1 // SPDX-License-Identifier: GPL-2.0 2 /* DSA driver for: 3 * Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch 4 * Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch 5 * Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch 6 * Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch 7 * 8 * These switches have a built-in 8051 CPU and can download and execute a 9 * firmware in this CPU. They can also be configured to use an external CPU 10 * handling the switch in a memory-mapped manner by connecting to that external 11 * CPU's memory bus. 12 * 13 * Copyright (C) 2018 Linus Wallej <linus.walleij@linaro.org> 14 * Includes portions of code from the firmware uploader by: 15 * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> 16 */ 17 #include <linux/kernel.h> 18 #include <linux/module.h> 19 #include <linux/device.h> 20 #include <linux/of.h> 21 #include <linux/of_device.h> 22 #include <linux/of_mdio.h> 23 #include <linux/bitops.h> 24 #include <linux/if_bridge.h> 25 #include <linux/etherdevice.h> 26 #include <linux/gpio/consumer.h> 27 #include <linux/gpio/driver.h> 28 #include <linux/random.h> 29 #include <net/dsa.h> 30 31 #include "vitesse-vsc73xx.h" 32 33 #define VSC73XX_BLOCK_MAC 0x1 /* Subblocks 0-4, 6 (CPU port) */ 34 #define VSC73XX_BLOCK_ANALYZER 0x2 /* Only subblock 0 */ 35 #define VSC73XX_BLOCK_MII 0x3 /* Subblocks 0 and 1 */ 36 #define VSC73XX_BLOCK_MEMINIT 0x3 /* Only subblock 2 */ 37 #define VSC73XX_BLOCK_CAPTURE 0x4 /* Only subblock 2 */ 38 #define VSC73XX_BLOCK_ARBITER 0x5 /* Only subblock 0 */ 39 #define VSC73XX_BLOCK_SYSTEM 0x7 /* Only subblock 0 */ 40 41 #define CPU_PORT 6 /* CPU port */ 42 43 /* MAC Block registers */ 44 #define VSC73XX_MAC_CFG 0x00 45 #define VSC73XX_MACHDXGAP 0x02 46 #define VSC73XX_FCCONF 0x04 47 #define VSC73XX_FCMACHI 0x08 48 #define VSC73XX_FCMACLO 0x0c 49 #define VSC73XX_MAXLEN 0x10 50 #define VSC73XX_ADVPORTM 0x19 51 #define VSC73XX_TXUPDCFG 0x24 52 #define VSC73XX_TXQ_SELECT_CFG 0x28 53 #define VSC73XX_RXOCT 0x50 54 #define VSC73XX_TXOCT 0x51 55 #define VSC73XX_C_RX0 0x52 56 #define VSC73XX_C_RX1 0x53 57 #define VSC73XX_C_RX2 0x54 58 #define VSC73XX_C_TX0 0x55 59 #define VSC73XX_C_TX1 0x56 60 #define VSC73XX_C_TX2 0x57 61 #define VSC73XX_C_CFG 0x58 62 #define VSC73XX_CAT_DROP 0x6e 63 #define VSC73XX_CAT_PR_MISC_L2 0x6f 64 #define VSC73XX_CAT_PR_USR_PRIO 0x75 65 #define VSC73XX_Q_MISC_CONF 0xdf 66 67 /* MAC_CFG register bits */ 68 #define VSC73XX_MAC_CFG_WEXC_DIS BIT(31) 69 #define VSC73XX_MAC_CFG_PORT_RST BIT(29) 70 #define VSC73XX_MAC_CFG_TX_EN BIT(28) 71 #define VSC73XX_MAC_CFG_SEED_LOAD BIT(27) 72 #define VSC73XX_MAC_CFG_SEED_MASK GENMASK(26, 19) 73 #define VSC73XX_MAC_CFG_SEED_OFFSET 19 74 #define VSC73XX_MAC_CFG_FDX BIT(18) 75 #define VSC73XX_MAC_CFG_GIGA_MODE BIT(17) 76 #define VSC73XX_MAC_CFG_RX_EN BIT(16) 77 #define VSC73XX_MAC_CFG_VLAN_DBLAWR BIT(15) 78 #define VSC73XX_MAC_CFG_VLAN_AWR BIT(14) 79 #define VSC73XX_MAC_CFG_100_BASE_T BIT(13) /* Not in manual */ 80 #define VSC73XX_MAC_CFG_TX_IPG_MASK GENMASK(10, 6) 81 #define VSC73XX_MAC_CFG_TX_IPG_OFFSET 6 82 #define VSC73XX_MAC_CFG_TX_IPG_1000M (6 << VSC73XX_MAC_CFG_TX_IPG_OFFSET) 83 #define VSC73XX_MAC_CFG_TX_IPG_100_10M (17 << VSC73XX_MAC_CFG_TX_IPG_OFFSET) 84 #define VSC73XX_MAC_CFG_MAC_RX_RST BIT(5) 85 #define VSC73XX_MAC_CFG_MAC_TX_RST BIT(4) 86 #define VSC73XX_MAC_CFG_CLK_SEL_MASK GENMASK(2, 0) 87 #define VSC73XX_MAC_CFG_CLK_SEL_OFFSET 0 88 #define VSC73XX_MAC_CFG_CLK_SEL_1000M 1 89 #define VSC73XX_MAC_CFG_CLK_SEL_100M 2 90 #define VSC73XX_MAC_CFG_CLK_SEL_10M 3 91 #define VSC73XX_MAC_CFG_CLK_SEL_EXT 4 92 93 #define VSC73XX_MAC_CFG_1000M_F_PHY (VSC73XX_MAC_CFG_FDX | \ 94 VSC73XX_MAC_CFG_GIGA_MODE | \ 95 VSC73XX_MAC_CFG_TX_IPG_1000M | \ 96 VSC73XX_MAC_CFG_CLK_SEL_EXT) 97 #define VSC73XX_MAC_CFG_100_10M_F_PHY (VSC73XX_MAC_CFG_FDX | \ 98 VSC73XX_MAC_CFG_TX_IPG_100_10M | \ 99 VSC73XX_MAC_CFG_CLK_SEL_EXT) 100 #define VSC73XX_MAC_CFG_100_10M_H_PHY (VSC73XX_MAC_CFG_TX_IPG_100_10M | \ 101 VSC73XX_MAC_CFG_CLK_SEL_EXT) 102 #define VSC73XX_MAC_CFG_1000M_F_RGMII (VSC73XX_MAC_CFG_FDX | \ 103 VSC73XX_MAC_CFG_GIGA_MODE | \ 104 VSC73XX_MAC_CFG_TX_IPG_1000M | \ 105 VSC73XX_MAC_CFG_CLK_SEL_1000M) 106 #define VSC73XX_MAC_CFG_RESET (VSC73XX_MAC_CFG_PORT_RST | \ 107 VSC73XX_MAC_CFG_MAC_RX_RST | \ 108 VSC73XX_MAC_CFG_MAC_TX_RST) 109 110 /* Flow control register bits */ 111 #define VSC73XX_FCCONF_ZERO_PAUSE_EN BIT(17) 112 #define VSC73XX_FCCONF_FLOW_CTRL_OBEY BIT(16) 113 #define VSC73XX_FCCONF_PAUSE_VAL_MASK GENMASK(15, 0) 114 115 /* ADVPORTM advanced port setup register bits */ 116 #define VSC73XX_ADVPORTM_IFG_PPM BIT(7) 117 #define VSC73XX_ADVPORTM_EXC_COL_CONT BIT(6) 118 #define VSC73XX_ADVPORTM_EXT_PORT BIT(5) 119 #define VSC73XX_ADVPORTM_INV_GTX BIT(4) 120 #define VSC73XX_ADVPORTM_ENA_GTX BIT(3) 121 #define VSC73XX_ADVPORTM_DDR_MODE BIT(2) 122 #define VSC73XX_ADVPORTM_IO_LOOPBACK BIT(1) 123 #define VSC73XX_ADVPORTM_HOST_LOOPBACK BIT(0) 124 125 /* CAT_DROP categorizer frame dropping register bits */ 126 #define VSC73XX_CAT_DROP_DROP_MC_SMAC_ENA BIT(6) 127 #define VSC73XX_CAT_DROP_FWD_CTRL_ENA BIT(4) 128 #define VSC73XX_CAT_DROP_FWD_PAUSE_ENA BIT(3) 129 #define VSC73XX_CAT_DROP_UNTAGGED_ENA BIT(2) 130 #define VSC73XX_CAT_DROP_TAGGED_ENA BIT(1) 131 #define VSC73XX_CAT_DROP_NULL_MAC_ENA BIT(0) 132 133 #define VSC73XX_Q_MISC_CONF_EXTENT_MEM BIT(31) 134 #define VSC73XX_Q_MISC_CONF_EARLY_TX_MASK GENMASK(4, 1) 135 #define VSC73XX_Q_MISC_CONF_EARLY_TX_512 (1 << 1) 136 #define VSC73XX_Q_MISC_CONF_MAC_PAUSE_MODE BIT(0) 137 138 /* Frame analyzer block 2 registers */ 139 #define VSC73XX_STORMLIMIT 0x02 140 #define VSC73XX_ADVLEARN 0x03 141 #define VSC73XX_IFLODMSK 0x04 142 #define VSC73XX_VLANMASK 0x05 143 #define VSC73XX_MACHDATA 0x06 144 #define VSC73XX_MACLDATA 0x07 145 #define VSC73XX_ANMOVED 0x08 146 #define VSC73XX_ANAGEFIL 0x09 147 #define VSC73XX_ANEVENTS 0x0a 148 #define VSC73XX_ANCNTMASK 0x0b 149 #define VSC73XX_ANCNTVAL 0x0c 150 #define VSC73XX_LEARNMASK 0x0d 151 #define VSC73XX_UFLODMASK 0x0e 152 #define VSC73XX_MFLODMASK 0x0f 153 #define VSC73XX_RECVMASK 0x10 154 #define VSC73XX_AGGRCTRL 0x20 155 #define VSC73XX_AGGRMSKS 0x30 /* Until 0x3f */ 156 #define VSC73XX_DSTMASKS 0x40 /* Until 0x7f */ 157 #define VSC73XX_SRCMASKS 0x80 /* Until 0x87 */ 158 #define VSC73XX_CAPENAB 0xa0 159 #define VSC73XX_MACACCESS 0xb0 160 #define VSC73XX_IPMCACCESS 0xb1 161 #define VSC73XX_MACTINDX 0xc0 162 #define VSC73XX_VLANACCESS 0xd0 163 #define VSC73XX_VLANTIDX 0xe0 164 #define VSC73XX_AGENCTRL 0xf0 165 #define VSC73XX_CAPRST 0xff 166 167 #define VSC73XX_MACACCESS_CPU_COPY BIT(14) 168 #define VSC73XX_MACACCESS_FWD_KILL BIT(13) 169 #define VSC73XX_MACACCESS_IGNORE_VLAN BIT(12) 170 #define VSC73XX_MACACCESS_AGED_FLAG BIT(11) 171 #define VSC73XX_MACACCESS_VALID BIT(10) 172 #define VSC73XX_MACACCESS_LOCKED BIT(9) 173 #define VSC73XX_MACACCESS_DEST_IDX_MASK GENMASK(8, 3) 174 #define VSC73XX_MACACCESS_CMD_MASK GENMASK(2, 0) 175 #define VSC73XX_MACACCESS_CMD_IDLE 0 176 #define VSC73XX_MACACCESS_CMD_LEARN 1 177 #define VSC73XX_MACACCESS_CMD_FORGET 2 178 #define VSC73XX_MACACCESS_CMD_AGE_TABLE 3 179 #define VSC73XX_MACACCESS_CMD_FLUSH_TABLE 4 180 #define VSC73XX_MACACCESS_CMD_CLEAR_TABLE 5 181 #define VSC73XX_MACACCESS_CMD_READ_ENTRY 6 182 #define VSC73XX_MACACCESS_CMD_WRITE_ENTRY 7 183 184 #define VSC73XX_VLANACCESS_LEARN_DISABLED BIT(30) 185 #define VSC73XX_VLANACCESS_VLAN_MIRROR BIT(29) 186 #define VSC73XX_VLANACCESS_VLAN_SRC_CHECK BIT(28) 187 #define VSC73XX_VLANACCESS_VLAN_PORT_MASK GENMASK(9, 2) 188 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_MASK GENMASK(2, 0) 189 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_IDLE 0 190 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_READ_ENTRY 1 191 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_WRITE_ENTRY 2 192 #define VSC73XX_VLANACCESS_VLAN_TBL_CMD_CLEAR_TABLE 3 193 194 /* MII block 3 registers */ 195 #define VSC73XX_MII_STAT 0x0 196 #define VSC73XX_MII_CMD 0x1 197 #define VSC73XX_MII_DATA 0x2 198 199 /* Arbiter block 5 registers */ 200 #define VSC73XX_ARBEMPTY 0x0c 201 #define VSC73XX_ARBDISC 0x0e 202 #define VSC73XX_SBACKWDROP 0x12 203 #define VSC73XX_DBACKWDROP 0x13 204 #define VSC73XX_ARBBURSTPROB 0x15 205 206 /* System block 7 registers */ 207 #define VSC73XX_ICPU_SIPAD 0x01 208 #define VSC73XX_GMIIDELAY 0x05 209 #define VSC73XX_ICPU_CTRL 0x10 210 #define VSC73XX_ICPU_ADDR 0x11 211 #define VSC73XX_ICPU_SRAM 0x12 212 #define VSC73XX_HWSEM 0x13 213 #define VSC73XX_GLORESET 0x14 214 #define VSC73XX_ICPU_MBOX_VAL 0x15 215 #define VSC73XX_ICPU_MBOX_SET 0x16 216 #define VSC73XX_ICPU_MBOX_CLR 0x17 217 #define VSC73XX_CHIPID 0x18 218 #define VSC73XX_GPIO 0x34 219 220 #define VSC73XX_GMIIDELAY_GMII0_GTXDELAY_NONE 0 221 #define VSC73XX_GMIIDELAY_GMII0_GTXDELAY_1_4_NS 1 222 #define VSC73XX_GMIIDELAY_GMII0_GTXDELAY_1_7_NS 2 223 #define VSC73XX_GMIIDELAY_GMII0_GTXDELAY_2_0_NS 3 224 225 #define VSC73XX_GMIIDELAY_GMII0_RXDELAY_NONE (0 << 4) 226 #define VSC73XX_GMIIDELAY_GMII0_RXDELAY_1_4_NS (1 << 4) 227 #define VSC73XX_GMIIDELAY_GMII0_RXDELAY_1_7_NS (2 << 4) 228 #define VSC73XX_GMIIDELAY_GMII0_RXDELAY_2_0_NS (3 << 4) 229 230 #define VSC73XX_ICPU_CTRL_WATCHDOG_RST BIT(31) 231 #define VSC73XX_ICPU_CTRL_CLK_DIV_MASK GENMASK(12, 8) 232 #define VSC73XX_ICPU_CTRL_SRST_HOLD BIT(7) 233 #define VSC73XX_ICPU_CTRL_ICPU_PI_EN BIT(6) 234 #define VSC73XX_ICPU_CTRL_BOOT_EN BIT(3) 235 #define VSC73XX_ICPU_CTRL_EXT_ACC_EN BIT(2) 236 #define VSC73XX_ICPU_CTRL_CLK_EN BIT(1) 237 #define VSC73XX_ICPU_CTRL_SRST BIT(0) 238 239 #define VSC73XX_CHIPID_ID_SHIFT 12 240 #define VSC73XX_CHIPID_ID_MASK 0xffff 241 #define VSC73XX_CHIPID_REV_SHIFT 28 242 #define VSC73XX_CHIPID_REV_MASK 0xf 243 #define VSC73XX_CHIPID_ID_7385 0x7385 244 #define VSC73XX_CHIPID_ID_7388 0x7388 245 #define VSC73XX_CHIPID_ID_7395 0x7395 246 #define VSC73XX_CHIPID_ID_7398 0x7398 247 248 #define VSC73XX_GLORESET_STROBE BIT(4) 249 #define VSC73XX_GLORESET_ICPU_LOCK BIT(3) 250 #define VSC73XX_GLORESET_MEM_LOCK BIT(2) 251 #define VSC73XX_GLORESET_PHY_RESET BIT(1) 252 #define VSC73XX_GLORESET_MASTER_RESET BIT(0) 253 254 #define VSC7385_CLOCK_DELAY ((3 << 4) | 3) 255 #define VSC7385_CLOCK_DELAY_MASK ((3 << 4) | 3) 256 257 #define VSC73XX_ICPU_CTRL_STOP (VSC73XX_ICPU_CTRL_SRST_HOLD | \ 258 VSC73XX_ICPU_CTRL_BOOT_EN | \ 259 VSC73XX_ICPU_CTRL_EXT_ACC_EN) 260 261 #define VSC73XX_ICPU_CTRL_START (VSC73XX_ICPU_CTRL_CLK_DIV | \ 262 VSC73XX_ICPU_CTRL_BOOT_EN | \ 263 VSC73XX_ICPU_CTRL_CLK_EN | \ 264 VSC73XX_ICPU_CTRL_SRST) 265 266 #define IS_7385(a) ((a)->chipid == VSC73XX_CHIPID_ID_7385) 267 #define IS_7388(a) ((a)->chipid == VSC73XX_CHIPID_ID_7388) 268 #define IS_7395(a) ((a)->chipid == VSC73XX_CHIPID_ID_7395) 269 #define IS_7398(a) ((a)->chipid == VSC73XX_CHIPID_ID_7398) 270 #define IS_739X(a) (IS_7395(a) || IS_7398(a)) 271 272 struct vsc73xx_counter { 273 u8 counter; 274 const char *name; 275 }; 276 277 /* Counters are named according to the MIB standards where applicable. 278 * Some counters are custom, non-standard. The standard counters are 279 * named in accordance with RFC2819, RFC2021 and IEEE Std 802.3-2002 Annex 280 * 30A Counters. 281 */ 282 static const struct vsc73xx_counter vsc73xx_rx_counters[] = { 283 { 0, "RxEtherStatsPkts" }, 284 { 1, "RxBroadcast+MulticastPkts" }, /* non-standard counter */ 285 { 2, "RxTotalErrorPackets" }, /* non-standard counter */ 286 { 3, "RxEtherStatsBroadcastPkts" }, 287 { 4, "RxEtherStatsMulticastPkts" }, 288 { 5, "RxEtherStatsPkts64Octets" }, 289 { 6, "RxEtherStatsPkts65to127Octets" }, 290 { 7, "RxEtherStatsPkts128to255Octets" }, 291 { 8, "RxEtherStatsPkts256to511Octets" }, 292 { 9, "RxEtherStatsPkts512to1023Octets" }, 293 { 10, "RxEtherStatsPkts1024to1518Octets" }, 294 { 11, "RxJumboFrames" }, /* non-standard counter */ 295 { 12, "RxaPauseMACControlFramesTransmitted" }, 296 { 13, "RxFIFODrops" }, /* non-standard counter */ 297 { 14, "RxBackwardDrops" }, /* non-standard counter */ 298 { 15, "RxClassifierDrops" }, /* non-standard counter */ 299 { 16, "RxEtherStatsCRCAlignErrors" }, 300 { 17, "RxEtherStatsUndersizePkts" }, 301 { 18, "RxEtherStatsOversizePkts" }, 302 { 19, "RxEtherStatsFragments" }, 303 { 20, "RxEtherStatsJabbers" }, 304 { 21, "RxaMACControlFramesReceived" }, 305 /* 22-24 are undefined */ 306 { 25, "RxaFramesReceivedOK" }, 307 { 26, "RxQoSClass0" }, /* non-standard counter */ 308 { 27, "RxQoSClass1" }, /* non-standard counter */ 309 { 28, "RxQoSClass2" }, /* non-standard counter */ 310 { 29, "RxQoSClass3" }, /* non-standard counter */ 311 }; 312 313 static const struct vsc73xx_counter vsc73xx_tx_counters[] = { 314 { 0, "TxEtherStatsPkts" }, 315 { 1, "TxBroadcast+MulticastPkts" }, /* non-standard counter */ 316 { 2, "TxTotalErrorPackets" }, /* non-standard counter */ 317 { 3, "TxEtherStatsBroadcastPkts" }, 318 { 4, "TxEtherStatsMulticastPkts" }, 319 { 5, "TxEtherStatsPkts64Octets" }, 320 { 6, "TxEtherStatsPkts65to127Octets" }, 321 { 7, "TxEtherStatsPkts128to255Octets" }, 322 { 8, "TxEtherStatsPkts256to511Octets" }, 323 { 9, "TxEtherStatsPkts512to1023Octets" }, 324 { 10, "TxEtherStatsPkts1024to1518Octets" }, 325 { 11, "TxJumboFrames" }, /* non-standard counter */ 326 { 12, "TxaPauseMACControlFramesTransmitted" }, 327 { 13, "TxFIFODrops" }, /* non-standard counter */ 328 { 14, "TxDrops" }, /* non-standard counter */ 329 { 15, "TxEtherStatsCollisions" }, 330 { 16, "TxEtherStatsCRCAlignErrors" }, 331 { 17, "TxEtherStatsUndersizePkts" }, 332 { 18, "TxEtherStatsOversizePkts" }, 333 { 19, "TxEtherStatsFragments" }, 334 { 20, "TxEtherStatsJabbers" }, 335 /* 21-24 are undefined */ 336 { 25, "TxaFramesReceivedOK" }, 337 { 26, "TxQoSClass0" }, /* non-standard counter */ 338 { 27, "TxQoSClass1" }, /* non-standard counter */ 339 { 28, "TxQoSClass2" }, /* non-standard counter */ 340 { 29, "TxQoSClass3" }, /* non-standard counter */ 341 }; 342 343 int vsc73xx_is_addr_valid(u8 block, u8 subblock) 344 { 345 switch (block) { 346 case VSC73XX_BLOCK_MAC: 347 switch (subblock) { 348 case 0 ... 4: 349 case 6: 350 return 1; 351 } 352 break; 353 354 case VSC73XX_BLOCK_ANALYZER: 355 case VSC73XX_BLOCK_SYSTEM: 356 switch (subblock) { 357 case 0: 358 return 1; 359 } 360 break; 361 362 case VSC73XX_BLOCK_MII: 363 case VSC73XX_BLOCK_CAPTURE: 364 case VSC73XX_BLOCK_ARBITER: 365 switch (subblock) { 366 case 0 ... 1: 367 return 1; 368 } 369 break; 370 } 371 372 return 0; 373 } 374 EXPORT_SYMBOL(vsc73xx_is_addr_valid); 375 376 static int vsc73xx_read(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg, 377 u32 *val) 378 { 379 return vsc->ops->read(vsc, block, subblock, reg, val); 380 } 381 382 static int vsc73xx_write(struct vsc73xx *vsc, u8 block, u8 subblock, u8 reg, 383 u32 val) 384 { 385 return vsc->ops->write(vsc, block, subblock, reg, val); 386 } 387 388 static int vsc73xx_update_bits(struct vsc73xx *vsc, u8 block, u8 subblock, 389 u8 reg, u32 mask, u32 val) 390 { 391 u32 tmp, orig; 392 int ret; 393 394 /* Same read-modify-write algorithm as e.g. regmap */ 395 ret = vsc73xx_read(vsc, block, subblock, reg, &orig); 396 if (ret) 397 return ret; 398 tmp = orig & ~mask; 399 tmp |= val & mask; 400 return vsc73xx_write(vsc, block, subblock, reg, tmp); 401 } 402 403 static int vsc73xx_detect(struct vsc73xx *vsc) 404 { 405 bool icpu_si_boot_en; 406 bool icpu_pi_en; 407 u32 val; 408 u32 rev; 409 int ret; 410 u32 id; 411 412 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 413 VSC73XX_ICPU_MBOX_VAL, &val); 414 if (ret) { 415 dev_err(vsc->dev, "unable to read mailbox (%d)\n", ret); 416 return ret; 417 } 418 419 if (val == 0xffffffff) { 420 dev_info(vsc->dev, "chip seems dead.\n"); 421 return -EAGAIN; 422 } 423 424 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 425 VSC73XX_CHIPID, &val); 426 if (ret) { 427 dev_err(vsc->dev, "unable to read chip id (%d)\n", ret); 428 return ret; 429 } 430 431 id = (val >> VSC73XX_CHIPID_ID_SHIFT) & 432 VSC73XX_CHIPID_ID_MASK; 433 switch (id) { 434 case VSC73XX_CHIPID_ID_7385: 435 case VSC73XX_CHIPID_ID_7388: 436 case VSC73XX_CHIPID_ID_7395: 437 case VSC73XX_CHIPID_ID_7398: 438 break; 439 default: 440 dev_err(vsc->dev, "unsupported chip, id=%04x\n", id); 441 return -ENODEV; 442 } 443 444 vsc->chipid = id; 445 rev = (val >> VSC73XX_CHIPID_REV_SHIFT) & 446 VSC73XX_CHIPID_REV_MASK; 447 dev_info(vsc->dev, "VSC%04X (rev: %d) switch found\n", id, rev); 448 449 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 450 VSC73XX_ICPU_CTRL, &val); 451 if (ret) { 452 dev_err(vsc->dev, "unable to read iCPU control\n"); 453 return ret; 454 } 455 456 /* The iCPU can always be used but can boot in different ways. 457 * If it is initially disabled and has no external memory, 458 * we are in control and can do whatever we like, else we 459 * are probably in trouble (we need some way to communicate 460 * with the running firmware) so we bail out for now. 461 */ 462 icpu_pi_en = !!(val & VSC73XX_ICPU_CTRL_ICPU_PI_EN); 463 icpu_si_boot_en = !!(val & VSC73XX_ICPU_CTRL_BOOT_EN); 464 if (icpu_si_boot_en && icpu_pi_en) { 465 dev_err(vsc->dev, 466 "iCPU enabled boots from SI, has external memory\n"); 467 dev_err(vsc->dev, "no idea how to deal with this\n"); 468 return -ENODEV; 469 } 470 if (icpu_si_boot_en && !icpu_pi_en) { 471 dev_err(vsc->dev, 472 "iCPU enabled boots from PI/SI, no external memory\n"); 473 return -EAGAIN; 474 } 475 if (!icpu_si_boot_en && icpu_pi_en) { 476 dev_err(vsc->dev, 477 "iCPU enabled, boots from PI external memory\n"); 478 dev_err(vsc->dev, "no idea how to deal with this\n"); 479 return -ENODEV; 480 } 481 /* !icpu_si_boot_en && !cpu_pi_en */ 482 dev_info(vsc->dev, "iCPU disabled, no external memory\n"); 483 484 return 0; 485 } 486 487 static int vsc73xx_phy_read(struct dsa_switch *ds, int phy, int regnum) 488 { 489 struct vsc73xx *vsc = ds->priv; 490 u32 cmd; 491 u32 val; 492 int ret; 493 494 /* Setting bit 26 means "read" */ 495 cmd = BIT(26) | (phy << 21) | (regnum << 16); 496 ret = vsc73xx_write(vsc, VSC73XX_BLOCK_MII, 0, 1, cmd); 497 if (ret) 498 return ret; 499 msleep(2); 500 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MII, 0, 2, &val); 501 if (ret) 502 return ret; 503 if (val & BIT(16)) { 504 dev_err(vsc->dev, "reading reg %02x from phy%d failed\n", 505 regnum, phy); 506 return -EIO; 507 } 508 val &= 0xFFFFU; 509 510 dev_dbg(vsc->dev, "read reg %02x from phy%d = %04x\n", 511 regnum, phy, val); 512 513 return val; 514 } 515 516 static int vsc73xx_phy_write(struct dsa_switch *ds, int phy, int regnum, 517 u16 val) 518 { 519 struct vsc73xx *vsc = ds->priv; 520 u32 cmd; 521 int ret; 522 523 /* It was found through tedious experiments that this router 524 * chip really hates to have it's PHYs reset. They 525 * never recover if that happens: autonegotiation stops 526 * working after a reset. Just filter out this command. 527 * (Resetting the whole chip is OK.) 528 */ 529 if (regnum == 0 && (val & BIT(15))) { 530 dev_info(vsc->dev, "reset PHY - disallowed\n"); 531 return 0; 532 } 533 534 cmd = (phy << 21) | (regnum << 16); 535 ret = vsc73xx_write(vsc, VSC73XX_BLOCK_MII, 0, 1, cmd); 536 if (ret) 537 return ret; 538 539 dev_dbg(vsc->dev, "write %04x to reg %02x in phy%d\n", 540 val, regnum, phy); 541 return 0; 542 } 543 544 static enum dsa_tag_protocol vsc73xx_get_tag_protocol(struct dsa_switch *ds, 545 int port, 546 enum dsa_tag_protocol mp) 547 { 548 /* The switch internally uses a 8 byte header with length, 549 * source port, tag, LPA and priority. This is supposedly 550 * only accessible when operating the switch using the internal 551 * CPU or with an external CPU mapping the device in, but not 552 * when operating the switch over SPI and putting frames in/out 553 * on port 6 (the CPU port). So far we must assume that we 554 * cannot access the tag. (See "Internal frame header" section 555 * 3.9.1 in the manual.) 556 */ 557 return DSA_TAG_PROTO_NONE; 558 } 559 560 static int vsc73xx_setup(struct dsa_switch *ds) 561 { 562 struct vsc73xx *vsc = ds->priv; 563 int i; 564 565 dev_info(vsc->dev, "set up the switch\n"); 566 567 /* Issue RESET */ 568 vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET, 569 VSC73XX_GLORESET_MASTER_RESET); 570 usleep_range(125, 200); 571 572 /* Initialize memory, initialize RAM bank 0..15 except 6 and 7 573 * This sequence appears in the 574 * VSC7385 SparX-G5 datasheet section 6.6.1 575 * VSC7395 SparX-G5e datasheet section 6.6.1 576 * "initialization sequence". 577 * No explanation is given to the 0x1010400 magic number. 578 */ 579 for (i = 0; i <= 15; i++) { 580 if (i != 6 && i != 7) { 581 vsc73xx_write(vsc, VSC73XX_BLOCK_MEMINIT, 582 2, 583 0, 0x1010400 + i); 584 mdelay(1); 585 } 586 } 587 mdelay(30); 588 589 /* Clear MAC table */ 590 vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, 591 VSC73XX_MACACCESS, 592 VSC73XX_MACACCESS_CMD_CLEAR_TABLE); 593 594 /* Clear VLAN table */ 595 vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, 596 VSC73XX_VLANACCESS, 597 VSC73XX_VLANACCESS_VLAN_TBL_CMD_CLEAR_TABLE); 598 599 msleep(40); 600 601 /* Use 20KiB buffers on all ports on VSC7395 602 * The VSC7385 has 16KiB buffers and that is the 603 * default if we don't set this up explicitly. 604 * Port "31" is "all ports". 605 */ 606 if (IS_739X(vsc)) 607 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 0x1f, 608 VSC73XX_Q_MISC_CONF, 609 VSC73XX_Q_MISC_CONF_EXTENT_MEM); 610 611 /* Put all ports into reset until enabled */ 612 for (i = 0; i < 7; i++) { 613 if (i == 5) 614 continue; 615 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 4, 616 VSC73XX_MAC_CFG, VSC73XX_MAC_CFG_RESET); 617 } 618 619 /* MII delay, set both GTX and RX delay to 2 ns */ 620 vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GMIIDELAY, 621 VSC73XX_GMIIDELAY_GMII0_GTXDELAY_2_0_NS | 622 VSC73XX_GMIIDELAY_GMII0_RXDELAY_2_0_NS); 623 /* Enable reception of frames on all ports */ 624 vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_RECVMASK, 625 0x5f); 626 /* IP multicast flood mask (table 144) */ 627 vsc73xx_write(vsc, VSC73XX_BLOCK_ANALYZER, 0, VSC73XX_IFLODMSK, 628 0xff); 629 630 mdelay(50); 631 632 /* Release reset from the internal PHYs */ 633 vsc73xx_write(vsc, VSC73XX_BLOCK_SYSTEM, 0, VSC73XX_GLORESET, 634 VSC73XX_GLORESET_PHY_RESET); 635 636 udelay(4); 637 638 return 0; 639 } 640 641 static void vsc73xx_init_port(struct vsc73xx *vsc, int port) 642 { 643 u32 val; 644 645 /* MAC configure, first reset the port and then write defaults */ 646 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 647 port, 648 VSC73XX_MAC_CFG, 649 VSC73XX_MAC_CFG_RESET); 650 651 /* Take up the port in 1Gbit mode by default, this will be 652 * augmented after auto-negotiation on the PHY-facing 653 * ports. 654 */ 655 if (port == CPU_PORT) 656 val = VSC73XX_MAC_CFG_1000M_F_RGMII; 657 else 658 val = VSC73XX_MAC_CFG_1000M_F_PHY; 659 660 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 661 port, 662 VSC73XX_MAC_CFG, 663 val | 664 VSC73XX_MAC_CFG_TX_EN | 665 VSC73XX_MAC_CFG_RX_EN); 666 667 /* Max length, we can do up to 9.6 KiB, so allow that. 668 * According to application not "VSC7398 Jumbo Frames" setting 669 * up the MTU to 9.6 KB does not affect the performance on standard 670 * frames, so just enable it. It is clear from the application note 671 * that "9.6 kilobytes" == 9600 bytes. 672 */ 673 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 674 port, 675 VSC73XX_MAXLEN, 9600); 676 677 /* Flow control for the CPU port: 678 * Use a zero delay pause frame when pause condition is left 679 * Obey pause control frames 680 */ 681 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 682 port, 683 VSC73XX_FCCONF, 684 VSC73XX_FCCONF_ZERO_PAUSE_EN | 685 VSC73XX_FCCONF_FLOW_CTRL_OBEY); 686 687 /* Issue pause control frames on PHY facing ports. 688 * Allow early initiation of MAC transmission if the amount 689 * of egress data is below 512 bytes on CPU port. 690 * FIXME: enable 20KiB buffers? 691 */ 692 if (port == CPU_PORT) 693 val = VSC73XX_Q_MISC_CONF_EARLY_TX_512; 694 else 695 val = VSC73XX_Q_MISC_CONF_MAC_PAUSE_MODE; 696 val |= VSC73XX_Q_MISC_CONF_EXTENT_MEM; 697 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 698 port, 699 VSC73XX_Q_MISC_CONF, 700 val); 701 702 /* Flow control MAC: a MAC address used in flow control frames */ 703 val = (vsc->addr[5] << 16) | (vsc->addr[4] << 8) | (vsc->addr[3]); 704 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 705 port, 706 VSC73XX_FCMACHI, 707 val); 708 val = (vsc->addr[2] << 16) | (vsc->addr[1] << 8) | (vsc->addr[0]); 709 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 710 port, 711 VSC73XX_FCMACLO, 712 val); 713 714 /* Tell the categorizer to forward pause frames, not control 715 * frame. Do not drop anything. 716 */ 717 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 718 port, 719 VSC73XX_CAT_DROP, 720 VSC73XX_CAT_DROP_FWD_PAUSE_ENA); 721 722 /* Clear all counters */ 723 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 724 port, VSC73XX_C_RX0, 0); 725 } 726 727 static void vsc73xx_adjust_enable_port(struct vsc73xx *vsc, 728 int port, struct phy_device *phydev, 729 u32 initval) 730 { 731 u32 val = initval; 732 u8 seed; 733 734 /* Reset this port FIXME: break out subroutine */ 735 val |= VSC73XX_MAC_CFG_RESET; 736 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val); 737 738 /* Seed the port randomness with randomness */ 739 get_random_bytes(&seed, 1); 740 val |= seed << VSC73XX_MAC_CFG_SEED_OFFSET; 741 val |= VSC73XX_MAC_CFG_SEED_LOAD; 742 val |= VSC73XX_MAC_CFG_WEXC_DIS; 743 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val); 744 745 /* Flow control for the PHY facing ports: 746 * Use a zero delay pause frame when pause condition is left 747 * Obey pause control frames 748 * When generating pause frames, use 0xff as pause value 749 */ 750 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_FCCONF, 751 VSC73XX_FCCONF_ZERO_PAUSE_EN | 752 VSC73XX_FCCONF_FLOW_CTRL_OBEY | 753 0xff); 754 755 /* Disallow backward dropping of frames from this port */ 756 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 757 VSC73XX_SBACKWDROP, BIT(port), 0); 758 759 /* Enable TX, RX, deassert reset, stop loading seed */ 760 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, 761 VSC73XX_MAC_CFG, 762 VSC73XX_MAC_CFG_RESET | VSC73XX_MAC_CFG_SEED_LOAD | 763 VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN, 764 VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN); 765 } 766 767 static void vsc73xx_adjust_link(struct dsa_switch *ds, int port, 768 struct phy_device *phydev) 769 { 770 struct vsc73xx *vsc = ds->priv; 771 u32 val; 772 773 /* Special handling of the CPU-facing port */ 774 if (port == CPU_PORT) { 775 /* Other ports are already initialized but not this one */ 776 vsc73xx_init_port(vsc, CPU_PORT); 777 /* Select the external port for this interface (EXT_PORT) 778 * Enable the GMII GTX external clock 779 * Use double data rate (DDR mode) 780 */ 781 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 782 CPU_PORT, 783 VSC73XX_ADVPORTM, 784 VSC73XX_ADVPORTM_EXT_PORT | 785 VSC73XX_ADVPORTM_ENA_GTX | 786 VSC73XX_ADVPORTM_DDR_MODE); 787 } 788 789 /* This is the MAC confiuration that always need to happen 790 * after a PHY or the CPU port comes up or down. 791 */ 792 if (!phydev->link) { 793 int maxloop = 10; 794 795 dev_dbg(vsc->dev, "port %d: went down\n", 796 port); 797 798 /* Disable RX on this port */ 799 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, 800 VSC73XX_MAC_CFG, 801 VSC73XX_MAC_CFG_RX_EN, 0); 802 803 /* Discard packets */ 804 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 805 VSC73XX_ARBDISC, BIT(port), BIT(port)); 806 807 /* Wait until queue is empty */ 808 vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0, 809 VSC73XX_ARBEMPTY, &val); 810 while (!(val & BIT(port))) { 811 msleep(1); 812 vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0, 813 VSC73XX_ARBEMPTY, &val); 814 if (--maxloop == 0) { 815 dev_err(vsc->dev, 816 "timeout waiting for block arbiter\n"); 817 /* Continue anyway */ 818 break; 819 } 820 } 821 822 /* Put this port into reset */ 823 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, 824 VSC73XX_MAC_CFG_RESET); 825 826 /* Accept packets again */ 827 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 828 VSC73XX_ARBDISC, BIT(port), 0); 829 830 /* Allow backward dropping of frames from this port */ 831 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 832 VSC73XX_SBACKWDROP, BIT(port), BIT(port)); 833 834 /* Receive mask (disable forwarding) */ 835 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, 836 VSC73XX_RECVMASK, BIT(port), 0); 837 838 return; 839 } 840 841 /* Figure out what speed was negotiated */ 842 if (phydev->speed == SPEED_1000) { 843 dev_dbg(vsc->dev, "port %d: 1000 Mbit mode full duplex\n", 844 port); 845 846 /* Set up default for internal port or external RGMII */ 847 if (phydev->interface == PHY_INTERFACE_MODE_RGMII) 848 val = VSC73XX_MAC_CFG_1000M_F_RGMII; 849 else 850 val = VSC73XX_MAC_CFG_1000M_F_PHY; 851 vsc73xx_adjust_enable_port(vsc, port, phydev, val); 852 } else if (phydev->speed == SPEED_100) { 853 if (phydev->duplex == DUPLEX_FULL) { 854 val = VSC73XX_MAC_CFG_100_10M_F_PHY; 855 dev_dbg(vsc->dev, 856 "port %d: 100 Mbit full duplex mode\n", 857 port); 858 } else { 859 val = VSC73XX_MAC_CFG_100_10M_H_PHY; 860 dev_dbg(vsc->dev, 861 "port %d: 100 Mbit half duplex mode\n", 862 port); 863 } 864 vsc73xx_adjust_enable_port(vsc, port, phydev, val); 865 } else if (phydev->speed == SPEED_10) { 866 if (phydev->duplex == DUPLEX_FULL) { 867 val = VSC73XX_MAC_CFG_100_10M_F_PHY; 868 dev_dbg(vsc->dev, 869 "port %d: 10 Mbit full duplex mode\n", 870 port); 871 } else { 872 val = VSC73XX_MAC_CFG_100_10M_H_PHY; 873 dev_dbg(vsc->dev, 874 "port %d: 10 Mbit half duplex mode\n", 875 port); 876 } 877 vsc73xx_adjust_enable_port(vsc, port, phydev, val); 878 } else { 879 dev_err(vsc->dev, 880 "could not adjust link: unknown speed\n"); 881 } 882 883 /* Enable port (forwarding) in the receieve mask */ 884 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, 885 VSC73XX_RECVMASK, BIT(port), BIT(port)); 886 } 887 888 static int vsc73xx_port_enable(struct dsa_switch *ds, int port, 889 struct phy_device *phy) 890 { 891 struct vsc73xx *vsc = ds->priv; 892 893 dev_info(vsc->dev, "enable port %d\n", port); 894 vsc73xx_init_port(vsc, port); 895 896 return 0; 897 } 898 899 static void vsc73xx_port_disable(struct dsa_switch *ds, int port) 900 { 901 struct vsc73xx *vsc = ds->priv; 902 903 /* Just put the port into reset */ 904 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, 905 VSC73XX_MAC_CFG, VSC73XX_MAC_CFG_RESET); 906 } 907 908 static const struct vsc73xx_counter * 909 vsc73xx_find_counter(struct vsc73xx *vsc, 910 u8 counter, 911 bool tx) 912 { 913 const struct vsc73xx_counter *cnts; 914 int num_cnts; 915 int i; 916 917 if (tx) { 918 cnts = vsc73xx_tx_counters; 919 num_cnts = ARRAY_SIZE(vsc73xx_tx_counters); 920 } else { 921 cnts = vsc73xx_rx_counters; 922 num_cnts = ARRAY_SIZE(vsc73xx_rx_counters); 923 } 924 925 for (i = 0; i < num_cnts; i++) { 926 const struct vsc73xx_counter *cnt; 927 928 cnt = &cnts[i]; 929 if (cnt->counter == counter) 930 return cnt; 931 } 932 933 return NULL; 934 } 935 936 static void vsc73xx_get_strings(struct dsa_switch *ds, int port, u32 stringset, 937 uint8_t *data) 938 { 939 const struct vsc73xx_counter *cnt; 940 struct vsc73xx *vsc = ds->priv; 941 u8 indices[6]; 942 int i, j; 943 u32 val; 944 int ret; 945 946 if (stringset != ETH_SS_STATS) 947 return; 948 949 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, 950 VSC73XX_C_CFG, &val); 951 if (ret) 952 return; 953 954 indices[0] = (val & 0x1f); /* RX counter 0 */ 955 indices[1] = ((val >> 5) & 0x1f); /* RX counter 1 */ 956 indices[2] = ((val >> 10) & 0x1f); /* RX counter 2 */ 957 indices[3] = ((val >> 16) & 0x1f); /* TX counter 0 */ 958 indices[4] = ((val >> 21) & 0x1f); /* TX counter 1 */ 959 indices[5] = ((val >> 26) & 0x1f); /* TX counter 2 */ 960 961 /* The first counters is the RX octets */ 962 j = 0; 963 strncpy(data + j * ETH_GSTRING_LEN, 964 "RxEtherStatsOctets", ETH_GSTRING_LEN); 965 j++; 966 967 /* Each port supports recording 3 RX counters and 3 TX counters, 968 * figure out what counters we use in this set-up and return the 969 * names of them. The hardware default counters will be number of 970 * packets on RX/TX, combined broadcast+multicast packets RX/TX and 971 * total error packets RX/TX. 972 */ 973 for (i = 0; i < 3; i++) { 974 cnt = vsc73xx_find_counter(vsc, indices[i], false); 975 if (cnt) 976 strncpy(data + j * ETH_GSTRING_LEN, 977 cnt->name, ETH_GSTRING_LEN); 978 j++; 979 } 980 981 /* TX stats begins with the number of TX octets */ 982 strncpy(data + j * ETH_GSTRING_LEN, 983 "TxEtherStatsOctets", ETH_GSTRING_LEN); 984 j++; 985 986 for (i = 3; i < 6; i++) { 987 cnt = vsc73xx_find_counter(vsc, indices[i], true); 988 if (cnt) 989 strncpy(data + j * ETH_GSTRING_LEN, 990 cnt->name, ETH_GSTRING_LEN); 991 j++; 992 } 993 } 994 995 static int vsc73xx_get_sset_count(struct dsa_switch *ds, int port, int sset) 996 { 997 /* We only support SS_STATS */ 998 if (sset != ETH_SS_STATS) 999 return 0; 1000 /* RX and TX packets, then 3 RX counters, 3 TX counters */ 1001 return 8; 1002 } 1003 1004 static void vsc73xx_get_ethtool_stats(struct dsa_switch *ds, int port, 1005 uint64_t *data) 1006 { 1007 struct vsc73xx *vsc = ds->priv; 1008 u8 regs[] = { 1009 VSC73XX_RXOCT, 1010 VSC73XX_C_RX0, 1011 VSC73XX_C_RX1, 1012 VSC73XX_C_RX2, 1013 VSC73XX_TXOCT, 1014 VSC73XX_C_TX0, 1015 VSC73XX_C_TX1, 1016 VSC73XX_C_TX2, 1017 }; 1018 u32 val; 1019 int ret; 1020 int i; 1021 1022 for (i = 0; i < ARRAY_SIZE(regs); i++) { 1023 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, 1024 regs[i], &val); 1025 if (ret) { 1026 dev_err(vsc->dev, "error reading counter %d\n", i); 1027 return; 1028 } 1029 data[i] = val; 1030 } 1031 } 1032 1033 static const struct dsa_switch_ops vsc73xx_ds_ops = { 1034 .get_tag_protocol = vsc73xx_get_tag_protocol, 1035 .setup = vsc73xx_setup, 1036 .phy_read = vsc73xx_phy_read, 1037 .phy_write = vsc73xx_phy_write, 1038 .adjust_link = vsc73xx_adjust_link, 1039 .get_strings = vsc73xx_get_strings, 1040 .get_ethtool_stats = vsc73xx_get_ethtool_stats, 1041 .get_sset_count = vsc73xx_get_sset_count, 1042 .port_enable = vsc73xx_port_enable, 1043 .port_disable = vsc73xx_port_disable, 1044 }; 1045 1046 static int vsc73xx_gpio_get(struct gpio_chip *chip, unsigned int offset) 1047 { 1048 struct vsc73xx *vsc = gpiochip_get_data(chip); 1049 u32 val; 1050 int ret; 1051 1052 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1053 VSC73XX_GPIO, &val); 1054 if (ret) 1055 return ret; 1056 1057 return !!(val & BIT(offset)); 1058 } 1059 1060 static void vsc73xx_gpio_set(struct gpio_chip *chip, unsigned int offset, 1061 int val) 1062 { 1063 struct vsc73xx *vsc = gpiochip_get_data(chip); 1064 u32 tmp = val ? BIT(offset) : 0; 1065 1066 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1067 VSC73XX_GPIO, BIT(offset), tmp); 1068 } 1069 1070 static int vsc73xx_gpio_direction_output(struct gpio_chip *chip, 1071 unsigned int offset, int val) 1072 { 1073 struct vsc73xx *vsc = gpiochip_get_data(chip); 1074 u32 tmp = val ? BIT(offset) : 0; 1075 1076 return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1077 VSC73XX_GPIO, BIT(offset + 4) | BIT(offset), 1078 BIT(offset + 4) | tmp); 1079 } 1080 1081 static int vsc73xx_gpio_direction_input(struct gpio_chip *chip, 1082 unsigned int offset) 1083 { 1084 struct vsc73xx *vsc = gpiochip_get_data(chip); 1085 1086 return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1087 VSC73XX_GPIO, BIT(offset + 4), 1088 0); 1089 } 1090 1091 static int vsc73xx_gpio_get_direction(struct gpio_chip *chip, 1092 unsigned int offset) 1093 { 1094 struct vsc73xx *vsc = gpiochip_get_data(chip); 1095 u32 val; 1096 int ret; 1097 1098 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1099 VSC73XX_GPIO, &val); 1100 if (ret) 1101 return ret; 1102 1103 return !(val & BIT(offset + 4)); 1104 } 1105 1106 static int vsc73xx_gpio_probe(struct vsc73xx *vsc) 1107 { 1108 int ret; 1109 1110 vsc->gc.label = devm_kasprintf(vsc->dev, GFP_KERNEL, "VSC%04x", 1111 vsc->chipid); 1112 vsc->gc.ngpio = 4; 1113 vsc->gc.owner = THIS_MODULE; 1114 vsc->gc.parent = vsc->dev; 1115 #if IS_ENABLED(CONFIG_OF_GPIO) 1116 vsc->gc.of_node = vsc->dev->of_node; 1117 #endif 1118 vsc->gc.base = -1; 1119 vsc->gc.get = vsc73xx_gpio_get; 1120 vsc->gc.set = vsc73xx_gpio_set; 1121 vsc->gc.direction_input = vsc73xx_gpio_direction_input; 1122 vsc->gc.direction_output = vsc73xx_gpio_direction_output; 1123 vsc->gc.get_direction = vsc73xx_gpio_get_direction; 1124 vsc->gc.can_sleep = true; 1125 ret = devm_gpiochip_add_data(vsc->dev, &vsc->gc, vsc); 1126 if (ret) { 1127 dev_err(vsc->dev, "unable to register GPIO chip\n"); 1128 return ret; 1129 } 1130 return 0; 1131 } 1132 1133 int vsc73xx_probe(struct vsc73xx *vsc) 1134 { 1135 struct device *dev = vsc->dev; 1136 int ret; 1137 1138 /* Release reset, if any */ 1139 vsc->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); 1140 if (IS_ERR(vsc->reset)) { 1141 dev_err(dev, "failed to get RESET GPIO\n"); 1142 return PTR_ERR(vsc->reset); 1143 } 1144 if (vsc->reset) 1145 /* Wait 20ms according to datasheet table 245 */ 1146 msleep(20); 1147 1148 ret = vsc73xx_detect(vsc); 1149 if (ret == -EAGAIN) { 1150 dev_err(vsc->dev, 1151 "Chip seems to be out of control. Assert reset and try again.\n"); 1152 gpiod_set_value_cansleep(vsc->reset, 1); 1153 /* Reset pulse should be 20ns minimum, according to datasheet 1154 * table 245, so 10us should be fine 1155 */ 1156 usleep_range(10, 100); 1157 gpiod_set_value_cansleep(vsc->reset, 0); 1158 /* Wait 20ms according to datasheet table 245 */ 1159 msleep(20); 1160 ret = vsc73xx_detect(vsc); 1161 } 1162 if (ret) { 1163 dev_err(dev, "no chip found (%d)\n", ret); 1164 return -ENODEV; 1165 } 1166 1167 eth_random_addr(vsc->addr); 1168 dev_info(vsc->dev, 1169 "MAC for control frames: %02X:%02X:%02X:%02X:%02X:%02X\n", 1170 vsc->addr[0], vsc->addr[1], vsc->addr[2], 1171 vsc->addr[3], vsc->addr[4], vsc->addr[5]); 1172 1173 /* The VSC7395 switch chips have 5+1 ports which means 5 1174 * ordinary ports and a sixth CPU port facing the processor 1175 * with an RGMII interface. These ports are numbered 0..4 1176 * and 6, so they leave a "hole" in the port map for port 5, 1177 * which is invalid. 1178 * 1179 * The VSC7398 has 8 ports, port 7 is again the CPU port. 1180 * 1181 * We allocate 8 ports and avoid access to the nonexistant 1182 * ports. 1183 */ 1184 vsc->ds = devm_kzalloc(dev, sizeof(*vsc->ds), GFP_KERNEL); 1185 if (!vsc->ds) 1186 return -ENOMEM; 1187 1188 vsc->ds->dev = dev; 1189 vsc->ds->num_ports = 8; 1190 vsc->ds->priv = vsc; 1191 1192 vsc->ds->ops = &vsc73xx_ds_ops; 1193 ret = dsa_register_switch(vsc->ds); 1194 if (ret) { 1195 dev_err(dev, "unable to register switch (%d)\n", ret); 1196 return ret; 1197 } 1198 1199 ret = vsc73xx_gpio_probe(vsc); 1200 if (ret) { 1201 dsa_unregister_switch(vsc->ds); 1202 return ret; 1203 } 1204 1205 return 0; 1206 } 1207 EXPORT_SYMBOL(vsc73xx_probe); 1208 1209 int vsc73xx_remove(struct vsc73xx *vsc) 1210 { 1211 dsa_unregister_switch(vsc->ds); 1212 gpiod_set_value(vsc->reset, 1); 1213 1214 return 0; 1215 } 1216 EXPORT_SYMBOL(vsc73xx_remove); 1217 1218 MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); 1219 MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 driver"); 1220 MODULE_LICENSE("GPL v2"); 1221