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rockbox/firmware/usb.c

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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
*
* 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 HAVE_USBSTACK
#include "usb_core.h"
#endif
#ifdef IRIVER_H300_SERIES
#include "pcf50606.h" /* for pcf50606_usb_charging_... */
#endif
#include "logf.h"
/* Conditions under which we want the entire driver */
#if !defined(BOOTLOADER) || \
(defined(TOSHIBA_GIGABEAT_S) && defined(USE_ROCKBOX_USB) && defined(USB_STORAGE))
#define USB_FULL_INIT
#endif
extern void dbg_ports(void); /* NASTY! defined in apps/ */
#ifdef HAVE_LCD_BITMAP
bool do_screendump_instead_of_usb = false;
#if defined(USB_FULL_INIT) && defined(BOOTLOADER)
static void screen_dump(void) {}
#else
void screen_dump(void); /* Nasty again. Defined in apps/ too */
#endif
#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(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 struct thread_entry *usb_thread_entry;
#endif
static struct event_queue usb_queue;
static int last_usb_status;
static bool usb_monitor_enabled;
#ifdef HAVE_USBSTACK
static bool exclusive_ata_access;
#endif
#if defined(IPOD_COLOR) || defined(IPOD_4G) \
|| defined(IPOD_MINI) || defined(IPOD_MINI2G)
static int firewire_countdown;
static bool last_firewire_status;
#endif
#ifdef USB_FULL_INIT
#ifndef HAVE_USBSTACK
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);
}
}
#endif
static void try_reboot(void)
{
#ifndef HAVE_FLASH_STORAGE
ata_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 */
system_reboot(); /* Reboot */
}
static void usb_thread(void)
{
int num_acks_to_expect = -1;
bool waiting_for_ack;
struct queue_event ev;
waiting_for_ack = false;
while(1)
{
queue_wait(&usb_queue, &ev);
switch(ev.id)
{
#ifdef HAVE_USBSTACK
case USB_TRANSFER_COMPLETION:
usb_core_handle_transfer_completion((struct usb_transfer_completion_event_data*)ev.data);
break;
#endif
#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 defined(IRIVER_H10) || defined (IRIVER_H10_5GB)
if((button_status() & ~USBPOWER_BTN_IGNORE) != USBPOWER_BUTTON)
#else
if((button_status() & ~USBPOWER_BTN_IGNORE) == USBPOWER_BUTTON)
#endif
{
usb_state = USB_POWERED;
#ifdef HAVE_USBSTACK
usb_core_enable_driver(USB_DRIVER_MASS_STORAGE,false);
usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY,true);
usb_enable(true);
#endif
}
else
#endif
{
#ifdef HAVE_USBSTACK
/* Set the state to USB_POWERED for now. if a real
connection is detected it will switch to USB_INSERTED */
usb_state = USB_POWERED;
usb_core_enable_driver(USB_DRIVER_MASS_STORAGE,true);
usb_core_enable_driver(USB_DRIVER_CHARGING_ONLY,false);
usb_enable(true);
#else
/* 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);
#endif
}
break;
#ifdef HAVE_USBSTACK
case USB_REQUEST_DISK:
if(!waiting_for_ack)
{
/* 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 USB_RELEASE_DISK:
if(!waiting_for_ack)
{
/* 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_DISCONNECTED, 0) - 1;
waiting_for_ack = true;
DEBUGF("USB inserted. Waiting for ack from %d threads...\n",
num_acks_to_expect);
}
break;
#endif
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");
#ifdef HAVE_USBSTACK
#ifndef USE_ROCKBOX_USB
/* until we have native mass-storage mode, we want to reboot on
usb host connect */
usb_enable(true);
try_reboot();
#endif /* USE_ROCKBOX_USB */
#ifdef HAVE_PRIORITY_SCHEDULING
thread_set_priority(usb_thread_entry,PRIORITY_REALTIME);
#endif
exclusive_ata_access = true;
#else
usb_slave_mode(true);
cpu_idle_mode(true);
#endif
usb_state = USB_INSERTED;
waiting_for_ack = false;
}
else
{
DEBUGF("usb: got ack, %d to go...\n",
num_acks_to_expect);
}
}
break;
case USB_EXTRACTED:
#ifdef HAVE_USBSTACK
usb_enable(false);
#ifdef HAVE_PRIORITY_SCHEDULING
thread_set_priority(usb_thread_entry,PRIORITY_SYSTEM);
#endif
#endif
#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
#ifndef 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);
cpu_idle_mode(false);
}
#endif
usb_state = USB_EXTRACTED;
#ifdef HAVE_USBSTACK
if(exclusive_ata_access)
{
exclusive_ata_access = false;
#endif
/* 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);
#ifdef HAVE_USBSTACK
}
#endif
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");
waiting_for_ack = false;
}
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
if(usb_state == USB_INSERTED)
{
usb_enable(false);
usb_mmc_countdown = HZ/2; /* re-enable after 0.5 sec */
}
break;
#endif
case USB_REENABLE:
if(usb_state == USB_INSERTED)
usb_enable(true); /* reenable only if still inserted */
break;
#endif
case USB_REQUEST_REBOOT:
#ifdef HAVE_USB_POWER
if((button_status() & ~USBPOWER_BTN_IGNORE) != USBPOWER_BUTTON)
#endif
try_reboot();
break;
}
}
}
#endif
#ifdef HAVE_USBSTACK
void usb_signal_transfer_completion(struct usb_transfer_completion_event_data* event_data)
{
queue_post(&usb_queue, USB_TRANSFER_COMPLETION, (intptr_t)event_data);
}
#endif
#ifdef USB_FULL_INIT
static void usb_tick(void)
{
int current_status;
if(usb_monitor_enabled)
{
#if defined(IPOD_COLOR) || defined(IPOD_4G) \
|| defined(IPOD_MINI) || defined(IPOD_MINI2G)
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
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;
#ifdef HAVE_USBSTACK
exclusive_ata_access = false;
#endif
usb_monitor_enabled = false;
countdown = -1;
#if defined(IPOD_COLOR) || defined(IPOD_4G) \
|| defined(IPOD_MINI) || defined(IPOD_MINI2G)
firewire_countdown = -1;
last_firewire_status = false;
#endif
usb_init_device();
#ifdef USB_FULL_INIT
usb_enable(false);
#endif
/* We assume that the USB cable is extracted */
last_usb_status = USB_EXTRACTED;
#ifdef USB_FULL_INIT
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));
tick_add_task(usb_tick);
#endif
}
void usb_wait_for_disconnect(struct event_queue *q)
{
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;
}
}
}
int usb_wait_for_disconnect_w_tmo(struct event_queue *q, int ticks)
{
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;
break;
case SYS_TIMEOUT:
return 1;
break;
}
}
}
void usb_start_monitoring(void)
{
usb_monitor_enabled = true;
}
#ifdef TOSHIBA_GIGABEAT_S
void usb_stop_monitoring(void)
{
tick_remove_task(usb_tick);
usb_monitor_enabled = false;
}
#endif
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
void usb_request_exclusive_ata(void)
{
/* This is not really a clean place to start boosting the cpu. but it's
* currently the best one. We want to get rid of having to boost the cpu
* for usb anyway */
trigger_cpu_boost();
if(!exclusive_ata_access) {
queue_post(&usb_queue, USB_REQUEST_DISK, 0);
}
}
void usb_release_exclusive_ata(void)
{
cancel_cpu_boost();
if(exclusive_ata_access) {
queue_post(&usb_queue, USB_RELEASE_DISK, 0);
exclusive_ata_access = false;
}
}
bool usb_exclusive_ata(void)
{
return exclusive_ata_access;
}
#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 = disable_irq_save();
pcf50606_set_usb_charging(on);
rc = on;
restore_irq(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 %s", rc ? "enabled" : "disabled" );
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 */
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