1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
5 * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
6 * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
8 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
10 #include <linux/bug.h>
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/device.h>
14 #include <linux/errno.h>
15 #include <linux/gpio.h>
16 #include <linux/i2c.h>
17 #include <linux/interrupt.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/types.h>
26 #include <linux/version.h>
28 #include <media/media-device.h>
29 #include <media/v4l2-ctrls.h>
30 #include <media/v4l2-ioctl.h>
31 #include <media/videobuf2-v4l2.h>
32 #include <media/videobuf2-dma-contig.h>
34 #include "camif-core.h"
36 static char *camif_clocks[CLK_MAX_NUM] = {
37 /* HCLK CAMIF clock */
39 /* CAMIF / external camera sensor master clock */
43 static const struct camif_fmt camif_formats[] = {
45 .fourcc = V4L2_PIX_FMT_YUV422P,
48 .color = IMG_FMT_YCBCR422P,
50 .flags = FMT_FL_S3C24XX_CODEC |
53 .fourcc = V4L2_PIX_FMT_YUV420,
56 .color = IMG_FMT_YCBCR420,
58 .flags = FMT_FL_S3C24XX_CODEC |
61 .fourcc = V4L2_PIX_FMT_YVU420,
64 .color = IMG_FMT_YCRCB420,
66 .flags = FMT_FL_S3C24XX_CODEC |
69 .fourcc = V4L2_PIX_FMT_RGB565X,
72 .color = IMG_FMT_RGB565,
74 .flags = FMT_FL_S3C24XX_PREVIEW |
77 .fourcc = V4L2_PIX_FMT_RGB32,
80 .color = IMG_FMT_XRGB8888,
82 .flags = FMT_FL_S3C24XX_PREVIEW |
85 .fourcc = V4L2_PIX_FMT_BGR666,
88 .color = IMG_FMT_RGB666,
90 .flags = FMT_FL_S3C64XX,
95 * s3c_camif_find_format() - lookup camif color format by fourcc or an index
96 * @vp: video path (DMA) description (codec/preview)
97 * @pixelformat: fourcc to match, ignored if null
98 * @index: index to the camif_formats array, ignored if negative
100 const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
101 const u32 *pixelformat,
104 const struct camif_fmt *fmt, *def_fmt = NULL;
108 if (index >= (int)ARRAY_SIZE(camif_formats))
111 for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
112 fmt = &camif_formats[i];
113 if (vp && !(vp->fmt_flags & fmt->flags))
115 if (pixelformat && fmt->fourcc == *pixelformat)
124 static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
132 unsigned int tmp = 1 << sh;
133 if (src >= tar * tmp) {
134 *shift = sh, *ratio = tmp;
138 *shift = 0, *ratio = 1;
142 int s3c_camif_get_scaler_config(struct camif_vp *vp,
143 struct camif_scaler *scaler)
145 struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
146 int source_x = camif_crop->width;
147 int source_y = camif_crop->height;
148 int target_x = vp->out_frame.rect.width;
149 int target_y = vp->out_frame.rect.height;
152 if (vp->rotation == 90 || vp->rotation == 270)
153 swap(target_x, target_y);
155 ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
160 ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
165 scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
166 scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
168 scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
169 scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
171 scaler->scaleup_h = (target_x >= source_x);
172 scaler->scaleup_v = (target_y >= source_y);
176 pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
177 scaler->pre_h_ratio, scaler->h_shift,
178 scaler->pre_v_ratio, scaler->v_shift);
180 pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
181 source_x, source_y, target_x, target_y,
182 scaler->scaleup_h, scaler->scaleup_v);
187 static int camif_register_sensor(struct camif_dev *camif)
189 struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
190 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
191 struct i2c_adapter *adapter;
192 struct v4l2_subdev_format format;
193 struct v4l2_subdev *sd;
196 camif->sensor.sd = NULL;
198 if (sensor->i2c_board_info.addr == 0)
201 adapter = i2c_get_adapter(sensor->i2c_bus_num);
202 if (adapter == NULL) {
203 v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
204 sensor->i2c_bus_num);
205 return -EPROBE_DEFER;
208 sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
209 &sensor->i2c_board_info, NULL);
211 i2c_put_adapter(adapter);
212 v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
213 sensor->i2c_board_info.type);
214 return -EPROBE_DEFER;
216 camif->sensor.sd = sd;
218 v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
220 /* Get initial pixel format and set it at the camif sink pad */
222 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
223 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
228 format.pad = CAMIF_SD_PAD_SINK;
229 v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
231 v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
232 format.format.width, format.format.height,
237 static void camif_unregister_sensor(struct camif_dev *camif)
239 struct v4l2_subdev *sd = camif->sensor.sd;
240 struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
241 struct i2c_adapter *adapter;
246 adapter = client->adapter;
247 v4l2_device_unregister_subdev(sd);
248 camif->sensor.sd = NULL;
249 i2c_unregister_device(client);
250 i2c_put_adapter(adapter);
253 static int camif_create_media_links(struct camif_dev *camif)
257 ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
258 &camif->subdev.entity, CAMIF_SD_PAD_SINK,
259 MEDIA_LNK_FL_IMMUTABLE |
260 MEDIA_LNK_FL_ENABLED);
264 for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
265 ret = media_create_pad_link(&camif->subdev.entity, i,
266 &camif->vp[i - 1].vdev.entity, 0,
267 MEDIA_LNK_FL_IMMUTABLE |
268 MEDIA_LNK_FL_ENABLED);
274 static int camif_register_video_nodes(struct camif_dev *camif)
276 int ret = s3c_camif_register_video_node(camif, VP_CODEC);
280 return s3c_camif_register_video_node(camif, VP_PREVIEW);
283 static void camif_unregister_video_nodes(struct camif_dev *camif)
285 s3c_camif_unregister_video_node(camif, VP_CODEC);
286 s3c_camif_unregister_video_node(camif, VP_PREVIEW);
289 static void camif_unregister_media_entities(struct camif_dev *camif)
291 camif_unregister_video_nodes(camif);
292 camif_unregister_sensor(camif);
293 s3c_camif_unregister_subdev(camif);
299 static int camif_media_dev_init(struct camif_dev *camif)
301 struct media_device *md = &camif->media_dev;
302 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
303 unsigned int ip_rev = camif->variant->ip_revision;
306 memset(md, 0, sizeof(*md));
307 snprintf(md->model, sizeof(md->model), "Samsung S3C%s CAMIF",
308 ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
309 strscpy(md->bus_info, "platform", sizeof(md->bus_info));
310 md->hw_revision = ip_rev;
312 md->dev = camif->dev;
314 strscpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
317 media_device_init(md);
319 ret = v4l2_device_register(camif->dev, v4l2_dev);
326 static void camif_clk_put(struct camif_dev *camif)
330 for (i = 0; i < CLK_MAX_NUM; i++) {
331 if (IS_ERR(camif->clock[i]))
333 clk_unprepare(camif->clock[i]);
334 clk_put(camif->clock[i]);
335 camif->clock[i] = ERR_PTR(-EINVAL);
339 static int camif_clk_get(struct camif_dev *camif)
343 for (i = 1; i < CLK_MAX_NUM; i++)
344 camif->clock[i] = ERR_PTR(-EINVAL);
346 for (i = 0; i < CLK_MAX_NUM; i++) {
347 camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
348 if (IS_ERR(camif->clock[i])) {
349 ret = PTR_ERR(camif->clock[i]);
352 ret = clk_prepare(camif->clock[i]);
354 clk_put(camif->clock[i]);
355 camif->clock[i] = NULL;
361 camif_clk_put(camif);
362 dev_err(camif->dev, "failed to get clock: %s\n",
368 * The CAMIF device has two relatively independent data processing paths
369 * that can source data from memory or the common camera input frontend.
370 * Register interrupts for each data processing path (camif_vp).
372 static int camif_request_irqs(struct platform_device *pdev,
373 struct camif_dev *camif)
377 for (i = 0; i < CAMIF_VP_NUM; i++) {
378 struct camif_vp *vp = &camif->vp[i];
380 init_waitqueue_head(&vp->irq_queue);
382 irq = platform_get_irq(pdev, i);
386 ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
387 0, dev_name(&pdev->dev), vp);
389 dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
397 static int s3c_camif_probe(struct platform_device *pdev)
399 struct device *dev = &pdev->dev;
400 struct s3c_camif_plat_data *pdata = dev->platform_data;
401 struct s3c_camif_drvdata *drvdata;
402 struct camif_dev *camif;
403 struct resource *mres;
406 camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
410 spin_lock_init(&camif->slock);
411 mutex_init(&camif->lock);
415 if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
416 dev_err(dev, "wrong platform data\n");
420 camif->pdata = *pdata;
421 drvdata = (void *)platform_get_device_id(pdev)->driver_data;
422 camif->variant = drvdata->variant;
424 mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
426 camif->io_base = devm_ioremap_resource(dev, mres);
427 if (IS_ERR(camif->io_base))
428 return PTR_ERR(camif->io_base);
430 ret = camif_request_irqs(pdev, camif);
434 ret = pdata->gpio_get();
438 ret = s3c_camif_create_subdev(camif);
442 ret = camif_clk_get(camif);
446 platform_set_drvdata(pdev, camif);
447 clk_set_rate(camif->clock[CLK_CAM],
448 camif->pdata.sensor.clock_frequency);
450 dev_info(dev, "sensor clock frequency: %lu\n",
451 clk_get_rate(camif->clock[CLK_CAM]));
453 * Set initial pixel format, resolution and crop rectangle.
454 * Must be done before a sensor subdev is registered as some
455 * settings are overrode with values from sensor subdev.
457 s3c_camif_set_defaults(camif);
459 pm_runtime_enable(dev);
461 ret = pm_runtime_get_sync(dev);
465 ret = camif_media_dev_init(camif);
469 ret = camif_register_sensor(camif);
473 ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
477 ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
481 ret = camif_register_video_nodes(camif);
485 ret = camif_create_media_links(camif);
489 ret = media_device_register(&camif->media_dev);
497 v4l2_device_unregister(&camif->v4l2_dev);
498 media_device_unregister(&camif->media_dev);
499 media_device_cleanup(&camif->media_dev);
500 camif_unregister_media_entities(camif);
503 pm_runtime_disable(dev);
504 camif_clk_put(camif);
506 s3c_camif_unregister_subdev(camif);
512 static int s3c_camif_remove(struct platform_device *pdev)
514 struct camif_dev *camif = platform_get_drvdata(pdev);
515 struct s3c_camif_plat_data *pdata = &camif->pdata;
517 media_device_unregister(&camif->media_dev);
518 media_device_cleanup(&camif->media_dev);
519 camif_unregister_media_entities(camif);
520 v4l2_device_unregister(&camif->v4l2_dev);
522 pm_runtime_disable(&pdev->dev);
523 camif_clk_put(camif);
529 static int s3c_camif_runtime_resume(struct device *dev)
531 struct camif_dev *camif = dev_get_drvdata(dev);
533 clk_enable(camif->clock[CLK_GATE]);
534 /* null op on s3c244x */
535 clk_enable(camif->clock[CLK_CAM]);
539 static int s3c_camif_runtime_suspend(struct device *dev)
541 struct camif_dev *camif = dev_get_drvdata(dev);
543 /* null op on s3c244x */
544 clk_disable(camif->clock[CLK_CAM]);
546 clk_disable(camif->clock[CLK_GATE]);
550 static const struct s3c_camif_variant s3c244x_camif_variant = {
553 .max_out_width = 4096,
554 .max_sc_out_width = 2048,
555 .out_width_align = 16,
560 .max_out_width = 640,
561 .max_sc_out_width = 640,
562 .out_width_align = 16,
568 .win_hor_offset_align = 8,
570 .ip_revision = S3C244X_CAMIF_IP_REV,
573 static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
574 .variant = &s3c244x_camif_variant,
575 .bus_clk_freq = 24000000UL,
578 static const struct s3c_camif_variant s3c6410_camif_variant = {
581 .max_out_width = 4096,
582 .max_sc_out_width = 2048,
583 .out_width_align = 16,
588 .max_out_width = 4096,
589 .max_sc_out_width = 720,
590 .out_width_align = 16,
596 .win_hor_offset_align = 8,
598 .ip_revision = S3C6410_CAMIF_IP_REV,
603 static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
604 .variant = &s3c6410_camif_variant,
605 .bus_clk_freq = 133000000UL,
608 static const struct platform_device_id s3c_camif_driver_ids[] = {
610 .name = "s3c2440-camif",
611 .driver_data = (unsigned long)&s3c244x_camif_drvdata,
613 .name = "s3c6410-camif",
614 .driver_data = (unsigned long)&s3c6410_camif_drvdata,
618 MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
620 static const struct dev_pm_ops s3c_camif_pm_ops = {
621 .runtime_suspend = s3c_camif_runtime_suspend,
622 .runtime_resume = s3c_camif_runtime_resume,
625 static struct platform_driver s3c_camif_driver = {
626 .probe = s3c_camif_probe,
627 .remove = s3c_camif_remove,
628 .id_table = s3c_camif_driver_ids,
630 .name = S3C_CAMIF_DRIVER_NAME,
631 .pm = &s3c_camif_pm_ops,
635 module_platform_driver(s3c_camif_driver);
637 MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
638 MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
639 MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
640 MODULE_LICENSE("GPL");