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authorHans Verkuil <hansverk@cisco.com>2017-10-13 18:01:32 +0200
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2017-10-27 14:02:19 +0200
commit5bf24e08b685d862f1249987a6d3423b42989622 (patch)
tree22d587cd559685bf813da61873cc38e7716fe701 /drivers/media/cec
parente69b987a97599456b95b5fef4aca8dcdb1505aea (diff)
downloadlinux-5bf24e08b685d862f1249987a6d3423b42989622.tar.bz2
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>
Diffstat (limited to 'drivers/media/cec')
-rw-r--r--drivers/media/cec/cec-api.c1
-rw-r--r--drivers/media/cec/cec-pin-priv.h133
-rw-r--r--drivers/media/cec/cec-pin.c1
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 */