160 lines
4.8 KiB
C
160 lines
4.8 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2009 by Jens Arnold
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* Copyright (C) 2011 by Thomas Martitz
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*
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* Rockbox simulator specific tasks
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "config.h"
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#include "kernel.h"
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#include "screendump.h"
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#include "thread.h"
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#include "debug.h"
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#include "usb.h"
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static void sim_thread(void);
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static long sim_thread_stack[DEFAULT_STACK_SIZE/sizeof(long)];
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/* stack isn't actually used in the sim */
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static const char sim_thread_name[] = "sim";
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static struct event_queue sim_queue;
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/* possible events for the sim thread */
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enum {
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SIM_SCREENDUMP,
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SIM_USB_INSERTED,
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SIM_USB_EXTRACTED,
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};
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void sim_thread(void)
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{
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struct queue_event ev;
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long last_broadcast_tick = current_tick;
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int num_acks_to_expect = 0;
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while (1)
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{
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queue_wait(&sim_queue, &ev);
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switch(ev.id)
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{
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case SIM_SCREENDUMP:
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screen_dump();
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#ifdef HAVE_REMOTE_LCD
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remote_screen_dump();
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#endif
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break;
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case SIM_USB_INSERTED:
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/* from firmware/usb.c: */
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/* Tell all threads that they have to back off the storage.
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We subtract one for our own thread. Expect an ACK for every
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listener for each broadcast they received. If it has been too
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long, the user might have entered a screen that didn't ACK
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when inserting the cable, such as a debugging screen. In that
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case, reset the count or else USB would be locked out until
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rebooting because it most likely won't ever come. Simply
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resetting to the most recent broadcast count is racy. */
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if(TIME_AFTER(current_tick, last_broadcast_tick + HZ*5))
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{
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num_acks_to_expect = 0;
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last_broadcast_tick = current_tick;
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}
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num_acks_to_expect += queue_broadcast(SYS_USB_CONNECTED, 0) - 1;
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DEBUGF("USB inserted. Waiting for %d acks...\n",
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num_acks_to_expect);
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break;
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case SYS_USB_CONNECTED_ACK:
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if(num_acks_to_expect > 0 && --num_acks_to_expect == 0)
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{
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DEBUGF("All threads have acknowledged the connect.\n");
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}
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else
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{
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DEBUGF("usb: got ack, %d to go...\n",
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num_acks_to_expect);
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}
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break;
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case SIM_USB_EXTRACTED:
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/* in usb.c, this is only done for exclusive storage
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* do it here anyway but don't depend on the acks */
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queue_broadcast(SYS_USB_DISCONNECTED, 0);
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break;
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default:
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DEBUGF("sim_tasks: unhandled event: %ld\n", ev.id);
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break;
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}
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}
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}
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void sim_tasks_init(void)
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{
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queue_init(&sim_queue, false);
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create_thread(sim_thread, sim_thread_stack, sizeof(sim_thread_stack), 0,
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sim_thread_name IF_PRIO(,PRIORITY_BACKGROUND) IF_COP(,CPU));
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}
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void sim_trigger_screendump(void)
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{
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queue_post(&sim_queue, SIM_SCREENDUMP, 0);
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}
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static bool is_usb_inserted;
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void sim_trigger_usb(bool inserted)
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{
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if (inserted)
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queue_post(&sim_queue, SIM_USB_INSERTED, 0);
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else
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queue_post(&sim_queue, SIM_USB_EXTRACTED, 0);
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is_usb_inserted = inserted;
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}
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int usb_detect(void)
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{
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return is_usb_inserted ? USB_INSERTED : USB_EXTRACTED;
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}
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void usb_init(void)
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{
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}
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void usb_start_monitoring(void)
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{
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}
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void usb_acknowledge(long id)
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{
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queue_post(&sim_queue, id, 0);
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}
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void usb_wait_for_disconnect(struct event_queue *q)
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{
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#ifdef USB_FULL_INIT
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struct queue_event ev;
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/* Don't return until we get SYS_USB_DISCONNECTED */
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while(1)
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{
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queue_wait(q, &ev);
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if(ev.id == SYS_USB_DISCONNECTED)
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return;
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}
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#endif /* USB_FULL_INIT */
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(void)q;
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}
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