From 6c6c0b2c27e70c3593e023882fabb1cebcbd077e Mon Sep 17 00:00:00 2001 From: Mark Weaver Date: Sun, 13 Nov 2005 16:07:52 -0800 Subject: [PATCH] v4l: (939) Support for nebula rc5 based gpio remote Support for Nebula rc5-based gpio remote. Signed-off-by: Mark Weaver Signed-off-by: Nickolay V. Shmyrev Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/media/video/ir-kbd-gpio.c | 292 +++++++++++++++++++++++++++++++++++++- 1 file changed, 286 insertions(+), 6 deletions(-) (limited to 'drivers/media/video/ir-kbd-gpio.c') diff --git a/drivers/media/video/ir-kbd-gpio.c b/drivers/media/video/ir-kbd-gpio.c index ed81934ef3cd..5abfc0fbf6de 100644 --- a/drivers/media/video/ir-kbd-gpio.c +++ b/drivers/media/video/ir-kbd-gpio.c @@ -221,24 +221,99 @@ static IR_KEYTAB_TYPE ir_codes_conceptronic[IR_KEYTAB_SIZE] = { [ 24 ] = KEY_MUTE // mute/unmute }; +static IR_KEYTAB_TYPE ir_codes_nebula[IR_KEYTAB_SIZE] = { + [0x00] = KEY_KP0, + [0x01] = KEY_KP1, + [0x02] = KEY_KP2, + [0x03] = KEY_KP3, + [0x04] = KEY_KP4, + [0x05] = KEY_KP5, + [0x06] = KEY_KP6, + [0x07] = KEY_KP7, + [0x08] = KEY_KP8, + [0x09] = KEY_KP9, + [0x0a] = KEY_TV, + [0x0b] = KEY_AUX, + [0x0c] = KEY_DVD, + [0x0d] = KEY_POWER, + [0x0e] = KEY_MHP, /* labelled 'Picture' */ + [0x0f] = KEY_AUDIO, + [0x10] = KEY_INFO, + [0x11] = KEY_F13, /* 16:9 */ + [0x12] = KEY_F14, /* 14:9 */ + [0x13] = KEY_EPG, + [0x14] = KEY_EXIT, + [0x15] = KEY_MENU, + [0x16] = KEY_UP, + [0x17] = KEY_DOWN, + [0x18] = KEY_LEFT, + [0x19] = KEY_RIGHT, + [0x1a] = KEY_ENTER, + [0x1b] = KEY_CHANNELUP, + [0x1c] = KEY_CHANNELDOWN, + [0x1d] = KEY_VOLUMEUP, + [0x1e] = KEY_VOLUMEDOWN, + [0x1f] = KEY_RED, + [0x20] = KEY_GREEN, + [0x21] = KEY_YELLOW, + [0x22] = KEY_BLUE, + [0x23] = KEY_SUBTITLE, + [0x24] = KEY_F15, /* AD */ + [0x25] = KEY_TEXT, + [0x26] = KEY_MUTE, + [0x27] = KEY_REWIND, + [0x28] = KEY_STOP, + [0x29] = KEY_PLAY, + [0x2a] = KEY_FASTFORWARD, + [0x2b] = KEY_F16, /* chapter */ + [0x2c] = KEY_PAUSE, + [0x2d] = KEY_PLAY, + [0x2e] = KEY_RECORD, + [0x2f] = KEY_F17, /* picture in picture */ + [0x30] = KEY_KPPLUS, /* zoom in */ + [0x31] = KEY_KPMINUS, /* zoom out */ + [0x32] = KEY_F18, /* capture */ + [0x33] = KEY_F19, /* web */ + [0x34] = KEY_EMAIL, + [0x35] = KEY_PHONE, + [0x36] = KEY_PC +}; + struct IR { struct bttv_sub_device *sub; struct input_dev *input; struct ir_input_state ir; char name[32]; char phys[32]; + + /* Usual gpio signalling */ + u32 mask_keycode; u32 mask_keydown; u32 mask_keyup; - - int polling; + u32 polling; u32 last_gpio; struct work_struct work; struct timer_list timer; + + /* RC5 gpio */ + + u32 rc5_gpio; + struct timer_list timer_end; /* timer_end for code completion */ + struct timer_list timer_keyup; /* timer_end for key release */ + u32 last_rc5; /* last good rc5 code */ + u32 last_bit; /* last raw bit seen */ + u32 code; /* raw code under construction */ + struct timeval base_time; /* time of last seen code */ + int active; /* building raw code */ }; static int debug; module_param(debug, int, 0644); /* debug level (0,1,2) */ +static int repeat_delay = 500; +module_param(repeat_delay, int, 0644); +static int repeat_period = 33; +module_param(repeat_period, int, 0644); #define DEVNAME "ir-kbd-gpio" #define dprintk(fmt, arg...) if (debug) \ @@ -254,7 +329,7 @@ static struct bttv_sub_driver driver = { .probe = ir_probe, .remove = ir_remove, }, - .gpio_irq = ir_irq, + .gpio_irq = ir_irq, }; /* ---------------------------------------------------------------------- */ @@ -327,6 +402,173 @@ static void ir_work(void *data) mod_timer(&ir->timer, timeout); } +/* ---------------------------------------------------------------*/ + +static int rc5_remote_gap = 885; +module_param(rc5_remote_gap, int, 0644); +static int rc5_key_timeout = 200; +module_param(rc5_key_timeout, int, 0644); + +#define RC5_START(x) (((x)>>12)&3) +#define RC5_TOGGLE(x) (((x)>>11)&1) +#define RC5_ADDR(x) (((x)>>6)&31) +#define RC5_INSTR(x) ((x)&63) + +/* decode raw bit pattern to RC5 code */ +static u32 rc5_decode(unsigned int code) +{ + unsigned int org_code = code; + unsigned int pair; + unsigned int rc5 = 0; + int i; + + code = (code << 1) | 1; + for (i = 0; i < 14; ++i) { + pair = code & 0x3; + code >>= 2; + + rc5 <<= 1; + switch (pair) { + case 0: + case 2: + break; + case 1: + rc5 |= 1; + break; + case 3: + dprintk("bad code: %x\n", org_code); + return 0; + } + } + dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, " + "instr=%x\n", rc5, org_code, RC5_START(rc5), + RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5)); + return rc5; +} + +static int ir_rc5_irq(struct bttv_sub_device *sub) +{ + struct IR *ir = dev_get_drvdata(&sub->dev); + struct timeval tv; + u32 gpio; + u32 gap; + unsigned long current_jiffies, timeout; + + /* read gpio port */ + gpio = bttv_gpio_read(ir->sub->core); + + /* remote IRQ? */ + if (!(gpio & 0x20)) + return 0; + + /* 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 - rc5_remote_gap / 2) / + 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); + } + + /* toggle GPIO pin 4 to reset the irq */ + bttv_gpio_write(ir->sub->core, gpio & ~(1 << 4)); + bttv_gpio_write(ir->sub->core, gpio | (1 << 4)); + return 1; +} + +static void ir_rc5_timer_end(unsigned long data) +{ + struct IR *ir = (struct IR *)data; + struct timeval tv; + unsigned long current_jiffies, timeout; + u32 gap; + + /* get time */ + 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; + } + + /* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */ + if (gap < 28000) { + dprintk("spurious timer_end\n"); + return; + } + + ir->active = 0; + if (ir->last_bit < 20) { + /* ignore spurious codes (caused by light/other remotes) */ + dprintk("short code: %x\n", ir->code); + } else { + u32 rc5 = rc5_decode(ir->code); + + /* two start bits? */ + if (RC5_START(rc5) != 3) { + dprintk("rc5 start bits invalid: %u\n", RC5_START(rc5)); + + /* right address? */ + } else if (RC5_ADDR(rc5) == 0x0) { + u32 toggle = RC5_TOGGLE(rc5); + u32 instr = RC5_INSTR(rc5); + + /* Good code, decide if repeat/repress */ + if (toggle != RC5_TOGGLE(ir->last_rc5) || + instr != RC5_INSTR(ir->last_rc5)) { + dprintk("instruction %x, toggle %x\n", instr, + toggle); + ir_input_nokey(ir->input, &ir->ir); + ir_input_keydown(ir->input, &ir->ir, instr, + instr); + } + + /* Set/reset key-up timer */ + timeout = current_jiffies + (500 + rc5_key_timeout + * HZ) / 1000; + mod_timer(&ir->timer_keyup, timeout); + + /* Save code for repeat test */ + ir->last_rc5 = rc5; + } + } +} + +static void ir_rc5_timer_keyup(unsigned long data) +{ + struct IR *ir = (struct IR *)data; + + dprintk("key released\n"); + ir_input_nokey(ir->input, &ir->ir); +} + /* ---------------------------------------------------------------------- */ static int ir_probe(struct device *dev) @@ -400,6 +642,12 @@ static int ir_probe(struct device *dev) ir->mask_keyup = 0x006000; ir->polling = 50; // ms break; + case BTTV_BOARD_NEBULA_DIGITV: + ir_codes = ir_codes_nebula; + driver.any_irq = ir_rc5_irq; + driver.gpio_irq = NULL; + ir->rc5_gpio = 1; + break; } if (NULL == ir_codes) { kfree(ir); @@ -407,9 +655,17 @@ static int ir_probe(struct device *dev) return -ENODEV; } - /* init hardware-specific stuff */ - bttv_gpio_inout(sub->core, ir->mask_keycode | ir->mask_keydown, 0); - ir->sub = sub; + if (ir->rc5_gpio) { + u32 gpio; + /* enable remote irq */ + bttv_gpio_inout(sub->core, (1 << 4), 1 << 4); + gpio = bttv_gpio_read(sub->core); + bttv_gpio_write(sub->core, gpio & ~(1 << 4)); + bttv_gpio_write(sub->core, gpio | (1 << 4)); + } else { + /* init hardware-specific stuff */ + bttv_gpio_inout(sub->core, ir->mask_keycode | ir->mask_keydown, 0); + } /* init input device */ snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)", @@ -417,6 +673,7 @@ static int ir_probe(struct device *dev) snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(sub->core->pci)); + ir->sub = sub; ir_input_init(input_dev, &ir->ir, ir_type, ir_codes); input_dev->name = ir->name; input_dev->phys = ir->phys; @@ -437,11 +694,25 @@ static int ir_probe(struct device *dev) ir->timer.function = ir_timer; ir->timer.data = (unsigned long)ir; schedule_work(&ir->work); + } 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; } /* all done */ dev_set_drvdata(dev, ir); input_register_device(ir->input); + printk(DEVNAME ": %s detected at %s\n",ir->name,ir->phys); + + /* the remote isn't as bouncy as a keyboard */ + ir->input->rep[REP_DELAY] = repeat_delay; + ir->input->rep[REP_PERIOD] = repeat_period; return 0; } @@ -454,6 +725,15 @@ static int ir_remove(struct device *dev) del_timer(&ir->timer); flush_scheduled_work(); } + if (ir->rc5_gpio) { + u32 gpio; + + del_timer(&ir->timer_end); + flush_scheduled_work(); + + gpio = bttv_gpio_read(ir->sub->core); + bttv_gpio_write(ir->sub->core, gpio & ~(1 << 4)); + } input_unregister_device(ir->input); kfree(ir); -- cgit v1.2.3