media: staging: media: starfive: camss: Add capture driver

Add capture driver for StarFive Camera Subsystem. It contains two video
devices: capture_yuv and capture_raw.
Signed-off-by: Jack Zhu <jack.zhu@starfivetech.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/staging/media/starfive/camss/Makefile

@@ -5,6 +5,7 @@
 
 starfive-camss-objs += \
 		stf-camss.o \
+		stf-capture.o \
 		stf-isp.o \
 		stf-isp-hw-ops.o \
 		stf-video.o

drivers/staging/media/starfive/camss/stf-camss.h

@@ -19,6 +19,7 @@
 #include <media/v4l2-device.h>
 
 #include "stf-isp.h"
+#include "stf-capture.h"
 
 enum stf_port_num {
 	STF_PORT_DVP = 0,
@@ -52,6 +53,7 @@ struct stfcamss {
 	struct media_pipeline pipe;
 	struct device *dev;
 	struct stf_isp_dev isp_dev;
+	struct stf_capture captures[STF_CAPTURE_NUM];
 	struct v4l2_async_notifier notifier;
 	void __iomem *syscon_base;
 	void __iomem *isp_base;

drivers/staging/media/starfive/camss/stf-capture.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * stf_capture.h
+ *
+ * Starfive Camera Subsystem driver
+ *
+ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
+ */
+
+#ifndef STF_CAPTURE_H
+#define STF_CAPTURE_H
+
+#include "stf-video.h"
+
+#define VIN_CHANNEL_SEL_EN			0x14
+#define VIN_START_ADDR_N			0x18
+#define VIN_INRT_PIX_CFG			0x1c
+#define VIN_START_ADDR_O			0x20
+#define VIN_CFG_REG				0x24
+
+#define U0_VIN_CNFG_AXI_DVP_EN			BIT(2)
+
+#define U0_VIN_CHANNEL_SEL_MASK			GENMASK(3, 0)
+#define U0_VIN_AXIWR0_EN			BIT(4)
+#define CHANNEL(x)				((x) << 0)
+
+#define U0_VIN_INTR_CLEAN			BIT(0)
+#define U0_VIN_INTR_M				BIT(1)
+#define U0_VIN_PIX_CNT_END_MASK			GENMASK(12, 2)
+#define U0_VIN_PIX_CT_MASK			GENMASK(14, 13)
+#define U0_VIN_PIXEL_HEIGH_BIT_SEL_MAKS		GENMASK(16, 15)
+
+#define PIX_CNT_END(x)				((x) << 2)
+#define PIX_CT(x)				((x) << 13)
+#define PIXEL_HEIGH_BIT_SEL(x)			((x) << 15)
+
+#define U0_VIN_CNFG_DVP_HS_POS			BIT(1)
+#define U0_VIN_CNFG_DVP_SWAP_EN			BIT(2)
+#define U0_VIN_CNFG_DVP_VS_POS			BIT(3)
+#define U0_VIN_CNFG_GEN_EN_AXIRD		BIT(4)
+#define U0_VIN_CNFG_ISP_DVP_EN0			BIT(5)
+#define U0_VIN_MIPI_BYTE_EN_ISP0(n)		((n) << 6)
+#define U0_VIN_MIPI_CHANNEL_SEL0(n)		((n) << 8)
+#define U0_VIN_P_I_MIPI_HAEDER_EN0(n)		((n) << 12)
+#define U0_VIN_PIX_NUM(n)			((n) << 13)
+#define U0_VIN_MIPI_BYTE_EN_ISP0_MASK		GENMASK(7, 6)
+#define U0_VIN_MIPI_CHANNEL_SEL0_MASK		GENMASK(11, 8)
+#define U0_VIN_P_I_MIPI_HAEDER_EN0_MASK		BIT(12)
+#define U0_VIN_PIX_NUM_MASK			GENMASK(16, 13)
+
+enum stf_v_state {
+	STF_OUTPUT_OFF,
+	STF_OUTPUT_RESERVED,
+	STF_OUTPUT_SINGLE,
+	STF_OUTPUT_CONTINUOUS,
+	STF_OUTPUT_IDLE,
+	STF_OUTPUT_STOPPING
+};
+
+struct stf_v_buf {
+	int active_buf;
+	struct stfcamss_buffer *buf[2];
+	struct stfcamss_buffer *last_buffer;
+	struct list_head pending_bufs;
+	struct list_head ready_bufs;
+	enum stf_v_state state;
+	unsigned int sequence;
+	/* protects the above member variables */
+	spinlock_t lock;
+	atomic_t frame_skip;
+};
+
+struct stf_capture {
+	struct stfcamss_video video;
+	struct stf_v_buf buffers;
+	enum stf_capture_type type;
+};
+
+irqreturn_t stf_wr_irq_handler(int irq, void *priv);
+irqreturn_t stf_isp_irq_handler(int irq, void *priv);
+irqreturn_t stf_line_irq_handler(int irq, void *priv);
+int stf_capture_register(struct stfcamss *stfcamss,
+			 struct v4l2_device *v4l2_dev);
+void stf_capture_unregister(struct stfcamss *stfcamss);
+
+#endif