lkml.org 
[lkml]   [2018]   [Jun]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] mtd: rawnand: meson: add support for Amlogic NAND flash controller
Date
From: Liang Yang <liang.yang@amlogic.com>

Add initial support for the Amlogic NAND flash controller which found
in the Meson-GXBB/GXL/AXG SoCs.

Singed-off-by: Liang Yang <liang.yang@amlogic.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
---
drivers/mtd/nand/raw/Kconfig | 8 +
drivers/mtd/nand/raw/Makefile | 3 +
drivers/mtd/nand/raw/meson_nand.c | 1422 +++++++++++++++++++++++++++++
3 files changed, 1433 insertions(+)
create mode 100644 drivers/mtd/nand/raw/meson_nand.c

diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index 19a2b283fbbe..b3c17a3ca8f4 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -534,4 +534,12 @@ config MTD_NAND_MTK
Enables support for NAND controller on MTK SoCs.
This controller is found on mt27xx, mt81xx, mt65xx SoCs.

+config MTD_NAND_MESON
+ tristate "Support for NAND flash controller on Amlogic's Meson SoCs"
+ depends on ARCH_MESON || COMPILE_TEST
+ select COMMON_CLK_REGMAP_MESON
+ select MFD_SYSCON
+ help
+ Enables support for NAND controller on Amlogic's Meson SoCs.
+
endif # MTD_NAND
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index 165b7ef9e9a1..cdf6162f38c3 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -1,5 +1,7 @@
# SPDX-License-Identifier: GPL-2.0

+ccflags-$(CONFIG_MTD_NAND_MESON) += -I$(srctree)/drivers/clk/meson
+
obj-$(CONFIG_MTD_NAND) += nand.o
obj-$(CONFIG_MTD_NAND_ECC) += nand_ecc.o
obj-$(CONFIG_MTD_NAND_BCH) += nand_bch.o
@@ -56,6 +58,7 @@ obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o
obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/
obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o
obj-$(CONFIG_MTD_NAND_MTK) += mtk_ecc.o mtk_nand.o
+obj-$(CONFIG_MTD_NAND_MESON) += meson_nand.o

nand-objs := nand_base.o nand_bbt.o nand_timings.o nand_ids.o
nand-objs += nand_amd.o
diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
new file mode 100644
index 000000000000..28abc3684772
--- /dev/null
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -0,0 +1,1422 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Amlogic Meson Nand Flash Controller Driver
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Liang Yang <liang.yang@amlogic.com>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/mtd/rawnand.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/module.h>
+#include <linux/iopoll.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include "clk-regmap.h"
+
+#define NFC_REG_CMD 0x00
+#define NFC_REG_CFG 0x04
+#define NFC_REG_DADR 0x08
+#define NFC_REG_IADR 0x0c
+#define NFC_REG_BUF 0x10
+#define NFC_REG_INFO 0x14
+#define NFC_REG_DC 0x18
+#define NFC_REG_ADR 0x1c
+#define NFC_REG_DL 0x20
+#define NFC_REG_DH 0x24
+#define NFC_REG_CADR 0x28
+#define NFC_REG_SADR 0x2c
+#define NFC_REG_PINS 0x30
+#define NFC_REG_VER 0x38
+
+
+#define NFC_CMD_DRD (0x8 << 14)
+#define NFC_CMD_IDLE (0xc << 14)
+#define NFC_CMD_DWR (0x4 << 14)
+#define NFC_CMD_CLE (0x5 << 14)
+#define NFC_CMD_ALE (0x6 << 14)
+#define NFC_CMD_ADL ((0 << 16) | (3 << 20))
+#define NFC_CMD_ADH ((1 << 16) | (3 << 20))
+#define NFC_CMD_AIL ((2 << 16) | (3 << 20))
+#define NFC_CMD_AIH ((3 << 16) | (3 << 20))
+#define NFC_CMD_SEED ((8 << 16) | (3 << 20))
+#define NFC_CMD_M2N ((0 << 17) | (2 << 20))
+#define NFC_CMD_N2M ((1 << 17) | (2 << 20))
+#define NFC_CMD_RB (1 << 20)
+#define NFC_CMD_IO6 ((0xb << 10) | (1 << 18))
+
+#define NFC_RB_USED (1 << 23)
+#define NFC_LARGE_PAGE (1 << 22)
+#define NFC_RW_OPS (2 << 20)
+
+#define NAND_TWB_TIME_CYCLE 10
+
+#define CMDRWGEN(cmd_dir, ran, bch, short_mode, page_size, pages) \
+ ( \
+ (cmd_dir) | \
+ ((ran) << 19) | \
+ ((bch) << 14) | \
+ ((short_mode) << 13) | \
+ (((page_size) & 0x7f) << 6) | \
+ ((pages) & 0x3f) \
+ )
+
+#define GENCMDDADDRL(adl, addr) ((adl) | ((addr) & 0xffff))
+#define GENCMDDADDRH(adh, addr) ((adh) | (((addr) >> 16) & 0xffff))
+#define GENCMDIADDRL(ail, addr) ((ail) | ((addr) & 0xffff))
+#define GENCMDIADDRH(aih, addr) ((aih) | (((addr) >> 16) & 0xffff))
+
+#define RB_STA(x) (1 << (26 + x))
+
+#define ECC_CHECK_RETURN_FF (-1)
+
+#define NAND_CE0 (0xe << 10)
+#define NAND_CE1 (0xd << 10)
+
+#define DMA_BUSY_TIMEOUT 0x100000
+
+#define MAX_CE_NUM 2
+#define RAN_ENABLE 1
+
+#define SD_EMMC_CLOCK 0x00
+#define CLK_ALWAYS_ON BIT(28)
+#define CLK_SELECT_NAND BIT(31)
+#define CLK_DIV_MASK GENMASK(5, 0)
+#define CLK_SRC_MASK GENMASK(7, 6)
+
+#define NFC_CLK_CYCLE 6
+
+/* nand flash controller delay 3 ns */
+#define NFC_DEFAULT_DELAY 3000
+
+#define MAX_ECC_INDEX 10
+
+#define MUX_CLK_NUM_PARENTS 2
+
+struct meson_nfc_info_format {
+ u16 info_bytes;
+ u8 zero_cnt; /* bit0~5 is valid */
+ struct ecc_sta {
+ u8 eccerr_cnt : 6;
+ u8 notused : 1;
+ u8 completed : 1;
+ } ecc;
+ u32 reserved;
+};
+
+#define PER_INFO_BYTE (sizeof(struct meson_nfc_info_format))
+
+struct meson_nfc_nand_chip {
+ struct list_head node;
+ struct nand_chip nand;
+ /*
+ * Then NAND controller support two oob modes:
+ * a) 2 user bytes with each ecc page;
+ * b) 16 user bytes with 1st ecc page and zero user byte
+ * with the other ecc pages.
+ * when using as mtd mode, the driver prefer to use 2 user bytes mode.
+ */
+ int user_mode;
+ int rand_mode; /* 0: disable scramble, 1: enable scramble */
+ int bch_mode;
+ int cs;
+
+ u8 *data_buf;
+ u8 *info_buf;
+};
+
+/*
+ * While booting from NAND, a page0 data is needed to tell ROM boot code
+ * to read SPL image, and the ROM boot code need to know which ecc mode
+ * is selected and whether scramble is enabled or not, and so on.
+ *
+ * So when updating SPL image, the driver need to store these informations
+ * into the page0, and SPL image will be loadded into next page - the page1.
+ */
+struct meson_nand_setup {
+ u32 d32;
+ u16 id;
+ u16 max;
+};
+
+struct meson_nand_page0 {
+ struct meson_nand_setup nand_setup;
+ unsigned char page_list[16];
+ unsigned short reserved[32];
+};
+
+struct meson_nand_ecc {
+ int bch;
+ int strength;
+ int parity;
+};
+
+struct meson_nfc_data {
+ struct meson_nand_ecc *ecc;
+ int ecc_num;
+ int bch_mode;
+ int short_bch;
+};
+
+struct meson_nfc_param {
+ int chip_select;
+ int rb_select;
+
+ int page_size;
+ int oob_size;
+ int ecc_size;
+ int ecc_bytes;
+
+ int rand_mode;
+ int oob_mode;
+ int bch_mode;
+ int ecc_step;
+
+ int ecc_max;
+};
+
+struct meson_nfc {
+ struct nand_hw_control controller;
+ struct clk *core_clk;
+ struct clk *device_clk;
+
+ struct device *dev;
+ void __iomem *reg_base;
+ struct regmap *reg_clk;
+
+ struct completion completion;
+ struct list_head chips;
+ struct meson_nfc_data *data;
+ struct meson_nfc_param param;
+ struct meson_nand_page0 *page0;
+
+ u8 *data_buf;
+ u8 *info_buf;
+};
+
+enum {
+ NFC_ECC_NONE = 0,
+ NFC_ECC_BCH8, /* bch8 with ecc page size of 512B */
+ NFC_ECC_BCH8_1K, /* bch8 with ecc page size of 1024B */
+ NFC_ECC_BCH24_1K,
+ NFC_ECC_BCH30_1K,
+ NFC_ECC_BCH40_1K,
+ NFC_ECC_BCH50_1K,
+ NFC_ECC_BCH60_1K,
+
+ /*
+ * Short mode is special only for page 0 when inplement booting
+ * from nand, which means a small size(384 bit / 8 = 48 Byte) of
+ * ecc page is used with a fixed ecc mode. rom code will use short mode
+ * to read page0 for getting nand parameters such as ecc, scramber, etc.
+ *
+ * Example, in GXL SoC, the first page adopt the short mode with
+ * 60bit ecc, while in AXG SoC, it adopt short mode with 8bit ecc.
+ */
+ NFC_ECC_BCH_SHORT,
+};
+
+enum {
+ NFC_USER2_OOB_BYTES = 2,
+ NFC_USER16_OOB_BYTES = 16,
+};
+
+#define MESON_ECC_DATA(b, s, p) \
+ { .bch = (b), .strength = (s), .parity = (p) }
+
+struct meson_nand_ecc meson_gxl_ecc[] = {
+ MESON_ECC_DATA(NFC_ECC_NONE, 0, 0),
+ MESON_ECC_DATA(NFC_ECC_BCH8, 8, 14),
+ MESON_ECC_DATA(NFC_ECC_BCH8_1K, 8, 14),
+ MESON_ECC_DATA(NFC_ECC_BCH24_1K, 24, 42),
+ MESON_ECC_DATA(NFC_ECC_BCH30_1K, 30, 54),
+ MESON_ECC_DATA(NFC_ECC_BCH40_1K, 40, 70),
+ MESON_ECC_DATA(NFC_ECC_BCH50_1K, 50, 88),
+ MESON_ECC_DATA(NFC_ECC_BCH60_1K, 60, 106),
+ MESON_ECC_DATA(NFC_ECC_BCH_SHORT, 0xff, 0xff),
+};
+
+struct meson_nand_ecc meson_axg_ecc[] = {
+ MESON_ECC_DATA(NFC_ECC_NONE, 0, 0),
+ MESON_ECC_DATA(NFC_ECC_BCH8, 8, 14),
+ MESON_ECC_DATA(NFC_ECC_BCH8_1K, 8, 14),
+ MESON_ECC_DATA(NFC_ECC_BCH_SHORT, 0xff, 0xff),
+};
+
+static inline struct meson_nfc_nand_chip *to_meson_nand(struct nand_chip *nand)
+{
+ return container_of(nand, struct meson_nfc_nand_chip, nand);
+}
+
+static int meson_nfc_page0_gen(struct meson_nfc *nfc)
+{
+ u32 cmd;
+
+ nfc->page0 = devm_kzalloc(nfc->dev,
+ sizeof(struct meson_nand_page0), GFP_KERNEL);
+ if(!nfc->page0)
+ return -ENOMEM;
+
+ cmd = CMDRWGEN(NFC_CMD_N2M, nfc->param.rand_mode,
+ nfc->param.bch_mode, 0,
+ nfc->param.ecc_size >> 3,
+ nfc->param.ecc_step);
+ cmd |= NFC_RB_USED | NFC_LARGE_PAGE | NFC_RW_OPS;
+ nfc->page0->nand_setup.d32 = cmd;
+
+ return 0;
+}
+
+static void meson_nfc_select_chip(struct mtd_info *mtd, int chip)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct meson_nfc_nand_chip *meson_chip = to_meson_nand(nand);
+ struct meson_nfc *nfc = nand_get_controller_data(nand);
+
+ if (chip != meson_chip->cs)
+ return;
+
+ nfc->param.chip_select = chip ? NAND_CE1 : NAND_CE0;
+ nfc->param.rb_select = chip ? NAND_CE1 : NAND_CE0;
+ nfc->param.oob_mode =
+ (meson_chip->user_mode == NFC_USER2_OOB_BYTES) ? 0 : 1;
+ nfc->param.rand_mode = meson_chip->rand_mode;
+ nfc->param.bch_mode = meson_chip->bch_mode;
+
+ nfc->param.ecc_step = mtd->writesize / nand->ecc.size;
+ nfc->param.ecc_size = nand->ecc.size;
+ nfc->param.ecc_bytes = nand->ecc.bytes;
+ nfc->param.page_size = mtd->writesize;
+ nfc->param.oob_size = mtd->oobsize;
+ nfc->param.ecc_max = nand->ecc.strength;
+
+ nfc->data_buf = meson_chip->data_buf;
+ nfc->info_buf = meson_chip->info_buf;
+}
+
+static inline void meson_nfc_cmd_idle(struct meson_nfc *nfc, u32 time)
+{
+ writel(nfc->param.chip_select | NFC_CMD_IDLE | (time & 0x3ff),
+ nfc->reg_base + NFC_REG_CMD);
+}
+
+static void meson_nfc_cmd_ctrl(struct mtd_info *mtd,
+ int cmd, unsigned int ctrl)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(mtd_to_nand(mtd));
+
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ cmd = nfc->param.chip_select | (cmd & 0xff);
+ cmd |= (ctrl & NAND_CLE) ? NFC_CMD_CLE : NFC_CMD_ALE;
+
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+}
+
+static inline void meson_nfc_cmd_seed(struct meson_nfc *nfc, u32 seed)
+{
+ writel(NFC_CMD_SEED | (0xc2 + (seed & 0x7fff)),
+ nfc->reg_base + NFC_REG_CMD);
+}
+
+static void meson_nfc_cmd_m2n(struct meson_nfc *nfc, int raw)
+{
+ u32 cmd, pagesize, pages, shortm = 0;
+ int bch = nfc->param.bch_mode;
+ int len = nfc->param.page_size;
+
+ pagesize = nfc->param.ecc_size;
+
+ if (unlikely(raw)) {
+ bch = NAND_ECC_NONE;
+ len = nfc->param.page_size + nfc->param.oob_size;
+ cmd = NFC_CMD_M2N |
+ (len & 0x3fff) | (nfc->param.rand_mode << 19);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ return;
+ }
+
+ if (unlikely(bch == NFC_ECC_BCH_SHORT)) {
+ bch = nfc->data->short_bch;
+ pagesize = 384 >> 3;
+ pages = len / nfc->param.ecc_size;
+ memcpy(nfc->data_buf,
+ nfc->page0, sizeof(struct meson_nand_page0));
+ shortm = 1;
+ } else
+ pages = len / nfc->param.ecc_size;
+
+ cmd = CMDRWGEN(NFC_CMD_M2N,
+ nfc->param.rand_mode, bch, shortm, pagesize, pages);
+
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+}
+
+static void meson_nfc_cmd_n2m(struct meson_nfc *nfc, int raw)
+{
+ u32 cmd, pagesize, pages, shortm = 0;
+ int bch = nfc->param.bch_mode;
+ int len = nfc->param.page_size;
+
+ pagesize = nfc->param.ecc_size;
+
+ if (unlikely(raw)) {
+ bch = NAND_ECC_NONE;
+ len = nfc->param.page_size + nfc->param.oob_size;
+ cmd = (len & 0x3fff) | (nfc->param.rand_mode << 19) |
+ NFC_CMD_N2M;
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ return;
+ }
+
+ if (unlikely(bch == NFC_ECC_BCH_SHORT)) {
+ bch = nfc->data->short_bch;
+ pagesize = 384 >> 3;
+ pages = len / nfc->param.ecc_size;
+ shortm = 1;
+ } else
+ pages = len / nfc->param.ecc_size;
+
+ cmd = CMDRWGEN(NFC_CMD_N2M,
+ nfc->param.rand_mode, bch, shortm, pagesize, pages);
+
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+}
+
+static int meson_nfc_wait_cmd_finish(struct meson_nfc *nfc,
+ unsigned int timeout_ms)
+{
+ u32 cmd_size = 0;
+ int ret;
+
+ /* wait cmd fifo is empty */
+ ret = readl_poll_timeout(nfc->reg_base + NFC_REG_CMD,
+ cmd_size,
+ !((cmd_size >> 22) & 0x1f),
+ 10, timeout_ms * 1000);
+ if (ret)
+ dev_err(nfc->dev, "wait for empty cmd FIFO time out\n");
+
+ return ret;
+}
+
+static int meson_nfc_wait_dma_finish(struct meson_nfc *nfc)
+{
+ meson_nfc_cmd_idle(nfc, 0);
+ meson_nfc_cmd_idle(nfc, 0);
+
+ return meson_nfc_wait_cmd_finish(nfc, DMA_BUSY_TIMEOUT);
+}
+
+static inline struct meson_nfc_info_format *nfc_info_ptr(struct meson_nfc *nfc,
+ int index)
+{
+ return (struct meson_nfc_info_format *) &nfc->info_buf[index * 8];
+}
+
+static u8 *meson_nfc_oob_ptr(struct meson_nfc *nfc, int i)
+{
+ int x, len;
+ int ecc_bytes = nfc->param.ecc_bytes, temp = nfc->param.ecc_size;
+
+ x = i ? 16 : 0;
+ len = (nfc->param.oob_mode) ? (temp * (i + 1) + ecc_bytes * i + x) :
+ (temp * (i + 1) + (ecc_bytes + 2) * i);
+
+ return nfc->data_buf + len;
+}
+
+static u8 *meson_nfc_data_ptr(struct meson_nfc *nfc, int i)
+{
+ int len, x;
+ int temp = nfc->param.ecc_size + nfc->param.ecc_bytes;
+
+ x = i ? 16 : 0;
+ len = nfc->param.oob_mode ? (temp * i + x) : (temp + 2) * i;
+
+ return nfc->data_buf + len;
+}
+
+static void meson_nfc_prase_data_oob(struct meson_nfc *nfc, u8 *buf, u8 *oob)
+{
+ int i, oob_len = 0;
+ u8 *dsrc, *osrc;
+
+ for (i = 0; i < nfc->param.ecc_step; i++) {
+ if (buf) {
+ dsrc = meson_nfc_data_ptr(nfc, i);
+ memcpy(buf, dsrc, nfc->param.ecc_size);
+ buf += nfc->param.ecc_size;
+ }
+
+ if (nfc->param.oob_mode)
+ oob_len = (i) ? nfc->param.ecc_bytes :
+ nfc->param.ecc_bytes + 16;
+ else
+ oob_len = nfc->param.ecc_bytes + 2;
+
+ osrc = meson_nfc_oob_ptr(nfc, i);
+ memcpy(oob, osrc, oob_len);
+ oob += oob_len;
+ }
+}
+
+static void meson_nfc_format_data_oob(struct meson_nfc *nfc,
+ const u8 *buf, u8 *oob)
+{
+ int i, oob_len = 0;
+ u8 *dsrc, *osrc;
+
+ for (i = 0; i < nfc->param.ecc_step; i++) {
+ if (buf) {
+ dsrc = meson_nfc_data_ptr(nfc, i);
+ memcpy(dsrc, buf, nfc->param.ecc_size);
+ buf += nfc->param.ecc_size;
+ }
+
+ if (nfc->param.oob_mode)
+ oob_len = i ? nfc->param.ecc_bytes :
+ nfc->param.ecc_bytes + 16;
+ else
+ oob_len = nfc->param.ecc_bytes + 2;
+
+ osrc = meson_nfc_oob_ptr(nfc, i);
+ memcpy(osrc, oob, oob_len);
+ oob += oob_len;
+ }
+}
+
+static int meson_nfc_queue_rb(struct meson_nfc *nfc)
+{
+ u32 cmd, cfg;
+ int ret = 0;
+
+ init_completion(&nfc->completion);
+
+ cfg = readl(nfc->reg_base + NFC_REG_CFG);
+ cfg |= (1 << 21);
+ writel(cfg, nfc->reg_base + NFC_REG_CFG);
+
+ meson_nfc_cmd_idle(nfc, NAND_TWB_TIME_CYCLE);
+ cmd = nfc->param.chip_select | NFC_CMD_CLE | (NAND_CMD_STATUS & 0xff);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ meson_nfc_cmd_idle(nfc, NAND_TWB_TIME_CYCLE);
+
+ cmd = NFC_CMD_RB | NFC_CMD_IO6 | (1 << 16) | (0x18 & 0x1f);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ meson_nfc_cmd_idle(nfc, 2);
+
+ ret = wait_for_completion_timeout(&nfc->completion,
+ msecs_to_jiffies(1000));
+ if (ret == 0) {
+ dev_err(nfc->dev, "wait nand irq timeout\n");
+ ret = -1;
+ }
+
+ return ret;
+}
+
+static void meson_nfc_set_user_byte(struct mtd_info *mtd,
+ struct nand_chip *chip, u8 *oob_buf)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ struct meson_nfc_info_format *info;
+ int i, count;
+
+ if (nfc->param.oob_mode) {
+ memcpy(nfc->info_buf, oob_buf, 16);
+ return;
+ }
+
+ for (i = 0, count = 0; i < chip->ecc.steps; i++, count += 2) {
+ info = nfc_info_ptr(nfc, i);
+ info->info_bytes =
+ oob_buf[count] | (oob_buf[count + 1] << 8);
+ }
+}
+
+static void meson_nfc_get_user_byte(struct mtd_info *mtd,
+ struct nand_chip *chip, u8 *oob_buf)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ struct meson_nfc_info_format *info;
+ int i, count;
+
+ if (nfc->param.oob_mode) {
+ memcpy(oob_buf, nfc->info_buf, 16);
+ return;
+ }
+
+ for (i = 0, count = 0; i < chip->ecc.steps; i++, count += 2) {
+ info = nfc_info_ptr(nfc, i);
+ oob_buf[count] = info->info_bytes & 0xff;
+ oob_buf[count + 1] = (info->info_bytes >> 8) & 0xff;
+ }
+}
+
+static int meson_nfc_ecc_correct(struct mtd_info *mtd,
+ struct nand_chip *chip)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ struct meson_nfc_info_format *info;
+ u32 bitflips = 0, i;
+ u8 zero_cnt;
+
+ for (i = 0; i < nfc->param.ecc_step; i++) {
+ info = nfc_info_ptr(nfc, i);
+ if (info->ecc.eccerr_cnt == 0x3f) {
+ zero_cnt = info->zero_cnt & 0x3f;
+ if (nfc->param.rand_mode
+ && (zero_cnt < nfc->param.ecc_max))
+ return ECC_CHECK_RETURN_FF;
+ mtd->ecc_stats.failed++;
+ continue;
+ }
+ mtd->ecc_stats.corrected += info->ecc.eccerr_cnt;
+ bitflips = max_t(u32, bitflips, info->ecc.eccerr_cnt);
+ }
+
+ return bitflips;
+}
+
+static inline u8 meson_nfc_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ u32 cmd;
+
+ cmd = nfc->param.chip_select | NFC_CMD_DRD | 0;
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+
+ meson_nfc_cmd_idle(nfc, 0);
+ meson_nfc_cmd_idle(nfc, 0);
+
+ meson_nfc_wait_cmd_finish(nfc, 1000);
+
+ return readb(nfc->reg_base + NFC_REG_BUF);
+}
+
+static void meson_nfc_read_buf(struct mtd_info *mtd, u8 *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ buf[i] = meson_nfc_read_byte(mtd);
+}
+
+static void meson_nfc_write_byte(struct mtd_info *mtd, u8 byte)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(mtd_to_nand(mtd));
+ u32 cmd;
+
+ meson_nfc_cmd_idle(nfc, NAND_TWB_TIME_CYCLE);
+
+ cmd = nfc->param.chip_select | NFC_CMD_DWR | (byte & 0xff);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+
+ meson_nfc_cmd_idle(nfc, NAND_TWB_TIME_CYCLE);
+ meson_nfc_cmd_idle(nfc, 0);
+
+ meson_nfc_wait_cmd_finish(nfc, 1000);
+}
+
+static void meson_nfc_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ meson_nfc_write_byte(mtd, buf[i]);
+}
+
+static int meson_nfc_write_page_sub(struct mtd_info *mtd,
+ struct nand_chip *chip, const u8 *buf, int page, int raw)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ dma_addr_t daddr, iaddr;
+ u32 cmd;
+ int ret;
+
+ nand_prog_page_begin_op(chip, page, 0, NULL, 0);
+
+ daddr = dma_map_single(nfc->dev, (void *)nfc->data_buf,
+ mtd->writesize + mtd->oobsize, DMA_TO_DEVICE);
+ ret = dma_mapping_error(nfc->dev, daddr);
+ if (ret) {
+ dev_err(nfc->dev, "dma mapping error\n");
+ return -EINVAL;
+ }
+
+ iaddr = dma_map_single(nfc->dev, (void *)nfc->info_buf,
+ nfc->param.ecc_step * PER_INFO_BYTE, DMA_TO_DEVICE);
+ ret = dma_mapping_error(nfc->dev, iaddr);
+ if (ret) {
+ dev_err(nfc->dev, "dma mapping error\n");
+ return -EINVAL;
+ }
+
+ cmd = GENCMDDADDRL(NFC_CMD_ADL, daddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ cmd = GENCMDDADDRH(NFC_CMD_ADH, daddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+
+ cmd = GENCMDIADDRL(NFC_CMD_AIL, iaddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ cmd = GENCMDIADDRH(NFC_CMD_AIH, iaddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+
+ meson_nfc_cmd_seed(nfc, page);
+
+ meson_nfc_cmd_m2n(nfc, raw);
+
+ ret = meson_nfc_wait_dma_finish(nfc);
+
+ dma_unmap_single(nfc->dev, daddr,
+ mtd->writesize + mtd->oobsize, DMA_TO_DEVICE);
+ dma_unmap_single(nfc->dev, iaddr,
+ nfc->param.ecc_step * PER_INFO_BYTE, DMA_TO_DEVICE);
+
+ return nand_prog_page_end_op(chip);
+}
+
+static int meson_nfc_write_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, const u8 *buf, int oob_required, int page)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ u8 *oob_buf = chip->oob_poi;
+
+ meson_nfc_format_data_oob(nfc, buf, oob_buf);
+
+ return meson_nfc_write_page_sub(mtd, chip, nfc->data_buf, page, 1);
+}
+
+static int meson_nfc_write_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, const u8 *buf,
+ int oob_required, int page)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ u8 *oob_buf = chip->oob_poi;
+
+ memcpy(nfc->data_buf, buf, mtd->writesize);
+ meson_nfc_set_user_byte(mtd, chip, oob_buf);
+
+ return meson_nfc_write_page_sub(mtd, chip, nfc->data_buf, page, 0);
+}
+
+static void meson_nfc_check_ecc_pages_valid(struct meson_nfc *nfc, int raw)
+{
+ struct meson_nfc_info_format *info;
+ int neccpages, i;
+
+ neccpages = raw ? 1 : nfc->param.ecc_step;
+
+ for (i = 0; i < neccpages; i++) {
+ info = nfc_info_ptr(nfc, neccpages - 1);
+ if (info->ecc.completed == 0)
+ dev_err(nfc->dev, "seems eccpage is invalid\n");
+ }
+}
+
+static int meson_nfc_read_page_sub(struct mtd_info *mtd,
+ struct nand_chip *chip, const u8 *buf, int page, int raw)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ dma_addr_t daddr, iaddr;
+ u32 cmd;
+ int ret;
+
+ nand_read_page_op(chip, page, 0, NULL, 0);
+
+ daddr = dma_map_single(nfc->dev, nfc->data_buf,
+ mtd->writesize + mtd->oobsize, DMA_FROM_DEVICE);
+ ret = dma_mapping_error(nfc->dev, daddr);
+ if (ret) {
+ dev_err(nfc->dev, "dma mapping error\n");
+ return -EINVAL;
+ }
+
+ iaddr = dma_map_single(nfc->dev, nfc->info_buf,
+ nfc->param.ecc_step * PER_INFO_BYTE, DMA_FROM_DEVICE);
+ ret = dma_mapping_error(nfc->dev, iaddr);
+ if (ret) {
+ dev_err(nfc->dev, "dma mapping error\n");
+ return -EINVAL;
+ }
+
+ cmd = GENCMDDADDRL(NFC_CMD_ADL, daddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ cmd = GENCMDDADDRH(NFC_CMD_ADH, daddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+
+ cmd = GENCMDIADDRL(NFC_CMD_AIL, iaddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+ cmd = GENCMDIADDRH(NFC_CMD_AIH, iaddr);
+ writel(cmd, nfc->reg_base + NFC_REG_CMD);
+
+ meson_nfc_cmd_seed(nfc, page);
+
+ meson_nfc_cmd_n2m(nfc, raw);
+
+ ret = meson_nfc_wait_dma_finish(nfc);
+
+ meson_nfc_queue_rb(nfc);
+
+ meson_nfc_check_ecc_pages_valid(nfc, raw);
+
+ dma_unmap_single(nfc->dev, daddr,
+ mtd->writesize + mtd->oobsize, DMA_FROM_DEVICE);
+ dma_unmap_single(nfc->dev, iaddr,
+ nfc->param.ecc_step * PER_INFO_BYTE, DMA_FROM_DEVICE);
+
+ return ret;
+}
+
+static int meson_nfc_read_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, u8 *buf, int oob_required, int page)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ u8 *oob_buf = chip->oob_poi;
+ int ret;
+
+ ret = meson_nfc_read_page_sub(mtd, chip, nfc->data_buf, page, 1);
+ if (ret)
+ return ret;
+
+ meson_nfc_prase_data_oob(nfc, buf, oob_buf);
+
+ return 0;
+}
+
+static int meson_nfc_read_page_hwecc(struct mtd_info *mtd,
+ struct nand_chip *chip, u8 *buf, int oob_required, int page)
+{
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ u8 *oob_buf = chip->oob_poi;
+ int ret;
+
+ ret = meson_nfc_read_page_sub(mtd, chip, nfc->data_buf, page, 0);
+ if (ret)
+ return ret;
+
+ meson_nfc_get_user_byte(mtd, chip, oob_buf);
+
+ ret = meson_nfc_ecc_correct(mtd, chip);
+ if (ret == ECC_CHECK_RETURN_FF) {
+ if (buf)
+ memset(buf, 0xff, mtd->writesize);
+
+ memset(oob_buf, 0xff, mtd->oobsize);
+ return 0;
+ }
+ if (buf && (buf != nfc->data_buf))
+ memcpy(buf, nfc->data_buf, mtd->writesize);
+
+ return ret;
+}
+
+static int meson_nfc_read_oob_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, int page)
+{
+ return meson_nfc_read_page_raw(mtd, chip, NULL, 1, page);
+}
+
+static int meson_nfc_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ return meson_nfc_read_page_hwecc(mtd, chip, NULL, 1, page);
+}
+
+static int meson_ooblayout_ecc(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+ int free_oob;
+
+ if (section > chip->ecc.steps)
+ return -ERANGE;
+
+ free_oob = nfc->param.oob_mode ? 16 : (chip->ecc.steps * 2);
+ oobregion->offset = section * chip->ecc.bytes + free_oob;
+ oobregion->length = chip->ecc.bytes;
+
+ return 0;
+}
+
+static int meson_ooblayout_free(struct mtd_info *mtd, int section,
+ struct mtd_oob_region *oobregion)
+{
+ struct nand_chip *chip = mtd_to_nand(mtd);
+ struct meson_nfc *nfc = nand_get_controller_data(chip);
+
+ if (section > chip->ecc.steps)
+ return -ERANGE;
+
+ oobregion->offset = 0;
+ oobregion->length = nfc->param.oob_mode ? 16 : (chip->ecc.steps * 2);
+
+ return 0;
+}
+
+static const struct mtd_ooblayout_ops meson_ooblayout_ops = {
+ .ecc = meson_ooblayout_ecc,
+ .free = meson_ooblayout_free,
+};
+
+static int meson_nfc_ecc_init(struct device *dev, struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct meson_nfc_nand_chip *meson_chip = to_meson_nand(nand);
+ struct meson_nfc *nfc = nand_get_controller_data(nand);
+ struct meson_nand_ecc *meson_ecc = nfc->data->ecc;
+ int num = nfc->data->ecc_num;
+ int nsectors, i, bytes;
+
+ /* support only ecc hw mode */
+ if (nand->ecc.mode != NAND_ECC_HW) {
+ dev_err(dev, "ecc.mode not supported\n");
+ return -EINVAL;
+ }
+
+ if (!nand->ecc.size || !nand->ecc.strength) {
+ /* use datasheet requirements */
+ nand->ecc.strength = nand->ecc_strength_ds;
+ nand->ecc.size = nand->ecc_step_ds;
+ }
+
+ if (nand->ecc.options & NAND_ECC_MAXIMIZE) {
+ nand->ecc.size = 1024;
+ nsectors = mtd->writesize / nand->ecc.size;
+
+ /* Reserve 2 bytes for each ecc page */
+ if (meson_chip->user_mode == NFC_USER2_OOB_BYTES)
+ bytes = mtd->oobsize - 2 * nsectors;
+ else
+ bytes = mtd->oobsize - 16;
+
+ bytes /= nsectors;
+
+ /* and bytes has to be even. */
+ if (bytes % 2)
+ bytes--;
+
+ nand->ecc.strength = bytes * 8 / fls(8 * nand->ecc.size);
+ } else {
+ if (nand->ecc.strength > meson_ecc[num - 1].strength) {
+ dev_err(dev, "not support ecc strength\n");
+ return -EINVAL;
+ }
+ }
+
+ for (i = 0; i < num; i++) {
+ if ((meson_ecc[i].strength == 0xff)
+ || (nand->ecc.strength < meson_ecc[i].strength))
+ break;
+ }
+
+ if (!i) {
+ nand->ecc.strength = 0;
+ } else {
+ nand->ecc.strength = meson_ecc[i - 1].strength;
+ nand->ecc.bytes = meson_ecc[i - 1].parity;
+ }
+
+ meson_chip->bch_mode = meson_ecc[i - 1].bch;
+
+ if (nand->ecc.size != 512 && nand->ecc.size != 1024)
+ return -EINVAL;
+
+ nsectors = mtd->writesize / nand->ecc.size;
+ bytes =(meson_chip->user_mode == NFC_USER2_OOB_BYTES) ? nsectors * 2 : 16;
+ if (mtd->oobsize < (nand->ecc.bytes * nsectors + bytes))
+ return -EINVAL;
+
+ return 0;
+}
+
+static const char * sd_emmc_ext_clk0_parent_names[MUX_CLK_NUM_PARENTS];
+
+static struct clk_regmap sd_emmc_c_ext_clk0_sel = {
+ .data = &(struct clk_regmap_mux_data){
+ .offset = SD_EMMC_CLOCK,
+ .mask = 0x3,
+ .shift = 6,
+ },
+ .hw.init = &(struct clk_init_data) {
+ .name = "sd_emmc_c_nand_clk_mux",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = sd_emmc_ext_clk0_parent_names,
+ .num_parents = ARRAY_SIZE(sd_emmc_ext_clk0_parent_names),
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap sd_emmc_c_ext_clk0_div = {
+ .data = &(struct clk_regmap_div_data){
+ .offset = SD_EMMC_CLOCK,
+ .shift = 0,
+ .width = 6,
+ .flags = CLK_DIVIDER_ROUND_CLOSEST | CLK_DIVIDER_ONE_BASED,
+ },
+ .hw.init = &(struct clk_init_data) {
+ .name = "sd_emmc_c_nand_clk_div",
+ .ops = &clk_regmap_divider_ops,
+ .parent_names = (const char *[]){ "sd_emmc_c_nand_clk_mux" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static int meson_nfc_clk_init(struct meson_nfc *nfc)
+{
+ struct clk_regmap *mux = &sd_emmc_c_ext_clk0_sel;
+ struct clk_regmap *div = &sd_emmc_c_ext_clk0_div;
+ struct clk *clk;
+ int i, ret;
+
+ /* request core clock */
+ nfc->core_clk = devm_clk_get(nfc->dev, "core");
+ if (IS_ERR(nfc->core_clk)) {
+ dev_err(nfc->dev, "failed to get core clk\n");
+ return PTR_ERR(nfc->core_clk);
+ }
+
+ /* init SD_EMMC_CLOCK to sane defaults w/min clock rate */
+ regmap_update_bits(nfc->reg_clk, 0,
+ CLK_SELECT_NAND | CLK_ALWAYS_ON | CLK_DIV_MASK,
+ CLK_SELECT_NAND | CLK_ALWAYS_ON | CLK_DIV_MASK);
+
+ /* get the mux parents */
+ for (i = 0; i < MUX_CLK_NUM_PARENTS; i++) {
+ char name[16];
+
+ snprintf(name, sizeof(name), "clkin%d", i);
+ clk = devm_clk_get(nfc->dev, name);
+ if (IS_ERR(clk)) {
+ if (clk != ERR_PTR(-EPROBE_DEFER))
+ dev_err(nfc->dev, "Missing clock %s\n", name);
+ return PTR_ERR(clk);
+ }
+
+ sd_emmc_ext_clk0_parent_names[i] = __clk_get_name(clk);
+ }
+
+ mux->map = nfc->reg_clk;
+ clk = devm_clk_register(nfc->dev, &mux->hw);
+ if (WARN_ON(IS_ERR(clk)))
+ return PTR_ERR(clk);
+
+ div->map = nfc->reg_clk;
+ nfc->device_clk = devm_clk_register(nfc->dev, &div->hw);
+ if (WARN_ON(IS_ERR(nfc->device_clk)))
+ return PTR_ERR(nfc->device_clk);
+
+ ret = clk_prepare_enable(nfc->core_clk);
+ if (ret) {
+ dev_err(nfc->dev, "failed to enable core clk\n");
+ return ret;
+ }
+
+ ret = clk_prepare_enable(nfc->device_clk);
+ if (ret) {
+ dev_err(nfc->dev, "failed to enable device clk\n");
+ clk_disable_unprepare(nfc->core_clk);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void meson_nfc_disable_clk(struct meson_nfc *nfc)
+{
+ clk_disable_unprepare(nfc->device_clk);
+ clk_disable_unprepare(nfc->core_clk);
+}
+
+static int meson_nfc_buffer_init(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct meson_nfc_nand_chip *meson_chip = to_meson_nand(nand);
+ struct meson_nfc *nfc = nand_get_controller_data(nand);
+ struct device *dev = nfc->dev;
+ int info_bytes, page_bytes;
+ int nsectors;
+
+ nsectors = mtd->writesize / nand->ecc.size;
+ info_bytes = nsectors * PER_INFO_BYTE;
+ page_bytes = mtd->writesize + mtd->oobsize;
+
+ if ((meson_chip->data_buf) && (meson_chip->info_buf))
+ return 0;
+
+ meson_chip->data_buf = devm_kzalloc(dev, page_bytes, GFP_KERNEL);
+ if (!meson_chip->data_buf)
+ return -ENOMEM;
+
+ meson_chip->info_buf = devm_kzalloc(dev, info_bytes, GFP_KERNEL);
+ if (!meson_chip->info_buf)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int meson_nfc_calc_set_timing(struct meson_nfc *nfc,
+ int rc_min, int rea_max, int rhoh_min)
+{
+ int div, bt_min, bt_max, bus_timing;
+ int ret;
+
+ div = DIV_ROUND_UP((rc_min / 1000), NFC_CLK_CYCLE);
+ ret = clk_set_rate(nfc->device_clk, 1000000000 / div);
+ if (ret) {
+ dev_err(nfc->dev, "failed to set nand clock rate\n");
+ return ret;
+ }
+
+ bt_min = (rea_max + NFC_DEFAULT_DELAY) / div;
+ bt_max = (NFC_DEFAULT_DELAY + rhoh_min + rc_min / 2) / div;
+
+ bt_min = DIV_ROUND_UP(bt_min, 1000);
+ bt_max = DIV_ROUND_UP(bt_max, 1000);
+
+ if (bt_max < bt_min)
+ return -EINVAL;
+
+ bus_timing = (bt_min + bt_max) / 2 + 1;
+
+ writel((1 << 21), nfc->reg_base + NFC_REG_CFG);
+ writel((NFC_CLK_CYCLE - 1) | (bus_timing << 5),
+ nfc->reg_base + NFC_REG_CFG);
+
+ writel((1 << 31), nfc->reg_base + NFC_REG_CMD);
+
+ return 0;
+}
+
+static int meson_nfc_setup_data_interface(struct mtd_info *mtd, int csline,
+ const struct nand_data_interface *conf)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct meson_nfc *nfc = nand_get_controller_data(nand);
+ const struct nand_sdr_timings *timings;
+
+ timings = nand_get_sdr_timings(conf);
+ if (IS_ERR(timings))
+ return -ENOTSUPP;
+
+ if (csline == NAND_DATA_IFACE_CHECK_ONLY)
+ return 0;
+
+ meson_nfc_calc_set_timing(nfc, timings->tRC_min,
+ timings->tREA_max, timings->tRHOH_min);
+
+ return 0;
+}
+
+static int meson_nfc_get_nand_chip_dts(struct meson_nfc *nfc,
+ struct meson_nfc_nand_chip *chip, struct device_node *np)
+{
+ struct device *dev = nfc->dev;
+
+ if (of_property_read_u32(np, "reg", &chip->cs)) {
+ dev_err(dev, "can not get ce number\n");
+ return -EINVAL;
+ }
+
+ if (chip->cs > MAX_CE_NUM) {
+ dev_err(dev, "ce number is beyond\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(np, "meson-nand-user-mode", &chip->user_mode)) {
+ dev_err(dev, "can not get user oob mode\n");
+ return -EINVAL;
+ }
+
+ if ((chip->user_mode != NFC_USER2_OOB_BYTES)
+ || (chip->user_mode != NFC_USER16_OOB_BYTES))
+ chip->user_mode = NFC_USER2_OOB_BYTES;
+
+ if (of_property_read_u32(np, "meson-nand-ran-mode", &chip->rand_mode)) {
+ dev_err(dev, "can not get scramble mode\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int meson_nfc_nand_chip_init(struct device *dev, struct meson_nfc *nfc,
+ struct device_node *np)
+{
+ struct meson_nfc_nand_chip *chip;
+ struct nand_chip *nand;
+ struct mtd_info *mtd;
+ int ret;
+
+ chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ ret = meson_nfc_get_nand_chip_dts(nfc, chip, np);
+ if (ret)
+ return ret;
+
+ nand = &chip->nand;
+ nand_set_flash_node(nand, np);
+ nand_set_controller_data(nand, nfc);
+
+ nand->options |= NAND_USE_BOUNCE_BUFFER;
+ nand->select_chip = meson_nfc_select_chip;
+ nand->write_byte = meson_nfc_write_byte;
+ nand->write_buf = meson_nfc_write_buf;
+ nand->read_byte = meson_nfc_read_byte;
+ nand->read_buf = meson_nfc_read_buf;
+ nand->cmd_ctrl = meson_nfc_cmd_ctrl;
+ nand->setup_data_interface = meson_nfc_setup_data_interface;
+
+ nand->chip_delay = 200;
+ nand->ecc.mode = NAND_ECC_HW;
+
+ nand->ecc.write_page_raw = meson_nfc_write_page_raw;
+ nand->ecc.write_page = meson_nfc_write_page_hwecc;
+ nand->ecc.write_oob_raw = nand_write_oob_std;
+ nand->ecc.write_oob = nand_write_oob_std;
+
+ nand->ecc.read_page_raw = meson_nfc_read_page_raw;
+ nand->ecc.read_page = meson_nfc_read_page_hwecc;
+ nand->ecc.read_oob_raw = meson_nfc_read_oob_raw;
+ nand->ecc.read_oob = meson_nfc_read_oob;
+
+ mtd = nand_to_mtd(nand);
+ mtd->owner = THIS_MODULE;
+ mtd->dev.parent = dev;
+ mtd->name = devm_kasprintf(nfc->dev, GFP_KERNEL,
+ "%s:nand", dev_name(dev));
+ if (!mtd->name) {
+ dev_err(nfc->dev, "Failed to allocate mtd->name\n");
+ return -ENOMEM;
+ }
+
+ mtd_set_ooblayout(mtd, &meson_ooblayout_ops);
+
+ ret = nand_scan_ident(mtd, 1, NULL);
+ if (ret) {
+ dev_err(dev, "failed to can ident\n");
+ return -ENODEV;
+ }
+
+ /* store bbt magic in page, cause OOB is not protected */
+ if (nand->bbt_options & NAND_BBT_USE_FLASH)
+ nand->bbt_options |= NAND_BBT_NO_OOB;
+
+ nand->options |= NAND_NO_SUBPAGE_WRITE;
+
+ ret = meson_nfc_ecc_init(dev, mtd);
+ if (ret) {
+ dev_err(dev, "failed to ecc init\n");
+ return -EINVAL;
+ }
+
+ if (nand->options & NAND_BUSWIDTH_16) {
+ dev_err(dev, "16bits buswidth not supported");
+ return -EINVAL;
+ }
+
+ ret = meson_nfc_buffer_init(mtd);
+ if (ret)
+ return -ENOMEM;
+
+ ret = nand_scan_tail(mtd);
+ if (ret)
+ return -ENODEV;
+
+ ret = mtd_device_register(mtd, NULL, 0);
+ if (ret) {
+ dev_err(dev, "failed to register mtd device: %d\n", ret);
+ nand_release(mtd);
+ return ret;
+ }
+
+ list_add_tail(&chip->node, &nfc->chips);
+
+ return 0;
+}
+
+static int meson_nfc_nand_chips_init(struct device *dev, struct meson_nfc *nfc)
+{
+ struct device_node *np = dev->of_node;
+ struct device_node *nand_np;
+ int ret;
+
+ for_each_child_of_node(np, nand_np) {
+ ret = meson_nfc_nand_chip_init(dev, nfc, nand_np);
+ if (ret) {
+ of_node_put(nand_np);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static irqreturn_t meson_nfc_irq(int irq, void *id)
+{
+ struct meson_nfc *nfc = id;
+ u32 cfg;
+
+ cfg = readl(nfc->reg_base + NFC_REG_CFG);
+ cfg |= (1 << 21);
+ writel(cfg, nfc->reg_base + NFC_REG_CFG);
+
+ complete(&nfc->completion);
+ return IRQ_HANDLED;
+}
+
+static const struct meson_nfc_data meson_gxl_data = {
+ .short_bch = NFC_ECC_BCH60_1K,
+ .ecc = meson_gxl_ecc,
+ .ecc_num = ARRAY_SIZE(meson_gxl_ecc),
+};
+
+static const struct meson_nfc_data meson_axg_data = {
+ .short_bch = NFC_ECC_BCH8_1K,
+ .ecc = meson_axg_ecc,
+ .ecc_num = ARRAY_SIZE(meson_axg_ecc),
+};
+
+static const struct of_device_id meson_nfc_id_table[] = {
+ {
+ .compatible = "amlogic,meson-gxl-nfc",
+ .data = &meson_gxl_data,
+ }, {
+ .compatible = "amlogic,meson-axg-nfc",
+ .data = &meson_axg_data,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, meson_nfc_id_table);
+
+static int meson_nfc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct meson_nfc *nfc;
+ struct resource *res;
+ const struct of_device_id *of_nfc_id;
+ int ret, irq;
+
+ nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL);
+ if (!nfc)
+ return -ENOMEM;
+
+ of_nfc_id = of_match_device(meson_nfc_id_table, &pdev->dev);
+ if (!of_nfc_id)
+ return -ENODEV;
+
+ nfc->data = (struct meson_nfc_data *)of_nfc_id->data;
+
+ spin_lock_init(&nfc->controller.lock);
+ init_waitqueue_head(&nfc->controller.wq);
+ INIT_LIST_HEAD(&nfc->chips);
+
+ nfc->dev = dev;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "Failed to nfc reg resource\n");
+ return -EINVAL;
+ }
+
+ nfc->reg_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(nfc->reg_base)) {
+ dev_err(dev, "Failed to lookup nfi reg base\n");
+ return PTR_ERR(nfc->reg_base);
+ }
+
+ nfc->reg_clk = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "amlogic,mmc-syscon");
+ if (IS_ERR(nfc->reg_clk)) {
+ dev_err(dev, "Failed to lookup clock base\n");
+ return PTR_ERR(nfc->reg_clk);
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "no nfi irq resource\n");
+ return -EINVAL;
+ }
+
+ ret = meson_nfc_clk_init(nfc);
+ if (ret) {
+ dev_err(dev, "failed to initialize nand clk\n");
+ goto err_clk;
+ }
+
+ ret = devm_request_irq(dev, irq, meson_nfc_irq, 0, dev_name(dev), nfc);
+ if (ret) {
+ dev_err(dev, "failed to request nfi irq\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+
+ ret = dma_set_mask(dev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(dev, "failed to set dma mask\n");
+ goto err_clk;
+ }
+
+ platform_set_drvdata(pdev, nfc);
+
+ ret = meson_nfc_nand_chips_init(dev, nfc);
+ if (ret) {
+ dev_err(dev, "failed to init nand chips\n");
+ goto err_clk;
+ }
+
+ meson_nfc_page0_gen(nfc);
+ return 0;
+
+err_clk:
+ clk_disable_unprepare(nfc->device_clk);
+ clk_disable_unprepare(nfc->core_clk);
+
+ return ret;
+}
+
+static int meson_nfc_remove(struct platform_device *pdev)
+{
+ struct meson_nfc *nfc = platform_get_drvdata(pdev);
+ struct meson_nfc_nand_chip *chip;
+
+ while (!list_empty(&nfc->chips)) {
+ chip = list_first_entry(&nfc->chips, struct meson_nfc_nand_chip,
+ node);
+ nand_release(nand_to_mtd(&chip->nand));
+ list_del(&chip->node);
+ }
+
+ meson_nfc_disable_clk(nfc);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver meson_nfc_driver = {
+ .probe = meson_nfc_probe,
+ .remove = meson_nfc_remove,
+ .driver = {
+ .name = "meson_nand",
+ .of_match_table = meson_nfc_id_table,
+ },
+};
+
+module_platform_driver(meson_nfc_driver);
+
+MODULE_LICENSE("Dual MIT/GPL");
+MODULE_AUTHOR("Liang Yang <liang.yang@amlogic.com>");
+MODULE_DESCRIPTION("Amlogic's Meson NAND Flash Controller driver");
--
2.17.1
\
 
 \ /
  Last update: 2018-06-13 10:17    [W:0.068 / U:12.548 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site