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Diffstat (limited to '')
-rw-r--r-- | drivers/usb/storage/debug.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/usb/storage/debug.h b/drivers/usb/storage/debug.h new file mode 100644 index 000000000..a6505ceb6 --- /dev/null +++ b/drivers/usb/storage/debug.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Driver for USB Mass Storage compliant devices + * Debugging Functions Header File + * + * Current development and maintenance by: + * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net) + * + * Initial work by: + * (c) 1999 Michael Gee (michael@linuxspecific.com) + * + * This driver is based on the 'USB Mass Storage Class' document. This + * describes in detail the protocol used to communicate with such + * devices. Clearly, the designers had SCSI and ATAPI commands in + * mind when they created this document. The commands are all very + * similar to commands in the SCSI-II and ATAPI specifications. + * + * It is important to note that in a number of cases this class + * exhibits class-specific exemptions from the USB specification. + * Notably the usage of NAK, STALL and ACK differs from the norm, in + * that they are used to communicate wait, failed and OK on commands. + * + * Also, for certain devices, the interrupt endpoint is used to convey + * status of a command. + */ + +#ifndef _DEBUG_H_ +#define _DEBUG_H_ + +#include <linux/kernel.h> + +#ifdef CONFIG_USB_STORAGE_DEBUG +void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb); +void usb_stor_show_sense(const struct us_data *us, unsigned char key, + unsigned char asc, unsigned char ascq); +__printf(2, 3) void usb_stor_dbg(const struct us_data *us, + const char *fmt, ...); + +#define US_DEBUG(x) x +#else +__printf(2, 3) +static inline void _usb_stor_dbg(const struct us_data *us, + const char *fmt, ...) +{ +} +#define usb_stor_dbg(us, fmt, ...) \ + do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0) +#define US_DEBUG(x) +#endif + +#endif |