drivers/net/ethernet/ti/cpsw.c

   1 /*
   2  * Texas Instruments Ethernet Switch Driver
   3  *
   4  * Copyright (C) 2012 Texas Instruments
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation version 2.
   9  *
  10  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  11  * kind, whether express or implied; without even the implied warranty
  12  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/io.h>
  18 #include <linux/clk.h>
  19 #include <linux/timer.h>
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/irqreturn.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/if_ether.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/netdevice.h>
  27 #include <linux/net_tstamp.h>
  28 #include <linux/phy.h>
  29 #include <linux/workqueue.h>
  30 #include <linux/delay.h>
  31 #include <linux/pm_runtime.h>
  32 #include <linux/of.h>
  33 #include <linux/of_net.h>
  34 #include <linux/of_device.h>
  35 #include <linux/if_vlan.h>
  36
  37 #include <linux/pinctrl/consumer.h>
  38
  39 #include "cpsw.h"
  40 #include "cpsw_ale.h"
  41 #include "cpts.h"
  42 #include "davinci_cpdma.h"
  43
  44 #define CPSW_DEBUG      (NETIF_MSG_HW           | NETIF_MSG_WOL         | \
  45                          NETIF_MSG_DRV          | NETIF_MSG_LINK        | \
  46                          NETIF_MSG_IFUP         | NETIF_MSG_INTR        | \
  47                          NETIF_MSG_PROBE        | NETIF_MSG_TIMER       | \
  48                          NETIF_MSG_IFDOWN       | NETIF_MSG_RX_ERR      | \
  49                          NETIF_MSG_TX_ERR       | NETIF_MSG_TX_DONE     | \
  50                          NETIF_MSG_PKTDATA      | NETIF_MSG_TX_QUEUED   | \
  51                          NETIF_MSG_RX_STATUS)
  52
  53 #define cpsw_info(priv, type, format, ...)              \
  54 do {                                                            \
  55         if (netif_msg_##type(priv) && net_ratelimit())          \
  56                 dev_info(priv->dev, format, ## __VA_ARGS__);    \
  57 } while (0)
  58
  59 #define cpsw_err(priv, type, format, ...)               \
  60 do {                                                            \
  61         if (netif_msg_##type(priv) && net_ratelimit())          \
  62                 dev_err(priv->dev, format, ## __VA_ARGS__);     \
  63 } while (0)
  64
  65 #define cpsw_dbg(priv, type, format, ...)               \
  66 do {                                                            \
  67         if (netif_msg_##type(priv) && net_ratelimit())          \
  68                 dev_dbg(priv->dev, format, ## __VA_ARGS__);     \
  69 } while (0)
  70
  71 #define cpsw_notice(priv, type, format, ...)            \
  72 do {                                                            \
  73         if (netif_msg_##type(priv) && net_ratelimit())          \
  74                 dev_notice(priv->dev, format, ## __VA_ARGS__);  \
  75 } while (0)
  76
  77 #define ALE_ALL_PORTS           0x7
  78
  79 #define CPSW_MAJOR_VERSION(reg)         (reg >> 8 & 0x7)
  80 #define CPSW_MINOR_VERSION(reg)         (reg & 0xff)
  81 #define CPSW_RTL_VERSION(reg)           ((reg >> 11) & 0x1f)
  82
  83 #define CPSW_VERSION_1          0x19010a
  84 #define CPSW_VERSION_2          0x19010c
  85 #define CPSW_VERSION_3          0x19010f
  86 #define CPSW_VERSION_4          0x190112
  87
  88 #define HOST_PORT_NUM           0
  89 #define SLIVER_SIZE             0x40
  90
  91 #define CPSW1_HOST_PORT_OFFSET  0x028
  92 #define CPSW1_SLAVE_OFFSET      0x050
  93 #define CPSW1_SLAVE_SIZE        0x040
  94 #define CPSW1_CPDMA_OFFSET      0x100
  95 #define CPSW1_STATERAM_OFFSET   0x200
  96 #define CPSW1_HW_STATS          0x400
  97 #define CPSW1_CPTS_OFFSET       0x500
  98 #define CPSW1_ALE_OFFSET        0x600
  99 #define CPSW1_SLIVER_OFFSET     0x700
 100
 101 #define CPSW2_HOST_PORT_OFFSET  0x108
 102 #define CPSW2_SLAVE_OFFSET      0x200
 103 #define CPSW2_SLAVE_SIZE        0x100
 104 #define CPSW2_CPDMA_OFFSET      0x800
 105 #define CPSW2_HW_STATS          0x900
 106 #define CPSW2_STATERAM_OFFSET   0xa00
 107 #define CPSW2_CPTS_OFFSET       0xc00
 108 #define CPSW2_ALE_OFFSET        0xd00
 109 #define CPSW2_SLIVER_OFFSET     0xd80
 110 #define CPSW2_BD_OFFSET         0x2000
 111
 112 #define CPDMA_RXTHRESH          0x0c0
 113 #define CPDMA_RXFREE            0x0e0
 114 #define CPDMA_TXHDP             0x00
 115 #define CPDMA_RXHDP             0x20
 116 #define CPDMA_TXCP              0x40
 117 #define CPDMA_RXCP              0x60
 118
 119 #define CPSW_POLL_WEIGHT        64
 120 #define CPSW_MIN_PACKET_SIZE    60
 121 #define CPSW_MAX_PACKET_SIZE    (1500 + 14 + 4 + 4)
 122
 123 #define RX_PRIORITY_MAPPING     0x76543210
 124 #define TX_PRIORITY_MAPPING     0x33221100
 125 #define CPDMA_TX_PRIORITY_MAP   0x76543210
 126
 127 #define CPSW_VLAN_AWARE         BIT(1)
 128 #define CPSW_ALE_VLAN_AWARE     1
 129
 130 #define CPSW_FIFO_NORMAL_MODE           (0 << 16)
 131 #define CPSW_FIFO_DUAL_MAC_MODE         (1 << 16)
 132 #define CPSW_FIFO_RATE_LIMIT_MODE       (2 << 16)
 133
 134 #define CPSW_INTPACEEN          (0x3f << 16)
 135 #define CPSW_INTPRESCALE_MASK   (0x7FF << 0)
 136 #define CPSW_CMINTMAX_CNT       63
 137 #define CPSW_CMINTMIN_CNT       2
 138 #define CPSW_CMINTMAX_INTVL     (1000 / CPSW_CMINTMIN_CNT)
 139 #define CPSW_CMINTMIN_INTVL     ((1000 / CPSW_CMINTMAX_CNT) + 1)
 140
 141 #define cpsw_slave_index(priv)                          \
 142                 ((priv->data.dual_emac) ? priv->emac_port :     \
 143                 priv->data.active_slave)
 144
 145 static int debug_level;
 146 module_param(debug_level, int, 0);
 147 MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
 148
 149 static int ale_ageout = 10;
 150 module_param(ale_ageout, int, 0);
 151 MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
 152
 153 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
 154 module_param(rx_packet_max, int, 0);
 155 MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
 156
 157 struct cpsw_wr_regs {
 158         u32     id_ver;
 159         u32     soft_reset;
 160         u32     control;
 161         u32     int_control;
 162         u32     rx_thresh_en;
 163         u32     rx_en;
 164         u32     tx_en;
 165         u32     misc_en;
 166         u32     mem_allign1[8];
 167         u32     rx_thresh_stat;
 168         u32     rx_stat;
 169         u32     tx_stat;
 170         u32     misc_stat;
 171         u32     mem_allign2[8];
 172         u32     rx_imax;
 173         u32     tx_imax;
 174
 175 };
 176
 177 struct cpsw_ss_regs {
 178         u32     id_ver;
 179         u32     control;
 180         u32     soft_reset;
 181         u32     stat_port_en;
 182         u32     ptype;
 183         u32     soft_idle;
 184         u32     thru_rate;
 185         u32     gap_thresh;
 186         u32     tx_start_wds;
 187         u32     flow_control;
 188         u32     vlan_ltype;
 189         u32     ts_ltype;
 190         u32     dlr_ltype;
 191 };
 192
 193 /* CPSW_PORT_V1 */
 194 #define CPSW1_MAX_BLKS      0x00 /* Maximum FIFO Blocks */
 195 #define CPSW1_BLK_CNT       0x04 /* FIFO Block Usage Count (Read Only) */
 196 #define CPSW1_TX_IN_CTL     0x08 /* Transmit FIFO Control */
 197 #define CPSW1_PORT_VLAN     0x0c /* VLAN Register */
 198 #define CPSW1_TX_PRI_MAP    0x10 /* Tx Header Priority to Switch Pri Mapping */
 199 #define CPSW1_TS_CTL        0x14 /* Time Sync Control */
 200 #define CPSW1_TS_SEQ_LTYPE  0x18 /* Time Sync Sequence ID Offset and Msg Type */
 201 #define CPSW1_TS_VLAN       0x1c /* Time Sync VLAN1 and VLAN2 */
 202
 203 /* CPSW_PORT_V2 */
 204 #define CPSW2_CONTROL       0x00 /* Control Register */
 205 #define CPSW2_MAX_BLKS      0x08 /* Maximum FIFO Blocks */
 206 #define CPSW2_BLK_CNT       0x0c /* FIFO Block Usage Count (Read Only) */
 207 #define CPSW2_TX_IN_CTL     0x10 /* Transmit FIFO Control */
 208 #define CPSW2_PORT_VLAN     0x14 /* VLAN Register */
 209 #define CPSW2_TX_PRI_MAP    0x18 /* Tx Header Priority to Switch Pri Mapping */
 210 #define CPSW2_TS_SEQ_MTYPE  0x1c /* Time Sync Sequence ID Offset and Msg Type */
 211
 212 /* CPSW_PORT_V1 and V2 */
 213 #define SA_LO               0x20 /* CPGMAC_SL Source Address Low */
 214 #define SA_HI               0x24 /* CPGMAC_SL Source Address High */
 215 #define SEND_PERCENT        0x28 /* Transmit Queue Send Percentages */
 216
 217 /* CPSW_PORT_V2 only */
 218 #define RX_DSCP_PRI_MAP0    0x30 /* Rx DSCP Priority to Rx Packet Mapping */
 219 #define RX_DSCP_PRI_MAP1    0x34 /* Rx DSCP Priority to Rx Packet Mapping */
 220 #define RX_DSCP_PRI_MAP2    0x38 /* Rx DSCP Priority to Rx Packet Mapping */
 221 #define RX_DSCP_PRI_MAP3    0x3c /* Rx DSCP Priority to Rx Packet Mapping */
 222 #define RX_DSCP_PRI_MAP4    0x40 /* Rx DSCP Priority to Rx Packet Mapping */
 223 #define RX_DSCP_PRI_MAP5    0x44 /* Rx DSCP Priority to Rx Packet Mapping */
 224 #define RX_DSCP_PRI_MAP6    0x48 /* Rx DSCP Priority to Rx Packet Mapping */
 225 #define RX_DSCP_PRI_MAP7    0x4c /* Rx DSCP Priority to Rx Packet Mapping */
 226
 227 /* Bit definitions for the CPSW2_CONTROL register */
 228 #define PASS_PRI_TAGGED     (1<<24) /* Pass Priority Tagged */
 229 #define VLAN_LTYPE2_EN      (1<<21) /* VLAN LTYPE 2 enable */
 230 #define VLAN_LTYPE1_EN      (1<<20) /* VLAN LTYPE 1 enable */
 231 #define DSCP_PRI_EN         (1<<16) /* DSCP Priority Enable */
 232 #define TS_320              (1<<14) /* Time Sync Dest Port 320 enable */
 233 #define TS_319              (1<<13) /* Time Sync Dest Port 319 enable */
 234 #define TS_132              (1<<12) /* Time Sync Dest IP Addr 132 enable */
 235 #define TS_131              (1<<11) /* Time Sync Dest IP Addr 131 enable */
 236 #define TS_130              (1<<10) /* Time Sync Dest IP Addr 130 enable */
 237 #define TS_129              (1<<9)  /* Time Sync Dest IP Addr 129 enable */
 238 #define TS_TTL_NONZERO      (1<<8)  /* Time Sync Time To Live Non-zero enable */
 239 #define TS_ANNEX_F_EN       (1<<6)  /* Time Sync Annex F enable */
 240 #define TS_ANNEX_D_EN       (1<<4)  /* Time Sync Annex D enable */
 241 #define TS_LTYPE2_EN        (1<<3)  /* Time Sync LTYPE 2 enable */
 242 #define TS_LTYPE1_EN        (1<<2)  /* Time Sync LTYPE 1 enable */
 243 #define TS_TX_EN            (1<<1)  /* Time Sync Transmit Enable */
 244 #define TS_RX_EN            (1<<0)  /* Time Sync Receive Enable */
 245
 246 #define CTRL_V2_TS_BITS \
 247         (TS_320 | TS_319 | TS_132 | TS_131 | TS_130 | TS_129 |\
 248          TS_TTL_NONZERO  | TS_ANNEX_D_EN | TS_LTYPE1_EN)
 249
 250 #define CTRL_V2_ALL_TS_MASK (CTRL_V2_TS_BITS | TS_TX_EN | TS_RX_EN)
 251 #define CTRL_V2_TX_TS_BITS  (CTRL_V2_TS_BITS | TS_TX_EN)
 252 #define CTRL_V2_RX_TS_BITS  (CTRL_V2_TS_BITS | TS_RX_EN)
 253
 254
 255 #define CTRL_V3_TS_BITS \
 256         (TS_320 | TS_319 | TS_132 | TS_131 | TS_130 | TS_129 |\
 257          TS_TTL_NONZERO | TS_ANNEX_F_EN | TS_ANNEX_D_EN |\
 258          TS_LTYPE1_EN)
 259
 260 #define CTRL_V3_ALL_TS_MASK (CTRL_V3_TS_BITS | TS_TX_EN | TS_RX_EN)
 261 #define CTRL_V3_TX_TS_BITS  (CTRL_V3_TS_BITS | TS_TX_EN)
 262 #define CTRL_V3_RX_TS_BITS  (CTRL_V3_TS_BITS | TS_RX_EN)
 263
 264 /* Bit definitions for the CPSW2_TS_SEQ_MTYPE register */
 265 #define TS_SEQ_ID_OFFSET_SHIFT   (16)    /* Time Sync Sequence ID Offset */
 266 #define TS_SEQ_ID_OFFSET_MASK    (0x3f)
 267 #define TS_MSG_TYPE_EN_SHIFT     (0)     /* Time Sync Message Type Enable */
 268 #define TS_MSG_TYPE_EN_MASK      (0xffff)
 269
 270 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
 271 #define EVENT_MSG_BITS ((1<<0) | (1<<1) | (1<<2) | (1<<3))
 272
 273 /* Bit definitions for the CPSW1_TS_CTL register */
 274 #define CPSW_V1_TS_RX_EN                BIT(0)
 275 #define CPSW_V1_TS_TX_EN                BIT(4)
 276 #define CPSW_V1_MSG_TYPE_OFS            16
 277
 278 /* Bit definitions for the CPSW1_TS_SEQ_LTYPE register */
 279 #define CPSW_V1_SEQ_ID_OFS_SHIFT        16
 280
 281 struct cpsw_host_regs {
 282         u32     max_blks;
 283         u32     blk_cnt;
 284         u32     tx_in_ctl;
 285         u32     port_vlan;
 286         u32     tx_pri_map;
 287         u32     cpdma_tx_pri_map;
 288         u32     cpdma_rx_chan_map;
 289 };
 290
 291 struct cpsw_sliver_regs {
 292         u32     id_ver;
 293         u32     mac_control;
 294         u32     mac_status;
 295         u32     soft_reset;
 296         u32     rx_maxlen;
 297         u32     __reserved_0;
 298         u32     rx_pause;
 299         u32     tx_pause;
 300         u32     __reserved_1;
 301         u32     rx_pri_map;
 302 };
 303
 304 struct cpsw_hw_stats {
 305         u32     rxgoodframes;
 306         u32     rxbroadcastframes;
 307         u32     rxmulticastframes;
 308         u32     rxpauseframes;
 309         u32     rxcrcerrors;
 310         u32     rxaligncodeerrors;
 311         u32     rxoversizedframes;
 312         u32     rxjabberframes;
 313         u32     rxundersizedframes;
 314         u32     rxfragments;
 315         u32     __pad_0[2];
 316         u32     rxoctets;
 317         u32     txgoodframes;
 318         u32     txbroadcastframes;
 319         u32     txmulticastframes;
 320         u32     txpauseframes;
 321         u32     txdeferredframes;
 322         u32     txcollisionframes;
 323         u32     txsinglecollframes;
 324         u32     txmultcollframes;
 325         u32     txexcessivecollisions;
 326         u32     txlatecollisions;
 327         u32     txunderrun;
 328         u32     txcarriersenseerrors;
 329         u32     txoctets;
 330         u32     octetframes64;
 331         u32     octetframes65t127;
 332         u32     octetframes128t255;
 333         u32     octetframes256t511;
 334         u32     octetframes512t1023;
 335         u32     octetframes1024tup;
 336         u32     netoctets;
 337         u32     rxsofoverruns;
 338         u32     rxmofoverruns;
 339         u32     rxdmaoverruns;
 340 };
 341
 342 struct cpsw_slave {
 343         void __iomem                    *regs;
 344         struct cpsw_sliver_regs __iomem *sliver;
 345         int                             slave_num;
 346         u32                             mac_control;
 347         struct cpsw_slave_data          *data;
 348         struct phy_device               *phy;
 349         struct net_device               *ndev;
 350         u32                             port_vlan;
 351         u32                             open_stat;
 352 };
 353
 354 static inline u32 slave_read(struct cpsw_slave *slave, u32 offset)
 355 {
 356         return __raw_readl(slave->regs + offset);
 357 }
 358
 359 static inline void slave_write(struct cpsw_slave *slave, u32 val, u32 offset)
 360 {
 361         __raw_writel(val, slave->regs + offset);
 362 }
 363
 364 struct cpsw_priv {
 365         spinlock_t                      lock;
 366         struct platform_device          *pdev;
 367         struct net_device               *ndev;
 368         struct napi_struct              napi;
 369         struct device                   *dev;
 370         struct cpsw_platform_data       data;
 371         struct cpsw_ss_regs __iomem     *regs;
 372         struct cpsw_wr_regs __iomem     *wr_regs;
 373         u8 __iomem                      *hw_stats;
 374         struct cpsw_host_regs __iomem   *host_port_regs;
 375         u32                             msg_enable;
 376         u32                             version;
 377         u32                             coal_intvl;
 378         u32                             bus_freq_mhz;
 379         int                             rx_packet_max;
 380         int                             host_port;
 381         struct clk                      *clk;
 382         u8                              mac_addr[ETH_ALEN];
 383         struct cpsw_slave               *slaves;
 384         struct cpdma_ctlr               *dma;
 385         struct cpdma_chan               *txch, *rxch;
 386         struct cpsw_ale                 *ale;
 387         bool                            rx_pause;
 388         bool                            tx_pause;
 389         /* snapshot of IRQ numbers */
 390         u32 irqs_table[4];
 391         u32 num_irqs;
 392         bool irq_enabled;
 393         struct cpts *cpts;
 394         u32 emac_port;
 395 };
 396
 397 struct cpsw_stats {
 398         char stat_string[ETH_GSTRING_LEN];
 399         int type;
 400         int sizeof_stat;
 401         int stat_offset;
 402 };
 403
 404 enum {
 405         CPSW_STATS,
 406         CPDMA_RX_STATS,
 407         CPDMA_TX_STATS,
 408 };
 409
 410 #define CPSW_STAT(m)            CPSW_STATS,                             \
 411                                 sizeof(((struct cpsw_hw_stats *)0)->m), \
 412                                 offsetof(struct cpsw_hw_stats, m)
 413 #define CPDMA_RX_STAT(m)        CPDMA_RX_STATS,                            \
 414                                 sizeof(((struct cpdma_chan_stats *)0)->m), \
 415                                 offsetof(struct cpdma_chan_stats, m)
 416 #define CPDMA_TX_STAT(m)        CPDMA_TX_STATS,                            \
 417                                 sizeof(((struct cpdma_chan_stats *)0)->m), \
 418                                 offsetof(struct cpdma_chan_stats, m)
 419
 420 static const struct cpsw_stats cpsw_gstrings_stats[] = {
 421         { "Good Rx Frames", CPSW_STAT(rxgoodframes) },
 422         { "Broadcast Rx Frames", CPSW_STAT(rxbroadcastframes) },
 423         { "Multicast Rx Frames", CPSW_STAT(rxmulticastframes) },
 424         { "Pause Rx Frames", CPSW_STAT(rxpauseframes) },
 425         { "Rx CRC Errors", CPSW_STAT(rxcrcerrors) },
 426         { "Rx Align/Code Errors", CPSW_STAT(rxaligncodeerrors) },
 427         { "Oversize Rx Frames", CPSW_STAT(rxoversizedframes) },
 428         { "Rx Jabbers", CPSW_STAT(rxjabberframes) },
 429         { "Undersize (Short) Rx Frames", CPSW_STAT(rxundersizedframes) },
 430         { "Rx Fragments", CPSW_STAT(rxfragments) },
 431         { "Rx Octets", CPSW_STAT(rxoctets) },
 432         { "Good Tx Frames", CPSW_STAT(txgoodframes) },
 433         { "Broadcast Tx Frames", CPSW_STAT(txbroadcastframes) },
 434         { "Multicast Tx Frames", CPSW_STAT(txmulticastframes) },
 435         { "Pause Tx Frames", CPSW_STAT(txpauseframes) },
 436         { "Deferred Tx Frames", CPSW_STAT(txdeferredframes) },
 437         { "Collisions", CPSW_STAT(txcollisionframes) },
 438         { "Single Collision Tx Frames", CPSW_STAT(txsinglecollframes) },
 439         { "Multiple Collision Tx Frames", CPSW_STAT(txmultcollframes) },
 440         { "Excessive Collisions", CPSW_STAT(txexcessivecollisions) },
 441         { "Late Collisions", CPSW_STAT(txlatecollisions) },
 442         { "Tx Underrun", CPSW_STAT(txunderrun) },
 443         { "Carrier Sense Errors", CPSW_STAT(txcarriersenseerrors) },
 444         { "Tx Octets", CPSW_STAT(txoctets) },
 445         { "Rx + Tx 64 Octet Frames", CPSW_STAT(octetframes64) },
 446         { "Rx + Tx 65-127 Octet Frames", CPSW_STAT(octetframes65t127) },
 447         { "Rx + Tx 128-255 Octet Frames", CPSW_STAT(octetframes128t255) },
 448         { "Rx + Tx 256-511 Octet Frames", CPSW_STAT(octetframes256t511) },
 449         { "Rx + Tx 512-1023 Octet Frames", CPSW_STAT(octetframes512t1023) },
 450         { "Rx + Tx 1024-Up Octet Frames", CPSW_STAT(octetframes1024tup) },
 451         { "Net Octets", CPSW_STAT(netoctets) },
 452         { "Rx Start of Frame Overruns", CPSW_STAT(rxsofoverruns) },
 453         { "Rx Middle of Frame Overruns", CPSW_STAT(rxmofoverruns) },
 454         { "Rx DMA Overruns", CPSW_STAT(rxdmaoverruns) },
 455         { "Rx DMA chan: head_enqueue", CPDMA_RX_STAT(head_enqueue) },
 456         { "Rx DMA chan: tail_enqueue", CPDMA_RX_STAT(tail_enqueue) },
 457         { "Rx DMA chan: pad_enqueue", CPDMA_RX_STAT(pad_enqueue) },
 458         { "Rx DMA chan: misqueued", CPDMA_RX_STAT(misqueued) },
 459         { "Rx DMA chan: desc_alloc_fail", CPDMA_RX_STAT(desc_alloc_fail) },
 460         { "Rx DMA chan: pad_alloc_fail", CPDMA_RX_STAT(pad_alloc_fail) },
 461         { "Rx DMA chan: runt_receive_buf", CPDMA_RX_STAT(runt_receive_buff) },
 462         { "Rx DMA chan: runt_transmit_buf", CPDMA_RX_STAT(runt_transmit_buff) },
 463         { "Rx DMA chan: empty_dequeue", CPDMA_RX_STAT(empty_dequeue) },
 464         { "Rx DMA chan: busy_dequeue", CPDMA_RX_STAT(busy_dequeue) },
 465         { "Rx DMA chan: good_dequeue", CPDMA_RX_STAT(good_dequeue) },
 466         { "Rx DMA chan: requeue", CPDMA_RX_STAT(requeue) },
 467         { "Rx DMA chan: teardown_dequeue", CPDMA_RX_STAT(teardown_dequeue) },
 468         { "Tx DMA chan: head_enqueue", CPDMA_TX_STAT(head_enqueue) },
 469         { "Tx DMA chan: tail_enqueue", CPDMA_TX_STAT(tail_enqueue) },
 470         { "Tx DMA chan: pad_enqueue", CPDMA_TX_STAT(pad_enqueue) },
 471         { "Tx DMA chan: misqueued", CPDMA_TX_STAT(misqueued) },
 472         { "Tx DMA chan: desc_alloc_fail", CPDMA_TX_STAT(desc_alloc_fail) },
 473         { "Tx DMA chan: pad_alloc_fail", CPDMA_TX_STAT(pad_alloc_fail) },
 474         { "Tx DMA chan: runt_receive_buf", CPDMA_TX_STAT(runt_receive_buff) },
 475         { "Tx DMA chan: runt_transmit_buf", CPDMA_TX_STAT(runt_transmit_buff) },
 476         { "Tx DMA chan: empty_dequeue", CPDMA_TX_STAT(empty_dequeue) },
 477         { "Tx DMA chan: busy_dequeue", CPDMA_TX_STAT(busy_dequeue) },
 478         { "Tx DMA chan: good_dequeue", CPDMA_TX_STAT(good_dequeue) },
 479         { "Tx DMA chan: requeue", CPDMA_TX_STAT(requeue) },
 480         { "Tx DMA chan: teardown_dequeue", CPDMA_TX_STAT(teardown_dequeue) },
 481 };
 482
 483 #define CPSW_STATS_LEN  ARRAY_SIZE(cpsw_gstrings_stats)
 484
 485 #define napi_to_priv(napi)      container_of(napi, struct cpsw_priv, napi)
 486 #define for_each_slave(priv, func, arg...)                              \
 487         do {                                                            \
 488                 struct cpsw_slave *slave;                               \
 489                 int n;                                                  \
 490                 if (priv->data.dual_emac)                               \
 491                         (func)((priv)->slaves + priv->emac_port, ##arg);\
 492                 else                                                    \
 493                         for (n = (priv)->data.slaves,                   \
 494                                         slave = (priv)->slaves;         \
 495                                         n; n--)                         \
 496                                 (func)(slave++, ##arg);                 \
 497         } while (0)
 498 #define cpsw_get_slave_ndev(priv, __slave_no__)                         \
 499         ((__slave_no__ < priv->data.slaves) ?                           \
 500                 priv->slaves[__slave_no__].ndev : NULL)
 501 #define cpsw_get_slave_priv(priv, __slave_no__)                         \
 502         (((__slave_no__ < priv->data.slaves) &&                         \
 503                 (priv->slaves[__slave_no__].ndev)) ?                    \
 504                 netdev_priv(priv->slaves[__slave_no__].ndev) : NULL)    \
 505
 506 #define cpsw_dual_emac_src_port_detect(status, priv, ndev, skb)         \
 507         do {                                                            \
 508                 if (!priv->data.dual_emac)                              \
 509                         break;                                          \
 510                 if (CPDMA_RX_SOURCE_PORT(status) == 1) {                \
 511                         ndev = cpsw_get_slave_ndev(priv, 0);            \
 512                         priv = netdev_priv(ndev);                       \
 513                         skb->dev = ndev;                                \
 514                 } else if (CPDMA_RX_SOURCE_PORT(status) == 2) {         \
 515                         ndev = cpsw_get_slave_ndev(priv, 1);            \
 516                         priv = netdev_priv(ndev);                       \
 517                         skb->dev = ndev;                                \
 518                 }                                                       \
 519         } while (0)
 520 #define cpsw_add_mcast(priv, addr)                                      \
 521         do {                                                            \
 522                 if (priv->data.dual_emac) {                             \
 523                         struct cpsw_slave *slave = priv->slaves +       \
 524                                                 priv->emac_port;        \
 525                         int slave_port = cpsw_get_slave_port(priv,      \
 526                                                 slave->slave_num);      \
 527                         cpsw_ale_add_mcast(priv->ale, addr,             \
 528                                 1 << slave_port | 1 << priv->host_port, \
 529                                 ALE_VLAN, slave->port_vlan, 0);         \
 530                 } else {                                                \
 531                         cpsw_ale_add_mcast(priv->ale, addr,             \
 532                                 ALE_ALL_PORTS << priv->host_port,       \
 533                                 0, 0, 0);                               \
 534                 }                                                       \
 535         } while (0)
 536
 537 static inline int cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
 538 {
 539         if (priv->host_port == 0)
 540                 return slave_num + 1;
 541         else
 542                 return slave_num;
 543 }
 544
 545 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
 546 {
 547         struct cpsw_priv *priv = netdev_priv(ndev);
 548         struct cpsw_ale *ale = priv->ale;
 549         int i;
 550
 551         if (priv->data.dual_emac) {
 552                 bool flag = false;
 553
 554                 /* Enabling promiscuous mode for one interface will be
 555                  * common for both the interface as the interface shares
 556                  * the same hardware resource.
 557                  */
 558                 for (i = 0; i < priv->data.slaves; i++)
 559                         if (priv->slaves[i].ndev->flags & IFF_PROMISC)
 560                                 flag = true;
 561
 562                 if (!enable && flag) {
 563                         enable = true;
 564                         dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
 565                 }
 566
 567                 if (enable) {
 568                         /* Enable Bypass */
 569                         cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);
 570
 571                         dev_dbg(&ndev->dev, "promiscuity enabled\n");
 572                 } else {
 573                         /* Disable Bypass */
 574                         cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
 575                         dev_dbg(&ndev->dev, "promiscuity disabled\n");
 576                 }
 577         } else {
 578                 if (enable) {
 579                         unsigned long timeout = jiffies + HZ;
 580
 581                         /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
 582                         for (i = 0; i <= priv->data.slaves; i++) {
 583                                 cpsw_ale_control_set(ale, i,
 584                                                      ALE_PORT_NOLEARN, 1);
 585                                 cpsw_ale_control_set(ale, i,
 586                                                      ALE_PORT_NO_SA_UPDATE, 1);
 587                         }
 588
 589                         /* Clear All Untouched entries */
 590                         cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
 591                         do {
 592                                 cpu_relax();
 593                                 if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
 594                                         break;
 595                         } while (time_after(timeout, jiffies));
 596                         cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
 597
 598                         /* Clear all mcast from ALE */
 599                         cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS <<
 600                                                  priv->host_port, -1);
 601
 602                         /* Flood All Unicast Packets to Host port */
 603                         cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
 604                         dev_dbg(&ndev->dev, "promiscuity enabled\n");
 605                 } else {
 606                         /* Don't Flood All Unicast Packets to Host port */
 607                         cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
 608
 609                         /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
 610                         for (i = 0; i <= priv->data.slaves; i++) {
 611                                 cpsw_ale_control_set(ale, i,
 612                                                      ALE_PORT_NOLEARN, 0);
 613                                 cpsw_ale_control_set(ale, i,
 614                                                      ALE_PORT_NO_SA_UPDATE, 0);
 615                         }
 616                         dev_dbg(&ndev->dev, "promiscuity disabled\n");
 617                 }
 618         }
 619 }
 620
 621 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
 622 {
 623         struct cpsw_priv *priv = netdev_priv(ndev);
 624         int vid;
 625
 626         if (priv->data.dual_emac)
 627                 vid = priv->slaves[priv->emac_port].port_vlan;
 628         else
 629                 vid = priv->data.default_vlan;
 630
 631         if (ndev->flags & IFF_PROMISC) {
 632                 /* Enable promiscuous mode */
 633                 cpsw_set_promiscious(ndev, true);
 634                 cpsw_ale_set_allmulti(priv->ale, IFF_ALLMULTI);
 635                 return;
 636         } else {
 637                 /* Disable promiscuous mode */
 638                 cpsw_set_promiscious(ndev, false);
 639         }
 640
 641         /* Restore allmulti on vlans if necessary */
 642         cpsw_ale_set_allmulti(priv->ale, priv->ndev->flags & IFF_ALLMULTI);
 643
 644         /* Clear all mcast from ALE */
 645         cpsw_ale_flush_multicast(priv->ale, ALE_ALL_PORTS << priv->host_port,
 646                                  vid);
 647
 648         if (!netdev_mc_empty(ndev)) {
 649                 struct netdev_hw_addr *ha;
 650
 651                 /* program multicast address list into ALE register */
 652                 netdev_for_each_mc_addr(ha, ndev) {
 653                         cpsw_add_mcast(priv, (u8 *)ha->addr);
 654                 }
 655         }
 656 }
 657
 658 static void cpsw_intr_enable(struct cpsw_priv *priv)
 659 {
 660         __raw_writel(0xFF, &priv->wr_regs->tx_en);
 661         __raw_writel(0xFF, &priv->wr_regs->rx_en);
 662
 663         cpdma_ctlr_int_ctrl(priv->dma, true);
 664         return;
 665 }
 666
 667 static void cpsw_intr_disable(struct cpsw_priv *priv)
 668 {
 669         __raw_writel(0, &priv->wr_regs->tx_en);
 670         __raw_writel(0, &priv->wr_regs->rx_en);
 671
 672         cpdma_ctlr_int_ctrl(priv->dma, false);
 673         return;
 674 }
 675
 676 static void cpsw_tx_handler(void *token, int len, int status)
 677 {
 678         struct sk_buff          *skb = token;
 679         struct net_device       *ndev = skb->dev;
 680         struct cpsw_priv        *priv = netdev_priv(ndev);
 681
 682         /* Check whether the queue is stopped due to stalled tx dma, if the
 683          * queue is stopped then start the queue as we have free desc for tx
 684          */
 685         if (unlikely(netif_queue_stopped(ndev)))
 686                 netif_wake_queue(ndev);
 687         cpts_tx_timestamp(priv->cpts, skb);
 688         ndev->stats.tx_packets++;
 689         ndev->stats.tx_bytes += len;
 690         dev_kfree_skb_any(skb);
 691 }
 692
 693 static void cpsw_rx_handler(void *token, int len, int status)
 694 {
 695         struct sk_buff          *skb = token;
 696         struct sk_buff          *new_skb;
 697         struct net_device       *ndev = skb->dev;
 698         struct cpsw_priv        *priv = netdev_priv(ndev);
 699         int                     ret = 0;
 700
 701         cpsw_dual_emac_src_port_detect(status, priv, ndev, skb);
 702
 703         if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
 704                 bool ndev_status = false;
 705                 struct cpsw_slave *slave = priv->slaves;
 706                 int n;
 707
 708                 if (priv->data.dual_emac) {
 709                         /* In dual emac mode check for all interfaces */
 710                         for (n = priv->data.slaves; n; n--, slave++)
 711                                 if (netif_running(slave->ndev))
 712                                         ndev_status = true;
 713                 }
 714
 715                 if (ndev_status && (status >= 0)) {
 716                         /* The packet received is for the interface which
 717                          * is already down and the other interface is up
 718                          * and running, instead of freeing which results
 719                          * in reducing of the number of rx descriptor in
 720                          * DMA engine, requeue skb back to cpdma.
 721                          */
 722                         new_skb = skb;
 723                         goto requeue;
 724                 }
 725
 726                 /* the interface is going down, skbs are purged */
 727                 dev_kfree_skb_any(skb);
 728                 return;
 729         }
 730
 731         new_skb = netdev_alloc_skb_ip_align(ndev, priv->rx_packet_max);
 732         if (new_skb) {
 733                 skb_put(skb, len);
 734                 cpts_rx_timestamp(priv->cpts, skb);
 735                 skb->protocol = eth_type_trans(skb, ndev);
 736                 netif_receive_skb(skb);
 737                 ndev->stats.rx_bytes += len;
 738                 ndev->stats.rx_packets++;
 739         } else {
 740                 ndev->stats.rx_dropped++;
 741                 new_skb = skb;
 742         }
 743
 744 requeue:
 745         ret = cpdma_chan_submit(priv->rxch, new_skb, new_skb->data,
 746                         skb_tailroom(new_skb), 0);
 747         if (WARN_ON(ret < 0))
 748                 dev_kfree_skb_any(new_skb);
 749 }
 750
 751 static irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id)
 752 {
 753         struct cpsw_priv *priv = dev_id;
 754
 755         cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_TX);
 756         cpdma_chan_process(priv->txch, 128);
 757
 758         priv = cpsw_get_slave_priv(priv, 1);
 759         if (priv)
 760                 cpdma_chan_process(priv->txch, 128);
 761
 762         return IRQ_HANDLED;
 763 }
 764
 765 static irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id)
 766 {
 767         struct cpsw_priv *priv = dev_id;
 768
 769         cpdma_ctlr_eoi(priv->dma, CPDMA_EOI_RX);
 770
 771         cpsw_intr_disable(priv);
 772         if (priv->irq_enabled == true) {
 773                 disable_irq_nosync(priv->irqs_table[0]);
 774                 priv->irq_enabled = false;
 775         }
 776
 777         if (netif_running(priv->ndev)) {
 778                 napi_schedule(&priv->napi);
 779                 return IRQ_HANDLED;
 780         }
 781
 782         priv = cpsw_get_slave_priv(priv, 1);
 783         if (!priv)
 784                 return IRQ_NONE;
 785
 786         if (netif_running(priv->ndev)) {
 787                 napi_schedule(&priv->napi);
 788                 return IRQ_HANDLED;
 789         }
 790         return IRQ_NONE;
 791 }
 792
 793 static int cpsw_poll(struct napi_struct *napi, int budget)
 794 {
 795         struct cpsw_priv        *priv = napi_to_priv(napi);
 796         int                     num_rx;
 797
 798         num_rx = cpdma_chan_process(priv->rxch, budget);
 799         if (num_rx < budget) {
 800                 struct cpsw_priv *prim_cpsw;
 801
 802                 napi_complete(napi);
 803                 cpsw_intr_enable(priv);
 804                 prim_cpsw = cpsw_get_slave_priv(priv, 0);
 805                 if (prim_cpsw->irq_enabled == false) {
 806                         prim_cpsw->irq_enabled = true;
 807                         enable_irq(priv->irqs_table[0]);
 808                 }
 809         }
 810
 811         if (num_rx)
 812                 cpsw_dbg(priv, intr, "poll %d rx pkts\n", num_rx);
 813
 814         return num_rx;
 815 }
 816
 817 static inline void soft_reset(const char *module, void __iomem *reg)
 818 {
 819         unsigned long timeout = jiffies + HZ;
 820
 821         __raw_writel(1, reg);
 822         do {
 823                 cpu_relax();
 824         } while ((__raw_readl(reg) & 1) && time_after(timeout, jiffies));
 825
 826         WARN(__raw_readl(reg) & 1, "failed to soft-reset %s\n", module);
 827 }
 828
 829 #define mac_hi(mac)     (((mac)[0] << 0) | ((mac)[1] << 8) |    \
 830                          ((mac)[2] << 16) | ((mac)[3] << 24))
 831 #define mac_lo(mac)     (((mac)[4] << 0) | ((mac)[5] << 8))
 832
 833 static void cpsw_set_slave_mac(struct cpsw_slave *slave,
 834                                struct cpsw_priv *priv)
 835 {
 836         slave_write(slave, mac_hi(priv->mac_addr), SA_HI);
 837         slave_write(slave, mac_lo(priv->mac_addr), SA_LO);
 838 }
 839
 840 static void _cpsw_adjust_link(struct cpsw_slave *slave,
 841                               struct cpsw_priv *priv, bool *link)
 842 {
 843         struct phy_device       *phy = slave->phy;
 844         u32                     mac_control = 0;
 845         u32                     slave_port;
 846
 847         if (!phy)
 848                 return;
 849
 850         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
 851
 852         if (phy->link) {
 853                 mac_control = priv->data.mac_control;
 854
 855                 /* enable forwarding */
 856                 cpsw_ale_control_set(priv->ale, slave_port,
 857                                      ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
 858
 859                 if (phy->speed == 1000)
 860                         mac_control |= BIT(7);  /* GIGABITEN    */
 861                 if (phy->duplex)
 862                         mac_control |= BIT(0);  /* FULLDUPLEXEN */
 863
 864                 /* set speed_in input in case RMII mode is used in 100Mbps */
 865                 if (phy->speed == 100)
 866                         mac_control |= BIT(15);
 867                 else if (phy->speed == 10)
 868                         mac_control |= BIT(18); /* In Band mode */
 869
 870                 if (priv->rx_pause)
 871                         mac_control |= BIT(3);
 872
 873                 if (priv->tx_pause)
 874                         mac_control |= BIT(4);
 875
 876                 *link = true;
 877         } else {
 878                 mac_control = 0;
 879                 /* disable forwarding */
 880                 cpsw_ale_control_set(priv->ale, slave_port,
 881                                      ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
 882         }
 883
 884         if (mac_control != slave->mac_control) {
 885                 phy_print_status(phy);
 886                 __raw_writel(mac_control, &slave->sliver->mac_control);
 887         }
 888
 889         slave->mac_control = mac_control;
 890 }
 891
 892 static void cpsw_adjust_link(struct net_device *ndev)
 893 {
 894         struct cpsw_priv        *priv = netdev_priv(ndev);
 895         bool                    link = false;
 896
 897         for_each_slave(priv, _cpsw_adjust_link, priv, &link);
 898
 899         if (link) {
 900                 netif_carrier_on(ndev);
 901                 if (netif_running(ndev))
 902                         netif_wake_queue(ndev);
 903         } else {
 904                 netif_carrier_off(ndev);
 905                 netif_stop_queue(ndev);
 906         }
 907 }
 908
 909 static int cpsw_get_coalesce(struct net_device *ndev,
 910                                 struct ethtool_coalesce *coal)
 911 {
 912         struct cpsw_priv *priv = netdev_priv(ndev);
 913
 914         coal->rx_coalesce_usecs = priv->coal_intvl;
 915         return 0;
 916 }
 917
 918 static int cpsw_set_coalesce(struct net_device *ndev,
 919                                 struct ethtool_coalesce *coal)
 920 {
 921         struct cpsw_priv *priv = netdev_priv(ndev);
 922         u32 int_ctrl;
 923         u32 num_interrupts = 0;
 924         u32 prescale = 0;
 925         u32 addnl_dvdr = 1;
 926         u32 coal_intvl = 0;
 927
 928         coal_intvl = coal->rx_coalesce_usecs;
 929
 930         int_ctrl =  readl(&priv->wr_regs->int_control);
 931         prescale = priv->bus_freq_mhz * 4;
 932
 933         if (!coal->rx_coalesce_usecs) {
 934                 int_ctrl &= ~(CPSW_INTPRESCALE_MASK | CPSW_INTPACEEN);
 935                 goto update_return;
 936         }
 937
 938         if (coal_intvl < CPSW_CMINTMIN_INTVL)
 939                 coal_intvl = CPSW_CMINTMIN_INTVL;
 940
 941         if (coal_intvl > CPSW_CMINTMAX_INTVL) {
 942                 /* Interrupt pacer works with 4us Pulse, we can
 943                  * throttle further by dilating the 4us pulse.
 944                  */
 945                 addnl_dvdr = CPSW_INTPRESCALE_MASK / prescale;
 946
 947                 if (addnl_dvdr > 1) {
 948                         prescale *= addnl_dvdr;
 949                         if (coal_intvl > (CPSW_CMINTMAX_INTVL * addnl_dvdr))
 950                                 coal_intvl = (CPSW_CMINTMAX_INTVL
 951                                                 * addnl_dvdr);
 952                 } else {
 953                         addnl_dvdr = 1;
 954                         coal_intvl = CPSW_CMINTMAX_INTVL;
 955                 }
 956         }
 957
 958         num_interrupts = (1000 * addnl_dvdr) / coal_intvl;
 959         writel(num_interrupts, &priv->wr_regs->rx_imax);
 960         writel(num_interrupts, &priv->wr_regs->tx_imax);
 961
 962         int_ctrl |= CPSW_INTPACEEN;
 963         int_ctrl &= (~CPSW_INTPRESCALE_MASK);
 964         int_ctrl |= (prescale & CPSW_INTPRESCALE_MASK);
 965
 966 update_return:
 967         writel(int_ctrl, &priv->wr_regs->int_control);
 968
 969         cpsw_notice(priv, timer, "Set coalesce to %d usecs.\n", coal_intvl);
 970         if (priv->data.dual_emac) {
 971                 int i;
 972
 973                 for (i = 0; i < priv->data.slaves; i++) {
 974                         priv = netdev_priv(priv->slaves[i].ndev);
 975                         priv->coal_intvl = coal_intvl;
 976                 }
 977         } else {
 978                 priv->coal_intvl = coal_intvl;
 979         }
 980
 981         return 0;
 982 }
 983
 984 static int cpsw_get_sset_count(struct net_device *ndev, int sset)
 985 {
 986         switch (sset) {
 987         case ETH_SS_STATS:
 988                 return CPSW_STATS_LEN;
 989         default:
 990                 return -EOPNOTSUPP;
 991         }
 992 }
 993
 994 static void cpsw_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 995 {
 996         u8 *p = data;
 997         int i;
 998
 999         switch (stringset) {
1000         case ETH_SS_STATS:
1001                 for (i = 0; i < CPSW_STATS_LEN; i++) {
1002                         memcpy(p, cpsw_gstrings_stats[i].stat_string,
1003                                ETH_GSTRING_LEN);
1004                         p += ETH_GSTRING_LEN;
1005                 }
1006                 break;
1007         }
1008 }
1009
1010 static void cpsw_get_ethtool_stats(struct net_device *ndev,
1011                                     struct ethtool_stats *stats, u64 *data)
1012 {
1013         struct cpsw_priv *priv = netdev_priv(ndev);
1014         struct cpdma_chan_stats rx_stats;
1015         struct cpdma_chan_stats tx_stats;
1016         u32 val;
1017         u8 *p;
1018         int i;
1019
1020         /* Collect Davinci CPDMA stats for Rx and Tx Channel */
1021         cpdma_chan_get_stats(priv->rxch, &rx_stats);
1022         cpdma_chan_get_stats(priv->txch, &tx_stats);
1023
1024         for (i = 0; i < CPSW_STATS_LEN; i++) {
1025                 switch (cpsw_gstrings_stats[i].type) {
1026                 case CPSW_STATS:
1027                         val = readl(priv->hw_stats +
1028                                     cpsw_gstrings_stats[i].stat_offset);
1029                         data[i] = val;
1030                         break;
1031
1032                 case CPDMA_RX_STATS:
1033                         p = (u8 *)&rx_stats +
1034                                 cpsw_gstrings_stats[i].stat_offset;
1035                         data[i] = *(u32 *)p;
1036                         break;
1037
1038                 case CPDMA_TX_STATS:
1039                         p = (u8 *)&tx_stats +
1040                                 cpsw_gstrings_stats[i].stat_offset;
1041                         data[i] = *(u32 *)p;
1042                         break;
1043                 }
1044         }
1045 }
1046
1047 static int cpsw_common_res_usage_state(struct cpsw_priv *priv)
1048 {
1049         u32 i;
1050         u32 usage_count = 0;
1051
1052         if (!priv->data.dual_emac)
1053                 return 0;
1054
1055         for (i = 0; i < priv->data.slaves; i++)
1056                 if (priv->slaves[i].open_stat)
1057                         usage_count++;
1058
1059         return usage_count;
1060 }
1061
1062 static inline int cpsw_tx_packet_submit(struct net_device *ndev,
1063                         struct cpsw_priv *priv, struct sk_buff *skb)
1064 {
1065         if (!priv->data.dual_emac)
1066                 return cpdma_chan_submit(priv->txch, skb, skb->data,
1067                                   skb->len, 0);
1068
1069         if (ndev == cpsw_get_slave_ndev(priv, 0))
1070                 return cpdma_chan_submit(priv->txch, skb, skb->data,
1071                                   skb->len, 1);
1072         else
1073                 return cpdma_chan_submit(priv->txch, skb, skb->data,
1074                                   skb->len, 2);
1075 }
1076
1077 static inline void cpsw_add_dual_emac_def_ale_entries(
1078                 struct cpsw_priv *priv, struct cpsw_slave *slave,
1079                 u32 slave_port)
1080 {
1081         u32 port_mask = 1 << slave_port | 1 << priv->host_port;
1082
1083         if (priv->version == CPSW_VERSION_1)
1084                 slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
1085         else
1086                 slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
1087         cpsw_ale_add_vlan(priv->ale, slave->port_vlan, port_mask,
1088                           port_mask, port_mask, 0);
1089         cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1090                            port_mask, ALE_VLAN, slave->port_vlan, 0);
1091         cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
1092                 priv->host_port, ALE_VLAN | ALE_SECURE, slave->port_vlan);
1093 }
1094
1095 static void soft_reset_slave(struct cpsw_slave *slave)
1096 {
1097         char name[32];
1098
1099         snprintf(name, sizeof(name), "slave-%d", slave->slave_num);
1100         soft_reset(name, &slave->sliver->soft_reset);
1101 }
1102
1103 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
1104 {
1105         u32 slave_port;
1106
1107         soft_reset_slave(slave);
1108
1109         /* setup priority mapping */
1110         __raw_writel(RX_PRIORITY_MAPPING, &slave->sliver->rx_pri_map);
1111
1112         switch (priv->version) {
1113         case CPSW_VERSION_1:
1114                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
1115                 break;
1116         case CPSW_VERSION_2:
1117         case CPSW_VERSION_3:
1118         case CPSW_VERSION_4:
1119                 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
1120                 break;
1121         }
1122
1123         /* setup max packet size, and mac address */
1124         __raw_writel(priv->rx_packet_max, &slave->sliver->rx_maxlen);
1125         cpsw_set_slave_mac(slave, priv);
1126
1127         slave->mac_control = 0; /* no link yet */
1128
1129         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
1130
1131         if (priv->data.dual_emac)
1132                 cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
1133         else
1134                 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1135                                    1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
1136
1137         slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
1138                                  &cpsw_adjust_link, slave->data->phy_if);
1139         if (IS_ERR(slave->phy)) {
1140                 dev_err(priv->dev, "phy %s not found on slave %d\n",
1141                         slave->data->phy_id, slave->slave_num);
1142                 slave->phy = NULL;
1143         } else {
1144                 dev_info(priv->dev, "phy found : id is : 0x%x\n",
1145                          slave->phy->phy_id);
1146                 phy_start(slave->phy);
1147
1148                 /* Configure GMII_SEL register */
1149                 cpsw_phy_sel(&priv->pdev->dev, slave->phy->interface,
1150                              slave->slave_num);
1151         }
1152 }
1153
1154 static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
1155 {
1156         const int vlan = priv->data.default_vlan;
1157         const int port = priv->host_port;
1158         u32 reg;
1159         int i;
1160         int unreg_mcast_mask;
1161
1162         reg = (priv->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
1163                CPSW2_PORT_VLAN;
1164
1165         writel(vlan, &priv->host_port_regs->port_vlan);
1166
1167         for (i = 0; i < priv->data.slaves; i++)
1168                 slave_write(priv->slaves + i, vlan, reg);
1169
1170         if (priv->ndev->flags & IFF_ALLMULTI)
1171                 unreg_mcast_mask = ALE_ALL_PORTS;
1172         else
1173                 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1174
1175         cpsw_ale_add_vlan(priv->ale, vlan, ALE_ALL_PORTS << port,
1176                           ALE_ALL_PORTS << port, ALE_ALL_PORTS << port,
1177                           unreg_mcast_mask << port);
1178 }
1179
1180 static void cpsw_init_host_port(struct cpsw_priv *priv)
1181 {
1182         u32 control_reg;
1183         u32 fifo_mode;
1184
1185         /* soft reset the controller and initialize ale */
1186         soft_reset("cpsw", &priv->regs->soft_reset);
1187         cpsw_ale_start(priv->ale);
1188
1189         /* switch to vlan unaware mode */
1190         cpsw_ale_control_set(priv->ale, priv->host_port, ALE_VLAN_AWARE,
1191                              CPSW_ALE_VLAN_AWARE);
1192         control_reg = readl(&priv->regs->control);
1193         control_reg |= CPSW_VLAN_AWARE;
1194         writel(control_reg, &priv->regs->control);
1195         fifo_mode = (priv->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
1196                      CPSW_FIFO_NORMAL_MODE;
1197         writel(fifo_mode, &priv->host_port_regs->tx_in_ctl);
1198
1199         /* setup host port priority mapping */
1200         __raw_writel(CPDMA_TX_PRIORITY_MAP,
1201                      &priv->host_port_regs->cpdma_tx_pri_map);
1202         __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
1203
1204         cpsw_ale_control_set(priv->ale, priv->host_port,
1205                              ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
1206
1207         if (!priv->data.dual_emac) {
1208                 cpsw_ale_add_ucast(priv->ale, priv->mac_addr, priv->host_port,
1209                                    0, 0);
1210                 cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1211                                    1 << priv->host_port, 0, 0, ALE_MCAST_FWD_2);
1212         }
1213 }
1214
1215 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_priv *priv)
1216 {
1217         u32 slave_port;
1218
1219         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
1220
1221         if (!slave->phy)
1222                 return;
1223         phy_stop(slave->phy);
1224         phy_disconnect(slave->phy);
1225         slave->phy = NULL;
1226         cpsw_ale_control_set(priv->ale, slave_port,
1227                              ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1228 }
1229
1230 static int cpsw_ndo_open(struct net_device *ndev)
1231 {
1232         struct cpsw_priv *priv = netdev_priv(ndev);
1233         struct cpsw_priv *prim_cpsw;
1234         int i, ret;
1235         u32 reg;
1236
1237         if (!cpsw_common_res_usage_state(priv))
1238                 cpsw_intr_disable(priv);
1239         netif_carrier_off(ndev);
1240
1241         pm_runtime_get_sync(&priv->pdev->dev);
1242
1243         reg = priv->version;
1244
1245         dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
1246                  CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
1247                  CPSW_RTL_VERSION(reg));
1248
1249         /* initialize host and slave ports */
1250         if (!cpsw_common_res_usage_state(priv))
1251                 cpsw_init_host_port(priv);
1252         for_each_slave(priv, cpsw_slave_open, priv);
1253
1254         /* Add default VLAN */
1255         if (!priv->data.dual_emac)
1256                 cpsw_add_default_vlan(priv);
1257         else
1258                 cpsw_ale_add_vlan(priv->ale, priv->data.default_vlan,
1259                                   ALE_ALL_PORTS << priv->host_port,
1260                                   ALE_ALL_PORTS << priv->host_port, 0, 0);
1261
1262         if (!cpsw_common_res_usage_state(priv)) {
1263                 /* setup tx dma to fixed prio and zero offset */
1264                 cpdma_control_set(priv->dma, CPDMA_TX_PRIO_FIXED, 1);
1265                 cpdma_control_set(priv->dma, CPDMA_RX_BUFFER_OFFSET, 0);
1266
1267                 /* disable priority elevation */
1268                 __raw_writel(0, &priv->regs->ptype);
1269
1270                 /* enable statistics collection only on all ports */
1271                 __raw_writel(0x7, &priv->regs->stat_port_en);
1272
1273                 /* Enable internal fifo flow control */
1274                 writel(0x7, &priv->regs->flow_control);
1275
1276                 if (WARN_ON(!priv->data.rx_descs))
1277                         priv->data.rx_descs = 128;
1278
1279                 for (i = 0; i < priv->data.rx_descs; i++) {
1280                         struct sk_buff *skb;
1281
1282                         ret = -ENOMEM;
1283                         skb = __netdev_alloc_skb_ip_align(priv->ndev,
1284                                         priv->rx_packet_max, GFP_KERNEL);
1285                         if (!skb)
1286                                 goto err_cleanup;
1287                         ret = cpdma_chan_submit(priv->rxch, skb, skb->data,
1288                                         skb_tailroom(skb), 0);
1289                         if (ret < 0) {
1290                                 kfree_skb(skb);
1291                                 goto err_cleanup;
1292                         }
1293                 }
1294                 /* continue even if we didn't manage to submit all
1295                  * receive descs
1296                  */
1297                 cpsw_info(priv, ifup, "submitted %d rx descriptors\n", i);
1298
1299                 if (cpts_register(&priv->pdev->dev, priv->cpts,
1300                                   priv->data.cpts_clock_mult,
1301                                   priv->data.cpts_clock_shift))
1302                         dev_err(priv->dev, "error registering cpts device\n");
1303
1304         }
1305
1306         /* Enable Interrupt pacing if configured */
1307         if (priv->coal_intvl != 0) {
1308                 struct ethtool_coalesce coal;
1309
1310                 coal.rx_coalesce_usecs = (priv->coal_intvl << 4);
1311                 cpsw_set_coalesce(ndev, &coal);
1312         }
1313
1314         napi_enable(&priv->napi);
1315         cpdma_ctlr_start(priv->dma);
1316         cpsw_intr_enable(priv);
1317
1318         prim_cpsw = cpsw_get_slave_priv(priv, 0);
1319         if (prim_cpsw->irq_enabled == false) {
1320                 if ((priv == prim_cpsw) || !netif_running(prim_cpsw->ndev)) {
1321                         prim_cpsw->irq_enabled = true;
1322                         enable_irq(prim_cpsw->irqs_table[0]);
1323                 }
1324         }
1325
1326         if (priv->data.dual_emac)
1327                 priv->slaves[priv->emac_port].open_stat = true;
1328         return 0;
1329
1330 err_cleanup:
1331         cpdma_ctlr_stop(priv->dma);
1332         for_each_slave(priv, cpsw_slave_stop, priv);
1333         pm_runtime_put_sync(&priv->pdev->dev);
1334         netif_carrier_off(priv->ndev);
1335         return ret;
1336 }
1337
1338 static int cpsw_ndo_stop(struct net_device *ndev)
1339 {
1340         struct cpsw_priv *priv = netdev_priv(ndev);
1341
1342         cpsw_info(priv, ifdown, "shutting down cpsw device\n");
1343         netif_stop_queue(priv->ndev);
1344         napi_disable(&priv->napi);
1345         netif_carrier_off(priv->ndev);
1346
1347         if (cpsw_common_res_usage_state(priv) <= 1) {
1348                 cpts_unregister(priv->cpts);
1349                 cpsw_intr_disable(priv);
1350                 cpdma_ctlr_stop(priv->dma);
1351                 cpsw_ale_stop(priv->ale);
1352         }
1353         for_each_slave(priv, cpsw_slave_stop, priv);
1354         pm_runtime_put_sync(&priv->pdev->dev);
1355         if (priv->data.dual_emac)
1356                 priv->slaves[priv->emac_port].open_stat = false;
1357         return 0;
1358 }
1359
1360 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
1361                                        struct net_device *ndev)
1362 {
1363         struct cpsw_priv *priv = netdev_priv(ndev);
1364         int ret;
1365
1366         ndev->trans_start = jiffies;
1367
1368         if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
1369                 cpsw_err(priv, tx_err, "packet pad failed\n");
1370                 ndev->stats.tx_dropped++;
1371                 return NETDEV_TX_OK;
1372         }
1373
1374         if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
1375                                 priv->cpts->tx_enable)
1376                 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1377
1378         skb_tx_timestamp(skb);
1379
1380         ret = cpsw_tx_packet_submit(ndev, priv, skb);
1381         if (unlikely(ret != 0)) {
1382                 cpsw_err(priv, tx_err, "desc submit failed\n");
1383                 goto fail;
1384         }
1385
1386         /* If there is no more tx desc left free then we need to
1387          * tell the kernel to stop sending us tx frames.
1388          */
1389         if (unlikely(!cpdma_check_free_tx_desc(priv->txch)))
1390                 netif_stop_queue(ndev);
1391
1392         return NETDEV_TX_OK;
1393 fail:
1394         ndev->stats.tx_dropped++;
1395         netif_stop_queue(ndev);
1396         return NETDEV_TX_BUSY;
1397 }
1398
1399 #ifdef CONFIG_TI_CPTS
1400
1401 static void cpsw_hwtstamp_v1(struct cpsw_priv *priv)
1402 {
1403         struct cpsw_slave *slave = &priv->slaves[priv->data.active_slave];
1404         u32 ts_en, seq_id;
1405
1406         if (!priv->cpts->tx_enable && !priv->cpts->rx_enable) {
1407                 slave_write(slave, 0, CPSW1_TS_CTL);
1408                 return;
1409         }
1410
1411         seq_id = (30 << CPSW_V1_SEQ_ID_OFS_SHIFT) | ETH_P_1588;
1412         ts_en = EVENT_MSG_BITS << CPSW_V1_MSG_TYPE_OFS;
1413
1414         if (priv->cpts->tx_enable)
1415                 ts_en |= CPSW_V1_TS_TX_EN;
1416
1417         if (priv->cpts->rx_enable)
1418                 ts_en |= CPSW_V1_TS_RX_EN;
1419
1420         slave_write(slave, ts_en, CPSW1_TS_CTL);
1421         slave_write(slave, seq_id, CPSW1_TS_SEQ_LTYPE);
1422 }
1423
1424 static void cpsw_hwtstamp_v2(struct cpsw_priv *priv)
1425 {
1426         struct cpsw_slave *slave;
1427         u32 ctrl, mtype;
1428
1429         if (priv->data.dual_emac)
1430                 slave = &priv->slaves[priv->emac_port];
1431         else
1432                 slave = &priv->slaves[priv->data.active_slave];
1433
1434         ctrl = slave_read(slave, CPSW2_CONTROL);
1435         switch (priv->version) {
1436         case CPSW_VERSION_2:
1437                 ctrl &= ~CTRL_V2_ALL_TS_MASK;
1438
1439                 if (priv->cpts->tx_enable)
1440                         ctrl |= CTRL_V2_TX_TS_BITS;
1441
1442                 if (priv->cpts->rx_enable)
1443                         ctrl |= CTRL_V2_RX_TS_BITS;
1444                 break;
1445         case CPSW_VERSION_3:
1446         default:
1447                 ctrl &= ~CTRL_V3_ALL_TS_MASK;
1448
1449                 if (priv->cpts->tx_enable)
1450                         ctrl |= CTRL_V3_TX_TS_BITS;
1451
1452                 if (priv->cpts->rx_enable)
1453                         ctrl |= CTRL_V3_RX_TS_BITS;
1454                 break;
1455         }
1456
1457         mtype = (30 << TS_SEQ_ID_OFFSET_SHIFT) | EVENT_MSG_BITS;
1458
1459         slave_write(slave, mtype, CPSW2_TS_SEQ_MTYPE);
1460         slave_write(slave, ctrl, CPSW2_CONTROL);
1461         __raw_writel(ETH_P_1588, &priv->regs->ts_ltype);
1462 }
1463
1464 static int cpsw_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
1465 {
1466         struct cpsw_priv *priv = netdev_priv(dev);
1467         struct cpts *cpts = priv->cpts;
1468         struct hwtstamp_config cfg;
1469
1470         if (priv->version != CPSW_VERSION_1 &&
1471             priv->version != CPSW_VERSION_2 &&
1472             priv->version != CPSW_VERSION_3)
1473                 return -EOPNOTSUPP;
1474
1475         if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1476                 return -EFAULT;
1477
1478         /* reserved for future extensions */
1479         if (cfg.flags)
1480                 return -EINVAL;
1481
1482         if (cfg.tx_type != HWTSTAMP_TX_OFF && cfg.tx_type != HWTSTAMP_TX_ON)
1483                 return -ERANGE;
1484
1485         switch (cfg.rx_filter) {
1486         case HWTSTAMP_FILTER_NONE:
1487                 cpts->rx_enable = 0;
1488                 break;
1489         case HWTSTAMP_FILTER_ALL:
1490         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1491         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1492         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1493                 return -ERANGE;
1494         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1495         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1496         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1497         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1498         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1499         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1500         case HWTSTAMP_FILTER_PTP_V2_EVENT:
1501         case HWTSTAMP_FILTER_PTP_V2_SYNC:
1502         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1503                 cpts->rx_enable = 1;
1504                 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
1505                 break;
1506         default:
1507                 return -ERANGE;
1508         }
1509
1510         cpts->tx_enable = cfg.tx_type == HWTSTAMP_TX_ON;
1511
1512         switch (priv->version) {
1513         case CPSW_VERSION_1:
1514                 cpsw_hwtstamp_v1(priv);
1515                 break;
1516         case CPSW_VERSION_2:
1517         case CPSW_VERSION_3:
1518                 cpsw_hwtstamp_v2(priv);
1519                 break;
1520         default:
1521                 WARN_ON(1);
1522         }
1523
1524         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1525 }
1526
1527 static int cpsw_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
1528 {
1529         struct cpsw_priv *priv = netdev_priv(dev);
1530         struct cpts *cpts = priv->cpts;
1531         struct hwtstamp_config cfg;
1532
1533         if (priv->version != CPSW_VERSION_1 &&
1534             priv->version != CPSW_VERSION_2 &&
1535             priv->version != CPSW_VERSION_3)
1536                 return -EOPNOTSUPP;
1537
1538         cfg.flags = 0;
1539         cfg.tx_type = cpts->tx_enable ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
1540         cfg.rx_filter = (cpts->rx_enable ?
1541                          HWTSTAMP_FILTER_PTP_V2_EVENT : HWTSTAMP_FILTER_NONE);
1542
1543         return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1544 }
1545
1546 #endif /*CONFIG_TI_CPTS*/
1547
1548 static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
1549 {
1550         struct cpsw_priv *priv = netdev_priv(dev);
1551         int slave_no = cpsw_slave_index(priv);
1552
1553         if (!netif_running(dev))
1554                 return -EINVAL;
1555
1556         switch (cmd) {
1557 #ifdef CONFIG_TI_CPTS
1558         case SIOCSHWTSTAMP:
1559                 return cpsw_hwtstamp_set(dev, req);
1560         case SIOCGHWTSTAMP:
1561                 return cpsw_hwtstamp_get(dev, req);
1562 #endif
1563         }
1564
1565         if (!priv->slaves[slave_no].phy)
1566                 return -EOPNOTSUPP;
1567         return phy_mii_ioctl(priv->slaves[slave_no].phy, req, cmd);
1568 }
1569
1570 static void cpsw_ndo_tx_timeout(struct net_device *ndev)
1571 {
1572         struct cpsw_priv *priv = netdev_priv(ndev);
1573
1574         cpsw_err(priv, tx_err, "transmit timeout, restarting dma\n");
1575         ndev->stats.tx_errors++;
1576         cpsw_intr_disable(priv);
1577         cpdma_chan_stop(priv->txch);
1578         cpdma_chan_start(priv->txch);
1579         cpsw_intr_enable(priv);
1580 }
1581
1582 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
1583 {
1584         struct cpsw_priv *priv = netdev_priv(ndev);
1585         struct sockaddr *addr = (struct sockaddr *)p;
1586         int flags = 0;
1587         u16 vid = 0;
1588
1589         if (!is_valid_ether_addr(addr->sa_data))
1590                 return -EADDRNOTAVAIL;
1591
1592         if (priv->data.dual_emac) {
1593                 vid = priv->slaves[priv->emac_port].port_vlan;
1594                 flags = ALE_VLAN;
1595         }
1596
1597         cpsw_ale_del_ucast(priv->ale, priv->mac_addr, priv->host_port,
1598                            flags, vid);
1599         cpsw_ale_add_ucast(priv->ale, addr->sa_data, priv->host_port,
1600                            flags, vid);
1601
1602         memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
1603         memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
1604         for_each_slave(priv, cpsw_set_slave_mac, priv);
1605
1606         return 0;
1607 }
1608
1609 #ifdef CONFIG_NET_POLL_CONTROLLER
1610 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1611 {
1612         struct cpsw_priv *priv = netdev_priv(ndev);
1613
1614         cpsw_intr_disable(priv);
1615         cpsw_rx_interrupt(priv->irqs_table[0], priv);
1616         cpsw_tx_interrupt(priv->irqs_table[1], priv);
1617         cpsw_intr_enable(priv);
1618 }
1619 #endif
1620
1621 static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
1622                                 unsigned short vid)
1623 {
1624         int ret;
1625         int unreg_mcast_mask = 0;
1626         u32 port_mask;
1627
1628         if (priv->data.dual_emac) {
1629                 port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
1630
1631                 if (priv->ndev->flags & IFF_ALLMULTI)
1632                         unreg_mcast_mask = port_mask;
1633         } else {
1634                 port_mask = ALE_ALL_PORTS;
1635
1636                 if (priv->ndev->flags & IFF_ALLMULTI)
1637                         unreg_mcast_mask = ALE_ALL_PORTS;
1638                 else
1639                         unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1640         }
1641
1642         ret = cpsw_ale_add_vlan(priv->ale, vid, port_mask, 0, port_mask,
1643                                 unreg_mcast_mask << priv->host_port);
1644         if (ret != 0)
1645                 return ret;
1646
1647         ret = cpsw_ale_add_ucast(priv->ale, priv->mac_addr,
1648                                  priv->host_port, ALE_VLAN, vid);
1649         if (ret != 0)
1650                 goto clean_vid;
1651
1652         ret = cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1653                                  port_mask, ALE_VLAN, vid, 0);
1654         if (ret != 0)
1655                 goto clean_vlan_ucast;
1656         return 0;
1657
1658 clean_vlan_ucast:
1659         cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
1660                             priv->host_port, ALE_VLAN, vid);
1661 clean_vid:
1662         cpsw_ale_del_vlan(priv->ale, vid, 0);
1663         return ret;
1664 }
1665
1666 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1667                                     __be16 proto, u16 vid)
1668 {
1669         struct cpsw_priv *priv = netdev_priv(ndev);
1670
1671         if (vid == priv->data.default_vlan)
1672                 return 0;
1673
1674         if (priv->data.dual_emac) {
1675                 /* In dual EMAC, reserved VLAN id should not be used for
1676                  * creating VLAN interfaces as this can break the dual
1677                  * EMAC port separation
1678                  */
1679                 int i;
1680
1681                 for (i = 0; i < priv->data.slaves; i++) {
1682                         if (vid == priv->slaves[i].port_vlan)
1683                                 return -EINVAL;
1684                 }
1685         }
1686
1687         dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
1688         return cpsw_add_vlan_ale_entry(priv, vid);
1689 }
1690
1691 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1692                                      __be16 proto, u16 vid)
1693 {
1694         struct cpsw_priv *priv = netdev_priv(ndev);
1695         int ret;
1696
1697         if (vid == priv->data.default_vlan)
1698                 return 0;
1699
1700         if (priv->data.dual_emac) {
1701                 int i;
1702
1703                 for (i = 0; i < priv->data.slaves; i++) {
1704                         if (vid == priv->slaves[i].port_vlan)
1705                                 return -EINVAL;
1706                 }
1707         }
1708
1709         dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1710         ret = cpsw_ale_del_vlan(priv->ale, vid, 0);
1711         if (ret != 0)
1712                 return ret;
1713
1714         ret = cpsw_ale_del_ucast(priv->ale, priv->mac_addr,
1715                                  priv->host_port, ALE_VLAN, vid);
1716         if (ret != 0)
1717                 return ret;
1718
1719         return cpsw_ale_del_mcast(priv->ale, priv->ndev->broadcast,
1720                                   0, ALE_VLAN, vid);
1721 }
1722
1723 static const struct net_device_ops cpsw_netdev_ops = {
1724         .ndo_open               = cpsw_ndo_open,
1725         .ndo_stop               = cpsw_ndo_stop,
1726         .ndo_start_xmit         = cpsw_ndo_start_xmit,
1727         .ndo_set_mac_address    = cpsw_ndo_set_mac_address,
1728         .ndo_do_ioctl           = cpsw_ndo_ioctl,
1729         .ndo_validate_addr      = eth_validate_addr,
1730         .ndo_change_mtu         = eth_change_mtu,
1731         .ndo_tx_timeout         = cpsw_ndo_tx_timeout,
1732         .ndo_set_rx_mode        = cpsw_ndo_set_rx_mode,
1733 #ifdef CONFIG_NET_POLL_CONTROLLER
1734         .ndo_poll_controller    = cpsw_ndo_poll_controller,
1735 #endif
1736         .ndo_vlan_rx_add_vid    = cpsw_ndo_vlan_rx_add_vid,
1737         .ndo_vlan_rx_kill_vid   = cpsw_ndo_vlan_rx_kill_vid,
1738 };
1739
1740 static int cpsw_get_regs_len(struct net_device *ndev)
1741 {
1742         struct cpsw_priv *priv = netdev_priv(ndev);
1743
1744         return priv->data.ale_entries * ALE_ENTRY_WORDS * sizeof(u32);
1745 }
1746
1747 static void cpsw_get_regs(struct net_device *ndev,
1748                           struct ethtool_regs *regs, void *p)
1749 {
1750         struct cpsw_priv *priv = netdev_priv(ndev);
1751         u32 *reg = p;
1752
1753         /* update CPSW IP version */
1754         regs->version = priv->version;
1755
1756         cpsw_ale_dump(priv->ale, reg);
1757 }
1758
1759 static void cpsw_get_drvinfo(struct net_device *ndev,
1760                              struct ethtool_drvinfo *info)
1761 {
1762         struct cpsw_priv *priv = netdev_priv(ndev);
1763
1764         strlcpy(info->driver, "cpsw", sizeof(info->driver));
1765         strlcpy(info->version, "1.0", sizeof(info->version));
1766         strlcpy(info->bus_info, priv->pdev->name, sizeof(info->bus_info));
1767         info->regdump_len = cpsw_get_regs_len(ndev);
1768 }
1769
1770 static u32 cpsw_get_msglevel(struct net_device *ndev)
1771 {
1772         struct cpsw_priv *priv = netdev_priv(ndev);
1773         return priv->msg_enable;
1774 }
1775
1776 static void cpsw_set_msglevel(struct net_device *ndev, u32 value)
1777 {
1778         struct cpsw_priv *priv = netdev_priv(ndev);
1779         priv->msg_enable = value;
1780 }
1781
1782 static int cpsw_get_ts_info(struct net_device *ndev,
1783                             struct ethtool_ts_info *info)
1784 {
1785 #ifdef CONFIG_TI_CPTS
1786         struct cpsw_priv *priv = netdev_priv(ndev);
1787
1788         info->so_timestamping =
1789                 SOF_TIMESTAMPING_TX_HARDWARE |
1790                 SOF_TIMESTAMPING_TX_SOFTWARE |
1791                 SOF_TIMESTAMPING_RX_HARDWARE |
1792                 SOF_TIMESTAMPING_RX_SOFTWARE |
1793                 SOF_TIMESTAMPING_SOFTWARE |
1794                 SOF_TIMESTAMPING_RAW_HARDWARE;
1795         info->phc_index = priv->cpts->phc_index;
1796         info->tx_types =
1797                 (1 << HWTSTAMP_TX_OFF) |
1798                 (1 << HWTSTAMP_TX_ON);
1799         info->rx_filters =
1800                 (1 << HWTSTAMP_FILTER_NONE) |
1801                 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
1802 #else
1803         info->so_timestamping =
1804                 SOF_TIMESTAMPING_TX_SOFTWARE |
1805                 SOF_TIMESTAMPING_RX_SOFTWARE |
1806                 SOF_TIMESTAMPING_SOFTWARE;
1807         info->phc_index = -1;
1808         info->tx_types = 0;
1809         info->rx_filters = 0;
1810 #endif
1811         return 0;
1812 }
1813
1814 static int cpsw_get_settings(struct net_device *ndev,
1815                              struct ethtool_cmd *ecmd)
1816 {
1817         struct cpsw_priv *priv = netdev_priv(ndev);
1818         int slave_no = cpsw_slave_index(priv);
1819
1820         if (priv->slaves[slave_no].phy)
1821                 return phy_ethtool_gset(priv->slaves[slave_no].phy, ecmd);
1822         else
1823                 return -EOPNOTSUPP;
1824 }
1825
1826 static int cpsw_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
1827 {
1828         struct cpsw_priv *priv = netdev_priv(ndev);
1829         int slave_no = cpsw_slave_index(priv);
1830
1831         if (priv->slaves[slave_no].phy)
1832                 return phy_ethtool_sset(priv->slaves[slave_no].phy, ecmd);
1833         else
1834                 return -EOPNOTSUPP;
1835 }
1836
1837 static void cpsw_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1838 {
1839         struct cpsw_priv *priv = netdev_priv(ndev);
1840         int slave_no = cpsw_slave_index(priv);
1841
1842         wol->supported = 0;
1843         wol->wolopts = 0;
1844
1845         if (priv->slaves[slave_no].phy)
1846                 phy_ethtool_get_wol(priv->slaves[slave_no].phy, wol);
1847 }
1848
1849 static int cpsw_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1850 {
1851         struct cpsw_priv *priv = netdev_priv(ndev);
1852         int slave_no = cpsw_slave_index(priv);
1853
1854         if (priv->slaves[slave_no].phy)
1855                 return phy_ethtool_set_wol(priv->slaves[slave_no].phy, wol);
1856         else
1857                 return -EOPNOTSUPP;
1858 }
1859
1860 static void cpsw_get_pauseparam(struct net_device *ndev,
1861                                 struct ethtool_pauseparam *pause)
1862 {
1863         struct cpsw_priv *priv = netdev_priv(ndev);
1864
1865         pause->autoneg = AUTONEG_DISABLE;
1866         pause->rx_pause = priv->rx_pause ? true : false;
1867         pause->tx_pause = priv->tx_pause ? true : false;
1868 }
1869
1870 static int cpsw_set_pauseparam(struct net_device *ndev,
1871                                struct ethtool_pauseparam *pause)
1872 {
1873         struct cpsw_priv *priv = netdev_priv(ndev);
1874         bool link;
1875
1876         priv->rx_pause = pause->rx_pause ? true : false;
1877         priv->tx_pause = pause->tx_pause ? true : false;
1878
1879         for_each_slave(priv, _cpsw_adjust_link, priv, &link);
1880
1881         return 0;
1882 }
1883
1884 static const struct ethtool_ops cpsw_ethtool_ops = {
1885         .get_drvinfo    = cpsw_get_drvinfo,
1886         .get_msglevel   = cpsw_get_msglevel,
1887         .set_msglevel   = cpsw_set_msglevel,
1888         .get_link       = ethtool_op_get_link,
1889         .get_ts_info    = cpsw_get_ts_info,
1890         .get_settings   = cpsw_get_settings,
1891         .set_settings   = cpsw_set_settings,
1892         .get_coalesce   = cpsw_get_coalesce,
1893         .set_coalesce   = cpsw_set_coalesce,
1894         .get_sset_count         = cpsw_get_sset_count,
1895         .get_strings            = cpsw_get_strings,
1896         .get_ethtool_stats      = cpsw_get_ethtool_stats,
1897         .get_pauseparam         = cpsw_get_pauseparam,
1898         .set_pauseparam         = cpsw_set_pauseparam,
1899         .get_wol        = cpsw_get_wol,
1900         .set_wol        = cpsw_set_wol,
1901         .get_regs_len   = cpsw_get_regs_len,
1902         .get_regs       = cpsw_get_regs,
1903 };
1904
1905 static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
1906                             u32 slave_reg_ofs, u32 sliver_reg_ofs)
1907 {
1908         void __iomem            *regs = priv->regs;
1909         int                     slave_num = slave->slave_num;
1910         struct cpsw_slave_data  *data = priv->data.slave_data + slave_num;
1911
1912         slave->data     = data;
1913         slave->regs     = regs + slave_reg_ofs;
1914         slave->sliver   = regs + sliver_reg_ofs;
1915         slave->port_vlan = data->dual_emac_res_vlan;
1916 }
1917
1918 static int cpsw_probe_dt(struct cpsw_platform_data *data,
1919                          struct platform_device *pdev)
1920 {
1921         struct device_node *node = pdev->dev.of_node;
1922         struct device_node *slave_node;
1923         int i = 0, ret;
1924         u32 prop;
1925
1926         if (!node)
1927                 return -EINVAL;
1928
1929         if (of_property_read_u32(node, "slaves", &prop)) {
1930                 dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
1931                 return -EINVAL;
1932         }
1933         data->slaves = prop;
1934
1935         if (of_property_read_u32(node, "active_slave", &prop)) {
1936                 dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
1937                 return -EINVAL;
1938         }
1939         data->active_slave = prop;
1940
1941         if (of_property_read_u32(node, "cpts_clock_mult", &prop)) {
1942                 dev_err(&pdev->dev, "Missing cpts_clock_mult property in the DT.\n");
1943                 return -EINVAL;
1944         }
1945         data->cpts_clock_mult = prop;
1946
1947         if (of_property_read_u32(node, "cpts_clock_shift", &prop)) {
1948                 dev_err(&pdev->dev, "Missing cpts_clock_shift property in the DT.\n");
1949                 return -EINVAL;
1950         }
1951         data->cpts_clock_shift = prop;
1952
1953         data->slave_data = devm_kzalloc(&pdev->dev, data->slaves
1954                                         * sizeof(struct cpsw_slave_data),
1955                                         GFP_KERNEL);
1956         if (!data->slave_data)
1957                 return -ENOMEM;
1958
1959         if (of_property_read_u32(node, "cpdma_channels", &prop)) {
1960                 dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
1961                 return -EINVAL;
1962         }
1963         data->channels = prop;
1964
1965         if (of_property_read_u32(node, "ale_entries", &prop)) {
1966                 dev_err(&pdev->dev, "Missing ale_entries property in the DT.\n");
1967                 return -EINVAL;
1968         }
1969         data->ale_entries = prop;
1970
1971         if (of_property_read_u32(node, "bd_ram_size", &prop)) {
1972                 dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
1973                 return -EINVAL;
1974         }
1975         data->bd_ram_size = prop;
1976
1977         if (of_property_read_u32(node, "rx_descs", &prop)) {
1978                 dev_err(&pdev->dev, "Missing rx_descs property in the DT.\n");
1979                 return -EINVAL;
1980         }
1981         data->rx_descs = prop;
1982
1983         if (of_property_read_u32(node, "mac_control", &prop)) {
1984                 dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
1985                 return -EINVAL;
1986         }
1987         data->mac_control = prop;
1988
1989         if (of_property_read_bool(node, "dual_emac"))
1990                 data->dual_emac = 1;
1991
1992         /*
1993          * Populate all the child nodes here...
1994          */
1995         ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
1996         /* We do not want to force this, as in some cases may not have child */
1997         if (ret)
1998                 dev_warn(&pdev->dev, "Doesn't have any child node\n");
1999
2000         for_each_child_of_node(node, slave_node) {
2001                 struct cpsw_slave_data *slave_data = data->slave_data + i;
2002                 const void *mac_addr = NULL;
2003                 u32 phyid;
2004                 int lenp;
2005                 const __be32 *parp;
2006                 struct device_node *mdio_node;
2007                 struct platform_device *mdio;
2008
2009                 /* This is no slave child node, continue */
2010                 if (strcmp(slave_node->name, "slave"))
2011                         continue;
2012
2013                 parp = of_get_property(slave_node, "phy_id", &lenp);
2014                 if ((parp == NULL) || (lenp != (sizeof(void *) * 2))) {
2015                         dev_err(&pdev->dev, "Missing slave[%d] phy_id property\n", i);
2016                         goto no_phy_slave;
2017                 }
2018                 mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
2019                 phyid = be32_to_cpup(parp+1);
2020                 mdio = of_find_device_by_node(mdio_node);
2021                 of_node_put(mdio_node);
2022                 if (!mdio) {
2023                         dev_err(&pdev->dev, "Missing mdio platform device\n");
2024                         return -EINVAL;
2025                 }
2026                 snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
2027                          PHY_ID_FMT, mdio->name, phyid);
2028
2029                 slave_data->phy_if = of_get_phy_mode(slave_node);
2030                 if (slave_data->phy_if < 0) {
2031                         dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
2032                                 i);
2033                         return slave_data->phy_if;
2034                 }
2035
2036 no_phy_slave:
2037                 mac_addr = of_get_mac_address(slave_node);
2038                 if (mac_addr) {
2039                         memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN);
2040                 } else {
2041                         if (of_machine_is_compatible("ti,am33xx")) {
2042                                 ret = cpsw_am33xx_cm_get_macid(&pdev->dev,
2043                                                         0x630, i,
2044                                                         slave_data->mac_addr);
2045                                 if (ret)
2046                                         return ret;
2047                         }
2048                 }
2049                 if (data->dual_emac) {
2050                         if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
2051                                                  &prop)) {
2052                                 dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
2053                                 slave_data->dual_emac_res_vlan = i+1;
2054                                 dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
2055                                         slave_data->dual_emac_res_vlan, i);
2056                         } else {
2057                                 slave_data->dual_emac_res_vlan = prop;
2058                         }
2059                 }
2060
2061                 i++;
2062                 if (i == data->slaves)
2063                         break;
2064         }
2065
2066         return 0;
2067 }
2068
2069 static int cpsw_probe_dual_emac(struct platform_device *pdev,
2070                                 struct cpsw_priv *priv)
2071 {
2072         struct cpsw_platform_data       *data = &priv->data;
2073         struct net_device               *ndev;
2074         struct cpsw_priv                *priv_sl2;
2075         int ret = 0, i;
2076
2077         ndev = alloc_etherdev(sizeof(struct cpsw_priv));
2078         if (!ndev) {
2079                 dev_err(&pdev->dev, "cpsw: error allocating net_device\n");
2080                 return -ENOMEM;
2081         }
2082
2083         priv_sl2 = netdev_priv(ndev);
2084         spin_lock_init(&priv_sl2->lock);
2085         priv_sl2->data = *data;
2086         priv_sl2->pdev = pdev;
2087         priv_sl2->ndev = ndev;
2088         priv_sl2->dev  = &ndev->dev;
2089         priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
2090         priv_sl2->rx_packet_max = max(rx_packet_max, 128);
2091
2092         if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
2093                 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
2094                         ETH_ALEN);
2095                 dev_info(&pdev->dev, "cpsw: Detected MACID = %pM\n", priv_sl2->mac_addr);
2096         } else {
2097                 random_ether_addr(priv_sl2->mac_addr);
2098                 dev_info(&pdev->dev, "cpsw: Random MACID = %pM\n", priv_sl2->mac_addr);
2099         }
2100         memcpy(ndev->dev_addr, priv_sl2->mac_addr, ETH_ALEN);
2101
2102         priv_sl2->slaves = priv->slaves;
2103         priv_sl2->clk = priv->clk;
2104
2105         priv_sl2->coal_intvl = 0;
2106         priv_sl2->bus_freq_mhz = priv->bus_freq_mhz;
2107
2108         priv_sl2->regs = priv->regs;
2109         priv_sl2->host_port = priv->host_port;
2110         priv_sl2->host_port_regs = priv->host_port_regs;
2111         priv_sl2->wr_regs = priv->wr_regs;
2112         priv_sl2->hw_stats = priv->hw_stats;
2113         priv_sl2->dma = priv->dma;
2114         priv_sl2->txch = priv->txch;
2115         priv_sl2->rxch = priv->rxch;
2116         priv_sl2->ale = priv->ale;
2117         priv_sl2->emac_port = 1;
2118         priv->slaves[1].ndev = ndev;
2119         priv_sl2->cpts = priv->cpts;
2120         priv_sl2->version = priv->version;
2121
2122         for (i = 0; i < priv->num_irqs; i++) {
2123                 priv_sl2->irqs_table[i] = priv->irqs_table[i];
2124                 priv_sl2->num_irqs = priv->num_irqs;
2125         }
2126         ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2127
2128         ndev->netdev_ops = &cpsw_netdev_ops;
2129         ndev->ethtool_ops = &cpsw_ethtool_ops;
2130         netif_napi_add(ndev, &priv_sl2->napi, cpsw_poll, CPSW_POLL_WEIGHT);
2131
2132         /* register the network device */
2133         SET_NETDEV_DEV(ndev, &pdev->dev);
2134         ret = register_netdev(ndev);
2135         if (ret) {
2136                 dev_err(&pdev->dev, "cpsw: error registering net device\n");
2137                 free_netdev(ndev);
2138                 ret = -ENODEV;
2139         }
2140
2141         return ret;
2142 }
2143
2144 static int cpsw_probe(struct platform_device *pdev)
2145 {
2146         struct cpsw_platform_data       *data;
2147         struct net_device               *ndev;
2148         struct cpsw_priv                *priv;
2149         struct cpdma_params             dma_params;
2150         struct cpsw_ale_params          ale_params;
2151         void __iomem                    *ss_regs;
2152         struct resource                 *res, *ss_res;
2153         u32 slave_offset, sliver_offset, slave_size;
2154         int ret = 0, i;
2155         int irq;
2156
2157         ndev = alloc_etherdev(sizeof(struct cpsw_priv));
2158         if (!ndev) {
2159                 dev_err(&pdev->dev, "error allocating net_device\n");
2160                 return -ENOMEM;
2161         }
2162
2163         platform_set_drvdata(pdev, ndev);
2164         priv = netdev_priv(ndev);
2165         spin_lock_init(&priv->lock);
2166         priv->pdev = pdev;
2167         priv->ndev = ndev;
2168         priv->dev  = &ndev->dev;
2169         priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
2170         priv->rx_packet_max = max(rx_packet_max, 128);
2171         priv->cpts = devm_kzalloc(&pdev->dev, sizeof(struct cpts), GFP_KERNEL);
2172         priv->irq_enabled = true;
2173         if (!priv->cpts) {
2174                 dev_err(&pdev->dev, "error allocating cpts\n");
2175                 ret = -ENOMEM;
2176                 goto clean_ndev_ret;
2177         }
2178
2179         /*
2180          * This may be required here for child devices.
2181          */
2182         pm_runtime_enable(&pdev->dev);
2183
2184         /* Select default pin state */
2185         pinctrl_pm_select_default_state(&pdev->dev);
2186
2187         if (cpsw_probe_dt(&priv->data, pdev)) {
2188                 dev_err(&pdev->dev, "cpsw: platform data missing\n");
2189                 ret = -ENODEV;
2190                 goto clean_runtime_disable_ret;
2191         }
2192         data = &priv->data;
2193
2194         if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
2195                 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
2196                 dev_info(&pdev->dev, "Detected MACID = %pM\n", priv->mac_addr);
2197         } else {
2198                 eth_random_addr(priv->mac_addr);
2199                 dev_info(&pdev->dev, "Random MACID = %pM\n", priv->mac_addr);
2200         }
2201
2202         memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
2203
2204         priv->slaves = devm_kzalloc(&pdev->dev,
2205                                     sizeof(struct cpsw_slave) * data->slaves,
2206                                     GFP_KERNEL);
2207         if (!priv->slaves) {
2208                 ret = -ENOMEM;
2209                 goto clean_runtime_disable_ret;
2210         }
2211         for (i = 0; i < data->slaves; i++)
2212                 priv->slaves[i].slave_num = i;
2213
2214         priv->slaves[0].ndev = ndev;
2215         priv->emac_port = 0;
2216
2217         priv->clk = devm_clk_get(&pdev->dev, "fck");
2218         if (IS_ERR(priv->clk)) {
2219                 dev_err(priv->dev, "fck is not found\n");
2220                 ret = -ENODEV;
2221                 goto clean_runtime_disable_ret;
2222         }
2223         priv->coal_intvl = 0;
2224         priv->bus_freq_mhz = clk_get_rate(priv->clk) / 1000000;
2225
2226         ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2227         ss_regs = devm_ioremap_resource(&pdev->dev, ss_res);
2228         if (IS_ERR(ss_regs)) {
2229                 ret = PTR_ERR(ss_regs);
2230                 goto clean_runtime_disable_ret;
2231         }
2232         priv->regs = ss_regs;
2233         priv->host_port = HOST_PORT_NUM;
2234
2235         /* Need to enable clocks with runtime PM api to access module
2236          * registers
2237          */
2238         pm_runtime_get_sync(&pdev->dev);
2239         priv->version = readl(&priv->regs->id_ver);
2240         pm_runtime_put_sync(&pdev->dev);
2241
2242         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2243         priv->wr_regs = devm_ioremap_resource(&pdev->dev, res);
2244         if (IS_ERR(priv->wr_regs)) {
2245                 ret = PTR_ERR(priv->wr_regs);
2246                 goto clean_runtime_disable_ret;
2247         }
2248
2249         memset(&dma_params, 0, sizeof(dma_params));
2250         memset(&ale_params, 0, sizeof(ale_params));
2251
2252         switch (priv->version) {
2253         case CPSW_VERSION_1:
2254                 priv->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
2255                 priv->cpts->reg      = ss_regs + CPSW1_CPTS_OFFSET;
2256                 priv->hw_stats       = ss_regs + CPSW1_HW_STATS;
2257                 dma_params.dmaregs   = ss_regs + CPSW1_CPDMA_OFFSET;
2258                 dma_params.txhdp     = ss_regs + CPSW1_STATERAM_OFFSET;
2259                 ale_params.ale_regs  = ss_regs + CPSW1_ALE_OFFSET;
2260                 slave_offset         = CPSW1_SLAVE_OFFSET;
2261                 slave_size           = CPSW1_SLAVE_SIZE;
2262                 sliver_offset        = CPSW1_SLIVER_OFFSET;
2263                 dma_params.desc_mem_phys = 0;
2264                 break;
2265         case CPSW_VERSION_2:
2266         case CPSW_VERSION_3:
2267         case CPSW_VERSION_4:
2268                 priv->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
2269                 priv->cpts->reg      = ss_regs + CPSW2_CPTS_OFFSET;
2270                 priv->hw_stats       = ss_regs + CPSW2_HW_STATS;
2271                 dma_params.dmaregs   = ss_regs + CPSW2_CPDMA_OFFSET;
2272                 dma_params.txhdp     = ss_regs + CPSW2_STATERAM_OFFSET;
2273                 ale_params.ale_regs  = ss_regs + CPSW2_ALE_OFFSET;
2274                 slave_offset         = CPSW2_SLAVE_OFFSET;
2275                 slave_size           = CPSW2_SLAVE_SIZE;
2276                 sliver_offset        = CPSW2_SLIVER_OFFSET;
2277                 dma_params.desc_mem_phys =
2278                         (u32 __force) ss_res->start + CPSW2_BD_OFFSET;
2279                 break;
2280         default:
2281                 dev_err(priv->dev, "unknown version 0x%08x\n", priv->version);
2282                 ret = -ENODEV;
2283                 goto clean_runtime_disable_ret;
2284         }
2285         for (i = 0; i < priv->data.slaves; i++) {
2286                 struct cpsw_slave *slave = &priv->slaves[i];
2287                 cpsw_slave_init(slave, priv, slave_offset, sliver_offset);
2288                 slave_offset  += slave_size;
2289                 sliver_offset += SLIVER_SIZE;
2290         }
2291
2292         dma_params.dev          = &pdev->dev;
2293         dma_params.rxthresh     = dma_params.dmaregs + CPDMA_RXTHRESH;
2294         dma_params.rxfree       = dma_params.dmaregs + CPDMA_RXFREE;
2295         dma_params.rxhdp        = dma_params.txhdp + CPDMA_RXHDP;
2296         dma_params.txcp         = dma_params.txhdp + CPDMA_TXCP;
2297         dma_params.rxcp         = dma_params.txhdp + CPDMA_RXCP;
2298
2299         dma_params.num_chan             = data->channels;
2300         dma_params.has_soft_reset       = true;
2301         dma_params.min_packet_size      = CPSW_MIN_PACKET_SIZE;
2302         dma_params.desc_mem_size        = data->bd_ram_size;
2303         dma_params.desc_align           = 16;
2304         dma_params.has_ext_regs         = true;
2305         dma_params.desc_hw_addr         = dma_params.desc_mem_phys;
2306
2307         priv->dma = cpdma_ctlr_create(&dma_params);
2308         if (!priv->dma) {
2309                 dev_err(priv->dev, "error initializing dma\n");
2310                 ret = -ENOMEM;
2311                 goto clean_runtime_disable_ret;
2312         }
2313
2314         priv->txch = cpdma_chan_create(priv->dma, tx_chan_num(0),
2315                                        cpsw_tx_handler);
2316         priv->rxch = cpdma_chan_create(priv->dma, rx_chan_num(0),
2317                                        cpsw_rx_handler);
2318
2319         if (WARN_ON(!priv->txch || !priv->rxch)) {
2320                 dev_err(priv->dev, "error initializing dma channels\n");
2321                 ret = -ENOMEM;
2322                 goto clean_dma_ret;
2323         }
2324
2325         ale_params.dev                  = &ndev->dev;
2326         ale_params.ale_ageout           = ale_ageout;
2327         ale_params.ale_entries          = data->ale_entries;
2328         ale_params.ale_ports            = data->slaves;
2329
2330         priv->ale = cpsw_ale_create(&ale_params);
2331         if (!priv->ale) {
2332                 dev_err(priv->dev, "error initializing ale engine\n");
2333                 ret = -ENODEV;
2334                 goto clean_dma_ret;
2335         }
2336
2337         ndev->irq = platform_get_irq(pdev, 1);
2338         if (ndev->irq < 0) {
2339                 dev_err(priv->dev, "error getting irq resource\n");
2340                 ret = -ENOENT;
2341                 goto clean_ale_ret;
2342         }
2343
2344         /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
2345          * MISC IRQs which are always kept disabled with this driver so
2346          * we will not request them.
2347          *
2348          * If anyone wants to implement support for those, make sure to
2349          * first request and append them to irqs_table array.
2350          */
2351
2352         /* RX IRQ */
2353         irq = platform_get_irq(pdev, 1);
2354         if (irq < 0)
2355                 goto clean_ale_ret;
2356
2357         priv->irqs_table[0] = irq;
2358         ret = devm_request_irq(&pdev->dev, irq, cpsw_rx_interrupt,
2359                                0, dev_name(&pdev->dev), priv);
2360         if (ret < 0) {
2361                 dev_err(priv->dev, "error attaching irq (%d)\n", ret);
2362                 goto clean_ale_ret;
2363         }
2364
2365         /* TX IRQ */
2366         irq = platform_get_irq(pdev, 2);
2367         if (irq < 0)
2368                 goto clean_ale_ret;
2369
2370         priv->irqs_table[1] = irq;
2371         ret = devm_request_irq(&pdev->dev, irq, cpsw_tx_interrupt,
2372                                0, dev_name(&pdev->dev), priv);
2373         if (ret < 0) {
2374                 dev_err(priv->dev, "error attaching irq (%d)\n", ret);
2375                 goto clean_ale_ret;
2376         }
2377         priv->num_irqs = 2;
2378
2379         ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
2380
2381         ndev->netdev_ops = &cpsw_netdev_ops;
2382         ndev->ethtool_ops = &cpsw_ethtool_ops;
2383         netif_napi_add(ndev, &priv->napi, cpsw_poll, CPSW_POLL_WEIGHT);
2384
2385         /* register the network device */
2386         SET_NETDEV_DEV(ndev, &pdev->dev);
2387         ret = register_netdev(ndev);
2388         if (ret) {
2389                 dev_err(priv->dev, "error registering net device\n");
2390                 ret = -ENODEV;
2391                 goto clean_ale_ret;
2392         }
2393
2394         cpsw_notice(priv, probe, "initialized device (regs %pa, irq %d)\n",
2395                     &ss_res->start, ndev->irq);
2396
2397         if (priv->data.dual_emac) {
2398                 ret = cpsw_probe_dual_emac(pdev, priv);
2399                 if (ret) {
2400                         cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
2401                         goto clean_ale_ret;
2402                 }
2403         }
2404
2405         return 0;
2406
2407 clean_ale_ret:
2408         cpsw_ale_destroy(priv->ale);
2409 clean_dma_ret:
2410         cpdma_chan_destroy(priv->txch);
2411         cpdma_chan_destroy(priv->rxch);
2412         cpdma_ctlr_destroy(priv->dma);
2413 clean_runtime_disable_ret:
2414         pm_runtime_disable(&pdev->dev);
2415 clean_ndev_ret:
2416         free_netdev(priv->ndev);
2417         return ret;
2418 }
2419
2420 static int cpsw_remove_child_device(struct device *dev, void *c)
2421 {
2422         struct platform_device *pdev = to_platform_device(dev);
2423
2424         of_device_unregister(pdev);
2425
2426         return 0;
2427 }
2428
2429 static int cpsw_remove(struct platform_device *pdev)
2430 {
2431         struct net_device *ndev = platform_get_drvdata(pdev);
2432         struct cpsw_priv *priv = netdev_priv(ndev);
2433
2434         if (priv->data.dual_emac)
2435                 unregister_netdev(cpsw_get_slave_ndev(priv, 1));
2436         unregister_netdev(ndev);
2437
2438         cpsw_ale_destroy(priv->ale);
2439         cpdma_chan_destroy(priv->txch);
2440         cpdma_chan_destroy(priv->rxch);
2441         cpdma_ctlr_destroy(priv->dma);
2442         pm_runtime_disable(&pdev->dev);
2443         device_for_each_child(&pdev->dev, NULL, cpsw_remove_child_device);
2444         if (priv->data.dual_emac)
2445                 free_netdev(cpsw_get_slave_ndev(priv, 1));
2446         free_netdev(ndev);
2447         return 0;
2448 }
2449
2450 #ifdef CONFIG_PM_SLEEP
2451 static int cpsw_suspend(struct device *dev)
2452 {
2453         struct platform_device  *pdev = to_platform_device(dev);
2454         struct net_device       *ndev = platform_get_drvdata(pdev);
2455         struct cpsw_priv        *priv = netdev_priv(ndev);
2456
2457         if (priv->data.dual_emac) {
2458                 int i;
2459
2460                 for (i = 0; i < priv->data.slaves; i++) {
2461                         if (netif_running(priv->slaves[i].ndev))
2462                                 cpsw_ndo_stop(priv->slaves[i].ndev);
2463                         soft_reset_slave(priv->slaves + i);
2464                 }
2465         } else {
2466                 if (netif_running(ndev))
2467                         cpsw_ndo_stop(ndev);
2468                 for_each_slave(priv, soft_reset_slave);
2469         }
2470
2471         pm_runtime_put_sync(&pdev->dev);
2472
2473         /* Select sleep pin state */
2474         pinctrl_pm_select_sleep_state(&pdev->dev);
2475
2476         return 0;
2477 }
2478
2479 static int cpsw_resume(struct device *dev)
2480 {
2481         struct platform_device  *pdev = to_platform_device(dev);
2482         struct net_device       *ndev = platform_get_drvdata(pdev);
2483         struct cpsw_priv        *priv = netdev_priv(ndev);
2484
2485         pm_runtime_get_sync(&pdev->dev);
2486
2487         /* Select default pin state */
2488         pinctrl_pm_select_default_state(&pdev->dev);
2489
2490         if (priv->data.dual_emac) {
2491                 int i;
2492
2493                 for (i = 0; i < priv->data.slaves; i++) {
2494                         if (netif_running(priv->slaves[i].ndev))
2495                                 cpsw_ndo_open(priv->slaves[i].ndev);
2496                 }
2497         } else {
2498                 if (netif_running(ndev))
2499                         cpsw_ndo_open(ndev);
2500         }
2501         return 0;
2502 }
2503 #endif
2504
2505 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
2506
2507 static const struct of_device_id cpsw_of_mtable[] = {
2508         { .compatible = "ti,cpsw", },
2509         { /* sentinel */ },
2510 };
2511 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
2512
2513 static struct platform_driver cpsw_driver = {
2514         .driver = {
2515                 .name    = "cpsw",
2516                 .pm      = &cpsw_pm_ops,
2517                 .of_match_table = cpsw_of_mtable,
2518         },
2519         .probe = cpsw_probe,
2520         .remove = cpsw_remove,
2521 };
2522
2523 static int __init cpsw_init(void)
2524 {
2525         return platform_driver_register(&cpsw_driver);
2526 }
2527 late_initcall(cpsw_init);
2528
2529 static void __exit cpsw_exit(void)
2530 {
2531         platform_driver_unregister(&cpsw_driver);
2532 }
2533 module_exit(cpsw_exit);
2534
2535 MODULE_LICENSE("GPL");
2536 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
2537 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
2538 MODULE_DESCRIPTION("TI CPSW Ethernet driver");