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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011-2018 Magewell Electronics Co., Ltd. (Nanjing)
* All rights reserved.
* Author: Yong Deng <yong.deng@magewell.com>
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioctl.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/sched.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include "sun6i_csi.h"
#include "sun6i_csi_reg.h"
#define MODULE_NAME "sun6i-csi"
struct sun6i_csi_dev {
struct sun6i_csi csi;
struct device *dev;
struct regmap *regmap;
struct clk *clk_mod;
struct clk *clk_ram;
struct reset_control *rstc_bus;
int planar_offset[3];
};
static inline struct sun6i_csi_dev *sun6i_csi_to_dev(struct sun6i_csi *csi)
{
return container_of(csi, struct sun6i_csi_dev, csi);
}
/* TODO add 10&12 bit YUV, RGB support */
bool sun6i_csi_is_format_supported(struct sun6i_csi *csi,
u32 pixformat, u32 mbus_code)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
/*
* Some video receivers have the ability to be compatible with
* 8bit and 16bit bus width.
* Identify the media bus format from device tree.
*/
if ((sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_PARALLEL
|| sdev->csi.v4l2_ep.bus_type == V4L2_MBUS_BT656)
&& sdev->csi.v4l2_ep.bus.parallel.bus_width == 16) {
switch (pixformat) {
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV422P:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_1X16:
case MEDIA_BUS_FMT_VYUY8_1X16:
case MEDIA_BUS_FMT_YUYV8_1X16:
case MEDIA_BUS_FMT_YVYU8_1X16:
return true;
default:
dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
default:
dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n",
pixformat);
break;
}
return false;
}
switch (pixformat) {
case V4L2_PIX_FMT_SBGGR8:
return (mbus_code == MEDIA_BUS_FMT_SBGGR8_1X8);
case V4L2_PIX_FMT_SGBRG8:
return (mbus_code == MEDIA_BUS_FMT_SGBRG8_1X8);
case V4L2_PIX_FMT_SGRBG8:
return (mbus_code == MEDIA_BUS_FMT_SGRBG8_1X8);
case V4L2_PIX_FMT_SRGGB8:
return (mbus_code == MEDIA_BUS_FMT_SRGGB8_1X8);
case V4L2_PIX_FMT_SBGGR10:
return (mbus_code == MEDIA_BUS_FMT_SBGGR10_1X10);
case V4L2_PIX_FMT_SGBRG10:
return (mbus_code == MEDIA_BUS_FMT_SGBRG10_1X10);
case V4L2_PIX_FMT_SGRBG10:
return (mbus_code == MEDIA_BUS_FMT_SGRBG10_1X10);
case V4L2_PIX_FMT_SRGGB10:
return (mbus_code == MEDIA_BUS_FMT_SRGGB10_1X10);
case V4L2_PIX_FMT_SBGGR12:
return (mbus_code == MEDIA_BUS_FMT_SBGGR12_1X12);
case V4L2_PIX_FMT_SGBRG12:
return (mbus_code == MEDIA_BUS_FMT_SGBRG12_1X12);
case V4L2_PIX_FMT_SGRBG12:
return (mbus_code == MEDIA_BUS_FMT_SGRBG12_1X12);
case V4L2_PIX_FMT_SRGGB12:
return (mbus_code == MEDIA_BUS_FMT_SRGGB12_1X12);
case V4L2_PIX_FMT_YUYV:
return (mbus_code == MEDIA_BUS_FMT_YUYV8_2X8);
case V4L2_PIX_FMT_YVYU:
return (mbus_code == MEDIA_BUS_FMT_YVYU8_2X8);
case V4L2_PIX_FMT_UYVY:
return (mbus_code == MEDIA_BUS_FMT_UYVY8_2X8);
case V4L2_PIX_FMT_VYUY:
return (mbus_code == MEDIA_BUS_FMT_VYUY8_2X8);
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV422P:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YVYU8_2X8:
return true;
default:
dev_dbg(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
case V4L2_PIX_FMT_RGB565:
return (mbus_code == MEDIA_BUS_FMT_RGB565_2X8_LE);
case V4L2_PIX_FMT_RGB565X:
return (mbus_code == MEDIA_BUS_FMT_RGB565_2X8_BE);
case V4L2_PIX_FMT_JPEG:
return (mbus_code == MEDIA_BUS_FMT_JPEG_1X8);
default:
dev_dbg(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat);
break;
}
return false;
}
int sun6i_csi_set_power(struct sun6i_csi *csi, bool enable)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
struct device *dev = sdev->dev;
struct regmap *regmap = sdev->regmap;
int ret;
if (!enable) {
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0);
clk_disable_unprepare(sdev->clk_ram);
if (of_device_is_compatible(dev->of_node,
"allwinner,sun50i-a64-csi"))
clk_rate_exclusive_put(sdev->clk_mod);
clk_disable_unprepare(sdev->clk_mod);
reset_control_assert(sdev->rstc_bus);
return 0;
}
ret = clk_prepare_enable(sdev->clk_mod);
if (ret) {
dev_err(sdev->dev, "Enable csi clk err %d\n", ret);
return ret;
}
if (of_device_is_compatible(dev->of_node, "allwinner,sun50i-a64-csi"))
clk_set_rate_exclusive(sdev->clk_mod, 300000000);
ret = clk_prepare_enable(sdev->clk_ram);
if (ret) {
dev_err(sdev->dev, "Enable clk_dram_csi clk err %d\n", ret);
goto clk_mod_disable;
}
ret = reset_control_deassert(sdev->rstc_bus);
if (ret) {
dev_err(sdev->dev, "reset err %d\n", ret);
goto clk_ram_disable;
}
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, CSI_EN_CSI_EN);
return 0;
clk_ram_disable:
clk_disable_unprepare(sdev->clk_ram);
clk_mod_disable:
if (of_device_is_compatible(dev->of_node, "allwinner,sun50i-a64-csi"))
clk_rate_exclusive_put(sdev->clk_mod);
clk_disable_unprepare(sdev->clk_mod);
return ret;
}
static enum csi_input_fmt get_csi_input_format(struct sun6i_csi_dev *sdev,
u32 mbus_code, u32 pixformat)
{
/* non-YUV */
if ((mbus_code & 0xF000) != 0x2000)
return CSI_INPUT_FORMAT_RAW;
switch (pixformat) {
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
return CSI_INPUT_FORMAT_RAW;
default:
break;
}
/* not support YUV420 input format yet */
dev_dbg(sdev->dev, "Select YUV422 as default input format of CSI.\n");
return CSI_INPUT_FORMAT_YUV422;
}
static enum csi_output_fmt get_csi_output_format(struct sun6i_csi_dev *sdev,
u32 pixformat, u32 field)
{
bool buf_interlaced = false;
if (field == V4L2_FIELD_INTERLACED
|| field == V4L2_FIELD_INTERLACED_TB
|| field == V4L2_FIELD_INTERLACED_BT)
buf_interlaced = true;
switch (pixformat) {
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SRGGB8:
return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
case V4L2_PIX_FMT_SBGGR10:
case V4L2_PIX_FMT_SGBRG10:
case V4L2_PIX_FMT_SGRBG10:
case V4L2_PIX_FMT_SRGGB10:
return buf_interlaced ? CSI_FRAME_RAW_10 : CSI_FIELD_RAW_10;
case V4L2_PIX_FMT_SBGGR12:
case V4L2_PIX_FMT_SGBRG12:
case V4L2_PIX_FMT_SGRBG12:
case V4L2_PIX_FMT_SRGGB12:
return buf_interlaced ? CSI_FRAME_RAW_12 : CSI_FIELD_RAW_12;
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
case V4L2_PIX_FMT_HM12:
return buf_interlaced ? CSI_FRAME_MB_YUV420 :
CSI_FIELD_MB_YUV420;
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
return buf_interlaced ? CSI_FRAME_UV_CB_YUV420 :
CSI_FIELD_UV_CB_YUV420;
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
return buf_interlaced ? CSI_FRAME_PLANAR_YUV420 :
CSI_FIELD_PLANAR_YUV420;
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
return buf_interlaced ? CSI_FRAME_UV_CB_YUV422 :
CSI_FIELD_UV_CB_YUV422;
case V4L2_PIX_FMT_YUV422P:
return buf_interlaced ? CSI_FRAME_PLANAR_YUV422 :
CSI_FIELD_PLANAR_YUV422;
case V4L2_PIX_FMT_RGB565:
case V4L2_PIX_FMT_RGB565X:
return buf_interlaced ? CSI_FRAME_RGB565 : CSI_FIELD_RGB565;
case V4L2_PIX_FMT_JPEG:
return buf_interlaced ? CSI_FRAME_RAW_8 : CSI_FIELD_RAW_8;
default:
dev_warn(sdev->dev, "Unsupported pixformat: 0x%x\n", pixformat);
break;
}
return CSI_FIELD_RAW_8;
}
static enum csi_input_seq get_csi_input_seq(struct sun6i_csi_dev *sdev,
u32 mbus_code, u32 pixformat)
{
/* Input sequence does not apply to non-YUV formats */
if ((mbus_code & 0xF000) != 0x2000)
return 0;
switch (pixformat) {
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YUV422P:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY8_1X16:
return CSI_INPUT_SEQ_UYVY;
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_VYUY8_1X16:
return CSI_INPUT_SEQ_VYUY;
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YUYV8_1X16:
return CSI_INPUT_SEQ_YUYV;
case MEDIA_BUS_FMT_YVYU8_1X16:
case MEDIA_BUS_FMT_YVYU8_2X8:
return CSI_INPUT_SEQ_YVYU;
default:
dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV61:
case V4L2_PIX_FMT_YVU420:
switch (mbus_code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
case MEDIA_BUS_FMT_UYVY8_1X16:
return CSI_INPUT_SEQ_VYUY;
case MEDIA_BUS_FMT_VYUY8_2X8:
case MEDIA_BUS_FMT_VYUY8_1X16:
return CSI_INPUT_SEQ_UYVY;
case MEDIA_BUS_FMT_YUYV8_2X8:
case MEDIA_BUS_FMT_YUYV8_1X16:
return CSI_INPUT_SEQ_YVYU;
case MEDIA_BUS_FMT_YVYU8_1X16:
case MEDIA_BUS_FMT_YVYU8_2X8:
return CSI_INPUT_SEQ_YUYV;
default:
dev_warn(sdev->dev, "Unsupported mbus code: 0x%x\n",
mbus_code);
break;
}
break;
case V4L2_PIX_FMT_YUYV:
return CSI_INPUT_SEQ_YUYV;
default:
dev_warn(sdev->dev, "Unsupported pixformat: 0x%x, defaulting to YUYV\n",
pixformat);
break;
}
return CSI_INPUT_SEQ_YUYV;
}
static void sun6i_csi_setup_bus(struct sun6i_csi_dev *sdev)
{
struct v4l2_fwnode_endpoint *endpoint = &sdev->csi.v4l2_ep;
struct sun6i_csi *csi = &sdev->csi;
unsigned char bus_width;
u32 flags;
u32 cfg;
bool input_interlaced = false;
if (csi->config.field == V4L2_FIELD_INTERLACED
|| csi->config.field == V4L2_FIELD_INTERLACED_TB
|| csi->config.field == V4L2_FIELD_INTERLACED_BT)
input_interlaced = true;
bus_width = endpoint->bus.parallel.bus_width;
regmap_read(sdev->regmap, CSI_IF_CFG_REG, &cfg);
cfg &= ~(CSI_IF_CFG_CSI_IF_MASK | CSI_IF_CFG_MIPI_IF_MASK |
CSI_IF_CFG_IF_DATA_WIDTH_MASK |
CSI_IF_CFG_CLK_POL_MASK | CSI_IF_CFG_VREF_POL_MASK |
CSI_IF_CFG_HREF_POL_MASK | CSI_IF_CFG_FIELD_MASK |
CSI_IF_CFG_SRC_TYPE_MASK);
if (input_interlaced)
cfg |= CSI_IF_CFG_SRC_TYPE_INTERLACED;
else
cfg |= CSI_IF_CFG_SRC_TYPE_PROGRESSED;
switch (endpoint->bus_type) {
case V4L2_MBUS_PARALLEL:
cfg |= CSI_IF_CFG_MIPI_IF_CSI;
flags = endpoint->bus.parallel.flags;
cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_YUV422_16BIT :
CSI_IF_CFG_CSI_IF_YUV422_INTLV;
if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
cfg |= CSI_IF_CFG_FIELD_POSITIVE;
if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
cfg |= CSI_IF_CFG_VREF_POL_POSITIVE;
if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
cfg |= CSI_IF_CFG_HREF_POL_POSITIVE;
if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
break;
case V4L2_MBUS_BT656:
cfg |= CSI_IF_CFG_MIPI_IF_CSI;
flags = endpoint->bus.parallel.flags;
cfg |= (bus_width == 16) ? CSI_IF_CFG_CSI_IF_BT1120 :
CSI_IF_CFG_CSI_IF_BT656;
if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
cfg |= CSI_IF_CFG_FIELD_POSITIVE;
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
break;
default:
dev_warn(sdev->dev, "Unsupported bus type: %d\n",
endpoint->bus_type);
break;
}
switch (bus_width) {
case 8:
cfg |= CSI_IF_CFG_IF_DATA_WIDTH_8BIT;
break;
case 10:
cfg |= CSI_IF_CFG_IF_DATA_WIDTH_10BIT;
break;
case 12:
cfg |= CSI_IF_CFG_IF_DATA_WIDTH_12BIT;
break;
case 16: /* No need to configure DATA_WIDTH for 16bit */
break;
default:
dev_warn(sdev->dev, "Unsupported bus width: %u\n", bus_width);
break;
}
regmap_write(sdev->regmap, CSI_IF_CFG_REG, cfg);
}
static void sun6i_csi_set_format(struct sun6i_csi_dev *sdev)
{
struct sun6i_csi *csi = &sdev->csi;
u32 cfg;
u32 val;
regmap_read(sdev->regmap, CSI_CH_CFG_REG, &cfg);
cfg &= ~(CSI_CH_CFG_INPUT_FMT_MASK |
CSI_CH_CFG_OUTPUT_FMT_MASK | CSI_CH_CFG_VFLIP_EN |
CSI_CH_CFG_HFLIP_EN | CSI_CH_CFG_FIELD_SEL_MASK |
CSI_CH_CFG_INPUT_SEQ_MASK);
val = get_csi_input_format(sdev, csi->config.code,
csi->config.pixelformat);
cfg |= CSI_CH_CFG_INPUT_FMT(val);
val = get_csi_output_format(sdev, csi->config.pixelformat,
csi->config.field);
cfg |= CSI_CH_CFG_OUTPUT_FMT(val);
val = get_csi_input_seq(sdev, csi->config.code,
csi->config.pixelformat);
cfg |= CSI_CH_CFG_INPUT_SEQ(val);
if (csi->config.field == V4L2_FIELD_TOP)
cfg |= CSI_CH_CFG_FIELD_SEL_FIELD0;
else if (csi->config.field == V4L2_FIELD_BOTTOM)
cfg |= CSI_CH_CFG_FIELD_SEL_FIELD1;
else
cfg |= CSI_CH_CFG_FIELD_SEL_BOTH;
regmap_write(sdev->regmap, CSI_CH_CFG_REG, cfg);
}
static void sun6i_csi_set_window(struct sun6i_csi_dev *sdev)
{
struct sun6i_csi_config *config = &sdev->csi.config;
u32 bytesperline_y;
u32 bytesperline_c;
int *planar_offset = sdev->planar_offset;
u32 width = config->width;
u32 height = config->height;
u32 hor_len = width;
switch (config->pixelformat) {
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
dev_dbg(sdev->dev,
"Horizontal length should be 2 times of width for packed YUV formats!\n");
hor_len = width * 2;
break;
default:
break;
}
regmap_write(sdev->regmap, CSI_CH_HSIZE_REG,
CSI_CH_HSIZE_HOR_LEN(hor_len) |
CSI_CH_HSIZE_HOR_START(0));
regmap_write(sdev->regmap, CSI_CH_VSIZE_REG,
CSI_CH_VSIZE_VER_LEN(height) |
CSI_CH_VSIZE_VER_START(0));
planar_offset[0] = 0;
switch (config->pixelformat) {
case V4L2_PIX_FMT_HM12:
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
bytesperline_y = width;
bytesperline_c = width;
planar_offset[1] = bytesperline_y * height;
planar_offset[2] = -1;
break;
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_YVU420:
bytesperline_y = width;
bytesperline_c = width / 2;
planar_offset[1] = bytesperline_y * height;
planar_offset[2] = planar_offset[1] +
bytesperline_c * height / 2;
break;
case V4L2_PIX_FMT_YUV422P:
bytesperline_y = width;
bytesperline_c = width / 2;
planar_offset[1] = bytesperline_y * height;
planar_offset[2] = planar_offset[1] +
bytesperline_c * height;
break;
default: /* raw */
dev_dbg(sdev->dev,
"Calculating pixelformat(0x%x)'s bytesperline as a packed format\n",
config->pixelformat);
bytesperline_y = (sun6i_csi_get_bpp(config->pixelformat) *
config->width) / 8;
bytesperline_c = 0;
planar_offset[1] = -1;
planar_offset[2] = -1;
break;
}
regmap_write(sdev->regmap, CSI_CH_BUF_LEN_REG,
CSI_CH_BUF_LEN_BUF_LEN_C(bytesperline_c) |
CSI_CH_BUF_LEN_BUF_LEN_Y(bytesperline_y));
}
int sun6i_csi_update_config(struct sun6i_csi *csi,
struct sun6i_csi_config *config)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
if (!config)
return -EINVAL;
memcpy(&csi->config, config, sizeof(csi->config));
sun6i_csi_setup_bus(sdev);
sun6i_csi_set_format(sdev);
sun6i_csi_set_window(sdev);
return 0;
}
void sun6i_csi_update_buf_addr(struct sun6i_csi *csi, dma_addr_t addr)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
regmap_write(sdev->regmap, CSI_CH_F0_BUFA_REG,
(addr + sdev->planar_offset[0]) >> 2);
if (sdev->planar_offset[1] != -1)
regmap_write(sdev->regmap, CSI_CH_F1_BUFA_REG,
(addr + sdev->planar_offset[1]) >> 2);
if (sdev->planar_offset[2] != -1)
regmap_write(sdev->regmap, CSI_CH_F2_BUFA_REG,
(addr + sdev->planar_offset[2]) >> 2);
}
void sun6i_csi_set_stream(struct sun6i_csi *csi, bool enable)
{
struct sun6i_csi_dev *sdev = sun6i_csi_to_dev(csi);
struct regmap *regmap = sdev->regmap;
if (!enable) {
regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON, 0);
regmap_write(regmap, CSI_CH_INT_EN_REG, 0);
return;
}
regmap_write(regmap, CSI_CH_INT_STA_REG, 0xFF);
regmap_write(regmap, CSI_CH_INT_EN_REG,
CSI_CH_INT_EN_HB_OF_INT_EN |
CSI_CH_INT_EN_FIFO2_OF_INT_EN |
CSI_CH_INT_EN_FIFO1_OF_INT_EN |
CSI_CH_INT_EN_FIFO0_OF_INT_EN |
CSI_CH_INT_EN_FD_INT_EN |
CSI_CH_INT_EN_CD_INT_EN);
regmap_update_bits(regmap, CSI_CAP_REG, CSI_CAP_CH0_VCAP_ON,
CSI_CAP_CH0_VCAP_ON);
}
/* -----------------------------------------------------------------------------
* Media Controller and V4L2
*/
static int sun6i_csi_link_entity(struct sun6i_csi *csi,
struct media_entity *entity,
struct fwnode_handle *fwnode)
{
struct media_entity *sink;
struct media_pad *sink_pad;
int src_pad_index;
int ret;
ret = media_entity_get_fwnode_pad(entity, fwnode, MEDIA_PAD_FL_SOURCE);
if (ret < 0) {
dev_err(csi->dev, "%s: no source pad in external entity %s\n",
__func__, entity->name);
return -EINVAL;
}
src_pad_index = ret;
sink = &csi->video.vdev.entity;
sink_pad = &csi->video.pad;
dev_dbg(csi->dev, "creating %s:%u -> %s:%u link\n",
entity->name, src_pad_index, sink->name, sink_pad->index);
ret = media_create_pad_link(entity, src_pad_index, sink,
sink_pad->index,
MEDIA_LNK_FL_ENABLED |
MEDIA_LNK_FL_IMMUTABLE);
if (ret < 0) {
dev_err(csi->dev, "failed to create %s:%u -> %s:%u link\n",
entity->name, src_pad_index,
sink->name, sink_pad->index);
return ret;
}
return 0;
}
static int sun6i_subdev_notify_complete(struct v4l2_async_notifier *notifier)
{
struct sun6i_csi *csi = container_of(notifier, struct sun6i_csi,
notifier);
struct v4l2_device *v4l2_dev = &csi->v4l2_dev;
struct v4l2_subdev *sd;
int ret;
dev_dbg(csi->dev, "notify complete, all subdevs registered\n");
sd = list_first_entry(&v4l2_dev->subdevs, struct v4l2_subdev, list);
if (!sd)
return -EINVAL;
ret = sun6i_csi_link_entity(csi, &sd->entity, sd->fwnode);
if (ret < 0)
return ret;
ret = v4l2_device_register_subdev_nodes(&csi->v4l2_dev);
if (ret < 0)
return ret;
return media_device_register(&csi->media_dev);
}
static const struct v4l2_async_notifier_operations sun6i_csi_async_ops = {
.complete = sun6i_subdev_notify_complete,
};
static int sun6i_csi_fwnode_parse(struct device *dev,
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd)
{
struct sun6i_csi *csi = dev_get_drvdata(dev);
if (vep->base.port || vep->base.id) {
dev_warn(dev, "Only support a single port with one endpoint\n");
return -ENOTCONN;
}
switch (vep->bus_type) {
case V4L2_MBUS_PARALLEL:
case V4L2_MBUS_BT656:
csi->v4l2_ep = *vep;
return 0;
default:
dev_err(dev, "Unsupported media bus type\n");
return -ENOTCONN;
}
}
static void sun6i_csi_v4l2_cleanup(struct sun6i_csi *csi)
{
media_device_unregister(&csi->media_dev);
v4l2_async_notifier_unregister(&csi->notifier);
v4l2_async_notifier_cleanup(&csi->notifier);
sun6i_video_cleanup(&csi->video);
v4l2_device_unregister(&csi->v4l2_dev);
v4l2_ctrl_handler_free(&csi->ctrl_handler);
media_device_cleanup(&csi->media_dev);
}
static int sun6i_csi_v4l2_init(struct sun6i_csi *csi)
{
int ret;
csi->media_dev.dev = csi->dev;
strscpy(csi->media_dev.model, "Allwinner Video Capture Device",
sizeof(csi->media_dev.model));
csi->media_dev.hw_revision = 0;
media_device_init(&csi->media_dev);
v4l2_async_notifier_init(&csi->notifier);
ret = v4l2_ctrl_handler_init(&csi->ctrl_handler, 0);
if (ret) {
dev_err(csi->dev, "V4L2 controls handler init failed (%d)\n",
ret);
goto clean_media;
}
csi->v4l2_dev.mdev = &csi->media_dev;
csi->v4l2_dev.ctrl_handler = &csi->ctrl_handler;
ret = v4l2_device_register(csi->dev, &csi->v4l2_dev);
if (ret) {
dev_err(csi->dev, "V4L2 device registration failed (%d)\n",
ret);
goto free_ctrl;
}
ret = sun6i_video_init(&csi->video, csi, "sun6i-csi");
if (ret)
goto unreg_v4l2;
ret = v4l2_async_notifier_parse_fwnode_endpoints(csi->dev,
&csi->notifier,
sizeof(struct v4l2_async_subdev),
sun6i_csi_fwnode_parse);
if (ret)
goto clean_video;
csi->notifier.ops = &sun6i_csi_async_ops;
ret = v4l2_async_notifier_register(&csi->v4l2_dev, &csi->notifier);
if (ret) {
dev_err(csi->dev, "notifier registration failed\n");
goto clean_video;
}
return 0;
clean_video:
sun6i_video_cleanup(&csi->video);
unreg_v4l2:
v4l2_device_unregister(&csi->v4l2_dev);
free_ctrl:
v4l2_ctrl_handler_free(&csi->ctrl_handler);
clean_media:
v4l2_async_notifier_cleanup(&csi->notifier);
media_device_cleanup(&csi->media_dev);
return ret;
}
/* -----------------------------------------------------------------------------
* Resources and IRQ
*/
static irqreturn_t sun6i_csi_isr(int irq, void *dev_id)
{
struct sun6i_csi_dev *sdev = (struct sun6i_csi_dev *)dev_id;
struct regmap *regmap = sdev->regmap;
u32 status;
regmap_read(regmap, CSI_CH_INT_STA_REG, &status);
if (!(status & 0xFF))
return IRQ_NONE;
if ((status & CSI_CH_INT_STA_FIFO0_OF_PD) ||
(status & CSI_CH_INT_STA_FIFO1_OF_PD) ||
(status & CSI_CH_INT_STA_FIFO2_OF_PD) ||
(status & CSI_CH_INT_STA_HB_OF_PD)) {
regmap_write(regmap, CSI_CH_INT_STA_REG, status);
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN, 0);
regmap_update_bits(regmap, CSI_EN_REG, CSI_EN_CSI_EN,
CSI_EN_CSI_EN);
return IRQ_HANDLED;
}
if (status & CSI_CH_INT_STA_FD_PD)
sun6i_video_frame_done(&sdev->csi.video);
regmap_write(regmap, CSI_CH_INT_STA_REG, status);
return IRQ_HANDLED;
}
static const struct regmap_config sun6i_csi_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = 0x9c,
};
static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,
struct platform_device *pdev)
{
struct resource *res;
void __iomem *io_base;
int ret;
int irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
io_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(io_base))
return PTR_ERR(io_base);
sdev->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "bus", io_base,
&sun6i_csi_regmap_config);
if (IS_ERR(sdev->regmap)) {
dev_err(&pdev->dev, "Failed to init register map\n");
return PTR_ERR(sdev->regmap);
}
sdev->clk_mod = devm_clk_get(&pdev->dev, "mod");
if (IS_ERR(sdev->clk_mod)) {
dev_err(&pdev->dev, "Unable to acquire csi clock\n");
return PTR_ERR(sdev->clk_mod);
}
sdev->clk_ram = devm_clk_get(&pdev->dev, "ram");
if (IS_ERR(sdev->clk_ram)) {
dev_err(&pdev->dev, "Unable to acquire dram-csi clock\n");
return PTR_ERR(sdev->clk_ram);
}
sdev->rstc_bus = devm_reset_control_get_shared(&pdev->dev, NULL);
if (IS_ERR(sdev->rstc_bus)) {
dev_err(&pdev->dev, "Cannot get reset controller\n");
return PTR_ERR(sdev->rstc_bus);
}
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return -ENXIO;
ret = devm_request_irq(&pdev->dev, irq, sun6i_csi_isr, 0, MODULE_NAME,
sdev);
if (ret) {
dev_err(&pdev->dev, "Cannot request csi IRQ\n");
return ret;
}
return 0;
}
/*
* PHYS_OFFSET isn't available on all architectures. In order to
* accommodate for COMPILE_TEST, let's define it to something dumb.
*/
#if defined(CONFIG_COMPILE_TEST) && !defined(PHYS_OFFSET)
#define PHYS_OFFSET 0
#endif
static int sun6i_csi_probe(struct platform_device *pdev)
{
struct sun6i_csi_dev *sdev;
int ret;
sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
if (!sdev)
return -ENOMEM;
sdev->dev = &pdev->dev;
/* The DMA bus has the memory mapped at 0 */
sdev->dev->dma_pfn_offset = PHYS_OFFSET >> PAGE_SHIFT;
ret = sun6i_csi_resource_request(sdev, pdev);
if (ret)
return ret;
platform_set_drvdata(pdev, sdev);
sdev->csi.dev = &pdev->dev;
return sun6i_csi_v4l2_init(&sdev->csi);
}
static int sun6i_csi_remove(struct platform_device *pdev)
{
struct sun6i_csi_dev *sdev = platform_get_drvdata(pdev);
sun6i_csi_v4l2_cleanup(&sdev->csi);
return 0;
}
static const struct of_device_id sun6i_csi_of_match[] = {
{ .compatible = "allwinner,sun6i-a31-csi", },
{ .compatible = "allwinner,sun8i-a83t-csi", },
{ .compatible = "allwinner,sun8i-h3-csi", },
{ .compatible = "allwinner,sun8i-v3s-csi", },
{ .compatible = "allwinner,sun50i-a64-csi", },
{},
};
MODULE_DEVICE_TABLE(of, sun6i_csi_of_match);
static struct platform_driver sun6i_csi_platform_driver = {
.probe = sun6i_csi_probe,
.remove = sun6i_csi_remove,
.driver = {
.name = MODULE_NAME,
.of_match_table = of_match_ptr(sun6i_csi_of_match),
},
};
module_platform_driver(sun6i_csi_platform_driver);
MODULE_DESCRIPTION("Allwinner V3s Camera Sensor Interface driver");
MODULE_AUTHOR("Yong Deng <yong.deng@magewell.com>");
MODULE_LICENSE("GPL");
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