/* * linux/drivers/mtd/onenand/onenand_base.c * * Copyright (C) 2005-2006 Samsung Electronics * Kyungmin Park * * 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 #include #include #include #include #include #include #include #include #include /** * onenand_oob_64 - oob info for large (2KB) page */ static struct nand_ecclayout onenand_oob_64 = { .eccbytes = 20, .eccpos = { 8, 9, 10, 11, 12, 24, 25, 26, 27, 28, 40, 41, 42, 43, 44, 56, 57, 58, 59, 60, }, .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2}, {34, 3}, {46, 2}, {50, 3}, {62, 2} } }; /** * onenand_oob_32 - oob info for middle (1KB) page */ static struct nand_ecclayout onenand_oob_32 = { .eccbytes = 10, .eccpos = { 8, 9, 10, 11, 12, 24, 25, 26, 27, 28, }, .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} } }; static const unsigned char ffchars[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */ }; /** * onenand_readw - [OneNAND Interface] Read OneNAND register * @param addr address to read * * Read OneNAND register */ static unsigned short onenand_readw(void __iomem *addr) { return readw(addr); } /** * onenand_writew - [OneNAND Interface] Write OneNAND register with value * @param value value to write * @param addr address to write * * Write OneNAND register with value */ static void onenand_writew(unsigned short value, void __iomem *addr) { writew(value, addr); } /** * onenand_block_address - [DEFAULT] Get block address * @param this onenand chip data structure * @param block the block * @return translated block address if DDP, otherwise same * * Setup Start Address 1 Register (F100h) */ static int onenand_block_address(struct onenand_chip *this, int block) { if (this->device_id & ONENAND_DEVICE_IS_DDP) { /* Device Flash Core select, NAND Flash Block Address */ int dfs = 0; if (block & this->density_mask) dfs = 1; return (dfs << ONENAND_DDP_SHIFT) | (block & (this->density_mask - 1)); } return block; } /** * onenand_bufferram_address - [DEFAULT] Get bufferram address * @param this onenand chip data structure * @param block the block * @return set DBS value if DDP, otherwise 0 * * Setup Start Address 2 Register (F101h) for DDP */ static int onenand_bufferram_address(struct onenand_chip *this, int block) { if (this->device_id & ONENAND_DEVICE_IS_DDP) { /* Device BufferRAM Select */ int dbs = 0; if (block & this->density_mask) dbs = 1; return (dbs << ONENAND_DDP_SHIFT); } return 0; } /** * onenand_page_address - [DEFAULT] Get page address * @param page the page address * @param sector the sector address * @return combined page and sector address * * Setup Start Address 8 Register (F107h) */ static int onenand_page_address(int page, int sector) { /* Flash Page Address, Flash Sector Address */ int fpa, fsa; fpa = page & ONENAND_FPA_MASK; fsa = sector & ONENAND_FSA_MASK; return ((fpa << ONENAND_FPA_SHIFT) | fsa); } /** * onenand_buffer_address - [DEFAULT] Get buffer address * @param dataram1 DataRAM index * @param sectors the sector address * @param count the number of sectors * @return the start buffer value * * Setup Start Buffer Register (F200h) */ static int onenand_buffer_address(int dataram1, int sectors, int count) { int bsa, bsc; /* BufferRAM Sector Address */ bsa = sectors & ONENAND_BSA_MASK; if (dataram1) bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */ else bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */ /* BufferRAM Sector Count */ bsc = count & ONENAND_BSC_MASK; return ((bsa << ONENAND_BSA_SHIFT) | bsc); } /** * onenand_command - [DEFAULT] Send command to OneNAND device * @param mtd MTD device structure * @param cmd the command to be sent * @param addr offset to read from or write to * @param len number of bytes to read or write * * Send command to OneNAND device. This function is used for middle/large page * devices (1KB/2KB Bytes per page) */ static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len) { struct onenand_chip *this = mtd->priv; int value, readcmd = 0, block_cmd = 0; int block, page; /* Address translation */ switch (cmd) { case ONENAND_CMD_UNLOCK: case ONENAND_CMD_LOCK: case ONENAND_CMD_LOCK_TIGHT: case ONENAND_CMD_UNLOCK_ALL: block = -1; page = -1; break; case ONENAND_CMD_ERASE: case ONENAND_CMD_BUFFERRAM: case ONENAND_CMD_OTP_ACCESS: block_cmd = 1; block = (int) (addr >> this->erase_shift); page = -1; break; default: block = (int) (addr >> this->erase_shift); page = (int) (addr >> this->page_shift); page &= this->page_mask; break; } /* NOTE: The setting order of the registers is very important! */ if (cmd == ONENAND_CMD_BUFFERRAM) { /* Select DataRAM for DDP */ value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); /* Switch to the next data buffer */ ONENAND_SET_NEXT_BUFFERRAM(this); return 0; } if (block != -1) { /* Write 'DFS, FBA' of Flash */ value = onenand_block_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); if (block_cmd) { /* Select DataRAM for DDP */ value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); } } if (page != -1) { /* Now we use page size operation */ int sectors = 4, count = 4; int dataram; switch (cmd) { case ONENAND_CMD_READ: case ONENAND_CMD_READOOB: dataram = ONENAND_SET_NEXT_BUFFERRAM(this); readcmd = 1; break; default: dataram = ONENAND_CURRENT_BUFFERRAM(this); break; } /* Write 'FPA, FSA' of Flash */ value = onenand_page_address(page, sectors); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS8); /* Write 'BSA, BSC' of DataRAM */ value = onenand_buffer_address(dataram, sectors, count); this->write_word(value, this->base + ONENAND_REG_START_BUFFER); if (readcmd) { /* Select DataRAM for DDP */ value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); } } /* Interrupt clear */ this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT); /* Write command */ this->write_word(cmd, this->base + ONENAND_REG_COMMAND); return 0; } /** * onenand_wait - [DEFAULT] wait until the command is done * @param mtd MTD device structure * @param state state to select the max. timeout value * * Wait for command done. This applies to all OneNAND command * Read can take up to 30us, erase up to 2ms and program up to 350us * according to general OneNAND specs */ static int onenand_wait(struct mtd_info *mtd, int state) { struct onenand_chip * this = mtd->priv; unsigned long timeout; unsigned int flags = ONENAND_INT_MASTER; unsigned int interrupt = 0; unsigned int ctrl; /* The 20 msec is enough */ timeout = jiffies + msecs_to_jiffies(20); while (time_before(jiffies, timeout)) { interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); if (interrupt & flags) break; if (state != FL_READING) cond_resched(); } /* To get correct interrupt status in timeout case */ interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT); ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS); if (ctrl & ONENAND_CTRL_ERROR) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl); if (ctrl & ONENAND_CTRL_LOCK) DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error.\n"); return ctrl; } if (interrupt & ONENAND_INT_READ) { int ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS); if (ecc) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc); if (ecc & ONENAND_ECC_2BIT_ALL) { mtd->ecc_stats.failed++; return ecc; } else if (ecc & ONENAND_ECC_1BIT_ALL) mtd->ecc_stats.corrected++; } } else if (state == FL_READING) { printk(KERN_ERR "onenand_wait: read timeout! ctrl=0x%04x intr=0x%04x\n", ctrl, interrupt); return -EIO; } return 0; } /* * onenand_interrupt - [DEFAULT] onenand interrupt handler * @param irq onenand interrupt number * @param dev_id interrupt data * * complete the work */ static irqreturn_t onenand_interrupt(int irq, void *data) { struct onenand_chip *this = (struct onenand_chip *) data; /* To handle shared interrupt */ if (!this->complete.done) complete(&this->complete); return IRQ_HANDLED; } /* * onenand_interrupt_wait - [DEFAULT] wait until the command is done * @param mtd MTD device structure * @param state state to select the max. timeout value * * Wait for command done. */ static int onenand_interrupt_wait(struct mtd_info *mtd, int state) { struct onenand_chip *this = mtd->priv; wait_for_completion(&this->complete); return onenand_wait(mtd, state); } /* * onenand_try_interrupt_wait - [DEFAULT] try interrupt wait * @param mtd MTD device structure * @param state state to select the max. timeout value * * Try interrupt based wait (It is used one-time) */ static int onenand_try_interrupt_wait(struct mtd_info *mtd, int state) { struct onenand_chip *this = mtd->priv; unsigned long remain, timeout; /* We use interrupt wait first */ this->wait = onenand_interrupt_wait; timeout = msecs_to_jiffies(100); remain = wait_for_completion_timeout(&this->complete, timeout); if (!remain) { printk(KERN_INFO "OneNAND: There's no interrupt. " "We use the normal wait\n"); /* Release the irq */ free_irq(this->irq, this); this->wait = onenand_wait; } return onenand_wait(mtd, state); } /* * onenand_setup_wait - [OneNAND Interface] setup onenand wait method * @param mtd MTD device structure * * There's two method to wait onenand work * 1. polling - read interrupt status register * 2. interrupt - use the kernel interrupt method */ static void onenand_setup_wait(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; int syscfg; init_completion(&this->complete); if (this->irq <= 0) { this->wait = onenand_wait; return; } if (request_irq(this->irq, &onenand_interrupt, IRQF_SHARED, "onenand", this)) { /* If we can't get irq, use the normal wait */ this->wait = onenand_wait; return; } /* Enable interrupt */ syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1); syscfg |= ONENAND_SYS_CFG1_IOBE; this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1); this->wait = onenand_try_interrupt_wait; } /** * onenand_bufferram_offset - [DEFAULT] BufferRAM offset * @param mtd MTD data structure * @param area BufferRAM area * @return offset given area * * Return BufferRAM offset given area */ static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area) { struct onenand_chip *this = mtd->priv; if (ONENAND_CURRENT_BUFFERRAM(this)) { if (area == ONENAND_DATARAM) return mtd->writesize; if (area == ONENAND_SPARERAM) return mtd->oobsize; } return 0; } /** * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area * @param mtd MTD data structure * @param area BufferRAM area * @param buffer the databuffer to put/get data * @param offset offset to read from or write to * @param count number of bytes to read/write * * Read the BufferRAM area */ static int onenand_read_bufferram(struct mtd_info *mtd, int area, unsigned char *buffer, int offset, size_t count) { struct onenand_chip *this = mtd->priv; void __iomem *bufferram; bufferram = this->base + area; bufferram += onenand_bufferram_offset(mtd, area); if (ONENAND_CHECK_BYTE_ACCESS(count)) { unsigned short word; /* Align with word(16-bit) size */ count--; /* Read word and save byte */ word = this->read_word(bufferram + offset + count); buffer[count] = (word & 0xff); } memcpy(buffer, bufferram + offset, count); return 0; } /** * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode * @param mtd MTD data structure * @param area BufferRAM area * @param buffer the databuffer to put/get data * @param offset offset to read from or write to * @param count number of bytes to read/write * * Read the BufferRAM area with Sync. Burst Mode */ static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area, unsigned char *buffer, int offset, size_t count) { struct onenand_chip *this = mtd->priv; void __iomem *bufferram; bufferram = this->base + area; bufferram += onenand_bufferram_offset(mtd, area); this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ); if (ONENAND_CHECK_BYTE_ACCESS(count)) { unsigned short word; /* Align with word(16-bit) size */ count--; /* Read word and save byte */ word = this->read_word(bufferram + offset + count); buffer[count] = (word & 0xff); } memcpy(buffer, bufferram + offset, count); this->mmcontrol(mtd, 0); return 0; } /** * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area * @param mtd MTD data structure * @param area BufferRAM area * @param buffer the databuffer to put/get data * @param offset offset to read from or write to * @param count number of bytes to read/write * * Write the BufferRAM area */ static int onenand_write_bufferram(struct mtd_info *mtd, int area, const unsigned char *buffer, int offset, size_t count) { struct onenand_chip *this = mtd->priv; void __iomem *bufferram; bufferram = this->base + area; bufferram += onenand_bufferram_offset(mtd, area); if (ONENAND_CHECK_BYTE_ACCESS(count)) { unsigned short word; int byte_offset; /* Align with word(16-bit) size */ count--; /* Calculate byte access offset */ byte_offset = offset + count; /* Read word and save byte */ word = this->read_word(bufferram + byte_offset); word = (word & ~0xff) | buffer[count]; this->write_word(word, bufferram + byte_offset); } memcpy(bufferram + offset, buffer, count); return 0; } /** * onenand_check_bufferram - [GENERIC] Check BufferRAM information * @param mtd MTD data structure * @param addr address to check * @return 1 if there are valid data, otherwise 0 * * Check bufferram if there is data we required */ static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr) { struct onenand_chip *this = mtd->priv; int block, page; int i; block = (int) (addr >> this->erase_shift); page = (int) (addr >> this->page_shift); page &= this->page_mask; i = ONENAND_CURRENT_BUFFERRAM(this); /* Is there valid data? */ if (this->bufferram[i].block == block && this->bufferram[i].page == page && this->bufferram[i].valid) return 1; return 0; } /** * onenand_update_bufferram - [GENERIC] Update BufferRAM information * @param mtd MTD data structure * @param addr address to update * @param valid valid flag * * Update BufferRAM information */ static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr, int valid) { struct onenand_chip *this = mtd->priv; int block, page; int i; block = (int) (addr >> this->erase_shift); page = (int) (addr >> this->page_shift); page &= this->page_mask; /* Invalidate BufferRAM */ for (i = 0; i < MAX_BUFFERRAM; i++) { if (this->bufferram[i].block == block && this->bufferram[i].page == page) this->bufferram[i].valid = 0; } /* Update BufferRAM */ i = ONENAND_CURRENT_BUFFERRAM(this); this->bufferram[i].block = block; this->bufferram[i].page = page; this->bufferram[i].valid = valid; return 0; } /** * onenand_get_device - [GENERIC] Get chip for selected access * @param mtd MTD device structure * @param new_state the state which is requested * * Get the device and lock it for exclusive access */ static int onenand_get_device(struct mtd_info *mtd, int new_state) { struct onenand_chip *this = mtd->priv; DECLARE_WAITQUEUE(wait, current); /* * Grab the lock and see if the device is available */ while (1) { spin_lock(&this->chip_lock); if (this->state == FL_READY) { this->state = new_state; spin_unlock(&this->chip_lock); break; } if (new_state == FL_PM_SUSPENDED) { spin_unlock(&this->chip_lock); return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN; } set_current_state(TASK_UNINTERRUPTIBLE); add_wait_queue(&this->wq, &wait); spin_unlock(&this->chip_lock); schedule(); remove_wait_queue(&this->wq, &wait); } return 0; } /** * onenand_release_device - [GENERIC] release chip * @param mtd MTD device structure * * Deselect, release chip lock and wake up anyone waiting on the device */ static void onenand_release_device(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; /* Release the chip */ spin_lock(&this->chip_lock); this->state = FL_READY; wake_up(&this->wq); spin_unlock(&this->chip_lock); } /** * onenand_read - [MTD Interface] Read data from flash * @param mtd MTD device structure * @param from offset to read from * @param len number of bytes to read * @param retlen pointer to variable to store the number of read bytes * @param buf the databuffer to put data * * Read with ecc */ static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct onenand_chip *this = mtd->priv; struct mtd_ecc_stats stats; int read = 0, column; int thislen; int ret = 0, boundary = 0; DEBUG(MTD_DEBUG_LEVEL3, "onenand_read: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); /* Do not allow reads past end of device */ if ((from + len) > mtd->size) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_read: Attempt read beyond end of device\n"); *retlen = 0; return -EINVAL; } /* Grab the lock and see if the device is available */ onenand_get_device(mtd, FL_READING); /* TODO handling oob */ stats = mtd->ecc_stats; /* Read-while-load method */ /* Do first load to bufferRAM */ if (read < len) { if (!onenand_check_bufferram(mtd, from)) { this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize); ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); } } thislen = min_t(int, mtd->writesize, len - read); column = from & (mtd->writesize - 1); if (column + thislen > mtd->writesize) thislen = mtd->writesize - column; while (!ret) { /* If there is more to load then start next load */ from += thislen; if (read + thislen < len) { this->command(mtd, ONENAND_CMD_READ, from, mtd->writesize); /* * Chip boundary handling in DDP * Now we issued chip 1 read and pointed chip 1 * bufferam so we have to point chip 0 bufferam. */ if (this->device_id & ONENAND_DEVICE_IS_DDP && unlikely(from == (this->chipsize >> 1))) { this->write_word(0, this->base + ONENAND_REG_START_ADDRESS2); boundary = 1; } else boundary = 0; ONENAND_SET_PREV_BUFFERRAM(this); } /* While load is going, read from last bufferRAM */ this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen); /* See if we are done */ read += thislen; if (read == len) break; /* Set up for next read from bufferRAM */ if (unlikely(boundary)) this->write_word(0x8000, this->base + ONENAND_REG_START_ADDRESS2); ONENAND_SET_NEXT_BUFFERRAM(this); buf += thislen; thislen = min_t(int, mtd->writesize, len - read); column = 0; cond_resched(); /* Now wait for load */ ret = this->wait(mtd, FL_READING); onenand_update_bufferram(mtd, from, !ret); } /* Deselect and wake up anyone waiting on the device */ onenand_release_device(mtd); /* * Return success, if no ECC failures, else -EBADMSG * fs driver will take care of that, because * retlen == desired len and result == -EBADMSG */ *retlen = read; if (mtd->ecc_stats.failed - stats.failed) return -EBADMSG; if (ret) return ret; return mtd->ecc_stats.corrected - stats.corrected ? -EUCLEAN : 0; } /** * onenand_do_read_oob - [MTD Interface] OneNAND read out-of-band * @param mtd MTD device structure * @param from offset to read from * @param len number of bytes to read * @param retlen pointer to variable to store the number of read bytes * @param buf the databuffer to put data * * OneNAND read out-of-band data from the spare area */ int onenand_do_read_oob(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct onenand_chip *this = mtd->priv; int read = 0, thislen, column; int ret = 0; DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len); /* Initialize return length value */ *retlen = 0; /* Do not allow reads past end of device */ if (unlikely((from + len) > mtd->size)) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempt read beyond end of device\n"); return -EINVAL; } /* Grab the lock and see if the device is available */ onenand_get_device(mtd, FL_READING); column = from & (mtd->oobsize - 1); while (read < len) { cond_resched(); thislen = mtd->oobsize - column; thislen = min_t(int, thislen, len); this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize); onenand_update_bufferram(mtd, from, 0); ret = this->wait(mtd, FL_READING); /* First copy data and check return value for ECC handling */ this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen); if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = 0x%x\n", ret); goto out; } read += thislen; if (read == len) break; buf += thislen; /* Read more? */ if (read < len) { /* Page size */ from += mtd->writesize; column = 0; } } out: /* Deselect and wake up anyone waiting on the device */ onenand_release_device(mtd); *retlen = read; return ret; } /** * onenand_read_oob - [MTD Interface] NAND write data and/or out-of-band * @mtd: MTD device structure * @from: offset to read from * @ops: oob operation description structure */ static int onenand_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { BUG_ON(ops->mode != MTD_OOB_PLACE); return onenand_do_read_oob(mtd, from + ops->ooboffs, ops->ooblen, &ops->oobretlen, ops->oobbuf); } #ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE /** * onenand_verify_oob - [GENERIC] verify the oob contents after a write * @param mtd MTD device structure * @param buf the databuffer to verify * @param to offset to read from * @param len number of bytes to read and compare * */ static int onenand_verify_oob(struct mtd_info *mtd, const u_char *buf, loff_t to, int len) { struct onenand_chip *this = mtd->priv; char *readp = this->page_buf; int column = to & (mtd->oobsize - 1); int status, i; this->command(mtd, ONENAND_CMD_READOOB, to, mtd->oobsize); onenand_update_bufferram(mtd, to, 0); status = this->wait(mtd, FL_READING); if (status) return status; this->read_bufferram(mtd, ONENAND_SPARERAM, readp, column, len); for(i = 0; i < len; i++) if (buf[i] != 0xFF && buf[i] != readp[i]) return -EBADMSG; return 0; } /** * onenand_verify_page - [GENERIC] verify the chip contents after a write * @param mtd MTD device structure * @param buf the databuffer to verify * * Check DataRAM area directly */ static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr) { struct onenand_chip *this = mtd->priv; void __iomem *dataram0, *dataram1; int ret = 0; /* In partial page write, just skip it */ if ((addr & (mtd->writesize - 1)) != 0) return 0; this->command(mtd, ONENAND_CMD_READ, addr, mtd->writesize); ret = this->wait(mtd, FL_READING); if (ret) return ret; onenand_update_bufferram(mtd, addr, 1); /* Check, if the two dataram areas are same */ dataram0 = this->base + ONENAND_DATARAM; dataram1 = dataram0 + mtd->writesize; if (memcmp(dataram0, dataram1, mtd->writesize)) return -EBADMSG; return 0; } #else #define onenand_verify_page(...) (0) #define onenand_verify_oob(...) (0) #endif #define NOTALIGNED(x) ((x & (this->subpagesize - 1)) != 0) /** * onenand_write - [MTD Interface] write buffer to FLASH * @param mtd MTD device structure * @param to offset to write to * @param len number of bytes to write * @param retlen pointer to variable to store the number of written bytes * @param buf the data to write * * Write with ECC */ static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { struct onenand_chip *this = mtd->priv; int written = 0; int ret = 0; int column, subpage; DEBUG(MTD_DEBUG_LEVEL3, "onenand_write: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); /* Initialize retlen, in case of early exit */ *retlen = 0; /* Do not allow writes past end of device */ if (unlikely((to + len) > mtd->size)) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt write to past end of device\n"); return -EINVAL; } /* Reject writes, which are not page aligned */ if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: Attempt to write not page aligned data\n"); return -EINVAL; } column = to & (mtd->writesize - 1); subpage = column || (len & (mtd->writesize - 1)); /* Grab the lock and see if the device is available */ onenand_get_device(mtd, FL_WRITING); /* Loop until all data write */ while (written < len) { int bytes = mtd->writesize; int thislen = min_t(int, bytes, len - written); u_char *wbuf = (u_char *) buf; cond_resched(); this->command(mtd, ONENAND_CMD_BUFFERRAM, to, bytes); /* Partial page write */ if (subpage) { bytes = min_t(int, bytes - column, (int) len); memset(this->page_buf, 0xff, mtd->writesize); memcpy(this->page_buf + column, buf, bytes); wbuf = this->page_buf; /* Even though partial write, we need page size */ thislen = mtd->writesize; } this->write_bufferram(mtd, ONENAND_DATARAM, wbuf, 0, thislen); this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize); this->command(mtd, ONENAND_CMD_PROG, to, mtd->writesize); /* In partial page write we don't update bufferram */ onenand_update_bufferram(mtd, to, !subpage); ret = this->wait(mtd, FL_WRITING); if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: write filaed %d\n", ret); break; } /* Only check verify write turn on */ ret = onenand_verify_page(mtd, (u_char *) wbuf, to); if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write: verify failed %d\n", ret); break; } written += thislen; if (written == len) break; column = 0; to += thislen; buf += thislen; } /* Deselect and wake up anyone waiting on the device */ onenand_release_device(mtd); *retlen = written; return ret; } /** * onenand_do_write_oob - [Internal] OneNAND write out-of-band * @param mtd MTD device structure * @param to offset to write to * @param len number of bytes to write * @param retlen pointer to variable to store the number of written bytes * @param buf the data to write * * OneNAND write out-of-band */ static int onenand_do_write_oob(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) { struct onenand_chip *this = mtd->priv; int column, ret = 0; int written = 0; DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len); /* Initialize retlen, in case of early exit */ *retlen = 0; /* Do not allow writes past end of device */ if (unlikely((to + len) > mtd->size)) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempt write to past end of device\n"); return -EINVAL; } /* Grab the lock and see if the device is available */ onenand_get_device(mtd, FL_WRITING); /* Loop until all data write */ while (written < len) { int thislen = min_t(int, mtd->oobsize, len - written); cond_resched(); column = to & (mtd->oobsize - 1); this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize); /* We send data to spare ram with oobsize * to prevent byte access */ memset(this->page_buf, 0xff, mtd->oobsize); memcpy(this->page_buf + column, buf, thislen); this->write_bufferram(mtd, ONENAND_SPARERAM, this->page_buf, 0, mtd->oobsize); this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize); onenand_update_bufferram(mtd, to, 0); ret = this->wait(mtd, FL_WRITING); if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: write filaed %d\n", ret); goto out; } ret = onenand_verify_oob(mtd, buf, to, thislen); if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: verify failed %d\n", ret); goto out; } written += thislen; if (written == len) break; to += thislen; buf += thislen; } out: /* Deselect and wake up anyone waiting on the device */ onenand_release_device(mtd); *retlen = written; return ret; } /** * onenand_write_oob - [MTD Interface] NAND write data and/or out-of-band * @mtd: MTD device structure * @from: offset to read from * @ops: oob operation description structure */ static int onenand_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops) { BUG_ON(ops->mode != MTD_OOB_PLACE); return onenand_do_write_oob(mtd, to + ops->ooboffs, ops->ooblen, &ops->oobretlen, ops->oobbuf); } /** * onenand_block_checkbad - [GENERIC] Check if a block is marked bad * @param mtd MTD device structure * @param ofs offset from device start * @param getchip 0, if the chip is already selected * @param allowbbt 1, if its allowed to access the bbt area * * Check, if the block is bad. Either by reading the bad block table or * calling of the scan function. */ static int onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt) { struct onenand_chip *this = mtd->priv; struct bbm_info *bbm = this->bbm; /* Return info from the table */ return bbm->isbad_bbt(mtd, ofs, allowbbt); } /** * onenand_erase - [MTD Interface] erase block(s) * @param mtd MTD device structure * @param instr erase instruction * * Erase one ore more blocks */ static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr) { struct onenand_chip *this = mtd->priv; unsigned int block_size; loff_t addr; int len; int ret = 0; DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len); block_size = (1 << this->erase_shift); /* Start address must align on block boundary */ if (unlikely(instr->addr & (block_size - 1))) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Unaligned address\n"); return -EINVAL; } /* Length must align on block boundary */ if (unlikely(instr->len & (block_size - 1))) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Length not block aligned\n"); return -EINVAL; } /* Do not allow erase past end of device */ if (unlikely((instr->len + instr->addr) > mtd->size)) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Erase past end of device\n"); return -EINVAL; } instr->fail_addr = 0xffffffff; /* Grab the lock and see if the device is available */ onenand_get_device(mtd, FL_ERASING); /* Loop throught the pages */ len = instr->len; addr = instr->addr; instr->state = MTD_ERASING; while (len) { cond_resched(); /* Check if we have a bad block, we do not erase bad blocks */ if (onenand_block_checkbad(mtd, addr, 0, 0)) { printk (KERN_WARNING "onenand_erase: attempt to erase a bad block at addr 0x%08x\n", (unsigned int) addr); instr->state = MTD_ERASE_FAILED; goto erase_exit; } this->command(mtd, ONENAND_CMD_ERASE, addr, block_size); ret = this->wait(mtd, FL_ERASING); /* Check, if it is write protected */ if (ret) { DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift)); instr->state = MTD_ERASE_FAILED; instr->fail_addr = addr; goto erase_exit; } len -= block_size; addr += block_size; } instr->state = MTD_ERASE_DONE; erase_exit: ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO; /* Do call back function */ if (!ret) mtd_erase_callback(instr); /* Deselect and wake up anyone waiting on the device */ onenand_release_device(mtd); return ret; } /** * onenand_sync - [MTD Interface] sync * @param mtd MTD device structure * * Sync is actually a wait for chip ready function */ static void onenand_sync(struct mtd_info *mtd) { DEBUG(MTD_DEBUG_LEVEL3, "onenand_sync: called\n"); /* Grab the lock and see if the device is available */ onenand_get_device(mtd, FL_SYNCING); /* Release it and go back */ onenand_release_device(mtd); } /** * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad * @param mtd MTD device structure * @param ofs offset relative to mtd start * * Check whether the block is bad */ static int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs) { /* Check for invalid offset */ if (ofs > mtd->size) return -EINVAL; return onenand_block_checkbad(mtd, ofs, 1, 0); } /** * onenand_default_block_markbad - [DEFAULT] mark a block bad * @param mtd MTD device structure * @param ofs offset from device start * * This is the default implementation, which can be overridden by * a hardware specific driver. */ static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) { struct onenand_chip *this = mtd->priv; struct bbm_info *bbm = this->bbm; u_char buf[2] = {0, 0}; size_t retlen; int block; /* Get block number */ block = ((int) ofs) >> bbm->bbt_erase_shift; if (bbm->bbt) bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1); /* We write two bytes, so we dont have to mess with 16 bit access */ ofs += mtd->oobsize + (bbm->badblockpos & ~0x01); return onenand_do_write_oob(mtd, ofs , 2, &retlen, buf); } /** * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad * @param mtd MTD device structure * @param ofs offset relative to mtd start * * Mark the block as bad */ static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs) { struct onenand_chip *this = mtd->priv; int ret; ret = onenand_block_isbad(mtd, ofs); if (ret) { /* If it was bad already, return success and do nothing */ if (ret > 0) return 0; return ret; } return this->block_markbad(mtd, ofs); } /** * onenand_do_lock_cmd - [OneNAND Interface] Lock or unlock block(s) * @param mtd MTD device structure * @param ofs offset relative to mtd start * @param len number of bytes to lock or unlock * * Lock or unlock one or more blocks */ static int onenand_do_lock_cmd(struct mtd_info *mtd, loff_t ofs, size_t len, int cmd) { struct onenand_chip *this = mtd->priv; int start, end, block, value, status; int wp_status_mask; start = ofs >> this->erase_shift; end = len >> this->erase_shift; if (cmd == ONENAND_CMD_LOCK) wp_status_mask = ONENAND_WP_LS; else wp_status_mask = ONENAND_WP_US; /* Continuous lock scheme */ if (this->options & ONENAND_HAS_CONT_LOCK) { /* Set start block address */ this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS); /* Set end block address */ this->write_word(start + end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS); /* Write lock command */ this->command(mtd, cmd, 0, 0); /* There's no return value */ this->wait(mtd, FL_LOCKING); /* Sanity check */ while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) & ONENAND_CTRL_ONGO) continue; /* Check lock status */ status = this->read_word(this->base + ONENAND_REG_WP_STATUS); if (!(status & wp_status_mask)) printk(KERN_ERR "wp status = 0x%x\n", status); return 0; } /* Block lock scheme */ for (block = start; block < start + end; block++) { /* Set block address */ value = onenand_block_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); /* Select DataRAM for DDP */ value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); /* Set start block address */ this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS); /* Write lock command */ this->command(mtd, cmd, 0, 0); /* There's no return value */ this->wait(mtd, FL_LOCKING); /* Sanity check */ while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) & ONENAND_CTRL_ONGO) continue; /* Check lock status */ status = this->read_word(this->base + ONENAND_REG_WP_STATUS); if (!(status & wp_status_mask)) printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status); } return 0; } /** * onenand_lock - [MTD Interface] Lock block(s) * @param mtd MTD device structure * @param ofs offset relative to mtd start * @param len number of bytes to unlock * * Lock one or more blocks */ static int onenand_lock(struct mtd_info *mtd, loff_t ofs, size_t len) { return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_LOCK); } /** * onenand_unlock - [MTD Interface] Unlock block(s) * @param mtd MTD device structure * @param ofs offset relative to mtd start * @param len number of bytes to unlock * * Unlock one or more blocks */ static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len) { return onenand_do_lock_cmd(mtd, ofs, len, ONENAND_CMD_UNLOCK); } /** * onenand_check_lock_status - [OneNAND Interface] Check lock status * @param this onenand chip data structure * * Check lock status */ static void onenand_check_lock_status(struct onenand_chip *this) { unsigned int value, block, status; unsigned int end; end = this->chipsize >> this->erase_shift; for (block = 0; block < end; block++) { /* Set block address */ value = onenand_block_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1); /* Select DataRAM for DDP */ value = onenand_bufferram_address(this, block); this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2); /* Set start block address */ this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS); /* Check lock status */ status = this->read_word(this->base + ONENAND_REG_WP_STATUS); if (!(status & ONENAND_WP_US)) printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status); } } /** * onenand_unlock_all - [OneNAND Interface] unlock all blocks * @param mtd MTD device structure * * Unlock all blocks */ static int onenand_unlock_all(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; if (this->options & ONENAND_HAS_UNLOCK_ALL) { /* Set start block address */ this->write_word(0, this->base + ONENAND_REG_START_BLOCK_ADDRESS); /* Write unlock command */ this->command(mtd, ONENAND_CMD_UNLOCK_ALL, 0, 0); /* There's no return value */ this->wait(mtd, FL_LOCKING); /* Sanity check */ while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS) & ONENAND_CTRL_ONGO) continue; /* Workaround for all block unlock in DDP */ if (this->device_id & ONENAND_DEVICE_IS_DDP) { /* 1st block on another chip */ loff_t ofs = this->chipsize >> 1; size_t len = mtd->erasesize; onenand_unlock(mtd, ofs, len); } onenand_check_lock_status(this); return 0; } onenand_unlock(mtd, 0x0, this->chipsize); return 0; } #ifdef CONFIG_MTD_ONENAND_OTP /* Interal OTP operation */ typedef int (*otp_op_t)(struct mtd_info *mtd, loff_t form, size_t len, size_t *retlen, u_char *buf); /** * do_otp_read - [DEFAULT] Read OTP block area * @param mtd MTD device structure * @param from The offset to read * @param len number of bytes to read * @param retlen pointer to variable to store the number of readbytes * @param buf the databuffer to put/get data * * Read OTP block area. */ static int do_otp_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct onenand_chip *this = mtd->priv; int ret; /* Enter OTP access mode */ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); this->wait(mtd, FL_OTPING); ret = mtd->read(mtd, from, len, retlen, buf); /* Exit OTP access mode */ this->command(mtd, ONENAND_CMD_RESET, 0, 0); this->wait(mtd, FL_RESETING); return ret; } /** * do_otp_write - [DEFAULT] Write OTP block area * @param mtd MTD device structure * @param from The offset to write * @param len number of bytes to write * @param retlen pointer to variable to store the number of write bytes * @param buf the databuffer to put/get data * * Write OTP block area. */ static int do_otp_write(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct onenand_chip *this = mtd->priv; unsigned char *pbuf = buf; int ret; /* Force buffer page aligned */ if (len < mtd->writesize) { memcpy(this->page_buf, buf, len); memset(this->page_buf + len, 0xff, mtd->writesize - len); pbuf = this->page_buf; len = mtd->writesize; } /* Enter OTP access mode */ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); this->wait(mtd, FL_OTPING); ret = mtd->write(mtd, from, len, retlen, pbuf); /* Exit OTP access mode */ this->command(mtd, ONENAND_CMD_RESET, 0, 0); this->wait(mtd, FL_RESETING); return ret; } /** * do_otp_lock - [DEFAULT] Lock OTP block area * @param mtd MTD device structure * @param from The offset to lock * @param len number of bytes to lock * @param retlen pointer to variable to store the number of lock bytes * @param buf the databuffer to put/get data * * Lock OTP block area. */ static int do_otp_lock(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { struct onenand_chip *this = mtd->priv; int ret; /* Enter OTP access mode */ this->command(mtd, ONENAND_CMD_OTP_ACCESS, 0, 0); this->wait(mtd, FL_OTPING); ret = onenand_do_write_oob(mtd, from, len, retlen, buf); /* Exit OTP access mode */ this->command(mtd, ONENAND_CMD_RESET, 0, 0); this->wait(mtd, FL_RESETING); return ret; } /** * onenand_otp_walk - [DEFAULT] Handle OTP operation * @param mtd MTD device structure * @param from The offset to read/write * @param len number of bytes to read/write * @param retlen pointer to variable to store the number of read bytes * @param buf the databuffer to put/get data * @param action do given action * @param mode specify user and factory * * Handle OTP operation. */ static int onenand_otp_walk(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, otp_op_t action, int mode) { struct onenand_chip *this = mtd->priv; int otp_pages; int density; int ret = 0; *retlen = 0; density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; if (density < ONENAND_DEVICE_DENSITY_512Mb) otp_pages = 20; else otp_pages = 10; if (mode == MTD_OTP_FACTORY) { from += mtd->writesize * otp_pages; otp_pages = 64 - otp_pages; } /* Check User/Factory boundary */ if (((mtd->writesize * otp_pages) - (from + len)) < 0) return 0; while (len > 0 && otp_pages > 0) { if (!action) { /* OTP Info functions */ struct otp_info *otpinfo; len -= sizeof(struct otp_info); if (len <= 0) return -ENOSPC; otpinfo = (struct otp_info *) buf; otpinfo->start = from; otpinfo->length = mtd->writesize; otpinfo->locked = 0; from += mtd->writesize; buf += sizeof(struct otp_info); *retlen += sizeof(struct otp_info); } else { size_t tmp_retlen; int size = len; ret = action(mtd, from, len, &tmp_retlen, buf); buf += size; len -= size; *retlen += size; if (ret < 0) return ret; } otp_pages--; } return 0; } /** * onenand_get_fact_prot_info - [MTD Interface] Read factory OTP info * @param mtd MTD device structure * @param buf the databuffer to put/get data * @param len number of bytes to read * * Read factory OTP info. */ static int onenand_get_fact_prot_info(struct mtd_info *mtd, struct otp_info *buf, size_t len) { size_t retlen; int ret; ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_FACTORY); return ret ? : retlen; } /** * onenand_read_fact_prot_reg - [MTD Interface] Read factory OTP area * @param mtd MTD device structure * @param from The offset to read * @param len number of bytes to read * @param retlen pointer to variable to store the number of read bytes * @param buf the databuffer to put/get data * * Read factory OTP area. */ static int onenand_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_FACTORY); } /** * onenand_get_user_prot_info - [MTD Interface] Read user OTP info * @param mtd MTD device structure * @param buf the databuffer to put/get data * @param len number of bytes to read * * Read user OTP info. */ static int onenand_get_user_prot_info(struct mtd_info *mtd, struct otp_info *buf, size_t len) { size_t retlen; int ret; ret = onenand_otp_walk(mtd, 0, len, &retlen, (u_char *) buf, NULL, MTD_OTP_USER); return ret ? : retlen; } /** * onenand_read_user_prot_reg - [MTD Interface] Read user OTP area * @param mtd MTD device structure * @param from The offset to read * @param len number of bytes to read * @param retlen pointer to variable to store the number of read bytes * @param buf the databuffer to put/get data * * Read user OTP area. */ static int onenand_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_read, MTD_OTP_USER); } /** * onenand_write_user_prot_reg - [MTD Interface] Write user OTP area * @param mtd MTD device structure * @param from The offset to write * @param len number of bytes to write * @param retlen pointer to variable to store the number of write bytes * @param buf the databuffer to put/get data * * Write user OTP area. */ static int onenand_write_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) { return onenand_otp_walk(mtd, from, len, retlen, buf, do_otp_write, MTD_OTP_USER); } /** * onenand_lock_user_prot_reg - [MTD Interface] Lock user OTP area * @param mtd MTD device structure * @param from The offset to lock * @param len number of bytes to unlock * * Write lock mark on spare area in page 0 in OTP block */ static int onenand_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len) { unsigned char oob_buf[64]; size_t retlen; int ret; memset(oob_buf, 0xff, mtd->oobsize); /* * Note: OTP lock operation * OTP block : 0xXXFC * 1st block : 0xXXF3 (If chip support) * Both : 0xXXF0 (If chip support) */ oob_buf[ONENAND_OTP_LOCK_OFFSET] = 0xFC; /* * Write lock mark to 8th word of sector0 of page0 of the spare0. * We write 16 bytes spare area instead of 2 bytes. */ from = 0; len = 16; ret = onenand_otp_walk(mtd, from, len, &retlen, oob_buf, do_otp_lock, MTD_OTP_USER); return ret ? : retlen; } #endif /* CONFIG_MTD_ONENAND_OTP */ /** * onenand_lock_scheme - Check and set OneNAND lock scheme * @param mtd MTD data structure * * Check and set OneNAND lock scheme */ static void onenand_lock_scheme(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; unsigned int density, process; /* Lock scheme depends on density and process */ density = this->device_id >> ONENAND_DEVICE_DENSITY_SHIFT; process = this->version_id >> ONENAND_VERSION_PROCESS_SHIFT; /* Lock scheme */ if (density >= ONENAND_DEVICE_DENSITY_1Gb) { /* A-Die has all block unlock */ if (process) { printk(KERN_DEBUG "Chip support all block unlock\n"); this->options |= ONENAND_HAS_UNLOCK_ALL; } } else { /* Some OneNAND has continues lock scheme */ if (!process) { printk(KERN_DEBUG "Lock scheme is Continues Lock\n"); this->options |= ONENAND_HAS_CONT_LOCK; } } } /** * onenand_print_device_info - Print device ID * @param device device ID * * Print device ID */ static void onenand_print_device_info(int device, int version) { int vcc, demuxed, ddp, density; vcc = device & ONENAND_DEVICE_VCC_MASK; demuxed = device & ONENAND_DEVICE_IS_DEMUX; ddp = device & ONENAND_DEVICE_IS_DDP; density = device >> ONENAND_DEVICE_DENSITY_SHIFT; printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n", demuxed ? "" : "Muxed ", ddp ? "(DDP)" : "", (16 << density), vcc ? "2.65/3.3" : "1.8", device); printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version); } static const struct onenand_manufacturers onenand_manuf_ids[] = { {ONENAND_MFR_SAMSUNG, "Samsung"}, }; /** * onenand_check_maf - Check manufacturer ID * @param manuf manufacturer ID * * Check manufacturer ID */ static int onenand_check_maf(int manuf) { int size = ARRAY_SIZE(onenand_manuf_ids); char *name; int i; for (i = 0; i < size; i++) if (manuf == onenand_manuf_ids[i].id) break; if (i < size) name = onenand_manuf_ids[i].name; else name = "Unknown"; printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n", name, manuf); return (i == size); } /** * onenand_probe - [OneNAND Interface] Probe the OneNAND device * @param mtd MTD device structure * * OneNAND detection method: * Compare the the values from command with ones from register */ static int onenand_probe(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; int bram_maf_id, bram_dev_id, maf_id, dev_id, ver_id; int density; int syscfg; /* Save system configuration 1 */ syscfg = this->read_word(this->base + ONENAND_REG_SYS_CFG1); /* Clear Sync. Burst Read mode to read BootRAM */ this->write_word((syscfg & ~ONENAND_SYS_CFG1_SYNC_READ), this->base + ONENAND_REG_SYS_CFG1); /* Send the command for reading device ID from BootRAM */ this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM); /* Read manufacturer and device IDs from BootRAM */ bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0); bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2); /* Reset OneNAND to read default register values */ this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM); /* Wait reset */ this->wait(mtd, FL_RESETING); /* Restore system configuration 1 */ this->write_word(syscfg, this->base + ONENAND_REG_SYS_CFG1); /* Check manufacturer ID */ if (onenand_check_maf(bram_maf_id)) return -ENXIO; /* Read manufacturer and device IDs from Register */ maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID); dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID); ver_id = this->read_word(this->base + ONENAND_REG_VERSION_ID); /* Check OneNAND device */ if (maf_id != bram_maf_id || dev_id != bram_dev_id) return -ENXIO; /* Flash device information */ onenand_print_device_info(dev_id, ver_id); this->device_id = dev_id; this->version_id = ver_id; density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; this->chipsize = (16 << density) << 20; /* Set density mask. it is used for DDP */ this->density_mask = (1 << (density + 6)); /* OneNAND page size & block size */ /* The data buffer size is equal to page size */ mtd->writesize = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE); mtd->oobsize = mtd->writesize >> 5; /* Pagers per block is always 64 in OneNAND */ mtd->erasesize = mtd->writesize << 6; this->erase_shift = ffs(mtd->erasesize) - 1; this->page_shift = ffs(mtd->writesize) - 1; this->ppb_shift = (this->erase_shift - this->page_shift); this->page_mask = (mtd->erasesize / mtd->writesize) - 1; /* REVIST: Multichip handling */ mtd->size = this->chipsize; /* Check OneNAND lock scheme */ onenand_lock_scheme(mtd); return 0; } /** * onenand_suspend - [MTD Interface] Suspend the OneNAND flash * @param mtd MTD device structure */ static int onenand_suspend(struct mtd_info *mtd) { return onenand_get_device(mtd, FL_PM_SUSPENDED); } /** * onenand_resume - [MTD Interface] Resume the OneNAND flash * @param mtd MTD device structure */ static void onenand_resume(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; if (this->state == FL_PM_SUSPENDED) onenand_release_device(mtd); else printk(KERN_ERR "resume() called for the chip which is not" "in suspended state\n"); } /** * onenand_scan - [OneNAND Interface] Scan for the OneNAND device * @param mtd MTD device structure * @param maxchips Number of chips to scan for * * This fills out all the not initialized function pointers * with the defaults. * The flash ID is read and the mtd/chip structures are * filled with the appropriate values. */ int onenand_scan(struct mtd_info *mtd, int maxchips) { struct onenand_chip *this = mtd->priv; if (!this->read_word) this->read_word = onenand_readw; if (!this->write_word) this->write_word = onenand_writew; if (!this->command) this->command = onenand_command; if (!this->wait) onenand_setup_wait(mtd); if (!this->read_bufferram) this->read_bufferram = onenand_read_bufferram; if (!this->write_bufferram) this->write_bufferram = onenand_write_bufferram; if (!this->block_markbad) this->block_markbad = onenand_default_block_markbad; if (!this->scan_bbt) this->scan_bbt = onenand_default_bbt; if (onenand_probe(mtd)) return -ENXIO; /* Set Sync. Burst Read after probing */ if (this->mmcontrol) { printk(KERN_INFO "OneNAND Sync. Burst Read support\n"); this->read_bufferram = onenand_sync_read_bufferram; } /* Allocate buffers, if necessary */ if (!this->page_buf) { size_t len; len = mtd->writesize + mtd->oobsize; this->page_buf = kmalloc(len, GFP_KERNEL); if (!this->page_buf) { printk(KERN_ERR "onenand_scan(): Can't allocate page_buf\n"); return -ENOMEM; } this->options |= ONENAND_PAGEBUF_ALLOC; } this->state = FL_READY; init_waitqueue_head(&this->wq); spin_lock_init(&this->chip_lock); /* * Allow subpage writes up to oobsize. */ switch (mtd->oobsize) { case 64: this->ecclayout = &onenand_oob_64; mtd->subpage_sft = 2; break; case 32: this->ecclayout = &onenand_oob_32; mtd->subpage_sft = 1; break; default: printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n", mtd->oobsize); mtd->subpage_sft = 0; /* To prevent kernel oops */ this->ecclayout = &onenand_oob_32; break; } this->subpagesize = mtd->writesize >> mtd->subpage_sft; mtd->ecclayout = this->ecclayout; /* Fill in remaining MTD driver data */ mtd->type = MTD_NANDFLASH; mtd->flags = MTD_CAP_NANDFLASH; mtd->ecctype = MTD_ECC_SW; mtd->erase = onenand_erase; mtd->point = NULL; mtd->unpoint = NULL; mtd->read = onenand_read; mtd->write = onenand_write; mtd->read_oob = onenand_read_oob; mtd->write_oob = onenand_write_oob; #ifdef CONFIG_MTD_ONENAND_OTP mtd->get_fact_prot_info = onenand_get_fact_prot_info; mtd->read_fact_prot_reg = onenand_read_fact_prot_reg; mtd->get_user_prot_info = onenand_get_user_prot_info; mtd->read_user_prot_reg = onenand_read_user_prot_reg; mtd->write_user_prot_reg = onenand_write_user_prot_reg; mtd->lock_user_prot_reg = onenand_lock_user_prot_reg; #endif mtd->sync = onenand_sync; mtd->lock = onenand_lock; mtd->unlock = onenand_unlock; mtd->suspend = onenand_suspend; mtd->resume = onenand_resume; mtd->block_isbad = onenand_block_isbad; mtd->block_markbad = onenand_block_markbad; mtd->owner = THIS_MODULE; /* Unlock whole block */ onenand_unlock_all(mtd); return this->scan_bbt(mtd); } /** * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device * @param mtd MTD device structure */ void onenand_release(struct mtd_info *mtd) { struct onenand_chip *this = mtd->priv; #ifdef CONFIG_MTD_PARTITIONS /* Deregister partitions */ del_mtd_partitions (mtd); #endif /* Deregister the device */ del_mtd_device (mtd); /* Free bad block table memory, if allocated */ if (this->bbm) kfree(this->bbm); /* Buffer allocated by onenand_scan */ if (this->options & ONENAND_PAGEBUF_ALLOC) kfree(this->page_buf); } EXPORT_SYMBOL_GPL(onenand_scan); EXPORT_SYMBOL_GPL(onenand_release); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Kyungmin Park "); MODULE_DESCRIPTION("Generic OneNAND flash driver code");