--- /dev/null
+/*
+ * Copyright © 2010-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
+#include <linux/ioport.h>
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/mm.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/of.h>
+#include <linux/of_mtd.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/log2.h>
+
+#include "brcmnand.h"
+
+/*
+ * This flag controls if WP stays on between erase/write commands to mitigate
+ * flash corruption due to power glitches. Values:
+ * 0: NAND_WP is not used or not available
+ * 1: NAND_WP is set by default, cleared for erase/write operations
+ * 2: NAND_WP is always cleared
+ */
+static int wp_on = 1;
+module_param(wp_on, int, 0444);
+
+/***********************************************************************
+ * Definitions
+ ***********************************************************************/
+
+#define DRV_NAME "brcmnand"
+
+#define CMD_NULL 0x00
+#define CMD_PAGE_READ 0x01
+#define CMD_SPARE_AREA_READ 0x02
+#define CMD_STATUS_READ 0x03
+#define CMD_PROGRAM_PAGE 0x04
+#define CMD_PROGRAM_SPARE_AREA 0x05
+#define CMD_COPY_BACK 0x06
+#define CMD_DEVICE_ID_READ 0x07
+#define CMD_BLOCK_ERASE 0x08
+#define CMD_FLASH_RESET 0x09
+#define CMD_BLOCKS_LOCK 0x0a
+#define CMD_BLOCKS_LOCK_DOWN 0x0b
+#define CMD_BLOCKS_UNLOCK 0x0c
+#define CMD_READ_BLOCKS_LOCK_STATUS 0x0d
+#define CMD_PARAMETER_READ 0x0e
+#define CMD_PARAMETER_CHANGE_COL 0x0f
+#define CMD_LOW_LEVEL_OP 0x10
+
+struct brcm_nand_dma_desc {
+ u32 next_desc;
+ u32 next_desc_ext;
+ u32 cmd_irq;
+ u32 dram_addr;
+ u32 dram_addr_ext;
+ u32 tfr_len;
+ u32 total_len;
+ u32 flash_addr;
+ u32 flash_addr_ext;
+ u32 cs;
+ u32 pad2[5];
+ u32 status_valid;
+} __packed;
+
+/* Bitfields for brcm_nand_dma_desc::status_valid */
+#define FLASH_DMA_ECC_ERROR (1 << 8)
+#define FLASH_DMA_CORR_ERROR (1 << 9)
+
+/* 512B flash cache in the NAND controller HW */
+#define FC_SHIFT 9U
+#define FC_BYTES 512U
+#define FC_WORDS (FC_BYTES >> 2)
+
+#define BRCMNAND_MIN_PAGESIZE 512
+#define BRCMNAND_MIN_BLOCKSIZE (8 * 1024)
+#define BRCMNAND_MIN_DEVSIZE (4ULL * 1024 * 1024)
+
+/* Controller feature flags */
+enum {
+ BRCMNAND_HAS_1K_SECTORS = BIT(0),
+ BRCMNAND_HAS_PREFETCH = BIT(1),
+ BRCMNAND_HAS_CACHE_MODE = BIT(2),
+ BRCMNAND_HAS_WP = BIT(3),
+};
+
+struct brcmnand_controller {
+ struct device *dev;
+ struct nand_hw_control controller;
+ void __iomem *nand_base;
+ void __iomem *nand_fc; /* flash cache */
+ void __iomem *flash_dma_base;
+ unsigned int irq;
+ unsigned int dma_irq;
+ int nand_version;
+
+ /* Some SoCs provide custom interrupt status register(s) */
+ struct brcmnand_soc *soc;
+
+ int cmd_pending;
+ bool dma_pending;
+ struct completion done;
+ struct completion dma_done;
+
+ /* List of NAND hosts (one for each chip-select) */
+ struct list_head host_list;
+
+ struct brcm_nand_dma_desc *dma_desc;
+ dma_addr_t dma_pa;
+
+ /* in-memory cache of the FLASH_CACHE, used only for some commands */
+ u32 flash_cache[FC_WORDS];
+
+ /* Controller revision details */
+ const u16 *reg_offsets;
+ unsigned int reg_spacing; /* between CS1, CS2, ... regs */
+ const u8 *cs_offsets; /* within each chip-select */
+ const u8 *cs0_offsets; /* within CS0, if different */
+ unsigned int max_block_size;
+ const unsigned int *block_sizes;
+ unsigned int max_page_size;
+ const unsigned int *page_sizes;
+ unsigned int max_oob;
+ u32 features;
+
+ /* for low-power standby/resume only */
+ u32 nand_cs_nand_select;
+ u32 nand_cs_nand_xor;
+ u32 corr_stat_threshold;
+ u32 flash_dma_mode;
+};
+
+struct brcmnand_cfg {
+ u64 device_size;
+ unsigned int block_size;
+ unsigned int page_size;
+ unsigned int spare_area_size;
+ unsigned int device_width;
+ unsigned int col_adr_bytes;
+ unsigned int blk_adr_bytes;
+ unsigned int ful_adr_bytes;
+ unsigned int sector_size_1k;
+ unsigned int ecc_level;
+ /* use for low-power standby/resume only */
+ u32 acc_control;
+ u32 config;
+ u32 config_ext;
+ u32 timing_1;
+ u32 timing_2;
+};
+
+struct brcmnand_host {
+ struct list_head node;
+ struct device_node *of_node;
+
+ struct nand_chip chip;
+ struct mtd_info mtd;
+ struct platform_device *pdev;
+ int cs;
+
+ unsigned int last_cmd;
+ unsigned int last_byte;
+ u64 last_addr;
+ struct brcmnand_cfg hwcfg;
+ struct brcmnand_controller *ctrl;
+};
+
+enum brcmnand_reg {
+ BRCMNAND_CMD_START = 0,
+ BRCMNAND_CMD_EXT_ADDRESS,
+ BRCMNAND_CMD_ADDRESS,
+ BRCMNAND_INTFC_STATUS,
+ BRCMNAND_CS_SELECT,
+ BRCMNAND_CS_XOR,
+ BRCMNAND_LL_OP,
+ BRCMNAND_CS0_BASE,
+ BRCMNAND_CS1_BASE, /* CS1 regs, if non-contiguous */
+ BRCMNAND_CORR_THRESHOLD,
+ BRCMNAND_CORR_THRESHOLD_EXT,
+ BRCMNAND_UNCORR_COUNT,
+ BRCMNAND_CORR_COUNT,
+ BRCMNAND_CORR_EXT_ADDR,
+ BRCMNAND_CORR_ADDR,
+ BRCMNAND_UNCORR_EXT_ADDR,
+ BRCMNAND_UNCORR_ADDR,
+ BRCMNAND_SEMAPHORE,
+ BRCMNAND_ID,
+ BRCMNAND_ID_EXT,
+ BRCMNAND_LL_RDATA,
+ BRCMNAND_OOB_READ_BASE,
+ BRCMNAND_OOB_READ_10_BASE, /* offset 0x10, if non-contiguous */
+ BRCMNAND_OOB_WRITE_BASE,
+ BRCMNAND_OOB_WRITE_10_BASE, /* offset 0x10, if non-contiguous */
+ BRCMNAND_FC_BASE,
+};
+
+/* BRCMNAND v4.0 */
+static const u16 brcmnand_regs_v40[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x6c,
+ [BRCMNAND_CS_SELECT] = 0x14,
+ [BRCMNAND_CS_XOR] = 0x18,
+ [BRCMNAND_LL_OP] = 0x178,
+ [BRCMNAND_CS0_BASE] = 0x40,
+ [BRCMNAND_CS1_BASE] = 0xd0,
+ [BRCMNAND_CORR_THRESHOLD] = 0x84,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0,
+ [BRCMNAND_UNCORR_COUNT] = 0,
+ [BRCMNAND_CORR_COUNT] = 0,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x70,
+ [BRCMNAND_CORR_ADDR] = 0x74,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x78,
+ [BRCMNAND_UNCORR_ADDR] = 0x7c,
+ [BRCMNAND_SEMAPHORE] = 0x58,
+ [BRCMNAND_ID] = 0x60,
+ [BRCMNAND_ID_EXT] = 0x64,
+ [BRCMNAND_LL_RDATA] = 0x17c,
+ [BRCMNAND_OOB_READ_BASE] = 0x20,
+ [BRCMNAND_OOB_READ_10_BASE] = 0x130,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x30,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0,
+ [BRCMNAND_FC_BASE] = 0x200,
+};
+
+/* BRCMNAND v5.0 */
+static const u16 brcmnand_regs_v50[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x6c,
+ [BRCMNAND_CS_SELECT] = 0x14,
+ [BRCMNAND_CS_XOR] = 0x18,
+ [BRCMNAND_LL_OP] = 0x178,
+ [BRCMNAND_CS0_BASE] = 0x40,
+ [BRCMNAND_CS1_BASE] = 0xd0,
+ [BRCMNAND_CORR_THRESHOLD] = 0x84,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0,
+ [BRCMNAND_UNCORR_COUNT] = 0,
+ [BRCMNAND_CORR_COUNT] = 0,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x70,
+ [BRCMNAND_CORR_ADDR] = 0x74,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x78,
+ [BRCMNAND_UNCORR_ADDR] = 0x7c,
+ [BRCMNAND_SEMAPHORE] = 0x58,
+ [BRCMNAND_ID] = 0x60,
+ [BRCMNAND_ID_EXT] = 0x64,
+ [BRCMNAND_LL_RDATA] = 0x17c,
+ [BRCMNAND_OOB_READ_BASE] = 0x20,
+ [BRCMNAND_OOB_READ_10_BASE] = 0x130,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x30,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0x140,
+ [BRCMNAND_FC_BASE] = 0x200,
+};
+
+/* BRCMNAND v6.0 - v7.1 */
+static const u16 brcmnand_regs_v60[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x14,
+ [BRCMNAND_CS_SELECT] = 0x18,
+ [BRCMNAND_CS_XOR] = 0x1c,
+ [BRCMNAND_LL_OP] = 0x20,
+ [BRCMNAND_CS0_BASE] = 0x50,
+ [BRCMNAND_CS1_BASE] = 0,
+ [BRCMNAND_CORR_THRESHOLD] = 0xc0,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0xc4,
+ [BRCMNAND_UNCORR_COUNT] = 0xfc,
+ [BRCMNAND_CORR_COUNT] = 0x100,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x10c,
+ [BRCMNAND_CORR_ADDR] = 0x110,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x114,
+ [BRCMNAND_UNCORR_ADDR] = 0x118,
+ [BRCMNAND_SEMAPHORE] = 0x150,
+ [BRCMNAND_ID] = 0x194,
+ [BRCMNAND_ID_EXT] = 0x198,
+ [BRCMNAND_LL_RDATA] = 0x19c,
+ [BRCMNAND_OOB_READ_BASE] = 0x200,
+ [BRCMNAND_OOB_READ_10_BASE] = 0,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x280,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0,
+ [BRCMNAND_FC_BASE] = 0x400,
+};
+
+enum brcmnand_cs_reg {
+ BRCMNAND_CS_CFG_EXT = 0,
+ BRCMNAND_CS_CFG,
+ BRCMNAND_CS_ACC_CONTROL,
+ BRCMNAND_CS_TIMING1,
+ BRCMNAND_CS_TIMING2,
+};
+
+/* Per chip-select offsets for v7.1 */
+static const u8 brcmnand_cs_offsets_v71[] = {
+ [BRCMNAND_CS_ACC_CONTROL] = 0x00,
+ [BRCMNAND_CS_CFG_EXT] = 0x04,
+ [BRCMNAND_CS_CFG] = 0x08,
+ [BRCMNAND_CS_TIMING1] = 0x0c,
+ [BRCMNAND_CS_TIMING2] = 0x10,
+};
+
+/* Per chip-select offsets for pre v7.1, except CS0 on <= v5.0 */
+static const u8 brcmnand_cs_offsets[] = {
+ [BRCMNAND_CS_ACC_CONTROL] = 0x00,
+ [BRCMNAND_CS_CFG_EXT] = 0x04,
+ [BRCMNAND_CS_CFG] = 0x04,
+ [BRCMNAND_CS_TIMING1] = 0x08,
+ [BRCMNAND_CS_TIMING2] = 0x0c,
+};
+
+/* Per chip-select offset for <= v5.0 on CS0 only */
+static const u8 brcmnand_cs_offsets_cs0[] = {
+ [BRCMNAND_CS_ACC_CONTROL] = 0x00,
+ [BRCMNAND_CS_CFG_EXT] = 0x08,
+ [BRCMNAND_CS_CFG] = 0x08,
+ [BRCMNAND_CS_TIMING1] = 0x10,
+ [BRCMNAND_CS_TIMING2] = 0x14,
+};
+
+/*
+ * Bitfields for the CFG and CFG_EXT registers. Pre-v7.1 controllers only had
+ * one config register, but once the bitfields overflowed, newer controllers
+ * (v7.1 and newer) added a CFG_EXT register and shuffled a few fields around.
+ */
+enum {
+ CFG_BLK_ADR_BYTES_SHIFT = 8,
+ CFG_COL_ADR_BYTES_SHIFT = 12,
+ CFG_FUL_ADR_BYTES_SHIFT = 16,
+ CFG_BUS_WIDTH_SHIFT = 23,
+ CFG_BUS_WIDTH = BIT(CFG_BUS_WIDTH_SHIFT),
+ CFG_DEVICE_SIZE_SHIFT = 24,
+
+ /* Only for pre-v7.1 (with no CFG_EXT register) */
+ CFG_PAGE_SIZE_SHIFT = 20,
+ CFG_BLK_SIZE_SHIFT = 28,
+
+ /* Only for v7.1+ (with CFG_EXT register) */
+ CFG_EXT_PAGE_SIZE_SHIFT = 0,
+ CFG_EXT_BLK_SIZE_SHIFT = 4,
+};
+
+/* BRCMNAND_INTFC_STATUS */
+enum {
+ INTFC_FLASH_STATUS = GENMASK(7, 0),
+
+ INTFC_ERASED = BIT(27),
+ INTFC_OOB_VALID = BIT(28),
+ INTFC_CACHE_VALID = BIT(29),
+ INTFC_FLASH_READY = BIT(30),
+ INTFC_CTLR_READY = BIT(31),
+};
+
+static inline u32 nand_readreg(struct brcmnand_controller *ctrl, u32 offs)
+{
+ return brcmnand_readl(ctrl->nand_base + offs);
+}
+
+static inline void nand_writereg(struct brcmnand_controller *ctrl, u32 offs,
+ u32 val)
+{
+ brcmnand_writel(val, ctrl->nand_base + offs);
+}
+
+static int brcmnand_revision_init(struct brcmnand_controller *ctrl)
+{
+ static const unsigned int block_sizes_v6[] = { 8, 16, 128, 256, 512, 1024, 2048, 0 };
+ static const unsigned int block_sizes_v4[] = { 16, 128, 8, 512, 256, 1024, 2048, 0 };
+ static const unsigned int page_sizes[] = { 512, 2048, 4096, 8192, 0 };
+
+ ctrl->nand_version = nand_readreg(ctrl, 0) & 0xffff;
+
+ /* Only support v4.0+? */
+ if (ctrl->nand_version < 0x0400) {
+ dev_err(ctrl->dev, "version %#x not supported\n",
+ ctrl->nand_version);
+ return -ENODEV;
+ }
+
+ /* Register offsets */
+ if (ctrl->nand_version >= 0x0600)
+ ctrl->reg_offsets = brcmnand_regs_v60;
+ else if (ctrl->nand_version >= 0x0500)
+ ctrl->reg_offsets = brcmnand_regs_v50;
+ else if (ctrl->nand_version >= 0x0400)
+ ctrl->reg_offsets = brcmnand_regs_v40;
+
+ /* Chip-select stride */
+ if (ctrl->nand_version >= 0x0701)
+ ctrl->reg_spacing = 0x14;
+ else
+ ctrl->reg_spacing = 0x10;
+
+ /* Per chip-select registers */
+ if (ctrl->nand_version >= 0x0701) {
+ ctrl->cs_offsets = brcmnand_cs_offsets_v71;
+ } else {
+ ctrl->cs_offsets = brcmnand_cs_offsets;
+
+ /* v5.0 and earlier has a different CS0 offset layout */
+ if (ctrl->nand_version <= 0x0500)
+ ctrl->cs0_offsets = brcmnand_cs_offsets_cs0;
+ }
+
+ /* Page / block sizes */
+ if (ctrl->nand_version >= 0x0701) {
+ /* >= v7.1 use nice power-of-2 values! */
+ ctrl->max_page_size = 16 * 1024;
+ ctrl->max_block_size = 2 * 1024 * 1024;
+ } else {
+ ctrl->page_sizes = page_sizes;
+ if (ctrl->nand_version >= 0x0600)
+ ctrl->block_sizes = block_sizes_v6;
+ else
+ ctrl->block_sizes = block_sizes_v4;
+
+ if (ctrl->nand_version < 0x0400) {
+ ctrl->max_page_size = 4096;
+ ctrl->max_block_size = 512 * 1024;
+ }
+ }
+
+ /* Maximum spare area sector size (per 512B) */
+ if (ctrl->nand_version >= 0x0600)
+ ctrl->max_oob = 64;
+ else if (ctrl->nand_version >= 0x0500)
+ ctrl->max_oob = 32;
+ else
+ ctrl->max_oob = 16;
+
+ /* v6.0 and newer (except v6.1) have prefetch support */
+ if (ctrl->nand_version >= 0x0600 && ctrl->nand_version != 0x0601)
+ ctrl->features |= BRCMNAND_HAS_PREFETCH;
+
+ /*
+ * v6.x has cache mode, but it's implemented differently. Ignore it for
+ * now.
+ */
+ if (ctrl->nand_version >= 0x0700)
+ ctrl->features |= BRCMNAND_HAS_CACHE_MODE;
+
+ if (ctrl->nand_version >= 0x0500)
+ ctrl->features |= BRCMNAND_HAS_1K_SECTORS;
+
+ if (ctrl->nand_version >= 0x0700)
+ ctrl->features |= BRCMNAND_HAS_WP;
+ else if (of_property_read_bool(ctrl->dev->of_node, "brcm,nand-has-wp"))
+ ctrl->features |= BRCMNAND_HAS_WP;
+
+ return 0;
+}
+
+static inline u32 brcmnand_read_reg(struct brcmnand_controller *ctrl,
+ enum brcmnand_reg reg)
+{
+ u16 offs = ctrl->reg_offsets[reg];
+
+ if (offs)
+ return nand_readreg(ctrl, offs);
+ else
+ return 0;
+}
+
+static inline void brcmnand_write_reg(struct brcmnand_controller *ctrl,
+ enum brcmnand_reg reg, u32 val)
+{
+ u16 offs = ctrl->reg_offsets[reg];
+
+ if (offs)
+ nand_writereg(ctrl, offs, val);
+}
+
+static inline void brcmnand_rmw_reg(struct brcmnand_controller *ctrl,
+ enum brcmnand_reg reg, u32 mask, unsigned
+ int shift, u32 val)
+{
+ u32 tmp = brcmnand_read_reg(ctrl, reg);
+
+ tmp &= ~mask;
+ tmp |= val << shift;
+ brcmnand_write_reg(ctrl, reg, tmp);
+}
+
+static inline u32 brcmnand_read_fc(struct brcmnand_controller *ctrl, int word)
+{
+ return __raw_readl(ctrl->nand_fc + word * 4);
+}
+
+static inline void brcmnand_write_fc(struct brcmnand_controller *ctrl,
+ int word, u32 val)
+{
+ __raw_writel(val, ctrl->nand_fc + word * 4);
+}
+
+static inline u16 brcmnand_cs_offset(struct brcmnand_controller *ctrl, int cs,
+ enum brcmnand_cs_reg reg)
+{
+ u16 offs_cs0 = ctrl->reg_offsets[BRCMNAND_CS0_BASE];
+ u16 offs_cs1 = ctrl->reg_offsets[BRCMNAND_CS1_BASE];
+ u8 cs_offs;
+
+ if (cs == 0 && ctrl->cs0_offsets)
+ cs_offs = ctrl->cs0_offsets[reg];
+ else
+ cs_offs = ctrl->cs_offsets[reg];
+
+ if (cs && offs_cs1)
+ return offs_cs1 + (cs - 1) * ctrl->reg_spacing + cs_offs;
+
+ return offs_cs0 + cs * ctrl->reg_spacing + cs_offs;
+}
+
+static inline u32 brcmnand_count_corrected(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version < 0x0600)
+ return 1;
+ return brcmnand_read_reg(ctrl, BRCMNAND_CORR_COUNT);
+}
+
+static void brcmnand_wr_corr_thresh(struct brcmnand_host *host, u8 val)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned int shift = 0, bits;
+ enum brcmnand_reg reg = BRCMNAND_CORR_THRESHOLD;
+ int cs = host->cs;
+
+ if (ctrl->nand_version >= 0x0600)
+ bits = 6;
+ else if (ctrl->nand_version >= 0x0500)
+ bits = 5;
+ else
+ bits = 4;
+
+ if (ctrl->nand_version >= 0x0600) {
+ if (cs >= 5)
+ reg = BRCMNAND_CORR_THRESHOLD_EXT;
+ shift = (cs % 5) * bits;
+ }
+ brcmnand_rmw_reg(ctrl, reg, (bits - 1) << shift, shift, val);
+}
+
+static inline int brcmnand_cmd_shift(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version < 0x0700)
+ return 24;
+ return 0;
+}
+
+/***********************************************************************
+ * NAND ACC CONTROL bitfield
+ *
+ * Some bits have remained constant throughout hardware revision, while
+ * others have shifted around.
+ ***********************************************************************/
+
+/* Constant for all versions (where supported) */
+enum {
+ /* See BRCMNAND_HAS_CACHE_MODE */
+ ACC_CONTROL_CACHE_MODE = BIT(22),
+
+ /* See BRCMNAND_HAS_PREFETCH */
+ ACC_CONTROL_PREFETCH = BIT(23),
+
+ ACC_CONTROL_PAGE_HIT = BIT(24),
+ ACC_CONTROL_WR_PREEMPT = BIT(25),
+ ACC_CONTROL_PARTIAL_PAGE = BIT(26),
+ ACC_CONTROL_RD_ERASED = BIT(27),
+ ACC_CONTROL_FAST_PGM_RDIN = BIT(28),
+ ACC_CONTROL_WR_ECC = BIT(30),
+ ACC_CONTROL_RD_ECC = BIT(31),
+};
+
+static inline u32 brcmnand_spare_area_mask(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version >= 0x0600)
+ return GENMASK(6, 0);
+ else
+ return GENMASK(5, 0);
+}
+
+#define NAND_ACC_CONTROL_ECC_SHIFT 16
+
+static inline u32 brcmnand_ecc_level_mask(struct brcmnand_controller *ctrl)
+{
+ u32 mask = (ctrl->nand_version >= 0x0600) ? 0x1f : 0x0f;
+
+ return mask << NAND_ACC_CONTROL_ECC_SHIFT;
+}
+
+static void brcmnand_set_ecc_enabled(struct brcmnand_host *host, int en)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u16 offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_ACC_CONTROL);
+ u32 acc_control = nand_readreg(ctrl, offs);
+ u32 ecc_flags = ACC_CONTROL_WR_ECC | ACC_CONTROL_RD_ECC;
+
+ if (en) {
+ acc_control |= ecc_flags; /* enable RD/WR ECC */
+ acc_control |= host->hwcfg.ecc_level
+ << NAND_ACC_CONTROL_ECC_SHIFT;
+ } else {
+ acc_control &= ~ecc_flags; /* disable RD/WR ECC */
+ acc_control &= ~brcmnand_ecc_level_mask(ctrl);
+ }
+
+ nand_writereg(ctrl, offs, acc_control);
+}
+
+static inline int brcmnand_sector_1k_shift(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version >= 0x0600)
+ return 7;
+ else if (ctrl->nand_version >= 0x0500)
+ return 6;
+ else
+ return -1;
+}
+
+static int brcmnand_get_sector_size_1k(struct brcmnand_host *host)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ int shift = brcmnand_sector_1k_shift(ctrl);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+
+ if (shift < 0)
+ return 0;
+
+ return (nand_readreg(ctrl, acc_control_offs) >> shift) & 0x1;
+}
+
+static void brcmnand_set_sector_size_1k(struct brcmnand_host *host, int val)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ int shift = brcmnand_sector_1k_shift(ctrl);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+ u32 tmp;
+
+ if (shift < 0)
+ return;
+
+ tmp = nand_readreg(ctrl, acc_control_offs);
+ tmp &= ~(1 << shift);
+ tmp |= (!!val) << shift;
+ nand_writereg(ctrl, acc_control_offs, tmp);
+}
+
+/***********************************************************************
+ * CS_NAND_SELECT
+ ***********************************************************************/
+
+enum {
+ CS_SELECT_NAND_WP = BIT(29),
+ CS_SELECT_AUTO_DEVICE_ID_CFG = BIT(30),
+};
+
+static inline void brcmnand_set_wp(struct brcmnand_controller *ctrl, bool en)
+{
+ u32 val = en ? CS_SELECT_NAND_WP : 0;
+
+ brcmnand_rmw_reg(ctrl, BRCMNAND_CS_SELECT, CS_SELECT_NAND_WP, 0, val);
+}
+
+/***********************************************************************
+ * Flash DMA
+ ***********************************************************************/
+
+enum flash_dma_reg {
+ FLASH_DMA_REVISION = 0x00,
+ FLASH_DMA_FIRST_DESC = 0x04,
+ FLASH_DMA_FIRST_DESC_EXT = 0x08,
+ FLASH_DMA_CTRL = 0x0c,
+ FLASH_DMA_MODE = 0x10,
+ FLASH_DMA_STATUS = 0x14,
+ FLASH_DMA_INTERRUPT_DESC = 0x18,
+ FLASH_DMA_INTERRUPT_DESC_EXT = 0x1c,
+ FLASH_DMA_ERROR_STATUS = 0x20,
+ FLASH_DMA_CURRENT_DESC = 0x24,
+ FLASH_DMA_CURRENT_DESC_EXT = 0x28,
+};
+
+static inline bool has_flash_dma(struct brcmnand_controller *ctrl)
+{
+ return ctrl->flash_dma_base;
+}
+
+static inline bool flash_dma_buf_ok(const void *buf)
+{
+ return buf && !is_vmalloc_addr(buf) &&
+ likely(IS_ALIGNED((uintptr_t)buf, 4));
+}
+
+static inline void flash_dma_writel(struct brcmnand_controller *ctrl, u8 offs,
+ u32 val)
+{
+ brcmnand_writel(val, ctrl->flash_dma_base + offs);
+}
+
+static inline u32 flash_dma_readl(struct brcmnand_controller *ctrl, u8 offs)
+{
+ return brcmnand_readl(ctrl->flash_dma_base + offs);
+}
+
+/* Low-level operation types: command, address, write, or read */
+enum brcmnand_llop_type {
+ LL_OP_CMD,
+ LL_OP_ADDR,
+ LL_OP_WR,
+ LL_OP_RD,
+};
+
+/***********************************************************************
+ * Internal support functions
+ ***********************************************************************/
+
+static inline bool is_hamming_ecc(struct brcmnand_cfg *cfg)
+{
+ return cfg->sector_size_1k == 0 && cfg->spare_area_size == 16 &&
+ cfg->ecc_level == 15;
+}
+
+/*
+ * Returns a nand_ecclayout strucutre for the given layout/configuration.
+ * Returns NULL on failure.
+ */
+static struct nand_ecclayout *brcmnand_create_layout(int ecc_level,
+ struct brcmnand_host *host)
+{
+ struct brcmnand_cfg *cfg = &host->hwcfg;
+ int i, j;
+ struct nand_ecclayout *layout;
+ int req;
+ int sectors;
+ int sas;
+ int idx1, idx2;
+
+ layout = devm_kzalloc(&host->pdev->dev, sizeof(*layout), GFP_KERNEL);
+ if (!layout)
+ return NULL;
+
+ sectors = cfg->page_size / (512 << cfg->sector_size_1k);
+ sas = cfg->spare_area_size << cfg->sector_size_1k;
+
+ /* Hamming */
+ if (is_hamming_ecc(cfg)) {
+ for (i = 0, idx1 = 0, idx2 = 0; i < sectors; i++) {
+ /* First sector of each page may have BBI */
+ if (i == 0) {
+ layout->oobfree[idx2].offset = i * sas + 1;
+ /* Small-page NAND use byte 6 for BBI */
+ if (cfg->page_size == 512)
+ layout->oobfree[idx2].offset--;
+ layout->oobfree[idx2].length = 5;
+ } else {
+ layout->oobfree[idx2].offset = i * sas;
+ layout->oobfree[idx2].length = 6;
+ }
+ idx2++;
+ layout->eccpos[idx1++] = i * sas + 6;
+ layout->eccpos[idx1++] = i * sas + 7;
+ layout->eccpos[idx1++] = i * sas + 8;
+ layout->oobfree[idx2].offset = i * sas + 9;
+ layout->oobfree[idx2].length = 7;
+ idx2++;
+ /* Leave zero-terminated entry for OOBFREE */
+ if (idx1 >= MTD_MAX_ECCPOS_ENTRIES_LARGE ||
+ idx2 >= MTD_MAX_OOBFREE_ENTRIES_LARGE - 1)
+ break;
+ }
+ goto out;
+ }
+
+ /*
+ * CONTROLLER_VERSION:
+ * < v5.0: ECC_REQ = ceil(BCH_T * 13/8)
+ * >= v5.0: ECC_REQ = ceil(BCH_T * 14/8)
+ * But we will just be conservative.
+ */
+ req = DIV_ROUND_UP(ecc_level * 14, 8);
+ if (req >= sas) {
+ dev_err(&host->pdev->dev,
+ "error: ECC too large for OOB (ECC bytes %d, spare sector %d)\n",
+ req, sas);
+ return NULL;
+ }
+
+ layout->eccbytes = req * sectors;
+ for (i = 0, idx1 = 0, idx2 = 0; i < sectors; i++) {
+ for (j = sas - req; j < sas && idx1 <
+ MTD_MAX_ECCPOS_ENTRIES_LARGE; j++, idx1++)
+ layout->eccpos[idx1] = i * sas + j;
+
+ /* First sector of each page may have BBI */
+ if (i == 0) {
+ if (cfg->page_size == 512 && (sas - req >= 6)) {
+ /* Small-page NAND use byte 6 for BBI */
+ layout->oobfree[idx2].offset = 0;
+ layout->oobfree[idx2].length = 5;
+ idx2++;
+ if (sas - req > 6) {
+ layout->oobfree[idx2].offset = 6;
+ layout->oobfree[idx2].length =
+ sas - req - 6;
+ idx2++;
+ }
+ } else if (sas > req + 1) {
+ layout->oobfree[idx2].offset = i * sas + 1;
+ layout->oobfree[idx2].length = sas - req - 1;
+ idx2++;
+ }
+ } else if (sas > req) {
+ layout->oobfree[idx2].offset = i * sas;
+ layout->oobfree[idx2].length = sas - req;
+ idx2++;
+ }
+ /* Leave zero-terminated entry for OOBFREE */
+ if (idx1 >= MTD_MAX_ECCPOS_ENTRIES_LARGE ||
+ idx2 >= MTD_MAX_OOBFREE_ENTRIES_LARGE - 1)
+ break;
+ }
+out:
+ /* Sum available OOB */
+ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE; i++)
+ layout->oobavail += layout->oobfree[i].length;
+ return layout;
+}
+
+static struct nand_ecclayout *brcmstb_choose_ecc_layout(
+ struct brcmnand_host *host)
+{
+ struct nand_ecclayout *layout;
+ struct brcmnand_cfg *p = &host->hwcfg;
+ unsigned int ecc_level = p->ecc_level;
+
+ if (p->sector_size_1k)
+ ecc_level <<= 1;
+
+ layout = brcmnand_create_layout(ecc_level, host);
+ if (!layout) {
+ dev_err(&host->pdev->dev,
+ "no proper ecc_layout for this NAND cfg\n");
+ return NULL;
+ }
+
+ return layout;
+}
+
+static void brcmnand_wp(struct mtd_info *mtd, int wp)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+
+ if ((ctrl->features & BRCMNAND_HAS_WP) && wp_on == 1) {
+ static int old_wp = -1;
+
+ if (old_wp != wp) {
+ dev_dbg(ctrl->dev, "WP %s\n", wp ? "on" : "off");
+ old_wp = wp;
+ }
+ brcmnand_set_wp(ctrl, wp);
+ }
+}
+
+/* Helper functions for reading and writing OOB registers */
+static inline u8 oob_reg_read(struct brcmnand_controller *ctrl, u32 offs)
+{
+ u16 offset0, offset10, reg_offs;
+
+ offset0 = ctrl->reg_offsets[BRCMNAND_OOB_READ_BASE];
+ offset10 = ctrl->reg_offsets[BRCMNAND_OOB_READ_10_BASE];
+
+ if (offs >= ctrl->max_oob)
+ return 0x77;
+
+ if (offs >= 16 && offset10)
+ reg_offs = offset10 + ((offs - 0x10) & ~0x03);
+ else
+ reg_offs = offset0 + (offs & ~0x03);
+
+ return nand_readreg(ctrl, reg_offs) >> (24 - ((offs & 0x03) << 3));
+}
+
+static inline void oob_reg_write(struct brcmnand_controller *ctrl, u32 offs,
+ u32 data)
+{
+ u16 offset0, offset10, reg_offs;
+
+ offset0 = ctrl->reg_offsets[BRCMNAND_OOB_WRITE_BASE];
+ offset10 = ctrl->reg_offsets[BRCMNAND_OOB_WRITE_10_BASE];
+
+ if (offs >= ctrl->max_oob)
+ return;
+
+ if (offs >= 16 && offset10)
+ reg_offs = offset10 + ((offs - 0x10) & ~0x03);
+ else
+ reg_offs = offset0 + (offs & ~0x03);
+
+ nand_writereg(ctrl, reg_offs, data);
+}
+
+/*
+ * read_oob_from_regs - read data from OOB registers
+ * @ctrl: NAND controller
+ * @i: sub-page sector index
+ * @oob: buffer to read to
+ * @sas: spare area sector size (i.e., OOB size per FLASH_CACHE)
+ * @sector_1k: 1 for 1KiB sectors, 0 for 512B, other values are illegal
+ */
+static int read_oob_from_regs(struct brcmnand_controller *ctrl, int i, u8 *oob,
+ int sas, int sector_1k)
+{
+ int tbytes = sas << sector_1k;
+ int j;
+
+ /* Adjust OOB values for 1K sector size */
+ if (sector_1k && (i & 0x01))
+ tbytes = max(0, tbytes - (int)ctrl->max_oob);
+ tbytes = min_t(int, tbytes, ctrl->max_oob);
+
+ for (j = 0; j < tbytes; j++)
+ oob[j] = oob_reg_read(ctrl, j);
+ return tbytes;
+}
+
+/*
+ * write_oob_to_regs - write data to OOB registers
+ * @i: sub-page sector index
+ * @oob: buffer to write from
+ * @sas: spare area sector size (i.e., OOB size per FLASH_CACHE)
+ * @sector_1k: 1 for 1KiB sectors, 0 for 512B, other values are illegal
+ */
+static int write_oob_to_regs(struct brcmnand_controller *ctrl, int i,
+ const u8 *oob, int sas, int sector_1k)
+{
+ int tbytes = sas << sector_1k;
+ int j;
+
+ /* Adjust OOB values for 1K sector size */
+ if (sector_1k && (i & 0x01))
+ tbytes = max(0, tbytes - (int)ctrl->max_oob);
+ tbytes = min_t(int, tbytes, ctrl->max_oob);
+
+ for (j = 0; j < tbytes; j += 4)
+ oob_reg_write(ctrl, j,
+ (oob[j + 0] << 24) |
+ (oob[j + 1] << 16) |
+ (oob[j + 2] << 8) |
+ (oob[j + 3] << 0));
+ return tbytes;
+}
+
+static irqreturn_t brcmnand_ctlrdy_irq(int irq, void *data)
+{
+ struct brcmnand_controller *ctrl = data;
+
+ /* Discard all NAND_CTLRDY interrupts during DMA */
+ if (ctrl->dma_pending)
+ return IRQ_HANDLED;
+
+ complete(&ctrl->done);
+ return IRQ_HANDLED;
+}
+
+/* Handle SoC-specific interrupt hardware */
+static irqreturn_t brcmnand_irq(int irq, void *data)
+{
+ struct brcmnand_controller *ctrl = data;
+
+ if (ctrl->soc->ctlrdy_ack(ctrl->soc))
+ return brcmnand_ctlrdy_irq(irq, data);
+
+ return IRQ_NONE;
+}
+
+static irqreturn_t brcmnand_dma_irq(int irq, void *data)
+{
+ struct brcmnand_controller *ctrl = data;
+
+ complete(&ctrl->dma_done);
+
+ return IRQ_HANDLED;
+}
+
+static void brcmnand_send_cmd(struct brcmnand_host *host, int cmd)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u32 intfc;
+
+ dev_dbg(ctrl->dev, "send native cmd %d addr_lo 0x%x\n", cmd,
+ brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS));
+ BUG_ON(ctrl->cmd_pending != 0);
+ ctrl->cmd_pending = cmd;
+
+ intfc = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS);
+ BUG_ON(!(intfc & INTFC_CTLR_READY));
+
+ mb(); /* flush previous writes */
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_START,
+ cmd << brcmnand_cmd_shift(ctrl));
+}
+
+/***********************************************************************
+ * NAND MTD API: read/program/erase
+ ***********************************************************************/
+
+static void brcmnand_cmd_ctrl(struct mtd_info *mtd, int dat,
+ unsigned int ctrl)
+{
+ /* intentionally left blank */
+}
+
+static int brcmnand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned long timeo = msecs_to_jiffies(100);
+
+ dev_dbg(ctrl->dev, "wait on native cmd %d\n", ctrl->cmd_pending);
+ if (ctrl->cmd_pending &&
+ wait_for_completion_timeout(&ctrl->done, timeo) <= 0) {
+ u32 cmd = brcmnand_read_reg(ctrl, BRCMNAND_CMD_START)
+ >> brcmnand_cmd_shift(ctrl);
+
+ dev_err_ratelimited(ctrl->dev,
+ "timeout waiting for command %#02x\n", cmd);
+ dev_err_ratelimited(ctrl->dev, "intfc status %08x\n",
+ brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS));
+ }
+ ctrl->cmd_pending = 0;
+ return brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) &
+ INTFC_FLASH_STATUS;
+}
+
+enum {
+ LLOP_RE = BIT(16),
+ LLOP_WE = BIT(17),
+ LLOP_ALE = BIT(18),
+ LLOP_CLE = BIT(19),
+ LLOP_RETURN_IDLE = BIT(31),
+
+ LLOP_DATA_MASK = GENMASK(15, 0),
+};
+
+static int brcmnand_low_level_op(struct brcmnand_host *host,
+ enum brcmnand_llop_type type, u32 data,
+ bool last_op)
+{
+ struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *chip = &host->chip;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u32 tmp;
+
+ tmp = data & LLOP_DATA_MASK;
+ switch (type) {
+ case LL_OP_CMD:
+ tmp |= LLOP_WE | LLOP_CLE;
+ break;
+ case LL_OP_ADDR:
+ /* WE | ALE */
+ tmp |= LLOP_WE | LLOP_ALE;
+ break;
+ case LL_OP_WR:
+ /* WE */
+ tmp |= LLOP_WE;
+ break;
+ case LL_OP_RD:
+ /* RE */
+ tmp |= LLOP_RE;
+ break;
+ }
+ if (last_op)
+ /* RETURN_IDLE */
+ tmp |= LLOP_RETURN_IDLE;
+
+ dev_dbg(ctrl->dev, "ll_op cmd %#x\n", tmp);
+
+ brcmnand_write_reg(ctrl, BRCMNAND_LL_OP, tmp);
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_LL_OP);
+
+ brcmnand_send_cmd(host, CMD_LOW_LEVEL_OP);
+ return brcmnand_waitfunc(mtd, chip);
+}
+
+static void brcmnand_cmdfunc(struct mtd_info *mtd, unsigned command,
+ int column, int page_addr)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u64 addr = (u64)page_addr << chip->page_shift;
+ int native_cmd = 0;
+
+ if (command == NAND_CMD_READID || command == NAND_CMD_PARAM ||
+ command == NAND_CMD_RNDOUT)
+ addr = (u64)column;
+ /* Avoid propagating a negative, don't-care address */
+ else if (page_addr < 0)
+ addr = 0;
+
+ dev_dbg(ctrl->dev, "cmd 0x%x addr 0x%llx\n", command,
+ (unsigned long long)addr);
+
+ host->last_cmd = command;
+ host->last_byte = 0;
+ host->last_addr = addr;
+
+ switch (command) {
+ case NAND_CMD_RESET:
+ native_cmd = CMD_FLASH_RESET;
+ break;
+ case NAND_CMD_STATUS:
+ native_cmd = CMD_STATUS_READ;
+ break;
+ case NAND_CMD_READID:
+ native_cmd = CMD_DEVICE_ID_READ;
+ break;
+ case NAND_CMD_READOOB:
+ native_cmd = CMD_SPARE_AREA_READ;
+ break;
+ case NAND_CMD_ERASE1:
+ native_cmd = CMD_BLOCK_ERASE;
+ brcmnand_wp(mtd, 0);
+ break;
+ case NAND_CMD_PARAM:
+ native_cmd = CMD_PARAMETER_READ;
+ break;
+ case NAND_CMD_SET_FEATURES:
+ case NAND_CMD_GET_FEATURES:
+ brcmnand_low_level_op(host, LL_OP_CMD, command, false);
+ brcmnand_low_level_op(host, LL_OP_ADDR, column, false);
+ break;
+ case NAND_CMD_RNDOUT:
+ native_cmd = CMD_PARAMETER_CHANGE_COL;
+ addr &= ~((u64)(FC_BYTES - 1));
+ /*
+ * HW quirk: PARAMETER_CHANGE_COL requires SECTOR_SIZE_1K=0
+ * NB: hwcfg.sector_size_1k may not be initialized yet
+ */
+ if (brcmnand_get_sector_size_1k(host)) {
+ host->hwcfg.sector_size_1k =
+ brcmnand_get_sector_size_1k(host);
+ brcmnand_set_sector_size_1k(host, 0);
+ }
+ break;
+ }
+
+ if (!native_cmd)
+ return;
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS,
+ (host->cs << 16) | ((addr >> 32) & 0xffff));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS);
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS, lower_32_bits(addr));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
+
+ brcmnand_send_cmd(host, native_cmd);
+ brcmnand_waitfunc(mtd, chip);
+
+ if (native_cmd == CMD_PARAMETER_READ ||
+ native_cmd == CMD_PARAMETER_CHANGE_COL) {
+ int i;
+
+ brcmnand_soc_data_bus_prepare(ctrl->soc);
+
+ /*
+ * Must cache the FLASH_CACHE now, since changes in
+ * SECTOR_SIZE_1K may invalidate it
+ */
+ for (i = 0; i < FC_WORDS; i++)
+ ctrl->flash_cache[i] = brcmnand_read_fc(ctrl, i);
+
+ brcmnand_soc_data_bus_unprepare(ctrl->soc);
+
+ /* Cleanup from HW quirk: restore SECTOR_SIZE_1K */
+ if (host->hwcfg.sector_size_1k)
+ brcmnand_set_sector_size_1k(host,
+ host->hwcfg.sector_size_1k);
+ }
+
+ /* Re-enable protection is necessary only after erase */
+ if (command == NAND_CMD_ERASE1)
+ brcmnand_wp(mtd, 1);
+}
+
+static uint8_t brcmnand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ uint8_t ret = 0;
+ int addr, offs;
+
+ switch (host->last_cmd) {
+ case NAND_CMD_READID:
+ if (host->last_byte < 4)
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_ID) >>
+ (24 - (host->last_byte << 3));
+ else if (host->last_byte < 8)
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_ID_EXT) >>
+ (56 - (host->last_byte << 3));
+ break;
+
+ case NAND_CMD_READOOB:
+ ret = oob_reg_read(ctrl, host->last_byte);
+ break;
+
+ case NAND_CMD_STATUS:
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) &
+ INTFC_FLASH_STATUS;
+ if (wp_on) /* hide WP status */
+ ret |= NAND_STATUS_WP;
+ break;
+
+ case NAND_CMD_PARAM:
+ case NAND_CMD_RNDOUT:
+ addr = host->last_addr + host->last_byte;
+ offs = addr & (FC_BYTES - 1);
+
+ /* At FC_BYTES boundary, switch to next column */
+ if (host->last_byte > 0 && offs == 0)
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, addr, -1);
+
+ ret = ctrl->flash_cache[offs >> 2] >>
+ (24 - ((offs & 0x03) << 3));
+ break;
+ case NAND_CMD_GET_FEATURES:
+ if (host->last_byte >= ONFI_SUBFEATURE_PARAM_LEN) {
+ ret = 0;
+ } else {
+ bool last = host->last_byte ==
+ ONFI_SUBFEATURE_PARAM_LEN - 1;
+ brcmnand_low_level_op(host, LL_OP_RD, 0, last);
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_LL_RDATA) & 0xff;
+ }
+ }
+
+ dev_dbg(ctrl->dev, "read byte = 0x%02x\n", ret);
+ host->last_byte++;
+
+ return ret;
+}
+
+static void brcmnand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++, buf++)
+ *buf = brcmnand_read_byte(mtd);
+}
+
+static void brcmnand_write_buf(struct mtd_info *mtd, const uint8_t *buf,
+ int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+
+ switch (host->last_cmd) {
+ case NAND_CMD_SET_FEATURES:
+ for (i = 0; i < len; i++)
+ brcmnand_low_level_op(host, LL_OP_WR, buf[i],
+ (i + 1) == len);
+ break;
+ default:
+ BUG();
+ break;
+ }
+}
+
+/**
+ * Construct a FLASH_DMA descriptor as part of a linked list. You must know the
+ * following ahead of time:
+ * - Is this descriptor the beginning or end of a linked list?
+ * - What is the (DMA) address of the next descriptor in the linked list?
+ */
+static int brcmnand_fill_dma_desc(struct brcmnand_host *host,
+ struct brcm_nand_dma_desc *desc, u64 addr,
+ dma_addr_t buf, u32 len, u8 dma_cmd,
+ bool begin, bool end,
+ dma_addr_t next_desc)
+{
+ memset(desc, 0, sizeof(*desc));
+ /* Descriptors are written in native byte order (wordwise) */
+ desc->next_desc = lower_32_bits(next_desc);
+ desc->next_desc_ext = upper_32_bits(next_desc);
+ desc->cmd_irq = (dma_cmd << 24) |
+ (end ? (0x03 << 8) : 0) | /* IRQ | STOP */
+ (!!begin) | ((!!end) << 1); /* head, tail */
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ desc->cmd_irq |= 0x01 << 12;
+#endif
+ desc->dram_addr = lower_32_bits(buf);
+ desc->dram_addr_ext = upper_32_bits(buf);
+ desc->tfr_len = len;
+ desc->total_len = len;
+ desc->flash_addr = lower_32_bits(addr);
+ desc->flash_addr_ext = upper_32_bits(addr);
+ desc->cs = host->cs;
+ desc->status_valid = 0x01;
+ return 0;
+}
+
+/**
+ * Kick the FLASH_DMA engine, with a given DMA descriptor
+ */
+static void brcmnand_dma_run(struct brcmnand_host *host, dma_addr_t desc)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned long timeo = msecs_to_jiffies(100);
+
+ flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC, lower_32_bits(desc));
+ (void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC);
+ flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC_EXT, upper_32_bits(desc));
+ (void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC_EXT);
+
+ /* Start FLASH_DMA engine */
+ ctrl->dma_pending = true;
+ mb(); /* flush previous writes */
+ flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0x03); /* wake | run */
+
+ if (wait_for_completion_timeout(&ctrl->dma_done, timeo) <= 0) {
+ dev_err(ctrl->dev,
+ "timeout waiting for DMA; status %#x, error status %#x\n",
+ flash_dma_readl(ctrl, FLASH_DMA_STATUS),
+ flash_dma_readl(ctrl, FLASH_DMA_ERROR_STATUS));
+ }
+ ctrl->dma_pending = false;
+ flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0); /* force stop */
+}
+
+static int brcmnand_dma_trans(struct brcmnand_host *host, u64 addr, u32 *buf,
+ u32 len, u8 dma_cmd)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ dma_addr_t buf_pa;
+ int dir = dma_cmd == CMD_PAGE_READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+ buf_pa = dma_map_single(ctrl->dev, buf, len, dir);
+ if (dma_mapping_error(ctrl->dev, buf_pa)) {
+ dev_err(ctrl->dev, "unable to map buffer for DMA\n");
+ return -ENOMEM;
+ }
+
+ brcmnand_fill_dma_desc(host, ctrl->dma_desc, addr, buf_pa, len,
+ dma_cmd, true, true, 0);
+
+ brcmnand_dma_run(host, ctrl->dma_pa);
+
+ dma_unmap_single(ctrl->dev, buf_pa, len, dir);
+
+ if (ctrl->dma_desc->status_valid & FLASH_DMA_ECC_ERROR)
+ return -EBADMSG;
+ else if (ctrl->dma_desc->status_valid & FLASH_DMA_CORR_ERROR)
+ return -EUCLEAN;
+
+ return 0;
+}
+
+/*
+ * Assumes proper CS is already set
+ */
+static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip,
+ u64 addr, unsigned int trans, u32 *buf,
+ u8 *oob, u64 *err_addr)
+{
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ int i, j, ret = 0;
+
+ /* Clear error addresses */
+ brcmnand_write_reg(ctrl, BRCMNAND_UNCORR_ADDR, 0);
+ brcmnand_write_reg(ctrl, BRCMNAND_CORR_ADDR, 0);
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS,
+ (host->cs << 16) | ((addr >> 32) & 0xffff));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS);
+
+ for (i = 0; i < trans; i++, addr += FC_BYTES) {
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS,
+ lower_32_bits(addr));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
+ /* SPARE_AREA_READ does not use ECC, so just use PAGE_READ */
+ brcmnand_send_cmd(host, CMD_PAGE_READ);
+ brcmnand_waitfunc(mtd, chip);
+
+ if (likely(buf)) {
+ brcmnand_soc_data_bus_prepare(ctrl->soc);
+
+ for (j = 0; j < FC_WORDS; j++, buf++)
+ *buf = brcmnand_read_fc(ctrl, j);
+
+ brcmnand_soc_data_bus_unprepare(ctrl->soc);
+ }
+
+ if (oob)
+ oob += read_oob_from_regs(ctrl, i, oob,
+ mtd->oobsize / trans,
+ host->hwcfg.sector_size_1k);
+
+ if (!ret) {
+ *err_addr = brcmnand_read_reg(ctrl,
+ BRCMNAND_UNCORR_ADDR) |
+ ((u64)(brcmnand_read_reg(ctrl,
+ BRCMNAND_UNCORR_EXT_ADDR)
+ & 0xffff) << 32);
+ if (*err_addr)
+ ret = -EBADMSG;
+ }
+
+ if (!ret) {
+ *err_addr = brcmnand_read_reg(ctrl,
+ BRCMNAND_CORR_ADDR) |
+ ((u64)(brcmnand_read_reg(ctrl,
+ BRCMNAND_CORR_EXT_ADDR)
+ & 0xffff) << 32);
+ if (*err_addr)
+ ret = -EUCLEAN;
+ }
+ }
+
+ return ret;
+}
+
+static int brcmnand_read(struct mtd_info *mtd, struct nand_chip *chip,
+ u64 addr, unsigned int trans, u32 *buf, u8 *oob)
+{
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u64 err_addr = 0;
+ int err;
+
+ dev_dbg(ctrl->dev, "read %llx -> %p\n", (unsigned long long)addr, buf);
+
+ brcmnand_write_reg(ctrl, BRCMNAND_UNCORR_COUNT, 0);
+
+ if (has_flash_dma(ctrl) && !oob && flash_dma_buf_ok(buf)) {
+ err = brcmnand_dma_trans(host, addr, buf, trans * FC_BYTES,
+ CMD_PAGE_READ);
+ if (err) {
+ if (mtd_is_bitflip_or_eccerr(err))
+ err_addr = addr;
+ else
+ return -EIO;
+ }
+ } else {
+ if (oob)
+ memset(oob, 0x99, mtd->oobsize);
+
+ err = brcmnand_read_by_pio(mtd, chip, addr, trans, buf,
+ oob, &err_addr);
+ }
+
+ if (mtd_is_eccerr(err)) {
+ dev_dbg(ctrl->dev, "uncorrectable error at 0x%llx\n",
+ (unsigned long long)err_addr);
+ mtd->ecc_stats.failed++;
+ /* NAND layer expects zero on ECC errors */
+ return 0;
+ }
+
+ if (mtd_is_bitflip(err)) {
+ unsigned int corrected = brcmnand_count_corrected(ctrl);
+
+ dev_dbg(ctrl->dev, "corrected error at 0x%llx\n",
+ (unsigned long long)err_addr);
+ mtd->ecc_stats.corrected += corrected;
+ /* Always exceed the software-imposed threshold */
+ return max(mtd->bitflip_threshold, corrected);
+ }
+
+ return 0;
+}
+
+static int brcmnand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int oob_required, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL;
+
+ return brcmnand_read(mtd, chip, host->last_addr,
+ mtd->writesize >> FC_SHIFT, (u32 *)buf, oob);
+}
+
+static int brcmnand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int oob_required, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL;
+ int ret;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ ret = brcmnand_read(mtd, chip, host->last_addr,
+ mtd->writesize >> FC_SHIFT, (u32 *)buf, oob);
+ brcmnand_set_ecc_enabled(host, 1);
+ return ret;
+}
+
+static int brcmnand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ return brcmnand_read(mtd, chip, (u64)page << chip->page_shift,
+ mtd->writesize >> FC_SHIFT,
+ NULL, (u8 *)chip->oob_poi);
+}
+
+static int brcmnand_read_oob_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ struct brcmnand_host *host = chip->priv;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ brcmnand_read(mtd, chip, (u64)page << chip->page_shift,
+ mtd->writesize >> FC_SHIFT,
+ NULL, (u8 *)chip->oob_poi);
+ brcmnand_set_ecc_enabled(host, 1);
+ return 0;
+}
+
+static int brcmnand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
+ uint32_t data_offs, uint32_t readlen,
+ uint8_t *bufpoi, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+
+ return brcmnand_read(mtd, chip, host->last_addr + data_offs,
+ readlen >> FC_SHIFT, (u32 *)bufpoi, NULL);
+}
+
+static int brcmnand_write(struct mtd_info *mtd, struct nand_chip *chip,
+ u64 addr, const u32 *buf, u8 *oob)
+{
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned int i, j, trans = mtd->writesize >> FC_SHIFT;
+ int status, ret = 0;
+
+ dev_dbg(ctrl->dev, "write %llx <- %p\n", (unsigned long long)addr, buf);
+
+ if (unlikely((unsigned long)buf & 0x03)) {
+ dev_warn(ctrl->dev, "unaligned buffer: %p\n", buf);
+ buf = (u32 *)((unsigned long)buf & ~0x03);
+ }
+
+ brcmnand_wp(mtd, 0);
+
+ for (i = 0; i < ctrl->max_oob; i += 4)
+ oob_reg_write(ctrl, i, 0xffffffff);
+
+ if (has_flash_dma(ctrl) && !oob && flash_dma_buf_ok(buf)) {
+ if (brcmnand_dma_trans(host, addr, (u32 *)buf,
+ mtd->writesize, CMD_PROGRAM_PAGE))
+ ret = -EIO;
+ goto out;
+ }
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS,
+ (host->cs << 16) | ((addr >> 32) & 0xffff));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS);
+
+ for (i = 0; i < trans; i++, addr += FC_BYTES) {
+ /* full address MUST be set before populating FC */
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS,
+ lower_32_bits(addr));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
+
+ if (buf) {
+ brcmnand_soc_data_bus_prepare(ctrl->soc);
+
+ for (j = 0; j < FC_WORDS; j++, buf++)
+ brcmnand_write_fc(ctrl, j, *buf);
+
+ brcmnand_soc_data_bus_unprepare(ctrl->soc);
+ } else if (oob) {
+ for (j = 0; j < FC_WORDS; j++)
+ brcmnand_write_fc(ctrl, j, 0xffffffff);
+ }
+
+ if (oob) {
+ oob += write_oob_to_regs(ctrl, i, oob,
+ mtd->oobsize / trans,
+ host->hwcfg.sector_size_1k);
+ }
+
+ /* we cannot use SPARE_AREA_PROGRAM when PARTIAL_PAGE_EN=0 */
+ brcmnand_send_cmd(host, CMD_PROGRAM_PAGE);
+ status = brcmnand_waitfunc(mtd, chip);
+
+ if (status & NAND_STATUS_FAIL) {
+ dev_info(ctrl->dev, "program failed at %llx\n",
+ (unsigned long long)addr);
+ ret = -EIO;
+ goto out;
+ }
+ }
+out:
+ brcmnand_wp(mtd, 1);
+ return ret;
+}
+
+static int brcmnand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf, int oob_required, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ void *oob = oob_required ? chip->oob_poi : NULL;
+
+ brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob);
+ return 0;
+}
+
+static int brcmnand_write_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf,
+ int oob_required, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ void *oob = oob_required ? chip->oob_poi : NULL;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob);
+ brcmnand_set_ecc_enabled(host, 1);
+ return 0;
+}
+
+static int brcmnand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ return brcmnand_write(mtd, chip, (u64)page << chip->page_shift,
+ NULL, chip->oob_poi);
+}
+
+static int brcmnand_write_oob_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ int ret;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ ret = brcmnand_write(mtd, chip, (u64)page << chip->page_shift, NULL,
+ (u8 *)chip->oob_poi);
+ brcmnand_set_ecc_enabled(host, 1);
+
+ return ret;
+}
+
+/***********************************************************************
+ * Per-CS setup (1 NAND device)
+ ***********************************************************************/
+
+static int brcmnand_set_cfg(struct brcmnand_host *host,
+ struct brcmnand_cfg *cfg)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ struct nand_chip *chip = &host->chip;
+ u16 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG);
+ u16 cfg_ext_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_CFG_EXT);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+ u8 block_size = 0, page_size = 0, device_size = 0;
+ u32 tmp;
+
+ if (ctrl->block_sizes) {
+ int i, found;
+
+ for (i = 0, found = 0; ctrl->block_sizes[i]; i++)
+ if (ctrl->block_sizes[i] * 1024 == cfg->block_size) {
+ block_size = i;
+ found = 1;
+ }
+ if (!found) {
+ dev_warn(ctrl->dev, "invalid block size %u\n",
+ cfg->block_size);
+ return -EINVAL;
+ }
+ } else {
+ block_size = ffs(cfg->block_size) - ffs(BRCMNAND_MIN_BLOCKSIZE);
+ }
+
+ if (cfg->block_size < BRCMNAND_MIN_BLOCKSIZE || (ctrl->max_block_size &&
+ cfg->block_size > ctrl->max_block_size)) {
+ dev_warn(ctrl->dev, "invalid block size %u\n",
+ cfg->block_size);
+ block_size = 0;
+ }
+
+ if (ctrl->page_sizes) {
+ int i, found;
+
+ for (i = 0, found = 0; ctrl->page_sizes[i]; i++)
+ if (ctrl->page_sizes[i] == cfg->page_size) {
+ page_size = i;
+ found = 1;
+ }
+ if (!found) {
+ dev_warn(ctrl->dev, "invalid page size %u\n",
+ cfg->page_size);
+ return -EINVAL;
+ }
+ } else {
+ page_size = ffs(cfg->page_size) - ffs(BRCMNAND_MIN_PAGESIZE);
+ }
+
+ if (cfg->page_size < BRCMNAND_MIN_PAGESIZE || (ctrl->max_page_size &&
+ cfg->page_size > ctrl->max_page_size)) {
+ dev_warn(ctrl->dev, "invalid page size %u\n", cfg->page_size);
+ return -EINVAL;
+ }
+
+ if (fls64(cfg->device_size) < fls64(BRCMNAND_MIN_DEVSIZE)) {
+ dev_warn(ctrl->dev, "invalid device size 0x%llx\n",
+ (unsigned long long)cfg->device_size);
+ return -EINVAL;
+ }
+ device_size = fls64(cfg->device_size) - fls64(BRCMNAND_MIN_DEVSIZE);
+
+ tmp = (cfg->blk_adr_bytes << CFG_BLK_ADR_BYTES_SHIFT) |
+ (cfg->col_adr_bytes << CFG_COL_ADR_BYTES_SHIFT) |
+ (cfg->ful_adr_bytes << CFG_FUL_ADR_BYTES_SHIFT) |
+ (!!(cfg->device_width == 16) << CFG_BUS_WIDTH_SHIFT) |
+ (device_size << CFG_DEVICE_SIZE_SHIFT);
+ if (cfg_offs == cfg_ext_offs) {
+ tmp |= (page_size << CFG_PAGE_SIZE_SHIFT) |
+ (block_size << CFG_BLK_SIZE_SHIFT);
+ nand_writereg(ctrl, cfg_offs, tmp);
+ } else {
+ nand_writereg(ctrl, cfg_offs, tmp);
+ tmp = (page_size << CFG_EXT_PAGE_SIZE_SHIFT) |
+ (block_size << CFG_EXT_BLK_SIZE_SHIFT);
+ nand_writereg(ctrl, cfg_ext_offs, tmp);
+ }
+
+ tmp = nand_readreg(ctrl, acc_control_offs);
+ tmp &= ~brcmnand_ecc_level_mask(ctrl);
+ tmp |= cfg->ecc_level << NAND_ACC_CONTROL_ECC_SHIFT;
+ tmp &= ~brcmnand_spare_area_mask(ctrl);
+ tmp |= cfg->spare_area_size;
+ nand_writereg(ctrl, acc_control_offs, tmp);
+
+ brcmnand_set_sector_size_1k(host, cfg->sector_size_1k);
+
+ /* threshold = ceil(BCH-level * 0.75) */
+ brcmnand_wr_corr_thresh(host, DIV_ROUND_UP(chip->ecc.strength * 3, 4));
+
+ return 0;
+}
+
+static void brcmnand_print_cfg(char *buf, struct brcmnand_cfg *cfg)
+{
+ buf += sprintf(buf,
+ "%lluMiB total, %uKiB blocks, %u%s pages, %uB OOB, %u-bit",
+ (unsigned long long)cfg->device_size >> 20,
+ cfg->block_size >> 10,
+ cfg->page_size >= 1024 ? cfg->page_size >> 10 : cfg->page_size,
+ cfg->page_size >= 1024 ? "KiB" : "B",
+ cfg->spare_area_size, cfg->device_width);
+
+ /* Account for Hamming ECC and for BCH 512B vs 1KiB sectors */
+ if (is_hamming_ecc(cfg))
+ sprintf(buf, ", Hamming ECC");
+ else if (cfg->sector_size_1k)
+ sprintf(buf, ", BCH-%u (1KiB sector)", cfg->ecc_level << 1);
+ else
+ sprintf(buf, ", BCH-%u", cfg->ecc_level);
+}
+
+/*
+ * Minimum number of bytes to address a page. Calculated as:
+ * roundup(log2(size / page-size) / 8)
+ *
+ * NB: the following does not "round up" for non-power-of-2 'size'; but this is
+ * OK because many other things will break if 'size' is irregular...
+ */
+static inline int get_blk_adr_bytes(u64 size, u32 writesize)
+{
+ return ALIGN(ilog2(size) - ilog2(writesize), 8) >> 3;
+}
+
+static int brcmnand_setup_dev(struct brcmnand_host *host)
+{
+ struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *chip = &host->chip;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ struct brcmnand_cfg *cfg = &host->hwcfg;
+ char msg[128];
+ u32 offs, tmp, oob_sector;
+ int ret;
+
+ memset(cfg, 0, sizeof(*cfg));
+
+ ret = of_property_read_u32(chip->flash_node,
+ "brcm,nand-oob-sector-size",
+ &oob_sector);
+ if (ret) {
+ /* Use detected size */
+ cfg->spare_area_size = mtd->oobsize /
+ (mtd->writesize >> FC_SHIFT);
+ } else {
+ cfg->spare_area_size = oob_sector;
+ }
+ if (cfg->spare_area_size > ctrl->max_oob)
+ cfg->spare_area_size = ctrl->max_oob;
+ /*
+ * Set oobsize to be consistent with controller's spare_area_size, as
+ * the rest is inaccessible.
+ */
+ mtd->oobsize = cfg->spare_area_size * (mtd->writesize >> FC_SHIFT);
+
+ cfg->device_size = mtd->size;
+ cfg->block_size = mtd->erasesize;
+ cfg->page_size = mtd->writesize;
+ cfg->device_width = (chip->options & NAND_BUSWIDTH_16) ? 16 : 8;
+ cfg->col_adr_bytes = 2;
+ cfg->blk_adr_bytes = get_blk_adr_bytes(mtd->size, mtd->writesize);
+
+ switch (chip->ecc.size) {
+ case 512:
+ if (chip->ecc.strength == 1) /* Hamming */
+ cfg->ecc_level = 15;
+ else
+ cfg->ecc_level = chip->ecc.strength;
+ cfg->sector_size_1k = 0;
+ break;
+ case 1024:
+ if (!(ctrl->features & BRCMNAND_HAS_1K_SECTORS)) {
+ dev_err(ctrl->dev, "1KB sectors not supported\n");
+ return -EINVAL;
+ }
+ if (chip->ecc.strength & 0x1) {
+ dev_err(ctrl->dev,
+ "odd ECC not supported with 1KB sectors\n");
+ return -EINVAL;
+ }
+
+ cfg->ecc_level = chip->ecc.strength >> 1;
+ cfg->sector_size_1k = 1;
+ break;
+ default:
+ dev_err(ctrl->dev, "unsupported ECC size: %d\n",
+ chip->ecc.size);
+ return -EINVAL;
+ }
+
+ cfg->ful_adr_bytes = cfg->blk_adr_bytes;
+ if (mtd->writesize > 512)
+ cfg->ful_adr_bytes += cfg->col_adr_bytes;
+ else
+ cfg->ful_adr_bytes += 1;
+
+ ret = brcmnand_set_cfg(host, cfg);
+ if (ret)
+ return ret;
+
+ brcmnand_set_ecc_enabled(host, 1);
+
+ brcmnand_print_cfg(msg, cfg);
+ dev_info(ctrl->dev, "detected %s\n", msg);
+
+ /* Configure ACC_CONTROL */
+ offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_ACC_CONTROL);
+ tmp = nand_readreg(ctrl, offs);
+ tmp &= ~ACC_CONTROL_PARTIAL_PAGE;
+ tmp &= ~ACC_CONTROL_RD_ERASED;
+ tmp &= ~ACC_CONTROL_FAST_PGM_RDIN;
+ if (ctrl->features & BRCMNAND_HAS_PREFETCH) {
+ /*
+ * FIXME: Flash DMA + prefetch may see spurious erased-page ECC
+ * errors
+ */
+ if (has_flash_dma(ctrl))
+ tmp &= ~ACC_CONTROL_PREFETCH;
+ else
+ tmp |= ACC_CONTROL_PREFETCH;
+ }
+ nand_writereg(ctrl, offs, tmp);
+
+ return 0;
+}
+
+static int brcmnand_init_cs(struct brcmnand_host *host)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ struct device_node *dn = host->of_node;
+ struct platform_device *pdev = host->pdev;
+ struct mtd_info *mtd;
+ struct nand_chip *chip;
+ int ret;
+ u16 cfg_offs;
+ struct mtd_part_parser_data ppdata = { .of_node = dn };
+
+ ret = of_property_read_u32(dn, "reg", &host->cs);
+ if (ret) {
+ dev_err(&pdev->dev, "can't get chip-select\n");
+ return -ENXIO;
+ }
+
+ mtd = &host->mtd;
+ chip = &host->chip;
+
+ chip->flash_node = dn;
+ chip->priv = host;
+ mtd->priv = chip;
+ mtd->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "brcmnand.%d",
+ host->cs);
+ mtd->owner = THIS_MODULE;
+ mtd->dev.parent = &pdev->dev;
+
+ chip->IO_ADDR_R = (void __iomem *)0xdeadbeef;
+ chip->IO_ADDR_W = (void __iomem *)0xdeadbeef;
+
+ chip->cmd_ctrl = brcmnand_cmd_ctrl;
+ chip->cmdfunc = brcmnand_cmdfunc;
+ chip->waitfunc = brcmnand_waitfunc;
+ chip->read_byte = brcmnand_read_byte;
+ chip->read_buf = brcmnand_read_buf;
+ chip->write_buf = brcmnand_write_buf;
+
+ chip->ecc.mode = NAND_ECC_HW;
+ chip->ecc.read_page = brcmnand_read_page;
+ chip->ecc.read_subpage = brcmnand_read_subpage;
+ chip->ecc.write_page = brcmnand_write_page;
+ chip->ecc.read_page_raw = brcmnand_read_page_raw;
+ chip->ecc.write_page_raw = brcmnand_write_page_raw;
+ chip->ecc.write_oob_raw = brcmnand_write_oob_raw;
+ chip->ecc.read_oob_raw = brcmnand_read_oob_raw;
+ chip->ecc.read_oob = brcmnand_read_oob;
+ chip->ecc.write_oob = brcmnand_write_oob;
+
+ chip->controller = &ctrl->controller;
+
+ /*
+ * The bootloader might have configured 16bit mode but
+ * NAND READID command only works in 8bit mode. We force
+ * 8bit mode here to ensure that NAND READID commands works.
+ */
+ cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG);
+ nand_writereg(ctrl, cfg_offs,
+ nand_readreg(ctrl, cfg_offs) & ~CFG_BUS_WIDTH);
+
+ if (nand_scan_ident(mtd, 1, NULL))
+ return -ENXIO;
+
+ chip->options |= NAND_NO_SUBPAGE_WRITE;
+ /*
+ * Avoid (for instance) kmap()'d buffers from JFFS2, which we can't DMA
+ * to/from, and have nand_base pass us a bounce buffer instead, as
+ * needed.
+ */
+ chip->options |= NAND_USE_BOUNCE_BUFFER;
+
+ if (of_get_nand_on_flash_bbt(dn))
+ chip->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
+
+ if (brcmnand_setup_dev(host))
+ return -ENXIO;
+
+ chip->ecc.size = host->hwcfg.sector_size_1k ? 1024 : 512;
+ /* only use our internal HW threshold */
+ mtd->bitflip_threshold = 1;
+
+ chip->ecc.layout = brcmstb_choose_ecc_layout(host);
+ if (!chip->ecc.layout)
+ return -ENXIO;
+
+ if (nand_scan_tail(mtd))
+ return -ENXIO;
+
+ return mtd_device_parse_register(mtd, NULL, &ppdata, NULL, 0);
+}
+
+static void brcmnand_save_restore_cs_config(struct brcmnand_host *host,
+ int restore)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u16 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG);
+ u16 cfg_ext_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_CFG_EXT);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+ u16 t1_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_TIMING1);
+ u16 t2_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_TIMING2);
+
+ if (restore) {
+ nand_writereg(ctrl, cfg_offs, host->hwcfg.config);
+ if (cfg_offs != cfg_ext_offs)
+ nand_writereg(ctrl, cfg_ext_offs,
+ host->hwcfg.config_ext);
+ nand_writereg(ctrl, acc_control_offs, host->hwcfg.acc_control);
+ nand_writereg(ctrl, t1_offs, host->hwcfg.timing_1);
+ nand_writereg(ctrl, t2_offs, host->hwcfg.timing_2);
+ } else {
+ host->hwcfg.config = nand_readreg(ctrl, cfg_offs);
+ if (cfg_offs != cfg_ext_offs)
+ host->hwcfg.config_ext =
+ nand_readreg(ctrl, cfg_ext_offs);
+ host->hwcfg.acc_control = nand_readreg(ctrl, acc_control_offs);
+ host->hwcfg.timing_1 = nand_readreg(ctrl, t1_offs);
+ host->hwcfg.timing_2 = nand_readreg(ctrl, t2_offs);
+ }
+}
+
+static int brcmnand_suspend(struct device *dev)
+{
+ struct brcmnand_controller *ctrl = dev_get_drvdata(dev);
+ struct brcmnand_host *host;
+
+ list_for_each_entry(host, &ctrl->host_list, node)
+ brcmnand_save_restore_cs_config(host, 0);
+
+ ctrl->nand_cs_nand_select = brcmnand_read_reg(ctrl, BRCMNAND_CS_SELECT);
+ ctrl->nand_cs_nand_xor = brcmnand_read_reg(ctrl, BRCMNAND_CS_XOR);
+ ctrl->corr_stat_threshold =
+ brcmnand_read_reg(ctrl, BRCMNAND_CORR_THRESHOLD);
+
+ if (has_flash_dma(ctrl))
+ ctrl->flash_dma_mode = flash_dma_readl(ctrl, FLASH_DMA_MODE);
+
+ return 0;
+}
+
+static int brcmnand_resume(struct device *dev)
+{
+ struct brcmnand_controller *ctrl = dev_get_drvdata(dev);
+ struct brcmnand_host *host;
+
+ if (has_flash_dma(ctrl)) {
+ flash_dma_writel(ctrl, FLASH_DMA_MODE, ctrl->flash_dma_mode);
+ flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0);
+ }
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CS_SELECT, ctrl->nand_cs_nand_select);
+ brcmnand_write_reg(ctrl, BRCMNAND_CS_XOR, ctrl->nand_cs_nand_xor);
+ brcmnand_write_reg(ctrl, BRCMNAND_CORR_THRESHOLD,
+ ctrl->corr_stat_threshold);
+ if (ctrl->soc) {
+ /* Clear/re-enable interrupt */
+ ctrl->soc->ctlrdy_ack(ctrl->soc);
+ ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
+ }
+
+ list_for_each_entry(host, &ctrl->host_list, node) {
+ struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *chip = mtd->priv;
+
+ brcmnand_save_restore_cs_config(host, 1);
+
+ /* Reset the chip, required by some chips after power-up */
+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ }
+
+ return 0;
+}
+
+const struct dev_pm_ops brcmnand_pm_ops = {
+ .suspend = brcmnand_suspend,
+ .resume = brcmnand_resume,
+};
+EXPORT_SYMBOL_GPL(brcmnand_pm_ops);
+
+static const struct of_device_id brcmnand_of_match[] = {
+ { .compatible = "brcm,brcmnand-v4.0" },
+ { .compatible = "brcm,brcmnand-v5.0" },
+ { .compatible = "brcm,brcmnand-v6.0" },
+ { .compatible = "brcm,brcmnand-v6.1" },
+ { .compatible = "brcm,brcmnand-v7.0" },
+ { .compatible = "brcm,brcmnand-v7.1" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcmnand_of_match);
+
+/***********************************************************************
+ * Platform driver setup (per controller)
+ ***********************************************************************/
+
+int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *dn = dev->of_node, *child;
+ struct brcmnand_controller *ctrl;
+ struct resource *res;
+ int ret;
+
+ /* We only support device-tree instantiation */
+ if (!dn)
+ return -ENODEV;
+
+ if (!of_match_node(brcmnand_of_match, dn))
+ return -ENODEV;
+
+ ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, ctrl);
+ ctrl->dev = dev;
+
+ init_completion(&ctrl->done);
+ init_completion(&ctrl->dma_done);
+ spin_lock_init(&ctrl->controller.lock);
+ init_waitqueue_head(&ctrl->controller.wq);
+ INIT_LIST_HEAD(&ctrl->host_list);
+
+ /* NAND register range */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctrl->nand_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->nand_base))
+ return PTR_ERR(ctrl->nand_base);
+
+ /* Initialize NAND revision */
+ ret = brcmnand_revision_init(ctrl);
+ if (ret)
+ return ret;
+
+ /*
+ * Most chips have this cache at a fixed offset within 'nand' block.
+ * Some must specify this region separately.
+ */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-cache");
+ if (res) {
+ ctrl->nand_fc = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->nand_fc))
+ return PTR_ERR(ctrl->nand_fc);
+ } else {
+ ctrl->nand_fc = ctrl->nand_base +
+ ctrl->reg_offsets[BRCMNAND_FC_BASE];
+ }
+
+ /* FLASH_DMA */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "flash-dma");
+ if (res) {
+ ctrl->flash_dma_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->flash_dma_base))
+ return PTR_ERR(ctrl->flash_dma_base);
+
+ flash_dma_writel(ctrl, FLASH_DMA_MODE, 1); /* linked-list */
+ flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0);
+
+ /* Allocate descriptor(s) */
+ ctrl->dma_desc = dmam_alloc_coherent(dev,
+ sizeof(*ctrl->dma_desc),
+ &ctrl->dma_pa, GFP_KERNEL);
+ if (!ctrl->dma_desc)
+ return -ENOMEM;
+
+ ctrl->dma_irq = platform_get_irq(pdev, 1);
+ if ((int)ctrl->dma_irq < 0) {
+ dev_err(dev, "missing FLASH_DMA IRQ\n");
+ return -ENODEV;
+ }
+
+ ret = devm_request_irq(dev, ctrl->dma_irq,
+ brcmnand_dma_irq, 0, DRV_NAME,
+ ctrl);
+ if (ret < 0) {
+ dev_err(dev, "can't allocate IRQ %d: error %d\n",
+ ctrl->dma_irq, ret);
+ return ret;
+ }
+
+ dev_info(dev, "enabling FLASH_DMA\n");
+ }
+
+ /* Disable automatic device ID config, direct addressing */
+ brcmnand_rmw_reg(ctrl, BRCMNAND_CS_SELECT,
+ CS_SELECT_AUTO_DEVICE_ID_CFG | 0xff, 0, 0);
+ /* Disable XOR addressing */
+ brcmnand_rmw_reg(ctrl, BRCMNAND_CS_XOR, 0xff, 0, 0);
+
+ if (ctrl->features & BRCMNAND_HAS_WP) {
+ /* Permanently disable write protection */
+ if (wp_on == 2)
+ brcmnand_set_wp(ctrl, false);
+ } else {
+ wp_on = 0;
+ }
+
+ /* IRQ */
+ ctrl->irq = platform_get_irq(pdev, 0);
+ if ((int)ctrl->irq < 0) {
+ dev_err(dev, "no IRQ defined\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Some SoCs integrate this controller (e.g., its interrupt bits) in
+ * interesting ways
+ */
+ if (soc) {
+ ctrl->soc = soc;
+
+ ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0,
+ DRV_NAME, ctrl);
+
+ /* Enable interrupt */
+ ctrl->soc->ctlrdy_ack(ctrl->soc);
+ ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
+ } else {
+ /* Use standard interrupt infrastructure */
+ ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0,
+ DRV_NAME, ctrl);
+ }
+ if (ret < 0) {
+ dev_err(dev, "can't allocate IRQ %d: error %d\n",
+ ctrl->irq, ret);
+ return ret;
+ }
+
+ for_each_available_child_of_node(dn, child) {
+ if (of_device_is_compatible(child, "brcm,nandcs")) {
+ struct brcmnand_host *host;
+
+ host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+ host->pdev = pdev;
+ host->ctrl = ctrl;
+ host->of_node = child;
+
+ ret = brcmnand_init_cs(host);
+ if (ret)
+ continue; /* Try all chip-selects */
+
+ list_add_tail(&host->node, &ctrl->host_list);
+ }
+ }
+
+ /* No chip-selects could initialize properly */
+ if (list_empty(&ctrl->host_list))
+ return -ENODEV;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(brcmnand_probe);
+
+int brcmnand_remove(struct platform_device *pdev)
+{
+ struct brcmnand_controller *ctrl = dev_get_drvdata(&pdev->dev);
+ struct brcmnand_host *host;
+
+ list_for_each_entry(host, &ctrl->host_list, node)
+ nand_release(&host->mtd);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(brcmnand_remove);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Kevin Cernekee");
+MODULE_AUTHOR("Brian Norris");
+MODULE_DESCRIPTION("NAND driver for Broadcom chips");
+MODULE_ALIAS("platform:brcmnand");
Code Review / kvmfornfv.git / blobdiff