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