Revert "[PATCH] OneNAND: Add simulator"

This reverts 405c829f98d216925de00af2ee52f969f2c2891c commit.

drivers/mtd/onenand/Kconfig

···
 	help
 	  This enables support for Sync. Burst Read.
 
-config MTD_ONENAND_SIM
-	tristate "Support for OneNAND flash simulator"
-	depends on MTD_ONENAND
-	help
-	  The simulator may simulate verious OneNAND flash chips for the
-          MTD onenand layer.
-
 endmenu

drivers/mtd/onenand/Makefile

···
 # Board specific.
 obj-$(CONFIG_MTD_ONENAND_GENERIC)	+= generic.o
 
-# Simulator
-obj-$(CONFIG_MTD_ONENAND_SIM)		+= onenand_sim.o
-
 onenand-objs = onenand_base.o onenand_bbt.o

drivers/mtd/onenand/onenand_sim.c

···
-/*
- *  linux/drivers/mtd/onenand/simulator.c
- *
- *  The OneNAND simulator
- *
- *  Copyright(c) 2005 Samsung Electronics
- *  Kyungmin Park <[e-mail]>
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/vmalloc.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/onenand.h>
-
-#include <asm/io.h>
-#include <asm/sizes.h>
-
-#ifndef CONFIG_ONENAND_SIM_MANUFACTURER
-#define CONFIG_ONENAND_SIM_MANUFACTURER		0xec
-#endif
-#ifndef CONFIG_ONENAND_SIM_DEVICE_ID
-#define CONFIG_ONENAND_SIM_DEVICE_ID		0x04
-#endif
-#ifndef CONFIG_ONENAND_SIM_VERSION_ID
-#define CONFIG_ONENAND_SIM_VERSION_ID		0x1e
-#endif
-
-static int manuf_id = CONFIG_ONENAND_SIM_MANUFACTURER;
-static int device_id = CONFIG_ONENAND_SIM_DEVICE_ID;
-static int version_id = CONFIG_ONENAND_SIM_VERSION_ID;
-
-struct onenand_flash {
-	void __iomem	*base;
-	void __iomem	*data;
-};
-
-#define ONENAND_CORE(flash)	(flash->data)
-
-#define ONENAND_MAIN_AREA(this, offset)					\
-	(this->base + ONENAND_DATARAM + offset)
-
-#define ONENAND_SPARE_AREA(this, offset)				\
-	(this->base + ONENAND_SPARERAM + offset)
-
-#define ONENAND_GET_WP_STATUS(this)					\
-	(readw(this->base + ONENAND_REG_WP_STATUS))
-
-#define ONENAND_SET_WP_STATUS(v, this)					\
-	(writew(v, this->base + ONENAND_REG_WP_STATUS))
-
-/* It has all 0xff chars */
-static unsigned char *ffchars;
-
-/*
- * OneNAND simulator mtd
- */
-struct mtd_info *onenand_sim;
-
-
-/**
- * onenand_lock_handle - Handle Lock scheme
- * @param this		OneNAND device structure
- * @param cmd		The command to be sent
- *
- * Send lock command to OneNAND device.
- * The lock scheme is depends on chip type.
- */
-static void onenand_lock_handle(struct onenand_chip *this, int cmd)
-{
-	int block_lock_scheme;
-	int status;
-
-	status = ONENAND_GET_WP_STATUS(this);
-	block_lock_scheme = !(this->options & ONENAND_CONT_LOCK);
-	
-	switch (cmd) {
-	case ONENAND_CMD_UNLOCK:
-		if (block_lock_scheme)
-			ONENAND_SET_WP_STATUS(ONENAND_WP_US, this);
-		else
-			ONENAND_SET_WP_STATUS(status | ONENAND_WP_US, this);
-		break;
-
-	case ONENAND_CMD_LOCK:
-		if (block_lock_scheme)
-			ONENAND_SET_WP_STATUS(ONENAND_WP_LS, this);
-		else
-			ONENAND_SET_WP_STATUS(status | ONENAND_WP_LS, this);
-		break;
-
-	case ONENAND_CMD_LOCK_TIGHT:
-		if (block_lock_scheme)
-			ONENAND_SET_WP_STATUS(ONENAND_WP_LTS, this);
-		else
-			ONENAND_SET_WP_STATUS(status | ONENAND_WP_LTS, this);
-		break;
-
-	default:
-		break;
-	}
-}
-
-/**
- * onenand_bootram_handle - Handle BootRAM area
- * @param this		OneNAND device structure
- * @param cmd		The command to be sent
- *
- * Emulate BootRAM area. It is possible to do basic operation using BootRAM.
- */
-static void onenand_bootram_handle(struct onenand_chip *this, int cmd)
-{
-	switch (cmd) {
-	case ONENAND_CMD_READID:
-		writew(manuf_id, this->base);
-		writew(device_id, this->base + 2);
-		writew(version_id, this->base + 4);
-		break;
-
-	default:
-		/* REVIST: Handle other commands */
-		break;
-	}
-}
-
-/**
- * onenand_update_interrupt - Set interrupt register
- * @param this		OneNAND device structure
- * @param cmd		The command to be sent
- *
- * Update interrupt register. The status is depends on command.
- */
-static void onenand_update_interrupt(struct onenand_chip *this, int cmd)
-{
-	int interrupt = ONENAND_INT_MASTER;
-
-	switch (cmd) {
-	case ONENAND_CMD_READ:
-	case ONENAND_CMD_READOOB:
-		interrupt |= ONENAND_INT_READ;
-		break;
-
-	case ONENAND_CMD_PROG:
-	case ONENAND_CMD_PROGOOB:
-		interrupt |= ONENAND_INT_WRITE;
-		break;
-
-	case ONENAND_CMD_ERASE:
-		interrupt |= ONENAND_INT_ERASE;
-		break;
-
-	case ONENAND_CMD_RESET:
-		interrupt |= ONENAND_INT_RESET;
-		break;
-
-	default:
-		break;
-	}
-
-	writew(interrupt, this->base + ONENAND_REG_INTERRUPT);
-}
-
-/**
- * onenand_check_overwrite - Check over-write if happend
- * @param dest		The destination pointer
- * @param src		The source pointer
- * @param count		The length to be check
- * @return 		0 on same, otherwise 1
- *
- * Compare the source with destination
- */
-static int onenand_check_overwrite(void *dest, void *src, size_t count)
-{
-	unsigned int *s = (unsigned int *) src;
-	unsigned int *d = (unsigned int *) dest;
-	int i;
-	count >>= 2;
-
-	for (i = 0; i < count; i++)
-		if ((*s++ ^ *d++) != 0)
-			return 1;
-
-	return 0;
-}
-
-/**
- * onenand_data_handle - Handle OneNAND Core and DataRAM
- * @param this		OneNAND device structure
- * @param cmd		The command to be sent
- * @param dataram	Which dataram used
- * @param offset	The offset to OneNAND Core
- *
- * Copy data from OneNAND Core to DataRAM (read)
- * Copy data from DataRAM to OneNAND Core (write)
- * Erase the OneNAND Core (erase)
- */
-static void onenand_data_handle(struct onenand_chip *this, int cmd,
-					int dataram, unsigned int offset)
-{
-	struct onenand_flash *flash = this->priv;
-	int main_offset, spare_offset;
-	void __iomem *src;
-	void __iomem *dest;
-
-	if (dataram) {
-		main_offset = onenand_sim->oobblock;
-		spare_offset = onenand_sim->oobsize;
-	} else {
-		main_offset = 0;
-		spare_offset = 0;
-	}
-
-	switch (cmd) {
-	case ONENAND_CMD_READ:
-		src = ONENAND_CORE(flash) + offset;
-		dest = ONENAND_MAIN_AREA(this, main_offset);
-		memcpy(dest, src, onenand_sim->oobblock);
-		/* Fall through */
-
-	case ONENAND_CMD_READOOB:
-		src = ONENAND_CORE(flash) + this->chipsize + (offset >> 5);
-		dest = ONENAND_SPARE_AREA(this, spare_offset);
-		memcpy(dest, src, onenand_sim->oobsize);
-		break;
-
-	case ONENAND_CMD_PROG:
-		src = ONENAND_MAIN_AREA(this, main_offset);
-		dest = ONENAND_CORE(flash) + offset;
-		if (memcmp(dest, ffchars, onenand_sim->oobblock) &&
-		    onenand_check_overwrite(dest, src, onenand_sim->oobblock))
-			printk(KERN_ERR "over-write happend at 0x%08x\n", offset);
-		memcpy(dest, src, onenand_sim->oobblock);
-		/* Fall through */
-
-	case ONENAND_CMD_PROGOOB:
-		src = ONENAND_SPARE_AREA(this, spare_offset);
-		/* Check all data is 0xff chars */
-		if (!memcmp(src, ffchars, onenand_sim->oobsize))
-			break;
-
-		dest = ONENAND_CORE(flash) + this->chipsize + (offset >> 5);
-		if (memcmp(dest, ffchars, onenand_sim->oobsize) &&
-		    onenand_check_overwrite(dest, src, onenand_sim->oobsize)) 
-			printk(KERN_ERR "OOB: over-write happend at 0x%08x\n", offset);
-		memcpy(dest, src, onenand_sim->oobsize);
-		break;
-
-	case ONENAND_CMD_ERASE:
-		memset(ONENAND_CORE(flash) + offset, 0xff, (1 << this->erase_shift));
-		break;
-
-	default:
-		break;
-	}
-}
-
-/**
- * onenand_command_handle - Handle command
- * @param this		OneNAND device structure
- * @param cmd		The command to be sent
- *
- * Emulate OneNAND command.
- */
-static void onenand_command_handle(struct onenand_chip *this, int cmd)
-{
-	unsigned long offset = 0;
-	int block = -1, page = -1, bufferram = -1;
-	int dataram = 0;
-
-	switch (cmd) {
-	case ONENAND_CMD_UNLOCK:
-	case ONENAND_CMD_LOCK:
-	case ONENAND_CMD_LOCK_TIGHT:
-		onenand_lock_handle(this, cmd);
-		break;
-
-	case ONENAND_CMD_BUFFERRAM:
-		/* Do nothing */
-		return;
-
-	default:
-		block = (int) readw(this->base + ONENAND_REG_START_ADDRESS1);
-		if (block & (1 << ONENAND_DDP_SHIFT)) {
-			block &= ~(1 << ONENAND_DDP_SHIFT);
-			/* The half of chip block */
-			block += this->chipsize >> (this->erase_shift + 1);
-		}
-		if (cmd == ONENAND_CMD_ERASE)
-			break;
-
-		page = (int) readw(this->base + ONENAND_REG_START_ADDRESS8);
-		page = (page >> ONENAND_FPA_SHIFT);
-		bufferram = (int) readw(this->base + ONENAND_REG_START_BUFFER);
-		bufferram >>= ONENAND_BSA_SHIFT;
-		bufferram &= ONENAND_BSA_DATARAM1;
-		dataram = (bufferram == ONENAND_BSA_DATARAM1) ? 1 : 0;
-		break;
-	}
-
-	if (block != -1)
-		offset += block << this->erase_shift;
-
-	if (page != -1)
-		offset += page << this->page_shift;
-
-	onenand_data_handle(this, cmd, dataram, offset);
-
-	onenand_update_interrupt(this, cmd);
-}
-
-/**
- * onenand_writew - [OneNAND Interface] Emulate write operation
- * @param value		value to write
- * @param addr		address to write
- *
- * Write OneNAND reigser with value
- */
-static void onenand_writew(unsigned short value, void __iomem *addr)
-{
-	struct onenand_chip *this = onenand_sim->priv;
-
-	/* BootRAM handling */
-	if (addr < this->base + ONENAND_DATARAM) {
-		onenand_bootram_handle(this, value);
-		return;
-	}
-	/* Command handling */
-	if (addr == this->base + ONENAND_REG_COMMAND)
-		onenand_command_handle(this, value);
-
-	writew(value, addr);
-}
-
-/**
- * flash_init - Initialize OneNAND simulator
- * @param flash		OneNAND simulaotr data strucutres
- *
- * Initialize OneNAND simulator.
- */
-static int __init flash_init(struct onenand_flash *flash)
-{
-	int density, size;
-	int buffer_size;
-
-	flash->base = kmalloc(SZ_128K, GFP_KERNEL);
-	if (!flash->base) {
-		printk(KERN_ERR "Unalbe to allocate base address.\n");
-		return -ENOMEM;
-	}
-
-	memset(flash->base, 0, SZ_128K);
-
-	density = device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
-	size = ((16 << 20) << density);
-
-	ONENAND_CORE(flash) = vmalloc(size + (size >> 5));
-	if (!ONENAND_CORE(flash)) {
-		printk(KERN_ERR "Unalbe to allocate nand core address.\n");
-		kfree(flash->base);
-		return -ENOMEM;
-	}
-
-	memset(ONENAND_CORE(flash), 0xff, size + (size >> 5));
-
-	/* Setup registers */
-	writew(manuf_id, flash->base + ONENAND_REG_MANUFACTURER_ID);
-	writew(device_id, flash->base + ONENAND_REG_DEVICE_ID);
-	writew(version_id, flash->base + ONENAND_REG_VERSION_ID);
-
-	if (density < 2)
-		buffer_size = 0x0400;	/* 1KB page */
-	else
-		buffer_size = 0x0800;	/* 2KB page */
-	writew(buffer_size, flash->base + ONENAND_REG_DATA_BUFFER_SIZE);
-		
-	return 0;
-}
-
-/**
- * flash_exit - Clean up OneNAND simulator
- * @param flash		OneNAND simulaotr data strucutres
- *
- * Clean up OneNAND simulator.
- */
-static void flash_exit(struct onenand_flash *flash)
-{
-	vfree(ONENAND_CORE(flash));
-	kfree(flash->base);
-	kfree(flash);
-}
-
-static int __init onenand_sim_init(void)
-{
-	struct onenand_chip *this;
-	struct onenand_flash *flash;
-	int len;
-
-	/* Allocate all 0xff chars pointer */
-	ffchars = kmalloc(MAX_ONENAND_PAGESIZE, GFP_KERNEL);
-	if (!ffchars) {
-		printk(KERN_ERR "Unable to allocate ff chars.\n");
-		return -ENOMEM;
-	}
-	memset(ffchars, 0xff, MAX_ONENAND_PAGESIZE);
-
-	len = sizeof(struct mtd_info) + sizeof(struct onenand_chip) + sizeof (struct onenand_flash);
-
-	/* Allocate OneNAND simulator mtd pointer */
-	onenand_sim = kmalloc(len, GFP_KERNEL);
-	if (!onenand_sim) {
-		printk(KERN_ERR "Unable to allocate core structures.\n");
-		kfree(ffchars);
-		return -ENOMEM;
-	}
-
-	memset(onenand_sim, 0, len);
-
-	this = (struct onenand_chip *) (onenand_sim + 1);
-	/* Override write_word function */
-	this->write_word = onenand_writew;
-
-	flash = (struct onenand_flash *) (this + 1);
-
-	if (flash_init(flash)) {
-		printk(KERN_ERR "Unable to allocat flash.\n");
-		kfree(ffchars);
-		kfree(onenand_sim);
-		return -ENOMEM;
-	}
-
-	this->base = flash->base;
-	this->priv = flash;
-	onenand_sim->priv = this;
-
-	if (onenand_scan(onenand_sim, 1)) {
-		kfree(ffchars);
-		kfree(onenand_sim);
-		flash_exit(flash);
-		return -ENXIO;
-	}
-
-	add_mtd_device(onenand_sim);
-
-	return 0;
-}
-
-static void __exit onenand_sim_exit(void)
-{
-	struct onenand_chip *this = onenand_sim->priv;
-	struct onenand_flash *flash = this->priv;
-
-	kfree(ffchars);
-	onenand_release(onenand_sim);
-	flash_exit(flash);
-	kfree(onenand_sim);
-}
-
-module_init(onenand_sim_init);
-module_exit(onenand_sim_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Kyungmin Park <[e-mail]>");
-MODULE_DESCRIPTION("The OneNAND flash simulator");