1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Broadcom BCM7xxx internal transceivers support. 4 * 5 * Copyright (C) 2014-2017 Broadcom 6 */ 7 8 #include <linux/module.h> 9 #include <linux/phy.h> 10 #include <linux/delay.h> 11 #include "bcm-phy-lib.h" 12 #include <linux/bitops.h> 13 #include <linux/brcmphy.h> 14 #include <linux/clk.h> 15 #include <linux/mdio.h> 16 17 /* Broadcom BCM7xxx internal PHY registers */ 18 19 /* EPHY only register definitions */ 20 #define MII_BCM7XXX_100TX_AUX_CTL 0x10 21 #define MII_BCM7XXX_100TX_FALSE_CAR 0x13 22 #define MII_BCM7XXX_100TX_DISC 0x14 23 #define MII_BCM7XXX_AUX_MODE 0x1d 24 #define MII_BCM7XXX_64CLK_MDIO BIT(12) 25 #define MII_BCM7XXX_TEST 0x1f 26 #define MII_BCM7XXX_SHD_MODE_2 BIT(2) 27 #define MII_BCM7XXX_SHD_2_ADDR_CTRL 0xe 28 #define MII_BCM7XXX_SHD_2_CTRL_STAT 0xf 29 #define MII_BCM7XXX_SHD_2_BIAS_TRIM 0x1a 30 #define MII_BCM7XXX_SHD_3_PCS_CTRL 0x0 31 #define MII_BCM7XXX_SHD_3_PCS_STATUS 0x1 32 #define MII_BCM7XXX_SHD_3_EEE_CAP 0x2 33 #define MII_BCM7XXX_SHD_3_AN_EEE_ADV 0x3 34 #define MII_BCM7XXX_SHD_3_EEE_LP 0x4 35 #define MII_BCM7XXX_SHD_3_EEE_WK_ERR 0x5 36 #define MII_BCM7XXX_SHD_3_PCS_CTRL_2 0x6 37 #define MII_BCM7XXX_PCS_CTRL_2_DEF 0x4400 38 #define MII_BCM7XXX_SHD_3_AN_STAT 0xb 39 #define MII_BCM7XXX_AN_NULL_MSG_EN BIT(0) 40 #define MII_BCM7XXX_AN_EEE_EN BIT(1) 41 #define MII_BCM7XXX_SHD_3_EEE_THRESH 0xe 42 #define MII_BCM7XXX_EEE_THRESH_DEF 0x50 43 #define MII_BCM7XXX_SHD_3_TL4 0x23 44 #define MII_BCM7XXX_TL4_RST_MSK (BIT(2) | BIT(1)) 45 46 struct bcm7xxx_phy_priv { 47 u64 *stats; 48 }; 49 50 static int bcm7xxx_28nm_d0_afe_config_init(struct phy_device *phydev) 51 { 52 /* AFE_RXCONFIG_0 */ 53 bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb15); 54 55 /* AFE_RXCONFIG_1 */ 56 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f); 57 58 /* AFE_RXCONFIG_2, set rCal offset for HT=0 code and LT=-2 code */ 59 bcm_phy_write_misc(phydev, AFE_RXCONFIG_2, 0x2003); 60 61 /* AFE_RX_LP_COUNTER, set RX bandwidth to maximum */ 62 bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0); 63 64 /* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */ 65 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431); 66 67 /* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */ 68 bcm_phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da); 69 70 /* AFE_VDAC_OTHERS_0, set 1000BT Cidac=010 for all ports */ 71 bcm_phy_write_misc(phydev, AFE_VDAC_OTHERS_0, 0xa020); 72 73 /* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal 74 * offset for HT=0 code 75 */ 76 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3); 77 78 /* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */ 79 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x0010); 80 81 /* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */ 82 bcm_phy_write_misc(phydev, DSP_TAP10, 0x011b); 83 84 /* Reset R_CAL/RC_CAL engine */ 85 bcm_phy_r_rc_cal_reset(phydev); 86 87 return 0; 88 } 89 90 static int bcm7xxx_28nm_e0_plus_afe_config_init(struct phy_device *phydev) 91 { 92 /* AFE_RXCONFIG_1, provide more margin for INL/DNL measurement */ 93 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f); 94 95 /* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */ 96 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431); 97 98 /* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */ 99 bcm_phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da); 100 101 /* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal 102 * offset for HT=0 code 103 */ 104 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3); 105 106 /* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */ 107 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x0010); 108 109 /* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */ 110 bcm_phy_write_misc(phydev, DSP_TAP10, 0x011b); 111 112 /* Reset R_CAL/RC_CAL engine */ 113 bcm_phy_r_rc_cal_reset(phydev); 114 115 return 0; 116 } 117 118 static int bcm7xxx_28nm_a0_patch_afe_config_init(struct phy_device *phydev) 119 { 120 /* +1 RC_CAL codes for RL centering for both LT and HT conditions */ 121 bcm_phy_write_misc(phydev, AFE_RXCONFIG_2, 0xd003); 122 123 /* Cut master bias current by 2% to compensate for RC_CAL offset */ 124 bcm_phy_write_misc(phydev, DSP_TAP10, 0x791b); 125 126 /* Improve hybrid leakage */ 127 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x10e3); 128 129 /* Change rx_on_tune 8 to 0xf */ 130 bcm_phy_write_misc(phydev, 0x21, 0x2, 0x87f6); 131 132 /* Change 100Tx EEE bandwidth */ 133 bcm_phy_write_misc(phydev, 0x22, 0x2, 0x017d); 134 135 /* Enable ffe zero detection for Vitesse interoperability */ 136 bcm_phy_write_misc(phydev, 0x26, 0x2, 0x0015); 137 138 bcm_phy_r_rc_cal_reset(phydev); 139 140 return 0; 141 } 142 143 static int bcm7xxx_28nm_config_init(struct phy_device *phydev) 144 { 145 u8 rev = PHY_BRCM_7XXX_REV(phydev->dev_flags); 146 u8 patch = PHY_BRCM_7XXX_PATCH(phydev->dev_flags); 147 u8 count; 148 int ret = 0; 149 150 /* Newer devices have moved the revision information back into a 151 * standard location in MII_PHYS_ID[23] 152 */ 153 if (rev == 0) 154 rev = phydev->phy_id & ~phydev->drv->phy_id_mask; 155 156 pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n", 157 phydev_name(phydev), phydev->drv->name, rev, patch); 158 159 /* Dummy read to a register to workaround an issue upon reset where the 160 * internal inverter may not allow the first MDIO transaction to pass 161 * the MDIO management controller and make us return 0xffff for such 162 * reads. 163 */ 164 phy_read(phydev, MII_BMSR); 165 166 switch (rev) { 167 case 0xa0: 168 case 0xb0: 169 ret = bcm_phy_28nm_a0b0_afe_config_init(phydev); 170 break; 171 case 0xd0: 172 ret = bcm7xxx_28nm_d0_afe_config_init(phydev); 173 break; 174 case 0xe0: 175 case 0xf0: 176 /* Rev G0 introduces a roll over */ 177 case 0x10: 178 ret = bcm7xxx_28nm_e0_plus_afe_config_init(phydev); 179 break; 180 case 0x01: 181 ret = bcm7xxx_28nm_a0_patch_afe_config_init(phydev); 182 break; 183 default: 184 break; 185 } 186 187 if (ret) 188 return ret; 189 190 ret = bcm_phy_enable_jumbo(phydev); 191 if (ret) 192 return ret; 193 194 ret = bcm_phy_downshift_get(phydev, &count); 195 if (ret) 196 return ret; 197 198 /* Only enable EEE if Wirespeed/downshift is disabled */ 199 ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE); 200 if (ret) 201 return ret; 202 203 return bcm_phy_enable_apd(phydev, true); 204 } 205 206 static int bcm7xxx_28nm_resume(struct phy_device *phydev) 207 { 208 int ret; 209 210 /* Re-apply workarounds coming out suspend/resume */ 211 ret = bcm7xxx_28nm_config_init(phydev); 212 if (ret) 213 return ret; 214 215 /* 28nm Gigabit PHYs come out of reset without any half-duplex 216 * or "hub" compliant advertised mode, fix that. This does not 217 * cause any problems with the PHY library since genphy_config_aneg() 218 * gracefully handles auto-negotiated and forced modes. 219 */ 220 return genphy_config_aneg(phydev); 221 } 222 223 static int __phy_set_clr_bits(struct phy_device *dev, int location, 224 int set_mask, int clr_mask) 225 { 226 int v, ret; 227 228 v = __phy_read(dev, location); 229 if (v < 0) 230 return v; 231 232 v &= ~clr_mask; 233 v |= set_mask; 234 235 ret = __phy_write(dev, location, v); 236 if (ret < 0) 237 return ret; 238 239 return v; 240 } 241 242 static int phy_set_clr_bits(struct phy_device *dev, int location, 243 int set_mask, int clr_mask) 244 { 245 int ret; 246 247 mutex_lock(&dev->mdio.bus->mdio_lock); 248 ret = __phy_set_clr_bits(dev, location, set_mask, clr_mask); 249 mutex_unlock(&dev->mdio.bus->mdio_lock); 250 251 return ret; 252 } 253 254 static int bcm7xxx_28nm_ephy_01_afe_config_init(struct phy_device *phydev) 255 { 256 int ret; 257 258 /* set shadow mode 2 */ 259 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 260 MII_BCM7XXX_SHD_MODE_2, 0); 261 if (ret < 0) 262 return ret; 263 264 /* Set current trim values INT_trim = -1, Ext_trim =0 */ 265 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_BIAS_TRIM, 0x3BE0); 266 if (ret < 0) 267 goto reset_shadow_mode; 268 269 /* Cal reset */ 270 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, 271 MII_BCM7XXX_SHD_3_TL4); 272 if (ret < 0) 273 goto reset_shadow_mode; 274 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, 275 MII_BCM7XXX_TL4_RST_MSK, 0); 276 if (ret < 0) 277 goto reset_shadow_mode; 278 279 /* Cal reset disable */ 280 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, 281 MII_BCM7XXX_SHD_3_TL4); 282 if (ret < 0) 283 goto reset_shadow_mode; 284 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, 285 0, MII_BCM7XXX_TL4_RST_MSK); 286 if (ret < 0) 287 goto reset_shadow_mode; 288 289 reset_shadow_mode: 290 /* reset shadow mode 2 */ 291 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, 292 MII_BCM7XXX_SHD_MODE_2); 293 if (ret < 0) 294 return ret; 295 296 return 0; 297 } 298 299 /* The 28nm EPHY does not support Clause 45 (MMD) used by bcm-phy-lib */ 300 static int bcm7xxx_28nm_ephy_apd_enable(struct phy_device *phydev) 301 { 302 int ret; 303 304 /* set shadow mode 1 */ 305 ret = phy_set_clr_bits(phydev, MII_BRCM_FET_BRCMTEST, 306 MII_BRCM_FET_BT_SRE, 0); 307 if (ret < 0) 308 return ret; 309 310 /* Enable auto-power down */ 311 ret = phy_set_clr_bits(phydev, MII_BRCM_FET_SHDW_AUXSTAT2, 312 MII_BRCM_FET_SHDW_AS2_APDE, 0); 313 if (ret < 0) 314 return ret; 315 316 /* reset shadow mode 1 */ 317 ret = phy_set_clr_bits(phydev, MII_BRCM_FET_BRCMTEST, 0, 318 MII_BRCM_FET_BT_SRE); 319 if (ret < 0) 320 return ret; 321 322 return 0; 323 } 324 325 static int bcm7xxx_28nm_ephy_eee_enable(struct phy_device *phydev) 326 { 327 int ret; 328 329 /* set shadow mode 2 */ 330 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 331 MII_BCM7XXX_SHD_MODE_2, 0); 332 if (ret < 0) 333 return ret; 334 335 /* Advertise supported modes */ 336 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, 337 MII_BCM7XXX_SHD_3_AN_EEE_ADV); 338 if (ret < 0) 339 goto reset_shadow_mode; 340 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, 341 MDIO_EEE_100TX); 342 if (ret < 0) 343 goto reset_shadow_mode; 344 345 /* Restore Defaults */ 346 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, 347 MII_BCM7XXX_SHD_3_PCS_CTRL_2); 348 if (ret < 0) 349 goto reset_shadow_mode; 350 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, 351 MII_BCM7XXX_PCS_CTRL_2_DEF); 352 if (ret < 0) 353 goto reset_shadow_mode; 354 355 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, 356 MII_BCM7XXX_SHD_3_EEE_THRESH); 357 if (ret < 0) 358 goto reset_shadow_mode; 359 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, 360 MII_BCM7XXX_EEE_THRESH_DEF); 361 if (ret < 0) 362 goto reset_shadow_mode; 363 364 /* Enable EEE autonegotiation */ 365 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, 366 MII_BCM7XXX_SHD_3_AN_STAT); 367 if (ret < 0) 368 goto reset_shadow_mode; 369 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, 370 (MII_BCM7XXX_AN_NULL_MSG_EN | MII_BCM7XXX_AN_EEE_EN)); 371 if (ret < 0) 372 goto reset_shadow_mode; 373 374 reset_shadow_mode: 375 /* reset shadow mode 2 */ 376 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, 377 MII_BCM7XXX_SHD_MODE_2); 378 if (ret < 0) 379 return ret; 380 381 /* Restart autoneg */ 382 phy_write(phydev, MII_BMCR, 383 (BMCR_SPEED100 | BMCR_ANENABLE | BMCR_ANRESTART)); 384 385 return 0; 386 } 387 388 static int bcm7xxx_28nm_ephy_config_init(struct phy_device *phydev) 389 { 390 u8 rev = phydev->phy_id & ~phydev->drv->phy_id_mask; 391 int ret = 0; 392 393 pr_info_once("%s: %s PHY revision: 0x%02x\n", 394 phydev_name(phydev), phydev->drv->name, rev); 395 396 /* Dummy read to a register to workaround a possible issue upon reset 397 * where the internal inverter may not allow the first MDIO transaction 398 * to pass the MDIO management controller and make us return 0xffff for 399 * such reads. 400 */ 401 phy_read(phydev, MII_BMSR); 402 403 /* Apply AFE software work-around if necessary */ 404 if (rev == 0x01) { 405 ret = bcm7xxx_28nm_ephy_01_afe_config_init(phydev); 406 if (ret) 407 return ret; 408 } 409 410 ret = bcm7xxx_28nm_ephy_eee_enable(phydev); 411 if (ret) 412 return ret; 413 414 return bcm7xxx_28nm_ephy_apd_enable(phydev); 415 } 416 417 static int bcm7xxx_16nm_ephy_afe_config(struct phy_device *phydev) 418 { 419 int tmp, rcalcode, rcalnewcodelp, rcalnewcode11, rcalnewcode11d2; 420 421 /* Reset PHY */ 422 tmp = genphy_soft_reset(phydev); 423 if (tmp) 424 return tmp; 425 426 /* Reset AFE and PLL */ 427 bcm_phy_write_exp_sel(phydev, 0x0003, 0x0006); 428 /* Clear reset */ 429 bcm_phy_write_exp_sel(phydev, 0x0003, 0x0000); 430 431 /* Write PLL/AFE control register to select 54MHz crystal */ 432 bcm_phy_write_misc(phydev, 0x0030, 0x0001, 0x0000); 433 bcm_phy_write_misc(phydev, 0x0031, 0x0000, 0x044a); 434 435 /* Change Ka,Kp,Ki to pdiv=1 */ 436 bcm_phy_write_misc(phydev, 0x0033, 0x0002, 0x71a1); 437 /* Configuration override */ 438 bcm_phy_write_misc(phydev, 0x0033, 0x0001, 0x8000); 439 440 /* Change PLL_NDIV and PLL_NUDGE */ 441 bcm_phy_write_misc(phydev, 0x0031, 0x0001, 0x2f68); 442 bcm_phy_write_misc(phydev, 0x0031, 0x0002, 0x0000); 443 444 /* Reference frequency is 54Mhz, config_mode[15:14] = 3 (low 445 * phase) 446 */ 447 bcm_phy_write_misc(phydev, 0x0030, 0x0003, 0xc036); 448 449 /* Initialize bypass mode */ 450 bcm_phy_write_misc(phydev, 0x0032, 0x0003, 0x0000); 451 /* Bypass code, default: VCOCLK enabled */ 452 bcm_phy_write_misc(phydev, 0x0033, 0x0000, 0x0002); 453 /* LDOs at default setting */ 454 bcm_phy_write_misc(phydev, 0x0030, 0x0002, 0x01c0); 455 /* Release PLL reset */ 456 bcm_phy_write_misc(phydev, 0x0030, 0x0001, 0x0001); 457 458 /* Bandgap curvature correction to correct default */ 459 bcm_phy_write_misc(phydev, 0x0038, 0x0000, 0x0010); 460 461 /* Run RCAL */ 462 bcm_phy_write_misc(phydev, 0x0039, 0x0003, 0x0038); 463 bcm_phy_write_misc(phydev, 0x0039, 0x0003, 0x003b); 464 udelay(2); 465 bcm_phy_write_misc(phydev, 0x0039, 0x0003, 0x003f); 466 mdelay(5); 467 468 /* AFE_CAL_CONFIG_0, Vref=1000, Target=10, averaging enabled */ 469 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x1c82); 470 /* AFE_CAL_CONFIG_0, no reset and analog powerup */ 471 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9e82); 472 udelay(2); 473 /* AFE_CAL_CONFIG_0, start calibration */ 474 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9f82); 475 udelay(100); 476 /* AFE_CAL_CONFIG_0, clear start calibration, set HiBW */ 477 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9e86); 478 udelay(2); 479 /* AFE_CAL_CONFIG_0, start calibration with hi BW mode set */ 480 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9f86); 481 udelay(100); 482 483 /* Adjust 10BT amplitude additional +7% and 100BT +2% */ 484 bcm_phy_write_misc(phydev, 0x0038, 0x0001, 0xe7ea); 485 /* Adjust 1G mode amplitude and 1G testmode1 */ 486 bcm_phy_write_misc(phydev, 0x0038, 0x0002, 0xede0); 487 488 /* Read CORE_EXPA9 */ 489 tmp = bcm_phy_read_exp_sel(phydev, 0x00a9); 490 /* CORE_EXPA9[6:1] is rcalcode[5:0] */ 491 rcalcode = (tmp & 0x7e) / 2; 492 /* Correct RCAL code + 1 is -1% rprogr, LP: +16 */ 493 rcalnewcodelp = rcalcode + 16; 494 /* Correct RCAL code + 1 is -15 rprogr, 11: +10 */ 495 rcalnewcode11 = rcalcode + 10; 496 /* Saturate if necessary */ 497 if (rcalnewcodelp > 0x3f) 498 rcalnewcodelp = 0x3f; 499 if (rcalnewcode11 > 0x3f) 500 rcalnewcode11 = 0x3f; 501 /* REXT=1 BYP=1 RCAL_st1<5:0>=new rcal code */ 502 tmp = 0x00f8 + rcalnewcodelp * 256; 503 /* Program into AFE_CAL_CONFIG_2 */ 504 bcm_phy_write_misc(phydev, 0x0039, 0x0003, tmp); 505 /* AFE_BIAS_CONFIG_0 10BT bias code (Bias: E4) */ 506 bcm_phy_write_misc(phydev, 0x0038, 0x0001, 0xe7e4); 507 /* invert adc clock output and 'adc refp ldo current To correct 508 * default 509 */ 510 bcm_phy_write_misc(phydev, 0x003b, 0x0000, 0x8002); 511 /* 100BT stair case, high BW, 1G stair case, alternate encode */ 512 bcm_phy_write_misc(phydev, 0x003c, 0x0003, 0xf882); 513 /* 1000BT DAC transition method per Erol, bits[32], DAC Shuffle 514 * sequence 1 + 10BT imp adjust bits 515 */ 516 bcm_phy_write_misc(phydev, 0x003d, 0x0000, 0x3201); 517 /* Non-overlap fix */ 518 bcm_phy_write_misc(phydev, 0x003a, 0x0002, 0x0c00); 519 520 /* pwdb override (rxconfig<5>) to turn on RX LDO indpendent of 521 * pwdb controls from DSP_TAP10 522 */ 523 bcm_phy_write_misc(phydev, 0x003a, 0x0001, 0x0020); 524 525 /* Remove references to channel 2 and 3 */ 526 bcm_phy_write_misc(phydev, 0x003b, 0x0002, 0x0000); 527 bcm_phy_write_misc(phydev, 0x003b, 0x0003, 0x0000); 528 529 /* Set cal_bypassb bit rxconfig<43> */ 530 bcm_phy_write_misc(phydev, 0x003a, 0x0003, 0x0800); 531 udelay(2); 532 533 /* Revert pwdb_override (rxconfig<5>) to 0 so that the RX pwr 534 * is controlled by DSP. 535 */ 536 bcm_phy_write_misc(phydev, 0x003a, 0x0001, 0x0000); 537 538 /* Drop LSB */ 539 rcalnewcode11d2 = (rcalnewcode11 & 0xfffe) / 2; 540 tmp = bcm_phy_read_misc(phydev, 0x003d, 0x0001); 541 /* Clear bits [11:5] */ 542 tmp &= ~0xfe0; 543 /* set txcfg_ch0<5>=1 (enable + set local rcal) */ 544 tmp |= 0x0020 | (rcalnewcode11d2 * 64); 545 bcm_phy_write_misc(phydev, 0x003d, 0x0001, tmp); 546 bcm_phy_write_misc(phydev, 0x003d, 0x0002, tmp); 547 548 tmp = bcm_phy_read_misc(phydev, 0x003d, 0x0000); 549 /* set txcfg<45:44>=11 (enable Rextra + invert fullscaledetect) 550 */ 551 tmp &= ~0x3000; 552 tmp |= 0x3000; 553 bcm_phy_write_misc(phydev, 0x003d, 0x0000, tmp); 554 555 return 0; 556 } 557 558 static int bcm7xxx_16nm_ephy_config_init(struct phy_device *phydev) 559 { 560 int ret, val; 561 562 ret = bcm7xxx_16nm_ephy_afe_config(phydev); 563 if (ret) 564 return ret; 565 566 ret = bcm_phy_set_eee(phydev, true); 567 if (ret) 568 return ret; 569 570 ret = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3); 571 if (ret < 0) 572 return ret; 573 574 val = ret; 575 576 /* Auto power down of DLL enabled, 577 * TXC/RXC disabled during auto power down. 578 */ 579 val &= ~BCM54XX_SHD_SCR3_DLLAPD_DIS; 580 val |= BIT(8); 581 582 ret = bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val); 583 if (ret < 0) 584 return ret; 585 586 return bcm_phy_enable_apd(phydev, true); 587 } 588 589 static int bcm7xxx_16nm_ephy_resume(struct phy_device *phydev) 590 { 591 int ret; 592 593 /* Re-apply workarounds coming out suspend/resume */ 594 ret = bcm7xxx_16nm_ephy_config_init(phydev); 595 if (ret) 596 return ret; 597 598 return genphy_config_aneg(phydev); 599 } 600 601 #define MII_BCM7XXX_REG_INVALID 0xff 602 603 static u8 bcm7xxx_28nm_ephy_regnum_to_shd(u16 regnum) 604 { 605 switch (regnum) { 606 case MDIO_CTRL1: 607 return MII_BCM7XXX_SHD_3_PCS_CTRL; 608 case MDIO_STAT1: 609 return MII_BCM7XXX_SHD_3_PCS_STATUS; 610 case MDIO_PCS_EEE_ABLE: 611 return MII_BCM7XXX_SHD_3_EEE_CAP; 612 case MDIO_AN_EEE_ADV: 613 return MII_BCM7XXX_SHD_3_AN_EEE_ADV; 614 case MDIO_AN_EEE_LPABLE: 615 return MII_BCM7XXX_SHD_3_EEE_LP; 616 case MDIO_PCS_EEE_WK_ERR: 617 return MII_BCM7XXX_SHD_3_EEE_WK_ERR; 618 default: 619 return MII_BCM7XXX_REG_INVALID; 620 } 621 } 622 623 static bool bcm7xxx_28nm_ephy_dev_valid(int devnum) 624 { 625 return devnum == MDIO_MMD_AN || devnum == MDIO_MMD_PCS; 626 } 627 628 static int bcm7xxx_28nm_ephy_read_mmd(struct phy_device *phydev, 629 int devnum, u16 regnum) 630 { 631 u8 shd = bcm7xxx_28nm_ephy_regnum_to_shd(regnum); 632 int ret; 633 634 if (!bcm7xxx_28nm_ephy_dev_valid(devnum) || 635 shd == MII_BCM7XXX_REG_INVALID) 636 return -EOPNOTSUPP; 637 638 /* set shadow mode 2 */ 639 ret = __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 640 MII_BCM7XXX_SHD_MODE_2, 0); 641 if (ret < 0) 642 return ret; 643 644 /* Access the desired shadow register address */ 645 ret = __phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, shd); 646 if (ret < 0) 647 goto reset_shadow_mode; 648 649 ret = __phy_read(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT); 650 651 reset_shadow_mode: 652 /* reset shadow mode 2 */ 653 __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, 654 MII_BCM7XXX_SHD_MODE_2); 655 return ret; 656 } 657 658 static int bcm7xxx_28nm_ephy_write_mmd(struct phy_device *phydev, 659 int devnum, u16 regnum, u16 val) 660 { 661 u8 shd = bcm7xxx_28nm_ephy_regnum_to_shd(regnum); 662 int ret; 663 664 if (!bcm7xxx_28nm_ephy_dev_valid(devnum) || 665 shd == MII_BCM7XXX_REG_INVALID) 666 return -EOPNOTSUPP; 667 668 /* set shadow mode 2 */ 669 ret = __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 670 MII_BCM7XXX_SHD_MODE_2, 0); 671 if (ret < 0) 672 return ret; 673 674 /* Access the desired shadow register address */ 675 ret = __phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, shd); 676 if (ret < 0) 677 goto reset_shadow_mode; 678 679 /* Write the desired value in the shadow register */ 680 __phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, val); 681 682 reset_shadow_mode: 683 /* reset shadow mode 2 */ 684 return __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, 685 MII_BCM7XXX_SHD_MODE_2); 686 } 687 688 static int bcm7xxx_28nm_ephy_resume(struct phy_device *phydev) 689 { 690 int ret; 691 692 /* Re-apply workarounds coming out suspend/resume */ 693 ret = bcm7xxx_28nm_ephy_config_init(phydev); 694 if (ret) 695 return ret; 696 697 return genphy_config_aneg(phydev); 698 } 699 700 static int bcm7xxx_config_init(struct phy_device *phydev) 701 { 702 int ret; 703 704 /* Enable 64 clock MDIO */ 705 phy_write(phydev, MII_BCM7XXX_AUX_MODE, MII_BCM7XXX_64CLK_MDIO); 706 phy_read(phydev, MII_BCM7XXX_AUX_MODE); 707 708 /* set shadow mode 2 */ 709 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 710 MII_BCM7XXX_SHD_MODE_2, MII_BCM7XXX_SHD_MODE_2); 711 if (ret < 0) 712 return ret; 713 714 /* set iddq_clkbias */ 715 phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0F00); 716 udelay(10); 717 718 /* reset iddq_clkbias */ 719 phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0C00); 720 721 phy_write(phydev, MII_BCM7XXX_100TX_FALSE_CAR, 0x7555); 722 723 /* reset shadow mode 2 */ 724 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, MII_BCM7XXX_SHD_MODE_2); 725 if (ret < 0) 726 return ret; 727 728 return 0; 729 } 730 731 /* Workaround for putting the PHY in IDDQ mode, required 732 * for all BCM7XXX 40nm and 65nm PHYs 733 */ 734 static int bcm7xxx_suspend(struct phy_device *phydev) 735 { 736 int ret; 737 static const struct bcm7xxx_regs { 738 int reg; 739 u16 value; 740 } bcm7xxx_suspend_cfg[] = { 741 { MII_BCM7XXX_TEST, 0x008b }, 742 { MII_BCM7XXX_100TX_AUX_CTL, 0x01c0 }, 743 { MII_BCM7XXX_100TX_DISC, 0x7000 }, 744 { MII_BCM7XXX_TEST, 0x000f }, 745 { MII_BCM7XXX_100TX_AUX_CTL, 0x20d0 }, 746 { MII_BCM7XXX_TEST, 0x000b }, 747 }; 748 unsigned int i; 749 750 for (i = 0; i < ARRAY_SIZE(bcm7xxx_suspend_cfg); i++) { 751 ret = phy_write(phydev, 752 bcm7xxx_suspend_cfg[i].reg, 753 bcm7xxx_suspend_cfg[i].value); 754 if (ret) 755 return ret; 756 } 757 758 return 0; 759 } 760 761 static int bcm7xxx_28nm_get_tunable(struct phy_device *phydev, 762 struct ethtool_tunable *tuna, 763 void *data) 764 { 765 switch (tuna->id) { 766 case ETHTOOL_PHY_DOWNSHIFT: 767 return bcm_phy_downshift_get(phydev, (u8 *)data); 768 default: 769 return -EOPNOTSUPP; 770 } 771 } 772 773 static int bcm7xxx_28nm_set_tunable(struct phy_device *phydev, 774 struct ethtool_tunable *tuna, 775 const void *data) 776 { 777 u8 count = *(u8 *)data; 778 int ret; 779 780 switch (tuna->id) { 781 case ETHTOOL_PHY_DOWNSHIFT: 782 ret = bcm_phy_downshift_set(phydev, count); 783 break; 784 default: 785 return -EOPNOTSUPP; 786 } 787 788 if (ret) 789 return ret; 790 791 /* Disable EEE advertisement since this prevents the PHY 792 * from successfully linking up, trigger auto-negotiation restart 793 * to let the MAC decide what to do. 794 */ 795 ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE); 796 if (ret) 797 return ret; 798 799 return genphy_restart_aneg(phydev); 800 } 801 802 static void bcm7xxx_28nm_get_phy_stats(struct phy_device *phydev, 803 struct ethtool_stats *stats, u64 *data) 804 { 805 struct bcm7xxx_phy_priv *priv = phydev->priv; 806 807 bcm_phy_get_stats(phydev, priv->stats, stats, data); 808 } 809 810 static int bcm7xxx_28nm_probe(struct phy_device *phydev) 811 { 812 struct bcm7xxx_phy_priv *priv; 813 struct clk *clk; 814 int ret = 0; 815 816 priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL); 817 if (!priv) 818 return -ENOMEM; 819 820 phydev->priv = priv; 821 822 priv->stats = devm_kcalloc(&phydev->mdio.dev, 823 bcm_phy_get_sset_count(phydev), sizeof(u64), 824 GFP_KERNEL); 825 if (!priv->stats) 826 return -ENOMEM; 827 828 clk = devm_clk_get_optional_enabled(&phydev->mdio.dev, NULL); 829 if (IS_ERR(clk)) 830 return PTR_ERR(clk); 831 832 /* Dummy read to a register to workaround an issue upon reset where the 833 * internal inverter may not allow the first MDIO transaction to pass 834 * the MDIO management controller and make us return 0xffff for such 835 * reads. This is needed to ensure that any subsequent reads to the 836 * PHY will succeed. 837 */ 838 phy_read(phydev, MII_BMSR); 839 840 return ret; 841 } 842 843 #define BCM7XXX_28NM_GPHY(_oui, _name) \ 844 { \ 845 .phy_id = (_oui), \ 846 .phy_id_mask = 0xfffffff0, \ 847 .name = _name, \ 848 /* PHY_GBIT_FEATURES */ \ 849 .flags = PHY_IS_INTERNAL, \ 850 .config_init = bcm7xxx_28nm_config_init, \ 851 .resume = bcm7xxx_28nm_resume, \ 852 .get_tunable = bcm7xxx_28nm_get_tunable, \ 853 .set_tunable = bcm7xxx_28nm_set_tunable, \ 854 .get_sset_count = bcm_phy_get_sset_count, \ 855 .get_strings = bcm_phy_get_strings, \ 856 .get_stats = bcm7xxx_28nm_get_phy_stats, \ 857 .probe = bcm7xxx_28nm_probe, \ 858 } 859 860 #define BCM7XXX_28NM_EPHY(_oui, _name) \ 861 { \ 862 .phy_id = (_oui), \ 863 .phy_id_mask = 0xfffffff0, \ 864 .name = _name, \ 865 /* PHY_BASIC_FEATURES */ \ 866 .flags = PHY_IS_INTERNAL, \ 867 .config_init = bcm7xxx_28nm_ephy_config_init, \ 868 .resume = bcm7xxx_28nm_ephy_resume, \ 869 .get_sset_count = bcm_phy_get_sset_count, \ 870 .get_strings = bcm_phy_get_strings, \ 871 .get_stats = bcm7xxx_28nm_get_phy_stats, \ 872 .probe = bcm7xxx_28nm_probe, \ 873 .read_mmd = bcm7xxx_28nm_ephy_read_mmd, \ 874 .write_mmd = bcm7xxx_28nm_ephy_write_mmd, \ 875 } 876 877 #define BCM7XXX_40NM_EPHY(_oui, _name) \ 878 { \ 879 .phy_id = (_oui), \ 880 .phy_id_mask = 0xfffffff0, \ 881 .name = _name, \ 882 /* PHY_BASIC_FEATURES */ \ 883 .flags = PHY_IS_INTERNAL, \ 884 .soft_reset = genphy_soft_reset, \ 885 .config_init = bcm7xxx_config_init, \ 886 .suspend = bcm7xxx_suspend, \ 887 .resume = bcm7xxx_config_init, \ 888 } 889 890 #define BCM7XXX_16NM_EPHY(_oui, _name) \ 891 { \ 892 .phy_id = (_oui), \ 893 .phy_id_mask = 0xfffffff0, \ 894 .name = _name, \ 895 /* PHY_BASIC_FEATURES */ \ 896 .flags = PHY_IS_INTERNAL, \ 897 .probe = bcm7xxx_28nm_probe, \ 898 .config_init = bcm7xxx_16nm_ephy_config_init, \ 899 .config_aneg = genphy_config_aneg, \ 900 .read_status = genphy_read_status, \ 901 .resume = bcm7xxx_16nm_ephy_resume, \ 902 } 903 904 static struct phy_driver bcm7xxx_driver[] = { 905 BCM7XXX_28NM_EPHY(PHY_ID_BCM72113, "Broadcom BCM72113"), 906 BCM7XXX_28NM_EPHY(PHY_ID_BCM72116, "Broadcom BCM72116"), 907 BCM7XXX_16NM_EPHY(PHY_ID_BCM72165, "Broadcom BCM72165"), 908 BCM7XXX_28NM_GPHY(PHY_ID_BCM7250, "Broadcom BCM7250"), 909 BCM7XXX_28NM_EPHY(PHY_ID_BCM7255, "Broadcom BCM7255"), 910 BCM7XXX_28NM_EPHY(PHY_ID_BCM7260, "Broadcom BCM7260"), 911 BCM7XXX_28NM_EPHY(PHY_ID_BCM7268, "Broadcom BCM7268"), 912 BCM7XXX_28NM_EPHY(PHY_ID_BCM7271, "Broadcom BCM7271"), 913 BCM7XXX_28NM_GPHY(PHY_ID_BCM7278, "Broadcom BCM7278"), 914 BCM7XXX_28NM_GPHY(PHY_ID_BCM7364, "Broadcom BCM7364"), 915 BCM7XXX_28NM_GPHY(PHY_ID_BCM7366, "Broadcom BCM7366"), 916 BCM7XXX_16NM_EPHY(PHY_ID_BCM74165, "Broadcom BCM74165"), 917 BCM7XXX_28NM_GPHY(PHY_ID_BCM74371, "Broadcom BCM74371"), 918 BCM7XXX_28NM_GPHY(PHY_ID_BCM7439, "Broadcom BCM7439"), 919 BCM7XXX_28NM_GPHY(PHY_ID_BCM7439_2, "Broadcom BCM7439 (2)"), 920 BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"), 921 BCM7XXX_40NM_EPHY(PHY_ID_BCM7346, "Broadcom BCM7346"), 922 BCM7XXX_40NM_EPHY(PHY_ID_BCM7362, "Broadcom BCM7362"), 923 BCM7XXX_40NM_EPHY(PHY_ID_BCM7425, "Broadcom BCM7425"), 924 BCM7XXX_40NM_EPHY(PHY_ID_BCM7429, "Broadcom BCM7429"), 925 BCM7XXX_40NM_EPHY(PHY_ID_BCM7435, "Broadcom BCM7435"), 926 BCM7XXX_16NM_EPHY(PHY_ID_BCM7712, "Broadcom BCM7712"), 927 }; 928 929 static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = { 930 { PHY_ID_BCM72113, 0xfffffff0 }, 931 { PHY_ID_BCM72116, 0xfffffff0, }, 932 { PHY_ID_BCM72165, 0xfffffff0, }, 933 { PHY_ID_BCM7250, 0xfffffff0, }, 934 { PHY_ID_BCM7255, 0xfffffff0, }, 935 { PHY_ID_BCM7260, 0xfffffff0, }, 936 { PHY_ID_BCM7268, 0xfffffff0, }, 937 { PHY_ID_BCM7271, 0xfffffff0, }, 938 { PHY_ID_BCM7278, 0xfffffff0, }, 939 { PHY_ID_BCM7364, 0xfffffff0, }, 940 { PHY_ID_BCM7366, 0xfffffff0, }, 941 { PHY_ID_BCM7346, 0xfffffff0, }, 942 { PHY_ID_BCM7362, 0xfffffff0, }, 943 { PHY_ID_BCM7425, 0xfffffff0, }, 944 { PHY_ID_BCM7429, 0xfffffff0, }, 945 { PHY_ID_BCM74371, 0xfffffff0, }, 946 { PHY_ID_BCM7439, 0xfffffff0, }, 947 { PHY_ID_BCM7435, 0xfffffff0, }, 948 { PHY_ID_BCM7445, 0xfffffff0, }, 949 { PHY_ID_BCM7712, 0xfffffff0, }, 950 { } 951 }; 952 953 module_phy_driver(bcm7xxx_driver); 954 955 MODULE_DEVICE_TABLE(mdio, bcm7xxx_tbl); 956 957 MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver"); 958 MODULE_LICENSE("GPL"); 959 MODULE_AUTHOR("Broadcom Corporation"); 960