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, 513 deletions

diff --git a/drivers/mtd/nand/tmio_nand.c b/drivers/mtd/nand/tmio_nand.c
deleted file mode 100644
index dcaa924502de..000000000000
--- a/drivers/mtd/nand/tmio_nand.c
+++ /dev/null
@@ -1,513 +0,0 @@
-/*
- * Toshiba TMIO NAND flash controller driver
- *
- * Slightly murky pre-git history of the driver:
- *
- * Copyright (c) Ian Molton 2004, 2005, 2008
- *    Original work, independent of sharps code. Included hardware ECC support.
- *    Hard ECC did not work for writes in the early revisions.
- * Copyright (c) Dirk Opfer 2005.
- *    Modifications developed from sharps code but
- *    NOT containing any, ported onto Ians base.
- * Copyright (c) Chris Humbert 2005
- * Copyright (c) Dmitry Baryshkov 2008
- *    Minor fixes
- *
- * Parts copyright Sebastian Carlier
- *
- * This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- */
-
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/mfd/core.h>
-#include <linux/mfd/tmio.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/rawnand.h>
-#include <linux/mtd/nand_ecc.h>
-#include <linux/mtd/partitions.h>
-#include <linux/slab.h>
-
-/*--------------------------------------------------------------------------*/
-
-/*
- * NAND Flash Host Controller Configuration Register
- */
-#define CCR_COMMAND	0x04	/* w Command				*/
-#define CCR_BASE	0x10	/* l NAND Flash Control Reg Base Addr	*/
-#define CCR_INTP	0x3d	/* b Interrupt Pin			*/
-#define CCR_INTE	0x48	/* b Interrupt Enable			*/
-#define CCR_EC		0x4a	/* b Event Control			*/
-#define CCR_ICC		0x4c	/* b Internal Clock Control		*/
-#define CCR_ECCC	0x5b	/* b ECC Control			*/
-#define CCR_NFTC	0x60	/* b NAND Flash Transaction Control	*/
-#define CCR_NFM		0x61	/* b NAND Flash Monitor			*/
-#define CCR_NFPSC	0x62	/* b NAND Flash Power Supply Control	*/
-#define CCR_NFDC	0x63	/* b NAND Flash Detect Control		*/
-
-/*
- * NAND Flash Control Register
- */
-#define FCR_DATA	0x00	/* bwl Data Register			*/
-#define FCR_MODE	0x04	/* b Mode Register			*/
-#define FCR_STATUS	0x05	/* b Status Register			*/
-#define FCR_ISR		0x06	/* b Interrupt Status Register		*/
-#define FCR_IMR		0x07	/* b Interrupt Mask Register		*/
-
-/* FCR_MODE Register Command List */
-#define FCR_MODE_DATA	0x94	/* Data Data_Mode */
-#define FCR_MODE_COMMAND 0x95	/* Data Command_Mode */
-#define FCR_MODE_ADDRESS 0x96	/* Data Address_Mode */
-
-#define FCR_MODE_HWECC_CALC	0xB4	/* HW-ECC Data */
-#define FCR_MODE_HWECC_RESULT	0xD4	/* HW-ECC Calc result Read_Mode */
-#define FCR_MODE_HWECC_RESET	0xF4	/* HW-ECC Reset */
-
-#define FCR_MODE_POWER_ON	0x0C	/* Power Supply ON  to SSFDC card */
-#define FCR_MODE_POWER_OFF	0x08	/* Power Supply OFF to SSFDC card */
-
-#define FCR_MODE_LED_OFF	0x00	/* LED OFF */
-#define FCR_MODE_LED_ON		0x04	/* LED ON */
-
-#define FCR_MODE_EJECT_ON	0x68	/* Ejection events active  */
-#define FCR_MODE_EJECT_OFF	0x08	/* Ejection events ignored */
-
-#define FCR_MODE_LOCK		0x6C	/* Lock_Mode. Eject Switch Invalid */
-#define FCR_MODE_UNLOCK		0x0C	/* UnLock_Mode. Eject Switch is valid */
-
-#define FCR_MODE_CONTROLLER_ID	0x40	/* Controller ID Read */
-#define FCR_MODE_STANDBY	0x00	/* SSFDC card Changes Standby State */
-
-#define FCR_MODE_WE		0x80
-#define FCR_MODE_ECC1		0x40
-#define FCR_MODE_ECC0		0x20
-#define FCR_MODE_CE		0x10
-#define FCR_MODE_PCNT1		0x08
-#define FCR_MODE_PCNT0		0x04
-#define FCR_MODE_ALE		0x02
-#define FCR_MODE_CLE		0x01
-
-#define FCR_STATUS_BUSY		0x80
-
-/*--------------------------------------------------------------------------*/
-
-struct tmio_nand {
-	struct nand_chip chip;
-
-	struct platform_device *dev;
-
-	void __iomem *ccr;
-	void __iomem *fcr;
-	unsigned long fcr_base;
-
-	unsigned int irq;
-
-	/* for tmio_nand_read_byte */
-	u8			read;
-	unsigned read_good:1;
-};
-
-static inline struct tmio_nand *mtd_to_tmio(struct mtd_info *mtd)
-{
-	return container_of(mtd_to_nand(mtd), struct tmio_nand, chip);
-}
-
-
-/*--------------------------------------------------------------------------*/
-
-static void tmio_nand_hwcontrol(struct mtd_info *mtd, int cmd,
-				   unsigned int ctrl)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-	struct nand_chip *chip = mtd_to_nand(mtd);
-
-	if (ctrl & NAND_CTRL_CHANGE) {
-		u8 mode;
-
-		if (ctrl & NAND_NCE) {
-			mode = FCR_MODE_DATA;
-
-			if (ctrl & NAND_CLE)
-				mode |=  FCR_MODE_CLE;
-			else
-				mode &= ~FCR_MODE_CLE;
-
-			if (ctrl & NAND_ALE)
-				mode |=  FCR_MODE_ALE;
-			else
-				mode &= ~FCR_MODE_ALE;
-		} else {
-			mode = FCR_MODE_STANDBY;
-		}
-
-		tmio_iowrite8(mode, tmio->fcr + FCR_MODE);
-		tmio->read_good = 0;
-	}
-
-	if (cmd != NAND_CMD_NONE)
-		tmio_iowrite8(cmd, chip->IO_ADDR_W);
-}
-
-static int tmio_nand_dev_ready(struct mtd_info *mtd)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-
-	return !(tmio_ioread8(tmio->fcr + FCR_STATUS) & FCR_STATUS_BUSY);
-}
-
-static irqreturn_t tmio_irq(int irq, void *__tmio)
-{
-	struct tmio_nand *tmio = __tmio;
-	struct nand_chip *nand_chip = &tmio->chip;
-
-	/* disable RDYREQ interrupt */
-	tmio_iowrite8(0x00, tmio->fcr + FCR_IMR);
-
-	if (unlikely(!waitqueue_active(&nand_chip->controller->wq)))
-		dev_warn(&tmio->dev->dev, "spurious interrupt\n");
-
-	wake_up(&nand_chip->controller->wq);
-	return IRQ_HANDLED;
-}
-
-/*
-  *The TMIO core has a RDYREQ interrupt on the posedge of #SMRB.
-  *This interrupt is normally disabled, but for long operations like
-  *erase and write, we enable it to wake us up.  The irq handler
-  *disables the interrupt.
- */
-static int
-tmio_nand_wait(struct mtd_info *mtd, struct nand_chip *nand_chip)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-	long timeout;
-	u8 status;
-
-	/* enable RDYREQ interrupt */
-	tmio_iowrite8(0x0f, tmio->fcr + FCR_ISR);
-	tmio_iowrite8(0x81, tmio->fcr + FCR_IMR);
-
-	timeout = wait_event_timeout(nand_chip->controller->wq,
-		tmio_nand_dev_ready(mtd),
-		msecs_to_jiffies(nand_chip->state == FL_ERASING ? 400 : 20));
-
-	if (unlikely(!tmio_nand_dev_ready(mtd))) {
-		tmio_iowrite8(0x00, tmio->fcr + FCR_IMR);
-		dev_warn(&tmio->dev->dev, "still busy with %s after %d ms\n",
-			nand_chip->state == FL_ERASING ? "erase" : "program",
-			nand_chip->state == FL_ERASING ? 400 : 20);
-
-	} else if (unlikely(!timeout)) {
-		tmio_iowrite8(0x00, tmio->fcr + FCR_IMR);
-		dev_warn(&tmio->dev->dev, "timeout waiting for interrupt\n");
-	}
-
-	nand_status_op(nand_chip, &status);
-	return status;
-}
-
-/*
-  *The TMIO controller combines two 8-bit data bytes into one 16-bit
-  *word. This function separates them so nand_base.c works as expected,
-  *especially its NAND_CMD_READID routines.
- *
-  *To prevent stale data from being read, tmio_nand_hwcontrol() clears
-  *tmio->read_good.
- */
-static u_char tmio_nand_read_byte(struct mtd_info *mtd)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-	unsigned int data;
-
-	if (tmio->read_good--)
-		return tmio->read;
-
-	data = tmio_ioread16(tmio->fcr + FCR_DATA);
-	tmio->read = data >> 8;
-	return data;
-}
-
-/*
-  *The TMIO controller converts an 8-bit NAND interface to a 16-bit
-  *bus interface, so all data reads and writes must be 16-bit wide.
-  *Thus, we implement 16-bit versions of the read, write, and verify
-  *buffer functions.
- */
-static void
-tmio_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-
-	tmio_iowrite16_rep(tmio->fcr + FCR_DATA, buf, len >> 1);
-}
-
-static void tmio_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-
-	tmio_ioread16_rep(tmio->fcr + FCR_DATA, buf, len >> 1);
-}
-
-static void tmio_nand_enable_hwecc(struct mtd_info *mtd, int mode)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-
-	tmio_iowrite8(FCR_MODE_HWECC_RESET, tmio->fcr + FCR_MODE);
-	tmio_ioread8(tmio->fcr + FCR_DATA);	/* dummy read */
-	tmio_iowrite8(FCR_MODE_HWECC_CALC, tmio->fcr + FCR_MODE);
-}
-
-static int tmio_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
-							u_char *ecc_code)
-{
-	struct tmio_nand *tmio = mtd_to_tmio(mtd);
-	unsigned int ecc;
-
-	tmio_iowrite8(FCR_MODE_HWECC_RESULT, tmio->fcr + FCR_MODE);
-
-	ecc = tmio_ioread16(tmio->fcr + FCR_DATA);
-	ecc_code[1] = ecc;	/* 000-255 LP7-0 */
-	ecc_code[0] = ecc >> 8;	/* 000-255 LP15-8 */
-	ecc = tmio_ioread16(tmio->fcr + FCR_DATA);
-	ecc_code[2] = ecc;	/* 000-255 CP5-0,11b */
-	ecc_code[4] = ecc >> 8;	/* 256-511 LP7-0 */
-	ecc = tmio_ioread16(tmio->fcr + FCR_DATA);
-	ecc_code[3] = ecc;	/* 256-511 LP15-8 */
-	ecc_code[5] = ecc >> 8;	/* 256-511 CP5-0,11b */
-
-	tmio_iowrite8(FCR_MODE_DATA, tmio->fcr + FCR_MODE);
-	return 0;
-}
-
-static int tmio_nand_correct_data(struct mtd_info *mtd, unsigned char *buf,
-		unsigned char *read_ecc, unsigned char *calc_ecc)
-{
-	int r0, r1;
-
-	/* assume ecc.size = 512 and ecc.bytes = 6 */
-	r0 = __nand_correct_data(buf, read_ecc, calc_ecc, 256);
-	if (r0 < 0)
-		return r0;
-	r1 = __nand_correct_data(buf + 256, read_ecc + 3, calc_ecc + 3, 256);
-	if (r1 < 0)
-		return r1;
-	return r0 + r1;
-}
-
-static int tmio_hw_init(struct platform_device *dev, struct tmio_nand *tmio)
-{
-	const struct mfd_cell *cell = mfd_get_cell(dev);
-	int ret;
-
-	if (cell->enable) {
-		ret = cell->enable(dev);
-		if (ret)
-			return ret;
-	}
-
-	/* (4Ch) CLKRUN Enable    1st spcrunc */
-	tmio_iowrite8(0x81, tmio->ccr + CCR_ICC);
-
-	/* (10h)BaseAddress    0x1000 spba.spba2 */
-	tmio_iowrite16(tmio->fcr_base, tmio->ccr + CCR_BASE);
-	tmio_iowrite16(tmio->fcr_base >> 16, tmio->ccr + CCR_BASE + 2);
-
-	/* (04h)Command Register I/O spcmd */
-	tmio_iowrite8(0x02, tmio->ccr + CCR_COMMAND);
-
-	/* (62h) Power Supply Control ssmpwc */
-	/* HardPowerOFF - SuspendOFF - PowerSupplyWait_4MS */
-	tmio_iowrite8(0x02, tmio->ccr + CCR_NFPSC);
-
-	/* (63h) Detect Control ssmdtc */
-	tmio_iowrite8(0x02, tmio->ccr + CCR_NFDC);
-
-	/* Interrupt status register clear sintst */
-	tmio_iowrite8(0x0f, tmio->fcr + FCR_ISR);
-
-	/* After power supply, Media are reset smode */
-	tmio_iowrite8(FCR_MODE_POWER_ON, tmio->fcr + FCR_MODE);
-	tmio_iowrite8(FCR_MODE_COMMAND, tmio->fcr + FCR_MODE);
-	tmio_iowrite8(NAND_CMD_RESET, tmio->fcr + FCR_DATA);
-
-	/* Standby Mode smode */
-	tmio_iowrite8(FCR_MODE_STANDBY, tmio->fcr + FCR_MODE);
-
-	mdelay(5);
-
-	return 0;
-}
-
-static void tmio_hw_stop(struct platform_device *dev, struct tmio_nand *tmio)
-{
-	const struct mfd_cell *cell = mfd_get_cell(dev);
-
-	tmio_iowrite8(FCR_MODE_POWER_OFF, tmio->fcr + FCR_MODE);
-	if (cell->disable)
-		cell->disable(dev);
-}
-
-static int tmio_probe(struct platform_device *dev)
-{
-	struct tmio_nand_data *data = dev_get_platdata(&dev->dev);
-	struct resource *fcr = platform_get_resource(dev,
-			IORESOURCE_MEM, 0);
-	struct resource *ccr = platform_get_resource(dev,
-			IORESOURCE_MEM, 1);
-	int irq = platform_get_irq(dev, 0);
-	struct tmio_nand *tmio;
-	struct mtd_info *mtd;
-	struct nand_chip *nand_chip;
-	int retval;
-
-	if (data == NULL)
-		dev_warn(&dev->dev, "NULL platform data!\n");
-
-	tmio = devm_kzalloc(&dev->dev, sizeof(*tmio), GFP_KERNEL);
-	if (!tmio)
-		return -ENOMEM;
-
-	tmio->dev = dev;
-
-	platform_set_drvdata(dev, tmio);
-	nand_chip = &tmio->chip;
-	mtd = nand_to_mtd(nand_chip);
-	mtd->name = "tmio-nand";
-	mtd->dev.parent = &dev->dev;
-
-	tmio->ccr = devm_ioremap(&dev->dev, ccr->start, resource_size(ccr));
-	if (!tmio->ccr)
-		return -EIO;
-
-	tmio->fcr_base = fcr->start & 0xfffff;
-	tmio->fcr = devm_ioremap(&dev->dev, fcr->start, resource_size(fcr));
-	if (!tmio->fcr)
-		return -EIO;
-
-	retval = tmio_hw_init(dev, tmio);
-	if (retval)
-		return retval;
-
-	/* Set address of NAND IO lines */
-	nand_chip->IO_ADDR_R = tmio->fcr;
-	nand_chip->IO_ADDR_W = tmio->fcr;
-
-	/* Set address of hardware control function */
-	nand_chip->cmd_ctrl = tmio_nand_hwcontrol;
-	nand_chip->dev_ready = tmio_nand_dev_ready;
-	nand_chip->read_byte = tmio_nand_read_byte;
-	nand_chip->write_buf = tmio_nand_write_buf;
-	nand_chip->read_buf = tmio_nand_read_buf;
-
-	/* set eccmode using hardware ECC */
-	nand_chip->ecc.mode = NAND_ECC_HW;
-	nand_chip->ecc.size = 512;
-	nand_chip->ecc.bytes = 6;
-	nand_chip->ecc.strength = 2;
-	nand_chip->ecc.hwctl = tmio_nand_enable_hwecc;
-	nand_chip->ecc.calculate = tmio_nand_calculate_ecc;
-	nand_chip->ecc.correct = tmio_nand_correct_data;
-
-	if (data)
-		nand_chip->badblock_pattern = data->badblock_pattern;
-
-	/* 15 us command delay time */
-	nand_chip->chip_delay = 15;
-
-	retval = devm_request_irq(&dev->dev, irq, &tmio_irq, 0,
-				  dev_name(&dev->dev), tmio);
-	if (retval) {
-		dev_err(&dev->dev, "request_irq error %d\n", retval);
-		goto err_irq;
-	}
-
-	tmio->irq = irq;
-	nand_chip->waitfunc = tmio_nand_wait;
-
-	/* Scan to find existence of the device */
-	retval = nand_scan(mtd, 1);
-	if (retval)
-		goto err_irq;
-
-	/* Register the partitions */
-	retval = mtd_device_parse_register(mtd,
-					   data ? data->part_parsers : NULL,
-					   NULL,
-					   data ? data->partition : NULL,
-					   data ? data->num_partitions : 0);
-	if (!retval)
-		return retval;
-
-	nand_release(mtd);
-
-err_irq:
-	tmio_hw_stop(dev, tmio);
-	return retval;
-}
-
-static int tmio_remove(struct platform_device *dev)
-{
-	struct tmio_nand *tmio = platform_get_drvdata(dev);
-
-	nand_release(nand_to_mtd(&tmio->chip));
-	tmio_hw_stop(dev, tmio);
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int tmio_suspend(struct platform_device *dev, pm_message_t state)
-{
-	const struct mfd_cell *cell = mfd_get_cell(dev);
-
-	if (cell->suspend)
-		cell->suspend(dev);
-
-	tmio_hw_stop(dev, platform_get_drvdata(dev));
-	return 0;
-}
-
-static int tmio_resume(struct platform_device *dev)
-{
-	const struct mfd_cell *cell = mfd_get_cell(dev);
-
-	/* FIXME - is this required or merely another attack of the broken
-	 * SHARP platform? Looks suspicious.
-	 */
-	tmio_hw_init(dev, platform_get_drvdata(dev));
-
-	if (cell->resume)
-		cell->resume(dev);
-
-	return 0;
-}
-#else
-#define tmio_suspend NULL
-#define tmio_resume NULL
-#endif
-
-static struct platform_driver tmio_driver = {
-	.driver.name	= "tmio-nand",
-	.driver.owner	= THIS_MODULE,
-	.probe		= tmio_probe,
-	.remove		= tmio_remove,
-	.suspend	= tmio_suspend,
-	.resume		= tmio_resume,
-};
-
-module_platform_driver(tmio_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Ian Molton, Dirk Opfer, Chris Humbert, Dmitry Baryshkov");
-MODULE_DESCRIPTION("NAND flash driver on Toshiba Mobile IO controller");
-MODULE_ALIAS("platform:tmio-nand");