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>

1 files changed, 0 insertions, 423 deletions

diff --git a/drivers/mtd/nand/txx9ndfmc.c b/drivers/mtd/nand/txx9ndfmc.c
deleted file mode 100644
index b567d212fe7d..000000000000
--- a/drivers/mtd/nand/txx9ndfmc.c
+++ /dev/null
@@ -1,423 +0,0 @@
-/*
- * TXx9 NAND flash memory controller driver
- * Based on RBTX49xx patch from CELF patch archive.
- *
- * 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.
- *
- * (C) Copyright TOSHIBA CORPORATION 2004-2007
- * All Rights Reserved.
- */
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/platform_device.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/io.h>
-#include <asm/txx9/ndfmc.h>
-
-/* TXX9 NDFMC Registers */
-#define TXX9_NDFDTR	0x00
-#define TXX9_NDFMCR	0x04
-#define TXX9_NDFSR	0x08
-#define TXX9_NDFISR	0x0c
-#define TXX9_NDFIMR	0x10
-#define TXX9_NDFSPR	0x14
-#define TXX9_NDFRSTR	0x18	/* not TX4939 */
-
-/* NDFMCR : NDFMC Mode Control */
-#define TXX9_NDFMCR_WE	0x80
-#define TXX9_NDFMCR_ECC_ALL	0x60
-#define TXX9_NDFMCR_ECC_RESET	0x60
-#define TXX9_NDFMCR_ECC_READ	0x40
-#define TXX9_NDFMCR_ECC_ON	0x20
-#define TXX9_NDFMCR_ECC_OFF	0x00
-#define TXX9_NDFMCR_CE	0x10
-#define TXX9_NDFMCR_BSPRT	0x04	/* TX4925/TX4926 only */
-#define TXX9_NDFMCR_ALE	0x02
-#define TXX9_NDFMCR_CLE	0x01
-/* TX4939 only */
-#define TXX9_NDFMCR_X16	0x0400
-#define TXX9_NDFMCR_DMAREQ_MASK	0x0300
-#define TXX9_NDFMCR_DMAREQ_NODMA	0x0000
-#define TXX9_NDFMCR_DMAREQ_128	0x0100
-#define TXX9_NDFMCR_DMAREQ_256	0x0200
-#define TXX9_NDFMCR_DMAREQ_512	0x0300
-#define TXX9_NDFMCR_CS_MASK	0x0c
-#define TXX9_NDFMCR_CS(ch)	((ch) << 2)
-
-/* NDFMCR : NDFMC Status */
-#define TXX9_NDFSR_BUSY	0x80
-/* TX4939 only */
-#define TXX9_NDFSR_DMARUN	0x40
-
-/* NDFMCR : NDFMC Reset */
-#define TXX9_NDFRSTR_RST	0x01
-
-struct txx9ndfmc_priv {
-	struct platform_device *dev;
-	struct nand_chip chip;
-	int cs;
-	const char *mtdname;
-};
-
-#define MAX_TXX9NDFMC_DEV	4
-struct txx9ndfmc_drvdata {
-	struct mtd_info *mtds[MAX_TXX9NDFMC_DEV];
-	void __iomem *base;
-	unsigned char hold;	/* in gbusclock */
-	unsigned char spw;	/* in gbusclock */
-	struct nand_hw_control hw_control;
-};
-
-static struct platform_device *mtd_to_platdev(struct mtd_info *mtd)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct txx9ndfmc_priv *txx9_priv = nand_get_controller_data(chip);
-	return txx9_priv->dev;
-}
-
-static void __iomem *ndregaddr(struct platform_device *dev, unsigned int reg)
-{
-	struct txx9ndfmc_drvdata *drvdata = platform_get_drvdata(dev);
-	struct txx9ndfmc_platform_data *plat = dev_get_platdata(&dev->dev);
-
-	return drvdata->base + (reg << plat->shift);
-}
-
-static u32 txx9ndfmc_read(struct platform_device *dev, unsigned int reg)
-{
-	return __raw_readl(ndregaddr(dev, reg));
-}
-
-static void txx9ndfmc_write(struct platform_device *dev,
-			    u32 val, unsigned int reg)
-{
-	__raw_writel(val, ndregaddr(dev, reg));
-}
-
-static uint8_t txx9ndfmc_read_byte(struct mtd_info *mtd)
-{
-	struct platform_device *dev = mtd_to_platdev(mtd);
-
-	return txx9ndfmc_read(dev, TXX9_NDFDTR);
-}
-
-static void txx9ndfmc_write_buf(struct mtd_info *mtd, const uint8_t *buf,
-				int len)
-{
-	struct platform_device *dev = mtd_to_platdev(mtd);
-	void __iomem *ndfdtr = ndregaddr(dev, TXX9_NDFDTR);
-	u32 mcr = txx9ndfmc_read(dev, TXX9_NDFMCR);
-
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_WE, TXX9_NDFMCR);
-	while (len--)
-		__raw_writel(*buf++, ndfdtr);
-	txx9ndfmc_write(dev, mcr, TXX9_NDFMCR);
-}
-
-static void txx9ndfmc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
-{
-	struct platform_device *dev = mtd_to_platdev(mtd);
-	void __iomem *ndfdtr = ndregaddr(dev, TXX9_NDFDTR);
-
-	while (len--)
-		*buf++ = __raw_readl(ndfdtr);
-}
-
-static void txx9ndfmc_cmd_ctrl(struct mtd_info *mtd, int cmd,
-			       unsigned int ctrl)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct txx9ndfmc_priv *txx9_priv = nand_get_controller_data(chip);
-	struct platform_device *dev = txx9_priv->dev;
-	struct txx9ndfmc_platform_data *plat = dev_get_platdata(&dev->dev);
-
-	if (ctrl & NAND_CTRL_CHANGE) {
-		u32 mcr = txx9ndfmc_read(dev, TXX9_NDFMCR);
-
-		mcr &= ~(TXX9_NDFMCR_CLE | TXX9_NDFMCR_ALE | TXX9_NDFMCR_CE);
-		mcr |= ctrl & NAND_CLE ? TXX9_NDFMCR_CLE : 0;
-		mcr |= ctrl & NAND_ALE ? TXX9_NDFMCR_ALE : 0;
-		/* TXX9_NDFMCR_CE bit is 0:high 1:low */
-		mcr |= ctrl & NAND_NCE ? TXX9_NDFMCR_CE : 0;
-		if (txx9_priv->cs >= 0 && (ctrl & NAND_NCE)) {
-			mcr &= ~TXX9_NDFMCR_CS_MASK;
-			mcr |= TXX9_NDFMCR_CS(txx9_priv->cs);
-		}
-		txx9ndfmc_write(dev, mcr, TXX9_NDFMCR);
-	}
-	if (cmd != NAND_CMD_NONE)
-		txx9ndfmc_write(dev, cmd & 0xff, TXX9_NDFDTR);
-	if (plat->flags & NDFMC_PLAT_FLAG_DUMMYWRITE) {
-		/* dummy write to update external latch */
-		if ((ctrl & NAND_CTRL_CHANGE) && cmd == NAND_CMD_NONE)
-			txx9ndfmc_write(dev, 0, TXX9_NDFDTR);
-	}
-	mmiowb();
-}
-
-static int txx9ndfmc_dev_ready(struct mtd_info *mtd)
-{
-	struct platform_device *dev = mtd_to_platdev(mtd);
-
-	return !(txx9ndfmc_read(dev, TXX9_NDFSR) & TXX9_NDFSR_BUSY);
-}
-
-static int txx9ndfmc_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat,
-				   uint8_t *ecc_code)
-{
-	struct platform_device *dev = mtd_to_platdev(mtd);
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	int eccbytes;
-	u32 mcr = txx9ndfmc_read(dev, TXX9_NDFMCR);
-
-	mcr &= ~TXX9_NDFMCR_ECC_ALL;
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_ECC_OFF, TXX9_NDFMCR);
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_ECC_READ, TXX9_NDFMCR);
-	for (eccbytes = chip->ecc.bytes; eccbytes > 0; eccbytes -= 3) {
-		ecc_code[1] = txx9ndfmc_read(dev, TXX9_NDFDTR);
-		ecc_code[0] = txx9ndfmc_read(dev, TXX9_NDFDTR);
-		ecc_code[2] = txx9ndfmc_read(dev, TXX9_NDFDTR);
-		ecc_code += 3;
-	}
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_ECC_OFF, TXX9_NDFMCR);
-	return 0;
-}
-
-static int txx9ndfmc_correct_data(struct mtd_info *mtd, unsigned char *buf,
-		unsigned char *read_ecc, unsigned char *calc_ecc)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	int eccsize;
-	int corrected = 0;
-	int stat;
-
-	for (eccsize = chip->ecc.size; eccsize > 0; eccsize -= 256) {
-		stat = __nand_correct_data(buf, read_ecc, calc_ecc, 256);
-		if (stat < 0)
-			return stat;
-		corrected += stat;
-		buf += 256;
-		read_ecc += 3;
-		calc_ecc += 3;
-	}
-	return corrected;
-}
-
-static void txx9ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
-{
-	struct platform_device *dev = mtd_to_platdev(mtd);
-	u32 mcr = txx9ndfmc_read(dev, TXX9_NDFMCR);
-
-	mcr &= ~TXX9_NDFMCR_ECC_ALL;
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_ECC_RESET, TXX9_NDFMCR);
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_ECC_OFF, TXX9_NDFMCR);
-	txx9ndfmc_write(dev, mcr | TXX9_NDFMCR_ECC_ON, TXX9_NDFMCR);
-}
-
-static void txx9ndfmc_initialize(struct platform_device *dev)
-{
-	struct txx9ndfmc_platform_data *plat = dev_get_platdata(&dev->dev);
-	struct txx9ndfmc_drvdata *drvdata = platform_get_drvdata(dev);
-	int tmout = 100;
-
-	if (plat->flags & NDFMC_PLAT_FLAG_NO_RSTR)
-		; /* no NDFRSTR.  Write to NDFSPR resets the NDFMC. */
-	else {
-		/* reset NDFMC */
-		txx9ndfmc_write(dev,
-				txx9ndfmc_read(dev, TXX9_NDFRSTR) |
-				TXX9_NDFRSTR_RST,
-				TXX9_NDFRSTR);
-		while (txx9ndfmc_read(dev, TXX9_NDFRSTR) & TXX9_NDFRSTR_RST) {
-			if (--tmout == 0) {
-				dev_err(&dev->dev, "reset failed.\n");
-				break;
-			}
-			udelay(1);
-		}
-	}
-	/* setup Hold Time, Strobe Pulse Width */
-	txx9ndfmc_write(dev, (drvdata->hold << 4) | drvdata->spw, TXX9_NDFSPR);
-	txx9ndfmc_write(dev,
-			(plat->flags & NDFMC_PLAT_FLAG_USE_BSPRT) ?
-			TXX9_NDFMCR_BSPRT : 0, TXX9_NDFMCR);
-}
-
-#define TXX9NDFMC_NS_TO_CYC(gbusclk, ns) \
-	DIV_ROUND_UP((ns) * DIV_ROUND_UP(gbusclk, 1000), 1000000)
-
-static int txx9ndfmc_nand_scan(struct mtd_info *mtd)
-{
-	struct nand_chip *chip = mtd_to_nand(mtd);
-	int ret;
-
-	ret = nand_scan_ident(mtd, 1, NULL);
-	if (!ret) {
-		if (mtd->writesize >= 512) {
-			/* Hardware ECC 6 byte ECC per 512 Byte data */
-			chip->ecc.size = 512;
-			chip->ecc.bytes = 6;
-		}
-		ret = nand_scan_tail(mtd);
-	}
-	return ret;
-}
-
-static int __init txx9ndfmc_probe(struct platform_device *dev)
-{
-	struct txx9ndfmc_platform_data *plat = dev_get_platdata(&dev->dev);
-	int hold, spw;
-	int i;
-	struct txx9ndfmc_drvdata *drvdata;
-	unsigned long gbusclk = plat->gbus_clock;
-	struct resource *res;
-
-	drvdata = devm_kzalloc(&dev->dev, sizeof(*drvdata), GFP_KERNEL);
-	if (!drvdata)
-		return -ENOMEM;
-	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	drvdata->base = devm_ioremap_resource(&dev->dev, res);
-	if (IS_ERR(drvdata->base))
-		return PTR_ERR(drvdata->base);
-
-	hold = plat->hold ?: 20; /* tDH */
-	spw = plat->spw ?: 90; /* max(tREADID, tWP, tRP) */
-
-	hold = TXX9NDFMC_NS_TO_CYC(gbusclk, hold);
-	spw = TXX9NDFMC_NS_TO_CYC(gbusclk, spw);
-	if (plat->flags & NDFMC_PLAT_FLAG_HOLDADD)
-		hold -= 2;	/* actual hold time : (HOLD + 2) BUSCLK */
-	spw -= 1;	/* actual wait time : (SPW + 1) BUSCLK */
-	hold = clamp(hold, 1, 15);
-	drvdata->hold = hold;
-	spw = clamp(spw, 1, 15);
-	drvdata->spw = spw;
-	dev_info(&dev->dev, "CLK:%ldMHz HOLD:%d SPW:%d\n",
-		 (gbusclk + 500000) / 1000000, hold, spw);
-
-	nand_hw_control_init(&drvdata->hw_control);
-
-	platform_set_drvdata(dev, drvdata);
-	txx9ndfmc_initialize(dev);
-
-	for (i = 0; i < MAX_TXX9NDFMC_DEV; i++) {
-		struct txx9ndfmc_priv *txx9_priv;
-		struct nand_chip *chip;
-		struct mtd_info *mtd;
-
-		if (!(plat->ch_mask & (1 << i)))
-			continue;
-		txx9_priv = kzalloc(sizeof(struct txx9ndfmc_priv),
-				    GFP_KERNEL);
-		if (!txx9_priv)
-			continue;
-		chip = &txx9_priv->chip;
-		mtd = nand_to_mtd(chip);
-		mtd->dev.parent = &dev->dev;
-
-		chip->read_byte = txx9ndfmc_read_byte;
-		chip->read_buf = txx9ndfmc_read_buf;
-		chip->write_buf = txx9ndfmc_write_buf;
-		chip->cmd_ctrl = txx9ndfmc_cmd_ctrl;
-		chip->dev_ready = txx9ndfmc_dev_ready;
-		chip->ecc.calculate = txx9ndfmc_calculate_ecc;
-		chip->ecc.correct = txx9ndfmc_correct_data;
-		chip->ecc.hwctl = txx9ndfmc_enable_hwecc;
-		chip->ecc.mode = NAND_ECC_HW;
-		/* txx9ndfmc_nand_scan will overwrite ecc.size and ecc.bytes */
-		chip->ecc.size = 256;
-		chip->ecc.bytes = 3;
-		chip->ecc.strength = 1;
-		chip->chip_delay = 100;
-		chip->controller = &drvdata->hw_control;
-
-		nand_set_controller_data(chip, txx9_priv);
-		txx9_priv->dev = dev;
-
-		if (plat->ch_mask != 1) {
-			txx9_priv->cs = i;
-			txx9_priv->mtdname = kasprintf(GFP_KERNEL, "%s.%u",
-						       dev_name(&dev->dev), i);
-		} else {
-			txx9_priv->cs = -1;
-			txx9_priv->mtdname = kstrdup(dev_name(&dev->dev),
-						     GFP_KERNEL);
-		}
-		if (!txx9_priv->mtdname) {
-			kfree(txx9_priv);
-			dev_err(&dev->dev, "Unable to allocate MTD name.\n");
-			continue;
-		}
-		if (plat->wide_mask & (1 << i))
-			chip->options |= NAND_BUSWIDTH_16;
-
-		if (txx9ndfmc_nand_scan(mtd)) {
-			kfree(txx9_priv->mtdname);
-			kfree(txx9_priv);
-			continue;
-		}
-		mtd->name = txx9_priv->mtdname;
-
-		mtd_device_parse_register(mtd, NULL, NULL, NULL, 0);
-		drvdata->mtds[i] = mtd;
-	}
-
-	return 0;
-}
-
-static int __exit txx9ndfmc_remove(struct platform_device *dev)
-{
-	struct txx9ndfmc_drvdata *drvdata = platform_get_drvdata(dev);
-	int i;
-
-	if (!drvdata)
-		return 0;
-	for (i = 0; i < MAX_TXX9NDFMC_DEV; i++) {
-		struct mtd_info *mtd = drvdata->mtds[i];
-		struct nand_chip *chip;
-		struct txx9ndfmc_priv *txx9_priv;
-
-		if (!mtd)
-			continue;
-		chip = mtd_to_nand(mtd);
-		txx9_priv = nand_get_controller_data(chip);
-
-		nand_release(mtd);
-		kfree(txx9_priv->mtdname);
-		kfree(txx9_priv);
-	}
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int txx9ndfmc_resume(struct platform_device *dev)
-{
-	if (platform_get_drvdata(dev))
-		txx9ndfmc_initialize(dev);
-	return 0;
-}
-#else
-#define txx9ndfmc_resume NULL
-#endif
-
-static struct platform_driver txx9ndfmc_driver = {
-	.remove		= __exit_p(txx9ndfmc_remove),
-	.resume		= txx9ndfmc_resume,
-	.driver		= {
-		.name	= "txx9ndfmc",
-	},
-};
-
-module_platform_driver_probe(txx9ndfmc_driver, txx9ndfmc_probe);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("TXx9 SoC NAND flash controller driver");
-MODULE_ALIAS("platform:txx9ndfmc");