diff options
Diffstat (limited to 'tools/usb/ffs-aio-example/simple/device_app/aio_simple.c')
| -rw-r--r-- | tools/usb/ffs-aio-example/simple/device_app/aio_simple.c | 44 |
1 files changed, 31 insertions, 13 deletions
diff --git a/tools/usb/ffs-aio-example/simple/device_app/aio_simple.c b/tools/usb/ffs-aio-example/simple/device_app/aio_simple.c index 1f44a29818bf..96616eb4600b 100644 --- a/tools/usb/ffs-aio-example/simple/device_app/aio_simple.c +++ b/tools/usb/ffs-aio-example/simple/device_app/aio_simple.c @@ -25,7 +25,9 @@ * For more information, please refer to <http://unlicense.org/> */ -#define _BSD_SOURCE /* for endian.h */ +/* $(CROSS_COMPILE)cc -g -o aio_simple aio_simple.c -laio */ + +#define _DEFAULT_SOURCE /* for endian.h */ #include <endian.h> #include <errno.h> @@ -49,6 +51,22 @@ #define BUF_LEN 8192 +/* + * cpu_to_le16/32 are used when initializing structures, a context where a + * function call is not allowed. To solve this, we code cpu_to_le16/32 in a way + * that allows them to be used when initializing structures. + */ + +#if BYTE_ORDER == __LITTLE_ENDIAN +#define cpu_to_le16(x) (x) +#define cpu_to_le32(x) (x) +#else +#define cpu_to_le16(x) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)) +#define cpu_to_le32(x) \ + ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >> 8) | \ + (((x) & 0x0000ff00u) << 8) | (((x) & 0x000000ffu) << 24)) +#endif + /******************** Descriptors and Strings *******************************/ static const struct { @@ -62,12 +80,12 @@ static const struct { } __attribute__ ((__packed__)) fs_descs, hs_descs; } __attribute__ ((__packed__)) descriptors = { .header = { - .magic = htole32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), - .flags = htole32(FUNCTIONFS_HAS_FS_DESC | + .magic = cpu_to_le32(FUNCTIONFS_DESCRIPTORS_MAGIC_V2), + .flags = cpu_to_le32(FUNCTIONFS_HAS_FS_DESC | FUNCTIONFS_HAS_HS_DESC), - .length = htole32(sizeof(descriptors)), + .length = cpu_to_le32(sizeof(descriptors)), }, - .fs_count = htole32(3), + .fs_count = cpu_to_le32(3), .fs_descs = { .intf = { .bLength = sizeof(descriptors.fs_descs.intf), @@ -89,7 +107,7 @@ static const struct { .bmAttributes = USB_ENDPOINT_XFER_BULK, }, }, - .hs_count = htole32(3), + .hs_count = cpu_to_le32(3), .hs_descs = { .intf = { .bLength = sizeof(descriptors.hs_descs.intf), @@ -103,14 +121,14 @@ static const struct { .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 1 | USB_DIR_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, - .wMaxPacketSize = htole16(512), + .wMaxPacketSize = cpu_to_le16(512), }, .bulk_source = { .bLength = sizeof(descriptors.hs_descs.bulk_source), .bDescriptorType = USB_DT_ENDPOINT, .bEndpointAddress = 2 | USB_DIR_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, - .wMaxPacketSize = htole16(512), + .wMaxPacketSize = cpu_to_le16(512), }, }, }; @@ -125,13 +143,13 @@ static const struct { } __attribute__ ((__packed__)) lang0; } __attribute__ ((__packed__)) strings = { .header = { - .magic = htole32(FUNCTIONFS_STRINGS_MAGIC), - .length = htole32(sizeof(strings)), - .str_count = htole32(1), - .lang_count = htole32(1), + .magic = cpu_to_le32(FUNCTIONFS_STRINGS_MAGIC), + .length = cpu_to_le32(sizeof(strings)), + .str_count = cpu_to_le32(1), + .lang_count = cpu_to_le32(1), }, .lang0 = { - htole16(0x0409), /* en-us */ + cpu_to_le16(0x0409), /* en-us */ STR_INTERFACE, }, }; |