// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
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*
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* Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
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* Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
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*/
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#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
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#include <linux/bug.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/version.h>
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#include <media/media-device.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-ioctl.h>
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#include <media/videobuf2-v4l2.h>
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#include <media/videobuf2-dma-contig.h>
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#include "camif-core.h"
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|
static char *camif_clocks[CLK_MAX_NUM] = {
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/* HCLK CAMIF clock */
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[CLK_GATE] = "camif",
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/* CAMIF / external camera sensor master clock */
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[CLK_CAM] = "camera",
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};
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static const struct camif_fmt camif_formats[] = {
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{
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.fourcc = V4L2_PIX_FMT_YUV422P,
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.depth = 16,
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.ybpp = 1,
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.color = IMG_FMT_YCBCR422P,
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.colplanes = 3,
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.flags = FMT_FL_S3C24XX_CODEC |
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FMT_FL_S3C64XX,
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}, {
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.fourcc = V4L2_PIX_FMT_YUV420,
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.depth = 12,
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.ybpp = 1,
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.color = IMG_FMT_YCBCR420,
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.colplanes = 3,
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.flags = FMT_FL_S3C24XX_CODEC |
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FMT_FL_S3C64XX,
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}, {
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.fourcc = V4L2_PIX_FMT_YVU420,
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.depth = 12,
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.ybpp = 1,
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.color = IMG_FMT_YCRCB420,
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.colplanes = 3,
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.flags = FMT_FL_S3C24XX_CODEC |
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FMT_FL_S3C64XX,
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}, {
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.fourcc = V4L2_PIX_FMT_RGB565X,
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.depth = 16,
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.ybpp = 2,
|
.color = IMG_FMT_RGB565,
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.colplanes = 1,
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.flags = FMT_FL_S3C24XX_PREVIEW |
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FMT_FL_S3C64XX,
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}, {
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.fourcc = V4L2_PIX_FMT_RGB32,
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.depth = 32,
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.ybpp = 4,
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.color = IMG_FMT_XRGB8888,
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.colplanes = 1,
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.flags = FMT_FL_S3C24XX_PREVIEW |
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FMT_FL_S3C64XX,
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}, {
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.fourcc = V4L2_PIX_FMT_BGR666,
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.depth = 32,
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.ybpp = 4,
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.color = IMG_FMT_RGB666,
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.colplanes = 1,
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.flags = FMT_FL_S3C64XX,
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}
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};
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/**
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* s3c_camif_find_format() - lookup camif color format by fourcc or an index
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* @vp: video path (DMA) description (codec/preview)
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* @pixelformat: fourcc to match, ignored if null
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* @index: index to the camif_formats array, ignored if negative
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*/
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const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
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const u32 *pixelformat,
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int index)
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{
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const struct camif_fmt *fmt, *def_fmt = NULL;
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unsigned int i;
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int id = 0;
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if (index >= (int)ARRAY_SIZE(camif_formats))
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return NULL;
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for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
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fmt = &camif_formats[i];
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if (vp && !(vp->fmt_flags & fmt->flags))
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continue;
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if (pixelformat && fmt->fourcc == *pixelformat)
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return fmt;
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if (index == id)
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def_fmt = fmt;
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id++;
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}
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return def_fmt;
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}
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static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
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{
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unsigned int sh = 6;
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if (src >= 64 * tar)
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return -EINVAL;
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while (sh--) {
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unsigned int tmp = 1 << sh;
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if (src >= tar * tmp) {
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*shift = sh, *ratio = tmp;
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return 0;
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}
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}
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*shift = 0, *ratio = 1;
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return 0;
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}
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int s3c_camif_get_scaler_config(struct camif_vp *vp,
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struct camif_scaler *scaler)
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{
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struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
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int source_x = camif_crop->width;
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int source_y = camif_crop->height;
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int target_x = vp->out_frame.rect.width;
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int target_y = vp->out_frame.rect.height;
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int ret;
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if (vp->rotation == 90 || vp->rotation == 270)
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swap(target_x, target_y);
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ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
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&scaler->h_shift);
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if (ret < 0)
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return ret;
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ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
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&scaler->v_shift);
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if (ret < 0)
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return ret;
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scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
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scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
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scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
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scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
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scaler->scaleup_h = (target_x >= source_x);
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scaler->scaleup_v = (target_y >= source_y);
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scaler->copy = 0;
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pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
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scaler->pre_h_ratio, scaler->h_shift,
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scaler->pre_v_ratio, scaler->v_shift);
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pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
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source_x, source_y, target_x, target_y,
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scaler->scaleup_h, scaler->scaleup_v);
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return 0;
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}
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static int camif_register_sensor(struct camif_dev *camif)
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{
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struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
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struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
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struct i2c_adapter *adapter;
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struct v4l2_subdev_format format;
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struct v4l2_subdev *sd;
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int ret;
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camif->sensor.sd = NULL;
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if (sensor->i2c_board_info.addr == 0)
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return -EINVAL;
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adapter = i2c_get_adapter(sensor->i2c_bus_num);
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if (adapter == NULL) {
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v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
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sensor->i2c_bus_num);
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return -EPROBE_DEFER;
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}
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sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
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&sensor->i2c_board_info, NULL);
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if (sd == NULL) {
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i2c_put_adapter(adapter);
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v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
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sensor->i2c_board_info.type);
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return -EPROBE_DEFER;
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}
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camif->sensor.sd = sd;
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v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
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/* Get initial pixel format and set it at the camif sink pad */
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format.pad = 0;
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format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
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ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
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if (ret < 0)
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return 0;
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format.pad = CAMIF_SD_PAD_SINK;
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v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
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v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
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format.format.width, format.format.height,
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format.format.code);
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return 0;
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}
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static void camif_unregister_sensor(struct camif_dev *camif)
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{
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struct v4l2_subdev *sd = camif->sensor.sd;
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struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
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struct i2c_adapter *adapter;
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|
if (client == NULL)
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return;
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adapter = client->adapter;
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v4l2_device_unregister_subdev(sd);
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camif->sensor.sd = NULL;
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i2c_unregister_device(client);
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i2c_put_adapter(adapter);
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}
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static int camif_create_media_links(struct camif_dev *camif)
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{
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int i, ret;
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ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
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&camif->subdev.entity, CAMIF_SD_PAD_SINK,
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MEDIA_LNK_FL_IMMUTABLE |
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MEDIA_LNK_FL_ENABLED);
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if (ret)
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return ret;
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for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
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ret = media_create_pad_link(&camif->subdev.entity, i,
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&camif->vp[i - 1].vdev.entity, 0,
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MEDIA_LNK_FL_IMMUTABLE |
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MEDIA_LNK_FL_ENABLED);
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}
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return ret;
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}
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static int camif_register_video_nodes(struct camif_dev *camif)
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{
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int ret = s3c_camif_register_video_node(camif, VP_CODEC);
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if (ret < 0)
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return ret;
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return s3c_camif_register_video_node(camif, VP_PREVIEW);
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}
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static void camif_unregister_video_nodes(struct camif_dev *camif)
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{
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s3c_camif_unregister_video_node(camif, VP_CODEC);
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s3c_camif_unregister_video_node(camif, VP_PREVIEW);
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}
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static void camif_unregister_media_entities(struct camif_dev *camif)
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{
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camif_unregister_video_nodes(camif);
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camif_unregister_sensor(camif);
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s3c_camif_unregister_subdev(camif);
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}
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/*
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* Media device
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*/
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static int camif_media_dev_init(struct camif_dev *camif)
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{
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struct media_device *md = &camif->media_dev;
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struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
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unsigned int ip_rev = camif->variant->ip_revision;
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int ret;
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memset(md, 0, sizeof(*md));
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snprintf(md->model, sizeof(md->model), "Samsung S3C%s CAMIF",
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ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
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strscpy(md->bus_info, "platform", sizeof(md->bus_info));
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md->hw_revision = ip_rev;
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md->dev = camif->dev;
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strscpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
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v4l2_dev->mdev = md;
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media_device_init(md);
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ret = v4l2_device_register(camif->dev, v4l2_dev);
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if (ret < 0)
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return ret;
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|
return ret;
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}
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static void camif_clk_put(struct camif_dev *camif)
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{
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int i;
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for (i = 0; i < CLK_MAX_NUM; i++) {
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if (IS_ERR(camif->clock[i]))
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continue;
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clk_unprepare(camif->clock[i]);
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clk_put(camif->clock[i]);
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camif->clock[i] = ERR_PTR(-EINVAL);
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}
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}
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static int camif_clk_get(struct camif_dev *camif)
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{
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int ret, i;
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|
for (i = 1; i < CLK_MAX_NUM; i++)
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camif->clock[i] = ERR_PTR(-EINVAL);
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|
for (i = 0; i < CLK_MAX_NUM; i++) {
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camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
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if (IS_ERR(camif->clock[i])) {
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ret = PTR_ERR(camif->clock[i]);
|
goto err;
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}
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ret = clk_prepare(camif->clock[i]);
|
if (ret < 0) {
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clk_put(camif->clock[i]);
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camif->clock[i] = NULL;
|
goto err;
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}
|
}
|
return 0;
|
err:
|
camif_clk_put(camif);
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dev_err(camif->dev, "failed to get clock: %s\n",
|
camif_clocks[i]);
|
return ret;
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}
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/*
|
* The CAMIF device has two relatively independent data processing paths
|
* that can source data from memory or the common camera input frontend.
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* Register interrupts for each data processing path (camif_vp).
|
*/
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static int camif_request_irqs(struct platform_device *pdev,
|
struct camif_dev *camif)
|
{
|
int irq, ret, i;
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|
for (i = 0; i < CAMIF_VP_NUM; i++) {
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struct camif_vp *vp = &camif->vp[i];
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|
init_waitqueue_head(&vp->irq_queue);
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|
irq = platform_get_irq(pdev, i);
|
if (irq <= 0)
|
return -ENXIO;
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|
ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
|
0, dev_name(&pdev->dev), vp);
|
if (ret < 0) {
|
dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
|
break;
|
}
|
}
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|
return ret;
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}
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|
static int s3c_camif_probe(struct platform_device *pdev)
|
{
|
struct device *dev = &pdev->dev;
|
struct s3c_camif_plat_data *pdata = dev->platform_data;
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struct s3c_camif_drvdata *drvdata;
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struct camif_dev *camif;
|
struct resource *mres;
|
int ret = 0;
|
|
camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
|
if (!camif)
|
return -ENOMEM;
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|
spin_lock_init(&camif->slock);
|
mutex_init(&camif->lock);
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|
camif->dev = dev;
|
|
if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
|
dev_err(dev, "wrong platform data\n");
|
return -EINVAL;
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}
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camif->pdata = *pdata;
|
drvdata = (void *)platform_get_device_id(pdev)->driver_data;
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camif->variant = drvdata->variant;
|
|
mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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|
camif->io_base = devm_ioremap_resource(dev, mres);
|
if (IS_ERR(camif->io_base))
|
return PTR_ERR(camif->io_base);
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|
ret = camif_request_irqs(pdev, camif);
|
if (ret < 0)
|
return ret;
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|
ret = pdata->gpio_get();
|
if (ret < 0)
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return ret;
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ret = s3c_camif_create_subdev(camif);
|
if (ret < 0)
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goto err_sd;
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ret = camif_clk_get(camif);
|
if (ret < 0)
|
goto err_clk;
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|
platform_set_drvdata(pdev, camif);
|
clk_set_rate(camif->clock[CLK_CAM],
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camif->pdata.sensor.clock_frequency);
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|
dev_info(dev, "sensor clock frequency: %lu\n",
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clk_get_rate(camif->clock[CLK_CAM]));
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/*
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* Set initial pixel format, resolution and crop rectangle.
|
* Must be done before a sensor subdev is registered as some
|
* settings are overrode with values from sensor subdev.
|
*/
|
s3c_camif_set_defaults(camif);
|
|
pm_runtime_enable(dev);
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|
ret = pm_runtime_get_sync(dev);
|
if (ret < 0)
|
goto err_pm;
|
|
ret = camif_media_dev_init(camif);
|
if (ret < 0)
|
goto err_pm;
|
|
ret = camif_register_sensor(camif);
|
if (ret < 0)
|
goto err_sens;
|
|
ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
|
if (ret < 0)
|
goto err_sens;
|
|
ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
|
if (ret < 0)
|
goto err_sens;
|
|
ret = camif_register_video_nodes(camif);
|
if (ret < 0)
|
goto err_sens;
|
|
ret = camif_create_media_links(camif);
|
if (ret < 0)
|
goto err_sens;
|
|
ret = media_device_register(&camif->media_dev);
|
if (ret < 0)
|
goto err_sens;
|
|
pm_runtime_put(dev);
|
return 0;
|
|
err_sens:
|
v4l2_device_unregister(&camif->v4l2_dev);
|
media_device_unregister(&camif->media_dev);
|
media_device_cleanup(&camif->media_dev);
|
camif_unregister_media_entities(camif);
|
err_pm:
|
pm_runtime_put(dev);
|
pm_runtime_disable(dev);
|
camif_clk_put(camif);
|
err_clk:
|
s3c_camif_unregister_subdev(camif);
|
err_sd:
|
pdata->gpio_put();
|
return ret;
|
}
|
|
static int s3c_camif_remove(struct platform_device *pdev)
|
{
|
struct camif_dev *camif = platform_get_drvdata(pdev);
|
struct s3c_camif_plat_data *pdata = &camif->pdata;
|
|
media_device_unregister(&camif->media_dev);
|
media_device_cleanup(&camif->media_dev);
|
camif_unregister_media_entities(camif);
|
v4l2_device_unregister(&camif->v4l2_dev);
|
|
pm_runtime_disable(&pdev->dev);
|
camif_clk_put(camif);
|
pdata->gpio_put();
|
|
return 0;
|
}
|
|
static int s3c_camif_runtime_resume(struct device *dev)
|
{
|
struct camif_dev *camif = dev_get_drvdata(dev);
|
|
clk_enable(camif->clock[CLK_GATE]);
|
/* null op on s3c244x */
|
clk_enable(camif->clock[CLK_CAM]);
|
return 0;
|
}
|
|
static int s3c_camif_runtime_suspend(struct device *dev)
|
{
|
struct camif_dev *camif = dev_get_drvdata(dev);
|
|
/* null op on s3c244x */
|
clk_disable(camif->clock[CLK_CAM]);
|
|
clk_disable(camif->clock[CLK_GATE]);
|
return 0;
|
}
|
|
static const struct s3c_camif_variant s3c244x_camif_variant = {
|
.vp_pix_limits = {
|
[VP_CODEC] = {
|
.max_out_width = 4096,
|
.max_sc_out_width = 2048,
|
.out_width_align = 16,
|
.min_out_width = 16,
|
.max_height = 4096,
|
},
|
[VP_PREVIEW] = {
|
.max_out_width = 640,
|
.max_sc_out_width = 640,
|
.out_width_align = 16,
|
.min_out_width = 16,
|
.max_height = 480,
|
}
|
},
|
.pix_limits = {
|
.win_hor_offset_align = 8,
|
},
|
.ip_revision = S3C244X_CAMIF_IP_REV,
|
};
|
|
static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
|
.variant = &s3c244x_camif_variant,
|
.bus_clk_freq = 24000000UL,
|
};
|
|
static const struct s3c_camif_variant s3c6410_camif_variant = {
|
.vp_pix_limits = {
|
[VP_CODEC] = {
|
.max_out_width = 4096,
|
.max_sc_out_width = 2048,
|
.out_width_align = 16,
|
.min_out_width = 16,
|
.max_height = 4096,
|
},
|
[VP_PREVIEW] = {
|
.max_out_width = 4096,
|
.max_sc_out_width = 720,
|
.out_width_align = 16,
|
.min_out_width = 16,
|
.max_height = 4096,
|
}
|
},
|
.pix_limits = {
|
.win_hor_offset_align = 8,
|
},
|
.ip_revision = S3C6410_CAMIF_IP_REV,
|
.has_img_effect = 1,
|
.vp_offset = 0x20,
|
};
|
|
static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
|
.variant = &s3c6410_camif_variant,
|
.bus_clk_freq = 133000000UL,
|
};
|
|
static const struct platform_device_id s3c_camif_driver_ids[] = {
|
{
|
.name = "s3c2440-camif",
|
.driver_data = (unsigned long)&s3c244x_camif_drvdata,
|
}, {
|
.name = "s3c6410-camif",
|
.driver_data = (unsigned long)&s3c6410_camif_drvdata,
|
},
|
{ /* sentinel */ },
|
};
|
MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
|
|
static const struct dev_pm_ops s3c_camif_pm_ops = {
|
.runtime_suspend = s3c_camif_runtime_suspend,
|
.runtime_resume = s3c_camif_runtime_resume,
|
};
|
|
static struct platform_driver s3c_camif_driver = {
|
.probe = s3c_camif_probe,
|
.remove = s3c_camif_remove,
|
.id_table = s3c_camif_driver_ids,
|
.driver = {
|
.name = S3C_CAMIF_DRIVER_NAME,
|
.pm = &s3c_camif_pm_ops,
|
}
|
};
|
|
module_platform_driver(s3c_camif_driver);
|
|
MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
|
MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
|
MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
|
MODULE_LICENSE("GPL");
|
