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SubjectRe: [PATCH 2/3] mtd: hisilicon: add a new nand controller driver for hisilicon hip04 Soc

On 06/30/2014 11:03 AM, Zhou Wang wrote:
> Signed-off-by: Zhou Wang <wangzhou.bry@gmail.com>
> ---
> drivers/mtd/nand/Kconfig | 5 +
> drivers/mtd/nand/Makefile | 1 +
> drivers/mtd/nand/hisi_nand.c | 847 ++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 853 insertions(+)
> create mode 100644 drivers/mtd/nand/hisi_nand.c
>
> diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
> index 90ff447..253f8c8 100644
> --- a/drivers/mtd/nand/Kconfig
> +++ b/drivers/mtd/nand/Kconfig
> @@ -510,4 +510,9 @@ config MTD_NAND_XWAY
> Enables support for NAND Flash chips on Lantiq XWAY SoCs. NAND is attached
> to the External Bus Unit (EBU).
>
> +config MTD_NAND_HISI
> + tristate "Support for NAND controller on Hisilicon SoC"
> + help
> + Enables support for NAND controller on Hisilicon SoC.
> +
> endif # MTD_NAND
> diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
> index 542b568..d0881cf 100644
> --- a/drivers/mtd/nand/Makefile
> +++ b/drivers/mtd/nand/Makefile
> @@ -49,5 +49,6 @@ obj-$(CONFIG_MTD_NAND_JZ4740) += jz4740_nand.o
> obj-$(CONFIG_MTD_NAND_GPMI_NAND) += gpmi-nand/
> obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o
> obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/
> +obj-$(CONFIG_MTD_NAND_HISI) += hisi_nand.o
>
> nand-objs := nand_base.o nand_bbt.o
> diff --git a/drivers/mtd/nand/hisi_nand.c b/drivers/mtd/nand/hisi_nand.c
> new file mode 100644
> index 0000000..fbcb065
> --- /dev/null
> +++ b/drivers/mtd/nand/hisi_nand.c
> @@ -0,0 +1,847 @@
> +/*
> + * Hisilicon NAND Flash controller driver
> + *
> + * Copyright © 2012-2014 HiSilicon Technologies Co., Ltd.
> + * http://www.hisilicon.com
> + *
> + * Author: Zhou Wang <wangzhou.bry@gmail.com>
> + * The initial developer of the original code is Zhiyong Cai
> + * <caizhiyong@huawei.com>
> + *
> + * 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.
> + */
> +#include <linux/of.h>
> +#include <linux/of_mtd.h>
> +#include <linux/mtd/mtd.h>
> +#include <linux/sizes.h>
> +#include <linux/clk.h>
> +#include <linux/slab.h>
> +#include <linux/module.h>
> +#include <linux/delay.h>
> +#include <linux/interrupt.h>
> +#include <linux/mtd/nand.h>
> +#include <linux/dma-mapping.h>
> +#include <linux/platform_device.h>
> +#include <linux/mtd/partitions.h>
> +
> +#define HINFC504_MAX_CHIP (4)
> +#define HINFC504_W_LATCH (5)
> +#define HINFC504_R_LATCH (7)
> +#define HINFC504_RW_LATCH (3)
> +
> +#define HINFC504_NFC_TIMEOUT (2 * HZ)
> +#define HINFC504_NFC_DMA_TIMEOUT (5 * HZ)
> +#define HINFC504_CHIP_DELAY (25)
> +
> +#define HINFC504_REG_BASE_ADDRESS_LEN (0x100)
> +#define HINFC504_BUFFER_BASE_ADDRESS_LEN (2048 + 128)
> +
> +#define HINFC504_ADDR_CYCLE_MASK 0x4
> +
> +#define HINFC504_CON 0x00
> +#define HINFC504_CON_OP_MODE_NORMAL (1U << 0)
> +#define HINFC504_CON_PAGEISZE_SHIFT (1)
> +#define HINFC504_CON_PAGESIZE_MASK (0x07)
> +#define HINFC504_CON_BUS_WIDTH (1U << 4)
> +#define HINFC504_CON_READY_BUSY_SEL (1U << 8)
> +#define HINFC504_CON_ECCTYPE_SHIFT (9)
> +#define HINFC504_CON_ECCTYPE_MASK (0x07)
> +
> +#define HINFC504_PWIDTH 0x04
> +#define SET_HINFC504_PWIDTH(_w_lcnt, _r_lcnt, _rw_hcnt) \
> + ((_w_lcnt) | (((_r_lcnt) & 0x0F) << 4) | (((_rw_hcnt) & 0x0F) << 8))
> +
> +#define HINFC504_CMD 0x0C
> +#define HINFC504_ADDRL 0x10
> +#define HINFC504_ADDRH 0x14
> +#define HINFC504_DATA_NUM 0x18
> +
> +#define HINFC504_OP 0x1C
> +#define HINFC504_OP_READ_DATA_EN (1U << 1)
> +#define HINFC504_OP_WAIT_READY_EN (1U << 2)
> +#define HINFC504_OP_CMD2_EN (1U << 3)
> +#define HINFC504_OP_WRITE_DATA_EN (1U << 4)
> +#define HINFC504_OP_ADDR_EN (1U << 5)
> +#define HINFC504_OP_CMD1_EN (1U << 6)
> +#define HINFC504_OP_NF_CS_SHIFT (7)
> +#define HINFC504_OP_NF_CS_MASK (3)
> +#define HINFC504_OP_ADDR_CYCLE_SHIFT (9)
> +#define HINFC504_OP_ADDR_CYCLE_MASK (7)
> +
> +#define HINFC504_STATUS 0x20
> +#define HINFC504_READY (1U << 0)
> +
> +#define HINFC504_INTEN 0x24
> +#define HINFC504_INTEN_DMA (1U << 9)
> +#define HINFC504_INTEN_UE (1U << 6)
> +#define HINFC504_INTEN_CE (1U << 5)
> +
> +#define HINFC504_INTS 0x28
> +#define HINFC504_INTS_DMA (1U << 9)
> +#define HINFC504_INTS_UE (1U << 6)
> +#define HINFC504_INTS_CE (1U << 5)
> +
> +#define HINFC504_INTCLR 0x2C
> +#define HINFC504_INTCLR_DMA (1U << 9)
> +#define HINFC504_INTCLR_UE (1U << 6)
> +#define HINFC504_INTCLR_CE (1U << 5)
> +
> +#define HINFC504_ECC_STATUS 0x5C
> +#define HINFC504_ECC_1_BIT_SHIFT 16
> +#define HINFC504_ECC_16_BIT_SHIFT 12
> +
> +#define HINFC504_DMA_CTRL 0x60
> +#define HINFC504_DMA_CTRL_DMA_START (1U << 0)
> +#define HINFC504_DMA_CTRL_WE (1U << 1)
> +#define HINFC504_DMA_CTRL_DATA_AREA_EN (1U << 2)
> +#define HINFC504_DMA_CTRL_OOB_AREA_EN (1U << 3)
> +#define HINFC504_DMA_CTRL_BURST4_EN (1U << 4)
> +#define HINFC504_DMA_CTRL_BURST8_EN (1U << 5)
> +#define HINFC504_DMA_CTRL_BURST16_EN (1U << 6)
> +#define HINFC504_DMA_CTRL_ADDR_NUM_SHIFT (7)
> +#define HINFC504_DMA_CTRL_ADDR_NUM_MASK (1)
> +#define HINFC504_DMA_CTRL_CS_SHIFT (8)
> +#define HINFC504_DMA_CTRL_CS_MASK (0x03)
> +
> +#define HINFC504_DMA_ADDR_DATA 0x64
> +#define HINFC504_DMA_ADDR_OOB 0x68
> +
> +#define HINFC504_DMA_LEN 0x6C
> +#define HINFC504_DMA_LEN_OOB_SHIFT (16)
> +#define HINFC504_DMA_LEN_OOB_MASK (0xFFF)
> +
> +#define HINFC504_DMA_PARA 0x70
> +#define HINFC504_DMA_PARA_DATA_RW_EN (1U << 0)
> +#define HINFC504_DMA_PARA_OOB_RW_EN (1U << 1)
> +#define HINFC504_DMA_PARA_DATA_EDC_EN (1U << 2)
> +#define HINFC504_DMA_PARA_OOB_EDC_EN (1U << 3)
> +#define HINFC504_DMA_PARA_DATA_ECC_EN (1U << 4)
> +#define HINFC504_DMA_PARA_OOB_ECC_EN (1U << 5)
> +
> +#define HINFC_VERSION 0x74
> +#define HINFC504_LOG_READ_ADDR 0x7C
> +#define HINFC504_LOG_READ_LEN 0x80
> +
> +#define HINFC504_NANDINFO_LEN 0x10
> +
> +#define hinfc_read(_host, _reg) readl(_host->iobase + (_reg))
> +#define hinfc_write(_host, _value, _reg)\
> + writel((_value), _host->iobase + (_reg))
> +
> +struct hinfc_host {
> + struct nand_chip *chip;
> + struct mtd_info *mtd;
> + struct device *dev;
> + void __iomem *iobase;
> + struct completion cmd_complete;
> + unsigned int offset;
> + unsigned int command;
> + int chipselect;
> + unsigned int addr_cycle;
> + unsigned int addr_value[2];
> + unsigned int cache_addr_value[2];
> + char *buffer;
> + dma_addr_t dma_buffer;
> + dma_addr_t dma_oob;
> + int version;
> + unsigned int ecc_bits;
> + unsigned int irq_status; /* interrupt status */
> +
> + int (*send_cmd_pageprog)(struct hinfc_host *host);
> + int (*send_cmd_status)(struct hinfc_host *host);
> + int (*send_cmd_readstart)(struct hinfc_host *host);
> + int (*send_cmd_erase)(struct hinfc_host *host);
> + int (*send_cmd_readid)(struct hinfc_host *host);
> + int (*send_cmd_reset)(struct hinfc_host *host, int chipselect);
> +};
> +
> +void wait_controller_finished(struct hinfc_host *host)
> +{
> + unsigned long timeout = jiffies + HINFC504_NFC_TIMEOUT;
> + int val;
> +
> + while (time_before(jiffies, timeout)) {
> + val = hinfc_read(host, HINFC504_STATUS);
> + if (host->command == NAND_CMD_ERASE2) {
> + /* nfc is ready */
> + while (!(val & HINFC504_READY)) {
> + usleep_range(500, 1000);
> + val = hinfc_read(host, HINFC504_STATUS);
> + }
> + return;
> + } else {
> + if (val & HINFC504_READY)
> + return;
> + }
> + }
> +
> + /* wait cmd timeout */
> + dev_err(host->dev, "Wait NAND controller exec cmd timeout.\n");
> +}
> +
> +static void hisi_nfc_dma_transfer(struct hinfc_host *host, int todev)
> +{
> + struct mtd_info *mtd = host->mtd;
> + struct nand_chip *chip = mtd->priv;
> + unsigned long val;
> + int ret;
> +
> + hinfc_write(host, host->dma_buffer, HINFC504_DMA_ADDR_DATA);
> + hinfc_write(host, host->dma_oob, HINFC504_DMA_ADDR_OOB);
> +
> + if (chip->ecc.mode == NAND_ECC_NONE) {
> + hinfc_write(host, ((mtd->oobsize & HINFC504_DMA_LEN_OOB_MASK)
> + << HINFC504_DMA_LEN_OOB_SHIFT), HINFC504_DMA_LEN);
> +
> + hinfc_write(host, HINFC504_DMA_PARA_DATA_RW_EN
> + | HINFC504_DMA_PARA_OOB_RW_EN, HINFC504_DMA_PARA);
> + } else

Add {} for else also
./scripts/checkpatch.pl.

--
Regards,
Ivan Khoronzhuk

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