[PATCH] add bcmring mtd nand driver support
Leo Chen
leochen at broadcom.com
Mon Sep 28 17:11:49 EDT 2009
Add mtd umi driver for bcmring arm arch.
Add header files, register definition files,
add entry in Kconfig and Makefile.
remove superfluous comments from bcm nand driver.
use platform resource.
fix section mismatch warning in the driver.
Signed-off-by: Leo Hao Chen <leochen at broadcom.com>
---
arch/arm/mach-bcmring/arch.c | 10 +
arch/arm/mach-bcmring/include/mach/reg_nand.h | 66 +++
arch/arm/mach-bcmring/include/mach/reg_umi.h | 237 ++++++++++
drivers/mtd/nand/Kconfig | 16 +
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/bcm_umi_bch.c | 213 +++++++++
drivers/mtd/nand/bcm_umi_nand.c | 581 +++++++++++++++++++++++++
drivers/mtd/nand/nand_bcm_umi.c | 149 +++++++
drivers/mtd/nand/nand_bcm_umi.h | 358 +++++++++++++++
9 files changed, 1631 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-bcmring/include/mach/reg_nand.h
create mode 100644 arch/arm/mach-bcmring/include/mach/reg_umi.h
create mode 100644 drivers/mtd/nand/bcm_umi_bch.c
create mode 100644 drivers/mtd/nand/bcm_umi_nand.c
create mode 100644 drivers/mtd/nand/nand_bcm_umi.c
create mode 100644 drivers/mtd/nand/nand_bcm_umi.h
diff --git a/arch/arm/mach-bcmring/arch.c b/arch/arm/mach-bcmring/arch.c
index 0da693b..074dad6 100644
--- a/arch/arm/mach-bcmring/arch.c
+++ b/arch/arm/mach-bcmring/arch.c
@@ -76,9 +76,19 @@ static struct ctl_table bcmring_sysctl_reboot[] = {
{}
};
+static struct resource nand_resource[] = {
+ [0] = {
+ .start = MM_ADDR_IO_NAND,
+ .end = MM_ADDR_IO_NAND + 0x1000 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
static struct platform_device nand_device = {
.name = "bcm-nand",
.id = -1,
+ .resource = nand_resource,
+ .num_resources = ARRAY_SIZE(nand_resource),
};
static struct platform_device *devices[] __initdata = {
diff --git a/arch/arm/mach-bcmring/include/mach/reg_nand.h b/arch/arm/mach-bcmring/include/mach/reg_nand.h
new file mode 100644
index 0000000..387376f
--- /dev/null
+++ b/arch/arm/mach-bcmring/include/mach/reg_nand.h
@@ -0,0 +1,66 @@
+/*****************************************************************************
+* Copyright 2001 - 2008 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.
+*****************************************************************************/
+
+/*
+*
+*****************************************************************************
+*
+* REG_NAND.h
+*
+* PURPOSE:
+*
+* This file contains definitions for the nand registers:
+*
+* NOTES:
+*
+*****************************************************************************/
+
+#if !defined(__ASM_ARCH_REG_NAND_H)
+#define __ASM_ARCH_REG_NAND_H
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/reg.h>
+#include <mach/reg_umi.h>
+
+/* ---- Constants and Types ---------------------------------------------- */
+
+#define HW_NAND_BASE MM_IO_BASE_NAND /* NAND Flash */
+
+/* DMA accesses by the bootstrap need hard nonvirtual addresses */
+#define REG_NAND_CMD __REG16(HW_NAND_BASE + 0)
+#define REG_NAND_ADDR __REG16(HW_NAND_BASE + 4)
+
+#define REG_NAND_PHYS_DATA16 (HW_NAND_BASE + 8)
+#define REG_NAND_PHYS_DATA8 (HW_NAND_BASE + 8)
+#define REG_NAND_DATA16 __REG16(REG_NAND_PHYS_DATA16)
+#define REG_NAND_DATA8 __REG8(REG_NAND_PHYS_DATA8)
+
+/* use appropriate offset to make sure it start at the 1K boundary */
+#define REG_NAND_PHYS_DATA_DMA (HW_NAND_BASE + 0x400)
+#define REG_NAND_DATA_DMA __REG32(REG_NAND_PHYS_DATA_DMA)
+
+/* Linux DMA requires physical address of the data register */
+#define REG_NAND_DATA16_PADDR HW_IO_VIRT_TO_PHYS(REG_NAND_PHYS_DATA16)
+#define REG_NAND_DATA8_PADDR HW_IO_VIRT_TO_PHYS(REG_NAND_PHYS_DATA8)
+#define REG_NAND_DATA_PADDR HW_IO_VIRT_TO_PHYS(REG_NAND_PHYS_DATA_DMA)
+
+#define NAND_BUS_16BIT() (0)
+#define NAND_BUS_8BIT() (!NAND_BUS_16BIT())
+
+/* Register offsets */
+#define REG_NAND_CMD_OFFSET (0)
+#define REG_NAND_ADDR_OFFSET (4)
+#define REG_NAND_DATA8_OFFSET (8)
+
+#endif
diff --git a/arch/arm/mach-bcmring/include/mach/reg_umi.h b/arch/arm/mach-bcmring/include/mach/reg_umi.h
new file mode 100644
index 0000000..06a3554
--- /dev/null
+++ b/arch/arm/mach-bcmring/include/mach/reg_umi.h
@@ -0,0 +1,237 @@
+/*****************************************************************************
+* Copyright 2005 - 2008 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.
+*****************************************************************************/
+
+/*
+*
+*****************************************************************************
+*
+* REG_UMI.h
+*
+* PURPOSE:
+*
+* This file contains definitions for the nand registers:
+*
+* NOTES:
+*
+*****************************************************************************/
+
+#if !defined(__ASM_ARCH_REG_UMI_H)
+#define __ASM_ARCH_REG_UMI_H
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <csp/reg.h>
+#include <mach/csp/mm_io.h>
+
+/* ---- Constants and Types ---------------------------------------------- */
+
+/* Unified Memory Interface Ctrl Register */
+#define HW_UMI_BASE MM_IO_BASE_UMI
+
+/* Flash bank 0 timing and control register */
+#define REG_UMI_FLASH0_TCR __REG32(HW_UMI_BASE + 0x00)
+/* Flash bank 1 timing and control register */
+#define REG_UMI_FLASH1_TCR __REG32(HW_UMI_BASE + 0x04)
+/* Flash bank 2 timing and control register */
+#define REG_UMI_FLASH2_TCR __REG32(HW_UMI_BASE + 0x08)
+/* MMD interface and control register */
+#define REG_UMI_MMD_ICR __REG32(HW_UMI_BASE + 0x0c)
+/* NAND timing and control register */
+#define REG_UMI_NAND_TCR __REG32(HW_UMI_BASE + 0x18)
+/* NAND ready/chip select register */
+#define REG_UMI_NAND_RCSR __REG32(HW_UMI_BASE + 0x1c)
+/* NAND ECC control & status register */
+#define REG_UMI_NAND_ECC_CSR __REG32(HW_UMI_BASE + 0x20)
+/* NAND ECC data register XXB2B1B0 */
+#define REG_UMI_NAND_ECC_DATA __REG32(HW_UMI_BASE + 0x24)
+/* BCH ECC Parameter N */
+#define REG_UMI_BCH_N __REG32(HW_UMI_BASE + 0x40)
+/* BCH ECC Parameter T */
+#define REG_UMI_BCH_K __REG32(HW_UMI_BASE + 0x44)
+/* BCH ECC Parameter K */
+#define REG_UMI_BCH_T __REG32(HW_UMI_BASE + 0x48)
+/* BCH ECC Contro Status */
+#define REG_UMI_BCH_CTRL_STATUS __REG32(HW_UMI_BASE + 0x4C)
+/* BCH WR ECC 31:0 */
+#define REG_UMI_BCH_WR_ECC_0 __REG32(HW_UMI_BASE + 0x50)
+/* BCH WR ECC 63:32 */
+#define REG_UMI_BCH_WR_ECC_1 __REG32(HW_UMI_BASE + 0x54)
+/* BCH WR ECC 95:64 */
+#define REG_UMI_BCH_WR_ECC_2 __REG32(HW_UMI_BASE + 0x58)
+/* BCH WR ECC 127:96 */
+#define REG_UMI_BCH_WR_ECC_3 __REG32(HW_UMI_BASE + 0x5c)
+/* BCH WR ECC 155:128 */
+#define REG_UMI_BCH_WR_ECC_4 __REG32(HW_UMI_BASE + 0x60)
+/* BCH Read Error Location 1,0 */
+#define REG_UMI_BCH_RD_ERR_LOC_1_0 __REG32(HW_UMI_BASE + 0x64)
+/* BCH Read Error Location 3,2 */
+#define REG_UMI_BCH_RD_ERR_LOC_3_2 __REG32(HW_UMI_BASE + 0x68)
+/* BCH Read Error Location 5,4 */
+#define REG_UMI_BCH_RD_ERR_LOC_5_4 __REG32(HW_UMI_BASE + 0x6c)
+/* BCH Read Error Location 7,6 */
+#define REG_UMI_BCH_RD_ERR_LOC_7_6 __REG32(HW_UMI_BASE + 0x70)
+/* BCH Read Error Location 9,8 */
+#define REG_UMI_BCH_RD_ERR_LOC_9_8 __REG32(HW_UMI_BASE + 0x74)
+/* BCH Read Error Location 11,10 */
+#define REG_UMI_BCH_RD_ERR_LOC_B_A __REG32(HW_UMI_BASE + 0x78)
+
+/* REG_UMI_FLASH0/1/2_TCR, REG_UMI_SRAM0/1_TCR bits */
+/* Enable wait pin during burst write or read */
+#define REG_UMI_TCR_WAITEN 0x80000000
+/* Enable mem ctrlr to work iwth ext mem of lower freq than AHB clk */
+#define REG_UMI_TCR_LOWFREQ 0x40000000
+/* 1=synch write, 0=async write */
+#define REG_UMI_TCR_MEMTYPE_SYNCWRITE 0x20000000
+/* 1=synch read, 0=async read */
+#define REG_UMI_TCR_MEMTYPE_SYNCREAD 0x10000000
+/* 1=page mode read, 0=normal mode read */
+#define REG_UMI_TCR_MEMTYPE_PAGEREAD 0x08000000
+/* page size/burst size (wrap only) */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_MASK 0x07000000
+/* 4 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_4 0x00000000
+/* 8 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_8 0x01000000
+/* 16 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_16 0x02000000
+/* 32 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_32 0x03000000
+/* 64 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_64 0x04000000
+/* 128 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_128 0x05000000
+/* 256 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_256 0x06000000
+/* 512 word */
+#define REG_UMI_TCR_MEMTYPE_PGSZ_512 0x07000000
+/* Page read access cycle / Burst write latency (n+2 / n+1) */
+#define REG_UMI_TCR_TPRC_TWLC_MASK 0x00f80000
+/* Bus turnaround cycle (n) */
+#define REG_UMI_TCR_TBTA_MASK 0x00070000
+/* Write pulse width cycle (n+1) */
+#define REG_UMI_TCR_TWP_MASK 0x0000f800
+/* Write recovery cycle (n+1) */
+#define REG_UMI_TCR_TWR_MASK 0x00000600
+/* Write address setup cycle (n+1) */
+#define REG_UMI_TCR_TAS_MASK 0x00000180
+/* Output enable delay cycle (n) */
+#define REG_UMI_TCR_TOE_MASK 0x00000060
+/* Read access cycle / Burst read latency (n+2 / n+1) */
+#define REG_UMI_TCR_TRC_TLC_MASK 0x0000001f
+
+/* REG_UMI_MMD_ICR bits */
+/* Flash write protection pin control */
+#define REG_UMI_MMD_ICR_FLASH_WP 0x8000
+/* Extend hold time for sram0, sram1 csn (39 MHz operation) */
+#define REG_UMI_MMD_ICR_XHCS 0x4000
+/* Enable SDRAM 2 interface control */
+#define REG_UMI_MMD_ICR_SDRAM2EN 0x2000
+/* Enable merge of flash banks 0/1 to 512 MBit bank */
+#define REG_UMI_MMD_ICR_INST512 0x1000
+/* Enable merge of flash banks 1/2 to 512 MBit bank */
+#define REG_UMI_MMD_ICR_DATA512 0x0800
+/* Enable SDRAM interface control */
+#define REG_UMI_MMD_ICR_SDRAMEN 0x0400
+/* Polarity of busy state of Burst Wait Signal */
+#define REG_UMI_MMD_ICR_WAITPOL 0x0200
+/* Enable burst clock stopped when not accessing external burst flash/sram */
+#define REG_UMI_MMD_ICR_BCLKSTOP 0x0100
+/* Enable the peri1_csn to replace flash1_csn in 512 Mb flash mode */
+#define REG_UMI_MMD_ICR_PERI1EN 0x0080
+/* Enable the peri2_csn to replace sdram_csn */
+#define REG_UMI_MMD_ICR_PERI2EN 0x0040
+/* Enable the peri3_csn to replace sdram2_csn */
+#define REG_UMI_MMD_ICR_PERI3EN 0x0020
+/* Enable sram bank1 for H/W controlled MRS */
+#define REG_UMI_MMD_ICR_MRSB1 0x0010
+/* Enable sram bank0 for H/W controlled MRS */
+#define REG_UMI_MMD_ICR_MRSB0 0x0008
+/* Polarity for assert3ed state of H/W controlled MRS */
+#define REG_UMI_MMD_ICR_MRSPOL 0x0004
+/* 0: S/W controllable ZZ/MRS/CRE/P-Mode pin */
+/* 1: H/W controlled ZZ/MRS/CRE/P-Mode, same timing as CS */
+#define REG_UMI_MMD_ICR_MRSMODE 0x0002
+/* MRS state for S/W controlled mode */
+#define REG_UMI_MMD_ICR_MRSSTATE 0x0001
+
+/* REG_UMI_NAND_TCR bits */
+/* Enable software to control CS */
+#define REG_UMI_NAND_TCR_CS_SWCTRL 0x80000000
+/* 16-bit nand wordsize if set */
+#define REG_UMI_NAND_TCR_WORD16 0x40000000
+/* Bus turnaround cycle (n) */
+#define REG_UMI_NAND_TCR_TBTA_MASK 0x00070000
+/* Write pulse width cycle (n+1) */
+#define REG_UMI_NAND_TCR_TWP_MASK 0x0000f800
+/* Write recovery cycle (n+1) */
+#define REG_UMI_NAND_TCR_TWR_MASK 0x00000600
+/* Write address setup cycle (n+1) */
+#define REG_UMI_NAND_TCR_TAS_MASK 0x00000180
+/* Output enable delay cycle (n) */
+#define REG_UMI_NAND_TCR_TOE_MASK 0x00000060
+/* Read access cycle (n+2) */
+#define REG_UMI_NAND_TCR_TRC_TLC_MASK 0x0000001f
+
+/* REG_UMI_NAND_RCSR bits */
+/* Status: Ready=1, Busy=0 */
+#define REG_UMI_NAND_RCSR_RDY 0x02
+/* Keep CS asserted during operation */
+#define REG_UMI_NAND_RCSR_CS_ASSERTED 0x01
+
+/* REG_UMI_NAND_ECC_CSR bits */
+/* Interrupt status - read-only */
+#define REG_UMI_NAND_ECC_CSR_NANDINT 0x80000000
+/* Read: Status of ECC done, Write: clear ECC interrupt */
+#define REG_UMI_NAND_ECC_CSR_ECCINT_RAW 0x00800000
+/* Read: Status of R/B, Write: clear R/B interrupt */
+#define REG_UMI_NAND_ECC_CSR_RBINT_RAW 0x00400000
+/* 1 = Enable ECC Interrupt */
+#define REG_UMI_NAND_ECC_CSR_ECCINT_ENABLE 0x00008000
+/* 1 = Assert interrupt at rising edge of R/B_ */
+#define REG_UMI_NAND_ECC_CSR_RBINT_ENABLE 0x00004000
+/* Calculate ECC by 0=512 bytes, 1=256 bytes */
+#define REG_UMI_NAND_ECC_CSR_256BYTE 0x00000080
+/* Enable ECC in hardware */
+#define REG_UMI_NAND_ECC_CSR_ECC_ENABLE 0x00000001
+
+/* REG_UMI_BCH_CTRL_STATUS bits */
+/* Shift to Indicate Number of correctable errors detected */
+#define REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR_SHIFT 20
+/* Indicate Number of correctable errors detected */
+#define REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR 0x00F00000
+/* Indicate Errors detected during read but uncorrectable */
+#define REG_UMI_BCH_CTRL_STATUS_UNCORR_ERR 0x00080000
+/* Indicate Errors detected during read and are correctable */
+#define REG_UMI_BCH_CTRL_STATUS_CORR_ERR 0x00040000
+/* Flag indicates BCH's ECC status of read process are valid */
+#define REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID 0x00020000
+/* Flag indicates BCH's ECC status of write process are valid */
+#define REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID 0x00010000
+/* Pause ECC calculation */
+#define REG_UMI_BCH_CTRL_STATUS_PAUSE_ECC_DEC 0x00000010
+/* Enable Interrupt */
+#define REG_UMI_BCH_CTRL_STATUS_INT_EN 0x00000004
+/* Enable ECC during read */
+#define REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN 0x00000002
+/* Enable ECC during write */
+#define REG_UMI_BCH_CTRL_STATUS_ECC_WR_EN 0x00000001
+/* Mask for location */
+#define REG_UMI_BCH_ERR_LOC_MASK 0x00001FFF
+/* location within a byte */
+#define REG_UMI_BCH_ERR_LOC_BYTE 0x00000007
+/* location within a word */
+#define REG_UMI_BCH_ERR_LOC_WORD 0x00000018
+/* location within a page (512 byte) */
+#define REG_UMI_BCH_ERR_LOC_PAGE 0x00001FE0
+#define REG_UMI_BCH_ERR_LOC_ADDR(index) (__REG32(HW_UMI_BASE + 0x64 + (index / 2)*4) >> ((index % 2) * 16))
+#endif
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 2fda0b6..34598e9 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -203,6 +203,22 @@ config MTD_NAND_S3C2410_CLKSTOP
when the is NAND chip selected or released, but will save
approximately 5mA of power when there is nothing happening.
+config MTD_NAND_BCM_UMI
+ tristate "NAND Flash support for BCM Reference Boards"
+ depends on ARCH_BCMRING && MTD_NAND
+ help
+ This enables the NAND flash controller on the BCM UMI block.
+
+ No board specfic support is done by this driver, each board
+ must advertise a platform_device for the driver to attach.
+
+config MTD_NAND_BCM_UMI_HWCS
+ bool "BCM UMI NAND Hardware CS"
+ depends on MTD_NAND_BCM_UMI
+ help
+ Enable the use of the BCM UMI block's internal CS using NAND.
+ This should only be used if you know the external NAND CS can toggle.
+
config MTD_NAND_DISKONCHIP
tristate "DiskOnChip 2000, Millennium and Millennium Plus (NAND reimplementation) (EXPERIMENTAL)"
depends on EXPERIMENTAL
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 6950d3d..460a1f3 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -42,5 +42,6 @@ obj-$(CONFIG_MTD_NAND_SOCRATES) += socrates_nand.o
obj-$(CONFIG_MTD_NAND_TXX9NDFMC) += txx9ndfmc.o
obj-$(CONFIG_MTD_NAND_W90P910) += w90p910_nand.o
obj-$(CONFIG_MTD_NAND_NOMADIK) += nomadik_nand.o
+obj-$(CONFIG_MTD_NAND_BCM_UMI) += bcm_umi_nand.o nand_bcm_umi.o
nand-objs := nand_base.o nand_bbt.o
diff --git a/drivers/mtd/nand/bcm_umi_bch.c b/drivers/mtd/nand/bcm_umi_bch.c
new file mode 100644
index 0000000..a930666
--- /dev/null
+++ b/drivers/mtd/nand/bcm_umi_bch.c
@@ -0,0 +1,213 @@
+/*****************************************************************************
+* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include "nand_bcm_umi.h"
+
+/* ---- External Variable Declarations ----------------------------------- */
+/* ---- External Function Prototypes ------------------------------------- */
+/* ---- Public Variables ------------------------------------------------- */
+/* ---- Private Constants and Types -------------------------------------- */
+
+/* ---- Private Function Prototypes -------------------------------------- */
+static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf, int page);
+static void bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf);
+
+/* ---- Private Variables ------------------------------------------------ */
+
+/*
+** nand_hw_eccoob
+** New oob placement block for use with hardware ecc generation.
+*/
+static struct nand_ecclayout nand_hw_eccoob_512 = {
+ /* Reserve 5 for BI indicator */
+ .oobfree = {
+#if (NAND_ECC_NUM_BYTES > 3)
+ {.offset = 0, .length = 2}
+#else
+ {.offset = 0, .length = 5},
+ {.offset = 6, .length = 7}
+#endif
+ }
+};
+
+/*
+** We treat the OOB for a 2K page as if it were 4 512 byte oobs,
+** except the BI is at byte 0.
+*/
+static struct nand_ecclayout nand_hw_eccoob_2048 = {
+ /* Reserve 0 as BI indicator */
+ .oobfree = {
+#if (NAND_ECC_NUM_BYTES > 10)
+ {.offset = 1, .length = 2},
+#elif (NAND_ECC_NUM_BYTES > 7)
+ {.offset = 1, .length = 5},
+ {.offset = 16, .length = 6},
+ {.offset = 32, .length = 6},
+ {.offset = 48, .length = 6}
+#else
+ {.offset = 1, .length = 8},
+ {.offset = 16, .length = 9},
+ {.offset = 32, .length = 9},
+ {.offset = 48, .length = 9}
+#endif
+ }
+};
+
+/* We treat the OOB for a 4K page as if it were 8 512 byte oobs,
+ * except the BI is at byte 0. */
+static struct nand_ecclayout nand_hw_eccoob_4096 = {
+ /* Reserve 0 as BI indicator */
+ .oobfree = {
+#if (NAND_ECC_NUM_BYTES > 10)
+ {.offset = 1, .length = 2},
+ {.offset = 16, .length = 3},
+ {.offset = 32, .length = 3},
+ {.offset = 48, .length = 3},
+ {.offset = 64, .length = 3},
+ {.offset = 80, .length = 3},
+ {.offset = 96, .length = 3},
+ {.offset = 112, .length = 3}
+#else
+ {.offset = 1, .length = 5},
+ {.offset = 16, .length = 6},
+ {.offset = 32, .length = 6},
+ {.offset = 48, .length = 6},
+ {.offset = 64, .length = 6},
+ {.offset = 80, .length = 6},
+ {.offset = 96, .length = 6},
+ {.offset = 112, .length = 6}
+#endif
+ }
+};
+
+/* ---- Private Functions ------------------------------------------------ */
+/* ==== Public Functions ================================================= */
+
+/****************************************************************************
+*
+* bcm_umi_bch_read_page_hwecc - hardware ecc based page read function
+* @mtd: mtd info structure
+* @chip: nand chip info structure
+* @buf: buffer to store read data
+*
+***************************************************************************/
+static int bcm_umi_bch_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t * buf,
+ int page)
+{
+ int sectorIdx = 0;
+ int eccsize = chip->ecc.size;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *datap = buf;
+ uint8_t eccCalc[NAND_ECC_NUM_BYTES];
+ int sectorOobSize = mtd->oobsize / eccsteps;
+ int stat;
+
+ for (sectorIdx = 0; sectorIdx < eccsteps;
+ sectorIdx++, datap += eccsize) {
+ if (sectorIdx > 0) {
+ /* Seek to page location within sector */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, sectorIdx * eccsize,
+ -1);
+ }
+
+ /* Enable hardware ECC before reading the buf */
+ nand_bcm_umi_bch_enable_read_hwecc();
+
+ /* Read in data */
+ bcm_umi_nand_read_buf(mtd, datap, eccsize);
+
+ /* Pause hardware ECC after reading the buf */
+ nand_bcm_umi_bch_pause_read_ecc_calc();
+
+ /* Read the OOB ECC */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
+ mtd->writesize + sectorIdx * sectorOobSize, -1);
+ nand_bcm_umi_bch_read_oobEcc(mtd->writesize, eccCalc,
+ NAND_ECC_NUM_BYTES,
+ chip->oob_poi +
+ sectorIdx * sectorOobSize);
+
+ /* Correct any ECC detected errors */
+ stat =
+ nand_bcm_umi_bch_correct_page(datap, eccCalc,
+ NAND_ECC_NUM_BYTES);
+
+ /* Update Stats */
+ if (stat < 0) {
+#if defined(NAND_BCM_UMI_DEBUG)
+ printk(KERN_WARNING "%s uncorr_err sectorIdx=%d\n",
+ __func__, sectorIdx);
+ printk(KERN_WARNING
+ "%s data %02x %02x %02x %02x "
+ "%02x %02x %02x %02x\n",
+ __func__, datap[0], datap[1], datap[2], datap[3],
+ datap[4], datap[5], datap[6], datap[7]);
+ printk(KERN_WARNING
+ "%s ecc %02x %02x %02x %02x "
+ "%02x %02x %02x %02x %02x %02x "
+ "%02x %02x %02x\n",
+ __func__, eccCalc[0], eccCalc[1], eccCalc[2],
+ eccCalc[3], eccCalc[4], eccCalc[5], eccCalc[6],
+ eccCalc[7], eccCalc[8], eccCalc[9], eccCalc[10],
+ eccCalc[11], eccCalc[12]);
+ BUG();
+#endif
+ mtd->ecc_stats.failed++;
+ } else {
+#if defined(NAND_BCM_UMI_DEBUG)
+ if (stat > 0) {
+ printk(KERN_INFO
+ "%s %d correctable_errors detected\n",
+ __func__, stat);
+ }
+#endif
+ mtd->ecc_stats.corrected += stat;
+ }
+ }
+ return 0;
+}
+
+/****************************************************************************
+*
+* bcm_umi_bch_write_page_hwecc - hardware ecc based page write function
+* @mtd: mtd info structure
+* @chip: nand chip info structure
+* @buf: data buffer
+*
+***************************************************************************/
+static void bcm_umi_bch_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf)
+{
+ int sectorIdx = 0;
+ int eccsize = chip->ecc.size;
+ int eccsteps = chip->ecc.steps;
+ const uint8_t *datap = buf;
+ uint8_t *oobp = chip->oob_poi;
+ int sectorOobSize = mtd->oobsize / eccsteps;
+
+ for (sectorIdx = 0; sectorIdx < eccsteps;
+ sectorIdx++, datap += eccsize, oobp += sectorOobSize) {
+ /* Enable hardware ECC before writing the buf */
+ nand_bcm_umi_bch_enable_write_hwecc();
+ bcm_umi_nand_write_buf(mtd, datap, eccsize);
+ nand_bcm_umi_bch_write_oobEcc(mtd->writesize, oobp,
+ NAND_ECC_NUM_BYTES);
+ }
+
+ bcm_umi_nand_write_buf(mtd, chip->oob_poi, mtd->oobsize);
+}
diff --git a/drivers/mtd/nand/bcm_umi_nand.c b/drivers/mtd/nand/bcm_umi_nand.c
new file mode 100644
index 0000000..087bcd7
--- /dev/null
+++ b/drivers/mtd/nand/bcm_umi_nand.c
@@ -0,0 +1,581 @@
+/*****************************************************************************
+* 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/version.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.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 <asm/system.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";
+
+#ifdef CONFIG_MTD_PARTITIONS
+const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
+#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 uint8_t readbackbuf[NAND_MAX_PAGESIZE];
+static int bcm_umi_nand_verify_buf(struct mtd_info *mtd, const u_char * buf,
+ int len)
+{
+ /*
+ * Try to readback page with ECC correction. This is necessary
+ * for MLC parts which may have permanently stuck bits.
+ */
+ struct nand_chip *chip = mtd->priv;
+ int ret = chip->ecc.read_page(mtd, chip, readbackbuf, 0);
+ if (ret < 0)
+ return -EFAULT;
+ else {
+ if (memcmp(readbackbuf, buf, len) == 0)
+ return 0;
+
+ return -EFAULT;
+ }
+ return 0;
+}
+
+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)
+ return -ENXIO;
+
+ /* map physical adress */
+ bcm_umi_io_base = ioremap(r->start, r->end - r->start + 1);
+
+ if (!bcm_umi_io_base) {
+ printk(KERN_ERR "ioremap to access BCM UMI NAND chip failed\n");
+ kfree(board_mtd);
+ return -EIO;
+ }
+
+ /* 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");
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return -EIO;
+ }
+
+ /* 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->verify_buf = bcm_umi_nand_verify_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)
+ return err;
+#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);
+ if (err) {
+ printk(KERN_ERR "nand_scan failed: %d\n", err);
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return err;
+ }
+
+ /* 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);
+ return -EINVAL;
+ }
+ }
+
+#if NAND_ECC_BCH
+ if (board_mtd->writesize > 512) {
+ if (this->options & NAND_USE_FLASH_BBT)
+ largepage_bbt.options = NAND_BBT_SCAN2NDPAGE;
+ this->badblock_pattern = &largepage_bbt;
+ }
+#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);
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return err;
+ }
+
+ /* Register the partitions */
+ {
+ int nr_partitions;
+ struct mtd_partition *partition_info;
+
+ board_mtd->name = "bcm_umi-nand";
+ nr_partitions =
+ parse_mtd_partitions(board_mtd, part_probes,
+ &partition_info, 0);
+
+ if (nr_partitions <= 0) {
+ printk(KERN_ERR "BCM UMI NAND: Too few partitions - %d\n",
+ nr_partitions);
+ iounmap(bcm_umi_io_base);
+ kfree(board_mtd);
+ return -EIO;
+ }
+ add_mtd_partitions(board_mtd, partition_info, nr_partitions);
+ }
+
+ /* Return happy */
+ return 0;
+}
+
+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 adress */
+ 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,
+};
+
+static int __init nand_init(void)
+{
+ return platform_driver_register(&nand_driver);
+}
+
+static void __exit nand_exit(void)
+{
+ platform_driver_unregister(&nand_driver);
+}
+
+module_init(nand_init);
+module_exit(nand_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Broadcom");
+MODULE_DESCRIPTION("BCM UMI MTD NAND driver");
diff --git a/drivers/mtd/nand/nand_bcm_umi.c b/drivers/mtd/nand/nand_bcm_umi.c
new file mode 100644
index 0000000..46a6bc9
--- /dev/null
+++ b/drivers/mtd/nand/nand_bcm_umi.c
@@ -0,0 +1,149 @@
+/*****************************************************************************
+* Copyright 2004 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <mach/reg_umi.h>
+#include "nand_bcm_umi.h"
+#ifdef BOOT0_BUILD
+#include <uart.h>
+#endif
+
+/* ---- External Variable Declarations ----------------------------------- */
+/* ---- External Function Prototypes ------------------------------------- */
+/* ---- Public Variables ------------------------------------------------- */
+/* ---- Private Constants and Types -------------------------------------- */
+/* ---- Private Function Prototypes -------------------------------------- */
+/* ---- Private Variables ------------------------------------------------ */
+/* ---- Private Functions ------------------------------------------------ */
+
+#if NAND_ECC_BCH
+/****************************************************************************
+* nand_bch_ecc_flip_bit - Routine to flip an errored bit
+*
+* PURPOSE:
+* This is a helper routine that flips the bit (0 -> 1 or 1 -> 0) of the
+* errored bit specified
+*
+* PARAMETERS:
+* datap - Container that holds the 512 byte data
+* errorLocation - Location of the bit that needs to be flipped
+*
+* RETURNS:
+* None
+****************************************************************************/
+static void nand_bcm_umi_bch_ecc_flip_bit(uint8_t *datap, int errorLocation)
+{
+ int locWithinAByte = (errorLocation & REG_UMI_BCH_ERR_LOC_BYTE) >> 0;
+ int locWithinAWord = (errorLocation & REG_UMI_BCH_ERR_LOC_WORD) >> 3;
+ int locWithinAPage = (errorLocation & REG_UMI_BCH_ERR_LOC_PAGE) >> 5;
+
+ uint8_t errorByte = 0;
+ uint8_t byteMask = 1 << locWithinAByte;
+
+ /* BCH uses big endian, need to change the location
+ * bits to little endian */
+ locWithinAWord = 3 - locWithinAWord;
+
+ errorByte = datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord];
+
+#ifdef BOOT0_BUILD
+ puthexs("\nECC Correct Offset: ",
+ locWithinAPage * sizeof(uint32_t) + locWithinAWord);
+ puthexs(" errorByte:", errorByte);
+ puthex8(" Bit: ", locWithinAByte);
+#endif
+
+ if (errorByte & byteMask) {
+ /* bit needs to be cleared */
+ errorByte &= ~byteMask;
+ } else {
+ /* bit needs to be set */
+ errorByte |= byteMask;
+ }
+
+ /* write back the value with the fixed bit */
+ datap[locWithinAPage * sizeof(uint32_t) + locWithinAWord] = errorByte;
+}
+
+/****************************************************************************
+* nand_correct_page_bch - Routine to correct bit errors when reading NAND
+*
+* PURPOSE:
+* This routine reads the BCH registers to determine if there are any bit
+* errors during the read of the last 512 bytes of data + ECC bytes. If
+* errors exists, the routine fixes it.
+*
+* PARAMETERS:
+* datap - Container that holds the 512 byte data
+*
+* RETURNS:
+* 0 or greater = Number of errors corrected
+* (No errors are found or errors have been fixed)
+* -1 = Error(s) cannot be fixed
+****************************************************************************/
+int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
+ int numEccBytes)
+{
+ int numErrors;
+ int errorLocation;
+ int idx;
+ uint32_t regValue;
+
+ /* wait for read ECC to be valid */
+ regValue = nand_bcm_umi_bch_poll_read_ecc_calc();
+
+ /*
+ * read the control status register to determine if there
+ * are error'ed bits
+ * see if errors are correctible
+ */
+ if ((regValue & REG_UMI_BCH_CTRL_STATUS_UNCORR_ERR) > 0) {
+ int i;
+
+ for (i = 0; i < numEccBytes; i++) {
+ if (readEccData[i] != 0xff) {
+ /* errors cannot be fixed, return -1 */
+ return -1;
+ }
+ }
+ /* If ECC is unprogrammed then we can't correct,
+ * assume everything OK */
+ return 0;
+ }
+
+ if ((regValue & REG_UMI_BCH_CTRL_STATUS_CORR_ERR) == 0) {
+ /* no errors */
+ return 0;
+ }
+
+ /*
+ * Fix errored bits by doing the following:
+ * 1. Read the number of errors in the control and status register
+ * 2. Read the error location registers that corresponds to the number
+ * of errors reported
+ * 3. Invert the bit in the data
+ */
+ numErrors = (regValue & REG_UMI_BCH_CTRL_STATUS_NB_CORR_ERROR) >> 20;
+
+ for (idx = 0; idx < numErrors; idx++) {
+ errorLocation =
+ REG_UMI_BCH_ERR_LOC_ADDR(idx) & REG_UMI_BCH_ERR_LOC_MASK;
+
+ /* Flip bit */
+ nand_bcm_umi_bch_ecc_flip_bit(datap, errorLocation);
+ }
+ /* Errors corrected */
+ return numErrors;
+}
+#endif
diff --git a/drivers/mtd/nand/nand_bcm_umi.h b/drivers/mtd/nand/nand_bcm_umi.h
new file mode 100644
index 0000000..7cec2cd
--- /dev/null
+++ b/drivers/mtd/nand/nand_bcm_umi.h
@@ -0,0 +1,358 @@
+/*****************************************************************************
+* Copyright 2003 - 2009 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+#ifndef NAND_BCM_UMI_H
+#define NAND_BCM_UMI_H
+
+/* ---- Include Files ---------------------------------------------------- */
+#include <mach/reg_umi.h>
+#include <mach/reg_nand.h>
+#include <cfg_global.h>
+
+/* ---- Constants and Types ---------------------------------------------- */
+#if (CFG_GLOBAL_CHIP_FAMILY == CFG_GLOBAL_CHIP_FAMILY_BCMRING)
+#define NAND_ECC_BCH (CFG_GLOBAL_CHIP_REV > 0xA0)
+#else
+#define NAND_ECC_BCH 0
+#endif
+
+#define CFG_GLOBAL_NAND_ECC_BCH_NUM_BYTES 13
+
+#if NAND_ECC_BCH
+#ifdef BOOT0_BUILD
+#define NAND_ECC_NUM_BYTES 13
+#else
+#define NAND_ECC_NUM_BYTES CFG_GLOBAL_NAND_ECC_BCH_NUM_BYTES
+#endif
+#else
+#define NAND_ECC_NUM_BYTES 3
+#endif
+
+#define NAND_DATA_ACCESS_SIZE 512
+
+/* ---- Variable Externs ------------------------------------------ */
+/* ---- Function Prototypes --------------------------------------- */
+int nand_bcm_umi_bch_correct_page(uint8_t *datap, uint8_t *readEccData,
+ int numEccBytes);
+
+/* Check in device is ready */
+static inline int nand_bcm_umi_dev_ready(void)
+{
+ return REG_UMI_NAND_RCSR & REG_UMI_NAND_RCSR_RDY;
+}
+
+/* Wait until device is ready */
+static inline void nand_bcm_umi_wait_till_ready(void)
+{
+ while (nand_bcm_umi_dev_ready() == 0)
+ ;
+}
+
+/* Enable Hamming ECC */
+static inline void nand_bcm_umi_hamming_enable_hwecc(void)
+{
+ /* disable and reset ECC, 512 byte page */
+ REG_UMI_NAND_ECC_CSR &= ~(REG_UMI_NAND_ECC_CSR_ECC_ENABLE |
+ REG_UMI_NAND_ECC_CSR_256BYTE);
+ /* enable ECC */
+ REG_UMI_NAND_ECC_CSR |= REG_UMI_NAND_ECC_CSR_ECC_ENABLE;
+}
+
+#if NAND_ECC_BCH
+/* BCH ECC specifics */
+#define ECC_BITS_PER_CORRECTABLE_BIT 13
+
+/* Enable BCH Read ECC */
+static inline void nand_bcm_umi_bch_enable_read_hwecc(void)
+{
+ /* disable and reset ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID;
+ /* Turn on ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN;
+}
+
+/* Enable BCH Write ECC */
+static inline void nand_bcm_umi_bch_enable_write_hwecc(void)
+{
+ /* disable and reset ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID;
+ /* Turn on ECC */
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_WR_EN;
+}
+
+/* Config number of BCH ECC bytes */
+static inline void nand_bcm_umi_bch_config_ecc(uint8_t numEccBytes)
+{
+ uint32_t nValue;
+ uint32_t tValue;
+ uint32_t kValue;
+ uint32_t numBits = numEccBytes * 8;
+
+ /* disable and reset ECC */
+ REG_UMI_BCH_CTRL_STATUS =
+ REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID |
+ REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID;
+
+ /* Every correctible bit requires 13 ECC bits */
+ tValue = (uint32_t) (numBits / ECC_BITS_PER_CORRECTABLE_BIT);
+
+ /* Total data in number of bits for generating and computing BCH ECC */
+ nValue = (NAND_DATA_ACCESS_SIZE + numEccBytes) * 8;
+
+ /* K parameter is used internally. K = N - (T * 13) */
+ kValue = nValue - (tValue * ECC_BITS_PER_CORRECTABLE_BIT);
+
+ /* Write the settings */
+ REG_UMI_BCH_N = nValue;
+ REG_UMI_BCH_T = tValue;
+ REG_UMI_BCH_K = kValue;
+}
+
+/* Pause during ECC read calculation to skip bytes in OOB */
+static inline void nand_bcm_umi_bch_pause_read_ecc_calc(void)
+{
+ REG_UMI_BCH_CTRL_STATUS =
+ REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN |
+ REG_UMI_BCH_CTRL_STATUS_PAUSE_ECC_DEC;
+}
+
+/* Resume during ECC read calculation after skipping bytes in OOB */
+static inline void nand_bcm_umi_bch_resume_read_ecc_calc(void)
+{
+ REG_UMI_BCH_CTRL_STATUS = REG_UMI_BCH_CTRL_STATUS_ECC_RD_EN;
+}
+
+/* Poll read ECC calc to check when hardware completes */
+static inline uint32_t nand_bcm_umi_bch_poll_read_ecc_calc(void)
+{
+ uint32_t regVal;
+
+ do {
+ /* wait for ECC to be valid */
+ regVal = REG_UMI_BCH_CTRL_STATUS;
+ } while ((regVal & REG_UMI_BCH_CTRL_STATUS_RD_ECC_VALID) == 0);
+
+ return regVal;
+}
+
+/* Poll write ECC calc to check when hardware completes */
+static inline void nand_bcm_umi_bch_poll_write_ecc_calc(void)
+{
+ /* wait for ECC to be valid */
+ while ((REG_UMI_BCH_CTRL_STATUS & REG_UMI_BCH_CTRL_STATUS_WR_ECC_VALID)
+ == 0)
+ ;
+}
+
+/* Read the OOB and ECC, for kernel write OOB to a buffer */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+static inline void nand_bcm_umi_bch_read_oobEcc(uint32_t pageSize,
+ uint8_t *eccCalc, int numEccBytes, uint8_t *oobp)
+#else
+static inline void nand_bcm_umi_bch_read_oobEcc(uint32_t pageSize,
+ uint8_t *eccCalc, int numEccBytes)
+#endif
+{
+ int eccPos = 0;
+ int numToRead = 16; /* There are 16 bytes per sector in the OOB */
+
+ /* ECC is already paused when this function is called */
+
+ if (pageSize == NAND_DATA_ACCESS_SIZE) {
+ while (numToRead > numEccBytes) {
+ /* skip free oob region */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+
+ /* read ECC bytes before BI */
+ nand_bcm_umi_bch_resume_read_ecc_calc();
+
+ while (numToRead > 11) {
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp = REG_NAND_DATA8;
+ eccCalc[eccPos++] = *oobp;
+ oobp++;
+#else
+ eccCalc[eccPos++] = REG_NAND_DATA8;
+#endif
+ }
+
+ nand_bcm_umi_bch_pause_read_ecc_calc();
+
+ if (numToRead == 11) {
+ /* read BI */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+
+ /* read ECC bytes */
+ nand_bcm_umi_bch_resume_read_ecc_calc();
+ while (numToRead) {
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp = REG_NAND_DATA8;
+ eccCalc[eccPos++] = *oobp;
+ oobp++;
+#else
+ eccCalc[eccPos++] = REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+ } else {
+ /* skip BI */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+
+ while (numToRead > numEccBytes) {
+ /* skip free oob region */
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp++ = REG_NAND_DATA8;
+#else
+ REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+
+ /* read ECC bytes */
+ nand_bcm_umi_bch_resume_read_ecc_calc();
+ while (numToRead) {
+#if defined(__KERNEL__) && !defined(STANDALONE)
+ *oobp = REG_NAND_DATA8;
+ eccCalc[eccPos++] = *oobp;
+ oobp++;
+#else
+ eccCalc[eccPos++] = REG_NAND_DATA8;
+#endif
+ numToRead--;
+ }
+ }
+}
+
+/* Helper function to write ECC */
+static inline void NAND_BCM_UMI_ECC_WRITE(int numEccBytes, int eccBytePos,
+ uint8_t *oobp, uint8_t eccVal)
+{
+ if (eccBytePos <= numEccBytes)
+ *oobp = eccVal;
+}
+
+/* Write OOB with ECC */
+static inline void nand_bcm_umi_bch_write_oobEcc(uint32_t pageSize,
+ uint8_t *oobp, int numEccBytes)
+{
+ uint32_t eccVal = 0xffffffff;
+
+ /* wait for write ECC to be valid */
+ nand_bcm_umi_bch_poll_write_ecc_calc();
+
+ /*
+ ** Get the hardware ecc from the 32-bit result registers.
+ ** Read after 512 byte accesses. Format B3B2B1B0
+ ** where B3 = ecc3, etc.
+ */
+
+ if (pageSize == NAND_DATA_ACCESS_SIZE) {
+ /* Now fill in the ECC bytes */
+ if (numEccBytes >= 13)
+ eccVal = REG_UMI_BCH_WR_ECC_3;
+
+ /* Usually we skip CM in oob[0,1] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 15, &oobp[0],
+ (eccVal >> 16) & 0xff);
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 14, &oobp[1],
+ (eccVal >> 8) & 0xff);
+
+ /* Write ECC in oob[2,3,4] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 13, &oobp[2],
+ eccVal & 0xff); /* ECC 12 */
+
+ if (numEccBytes >= 9)
+ eccVal = REG_UMI_BCH_WR_ECC_2;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 12, &oobp[3],
+ (eccVal >> 24) & 0xff); /* ECC11 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 11, &oobp[4],
+ (eccVal >> 16) & 0xff); /* ECC10 */
+
+ /* Always Skip BI in oob[5] */
+ } else {
+ /* Always Skip BI in oob[0] */
+
+ /* Now fill in the ECC bytes */
+ if (numEccBytes >= 13)
+ eccVal = REG_UMI_BCH_WR_ECC_3;
+
+ /* Usually skip CM in oob[1,2] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 15, &oobp[1],
+ (eccVal >> 16) & 0xff);
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 14, &oobp[2],
+ (eccVal >> 8) & 0xff);
+
+ /* Write ECC in oob[3-15] */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 13, &oobp[3],
+ eccVal & 0xff); /* ECC12 */
+
+ if (numEccBytes >= 9)
+ eccVal = REG_UMI_BCH_WR_ECC_2;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 12, &oobp[4],
+ (eccVal >> 24) & 0xff); /* ECC11 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 11, &oobp[5],
+ (eccVal >> 16) & 0xff); /* ECC10 */
+ }
+
+ /* Fill in the remainder of ECC locations */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 10, &oobp[6],
+ (eccVal >> 8) & 0xff); /* ECC9 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 9, &oobp[7],
+ eccVal & 0xff); /* ECC8 */
+
+ if (numEccBytes >= 5)
+ eccVal = REG_UMI_BCH_WR_ECC_1;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 8, &oobp[8],
+ (eccVal >> 24) & 0xff); /* ECC7 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 7, &oobp[9],
+ (eccVal >> 16) & 0xff); /* ECC6 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 6, &oobp[10],
+ (eccVal >> 8) & 0xff); /* ECC5 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 5, &oobp[11],
+ eccVal & 0xff); /* ECC4 */
+
+ if (numEccBytes >= 1)
+ eccVal = REG_UMI_BCH_WR_ECC_0;
+
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 4, &oobp[12],
+ (eccVal >> 24) & 0xff); /* ECC3 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 3, &oobp[13],
+ (eccVal >> 16) & 0xff); /* ECC2 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 2, &oobp[14],
+ (eccVal >> 8) & 0xff); /* ECC1 */
+ NAND_BCM_UMI_ECC_WRITE(numEccBytes, 1, &oobp[15],
+ eccVal & 0xff); /* ECC0 */
+}
+#endif
+
+#endif /* NAND_BCM_UMI_H */
--
1.6.0.6
--
Leo Hao Chen
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