1 files changed, 390 insertions, 0 deletions

diff --git a/drivers/media/platform/omap/omap_vout_vrfb.c b/drivers/media/platform/omap/omap_vout_vrfb.c
new file mode 100644
index 000000000000..4be26abf6cea
--- /dev/null
+++ b/drivers/media/platform/omap/omap_vout_vrfb.c
@@ -0,0 +1,390 @@
+/*
+ * omap_vout_vrfb.c
+ *
+ * Copyright (C) 2010 Texas Instruments.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/platform_device.h>
+#include <linux/videodev2.h>
+
+#include <media/videobuf-dma-contig.h>
+#include <media/v4l2-device.h>
+
+#include <plat/dma.h>
+#include <plat/vrfb.h>
+
+#include "omap_voutdef.h"
+#include "omap_voutlib.h"
+
+/*
+ * Function for allocating video buffers
+ */
+static int omap_vout_allocate_vrfb_buffers(struct omap_vout_device *vout,
+                unsigned int *count, int startindex)
+{
+        int i, j;
+
+        for (i = 0; i < *count; i++) {
+                if (!vout->smsshado_virt_addr[i]) {
+                        vout->smsshado_virt_addr[i] =
+                                omap_vout_alloc_buffer(vout->smsshado_size,
+                                                &vout->smsshado_phy_addr[i]);
+                }
+                if (!vout->smsshado_virt_addr[i] && startindex != -1) {
+                        if (V4L2_MEMORY_MMAP == vout->memory && i >= startindex)
+                                break;
+                }
+                if (!vout->smsshado_virt_addr[i]) {
+                        for (j = 0; j < i; j++) {
+                                omap_vout_free_buffer(
+                                                vout->smsshado_virt_addr[j],
+                                                vout->smsshado_size);
+                                vout->smsshado_virt_addr[j] = 0;
+                                vout->smsshado_phy_addr[j] = 0;
+                        }
+                        *count = 0;
+                        return -ENOMEM;
+                }
+                memset((void *) vout->smsshado_virt_addr[i], 0,
+                                vout->smsshado_size);
+        }
+        return 0;
+}
+
+/*
+ * Wakes up the application once the DMA transfer to VRFB space is completed.
+ */
+static void omap_vout_vrfb_dma_tx_callback(int lch, u16 ch_status, void *data)
+{
+        struct vid_vrfb_dma *t = (struct vid_vrfb_dma *) data;
+
+        t->tx_status = 1;
+        wake_up_interruptible(&t->wait);
+}
+
+/*
+ * Free VRFB buffers
+ */
+void omap_vout_free_vrfb_buffers(struct omap_vout_device *vout)
+{
+        int j;
+
+        for (j = 0; j < VRFB_NUM_BUFS; j++) {
+                omap_vout_free_buffer(vout->smsshado_virt_addr[j],
+                                vout->smsshado_size);
+                vout->smsshado_virt_addr[j] = 0;
+                vout->smsshado_phy_addr[j] = 0;
+        }
+}
+
+int omap_vout_setup_vrfb_bufs(struct platform_device *pdev, int vid_num,
+                              bool static_vrfb_allocation)
+{
+        int ret = 0, i, j;
+        struct omap_vout_device *vout;
+        struct video_device *vfd;
+        int image_width, image_height;
+        int vrfb_num_bufs = VRFB_NUM_BUFS;
+        struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
+        struct omap2video_device *vid_dev =
+                container_of(v4l2_dev, struct omap2video_device, v4l2_dev);
+
+        vout = vid_dev->vouts[vid_num];
+        vfd = vout->vfd;
+
+        for (i = 0; i < VRFB_NUM_BUFS; i++) {
+                if (omap_vrfb_request_ctx(&vout->vrfb_context[i])) {
+                        dev_info(&pdev->dev, ": VRFB allocation failed\n");
+                        for (j = 0; j < i; j++)
+                                omap_vrfb_release_ctx(&vout->vrfb_context[j]);
+                        ret = -ENOMEM;
+                        goto free_buffers;
+                }
+        }
+
+        /* Calculate VRFB memory size */
+        /* allocate for worst case size */
+        image_width = VID_MAX_WIDTH / TILE_SIZE;
+        if (VID_MAX_WIDTH % TILE_SIZE)
+                image_width++;
+
+        image_width = image_width * TILE_SIZE;
+        image_height = VID_MAX_HEIGHT / TILE_SIZE;
+
+        if (VID_MAX_HEIGHT % TILE_SIZE)
+                image_height++;
+
+        image_height = image_height * TILE_SIZE;
+        vout->smsshado_size = PAGE_ALIGN(image_width * image_height * 2 * 2);
+
+        /*
+         * Request and Initialize DMA, for DMA based VRFB transfer
+         */
+        vout->vrfb_dma_tx.dev_id = OMAP_DMA_NO_DEVICE;
+        vout->vrfb_dma_tx.dma_ch = -1;
+        vout->vrfb_dma_tx.req_status = DMA_CHAN_ALLOTED;
+        ret = omap_request_dma(vout->vrfb_dma_tx.dev_id, "VRFB DMA TX",
+                        omap_vout_vrfb_dma_tx_callback,
+                        (void *) &vout->vrfb_dma_tx, &vout->vrfb_dma_tx.dma_ch);
+        if (ret < 0) {
+                vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
+                dev_info(&pdev->dev, ": failed to allocate DMA Channel for"
+                                " video%d\n", vfd->minor);
+        }
+        init_waitqueue_head(&vout->vrfb_dma_tx.wait);
+
+        /* statically allocated the VRFB buffer is done through
+           commands line aruments */
+        if (static_vrfb_allocation) {
+                if (omap_vout_allocate_vrfb_buffers(vout, &vrfb_num_bufs, -1)) {
+                        ret =  -ENOMEM;
+                        goto release_vrfb_ctx;
+                }
+                vout->vrfb_static_allocation = 1;
+        }
+        return 0;
+
+release_vrfb_ctx:
+        for (j = 0; j < VRFB_NUM_BUFS; j++)
+                omap_vrfb_release_ctx(&vout->vrfb_context[j]);
+free_buffers:
+        omap_vout_free_buffers(vout);
+
+        return ret;
+}
+
+/*
+ * Release the VRFB context once the module exits
+ */
+void omap_vout_release_vrfb(struct omap_vout_device *vout)
+{
+        int i;
+
+        for (i = 0; i < VRFB_NUM_BUFS; i++)
+                omap_vrfb_release_ctx(&vout->vrfb_context[i]);
+
+        if (vout->vrfb_dma_tx.req_status == DMA_CHAN_ALLOTED) {
+                vout->vrfb_dma_tx.req_status = DMA_CHAN_NOT_ALLOTED;
+                omap_free_dma(vout->vrfb_dma_tx.dma_ch);
+        }
+}
+
+/*
+ * Allocate the buffers for the VRFB space.  Data is copied from V4L2
+ * buffers to the VRFB buffers using the DMA engine.
+ */
+int omap_vout_vrfb_buffer_setup(struct omap_vout_device *vout,
+                          unsigned int *count, unsigned int startindex)
+{
+        int i;
+        bool yuv_mode;
+
+        if (!is_rotation_enabled(vout))
+                return 0;
+
+        /* If rotation is enabled, allocate memory for VRFB space also */
+        *count = *count > VRFB_NUM_BUFS ? VRFB_NUM_BUFS : *count;
+
+        /* Allocate the VRFB buffers only if the buffers are not
+         * allocated during init time.
+         */
+        if (!vout->vrfb_static_allocation)
+                if (omap_vout_allocate_vrfb_buffers(vout, count, startindex))
+                        return -ENOMEM;
+
+        if (vout->dss_mode == OMAP_DSS_COLOR_YUV2 ||
+                        vout->dss_mode == OMAP_DSS_COLOR_UYVY)
+                yuv_mode = true;
+        else
+                yuv_mode = false;
+
+        for (i = 0; i < *count; i++)
+                omap_vrfb_setup(&vout->vrfb_context[i],
+                                vout->smsshado_phy_addr[i], vout->pix.width,
+                                vout->pix.height, vout->bpp, yuv_mode);
+
+        return 0;
+}
+
+int omap_vout_prepare_vrfb(struct omap_vout_device *vout,
+                                struct videobuf_buffer *vb)
+{
+        dma_addr_t dmabuf;
+        struct vid_vrfb_dma *tx;
+        enum dss_rotation rotation;
+        u32 dest_frame_index = 0, src_element_index = 0;
+        u32 dest_element_index = 0, src_frame_index = 0;
+        u32 elem_count = 0, frame_count = 0, pixsize = 2;
+
+        if (!is_rotation_enabled(vout))
+                return 0;
+
+        dmabuf = vout->buf_phy_addr[vb->i];
+        /* If rotation is enabled, copy input buffer into VRFB
+         * memory space using DMA. We are copying input buffer
+         * into VRFB memory space of desired angle and DSS will
+         * read image VRFB memory for 0 degree angle
+         */
+        pixsize = vout->bpp * vout->vrfb_bpp;
+        /*
+         * DMA transfer in double index mode
+         */
+
+        /* Frame index */
+        dest_frame_index = ((MAX_PIXELS_PER_LINE * pixsize) -
+                        (vout->pix.width * vout->bpp)) + 1;
+
+        /* Source and destination parameters */
+        src_element_index = 0;
+        src_frame_index = 0;
+        dest_element_index = 1;
+        /* Number of elements per frame */
+        elem_count = vout->pix.width * vout->bpp;
+        frame_count = vout->pix.height;
+        tx = &vout->vrfb_dma_tx;
+        tx->tx_status = 0;
+        omap_set_dma_transfer_params(tx->dma_ch, OMAP_DMA_DATA_TYPE_S32,
+                        (elem_count / 4), frame_count, OMAP_DMA_SYNC_ELEMENT,
+                        tx->dev_id, 0x0);
+        /* src_port required only for OMAP1 */
+        omap_set_dma_src_params(tx->dma_ch, 0, OMAP_DMA_AMODE_POST_INC,
+                        dmabuf, src_element_index, src_frame_index);
+        /*set dma source burst mode for VRFB */
+        omap_set_dma_src_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
+        rotation = calc_rotation(vout);
+
+        /* dest_port required only for OMAP1 */
+        omap_set_dma_dest_params(tx->dma_ch, 0, OMAP_DMA_AMODE_DOUBLE_IDX,
+                        vout->vrfb_context[vb->i].paddr[0], dest_element_index,
+                        dest_frame_index);
+        /*set dma dest burst mode for VRFB */
+        omap_set_dma_dest_burst_mode(tx->dma_ch, OMAP_DMA_DATA_BURST_16);
+        omap_dma_set_global_params(DMA_DEFAULT_ARB_RATE, 0x20, 0);
+
+        omap_start_dma(tx->dma_ch);
+        interruptible_sleep_on_timeout(&tx->wait, VRFB_TX_TIMEOUT);
+
+        if (tx->tx_status == 0) {
+                omap_stop_dma(tx->dma_ch);
+                return -EINVAL;
+        }
+        /* Store buffers physical address into an array. Addresses
+         * from this array will be used to configure DSS */
+        vout->queued_buf_addr[vb->i] = (u8 *)
+                vout->vrfb_context[vb->i].paddr[rotation];
+        return 0;
+}
+
+/*
+ * Calculate the buffer offsets from which the streaming should
+ * start. This offset calculation is mainly required because of
+ * the VRFB 32 pixels alignment with rotation.
+ */
+void omap_vout_calculate_vrfb_offset(struct omap_vout_device *vout)
+{
+        enum dss_rotation rotation;
+        bool mirroring = vout->mirror;
+        struct v4l2_rect *crop = &vout->crop;
+        struct v4l2_pix_format *pix = &vout->pix;
+        int *cropped_offset = &vout->cropped_offset;
+        int vr_ps = 1, ps = 2, temp_ps = 2;
+        int offset = 0, ctop = 0, cleft = 0, line_length = 0;
+
+        rotation = calc_rotation(vout);
+
+        if (V4L2_PIX_FMT_YUYV == pix->pixelformat ||
+                        V4L2_PIX_FMT_UYVY == pix->pixelformat) {
+                if (is_rotation_enabled(vout)) {
+                        /*
+                         * ps    - Actual pixel size for YUYV/UYVY for
+                         *         VRFB/Mirroring is 4 bytes
+                         * vr_ps - Virtually pixel size for YUYV/UYVY is
+                         *         2 bytes
+                         */
+                        ps = 4;
+                        vr_ps = 2;
+                } else {
+                        ps = 2; /* otherwise the pixel size is 2 byte */
+                }
+        } else if (V4L2_PIX_FMT_RGB32 == pix->pixelformat) {
+                ps = 4;
+        } else if (V4L2_PIX_FMT_RGB24 == pix->pixelformat) {
+                ps = 3;
+        }
+        vout->ps = ps;
+        vout->vr_ps = vr_ps;
+
+        if (is_rotation_enabled(vout)) {
+                line_length = MAX_PIXELS_PER_LINE;
+                ctop = (pix->height - crop->height) - crop->top;
+                cleft = (pix->width - crop->width) - crop->left;
+        } else {
+                line_length = pix->width;
+        }
+        vout->line_length = line_length;
+        switch (rotation) {
+        case dss_rotation_90_degree:
+                offset = vout->vrfb_context[0].yoffset *
+                        vout->vrfb_context[0].bytespp;
+                temp_ps = ps / vr_ps;
+                if (mirroring == 0) {
+                        *cropped_offset = offset + line_length *
+                                temp_ps * cleft + crop->top * temp_ps;
+                } else {
+                        *cropped_offset = offset + line_length * temp_ps *
+                                cleft + crop->top * temp_ps + (line_length *
+                                ((crop->width / (vr_ps)) - 1) * ps);
+                }
+                break;
+        case dss_rotation_180_degree:
+                offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset *
+                        vout->vrfb_context[0].bytespp) +
+                        (vout->vrfb_context[0].xoffset *
+                        vout->vrfb_context[0].bytespp));
+                if (mirroring == 0) {
+                        *cropped_offset = offset + (line_length * ps * ctop) +
+                                (cleft / vr_ps) * ps;
+
+                } else {
+                        *cropped_offset = offset + (line_length * ps * ctop) +
+                                (cleft / vr_ps) * ps + (line_length *
+                                (crop->height - 1) * ps);
+                }
+                break;
+        case dss_rotation_270_degree:
+                offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset *
+                        vout->vrfb_context[0].bytespp;
+                temp_ps = ps / vr_ps;
+                if (mirroring == 0) {
+                        *cropped_offset = offset + line_length *
+                            temp_ps * crop->left + ctop * ps;
+                } else {
+                        *cropped_offset = offset + line_length *
+                                temp_ps * crop->left + ctop * ps +
+                                (line_length * ((crop->width / vr_ps) - 1) *
+                                 ps);
+                }
+                break;
+        case dss_rotation_0_degree:
+                if (mirroring == 0) {
+                        *cropped_offset = (line_length * ps) *
+                                crop->top + (crop->left / vr_ps) * ps;
+                } else {
+                        *cropped_offset = (line_length * ps) *
+                                crop->top + (crop->left / vr_ps) * ps +
+                                (line_length * (crop->height - 1) * ps);
+                }
+                break;
+        default:
+                *cropped_offset = (line_length * ps * crop->top) /
+                        vr_ps + (crop->left * ps) / vr_ps +
+                        ((crop->width / vr_ps) - 1) * ps;
+                break;
+        }
+}