linux-kernel - Re: [PATCH v3 1/9] mtd:fsl-quadspi:use the property fields of SPI-NOR

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <8d47aefc-063e-533e-e988-57d3bd5c25a8@atmel.com>
Date:   Fri, 27 Jan 2017 11:27:02 +0100
From:   Cyrille Pitchen <cyrille.pitchen@...el.com>
To:     Yunhui Cui <B56489@...escale.com>, <dwmw2@...radead.org>,
        <computersforpeace@...il.com>, <han.xu@...escale.com>,
        <jagannadh.teki@...il.com>
CC:     Yunhui Cui <yunhui.cui@....com>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <yao.yuan@....com>
Subject: Re: [PATCH v3 1/9] mtd:fsl-quadspi:use the property fields of SPI-NOR

Le 18/08/2016 à 09:37, Yunhui Cui a écrit :
> We can get the read/write/erase opcode from the spi nor framework
> directly. This patch uses the information stored in the SPI-NOR to
> remove the hardcode in the fsl_qspi_init_lut().
> 
> Signed-off-by: Yunhui Cui <B56489@...escale.com>
> Signed-off-by: Yunhui Cui <yunhui.cui@....com>

Applied to the spi-nor tree

Thanks!
> ---
>  drivers/mtd/spi-nor/fsl-quadspi.c | 40 ++++++++++++---------------------------
>  1 file changed, 12 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
> index 5c82e4e..5ad6402 100644
> --- a/drivers/mtd/spi-nor/fsl-quadspi.c
> +++ b/drivers/mtd/spi-nor/fsl-quadspi.c
> @@ -373,9 +373,13 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
>  	void __iomem *base = q->iobase;
>  	int rxfifo = q->devtype_data->rxfifo;
>  	u32 lut_base;
> -	u8 cmd, addrlen, dummy;
>  	int i;
>  
> +	struct spi_nor *nor = &q->nor[0];
> +	u8 addrlen = (nor->addr_width == 3) ? ADDR24BIT : ADDR32BIT;
> +	u8 read_op = nor->read_opcode;
> +	u8 read_dm = nor->read_dummy;
> +
>  	fsl_qspi_unlock_lut(q);
>  
>  	/* Clear all the LUT table */
> @@ -385,20 +389,10 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
>  	/* Quad Read */
>  	lut_base = SEQID_QUAD_READ * 4;
>  
> -	if (q->nor_size <= SZ_16M) {
> -		cmd = SPINOR_OP_READ_1_1_4;
> -		addrlen = ADDR24BIT;
> -		dummy = 8;
> -	} else {
> -		/* use the 4-byte address */
> -		cmd = SPINOR_OP_READ_1_1_4;
> -		addrlen = ADDR32BIT;
> -		dummy = 8;
> -	}
> -
> -	qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
> +	qspi_writel(q, LUT0(CMD, PAD1, read_op) | LUT1(ADDR, PAD1, addrlen),
>  			base + QUADSPI_LUT(lut_base));
> -	qspi_writel(q, LUT0(DUMMY, PAD1, dummy) | LUT1(FSL_READ, PAD4, rxfifo),
> +	qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
> +		    LUT1(FSL_READ, PAD4, rxfifo),
>  			base + QUADSPI_LUT(lut_base + 1));
>  
>  	/* Write enable */
> @@ -409,16 +403,8 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
>  	/* Page Program */
>  	lut_base = SEQID_PP * 4;
>  
> -	if (q->nor_size <= SZ_16M) {
> -		cmd = SPINOR_OP_PP;
> -		addrlen = ADDR24BIT;
> -	} else {
> -		/* use the 4-byte address */
> -		cmd = SPINOR_OP_PP;
> -		addrlen = ADDR32BIT;
> -	}
> -
> -	qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
> +	qspi_writel(q, LUT0(CMD, PAD1, nor->program_opcode) |
> +		    LUT1(ADDR, PAD1, addrlen),
>  			base + QUADSPI_LUT(lut_base));
>  	qspi_writel(q, LUT0(FSL_WRITE, PAD1, 0),
>  			base + QUADSPI_LUT(lut_base + 1));
> @@ -432,10 +418,8 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
>  	/* Erase a sector */
>  	lut_base = SEQID_SE * 4;
>  
> -	cmd = q->nor[0].erase_opcode;
> -	addrlen = q->nor_size <= SZ_16M ? ADDR24BIT : ADDR32BIT;
> -
> -	qspi_writel(q, LUT0(CMD, PAD1, cmd) | LUT1(ADDR, PAD1, addrlen),
> +	qspi_writel(q, LUT0(CMD, PAD1, nor->erase_opcode) |
> +		    LUT1(ADDR, PAD1, addrlen),
>  			base + QUADSPI_LUT(lut_base));
>  
>  	/* Erase the whole chip */
>