| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver |
| * |
| * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com> |
| * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com> |
| */ |
| #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__ |
| |
| #include <linux/bug.h> |
| #include <linux/clk.h> |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/errno.h> |
| #include <linux/gpio.h> |
| #include <linux/i2c.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/slab.h> |
| #include <linux/types.h> |
| |
| #include <media/media-device.h> |
| #include <media/v4l2-ctrls.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/videobuf2-v4l2.h> |
| #include <media/videobuf2-dma-contig.h> |
| |
| #include "camif-core.h" |
| |
| static char *camif_clocks[CLK_MAX_NUM] = { |
| /* HCLK CAMIF clock */ |
| [CLK_GATE] = "camif", |
| /* CAMIF / external camera sensor master clock */ |
| [CLK_CAM] = "camera", |
| }; |
| |
| static const struct camif_fmt camif_formats[] = { |
| { |
| .fourcc = V4L2_PIX_FMT_YUV422P, |
| .depth = 16, |
| .ybpp = 1, |
| .color = IMG_FMT_YCBCR422P, |
| .colplanes = 3, |
| .flags = FMT_FL_S3C24XX_CODEC | |
| FMT_FL_S3C64XX, |
| }, { |
| .fourcc = V4L2_PIX_FMT_YUV420, |
| .depth = 12, |
| .ybpp = 1, |
| .color = IMG_FMT_YCBCR420, |
| .colplanes = 3, |
| .flags = FMT_FL_S3C24XX_CODEC | |
| FMT_FL_S3C64XX, |
| }, { |
| .fourcc = V4L2_PIX_FMT_YVU420, |
| .depth = 12, |
| .ybpp = 1, |
| .color = IMG_FMT_YCRCB420, |
| .colplanes = 3, |
| .flags = FMT_FL_S3C24XX_CODEC | |
| FMT_FL_S3C64XX, |
| }, { |
| .fourcc = V4L2_PIX_FMT_RGB565X, |
| .depth = 16, |
| .ybpp = 2, |
| .color = IMG_FMT_RGB565, |
| .colplanes = 1, |
| .flags = FMT_FL_S3C24XX_PREVIEW | |
| FMT_FL_S3C64XX, |
| }, { |
| .fourcc = V4L2_PIX_FMT_RGB32, |
| .depth = 32, |
| .ybpp = 4, |
| .color = IMG_FMT_XRGB8888, |
| .colplanes = 1, |
| .flags = FMT_FL_S3C24XX_PREVIEW | |
| FMT_FL_S3C64XX, |
| }, { |
| .fourcc = V4L2_PIX_FMT_BGR666, |
| .depth = 32, |
| .ybpp = 4, |
| .color = IMG_FMT_RGB666, |
| .colplanes = 1, |
| .flags = FMT_FL_S3C64XX, |
| } |
| }; |
| |
| /** |
| * s3c_camif_find_format() - lookup camif color format by fourcc or an index |
| * @vp: video path (DMA) description (codec/preview) |
| * @pixelformat: fourcc to match, ignored if null |
| * @index: index to the camif_formats array, ignored if negative |
| */ |
| const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp, |
| const u32 *pixelformat, |
| int index) |
| { |
| const struct camif_fmt *fmt, *def_fmt = NULL; |
| unsigned int i; |
| int id = 0; |
| |
| if (index >= (int)ARRAY_SIZE(camif_formats)) |
| return NULL; |
| |
| for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) { |
| fmt = &camif_formats[i]; |
| if (vp && !(vp->fmt_flags & fmt->flags)) |
| continue; |
| if (pixelformat && fmt->fourcc == *pixelformat) |
| return fmt; |
| if (index == id) |
| def_fmt = fmt; |
| id++; |
| } |
| return def_fmt; |
| } |
| |
| static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift) |
| { |
| unsigned int sh = 6; |
| |
| if (src >= 64 * tar) |
| return -EINVAL; |
| |
| while (sh--) { |
| unsigned int tmp = 1 << sh; |
| if (src >= tar * tmp) { |
| *shift = sh; |
| *ratio = tmp; |
| return 0; |
| } |
| } |
| *shift = 0; |
| *ratio = 1; |
| return 0; |
| } |
| |
| int s3c_camif_get_scaler_config(struct camif_vp *vp, |
| struct camif_scaler *scaler) |
| { |
| struct v4l2_rect *camif_crop = &vp->camif->camif_crop; |
| int source_x = camif_crop->width; |
| int source_y = camif_crop->height; |
| int target_x = vp->out_frame.rect.width; |
| int target_y = vp->out_frame.rect.height; |
| int ret; |
| |
| if (vp->rotation == 90 || vp->rotation == 270) |
| swap(target_x, target_y); |
| |
| ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio, |
| &scaler->h_shift); |
| if (ret < 0) |
| return ret; |
| |
| ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio, |
| &scaler->v_shift); |
| if (ret < 0) |
| return ret; |
| |
| scaler->pre_dst_width = source_x / scaler->pre_h_ratio; |
| scaler->pre_dst_height = source_y / scaler->pre_v_ratio; |
| |
| scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift); |
| scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift); |
| |
| scaler->scaleup_h = (target_x >= source_x); |
| scaler->scaleup_v = (target_y >= source_y); |
| |
| scaler->copy = 0; |
| |
| pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n", |
| scaler->pre_h_ratio, scaler->h_shift, |
| scaler->pre_v_ratio, scaler->v_shift); |
| |
| pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n", |
| source_x, source_y, target_x, target_y, |
| scaler->scaleup_h, scaler->scaleup_v); |
| |
| return 0; |
| } |
| |
| static int camif_register_sensor(struct camif_dev *camif) |
| { |
| struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor; |
| struct v4l2_device *v4l2_dev = &camif->v4l2_dev; |
| struct i2c_adapter *adapter; |
| struct v4l2_subdev_format format; |
| struct v4l2_subdev *sd; |
| int ret; |
| |
| camif->sensor.sd = NULL; |
| |
| if (sensor->i2c_board_info.addr == 0) |
| return -EINVAL; |
| |
| adapter = i2c_get_adapter(sensor->i2c_bus_num); |
| if (adapter == NULL) { |
| v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n", |
| sensor->i2c_bus_num); |
| return -EPROBE_DEFER; |
| } |
| |
| sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter, |
| &sensor->i2c_board_info, NULL); |
| if (sd == NULL) { |
| i2c_put_adapter(adapter); |
| v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n", |
| sensor->i2c_board_info.type); |
| return -EPROBE_DEFER; |
| } |
| camif->sensor.sd = sd; |
| |
| v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name); |
| |
| /* Get initial pixel format and set it at the camif sink pad */ |
| format.pad = 0; |
| format.which = V4L2_SUBDEV_FORMAT_ACTIVE; |
| ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format); |
| |
| if (ret < 0) |
| return 0; |
| |
| format.pad = CAMIF_SD_PAD_SINK; |
| v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format); |
| |
| v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n", |
| format.format.width, format.format.height, |
| format.format.code); |
| return 0; |
| } |
| |
| static void camif_unregister_sensor(struct camif_dev *camif) |
| { |
| struct v4l2_subdev *sd = camif->sensor.sd; |
| struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL; |
| struct i2c_adapter *adapter; |
| |
| if (client == NULL) |
| return; |
| |
| adapter = client->adapter; |
| v4l2_device_unregister_subdev(sd); |
| camif->sensor.sd = NULL; |
| i2c_unregister_device(client); |
| i2c_put_adapter(adapter); |
| } |
| |
| static int camif_create_media_links(struct camif_dev *camif) |
| { |
| int i, ret; |
| |
| ret = media_create_pad_link(&camif->sensor.sd->entity, 0, |
| &camif->subdev.entity, CAMIF_SD_PAD_SINK, |
| MEDIA_LNK_FL_IMMUTABLE | |
| MEDIA_LNK_FL_ENABLED); |
| if (ret) |
| return ret; |
| |
| for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) { |
| ret = media_create_pad_link(&camif->subdev.entity, i, |
| &camif->vp[i - 1].vdev.entity, 0, |
| MEDIA_LNK_FL_IMMUTABLE | |
| MEDIA_LNK_FL_ENABLED); |
| } |
| |
| return ret; |
| } |
| |
| static int camif_register_video_nodes(struct camif_dev *camif) |
| { |
| int ret = s3c_camif_register_video_node(camif, VP_CODEC); |
| if (ret < 0) |
| return ret; |
| |
| return s3c_camif_register_video_node(camif, VP_PREVIEW); |
| } |
| |
| static void camif_unregister_video_nodes(struct camif_dev *camif) |
| { |
| s3c_camif_unregister_video_node(camif, VP_CODEC); |
| s3c_camif_unregister_video_node(camif, VP_PREVIEW); |
| } |
| |
| static void camif_unregister_media_entities(struct camif_dev *camif) |
| { |
| camif_unregister_video_nodes(camif); |
| camif_unregister_sensor(camif); |
| s3c_camif_unregister_subdev(camif); |
| } |
| |
| /* |
| * Media device |
| */ |
| static int camif_media_dev_init(struct camif_dev *camif) |
| { |
| struct media_device *md = &camif->media_dev; |
| struct v4l2_device *v4l2_dev = &camif->v4l2_dev; |
| unsigned int ip_rev = camif->variant->ip_revision; |
| int ret; |
| |
| memset(md, 0, sizeof(*md)); |
| snprintf(md->model, sizeof(md->model), "Samsung S3C%s CAMIF", |
| ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X"); |
| strscpy(md->bus_info, "platform", sizeof(md->bus_info)); |
| md->hw_revision = ip_rev; |
| |
| md->dev = camif->dev; |
| |
| strscpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name)); |
| v4l2_dev->mdev = md; |
| |
| media_device_init(md); |
| |
| ret = v4l2_device_register(camif->dev, v4l2_dev); |
| if (ret < 0) |
| return ret; |
| |
| return ret; |
| } |
| |
| static void camif_clk_put(struct camif_dev *camif) |
| { |
| int i; |
| |
| for (i = 0; i < CLK_MAX_NUM; i++) { |
| if (IS_ERR(camif->clock[i])) |
| continue; |
| clk_unprepare(camif->clock[i]); |
| clk_put(camif->clock[i]); |
| camif->clock[i] = ERR_PTR(-EINVAL); |
| } |
| } |
| |
| static int camif_clk_get(struct camif_dev *camif) |
| { |
| int ret, i; |
| |
| for (i = 1; i < CLK_MAX_NUM; i++) |
| camif->clock[i] = ERR_PTR(-EINVAL); |
| |
| for (i = 0; i < CLK_MAX_NUM; i++) { |
| camif->clock[i] = clk_get(camif->dev, camif_clocks[i]); |
| if (IS_ERR(camif->clock[i])) { |
| ret = PTR_ERR(camif->clock[i]); |
| goto err; |
| } |
| ret = clk_prepare(camif->clock[i]); |
| if (ret < 0) { |
| clk_put(camif->clock[i]); |
| camif->clock[i] = NULL; |
| goto err; |
| } |
| } |
| return 0; |
| err: |
| camif_clk_put(camif); |
| dev_err(camif->dev, "failed to get clock: %s\n", |
| camif_clocks[i]); |
| return ret; |
| } |
| |
| /* |
| * The CAMIF device has two relatively independent data processing paths |
| * that can source data from memory or the common camera input frontend. |
| * Register interrupts for each data processing path (camif_vp). |
| */ |
| static int camif_request_irqs(struct platform_device *pdev, |
| struct camif_dev *camif) |
| { |
| int irq, ret, i; |
| |
| for (i = 0; i < CAMIF_VP_NUM; i++) { |
| struct camif_vp *vp = &camif->vp[i]; |
| |
| init_waitqueue_head(&vp->irq_queue); |
| |
| irq = platform_get_irq(pdev, i); |
| if (irq <= 0) |
| return -ENXIO; |
| |
| 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; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int s3c_camif_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct s3c_camif_plat_data *pdata = dev->platform_data; |
| struct s3c_camif_drvdata *drvdata; |
| struct camif_dev *camif; |
| int ret = 0; |
| |
| camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL); |
| if (!camif) |
| return -ENOMEM; |
| |
| spin_lock_init(&camif->slock); |
| mutex_init(&camif->lock); |
| |
| camif->dev = dev; |
| |
| if (!pdata || !pdata->gpio_get || !pdata->gpio_put) { |
| dev_err(dev, "wrong platform data\n"); |
| return -EINVAL; |
| } |
| |
| camif->pdata = *pdata; |
| drvdata = (void *)platform_get_device_id(pdev)->driver_data; |
| camif->variant = drvdata->variant; |
| |
| camif->io_base = devm_platform_ioremap_resource(pdev, 0); |
| if (IS_ERR(camif->io_base)) |
| return PTR_ERR(camif->io_base); |
| |
| ret = camif_request_irqs(pdev, camif); |
| if (ret < 0) |
| return ret; |
| |
| ret = pdata->gpio_get(); |
| if (ret < 0) |
| return ret; |
| |
| ret = s3c_camif_create_subdev(camif); |
| if (ret < 0) |
| goto err_sd; |
| |
| ret = camif_clk_get(camif); |
| if (ret < 0) |
| goto err_clk; |
| |
| platform_set_drvdata(pdev, camif); |
| clk_set_rate(camif->clock[CLK_CAM], |
| camif->pdata.sensor.clock_frequency); |
| |
| dev_info(dev, "sensor clock frequency: %lu\n", |
| clk_get_rate(camif->clock[CLK_CAM])); |
| /* |
| * 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); |
| |
| ret = pm_runtime_resume_and_get(dev); |
| if (ret < 0) |
| goto err_disable; |
| |
| 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); |
| err_disable: |
| 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"); |