx_rproc_of_match[] = { + { .compatible = "fsl,imx7d-rproc", .data = &imx_rproc_cfg_imx7d }, + { .compatible = "fsl,imx6sx-rproc", .data = &imx_rproc_cfg_imx6sx }, + {}, +}; +MODULE_DEVICE_TABLE(of, imx_rproc_of_match); + +static struct platform_driver imx_rproc_driver = { + .probe = imx_rproc_probe, + .remove = imx_rproc_remove, + .driver = { + .name = "imx-rproc", + .of_match_table = imx_rproc_of_match, + }, +}; + +module_platform_driver(imx_rproc_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver"); +MODULE_AUTHOR("Oleksij Rempel "); -- 2.11.0