2 files changed, 198 insertions, 285 deletions

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index a494cce704b9..8229802b4346 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -451,6 +451,7 @@ config MTD_NAND_ORION
 config MTD_NAND_FSL_ELBC
         tristate "NAND support for Freescale eLBC controllers"
         depends on PPC_OF
+        select FSL_LBC
         help
           Various Freescale chips, including the 8313, include a NAND Flash
           Controller Module with built-in hardware ECC capabilities.
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index 80de0bff6c3a..cd8de29e38cc 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -1,9 +1,11 @@
 /* Freescale Enhanced Local Bus Controller NAND driver
  *
- * Copyright (c) 2006-2007 Freescale Semiconductor
+ * Copyright © 2006-2007, 2010 Freescale Semiconductor
  *
  * Authors: Nick Spence <nick.spence@freescale.com>,
  *          Scott Wood <scottwood@freescale.com>
+ *          Jack Lan <jack.lan@freescale.com>
+ *          Roy Zang <tie-fei.zang@freescale.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,6 +29,7 @@
 #include <linux/string.h>
 #include <linux/ioport.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 
@@ -42,14 +45,12 @@
 #define ERR_BYTE 0xFF /* Value returned for read bytes when read failed */
 #define FCM_TIMEOUT_MSECS 500 /* Maximum number of mSecs to wait for FCM */
 
-struct fsl_elbc_ctrl;
-
 /* mtd information per set */
 
 struct fsl_elbc_mtd {
         struct mtd_info mtd;
         struct nand_chip chip;
-        struct fsl_elbc_ctrl *ctrl;
+        struct fsl_lbc_ctrl *ctrl;
 
         struct device *dev;
         int bank;               /* Chip select bank number           */
@@ -58,18 +59,12 @@ struct fsl_elbc_mtd {
         unsigned int fmr;       /* FCM Flash Mode Register value     */
 };
 
-/* overview of the fsl elbc controller */
+/* Freescale eLBC FCM controller infomation */
 
-struct fsl_elbc_ctrl {
+struct fsl_elbc_fcm_ctrl {
         struct nand_hw_control controller;
         struct fsl_elbc_mtd *chips[MAX_BANKS];
 
-        /* device info */
-        struct device *dev;
-        struct fsl_lbc_regs __iomem *regs;
-        int irq;
-        wait_queue_head_t irq_wait;
-        unsigned int irq_status; /* status read from LTESR by irq handler */
         u8 __iomem *addr;        /* Address of assigned FCM buffer        */
         unsigned int page;       /* Last page written to / read from      */
         unsigned int read_bytes; /* Number of bytes read during command   */
@@ -79,6 +74,7 @@ struct fsl_elbc_ctrl {
         unsigned int mdr;        /* UPM/FCM Data Register value           */
         unsigned int use_mdr;    /* Non zero if the MDR is to be set      */
         unsigned int oob;        /* Non zero if operating on OOB data     */
+        unsigned int counter;    /* counter for the initializations       */
         char *oob_poi;           /* Place to write ECC after read back    */
 };
 
@@ -164,11 +160,12 @@ static void set_addr(struct mtd_info *mtd, int column, int page_addr, int oob)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_lbc_ctrl *ctrl = priv->ctrl;
         struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = ctrl->nand;
         int buf_num;
 
-        ctrl->page = page_addr;
+        elbc_fcm_ctrl->page = page_addr;
 
         out_be32(&lbc->fbar,
                  page_addr >> (chip->phys_erase_shift - chip->page_shift));
@@ -185,16 +182,18 @@ static void set_addr(struct mtd_info *mtd, int column, int page_addr, int oob)
                 buf_num = page_addr & 7;
         }
 
-        ctrl->addr = priv->vbase + buf_num * 1024;
-        ctrl->index = column;
+        elbc_fcm_ctrl->addr = priv->vbase + buf_num * 1024;
+        elbc_fcm_ctrl->index = column;
 
         /* for OOB data point to the second half of the buffer */
         if (oob)
-                ctrl->index += priv->page_size ? 2048 : 512;
+                elbc_fcm_ctrl->index += priv->page_size ? 2048 : 512;
 
-        dev_vdbg(ctrl->dev, "set_addr: bank=%d, ctrl->addr=0x%p (0x%p), "
+        dev_vdbg(priv->dev, "set_addr: bank=%d, "
+                            "elbc_fcm_ctrl->addr=0x%p (0x%p), "
                             "index %x, pes %d ps %d\n",
-                 buf_num, ctrl->addr, priv->vbase, ctrl->index,
+                 buf_num, elbc_fcm_ctrl->addr, priv->vbase,
+                 elbc_fcm_ctrl->index,
                  chip->phys_erase_shift, chip->page_shift);
 }
 
@@ -205,18 +204,19 @@ static int fsl_elbc_run_command(struct mtd_info *mtd)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_lbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = ctrl->nand;
         struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
 
         /* Setup the FMR[OP] to execute without write protection */
         out_be32(&lbc->fmr, priv->fmr | 3);
-        if (ctrl->use_mdr)
-                out_be32(&lbc->mdr, ctrl->mdr);
+        if (elbc_fcm_ctrl->use_mdr)
+                out_be32(&lbc->mdr, elbc_fcm_ctrl->mdr);
 
-        dev_vdbg(ctrl->dev,
+        dev_vdbg(priv->dev,
                  "fsl_elbc_run_command: fmr=%08x fir=%08x fcr=%08x\n",
                  in_be32(&lbc->fmr), in_be32(&lbc->fir), in_be32(&lbc->fcr));
-        dev_vdbg(ctrl->dev,
+        dev_vdbg(priv->dev,
                  "fsl_elbc_run_command: fbar=%08x fpar=%08x "
                  "fbcr=%08x bank=%d\n",
                  in_be32(&lbc->fbar), in_be32(&lbc->fpar),
@@ -229,19 +229,18 @@ static int fsl_elbc_run_command(struct mtd_info *mtd)
         /* wait for FCM complete flag or timeout */
         wait_event_timeout(ctrl->irq_wait, ctrl->irq_status,
                            FCM_TIMEOUT_MSECS * HZ/1000);
-        ctrl->status = ctrl->irq_status;
-
+        elbc_fcm_ctrl->status = ctrl->irq_status;
         /* store mdr value in case it was needed */
-        if (ctrl->use_mdr)
-                ctrl->mdr = in_be32(&lbc->mdr);
+        if (elbc_fcm_ctrl->use_mdr)
+                elbc_fcm_ctrl->mdr = in_be32(&lbc->mdr);
 
-        ctrl->use_mdr = 0;
+        elbc_fcm_ctrl->use_mdr = 0;
 
-        if (ctrl->status != LTESR_CC) {
-                dev_info(ctrl->dev,
+        if (elbc_fcm_ctrl->status != LTESR_CC) {
+                dev_info(priv->dev,
                          "command failed: fir %x fcr %x status %x mdr %x\n",
                          in_be32(&lbc->fir), in_be32(&lbc->fcr),
-                         ctrl->status, ctrl->mdr);
+                         elbc_fcm_ctrl->status, elbc_fcm_ctrl->mdr);
                 return -EIO;
         }
 
@@ -251,7 +250,7 @@ static int fsl_elbc_run_command(struct mtd_info *mtd)
 static void fsl_elbc_do_read(struct nand_chip *chip, int oob)
 {
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_lbc_ctrl *ctrl = priv->ctrl;
         struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
 
         if (priv->page_size) {
@@ -284,15 +283,16 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_lbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = ctrl->nand;
         struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
 
-        ctrl->use_mdr = 0;
+        elbc_fcm_ctrl->use_mdr = 0;
 
         /* clear the read buffer */
-        ctrl->read_bytes = 0;
+        elbc_fcm_ctrl->read_bytes = 0;
         if (command != NAND_CMD_PAGEPROG)
-                ctrl->index = 0;
+                elbc_fcm_ctrl->index = 0;
 
         switch (command) {
         /* READ0 and READ1 read the entire buffer to use hardware ECC. */
@@ -301,7 +301,7 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 
         /* fall-through */
         case NAND_CMD_READ0:
-                dev_dbg(ctrl->dev,
+                dev_dbg(priv->dev,
                         "fsl_elbc_cmdfunc: NAND_CMD_READ0, page_addr:"
                         " 0x%x, column: 0x%x.\n", page_addr, column);
 
@@ -309,8 +309,8 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                 out_be32(&lbc->fbcr, 0); /* read entire page to enable ECC */
                 set_addr(mtd, 0, page_addr, 0);
 
-                ctrl->read_bytes = mtd->writesize + mtd->oobsize;
-                ctrl->index += column;
+                elbc_fcm_ctrl->read_bytes = mtd->writesize + mtd->oobsize;
+                elbc_fcm_ctrl->index += column;
 
                 fsl_elbc_do_read(chip, 0);
                 fsl_elbc_run_command(mtd);
@@ -318,14 +318,14 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 
         /* READOOB reads only the OOB because no ECC is performed. */
         case NAND_CMD_READOOB:
-                dev_vdbg(ctrl->dev,
+                dev_vdbg(priv->dev,
                          "fsl_elbc_cmdfunc: NAND_CMD_READOOB, page_addr:"
                          " 0x%x, column: 0x%x.\n", page_addr, column);
 
                 out_be32(&lbc->fbcr, mtd->oobsize - column);
                 set_addr(mtd, column, page_addr, 1);
 
-                ctrl->read_bytes = mtd->writesize + mtd->oobsize;
+                elbc_fcm_ctrl->read_bytes = mtd->writesize + mtd->oobsize;
 
                 fsl_elbc_do_read(chip, 1);
                 fsl_elbc_run_command(mtd);
@@ -333,7 +333,7 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 
         /* READID must read all 5 possible bytes while CEB is active */
         case NAND_CMD_READID:
-                dev_vdbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_READID.\n");
+                dev_vdbg(priv->dev, "fsl_elbc_cmdfunc: NAND_CMD_READID.\n");
 
                 out_be32(&lbc->fir, (FIR_OP_CM0 << FIR_OP0_SHIFT) |
                                     (FIR_OP_UA  << FIR_OP1_SHIFT) |
@@ -341,9 +341,9 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                 out_be32(&lbc->fcr, NAND_CMD_READID << FCR_CMD0_SHIFT);
                 /* 5 bytes for manuf, device and exts */
                 out_be32(&lbc->fbcr, 5);
-                ctrl->read_bytes = 5;
-                ctrl->use_mdr = 1;
-                ctrl->mdr = 0;
+                elbc_fcm_ctrl->read_bytes = 5;
+                elbc_fcm_ctrl->use_mdr = 1;
+                elbc_fcm_ctrl->mdr = 0;
 
                 set_addr(mtd, 0, 0, 0);
                 fsl_elbc_run_command(mtd);
@@ -351,7 +351,7 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 
         /* ERASE1 stores the block and page address */
         case NAND_CMD_ERASE1:
-                dev_vdbg(ctrl->dev,
+                dev_vdbg(priv->dev,
                          "fsl_elbc_cmdfunc: NAND_CMD_ERASE1, "
                          "page_addr: 0x%x.\n", page_addr);
                 set_addr(mtd, 0, page_addr, 0);
@@ -359,7 +359,7 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 
         /* ERASE2 uses the block and page address from ERASE1 */
         case NAND_CMD_ERASE2:
-                dev_vdbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_ERASE2.\n");
+                dev_vdbg(priv->dev, "fsl_elbc_cmdfunc: NAND_CMD_ERASE2.\n");
 
                 out_be32(&lbc->fir,
                          (FIR_OP_CM0 << FIR_OP0_SHIFT) |
@@ -374,8 +374,8 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                          (NAND_CMD_ERASE2 << FCR_CMD2_SHIFT));
 
                 out_be32(&lbc->fbcr, 0);
-                ctrl->read_bytes = 0;
-                ctrl->use_mdr = 1;
+                elbc_fcm_ctrl->read_bytes = 0;
+                elbc_fcm_ctrl->use_mdr = 1;
 
                 fsl_elbc_run_command(mtd);
                 return;
@@ -383,14 +383,12 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
         /* SEQIN sets up the addr buffer and all registers except the length */
         case NAND_CMD_SEQIN: {
                 __be32 fcr;
-                dev_vdbg(ctrl->dev,
-                         "fsl_elbc_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG, "
+                dev_vdbg(priv->dev,
+                         "fsl_elbc_cmdfunc: NAND_CMD_SEQIN/PAGE_PROG, "
                          "page_addr: 0x%x, column: 0x%x.\n",
                          page_addr, column);
 
-                ctrl->column = column;
-                ctrl->oob = 0;
-                ctrl->use_mdr = 1;
+                elbc_fcm_ctrl->use_mdr = 1;
 
                 fcr = (NAND_CMD_STATUS   << FCR_CMD1_SHIFT) |
                       (NAND_CMD_SEQIN    << FCR_CMD2_SHIFT) |
@@ -420,7 +418,7 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                                 /* OOB area --> READOOB */
                                 column -= mtd->writesize;
                                 fcr |= NAND_CMD_READOOB << FCR_CMD0_SHIFT;
-                                ctrl->oob = 1;
+                                elbc_fcm_ctrl->oob = 1;
                         } else {
                                 WARN_ON(column != 0);
                                 /* First 256 bytes --> READ0 */
@@ -429,24 +427,24 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                 }
 
                 out_be32(&lbc->fcr, fcr);
-                set_addr(mtd, column, page_addr, ctrl->oob);
+                set_addr(mtd, column, page_addr, elbc_fcm_ctrl->oob);
                 return;
         }
 
         /* PAGEPROG reuses all of the setup from SEQIN and adds the length */
         case NAND_CMD_PAGEPROG: {
                 int full_page;
-                dev_vdbg(ctrl->dev,
+                dev_vdbg(priv->dev,
                          "fsl_elbc_cmdfunc: NAND_CMD_PAGEPROG "
-                         "writing %d bytes.\n", ctrl->index);
+                         "writing %d bytes.\n", elbc_fcm_ctrl->index);
 
                 /* if the write did not start at 0 or is not a full page
                  * then set the exact length, otherwise use a full page
                  * write so the HW generates the ECC.
                  */
-                if (ctrl->oob || ctrl->column != 0 ||
-                    ctrl->index != mtd->writesize + mtd->oobsize) {
-                        out_be32(&lbc->fbcr, ctrl->index);
+                if (elbc_fcm_ctrl->oob || elbc_fcm_ctrl->column != 0 ||
+                    elbc_fcm_ctrl->index != mtd->writesize + mtd->oobsize) {
+                        out_be32(&lbc->fbcr, elbc_fcm_ctrl->index);
                         full_page = 0;
                 } else {
                         out_be32(&lbc->fbcr, 0);
@@ -458,21 +456,21 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                 /* Read back the page in order to fill in the ECC for the
                  * caller.  Is this really needed?
                  */
-                if (full_page && ctrl->oob_poi) {
+                if (full_page && elbc_fcm_ctrl->oob_poi) {
                         out_be32(&lbc->fbcr, 3);
                         set_addr(mtd, 6, page_addr, 1);
 
-                        ctrl->read_bytes = mtd->writesize + 9;
+                        elbc_fcm_ctrl->read_bytes = mtd->writesize + 9;
 
                         fsl_elbc_do_read(chip, 1);
                         fsl_elbc_run_command(mtd);
 
-                        memcpy_fromio(ctrl->oob_poi + 6,
-                                      &ctrl->addr[ctrl->index], 3);
-                        ctrl->index += 3;
+                        memcpy_fromio(elbc_fcm_ctrl->oob_poi + 6,
+                                &elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index], 3);
+                        elbc_fcm_ctrl->index += 3;
                 }
 
-                ctrl->oob_poi = NULL;
+                elbc_fcm_ctrl->oob_poi = NULL;
                 return;
         }
 
@@ -485,26 +483,26 @@ static void fsl_elbc_cmdfunc(struct mtd_info *mtd, unsigned int command,
                 out_be32(&lbc->fcr, NAND_CMD_STATUS << FCR_CMD0_SHIFT);
                 out_be32(&lbc->fbcr, 1);
                 set_addr(mtd, 0, 0, 0);
-                ctrl->read_bytes = 1;
+                elbc_fcm_ctrl->read_bytes = 1;
 
                 fsl_elbc_run_command(mtd);
 
                 /* The chip always seems to report that it is
                  * write-protected, even when it is not.
                  */
-                setbits8(ctrl->addr, NAND_STATUS_WP);
+                setbits8(elbc_fcm_ctrl->addr, NAND_STATUS_WP);
                 return;
 
         /* RESET without waiting for the ready line */
         case NAND_CMD_RESET:
-                dev_dbg(ctrl->dev, "fsl_elbc_cmdfunc: NAND_CMD_RESET.\n");
+                dev_dbg(priv->dev, "fsl_elbc_cmdfunc: NAND_CMD_RESET.\n");
                 out_be32(&lbc->fir, FIR_OP_CM0 << FIR_OP0_SHIFT);
                 out_be32(&lbc->fcr, NAND_CMD_RESET << FCR_CMD0_SHIFT);
                 fsl_elbc_run_command(mtd);
                 return;
 
         default:
-                dev_err(ctrl->dev,
+                dev_err(priv->dev,
                         "fsl_elbc_cmdfunc: error, unsupported command 0x%x.\n",
                         command);
         }
@@ -524,24 +522,24 @@ static void fsl_elbc_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
         unsigned int bufsize = mtd->writesize + mtd->oobsize;
 
         if (len <= 0) {
-                dev_err(ctrl->dev, "write_buf of %d bytes", len);
-                ctrl->status = 0;
+                dev_err(priv->dev, "write_buf of %d bytes", len);
+                elbc_fcm_ctrl->status = 0;
                 return;
         }
 
-        if ((unsigned int)len > bufsize - ctrl->index) {
-                dev_err(ctrl->dev,
+        if ((unsigned int)len > bufsize - elbc_fcm_ctrl->index) {
+                dev_err(priv->dev,
                         "write_buf beyond end of buffer "
                         "(%d requested, %u available)\n",
-                        len, bufsize - ctrl->index);
-                len = bufsize - ctrl->index;
+                        len, bufsize - elbc_fcm_ctrl->index);
+                len = bufsize - elbc_fcm_ctrl->index;
         }
 
-        memcpy_toio(&ctrl->addr[ctrl->index], buf, len);
+        memcpy_toio(&elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index], buf, len);
         /*
          * This is workaround for the weird elbc hangs during nand write,
          * Scott Wood says: "...perhaps difference in how long it takes a
@@ -549,9 +547,9 @@ static void fsl_elbc_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
          * is causing problems, and sync isn't helping for some reason."
          * Reading back the last byte helps though.
          */
-        in_8(&ctrl->addr[ctrl->index] + len - 1);
+        in_8(&elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index] + len - 1);
 
-        ctrl->index += len;
+        elbc_fcm_ctrl->index += len;
 }
 
 /*
@@ -562,13 +560,13 @@ static u8 fsl_elbc_read_byte(struct mtd_info *mtd)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
 
         /* If there are still bytes in the FCM, then use the next byte. */
-        if (ctrl->index < ctrl->read_bytes)
-                return in_8(&ctrl->addr[ctrl->index++]);
+        if (elbc_fcm_ctrl->index < elbc_fcm_ctrl->read_bytes)
+                return in_8(&elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index++]);
 
-        dev_err(ctrl->dev, "read_byte beyond end of buffer\n");
+        dev_err(priv->dev, "read_byte beyond end of buffer\n");
         return ERR_BYTE;
 }
 
@@ -579,18 +577,19 @@ static void fsl_elbc_read_buf(struct mtd_info *mtd, u8 *buf, int len)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
         int avail;
 
         if (len < 0)
                 return;
 
-        avail = min((unsigned int)len, ctrl->read_bytes - ctrl->index);
-        memcpy_fromio(buf, &ctrl->addr[ctrl->index], avail);
-        ctrl->index += avail;
+        avail = min((unsigned int)len,
+                        elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index);
+        memcpy_fromio(buf, &elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index], avail);
+        elbc_fcm_ctrl->index += avail;
 
         if (len > avail)
-                dev_err(ctrl->dev,
+                dev_err(priv->dev,
                         "read_buf beyond end of buffer "
                         "(%d requested, %d available)\n",
                         len, avail);
@@ -603,30 +602,32 @@ static int fsl_elbc_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
         int i;
 
         if (len < 0) {
-                dev_err(ctrl->dev, "write_buf of %d bytes", len);
+                dev_err(priv->dev, "write_buf of %d bytes", len);
                 return -EINVAL;
         }
 
-        if ((unsigned int)len > ctrl->read_bytes - ctrl->index) {
-                dev_err(ctrl->dev,
-                        "verify_buf beyond end of buffer "
-                        "(%d requested, %u available)\n",
-                        len, ctrl->read_bytes - ctrl->index);
+        if ((unsigned int)len >
+                        elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index) {
+                dev_err(priv->dev,
+                        "verify_buf beyond end of buffer "
+                        "(%d requested, %u available)\n",
+                        len, elbc_fcm_ctrl->read_bytes - elbc_fcm_ctrl->index);
 
-                ctrl->index = ctrl->read_bytes;
+                elbc_fcm_ctrl->index = elbc_fcm_ctrl->read_bytes;
                 return -EINVAL;
         }
 
         for (i = 0; i < len; i++)
-                if (in_8(&ctrl->addr[ctrl->index + i]) != buf[i])
+                if (in_8(&elbc_fcm_ctrl->addr[elbc_fcm_ctrl->index + i])
+                                != buf[i])
                         break;
 
-        ctrl->index += len;
-        return i == len && ctrl->status == LTESR_CC ? 0 : -EIO;
+        elbc_fcm_ctrl->index += len;
+        return i == len && elbc_fcm_ctrl->status == LTESR_CC ? 0 : -EIO;
 }
 
 /* This function is called after Program and Erase Operations to
@@ -635,22 +636,22 @@ static int fsl_elbc_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
 static int fsl_elbc_wait(struct mtd_info *mtd, struct nand_chip *chip)
 {
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
 
-        if (ctrl->status != LTESR_CC)
+        if (elbc_fcm_ctrl->status != LTESR_CC)
                 return NAND_STATUS_FAIL;
 
         /* The chip always seems to report that it is
          * write-protected, even when it is not.
          */
-        return (ctrl->mdr & 0xff) | NAND_STATUS_WP;
+        return (elbc_fcm_ctrl->mdr & 0xff) | NAND_STATUS_WP;
 }
 
 static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
 {
         struct nand_chip *chip = mtd->priv;
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_lbc_ctrl *ctrl = priv->ctrl;
         struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
         unsigned int al;
 
@@ -665,41 +666,41 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
         priv->fmr |= (12 << FMR_CWTO_SHIFT) |  /* Timeout > 12 ms */
                      (al << FMR_AL_SHIFT);
 
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->numchips = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->numchips = %d\n",
                 chip->numchips);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chipsize = %lld\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->chipsize = %lld\n",
                 chip->chipsize);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->pagemask = %8x\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->pagemask = %8x\n",
                 chip->pagemask);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chip_delay = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->chip_delay = %d\n",
                 chip->chip_delay);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->badblockpos = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->badblockpos = %d\n",
                 chip->badblockpos);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->chip_shift = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->chip_shift = %d\n",
                 chip->chip_shift);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->page_shift = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->page_shift = %d\n",
                 chip->page_shift);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->phys_erase_shift = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->phys_erase_shift = %d\n",
                 chip->phys_erase_shift);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecclayout = %p\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->ecclayout = %p\n",
                 chip->ecclayout);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.mode = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.mode = %d\n",
                 chip->ecc.mode);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.steps = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.steps = %d\n",
                 chip->ecc.steps);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.bytes = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.bytes = %d\n",
                 chip->ecc.bytes);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.total = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.total = %d\n",
                 chip->ecc.total);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: nand->ecc.layout = %p\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: nand->ecc.layout = %p\n",
                 chip->ecc.layout);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->flags = %08x\n", mtd->flags);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->size = %lld\n", mtd->size);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->erasesize = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: mtd->flags = %08x\n", mtd->flags);
+        dev_dbg(priv->dev, "fsl_elbc_init: mtd->size = %lld\n", mtd->size);
+        dev_dbg(priv->dev, "fsl_elbc_init: mtd->erasesize = %d\n",
                 mtd->erasesize);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->writesize = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: mtd->writesize = %d\n",
                 mtd->writesize);
-        dev_dbg(ctrl->dev, "fsl_elbc_init: mtd->oobsize = %d\n",
+        dev_dbg(priv->dev, "fsl_elbc_init: mtd->oobsize = %d\n",
                 mtd->oobsize);
 
         /* adjust Option Register and ECC to match Flash page size */
@@ -719,7 +720,7 @@ static int fsl_elbc_chip_init_tail(struct mtd_info *mtd)
                         chip->badblock_pattern = &largepage_memorybased;
                 }
         } else {
-                dev_err(ctrl->dev,
+                dev_err(priv->dev,
                         "fsl_elbc_init: page size %d is not supported\n",
                         mtd->writesize);
                 return -1;
@@ -750,18 +751,19 @@ static void fsl_elbc_write_page(struct mtd_info *mtd,
                                 const uint8_t *buf)
 {
         struct fsl_elbc_mtd *priv = chip->priv;
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
 
         fsl_elbc_write_buf(mtd, buf, mtd->writesize);
         fsl_elbc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
 
-        ctrl->oob_poi = chip->oob_poi;
+        elbc_fcm_ctrl->oob_poi = chip->oob_poi;
 }
 
 static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
 {
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
+        struct fsl_lbc_ctrl *ctrl = priv->ctrl;
         struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = ctrl->nand;
         struct nand_chip *chip = &priv->chip;
 
         dev_dbg(priv->dev, "eLBC Set Information for bank %d\n", priv->bank);
@@ -790,7 +792,7 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
         chip->options = NAND_NO_READRDY | NAND_NO_AUTOINCR |
                         NAND_USE_FLASH_BBT;
 
-        chip->controller = &ctrl->controller;
+        chip->controller = &elbc_fcm_ctrl->controller;
         chip->priv = priv;
 
         chip->ecc.read_page = fsl_elbc_read_page;
@@ -815,8 +817,7 @@ static int fsl_elbc_chip_init(struct fsl_elbc_mtd *priv)
 
 static int fsl_elbc_chip_remove(struct fsl_elbc_mtd *priv)
 {
-        struct fsl_elbc_ctrl *ctrl = priv->ctrl;
-
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = priv->ctrl->nand;
         nand_release(&priv->mtd);
 
         kfree(priv->mtd.name);
@@ -824,18 +825,21 @@ static int fsl_elbc_chip_remove(struct fsl_elbc_mtd *priv)
         if (priv->vbase)
                 iounmap(priv->vbase);
 
-        ctrl->chips[priv->bank] = NULL;
+        elbc_fcm_ctrl->chips[priv->bank] = NULL;
         kfree(priv);
-
+        kfree(elbc_fcm_ctrl);
         return 0;
 }
 
-static int __devinit fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
-                                         struct device_node *node)
+static DEFINE_MUTEX(fsl_elbc_nand_mutex);
+
+static int __devinit fsl_elbc_nand_probe(struct platform_device *pdev)
 {
-        struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
+        struct fsl_lbc_regs __iomem *lbc;
         struct fsl_elbc_mtd *priv;
         struct resource res;
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl;
+
 #ifdef CONFIG_MTD_PARTITIONS
         static const char *part_probe_types[]
                 = { "cmdlinepart", "RedBoot", NULL };
@@ -843,11 +847,18 @@ static int __devinit fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
 #endif
         int ret;
         int bank;
+        struct device *dev;
+        struct device_node *node = pdev->dev.of_node;
+
+        if (!fsl_lbc_ctrl_dev || !fsl_lbc_ctrl_dev->regs)
+                return -ENODEV;
+        lbc = fsl_lbc_ctrl_dev->regs;
+        dev = fsl_lbc_ctrl_dev->dev;
 
         /* get, allocate and map the memory resource */
         ret = of_address_to_resource(node, 0, &res);
         if (ret) {
-                dev_err(ctrl->dev, "failed to get resource\n");
+                dev_err(dev, "failed to get resource\n");
                 return ret;
         }
 
@@ -861,7 +872,7 @@ static int __devinit fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
                         break;
 
         if (bank >= MAX_BANKS) {
-                dev_err(ctrl->dev, "address did not match any chip selects\n");
+                dev_err(dev, "address did not match any chip selects\n");
                 return -ENODEV;
         }
 
@@ -869,14 +880,33 @@ static int __devinit fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
         if (!priv)
                 return -ENOMEM;
 
-        ctrl->chips[bank] = priv;
+        mutex_lock(&fsl_elbc_nand_mutex);
+        if (!fsl_lbc_ctrl_dev->nand) {
+                elbc_fcm_ctrl = kzalloc(sizeof(*elbc_fcm_ctrl), GFP_KERNEL);
+                if (!elbc_fcm_ctrl) {
+                        dev_err(dev, "failed to allocate memory\n");
+                        mutex_unlock(&fsl_elbc_nand_mutex);
+                        ret = -ENOMEM;
+                        goto err;
+                }
+                elbc_fcm_ctrl->counter++;
+
+                spin_lock_init(&elbc_fcm_ctrl->controller.lock);
+                init_waitqueue_head(&elbc_fcm_ctrl->controller.wq);
+                fsl_lbc_ctrl_dev->nand = elbc_fcm_ctrl;
+        } else {
+                elbc_fcm_ctrl = fsl_lbc_ctrl_dev->nand;
+        }
+        mutex_unlock(&fsl_elbc_nand_mutex);
+
+        elbc_fcm_ctrl->chips[bank] = priv;
         priv->bank = bank;
-        priv->ctrl = ctrl;
-        priv->dev = ctrl->dev;
+        priv->ctrl = fsl_lbc_ctrl_dev;
+        priv->dev = dev;
 
         priv->vbase = ioremap(res.start, resource_size(&res));
         if (!priv->vbase) {
-                dev_err(ctrl->dev, "failed to map chip region\n");
+                dev_err(dev, "failed to map chip region\n");
                 ret = -ENOMEM;
                 goto err;
         }
@@ -933,171 +963,53 @@ err:
         return ret;
 }
 
-static int __devinit fsl_elbc_ctrl_init(struct fsl_elbc_ctrl *ctrl)
+static int fsl_elbc_nand_remove(struct platform_device *pdev)
 {
-        struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
-
-        /*
-         * NAND transactions can tie up the bus for a long time, so set the
-         * bus timeout to max by clearing LBCR[BMT] (highest base counter
-         * value) and setting LBCR[BMTPS] to the highest prescaler value.
-         */
-        clrsetbits_be32(&lbc->lbcr, LBCR_BMT, 15);
-
-        /* clear event registers */
-        setbits32(&lbc->ltesr, LTESR_NAND_MASK);
-        out_be32(&lbc->lteatr, 0);
-
-        /* Enable interrupts for any detected events */
-        out_be32(&lbc->lteir, LTESR_NAND_MASK);
-
-        ctrl->read_bytes = 0;
-        ctrl->index = 0;
-        ctrl->addr = NULL;
-
-        return 0;
-}
-
-static int fsl_elbc_ctrl_remove(struct platform_device *ofdev)
-{
-        struct fsl_elbc_ctrl *ctrl = dev_get_drvdata(&ofdev->dev);
         int i;
-
+        struct fsl_elbc_fcm_ctrl *elbc_fcm_ctrl = fsl_lbc_ctrl_dev->nand;
         for (i = 0; i < MAX_BANKS; i++)
-                if (ctrl->chips[i])
-                        fsl_elbc_chip_remove(ctrl->chips[i]);
-
-        if (ctrl->irq)
-                free_irq(ctrl->irq, ctrl);
-
-        if (ctrl->regs)
-                iounmap(ctrl->regs);
-
-        dev_set_drvdata(&ofdev->dev, NULL);
-        kfree(ctrl);
-        return 0;
-}
-
-/* NOTE: This interrupt is also used to report other localbus events,
- * such as transaction errors on other chipselects.  If we want to
- * capture those, we'll need to move the IRQ code into a shared
- * LBC driver.
- */
-
-static irqreturn_t fsl_elbc_ctrl_irq(int irqno, void *data)
-{
-        struct fsl_elbc_ctrl *ctrl = data;
-        struct fsl_lbc_regs __iomem *lbc = ctrl->regs;
-        __be32 status = in_be32(&lbc->ltesr) & LTESR_NAND_MASK;
-
-        if (status) {
-                out_be32(&lbc->ltesr, status);
-                out_be32(&lbc->lteatr, 0);
-
-                ctrl->irq_status = status;
-                smp_wmb();
-                wake_up(&ctrl->irq_wait);
-
-                return IRQ_HANDLED;
+                if (elbc_fcm_ctrl->chips[i])
+                        fsl_elbc_chip_remove(elbc_fcm_ctrl->chips[i]);
+
+        mutex_lock(&fsl_elbc_nand_mutex);
+        elbc_fcm_ctrl->counter--;
+        if (!elbc_fcm_ctrl->counter) {
+                fsl_lbc_ctrl_dev->nand = NULL;
+                kfree(elbc_fcm_ctrl);
         }
-
-        return IRQ_NONE;
-}
-
-/* fsl_elbc_ctrl_probe
- *
- * called by device layer when it finds a device matching
- * one our driver can handled. This code allocates all of
- * the resources needed for the controller only.  The
- * resources for the NAND banks themselves are allocated
- * in the chip probe function.
-*/
-
-static int __devinit fsl_elbc_ctrl_probe(struct platform_device *ofdev,
-                                         const struct of_device_id *match)
-{
-        struct device_node *child;
-        struct fsl_elbc_ctrl *ctrl;
-        int ret;
-
-        ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
-        if (!ctrl)
-                return -ENOMEM;
-
-        dev_set_drvdata(&ofdev->dev, ctrl);
-
-        spin_lock_init(&ctrl->controller.lock);
-        init_waitqueue_head(&ctrl->controller.wq);
-        init_waitqueue_head(&ctrl->irq_wait);
-
-        ctrl->regs = of_iomap(ofdev->dev.of_node, 0);
-        if (!ctrl->regs) {
-                dev_err(&ofdev->dev, "failed to get memory region\n");
-                ret = -ENODEV;
-                goto err;
-        }
-
-        ctrl->irq = of_irq_to_resource(ofdev->dev.of_node, 0, NULL);
-        if (ctrl->irq == NO_IRQ) {
-                dev_err(&ofdev->dev, "failed to get irq resource\n");
-                ret = -ENODEV;
-                goto err;
-        }
-
-        ctrl->dev = &ofdev->dev;
-
-        ret = fsl_elbc_ctrl_init(ctrl);
-        if (ret < 0)
-                goto err;
-
-        ret = request_irq(ctrl->irq, fsl_elbc_ctrl_irq, 0, "fsl-elbc", ctrl);
-        if (ret != 0) {
-                dev_err(&ofdev->dev, "failed to install irq (%d)\n",
-                        ctrl->irq);
-                ret = ctrl->irq;
-                goto err;
-        }
-
-        for_each_child_of_node(ofdev->dev.of_node, child)
-                if (of_device_is_compatible(child, "fsl,elbc-fcm-nand"))
-                        fsl_elbc_chip_probe(ctrl, child);
+        mutex_unlock(&fsl_elbc_nand_mutex);
 
         return 0;
 
-err:
-        fsl_elbc_ctrl_remove(ofdev);
-        return ret;
 }
 
-static const struct of_device_id fsl_elbc_match[] = {
-        {
-                .compatible = "fsl,elbc",
-        },
+static const struct of_device_id fsl_elbc_nand_match[] = {
+        { .compatible = "fsl,elbc-fcm-nand", },
         {}
 };
 
-static struct of_platform_driver fsl_elbc_ctrl_driver = {
+static struct platform_driver fsl_elbc_nand_driver = {
         .driver = {
-                .name = "fsl-elbc",
+                .name = "fsl,elbc-fcm-nand",
                 .owner = THIS_MODULE,
-                .of_match_table = fsl_elbc_match,
+                .of_match_table = fsl_elbc_nand_match,
         },
-        .probe = fsl_elbc_ctrl_probe,
-        .remove = fsl_elbc_ctrl_remove,
+        .probe = fsl_elbc_nand_probe,
+        .remove = fsl_elbc_nand_remove,
 };
 
-static int __init fsl_elbc_init(void)
+static int __init fsl_elbc_nand_init(void)
 {
-        return of_register_platform_driver(&fsl_elbc_ctrl_driver);
+        return platform_driver_register(&fsl_elbc_nand_driver);
 }
 
-static void __exit fsl_elbc_exit(void)
+static void __exit fsl_elbc_nand_exit(void)
 {
-        of_unregister_platform_driver(&fsl_elbc_ctrl_driver);
+        platform_driver_unregister(&fsl_elbc_nand_driver);
 }
 
-module_init(fsl_elbc_init);
-module_exit(fsl_elbc_exit);
+module_init(fsl_elbc_nand_init);
+module_exit(fsl_elbc_nand_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Freescale");