@@ -10,6 +10,16 @@ config VIDEO_XILINX
if VIDEO_XILINX
+config VIDEO_XILINX_CSI2RXSS
+ tristate "Xilinx CSI2 Rx Subsystem"
+ help
+ Driver for Xilinx MIPI CSI2 Rx Subsystem. This is a V4L sub-device
+ based driver that takes input from CSI2 Tx source and converts
+ it into an AXI4-Stream. The subsystem comprises of a CSI2 Rx
+ controller, DPHY, an optional I2C controller and a Video Format
+ Bridge. The driver is used to set the number of active lanes and
+ get short packet data.
+
config VIDEO_XILINX_TPG
tristate "Xilinx Video Test Pattern Generator"
depends on VIDEO_XILINX
@@ -3,5 +3,6 @@
xilinx-video-objs += xilinx-dma.o xilinx-vip.o xilinx-vipp.o
obj-$(CONFIG_VIDEO_XILINX) += xilinx-video.o
+obj-$(CONFIG_VIDEO_XILINX_CSI2RXSS) += xilinx-csi2rxss.o
obj-$(CONFIG_VIDEO_XILINX_TPG) += xilinx-tpg.o
obj-$(CONFIG_VIDEO_XILINX_VTC) += xilinx-vtc.o
new file mode 100644
@@ -0,0 +1,1234 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Xilinx MIPI CSI2 Rx Subsystem
+ *
+ * Copyright (C) 2016 - 2020 Xilinx, Inc.
+ *
+ * Contacts: Vishal Sagar <vishal.sagar@xilinx.com>
+ *
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/v4l2-subdev.h>
+#include <media/media-entity.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+#include "xilinx-vip.h"
+
+/* Register register map */
+#define XCSI_CCR_OFFSET 0x00
+#define XCSI_CCR_SOFTRESET BIT(1)
+#define XCSI_CCR_ENABLE BIT(0)
+
+#define XCSI_PCR_OFFSET 0x04
+#define XCSI_PCR_MAXLANES_MASK GENMASK(4, 3)
+#define XCSI_PCR_ACTLANES_MASK GENMASK(1, 0)
+
+#define XCSI_CSR_OFFSET 0x10
+#define XCSI_CSR_PKTCNT GENMASK(31, 16)
+#define XCSI_CSR_SPFIFOFULL BIT(3)
+#define XCSI_CSR_SPFIFONE BIT(2)
+#define XCSI_CSR_SLBF BIT(1)
+#define XCSI_CSR_RIPCD BIT(0)
+
+#define XCSI_GIER_OFFSET 0x20
+#define XCSI_GIER_GIE BIT(0)
+
+#define XCSI_ISR_OFFSET 0x24
+#define XCSI_IER_OFFSET 0x28
+
+#define XCSI_ISR_FR BIT(31)
+#define XCSI_ISR_VCXFE BIT(30)
+#define XCSI_ISR_WCC BIT(22)
+#define XCSI_ISR_ILC BIT(21)
+#define XCSI_ISR_SPFIFOF BIT(20)
+#define XCSI_ISR_SPFIFONE BIT(19)
+#define XCSI_ISR_SLBF BIT(18)
+#define XCSI_ISR_STOP BIT(17)
+#define XCSI_ISR_SOTERR BIT(13)
+#define XCSI_ISR_SOTSYNCERR BIT(12)
+#define XCSI_ISR_ECC2BERR BIT(11)
+#define XCSI_ISR_ECC1BERR BIT(10)
+#define XCSI_ISR_CRCERR BIT(9)
+#define XCSI_ISR_DATAIDERR BIT(8)
+#define XCSI_ISR_VC3FSYNCERR BIT(7)
+#define XCSI_ISR_VC3FLVLERR BIT(6)
+#define XCSI_ISR_VC2FSYNCERR BIT(5)
+#define XCSI_ISR_VC2FLVLERR BIT(4)
+#define XCSI_ISR_VC1FSYNCERR BIT(3)
+#define XCSI_ISR_VC1FLVLERR BIT(2)
+#define XCSI_ISR_VC0FSYNCERR BIT(1)
+#define XCSI_ISR_VC0FLVLERR BIT(0)
+
+#define XCSI_INTR_PROT_MASK (XCSI_ISR_VC3FSYNCERR | XCSI_ISR_VC3FLVLERR |\
+ XCSI_ISR_VC2FSYNCERR | XCSI_ISR_VC2FLVLERR |\
+ XCSI_ISR_VC1FSYNCERR | XCSI_ISR_VC1FLVLERR |\
+ XCSI_ISR_VC0FSYNCERR | XCSI_ISR_VC0FLVLERR |\
+ XCSI_ISR_VCXFE)
+
+#define XCSI_INTR_PKTLVL_MASK (XCSI_ISR_ECC2BERR | XCSI_ISR_ECC1BERR |\
+ XCSI_ISR_CRCERR | XCSI_ISR_DATAIDERR)
+
+#define XCSI_INTR_DPHY_MASK (XCSI_ISR_SOTERR | XCSI_ISR_SOTSYNCERR)
+
+#define XCSI_INTR_SPKT_MASK (XCSI_ISR_SPFIFOF | XCSI_ISR_SPFIFONE)
+
+#define XCSI_INTR_ERR_MASK (XCSI_ISR_WCC | XCSI_ISR_ILC | XCSI_ISR_SLBF |\
+ XCSI_ISR_STOP)
+
+#define XCSI_INTR_FRAMERCVD_MASK (XCSI_ISR_FR)
+
+#define XCSI_ISR_ALLINTR_MASK (XCSI_INTR_PROT_MASK | XCSI_INTR_PKTLVL_MASK |\
+ XCSI_INTR_DPHY_MASK | XCSI_INTR_SPKT_MASK |\
+ XCSI_INTR_ERR_MASK | XCSI_INTR_FRAMERCVD_MASK)
+
+/*
+ * Removed VCXFE mask as it doesn't exist in IER
+ * Removed STOP state irq as this will keep driver in irq handler only
+ */
+#define XCSI_IER_INTR_MASK (XCSI_ISR_ALLINTR_MASK &\
+ ~(XCSI_ISR_STOP | XCSI_ISR_VCXFE))
+
+#define XCSI_SPKTR_OFFSET 0x30
+#define XCSI_SPKTR_DATA GENMASK(23, 8)
+#define XCSI_SPKTR_VC GENMASK(7, 6)
+#define XCSI_SPKTR_DT GENMASK(5, 0)
+
+#define XCSI_VCXR_OFFSET 0x34
+#define XCSI_VCXR_VCERR GENMASK(23, 0)
+#define XCSI_VCXR_VCSTART 4
+#define XCSI_VCXR_VCEND 15
+#define XCSI_VCXR_FSYNCERR BIT(1)
+#define XCSI_VCXR_FLVLERR BIT(0)
+
+#define XCSI_CLKINFR_OFFSET 0x3C
+#define XCSI_CLKINFR_STOP BIT(1)
+
+#define XCSI_DLXINFR_OFFSET 0x40
+#define XCSI_DLXINFR_STOP BIT(5)
+#define XCSI_DLXINFR_SOTERR BIT(1)
+#define XCSI_DLXINFR_SOTSYNCERR BIT(0)
+#define XCSI_MAXDL_COUNT 0x4
+
+#define XCSI_VCXINF1R_OFFSET 0x60
+#define XCSI_VCXINF1R_LINECOUNT GENMASK(31, 16)
+#define XCSI_VCXINF1R_LINECOUNT_SHIFT 16
+#define XCSI_VCXINF1R_BYTECOUNT GENMASK(15, 0)
+
+#define XCSI_VCXINF2R_OFFSET 0x64
+#define XCSI_VCXINF2R_DT GENMASK(5, 0)
+#define XCSI_MAXVCX_COUNT 16
+
+/*
+ * The core takes less than 100 video clock cycles to reset.
+ * So choosing a timeout value larger than this.
+ */
+#define XCSI_TIMEOUT_VAL 1000 /* us */
+
+/*
+ * Sink pad connected to sensor source pad.
+ * Source pad connected to next module like demosaic.
+ */
+#define XCSI_MEDIA_PADS 2
+#define XCSI_DEFAULT_WIDTH 1920
+#define XCSI_DEFAULT_HEIGHT 1080
+
+/* Max media bus formats supported for enumeration */
+#define XCSI_MAX_MBUS_FMTS 16
+
+/* Max string length for CSI Data type string */
+#define XCSI_PXLFMT_STRLEN_MAX 16
+
+/* MIPI CSI2 Data Types from spec */
+#define XCSI_DT_YUV4228B 0x1E
+#define XCSI_DT_YUV42210B 0x1F
+#define XCSI_DT_RGB444 0x20
+#define XCSI_DT_RGB555 0x21
+#define XCSI_DT_RGB565 0x22
+#define XCSI_DT_RGB666 0x23
+#define XCSI_DT_RGB888 0x24
+#define XCSI_DT_RAW6 0x28
+#define XCSI_DT_RAW7 0x29
+#define XCSI_DT_RAW8 0x2A
+#define XCSI_DT_RAW10 0x2B
+#define XCSI_DT_RAW12 0x2C
+#define XCSI_DT_RAW14 0x2D
+#define XCSI_DT_RAW16 0x2E
+#define XCSI_DT_RAW20 0x2F
+
+#define XCSI_VCX_START 4
+#define XCSI_MAX_VC 4
+#define XCSI_MAX_VCX 16
+
+#define XCSI_NEXTREG_OFFSET 4
+
+/* There are 2 events frame sync and frame level error per VC */
+#define XCSI_VCX_NUM_EVENTS ((XCSI_MAX_VCX - XCSI_MAX_VC) * 2)
+
+/* Macro to return "true" or "false" string if bit is set */
+#define XCSI_GET_BITSET_STR(val, mask) (val) & (mask) ? "true" : "false"
+
+#define XADD_MBUS(state, mbus_fmt) \
+ do { \
+ if ((state)->mbus_fmts_count < XCSI_MAX_MBUS_FMTS) { \
+ (state)->mbus_fmts[(state)->mbus_fmts_count++] =\
+ (mbus_fmt); \
+ } else { \
+ dev_err((state)->core.dev, \
+ "accessing array out of bounds!\n"); \
+ } \
+ } while (0)
+
+/**
+ * struct xcsi2rxss_event - Event log structure
+ * @mask: Event mask
+ * @name: Name of the event
+ */
+struct xcsi2rxss_event {
+ u32 mask;
+ const char *name;
+};
+
+static const struct xcsi2rxss_event xcsi2rxss_events[] = {
+ { XCSI_ISR_FR, "Frame Received" },
+ { XCSI_ISR_VCXFE, "VCX Frame Errors" },
+ { XCSI_ISR_WCC, "Word Count Errors" },
+ { XCSI_ISR_ILC, "Invalid Lane Count Error" },
+ { XCSI_ISR_SPFIFOF, "Short Packet FIFO OverFlow Error" },
+ { XCSI_ISR_SPFIFONE, "Short Packet FIFO Not Empty" },
+ { XCSI_ISR_SLBF, "Streamline Buffer Full Error" },
+ { XCSI_ISR_STOP, "Lane Stop State" },
+ { XCSI_ISR_SOTERR, "SOT Error" },
+ { XCSI_ISR_SOTSYNCERR, "SOT Sync Error" },
+ { XCSI_ISR_ECC2BERR, "2 Bit ECC Unrecoverable Error" },
+ { XCSI_ISR_ECC1BERR, "1 Bit ECC Recoverable Error" },
+ { XCSI_ISR_CRCERR, "CRC Error" },
+ { XCSI_ISR_DATAIDERR, "Data Id Error" },
+ { XCSI_ISR_VC3FSYNCERR, "Virtual Channel 3 Frame Sync Error" },
+ { XCSI_ISR_VC3FLVLERR, "Virtual Channel 3 Frame Level Error" },
+ { XCSI_ISR_VC2FSYNCERR, "Virtual Channel 2 Frame Sync Error" },
+ { XCSI_ISR_VC2FLVLERR, "Virtual Channel 2 Frame Level Error" },
+ { XCSI_ISR_VC1FSYNCERR, "Virtual Channel 1 Frame Sync Error" },
+ { XCSI_ISR_VC1FLVLERR, "Virtual Channel 1 Frame Level Error" },
+ { XCSI_ISR_VC0FSYNCERR, "Virtual Channel 0 Frame Sync Error" },
+ { XCSI_ISR_VC0FLVLERR, "Virtual Channel 0 Frame Level Error" }
+};
+
+#define XCSI_NUM_EVENTS ARRAY_SIZE(xcsi2rxss_events)
+
+/*
+ * struct xcsi2rxss_core - Core configuration CSI2 Rx Subsystem device structure
+ * @dev: Platform structure
+ * @iomem: Base address of subsystem
+ * @enable_active_lanes: If number of active lanes can be modified
+ * @max_num_lanes: Maximum number of lanes present
+ * @datatype: Data type filter
+ * @events: counter for events
+ * @vcx_events: counter for vcx_events
+ * @en_vcx: If more than 4 VC are enabled
+ * @clks: array of clocks
+ * @rst_gpio: reset to video_aresetn
+ */
+struct xcsi2rxss_core {
+ struct device *dev;
+ void __iomem *iomem;
+ bool enable_active_lanes;
+ u32 max_num_lanes;
+ u32 datatype;
+ u32 events[XCSI_NUM_EVENTS];
+ u32 vcx_events[XCSI_VCX_NUM_EVENTS];
+ bool en_vcx;
+ struct clk_bulk_data *clks;
+ struct gpio_desc *rst_gpio;
+};
+
+/**
+ * struct xcsi2rxss_state - CSI2 Rx Subsystem device structure
+ * @core: Core structure for MIPI CSI2 Rx Subsystem
+ * @subdev: The v4l2 subdev structure
+ * @format: Active V4L2 formats on each pad
+ * @default_format: Default V4L2 format
+ * @lock: mutex for accessing this structure
+ * @pads: media pads
+ * @mbus_fmts: List of media bus formats for enum_mbus_code
+ * @mbus_fmts_count: Number of media bus formats
+ * @streaming: Flag for storing streaming state
+ *
+ * This structure contains the device driver related parameters
+ */
+struct xcsi2rxss_state {
+ struct xcsi2rxss_core core;
+ struct v4l2_subdev subdev;
+ struct v4l2_mbus_framefmt format;
+ struct v4l2_mbus_framefmt default_format;
+ /* used to protect access to this struct */
+ struct mutex lock;
+ struct media_pad pads[XCSI_MEDIA_PADS];
+ u32 mbus_fmts[XCSI_MAX_MBUS_FMTS];
+ u32 mbus_fmts_count;
+ bool streaming;
+};
+
+static const struct clk_bulk_data xcsi2rxss_clks[] = {
+ { .id = "lite_aclk" },
+ { .id = "video_aclk" },
+};
+
+static inline struct xcsi2rxss_state *
+to_xcsi2rxssstate(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct xcsi2rxss_state, subdev);
+}
+
+/*
+ * Register related operations
+ */
+static inline u32 xcsi2rxss_read(struct xcsi2rxss_core *xcsi2rxss, u32 addr)
+{
+ return ioread32(xcsi2rxss->iomem + addr);
+}
+
+static inline void xcsi2rxss_write(struct xcsi2rxss_core *xcsi2rxss, u32 addr,
+ u32 value)
+{
+ iowrite32(value, xcsi2rxss->iomem + addr);
+}
+
+static inline void xcsi2rxss_clr(struct xcsi2rxss_core *xcsi2rxss, u32 addr,
+ u32 clr)
+{
+ xcsi2rxss_write(xcsi2rxss, addr,
+ xcsi2rxss_read(xcsi2rxss, addr) & ~clr);
+}
+
+static inline void xcsi2rxss_set(struct xcsi2rxss_core *xcsi2rxss, u32 addr,
+ u32 set)
+{
+ xcsi2rxss_write(xcsi2rxss, addr, xcsi2rxss_read(xcsi2rxss, addr) | set);
+}
+
+static void xcsi2rxss_enable(struct xcsi2rxss_core *core)
+{
+ xcsi2rxss_set(core, XCSI_CCR_OFFSET, XCSI_CCR_ENABLE);
+}
+
+static void xcsi2rxss_disable(struct xcsi2rxss_core *core)
+{
+ xcsi2rxss_clr(core, XCSI_CCR_OFFSET, XCSI_CCR_ENABLE);
+}
+
+static void xcsi2rxss_intr_enable(struct xcsi2rxss_core *core)
+{
+ xcsi2rxss_clr(core, XCSI_GIER_OFFSET, XCSI_GIER_GIE);
+ xcsi2rxss_write(core, XCSI_IER_OFFSET, XCSI_IER_INTR_MASK);
+ xcsi2rxss_set(core, XCSI_GIER_OFFSET, XCSI_GIER_GIE);
+}
+
+static void xcsi2rxss_intr_disable(struct xcsi2rxss_core *core)
+{
+ xcsi2rxss_clr(core, XCSI_IER_OFFSET, XCSI_IER_INTR_MASK);
+ xcsi2rxss_clr(core, XCSI_GIER_OFFSET, XCSI_GIER_GIE);
+}
+
+/**
+ * xcsi2rxss_reset - Does a soft reset of the MIPI CSI2 Rx Subsystem
+ * @core: Core Xilinx CSI2 Rx Subsystem structure pointer
+ *
+ * Core takes less than 100 video clock cycles to reset.
+ * So a larger timeout value is chosen for margin.
+ *
+ * Return: 0 - on success OR -ETIME if reset times out
+ */
+static int xcsi2rxss_reset(struct xcsi2rxss_core *core)
+{
+ u32 timeout = XCSI_TIMEOUT_VAL;
+
+ xcsi2rxss_set(core, XCSI_CCR_OFFSET, XCSI_CCR_SOFTRESET);
+
+ while (xcsi2rxss_read(core, XCSI_CSR_OFFSET) & XCSI_CSR_RIPCD) {
+ if (timeout == 0) {
+ dev_err(core->dev, "soft reset timed out!\n");
+ return -ETIME;
+ }
+
+ timeout--;
+ udelay(1);
+ }
+
+ xcsi2rxss_clr(core, XCSI_CCR_OFFSET, XCSI_CCR_SOFTRESET);
+ return 0;
+}
+
+static void xcsi2rxss_reset_event_counters(struct xcsi2rxss_state *state)
+{
+ unsigned int i;
+
+ for (i = 0; i < XCSI_NUM_EVENTS; i++)
+ state->core.events[i] = 0;
+
+ for (i = 0; i < XCSI_VCX_NUM_EVENTS; i++)
+ state->core.vcx_events[i] = 0;
+}
+
+/* Print event counters */
+static void xcsi2rxss_log_counters(struct xcsi2rxss_state *state)
+{
+ struct xcsi2rxss_core *core = &state->core;
+ unsigned int i;
+
+ for (i = 0; i < XCSI_NUM_EVENTS; i++) {
+ if (core->events[i] > 0) {
+ dev_info(core->dev, "%s events: %d\n",
+ xcsi2rxss_events[i].name,
+ core->events[i]);
+ }
+ }
+
+ if (core->en_vcx) {
+ for (i = 0; i < XCSI_VCX_NUM_EVENTS; i++) {
+ if (core->vcx_events[i] > 0) {
+ dev_info(core->dev,
+ "VC %d Frame %s err vcx events: %d\n",
+ (i / 2) + XCSI_VCX_START,
+ i & 1 ? "Sync" : "Level",
+ core->vcx_events[i]);
+ }
+ }
+ }
+}
+
+static void xcsi2rxss_log_ipconfig(struct xcsi2rxss_state *state)
+{
+ struct xcsi2rxss_core *core = &state->core;
+
+ dev_dbg(core->dev, "****** Xilinx MIPI CSI2 Rx SS IP Config ******\n");
+ dev_dbg(core->dev, "vcx is %s", core->en_vcx ? "enabled" : "disabled");
+ dev_dbg(core->dev, "Enable active lanes property is %s\n",
+ core->enable_active_lanes ? "present" : "absent");
+ dev_dbg(core->dev, "Max lanes = %d", core->max_num_lanes);
+ dev_dbg(core->dev, "Pixel format set as 0x%x\n", core->datatype);
+ dev_dbg(core->dev, "**********************************************\n");
+}
+
+/**
+ * xcsi2rxss_log_status - Logs the status of the CSI-2 Receiver
+ * @sd: Pointer to V4L2 subdevice structure
+ *
+ * This function prints the current status of Xilinx MIPI CSI-2
+ *
+ * Return: 0 on success
+ */
+static int xcsi2rxss_log_status(struct v4l2_subdev *sd)
+{
+ struct xcsi2rxss_state *xcsi2rxss = to_xcsi2rxssstate(sd);
+ struct xcsi2rxss_core *core = &xcsi2rxss->core;
+ u32 reg, data;
+ unsigned int i, max_vc;
+
+ mutex_lock(&xcsi2rxss->lock);
+
+ xcsi2rxss_log_ipconfig(xcsi2rxss);
+
+ xcsi2rxss_log_counters(xcsi2rxss);
+
+ dev_info(core->dev, "***** Core Status *****\n");
+ data = xcsi2rxss_read(core, XCSI_CSR_OFFSET);
+ dev_info(core->dev, "Short Packet FIFO Full = %s\n",
+ XCSI_GET_BITSET_STR(data, XCSI_CSR_SPFIFOFULL));
+ dev_info(core->dev, "Short Packet FIFO Not Empty = %s\n",
+ XCSI_GET_BITSET_STR(data, XCSI_CSR_SPFIFONE));
+ dev_info(core->dev, "Stream line buffer full = %s\n",
+ XCSI_GET_BITSET_STR(data, XCSI_CSR_SLBF));
+ dev_info(core->dev, "Soft reset/Core disable in progress = %s\n",
+ XCSI_GET_BITSET_STR(data, XCSI_CSR_RIPCD));
+
+ /* Clk & Lane Info */
+ dev_info(core->dev, "******** Clock Lane Info *********\n");
+ data = xcsi2rxss_read(core, XCSI_CLKINFR_OFFSET);
+ dev_info(core->dev, "Clock Lane in Stop State = %s\n",
+ XCSI_GET_BITSET_STR(data, XCSI_CLKINFR_STOP));
+
+ dev_info(core->dev, "******** Data Lane Info *********\n");
+ dev_info(core->dev, "Lane\tSoT Error\tSoT Sync Error\tStop State\n");
+ reg = XCSI_DLXINFR_OFFSET;
+ for (i = 0; i < XCSI_MAXDL_COUNT; i++) {
+ data = xcsi2rxss_read(core, reg);
+
+ dev_info(core->dev, "%d\t%s\t\t%s\t\t%s\n", i,
+ XCSI_GET_BITSET_STR(data, XCSI_DLXINFR_SOTERR),
+ XCSI_GET_BITSET_STR(data, XCSI_DLXINFR_SOTSYNCERR),
+ XCSI_GET_BITSET_STR(data, XCSI_DLXINFR_STOP));
+
+ reg += XCSI_NEXTREG_OFFSET;
+ }
+
+ /* Virtual Channel Image Information */
+ dev_info(core->dev, "********** Virtual Channel Info ************\n");
+ dev_info(core->dev, "VC\tLine Count\tByte Count\tData Type\n");
+ if (core->en_vcx)
+ max_vc = XCSI_MAX_VCX;
+ else
+ max_vc = XCSI_MAX_VC;
+
+ reg = XCSI_VCXINF1R_OFFSET;
+ for (i = 0; i < max_vc; i++) {
+ u32 line_count, byte_count, data_type;
+
+ /* Get line and byte count from VCXINFR1 Register */
+ data = xcsi2rxss_read(core, reg);
+ byte_count = data & XCSI_VCXINF1R_BYTECOUNT;
+ line_count = data & XCSI_VCXINF1R_LINECOUNT;
+ line_count >>= XCSI_VCXINF1R_LINECOUNT_SHIFT;
+
+ /* Get data type from VCXINFR2 Register */
+ reg += XCSI_NEXTREG_OFFSET;
+ data = xcsi2rxss_read(core, reg);
+ data_type = data & XCSI_VCXINF2R_DT;
+
+ dev_info(core->dev, "%d\t%d\t\t%d\t\t0x%x\n", i, line_count,
+ byte_count, data_type);
+
+ /* Move to next pair of VC Info registers */
+ reg += XCSI_NEXTREG_OFFSET;
+ }
+
+ mutex_unlock(&xcsi2rxss->lock);
+
+ return 0;
+}
+
+static struct v4l2_subdev *xcsi2rxss_get_remote_subdev(struct media_pad *local)
+{
+ struct media_pad *remote;
+
+ remote = media_entity_remote_pad(local);
+ if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
+ return NULL;
+
+ return media_entity_to_v4l2_subdev(remote->entity);
+}
+
+static int xcsi2rxss_start_stream(struct xcsi2rxss_state *state)
+{
+ struct xcsi2rxss_core *core = &state->core;
+ struct v4l2_subdev *rsubdev;
+ int ret = 0;
+
+ xcsi2rxss_enable(core);
+
+ ret = xcsi2rxss_reset(core);
+ if (ret < 0) {
+ state->streaming = false;
+ return ret;
+ }
+
+ xcsi2rxss_intr_enable(core);
+ state->streaming = true;
+
+ rsubdev = xcsi2rxss_get_remote_subdev(&state->pads[XVIP_PAD_SINK]);
+ ret = v4l2_subdev_call(rsubdev, video, s_stream, 1);
+
+ return ret;
+}
+
+static void xcsi2rxss_stop_stream(struct xcsi2rxss_state *state)
+{
+ struct xcsi2rxss_core *core = &state->core;
+ struct v4l2_subdev *rsubdev;
+
+ rsubdev = xcsi2rxss_get_remote_subdev(&state->pads[XVIP_PAD_SINK]);
+ v4l2_subdev_call(rsubdev, video, s_stream, 0);
+
+ xcsi2rxss_intr_disable(core);
+ xcsi2rxss_disable(core);
+ state->streaming = false;
+}
+
+/**
+ * xcsi2rxss_irq_handler - Interrupt handler for CSI-2
+ * @irq: IRQ number
+ * @dev_id: Pointer to device state
+ *
+ * In the interrupt handler, a list of event counters are updated for
+ * corresponding interrupts. This is useful to get status / debug.
+ *
+ * Return: IRQ_HANDLED after handling interrupts
+ * IRQ_NONE is no interrupts
+ */
+static irqreturn_t xcsi2rxss_irq_handler(int irq, void *dev_id)
+{
+ struct xcsi2rxss_state *state = (struct xcsi2rxss_state *)dev_id;
+ struct xcsi2rxss_core *core = &state->core;
+ u32 status;
+
+ status = xcsi2rxss_read(core, XCSI_ISR_OFFSET) & XCSI_ISR_ALLINTR_MASK;
+ dev_dbg_ratelimited(core->dev, "interrupt status = 0x%08x\n", status);
+
+ if (!status)
+ return IRQ_NONE;
+
+ /* Received a short packet */
+ if (status & XCSI_ISR_SPFIFONE) {
+ dev_dbg_ratelimited(core->dev, "Short packet = 0x%08x\n",
+ xcsi2rxss_read(core, XCSI_SPKTR_OFFSET));
+ }
+
+ /* Short packet FIFO overflow */
+ if (status & XCSI_ISR_SPFIFOF)
+ dev_dbg_ratelimited(core->dev, "Short packet FIFO overflowed\n");
+
+ /*
+ * Stream line buffer full
+ * This means there is a backpressure from downstream IP
+ */
+ if (status & XCSI_ISR_SLBF) {
+ dev_alert_ratelimited(core->dev, "Stream Line Buffer Full!\n");
+ xcsi2rxss_stop_stream(state);
+ if (core->rst_gpio) {
+ gpiod_set_value(core->rst_gpio, 1);
+ /* minimum 40 dphy_clk_200M cycles */
+ ndelay(250);
+ gpiod_set_value(core->rst_gpio, 0);
+ }
+ }
+
+ /* Increment event counters */
+ if (status & XCSI_ISR_ALLINTR_MASK) {
+ unsigned int i;
+
+ for (i = 0; i < XCSI_NUM_EVENTS; i++) {
+ if (!(status & xcsi2rxss_events[i].mask))
+ continue;
+ core->events[i]++;
+ dev_dbg_ratelimited(core->dev, "%s: %d\n",
+ xcsi2rxss_events[i].name,
+ core->events[i]);
+ }
+
+ if (status & XCSI_ISR_VCXFE && core->en_vcx) {
+ u32 vcxstatus;
+
+ vcxstatus = xcsi2rxss_read(core, XCSI_VCXR_OFFSET);
+ vcxstatus &= XCSI_VCXR_VCERR;
+ for (i = 0; i < XCSI_VCX_NUM_EVENTS; i++) {
+ if (!(vcxstatus & (1 << i)))
+ continue;
+ core->vcx_events[i]++;
+ }
+ xcsi2rxss_write(core, XCSI_VCXR_OFFSET, vcxstatus);
+ }
+ }
+
+ xcsi2rxss_write(core, XCSI_ISR_OFFSET, status);
+ return IRQ_HANDLED;
+}
+
+/**
+ * xcsi2rxss_s_stream - It is used to start/stop the streaming.
+ * @sd: V4L2 Sub device
+ * @enable: Flag (True / False)
+ *
+ * This function controls the start or stop of streaming for the
+ * Xilinx MIPI CSI-2 Rx Subsystem.
+ *
+ * Return: 0 on success, errors otherwise
+ */
+static int xcsi2rxss_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct xcsi2rxss_state *xcsi2rxss = to_xcsi2rxssstate(sd);
+ int ret = 0;
+
+ mutex_lock(&xcsi2rxss->lock);
+
+ if (enable) {
+ if (!xcsi2rxss->streaming) {
+ /* reset the event counters */
+ xcsi2rxss_reset_event_counters(xcsi2rxss);
+ ret = xcsi2rxss_start_stream(xcsi2rxss);
+ }
+ } else {
+ if (xcsi2rxss->streaming) {
+ struct gpio_desc *rst = xcsi2rxss->core.rst_gpio;
+
+ xcsi2rxss_stop_stream(xcsi2rxss);
+ if (rst) {
+ gpiod_set_value_cansleep(rst, 1);
+ usleep_range(1, 2);
+ gpiod_set_value_cansleep(rst, 0);
+ }
+ }
+ }
+
+ mutex_unlock(&xcsi2rxss->lock);
+ return ret;
+}
+
+static struct v4l2_mbus_framefmt *
+__xcsi2rxss_get_pad_format(struct xcsi2rxss_state *xcsi2rxss,
+ struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad, u32 which)
+{
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(&xcsi2rxss->subdev, cfg, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &xcsi2rxss->format;
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * xcsi2rxss_get_format - Get the pad format
+ * @sd: Pointer to V4L2 Sub device structure
+ * @cfg: Pointer to sub device pad information structure
+ * @fmt: Pointer to pad level media bus format
+ *
+ * This function is used to get the pad format information.
+ *
+ * Return: 0 on success
+ */
+static int xcsi2rxss_get_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct xcsi2rxss_state *xcsi2rxss = to_xcsi2rxssstate(sd);
+
+ mutex_lock(&xcsi2rxss->lock);
+ fmt->format = *__xcsi2rxss_get_pad_format(xcsi2rxss, cfg, fmt->pad,
+ fmt->which);
+ mutex_unlock(&xcsi2rxss->lock);
+
+ return 0;
+}
+
+/**
+ * xcsi2rxss_set_format - This is used to set the pad format
+ * @sd: Pointer to V4L2 Sub device structure
+ * @cfg: Pointer to sub device pad information structure
+ * @fmt: Pointer to pad level media bus format
+ *
+ * This function is used to set the pad format. Since the pad format is fixed
+ * in hardware, it can't be modified on run time. So when a format set is
+ * requested by application, all parameters except the format type is saved
+ * for the pad and the original pad format is sent back to the application.
+ *
+ * Return: 0 on success
+ */
+static int xcsi2rxss_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct xcsi2rxss_state *xcsi2rxss = to_xcsi2rxssstate(sd);
+ struct xcsi2rxss_core *core = &xcsi2rxss->core;
+ struct v4l2_mbus_framefmt *__format;
+
+ /* only sink pad format can be updated */
+ mutex_lock(&xcsi2rxss->lock);
+
+ /*
+ * Only the format->code parameter matters for CSI as the
+ * CSI format cannot be changed at runtime.
+ * Ensure that format to set is copied to over to CSI pad format
+ */
+ __format = __xcsi2rxss_get_pad_format(xcsi2rxss, cfg,
+ fmt->pad, fmt->which);
+
+ if (fmt->pad == XVIP_PAD_SOURCE) {
+ fmt->format = *__format;
+ mutex_unlock(&xcsi2rxss->lock);
+ return 0;
+ }
+
+ /*
+ * RAW8 is supported in all datatypes. So if requested media bus format
+ * is of RAW8 type, then allow to be set. In case core is configured to
+ * other RAW, YUV422 8/10 or RGB888, set appropriate media bus format.
+ */
+ if (!((fmt->format.code == MEDIA_BUS_FMT_SBGGR8_1X8 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGBRG8_1X8 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGRBG8_1X8 ||
+ fmt->format.code == MEDIA_BUS_FMT_SRGGB8_1X8) ||
+ (core->datatype == XCSI_DT_RAW10 &&
+ (fmt->format.code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGBRG10_1X10 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGRBG10_1X10 ||
+ fmt->format.code == MEDIA_BUS_FMT_SRGGB10_1X10)) ||
+ (core->datatype == XCSI_DT_RAW12 &&
+ (fmt->format.code == MEDIA_BUS_FMT_SBGGR12_1X12 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGBRG12_1X12 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGRBG12_1X12 ||
+ fmt->format.code == MEDIA_BUS_FMT_SRGGB12_1X12)) ||
+ (core->datatype == XCSI_DT_RAW14 &&
+ (fmt->format.code == MEDIA_BUS_FMT_SBGGR14_1X14 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGBRG14_1X14 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGRBG14_1X14 ||
+ fmt->format.code == MEDIA_BUS_FMT_SRGGB14_1X14)) ||
+ (core->datatype == XCSI_DT_RAW16 &&
+ (fmt->format.code == MEDIA_BUS_FMT_SBGGR16_1X16 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGBRG16_1X16 ||
+ fmt->format.code == MEDIA_BUS_FMT_SGRBG16_1X16 ||
+ fmt->format.code == MEDIA_BUS_FMT_SRGGB16_1X16)) ||
+ (core->datatype == XCSI_DT_YUV4228B &&
+ fmt->format.code == MEDIA_BUS_FMT_UYVY8_1X16) ||
+ (core->datatype == XCSI_DT_YUV42210B &&
+ fmt->format.code == MEDIA_BUS_FMT_UYVY10_1X20) ||
+ (core->datatype == XCSI_DT_RGB888 &&
+ fmt->format.code == MEDIA_BUS_FMT_RBG888_1X24))) {
+ /* Restore the original pad format code */
+ dev_dbg(core->dev, "Unsupported media bus format");
+ fmt->format.code = __format->code;
+ }
+
+ *__format = fmt->format;
+ mutex_unlock(&xcsi2rxss->lock);
+
+ return 0;
+}
+
+/*
+ * xcsi2rxss_enum_mbus_code - Handle pixel format enumeration
+ * @sd : pointer to v4l2 subdev structure
+ * @cfg: V4L2 subdev pad configuration
+ * @code : pointer to v4l2_subdev_mbus_code_enum structure
+ *
+ * Return: -EINVAL or zero on success
+ */
+int xcsi2rxss_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct xcsi2rxss_state *state = to_xcsi2rxssstate(sd);
+
+ if (code->index >= state->mbus_fmts_count)
+ return -EINVAL;
+
+ code->code = state->mbus_fmts[code->index];
+
+ return 0;
+}
+
+/**
+ * xcsi2rxss_open - Called on v4l2_open()
+ * @sd: Pointer to V4L2 sub device structure
+ * @fh: Pointer to V4L2 File handle
+ *
+ * This function is called on v4l2_open(). It sets the default format
+ * for both pads.
+ *
+ * Return: 0 on success
+ */
+static int xcsi2rxss_open(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh)
+{
+ struct xcsi2rxss_state *xcsi2rxss = to_xcsi2rxssstate(sd);
+ struct v4l2_mbus_framefmt *format;
+ unsigned int i;
+
+ for (i = 0; i < XCSI_MEDIA_PADS; i++) {
+ format = v4l2_subdev_get_try_format(sd, fh->pad, i);
+ *format = xcsi2rxss->default_format;
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Media Operations
+ */
+
+static const struct media_entity_operations xcsi2rxss_media_ops = {
+ .link_validate = v4l2_subdev_link_validate
+};
+
+static const struct v4l2_subdev_core_ops xcsi2rxss_core_ops = {
+ .log_status = xcsi2rxss_log_status,
+};
+
+static const struct v4l2_subdev_video_ops xcsi2rxss_video_ops = {
+ .s_stream = xcsi2rxss_s_stream
+};
+
+static const struct v4l2_subdev_pad_ops xcsi2rxss_pad_ops = {
+ .get_fmt = xcsi2rxss_get_format,
+ .set_fmt = xcsi2rxss_set_format,
+ .enum_mbus_code = xcsi2rxss_enum_mbus_code,
+ .link_validate = v4l2_subdev_link_validate_default,
+};
+
+static const struct v4l2_subdev_ops xcsi2rxss_ops = {
+ .core = &xcsi2rxss_core_ops,
+ .video = &xcsi2rxss_video_ops,
+ .pad = &xcsi2rxss_pad_ops
+};
+
+static const struct v4l2_subdev_internal_ops xcsi2rxss_internal_ops = {
+ .open = xcsi2rxss_open,
+};
+
+static void xcsi2rxss_set_default_format(struct xcsi2rxss_state *state)
+{
+ struct xcsi2rxss_core *core = &state->core;
+
+ memset(&state->default_format, 0, sizeof(state->default_format));
+
+ switch (core->datatype) {
+ case XCSI_DT_YUV4228B:
+ state->default_format.code = MEDIA_BUS_FMT_UYVY8_1X16;
+ break;
+ case XCSI_DT_RGB888:
+ state->default_format.code = MEDIA_BUS_FMT_RBG888_1X24;
+ break;
+ case XCSI_DT_YUV42210B:
+ state->default_format.code = MEDIA_BUS_FMT_UYVY10_1X20;
+ break;
+ case XCSI_DT_RAW10:
+ state->default_format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
+ break;
+ case XCSI_DT_RAW12:
+ state->default_format.code = MEDIA_BUS_FMT_SRGGB12_1X12;
+ break;
+ case XCSI_DT_RAW14:
+ state->default_format.code = MEDIA_BUS_FMT_SRGGB14_1X14;
+ break;
+ case XCSI_DT_RAW16:
+ state->default_format.code = MEDIA_BUS_FMT_SRGGB16_1X16;
+ break;
+ case XCSI_DT_RAW8:
+ case XCSI_DT_RGB444:
+ case XCSI_DT_RGB555:
+ case XCSI_DT_RGB565:
+ case XCSI_DT_RGB666:
+ state->default_format.code = MEDIA_BUS_FMT_SRGGB8_1X8;
+ break;
+ }
+
+ state->default_format.field = V4L2_FIELD_NONE;
+ state->default_format.colorspace = V4L2_COLORSPACE_SRGB;
+ state->default_format.width = XCSI_DEFAULT_WIDTH;
+ state->default_format.height = XCSI_DEFAULT_HEIGHT;
+
+ dev_dbg(core->dev, "default mediabus format = 0x%x",
+ state->default_format.code);
+}
+
+static void xcsi2rxss_init_mbus_fmts(struct xcsi2rxss_state *state)
+{
+ struct xcsi2rxss_core *core = &state->core;
+
+ XADD_MBUS(state, MEDIA_BUS_FMT_SRGGB8_1X8);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SBGGR8_1X8);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGRBG8_1X8);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGBRG8_1X8);
+
+ switch (core->datatype) {
+ case XCSI_DT_RAW10:
+ XADD_MBUS(state, MEDIA_BUS_FMT_SRGGB10_1X10);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SBGGR10_1X10);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGRBG10_1X10);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGBRG10_1X10);
+ break;
+ case XCSI_DT_RAW12:
+ XADD_MBUS(state, MEDIA_BUS_FMT_SRGGB12_1X12);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SBGGR12_1X12);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGRBG12_1X12);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGBRG12_1X12);
+ break;
+ case XCSI_DT_RAW14:
+ XADD_MBUS(state, MEDIA_BUS_FMT_SRGGB14_1X14);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SBGGR14_1X14);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGRBG14_1X14);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGBRG14_1X14);
+ break;
+ case XCSI_DT_RAW16:
+ XADD_MBUS(state, MEDIA_BUS_FMT_SRGGB16_1X16);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SBGGR16_1X16);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGRBG16_1X16);
+ XADD_MBUS(state, MEDIA_BUS_FMT_SGBRG16_1X16);
+ break;
+ case XCSI_DT_YUV4228B:
+ XADD_MBUS(state, MEDIA_BUS_FMT_UYVY8_1X16);
+ break;
+ case XCSI_DT_RGB888:
+ XADD_MBUS(state, MEDIA_BUS_FMT_RBG888_1X24);
+ break;
+ case XCSI_DT_YUV42210B:
+ XADD_MBUS(state, MEDIA_BUS_FMT_UYVY10_1X20);
+ break;
+ default:
+ dev_err(core->dev, "Invalid data type!\n");
+ }
+}
+
+static int xcsi2rxss_parse_of(struct xcsi2rxss_state *xcsi2rxss)
+{
+ struct xcsi2rxss_core *core = &xcsi2rxss->core;
+ struct device_node *node = xcsi2rxss->core.dev->of_node;
+ unsigned int nports, irq;
+ bool en_csi_v20, vfb;
+ int ret;
+
+ en_csi_v20 = of_property_read_bool(node, "xlnx,en-csi-v2-0");
+ if (en_csi_v20)
+ core->en_vcx = of_property_read_bool(node, "xlnx,en-vcx");
+
+ core->enable_active_lanes =
+ of_property_read_bool(node, "xlnx,en-active-lanes");
+
+ ret = of_property_read_u32(node, "xlnx,csi-pxl-format",
+ &core->datatype);
+ if (ret < 0) {
+ dev_err(core->dev, "missing xlnx,csi-pxl-format property\n");
+ return ret;
+ }
+
+ switch (core->datatype) {
+ case XCSI_DT_YUV4228B:
+ case XCSI_DT_RGB444:
+ case XCSI_DT_RGB555:
+ case XCSI_DT_RGB565:
+ case XCSI_DT_RGB666:
+ case XCSI_DT_RGB888:
+ case XCSI_DT_RAW6:
+ case XCSI_DT_RAW7:
+ case XCSI_DT_RAW8:
+ case XCSI_DT_RAW10:
+ case XCSI_DT_RAW12:
+ case XCSI_DT_RAW14:
+ break;
+ case XCSI_DT_YUV42210B:
+ case XCSI_DT_RAW16:
+ case XCSI_DT_RAW20:
+ if (!en_csi_v20) {
+ ret = -EINVAL;
+ dev_dbg(core->dev, "enable csi v2 for this pixel format");
+ }
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ if (ret < 0) {
+ dev_err(core->dev, "invalid csi-pxl-format property!\n");
+ return ret;
+ }
+
+ vfb = of_property_read_bool(node, "xlnx,vfb");
+ if (!vfb) {
+ dev_err(core->dev, "failed as VFB is disabled!\n");
+ return -EINVAL;
+ }
+
+ for (nports = 0; nports < XCSI_MEDIA_PADS; nports++) {
+ struct fwnode_handle *ep;
+ struct v4l2_fwnode_endpoint vep = {
+ .bus_type = V4L2_MBUS_CSI2_DPHY
+ };
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(core->dev),
+ nports, 0,
+ FWNODE_GRAPH_ENDPOINT_NEXT);
+ if (!ep)
+ break;
+ /*
+ * since first port is sink port and it contains
+ * all info about data-lanes and cfa-pattern,
+ * don't parse second port but only check if exists
+ */
+ if (nports == XVIP_PAD_SOURCE) {
+ dev_dbg(core->dev, "no need to parse source port");
+ fwnode_handle_put(ep);
+ continue;
+ }
+
+ ret = v4l2_fwnode_endpoint_parse(ep, &vep);
+ if (ret) {
+ dev_err(core->dev, "error parsing sink port");
+ fwnode_handle_put(ep);
+ return ret;
+ }
+
+ dev_dbg(core->dev, "port %d bus type = %d\n", nports,
+ vep.bus_type);
+
+ if (vep.bus_type == V4L2_MBUS_CSI2_DPHY) {
+ dev_dbg(core->dev, "base.port = %d base.id = %d\n",
+ vep.base.port, vep.base.id);
+
+ dev_dbg(core->dev, "mipi number lanes = %d\n",
+ vep.bus.mipi_csi2.num_data_lanes);
+
+ core->max_num_lanes =
+ vep.bus.mipi_csi2.num_data_lanes;
+ }
+ fwnode_handle_put(ep);
+ }
+
+ if (nports != XCSI_MEDIA_PADS) {
+ dev_err(core->dev, "invalid number of ports %u\n", nports);
+ return -EINVAL;
+ }
+
+ /* Register interrupt handler */
+ irq = irq_of_parse_and_map(node, 0);
+ ret = devm_request_irq(core->dev, irq, xcsi2rxss_irq_handler,
+ IRQF_SHARED, "xilinx-csi2rxss", xcsi2rxss);
+ if (ret) {
+ dev_err(core->dev, "Err = %d Interrupt handler reg failed!\n",
+ ret);
+ return ret;
+ }
+
+ xcsi2rxss_log_ipconfig(xcsi2rxss);
+
+ return 0;
+}
+
+static int xcsi2rxss_probe(struct platform_device *pdev)
+{
+ struct v4l2_subdev *subdev;
+ struct xcsi2rxss_state *xcsi2rxss;
+ struct xcsi2rxss_core *core;
+ struct resource *res;
+ int num_clks = ARRAY_SIZE(xcsi2rxss_clks);
+ int ret;
+
+ xcsi2rxss = devm_kzalloc(&pdev->dev, sizeof(*xcsi2rxss), GFP_KERNEL);
+ if (!xcsi2rxss)
+ return -ENOMEM;
+
+ core = &xcsi2rxss->core;
+ core->dev = &pdev->dev;
+
+ core->clks = devm_kmemdup(core->dev, xcsi2rxss_clks,
+ sizeof(xcsi2rxss_clks), GFP_KERNEL);
+ if (!core->clks)
+ return -ENOMEM;
+
+ /* Reset GPIO */
+ core->rst_gpio = devm_gpiod_get_optional(core->dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(core->rst_gpio)) {
+ if (PTR_ERR(core->rst_gpio) != -EPROBE_DEFER)
+ dev_err(core->dev, "Video Reset GPIO not setup in DT");
+ return PTR_ERR(core->rst_gpio);
+ }
+
+ mutex_init(&xcsi2rxss->lock);
+
+ ret = xcsi2rxss_parse_of(xcsi2rxss);
+ if (ret < 0)
+ return ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ core->iomem = devm_ioremap_resource(core->dev, res);
+ if (IS_ERR(core->iomem))
+ return PTR_ERR(core->iomem);
+
+ ret = clk_bulk_get(core->dev, num_clks, core->clks);
+ if (ret)
+ return ret;
+
+ ret = clk_bulk_prepare_enable(num_clks, core->clks);
+ if (ret)
+ goto err_clk_put;
+
+ if (core->rst_gpio) {
+ gpiod_set_value_cansleep(core->rst_gpio, 1);
+ /* minimum of 40 dphy_clk_200M cycles */
+ usleep_range(1, 2);
+ gpiod_set_value_cansleep(core->rst_gpio, 0);
+ }
+
+ xcsi2rxss_reset(core);
+
+ /* Initialize V4L2 subdevice and media entity */
+ xcsi2rxss->pads[XVIP_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ xcsi2rxss->pads[XVIP_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+
+ /* Initialize the default format */
+ xcsi2rxss_set_default_format(xcsi2rxss);
+ xcsi2rxss->format = xcsi2rxss->default_format;
+
+ /* Initialize the mbus formats supported */
+ xcsi2rxss_init_mbus_fmts(xcsi2rxss);
+
+ /* Initialize V4L2 subdevice and media entity */
+ subdev = &xcsi2rxss->subdev;
+ v4l2_subdev_init(subdev, &xcsi2rxss_ops);
+ subdev->dev = &pdev->dev;
+ subdev->internal_ops = &xcsi2rxss_internal_ops;
+ strscpy(subdev->name, dev_name(&pdev->dev), sizeof(subdev->name));
+ subdev->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
+ subdev->entity.ops = &xcsi2rxss_media_ops;
+ v4l2_set_subdevdata(subdev, xcsi2rxss);
+
+ ret = media_entity_pads_init(&subdev->entity, XCSI_MEDIA_PADS,
+ xcsi2rxss->pads);
+ if (ret < 0)
+ goto error;
+
+ platform_set_drvdata(pdev, xcsi2rxss);
+
+ ret = v4l2_async_register_subdev(subdev);
+ if (ret < 0) {
+ dev_err(core->dev, "failed to register subdev\n");
+ goto error;
+ }
+
+ dev_info(core->dev, "Xilinx CSI2 Rx Subsystem device found!\n");
+
+ return 0;
+error:
+ media_entity_cleanup(&subdev->entity);
+ mutex_destroy(&xcsi2rxss->lock);
+ clk_bulk_disable_unprepare(num_clks, core->clks);
+err_clk_put:
+ clk_bulk_put(num_clks, core->clks);
+ return ret;
+}
+
+static int xcsi2rxss_remove(struct platform_device *pdev)
+{
+ struct xcsi2rxss_state *xcsi2rxss = platform_get_drvdata(pdev);
+ struct xcsi2rxss_core *core = &xcsi2rxss->core;
+ struct v4l2_subdev *subdev = &xcsi2rxss->subdev;
+ int num_clks = ARRAY_SIZE(xcsi2rxss_clks);
+
+ v4l2_async_unregister_subdev(subdev);
+ media_entity_cleanup(&subdev->entity);
+ mutex_destroy(&xcsi2rxss->lock);
+ clk_bulk_disable_unprepare(num_clks, core->clks);
+ clk_bulk_put(num_clks, core->clks);
+
+ return 0;
+}
+
+static const struct of_device_id xcsi2rxss_of_id_table[] = {
+ { .compatible = "xlnx,mipi-csi2-rx-subsystem-5.0", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, xcsi2rxss_of_id_table);
+
+static struct platform_driver xcsi2rxss_driver = {
+ .driver = {
+ .name = "xilinx-csi2rxss",
+ .of_match_table = xcsi2rxss_of_id_table,
+ },
+ .probe = xcsi2rxss_probe,
+ .remove = xcsi2rxss_remove,
+};
+
+module_platform_driver(xcsi2rxss_driver);
+
+MODULE_AUTHOR("Vishal Sagar <vsagar@xilinx.com>");
+MODULE_DESCRIPTION("Xilinx MIPI CSI2 Rx Subsystem Driver");
+MODULE_LICENSE("GPL v2");