gpu: ipu-v3: Add Camera Sensor Interface unit

Adds the Camera Sensor Interface (CSI) unit required for video capture.
Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>

Removed the unused clk_get_rate in ipu_csi_init_interface and the
ipu_csi_ccir_err_detection_enable/disable functions.
Checkpatch cleanup.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/gpu/ipu-v3/Makefile

 obj-$(CONFIG_IMX_IPUV3_CORE) += imx-ipu-v3.o
 
-imx-ipu-v3-objs := ipu-common.o ipu-cpmem.o ipu-dc.o ipu-di.o \
+imx-ipu-v3-objs := ipu-common.o ipu-cpmem.o ipu-csi.o ipu-dc.o ipu-di.o \
 		ipu-dp.o ipu-dmfc.o ipu-smfc.o

drivers/gpu/ipu-v3/ipu-common.c

@@ -217,18 +217,6 @@ int ipu_module_disable(struct ipu_soc *ipu, u32 mask)
 }
 EXPORT_SYMBOL_GPL(ipu_module_disable);
 
-int ipu_csi_enable(struct ipu_soc *ipu, int csi)
-{
-	return ipu_module_enable(ipu, csi ? IPU_CONF_CSI1_EN : IPU_CONF_CSI0_EN);
-}
-EXPORT_SYMBOL_GPL(ipu_csi_enable);
-
-int ipu_csi_disable(struct ipu_soc *ipu, int csi)
-{
-	return ipu_module_disable(ipu, csi ? IPU_CONF_CSI1_EN : IPU_CONF_CSI0_EN);
-}
-EXPORT_SYMBOL_GPL(ipu_csi_disable);
-
 int ipu_smfc_enable(struct ipu_soc *ipu)
 {
 	return ipu_module_enable(ipu, IPU_CONF_SMFC_EN);
@@ -439,6 +427,8 @@ struct ipu_devtype {
 	unsigned long cpmem_ofs;
 	unsigned long srm_ofs;
 	unsigned long tpm_ofs;
+	unsigned long csi0_ofs;
+	unsigned long csi1_ofs;
 	unsigned long disp0_ofs;
 	unsigned long disp1_ofs;
 	unsigned long dc_tmpl_ofs;
@@ -452,6 +442,8 @@ static struct ipu_devtype ipu_type_imx51 = {
 	.cpmem_ofs = 0x1f000000,
 	.srm_ofs = 0x1f040000,
 	.tpm_ofs = 0x1f060000,
+	.csi0_ofs = 0x1f030000,
+	.csi1_ofs = 0x1f038000,
 	.disp0_ofs = 0x1e040000,
 	.disp1_ofs = 0x1e048000,
 	.dc_tmpl_ofs = 0x1f080000,
@@ -465,6 +457,8 @@ static struct ipu_devtype ipu_type_imx53 = {
 	.cpmem_ofs = 0x07000000,
 	.srm_ofs = 0x07040000,
 	.tpm_ofs = 0x07060000,
+	.csi0_ofs = 0x07030000,
+	.csi1_ofs = 0x07038000,
 	.disp0_ofs = 0x06040000,
 	.disp1_ofs = 0x06048000,
 	.dc_tmpl_ofs = 0x07080000,
@@ -478,6 +472,8 @@ static struct ipu_devtype ipu_type_imx6q = {
 	.cpmem_ofs = 0x00300000,
 	.srm_ofs = 0x00340000,
 	.tpm_ofs = 0x00360000,
+	.csi0_ofs = 0x00230000,
+	.csi1_ofs = 0x00238000,
 	.disp0_ofs = 0x00240000,
 	.disp1_ofs = 0x00248000,
 	.dc_tmpl_ofs = 0x00380000,
@@ -508,6 +504,20 @@ static int ipu_submodules_init(struct ipu_soc *ipu,
 		goto err_cpmem;
 	}
 
+	ret = ipu_csi_init(ipu, dev, 0, ipu_base + devtype->csi0_ofs,
+			   IPU_CONF_CSI0_EN, ipu_clk);
+	if (ret) {
+		unit = "csi0";
+		goto err_csi_0;
+	}
+
+	ret = ipu_csi_init(ipu, dev, 1, ipu_base + devtype->csi1_ofs,
+			   IPU_CONF_CSI1_EN, ipu_clk);
+	if (ret) {
+		unit = "csi1";
+		goto err_csi_1;
+	}
+
 	ret = ipu_di_init(ipu, dev, 0, ipu_base + devtype->disp0_ofs,
 			IPU_CONF_DI0_EN, ipu_clk);
 	if (ret) {
@@ -562,6 +572,10 @@ static int ipu_submodules_init(struct ipu_soc *ipu,
 err_di_1:
 	ipu_di_exit(ipu, 0);
 err_di_0:
+	ipu_csi_exit(ipu, 1);
+err_csi_1:
+	ipu_csi_exit(ipu, 0);
+err_csi_0:
 	ipu_cpmem_exit(ipu);
 err_cpmem:
 	dev_err(&pdev->dev, "init %s failed with %d\n", unit, ret);
@@ -640,6 +654,8 @@ static void ipu_submodules_exit(struct ipu_soc *ipu)
 	ipu_dc_exit(ipu);
 	ipu_di_exit(ipu, 1);
 	ipu_di_exit(ipu, 0);
+	ipu_csi_exit(ipu, 1);
+	ipu_csi_exit(ipu, 0);
 	ipu_cpmem_exit(ipu);
 }
 
@@ -859,6 +875,10 @@ static int ipu_probe(struct platform_device *pdev)
 			ipu_base + devtype->cm_ofs + IPU_CM_IDMAC_REG_OFS);
 	dev_dbg(&pdev->dev, "cpmem:    0x%08lx\n",
 			ipu_base + devtype->cpmem_ofs);
+	dev_dbg(&pdev->dev, "csi0:    0x%08lx\n",
+			ipu_base + devtype->csi0_ofs);
+	dev_dbg(&pdev->dev, "csi1:    0x%08lx\n",
+			ipu_base + devtype->csi1_ofs);
 	dev_dbg(&pdev->dev, "disp0:    0x%08lx\n",
 			ipu_base + devtype->disp0_ofs);
 	dev_dbg(&pdev->dev, "disp1:    0x%08lx\n",

drivers/gpu/ipu-v3/ipu-prv.h

@@ -157,6 +157,7 @@ struct ipuv3_channel {
 };
 
 struct ipu_cpmem;
+struct ipu_csi;
 struct ipu_dc_priv;
 struct ipu_dmfc_priv;
 struct ipu_di;
@@ -189,6 +190,7 @@ struct ipu_soc {
 	struct ipu_dp_priv	*dp_priv;
 	struct ipu_dmfc_priv	*dmfc_priv;
 	struct ipu_di		*di_priv[2];
+	struct ipu_csi		*csi_priv[2];
 	struct ipu_smfc_priv	*smfc_priv;
 };
 
@@ -211,6 +213,10 @@ int ipu_module_disable(struct ipu_soc *ipu, u32 mask);
 bool ipu_idmac_channel_busy(struct ipu_soc *ipu, unsigned int chno);
 int ipu_wait_interrupt(struct ipu_soc *ipu, int irq, int ms);
 
+int ipu_csi_init(struct ipu_soc *ipu, struct device *dev, int id,
+		 unsigned long base, u32 module, struct clk *clk_ipu);
+void ipu_csi_exit(struct ipu_soc *ipu, int id);
+
 int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
 		unsigned long base, u32 module, struct clk *ipu_clk);
 void ipu_di_exit(struct ipu_soc *ipu, int id);

include/video/imx-ipu-v3.h

@@ -16,6 +16,7 @@
 #include <linux/videodev2.h>
 #include <linux/bitmap.h>
 #include <linux/fb.h>
+#include <media/v4l2-mediabus.h>
 
 struct ipu_soc;
 
@@ -61,6 +62,15 @@ struct ipu_di_signal_cfg {
 	u8 vsync_pin;
 };
 
+/*
+ * Enumeration of CSI destinations
+ */
+enum ipu_csi_dest {
+	IPU_CSI_DEST_IDMAC, /* to memory via SMFC */
+	IPU_CSI_DEST_IC,	/* to Image Converter */
+	IPU_CSI_DEST_VDIC,  /* to VDIC */
+};
+
 enum ipu_color_space {
 	IPUV3_COLORSPACE_RGB,
 	IPUV3_COLORSPACE_YUV,
@@ -211,8 +221,26 @@ int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable, u8 alpha,
 /*
  * IPU CMOS Sensor Interface (csi) functions
  */
-int ipu_csi_enable(struct ipu_soc *ipu, int csi);
-int ipu_csi_disable(struct ipu_soc *ipu, int csi);
+struct ipu_csi;
+int ipu_csi_init_interface(struct ipu_csi *csi,
+			   struct v4l2_mbus_config *mbus_cfg,
+			   struct v4l2_mbus_framefmt *mbus_fmt);
+bool ipu_csi_is_interlaced(struct ipu_csi *csi);
+void ipu_csi_get_window(struct ipu_csi *csi, struct v4l2_rect *w);
+void ipu_csi_set_window(struct ipu_csi *csi, struct v4l2_rect *w);
+void ipu_csi_set_test_generator(struct ipu_csi *csi, bool active,
+				u32 r_value, u32 g_value, u32 b_value,
+				u32 pix_clk);
+int ipu_csi_set_mipi_datatype(struct ipu_csi *csi, u32 vc,
+			      struct v4l2_mbus_framefmt *mbus_fmt);
+int ipu_csi_set_skip_smfc(struct ipu_csi *csi, u32 skip,
+			  u32 max_ratio, u32 id);
+int ipu_csi_set_dest(struct ipu_csi *csi, enum ipu_csi_dest csi_dest);
+int ipu_csi_enable(struct ipu_csi *csi);
+int ipu_csi_disable(struct ipu_csi *csi);
+struct ipu_csi *ipu_csi_get(struct ipu_soc *ipu, int id);
+void ipu_csi_put(struct ipu_csi *csi);
+void ipu_csi_dump(struct ipu_csi *csi);
 
 /*
  * IPU Sensor Multiple FIFO Controller (SMFC) functions