Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757504AbbLBXof (ORCPT ); Wed, 2 Dec 2015 18:44:35 -0500 Received: from proxima.lp0.eu ([81.2.80.65]:50941 "EHLO proxima.lp0.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756980AbbLBXoc (ORCPT ); Wed, 2 Dec 2015 18:44:32 -0500 Subject: [PATCH 3/3] mtd: brcmnand: Add support for the BCM6368 To: "devicetree@vger.kernel.org" , Brian Norris , Linux Kernel Mailing List , David Woodhouse , linux-mtd@lists.infradead.org References: <565F81A6.6060307@simon.arlott.org.uk> Cc: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , Florian Fainelli , bcm-kernel-feedback-list@broadcom.com, Kamal Dasu From: Simon Arlott Message-ID: <565F823F.2090208@simon.arlott.org.uk> Date: Wed, 2 Dec 2015 23:43:59 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <565F81A6.6060307@simon.arlott.org.uk> 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: 5821 Lines: 191 The BCM6368 has a NAND interrupt register with combined status and enable registers. As the BCM6328, BCM6362 and BCM6368 all use v2.1 controllers, the first variant that will work with this driver is the BCM63268 using a v4.0 controller. Set up the device by disabling and acking all interrupts, then handle the CTRL_READY interrupt. Signed-off-by: Simon Arlott --- Renamed from BCM63268, moved clock to brcmnand. drivers/mtd/nand/brcmnand/Makefile | 1 + drivers/mtd/nand/brcmnand/bcm6368_nand.c | 145 +++++++++++++++++++++++++++++++ 2 files changed, 146 insertions(+) create mode 100644 drivers/mtd/nand/brcmnand/bcm6368_nand.c diff --git a/drivers/mtd/nand/brcmnand/Makefile b/drivers/mtd/nand/brcmnand/Makefile index 3b1fbfd..b28ffb59 100644 --- a/drivers/mtd/nand/brcmnand/Makefile +++ b/drivers/mtd/nand/brcmnand/Makefile @@ -2,5 +2,6 @@ # more specific iproc_nand.o, for instance obj-$(CONFIG_MTD_NAND_BRCMNAND) += iproc_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += bcm63138_nand.o +obj-$(CONFIG_MTD_NAND_BRCMNAND) += bcm6368_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmstb_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand.o diff --git a/drivers/mtd/nand/brcmnand/bcm6368_nand.c b/drivers/mtd/nand/brcmnand/bcm6368_nand.c new file mode 100644 index 0000000..c347ea5 --- /dev/null +++ b/drivers/mtd/nand/brcmnand/bcm6368_nand.c @@ -0,0 +1,145 @@ +/* + * Copyright 2015 Simon Arlott + * + * 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. + * + * Derived from bcm63138_nand.c: + * Copyright © 2015 Broadcom Corporation + * + * Derived from bcm963xx_4.12L.06B_consumer/shared/opensource/include/bcm963xx/63268_map_part.h: + * Copyright 2000-2010 Broadcom Corporation + * + * Derived from bcm963xx_4.12L.06B_consumer/shared/opensource/flash/nandflash.c: + * Copyright 2000-2010 Broadcom Corporation + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "brcmnand.h" + +struct bcm6368_nand_soc { + struct brcmnand_soc soc; + void __iomem *base; +}; + +#define BCM6368_NAND_INT 0x00 +#define BCM6368_NAND_STATUS_SHIFT 0 +#define BCM6368_NAND_STATUS_MASK (0xfff << BCM6368_NAND_STATUS_SHIFT) +#define BCM6368_NAND_ENABLE_SHIFT 16 +#define BCM6368_NAND_ENABLE_MASK (0xffff << BCM6368_NAND_ENABLE_SHIFT) +#define BCM6368_NAND_BASE_ADDR0 0x04 +#define BCM6368_NAND_BASE_ADDR1 0x0c + +enum { + BCM6368_NP_READ = BIT(0), + BCM6368_BLOCK_ERASE = BIT(1), + BCM6368_COPY_BACK = BIT(2), + BCM6368_PAGE_PGM = BIT(3), + BCM6368_CTRL_READY = BIT(4), + BCM6368_DEV_RBPIN = BIT(5), + BCM6368_ECC_ERR_UNC = BIT(6), + BCM6368_ECC_ERR_CORR = BIT(7), +}; + +static bool bcm6368_nand_intc_ack(struct brcmnand_soc *soc) +{ + struct bcm6368_nand_soc *priv = + container_of(soc, struct bcm6368_nand_soc, soc); + void __iomem *mmio = priv->base + BCM6368_NAND_INT; + u32 val = brcmnand_readl(mmio); + + if (val & (BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT)) { + /* Ack interrupt */ + val &= ~BCM6368_NAND_STATUS_MASK; + val |= BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT; + brcmnand_writel(val, mmio); + return true; + } + + return false; +} + +static void bcm6368_nand_intc_set(struct brcmnand_soc *soc, bool en) +{ + struct bcm6368_nand_soc *priv = + container_of(soc, struct bcm6368_nand_soc, soc); + void __iomem *mmio = priv->base + BCM6368_NAND_INT; + u32 val = brcmnand_readl(mmio); + + /* Don't ack any interrupts */ + val &= ~BCM6368_NAND_STATUS_MASK; + + if (en) + val |= BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT; + else + val &= ~(BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT); + + brcmnand_writel(val, mmio); +} + +static int bcm6368_nand_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bcm6368_nand_soc *priv; + struct brcmnand_soc *soc; + struct resource *res; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + soc = &priv->soc; + + res = platform_get_resource_byname(pdev, + IORESOURCE_MEM, "nand-intr-base"); + if (!res) + return -EINVAL; + + priv->base = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + soc->ctlrdy_ack = bcm6368_nand_intc_ack; + soc->ctlrdy_set_enabled = bcm6368_nand_intc_set; + + /* Disable and ack all interrupts */ + brcmnand_writel(0, priv->base + BCM6368_NAND_INT); + brcmnand_writel(BCM6368_NAND_STATUS_MASK, + priv->base + BCM6368_NAND_INT); + + return brcmnand_probe(pdev, soc); +} + +static const struct of_device_id bcm6368_nand_of_match[] = { + { .compatible = "brcm,nand-bcm6368" }, + {}, +}; +MODULE_DEVICE_TABLE(of, bcm6368_nand_of_match); + +static struct platform_driver bcm6368_nand_driver = { + .probe = bcm6368_nand_probe, + .remove = brcmnand_remove, + .driver = { + .name = "bcm6368_nand", + .pm = &brcmnand_pm_ops, + .of_match_table = bcm6368_nand_of_match, + } +}; +module_platform_driver(bcm6368_nand_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Simon Arlott"); +MODULE_DESCRIPTION("NAND driver for BCM6368"); -- 2.1.4 -- Simon Arlott -- 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/