1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017 Pengutronix, Juergen Borleis <kernel@pengutronix.de> 4 */ 5 #include <linux/kernel.h> 6 #include <linux/module.h> 7 #include <linux/gpio/consumer.h> 8 #include <linux/regmap.h> 9 #include <linux/mutex.h> 10 #include <linux/mii.h> 11 #include <linux/phy.h> 12 #include <linux/if_bridge.h> 13 #include <linux/etherdevice.h> 14 15 #include "lan9303.h" 16 17 #define LAN9303_NUM_PORTS 3 18 19 /* 13.2 System Control and Status Registers 20 * Multiply register number by 4 to get address offset. 21 */ 22 #define LAN9303_CHIP_REV 0x14 23 # define LAN9303_CHIP_ID 0x9303 24 #define LAN9303_IRQ_CFG 0x15 25 # define LAN9303_IRQ_CFG_IRQ_ENABLE BIT(8) 26 # define LAN9303_IRQ_CFG_IRQ_POL BIT(4) 27 # define LAN9303_IRQ_CFG_IRQ_TYPE BIT(0) 28 #define LAN9303_INT_STS 0x16 29 # define LAN9303_INT_STS_PHY_INT2 BIT(27) 30 # define LAN9303_INT_STS_PHY_INT1 BIT(26) 31 #define LAN9303_INT_EN 0x17 32 # define LAN9303_INT_EN_PHY_INT2_EN BIT(27) 33 # define LAN9303_INT_EN_PHY_INT1_EN BIT(26) 34 #define LAN9303_HW_CFG 0x1D 35 # define LAN9303_HW_CFG_READY BIT(27) 36 # define LAN9303_HW_CFG_AMDX_EN_PORT2 BIT(26) 37 # define LAN9303_HW_CFG_AMDX_EN_PORT1 BIT(25) 38 #define LAN9303_PMI_DATA 0x29 39 #define LAN9303_PMI_ACCESS 0x2A 40 # define LAN9303_PMI_ACCESS_PHY_ADDR(x) (((x) & 0x1f) << 11) 41 # define LAN9303_PMI_ACCESS_MIIRINDA(x) (((x) & 0x1f) << 6) 42 # define LAN9303_PMI_ACCESS_MII_BUSY BIT(0) 43 # define LAN9303_PMI_ACCESS_MII_WRITE BIT(1) 44 #define LAN9303_MANUAL_FC_1 0x68 45 #define LAN9303_MANUAL_FC_2 0x69 46 #define LAN9303_MANUAL_FC_0 0x6a 47 #define LAN9303_SWITCH_CSR_DATA 0x6b 48 #define LAN9303_SWITCH_CSR_CMD 0x6c 49 #define LAN9303_SWITCH_CSR_CMD_BUSY BIT(31) 50 #define LAN9303_SWITCH_CSR_CMD_RW BIT(30) 51 #define LAN9303_SWITCH_CSR_CMD_LANES (BIT(19) | BIT(18) | BIT(17) | BIT(16)) 52 #define LAN9303_VIRT_PHY_BASE 0x70 53 #define LAN9303_VIRT_SPECIAL_CTRL 0x77 54 #define LAN9303_VIRT_SPECIAL_TURBO BIT(10) /*Turbo MII Enable*/ 55 56 /*13.4 Switch Fabric Control and Status Registers 57 * Accessed indirectly via SWITCH_CSR_CMD, SWITCH_CSR_DATA. 58 */ 59 #define LAN9303_SW_DEV_ID 0x0000 60 #define LAN9303_SW_RESET 0x0001 61 #define LAN9303_SW_RESET_RESET BIT(0) 62 #define LAN9303_SW_IMR 0x0004 63 #define LAN9303_SW_IPR 0x0005 64 #define LAN9303_MAC_VER_ID_0 0x0400 65 #define LAN9303_MAC_RX_CFG_0 0x0401 66 # define LAN9303_MAC_RX_CFG_X_REJECT_MAC_TYPES BIT(1) 67 # define LAN9303_MAC_RX_CFG_X_RX_ENABLE BIT(0) 68 #define LAN9303_MAC_RX_UNDSZE_CNT_0 0x0410 69 #define LAN9303_MAC_RX_64_CNT_0 0x0411 70 #define LAN9303_MAC_RX_127_CNT_0 0x0412 71 #define LAN9303_MAC_RX_255_CNT_0 0x413 72 #define LAN9303_MAC_RX_511_CNT_0 0x0414 73 #define LAN9303_MAC_RX_1023_CNT_0 0x0415 74 #define LAN9303_MAC_RX_MAX_CNT_0 0x0416 75 #define LAN9303_MAC_RX_OVRSZE_CNT_0 0x0417 76 #define LAN9303_MAC_RX_PKTOK_CNT_0 0x0418 77 #define LAN9303_MAC_RX_CRCERR_CNT_0 0x0419 78 #define LAN9303_MAC_RX_MULCST_CNT_0 0x041a 79 #define LAN9303_MAC_RX_BRDCST_CNT_0 0x041b 80 #define LAN9303_MAC_RX_PAUSE_CNT_0 0x041c 81 #define LAN9303_MAC_RX_FRAG_CNT_0 0x041d 82 #define LAN9303_MAC_RX_JABB_CNT_0 0x041e 83 #define LAN9303_MAC_RX_ALIGN_CNT_0 0x041f 84 #define LAN9303_MAC_RX_PKTLEN_CNT_0 0x0420 85 #define LAN9303_MAC_RX_GOODPKTLEN_CNT_0 0x0421 86 #define LAN9303_MAC_RX_SYMBL_CNT_0 0x0422 87 #define LAN9303_MAC_RX_CTLFRM_CNT_0 0x0423 88 89 #define LAN9303_MAC_TX_CFG_0 0x0440 90 # define LAN9303_MAC_TX_CFG_X_TX_IFG_CONFIG_DEFAULT (21 << 2) 91 # define LAN9303_MAC_TX_CFG_X_TX_PAD_ENABLE BIT(1) 92 # define LAN9303_MAC_TX_CFG_X_TX_ENABLE BIT(0) 93 #define LAN9303_MAC_TX_DEFER_CNT_0 0x0451 94 #define LAN9303_MAC_TX_PAUSE_CNT_0 0x0452 95 #define LAN9303_MAC_TX_PKTOK_CNT_0 0x0453 96 #define LAN9303_MAC_TX_64_CNT_0 0x0454 97 #define LAN9303_MAC_TX_127_CNT_0 0x0455 98 #define LAN9303_MAC_TX_255_CNT_0 0x0456 99 #define LAN9303_MAC_TX_511_CNT_0 0x0457 100 #define LAN9303_MAC_TX_1023_CNT_0 0x0458 101 #define LAN9303_MAC_TX_MAX_CNT_0 0x0459 102 #define LAN9303_MAC_TX_UNDSZE_CNT_0 0x045a 103 #define LAN9303_MAC_TX_PKTLEN_CNT_0 0x045c 104 #define LAN9303_MAC_TX_BRDCST_CNT_0 0x045d 105 #define LAN9303_MAC_TX_MULCST_CNT_0 0x045e 106 #define LAN9303_MAC_TX_LATECOL_0 0x045f 107 #define LAN9303_MAC_TX_EXCOL_CNT_0 0x0460 108 #define LAN9303_MAC_TX_SNGLECOL_CNT_0 0x0461 109 #define LAN9303_MAC_TX_MULTICOL_CNT_0 0x0462 110 #define LAN9303_MAC_TX_TOTALCOL_CNT_0 0x0463 111 112 #define LAN9303_MAC_VER_ID_1 0x0800 113 #define LAN9303_MAC_RX_CFG_1 0x0801 114 #define LAN9303_MAC_TX_CFG_1 0x0840 115 #define LAN9303_MAC_VER_ID_2 0x0c00 116 #define LAN9303_MAC_RX_CFG_2 0x0c01 117 #define LAN9303_MAC_TX_CFG_2 0x0c40 118 #define LAN9303_SWE_ALR_CMD 0x1800 119 # define LAN9303_ALR_CMD_MAKE_ENTRY BIT(2) 120 # define LAN9303_ALR_CMD_GET_FIRST BIT(1) 121 # define LAN9303_ALR_CMD_GET_NEXT BIT(0) 122 #define LAN9303_SWE_ALR_WR_DAT_0 0x1801 123 #define LAN9303_SWE_ALR_WR_DAT_1 0x1802 124 # define LAN9303_ALR_DAT1_VALID BIT(26) 125 # define LAN9303_ALR_DAT1_END_OF_TABL BIT(25) 126 # define LAN9303_ALR_DAT1_AGE_OVERRID BIT(25) 127 # define LAN9303_ALR_DAT1_STATIC BIT(24) 128 # define LAN9303_ALR_DAT1_PORT_BITOFFS 16 129 # define LAN9303_ALR_DAT1_PORT_MASK (7 << LAN9303_ALR_DAT1_PORT_BITOFFS) 130 #define LAN9303_SWE_ALR_RD_DAT_0 0x1805 131 #define LAN9303_SWE_ALR_RD_DAT_1 0x1806 132 #define LAN9303_SWE_ALR_CMD_STS 0x1808 133 # define ALR_STS_MAKE_PEND BIT(0) 134 #define LAN9303_SWE_VLAN_CMD 0x180b 135 # define LAN9303_SWE_VLAN_CMD_RNW BIT(5) 136 # define LAN9303_SWE_VLAN_CMD_PVIDNVLAN BIT(4) 137 #define LAN9303_SWE_VLAN_WR_DATA 0x180c 138 #define LAN9303_SWE_VLAN_RD_DATA 0x180e 139 # define LAN9303_SWE_VLAN_MEMBER_PORT2 BIT(17) 140 # define LAN9303_SWE_VLAN_UNTAG_PORT2 BIT(16) 141 # define LAN9303_SWE_VLAN_MEMBER_PORT1 BIT(15) 142 # define LAN9303_SWE_VLAN_UNTAG_PORT1 BIT(14) 143 # define LAN9303_SWE_VLAN_MEMBER_PORT0 BIT(13) 144 # define LAN9303_SWE_VLAN_UNTAG_PORT0 BIT(12) 145 #define LAN9303_SWE_VLAN_CMD_STS 0x1810 146 #define LAN9303_SWE_GLB_INGRESS_CFG 0x1840 147 # define LAN9303_SWE_GLB_INGR_IGMP_TRAP BIT(7) 148 # define LAN9303_SWE_GLB_INGR_IGMP_PORT(p) BIT(10 + p) 149 #define LAN9303_SWE_PORT_STATE 0x1843 150 # define LAN9303_SWE_PORT_STATE_FORWARDING_PORT2 (0) 151 # define LAN9303_SWE_PORT_STATE_LEARNING_PORT2 BIT(5) 152 # define LAN9303_SWE_PORT_STATE_BLOCKING_PORT2 BIT(4) 153 # define LAN9303_SWE_PORT_STATE_FORWARDING_PORT1 (0) 154 # define LAN9303_SWE_PORT_STATE_LEARNING_PORT1 BIT(3) 155 # define LAN9303_SWE_PORT_STATE_BLOCKING_PORT1 BIT(2) 156 # define LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 (0) 157 # define LAN9303_SWE_PORT_STATE_LEARNING_PORT0 BIT(1) 158 # define LAN9303_SWE_PORT_STATE_BLOCKING_PORT0 BIT(0) 159 # define LAN9303_SWE_PORT_STATE_DISABLED_PORT0 (3) 160 #define LAN9303_SWE_PORT_MIRROR 0x1846 161 # define LAN9303_SWE_PORT_MIRROR_SNIFF_ALL BIT(8) 162 # define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT2 BIT(7) 163 # define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT1 BIT(6) 164 # define LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT0 BIT(5) 165 # define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT2 BIT(4) 166 # define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT1 BIT(3) 167 # define LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT0 BIT(2) 168 # define LAN9303_SWE_PORT_MIRROR_ENABLE_RX_MIRRORING BIT(1) 169 # define LAN9303_SWE_PORT_MIRROR_ENABLE_TX_MIRRORING BIT(0) 170 # define LAN9303_SWE_PORT_MIRROR_DISABLED 0 171 #define LAN9303_SWE_INGRESS_PORT_TYPE 0x1847 172 #define LAN9303_SWE_INGRESS_PORT_TYPE_VLAN 3 173 #define LAN9303_BM_CFG 0x1c00 174 #define LAN9303_BM_EGRSS_PORT_TYPE 0x1c0c 175 # define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT2 (BIT(17) | BIT(16)) 176 # define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT1 (BIT(9) | BIT(8)) 177 # define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0 (BIT(1) | BIT(0)) 178 179 #define LAN9303_SWITCH_PORT_REG(port, reg0) (0x400 * (port) + (reg0)) 180 181 /* the built-in PHYs are of type LAN911X */ 182 #define MII_LAN911X_SPECIAL_MODES 0x12 183 #define MII_LAN911X_SPECIAL_CONTROL_STATUS 0x1f 184 185 static const struct regmap_range lan9303_valid_regs[] = { 186 regmap_reg_range(0x14, 0x17), /* misc, interrupt */ 187 regmap_reg_range(0x19, 0x19), /* endian test */ 188 regmap_reg_range(0x1d, 0x1d), /* hardware config */ 189 regmap_reg_range(0x23, 0x24), /* general purpose timer */ 190 regmap_reg_range(0x27, 0x27), /* counter */ 191 regmap_reg_range(0x29, 0x2a), /* PMI index regs */ 192 regmap_reg_range(0x68, 0x6a), /* flow control */ 193 regmap_reg_range(0x6b, 0x6c), /* switch fabric indirect regs */ 194 regmap_reg_range(0x6d, 0x6f), /* misc */ 195 regmap_reg_range(0x70, 0x77), /* virtual phy */ 196 regmap_reg_range(0x78, 0x7a), /* GPIO */ 197 regmap_reg_range(0x7c, 0x7e), /* MAC & reset */ 198 regmap_reg_range(0x80, 0xb7), /* switch fabric direct regs (wr only) */ 199 }; 200 201 static const struct regmap_range lan9303_reserved_ranges[] = { 202 regmap_reg_range(0x00, 0x13), 203 regmap_reg_range(0x18, 0x18), 204 regmap_reg_range(0x1a, 0x1c), 205 regmap_reg_range(0x1e, 0x22), 206 regmap_reg_range(0x25, 0x26), 207 regmap_reg_range(0x28, 0x28), 208 regmap_reg_range(0x2b, 0x67), 209 regmap_reg_range(0x7b, 0x7b), 210 regmap_reg_range(0x7f, 0x7f), 211 regmap_reg_range(0xb8, 0xff), 212 }; 213 214 const struct regmap_access_table lan9303_register_set = { 215 .yes_ranges = lan9303_valid_regs, 216 .n_yes_ranges = ARRAY_SIZE(lan9303_valid_regs), 217 .no_ranges = lan9303_reserved_ranges, 218 .n_no_ranges = ARRAY_SIZE(lan9303_reserved_ranges), 219 }; 220 EXPORT_SYMBOL(lan9303_register_set); 221 222 static int lan9303_read(struct regmap *regmap, unsigned int offset, u32 *reg) 223 { 224 int ret, i; 225 226 /* we can lose arbitration for the I2C case, because the device 227 * tries to detect and read an external EEPROM after reset and acts as 228 * a master on the shared I2C bus itself. This conflicts with our 229 * attempts to access the device as a slave at the same moment. 230 */ 231 for (i = 0; i < 5; i++) { 232 ret = regmap_read(regmap, offset, reg); 233 if (!ret) 234 return 0; 235 if (ret != -EAGAIN) 236 break; 237 msleep(500); 238 } 239 240 return -EIO; 241 } 242 243 static int lan9303_read_wait(struct lan9303 *chip, int offset, u32 mask) 244 { 245 int i; 246 247 for (i = 0; i < 25; i++) { 248 u32 reg; 249 int ret; 250 251 ret = lan9303_read(chip->regmap, offset, ®); 252 if (ret) { 253 dev_err(chip->dev, "%s failed to read offset %d: %d\n", 254 __func__, offset, ret); 255 return ret; 256 } 257 if (!(reg & mask)) 258 return 0; 259 usleep_range(1000, 2000); 260 } 261 262 return -ETIMEDOUT; 263 } 264 265 static int lan9303_virt_phy_reg_read(struct lan9303 *chip, int regnum) 266 { 267 int ret; 268 u32 val; 269 270 if (regnum > MII_EXPANSION) 271 return -EINVAL; 272 273 ret = lan9303_read(chip->regmap, LAN9303_VIRT_PHY_BASE + regnum, &val); 274 if (ret) 275 return ret; 276 277 return val & 0xffff; 278 } 279 280 static int lan9303_virt_phy_reg_write(struct lan9303 *chip, int regnum, u16 val) 281 { 282 if (regnum > MII_EXPANSION) 283 return -EINVAL; 284 285 return regmap_write(chip->regmap, LAN9303_VIRT_PHY_BASE + regnum, val); 286 } 287 288 static int lan9303_indirect_phy_wait_for_completion(struct lan9303 *chip) 289 { 290 return lan9303_read_wait(chip, LAN9303_PMI_ACCESS, 291 LAN9303_PMI_ACCESS_MII_BUSY); 292 } 293 294 static int lan9303_indirect_phy_read(struct lan9303 *chip, int addr, int regnum) 295 { 296 int ret; 297 u32 val; 298 299 val = LAN9303_PMI_ACCESS_PHY_ADDR(addr); 300 val |= LAN9303_PMI_ACCESS_MIIRINDA(regnum); 301 302 mutex_lock(&chip->indirect_mutex); 303 304 ret = lan9303_indirect_phy_wait_for_completion(chip); 305 if (ret) 306 goto on_error; 307 308 /* start the MII read cycle */ 309 ret = regmap_write(chip->regmap, LAN9303_PMI_ACCESS, val); 310 if (ret) 311 goto on_error; 312 313 ret = lan9303_indirect_phy_wait_for_completion(chip); 314 if (ret) 315 goto on_error; 316 317 /* read the result of this operation */ 318 ret = lan9303_read(chip->regmap, LAN9303_PMI_DATA, &val); 319 if (ret) 320 goto on_error; 321 322 mutex_unlock(&chip->indirect_mutex); 323 324 return val & 0xffff; 325 326 on_error: 327 mutex_unlock(&chip->indirect_mutex); 328 return ret; 329 } 330 331 static int lan9303_indirect_phy_write(struct lan9303 *chip, int addr, 332 int regnum, u16 val) 333 { 334 int ret; 335 u32 reg; 336 337 reg = LAN9303_PMI_ACCESS_PHY_ADDR(addr); 338 reg |= LAN9303_PMI_ACCESS_MIIRINDA(regnum); 339 reg |= LAN9303_PMI_ACCESS_MII_WRITE; 340 341 mutex_lock(&chip->indirect_mutex); 342 343 ret = lan9303_indirect_phy_wait_for_completion(chip); 344 if (ret) 345 goto on_error; 346 347 /* write the data first... */ 348 ret = regmap_write(chip->regmap, LAN9303_PMI_DATA, val); 349 if (ret) 350 goto on_error; 351 352 /* ...then start the MII write cycle */ 353 ret = regmap_write(chip->regmap, LAN9303_PMI_ACCESS, reg); 354 355 on_error: 356 mutex_unlock(&chip->indirect_mutex); 357 return ret; 358 } 359 360 const struct lan9303_phy_ops lan9303_indirect_phy_ops = { 361 .phy_read = lan9303_indirect_phy_read, 362 .phy_write = lan9303_indirect_phy_write, 363 }; 364 EXPORT_SYMBOL_GPL(lan9303_indirect_phy_ops); 365 366 static int lan9303_switch_wait_for_completion(struct lan9303 *chip) 367 { 368 return lan9303_read_wait(chip, LAN9303_SWITCH_CSR_CMD, 369 LAN9303_SWITCH_CSR_CMD_BUSY); 370 } 371 372 static int lan9303_write_switch_reg(struct lan9303 *chip, u16 regnum, u32 val) 373 { 374 u32 reg; 375 int ret; 376 377 reg = regnum; 378 reg |= LAN9303_SWITCH_CSR_CMD_LANES; 379 reg |= LAN9303_SWITCH_CSR_CMD_BUSY; 380 381 mutex_lock(&chip->indirect_mutex); 382 383 ret = lan9303_switch_wait_for_completion(chip); 384 if (ret) 385 goto on_error; 386 387 ret = regmap_write(chip->regmap, LAN9303_SWITCH_CSR_DATA, val); 388 if (ret) { 389 dev_err(chip->dev, "Failed to write csr data reg: %d\n", ret); 390 goto on_error; 391 } 392 393 /* trigger write */ 394 ret = regmap_write(chip->regmap, LAN9303_SWITCH_CSR_CMD, reg); 395 if (ret) 396 dev_err(chip->dev, "Failed to write csr command reg: %d\n", 397 ret); 398 399 on_error: 400 mutex_unlock(&chip->indirect_mutex); 401 return ret; 402 } 403 404 static int lan9303_read_switch_reg(struct lan9303 *chip, u16 regnum, u32 *val) 405 { 406 u32 reg; 407 int ret; 408 409 reg = regnum; 410 reg |= LAN9303_SWITCH_CSR_CMD_LANES; 411 reg |= LAN9303_SWITCH_CSR_CMD_RW; 412 reg |= LAN9303_SWITCH_CSR_CMD_BUSY; 413 414 mutex_lock(&chip->indirect_mutex); 415 416 ret = lan9303_switch_wait_for_completion(chip); 417 if (ret) 418 goto on_error; 419 420 /* trigger read */ 421 ret = regmap_write(chip->regmap, LAN9303_SWITCH_CSR_CMD, reg); 422 if (ret) { 423 dev_err(chip->dev, "Failed to write csr command reg: %d\n", 424 ret); 425 goto on_error; 426 } 427 428 ret = lan9303_switch_wait_for_completion(chip); 429 if (ret) 430 goto on_error; 431 432 ret = lan9303_read(chip->regmap, LAN9303_SWITCH_CSR_DATA, val); 433 if (ret) 434 dev_err(chip->dev, "Failed to read csr data reg: %d\n", ret); 435 on_error: 436 mutex_unlock(&chip->indirect_mutex); 437 return ret; 438 } 439 440 static int lan9303_write_switch_reg_mask(struct lan9303 *chip, u16 regnum, 441 u32 val, u32 mask) 442 { 443 int ret; 444 u32 reg; 445 446 ret = lan9303_read_switch_reg(chip, regnum, ®); 447 if (ret) 448 return ret; 449 450 reg = (reg & ~mask) | val; 451 452 return lan9303_write_switch_reg(chip, regnum, reg); 453 } 454 455 static int lan9303_write_switch_port(struct lan9303 *chip, int port, 456 u16 regnum, u32 val) 457 { 458 return lan9303_write_switch_reg( 459 chip, LAN9303_SWITCH_PORT_REG(port, regnum), val); 460 } 461 462 static int lan9303_read_switch_port(struct lan9303 *chip, int port, 463 u16 regnum, u32 *val) 464 { 465 return lan9303_read_switch_reg( 466 chip, LAN9303_SWITCH_PORT_REG(port, regnum), val); 467 } 468 469 static int lan9303_detect_phy_setup(struct lan9303 *chip) 470 { 471 int reg; 472 473 /* Calculate chip->phy_addr_base: 474 * Depending on the 'phy_addr_sel_strap' setting, the three phys are 475 * using IDs 0-1-2 or IDs 1-2-3. We cannot read back the 476 * 'phy_addr_sel_strap' setting directly, so we need a test, which 477 * configuration is active: 478 * Special reg 18 of phy 3 reads as 0x0000, if 'phy_addr_sel_strap' is 0 479 * and the IDs are 0-1-2, else it contains something different from 480 * 0x0000, which means 'phy_addr_sel_strap' is 1 and the IDs are 1-2-3. 481 * 0xffff is returned on MDIO read with no response. 482 */ 483 reg = chip->ops->phy_read(chip, 3, MII_LAN911X_SPECIAL_MODES); 484 if (reg < 0) { 485 dev_err(chip->dev, "Failed to detect phy config: %d\n", reg); 486 return reg; 487 } 488 489 chip->phy_addr_base = reg != 0 && reg != 0xffff; 490 491 dev_dbg(chip->dev, "Phy setup '%s' detected\n", 492 chip->phy_addr_base ? "1-2-3" : "0-1-2"); 493 494 return 0; 495 } 496 497 /* Map ALR-port bits to port bitmap, and back */ 498 static const int alrport_2_portmap[] = {1, 2, 4, 0, 3, 5, 6, 7 }; 499 static const int portmap_2_alrport[] = {3, 0, 1, 4, 2, 5, 6, 7 }; 500 501 /* Return pointer to first free ALR cache entry, return NULL if none */ 502 static struct lan9303_alr_cache_entry * 503 lan9303_alr_cache_find_free(struct lan9303 *chip) 504 { 505 int i; 506 struct lan9303_alr_cache_entry *entr = chip->alr_cache; 507 508 for (i = 0; i < LAN9303_NUM_ALR_RECORDS; i++, entr++) 509 if (entr->port_map == 0) 510 return entr; 511 512 return NULL; 513 } 514 515 /* Return pointer to ALR cache entry matching MAC address */ 516 static struct lan9303_alr_cache_entry * 517 lan9303_alr_cache_find_mac(struct lan9303 *chip, const u8 *mac_addr) 518 { 519 int i; 520 struct lan9303_alr_cache_entry *entr = chip->alr_cache; 521 522 BUILD_BUG_ON_MSG(sizeof(struct lan9303_alr_cache_entry) & 1, 523 "ether_addr_equal require u16 alignment"); 524 525 for (i = 0; i < LAN9303_NUM_ALR_RECORDS; i++, entr++) 526 if (ether_addr_equal(entr->mac_addr, mac_addr)) 527 return entr; 528 529 return NULL; 530 } 531 532 static int lan9303_csr_reg_wait(struct lan9303 *chip, int regno, u32 mask) 533 { 534 int i; 535 536 for (i = 0; i < 25; i++) { 537 u32 reg; 538 539 lan9303_read_switch_reg(chip, regno, ®); 540 if (!(reg & mask)) 541 return 0; 542 usleep_range(1000, 2000); 543 } 544 545 return -ETIMEDOUT; 546 } 547 548 static int lan9303_alr_make_entry_raw(struct lan9303 *chip, u32 dat0, u32 dat1) 549 { 550 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_WR_DAT_0, dat0); 551 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_WR_DAT_1, dat1); 552 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 553 LAN9303_ALR_CMD_MAKE_ENTRY); 554 lan9303_csr_reg_wait(chip, LAN9303_SWE_ALR_CMD_STS, ALR_STS_MAKE_PEND); 555 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 0); 556 557 return 0; 558 } 559 560 typedef void alr_loop_cb_t(struct lan9303 *chip, u32 dat0, u32 dat1, 561 int portmap, void *ctx); 562 563 static void lan9303_alr_loop(struct lan9303 *chip, alr_loop_cb_t *cb, void *ctx) 564 { 565 int i; 566 567 mutex_lock(&chip->alr_mutex); 568 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 569 LAN9303_ALR_CMD_GET_FIRST); 570 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 0); 571 572 for (i = 1; i < LAN9303_NUM_ALR_RECORDS; i++) { 573 u32 dat0, dat1; 574 int alrport, portmap; 575 576 lan9303_read_switch_reg(chip, LAN9303_SWE_ALR_RD_DAT_0, &dat0); 577 lan9303_read_switch_reg(chip, LAN9303_SWE_ALR_RD_DAT_1, &dat1); 578 if (dat1 & LAN9303_ALR_DAT1_END_OF_TABL) 579 break; 580 581 alrport = (dat1 & LAN9303_ALR_DAT1_PORT_MASK) >> 582 LAN9303_ALR_DAT1_PORT_BITOFFS; 583 portmap = alrport_2_portmap[alrport]; 584 585 cb(chip, dat0, dat1, portmap, ctx); 586 587 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 588 LAN9303_ALR_CMD_GET_NEXT); 589 lan9303_write_switch_reg(chip, LAN9303_SWE_ALR_CMD, 0); 590 } 591 mutex_unlock(&chip->alr_mutex); 592 } 593 594 static void alr_reg_to_mac(u32 dat0, u32 dat1, u8 mac[6]) 595 { 596 mac[0] = (dat0 >> 0) & 0xff; 597 mac[1] = (dat0 >> 8) & 0xff; 598 mac[2] = (dat0 >> 16) & 0xff; 599 mac[3] = (dat0 >> 24) & 0xff; 600 mac[4] = (dat1 >> 0) & 0xff; 601 mac[5] = (dat1 >> 8) & 0xff; 602 } 603 604 struct del_port_learned_ctx { 605 int port; 606 }; 607 608 /* Clear learned (non-static) entry on given port */ 609 static void alr_loop_cb_del_port_learned(struct lan9303 *chip, u32 dat0, 610 u32 dat1, int portmap, void *ctx) 611 { 612 struct del_port_learned_ctx *del_ctx = ctx; 613 int port = del_ctx->port; 614 615 if (((BIT(port) & portmap) == 0) || (dat1 & LAN9303_ALR_DAT1_STATIC)) 616 return; 617 618 /* learned entries has only one port, we can just delete */ 619 dat1 &= ~LAN9303_ALR_DAT1_VALID; /* delete entry */ 620 lan9303_alr_make_entry_raw(chip, dat0, dat1); 621 } 622 623 struct port_fdb_dump_ctx { 624 int port; 625 void *data; 626 dsa_fdb_dump_cb_t *cb; 627 }; 628 629 static void alr_loop_cb_fdb_port_dump(struct lan9303 *chip, u32 dat0, 630 u32 dat1, int portmap, void *ctx) 631 { 632 struct port_fdb_dump_ctx *dump_ctx = ctx; 633 u8 mac[ETH_ALEN]; 634 bool is_static; 635 636 if ((BIT(dump_ctx->port) & portmap) == 0) 637 return; 638 639 alr_reg_to_mac(dat0, dat1, mac); 640 is_static = !!(dat1 & LAN9303_ALR_DAT1_STATIC); 641 dump_ctx->cb(mac, 0, is_static, dump_ctx->data); 642 } 643 644 /* Set a static ALR entry. Delete entry if port_map is zero */ 645 static void lan9303_alr_set_entry(struct lan9303 *chip, const u8 *mac, 646 u8 port_map, bool stp_override) 647 { 648 u32 dat0, dat1, alr_port; 649 650 dev_dbg(chip->dev, "%s(%pM, %d)\n", __func__, mac, port_map); 651 dat1 = LAN9303_ALR_DAT1_STATIC; 652 if (port_map) 653 dat1 |= LAN9303_ALR_DAT1_VALID; 654 /* otherwise no ports: delete entry */ 655 if (stp_override) 656 dat1 |= LAN9303_ALR_DAT1_AGE_OVERRID; 657 658 alr_port = portmap_2_alrport[port_map & 7]; 659 dat1 &= ~LAN9303_ALR_DAT1_PORT_MASK; 660 dat1 |= alr_port << LAN9303_ALR_DAT1_PORT_BITOFFS; 661 662 dat0 = 0; 663 dat0 |= (mac[0] << 0); 664 dat0 |= (mac[1] << 8); 665 dat0 |= (mac[2] << 16); 666 dat0 |= (mac[3] << 24); 667 668 dat1 |= (mac[4] << 0); 669 dat1 |= (mac[5] << 8); 670 671 lan9303_alr_make_entry_raw(chip, dat0, dat1); 672 } 673 674 /* Add port to static ALR entry, create new static entry if needed */ 675 static int lan9303_alr_add_port(struct lan9303 *chip, const u8 *mac, int port, 676 bool stp_override) 677 { 678 struct lan9303_alr_cache_entry *entr; 679 680 mutex_lock(&chip->alr_mutex); 681 entr = lan9303_alr_cache_find_mac(chip, mac); 682 if (!entr) { /*New entry */ 683 entr = lan9303_alr_cache_find_free(chip); 684 if (!entr) { 685 mutex_unlock(&chip->alr_mutex); 686 return -ENOSPC; 687 } 688 ether_addr_copy(entr->mac_addr, mac); 689 } 690 entr->port_map |= BIT(port); 691 entr->stp_override = stp_override; 692 lan9303_alr_set_entry(chip, mac, entr->port_map, stp_override); 693 mutex_unlock(&chip->alr_mutex); 694 695 return 0; 696 } 697 698 /* Delete static port from ALR entry, delete entry if last port */ 699 static int lan9303_alr_del_port(struct lan9303 *chip, const u8 *mac, int port) 700 { 701 struct lan9303_alr_cache_entry *entr; 702 703 mutex_lock(&chip->alr_mutex); 704 entr = lan9303_alr_cache_find_mac(chip, mac); 705 if (!entr) 706 goto out; /* no static entry found */ 707 708 entr->port_map &= ~BIT(port); 709 if (entr->port_map == 0) /* zero means its free again */ 710 eth_zero_addr(entr->mac_addr); 711 lan9303_alr_set_entry(chip, mac, entr->port_map, entr->stp_override); 712 713 out: 714 mutex_unlock(&chip->alr_mutex); 715 return 0; 716 } 717 718 static int lan9303_disable_processing_port(struct lan9303 *chip, 719 unsigned int port) 720 { 721 int ret; 722 723 /* disable RX, but keep register reset default values else */ 724 ret = lan9303_write_switch_port(chip, port, LAN9303_MAC_RX_CFG_0, 725 LAN9303_MAC_RX_CFG_X_REJECT_MAC_TYPES); 726 if (ret) 727 return ret; 728 729 /* disable TX, but keep register reset default values else */ 730 return lan9303_write_switch_port(chip, port, LAN9303_MAC_TX_CFG_0, 731 LAN9303_MAC_TX_CFG_X_TX_IFG_CONFIG_DEFAULT | 732 LAN9303_MAC_TX_CFG_X_TX_PAD_ENABLE); 733 } 734 735 static int lan9303_enable_processing_port(struct lan9303 *chip, 736 unsigned int port) 737 { 738 int ret; 739 740 /* enable RX and keep register reset default values else */ 741 ret = lan9303_write_switch_port(chip, port, LAN9303_MAC_RX_CFG_0, 742 LAN9303_MAC_RX_CFG_X_REJECT_MAC_TYPES | 743 LAN9303_MAC_RX_CFG_X_RX_ENABLE); 744 if (ret) 745 return ret; 746 747 /* enable TX and keep register reset default values else */ 748 return lan9303_write_switch_port(chip, port, LAN9303_MAC_TX_CFG_0, 749 LAN9303_MAC_TX_CFG_X_TX_IFG_CONFIG_DEFAULT | 750 LAN9303_MAC_TX_CFG_X_TX_PAD_ENABLE | 751 LAN9303_MAC_TX_CFG_X_TX_ENABLE); 752 } 753 754 /* forward special tagged packets from port 0 to port 1 *or* port 2 */ 755 static int lan9303_setup_tagging(struct lan9303 *chip) 756 { 757 int ret; 758 u32 val; 759 /* enable defining the destination port via special VLAN tagging 760 * for port 0 761 */ 762 ret = lan9303_write_switch_reg(chip, LAN9303_SWE_INGRESS_PORT_TYPE, 763 LAN9303_SWE_INGRESS_PORT_TYPE_VLAN); 764 if (ret) 765 return ret; 766 767 /* tag incoming packets at port 1 and 2 on their way to port 0 to be 768 * able to discover their source port 769 */ 770 val = LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0; 771 return lan9303_write_switch_reg(chip, LAN9303_BM_EGRSS_PORT_TYPE, val); 772 } 773 774 /* We want a special working switch: 775 * - do not forward packets between port 1 and 2 776 * - forward everything from port 1 to port 0 777 * - forward everything from port 2 to port 0 778 */ 779 static int lan9303_separate_ports(struct lan9303 *chip) 780 { 781 int ret; 782 783 lan9303_alr_del_port(chip, eth_stp_addr, 0); 784 ret = lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_MIRROR, 785 LAN9303_SWE_PORT_MIRROR_SNIFFER_PORT0 | 786 LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT1 | 787 LAN9303_SWE_PORT_MIRROR_MIRRORED_PORT2 | 788 LAN9303_SWE_PORT_MIRROR_ENABLE_RX_MIRRORING | 789 LAN9303_SWE_PORT_MIRROR_SNIFF_ALL); 790 if (ret) 791 return ret; 792 793 /* prevent port 1 and 2 from forwarding packets by their own */ 794 return lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE, 795 LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 | 796 LAN9303_SWE_PORT_STATE_BLOCKING_PORT1 | 797 LAN9303_SWE_PORT_STATE_BLOCKING_PORT2); 798 } 799 800 static void lan9303_bridge_ports(struct lan9303 *chip) 801 { 802 /* ports bridged: remove mirroring */ 803 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_MIRROR, 804 LAN9303_SWE_PORT_MIRROR_DISABLED); 805 806 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE, 807 chip->swe_port_state); 808 lan9303_alr_add_port(chip, eth_stp_addr, 0, true); 809 } 810 811 static void lan9303_handle_reset(struct lan9303 *chip) 812 { 813 if (!chip->reset_gpio) 814 return; 815 816 if (chip->reset_duration != 0) 817 msleep(chip->reset_duration); 818 819 /* release (deassert) reset and activate the device */ 820 gpiod_set_value_cansleep(chip->reset_gpio, 0); 821 } 822 823 /* stop processing packets for all ports */ 824 static int lan9303_disable_processing(struct lan9303 *chip) 825 { 826 int p; 827 828 for (p = 1; p < LAN9303_NUM_PORTS; p++) { 829 int ret = lan9303_disable_processing_port(chip, p); 830 831 if (ret) 832 return ret; 833 } 834 835 return 0; 836 } 837 838 static int lan9303_check_device(struct lan9303 *chip) 839 { 840 int ret; 841 u32 reg; 842 843 ret = lan9303_read(chip->regmap, LAN9303_CHIP_REV, ®); 844 if (ret) { 845 dev_err(chip->dev, "failed to read chip revision register: %d\n", 846 ret); 847 if (!chip->reset_gpio) { 848 dev_dbg(chip->dev, 849 "hint: maybe failed due to missing reset GPIO\n"); 850 } 851 return ret; 852 } 853 854 if ((reg >> 16) != LAN9303_CHIP_ID) { 855 dev_err(chip->dev, "expecting LAN9303 chip, but found: %X\n", 856 reg >> 16); 857 return -ENODEV; 858 } 859 860 /* The default state of the LAN9303 device is to forward packets between 861 * all ports (if not configured differently by an external EEPROM). 862 * The initial state of a DSA device must be forwarding packets only 863 * between the external and the internal ports and no forwarding 864 * between the external ports. In preparation we stop packet handling 865 * at all for now until the LAN9303 device is re-programmed accordingly. 866 */ 867 ret = lan9303_disable_processing(chip); 868 if (ret) 869 dev_warn(chip->dev, "failed to disable switching %d\n", ret); 870 871 dev_info(chip->dev, "Found LAN9303 rev. %u\n", reg & 0xffff); 872 873 ret = lan9303_detect_phy_setup(chip); 874 if (ret) { 875 dev_err(chip->dev, 876 "failed to discover phy bootstrap setup: %d\n", ret); 877 return ret; 878 } 879 880 return 0; 881 } 882 883 /* ---------------------------- DSA -----------------------------------*/ 884 885 static enum dsa_tag_protocol lan9303_get_tag_protocol(struct dsa_switch *ds, 886 int port, 887 enum dsa_tag_protocol mp) 888 { 889 return DSA_TAG_PROTO_LAN9303; 890 } 891 892 static int lan9303_setup(struct dsa_switch *ds) 893 { 894 struct lan9303 *chip = ds->priv; 895 int ret; 896 897 /* Make sure that port 0 is the cpu port */ 898 if (!dsa_is_cpu_port(ds, 0)) { 899 dev_err(chip->dev, "port 0 is not the CPU port\n"); 900 return -EINVAL; 901 } 902 903 ret = lan9303_setup_tagging(chip); 904 if (ret) 905 dev_err(chip->dev, "failed to setup port tagging %d\n", ret); 906 907 ret = lan9303_separate_ports(chip); 908 if (ret) 909 dev_err(chip->dev, "failed to separate ports %d\n", ret); 910 911 ret = lan9303_enable_processing_port(chip, 0); 912 if (ret) 913 dev_err(chip->dev, "failed to re-enable switching %d\n", ret); 914 915 /* Trap IGMP to port 0 */ 916 ret = lan9303_write_switch_reg_mask(chip, LAN9303_SWE_GLB_INGRESS_CFG, 917 LAN9303_SWE_GLB_INGR_IGMP_TRAP | 918 LAN9303_SWE_GLB_INGR_IGMP_PORT(0), 919 LAN9303_SWE_GLB_INGR_IGMP_PORT(1) | 920 LAN9303_SWE_GLB_INGR_IGMP_PORT(2)); 921 if (ret) 922 dev_err(chip->dev, "failed to setup IGMP trap %d\n", ret); 923 924 return 0; 925 } 926 927 struct lan9303_mib_desc { 928 unsigned int offset; /* offset of first MAC */ 929 const char *name; 930 }; 931 932 static const struct lan9303_mib_desc lan9303_mib[] = { 933 { .offset = LAN9303_MAC_RX_BRDCST_CNT_0, .name = "RxBroad", }, 934 { .offset = LAN9303_MAC_RX_PAUSE_CNT_0, .name = "RxPause", }, 935 { .offset = LAN9303_MAC_RX_MULCST_CNT_0, .name = "RxMulti", }, 936 { .offset = LAN9303_MAC_RX_PKTOK_CNT_0, .name = "RxOk", }, 937 { .offset = LAN9303_MAC_RX_CRCERR_CNT_0, .name = "RxCrcErr", }, 938 { .offset = LAN9303_MAC_RX_ALIGN_CNT_0, .name = "RxAlignErr", }, 939 { .offset = LAN9303_MAC_RX_JABB_CNT_0, .name = "RxJabber", }, 940 { .offset = LAN9303_MAC_RX_FRAG_CNT_0, .name = "RxFragment", }, 941 { .offset = LAN9303_MAC_RX_64_CNT_0, .name = "Rx64Byte", }, 942 { .offset = LAN9303_MAC_RX_127_CNT_0, .name = "Rx128Byte", }, 943 { .offset = LAN9303_MAC_RX_255_CNT_0, .name = "Rx256Byte", }, 944 { .offset = LAN9303_MAC_RX_511_CNT_0, .name = "Rx512Byte", }, 945 { .offset = LAN9303_MAC_RX_1023_CNT_0, .name = "Rx1024Byte", }, 946 { .offset = LAN9303_MAC_RX_MAX_CNT_0, .name = "RxMaxByte", }, 947 { .offset = LAN9303_MAC_RX_PKTLEN_CNT_0, .name = "RxByteCnt", }, 948 { .offset = LAN9303_MAC_RX_SYMBL_CNT_0, .name = "RxSymbolCnt", }, 949 { .offset = LAN9303_MAC_RX_CTLFRM_CNT_0, .name = "RxCfs", }, 950 { .offset = LAN9303_MAC_RX_OVRSZE_CNT_0, .name = "RxOverFlow", }, 951 { .offset = LAN9303_MAC_TX_UNDSZE_CNT_0, .name = "TxShort", }, 952 { .offset = LAN9303_MAC_TX_BRDCST_CNT_0, .name = "TxBroad", }, 953 { .offset = LAN9303_MAC_TX_PAUSE_CNT_0, .name = "TxPause", }, 954 { .offset = LAN9303_MAC_TX_MULCST_CNT_0, .name = "TxMulti", }, 955 { .offset = LAN9303_MAC_RX_UNDSZE_CNT_0, .name = "TxUnderRun", }, 956 { .offset = LAN9303_MAC_TX_64_CNT_0, .name = "Tx64Byte", }, 957 { .offset = LAN9303_MAC_TX_127_CNT_0, .name = "Tx128Byte", }, 958 { .offset = LAN9303_MAC_TX_255_CNT_0, .name = "Tx256Byte", }, 959 { .offset = LAN9303_MAC_TX_511_CNT_0, .name = "Tx512Byte", }, 960 { .offset = LAN9303_MAC_TX_1023_CNT_0, .name = "Tx1024Byte", }, 961 { .offset = LAN9303_MAC_TX_MAX_CNT_0, .name = "TxMaxByte", }, 962 { .offset = LAN9303_MAC_TX_PKTLEN_CNT_0, .name = "TxByteCnt", }, 963 { .offset = LAN9303_MAC_TX_PKTOK_CNT_0, .name = "TxOk", }, 964 { .offset = LAN9303_MAC_TX_TOTALCOL_CNT_0, .name = "TxCollision", }, 965 { .offset = LAN9303_MAC_TX_MULTICOL_CNT_0, .name = "TxMultiCol", }, 966 { .offset = LAN9303_MAC_TX_SNGLECOL_CNT_0, .name = "TxSingleCol", }, 967 { .offset = LAN9303_MAC_TX_EXCOL_CNT_0, .name = "TxExcCol", }, 968 { .offset = LAN9303_MAC_TX_DEFER_CNT_0, .name = "TxDefer", }, 969 { .offset = LAN9303_MAC_TX_LATECOL_0, .name = "TxLateCol", }, 970 }; 971 972 static void lan9303_get_strings(struct dsa_switch *ds, int port, 973 u32 stringset, uint8_t *data) 974 { 975 unsigned int u; 976 977 if (stringset != ETH_SS_STATS) 978 return; 979 980 for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) { 981 strncpy(data + u * ETH_GSTRING_LEN, lan9303_mib[u].name, 982 ETH_GSTRING_LEN); 983 } 984 } 985 986 static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port, 987 uint64_t *data) 988 { 989 struct lan9303 *chip = ds->priv; 990 unsigned int u; 991 992 for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) { 993 u32 reg; 994 int ret; 995 996 ret = lan9303_read_switch_port( 997 chip, port, lan9303_mib[u].offset, ®); 998 999 if (ret) 1000 dev_warn(chip->dev, "Reading status port %d reg %u failed\n", 1001 port, lan9303_mib[u].offset); 1002 data[u] = reg; 1003 } 1004 } 1005 1006 static int lan9303_get_sset_count(struct dsa_switch *ds, int port, int sset) 1007 { 1008 if (sset != ETH_SS_STATS) 1009 return 0; 1010 1011 return ARRAY_SIZE(lan9303_mib); 1012 } 1013 1014 static int lan9303_phy_read(struct dsa_switch *ds, int phy, int regnum) 1015 { 1016 struct lan9303 *chip = ds->priv; 1017 int phy_base = chip->phy_addr_base; 1018 1019 if (phy == phy_base) 1020 return lan9303_virt_phy_reg_read(chip, regnum); 1021 if (phy > phy_base + 2) 1022 return -ENODEV; 1023 1024 return chip->ops->phy_read(chip, phy, regnum); 1025 } 1026 1027 static int lan9303_phy_write(struct dsa_switch *ds, int phy, int regnum, 1028 u16 val) 1029 { 1030 struct lan9303 *chip = ds->priv; 1031 int phy_base = chip->phy_addr_base; 1032 1033 if (phy == phy_base) 1034 return lan9303_virt_phy_reg_write(chip, regnum, val); 1035 if (phy > phy_base + 2) 1036 return -ENODEV; 1037 1038 return chip->ops->phy_write(chip, phy, regnum, val); 1039 } 1040 1041 static void lan9303_adjust_link(struct dsa_switch *ds, int port, 1042 struct phy_device *phydev) 1043 { 1044 struct lan9303 *chip = ds->priv; 1045 int ctl; 1046 1047 if (!phy_is_pseudo_fixed_link(phydev)) 1048 return; 1049 1050 ctl = lan9303_phy_read(ds, port, MII_BMCR); 1051 1052 ctl &= ~BMCR_ANENABLE; 1053 1054 if (phydev->speed == SPEED_100) 1055 ctl |= BMCR_SPEED100; 1056 else if (phydev->speed == SPEED_10) 1057 ctl &= ~BMCR_SPEED100; 1058 else 1059 dev_err(ds->dev, "unsupported speed: %d\n", phydev->speed); 1060 1061 if (phydev->duplex == DUPLEX_FULL) 1062 ctl |= BMCR_FULLDPLX; 1063 else 1064 ctl &= ~BMCR_FULLDPLX; 1065 1066 lan9303_phy_write(ds, port, MII_BMCR, ctl); 1067 1068 if (port == chip->phy_addr_base) { 1069 /* Virtual Phy: Remove Turbo 200Mbit mode */ 1070 lan9303_read(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, &ctl); 1071 1072 ctl &= ~LAN9303_VIRT_SPECIAL_TURBO; 1073 regmap_write(chip->regmap, LAN9303_VIRT_SPECIAL_CTRL, ctl); 1074 } 1075 } 1076 1077 static int lan9303_port_enable(struct dsa_switch *ds, int port, 1078 struct phy_device *phy) 1079 { 1080 struct lan9303 *chip = ds->priv; 1081 1082 if (!dsa_is_user_port(ds, port)) 1083 return 0; 1084 1085 return lan9303_enable_processing_port(chip, port); 1086 } 1087 1088 static void lan9303_port_disable(struct dsa_switch *ds, int port) 1089 { 1090 struct lan9303 *chip = ds->priv; 1091 1092 if (!dsa_is_user_port(ds, port)) 1093 return; 1094 1095 lan9303_disable_processing_port(chip, port); 1096 lan9303_phy_write(ds, chip->phy_addr_base + port, MII_BMCR, BMCR_PDOWN); 1097 } 1098 1099 static int lan9303_port_bridge_join(struct dsa_switch *ds, int port, 1100 struct net_device *br) 1101 { 1102 struct lan9303 *chip = ds->priv; 1103 1104 dev_dbg(chip->dev, "%s(port %d)\n", __func__, port); 1105 if (dsa_to_port(ds, 1)->bridge_dev == dsa_to_port(ds, 2)->bridge_dev) { 1106 lan9303_bridge_ports(chip); 1107 chip->is_bridged = true; /* unleash stp_state_set() */ 1108 } 1109 1110 return 0; 1111 } 1112 1113 static void lan9303_port_bridge_leave(struct dsa_switch *ds, int port, 1114 struct net_device *br) 1115 { 1116 struct lan9303 *chip = ds->priv; 1117 1118 dev_dbg(chip->dev, "%s(port %d)\n", __func__, port); 1119 if (chip->is_bridged) { 1120 lan9303_separate_ports(chip); 1121 chip->is_bridged = false; 1122 } 1123 } 1124 1125 static void lan9303_port_stp_state_set(struct dsa_switch *ds, int port, 1126 u8 state) 1127 { 1128 int portmask, portstate; 1129 struct lan9303 *chip = ds->priv; 1130 1131 dev_dbg(chip->dev, "%s(port %d, state %d)\n", 1132 __func__, port, state); 1133 1134 switch (state) { 1135 case BR_STATE_DISABLED: 1136 portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0; 1137 break; 1138 case BR_STATE_BLOCKING: 1139 case BR_STATE_LISTENING: 1140 portstate = LAN9303_SWE_PORT_STATE_BLOCKING_PORT0; 1141 break; 1142 case BR_STATE_LEARNING: 1143 portstate = LAN9303_SWE_PORT_STATE_LEARNING_PORT0; 1144 break; 1145 case BR_STATE_FORWARDING: 1146 portstate = LAN9303_SWE_PORT_STATE_FORWARDING_PORT0; 1147 break; 1148 default: 1149 portstate = LAN9303_SWE_PORT_STATE_DISABLED_PORT0; 1150 dev_err(chip->dev, "unknown stp state: port %d, state %d\n", 1151 port, state); 1152 } 1153 1154 portmask = 0x3 << (port * 2); 1155 portstate <<= (port * 2); 1156 1157 chip->swe_port_state = (chip->swe_port_state & ~portmask) | portstate; 1158 1159 if (chip->is_bridged) 1160 lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE, 1161 chip->swe_port_state); 1162 /* else: touching SWE_PORT_STATE would break port separation */ 1163 } 1164 1165 static void lan9303_port_fast_age(struct dsa_switch *ds, int port) 1166 { 1167 struct lan9303 *chip = ds->priv; 1168 struct del_port_learned_ctx del_ctx = { 1169 .port = port, 1170 }; 1171 1172 dev_dbg(chip->dev, "%s(%d)\n", __func__, port); 1173 lan9303_alr_loop(chip, alr_loop_cb_del_port_learned, &del_ctx); 1174 } 1175 1176 static int lan9303_port_fdb_add(struct dsa_switch *ds, int port, 1177 const unsigned char *addr, u16 vid) 1178 { 1179 struct lan9303 *chip = ds->priv; 1180 1181 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid); 1182 if (vid) 1183 return -EOPNOTSUPP; 1184 1185 return lan9303_alr_add_port(chip, addr, port, false); 1186 } 1187 1188 static int lan9303_port_fdb_del(struct dsa_switch *ds, int port, 1189 const unsigned char *addr, u16 vid) 1190 1191 { 1192 struct lan9303 *chip = ds->priv; 1193 1194 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid); 1195 if (vid) 1196 return -EOPNOTSUPP; 1197 lan9303_alr_del_port(chip, addr, port); 1198 1199 return 0; 1200 } 1201 1202 static int lan9303_port_fdb_dump(struct dsa_switch *ds, int port, 1203 dsa_fdb_dump_cb_t *cb, void *data) 1204 { 1205 struct lan9303 *chip = ds->priv; 1206 struct port_fdb_dump_ctx dump_ctx = { 1207 .port = port, 1208 .data = data, 1209 .cb = cb, 1210 }; 1211 1212 dev_dbg(chip->dev, "%s(%d)\n", __func__, port); 1213 lan9303_alr_loop(chip, alr_loop_cb_fdb_port_dump, &dump_ctx); 1214 1215 return 0; 1216 } 1217 1218 static int lan9303_port_mdb_prepare(struct dsa_switch *ds, int port, 1219 const struct switchdev_obj_port_mdb *mdb) 1220 { 1221 struct lan9303 *chip = ds->priv; 1222 1223 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr, 1224 mdb->vid); 1225 if (mdb->vid) 1226 return -EOPNOTSUPP; 1227 if (lan9303_alr_cache_find_mac(chip, mdb->addr)) 1228 return 0; 1229 if (!lan9303_alr_cache_find_free(chip)) 1230 return -ENOSPC; 1231 1232 return 0; 1233 } 1234 1235 static int lan9303_port_mdb_add(struct dsa_switch *ds, int port, 1236 const struct switchdev_obj_port_mdb *mdb) 1237 { 1238 struct lan9303 *chip = ds->priv; 1239 int err; 1240 1241 err = lan9303_port_mdb_prepare(ds, port, mdb); 1242 if (err) 1243 return err; 1244 1245 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr, 1246 mdb->vid); 1247 return lan9303_alr_add_port(chip, mdb->addr, port, false); 1248 } 1249 1250 static int lan9303_port_mdb_del(struct dsa_switch *ds, int port, 1251 const struct switchdev_obj_port_mdb *mdb) 1252 { 1253 struct lan9303 *chip = ds->priv; 1254 1255 dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, mdb->addr, 1256 mdb->vid); 1257 if (mdb->vid) 1258 return -EOPNOTSUPP; 1259 lan9303_alr_del_port(chip, mdb->addr, port); 1260 1261 return 0; 1262 } 1263 1264 static const struct dsa_switch_ops lan9303_switch_ops = { 1265 .get_tag_protocol = lan9303_get_tag_protocol, 1266 .setup = lan9303_setup, 1267 .get_strings = lan9303_get_strings, 1268 .phy_read = lan9303_phy_read, 1269 .phy_write = lan9303_phy_write, 1270 .adjust_link = lan9303_adjust_link, 1271 .get_ethtool_stats = lan9303_get_ethtool_stats, 1272 .get_sset_count = lan9303_get_sset_count, 1273 .port_enable = lan9303_port_enable, 1274 .port_disable = lan9303_port_disable, 1275 .port_bridge_join = lan9303_port_bridge_join, 1276 .port_bridge_leave = lan9303_port_bridge_leave, 1277 .port_stp_state_set = lan9303_port_stp_state_set, 1278 .port_fast_age = lan9303_port_fast_age, 1279 .port_fdb_add = lan9303_port_fdb_add, 1280 .port_fdb_del = lan9303_port_fdb_del, 1281 .port_fdb_dump = lan9303_port_fdb_dump, 1282 .port_mdb_add = lan9303_port_mdb_add, 1283 .port_mdb_del = lan9303_port_mdb_del, 1284 }; 1285 1286 static int lan9303_register_switch(struct lan9303 *chip) 1287 { 1288 int base; 1289 1290 chip->ds = devm_kzalloc(chip->dev, sizeof(*chip->ds), GFP_KERNEL); 1291 if (!chip->ds) 1292 return -ENOMEM; 1293 1294 chip->ds->dev = chip->dev; 1295 chip->ds->num_ports = LAN9303_NUM_PORTS; 1296 chip->ds->priv = chip; 1297 chip->ds->ops = &lan9303_switch_ops; 1298 base = chip->phy_addr_base; 1299 chip->ds->phys_mii_mask = GENMASK(LAN9303_NUM_PORTS - 1 + base, base); 1300 1301 return dsa_register_switch(chip->ds); 1302 } 1303 1304 static int lan9303_probe_reset_gpio(struct lan9303 *chip, 1305 struct device_node *np) 1306 { 1307 chip->reset_gpio = devm_gpiod_get_optional(chip->dev, "reset", 1308 GPIOD_OUT_LOW); 1309 if (IS_ERR(chip->reset_gpio)) 1310 return PTR_ERR(chip->reset_gpio); 1311 1312 if (!chip->reset_gpio) { 1313 dev_dbg(chip->dev, "No reset GPIO defined\n"); 1314 return 0; 1315 } 1316 1317 chip->reset_duration = 200; 1318 1319 if (np) { 1320 of_property_read_u32(np, "reset-duration", 1321 &chip->reset_duration); 1322 } else { 1323 dev_dbg(chip->dev, "reset duration defaults to 200 ms\n"); 1324 } 1325 1326 /* A sane reset duration should not be longer than 1s */ 1327 if (chip->reset_duration > 1000) 1328 chip->reset_duration = 1000; 1329 1330 return 0; 1331 } 1332 1333 int lan9303_probe(struct lan9303 *chip, struct device_node *np) 1334 { 1335 int ret; 1336 1337 mutex_init(&chip->indirect_mutex); 1338 mutex_init(&chip->alr_mutex); 1339 1340 ret = lan9303_probe_reset_gpio(chip, np); 1341 if (ret) 1342 return ret; 1343 1344 lan9303_handle_reset(chip); 1345 1346 ret = lan9303_check_device(chip); 1347 if (ret) 1348 return ret; 1349 1350 ret = lan9303_register_switch(chip); 1351 if (ret) { 1352 dev_dbg(chip->dev, "Failed to register switch: %d\n", ret); 1353 return ret; 1354 } 1355 1356 return 0; 1357 } 1358 EXPORT_SYMBOL(lan9303_probe); 1359 1360 int lan9303_remove(struct lan9303 *chip) 1361 { 1362 int rc; 1363 1364 rc = lan9303_disable_processing(chip); 1365 if (rc != 0) 1366 dev_warn(chip->dev, "shutting down failed\n"); 1367 1368 dsa_unregister_switch(chip->ds); 1369 1370 /* assert reset to the whole device to prevent it from doing anything */ 1371 gpiod_set_value_cansleep(chip->reset_gpio, 1); 1372 gpiod_unexport(chip->reset_gpio); 1373 1374 return 0; 1375 } 1376 EXPORT_SYMBOL(lan9303_remove); 1377 1378 MODULE_AUTHOR("Juergen Borleis <kernel@pengutronix.de>"); 1379 MODULE_DESCRIPTION("Core driver for SMSC/Microchip LAN9303 three port ethernet switch"); 1380 MODULE_LICENSE("GPL v2"); 1381