new file mode 100644
@@ -0,0 +1,581 @@
+/*
+ * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#include "iss.h"
+#include "iss_regs.h"
+#include "iss_ipipe.h"
+
+static struct v4l2_mbus_framefmt *
+__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which);
+
+static const unsigned int ipipe_fmts[] = {
+ V4L2_MBUS_FMT_SGRBG10_1X10,
+ V4L2_MBUS_FMT_SRGGB10_1X10,
+ V4L2_MBUS_FMT_SBGGR10_1X10,
+ V4L2_MBUS_FMT_SGBRG10_1X10,
+};
+
+/*
+ * ipipe_print_status - Print current IPIPE Module register values.
+ * @ipipe: Pointer to ISS ISP IPIPE device.
+ *
+ * Also prints other debug information stored in the IPIPE module.
+ */
+#define IPIPE_PRINT_REGISTER(iss, name)\
+ dev_dbg(iss->dev, "###IPIPE " #name "=0x%08x\n", \
+ readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_##name))
+
+static void ipipe_print_status(struct iss_ipipe_device *ipipe)
+{
+ struct iss_device *iss = to_iss_device(ipipe);
+
+ dev_dbg(iss->dev, "-------------IPIPE Register dump-------------\n");
+
+ IPIPE_PRINT_REGISTER(iss, SRC_EN);
+ IPIPE_PRINT_REGISTER(iss, SRC_MODE);
+ IPIPE_PRINT_REGISTER(iss, SRC_FMT);
+ IPIPE_PRINT_REGISTER(iss, SRC_COL);
+ IPIPE_PRINT_REGISTER(iss, SRC_VPS);
+ IPIPE_PRINT_REGISTER(iss, SRC_VSZ);
+ IPIPE_PRINT_REGISTER(iss, SRC_HPS);
+ IPIPE_PRINT_REGISTER(iss, SRC_HSZ);
+ IPIPE_PRINT_REGISTER(iss, GCK_MMR);
+ IPIPE_PRINT_REGISTER(iss, YUV_PHS);
+
+ dev_dbg(iss->dev, "-----------------------------------------------\n");
+}
+
+/*
+ * ipipe_enable - Enable/Disable IPIPE.
+ * @enable: enable flag
+ *
+ */
+static void ipipe_enable(struct iss_ipipe_device *ipipe, u8 enable)
+{
+ struct iss_device *iss = to_iss_device(ipipe);
+
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_EN) &
+ ~IPIPE_SRC_EN_EN) |
+ enable ? IPIPE_SRC_EN_EN : 0,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_EN);
+}
+
+/* -----------------------------------------------------------------------------
+ * Format- and pipeline-related configuration helpers
+ */
+
+static void ipipe_configure(struct iss_ipipe_device *ipipe)
+{
+ struct iss_device *iss = to_iss_device(ipipe);
+ struct v4l2_mbus_framefmt *format;
+
+ /* IPIPE_PAD_SINK */
+ format = &ipipe->formats[IPIPE_PAD_SINK];
+
+ /* NOTE: Currently just supporting pipeline IN: RGB, OUT: YUV422 */
+ writel(IPIPE_SRC_FMT_RAW2YUV,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_FMT);
+
+ /* Enable YUV444 -> YUV422 conversion */
+ writel(IPIPE_YUV_PHS_LPF,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_YUV_PHS);
+
+ writel(0, iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_VPS);
+ writel(0, iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_HPS);
+ writel((format->height - 2) & IPIPE_SRC_VSZ_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_VSZ);
+ writel((format->width - 1) & IPIPE_SRC_HSZ_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_HSZ);
+
+ /* Ignore ipipeif_wrt signal, and operate on-the-fly. */
+ writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_MODE) &
+ ~(IPIPE_SRC_MODE_WRT | IPIPE_SRC_MODE_OST),
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_MODE);
+
+ /* HACK: Values tuned for Ducati SW (OV) */
+ writel(IPIPE_SRC_COL_EE_B |
+ IPIPE_SRC_COL_EO_GB |
+ IPIPE_SRC_COL_OE_GR |
+ IPIPE_SRC_COL_OO_R,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_SRC_COL);
+
+ /* IPIPE_PAD_SOURCE_VP */
+ format = &ipipe->formats[IPIPE_PAD_SOURCE_VP];
+ /* Do nothing? */
+
+ omap4iss_isp_enable_interrupts(iss);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev operations
+ */
+
+/*
+ * ipipe_set_stream - Enable/Disable streaming on the IPIPE module
+ * @sd: ISP IPIPE V4L2 subdevice
+ * @enable: Enable/disable stream
+ */
+static int ipipe_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
+ struct iss_device *iss = to_iss_device(ipipe);
+ int ret = 0;
+
+ if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) {
+ if (enable == ISS_PIPELINE_STREAM_STOPPED)
+ return 0;
+
+ omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE);
+
+ /* Enable clk_arm_g0 */
+ writel(IPIPE_GCK_MMR_REG,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_GCK_MMR);
+
+ /* Enable clk_pix_g[3:0] */
+ writel(IPIPE_GCK_PIX_G3 |
+ IPIPE_GCK_PIX_G2 |
+ IPIPE_GCK_PIX_G1 |
+ IPIPE_GCK_PIX_G0,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPE] + IPIPE_GCK_PIX);
+ }
+
+ switch (enable) {
+ case ISS_PIPELINE_STREAM_CONTINUOUS:
+
+ ipipe_configure(ipipe);
+ ipipe_print_status(ipipe);
+
+ atomic_set(&ipipe->stopping, 0);
+ ipipe_enable(ipipe, 1);
+ break;
+
+ case ISS_PIPELINE_STREAM_STOPPED:
+ if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED)
+ return 0;
+ if (omap4iss_module_sync_idle(&sd->entity, &ipipe->wait,
+ &ipipe->stopping))
+ dev_dbg(iss->dev, "%s: module stop timeout.\n",
+ sd->name);
+
+ ipipe_enable(ipipe, 0);
+ omap4iss_isp_disable_interrupts(iss);
+ omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE);
+ break;
+ }
+
+ ipipe->state = enable;
+ return ret;
+}
+
+static struct v4l2_mbus_framefmt *
+__ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(fh, pad);
+ else
+ return &ipipe->formats[pad];
+}
+
+/*
+ * ipipe_try_format - Try video format on a pad
+ * @ipipe: ISS IPIPE device
+ * @fh : V4L2 subdev file handle
+ * @pad: Pad number
+ * @fmt: Format
+ */
+static void
+ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_fh *fh,
+ unsigned int pad, struct v4l2_mbus_framefmt *fmt,
+ enum v4l2_subdev_format_whence which)
+{
+ struct v4l2_mbus_framefmt *format;
+ unsigned int width = fmt->width;
+ unsigned int height = fmt->height;
+ unsigned int i;
+
+ switch (pad) {
+ case IPIPE_PAD_SINK:
+ for (i = 0; i < ARRAY_SIZE(ipipe_fmts); i++) {
+ if (fmt->code == ipipe_fmts[i])
+ break;
+ }
+
+ /* If not found, use SGRBG10 as default */
+ if (i >= ARRAY_SIZE(ipipe_fmts))
+ fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+
+ /* Clamp the input size. */
+ fmt->width = clamp_t(u32, width, 1, 8192);
+ fmt->height = clamp_t(u32, height, 1, 8192);
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ break;
+
+ case IPIPE_PAD_SOURCE_VP:
+ format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SINK, which);
+ memcpy(fmt, format, sizeof(*fmt));
+
+ fmt->code = V4L2_MBUS_FMT_UYVY8_1X16;
+ fmt->width = clamp_t(u32, width, 32, fmt->width);
+ fmt->height = clamp_t(u32, height, 32, fmt->height);
+ fmt->colorspace = V4L2_COLORSPACE_JPEG;
+ break;
+ }
+
+ fmt->field = V4L2_FIELD_NONE;
+}
+
+/*
+ * ipipe_enum_mbus_code - Handle pixel format enumeration
+ * @sd : pointer to v4l2 subdev structure
+ * @fh : V4L2 subdev file handle
+ * @code : pointer to v4l2_subdev_mbus_code_enum structure
+ * return -EINVAL or zero on success
+ */
+static int ipipe_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ switch (code->pad) {
+ case IPIPE_PAD_SINK:
+ if (code->index >= ARRAY_SIZE(ipipe_fmts))
+ return -EINVAL;
+
+ code->code = ipipe_fmts[code->index];
+ break;
+
+ case IPIPE_PAD_SOURCE_VP:
+ /* FIXME: Forced format conversion inside IPIPE ? */
+ if (code->index != 0)
+ return -EINVAL;
+
+ code->code = V4L2_MBUS_FMT_UYVY8_1X16;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ipipe_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt format;
+
+ if (fse->index != 0)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = 1;
+ format.height = 1;
+ ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+ fse->min_width = format.width;
+ fse->min_height = format.height;
+
+ if (format.code != fse->code)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = -1;
+ format.height = -1;
+ ipipe_try_format(ipipe, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+ fse->max_width = format.width;
+ fse->max_height = format.height;
+
+ return 0;
+}
+
+/*
+ * ipipe_get_format - Retrieve the video format on a pad
+ * @sd : ISP IPIPE V4L2 subdevice
+ * @fh : V4L2 subdev file handle
+ * @fmt: Format
+ *
+ * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
+ * to the format type.
+ */
+static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ fmt->format = *format;
+ return 0;
+}
+
+/*
+ * ipipe_set_format - Set the video format on a pad
+ * @sd : ISP IPIPE V4L2 subdevice
+ * @fh : V4L2 subdev file handle
+ * @fmt: Format
+ *
+ * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
+ * to the format type.
+ */
+static int ipipe_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __ipipe_get_format(ipipe, fh, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ ipipe_try_format(ipipe, fh, fmt->pad, &fmt->format, fmt->which);
+ *format = fmt->format;
+
+ /* Propagate the format from sink to source */
+ if (fmt->pad == IPIPE_PAD_SINK) {
+ format = __ipipe_get_format(ipipe, fh, IPIPE_PAD_SOURCE_VP,
+ fmt->which);
+ *format = fmt->format;
+ ipipe_try_format(ipipe, fh, IPIPE_PAD_SOURCE_VP, format,
+ fmt->which);
+ }
+
+ return 0;
+}
+
+static int ipipe_link_validate(struct v4l2_subdev *sd, struct media_link *link,
+ struct v4l2_subdev_format *source_fmt,
+ struct v4l2_subdev_format *sink_fmt)
+{
+ /* Check if the two ends match */
+ if (source_fmt->format.width != sink_fmt->format.width ||
+ source_fmt->format.height != sink_fmt->format.height)
+ return -EPIPE;
+
+ if (source_fmt->format.code != sink_fmt->format.code)
+ return -EPIPE;
+
+ return 0;
+}
+
+/*
+ * ipipe_init_formats - Initialize formats on all pads
+ * @sd: ISP IPIPE V4L2 subdevice
+ * @fh: V4L2 subdev file handle
+ *
+ * Initialize all pad formats with default values. If fh is not NULL, try
+ * formats are initialized on the file handle. Otherwise active formats are
+ * initialized on the device.
+ */
+static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_subdev_format format;
+
+ memset(&format, 0, sizeof(format));
+ format.pad = IPIPE_PAD_SINK;
+ format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+ format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format.format.width = 4096;
+ format.format.height = 4096;
+ ipipe_set_format(sd, fh, &format);
+
+ return 0;
+}
+
+/* V4L2 subdev video operations */
+static const struct v4l2_subdev_video_ops ipipe_v4l2_video_ops = {
+ .s_stream = ipipe_set_stream,
+};
+
+/* V4L2 subdev pad operations */
+static const struct v4l2_subdev_pad_ops ipipe_v4l2_pad_ops = {
+ .enum_mbus_code = ipipe_enum_mbus_code,
+ .enum_frame_size = ipipe_enum_frame_size,
+ .get_fmt = ipipe_get_format,
+ .set_fmt = ipipe_set_format,
+ .link_validate = ipipe_link_validate,
+};
+
+/* V4L2 subdev operations */
+static const struct v4l2_subdev_ops ipipe_v4l2_ops = {
+ .video = &ipipe_v4l2_video_ops,
+ .pad = &ipipe_v4l2_pad_ops,
+};
+
+/* V4L2 subdev internal operations */
+static const struct v4l2_subdev_internal_ops ipipe_v4l2_internal_ops = {
+ .open = ipipe_init_formats,
+};
+
+/* -----------------------------------------------------------------------------
+ * Media entity operations
+ */
+
+/*
+ * ipipe_link_setup - Setup IPIPE connections
+ * @entity: IPIPE media entity
+ * @local: Pad at the local end of the link
+ * @remote: Pad at the remote end of the link
+ * @flags: Link flags
+ *
+ * return -EINVAL or zero on success
+ */
+static int ipipe_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
+ struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd);
+ struct iss_device *iss = to_iss_device(ipipe);
+
+ switch (local->index | media_entity_type(remote->entity)) {
+ case IPIPE_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
+ /* Read from IPIPEIF. */
+ if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+ ipipe->input = IPIPE_INPUT_NONE;
+ break;
+ }
+
+ if (ipipe->input != IPIPE_INPUT_NONE)
+ return -EBUSY;
+
+ if (remote->entity == &iss->ipipeif.subdev.entity)
+ ipipe->input = IPIPE_INPUT_IPIPEIF;
+
+ break;
+
+ case IPIPE_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV:
+ /* Send to RESIZER */
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (ipipe->output & ~IPIPE_OUTPUT_VP)
+ return -EBUSY;
+ ipipe->output |= IPIPE_OUTPUT_VP;
+ } else {
+ ipipe->output &= ~IPIPE_OUTPUT_VP;
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* media operations */
+static const struct media_entity_operations ipipe_media_ops = {
+ .link_setup = ipipe_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+/*
+ * ipipe_init_entities - Initialize V4L2 subdev and media entity
+ * @ipipe: ISS ISP IPIPE module
+ *
+ * Return 0 on success and a negative error code on failure.
+ */
+static int ipipe_init_entities(struct iss_ipipe_device *ipipe)
+{
+ struct v4l2_subdev *sd = &ipipe->subdev;
+ struct media_pad *pads = ipipe->pads;
+ struct media_entity *me = &sd->entity;
+ int ret;
+
+ ipipe->input = IPIPE_INPUT_NONE;
+
+ v4l2_subdev_init(sd, &ipipe_v4l2_ops);
+ sd->internal_ops = &ipipe_v4l2_internal_ops;
+ strlcpy(sd->name, "OMAP4 ISS ISP IPIPE", sizeof(sd->name));
+ sd->grp_id = 1 << 16; /* group ID for iss subdevs */
+ v4l2_set_subdevdata(sd, ipipe);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ pads[IPIPE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ pads[IPIPE_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
+
+ me->ops = &ipipe_media_ops;
+ ret = media_entity_init(me, IPIPE_PADS_NUM, pads, 0);
+ if (ret < 0)
+ return ret;
+
+ ipipe_init_formats(sd, NULL);
+
+ return 0;
+}
+
+void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe)
+{
+ media_entity_cleanup(&ipipe->subdev.entity);
+
+ v4l2_device_unregister_subdev(&ipipe->subdev);
+}
+
+int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe,
+ struct v4l2_device *vdev)
+{
+ int ret;
+
+ /* Register the subdev and video node. */
+ ret = v4l2_device_register_subdev(vdev, &ipipe->subdev);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+
+error:
+ omap4iss_ipipe_unregister_entities(ipipe);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP IPIPE initialisation and cleanup
+ */
+
+/*
+ * omap4iss_ipipe_init - IPIPE module initialization.
+ * @iss: Device pointer specific to the OMAP4 ISS.
+ *
+ * TODO: Get the initialisation values from platform data.
+ *
+ * Return 0 on success or a negative error code otherwise.
+ */
+int omap4iss_ipipe_init(struct iss_device *iss)
+{
+ struct iss_ipipe_device *ipipe = &iss->ipipe;
+
+ ipipe->state = ISS_PIPELINE_STREAM_STOPPED;
+ init_waitqueue_head(&ipipe->wait);
+
+ return ipipe_init_entities(ipipe);
+}
+
+/*
+ * omap4iss_ipipe_cleanup - IPIPE module cleanup.
+ * @iss: Device pointer specific to the OMAP4 ISS.
+ */
+void omap4iss_ipipe_cleanup(struct iss_device *iss)
+{
+ /* FIXME: are you sure there's nothing to do? */
+}
new file mode 100644
@@ -0,0 +1,67 @@
+/*
+ * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef OMAP4_ISS_IPIPE_H
+#define OMAP4_ISS_IPIPE_H
+
+#include "iss_video.h"
+
+enum ipipe_input_entity {
+ IPIPE_INPUT_NONE,
+ IPIPE_INPUT_IPIPEIF,
+};
+
+#define IPIPE_OUTPUT_VP (1 << 0)
+
+/* Sink and source IPIPE pads */
+#define IPIPE_PAD_SINK 0
+#define IPIPE_PAD_SOURCE_VP 1
+#define IPIPE_PADS_NUM 2
+
+/*
+ * struct iss_ipipe_device - Structure for the IPIPE module to store its own
+ * information
+ * @subdev: V4L2 subdevice
+ * @pads: Sink and source media entity pads
+ * @formats: Active video formats
+ * @input: Active input
+ * @output: Active outputs
+ * @error: A hardware error occurred during capture
+ * @state: Streaming state
+ * @wait: Wait queue used to stop the module
+ * @stopping: Stopping state
+ */
+struct iss_ipipe_device {
+ struct v4l2_subdev subdev;
+ struct media_pad pads[IPIPE_PADS_NUM];
+ struct v4l2_mbus_framefmt formats[IPIPE_PADS_NUM];
+
+ enum ipipe_input_entity input;
+ unsigned int output;
+ unsigned int error;
+
+ enum iss_pipeline_stream_state state;
+ wait_queue_head_t wait;
+ atomic_t stopping;
+};
+
+struct iss_device;
+
+int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe,
+ struct v4l2_device *vdev);
+void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe);
+
+int omap4iss_ipipe_init(struct iss_device *iss);
+void omap4iss_ipipe_cleanup(struct iss_device *iss);
+
+#endif /* OMAP4_ISS_IPIPE_H */
new file mode 100644
@@ -0,0 +1,847 @@
+/*
+ * TI OMAP4 ISS V4L2 Driver - ISP IPIPEIF module
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/uaccess.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#include "iss.h"
+#include "iss_regs.h"
+#include "iss_ipipeif.h"
+
+static struct v4l2_mbus_framefmt *
+__ipipeif_get_format(struct iss_ipipeif_device *ipipeif, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which);
+
+static const unsigned int ipipeif_fmts[] = {
+ V4L2_MBUS_FMT_SGRBG10_1X10,
+ V4L2_MBUS_FMT_SRGGB10_1X10,
+ V4L2_MBUS_FMT_SBGGR10_1X10,
+ V4L2_MBUS_FMT_SGBRG10_1X10,
+ V4L2_MBUS_FMT_UYVY8_1X16,
+ V4L2_MBUS_FMT_YUYV8_1X16,
+};
+
+/*
+ * ipipeif_print_status - Print current IPIPEIF Module register values.
+ * @ipipeif: Pointer to ISS ISP IPIPEIF device.
+ *
+ * Also prints other debug information stored in the IPIPEIF module.
+ */
+#define IPIPEIF_PRINT_REGISTER(iss, name)\
+ dev_dbg(iss->dev, "###IPIPEIF " #name "=0x%08x\n", \
+ readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_##name))
+
+#define ISIF_PRINT_REGISTER(iss, name)\
+ dev_dbg(iss->dev, "###ISIF " #name "=0x%08x\n", \
+ readl(iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_##name))
+
+#define ISP5_PRINT_REGISTER(iss, name)\
+ dev_dbg(iss->dev, "###ISP5 " #name "=0x%08x\n", \
+ readl(iss->regs[OMAP4_ISS_MEM_ISP_SYS1] + ISP5_##name))
+
+static void ipipeif_print_status(struct iss_ipipeif_device *ipipeif)
+{
+ struct iss_device *iss = to_iss_device(ipipeif);
+
+ dev_dbg(iss->dev, "-------------IPIPEIF Register dump-------------\n");
+
+ IPIPEIF_PRINT_REGISTER(iss, CFG1);
+ IPIPEIF_PRINT_REGISTER(iss, CFG2);
+
+ ISIF_PRINT_REGISTER(iss, SYNCEN);
+ ISIF_PRINT_REGISTER(iss, CADU);
+ ISIF_PRINT_REGISTER(iss, CADL);
+ ISIF_PRINT_REGISTER(iss, MODESET);
+ ISIF_PRINT_REGISTER(iss, CCOLP);
+ ISIF_PRINT_REGISTER(iss, SPH);
+ ISIF_PRINT_REGISTER(iss, LNH);
+ ISIF_PRINT_REGISTER(iss, LNV);
+ ISIF_PRINT_REGISTER(iss, VDINT0);
+ ISIF_PRINT_REGISTER(iss, HSIZE);
+
+ ISP5_PRINT_REGISTER(iss, SYSCONFIG);
+ ISP5_PRINT_REGISTER(iss, CTRL);
+ ISP5_PRINT_REGISTER(iss, IRQSTATUS(0));
+ ISP5_PRINT_REGISTER(iss, IRQENABLE_SET(0));
+ ISP5_PRINT_REGISTER(iss, IRQENABLE_CLR(0));
+
+ dev_dbg(iss->dev, "-----------------------------------------------\n");
+}
+
+static void ipipeif_write_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
+{
+ struct iss_device *iss = to_iss_device(ipipeif);
+
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_SYNCEN) &
+ ~ISIF_SYNCEN_DWEN) |
+ enable ? ISIF_SYNCEN_DWEN : 0,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_SYNCEN);
+}
+
+/*
+ * ipipeif_enable - Enable/Disable IPIPEIF.
+ * @enable: enable flag
+ *
+ */
+static void ipipeif_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
+{
+ struct iss_device *iss = to_iss_device(ipipeif);
+
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_SYNCEN) &
+ ~ISIF_SYNCEN_SYEN) |
+ enable ? ISIF_SYNCEN_SYEN : 0,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_SYNCEN);
+}
+
+/* -----------------------------------------------------------------------------
+ * Format- and pipeline-related configuration helpers
+ */
+
+/*
+ * ipipeif_set_outaddr - Set memory address to save output image
+ * @ipipeif: Pointer to ISP IPIPEIF device.
+ * @addr: 32-bit memory address aligned on 32 byte boundary.
+ *
+ * Sets the memory address where the output will be saved.
+ */
+static void ipipeif_set_outaddr(struct iss_ipipeif_device *ipipeif, u32 addr)
+{
+ struct iss_device *iss = to_iss_device(ipipeif);
+
+ /* Save address splitted in Base Address H & L */
+ writel((addr >> (16 + 5)) & ISIF_CADU_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_CADU);
+ writel((addr >> 5) & ISIF_CADL_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_CADL);
+}
+
+static void ipipeif_configure(struct iss_ipipeif_device *ipipeif)
+{
+ struct iss_device *iss = to_iss_device(ipipeif);
+ struct v4l2_mbus_framefmt *format;
+ u32 isif_ccolp = 0;
+
+ omap4iss_configure_bridge(iss, ipipeif->input);
+
+ /* IPIPEIF_PAD_SINK */
+ format = &ipipeif->formats[IPIPEIF_PAD_SINK];
+
+ /* IPIPEIF with YUV422 input from ISIF */
+ writel(readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_CFG1) &
+ ~(IPIPEIF_CFG1_INPSRC1_MASK | IPIPEIF_CFG1_INPSRC2_MASK),
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_CFG1);
+
+ /* Select ISIF/IPIPEIF input format */
+ switch (format->code) {
+ case V4L2_MBUS_FMT_UYVY8_1X16:
+ case V4L2_MBUS_FMT_YUYV8_1X16:
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_MODESET) &
+ ~(ISIF_MODESET_CCDMD |
+ ISIF_MODESET_INPMOD_MASK |
+ ISIF_MODESET_CCDW_MASK)) |
+ ISIF_MODESET_INPMOD_YCBCR16,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_MODESET);
+
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_CFG2) &
+ ~IPIPEIF_CFG2_YUV8) |
+ IPIPEIF_CFG2_YUV16,
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_CFG2);
+
+ break;
+ case V4L2_MBUS_FMT_SGRBG10_1X10:
+ isif_ccolp = ISIF_CCOLP_CP0_F0_GR |
+ ISIF_CCOLP_CP1_F0_R |
+ ISIF_CCOLP_CP2_F0_B |
+ ISIF_CCOLP_CP3_F0_GB;
+ goto cont_raw;
+ case V4L2_MBUS_FMT_SRGGB10_1X10:
+ isif_ccolp = ISIF_CCOLP_CP0_F0_R |
+ ISIF_CCOLP_CP1_F0_GR |
+ ISIF_CCOLP_CP2_F0_GB |
+ ISIF_CCOLP_CP3_F0_B;
+ goto cont_raw;
+ case V4L2_MBUS_FMT_SBGGR10_1X10:
+ isif_ccolp = ISIF_CCOLP_CP0_F0_B |
+ ISIF_CCOLP_CP1_F0_GB |
+ ISIF_CCOLP_CP2_F0_GR |
+ ISIF_CCOLP_CP3_F0_R;
+ goto cont_raw;
+ case V4L2_MBUS_FMT_SGBRG10_1X10:
+ isif_ccolp = ISIF_CCOLP_CP0_F0_GB |
+ ISIF_CCOLP_CP1_F0_B |
+ ISIF_CCOLP_CP2_F0_R |
+ ISIF_CCOLP_CP3_F0_GR;
+cont_raw:
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_CFG2) &
+ ~IPIPEIF_CFG2_YUV16),
+ iss->regs[OMAP4_ISS_MEM_ISP_IPIPEIF] + IPIPEIF_CFG2);
+
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_MODESET) &
+ ~(ISIF_MODESET_CCDMD |
+ ISIF_MODESET_INPMOD_MASK |
+ ISIF_MODESET_CCDW_MASK)) |
+ ISIF_MODESET_INPMOD_RAW | ISIF_MODESET_CCDW_2BIT,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_MODESET);
+
+ writel((readl(iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_CGAMMAWD) &
+ ~ISIF_CGAMMAWD_GWDI_MASK) |
+ ISIF_CGAMMAWD_GWDI_BIT11,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_CGAMMAWD);
+
+ /* Set RAW Bayer pattern */
+ writel(isif_ccolp,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_CCOLP);
+ break;
+ }
+
+ writel(0 & ISIF_SPH_MASK, iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_SPH);
+ writel((format->width - 1) & ISIF_LNH_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_LNH);
+ writel((format->height - 1) & ISIF_LNV_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_LNV);
+
+ /* Generate ISIF0 on the last line of the image */
+ writel(format->height - 1,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_VDINT0);
+
+ /* IPIPEIF_PAD_SOURCE_ISIF_SF */
+ format = &ipipeif->formats[IPIPEIF_PAD_SOURCE_ISIF_SF];
+
+ writel((ipipeif->video_out.bpl_value >> 5) & ISIF_HSIZE_HSIZE_MASK,
+ iss->regs[OMAP4_ISS_MEM_ISP_ISIF] + ISIF_HSIZE);
+
+ /* IPIPEIF_PAD_SOURCE_VP */
+ /* Do nothing? */
+
+ omap4iss_isp_enable_interrupts(iss);
+}
+
+/* -----------------------------------------------------------------------------
+ * Interrupt handling
+ */
+
+static void ipipeif_isr_buffer(struct iss_ipipeif_device *ipipeif)
+{
+ struct iss_buffer *buffer;
+
+ ipipeif_write_enable(ipipeif, 0);
+
+ buffer = omap4iss_video_buffer_next(&ipipeif->video_out);
+ if (buffer == NULL)
+ return;
+
+ ipipeif_set_outaddr(ipipeif, buffer->iss_addr);
+
+ ipipeif_write_enable(ipipeif, 1);
+}
+
+/*
+ * ipipeif_isif0_isr - Handle ISIF0 event
+ * @ipipeif: Pointer to ISP IPIPEIF device.
+ *
+ * Executes LSC deferred enablement before next frame starts.
+ */
+static void ipipeif_isif0_isr(struct iss_ipipeif_device *ipipeif)
+{
+ struct iss_pipeline *pipe =
+ to_iss_pipeline(&ipipeif->subdev.entity);
+ if (pipe->do_propagation)
+ atomic_inc(&pipe->frame_number);
+
+ if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
+ ipipeif_isr_buffer(ipipeif);
+}
+
+/*
+ * omap4iss_ipipeif_isr - Configure ipipeif during interframe time.
+ * @ipipeif: Pointer to ISP IPIPEIF device.
+ * @events: IPIPEIF events
+ */
+void omap4iss_ipipeif_isr(struct iss_ipipeif_device *ipipeif, u32 events)
+{
+ if (omap4iss_module_sync_is_stopping(&ipipeif->wait, &ipipeif->stopping))
+ return;
+
+ if (events & ISP5_IRQ_ISIF0)
+ ipipeif_isif0_isr(ipipeif);
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP video operations
+ */
+
+static int ipipeif_video_queue(struct iss_video *video, struct iss_buffer *buffer)
+{
+ struct iss_ipipeif_device *ipipeif = container_of(video,
+ struct iss_ipipeif_device, video_out);
+
+ if (!(ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
+ return -ENODEV;
+
+ ipipeif_set_outaddr(ipipeif, buffer->iss_addr);
+
+ /*
+ * If streaming was enabled before there was a buffer queued
+ * or underrun happened in the ISR, the hardware was not enabled
+ * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
+ * Enable it now.
+ */
+ if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
+ if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
+ ipipeif_write_enable(ipipeif, 1);
+ ipipeif_enable(ipipeif, 1);
+ iss_video_dmaqueue_flags_clr(video);
+ }
+
+ return 0;
+}
+
+static const struct iss_video_operations ipipeif_video_ops = {
+ .queue = ipipeif_video_queue,
+};
+
+/* -----------------------------------------------------------------------------
+ * V4L2 subdev operations
+ */
+
+#define IPIPEIF_DRV_SUBCLK_MASK (OMAP4_ISS_ISP_SUBCLK_IPIPEIF |\
+ OMAP4_ISS_ISP_SUBCLK_ISIF)
+/*
+ * ipipeif_set_stream - Enable/Disable streaming on the IPIPEIF module
+ * @sd: ISP IPIPEIF V4L2 subdevice
+ * @enable: Enable/disable stream
+ */
+static int ipipeif_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
+ struct iss_device *iss = to_iss_device(ipipeif);
+ struct iss_video *video_out = &ipipeif->video_out;
+ int ret = 0;
+
+ if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED) {
+ if (enable == ISS_PIPELINE_STREAM_STOPPED)
+ return 0;
+
+ omap4iss_isp_subclk_enable(iss, IPIPEIF_DRV_SUBCLK_MASK);
+ }
+
+ switch (enable) {
+ case ISS_PIPELINE_STREAM_CONTINUOUS:
+
+ ipipeif_configure(ipipeif);
+ ipipeif_print_status(ipipeif);
+
+ /*
+ * When outputting to memory with no buffer available, let the
+ * buffer queue handler start the hardware. A DMA queue flag
+ * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
+ * a buffer available.
+ */
+ if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY &&
+ !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
+ break;
+
+ atomic_set(&ipipeif->stopping, 0);
+ if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
+ ipipeif_write_enable(ipipeif, 1);
+ ipipeif_enable(ipipeif, 1);
+ iss_video_dmaqueue_flags_clr(video_out);
+ break;
+
+ case ISS_PIPELINE_STREAM_STOPPED:
+ if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED)
+ return 0;
+ if (omap4iss_module_sync_idle(&sd->entity, &ipipeif->wait,
+ &ipipeif->stopping))
+ dev_dbg(iss->dev, "%s: module stop timeout.\n",
+ sd->name);
+
+ if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
+ ipipeif_write_enable(ipipeif, 0);
+ ipipeif_enable(ipipeif, 0);
+ omap4iss_isp_disable_interrupts(iss);
+ omap4iss_isp_subclk_disable(iss, IPIPEIF_DRV_SUBCLK_MASK);
+ iss_video_dmaqueue_flags_clr(video_out);
+ break;
+ }
+
+ ipipeif->state = enable;
+ return ret;
+}
+
+static struct v4l2_mbus_framefmt *
+__ipipeif_get_format(struct iss_ipipeif_device *ipipeif, struct v4l2_subdev_fh *fh,
+ unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(fh, pad);
+ else
+ return &ipipeif->formats[pad];
+}
+
+/*
+ * ipipeif_try_format - Try video format on a pad
+ * @ipipeif: ISS IPIPEIF device
+ * @fh : V4L2 subdev file handle
+ * @pad: Pad number
+ * @fmt: Format
+ */
+static void
+ipipeif_try_format(struct iss_ipipeif_device *ipipeif, struct v4l2_subdev_fh *fh,
+ unsigned int pad, struct v4l2_mbus_framefmt *fmt,
+ enum v4l2_subdev_format_whence which)
+{
+ struct v4l2_mbus_framefmt *format;
+ unsigned int width = fmt->width;
+ unsigned int height = fmt->height;
+ unsigned int i;
+
+ switch (pad) {
+ case IPIPEIF_PAD_SINK:
+ /* TODO: If the IPIPEIF output formatter pad is connected directly
+ * to the resizer, only YUV formats can be used.
+ */
+ for (i = 0; i < ARRAY_SIZE(ipipeif_fmts); i++) {
+ if (fmt->code == ipipeif_fmts[i])
+ break;
+ }
+
+ /* If not found, use SGRBG10 as default */
+ if (i >= ARRAY_SIZE(ipipeif_fmts))
+ fmt->code = V4L2_MBUS_FMT_SGRBG10_1X10;
+
+ /* Clamp the input size. */
+ fmt->width = clamp_t(u32, width, 1, 8192);
+ fmt->height = clamp_t(u32, height, 1, 8192);
+ break;
+
+ case IPIPEIF_PAD_SOURCE_ISIF_SF:
+ format = __ipipeif_get_format(ipipeif, fh, IPIPEIF_PAD_SINK, which);
+ memcpy(fmt, format, sizeof(*fmt));
+
+ /* The data formatter truncates the number of horizontal output
+ * pixels to a multiple of 16. To avoid clipping data, allow
+ * callers to request an output size bigger than the input size
+ * up to the nearest multiple of 16.
+ */
+ fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15);
+ fmt->width &= ~15;
+ fmt->height = clamp_t(u32, height, 32, fmt->height);
+ break;
+
+ case IPIPEIF_PAD_SOURCE_VP:
+ format = __ipipeif_get_format(ipipeif, fh, IPIPEIF_PAD_SINK, which);
+ memcpy(fmt, format, sizeof(*fmt));
+
+ fmt->width = clamp_t(u32, width, 32, fmt->width);
+ fmt->height = clamp_t(u32, height, 32, fmt->height);
+ break;
+ }
+
+ /* Data is written to memory unpacked, each 10-bit or 12-bit pixel is
+ * stored on 2 bytes.
+ */
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->field = V4L2_FIELD_NONE;
+}
+
+/*
+ * ipipeif_enum_mbus_code - Handle pixel format enumeration
+ * @sd : pointer to v4l2 subdev structure
+ * @fh : V4L2 subdev file handle
+ * @code : pointer to v4l2_subdev_mbus_code_enum structure
+ * return -EINVAL or zero on success
+ */
+static int ipipeif_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ switch (code->pad) {
+ case IPIPEIF_PAD_SINK:
+ if (code->index >= ARRAY_SIZE(ipipeif_fmts))
+ return -EINVAL;
+
+ code->code = ipipeif_fmts[code->index];
+ break;
+
+ case IPIPEIF_PAD_SOURCE_ISIF_SF:
+ case IPIPEIF_PAD_SOURCE_VP:
+ /* No format conversion inside IPIPEIF */
+ if (code->index != 0)
+ return -EINVAL;
+
+ format = __ipipeif_get_format(ipipeif, fh, IPIPEIF_PAD_SINK,
+ V4L2_SUBDEV_FORMAT_TRY);
+
+ code->code = format->code;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ipipeif_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt format;
+
+ if (fse->index != 0)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = 1;
+ format.height = 1;
+ ipipeif_try_format(ipipeif, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+ fse->min_width = format.width;
+ fse->min_height = format.height;
+
+ if (format.code != fse->code)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = -1;
+ format.height = -1;
+ ipipeif_try_format(ipipeif, fh, fse->pad, &format, V4L2_SUBDEV_FORMAT_TRY);
+ fse->max_width = format.width;
+ fse->max_height = format.height;
+
+ return 0;
+}
+
+/*
+ * ipipeif_get_format - Retrieve the video format on a pad
+ * @sd : ISP IPIPEIF V4L2 subdevice
+ * @fh : V4L2 subdev file handle
+ * @fmt: Format
+ *
+ * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
+ * to the format type.
+ */
+static int ipipeif_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __ipipeif_get_format(ipipeif, fh, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ fmt->format = *format;
+ return 0;
+}
+
+/*
+ * ipipeif_set_format - Set the video format on a pad
+ * @sd : ISP IPIPEIF V4L2 subdevice
+ * @fh : V4L2 subdev file handle
+ * @fmt: Format
+ *
+ * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
+ * to the format type.
+ */
+static int ipipeif_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __ipipeif_get_format(ipipeif, fh, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ ipipeif_try_format(ipipeif, fh, fmt->pad, &fmt->format, fmt->which);
+ *format = fmt->format;
+
+ /* Propagate the format from sink to source */
+ if (fmt->pad == IPIPEIF_PAD_SINK) {
+ format = __ipipeif_get_format(ipipeif, fh, IPIPEIF_PAD_SOURCE_ISIF_SF,
+ fmt->which);
+ *format = fmt->format;
+ ipipeif_try_format(ipipeif, fh, IPIPEIF_PAD_SOURCE_ISIF_SF, format,
+ fmt->which);
+
+ format = __ipipeif_get_format(ipipeif, fh, IPIPEIF_PAD_SOURCE_VP,
+ fmt->which);
+ *format = fmt->format;
+ ipipeif_try_format(ipipeif, fh, IPIPEIF_PAD_SOURCE_VP, format,
+ fmt->which);
+ }
+
+ return 0;
+}
+
+static int ipipeif_link_validate(struct v4l2_subdev *sd, struct media_link *link,
+ struct v4l2_subdev_format *source_fmt,
+ struct v4l2_subdev_format *sink_fmt)
+{
+ /* Check if the two ends match */
+ if (source_fmt->format.width != sink_fmt->format.width ||
+ source_fmt->format.height != sink_fmt->format.height)
+ return -EPIPE;
+
+ if (source_fmt->format.code != sink_fmt->format.code)
+ return -EPIPE;
+
+ return 0;
+}
+
+/*
+ * ipipeif_init_formats - Initialize formats on all pads
+ * @sd: ISP IPIPEIF V4L2 subdevice
+ * @fh: V4L2 subdev file handle
+ *
+ * Initialize all pad formats with default values. If fh is not NULL, try
+ * formats are initialized on the file handle. Otherwise active formats are
+ * initialized on the device.
+ */
+static int ipipeif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_subdev_format format;
+
+ memset(&format, 0, sizeof(format));
+ format.pad = IPIPEIF_PAD_SINK;
+ format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
+ format.format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
+ format.format.width = 4096;
+ format.format.height = 4096;
+ ipipeif_set_format(sd, fh, &format);
+
+ return 0;
+}
+
+/* V4L2 subdev video operations */
+static const struct v4l2_subdev_video_ops ipipeif_v4l2_video_ops = {
+ .s_stream = ipipeif_set_stream,
+};
+
+/* V4L2 subdev pad operations */
+static const struct v4l2_subdev_pad_ops ipipeif_v4l2_pad_ops = {
+ .enum_mbus_code = ipipeif_enum_mbus_code,
+ .enum_frame_size = ipipeif_enum_frame_size,
+ .get_fmt = ipipeif_get_format,
+ .set_fmt = ipipeif_set_format,
+ .link_validate = ipipeif_link_validate,
+};
+
+/* V4L2 subdev operations */
+static const struct v4l2_subdev_ops ipipeif_v4l2_ops = {
+ .video = &ipipeif_v4l2_video_ops,
+ .pad = &ipipeif_v4l2_pad_ops,
+};
+
+/* V4L2 subdev internal operations */
+static const struct v4l2_subdev_internal_ops ipipeif_v4l2_internal_ops = {
+ .open = ipipeif_init_formats,
+};
+
+/* -----------------------------------------------------------------------------
+ * Media entity operations
+ */
+
+/*
+ * ipipeif_link_setup - Setup IPIPEIF connections
+ * @entity: IPIPEIF media entity
+ * @local: Pad at the local end of the link
+ * @remote: Pad at the remote end of the link
+ * @flags: Link flags
+ *
+ * return -EINVAL or zero on success
+ */
+static int ipipeif_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
+ struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
+ struct iss_device *iss = to_iss_device(ipipeif);
+
+ switch (local->index | media_entity_type(remote->entity)) {
+ case IPIPEIF_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV:
+ /* Read from the sensor CSI2a or CSI2b. */
+ if (!(flags & MEDIA_LNK_FL_ENABLED)) {
+ ipipeif->input = IPIPEIF_INPUT_NONE;
+ break;
+ }
+
+ if (ipipeif->input != IPIPEIF_INPUT_NONE)
+ return -EBUSY;
+
+ if (remote->entity == &iss->csi2a.subdev.entity)
+ ipipeif->input = IPIPEIF_INPUT_CSI2A;
+ else if (remote->entity == &iss->csi2b.subdev.entity)
+ ipipeif->input = IPIPEIF_INPUT_CSI2B;
+
+ break;
+
+ case IPIPEIF_PAD_SOURCE_ISIF_SF | MEDIA_ENT_T_DEVNODE:
+ /* Write to memory */
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (ipipeif->output & ~IPIPEIF_OUTPUT_MEMORY)
+ return -EBUSY;
+ ipipeif->output |= IPIPEIF_OUTPUT_MEMORY;
+ } else {
+ ipipeif->output &= ~IPIPEIF_OUTPUT_MEMORY;
+ }
+ break;
+
+ case IPIPEIF_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV:
+ /* Send to IPIPE/RESIZER */
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (ipipeif->output & ~IPIPEIF_OUTPUT_VP)
+ return -EBUSY;
+ ipipeif->output |= IPIPEIF_OUTPUT_VP;
+ } else {
+ ipipeif->output &= ~IPIPEIF_OUTPUT_VP;
+ }
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* media operations */
+static const struct media_entity_operations ipipeif_media_ops = {
+ .link_setup = ipipeif_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+/*
+ * ipipeif_init_entities - Initialize V4L2 subdev and media entity
+ * @ipipeif: ISS ISP IPIPEIF module
+ *
+ * Return 0 on success and a negative error code on failure.
+ */
+static int ipipeif_init_entities(struct iss_ipipeif_device *ipipeif)
+{
+ struct v4l2_subdev *sd = &ipipeif->subdev;
+ struct media_pad *pads = ipipeif->pads;
+ struct media_entity *me = &sd->entity;
+ int ret;
+
+ ipipeif->input = IPIPEIF_INPUT_NONE;
+
+ v4l2_subdev_init(sd, &ipipeif_v4l2_ops);
+ sd->internal_ops = &ipipeif_v4l2_internal_ops;
+ strlcpy(sd->name, "OMAP4 ISS ISP IPIPEIF", sizeof(sd->name));
+ sd->grp_id = 1 << 16; /* group ID for iss subdevs */
+ v4l2_set_subdevdata(sd, ipipeif);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ pads[IPIPEIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ pads[IPIPEIF_PAD_SOURCE_ISIF_SF].flags = MEDIA_PAD_FL_SOURCE;
+ pads[IPIPEIF_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
+
+ me->ops = &ipipeif_media_ops;
+ ret = media_entity_init(me, IPIPEIF_PADS_NUM, pads, 0);
+ if (ret < 0)
+ return ret;
+
+ ipipeif_init_formats(sd, NULL);
+
+ ipipeif->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ ipipeif->video_out.ops = &ipipeif_video_ops;
+ ipipeif->video_out.iss = to_iss_device(ipipeif);
+ ipipeif->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
+ ipipeif->video_out.bpl_alignment = 32;
+ ipipeif->video_out.bpl_zero_padding = 1;
+ ipipeif->video_out.bpl_max = 0x1ffe0;
+
+ ret = omap4iss_video_init(&ipipeif->video_out, "ISP IPIPEIF");
+ if (ret < 0)
+ return ret;
+
+ /* Connect the IPIPEIF subdev to the video node. */
+ ret = media_entity_create_link(&ipipeif->subdev.entity, IPIPEIF_PAD_SOURCE_ISIF_SF,
+ &ipipeif->video_out.video.entity, 0, 0);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+void omap4iss_ipipeif_unregister_entities(struct iss_ipipeif_device *ipipeif)
+{
+ media_entity_cleanup(&ipipeif->subdev.entity);
+
+ v4l2_device_unregister_subdev(&ipipeif->subdev);
+ omap4iss_video_unregister(&ipipeif->video_out);
+}
+
+int omap4iss_ipipeif_register_entities(struct iss_ipipeif_device *ipipeif,
+ struct v4l2_device *vdev)
+{
+ int ret;
+
+ /* Register the subdev and video node. */
+ ret = v4l2_device_register_subdev(vdev, &ipipeif->subdev);
+ if (ret < 0)
+ goto error;
+
+ ret = omap4iss_video_register(&ipipeif->video_out, vdev);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+
+error:
+ omap4iss_ipipeif_unregister_entities(ipipeif);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP IPIPEIF initialisation and cleanup
+ */
+
+/*
+ * omap4iss_ipipeif_init - IPIPEIF module initialization.
+ * @iss: Device pointer specific to the OMAP4 ISS.
+ *
+ * TODO: Get the initialisation values from platform data.
+ *
+ * Return 0 on success or a negative error code otherwise.
+ */
+int omap4iss_ipipeif_init(struct iss_device *iss)
+{
+ struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
+
+ ipipeif->state = ISS_PIPELINE_STREAM_STOPPED;
+ init_waitqueue_head(&ipipeif->wait);
+
+ return ipipeif_init_entities(ipipeif);
+}
+
+/*
+ * omap4iss_ipipeif_cleanup - IPIPEIF module cleanup.
+ * @iss: Device pointer specific to the OMAP4 ISS.
+ */
+void omap4iss_ipipeif_cleanup(struct iss_device *iss)
+{
+ /* FIXME: are you sure there's nothing to do? */
+}
new file mode 100644
@@ -0,0 +1,92 @@
+/*
+ * TI OMAP4 ISS V4L2 Driver - ISP IPIPEIF module
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef OMAP4_ISS_IPIPEIF_H
+#define OMAP4_ISS_IPIPEIF_H
+
+#include "iss_video.h"
+
+enum ipipeif_input_entity {
+ IPIPEIF_INPUT_NONE,
+ IPIPEIF_INPUT_CSI2A,
+ IPIPEIF_INPUT_CSI2B
+};
+
+#define IPIPEIF_OUTPUT_MEMORY (1 << 0)
+#define IPIPEIF_OUTPUT_VP (1 << 1)
+
+/* Sink and source IPIPEIF pads */
+#define IPIPEIF_PAD_SINK 0
+#define IPIPEIF_PAD_SOURCE_ISIF_SF 1
+#define IPIPEIF_PAD_SOURCE_VP 2
+#define IPIPEIF_PADS_NUM 3
+
+/*
+ * struct iss_ipipeif_device - Structure for the IPIPEIF module to store its own
+ * information
+ * @subdev: V4L2 subdevice
+ * @pads: Sink and source media entity pads
+ * @formats: Active video formats
+ * @input: Active input
+ * @output: Active outputs
+ * @video_out: Output video node
+ * @error: A hardware error occurred during capture
+ * @alaw: A-law compression enabled (1) or disabled (0)
+ * @lpf: Low pass filter enabled (1) or disabled (0)
+ * @obclamp: Optical-black clamp enabled (1) or disabled (0)
+ * @fpc_en: Faulty pixels correction enabled (1) or disabled (0)
+ * @blcomp: Black level compensation configuration
+ * @clamp: Optical-black or digital clamp configuration
+ * @fpc: Faulty pixels correction configuration
+ * @lsc: Lens shading compensation configuration
+ * @update: Bitmask of controls to update during the next interrupt
+ * @shadow_update: Controls update in progress by userspace
+ * @syncif: Interface synchronization configuration
+ * @vpcfg: Video port configuration
+ * @underrun: A buffer underrun occurred and a new buffer has been queued
+ * @state: Streaming state
+ * @lock: Serializes shadow_update with interrupt handler
+ * @wait: Wait queue used to stop the module
+ * @stopping: Stopping state
+ * @ioctl_lock: Serializes ioctl calls and LSC requests freeing
+ */
+struct iss_ipipeif_device {
+ struct v4l2_subdev subdev;
+ struct media_pad pads[IPIPEIF_PADS_NUM];
+ struct v4l2_mbus_framefmt formats[IPIPEIF_PADS_NUM];
+
+ enum ipipeif_input_entity input;
+ unsigned int output;
+ struct iss_video video_out;
+ unsigned int error;
+
+ enum iss_pipeline_stream_state state;
+ wait_queue_head_t wait;
+ atomic_t stopping;
+};
+
+struct iss_device;
+
+int omap4iss_ipipeif_init(struct iss_device *iss);
+void omap4iss_ipipeif_cleanup(struct iss_device *iss);
+int omap4iss_ipipeif_register_entities(struct iss_ipipeif_device *ipipeif,
+ struct v4l2_device *vdev);
+void omap4iss_ipipeif_unregister_entities(struct iss_ipipeif_device *ipipeif);
+
+int omap4iss_ipipeif_busy(struct iss_ipipeif_device *ipipeif);
+void omap4iss_ipipeif_isr(struct iss_ipipeif_device *ipipeif, u32 events);
+void omap4iss_ipipeif_restore_context(struct iss_device *iss);
+void omap4iss_ipipeif_max_rate(struct iss_ipipeif_device *ipipeif,
+ unsigned int *max_rate);
+
+#endif /* OMAP4_ISS_IPIPEIF_H */