From patchwork Mon Nov 25 20:00:54 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Khoronzhuk X-Patchwork-Id: 3234221 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id C07129F3A0 for ; Mon, 25 Nov 2013 20:02:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3CF2F20304 for ; Mon, 25 Nov 2013 20:02:33 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 112C1202DD for ; Mon, 25 Nov 2013 20:02:31 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vl2MN-0005Sj-S8; Mon, 25 Nov 2013 20:02:20 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vl2ML-0004gt-FG; Mon, 25 Nov 2013 20:02:17 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vl2MB-0004f3-4S; Mon, 25 Nov 2013 20:02:08 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id rAPK1RlA019926; Mon, 25 Nov 2013 14:01:27 -0600 Received: from DLEE70.ent.ti.com (dlee70.ent.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id rAPK1RiC015517; Mon, 25 Nov 2013 14:01:27 -0600 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.2.342.3; Mon, 25 Nov 2013 14:01:27 -0600 Received: from uglx0177649.ucm2.emeaucm.ext.ti.com (uglx0177649.ucm2.emeaucm.ext.ti.com [10.167.145.122]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id rAPK1Mmu025096; Mon, 25 Nov 2013 14:01:23 -0600 From: Ivan Khoronzhuk To: Subject: [PATCH] ARM: davinci: aemif: get rid of davinci-nand driver dependency on aemif Date: Mon, 25 Nov 2013 22:00:54 +0200 Message-ID: <1385409654-19006-1-git-send-email-ivan.khoronzhuk@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <5291CB01.1010506@ti.com> References: <5291CB01.1010506@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131125_150207_373638_B505D3F9 X-CRM114-Status: GOOD ( 24.76 ) X-Spam-Score: -6.9 (------) Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, grygorii.strashko@ti.com, linux@arm.linux.org.uk, pawel.moll@arm.com, swarren@wwwdotorg.org, ijc+devicetree@hellion.org.uk, galak@kernel.crashing.org, rob.herring@calxeda.com, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, rob@landley.net, Ivan Khoronzhuk , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The problem that the set timings code contains the call of Davinci platform function davinci_aemif_setup_timing() which is not accessible if kernel is built for another platform like Keystone. The Keysone platform is going to use TI AEMIF driver. If TI AEMIF is used we don't need to set timings and bus width. It is done by AEMIF driver. To get rid of davinci-nand driver dependency on aemif platform code we moved aemif code to davinci platform. The platform AEMIF code (aemif.c) has to be removed once Davinci will be converted to DT and use ti-aemif.c driver. Signed-off-by: Ivan Khoronzhuk --- arch/arm/mach-davinci/aemif.c | 73 ++++++++++++++++++++++- arch/arm/mach-davinci/board-da830-evm.c | 3 + arch/arm/mach-davinci/board-da850-evm.c | 3 + arch/arm/mach-davinci/board-dm355-evm.c | 5 ++ arch/arm/mach-davinci/board-dm355-leopard.c | 5 ++ arch/arm/mach-davinci/board-dm365-evm.c | 4 ++ arch/arm/mach-davinci/board-dm644x-evm.c | 5 ++ arch/arm/mach-davinci/board-dm646x-evm.c | 3 + arch/arm/mach-davinci/board-mityomapl138.c | 3 + arch/arm/mach-davinci/board-neuros-osd2.c | 9 ++- arch/arm/mach-davinci/devices-tnetv107x.c | 3 + drivers/mtd/nand/davinci_nand.c | 23 ------- include/linux/platform_data/mtd-davinci-aemif.h | 5 +- 13 files changed, 116 insertions(+), 28 deletions(-) diff --git a/arch/arm/mach-davinci/aemif.c b/arch/arm/mach-davinci/aemif.c index f091a90..51b14c6 100644 --- a/arch/arm/mach-davinci/aemif.c +++ b/arch/arm/mach-davinci/aemif.c @@ -16,6 +16,7 @@ #include #include +#include /* Timing value configuration */ @@ -43,6 +44,17 @@ WSTROBE(WSTROBE_MAX) | \ WSETUP(WSETUP_MAX)) +static inline unsigned int davinci_aemif_readl(void __iomem *base, int offset) +{ + return readl_relaxed(base + offset); +} + +static inline void davinci_aemif_writel(void __iomem *base, + int offset, unsigned long value) +{ + writel_relaxed(value, base + offset); +} + /* * aemif_calc_rate - calculate timing data. * @wanted: The cycle time needed in nanoseconds. @@ -86,7 +98,7 @@ static int aemif_calc_rate(int wanted, unsigned long clk, int max) * * Returns 0 on success, else negative errno. */ -int davinci_aemif_setup_timing(struct davinci_aemif_timing *t, +static int davinci_aemif_setup_timing(struct davinci_aemif_timing *t, void __iomem *base, unsigned cs) { unsigned set, val; @@ -130,4 +142,61 @@ int davinci_aemif_setup_timing(struct davinci_aemif_timing *t, return 0; } -EXPORT_SYMBOL(davinci_aemif_setup_timing); + +/** + * davinci_aemif_setup - setup AEMIF interface by davinci_nand_pdata + * @pdev - link to platform device to setup settings for + * + * This function does not use any locking while programming the AEMIF + * because it is expected that there is only one user of a given + * chip-select. + * + * Returns 0 on success, else negative errno. + */ +int davinci_aemif_setup(struct platform_device *pdev) +{ + struct davinci_nand_pdata *pdata = dev_get_platdata(&pdev->dev); + uint32_t val; + struct resource *res; + void __iomem *base; + int ret = 0; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) { + dev_err(&pdev->dev, "cannot get IORESOURCE_MEM\n"); + return -ENOMEM; + } + + base = ioremap(res->start, resource_size(res)); + if (!base) { + dev_err(&pdev->dev, "ioremap failed for resource %pR\n", res); + ret = -ENOMEM; + goto err; + } + + /* + * Setup Async configuration register in case we did not boot + * from NAND and so bootloader did not bother to set it up. + */ + val = davinci_aemif_readl(base, A1CR_OFFSET + pdev->id * 4); + /* + * Extended Wait is not valid and Select Strobe mode is not + * used + */ + val &= ~(ACR_ASIZE_MASK | ACR_EW_MASK | ACR_SS_MASK); + if (pdata->options & NAND_BUSWIDTH_16) + val |= 0x1; + + davinci_aemif_writel(base, A1CR_OFFSET + pdev->id * 4, val); + + if (pdata->timing) + ret = davinci_aemif_setup_timing(pdata->timing, base, pdev->id); + + if (ret < 0) + dev_dbg(&pdev->dev, "NAND timing values setup fail\n"); + +err: + iounmap(base); + return ret; +} +EXPORT_SYMBOL(davinci_aemif_setup); diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index d1f45af..5623131 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -419,6 +419,9 @@ static inline void da830_evm_init_nand(int mux_mode) if (ret) pr_warning("da830_evm_init: NAND device not registered.\n"); + if (davinci_aemif_setup(&da830_evm_nand_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); + gpio_direction_output(mux_mode, 1); } #else diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index e0af0ec..234c5bb 100644 --- a/arch/arm/mach-davinci/board-da850-evm.c +++ b/arch/arm/mach-davinci/board-da850-evm.c @@ -358,6 +358,9 @@ static inline void da850_evm_setup_nor_nand(void) platform_add_devices(da850_evm_devices, ARRAY_SIZE(da850_evm_devices)); + + if (davinci_aemif_setup(&da850_evm_nandflash_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); } } diff --git a/arch/arm/mach-davinci/board-dm355-evm.c b/arch/arm/mach-davinci/board-dm355-evm.c index ecdc7d4..f35095f 100644 --- a/arch/arm/mach-davinci/board-dm355-evm.c +++ b/arch/arm/mach-davinci/board-dm355-evm.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -395,6 +396,10 @@ static __init void dm355_evm_init(void) platform_add_devices(davinci_evm_devices, ARRAY_SIZE(davinci_evm_devices)); + + if (davinci_aemif_setup(&davinci_nand_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); + evm_init_i2c(); davinci_serial_init(dm355_serial_device); diff --git a/arch/arm/mach-davinci/board-dm355-leopard.c b/arch/arm/mach-davinci/board-dm355-leopard.c index 43bacbf..7f45c5a 100644 --- a/arch/arm/mach-davinci/board-dm355-leopard.c +++ b/arch/arm/mach-davinci/board-dm355-leopard.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -253,6 +254,10 @@ static __init void dm355_leopard_init(void) platform_add_devices(davinci_leopard_devices, ARRAY_SIZE(davinci_leopard_devices)); + + if (davinci_aemif_setup(&davinci_nand_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); + leopard_init_i2c(); davinci_serial_init(dm355_serial_device); diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c index e08a868..88c01c3 100644 --- a/arch/arm/mach-davinci/board-dm365-evm.c +++ b/arch/arm/mach-davinci/board-dm365-evm.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include @@ -665,6 +666,9 @@ fail: platform_add_devices(dm365_evm_nand_devices, ARRAY_SIZE(dm365_evm_nand_devices)); + + if (davinci_aemif_setup(&davinci_nand_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); } else { /* no OneNAND support yet */ } diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c index 987605b7..5602957 100644 --- a/arch/arm/mach-davinci/board-dm644x-evm.c +++ b/arch/arm/mach-davinci/board-dm644x-evm.c @@ -778,6 +778,11 @@ static __init void davinci_evm_init(void) /* only one device will be jumpered and detected */ if (HAS_NAND) { platform_device_register(&davinci_evm_nandflash_device); + + if (davinci_aemif_setup(&davinci_evm_nandflash_device)) + pr_warn("%s: Cannot configure AEMIF.\n", + __func__); + evm_leds[7].default_trigger = "nand-disk"; if (HAS_NOR) pr_warning("WARNING: both NAND and NOR flash " diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c index 13d0801..ae129bc 100644 --- a/arch/arm/mach-davinci/board-dm646x-evm.c +++ b/arch/arm/mach-davinci/board-dm646x-evm.c @@ -805,6 +805,9 @@ static __init void evm_init(void) platform_device_register(&davinci_nand_device); + if (davinci_aemif_setup(&davinci_nand_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); + dm646x_init_edma(dm646x_edma_rsv); if (HAS_ATA) diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c index 7aa105b..98a66ff 100644 --- a/arch/arm/mach-davinci/board-mityomapl138.c +++ b/arch/arm/mach-davinci/board-mityomapl138.c @@ -432,6 +432,9 @@ static void __init mityomapl138_setup_nand(void) { platform_add_devices(mityomapl138_devices, ARRAY_SIZE(mityomapl138_devices)); + + if (davinci_aemif_setup(&mityomapl138_nandflash_device)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); } static const short mityomap_mii_pins[] = { diff --git a/arch/arm/mach-davinci/board-neuros-osd2.c b/arch/arm/mach-davinci/board-neuros-osd2.c index bb680af..a7d6668 100644 --- a/arch/arm/mach-davinci/board-neuros-osd2.c +++ b/arch/arm/mach-davinci/board-neuros-osd2.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include @@ -192,9 +193,15 @@ static __init void davinci_ntosd2_init(void) davinci_cfg_reg(DM644X_ATAEN_DISABLE); /* only one device will be jumpered and detected */ - if (HAS_NAND) + if (HAS_NAND) { platform_device_register( &davinci_ntosd2_nandflash_device); + + if (davinci_aemif_setup( + &davinci_ntosd2_nandflash_device)) + pr_warn("%s: Cannot configure AEMIF.\n", + __func__); + } } platform_add_devices(davinci_ntosd2_devices, diff --git a/arch/arm/mach-davinci/devices-tnetv107x.c b/arch/arm/mach-davinci/devices-tnetv107x.c index 01d8686..de4862e 100644 --- a/arch/arm/mach-davinci/devices-tnetv107x.c +++ b/arch/arm/mach-davinci/devices-tnetv107x.c @@ -324,6 +324,9 @@ static int __init nand_init(int chipsel, struct davinci_nand_pdata *data) return ret; } + if (davinci_aemif_setup(pdev)) + pr_warn("%s: Cannot configure AEMIF.\n", __func__); + return platform_device_register(pdev); } diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index b77a01e..6cc506c 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -734,28 +734,6 @@ static int __init nand_davinci_probe(struct platform_device *pdev) goto err_clk_enable; } - /* - * Setup Async configuration register in case we did not boot from - * NAND and so bootloader did not bother to set it up. - */ - val = davinci_nand_readl(info, A1CR_OFFSET + info->core_chipsel * 4); - - /* Extended Wait is not valid and Select Strobe mode is not used */ - val &= ~(ACR_ASIZE_MASK | ACR_EW_MASK | ACR_SS_MASK); - if (info->chip.options & NAND_BUSWIDTH_16) - val |= 0x1; - - davinci_nand_writel(info, A1CR_OFFSET + info->core_chipsel * 4, val); - - ret = 0; - if (info->timing) - ret = davinci_aemif_setup_timing(info->timing, info->base, - info->core_chipsel); - if (ret < 0) { - dev_dbg(&pdev->dev, "NAND timing values setup fail\n"); - goto err_timing; - } - spin_lock_irq(&davinci_nand_lock); /* put CSxNAND into NAND mode */ @@ -844,7 +822,6 @@ syndrome_done: return 0; err_scan: -err_timing: clk_disable_unprepare(info->clk); err_clk_enable: diff --git a/include/linux/platform_data/mtd-davinci-aemif.h b/include/linux/platform_data/mtd-davinci-aemif.h index 05b2934..97948ac 100644 --- a/include/linux/platform_data/mtd-davinci-aemif.h +++ b/include/linux/platform_data/mtd-davinci-aemif.h @@ -10,6 +10,8 @@ #ifndef _MACH_DAVINCI_AEMIF_H #define _MACH_DAVINCI_AEMIF_H +#include + #define NRCSR_OFFSET 0x00 #define AWCCR_OFFSET 0x04 #define A1CR_OFFSET 0x10 @@ -31,6 +33,5 @@ struct davinci_aemif_timing { u8 ta; }; -int davinci_aemif_setup_timing(struct davinci_aemif_timing *t, - void __iomem *base, unsigned cs); +int davinci_aemif_setup(struct platform_device *pdev); #endif