[PATCH V4 3/4] MTD: add support for imx23 and imx28
Huang Shijie
b32955 at freescale.com
Sat Apr 2 01:30:39 EDT 2011
Add the code for imx23 and imx28.
The imx23 and imx28 share most of the same code.
Signed-off-by: Huang Shijie <b32955 at freescale.com>
---
drivers/mtd/nand/gpmi-nfc/bch-mx23-mx28.h | 88 +++++
drivers/mtd/nand/gpmi-nfc/gpmi-mx23-mx28.h | 163 ++++++++
drivers/mtd/nand/gpmi-nfc/hal-mx23-mx28.c | 556 ++++++++++++++++++++++++++++
drivers/mtd/nand/gpmi-nfc/rom-mx23.c | 298 +++++++++++++++
drivers/mtd/nand/gpmi-nfc/rom-mx28.c | 66 ++++
5 files changed, 1171 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/nand/gpmi-nfc/bch-mx23-mx28.h
create mode 100644 drivers/mtd/nand/gpmi-nfc/gpmi-mx23-mx28.h
create mode 100644 drivers/mtd/nand/gpmi-nfc/hal-mx23-mx28.c
create mode 100644 drivers/mtd/nand/gpmi-nfc/rom-mx23.c
create mode 100644 drivers/mtd/nand/gpmi-nfc/rom-mx28.c
diff --git a/drivers/mtd/nand/gpmi-nfc/bch-mx23-mx28.h b/drivers/mtd/nand/gpmi-nfc/bch-mx23-mx28.h
new file mode 100644
index 0000000..90af8cf
--- /dev/null
+++ b/drivers/mtd/nand/gpmi-nfc/bch-mx23-mx28.h
@@ -0,0 +1,88 @@
+/*
+ * Freescale GPMI NFC NAND Flash Driver
+ *
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ * Copyright 2008 Embedded Alley Solutions, Inc.
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef __GPMI_NFC_BCH_REGS_H
+#define __GPMI_NFC_BCH_REGS_H
+
+/*============================================================================*/
+#define HW_BCH_CTRL 0x00000000
+#define HW_BCH_CTRL_SET 0x00000004
+#define HW_BCH_CTRL_CLR 0x00000008
+#define HW_BCH_CTRL_TOG 0x0000000c
+
+#define BM_BCH_CTRL_COMPLETE_IRQ_EN (1 << 8)
+#define BM_BCH_CTRL_COMPLETE_IRQ (1 << 0)
+
+/*============================================================================*/
+#define HW_BCH_STATUS0 0x00000010
+#define HW_BCH_MODE 0x00000020
+#define HW_BCH_ENCODEPTR 0x00000030
+#define HW_BCH_DATAPTR 0x00000040
+#define HW_BCH_METAPTR 0x00000050
+#define HW_BCH_LAYOUTSELECT 0x00000070
+
+/*============================================================================*/
+#define HW_BCH_FLASH0LAYOUT0 0x00000080
+
+#define BP_BCH_FLASH0LAYOUT0_NBLOCKS 24
+#define BM_BCH_FLASH0LAYOUT0_NBLOCKS (0xff << BP_BCH_FLASH0LAYOUT0_NBLOCKS)
+#define BF_BCH_FLASH0LAYOUT0_NBLOCKS(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT0_NBLOCKS) & BM_BCH_FLASH0LAYOUT0_NBLOCKS)
+
+#define BP_BCH_FLASH0LAYOUT0_META_SIZE 16
+#define BM_BCH_FLASH0LAYOUT0_META_SIZE (0xff << BP_BCH_FLASH0LAYOUT0_META_SIZE)
+#define BF_BCH_FLASH0LAYOUT0_META_SIZE(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT0_META_SIZE)\
+ & BM_BCH_FLASH0LAYOUT0_META_SIZE)
+
+#define BP_BCH_FLASH0LAYOUT0_ECC0 12
+#define BM_BCH_FLASH0LAYOUT0_ECC0 (0xf << BP_BCH_FLASH0LAYOUT0_ECC0)
+#define BF_BCH_FLASH0LAYOUT0_ECC0(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT0_ECC0) & BM_BCH_FLASH0LAYOUT0_ECC0)
+
+#define BP_BCH_FLASH0LAYOUT0_DATA0_SIZE 0
+#define BM_BCH_FLASH0LAYOUT0_DATA0_SIZE \
+ (0xfff << BP_BCH_FLASH0LAYOUT0_DATA0_SIZE)
+#define BF_BCH_FLASH0LAYOUT0_DATA0_SIZE(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT0_DATA0_SIZE)\
+ & BM_BCH_FLASH0LAYOUT0_DATA0_SIZE)
+
+/*============================================================================*/
+#define HW_BCH_FLASH0LAYOUT1 0x00000090
+
+#define BP_BCH_FLASH0LAYOUT1_PAGE_SIZE 16
+#define BM_BCH_FLASH0LAYOUT1_PAGE_SIZE \
+ (0xffff << BP_BCH_FLASH0LAYOUT1_PAGE_SIZE)
+#define BF_BCH_FLASH0LAYOUT1_PAGE_SIZE(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT1_PAGE_SIZE) \
+ & BM_BCH_FLASH0LAYOUT1_PAGE_SIZE)
+
+#define BP_BCH_FLASH0LAYOUT1_ECCN 12
+#define BM_BCH_FLASH0LAYOUT1_ECCN (0xf << BP_BCH_FLASH0LAYOUT1_ECCN)
+#define BF_BCH_FLASH0LAYOUT1_ECCN(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT1_ECCN) & BM_BCH_FLASH0LAYOUT1_ECCN)
+
+#define BP_BCH_FLASH0LAYOUT1_DATAN_SIZE 0
+#define BM_BCH_FLASH0LAYOUT1_DATAN_SIZE \
+ (0xfff << BP_BCH_FLASH0LAYOUT1_DATAN_SIZE)
+#define BF_BCH_FLASH0LAYOUT1_DATAN_SIZE(v) \
+ (((v) << BP_BCH_FLASH0LAYOUT1_DATAN_SIZE) \
+ & BM_BCH_FLASH0LAYOUT1_DATAN_SIZE)
+#endif
diff --git a/drivers/mtd/nand/gpmi-nfc/gpmi-mx23-mx28.h b/drivers/mtd/nand/gpmi-nfc/gpmi-mx23-mx28.h
new file mode 100644
index 0000000..1565650
--- /dev/null
+++ b/drivers/mtd/nand/gpmi-nfc/gpmi-mx23-mx28.h
@@ -0,0 +1,163 @@
+/*
+ * Freescale GPMI NFC NAND Flash Driver
+ *
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
+ * Copyright 2008 Embedded Alley Solutions, Inc.
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#ifndef __GPMI_NFC_GPMI_REGS_H
+#define __GPMI_NFC_GPMI_REGS_H
+
+/*============================================================================*/
+#define HW_GPMI_CTRL0 0x00000000
+#define HW_GPMI_CTRL0_SET 0x00000004
+#define HW_GPMI_CTRL0_CLR 0x00000008
+#define HW_GPMI_CTRL0_TOG 0x0000000c
+
+#define BP_GPMI_CTRL0_COMMAND_MODE 24
+#define BM_GPMI_CTRL0_COMMAND_MODE (3 << BP_GPMI_CTRL0_COMMAND_MODE)
+#define BF_GPMI_CTRL0_COMMAND_MODE(v) \
+ (((v) << BP_GPMI_CTRL0_COMMAND_MODE) & BM_GPMI_CTRL0_COMMAND_MODE)
+#define BV_GPMI_CTRL0_COMMAND_MODE__WRITE 0x0
+#define BV_GPMI_CTRL0_COMMAND_MODE__READ 0x1
+#define BV_GPMI_CTRL0_COMMAND_MODE__READ_AND_COMPARE 0x2
+#define BV_GPMI_CTRL0_COMMAND_MODE__WAIT_FOR_READY 0x3
+
+#define BM_GPMI_CTRL0_WORD_LENGTH (1 << 23)
+#define BV_GPMI_CTRL0_WORD_LENGTH__16_BIT 0x0
+#define BV_GPMI_CTRL0_WORD_LENGTH__8_BIT 0x1
+
+/* different in CS between imx23 and imx28 */
+#define BP_GPMI_CTRL0_CS 20
+#define MX23_BM_GPMI_CTRL0_CS (3 << BP_GPMI_CTRL0_CS)
+#define MX28_BM_GPMI_CTRL0_CS (7 << BP_GPMI_CTRL0_CS)
+#define BF_GPMI_CTRL0_CS(v, x) (((v) << 20) & (CPU_IS_MX23((x)) \
+ ? MX23_BM_GPMI_CTRL0_CS \
+ : MX28_BM_GPMI_CTRL0_CS))
+
+#define BP_GPMI_CTRL0_ADDRESS 17
+#define BM_GPMI_CTRL0_ADDRESS (3 << BP_GPMI_CTRL0_ADDRESS)
+#define BF_GPMI_CTRL0_ADDRESS(v) \
+ (((v) << BP_GPMI_CTRL0_ADDRESS) & BM_GPMI_CTRL0_ADDRESS)
+#define BV_GPMI_CTRL0_ADDRESS__NAND_DATA 0x0
+#define BV_GPMI_CTRL0_ADDRESS__NAND_CLE 0x1
+#define BV_GPMI_CTRL0_ADDRESS__NAND_ALE 0x2
+
+#define BM_GPMI_CTRL0_ADDRESS_INCREMENT (1 << 16)
+#define BV_GPMI_CTRL0_ADDRESS_INCREMENT__DISABLED 0x0
+#define BV_GPMI_CTRL0_ADDRESS_INCREMENT__ENABLED 0x1
+
+#define BP_GPMI_CTRL0_XFER_COUNT 0
+#define BM_GPMI_CTRL0_XFER_COUNT (0xffff << BP_GPMI_CTRL0_XFER_COUNT)
+#define BF_GPMI_CTRL0_XFER_COUNT(v) \
+ (((v) << BP_GPMI_CTRL0_XFER_COUNT) & BM_GPMI_CTRL0_XFER_COUNT)
+
+/*============================================================================*/
+#define HW_GPMI_COMPARE 0x00000010
+/*============================================================================*/
+#define HW_GPMI_ECCCTRL 0x00000020
+#define HW_GPMI_ECCCTRL_SET 0x00000024
+#define HW_GPMI_ECCCTRL_CLR 0x00000028
+#define HW_GPMI_ECCCTRL_TOG 0x0000002c
+
+#define BP_GPMI_ECCCTRL_ECC_CMD 13
+#define BM_GPMI_ECCCTRL_ECC_CMD (3 << BP_GPMI_ECCCTRL_ECC_CMD)
+#define BF_GPMI_ECCCTRL_ECC_CMD(v) \
+ (((v) << BP_GPMI_ECCCTRL_ECC_CMD) & BM_GPMI_ECCCTRL_ECC_CMD)
+#define BV_GPMI_ECCCTRL_ECC_CMD__BCH_DECODE 0x0
+#define BV_GPMI_ECCCTRL_ECC_CMD__BCH_ENCODE 0x1
+
+#define BM_GPMI_ECCCTRL_ENABLE_ECC (1 << 12)
+#define BV_GPMI_ECCCTRL_ENABLE_ECC__ENABLE 0x1
+#define BV_GPMI_ECCCTRL_ENABLE_ECC__DISABLE 0x0
+
+#define BP_GPMI_ECCCTRL_BUFFER_MASK 0
+#define BM_GPMI_ECCCTRL_BUFFER_MASK (0x1ff << BP_GPMI_ECCCTRL_BUFFER_MASK)
+#define BF_GPMI_ECCCTRL_BUFFER_MASK(v) \
+ (((v) << BP_GPMI_ECCCTRL_BUFFER_MASK) & BM_GPMI_ECCCTRL_BUFFER_MASK)
+#define BV_GPMI_ECCCTRL_BUFFER_MASK__BCH_AUXONLY 0x100
+#define BV_GPMI_ECCCTRL_BUFFER_MASK__BCH_PAGE 0x1FF
+
+/*============================================================================*/
+#define HW_GPMI_ECCCOUNT 0x00000030
+#define HW_GPMI_PAYLOAD 0x00000040
+#define HW_GPMI_AUXILIARY 0x00000050
+/*============================================================================*/
+#define HW_GPMI_CTRL1 0x00000060
+#define HW_GPMI_CTRL1_SET 0x00000064
+#define HW_GPMI_CTRL1_CLR 0x00000068
+#define HW_GPMI_CTRL1_TOG 0x0000006c
+
+#define BM_GPMI_CTRL1_BCH_MODE (1 << 18)
+
+#define BP_GPMI_CTRL1_DLL_ENABLE 17
+#define BM_GPMI_CTRL1_DLL_ENABLE (1 << BP_GPMI_CTRL1_DLL_ENABLE)
+
+#define BP_GPMI_CTRL1_HALF_PERIOD 16
+#define BM_GPMI_CTRL1_HALF_PERIOD (1 << BP_GPMI_CTRL1_HALF_PERIOD)
+
+#define BP_GPMI_CTRL1_RDN_DELAY 12
+#define BM_GPMI_CTRL1_RDN_DELAY (0xf << BP_GPMI_CTRL1_RDN_DELAY)
+#define BF_GPMI_CTRL1_RDN_DELAY(v) \
+ (((v) << BP_GPMI_CTRL1_RDN_DELAY) & BM_GPMI_CTRL1_RDN_DELAY)
+
+#define BM_GPMI_CTRL1_DEV_RESET (1 << 3)
+#define BV_GPMI_CTRL1_DEV_RESET__ENABLED 0x0
+#define BV_GPMI_CTRL1_DEV_RESET__DISABLED 0x1
+
+#define BM_GPMI_CTRL1_ATA_IRQRDY_POLARITY (1 << 2)
+#define BV_GPMI_CTRL1_ATA_IRQRDY_POLARITY__ACTIVELOW 0x0
+#define BV_GPMI_CTRL1_ATA_IRQRDY_POLARITY__ACTIVEHIGH 0x1
+
+#define BM_GPMI_CTRL1_CAMERA_MODE (1 << 1)
+#define BV_GPMI_CTRL1_GPMI_MODE__NAND 0x0
+#define BV_GPMI_CTRL1_GPMI_MODE__ATA 0x1
+
+#define BM_GPMI_CTRL1_GPMI_MODE (1 << 0)
+
+/*============================================================================*/
+#define HW_GPMI_TIMING0 0x00000070
+
+#define BP_GPMI_TIMING0_ADDRESS_SETUP 16
+#define BM_GPMI_TIMING0_ADDRESS_SETUP (0xff << BP_GPMI_TIMING0_ADDRESS_SETUP)
+#define BF_GPMI_TIMING0_ADDRESS_SETUP(v) \
+ (((v) << BP_GPMI_TIMING0_ADDRESS_SETUP) & BM_GPMI_TIMING0_ADDRESS_SETUP)
+
+#define BP_GPMI_TIMING0_DATA_HOLD 8
+#define BM_GPMI_TIMING0_DATA_HOLD (0xff << BP_GPMI_TIMING0_DATA_HOLD)
+#define BF_GPMI_TIMING0_DATA_HOLD(v) \
+ (((v) << BP_GPMI_TIMING0_DATA_HOLD) & BM_GPMI_TIMING0_DATA_HOLD)
+
+#define BP_GPMI_TIMING0_DATA_SETUP 0
+#define BM_GPMI_TIMING0_DATA_SETUP (0xff << BP_GPMI_TIMING0_DATA_SETUP)
+#define BF_GPMI_TIMING0_DATA_SETUP(v) \
+ (((v) << BP_GPMI_TIMING0_DATA_SETUP) & BM_GPMI_TIMING0_DATA_SETUP)
+
+/*============================================================================*/
+#define HW_GPMI_TIMING1 0x00000080
+#define HW_GPMI_TIMING2 0x00000090
+#define HW_GPMI_DATA 0x000000a0
+/*============================ MX28 uses this to detect READY ================*/
+#define HW_GPMI_STAT 0x000000b0
+#define MX28_BP_GPMI_STAT_READY_BUSY 24
+#define MX28_BM_GPMI_STAT_READY_BUSY (0xff << MX28_BP_GPMI_STAT_READY_BUSY)
+#define MX28_BF_GPMI_STAT_READY_BUSY(v) \
+ (((v) << MX28_BP_GPMI_STAT_READY_BUSY) & MX28_BM_GPMI_STAT_READY_BUSY)
+/*============================ MX23 uses this to detect READY ================*/
+#define HW_GPMI_DEBUG 0x000000c0
+#define MX23_BP_GPMI_DEBUG_READY0 28
+#define MX23_BM_GPMI_DEBUG_READY0 (1 << MX23_BP_GPMI_DEBUG_READY0)
+#endif
diff --git a/drivers/mtd/nand/gpmi-nfc/hal-mx23-mx28.c b/drivers/mtd/nand/gpmi-nfc/hal-mx23-mx28.c
new file mode 100644
index 0000000..b907b5b
--- /dev/null
+++ b/drivers/mtd/nand/gpmi-nfc/hal-mx23-mx28.c
@@ -0,0 +1,556 @@
+/*
+ * Freescale GPMI NFC NAND Flash Driver
+ *
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
+ * Copyright (C) 2008 Embedded Alley Solutions, Inc.
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include "gpmi-nfc.h"
+#include "gpmi-mx23-mx28.h"
+#include "bch-mx23-mx28.h"
+
+static int init_hal(struct gpmi_nfc_data *this)
+{
+ struct resources *resources = &this->resources;
+
+ /* Enable the clock */
+ clk_enable(resources->clock);
+
+ /* Reset the GPMI block. */
+ mxs_reset_block(resources->gpmi_regs);
+
+ /* Choose NAND mode. */
+ __raw_writel(BM_GPMI_CTRL1_GPMI_MODE,
+ resources->gpmi_regs + HW_GPMI_CTRL1_CLR);
+
+ /* Set the IRQ polarity. */
+ __raw_writel(BM_GPMI_CTRL1_ATA_IRQRDY_POLARITY,
+ resources->gpmi_regs + HW_GPMI_CTRL1_SET);
+
+ /* Disable write protection. */
+ __raw_writel(BM_GPMI_CTRL1_DEV_RESET,
+ resources->gpmi_regs + HW_GPMI_CTRL1_SET);
+
+ /* Select BCH ECC. */
+ __raw_writel(BM_GPMI_CTRL1_BCH_MODE,
+ resources->gpmi_regs + HW_GPMI_CTRL1_SET);
+
+ /* Disable the clock. */
+ clk_disable(resources->clock);
+ return 0;
+}
+
+/* Configures the NFC geometry for BCH. */
+static int set_geometry(struct gpmi_nfc_data *this)
+{
+ struct resources *resources = &this->resources;
+ struct nfc_geometry *nfc = &this->nfc_geometry;
+ unsigned int block_count;
+ unsigned int block_size;
+ unsigned int metadata_size;
+ unsigned int ecc_strength;
+ unsigned int page_size;
+
+ if (common_nfc_set_geometry(this))
+ return !0;
+
+ block_count = nfc->ecc_chunk_count - 1;
+ block_size = nfc->ecc_chunk_size_in_bytes;
+ metadata_size = nfc->metadata_size_in_bytes;
+ ecc_strength = nfc->ecc_strength >> 1;
+ page_size = nfc->page_size_in_bytes;
+
+ clk_enable(resources->clock);
+
+ /*
+ * Reset the BCH block. Notice that we pass in true for the just_enable
+ * flag. This is because the soft reset for the version 0 BCH block
+ * doesn't work. If you try to soft reset the BCH block, it becomes
+ * unusable until the next hard reset.
+ */
+ mxs_reset_block(resources->bch_regs);
+
+ /* Configure layout 0. */
+ __raw_writel(BF_BCH_FLASH0LAYOUT0_NBLOCKS(block_count)
+ | BF_BCH_FLASH0LAYOUT0_META_SIZE(metadata_size)
+ | BF_BCH_FLASH0LAYOUT0_ECC0(ecc_strength)
+ | BF_BCH_FLASH0LAYOUT0_DATA0_SIZE(block_size),
+ resources->bch_regs + HW_BCH_FLASH0LAYOUT0);
+
+ __raw_writel(BF_BCH_FLASH0LAYOUT1_PAGE_SIZE(page_size)
+ | BF_BCH_FLASH0LAYOUT1_ECCN(ecc_strength)
+ | BF_BCH_FLASH0LAYOUT1_DATAN_SIZE(block_size),
+ resources->bch_regs + HW_BCH_FLASH0LAYOUT1);
+
+ /* Set *all* chip selects to use layout 0. */
+ __raw_writel(0, resources->bch_regs + HW_BCH_LAYOUTSELECT);
+
+ /* Enable interrupts. */
+ __raw_writel(BM_BCH_CTRL_COMPLETE_IRQ_EN,
+ resources->bch_regs + HW_BCH_CTRL_SET);
+
+ clk_disable(resources->clock);
+ return 0;
+}
+
+static int set_timing(struct gpmi_nfc_data *this,
+ const struct nand_timing *timing)
+{
+ struct nfc_hal *nfc = this->nfc;
+
+ nfc->timing = *timing;
+ return 0;
+}
+
+/**
+ * get_timing() - Retrieves the NFC hardware timing.
+ *
+ * @this: Per-device data.
+ * @clock_frequency_in_hz: The clock frequency, in Hz, during the current
+ * I/O transaction. If no I/O transaction is in
+ * progress, this is the clock frequency during the
+ * most recent I/O transaction.
+ * @hardware_timing: The hardware timing configuration in effect during
+ * the current I/O transaction. If no I/O transaction
+ * is in progress, this is the hardware timing
+ * configuration during the most recent I/O
+ * transaction.
+ */
+static void get_timing(struct gpmi_nfc_data *this,
+ unsigned long *clock_frequency_in_hz,
+ struct gpmi_nfc_hardware_timing *hardware_timing)
+{
+ struct resources *resources = &this->resources;
+ struct nfc_hal *nfc = this->nfc;
+ unsigned char *gpmi_regs = resources->gpmi_regs;
+ uint32_t register_image;
+
+ /* Return the clock frequency. */
+ *clock_frequency_in_hz = nfc->clock_frequency_in_hz;
+
+ /* We'll be reading the hardware, so let's enable the clock. */
+ clk_enable(resources->clock);
+
+ /* Retrieve the hardware timing. */
+ register_image = __raw_readl(gpmi_regs + HW_GPMI_TIMING0);
+
+ hardware_timing->data_setup_in_cycles =
+ (register_image & BM_GPMI_TIMING0_DATA_SETUP) >>
+ BP_GPMI_TIMING0_DATA_SETUP;
+
+ hardware_timing->data_hold_in_cycles =
+ (register_image & BM_GPMI_TIMING0_DATA_HOLD) >>
+ BP_GPMI_TIMING0_DATA_HOLD;
+
+ hardware_timing->address_setup_in_cycles =
+ (register_image & BM_GPMI_TIMING0_ADDRESS_SETUP) >>
+ BP_GPMI_TIMING0_ADDRESS_SETUP;
+
+ register_image = __raw_readl(gpmi_regs + HW_GPMI_CTRL1);
+
+ hardware_timing->use_half_periods =
+ (register_image & BM_GPMI_CTRL1_HALF_PERIOD) >>
+ BP_GPMI_CTRL1_HALF_PERIOD;
+
+ hardware_timing->sample_delay_factor =
+ (register_image & BM_GPMI_CTRL1_RDN_DELAY) >>
+ BP_GPMI_CTRL1_RDN_DELAY;
+
+ /* We're done reading the hardware, so disable the clock. */
+ clk_disable(resources->clock);
+}
+
+static void exit(struct gpmi_nfc_data *this)
+{
+}
+
+/* Begin the I/O */
+static void begin(struct gpmi_nfc_data *this)
+{
+ struct resources *resources = &this->resources;
+ struct nfc_hal *nfc = this->nfc;
+ struct gpmi_nfc_hardware_timing hw;
+ unsigned char *gpmi_regs = resources->gpmi_regs;
+ unsigned int clock_period_in_ns;
+ uint32_t register_image;
+ unsigned int dll_wait_time_in_us;
+
+ /* Enable the clock. */
+ clk_enable(resources->clock);
+
+ /* set the timing for imx23 */
+ if (!CPU_IS_MX23(this))
+ return;
+
+ /* Get the timing information we need. */
+ nfc->clock_frequency_in_hz = clk_get_rate(resources->clock);
+ clock_period_in_ns = 1000000000 / nfc->clock_frequency_in_hz;
+
+ gpmi_nfc_compute_hardware_timing(this, &hw);
+
+ /* Set up all the simple timing parameters. */
+ register_image =
+ BF_GPMI_TIMING0_ADDRESS_SETUP(hw.address_setup_in_cycles) |
+ BF_GPMI_TIMING0_DATA_HOLD(hw.data_hold_in_cycles) |
+ BF_GPMI_TIMING0_DATA_SETUP(hw.data_setup_in_cycles) ;
+
+ __raw_writel(register_image, gpmi_regs + HW_GPMI_TIMING0);
+
+ /*
+ * HEY - PAY ATTENTION!
+ *
+ * DLL_ENABLE must be set to zero when setting RDN_DELAY or HALF_PERIOD.
+ */
+ __raw_writel(BM_GPMI_CTRL1_DLL_ENABLE, gpmi_regs + HW_GPMI_CTRL1_CLR);
+
+ /* Clear out the DLL control fields. */
+ __raw_writel(BM_GPMI_CTRL1_RDN_DELAY, gpmi_regs + HW_GPMI_CTRL1_CLR);
+ __raw_writel(BM_GPMI_CTRL1_HALF_PERIOD, gpmi_regs + HW_GPMI_CTRL1_CLR);
+
+ /* If no sample delay is called for, return immediately. */
+ if (!hw.sample_delay_factor)
+ return;
+
+ /* Configure the HALF_PERIOD flag. */
+
+ if (hw.use_half_periods)
+ __raw_writel(BM_GPMI_CTRL1_HALF_PERIOD,
+ gpmi_regs + HW_GPMI_CTRL1_SET);
+
+ /* Set the delay factor. */
+ __raw_writel(BF_GPMI_CTRL1_RDN_DELAY(hw.sample_delay_factor),
+ gpmi_regs + HW_GPMI_CTRL1_SET);
+
+ /* Enable the DLL. */
+ __raw_writel(BM_GPMI_CTRL1_DLL_ENABLE, gpmi_regs + HW_GPMI_CTRL1_SET);
+
+ /*
+ * After we enable the GPMI DLL, we have to wait 64 clock cycles before
+ * we can use the GPMI.
+ *
+ * Calculate the amount of time we need to wait, in microseconds.
+ */
+ dll_wait_time_in_us = (clock_period_in_ns * 64) / 1000;
+
+ if (!dll_wait_time_in_us)
+ dll_wait_time_in_us = 1;
+
+ /* Wait for the DLL to settle. */
+ udelay(dll_wait_time_in_us);
+}
+
+static void end(struct gpmi_nfc_data *this)
+{
+ struct resources *resources = &this->resources;
+ clk_disable(resources->clock);
+}
+
+/* Clears a BCH interrupt. */
+static void clear_bch(struct gpmi_nfc_data *this)
+{
+ struct resources *r = &this->resources;
+ __raw_writel(BM_BCH_CTRL_COMPLETE_IRQ, r->bch_regs + HW_BCH_CTRL_CLR);
+}
+
+/* Returns the Ready/Busy status of the given chip. */
+static int is_ready(struct gpmi_nfc_data *this, unsigned chip)
+{
+ struct resources *resources = &this->resources;
+ uint32_t mask;
+ uint32_t reg;
+
+ if (CPU_IS_MX23(this)) {
+ mask = MX23_BM_GPMI_DEBUG_READY0 << chip;
+ reg = __raw_readl(resources->gpmi_regs + HW_GPMI_DEBUG);
+ } else if (CPU_IS_MX28(this)) {
+ mask = MX28_BF_GPMI_STAT_READY_BUSY(1 << chip);
+ reg = __raw_readl(resources->gpmi_regs + HW_GPMI_STAT);
+ } else
+ BUG();
+ return !!(reg & mask);
+}
+
+static int send_command(struct gpmi_nfc_data *this)
+{
+ struct dma_chan *channel = get_dma_chan(this);
+ struct mil *mil = &this->mil;
+ struct dma_async_tx_descriptor *desc;
+ struct scatterlist *sgl;
+ u32 pio[3];
+
+ /* [1] send out the PIO words */
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(BV_GPMI_CTRL0_COMMAND_MODE__WRITE)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(mil->current_chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(BV_GPMI_CTRL0_ADDRESS__NAND_CLE)
+ | BM_GPMI_CTRL0_ADDRESS_INCREMENT
+ | BF_GPMI_CTRL0_XFER_COUNT(mil->command_length);
+ pio[1] = pio[2] = 0;
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio,
+ ARRAY_SIZE(pio), DMA_NONE, 0);
+ if (!desc) {
+ log("step 1 error");
+ return -1;
+ }
+
+ /* [2] send out the COMMAND + ADDRESS string stored in @buffer */
+ sgl = &mil->cmd_sgl;
+
+ sg_init_one(sgl, mil->cmd_buffer, mil->command_length);
+ dma_map_sg(this->dev, sgl, 1, DMA_TO_DEVICE);
+ desc = channel->device->device_prep_slave_sg(channel,
+ sgl, 1, DMA_TO_DEVICE, 1);
+ if (!desc) {
+ log("error");
+ return -1;
+ }
+
+ /* [3] submit the DMA */
+ this->dma_type = DMA_FOR_COMMAND;
+ start_dma_without_bch_irq(this, desc);
+ return 0;
+}
+
+static int send_data(struct gpmi_nfc_data *this)
+{
+ struct dma_async_tx_descriptor *desc;
+ struct dma_chan *channel = get_dma_chan(this);
+ struct mil *mil = &this->mil;
+ uint32_t command_mode;
+ uint32_t address;
+ u32 pio[2];
+
+ /* [1] PIO */
+ command_mode = BV_GPMI_CTRL0_COMMAND_MODE__WRITE;
+ address = BV_GPMI_CTRL0_ADDRESS__NAND_DATA;
+
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(command_mode)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(mil->current_chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(address)
+ | BF_GPMI_CTRL0_XFER_COUNT(mil->upper_len);
+ pio[1] = 0;
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio,
+ ARRAY_SIZE(pio), DMA_NONE, 0);
+ if (!desc) {
+ log("step 1 error");
+ return -1;
+ }
+
+ /* [2] send DMA request */
+ prepare_data_dma(this, DMA_TO_DEVICE);
+ desc = channel->device->device_prep_slave_sg(channel, &mil->data_sgl,
+ 1, DMA_TO_DEVICE, 1);
+ if (!desc) {
+ log("step 2 error");
+ return -1;
+ }
+ /* [3] submit the DMA */
+ this->dma_type = DMA_FOR_WRITE_DATA;
+ start_dma_without_bch_irq(this, desc);
+ return 0;
+}
+
+static int read_data(struct gpmi_nfc_data *this)
+{
+ struct dma_async_tx_descriptor *desc;
+ struct dma_chan *channel = get_dma_chan(this);
+ struct mil *mil = &this->mil;
+ u32 pio[2];
+
+ /* [1] : send PIO */
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(BV_GPMI_CTRL0_COMMAND_MODE__READ)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(mil->current_chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(BV_GPMI_CTRL0_ADDRESS__NAND_DATA)
+ | BF_GPMI_CTRL0_XFER_COUNT(mil->upper_len);
+ pio[1] = 0;
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio,
+ ARRAY_SIZE(pio), DMA_NONE, 0);
+ if (!desc) {
+ log("step 1 error");
+ return -1;
+ }
+
+ /* [2] : send DMA request */
+ prepare_data_dma(this, DMA_FROM_DEVICE);
+ desc = channel->device->device_prep_slave_sg(channel, &mil->data_sgl,
+ 1, DMA_FROM_DEVICE, 1);
+ if (!desc) {
+ log("step 2 error");
+ return -1;
+ }
+
+ /* [3] : submit the DMA */
+ this->dma_type = DMA_FOR_READ_DATA;
+ start_dma_without_bch_irq(this, desc);
+ return 0;
+}
+
+static int send_page(struct gpmi_nfc_data *this,
+ dma_addr_t payload, dma_addr_t auxiliary)
+{
+ struct nfc_geometry *geo = &this->nfc_geometry;
+ uint32_t command_mode;
+ uint32_t address;
+ uint32_t ecc_command;
+ uint32_t buffer_mask;
+ struct dma_async_tx_descriptor *desc;
+ struct dma_chan *channel = get_dma_chan(this);
+ struct mil *mil = &this->mil;
+ int chip = mil->current_chip;
+ u32 pio[6];
+
+ /* A DMA descriptor that does an ECC page read. */
+ command_mode = BV_GPMI_CTRL0_COMMAND_MODE__WRITE;
+ address = BV_GPMI_CTRL0_ADDRESS__NAND_DATA;
+ ecc_command = BV_GPMI_ECCCTRL_ECC_CMD__BCH_ENCODE;
+ buffer_mask = BV_GPMI_ECCCTRL_BUFFER_MASK__BCH_PAGE |
+ BV_GPMI_ECCCTRL_BUFFER_MASK__BCH_AUXONLY;
+
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(command_mode)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(address)
+ | BF_GPMI_CTRL0_XFER_COUNT(0);
+ pio[1] = 0;
+ pio[2] = BM_GPMI_ECCCTRL_ENABLE_ECC
+ | BF_GPMI_ECCCTRL_ECC_CMD(ecc_command)
+ | BF_GPMI_ECCCTRL_BUFFER_MASK(buffer_mask);
+ pio[3] = geo->page_size_in_bytes;
+ pio[4] = payload;
+ pio[5] = auxiliary;
+
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio,
+ ARRAY_SIZE(pio), DMA_NONE, 0);
+ if (!desc) {
+ log("step 2 error");
+ return -1;
+ }
+ this->dma_type = DMA_FOR_WRITE_ECC_PAGE;
+ return start_dma_with_bch_irq(this, desc);
+}
+
+static int read_page(struct gpmi_nfc_data *this,
+ dma_addr_t payload, dma_addr_t auxiliary)
+{
+ struct nfc_geometry *geo = &this->nfc_geometry;
+ uint32_t command_mode;
+ uint32_t address;
+ uint32_t ecc_command;
+ uint32_t buffer_mask;
+
+ struct dma_async_tx_descriptor *desc;
+ struct dma_chan *channel = get_dma_chan(this);
+ struct mil *mil = &this->mil;
+ int chip = mil->current_chip;
+ u32 pio[6];
+
+ /* [1] Wait for the chip to report ready. */
+ command_mode = BV_GPMI_CTRL0_COMMAND_MODE__WAIT_FOR_READY;
+ address = BV_GPMI_CTRL0_ADDRESS__NAND_DATA;
+
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(command_mode)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(address)
+ | BF_GPMI_CTRL0_XFER_COUNT(0);
+ pio[1] = 0;
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio, 2, DMA_NONE, 0);
+ if (!desc) {
+ log("step 1 error");
+ return -1;
+ }
+
+ /* [2] Enable the BCH block and read. */
+ command_mode = BV_GPMI_CTRL0_COMMAND_MODE__READ;
+ address = BV_GPMI_CTRL0_ADDRESS__NAND_DATA;
+ ecc_command = BV_GPMI_ECCCTRL_ECC_CMD__BCH_DECODE;
+ buffer_mask = BV_GPMI_ECCCTRL_BUFFER_MASK__BCH_PAGE
+ | BV_GPMI_ECCCTRL_BUFFER_MASK__BCH_AUXONLY;
+
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(command_mode)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(address)
+ | BF_GPMI_CTRL0_XFER_COUNT(geo->page_size_in_bytes);
+
+ pio[1] = 0;
+ pio[2] = BM_GPMI_ECCCTRL_ENABLE_ECC
+ | BF_GPMI_ECCCTRL_ECC_CMD(ecc_command)
+ | BF_GPMI_ECCCTRL_BUFFER_MASK(buffer_mask);
+ pio[3] = geo->page_size_in_bytes;
+ pio[4] = payload;
+ pio[5] = auxiliary;
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio,
+ ARRAY_SIZE(pio), DMA_NONE, 1);
+ if (!desc) {
+ log("step 2 error");
+ return -1;
+ }
+
+ /* [3] Disable the BCH block */
+ command_mode = BV_GPMI_CTRL0_COMMAND_MODE__WAIT_FOR_READY;
+ address = BV_GPMI_CTRL0_ADDRESS__NAND_DATA;
+
+ pio[0] = BF_GPMI_CTRL0_COMMAND_MODE(command_mode)
+ | BM_GPMI_CTRL0_WORD_LENGTH
+ | BF_GPMI_CTRL0_CS(chip, this)
+ | BF_GPMI_CTRL0_ADDRESS(address)
+ | BF_GPMI_CTRL0_XFER_COUNT(geo->page_size_in_bytes);
+ pio[1] = 0;
+ desc = channel->device->device_prep_slave_sg(channel,
+ (struct scatterlist *)pio, 2, DMA_NONE, 1);
+ if (!desc) {
+ log("step 3 error");
+ return -1;
+ }
+
+ /* [4] submit the DMA */
+ this->dma_type = DMA_FOR_READ_ECC_PAGE;
+ return start_dma_with_bch_irq(this, desc);
+}
+
+struct nfc_hal gpmi_nfc_hal_imx23_imx28 = {
+ .description = "GPMI and BCH for IMX23/IMX28",
+ .max_data_setup_cycles = (BM_GPMI_TIMING0_DATA_SETUP >>
+ BP_GPMI_TIMING0_DATA_SETUP),
+ .internal_data_setup_in_ns = 0,
+ .max_sample_delay_factor = (BM_GPMI_CTRL1_RDN_DELAY >>
+ BP_GPMI_CTRL1_RDN_DELAY),
+ .max_dll_clock_period_in_ns = 32,
+ .max_dll_delay_in_ns = 16,
+ .init = init_hal,
+ .set_geometry = set_geometry,
+ .set_timing = set_timing,
+ .get_timing = get_timing,
+ .exit = exit,
+ .begin = begin,
+ .end = end,
+ .clear_bch = clear_bch,
+ .is_ready = is_ready,
+ .send_command = send_command,
+ .read_data = read_data,
+ .send_data = send_data,
+ .read_page = read_page,
+ .send_page = send_page,
+};
diff --git a/drivers/mtd/nand/gpmi-nfc/rom-mx23.c b/drivers/mtd/nand/gpmi-nfc/rom-mx23.c
new file mode 100644
index 0000000..0d2530f
--- /dev/null
+++ b/drivers/mtd/nand/gpmi-nfc/rom-mx23.c
@@ -0,0 +1,298 @@
+/*
+ * Freescale GPMI NFC NAND Flash Driver
+ *
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ * Copyright (C) 2008 Embedded Alley Solutions, Inc.
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include "gpmi-nfc.h"
+
+/* Useful variables for Boot ROM Helper version 0. */
+static const char *fingerprint = "STMP";
+
+/* Sets geometry for the Boot ROM Helper. */
+static int set_geometry(struct gpmi_nfc_data *this)
+{
+ struct gpmi_nfc_platform_data *pdata = this->pdata;
+ struct boot_rom_geometry *geometry = &this->rom_geometry;
+ struct nand_chip *nand = &this->mil.nand;
+ int error;
+
+ error = gpmi_nfc_rom_helper_set_geometry(this);
+ if (error)
+ return error;
+
+ if (!pdata->boot_area_size_in_bytes) {
+ geometry->boot_area_count = 0;
+ geometry->boot_area_size_in_bytes = 0;
+ return 0;
+ }
+
+ if (nand->numchips == 1) {
+ geometry->boot_area_count = 1;
+ geometry->boot_area_size_in_bytes =
+ pdata->boot_area_size_in_bytes * 2;
+ } else {
+ geometry->boot_area_count = 2;
+ geometry->boot_area_size_in_bytes =
+ pdata->boot_area_size_in_bytes;
+ }
+ return 0;
+}
+
+static int check_transcription_stamp(struct gpmi_nfc_data *this)
+{
+ struct boot_rom_geometry *rom_geo = &this->rom_geometry;
+ struct mil *mil = &this->mil;
+ struct mtd_info *mtd = &mil->mtd;
+ struct nand_chip *nand = &mil->nand;
+ unsigned int search_area_size_in_strides;
+ unsigned int stride;
+ unsigned int page;
+ loff_t byte;
+ uint8_t *buffer = nand->buffers->databuf;
+ int saved_chip_number;
+ int found_an_ncb_fingerprint = false;
+
+ /* Compute the number of strides in a search area. */
+ search_area_size_in_strides = 1 << rom_geo->search_area_stride_exponent;
+
+ /* Select chip 0. */
+ saved_chip_number = mil->current_chip;
+ nand->select_chip(mtd, 0);
+
+ /*
+ * Loop through the first search area, looking for the NCB fingerprint.
+ */
+ pr_info("Scanning for an NCB fingerprint...\n");
+
+ for (stride = 0; stride < search_area_size_in_strides; stride++) {
+ /* Compute the page and byte addresses. */
+ page = stride * rom_geo->stride_size_in_pages;
+ byte = page * mtd->writesize;
+
+ pr_info(" Looking for a fingerprint in page 0x%x\n", page);
+
+ /*
+ * Read the NCB fingerprint. The fingerprint is four bytes long
+ * and starts in the 12th byte of the page.
+ */
+ nand->cmdfunc(mtd, NAND_CMD_READ0, 12, page);
+ nand->read_buf(mtd, buffer, strlen(fingerprint));
+
+ /* Look for the fingerprint. */
+ if (!memcmp(buffer, fingerprint, strlen(fingerprint))) {
+ found_an_ncb_fingerprint = true;
+ break;
+ }
+
+ }
+
+ /* Deselect chip 0. */
+ nand->select_chip(mtd, saved_chip_number);
+
+ if (found_an_ncb_fingerprint)
+ pr_info(" Found a fingerprint\n");
+ else
+ pr_info(" No fingerprint found\n");
+ return found_an_ncb_fingerprint;
+}
+
+/* Writes a transcription stamp. */
+static int write_transcription_stamp(struct gpmi_nfc_data *this)
+{
+ struct device *dev = this->dev;
+ struct boot_rom_geometry *rom_geo = &this->rom_geometry;
+ struct mil *mil = &this->mil;
+ struct mtd_info *mtd = &mil->mtd;
+ struct nand_chip *nand = &mil->nand;
+ unsigned int block_size_in_pages;
+ unsigned int search_area_size_in_strides;
+ unsigned int search_area_size_in_pages;
+ unsigned int search_area_size_in_blocks;
+ unsigned int block;
+ unsigned int stride;
+ unsigned int page;
+ loff_t byte;
+ uint8_t *buffer = nand->buffers->databuf;
+ int saved_chip_number;
+ int status;
+
+ /* Compute the search area geometry. */
+ block_size_in_pages = mtd->erasesize / mtd->writesize;
+ search_area_size_in_strides = 1 << rom_geo->search_area_stride_exponent;
+ search_area_size_in_pages = search_area_size_in_strides *
+ rom_geo->stride_size_in_pages;
+ search_area_size_in_blocks =
+ (search_area_size_in_pages + (block_size_in_pages - 1)) /
+ block_size_in_pages;
+
+ pr_info("-------------------------------------------\n");
+ pr_info("Search Area Geometry\n");
+ pr_info("-------------------------------------------\n");
+ pr_info("Search Area Size in Blocks : %u", search_area_size_in_blocks);
+ pr_info("Search Area Size in Strides: %u", search_area_size_in_strides);
+ pr_info("Search Area Size in Pages : %u", search_area_size_in_pages);
+
+ /* Select chip 0. */
+ saved_chip_number = mil->current_chip;
+ nand->select_chip(mtd, 0);
+
+ /* Loop over blocks in the first search area, erasing them. */
+ pr_info("Erasing the search area...\n");
+
+ for (block = 0; block < search_area_size_in_blocks; block++) {
+ /* Compute the page address. */
+ page = block * block_size_in_pages;
+
+ /* Erase this block. */
+ pr_info(" Erasing block 0x%x\n", block);
+ nand->cmdfunc(mtd, NAND_CMD_ERASE1, -1, page);
+ nand->cmdfunc(mtd, NAND_CMD_ERASE2, -1, -1);
+
+ /* Wait for the erase to finish. */
+ status = nand->waitfunc(mtd, nand);
+ if (status & NAND_STATUS_FAIL)
+ dev_err(dev, "[%s] Erase failed.\n", __func__);
+ }
+
+ /* Write the NCB fingerprint into the page buffer. */
+ memset(buffer, ~0, mtd->writesize);
+ memset(nand->oob_poi, ~0, mtd->oobsize);
+ memcpy(buffer + 12, fingerprint, strlen(fingerprint));
+
+ /* Loop through the first search area, writing NCB fingerprints. */
+ pr_info("Writing NCB fingerprints...\n");
+ for (stride = 0; stride < search_area_size_in_strides; stride++) {
+ /* Compute the page and byte addresses. */
+ page = stride * rom_geo->stride_size_in_pages;
+ byte = page * mtd->writesize;
+
+ /* Write the first page of the current stride. */
+ pr_info(" Writing an NCB fingerprint in page 0x%x\n", page);
+ nand->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
+ nand->ecc.write_page_raw(mtd, nand, buffer);
+ nand->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+
+ /* Wait for the write to finish. */
+ status = nand->waitfunc(mtd, nand);
+ if (status & NAND_STATUS_FAIL)
+ dev_err(dev, "[%s] Write failed.\n", __func__);
+ }
+
+ /* Deselect chip 0. */
+ nand->select_chip(mtd, saved_chip_number);
+ return 0;
+}
+
+static int imx23_rom_extra_init(struct gpmi_nfc_data *this)
+{
+ struct device *dev = this->dev;
+ struct mil *mil = &this->mil;
+ struct nand_chip *nand = &mil->nand;
+ struct mtd_info *mtd = &mil->mtd;
+ unsigned int block_count;
+ unsigned int block;
+ int chip;
+ int page;
+ loff_t byte;
+ uint8_t block_mark;
+ int error = 0;
+
+ /*
+ * If control arrives here, we can't use block mark swapping, which
+ * means we're forced to use transcription. First, scan for the
+ * transcription stamp. If we find it, then we don't have to do
+ * anything -- the block marks are already transcribed.
+ */
+ if (check_transcription_stamp(this))
+ return 0;
+
+ /*
+ * If control arrives here, we couldn't find a transcription stamp, so
+ * so we presume the block marks are in the conventional location.
+ */
+ pr_info("Transcribing bad block marks...\n");
+
+ /* Compute the number of blocks in the entire medium. */
+ block_count = nand->chipsize >> nand->phys_erase_shift;
+
+ /*
+ * Loop over all the blocks in the medium, transcribing block marks as
+ * we go.
+ */
+ for (block = 0; block < block_count; block++) {
+ /*
+ * Compute the chip, page and byte addresses for this block's
+ * conventional mark.
+ */
+ chip = block >> (nand->chip_shift - nand->phys_erase_shift);
+ page = block << (nand->phys_erase_shift - nand->page_shift);
+ byte = block << nand->phys_erase_shift;
+
+ /* Select the chip. */
+ nand->select_chip(mtd, chip);
+
+ /* Send the command to read the conventional block mark. */
+ nand->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
+
+ /* Read the conventional block mark. */
+ block_mark = nand->read_byte(mtd);
+
+ /*
+ * Check if the block is marked bad. If so, we need to mark it
+ * again, but this time the result will be a mark in the
+ * location where we transcribe block marks.
+ *
+ * Notice that we have to explicitly set the marking_a_bad_block
+ * member before we call through the block_markbad function
+ * pointer in the owning struct nand_chip. If we could call
+ * though the block_markbad function pointer in the owning
+ * struct mtd_info, which we have hooked, then this would be
+ * taken care of for us. Unfortunately, we can't because that
+ * higher-level code path will do things like consulting the
+ * in-memory bad block table -- which doesn't even exist yet!
+ * So, we have to call at a lower level and handle some details
+ * ourselves.
+ */
+ if (block_mark != 0xff) {
+ pr_info("Transcribing mark in block %u\n", block);
+ mil->marking_a_bad_block = true;
+ error = nand->block_markbad(mtd, byte);
+ mil->marking_a_bad_block = false;
+ if (error)
+ dev_err(dev, "Failed to mark block bad with "
+ "error %d\n", error);
+ }
+
+ /* Deselect the chip. */
+ nand->select_chip(mtd, -1);
+ }
+
+ /* Write the stamp that indicates we've transcribed the block marks. */
+ write_transcription_stamp(this);
+ return 0;
+}
+
+/* This structure represents the Boot ROM Helper for this version. */
+struct boot_rom_helper gpmi_nfc_boot_rom_imx23 = {
+ .version = 0,
+ .description = "Single/dual-chip boot area, "
+ "no block mark swapping",
+ .swap_block_mark = false,
+ .set_geometry = set_geometry,
+ .rom_extra_init = imx23_rom_extra_init,
+};
diff --git a/drivers/mtd/nand/gpmi-nfc/rom-mx28.c b/drivers/mtd/nand/gpmi-nfc/rom-mx28.c
new file mode 100644
index 0000000..03be07f
--- /dev/null
+++ b/drivers/mtd/nand/gpmi-nfc/rom-mx28.c
@@ -0,0 +1,66 @@
+/*
+ * Freescale GPMI NFC NAND Flash Driver
+ *
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc.
+ * Copyright (C) 2008 Embedded Alley Solutions, Inc.
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include "gpmi-nfc.h"
+
+/* Sets geometry for the Boot ROM Helper. */
+static int set_geometry(struct gpmi_nfc_data *this)
+{
+ struct gpmi_nfc_platform_data *pdata = this->pdata;
+ struct boot_rom_geometry *geometry = &this->rom_geometry;
+ int error;
+
+ /* Version-independent geometry. */
+ error = gpmi_nfc_rom_helper_set_geometry(this);
+ if (error)
+ return error;
+
+ /*
+ * Check if the platform data indicates we are to protect the boot area.
+ */
+ if (!pdata->boot_area_size_in_bytes) {
+ geometry->boot_area_count = 0;
+ geometry->boot_area_size_in_bytes = 0;
+ return 0;
+ }
+
+ /*
+ * If control arrives here, we are supposed to set up partitions to
+ * protect the boot areas. In this version of the ROM, we support only
+ * one boot area.
+ */
+ geometry->boot_area_count = 1;
+
+ /*
+ * Use the platform's boot area size.
+ */
+ geometry->boot_area_size_in_bytes = pdata->boot_area_size_in_bytes;
+
+ return 0;
+}
+
+/* This structure represents the Boot ROM Helper for this version. */
+struct boot_rom_helper gpmi_nfc_boot_rom_imx28 = {
+ .version = 1,
+ .description = "Single-chip boot area, "
+ "block mark swapping supported",
+ .swap_block_mark = true,
+ .set_geometry = set_geometry,
+};
--
1.7.0.4
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