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IAP: Reset IAP state upon headphone or dock unplug

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Provides a semi-automatic way of recovering from desynchronization

Change-Id: I527b0bacc22ef38c1e7213653e522ea1b0ac155d
This commit is contained in:
Solomon Peachy 2025-08-06 14:26:34 -04:00
parent 80eca90481
commit 472a6a69c6
5 changed files with 93 additions and 15 deletions
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11
firmware/drivers/button.c
View file

@ -45,6 +45,10 @@
#include "lcd.h" /* lcd_active() prototype */
#endif
#if defined(IPOD_ACCESSORY_PROTOCOL) && (defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IPOD_MINI2G))
#include "iap.h"
#endif
static long lastbtn; /* Last valid button status */
static long last_read; /* Last button status, for debouncing/filtering */
static bool flipped; /* buttons can be flipped to match the LCD flip */
@ -102,6 +106,12 @@ static int hp_detect_callback(struct timeout *tmo)
/* Try to post only transistions */
const long id = tmo->data ? SYS_PHONE_PLUGGED : SYS_PHONE_UNPLUGGED;
button_queue_post_remove_head(id, 0);
#if defined(IPOD_ACCESSORY_PROTOCOL) && (defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IPOD_MINI2G))
if (id == SYS_PHONE_UNPLUGGED)
iap_reset_state(1);
#endif
return 0;
/*misc.c:hp_unplug_change*/
}
@ -113,6 +123,7 @@ static int lo_detect_callback(struct timeout *tmo)
/* Try to post only transistions */
const long id = tmo->data ? SYS_LINEOUT_PLUGGED : SYS_LINEOUT_UNPLUGGED;
button_queue_post_remove_head(id, 0);
return 0;
/*misc.c:lo_unplug_change*/
}

3
firmware/export/iap.h
View file

@ -37,5 +37,6 @@ const unsigned char *iap_get_serbuf(void);
#ifdef HAVE_LINE_REC
extern bool iap_record(bool onoff);
#endif
void iap_reset_state(int port); /* 0 is dock, 1 is headphone */
bool dbg_iap(void);
#endif

8
firmware/usb.c
View file

@ -51,6 +51,10 @@
#include "gui/skin_engine/skin_engine.h"
#endif
#if defined(IPOD_ACCESSORY_PROTOCOL)
#include "iap.h"
#endif
/* Conditions under which we want the entire driver */
#if !defined(BOOTLOADER) || \
(defined(HAVE_USBSTACK) && defined(HAVE_BOOTLOADER_USB_MODE)) || \
@ -521,6 +525,10 @@ static void NORETURN_ATTR usb_thread(void)
if(usb_state == USB_POWERED || usb_state == USB_INSERTED)
usb_stack_enable(false);
#ifdef IPOD_ACCESSORY_PROTOCOL
iap_reset_state(0);
#endif
/* Only disable the USB slave mode if we really have enabled
it. Some expected acks may not have been received. */
if(usb_state == USB_INSERTED)