The tools/usb/aio_simple.c file when cross-compiled with
aarch64-*-gnu-gcc toolchain(s) leads to the following errors:
aio_simple.c:30:10: fatal error: endian.h: No such file or directory
30 | #include <endian.h>
| ^~~~~~~~~~
aio_simple.c:88:14: note: (near initialization for
'descriptors.fs_count')
aio_simple.c:110:14: error: initializer element is not constant
110 | .hs_count = htole32(3),
| ^~~~~~~
aio_simple.c:110:14: note: (near initialization for
'descriptors.hs_count')
aio_simple.c:124:22: error: initializer element is not constant
124 | .wMaxPacketSize = htole16(512),
| ^~~~~~~
aio_simple.c:124:22: note: (near initialization for
'descriptors.hs_descs.bulk_sink.wMaxPacketSize')
Fix these compilation issues by:
- Switching to _DEFAULT_SOURCE:
_BSD_SOURCE is deprecated and gives a build warning. Let's use
_DEFAULT_SOURCE instead.
- Currently this file uses library htole16/32 function calls.
Replace these with equivalent 'cpu_to_le16/32' calls.
Cc: Felipe Balbi <balbi@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxxxxxx>
---
.../simple/device_app/aio_simple.c | 44 +++++++++++++------
1 file 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,
},
};
--
2.37.3
