diff options
| author | Stefan Wahren <stefan.wahren@i2se.com> | 2017-05-29 13:57:19 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-30 13:57:30 -0400 |
| commit | 60d6702464b9d667312035eb3bd9d390af9626dd (patch) | |
| tree | 83741bcd9a1371592442a2bb5ee3afe0079425a7 /drivers/net/ethernet/qualcomm/qca_7k_common.h | |
| parent | f1789286e0200f6a40fc20b05ee0e5e62d044a9e (diff) | |
| download | linux-60d6702464b9d667312035eb3bd9d390af9626dd.tar.bz2 | |
net: qualcomm: prepare frame decoding for UART driver
Unfortunately the frame format is not exactly identical between SPI
and UART. In case of SPI there is an additional HW length at the
beginning. So store the initial state to make the decoding state machine
more flexible and easy to extend for UART support.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/qualcomm/qca_7k_common.h')
| -rw-r--r-- | drivers/net/ethernet/qualcomm/qca_7k_common.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/ethernet/qualcomm/qca_7k_common.h b/drivers/net/ethernet/qualcomm/qca_7k_common.h index 5df7c65d887c..07bdd6c4f728 100644 --- a/drivers/net/ethernet/qualcomm/qca_7k_common.h +++ b/drivers/net/ethernet/qualcomm/qca_7k_common.h @@ -61,6 +61,7 @@ #define QCAFRM_ERR_BASE -1000 enum qcafrm_state { + /* HW length is only available on SPI */ QCAFRM_HW_LEN0 = 0x8000, QCAFRM_HW_LEN1 = QCAFRM_HW_LEN0 - 1, QCAFRM_HW_LEN2 = QCAFRM_HW_LEN1 - 1, @@ -101,6 +102,8 @@ enum qcafrm_state { struct qcafrm_handle { /* Current decoding state */ enum qcafrm_state state; + /* Initial state depends on connection type */ + enum qcafrm_state init; /* Offset in buffer (borrowed for length too) */ u16 offset; @@ -113,9 +116,10 @@ u16 qcafrm_create_header(u8 *buf, u16 len); u16 qcafrm_create_footer(u8 *buf); -static inline void qcafrm_fsm_init(struct qcafrm_handle *handle) +static inline void qcafrm_fsm_init_spi(struct qcafrm_handle *handle) { - handle->state = QCAFRM_HW_LEN0; + handle->init = QCAFRM_HW_LEN0; + handle->state = handle->init; } /* Gather received bytes and try to extract a full Ethernet frame |