drivers/net/chelsio/mv88e1xxx.c

   1 /* $Date: 2005/10/24 23:18:13 $ $RCSfile: mv88e1xxx.c,v $ $Revision: 1.49 $ */
   2 #include "common.h"
   3 #include "mv88e1xxx.h"
   4 #include "cphy.h"
   5 #include "elmer0.h"
   6
   7 /* MV88E1XXX MDI crossover register values */
   8 #define CROSSOVER_MDI   0
   9 #define CROSSOVER_MDIX  1
  10 #define CROSSOVER_AUTO  3
  11
  12 #define INTR_ENABLE_MASK 0x6CA0
  13
  14 /*
  15  * Set the bits given by 'bitval' in PHY register 'reg'.
  16  */
  17 static void mdio_set_bit(struct cphy *cphy, int reg, u32 bitval)
  18 {
  19         u32 val;
  20
  21         (void) simple_mdio_read(cphy, reg, &val);
  22         (void) simple_mdio_write(cphy, reg, val | bitval);
  23 }
  24
  25 /*
  26  * Clear the bits given by 'bitval' in PHY register 'reg'.
  27  */
  28 static void mdio_clear_bit(struct cphy *cphy, int reg, u32 bitval)
  29 {
  30         u32 val;
  31
  32         (void) simple_mdio_read(cphy, reg, &val);
  33         (void) simple_mdio_write(cphy, reg, val & ~bitval);
  34 }
  35
  36 /*
  37  * NAME:   phy_reset
  38  *
  39  * DESC:   Reset the given PHY's port. NOTE: This is not a global
  40  *         chip reset.
  41  *
  42  * PARAMS: cphy     - Pointer to PHY instance data.
  43  *
  44  * RETURN:  0 - Successfull reset.
  45  *         -1 - Timeout.
  46  */
  47 static int mv88e1xxx_reset(struct cphy *cphy, int wait)
  48 {
  49         u32 ctl;
  50         int time_out = 1000;
  51
  52         mdio_set_bit(cphy, MII_BMCR, BMCR_RESET);
  53
  54         do {
  55                 (void) simple_mdio_read(cphy, MII_BMCR, &ctl);
  56                 ctl &= BMCR_RESET;
  57                 if (ctl)
  58                         udelay(1);
  59         } while (ctl && --time_out);
  60
  61         return ctl ? -1 : 0;
  62 }
  63
  64 static int mv88e1xxx_interrupt_enable(struct cphy *cphy)
  65 {
  66         /* Enable PHY interrupts. */
  67         (void) simple_mdio_write(cphy, MV88E1XXX_INTERRUPT_ENABLE_REGISTER,
  68                    INTR_ENABLE_MASK);
  69
  70         /* Enable Marvell interrupts through Elmer0. */
  71         if (t1_is_asic(cphy->adapter)) {
  72                 u32 elmer;
  73
  74                 t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
  75                 elmer |= ELMER0_GP_BIT1;
  76                 if (is_T2(cphy->adapter)) {
  77                     elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
  78                 }
  79                 t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
  80         }
  81         return 0;
  82 }
  83
  84 static int mv88e1xxx_interrupt_disable(struct cphy *cphy)
  85 {
  86         /* Disable all phy interrupts. */
  87         (void) simple_mdio_write(cphy, MV88E1XXX_INTERRUPT_ENABLE_REGISTER, 0);
  88
  89         /* Disable Marvell interrupts through Elmer0. */
  90         if (t1_is_asic(cphy->adapter)) {
  91                 u32 elmer;
  92
  93                 t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
  94                 elmer &= ~ELMER0_GP_BIT1;
  95                 if (is_T2(cphy->adapter)) {
  96                     elmer &= ~(ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4);
  97                 }
  98                 t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
  99         }
 100         return 0;
 101 }
 102
 103 static int mv88e1xxx_interrupt_clear(struct cphy *cphy)
 104 {
 105         u32 elmer;
 106
 107         /* Clear PHY interrupts by reading the register. */
 108         (void) simple_mdio_read(cphy,
 109                         MV88E1XXX_INTERRUPT_STATUS_REGISTER, &elmer);
 110
 111         /* Clear Marvell interrupts through Elmer0. */
 112         if (t1_is_asic(cphy->adapter)) {
 113                 t1_tpi_read(cphy->adapter, A_ELMER0_INT_CAUSE, &elmer);
 114                 elmer |= ELMER0_GP_BIT1;
 115                 if (is_T2(cphy->adapter)) {
 116                     elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
 117                 }
 118                 t1_tpi_write(cphy->adapter, A_ELMER0_INT_CAUSE, elmer);
 119         }
 120         return 0;
 121 }
 122
 123 /*
 124  * Set the PHY speed and duplex.  This also disables auto-negotiation, except
 125  * for 1Gb/s, where auto-negotiation is mandatory.
 126  */
 127 static int mv88e1xxx_set_speed_duplex(struct cphy *phy, int speed, int duplex)
 128 {
 129         u32 ctl;
 130
 131         (void) simple_mdio_read(phy, MII_BMCR, &ctl);
 132         if (speed >= 0) {
 133                 ctl &= ~(BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
 134                 if (speed == SPEED_100)
 135                         ctl |= BMCR_SPEED100;
 136                 else if (speed == SPEED_1000)
 137                         ctl |= BMCR_SPEED1000;
 138         }
 139         if (duplex >= 0) {
 140                 ctl &= ~(BMCR_FULLDPLX | BMCR_ANENABLE);
 141                 if (duplex == DUPLEX_FULL)
 142                         ctl |= BMCR_FULLDPLX;
 143         }
 144         if (ctl & BMCR_SPEED1000)  /* auto-negotiation required for 1Gb/s */
 145                 ctl |= BMCR_ANENABLE;
 146         (void) simple_mdio_write(phy, MII_BMCR, ctl);
 147         return 0;
 148 }
 149
 150 static int mv88e1xxx_crossover_set(struct cphy *cphy, int crossover)
 151 {
 152         u32 data32;
 153
 154         (void) simple_mdio_read(cphy,
 155                         MV88E1XXX_SPECIFIC_CNTRL_REGISTER, &data32);
 156         data32 &= ~V_PSCR_MDI_XOVER_MODE(M_PSCR_MDI_XOVER_MODE);
 157         data32 |= V_PSCR_MDI_XOVER_MODE(crossover);
 158         (void) simple_mdio_write(cphy,
 159                         MV88E1XXX_SPECIFIC_CNTRL_REGISTER, data32);
 160         return 0;
 161 }
 162
 163 static int mv88e1xxx_autoneg_enable(struct cphy *cphy)
 164 {
 165         u32 ctl;
 166
 167         (void) mv88e1xxx_crossover_set(cphy, CROSSOVER_AUTO);
 168
 169         (void) simple_mdio_read(cphy, MII_BMCR, &ctl);
 170         /* restart autoneg for change to take effect */
 171         ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
 172         (void) simple_mdio_write(cphy, MII_BMCR, ctl);
 173         return 0;
 174 }
 175
 176 static int mv88e1xxx_autoneg_disable(struct cphy *cphy)
 177 {
 178         u32 ctl;
 179
 180         /*
 181          * Crossover *must* be set to manual in order to disable auto-neg.
 182          * The Alaska FAQs document highlights this point.
 183          */
 184         (void) mv88e1xxx_crossover_set(cphy, CROSSOVER_MDI);
 185
 186         /*
 187          * Must include autoneg reset when disabling auto-neg. This
 188          * is described in the Alaska FAQ document.
 189          */
 190         (void) simple_mdio_read(cphy, MII_BMCR, &ctl);
 191         ctl &= ~BMCR_ANENABLE;
 192         (void) simple_mdio_write(cphy, MII_BMCR, ctl | BMCR_ANRESTART);
 193         return 0;
 194 }
 195
 196 static int mv88e1xxx_autoneg_restart(struct cphy *cphy)
 197 {
 198         mdio_set_bit(cphy, MII_BMCR, BMCR_ANRESTART);
 199         return 0;
 200 }
 201
 202 static int mv88e1xxx_advertise(struct cphy *phy, unsigned int advertise_map)
 203 {
 204         u32 val = 0;
 205
 206         if (advertise_map &
 207             (ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full)) {
 208                 (void) simple_mdio_read(phy, MII_GBCR, &val);
 209                 val &= ~(GBCR_ADV_1000HALF | GBCR_ADV_1000FULL);
 210                 if (advertise_map & ADVERTISED_1000baseT_Half)
 211                         val |= GBCR_ADV_1000HALF;
 212                 if (advertise_map & ADVERTISED_1000baseT_Full)
 213                         val |= GBCR_ADV_1000FULL;
 214         }
 215         (void) simple_mdio_write(phy, MII_GBCR, val);
 216
 217         val = 1;
 218         if (advertise_map & ADVERTISED_10baseT_Half)
 219                 val |= ADVERTISE_10HALF;
 220         if (advertise_map & ADVERTISED_10baseT_Full)
 221                 val |= ADVERTISE_10FULL;
 222         if (advertise_map & ADVERTISED_100baseT_Half)
 223                 val |= ADVERTISE_100HALF;
 224         if (advertise_map & ADVERTISED_100baseT_Full)
 225                 val |= ADVERTISE_100FULL;
 226         if (advertise_map & ADVERTISED_PAUSE)
 227                 val |= ADVERTISE_PAUSE;
 228         if (advertise_map & ADVERTISED_ASYM_PAUSE)
 229                 val |= ADVERTISE_PAUSE_ASYM;
 230         (void) simple_mdio_write(phy, MII_ADVERTISE, val);
 231         return 0;
 232 }
 233
 234 static int mv88e1xxx_set_loopback(struct cphy *cphy, int on)
 235 {
 236         if (on)
 237                 mdio_set_bit(cphy, MII_BMCR, BMCR_LOOPBACK);
 238         else
 239                 mdio_clear_bit(cphy, MII_BMCR, BMCR_LOOPBACK);
 240         return 0;
 241 }
 242
 243 static int mv88e1xxx_get_link_status(struct cphy *cphy, int *link_ok,
 244                                      int *speed, int *duplex, int *fc)
 245 {
 246         u32 status;
 247         int sp = -1, dplx = -1, pause = 0;
 248
 249         (void) simple_mdio_read(cphy,
 250                         MV88E1XXX_SPECIFIC_STATUS_REGISTER, &status);
 251         if ((status & V_PSSR_STATUS_RESOLVED) != 0) {
 252                 if (status & V_PSSR_RX_PAUSE)
 253                         pause |= PAUSE_RX;
 254                 if (status & V_PSSR_TX_PAUSE)
 255                         pause |= PAUSE_TX;
 256                 dplx = (status & V_PSSR_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
 257                 sp = G_PSSR_SPEED(status);
 258                 if (sp == 0)
 259                         sp = SPEED_10;
 260                 else if (sp == 1)
 261                         sp = SPEED_100;
 262                 else
 263                         sp = SPEED_1000;
 264         }
 265         if (link_ok)
 266                 *link_ok = (status & V_PSSR_LINK) != 0;
 267         if (speed)
 268                 *speed = sp;
 269         if (duplex)
 270                 *duplex = dplx;
 271         if (fc)
 272                 *fc = pause;
 273         return 0;
 274 }
 275
 276 static int mv88e1xxx_downshift_set(struct cphy *cphy, int downshift_enable)
 277 {
 278         u32 val;
 279
 280         (void) simple_mdio_read(cphy,
 281                 MV88E1XXX_EXT_PHY_SPECIFIC_CNTRL_REGISTER, &val);
 282
 283         /*
 284          * Set the downshift counter to 2 so we try to establish Gb link
 285          * twice before downshifting.
 286          */
 287         val &= ~(V_DOWNSHIFT_ENABLE | V_DOWNSHIFT_CNT(M_DOWNSHIFT_CNT));
 288
 289         if (downshift_enable)
 290                 val |= V_DOWNSHIFT_ENABLE | V_DOWNSHIFT_CNT(2);
 291         (void) simple_mdio_write(cphy,
 292                         MV88E1XXX_EXT_PHY_SPECIFIC_CNTRL_REGISTER, val);
 293         return 0;
 294 }
 295
 296 static int mv88e1xxx_interrupt_handler(struct cphy *cphy)
 297 {
 298         int cphy_cause = 0;
 299         u32 status;
 300
 301         /*
 302          * Loop until cause reads zero. Need to handle bouncing interrupts.
 303          */
 304         while (1) {
 305                 u32 cause;
 306
 307                 (void) simple_mdio_read(cphy,
 308                                 MV88E1XXX_INTERRUPT_STATUS_REGISTER,
 309                                 &cause);
 310                 cause &= INTR_ENABLE_MASK;
 311                 if (!cause) break;
 312
 313                 if (cause & MV88E1XXX_INTR_LINK_CHNG) {
 314                         (void) simple_mdio_read(cphy,
 315                                 MV88E1XXX_SPECIFIC_STATUS_REGISTER, &status);
 316
 317                         if (status & MV88E1XXX_INTR_LINK_CHNG) {
 318                                 cphy->state |= PHY_LINK_UP;
 319                         } else {
 320                                 cphy->state &= ~PHY_LINK_UP;
 321                                 if (cphy->state & PHY_AUTONEG_EN)
 322                                         cphy->state &= ~PHY_AUTONEG_RDY;
 323                                 cphy_cause |= cphy_cause_link_change;
 324                         }
 325                 }
 326
 327                 if (cause & MV88E1XXX_INTR_AUTONEG_DONE)
 328                         cphy->state |= PHY_AUTONEG_RDY;
 329
 330                 if ((cphy->state & (PHY_LINK_UP | PHY_AUTONEG_RDY)) ==
 331                         (PHY_LINK_UP | PHY_AUTONEG_RDY))
 332                                 cphy_cause |= cphy_cause_link_change;
 333         }
 334         return cphy_cause;
 335 }
 336
 337 static void mv88e1xxx_destroy(struct cphy *cphy)
 338 {
 339         kfree(cphy);
 340 }
 341
 342 static struct cphy_ops mv88e1xxx_ops = {
 343         .destroy              = mv88e1xxx_destroy,
 344         .reset                = mv88e1xxx_reset,
 345         .interrupt_enable     = mv88e1xxx_interrupt_enable,
 346         .interrupt_disable    = mv88e1xxx_interrupt_disable,
 347         .interrupt_clear      = mv88e1xxx_interrupt_clear,
 348         .interrupt_handler    = mv88e1xxx_interrupt_handler,
 349         .autoneg_enable       = mv88e1xxx_autoneg_enable,
 350         .autoneg_disable      = mv88e1xxx_autoneg_disable,
 351         .autoneg_restart      = mv88e1xxx_autoneg_restart,
 352         .advertise            = mv88e1xxx_advertise,
 353         .set_loopback         = mv88e1xxx_set_loopback,
 354         .set_speed_duplex     = mv88e1xxx_set_speed_duplex,
 355         .get_link_status      = mv88e1xxx_get_link_status,
 356 };
 357
 358 static struct cphy *mv88e1xxx_phy_create(adapter_t *adapter, int phy_addr,
 359                                          struct mdio_ops *mdio_ops)
 360 {
 361         struct cphy *cphy = kzalloc(sizeof(*cphy), GFP_KERNEL);
 362
 363         if (!cphy) return NULL;
 364
 365         cphy_init(cphy, adapter, phy_addr, &mv88e1xxx_ops, mdio_ops);
 366
 367         /* Configure particular PHY's to run in a different mode. */
 368         if ((board_info(adapter)->caps & SUPPORTED_TP) &&
 369             board_info(adapter)->chip_phy == CHBT_PHY_88E1111) {
 370                 /*
 371                  * Configure the PHY transmitter as class A to reduce EMI.
 372                  */
 373                 (void) simple_mdio_write(cphy,
 374                                 MV88E1XXX_EXTENDED_ADDR_REGISTER, 0xB);
 375                 (void) simple_mdio_write(cphy,
 376                                 MV88E1XXX_EXTENDED_REGISTER, 0x8004);
 377         }
 378         (void) mv88e1xxx_downshift_set(cphy, 1);   /* Enable downshift */
 379
 380         /* LED */
 381         if (is_T2(adapter)) {
 382                 (void) simple_mdio_write(cphy,
 383                                 MV88E1XXX_LED_CONTROL_REGISTER, 0x1);
 384         }
 385
 386         return cphy;
 387 }
 388
 389 static int mv88e1xxx_phy_reset(adapter_t* adapter)
 390 {
 391         return 0;
 392 }
 393
 394 struct gphy t1_mv88e1xxx_ops = {
 395         mv88e1xxx_phy_create,
 396         mv88e1xxx_phy_reset
 397 };