/*
 * 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.
 */

#ifndef _OMAP4_ISS_H_
#define _OMAP4_ISS_H_

#include <media/v4l2-device.h>
#include <media/v4l2-mc.h>

#include <linux/device.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/wait.h>

#include <linux/platform_data/media/omap4iss.h>

#include "iss_regs.h"
#include "iss_csiphy.h"
#include "iss_csi2.h"
#include "iss_ipipeif.h"
#include "iss_ipipe.h"
#include "iss_resizer.h"

struct regmap;

#define to_iss_device(ptr_module)                               \
        container_of(ptr_module, struct iss_device, ptr_module)
#define to_device(ptr_module)                                           \
        (to_iss_device(ptr_module)->dev)

enum iss_mem_resources {
        OMAP4_ISS_MEM_TOP,
        OMAP4_ISS_MEM_CSI2_A_REGS1,
        OMAP4_ISS_MEM_CAMERARX_CORE1,
        OMAP4_ISS_MEM_CSI2_B_REGS1,
        OMAP4_ISS_MEM_CAMERARX_CORE2,
        OMAP4_ISS_MEM_BTE,
        OMAP4_ISS_MEM_ISP_SYS1,
        OMAP4_ISS_MEM_ISP_RESIZER,
        OMAP4_ISS_MEM_ISP_IPIPE,
        OMAP4_ISS_MEM_ISP_ISIF,
        OMAP4_ISS_MEM_ISP_IPIPEIF,
        OMAP4_ISS_MEM_LAST,
};

enum iss_subclk_resource {
        OMAP4_ISS_SUBCLK_SIMCOP         = (1 << 0),
        OMAP4_ISS_SUBCLK_ISP            = (1 << 1),
        OMAP4_ISS_SUBCLK_CSI2_A         = (1 << 2),
        OMAP4_ISS_SUBCLK_CSI2_B         = (1 << 3),
        OMAP4_ISS_SUBCLK_CCP2           = (1 << 4),
};

enum iss_isp_subclk_resource {
        OMAP4_ISS_ISP_SUBCLK_BL         = (1 << 0),
        OMAP4_ISS_ISP_SUBCLK_ISIF       = (1 << 1),
        OMAP4_ISS_ISP_SUBCLK_H3A        = (1 << 2),
        OMAP4_ISS_ISP_SUBCLK_RSZ        = (1 << 3),
        OMAP4_ISS_ISP_SUBCLK_IPIPE      = (1 << 4),
        OMAP4_ISS_ISP_SUBCLK_IPIPEIF    = (1 << 5),
};

/*
 * struct iss_reg - Structure for ISS register values.
 * @reg: 32-bit Register address.
 * @val: 32-bit Register value.
 */
struct iss_reg {
        enum iss_mem_resources mmio_range;
        u32 reg;
        u32 val;
};

/*
 * struct iss_device - ISS device structure.
 * @syscon: Regmap for the syscon register space
 * @crashed: Crashed entities
 */
struct iss_device {
        struct v4l2_device v4l2_dev;
        struct media_device media_dev;
        struct device *dev;
        u32 revision;

        /* platform HW resources */
        struct iss_platform_data *pdata;
        unsigned int irq_num;

        struct resource *res[OMAP4_ISS_MEM_LAST];
        void __iomem *regs[OMAP4_ISS_MEM_LAST];
        struct regmap *syscon;

        u64 raw_dmamask;

        struct mutex iss_mutex; /* For handling ref_count field */
        struct media_entity_enum crashed;
        int has_context;
        int ref_count;

        struct clk *iss_fck;
        struct clk *iss_ctrlclk;

        /* ISS modules */
        struct iss_csi2_device csi2a;
        struct iss_csi2_device csi2b;
        struct iss_csiphy csiphy1;
        struct iss_csiphy csiphy2;
        struct iss_ipipeif_device ipipeif;
        struct iss_ipipe_device ipipe;
        struct iss_resizer_device resizer;

        unsigned int subclk_resources;
        unsigned int isp_subclk_resources;
};

#define v4l2_dev_to_iss_device(dev) \
        container_of(dev, struct iss_device, v4l2_dev)

int omap4iss_get_external_info(struct iss_pipeline *pipe,
                               struct media_link *link);

int omap4iss_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
                              atomic_t *stopping);

int omap4iss_module_sync_is_stopping(wait_queue_head_t *wait,
                                     atomic_t *stopping);

int omap4iss_pipeline_set_stream(struct iss_pipeline *pipe,
                                 enum iss_pipeline_stream_state state);
void omap4iss_pipeline_cancel_stream(struct iss_pipeline *pipe);

void omap4iss_configure_bridge(struct iss_device *iss,
                               enum ipipeif_input_entity input);

struct iss_device *omap4iss_get(struct iss_device *iss);
void omap4iss_put(struct iss_device *iss);
int omap4iss_subclk_enable(struct iss_device *iss,
                           enum iss_subclk_resource res);
int omap4iss_subclk_disable(struct iss_device *iss,
                            enum iss_subclk_resource res);
void omap4iss_isp_subclk_enable(struct iss_device *iss,
                                enum iss_isp_subclk_resource res);
void omap4iss_isp_subclk_disable(struct iss_device *iss,
                                 enum iss_isp_subclk_resource res);

int omap4iss_register_entities(struct platform_device *pdev,
                               struct v4l2_device *v4l2_dev);
void omap4iss_unregister_entities(struct platform_device *pdev);

/*
 * iss_reg_read - Read the value of an OMAP4 ISS register
 * @iss: the ISS device
 * @res: memory resource in which the register is located
 * @offset: register offset in the memory resource
 *
 * Return the register value.
 */
static inline
u32 iss_reg_read(struct iss_device *iss, enum iss_mem_resources res,
                 u32 offset)
{
        return readl(iss->regs[res] + offset);
}

/*
 * iss_reg_write - Write a value to an OMAP4 ISS register
 * @iss: the ISS device
 * @res: memory resource in which the register is located
 * @offset: register offset in the memory resource
 * @value: value to be written
 */
static inline
void iss_reg_write(struct iss_device *iss, enum iss_mem_resources res,
                   u32 offset, u32 value)
{
        writel(value, iss->regs[res] + offset);
}

/*
 * iss_reg_clr - Clear bits in an OMAP4 ISS register
 * @iss: the ISS device
 * @res: memory resource in which the register is located
 * @offset: register offset in the memory resource
 * @clr: bit mask to be cleared
 */
static inline
void iss_reg_clr(struct iss_device *iss, enum iss_mem_resources res,
                 u32 offset, u32 clr)
{
        u32 v = iss_reg_read(iss, res, offset);

        iss_reg_write(iss, res, offset, v & ~clr);
}

/*
 * iss_reg_set - Set bits in an OMAP4 ISS register
 * @iss: the ISS device
 * @res: memory resource in which the register is located
 * @offset: register offset in the memory resource
 * @set: bit mask to be set
 */
static inline
void iss_reg_set(struct iss_device *iss, enum iss_mem_resources res,
                 u32 offset, u32 set)
{
        u32 v = iss_reg_read(iss, res, offset);

        iss_reg_write(iss, res, offset, v | set);
}

/*
 * iss_reg_update - Clear and set bits in an OMAP4 ISS register
 * @iss: the ISS device
 * @res: memory resource in which the register is located
 * @offset: register offset in the memory resource
 * @clr: bit mask to be cleared
 * @set: bit mask to be set
 *
 * Clear the clr mask first and then set the set mask.
 */
static inline
void iss_reg_update(struct iss_device *iss, enum iss_mem_resources res,
                    u32 offset, u32 clr, u32 set)
{
        u32 v = iss_reg_read(iss, res, offset);

        iss_reg_write(iss, res, offset, (v & ~clr) | set);
}

#define iss_poll_condition_timeout(cond, timeout, min_ival, max_ival)   \
({                                                                      \
        unsigned long __timeout = jiffies + usecs_to_jiffies(timeout);  \
        unsigned int __min_ival = (min_ival);                           \
        unsigned int __max_ival = (max_ival);                           \
        bool __cond;                                                    \
        while (!(__cond = (cond))) {                                    \
                if (time_after(jiffies, __timeout))                     \
                        break;                                          \
                usleep_range(__min_ival, __max_ival);                   \
        }                                                               \
        !__cond;                                                        \
})

#endif /* _OMAP4_ISS_H_ */