drivers/net/cpsw.c

   1 /*
   2  * CPSW Ethernet Switch Driver
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   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 <common.h>
  17 #include <command.h>
  18 #include <net.h>
  19 #include <miiphy.h>
  20 #include <malloc.h>
  21 #include <net.h>
  22 #include <netdev.h>
  23 #include <asm/errno.h>
  24 #include <asm/io.h>
  25 #include <phy.h>
  26 #include <asm/arch/cpu.h>
  27
  28 #define BITMASK(bits)           (BIT(bits) - 1)
  29 #define PHY_REG_MASK            0x1f
  30 #define PHY_ID_MASK             0x1f
  31 #define NUM_DESCS               (PKTBUFSRX * 2)
  32 #define PKT_MIN                 60
  33 #define PKT_MAX                 (1500 + 14 + 4 + 4)
  34 #define CLEAR_BIT               1
  35 #define GIGABITEN               BIT(7)
  36 #define FULLDUPLEXEN            BIT(0)
  37 #define MIIEN                   BIT(15)
  38
  39 /* DMA Registers */
  40 #define CPDMA_TXCONTROL         0x004
  41 #define CPDMA_RXCONTROL         0x014
  42 #define CPDMA_SOFTRESET         0x01c
  43 #define CPDMA_RXFREE            0x0e0
  44 #define CPDMA_TXHDP_VER1        0x100
  45 #define CPDMA_TXHDP_VER2        0x200
  46 #define CPDMA_RXHDP_VER1        0x120
  47 #define CPDMA_RXHDP_VER2        0x220
  48 #define CPDMA_TXCP_VER1         0x140
  49 #define CPDMA_TXCP_VER2         0x240
  50 #define CPDMA_RXCP_VER1         0x160
  51 #define CPDMA_RXCP_VER2         0x260
  52
  53 #define CPDMA_RAM_ADDR          0x4a102000
  54
  55 /* Descriptor mode bits */
  56 #define CPDMA_DESC_SOP          BIT(31)
  57 #define CPDMA_DESC_EOP          BIT(30)
  58 #define CPDMA_DESC_OWNER        BIT(29)
  59 #define CPDMA_DESC_EOQ          BIT(28)
  60
  61 /*
  62  * This timeout definition is a worst-case ultra defensive measure against
  63  * unexpected controller lock ups.  Ideally, we should never ever hit this
  64  * scenario in practice.
  65  */
  66 #define MDIO_TIMEOUT            100 /* msecs */
  67 #define CPDMA_TIMEOUT           100 /* msecs */
  68
  69 struct cpsw_mdio_regs {
  70         u32     version;
  71         u32     control;
  72 #define CONTROL_IDLE            BIT(31)
  73 #define CONTROL_ENABLE          BIT(30)
  74
  75         u32     alive;
  76         u32     link;
  77         u32     linkintraw;
  78         u32     linkintmasked;
  79         u32     __reserved_0[2];
  80         u32     userintraw;
  81         u32     userintmasked;
  82         u32     userintmaskset;
  83         u32     userintmaskclr;
  84         u32     __reserved_1[20];
  85
  86         struct {
  87                 u32             access;
  88                 u32             physel;
  89 #define USERACCESS_GO           BIT(31)
  90 #define USERACCESS_WRITE        BIT(30)
  91 #define USERACCESS_ACK          BIT(29)
  92 #define USERACCESS_READ         0
  93 #define USERACCESS_DATA         0xffff
  94         } user[0];
  95 };
  96
  97 struct cpsw_regs {
  98         u32     id_ver;
  99         u32     control;
 100         u32     soft_reset;
 101         u32     stat_port_en;
 102         u32     ptype;
 103 };
 104
 105 struct cpsw_slave_regs {
 106         u32     max_blks;
 107         u32     blk_cnt;
 108         u32     flow_thresh;
 109         u32     port_vlan;
 110         u32     tx_pri_map;
 111         u32     gap_thresh;
 112         u32     sa_lo;
 113         u32     sa_hi;
 114 };
 115
 116 struct cpsw_host_regs {
 117         u32     max_blks;
 118         u32     blk_cnt;
 119         u32     flow_thresh;
 120         u32     port_vlan;
 121         u32     tx_pri_map;
 122         u32     cpdma_tx_pri_map;
 123         u32     cpdma_rx_chan_map;
 124 };
 125
 126 struct cpsw_sliver_regs {
 127         u32     id_ver;
 128         u32     mac_control;
 129         u32     mac_status;
 130         u32     soft_reset;
 131         u32     rx_maxlen;
 132         u32     __reserved_0;
 133         u32     rx_pause;
 134         u32     tx_pause;
 135         u32     __reserved_1;
 136         u32     rx_pri_map;
 137 };
 138
 139 #define ALE_ENTRY_BITS          68
 140 #define ALE_ENTRY_WORDS         DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
 141
 142 /* ALE Registers */
 143 #define ALE_CONTROL             0x08
 144 #define ALE_UNKNOWNVLAN         0x18
 145 #define ALE_TABLE_CONTROL       0x20
 146 #define ALE_TABLE               0x34
 147 #define ALE_PORTCTL             0x40
 148
 149 #define ALE_TABLE_WRITE         BIT(31)
 150
 151 #define ALE_TYPE_FREE                   0
 152 #define ALE_TYPE_ADDR                   1
 153 #define ALE_TYPE_VLAN                   2
 154 #define ALE_TYPE_VLAN_ADDR              3
 155
 156 #define ALE_UCAST_PERSISTANT            0
 157 #define ALE_UCAST_UNTOUCHED             1
 158 #define ALE_UCAST_OUI                   2
 159 #define ALE_UCAST_TOUCHED               3
 160
 161 #define ALE_MCAST_FWD                   0
 162 #define ALE_MCAST_BLOCK_LEARN_FWD       1
 163 #define ALE_MCAST_FWD_LEARN             2
 164 #define ALE_MCAST_FWD_2                 3
 165
 166 enum cpsw_ale_port_state {
 167         ALE_PORT_STATE_DISABLE  = 0x00,
 168         ALE_PORT_STATE_BLOCK    = 0x01,
 169         ALE_PORT_STATE_LEARN    = 0x02,
 170         ALE_PORT_STATE_FORWARD  = 0x03,
 171 };
 172
 173 /* ALE unicast entry flags - passed into cpsw_ale_add_ucast() */
 174 #define ALE_SECURE      1
 175 #define ALE_BLOCKED     2
 176
 177 struct cpsw_slave {
 178         struct cpsw_slave_regs          *regs;
 179         struct cpsw_sliver_regs         *sliver;
 180         int                             slave_num;
 181         u32                             mac_control;
 182         struct cpsw_slave_data          *data;
 183 };
 184
 185 struct cpdma_desc {
 186         /* hardware fields */
 187         u32                     hw_next;
 188         u32                     hw_buffer;
 189         u32                     hw_len;
 190         u32                     hw_mode;
 191 } __attribute__((aligned(CONFIG_SYS_CACHELINE_SIZE)));
 192
 193 struct cpsw_desc {
 194         void *sw_buffer;
 195         struct cpsw_desc *next;
 196         struct cpdma_desc *dma_desc;
 197 };
 198
 199 struct cpdma_chan {
 200         struct cpsw_desc        *head, *tail;
 201         void                    *hdp, *cp, *rxfree;
 202 };
 203
 204 #define desc_write(desc, fld, val)      __raw_writel((u32)(val), &(desc)->dma_desc->fld)
 205 #define desc_read(desc, fld)            __raw_readl(&(desc)->dma_desc->fld)
 206 #define desc_read_ptr(desc, fld)        ((void *)__raw_readl(&(desc)->dma_desc->fld))
 207
 208 #define chan_write(chan, fld, val)      __raw_writel((u32)(val), (chan)->fld)
 209 #define chan_read(chan, fld)            __raw_readl((chan)->fld)
 210 #define chan_read_ptr(chan, fld)        ((void *)__raw_readl((chan)->fld))
 211
 212 #define for_each_slave(slave, priv) \
 213         for (slave = (priv)->slaves; slave != (priv)->slaves + \
 214                                 (priv)->data->slaves; slave++)
 215
 216 struct cpsw_priv {
 217         struct eth_device               *dev;
 218         struct cpsw_platform_data       *data;
 219         int                             host_port;
 220
 221         struct cpsw_regs                *regs;
 222         void                            *dma_regs;
 223         struct cpsw_host_regs           *host_port_regs;
 224         void                            *ale_regs;
 225
 226         struct cpsw_desc                descs[NUM_DESCS];
 227         struct cpsw_desc                *desc_free;
 228         struct cpdma_chan               rx_chan, tx_chan;
 229
 230         struct cpsw_slave               *slaves;
 231         struct phy_device               *phydev;
 232         struct mii_dev                  *bus;
 233 };
 234
 235 static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
 236 {
 237         int idx;
 238
 239         idx    = start / 32;
 240         start -= idx * 32;
 241         idx    = 2 - idx; /* flip */
 242         return (ale_entry[idx] >> start) & BITMASK(bits);
 243 }
 244
 245 static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
 246                                       u32 value)
 247 {
 248         int idx;
 249
 250         value &= BITMASK(bits);
 251         idx    = start / 32;
 252         start -= idx * 32;
 253         idx    = 2 - idx; /* flip */
 254         ale_entry[idx] &= ~(BITMASK(bits) << start);
 255         ale_entry[idx] |=  (value << start);
 256 }
 257
 258 #define DEFINE_ALE_FIELD(name, start, bits)                             \
 259 static inline int cpsw_ale_get_##name(u32 *ale_entry)                   \
 260 {                                                                       \
 261         return cpsw_ale_get_field(ale_entry, start, bits);              \
 262 }                                                                       \
 263 static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value)       \
 264 {                                                                       \
 265         cpsw_ale_set_field(ale_entry, start, bits, value);              \
 266 }
 267
 268 DEFINE_ALE_FIELD(entry_type,            60,     2)
 269 DEFINE_ALE_FIELD(mcast_state,           62,     2)
 270 DEFINE_ALE_FIELD(port_mask,             66,     3)
 271 DEFINE_ALE_FIELD(ucast_type,            62,     2)
 272 DEFINE_ALE_FIELD(port_num,              66,     2)
 273 DEFINE_ALE_FIELD(blocked,               65,     1)
 274 DEFINE_ALE_FIELD(secure,                64,     1)
 275 DEFINE_ALE_FIELD(mcast,                 40,     1)
 276
 277 /* The MAC address field in the ALE entry cannot be macroized as above */
 278 static inline void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
 279 {
 280         int i;
 281
 282         for (i = 0; i < 6; i++)
 283                 addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
 284 }
 285
 286 static inline void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
 287 {
 288         int i;
 289
 290         for (i = 0; i < 6; i++)
 291                 cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
 292 }
 293
 294 static int cpsw_ale_read(struct cpsw_priv *priv, int idx, u32 *ale_entry)
 295 {
 296         int i;
 297
 298         __raw_writel(idx, priv->ale_regs + ALE_TABLE_CONTROL);
 299
 300         for (i = 0; i < ALE_ENTRY_WORDS; i++)
 301                 ale_entry[i] = __raw_readl(priv->ale_regs + ALE_TABLE + 4 * i);
 302
 303         return idx;
 304 }
 305
 306 static int cpsw_ale_write(struct cpsw_priv *priv, int idx, u32 *ale_entry)
 307 {
 308         int i;
 309
 310         for (i = 0; i < ALE_ENTRY_WORDS; i++)
 311                 __raw_writel(ale_entry[i], priv->ale_regs + ALE_TABLE + 4 * i);
 312
 313         __raw_writel(idx | ALE_TABLE_WRITE, priv->ale_regs + ALE_TABLE_CONTROL);
 314
 315         return idx;
 316 }
 317
 318 static int cpsw_ale_match_addr(struct cpsw_priv *priv, u8* addr)
 319 {
 320         u32 ale_entry[ALE_ENTRY_WORDS];
 321         int type, idx;
 322
 323         for (idx = 0; idx < priv->data->ale_entries; idx++) {
 324                 u8 entry_addr[6];
 325
 326                 cpsw_ale_read(priv, idx, ale_entry);
 327                 type = cpsw_ale_get_entry_type(ale_entry);
 328                 if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
 329                         continue;
 330                 cpsw_ale_get_addr(ale_entry, entry_addr);
 331                 if (memcmp(entry_addr, addr, 6) == 0)
 332                         return idx;
 333         }
 334         return -ENOENT;
 335 }
 336
 337 static int cpsw_ale_match_free(struct cpsw_priv *priv)
 338 {
 339         u32 ale_entry[ALE_ENTRY_WORDS];
 340         int type, idx;
 341
 342         for (idx = 0; idx < priv->data->ale_entries; idx++) {
 343                 cpsw_ale_read(priv, idx, ale_entry);
 344                 type = cpsw_ale_get_entry_type(ale_entry);
 345                 if (type == ALE_TYPE_FREE)
 346                         return idx;
 347         }
 348         return -ENOENT;
 349 }
 350
 351 static int cpsw_ale_find_ageable(struct cpsw_priv *priv)
 352 {
 353         u32 ale_entry[ALE_ENTRY_WORDS];
 354         int type, idx;
 355
 356         for (idx = 0; idx < priv->data->ale_entries; idx++) {
 357                 cpsw_ale_read(priv, idx, ale_entry);
 358                 type = cpsw_ale_get_entry_type(ale_entry);
 359                 if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
 360                         continue;
 361                 if (cpsw_ale_get_mcast(ale_entry))
 362                         continue;
 363                 type = cpsw_ale_get_ucast_type(ale_entry);
 364                 if (type != ALE_UCAST_PERSISTANT &&
 365                     type != ALE_UCAST_OUI)
 366                         return idx;
 367         }
 368         return -ENOENT;
 369 }
 370
 371 static int cpsw_ale_add_ucast(struct cpsw_priv *priv, u8 *addr,
 372                               int port, int flags)
 373 {
 374         u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 375         int idx;
 376
 377         cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
 378         cpsw_ale_set_addr(ale_entry, addr);
 379         cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
 380         cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
 381         cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
 382         cpsw_ale_set_port_num(ale_entry, port);
 383
 384         idx = cpsw_ale_match_addr(priv, addr);
 385         if (idx < 0)
 386                 idx = cpsw_ale_match_free(priv);
 387         if (idx < 0)
 388                 idx = cpsw_ale_find_ageable(priv);
 389         if (idx < 0)
 390                 return -ENOMEM;
 391
 392         cpsw_ale_write(priv, idx, ale_entry);
 393         return 0;
 394 }
 395
 396 static int cpsw_ale_add_mcast(struct cpsw_priv *priv, u8 *addr, int port_mask)
 397 {
 398         u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
 399         int idx, mask;
 400
 401         idx = cpsw_ale_match_addr(priv, addr);
 402         if (idx >= 0)
 403                 cpsw_ale_read(priv, idx, ale_entry);
 404
 405         cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
 406         cpsw_ale_set_addr(ale_entry, addr);
 407         cpsw_ale_set_mcast_state(ale_entry, ALE_MCAST_FWD_2);
 408
 409         mask = cpsw_ale_get_port_mask(ale_entry);
 410         port_mask |= mask;
 411         cpsw_ale_set_port_mask(ale_entry, port_mask);
 412
 413         if (idx < 0)
 414                 idx = cpsw_ale_match_free(priv);
 415         if (idx < 0)
 416                 idx = cpsw_ale_find_ageable(priv);
 417         if (idx < 0)
 418                 return -ENOMEM;
 419
 420         cpsw_ale_write(priv, idx, ale_entry);
 421         return 0;
 422 }
 423
 424 static inline void cpsw_ale_control(struct cpsw_priv *priv, int bit, int val)
 425 {
 426         u32 tmp, mask = BIT(bit);
 427
 428         tmp  = __raw_readl(priv->ale_regs + ALE_CONTROL);
 429         tmp &= ~mask;
 430         tmp |= val ? mask : 0;
 431         __raw_writel(tmp, priv->ale_regs + ALE_CONTROL);
 432 }
 433
 434 #define cpsw_ale_enable(priv, val)      cpsw_ale_control(priv, 31, val)
 435 #define cpsw_ale_clear(priv, val)       cpsw_ale_control(priv, 30, val)
 436 #define cpsw_ale_vlan_aware(priv, val)  cpsw_ale_control(priv,  2, val)
 437
 438 static inline void cpsw_ale_port_state(struct cpsw_priv *priv, int port,
 439                                        int val)
 440 {
 441         int offset = ALE_PORTCTL + 4 * port;
 442         u32 tmp, mask = 0x3;
 443
 444         tmp  = __raw_readl(priv->ale_regs + offset);
 445         tmp &= ~mask;
 446         tmp |= val & mask;
 447         __raw_writel(tmp, priv->ale_regs + offset);
 448 }
 449
 450 static struct cpsw_mdio_regs *mdio_regs;
 451
 452 /* wait until hardware is ready for another user access */
 453 static inline u32 wait_for_user_access(void)
 454 {
 455         int timeout = MDIO_TIMEOUT;
 456         u32 reg;
 457
 458         while ((reg = __raw_readl(&mdio_regs->user[0].access)) & USERACCESS_GO) {
 459                 udelay(1000);
 460                 if (--timeout <= 0) {
 461                         printf("TIMEOUT waiting for USERACCESS_GO\n");
 462                         break;
 463                 }
 464         }
 465
 466         return reg;
 467 }
 468
 469 /* wait until hardware state machine is idle */
 470 static inline void wait_for_idle(void)
 471 {
 472         int timeout = MDIO_TIMEOUT;
 473
 474         while ((__raw_readl(&mdio_regs->control) & CONTROL_IDLE) == 0) {
 475                 if (--timeout <= 0) {
 476                         printf("TIMEOUT waiting for state machine idle\n");
 477                         break;
 478                 }
 479                 udelay(1000);
 480         }
 481 }
 482
 483 static int cpsw_mdio_read(struct mii_dev *bus, int phy_id,
 484                                 int dev_addr, int phy_reg)
 485 {
 486         unsigned short data;
 487         u32 reg;
 488
 489         if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
 490                 return -EINVAL;
 491
 492         if (wait_for_user_access() & USERACCESS_GO)
 493                 /* promote error from previous access */
 494                 return -ETIME;
 495
 496         reg = (USERACCESS_GO | USERACCESS_READ | (phy_reg << 21) |
 497                (phy_id << 16));
 498         __raw_writel(reg, &mdio_regs->user[0].access);
 499         reg = wait_for_user_access();
 500         if (reg & USERACCESS_GO)
 501                 return -ETIME;
 502
 503         data = (reg & USERACCESS_ACK) ? (reg & USERACCESS_DATA) : -1;
 504         return data;
 505 }
 506
 507 static int cpsw_mdio_write(struct mii_dev *bus, int phy_id, int dev_addr,
 508                                 int phy_reg, u16 data)
 509 {
 510         u32 reg;
 511
 512         if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
 513                 return -EINVAL;
 514
 515         if (wait_for_user_access() & USERACCESS_GO)
 516                 /* promote error from previous access */
 517                 return -ETIME;
 518
 519         reg = (USERACCESS_GO | USERACCESS_WRITE | (phy_reg << 21) |
 520                    (phy_id << 16) | (data & USERACCESS_DATA));
 521         __raw_writel(reg, &mdio_regs->user[0].access);
 522         if (wait_for_user_access() & USERACCESS_GO)
 523                 return -ETIME;
 524
 525         return 0;
 526 }
 527
 528 static void cpsw_mdio_init(char *name, u32 mdio_base, u32 div)
 529 {
 530         struct mii_dev *bus = mdio_alloc();
 531
 532         mdio_regs = (struct cpsw_mdio_regs *)mdio_base;
 533
 534         /* set enable and clock divider */
 535         __raw_writel(div | CONTROL_ENABLE, &mdio_regs->control);
 536
 537         /*
 538          * wait for scan logic to settle:
 539          * the scan time consists of (a) a large fixed component, and (b) a
 540          * small component that varies with the mii bus frequency.  These
 541          * were estimated using measurements at 1.1 and 2.2 MHz on tnetv107x
 542          * silicon.  Since the effect of (b) was found to be largely
 543          * negligible, we keep things simple here.
 544          */
 545         udelay(1000);
 546
 547         bus->read = cpsw_mdio_read;
 548         bus->write = cpsw_mdio_write;
 549         sprintf(bus->name, name);
 550
 551         mdio_register(bus);
 552 }
 553
 554 /* Set a self-clearing bit in a register, and wait for it to clear */
 555 static inline void setbit_and_wait_for_clear32(void *addr)
 556 {
 557         int loops = 0;
 558
 559         __raw_writel(CLEAR_BIT, addr);
 560         while (__raw_readl(addr) & CLEAR_BIT)
 561                 loops++;
 562         debug("%s: reset finished after %u loops\n", __func__, loops);
 563 }
 564
 565 #define mac_hi(mac)     (((mac)[0] << 0) | ((mac)[1] << 8) |    \
 566                          ((mac)[2] << 16) | ((mac)[3] << 24))
 567 #define mac_lo(mac)     (((mac)[4] << 0) | ((mac)[5] << 8))
 568
 569 static void cpsw_set_slave_mac(struct cpsw_slave *slave,
 570                                struct cpsw_priv *priv)
 571 {
 572         __raw_writel(mac_hi(priv->dev->enetaddr), &slave->regs->sa_hi);
 573         __raw_writel(mac_lo(priv->dev->enetaddr), &slave->regs->sa_lo);
 574 }
 575
 576 #define NUM_TRIES 50
 577 static void cpsw_slave_update_link(struct cpsw_slave *slave,
 578                                    struct cpsw_priv *priv, int *link)
 579 {
 580         struct phy_device *phy = priv->phydev;
 581         u32 mac_control = 0;
 582         int retries = NUM_TRIES;
 583
 584         do {
 585                 phy_startup(phy);
 586                 *link = phy->link;
 587
 588                 if (*link) { /* link up */
 589                         mac_control = priv->data->mac_control;
 590                         if (phy->speed == 1000)
 591                                 mac_control |= GIGABITEN;
 592                         if (phy->duplex == DUPLEX_FULL)
 593                                 mac_control |= FULLDUPLEXEN;
 594                         if (phy->speed == 100)
 595                                 mac_control |= MIIEN;
 596                 } else {
 597                         udelay(10000);
 598                 }
 599         } while (!*link && retries-- > 0);
 600         debug("%s: mac_control: %08x -> %08x after %u loops\n", __func__,
 601                 slave->mac_control, mac_control, NUM_TRIES - retries);
 602
 603         if (mac_control == slave->mac_control)
 604                 return;
 605
 606         if (mac_control) {
 607                 printf("link up on port %d, speed %d, %s duplex\n",
 608                                 slave->slave_num, phy->speed,
 609                                 (phy->duplex == DUPLEX_FULL) ? "full" : "half");
 610         } else {
 611                 printf("link down on port %d\n", slave->slave_num);
 612         }
 613
 614         __raw_writel(mac_control, &slave->sliver->mac_control);
 615         slave->mac_control = mac_control;
 616 }
 617
 618 static int cpsw_update_link(struct cpsw_priv *priv)
 619 {
 620         int link = 0;
 621         struct cpsw_slave *slave;
 622
 623         for_each_slave(slave, priv)
 624                 cpsw_slave_update_link(slave, priv, &link);
 625
 626         return link;
 627 }
 628
 629 static inline u32 cpsw_get_slave_port(struct cpsw_priv *priv, u32 slave_num)
 630 {
 631         if (priv->host_port == 0)
 632                 return slave_num + 1;
 633         else
 634                 return slave_num;
 635 }
 636
 637 static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv)
 638 {
 639         u32     slave_port;
 640
 641         debug("%s\n", __func__);
 642         setbit_and_wait_for_clear32(&slave->sliver->soft_reset);
 643
 644         /* setup priority mapping */
 645         __raw_writel(0x76543210, &slave->sliver->rx_pri_map);
 646         __raw_writel(0x33221100, &slave->regs->tx_pri_map);
 647
 648         /* setup max packet size, and mac address */
 649         __raw_writel(PKT_MAX, &slave->sliver->rx_maxlen);
 650         cpsw_set_slave_mac(slave, priv);
 651
 652         slave->mac_control = 0; /* no link yet */
 653
 654         /* enable forwarding */
 655         slave_port = cpsw_get_slave_port(priv, slave->slave_num);
 656         cpsw_ale_port_state(priv, slave_port, ALE_PORT_STATE_FORWARD);
 657
 658         cpsw_ale_add_mcast(priv, NetBcastAddr, 1 << slave_port);
 659 }
 660
 661 static void cpdma_desc_get(struct cpsw_desc *desc)
 662 {
 663         invalidate_dcache_range((u32)desc->dma_desc, (u32)(&desc->dma_desc[1]));
 664 }
 665
 666 static void cpdma_desc_put(struct cpsw_desc *desc)
 667 {
 668         flush_dcache_range((u32)desc->dma_desc, (u32)(&desc->dma_desc[1]));
 669 }
 670
 671 static struct cpsw_desc *cpdma_desc_alloc(struct cpsw_priv *priv)
 672 {
 673         struct cpsw_desc *desc = priv->desc_free;
 674
 675         if (desc) {
 676                 cpdma_desc_get(desc);
 677                 priv->desc_free = desc->next;
 678         }
 679         return desc;
 680 }
 681
 682 static void cpdma_desc_free(struct cpsw_priv *priv, struct cpsw_desc *desc)
 683 {
 684         if (desc) {
 685                 desc_write(desc, hw_next, priv->desc_free->dma_desc);
 686                 cpdma_desc_put(desc);
 687                 desc->next = priv->desc_free;
 688                 priv->desc_free = desc;
 689         }
 690 }
 691
 692 static int cpdma_submit(struct cpsw_priv *priv, struct cpdma_chan *chan,
 693                         void *buffer, int len)
 694 {
 695         struct cpsw_desc *desc, *prev;
 696         u32 mode;
 697
 698         if (!buffer) {
 699                 printf("ERROR: %s() NULL buffer\n", __func__);
 700                 return -EINVAL;
 701         }
 702
 703         flush_dcache_range((u32)buffer, (u32)buffer + len);
 704
 705         desc = cpdma_desc_alloc(priv);
 706         if (!desc)
 707                 return -ENOMEM;
 708
 709         debug("%s@%d: %cX desc %p DMA %p\n", __func__, __LINE__,
 710                 chan == &priv->rx_chan ? 'R' : 'T', desc, desc->dma_desc);
 711         if (len < PKT_MIN)
 712                 len = PKT_MIN;
 713
 714         mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
 715
 716         desc->next = NULL;
 717         desc_write(desc, hw_next,   0);
 718         desc_write(desc, hw_buffer, buffer);
 719         desc_write(desc, hw_len,    len);
 720         desc_write(desc, hw_mode,   mode | len);
 721
 722         desc->sw_buffer = buffer;
 723
 724         cpdma_desc_put(desc);
 725         if (!chan->head) {
 726                 /* simple case - first packet enqueued */
 727                 chan->head = desc;
 728                 chan->tail = desc;
 729                 chan_write(chan, hdp, desc->dma_desc);
 730                 goto done;
 731         }
 732
 733         /* not the first packet - enqueue at the tail */
 734         prev = chan->tail;
 735
 736         prev->next = desc;
 737         cpdma_desc_get(prev);
 738         desc_write(prev, hw_next, desc->dma_desc);
 739         cpdma_desc_put(prev);
 740
 741         chan->tail = desc;
 742
 743         /* next check if EOQ has been triggered already */
 744         if (desc_read(prev, hw_mode) & CPDMA_DESC_EOQ)
 745                 chan_write(chan, hdp, desc->dma_desc);
 746
 747 done:
 748         if (chan->rxfree)
 749                 chan_write(chan, rxfree, 1);
 750         debug("%s@%d\n", __func__, __LINE__);
 751         return 0;
 752 }
 753
 754 static int cpdma_process(struct cpsw_priv *priv, struct cpdma_chan *chan,
 755                          void **buffer, int *len)
 756 {
 757         struct cpsw_desc *desc = chan->head;
 758         u32 status;
 759
 760         if (!desc)
 761                 return -ENOENT;
 762
 763         cpdma_desc_get(desc);
 764
 765         status = desc_read(desc, hw_mode);
 766         if (status & CPDMA_DESC_OWNER)
 767                 return -EBUSY;
 768
 769         if (len)
 770                 *len = status & 0x7ff;
 771
 772         if (buffer)
 773                 *buffer = desc->sw_buffer;
 774         debug("%s@%d: buffer=%p\n", __func__, __LINE__, desc->sw_buffer);
 775
 776         chan->head = desc->next;
 777         chan_write(chan, cp, desc->dma_desc);
 778
 779         cpdma_desc_free(priv, desc);
 780         return 0;
 781 }
 782
 783 static int cpsw_init(struct eth_device *dev, bd_t *bis)
 784 {
 785         struct cpsw_priv        *priv = dev->priv;
 786         struct cpsw_slave       *slave;
 787         int i, ret;
 788
 789         debug("%s\n", __func__);
 790         /* soft reset the controller and initialize priv */
 791         setbit_and_wait_for_clear32(&priv->regs->soft_reset);
 792
 793         /* initialize and reset the address lookup engine */
 794         cpsw_ale_enable(priv, 1);
 795         cpsw_ale_clear(priv, 1);
 796         cpsw_ale_vlan_aware(priv, 0); /* vlan unaware mode */
 797
 798         /* setup host port priority mapping */
 799         __raw_writel(0x76543210, &priv->host_port_regs->cpdma_tx_pri_map);
 800         __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
 801
 802         /* disable priority elevation and enable statistics on all ports */
 803         __raw_writel(0, &priv->regs->ptype);
 804
 805         /* enable statistics collection only on the host port */
 806         __raw_writel(BIT(priv->host_port), &priv->regs->stat_port_en);
 807
 808         cpsw_ale_port_state(priv, priv->host_port, ALE_PORT_STATE_FORWARD);
 809
 810         cpsw_ale_add_ucast(priv, priv->dev->enetaddr, priv->host_port,
 811                            ALE_SECURE);
 812         cpsw_ale_add_mcast(priv, NetBcastAddr, 1 << priv->host_port);
 813
 814         for_each_slave(slave, priv)
 815                 cpsw_slave_init(slave, priv);
 816
 817         cpsw_update_link(priv);
 818
 819         /* init descriptor pool */
 820         for (i = 0; i < NUM_DESCS; i++) {
 821                 struct cpsw_desc *next_desc = (i < (NUM_DESCS - 1)) ?
 822                         &priv->descs[i + 1] : NULL;
 823
 824                 priv->descs[i].next = next_desc;
 825                 desc_write(&priv->descs[i], hw_next,
 826                         next_desc ? next_desc->dma_desc : 0);
 827                 cpdma_desc_put(&priv->descs[i]);
 828         }
 829         priv->desc_free = &priv->descs[0];
 830
 831         /* initialize channels */
 832         if (priv->data->version == CPSW_CTRL_VERSION_2) {
 833                 memset(&priv->rx_chan, 0, sizeof(struct cpdma_chan));
 834                 priv->rx_chan.hdp       = priv->dma_regs + CPDMA_RXHDP_VER2;
 835                 priv->rx_chan.cp        = priv->dma_regs + CPDMA_RXCP_VER2;
 836                 priv->rx_chan.rxfree    = priv->dma_regs + CPDMA_RXFREE;
 837
 838                 memset(&priv->tx_chan, 0, sizeof(struct cpdma_chan));
 839                 priv->tx_chan.hdp       = priv->dma_regs + CPDMA_TXHDP_VER2;
 840                 priv->tx_chan.cp        = priv->dma_regs + CPDMA_TXCP_VER2;
 841         } else {
 842                 memset(&priv->rx_chan, 0, sizeof(struct cpdma_chan));
 843                 priv->rx_chan.hdp       = priv->dma_regs + CPDMA_RXHDP_VER1;
 844                 priv->rx_chan.cp        = priv->dma_regs + CPDMA_RXCP_VER1;
 845                 priv->rx_chan.rxfree    = priv->dma_regs + CPDMA_RXFREE;
 846
 847                 memset(&priv->tx_chan, 0, sizeof(struct cpdma_chan));
 848                 priv->tx_chan.hdp       = priv->dma_regs + CPDMA_TXHDP_VER1;
 849                 priv->tx_chan.cp        = priv->dma_regs + CPDMA_TXCP_VER1;
 850         }
 851
 852         /* clear dma state */
 853         setbit_and_wait_for_clear32(priv->dma_regs + CPDMA_SOFTRESET);
 854
 855         if (priv->data->version == CPSW_CTRL_VERSION_2) {
 856                 for (i = 0; i < priv->data->channels; i++) {
 857                         __raw_writel(0, priv->dma_regs + CPDMA_RXHDP_VER2 + 4 * i);
 858                         __raw_writel(0, priv->dma_regs + CPDMA_RXFREE + 4 * i);
 859                         __raw_writel(0, priv->dma_regs + CPDMA_RXCP_VER2 + 4 * i);
 860                         __raw_writel(0, priv->dma_regs + CPDMA_TXHDP_VER2 + 4 * i);
 861                         __raw_writel(0, priv->dma_regs + CPDMA_TXCP_VER2 + 4 * i);
 862                 }
 863         } else {
 864                 for (i = 0; i < priv->data->channels; i++) {
 865                         __raw_writel(0, priv->dma_regs + CPDMA_RXHDP_VER1 + 4 * i);
 866                         __raw_writel(0, priv->dma_regs + CPDMA_RXFREE + 4 * i);
 867                         __raw_writel(0, priv->dma_regs + CPDMA_RXCP_VER1 + 4 * i);
 868                         __raw_writel(0, priv->dma_regs + CPDMA_TXHDP_VER1 + 4 * i);
 869                         __raw_writel(0, priv->dma_regs + CPDMA_TXCP_VER1 + 4 * i);
 870
 871                 }
 872         }
 873
 874         __raw_writel(1, priv->dma_regs + CPDMA_TXCONTROL);
 875         __raw_writel(1, priv->dma_regs + CPDMA_RXCONTROL);
 876
 877         /* submit rx descs */
 878         for (i = 0; i < PKTBUFSRX; i++) {
 879                 ret = cpdma_submit(priv, &priv->rx_chan, NetRxPackets[i],
 880                                    PKTSIZE);
 881                 if (ret < 0) {
 882                         printf("error %d submitting rx desc\n", ret);
 883                         break;
 884                 }
 885         }
 886
 887         return ret;
 888 }
 889
 890 static void cpsw_halt(struct eth_device *dev)
 891 {
 892         struct cpsw_priv        *priv = dev->priv;
 893
 894         writel(0, priv->dma_regs + CPDMA_TXCONTROL);
 895         writel(0, priv->dma_regs + CPDMA_RXCONTROL);
 896
 897         /* soft reset the controller and initialize priv */
 898         setbit_and_wait_for_clear32(&priv->regs->soft_reset);
 899
 900         /* clear dma state */
 901         setbit_and_wait_for_clear32(priv->dma_regs + CPDMA_SOFTRESET);
 902
 903         debug("%s\n", __func__);
 904         priv->data->control(0);
 905 }
 906
 907 static int cpsw_send(struct eth_device *dev, void *packet, int length)
 908 {
 909         struct cpsw_priv *priv = dev->priv;
 910         void *buffer;
 911         int len;
 912
 913         debug("%s@%d: sending packet %p..%p\n", __func__, __LINE__,
 914                 packet, packet + length - 1);
 915
 916         if (!priv->data->mac_control && !cpsw_update_link(priv)) {
 917                 printf("%s: Cannot send packet; link is down\n", __func__);
 918                 return -EIO;
 919         }
 920
 921         /* first reap completed packets */
 922         while (cpdma_process(priv, &priv->tx_chan, &buffer, &len) == 0)
 923                 /* NOP */;
 924
 925         return cpdma_submit(priv, &priv->tx_chan, packet, length);
 926 }
 927
 928 static int cpsw_recv(struct eth_device *dev)
 929 {
 930         struct cpsw_priv        *priv = dev->priv;
 931         void *buffer;
 932         int len;
 933
 934         while (cpdma_process(priv, &priv->rx_chan, &buffer, &len) == 0) {
 935                 if (buffer) {
 936                         NetReceive(buffer, len);
 937                         cpdma_submit(priv, &priv->rx_chan, buffer, PKTSIZE);
 938                 } else {
 939                         printf("NULL buffer returned from cpdma_process\n");
 940                         return -EIO;
 941                 }
 942         }
 943
 944         return 0;
 945 }
 946
 947 static void cpsw_slave_setup(struct cpsw_slave *slave, int slave_num,
 948                             struct cpsw_priv *priv)
 949 {
 950         void                    *regs = priv->regs;
 951         struct cpsw_slave_data  *data = priv->data->slave_data + slave_num;
 952
 953         debug("%s@%d: slave[%d] %p\n", __func__, __LINE__,
 954                 slave_num, slave);
 955         slave->slave_num = slave_num;
 956         slave->data     = data;
 957         slave->regs     = regs + data->slave_reg_ofs;
 958         slave->sliver   = regs + data->sliver_reg_ofs;
 959 }
 960
 961 static int cpsw_phy_init(struct eth_device *dev, struct cpsw_slave *slave)
 962 {
 963         struct cpsw_priv *priv = (struct cpsw_priv *)dev->priv;
 964         struct phy_device *phydev;
 965         u32 supported = (SUPPORTED_10baseT_Half |
 966                         SUPPORTED_10baseT_Full |
 967                         SUPPORTED_100baseT_Half |
 968                         SUPPORTED_100baseT_Full |
 969                         SUPPORTED_1000baseT_Full);
 970
 971         if (slave->data->phy_id < 0) {
 972                 u32 phy_addr;
 973
 974                 for (phy_addr = 0; phy_addr < 32; phy_addr++) {
 975                         debug("Trying to connect to PHY @ addr %02x\n",
 976                                 phy_addr);
 977                         phydev = phy_connect(priv->bus, phy_addr,
 978                                         dev, slave->data->phy_if);
 979                         if (phydev)
 980                                 break;
 981                 }
 982         } else {
 983                 phydev = phy_connect(priv->bus,
 984                                 slave->data->phy_id,
 985                                 dev,
 986                                 slave->data->phy_if);
 987         }
 988         if (!phydev) {
 989                 printf("Failed to connect to PHY\n");
 990                 return -EINVAL;
 991         }
 992
 993         phydev->supported &= supported;
 994         phydev->advertising = phydev->supported;
 995
 996         priv->phydev = phydev;
 997         phy_config(phydev);
 998
 999         return 0;
1000 }
1001
1002 int cpsw_register(struct cpsw_platform_data *data)
1003 {
1004         int ret = 1;
1005         struct cpsw_priv        *priv;
1006         struct cpsw_slave       *slave;
1007         void                    *regs = (void *)data->cpsw_base;
1008         struct eth_device       *dev;
1009         int i;
1010         int idx = 0;
1011
1012         debug("%s@%d\n", __func__, __LINE__);
1013
1014         dev = calloc(sizeof(*dev), 1);
1015         if (!dev)
1016                 return -ENOMEM;
1017
1018         priv = calloc(sizeof(*priv), 1);
1019         if (!priv) {
1020                 free(dev);
1021                 return -ENOMEM;
1022         }
1023
1024         priv->data = data;
1025         priv->dev = dev;
1026
1027         priv->slaves = calloc(sizeof(struct cpsw_slave), data->slaves);
1028         if (!priv->slaves) {
1029                 free(dev);
1030                 free(priv);
1031                 return -ENOMEM;
1032         }
1033
1034         for (i = 0; i < NUM_DESCS; i++) {
1035                 priv->descs[i].dma_desc = memalign(CONFIG_SYS_CACHELINE_SIZE,
1036                                 sizeof(struct cpsw_desc) * NUM_DESCS);
1037                 if (!priv->descs[i].dma_desc) {
1038                         while (--i >= 0) {
1039                                 free(priv->descs[i].dma_desc);
1040                         }
1041                         free(priv->slaves);
1042                         free(priv);
1043                         free(dev);
1044                         return -ENOMEM;
1045                 }
1046                 debug("DMA desc[%d] allocated @ %p desc_size %u\n",
1047                         i, priv->descs[i].dma_desc,
1048                         sizeof(*priv->descs[i].dma_desc));
1049         }
1050
1051         priv->host_port         = data->host_port_num;
1052         priv->regs              = regs;
1053         priv->host_port_regs    = regs + data->host_port_reg_ofs;
1054         priv->dma_regs          = regs + data->cpdma_reg_ofs;
1055         priv->ale_regs          = regs + data->ale_reg_ofs;
1056
1057         for_each_slave(slave, priv) {
1058                 cpsw_slave_setup(slave, idx, priv);
1059                 idx = idx + 1;
1060         }
1061
1062         strcpy(dev->name, "cpsw");
1063         dev->iobase     = 0;
1064         dev->init       = cpsw_init;
1065         dev->halt       = cpsw_halt;
1066         dev->send       = cpsw_send;
1067         dev->recv       = cpsw_recv;
1068         dev->priv       = priv;
1069
1070         eth_register(dev);
1071
1072         cpsw_mdio_init(dev->name, data->mdio_base, data->mdio_div);
1073         priv->bus = miiphy_get_dev_by_name(dev->name);
1074         for_each_slave(slave, priv) {
1075                 ret = cpsw_phy_init(dev, slave);
1076                 if (ret < 0)
1077                         break;
1078         }
1079         return ret;
1080 }