diff options
author | Vivien Didelot <vivien.didelot@savoirfairelinux.com> | 2017-03-11 16:12:48 -0500 |
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committer | David S. Miller <davem@davemloft.net> | 2017-03-12 23:54:05 -0700 |
commit | 720c6343ef67de926251b0c1b3bb0b76d2cff946 (patch) | |
tree | 333c17e1b75592c6420a7cb3641f69fc1dabf79b /drivers/net/dsa/mv88e6xxx/global1_atu.c | |
parent | 4d294af2cd932e0c1b2534137b143920c17dffd6 (diff) |
net: dsa: mv88e6xxx: move ATU ageing time setter
Move the ATU ageing time setter code in a new global1_atu.c file, which
will be extended in future patches to contains all consequent Global (1)
ATU support code.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa/mv88e6xxx/global1_atu.c')
-rw-r--r-- | drivers/net/dsa/mv88e6xxx/global1_atu.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/global1_atu.c b/drivers/net/dsa/mv88e6xxx/global1_atu.c new file mode 100644 index 000000000000..4d0ada9efc6d --- /dev/null +++ b/drivers/net/dsa/mv88e6xxx/global1_atu.c @@ -0,0 +1,43 @@ +/* + * Marvell 88E6xxx Address Translation Unit (ATU) support + * + * Copyright (c) 2008 Marvell Semiconductor + * Copyright (c) 2017 Savoir-faire Linux, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include "mv88e6xxx.h" +#include "global1.h" + +/* Offset 0x0A: ATU Control Register */ + +int mv88e6xxx_g1_atu_set_age_time(struct mv88e6xxx_chip *chip, + unsigned int msecs) +{ + const unsigned int coeff = chip->info->age_time_coeff; + const unsigned int min = 0x01 * coeff; + const unsigned int max = 0xff * coeff; + u8 age_time; + u16 val; + int err; + + if (msecs < min || msecs > max) + return -ERANGE; + + /* Round to nearest multiple of coeff */ + age_time = (msecs + coeff / 2) / coeff; + + err = mv88e6xxx_g1_read(chip, GLOBAL_ATU_CONTROL, &val); + if (err) + return err; + + /* AgeTime is 11:4 bits */ + val &= ~0xff0; + val |= age_time << 4; + + return mv88e6xxx_g1_write(chip, GLOBAL_ATU_CONTROL, val); +} |