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SoC from mainline as it is no longer maintained.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>

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 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");