1 files changed, 131 insertions, 42 deletions

diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
index 7972e90..20cdee3 100644
--- a/drivers/spi/spi_imx.c
+++ b/drivers/spi/spi_imx.c
@@ -59,6 +59,24 @@ struct spi_imx_config {
 	int cs;
 };
 
+enum spi_imx_devtype {
+	SPI_IMX_VER_IMX1,
+	SPI_IMX_VER_0_0,
+	SPI_IMX_VER_0_4,
+	SPI_IMX_VER_0_5,
+	SPI_IMX_VER_0_7,
+	SPI_IMX_VER_AUTODETECT,
+};
+
+struct spi_imx_data;
+
+struct spi_imx_devtype_data {
+	void (*intctrl)(struct spi_imx_data *, int);
+	int (*config)(struct spi_imx_data *, struct spi_imx_config *);
+	void (*trigger)(struct spi_imx_data *);
+	int (*rx_available)(struct spi_imx_data *);
+};
+
 struct spi_imx_data {
 	struct spi_bitbang bitbang;
 
@@ -76,11 +94,7 @@ struct spi_imx_data {
 	const void *tx_buf;
 	unsigned int txfifo; /* number of words pushed in tx FIFO */
 
-	/* SoC specific functions */
-	void (*intctrl)(struct spi_imx_data *, int);
-	int (*config)(struct spi_imx_data *, struct spi_imx_config *);
-	void (*trigger)(struct spi_imx_data *);
-	int (*rx_available)(struct spi_imx_data *);
+	struct spi_imx_devtype_data devtype_data;
 };
 
 #define MXC_SPI_BUF_RX(type)						\
@@ -178,7 +192,7 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin,
  * the i.MX35 has a slightly different register layout for bits
  * we do not use here.
  */
-static void mx31_intctrl(struct spi_imx_data *spi_imx, int enable)
+static void __maybe_unused mx31_intctrl(struct spi_imx_data *spi_imx, int enable)
 {
 	unsigned int val = 0;
 
@@ -190,7 +204,7 @@ static void mx31_intctrl(struct spi_imx_data *spi_imx, int enable)
 	writel(val, spi_imx->base + MXC_CSPIINT);
 }
 
-static void mx31_trigger(struct spi_imx_data *spi_imx)
+static void __maybe_unused mx31_trigger(struct spi_imx_data *spi_imx)
 {
 	unsigned int reg;
 
@@ -199,7 +213,7 @@ static void mx31_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx31_config(struct spi_imx_data *spi_imx,
+static int __maybe_unused mx31_config(struct spi_imx_data *spi_imx,
 		struct spi_imx_config *config)
 {
 	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
@@ -232,7 +246,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx31_rx_available(struct spi_imx_data *spi_imx)
+static int __maybe_unused mx31_rx_available(struct spi_imx_data *spi_imx)
 {
 	return readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR;
 }
@@ -250,7 +264,7 @@ static int mx31_rx_available(struct spi_imx_data *spi_imx)
 #define MX27_CSPICTRL_DR_SHIFT	14
 #define MX27_CSPICTRL_CS_SHIFT	19
 
-static void mx27_intctrl(struct spi_imx_data *spi_imx, int enable)
+static void __maybe_unused mx27_intctrl(struct spi_imx_data *spi_imx, int enable)
 {
 	unsigned int val = 0;
 
@@ -262,7 +276,7 @@ static void mx27_intctrl(struct spi_imx_data *spi_imx, int enable)
 	writel(val, spi_imx->base + MXC_CSPIINT);
 }
 
-static void mx27_trigger(struct spi_imx_data *spi_imx)
+static void __maybe_unused mx27_trigger(struct spi_imx_data *spi_imx)
 {
 	unsigned int reg;
 
@@ -271,7 +285,7 @@ static void mx27_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx27_config(struct spi_imx_data *spi_imx,
+static int __maybe_unused mx27_config(struct spi_imx_data *spi_imx,
 		struct spi_imx_config *config)
 {
 	unsigned int reg = MX27_CSPICTRL_ENABLE | MX27_CSPICTRL_MASTER;
@@ -294,7 +308,7 @@ static int mx27_config(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx27_rx_available(struct spi_imx_data *spi_imx)
+static int __maybe_unused mx27_rx_available(struct spi_imx_data *spi_imx)
 {
 	return readl(spi_imx->base + MXC_CSPIINT) & MX27_INTREG_RR;
 }
@@ -310,7 +324,7 @@ static int mx27_rx_available(struct spi_imx_data *spi_imx)
 #define MX1_CSPICTRL_MASTER	(1 << 10)
 #define MX1_CSPICTRL_DR_SHIFT	13
 
-static void mx1_intctrl(struct spi_imx_data *spi_imx, int enable)
+static void __maybe_unused mx1_intctrl(struct spi_imx_data *spi_imx, int enable)
 {
 	unsigned int val = 0;
 
@@ -322,7 +336,7 @@ static void mx1_intctrl(struct spi_imx_data *spi_imx, int enable)
 	writel(val, spi_imx->base + MXC_CSPIINT);
 }
 
-static void mx1_trigger(struct spi_imx_data *spi_imx)
+static void __maybe_unused mx1_trigger(struct spi_imx_data *spi_imx)
 {
 	unsigned int reg;
 
@@ -331,7 +345,7 @@ static void mx1_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx1_config(struct spi_imx_data *spi_imx,
+static int __maybe_unused mx1_config(struct spi_imx_data *spi_imx,
 		struct spi_imx_config *config)
 {
 	unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
@@ -350,11 +364,50 @@ static int mx1_config(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx1_rx_available(struct spi_imx_data *spi_imx)
+static int __maybe_unused mx1_rx_available(struct spi_imx_data *spi_imx)
 {
 	return readl(spi_imx->base + MXC_CSPIINT) & MX1_INTREG_RR;
 }
 
+/*
+ * These version numbers are taken from the Freescale driver.  Unfortunately it
+ * doesn't support i.MX1, so this entry doesn't match the scheme. :-(
+ */
+static struct spi_imx_devtype_data spi_imx_devtype_data[] __devinitdata = {
+#ifdef CONFIG_SPI_IMX_VER_IMX1
+	[SPI_IMX_VER_IMX1] = {
+		.intctrl = mx1_intctrl,
+		.config = mx1_config,
+		.trigger = mx1_trigger,
+		.rx_available = mx1_rx_available,
+	},
+#endif
+#ifdef CONFIG_SPI_IMX_VER_0_0
+	[SPI_IMX_VER_0_0] = {
+		.intctrl = mx27_intctrl,
+		.config = mx27_config,
+		.trigger = mx27_trigger,
+		.rx_available = mx27_rx_available,
+	},
+#endif
+#ifdef CONFIG_SPI_IMX_VER_0_4
+	[SPI_IMX_VER_0_4] = {
+		.intctrl = mx31_intctrl,
+		.config = mx31_config,
+		.trigger = mx31_trigger,
+		.rx_available = mx31_rx_available,
+	},
+#endif
+#ifdef CONFIG_SPI_IMX_VER_0_7
+	[SPI_IMX_VER_0_7] = {
+		.intctrl = mx31_intctrl,
+		.config = mx31_config,
+		.trigger = mx31_trigger,
+		.rx_available = mx31_rx_available,
+	},
+#endif
+};
+
 static void spi_imx_chipselect(struct spi_device *spi, int is_active)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
@@ -377,14 +430,14 @@ static void spi_imx_push(struct spi_imx_data *spi_imx)
 		spi_imx->txfifo++;
 	}
 
-	spi_imx->trigger(spi_imx);
+	spi_imx->devtype_data.trigger(spi_imx);
 }
 
 static irqreturn_t spi_imx_isr(int irq, void *dev_id)
 {
 	struct spi_imx_data *spi_imx = dev_id;
 
-	while (spi_imx->rx_available(spi_imx)) {
+	while (spi_imx->devtype_data.rx_available(spi_imx)) {
 		spi_imx->rx(spi_imx);
 		spi_imx->txfifo--;
 	}
@@ -398,11 +451,12 @@ static irqreturn_t spi_imx_isr(int irq, void *dev_id)
 		/* No data left to push, but still waiting for rx data,
 		 * enable receive data available interrupt.
 		 */
-		spi_imx->intctrl(spi_imx, MXC_INT_RR);
+		spi_imx->devtype_data.intctrl(
+				spi_imx, MXC_INT_RR);
 		return IRQ_HANDLED;
 	}
 
-	spi_imx->intctrl(spi_imx, 0);
+	spi_imx->devtype_data.intctrl(spi_imx, 0);
 	complete(&spi_imx->xfer_done);
 
 	return IRQ_HANDLED;
@@ -439,7 +493,7 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	} else
 		BUG();
 
-	spi_imx->config(spi_imx, &config);
+	spi_imx->devtype_data.config(spi_imx, &config);
 
 	return 0;
 }
@@ -458,7 +512,7 @@ static int spi_imx_transfer(struct spi_device *spi,
 
 	spi_imx_push(spi_imx);
 
-	spi_imx->intctrl(spi_imx, MXC_INT_TE);
+	spi_imx->devtype_data.intctrl(spi_imx, MXC_INT_TE);
 
 	wait_for_completion(&spi_imx->xfer_done);
 
@@ -485,6 +539,33 @@ static void spi_imx_cleanup(struct spi_device *spi)
 {
 }
 
+static struct platform_device_id spi_imx_devtype[] = {
+	{
+		.name = DRIVER_NAME,
+		.driver_data = SPI_IMX_VER_AUTODETECT,
+	}, {
+		.name = "imx1-cspi",
+		.driver_data = SPI_IMX_VER_IMX1,
+	}, {
+		.name = "imx21-cspi",
+		.driver_data = SPI_IMX_VER_0_0,
+	}, {
+		.name = "imx25-cspi",
+		.driver_data = SPI_IMX_VER_0_7,
+	}, {
+		.name = "imx27-cspi",
+		.driver_data = SPI_IMX_VER_0_0,
+	}, {
+		.name = "imx31-cspi",
+		.driver_data = SPI_IMX_VER_0_4,
+	}, {
+		.name = "imx35-cspi",
+		.driver_data = SPI_IMX_VER_0_7,
+	}, {
+		/* sentinel */
+	}
+};
+
 static int __devinit spi_imx_probe(struct platform_device *pdev)
 {
 	struct spi_imx_master *mxc_platform_info;
@@ -536,6 +617,31 @@ static int __devinit spi_imx_probe(struct platform_device *pdev)
 
 	init_completion(&spi_imx->xfer_done);
 
+	if (pdev->id_entry->driver_data == SPI_IMX_VER_AUTODETECT) {
+		if (cpu_is_mx25() || cpu_is_mx35())
+			spi_imx->devtype_data =
+				spi_imx_devtype_data[SPI_IMX_VER_0_7];
+		else if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35())
+			spi_imx->devtype_data =
+				spi_imx_devtype_data[SPI_IMX_VER_0_4];
+		else if (cpu_is_mx27() || cpu_is_mx21())
+			spi_imx->devtype_data =
+				spi_imx_devtype_data[SPI_IMX_VER_0_0];
+		else if (cpu_is_mx1())
+			spi_imx->devtype_data =
+				spi_imx_devtype_data[SPI_IMX_VER_IMX1];
+		else
+			BUG();
+	} else
+		spi_imx->devtype_data =
+			spi_imx_devtype_data[pdev->id_entry->driver_data];
+
+	if (!spi_imx->devtype_data.intctrl) {
+		dev_err(&pdev->dev, "no support for this device compiled in\n");
+		ret = -ENODEV;
+		goto out_gpio_free;
+	}
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev, "can't get platform resource\n");
@@ -567,24 +673,6 @@ static int __devinit spi_imx_probe(struct platform_device *pdev)
 		goto out_iounmap;
 	}
 
-	if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35()) {
-		spi_imx->intctrl = mx31_intctrl;
-		spi_imx->config = mx31_config;
-		spi_imx->trigger = mx31_trigger;
-		spi_imx->rx_available = mx31_rx_available;
-	} else  if (cpu_is_mx27() || cpu_is_mx21()) {
-		spi_imx->intctrl = mx27_intctrl;
-		spi_imx->config = mx27_config;
-		spi_imx->trigger = mx27_trigger;
-		spi_imx->rx_available = mx27_rx_available;
-	} else if (cpu_is_mx1()) {
-		spi_imx->intctrl = mx1_intctrl;
-		spi_imx->config = mx1_config;
-		spi_imx->trigger = mx1_trigger;
-		spi_imx->rx_available = mx1_rx_available;
-	} else
-		BUG();
-
 	spi_imx->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(spi_imx->clk)) {
 		dev_err(&pdev->dev, "unable to get clock\n");
@@ -603,7 +691,7 @@ static int __devinit spi_imx_probe(struct platform_device *pdev)
 		while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR)
 			readl(spi_imx->base + MXC_CSPIRXDATA);
 
-	spi_imx->intctrl(spi_imx, 0);
+	spi_imx->devtype_data.intctrl(spi_imx, 0);
 
 	ret = spi_bitbang_start(&spi_imx->bitbang);
 	if (ret) {
@@ -668,6 +756,7 @@ static struct platform_driver spi_imx_driver = {
 		   .name = DRIVER_NAME,
 		   .owner = THIS_MODULE,
 		   },
+	.id_table = spi_imx_devtype,
 	.probe = spi_imx_probe,
 	.remove = __devexit_p(spi_imx_remove),
 };