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 272struct 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 */ 282static 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 313static 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 343int 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} 374EXPORT_SYMBOL(vsc73xx_is_addr_valid); 375 376static 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 382static 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 388static 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 403static 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 487static 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 516static 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 544static 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 560static 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 641static 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 /* Flow control for the CPU port: 668 * Use a zero delay pause frame when pause condition is left 669 * Obey pause control frames 670 */ 671 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 672 port, 673 VSC73XX_FCCONF, 674 VSC73XX_FCCONF_ZERO_PAUSE_EN | 675 VSC73XX_FCCONF_FLOW_CTRL_OBEY); 676 677 /* Issue pause control frames on PHY facing ports. 678 * Allow early initiation of MAC transmission if the amount 679 * of egress data is below 512 bytes on CPU port. 680 * FIXME: enable 20KiB buffers? 681 */ 682 if (port == CPU_PORT) 683 val = VSC73XX_Q_MISC_CONF_EARLY_TX_512; 684 else 685 val = VSC73XX_Q_MISC_CONF_MAC_PAUSE_MODE; 686 val |= VSC73XX_Q_MISC_CONF_EXTENT_MEM; 687 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 688 port, 689 VSC73XX_Q_MISC_CONF, 690 val); 691 692 /* Flow control MAC: a MAC address used in flow control frames */ 693 val = (vsc->addr[5] << 16) | (vsc->addr[4] << 8) | (vsc->addr[3]); 694 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 695 port, 696 VSC73XX_FCMACHI, 697 val); 698 val = (vsc->addr[2] << 16) | (vsc->addr[1] << 8) | (vsc->addr[0]); 699 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 700 port, 701 VSC73XX_FCMACLO, 702 val); 703 704 /* Tell the categorizer to forward pause frames, not control 705 * frame. Do not drop anything. 706 */ 707 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 708 port, 709 VSC73XX_CAT_DROP, 710 VSC73XX_CAT_DROP_FWD_PAUSE_ENA); 711 712 /* Clear all counters */ 713 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 714 port, VSC73XX_C_RX0, 0); 715} 716 717static void vsc73xx_adjust_enable_port(struct vsc73xx *vsc, 718 int port, struct phy_device *phydev, 719 u32 initval) 720{ 721 u32 val = initval; 722 u8 seed; 723 724 /* Reset this port FIXME: break out subroutine */ 725 val |= VSC73XX_MAC_CFG_RESET; 726 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val); 727 728 /* Seed the port randomness with randomness */ 729 get_random_bytes(&seed, 1); 730 val |= seed << VSC73XX_MAC_CFG_SEED_OFFSET; 731 val |= VSC73XX_MAC_CFG_SEED_LOAD; 732 val |= VSC73XX_MAC_CFG_WEXC_DIS; 733 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, val); 734 735 /* Flow control for the PHY facing ports: 736 * Use a zero delay pause frame when pause condition is left 737 * Obey pause control frames 738 * When generating pause frames, use 0xff as pause value 739 */ 740 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_FCCONF, 741 VSC73XX_FCCONF_ZERO_PAUSE_EN | 742 VSC73XX_FCCONF_FLOW_CTRL_OBEY | 743 0xff); 744 745 /* Disallow backward dropping of frames from this port */ 746 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 747 VSC73XX_SBACKWDROP, BIT(port), 0); 748 749 /* Enable TX, RX, deassert reset, stop loading seed */ 750 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, 751 VSC73XX_MAC_CFG, 752 VSC73XX_MAC_CFG_RESET | VSC73XX_MAC_CFG_SEED_LOAD | 753 VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN, 754 VSC73XX_MAC_CFG_TX_EN | VSC73XX_MAC_CFG_RX_EN); 755} 756 757static void vsc73xx_adjust_link(struct dsa_switch *ds, int port, 758 struct phy_device *phydev) 759{ 760 struct vsc73xx *vsc = ds->priv; 761 u32 val; 762 763 /* Special handling of the CPU-facing port */ 764 if (port == CPU_PORT) { 765 /* Other ports are already initialized but not this one */ 766 vsc73xx_init_port(vsc, CPU_PORT); 767 /* Select the external port for this interface (EXT_PORT) 768 * Enable the GMII GTX external clock 769 * Use double data rate (DDR mode) 770 */ 771 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, 772 CPU_PORT, 773 VSC73XX_ADVPORTM, 774 VSC73XX_ADVPORTM_EXT_PORT | 775 VSC73XX_ADVPORTM_ENA_GTX | 776 VSC73XX_ADVPORTM_DDR_MODE); 777 } 778 779 /* This is the MAC confiuration that always need to happen 780 * after a PHY or the CPU port comes up or down. 781 */ 782 if (!phydev->link) { 783 int maxloop = 10; 784 785 dev_dbg(vsc->dev, "port %d: went down\n", 786 port); 787 788 /* Disable RX on this port */ 789 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_MAC, port, 790 VSC73XX_MAC_CFG, 791 VSC73XX_MAC_CFG_RX_EN, 0); 792 793 /* Discard packets */ 794 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 795 VSC73XX_ARBDISC, BIT(port), BIT(port)); 796 797 /* Wait until queue is empty */ 798 vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0, 799 VSC73XX_ARBEMPTY, &val); 800 while (!(val & BIT(port))) { 801 msleep(1); 802 vsc73xx_read(vsc, VSC73XX_BLOCK_ARBITER, 0, 803 VSC73XX_ARBEMPTY, &val); 804 if (--maxloop == 0) { 805 dev_err(vsc->dev, 806 "timeout waiting for block arbiter\n"); 807 /* Continue anyway */ 808 break; 809 } 810 } 811 812 /* Put this port into reset */ 813 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, VSC73XX_MAC_CFG, 814 VSC73XX_MAC_CFG_RESET); 815 816 /* Accept packets again */ 817 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 818 VSC73XX_ARBDISC, BIT(port), 0); 819 820 /* Allow backward dropping of frames from this port */ 821 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ARBITER, 0, 822 VSC73XX_SBACKWDROP, BIT(port), BIT(port)); 823 824 /* Receive mask (disable forwarding) */ 825 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, 826 VSC73XX_RECVMASK, BIT(port), 0); 827 828 return; 829 } 830 831 /* Figure out what speed was negotiated */ 832 if (phydev->speed == SPEED_1000) { 833 dev_dbg(vsc->dev, "port %d: 1000 Mbit mode full duplex\n", 834 port); 835 836 /* Set up default for internal port or external RGMII */ 837 if (phydev->interface == PHY_INTERFACE_MODE_RGMII) 838 val = VSC73XX_MAC_CFG_1000M_F_RGMII; 839 else 840 val = VSC73XX_MAC_CFG_1000M_F_PHY; 841 vsc73xx_adjust_enable_port(vsc, port, phydev, val); 842 } else if (phydev->speed == SPEED_100) { 843 if (phydev->duplex == DUPLEX_FULL) { 844 val = VSC73XX_MAC_CFG_100_10M_F_PHY; 845 dev_dbg(vsc->dev, 846 "port %d: 100 Mbit full duplex mode\n", 847 port); 848 } else { 849 val = VSC73XX_MAC_CFG_100_10M_H_PHY; 850 dev_dbg(vsc->dev, 851 "port %d: 100 Mbit half duplex mode\n", 852 port); 853 } 854 vsc73xx_adjust_enable_port(vsc, port, phydev, val); 855 } else if (phydev->speed == SPEED_10) { 856 if (phydev->duplex == DUPLEX_FULL) { 857 val = VSC73XX_MAC_CFG_100_10M_F_PHY; 858 dev_dbg(vsc->dev, 859 "port %d: 10 Mbit full duplex mode\n", 860 port); 861 } else { 862 val = VSC73XX_MAC_CFG_100_10M_H_PHY; 863 dev_dbg(vsc->dev, 864 "port %d: 10 Mbit half duplex mode\n", 865 port); 866 } 867 vsc73xx_adjust_enable_port(vsc, port, phydev, val); 868 } else { 869 dev_err(vsc->dev, 870 "could not adjust link: unknown speed\n"); 871 } 872 873 /* Enable port (forwarding) in the receieve mask */ 874 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_ANALYZER, 0, 875 VSC73XX_RECVMASK, BIT(port), BIT(port)); 876} 877 878static int vsc73xx_port_enable(struct dsa_switch *ds, int port, 879 struct phy_device *phy) 880{ 881 struct vsc73xx *vsc = ds->priv; 882 883 dev_info(vsc->dev, "enable port %d\n", port); 884 vsc73xx_init_port(vsc, port); 885 886 return 0; 887} 888 889static void vsc73xx_port_disable(struct dsa_switch *ds, int port) 890{ 891 struct vsc73xx *vsc = ds->priv; 892 893 /* Just put the port into reset */ 894 vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, 895 VSC73XX_MAC_CFG, VSC73XX_MAC_CFG_RESET); 896} 897 898static const struct vsc73xx_counter * 899vsc73xx_find_counter(struct vsc73xx *vsc, 900 u8 counter, 901 bool tx) 902{ 903 const struct vsc73xx_counter *cnts; 904 int num_cnts; 905 int i; 906 907 if (tx) { 908 cnts = vsc73xx_tx_counters; 909 num_cnts = ARRAY_SIZE(vsc73xx_tx_counters); 910 } else { 911 cnts = vsc73xx_rx_counters; 912 num_cnts = ARRAY_SIZE(vsc73xx_rx_counters); 913 } 914 915 for (i = 0; i < num_cnts; i++) { 916 const struct vsc73xx_counter *cnt; 917 918 cnt = &cnts[i]; 919 if (cnt->counter == counter) 920 return cnt; 921 } 922 923 return NULL; 924} 925 926static void vsc73xx_get_strings(struct dsa_switch *ds, int port, u32 stringset, 927 uint8_t *data) 928{ 929 const struct vsc73xx_counter *cnt; 930 struct vsc73xx *vsc = ds->priv; 931 u8 indices[6]; 932 int i, j; 933 u32 val; 934 int ret; 935 936 if (stringset != ETH_SS_STATS) 937 return; 938 939 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, 940 VSC73XX_C_CFG, &val); 941 if (ret) 942 return; 943 944 indices[0] = (val & 0x1f); /* RX counter 0 */ 945 indices[1] = ((val >> 5) & 0x1f); /* RX counter 1 */ 946 indices[2] = ((val >> 10) & 0x1f); /* RX counter 2 */ 947 indices[3] = ((val >> 16) & 0x1f); /* TX counter 0 */ 948 indices[4] = ((val >> 21) & 0x1f); /* TX counter 1 */ 949 indices[5] = ((val >> 26) & 0x1f); /* TX counter 2 */ 950 951 /* The first counters is the RX octets */ 952 j = 0; 953 strncpy(data + j * ETH_GSTRING_LEN, 954 "RxEtherStatsOctets", ETH_GSTRING_LEN); 955 j++; 956 957 /* Each port supports recording 3 RX counters and 3 TX counters, 958 * figure out what counters we use in this set-up and return the 959 * names of them. The hardware default counters will be number of 960 * packets on RX/TX, combined broadcast+multicast packets RX/TX and 961 * total error packets RX/TX. 962 */ 963 for (i = 0; i < 3; i++) { 964 cnt = vsc73xx_find_counter(vsc, indices[i], false); 965 if (cnt) 966 strncpy(data + j * ETH_GSTRING_LEN, 967 cnt->name, ETH_GSTRING_LEN); 968 j++; 969 } 970 971 /* TX stats begins with the number of TX octets */ 972 strncpy(data + j * ETH_GSTRING_LEN, 973 "TxEtherStatsOctets", ETH_GSTRING_LEN); 974 j++; 975 976 for (i = 3; i < 6; i++) { 977 cnt = vsc73xx_find_counter(vsc, indices[i], true); 978 if (cnt) 979 strncpy(data + j * ETH_GSTRING_LEN, 980 cnt->name, ETH_GSTRING_LEN); 981 j++; 982 } 983} 984 985static int vsc73xx_get_sset_count(struct dsa_switch *ds, int port, int sset) 986{ 987 /* We only support SS_STATS */ 988 if (sset != ETH_SS_STATS) 989 return 0; 990 /* RX and TX packets, then 3 RX counters, 3 TX counters */ 991 return 8; 992} 993 994static void vsc73xx_get_ethtool_stats(struct dsa_switch *ds, int port, 995 uint64_t *data) 996{ 997 struct vsc73xx *vsc = ds->priv; 998 u8 regs[] = { 999 VSC73XX_RXOCT, 1000 VSC73XX_C_RX0, 1001 VSC73XX_C_RX1, 1002 VSC73XX_C_RX2, 1003 VSC73XX_TXOCT, 1004 VSC73XX_C_TX0, 1005 VSC73XX_C_TX1, 1006 VSC73XX_C_TX2, 1007 }; 1008 u32 val; 1009 int ret; 1010 int i; 1011 1012 for (i = 0; i < ARRAY_SIZE(regs); i++) { 1013 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_MAC, port, 1014 regs[i], &val); 1015 if (ret) { 1016 dev_err(vsc->dev, "error reading counter %d\n", i); 1017 return; 1018 } 1019 data[i] = val; 1020 } 1021} 1022 1023static int vsc73xx_change_mtu(struct dsa_switch *ds, int port, int new_mtu) 1024{ 1025 struct vsc73xx *vsc = ds->priv; 1026 1027 return vsc73xx_write(vsc, VSC73XX_BLOCK_MAC, port, 1028 VSC73XX_MAXLEN, new_mtu + ETH_HLEN + ETH_FCS_LEN); 1029} 1030 1031/* According to application not "VSC7398 Jumbo Frames" setting 1032 * up the frame size to 9.6 KB does not affect the performance on standard 1033 * frames. It is clear from the application note that 1034 * "9.6 kilobytes" == 9600 bytes. 1035 */ 1036static int vsc73xx_get_max_mtu(struct dsa_switch *ds, int port) 1037{ 1038 return 9600 - ETH_HLEN - ETH_FCS_LEN; 1039} 1040 1041static const struct dsa_switch_ops vsc73xx_ds_ops = { 1042 .get_tag_protocol = vsc73xx_get_tag_protocol, 1043 .setup = vsc73xx_setup, 1044 .phy_read = vsc73xx_phy_read, 1045 .phy_write = vsc73xx_phy_write, 1046 .adjust_link = vsc73xx_adjust_link, 1047 .get_strings = vsc73xx_get_strings, 1048 .get_ethtool_stats = vsc73xx_get_ethtool_stats, 1049 .get_sset_count = vsc73xx_get_sset_count, 1050 .port_enable = vsc73xx_port_enable, 1051 .port_disable = vsc73xx_port_disable, 1052 .port_change_mtu = vsc73xx_change_mtu, 1053 .port_max_mtu = vsc73xx_get_max_mtu, 1054}; 1055 1056static int vsc73xx_gpio_get(struct gpio_chip *chip, unsigned int offset) 1057{ 1058 struct vsc73xx *vsc = gpiochip_get_data(chip); 1059 u32 val; 1060 int ret; 1061 1062 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1063 VSC73XX_GPIO, &val); 1064 if (ret) 1065 return ret; 1066 1067 return !!(val & BIT(offset)); 1068} 1069 1070static void vsc73xx_gpio_set(struct gpio_chip *chip, unsigned int offset, 1071 int val) 1072{ 1073 struct vsc73xx *vsc = gpiochip_get_data(chip); 1074 u32 tmp = val ? BIT(offset) : 0; 1075 1076 vsc73xx_update_bits(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1077 VSC73XX_GPIO, BIT(offset), tmp); 1078} 1079 1080static int vsc73xx_gpio_direction_output(struct gpio_chip *chip, 1081 unsigned int offset, int val) 1082{ 1083 struct vsc73xx *vsc = gpiochip_get_data(chip); 1084 u32 tmp = val ? BIT(offset) : 0; 1085 1086 return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1087 VSC73XX_GPIO, BIT(offset + 4) | BIT(offset), 1088 BIT(offset + 4) | tmp); 1089} 1090 1091static int vsc73xx_gpio_direction_input(struct gpio_chip *chip, 1092 unsigned int offset) 1093{ 1094 struct vsc73xx *vsc = gpiochip_get_data(chip); 1095 1096 return vsc73xx_update_bits(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1097 VSC73XX_GPIO, BIT(offset + 4), 1098 0); 1099} 1100 1101static int vsc73xx_gpio_get_direction(struct gpio_chip *chip, 1102 unsigned int offset) 1103{ 1104 struct vsc73xx *vsc = gpiochip_get_data(chip); 1105 u32 val; 1106 int ret; 1107 1108 ret = vsc73xx_read(vsc, VSC73XX_BLOCK_SYSTEM, 0, 1109 VSC73XX_GPIO, &val); 1110 if (ret) 1111 return ret; 1112 1113 return !(val & BIT(offset + 4)); 1114} 1115 1116static int vsc73xx_gpio_probe(struct vsc73xx *vsc) 1117{ 1118 int ret; 1119 1120 vsc->gc.label = devm_kasprintf(vsc->dev, GFP_KERNEL, "VSC%04x", 1121 vsc->chipid); 1122 if (!vsc->gc.label) 1123 return -ENOMEM; 1124 vsc->gc.ngpio = 4; 1125 vsc->gc.owner = THIS_MODULE; 1126 vsc->gc.parent = vsc->dev; 1127#if IS_ENABLED(CONFIG_OF_GPIO) 1128 vsc->gc.of_node = vsc->dev->of_node; 1129#endif 1130 vsc->gc.base = -1; 1131 vsc->gc.get = vsc73xx_gpio_get; 1132 vsc->gc.set = vsc73xx_gpio_set; 1133 vsc->gc.direction_input = vsc73xx_gpio_direction_input; 1134 vsc->gc.direction_output = vsc73xx_gpio_direction_output; 1135 vsc->gc.get_direction = vsc73xx_gpio_get_direction; 1136 vsc->gc.can_sleep = true; 1137 ret = devm_gpiochip_add_data(vsc->dev, &vsc->gc, vsc); 1138 if (ret) { 1139 dev_err(vsc->dev, "unable to register GPIO chip\n"); 1140 return ret; 1141 } 1142 return 0; 1143} 1144 1145int vsc73xx_probe(struct vsc73xx *vsc) 1146{ 1147 struct device *dev = vsc->dev; 1148 int ret; 1149 1150 /* Release reset, if any */ 1151 vsc->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); 1152 if (IS_ERR(vsc->reset)) { 1153 dev_err(dev, "failed to get RESET GPIO\n"); 1154 return PTR_ERR(vsc->reset); 1155 } 1156 if (vsc->reset) 1157 /* Wait 20ms according to datasheet table 245 */ 1158 msleep(20); 1159 1160 ret = vsc73xx_detect(vsc); 1161 if (ret == -EAGAIN) { 1162 dev_err(vsc->dev, 1163 "Chip seems to be out of control. Assert reset and try again.\n"); 1164 gpiod_set_value_cansleep(vsc->reset, 1); 1165 /* Reset pulse should be 20ns minimum, according to datasheet 1166 * table 245, so 10us should be fine 1167 */ 1168 usleep_range(10, 100); 1169 gpiod_set_value_cansleep(vsc->reset, 0); 1170 /* Wait 20ms according to datasheet table 245 */ 1171 msleep(20); 1172 ret = vsc73xx_detect(vsc); 1173 } 1174 if (ret) { 1175 dev_err(dev, "no chip found (%d)\n", ret); 1176 return -ENODEV; 1177 } 1178 1179 eth_random_addr(vsc->addr); 1180 dev_info(vsc->dev, 1181 "MAC for control frames: %02X:%02X:%02X:%02X:%02X:%02X\n", 1182 vsc->addr[0], vsc->addr[1], vsc->addr[2], 1183 vsc->addr[3], vsc->addr[4], vsc->addr[5]); 1184 1185 /* The VSC7395 switch chips have 5+1 ports which means 5 1186 * ordinary ports and a sixth CPU port facing the processor 1187 * with an RGMII interface. These ports are numbered 0..4 1188 * and 6, so they leave a "hole" in the port map for port 5, 1189 * which is invalid. 1190 * 1191 * The VSC7398 has 8 ports, port 7 is again the CPU port. 1192 * 1193 * We allocate 8 ports and avoid access to the nonexistant 1194 * ports. 1195 */ 1196 vsc->ds = devm_kzalloc(dev, sizeof(*vsc->ds), GFP_KERNEL); 1197 if (!vsc->ds) 1198 return -ENOMEM; 1199 1200 vsc->ds->dev = dev; 1201 vsc->ds->num_ports = 8; 1202 vsc->ds->priv = vsc; 1203 1204 vsc->ds->ops = &vsc73xx_ds_ops; 1205 ret = dsa_register_switch(vsc->ds); 1206 if (ret) { 1207 dev_err(dev, "unable to register switch (%d)\n", ret); 1208 return ret; 1209 } 1210 1211 ret = vsc73xx_gpio_probe(vsc); 1212 if (ret) { 1213 dsa_unregister_switch(vsc->ds); 1214 return ret; 1215 } 1216 1217 return 0; 1218} 1219EXPORT_SYMBOL(vsc73xx_probe); 1220 1221int vsc73xx_remove(struct vsc73xx *vsc) 1222{ 1223 dsa_unregister_switch(vsc->ds); 1224 gpiod_set_value(vsc->reset, 1); 1225 1226 return 0; 1227} 1228EXPORT_SYMBOL(vsc73xx_remove); 1229 1230MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>"); 1231MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 driver"); 1232MODULE_LICENSE("GPL v2"); 1233