drivers/net/ethernet/freescale/fec.h

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   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /****************************************************************************/
   3 
   4 /*
   5  *      fec.h  --  Fast Ethernet Controller for Motorola ColdFire SoC
   6  *                 processors.
   7  *
   8  *      (C) Copyright 2000-2005, Greg Ungerer (gerg@snapgear.com)
   9  *      (C) Copyright 2000-2001, Lineo (www.lineo.com)
  10  */
  11 
  12 /****************************************************************************/
  13 #ifndef FEC_H
  14 #define FEC_H
  15 /****************************************************************************/
  16 
  17 #include <linux/clocksource.h>
  18 #include <linux/net_tstamp.h>
  19 #include <linux/ptp_clock_kernel.h>
  20 #include <linux/timecounter.h>
  21 
  22 #if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
  23     defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM) || \
  24     defined(CONFIG_ARM64) || defined(CONFIG_COMPILE_TEST)
  25 /*
  26  *      Just figures, Motorola would have to change the offsets for
  27  *      registers in the same peripheral device on different models
  28  *      of the ColdFire!
  29  */
  30 #define FEC_IEVENT              0x004 /* Interrupt event reg */
  31 #define FEC_IMASK               0x008 /* Interrupt mask reg */
  32 #define FEC_R_DES_ACTIVE_0      0x010 /* Receive descriptor reg */
  33 #define FEC_X_DES_ACTIVE_0      0x014 /* Transmit descriptor reg */
  34 #define FEC_ECNTRL              0x024 /* Ethernet control reg */
  35 #define FEC_MII_DATA            0x040 /* MII manage frame reg */
  36 #define FEC_MII_SPEED           0x044 /* MII speed control reg */
  37 #define FEC_MIB_CTRLSTAT        0x064 /* MIB control/status reg */
  38 #define FEC_R_CNTRL             0x084 /* Receive control reg */
  39 #define FEC_X_CNTRL             0x0c4 /* Transmit Control reg */
  40 #define FEC_ADDR_LOW            0x0e4 /* Low 32bits MAC address */
  41 #define FEC_ADDR_HIGH           0x0e8 /* High 16bits MAC address */
  42 #define FEC_OPD                 0x0ec /* Opcode + Pause duration */
  43 #define FEC_TXIC0               0x0f0 /* Tx Interrupt Coalescing for ring 0 */
  44 #define FEC_TXIC1               0x0f4 /* Tx Interrupt Coalescing for ring 1 */
  45 #define FEC_TXIC2               0x0f8 /* Tx Interrupt Coalescing for ring 2 */
  46 #define FEC_RXIC0               0x100 /* Rx Interrupt Coalescing for ring 0 */
  47 #define FEC_RXIC1               0x104 /* Rx Interrupt Coalescing for ring 1 */
  48 #define FEC_RXIC2               0x108 /* Rx Interrupt Coalescing for ring 2 */
  49 #define FEC_HASH_TABLE_HIGH     0x118 /* High 32bits hash table */
  50 #define FEC_HASH_TABLE_LOW      0x11c /* Low 32bits hash table */
  51 #define FEC_GRP_HASH_TABLE_HIGH 0x120 /* High 32bits hash table */
  52 #define FEC_GRP_HASH_TABLE_LOW  0x124 /* Low 32bits hash table */
  53 #define FEC_X_WMRK              0x144 /* FIFO transmit water mark */
  54 #define FEC_R_BOUND             0x14c /* FIFO receive bound reg */
  55 #define FEC_R_FSTART            0x150 /* FIFO receive start reg */
  56 #define FEC_R_DES_START_1       0x160 /* Receive descriptor ring 1 */
  57 #define FEC_X_DES_START_1       0x164 /* Transmit descriptor ring 1 */
  58 #define FEC_R_BUFF_SIZE_1       0x168 /* Maximum receive buff ring1 size */
  59 #define FEC_R_DES_START_2       0x16c /* Receive descriptor ring 2 */
  60 #define FEC_X_DES_START_2       0x170 /* Transmit descriptor ring 2 */
  61 #define FEC_R_BUFF_SIZE_2       0x174 /* Maximum receive buff ring2 size */
  62 #define FEC_R_DES_START_0       0x180 /* Receive descriptor ring */
  63 #define FEC_X_DES_START_0       0x184 /* Transmit descriptor ring */
  64 #define FEC_R_BUFF_SIZE_0       0x188 /* Maximum receive buff size */
  65 #define FEC_R_FIFO_RSFL         0x190 /* Receive FIFO section full threshold */
  66 #define FEC_R_FIFO_RSEM         0x194 /* Receive FIFO section empty threshold */
  67 #define FEC_R_FIFO_RAEM         0x198 /* Receive FIFO almost empty threshold */
  68 #define FEC_R_FIFO_RAFL         0x19c /* Receive FIFO almost full threshold */
  69 #define FEC_FTRL                0x1b0 /* Frame truncation receive length*/
  70 #define FEC_RACC                0x1c4 /* Receive Accelerator function */
  71 #define FEC_RCMR_1              0x1c8 /* Receive classification match ring 1 */
  72 #define FEC_RCMR_2              0x1cc /* Receive classification match ring 2 */
  73 #define FEC_DMA_CFG_1           0x1d8 /* DMA class configuration for ring 1 */
  74 #define FEC_DMA_CFG_2           0x1dc /* DMA class Configuration for ring 2 */
  75 #define FEC_R_DES_ACTIVE_1      0x1e0 /* Rx descriptor active for ring 1 */
  76 #define FEC_X_DES_ACTIVE_1      0x1e4 /* Tx descriptor active for ring 1 */
  77 #define FEC_R_DES_ACTIVE_2      0x1e8 /* Rx descriptor active for ring 2 */
  78 #define FEC_X_DES_ACTIVE_2      0x1ec /* Tx descriptor active for ring 2 */
  79 #define FEC_QOS_SCHEME          0x1f0 /* Set multi queues Qos scheme */
  80 #define FEC_MIIGSK_CFGR         0x300 /* MIIGSK Configuration reg */
  81 #define FEC_MIIGSK_ENR          0x308 /* MIIGSK Enable reg */
  82 
  83 #define BM_MIIGSK_CFGR_MII              0x00
  84 #define BM_MIIGSK_CFGR_RMII             0x01
  85 #define BM_MIIGSK_CFGR_FRCONT_10M       0x40
  86 
  87 #define RMON_T_DROP             0x200 /* Count of frames not cntd correctly */
  88 #define RMON_T_PACKETS          0x204 /* RMON TX packet count */
  89 #define RMON_T_BC_PKT           0x208 /* RMON TX broadcast pkts */
  90 #define RMON_T_MC_PKT           0x20c /* RMON TX multicast pkts */
  91 #define RMON_T_CRC_ALIGN        0x210 /* RMON TX pkts with CRC align err */
  92 #define RMON_T_UNDERSIZE        0x214 /* RMON TX pkts < 64 bytes, good CRC */
  93 #define RMON_T_OVERSIZE         0x218 /* RMON TX pkts > MAX_FL bytes good CRC */
  94 #define RMON_T_FRAG             0x21c /* RMON TX pkts < 64 bytes, bad CRC */
  95 #define RMON_T_JAB              0x220 /* RMON TX pkts > MAX_FL bytes, bad CRC */
  96 #define RMON_T_COL              0x224 /* RMON TX collision count */
  97 #define RMON_T_P64              0x228 /* RMON TX 64 byte pkts */
  98 #define RMON_T_P65TO127         0x22c /* RMON TX 65 to 127 byte pkts */
  99 #define RMON_T_P128TO255        0x230 /* RMON TX 128 to 255 byte pkts */
 100 #define RMON_T_P256TO511        0x234 /* RMON TX 256 to 511 byte pkts */
 101 #define RMON_T_P512TO1023       0x238 /* RMON TX 512 to 1023 byte pkts */
 102 #define RMON_T_P1024TO2047      0x23c /* RMON TX 1024 to 2047 byte pkts */
 103 #define RMON_T_P_GTE2048        0x240 /* RMON TX pkts > 2048 bytes */
 104 #define RMON_T_OCTETS           0x244 /* RMON TX octets */
 105 #define IEEE_T_DROP             0x248 /* Count of frames not counted crtly */
 106 #define IEEE_T_FRAME_OK         0x24c /* Frames tx'd OK */
 107 #define IEEE_T_1COL             0x250 /* Frames tx'd with single collision */
 108 #define IEEE_T_MCOL             0x254 /* Frames tx'd with multiple collision */
 109 #define IEEE_T_DEF              0x258 /* Frames tx'd after deferral delay */
 110 #define IEEE_T_LCOL             0x25c /* Frames tx'd with late collision */
 111 #define IEEE_T_EXCOL            0x260 /* Frames tx'd with excesv collisions */
 112 #define IEEE_T_MACERR           0x264 /* Frames tx'd with TX FIFO underrun */
 113 #define IEEE_T_CSERR            0x268 /* Frames tx'd with carrier sense err */
 114 #define IEEE_T_SQE              0x26c /* Frames tx'd with SQE err */
 115 #define IEEE_T_FDXFC            0x270 /* Flow control pause frames tx'd */
 116 #define IEEE_T_OCTETS_OK        0x274 /* Octet count for frames tx'd w/o err */
 117 #define RMON_R_PACKETS          0x284 /* RMON RX packet count */
 118 #define RMON_R_BC_PKT           0x288 /* RMON RX broadcast pkts */
 119 #define RMON_R_MC_PKT           0x28c /* RMON RX multicast pkts */
 120 #define RMON_R_CRC_ALIGN        0x290 /* RMON RX pkts with CRC alignment err */
 121 #define RMON_R_UNDERSIZE        0x294 /* RMON RX pkts < 64 bytes, good CRC */
 122 #define RMON_R_OVERSIZE         0x298 /* RMON RX pkts > MAX_FL bytes good CRC */
 123 #define RMON_R_FRAG             0x29c /* RMON RX pkts < 64 bytes, bad CRC */
 124 #define RMON_R_JAB              0x2a0 /* RMON RX pkts > MAX_FL bytes, bad CRC */
 125 #define RMON_R_RESVD_O          0x2a4 /* Reserved */
 126 #define RMON_R_P64              0x2a8 /* RMON RX 64 byte pkts */
 127 #define RMON_R_P65TO127         0x2ac /* RMON RX 65 to 127 byte pkts */
 128 #define RMON_R_P128TO255        0x2b0 /* RMON RX 128 to 255 byte pkts */
 129 #define RMON_R_P256TO511        0x2b4 /* RMON RX 256 to 511 byte pkts */
 130 #define RMON_R_P512TO1023       0x2b8 /* RMON RX 512 to 1023 byte pkts */
 131 #define RMON_R_P1024TO2047      0x2bc /* RMON RX 1024 to 2047 byte pkts */
 132 #define RMON_R_P_GTE2048        0x2c0 /* RMON RX pkts > 2048 bytes */
 133 #define RMON_R_OCTETS           0x2c4 /* RMON RX octets */
 134 #define IEEE_R_DROP             0x2c8 /* Count frames not counted correctly */
 135 #define IEEE_R_FRAME_OK         0x2cc /* Frames rx'd OK */
 136 #define IEEE_R_CRC              0x2d0 /* Frames rx'd with CRC err */
 137 #define IEEE_R_ALIGN            0x2d4 /* Frames rx'd with alignment err */
 138 #define IEEE_R_MACERR           0x2d8 /* Receive FIFO overflow count */
 139 #define IEEE_R_FDXFC            0x2dc /* Flow control pause frames rx'd */
 140 #define IEEE_R_OCTETS_OK        0x2e0 /* Octet cnt for frames rx'd w/o err */
 141 
 142 #else
 143 
 144 #define FEC_ECNTRL              0x000 /* Ethernet control reg */
 145 #define FEC_IEVENT              0x004 /* Interrupt even reg */
 146 #define FEC_IMASK               0x008 /* Interrupt mask reg */
 147 #define FEC_IVEC                0x00c /* Interrupt vec status reg */
 148 #define FEC_R_DES_ACTIVE_0      0x010 /* Receive descriptor reg */
 149 #define FEC_R_DES_ACTIVE_1      FEC_R_DES_ACTIVE_0
 150 #define FEC_R_DES_ACTIVE_2      FEC_R_DES_ACTIVE_0
 151 #define FEC_X_DES_ACTIVE_0      0x014 /* Transmit descriptor reg */
 152 #define FEC_X_DES_ACTIVE_1      FEC_X_DES_ACTIVE_0
 153 #define FEC_X_DES_ACTIVE_2      FEC_X_DES_ACTIVE_0
 154 #define FEC_MII_DATA            0x040 /* MII manage frame reg */
 155 #define FEC_MII_SPEED           0x044 /* MII speed control reg */
 156 #define FEC_R_BOUND             0x08c /* FIFO receive bound reg */
 157 #define FEC_R_FSTART            0x090 /* FIFO receive start reg */
 158 #define FEC_X_WMRK              0x0a4 /* FIFO transmit water mark */
 159 #define FEC_X_FSTART            0x0ac /* FIFO transmit start reg */
 160 #define FEC_R_CNTRL             0x104 /* Receive control reg */
 161 #define FEC_MAX_FRM_LEN         0x108 /* Maximum frame length reg */
 162 #define FEC_X_CNTRL             0x144 /* Transmit Control reg */
 163 #define FEC_ADDR_LOW            0x3c0 /* Low 32bits MAC address */
 164 #define FEC_ADDR_HIGH           0x3c4 /* High 16bits MAC address */
 165 #define FEC_GRP_HASH_TABLE_HIGH 0x3c8 /* High 32bits hash table */
 166 #define FEC_GRP_HASH_TABLE_LOW  0x3cc /* Low 32bits hash table */
 167 #define FEC_R_DES_START_0       0x3d0 /* Receive descriptor ring */
 168 #define FEC_R_DES_START_1       FEC_R_DES_START_0
 169 #define FEC_R_DES_START_2       FEC_R_DES_START_0
 170 #define FEC_X_DES_START_0       0x3d4 /* Transmit descriptor ring */
 171 #define FEC_X_DES_START_1       FEC_X_DES_START_0
 172 #define FEC_X_DES_START_2       FEC_X_DES_START_0
 173 #define FEC_R_BUFF_SIZE_0       0x3d8 /* Maximum receive buff size */
 174 #define FEC_R_BUFF_SIZE_1       FEC_R_BUFF_SIZE_0
 175 #define FEC_R_BUFF_SIZE_2       FEC_R_BUFF_SIZE_0
 176 #define FEC_FIFO_RAM            0x400 /* FIFO RAM buffer */
 177 /* Not existed in real chip
 178  * Just for pass build.
 179  */
 180 #define FEC_RCMR_1              0xfff
 181 #define FEC_RCMR_2              0xfff
 182 #define FEC_DMA_CFG_1           0xfff
 183 #define FEC_DMA_CFG_2           0xfff
 184 #define FEC_TXIC0               0xfff
 185 #define FEC_TXIC1               0xfff
 186 #define FEC_TXIC2               0xfff
 187 #define FEC_RXIC0               0xfff
 188 #define FEC_RXIC1               0xfff
 189 #define FEC_RXIC2               0xfff
 190 #endif /* CONFIG_M5272 */
 191 
 192 
 193 /*
 194  *      Define the buffer descriptor structure.
 195  *
 196  *      Evidently, ARM SoCs have the FEC block generated in a
 197  *      little endian mode so adjust endianness accordingly.
 198  */
 199 #if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
 200 #define fec32_to_cpu le32_to_cpu
 201 #define fec16_to_cpu le16_to_cpu
 202 #define cpu_to_fec32 cpu_to_le32
 203 #define cpu_to_fec16 cpu_to_le16
 204 #define __fec32 __le32
 205 #define __fec16 __le16
 206 
 207 struct bufdesc {
 208         __fec16 cbd_datlen;     /* Data length */
 209         __fec16 cbd_sc;         /* Control and status info */
 210         __fec32 cbd_bufaddr;    /* Buffer address */
 211 };
 212 #else
 213 #define fec32_to_cpu be32_to_cpu
 214 #define fec16_to_cpu be16_to_cpu
 215 #define cpu_to_fec32 cpu_to_be32
 216 #define cpu_to_fec16 cpu_to_be16
 217 #define __fec32 __be32
 218 #define __fec16 __be16
 219 
 220 struct bufdesc {
 221         __fec16 cbd_sc;         /* Control and status info */
 222         __fec16 cbd_datlen;     /* Data length */
 223         __fec32 cbd_bufaddr;    /* Buffer address */
 224 };
 225 #endif
 226 
 227 struct bufdesc_ex {
 228         struct bufdesc desc;
 229         __fec32 cbd_esc;
 230         __fec32 cbd_prot;
 231         __fec32 cbd_bdu;
 232         __fec32 ts;
 233         __fec16 res0[4];
 234 };
 235 
 236 /*
 237  *      The following definitions courtesy of commproc.h, which where
 238  *      Copyright (c) 1997 Dan Malek (dmalek@jlc.net).
 239  */
 240 #define BD_SC_EMPTY     ((ushort)0x8000)        /* Receive is empty */
 241 #define BD_SC_READY     ((ushort)0x8000)        /* Transmit is ready */
 242 #define BD_SC_WRAP      ((ushort)0x2000)        /* Last buffer descriptor */
 243 #define BD_SC_INTRPT    ((ushort)0x1000)        /* Interrupt on change */
 244 #define BD_SC_CM        ((ushort)0x0200)        /* Continuous mode */
 245 #define BD_SC_ID        ((ushort)0x0100)        /* Rec'd too many idles */
 246 #define BD_SC_P         ((ushort)0x0100)        /* xmt preamble */
 247 #define BD_SC_BR        ((ushort)0x0020)        /* Break received */
 248 #define BD_SC_FR        ((ushort)0x0010)        /* Framing error */
 249 #define BD_SC_PR        ((ushort)0x0008)        /* Parity error */
 250 #define BD_SC_OV        ((ushort)0x0002)        /* Overrun */
 251 #define BD_SC_CD        ((ushort)0x0001)        /* ?? */
 252 
 253 /* Buffer descriptor control/status used by Ethernet receive.
 254  */
 255 #define BD_ENET_RX_EMPTY        ((ushort)0x8000)
 256 #define BD_ENET_RX_WRAP         ((ushort)0x2000)
 257 #define BD_ENET_RX_INTR         ((ushort)0x1000)
 258 #define BD_ENET_RX_LAST         ((ushort)0x0800)
 259 #define BD_ENET_RX_FIRST        ((ushort)0x0400)
 260 #define BD_ENET_RX_MISS         ((ushort)0x0100)
 261 #define BD_ENET_RX_LG           ((ushort)0x0020)
 262 #define BD_ENET_RX_NO           ((ushort)0x0010)
 263 #define BD_ENET_RX_SH           ((ushort)0x0008)
 264 #define BD_ENET_RX_CR           ((ushort)0x0004)
 265 #define BD_ENET_RX_OV           ((ushort)0x0002)
 266 #define BD_ENET_RX_CL           ((ushort)0x0001)
 267 #define BD_ENET_RX_STATS        ((ushort)0x013f)        /* All status bits */
 268 
 269 /* Enhanced buffer descriptor control/status used by Ethernet receive */
 270 #define BD_ENET_RX_VLAN         0x00000004
 271 
 272 /* Buffer descriptor control/status used by Ethernet transmit.
 273  */
 274 #define BD_ENET_TX_READY        ((ushort)0x8000)
 275 #define BD_ENET_TX_PAD          ((ushort)0x4000)
 276 #define BD_ENET_TX_WRAP         ((ushort)0x2000)
 277 #define BD_ENET_TX_INTR         ((ushort)0x1000)
 278 #define BD_ENET_TX_LAST         ((ushort)0x0800)
 279 #define BD_ENET_TX_TC           ((ushort)0x0400)
 280 #define BD_ENET_TX_DEF          ((ushort)0x0200)
 281 #define BD_ENET_TX_HB           ((ushort)0x0100)
 282 #define BD_ENET_TX_LC           ((ushort)0x0080)
 283 #define BD_ENET_TX_RL           ((ushort)0x0040)
 284 #define BD_ENET_TX_RCMASK       ((ushort)0x003c)
 285 #define BD_ENET_TX_UN           ((ushort)0x0002)
 286 #define BD_ENET_TX_CSL          ((ushort)0x0001)
 287 #define BD_ENET_TX_STATS        ((ushort)0x0fff)        /* All status bits */
 288 
 289 /* enhanced buffer descriptor control/status used by Ethernet transmit */
 290 #define BD_ENET_TX_INT          0x40000000
 291 #define BD_ENET_TX_TS           0x20000000
 292 #define BD_ENET_TX_PINS         0x10000000
 293 #define BD_ENET_TX_IINS         0x08000000
 294 
 295 
 296 /* This device has up to three irqs on some platforms */
 297 #define FEC_IRQ_NUM             3
 298 
 299 /* Maximum number of queues supported
 300  * ENET with AVB IP can support up to 3 independent tx queues and rx queues.
 301  * User can point the queue number that is less than or equal to 3.
 302  */
 303 #define FEC_ENET_MAX_TX_QS      3
 304 #define FEC_ENET_MAX_RX_QS      3
 305 
 306 #define FEC_R_DES_START(X)      (((X) == 1) ? FEC_R_DES_START_1 : \
 307                                 (((X) == 2) ? \
 308                                         FEC_R_DES_START_2 : FEC_R_DES_START_0))
 309 #define FEC_X_DES_START(X)      (((X) == 1) ? FEC_X_DES_START_1 : \
 310                                 (((X) == 2) ? \
 311                                         FEC_X_DES_START_2 : FEC_X_DES_START_0))
 312 #define FEC_R_BUFF_SIZE(X)      (((X) == 1) ? FEC_R_BUFF_SIZE_1 : \
 313                                 (((X) == 2) ? \
 314                                         FEC_R_BUFF_SIZE_2 : FEC_R_BUFF_SIZE_0))
 315 
 316 #define FEC_DMA_CFG(X)          (((X) == 2) ? FEC_DMA_CFG_2 : FEC_DMA_CFG_1)
 317 
 318 #define DMA_CLASS_EN            (1 << 16)
 319 #define FEC_RCMR(X)             (((X) == 2) ? FEC_RCMR_2 : FEC_RCMR_1)
 320 #define IDLE_SLOPE_MASK         0xffff
 321 #define IDLE_SLOPE_1            0x200 /* BW fraction: 0.5 */
 322 #define IDLE_SLOPE_2            0x200 /* BW fraction: 0.5 */
 323 #define IDLE_SLOPE(X)           (((X) == 1) ?                           \
 324                                 (IDLE_SLOPE_1 & IDLE_SLOPE_MASK) :      \
 325                                 (IDLE_SLOPE_2 & IDLE_SLOPE_MASK))
 326 #define RCMR_MATCHEN            (0x1 << 16)
 327 #define RCMR_CMP_CFG(v, n)      (((v) & 0x7) <<  (n << 2))
 328 #define RCMR_CMP_1              (RCMR_CMP_CFG(0, 0) | RCMR_CMP_CFG(1, 1) | \
 329                                 RCMR_CMP_CFG(2, 2) | RCMR_CMP_CFG(3, 3))
 330 #define RCMR_CMP_2              (RCMR_CMP_CFG(4, 0) | RCMR_CMP_CFG(5, 1) | \
 331                                 RCMR_CMP_CFG(6, 2) | RCMR_CMP_CFG(7, 3))
 332 #define RCMR_CMP(X)             (((X) == 1) ? RCMR_CMP_1 : RCMR_CMP_2)
 333 #define FEC_TX_BD_FTYPE(X)      (((X) & 0xf) << 20)
 334 
 335 /* The number of Tx and Rx buffers.  These are allocated from the page
 336  * pool.  The code may assume these are power of two, so it it best
 337  * to keep them that size.
 338  * We don't need to allocate pages for the transmitter.  We just use
 339  * the skbuffer directly.
 340  */
 341 
 342 #define FEC_ENET_RX_PAGES       256
 343 #define FEC_ENET_RX_FRSIZE      2048
 344 #define FEC_ENET_RX_FRPPG       (PAGE_SIZE / FEC_ENET_RX_FRSIZE)
 345 #define RX_RING_SIZE            (FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
 346 #define FEC_ENET_TX_FRSIZE      2048
 347 #define FEC_ENET_TX_FRPPG       (PAGE_SIZE / FEC_ENET_TX_FRSIZE)
 348 #define TX_RING_SIZE            512     /* Must be power of two */
 349 #define TX_RING_MOD_MASK        511     /*   for this to work */
 350 
 351 #define BD_ENET_RX_INT          0x00800000
 352 #define BD_ENET_RX_PTP          ((ushort)0x0400)
 353 #define BD_ENET_RX_ICE          0x00000020
 354 #define BD_ENET_RX_PCR          0x00000010
 355 #define FLAG_RX_CSUM_ENABLED    (BD_ENET_RX_ICE | BD_ENET_RX_PCR)
 356 #define FLAG_RX_CSUM_ERROR      (BD_ENET_RX_ICE | BD_ENET_RX_PCR)
 357 
 358 /* Interrupt events/masks. */
 359 #define FEC_ENET_HBERR  ((uint)0x80000000)      /* Heartbeat error */
 360 #define FEC_ENET_BABR   ((uint)0x40000000)      /* Babbling receiver */
 361 #define FEC_ENET_BABT   ((uint)0x20000000)      /* Babbling transmitter */
 362 #define FEC_ENET_GRA    ((uint)0x10000000)      /* Graceful stop complete */
 363 #define FEC_ENET_TXF_0  ((uint)0x08000000)      /* Full frame transmitted */
 364 #define FEC_ENET_TXF_1  ((uint)0x00000008)      /* Full frame transmitted */
 365 #define FEC_ENET_TXF_2  ((uint)0x00000080)      /* Full frame transmitted */
 366 #define FEC_ENET_TXB    ((uint)0x04000000)      /* A buffer was transmitted */
 367 #define FEC_ENET_RXF_0  ((uint)0x02000000)      /* Full frame received */
 368 #define FEC_ENET_RXF_1  ((uint)0x00000002)      /* Full frame received */
 369 #define FEC_ENET_RXF_2  ((uint)0x00000020)      /* Full frame received */
 370 #define FEC_ENET_RXB    ((uint)0x01000000)      /* A buffer was received */
 371 #define FEC_ENET_MII    ((uint)0x00800000)      /* MII interrupt */
 372 #define FEC_ENET_EBERR  ((uint)0x00400000)      /* SDMA bus error */
 373 #define FEC_ENET_WAKEUP ((uint)0x00020000)      /* Wakeup request */
 374 #define FEC_ENET_TXF    (FEC_ENET_TXF_0 | FEC_ENET_TXF_1 | FEC_ENET_TXF_2)
 375 #define FEC_ENET_RXF    (FEC_ENET_RXF_0 | FEC_ENET_RXF_1 | FEC_ENET_RXF_2)
 376 #define FEC_ENET_TS_AVAIL       ((uint)0x00010000)
 377 #define FEC_ENET_TS_TIMER       ((uint)0x00008000)
 378 
 379 #define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII)
 380 #define FEC_NAPI_IMASK  FEC_ENET_MII
 381 #define FEC_RX_DISABLED_IMASK (FEC_DEFAULT_IMASK & (~FEC_ENET_RXF))
 382 
 383 /* ENET interrupt coalescing macro define */
 384 #define FEC_ITR_CLK_SEL         (0x1 << 30)
 385 #define FEC_ITR_EN              (0x1 << 31)
 386 #define FEC_ITR_ICFT(X)         (((X) & 0xff) << 20)
 387 #define FEC_ITR_ICTT(X)         ((X) & 0xffff)
 388 #define FEC_ITR_ICFT_DEFAULT    200  /* Set 200 frame count threshold */
 389 #define FEC_ITR_ICTT_DEFAULT    1000 /* Set 1000us timer threshold */
 390 
 391 #define FEC_VLAN_TAG_LEN        0x04
 392 #define FEC_ETHTYPE_LEN         0x02
 393 
 394 /* Controller is ENET-MAC */
 395 #define FEC_QUIRK_ENET_MAC              (1 << 0)
 396 /* Controller needs driver to swap frame */
 397 #define FEC_QUIRK_SWAP_FRAME            (1 << 1)
 398 /* Controller uses gasket */
 399 #define FEC_QUIRK_USE_GASKET            (1 << 2)
 400 /* Controller has GBIT support */
 401 #define FEC_QUIRK_HAS_GBIT              (1 << 3)
 402 /* Controller has extend desc buffer */
 403 #define FEC_QUIRK_HAS_BUFDESC_EX        (1 << 4)
 404 /* Controller has hardware checksum support */
 405 #define FEC_QUIRK_HAS_CSUM              (1 << 5)
 406 /* Controller has hardware vlan support */
 407 #define FEC_QUIRK_HAS_VLAN              (1 << 6)
 408 /* ENET IP errata ERR006358
 409  *
 410  * If the ready bit in the transmit buffer descriptor (TxBD[R]) is previously
 411  * detected as not set during a prior frame transmission, then the
 412  * ENET_TDAR[TDAR] bit is cleared at a later time, even if additional TxBDs
 413  * were added to the ring and the ENET_TDAR[TDAR] bit is set. This results in
 414  * frames not being transmitted until there is a 0-to-1 transition on
 415  * ENET_TDAR[TDAR].
 416  */
 417 #define FEC_QUIRK_ERR006358             (1 << 7)
 418 /* ENET IP hw AVB
 419  *
 420  * i.MX6SX ENET IP add Audio Video Bridging (AVB) feature support.
 421  * - Two class indicators on receive with configurable priority
 422  * - Two class indicators and line speed timer on transmit allowing
 423  *   implementation class credit based shapers externally
 424  * - Additional DMA registers provisioned to allow managing up to 3
 425  *   independent rings
 426  */
 427 #define FEC_QUIRK_HAS_AVB               (1 << 8)
 428 /* There is a TDAR race condition for mutliQ when the software sets TDAR
 429  * and the UDMA clears TDAR simultaneously or in a small window (2-4 cycles).
 430  * This will cause the udma_tx and udma_tx_arbiter state machines to hang.
 431  * The issue exist at i.MX6SX enet IP.
 432  */
 433 #define FEC_QUIRK_ERR007885             (1 << 9)
 434 /* ENET Block Guide/ Chapter for the iMX6SX (PELE) address one issue:
 435  * After set ENET_ATCR[Capture], there need some time cycles before the counter
 436  * value is capture in the register clock domain.
 437  * The wait-time-cycles is at least 6 clock cycles of the slower clock between
 438  * the register clock and the 1588 clock. The 1588 ts_clk is fixed to 25Mhz,
 439  * register clock is 66Mhz, so the wait-time-cycles must be greater than 240ns
 440  * (40ns * 6).
 441  */
 442 #define FEC_QUIRK_BUG_CAPTURE           (1 << 10)
 443 /* Controller has only one MDIO bus */
 444 #define FEC_QUIRK_SINGLE_MDIO           (1 << 11)
 445 /* Controller supports RACC register */
 446 #define FEC_QUIRK_HAS_RACC              (1 << 12)
 447 /* Controller supports interrupt coalesc */
 448 #define FEC_QUIRK_HAS_COALESCE          (1 << 13)
 449 /* Interrupt doesn't wake CPU from deep idle */
 450 #define FEC_QUIRK_ERR006687             (1 << 14)
 451 /* The MIB counters should be cleared and enabled during
 452  * initialisation.
 453  */
 454 #define FEC_QUIRK_MIB_CLEAR             (1 << 15)
 455 /* Only i.MX25/i.MX27/i.MX28 controller supports FRBR,FRSR registers,
 456  * those FIFO receive registers are resolved in other platforms.
 457  */
 458 #define FEC_QUIRK_HAS_FRREG             (1 << 16)
 459 
 460 struct bufdesc_prop {
 461         int qid;
 462         /* Address of Rx and Tx buffers */
 463         struct bufdesc  *base;
 464         struct bufdesc  *last;
 465         struct bufdesc  *cur;
 466         void __iomem    *reg_desc_active;
 467         dma_addr_t      dma;
 468         unsigned short ring_size;
 469         unsigned char dsize;
 470         unsigned char dsize_log2;
 471 };
 472 
 473 struct fec_enet_priv_tx_q {
 474         struct bufdesc_prop bd;
 475         unsigned char *tx_bounce[TX_RING_SIZE];
 476         struct  sk_buff *tx_skbuff[TX_RING_SIZE];
 477 
 478         unsigned short tx_stop_threshold;
 479         unsigned short tx_wake_threshold;
 480 
 481         struct bufdesc  *dirty_tx;
 482         char *tso_hdrs;
 483         dma_addr_t tso_hdrs_dma;
 484 };
 485 
 486 struct fec_enet_priv_rx_q {
 487         struct bufdesc_prop bd;
 488         struct  sk_buff *rx_skbuff[RX_RING_SIZE];
 489 };
 490 
 491 struct fec_stop_mode_gpr {
 492         struct regmap *gpr;
 493         u8 reg;
 494         u8 bit;
 495 };
 496 
 497 /* The FEC buffer descriptors track the ring buffers.  The rx_bd_base and
 498  * tx_bd_base always point to the base of the buffer descriptors.  The
 499  * cur_rx and cur_tx point to the currently available buffer.
 500  * The dirty_tx tracks the current buffer that is being sent by the
 501  * controller.  The cur_tx and dirty_tx are equal under both completely
 502  * empty and completely full conditions.  The empty/ready indicator in
 503  * the buffer descriptor determines the actual condition.
 504  */
 505 struct fec_enet_private {
 506         /* Hardware registers of the FEC device */
 507         void __iomem *hwp;
 508 
 509         struct net_device *netdev;
 510 
 511         struct clk *clk_ipg;
 512         struct clk *clk_ahb;
 513         struct clk *clk_ref;
 514         struct clk *clk_enet_out;
 515         struct clk *clk_ptp;
 516 
 517         bool ptp_clk_on;
 518         struct mutex ptp_clk_mutex;
 519         unsigned int num_tx_queues;
 520         unsigned int num_rx_queues;
 521 
 522         /* The saved address of a sent-in-place packet/buffer, for skfree(). */
 523         struct fec_enet_priv_tx_q *tx_queue[FEC_ENET_MAX_TX_QS];
 524         struct fec_enet_priv_rx_q *rx_queue[FEC_ENET_MAX_RX_QS];
 525 
 526         unsigned int total_tx_ring_size;
 527         unsigned int total_rx_ring_size;
 528 
 529         unsigned long work_tx;
 530         unsigned long work_rx;
 531         unsigned long work_ts;
 532         unsigned long work_mdio;
 533 
 534         struct  platform_device *pdev;
 535 
 536         int     dev_id;
 537 
 538         /* Phylib and MDIO interface */
 539         struct  mii_bus *mii_bus;
 540         uint    phy_speed;
 541         phy_interface_t phy_interface;
 542         struct device_node *phy_node;
 543         int     link;
 544         int     full_duplex;
 545         int     speed;
 546         struct  completion mdio_done;
 547         int     irq[FEC_IRQ_NUM];
 548         bool    bufdesc_ex;
 549         int     pause_flag;
 550         int     wol_flag;
 551         u32     quirks;
 552 
 553         struct  napi_struct napi;
 554         int     csum_flags;
 555 
 556         struct work_struct tx_timeout_work;
 557 
 558         struct ptp_clock *ptp_clock;
 559         struct ptp_clock_info ptp_caps;
 560         unsigned long last_overflow_check;
 561         spinlock_t tmreg_lock;
 562         struct cyclecounter cc;
 563         struct timecounter tc;
 564         int rx_hwtstamp_filter;
 565         u32 base_incval;
 566         u32 cycle_speed;
 567         int hwts_rx_en;
 568         int hwts_tx_en;
 569         struct delayed_work time_keep;
 570         struct regulator *reg_phy;
 571         struct fec_stop_mode_gpr stop_gpr;
 572 
 573         unsigned int tx_align;
 574         unsigned int rx_align;
 575 
 576         /* hw interrupt coalesce */
 577         unsigned int rx_pkts_itr;
 578         unsigned int rx_time_itr;
 579         unsigned int tx_pkts_itr;
 580         unsigned int tx_time_itr;
 581         unsigned int itr_clk_rate;
 582 
 583         u32 rx_copybreak;
 584 
 585         /* ptp clock period in ns*/
 586         unsigned int ptp_inc;
 587 
 588         /* pps  */
 589         int pps_channel;
 590         unsigned int reload_period;
 591         int pps_enable;
 592         unsigned int next_counter;
 593 
 594         u64 ethtool_stats[0];
 595 };
 596 
 597 void fec_ptp_init(struct platform_device *pdev, int irq_idx);
 598 void fec_ptp_stop(struct platform_device *pdev);
 599 void fec_ptp_start_cyclecounter(struct net_device *ndev);
 600 int fec_ptp_set(struct net_device *ndev, struct ifreq *ifr);
 601 int fec_ptp_get(struct net_device *ndev, struct ifreq *ifr);
 602 
 603 /****************************************************************************/
 604 #endif /* FEC_H */
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root/drivers/net/ethernet/freescale/fec.h

INCLUDED FROM
