From ddd86436f4e3643c04b797f858dab95d5f2e4de9 Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 15:00:15 +0000 Subject: fish --- drivers/media/platform/s3c-camif/camif-core.c | 661 ++++++++++++++++++++++++++ 1 file changed, 661 insertions(+) create mode 100644 drivers/media/platform/s3c-camif/camif-core.c (limited to 'drivers/media/platform/s3c-camif/camif-core.c') diff --git a/drivers/media/platform/s3c-camif/camif-core.c b/drivers/media/platform/s3c-camif/camif-core.c new file mode 100644 index 0000000..0d0fab1 --- /dev/null +++ b/drivers/media/platform/s3c-camif/camif-core.c @@ -0,0 +1,661 @@ +/* + * 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); + if (adapter) + i2c_put_adapter(adapter); +} + +static int camif_create_media_links(struct camif_dev *camif) +{ + int i, ret; + + ret = media_entity_create_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_entity_create_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_register(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; + + ret = v4l2_device_register(camif->dev, v4l2_dev); + if (ret < 0) + return ret; + + ret = media_device_register(md); + if (ret < 0) + v4l2_device_unregister(v4l2_dev); + + return ret; +} + +static void camif_clk_put(struct camif_dev *camif) +{ + int i; + + for (i = 0; i < CLK_MAX_NUM; i++) { + if (IS_ERR_OR_NULL(camif->clock[i])) + continue; + clk_unprepare(camif->clock[i]); + clk_put(camif->clock[i]); + } +} + +static int camif_clk_get(struct camif_dev *camif) +{ + int ret, i; + + 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; + + /* Initialize contiguous memory allocator */ + camif->alloc_ctx = vb2_dma_contig_init_ctx(dev); + if (IS_ERR(camif->alloc_ctx)) { + ret = PTR_ERR(camif->alloc_ctx); + goto err_alloc; + } + + ret = camif_media_dev_register(camif); + if (ret < 0) + goto err_mdev; + + 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; + + mutex_lock(&camif->media_dev.graph_mutex); + + ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev); + if (ret < 0) + goto err_unlock; + + ret = camif_register_video_nodes(camif); + if (ret < 0) + goto err_unlock; + + ret = camif_create_media_links(camif); + if (ret < 0) + goto err_unlock; + + mutex_unlock(&camif->media_dev.graph_mutex); + pm_runtime_put(dev); + return 0; + +err_unlock: + mutex_unlock(&camif->media_dev.graph_mutex); +err_sens: + v4l2_device_unregister(&camif->v4l2_dev); + media_device_unregister(&camif->media_dev); + camif_unregister_media_entities(camif); +err_mdev: + vb2_dma_contig_cleanup_ctx(camif->alloc_ctx); +err_alloc: + pm_runtime_put(dev); + pm_runtime_disable(dev); +err_pm: + 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); + 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 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, + .owner = THIS_MODULE, + .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"); -- cgit v1.2.3