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Allow the user to leave MSC mode by pressing the USB POWER button (the one that's used to go to usb power mode on plugin) when the host OS hasn't locked the device.

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This only works for devices that expose a removable device, so for now the gigabeat S is out of luck.
(slightly modified from FS#9993)


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20244 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Frank Gevaerts 2009-03-08 18:45:19 +00:00
parent 30a2713b6e
commit 871db6f5d9
3 changed files with 54 additions and 13 deletions
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21
firmware/usbstack/usb_storage.c
View file

@ -260,6 +260,7 @@ static void receive_block_data(void *data,int size);
static void fill_inquiry(IF_MV_NONVOID(int lun));
static void send_and_read_next(void);
static bool ejected[NUM_VOLUMES];
static bool locked[NUM_VOLUMES];
static int usb_interface;
static int ep_in, ep_out;
@ -304,14 +305,14 @@ static bool check_disk_present(IF_MV_NONVOID(int volume))
#endif
}
static void try_release_ata(void)
void usb_storage_try_release_storage(void)
{
/* Check if there is a connected drive left. If not,
release excusive access */
bool canrelease=true;
int i;
for(i=0;i<NUM_VOLUMES;i++) {
if(ejected[i]==false){
if(ejected[i]==false && locked[i]==true){
canrelease=false;
break;
}
@ -331,7 +332,9 @@ void usb_storage_notify_hotswap(int volume,bool inserted)
}
else {
ejected[volume] = true;
try_release_ata();
/* If this happens while the device is locked, weird things may happen.
At least try to keep our state consistent */
locked[volume]=false;
}
}
#endif
@ -419,6 +422,14 @@ void usb_storage_init_connection(void)
int i;
for(i=0;i<NUM_VOLUMES;i++) {
#ifdef TOSHIBA_GIGABEAT_S
/* As long as the Gigabeat S is a non-removable device, we need
to mark the device as locked to avoid usb_storage_try_release_ata()
to leave MSC mode while the device is in use */
locked[i] = true;
#else
locked[i] = false;
#endif
ejected[i] = !check_disk_present(IF_MV(i));
queue_broadcast(SYS_USB_LUN_LOCKED, (i<<16)+0);
}
@ -685,7 +696,6 @@ static void handle_scsi(struct command_block_wrapper* cbw)
#ifdef HAVE_HOTSWAP
if(storage_removable(lun) && !storage_present(lun)) {
ejected[lun] = true;
try_release_ata();
}
#endif
@ -889,7 +899,6 @@ static void handle_scsi(struct command_block_wrapper* cbw)
{
logf("scsi eject");
ejected[lun]=true;
try_release_ata();
}
}
}
@ -900,10 +909,12 @@ static void handle_scsi(struct command_block_wrapper* cbw)
logf("scsi allow_medium_removal %d",lun);
if((cbw->command_block[4] & 0x03) == 0)
{
locked[lun]=false;
queue_broadcast(SYS_USB_LUN_LOCKED, (lun<<16)+0);
}
else
{
locked[lun]=true;
queue_broadcast(SYS_USB_LUN_LOCKED, (lun<<16)+1);
}
send_csw(UMS_STATUS_GOOD);