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authorBoris Brezillon <boris.brezillon@bootlin.com>2018-02-05 23:02:04 +0100
committerBoris Brezillon <boris.brezillon@bootlin.com>2018-02-16 10:09:34 +0100
commit93db446a424cee9387b532995e6b516667079555 (patch)
tree39c7900ae38d890fb971ea5fc6f194f7e66fa797 /drivers/mtd/nand/sharpsl.c
parentmtd: nand: Add missing copyright information (diff)
downloadlinux-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.c233
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");