S: Maintained
F: arch/arm/mach-bcmring
-ARM/BCMRING MTD NAND DRIVER
-M: Jiandong Zheng <jdzheng@broadcom.com>
-M: Scott Branden <sbranden@broadcom.com>
-L: linux-mtd@lists.infradead.org
-S: Maintained
-F: drivers/mtd/nand/bcm_umi_nand.c
-F: drivers/mtd/nand/bcm_umi_bch.c
-F: drivers/mtd/nand/nand_bcm_umi.h
-
ARM/CALXEDA HIGHBANK ARCHITECTURE
M: Rob Herring <rob.herring@calxeda.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
when the is NAND chip selected or released, but will save
approximately 5mA of power when there is nothing happening.
-config MTD_NAND_BCM_UMI
- tristate "NAND Flash support for BCM Reference Boards"
- depends on ARCH_BCMRING
- help
- This enables the NAND flash controller on the BCM UMI block.
-
- No board specific support is done by this driver, each board
- must advertise a platform_device for the driver to attach.
-
-config MTD_NAND_BCM_UMI_HWCS
- bool "BCM UMI NAND Hardware CS"
- depends on MTD_NAND_BCM_UMI
- help
- Enable the use of the BCM UMI block's internal CS using NAND.
- This should only be used if you know the external NAND CS can toggle.
-
config MTD_NAND_DISKONCHIP
tristate "DiskOnChip 2000, Millennium and Millennium Plus (NAND reimplementation) (EXPERIMENTAL)"
depends on EXPERIMENTAL
obj-$(CONFIG_MTD_NAND_TXX9NDFMC) += txx9ndfmc.o
obj-$(CONFIG_MTD_NAND_NUC900) += nuc900_nand.o
obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o
-obj-$(CONFIG_MTD_NAND_BCM_UMI) += bcm_umi_nand.o nand_bcm_umi.o
obj-$(CONFIG_MTD_NAND_MPC5121_NFC) += mpc5121_nfc.o
obj-$(CONFIG_MTD_NAND_RICOH) += r852.o
obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
+++ /dev/null
-/*****************************************************************************
-* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-#include "nand_bcm_umi.h"
-
-/* ---- External Variable Declarations ----------------------------------- */
-/* ---- External Function Prototypes ------------------------------------- */
-/* ---- Public Variables ------------------------------------------------- */
-/* ---- Private Constants and Types -------------------------------------- */
-
-/* ---- Private Function Prototypes -------------------------------------- */
-static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
- struct nand_chip *chip, uint8_t *buf, int oob_required, int page);
-static int bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
- struct nand_chip *chip, const uint8_t *buf, int oob_required);
-
-/* ---- Private Variables ------------------------------------------------ */
-
-/*
-** nand_hw_eccoob
-** New oob placement block for use with hardware ecc generation.
-*/
-static struct nand_ecclayout nand_hw_eccoob_512 = {
- /* Reserve 5 for BI indicator */
- .oobfree = {
-#if (NAND_ECC_NUM_BYTES > 3)
- {.offset = 0, .length = 2}
-#else
- {.offset = 0, .length = 5},
- {.offset = 6, .length = 7}
-#endif
- }
-};
-
-/*
-** We treat the OOB for a 2K page as if it were 4 512 byte oobs,
-** except the BI is at byte 0.
-*/
-static struct nand_ecclayout nand_hw_eccoob_2048 = {
- /* Reserve 0 as BI indicator */
- .oobfree = {
-#if (NAND_ECC_NUM_BYTES > 10)
- {.offset = 1, .length = 2},
-#elif (NAND_ECC_NUM_BYTES > 7)
- {.offset = 1, .length = 5},
- {.offset = 16, .length = 6},
- {.offset = 32, .length = 6},
- {.offset = 48, .length = 6}
-#else
- {.offset = 1, .length = 8},
- {.offset = 16, .length = 9},
- {.offset = 32, .length = 9},
- {.offset = 48, .length = 9}
-#endif
- }
-};
-
-/* We treat the OOB for a 4K page as if it were 8 512 byte oobs,
- * except the BI is at byte 0. */
-static struct nand_ecclayout nand_hw_eccoob_4096 = {
- /* Reserve 0 as BI indicator */
- .oobfree = {
-#if (NAND_ECC_NUM_BYTES > 10)
- {.offset = 1, .length = 2},
- {.offset = 16, .length = 3},
- {.offset = 32, .length = 3},
- {.offset = 48, .length = 3},
- {.offset = 64, .length = 3},
- {.offset = 80, .length = 3},
- {.offset = 96, .length = 3},
- {.offset = 112, .length = 3}
-#else
- {.offset = 1, .length = 5},
- {.offset = 16, .length = 6},
- {.offset = 32, .length = 6},
- {.offset = 48, .length = 6},
- {.offset = 64, .length = 6},
- {.offset = 80, .length = 6},
- {.offset = 96, .length = 6},
- {.offset = 112, .length = 6}
-#endif
- }
-};
-
-/* ---- Private Functions ------------------------------------------------ */
-/* ==== Public Functions ================================================= */
-
-/****************************************************************************
-*
-* bcm_umi_bch_read_page_hwecc - hardware ecc based page read function
-* @mtd: mtd info structure
-* @chip: nand chip info structure
-* @buf: buffer to store read data
-* @oob_required: caller expects OOB data read to chip->oob_poi
-*
-***************************************************************************/
-static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
- struct nand_chip *chip, uint8_t * buf,
- int oob_required, int page)
-{
- int sectorIdx = 0;
- int eccsize = chip->ecc.size;
- int eccsteps = chip->ecc.steps;
- uint8_t *datap = buf;
- uint8_t eccCalc[NAND_ECC_NUM_BYTES];
- int sectorOobSize = mtd->oobsize / eccsteps;
- int stat;
- unsigned int max_bitflips = 0;
-
- for (sectorIdx = 0; sectorIdx < eccsteps;
- sectorIdx++, datap += eccsize) {
- if (sectorIdx > 0) {
- /* Seek to page location within sector */
- chip->cmdfunc(mtd, NAND_CMD_RNDOUT, sectorIdx * eccsize,
- -1);
- }
-
- /* Enable hardware ECC before reading the buf */
- nand_bcm_umi_bch_enable_read_hwecc();
-
- /* Read in data */
- bcm_umi_nand_read_buf(mtd, datap, eccsize);
-
- /* Pause hardware ECC after reading the buf */
- nand_bcm_umi_bch_pause_read_ecc_calc();
-
- /* Read the OOB ECC */
- chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
- mtd->writesize + sectorIdx * sectorOobSize, -1);
- nand_bcm_umi_bch_read_oobEcc(mtd->writesize, eccCalc,
- NAND_ECC_NUM_BYTES,
- chip->oob_poi +
- sectorIdx * sectorOobSize);
-
- /* Correct any ECC detected errors */
- stat =
- nand_bcm_umi_bch_correct_page(datap, eccCalc,
- NAND_ECC_NUM_BYTES);
-
- /* Update Stats */
- if (stat < 0) {
-#if defined(NAND_BCM_UMI_DEBUG)
- printk(KERN_WARNING "%s uncorr_err sectorIdx=%d\n",
- __func__, sectorIdx);
- printk(KERN_WARNING "%s data %*ph\n",
- __func__, 8, datap);
- printk(KERN_WARNING "%s ecc %*ph\n",
- __func__, 13, eccCalc);
- BUG();
-#endif
- mtd->ecc_stats.failed++;
- } else {
-#if defined(NAND_BCM_UMI_DEBUG)
- if (stat > 0) {
- printk(KERN_INFO
- "%s %d correctable_errors detected\n",
- __func__, stat);
- }
-#endif
- mtd->ecc_stats.corrected += stat;
- max_bitflips = max_t(unsigned int, max_bitflips, stat);
- }
- }
- return max_bitflips;
-}
-
-/****************************************************************************
-*
-* bcm_umi_bch_write_page_hwecc - hardware ecc based page write function
-* @mtd: mtd info structure
-* @chip: nand chip info structure
-* @buf: data buffer
-* @oob_required: must write chip->oob_poi to OOB
-*
-***************************************************************************/
-static int bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
- struct nand_chip *chip, const uint8_t *buf, int oob_required)
-{
- int sectorIdx = 0;
- int eccsize = chip->ecc.size;
- int eccsteps = chip->ecc.steps;
- const uint8_t *datap = buf;
- uint8_t *oobp = chip->oob_poi;
- int sectorOobSize = mtd->oobsize / eccsteps;
-
- for (sectorIdx = 0; sectorIdx < eccsteps;
- sectorIdx++, datap += eccsize, oobp += sectorOobSize) {
- /* Enable hardware ECC before writing the buf */
- nand_bcm_umi_bch_enable_write_hwecc();
- bcm_umi_nand_write_buf(mtd, datap, eccsize);
- nand_bcm_umi_bch_write_oobEcc(mtd->writesize, oobp,
- NAND_ECC_NUM_BYTES);
- }
-
- bcm_umi_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
-
- return 0;
-}
+++ /dev/null
-/*****************************************************************************
-* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/ioport.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/nand_ecc.h>
-#include <linux/mtd/partitions.h>
-
-#include <asm/mach-types.h>
-
-#include <mach/reg_nand.h>
-#include <mach/reg_umi.h>
-
-#include "nand_bcm_umi.h"
-
-#include <mach/memory_settings.h>
-
-#define USE_DMA 1
-#include <mach/dma.h>
-#include <linux/dma-mapping.h>
-#include <linux/completion.h>
-
-/* ---- External Variable Declarations ----------------------------------- */
-/* ---- External Function Prototypes ------------------------------------- */
-/* ---- Public Variables ------------------------------------------------- */
-/* ---- Private Constants and Types -------------------------------------- */
-static const __devinitconst char gBanner[] = KERN_INFO \
- "BCM UMI MTD NAND Driver: 1.00\n";
-
-#if NAND_ECC_BCH
-static uint8_t scan_ff_pattern[] = { 0xff };
-
-static struct nand_bbt_descr largepage_bbt = {
- .options = 0,
- .offs = 0,
- .len = 1,
- .pattern = scan_ff_pattern
-};
-#endif
-
-/*
-** Preallocate a buffer to avoid having to do this every dma operation.
-** This is the size of the preallocated coherent DMA buffer.
-*/
-#if USE_DMA
-#define DMA_MIN_BUFLEN 512
-#define DMA_MAX_BUFLEN PAGE_SIZE
-#define USE_DIRECT_IO(len) (((len) < DMA_MIN_BUFLEN) || \
- ((len) > DMA_MAX_BUFLEN))
-
-/*
- * The current NAND data space goes from 0x80001900 to 0x80001FFF,
- * which is only 0x700 = 1792 bytes long. This is too small for 2K, 4K page
- * size NAND flash. Need to break the DMA down to multiple 1Ks.
- *
- * Need to make sure REG_NAND_DATA_PADDR + DMA_MAX_LEN < 0x80002000
- */
-#define DMA_MAX_LEN 1024
-
-#else /* !USE_DMA */
-#define DMA_MIN_BUFLEN 0
-#define DMA_MAX_BUFLEN 0
-#define USE_DIRECT_IO(len) 1
-#endif
-/* ---- Private Function Prototypes -------------------------------------- */
-static void bcm_umi_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len);
-static void bcm_umi_nand_write_buf(struct mtd_info *mtd, const u_char * buf,
- int len);
-
-/* ---- Private Variables ------------------------------------------------ */
-static struct mtd_info *board_mtd;
-static void __iomem *bcm_umi_io_base;
-static void *virtPtr;
-static dma_addr_t physPtr;
-static struct completion nand_comp;
-
-/* ---- Private Functions ------------------------------------------------ */
-#if NAND_ECC_BCH
-#include "bcm_umi_bch.c"
-#else
-#include "bcm_umi_hamming.c"
-#endif
-
-#if USE_DMA
-
-/* Handler called when the DMA finishes. */
-static void nand_dma_handler(DMA_Device_t dev, int reason, void *userData)
-{
- complete(&nand_comp);
-}
-
-static int nand_dma_init(void)
-{
- int rc;
-
- rc = dma_set_device_handler(DMA_DEVICE_NAND_MEM_TO_MEM,
- nand_dma_handler, NULL);
- if (rc != 0) {
- printk(KERN_ERR "dma_set_device_handler failed: %d\n", rc);
- return rc;
- }
-
- virtPtr =
- dma_alloc_coherent(NULL, DMA_MAX_BUFLEN, &physPtr, GFP_KERNEL);
- if (virtPtr == NULL) {
- printk(KERN_ERR "NAND - Failed to allocate memory for DMA buffer\n");
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static void nand_dma_term(void)
-{
- if (virtPtr != NULL)
- dma_free_coherent(NULL, DMA_MAX_BUFLEN, virtPtr, physPtr);
-}
-
-static void nand_dma_read(void *buf, int len)
-{
- int offset = 0;
- int tmp_len = 0;
- int len_left = len;
- DMA_Handle_t hndl;
-
- if (virtPtr == NULL)
- panic("nand_dma_read: virtPtr == NULL\n");
-
- if ((void *)physPtr == NULL)
- panic("nand_dma_read: physPtr == NULL\n");
-
- hndl = dma_request_channel(DMA_DEVICE_NAND_MEM_TO_MEM);
- if (hndl < 0) {
- printk(KERN_ERR
- "nand_dma_read: unable to allocate dma channel: %d\n",
- (int)hndl);
- panic("\n");
- }
-
- while (len_left > 0) {
- if (len_left > DMA_MAX_LEN) {
- tmp_len = DMA_MAX_LEN;
- len_left -= DMA_MAX_LEN;
- } else {
- tmp_len = len_left;
- len_left = 0;
- }
-
- init_completion(&nand_comp);
- dma_transfer_mem_to_mem(hndl, REG_NAND_DATA_PADDR,
- physPtr + offset, tmp_len);
- wait_for_completion(&nand_comp);
-
- offset += tmp_len;
- }
-
- dma_free_channel(hndl);
-
- if (buf != NULL)
- memcpy(buf, virtPtr, len);
-}
-
-static void nand_dma_write(const void *buf, int len)
-{
- int offset = 0;
- int tmp_len = 0;
- int len_left = len;
- DMA_Handle_t hndl;
-
- if (buf == NULL)
- panic("nand_dma_write: buf == NULL\n");
-
- if (virtPtr == NULL)
- panic("nand_dma_write: virtPtr == NULL\n");
-
- if ((void *)physPtr == NULL)
- panic("nand_dma_write: physPtr == NULL\n");
-
- memcpy(virtPtr, buf, len);
-
-
- hndl = dma_request_channel(DMA_DEVICE_NAND_MEM_TO_MEM);
- if (hndl < 0) {
- printk(KERN_ERR
- "nand_dma_write: unable to allocate dma channel: %d\n",
- (int)hndl);
- panic("\n");
- }
-
- while (len_left > 0) {
- if (len_left > DMA_MAX_LEN) {
- tmp_len = DMA_MAX_LEN;
- len_left -= DMA_MAX_LEN;
- } else {
- tmp_len = len_left;
- len_left = 0;
- }
-
- init_completion(&nand_comp);
- dma_transfer_mem_to_mem(hndl, physPtr + offset,
- REG_NAND_DATA_PADDR, tmp_len);
- wait_for_completion(&nand_comp);
-
- offset += tmp_len;
- }
-
- dma_free_channel(hndl);
-}
-
-#endif
-
-static int nand_dev_ready(struct mtd_info *mtd)
-{
- return nand_bcm_umi_dev_ready();
-}
-
-/****************************************************************************
-*
-* bcm_umi_nand_inithw
-*
-* This routine does the necessary hardware (board-specific)
-* initializations. This includes setting up the timings, etc.
-*
-***************************************************************************/
-int bcm_umi_nand_inithw(void)
-{
- /* Configure nand timing parameters */
- REG_UMI_NAND_TCR &= ~0x7ffff;
- REG_UMI_NAND_TCR |= HW_CFG_NAND_TCR;
-
-#if !defined(CONFIG_MTD_NAND_BCM_UMI_HWCS)
- /* enable software control of CS */
- REG_UMI_NAND_TCR |= REG_UMI_NAND_TCR_CS_SWCTRL;
-#endif
-
- /* keep NAND chip select asserted */
- REG_UMI_NAND_RCSR |= REG_UMI_NAND_RCSR_CS_ASSERTED;
-
- REG_UMI_NAND_TCR &= ~REG_UMI_NAND_TCR_WORD16;
- /* enable writes to flash */
- REG_UMI_MMD_ICR |= REG_UMI_MMD_ICR_FLASH_WP;
-
- writel(NAND_CMD_RESET, bcm_umi_io_base + REG_NAND_CMD_OFFSET);
- nand_bcm_umi_wait_till_ready();
-
-#if NAND_ECC_BCH
- nand_bcm_umi_bch_config_ecc(NAND_ECC_NUM_BYTES);
-#endif
-
- return 0;
-}
-
-/* Used to turn latch the proper register for access. */
-static void bcm_umi_nand_hwcontrol(struct mtd_info *mtd, int cmd,
- unsigned int ctrl)
-{
- /* send command to hardware */
- struct nand_chip *chip = mtd->priv;
- if (ctrl & NAND_CTRL_CHANGE) {
- if (ctrl & NAND_CLE) {
- chip->IO_ADDR_W = bcm_umi_io_base + REG_NAND_CMD_OFFSET;
- goto CMD;
- }
- if (ctrl & NAND_ALE) {
- chip->IO_ADDR_W =
- bcm_umi_io_base + REG_NAND_ADDR_OFFSET;
- goto CMD;
- }
- chip->IO_ADDR_W = bcm_umi_io_base + REG_NAND_DATA8_OFFSET;
- }
-
-CMD:
- /* Send command to chip directly */
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, chip->IO_ADDR_W);
-}
-
-static void bcm_umi_nand_write_buf(struct mtd_info *mtd, const u_char * buf,
- int len)
-{
- if (USE_DIRECT_IO(len)) {
- /* Do it the old way if the buffer is small or too large.
- * Probably quicker than starting and checking dma. */
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i = 0; i < len; i++)
- writeb(buf[i], this->IO_ADDR_W);
- }
-#if USE_DMA
- else
- nand_dma_write(buf, len);
-#endif
-}
-
-static void bcm_umi_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len)
-{
- if (USE_DIRECT_IO(len)) {
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i = 0; i < len; i++)
- buf[i] = readb(this->IO_ADDR_R);
- }
-#if USE_DMA
- else
- nand_dma_read(buf, len);
-#endif
-}
-
-static int __devinit bcm_umi_nand_probe(struct platform_device *pdev)
-{
- struct nand_chip *this;
- struct resource *r;
- int err = 0;
-
- printk(gBanner);
-
- /* Allocate memory for MTD device structure and private data */
- board_mtd =
- kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip),
- GFP_KERNEL);
- if (!board_mtd) {
- printk(KERN_WARNING
- "Unable to allocate NAND MTD device structure.\n");
- return -ENOMEM;
- }
-
- r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- if (!r) {
- err = -ENXIO;
- goto out_free;
- }
-
- /* map physical address */
- bcm_umi_io_base = ioremap(r->start, resource_size(r));
-
- if (!bcm_umi_io_base) {
- printk(KERN_ERR "ioremap to access BCM UMI NAND chip failed\n");
- err = -EIO;
- goto out_free;
- }
-
- /* Get pointer to private data */
- this = (struct nand_chip *)(&board_mtd[1]);
-
- /* Initialize structures */
- memset((char *)board_mtd, 0, sizeof(struct mtd_info));
- memset((char *)this, 0, sizeof(struct nand_chip));
-
- /* Link the private data with the MTD structure */
- board_mtd->priv = this;
-
- /* Initialize the NAND hardware. */
- if (bcm_umi_nand_inithw() < 0) {
- printk(KERN_ERR "BCM UMI NAND chip could not be initialized\n");
- err = -EIO;
- goto out_unmap;
- }
-
- /* Set address of NAND IO lines */
- this->IO_ADDR_W = bcm_umi_io_base + REG_NAND_DATA8_OFFSET;
- this->IO_ADDR_R = bcm_umi_io_base + REG_NAND_DATA8_OFFSET;
-
- /* Set command delay time, see datasheet for correct value */
- this->chip_delay = 0;
- /* Assign the device ready function, if available */
- this->dev_ready = nand_dev_ready;
- this->options = 0;
-
- this->write_buf = bcm_umi_nand_write_buf;
- this->read_buf = bcm_umi_nand_read_buf;
-
- this->cmd_ctrl = bcm_umi_nand_hwcontrol;
- this->ecc.mode = NAND_ECC_HW;
- this->ecc.size = 512;
- this->ecc.bytes = NAND_ECC_NUM_BYTES;
-#if NAND_ECC_BCH
- this->ecc.read_page = bcm_umi_bch_read_page_hwecc;
- this->ecc.write_page = bcm_umi_bch_write_page_hwecc;
-#else
- this->ecc.correct = nand_correct_data512;
- this->ecc.calculate = bcm_umi_hamming_get_hw_ecc;
- this->ecc.hwctl = bcm_umi_hamming_enable_hwecc;
-#endif
-
-#if USE_DMA
- err = nand_dma_init();
- if (err != 0)
- goto out_unmap;
-#endif
-
- /* Figure out the size of the device that we have.
- * We need to do this to figure out which ECC
- * layout we'll be using.
- */
-
- err = nand_scan_ident(board_mtd, 1, NULL);
- if (err) {
- printk(KERN_ERR "nand_scan failed: %d\n", err);
- goto out_unmap;
- }
-
- /* Now that we know the nand size, we can setup the ECC layout */
-
- switch (board_mtd->writesize) { /* writesize is the pagesize */
- case 4096:
- this->ecc.layout = &nand_hw_eccoob_4096;
- break;
- case 2048:
- this->ecc.layout = &nand_hw_eccoob_2048;
- break;
- case 512:
- this->ecc.layout = &nand_hw_eccoob_512;
- break;
- default:
- {
- printk(KERN_ERR "NAND - Unrecognized pagesize: %d\n",
- board_mtd->writesize);
- err = -EINVAL;
- goto out_unmap;
- }
- }
-
-#if NAND_ECC_BCH
- if (board_mtd->writesize > 512) {
- if (this->bbt_options & NAND_BBT_USE_FLASH)
- largepage_bbt.options = NAND_BBT_SCAN2NDPAGE;
- this->badblock_pattern = &largepage_bbt;
- }
-
- this->ecc.strength = 8;
-
-#endif
-
- /* Now finish off the scan, now that ecc.layout has been initialized. */
-
- err = nand_scan_tail(board_mtd);
- if (err) {
- printk(KERN_ERR "nand_scan failed: %d\n", err);
- goto out_unmap;
- }
-
- /* Register the partitions */
- board_mtd->name = "bcm_umi-nand";
- mtd_device_parse_register(board_mtd, NULL, NULL, NULL, 0);
-
- /* Return happy */
- return 0;
-out_unmap:
- iounmap(bcm_umi_io_base);
-out_free:
- kfree(board_mtd);
- return err;
-}
-
-static int bcm_umi_nand_remove(struct platform_device *pdev)
-{
-#if USE_DMA
- nand_dma_term();
-#endif
-
- /* Release resources, unregister device */
- nand_release(board_mtd);
-
- /* unmap physical address */
- iounmap(bcm_umi_io_base);
-
- /* Free the MTD device structure */
- kfree(board_mtd);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int bcm_umi_nand_suspend(struct platform_device *pdev,
- pm_message_t state)
-{
- printk(KERN_ERR "MTD NAND suspend is being called\n");
- return 0;
-}
-
-static int bcm_umi_nand_resume(struct platform_device *pdev)
-{
- printk(KERN_ERR "MTD NAND resume is being called\n");
- return 0;
-}
-#else
-#define bcm_umi_nand_suspend NULL
-#define bcm_umi_nand_resume NULL
-#endif
-
-static struct platform_driver nand_driver = {
- .driver = {
- .name = "bcm-nand",
- .owner = THIS_MODULE,
- },
- .probe = bcm_umi_nand_probe,
- .remove = bcm_umi_nand_remove,
- .suspend = bcm_umi_nand_suspend,
- .resume = bcm_umi_nand_resume,
-};
-
-module_platform_driver(nand_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Broadcom");
-MODULE_DESCRIPTION("BCM UMI MTD NAND driver");
+++ /dev/null
-/*****************************************************************************
-* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-#include <mach/reg_umi.h>
-#include "nand_bcm_umi.h"
-#ifdef BOOT0_BUILD
-#include <uart.h>
-#endif
-
-/* ---- External Variable Declarations ----------------------------------- */
-/* ---- External Function Prototypes ------------------------------------- */
-/* ---- Public Variables ------------------------------------------------- */
-/* ---- Private Constants and Types -------------------------------------- */
-/* ---- Private Function Prototypes -------------------------------------- */
-/* ---- Private Variables ------------------------------------------------ */
-/* ---- Private Functions ------------------------------------------------ */
-
-#if NAND_ECC_BCH
-/****************************************************************************
-* nand_bch_ecc_flip_bit - Routine to flip an errored bit
-*
-* PURPOSE:
-* This is a helper routine that flips the bit (0 -> 1 or 1 -> 0) of the
-* errored bit specified
-*
-* PARAMETERS:
-* datap - Container that holds the 512 byte data
-* errorLocation - Location of the bit that needs to be flipped
-*
-* RETURNS:
-* None
-****************************************************************************/
-static void nand_bcm_umi_bch_ecc_flip_bit(uint8_t *datap, int errorLocation)
-{
- int locWithinAByte = (errorLocation & REG_UMI_BCH_ERR_LOC_BYTE) >> 0;
- int locWithinAWord = (errorLocation & REG_UMI_BCH_ERR_LOC_WORD) >> 3;
- int locWithinAPage = (errorLocation & REG_UMI_BCH_ERR_LOC_PAGE) >> 5;
-
- uint8_t errorByte = 0;
- uint8_t byteMask = 1 << locWithinAByte;
-
- /* BCH uses big endian, need to change the location
- * bits to little endian */
- locWithinAWord = 3 - locWithinAWord;
-
- errorByte = datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord];
-
-#ifdef BOOT0_BUILD
- puthexs("\nECC Correct Offset: ",
- locWithinAPage * sizeof(uint32_t) + locWithinAWord);
- puthexs(" errorByte:", errorByte);
- puthex8(" Bit: ", locWithinAByte);
-#endif
-
- if (errorByte & byteMask) {
- /* bit needs to be cleared */
- errorByte &= ~byteMask;
- } else {
- /* bit needs to be set */
- errorByte |= byteMask;
- }
-
- /* write back the value with the fixed bit */
- datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord] = errorByte;
-}
-
-/****************************************************************************
-* nand_correct_page_bch - Routine to correct bit errors when reading NAND
-*
-* PURPOSE:
-* This routine reads the BCH registers to determine if there are any bit
-* errors during the read of the last 512 bytes of data + ECC bytes. If
-* errors exists, the routine fixes it.
-*
-* PARAMETERS:
-* datap - Container that holds the 512 byte data
-*
-* RETURNS:
-* 0 or greater = Number of errors corrected
-* (No errors are found or errors have been fixed)
-* -1 = Error(s) cannot be fixed
-****************************************************************************/
-int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
- int numEccBytes)
-{
- int numErrors;
- int errorLocation;
- int idx;
- uint32_t regValue;
-
- /* wait for read ECC to be valid */
- regValue = nand_bcm_umi_bch_poll_read_ecc_calc();
-
- /*
- * read the control status register to determine if there
- * are error'ed bits
- * see if errors are correctible
- */
- if ((regValue & REG_UMI_BCH_CTRL_STATUS_UNCORR_ERR) > 0) {
- int i;
-
- for (i = 0; i < numEccBytes; i++) {
- if (readEccData[i] != 0xff) {
- /* errors cannot be fixed, return -1 */
- return -1;
- }
- }
- /* If ECC is unprogrammed then we can't correct,
- * assume everything OK */
- return 0;
- }
-
- if ((regValue & REG_UMI_BCH_CTRL_STATUS_CORR_ERR) == 0) {
- /* no errors */
- return 0;
- }
-
- /*
- * Fix errored bits by doing the following:
- * 1. Read the number of errors in the control and status register
- * 2. Read the error location registers that corresponds to the number
- * of errors reported
- * 3. Invert the bit in the data
- */
- numErrors = (regValue & REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR) >> 20;
-
- for (idx = 0; idx < numErrors; idx++) {
- errorLocation =
- REG_UMI_BCH_ERR_LOC_ADDR(idx) & REG_UMI_BCH_ERR_LOC_MASK;
-
- /* Flip bit */
- nand_bcm_umi_bch_ecc_flip_bit(datap, errorLocation);
- }
- /* Errors corrected */
- return numErrors;
-}
-#endif
+++ /dev/null
-/*****************************************************************************
-* Copyright 2003 - 2009 Broadcom Corporation. All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-#ifndef NAND_BCM_UMI_H
-#define NAND_BCM_UMI_H
-
-/* ---- Include Files ---------------------------------------------------- */
-#include <mach/reg_umi.h>
-#include <mach/reg_nand.h>
-#include <cfg_global.h>
-
-/* ---- Constants and Types ---------------------------------------------- */
-#if (CFG_GLOBAL_CHIP_FAMILY == CFG_GLOBAL_CHIP_FAMILY_BCMRING)
-#define NAND_ECC_BCH (CFG_GLOBAL_CHIP_REV > 0xA0)
-#else
-#define NAND_ECC_BCH 0
-#endif
-
-#define CFG_GLOBAL_NAND_ECC_BCH_NUM_BYTES 13
-
-#if NAND_ECC_BCH
-#ifdef BOOT0_BUILD
-#define NAND_ECC_NUM_BYTES 13
-#else
-#define NAND_ECC_NUM_BYTES CFG_GLOBAL_NAND_ECC_BCH_NUM_BYTES
-#endif
-#else
-#define NAND_ECC_NUM_BYTES 3
-#endif
-
-#define NAND_DATA_ACCESS_SIZE 512
-
-/* ---- Variable Externs ------------------------------------------ */
-/* ---- Function Prototypes --------------------------------------- */
-int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
- int numEccBytes);
-
-/* Check in device is ready */
-static inline int nand_bcm_umi_dev_ready(void)
-{
- return REG_UMI_NAND_RCSR & REG_UMI_NAND_RCSR_RDY;
-}
-
-/* Wait until device is ready */
-static inline void nand_bcm_umi_wait_till_ready(void)
-{
- while (nand_bcm_umi_dev_ready() == 0)
- ;
-}
-
-/* Enable Hamming ECC */
-static inline void nand_bcm_umi_hamming_enable_hwecc(void)
-{
- /* disable and reset ECC, 512 byte page */
- REG_UMI_NAND_ECC_CSR &= ~(REG_UMI_NAND_ECC_CSR_ECC_ENABLE |
- REG_UMI_NAND_ECC_CSR_256BYTE);
- /* enable ECC */
- REG_UMI_NAND_ECC_CSR |= REG_UMI_NAND_ECC_CSR_ECC_ENABLE;
-}
-
-#if NAND_ECC_BCH
-/* BCH ECC specifics */
-#define ECC_BITS_PER_CORRECTABLE_BIT 13
-
-/* Enable BCH Read ECC */
-static inline void nand_bcm_umi_bch_enable_read_hwecc(void)
-{
- /* disable and reset ECC */
- REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID;
- /* Turn on ECC */
- REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN;
-}
-
-/* Enable BCH Write ECC */
-static inline void nand_bcm_umi_bch_enable_write_hwecc(void)
-{
- /* disable and reset ECC */
- REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID;
- /* Turn on ECC */
- REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_WR_EN;
-}
-
-/* Config number of BCH ECC bytes */
-static inline void nand_bcm_umi_bch_config_ecc(uint8_t numEccBytes)
-{
- uint32_t nValue;
- uint32_t tValue;
- uint32_t kValue;
- uint32_t numBits = numEccBytes * 8;
-
- /* disable and reset ECC */
- REG_UMI_BCH_CTRL_STATUS =
- REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID |
- REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID;
-
- /* Every correctible bit requires 13 ECC bits */
- tValue = (uint32_t) (numBits / ECC_BITS_PER_CORRECTABLE_BIT);
-
- /* Total data in number of bits for generating and computing BCH ECC */
- nValue = (NAND_DATA_ACCESS_SIZE + numEccBytes) * 8;
-
- /* K parameter is used internally. K = N - (T * 13) */
- kValue = nValue - (tValue * ECC_BITS_PER_CORRECTABLE_BIT);
-
- /* Write the settings */
- REG_UMI_BCH_N = nValue;
- REG_UMI_BCH_T = tValue;
- REG_UMI_BCH_K = kValue;
-}
-
-/* Pause during ECC read calculation to skip bytes in OOB */
-static inline void nand_bcm_umi_bch_pause_read_ecc_calc(void)
-{
- REG_UMI_BCH_CTRL_STATUS =
- REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN |
- REG_UMI_BCH_CTRL_STATUS_PAUSE_ECC_DEC;
-}
-
-/* Resume during ECC read calculation after skipping bytes in OOB */
-static inline void nand_bcm_umi_bch_resume_read_ecc_calc(void)
-{
- REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN;
-}
-
-/* Poll read ECC calc to check when hardware completes */
-static inline uint32_t nand_bcm_umi_bch_poll_read_ecc_calc(void)
-{
- uint32_t regVal;
-
- do {
- /* wait for ECC to be valid */
- regVal = REG_UMI_BCH_CTRL_STATUS;
- } while ((regVal & REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID) == 0);
-
- return regVal;
-}
-
-/* Poll write ECC calc to check when hardware completes */
-static inline void nand_bcm_umi_bch_poll_write_ecc_calc(void)
-{
- /* wait for ECC to be valid */
- while ((REG_UMI_BCH_CTRL_STATUS & REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID)
- == 0)
- ;
-}
-
-/* Read the OOB and ECC, for kernel write OOB to a buffer */
-#if defined(__KERNEL__) && !defined(STANDALONE)
-static inline void nand_bcm_umi_bch_read_oobEcc(uint32_t pageSize,
- uint8_t *eccCalc, int numEccBytes, uint8_t *oobp)
-#else
-static inline void nand_bcm_umi_bch_read_oobEcc(uint32_t pageSize,
- uint8_t *eccCalc, int numEccBytes)
-#endif
-{
- int eccPos = 0;
- int numToRead = 16; /* There are 16 bytes per sector in the OOB */
-
- /* ECC is already paused when this function is called */
- if (pageSize != NAND_DATA_ACCESS_SIZE) {
- /* skip BI */
-#if defined(__KERNEL__) && !defined(STANDALONE)
- *oobp++ = REG_NAND_DATA8;
-#else
- REG_NAND_DATA8;
-#endif
- numToRead--;
- }
-
- while (numToRead > numEccBytes) {
- /* skip free oob region */
-#if defined(__KERNEL__) && !defined(STANDALONE)
- *oobp++ = REG_NAND_DATA8;
-#else
- REG_NAND_DATA8;
-#endif
- numToRead--;
- }
-
- if (pageSize == NAND_DATA_ACCESS_SIZE) {
- /* read ECC bytes before BI */
- nand_bcm_umi_bch_resume_read_ecc_calc();
-
- while (numToRead > 11) {
-#if defined(__KERNEL__) && !defined(STANDALONE)
- *oobp = REG_NAND_DATA8;
- eccCalc[eccPos++] = *oobp;
- oobp++;
-#else
- eccCalc[eccPos++] = REG_NAND_DATA8;
-#endif
- numToRead--;
- }
-
- nand_bcm_umi_bch_pause_read_ecc_calc();
-
- if (numToRead == 11) {
- /* read BI */
-#if defined(__KERNEL__) && !defined(STANDALONE)
- *oobp++ = REG_NAND_DATA8;
-#else
- REG_NAND_DATA8;
-#endif
- numToRead--;
- }
-
- }
- /* read ECC bytes */
- nand_bcm_umi_bch_resume_read_ecc_calc();
- while (numToRead) {
-#if defined(__KERNEL__) && !defined(STANDALONE)
- *oobp = REG_NAND_DATA8;
- eccCalc[eccPos++] = *oobp;
- oobp++;
-#else
- eccCalc[eccPos++] = REG_NAND_DATA8;
-#endif
- numToRead--;
- }
-}
-
-/* Helper function to write ECC */
-static inline void NAND_BCM_UMI_ECC_WRITE(int numEccBytes, int eccBytePos,
- uint8_t *oobp, uint8_t eccVal)
-{
- if (eccBytePos <= numEccBytes)
- *oobp = eccVal;
-}
-
-/* Write OOB with ECC */
-static inline void nand_bcm_umi_bch_write_oobEcc(uint32_t pageSize,
- uint8_t *oobp, int numEccBytes)
-{
- uint32_t eccVal = 0xffffffff;
-
- /* wait for write ECC to be valid */
- nand_bcm_umi_bch_poll_write_ecc_calc();
-
- /*
- ** Get the hardware ecc from the 32-bit result registers.
- ** Read after 512 byte accesses. Format B3B2B1B0
- ** where B3 = ecc3, etc.
- */
-
- if (pageSize == NAND_DATA_ACCESS_SIZE) {
- /* Now fill in the ECC bytes */
- if (numEccBytes >= 13)
- eccVal = REG_UMI_BCH_WR_ECC_3;
-
- /* Usually we skip CM in oob[0,1] */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 15, &oobp[0],
- (eccVal >> 16) & 0xff);
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 14, &oobp[1],
- (eccVal >> 8) & 0xff);
-
- /* Write ECC in oob[2,3,4] */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 13, &oobp[2],
- eccVal & 0xff); /* ECC 12 */
-
- if (numEccBytes >= 9)
- eccVal = REG_UMI_BCH_WR_ECC_2;
-
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 12, &oobp[3],
- (eccVal >> 24) & 0xff); /* ECC11 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 11, &oobp[4],
- (eccVal >> 16) & 0xff); /* ECC10 */
-
- /* Always Skip BI in oob[5] */
- } else {
- /* Always Skip BI in oob[0] */
-
- /* Now fill in the ECC bytes */
- if (numEccBytes >= 13)
- eccVal = REG_UMI_BCH_WR_ECC_3;
-
- /* Usually skip CM in oob[1,2] */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 15, &oobp[1],
- (eccVal >> 16) & 0xff);
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 14, &oobp[2],
- (eccVal >> 8) & 0xff);
-
- /* Write ECC in oob[3-15] */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 13, &oobp[3],
- eccVal & 0xff); /* ECC12 */
-
- if (numEccBytes >= 9)
- eccVal = REG_UMI_BCH_WR_ECC_2;
-
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 12, &oobp[4],
- (eccVal >> 24) & 0xff); /* ECC11 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 11, &oobp[5],
- (eccVal >> 16) & 0xff); /* ECC10 */
- }
-
- /* Fill in the remainder of ECC locations */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 10, &oobp[6],
- (eccVal >> 8) & 0xff); /* ECC9 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 9, &oobp[7],
- eccVal & 0xff); /* ECC8 */
-
- if (numEccBytes >= 5)
- eccVal = REG_UMI_BCH_WR_ECC_1;
-
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 8, &oobp[8],
- (eccVal >> 24) & 0xff); /* ECC7 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 7, &oobp[9],
- (eccVal >> 16) & 0xff); /* ECC6 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 6, &oobp[10],
- (eccVal >> 8) & 0xff); /* ECC5 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 5, &oobp[11],
- eccVal & 0xff); /* ECC4 */
-
- if (numEccBytes >= 1)
- eccVal = REG_UMI_BCH_WR_ECC_0;
-
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 4, &oobp[12],
- (eccVal >> 24) & 0xff); /* ECC3 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 3, &oobp[13],
- (eccVal >> 16) & 0xff); /* ECC2 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 2, &oobp[14],
- (eccVal >> 8) & 0xff); /* ECC1 */
- NAND_BCM_UMI_ECC_WRITE(numEccBytes, 1, &oobp[15],
- eccVal & 0xff); /* ECC0 */
-}
-#endif
-
-#endif /* NAND_BCM_UMI_H */
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