From nobody Thu Feb 12 12:11:26 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1EA0C77B7E for ; Thu, 1 Jun 2023 05:46:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231476AbjFAFqs (ORCPT ); Thu, 1 Jun 2023 01:46:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231474AbjFAFqb (ORCPT ); Thu, 1 Jun 2023 01:46:31 -0400 Received: from forward103a.mail.yandex.net (forward103a.mail.yandex.net [178.154.239.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17853E5A for ; Wed, 31 May 2023 22:46:13 -0700 (PDT) Received: from mail-nwsmtp-smtp-production-main-51.vla.yp-c.yandex.net (mail-nwsmtp-smtp-production-main-51.vla.yp-c.yandex.net [IPv6:2a02:6b8:c1f:5e51:0:640:23ee:0]) by forward103a.mail.yandex.net (Yandex) with ESMTP id 7E8E646D04; Thu, 1 Jun 2023 08:46:11 +0300 (MSK) Received: by mail-nwsmtp-smtp-production-main-51.vla.yp-c.yandex.net (smtp/Yandex) with ESMTPSA id pjGDMhnDduQ0-YQEzRG2A; Thu, 01 Jun 2023 08:46:10 +0300 X-Yandex-Fwd: 1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=maquefel.me; s=mail; t=1685598370; bh=zUol15piszy0DpHFh7aq9OsjbFQ/XdK+rX3Y5m5Tct8=; h=Message-Id:Date:In-Reply-To:Cc:Subject:References:To:From; b=mNLMxmyvWOKZ1qbHS4LNUvJ9HpLHsCg2zDw9xBnBUM2prl7+02tLgazyiAj6qtR8W 7QWjP3jqwoaGL1EoSjIym8BNdAWIWKPR2pUSN8bdVVxtCnXKiyZ9i0h7B1zS+fBwr6 bMLabvG2S6I8UOuAk6y/SnBQtGjdPpiZKp+oAzvQ= Authentication-Results: mail-nwsmtp-smtp-production-main-51.vla.yp-c.yandex.net; dkim=pass header.i=@maquefel.me From: Nikita Shubin To: Alexander Sverdlin , Arnd Bergmann , Linus Walleij , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Jonathan Cameron , Stephen Boyd , Christophe Kerello , Jean Delvare , Nikita Shubin , Liang Yang , Florian Fainelli Cc: Michael Peters , Kris Bahnsen , linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org Subject: [PATCH v1 24/43] mtd: nand: add support for ts72xx Date: Thu, 1 Jun 2023 08:45:29 +0300 Message-Id: <20230601054549.10843-6-nikita.shubin@maquefel.me> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20230424123522.18302-1-nikita.shubin@maquefel.me> References: <20230424123522.18302-1-nikita.shubin@maquefel.me> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Technologic Systems has it's own nand controller implementation in CPLD. This patch adds support for TS-72XX boards family. Signed-off-by: Nikita Shubin --- drivers/mtd/nand/raw/Kconfig | 7 + drivers/mtd/nand/raw/Makefile | 1 + .../nand/raw/technologic-nand-controller.c | 151 ++++++++++++++++++ 3 files changed, 159 insertions(+) create mode 100644 drivers/mtd/nand/raw/technologic-nand-controller.c diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index b523354dfb00..94788da1a169 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -456,6 +456,13 @@ config MTD_NAND_RENESAS Enables support for the NAND controller found on Renesas R-Car Gen3 and RZ/N1 SoC families. =20 +config MTD_NAND_TS72XX + bool "ts72xx NAND controller" + depends on ARCH_EP93XX && HAS_IOMEM + help + Enables support for NAND controller on ts72xx SBCs. + This is a legacy driver based on gen_nand. + comment "Misc" =20 config MTD_SM_COMMON diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 917cdfb815b9..783e990a0078 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -23,6 +23,7 @@ omap2_nand-objs :=3D omap2.o obj-$(CONFIG_MTD_NAND_OMAP2) +=3D omap2_nand.o obj-$(CONFIG_MTD_NAND_OMAP_BCH_BUILD) +=3D omap_elm.o obj-$(CONFIG_MTD_NAND_MARVELL) +=3D marvell_nand.o +obj-$(CONFIG_MTD_NAND_TS72XX) +=3D technologic-nand-controller.o obj-$(CONFIG_MTD_NAND_PLATFORM) +=3D plat_nand.o obj-$(CONFIG_MTD_NAND_PASEMI) +=3D pasemi_nand.o obj-$(CONFIG_MTD_NAND_ORION) +=3D orion_nand.o diff --git a/drivers/mtd/nand/raw/technologic-nand-controller.c b/drivers/m= td/nand/raw/technologic-nand-controller.c new file mode 100644 index 000000000000..09aeada933a1 --- /dev/null +++ b/drivers/mtd/nand/raw/technologic-nand-controller.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Technologic Systems TS72xx NAND controller driver + * + * Copyright (C) 2023 Nikita Shubin + * + * derived: plat_nand.c + * Author: Vitaly Wool + */ + +#include +#include +#include +#include +#include +#include +#include + +#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */ +#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */ + +struct ts72xx_nand_data { + struct nand_controller controller; + struct nand_chip chip; + void __iomem *io_base; +}; + +static int ts72xx_nand_attach_chip(struct nand_chip *chip) +{ + if (chip->ecc.engine_type =3D=3D NAND_ECC_ENGINE_TYPE_SOFT && + chip->ecc.algo =3D=3D NAND_ECC_ALGO_UNKNOWN) + chip->ecc.algo =3D NAND_ECC_ALGO_HAMMING; + + return 0; +} + +static const struct nand_controller_ops ts72xx_nand_ops =3D { + .attach_chip =3D ts72xx_nand_attach_chip, +}; + +static void ts72xx_nand_hwcontrol(struct nand_chip *chip, + int cmd, unsigned int ctrl) +{ + if (ctrl & NAND_CTRL_CHANGE) { + void __iomem *addr =3D chip->legacy.IO_ADDR_R; + unsigned char bits; + + addr +=3D (1 << TS72XX_NAND_CONTROL_ADDR_LINE); + + bits =3D readb(addr) & ~0x07; + bits |=3D (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */ + bits |=3D (ctrl & NAND_CLE); /* bit 1 -> bit 1 */ + bits |=3D (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */ + + writeb(bits, addr); + } + + if (cmd !=3D NAND_CMD_NONE) + writeb(cmd, chip->legacy.IO_ADDR_W); +} + +static int ts72xx_nand_device_ready(struct nand_chip *chip) +{ + void __iomem *addr =3D chip->legacy.IO_ADDR_R; + + addr +=3D (1 << TS72XX_NAND_BUSY_ADDR_LINE); + + return !!(readb(addr) & 0x20); +} + +static int ts72xx_nand_probe(struct platform_device *pdev) +{ + struct ts72xx_nand_data *data; + struct mtd_info *mtd; + int err =3D 0; + + /* Allocate memory for the device structure (and zero it) */ + data =3D devm_kzalloc(&pdev->dev, sizeof(struct ts72xx_nand_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->controller.ops =3D &ts72xx_nand_ops; + nand_controller_init(&data->controller); + data->chip.controller =3D &data->controller; + + data->io_base =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(data->io_base)) + return PTR_ERR(data->io_base); + + nand_set_flash_node(&data->chip, pdev->dev.of_node); + mtd =3D nand_to_mtd(&data->chip); + mtd->dev.parent =3D &pdev->dev; + + data->chip.legacy.IO_ADDR_R =3D data->io_base; + data->chip.legacy.IO_ADDR_W =3D data->io_base; + data->chip.legacy.cmd_ctrl =3D ts72xx_nand_hwcontrol; + data->chip.legacy.dev_ready =3D ts72xx_nand_device_ready; + + platform_set_drvdata(pdev, data); + + /* + * This driver assumes that the default ECC engine should be TYPE_SOFT. + * Set ->engine_type before registering the NAND devices in order to + * provide a driver specific default value. + */ + data->chip.ecc.engine_type =3D NAND_ECC_ENGINE_TYPE_SOFT; + + /* Scan to find existence of the device */ + err =3D nand_scan(&data->chip, 1); + if (err) + return err; + + err =3D mtd_device_parse_register(mtd, NULL, NULL, + NULL, 0); + + if (!err) + return err; + + nand_cleanup(&data->chip); + + return 0; +} + +static void ts72xx_nand_remove(struct platform_device *pdev) +{ + struct ts72xx_nand_data *data =3D platform_get_drvdata(pdev); + struct nand_chip *chip =3D &data->chip; + int ret; + + ret =3D mtd_device_unregister(nand_to_mtd(chip)); + WARN_ON(ret); + nand_cleanup(chip); +} + +static const struct of_device_id ts72xx_id_table[] =3D { + { .compatible =3D "technologic,ts7200-nand" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ts72xx_id_table); + +static struct platform_driver ts72xx_nand_driver =3D { + .driver =3D { + .name =3D "ts72xx-nand", + .of_match_table =3D ts72xx_id_table, + }, + .probe =3D ts72xx_nand_probe, + .remove_new =3D ts72xx_nand_remove, +}; +module_platform_driver(ts72xx_nand_driver); + --=20 2.37.4