drivers/net/ethernet/broadcom/bgmac-bcma.c

   1 /*
   2  * Driver for (BCM4706)? GBit MAC core on BCMA bus.
   3  *
   4  * Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
   5  *
   6  * Licensed under the GNU/GPL. See COPYING for details.
   7  */
   8
   9 #define pr_fmt(fmt)             KBUILD_MODNAME ": " fmt
  10
  11 #include <linux/bcma/bcma.h>
  12 #include <linux/brcmphy.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/of_mdio.h>
  15 #include <linux/of_net.h>
  16 #include "bgmac.h"
  17
  18 static inline bool bgmac_is_bcm4707_family(struct bcma_device *core)
  19 {
  20         switch (core->bus->chipinfo.id) {
  21         case BCMA_CHIP_ID_BCM4707:
  22         case BCMA_CHIP_ID_BCM47094:
  23         case BCMA_CHIP_ID_BCM53018:
  24                 return true;
  25         default:
  26                 return false;
  27         }
  28 }
  29
  30 /**************************************************
  31  * BCMA bus ops
  32  **************************************************/
  33
  34 static u32 bcma_bgmac_read(struct bgmac *bgmac, u16 offset)
  35 {
  36         return bcma_read32(bgmac->bcma.core, offset);
  37 }
  38
  39 static void bcma_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
  40 {
  41         bcma_write32(bgmac->bcma.core, offset, value);
  42 }
  43
  44 static u32 bcma_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
  45 {
  46         return bcma_aread32(bgmac->bcma.core, offset);
  47 }
  48
  49 static void bcma_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
  50 {
  51         return bcma_awrite32(bgmac->bcma.core, offset, value);
  52 }
  53
  54 static bool bcma_bgmac_clk_enabled(struct bgmac *bgmac)
  55 {
  56         return bcma_core_is_enabled(bgmac->bcma.core);
  57 }
  58
  59 static void bcma_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
  60 {
  61         bcma_core_enable(bgmac->bcma.core, flags);
  62 }
  63
  64 static void bcma_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
  65                                        u32 mask, u32 set)
  66 {
  67         struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
  68
  69         bcma_chipco_chipctl_maskset(cc, offset, mask, set);
  70 }
  71
  72 static u32 bcma_bgmac_get_bus_clock(struct bgmac *bgmac)
  73 {
  74         struct bcma_drv_cc *cc = &bgmac->bcma.core->bus->drv_cc;
  75
  76         return bcma_pmu_get_bus_clock(cc);
  77 }
  78
  79 static void bcma_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, u32 mask,
  80                                      u32 set)
  81 {
  82         bcma_maskset32(bgmac->bcma.cmn, offset, mask, set);
  83 }
  84
  85 static int bcma_phy_connect(struct bgmac *bgmac)
  86 {
  87         struct phy_device *phy_dev;
  88         char bus_id[MII_BUS_ID_SIZE + 3];
  89
  90         /* DT info should be the most accurate */
  91         phy_dev = of_phy_get_and_connect(bgmac->net_dev, bgmac->dev->of_node,
  92                                          bgmac_adjust_link);
  93         if (phy_dev)
  94                 return 0;
  95
  96         /* Connect to the PHY */
  97         if (bgmac->mii_bus && bgmac->phyaddr != BGMAC_PHY_NOREGS) {
  98                 snprintf(bus_id, sizeof(bus_id), PHY_ID_FMT, bgmac->mii_bus->id,
  99                          bgmac->phyaddr);
 100                 phy_dev = phy_connect(bgmac->net_dev, bus_id, bgmac_adjust_link,
 101                                       PHY_INTERFACE_MODE_MII);
 102                 if (IS_ERR(phy_dev)) {
 103                         dev_err(bgmac->dev, "PHY connection failed\n");
 104                         return PTR_ERR(phy_dev);
 105                 }
 106
 107                 return 0;
 108         }
 109
 110         /* Assume a fixed link to the switch port */
 111         return bgmac_phy_connect_direct(bgmac);
 112 }
 113
 114 static const struct bcma_device_id bgmac_bcma_tbl[] = {
 115         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT,
 116                   BCMA_ANY_REV, BCMA_ANY_CLASS),
 117         BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV,
 118                   BCMA_ANY_CLASS),
 119         {},
 120 };
 121 MODULE_DEVICE_TABLE(bcma, bgmac_bcma_tbl);
 122
 123 /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipattach */
 124 static int bgmac_probe(struct bcma_device *core)
 125 {
 126         struct bcma_chipinfo *ci = &core->bus->chipinfo;
 127         struct ssb_sprom *sprom = &core->bus->sprom;
 128         struct mii_bus *mii_bus;
 129         struct bgmac *bgmac;
 130         const u8 *mac;
 131         int err;
 132
 133         bgmac = bgmac_alloc(&core->dev);
 134         if (!bgmac)
 135                 return -ENOMEM;
 136
 137         bgmac->bcma.core = core;
 138         bgmac->dma_dev = core->dma_dev;
 139         bgmac->irq = core->irq;
 140
 141         bcma_set_drvdata(core, bgmac);
 142
 143         err = of_get_ethdev_address(bgmac->dev->of_node, bgmac->net_dev);
 144         if (err == -EPROBE_DEFER)
 145                 return err;
 146
 147         /* If no MAC address assigned via device tree, check SPROM */
 148         if (err) {
 149                 switch (core->core_unit) {
 150                 case 0:
 151                         mac = sprom->et0mac;
 152                         break;
 153                 case 1:
 154                         mac = sprom->et1mac;
 155                         break;
 156                 case 2:
 157                         mac = sprom->et2mac;
 158                         break;
 159                 default:
 160                         dev_err(bgmac->dev, "Unsupported core_unit %d\n",
 161                                 core->core_unit);
 162                         err = -ENOTSUPP;
 163                         goto err;
 164                 }
 165                 eth_hw_addr_set(bgmac->net_dev, mac);
 166         }
 167
 168         /* On BCM4706 we need common core to access PHY */
 169         if (core->id.id == BCMA_CORE_4706_MAC_GBIT &&
 170             !core->bus->drv_gmac_cmn.core) {
 171                 dev_err(bgmac->dev, "GMAC CMN core not found (required for BCM4706)\n");
 172                 err = -ENODEV;
 173                 goto err;
 174         }
 175         bgmac->bcma.cmn = core->bus->drv_gmac_cmn.core;
 176
 177         switch (core->core_unit) {
 178         case 0:
 179                 bgmac->phyaddr = sprom->et0phyaddr;
 180                 break;
 181         case 1:
 182                 bgmac->phyaddr = sprom->et1phyaddr;
 183                 break;
 184         case 2:
 185                 bgmac->phyaddr = sprom->et2phyaddr;
 186                 break;
 187         }
 188         bgmac->phyaddr &= BGMAC_PHY_MASK;
 189         if (bgmac->phyaddr == BGMAC_PHY_MASK) {
 190                 dev_err(bgmac->dev, "No PHY found\n");
 191                 err = -ENODEV;
 192                 goto err;
 193         }
 194         dev_info(bgmac->dev, "Found PHY addr: %d%s\n", bgmac->phyaddr,
 195                  bgmac->phyaddr == BGMAC_PHY_NOREGS ? " (NOREGS)" : "");
 196
 197         if (!bgmac_is_bcm4707_family(core) &&
 198             !(ci->id == BCMA_CHIP_ID_BCM53573 && core->core_unit == 1)) {
 199                 struct phy_device *phydev;
 200
 201                 mii_bus = bcma_mdio_mii_register(bgmac);
 202                 if (IS_ERR(mii_bus)) {
 203                         err = PTR_ERR(mii_bus);
 204                         goto err;
 205                 }
 206                 bgmac->mii_bus = mii_bus;
 207
 208                 phydev = mdiobus_get_phy(bgmac->mii_bus, bgmac->phyaddr);
 209                 if (ci->id == BCMA_CHIP_ID_BCM53573 && phydev &&
 210                     (phydev->drv->phy_id & phydev->drv->phy_id_mask) == PHY_ID_BCM54210E)
 211                         phydev->dev_flags |= PHY_BRCM_EN_MASTER_MODE;
 212         }
 213
 214         if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
 215                 dev_err(bgmac->dev, "PCI setup not implemented\n");
 216                 err = -ENOTSUPP;
 217                 goto err1;
 218         }
 219
 220         bgmac->has_robosw = !!(sprom->boardflags_lo & BGMAC_BFL_ENETROBO);
 221         if (bgmac->has_robosw)
 222                 dev_warn(bgmac->dev, "Support for Roboswitch not implemented\n");
 223
 224         if (sprom->boardflags_lo & BGMAC_BFL_ENETADM)
 225                 dev_warn(bgmac->dev, "Support for ADMtek ethernet switch not implemented\n");
 226
 227         /* Feature Flags */
 228         switch (ci->id) {
 229         /* BCM 471X/535X family */
 230         case BCMA_CHIP_ID_BCM4716:
 231                 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 232                 fallthrough;
 233         case BCMA_CHIP_ID_BCM47162:
 234                 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL2;
 235                 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
 236                 break;
 237         case BCMA_CHIP_ID_BCM5357:
 238         case BCMA_CHIP_ID_BCM53572:
 239                 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
 240                 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 241                 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
 242                 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
 243                 if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM47186) ||
 244                     (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == BCMA_PKG_ID_BCM47188)) {
 245                         bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
 246                         bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
 247                 }
 248                 if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == BCMA_PKG_ID_BCM5358)
 249                         bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_EPHYRMII;
 250                 break;
 251         case BCMA_CHIP_ID_BCM53573:
 252                 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 253                 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
 254                 if (ci->pkg == BCMA_PKG_ID_BCM47189)
 255                         bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
 256                 if (core->core_unit == 0) {
 257                         bgmac->feature_flags |= BGMAC_FEAT_CC4_IF_SW_TYPE;
 258                         if (ci->pkg == BCMA_PKG_ID_BCM47189)
 259                                 bgmac->feature_flags |=
 260                                         BGMAC_FEAT_CC4_IF_SW_TYPE_RGMII;
 261                 } else if (core->core_unit == 1) {
 262                         bgmac->feature_flags |= BGMAC_FEAT_IRQ_ID_OOB_6;
 263                         bgmac->feature_flags |= BGMAC_FEAT_CC7_IF_TYPE_RGMII;
 264                 }
 265                 break;
 266         case BCMA_CHIP_ID_BCM4749:
 267                 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
 268                 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 269                 bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL1;
 270                 bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_PHY;
 271                 if (ci->pkg == 10) {
 272                         bgmac->feature_flags |= BGMAC_FEAT_SW_TYPE_RGMII;
 273                         bgmac->feature_flags |= BGMAC_FEAT_IOST_ATTACHED;
 274                 }
 275                 break;
 276         /* bcm4707_family */
 277         case BCMA_CHIP_ID_BCM4707:
 278         case BCMA_CHIP_ID_BCM47094:
 279         case BCMA_CHIP_ID_BCM53018:
 280                 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 281                 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
 282                 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
 283                 break;
 284         default:
 285                 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
 286                 bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
 287         }
 288
 289         if (!bgmac_is_bcm4707_family(core) && core->id.rev > 2)
 290                 bgmac->feature_flags |= BGMAC_FEAT_MISC_PLL_REQ;
 291
 292         if (core->id.id == BCMA_CORE_4706_MAC_GBIT) {
 293                 bgmac->feature_flags |= BGMAC_FEAT_CMN_PHY_CTL;
 294                 bgmac->feature_flags |= BGMAC_FEAT_NO_CLR_MIB;
 295         }
 296
 297         if (core->id.rev >= 4) {
 298                 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
 299                 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
 300                 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
 301         }
 302
 303         bgmac->read = bcma_bgmac_read;
 304         bgmac->write = bcma_bgmac_write;
 305         bgmac->idm_read = bcma_bgmac_idm_read;
 306         bgmac->idm_write = bcma_bgmac_idm_write;
 307         bgmac->clk_enabled = bcma_bgmac_clk_enabled;
 308         bgmac->clk_enable = bcma_bgmac_clk_enable;
 309         bgmac->cco_ctl_maskset = bcma_bgmac_cco_ctl_maskset;
 310         bgmac->get_bus_clock = bcma_bgmac_get_bus_clock;
 311         bgmac->cmn_maskset32 = bcma_bgmac_cmn_maskset32;
 312         bgmac->phy_connect = bcma_phy_connect;
 313
 314         err = bgmac_enet_probe(bgmac);
 315         if (err)
 316                 goto err1;
 317
 318         return 0;
 319
 320 err1:
 321         bcma_mdio_mii_unregister(bgmac->mii_bus);
 322 err:
 323         bcma_set_drvdata(core, NULL);
 324
 325         return err;
 326 }
 327
 328 static void bgmac_remove(struct bcma_device *core)
 329 {
 330         struct bgmac *bgmac = bcma_get_drvdata(core);
 331
 332         bcma_mdio_mii_unregister(bgmac->mii_bus);
 333         bgmac_enet_remove(bgmac);
 334         bcma_set_drvdata(core, NULL);
 335 }
 336
 337 static struct bcma_driver bgmac_bcma_driver = {
 338         .name           = KBUILD_MODNAME,
 339         .id_table       = bgmac_bcma_tbl,
 340         .probe          = bgmac_probe,
 341         .remove         = bgmac_remove,
 342 };
 343
 344 static int __init bgmac_init(void)
 345 {
 346         int err;
 347
 348         err = bcma_driver_register(&bgmac_bcma_driver);
 349         if (err)
 350                 return err;
 351         pr_info("Broadcom 47xx GBit MAC driver loaded\n");
 352
 353         return 0;
 354 }
 355
 356 static void __exit bgmac_exit(void)
 357 {
 358         bcma_driver_unregister(&bgmac_bcma_driver);
 359 }
 360
 361 module_init(bgmac_init)
 362 module_exit(bgmac_exit)
 363
 364 MODULE_AUTHOR("Rafał Miłecki");
 365 MODULE_DESCRIPTION("Broadcom iProc GBit BCMA interface driver");
 366 MODULE_LICENSE("GPL");