ClabureDB: Classified Bug-Reports Database

  /*
   *
   * handle saa7134 IR remotes via linux kernel input layer.
   *
   * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  *
  */
 
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/input.h>
 
 #include "saa7134-reg.h"
 #include "saa7134.h"
 
 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)");
 
 static int ir_rc5_remote_gap = 885;
 module_param(ir_rc5_remote_gap, int, 0644);
 static int ir_rc5_key_timeout = 115;
 module_param(ir_rc5_key_timeout, int, 0644);
 
 static int repeat_delay = 500;
 module_param(repeat_delay, int, 0644);
 MODULE_PARM_DESC(repeat_delay, "delay before key repeat started");
 static int repeat_period = 33;
 module_param(repeat_period, int, 0644);
 MODULE_PARM_DESC(repeat_period, "repeat period between "
     "keypresses when key is down");
 
 static unsigned int disable_other_ir;
 module_param(disable_other_ir, int, 0644);
 MODULE_PARM_DESC(disable_other_ir, "disable full codes of "
     "alternative remotes from other manufacturers");
 
 #define dprintk(fmt, arg...)        if (ir_debug) \
         printk(KERN_DEBUG "%s/ir: " fmt, dev->name , ## arg)
 #define i2cdprintk(fmt, arg...)    if (ir_debug) \
         printk(KERN_DEBUG "%s/ir: " fmt, ir->c.name , ## arg)
 
 /* Helper functions for RC5 and NEC decoding at GPIO16 or GPIO18 */
 static int saa7134_rc5_irq(struct saa7134_dev *dev);
 static int saa7134_nec_irq(struct saa7134_dev *dev);
 static void nec_task(unsigned long data);
 static void saa7134_nec_timer(unsigned long data);
 
 /* -------------------- GPIO generic keycode builder -------------------- */
 
 static int build_key(struct saa7134_dev *dev)
 {
         struct 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);
         dprintk("build_key gpio=0x%x mask=0x%x data=%d\n",
                 gpio, ir->mask_keycode, data);
 
        if (ir->polling) {
                if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
                    (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
                        ir_input_keydown(ir->dev, &ir->ir, data, data);
                } else {
                        ir_input_nokey(ir->dev, &ir->ir);
                }
        }
        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)))) {
                        ir_input_keydown(ir->dev, &ir->ir, data, data);
                        ir_input_nokey(ir->dev, &ir->ir);
                }
        }

        return 0;
}

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

static int get_key_msi_tvanywhere_plus(struct IR_i2c *ir, u32 *ir_key,
                                       u32 *ir_raw)
{
        unsigned char b;
        int gpio;

        /* <dev> is needed to access GPIO. Used by the saa_readl macro. */
        struct saa7134_dev *dev = ir->c.adapter->algo_data;
        if (dev == NULL) {
                dprintk("get_key_msi_tvanywhere_plus: "
                        "gir->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. */

        if (1 != i2c_master_recv(&ir->c, &b, 1)) {
                i2cdprintk("read error\n");
                return -EIO;
        }

        /* No button press */

        if (b == 0xff)
                return 0;

        /* Button pressed */

        dprintk("get_key_msi_tvanywhere_plus: Key = 0x%02X\n", b);
        *ir_key = b;
        *ir_raw = b;
        return 1;
}

static int get_key_purpletv(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
        unsigned char b;

        /* poll IR chip */
        if (1 != i2c_master_recv(&ir->c,&b,1)) {
                i2cdprintk("read error\n");
                return -EIO;
        }

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

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

        *ir_key = b;
        *ir_raw = b;
        return 1;
}

static int get_key_hvr1110(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
        unsigned char buf[5], cod4, code3, code4;

        /* poll IR chip */
        if (5 != i2c_master_recv(&ir->c,buf,5))
                return -EIO;

        cod4        = buf[4];
        code4        = (cod4 >> 2);
        code3        = buf[3];
        if (code3 == 0)
                /* no key pressed */
                return 0;

        /* return key */
        *ir_key = code4;
        *ir_raw = code4;
        return 1;
}


static int get_key_beholdm6xx(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw)
{
        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;

        if (12 != i2c_master_recv(&ir->c, data, 12)) {
                i2cdprintk("read error\n");
                return -EIO;
        }
        /* IR of this card normally decode signals NEC-standard from
         * - Sven IHOO MT 5.1R remote. xxyye718
         * - Sven DVD HD-10xx remote. xxyyf708
         * - BBK ...
         * - mayby others
         * So, skip not our, if disable full codes mode.
         */
        if (data[10] != 0x6b && data[11] != 0x86 && disable_other_ir)
                return 0;

        *ir_key = data[9];
        *ir_raw = data[9];

        return 1;
}

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

        /* poll IR chip */
        if (4 != i2c_master_recv(&ir->c, b, 4)) {
                i2cdprintk("read error\n");
                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;

        *ir_raw = code;
        *ir_key = code;

        i2cdprintk("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, u32 *ir_key, u32 *ir_raw)
{

        return get_key_pinnacle(ir, ir_key, ir_raw, 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, u32 *ir_key, u32 *ir_raw)
{
        /* 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, ir_key, ir_raw, 2, 0x80, 0x88);
}

void saa7134_input_irq(struct saa7134_dev *dev)
{
        struct card_ir *ir = dev->remote;

        if (ir->nec_gpio) {
                saa7134_nec_irq(dev);
        } else if (!ir->polling && !ir->rc5_gpio) {
                build_key(dev);
        } else if (ir->rc5_gpio) {
                saa7134_rc5_irq(dev);
        }
}

static void saa7134_input_timer(unsigned long data)
{
        struct saa7134_dev *dev = (struct saa7134_dev *)data;
        struct card_ir *ir = dev->remote;

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

void saa7134_ir_start(struct saa7134_dev *dev, struct card_ir *ir)
{
        if (ir->polling) {
                setup_timer(&ir->timer, saa7134_input_timer,
                            (unsigned long)dev);
                ir->timer.expires  = jiffies + HZ;
                add_timer(&ir->timer);
        } else if (ir->rc5_gpio) {
                /* set timer_end for code completion */
                init_timer(&ir->timer_end);
                ir->timer_end.function = ir_rc5_timer_end;
                ir->timer_end.data = (unsigned long)ir;
                init_timer(&ir->timer_keyup);
                ir->timer_keyup.function = ir_rc5_timer_keyup;
                ir->timer_keyup.data = (unsigned long)ir;
                ir->shift_by = 2;
                ir->start = 0x2;
                ir->addr = 0x17;
                ir->rc5_key_timeout = ir_rc5_key_timeout;
                ir->rc5_remote_gap = ir_rc5_remote_gap;
        } else if (ir->nec_gpio) {
                setup_timer(&ir->timer_keyup, saa7134_nec_timer,
                            (unsigned long)dev);
                tasklet_init(&ir->tlet, nec_task, (unsigned long)dev);
        }
}

void saa7134_ir_stop(struct saa7134_dev *dev)
{
        if (dev->remote->polling)
                del_timer_sync(&dev->remote->timer);
}

int saa7134_input_init1(struct saa7134_dev *dev)
{
        struct card_ir *ir;
        struct input_dev *input_dev;
        IR_KEYTAB_TYPE *ir_codes = NULL;
        u32 mask_keycode = 0;
        u32 mask_keydown = 0;
        u32 mask_keyup   = 0;
        int polling      = 0;
        int rc5_gpio         = 0;
        int nec_gpio         = 0;
        int ir_type      = IR_TYPE_OTHER;
        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:
                ir_codes     = ir_codes_flyvideo;
                mask_keycode = 0xEC00000;
                mask_keydown = 0x0040000;
                break;
        case SAA7134_BOARD_CINERGY400:
        case SAA7134_BOARD_CINERGY600:
        case SAA7134_BOARD_CINERGY600_MK3:
                ir_codes     = ir_codes_cinergy;
                mask_keycode = 0x00003f;
                mask_keyup   = 0x040000;
                break;
        case SAA7134_BOARD_ECS_TVP3XP:
        case SAA7134_BOARD_ECS_TVP3XP_4CB5:
                ir_codes     = ir_codes_eztv;
                mask_keycode = 0x00017c;
                mask_keyup   = 0x000002;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_KWORLD_XPERT:
        case SAA7134_BOARD_AVACSSMARTTV:
                ir_codes     = ir_codes_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_STUDIO_305:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_307:
        case SAA7134_BOARD_AVERMEDIA_STUDIO_507:
        case SAA7134_BOARD_AVERMEDIA_GO_007_FM:
        case SAA7134_BOARD_AVERMEDIA_M102:
                ir_codes     = ir_codes_avermedia;
                mask_keycode = 0x0007C8;
                mask_keydown = 0x000010;
                polling      = 50; // ms
                /* Set GPIO pin2 to high to enable the IR controller */
                saa_setb(SAA7134_GPIO_GPMODE0, 0x4);
                saa_setb(SAA7134_GPIO_GPSTATUS0, 0x4);
                break;
        case SAA7134_BOARD_AVERMEDIA_M135A:
                ir_codes     = ir_codes_avermedia_m135a;
                mask_keydown = 0x0040000;
                mask_keycode = 0x00013f;
                nec_gpio     = 1;
                break;
        case SAA7134_BOARD_AVERMEDIA_777:
        case SAA7134_BOARD_AVERMEDIA_A16AR:
                ir_codes     = ir_codes_avermedia;
                mask_keycode = 0x02F200;
                mask_keydown = 0x000400;
                polling      = 50; // ms
                /* 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:
                ir_codes     = ir_codes_avermedia_a16d;
                mask_keycode = 0x02F200;
                mask_keydown = 0x000400;
                polling      = 50; /* ms */
                /* 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_KWORLD_TERMINATOR:
                ir_codes     = ir_codes_pixelview;
                mask_keycode = 0x00001f;
                mask_keyup   = 0x000060;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_MANLI_MTV001:
        case SAA7134_BOARD_MANLI_MTV002:
                ir_codes     = ir_codes_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_507_9FM:
                ir_codes     = ir_codes_manli;
                mask_keycode = 0x003f00;
                mask_keyup   = 0x004000;
                polling      = 50; /* ms */
                break;
        case SAA7134_BOARD_BEHOLD_COLUMBUS_TVFM:
                ir_codes     = ir_codes_behold_columbus;
                mask_keycode = 0x003f00;
                mask_keyup   = 0x004000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_SEDNA_PC_TV_CARDBUS:
                ir_codes     = ir_codes_pctv_sedna;
                mask_keycode = 0x001f00;
                mask_keyup   = 0x004000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_GOTVIEW_7135:
                ir_codes     = ir_codes_gotview7135;
                mask_keycode = 0x0003CC;
                mask_keydown = 0x000010;
                polling             = 5; /* ms */
                saa_setb(SAA7134_GPIO_GPMODE1, 0x80);
                break;
        case SAA7134_BOARD_VIDEOMATE_TV_PVR:
        case SAA7134_BOARD_VIDEOMATE_GOLD_PLUS:
        case SAA7134_BOARD_VIDEOMATE_TV_GOLD_PLUSII:
                ir_codes     = ir_codes_videomate_tv_pvr;
                mask_keycode = 0x00003F;
                mask_keyup   = 0x400000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_PROTEUS_2309:
                ir_codes     = ir_codes_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     = ir_codes_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     = ir_codes_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     = ir_codes_asus_pc39;
                mask_keydown = 0x0040000;
                rc5_gpio = 1;
                break;
        case SAA7134_BOARD_ENCORE_ENLTV:
        case SAA7134_BOARD_ENCORE_ENLTV_FM:
                ir_codes     = ir_codes_encore_enltv;
                mask_keycode = 0x00007f;
                mask_keyup   = 0x040000;
                polling      = 50; // ms
                break;
        case SAA7134_BOARD_ENCORE_ENLTV_FM53:
                ir_codes     = ir_codes_encore_enltv_fm53;
                mask_keydown = 0x0040000;
                mask_keycode = 0x00007f;
                nec_gpio = 1;
                break;
        case SAA7134_BOARD_10MOONSTVMASTER3:
                ir_codes     = ir_codes_encore_enltv;
                mask_keycode = 0x5f80000;
                mask_keyup   = 0x8000000;
                polling      = 50; //ms
                break;
        case SAA7134_BOARD_GENIUS_TVGO_A11MCE:
                ir_codes     = ir_codes_genius_tvgo_a11mce;
                mask_keycode = 0xff;
                mask_keydown = 0xf00000;
                polling = 50; /* ms */
                break;
        case SAA7134_BOARD_REAL_ANGEL_220:
                ir_codes     = ir_codes_real_audio_220_32_keys;
                mask_keycode = 0x3f00;
                mask_keyup   = 0x4000;
                polling = 50; /* ms */
                break;
        }
        if (NULL == ir_codes) {
                printk("%s: Oops: IR config error [card=%d]\n",
                       dev->name, dev->board);
                return -ENODEV;
        }

        ir = kzalloc(sizeof(*ir), GFP_KERNEL);
        input_dev = input_allocate_device();
        if (!ir || !input_dev) {
                err = -ENOMEM;
                goto err_out_free;
        }

        ir->dev = input_dev;

        /* init hardware-specific stuff */
        ir->mask_keycode = mask_keycode;
        ir->mask_keydown = mask_keydown;
        ir->mask_keyup   = mask_keyup;
        ir->polling      = polling;
        ir->rc5_gpio         = rc5_gpio;
        ir->nec_gpio         = nec_gpio;

        /* init input device */
        snprintf(ir->name, sizeof(ir->name), "saa7134 IR (%s)",
                 saa7134_boards[dev->board].name);
        snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
                 pci_name(dev->pci));

        ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
        input_dev->name = ir->name;
        input_dev->phys = ir->phys;
        input_dev->id.bustype = BUS_PCI;
        input_dev->id.version = 1;
        if (dev->pci->subsystem_vendor) {
                input_dev->id.vendor  = dev->pci->subsystem_vendor;
                input_dev->id.product = dev->pci->subsystem_device;
        } else {
                input_dev->id.vendor  = dev->pci->vendor;
                input_dev->id.product = dev->pci->device;
        }
        input_dev->dev.parent = &dev->pci->dev;

        dev->remote = ir;
        saa7134_ir_start(dev, ir);

        err = input_register_device(ir->dev);
        if (err)
                goto err_out_stop;

        /* the remote isn't as bouncy as a keyboard */
        ir->dev->rep[REP_DELAY] = repeat_delay;
        ir->dev->rep[REP_PERIOD] = repeat_period;

        return 0;

 err_out_stop:
        saa7134_ir_stop(dev);
        dev->remote = NULL;
 err_out_free:
        input_free_device(input_dev);
        kfree(ir);
        return err;
}

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

        saa7134_ir_stop(dev);
        input_unregister_device(dev->remote->dev);
        kfree(dev->remote);
        dev->remote = NULL;
}

void saa7134_set_i2c_ir(struct saa7134_dev *dev, struct IR_i2c *ir)
{
        if (disable_ir) {
                dprintk("Found supported i2c remote, but IR has been disabled\n");
                ir->get_key=NULL;
                return;
        }

        switch (dev->board) {
        case SAA7134_BOARD_PINNACLE_PCTV_110i:
        case SAA7134_BOARD_PINNACLE_PCTV_310i:
                snprintf(ir->c.name, sizeof(ir->c.name), "Pinnacle PCTV");
                if (pinnacle_remote == 0) {
                        ir->get_key   = get_key_pinnacle_color;
                        ir->ir_codes = ir_codes_pinnacle_color;
                } else {
                        ir->get_key   = get_key_pinnacle_grey;
                        ir->ir_codes = ir_codes_pinnacle_grey;
                }
                break;
        case SAA7134_BOARD_UPMOST_PURPLE_TV:
                snprintf(ir->c.name, sizeof(ir->c.name), "Purple TV");
                ir->get_key   = get_key_purpletv;
                ir->ir_codes  = ir_codes_purpletv;
                break;
        case SAA7134_BOARD_MSI_TVATANYWHERE_PLUS:
                snprintf(ir->c.name, sizeof(ir->c.name), "MSI TV@nywhere Plus");
                ir->get_key  = get_key_msi_tvanywhere_plus;
                ir->ir_codes = ir_codes_msi_tvanywhere_plus;
                break;
        case SAA7134_BOARD_HAUPPAUGE_HVR1110:
                snprintf(ir->c.name, sizeof(ir->c.name), "HVR 1110");
                ir->get_key   = get_key_hvr1110;
                ir->ir_codes  = ir_codes_hauppauge_new;
                break;
        case SAA7134_BOARD_BEHOLD_607_9FM:
        case SAA7134_BOARD_BEHOLD_M6:
        case SAA7134_BOARD_BEHOLD_M63:
        case SAA7134_BOARD_BEHOLD_M6_EXTRA:
        case SAA7134_BOARD_BEHOLD_H6:
                snprintf(ir->c.name, sizeof(ir->c.name), "BeholdTV");
                ir->get_key   = get_key_beholdm6xx;
                ir->ir_codes  = ir_codes_behold;
                break;
        default:
                dprintk("Shouldn't get here: Unknown board %x for I2C IR?\n",dev->board);
                break;
        }

}

static int saa7134_rc5_irq(struct saa7134_dev *dev)
{
        struct card_ir *ir = dev->remote;
        struct timeval tv;
        u32 gap;
        unsigned long current_jiffies, timeout;

        /* get time of bit */
        current_jiffies = jiffies;
        do_gettimeofday(&tv);

        /* avoid overflow with gap >1s */
        if (tv.tv_sec - ir->base_time.tv_sec > 1) {
                gap = 200000;
        } else {
                gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
                    tv.tv_usec - ir->base_time.tv_usec;
        }

        /* active code => add bit */
        if (ir->active) {
                /* only if in the code (otherwise spurious IRQ or timer
                   late) */
                if (ir->last_bit < 28) {
                        ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
                            ir_rc5_remote_gap;
                        ir->code |= 1 << ir->last_bit;
                }
                /* starting new code */
        } else {
                ir->active = 1;
                ir->code = 0;
                ir->base_time = tv;
                ir->last_bit = 0;

                timeout = current_jiffies + (500 + 30 * HZ) / 1000;
                mod_timer(&ir->timer_end, timeout);
        }

        return 1;
}


/* On NEC protocol, One has 2.25 ms, and zero has 1.125 ms
   The first pulse (start) has 9 + 4.5 ms
 */

static void saa7134_nec_timer(unsigned long data)
{
        struct saa7134_dev *dev = (struct saa7134_dev *) data;
        struct card_ir *ir = dev->remote;

        dprintk("Cancel key repeat\n");

        ir_input_nokey(ir->dev, &ir->ir);
}

static void nec_task(unsigned long data)
{
        struct saa7134_dev *dev = (struct saa7134_dev *) data;
        struct card_ir *ir;
        struct timeval tv;
        int count, pulse, oldpulse, gap;
        u32 ircode = 0, not_code = 0;
        int ngap = 0;

        if (!data) {
                printk(KERN_ERR "saa713x/ir: Can't recover dev struct\n");
                /* GPIO will be kept disabled */
                return;
        }

        ir = dev->remote;

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

        oldpulse = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2) & ir->mask_keydown;
        pulse = oldpulse;

        do_gettimeofday(&tv);
        ir->base_time = tv;

        /* Decode NEC pulsecode. This code can take up to 76.5 ms to run.
           Unfortunately, using IRQ to decode pulse didn't work, since it uses
           a pulse train of 38KHz. This means one pulse on each 52 us
         */
        do {
                /* Wait until the end of pulse/space or 5 ms */
                for (count = 0; count < 500; count++)  {
                        udelay(10);
                        /* rising SAA7134_GPIO_GPRESCAN reads the status */
                        saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
                        saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
                        pulse = saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2)
                                & ir->mask_keydown;
                        if (pulse != oldpulse)
                                break;
                }

                do_gettimeofday(&tv);
                gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
                                tv.tv_usec - ir->base_time.tv_usec;

                if (!pulse) {
                        /* Bit 0 has 560 us, while bit 1 has 1120 us.
                           Do something only if bit == 1
                         */
                        if (ngap && (gap > 560 + 280)) {
                                unsigned int shift = ngap - 1;

                                /* Address first, then command */
                                if (shift < 8) {
                                        shift += 8;
                                        ircode |= 1 << shift;
                                } else if (shift < 16) {
                                        not_code |= 1 << shift;
                                } else if (shift < 24) {
                                        shift -= 16;
                                        ircode |= 1 << shift;
                                } else {
                                        shift -= 24;
                                        not_code |= 1 << shift;
                                }
                        }
                        ngap++;
                }


                ir->base_time = tv;

                /* TIMEOUT - Long pulse */
                if (gap >= 5000)
                        break;
                oldpulse = pulse;
        } while (ngap < 32);

        if (ngap == 32) {
                /* FIXME: should check if not_code == ~ircode */
                ir->code = ir_extract_bits(ircode, ir->mask_keycode);

                dprintk("scancode = 0x%02x (code = 0x%02x, notcode= 0x%02x)\n",
                         ir->code, ircode, not_code);

                ir_input_keydown(ir->dev, &ir->ir, ir->code, ir->code);
        } else
                dprintk("Repeat last key\n");

        /* Keep repeating the last key */
        mod_timer(&ir->timer_keyup, jiffies + msecs_to_jiffies(150));

        saa_setl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18);
}

static int saa7134_nec_irq(struct saa7134_dev *dev)
{
        struct card_ir *ir = dev->remote;

        saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18);
        tasklet_schedule(&ir->tlet);

        return 1;
}