2311 строки
59 KiB
C
2311 строки
59 KiB
C
/*
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* Copyright (C) 2013 Boris BREZILLON <b.brezillon.dev@gmail.com>
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*
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* Derived from:
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* https://github.com/yuq/sunxi-nfc-mtd
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* Copyright (C) 2013 Qiang Yu <yuq825@gmail.com>
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*
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* https://github.com/hno/Allwinner-Info
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* Copyright (C) 2013 Henrik Nordström <Henrik Nordström>
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*
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* Copyright (C) 2013 Dmitriy B. <rzk333@gmail.com>
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* Copyright (C) 2013 Sergey Lapin <slapin@ossfans.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/rawnand.h>
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#include <linux/mtd/partitions.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/dmaengine.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/iopoll.h>
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#include <linux/reset.h>
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#define NFC_REG_CTL 0x0000
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#define NFC_REG_ST 0x0004
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#define NFC_REG_INT 0x0008
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#define NFC_REG_TIMING_CTL 0x000C
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#define NFC_REG_TIMING_CFG 0x0010
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#define NFC_REG_ADDR_LOW 0x0014
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#define NFC_REG_ADDR_HIGH 0x0018
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#define NFC_REG_SECTOR_NUM 0x001C
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#define NFC_REG_CNT 0x0020
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#define NFC_REG_CMD 0x0024
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#define NFC_REG_RCMD_SET 0x0028
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#define NFC_REG_WCMD_SET 0x002C
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#define NFC_REG_IO_DATA 0x0030
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#define NFC_REG_ECC_CTL 0x0034
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#define NFC_REG_ECC_ST 0x0038
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#define NFC_REG_DEBUG 0x003C
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#define NFC_REG_ECC_ERR_CNT(x) ((0x0040 + (x)) & ~0x3)
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#define NFC_REG_USER_DATA(x) (0x0050 + ((x) * 4))
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#define NFC_REG_SPARE_AREA 0x00A0
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#define NFC_REG_PAT_ID 0x00A4
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#define NFC_RAM0_BASE 0x0400
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#define NFC_RAM1_BASE 0x0800
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/* define bit use in NFC_CTL */
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#define NFC_EN BIT(0)
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#define NFC_RESET BIT(1)
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#define NFC_BUS_WIDTH_MSK BIT(2)
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#define NFC_BUS_WIDTH_8 (0 << 2)
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#define NFC_BUS_WIDTH_16 (1 << 2)
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#define NFC_RB_SEL_MSK BIT(3)
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#define NFC_RB_SEL(x) ((x) << 3)
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#define NFC_CE_SEL_MSK GENMASK(26, 24)
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#define NFC_CE_SEL(x) ((x) << 24)
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#define NFC_CE_CTL BIT(6)
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#define NFC_PAGE_SHIFT_MSK GENMASK(11, 8)
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#define NFC_PAGE_SHIFT(x) (((x) < 10 ? 0 : (x) - 10) << 8)
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#define NFC_SAM BIT(12)
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#define NFC_RAM_METHOD BIT(14)
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#define NFC_DEBUG_CTL BIT(31)
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/* define bit use in NFC_ST */
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#define NFC_RB_B2R BIT(0)
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#define NFC_CMD_INT_FLAG BIT(1)
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#define NFC_DMA_INT_FLAG BIT(2)
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#define NFC_CMD_FIFO_STATUS BIT(3)
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#define NFC_STA BIT(4)
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#define NFC_NATCH_INT_FLAG BIT(5)
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#define NFC_RB_STATE(x) BIT(x + 8)
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/* define bit use in NFC_INT */
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#define NFC_B2R_INT_ENABLE BIT(0)
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#define NFC_CMD_INT_ENABLE BIT(1)
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#define NFC_DMA_INT_ENABLE BIT(2)
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#define NFC_INT_MASK (NFC_B2R_INT_ENABLE | \
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NFC_CMD_INT_ENABLE | \
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NFC_DMA_INT_ENABLE)
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/* define bit use in NFC_TIMING_CTL */
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#define NFC_TIMING_CTL_EDO BIT(8)
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/* define NFC_TIMING_CFG register layout */
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#define NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD) \
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(((tWB) & 0x3) | (((tADL) & 0x3) << 2) | \
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(((tWHR) & 0x3) << 4) | (((tRHW) & 0x3) << 6) | \
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(((tCAD) & 0x7) << 8))
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/* define bit use in NFC_CMD */
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#define NFC_CMD_LOW_BYTE_MSK GENMASK(7, 0)
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#define NFC_CMD_HIGH_BYTE_MSK GENMASK(15, 8)
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#define NFC_CMD(x) (x)
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#define NFC_ADR_NUM_MSK GENMASK(18, 16)
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#define NFC_ADR_NUM(x) (((x) - 1) << 16)
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#define NFC_SEND_ADR BIT(19)
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#define NFC_ACCESS_DIR BIT(20)
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#define NFC_DATA_TRANS BIT(21)
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#define NFC_SEND_CMD1 BIT(22)
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#define NFC_WAIT_FLAG BIT(23)
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#define NFC_SEND_CMD2 BIT(24)
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#define NFC_SEQ BIT(25)
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#define NFC_DATA_SWAP_METHOD BIT(26)
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#define NFC_ROW_AUTO_INC BIT(27)
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#define NFC_SEND_CMD3 BIT(28)
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#define NFC_SEND_CMD4 BIT(29)
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#define NFC_CMD_TYPE_MSK GENMASK(31, 30)
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#define NFC_NORMAL_OP (0 << 30)
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#define NFC_ECC_OP (1 << 30)
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#define NFC_PAGE_OP (2 << 30)
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/* define bit use in NFC_RCMD_SET */
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#define NFC_READ_CMD_MSK GENMASK(7, 0)
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#define NFC_RND_READ_CMD0_MSK GENMASK(15, 8)
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#define NFC_RND_READ_CMD1_MSK GENMASK(23, 16)
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/* define bit use in NFC_WCMD_SET */
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#define NFC_PROGRAM_CMD_MSK GENMASK(7, 0)
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#define NFC_RND_WRITE_CMD_MSK GENMASK(15, 8)
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#define NFC_READ_CMD0_MSK GENMASK(23, 16)
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#define NFC_READ_CMD1_MSK GENMASK(31, 24)
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/* define bit use in NFC_ECC_CTL */
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#define NFC_ECC_EN BIT(0)
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#define NFC_ECC_PIPELINE BIT(3)
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#define NFC_ECC_EXCEPTION BIT(4)
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#define NFC_ECC_BLOCK_SIZE_MSK BIT(5)
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#define NFC_ECC_BLOCK_512 BIT(5)
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#define NFC_RANDOM_EN BIT(9)
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#define NFC_RANDOM_DIRECTION BIT(10)
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#define NFC_ECC_MODE_MSK GENMASK(15, 12)
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#define NFC_ECC_MODE(x) ((x) << 12)
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#define NFC_RANDOM_SEED_MSK GENMASK(30, 16)
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#define NFC_RANDOM_SEED(x) ((x) << 16)
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/* define bit use in NFC_ECC_ST */
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#define NFC_ECC_ERR(x) BIT(x)
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#define NFC_ECC_ERR_MSK GENMASK(15, 0)
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#define NFC_ECC_PAT_FOUND(x) BIT(x + 16)
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#define NFC_ECC_ERR_CNT(b, x) (((x) >> (((b) % 4) * 8)) & 0xff)
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#define NFC_DEFAULT_TIMEOUT_MS 1000
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#define NFC_SRAM_SIZE 1024
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#define NFC_MAX_CS 7
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/*
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* Ready/Busy detection type: describes the Ready/Busy detection modes
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*
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* @RB_NONE: no external detection available, rely on STATUS command
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* and software timeouts
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* @RB_NATIVE: use sunxi NAND controller Ready/Busy support. The Ready/Busy
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* pin of the NAND flash chip must be connected to one of the
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* native NAND R/B pins (those which can be muxed to the NAND
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* Controller)
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* @RB_GPIO: use a simple GPIO to handle Ready/Busy status. The Ready/Busy
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* pin of the NAND flash chip must be connected to a GPIO capable
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* pin.
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*/
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enum sunxi_nand_rb_type {
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RB_NONE,
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RB_NATIVE,
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RB_GPIO,
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};
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/*
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* Ready/Busy structure: stores information related to Ready/Busy detection
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*
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* @type: the Ready/Busy detection mode
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* @info: information related to the R/B detection mode. Either a gpio
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* id or a native R/B id (those supported by the NAND controller).
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*/
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struct sunxi_nand_rb {
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enum sunxi_nand_rb_type type;
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union {
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int gpio;
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int nativeid;
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} info;
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};
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/*
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* Chip Select structure: stores information related to NAND Chip Select
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*
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* @cs: the NAND CS id used to communicate with a NAND Chip
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* @rb: the Ready/Busy description
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*/
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struct sunxi_nand_chip_sel {
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u8 cs;
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struct sunxi_nand_rb rb;
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};
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/*
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* sunxi HW ECC infos: stores information related to HW ECC support
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*
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* @mode: the sunxi ECC mode field deduced from ECC requirements
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*/
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struct sunxi_nand_hw_ecc {
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int mode;
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};
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/*
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* NAND chip structure: stores NAND chip device related information
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*
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* @node: used to store NAND chips into a list
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* @nand: base NAND chip structure
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* @mtd: base MTD structure
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* @clk_rate: clk_rate required for this NAND chip
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* @timing_cfg TIMING_CFG register value for this NAND chip
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* @selected: current active CS
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* @nsels: number of CS lines required by the NAND chip
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* @sels: array of CS lines descriptions
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*/
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struct sunxi_nand_chip {
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struct list_head node;
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struct nand_chip nand;
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unsigned long clk_rate;
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u32 timing_cfg;
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u32 timing_ctl;
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int selected;
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int addr_cycles;
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u32 addr[2];
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int cmd_cycles;
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u8 cmd[2];
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int nsels;
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struct sunxi_nand_chip_sel sels[0];
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};
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static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand)
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{
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return container_of(nand, struct sunxi_nand_chip, nand);
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}
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/*
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* NAND Controller structure: stores sunxi NAND controller information
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*
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* @controller: base controller structure
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* @dev: parent device (used to print error messages)
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* @regs: NAND controller registers
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* @ahb_clk: NAND Controller AHB clock
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* @mod_clk: NAND Controller mod clock
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* @assigned_cs: bitmask describing already assigned CS lines
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* @clk_rate: NAND controller current clock rate
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* @chips: a list containing all the NAND chips attached to
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* this NAND controller
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* @complete: a completion object used to wait for NAND
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* controller events
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*/
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struct sunxi_nfc {
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struct nand_hw_control controller;
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struct device *dev;
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void __iomem *regs;
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struct clk *ahb_clk;
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struct clk *mod_clk;
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struct reset_control *reset;
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unsigned long assigned_cs;
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unsigned long clk_rate;
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struct list_head chips;
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struct completion complete;
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struct dma_chan *dmac;
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};
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static inline struct sunxi_nfc *to_sunxi_nfc(struct nand_hw_control *ctrl)
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{
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return container_of(ctrl, struct sunxi_nfc, controller);
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}
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static irqreturn_t sunxi_nfc_interrupt(int irq, void *dev_id)
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{
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struct sunxi_nfc *nfc = dev_id;
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u32 st = readl(nfc->regs + NFC_REG_ST);
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u32 ien = readl(nfc->regs + NFC_REG_INT);
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if (!(ien & st))
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return IRQ_NONE;
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if ((ien & st) == ien)
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complete(&nfc->complete);
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writel(st & NFC_INT_MASK, nfc->regs + NFC_REG_ST);
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writel(~st & ien & NFC_INT_MASK, nfc->regs + NFC_REG_INT);
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return IRQ_HANDLED;
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}
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static int sunxi_nfc_wait_events(struct sunxi_nfc *nfc, u32 events,
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bool use_polling, unsigned int timeout_ms)
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{
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int ret;
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if (events & ~NFC_INT_MASK)
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return -EINVAL;
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if (!timeout_ms)
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timeout_ms = NFC_DEFAULT_TIMEOUT_MS;
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if (!use_polling) {
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init_completion(&nfc->complete);
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writel(events, nfc->regs + NFC_REG_INT);
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ret = wait_for_completion_timeout(&nfc->complete,
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msecs_to_jiffies(timeout_ms));
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if (!ret)
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ret = -ETIMEDOUT;
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else
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ret = 0;
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writel(0, nfc->regs + NFC_REG_INT);
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} else {
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u32 status;
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ret = readl_poll_timeout(nfc->regs + NFC_REG_ST, status,
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(status & events) == events, 1,
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timeout_ms * 1000);
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}
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writel(events & NFC_INT_MASK, nfc->regs + NFC_REG_ST);
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if (ret)
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dev_err(nfc->dev, "wait interrupt timedout\n");
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return ret;
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}
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static int sunxi_nfc_wait_cmd_fifo_empty(struct sunxi_nfc *nfc)
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{
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u32 status;
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int ret;
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ret = readl_poll_timeout(nfc->regs + NFC_REG_ST, status,
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!(status & NFC_CMD_FIFO_STATUS), 1,
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NFC_DEFAULT_TIMEOUT_MS * 1000);
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if (ret)
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dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n");
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return ret;
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}
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static int sunxi_nfc_rst(struct sunxi_nfc *nfc)
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{
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u32 ctl;
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int ret;
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writel(0, nfc->regs + NFC_REG_ECC_CTL);
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writel(NFC_RESET, nfc->regs + NFC_REG_CTL);
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ret = readl_poll_timeout(nfc->regs + NFC_REG_CTL, ctl,
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!(ctl & NFC_RESET), 1,
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NFC_DEFAULT_TIMEOUT_MS * 1000);
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if (ret)
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dev_err(nfc->dev, "wait for NAND controller reset timedout\n");
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return ret;
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}
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static int sunxi_nfc_dma_op_prepare(struct mtd_info *mtd, const void *buf,
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int chunksize, int nchunks,
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enum dma_data_direction ddir,
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struct scatterlist *sg)
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{
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struct nand_chip *nand = mtd_to_nand(mtd);
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struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
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struct dma_async_tx_descriptor *dmad;
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enum dma_transfer_direction tdir;
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dma_cookie_t dmat;
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int ret;
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if (ddir == DMA_FROM_DEVICE)
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tdir = DMA_DEV_TO_MEM;
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else
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tdir = DMA_MEM_TO_DEV;
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sg_init_one(sg, buf, nchunks * chunksize);
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ret = dma_map_sg(nfc->dev, sg, 1, ddir);
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if (!ret)
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return -ENOMEM;
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dmad = dmaengine_prep_slave_sg(nfc->dmac, sg, 1, tdir, DMA_CTRL_ACK);
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if (!dmad) {
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ret = -EINVAL;
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goto err_unmap_buf;
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}
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writel(readl(nfc->regs + NFC_REG_CTL) | NFC_RAM_METHOD,
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nfc->regs + NFC_REG_CTL);
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writel(nchunks, nfc->regs + NFC_REG_SECTOR_NUM);
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writel(chunksize, nfc->regs + NFC_REG_CNT);
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dmat = dmaengine_submit(dmad);
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ret = dma_submit_error(dmat);
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if (ret)
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goto err_clr_dma_flag;
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return 0;
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err_clr_dma_flag:
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writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_RAM_METHOD,
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nfc->regs + NFC_REG_CTL);
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err_unmap_buf:
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dma_unmap_sg(nfc->dev, sg, 1, ddir);
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return ret;
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}
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static void sunxi_nfc_dma_op_cleanup(struct mtd_info *mtd,
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enum dma_data_direction ddir,
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struct scatterlist *sg)
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{
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struct nand_chip *nand = mtd_to_nand(mtd);
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struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
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dma_unmap_sg(nfc->dev, sg, 1, ddir);
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writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_RAM_METHOD,
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nfc->regs + NFC_REG_CTL);
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}
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static int sunxi_nfc_dev_ready(struct mtd_info *mtd)
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{
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struct nand_chip *nand = mtd_to_nand(mtd);
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struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
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struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
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struct sunxi_nand_rb *rb;
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int ret;
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if (sunxi_nand->selected < 0)
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return 0;
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rb = &sunxi_nand->sels[sunxi_nand->selected].rb;
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switch (rb->type) {
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case RB_NATIVE:
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ret = !!(readl(nfc->regs + NFC_REG_ST) &
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NFC_RB_STATE(rb->info.nativeid));
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break;
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case RB_GPIO:
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ret = gpio_get_value(rb->info.gpio);
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break;
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case RB_NONE:
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default:
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ret = 0;
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dev_err(nfc->dev, "cannot check R/B NAND status!\n");
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break;
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}
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return ret;
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}
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static void sunxi_nfc_select_chip(struct mtd_info *mtd, int chip)
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{
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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);
|
|
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) {
|
|
clk_set_rate(nfc->mod_clk, 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) {
|
|
bool poll = false;
|
|
|
|
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);
|
|
|
|
/* Arbitrary limit for polling mode */
|
|
if (cnt < 64)
|
|
poll = true;
|
|
|
|
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, poll, 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) {
|
|
bool poll = false;
|
|
|
|
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);
|
|
|
|
/* Arbitrary limit for polling mode */
|
|
if (cnt < 64)
|
|
poll = true;
|
|
|
|
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, poll, 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;
|
|
|
|
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);
|
|
|
|
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
|
|
if (ret)
|
|
return;
|
|
|
|
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_events(nfc, NFC_CMD_INT_FLAG, true, 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_div_by_ws(mtd->erasesize, mtd);
|
|
|
|
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 |
|
|
NFC_ECC_PIPELINE;
|
|
|
|
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 inline u32 sunxi_nfc_buf_to_user_data(const u8 *buf)
|
|
{
|
|
return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
|
|
}
|
|
|
|
static void sunxi_nfc_hw_ecc_get_prot_oob_bytes(struct mtd_info *mtd, u8 *oob,
|
|
int step, bool bbm, int page)
|
|
{
|
|
struct nand_chip *nand = mtd_to_nand(mtd);
|
|
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
|
|
|
|
sunxi_nfc_user_data_to_buf(readl(nfc->regs + NFC_REG_USER_DATA(step)),
|
|
oob);
|
|
|
|
/* De-randomize the Bad Block Marker. */
|
|
if (bbm && (nand->options & NAND_NEED_SCRAMBLING))
|
|
sunxi_nfc_randomize_bbm(mtd, page, oob);
|
|
}
|
|
|
|
static void sunxi_nfc_hw_ecc_set_prot_oob_bytes(struct mtd_info *mtd,
|
|
const u8 *oob, int step,
|
|
bool bbm, int page)
|
|
{
|
|
struct nand_chip *nand = mtd_to_nand(mtd);
|
|
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
|
|
u8 user_data[4];
|
|
|
|
/* Randomize the Bad Block Marker. */
|
|
if (bbm && (nand->options & NAND_NEED_SCRAMBLING)) {
|
|
memcpy(user_data, oob, sizeof(user_data));
|
|
sunxi_nfc_randomize_bbm(mtd, page, user_data);
|
|
oob = user_data;
|
|
}
|
|
|
|
writel(sunxi_nfc_buf_to_user_data(oob),
|
|
nfc->regs + NFC_REG_USER_DATA(step));
|
|
}
|
|
|
|
static void sunxi_nfc_hw_ecc_update_stats(struct mtd_info *mtd,
|
|
unsigned int *max_bitflips, int ret)
|
|
{
|
|
if (ret < 0) {
|
|
mtd->ecc_stats.failed++;
|
|
} else {
|
|
mtd->ecc_stats.corrected += ret;
|
|
*max_bitflips = max_t(unsigned int, *max_bitflips, ret);
|
|
}
|
|
}
|
|
|
|
static int sunxi_nfc_hw_ecc_correct(struct mtd_info *mtd, u8 *data, u8 *oob,
|
|
int step, u32 status, bool *erased)
|
|
{
|
|
struct nand_chip *nand = mtd_to_nand(mtd);
|
|
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
|
|
struct nand_ecc_ctrl *ecc = &nand->ecc;
|
|
u32 tmp;
|
|
|
|
*erased = false;
|
|
|
|
if (status & NFC_ECC_ERR(step))
|
|
return -EBADMSG;
|
|
|
|
if (status & NFC_ECC_PAT_FOUND(step)) {
|
|
u8 pattern;
|
|
|
|
if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID) & 0x1))) {
|
|
pattern = 0x0;
|
|
} else {
|
|
pattern = 0xff;
|
|
*erased = true;
|
|
}
|
|
|
|
if (data)
|
|
memset(data, pattern, ecc->size);
|
|
|
|
if (oob)
|
|
memset(oob, pattern, ecc->bytes + 4);
|
|
|
|
return 0;
|
|
}
|
|
|
|
tmp = readl(nfc->regs + NFC_REG_ECC_ERR_CNT(step));
|
|
|
|
return NFC_ECC_ERR_CNT(step, tmp);
|
|
}
|
|
|
|
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, bool oob_required, 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;
|
|
bool erased;
|
|
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_events(nfc, NFC_CMD_INT_FLAG, false, 0);
|
|
sunxi_nfc_randomizer_disable(mtd);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*cur_off = oob_off + ecc->bytes + 4;
|
|
|
|
ret = sunxi_nfc_hw_ecc_correct(mtd, data, oob_required ? oob : NULL, 0,
|
|
readl(nfc->regs + NFC_REG_ECC_ST),
|
|
&erased);
|
|
if (erased)
|
|
return 1;
|
|
|
|
if (ret < 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);
|
|
} else {
|
|
memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE,
|
|
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 {
|
|
memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, ecc->size);
|
|
|
|
if (oob_required) {
|
|
nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1);
|
|
sunxi_nfc_randomizer_read_buf(mtd, oob, ecc->bytes + 4,
|
|
true, page);
|
|
|
|
sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, 0,
|
|
bbm, page);
|
|
}
|
|
}
|
|
|
|
sunxi_nfc_hw_ecc_update_stats(mtd, 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 || *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);
|
|
|
|
if (cur_off)
|
|
*cur_off = mtd->oobsize + mtd->writesize;
|
|
}
|
|
|
|
static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
|
|
int oob_required, int page,
|
|
int nchunks)
|
|
{
|
|
struct nand_chip *nand = mtd_to_nand(mtd);
|
|
bool randomized = nand->options & NAND_NEED_SCRAMBLING;
|
|
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
|
|
struct nand_ecc_ctrl *ecc = &nand->ecc;
|
|
unsigned int max_bitflips = 0;
|
|
int ret, i, raw_mode = 0;
|
|
struct scatterlist sg;
|
|
u32 status;
|
|
|
|
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = sunxi_nfc_dma_op_prepare(mtd, buf, ecc->size, nchunks,
|
|
DMA_FROM_DEVICE, &sg);
|
|
if (ret)
|
|
return ret;
|
|
|
|
sunxi_nfc_hw_ecc_enable(mtd);
|
|
sunxi_nfc_randomizer_config(mtd, page, false);
|
|
sunxi_nfc_randomizer_enable(mtd);
|
|
|
|
writel((NAND_CMD_RNDOUTSTART << 16) | (NAND_CMD_RNDOUT << 8) |
|
|
NAND_CMD_READSTART, nfc->regs + NFC_REG_RCMD_SET);
|
|
|
|
dma_async_issue_pending(nfc->dmac);
|
|
|
|
writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD | NFC_DATA_TRANS,
|
|
nfc->regs + NFC_REG_CMD);
|
|
|
|
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
|
|
if (ret)
|
|
dmaengine_terminate_all(nfc->dmac);
|
|
|
|
sunxi_nfc_randomizer_disable(mtd);
|
|
sunxi_nfc_hw_ecc_disable(mtd);
|
|
|
|
sunxi_nfc_dma_op_cleanup(mtd, DMA_FROM_DEVICE, &sg);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
status = readl(nfc->regs + NFC_REG_ECC_ST);
|
|
|
|
for (i = 0; i < nchunks; i++) {
|
|
int data_off = i * ecc->size;
|
|
int oob_off = i * (ecc->bytes + 4);
|
|
u8 *data = buf + data_off;
|
|
u8 *oob = nand->oob_poi + oob_off;
|
|
bool erased;
|
|
|
|
ret = sunxi_nfc_hw_ecc_correct(mtd, randomized ? data : NULL,
|
|
oob_required ? oob : NULL,
|
|
i, status, &erased);
|
|
|
|
/* ECC errors are handled in the second loop. */
|
|
if (ret < 0)
|
|
continue;
|
|
|
|
if (oob_required && !erased) {
|
|
/* TODO: use DMA to retrieve OOB */
|
|
nand->cmdfunc(mtd, NAND_CMD_RNDOUT,
|
|
mtd->writesize + oob_off, -1);
|
|
nand->read_buf(mtd, oob, ecc->bytes + 4);
|
|
|
|
sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, i,
|
|
!i, page);
|
|
}
|
|
|
|
if (erased)
|
|
raw_mode = 1;
|
|
|
|
sunxi_nfc_hw_ecc_update_stats(mtd, &max_bitflips, ret);
|
|
}
|
|
|
|
if (status & NFC_ECC_ERR_MSK) {
|
|
for (i = 0; i < nchunks; i++) {
|
|
int data_off = i * ecc->size;
|
|
int oob_off = i * (ecc->bytes + 4);
|
|
u8 *data = buf + data_off;
|
|
u8 *oob = nand->oob_poi + oob_off;
|
|
|
|
if (!(status & NFC_ECC_ERR(i)))
|
|
continue;
|
|
|
|
/*
|
|
* Re-read the data with the randomizer disabled to
|
|
* identify bitflips in erased pages.
|
|
*/
|
|
if (randomized) {
|
|
/* TODO: use DMA to read page in raw mode */
|
|
nand->cmdfunc(mtd, NAND_CMD_RNDOUT,
|
|
data_off, -1);
|
|
nand->read_buf(mtd, data, ecc->size);
|
|
}
|
|
|
|
/* TODO: use DMA to retrieve OOB */
|
|
nand->cmdfunc(mtd, NAND_CMD_RNDOUT,
|
|
mtd->writesize + 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;
|
|
|
|
sunxi_nfc_hw_ecc_update_stats(mtd, &max_bitflips, ret);
|
|
}
|
|
}
|
|
|
|
if (oob_required)
|
|
sunxi_nfc_hw_ecc_read_extra_oob(mtd, nand->oob_poi,
|
|
NULL, !raw_mode,
|
|
page);
|
|
|
|
return max_bitflips;
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, 0, bbm, page);
|
|
|
|
writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD |
|
|
NFC_ACCESS_DIR | NFC_ECC_OP,
|
|
nfc->regs + NFC_REG_CMD);
|
|
|
|
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 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 || *cur_off != offset)
|
|
nand->cmdfunc(mtd, NAND_CMD_RNDIN,
|
|
offset + mtd->writesize, -1);
|
|
|
|
sunxi_nfc_randomizer_write_buf(mtd, oob + offset, len, false, page);
|
|
|
|
if (cur_off)
|
|
*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, oob_required, 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_page_dma(struct mtd_info *mtd,
|
|
struct nand_chip *chip, u8 *buf,
|
|
int oob_required, int page)
|
|
{
|
|
int ret;
|
|
|
|
ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, oob_required, page,
|
|
chip->ecc.steps);
|
|
if (ret >= 0)
|
|
return ret;
|
|
|
|
/* Fallback to PIO mode */
|
|
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1);
|
|
|
|
return sunxi_nfc_hw_ecc_read_page(mtd, chip, buf, oob_required, page);
|
|
}
|
|
|
|
static int sunxi_nfc_hw_ecc_read_subpage(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
u32 data_offs, u32 readlen,
|
|
u8 *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);
|
|
|
|
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,
|
|
false, page);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
sunxi_nfc_hw_ecc_disable(mtd);
|
|
|
|
return max_bitflips;
|
|
}
|
|
|
|
static int sunxi_nfc_hw_ecc_read_subpage_dma(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
u32 data_offs, u32 readlen,
|
|
u8 *buf, int page)
|
|
{
|
|
int nchunks = DIV_ROUND_UP(data_offs + readlen, chip->ecc.size);
|
|
int ret;
|
|
|
|
ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, false, page, nchunks);
|
|
if (ret >= 0)
|
|
return ret;
|
|
|
|
/* Fallback to PIO mode */
|
|
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1);
|
|
|
|
return sunxi_nfc_hw_ecc_read_subpage(mtd, chip, data_offs, readlen,
|
|
buf, page);
|
|
}
|
|
|
|
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_ecc_write_page_dma(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
const u8 *buf,
|
|
int oob_required,
|
|
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;
|
|
struct scatterlist sg;
|
|
int ret, i;
|
|
|
|
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = sunxi_nfc_dma_op_prepare(mtd, buf, ecc->size, ecc->steps,
|
|
DMA_TO_DEVICE, &sg);
|
|
if (ret)
|
|
goto pio_fallback;
|
|
|
|
for (i = 0; i < ecc->steps; i++) {
|
|
const u8 *oob = nand->oob_poi + (i * (ecc->bytes + 4));
|
|
|
|
sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, i, !i, page);
|
|
}
|
|
|
|
sunxi_nfc_hw_ecc_enable(mtd);
|
|
sunxi_nfc_randomizer_config(mtd, page, false);
|
|
sunxi_nfc_randomizer_enable(mtd);
|
|
|
|
writel((NAND_CMD_RNDIN << 8) | NAND_CMD_PAGEPROG,
|
|
nfc->regs + NFC_REG_RCMD_SET);
|
|
|
|
dma_async_issue_pending(nfc->dmac);
|
|
|
|
writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD |
|
|
NFC_DATA_TRANS | NFC_ACCESS_DIR,
|
|
nfc->regs + NFC_REG_CMD);
|
|
|
|
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
|
|
if (ret)
|
|
dmaengine_terminate_all(nfc->dmac);
|
|
|
|
sunxi_nfc_randomizer_disable(mtd);
|
|
sunxi_nfc_hw_ecc_disable(mtd);
|
|
|
|
sunxi_nfc_dma_op_cleanup(mtd, DMA_TO_DEVICE, &sg);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (oob_required || (chip->options & NAND_NEED_SCRAMBLING))
|
|
/* TODO: use DMA to transfer extra OOB bytes ? */
|
|
sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi,
|
|
NULL, page);
|
|
|
|
return 0;
|
|
|
|
pio_fallback:
|
|
return sunxi_nfc_hw_ecc_write_page(mtd, chip, buf, oob_required, page);
|
|
}
|
|
|
|
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,
|
|
oob_required,
|
|
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 int sunxi_nfc_hw_common_ecc_read_oob(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
int page)
|
|
{
|
|
chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page);
|
|
|
|
chip->pagebuf = -1;
|
|
|
|
return chip->ecc.read_page(mtd, chip, chip->buffers->databuf, 1, page);
|
|
}
|
|
|
|
static int sunxi_nfc_hw_common_ecc_write_oob(struct mtd_info *mtd,
|
|
struct nand_chip *chip,
|
|
int page)
|
|
{
|
|
int ret, status;
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0, page);
|
|
|
|
chip->pagebuf = -1;
|
|
|
|
memset(chip->buffers->databuf, 0xff, mtd->writesize);
|
|
ret = chip->ecc.write_page(mtd, chip, chip->buffers->databuf, 1, page);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Send command to program the OOB data */
|
|
chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
|
|
|
|
status = chip->waitfunc(mtd, chip);
|
|
|
|
return status & NAND_STATUS_FAIL ? -EIO : 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_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 sunxi_nand_chip *chip = to_sunxi_nand(nand);
|
|
struct sunxi_nfc *nfc = to_sunxi_nfc(chip->nand.controller);
|
|
const struct nand_sdr_timings *timings;
|
|
u32 min_clk_period = 0;
|
|
s32 tWB, tADL, tWHR, tRHW, tCAD;
|
|
long real_clk_rate;
|
|
|
|
timings = nand_get_sdr_timings(conf);
|
|
if (IS_ERR(timings))
|
|
return -ENOTSUPP;
|
|
|
|
/* 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 */
|
|
if (timings->tWB_max > (min_clk_period * 20))
|
|
min_clk_period = DIV_ROUND_UP(timings->tWB_max, 20);
|
|
|
|
if (timings->tADL_min > (min_clk_period * 32))
|
|
min_clk_period = DIV_ROUND_UP(timings->tADL_min, 32);
|
|
|
|
if (timings->tWHR_min > (min_clk_period * 32))
|
|
min_clk_period = DIV_ROUND_UP(timings->tWHR_min, 32);
|
|
|
|
if (timings->tRHW_min > (min_clk_period * 20))
|
|
min_clk_period = DIV_ROUND_UP(timings->tRHW_min, 20);
|
|
|
|
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;
|
|
}
|
|
|
|
if (csline == NAND_DATA_IFACE_CHECK_ONLY)
|
|
return 0;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
/* Convert min_clk_period from picoseconds to nanoseconds */
|
|
min_clk_period = DIV_ROUND_UP(min_clk_period, 1000);
|
|
|
|
/*
|
|
* Unlike what is stated in Allwinner datasheet, the clk_rate should
|
|
* be set to (1 / min_clk_period), and not (2 / min_clk_period).
|
|
* This new formula was verified with a scope and validated by
|
|
* Allwinner engineers.
|
|
*/
|
|
chip->clk_rate = NSEC_PER_SEC / min_clk_period;
|
|
real_clk_rate = clk_round_rate(nfc->mod_clk, chip->clk_rate);
|
|
if (real_clk_rate <= 0) {
|
|
dev_err(nfc->dev, "Unable to round clk %lu\n", chip->clk_rate);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
min_clk_period = NSEC_PER_SEC / real_clk_rate;
|
|
chip->timing_ctl = ((min_clk_period * 2) < 30) ?
|
|
NFC_TIMING_CTL_EDO : 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sunxi_nand_ooblayout_ecc(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *oobregion)
|
|
{
|
|
struct nand_chip *nand = mtd_to_nand(mtd);
|
|
struct nand_ecc_ctrl *ecc = &nand->ecc;
|
|
|
|
if (section >= ecc->steps)
|
|
return -ERANGE;
|
|
|
|
oobregion->offset = section * (ecc->bytes + 4) + 4;
|
|
oobregion->length = ecc->bytes;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sunxi_nand_ooblayout_free(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *oobregion)
|
|
{
|
|
struct nand_chip *nand = mtd_to_nand(mtd);
|
|
struct nand_ecc_ctrl *ecc = &nand->ecc;
|
|
|
|
if (section > ecc->steps)
|
|
return -ERANGE;
|
|
|
|
/*
|
|
* The first 2 bytes are used for BB markers, hence we
|
|
* only have 2 bytes available in the first user data
|
|
* section.
|
|
*/
|
|
if (!section && ecc->mode == NAND_ECC_HW) {
|
|
oobregion->offset = 2;
|
|
oobregion->length = 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
oobregion->offset = section * (ecc->bytes + 4);
|
|
|
|
if (section < ecc->steps)
|
|
oobregion->length = 4;
|
|
else
|
|
oobregion->offset = mtd->oobsize - oobregion->offset;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mtd_ooblayout_ops sunxi_nand_ooblayout_ops = {
|
|
.ecc = sunxi_nand_ooblayout_ecc,
|
|
.free = sunxi_nand_ooblayout_free,
|
|
};
|
|
|
|
static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd,
|
|
struct nand_ecc_ctrl *ecc,
|
|
struct device_node *np)
|
|
{
|
|
static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 };
|
|
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_hw_ecc *data;
|
|
int nsectors;
|
|
int ret;
|
|
int i;
|
|
|
|
if (ecc->options & NAND_ECC_MAXIMIZE) {
|
|
int bytes;
|
|
|
|
ecc->size = 1024;
|
|
nsectors = mtd->writesize / ecc->size;
|
|
|
|
/* Reserve 2 bytes for the BBM */
|
|
bytes = (mtd->oobsize - 2) / nsectors;
|
|
|
|
/* 4 non-ECC bytes are added before each ECC bytes section */
|
|
bytes -= 4;
|
|
|
|
/* and bytes has to be even. */
|
|
if (bytes % 2)
|
|
bytes--;
|
|
|
|
ecc->strength = bytes * 8 / fls(8 * ecc->size);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(strengths); i++) {
|
|
if (strengths[i] > ecc->strength)
|
|
break;
|
|
}
|
|
|
|
if (!i)
|
|
ecc->strength = 0;
|
|
else
|
|
ecc->strength = strengths[i - 1];
|
|
}
|
|
|
|
if (ecc->size != 512 && ecc->size != 1024)
|
|
return -EINVAL;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
/* 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);
|
|
|
|
nsectors = mtd->writesize / ecc->size;
|
|
|
|
if (mtd->oobsize < ((ecc->bytes + 4) * nsectors)) {
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
ecc->read_oob = sunxi_nfc_hw_common_ecc_read_oob;
|
|
ecc->write_oob = sunxi_nfc_hw_common_ecc_write_oob;
|
|
mtd_set_ooblayout(mtd, &sunxi_nand_ooblayout_ops);
|
|
ecc->priv = data;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
kfree(data);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sunxi_nand_hw_common_ecc_ctrl_cleanup(struct nand_ecc_ctrl *ecc)
|
|
{
|
|
kfree(ecc->priv);
|
|
}
|
|
|
|
static int sunxi_nand_hw_ecc_ctrl_init(struct mtd_info *mtd,
|
|
struct nand_ecc_ctrl *ecc,
|
|
struct device_node *np)
|
|
{
|
|
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;
|
|
|
|
ret = sunxi_nand_hw_common_ecc_ctrl_init(mtd, ecc, np);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (nfc->dmac) {
|
|
ecc->read_page = sunxi_nfc_hw_ecc_read_page_dma;
|
|
ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage_dma;
|
|
ecc->write_page = sunxi_nfc_hw_ecc_write_page_dma;
|
|
nand->options |= NAND_USE_BOUNCE_BUFFER;
|
|
} else {
|
|
ecc->read_page = sunxi_nfc_hw_ecc_read_page;
|
|
ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage;
|
|
ecc->write_page = sunxi_nfc_hw_ecc_write_page;
|
|
}
|
|
|
|
/* TODO: support DMA for raw accesses and subpage write */
|
|
ecc->write_subpage = sunxi_nfc_hw_ecc_write_subpage;
|
|
ecc->read_oob_raw = nand_read_oob_std;
|
|
ecc->write_oob_raw = nand_write_oob_std;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sunxi_nand_hw_syndrome_ecc_ctrl_init(struct mtd_info *mtd,
|
|
struct nand_ecc_ctrl *ecc,
|
|
struct device_node *np)
|
|
{
|
|
int ret;
|
|
|
|
ret = sunxi_nand_hw_common_ecc_ctrl_init(mtd, ecc, np);
|
|
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;
|
|
ecc->read_oob_raw = nand_read_oob_syndrome;
|
|
ecc->write_oob_raw = nand_write_oob_syndrome;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int sunxi_nand_ecc_init(struct mtd_info *mtd, struct nand_ecc_ctrl *ecc,
|
|
struct device_node *np)
|
|
{
|
|
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_HW:
|
|
ret = sunxi_nand_hw_ecc_ctrl_init(mtd, ecc, np);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case NAND_ECC_HW_SYNDROME:
|
|
ret = sunxi_nand_hw_syndrome_ecc_ctrl_init(mtd, ecc, np);
|
|
if (ret)
|
|
return ret;
|
|
break;
|
|
case NAND_ECC_NONE:
|
|
case NAND_ECC_SOFT:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc,
|
|
struct device_node *np)
|
|
{
|
|
struct sunxi_nand_chip *chip;
|
|
struct mtd_info *mtd;
|
|
struct nand_chip *nand;
|
|
int nsels;
|
|
int ret;
|
|
int i;
|
|
u32 tmp;
|
|
|
|
if (!of_get_property(np, "reg", &nsels))
|
|
return -EINVAL;
|
|
|
|
nsels /= sizeof(u32);
|
|
if (!nsels) {
|
|
dev_err(dev, "invalid reg property size\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
chip = devm_kzalloc(dev,
|
|
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++) {
|
|
ret = of_property_read_u32_index(np, "reg", i, &tmp);
|
|
if (ret) {
|
|
dev_err(dev, "could not retrieve reg property: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
|
|
if (!of_property_read_u32_index(np, "allwinner,rb", i, &tmp) &&
|
|
tmp < 2) {
|
|
chip->sels[i].rb.type = RB_NATIVE;
|
|
chip->sels[i].rb.info.nativeid = tmp;
|
|
} else {
|
|
ret = of_get_named_gpio(np, "rb-gpios", i);
|
|
if (ret >= 0) {
|
|
tmp = ret;
|
|
chip->sels[i].rb.type = RB_GPIO;
|
|
chip->sels[i].rb.info.gpio = tmp;
|
|
ret = devm_gpio_request(dev, tmp, "nand-rb");
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = gpio_direction_input(tmp);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
chip->sels[i].rb.type = RB_NONE;
|
|
}
|
|
}
|
|
}
|
|
|
|
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_set_flash_node(nand, np);
|
|
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;
|
|
nand->setup_data_interface = sunxi_nfc_setup_data_interface;
|
|
|
|
mtd = nand_to_mtd(nand);
|
|
mtd->dev.parent = dev;
|
|
|
|
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_ecc_init(mtd, &nand->ecc, np);
|
|
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 = 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 sunxi_nand_chips_init(struct device *dev, struct sunxi_nfc *nfc)
|
|
{
|
|
struct device_node *np = dev->of_node;
|
|
struct device_node *nand_np;
|
|
int nchips = of_get_child_count(np);
|
|
int ret;
|
|
|
|
if (nchips > 8) {
|
|
dev_err(dev, "too many NAND chips: %d (max = 8)\n", nchips);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for_each_child_of_node(np, nand_np) {
|
|
ret = sunxi_nand_chip_init(dev, nfc, nand_np);
|
|
if (ret) {
|
|
of_node_put(nand_np);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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(nand_to_mtd(&chip->nand));
|
|
sunxi_nand_ecc_cleanup(&chip->nand.ecc);
|
|
list_del(&chip->node);
|
|
}
|
|
}
|
|
|
|
static int sunxi_nfc_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *r;
|
|
struct sunxi_nfc *nfc;
|
|
int irq;
|
|
int ret;
|
|
|
|
nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL);
|
|
if (!nfc)
|
|
return -ENOMEM;
|
|
|
|
nfc->dev = dev;
|
|
nand_hw_control_init(&nfc->controller);
|
|
INIT_LIST_HEAD(&nfc->chips);
|
|
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
nfc->regs = devm_ioremap_resource(dev, r);
|
|
if (IS_ERR(nfc->regs))
|
|
return PTR_ERR(nfc->regs);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
dev_err(dev, "failed to retrieve irq\n");
|
|
return irq;
|
|
}
|
|
|
|
nfc->ahb_clk = devm_clk_get(dev, "ahb");
|
|
if (IS_ERR(nfc->ahb_clk)) {
|
|
dev_err(dev, "failed to retrieve ahb clk\n");
|
|
return PTR_ERR(nfc->ahb_clk);
|
|
}
|
|
|
|
ret = clk_prepare_enable(nfc->ahb_clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
nfc->mod_clk = devm_clk_get(dev, "mod");
|
|
if (IS_ERR(nfc->mod_clk)) {
|
|
dev_err(dev, "failed to retrieve mod clk\n");
|
|
ret = PTR_ERR(nfc->mod_clk);
|
|
goto out_ahb_clk_unprepare;
|
|
}
|
|
|
|
ret = clk_prepare_enable(nfc->mod_clk);
|
|
if (ret)
|
|
goto out_ahb_clk_unprepare;
|
|
|
|
nfc->reset = devm_reset_control_get_optional_exclusive(dev, "ahb");
|
|
if (IS_ERR(nfc->reset)) {
|
|
ret = PTR_ERR(nfc->reset);
|
|
goto out_mod_clk_unprepare;
|
|
}
|
|
|
|
ret = reset_control_deassert(nfc->reset);
|
|
if (ret) {
|
|
dev_err(dev, "reset err %d\n", ret);
|
|
goto out_mod_clk_unprepare;
|
|
}
|
|
|
|
ret = sunxi_nfc_rst(nfc);
|
|
if (ret)
|
|
goto out_ahb_reset_reassert;
|
|
|
|
writel(0, nfc->regs + NFC_REG_INT);
|
|
ret = devm_request_irq(dev, irq, sunxi_nfc_interrupt,
|
|
0, "sunxi-nand", nfc);
|
|
if (ret)
|
|
goto out_ahb_reset_reassert;
|
|
|
|
nfc->dmac = dma_request_slave_channel(dev, "rxtx");
|
|
if (nfc->dmac) {
|
|
struct dma_slave_config dmac_cfg = { };
|
|
|
|
dmac_cfg.src_addr = r->start + NFC_REG_IO_DATA;
|
|
dmac_cfg.dst_addr = dmac_cfg.src_addr;
|
|
dmac_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
dmac_cfg.dst_addr_width = dmac_cfg.src_addr_width;
|
|
dmac_cfg.src_maxburst = 4;
|
|
dmac_cfg.dst_maxburst = 4;
|
|
dmaengine_slave_config(nfc->dmac, &dmac_cfg);
|
|
} else {
|
|
dev_warn(dev, "failed to request rxtx DMA channel\n");
|
|
}
|
|
|
|
platform_set_drvdata(pdev, nfc);
|
|
|
|
ret = sunxi_nand_chips_init(dev, nfc);
|
|
if (ret) {
|
|
dev_err(dev, "failed to init nand chips\n");
|
|
goto out_release_dmac;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_release_dmac:
|
|
if (nfc->dmac)
|
|
dma_release_channel(nfc->dmac);
|
|
out_ahb_reset_reassert:
|
|
reset_control_assert(nfc->reset);
|
|
out_mod_clk_unprepare:
|
|
clk_disable_unprepare(nfc->mod_clk);
|
|
out_ahb_clk_unprepare:
|
|
clk_disable_unprepare(nfc->ahb_clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int sunxi_nfc_remove(struct platform_device *pdev)
|
|
{
|
|
struct sunxi_nfc *nfc = platform_get_drvdata(pdev);
|
|
|
|
sunxi_nand_chips_cleanup(nfc);
|
|
|
|
reset_control_assert(nfc->reset);
|
|
|
|
if (nfc->dmac)
|
|
dma_release_channel(nfc->dmac);
|
|
clk_disable_unprepare(nfc->mod_clk);
|
|
clk_disable_unprepare(nfc->ahb_clk);
|
|
|
|
return 0;
|
|
}
|
|
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static const struct of_device_id sunxi_nfc_ids[] = {
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{ .compatible = "allwinner,sun4i-a10-nand" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, sunxi_nfc_ids);
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static struct platform_driver sunxi_nfc_driver = {
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.driver = {
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.name = "sunxi_nand",
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.of_match_table = sunxi_nfc_ids,
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},
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.probe = sunxi_nfc_probe,
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.remove = sunxi_nfc_remove,
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};
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module_platform_driver(sunxi_nfc_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Boris BREZILLON");
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MODULE_DESCRIPTION("Allwinner NAND Flash Controller driver");
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MODULE_ALIAS("platform:sunxi_nand");
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