Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965132AbbEMAyd (ORCPT ); Tue, 12 May 2015 20:54:33 -0400 Received: from mail-pa0-f51.google.com ([209.85.220.51]:34977 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964979AbbEMAyK (ORCPT ); Tue, 12 May 2015 20:54:10 -0400 From: Brian Norris To: Cc: Brian Norris , Dmitry Torokhov , Anatol Pomazao , Ray Jui , Corneliu Doban , Jonathan Richardson , Scott Branden , Florian Fainelli , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , bcm-kernel-feedback-list@broadcom.com, Dan Ehrenberg , Gregory Fong , , , Kevin Cernekee , Arnd Bergmann Subject: [PATCH v4 08/11] mtd: brcmnand: add BCM63138 support Date: Tue, 12 May 2015 17:53:41 -0700 Message-Id: <1431478424-29230-9-git-send-email-computersforpeace@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431478424-29230-1-git-send-email-computersforpeace@gmail.com> References: <1431478424-29230-1-git-send-email-computersforpeace@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4371 Lines: 147 Signed-off-by: Brian Norris Reviewed-by: Florian Fainelli Tested-by: Florian Fainelli --- v4: split into its own proper platform driver drivers/mtd/nand/brcmnand/Makefile | 1 + drivers/mtd/nand/brcmnand/bcm63138_nand.c | 111 ++++++++++++++++++++++++++++++ 2 files changed, 112 insertions(+) create mode 100644 drivers/mtd/nand/brcmnand/bcm63138_nand.c diff --git a/drivers/mtd/nand/brcmnand/Makefile b/drivers/mtd/nand/brcmnand/Makefile index e78c3b932fd1..45a091e0550f 100644 --- a/drivers/mtd/nand/brcmnand/Makefile +++ b/drivers/mtd/nand/brcmnand/Makefile @@ -1,5 +1,6 @@ # link order matters; don't link the more generic brcmstb_nand.o before the # more specific iproc_nand.o, for instance obj-$(CONFIG_MTD_NAND_BRCMSTB) += iproc_nand.o +obj-$(CONFIG_MTD_NAND_BRCMSTB) += bcm63138_nand.o obj-$(CONFIG_MTD_NAND_BRCMSTB) += brcmstb_nand.o obj-$(CONFIG_MTD_NAND_BRCMSTB) += brcmnand.o diff --git a/drivers/mtd/nand/brcmnand/bcm63138_nand.c b/drivers/mtd/nand/brcmnand/bcm63138_nand.c new file mode 100644 index 000000000000..3f4c44c24e14 --- /dev/null +++ b/drivers/mtd/nand/brcmnand/bcm63138_nand.c @@ -0,0 +1,111 @@ +/* + * Copyright © 2015 Broadcom Corporation + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "brcmnand.h" + +struct bcm63138_nand_soc_priv { + void __iomem *base; +}; + +#define BCM63138_NAND_INT_STATUS 0x00 +#define BCM63138_NAND_INT_EN 0x04 + +enum { + BCM63138_CTLRDY = BIT(4), +}; + +static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc) +{ + struct bcm63138_nand_soc_priv *priv = soc->priv; + void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS; + u32 val = brcmnand_readl(mmio); + + if (val & BCM63138_CTLRDY) { + brcmnand_writel(val & ~BCM63138_CTLRDY, mmio); + return true; + } + + return false; +} + +static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en) +{ + struct bcm63138_nand_soc_priv *priv = soc->priv; + void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN; + u32 val = brcmnand_readl(mmio); + + if (en) + val |= BCM63138_CTLRDY; + else + val &= ~BCM63138_CTLRDY; + + brcmnand_writel(val, mmio); +} + +static int bcm63138_nand_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bcm63138_nand_soc_priv *priv; + struct brcmnand_soc *soc; + struct resource *res; + + soc = devm_kzalloc(dev, sizeof(*soc), GFP_KERNEL); + if (!soc) + return -ENOMEM; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base"); + priv->base = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + soc->pdev = pdev; + soc->priv = priv; + soc->ctlrdy_ack = bcm63138_nand_intc_ack; + soc->ctlrdy_set_enabled = bcm63138_nand_intc_set; + + return brcmnand_probe(pdev, soc); +} + +static const struct of_device_id bcm63138_nand_of_match[] = { + { .compatible = "brcm,nand-bcm63138" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match); + +static struct platform_driver bcm63138_nand_driver = { + .probe = bcm63138_nand_probe, + .remove = brcmnand_remove, + .driver = { + .name = "bcm63138_nand", + .pm = &brcmnand_pm_ops, + .of_match_table = bcm63138_nand_of_match, + } +}; +module_platform_driver(bcm63138_nand_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Brian Norris"); +MODULE_DESCRIPTION("NAND driver for BCM63138"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/