// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Driver for the Conexant CX23885/7/8 PCIe bridge
 *
 *  Various common ioctl() support functions
 *
 *  Copyright (c) 2009 Andy Walls <awalls@md.metrocast.net>
 */

#include "cx23885.h"
#include "cx23885-ioctl.h"

#ifdef CONFIG_VIDEO_ADV_DEBUG
int cx23885_g_chip_info(struct file *file, void *fh,
                         struct v4l2_dbg_chip_info *chip)
{
        struct cx23885_dev *dev = video_drvdata(file);

        if (chip->match.addr > 1)
                return -EINVAL;
        if (chip->match.addr == 1) {
                if (dev->v4l_device == NULL)
                        return -EINVAL;
                strscpy(chip->name, "cx23417", sizeof(chip->name));
        } else {
                strscpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name));
        }
        return 0;
}

static int cx23417_g_register(struct cx23885_dev *dev,
                              struct v4l2_dbg_register *reg)
{
        u32 value;

        if (dev->v4l_device == NULL)
                return -EINVAL;

        if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
                return -EINVAL;

        if (mc417_register_read(dev, (u16) reg->reg, &value))
                return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */

        reg->size = 4;
        reg->val = value;
        return 0;
}

int cx23885_g_register(struct file *file, void *fh,
                       struct v4l2_dbg_register *reg)
{
        struct cx23885_dev *dev = video_drvdata(file);

        if (reg->match.addr > 1)
                return -EINVAL;
        if (reg->match.addr)
                return cx23417_g_register(dev, reg);

        if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
                return -EINVAL;

        reg->size = 4;
        reg->val = cx_read(reg->reg);
        return 0;
}

static int cx23417_s_register(struct cx23885_dev *dev,
                              const struct v4l2_dbg_register *reg)
{
        if (dev->v4l_device == NULL)
                return -EINVAL;

        if ((reg->reg & 0x3) != 0 || reg->reg >= 0x10000)
                return -EINVAL;

        if (mc417_register_write(dev, (u16) reg->reg, (u32) reg->val))
                return -EINVAL; /* V4L2 spec, but -EREMOTEIO really */
        return 0;
}

int cx23885_s_register(struct file *file, void *fh,
                       const struct v4l2_dbg_register *reg)
{
        struct cx23885_dev *dev = video_drvdata(file);

        if (reg->match.addr > 1)
                return -EINVAL;
        if (reg->match.addr)
                return cx23417_s_register(dev, reg);

        if ((reg->reg & 0x3) != 0 || reg->reg >= pci_resource_len(dev->pci, 0))
                return -EINVAL;

        cx_write(reg->reg, reg->val);
        return 0;
}
#endif