/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2002 by Linus Nielsen Feltzing * * iPod driver based on code from the ipodlinux project - http://ipodlinux.org * Adapted for Rockbox in January 2006 * Original file: podzilla/usb.c * Copyright (C) 2005 Adam Johnston * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "config.h" #include "cpu.h" #include "kernel.h" #include "thread.h" #include "system.h" #include "debug.h" #include "ata.h" #include "fat.h" #include "disk.h" #include "panic.h" #include "lcd.h" #include "usb.h" #include "button.h" #include "sprintf.h" #include "string.h" #include "usb-target.h" #ifdef IRIVER_H300_SERIES #include "pcf50606.h" /* for pcf50606_usb_charging_... */ #endif #include "logf.h" extern void dbg_ports(void); /* NASTY! defined in apps/ */ #ifdef HAVE_LCD_BITMAP bool do_screendump_instead_of_usb = false; void screen_dump(void); /* Nasty again. Defined in apps/ too */ #endif #if !defined(SIMULATOR) && !defined(USB_NONE) #define NUM_POLL_READINGS (HZ/5) static int countdown; static int usb_state; #if defined(HAVE_MMC) && !defined(BOOTLOADER) static int usb_mmc_countdown = 0; #endif /* FIXME: The extra 0x800 is consumed by fat_mount() when the fsinfo needs updating */ #ifndef BOOTLOADER static long usb_stack[(DEFAULT_STACK_SIZE + 0x800)/sizeof(long)]; static const char usb_thread_name[] = "usb"; #endif static struct event_queue usb_queue; static int last_usb_status; static bool usb_monitor_enabled; #ifndef BOOTLOADER static void usb_slave_mode(bool on) { int rc; if(on) { DEBUGF("Entering USB slave mode\n"); ata_soft_reset(); ata_init(); ata_enable(false); usb_enable(true); } else { DEBUGF("Leaving USB slave mode\n"); /* Let the ISDx00 settle */ sleep(HZ*1); usb_enable(false); rc = ata_init(); if(rc) { /* fixme: can we remove this? (already such in main.c) */ char str[32]; lcd_clear_display(); snprintf(str, 31, "ATA error: %d", rc); lcd_puts(0, 0, str); lcd_puts(0, 1, "Press ON to debug"); lcd_update(); while(!(button_get(true) & BUTTON_REL)) {}; dbg_ports(); panicf("ata: %d",rc); } rc = disk_mount_all(); if (rc <= 0) /* no partition */ panicf("mount: %d",rc); } } static void usb_thread(void) { int num_acks_to_expect = -1; bool waiting_for_ack; struct event ev; waiting_for_ack = false; while(1) { queue_wait(&usb_queue, &ev); switch(ev.id) { #ifdef HAVE_USB_POWER case USB_POWERED: usb_state = USB_POWERED; break; #endif case USB_INSERTED: #ifdef HAVE_LCD_BITMAP if(do_screendump_instead_of_usb) { screen_dump(); } else #endif #ifdef HAVE_USB_POWER if((button_status() & ~USBPOWER_BTN_IGNORE) == USBPOWER_BUTTON) { usb_state = USB_POWERED; } else #endif { /* Tell all threads that they have to back off the ATA. We subtract one for our own thread. */ num_acks_to_expect = queue_broadcast(SYS_USB_CONNECTED, 0) - 1; waiting_for_ack = true; DEBUGF("USB inserted. Waiting for ack from %d threads...\n", num_acks_to_expect); } break; case SYS_USB_CONNECTED_ACK: if(waiting_for_ack) { num_acks_to_expect--; if(num_acks_to_expect == 0) { DEBUGF("All threads have acknowledged the connect.\n"); usb_slave_mode(true); usb_state = USB_INSERTED; cpu_idle_mode(true); } else { DEBUGF("usb: got ack, %d to go...\n", num_acks_to_expect); } } break; case USB_EXTRACTED: #ifdef HAVE_LCD_BITMAP if(do_screendump_instead_of_usb) break; #endif #ifdef HAVE_USB_POWER if(usb_state == USB_POWERED) { usb_state = USB_EXTRACTED; break; } #endif if(usb_state == USB_INSERTED) { /* Only disable the USB mode if we really have enabled it some threads might not have acknowledged the insertion */ usb_slave_mode(false); cpu_idle_mode(false); } usb_state = USB_EXTRACTED; /* Tell all threads that we are back in business */ num_acks_to_expect = queue_broadcast(SYS_USB_DISCONNECTED, 0) - 1; waiting_for_ack = true; DEBUGF("USB extracted. Waiting for ack from %d threads...\n", num_acks_to_expect); break; case SYS_USB_DISCONNECTED_ACK: if(waiting_for_ack) { num_acks_to_expect--; if(num_acks_to_expect == 0) { DEBUGF("All threads have acknowledged. " "We're in business.\n"); } else { DEBUGF("usb: got ack, %d to go...\n", num_acks_to_expect); } } break; #ifdef HAVE_MMC case SYS_HOTSWAP_INSERTED: case SYS_HOTSWAP_EXTRACTED: if(usb_state == USB_INSERTED) { usb_enable(false); usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */ } break; case USB_REENABLE: if(usb_state == USB_INSERTED) usb_enable(true); /* reenable only if still inserted */ break; #endif } } } #endif #ifndef BOOTLOADER static void usb_tick(void) { int current_status; if(usb_monitor_enabled) { current_status = usb_detect(); /* Only report when the status has changed */ if(current_status != last_usb_status) { last_usb_status = current_status; countdown = NUM_POLL_READINGS; } else { /* Count down until it gets negative */ if(countdown >= 0) countdown--; /* Report to the thread if we have had 3 identical status readings in a row */ if(countdown == 0) { queue_post(&usb_queue, current_status, 0); } } } #ifdef HAVE_MMC if(usb_mmc_countdown > 0) { usb_mmc_countdown--; if (usb_mmc_countdown == 0) queue_post(&usb_queue, USB_REENABLE, 0); } #endif } #endif void usb_acknowledge(long id) { queue_post(&usb_queue, id, 0); } void usb_init(void) { usb_state = USB_EXTRACTED; usb_monitor_enabled = false; countdown = -1; usb_init_device(); usb_enable(false); /* We assume that the USB cable is extracted */ last_usb_status = false; #ifndef BOOTLOADER queue_init(&usb_queue, true); queue_set_irq_safe(&usb_queue, true); create_thread(usb_thread, usb_stack, sizeof(usb_stack), usb_thread_name IF_PRIO(, PRIORITY_SYSTEM) IF_COP(, CPU, false)); tick_add_task(usb_tick); #endif } void usb_wait_for_disconnect(struct event_queue *q) { struct event ev; /* Don't return until we get SYS_USB_DISCONNECTED */ while(1) { queue_wait(q, &ev); if(ev.id == SYS_USB_DISCONNECTED) { usb_acknowledge(SYS_USB_DISCONNECTED_ACK); return; } } } int usb_wait_for_disconnect_w_tmo(struct event_queue *q, int ticks) { struct event ev; /* Don't return until we get SYS_USB_DISCONNECTED or SYS_TIMEOUT */ while(1) { queue_wait_w_tmo(q, &ev, ticks); switch(ev.id) { case SYS_USB_DISCONNECTED: usb_acknowledge(SYS_USB_DISCONNECTED_ACK); return 0; break; case SYS_TIMEOUT: return 1; break; } } } void usb_start_monitoring(void) { usb_monitor_enabled = true; } bool usb_inserted(void) { #ifdef HAVE_USB_POWER return usb_state == USB_INSERTED || usb_state == USB_POWERED; #else return usb_state == USB_INSERTED; #endif } #ifdef HAVE_USB_POWER bool usb_powered(void) { return usb_state == USB_POWERED; } #if CONFIG_CHARGING bool usb_charging_enable(bool on) { bool rc = false; #ifdef IRIVER_H300_SERIES int irqlevel; logf("usb_charging_enable(%s)\n", on ? "on" : "off" ); irqlevel = set_irq_level(HIGHEST_IRQ_LEVEL); pcf50606_set_usb_charging(on); rc = on; (void)set_irq_level(irqlevel); #else /* TODO: implement it for other targets... */ (void)on; #endif return rc; } bool usb_charging_enabled(void) { bool rc = false; #ifdef IRIVER_H300_SERIES /* TODO: read the state of the GPOOD2 register... * (this also means to set the irq level here) */ rc = pcf50606_usb_charging_enabled(); #else /* TODO: implement it for other targets... */ #endif logf("usb_charging_enabled: %s\n", rc ? "true" : "false" ); return rc; } #endif #endif #else #ifdef USB_NONE bool usb_inserted(void) { return false; } #endif /* Dummy simulator functions */ void usb_acknowledge(long id) { id = id; } void usb_init(void) { } void usb_start_monitoring(void) { } int usb_detect(void) { return USB_EXTRACTED; } void usb_wait_for_disconnect(struct event_queue *q) { (void)q; } #endif /* USB_NONE or SIMULATOR */