/* * * 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; }