diff options
Diffstat (limited to 'drivers/media/video/mxc/capture/ipu_csi_enc.c')
| -rw-r--r-- | drivers/media/video/mxc/capture/ipu_csi_enc.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/drivers/media/video/mxc/capture/ipu_csi_enc.c b/drivers/media/video/mxc/capture/ipu_csi_enc.c new file mode 100644 index 000000000000..fb3d0d7d5ec6 --- /dev/null +++ b/drivers/media/video/mxc/capture/ipu_csi_enc.c @@ -0,0 +1,277 @@ +/* + * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +/*! + * @file csi_enc.c + * + * @brief CSI Use case for video capture + * + * @ingroup IPU + */ + +#include <linux/dma-mapping.h> +#include <linux/ipu.h> +#include "mxc_v4l2_capture.h" +#include "ipu_prp_sw.h" + +#ifdef CAMERA_DBG + #define CAMERA_TRACE(x) (printk)x +#else + #define CAMERA_TRACE(x) +#endif + +/* + * Function definitions + */ + +/*! + * csi ENC callback function. + * + * @param irq int irq line + * @param dev_id void * device id + * + * @return status IRQ_HANDLED for handled + */ +static irqreturn_t csi_enc_callback(int irq, void *dev_id) +{ + cam_data *cam = (cam_data *) dev_id; + + if (cam->enc_callback == NULL) + return IRQ_HANDLED; + + cam->enc_callback(irq, dev_id); + return IRQ_HANDLED; +} + +/*! + * CSI ENC enable channel setup function + * + * @param cam struct cam_data * mxc capture instance + * + * @return status + */ +static int csi_enc_setup(cam_data *cam) +{ + ipu_channel_params_t params; + u32 pixel_fmt; + int err = 0; + dma_addr_t dummy = 0xdeadbeaf; + + CAMERA_TRACE("In csi_enc_setup\n"); + if (!cam) { + printk(KERN_ERR "cam private is NULL\n"); + return -ENXIO; + } + + memset(¶ms, 0, sizeof(ipu_channel_params_t)); + params.csi_mem.csi = cam->csi; + + if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) + pixel_fmt = IPU_PIX_FMT_YUV420P; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P) + pixel_fmt = IPU_PIX_FMT_YUV422P; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_UYVY) + pixel_fmt = IPU_PIX_FMT_UYVY; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_NV12) + pixel_fmt = IPU_PIX_FMT_NV12; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR24) + pixel_fmt = IPU_PIX_FMT_BGR24; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB24) + pixel_fmt = IPU_PIX_FMT_RGB24; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB565) + pixel_fmt = IPU_PIX_FMT_RGB565; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_BGR32) + pixel_fmt = IPU_PIX_FMT_BGR32; + else if (cam->v2f.fmt.pix.pixelformat == V4L2_PIX_FMT_RGB32) + pixel_fmt = IPU_PIX_FMT_RGB32; + else { + printk(KERN_ERR "format not supported\n"); + return -EINVAL; + } + + ipu_csi_enable_mclk_if(CSI_MCLK_ENC, cam->csi, true, true); + + err = ipu_init_channel(CSI_MEM, ¶ms); + if (err != 0) { + printk(KERN_ERR "ipu_init_channel %d\n", err); + return err; + } + + err = ipu_init_channel_buffer(CSI_MEM, IPU_OUTPUT_BUFFER, + pixel_fmt, cam->v2f.fmt.pix.width, + cam->v2f.fmt.pix.height, + cam->v2f.fmt.pix.width, IPU_ROTATE_NONE, + dummy, dummy, + cam->offset.u_offset, + cam->offset.v_offset); + if (err != 0) { + printk(KERN_ERR "CSI_MEM output buffer\n"); + return err; + } + err = ipu_enable_channel(CSI_MEM); + if (err < 0) { + printk(KERN_ERR "ipu_enable_channel CSI_MEM\n"); + return err; + } + + return err; +} + +/*! + * function to update physical buffer address for encorder IDMA channel + * + * @param eba physical buffer address for encorder IDMA channel + * @param buffer_num int buffer 0 or buffer 1 + * + * @return status + */ +static int csi_enc_eba_update(dma_addr_t eba, int *buffer_num) +{ + int err = 0; + + pr_debug("eba %x\n", eba); + err = ipu_update_channel_buffer(CSI_MEM, IPU_OUTPUT_BUFFER, + *buffer_num, eba); + if (err != 0) { + printk(KERN_ERR "err %d buffer_num %d\n", err, *buffer_num); + return err; + } + + ipu_select_buffer(CSI_MEM, IPU_OUTPUT_BUFFER, *buffer_num); + + *buffer_num = (*buffer_num == 0) ? 1 : 0; + + return 0; +} + +/*! + * Enable encoder task + * @param private struct cam_data * mxc capture instance + * + * @return status + */ +static int csi_enc_enabling_tasks(void *private) +{ + cam_data *cam = (cam_data *) private; + int err = 0; + CAMERA_TRACE("IPU:In csi_enc_enabling_tasks\n"); + + err = ipu_request_irq(IPU_IRQ_CSI0_OUT_EOF, + csi_enc_callback, 0, "Mxc Camera", cam); + if (err != 0) { + printk(KERN_ERR "Error registering rot irq\n"); + return err; + } + + err = csi_enc_setup(cam); + if (err != 0) { + printk(KERN_ERR "csi_enc_setup %d\n", err); + return err; + } + + return err; +} + +/*! + * Disable encoder task + * @param private struct cam_data * mxc capture instance + * + * @return int + */ +static int csi_enc_disabling_tasks(void *private) +{ + cam_data *cam = (cam_data *) private; + int err = 0; + + ipu_free_irq(IPU_IRQ_CSI0_OUT_EOF, cam); + + err = ipu_disable_channel(CSI_MEM, true); + + ipu_uninit_channel(CSI_MEM); + + ipu_csi_enable_mclk_if(CSI_MCLK_ENC, cam->csi, false, false); + + return err; +} + +/*! + * function to select CSI ENC as the working path + * + * @param private struct cam_data * mxc capture instance + * + * @return int + */ +int csi_enc_select(void *private) +{ + cam_data *cam = (cam_data *) private; + int err = 0; + + if (cam) { + cam->enc_update_eba = csi_enc_eba_update; + cam->enc_enable = csi_enc_enabling_tasks; + cam->enc_disable = csi_enc_disabling_tasks; + } else { + err = -EIO; + } + + return err; +} + +/*! + * function to de-select CSI ENC as the working path + * + * @param private struct cam_data * mxc capture instance + * + * @return int + */ +int csi_enc_deselect(void *private) +{ + cam_data *cam = (cam_data *) private; + int err = 0; + + if (cam) { + cam->enc_update_eba = NULL; + cam->enc_enable = NULL; + cam->enc_disable = NULL; + } + + return err; +} + +/*! + * Init the Encorder channels + * + * @return Error code indicating success or failure + */ +__init int csi_enc_init(void) +{ + return 0; +} + +/*! + * Deinit the Encorder channels + * + */ +void __exit csi_enc_exit(void) +{ +} + +module_init(csi_enc_init); +module_exit(csi_enc_exit); + +EXPORT_SYMBOL(csi_enc_select); +EXPORT_SYMBOL(csi_enc_deselect); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("CSI ENC Driver"); +MODULE_LICENSE("GPL"); |