diff options
Diffstat (limited to 'drivers/usb/common/debug.c')
| -rw-r--r-- | drivers/usb/common/debug.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/usb/common/debug.c b/drivers/usb/common/debug.c new file mode 100644 index 000000000000..92a986aeaa5d --- /dev/null +++ b/drivers/usb/common/debug.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: GPL-2.0 +/** + * Common USB debugging functions + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <[email protected]>, + * Sebastian Andrzej Siewior <[email protected]> + */ + +#include <linux/usb/ch9.h> + +static void usb_decode_get_status(__u8 bRequestType, __u16 wIndex, + __u16 wLength, char *str, size_t size) +{ + switch (bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + snprintf(str, size, "Get Device Status(Length = %d)", wLength); + break; + case USB_RECIP_INTERFACE: + snprintf(str, size, + "Get Interface Status(Intf = %d, Length = %d)", + wIndex, wLength); + break; + case USB_RECIP_ENDPOINT: + snprintf(str, size, "Get Endpoint Status(ep%d%s)", + wIndex & ~USB_DIR_IN, + wIndex & USB_DIR_IN ? "in" : "out"); + break; + } +} + +static const char *usb_decode_device_feature(u16 wValue) +{ + switch (wValue) { + case USB_DEVICE_SELF_POWERED: + return "Self Powered"; + case USB_DEVICE_REMOTE_WAKEUP: + return "Remote Wakeup"; + case USB_DEVICE_TEST_MODE: + return "Test Mode"; + case USB_DEVICE_U1_ENABLE: + return "U1 Enable"; + case USB_DEVICE_U2_ENABLE: + return "U2 Enable"; + case USB_DEVICE_LTM_ENABLE: + return "LTM Enable"; + default: + return "UNKNOWN"; + } +} + +static const char *usb_decode_test_mode(u16 wIndex) +{ + switch (wIndex) { + case TEST_J: + return ": TEST_J"; + case TEST_K: + return ": TEST_K"; + case TEST_SE0_NAK: + return ": TEST_SE0_NAK"; + case TEST_PACKET: + return ": TEST_PACKET"; + case TEST_FORCE_EN: + return ": TEST_FORCE_EN"; + default: + return ": UNKNOWN"; + } +} + +static void usb_decode_set_clear_feature(__u8 bRequestType, + __u8 bRequest, __u16 wValue, + __u16 wIndex, char *str, size_t size) +{ + switch (bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + snprintf(str, size, "%s Device Feature(%s%s)", + bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set", + usb_decode_device_feature(wValue), + wValue == USB_DEVICE_TEST_MODE ? + usb_decode_test_mode(wIndex) : ""); + break; + case USB_RECIP_INTERFACE: + snprintf(str, size, "%s Interface Feature(%s)", + bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set", + wValue == USB_INTRF_FUNC_SUSPEND ? + "Function Suspend" : "UNKNOWN"); + break; + case USB_RECIP_ENDPOINT: + snprintf(str, size, "%s Endpoint Feature(%s ep%d%s)", + bRequest == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set", + wValue == USB_ENDPOINT_HALT ? "Halt" : "UNKNOWN", + wIndex & ~USB_DIR_IN, + wIndex & USB_DIR_IN ? "in" : "out"); + break; + } +} + +static void usb_decode_set_address(__u16 wValue, char *str, size_t size) +{ + snprintf(str, size, "Set Address(Addr = %02x)", wValue); +} + +static void usb_decode_get_set_descriptor(__u8 bRequestType, __u8 bRequest, + __u16 wValue, __u16 wIndex, + __u16 wLength, char *str, size_t size) +{ + char *s; + + switch (wValue >> 8) { + case USB_DT_DEVICE: + s = "Device"; + break; + case USB_DT_CONFIG: + s = "Configuration"; + break; + case USB_DT_STRING: + s = "String"; + break; + case USB_DT_INTERFACE: + s = "Interface"; + break; + case USB_DT_ENDPOINT: + s = "Endpoint"; + break; + case USB_DT_DEVICE_QUALIFIER: + s = "Device Qualifier"; + break; + case USB_DT_OTHER_SPEED_CONFIG: + s = "Other Speed Config"; + break; + case USB_DT_INTERFACE_POWER: + s = "Interface Power"; + break; + case USB_DT_OTG: + s = "OTG"; + break; + case USB_DT_DEBUG: + s = "Debug"; + break; + case USB_DT_INTERFACE_ASSOCIATION: + s = "Interface Association"; + break; + case USB_DT_BOS: + s = "BOS"; + break; + case USB_DT_DEVICE_CAPABILITY: + s = "Device Capability"; + break; + case USB_DT_PIPE_USAGE: + s = "Pipe Usage"; + break; + case USB_DT_SS_ENDPOINT_COMP: + s = "SS Endpoint Companion"; + break; + case USB_DT_SSP_ISOC_ENDPOINT_COMP: + s = "SSP Isochronous Endpoint Companion"; + break; + default: + s = "UNKNOWN"; + break; + } + + snprintf(str, size, "%s %s Descriptor(Index = %d, Length = %d)", + bRequest == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set", + s, wValue & 0xff, wLength); +} + +static void usb_decode_get_configuration(__u16 wLength, char *str, size_t size) +{ + snprintf(str, size, "Get Configuration(Length = %d)", wLength); +} + +static void usb_decode_set_configuration(__u8 wValue, char *str, size_t size) +{ + snprintf(str, size, "Set Configuration(Config = %d)", wValue); +} + +static void usb_decode_get_intf(__u16 wIndex, __u16 wLength, char *str, + size_t size) +{ + snprintf(str, size, "Get Interface(Intf = %d, Length = %d)", + wIndex, wLength); +} + +static void usb_decode_set_intf(__u8 wValue, __u16 wIndex, char *str, + size_t size) +{ + snprintf(str, size, "Set Interface(Intf = %d, Alt.Setting = %d)", + wIndex, wValue); +} + +static void usb_decode_synch_frame(__u16 wIndex, __u16 wLength, + char *str, size_t size) +{ + snprintf(str, size, "Synch Frame(Endpoint = %d, Length = %d)", + wIndex, wLength); +} + +static void usb_decode_set_sel(__u16 wLength, char *str, size_t size) +{ + snprintf(str, size, "Set SEL(Length = %d)", wLength); +} + +static void usb_decode_set_isoch_delay(__u8 wValue, char *str, size_t size) +{ + snprintf(str, size, "Set Isochronous Delay(Delay = %d ns)", wValue); +} + +/** + * usb_decode_ctrl - returns a string representation of ctrl request + */ +const char *usb_decode_ctrl(char *str, size_t size, __u8 bRequestType, + __u8 bRequest, __u16 wValue, __u16 wIndex, + __u16 wLength) +{ + switch (bRequest) { + case USB_REQ_GET_STATUS: + usb_decode_get_status(bRequestType, wIndex, wLength, str, size); + break; + case USB_REQ_CLEAR_FEATURE: + case USB_REQ_SET_FEATURE: + usb_decode_set_clear_feature(bRequestType, bRequest, wValue, + wIndex, str, size); + break; + case USB_REQ_SET_ADDRESS: + usb_decode_set_address(wValue, str, size); + break; + case USB_REQ_GET_DESCRIPTOR: + case USB_REQ_SET_DESCRIPTOR: + usb_decode_get_set_descriptor(bRequestType, bRequest, wValue, + wIndex, wLength, str, size); + break; + case USB_REQ_GET_CONFIGURATION: + usb_decode_get_configuration(wLength, str, size); + break; + case USB_REQ_SET_CONFIGURATION: + usb_decode_set_configuration(wValue, str, size); + break; + case USB_REQ_GET_INTERFACE: + usb_decode_get_intf(wIndex, wLength, str, size); + break; + case USB_REQ_SET_INTERFACE: + usb_decode_set_intf(wValue, wIndex, str, size); + break; + case USB_REQ_SYNCH_FRAME: + usb_decode_synch_frame(wIndex, wLength, str, size); + break; + case USB_REQ_SET_SEL: + usb_decode_set_sel(wLength, str, size); + break; + case USB_REQ_SET_ISOCH_DELAY: + usb_decode_set_isoch_delay(wValue, str, size); + break; + default: + snprintf(str, size, "%02x %02x %02x %02x %02x %02x %02x %02x", + bRequestType, bRequest, + (u8)(cpu_to_le16(wValue) & 0xff), + (u8)(cpu_to_le16(wValue) >> 8), + (u8)(cpu_to_le16(wIndex) & 0xff), + (u8)(cpu_to_le16(wIndex) >> 8), + (u8)(cpu_to_le16(wLength) & 0xff), + (u8)(cpu_to_le16(wLength) >> 8)); + } + + return str; +} +EXPORT_SYMBOL_GPL(usb_decode_ctrl); |