Message ID | 1363258049-28157-1-git-send-email-dedekind1@gmail.com |
---|---|
State | Accepted |
Commit | 75d0c37419abd3757e139c7bbb20d52e12d2791e |
Headers | show |
Acked-by: Kyungmin Park <kyungmin.park@samsung.com> On Thu, Mar 14, 2013 at 7:47 PM, Artem Bityutskiy <dedekind1@gmail.com> wrote: > From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> > > This commit remove OneNAND simulator on the basis that it is useless. > > Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> > --- > drivers/mtd/onenand/Kconfig | 6 - > drivers/mtd/onenand/Makefile | 3 - > drivers/mtd/onenand/onenand_sim.c | 564 ------------------------------------- > 3 files changed, 573 deletions(-) > delete mode 100644 drivers/mtd/onenand/onenand_sim.c > > diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig > index 91467bb..a5c636b 100644 > --- a/drivers/mtd/onenand/Kconfig > +++ b/drivers/mtd/onenand/Kconfig > @@ -68,10 +68,4 @@ 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 > diff --git a/drivers/mtd/onenand/Makefile b/drivers/mtd/onenand/Makefile > index 2b7884c..9d6540e 100644 > --- a/drivers/mtd/onenand/Makefile > +++ b/drivers/mtd/onenand/Makefile > @@ -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 > index 85399e3..0000000 > --- a/drivers/mtd/onenand/onenand_sim.c > +++ /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"); > -- > 1.7.10.4 > > > ______________________________________________________ > Linux MTD discussion mailing list > http://lists.infradead.org/mailman/listinfo/linux-mtd/
On Thu, 2013-03-14 at 12:47 +0200, Artem Bityutskiy wrote: > From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> > > This commit remove OneNAND simulator on the basis that it is useless. > > Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Pushed to l2-mtd.git, thanks!
diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig index 91467bb..a5c636b 100644 --- a/drivers/mtd/onenand/Kconfig +++ b/drivers/mtd/onenand/Kconfig @@ -68,10 +68,4 @@ 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 diff --git a/drivers/mtd/onenand/Makefile b/drivers/mtd/onenand/Makefile index 2b7884c..9d6540e 100644 --- a/drivers/mtd/onenand/Makefile +++ b/drivers/mtd/onenand/Makefile @@ -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 index 85399e3..0000000 --- a/drivers/mtd/onenand/onenand_sim.c +++ /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");