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/*

 * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1

 *

 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>

 *

 * Based on adv7176 driver by:

 *

 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>

 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>

 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>

 *    - some corrections for Pinnacle Systems Inc. DC10plus card.

 *

 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>

 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <linux/module.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/errno.h>

#include <linux/fs.h>

#include <linux/kernel.h>

#include <linux/major.h>

#include <linux/slab.h>

#include <linux/mm.h>

#include <linux/signal.h>

#include <linux/types.h>

#include <linux/i2c.h>

#include <asm/io.h>

#include <asm/pgtable.h>

#include <asm/page.h>

#include <asm/uaccess.h>

#include <linux/videodev.h>

#include <linux/video_encoder.h>

MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");

MODULE_AUTHOR("Maxim Yevtyushkin");

MODULE_LICENSE("GPL");

#define I2C_NAME(x) (x)->name

static int debug = 0;

module_param(debug, int, 0);

MODULE_PARM_DESC(debug, "Debug level (0-1)");

#define dprintk(num, format, args...) \

        do { \

                if (debug >= num) \

                        printk(format, ##args); \

        } while (0)

/* ----------------------------------------------------------------------- */

struct adv7170 {

        unsigned char reg[128];

        int norm;

        int input;

        int enable;

        int bright;

        int contrast;

        int hue;

        int sat;

};

#define   I2C_ADV7170        0xd4

#define   I2C_ADV7171        0x54

static char adv7170_name[] = "adv7170";

static char adv7171_name[] = "adv7171";

static char *inputs[] = { "pass_through", "play_back" };

static char *norms[] = { "PAL", "NTSC" };

/* ----------------------------------------------------------------------- */

static inline int

adv7170_write (struct i2c_client *client,

               u8                 reg,

               u8                 value)

{

        struct adv7170 *encoder = i2c_get_clientdata(client);

        encoder->reg[reg] = value;

        return i2c_smbus_write_byte_data(client, reg, value);

}

static inline int

adv7170_read (struct i2c_client *client,

              u8                 reg)

{

        return i2c_smbus_read_byte_data(client, reg);

}

static int

adv7170_write_block (struct i2c_client *client,

                     const u8          *data,

                     unsigned int       len)

{

        int ret = -1;

        u8 reg;

        /* the adv7170 has an autoincrement function, use it if

         * the adapter understands raw I2C */

        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {

                /* do raw I2C, not smbus compatible */

                struct adv7170 *encoder = i2c_get_clientdata(client);

                u8 block_data[32];

                int block_len;

                while (len >= 2) {

                        block_len = 0;

                        block_data[block_len++] = reg = data[0];

                        do {

                                block_data[block_len++] =

                                    encoder->reg[reg++] = data[1];

                                len -= 2;

                                data += 2;

                        } while (len >= 2 && data[0] == reg &&

                                 block_len < 32);

                        if ((ret = i2c_master_send(client, block_data,

                                                   block_len)) < 0)

                                break;

                }

        } else {

                /* do some slow I2C emulation kind of thing */

                while (len >= 2) {

                        reg = *data++;

                        if ((ret = adv7170_write(client, reg,

                                                 *data++)) < 0)

                                break;

                        len -= 2;

                }

        }

        return ret;

}

/* ----------------------------------------------------------------------- */

// Output filter:  S-Video  Composite

#define MR050       0x11        //0x09

#define MR060       0x14        //0x0c

//---------------------------------------------------------------------------

#define TR0MODE     0x4c

#define TR0RST      0x80

#define TR1CAPT     0x00

#define TR1PLAY     0x00

static const unsigned char init_NTSC[] = {

        0x00, 0x10,             // MR0

        0x01, 0x20,             // MR1

        0x02, 0x0e,             // MR2 RTC control: bits 2 and 1

        0x03, 0x80,             // MR3

        0x04, 0x30,             // MR4

        0x05, 0x00,             // Reserved

        0x06, 0x00,             // Reserved

        0x07, TR0MODE,          // TM0

        0x08, TR1CAPT,          // TM1

        0x09, 0x16,             // Fsc0

        0x0a, 0x7c,             // Fsc1

        0x0b, 0xf0,             // Fsc2

        0x0c, 0x21,             // Fsc3

        0x0d, 0x00,             // Subcarrier Phase

        0x0e, 0x00,             // Closed Capt. Ext 0

        0x0f, 0x00,             // Closed Capt. Ext 1

        0x10, 0x00,             // Closed Capt. 0

        0x11, 0x00,             // Closed Capt. 1

        0x12, 0x00,             // Pedestal Ctl 0

        0x13, 0x00,             // Pedestal Ctl 1

        0x14, 0x00,             // Pedestal Ctl 2

        0x15, 0x00,             // Pedestal Ctl 3

        0x16, 0x00,             // CGMS_WSS_0

        0x17, 0x00,             // CGMS_WSS_1

        0x18, 0x00,             // CGMS_WSS_2

        0x19, 0x00,             // Teletext Ctl

};

static const unsigned char init_PAL[] = {

        0x00, 0x71,             // MR0

        0x01, 0x20,             // MR1

        0x02, 0x0e,             // MR2 RTC control: bits 2 and 1

        0x03, 0x80,             // MR3

        0x04, 0x30,             // MR4

        0x05, 0x00,             // Reserved

        0x06, 0x00,             // Reserved

        0x07, TR0MODE,          // TM0

        0x08, TR1CAPT,          // TM1

        0x09, 0xcb,             // Fsc0

        0x0a, 0x8a,             // Fsc1

        0x0b, 0x09,             // Fsc2

        0x0c, 0x2a,             // Fsc3

        0x0d, 0x00,             // Subcarrier Phase

        0x0e, 0x00,             // Closed Capt. Ext 0

        0x0f, 0x00,             // Closed Capt. Ext 1

        0x10, 0x00,             // Closed Capt. 0

        0x11, 0x00,             // Closed Capt. 1

        0x12, 0x00,             // Pedestal Ctl 0

        0x13, 0x00,             // Pedestal Ctl 1

        0x14, 0x00,             // Pedestal Ctl 2

        0x15, 0x00,             // Pedestal Ctl 3

        0x16, 0x00,             // CGMS_WSS_0

        0x17, 0x00,             // CGMS_WSS_1

        0x18, 0x00,             // CGMS_WSS_2

        0x19, 0x00,             // Teletext Ctl

};

static int

adv7170_command (struct i2c_client *client,

                 unsigned int       cmd,

                 void *             arg)

{

        struct adv7170 *encoder = i2c_get_clientdata(client);

        switch (cmd) {

        case 0:

#if 0

                /* This is just for testing!!! */

                adv7170_write_block(client, init_common,

                                    sizeof(init_common));

                adv7170_write(client, 0x07, TR0MODE | TR0RST);

                adv7170_write(client, 0x07, TR0MODE);

#endif

                break;

        case ENCODER_GET_CAPABILITIES:

        {

                struct video_encoder_capability *cap = arg;

                cap->flags = VIDEO_ENCODER_PAL |

                             VIDEO_ENCODER_NTSC;

                cap->inputs = 2;

                cap->outputs = 1;

        }

                break;

        case ENCODER_SET_NORM:

        {

                int iarg = *(int *) arg;

                dprintk(1, KERN_DEBUG "%s_command: set norm %d",

                        I2C_NAME(client), iarg);

                switch (iarg) {

                case VIDEO_MODE_NTSC:

                        adv7170_write_block(client, init_NTSC,

                                            sizeof(init_NTSC));

                        if (encoder->input == 0)

                                adv7170_write(client, 0x02, 0x0e);      // Enable genlock

                        adv7170_write(client, 0x07, TR0MODE | TR0RST);

                        adv7170_write(client, 0x07, TR0MODE);

                        break;

                case VIDEO_MODE_PAL:

                        adv7170_write_block(client, init_PAL,

                                            sizeof(init_PAL));

                        if (encoder->input == 0)

                                adv7170_write(client, 0x02, 0x0e);      // Enable genlock

                        adv7170_write(client, 0x07, TR0MODE | TR0RST);

                        adv7170_write(client, 0x07, TR0MODE);

                        break;

                default:

                        dprintk(1, KERN_ERR "%s: illegal norm: %d\n",

                               I2C_NAME(client), iarg);

                        return -EINVAL;

                }

                dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),

                        norms[iarg]);

                encoder->norm = iarg;

        }

                break;

        case ENCODER_SET_INPUT:

        {

                int iarg = *(int *) arg;

                /* RJ: *iarg = 0: input is from decoder

                 *iarg = 1: input is from ZR36060

                 *iarg = 2: color bar */

                dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",

                        I2C_NAME(client),

                        iarg == 0 ? "decoder" : "ZR36060");

                switch (iarg) {

                case 0:

                        adv7170_write(client, 0x01, 0x20);

                        adv7170_write(client, 0x08, TR1CAPT);   /* TR1 */

                        adv7170_write(client, 0x02, 0x0e);      // Enable genlock

                        adv7170_write(client, 0x07, TR0MODE | TR0RST);

                        adv7170_write(client, 0x07, TR0MODE);

                        //udelay(10);

                        break;

                case 1:

                        adv7170_write(client, 0x01, 0x00);

                        adv7170_write(client, 0x08, TR1PLAY);   /* TR1 */

                        adv7170_write(client, 0x02, 0x08);

                        adv7170_write(client, 0x07, TR0MODE | TR0RST);

                        adv7170_write(client, 0x07, TR0MODE);

                        //udelay(10);

                        break;

                default:

                        dprintk(1, KERN_ERR "%s: illegal input: %d\n",

                                I2C_NAME(client), iarg);

                        return -EINVAL;

                }

                dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),

                        inputs[iarg]);

                encoder->input = iarg;

        }

                break;

        case ENCODER_SET_OUTPUT:

        {

                int *iarg = arg;

                /* not much choice of outputs */

                if (*iarg != 0) {

                        return -EINVAL;

                }

        }

                break;

        case ENCODER_ENABLE_OUTPUT:

        {

                int *iarg = arg;

                encoder->enable = !!*iarg;

        }

                break;

        default:

                return -EINVAL;

        }

        return 0;

}

/* ----------------------------------------------------------------------- */

/*

 * Generic i2c probe

 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'

 */

static unsigned short normal_i2c[] =

    { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,

        I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,

        I2C_CLIENT_END

};

static unsigned short ignore = I2C_CLIENT_END;

static struct i2c_client_address_data addr_data = {

        .normal_i2c             = normal_i2c,

        .probe                  = &ignore,

        .ignore                 = &ignore,

};

static struct i2c_driver i2c_driver_adv7170;

static int

adv7170_detect_client (struct i2c_adapter *adapter,

                       int                 address,

                       int                 kind)

{

        int i;

        struct i2c_client *client;

        struct adv7170 *encoder;

        char *dname;

        dprintk(1,

                KERN_INFO

                "adv7170.c: detecting adv7170 client on address 0x%x\n",

                address << 1);

        /* Check if the adapter supports the needed features */

        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))

                return 0;

        client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);

        if (client == 0)

                return -ENOMEM;

        client->addr = address;

        client->adapter = adapter;

        client->driver = &i2c_driver_adv7170;

        if ((client->addr == I2C_ADV7170 >> 1) ||

            (client->addr == (I2C_ADV7170 >> 1) + 1)) {

                dname = adv7170_name;

        } else if ((client->addr == I2C_ADV7171 >> 1) ||

                   (client->addr == (I2C_ADV7171 >> 1) + 1)) {

                dname = adv7171_name;

        } else {

                /* We should never get here!!! */

                kfree(client);

                return 0;

        }

        strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));

        encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);

        if (encoder == NULL) {

                kfree(client);

                return -ENOMEM;

        }

        encoder->norm = VIDEO_MODE_NTSC;

        encoder->input = 0;

        encoder->enable = 1;

        i2c_set_clientdata(client, encoder);

        i = i2c_attach_client(client);

        if (i) {

                kfree(client);

                kfree(encoder);

                return i;

        }

        i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));

        if (i >= 0) {

                i = adv7170_write(client, 0x07, TR0MODE | TR0RST);

                i = adv7170_write(client, 0x07, TR0MODE);

                i = adv7170_read(client, 0x12);

                dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",

                        I2C_NAME(client), i & 1, client->addr << 1);

        }

        if (i < 0) {

                dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",

                       I2C_NAME(client), i);

        }

        return 0;

}

static int

adv7170_attach_adapter (struct i2c_adapter *adapter)

{

        dprintk(1,

                KERN_INFO

                "adv7170.c: starting probe for adapter %s (0x%x)\n",

                I2C_NAME(adapter), adapter->id);

        return i2c_probe(adapter, &addr_data, &adv7170_detect_client);

}

static int

adv7170_detach_client (struct i2c_client *client)

{

        struct adv7170 *encoder = i2c_get_clientdata(client);

        int err;

        err = i2c_detach_client(client);

        if (err) {

                return err;

        }

        kfree(encoder);

        kfree(client);

        return 0;

}

/* ----------------------------------------------------------------------- */

static struct i2c_driver i2c_driver_adv7170 = {

        .driver = {

                .name = "adv7170",      /* name */

        },

        .id = I2C_DRIVERID_ADV7170,

        .attach_adapter = adv7170_attach_adapter,

        .detach_client = adv7170_detach_client,

        .command = adv7170_command,

};

static int __init

adv7170_init (void)

{

        return i2c_add_driver(&i2c_driver_adv7170);

}

static void __exit

adv7170_exit (void)

{

        i2c_del_driver(&i2c_driver_adv7170);

}

module_init(adv7170_init);

module_exit(adv7170_exit);