From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pa0-x22e.google.com ([2607:f8b0:400e:c03::22e]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yq3dQ-0004BQ-Ck for linux-mtd@lists.infradead.org; Wed, 06 May 2015 18:01:31 +0000 Received: by pabsx10 with SMTP id sx10so15942253pab.3 for ; Wed, 06 May 2015 11:01:09 -0700 (PDT) From: Brian Norris To: Subject: [PATCH v3 07/10] mtd: brcsmtb_nand_soc: add support for BCM63138 Date: Wed, 6 May 2015 10:59:51 -0700 Message-Id: <1430935194-7579-8-git-send-email-computersforpeace@gmail.com> In-Reply-To: <1430935194-7579-1-git-send-email-computersforpeace@gmail.com> References: <1430935194-7579-1-git-send-email-computersforpeace@gmail.com> Cc: devicetree@vger.kernel.org, Florian Fainelli , Scott Branden , Kevin Cernekee , Corneliu Doban , Ray Jui , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , linux-kernel@vger.kernel.org, Dan Ehrenberg , Jonathan Richardson , Anatol Pomazao , Gregory Fong , bcm-kernel-feedback-list@broadcom.com, Brian Norris , Dmitry Torokhov List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This SoC just has its custom interrupt status bits. Signed-off-by: Brian Norris --- drivers/mtd/nand/brcmstb_nand_soc.c | 69 +++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) diff --git a/drivers/mtd/nand/brcmstb_nand_soc.c b/drivers/mtd/nand/brcmstb_nand_soc.c index 970912c690a7..c878334edb1a 100644 --- a/drivers/mtd/nand/brcmstb_nand_soc.c +++ b/drivers/mtd/nand/brcmstb_nand_soc.c @@ -28,7 +28,76 @@ struct brcmnand_soc_ofdata { void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare); }; +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 = __raw_readl(mmio); + + if (val & BCM63138_CTLRDY) { + __raw_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 = __raw_readl(mmio); + + if (en) + val |= BCM63138_CTLRDY; + else + val &= ~BCM63138_CTLRDY; + + __raw_writel(val, mmio); +} + +static int bcm63138_nand_soc_init(struct brcmnand_soc *soc) +{ + struct bcm63138_nand_soc_priv *priv; + + priv = devm_kzalloc(soc->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->base = of_io_request_and_map(soc->dn, 0, DRV_NAME); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + soc->priv = priv; + + /* Clear the interrupt */ + bcm63138_nand_intc_ack(soc); + + return 0; +} + +static const struct brcmnand_soc_ofdata bcm63138_nand_soc = { + .init = bcm63138_nand_soc_init, + .ctlrdy_ack = bcm63138_nand_intc_ack, + .ctlrdy_set_enabled = bcm63138_nand_intc_set, +}; + static const struct of_device_id brcmnand_soc_ofmatch[] = { + { + .compatible = "brcm,nand-soc-bcm63138", + .data = &bcm63138_nand_soc, + }, {}, }; -- 1.9.1