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| author | Holger Brunck <holger.brunck@keymile.com> | 2017-05-17 17:24:38 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-18 10:28:39 -0400 |
| commit | 067bb938dad61e58fc3d6a0e090b72ec011851cd (patch) | |
| tree | 617e9b79f94dfe0cdff171fae024b7f13353b657 /include/soc | |
| parent | c7f235a7c2d09b1b83671ba2d93ebee981554467 (diff) | |
| download | linux-067bb938dad61e58fc3d6a0e090b72ec011851cd.tar.gz linux-067bb938dad61e58fc3d6a0e090b72ec011851cd.tar.bz2 linux-067bb938dad61e58fc3d6a0e090b72ec011851cd.zip | |
net/wan/fsl_ucc_hdlc: add hdlc-bus support
This adds support for hdlc-bus mode to the fsl_ucc_hdlc driver. This can
be enabled with the "fsl,hdlc-bus" property in the DTS node of the
corresponding ucc.
This aligns the configuration of the UPSMR and GUMR registers to what is
done in our ucc_hdlc driver (that only support hdlc-bus mode) and with
the QuickEngine's documentation for hdlc-bus mode.
GUMR/SYNL is set to AUTO for the busmode as in this case the CD signal
is ignored. The brkpt_support is enabled to set the HBM1 bit in the
CMXUCR register to configure an open-drain connected HDLC bus.
Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Cc: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/soc')
| -rw-r--r-- | include/soc/fsl/qe/qe.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/soc/fsl/qe/qe.h b/include/soc/fsl/qe/qe.h index 226f915a68c2..b3d1aff5e8ad 100644 --- a/include/soc/fsl/qe/qe.h +++ b/include/soc/fsl/qe/qe.h @@ -789,6 +789,11 @@ struct ucc_slow_pram { #define UCC_GETH_UPSMR_SMM 0x00000080 #define UCC_GETH_UPSMR_SGMM 0x00000020 +/* UCC Protocol Specific Mode Register (UPSMR), when used for HDLC */ +#define UCC_HDLC_UPSMR_RTE 0x02000000 +#define UCC_HDLC_UPSMR_BUS 0x00200000 +#define UCC_HDLC_UPSMR_CW8 0x00007000 + /* UCC Transmit On Demand Register (UTODR) */ #define UCC_SLOW_TOD 0x8000 #define UCC_FAST_TOD 0x8000 |