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rockbox/firmware/usb.c
Tomer Shalev 92737a3877 Revert disabling of USB HID while in charging mode (introduced by r23322), in 
order to prevent having no interface at all when USB HID is disabled and the
DAP is connected in charge-only mode (thanks for gevaerts for noticing).


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23323 a1c6a512-1295-4272-9138-f99709370657
2009-10-23 13:52:21 +00:00

739 lines
19 KiB
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/***************************************************************************
* __________ __ ___.
* 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
*
* 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 "config.h"
#include "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "system.h"
#include "debug.h"
#include "storage.h"
#include "fat.h"
#include "disk.h"
#include "panic.h"
#include "lcd.h"
#include "usb-target.h"
#include "usb.h"
#include "button.h"
#include "sprintf.h"
#include "string.h"
#ifdef HAVE_USBSTACK
#include "usb_core.h"
#endif
#include "logf.h"
#include "screendump.h"
/* Conditions under which we want the entire driver */
#if !defined(BOOTLOADER) || (CONFIG_CPU == SH7034) || \
(defined(TOSHIBA_GIGABEAT_S) && defined(USE_ROCKBOX_USB) && defined(USB_ENABLE_STORAGE)) || \
(defined(HAVE_USBSTACK) && (defined(CREATIVE_ZVx))) || \
(defined(HAVE_USBSTACK) && (defined(OLYMPUS_MROBE_500))) || \
(defined(HAVE_USBSTACK) && (defined(IPOD_NANO2G))) || \
defined(CPU_TCC77X) || defined(CPU_TCC780X) || \
(CONFIG_USBOTG == USBOTG_JZ4740)
#define USB_FULL_INIT
#endif
#ifdef HAVE_LCD_BITMAP
bool do_screendump_instead_of_usb = false;
#endif
#if !defined(SIMULATOR) && !defined(USB_NONE)
static int usb_state;
#if (CONFIG_STORAGE & STORAGE_MMC) && defined(USB_FULL_INIT)
static int usb_mmc_countdown = 0;
#endif
/* FIXME: The extra 0x800 is consumed by fat_mount() when the fsinfo
needs updating */
#ifdef USB_FULL_INIT
static long usb_stack[(DEFAULT_STACK_SIZE + 0x800)/sizeof(long)];
static const char usb_thread_name[] = "usb";
static unsigned int usb_thread_entry = 0;
#ifndef USB_STATUS_BY_EVENT
#define NUM_POLL_READINGS (HZ/5)
static int countdown;
#endif /* USB_STATUS_BY_EVENT */
#endif /* USB_FULL_INIT */
static struct event_queue usb_queue;
static bool usb_monitor_enabled;
static int last_usb_status;
#ifdef HAVE_USBSTACK
static bool exclusive_storage_access;
#endif
#ifdef USB_FIREWIRE_HANDLING
static int firewire_countdown;
static bool last_firewire_status;
#endif
#ifdef USB_FULL_INIT
#if defined(USB_FIREWIRE_HANDLING) \
|| (defined(HAVE_USBSTACK) && !defined(USE_ROCKBOX_USB))
static void try_reboot(void)
{
#ifdef HAVE_DISK_STORAGE
storage_sleepnow(); /* Immediately spindown the disk. */
sleep(HZ*2);
#endif
#ifdef IPOD_ARCH /* The following code is based on ipodlinux */
#if CONFIG_CPU == PP5020
memcpy((void *)0x40017f00, "diskmode\0\0hotstuff\0\0\1", 21);
#elif CONFIG_CPU == PP5022
memcpy((void *)0x4001ff00, "diskmode\0\0hotstuff\0\0\1", 21);
#endif /* CONFIG_CPU */
#endif /* IPOD_ARCH */
#ifdef IPOD_NANO2G
memcpy((void *)0x0002bf00, "diskmodehotstuff\1\0\0\0", 20);
#endif
system_reboot(); /* Reboot */
}
#endif /* USB_FIRWIRE_HANDLING || (HAVE_USBSTACK && !USE_ROCKBOX_USB) */
#ifdef HAVE_USBSTACK
/* inline since branch is chosen at compile time */
static inline void usb_slave_mode(bool on)
{
#ifdef USE_ROCKBOX_USB
int rc;
if (on)
{
trigger_cpu_boost();
#ifdef HAVE_PRIORITY_SCHEDULING
thread_set_priority(THREAD_ID_CURRENT, PRIORITY_REALTIME);
#endif
usb_attach();
}
else /* usb_state == USB_INSERTED (only!) */
{
#ifndef USB_DETECT_BY_DRV
usb_enable(false);
#endif
#ifdef HAVE_PRIORITY_SCHEDULING
thread_set_priority(THREAD_ID_CURRENT, PRIORITY_SYSTEM);
#endif
/* Entered exclusive mode */
rc = disk_mount_all();
if (rc <= 0) /* no partition */
panicf("mount: %d",rc);
cancel_cpu_boost();
}
#else /* !USE_ROCKBOX_USB */
if (on)
{
/* until we have native mass-storage mode, we want to reboot on
usb host connect */
try_reboot();
}
#endif /* USE_ROCKBOX_USB */
}
void usb_signal_transfer_completion(
struct usb_transfer_completion_event_data* event_data)
{
queue_post(&usb_queue, USB_TRANSFER_COMPLETION, (intptr_t)event_data);
}
#else /* !HAVE_USBSTACK */
/* inline since branch is chosen at compile time */
static inline void usb_slave_mode(bool on)
{
int rc;
if(on)
{
DEBUGF("Entering USB slave mode\n");
storage_soft_reset();
storage_init();
storage_enable(false);
usb_enable(true);
cpu_idle_mode(true);
}
else
{
DEBUGF("Leaving USB slave mode\n");
cpu_idle_mode(false);
/* Let the ISDx00 settle */
sleep(HZ*1);
usb_enable(false);
rc = storage_init();
if(rc)
panicf("storage: %d",rc);
rc = disk_mount_all();
if (rc <= 0) /* no partition */
panicf("mount: %d",rc);
}
}
#endif /* HAVE_USBSTACK */
#ifdef HAVE_USB_POWER
static inline bool usb_power_button(void)
{
#if (defined(IRIVER_H10) || defined (IRIVER_H10_5GB)) && !defined(USE_ROCKBOX_USB)
return (button_status() & ~USBPOWER_BTN_IGNORE) != USBPOWER_BUTTON;
#else
return (button_status() & ~USBPOWER_BTN_IGNORE) == USBPOWER_BUTTON;
#endif
}
#ifdef USB_FIREWIRE_HANDLING
static inline bool usb_reboot_button(void)
{
return (button_status() & ~USBPOWER_BTN_IGNORE) != USBPOWER_BUTTON;
}
#endif
#endif /* HAVE_USB_POWER */
#ifdef USB_ENABLE_HID
static bool usb_hid = true;
#endif
static void usb_thread(void)
{
int num_acks_to_expect = 0;
struct queue_event ev;
while(1)
{
queue_wait(&usb_queue, &ev);
switch(ev.id)
{
#ifdef USB_DRIVER_CLOSE
case USB_QUIT:
return;
#endif
#ifdef HAVE_USBSTACK
case USB_TRANSFER_COMPLETION:
usb_core_handle_transfer_completion(
(struct usb_transfer_completion_event_data*)ev.data);
break;
#endif
#ifdef USB_DETECT_BY_DRV
/* In this case, these events the handle cable insertion USB
* driver determines INSERTED/EXTRACTED state. */
case USB_POWERED:
/* Set the state to USB_POWERED for now and enable the driver
* to detect a bus reset only. If a bus reset is detected,
* USB_INSERTED will be received. */
usb_state = USB_POWERED;
usb_enable(true);
break;
case USB_UNPOWERED:
usb_enable(false);
/* This part shouldn't be obligatory for anything that can
* reliably detect removal of the data lines. USB_EXTRACTED
* could be posted on that event while bus power remains
* available. */
queue_post(&usb_queue, USB_EXTRACTED, 0);
break;
#endif /* USB_DETECT_BY_DRV */
case USB_INSERTED:
#ifdef HAVE_LCD_BITMAP
if(do_screendump_instead_of_usb)
{
usb_state = USB_SCREENDUMP;
screen_dump();
#ifdef HAVE_REMOTE_LCD
remote_screen_dump();
#endif
break;
}
#endif
#ifdef HAVE_USB_POWER
if(usb_power_button())
{
/* Only charging is desired */
usb_state = USB_POWERED;
#ifdef HAVE_USBSTACK
#ifdef USB_ENABLE_STORAGE
usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, false);
#endif
#ifdef USB_ENABLE_HID
#ifdef USB_ENABLE_CHARGING_ONLY
usb_core_enable_driver(USB_DRIVER_HID, false);
#else
usb_core_enable_driver(USB_DRIVER_HID, true);
#endif /* USB_ENABLE_CHARGING_ONLY */
#endif /* USB_ENABLE_HID */
#ifdef USB_ENABLE_CHARGING_ONLY
usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, true);
#endif
usb_attach();
#endif
break;
}
#endif /* HAVE_USB_POWER */
#ifdef HAVE_USBSTACK
#ifdef HAVE_USB_POWER
/* Set the state to USB_POWERED for now. If permission to connect
* by threads and storage is granted it will be changed to
* USB_CONNECTED. */
usb_state = USB_POWERED;
#endif
#ifdef USB_ENABLE_STORAGE
usb_core_enable_driver(USB_DRIVER_MASS_STORAGE, true);
#endif
#ifdef USB_ENABLE_HID
usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
#endif
#ifdef USB_ENABLE_CHARGING_ONLY
usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY, false);
#endif
/* Check any drivers enabled at this point for exclusive storage
* access requirements. */
exclusive_storage_access = usb_core_any_exclusive_storage();
if(!exclusive_storage_access)
{
usb_attach();
break;
}
#endif /* HAVE_USBSTACK */
/* Tell all threads that they have to back off the storage.
We subtract one for our own thread. */
num_acks_to_expect = queue_broadcast(SYS_USB_CONNECTED, 0) - 1;
DEBUGF("USB inserted. Waiting for ack from %d threads...\n",
num_acks_to_expect);
break;
case SYS_USB_CONNECTED_ACK:
if(num_acks_to_expect > 0 && --num_acks_to_expect == 0)
{
DEBUGF("All threads have acknowledged the connect.\n");
usb_slave_mode(true);
usb_state = USB_INSERTED;
}
else
{
DEBUGF("usb: got ack, %d to go...\n",
num_acks_to_expect);
}
break;
case USB_EXTRACTED:
#ifdef HAVE_LCD_BITMAP
if(usb_state == USB_SCREENDUMP)
{
usb_state = USB_EXTRACTED;
break; /* Connected for screendump only */
}
#endif
#ifndef HAVE_USBSTACK /* Stack must undo this if POWERED state was transitional */
#ifdef HAVE_USB_POWER
if(usb_state == USB_POWERED)
{
usb_state = USB_EXTRACTED;
break;
}
#endif
#endif /* HAVE_USBSTACK */
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);
}
usb_state = USB_EXTRACTED;
#ifdef HAVE_USBSTACK
if(!exclusive_storage_access)
{
#ifndef USB_DETECT_BY_DRV /* Disabled handling USB_UNPOWERED */
usb_enable(false);
#endif
break;
}
#endif /* HAVE_USBSTACK */
num_acks_to_expect = usb_release_exclusive_storage();
break;
case SYS_USB_DISCONNECTED_ACK:
if(num_acks_to_expect > 0 && --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_HOTSWAP
case SYS_HOTSWAP_INSERTED:
case SYS_HOTSWAP_EXTRACTED:
#ifdef HAVE_USBSTACK
usb_core_hotswap_event(1,ev.id == SYS_HOTSWAP_INSERTED);
#else /* !HAVE_USBSTACK */
if(usb_state == USB_INSERTED)
{
usb_enable(false);
#if (CONFIG_STORAGE & STORAGE_MMC)
usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */
#endif /* STORAGE_MMC */
}
#endif /* HAVE_USBSTACK */
break;
#if (CONFIG_STORAGE & STORAGE_MMC)
case USB_REENABLE:
if(usb_state == USB_INSERTED)
usb_enable(true); /* reenable only if still inserted */
break;
#endif /* STORAGE_MMC */
#endif /* HAVE_HOTSWAP */
#ifdef USB_FIREWIRE_HANDLING
case USB_REQUEST_REBOOT:
#ifdef HAVE_USB_POWER
if (usb_reboot_button())
#endif
try_reboot();
break;
#endif /* USB_FIREWIRE_HANDLING */
}
}
}
#ifdef USB_STATUS_BY_EVENT
void usb_status_event(int current_status)
{
/* Caller isn't expected to filter for changes in status.
* current_status:
* USB_DETECT_BY_DRV: USB_POWERED, USB_UNPOWERED, USB_INSERTED (driver)
* else: USB_INSERTED, USB_EXTRACTED
*/
if(usb_monitor_enabled)
{
int oldstatus = disable_irq_save(); /* Dual-use function */
if(last_usb_status != current_status)
{
last_usb_status = current_status;
queue_post(&usb_queue, current_status, 0);
}
restore_irq(oldstatus);
}
}
void usb_start_monitoring(void)
{
int oldstatus = disable_irq_save(); /* Sync to event */
int status = usb_detect();
usb_monitor_enabled = true;
#ifdef USB_DETECT_BY_DRV
status = (status == USB_INSERTED) ? USB_POWERED : USB_UNPOWERED;
#endif
usb_status_event(status);
#ifdef USB_FIREWIRE_HANDLING
if (firewire_detect())
usb_firewire_connect_event();
#endif
restore_irq(oldstatus);
}
#ifdef USB_FIREWIRE_HANDLING
void usb_firewire_connect_event(void)
{
queue_post(&usb_queue, USB_REQUEST_REBOOT, 0);
}
#endif /* USB_FIREWIRE_HANDLING */
#else /* !USB_STATUS_BY_EVENT */
static void usb_tick(void)
{
int current_status;
if(usb_monitor_enabled)
{
#ifdef USB_FIREWIRE_HANDLING
int current_firewire_status = firewire_detect();
if(current_firewire_status != last_firewire_status)
{
last_firewire_status = current_firewire_status;
firewire_countdown = NUM_POLL_READINGS;
}
else
{
/* Count down until it gets negative */
if(firewire_countdown >= 0)
firewire_countdown--;
/* Report to the thread if we have had 3 identical status
readings in a row */
if(firewire_countdown == 0)
{
queue_post(&usb_queue, USB_REQUEST_REBOOT, 0);
}
}
#endif /* USB_FIREWIRE_HANDLING */
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);
}
}
}
#if (CONFIG_STORAGE & STORAGE_MMC)
if(usb_mmc_countdown > 0)
{
usb_mmc_countdown--;
if (usb_mmc_countdown == 0)
queue_post(&usb_queue, USB_REENABLE, 0);
}
#endif
}
void usb_start_monitoring(void)
{
usb_monitor_enabled = true;
}
#endif /* USB_STATUS_BY_EVENT */
#endif /* USB_FULL_INIT */
void usb_acknowledge(long id)
{
queue_post(&usb_queue, id, 0);
}
void usb_init(void)
{
/* We assume that the USB cable is extracted */
usb_state = USB_EXTRACTED;
#ifdef USB_DETECT_BY_DRV
last_usb_status = USB_UNPOWERED;
#else
last_usb_status = USB_EXTRACTED;
#endif
usb_monitor_enabled = false;
#ifdef HAVE_USBSTACK
exclusive_storage_access = false;
#endif
#ifdef USB_FIREWIRE_HANDLING
firewire_countdown = -1;
last_firewire_status = false;
#endif
usb_init_device();
#ifdef USB_FULL_INIT
usb_enable(false);
queue_init(&usb_queue, true);
usb_thread_entry = create_thread(usb_thread, usb_stack,
sizeof(usb_stack), 0, usb_thread_name
IF_PRIO(, PRIORITY_SYSTEM) IF_COP(, CPU));
#ifndef USB_STATUS_BY_EVENT
countdown = -1;
tick_add_task(usb_tick);
#endif
#endif /* USB_FULL_INIT */
}
void usb_wait_for_disconnect(struct event_queue *q)
{
#ifdef USB_FULL_INIT
struct queue_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;
}
}
#else
(void)q;
#endif /* USB_FULL_INIT */
}
int usb_wait_for_disconnect_w_tmo(struct event_queue *q, int ticks)
{
#ifdef USB_FULL_INIT
struct queue_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;
case SYS_TIMEOUT:
return 1;
}
}
#else
(void)q; (void)ticks;
return 0;
#endif /* USB_FULL_INIT */
}
#ifdef USB_DRIVER_CLOSE
void usb_close(void)
{
unsigned int thread = usb_thread_entry;
usb_thread_entry = 0;
if (thread == 0)
return;
#ifndef USB_STATUS_BY_EVENT
tick_remove_task(usb_tick);
#endif
usb_monitor_enabled = false;
queue_post(&usb_queue, USB_QUIT, 0);
thread_wait(thread);
}
#endif /* USB_DRIVER_CLOSE */
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_USBSTACK
bool usb_exclusive_storage(void)
{
return exclusive_storage_access;
}
#endif
int usb_release_exclusive_storage(void)
{
int num_acks_to_expect;
#ifdef HAVE_USBSTACK
exclusive_storage_access = false;
#endif /* HAVE_USBSTACK */
/* Tell all threads that we are back in business */
num_acks_to_expect =
queue_broadcast(SYS_USB_DISCONNECTED, 0) - 1;
DEBUGF("USB extracted. Waiting for ack from %d threads...\n",
num_acks_to_expect);
return num_acks_to_expect;
}
#ifdef HAVE_USB_POWER
bool usb_powered(void)
{
return usb_state == USB_POWERED;
}
#endif
#ifdef USB_ENABLE_HID
void usb_set_hid(bool enable)
{
usb_hid = enable;
usb_core_enable_driver(USB_DRIVER_HID, usb_hid);
}
#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 */
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