linux-kernel - RE: [PATCH] spi: spi-fsl-qspi: Introduce variable to fix different invalid master Id

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Date:   Mon, 7 Oct 2019 14:56:39 +0000
From:   Han Xu <han.xu@....com>
To:     Kuldeep Singh <kuldeep.singh@....com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Kuldeep Singh <kuldeep.singh@....com>
Subject: RE: [PATCH] spi: spi-fsl-qspi: Introduce variable to fix different
 invalid master Id



> -----Original Message-----
> From: Kuldeep Singh <kuldeep.singh@....com>
> Sent: Tuesday, October 1, 2019 3:59 AM
> To: Han Xu <han.xu@....com>; broonie@...nel.org; linux-spi@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Cc: Kuldeep Singh <kuldeep.singh@....com>; Suresh Gupta
> <suresh.gupta@....com>
> Subject: [PATCH] spi: spi-fsl-qspi: Introduce variable to fix different invalid master Id
> 
> Different platforms have different Master with different SourceID on AHB bus. The
> 0X0E Master ID is used by cluster 3 in case of LS2088A.
> So, patch introduce an invalid master id variable to fix invalid mastered on different
> platforms.
> 
> Signed-off-by: Suresh Gupta <suresh.gupta@....com>
> Signed-off-by: Kuldeep Singh <kuldeep.singh@....com>
> ---
>  drivers/spi/spi-fsl-qspi.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/spi/spi-fsl-qspi.c b/drivers/spi/spi-fsl-qspi.c index
> c02e24c..51385b0 100644
> --- a/drivers/spi/spi-fsl-qspi.c
> +++ b/drivers/spi/spi-fsl-qspi.c
> @@ -63,6 +63,11 @@
>  #define QUADSPI_IPCR			0x08
>  #define QUADSPI_IPCR_SEQID(x)		((x) << 24)
> 
> +#define QUADSPI_BUF0CR                  0x10
> +#define QUADSPI_BUF1CR                  0x14
> +#define QUADSPI_BUF2CR                  0x18
> +#define QUADSPI_BUFXCR_INVALID_MSTRID   0xe
> +
>  #define QUADSPI_BUF3CR			0x1c
>  #define QUADSPI_BUF3CR_ALLMST_MASK	BIT(31)
>  #define QUADSPI_BUF3CR_ADATSZ(x)	((x) << 8)
> @@ -184,6 +189,7 @@
>  struct fsl_qspi_devtype_data {
>  	unsigned int rxfifo;
>  	unsigned int txfifo;
> +	int invalid_mstrid;
>  	unsigned int ahb_buf_size;
>  	unsigned int quirks;
>  	bool little_endian;
> @@ -192,6 +198,7 @@ struct fsl_qspi_devtype_data {  static const struct
> fsl_qspi_devtype_data vybrid_data = {
>  	.rxfifo = SZ_128,
>  	.txfifo = SZ_64,
> +	.invalid_mstrid = QUADSPI_BUFXCR_INVALID_MSTRID,
>  	.ahb_buf_size = SZ_1K,
>  	.quirks = QUADSPI_QUIRK_SWAP_ENDIAN,
>  	.little_endian = true,
> @@ -200,6 +207,7 @@ static const struct fsl_qspi_devtype_data vybrid_data =
> {  static const struct fsl_qspi_devtype_data imx6sx_data = {
>  	.rxfifo = SZ_128,
>  	.txfifo = SZ_512,
> +	.invalid_mstrid = QUADSPI_BUFXCR_INVALID_MSTRID,
>  	.ahb_buf_size = SZ_1K,
>  	.quirks = QUADSPI_QUIRK_4X_INT_CLK | QUADSPI_QUIRK_TKT245618,
>  	.little_endian = true,
> @@ -208,6 +216,7 @@ static const struct fsl_qspi_devtype_data imx6sx_data =
> {  static const struct fsl_qspi_devtype_data imx7d_data = {
>  	.rxfifo = SZ_128,
>  	.txfifo = SZ_512,
> +	.invalid_mstrid = QUADSPI_BUFXCR_INVALID_MSTRID,
>  	.ahb_buf_size = SZ_1K,
>  	.quirks = QUADSPI_QUIRK_TKT253890 | QUADSPI_QUIRK_4X_INT_CLK,
>  	.little_endian = true,
> @@ -216,6 +225,7 @@ static const struct fsl_qspi_devtype_data imx7d_data =
> {  static const struct fsl_qspi_devtype_data imx6ul_data = {
>  	.rxfifo = SZ_128,
>  	.txfifo = SZ_512,
> +	.invalid_mstrid = QUADSPI_BUFXCR_INVALID_MSTRID,
>  	.ahb_buf_size = SZ_1K,
>  	.quirks = QUADSPI_QUIRK_TKT253890 | QUADSPI_QUIRK_4X_INT_CLK,
>  	.little_endian = true,
> @@ -224,6 +234,7 @@ static const struct fsl_qspi_devtype_data imx6ul_data =
> {  static const struct fsl_qspi_devtype_data ls1021a_data = {
>  	.rxfifo = SZ_128,
>  	.txfifo = SZ_64,
> +	.invalid_mstrid = QUADSPI_BUFXCR_INVALID_MSTRID,
>  	.ahb_buf_size = SZ_1K,
>  	.quirks = 0,
>  	.little_endian = false,
> @@ -233,6 +244,7 @@ static const struct fsl_qspi_devtype_data ls2080a_data = {
>  	.rxfifo = SZ_128,
>  	.txfifo = SZ_64,
>  	.ahb_buf_size = SZ_1K,
> +	.invalid_mstrid = 0x0,
>  	.quirks = QUADSPI_QUIRK_TKT253890 | QUADSPI_QUIRK_BASE_INTERNAL,
>  	.little_endian = true,
>  };
> @@ -615,6 +627,7 @@ static int fsl_qspi_exec_op(struct spi_mem *mem, const
> struct spi_mem_op *op)
>  	void __iomem *base = q->iobase;
>  	u32 addr_offset = 0;
>  	int err = 0;
> +	int invalid_mstrid = q->devtype_data->invalid_mstrid;
> 
>  	mutex_lock(&q->lock);
> 
> @@ -638,6 +651,10 @@ static int fsl_qspi_exec_op(struct spi_mem *mem, const
> struct spi_mem_op *op)
>  	qspi_writel(q, QUADSPI_SPTRCLR_BFPTRC | QUADSPI_SPTRCLR_IPPTRC,
>  		    base + QUADSPI_SPTRCLR);
> 
> +	qspi_writel(q, invalid_mstrid, base + QUADSPI_BUF0CR);
> +	qspi_writel(q, invalid_mstrid, base + QUADSPI_BUF1CR);
> +	qspi_writel(q, invalid_mstrid, base + QUADSPI_BUF2CR);
> +
>  	fsl_qspi_prepare_lut(q, op);
> 
>  	/*

Acked-by: Han Xu <han.xu@....com>

> --
> 2.7.4