From patchwork Tue Apr 9 02:29:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mason Yang X-Patchwork-Id: 10890367 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3BCB3922 for ; Tue, 9 Apr 2019 02:10:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 289E028800 for ; Tue, 9 Apr 2019 02:10:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C9B528818; Tue, 9 Apr 2019 02:10:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 59D4B287D4 for ; Tue, 9 Apr 2019 02:10:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726538AbfDICKJ (ORCPT ); Mon, 8 Apr 2019 22:10:09 -0400 Received: from twhmllg3.macronix.com ([211.75.127.131]:26421 "EHLO TWHMLLG3.macronix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725953AbfDICKI (ORCPT ); Mon, 8 Apr 2019 22:10:08 -0400 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id x3929vUk032141; Tue, 9 Apr 2019 10:09:58 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: broonie@kernel.org, marek.vasut@gmail.com, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, bbrezillon@kernel.org, dwmw2@infradead.org, lee.jones@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, computersforpeace@gmal.com, paul.burton@mips.com, stefan@agner.ch, christophe.kerello@st.com, liang.yang@amlogic.com, geert@linux-m68k.org, devicetree@vger.kernel.org, marcel.ziswiler@toradex.com, linux-mtd@lists.infradead.org, richard@nod.at, miquel.raynal@bootlin.com Cc: juliensu@mxic.com.tw, zhengxunli@mxic.com.tw, Mason Yang Subject: [PATCH v2 2/4] mtd: rawnand: Add Macronix MX25F0A NAND controller driver Date: Tue, 9 Apr 2019 10:29:58 +0800 Message-Id: <1554777000-10542-3-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1554777000-10542-1-git-send-email-masonccyang@mxic.com.tw> References: <1554777000-10542-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG3.macronix.com x3929vUk032141 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a driver for Macronix MX25F0A NAND controller. Signed-off-by: Mason Yang --- drivers/mtd/nand/raw/Kconfig | 6 + drivers/mtd/nand/raw/Makefile | 1 + drivers/mtd/nand/raw/mxic_nand.c | 294 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 301 insertions(+) create mode 100644 drivers/mtd/nand/raw/mxic_nand.c diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig index e604625..e0329cc 100644 --- a/drivers/mtd/nand/raw/Kconfig +++ b/drivers/mtd/nand/raw/Kconfig @@ -522,6 +522,12 @@ config MTD_NAND_QCOM Enables support for NAND flash chips on SoCs containing the EBI2 NAND controller. This controller is found on IPQ806x SoC. +config MTD_NAND_MXIC + tristate "Macronix MX25F0A NAND controller" + depends on HAS_IOMEM + help + This selects the Macronix MX25F0A NAND controller driver. + config MTD_NAND_MTK tristate "Support for NAND controller on MTK SoCs" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile index 5a5a72f..c8a6790 100644 --- a/drivers/mtd/nand/raw/Makefile +++ b/drivers/mtd/nand/raw/Makefile @@ -54,6 +54,7 @@ obj-$(CONFIG_MTD_NAND_SUNXI) += sunxi_nand.o obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/ obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o +obj-$(CONFIG_MTD_NAND_MXIC) += mxic_nand.o obj-$(CONFIG_MTD_NAND_MTK) += mtk_ecc.o mtk_nand.o obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o obj-$(CONFIG_MTD_NAND_STM32_FMC2) += stm32_fmc2_nand.o diff --git a/drivers/mtd/nand/raw/mxic_nand.c b/drivers/mtd/nand/raw/mxic_nand.c new file mode 100644 index 0000000..689fae2 --- /dev/null +++ b/drivers/mtd/nand/raw/mxic_nand.c @@ -0,0 +1,294 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2019 Macronix International Co., Ltd. +// +// Authors: +// Mason Yang +// zhengxunli +// + +#include +#include +#include + +#include "internals.h" + +struct mxic_nand_ctlr { + struct mx25f0a_mfd *mfd; + struct nand_controller base; + struct nand_chip nand; +}; + +static void mxic_host_init(struct mxic_nand_ctlr *mxic) +{ + writel(DATA_STROB_EDO_EN, mxic->mfd->regs + DATA_STROB); + writel(INT_STS_ALL, mxic->mfd->regs + INT_STS_EN); + writel(0x0, mxic->mfd->regs + ONFI_DIN_CNT(0)); + writel(HC_CFG_NIO(8) | HC_CFG_SLV_ACT(0) | HC_CFG_IDLE_SIO_LVL(1) | + HC_CFG_TYPE(1, HC_CFG_TYPE_RAW_NAND) | HC_CFG_MAN_CS_EN, + mxic->mfd->regs + HC_CFG); + writel(0x0, mxic->mfd->regs + HC_EN); +} + +static int mxic_nand_wait_ready(struct nand_chip *chip) +{ + struct mxic_nand_ctlr *mxic = nand_get_controller_data(chip); + u32 sts; + + return readl_poll_timeout(mxic->mfd->regs + INT_STS, sts, + sts & INT_RDY_PIN, 0, USEC_PER_SEC); +} + +static void mxic_nand_select_chip(struct nand_chip *chip, int chipnr) +{ + struct mxic_nand_ctlr *mxic = nand_get_controller_data(chip); + + switch (chipnr) { + case 0: + case 1: + writel(HC_EN_BIT, mxic->mfd->regs + HC_EN); + writel(HC_CFG_MAN_CS_ASSERT | readl(mxic->mfd->regs + HC_CFG), + mxic->mfd->regs + HC_CFG); + break; + + case -1: + writel(~HC_CFG_MAN_CS_ASSERT & readl(mxic->mfd->regs + HC_CFG), + mxic->mfd->regs + HC_CFG); + writel(0, mxic->mfd->regs + HC_EN); + break; + + default: + break; + } +} + +static int mxic_nand_data_xfer(struct mxic_nand_ctlr *mxic, const void *txbuf, + void *rxbuf, unsigned int len) +{ + unsigned int pos = 0; + + while (pos < len) { + unsigned int nbytes = len - pos; + u32 data = 0xffffffff; + u32 sts; + int ret; + + if (nbytes > 4) + nbytes = 4; + + if (txbuf) + memcpy(&data, txbuf + pos, nbytes); + + ret = readl_poll_timeout(mxic->mfd->regs + INT_STS, sts, + sts & INT_TX_EMPTY, 0, USEC_PER_SEC); + if (ret) + return ret; + + writel(data, mxic->mfd->regs + TXD(nbytes % 4)); + + if (rxbuf) { + ret = readl_poll_timeout(mxic->mfd->regs + INT_STS, sts, + sts & INT_TX_EMPTY, 0, + USEC_PER_SEC); + if (ret) + return ret; + + ret = readl_poll_timeout(mxic->mfd->regs + INT_STS, sts, + sts & INT_RX_NOT_EMPTY, 0, + USEC_PER_SEC); + if (ret) + return ret; + + data = readl(mxic->mfd->regs + RXD); + data >>= (8 * (4 - nbytes)); + memcpy(rxbuf + pos, &data, nbytes); + WARN_ON(readl(mxic->mfd->regs + INT_STS) & + INT_RX_NOT_EMPTY); + } else { + readl(mxic->mfd->regs + RXD); + } + WARN_ON(readl(mxic->mfd->regs + INT_STS) & INT_RX_NOT_EMPTY); + + pos += nbytes; + } + + return 0; +} + +static int mxic_nand_exec_op(struct nand_chip *chip, + const struct nand_operation *op, bool check_only) +{ + struct mxic_nand_ctlr *mxic = nand_get_controller_data(chip); + const struct nand_op_instr *instr = NULL; + int i, len = 0, ret = 0; + unsigned int op_id; + unsigned char cmdcnt = 0, addr_cnt = 0, cmd_addr[8] = {0}; + + for (op_id = 0; op_id < op->ninstrs; op_id++) { + instr = &op->instrs[op_id]; + + switch (instr->type) { + case NAND_OP_CMD_INSTR: + cmd_addr[len++] = instr->ctx.cmd.opcode; + cmdcnt++; + break; + + case NAND_OP_ADDR_INSTR: + for (i = 0; i < instr->ctx.addr.naddrs; i++) + cmd_addr[len++] = instr->ctx.addr.addrs[i]; + addr_cnt = i; + break; + + case NAND_OP_DATA_IN_INSTR: + break; + + case NAND_OP_DATA_OUT_INSTR: + writel(instr->ctx.data.len, + mxic->mfd->regs + ONFI_DIN_CNT(0)); + break; + + case NAND_OP_WAITRDY_INSTR: + break; + } + } + + if (op_id == 5 && instr->type == NAND_OP_WAITRDY_INSTR) { + /* + * In case cmd-addr-data-cmd-wait in a sequence, + * separate the 2'nd command, i.e,. nand_prog_page_op() + */ + writel(OP_CMD_BUSW(OP_BUSW_8) | OP_ADDR_BUSW(OP_BUSW_8) | + OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | + OP_ADDR_BYTES(addr_cnt) | + OP_CMD_BYTES(1), mxic->mfd->regs + SS_CTRL(0)); + writel(0, mxic->mfd->regs + HC_EN); + writel(HC_EN_BIT, mxic->mfd->regs + HC_EN); + + mxic_nand_data_xfer(mxic, cmd_addr, NULL, len - 1); + + mxic_nand_data_xfer(mxic, instr->ctx.data.buf.out, NULL, + instr->ctx.data.len); + + writel(0, mxic->mfd->regs + HC_EN); + writel(HC_EN_BIT, mxic->mfd->regs + HC_EN); + mxic_nand_data_xfer(mxic, &cmd_addr[--len], NULL, 1); + ret = mxic_nand_wait_ready(chip); + if (ret) + goto err_out; + return ret; + } + + if (len) { + writel(OP_CMD_BUSW(OP_BUSW_8) | OP_ADDR_BUSW(OP_BUSW_8) | + OP_DATA_BUSW(OP_BUSW_8) | OP_DUMMY_CYC(0x3F) | + OP_ADDR_BYTES(addr_cnt) | + OP_CMD_BYTES(cmdcnt > 0 ? cmdcnt : 0), + mxic->mfd->regs + SS_CTRL(0)); + writel(0, mxic->mfd->regs + HC_EN); + writel(HC_EN_BIT, mxic->mfd->regs + HC_EN); + + mxic_nand_data_xfer(mxic, cmd_addr, NULL, len); + } + + for (op_id = 0; op_id < op->ninstrs; op_id++) { + instr = &op->instrs[op_id]; + + switch (instr->type) { + case NAND_OP_CMD_INSTR: + case NAND_OP_ADDR_INSTR: + break; + + case NAND_OP_DATA_IN_INSTR: + writel(0x0, mxic->mfd->regs + ONFI_DIN_CNT(0)); + writel(readl(mxic->mfd->regs + SS_CTRL(0)) | OP_READ, + mxic->mfd->regs + SS_CTRL(0)); + mxic_nand_data_xfer(mxic, NULL, instr->ctx.data.buf.in, + instr->ctx.data.len); + break; + + case NAND_OP_DATA_OUT_INSTR: + mxic_nand_data_xfer(mxic, instr->ctx.data.buf.out, NULL, + instr->ctx.data.len); + break; + + case NAND_OP_WAITRDY_INSTR: + ret = mxic_nand_wait_ready(chip); + if (ret) + goto err_out; + break; + } + } + +err_out: + return ret; +} + +static const struct nand_controller_ops mxic_nand_controller_ops = { + .exec_op = mxic_nand_exec_op, +}; + +static int mx25f0a_nand_probe(struct platform_device *pdev) +{ + struct mtd_info *mtd; + struct mx25f0a_mfd *mfd = dev_get_drvdata(pdev->dev.parent); + struct mxic_nand_ctlr *mxic; + struct nand_chip *nand_chip; + int err; + + mxic = devm_kzalloc(&pdev->dev, sizeof(struct mxic_nand_ctlr), + GFP_KERNEL); + if (!mxic) + return -ENOMEM; + + nand_chip = &mxic->nand; + mtd = nand_to_mtd(nand_chip); + mtd->dev.parent = pdev->dev.parent; + nand_chip->ecc.priv = NULL; + nand_set_flash_node(nand_chip, pdev->dev.parent->of_node); + nand_chip->priv = mxic; + + mxic->mfd = mfd; + + nand_chip->legacy.select_chip = mxic_nand_select_chip; + mxic->base.ops = &mxic_nand_controller_ops; + nand_controller_init(&mxic->base); + nand_chip->controller = &mxic->base; + + mxic_host_init(mxic); + + err = nand_scan(nand_chip, 1); + if (err) + goto fail; + + err = mtd_device_register(mtd, NULL, 0); + if (err) + goto fail; + + platform_set_drvdata(pdev, mxic); + + return 0; +fail: + return err; +} + +static int mx25f0a_nand_remove(struct platform_device *pdev) +{ + struct mxic_nand_ctlr *mxic = platform_get_drvdata(pdev); + + nand_release(&mxic->nand); + + return 0; +} + +static struct platform_driver mx25f0a_nand_driver = { + .probe = mx25f0a_nand_probe, + .remove = mx25f0a_nand_remove, + .driver = { + .name = "mxic-nand-ctlr", + }, +}; +module_platform_driver(mx25f0a_nand_driver); + +MODULE_AUTHOR("Mason Yang "); +MODULE_DESCRIPTION("MX25F0A RAW NAND controller driver"); +MODULE_LICENSE("GPL v2");