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