--- /dev/null
+/*
+ * Copyright (C) 2013 Boris BREZILLON <b.brezillon.dev@gmail.com>
+ * Copyright (C) 2015 Roy Spliet <r.spliet@ultimaker.com>
+ *
+ * Derived from:
+ * https://github.com/yuq/sunxi-nfc-mtd
+ * Copyright (C) 2013 Qiang Yu <yuq825@gmail.com>
+ *
+ * https://github.com/hno/Allwinner-Info
+ * Copyright (C) 2013 Henrik Nordström <Henrik Nordström>
+ *
+ * Copyright (C) 2013 Dmitriy B. <rzk333@gmail.com>
+ * Copyright (C) 2013 Sergey Lapin <slapin@ossfans.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <memalign.h>
+#include <nand.h>
+
+#include <linux/kernel.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/io.h>
+
+#include <asm/gpio.h>
+#include <asm/arch/clock.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define NFC_REG_CTL 0x0000
+#define NFC_REG_ST 0x0004
+#define NFC_REG_INT 0x0008
+#define NFC_REG_TIMING_CTL 0x000C
+#define NFC_REG_TIMING_CFG 0x0010
+#define NFC_REG_ADDR_LOW 0x0014
+#define NFC_REG_ADDR_HIGH 0x0018
+#define NFC_REG_SECTOR_NUM 0x001C
+#define NFC_REG_CNT 0x0020
+#define NFC_REG_CMD 0x0024
+#define NFC_REG_RCMD_SET 0x0028
+#define NFC_REG_WCMD_SET 0x002C
+#define NFC_REG_IO_DATA 0x0030
+#define NFC_REG_ECC_CTL 0x0034
+#define NFC_REG_ECC_ST 0x0038
+#define NFC_REG_DEBUG 0x003C
+#define NFC_REG_ECC_ERR_CNT(x) ((0x0040 + (x)) & ~0x3)
+#define NFC_REG_USER_DATA(x) (0x0050 + ((x) * 4))
+#define NFC_REG_SPARE_AREA 0x00A0
+#define NFC_REG_PAT_ID 0x00A4
+#define NFC_RAM0_BASE 0x0400
+#define NFC_RAM1_BASE 0x0800
+
+/* define bit use in NFC_CTL */
+#define NFC_EN BIT(0)
+#define NFC_RESET BIT(1)
+#define NFC_BUS_WIDTH_MSK BIT(2)
+#define NFC_BUS_WIDTH_8 (0 << 2)
+#define NFC_BUS_WIDTH_16 (1 << 2)
+#define NFC_RB_SEL_MSK BIT(3)
+#define NFC_RB_SEL(x) ((x) << 3)
+#define NFC_CE_SEL_MSK (0x7 << 24)
+#define NFC_CE_SEL(x) ((x) << 24)
+#define NFC_CE_CTL BIT(6)
+#define NFC_PAGE_SHIFT_MSK (0xf << 8)
+#define NFC_PAGE_SHIFT(x) (((x) < 10 ? 0 : (x) - 10) << 8)
+#define NFC_SAM BIT(12)
+#define NFC_RAM_METHOD BIT(14)
+#define NFC_DEBUG_CTL BIT(31)
+
+/* define bit use in NFC_ST */
+#define NFC_RB_B2R BIT(0)
+#define NFC_CMD_INT_FLAG BIT(1)
+#define NFC_DMA_INT_FLAG BIT(2)
+#define NFC_CMD_FIFO_STATUS BIT(3)
+#define NFC_STA BIT(4)
+#define NFC_NATCH_INT_FLAG BIT(5)
+#define NFC_RB_STATE(x) BIT(x + 8)
+
+/* define bit use in NFC_INT */
+#define NFC_B2R_INT_ENABLE BIT(0)
+#define NFC_CMD_INT_ENABLE BIT(1)
+#define NFC_DMA_INT_ENABLE BIT(2)
+#define NFC_INT_MASK (NFC_B2R_INT_ENABLE | \
+ NFC_CMD_INT_ENABLE | \
+ NFC_DMA_INT_ENABLE)
+
+/* define bit use in NFC_TIMING_CTL */
+#define NFC_TIMING_CTL_EDO BIT(8)
+
+/* define NFC_TIMING_CFG register layout */
+#define NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD) \
+ (((tWB) & 0x3) | (((tADL) & 0x3) << 2) | \
+ (((tWHR) & 0x3) << 4) | (((tRHW) & 0x3) << 6) | \
+ (((tCAD) & 0x7) << 8))
+
+/* define bit use in NFC_CMD */
+#define NFC_CMD_LOW_BYTE_MSK 0xff
+#define NFC_CMD_HIGH_BYTE_MSK (0xff << 8)
+#define NFC_CMD(x) (x)
+#define NFC_ADR_NUM_MSK (0x7 << 16)
+#define NFC_ADR_NUM(x) (((x) - 1) << 16)
+#define NFC_SEND_ADR BIT(19)
+#define NFC_ACCESS_DIR BIT(20)
+#define NFC_DATA_TRANS BIT(21)
+#define NFC_SEND_CMD1 BIT(22)
+#define NFC_WAIT_FLAG BIT(23)
+#define NFC_SEND_CMD2 BIT(24)
+#define NFC_SEQ BIT(25)
+#define NFC_DATA_SWAP_METHOD BIT(26)
+#define NFC_ROW_AUTO_INC BIT(27)
+#define NFC_SEND_CMD3 BIT(28)
+#define NFC_SEND_CMD4 BIT(29)
+#define NFC_CMD_TYPE_MSK (0x3 << 30)
+#define NFC_NORMAL_OP (0 << 30)
+#define NFC_ECC_OP (1 << 30)
+#define NFC_PAGE_OP (2 << 30)
+
+/* define bit use in NFC_RCMD_SET */
+#define NFC_READ_CMD_MSK 0xff
+#define NFC_RND_READ_CMD0_MSK (0xff << 8)
+#define NFC_RND_READ_CMD1_MSK (0xff << 16)
+
+/* define bit use in NFC_WCMD_SET */
+#define NFC_PROGRAM_CMD_MSK 0xff
+#define NFC_RND_WRITE_CMD_MSK (0xff << 8)
+#define NFC_READ_CMD0_MSK (0xff << 16)
+#define NFC_READ_CMD1_MSK (0xff << 24)
+
+/* define bit use in NFC_ECC_CTL */
+#define NFC_ECC_EN BIT(0)
+#define NFC_ECC_PIPELINE BIT(3)
+#define NFC_ECC_EXCEPTION BIT(4)
+#define NFC_ECC_BLOCK_SIZE_MSK BIT(5)
+#define NFC_ECC_BLOCK_512 (1 << 5)
+#define NFC_RANDOM_EN BIT(9)
+#define NFC_RANDOM_DIRECTION BIT(10)
+#define NFC_ECC_MODE_MSK (0xf << 12)
+#define NFC_ECC_MODE(x) ((x) << 12)
+#define NFC_RANDOM_SEED_MSK (0x7fff << 16)
+#define NFC_RANDOM_SEED(x) ((x) << 16)
+
+/* define bit use in NFC_ECC_ST */
+#define NFC_ECC_ERR(x) BIT(x)
+#define NFC_ECC_PAT_FOUND(x) BIT(x + 16)
+#define NFC_ECC_ERR_CNT(b, x) (((x) >> ((b) * 8)) & 0xff)
+
+#define NFC_DEFAULT_TIMEOUT_MS 1000
+
+#define NFC_SRAM_SIZE 1024
+
+#define NFC_MAX_CS 7
+
+/*
+ * Ready/Busy detection type: describes the Ready/Busy detection modes
+ *
+ * @RB_NONE: no external detection available, rely on STATUS command
+ * and software timeouts
+ * @RB_NATIVE: use sunxi NAND controller Ready/Busy support. The Ready/Busy
+ * pin of the NAND flash chip must be connected to one of the
+ * native NAND R/B pins (those which can be muxed to the NAND
+ * Controller)
+ * @RB_GPIO: use a simple GPIO to handle Ready/Busy status. The Ready/Busy
+ * pin of the NAND flash chip must be connected to a GPIO capable
+ * pin.
+ */
+enum sunxi_nand_rb_type {
+ RB_NONE,
+ RB_NATIVE,
+ RB_GPIO,
+};
+
+/*
+ * Ready/Busy structure: stores information related to Ready/Busy detection
+ *
+ * @type: the Ready/Busy detection mode
+ * @info: information related to the R/B detection mode. Either a gpio
+ * id or a native R/B id (those supported by the NAND controller).
+ */
+struct sunxi_nand_rb {
+ enum sunxi_nand_rb_type type;
+ union {
+ struct gpio_desc gpio;
+ int nativeid;
+ } info;
+};
+
+/*
+ * Chip Select structure: stores information related to NAND Chip Select
+ *
+ * @cs: the NAND CS id used to communicate with a NAND Chip
+ * @rb: the Ready/Busy description
+ */
+struct sunxi_nand_chip_sel {
+ u8 cs;
+ struct sunxi_nand_rb rb;
+};
+
+/*
+ * sunxi HW ECC infos: stores information related to HW ECC support
+ *
+ * @mode: the sunxi ECC mode field deduced from ECC requirements
+ * @layout: the OOB layout depending on the ECC requirements and the
+ * selected ECC mode
+ */
+struct sunxi_nand_hw_ecc {
+ int mode;
+ struct nand_ecclayout layout;
+};
+
+/*
+ * NAND chip structure: stores NAND chip device related information
+ *
+ * @node: used to store NAND chips into a list
+ * @nand: base NAND chip structure
+ * @mtd: base MTD structure
+ * @clk_rate: clk_rate required for this NAND chip
+ * @timing_cfg TIMING_CFG register value for this NAND chip
+ * @selected: current active CS
+ * @nsels: number of CS lines required by the NAND chip
+ * @sels: array of CS lines descriptions
+ */
+struct sunxi_nand_chip {
+ struct list_head node;
+ struct nand_chip nand;
+ unsigned long clk_rate;
+ u32 timing_cfg;
+ u32 timing_ctl;
+ int selected;
+ int addr_cycles;
+ u32 addr[2];
+ int cmd_cycles;
+ u8 cmd[2];
+ int nsels;
+ struct sunxi_nand_chip_sel sels[0];
+};
+
+static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand)
+{
+ return container_of(nand, struct sunxi_nand_chip, nand);
+}
+
+/*
+ * NAND Controller structure: stores sunxi NAND controller information
+ *
+ * @controller: base controller structure
+ * @dev: parent device (used to print error messages)
+ * @regs: NAND controller registers
+ * @ahb_clk: NAND Controller AHB clock
+ * @mod_clk: NAND Controller mod clock
+ * @assigned_cs: bitmask describing already assigned CS lines
+ * @clk_rate: NAND controller current clock rate
+ * @chips: a list containing all the NAND chips attached to
+ * this NAND controller
+ * @complete: a completion object used to wait for NAND
+ * controller events
+ */
+struct sunxi_nfc {
+ struct nand_hw_control controller;
+ struct device *dev;
+ void __iomem *regs;
+ struct clk *ahb_clk;
+ struct clk *mod_clk;
+ unsigned long assigned_cs;
+ unsigned long clk_rate;
+ struct list_head chips;
+};
+
+static inline struct sunxi_nfc *to_sunxi_nfc(struct nand_hw_control *ctrl)
+{
+ return container_of(ctrl, struct sunxi_nfc, controller);
+}
+
+static void sunxi_nfc_set_clk_rate(unsigned long hz)
+{
+ struct sunxi_ccm_reg *const ccm =
+ (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+ int div_m, div_n;
+
+ div_m = (clock_get_pll6() + hz - 1) / hz;
+ for (div_n = 0; div_n < 3 && div_m > 16; div_n++) {
+ if (div_m % 2)
+ div_m++;
+ div_m >>= 1;
+ }
+ if (div_m > 16)
+ div_m = 16;
+
+ /* config mod clock */
+ writel(CCM_NAND_CTRL_ENABLE | CCM_NAND_CTRL_PLL6 |
+ CCM_NAND_CTRL_N(div_n) | CCM_NAND_CTRL_M(div_m),
+ &ccm->nand0_clk_cfg);
+
+ /* gate on nand clock */
+ setbits_le32(&ccm->ahb_gate0, (1 << AHB_GATE_OFFSET_NAND0));
+#ifdef CONFIG_MACH_SUN9I
+ setbits_le32(&ccm->ahb_gate1, (1 << AHB_GATE_OFFSET_DMA));
+#else
+ setbits_le32(&ccm->ahb_gate0, (1 << AHB_GATE_OFFSET_DMA));
+#endif
+}
+
+static int sunxi_nfc_wait_int(struct sunxi_nfc *nfc, u32 flags,
+ unsigned int timeout_ms)
+{
+ unsigned int timeout_ticks;
+ u32 time_start, status;
+ int ret = -ETIMEDOUT;
+
+ if (!timeout_ms)
+ timeout_ms = NFC_DEFAULT_TIMEOUT_MS;
+
+ timeout_ticks = (timeout_ms * CONFIG_SYS_HZ) / 1000;
+
+ time_start = get_timer(0);
+
+ do {
+ status = readl(nfc->regs + NFC_REG_ST);
+ if ((status & flags) == flags) {
+ ret = 0;
+ break;
+ }
+
+ udelay(1);
+ } while (get_timer(time_start) < timeout_ticks);
+
+ writel(status & flags, nfc->regs + NFC_REG_ST);
+
+ return ret;
+}
+
+static int sunxi_nfc_wait_cmd_fifo_empty(struct sunxi_nfc *nfc)
+{
+ unsigned long timeout = (CONFIG_SYS_HZ *
+ NFC_DEFAULT_TIMEOUT_MS) / 1000;
+ u32 time_start;
+
+ time_start = get_timer(0);
+ do {
+ if (!(readl(nfc->regs + NFC_REG_ST) & NFC_CMD_FIFO_STATUS))
+ return 0;
+ } while (get_timer(time_start) < timeout);
+
+ dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n");
+ return -ETIMEDOUT;
+}
+
+static int sunxi_nfc_rst(struct sunxi_nfc *nfc)
+{
+ unsigned long timeout = (CONFIG_SYS_HZ *
+ NFC_DEFAULT_TIMEOUT_MS) / 1000;
+ u32 time_start;
+
+ writel(0, nfc->regs + NFC_REG_ECC_CTL);
+ writel(NFC_RESET, nfc->regs + NFC_REG_CTL);
+
+ time_start = get_timer(0);
+ do {
+ if (!(readl(nfc->regs + NFC_REG_CTL) & NFC_RESET))
+ return 0;
+ } while (get_timer(time_start) < timeout);
+
+ dev_err(nfc->dev, "wait for NAND controller reset timedout\n");
+ return -ETIMEDOUT;
+}
+
+static int sunxi_nfc_dev_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
+ struct sunxi_nand_rb *rb;
+ unsigned long timeo = (sunxi_nand->nand.state == FL_ERASING ? 400 : 20);
+ int ret;
+
+ if (sunxi_nand->selected < 0)
+ return 0;
+
+ rb = &sunxi_nand->sels[sunxi_nand->selected].rb;
+
+ switch (rb->type) {
+ case RB_NATIVE:
+ ret = !!(readl(nfc->regs + NFC_REG_ST) &
+ NFC_RB_STATE(rb->info.nativeid));
+ if (ret)
+ break;
+
+ sunxi_nfc_wait_int(nfc, NFC_RB_B2R, timeo);
+ ret = !!(readl(nfc->regs + NFC_REG_ST) &
+ NFC_RB_STATE(rb->info.nativeid));
+ break;
+ case RB_GPIO:
+ ret = dm_gpio_get_value(&rb->info.gpio);
+ break;
+ case RB_NONE:
+ default:
+ ret = 0;
+ dev_err(nfc->dev, "cannot check R/B NAND status!\n");
+ break;
+ }
+
+ return ret;
+}
+
+static void sunxi_nfc_select_chip(struct mtd_info *mtd, int chip)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
+ struct sunxi_nand_chip_sel *sel;
+ u32 ctl;
+
+ if (chip > 0 && chip >= sunxi_nand->nsels)
+ return;
+
+ if (chip == sunxi_nand->selected)
+ return;
+
+ ctl = readl(nfc->regs + NFC_REG_CTL) &
+ ~(NFC_PAGE_SHIFT_MSK | NFC_CE_SEL_MSK | NFC_RB_SEL_MSK | NFC_EN);
+
+ if (chip >= 0) {
+ sel = &sunxi_nand->sels[chip];
+
+ ctl |= NFC_CE_SEL(sel->cs) | NFC_EN |
+ NFC_PAGE_SHIFT(nand->page_shift - 10);
+ if (sel->rb.type == RB_NONE) {
+ nand->dev_ready = NULL;
+ } else {
+ nand->dev_ready = sunxi_nfc_dev_ready;
+ if (sel->rb.type == RB_NATIVE)
+ ctl |= NFC_RB_SEL(sel->rb.info.nativeid);
+ }
+
+ writel(mtd->writesize, nfc->regs + NFC_REG_SPARE_AREA);
+
+ if (nfc->clk_rate != sunxi_nand->clk_rate) {
+ sunxi_nfc_set_clk_rate(sunxi_nand->clk_rate);
+ nfc->clk_rate = sunxi_nand->clk_rate;
+ }
+ }
+
+ writel(sunxi_nand->timing_ctl, nfc->regs + NFC_REG_TIMING_CTL);
+ writel(sunxi_nand->timing_cfg, nfc->regs + NFC_REG_TIMING_CFG);
+ writel(ctl, nfc->regs + NFC_REG_CTL);
+
+ sunxi_nand->selected = chip;
+}
+
+static void sunxi_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
+ int ret;
+ int cnt;
+ int offs = 0;
+ u32 tmp;
+
+ while (len > offs) {
+ cnt = min(len - offs, NFC_SRAM_SIZE);
+
+ ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
+ if (ret)
+ break;
+
+ writel(cnt, nfc->regs + NFC_REG_CNT);
+ tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD;
+ writel(tmp, nfc->regs + NFC_REG_CMD);
+
+ ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
+ if (ret)
+ break;
+
+ if (buf)
+ memcpy_fromio(buf + offs, nfc->regs + NFC_RAM0_BASE,
+ cnt);
+ offs += cnt;
+ }
+}
+
+static void sunxi_nfc_write_buf(struct mtd_info *mtd, const uint8_t *buf,
+ int len)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
+ int ret;
+ int cnt;
+ int offs = 0;
+ u32 tmp;
+
+ while (len > offs) {
+ cnt = min(len - offs, NFC_SRAM_SIZE);
+
+ ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
+ if (ret)
+ break;
+
+ writel(cnt, nfc->regs + NFC_REG_CNT);
+ memcpy_toio(nfc->regs + NFC_RAM0_BASE, buf + offs, cnt);
+ tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD |
+ NFC_ACCESS_DIR;
+ writel(tmp, nfc->regs + NFC_REG_CMD);
+
+ ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
+ if (ret)
+ break;
+
+ offs += cnt;
+ }
+}
+
+static uint8_t sunxi_nfc_read_byte(struct mtd_info *mtd)
+{
+ uint8_t ret;
+
+ sunxi_nfc_read_buf(mtd, &ret, 1);
+
+ return ret;
+}
+
+static void sunxi_nfc_cmd_ctrl(struct mtd_info *mtd, int dat,
+ unsigned int ctrl)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
+ int ret;
+ u32 tmp;
+
+ ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
+ if (ret)
+ return;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ tmp = readl(nfc->regs + NFC_REG_CTL);
+ if (ctrl & NAND_NCE)
+ tmp |= NFC_CE_CTL;
+ else
+ tmp &= ~NFC_CE_CTL;
+ writel(tmp, nfc->regs + NFC_REG_CTL);
+ }
+
+ if (dat == NAND_CMD_NONE && (ctrl & NAND_NCE) &&
+ !(ctrl & (NAND_CLE | NAND_ALE))) {
+ u32 cmd = 0;
+
+ if (!sunxi_nand->addr_cycles && !sunxi_nand->cmd_cycles)
+ return;
+
+ if (sunxi_nand->cmd_cycles--)
+ cmd |= NFC_SEND_CMD1 | sunxi_nand->cmd[0];
+
+ if (sunxi_nand->cmd_cycles--) {
+ cmd |= NFC_SEND_CMD2;
+ writel(sunxi_nand->cmd[1],
+ nfc->regs + NFC_REG_RCMD_SET);
+ }
+
+ sunxi_nand->cmd_cycles = 0;
+
+ if (sunxi_nand->addr_cycles) {
+ cmd |= NFC_SEND_ADR |
+ NFC_ADR_NUM(sunxi_nand->addr_cycles);
+ writel(sunxi_nand->addr[0],
+ nfc->regs + NFC_REG_ADDR_LOW);
+ }
+
+ if (sunxi_nand->addr_cycles > 4)
+ writel(sunxi_nand->addr[1],
+ nfc->regs + NFC_REG_ADDR_HIGH);
+
+ writel(cmd, nfc->regs + NFC_REG_CMD);
+ sunxi_nand->addr[0] = 0;
+ sunxi_nand->addr[1] = 0;
+ sunxi_nand->addr_cycles = 0;
+ sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
+ }
+
+ if (ctrl & NAND_CLE) {
+ sunxi_nand->cmd[sunxi_nand->cmd_cycles++] = dat;
+ } else if (ctrl & NAND_ALE) {
+ sunxi_nand->addr[sunxi_nand->addr_cycles / 4] |=
+ dat << ((sunxi_nand->addr_cycles % 4) * 8);
+ sunxi_nand->addr_cycles++;
+ }
+}
+
+/* These seed values have been extracted from Allwinner's BSP */
+static const u16 sunxi_nfc_randomizer_page_seeds[] = {
+ 0x2b75, 0x0bd0, 0x5ca3, 0x62d1, 0x1c93, 0x07e9, 0x2162, 0x3a72,
+ 0x0d67, 0x67f9, 0x1be7, 0x077d, 0x032f, 0x0dac, 0x2716, 0x2436,
+ 0x7922, 0x1510, 0x3860, 0x5287, 0x480f, 0x4252, 0x1789, 0x5a2d,
+ 0x2a49, 0x5e10, 0x437f, 0x4b4e, 0x2f45, 0x216e, 0x5cb7, 0x7130,
+ 0x2a3f, 0x60e4, 0x4dc9, 0x0ef0, 0x0f52, 0x1bb9, 0x6211, 0x7a56,
+ 0x226d, 0x4ea7, 0x6f36, 0x3692, 0x38bf, 0x0c62, 0x05eb, 0x4c55,
+ 0x60f4, 0x728c, 0x3b6f, 0x2037, 0x7f69, 0x0936, 0x651a, 0x4ceb,
+ 0x6218, 0x79f3, 0x383f, 0x18d9, 0x4f05, 0x5c82, 0x2912, 0x6f17,
+ 0x6856, 0x5938, 0x1007, 0x61ab, 0x3e7f, 0x57c2, 0x542f, 0x4f62,
+ 0x7454, 0x2eac, 0x7739, 0x42d4, 0x2f90, 0x435a, 0x2e52, 0x2064,
+ 0x637c, 0x66ad, 0x2c90, 0x0bad, 0x759c, 0x0029, 0x0986, 0x7126,
+ 0x1ca7, 0x1605, 0x386a, 0x27f5, 0x1380, 0x6d75, 0x24c3, 0x0f8e,
+ 0x2b7a, 0x1418, 0x1fd1, 0x7dc1, 0x2d8e, 0x43af, 0x2267, 0x7da3,
+ 0x4e3d, 0x1338, 0x50db, 0x454d, 0x764d, 0x40a3, 0x42e6, 0x262b,
+ 0x2d2e, 0x1aea, 0x2e17, 0x173d, 0x3a6e, 0x71bf, 0x25f9, 0x0a5d,
+ 0x7c57, 0x0fbe, 0x46ce, 0x4939, 0x6b17, 0x37bb, 0x3e91, 0x76db,
+};
+
+/*
+ * sunxi_nfc_randomizer_ecc512_seeds and sunxi_nfc_randomizer_ecc1024_seeds
+ * have been generated using
+ * sunxi_nfc_randomizer_step(seed, (step_size * 8) + 15), which is what
+ * the randomizer engine does internally before de/scrambling OOB data.
+ *
+ * Those tables are statically defined to avoid calculating randomizer state
+ * at runtime.
+ */
+static const u16 sunxi_nfc_randomizer_ecc512_seeds[] = {
+ 0x3346, 0x367f, 0x1f18, 0x769a, 0x4f64, 0x068c, 0x2ef1, 0x6b64,
+ 0x28a9, 0x15d7, 0x30f8, 0x3659, 0x53db, 0x7c5f, 0x71d4, 0x4409,
+ 0x26eb, 0x03cc, 0x655d, 0x47d4, 0x4daa, 0x0877, 0x712d, 0x3617,
+ 0x3264, 0x49aa, 0x7f9e, 0x588e, 0x4fbc, 0x7176, 0x7f91, 0x6c6d,
+ 0x4b95, 0x5fb7, 0x3844, 0x4037, 0x0184, 0x081b, 0x0ee8, 0x5b91,
+ 0x293d, 0x1f71, 0x0e6f, 0x402b, 0x5122, 0x1e52, 0x22be, 0x3d2d,
+ 0x75bc, 0x7c60, 0x6291, 0x1a2f, 0x61d4, 0x74aa, 0x4140, 0x29ab,
+ 0x472d, 0x2852, 0x017e, 0x15e8, 0x5ec2, 0x17cf, 0x7d0f, 0x06b8,
+ 0x117a, 0x6b94, 0x789b, 0x3126, 0x6ac5, 0x5be7, 0x150f, 0x51f8,
+ 0x7889, 0x0aa5, 0x663d, 0x77e8, 0x0b87, 0x3dcb, 0x360d, 0x218b,
+ 0x512f, 0x7dc9, 0x6a4d, 0x630a, 0x3547, 0x1dd2, 0x5aea, 0x69a5,
+ 0x7bfa, 0x5e4f, 0x1519, 0x6430, 0x3a0e, 0x5eb3, 0x5425, 0x0c7a,
+ 0x5540, 0x3670, 0x63c1, 0x31e9, 0x5a39, 0x2de7, 0x5979, 0x2891,
+ 0x1562, 0x014b, 0x5b05, 0x2756, 0x5a34, 0x13aa, 0x6cb5, 0x2c36,
+ 0x5e72, 0x1306, 0x0861, 0x15ef, 0x1ee8, 0x5a37, 0x7ac4, 0x45dd,
+ 0x44c4, 0x7266, 0x2f41, 0x3ccc, 0x045e, 0x7d40, 0x7c66, 0x0fa0,
+};
+
+static const u16 sunxi_nfc_randomizer_ecc1024_seeds[] = {
+ 0x2cf5, 0x35f1, 0x63a4, 0x5274, 0x2bd2, 0x778b, 0x7285, 0x32b6,
+ 0x6a5c, 0x70d6, 0x757d, 0x6769, 0x5375, 0x1e81, 0x0cf3, 0x3982,
+ 0x6787, 0x042a, 0x6c49, 0x1925, 0x56a8, 0x40a9, 0x063e, 0x7bd9,
+ 0x4dbf, 0x55ec, 0x672e, 0x7334, 0x5185, 0x4d00, 0x232a, 0x7e07,
+ 0x445d, 0x6b92, 0x528f, 0x4255, 0x53ba, 0x7d82, 0x2a2e, 0x3a4e,
+ 0x75eb, 0x450c, 0x6844, 0x1b5d, 0x581a, 0x4cc6, 0x0379, 0x37b2,
+ 0x419f, 0x0e92, 0x6b27, 0x5624, 0x01e3, 0x07c1, 0x44a5, 0x130c,
+ 0x13e8, 0x5910, 0x0876, 0x60c5, 0x54e3, 0x5b7f, 0x2269, 0x509f,
+ 0x7665, 0x36fd, 0x3e9a, 0x0579, 0x6295, 0x14ef, 0x0a81, 0x1bcc,
+ 0x4b16, 0x64db, 0x0514, 0x4f07, 0x0591, 0x3576, 0x6853, 0x0d9e,
+ 0x259f, 0x38b7, 0x64fb, 0x3094, 0x4693, 0x6ddd, 0x29bb, 0x0bc8,
+ 0x3f47, 0x490e, 0x0c0e, 0x7933, 0x3c9e, 0x5840, 0x398d, 0x3e68,
+ 0x4af1, 0x71f5, 0x57cf, 0x1121, 0x64eb, 0x3579, 0x15ac, 0x584d,
+ 0x5f2a, 0x47e2, 0x6528, 0x6eac, 0x196e, 0x6b96, 0x0450, 0x0179,
+ 0x609c, 0x06e1, 0x4626, 0x42c7, 0x273e, 0x486f, 0x0705, 0x1601,
+ 0x145b, 0x407e, 0x062b, 0x57a5, 0x53f9, 0x5659, 0x4410, 0x3ccd,
+};
+
+static u16 sunxi_nfc_randomizer_step(u16 state, int count)
+{
+ state &= 0x7fff;
+
+ /*
+ * This loop is just a simple implementation of a Fibonacci LFSR using
+ * the x16 + x15 + 1 polynomial.
+ */
+ while (count--)
+ state = ((state >> 1) |
+ (((state ^ (state >> 1)) & 1) << 14)) & 0x7fff;
+
+ return state;
+}
+
+static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc)
+{
+ const u16 *seeds = sunxi_nfc_randomizer_page_seeds;
+ int mod = mtd->erasesize / mtd->writesize;
+
+ if (mod > ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds))
+ mod = ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds);
+
+ if (ecc) {
+ if (mtd->ecc_step_size == 512)
+ seeds = sunxi_nfc_randomizer_ecc512_seeds;
+ else
+ seeds = sunxi_nfc_randomizer_ecc1024_seeds;
+ }
+
+ return seeds[page % mod];
+}
+
+static void sunxi_nfc_randomizer_config(struct mtd_info *mtd,
+ int page, bool ecc)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+ u32 ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
+ u16 state;
+
+ if (!(nand->options & NAND_NEED_SCRAMBLING))
+ return;
+
+ ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
+ state = sunxi_nfc_randomizer_state(mtd, page, ecc);
+ ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_SEED_MSK;
+ writel(ecc_ctl | NFC_RANDOM_SEED(state), nfc->regs + NFC_REG_ECC_CTL);
+}
+
+static void sunxi_nfc_randomizer_enable(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+
+ if (!(nand->options & NAND_NEED_SCRAMBLING))
+ return;
+
+ writel(readl(nfc->regs + NFC_REG_ECC_CTL) | NFC_RANDOM_EN,
+ nfc->regs + NFC_REG_ECC_CTL);
+}
+
+static void sunxi_nfc_randomizer_disable(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+
+ if (!(nand->options & NAND_NEED_SCRAMBLING))
+ return;
+
+ writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_EN,
+ nfc->regs + NFC_REG_ECC_CTL);
+}
+
+static void sunxi_nfc_randomize_bbm(struct mtd_info *mtd, int page, u8 *bbm)
+{
+ u16 state = sunxi_nfc_randomizer_state(mtd, page, true);
+
+ bbm[0] ^= state;
+ bbm[1] ^= sunxi_nfc_randomizer_step(state, 8);
+}
+
+static void sunxi_nfc_randomizer_write_buf(struct mtd_info *mtd,
+ const uint8_t *buf, int len,
+ bool ecc, int page)
+{
+ sunxi_nfc_randomizer_config(mtd, page, ecc);
+ sunxi_nfc_randomizer_enable(mtd);
+ sunxi_nfc_write_buf(mtd, buf, len);
+ sunxi_nfc_randomizer_disable(mtd);
+}
+
+static void sunxi_nfc_randomizer_read_buf(struct mtd_info *mtd, uint8_t *buf,
+ int len, bool ecc, int page)
+{
+ sunxi_nfc_randomizer_config(mtd, page, ecc);
+ sunxi_nfc_randomizer_enable(mtd);
+ sunxi_nfc_read_buf(mtd, buf, len);
+ sunxi_nfc_randomizer_disable(mtd);
+}
+
+static void sunxi_nfc_hw_ecc_enable(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+ struct sunxi_nand_hw_ecc *data = nand->ecc.priv;
+ u32 ecc_ctl;
+
+ ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
+ ecc_ctl &= ~(NFC_ECC_MODE_MSK | NFC_ECC_PIPELINE |
+ NFC_ECC_BLOCK_SIZE_MSK);
+ ecc_ctl |= NFC_ECC_EN | NFC_ECC_MODE(data->mode) | NFC_ECC_EXCEPTION;
+
+ if (nand->ecc.size == 512)
+ ecc_ctl |= NFC_ECC_BLOCK_512;
+
+ writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);
+}
+
+static void sunxi_nfc_hw_ecc_disable(struct mtd_info *mtd)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+
+ writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_ECC_EN,
+ nfc->regs + NFC_REG_ECC_CTL);
+}
+
+static inline void sunxi_nfc_user_data_to_buf(u32 user_data, u8 *buf)
+{
+ buf[0] = user_data;
+ buf[1] = user_data >> 8;
+ buf[2] = user_data >> 16;
+ buf[3] = user_data >> 24;
+}
+
+static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
+ u8 *data, int data_off,
+ u8 *oob, int oob_off,
+ int *cur_off,
+ unsigned int *max_bitflips,
+ bool bbm, int page)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+ struct nand_ecc_ctrl *ecc = &nand->ecc;
+ int raw_mode = 0;
+ u32 status;
+ int ret;
+
+ if (*cur_off != data_off)
+ nand->cmdfunc(mtd, NAND_CMD_RNDOUT, data_off, -1);
+
+ sunxi_nfc_randomizer_read_buf(mtd, NULL, ecc->size, false, page);
+
+ if (data_off + ecc->size != oob_off)
+ nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1);
+
+ ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
+ if (ret)
+ return ret;
+
+ sunxi_nfc_randomizer_enable(mtd);
+ writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP,
+ nfc->regs + NFC_REG_CMD);
+
+ ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
+ sunxi_nfc_randomizer_disable(mtd);
+ if (ret)
+ return ret;
+
+ *cur_off = oob_off + ecc->bytes + 4;
+
+ status = readl(nfc->regs + NFC_REG_ECC_ST);
+ if (status & NFC_ECC_PAT_FOUND(0)) {
+ u8 pattern = 0xff;
+
+ if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID) & 0x1)))
+ pattern = 0x0;
+
+ memset(data, pattern, ecc->size);
+ memset(oob, pattern, ecc->bytes + 4);
+
+ return 1;
+ }
+
+ ret = NFC_ECC_ERR_CNT(0, readl(nfc->regs + NFC_REG_ECC_ERR_CNT(0)));
+
+ memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, ecc->size);
+
+ nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1);
+ sunxi_nfc_randomizer_read_buf(mtd, oob, ecc->bytes + 4, true, page);
+
+ if (status & NFC_ECC_ERR(0)) {
+ /*
+ * Re-read the data with the randomizer disabled to identify
+ * bitflips in erased pages.
+ */
+ if (nand->options & NAND_NEED_SCRAMBLING) {
+ nand->cmdfunc(mtd, NAND_CMD_RNDOUT, data_off, -1);
+ nand->read_buf(mtd, data, ecc->size);
+ nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1);
+ nand->read_buf(mtd, oob, ecc->bytes + 4);
+ }
+
+ ret = nand_check_erased_ecc_chunk(data, ecc->size,
+ oob, ecc->bytes + 4,
+ NULL, 0, ecc->strength);
+ if (ret >= 0)
+ raw_mode = 1;
+ } else {
+ /*
+ * The engine protects 4 bytes of OOB data per chunk.
+ * Retrieve the corrected OOB bytes.
+ */
+ sunxi_nfc_user_data_to_buf(readl(nfc->regs +
+ NFC_REG_USER_DATA(0)),
+ oob);
+
+ /* De-randomize the Bad Block Marker. */
+ if (bbm && nand->options & NAND_NEED_SCRAMBLING)
+ sunxi_nfc_randomize_bbm(mtd, page, oob);
+ }
+
+ if (ret < 0) {
+ mtd->ecc_stats.failed++;
+ } else {
+ mtd->ecc_stats.corrected += ret;
+ *max_bitflips = max_t(unsigned int, *max_bitflips, ret);
+ }
+
+ return raw_mode;
+}
+
+static void sunxi_nfc_hw_ecc_read_extra_oob(struct mtd_info *mtd,
+ u8 *oob, int *cur_off,
+ bool randomize, int page)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct nand_ecc_ctrl *ecc = &nand->ecc;
+ int offset = ((ecc->bytes + 4) * ecc->steps);
+ int len = mtd->oobsize - offset;
+
+ if (len <= 0)
+ return;
+
+ if (*cur_off != offset)
+ nand->cmdfunc(mtd, NAND_CMD_RNDOUT,
+ offset + mtd->writesize, -1);
+
+ if (!randomize)
+ sunxi_nfc_read_buf(mtd, oob + offset, len);
+ else
+ sunxi_nfc_randomizer_read_buf(mtd, oob + offset, len,
+ false, page);
+
+ *cur_off = mtd->oobsize + mtd->writesize;
+}
+
+static inline u32 sunxi_nfc_buf_to_user_data(const u8 *buf)
+{
+ return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
+}
+
+static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd,
+ const u8 *data, int data_off,
+ const u8 *oob, int oob_off,
+ int *cur_off, bool bbm,
+ int page)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
+ struct nand_ecc_ctrl *ecc = &nand->ecc;
+ int ret;
+
+ if (data_off != *cur_off)
+ nand->cmdfunc(mtd, NAND_CMD_RNDIN, data_off, -1);
+
+ sunxi_nfc_randomizer_write_buf(mtd, data, ecc->size, false, page);
+
+ /* Fill OOB data in */
+ if ((nand->options & NAND_NEED_SCRAMBLING) && bbm) {
+ u8 user_data[4];
+
+ memcpy(user_data, oob, 4);
+ sunxi_nfc_randomize_bbm(mtd, page, user_data);
+ writel(sunxi_nfc_buf_to_user_data(user_data),
+ nfc->regs + NFC_REG_USER_DATA(0));
+ } else {
+ writel(sunxi_nfc_buf_to_user_data(oob),
+ nfc->regs + NFC_REG_USER_DATA(0));
+ }
+
+ if (data_off + ecc->size != oob_off)
+ nand->cmdfunc(mtd, NAND_CMD_RNDIN, oob_off, -1);
+
+ ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
+ if (ret)
+ return ret;
+
+ sunxi_nfc_randomizer_enable(mtd);
+ writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD |
+ NFC_ACCESS_DIR | NFC_ECC_OP,
+ nfc->regs + NFC_REG_CMD);
+
+ ret = sunxi_nfc_wait_int(nfc, NFC_CMD_INT_FLAG, 0);
+ sunxi_nfc_randomizer_disable(mtd);
+ if (ret)
+ return ret;
+
+ *cur_off = oob_off + ecc->bytes + 4;
+
+ return 0;
+}
+
+static void sunxi_nfc_hw_ecc_write_extra_oob(struct mtd_info *mtd,
+ u8 *oob, int *cur_off,
+ int page)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ struct nand_ecc_ctrl *ecc = &nand->ecc;
+ int offset = ((ecc->bytes + 4) * ecc->steps);
+ int len = mtd->oobsize - offset;
+
+ if (len <= 0)
+ return;
+
+ if (*cur_off != offset)
+ nand->cmdfunc(mtd, NAND_CMD_RNDIN,
+ offset + mtd->writesize, -1);
+
+ sunxi_nfc_randomizer_write_buf(mtd, oob + offset, len, false, page);
+
+ *cur_off = mtd->oobsize + mtd->writesize;
+}
+
+static int sunxi_nfc_hw_ecc_read_page(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf,
+ int oob_required, int page)
+{
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+ unsigned int max_bitflips = 0;
+ int ret, i, cur_off = 0;
+ bool raw_mode = false;
+
+ sunxi_nfc_hw_ecc_enable(mtd);
+
+ for (i = 0; i < ecc->steps; i++) {
+ int data_off = i * ecc->size;
+ int oob_off = i * (ecc->bytes + 4);
+ u8 *data = buf + data_off;
+ u8 *oob = chip->oob_poi + oob_off;
+
+ ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob,
+ oob_off + mtd->writesize,
+ &cur_off, &max_bitflips,
+ !i, page);
+ if (ret < 0)
+ return ret;
+ else if (ret)
+ raw_mode = true;
+ }
+
+ if (oob_required)
+ sunxi_nfc_hw_ecc_read_extra_oob(mtd, chip->oob_poi, &cur_off,
+ !raw_mode, page);
+
+ sunxi_nfc_hw_ecc_disable(mtd);
+
+ return max_bitflips;
+}
+
+static int sunxi_nfc_hw_ecc_read_subpage(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ uint32_t data_offs, uint32_t readlen,
+ uint8_t *bufpoi, int page)
+{
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+ int ret, i, cur_off = 0;
+ unsigned int max_bitflips = 0;
+
+ sunxi_nfc_hw_ecc_enable(mtd);
+
+ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
+ for (i = data_offs / ecc->size;
+ i < DIV_ROUND_UP(data_offs + readlen, ecc->size); i++) {
+ int data_off = i * ecc->size;
+ int oob_off = i * (ecc->bytes + 4);
+ u8 *data = bufpoi + data_off;
+ u8 *oob = chip->oob_poi + oob_off;
+
+ ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off,
+ oob, oob_off + mtd->writesize,
+ &cur_off, &max_bitflips, !i, page);
+ if (ret < 0)
+ return ret;
+ }
+
+ sunxi_nfc_hw_ecc_disable(mtd);
+
+ return max_bitflips;
+}
+
+static int sunxi_nfc_hw_ecc_write_page(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ const uint8_t *buf, int oob_required,
+ int page)
+{
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+ int ret, i, cur_off = 0;
+
+ sunxi_nfc_hw_ecc_enable(mtd);
+
+ for (i = 0; i < ecc->steps; i++) {
+ int data_off = i * ecc->size;
+ int oob_off = i * (ecc->bytes + 4);
+ const u8 *data = buf + data_off;
+ const u8 *oob = chip->oob_poi + oob_off;
+
+ ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
+ oob_off + mtd->writesize,
+ &cur_off, !i, page);
+ if (ret)
+ return ret;
+ }
+
+ if (oob_required || (chip->options & NAND_NEED_SCRAMBLING))
+ sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi,
+ &cur_off, page);
+
+ sunxi_nfc_hw_ecc_disable(mtd);
+
+ return 0;
+}
+
+static int sunxi_nfc_hw_ecc_write_subpage(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ u32 data_offs, u32 data_len,
+ const u8 *buf, int oob_required,
+ int page)
+{
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+ int ret, i, cur_off = 0;
+
+ sunxi_nfc_hw_ecc_enable(mtd);
+
+ for (i = data_offs / ecc->size;
+ i < DIV_ROUND_UP(data_offs + data_len, ecc->size); i++) {
+ int data_off = i * ecc->size;
+ int oob_off = i * (ecc->bytes + 4);
+ const u8 *data = buf + data_off;
+ const u8 *oob = chip->oob_poi + oob_off;
+
+ ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob,
+ oob_off + mtd->writesize,
+ &cur_off, !i, page);
+ if (ret)
+ return ret;
+ }
+
+ sunxi_nfc_hw_ecc_disable(mtd);
+
+ return 0;
+}
+
+static int sunxi_nfc_hw_syndrome_ecc_read_page(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ uint8_t *buf, int oob_required,
+ int page)
+{
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+ unsigned int max_bitflips = 0;
+ int ret, i, cur_off = 0;
+ bool raw_mode = false;
+
+ sunxi_nfc_hw_ecc_enable(mtd);
+
+ for (i = 0; i < ecc->steps; i++) {
+ int data_off = i * (ecc->size + ecc->bytes + 4);
+ int oob_off = data_off + ecc->size;
+ u8 *data = buf + (i * ecc->size);
+ u8 *oob = chip->oob_poi + (i * (ecc->bytes + 4));
+
+ ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob,
+ oob_off, &cur_off,
+ &max_bitflips, !i, page);
+ if (ret < 0)
+ return ret;
+ else if (ret)
+ raw_mode = true;
+ }
+
+ if (oob_required)
+ sunxi_nfc_hw_ecc_read_extra_oob(mtd, chip->oob_poi, &cur_off,
+ !raw_mode, page);
+
+ sunxi_nfc_hw_ecc_disable(mtd);
+
+ return max_bitflips;
+}
+
+static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd,
+ struct nand_chip *chip,
+ const uint8_t *buf,
+ int oob_required, int page)
+{
+ struct nand_ecc_ctrl *ecc = &chip->ecc;
+ int ret, i, cur_off = 0;
+
+ sunxi_nfc_hw_ecc_enable(mtd);
+
+ for (i = 0; i < ecc->steps; i++) {
+ int data_off = i * (ecc->size + ecc->bytes + 4);
+ int oob_off = data_off + ecc->size;
+ const u8 *data = buf + (i * ecc->size);
+ const u8 *oob = chip->oob_poi + (i * (ecc->bytes + 4));
+
+ ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off,
+ oob, oob_off, &cur_off,
+ false, page);
+ if (ret)
+ return ret;
+ }
+
+ if (oob_required || (chip->options & NAND_NEED_SCRAMBLING))
+ sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi,
+ &cur_off, page);
+
+ sunxi_nfc_hw_ecc_disable(mtd);
+
+ return 0;
+}
+
+static const s32 tWB_lut[] = {6, 12, 16, 20};
+static const s32 tRHW_lut[] = {4, 8, 12, 20};
+
+static int _sunxi_nand_lookup_timing(const s32 *lut, int lut_size, u32 duration,
+ u32 clk_period)
+{
+ u32 clk_cycles = DIV_ROUND_UP(duration, clk_period);
+ int i;
+
+ for (i = 0; i < lut_size; i++) {
+ if (clk_cycles <= lut[i])
+ return i;
+ }
+
+ /* Doesn't fit */
+ return -EINVAL;
+}
+
+#define sunxi_nand_lookup_timing(l, p, c) \
+ _sunxi_nand_lookup_timing(l, ARRAY_SIZE(l), p, c)
+
+static int sunxi_nand_chip_set_timings(struct sunxi_nand_chip *chip,
+ const struct nand_sdr_timings *timings)
+{
+ u32 min_clk_period = 0;
+ s32 tWB, tADL, tWHR, tRHW, tCAD;
+
+ /* T1 <=> tCLS */
+ if (timings->tCLS_min > min_clk_period)
+ min_clk_period = timings->tCLS_min;
+
+ /* T2 <=> tCLH */
+ if (timings->tCLH_min > min_clk_period)
+ min_clk_period = timings->tCLH_min;
+
+ /* T3 <=> tCS */
+ if (timings->tCS_min > min_clk_period)
+ min_clk_period = timings->tCS_min;
+
+ /* T4 <=> tCH */
+ if (timings->tCH_min > min_clk_period)
+ min_clk_period = timings->tCH_min;
+
+ /* T5 <=> tWP */
+ if (timings->tWP_min > min_clk_period)
+ min_clk_period = timings->tWP_min;
+
+ /* T6 <=> tWH */
+ if (timings->tWH_min > min_clk_period)
+ min_clk_period = timings->tWH_min;
+
+ /* T7 <=> tALS */
+ if (timings->tALS_min > min_clk_period)
+ min_clk_period = timings->tALS_min;
+
+ /* T8 <=> tDS */
+ if (timings->tDS_min > min_clk_period)
+ min_clk_period = timings->tDS_min;
+
+ /* T9 <=> tDH */
+ if (timings->tDH_min > min_clk_period)
+ min_clk_period = timings->tDH_min;
+
+ /* T10 <=> tRR */
+ if (timings->tRR_min > (min_clk_period * 3))
+ min_clk_period = DIV_ROUND_UP(timings->tRR_min, 3);
+
+ /* T11 <=> tALH */
+ if (timings->tALH_min > min_clk_period)
+ min_clk_period = timings->tALH_min;
+
+ /* T12 <=> tRP */
+ if (timings->tRP_min > min_clk_period)
+ min_clk_period = timings->tRP_min;
+
+ /* T13 <=> tREH */
+ if (timings->tREH_min > min_clk_period)
+ min_clk_period = timings->tREH_min;
+
+ /* T14 <=> tRC */
+ if (timings->tRC_min > (min_clk_period * 2))
+ min_clk_period = DIV_ROUND_UP(timings->tRC_min, 2);
+
+ /* T15 <=> tWC */
+ if (timings->tWC_min > (min_clk_period * 2))
+ min_clk_period = DIV_ROUND_UP(timings->tWC_min, 2);
+
+ /* T16 - T19 + tCAD */
+ tWB = sunxi_nand_lookup_timing(tWB_lut, timings->tWB_max,
+ min_clk_period);
+ if (tWB < 0) {
+ dev_err(nfc->dev, "unsupported tWB\n");
+ return tWB;
+ }
+
+ tADL = DIV_ROUND_UP(timings->tADL_min, min_clk_period) >> 3;
+ if (tADL > 3) {
+ dev_err(nfc->dev, "unsupported tADL\n");
+ return -EINVAL;
+ }
+
+ tWHR = DIV_ROUND_UP(timings->tWHR_min, min_clk_period) >> 3;
+ if (tWHR > 3) {
+ dev_err(nfc->dev, "unsupported tWHR\n");
+ return -EINVAL;
+ }
+
+ tRHW = sunxi_nand_lookup_timing(tRHW_lut, timings->tRHW_min,
+ min_clk_period);
+ if (tRHW < 0) {
+ dev_err(nfc->dev, "unsupported tRHW\n");
+ return tRHW;
+ }
+
+ /*
+ * TODO: according to ONFI specs this value only applies for DDR NAND,
+ * but Allwinner seems to set this to 0x7. Mimic them for now.
+ */
+ tCAD = 0x7;
+
+ /* TODO: A83 has some more bits for CDQSS, CS, CLHZ, CCS, WC */
+ chip->timing_cfg = NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD);
+
+ /*
+ * ONFI specification 3.1, paragraph 4.15.2 dictates that EDO data
+ * output cycle timings shall be used if the host drives tRC less than
+ * 30 ns.
+ */
+ chip->timing_ctl = (timings->tRC_min < 30000) ? NFC_TIMING_CTL_EDO : 0;
+
+ /* Convert min_clk_period from picoseconds to nanoseconds */
+ min_clk_period = DIV_ROUND_UP(min_clk_period, 1000);
+
+ /*
+ * Convert min_clk_period into a clk frequency, then get the
+ * appropriate rate for the NAND controller IP given this formula
+ * (specified in the datasheet):
+ * nand clk_rate = min_clk_rate
+ */
+ chip->clk_rate = 1000000000L / min_clk_period;
+
+ return 0;
+}
+
+static int sunxi_nand_chip_init_timings(struct sunxi_nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(&chip->nand);
+ const struct nand_sdr_timings *timings;
+ int ret;
+ int mode;
+
+ mode = onfi_get_async_timing_mode(&chip->nand);
+ if (mode == ONFI_TIMING_MODE_UNKNOWN) {
+ mode = chip->nand.onfi_timing_mode_default;
+ } else {
+ uint8_t feature[ONFI_SUBFEATURE_PARAM_LEN] = {};
+ int i;
+
+ mode = fls(mode) - 1;
+ if (mode < 0)
+ mode = 0;
+
+ feature[0] = mode;
+ for (i = 0; i < chip->nsels; i++) {
+ chip->nand.select_chip(mtd, i);
+ ret = chip->nand.onfi_set_features(mtd,
+ &chip->nand,
+ ONFI_FEATURE_ADDR_TIMING_MODE,
+ feature);
+ chip->nand.select_chip(mtd, -1);
+ if (ret)
+ return ret;
+ }
+ }
+
+ timings = onfi_async_timing_mode_to_sdr_timings(mode);
+ if (IS_ERR(timings))
+ return PTR_ERR(timings);
+
+ return sunxi_nand_chip_set_timings(chip, timings);
+}
+
+static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd,
+ struct nand_ecc_ctrl *ecc)
+{
+ static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 };
+ struct sunxi_nand_hw_ecc *data;
+ struct nand_ecclayout *layout;
+ int nsectors;
+ int ret;
+ int i;
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ if (ecc->size != 512 && ecc->size != 1024)
+ return -EINVAL;
+
+ /* Prefer 1k ECC chunk over 512 ones */
+ if (ecc->size == 512 && mtd->writesize > 512) {
+ ecc->size = 1024;
+ ecc->strength *= 2;
+ }
+
+ /* Add ECC info retrieval from DT */
+ for (i = 0; i < ARRAY_SIZE(strengths); i++) {
+ if (ecc->strength <= strengths[i])
+ break;
+ }
+
+ if (i >= ARRAY_SIZE(strengths)) {
+ dev_err(nfc->dev, "unsupported strength\n");
+ ret = -ENOTSUPP;
+ goto err;
+ }
+
+ data->mode = i;
+
+ /* HW ECC always request ECC bytes for 1024 bytes blocks */
+ ecc->bytes = DIV_ROUND_UP(ecc->strength * fls(8 * 1024), 8);
+
+ /* HW ECC always work with even numbers of ECC bytes */
+ ecc->bytes = ALIGN(ecc->bytes, 2);
+
+ layout = &data->layout;
+ nsectors = mtd->writesize / ecc->size;
+
+ if (mtd->oobsize < ((ecc->bytes + 4) * nsectors)) {
+ ret = -EINVAL;
+ goto err;
+ }
+
+ layout->eccbytes = (ecc->bytes * nsectors);
+
+ ecc->layout = layout;
+ ecc->priv = data;
+
+ return 0;
+
+err:
+ kfree(data);
+
+ return ret;
+}
+
+#ifndef __UBOOT__
+static void sunxi_nand_hw_common_ecc_ctrl_cleanup(struct nand_ecc_ctrl *ecc)
+{
+ kfree(ecc->priv);
+}
+#endif /* __UBOOT__ */
+
+static int sunxi_nand_hw_ecc_ctrl_init(struct mtd_info *mtd,
+ struct nand_ecc_ctrl *ecc)
+{
+ struct nand_ecclayout *layout;
+ int nsectors;
+ int i, j;
+ int ret;
+
+ ret = sunxi_nand_hw_common_ecc_ctrl_init(mtd, ecc);
+ if (ret)
+ return ret;
+
+ ecc->read_page = sunxi_nfc_hw_ecc_read_page;
+ ecc->write_page = sunxi_nfc_hw_ecc_write_page;
+ ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage;
+ ecc->write_subpage = sunxi_nfc_hw_ecc_write_subpage;
+ layout = ecc->layout;
+ nsectors = mtd->writesize / ecc->size;
+
+ for (i = 0; i < nsectors; i++) {
+ if (i) {
+ layout->oobfree[i].offset =
+ layout->oobfree[i - 1].offset +
+ layout->oobfree[i - 1].length +
+ ecc->bytes;
+ layout->oobfree[i].length = 4;
+ } else {
+ /*
+ * The first 2 bytes are used for BB markers, hence we
+ * only have 2 bytes available in the first user data
+ * section.
+ */
+ layout->oobfree[i].length = 2;
+ layout->oobfree[i].offset = 2;
+ }
+
+ for (j = 0; j < ecc->bytes; j++)
+ layout->eccpos[(ecc->bytes * i) + j] =
+ layout->oobfree[i].offset +
+ layout->oobfree[i].length + j;
+ }
+
+ if (mtd->oobsize > (ecc->bytes + 4) * nsectors) {
+ layout->oobfree[nsectors].offset =
+ layout->oobfree[nsectors - 1].offset +
+ layout->oobfree[nsectors - 1].length +
+ ecc->bytes;
+ layout->oobfree[nsectors].length = mtd->oobsize -
+ ((ecc->bytes + 4) * nsectors);
+ }
+
+ return 0;
+}
+
+static int sunxi_nand_hw_syndrome_ecc_ctrl_init(struct mtd_info *mtd,
+ struct nand_ecc_ctrl *ecc)
+{
+ struct nand_ecclayout *layout;
+ int nsectors;
+ int i;
+ int ret;
+
+ ret = sunxi_nand_hw_common_ecc_ctrl_init(mtd, ecc);
+ if (ret)
+ return ret;
+
+ ecc->prepad = 4;
+ ecc->read_page = sunxi_nfc_hw_syndrome_ecc_read_page;
+ ecc->write_page = sunxi_nfc_hw_syndrome_ecc_write_page;
+
+ layout = ecc->layout;
+ nsectors = mtd->writesize / ecc->size;
+
+ for (i = 0; i < (ecc->bytes * nsectors); i++)
+ layout->eccpos[i] = i;
+
+ layout->oobfree[0].length = mtd->oobsize - i;
+ layout->oobfree[0].offset = i;
+
+ return 0;
+}
+
+#ifndef __UBOOT__
+static void sunxi_nand_ecc_cleanup(struct nand_ecc_ctrl *ecc)
+{
+ switch (ecc->mode) {
+ case NAND_ECC_HW:
+ case NAND_ECC_HW_SYNDROME:
+ sunxi_nand_hw_common_ecc_ctrl_cleanup(ecc);
+ break;
+ case NAND_ECC_NONE:
+ kfree(ecc->layout);
+ default:
+ break;
+ }
+}
+#endif /* __UBOOT__ */
+
+static int sunxi_nand_ecc_init(struct mtd_info *mtd, struct nand_ecc_ctrl *ecc)
+{
+ struct nand_chip *nand = mtd_to_nand(mtd);
+ int ret;
+
+ if (!ecc->size) {
+ ecc->size = nand->ecc_step_ds;
+ ecc->strength = nand->ecc_strength_ds;
+ }
+
+ if (!ecc->size || !ecc->strength)
+ return -EINVAL;
+
+ switch (ecc->mode) {
+ case NAND_ECC_SOFT_BCH:
+ break;
+ case NAND_ECC_HW:
+ ret = sunxi_nand_hw_ecc_ctrl_init(mtd, ecc);
+ if (ret)
+ return ret;
+ break;
+ case NAND_ECC_HW_SYNDROME:
+ ret = sunxi_nand_hw_syndrome_ecc_ctrl_init(mtd, ecc);
+ if (ret)
+ return ret;
+ break;
+ case NAND_ECC_NONE:
+ ecc->layout = kzalloc(sizeof(*ecc->layout), GFP_KERNEL);
+ if (!ecc->layout)
+ return -ENOMEM;
+ ecc->layout->oobfree[0].length = mtd->oobsize;
+ case NAND_ECC_SOFT:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int sunxi_nand_chip_init(int node, struct sunxi_nfc *nfc, int devnum)
+{
+ const struct nand_sdr_timings *timings;
+ const void *blob = gd->fdt_blob;
+ struct sunxi_nand_chip *chip;
+ struct mtd_info *mtd;
+ struct nand_chip *nand;
+ int nsels;
+ int ret;
+ int i;
+ u32 cs[8], rb[8];
+
+ if (!fdt_getprop(blob, node, "reg", &nsels))
+ return -EINVAL;
+
+ nsels /= sizeof(u32);
+ if (!nsels || nsels > 8) {
+ dev_err(dev, "invalid reg property size\n");
+ return -EINVAL;
+ }
+
+ chip = kzalloc(sizeof(*chip) +
+ (nsels * sizeof(struct sunxi_nand_chip_sel)),
+ GFP_KERNEL);
+ if (!chip) {
+ dev_err(dev, "could not allocate chip\n");
+ return -ENOMEM;
+ }
+
+ chip->nsels = nsels;
+ chip->selected = -1;
+
+ for (i = 0; i < nsels; i++) {
+ cs[i] = -1;
+ rb[i] = -1;
+ }
+
+ ret = fdtdec_get_int_array(gd->fdt_blob, node, "reg", cs, nsels);
+ if (ret) {
+ dev_err(dev, "could not retrieve reg property: %d\n", ret);
+ return ret;
+ }
+
+ ret = fdtdec_get_int_array(gd->fdt_blob, node, "allwinner,rb", rb,
+ nsels);
+ if (ret) {
+ dev_err(dev, "could not retrieve reg property: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < nsels; i++) {
+ int tmp = cs[i];
+
+ if (tmp > NFC_MAX_CS) {
+ dev_err(dev,
+ "invalid reg value: %u (max CS = 7)\n",
+ tmp);
+ return -EINVAL;
+ }
+
+ if (test_and_set_bit(tmp, &nfc->assigned_cs)) {
+ dev_err(dev, "CS %d already assigned\n", tmp);
+ return -EINVAL;
+ }
+
+ chip->sels[i].cs = tmp;
+
+ tmp = rb[i];
+ if (tmp >= 0 && tmp < 2) {
+ chip->sels[i].rb.type = RB_NATIVE;
+ chip->sels[i].rb.info.nativeid = tmp;
+ } else {
+ ret = gpio_request_by_name_nodev(blob, node,
+ "rb-gpios", i,
+ &chip->sels[i].rb.info.gpio,
+ GPIOD_IS_IN);
+ if (ret)
+ chip->sels[i].rb.type = RB_GPIO;
+ else
+ chip->sels[i].rb.type = RB_NONE;
+ }
+ }
+
+ timings = onfi_async_timing_mode_to_sdr_timings(0);
+ if (IS_ERR(timings)) {
+ ret = PTR_ERR(timings);
+ dev_err(dev,
+ "could not retrieve timings for ONFI mode 0: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = sunxi_nand_chip_set_timings(chip, timings);
+ if (ret) {
+ dev_err(dev, "could not configure chip timings: %d\n", ret);
+ return ret;
+ }
+
+ nand = &chip->nand;
+ /* Default tR value specified in the ONFI spec (chapter 4.15.1) */
+ nand->chip_delay = 200;
+ nand->controller = &nfc->controller;
+ /*
+ * Set the ECC mode to the default value in case nothing is specified
+ * in the DT.
+ */
+ nand->ecc.mode = NAND_ECC_HW;
+ nand->flash_node = node;
+ nand->select_chip = sunxi_nfc_select_chip;
+ nand->cmd_ctrl = sunxi_nfc_cmd_ctrl;
+ nand->read_buf = sunxi_nfc_read_buf;
+ nand->write_buf = sunxi_nfc_write_buf;
+ nand->read_byte = sunxi_nfc_read_byte;
+
+ mtd = nand_to_mtd(nand);
+ ret = nand_scan_ident(mtd, nsels, NULL);
+ if (ret)
+ return ret;
+
+ if (nand->bbt_options & NAND_BBT_USE_FLASH)
+ nand->bbt_options |= NAND_BBT_NO_OOB;
+
+ if (nand->options & NAND_NEED_SCRAMBLING)
+ nand->options |= NAND_NO_SUBPAGE_WRITE;
+
+ nand->options |= NAND_SUBPAGE_READ;
+
+ ret = sunxi_nand_chip_init_timings(chip);
+ if (ret) {
+ dev_err(dev, "could not configure chip timings: %d\n", ret);
+ return ret;
+ }
+
+ ret = sunxi_nand_ecc_init(mtd, &nand->ecc);
+ if (ret) {
+ dev_err(dev, "ECC init failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = nand_scan_tail(mtd);
+ if (ret) {
+ dev_err(dev, "nand_scan_tail failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = nand_register(devnum, mtd);
+ if (ret) {
+ dev_err(dev, "failed to register mtd device: %d\n", ret);
+ return ret;
+ }
+
+ list_add_tail(&chip->node, &nfc->chips);
+
+ return 0;
+}
+
+static int sunxi_nand_chips_init(int node, struct sunxi_nfc *nfc)
+{
+ const void *blob = gd->fdt_blob;
+ int nand_node;
+ int ret, i = 0;
+
+ for (nand_node = fdt_first_subnode(blob, node); nand_node >= 0;
+ nand_node = fdt_next_subnode(blob, nand_node))
+ i++;
+
+ if (i > 8) {
+ dev_err(dev, "too many NAND chips: %d (max = 8)\n", i);
+ return -EINVAL;
+ }
+
+ i = 0;
+ for (nand_node = fdt_first_subnode(blob, node); nand_node >= 0;
+ nand_node = fdt_next_subnode(blob, nand_node)) {
+ ret = sunxi_nand_chip_init(nand_node, nfc, i++);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+#ifndef __UBOOT__
+static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc)
+{
+ struct sunxi_nand_chip *chip;
+
+ while (!list_empty(&nfc->chips)) {
+ chip = list_first_entry(&nfc->chips, struct sunxi_nand_chip,
+ node);
+ nand_release(&chip->mtd);
+ sunxi_nand_ecc_cleanup(&chip->nand.ecc);
+ list_del(&chip->node);
+ kfree(chip);
+ }
+}
+#endif /* __UBOOT__ */
+
+void sunxi_nand_init(void)
+{
+ const void *blob = gd->fdt_blob;
+ struct sunxi_nfc *nfc;
+ fdt_addr_t regs;
+ int node;
+ int ret;
+
+ nfc = kzalloc(sizeof(*nfc), GFP_KERNEL);
+ if (!nfc)
+ return;
+
+ spin_lock_init(&nfc->controller.lock);
+ init_waitqueue_head(&nfc->controller.wq);
+ INIT_LIST_HEAD(&nfc->chips);
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_SUNXI_NAND);
+ if (node < 0) {
+ pr_err("unable to find nfc node in device tree\n");
+ goto err;
+ }
+
+ if (!fdtdec_get_is_enabled(blob, node)) {
+ pr_err("nfc disabled in device tree\n");
+ goto err;
+ }
+
+ regs = fdtdec_get_addr(blob, node, "reg");
+ if (regs == FDT_ADDR_T_NONE) {
+ pr_err("unable to find nfc address in device tree\n");
+ goto err;
+ }
+
+ nfc->regs = (void *)regs;
+
+ ret = sunxi_nfc_rst(nfc);
+ if (ret)
+ goto err;
+
+ ret = sunxi_nand_chips_init(node, nfc);
+ if (ret) {
+ dev_err(dev, "failed to init nand chips\n");
+ goto err;
+ }
+
+ return;
+
+err:
+ kfree(nfc);
+}
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Boris BREZILLON");
+MODULE_DESCRIPTION("Allwinner NAND Flash Controller driver");
projects / u-boot / commitdiff