From patchwork Thu Mar 12 13:56:04 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alessandro Rubini X-Patchwork-Id: 24343 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id BCBDEDE0D8 for ; Fri, 13 Mar 2009 01:01:24 +1100 (EST) Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1LhlPF-0000gV-Si; Thu, 12 Mar 2009 13:57:06 +0000 Received: from mail2.gnudd.com ([213.203.150.91] helo=mail.gnudd.com) by bombadil.infradead.org with esmtps (Exim 4.69 #1 (Red Hat Linux)) id 1LhlP6-0000f1-Pl for linux-mtd@lists.infradead.org; Thu, 12 Mar 2009 13:57:04 +0000 Received: from mail.gnudd.com (rubini@localhost [127.0.0.1]) by mail.gnudd.com (8.13.4/8.13.4/Debian-3sarge3) with ESMTP id n2CDu7kt000683; Thu, 12 Mar 2009 14:56:07 +0100 Received: (from rubini@localhost) by mail.gnudd.com (8.13.4/8.13.4/Submit) id n2CDu42e000680; Thu, 12 Mar 2009 14:56:04 +0100 Date: Thu, 12 Mar 2009 14:56:04 +0100 From: Alessandro Rubini To: linux-arm-kernel@lists.arm.linux.org.uk Subject: [PATCH V2] Nand driver for Nomadik 8815 SoC (on NHK8815 board) Message-ID: <20090312135604.GA673@mail.gnudd.com> Mail-Followup-To: Alessandro Rubini , linux-arm-kernel@lists.arm.linux.org.uk, linux-mtd@lists.infradead.org, andrea.gallo@stericsson.com, STEricsson_nomadik_linux@list.st.com Mime-Version: 1.0 Content-Disposition: inline X-Face: #Q; A)@_4.#>0+_%y]7aBr:c"ndLp&#+2?]J; lkse\^)FP^Lr5@O0{)J; 'nny4%74.fM'n)M >ISCj.KmsL/HTxz!:Ju'pnj'Gz&. Organization: GnuDD, Device Drivers, Embedded Systems, Courses X-Spam-Score: 0.0 (/) Cc: STEricsson_nomadik_linux@list.st.com, linux-mtd@lists.infradead.org, andrea.gallo@stericsson.com X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Alessandro Rubini The patch is incremental over base Nomadik support as posted to linux-arm-kernel. --- V2: rebased over cleaned-up base nomadik support. The new nomadik patch is available in full from http://gnudd.com/pub/patches/nomadik/ Add-basic-support-for-ST-Nomadik-8815-SoC-V2.patch The version posted to linux-arm-kernel misses the default configuration file for size reasons. arch/arm/configs/nhk15_defconfig | 1 + arch/arm/mach-nomadik/board-8815nhk.c | 93 +++++++- arch/arm/mach-nomadik/include/mach/fsmc.h | 36 +++ arch/arm/mach-nomadik/include/mach/hardware.h | 5 +- arch/arm/mach-nomadik/include/mach/nand.h | 16 ++ drivers/mtd/nand/Kconfig | 6 + drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/nomadik_nand.c | 329 +++++++++++++++++++++++++ 8 files changed, 484 insertions(+), 3 deletions(-) create mode 100644 arch/arm/mach-nomadik/include/mach/fsmc.h create mode 100644 arch/arm/mach-nomadik/include/mach/nand.h create mode 100644 drivers/mtd/nand/nomadik_nand.c diff --git a/arch/arm/configs/nhk15_defconfig b/arch/arm/configs/nhk15_defconfig index cf11d79..1697efe 100644 --- a/arch/arm/configs/nhk15_defconfig +++ b/arch/arm/configs/nhk15_defconfig @@ -476,6 +476,7 @@ CONFIG_MTD_NAND_IDS=y # CONFIG_MTD_NAND_DISKONCHIP is not set # CONFIG_MTD_NAND_NANDSIM is not set # CONFIG_MTD_NAND_PLATFORM is not set +CONFIG_MTD_NAND_NOMADIK=y # CONFIG_MTD_ONENAND is not set # diff --git a/arch/arm/mach-nomadik/board-8815nhk.c b/arch/arm/mach-nomadik/board-8815nhk.c index 5dda007..1e5b332 100644 --- a/arch/arm/mach-nomadik/board-8815nhk.c +++ b/arch/arm/mach-nomadik/board-8815nhk.c @@ -19,15 +19,106 @@ #include #include #include +#include +#include +#include +#include #include #include #include #include #include +#include +#include + +/* These adresses span 16MB, so use three individual pages */ +static struct resource nhk8815_nand_resources[] = { + { + .name = "nand_addr", + .start = NAND_IO_ADDR, + .end = NAND_IO_ADDR + 0xfff, + .flags = IORESOURCE_MEM, + }, { + .name = "nand_cmd", + .start = NAND_IO_CMD, + .end = NAND_IO_CMD + 0xfff, + .flags = IORESOURCE_MEM, + }, { + .name = "nand_data", + .start = NAND_IO_DATA, + .end = NAND_IO_DATA + 0xfff, + .flags = IORESOURCE_MEM, + } +}; + +static int nhk8815_nand_init(void) +{ + /* FSMC setup for nand chip select (8-bit nand in 8815NHK) */ + writel(0x0000000E, FSMC_PCR0); + writel(0x000D0A00, FSMC_PMEM0); + writel(0x00100A00, FSMC_PATT0); + + /* enable access to the chip select area */ + writel(readl(FSMC_PCR0) | 0x04, FSMC_PCR0); + + return 0; +} + +static struct mtd_partition nhk8815_partitions[] = { + { + .name = "X-Loader(NAND)", + .offset = 0, + .size = SZ_256K, + }, { + .name = "MemInit(NAND)", + .offset = MTDPART_OFS_APPEND, + .size = SZ_256K, + }, { + .name = "BootLoader(NAND)", + .offset = MTDPART_OFS_APPEND, + .size = SZ_2M, + }, { + .name = "Kernel zImage(NAND)", + .offset = MTDPART_OFS_APPEND, + .size = 3 * SZ_1M, + }, { + .name = "Root Filesystem(NAND)", + .offset = MTDPART_OFS_APPEND, + .size = 22* SZ_1M, + }, { + /* This can't be SIZ_FULL as we have the u-boot env */ + .name = "User Filesystem(NAND)", + .offset = MTDPART_OFS_APPEND, + .size = 100 * SZ_1M, + }, { + .name = "U-Boot Environment", + .offset = 0x8000000 - SZ_128K, + .size = SZ_128K, + } +}; + +static struct nomadik_nand_platform_data nhk8815_nand_data = { + .parts = nhk8815_partitions, + .nparts = ARRAY_SIZE(nhk8815_partitions), + .options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING \ + | NAND_NO_READRDY | NAND_NO_AUTOINCR, + .init = nhk8815_nand_init, +}; + +static struct platform_device nhk8815_nand_device = { + .name = "nomadik_nand", + .dev = { + .platform_data = &nhk8815_nand_data, + }, + .resource = nhk8815_nand_resources, + .num_resources = ARRAY_SIZE(nhk8815_nand_resources), +}; + static struct platform_device *nhk8815_platform_devices[] __initdata = { - /* currently empty, will add keypad, touchscreen etc */ + &nhk8815_nand_device, + /* will add keypad, touchscreen etc */ }; static void __init nhk8815_map_io(void) diff --git a/arch/arm/mach-nomadik/include/mach/fsmc.h b/arch/arm/mach-nomadik/include/mach/fsmc.h new file mode 100644 index 0000000..f81621c --- /dev/null +++ b/arch/arm/mach-nomadik/include/mach/fsmc.h @@ -0,0 +1,36 @@ + +/* Definitions for the Nomadik FSMC "Flexible Static Memory controller" */ + +#ifndef __ASM_ARCH_FSMC_H +#define __ASM_ARCH_FSMC_H + +#include +/* + * Register list + */ + +/* control and timing registers for CS0..CS3 */ +#define FSMC_BCR0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x00)) +#define FSMC_BTR0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x04)) +#define FSMC_BCR1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x08)) +#define FSMC_BTR1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x0c)) +#define FSMC_BCR2 ((void __iomem *)(NOMADIK_FSMC_VA + 0x10)) +#define FSMC_BTR2 ((void __iomem *)(NOMADIK_FSMC_VA + 0x14)) +#define FSMC_BCR3 ((void __iomem *)(NOMADIK_FSMC_VA + 0x18)) +#define FSMC_BTR3 ((void __iomem *)(NOMADIK_FSMC_VA + 0x1c)) + +/* pc-card and nand flash */ +#define FSMC_PCR0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x40)) +#define FSMC_PMEM0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x48)) +#define FSMC_PATT0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x4c)) +#define FSMC_PIO0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x50)) +#define FSMC_PECCR0 ((void __iomem *)(NOMADIK_FSMC_VA + 0x54)) + +#define FSMC_PCR1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x60)) +#define FSMC_PMEM1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x68)) +#define FSMC_PATT1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x6c)) +#define FSMC_PIO1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x70)) +#define FSMC_PECCR1 ((void __iomem *)(NOMADIK_FSMC_VA + 0x74)) + + +#endif /* __ASM_ARCH_FSMC_H */ diff --git a/arch/arm/mach-nomadik/include/mach/hardware.h b/arch/arm/mach-nomadik/include/mach/hardware.h index 8cdee9b..05ea93b 100644 --- a/arch/arm/mach-nomadik/include/mach/hardware.h +++ b/arch/arm/mach-nomadik/include/mach/hardware.h @@ -82,7 +82,8 @@ #define NOMADIK_HAMACA_DMEM 0xA0200000 /* HAMACA Data Memory Space */ -#define NOMADIK_MTU0_VA (IO_ADDRESS(NOMADIK_MTU0_BASE)) -#define NOMADIK_MTU1_VA (IO_ADDRESS(NOMADIK_MTU1_BASE)) +#define NOMADIK_FSMC_VA IO_ADDRESS(NOMADIK_FSMC_BASE) +#define NOMADIK_MTU0_VA IO_ADDRESS(NOMADIK_MTU0_BASE) +#define NOMADIK_MTU1_VA IO_ADDRESS(NOMADIK_MTU1_BASE) #endif /* __ASM_ARCH_HARDWARE_H */ diff --git a/arch/arm/mach-nomadik/include/mach/nand.h b/arch/arm/mach-nomadik/include/mach/nand.h new file mode 100644 index 0000000..c3c8254 --- /dev/null +++ b/arch/arm/mach-nomadik/include/mach/nand.h @@ -0,0 +1,16 @@ +#ifndef __ASM_ARCH_NAND_H +#define __ASM_ARCH_NAND_H + +struct nomadik_nand_platform_data { + struct mtd_partition *parts; + int nparts; + int options; + int (*init) (void); + int (*exit) (void); +}; + +#define NAND_IO_DATA 0x40000000 +#define NAND_IO_CMD 0x40800000 +#define NAND_IO_ADDR 0x41000000 + +#endif /* __ASM_ARCH_NAND_H */ diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 8b12e6e..41b4fc7 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -420,6 +420,12 @@ config MTD_NAND_MXC This enables the driver for the NAND flash controller on the MXC processors. +config MTD_NAND_NOMADIK + tristate "ST Nomadik 8815 NAND support" + depends on ARCH_NOMADIK + help + Driver for the NAND flash controller on the Nomadik, with ECC. + config MTD_NAND_SH_FLCTL tristate "Support for NAND on Renesas SuperH FLCTL" depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723 diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index b661586..06acb94 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -36,5 +36,6 @@ obj-$(CONFIG_MTD_NAND_FSL_ELBC) += fsl_elbc_nand.o obj-$(CONFIG_MTD_NAND_FSL_UPM) += fsl_upm.o obj-$(CONFIG_MTD_NAND_SH_FLCTL) += sh_flctl.o obj-$(CONFIG_MTD_NAND_MXC) += mxc_nand.o +obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o nand-objs := nand_base.o nand_bbt.o diff --git a/drivers/mtd/nand/nomadik_nand.c b/drivers/mtd/nand/nomadik_nand.c new file mode 100644 index 0000000..bbd1925 --- /dev/null +++ b/drivers/mtd/nand/nomadik_nand.c @@ -0,0 +1,329 @@ +/* + * drivers/mtd/nand/nomadik_nand.c + * + * Overview: + * Driver for on-board NAND flash on Nomadik Platforms + * + * Copyright (C) 2007 STMicroelectronics Pvt. Ltd. + * Author: Sachin Verma + * + * Copyright (C) 2009 Alessandro Rubini + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 +#include + +#include + +struct nomadik_nand_host { + struct mtd_info mtd; + struct nand_chip nand; + void __iomem *data_va; + void __iomem *cmd_va; + void __iomem *addr_va; + struct nand_bbt_descr *bbt_desc; +}; + +static inline int parity(int b) /* uses low 8 bits: returns 0 or all-1 */ +{ + b = b ^ (b >> 4); + b = b ^ (b >> 2); + return (b ^ (b >> 1)) & 1 + ? ~0 : 0; +} + +/* + * This is the ECC routine used in hardware, according to the manual. + * HW claims to make the calculation but not the correction. However, + * I haven't managed to get the desired data out of it; so do it in sw. + * There is problably some errata involved, but currently miss the info. + */ +static int nomadik_ecc512_calc(struct mtd_info *mtd, const u_char *data, + u_char *ecc) +{ + int gpar = 0; + int i, val, par; + int pbits = 0; /* P8, P16, ... P2048 */ + int pprime = 0; /* P8', P16', ... P2048' */ + int lowbits; /* P1, P2, P4 and primes */ + + for (i = 0; i < 512; i++) { + par = parity((val = data[i])); + gpar ^= val; + pbits ^= (i & par); + } + /* + * Ok, now gpar is global parity (xor of all bytes) + * pbits are all the parity bits (non-prime ones) + */ + par = parity(gpar); + pprime = pbits ^ par; + /* Put low bits in the right position for ecc[2] (bits 7..2) */ + lowbits = 0 + | (parity(gpar & 0xf0) & 0x80) /* P4 */ + | (parity(gpar & 0x0f) & 0x40) /* P4' */ + | (parity(gpar & 0xcc) & 0x20) /* P2 */ + | (parity(gpar & 0x33) & 0x10) /* P2' */ + | (parity(gpar & 0xaa) & 0x08) /* P1 */ + | (parity(gpar & 0x55) & 0x04); /* P1' */ + + ecc[2] = ~(lowbits | ((pbits & 0x100) >> 7) | ((pprime & 0x100) >> 8)); + /* now intermix bits for ecc[1] (P1024..P128') and ecc[0] (P64..P8') */ + ecc[1] = ~( (pbits & 0x80) >> 0 | ((pprime & 0x80) >> 1) + | ((pbits & 0x40) >> 1) | ((pprime & 0x40) >> 2) + | ((pbits & 0x20) >> 2) | ((pprime & 0x20) >> 3) + | ((pbits & 0x10) >> 3) | ((pprime & 0x10) >> 4)); + + ecc[0] = ~( (pbits & 0x8) << 4 | ((pprime & 0x8) << 3) + | ((pbits & 0x4) << 3) | ((pprime & 0x4) << 2) + | ((pbits & 0x2) << 2) | ((pprime & 0x2) << 1) + | ((pbits & 0x1) << 1) | ((pprime & 0x1) << 0)); + return 0; +} + +static int nomadik_ecc512_correct(struct mtd_info *mtd, uint8_t *dat, + uint8_t *r_ecc, uint8_t *c_ecc) +{ + struct nand_chip *chip = mtd->priv; + uint32_t r, c, d, diff; /*read, calculated, xor of them */ + + if (!memcmp(r_ecc, c_ecc, chip->ecc.bytes)) + return 0; + + /* Reorder the bytes into ascending-order 24 bits -- see manual */ + r = r_ecc[2] << 22 | r_ecc[1] << 14 | r_ecc[0] << 6 | r_ecc[2] >> 2; + c = c_ecc[2] << 22 | c_ecc[1] << 14 | c_ecc[0] << 6 | c_ecc[2] >> 2; + diff = (r ^ c) & ((1 << 24) - 1); /* use 24 bits only */ + + /* If 12 bits are different, one per pair, it's correctable */ + if (((diff | (diff>>1)) & 0x555555) == 0x555555) { + int bit = ((diff & 2) >> 1) + | ((diff & 0x8) >> 2) | ((diff & 0x20) >> 3); + int byte; + + d = diff >> 6; /* remove bit-order info */ + byte = ((d & 2) >> 1) + | ((d & 0x8) >> 2) | ((d & 0x20) >> 3) + | ((d & 0x80) >> 4) | ((d & 0x200) >> 5) + | ((d & 0x800) >> 6) | ((d & 0x2000) >> 7) + | ((d & 0x8000) >> 8) | ((d & 0x20000) >> 9); + /* correct the single bit */ + dat[byte] ^= 1 << bit; + return 0; + } + /* If 1 bit only differs, it's one bit error in ECC, ignore */ + if ((diff ^ (1 << (ffs(diff) - 1))) == 0) + return 0; + /* Otherwise, uncorrectable */ + return -1; +} + +static struct nand_ecclayout nomadik_ecc_layout = { + .eccbytes = 3 * 4, + .eccpos = { /* each subpage has 16 bytes: pos 2,3,4 hosts ECC */ + 0x02, 0x03, 0x04, + 0x12, 0x13, 0x14, + 0x22, 0x23, 0x24, + 0x32, 0x33, 0x34}, + /* let's keep bytes 5,6,7 for us, just in case we change ECC algo */ + .oobfree = { {0x08, 0x08}, {0x18, 0x08}, {0x28, 0x08}, {0x38, 0x08} }, +}; + +static void nomadik_ecc_control(struct mtd_info *mtd, int mode) +{ + /* No need to enable hw ecc, it's on by default */ +} + +static void nomadik_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) +{ + struct nand_chip *nand = mtd->priv; + struct nomadik_nand_host *host = nand->priv; + + if (cmd == NAND_CMD_NONE) + return; + + if (ctrl & NAND_CLE) + writeb(cmd, host->cmd_va); + else + writeb(cmd, host->addr_va); +} + +static int nomadik_nand_probe(struct platform_device *pdev) +{ + struct nomadik_nand_platform_data *pdata = pdev->dev.platform_data; + struct nomadik_nand_host *host; + struct mtd_info *mtd; + struct nand_chip *nand; + struct resource *res; + int ret = 0; + + /* Allocate memory for the device structure (and zero it) */ + host = kzalloc(sizeof(struct nomadik_nand_host), GFP_KERNEL); + if (!host) { + dev_err(&pdev->dev, "Failed to allocate device structure.\n"); + return -ENOMEM; + } + + /* Call the client's init function, if any */ + if (pdata->init && (ret = pdata->init()) < 0) { + dev_err(&pdev->dev, "Init function failed\n"); + goto err; + } + + /* ioremap three regions */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_addr"); + if (!res) {ret = -EIO; goto err_unmap; } + host->addr_va = ioremap(res->start, res->end - res->start + 1); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_data"); + if (!res) {ret = -EIO; goto err_unmap; } + host->data_va = ioremap(res->start, res->end - res->start + 1); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand_cmd"); + if (!res) {ret = -EIO; goto err_unmap; } + host->cmd_va = ioremap(res->start, res->end - res->start + 1); + + if (!host->addr_va || !host->data_va || !host->cmd_va) { + ret = -ENOMEM; + goto err_unmap; + } + + /* Link all private pointers */ + mtd = &host->mtd; + nand = &host->nand; + mtd->priv = nand; + nand->priv = host; + + host->mtd.owner = THIS_MODULE; + nand->IO_ADDR_R = host->data_va; + nand->IO_ADDR_W = host->data_va; + nand->cmd_ctrl = nomadik_cmd_ctrl; + + nand->ecc.mode = NAND_ECC_HW; + nand->ecc.layout = &nomadik_ecc_layout; + nand->ecc.calculate = nomadik_ecc512_calc; + nand->ecc.correct = nomadik_ecc512_correct; + nand->ecc.hwctl = nomadik_ecc_control; + nand->ecc.size = 512; + nand->ecc.bytes = 3; + + nand->options = pdata->options; + + /* + * Scan to find existance of the device + */ + if (nand_scan(&host->mtd, 1)) { + ret = -ENXIO; + goto err_unmap; + } + +#ifdef CONFIG_MTD_PARTITIONS + add_mtd_partitions(&host->mtd, pdata->parts, pdata->nparts); +#else + pr_info("Registering %s as whole device\n", mtd->name); + add_mtd_device(mtd); +#endif + + platform_set_drvdata(pdev, host); + return 0; + + err_unmap: + if (host->cmd_va) iounmap(host->cmd_va); + if (host->data_va) iounmap(host->data_va); + if (host->addr_va) iounmap(host->addr_va); + err: + kfree(host); + return ret; +} + +/* + * Clean up routine + */ +static int nomadik_nand_remove(struct platform_device *pdev) +{ + struct nomadik_nand_host *host = platform_get_drvdata(pdev); + struct nomadik_nand_platform_data *pdata = pdev->dev.platform_data; + + if (pdata->exit) + pdata->exit(); + + if (host) { + iounmap(host->cmd_va); + iounmap(host->data_va); + iounmap(host->addr_va); + kfree(host); + } + return 0; +} + +#ifdef CONFIG_PM +static int nomadik_nand_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct nomadik_nand_host *host = platform_get_drvdata(pdev); + int ret = 0; + if (host) + ret = host->mtd.suspend(&host->mtd); + return ret; +} + +static int nomadik_nand_resume(struct platform_device *pdev) +{ + struct nomadik_nand_host *host = platform_get_drvdata(pdev); + if (host) + host->mtd.resume(&host->mtd); + return 0; +} + +#else +#define nomadik_nand_suspend NULL +#define nomadik_nand_resume NULL +#endif /* CONFIG_PM */ + +static struct platform_driver nomadik_nand_driver = { + .probe = nomadik_nand_probe, + .remove = nomadik_nand_remove, + .driver = { + .owner = THIS_MODULE, + .name = "nomadik_nand", + }, + .suspend = nomadik_nand_suspend, + .resume = nomadik_nand_resume, +}; + +static int __init nand_nomadik_init(void) +{ + pr_info("Nomadik NAND driver\n"); + return platform_driver_register(&nomadik_nand_driver); +} + +static void __exit nand_nomadik_exit(void) +{ + platform_driver_unregister(&nomadik_nand_driver); +} + +module_init(nand_nomadik_init); +module_exit(nand_nomadik_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("ST Microelectronics (sachin.verma@st.com)"); +MODULE_DESCRIPTION("NAND driver for Nomadik Platform");