/* * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver * * Copyright (C) 2012 Sylwester Nawrocki * Copyright (C) 2012 Tomasz Figa * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation, either version 2 of the License, * or (at your option) any later version. */ #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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[] = { { .name = "YUV 4:2:2 planar, Y/Cb/Cr", .fourcc = V4L2_PIX_FMT_YUV422P, .depth = 16, .ybpp = 1, .color = IMG_FMT_YCBCR422P, .colplanes = 3, .flags = FMT_FL_S3C24XX_CODEC | FMT_FL_S3C64XX, }, { .name = "YUV 4:2:0 planar, Y/Cb/Cr", .fourcc = V4L2_PIX_FMT_YUV420, .depth = 12, .ybpp = 1, .color = IMG_FMT_YCBCR420, .colplanes = 3, .flags = FMT_FL_S3C24XX_CODEC | FMT_FL_S3C64XX, }, { .name = "YVU 4:2:0 planar, Y/Cr/Cb", .fourcc = V4L2_PIX_FMT_YVU420, .depth = 12, .ybpp = 1, .color = IMG_FMT_YCRCB420, .colplanes = 3, .flags = FMT_FL_S3C24XX_CODEC | FMT_FL_S3C64XX, }, { .name = "RGB565, 16 bpp", .fourcc = V4L2_PIX_FMT_RGB565X, .depth = 16, .ybpp = 2, .color = IMG_FMT_RGB565, .colplanes = 1, .flags = FMT_FL_S3C24XX_PREVIEW | FMT_FL_S3C64XX, }, { .name = "XRGB8888, 32 bpp", .fourcc = V4L2_PIX_FMT_RGB32, .depth = 32, .ybpp = 4, .color = IMG_FMT_XRGB8888, .colplanes = 1, .flags = FMT_FL_S3C24XX_PREVIEW | FMT_FL_S3C64XX, }, { .name = "BGR666", .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 * @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"); strlcpy(md->bus_info, "platform", sizeof(md->bus_info)); md->hw_revision = ip_rev; md->driver_version = KERNEL_VERSION(1, 0, 0); md->dev = camif->dev; strlcpy(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) { dev_err(&pdev->dev, "failed to get IRQ %d\n", i); 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; struct resource *mres; 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; mres = platform_get_resource(pdev, IORESOURCE_MEM, 0); camif->io_base = devm_ioremap_resource(dev, mres); 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_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 "); MODULE_AUTHOR("Tomasz Figa "); MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver"); MODULE_LICENSE("GPL");