Ben Hutchings | 8ceee66 | 2008-04-27 12:55:59 +0100 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Driver for Solarflare Solarstorm network controllers and boards |
| 3 | * Copyright 2005-2006 Fen Systems Ltd. |
| 4 | * Copyright 2006 Solarflare Communications Inc. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation, incorporated herein by reference. |
| 9 | */ |
| 10 | |
| 11 | #ifndef EFX_GMII_H |
| 12 | #define EFX_GMII_H |
| 13 | |
| 14 | /* |
| 15 | * GMII interface |
| 16 | */ |
| 17 | |
| 18 | #include <linux/mii.h> |
| 19 | |
| 20 | /* GMII registers, excluding registers already defined as MII |
| 21 | * registers in mii.h |
| 22 | */ |
| 23 | #define GMII_IER 0x12 /* Interrupt enable register */ |
| 24 | #define GMII_ISR 0x13 /* Interrupt status register */ |
| 25 | |
| 26 | /* Interrupt enable register */ |
| 27 | #define IER_ANEG_ERR 0x8000 /* Bit 15 - autonegotiation error */ |
| 28 | #define IER_SPEED_CHG 0x4000 /* Bit 14 - speed changed */ |
| 29 | #define IER_DUPLEX_CHG 0x2000 /* Bit 13 - duplex changed */ |
| 30 | #define IER_PAGE_RCVD 0x1000 /* Bit 12 - page received */ |
| 31 | #define IER_ANEG_DONE 0x0800 /* Bit 11 - autonegotiation complete */ |
| 32 | #define IER_LINK_CHG 0x0400 /* Bit 10 - link status changed */ |
| 33 | #define IER_SYM_ERR 0x0200 /* Bit 9 - symbol error */ |
| 34 | #define IER_FALSE_CARRIER 0x0100 /* Bit 8 - false carrier */ |
| 35 | #define IER_FIFO_ERR 0x0080 /* Bit 7 - FIFO over/underflow */ |
| 36 | #define IER_MDIX_CHG 0x0040 /* Bit 6 - MDI crossover changed */ |
| 37 | #define IER_DOWNSHIFT 0x0020 /* Bit 5 - downshift */ |
| 38 | #define IER_ENERGY 0x0010 /* Bit 4 - energy detect */ |
| 39 | #define IER_DTE_POWER 0x0004 /* Bit 2 - DTE power detect */ |
| 40 | #define IER_POLARITY_CHG 0x0002 /* Bit 1 - polarity changed */ |
| 41 | #define IER_JABBER 0x0001 /* Bit 0 - jabber */ |
| 42 | |
| 43 | /* Interrupt status register */ |
| 44 | #define ISR_ANEG_ERR 0x8000 /* Bit 15 - autonegotiation error */ |
| 45 | #define ISR_SPEED_CHG 0x4000 /* Bit 14 - speed changed */ |
| 46 | #define ISR_DUPLEX_CHG 0x2000 /* Bit 13 - duplex changed */ |
| 47 | #define ISR_PAGE_RCVD 0x1000 /* Bit 12 - page received */ |
| 48 | #define ISR_ANEG_DONE 0x0800 /* Bit 11 - autonegotiation complete */ |
| 49 | #define ISR_LINK_CHG 0x0400 /* Bit 10 - link status changed */ |
| 50 | #define ISR_SYM_ERR 0x0200 /* Bit 9 - symbol error */ |
| 51 | #define ISR_FALSE_CARRIER 0x0100 /* Bit 8 - false carrier */ |
| 52 | #define ISR_FIFO_ERR 0x0080 /* Bit 7 - FIFO over/underflow */ |
| 53 | #define ISR_MDIX_CHG 0x0040 /* Bit 6 - MDI crossover changed */ |
| 54 | #define ISR_DOWNSHIFT 0x0020 /* Bit 5 - downshift */ |
| 55 | #define ISR_ENERGY 0x0010 /* Bit 4 - energy detect */ |
| 56 | #define ISR_DTE_POWER 0x0004 /* Bit 2 - DTE power detect */ |
| 57 | #define ISR_POLARITY_CHG 0x0002 /* Bit 1 - polarity changed */ |
| 58 | #define ISR_JABBER 0x0001 /* Bit 0 - jabber */ |
| 59 | |
| 60 | /* Logically extended advertisement register */ |
| 61 | #define GM_ADVERTISE_SLCT ADVERTISE_SLCT |
| 62 | #define GM_ADVERTISE_CSMA ADVERTISE_CSMA |
| 63 | #define GM_ADVERTISE_10HALF ADVERTISE_10HALF |
| 64 | #define GM_ADVERTISE_1000XFULL ADVERTISE_1000XFULL |
| 65 | #define GM_ADVERTISE_10FULL ADVERTISE_10FULL |
| 66 | #define GM_ADVERTISE_1000XHALF ADVERTISE_1000XHALF |
| 67 | #define GM_ADVERTISE_100HALF ADVERTISE_100HALF |
| 68 | #define GM_ADVERTISE_1000XPAUSE ADVERTISE_1000XPAUSE |
| 69 | #define GM_ADVERTISE_100FULL ADVERTISE_100FULL |
| 70 | #define GM_ADVERTISE_1000XPSE_ASYM ADVERTISE_1000XPSE_ASYM |
| 71 | #define GM_ADVERTISE_100BASE4 ADVERTISE_100BASE4 |
| 72 | #define GM_ADVERTISE_PAUSE_CAP ADVERTISE_PAUSE_CAP |
| 73 | #define GM_ADVERTISE_PAUSE_ASYM ADVERTISE_PAUSE_ASYM |
| 74 | #define GM_ADVERTISE_RESV ADVERTISE_RESV |
| 75 | #define GM_ADVERTISE_RFAULT ADVERTISE_RFAULT |
| 76 | #define GM_ADVERTISE_LPACK ADVERTISE_LPACK |
| 77 | #define GM_ADVERTISE_NPAGE ADVERTISE_NPAGE |
| 78 | #define GM_ADVERTISE_1000FULL (ADVERTISE_1000FULL << 8) |
| 79 | #define GM_ADVERTISE_1000HALF (ADVERTISE_1000HALF << 8) |
| 80 | #define GM_ADVERTISE_1000 (GM_ADVERTISE_1000FULL | \ |
| 81 | GM_ADVERTISE_1000HALF) |
| 82 | #define GM_ADVERTISE_FULL (GM_ADVERTISE_1000FULL | \ |
| 83 | ADVERTISE_FULL) |
| 84 | #define GM_ADVERTISE_ALL (GM_ADVERTISE_1000FULL | \ |
| 85 | GM_ADVERTISE_1000HALF | \ |
| 86 | ADVERTISE_ALL) |
| 87 | |
| 88 | /* Logically extended link partner ability register */ |
| 89 | #define GM_LPA_SLCT LPA_SLCT |
| 90 | #define GM_LPA_10HALF LPA_10HALF |
| 91 | #define GM_LPA_1000XFULL LPA_1000XFULL |
| 92 | #define GM_LPA_10FULL LPA_10FULL |
| 93 | #define GM_LPA_1000XHALF LPA_1000XHALF |
| 94 | #define GM_LPA_100HALF LPA_100HALF |
| 95 | #define GM_LPA_1000XPAUSE LPA_1000XPAUSE |
| 96 | #define GM_LPA_100FULL LPA_100FULL |
| 97 | #define GM_LPA_1000XPAUSE_ASYM LPA_1000XPAUSE_ASYM |
| 98 | #define GM_LPA_100BASE4 LPA_100BASE4 |
| 99 | #define GM_LPA_PAUSE_CAP LPA_PAUSE_CAP |
| 100 | #define GM_LPA_PAUSE_ASYM LPA_PAUSE_ASYM |
| 101 | #define GM_LPA_RESV LPA_RESV |
| 102 | #define GM_LPA_RFAULT LPA_RFAULT |
| 103 | #define GM_LPA_LPACK LPA_LPACK |
| 104 | #define GM_LPA_NPAGE LPA_NPAGE |
| 105 | #define GM_LPA_1000FULL (LPA_1000FULL << 6) |
| 106 | #define GM_LPA_1000HALF (LPA_1000HALF << 6) |
| 107 | #define GM_LPA_10000FULL 0x00040000 |
| 108 | #define GM_LPA_10000HALF 0x00080000 |
| 109 | #define GM_LPA_DUPLEX (GM_LPA_1000FULL | GM_LPA_10000FULL \ |
| 110 | | LPA_DUPLEX) |
| 111 | #define GM_LPA_10 (LPA_10FULL | LPA_10HALF) |
| 112 | #define GM_LPA_100 LPA_100 |
| 113 | #define GM_LPA_1000 (GM_LPA_1000FULL | GM_LPA_1000HALF) |
| 114 | #define GM_LPA_10000 (GM_LPA_10000FULL | GM_LPA_10000HALF) |
| 115 | |
| 116 | /* Retrieve GMII autonegotiation advertised abilities |
| 117 | * |
| 118 | * The MII advertisment register (MII_ADVERTISE) is logically extended |
| 119 | * to include advertisement bits ADVERTISE_1000FULL and |
| 120 | * ADVERTISE_1000HALF from MII_CTRL1000. The result can be tested |
| 121 | * against the GM_ADVERTISE_xxx constants. |
| 122 | */ |
| 123 | static inline unsigned int gmii_advertised(struct mii_if_info *gmii) |
| 124 | { |
| 125 | unsigned int advertise; |
| 126 | unsigned int ctrl1000; |
| 127 | |
| 128 | advertise = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_ADVERTISE); |
| 129 | ctrl1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_CTRL1000); |
| 130 | return (((ctrl1000 << 8) & GM_ADVERTISE_1000) | advertise); |
| 131 | } |
| 132 | |
| 133 | /* Retrieve GMII autonegotiation link partner abilities |
| 134 | * |
| 135 | * The MII link partner ability register (MII_LPA) is logically |
| 136 | * extended by adding bits LPA_1000HALF and LPA_1000FULL from |
| 137 | * MII_STAT1000. The result can be tested against the GM_LPA_xxx |
| 138 | * constants. |
| 139 | */ |
| 140 | static inline unsigned int gmii_lpa(struct mii_if_info *gmii) |
| 141 | { |
| 142 | unsigned int lpa; |
| 143 | unsigned int stat1000; |
| 144 | |
| 145 | lpa = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_LPA); |
| 146 | stat1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_STAT1000); |
| 147 | return (((stat1000 << 6) & GM_LPA_1000) | lpa); |
| 148 | } |
| 149 | |
| 150 | /* Calculate GMII autonegotiated link technology |
| 151 | * |
| 152 | * "negotiated" should be the result of gmii_advertised() logically |
| 153 | * ANDed with the result of gmii_lpa(). |
| 154 | * |
| 155 | * "tech" will be negotiated with the unused bits masked out. For |
| 156 | * example, if both ends of the link are capable of both |
| 157 | * GM_LPA_1000FULL and GM_LPA_100FULL, GM_LPA_100FULL will be masked |
| 158 | * out. |
| 159 | */ |
| 160 | static inline unsigned int gmii_nway_result(unsigned int negotiated) |
| 161 | { |
| 162 | unsigned int other_bits; |
| 163 | |
| 164 | /* Mask out the speed and duplexity bits */ |
| 165 | other_bits = negotiated & ~(GM_LPA_10 | GM_LPA_100 | GM_LPA_1000); |
| 166 | |
| 167 | if (negotiated & GM_LPA_1000FULL) |
| 168 | return (other_bits | GM_LPA_1000FULL); |
| 169 | else if (negotiated & GM_LPA_1000HALF) |
| 170 | return (other_bits | GM_LPA_1000HALF); |
| 171 | else |
| 172 | return (other_bits | mii_nway_result(negotiated)); |
| 173 | } |
| 174 | |
| 175 | /* Calculate GMII non-autonegotiated link technology |
| 176 | * |
| 177 | * This provides an equivalent to gmii_nway_result for the case when |
| 178 | * autonegotiation is disabled. |
| 179 | */ |
| 180 | static inline unsigned int gmii_forced_result(unsigned int bmcr) |
| 181 | { |
| 182 | unsigned int result; |
| 183 | int full_duplex; |
| 184 | |
| 185 | full_duplex = bmcr & BMCR_FULLDPLX; |
| 186 | if (bmcr & BMCR_SPEED1000) |
| 187 | result = full_duplex ? GM_LPA_1000FULL : GM_LPA_1000HALF; |
| 188 | else if (bmcr & BMCR_SPEED100) |
| 189 | result = full_duplex ? GM_LPA_100FULL : GM_LPA_100HALF; |
| 190 | else |
| 191 | result = full_duplex ? GM_LPA_10FULL : GM_LPA_10HALF; |
| 192 | return result; |
| 193 | } |
| 194 | |
| 195 | #endif /* EFX_GMII_H */ |