diff options
author | Christian Daudt <csd@broadcom.com> | 2012-09-21 14:40:25 -0700 |
---|---|---|
committer | David Woodhouse <David.Woodhouse@intel.com> | 2012-09-29 15:54:09 +0100 |
commit | b2bc415b6b7bb240b967f6dd95007a2cf7b4c424 (patch) | |
tree | 1c8401a0e04e1df05beefc57d47bd313900135b0 /drivers/mtd | |
parent | 5ca7f41528922c90da3ae3b917dc904047513be2 (diff) | |
download | lwn-b2bc415b6b7bb240b967f6dd95007a2cf7b4c424.tar.gz lwn-b2bc415b6b7bb240b967f6dd95007a2cf7b4c424.zip |
mtd: remove bcmring NAND driver
This driver is being removed as part of the cleanup of the bcmring
SoC from mainline as it is no longer maintained.
Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Jiandong Zheng <jdzheng@broadcom.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r-- | drivers/mtd/nand/Kconfig | 16 | ||||
-rw-r--r-- | drivers/mtd/nand/Makefile | 1 | ||||
-rw-r--r-- | drivers/mtd/nand/bcm_umi_bch.c | 210 | ||||
-rw-r--r-- | drivers/mtd/nand/bcm_umi_nand.c | 533 | ||||
-rw-r--r-- | drivers/mtd/nand/nand_bcm_umi.c | 149 | ||||
-rw-r--r-- | drivers/mtd/nand/nand_bcm_umi.h | 337 |
6 files changed, 0 insertions, 1246 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 6010b500f93d..baa343634819 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -258,22 +258,6 @@ config MTD_NAND_S3C2410_CLKSTOP 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 diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index c4b0ab316bab..2cbd0916b733 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -48,7 +48,6 @@ obj-$(CONFIG_MTD_NAND_SOCRATES) += socrates_nand.o obj-$(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 diff --git a/drivers/mtd/nand/bcm_umi_bch.c b/drivers/mtd/nand/bcm_umi_bch.c deleted file mode 100644 index ce39c8705d62..000000000000 --- a/drivers/mtd/nand/bcm_umi_bch.c +++ /dev/null @@ -1,210 +0,0 @@ -/***************************************************************************** -* 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; -} diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c deleted file mode 100644 index 3fcbcbc7b082..000000000000 --- a/drivers/mtd/nand/bcm_umi_nand.c +++ /dev/null @@ -1,533 +0,0 @@ -/***************************************************************************** -* 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"); diff --git a/drivers/mtd/nand/nand_bcm_umi.c b/drivers/mtd/nand/nand_bcm_umi.c deleted file mode 100644 index 46a6bc9c4b74..000000000000 --- a/drivers/mtd/nand/nand_bcm_umi.c +++ /dev/null @@ -1,149 +0,0 @@ -/***************************************************************************** -* 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 diff --git a/drivers/mtd/nand/nand_bcm_umi.h b/drivers/mtd/nand/nand_bcm_umi.h deleted file mode 100644 index 198b304d6f72..000000000000 --- a/drivers/mtd/nand/nand_bcm_umi.h +++ /dev/null @@ -1,337 +0,0 @@ -/***************************************************************************** -* 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 */ |