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- /*
- * TI OMAP4 ISS V4L2 Driver
- *
- * Copyright (C) 2012, Texas Instruments
- *
- * 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/clk.h>
- #include <linux/delay.h>
- #include <linux/device.h>
- #include <linux/dma-mapping.h>
- #include <linux/i2c.h>
- #include <linux/interrupt.h>
- #include <linux/mfd/syscon.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <linux/slab.h>
- #include <linux/sched.h>
- #include <linux/vmalloc.h>
- #include <media/v4l2-common.h>
- #include <media/v4l2-device.h>
- #include <media/v4l2-ctrls.h>
- #include "iss.h"
- #include "iss_regs.h"
- #define ISS_PRINT_REGISTER(iss, name)\
- dev_dbg(iss->dev, "###ISS " #name "=0x%08x\n", \
- iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_##name))
- static void iss_print_status(struct iss_device *iss)
- {
- dev_dbg(iss->dev, "-------------ISS HL Register dump-------------\n");
- ISS_PRINT_REGISTER(iss, HL_REVISION);
- ISS_PRINT_REGISTER(iss, HL_SYSCONFIG);
- ISS_PRINT_REGISTER(iss, HL_IRQSTATUS(5));
- ISS_PRINT_REGISTER(iss, HL_IRQENABLE_SET(5));
- ISS_PRINT_REGISTER(iss, HL_IRQENABLE_CLR(5));
- ISS_PRINT_REGISTER(iss, CTRL);
- ISS_PRINT_REGISTER(iss, CLKCTRL);
- ISS_PRINT_REGISTER(iss, CLKSTAT);
- dev_dbg(iss->dev, "-----------------------------------------------\n");
- }
- /*
- * omap4iss_flush - Post pending L3 bus writes by doing a register readback
- * @iss: OMAP4 ISS device
- *
- * In order to force posting of pending writes, we need to write and
- * readback the same register, in this case the revision register.
- *
- * See this link for reference:
- * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
- */
- void omap4iss_flush(struct iss_device *iss)
- {
- iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION, 0);
- iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
- }
- /*
- * iss_isp_enable_interrupts - Enable ISS ISP interrupts.
- * @iss: OMAP4 ISS device
- */
- static void omap4iss_isp_enable_interrupts(struct iss_device *iss)
- {
- static const u32 isp_irq = ISP5_IRQ_OCP_ERR |
- ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
- ISP5_IRQ_RSZ_FIFO_OVF |
- ISP5_IRQ_RSZ_INT_DMA |
- ISP5_IRQ_ISIF_INT(0);
- /* Enable ISP interrupts */
- iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0), isp_irq);
- iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_SET(0),
- isp_irq);
- }
- /*
- * iss_isp_disable_interrupts - Disable ISS interrupts.
- * @iss: OMAP4 ISS device
- */
- static void omap4iss_isp_disable_interrupts(struct iss_device *iss)
- {
- iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_CLR(0), ~0);
- }
- /*
- * iss_enable_interrupts - Enable ISS interrupts.
- * @iss: OMAP4 ISS device
- */
- static void iss_enable_interrupts(struct iss_device *iss)
- {
- static const u32 hl_irq = ISS_HL_IRQ_CSIA | ISS_HL_IRQ_CSIB
- | ISS_HL_IRQ_ISP(0);
- /* Enable HL interrupts */
- iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), hl_irq);
- iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_SET(5), hl_irq);
- if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
- omap4iss_isp_enable_interrupts(iss);
- }
- /*
- * iss_disable_interrupts - Disable ISS interrupts.
- * @iss: OMAP4 ISS device
- */
- static void iss_disable_interrupts(struct iss_device *iss)
- {
- if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
- omap4iss_isp_disable_interrupts(iss);
- iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_CLR(5), ~0);
- }
- int omap4iss_get_external_info(struct iss_pipeline *pipe,
- struct media_link *link)
- {
- struct iss_device *iss =
- container_of(pipe, struct iss_video, pipe)->iss;
- struct v4l2_subdev_format fmt;
- struct v4l2_ctrl *ctrl;
- int ret;
- if (!pipe->external)
- return 0;
- if (pipe->external_rate)
- return 0;
- memset(&fmt, 0, sizeof(fmt));
- fmt.pad = link->source->index;
- fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
- ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(link->sink->entity),
- pad, get_fmt, NULL, &fmt);
- if (ret < 0)
- return -EPIPE;
- pipe->external_bpp = omap4iss_video_format_info(fmt.format.code)->bpp;
- ctrl = v4l2_ctrl_find(pipe->external->ctrl_handler,
- V4L2_CID_PIXEL_RATE);
- if (!ctrl) {
- dev_warn(iss->dev, "no pixel rate control in subdev %s\n",
- pipe->external->name);
- return -EPIPE;
- }
- pipe->external_rate = v4l2_ctrl_g_ctrl_int64(ctrl);
- return 0;
- }
- /*
- * Configure the bridge. Valid inputs are
- *
- * IPIPEIF_INPUT_CSI2A: CSI2a receiver
- * IPIPEIF_INPUT_CSI2B: CSI2b receiver
- *
- * The bridge and lane shifter are configured according to the selected input
- * and the ISP platform data.
- */
- void omap4iss_configure_bridge(struct iss_device *iss,
- enum ipipeif_input_entity input)
- {
- u32 issctrl_val;
- u32 isp5ctrl_val;
- issctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL);
- issctrl_val &= ~ISS_CTRL_INPUT_SEL_MASK;
- issctrl_val &= ~ISS_CTRL_CLK_DIV_MASK;
- isp5ctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL);
- switch (input) {
- case IPIPEIF_INPUT_CSI2A:
- issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2A;
- break;
- case IPIPEIF_INPUT_CSI2B:
- issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2B;
- break;
- default:
- return;
- }
- issctrl_val |= ISS_CTRL_SYNC_DETECT_VS_RAISING;
- isp5ctrl_val |= ISP5_CTRL_VD_PULSE_EXT | ISP5_CTRL_PSYNC_CLK_SEL |
- ISP5_CTRL_SYNC_ENABLE;
- iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL, issctrl_val);
- iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, isp5ctrl_val);
- }
- #ifdef ISS_ISR_DEBUG
- static void iss_isr_dbg(struct iss_device *iss, u32 irqstatus)
- {
- static const char * const name[] = {
- "ISP_0",
- "ISP_1",
- "ISP_2",
- "ISP_3",
- "CSIA",
- "CSIB",
- "CCP2_0",
- "CCP2_1",
- "CCP2_2",
- "CCP2_3",
- "CBUFF",
- "BTE",
- "SIMCOP_0",
- "SIMCOP_1",
- "SIMCOP_2",
- "SIMCOP_3",
- "CCP2_8",
- "HS_VS",
- "18",
- "19",
- "20",
- "21",
- "22",
- "23",
- "24",
- "25",
- "26",
- "27",
- "28",
- "29",
- "30",
- "31",
- };
- unsigned int i;
- dev_dbg(iss->dev, "ISS IRQ: ");
- for (i = 0; i < ARRAY_SIZE(name); i++) {
- if ((1 << i) & irqstatus)
- pr_cont("%s ", name[i]);
- }
- pr_cont("\n");
- }
- static void iss_isp_isr_dbg(struct iss_device *iss, u32 irqstatus)
- {
- static const char * const name[] = {
- "ISIF_0",
- "ISIF_1",
- "ISIF_2",
- "ISIF_3",
- "IPIPEREQ",
- "IPIPELAST_PIX",
- "IPIPEDMA",
- "IPIPEBSC",
- "IPIPEHST",
- "IPIPEIF",
- "AEW",
- "AF",
- "H3A",
- "RSZ_REG",
- "RSZ_LAST_PIX",
- "RSZ_DMA",
- "RSZ_CYC_RZA",
- "RSZ_CYC_RZB",
- "RSZ_FIFO_OVF",
- "RSZ_FIFO_IN_BLK_ERR",
- "20",
- "21",
- "RSZ_EOF0",
- "RSZ_EOF1",
- "H3A_EOF",
- "IPIPE_EOF",
- "26",
- "IPIPE_DPC_INI",
- "IPIPE_DPC_RNEW0",
- "IPIPE_DPC_RNEW1",
- "30",
- "OCP_ERR",
- };
- unsigned int i;
- dev_dbg(iss->dev, "ISP IRQ: ");
- for (i = 0; i < ARRAY_SIZE(name); i++) {
- if ((1 << i) & irqstatus)
- pr_cont("%s ", name[i]);
- }
- pr_cont("\n");
- }
- #endif
- /*
- * iss_isr - Interrupt Service Routine for ISS module.
- * @irq: Not used currently.
- * @_iss: Pointer to the OMAP4 ISS device
- *
- * Handles the corresponding callback if plugged in.
- *
- * Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
- * IRQ wasn't handled.
- */
- static irqreturn_t iss_isr(int irq, void *_iss)
- {
- static const u32 ipipeif_events = ISP5_IRQ_IPIPEIF_IRQ |
- ISP5_IRQ_ISIF_INT(0);
- static const u32 resizer_events = ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
- ISP5_IRQ_RSZ_FIFO_OVF |
- ISP5_IRQ_RSZ_INT_DMA;
- struct iss_device *iss = _iss;
- u32 irqstatus;
- irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5));
- iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), irqstatus);
- if (irqstatus & ISS_HL_IRQ_CSIA)
- omap4iss_csi2_isr(&iss->csi2a);
- if (irqstatus & ISS_HL_IRQ_CSIB)
- omap4iss_csi2_isr(&iss->csi2b);
- if (irqstatus & ISS_HL_IRQ_ISP(0)) {
- u32 isp_irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1,
- ISP5_IRQSTATUS(0));
- iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0),
- isp_irqstatus);
- if (isp_irqstatus & ISP5_IRQ_OCP_ERR)
- dev_dbg(iss->dev, "ISP5 OCP Error!\n");
- if (isp_irqstatus & ipipeif_events) {
- omap4iss_ipipeif_isr(&iss->ipipeif,
- isp_irqstatus & ipipeif_events);
- }
- if (isp_irqstatus & resizer_events)
- omap4iss_resizer_isr(&iss->resizer,
- isp_irqstatus & resizer_events);
- #ifdef ISS_ISR_DEBUG
- iss_isp_isr_dbg(iss, isp_irqstatus);
- #endif
- }
- omap4iss_flush(iss);
- #ifdef ISS_ISR_DEBUG
- iss_isr_dbg(iss, irqstatus);
- #endif
- return IRQ_HANDLED;
- }
- /* -----------------------------------------------------------------------------
- * Pipeline power management
- *
- * Entities must be powered up when part of a pipeline that contains at least
- * one open video device node.
- *
- * To achieve this use the entity use_count field to track the number of users.
- * For entities corresponding to video device nodes the use_count field stores
- * the users count of the node. For entities corresponding to subdevs the
- * use_count field stores the total number of users of all video device nodes
- * in the pipeline.
- *
- * The omap4iss_pipeline_pm_use() function must be called in the open() and
- * close() handlers of video device nodes. It increments or decrements the use
- * count of all subdev entities in the pipeline.
- *
- * To react to link management on powered pipelines, the link setup notification
- * callback updates the use count of all entities in the source and sink sides
- * of the link.
- */
- /*
- * iss_pipeline_pm_use_count - Count the number of users of a pipeline
- * @entity: The entity
- *
- * Return the total number of users of all video device nodes in the pipeline.
- */
- static int iss_pipeline_pm_use_count(struct media_entity *entity)
- {
- struct media_entity_graph graph;
- int use = 0;
- media_entity_graph_walk_start(&graph, entity);
- while ((entity = media_entity_graph_walk_next(&graph))) {
- if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
- use += entity->use_count;
- }
- return use;
- }
- /*
- * iss_pipeline_pm_power_one - Apply power change to an entity
- * @entity: The entity
- * @change: Use count change
- *
- * Change the entity use count by @change. If the entity is a subdev update its
- * power state by calling the core::s_power operation when the use count goes
- * from 0 to != 0 or from != 0 to 0.
- *
- * Return 0 on success or a negative error code on failure.
- */
- static int iss_pipeline_pm_power_one(struct media_entity *entity, int change)
- {
- struct v4l2_subdev *subdev;
- subdev = media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV
- ? media_entity_to_v4l2_subdev(entity) : NULL;
- if (entity->use_count == 0 && change > 0 && subdev) {
- int ret;
- ret = v4l2_subdev_call(subdev, core, s_power, 1);
- if (ret < 0 && ret != -ENOIOCTLCMD)
- return ret;
- }
- entity->use_count += change;
- WARN_ON(entity->use_count < 0);
- if (entity->use_count == 0 && change < 0 && subdev)
- v4l2_subdev_call(subdev, core, s_power, 0);
- return 0;
- }
- /*
- * iss_pipeline_pm_power - Apply power change to all entities in a pipeline
- * @entity: The entity
- * @change: Use count change
- *
- * Walk the pipeline to update the use count and the power state of all non-node
- * entities.
- *
- * Return 0 on success or a negative error code on failure.
- */
- static int iss_pipeline_pm_power(struct media_entity *entity, int change)
- {
- struct media_entity_graph graph;
- struct media_entity *first = entity;
- int ret = 0;
- if (!change)
- return 0;
- media_entity_graph_walk_start(&graph, entity);
- while (!ret && (entity = media_entity_graph_walk_next(&graph)))
- if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
- ret = iss_pipeline_pm_power_one(entity, change);
- if (!ret)
- return 0;
- media_entity_graph_walk_start(&graph, first);
- while ((first = media_entity_graph_walk_next(&graph)) &&
- first != entity)
- if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE)
- iss_pipeline_pm_power_one(first, -change);
- return ret;
- }
- /*
- * omap4iss_pipeline_pm_use - Update the use count of an entity
- * @entity: The entity
- * @use: Use (1) or stop using (0) the entity
- *
- * Update the use count of all entities in the pipeline and power entities on or
- * off accordingly.
- *
- * Return 0 on success or a negative error code on failure. Powering entities
- * off is assumed to never fail. No failure can occur when the use parameter is
- * set to 0.
- */
- int omap4iss_pipeline_pm_use(struct media_entity *entity, int use)
- {
- int change = use ? 1 : -1;
- int ret;
- mutex_lock(&entity->parent->graph_mutex);
- /* Apply use count to node. */
- entity->use_count += change;
- WARN_ON(entity->use_count < 0);
- /* Apply power change to connected non-nodes. */
- ret = iss_pipeline_pm_power(entity, change);
- if (ret < 0)
- entity->use_count -= change;
- mutex_unlock(&entity->parent->graph_mutex);
- return ret;
- }
- /*
- * iss_pipeline_link_notify - Link management notification callback
- * @link: The link
- * @flags: New link flags that will be applied
- *
- * React to link management on powered pipelines by updating the use count of
- * all entities in the source and sink sides of the link. Entities are powered
- * on or off accordingly.
- *
- * Return 0 on success or a negative error code on failure. Powering entities
- * off is assumed to never fail. This function will not fail for disconnection
- * events.
- */
- static int iss_pipeline_link_notify(struct media_link *link, u32 flags,
- unsigned int notification)
- {
- struct media_entity *source = link->source->entity;
- struct media_entity *sink = link->sink->entity;
- int source_use = iss_pipeline_pm_use_count(source);
- int sink_use = iss_pipeline_pm_use_count(sink);
- int ret;
- if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
- !(link->flags & MEDIA_LNK_FL_ENABLED)) {
- /* Powering off entities is assumed to never fail. */
- iss_pipeline_pm_power(source, -sink_use);
- iss_pipeline_pm_power(sink, -source_use);
- return 0;
- }
- if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
- (flags & MEDIA_LNK_FL_ENABLED)) {
- ret = iss_pipeline_pm_power(source, sink_use);
- if (ret < 0)
- return ret;
- ret = iss_pipeline_pm_power(sink, source_use);
- if (ret < 0)
- iss_pipeline_pm_power(source, -sink_use);
- return ret;
- }
- return 0;
- }
- /* -----------------------------------------------------------------------------
- * Pipeline stream management
- */
- /*
- * iss_pipeline_disable - Disable streaming on a pipeline
- * @pipe: ISS pipeline
- * @until: entity at which to stop pipeline walk
- *
- * Walk the entities chain starting at the pipeline output video node and stop
- * all modules in the chain. Wait synchronously for the modules to be stopped if
- * necessary.
- *
- * If the until argument isn't NULL, stop the pipeline walk when reaching the
- * until entity. This is used to disable a partially started pipeline due to a
- * subdev start error.
- */
- static int iss_pipeline_disable(struct iss_pipeline *pipe,
- struct media_entity *until)
- {
- struct iss_device *iss = pipe->output->iss;
- struct media_entity *entity;
- struct media_pad *pad;
- struct v4l2_subdev *subdev;
- int failure = 0;
- int ret;
- entity = &pipe->output->video.entity;
- while (1) {
- pad = &entity->pads[0];
- if (!(pad->flags & MEDIA_PAD_FL_SINK))
- break;
- pad = media_entity_remote_pad(pad);
- if (!pad ||
- media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
- break;
- entity = pad->entity;
- if (entity == until)
- break;
- subdev = media_entity_to_v4l2_subdev(entity);
- ret = v4l2_subdev_call(subdev, video, s_stream, 0);
- if (ret < 0) {
- dev_dbg(iss->dev, "%s: module stop timeout.\n",
- subdev->name);
- /* If the entity failed to stopped, assume it has
- * crashed. Mark it as such, the ISS will be reset when
- * applications will release it.
- */
- iss->crashed |= 1U << subdev->entity.id;
- failure = -ETIMEDOUT;
- }
- }
- return failure;
- }
- /*
- * iss_pipeline_enable - Enable streaming on a pipeline
- * @pipe: ISS pipeline
- * @mode: Stream mode (single shot or continuous)
- *
- * Walk the entities chain starting at the pipeline output video node and start
- * all modules in the chain in the given mode.
- *
- * Return 0 if successful, or the return value of the failed video::s_stream
- * operation otherwise.
- */
- static int iss_pipeline_enable(struct iss_pipeline *pipe,
- enum iss_pipeline_stream_state mode)
- {
- struct iss_device *iss = pipe->output->iss;
- struct media_entity *entity;
- struct media_pad *pad;
- struct v4l2_subdev *subdev;
- unsigned long flags;
- int ret;
- /* If one of the entities in the pipeline has crashed it will not work
- * properly. Refuse to start streaming in that case. This check must be
- * performed before the loop below to avoid starting entities if the
- * pipeline won't start anyway (those entities would then likely fail to
- * stop, making the problem worse).
- */
- if (pipe->entities & iss->crashed)
- return -EIO;
- spin_lock_irqsave(&pipe->lock, flags);
- pipe->state &= ~(ISS_PIPELINE_IDLE_INPUT | ISS_PIPELINE_IDLE_OUTPUT);
- spin_unlock_irqrestore(&pipe->lock, flags);
- pipe->do_propagation = false;
- entity = &pipe->output->video.entity;
- while (1) {
- pad = &entity->pads[0];
- if (!(pad->flags & MEDIA_PAD_FL_SINK))
- break;
- pad = media_entity_remote_pad(pad);
- if (!pad ||
- media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
- break;
- entity = pad->entity;
- subdev = media_entity_to_v4l2_subdev(entity);
- ret = v4l2_subdev_call(subdev, video, s_stream, mode);
- if (ret < 0 && ret != -ENOIOCTLCMD) {
- iss_pipeline_disable(pipe, entity);
- return ret;
- }
- if (subdev == &iss->csi2a.subdev ||
- subdev == &iss->csi2b.subdev)
- pipe->do_propagation = true;
- }
- iss_print_status(pipe->output->iss);
- return 0;
- }
- /*
- * omap4iss_pipeline_set_stream - Enable/disable streaming on a pipeline
- * @pipe: ISS pipeline
- * @state: Stream state (stopped, single shot or continuous)
- *
- * Set the pipeline to the given stream state. Pipelines can be started in
- * single-shot or continuous mode.
- *
- * Return 0 if successful, or the return value of the failed video::s_stream
- * operation otherwise. The pipeline state is not updated when the operation
- * fails, except when stopping the pipeline.
- */
- int omap4iss_pipeline_set_stream(struct iss_pipeline *pipe,
- enum iss_pipeline_stream_state state)
- {
- int ret;
- if (state == ISS_PIPELINE_STREAM_STOPPED)
- ret = iss_pipeline_disable(pipe, NULL);
- else
- ret = iss_pipeline_enable(pipe, state);
- if (ret == 0 || state == ISS_PIPELINE_STREAM_STOPPED)
- pipe->stream_state = state;
- return ret;
- }
- /*
- * omap4iss_pipeline_cancel_stream - Cancel stream on a pipeline
- * @pipe: ISS pipeline
- *
- * Cancelling a stream mark all buffers on all video nodes in the pipeline as
- * erroneous and makes sure no new buffer can be queued. This function is called
- * when a fatal error that prevents any further operation on the pipeline
- * occurs.
- */
- void omap4iss_pipeline_cancel_stream(struct iss_pipeline *pipe)
- {
- if (pipe->input)
- omap4iss_video_cancel_stream(pipe->input);
- if (pipe->output)
- omap4iss_video_cancel_stream(pipe->output);
- }
- /*
- * iss_pipeline_is_last - Verify if entity has an enabled link to the output
- * video node
- * @me: ISS module's media entity
- *
- * Returns 1 if the entity has an enabled link to the output video node or 0
- * otherwise. It's true only while pipeline can have no more than one output
- * node.
- */
- static int iss_pipeline_is_last(struct media_entity *me)
- {
- struct iss_pipeline *pipe;
- struct media_pad *pad;
- if (!me->pipe)
- return 0;
- pipe = to_iss_pipeline(me);
- if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED)
- return 0;
- pad = media_entity_remote_pad(&pipe->output->pad);
- return pad->entity == me;
- }
- static int iss_reset(struct iss_device *iss)
- {
- unsigned int timeout;
- iss_reg_set(iss, OMAP4_ISS_MEM_TOP, ISS_HL_SYSCONFIG,
- ISS_HL_SYSCONFIG_SOFTRESET);
- timeout = iss_poll_condition_timeout(
- !(iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_SYSCONFIG) &
- ISS_HL_SYSCONFIG_SOFTRESET), 1000, 10, 100);
- if (timeout) {
- dev_err(iss->dev, "ISS reset timeout\n");
- return -ETIMEDOUT;
- }
- iss->crashed = 0;
- return 0;
- }
- static int iss_isp_reset(struct iss_device *iss)
- {
- unsigned int timeout;
- /* Fist, ensure that the ISP is IDLE (no transactions happening) */
- iss_reg_update(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG,
- ISP5_SYSCONFIG_STANDBYMODE_MASK,
- ISP5_SYSCONFIG_STANDBYMODE_SMART);
- iss_reg_set(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, ISP5_CTRL_MSTANDBY);
- timeout = iss_poll_condition_timeout(
- iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL) &
- ISP5_CTRL_MSTANDBY_WAIT, 1000000, 1000, 1500);
- if (timeout) {
- dev_err(iss->dev, "ISP5 standby timeout\n");
- return -ETIMEDOUT;
- }
- /* Now finally, do the reset */
- iss_reg_set(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG,
- ISP5_SYSCONFIG_SOFTRESET);
- timeout = iss_poll_condition_timeout(
- !(iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG) &
- ISP5_SYSCONFIG_SOFTRESET), 1000000, 1000, 1500);
- if (timeout) {
- dev_err(iss->dev, "ISP5 reset timeout\n");
- return -ETIMEDOUT;
- }
- return 0;
- }
- /*
- * iss_module_sync_idle - Helper to sync module with its idle state
- * @me: ISS submodule's media entity
- * @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
- * @stopping: flag which tells module wants to stop
- *
- * This function checks if ISS submodule needs to wait for next interrupt. If
- * yes, makes the caller to sleep while waiting for such event.
- */
- int omap4iss_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
- atomic_t *stopping)
- {
- struct iss_pipeline *pipe = to_iss_pipeline(me);
- struct iss_video *video = pipe->output;
- unsigned long flags;
- if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED ||
- (pipe->stream_state == ISS_PIPELINE_STREAM_SINGLESHOT &&
- !iss_pipeline_ready(pipe)))
- return 0;
- /*
- * atomic_set() doesn't include memory barrier on ARM platform for SMP
- * scenario. We'll call it here to avoid race conditions.
- */
- atomic_set(stopping, 1);
- smp_wmb();
- /*
- * If module is the last one, it's writing to memory. In this case,
- * it's necessary to check if the module is already paused due to
- * DMA queue underrun or if it has to wait for next interrupt to be
- * idle.
- * If it isn't the last one, the function won't sleep but *stopping
- * will still be set to warn next submodule caller's interrupt the
- * module wants to be idle.
- */
- if (!iss_pipeline_is_last(me))
- return 0;
- spin_lock_irqsave(&video->qlock, flags);
- if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
- spin_unlock_irqrestore(&video->qlock, flags);
- atomic_set(stopping, 0);
- smp_wmb();
- return 0;
- }
- spin_unlock_irqrestore(&video->qlock, flags);
- if (!wait_event_timeout(*wait, !atomic_read(stopping),
- msecs_to_jiffies(1000))) {
- atomic_set(stopping, 0);
- smp_wmb();
- return -ETIMEDOUT;
- }
- return 0;
- }
- /*
- * omap4iss_module_sync_is_stopped - Helper to verify if module was stopping
- * @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
- * @stopping: flag which tells module wants to stop
- *
- * This function checks if ISS submodule was stopping. In case of yes, it
- * notices the caller by setting stopping to 0 and waking up the wait queue.
- * Returns 1 if it was stopping or 0 otherwise.
- */
- int omap4iss_module_sync_is_stopping(wait_queue_head_t *wait,
- atomic_t *stopping)
- {
- if (atomic_cmpxchg(stopping, 1, 0)) {
- wake_up(wait);
- return 1;
- }
- return 0;
- }
- /* --------------------------------------------------------------------------
- * Clock management
- */
- #define ISS_CLKCTRL_MASK (ISS_CLKCTRL_CSI2_A |\
- ISS_CLKCTRL_CSI2_B |\
- ISS_CLKCTRL_ISP)
- static int __iss_subclk_update(struct iss_device *iss)
- {
- u32 clk = 0;
- int ret = 0, timeout = 1000;
- if (iss->subclk_resources & OMAP4_ISS_SUBCLK_CSI2_A)
- clk |= ISS_CLKCTRL_CSI2_A;
- if (iss->subclk_resources & OMAP4_ISS_SUBCLK_CSI2_B)
- clk |= ISS_CLKCTRL_CSI2_B;
- if (iss->subclk_resources & OMAP4_ISS_SUBCLK_ISP)
- clk |= ISS_CLKCTRL_ISP;
- iss_reg_update(iss, OMAP4_ISS_MEM_TOP, ISS_CLKCTRL,
- ISS_CLKCTRL_MASK, clk);
- /* Wait for HW assertion */
- while (--timeout > 0) {
- udelay(1);
- if ((iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CLKSTAT) &
- ISS_CLKCTRL_MASK) == clk)
- break;
- }
- if (!timeout)
- ret = -EBUSY;
- return ret;
- }
- int omap4iss_subclk_enable(struct iss_device *iss,
- enum iss_subclk_resource res)
- {
- iss->subclk_resources |= res;
- return __iss_subclk_update(iss);
- }
- int omap4iss_subclk_disable(struct iss_device *iss,
- enum iss_subclk_resource res)
- {
- iss->subclk_resources &= ~res;
- return __iss_subclk_update(iss);
- }
- #define ISS_ISP5_CLKCTRL_MASK (ISP5_CTRL_BL_CLK_ENABLE |\
- ISP5_CTRL_ISIF_CLK_ENABLE |\
- ISP5_CTRL_H3A_CLK_ENABLE |\
- ISP5_CTRL_RSZ_CLK_ENABLE |\
- ISP5_CTRL_IPIPE_CLK_ENABLE |\
- ISP5_CTRL_IPIPEIF_CLK_ENABLE)
- static void __iss_isp_subclk_update(struct iss_device *iss)
- {
- u32 clk = 0;
- if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_ISIF)
- clk |= ISP5_CTRL_ISIF_CLK_ENABLE;
- if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_H3A)
- clk |= ISP5_CTRL_H3A_CLK_ENABLE;
- if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_RSZ)
- clk |= ISP5_CTRL_RSZ_CLK_ENABLE;
- if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_IPIPE)
- clk |= ISP5_CTRL_IPIPE_CLK_ENABLE;
- if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_IPIPEIF)
- clk |= ISP5_CTRL_IPIPEIF_CLK_ENABLE;
- if (clk)
- clk |= ISP5_CTRL_BL_CLK_ENABLE;
- iss_reg_update(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL,
- ISS_ISP5_CLKCTRL_MASK, clk);
- }
- void omap4iss_isp_subclk_enable(struct iss_device *iss,
- enum iss_isp_subclk_resource res)
- {
- iss->isp_subclk_resources |= res;
- __iss_isp_subclk_update(iss);
- }
- void omap4iss_isp_subclk_disable(struct iss_device *iss,
- enum iss_isp_subclk_resource res)
- {
- iss->isp_subclk_resources &= ~res;
- __iss_isp_subclk_update(iss);
- }
- /*
- * iss_enable_clocks - Enable ISS clocks
- * @iss: OMAP4 ISS device
- *
- * Return 0 if successful, or clk_enable return value if any of tthem fails.
- */
- static int iss_enable_clocks(struct iss_device *iss)
- {
- int ret;
- ret = clk_enable(iss->iss_fck);
- if (ret) {
- dev_err(iss->dev, "clk_enable iss_fck failed\n");
- return ret;
- }
- ret = clk_enable(iss->iss_ctrlclk);
- if (ret) {
- dev_err(iss->dev, "clk_enable iss_ctrlclk failed\n");
- clk_disable(iss->iss_fck);
- return ret;
- }
- return 0;
- }
- /*
- * iss_disable_clocks - Disable ISS clocks
- * @iss: OMAP4 ISS device
- */
- static void iss_disable_clocks(struct iss_device *iss)
- {
- clk_disable(iss->iss_ctrlclk);
- clk_disable(iss->iss_fck);
- }
- static int iss_get_clocks(struct iss_device *iss)
- {
- iss->iss_fck = devm_clk_get(iss->dev, "iss_fck");
- if (IS_ERR(iss->iss_fck)) {
- dev_err(iss->dev, "Unable to get iss_fck clock info\n");
- return PTR_ERR(iss->iss_fck);
- }
- iss->iss_ctrlclk = devm_clk_get(iss->dev, "iss_ctrlclk");
- if (IS_ERR(iss->iss_ctrlclk)) {
- dev_err(iss->dev, "Unable to get iss_ctrlclk clock info\n");
- return PTR_ERR(iss->iss_ctrlclk);
- }
- return 0;
- }
- /*
- * omap4iss_get - Acquire the ISS resource.
- *
- * Initializes the clocks for the first acquire.
- *
- * Increment the reference count on the ISS. If the first reference is taken,
- * enable clocks and power-up all submodules.
- *
- * Return a pointer to the ISS device structure, or NULL if an error occurred.
- */
- struct iss_device *omap4iss_get(struct iss_device *iss)
- {
- struct iss_device *__iss = iss;
- if (!iss)
- return NULL;
- mutex_lock(&iss->iss_mutex);
- if (iss->ref_count > 0)
- goto out;
- if (iss_enable_clocks(iss) < 0) {
- __iss = NULL;
- goto out;
- }
- iss_enable_interrupts(iss);
- out:
- if (__iss)
- iss->ref_count++;
- mutex_unlock(&iss->iss_mutex);
- return __iss;
- }
- /*
- * omap4iss_put - Release the ISS
- *
- * Decrement the reference count on the ISS. If the last reference is released,
- * power-down all submodules, disable clocks and free temporary buffers.
- */
- void omap4iss_put(struct iss_device *iss)
- {
- if (!iss)
- return;
- mutex_lock(&iss->iss_mutex);
- BUG_ON(iss->ref_count == 0);
- if (--iss->ref_count == 0) {
- iss_disable_interrupts(iss);
- /* Reset the ISS if an entity has failed to stop. This is the
- * only way to recover from such conditions, although it would
- * be worth investigating whether resetting the ISP only can't
- * fix the problem in some cases.
- */
- if (iss->crashed)
- iss_reset(iss);
- iss_disable_clocks(iss);
- }
- mutex_unlock(&iss->iss_mutex);
- }
- static int iss_map_mem_resource(struct platform_device *pdev,
- struct iss_device *iss,
- enum iss_mem_resources res)
- {
- struct resource *mem;
- mem = platform_get_resource(pdev, IORESOURCE_MEM, res);
- iss->regs[res] = devm_ioremap_resource(iss->dev, mem);
- return PTR_ERR_OR_ZERO(iss->regs[res]);
- }
- static void iss_unregister_entities(struct iss_device *iss)
- {
- omap4iss_resizer_unregister_entities(&iss->resizer);
- omap4iss_ipipe_unregister_entities(&iss->ipipe);
- omap4iss_ipipeif_unregister_entities(&iss->ipipeif);
- omap4iss_csi2_unregister_entities(&iss->csi2a);
- omap4iss_csi2_unregister_entities(&iss->csi2b);
- v4l2_device_unregister(&iss->v4l2_dev);
- media_device_unregister(&iss->media_dev);
- }
- /*
- * iss_register_subdev_group - Register a group of subdevices
- * @iss: OMAP4 ISS device
- * @board_info: I2C subdevs board information array
- *
- * Register all I2C subdevices in the board_info array. The array must be
- * terminated by a NULL entry, and the first entry must be the sensor.
- *
- * Return a pointer to the sensor media entity if it has been successfully
- * registered, or NULL otherwise.
- */
- static struct v4l2_subdev *
- iss_register_subdev_group(struct iss_device *iss,
- struct iss_subdev_i2c_board_info *board_info)
- {
- struct v4l2_subdev *sensor = NULL;
- unsigned int first;
- if (!board_info->board_info)
- return NULL;
- for (first = 1; board_info->board_info; ++board_info, first = 0) {
- struct v4l2_subdev *subdev;
- struct i2c_adapter *adapter;
- adapter = i2c_get_adapter(board_info->i2c_adapter_id);
- if (!adapter) {
- dev_err(iss->dev,
- "%s: Unable to get I2C adapter %d for device %s\n",
- __func__, board_info->i2c_adapter_id,
- board_info->board_info->type);
- continue;
- }
- subdev = v4l2_i2c_new_subdev_board(&iss->v4l2_dev, adapter,
- board_info->board_info, NULL);
- if (!subdev) {
- dev_err(iss->dev, "Unable to register subdev %s\n",
- board_info->board_info->type);
- continue;
- }
- if (first)
- sensor = subdev;
- }
- return sensor;
- }
- static int iss_register_entities(struct iss_device *iss)
- {
- struct iss_platform_data *pdata = iss->pdata;
- struct iss_v4l2_subdevs_group *subdevs;
- int ret;
- iss->media_dev.dev = iss->dev;
- strlcpy(iss->media_dev.model, "TI OMAP4 ISS",
- sizeof(iss->media_dev.model));
- iss->media_dev.hw_revision = iss->revision;
- iss->media_dev.link_notify = iss_pipeline_link_notify;
- ret = media_device_register(&iss->media_dev);
- if (ret < 0) {
- dev_err(iss->dev, "Media device registration failed (%d)\n",
- ret);
- return ret;
- }
- iss->v4l2_dev.mdev = &iss->media_dev;
- ret = v4l2_device_register(iss->dev, &iss->v4l2_dev);
- if (ret < 0) {
- dev_err(iss->dev, "V4L2 device registration failed (%d)\n",
- ret);
- goto done;
- }
- /* Register internal entities */
- ret = omap4iss_csi2_register_entities(&iss->csi2a, &iss->v4l2_dev);
- if (ret < 0)
- goto done;
- ret = omap4iss_csi2_register_entities(&iss->csi2b, &iss->v4l2_dev);
- if (ret < 0)
- goto done;
- ret = omap4iss_ipipeif_register_entities(&iss->ipipeif, &iss->v4l2_dev);
- if (ret < 0)
- goto done;
- ret = omap4iss_ipipe_register_entities(&iss->ipipe, &iss->v4l2_dev);
- if (ret < 0)
- goto done;
- ret = omap4iss_resizer_register_entities(&iss->resizer, &iss->v4l2_dev);
- if (ret < 0)
- goto done;
- /* Register external entities */
- for (subdevs = pdata->subdevs; subdevs && subdevs->subdevs; ++subdevs) {
- struct v4l2_subdev *sensor;
- struct media_entity *input;
- unsigned int flags;
- unsigned int pad;
- sensor = iss_register_subdev_group(iss, subdevs->subdevs);
- if (!sensor)
- continue;
- sensor->host_priv = subdevs;
- /* Connect the sensor to the correct interface module.
- * CSI2a receiver through CSIPHY1, or
- * CSI2b receiver through CSIPHY2
- */
- switch (subdevs->interface) {
- case ISS_INTERFACE_CSI2A_PHY1:
- input = &iss->csi2a.subdev.entity;
- pad = CSI2_PAD_SINK;
- flags = MEDIA_LNK_FL_IMMUTABLE
- | MEDIA_LNK_FL_ENABLED;
- break;
- case ISS_INTERFACE_CSI2B_PHY2:
- input = &iss->csi2b.subdev.entity;
- pad = CSI2_PAD_SINK;
- flags = MEDIA_LNK_FL_IMMUTABLE
- | MEDIA_LNK_FL_ENABLED;
- break;
- default:
- dev_err(iss->dev, "invalid interface type %u\n",
- subdevs->interface);
- ret = -EINVAL;
- goto done;
- }
- ret = media_entity_create_link(&sensor->entity, 0, input, pad,
- flags);
- if (ret < 0)
- goto done;
- }
- ret = v4l2_device_register_subdev_nodes(&iss->v4l2_dev);
- done:
- if (ret < 0)
- iss_unregister_entities(iss);
- return ret;
- }
- static void iss_cleanup_modules(struct iss_device *iss)
- {
- omap4iss_csi2_cleanup(iss);
- omap4iss_ipipeif_cleanup(iss);
- omap4iss_ipipe_cleanup(iss);
- omap4iss_resizer_cleanup(iss);
- }
- static int iss_initialize_modules(struct iss_device *iss)
- {
- int ret;
- ret = omap4iss_csiphy_init(iss);
- if (ret < 0) {
- dev_err(iss->dev, "CSI PHY initialization failed\n");
- goto error_csiphy;
- }
- ret = omap4iss_csi2_init(iss);
- if (ret < 0) {
- dev_err(iss->dev, "CSI2 initialization failed\n");
- goto error_csi2;
- }
- ret = omap4iss_ipipeif_init(iss);
- if (ret < 0) {
- dev_err(iss->dev, "ISP IPIPEIF initialization failed\n");
- goto error_ipipeif;
- }
- ret = omap4iss_ipipe_init(iss);
- if (ret < 0) {
- dev_err(iss->dev, "ISP IPIPE initialization failed\n");
- goto error_ipipe;
- }
- ret = omap4iss_resizer_init(iss);
- if (ret < 0) {
- dev_err(iss->dev, "ISP RESIZER initialization failed\n");
- goto error_resizer;
- }
- /* Connect the submodules. */
- ret = media_entity_create_link(
- &iss->csi2a.subdev.entity, CSI2_PAD_SOURCE,
- &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
- if (ret < 0)
- goto error_link;
- ret = media_entity_create_link(
- &iss->csi2b.subdev.entity, CSI2_PAD_SOURCE,
- &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
- if (ret < 0)
- goto error_link;
- ret = media_entity_create_link(
- &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
- &iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
- if (ret < 0)
- goto error_link;
- ret = media_entity_create_link(
- &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
- &iss->ipipe.subdev.entity, IPIPE_PAD_SINK, 0);
- if (ret < 0)
- goto error_link;
- ret = media_entity_create_link(
- &iss->ipipe.subdev.entity, IPIPE_PAD_SOURCE_VP,
- &iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
- if (ret < 0)
- goto error_link;
- return 0;
- error_link:
- omap4iss_resizer_cleanup(iss);
- error_resizer:
- omap4iss_ipipe_cleanup(iss);
- error_ipipe:
- omap4iss_ipipeif_cleanup(iss);
- error_ipipeif:
- omap4iss_csi2_cleanup(iss);
- error_csi2:
- error_csiphy:
- return ret;
- }
- static int iss_probe(struct platform_device *pdev)
- {
- struct iss_platform_data *pdata = pdev->dev.platform_data;
- struct iss_device *iss;
- unsigned int i;
- int ret;
- if (!pdata)
- return -EINVAL;
- iss = devm_kzalloc(&pdev->dev, sizeof(*iss), GFP_KERNEL);
- if (!iss)
- return -ENOMEM;
- mutex_init(&iss->iss_mutex);
- iss->dev = &pdev->dev;
- iss->pdata = pdata;
- iss->raw_dmamask = DMA_BIT_MASK(32);
- iss->dev->dma_mask = &iss->raw_dmamask;
- iss->dev->coherent_dma_mask = DMA_BIT_MASK(32);
- platform_set_drvdata(pdev, iss);
- /*
- * TODO: When implementing DT support switch to syscon regmap lookup by
- * phandle.
- */
- iss->syscon = syscon_regmap_lookup_by_compatible("syscon");
- if (IS_ERR(iss->syscon)) {
- ret = PTR_ERR(iss->syscon);
- goto error;
- }
- /* Clocks */
- ret = iss_map_mem_resource(pdev, iss, OMAP4_ISS_MEM_TOP);
- if (ret < 0)
- goto error;
- ret = iss_get_clocks(iss);
- if (ret < 0)
- goto error;
- if (!omap4iss_get(iss))
- goto error;
- ret = iss_reset(iss);
- if (ret < 0)
- goto error_iss;
- iss->revision = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
- dev_info(iss->dev, "Revision %08x found\n", iss->revision);
- for (i = 1; i < OMAP4_ISS_MEM_LAST; i++) {
- ret = iss_map_mem_resource(pdev, iss, i);
- if (ret)
- goto error_iss;
- }
- /* Configure BTE BW_LIMITER field to max recommended value (1 GB) */
- iss_reg_update(iss, OMAP4_ISS_MEM_BTE, BTE_CTRL,
- BTE_CTRL_BW_LIMITER_MASK,
- 18 << BTE_CTRL_BW_LIMITER_SHIFT);
- /* Perform ISP reset */
- ret = omap4iss_subclk_enable(iss, OMAP4_ISS_SUBCLK_ISP);
- if (ret < 0)
- goto error_iss;
- ret = iss_isp_reset(iss);
- if (ret < 0)
- goto error_iss;
- dev_info(iss->dev, "ISP Revision %08x found\n",
- iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_REVISION));
- /* Interrupt */
- ret = platform_get_irq(pdev, 0);
- if (ret <= 0) {
- dev_err(iss->dev, "No IRQ resource\n");
- ret = -ENODEV;
- goto error_iss;
- }
- iss->irq_num = ret;
- if (devm_request_irq(iss->dev, iss->irq_num, iss_isr, IRQF_SHARED,
- "OMAP4 ISS", iss)) {
- dev_err(iss->dev, "Unable to request IRQ\n");
- ret = -EINVAL;
- goto error_iss;
- }
- /* Entities */
- ret = iss_initialize_modules(iss);
- if (ret < 0)
- goto error_iss;
- ret = iss_register_entities(iss);
- if (ret < 0)
- goto error_modules;
- omap4iss_put(iss);
- return 0;
- error_modules:
- iss_cleanup_modules(iss);
- error_iss:
- omap4iss_put(iss);
- error:
- platform_set_drvdata(pdev, NULL);
- mutex_destroy(&iss->iss_mutex);
- return ret;
- }
- static int iss_remove(struct platform_device *pdev)
- {
- struct iss_device *iss = platform_get_drvdata(pdev);
- iss_unregister_entities(iss);
- iss_cleanup_modules(iss);
- return 0;
- }
- static const struct platform_device_id omap4iss_id_table[] = {
- { "omap4iss", 0 },
- { },
- };
- MODULE_DEVICE_TABLE(platform, omap4iss_id_table);
- static struct platform_driver iss_driver = {
- .probe = iss_probe,
- .remove = iss_remove,
- .id_table = omap4iss_id_table,
- .driver = {
- .name = "omap4iss",
- },
- };
- module_platform_driver(iss_driver);
- MODULE_DESCRIPTION("TI OMAP4 ISS driver");
- MODULE_AUTHOR("Sergio Aguirre <sergio.a.aguirre@gmail.com>");
- MODULE_LICENSE("GPL");
- MODULE_VERSION(ISS_VIDEO_DRIVER_VERSION);
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