media: cec-pin.h: move non-kAPI parts into cec-pin-priv.h

The kAPI cec-pin.h header also defined data structures that did
not belong here but were private to the CEC core code.

Split that part off into a cec-pin-priv.h header.

Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

3 files changed, 135 insertions, 0 deletions

diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c
index 465bb3ec21f6..3dba3aa34a43 100644
--- a/drivers/media/cec/cec-api.c
+++ b/drivers/media/cec/cec-api.c
@@ -32,6 +32,7 @@
 
 #include <media/cec-pin.h>
 #include "cec-priv.h"
+#include "cec-pin-priv.h"
 
 static inline struct cec_devnode *cec_devnode_data(struct file *filp)
 {
diff --git a/drivers/media/cec/cec-pin-priv.h b/drivers/media/cec/cec-pin-priv.h
new file mode 100644
index 000000000000..7d0def199762
--- /dev/null
+++ b/drivers/media/cec/cec-pin-priv.h
@@ -0,0 +1,133 @@
+/*
+ * cec-pin-priv.h - internal cec-pin header
+ *
+ * Copyright 2017 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef LINUX_CEC_PIN_PRIV_H
+#define LINUX_CEC_PIN_PRIV_H
+
+#include <linux/types.h>
+#include <linux/atomic.h>
+#include <media/cec-pin.h>
+
+enum cec_pin_state {
+	/* CEC is off */
+	CEC_ST_OFF,
+	/* CEC is idle, waiting for Rx or Tx */
+	CEC_ST_IDLE,
+
+	/* Tx states */
+
+	/* Pending Tx, waiting for Signal Free Time to expire */
+	CEC_ST_TX_WAIT,
+	/* Low-drive was detected, wait for bus to go high */
+	CEC_ST_TX_WAIT_FOR_HIGH,
+	/* Drive CEC low for the start bit */
+	CEC_ST_TX_START_BIT_LOW,
+	/* Drive CEC high for the start bit */
+	CEC_ST_TX_START_BIT_HIGH,
+	/* Drive CEC low for the 0 bit */
+	CEC_ST_TX_DATA_BIT_0_LOW,
+	/* Drive CEC high for the 0 bit */
+	CEC_ST_TX_DATA_BIT_0_HIGH,
+	/* Drive CEC low for the 1 bit */
+	CEC_ST_TX_DATA_BIT_1_LOW,
+	/* Drive CEC high for the 1 bit */
+	CEC_ST_TX_DATA_BIT_1_HIGH,
+	/*
+	 * Wait for start of sample time to check for Ack bit or first
+	 * four initiator bits to check for Arbitration Lost.
+	 */
+	CEC_ST_TX_DATA_BIT_1_HIGH_PRE_SAMPLE,
+	/* Wait for end of bit period after sampling */
+	CEC_ST_TX_DATA_BIT_1_HIGH_POST_SAMPLE,
+
+	/* Rx states */
+
+	/* Start bit low detected */
+	CEC_ST_RX_START_BIT_LOW,
+	/* Start bit high detected */
+	CEC_ST_RX_START_BIT_HIGH,
+	/* Wait for bit sample time */
+	CEC_ST_RX_DATA_SAMPLE,
+	/* Wait for earliest end of bit period after sampling */
+	CEC_ST_RX_DATA_POST_SAMPLE,
+	/* Wait for CEC to go high (i.e. end of bit period */
+	CEC_ST_RX_DATA_HIGH,
+	/* Drive CEC low to send 0 Ack bit */
+	CEC_ST_RX_ACK_LOW,
+	/* End of 0 Ack time, wait for earliest end of bit period */
+	CEC_ST_RX_ACK_LOW_POST,
+	/* Wait for CEC to go high (i.e. end of bit period */
+	CEC_ST_RX_ACK_HIGH_POST,
+	/* Wait for earliest end of bit period and end of message */
+	CEC_ST_RX_ACK_FINISH,
+
+	/* Start low drive */
+	CEC_ST_LOW_DRIVE,
+	/* Monitor pin using interrupts */
+	CEC_ST_RX_IRQ,
+
+	/* Total number of pin states */
+	CEC_PIN_STATES
+};
+
+#define CEC_NUM_PIN_EVENTS 128
+
+#define CEC_PIN_IRQ_UNCHANGED	0
+#define CEC_PIN_IRQ_DISABLE	1
+#define CEC_PIN_IRQ_ENABLE	2
+
+struct cec_pin {
+	struct cec_adapter		*adap;
+	const struct cec_pin_ops	*ops;
+	struct task_struct		*kthread;
+	wait_queue_head_t		kthread_waitq;
+	struct hrtimer			timer;
+	ktime_t				ts;
+	unsigned int			wait_usecs;
+	u16				la_mask;
+	bool				enabled;
+	bool				monitor_all;
+	bool				rx_eom;
+	bool				enable_irq_failed;
+	enum cec_pin_state		state;
+	struct cec_msg			tx_msg;
+	u32				tx_bit;
+	bool				tx_nacked;
+	u32				tx_signal_free_time;
+	struct cec_msg			rx_msg;
+	u32				rx_bit;
+
+	struct cec_msg			work_rx_msg;
+	u8				work_tx_status;
+	ktime_t				work_tx_ts;
+	atomic_t			work_irq_change;
+	atomic_t			work_pin_events;
+	unsigned int			work_pin_events_wr;
+	unsigned int			work_pin_events_rd;
+	ktime_t				work_pin_ts[CEC_NUM_PIN_EVENTS];
+	bool				work_pin_is_high[CEC_NUM_PIN_EVENTS];
+	ktime_t				timer_ts;
+	u32				timer_cnt;
+	u32				timer_100ms_overruns;
+	u32				timer_300ms_overruns;
+	u32				timer_max_overrun;
+	u32				timer_sum_overrun;
+};
+
+#endif
diff --git a/drivers/media/cec/cec-pin.c b/drivers/media/cec/cec-pin.c
index e2aa5d6e619d..a4c881dc81c4 100644
--- a/drivers/media/cec/cec-pin.c
+++ b/drivers/media/cec/cec-pin.c
@@ -20,6 +20,7 @@
 #include <linux/sched/types.h>
 
 #include <media/cec-pin.h>
+#include "cec-pin-priv.h"
 
 /* All timings are in microseconds */