--- /dev/null
+From 0dc93c9321ba947ac429baeb58202496e4b0f219 Mon Sep 17 00:00:00 2001
+From: Jack Zhu <jack.zhu@starfivetech.com>
+Date: Fri, 12 May 2023 18:28:41 +0800
+Subject: [PATCH 083/122] media: starfive: Add basic driver
+
+Add basic platform driver for StarFive Camera Subsystem.
+
+Signed-off-by: Jack Zhu <jack.zhu@starfivetech.com>
+Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
+---
+ drivers/media/platform/Kconfig | 1 +
+ drivers/media/platform/Makefile | 1 +
+ drivers/media/platform/starfive/Kconfig | 19 +
+ drivers/media/platform/starfive/Makefile | 9 +
+ drivers/media/platform/starfive/stf_camss.c | 372 +++++++++++++++++++
+ drivers/media/platform/starfive/stf_camss.h | 153 ++++++++
+ drivers/media/platform/starfive/stf_common.h | 18 +
+ 7 files changed, 573 insertions(+)
+ create mode 100644 drivers/media/platform/starfive/Kconfig
+ create mode 100644 drivers/media/platform/starfive/Makefile
+ create mode 100644 drivers/media/platform/starfive/stf_camss.c
+ create mode 100644 drivers/media/platform/starfive/stf_camss.h
+ create mode 100644 drivers/media/platform/starfive/stf_common.h
+
+diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
+index a9334263fa9b..6895572d63d4 100644
+--- a/drivers/media/platform/Kconfig
++++ b/drivers/media/platform/Kconfig
+@@ -79,6 +79,7 @@ source "drivers/media/platform/renesas/Kconfig"
+ source "drivers/media/platform/rockchip/Kconfig"
+ source "drivers/media/platform/samsung/Kconfig"
+ source "drivers/media/platform/st/Kconfig"
++source "drivers/media/platform/starfive/Kconfig"
+ source "drivers/media/platform/sunxi/Kconfig"
+ source "drivers/media/platform/ti/Kconfig"
+ source "drivers/media/platform/verisilicon/Kconfig"
+diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
+index a91f42024273..3b9d430571be 100644
+--- a/drivers/media/platform/Makefile
++++ b/drivers/media/platform/Makefile
+@@ -22,6 +22,7 @@ obj-y += renesas/
+ obj-y += rockchip/
+ obj-y += samsung/
+ obj-y += st/
++obj-y += starfive/
+ obj-y += sunxi/
+ obj-y += ti/
+ obj-y += verisilicon/
+diff --git a/drivers/media/platform/starfive/Kconfig b/drivers/media/platform/starfive/Kconfig
+new file mode 100644
+index 000000000000..1a2293475bd2
+--- /dev/null
++++ b/drivers/media/platform/starfive/Kconfig
+@@ -0,0 +1,19 @@
++# SPDX-License-Identifier: GPL-2.0-only
++
++comment "Starfive media platform drivers"
++
++config VIDEO_STARFIVE_CAMSS
++ tristate "Starfive Camera Subsystem driver"
++ depends on V4L_PLATFORM_DRIVERS
++ depends on VIDEO_DEV && OF
++ depends on DMA_CMA
++ select MEDIA_CONTROLLER
++ select VIDEO_V4L2_SUBDEV_API
++ select VIDEOBUF2_DMA_CONTIG
++ select V4L2_FWNODE
++ help
++ Enable this to support for the Starfive Camera subsystem
++ found on Starfive JH7110 SoC.
++
++ To compile this driver as a module, choose M here: the
++ module will be called stf-camss.
+diff --git a/drivers/media/platform/starfive/Makefile b/drivers/media/platform/starfive/Makefile
+new file mode 100644
+index 000000000000..796775fa52f4
+--- /dev/null
++++ b/drivers/media/platform/starfive/Makefile
+@@ -0,0 +1,9 @@
++# SPDX-License-Identifier: GPL-2.0
++#
++# Makefile for StarFive camera subsystem driver.
++#
++
++starfive-camss-objs += \
++ stf_camss.o
++
++obj-$(CONFIG_VIDEO_STARFIVE_CAMSS) += starfive-camss.o \
+diff --git a/drivers/media/platform/starfive/stf_camss.c b/drivers/media/platform/starfive/stf_camss.c
+new file mode 100644
+index 000000000000..ba3a2bc8a8ab
+--- /dev/null
++++ b/drivers/media/platform/starfive/stf_camss.c
+@@ -0,0 +1,372 @@
++// SPDX-License-Identifier: GPL-2.0
++/*
++ * stf_camss.c
++ *
++ * Starfive Camera Subsystem driver
++ *
++ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
++ */
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/of_graph.h>
++#include <linux/platform_device.h>
++#include <linux/pm_runtime.h>
++#include <linux/videodev2.h>
++#include <media/media-device.h>
++#include <media/v4l2-async.h>
++#include <media/v4l2-fwnode.h>
++#include <media/v4l2-mc.h>
++
++#include "stf_camss.h"
++
++static const char * const stfcamss_clocks[] = {
++ "clk_apb_func",
++ "clk_wrapper_clk_c",
++ "clk_dvp_inv",
++ "clk_axiwr",
++ "clk_mipi_rx0_pxl",
++ "clk_ispcore_2x",
++ "clk_isp_axi",
++};
++
++static const char * const stfcamss_resets[] = {
++ "rst_wrapper_p",
++ "rst_wrapper_c",
++ "rst_axird",
++ "rst_axiwr",
++ "rst_isp_top_n",
++ "rst_isp_top_axi",
++};
++
++static int stfcamss_get_mem_res(struct platform_device *pdev,
++ struct stfcamss *stfcamss)
++{
++ stfcamss->syscon_base =
++ devm_platform_ioremap_resource_byname(pdev, "syscon");
++ if (IS_ERR(stfcamss->syscon_base))
++ return PTR_ERR(stfcamss->syscon_base);
++
++ stfcamss->isp_base =
++ devm_platform_ioremap_resource_byname(pdev, "isp");
++ if (IS_ERR(stfcamss->isp_base))
++ return PTR_ERR(stfcamss->isp_base);
++
++ return 0;
++}
++
++/*
++ * stfcamss_of_parse_endpoint_node - Parse port endpoint node
++ * @dev: Device
++ * @node: Device node to be parsed
++ * @csd: Parsed data from port endpoint node
++ *
++ * Return 0 on success or a negative error code on failure
++ */
++static int stfcamss_of_parse_endpoint_node(struct device *dev,
++ struct device_node *node,
++ struct stfcamss_async_subdev *csd)
++{
++ struct v4l2_fwnode_endpoint vep = { { 0 } };
++
++ v4l2_fwnode_endpoint_parse(of_fwnode_handle(node), &vep);
++ dev_dbg(dev, "vep.base.port = 0x%x, id = 0x%x\n",
++ vep.base.port, vep.base.id);
++
++ csd->port = vep.base.port;
++
++ return 0;
++}
++
++/*
++ * stfcamss_of_parse_ports - Parse ports node
++ * @stfcamss: STFCAMSS device
++ *
++ * Return number of "port" nodes found in "ports" node
++ */
++static int stfcamss_of_parse_ports(struct stfcamss *stfcamss)
++{
++ struct device *dev = stfcamss->dev;
++ struct device_node *node = NULL;
++ struct device_node *remote = NULL;
++ int ret, num_subdevs = 0;
++
++ for_each_endpoint_of_node(dev->of_node, node) {
++ struct stfcamss_async_subdev *csd;
++
++ if (!of_device_is_available(node))
++ continue;
++
++ remote = of_graph_get_remote_port_parent(node);
++ if (!remote) {
++ dev_err(dev, "Cannot get remote parent\n");
++ ret = -EINVAL;
++ goto err_cleanup;
++ }
++
++ csd = v4l2_async_nf_add_fwnode(&stfcamss->notifier,
++ of_fwnode_handle(remote),
++ struct stfcamss_async_subdev);
++ of_node_put(remote);
++ if (IS_ERR(csd)) {
++ ret = PTR_ERR(csd);
++ goto err_cleanup;
++ }
++
++ ret = stfcamss_of_parse_endpoint_node(dev, node, csd);
++ if (ret < 0)
++ goto err_cleanup;
++
++ num_subdevs++;
++ }
++
++ return num_subdevs;
++
++err_cleanup:
++ of_node_put(node);
++ return ret;
++}
++
++static int stfcamss_subdev_notifier_bound(struct v4l2_async_notifier *async,
++ struct v4l2_subdev *subdev,
++ struct v4l2_async_subdev *asd)
++{
++ struct stfcamss *stfcamss =
++ container_of(async, struct stfcamss, notifier);
++ struct host_data *host_data = &stfcamss->host_data;
++ struct media_entity *source;
++ int i, j;
++
++ source = &subdev->entity;
++
++ for (i = 0; i < source->num_pads; i++) {
++ if (source->pads[i].flags & MEDIA_PAD_FL_SOURCE)
++ break;
++ }
++
++ if (i == source->num_pads) {
++ dev_err(stfcamss->dev, "No source pad in external entity\n");
++ return -EINVAL;
++ }
++
++ for (j = 0; host_data->host_entity[j] && (j < HOST_ENTITY_MAX); j++) {
++ struct media_entity *input;
++ int ret;
++
++ input = host_data->host_entity[j];
++
++ ret = media_create_pad_link(
++ source,
++ i,
++ input,
++ STF_PAD_SINK,
++ source->function == MEDIA_ENT_F_CAM_SENSOR ?
++ MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED :
++ 0);
++ if (ret < 0) {
++ dev_err(stfcamss->dev,
++ "Failed to link %s->%s entities: %d\n",
++ source->name, input->name, ret);
++ return ret;
++ }
++ }
++
++ return 0;
++}
++
++static int stfcamss_subdev_notifier_complete(struct v4l2_async_notifier *ntf)
++{
++ struct stfcamss *stfcamss =
++ container_of(ntf, struct stfcamss, notifier);
++
++ return v4l2_device_register_subdev_nodes(&stfcamss->v4l2_dev);
++}
++
++static const struct v4l2_async_notifier_operations
++stfcamss_subdev_notifier_ops = {
++ .bound = stfcamss_subdev_notifier_bound,
++ .complete = stfcamss_subdev_notifier_complete,
++};
++
++static const struct media_device_ops stfcamss_media_ops = {
++ .link_notify = v4l2_pipeline_link_notify,
++};
++
++static void stfcamss_mc_init(struct platform_device *pdev,
++ struct stfcamss *stfcamss)
++{
++ stfcamss->media_dev.dev = stfcamss->dev;
++ strscpy(stfcamss->media_dev.model, "Starfive Camera Subsystem",
++ sizeof(stfcamss->media_dev.model));
++ snprintf(stfcamss->media_dev.bus_info,
++ sizeof(stfcamss->media_dev.bus_info),
++ "%s:%s", dev_bus_name(&pdev->dev), pdev->name);
++ stfcamss->media_dev.hw_revision = 0x01;
++ stfcamss->media_dev.ops = &stfcamss_media_ops;
++ media_device_init(&stfcamss->media_dev);
++
++ stfcamss->v4l2_dev.mdev = &stfcamss->media_dev;
++}
++
++/*
++ * stfcamss_probe - Probe STFCAMSS platform device
++ * @pdev: Pointer to STFCAMSS platform device
++ *
++ * Return 0 on success or a negative error code on failure
++ */
++static int stfcamss_probe(struct platform_device *pdev)
++{
++ struct stfcamss *stfcamss;
++ struct device *dev = &pdev->dev;
++ int ret = 0, i, num_subdevs;
++
++ stfcamss = devm_kzalloc(dev, sizeof(*stfcamss), GFP_KERNEL);
++ if (!stfcamss)
++ return -ENOMEM;
++
++ for (i = 0; i < ARRAY_SIZE(stfcamss->irq); ++i) {
++ stfcamss->irq[i] = platform_get_irq(pdev, i);
++ if (stfcamss->irq[i] < 0)
++ return dev_err_probe(&pdev->dev, stfcamss->irq[i],
++ "Failed to get clock%d", i);
++ }
++
++ stfcamss->nclks = ARRAY_SIZE(stfcamss->sys_clk);
++ for (i = 0; i < ARRAY_SIZE(stfcamss->sys_clk); ++i)
++ stfcamss->sys_clk[i].id = stfcamss_clocks[i];
++ ret = devm_clk_bulk_get(dev, stfcamss->nclks, stfcamss->sys_clk);
++ if (ret) {
++ dev_err(dev, "Failed to get clk controls\n");
++ return ret;
++ }
++
++ stfcamss->nrsts = ARRAY_SIZE(stfcamss->sys_rst);
++ for (i = 0; i < ARRAY_SIZE(stfcamss->sys_rst); ++i)
++ stfcamss->sys_rst[i].id = stfcamss_resets[i];
++ ret = devm_reset_control_bulk_get_shared(dev, stfcamss->nrsts,
++ stfcamss->sys_rst);
++ if (ret) {
++ dev_err(dev, "Failed to get reset controls\n");
++ return ret;
++ }
++
++ ret = stfcamss_get_mem_res(pdev, stfcamss);
++ if (ret) {
++ dev_err(dev, "Could not map registers\n");
++ return ret;
++ }
++
++ stfcamss->dev = dev;
++ platform_set_drvdata(pdev, stfcamss);
++
++ v4l2_async_nf_init(&stfcamss->notifier);
++
++ num_subdevs = stfcamss_of_parse_ports(stfcamss);
++ if (num_subdevs < 0) {
++ dev_err(dev, "Failed to find subdevices\n");
++ return -ENODEV;
++ }
++
++ stfcamss_mc_init(pdev, stfcamss);
++
++ ret = v4l2_device_register(stfcamss->dev, &stfcamss->v4l2_dev);
++ if (ret < 0) {
++ dev_err(dev, "Failed to register V4L2 device: %d\n", ret);
++ goto err_cleanup_notifier;
++ }
++
++ ret = media_device_register(&stfcamss->media_dev);
++ if (ret) {
++ dev_err(dev, "Failed to register media device: %d\n", ret);
++ goto err_unregister_device;
++ }
++
++ stfcamss->notifier.ops = &stfcamss_subdev_notifier_ops;
++ ret = v4l2_async_nf_register(&stfcamss->v4l2_dev, &stfcamss->notifier);
++ if (ret) {
++ dev_err(dev, "Failed to register async subdev nodes: %d\n",
++ ret);
++ goto err_unregister_media_dev;
++ }
++
++ pm_runtime_enable(dev);
++
++ return 0;
++
++err_unregister_media_dev:
++ media_device_unregister(&stfcamss->media_dev);
++err_unregister_device:
++ v4l2_device_unregister(&stfcamss->v4l2_dev);
++err_cleanup_notifier:
++ v4l2_async_nf_cleanup(&stfcamss->notifier);
++ return ret;
++}
++
++/*
++ * stfcamss_remove - Remove STFCAMSS platform device
++ * @pdev: Pointer to STFCAMSS platform device
++ *
++ * Always returns 0.
++ */
++static int stfcamss_remove(struct platform_device *pdev)
++{
++ struct stfcamss *stfcamss = platform_get_drvdata(pdev);
++
++ v4l2_device_unregister(&stfcamss->v4l2_dev);
++ media_device_cleanup(&stfcamss->media_dev);
++ pm_runtime_disable(&pdev->dev);
++
++ return 0;
++}
++
++static const struct of_device_id stfcamss_of_match[] = {
++ { .compatible = "starfive,jh7110-camss" },
++ { /* sentinel */ },
++};
++
++MODULE_DEVICE_TABLE(of, stfcamss_of_match);
++
++static int __maybe_unused stfcamss_runtime_suspend(struct device *dev)
++{
++ struct stfcamss *stfcamss = dev_get_drvdata(dev);
++
++ reset_control_assert(stfcamss->sys_rst[STF_RST_ISP_TOP_AXI].rstc);
++ reset_control_assert(stfcamss->sys_rst[STF_RST_ISP_TOP_N].rstc);
++ clk_disable_unprepare(stfcamss->sys_clk[STF_CLK_ISP_AXI].clk);
++ clk_disable_unprepare(stfcamss->sys_clk[STF_CLK_ISPCORE_2X].clk);
++
++ return 0;
++}
++
++static int __maybe_unused stfcamss_runtime_resume(struct device *dev)
++{
++ struct stfcamss *stfcamss = dev_get_drvdata(dev);
++
++ clk_prepare_enable(stfcamss->sys_clk[STF_CLK_ISPCORE_2X].clk);
++ clk_prepare_enable(stfcamss->sys_clk[STF_CLK_ISP_AXI].clk);
++ reset_control_deassert(stfcamss->sys_rst[STF_RST_ISP_TOP_N].rstc);
++ reset_control_deassert(stfcamss->sys_rst[STF_RST_ISP_TOP_AXI].rstc);
++
++ return 0;
++}
++
++static const struct dev_pm_ops stfcamss_pm_ops = {
++ SET_RUNTIME_PM_OPS(stfcamss_runtime_suspend,
++ stfcamss_runtime_resume,
++ NULL)
++};
++
++static struct platform_driver stfcamss_driver = {
++ .probe = stfcamss_probe,
++ .remove = stfcamss_remove,
++ .driver = {
++ .name = DRV_NAME,
++ .pm = &stfcamss_pm_ops,
++ .of_match_table = of_match_ptr(stfcamss_of_match),
++ },
++};
++
++module_platform_driver(stfcamss_driver);
++
++MODULE_AUTHOR("StarFive Corporation");
++MODULE_DESCRIPTION("StarFive Camera Subsystem driver");
++MODULE_LICENSE("GPL");
+diff --git a/drivers/media/platform/starfive/stf_camss.h b/drivers/media/platform/starfive/stf_camss.h
+new file mode 100644
+index 000000000000..8f39cd65950c
+--- /dev/null
++++ b/drivers/media/platform/starfive/stf_camss.h
+@@ -0,0 +1,153 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * stf_camss.h
++ *
++ * Starfive Camera Subsystem driver
++ *
++ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
++ */
++
++#ifndef STF_CAMSS_H
++#define STF_CAMSS_H
++
++#include <linux/clk.h>
++#include <linux/delay.h>
++#include <linux/reset.h>
++#include <media/v4l2-device.h>
++
++#include "stf_common.h"
++
++#define DRV_NAME "starfive-camss"
++#define STF_DVP_NAME "stf_dvp"
++#define STF_CSI_NAME "cdns_csi2rx"
++#define STF_ISP_NAME "stf_isp"
++#define STF_VIN_NAME "stf_vin"
++
++#define STF_PAD_SINK 0
++#define STF_PAD_SRC 1
++#define STF_PADS_NUM 2
++
++enum port_num {
++ PORT_NUMBER_DVP_SENSOR = 0,
++ PORT_NUMBER_CSI2RX
++};
++
++enum stf_clk {
++ STF_CLK_APB_FUNC = 0,
++ STF_CLK_WRAPPER_CLK_C,
++ STF_CLK_DVP_INV,
++ STF_CLK_AXIWR,
++ STF_CLK_MIPI_RX0_PXL,
++ STF_CLK_ISPCORE_2X,
++ STF_CLK_ISP_AXI,
++ STF_CLK_NUM
++};
++
++enum stf_rst {
++ STF_RST_WRAPPER_P = 0,
++ STF_RST_WRAPPER_C,
++ STF_RST_AXIRD,
++ STF_RST_AXIWR,
++ STF_RST_ISP_TOP_N,
++ STF_RST_ISP_TOP_AXI,
++ STF_RST_NUM
++};
++
++enum stf_irq {
++ STF_IRQ_VINWR = 0,
++ STF_IRQ_ISP,
++ STF_IRQ_ISPCSIL,
++ STF_IRQ_NUM
++};
++
++#define HOST_ENTITY_MAX 2
++
++struct host_data {
++ struct media_entity *host_entity[HOST_ENTITY_MAX];
++};
++
++struct stfcamss {
++ struct v4l2_device v4l2_dev;
++ struct media_device media_dev;
++ struct media_pipeline pipe;
++ struct device *dev;
++ struct v4l2_async_notifier notifier;
++ struct host_data host_data;
++ void __iomem *syscon_base;
++ void __iomem *isp_base;
++ int irq[STF_IRQ_NUM];
++ struct clk_bulk_data sys_clk[STF_CLK_NUM];
++ int nclks;
++ struct reset_control_bulk_data sys_rst[STF_RST_NUM];
++ int nrsts;
++};
++
++struct stfcamss_async_subdev {
++ struct v4l2_async_subdev asd; /* must be first */
++ enum port_num port;
++};
++
++static inline u32 stf_isp_reg_read(struct stfcamss *stfcamss, u32 reg)
++{
++ return ioread32(stfcamss->isp_base + reg);
++}
++
++static inline void stf_isp_reg_write(struct stfcamss *stfcamss,
++ u32 reg, u32 val)
++{
++ iowrite32(val, stfcamss->isp_base + reg);
++}
++
++static inline void stf_isp_reg_write_delay(struct stfcamss *stfcamss,
++ u32 reg, u32 val, u32 delay)
++{
++ iowrite32(val, stfcamss->isp_base + reg);
++ usleep_range(1000 * delay, 1000 * delay + 100);
++}
++
++static inline void stf_isp_reg_set_bit(struct stfcamss *stfcamss,
++ u32 reg, u32 mask, u32 val)
++{
++ u32 value;
++
++ value = ioread32(stfcamss->isp_base + reg) & ~mask;
++ val &= mask;
++ val |= value;
++ iowrite32(val, stfcamss->isp_base + reg);
++}
++
++static inline void stf_isp_reg_set(struct stfcamss *stfcamss, u32 reg, u32 mask)
++{
++ iowrite32(ioread32(stfcamss->isp_base + reg) | mask,
++ stfcamss->isp_base + reg);
++}
++
++static inline u32 stf_syscon_reg_read(struct stfcamss *stfcamss, u32 reg)
++{
++ return ioread32(stfcamss->syscon_base + reg);
++}
++
++static inline void stf_syscon_reg_write(struct stfcamss *stfcamss,
++ u32 reg, u32 val)
++{
++ iowrite32(val, stfcamss->syscon_base + reg);
++}
++
++static inline void stf_syscon_reg_set_bit(struct stfcamss *stfcamss,
++ u32 reg, u32 bit_mask)
++{
++ u32 value;
++
++ value = ioread32(stfcamss->syscon_base + reg);
++ iowrite32(value | bit_mask, stfcamss->syscon_base + reg);
++}
++
++static inline void stf_syscon_reg_clear_bit(struct stfcamss *stfcamss,
++ u32 reg, u32 bit_mask)
++{
++ u32 value;
++
++ value = ioread32(stfcamss->syscon_base + reg);
++ iowrite32(value & ~bit_mask, stfcamss->syscon_base + reg);
++}
++#endif /* STF_CAMSS_H */
+diff --git a/drivers/media/platform/starfive/stf_common.h b/drivers/media/platform/starfive/stf_common.h
+new file mode 100644
+index 000000000000..e04fca2d9cd4
+--- /dev/null
++++ b/drivers/media/platform/starfive/stf_common.h
+@@ -0,0 +1,18 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++/*
++ * stf_common.h
++ *
++ * StarFive Camera Subsystem - Common definitions
++ *
++ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
++ */
++
++#ifndef STF_COMMON_H
++#define STF_COMMON_H
++
++enum stf_subdev_type {
++ STF_SUBDEV_TYPE_VIN,
++ STF_SUBDEV_TYPE_ISP,
++};
++
++#endif /* STF_COMMON_H */
+--
+2.20.1
+
projects / openwrt / staging / wigyori.git / blobdiff