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authorChristian Daudt <csd@broadcom.com>2012-09-21 14:40:25 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2012-09-29 15:54:09 +0100
commitb2bc415b6b7bb240b967f6dd95007a2cf7b4c424 (patch)
tree1c8401a0e04e1df05beefc57d47bd313900135b0 /drivers/mtd/nand/bcm_umi_nand.c
parent5ca7f41528922c90da3ae3b917dc904047513be2 (diff)
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This driver is being removed as part of the cleanup of the bcmring SoC from mainline as it is no longer maintained.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/nand/bcm_umi_nand.c')
-rw-r--r--drivers/mtd/nand/bcm_umi_nand.c533
1 files changed, 0 insertions, 533 deletions
diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c
deleted file mode 100644
index 3fcbcbc7b08..00000000000
--- 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");