From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: Mon, 2 Mar 2020 02:19:55 +0200
Subject: spi: spi-fsl-dspi: Parameterize the FIFO size and DMA buffer size

Git-commit: 1d8b4c95c37ccccfc18adef7a13b79fbc3e1557e
Patch-mainline: v5.7-rc1
References: bsc#1167260

Get rid of the ifdef for Coldfire and make these hardware
characteristics part of dspi->devtype_data.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Message-Id: <20200302001958.11105-4-olteanv@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
---
 drivers/spi/spi-fsl-dspi.c |   48 ++++++++++++++++++++++++++-------------------
 1 file changed, 28 insertions(+), 20 deletions(-)

--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -20,13 +20,6 @@
 
 #define DRIVER_NAME			"fsl-dspi"
 
-#ifdef CONFIG_M5441x
-#define DSPI_FIFO_SIZE			16
-#else
-#define DSPI_FIFO_SIZE			4
-#endif
-#define DSPI_DMA_BUFSIZE		(DSPI_FIFO_SIZE * 1024)
-
 #define SPI_MCR				0x00
 #define SPI_MCR_MASTER			BIT(31)
 #define SPI_MCR_PCSIS			(0x3F << 16)
@@ -130,6 +123,8 @@ struct fsl_dspi_devtype_data {
 	enum dspi_trans_mode	trans_mode;
 	u8			max_clock_factor;
 	bool			xspi_mode;
+	int			fifo_size;
+	int			dma_bufsize;
 };
 
 enum {
@@ -148,47 +143,57 @@ static const struct fsl_dspi_devtype_dat
 	[VF610] = {
 		.trans_mode		= DSPI_DMA_MODE,
 		.max_clock_factor	= 2,
+		.dma_bufsize		= 4096,
+		.fifo_size		= 4,
 	},
 	[LS1021A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
 		.xspi_mode		= true,
+		.fifo_size		= 4,
 	},
 	[LS1012A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
 		.xspi_mode		= true,
+		.fifo_size		= 16,
 	},
 	[LS1043A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
 		.xspi_mode		= true,
+		.fifo_size		= 16,
 	},
 	[LS1046A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
 		.xspi_mode		= true,
+		.fifo_size		= 16,
 	},
 	[LS2080A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
+		.fifo_size		= 4,
 	},
 	[LS2085A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
+		.fifo_size		= 4,
 	},
 	[LX2160A] = {
 		.trans_mode		= DSPI_TCFQ_MODE,
 		.max_clock_factor	= 8,
+		.fifo_size		= 4,
 	},
 	[MCF5441X] = {
 		.trans_mode		= DSPI_EOQ_MODE,
 		.max_clock_factor	= 8,
+		.fifo_size		= 16,
 	},
 };
 
 struct fsl_dspi_dma {
-	/* Length of transfer in words of DSPI_FIFO_SIZE */
+	/* Length of transfer in words of dspi->fifo_size */
 	u32					curr_xfer_len;
 
 	u32					*tx_dma_buf;
@@ -388,7 +393,8 @@ static int dspi_dma_xfer(struct fsl_dspi
 	int ret = 0;
 
 	curr_remaining_bytes = dspi->len;
-	bytes_per_buffer = DSPI_DMA_BUFSIZE / DSPI_FIFO_SIZE;
+	bytes_per_buffer = dspi->devtype_data->dma_bufsize /
+			   dspi->devtype_data->fifo_size;
 	while (curr_remaining_bytes) {
 		/* Check if current transfer fits the DMA buffer */
 		dma->curr_xfer_len = curr_remaining_bytes
@@ -440,14 +446,14 @@ static int dspi_request_dma(struct fsl_d
 		goto err_tx_channel;
 	}
 
-	dma->tx_dma_buf = dma_alloc_coherent(dev, DSPI_DMA_BUFSIZE,
+	dma->tx_dma_buf = dma_alloc_coherent(dev, dspi->devtype_data->dma_bufsize,
 					     &dma->tx_dma_phys, GFP_KERNEL);
 	if (!dma->tx_dma_buf) {
 		ret = -ENOMEM;
 		goto err_tx_dma_buf;
 	}
 
-	dma->rx_dma_buf = dma_alloc_coherent(dev, DSPI_DMA_BUFSIZE,
+	dma->rx_dma_buf = dma_alloc_coherent(dev, dspi->devtype_data->dma_bufsize,
 					     &dma->rx_dma_phys, GFP_KERNEL);
 	if (!dma->rx_dma_buf) {
 		ret = -ENOMEM;
@@ -484,11 +490,11 @@ static int dspi_request_dma(struct fsl_d
 	return 0;
 
 err_slave_config:
-	dma_free_coherent(dev, DSPI_DMA_BUFSIZE,
-			dma->rx_dma_buf, dma->rx_dma_phys);
+	dma_free_coherent(dev, dspi->devtype_data->dma_bufsize,
+			  dma->rx_dma_buf, dma->rx_dma_phys);
 err_rx_dma_buf:
-	dma_free_coherent(dev, DSPI_DMA_BUFSIZE,
-			dma->tx_dma_buf, dma->tx_dma_phys);
+	dma_free_coherent(dev, dspi->devtype_data->dma_bufsize,
+			  dma->tx_dma_buf, dma->tx_dma_phys);
 err_tx_dma_buf:
 	dma_release_channel(dma->chan_tx);
 err_tx_channel:
@@ -510,13 +516,15 @@ static void dspi_release_dma(struct fsl_
 
 	if (dma->chan_tx) {
 		dma_unmap_single(dev, dma->tx_dma_phys,
-				 DSPI_DMA_BUFSIZE, DMA_TO_DEVICE);
+				 dspi->devtype_data->dma_bufsize,
+				 DMA_TO_DEVICE);
 		dma_release_channel(dma->chan_tx);
 	}
 
 	if (dma->chan_rx) {
 		dma_unmap_single(dev, dma->rx_dma_phys,
-				 DSPI_DMA_BUFSIZE, DMA_FROM_DEVICE);
+				 dspi->devtype_data->dma_bufsize,
+				 DMA_FROM_DEVICE);
 		dma_release_channel(dma->chan_rx);
 	}
 }
@@ -648,7 +656,7 @@ static void dspi_tcfq_read(struct fsl_ds
 
 static void dspi_eoq_write(struct fsl_dspi *dspi)
 {
-	int fifo_size = DSPI_FIFO_SIZE;
+	int fifo_size = dspi->devtype_data->fifo_size;
 	u16 xfer_cmd = dspi->tx_cmd;
 
 	/* Fill TX FIFO with as many transfers as possible */
@@ -658,7 +666,7 @@ static void dspi_eoq_write(struct fsl_ds
 		if (dspi->len == dspi->bytes_per_word || fifo_size == 0)
 			dspi->tx_cmd |= SPI_PUSHR_CMD_EOQ;
 		/* Clear transfer count for first transfer in FIFO */
-		if (fifo_size == (DSPI_FIFO_SIZE - 1))
+		if (fifo_size == (dspi->devtype_data->fifo_size - 1))
 			dspi->tx_cmd |= SPI_PUSHR_CMD_CTCNT;
 		/* Write combined TX FIFO and CMD FIFO entry */
 		fifo_write(dspi);
@@ -667,7 +675,7 @@ static void dspi_eoq_write(struct fsl_ds
 
 static void dspi_eoq_read(struct fsl_dspi *dspi)
 {
-	int fifo_size = DSPI_FIFO_SIZE;
+	int fifo_size = dspi->devtype_data->fifo_size;
 
 	/* Read one FIFO entry and push to rx buffer */
 	while ((dspi->rx < dspi->rx_end) && fifo_size--)