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Subject: V4L/DVB: v4l2_subdev, cx23885: Differentiate IR carrier sense and I/O pin inversion Author: Andy Walls <awa...@md.metrocast.net> Date: Sun Jul 18 19:57:25 2010 -0300 There is a distinction on IR Tx for the CX2388[578] chips of carrier sense inversion (space is a carrier burst and mark is no burst) and I/O pin level inversion (0 is high output level, 1 is low output level). Allow the caller to set these parameters distinctly as v4l2_subdevice IR parameters. This permits the IR device to be configured and enabled without the IR Tx LED being on during idle/space time due to an external hardware level inversion Signed-off-by: Andy Walls <awa...@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com> drivers/media/video/cx23885/cx23885-input.c | 2 +- drivers/media/video/cx23885/cx23888-ir.c | 32 ++++++++++++++++++++------ include/media/v4l2-subdev.h | 5 +++- 3 files changed, 29 insertions(+), 10 deletions(-) --- http://git.linuxtv.org/media-tree.git?a=commitdiff;h=5a28d9a320c865007da830c065bcaecfe91b3932 diff --git a/drivers/media/video/cx23885/cx23885-input.c b/drivers/media/video/cx23885/cx23885-input.c index d0b1613..496d751 100644 --- a/drivers/media/video/cx23885/cx23885-input.c +++ b/drivers/media/video/cx23885/cx23885-input.c @@ -170,7 +170,7 @@ static int cx23885_input_ir_start(struct cx23885_dev *dev) * mark is received as low logic level; * falling edges are detected as rising edges; etc. */ - params.invert = true; + params.invert_level = true; break; } v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); diff --git a/drivers/media/video/cx23885/cx23888-ir.c b/drivers/media/video/cx23885/cx23888-ir.c index f63d378..28ca90f 100644 --- a/drivers/media/video/cx23885/cx23888-ir.c +++ b/drivers/media/video/cx23885/cx23888-ir.c @@ -60,6 +60,8 @@ MODULE_PARM_DESC(ir_888_debug, "enable debug messages [CX23888 IR controller]"); #define CNTRL_CPL 0x00001000 #define CNTRL_LBM 0x00002000 #define CNTRL_R 0x00004000 +/* CX23888 specific control flag */ +#define CNTRL_IVO 0x00008000 #define CX23888_IR_TXCLK_REG 0x170004 #define TXCLK_TCD 0x0000FFFF @@ -423,6 +425,13 @@ static inline void control_tx_polarity_invert(struct cx23885_dev *dev, invert ? CNTRL_CPL : 0); } +static inline void control_tx_level_invert(struct cx23885_dev *dev, + bool invert) +{ + cx23888_ir_and_or4(dev, CX23888_IR_CNTRL_REG, ~CNTRL_IVO, + invert ? CNTRL_IVO : 0); +} + /* * IR Rx & Tx Clock Register helpers */ @@ -782,8 +791,8 @@ static int cx23888_ir_rx_s_parameters(struct v4l2_subdev *sd, control_rx_s_edge_detection(dev, CNTRL_EDG_BOTH); - o->invert = p->invert; - atomic_set(&state->rx_invert, p->invert); + o->invert_level = p->invert_level; + atomic_set(&state->rx_invert, p->invert_level); o->interrupt_enable = p->interrupt_enable; o->enable = p->enable; @@ -894,8 +903,11 @@ static int cx23888_ir_tx_s_parameters(struct v4l2_subdev *sd, /* FIXME - make this dependent on resolution for better performance */ control_tx_irq_watermark(dev, TX_FIFO_HALF_EMPTY); - control_tx_polarity_invert(dev, p->invert); - o->invert = p->invert; + control_tx_polarity_invert(dev, p->invert_carrier_sense); + o->invert_carrier_sense = p->invert_carrier_sense; + + control_tx_level_invert(dev, p->invert_level); + o->invert_level = p->invert_level; o->interrupt_enable = p->interrupt_enable; o->enable = p->enable; @@ -1025,8 +1037,11 @@ static int cx23888_ir_log_status(struct v4l2_subdev *sd) cntrl & CNTRL_TFE ? "enabled" : "disabled"); v4l2_info(sd, "\tFIFO interrupt watermark: %s\n", cntrl & CNTRL_TIC ? "not empty" : "half full or less"); - v4l2_info(sd, "\tSignal polarity: %s\n", - cntrl & CNTRL_CPL ? "0:mark 1:space" : "0:space 1:mark"); + v4l2_info(sd, "\tOutput pin level inversion %s\n", + cntrl & CNTRL_IVO ? "yes" : "no"); + v4l2_info(sd, "\tCarrier polarity: %s\n", + cntrl & CNTRL_CPL ? "space:burst mark:noburst" + : "space:noburst mark:burst"); if (cntrl & CNTRL_MOD) { v4l2_info(sd, "\tCarrier (16 clocks): %u Hz\n", clock_divider_to_carrier_freq(txclk)); @@ -1146,7 +1161,7 @@ static const struct v4l2_subdev_ir_parameters default_rx_params = { .noise_filter_min_width = 333333, /* ns */ .carrier_range_lower = 35000, .carrier_range_upper = 37000, - .invert = false, + .invert_level = false, }; static const struct v4l2_subdev_ir_parameters default_tx_params = { @@ -1160,7 +1175,8 @@ static const struct v4l2_subdev_ir_parameters default_tx_params = { .modulation = true, .carrier_freq = 36000, /* 36 kHz - RC-5 carrier */ .duty_cycle = 25, /* 25 % - RC-5 carrier */ - .invert = false, + .invert_level = false, + .invert_carrier_sense = false, }; int cx23888_ir_probe(struct cx23885_dev *dev) diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index 9195ad4..a780cca 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -379,7 +379,10 @@ struct v4l2_subdev_ir_parameters { u32 max_pulse_width; /* ns, valid only for baseband signal */ unsigned int carrier_freq; /* Hz, valid only for modulated signal*/ unsigned int duty_cycle; /* percent, valid only for modulated signal*/ - bool invert; /* logically invert sense of mark/space */ + bool invert_level; /* invert signal level */ + + /* Tx only */ + bool invert_carrier_sense; /* Send 0/space as a carrier burst */ /* Rx only */ u32 noise_filter_min_width; /* ns, min time of a valid pulse */ _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
