V4L/DVB: cx23885, cx25840: Change IR measurment records to use struct ir_raw_event

The CX23885 and CX25840 modules were using their own simple
IR pulse width measurement record type which required conversion
when passing to the new IR core.  This change makes that record type
consistent with the new IR core and removes a data conversion.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 42 insertions, 29 deletions

diff --git a/drivers/media/video/cx25840/cx25840-ir.c b/drivers/media/video/cx25840/cx25840-ir.c
index be23c5b..34e284b 100644
--- a/drivers/media/video/cx25840/cx25840-ir.c
+++ b/drivers/media/video/cx25840/cx25840-ir.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/kfifo.h>
 #include <media/cx25840.h>
+#include <media/ir-core.h>
 
 #include "cx25840-core.h"
 
@@ -94,8 +95,18 @@ MODULE_PARM_DESC(ir_debug, "enable integrated IR debug messages");
 #define CX25840_VIDCLK_FREQ	108000000 /* 108 MHz, BT.656 */
 #define CX25840_IR_REFCLK_FREQ	(CX25840_VIDCLK_FREQ / 2)
 
-#define CX25840_IR_RX_KFIFO_SIZE	(512 * sizeof(u32))
-#define CX25840_IR_TX_KFIFO_SIZE	(512 * sizeof(u32))
+/*
+ * We use this union internally for convenience, but callers to tx_write
+ * and rx_read will be expecting records of type struct ir_raw_event.
+ * Always ensure the size of this union is dictated by struct ir_raw_event.
+ */
+union cx25840_ir_fifo_rec {
+	u32 hw_fifo_data;
+	struct ir_raw_event ir_core_data;
+};
+
+#define CX25840_IR_RX_KFIFO_SIZE    (256 * sizeof(union cx25840_ir_fifo_rec))
+#define CX25840_IR_TX_KFIFO_SIZE    (256 * sizeof(union cx25840_ir_fifo_rec))
 
 struct cx25840_ir_state {
 	struct i2c_client *c;
@@ -435,8 +446,8 @@ static u32 txclk_tx_s_max_pulse_width(struct i2c_client *c, u32 ns,
 {
 	u64 pulse_clocks;
 
-	if (ns > V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS)
-		ns = V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS;
+	if (ns > IR_MAX_DURATION)
+		ns = IR_MAX_DURATION;
 	pulse_clocks = ns_to_pulse_clocks(ns);
 	*divider = pulse_clocks_to_clock_divider(pulse_clocks);
 	cx25840_write4(c, CX25840_IR_TXCLK_REG, *divider);
@@ -448,8 +459,8 @@ static u32 rxclk_rx_s_max_pulse_width(struct i2c_client *c, u32 ns,
 {
 	u64 pulse_clocks;
 
-	if (ns > V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS)
-		ns = V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS;
+	if (ns > IR_MAX_DURATION)
+		ns = IR_MAX_DURATION;
 	pulse_clocks = ns_to_pulse_clocks(ns);
 	*divider = pulse_clocks_to_clock_divider(pulse_clocks);
 	cx25840_write4(c, CX25840_IR_RXCLK_REG, *divider);
@@ -516,8 +527,8 @@ int cx25840_ir_irq_handler(struct v4l2_subdev *sd, u32 status, bool *handled)
 	struct i2c_client *c = NULL;
 	unsigned long flags;
 
-	u32 rx_data[FIFO_RX_DEPTH];
-	int i, j, k;
+	union cx25840_ir_fifo_rec rx_data[FIFO_RX_DEPTH];
+	unsigned int i, j, k;
 	u32 events, v;
 	int tsr, rsr, rto, ror, tse, rse, rte, roe, kror;
 	u32 cntrl, irqen, stats;
@@ -594,11 +605,12 @@ int cx25840_ir_irq_handler(struct v4l2_subdev *sd, u32 status, bool *handled)
 			for (j = 0;
 			     (v & FIFO_RX_NDV) && j < FIFO_RX_DEPTH; j++) {
 				v = cx25840_read4(c, CX25840_IR_FIFO_REG);
-				rx_data[i++] = v & ~FIFO_RX_NDV;
+				rx_data[i].hw_fifo_data = v & ~FIFO_RX_NDV;
+				i++;
 			}
 			if (i == 0)
 				break;
-			j = i * sizeof(u32);
+			j = i * sizeof(union cx25840_ir_fifo_rec);
 			k = kfifo_in_locked(&ir_state->rx_kfifo,
 					    (unsigned char *) rx_data, j,
 					    &ir_state->rx_kfifo_lock);
@@ -655,8 +667,8 @@ static int cx25840_ir_rx_read(struct v4l2_subdev *sd, u8 *buf, size_t count,
 	bool invert;
 	u16 divider;
 	unsigned int i, n;
-	u32 *p;
-	u32 u, v;
+	union cx25840_ir_fifo_rec *p;
+	unsigned u, v;
 
 	if (ir_state == NULL)
 		return -ENODEV;
@@ -664,7 +676,8 @@ static int cx25840_ir_rx_read(struct v4l2_subdev *sd, u8 *buf, size_t count,
 	invert = (bool) atomic_read(&ir_state->rx_invert);
 	divider = (u16) atomic_read(&ir_state->rxclk_divider);
 
-	n = count / sizeof(u32) * sizeof(u32);
+	n = count / sizeof(union cx25840_ir_fifo_rec)
+		* sizeof(union cx25840_ir_fifo_rec);
 	if (n == 0) {
 		*num = 0;
 		return 0;
@@ -673,28 +686,28 @@ static int cx25840_ir_rx_read(struct v4l2_subdev *sd, u8 *buf, size_t count,
 	n = kfifo_out_locked(&ir_state->rx_kfifo, buf, n,
 			     &ir_state->rx_kfifo_lock);
 
-	n /= sizeof(u32);
-	*num = n * sizeof(u32);
+	n /= sizeof(union cx25840_ir_fifo_rec);
+	*num = n * sizeof(union cx25840_ir_fifo_rec);
 
-	for (p = (u32 *) buf, i = 0; i < n; p++, i++) {
+	for (p = (union cx25840_ir_fifo_rec *) buf, i = 0; i < n; p++, i++) {
 
-		if ((*p & FIFO_RXTX_RTO) == FIFO_RXTX_RTO) {
+		if ((p->hw_fifo_data & FIFO_RXTX_RTO) == FIFO_RXTX_RTO) {
 			/* Assume RTO was because of no IR light input */
 			u = 0;
 			v4l2_dbg(2, ir_debug, sd, "rx read: end of rx\n");
 		} else {
-			u = (*p & FIFO_RXTX_LVL)
-					  ? V4L2_SUBDEV_IR_PULSE_LEVEL_MASK : 0;
+			u = (p->hw_fifo_data & FIFO_RXTX_LVL) ? 1 : 0;
 			if (invert)
-				u = u ? 0 : V4L2_SUBDEV_IR_PULSE_LEVEL_MASK;
+				u = u ? 0 : 1;
 		}
 
-		v = (u32) pulse_width_count_to_ns((u16) (*p & FIFO_RXTX),
-						  divider);
-		if (v >= V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS)
-			v = V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS - 1;
+		v = (unsigned) pulse_width_count_to_ns(
+				  (u16) (p->hw_fifo_data & FIFO_RXTX), divider);
+		if (v > IR_MAX_DURATION)
+			v = IR_MAX_DURATION;
 
-		*p = u | v;
+		p->ir_core_data.pulse = u;
+		p->ir_core_data.duration = v;
 
 		v4l2_dbg(2, ir_debug, sd, "rx read: %10u ns  %s\n",
 			 v, u ? "mark" : "space");
@@ -769,7 +782,7 @@ static int cx25840_ir_rx_s_parameters(struct v4l2_subdev *sd,
 	p->mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
 	o->mode = p->mode;
 
-	p->bytes_per_data_element = sizeof(u32);
+	p->bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec);
 	o->bytes_per_data_element = p->bytes_per_data_element;
 
 	/* Before we tweak the hardware, we have to disable the receiver */
@@ -958,7 +971,7 @@ static int cx25840_ir_tx_s_parameters(struct v4l2_subdev *sd,
 	p->mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
 	o->mode = p->mode;
 
-	p->bytes_per_data_element = sizeof(u32);
+	p->bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec);
 	o->bytes_per_data_element = p->bytes_per_data_element;
 
 	/* Before we tweak the hardware, we have to disable the transmitter */
@@ -1172,7 +1185,7 @@ const struct v4l2_subdev_ir_ops cx25840_ir_ops = {
 
 
 static const struct v4l2_subdev_ir_parameters default_rx_params = {
-	.bytes_per_data_element = sizeof(u32),
+	.bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec),
 	.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH,
 
 	.enable = false,
@@ -1191,7 +1204,7 @@ static const struct v4l2_subdev_ir_parameters default_rx_params = {
 };
 
 static const struct v4l2_subdev_ir_parameters default_tx_params = {
-	.bytes_per_data_element = sizeof(u32),
+	.bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec),
 	.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH,
 
 	.enable = false,