diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-4.1/420-mtd-bcm5301x_nand.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.1/420-mtd-bcm5301x_nand.patch | 1608 |
1 files changed, 0 insertions, 1608 deletions
diff --git a/target/linux/bcm53xx/patches-4.1/420-mtd-bcm5301x_nand.patch b/target/linux/bcm53xx/patches-4.1/420-mtd-bcm5301x_nand.patch deleted file mode 100644 index 07cde2114a..0000000000 --- a/target/linux/bcm53xx/patches-4.1/420-mtd-bcm5301x_nand.patch +++ /dev/null @@ -1,1608 +0,0 @@ ---- a/drivers/mtd/nand/Kconfig -+++ b/drivers/mtd/nand/Kconfig -@@ -530,4 +530,10 @@ config MTD_NAND_HISI504 - help - Enables support for NAND controller on Hisilicon SoC Hip04. - -+config MTD_NAND_BCM -+ tristate "Support for NAND on some Broadcom SoC" -+ help -+ This driver is currently used for the NAND flash controller on the -+ Broadcom BCM5301X (NorthStar) SoCs. -+ - endif # MTD_NAND ---- a/drivers/mtd/nand/Makefile -+++ b/drivers/mtd/nand/Makefile -@@ -52,5 +52,6 @@ obj-$(CONFIG_MTD_NAND_XWAY) += xway_nan - obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/ - obj-$(CONFIG_MTD_NAND_SUNXI) += sunxi_nand.o - obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o -+obj-$(CONFIG_MTD_NAND_BCM) += bcm_nand.o - - nand-objs := nand_base.o nand_bbt.o nand_timings.o ---- /dev/null -+++ b/drivers/mtd/nand/bcm_nand.c -@@ -0,0 +1,1583 @@ -+/* -+ * Nortstar NAND controller driver -+ * -+ * (c) Broadcom, Inc. 2012 All Rights Reserved. -+ * Copyright 2014 Hauke Mehrtens <hauke@hauke-m.de> -+ * -+ * Licensed under the GNU/GPL. See COPYING for details. -+ * -+ * This module interfaces the NAND controller and hardware ECC capabilities -+ * tp the generic NAND chip support in the NAND library. -+ * -+ * Notes: -+ * This driver depends on generic NAND driver, but works at the -+ * page level for operations. -+ * -+ * When a page is written, the ECC calculated also protects the OOB -+ * bytes not taken by ECC, and so the OOB must be combined with any -+ * OOB data that preceded the page-write operation in order for the -+ * ECC to be calculated correctly. -+ * Also, when the page is erased, but OOB data is not, HW ECC will -+ * indicate an error, because it checks OOB too, which calls for some -+ * help from the software in this driver. -+ * -+ * TBD: -+ * Block locking/unlocking support, OTP support -+ */ -+ -+ -+#include <linux/kernel.h> -+#include <linux/module.h> -+#include <linux/io.h> -+#include <linux/ioport.h> -+#include <linux/interrupt.h> -+#include <linux/delay.h> -+#include <linux/err.h> -+#include <linux/slab.h> -+#include <linux/bcma/bcma.h> -+#include <linux/of_irq.h> -+ -+#include <linux/mtd/mtd.h> -+#include <linux/mtd/nand.h> -+#include <linux/mtd/partitions.h> -+ -+#define NANDC_MAX_CHIPS 2 /* Only 2 CSn supported in NorthStar */ -+ -+/* -+ * Driver private control structure -+ */ -+struct bcmnand_ctrl { -+ struct mtd_info mtd; -+ struct nand_chip nand; -+ struct bcma_device *core; -+ -+ struct completion op_completion; -+ -+ struct nand_ecclayout ecclayout; -+ int cmd_ret; /* saved error code */ -+ unsigned char oob_index; -+ unsigned char id_byte_index; -+ unsigned char chip_num; -+ unsigned char last_cmd; -+ unsigned char ecc_level; -+ unsigned char sector_size_shift; -+ unsigned char sec_per_page_shift; -+}; -+ -+ -+/* -+ * IRQ numbers - offset from first irq in nandc_irq resource -+ */ -+#define NANDC_IRQ_RD_MISS 0 -+#define NANDC_IRQ_ERASE_COMPLETE 1 -+#define NANDC_IRQ_COPYBACK_COMPLETE 2 -+#define NANDC_IRQ_PROGRAM_COMPLETE 3 -+#define NANDC_IRQ_CONTROLLER_RDY 4 -+#define NANDC_IRQ_RDBSY_RDY 5 -+#define NANDC_IRQ_ECC_UNCORRECTABLE 6 -+#define NANDC_IRQ_ECC_CORRECTABLE 7 -+#define NANDC_IRQ_NUM 8 -+ -+struct bcmnand_reg_field { -+ unsigned int reg; -+ unsigned int pos; -+ unsigned int width; -+}; -+ -+/* -+ * REGISTERS -+ * -+ * Individual bit-fields aof registers are specificed here -+ * for clarity, and the rest of the code will access each field -+ * as if it was its own register. -+ * -+ * Following registers are off <reg_base>: -+ */ -+#define REG_BIT_FIELD(r, p, w) ((struct bcmnand_reg_field){(r), (p), (w)}) -+ -+#define NANDC_8KB_PAGE_SUPPORT REG_BIT_FIELD(0x0, 31, 1) -+#define NANDC_REV_MAJOR REG_BIT_FIELD(0x0, 8, 8) -+#define NANDC_REV_MINOR REG_BIT_FIELD(0x0, 0, 8) -+ -+#define NANDC_CMD_START_OPCODE REG_BIT_FIELD(0x4, 24, 5) -+ -+#define NANDC_CMD_CS_SEL REG_BIT_FIELD(0x8, 16, 3) -+#define NANDC_CMD_EXT_ADDR REG_BIT_FIELD(0x8, 0, 16) -+ -+#define NANDC_CMD_ADDRESS REG_BIT_FIELD(0xc, 0, 32) -+#define NANDC_CMD_END_ADDRESS REG_BIT_FIELD(0x10, 0, 32) -+ -+#define NANDC_INT_STATUS REG_BIT_FIELD(0x14, 0, 32) -+#define NANDC_INT_STAT_CTLR_RDY REG_BIT_FIELD(0x14, 31, 1) -+#define NANDC_INT_STAT_FLASH_RDY REG_BIT_FIELD(0x14, 30, 1) -+#define NANDC_INT_STAT_CACHE_VALID REG_BIT_FIELD(0x14, 29, 1) -+#define NANDC_INT_STAT_SPARE_VALID REG_BIT_FIELD(0x14, 28, 1) -+#define NANDC_INT_STAT_ERASED REG_BIT_FIELD(0x14, 27, 1) -+#define NANDC_INT_STAT_PLANE_RDY REG_BIT_FIELD(0x14, 26, 1) -+#define NANDC_INT_STAT_FLASH_STATUS REG_BIT_FIELD(0x14, 0, 8) -+ -+#define NANDC_CS_LOCK REG_BIT_FIELD(0x18, 31, 1) -+#define NANDC_CS_AUTO_CONFIG REG_BIT_FIELD(0x18, 30, 1) -+#define NANDC_CS_NAND_WP REG_BIT_FIELD(0x18, 29, 1) -+#define NANDC_CS_BLK0_WP REG_BIT_FIELD(0x18, 28, 1) -+#define NANDC_CS_SW_USING_CS(n) REG_BIT_FIELD(0x18, 8+(n), 1) -+#define NANDC_CS_MAP_SEL_CS(n) REG_BIT_FIELD(0x18, 0+(n), 1) -+ -+#define NANDC_XOR_ADDR_BLK0_ONLY REG_BIT_FIELD(0x1c, 31, 1) -+#define NANDC_XOR_ADDR_CS(n) REG_BIT_FIELD(0x1c, 0+(n), 1) -+ -+#define NANDC_LL_OP_RET_IDLE REG_BIT_FIELD(0x20, 31, 1) -+#define NANDC_LL_OP_CLE REG_BIT_FIELD(0x20, 19, 1) -+#define NANDC_LL_OP_ALE REG_BIT_FIELD(0x20, 18, 1) -+#define NANDC_LL_OP_WE REG_BIT_FIELD(0x20, 17, 1) -+#define NANDC_LL_OP_RE REG_BIT_FIELD(0x20, 16, 1) -+#define NANDC_LL_OP_DATA REG_BIT_FIELD(0x20, 0, 16) -+ -+#define NANDC_MPLANE_ADDR_EXT REG_BIT_FIELD(0x24, 0, 16) -+#define NANDC_MPLANE_ADDR REG_BIT_FIELD(0x28, 0, 32) -+ -+#define NANDC_ACC_CTRL_CS(n) REG_BIT_FIELD(0x50+((n)<<4), 0, 32) -+#define NANDC_ACC_CTRL_RD_ECC(n) REG_BIT_FIELD(0x50+((n)<<4), 31, 1) -+#define NANDC_ACC_CTRL_WR_ECC(n) REG_BIT_FIELD(0x50+((n)<<4), 30, 1) -+#define NANDC_ACC_CTRL_CE_CARE(n) REG_BIT_FIELD(0x50+((n)<<4), 29, 1) -+#define NANDC_ACC_CTRL_PGM_RDIN(n) REG_BIT_FIELD(0x50+((n)<<4), 28, 1) -+#define NANDC_ACC_CTRL_ERA_ECC_ERR(n) REG_BIT_FIELD(0x50+((n)<<4), 27, 1) -+#define NANDC_ACC_CTRL_PGM_PARTIAL(n) REG_BIT_FIELD(0x50+((n)<<4), 26, 1) -+#define NANDC_ACC_CTRL_WR_PREEMPT(n) REG_BIT_FIELD(0x50+((n)<<4), 25, 1) -+#define NANDC_ACC_CTRL_PG_HIT(n) REG_BIT_FIELD(0x50+((n)<<4), 24, 1) -+#define NANDC_ACC_CTRL_PREFETCH(n) REG_BIT_FIELD(0x50+((n)<<4), 23, 1) -+#define NANDC_ACC_CTRL_CACHE_MODE(n) REG_BIT_FIELD(0x50+((n)<<4), 22, 1) -+#define NANDC_ACC_CTRL_CACHE_LASTPG(n) REG_BIT_FIELD(0x50+((n)<<4), 21, 1) -+#define NANDC_ACC_CTRL_ECC_LEVEL(n) REG_BIT_FIELD(0x50+((n)<<4), 16, 5) -+#define NANDC_ACC_CTRL_SECTOR_1K(n) REG_BIT_FIELD(0x50+((n)<<4), 7, 1) -+#define NANDC_ACC_CTRL_SPARE_SIZE(n) REG_BIT_FIELD(0x50+((n)<<4), 0, 7) -+ -+#define NANDC_CONFIG_CS(n) REG_BIT_FIELD(0x54+((n)<<4), 0, 32) -+#define NANDC_CONFIG_LOCK(n) REG_BIT_FIELD(0x54+((n)<<4), 31, 1) -+#define NANDC_CONFIG_BLK_SIZE(n) REG_BIT_FIELD(0x54+((n)<<4), 28, 3) -+#define NANDC_CONFIG_CHIP_SIZE(n) REG_BIT_FIELD(0x54+((n)<<4), 24, 4) -+#define NANDC_CONFIG_CHIP_WIDTH(n) REG_BIT_FIELD(0x54+((n)<<4), 23, 1) -+#define NANDC_CONFIG_PAGE_SIZE(n) REG_BIT_FIELD(0x54+((n)<<4), 20, 2) -+#define NANDC_CONFIG_FUL_ADDR_BYTES(n) REG_BIT_FIELD(0x54+((n)<<4), 16, 3) -+#define NANDC_CONFIG_COL_ADDR_BYTES(n) REG_BIT_FIELD(0x54+((n)<<4), 12, 3) -+#define NANDC_CONFIG_BLK_ADDR_BYTES(n) REG_BIT_FIELD(0x54+((n)<<4), 8, 3) -+ -+#define NANDC_TIMING_1_CS(n) REG_BIT_FIELD(0x58+((n)<<4), 0, 32) -+#define NANDC_TIMING_2_CS(n) REG_BIT_FIELD(0x5c+((n)<<4), 0, 32) -+ /* Individual bits for Timing registers - TBD */ -+ -+#define NANDC_CORR_STAT_THRESH_CS(n) REG_BIT_FIELD(0xc0, 6*(n), 6) -+ -+#define NANDC_BLK_WP_END_ADDR REG_BIT_FIELD(0xc8, 0, 32) -+ -+#define NANDC_MPLANE_ERASE_CYC2_OPCODE REG_BIT_FIELD(0xcc, 24, 8) -+#define NANDC_MPLANE_READ_STAT_OPCODE REG_BIT_FIELD(0xcc, 16, 8) -+#define NANDC_MPLANE_PROG_ODD_OPCODE REG_BIT_FIELD(0xcc, 8, 8) -+#define NANDC_MPLANE_PROG_TRL_OPCODE REG_BIT_FIELD(0xcc, 0, 8) -+ -+#define NANDC_MPLANE_PGCACHE_TRL_OPCODE REG_BIT_FIELD(0xd0, 24, 8) -+#define NANDC_MPLANE_READ_STAT2_OPCODE REG_BIT_FIELD(0xd0, 16, 8) -+#define NANDC_MPLANE_READ_EVEN_OPCODE REG_BIT_FIELD(0xd0, 8, 8) -+#define NANDC_MPLANE_READ_ODD__OPCODE REG_BIT_FIELD(0xd0, 0, 8) -+ -+#define NANDC_MPLANE_CTRL_ERASE_CYC2_EN REG_BIT_FIELD(0xd4, 31, 1) -+#define NANDC_MPLANE_CTRL_RD_ADDR_SIZE REG_BIT_FIELD(0xd4, 30, 1) -+#define NANDC_MPLANE_CTRL_RD_CYC_ADDR REG_BIT_FIELD(0xd4, 29, 1) -+#define NANDC_MPLANE_CTRL_RD_COL_ADDR REG_BIT_FIELD(0xd4, 28, 1) -+ -+#define NANDC_UNCORR_ERR_COUNT REG_BIT_FIELD(0xfc, 0, 32) -+ -+#define NANDC_CORR_ERR_COUNT REG_BIT_FIELD(0x100, 0, 32) -+ -+#define NANDC_READ_CORR_BIT_COUNT REG_BIT_FIELD(0x104, 0, 32) -+ -+#define NANDC_BLOCK_LOCK_STATUS REG_BIT_FIELD(0x108, 0, 8) -+ -+#define NANDC_ECC_CORR_ADDR_CS REG_BIT_FIELD(0x10c, 16, 3) -+#define NANDC_ECC_CORR_ADDR_EXT REG_BIT_FIELD(0x10c, 0, 16) -+ -+#define NANDC_ECC_CORR_ADDR REG_BIT_FIELD(0x110, 0, 32) -+ -+#define NANDC_ECC_UNC_ADDR_CS REG_BIT_FIELD(0x114, 16, 3) -+#define NANDC_ECC_UNC_ADDR_EXT REG_BIT_FIELD(0x114, 0, 16) -+ -+#define NANDC_ECC_UNC_ADDR REG_BIT_FIELD(0x118, 0, 32) -+ -+#define NANDC_READ_ADDR_CS REG_BIT_FIELD(0x11c, 16, 3) -+#define NANDC_READ_ADDR_EXT REG_BIT_FIELD(0x11c, 0, 16) -+#define NANDC_READ_ADDR REG_BIT_FIELD(0x120, 0, 32) -+ -+#define NANDC_PROG_ADDR_CS REG_BIT_FIELD(0x124, 16, 3) -+#define NANDC_PROG_ADDR_EXT REG_BIT_FIELD(0x124, 0, 16) -+#define NANDC_PROG_ADDR REG_BIT_FIELD(0x128, 0, 32) -+ -+#define NANDC_CPYBK_ADDR_CS REG_BIT_FIELD(0x12c, 16, 3) -+#define NANDC_CPYBK_ADDR_EXT REG_BIT_FIELD(0x12c, 0, 16) -+#define NANDC_CPYBK_ADDR REG_BIT_FIELD(0x130, 0, 32) -+ -+#define NANDC_ERASE_ADDR_CS REG_BIT_FIELD(0x134, 16, 3) -+#define NANDC_ERASE_ADDR_EXT REG_BIT_FIELD(0x134, 0, 16) -+#define NANDC_ERASE_ADDR REG_BIT_FIELD(0x138, 0, 32) -+ -+#define NANDC_INV_READ_ADDR_CS REG_BIT_FIELD(0x13c, 16, 3) -+#define NANDC_INV_READ_ADDR_EXT REG_BIT_FIELD(0x13c, 0, 16) -+#define NANDC_INV_READ_ADDR REG_BIT_FIELD(0x140, 0, 32) -+ -+#define NANDC_INIT_STAT REG_BIT_FIELD(0x144, 0, 32) -+#define NANDC_INIT_ONFI_DONE REG_BIT_FIELD(0x144, 31, 1) -+#define NANDC_INIT_DEVID_DONE REG_BIT_FIELD(0x144, 30, 1) -+#define NANDC_INIT_SUCCESS REG_BIT_FIELD(0x144, 29, 1) -+#define NANDC_INIT_FAIL REG_BIT_FIELD(0x144, 28, 1) -+#define NANDC_INIT_BLANK REG_BIT_FIELD(0x144, 27, 1) -+#define NANDC_INIT_TIMEOUT REG_BIT_FIELD(0x144, 26, 1) -+#define NANDC_INIT_UNC_ERROR REG_BIT_FIELD(0x144, 25, 1) -+#define NANDC_INIT_CORR_ERROR REG_BIT_FIELD(0x144, 24, 1) -+#define NANDC_INIT_PARAM_RDY REG_BIT_FIELD(0x144, 23, 1) -+#define NANDC_INIT_AUTH_FAIL REG_BIT_FIELD(0x144, 22, 1) -+ -+#define NANDC_ONFI_STAT REG_BIT_FIELD(0x148, 0, 32) -+#define NANDC_ONFI_DEBUG REG_BIT_FIELD(0x148, 28, 4) -+#define NANDC_ONFI_PRESENT REG_BIT_FIELD(0x148, 27, 1) -+#define NANDC_ONFI_BADID_PG2 REG_BIT_FIELD(0x148, 5, 1) -+#define NANDC_ONFI_BADID_PG1 REG_BIT_FIELD(0x148, 4, 1) -+#define NANDC_ONFI_BADID_PG0 REG_BIT_FIELD(0x148, 3, 1) -+#define NANDC_ONFI_BADCRC_PG2 REG_BIT_FIELD(0x148, 2, 1) -+#define NANDC_ONFI_BADCRC_PG1 REG_BIT_FIELD(0x148, 1, 1) -+#define NANDC_ONFI_BADCRC_PG0 REG_BIT_FIELD(0x148, 0, 1) -+ -+#define NANDC_ONFI_DEBUG_DATA REG_BIT_FIELD(0x14c, 0, 32) -+ -+#define NANDC_SEMAPHORE REG_BIT_FIELD(0x150, 0, 8) -+ -+#define NANDC_DEVID_BYTE(b) REG_BIT_FIELD(0x194+((b)&0x4), \ -+ 24-(((b)&3)<<3), 8) -+ -+#define NANDC_LL_RDDATA REG_BIT_FIELD(0x19c, 0, 16) -+ -+#define NANDC_INT_N_REG(n) REG_BIT_FIELD(0xf00|((n)<<2), 0, 1) -+#define NANDC_INT_DIREC_READ_MISS REG_BIT_FIELD(0xf00, 0, 1) -+#define NANDC_INT_ERASE_DONE REG_BIT_FIELD(0xf04, 0, 1) -+#define NANDC_INT_CPYBK_DONE REG_BIT_FIELD(0xf08, 0, 1) -+#define NANDC_INT_PROGRAM_DONE REG_BIT_FIELD(0xf0c, 0, 1) -+#define NANDC_INT_CONTROLLER_RDY REG_BIT_FIELD(0xf10, 0, 1) -+#define NANDC_INT_RDBSY_RDY REG_BIT_FIELD(0xf14, 0, 1) -+#define NANDC_INT_ECC_UNCORRECTABLE REG_BIT_FIELD(0xf18, 0, 1) -+#define NANDC_INT_ECC_CORRECTABLE REG_BIT_FIELD(0xf1c, 0, 1) -+ -+/* -+ * Following registers are treated as contigous IO memory, offset is from -+ * <reg_base>, and the data is in big-endian byte order -+ */ -+#define NANDC_SPARE_AREA_READ_OFF 0x200 -+#define NANDC_SPARE_AREA_WRITE_OFF 0x280 -+#define NANDC_CACHE_OFF 0x400 -+#define NANDC_CACHE_SIZE (128*4) -+ -+struct bcmnand_areg_field { -+ unsigned int reg; -+ unsigned int pos; -+ unsigned int width; -+}; -+ -+/* -+ * Following are IDM (a.k.a. Slave Wrapper) registers are off <idm_base>: -+ */ -+#define IDMREG_BIT_FIELD(r, p, w) ((struct bcmnand_areg_field){(r), (p), (w)}) -+ -+#define NANDC_IDM_AXI_BIG_ENDIAN IDMREG_BIT_FIELD(0x408, 28, 1) -+#define NANDC_IDM_APB_LITTLE_ENDIAN IDMREG_BIT_FIELD(0x408, 24, 1) -+#define NANDC_IDM_TM IDMREG_BIT_FIELD(0x408, 16, 5) -+#define NANDC_IDM_IRQ_CORRECABLE_EN IDMREG_BIT_FIELD(0x408, 9, 1) -+#define NANDC_IDM_IRQ_UNCORRECABLE_EN IDMREG_BIT_FIELD(0x408, 8, 1) -+#define NANDC_IDM_IRQ_RDYBSY_RDY_EN IDMREG_BIT_FIELD(0x408, 7, 1) -+#define NANDC_IDM_IRQ_CONTROLLER_RDY_EN IDMREG_BIT_FIELD(0x408, 6, 1) -+#define NANDC_IDM_IRQ_PRPOGRAM_COMP_EN IDMREG_BIT_FIELD(0x408, 5, 1) -+#define NANDC_IDM_IRQ_COPYBK_COMP_EN IDMREG_BIT_FIELD(0x408, 4, 1) -+#define NANDC_IDM_IRQ_ERASE_COMP_EN IDMREG_BIT_FIELD(0x408, 3, 1) -+#define NANDC_IDM_IRQ_READ_MISS_EN IDMREG_BIT_FIELD(0x408, 2, 1) -+#define NANDC_IDM_IRQ_N_EN(n) IDMREG_BIT_FIELD(0x408, 2+(n), 1) -+ -+#define NANDC_IDM_CLOCK_EN IDMREG_BIT_FIELD(0x408, 0, 1) -+ -+#define NANDC_IDM_IO_ECC_CORR IDMREG_BIT_FIELD(0x500, 3, 1) -+#define NANDC_IDM_IO_ECC_UNCORR IDMREG_BIT_FIELD(0x500, 2, 1) -+#define NANDC_IDM_IO_RDYBSY IDMREG_BIT_FIELD(0x500, 1, 1) -+#define NANDC_IDM_IO_CTRL_RDY IDMREG_BIT_FIELD(0x500, 0, 1) -+ -+#define NANDC_IDM_RESET IDMREG_BIT_FIELD(0x800, 0, 1) -+ /* Remaining IDM registers do not seem to be useful, skipped */ -+ -+/* -+ * NAND Controller has its own command opcodes -+ * different from opcodes sent to the actual flash chip -+ */ -+#define NANDC_CMD_OPCODE_NULL 0 -+#define NANDC_CMD_OPCODE_PAGE_READ 1 -+#define NANDC_CMD_OPCODE_SPARE_READ 2 -+#define NANDC_CMD_OPCODE_STATUS_READ 3 -+#define NANDC_CMD_OPCODE_PAGE_PROG 4 -+#define NANDC_CMD_OPCODE_SPARE_PROG 5 -+#define NANDC_CMD_OPCODE_DEVID_READ 7 -+#define NANDC_CMD_OPCODE_BLOCK_ERASE 8 -+#define NANDC_CMD_OPCODE_FLASH_RESET 9 -+ -+/* -+ * NAND Controller hardware ECC data size -+ * -+ * The following table contains the number of bytes needed for -+ * each of the ECC levels, per "sector", which is either 512 or 1024 bytes. -+ * The actual layout is as follows: -+ * The entire spare area is equally divided into as many sections as there -+ * are sectors per page, and the ECC data is located at the end of each -+ * of these sections. -+ * For example, given a 2K per page and 64 bytes spare device, configured for -+ * sector size 1k and ECC level of 4, the spare area will be divided into 2 -+ * sections 32 bytes each, and the last 14 bytes of 32 in each section will -+ * be filled with ECC data. -+ * Note: the name of the algorythm and the number of error bits it can correct -+ * is of no consequence to this driver, therefore omitted. -+ */ -+struct bcmnand_ecc_size_s { -+ unsigned char sector_size_shift; -+ unsigned char ecc_level; -+ unsigned char ecc_bytes_per_sec; -+ unsigned char reserved; -+}; -+ -+static const struct bcmnand_ecc_size_s bcmnand_ecc_sizes[] = { -+ { 9, 0, 0 }, -+ { 10, 0, 0 }, -+ { 9, 1, 2 }, -+ { 10, 1, 4 }, -+ { 9, 2, 4 }, -+ { 10, 2, 7 }, -+ { 9, 3, 6 }, -+ { 10, 3, 11 }, -+ { 9, 4, 7 }, -+ { 10, 4, 14 }, -+ { 9, 5, 9 }, -+ { 10, 5, 18 }, -+ { 9, 6, 11 }, -+ { 10, 6, 21 }, -+ { 9, 7, 13 }, -+ { 10, 7, 25 }, -+ { 9, 8, 14 }, -+ { 10, 8, 28 }, -+ -+ { 9, 9, 16 }, -+ { 9, 10, 18 }, -+ { 9, 11, 20 }, -+ { 9, 12, 21 }, -+ -+ { 10, 9, 32 }, -+ { 10, 10, 35 }, -+ { 10, 11, 39 }, -+ { 10, 12, 42 }, -+}; -+ -+/* -+ * Populate the various fields that depend on how -+ * the hardware ECC data is located in the spare area -+ * -+ * For this controiller, it is easier to fill-in these -+ * structures at run time. -+ * -+ * The bad-block marker is assumed to occupy one byte -+ * at chip->badblockpos, which must be in the first -+ * sector of the spare area, namely it is either -+ * at offset 0 or 5. -+ * Some chips use both for manufacturer's bad block -+ * markers, but we ingore that issue here, and assume only -+ * one byte is used as bad-block marker always. -+ */ -+static int bcmnand_hw_ecc_layout(struct bcmnand_ctrl *ctrl) -+{ -+ struct nand_ecclayout *layout; -+ struct device *dev = &ctrl->core->dev; -+ unsigned int i, j, k; -+ unsigned int ecc_per_sec, oob_per_sec; -+ unsigned int bbm_pos = ctrl->nand.badblockpos; -+ -+ /* Caclculate spare area per sector size */ -+ oob_per_sec = ctrl->mtd.oobsize >> ctrl->sec_per_page_shift; -+ -+ /* Try to calculate the amount of ECC bytes per sector with a formula */ -+ if (ctrl->sector_size_shift == 9) -+ ecc_per_sec = ((ctrl->ecc_level * 14) + 7) >> 3; -+ else if (ctrl->sector_size_shift == 10) -+ ecc_per_sec = ((ctrl->ecc_level * 14) + 3) >> 2; -+ else -+ ecc_per_sec = oob_per_sec + 1; /* cause an error if not in table */ -+ -+ /* Now find out the answer according to the table */ -+ for (i = 0; i < ARRAY_SIZE(bcmnand_ecc_sizes); i++) { -+ if (bcmnand_ecc_sizes[i].ecc_level == ctrl->ecc_level && -+ bcmnand_ecc_sizes[i].sector_size_shift == -+ ctrl->sector_size_shift) { -+ break; -+ } -+ } -+ -+ /* Table match overrides formula */ -+ if (bcmnand_ecc_sizes[i].ecc_level == ctrl->ecc_level && -+ bcmnand_ecc_sizes[i].sector_size_shift == ctrl->sector_size_shift) -+ ecc_per_sec = bcmnand_ecc_sizes[i].ecc_bytes_per_sec; -+ -+ /* Return an error if calculated ECC leaves no room for OOB */ -+ if ((ctrl->sec_per_page_shift != 0 && ecc_per_sec >= oob_per_sec) || -+ (ctrl->sec_per_page_shift == 0 && ecc_per_sec >= (oob_per_sec - 1))) { -+ dev_err(dev, "ECC level %d too high, leaves no room for OOB data\n", -+ ctrl->ecc_level); -+ return -EINVAL; -+ } -+ -+ /* Fill in the needed fields */ -+ ctrl->nand.ecc.size = ctrl->mtd.writesize >> ctrl->sec_per_page_shift; -+ ctrl->nand.ecc.bytes = ecc_per_sec; -+ ctrl->nand.ecc.steps = 1 << ctrl->sec_per_page_shift; -+ ctrl->nand.ecc.total = ecc_per_sec << ctrl->sec_per_page_shift; -+ ctrl->nand.ecc.strength = ctrl->ecc_level; -+ -+ /* Build an ecc layout data structure */ -+ layout = &ctrl->ecclayout; -+ memset(layout, 0, sizeof(*layout)); -+ -+ /* Total number of bytes used by HW ECC */ -+ layout->eccbytes = ecc_per_sec << ctrl->sec_per_page_shift; -+ -+ /* Location for each of the HW ECC bytes */ -+ for (i = j = 0, k = 1; -+ i < ARRAY_SIZE(layout->eccpos) && i < layout->eccbytes; -+ i++, j++) { -+ /* switch sector # */ -+ if (j == ecc_per_sec) { -+ j = 0; -+ k++; -+ } -+ /* save position of each HW-generated ECC byte */ -+ layout->eccpos[i] = (oob_per_sec * k) - ecc_per_sec + j; -+ -+ /* Check that HW ECC does not overlap bad-block marker */ -+ if (bbm_pos == layout->eccpos[i]) { -+ dev_err(dev, "ECC level %d too high, HW ECC collides with bad-block marker position\n", -+ ctrl->ecc_level); -+ return -EINVAL; -+ } -+ } -+ -+ /* Location of all user-available OOB byte-ranges */ -+ for (i = 0; i < ARRAY_SIZE(layout->oobfree); i++) { -+ struct nand_oobfree *oobfree = &layout->oobfree[i]; -+ -+ if (i >= (1 << ctrl->sec_per_page_shift)) -+ break; -+ oobfree->offset = oob_per_sec * i; -+ oobfree->length = oob_per_sec - ecc_per_sec; -+ -+ /* Bad-block marker must be in the first sector spare area */ -+ if (WARN_ON(bbm_pos >= (oobfree->offset + oobfree->length))) -+ return -EINVAL; -+ -+ if (i != 0) -+ continue; -+ -+ /* Remove bad-block marker from available byte range */ -+ if (bbm_pos == oobfree->offset) { -+ oobfree->offset += 1; -+ oobfree->length -= 1; -+ } else if (bbm_pos == (oobfree->offset + oobfree->length - 1)) { -+ oobfree->length -= 1; -+ } else { -+ layout->oobfree[i + 1].offset = bbm_pos + 1; -+ layout->oobfree[i + 1].length = -+ oobfree->length - bbm_pos - 1; -+ oobfree->length = bbm_pos; -+ i++; -+ } -+ } -+ -+ layout->oobavail = ((oob_per_sec - ecc_per_sec) -+ << ctrl->sec_per_page_shift) - 1; -+ -+ ctrl->mtd.oobavail = layout->oobavail; -+ ctrl->nand.ecc.layout = layout; -+ -+ /* Output layout for debugging */ -+ dev_dbg(dev, "Spare area=%d eccbytes %d, ecc bytes located at:\n", -+ ctrl->mtd.oobsize, layout->eccbytes); -+ for (i = j = 0; -+ i < ARRAY_SIZE(layout->eccpos) && i < layout->eccbytes; i++) -+ pr_debug(" %d", layout->eccpos[i]); -+ pr_debug("\n"); -+ -+ dev_dbg(dev, "Available %d bytes at (off,len):\n", layout->oobavail); -+ for (i = 0; i < ARRAY_SIZE(layout->oobfree); i++) -+ pr_debug("(%d,%d) ", layout->oobfree[i].offset, -+ layout->oobfree[i].length); -+ pr_debug("\n"); -+ -+ return 0; -+} -+ -+/* -+ * Register bit-field manipulation routines -+ */ -+ -+static inline unsigned int bcmnand_reg_read(struct bcmnand_ctrl *ctrl, -+ struct bcmnand_reg_field rbf) -+{ -+ u32 val; -+ -+ val = bcma_read32(ctrl->core, rbf.reg); -+ val >>= rbf.pos; -+ val &= (1 << rbf.width) - 1; -+ -+ return val; -+} -+ -+static inline void bcmnand_reg_write(struct bcmnand_ctrl *ctrl, -+ struct bcmnand_reg_field rbf, -+ unsigned newval) -+{ -+ u32 val, msk; -+ -+ msk = (1 << rbf.width) - 1; -+ msk <<= rbf.pos; -+ newval <<= rbf.pos; -+ newval &= msk; -+ -+ val = bcma_read32(ctrl->core, rbf.reg); -+ val &= ~msk; -+ val |= newval; -+ bcma_write32(ctrl->core, rbf.reg, val); -+} -+ -+static inline unsigned int bcmnand_reg_aread(struct bcmnand_ctrl *ctrl, -+ struct bcmnand_areg_field rbf) -+{ -+ u32 val; -+ -+ val = bcma_aread32(ctrl->core, rbf.reg); -+ val >>= rbf.pos; -+ val &= (1 << rbf.width) - 1; -+ -+ return val; -+} -+ -+static inline void bcmnand_reg_awrite(struct bcmnand_ctrl *ctrl, -+ struct bcmnand_areg_field rbf, -+ unsigned int newval) -+{ -+ u32 val, msk; -+ -+ msk = (1 << rbf.width) - 1; -+ msk <<= rbf.pos; -+ newval <<= rbf.pos; -+ newval &= msk; -+ -+ val = bcma_aread32(ctrl->core, rbf.reg); -+ val &= ~msk; -+ val |= newval; -+ bcma_awrite32(ctrl->core, rbf.reg, val); -+} -+ -+/* -+ * NAND Interface - dev_ready -+ * -+ * Return 1 iff device is ready, 0 otherwise -+ */ -+static int bcmnand_dev_ready(struct mtd_info *mtd) -+{ -+ struct nand_chip *chip = mtd->priv; -+ struct bcmnand_ctrl *ctrl = chip->priv; -+ -+ return bcmnand_reg_aread(ctrl, NANDC_IDM_IO_CTRL_RDY); -+} -+ -+/* -+ * Interrupt service routines -+ */ -+static irqreturn_t bcmnand_isr(int irq, void *dev_id) -+{ -+ struct bcmnand_ctrl *ctrl = dev_id; -+ int irq_off; -+ -+ irq_off = irq - ctrl->core->irq; -+ WARN_ON(irq_off < 0 || irq_off >= NANDC_IRQ_NUM); -+ -+ if (!bcmnand_reg_read(ctrl, NANDC_INT_N_REG(irq_off))) -+ return IRQ_NONE; -+ -+ /* Acknowledge interrupt */ -+ bcmnand_reg_write(ctrl, NANDC_INT_N_REG(irq_off), 1); -+ -+ /* Wake up task */ -+ complete(&ctrl->op_completion); -+ -+ return IRQ_HANDLED; -+} -+ -+static int bcmnand_wait_interrupt(struct bcmnand_ctrl *ctrl, -+ unsigned int irq_off, -+ unsigned int timeout_usec) -+{ -+ long timeout_jiffies; -+ int ret = 0; -+ -+ reinit_completion(&ctrl->op_completion); -+ -+ /* Acknowledge interrupt */ -+ bcmnand_reg_write(ctrl, NANDC_INT_N_REG(irq_off), 1); -+ -+ /* Enable IRQ to wait on */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_IRQ_N_EN(irq_off), 1); -+ -+ timeout_jiffies = 1 + usecs_to_jiffies(timeout_usec); -+ -+ if (irq_off != NANDC_IRQ_CONTROLLER_RDY || -+ 0 == bcmnand_reg_aread(ctrl, NANDC_IDM_IO_CTRL_RDY)) { -+ -+ timeout_jiffies = wait_for_completion_timeout( -+ &ctrl->op_completion, timeout_jiffies); -+ -+ if (timeout_jiffies < 0) -+ ret = timeout_jiffies; -+ if (timeout_jiffies == 0) -+ ret = -ETIME; -+ } -+ -+ /* Disable IRQ, we're done waiting */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_IRQ_N_EN(irq_off), 0); -+ -+ if (bcmnand_reg_aread(ctrl, NANDC_IDM_IO_CTRL_RDY)) -+ ret = 0; -+ -+ return ret; -+} -+ -+/* -+ * wait for command completion -+ */ -+static int bcmnand_wait_cmd(struct bcmnand_ctrl *ctrl, unsigned int timeout_usec) -+{ -+ unsigned int retries; -+ -+ if (bcmnand_reg_read(ctrl, NANDC_INT_STAT_CTLR_RDY)) -+ return 0; -+ -+ /* If the timeout is long, wait for interrupt */ -+ if (timeout_usec >= jiffies_to_usecs(1) >> 4) -+ return bcmnand_wait_interrupt( -+ ctrl, NANDC_IRQ_CONTROLLER_RDY, timeout_usec); -+ -+ /* Wait for completion of the prior command */ -+ retries = (timeout_usec >> 3) + 1; -+ -+ while (retries-- && -+ 0 == bcmnand_reg_read(ctrl, NANDC_INT_STAT_CTLR_RDY)) { -+ cpu_relax(); -+ udelay(6); -+ } -+ -+ if (retries == 0) -+ return -ETIME; -+ -+ return 0; -+} -+ -+ -+/* -+ * NAND Interface - waitfunc -+ */ -+static int bcmnand_waitfunc(struct mtd_info *mtd, struct nand_chip *chip) -+{ -+ struct bcmnand_ctrl *ctrl = chip->priv; -+ unsigned int to; -+ int ret; -+ -+ /* figure out timeout based on what command is on */ -+ switch (ctrl->last_cmd) { -+ default: -+ case NAND_CMD_ERASE1: -+ case NAND_CMD_ERASE2: -+ to = 1 << 16; -+ break; -+ case NAND_CMD_STATUS: -+ case NAND_CMD_RESET: -+ to = 256; -+ break; -+ case NAND_CMD_READID: -+ to = 1024; -+ break; -+ case NAND_CMD_READ1: -+ case NAND_CMD_READ0: -+ to = 2048; -+ break; -+ case NAND_CMD_PAGEPROG: -+ to = 4096; -+ break; -+ case NAND_CMD_READOOB: -+ to = 512; -+ break; -+ } -+ -+ /* deliver deferred error code if any */ -+ ret = ctrl->cmd_ret; -+ if (ret < 0) -+ ctrl->cmd_ret = 0; -+ else -+ ret = bcmnand_wait_cmd(ctrl, to); -+ -+ /* Timeout */ -+ if (ret < 0) -+ return NAND_STATUS_FAIL; -+ -+ ret = bcmnand_reg_read(ctrl, NANDC_INT_STAT_FLASH_STATUS); -+ -+ return ret; -+} -+ -+/* -+ * NAND Interface - read_oob -+ */ -+static int bcmnand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, -+ int page) -+{ -+ struct bcmnand_ctrl *ctrl = chip->priv; -+ unsigned int n = ctrl->chip_num; -+ void __iomem *ctrl_spare; -+ unsigned int spare_per_sec, sector; -+ u64 nand_addr; -+ -+ ctrl_spare = ctrl->core->io_addr + NANDC_SPARE_AREA_READ_OFF; -+ -+ /* Set the page address for the following commands */ -+ nand_addr = ((u64)page << chip->page_shift); -+ bcmnand_reg_write(ctrl, NANDC_CMD_EXT_ADDR, nand_addr >> 32); -+ -+ spare_per_sec = mtd->oobsize >> ctrl->sec_per_page_shift; -+ -+ /* Disable ECC validation for spare area reads */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_RD_ECC(n), 0); -+ -+ /* Loop all sectors in page */ -+ for (sector = 0; sector < (1<<ctrl->sec_per_page_shift); sector++) { -+ unsigned int col; -+ -+ col = (sector << ctrl->sector_size_shift); -+ -+ /* Issue command to read partial page */ -+ bcmnand_reg_write(ctrl, NANDC_CMD_ADDRESS, nand_addr + col); -+ -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_SPARE_READ); -+ -+ /* Wait for the command to complete */ -+ if (bcmnand_wait_cmd(ctrl, (sector == 0) ? 10000 : 100)) -+ return -EIO; -+ -+ if (!bcmnand_reg_read(ctrl, NANDC_INT_STAT_SPARE_VALID)) -+ return -EIO; -+ -+ /* Set controller to Little Endian mode for copying */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 1); -+ -+ memcpy(chip->oob_poi + sector * spare_per_sec, -+ ctrl_spare, spare_per_sec); -+ -+ /* Return to Big Endian mode for commands etc */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 0); -+ } -+ -+ return 0; -+} -+ -+/* -+ * NAND Interface - write_oob -+ */ -+static int bcmnand_write_oob(struct mtd_info *mtd, struct nand_chip *chip, -+ int page) -+{ -+ struct bcmnand_ctrl *ctrl = chip->priv; -+ unsigned int n = ctrl->chip_num; -+ void __iomem *ctrl_spare; -+ unsigned int spare_per_sec, sector, num_sec; -+ u64 nand_addr; -+ int to, status = 0; -+ -+ ctrl_spare = ctrl->core->io_addr + NANDC_SPARE_AREA_WRITE_OFF; -+ -+ /* Disable ECC generation for spare area writes */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_WR_ECC(n), 0); -+ -+ spare_per_sec = mtd->oobsize >> ctrl->sec_per_page_shift; -+ -+ /* Set the page address for the following commands */ -+ nand_addr = ((u64)page << chip->page_shift); -+ bcmnand_reg_write(ctrl, NANDC_CMD_EXT_ADDR, nand_addr >> 32); -+ -+ /* Must allow partial programming to change spare area only */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_PGM_PARTIAL(n), 1); -+ -+ num_sec = 1 << ctrl->sec_per_page_shift; -+ /* Loop all sectors in page */ -+ for (sector = 0; sector < num_sec; sector++) { -+ unsigned int col; -+ -+ /* Spare area accessed by the data sector offset */ -+ col = (sector << ctrl->sector_size_shift); -+ -+ bcmnand_reg_write(ctrl, NANDC_CMD_ADDRESS, nand_addr + col); -+ -+ /* Set controller to Little Endian mode for copying */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 1); -+ -+ memcpy(ctrl_spare, chip->oob_poi + sector * spare_per_sec, -+ spare_per_sec); -+ -+ /* Return to Big Endian mode for commands etc */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 0); -+ -+ /* Push spare bytes into internal buffer, last goes to flash */ -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_SPARE_PROG); -+ -+ if (sector == (num_sec - 1)) -+ to = 1 << 16; -+ else -+ to = 1 << 10; -+ -+ if (bcmnand_wait_cmd(ctrl, to)) -+ return -EIO; -+ } -+ -+ /* Restore partial programming inhibition */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_PGM_PARTIAL(n), 0); -+ -+ status = bcmnand_waitfunc(mtd, chip); -+ return status & NAND_STATUS_FAIL ? -EIO : 0; -+} -+ -+/* -+ * verify that a buffer is all erased -+ */ -+static bool bcmnand_buf_erased(const void *buf, unsigned int len) -+{ -+ unsigned int i; -+ const u32 *p = buf; -+ -+ for (i = 0; i < (len >> 2); i++) { -+ if (p[i] != 0xffffffff) -+ return false; -+ } -+ return true; -+} -+ -+/* -+ * read a page, with or without ECC checking -+ */ -+static int bcmnand_read_page_do(struct mtd_info *mtd, struct nand_chip *chip, -+ uint8_t *buf, int page, bool ecc) -+{ -+ struct bcmnand_ctrl *ctrl = chip->priv; -+ unsigned int n = ctrl->chip_num; -+ void __iomem *ctrl_cache; -+ void __iomem *ctrl_spare; -+ unsigned int data_bytes; -+ unsigned int spare_per_sec; -+ unsigned int sector, to = 1 << 16; -+ u32 err_soft_reg, err_hard_reg; -+ unsigned int hard_err_count = 0; -+ int ret; -+ u64 nand_addr; -+ -+ ctrl_cache = ctrl->core->io_addr + NANDC_CACHE_OFF; -+ ctrl_spare = ctrl->core->io_addr + NANDC_SPARE_AREA_READ_OFF; -+ -+ /* Reset ECC error stats */ -+ err_hard_reg = bcmnand_reg_read(ctrl, NANDC_UNCORR_ERR_COUNT); -+ err_soft_reg = bcmnand_reg_read(ctrl, NANDC_READ_CORR_BIT_COUNT); -+ -+ spare_per_sec = mtd->oobsize >> ctrl->sec_per_page_shift; -+ -+ /* Set the page address for the following commands */ -+ nand_addr = ((u64)page << chip->page_shift); -+ bcmnand_reg_write(ctrl, NANDC_CMD_EXT_ADDR, nand_addr >> 32); -+ -+ /* Enable ECC validation for ecc page reads */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_RD_ECC(n), ecc); -+ -+ /* Loop all sectors in page */ -+ for (sector = 0; sector < (1 << ctrl->sec_per_page_shift); sector++) { -+ data_bytes = 0; -+ -+ /* Copy partial sectors sized by cache reg */ -+ while (data_bytes < (1<<ctrl->sector_size_shift)) { -+ unsigned int col; -+ -+ col = data_bytes + (sector << ctrl->sector_size_shift); -+ -+ bcmnand_reg_write(ctrl, NANDC_CMD_ADDRESS, -+ nand_addr + col); -+ -+ /* Issue command to read partial page */ -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_PAGE_READ); -+ -+ /* Wait for the command to complete */ -+ ret = bcmnand_wait_cmd(ctrl, to); -+ if (ret < 0) -+ return ret; -+ -+ /* Set controller to Little Endian mode for copying */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 1); -+ -+ if (data_bytes == 0) { -+ memcpy(chip->oob_poi + sector * spare_per_sec, -+ ctrl_spare, spare_per_sec); -+ } -+ -+ memcpy(buf + col, ctrl_cache, NANDC_CACHE_SIZE); -+ data_bytes += NANDC_CACHE_SIZE; -+ -+ /* Return to Big Endian mode for commands etc */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 0); -+ -+ /* Next iterations should go fast */ -+ to = 1 << 10; -+ -+ /* capture hard errors for each partial */ -+ if (err_hard_reg != bcmnand_reg_read(ctrl, NANDC_UNCORR_ERR_COUNT)) { -+ int era = bcmnand_reg_read(ctrl, NANDC_INT_STAT_ERASED); -+ -+ if (!era && -+ !bcmnand_buf_erased(buf + col, NANDC_CACHE_SIZE)) -+ hard_err_count++; -+ -+ err_hard_reg = bcmnand_reg_read(ctrl, -+ NANDC_UNCORR_ERR_COUNT); -+ } -+ } -+ } -+ -+ if (!ecc) -+ return 0; -+ -+ /* Report hard ECC errors */ -+ if (hard_err_count) -+ mtd->ecc_stats.failed++; -+ -+ /* Get ECC soft error stats */ -+ mtd->ecc_stats.corrected += err_soft_reg - -+ bcmnand_reg_read(ctrl, NANDC_READ_CORR_BIT_COUNT); -+ -+ return 0; -+} -+ -+/* -+ * NAND Interface - read_page_ecc -+ */ -+static int bcmnand_read_page_ecc(struct mtd_info *mtd, struct nand_chip *chip, -+ uint8_t *buf, int oob_required, int page) -+{ -+ return bcmnand_read_page_do(mtd, chip, buf, page, true); -+} -+ -+/* -+ * NAND Interface - read_page_raw -+ */ -+static int bcmnand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, -+ uint8_t *buf, int oob_required, int page) -+{ -+ return bcmnand_read_page_do(mtd, chip, buf, page, true); -+} -+ -+/* -+ * do page write, with or without ECC generation enabled -+ */ -+static int bcmnand_write_page_do(struct mtd_info *mtd, struct nand_chip *chip, -+ const uint8_t *buf, bool ecc) -+{ -+ struct bcmnand_ctrl *ctrl = chip->priv; -+ unsigned int n = ctrl->chip_num; -+ void __iomem *ctrl_cache; -+ void __iomem *ctrl_spare; -+ unsigned int spare_per_sec, sector, num_sec; -+ unsigned int data_bytes, spare_bytes; -+ int i, to; -+ uint8_t *tmp_poi; -+ u32 nand_addr; -+ -+ ctrl_cache = ctrl->core->io_addr + NANDC_CACHE_OFF; -+ ctrl_spare = ctrl->core->io_addr + NANDC_SPARE_AREA_WRITE_OFF; -+ -+ /* Get start-of-page address */ -+ nand_addr = bcmnand_reg_read(ctrl, NANDC_CMD_ADDRESS); -+ -+ tmp_poi = kmalloc(mtd->oobsize, GFP_KERNEL); -+ if (!tmp_poi) -+ return -ENOMEM; -+ -+ /* Retreive pre-existing OOB values */ -+ memcpy(tmp_poi, chip->oob_poi, mtd->oobsize); -+ ctrl->cmd_ret = bcmnand_read_oob(mtd, chip, -+ nand_addr >> chip->page_shift); -+ if (ctrl->cmd_ret < 0) { -+ kfree(tmp_poi); -+ return ctrl->cmd_ret; -+ } -+ -+ /* Apply new OOB data bytes just like they would end up on the chip */ -+ for (i = 0; i < mtd->oobsize; i++) -+ chip->oob_poi[i] &= tmp_poi[i]; -+ kfree(tmp_poi); -+ -+ spare_per_sec = mtd->oobsize >> ctrl->sec_per_page_shift; -+ -+ /* Enable ECC generation for ecc page write, if requested */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_WR_ECC(n), ecc); -+ -+ spare_bytes = 0; -+ num_sec = 1 << ctrl->sec_per_page_shift; -+ -+ /* Loop all sectors in page */ -+ for (sector = 0; sector < num_sec; sector++) { -+ data_bytes = 0; -+ -+ /* Copy partial sectors sized by cache reg */ -+ while (data_bytes < (1<<ctrl->sector_size_shift)) { -+ unsigned int col; -+ -+ col = data_bytes + -+ (sector << ctrl->sector_size_shift); -+ -+ /* Set address of 512-byte sub-page */ -+ bcmnand_reg_write(ctrl, NANDC_CMD_ADDRESS, -+ nand_addr + col); -+ -+ /* Set controller to Little Endian mode for copying */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, -+ 1); -+ -+ /* Set spare area is written at each sector start */ -+ if (data_bytes == 0) { -+ memcpy(ctrl_spare, -+ chip->oob_poi + spare_bytes, -+ spare_per_sec); -+ spare_bytes += spare_per_sec; -+ } -+ -+ /* Copy sub-page data */ -+ memcpy(ctrl_cache, buf + col, NANDC_CACHE_SIZE); -+ data_bytes += NANDC_CACHE_SIZE; -+ -+ /* Return to Big Endian mode for commands etc */ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 0); -+ -+ /* Push data into internal cache */ -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_PAGE_PROG); -+ -+ /* Wait for the command to complete */ -+ if (sector == (num_sec - 1)) -+ to = 1 << 16; -+ else -+ to = 1 << 10; -+ ctrl->cmd_ret = bcmnand_wait_cmd(ctrl, to); -+ if (ctrl->cmd_ret < 0) -+ return ctrl->cmd_ret; -+ } -+ } -+ return 0; -+} -+ -+/* -+ * NAND Interface = write_page_ecc -+ */ -+static int bcmnand_write_page_ecc(struct mtd_info *mtd, struct nand_chip *chip, -+ const uint8_t *buf, int oob_required) -+{ -+ return bcmnand_write_page_do(mtd, chip, buf, true); -+} -+ -+/* -+ * NAND Interface = write_page_raw -+ */ -+static int bcmnand_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, -+ const uint8_t *buf, int oob_required) -+{ -+ return bcmnand_write_page_do(mtd, chip, buf, false); -+} -+ -+/* -+ * MTD Interface - read_byte -+ * -+ * This function emulates simple controllers behavior -+ * for just a few relevant commands -+ */ -+static uint8_t bcmnand_read_byte(struct mtd_info *mtd) -+{ -+ struct nand_chip *nand = mtd->priv; -+ struct bcmnand_ctrl *ctrl = nand->priv; -+ struct device *dev = &ctrl->core->dev; -+ uint8_t b = ~0; -+ -+ switch (ctrl->last_cmd) { -+ case NAND_CMD_READID: -+ if (ctrl->id_byte_index < 8) { -+ b = bcmnand_reg_read(ctrl, NANDC_DEVID_BYTE( -+ ctrl->id_byte_index)); -+ ctrl->id_byte_index++; -+ } -+ break; -+ case NAND_CMD_READOOB: -+ if (ctrl->oob_index < mtd->oobsize) -+ b = nand->oob_poi[ctrl->oob_index++]; -+ break; -+ case NAND_CMD_STATUS: -+ b = bcmnand_reg_read(ctrl, NANDC_INT_STAT_FLASH_STATUS); -+ break; -+ default: -+ dev_err(dev, "got unkown command: 0x%x in read_byte\n", -+ ctrl->last_cmd); -+ } -+ return b; -+} -+ -+/* -+ * MTD Interface - read_word -+ * -+ * Can not be tested without x16 chip, but the SoC does not support x16 i/f. -+ */ -+static u16 bcmnand_read_word(struct mtd_info *mtd) -+{ -+ u16 w = ~0; -+ -+ w = bcmnand_read_byte(mtd); -+ barrier(); -+ w |= bcmnand_read_byte(mtd) << 8; -+ -+ return w; -+} -+ -+/* -+ * MTD Interface - select a chip from an array -+ */ -+static void bcmnand_select_chip(struct mtd_info *mtd, int chip) -+{ -+ struct nand_chip *nand = mtd->priv; -+ struct bcmnand_ctrl *ctrl = nand->priv; -+ -+ ctrl->chip_num = chip; -+ bcmnand_reg_write(ctrl, NANDC_CMD_CS_SEL, chip); -+} -+ -+/* -+ * NAND Interface - emulate low-level NAND commands -+ * -+ * Only a few low-level commands are really needed by generic NAND, -+ * and they do not call for CMD_LL operations the controller can support. -+ */ -+static void bcmnand_cmdfunc(struct mtd_info *mtd, unsigned int command, -+ int column, int page_addr) -+{ -+ struct nand_chip *nand = mtd->priv; -+ struct bcmnand_ctrl *ctrl = nand->priv; -+ struct device *dev = &ctrl->core->dev; -+ u64 nand_addr; -+ unsigned int to = 1; -+ -+ ctrl->last_cmd = command; -+ -+ /* Set address for some commands */ -+ switch (command) { -+ case NAND_CMD_ERASE1: -+ column = 0; -+ /*FALLTHROUGH*/ -+ case NAND_CMD_SEQIN: -+ case NAND_CMD_READ0: -+ case NAND_CMD_READ1: -+ WARN_ON(column >= mtd->writesize); -+ nand_addr = (u64) column | -+ ((u64)page_addr << nand->page_shift); -+ bcmnand_reg_write(ctrl, NANDC_CMD_EXT_ADDR, nand_addr >> 32); -+ bcmnand_reg_write(ctrl, NANDC_CMD_ADDRESS, nand_addr); -+ break; -+ case NAND_CMD_ERASE2: -+ case NAND_CMD_RESET: -+ case NAND_CMD_READID: -+ case NAND_CMD_READOOB: -+ case NAND_CMD_PAGEPROG: -+ default: -+ /* Do nothing, address not used */ -+ break; -+ } -+ -+ /* Issue appropriate command to controller */ -+ switch (command) { -+ case NAND_CMD_SEQIN: -+ /* Only need to load command address, done */ -+ return; -+ -+ case NAND_CMD_RESET: -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_FLASH_RESET); -+ to = 1 << 8; -+ break; -+ -+ case NAND_CMD_READID: -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_DEVID_READ); -+ ctrl->id_byte_index = 0; -+ to = 1 << 8; -+ break; -+ -+ case NAND_CMD_READ0: -+ case NAND_CMD_READ1: -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_PAGE_READ); -+ to = 1 << 15; -+ break; -+ case NAND_CMD_STATUS: -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_STATUS_READ); -+ to = 1 << 8; -+ break; -+ case NAND_CMD_ERASE1: -+ return; -+ -+ case NAND_CMD_ERASE2: -+ bcmnand_reg_write(ctrl, NANDC_CMD_START_OPCODE, -+ NANDC_CMD_OPCODE_BLOCK_ERASE); -+ to = 1 << 18; -+ break; -+ -+ case NAND_CMD_PAGEPROG: -+ /* Cmd already set from write_page */ -+ return; -+ -+ case NAND_CMD_READOOB: -+ /* Emulate simple interface */ -+ bcmnand_read_oob(mtd, nand, page_addr); -+ ctrl->oob_index = 0; -+ return; -+ -+ default: -+ dev_err(dev, "got unkown command: 0x%x in cmdfunc\n", -+ ctrl->last_cmd); -+ } -+ -+ /* Wait for command to complete */ -+ ctrl->cmd_ret = bcmnand_wait_cmd(ctrl, to); -+ -+} -+ -+static int bcmnand_scan(struct mtd_info *mtd) -+{ -+ struct nand_chip *nand = mtd->priv; -+ struct bcmnand_ctrl *ctrl = nand->priv; -+ struct device *dev = &ctrl->core->dev; -+ bool sector_1k = false; -+ unsigned int chip_num = 0; -+ int ecc_level = 0; -+ int ret; -+ -+ ret = nand_scan_ident(mtd, NANDC_MAX_CHIPS, NULL); -+ if (ret) -+ return ret; -+ -+ /* Get configuration from first chip */ -+ sector_1k = bcmnand_reg_read(ctrl, NANDC_ACC_CTRL_SECTOR_1K(0)); -+ ecc_level = bcmnand_reg_read(ctrl, NANDC_ACC_CTRL_ECC_LEVEL(0)); -+ mtd->writesize_shift = nand->page_shift; -+ -+ ctrl->ecc_level = ecc_level; -+ ctrl->sector_size_shift = sector_1k ? 10 : 9; -+ -+ /* Configure spare area, tweak as needed */ -+ do { -+ ctrl->sec_per_page_shift = -+ mtd->writesize_shift - ctrl->sector_size_shift; -+ -+ /* will return -EINVAL if OOB space exhausted */ -+ ret = bcmnand_hw_ecc_layout(ctrl); -+ -+ /* First try to bump sector size to 1k, then decrease level */ -+ if (ret && nand->page_shift > 9 && ctrl->sector_size_shift < 10) -+ ctrl->sector_size_shift = 10; -+ else if (ret) -+ ctrl->ecc_level--; -+ -+ } while (ret && ctrl->ecc_level > 0); -+ -+ if (WARN_ON(ctrl->ecc_level == 0)) -+ return -ENOENT; -+ -+ if ((ctrl->sector_size_shift > 9) != (sector_1k == 1)) { -+ dev_info(dev, "sector size adjusted to 1k\n"); -+ sector_1k = 1; -+ } -+ -+ if (ecc_level != ctrl->ecc_level) { -+ dev_info(dev, "ECC level adjusted from %u to %u\n", -+ ecc_level, ctrl->ecc_level); -+ ecc_level = ctrl->ecc_level; -+ } -+ -+ /* handle the hardware chip config registers */ -+ for (chip_num = 0; chip_num < nand->numchips; chip_num++) { -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_SECTOR_1K(chip_num), -+ sector_1k); -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_ECC_LEVEL(chip_num), -+ ecc_level); -+ -+ /* Large pages: no partial page programming */ -+ if (mtd->writesize > 512) { -+ bcmnand_reg_write(ctrl, -+ NANDC_ACC_CTRL_PGM_RDIN(chip_num), 0); -+ bcmnand_reg_write(ctrl, -+ NANDC_ACC_CTRL_PGM_PARTIAL(chip_num), 0); -+ } -+ -+ /* Do not raise ECC error when reading erased pages */ -+ /* This bit has only partial effect, driver needs to help */ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_ERA_ECC_ERR(chip_num), -+ 0); -+ -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_PG_HIT(chip_num), 0); -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_PREFETCH(chip_num), 0); -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_CACHE_MODE(chip_num), 0); -+ bcmnand_reg_write(ctrl, NANDC_ACC_CTRL_CACHE_LASTPG(chip_num), -+ 0); -+ -+ /* TBD: consolidate or at least verify the s/w and h/w geometries agree */ -+ } -+ -+ /* Allow writing on device */ -+ if (!(nand->options & NAND_ROM)) -+ bcmnand_reg_write(ctrl, NANDC_CS_NAND_WP, 0); -+ -+ dev_dbg(dev, "layout.oobavail=%d\n", nand->ecc.layout->oobavail); -+ -+ ret = nand_scan_tail(mtd); -+ -+ if (nand->badblockbits == 0) -+ nand->badblockbits = 8; -+ if (WARN_ON((1 << nand->page_shift) != mtd->writesize)) -+ return -EIO; -+ -+ /* Spit out some key chip parameters as detected by nand_base */ -+ dev_dbg(dev, "erasesize=%d writesize=%d oobsize=%d page_shift=%d badblockpos=%d badblockbits=%d\n", -+ mtd->erasesize, mtd->writesize, mtd->oobsize, -+ nand->page_shift, nand->badblockpos, nand->badblockbits); -+ -+ return ret; -+} -+ -+/* -+ * main intiailization function -+ */ -+static int bcmnand_ctrl_init(struct bcmnand_ctrl *ctrl) -+{ -+ unsigned int chip; -+ struct nand_chip *nand; -+ struct mtd_info *mtd; -+ struct device *dev = &ctrl->core->dev; -+ int ret; -+ -+ /* Software variables init */ -+ nand = &ctrl->nand; -+ mtd = &ctrl->mtd; -+ -+ init_completion(&ctrl->op_completion); -+ -+ mtd->priv = nand; -+ mtd->owner = THIS_MODULE; -+ mtd->name = KBUILD_MODNAME; -+ -+ nand->priv = ctrl; -+ -+ nand->chip_delay = 5; /* not used */ -+ nand->IO_ADDR_R = nand->IO_ADDR_W = (void *)~0L; -+ -+ if (bcmnand_reg_read(ctrl, NANDC_CONFIG_CHIP_WIDTH(0))) -+ nand->options |= NAND_BUSWIDTH_16; -+ nand->options |= NAND_SKIP_BBTSCAN; /* Dont need BBTs */ -+ -+ nand->options |= NAND_NO_SUBPAGE_WRITE; /* Subpages unsupported */ -+ -+ nand->dev_ready = bcmnand_dev_ready; -+ nand->read_byte = bcmnand_read_byte; -+ nand->read_word = bcmnand_read_word; -+ nand->select_chip = bcmnand_select_chip; -+ nand->cmdfunc = bcmnand_cmdfunc; -+ nand->waitfunc = bcmnand_waitfunc; -+ -+ nand->ecc.mode = NAND_ECC_HW; -+ nand->ecc.read_page_raw = bcmnand_read_page_raw; -+ nand->ecc.write_page_raw = bcmnand_write_page_raw; -+ nand->ecc.read_page = bcmnand_read_page_ecc; -+ nand->ecc.write_page = bcmnand_write_page_ecc; -+ nand->ecc.read_oob = bcmnand_read_oob; -+ nand->ecc.write_oob = bcmnand_write_oob; -+ -+ /* Set AUTO_CNFIG bit - try to auto-detect chips */ -+ bcmnand_reg_write(ctrl, NANDC_CS_AUTO_CONFIG, 1); -+ -+ usleep_range(1000, 1500); -+ -+ /* Print out current chip config */ -+ for (chip = 0; chip < NANDC_MAX_CHIPS; chip++) { -+ dev_dbg(dev, "chip[%d]: size=%#x block=%#x page=%#x ecc_level=%#x\n", -+ chip, -+ bcmnand_reg_read(ctrl, NANDC_CONFIG_CHIP_SIZE(chip)), -+ bcmnand_reg_read(ctrl, NANDC_CONFIG_BLK_SIZE(chip)), -+ bcmnand_reg_read(ctrl, NANDC_CONFIG_PAGE_SIZE(chip)), -+ bcmnand_reg_read(ctrl, NANDC_ACC_CTRL_ECC_LEVEL(chip))); -+ } -+ -+ dev_dbg(dev, "Nand controller is reads=%d\n", -+ bcmnand_reg_aread(ctrl, NANDC_IDM_IO_CTRL_RDY)); -+ -+ ret = bcmnand_scan(mtd); -+ if (ret) { -+ dev_err(dev, "scanning the nand flash chip failed with %i\n", -+ ret); -+ return ret; -+ } -+ -+ return 0; -+} -+ -+static int bcmnand_idm_init(struct bcmnand_ctrl *ctrl) -+{ -+ int irq_off; -+ unsigned int retries = 0x1000; -+ struct device *dev = &ctrl->core->dev; -+ -+ if (bcmnand_reg_aread(ctrl, NANDC_IDM_RESET)) -+ dev_info(dev, "stuck in reset\n"); -+ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_RESET, 1); -+ if (!bcmnand_reg_aread(ctrl, NANDC_IDM_RESET)) { -+ dev_err(dev, "reset of failed\n"); -+ return -EIO; -+ } -+ -+ while (bcmnand_reg_aread(ctrl, NANDC_IDM_RESET)) { -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_RESET, 0); -+ cpu_relax(); -+ usleep_range(100, 150); -+ if (!(retries--)) { -+ dev_err(dev, "did not came back from reset\n"); -+ return -ETIMEDOUT; -+ } -+ } -+ -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_CLOCK_EN, 1); -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_APB_LITTLE_ENDIAN, 0); -+ udelay(10); -+ -+ dev_info(dev, "NAND Controller rev %d.%02d\n", -+ bcmnand_reg_read(ctrl, NANDC_REV_MAJOR), -+ bcmnand_reg_read(ctrl, NANDC_REV_MINOR)); -+ -+ usleep_range(250, 350); -+ -+ /* Disable all IRQs */ -+ for (irq_off = 0; irq_off < NANDC_IRQ_NUM; irq_off++) -+ bcmnand_reg_awrite(ctrl, NANDC_IDM_IRQ_N_EN(irq_off), 0); -+ -+ return 0; -+} -+ -+static const char * const part_probes[] = { "ofpart", "bcm47xxpart", NULL }; -+ -+/* -+ * Top-level init function -+ */ -+static int bcmnand_probe(struct bcma_device *core) -+{ -+ struct mtd_part_parser_data parser_data; -+ struct device *dev = &core->dev; -+ struct bcmnand_ctrl *ctrl; -+ int res, i, irq; -+ -+ ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); -+ if (!ctrl) -+ return -ENOMEM; -+ -+ bcma_set_drvdata(core, ctrl); -+ -+ ctrl->mtd.dev.parent = &core->dev; -+ ctrl->core = core; -+ -+ /* Acquire all interrupt lines */ -+ for (i = 0; i < NANDC_IRQ_NUM; i++) { -+ irq = bcma_core_irq(core, i); -+ if (!irq) { -+ dev_err(dev, "IRQ idx %i not available\n", i); -+ return -ENOENT; -+ } -+ res = devm_request_irq(dev, irq, bcmnand_isr, 0, -+ KBUILD_MODNAME, ctrl); -+ if (res < 0) { -+ dev_err(dev, "problem requesting irq: %i (idx: %i)\n", -+ irq, i); -+ return res; -+ } -+ } -+ -+ res = bcmnand_idm_init(ctrl); -+ if (res) -+ return res; -+ -+ res = bcmnand_ctrl_init(ctrl); -+ if (res) -+ return res; -+ -+ parser_data.of_node = dev->of_node; -+ res = mtd_device_parse_register(&ctrl->mtd, part_probes, &parser_data, NULL, 0); -+ if (res) { -+ dev_err(dev, "Failed to register MTD device: %d\n", res); -+ return res; -+ } -+ return 0; -+} -+ -+static void bcmnand_remove(struct bcma_device *core) -+{ -+ struct bcmnand_ctrl *ctrl = bcma_get_drvdata(core); -+ -+ mtd_device_unregister(&ctrl->mtd); -+} -+ -+static const struct bcma_device_id bcmnand_bcma_tbl[] = { -+ BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_NS_NAND, BCMA_ANY_REV, BCMA_ANY_CLASS), -+ {}, -+}; -+MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl); -+ -+static struct bcma_driver bcmnand_bcma_driver = { -+ .name = KBUILD_MODNAME, -+ .id_table = bcmnand_bcma_tbl, -+ .probe = bcmnand_probe, -+ .remove = bcmnand_remove, -+}; -+ -+static int __init bcmnand_init(void) -+{ -+ return bcma_driver_register(&bcmnand_bcma_driver); -+} -+ -+static void __exit bcmnand_exit(void) -+{ -+ bcma_driver_unregister(&bcmnand_bcma_driver); -+} -+ -+module_init(bcmnand_init) -+module_exit(bcmnand_exit) -+ -+MODULE_LICENSE("GPL"); -+MODULE_AUTHOR("Hauke Mehrtens"); -+MODULE_DESCRIPTION("Northstar on-chip NAND Flash Controller driver"); 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