// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * handle saa7134 IR remotes via linux kernel input layer.
 */

#include "saa7134.h"
#include "saa7134-reg.h"

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/slab.h>

#define MODULE_NAME "saa7134"

static unsigned int disable_ir;
module_param(disable_ir, int, 0444);
MODULE_PARM_DESC(disable_ir,"disable infrared remote support");

static unsigned int ir_debug;
module_param(ir_debug, int, 0644);
MODULE_PARM_DESC(ir_debug,"enable debug messages [IR]");

static int pinnacle_remote;
module_param(pinnacle_remote, int, 0644);    /* Choose Pinnacle PCTV remote */
MODULE_PARM_DESC(pinnacle_remote, "Specify Pinnacle PCTV remote: 0=coloured, 1=grey (defaults to 0)");

#define input_dbg(fmt, arg...) do { \
        if (ir_debug) \
                printk(KERN_DEBUG pr_fmt("input: " fmt), ## arg); \
        } while (0)
#define ir_dbg(ir, fmt, arg...) do { \
        if (ir_debug) \
                printk(KERN_DEBUG pr_fmt("ir %s: " fmt), ir->rc->device_name, \
                       ## arg); \
        } while (0)

/* Helper function for raw decoding at GPIO16 or GPIO18 */
static int saa7134_raw_decode_irq(struct saa7134_dev *dev);

/* -------------------- GPIO generic keycode builder -------------------- */

static int build_key(struct saa7134_dev *dev)
{
        struct saa7134_card_ir *ir = dev->remote;
        u32 gpio, data;

        /* here comes the additional handshake steps for some cards */
        switch (dev->board) {
        case SAA7134_BOARD_GOTVIEW_7135:
                saa_setb(SAA7134_GPIO_GPSTATUS1, 0x80);
                saa_clearb(SAA7134_GPIO_GPSTATUS1, 0x80);
                break;
        }
        /* rising SAA7134_GPIO_GPRESCAN reads the status */
        saa_clearb(SAA7134_GPIO_GPMODE3,SAA7134_GPIO_GPRESCAN);
        saa_setb(SAA7134_GPIO_GPMODE3,SAA7134_GPIO_GPRESCAN);

        gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);
        if (ir->polling) {
                if (ir->last_gpio == gpio)
                        return 0;
                ir->last_gpio = gpio;
        }

        data = ir_extract_bits(gpio, ir->mask_keycode);
        input_dbg("build_key gpio=0x%x mask=0x%x data=%d\n",
                gpio, ir->mask_keycode, data);

        switch (dev->board) {
        case SAA7134_BOARD_KWORLD_PLUS_TV_ANALOG:
                if (data == ir->mask_keycode)
                        rc_keyup(ir->dev);
                else
                        rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
                                             0);
                return 0;
        }

        if (ir->polling) {
                if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
                    (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
                        rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
                                             0);
                } else {
                        rc_keyup(ir->dev);
                }
        }
        else {  /* IRQ driven mode - handle key press and release in one go */
                if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
                    (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
                        rc_keydown_notimeout(ir->dev, RC_PROTO_UNKNOWN, data,
                                             0);
                        rc_keyup(ir->dev);
                }
        }

        return 0;
}

/* --------------------- Chip specific I2C key builders ----------------- */

static int get_key_flydvb_trio(struct IR_i2c *ir, enum rc_proto *protocol,
                               u32 *scancode, u8 *toggle)
{
        int gpio, rc;
        int attempt = 0;
        unsigned char b;

        /* We need this to access GPI Used by the saa_readl macro. */
        struct saa7134_dev *dev = ir->c->adapter->algo_data;

        if (dev == NULL) {
                ir_dbg(ir, "get_key_flydvb_trio: ir->c->adapter->algo_data is NULL!\n");
                return -EIO;
        }

        /* rising SAA7134_GPIGPRESCAN reads the status */
        saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
        saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

        gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

        if (0x40000 & ~gpio)
                return 0; /* No button press */

        /* poll IR chip */
        /* weak up the IR chip */
        b = 0;

        while (1 != i2c_master_send(ir->c, &b, 1)) {
                if ((attempt++) < 10) {
                        /*
                         * wait a bit for next attempt -
                         * I don't know how make it better
                         */
                        msleep(10);
                        continue;
                }
                ir_dbg(ir, "send wake up byte to pic16C505 (IR chip)failed %dx\n",
                       attempt);
                return -EIO;
        }
        rc = i2c_master_recv(ir->c, &b, 1);
        if (rc != 1) {
                ir_dbg(ir, "read error\n");
                if (rc < 0)
                        return rc;
                return -EIO;
        }

        *protocol = RC_PROTO_UNKNOWN;
        *scancode = b;
        *toggle = 0;
        return 1;
}

static int get_key_msi_tvanywhere_plus(struct IR_i2c *ir,
                                       enum rc_proto *protocol,
                                       u32 *scancode, u8 *toggle)
{
        unsigned char b;
        int gpio, rc;

        /* <dev> is needed to access GPIO. Used by the saa_readl macro. */
        struct saa7134_dev *dev = ir->c->adapter->algo_data;
        if (dev == NULL) {
                ir_dbg(ir, "get_key_msi_tvanywhere_plus: ir->c->adapter->algo_data is NULL!\n");
                return -EIO;
        }

        /* rising SAA7134_GPIO_GPRESCAN reads the status */

        saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
        saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

        gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

        /* GPIO&0x40 is pulsed low when a button is pressed. Don't do
           I2C receive if gpio&0x40 is not low. */

        if (gpio & 0x40)
                return 0;       /* No button press */

        /* GPIO says there is a button press. Get it. */

        rc = i2c_master_recv(ir->c, &b, 1);
        if (rc != 1) {
                ir_dbg(ir, "read error\n");
                if (rc < 0)
                        return rc;
                return -EIO;
        }

        /* No button press */

        if (b == 0xff)
                return 0;

        /* Button pressed */

        input_dbg("get_key_msi_tvanywhere_plus: Key = 0x%02X\n", b);
        *protocol = RC_PROTO_UNKNOWN;
        *scancode = b;
        *toggle = 0;
        return 1;
}

/* copied and modified from get_key_msi_tvanywhere_plus() */
static int get_key_kworld_pc150u(struct IR_i2c *ir, enum rc_proto *protocol,
                                 u32 *scancode, u8 *toggle)
{
        unsigned char b;
        unsigned int gpio;
        int rc;

        /* <dev> is needed to access GPIO. Used by the saa_readl macro. */
        struct saa7134_dev *dev = ir->c->adapter->algo_data;
        if (dev == NULL) {
                ir_dbg(ir, "get_key_kworld_pc150u: ir->c->adapter->algo_data is NULL!\n");
                return -EIO;
        }

        /* rising SAA7134_GPIO_GPRESCAN reads the status */

        saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
        saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

        gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

        /* GPIO&0x100 is pulsed low when a button is pressed. Don't do
           I2C receive if gpio&0x100 is not low. */

        if (gpio & 0x100)
                return 0;       /* No button press */

        /* GPIO says there is a button press. Get it. */

        rc = i2c_master_recv(ir->c, &b, 1);
        if (rc != 1) {
                ir_dbg(ir, "read error\n");
                if (rc < 0)
                        return rc;
                return -EIO;
        }

        /* No button press */

        if (b == 0xff)
                return 0;

        /* Button pressed */

        input_dbg("get_key_kworld_pc150u: Key = 0x%02X\n", b);
        *protocol = RC_PROTO_UNKNOWN;
        *scancode = b;
        *toggle = 0;
        return 1;
}

static int get_key_purpletv(struct IR_i2c *ir, enum rc_proto *protocol,
                            u32 *scancode, u8 *toggle)
{
        int rc;
        unsigned char b;

        /* poll IR chip */
        rc = i2c_master_recv(ir->c, &b, 1);
        if (rc != 1) {
                ir_dbg(ir, "read error\n");
                if (rc < 0)
                        return rc;
                return -EIO;
        }

        /* no button press */
        if (b==0)
                return 0;

        /* repeating */
        if (b & 0x80)
                return 1;

        *protocol = RC_PROTO_UNKNOWN;
        *scancode = b;
        *toggle = 0;
        return 1;
}

static int get_key_beholdm6xx(struct IR_i2c *ir, enum rc_proto *protocol,
                              u32 *scancode, u8 *toggle)
{
        int rc;
        unsigned char data[12];
        u32 gpio;

        struct saa7134_dev *dev = ir->c->adapter->algo_data;

        /* rising SAA7134_GPIO_GPRESCAN reads the status */
        saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
        saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);

        gpio = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2);

        if (0x400000 & ~gpio)
                return 0; /* No button press */

        ir->c->addr = 0x5a >> 1;

        rc = i2c_master_recv(ir->c, data, 12);
        if (rc != 12) {
                ir_dbg(ir, "read error\n");
                if (rc < 0)
                        return rc;
                return -EIO;
        }

        if (data[9] != (unsigned char)(~data[8]))
                return 0;

        *protocol = RC_PROTO_NECX;
        *scancode = RC_SCANCODE_NECX(data[11] << 8 | data[10], data[9]);
        *toggle = 0;
        return 1;
}

/* Common (grey or coloured) pinnacle PCTV remote handling
 *
 */
static int get_key_pinnacle(struct IR_i2c *ir, enum rc_proto *protocol,
                            u32 *scancode, u8 *toggle, int parity_offset,
                            int marker, int code_modulo)
{
        int rc;
        unsigned char b[4];
        unsigned int start = 0,parity = 0,code = 0;

        /* poll IR chip */
        rc = i2c_master_recv(ir->c, b, 4);
        if (rc != 4) {
                ir_dbg(ir, "read error\n");
                if (rc < 0)
                        return rc;
                return -EIO;
        }

        for (start = 0; start < ARRAY_SIZE(b); start++) {
                if (b[start] == marker) {
                        code=b[(start+parity_offset + 1) % 4];
                        parity=b[(start+parity_offset) % 4];
                }
        }

        /* Empty Request */
        if (parity == 0)
                return 0;

        /* Repeating... */
        if (ir->old == parity)
                return 0;

        ir->old = parity;

        /* drop special codes when a key is held down a long time for the grey controller
           In this case, the second bit of the code is asserted */
        if (marker == 0xfe && (code & 0x40))
                return 0;

        code %= code_modulo;

        *protocol = RC_PROTO_UNKNOWN;
        *scancode = code;
        *toggle = 0;

        ir_dbg(ir, "Pinnacle PCTV key %02x\n", code);
        return 1;
}

/* The grey pinnacle PCTV remote
 *
 *  There are one issue with this remote:
 *   - I2c packet does not change when the same key is pressed quickly. The workaround
 *     is to hold down each key for about half a second, so that another code is generated
 *     in the i2c packet, and the function can distinguish key presses.
 *
 * Sylvain Pasche <sylvain.pasche@gmail.com>
 */
static int get_key_pinnacle_grey(struct IR_i2c *ir, enum rc_proto *protocol,
                                 u32 *scancode, u8 *toggle)
{

        return get_key_pinnacle(ir, protocol, scancode, toggle, 1, 0xfe, 0xff);
}


/* The new pinnacle PCTV remote (with the colored buttons)
 *
 * Ricardo Cerqueira <v4l@cerqueira.org>
 */
static int get_key_pinnacle_color(struct IR_i2c *ir, enum rc_proto *protocol,
                                  u32 *scancode, u8 *toggle)
{
        /* code_modulo parameter (0x88) is used to reduce code value to fit inside IR_KEYTAB_SIZE
         *
         * this is the only value that results in 42 unique
         * codes < 128
         */

        return get_key_pinnacle(ir, protocol, scancode, toggle, 2, 0x80, 0x88);
}

void saa7134_input_irq(struct saa7134_dev *dev)
{
        struct saa7134_card_ir *ir;

        if (!dev || !dev->remote)
                return;

        ir = dev->remote;
        if (!ir->running)
                return;

        if (!ir->polling && !ir->raw_decode) {
                build_key(dev);
        } else if (ir->raw_decode) {
                saa7134_raw_decode_irq(dev);
        }
}

static void saa7134_input_timer(struct timer_list *t)
{
        struct saa7134_card_ir *ir = timer_container_of(ir, t, timer);
        struct saa7134_dev *dev = ir->dev->priv;

        build_key(dev);
        mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
}

int saa7134_ir_open(struct rc_dev *rc)
{
        struct saa7134_dev *dev = rc->priv;
        struct saa7134_card_ir *ir = dev->remote;

        /* Moved here from saa7134_input_init1() because the latter
         * is not called on device resume */
        switch (dev->board) {
        case SAA7134_BOARD_MD2819:
        case SAA7134_BOARD_KWORLD_VSTREAM_XPERT:
        case SAA7134_BOARD_AVERMEDIA_305:
        case SAA7134_BOARD_AVERMEDIA_307:
        case SAA7134_BOARD_AVERMEDIA_505:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_305:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_505:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_307:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_507:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_507UA:
        case SAA7134_BOARD_AVERMEDIA_GO_007_FM:
        case SAA7134_BOARD_AVERMEDIA_M102:
        case SAA7134_BOARD_AVERMEDIA_GO_007_FM_PLUS:
                /* Without this we won't receive key up events */
                saa_setb(SAA7134_GPIO_GPMODE0, 0x4);
                saa_setb(SAA7134_GPIO_GPSTATUS0, 0x4);
                break;
        case SAA7134_BOARD_AVERMEDIA_777:
        case SAA7134_BOARD_AVERMEDIA_A16AR:
                /* Without this we won't receive key up events */
                saa_setb(SAA7134_GPIO_GPMODE1, 0x1);
                saa_setb(SAA7134_GPIO_GPSTATUS1, 0x1);
                break;
        case SAA7134_BOARD_AVERMEDIA_A16D:
                /* Without this we won't receive key up events */
                saa_setb(SAA7134_GPIO_GPMODE1, 0x1);
                saa_setb(SAA7134_GPIO_GPSTATUS1, 0x1);
                break;
        case SAA7134_BOARD_GOTVIEW_7135:
                saa_setb(SAA7134_GPIO_GPMODE1, 0x80);
                break;
        }

        ir->running = true;

        if (ir->polling) {
                timer_setup(&ir->timer, saa7134_input_timer, 0);
                ir->timer.expires = jiffies + HZ;
                add_timer(&ir->timer);
        }

        return 0;
}

void saa7134_ir_close(struct rc_dev *rc)
{
        struct saa7134_dev *dev = rc->priv;
        struct saa7134_card_ir *ir = dev->remote;

        if (ir->polling)
                timer_delete_sync(&ir->timer);

        ir->running = false;
}

int saa7134_input_init1(struct saa7134_dev *dev)
{
        struct saa7134_card_ir *ir;
        struct rc_dev *rc;
        char *ir_codes = NULL;
        u32 mask_keycode = 0;
        u32 mask_keydown = 0;
        u32 mask_keyup   = 0;
        unsigned polling = 0;
        bool raw_decode  = false;
        int err;

        if (dev->has_remote != SAA7134_REMOTE_GPIO)
                return -ENODEV;
        if (disable_ir)
                return -ENODEV;

        /* detect & configure */
        switch (dev->board) {
        case SAA7134_BOARD_FLYVIDEO2000:
        case SAA7134_BOARD_FLYVIDEO3000:
        case SAA7134_BOARD_FLYTVPLATINUM_FM:
        case SAA7134_BOARD_FLYTVPLATINUM_MINI2:
        case SAA7134_BOARD_ROVERMEDIA_LINK_PRO_FM:
                ir_codes     = RC_MAP_FLYVIDEO;
                mask_keycode = 0xEC00000;
                mask_keydown = 0x0040000;
                break;
        case SAA7134_BOARD_CINERGY400:
        case SAA7134_BOARD_CINERGY600:
        case SAA7134_BOARD_CINERGY600_MK3:
                ir_codes     = RC_MAP_CINERGY;
                mask_keycode = 0x00003f;
                mask_keyup   = 0x040000;
                break;
        case SAA7134_BOARD_ECS_TVP3XP:
        case SAA7134_BOARD_ECS_TVP3XP_4CB5:
                ir_codes     = RC_MAP_EZTV;
                mask_keycode = 0x00017c;
                mask_keyup   = 0x000002;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_KWORLD_XPERT:
        case SAA7134_BOARD_AVACSSMARTTV:
                ir_codes     = RC_MAP_PIXELVIEW;
                mask_keycode = 0x00001F;
                mask_keyup   = 0x000020;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_MD2819:
        case SAA7134_BOARD_KWORLD_VSTREAM_XPERT:
        case SAA7134_BOARD_AVERMEDIA_305:
        case SAA7134_BOARD_AVERMEDIA_307:
        case SAA7134_BOARD_AVERMEDIA_505:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_305:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_505:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_307:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_507:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_507UA:
        case SAA7134_BOARD_AVERMEDIA_GO_007_FM:
        case SAA7134_BOARD_AVERMEDIA_M102:
        case SAA7134_BOARD_AVERMEDIA_GO_007_FM_PLUS:
                ir_codes     = RC_MAP_AVERMEDIA;
                mask_keycode = 0x0007C8;
                mask_keydown = 0x000010;
                polling      = 50; // ms
                /* GPIO stuff moved to saa7134_ir_open() */
                break;
        case SAA7134_BOARD_AVERMEDIA_M135A:
                ir_codes     = RC_MAP_AVERMEDIA_M135A;
                mask_keydown = 0x0040000;       /* Enable GPIO18 line on both edges */
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        case SAA7134_BOARD_AVERMEDIA_M733A:
                ir_codes     = RC_MAP_AVERMEDIA_M733A_RM_K6;
                mask_keydown = 0x0040000;
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        case SAA7134_BOARD_AVERMEDIA_777:
        case SAA7134_BOARD_AVERMEDIA_A16AR:
                ir_codes     = RC_MAP_AVERMEDIA;
                mask_keycode = 0x02F200;
                mask_keydown = 0x000400;
                polling      = 50; // ms
                /* GPIO stuff moved to saa7134_ir_open() */
                break;
        case SAA7134_BOARD_AVERMEDIA_A16D:
                ir_codes     = RC_MAP_AVERMEDIA_A16D;
                mask_keycode = 0x02F200;
                mask_keydown = 0x000400;
                polling      = 50; /* ms */
                /* GPIO stuff moved to saa7134_ir_open() */
                break;
        case SAA7134_BOARD_KWORLD_TERMINATOR:
                ir_codes     = RC_MAP_PIXELVIEW;
                mask_keycode = 0x00001f;
                mask_keyup   = 0x000060;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_MANLI_MTV001:
        case SAA7134_BOARD_MANLI_MTV002:
                ir_codes     = RC_MAP_MANLI;
                mask_keycode = 0x001f00;
                mask_keyup   = 0x004000;
                polling      = 50; /* ms */
                break;
        case SAA7134_BOARD_BEHOLD_409FM:
        case SAA7134_BOARD_BEHOLD_401:
        case SAA7134_BOARD_BEHOLD_403:
        case SAA7134_BOARD_BEHOLD_403FM:
        case SAA7134_BOARD_BEHOLD_405:
        case SAA7134_BOARD_BEHOLD_405FM:
        case SAA7134_BOARD_BEHOLD_407:
        case SAA7134_BOARD_BEHOLD_407FM:
        case SAA7134_BOARD_BEHOLD_409:
        case SAA7134_BOARD_BEHOLD_505FM:
        case SAA7134_BOARD_BEHOLD_505RDS_MK5:
        case SAA7134_BOARD_BEHOLD_505RDS_MK3:
        case SAA7134_BOARD_BEHOLD_507_9FM:
        case SAA7134_BOARD_BEHOLD_507RDS_MK3:
        case SAA7134_BOARD_BEHOLD_507RDS_MK5:
                ir_codes     = RC_MAP_MANLI;
                mask_keycode = 0x003f00;
                mask_keyup   = 0x004000;
                polling      = 50; /* ms */
                break;
        case SAA7134_BOARD_BEHOLD_COLUMBUS_TVFM:
                ir_codes     = RC_MAP_BEHOLD_COLUMBUS;
                mask_keycode = 0x003f00;
                mask_keyup   = 0x004000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_SEDNA_PC_TV_CARDBUS:
                ir_codes     = RC_MAP_PCTV_SEDNA;
                mask_keycode = 0x001f00;
                mask_keyup   = 0x004000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_GOTVIEW_7135:
                ir_codes     = RC_MAP_GOTVIEW7135;
                mask_keycode = 0x0003CC;
                mask_keydown = 0x000010;
                polling      = 5; /* ms */
                /* GPIO stuff moved to saa7134_ir_open() */
                break;
        case SAA7134_BOARD_VIDEOMATE_TV_PVR:
        case SAA7134_BOARD_VIDEOMATE_GOLD_PLUS:
        case SAA7134_BOARD_VIDEOMATE_TV_GOLD_PLUSII:
                ir_codes     = RC_MAP_VIDEOMATE_TV_PVR;
                mask_keycode = 0x00003F;
                mask_keyup   = 0x400000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_PROTEUS_2309:
                ir_codes     = RC_MAP_PROTEUS_2309;
                mask_keycode = 0x00007F;
                mask_keyup   = 0x000080;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_VIDEOMATE_DVBT_300:
        case SAA7134_BOARD_VIDEOMATE_DVBT_200:
                ir_codes     = RC_MAP_VIDEOMATE_TV_PVR;
                mask_keycode = 0x003F00;
                mask_keyup   = 0x040000;
                break;
        case SAA7134_BOARD_FLYDVBS_LR300:
        case SAA7134_BOARD_FLYDVBT_LR301:
        case SAA7134_BOARD_FLYDVBTDUO:
                ir_codes     = RC_MAP_FLYDVB;
                mask_keycode = 0x0001F00;
                mask_keydown = 0x0040000;
                break;
        case SAA7134_BOARD_ASUSTeK_P7131_DUAL:
        case SAA7134_BOARD_ASUSTeK_P7131_HYBRID_LNA:
        case SAA7134_BOARD_ASUSTeK_P7131_ANALOG:
                ir_codes     = RC_MAP_ASUS_PC39;
                mask_keydown = 0x0040000;       /* Enable GPIO18 line on both edges */
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        case SAA7134_BOARD_ASUSTeK_PS3_100:
                ir_codes     = RC_MAP_ASUS_PS3_100;
                mask_keydown = 0x0040000;
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        case SAA7134_BOARD_ENCORE_ENLTV:
        case SAA7134_BOARD_ENCORE_ENLTV_FM:
                ir_codes     = RC_MAP_ENCORE_ENLTV;
                mask_keycode = 0x00007f;
                mask_keyup   = 0x040000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_ENCORE_ENLTV_FM53:
        case SAA7134_BOARD_ENCORE_ENLTV_FM3:
                ir_codes     = RC_MAP_ENCORE_ENLTV_FM53;
                mask_keydown = 0x0040000;       /* Enable GPIO18 line on both edges */
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        case SAA7134_BOARD_10MOONSTVMASTER3:
                ir_codes     = RC_MAP_ENCORE_ENLTV;
                mask_keycode = 0x5f80000;
                mask_keyup   = 0x8000000;
                polling      = 50; //ms
                break;
        case SAA7134_BOARD_GENIUS_TVGO_A11MCE:
                ir_codes     = RC_MAP_GENIUS_TVGO_A11MCE;
                mask_keycode = 0xff;
                mask_keydown = 0xf00000;
                polling = 50; /* ms */
                break;
        case SAA7134_BOARD_REAL_ANGEL_220:
                ir_codes     = RC_MAP_REAL_AUDIO_220_32_KEYS;
                mask_keycode = 0x3f00;
                mask_keyup   = 0x4000;
                polling = 50; /* ms */
                break;
        case SAA7134_BOARD_KWORLD_PLUS_TV_ANALOG:
                ir_codes     = RC_MAP_KWORLD_PLUS_TV_ANALOG;
                mask_keycode = 0x7f;
                polling = 40; /* ms */
                break;
        case SAA7134_BOARD_VIDEOMATE_S350:
                ir_codes     = RC_MAP_VIDEOMATE_S350;
                mask_keycode = 0x003f00;
                mask_keydown = 0x040000;
                break;
        case SAA7134_BOARD_LEADTEK_WINFAST_DTV1000S:
                ir_codes     = RC_MAP_WINFAST;
                mask_keycode = 0x5f00;
                mask_keyup   = 0x020000;
                polling      = 50; /* ms */
                break;
        case SAA7134_BOARD_VIDEOMATE_M1F:
                ir_codes     = RC_MAP_VIDEOMATE_K100;
                mask_keycode = 0x0ff00;
                mask_keyup   = 0x040000;
                break;
        case SAA7134_BOARD_HAUPPAUGE_HVR1150:
        case SAA7134_BOARD_HAUPPAUGE_HVR1120:
                ir_codes     = RC_MAP_HAUPPAUGE;
                mask_keydown = 0x0040000;       /* Enable GPIO18 line on both edges */
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        case SAA7134_BOARD_LEADTEK_WINFAST_TV2100_FM:
                ir_codes     = RC_MAP_LEADTEK_Y04G0051;
                mask_keydown = 0x0040000;       /* Enable GPIO18 line on both edges */
                mask_keyup   = 0x0040000;
                mask_keycode = 0xffff;
                raw_decode   = true;
                break;
        }
        if (NULL == ir_codes) {
                pr_err("Oops: IR config error [card=%d]\n", dev->board);
                return -ENODEV;
        }

        ir = kzalloc_obj(*ir);
        rc = rc_allocate_device(RC_DRIVER_SCANCODE);
        if (!ir || !rc) {
                err = -ENOMEM;
                goto err_out_free;
        }

        ir->dev = rc;
        dev->remote = ir;

        /* init hardware-specific stuff */
        ir->mask_keycode = mask_keycode;
        ir->mask_keydown = mask_keydown;
        ir->mask_keyup   = mask_keyup;
        ir->polling      = polling;
        ir->raw_decode   = raw_decode;

        /* init input device */
        snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
                 pci_name(dev->pci));

        rc->priv = dev;
        rc->open = saa7134_ir_open;
        rc->close = saa7134_ir_close;
        if (raw_decode) {
                rc->driver_type = RC_DRIVER_IR_RAW;
                rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
        }

        rc->device_name = saa7134_boards[dev->board].name;
        rc->input_phys = ir->phys;
        rc->input_id.bustype = BUS_PCI;
        rc->input_id.version = 1;
        if (dev->pci->subsystem_vendor) {
                rc->input_id.vendor  = dev->pci->subsystem_vendor;
                rc->input_id.product = dev->pci->subsystem_device;
        } else {
                rc->input_id.vendor  = dev->pci->vendor;
                rc->input_id.product = dev->pci->device;
        }
        rc->dev.parent = &dev->pci->dev;
        rc->map_name = ir_codes;
        rc->driver_name = MODULE_NAME;
        rc->min_timeout = 1;
        rc->timeout = IR_DEFAULT_TIMEOUT;
        rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;

        err = rc_register_device(rc);
        if (err)
                goto err_out_free;

        return 0;

err_out_free:
        rc_free_device(rc);
        dev->remote = NULL;
        kfree(ir);
        return err;
}

void saa7134_input_fini(struct saa7134_dev *dev)
{
        if (NULL == dev->remote)
                return;

        rc_unregister_device(dev->remote->dev);
        rc_free_device(dev->remote->dev);
        kfree(dev->remote);
        dev->remote = NULL;
}

void saa7134_probe_i2c_ir(struct saa7134_dev *dev)
{
        struct i2c_board_info info;
        struct i2c_msg msg_msi = {
                .addr = 0x50,
                .flags = I2C_M_RD,
                .len = 0,
                .buf = NULL,
        };
        int rc;

        if (disable_ir) {
                input_dbg("IR has been disabled, not probing for i2c remote\n");
                return;
        }

        memset(&info, 0, sizeof(struct i2c_board_info));
        memset(&dev->init_data, 0, sizeof(dev->init_data));
        strscpy(info.type, "ir_video", I2C_NAME_SIZE);

        switch (dev->board) {
        case SAA7134_BOARD_PINNACLE_PCTV_110i:
        case SAA7134_BOARD_PINNACLE_PCTV_310i:
                dev->init_data.name = "Pinnacle PCTV";
                if (pinnacle_remote == 0) {
                        dev->init_data.get_key = get_key_pinnacle_color;
                        dev->init_data.ir_codes = RC_MAP_PINNACLE_COLOR;
                        info.addr = 0x47;
                } else {
                        dev->init_data.get_key = get_key_pinnacle_grey;
                        dev->init_data.ir_codes = RC_MAP_PINNACLE_GREY;
                        info.addr = 0x47;
                }
                break;
        case SAA7134_BOARD_UPMOST_PURPLE_TV:
                dev->init_data.name = "Purple TV";
                dev->init_data.get_key = get_key_purpletv;
                dev->init_data.ir_codes = RC_MAP_PURPLETV;
                info.addr = 0x7a;
                break;
        case SAA7134_BOARD_MSI_TVATANYWHERE_PLUS:
                dev->init_data.name = "MSI TV@nywhere Plus";
                dev->init_data.get_key = get_key_msi_tvanywhere_plus;
                dev->init_data.ir_codes = RC_MAP_MSI_TVANYWHERE_PLUS;
                /*
                 * MSI TV@nyware Plus requires more frequent polling
                 * otherwise it will miss some keypresses
                 */
                dev->init_data.polling_interval = 50;
                info.addr = 0x30;
                /* MSI TV@nywhere Plus controller doesn't seem to
                   respond to probes unless we read something from
                   an existing device. Weird...
                   REVISIT: might no longer be needed */
                rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
                input_dbg("probe 0x%02x @ %s: %s\n",
                        msg_msi.addr, dev->i2c_adap.name,
                        (1 == rc) ? "yes" : "no");
                break;
        case SAA7134_BOARD_SNAZIO_TVPVR_PRO:
                dev->init_data.name = "SnaZio* TVPVR PRO";
                dev->init_data.get_key = get_key_msi_tvanywhere_plus;
                dev->init_data.ir_codes = RC_MAP_MSI_TVANYWHERE_PLUS;
                /*
                 * MSI TV@nyware Plus requires more frequent polling
                 * otherwise it will miss some keypresses
                 */
                dev->init_data.polling_interval = 50;
                info.addr = 0x30;
                /*
                 * MSI TV@nywhere Plus controller doesn't seem to
                 *  respond to probes unless we read something from
                 *  an existing device. Weird...
                 * REVISIT: might no longer be needed
                 */
                rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
                input_dbg("probe 0x%02x @ %s: %s\n",
                        msg_msi.addr, dev->i2c_adap.name,
                        (rc == 1) ? "yes" : "no");
                break;
        case SAA7134_BOARD_KWORLD_PC150U:
                /* copied and modified from MSI TV@nywhere Plus */
                dev->init_data.name = "Kworld PC150-U";
                dev->init_data.get_key = get_key_kworld_pc150u;
                dev->init_data.ir_codes = RC_MAP_KWORLD_PC150U;
                info.addr = 0x30;
                /* MSI TV@nywhere Plus controller doesn't seem to
                   respond to probes unless we read something from
                   an existing device. Weird...
                   REVISIT: might no longer be needed */
                rc = i2c_transfer(&dev->i2c_adap, &msg_msi, 1);
                input_dbg("probe 0x%02x @ %s: %s\n",
                        msg_msi.addr, dev->i2c_adap.name,
                        (1 == rc) ? "yes" : "no");
                break;
        case SAA7134_BOARD_HAUPPAUGE_HVR1110:
                dev->init_data.name = saa7134_boards[dev->board].name;
                dev->init_data.ir_codes = RC_MAP_HAUPPAUGE;
                dev->init_data.type = RC_PROTO_BIT_RC5 |
                                RC_PROTO_BIT_RC6_MCE | RC_PROTO_BIT_RC6_6A_32;
                dev->init_data.internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
                info.addr = 0x71;
                break;
        case SAA7134_BOARD_BEHOLD_607FM_MK3:
        case SAA7134_BOARD_BEHOLD_607FM_MK5:
        case SAA7134_BOARD_BEHOLD_609FM_MK3:
        case SAA7134_BOARD_BEHOLD_609FM_MK5:
        case SAA7134_BOARD_BEHOLD_607RDS_MK3:
        case SAA7134_BOARD_BEHOLD_607RDS_MK5:
        case SAA7134_BOARD_BEHOLD_609RDS_MK3:
        case SAA7134_BOARD_BEHOLD_609RDS_MK5:
        case SAA7134_BOARD_BEHOLD_M6:
        case SAA7134_BOARD_BEHOLD_M63:
        case SAA7134_BOARD_BEHOLD_M6_EXTRA:
        case SAA7134_BOARD_BEHOLD_H6:
        case SAA7134_BOARD_BEHOLD_X7:
        case SAA7134_BOARD_BEHOLD_H7:
        case SAA7134_BOARD_BEHOLD_A7:
                dev->init_data.name = "BeholdTV";
                dev->init_data.get_key = get_key_beholdm6xx;
                dev->init_data.ir_codes = RC_MAP_BEHOLD;
                dev->init_data.type = RC_PROTO_BIT_NECX;
                info.addr = 0x2d;
                break;
        case SAA7134_BOARD_AVERMEDIA_CARDBUS_501:
        case SAA7134_BOARD_AVERMEDIA_CARDBUS_506:
                info.addr = 0x40;
                break;
        case SAA7134_BOARD_AVERMEDIA_A706:
                info.addr = 0x41;
                break;
        case SAA7134_BOARD_FLYDVB_TRIO:
                dev->init_data.name = "FlyDVB Trio";
                dev->init_data.get_key = get_key_flydvb_trio;
                dev->init_data.ir_codes = RC_MAP_FLYDVB;
                info.addr = 0x0b;
                break;
        default:
                input_dbg("No I2C IR support for board %x\n", dev->board);
                return;
        }

        if (dev->init_data.name)
                info.platform_data = &dev->init_data;
        i2c_new_client_device(&dev->i2c_adap, &info);
}

static int saa7134_raw_decode_irq(struct saa7134_dev *dev)
{
        struct saa7134_card_ir *ir = dev->remote;
        int space;

        /* Generate initial event */
        saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
        saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
        space = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2) & ir->mask_keydown;
        ir_raw_event_store_edge(dev->remote->dev, !space);

        return 1;
}