mtd: onenand: remove OneNAND simulator
authorArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
Thu, 14 Mar 2013 10:47:29 +0000 (12:47 +0200)
committerDavid Woodhouse <David.Woodhouse@intel.com>
Fri, 5 Apr 2013 12:19:26 +0000 (13:19 +0100)
This commit remove OneNAND simulator on the basis that it is useless.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
drivers/mtd/onenand/Kconfig
drivers/mtd/onenand/Makefile
drivers/mtd/onenand/onenand_sim.c [deleted file]

index eac7bb2..ab26072 100644 (file)
@@ -67,10 +67,4 @@ config MTD_ONENAND_2X_PROGRAM
 
          And more recent chips
 
-config MTD_ONENAND_SIM
-       tristate "OneNAND simulator support"
-       help
-         The simulator may simulate various OneNAND flash chips for the
-         OneNAND MTD layer.
-
 endif # MTD_ONENAND
index 2b7884c..9d6540e 100644 (file)
@@ -10,7 +10,4 @@ obj-$(CONFIG_MTD_ONENAND_GENERIC)     += generic.o
 obj-$(CONFIG_MTD_ONENAND_OMAP2)                += omap2.o
 obj-$(CONFIG_MTD_ONENAND_SAMSUNG)       += samsung.o
 
-# Simulator
-obj-$(CONFIG_MTD_ONENAND_SIM)          += onenand_sim.o
-
 onenand-objs = onenand_base.o onenand_bbt.o
diff --git a/drivers/mtd/onenand/onenand_sim.c b/drivers/mtd/onenand/onenand_sim.c
deleted file mode 100644 (file)
index 85399e3..0000000
+++ /dev/null
@@ -1,564 +0,0 @@
-/*
- *  linux/drivers/mtd/onenand/onenand_sim.c
- *
- *  The OneNAND simulator
- *
- *  Copyright © 2005-2007 Samsung Electronics
- *  Kyungmin Park <kyungmin.park@samsung.com>
- *
- *  Vishak G <vishak.g at samsung.com>, Rohit Hagargundgi <h.rohit at samsung.com>
- *  Flex-OneNAND simulator support
- *  Copyright (C) Samsung Electronics, 2008
- *
- * 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/kernel.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/vmalloc.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/onenand.h>
-
-#include <linux/io.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
-
-#define CONFIG_FLEXONENAND ((CONFIG_ONENAND_SIM_DEVICE_ID >> 9) & 1)
-
-#ifndef CONFIG_ONENAND_SIM_VERSION_ID
-#define CONFIG_ONENAND_SIM_VERSION_ID           0x1e
-#endif
-
-#ifndef CONFIG_ONENAND_SIM_TECHNOLOGY_ID
-#define CONFIG_ONENAND_SIM_TECHNOLOGY_ID CONFIG_FLEXONENAND
-#endif
-
-/* Initial boundary values for Flex-OneNAND Simulator */
-#ifndef CONFIG_FLEXONENAND_SIM_DIE0_BOUNDARY
-#define CONFIG_FLEXONENAND_SIM_DIE0_BOUNDARY   0x01
-#endif
-
-#ifndef CONFIG_FLEXONENAND_SIM_DIE1_BOUNDARY
-#define CONFIG_FLEXONENAND_SIM_DIE1_BOUNDARY   0x01
-#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;
-static int technology_id = CONFIG_ONENAND_SIM_TECHNOLOGY_ID;
-static int boundary[] = {
-       CONFIG_FLEXONENAND_SIM_DIE0_BOUNDARY,
-       CONFIG_FLEXONENAND_SIM_DIE1_BOUNDARY,
-};
-
-struct onenand_flash {
-       void __iomem *base;
-       void __iomem *data;
-};
-
-#define ONENAND_CORE(flash)            (flash->data)
-#define ONENAND_CORE_SPARE(flash, this, offset)                                \
-       ((flash->data) + (this->chipsize) + (offset >> 5))
-
-#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 */
-#define MAX_ONENAND_PAGESIZE           (4096 + 128)
-static unsigned char *ffchars;
-
-#if CONFIG_FLEXONENAND
-#define PARTITION_NAME "Flex-OneNAND simulator partition"
-#else
-#define PARTITION_NAME "OneNAND simulator partition"
-#endif
-
-static struct mtd_partition os_partitions[] = {
-       {
-               .name           = PARTITION_NAME,
-               .offset         = 0,
-               .size           = MTDPART_SIZ_FULL,
-       },
-};
-
-/*
- * OneNAND simulator mtd
- */
-struct onenand_info {
-       struct mtd_info         mtd;
-       struct mtd_partition    *parts;
-       struct onenand_chip     onenand;
-       struct onenand_flash    flash;
-};
-
-static struct onenand_info *info;
-
-#define DPRINTK(format, args...)                                       \
-do {                                                                   \
-       printk(KERN_DEBUG "%s[%d]: " format "\n", __func__,             \
-                          __LINE__, ##args);                           \
-} while (0)
-
-/**
- * onenand_lock_handle - Handle Lock scheme
- * @this:              OneNAND device structure
- * @cmd:               The command to be sent
- *
- * Send lock command to OneNAND device.
- * The lock scheme 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_HAS_CONT_LOCK);
-
-       switch (cmd) {
-       case ONENAND_CMD_UNLOCK:
-       case ONENAND_CMD_UNLOCK_ALL:
-               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
- * @this:              OneNAND device structure
- * @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
- * @this:         OneNAND device structure
- * @cmd:          The command to be sent
- *
- * Update interrupt register. The status 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 if over-write happened
- * @dest:              The destination pointer
- * @src:               The source pointer
- * @count:             The length to be check
- *
- * Returns:            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
- * @this:              OneNAND device structure
- * @cmd:               The command to be sent
- * @dataram:           Which dataram used
- * @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 mtd_info *mtd = &info->mtd;
-       struct onenand_flash *flash = this->priv;
-       int main_offset, spare_offset, die = 0;
-       void __iomem *src;
-       void __iomem *dest;
-       unsigned int i;
-       static int pi_operation;
-       int erasesize, rgn;
-
-       if (dataram) {
-               main_offset = mtd->writesize;
-               spare_offset = mtd->oobsize;
-       } else {
-               main_offset = 0;
-               spare_offset = 0;
-       }
-
-       if (pi_operation) {
-               die = readw(this->base + ONENAND_REG_START_ADDRESS2);
-               die >>= ONENAND_DDP_SHIFT;
-       }
-
-       switch (cmd) {
-       case FLEXONENAND_CMD_PI_ACCESS:
-               pi_operation = 1;
-               break;
-
-       case ONENAND_CMD_RESET:
-               pi_operation = 0;
-               break;
-
-       case ONENAND_CMD_READ:
-               src = ONENAND_CORE(flash) + offset;
-               dest = ONENAND_MAIN_AREA(this, main_offset);
-               if (pi_operation) {
-                       writew(boundary[die], this->base + ONENAND_DATARAM);
-                       break;
-               }
-               memcpy(dest, src, mtd->writesize);
-               /* Fall through */
-
-       case ONENAND_CMD_READOOB:
-               src = ONENAND_CORE_SPARE(flash, this, offset);
-               dest = ONENAND_SPARE_AREA(this, spare_offset);
-               memcpy(dest, src, mtd->oobsize);
-               break;
-
-       case ONENAND_CMD_PROG:
-               src = ONENAND_MAIN_AREA(this, main_offset);
-               dest = ONENAND_CORE(flash) + offset;
-               if (pi_operation) {
-                       boundary[die] = readw(this->base + ONENAND_DATARAM);
-                       break;
-               }
-               /* To handle partial write */
-               for (i = 0; i < (1 << mtd->subpage_sft); i++) {
-                       int off = i * this->subpagesize;
-                       if (!memcmp(src + off, ffchars, this->subpagesize))
-                               continue;
-                       if (memcmp(dest + off, ffchars, this->subpagesize) &&
-                           onenand_check_overwrite(dest + off, src + off, this->subpagesize))
-                               printk(KERN_ERR "over-write happened at 0x%08x\n", offset);
-                       memcpy(dest + off, src + off, this->subpagesize);
-               }
-               /* Fall through */
-
-       case ONENAND_CMD_PROGOOB:
-               src = ONENAND_SPARE_AREA(this, spare_offset);
-               /* Check all data is 0xff chars */
-               if (!memcmp(src, ffchars, mtd->oobsize))
-                       break;
-
-               dest = ONENAND_CORE_SPARE(flash, this, offset);
-               if (memcmp(dest, ffchars, mtd->oobsize) &&
-                   onenand_check_overwrite(dest, src, mtd->oobsize))
-                       printk(KERN_ERR "OOB: over-write happened at 0x%08x\n",
-                              offset);
-               memcpy(dest, src, mtd->oobsize);
-               break;
-
-       case ONENAND_CMD_ERASE:
-               if (pi_operation)
-                       break;
-
-               if (FLEXONENAND(this)) {
-                       rgn = flexonenand_region(mtd, offset);
-                       erasesize = mtd->eraseregions[rgn].erasesize;
-               } else
-                       erasesize = mtd->erasesize;
-
-               memset(ONENAND_CORE(flash) + offset, 0xff, erasesize);
-               memset(ONENAND_CORE_SPARE(flash, this, offset), 0xff,
-                      (erasesize >> 5));
-               break;
-
-       default:
-               break;
-       }
-}
-
-/**
- * onenand_command_handle - Handle command
- * @this:              OneNAND device structure
- * @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:
-       case ONENAND_CMD_UNLOCK_ALL:
-               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 = onenand_addr(this, block);
-
-       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
- * @value:             value to write
- * @addr:              address to write
- *
- * Write OneNAND register with value
- */
-static void onenand_writew(unsigned short value, void __iomem * addr)
-{
-       struct onenand_chip *this = info->mtd.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
- * @flash:             OneNAND simulator data strucutres
- *
- * Initialize OneNAND simulator.
- */
-static int __init flash_init(struct onenand_flash *flash)
-{
-       int density, size;
-       int buffer_size;
-
-       flash->base = kzalloc(131072, GFP_KERNEL);
-       if (!flash->base) {
-               printk(KERN_ERR "Unable to allocate base address.\n");
-               return -ENOMEM;
-       }
-
-       density = device_id >> ONENAND_DEVICE_DENSITY_SHIFT;
-       density &= ONENAND_DEVICE_DENSITY_MASK;
-       size = ((16 << 20) << density);
-
-       ONENAND_CORE(flash) = vmalloc(size + (size >> 5));
-       if (!ONENAND_CORE(flash)) {
-               printk(KERN_ERR "Unable 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);
-       writew(technology_id, flash->base + ONENAND_REG_TECHNOLOGY);
-
-       if (density < 2 && (!CONFIG_FLEXONENAND))
-               buffer_size = 0x0400;   /* 1KiB page */
-       else
-               buffer_size = 0x0800;   /* 2KiB page */
-       writew(buffer_size, flash->base + ONENAND_REG_DATA_BUFFER_SIZE);
-
-       return 0;
-}
-
-/**
- * flash_exit - Clean up OneNAND simulator
- * @flash:             OneNAND simulator data structures
- *
- * Clean up OneNAND simulator.
- */
-static void flash_exit(struct onenand_flash *flash)
-{
-       vfree(ONENAND_CORE(flash));
-       kfree(flash->base);
-}
-
-static int __init onenand_sim_init(void)
-{
-       /* 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);
-
-       /* Allocate OneNAND simulator mtd pointer */
-       info = kzalloc(sizeof(struct onenand_info), GFP_KERNEL);
-       if (!info) {
-               printk(KERN_ERR "Unable to allocate core structures.\n");
-               kfree(ffchars);
-               return -ENOMEM;
-       }
-
-       /* Override write_word function */
-       info->onenand.write_word = onenand_writew;
-
-       if (flash_init(&info->flash)) {
-               printk(KERN_ERR "Unable to allocate flash.\n");
-               kfree(ffchars);
-               kfree(info);
-               return -ENOMEM;
-       }
-
-       info->parts = os_partitions;
-
-       info->onenand.base = info->flash.base;
-       info->onenand.priv = &info->flash;
-
-       info->mtd.name = "OneNAND simulator";
-       info->mtd.priv = &info->onenand;
-       info->mtd.owner = THIS_MODULE;
-
-       if (onenand_scan(&info->mtd, 1)) {
-               flash_exit(&info->flash);
-               kfree(ffchars);
-               kfree(info);
-               return -ENXIO;
-       }
-
-       mtd_device_register(&info->mtd, info->parts,
-                           ARRAY_SIZE(os_partitions));
-
-       return 0;
-}
-
-static void __exit onenand_sim_exit(void)
-{
-       struct onenand_chip *this = info->mtd.priv;
-       struct onenand_flash *flash = this->priv;
-
-       onenand_release(&info->mtd);
-       flash_exit(flash);
-       kfree(ffchars);
-       kfree(info);
-}
-
-module_init(onenand_sim_init);
-module_exit(onenand_sim_exit);
-
-MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
-MODULE_DESCRIPTION("The OneNAND flash simulator");
-MODULE_LICENSE("GPL");