diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-03-20 23:59:44 (GMT) |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-05-18 03:52:56 (GMT) |
commit | a3572c34da8dacc78a629211a91cf34e9b408701 (patch) | |
tree | 281efd4d69b68bd4720668fd91cfcf16d1ed3089 /drivers/media/video/saa7134 | |
parent | 0210894956cf57d525d56341cc3e0f3d5d2db659 (diff) | |
download | linux-a3572c34da8dacc78a629211a91cf34e9b408701.tar.xz |
V4L/DVB: ir-core: Add logic to decode IR protocols at the IR core
Adds a method to pass IR raw pulse/code events into ir-core. This is
needed in order to support LIRC. It also helps to move common code
from the drivers into the core.
In order to allow testing, it implements a simple NEC protocol decoder
at ir-nec-decoder.c file. The logic is about the same used at saa7134
driver that handles Avermedia M135A and Encore FM53 boards.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/saa7134')
-rw-r--r-- | drivers/media/video/saa7134/saa7134-input.c | 85 |
1 files changed, 81 insertions, 4 deletions
diff --git a/drivers/media/video/saa7134/saa7134-input.c b/drivers/media/video/saa7134/saa7134-input.c index 7e6f125e..1a7cf9c 100644 --- a/drivers/media/video/saa7134/saa7134-input.c +++ b/drivers/media/video/saa7134/saa7134-input.c @@ -68,6 +68,7 @@ MODULE_PARM_DESC(disable_other_ir, "disable full codes of " /* 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 int saa7134_raw_decode_irq(struct saa7134_dev *dev); static void nec_task(unsigned long data); static void saa7134_nec_timer(unsigned long data); @@ -403,10 +404,12 @@ void saa7134_input_irq(struct saa7134_dev *dev) if (ir->nec_gpio) { saa7134_nec_irq(dev); - } else if (!ir->polling && !ir->rc5_gpio) { + } else if (!ir->polling && !ir->rc5_gpio && !ir->raw_decode) { build_key(dev); } else if (ir->rc5_gpio) { saa7134_rc5_irq(dev); + } else if (ir->raw_decode) { + saa7134_raw_decode_irq(dev); } } @@ -419,6 +422,23 @@ static void saa7134_input_timer(unsigned long data) mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling)); } +void ir_raw_decode_timer_end(unsigned long data) +{ + struct saa7134_dev *dev = (struct saa7134_dev *)data; + struct card_ir *ir = dev->remote; + int rc; + + /* + * FIXME: the IR key handling code should be called by the decoder, + * after implementing the repeat mode + */ + rc = ir_raw_event_handle(dev->remote->dev); + if (rc >= 0) { + ir_input_keydown(ir->dev, &ir->ir, rc); + ir_input_nokey(ir->dev, &ir->ir); + } +} + void saa7134_ir_start(struct saa7134_dev *dev, struct card_ir *ir) { if (ir->running) @@ -447,6 +467,11 @@ void saa7134_ir_start(struct saa7134_dev *dev, struct card_ir *ir) setup_timer(&ir->timer_keyup, saa7134_nec_timer, (unsigned long)dev); tasklet_init(&ir->tlet, nec_task, (unsigned long)dev); + } else if (ir->raw_decode) { + /* set timer_end for code completion */ + init_timer(&ir->timer_end); + ir->timer_end.function = ir_raw_decode_timer_end; + ir->timer_end.data = (unsigned long)dev; } } @@ -462,6 +487,9 @@ void saa7134_ir_stop(struct saa7134_dev *dev) del_timer_sync(&ir->timer_end); else if (ir->nec_gpio) tasklet_kill(&ir->tlet); + else if (ir->raw_decode) + del_timer_sync(&ir->timer_end); + ir->running = 0; } @@ -509,6 +537,7 @@ int saa7134_input_init1(struct saa7134_dev *dev) int polling = 0; int rc5_gpio = 0; int nec_gpio = 0; + int raw_decode = 0; u64 ir_type = IR_TYPE_OTHER; int err; @@ -574,7 +603,7 @@ int saa7134_input_init1(struct saa7134_dev *dev) ir_codes = &ir_codes_avermedia_m135a_rm_jx_table; mask_keydown = 0x0040000; mask_keycode = 0xffff; - nec_gpio = 1; + raw_decode = 1; break; case SAA7134_BOARD_AVERMEDIA_777: case SAA7134_BOARD_AVERMEDIA_A16AR: @@ -755,6 +784,7 @@ int saa7134_input_init1(struct saa7134_dev *dev) ir->polling = polling; ir->rc5_gpio = rc5_gpio; ir->nec_gpio = nec_gpio; + ir->raw_decode = raw_decode; /* init input device */ snprintf(ir->name, sizeof(ir->name), "saa7134 IR (%s)", @@ -762,7 +792,7 @@ int saa7134_input_init1(struct saa7134_dev *dev) snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(dev->pci)); - if (ir_codes->ir_type != IR_TYPE_OTHER) { + if (ir_codes->ir_type != IR_TYPE_OTHER && !raw_decode) { ir->props.allowed_protos = IR_TYPE_RC5 | IR_TYPE_NEC; ir->props.priv = dev; ir->props.change_protocol = saa7134_ir_change_protocol; @@ -790,6 +820,11 @@ int saa7134_input_init1(struct saa7134_dev *dev) err = ir_input_register(ir->dev, ir_codes, &ir->props, MODULE_NAME); if (err) goto err_out_stop; + if (ir_codes->ir_type != IR_TYPE_OTHER) { + err = ir_raw_event_register(ir->dev); + if (err) + goto err_out_stop; + } saa7134_ir_start(dev, ir); @@ -813,6 +848,7 @@ void saa7134_input_fini(struct saa7134_dev *dev) return; saa7134_ir_stop(dev); + ir_raw_event_unregister(dev->remote->dev); ir_input_unregister(dev->remote->dev); kfree(dev->remote); dev->remote = NULL; @@ -919,6 +955,48 @@ void saa7134_probe_i2c_ir(struct saa7134_dev *dev) i2c_new_device(&dev->i2c_adap, &info); } +static int saa7134_raw_decode_irq(struct saa7134_dev *dev) +{ + struct card_ir *ir = dev->remote; + unsigned long timeout; + int count, pulse, oldpulse; + + /* Disable IR IRQ line */ + saa_clearl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18); + + /* Generate initial event */ + 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; + ir_raw_event_store(dev->remote->dev, pulse? IR_PULSE : IR_SPACE); + +#if 1 + /* Wait up to 10 ms for event change */ + oldpulse = pulse; + for (count = 0; count < 1000; 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; + } + + /* Store final event */ + ir_raw_event_store(dev->remote->dev, pulse? IR_PULSE : IR_SPACE); +#endif + /* Wait 15 ms before deciding to do something else */ + timeout = jiffies + jiffies_to_msecs(15); + mod_timer(&ir->timer_end, timeout); + + /* Enable IR IRQ line */ + saa_setl(SAA7134_IRQ2, SAA7134_IRQ2_INTE_GPIO18); + + return 1; +} + static int saa7134_rc5_irq(struct saa7134_dev *dev) { struct card_ir *ir = dev->remote; @@ -961,7 +1039,6 @@ static int saa7134_rc5_irq(struct saa7134_dev *dev) 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 */ |