1 files changed, 233 insertions, 123 deletions

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 0dcd49114095..4bd4377551b5 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -24,6 +24,7 @@
 
 #define SPI_MCR				0x00
 #define SPI_MCR_HOST			BIT(31)
+#define SPI_MCR_MTFE			BIT(26)
 #define SPI_MCR_PCSIS(x)		((x) << 16)
 #define SPI_MCR_CLR_TXF			BIT(11)
 #define SPI_MCR_CLR_RXF			BIT(10)
@@ -35,8 +36,9 @@
 #define SPI_TCR				0x08
 #define SPI_TCR_GET_TCNT(x)		(((x) & GENMASK(31, 16)) >> 16)
 
-#define SPI_CTAR(x)			(0x0c + (((x) & GENMASK(1, 0)) * 4))
+#define SPI_CTAR(x)			(0x0c + (((x) & GENMASK(2, 0)) * 4))
 #define SPI_CTAR_FMSZ(x)		(((x) << 27) & GENMASK(30, 27))
+#define SPI_CTAR_DBR			BIT(31)
 #define SPI_CTAR_CPOL			BIT(26)
 #define SPI_CTAR_CPHA			BIT(25)
 #define SPI_CTAR_LSBFE			BIT(24)
@@ -93,12 +95,14 @@
 #define SPI_TXFR1			0x40
 #define SPI_TXFR2			0x44
 #define SPI_TXFR3			0x48
+#define SPI_TXFR4			0x4C
 #define SPI_RXFR0			0x7c
 #define SPI_RXFR1			0x80
 #define SPI_RXFR2			0x84
 #define SPI_RXFR3			0x88
+#define SPI_RXFR4			0x8C
 
-#define SPI_CTARE(x)			(0x11c + (((x) & GENMASK(1, 0)) * 4))
+#define SPI_CTARE(x)			(0x11c + (((x) & GENMASK(2, 0)) * 4))
 #define SPI_CTARE_FMSZE(x)		(((x) & 0x1) << 16)
 #define SPI_CTARE_DTCP(x)		((x) & 0x7ff)
 
@@ -109,6 +113,8 @@
 
 #define DMA_COMPLETION_TIMEOUT		msecs_to_jiffies(3000)
 
+#define SPI_25MHZ			25000000
+
 struct chip_data {
 	u32			ctar_val;
 };
@@ -122,6 +128,7 @@ struct fsl_dspi_devtype_data {
 	enum dspi_trans_mode	trans_mode;
 	u8			max_clock_factor;
 	int			fifo_size;
+	const struct regmap_config *regmap;
 };
 
 enum {
@@ -135,6 +142,102 @@ enum {
 	LX2160A,
 	MCF5441X,
 	VF610,
+	S32G,
+	S32G_TARGET,
+};
+
+static const struct regmap_range dspi_yes_ranges[] = {
+	regmap_reg_range(SPI_MCR, SPI_MCR),
+	regmap_reg_range(SPI_TCR, SPI_CTAR(3)),
+	regmap_reg_range(SPI_SR, SPI_TXFR3),
+	regmap_reg_range(SPI_RXFR0, SPI_RXFR3),
+	regmap_reg_range(SPI_CTARE(0), SPI_CTARE(3)),
+	regmap_reg_range(SPI_SREX, SPI_SREX),
+};
+
+static const struct regmap_range s32g_dspi_yes_ranges[] = {
+	regmap_reg_range(SPI_MCR, SPI_MCR),
+	regmap_reg_range(SPI_TCR, SPI_CTAR(5)),
+	regmap_reg_range(SPI_SR, SPI_TXFR4),
+	regmap_reg_range(SPI_RXFR0, SPI_RXFR4),
+	regmap_reg_range(SPI_CTARE(0), SPI_CTARE(5)),
+	regmap_reg_range(SPI_SREX, SPI_SREX),
+};
+
+static const struct regmap_access_table dspi_access_table = {
+	.yes_ranges	= dspi_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(dspi_yes_ranges),
+};
+
+static const struct regmap_access_table s32g_dspi_access_table = {
+	.yes_ranges	= s32g_dspi_yes_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(s32g_dspi_yes_ranges),
+};
+
+static const struct regmap_range dspi_volatile_ranges[] = {
+	regmap_reg_range(SPI_MCR, SPI_TCR),
+	regmap_reg_range(SPI_SR, SPI_SR),
+	regmap_reg_range(SPI_PUSHR, SPI_RXFR4),
+	regmap_reg_range(SPI_SREX, SPI_SREX),
+};
+
+static const struct regmap_access_table dspi_volatile_table = {
+	.yes_ranges	= dspi_volatile_ranges,
+	.n_yes_ranges	= ARRAY_SIZE(dspi_volatile_ranges),
+};
+
+enum {
+	DSPI_REGMAP,
+	S32G_DSPI_REGMAP,
+	DSPI_XSPI_REGMAP,
+	S32G_DSPI_XSPI_REGMAP,
+	DSPI_PUSHR,
+};
+
+static const struct regmap_config dspi_regmap_config[] = {
+	[DSPI_REGMAP] = {
+		.reg_bits	= 32,
+		.val_bits	= 32,
+		.reg_stride	= 4,
+		.max_register	= SPI_RXFR3,
+		.volatile_table	= &dspi_volatile_table,
+		.rd_table	= &dspi_access_table,
+		.wr_table	= &dspi_access_table,
+	},
+	[S32G_DSPI_REGMAP] = {
+		.reg_bits	= 32,
+		.val_bits	= 32,
+		.reg_stride	= 4,
+		.max_register	= SPI_RXFR4,
+		.volatile_table	= &dspi_volatile_table,
+		.wr_table	= &s32g_dspi_access_table,
+		.rd_table	= &s32g_dspi_access_table,
+	},
+	[DSPI_XSPI_REGMAP] = {
+		.reg_bits	= 32,
+		.val_bits	= 32,
+		.reg_stride	= 4,
+		.max_register	= SPI_SREX,
+		.volatile_table	= &dspi_volatile_table,
+		.rd_table	= &dspi_access_table,
+		.wr_table	= &dspi_access_table,
+	},
+	[S32G_DSPI_XSPI_REGMAP] = {
+		.reg_bits	= 32,
+		.val_bits	= 32,
+		.reg_stride	= 4,
+		.max_register	= SPI_SREX,
+		.volatile_table	= &dspi_volatile_table,
+		.wr_table	= &s32g_dspi_access_table,
+		.rd_table	= &s32g_dspi_access_table,
+	},
+	[DSPI_PUSHR] = {
+		.name		= "pushr",
+		.reg_bits	= 16,
+		.val_bits	= 16,
+		.reg_stride	= 2,
+		.max_register	= 0x2,
+	},
 };
 
 static const struct fsl_dspi_devtype_data devtype_data[] = {
@@ -142,55 +245,77 @@ static const struct fsl_dspi_devtype_data devtype_data[] = {
 		.trans_mode		= DSPI_DMA_MODE,
 		.max_clock_factor	= 2,
 		.fifo_size		= 4,
+		.regmap			= &dspi_regmap_config[DSPI_REGMAP],
 	},
 	[LS1021A] = {
 		/* Has A-011218 DMA erratum */
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 4,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LS1012A] = {
 		/* Has A-011218 DMA erratum */
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 16,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LS1028A] = {
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 4,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LS1043A] = {
 		/* Has A-011218 DMA erratum */
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 16,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LS1046A] = {
 		/* Has A-011218 DMA erratum */
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 16,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LS2080A] = {
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 4,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LS2085A] = {
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 4,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[LX2160A] = {
 		.trans_mode		= DSPI_XSPI_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 4,
+		.regmap			= &dspi_regmap_config[DSPI_XSPI_REGMAP],
 	},
 	[MCF5441X] = {
 		.trans_mode		= DSPI_DMA_MODE,
 		.max_clock_factor	= 8,
 		.fifo_size		= 16,
+		.regmap			= &dspi_regmap_config[DSPI_REGMAP],
+	},
+	[S32G] = {
+		.trans_mode	  = DSPI_XSPI_MODE,
+		.max_clock_factor = 1,
+		.fifo_size	  = 5,
+		.regmap		  = &dspi_regmap_config[S32G_DSPI_XSPI_REGMAP],
+	},
+	[S32G_TARGET] = {
+		.trans_mode	  = DSPI_DMA_MODE,
+		.max_clock_factor = 1,
+		.fifo_size	  = 5,
+		.regmap		  = &dspi_regmap_config[S32G_DSPI_REGMAP],
 	},
 };
 
@@ -225,6 +350,7 @@ struct fsl_dspi {
 	const void				*tx;
 	void					*rx;
 	u16					tx_cmd;
+	bool					mtf_enabled;
 	const struct fsl_dspi_devtype_data	*devtype_data;
 
 	struct completion			xfer_done;
@@ -247,6 +373,12 @@ struct fsl_dspi {
 	void (*dev_to_host)(struct fsl_dspi *dspi, u32 rxdata);
 };
 
+static bool is_s32g_dspi(struct fsl_dspi *data)
+{
+	return data->devtype_data == &devtype_data[S32G] ||
+	       data->devtype_data == &devtype_data[S32G_TARGET];
+}
+
 static void dspi_native_host_to_dev(struct fsl_dspi *dspi, u32 *txdata)
 {
 	switch (dspi->oper_word_size) {
@@ -595,7 +727,7 @@ static void dspi_release_dma(struct fsl_dspi *dspi)
 }
 
 static void hz_to_spi_baud(char *pbr, char *br, int speed_hz,
-			   unsigned long clkrate)
+			   unsigned long clkrate, bool mtf_enabled)
 {
 	/* Valid baud rate pre-scaler values */
 	int pbr_tbl[4] = {2, 3, 5, 7};
@@ -612,7 +744,13 @@ static void hz_to_spi_baud(char *pbr, char *br, int speed_hz,
 
 	for (i = 0; i < ARRAY_SIZE(brs); i++)
 		for (j = 0; j < ARRAY_SIZE(pbr_tbl); j++) {
-			scale = brs[i] * pbr_tbl[j];
+			if (mtf_enabled) {
+				/* In MTF mode DBR=1 so frequency is doubled */
+				scale = (brs[i] * pbr_tbl[j]) / 2;
+			} else {
+				scale = brs[i] * pbr_tbl[j];
+			}
+
 			if (scale >= scale_needed) {
 				if (scale < minscale) {
 					minscale = scale;
@@ -746,8 +884,12 @@ static void dspi_setup_accel(struct fsl_dspi *dspi)
 	struct spi_transfer *xfer = dspi->cur_transfer;
 	bool odd = !!(dspi->len & 1);
 
-	/* No accel for frames not multiple of 8 bits at the moment */
-	if (xfer->bits_per_word % 8)
+	/*
+	 * No accel for DMA transfers or frames not multiples of 8 bits at the
+	 * moment.
+	 */
+	if (dspi->devtype_data->trans_mode == DSPI_DMA_MODE ||
+	    xfer->bits_per_word % 8)
 		goto no_accel;
 
 	if (!odd && dspi->len <= dspi->devtype_data->fifo_size * 2) {
@@ -756,10 +898,7 @@ static void dspi_setup_accel(struct fsl_dspi *dspi)
 		dspi->oper_bits_per_word = 8;
 	} else {
 		/* Start off with maximum supported by hardware */
-		if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
-			dspi->oper_bits_per_word = 32;
-		else
-			dspi->oper_bits_per_word = 16;
+		dspi->oper_bits_per_word = 32;
 
 		/*
 		 * And go down only if the buffer can't be sent with
@@ -1027,6 +1166,20 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
 	return status;
 }
 
+static int dspi_set_mtf(struct fsl_dspi *dspi)
+{
+	if (spi_controller_is_target(dspi->ctlr))
+		return 0;
+
+	if (dspi->mtf_enabled)
+		regmap_update_bits(dspi->regmap, SPI_MCR, SPI_MCR_MTFE,
+				   SPI_MCR_MTFE);
+	else
+		regmap_update_bits(dspi->regmap, SPI_MCR, SPI_MCR_MTFE, 0);
+
+	return 0;
+}
+
 static int dspi_setup(struct spi_device *spi)
 {
 	struct fsl_dspi *dspi = spi_controller_get_devdata(spi->controller);
@@ -1085,7 +1238,16 @@ static int dspi_setup(struct spi_device *spi)
 		cs_sck_delay, sck_cs_delay);
 
 	clkrate = clk_get_rate(dspi->clk);
-	hz_to_spi_baud(&pbr, &br, spi->max_speed_hz, clkrate);
+
+	if (is_s32g_dspi(dspi) && spi->max_speed_hz > SPI_25MHZ)
+		dspi->mtf_enabled = true;
+	else
+		dspi->mtf_enabled = false;
+
+	dspi_set_mtf(dspi);
+
+	hz_to_spi_baud(&pbr, &br, spi->max_speed_hz, clkrate,
+		       dspi->mtf_enabled);
 
 	/* Set PCS to SCK delay scale values */
 	ns_delay_scale(&pcssck, &cssck, cs_sck_delay, clkrate);
@@ -1107,6 +1269,9 @@ static int dspi_setup(struct spi_device *spi)
 				  SPI_CTAR_PBR(pbr) |
 				  SPI_CTAR_BR(br);
 
+		if (dspi->mtf_enabled)
+			chip->ctar_val |= SPI_CTAR_DBR;
+
 		if (spi->mode & SPI_LSB_FIRST)
 			chip->ctar_val |= SPI_CTAR_LSBFE;
 	}
@@ -1160,112 +1325,14 @@ static const struct of_device_id fsl_dspi_dt_ids[] = {
 	}, {
 		.compatible = "fsl,lx2160a-dspi",
 		.data = &devtype_data[LX2160A],
+	}, {
+		.compatible = "nxp,s32g2-dspi",
+		.data = &devtype_data[S32G],
 	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, fsl_dspi_dt_ids);
 
-#ifdef CONFIG_PM_SLEEP
-static int dspi_suspend(struct device *dev)
-{
-	struct fsl_dspi *dspi = dev_get_drvdata(dev);
-
-	if (dspi->irq)
-		disable_irq(dspi->irq);
-	spi_controller_suspend(dspi->ctlr);
-	clk_disable_unprepare(dspi->clk);
-
-	pinctrl_pm_select_sleep_state(dev);
-
-	return 0;
-}
-
-static int dspi_resume(struct device *dev)
-{
-	struct fsl_dspi *dspi = dev_get_drvdata(dev);
-	int ret;
-
-	pinctrl_pm_select_default_state(dev);
-
-	ret = clk_prepare_enable(dspi->clk);
-	if (ret)
-		return ret;
-	spi_controller_resume(dspi->ctlr);
-	if (dspi->irq)
-		enable_irq(dspi->irq);
-
-	return 0;
-}
-#endif /* CONFIG_PM_SLEEP */
-
-static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);
-
-static const struct regmap_range dspi_yes_ranges[] = {
-	regmap_reg_range(SPI_MCR, SPI_MCR),
-	regmap_reg_range(SPI_TCR, SPI_CTAR(3)),
-	regmap_reg_range(SPI_SR, SPI_TXFR3),
-	regmap_reg_range(SPI_RXFR0, SPI_RXFR3),
-	regmap_reg_range(SPI_CTARE(0), SPI_CTARE(3)),
-	regmap_reg_range(SPI_SREX, SPI_SREX),
-};
-
-static const struct regmap_access_table dspi_access_table = {
-	.yes_ranges	= dspi_yes_ranges,
-	.n_yes_ranges	= ARRAY_SIZE(dspi_yes_ranges),
-};
-
-static const struct regmap_range dspi_volatile_ranges[] = {
-	regmap_reg_range(SPI_MCR, SPI_TCR),
-	regmap_reg_range(SPI_SR, SPI_SR),
-	regmap_reg_range(SPI_PUSHR, SPI_RXFR3),
-};
-
-static const struct regmap_access_table dspi_volatile_table = {
-	.yes_ranges	= dspi_volatile_ranges,
-	.n_yes_ranges	= ARRAY_SIZE(dspi_volatile_ranges),
-};
-
-static const struct regmap_config dspi_regmap_config = {
-	.reg_bits	= 32,
-	.val_bits	= 32,
-	.reg_stride	= 4,
-	.max_register	= 0x88,
-	.volatile_table	= &dspi_volatile_table,
-	.rd_table	= &dspi_access_table,
-	.wr_table	= &dspi_access_table,
-};
-
-static const struct regmap_range dspi_xspi_volatile_ranges[] = {
-	regmap_reg_range(SPI_MCR, SPI_TCR),
-	regmap_reg_range(SPI_SR, SPI_SR),
-	regmap_reg_range(SPI_PUSHR, SPI_RXFR3),
-	regmap_reg_range(SPI_SREX, SPI_SREX),
-};
-
-static const struct regmap_access_table dspi_xspi_volatile_table = {
-	.yes_ranges	= dspi_xspi_volatile_ranges,
-	.n_yes_ranges	= ARRAY_SIZE(dspi_xspi_volatile_ranges),
-};
-
-static const struct regmap_config dspi_xspi_regmap_config[] = {
-	{
-		.reg_bits	= 32,
-		.val_bits	= 32,
-		.reg_stride	= 4,
-		.max_register	= 0x13c,
-		.volatile_table	= &dspi_xspi_volatile_table,
-		.rd_table	= &dspi_access_table,
-		.wr_table	= &dspi_access_table,
-	},
-	{
-		.name		= "pushr",
-		.reg_bits	= 16,
-		.val_bits	= 16,
-		.reg_stride	= 2,
-		.max_register	= 0x2,
-	},
-};
-
 static int dspi_init(struct fsl_dspi *dspi)
 {
 	unsigned int mcr;
@@ -1301,6 +1368,50 @@ static int dspi_init(struct fsl_dspi *dspi)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int dspi_suspend(struct device *dev)
+{
+	struct fsl_dspi *dspi = dev_get_drvdata(dev);
+
+	if (dspi->irq)
+		disable_irq(dspi->irq);
+	spi_controller_suspend(dspi->ctlr);
+	clk_disable_unprepare(dspi->clk);
+
+	pinctrl_pm_select_sleep_state(dev);
+
+	return 0;
+}
+
+static int dspi_resume(struct device *dev)
+{
+	struct fsl_dspi *dspi = dev_get_drvdata(dev);
+	int ret;
+
+	pinctrl_pm_select_default_state(dev);
+
+	ret = clk_prepare_enable(dspi->clk);
+	if (ret)
+		return ret;
+	spi_controller_resume(dspi->ctlr);
+
+	ret = dspi_init(dspi);
+	if (ret) {
+		dev_err(dev, "failed to initialize dspi during resume\n");
+		return ret;
+	}
+
+	dspi_set_mtf(dspi);
+
+	if (dspi->irq)
+		enable_irq(dspi->irq);
+
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);
+
 static int dspi_target_abort(struct spi_controller *host)
 {
 	struct fsl_dspi *dspi = spi_controller_get_devdata(host);
@@ -1325,7 +1436,6 @@ static int dspi_target_abort(struct spi_controller *host)
 static int dspi_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	const struct regmap_config *regmap_config;
 	struct fsl_dspi_platform_data *pdata;
 	struct spi_controller *ctlr;
 	int ret, cs_num, bus_num = -1;
@@ -1338,7 +1448,10 @@ static int dspi_probe(struct platform_device *pdev)
 	if (!dspi)
 		return -ENOMEM;
 
-	ctlr = spi_alloc_host(&pdev->dev, 0);
+	if (of_property_read_bool(np, "spi-slave"))
+		ctlr = spi_alloc_target(&pdev->dev, 0);
+	else
+		ctlr = spi_alloc_host(&pdev->dev, 0);
 	if (!ctlr)
 		return -ENOMEM;
 
@@ -1377,9 +1490,6 @@ static int dspi_probe(struct platform_device *pdev)
 		of_property_read_u32(np, "bus-num", &bus_num);
 		ctlr->bus_num = bus_num;
 
-		if (of_property_read_bool(np, "spi-slave"))
-			ctlr->target = true;
-
 		dspi->devtype_data = of_device_get_match_data(&pdev->dev);
 		if (!dspi->devtype_data) {
 			dev_err(&pdev->dev, "can't get devtype_data\n");
@@ -1397,6 +1507,9 @@ static int dspi_probe(struct platform_device *pdev)
 		dspi->pushr_tx = 0;
 	}
 
+	if (spi_controller_is_target(ctlr) && is_s32g_dspi(dspi))
+		dspi->devtype_data = &devtype_data[S32G_TARGET];
+
 	if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
 		ctlr->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 32);
 	else
@@ -1408,11 +1521,8 @@ static int dspi_probe(struct platform_device *pdev)
 		goto out_ctlr_put;
 	}
 
-	if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
-		regmap_config = &dspi_xspi_regmap_config[0];
-	else
-		regmap_config = &dspi_regmap_config;
-	dspi->regmap = devm_regmap_init_mmio(&pdev->dev, base, regmap_config);
+	dspi->regmap = devm_regmap_init_mmio(&pdev->dev, base,
+					     dspi->devtype_data->regmap);
 	if (IS_ERR(dspi->regmap)) {
 		dev_err(&pdev->dev, "failed to init regmap: %ld\n",
 				PTR_ERR(dspi->regmap));
@@ -1423,7 +1533,7 @@ static int dspi_probe(struct platform_device *pdev)
 	if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE) {
 		dspi->regmap_pushr = devm_regmap_init_mmio(
 			&pdev->dev, base + SPI_PUSHR,
-			&dspi_xspi_regmap_config[1]);
+			&dspi_regmap_config[DSPI_PUSHR]);
 		if (IS_ERR(dspi->regmap_pushr)) {
 			dev_err(&pdev->dev,
 				"failed to init pushr regmap: %ld\n",