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Code Issues Releases Activity

Add endpoint max packet size field to the UsbStatus response block.

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And fix typos. lol
This commit is contained in:
Pablo Curiel 2020-10-25 11:42:53 -04:00
parent 7e2aa976b4
commit c44b9c998e
2 changed files with 30 additions and 36 deletions
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2
source/title.h
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@ -97,7 +97,7 @@ TitleApplicationMetadata **titleGetApplicationMetadataEntries(bool is_system, u3
/// Returns NULL if an error occurs.
TitleInfo *titleGetInfoFromStorageByTitleId(u8 storage_id, u64 title_id);
/// Populates a TitleUserApplicationData element using an user application ID.
/// Populates a TitleUserApplicationData element using a user application ID.
bool titleGetUserApplicationData(u64 app_id, TitleUserApplicationData *out);
/// Returns true if orphan titles are available.

62
source/usb.c
View file

@ -99,7 +99,8 @@ typedef enum {
typedef struct {
u32 magic;
u32 status; ///< UsbStatusType.
u8 reserved[0x8];
u16 max_packet_size; ///< USB host endpoint max packet size.
u8 reserved[0x6];
} UsbStatus;
/* Global variables. */
@ -127,7 +128,6 @@ static void usbDetectionThreadFunc(void *arg);
static bool usbStartSession(void);
static void usbEndSession(void);
static bool usbGetMaxPacketSizeFromHost(void);
NX_INLINE void usbPrepareCommandHeader(u32 cmd, u32 cmd_block_size);
static u32 usbSendCommand(size_t cmd_size);
@ -470,11 +470,7 @@ static void usbDetectionThreadFunc(void *arg)
g_usbSessionStarted = usbStartSession();
if (g_usbSessionStarted)
{
/* Get the endpoint max packet size from the response sent by the USB host. */
/* This is done to accurately know when and where to enable Zero Length Termination (ZLT) packets during bulk transfers. */
/* As much as I'd like to avoid this, usb:ds doesn't disclose information such as the exact device descriptor and/or speed used by the USB host. */
/* If this step fails (e.g. unexpected max packet size), the write endpoint will be stalled and we'll wait until a new USB session is established. */
if (!(skip_wait = !usbGetMaxPacketSizeFromHost())) LOGFILE("USB session successfully established. Endpoint max packet size: 0x%04X.", g_usbEndpointMaxPacketSize);
LOGFILE("USB session successfully established. Endpoint max packet size: 0x%04X.", g_usbEndpointMaxPacketSize);
} else {
/* Check if the exit event was triggered while waiting for a session to be established. */
if (g_usbDetectionThreadExitFlag) break;
@ -522,7 +518,31 @@ static bool usbStartSession(void)
cmd_size = (sizeof(UsbCommandHeader) + sizeof(UsbCommandStartSession));
status = usbSendCommand(cmd_size);
if (status != UsbStatusType_Success) usbLogStatusDetail(status);
if (status == UsbStatusType_Success)
{
/* Get the endpoint max packet size from the response sent by the USB host. */
/* This is done to accurately know when and where to enable Zero Length Termination (ZLT) packets during bulk transfers. */
/* As much as I'd like to avoid this, usb:ds doesn't disclose information such as the exact device descriptor and/or speed used by the USB host. */
/* If this step fails (e.g. unexpected max packet size), the write endpoint will be stalled and we'll wait until a new USB session is established. */
UsbStatus *cmd_status = (UsbStatus*)g_usbTransferBuffer;
g_usbEndpointMaxPacketSize = cmd_status->max_packet_size;
if (g_usbEndpointMaxPacketSize != USB_FS_EP_MAX_PACKET_SIZE && g_usbEndpointMaxPacketSize != USB_HS_EP_MAX_PACKET_SIZE && g_usbEndpointMaxPacketSize != USB_SS_EP_MAX_PACKET_SIZE)
{
LOGFILE("Invalid endpoint max packet size value received from USB host: 0x%04X.", g_usbEndpointMaxPacketSize);
/* Stall input (write) endpoint. */
/* This will force the client to stop the current session, so a new one will have to be established. */
rwlockWriteLock(&(g_usbDeviceInterface.lock_in));
usbDsEndpoint_Stall(g_usbDeviceInterface.endpoint_in);
rwlockWriteUnlock(&(g_usbDeviceInterface.lock_in));
/* Reset flags. */
g_usbEndpointMaxPacketSize = 0;
cmd_status->status = status = UsbStatusType_HostIoError;
}
} else {
usbLogStatusDetail(status);
}
return (status == UsbStatusType_Success);
}
@ -540,30 +560,6 @@ static void usbEndSession(void)
if (!usbWrite(g_usbTransferBuffer, sizeof(UsbCommandHeader), true)) LOGFILE("Failed to send EndSession command!");
}
static bool usbGetMaxPacketSizeFromHost(void)
{
/* Get the endpoint max packet size from the data chunk sent by the USB host. */
g_usbEndpointMaxPacketSize = *((u16*)(g_usbTransferBuffer + sizeof(UsbStatus)));
/* Verify the max packet size value. */
if (g_usbEndpointMaxPacketSize != USB_FS_EP_MAX_PACKET_SIZE && g_usbEndpointMaxPacketSize != USB_HS_EP_MAX_PACKET_SIZE && g_usbEndpointMaxPacketSize != USB_SS_EP_MAX_PACKET_SIZE)
{
/* Stall input (write) endpoint. */
/* This will force the client to stop the current session, so a new one will have to be established. */
rwlockWriteLock(&(g_usbDeviceInterface.lock_in));
usbDsEndpoint_Stall(g_usbDeviceInterface.endpoint_in);
rwlockWriteUnlock(&(g_usbDeviceInterface.lock_in));
/* Reset flags. */
g_usbSessionStarted = false;
g_usbEndpointMaxPacketSize = 0;
return false;
}
return true;
}
NX_INLINE void usbPrepareCommandHeader(u32 cmd, u32 cmd_block_size)
{
if (cmd > UsbCommandType_EndSession) return;
@ -592,9 +588,7 @@ static u32 usbSendCommand(size_t cmd_size)
return UsbStatusType_WriteCommandFailed;
}
/* Make sure to read the USB endpoint max packet size being used by the host if this is a StartSession command. It must be part of the response after the UsbStatus block. */
u64 read_size = sizeof(UsbStatus);
if (cmd == UsbCommandType_StartSession) read_size += sizeof(g_usbEndpointMaxPacketSize);
if (!usbRead(g_usbTransferBuffer, read_size, true))
{