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author | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-02-05 23:02:04 +0100 |
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committer | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-02-16 10:09:34 +0100 |
commit | 93db446a424cee9387b532995e6b516667079555 (patch) | |
tree | 39c7900ae38d890fb971ea5fc6f194f7e66fa797 /drivers/mtd/nand/sharpsl.c | |
parent | mtd: nand: Add missing copyright information (diff) | |
download | linux-93db446a424cee9387b532995e6b516667079555.tar.xz linux-93db446a424cee9387b532995e6b516667079555.zip |
mtd: nand: move raw NAND related code to the raw/ subdir
As part of the process of sharing more code between different NAND
based devices, we need to move all raw NAND related code to the raw/
subdirectory.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Diffstat (limited to 'drivers/mtd/nand/sharpsl.c')
-rw-r--r-- | drivers/mtd/nand/sharpsl.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c deleted file mode 100644 index e93df02c825e..000000000000 --- a/drivers/mtd/nand/sharpsl.c +++ /dev/null @@ -1,233 +0,0 @@ -/* - * Copyright (C) 2004 Richard Purdie - * Copyright (C) 2008 Dmitry Baryshkov - * - * Based on Sharp's NAND driver sharp_sl.c - * - * 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. - * - */ - -#include <linux/genhd.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/rawnand.h> -#include <linux/mtd/nand_ecc.h> -#include <linux/mtd/partitions.h> -#include <linux/mtd/sharpsl.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> - -#include <asm/io.h> -#include <mach/hardware.h> -#include <asm/mach-types.h> - -struct sharpsl_nand { - struct nand_chip chip; - - void __iomem *io; -}; - -static inline struct sharpsl_nand *mtd_to_sharpsl(struct mtd_info *mtd) -{ - return container_of(mtd_to_nand(mtd), struct sharpsl_nand, chip); -} - -/* register offset */ -#define ECCLPLB 0x00 /* line parity 7 - 0 bit */ -#define ECCLPUB 0x04 /* line parity 15 - 8 bit */ -#define ECCCP 0x08 /* column parity 5 - 0 bit */ -#define ECCCNTR 0x0C /* ECC byte counter */ -#define ECCCLRR 0x10 /* cleare ECC */ -#define FLASHIO 0x14 /* Flash I/O */ -#define FLASHCTL 0x18 /* Flash Control */ - -/* Flash control bit */ -#define FLRYBY (1 << 5) -#define FLCE1 (1 << 4) -#define FLWP (1 << 3) -#define FLALE (1 << 2) -#define FLCLE (1 << 1) -#define FLCE0 (1 << 0) - -/* - * hardware specific access to control-lines - * ctrl: - * NAND_CNE: bit 0 -> ! bit 0 & 4 - * NAND_CLE: bit 1 -> bit 1 - * NAND_ALE: bit 2 -> bit 2 - * - */ -static void sharpsl_nand_hwcontrol(struct mtd_info *mtd, int cmd, - unsigned int ctrl) -{ - struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); - struct nand_chip *chip = mtd_to_nand(mtd); - - if (ctrl & NAND_CTRL_CHANGE) { - unsigned char bits = ctrl & 0x07; - - bits |= (ctrl & 0x01) << 4; - - bits ^= 0x11; - - writeb((readb(sharpsl->io + FLASHCTL) & ~0x17) | bits, sharpsl->io + FLASHCTL); - } - - if (cmd != NAND_CMD_NONE) - writeb(cmd, chip->IO_ADDR_W); -} - -static int sharpsl_nand_dev_ready(struct mtd_info *mtd) -{ - struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); - return !((readb(sharpsl->io + FLASHCTL) & FLRYBY) == 0); -} - -static void sharpsl_nand_enable_hwecc(struct mtd_info *mtd, int mode) -{ - struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); - writeb(0, sharpsl->io + ECCCLRR); -} - -static int sharpsl_nand_calculate_ecc(struct mtd_info *mtd, const u_char * dat, u_char * ecc_code) -{ - struct sharpsl_nand *sharpsl = mtd_to_sharpsl(mtd); - ecc_code[0] = ~readb(sharpsl->io + ECCLPUB); - ecc_code[1] = ~readb(sharpsl->io + ECCLPLB); - ecc_code[2] = (~readb(sharpsl->io + ECCCP) << 2) | 0x03; - return readb(sharpsl->io + ECCCNTR) != 0; -} - -/* - * Main initialization routine - */ -static int sharpsl_nand_probe(struct platform_device *pdev) -{ - struct nand_chip *this; - struct mtd_info *mtd; - struct resource *r; - int err = 0; - struct sharpsl_nand *sharpsl; - struct sharpsl_nand_platform_data *data = dev_get_platdata(&pdev->dev); - - if (!data) { - dev_err(&pdev->dev, "no platform data!\n"); - return -EINVAL; - } - - /* Allocate memory for MTD device structure and private data */ - sharpsl = kzalloc(sizeof(struct sharpsl_nand), GFP_KERNEL); - if (!sharpsl) - return -ENOMEM; - - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!r) { - dev_err(&pdev->dev, "no io memory resource defined!\n"); - err = -ENODEV; - goto err_get_res; - } - - /* map physical address */ - sharpsl->io = ioremap(r->start, resource_size(r)); - if (!sharpsl->io) { - dev_err(&pdev->dev, "ioremap to access Sharp SL NAND chip failed\n"); - err = -EIO; - goto err_ioremap; - } - - /* Get pointer to private data */ - this = (struct nand_chip *)(&sharpsl->chip); - - /* Link the private data with the MTD structure */ - mtd = nand_to_mtd(this); - mtd->dev.parent = &pdev->dev; - mtd_set_ooblayout(mtd, data->ecc_layout); - - platform_set_drvdata(pdev, sharpsl); - - /* - * PXA initialize - */ - writeb(readb(sharpsl->io + FLASHCTL) | FLWP, sharpsl->io + FLASHCTL); - - /* Set address of NAND IO lines */ - this->IO_ADDR_R = sharpsl->io + FLASHIO; - this->IO_ADDR_W = sharpsl->io + FLASHIO; - /* Set address of hardware control function */ - this->cmd_ctrl = sharpsl_nand_hwcontrol; - this->dev_ready = sharpsl_nand_dev_ready; - /* 15 us command delay time */ - this->chip_delay = 15; - /* set eccmode using hardware ECC */ - this->ecc.mode = NAND_ECC_HW; - this->ecc.size = 256; - this->ecc.bytes = 3; - this->ecc.strength = 1; - this->badblock_pattern = data->badblock_pattern; - this->ecc.hwctl = sharpsl_nand_enable_hwecc; - this->ecc.calculate = sharpsl_nand_calculate_ecc; - this->ecc.correct = nand_correct_data; - - /* Scan to find existence of the device */ - err = nand_scan(mtd, 1); - if (err) - goto err_scan; - - /* Register the partitions */ - mtd->name = "sharpsl-nand"; - - err = mtd_device_parse_register(mtd, data->part_parsers, NULL, - data->partitions, data->nr_partitions); - if (err) - goto err_add; - - /* Return happy */ - return 0; - -err_add: - nand_release(mtd); - -err_scan: - iounmap(sharpsl->io); -err_ioremap: -err_get_res: - kfree(sharpsl); - return err; -} - -/* - * Clean up routine - */ -static int sharpsl_nand_remove(struct platform_device *pdev) -{ - struct sharpsl_nand *sharpsl = platform_get_drvdata(pdev); - - /* Release resources, unregister device */ - nand_release(nand_to_mtd(&sharpsl->chip)); - - iounmap(sharpsl->io); - - /* Free the MTD device structure */ - kfree(sharpsl); - - return 0; -} - -static struct platform_driver sharpsl_nand_driver = { - .driver = { - .name = "sharpsl-nand", - }, - .probe = sharpsl_nand_probe, - .remove = sharpsl_nand_remove, -}; - -module_platform_driver(sharpsl_nand_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>"); -MODULE_DESCRIPTION("Device specific logic for NAND flash on Sharp SL-C7xx Series"); |