Merge remote-tracking branch 'origin/spi/qspi' into spi/next

* origin/spi/qspi:
  spi: spi-fsl-qspi: Introduce variable to fix different invalid master Id
  dt-bindings: spi: spi-fsl-qspi: Add bindings of ls1088a and ls1012a
  spi: spi-fsl-qspi: dynamically alloc AHB memory for QSPI

Documentation/devicetree/bindings/spi/spi-fsl-qspi.txt

@@ -6,6 +6,8 @@ Required properties:
 		 "fsl,ls1021a-qspi", "fsl,ls2080a-qspi"
 		 or
 		 "fsl,ls1043a-qspi" followed by "fsl,ls1021a-qspi"
+		 "fsl,ls1012a-qspi" followed by "fsl,ls1021a-qspi"
+		 "fsl,ls1088a-qspi" followed by "fsl,ls2080a-qspi"
   - reg : the first contains the register location and length,
           the second contains the memory mapping address and length
   - reg-names: Should contain the reg names "QuadSPI" and "QuadSPI-memory"

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)
@@ -181,9 +186,12 @@
  */
 #define QUADSPI_QUIRK_BASE_INTERNAL	BIT(4)
 
+#define QUADSPI_MIN_IOMAP		SZ_4M
+
 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 +200,7 @@ 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 +209,7 @@ 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 +218,7 @@ 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 +227,7 @@ 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 +236,7 @@ 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 +246,7 @@ 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,
 };
@@ -241,6 +255,9 @@ struct fsl_qspi {
 	void __iomem *iobase;
 	void __iomem *ahb_addr;
 	u32 memmap_phy;
+	u32 memmap_phy_size;
+	u32 memmap_start;
+	u32 memmap_len;
 	struct clk *clk, *clk_en;
 	struct device *dev;
 	struct completion c;
@@ -519,11 +536,34 @@ static void fsl_qspi_select_mem(struct fsl_qspi *q, struct spi_device *spi)
 	fsl_qspi_invalidate(q);
 }
 
-static void fsl_qspi_read_ahb(struct fsl_qspi *q, const struct spi_mem_op *op)
+static int fsl_qspi_read_ahb(struct fsl_qspi *q, const struct spi_mem_op *op)
 {
+	u32 start = op->addr.val + q->selected * q->memmap_phy_size / 4;
+	u32 len = op->data.nbytes;
+
+	/* if necessary, ioremap before AHB read */
+	if ((!q->ahb_addr) || start < q->memmap_start ||
+	    start + len > q->memmap_start + q->memmap_len) {
+		if (q->ahb_addr) {
+			iounmap(q->ahb_addr);
+		}
+
+		q->memmap_start = start;
+		q->memmap_len = len > QUADSPI_MIN_IOMAP ?
+				len : QUADSPI_MIN_IOMAP;
+
+		q->ahb_addr = ioremap_wc(q->memmap_phy + q->memmap_start,
+					 q->memmap_len);
+		if (!q->ahb_addr) {
+			dev_err(q->dev, "failed to alloc memory\n");
+			return -ENOMEM;
+		}
+	}
+
 	memcpy_fromio(op->data.buf.in,
-		      q->ahb_addr + q->selected * q->devtype_data->ahb_buf_size,
-		      op->data.nbytes);
+		      q->ahb_addr + start - q->memmap_start, len);
+
+	return 0;
 }
 
 static void fsl_qspi_fill_txfifo(struct fsl_qspi *q,
@@ -615,6 +655,7 @@ 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);
 
@@ -628,7 +669,7 @@ static int fsl_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
 		addr_offset = q->memmap_phy;
 
 	qspi_writel(q,
-		    q->selected * q->devtype_data->ahb_buf_size + addr_offset,
+		    q->selected * q->memmap_phy_size / 4 + addr_offset,
 		    base + QUADSPI_SFAR);
 
 	qspi_writel(q, qspi_readl(q, base + QUADSPI_MCR) |
@@ -638,6 +679,10 @@ 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);
 
 	/*
@@ -647,7 +692,7 @@ static int fsl_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
 	 */
 	if (op->data.nbytes > (q->devtype_data->rxfifo - 4) &&
 	    op->data.dir == SPI_MEM_DATA_IN) {
-		fsl_qspi_read_ahb(q, op);
+		err = fsl_qspi_read_ahb(q, op);
 	} else {
 		qspi_writel(q, QUADSPI_RBCT_WMRK_MASK |
 			    QUADSPI_RBCT_RXBRD_USEIPS, base + QUADSPI_RBCT);
@@ -735,16 +780,16 @@ static int fsl_qspi_default_setup(struct fsl_qspi *q)
 	 * In HW there can be a maximum of four chips on two buses with
 	 * two chip selects on each bus. We use four chip selects in SW
 	 * to differentiate between the four chips.
-	 * We use ahb_buf_size for each chip and set SFA1AD, SFA2AD, SFB1AD,
-	 * SFB2AD accordingly.
+	 * We divide the total memory region size equally for each chip
+	 * and set SFA1AD, SFA2AD, SFB1AD, SFB2AD accordingly.
 	 */
-	qspi_writel(q, q->devtype_data->ahb_buf_size + addr_offset,
+	qspi_writel(q, q->memmap_phy_size / 4 + addr_offset,
 		    base + QUADSPI_SFA1AD);
-	qspi_writel(q, q->devtype_data->ahb_buf_size * 2 + addr_offset,
+	qspi_writel(q, q->memmap_phy_size / 4 * 2 + addr_offset,
 		    base + QUADSPI_SFA2AD);
-	qspi_writel(q, q->devtype_data->ahb_buf_size * 3 + addr_offset,
+	qspi_writel(q, q->memmap_phy_size / 4 * 3 + addr_offset,
 		    base + QUADSPI_SFB1AD);
-	qspi_writel(q, q->devtype_data->ahb_buf_size * 4 + addr_offset,
+	qspi_writel(q, q->memmap_phy_size / 4 * 4 + addr_offset,
 		    base + QUADSPI_SFB2AD);
 
 	q->selected = -1;
@@ -831,13 +876,8 @@ static int fsl_qspi_probe(struct platform_device *pdev)
 
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 					"QuadSPI-memory");
-	q->ahb_addr = devm_ioremap_resource(dev, res);
-	if (IS_ERR(q->ahb_addr)) {
-		ret = PTR_ERR(q->ahb_addr);
-		goto err_put_ctrl;
-	}
-
 	q->memmap_phy = res->start;
+	q->memmap_phy_size = resource_size(res);
 
 	/* find the clocks */
 	q->clk_en = devm_clk_get(dev, "qspi_en");
@@ -911,6 +951,9 @@ static int fsl_qspi_remove(struct platform_device *pdev)
 
 	mutex_destroy(&q->lock);
 
+	if (q->ahb_addr)
+		iounmap(q->ahb_addr);
+
 	return 0;
 }