hosted: Consolidate common /dev/input code shared by the hiby targets

 * Enable dynamic number of input devices, needed for bluetooth support

Change-Id: Ic2425834eb9b0fff298899ab45f3115ce1d95e91

9 files changed, 144 insertions, 274 deletions

diff --git a/firmware/SOURCES b/firmware/SOURCES
index 7f08e4870f..11929d8253 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -145,6 +145,7 @@ target/hosted/xduoo/powermgmt-xduoo.c
 
 #if defined(HIBY_LINUX) && !defined(SIMULATOR)
 target/hosted/usb-hiby.c
+target/hosted/button-devinput.c
 #endif
 
 #if (defined(FIIO_M3K)) && !defined(SIMULATOR)
diff --git a/firmware/target/hosted/agptek/button-agptek.c b/firmware/target/hosted/agptek/button-agptek.c
index 2c84a50405..8fc676acec 100644
--- a/firmware/target/hosted/agptek/button-agptek.c
+++ b/firmware/target/hosted/agptek/button-agptek.c
@@ -17,25 +17,13 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-#include <poll.h>
-//#include <dir.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
 #include <linux/input.h>
-#include <fcntl.h>
-#include <string.h>
-#include <stdlib.h>
 
 #include "sysfs.h"
 #include "button.h"
 #include "button-target.h"
-#include "panic.h"
 
-#define NR_POLL_DESC    2
-static struct pollfd poll_fds[NR_POLL_DESC];
-
-static int button_map(int keycode)
+int button_map(int keycode)
 {
     switch(keycode)
     {
@@ -68,67 +56,6 @@ static int button_map(int keycode)
     }
 }
 
-void button_init_device(void)
-{
-    const char * const input_devs[NR_POLL_DESC] = {
-        "/dev/input/event0",
-        "/dev/input/event1"
-    };
-
-    for(int i = 0; i < NR_POLL_DESC; i++)
-    {
-        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
-
-        if(fd < 0)
-        {
-            panicf("Cannot open input device: %s\n", input_devs[i]);
-        }
-
-        poll_fds[i].fd = fd;
-        poll_fds[i].events = POLLIN;
-        poll_fds[i].revents = 0;
-    }
-}
-
-int button_read_device(void)
-{
-    static int button_bitmap = 0;
-    struct input_event event;
-
-    /* check if there are any events pending and process them */
-    while(poll(poll_fds, NR_POLL_DESC, 0))
-    {
-        for(int i = 0; i < NR_POLL_DESC; i++)
-        {
-            /* read only if non-blocking */
-            if(poll_fds[i].revents & POLLIN)
-            {
-                int size = read(poll_fds[i].fd, &event, sizeof(event));
-                if(size == (int)sizeof(event))
-                {
-                    int keycode = event.code;
-                    /* event.value == 0x10000 means press
-                     * event.value == 0 means release
-                     */
-                    bool press = event.value ? true : false;
-
-                    /* map linux event code to rockbox button bitmap */
-                    if(press)
-                    {
-                        button_bitmap |= button_map(keycode);
-                    }
-                    else
-                    {
-                        button_bitmap &= ~button_map(keycode);
-                    }
-                }
-            }
-        }
-    }
-
-    return button_bitmap;
-}
-
 bool headphones_inserted(void)
 {
     int status = 0;
@@ -137,12 +64,3 @@ bool headphones_inserted(void)
 
     return status ? true : false;
 }
-
-void button_close_device(void)
-{
-    /* close descriptors */
-    for(int i = 0; i < NR_POLL_DESC; i++)
-    {
-        close(poll_fds[i].fd);
-    }
-}
diff --git a/firmware/target/hosted/agptek/button-target.h b/firmware/target/hosted/agptek/button-target.h
index e13891a554..66a29f60f7 100644
--- a/firmware/target/hosted/agptek/button-target.h
+++ b/firmware/target/hosted/agptek/button-target.h
@@ -39,5 +39,7 @@
 #define POWEROFF_BUTTON BUTTON_POWER
 #define POWEROFF_COUNT 25
 
+int button_map(int keycode);
+
 #endif /* _BUTTON_TARGET_H_ */
 
diff --git a/firmware/target/hosted/aigo/button-erosq.c b/firmware/target/hosted/aigo/button-erosq.c
index db7f7e24e5..1336442370 100644
--- a/firmware/target/hosted/aigo/button-erosq.c
+++ b/firmware/target/hosted/aigo/button-erosq.c
@@ -6,7 +6,6 @@
  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
  *                     \/            \/     \/    \/            \/
  *
- * Copyright (C) 2017 Marcin Bukat
  * Copyright (C) 2020 Solomon Peachy
  *
  * This program is free software; you can redistribute it and/or
@@ -18,30 +17,20 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-#include <poll.h>
-//#include <dir.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
 #include <linux/input.h>
-#include <fcntl.h>
-#include <string.h>
-#include <stdlib.h>
 
-#include "sysfs.h"
 #include "button.h"
 #include "button-target.h"
-#include "panic.h"
 
 #include "kernel.h"
-#include "backlight.h"
-#include "backlight-target.h"
 #include "erosqlinux_codec.h"
 
-#define NR_POLL_DESC    2
-static struct pollfd poll_fds[NR_POLL_DESC];
+/*
+   /dev/input/event0: rotary encoder
+   /dev/input/event1: all keys
+*/
 
-static int button_map(int keycode)
+int button_map(int keycode)
 {
     switch(keycode)
     {
@@ -80,82 +69,6 @@ static int button_map(int keycode)
     }
 }
 
-void button_init_device(void)
-{
-    const char * const input_devs[NR_POLL_DESC] = {
-        "/dev/input/event0", // Rotary encoder
-        "/dev/input/event1"  // Keys
-    };
-
-    for(int i = 0; i < NR_POLL_DESC; i++)
-    {
-        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
-
-        if(fd < 0)
-        {
-            panicf("Cannot open input device: %s (%d)\n", input_devs[i], errno);
-        }
-
-        poll_fds[i].fd = fd;
-        poll_fds[i].events = POLLIN;
-        poll_fds[i].revents = 0;
-    }
-}
-
-int button_read_device(void)
-{
-    static int button_bitmap = 0;
-    struct input_event event;
-
-    // FIXME TODO:  Make this work via HAVE_SCROLL_WHEEL instead
-
-    /* Wheel gives us press+release back to back, clear them after time elapses */
-    static long last_tick = 0;
-    if (button_bitmap & (BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD) &&
-        current_tick - last_tick >= 2)
-    {
-        button_bitmap &= ~(BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD);
-    }
-
-    /* check if there are any events pending and process them */
-    while(poll(poll_fds, NR_POLL_DESC, 0))
-    {
-        for(int i = 0; i < NR_POLL_DESC; i++)
-        {
-            /* read only if non-blocking */
-            if(poll_fds[i].revents & POLLIN)
-            {
-                int size = read(poll_fds[i].fd, &event, sizeof(event));
-                if(size == (int)sizeof(event))
-                {
-                    int keycode = event.code;
-                    /* event.value == 1 means press
-                     * event.value == 0 means release
-                     */
-                    bool press = event.value ? true : false;
-
-                    /* map linux event code to rockbox button bitmap */
-                    if(press)
-                    {
-                        int bmap = button_map(keycode);
-                        if (bmap & (BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD))
-                            last_tick = current_tick;
-                        button_bitmap |= bmap;
-                    }
-                    else
-                    {
-                        /* Wheel gives us press+release back to back; ignore the release */
-                        int bmap = button_map(keycode) & ~(BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD);
-                        button_bitmap &= ~bmap;
-                    }
-                }
-            }
-        }
-    }
-
-    return button_bitmap;
-}
-
 bool headphones_inserted(void)
 {
 #ifdef BOOTLOADER
@@ -177,12 +90,3 @@ bool lineout_inserted(void)
 
     return (ps == 1);
 }
-
-void button_close_device(void)
-{
-    /* close descriptors */
-    for(int i = 0; i < NR_POLL_DESC; i++)
-    {
-        close(poll_fds[i].fd);
-    }
-}
diff --git a/firmware/target/hosted/aigo/button-target.h b/firmware/target/hosted/aigo/button-target.h
index f59f491d2f..44bd914778 100644
--- a/firmware/target/hosted/aigo/button-target.h
+++ b/firmware/target/hosted/aigo/button-target.h
@@ -42,4 +42,6 @@
 #define POWEROFF_BUTTON BUTTON_POWER
 #define POWEROFF_COUNT  25
 
+int button_map(int keycode);
+
 #endif /* _BUTTON_TARGET_H_ */
diff --git a/firmware/target/hosted/button-devinput.c b/firmware/target/hosted/button-devinput.c
new file mode 100644
index 0000000000..8c469b8308
--- /dev/null
+++ b/firmware/target/hosted/button-devinput.c
@@ -0,0 +1,130 @@
+/***************************************************************************
+ *             __________               __   ___
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ *
+ * Copyright (C) 2017 Marcin Bukat
+ * Copyright (C) 2020 Solomon Peachy
+
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <poll.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <linux/input.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "kernel.h"
+#include "sysfs.h"
+#include "button.h"
+#include "panic.h"
+
+#define NR_POLL_DESC    4
+
+static int num_devices = 0;
+static struct pollfd poll_fds[NR_POLL_DESC];
+
+void button_init_device(void)
+{
+    const char * const input_devs[NR_POLL_DESC] = {
+        "/dev/input/event0",
+        "/dev/input/event1",
+        "/dev/input/event2",
+        "/dev/input/event3",
+    };
+
+    for(int i = 0; i < NR_POLL_DESC; i++)
+    {
+        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
+
+        if(fd >= 0)
+        {
+            poll_fds[num_devices].fd = fd;
+            poll_fds[num_devices].events = POLLIN;
+            poll_fds[num_devices].revents = 0;
+            num_devices++;
+        }
+    }
+}
+
+void button_close_device(void)
+{
+    /* close descriptors */
+    for(int i = 0; i < num_devices; i++)
+    {
+        close(poll_fds[i].fd);
+    }
+    num_devices = 0;
+}
+
+int button_read_device(void)
+{
+    static int button_bitmap = 0;
+    struct input_event event;
+
+#if defined(BUTTON_SCROLL_BACK)
+    // FIXME TODO:  Make this work via HAVE_SCROLL_WHEEL instead
+
+    /* Wheel gives us press+release back to back, clear them after time elapses */
+    static long last_tick = 0;
+    if (button_bitmap & (BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD) &&
+        current_tick - last_tick >= 2)
+    {
+        button_bitmap &= ~(BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD);
+    }
+#endif
+
+    /* check if there are any events pending and process them */
+    while(poll(poll_fds, num_devices, 0))
+    {
+        for(int i = 0; i < num_devices; i++)
+        {
+            /* read only if non-blocking */
+            if(poll_fds[i].revents & POLLIN)
+            {
+                int size = read(poll_fds[i].fd, &event, sizeof(event));
+                if(size == (int)sizeof(event))
+                {
+                    int keycode = event.code;
+                    /* event.value == 0x10000 means press
+                     * event.value == 0 means release
+                     */
+                    bool press = event.value ? true : false;
+
+                    /* map linux event code to rockbox button bitmap */
+                    if(press)
+                    {
+                        button_bitmap |= button_map(keycode);
+                    }
+                    else
+                    {
+#if defined(BUTTON_SCROLL_BACK)
+                        /* Wheel gives us press+release back to back; ignore the release */
+                        int bmap = button_map(keycode) & ~(BUTTON_SCROLL_BACK|BUTTON_SCROLL_FWD);
+                        button_bitmap &= ~bmap;
+#else
+                        button_bitmap &= ~button_map(keycode);
+#endif
+                    }
+                }
+            }
+        }
+    }
+
+    return button_bitmap;
+}
diff --git a/firmware/target/hosted/fiio/button-fiio.c b/firmware/target/hosted/fiio/button-fiio.c
index 134ec5a426..4acbfb0ea7 100644
--- a/firmware/target/hosted/fiio/button-fiio.c
+++ b/firmware/target/hosted/fiio/button-fiio.c
@@ -19,7 +19,6 @@
  *
  ****************************************************************************/
 #include <poll.h>
-//#include <dir.h>
 #include <errno.h>
 #include <unistd.h>
 #include <sys/types.h>
@@ -34,8 +33,6 @@
 #include "panic.h"
 
 #include "kernel.h"
-#include "backlight.h"
-#include "backlight-target.h"
 
 static int key_enter_delay = 0;
 static int key_right_delay = 0;
diff --git a/firmware/target/hosted/xduoo/button-target.h b/firmware/target/hosted/xduoo/button-target.h
index 3240d3df8e..20bae1c6f6 100644
--- a/firmware/target/hosted/xduoo/button-target.h
+++ b/firmware/target/hosted/xduoo/button-target.h
@@ -40,4 +40,6 @@
 #define POWEROFF_BUTTON BUTTON_POWER
 #define POWEROFF_COUNT  25
 
+int button_map(int keycode);
+
 #endif /* _BUTTON_TARGET_H_ */
diff --git a/firmware/target/hosted/xduoo/button-xduoo.c b/firmware/target/hosted/xduoo/button-xduoo.c
index 67cb9a6c46..f5b6c6be62 100644
--- a/firmware/target/hosted/xduoo/button-xduoo.c
+++ b/firmware/target/hosted/xduoo/button-xduoo.c
@@ -18,30 +18,15 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-#include <poll.h>
-//#include <dir.h>
-#include <errno.h>
-#include <unistd.h>
-#include <sys/types.h>
 #include <linux/input.h>
-#include <fcntl.h>
-#include <string.h>
-#include <stdlib.h>
 
-#include "sysfs.h"
 #include "button.h"
 #include "button-target.h"
-#include "panic.h"
 
 #include "kernel.h"
-#include "backlight.h"
-#include "backlight-target.h"
 #include "xduoolinux_codec.h"
 
-#define NR_POLL_DESC    3
-static struct pollfd poll_fds[NR_POLL_DESC];
-
-static int button_map(int keycode)
+int button_map(int keycode)
 {
     switch(keycode)
     {
@@ -74,68 +59,6 @@ static int button_map(int keycode)
     }
 }
 
-void button_init_device(void)
-{
-    const char * const input_devs[NR_POLL_DESC] = {
-        "/dev/input/event0",
-        "/dev/input/event1",
-        "/dev/input/event2"
-    };
-
-    for(int i = 0; i < NR_POLL_DESC; i++)
-    {
-        int fd = open(input_devs[i], O_RDONLY | O_CLOEXEC);
-
-        if(fd < 0)
-        {
-            panicf("Cannot open input device: %s\n", input_devs[i]);
-        }
-
-        poll_fds[i].fd = fd;
-        poll_fds[i].events = POLLIN;
-        poll_fds[i].revents = 0;
-    }
-}
-
-int button_read_device(void)
-{
-    static int button_bitmap = 0;
-    struct input_event event;
-
-    /* check if there are any events pending and process them */
-    while(poll(poll_fds, NR_POLL_DESC, 0))
-    {
-        for(int i = 0; i < NR_POLL_DESC; i++)
-        {
-            /* read only if non-blocking */
-            if(poll_fds[i].revents & POLLIN)
-            {
-                int size = read(poll_fds[i].fd, &event, sizeof(event));
-                if(size == (int)sizeof(event))
-                {
-                    int keycode = event.code;
-                    /* event.value == 1 means press
-                     * event.value == 0 means release
-                     */
-                    bool press = event.value ? true : false;
-
-                    /* map linux event code to rockbox button bitmap */
-                    if(press)
-                    {
-                        button_bitmap |= button_map(keycode);
-                    }
-                    else
-                    {
-                        button_bitmap &= ~button_map(keycode);
-                    }
-                }
-            }
-        }
-    }
-
-    return button_bitmap;
-}
-
 bool headphones_inserted(void)
 {
 #ifdef BOOTLOADER
@@ -156,12 +79,3 @@ bool lineout_inserted(void)
 #endif
     return (ps == 1);
 }
-
-void button_close_device(void)
-{
-    /* close descriptors */
-    for(int i = 0; i < NR_POLL_DESC; i++)
-    {
-        close(poll_fds[i].fd);
-    }
-}