1 /* 2 * Copyright (c) 2019-2025 Allwinner Technology Co., Ltd. ALL rights reserved. 3 * 4 * Allwinner is a trademark of Allwinner Technology Co.,Ltd., registered in 5 * the the People's Republic of China and other countries. 6 * All Allwinner Technology Co.,Ltd. trademarks are used with permission. 7 * 8 * DISCLAIMER 9 * THIRD PARTY LICENCES MAY BE REQUIRED TO IMPLEMENT THE SOLUTION/PRODUCT. 10 * IF YOU NEED TO INTEGRATE THIRD PARTY’S TECHNOLOGY (SONY, DTS, DOLBY, AVS OR MPEGLA, ETC.) 11 * IN ALLWINNERS’SDK OR PRODUCTS, YOU SHALL BE SOLELY RESPONSIBLE TO OBTAIN 12 * ALL APPROPRIATELY REQUIRED THIRD PARTY LICENCES. 13 * ALLWINNER SHALL HAVE NO WARRANTY, INDEMNITY OR OTHER OBLIGATIONS WITH RESPECT TO MATTERS 14 * COVERED UNDER ANY REQUIRED THIRD PARTY LICENSE. 15 * YOU ARE SOLELY RESPONSIBLE FOR YOUR USAGE OF THIRD PARTY’S TECHNOLOGY. 16 * 17 * 18 * THIS SOFTWARE IS PROVIDED BY ALLWINNER"AS IS" AND TO THE MAXIMUM EXTENT 19 * PERMITTED BY LAW, ALLWINNER EXPRESSLY DISCLAIMS ALL WARRANTIES OF ANY KIND, 20 * WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION REGARDING 21 * THE TITLE, NON-INFRINGEMENT, ACCURACY, CONDITION, COMPLETENESS, PERFORMANCE 22 * OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 23 * IN NO EVENT SHALL ALLWINNER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS, OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 30 * OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef __SUNXI_HAL_MDIO_H__ 34 #define __SUNXI_HAL_MDIO_H__ 35 36 #include <sunxi_hal_mii.h> 37 38 /* MDIO Manageable Devices (MMDs). */ 39 #define MDIO_MMD_PMAPMD 1 /* Physical Medium Attachment/ 40 * Physical Medium Dependent */ 41 #define MDIO_MMD_WIS 2 /* WAN Interface Sublayer */ 42 #define MDIO_MMD_PCS 3 /* Physical Coding Sublayer */ 43 #define MDIO_MMD_PHYXS 4 /* PHY Extender Sublayer */ 44 #define MDIO_MMD_DTEXS 5 /* DTE Extender Sublayer */ 45 #define MDIO_MMD_TC 6 /* Transmission Convergence */ 46 #define MDIO_MMD_AN 7 /* Auto-Negotiation */ 47 #define MDIO_MMD_C22EXT 29 /* Clause 22 extension */ 48 #define MDIO_MMD_VEND1 30 /* Vendor specific 1 */ 49 #define MDIO_MMD_VEND2 31 /* Vendor specific 2 */ 50 51 /* Generic MDIO registers. */ 52 #define MDIO_CTRL1 MII_BMCR 53 #define MDIO_STAT1 MII_BMSR 54 #define MDIO_DEVID1 MII_PHYSID1 55 #define MDIO_DEVID2 MII_PHYSID2 56 #define MDIO_SPEED 4 /* Speed ability */ 57 #define MDIO_DEVS1 5 /* Devices in package */ 58 #define MDIO_DEVS2 6 59 #define MDIO_CTRL2 7 /* 10G control 2 */ 60 #define MDIO_STAT2 8 /* 10G status 2 */ 61 #define MDIO_PMA_TXDIS 9 /* 10G PMA/PMD transmit disable */ 62 #define MDIO_PMA_RXDET 10 /* 10G PMA/PMD receive signal detect */ 63 #define MDIO_PMA_EXTABLE 11 /* 10G PMA/PMD extended ability */ 64 #define MDIO_PKGID1 14 /* Package identifier */ 65 #define MDIO_PKGID2 15 66 #define MDIO_AN_ADVERTISE 16 /* AN advertising (base page) */ 67 #define MDIO_AN_LPA 19 /* AN LP abilities (base page) */ 68 #define MDIO_PHYXS_LNSTAT 24 /* PHY XGXS lane state */ 69 70 /* Media-dependent registers. */ 71 #define MDIO_PMA_10GBT_SWAPPOL 130 /* 10GBASE-T pair swap & polarity */ 72 #define MDIO_PMA_10GBT_TXPWR 131 /* 10GBASE-T TX power control */ 73 #define MDIO_PMA_10GBT_SNR 133 /* 10GBASE-T SNR margin, lane A. 74 * Lanes B-D are numbered 134-136. */ 75 #define MDIO_PMA_10GBR_FECABLE 170 /* 10GBASE-R FEC ability */ 76 #define MDIO_PCS_10GBX_STAT1 24 /* 10GBASE-X PCS status 1 */ 77 #define MDIO_PCS_10GBRT_STAT1 32 /* 10GBASE-R/-T PCS status 1 */ 78 #define MDIO_PCS_10GBRT_STAT2 33 /* 10GBASE-R/-T PCS status 2 */ 79 #define MDIO_AN_10GBT_CTRL 32 /* 10GBASE-T auto-negotiation control */ 80 #define MDIO_AN_10GBT_STAT 33 /* 10GBASE-T auto-negotiation status */ 81 #define MDIO_AN_EEE_ADV 60 /* EEE advertisement */ 82 83 /* LASI (Link Alarm Status Interrupt) registers, defined by XENPAK MSA. */ 84 #define MDIO_PMA_LASI_RXCTRL 0x9000 /* RX_ALARM control */ 85 #define MDIO_PMA_LASI_TXCTRL 0x9001 /* TX_ALARM control */ 86 #define MDIO_PMA_LASI_CTRL 0x9002 /* LASI control */ 87 #define MDIO_PMA_LASI_RXSTAT 0x9003 /* RX_ALARM status */ 88 #define MDIO_PMA_LASI_TXSTAT 0x9004 /* TX_ALARM status */ 89 #define MDIO_PMA_LASI_STAT 0x9005 /* LASI status */ 90 91 /* Control register 1. */ 92 /* Enable extended speed selection */ 93 #define MDIO_CTRL1_SPEEDSELEXT (BMCR_SPEED1000 | BMCR_SPEED100) 94 /* All speed selection bits */ 95 #define MDIO_CTRL1_SPEEDSEL (MDIO_CTRL1_SPEEDSELEXT | 0x003c) 96 #define MDIO_CTRL1_FULLDPLX BMCR_FULLDPLX 97 #define MDIO_CTRL1_LPOWER BMCR_PDOWN 98 #define MDIO_CTRL1_RESET BMCR_RESET 99 #define MDIO_PMA_CTRL1_LOOPBACK 0x0001 100 #define MDIO_PMA_CTRL1_SPEED1000 BMCR_SPEED1000 101 #define MDIO_PMA_CTRL1_SPEED100 BMCR_SPEED100 102 #define MDIO_PCS_CTRL1_LOOPBACK BMCR_LOOPBACK 103 #define MDIO_PHYXS_CTRL1_LOOPBACK BMCR_LOOPBACK 104 #define MDIO_AN_CTRL1_RESTART BMCR_ANRESTART 105 #define MDIO_AN_CTRL1_ENABLE BMCR_ANENABLE 106 #define MDIO_AN_CTRL1_XNP 0x2000 /* Enable extended next page */ 107 108 /* 10 Gb/s */ 109 #define MDIO_CTRL1_SPEED10G (MDIO_CTRL1_SPEEDSELEXT | 0x00) 110 /* 10PASS-TS/2BASE-TL */ 111 #define MDIO_CTRL1_SPEED10P2B (MDIO_CTRL1_SPEEDSELEXT | 0x04) 112 113 /* Status register 1. */ 114 #define MDIO_STAT1_LPOWERABLE 0x0002 /* Low-power ability */ 115 #define MDIO_STAT1_LSTATUS BMSR_LSTATUS 116 #define MDIO_STAT1_FAULT 0x0080 /* Fault */ 117 #define MDIO_AN_STAT1_LPABLE 0x0001 /* Link partner AN ability */ 118 #define MDIO_AN_STAT1_ABLE BMSR_ANEGCAPABLE 119 #define MDIO_AN_STAT1_RFAULT BMSR_RFAULT 120 #define MDIO_AN_STAT1_COMPLETE BMSR_ANEGCOMPLETE 121 #define MDIO_AN_STAT1_PAGE 0x0040 /* Page received */ 122 #define MDIO_AN_STAT1_XNP 0x0080 /* Extended next page status */ 123 124 /* Speed register. */ 125 #define MDIO_SPEED_10G 0x0001 /* 10G capable */ 126 #define MDIO_PMA_SPEED_2B 0x0002 /* 2BASE-TL capable */ 127 #define MDIO_PMA_SPEED_10P 0x0004 /* 10PASS-TS capable */ 128 #define MDIO_PMA_SPEED_1000 0x0010 /* 1000M capable */ 129 #define MDIO_PMA_SPEED_100 0x0020 /* 100M capable */ 130 #define MDIO_PMA_SPEED_10 0x0040 /* 10M capable */ 131 #define MDIO_PCS_SPEED_10P2B 0x0002 /* 10PASS-TS/2BASE-TL capable */ 132 133 /* Device present registers. */ 134 #define MDIO_DEVS_PRESENT(devad) (1 << (devad)) 135 #define MDIO_DEVS_PMAPMD MDIO_DEVS_PRESENT(MDIO_MMD_PMAPMD) 136 #define MDIO_DEVS_WIS MDIO_DEVS_PRESENT(MDIO_MMD_WIS) 137 #define MDIO_DEVS_PCS MDIO_DEVS_PRESENT(MDIO_MMD_PCS) 138 #define MDIO_DEVS_PHYXS MDIO_DEVS_PRESENT(MDIO_MMD_PHYXS) 139 #define MDIO_DEVS_DTEXS MDIO_DEVS_PRESENT(MDIO_MMD_DTEXS) 140 #define MDIO_DEVS_TC MDIO_DEVS_PRESENT(MDIO_MMD_TC) 141 #define MDIO_DEVS_AN MDIO_DEVS_PRESENT(MDIO_MMD_AN) 142 #define MDIO_DEVS_C22EXT MDIO_DEVS_PRESENT(MDIO_MMD_C22EXT) 143 #define MDIO_DEVS_VEND1 MDIO_DEVS_PRESENT(MDIO_MMD_VEND1) 144 #define MDIO_DEVS_VEND2 MDIO_DEVS_PRESENT(MDIO_MMD_VEND2) 145 146 #define MDIO_DEVS_LINK (MDIO_DEVS_PMAPMD | \ 147 MDIO_DEVS_WIS | \ 148 MDIO_DEVS_PCS | \ 149 MDIO_DEVS_PHYXS | \ 150 MDIO_DEVS_DTEXS | \ 151 MDIO_DEVS_AN) 152 153 /* Control register 2. */ 154 #define MDIO_PMA_CTRL2_TYPE 0x000f /* PMA/PMD type selection */ 155 #define MDIO_PMA_CTRL2_10GBCX4 0x0000 /* 10GBASE-CX4 type */ 156 #define MDIO_PMA_CTRL2_10GBEW 0x0001 /* 10GBASE-EW type */ 157 #define MDIO_PMA_CTRL2_10GBLW 0x0002 /* 10GBASE-LW type */ 158 #define MDIO_PMA_CTRL2_10GBSW 0x0003 /* 10GBASE-SW type */ 159 #define MDIO_PMA_CTRL2_10GBLX4 0x0004 /* 10GBASE-LX4 type */ 160 #define MDIO_PMA_CTRL2_10GBER 0x0005 /* 10GBASE-ER type */ 161 #define MDIO_PMA_CTRL2_10GBLR 0x0006 /* 10GBASE-LR type */ 162 #define MDIO_PMA_CTRL2_10GBSR 0x0007 /* 10GBASE-SR type */ 163 #define MDIO_PMA_CTRL2_10GBLRM 0x0008 /* 10GBASE-LRM type */ 164 #define MDIO_PMA_CTRL2_10GBT 0x0009 /* 10GBASE-T type */ 165 #define MDIO_PMA_CTRL2_10GBKX4 0x000a /* 10GBASE-KX4 type */ 166 #define MDIO_PMA_CTRL2_10GBKR 0x000b /* 10GBASE-KR type */ 167 #define MDIO_PMA_CTRL2_1000BT 0x000c /* 1000BASE-T type */ 168 #define MDIO_PMA_CTRL2_1000BKX 0x000d /* 1000BASE-KX type */ 169 #define MDIO_PMA_CTRL2_100BTX 0x000e /* 100BASE-TX type */ 170 #define MDIO_PMA_CTRL2_10BT 0x000f /* 10BASE-T type */ 171 #define MDIO_PCS_CTRL2_TYPE 0x0003 /* PCS type selection */ 172 #define MDIO_PCS_CTRL2_10GBR 0x0000 /* 10GBASE-R type */ 173 #define MDIO_PCS_CTRL2_10GBX 0x0001 /* 10GBASE-X type */ 174 #define MDIO_PCS_CTRL2_10GBW 0x0002 /* 10GBASE-W type */ 175 #define MDIO_PCS_CTRL2_10GBT 0x0003 /* 10GBASE-T type */ 176 177 /* Status register 2. */ 178 #define MDIO_STAT2_RXFAULT 0x0400 /* Receive fault */ 179 #define MDIO_STAT2_TXFAULT 0x0800 /* Transmit fault */ 180 #define MDIO_STAT2_DEVPRST 0xc000 /* Device present */ 181 #define MDIO_STAT2_DEVPRST_VAL 0x8000 /* Device present value */ 182 #define MDIO_PMA_STAT2_LBABLE 0x0001 /* PMA loopback ability */ 183 #define MDIO_PMA_STAT2_10GBEW 0x0002 /* 10GBASE-EW ability */ 184 #define MDIO_PMA_STAT2_10GBLW 0x0004 /* 10GBASE-LW ability */ 185 #define MDIO_PMA_STAT2_10GBSW 0x0008 /* 10GBASE-SW ability */ 186 #define MDIO_PMA_STAT2_10GBLX4 0x0010 /* 10GBASE-LX4 ability */ 187 #define MDIO_PMA_STAT2_10GBER 0x0020 /* 10GBASE-ER ability */ 188 #define MDIO_PMA_STAT2_10GBLR 0x0040 /* 10GBASE-LR ability */ 189 #define MDIO_PMA_STAT2_10GBSR 0x0080 /* 10GBASE-SR ability */ 190 #define MDIO_PMD_STAT2_TXDISAB 0x0100 /* PMD TX disable ability */ 191 #define MDIO_PMA_STAT2_EXTABLE 0x0200 /* Extended abilities */ 192 #define MDIO_PMA_STAT2_RXFLTABLE 0x1000 /* Receive fault ability */ 193 #define MDIO_PMA_STAT2_TXFLTABLE 0x2000 /* Transmit fault ability */ 194 #define MDIO_PCS_STAT2_10GBR 0x0001 /* 10GBASE-R capable */ 195 #define MDIO_PCS_STAT2_10GBX 0x0002 /* 10GBASE-X capable */ 196 #define MDIO_PCS_STAT2_10GBW 0x0004 /* 10GBASE-W capable */ 197 #define MDIO_PCS_STAT2_RXFLTABLE 0x1000 /* Receive fault ability */ 198 #define MDIO_PCS_STAT2_TXFLTABLE 0x2000 /* Transmit fault ability */ 199 200 /* Transmit disable register. */ 201 #define MDIO_PMD_TXDIS_GLOBAL 0x0001 /* Global PMD TX disable */ 202 #define MDIO_PMD_TXDIS_0 0x0002 /* PMD TX disable 0 */ 203 #define MDIO_PMD_TXDIS_1 0x0004 /* PMD TX disable 1 */ 204 #define MDIO_PMD_TXDIS_2 0x0008 /* PMD TX disable 2 */ 205 #define MDIO_PMD_TXDIS_3 0x0010 /* PMD TX disable 3 */ 206 207 /* Receive signal detect register. */ 208 #define MDIO_PMD_RXDET_GLOBAL 0x0001 /* Global PMD RX signal detect */ 209 #define MDIO_PMD_RXDET_0 0x0002 /* PMD RX signal detect 0 */ 210 #define MDIO_PMD_RXDET_1 0x0004 /* PMD RX signal detect 1 */ 211 #define MDIO_PMD_RXDET_2 0x0008 /* PMD RX signal detect 2 */ 212 #define MDIO_PMD_RXDET_3 0x0010 /* PMD RX signal detect 3 */ 213 214 /* Extended abilities register. */ 215 #define MDIO_PMA_EXTABLE_10GCX4 0x0001 /* 10GBASE-CX4 ability */ 216 #define MDIO_PMA_EXTABLE_10GBLRM 0x0002 /* 10GBASE-LRM ability */ 217 #define MDIO_PMA_EXTABLE_10GBT 0x0004 /* 10GBASE-T ability */ 218 #define MDIO_PMA_EXTABLE_10GBKX4 0x0008 /* 10GBASE-KX4 ability */ 219 #define MDIO_PMA_EXTABLE_10GBKR 0x0010 /* 10GBASE-KR ability */ 220 #define MDIO_PMA_EXTABLE_1000BT 0x0020 /* 1000BASE-T ability */ 221 #define MDIO_PMA_EXTABLE_1000BKX 0x0040 /* 1000BASE-KX ability */ 222 #define MDIO_PMA_EXTABLE_100BTX 0x0080 /* 100BASE-TX ability */ 223 #define MDIO_PMA_EXTABLE_10BT 0x0100 /* 10BASE-T ability */ 224 225 /* PHY XGXS lane state register. */ 226 #define MDIO_PHYXS_LNSTAT_SYNC0 0x0001 227 #define MDIO_PHYXS_LNSTAT_SYNC1 0x0002 228 #define MDIO_PHYXS_LNSTAT_SYNC2 0x0004 229 #define MDIO_PHYXS_LNSTAT_SYNC3 0x0008 230 #define MDIO_PHYXS_LNSTAT_ALIGN 0x1000 231 232 /* PMA 10GBASE-T pair swap & polarity */ 233 #define MDIO_PMA_10GBT_SWAPPOL_ABNX 0x0001 /* Pair A/B uncrossed */ 234 #define MDIO_PMA_10GBT_SWAPPOL_CDNX 0x0002 /* Pair C/D uncrossed */ 235 #define MDIO_PMA_10GBT_SWAPPOL_AREV 0x0100 /* Pair A polarity reversed */ 236 #define MDIO_PMA_10GBT_SWAPPOL_BREV 0x0200 /* Pair B polarity reversed */ 237 #define MDIO_PMA_10GBT_SWAPPOL_CREV 0x0400 /* Pair C polarity reversed */ 238 #define MDIO_PMA_10GBT_SWAPPOL_DREV 0x0800 /* Pair D polarity reversed */ 239 240 /* PMA 10GBASE-T TX power register. */ 241 #define MDIO_PMA_10GBT_TXPWR_SHORT 0x0001 /* Short-reach mode */ 242 243 /* PMA 10GBASE-T SNR registers. */ 244 /* Value is SNR margin in dB, clamped to range [-127, 127], plus 0x8000. */ 245 #define MDIO_PMA_10GBT_SNR_BIAS 0x8000 246 #define MDIO_PMA_10GBT_SNR_MAX 127 247 248 /* PMA 10GBASE-R FEC ability register. */ 249 #define MDIO_PMA_10GBR_FECABLE_ABLE 0x0001 /* FEC ability */ 250 #define MDIO_PMA_10GBR_FECABLE_ERRABLE 0x0002 /* FEC error indic. ability */ 251 252 /* PCS 10GBASE-R/-T status register 1. */ 253 #define MDIO_PCS_10GBRT_STAT1_BLKLK 0x0001 /* Block lock attained */ 254 255 /* PCS 10GBASE-R/-T status register 2. */ 256 #define MDIO_PCS_10GBRT_STAT2_ERR 0x00ff 257 #define MDIO_PCS_10GBRT_STAT2_BER 0x3f00 258 259 /* AN 10GBASE-T control register. */ 260 #define MDIO_AN_10GBT_CTRL_ADV10G 0x1000 /* Advertise 10GBASE-T */ 261 262 /* AN 10GBASE-T status register. */ 263 #define MDIO_AN_10GBT_STAT_LPTRR 0x0200 /* LP training reset req. */ 264 #define MDIO_AN_10GBT_STAT_LPLTABLE 0x0400 /* LP loop timing ability */ 265 #define MDIO_AN_10GBT_STAT_LP10G 0x0800 /* LP is 10GBT capable */ 266 #define MDIO_AN_10GBT_STAT_REMOK 0x1000 /* Remote OK */ 267 #define MDIO_AN_10GBT_STAT_LOCOK 0x2000 /* Local OK */ 268 #define MDIO_AN_10GBT_STAT_MS 0x4000 /* Master/slave config */ 269 #define MDIO_AN_10GBT_STAT_MSFLT 0x8000 /* Master/slave config fault */ 270 271 /* AN EEE Advertisement register. */ 272 #define MDIO_AN_EEE_ADV_100TX 0x0002 /* Advertise 100TX EEE cap */ 273 #define MDIO_AN_EEE_ADV_1000T 0x0004 /* Advertise 1000T EEE cap */ 274 275 /* LASI RX_ALARM control/status registers. */ 276 #define MDIO_PMA_LASI_RX_PHYXSLFLT 0x0001 /* PHY XS RX local fault */ 277 #define MDIO_PMA_LASI_RX_PCSLFLT 0x0008 /* PCS RX local fault */ 278 #define MDIO_PMA_LASI_RX_PMALFLT 0x0010 /* PMA/PMD RX local fault */ 279 #define MDIO_PMA_LASI_RX_OPTICPOWERFLT 0x0020 /* RX optical power fault */ 280 #define MDIO_PMA_LASI_RX_WISLFLT 0x0200 /* WIS local fault */ 281 282 /* LASI TX_ALARM control/status registers. */ 283 #define MDIO_PMA_LASI_TX_PHYXSLFLT 0x0001 /* PHY XS TX local fault */ 284 #define MDIO_PMA_LASI_TX_PCSLFLT 0x0008 /* PCS TX local fault */ 285 #define MDIO_PMA_LASI_TX_PMALFLT 0x0010 /* PMA/PMD TX local fault */ 286 #define MDIO_PMA_LASI_TX_LASERPOWERFLT 0x0080 /* Laser output power fault */ 287 #define MDIO_PMA_LASI_TX_LASERTEMPFLT 0x0100 /* Laser temperature fault */ 288 #define MDIO_PMA_LASI_TX_LASERBICURRFLT 0x0200 /* Laser bias current fault */ 289 290 /* LASI control/status registers. */ 291 #define MDIO_PMA_LASI_LSALARM 0x0001 /* LS_ALARM enable/status */ 292 #define MDIO_PMA_LASI_TXALARM 0x0002 /* TX_ALARM enable/status */ 293 #define MDIO_PMA_LASI_RXALARM 0x0004 /* RX_ALARM enable/status */ 294 295 /* Mapping between MDIO PRTAD/DEVAD and mii_ioctl_data::phy_id */ 296 297 #define MDIO_PHY_ID_C45 0x8000 298 #define MDIO_PHY_ID_PRTAD 0x03e0 299 #define MDIO_PHY_ID_DEVAD 0x001f 300 #define MDIO_PHY_ID_C45_MASK \ 301 (MDIO_PHY_ID_C45 | MDIO_PHY_ID_PRTAD | MDIO_PHY_ID_DEVAD) 302 303 #define MDIO_PRTAD_NONE (-1) 304 #define MDIO_DEVAD_NONE (-1) 305 #define MDIO_EMULATE_C22 4 306 307 #endif /* __SUNXI_HAL_MDIO_H__ */ 308