| Andrew Lunn | 6d91782 | 2017-05-26 01:03:21 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Marvell 88E6xxx SERDES manipulation, via SMI bus |
| 3 | * |
| 4 | * Copyright (c) 2008 Marvell Semiconductor |
| 5 | * |
| 6 | * Copyright (c) 2017 Andrew Lunn <andrew@lunn.ch> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/mii.h> |
| 15 | |
| 16 | #include "mv88e6xxx.h" |
| 17 | #include "phy.h" |
| 18 | #include "port.h" |
| 19 | #include "serdes.h" |
| 20 | |
| 21 | static int mv88e6352_serdes_read(struct mv88e6xxx_chip *chip, int reg, |
| 22 | u16 *val) |
| 23 | { |
| 24 | return mv88e6xxx_phy_page_read(chip, MV88E6352_ADDR_SERDES, |
| 25 | MV88E6352_SERDES_PAGE_FIBER, |
| 26 | reg, val); |
| 27 | } |
| 28 | |
| 29 | static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg, |
| 30 | u16 val) |
| 31 | { |
| 32 | return mv88e6xxx_phy_page_write(chip, MV88E6352_ADDR_SERDES, |
| 33 | MV88E6352_SERDES_PAGE_FIBER, |
| 34 | reg, val); |
| 35 | } |
| 36 | |
| 37 | static int mv88e6352_serdes_power_set(struct mv88e6xxx_chip *chip, bool on) |
| 38 | { |
| 39 | u16 val, new_val; |
| 40 | int err; |
| 41 | |
| 42 | err = mv88e6352_serdes_read(chip, MII_BMCR, &val); |
| 43 | if (err) |
| 44 | return err; |
| 45 | |
| 46 | if (on) |
| 47 | new_val = val & ~BMCR_PDOWN; |
| 48 | else |
| 49 | new_val = val | BMCR_PDOWN; |
| 50 | |
| 51 | if (val != new_val) |
| 52 | err = mv88e6352_serdes_write(chip, MII_BMCR, new_val); |
| 53 | |
| 54 | return err; |
| 55 | } |
| 56 | |
| 57 | int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on) |
| 58 | { |
| 59 | int err; |
| 60 | u8 cmode; |
| 61 | |
| 62 | err = mv88e6xxx_port_get_cmode(chip, port, &cmode); |
| 63 | if (err) |
| 64 | return err; |
| 65 | |
| 66 | if ((cmode == PORT_STATUS_CMODE_100BASE_X) || |
| 67 | (cmode == PORT_STATUS_CMODE_1000BASE_X) || |
| 68 | (cmode == PORT_STATUS_CMODE_SGMII)) { |
| 69 | err = mv88e6352_serdes_power_set(chip, on); |
| 70 | if (err < 0) |
| 71 | return err; |
| 72 | } |
| 73 | |
| 74 | return 0; |
| 75 | } |