USB: ncm: added ncm.h with auxiliary definitions

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 114 insertions, 0 deletions

diff --git a/include/linux/usb/ncm.h b/include/linux/usb/ncm.h
new file mode 100644
index 000000000000..006d1064c8b2
--- /dev/null
+++ b/include/linux/usb/ncm.h
@@ -0,0 +1,114 @@
+/*
+ * USB CDC NCM auxiliary definitions
+ */
+
+#ifndef __LINUX_USB_NCM_H
+#define __LINUX_USB_NCM_H
+
+#include <linux/types.h>
+#include <linux/usb/cdc.h>
+#include <asm/unaligned.h>
+
+#define NCM_NTB_MIN_IN_SIZE             2048
+#define NCM_NTB_MIN_OUT_SIZE            2048
+
+#define NCM_CONTROL_TIMEOUT             (5 * 1000)
+
+/* bmNetworkCapabilities */
+
+#define NCM_NCAP_ETH_FILTER     (1 << 0)
+#define NCM_NCAP_NET_ADDRESS    (1 << 1)
+#define NCM_NCAP_ENCAP_COMM     (1 << 2)
+#define NCM_NCAP_MAX_DGRAM      (1 << 3)
+#define NCM_NCAP_CRC_MODE       (1 << 4)
+
+/*
+ * Here are options for NCM Datagram Pointer table (NDP) parser.
+ * There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3),
+ * in NDP16 offsets and sizes fields are 1 16bit word wide,
+ * in NDP32 -- 2 16bit words wide. Also signatures are different.
+ * To make the parser code the same, put the differences in the structure,
+ * and switch pointers to the structures when the format is changed.
+ */
+
+struct ndp_parser_opts {
+        u32             nth_sign;
+        u32             ndp_sign;
+        unsigned        nth_size;
+        unsigned        ndp_size;
+        unsigned        ndplen_align;
+        /* sizes in u16 units */
+        unsigned        dgram_item_len; /* index or length */
+        unsigned        block_length;
+        unsigned        fp_index;
+        unsigned        reserved1;
+        unsigned        reserved2;
+        unsigned        next_fp_index;
+};
+
+#define INIT_NDP16_OPTS {                                       \
+                .nth_sign = NCM_NTH16_SIGN,                     \
+                .ndp_sign = NCM_NDP16_NOCRC_SIGN,               \
+                .nth_size = sizeof(struct usb_cdc_ncm_nth16),   \
+                .ndp_size = sizeof(struct usb_cdc_ncm_ndp16),   \
+                .ndplen_align = 4,                              \
+                .dgram_item_len = 1,                            \
+                .block_length = 1,                              \
+                .fp_index = 1,                                  \
+                .reserved1 = 0,                                 \
+                .reserved2 = 0,                                 \
+                .next_fp_index = 1,                             \
+        }
+
+
+#define INIT_NDP32_OPTS {                                       \
+                .nth_sign = NCM_NTH32_SIGN,                     \
+                .ndp_sign = NCM_NDP32_NOCRC_SIGN,               \
+                .nth_size = sizeof(struct usb_cdc_ncm_nth32),   \
+                .ndp_size = sizeof(struct usb_cdc_ncm_ndp32),   \
+                .ndplen_align = 8,                              \
+                .dgram_item_len = 2,                            \
+                .block_length = 2,                              \
+                .fp_index = 2,                                  \
+                .reserved1 = 1,                                 \
+                .reserved2 = 2,                                 \
+                .next_fp_index = 2,                             \
+        }
+
+static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
+{
+        switch (size) {
+        case 1:
+                put_unaligned_le16((u16)val, *p);
+                break;
+        case 2:
+                put_unaligned_le32((u32)val, *p);
+
+                break;
+        default:
+                BUG();
+        }
+
+        *p += size;
+}
+
+static inline unsigned get_ncm(__le16 **p, unsigned size)
+{
+        unsigned tmp;
+
+        switch (size) {
+        case 1:
+                tmp = get_unaligned_le16(*p);
+                break;
+        case 2:
+                tmp = get_unaligned_le32(*p);
+                break;
+        default:
+                BUG();
+        }
+
+        *p += size;
+        return tmp;
+}
+
+#endif /* __LINUX_USB_NCM_H */