developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * Copyright (c) 2018 MediaTek Inc. |
| 4 | * Author: Weijie Gao <weijie.gao@mediatek.com> |
| 5 | */ |
| 6 | |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/device.h> |
| 11 | #include <linux/delay.h> |
| 12 | #include <linux/reset.h> |
| 13 | #include <linux/hrtimer.h> |
| 14 | #include <linux/mii.h> |
| 15 | #include <linux/of_mdio.h> |
| 16 | #include <linux/of_platform.h> |
| 17 | #include <linux/of_gpio.h> |
| 18 | #include <linux/of_net.h> |
| 19 | #include <linux/of_irq.h> |
| 20 | #include <linux/phy.h> |
| 21 | |
| 22 | #include "mt753x.h" |
| 23 | #include "mt753x_swconfig.h" |
| 24 | #include "mt753x_regs.h" |
| 25 | #include "mt753x_nl.h" |
| 26 | #include "mt7530.h" |
| 27 | #include "mt7531.h" |
| 28 | |
| 29 | static u32 mt753x_id; |
| 30 | struct list_head mt753x_devs; |
| 31 | static DEFINE_MUTEX(mt753x_devs_lock); |
| 32 | |
| 33 | static struct mt753x_sw_id *mt753x_sw_ids[] = { |
| 34 | &mt7530_id, |
| 35 | &mt7531_id, |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 36 | &mt7988_id, |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 37 | }; |
| 38 | |
| 39 | u32 mt753x_reg_read(struct gsw_mt753x *gsw, u32 reg) |
| 40 | { |
| 41 | u32 high, low; |
| 42 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 43 | if (gsw->direct_access) |
| 44 | return __raw_readl(gsw->base + reg); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 45 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 46 | mutex_lock(&gsw->host_bus->mdio_lock); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 47 | gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, 0x1f, |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 48 | (reg & MT753X_REG_PAGE_ADDR_M) >> |
| 49 | MT753X_REG_PAGE_ADDR_S); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 50 | |
| 51 | low = gsw->host_bus->read(gsw->host_bus, gsw->smi_addr, |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 52 | (reg & MT753X_REG_ADDR_M) >> |
| 53 | MT753X_REG_ADDR_S); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 54 | |
| 55 | high = gsw->host_bus->read(gsw->host_bus, gsw->smi_addr, 0x10); |
| 56 | |
| 57 | mutex_unlock(&gsw->host_bus->mdio_lock); |
| 58 | |
| 59 | return (high << 16) | (low & 0xffff); |
| 60 | } |
| 61 | |
| 62 | void mt753x_reg_write(struct gsw_mt753x *gsw, u32 reg, u32 val) |
| 63 | { |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 64 | if (gsw->direct_access) { |
| 65 | __raw_writel(val, gsw->base + reg); |
| 66 | } else { |
| 67 | mutex_lock(&gsw->host_bus->mdio_lock); |
| 68 | gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, 0x1f, |
| 69 | (reg & MT753X_REG_PAGE_ADDR_M) >> |
| 70 | MT753X_REG_PAGE_ADDR_S); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 71 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 72 | gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, |
| 73 | (reg & MT753X_REG_ADDR_M) >> |
| 74 | MT753X_REG_ADDR_S, |
| 75 | val & 0xffff); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 76 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 77 | gsw->host_bus->write(gsw->host_bus, gsw->smi_addr, 0x10, |
| 78 | val >> 16); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 79 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 80 | mutex_unlock(&gsw->host_bus->mdio_lock); |
| 81 | } |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | /* Indirect MDIO clause 22/45 access */ |
| 85 | static int mt753x_mii_rw(struct gsw_mt753x *gsw, int phy, int reg, u16 data, |
| 86 | u32 cmd, u32 st) |
| 87 | { |
| 88 | ktime_t timeout; |
| 89 | u32 val, timeout_us; |
| 90 | int ret = 0; |
| 91 | |
| 92 | timeout_us = 100000; |
| 93 | timeout = ktime_add_us(ktime_get(), timeout_us); |
| 94 | while (1) { |
| 95 | val = mt753x_reg_read(gsw, PHY_IAC); |
| 96 | |
| 97 | if ((val & PHY_ACS_ST) == 0) |
| 98 | break; |
| 99 | |
| 100 | if (ktime_compare(ktime_get(), timeout) > 0) |
| 101 | return -ETIMEDOUT; |
| 102 | } |
| 103 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 104 | val = (st << MDIO_ST_S) | ((cmd << MDIO_CMD_S) & MDIO_CMD_M) | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 105 | ((phy << MDIO_PHY_ADDR_S) & MDIO_PHY_ADDR_M) | |
| 106 | ((reg << MDIO_REG_ADDR_S) & MDIO_REG_ADDR_M); |
| 107 | |
| 108 | if (cmd == MDIO_CMD_WRITE || cmd == MDIO_CMD_ADDR) |
| 109 | val |= data & MDIO_RW_DATA_M; |
| 110 | |
| 111 | mt753x_reg_write(gsw, PHY_IAC, val | PHY_ACS_ST); |
| 112 | |
| 113 | timeout_us = 100000; |
| 114 | timeout = ktime_add_us(ktime_get(), timeout_us); |
| 115 | while (1) { |
| 116 | val = mt753x_reg_read(gsw, PHY_IAC); |
| 117 | |
| 118 | if ((val & PHY_ACS_ST) == 0) |
| 119 | break; |
| 120 | |
| 121 | if (ktime_compare(ktime_get(), timeout) > 0) |
| 122 | return -ETIMEDOUT; |
| 123 | } |
| 124 | |
| 125 | if (cmd == MDIO_CMD_READ || cmd == MDIO_CMD_READ_C45) { |
| 126 | val = mt753x_reg_read(gsw, PHY_IAC); |
| 127 | ret = val & MDIO_RW_DATA_M; |
| 128 | } |
| 129 | |
| 130 | return ret; |
| 131 | } |
| 132 | |
| 133 | int mt753x_mii_read(struct gsw_mt753x *gsw, int phy, int reg) |
| 134 | { |
| 135 | int val; |
| 136 | |
| 137 | if (phy < MT753X_NUM_PHYS) |
| 138 | phy = (gsw->phy_base + phy) & MT753X_SMI_ADDR_MASK; |
| 139 | |
| 140 | mutex_lock(&gsw->mii_lock); |
| 141 | val = mt753x_mii_rw(gsw, phy, reg, 0, MDIO_CMD_READ, MDIO_ST_C22); |
| 142 | mutex_unlock(&gsw->mii_lock); |
| 143 | |
| 144 | return val; |
| 145 | } |
| 146 | |
| 147 | void mt753x_mii_write(struct gsw_mt753x *gsw, int phy, int reg, u16 val) |
| 148 | { |
| 149 | if (phy < MT753X_NUM_PHYS) |
| 150 | phy = (gsw->phy_base + phy) & MT753X_SMI_ADDR_MASK; |
| 151 | |
| 152 | mutex_lock(&gsw->mii_lock); |
| 153 | mt753x_mii_rw(gsw, phy, reg, val, MDIO_CMD_WRITE, MDIO_ST_C22); |
| 154 | mutex_unlock(&gsw->mii_lock); |
| 155 | } |
| 156 | |
| 157 | int mt753x_mmd_read(struct gsw_mt753x *gsw, int addr, int devad, u16 reg) |
| 158 | { |
| 159 | int val; |
| 160 | |
| 161 | if (addr < MT753X_NUM_PHYS) |
| 162 | addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK; |
| 163 | |
| 164 | mutex_lock(&gsw->mii_lock); |
| 165 | mt753x_mii_rw(gsw, addr, devad, reg, MDIO_CMD_ADDR, MDIO_ST_C45); |
| 166 | val = mt753x_mii_rw(gsw, addr, devad, 0, MDIO_CMD_READ_C45, |
| 167 | MDIO_ST_C45); |
| 168 | mutex_unlock(&gsw->mii_lock); |
| 169 | |
| 170 | return val; |
| 171 | } |
| 172 | |
| 173 | void mt753x_mmd_write(struct gsw_mt753x *gsw, int addr, int devad, u16 reg, |
| 174 | u16 val) |
| 175 | { |
| 176 | if (addr < MT753X_NUM_PHYS) |
| 177 | addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK; |
| 178 | |
| 179 | mutex_lock(&gsw->mii_lock); |
| 180 | mt753x_mii_rw(gsw, addr, devad, reg, MDIO_CMD_ADDR, MDIO_ST_C45); |
| 181 | mt753x_mii_rw(gsw, addr, devad, val, MDIO_CMD_WRITE, MDIO_ST_C45); |
| 182 | mutex_unlock(&gsw->mii_lock); |
| 183 | } |
| 184 | |
| 185 | int mt753x_mmd_ind_read(struct gsw_mt753x *gsw, int addr, int devad, u16 reg) |
| 186 | { |
| 187 | u16 val; |
| 188 | |
| 189 | if (addr < MT753X_NUM_PHYS) |
| 190 | addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK; |
| 191 | |
| 192 | mutex_lock(&gsw->mii_lock); |
| 193 | |
| 194 | mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG, |
| 195 | (MMD_ADDR << MMD_CMD_S) | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 196 | ((devad << MMD_DEVAD_S) & MMD_DEVAD_M), |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 197 | MDIO_CMD_WRITE, MDIO_ST_C22); |
| 198 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 199 | mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, reg, MDIO_CMD_WRITE, |
| 200 | MDIO_ST_C22); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 201 | |
| 202 | mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG, |
| 203 | (MMD_DATA << MMD_CMD_S) | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 204 | ((devad << MMD_DEVAD_S) & MMD_DEVAD_M), |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 205 | MDIO_CMD_WRITE, MDIO_ST_C22); |
| 206 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 207 | val = mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, 0, MDIO_CMD_READ, |
| 208 | MDIO_ST_C22); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 209 | |
| 210 | mutex_unlock(&gsw->mii_lock); |
| 211 | |
| 212 | return val; |
| 213 | } |
| 214 | |
| 215 | void mt753x_mmd_ind_write(struct gsw_mt753x *gsw, int addr, int devad, u16 reg, |
| 216 | u16 val) |
| 217 | { |
| 218 | if (addr < MT753X_NUM_PHYS) |
| 219 | addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK; |
| 220 | |
| 221 | mutex_lock(&gsw->mii_lock); |
| 222 | |
| 223 | mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG, |
| 224 | (MMD_ADDR << MMD_CMD_S) | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 225 | ((devad << MMD_DEVAD_S) & MMD_DEVAD_M), |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 226 | MDIO_CMD_WRITE, MDIO_ST_C22); |
| 227 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 228 | mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, reg, MDIO_CMD_WRITE, |
| 229 | MDIO_ST_C22); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 230 | |
| 231 | mt753x_mii_rw(gsw, addr, MII_MMD_ACC_CTL_REG, |
| 232 | (MMD_DATA << MMD_CMD_S) | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 233 | ((devad << MMD_DEVAD_S) & MMD_DEVAD_M), |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 234 | MDIO_CMD_WRITE, MDIO_ST_C22); |
| 235 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 236 | mt753x_mii_rw(gsw, addr, MII_MMD_ADDR_DATA_REG, val, MDIO_CMD_WRITE, |
| 237 | MDIO_ST_C22); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 238 | |
| 239 | mutex_unlock(&gsw->mii_lock); |
| 240 | } |
| 241 | |
| 242 | static inline int mt753x_get_duplex(const struct device_node *np) |
| 243 | { |
| 244 | return of_property_read_bool(np, "full-duplex"); |
| 245 | } |
| 246 | |
| 247 | static void mt753x_load_port_cfg(struct gsw_mt753x *gsw) |
| 248 | { |
| 249 | struct device_node *port_np; |
| 250 | struct device_node *fixed_link_node; |
| 251 | struct mt753x_port_cfg *port_cfg; |
| 252 | u32 port; |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 253 | int ret; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 254 | |
| 255 | for_each_child_of_node(gsw->dev->of_node, port_np) { |
| 256 | if (!of_device_is_compatible(port_np, "mediatek,mt753x-port")) |
| 257 | continue; |
| 258 | |
| 259 | if (!of_device_is_available(port_np)) |
| 260 | continue; |
| 261 | |
| 262 | if (of_property_read_u32(port_np, "reg", &port)) |
| 263 | continue; |
| 264 | |
| 265 | switch (port) { |
| 266 | case 5: |
| 267 | port_cfg = &gsw->port5_cfg; |
| 268 | break; |
| 269 | case 6: |
| 270 | port_cfg = &gsw->port6_cfg; |
| 271 | break; |
| 272 | default: |
| 273 | continue; |
| 274 | } |
| 275 | |
| 276 | if (port_cfg->enabled) { |
| 277 | dev_info(gsw->dev, "duplicated node for port%d\n", |
| 278 | port_cfg->phy_mode); |
| 279 | continue; |
| 280 | } |
| 281 | |
| 282 | port_cfg->np = port_np; |
| 283 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 284 | ret = of_get_phy_mode(port_cfg->np); |
| 285 | if (ret < 0) { |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 286 | dev_info(gsw->dev, "incorrect phy-mode %d\n", port); |
| 287 | continue; |
| 288 | } |
| 289 | |
| 290 | fixed_link_node = of_get_child_by_name(port_np, "fixed-link"); |
| 291 | if (fixed_link_node) { |
| 292 | u32 speed; |
| 293 | |
| 294 | port_cfg->force_link = 1; |
| 295 | port_cfg->duplex = mt753x_get_duplex(fixed_link_node); |
| 296 | |
| 297 | if (of_property_read_u32(fixed_link_node, "speed", |
| 298 | &speed)) { |
| 299 | speed = 0; |
| 300 | continue; |
| 301 | } |
| 302 | |
| 303 | of_node_put(fixed_link_node); |
| 304 | |
| 305 | switch (speed) { |
| 306 | case 10: |
| 307 | port_cfg->speed = MAC_SPD_10; |
| 308 | break; |
| 309 | case 100: |
| 310 | port_cfg->speed = MAC_SPD_100; |
| 311 | break; |
| 312 | case 1000: |
| 313 | port_cfg->speed = MAC_SPD_1000; |
| 314 | break; |
| 315 | case 2500: |
| 316 | port_cfg->speed = MAC_SPD_2500; |
| 317 | break; |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 318 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 319 | default: |
| 320 | dev_info(gsw->dev, "incorrect speed %d\n", |
| 321 | speed); |
| 322 | continue; |
| 323 | } |
| 324 | } |
| 325 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 326 | port_cfg->ssc_on = |
| 327 | of_property_read_bool(port_cfg->np, "mediatek,ssc-on"); |
| 328 | port_cfg->stag_on = |
| 329 | of_property_read_bool(port_cfg->np, "mediatek,stag-on"); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 330 | port_cfg->enabled = 1; |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | void mt753x_tr_write(struct gsw_mt753x *gsw, int addr, u8 ch, u8 node, u8 daddr, |
| 335 | u32 data) |
| 336 | { |
| 337 | ktime_t timeout; |
| 338 | u32 timeout_us; |
| 339 | u32 val; |
| 340 | |
| 341 | if (addr < MT753X_NUM_PHYS) |
| 342 | addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK; |
| 343 | |
| 344 | gsw->mii_write(gsw, addr, PHY_CL22_PAGE_CTRL, PHY_TR_PAGE); |
| 345 | |
| 346 | val = gsw->mii_read(gsw, addr, PHY_TR_CTRL); |
| 347 | |
| 348 | timeout_us = 100000; |
| 349 | timeout = ktime_add_us(ktime_get(), timeout_us); |
| 350 | while (1) { |
| 351 | val = gsw->mii_read(gsw, addr, PHY_TR_CTRL); |
| 352 | |
| 353 | if (!!(val & PHY_TR_PKT_XMT_STA)) |
| 354 | break; |
| 355 | |
| 356 | if (ktime_compare(ktime_get(), timeout) > 0) |
| 357 | goto out; |
| 358 | } |
| 359 | |
| 360 | gsw->mii_write(gsw, addr, PHY_TR_LOW_DATA, PHY_TR_LOW_VAL(data)); |
| 361 | gsw->mii_write(gsw, addr, PHY_TR_HIGH_DATA, PHY_TR_HIGH_VAL(data)); |
| 362 | val = PHY_TR_PKT_XMT_STA | (PHY_TR_WRITE << PHY_TR_WR_S) | |
| 363 | (ch << PHY_TR_CH_ADDR_S) | (node << PHY_TR_NODE_ADDR_S) | |
| 364 | (daddr << PHY_TR_DATA_ADDR_S); |
| 365 | gsw->mii_write(gsw, addr, PHY_TR_CTRL, val); |
| 366 | |
| 367 | timeout_us = 100000; |
| 368 | timeout = ktime_add_us(ktime_get(), timeout_us); |
| 369 | while (1) { |
| 370 | val = gsw->mii_read(gsw, addr, PHY_TR_CTRL); |
| 371 | |
| 372 | if (!!(val & PHY_TR_PKT_XMT_STA)) |
| 373 | break; |
| 374 | |
| 375 | if (ktime_compare(ktime_get(), timeout) > 0) |
| 376 | goto out; |
| 377 | } |
| 378 | out: |
| 379 | gsw->mii_write(gsw, addr, PHY_CL22_PAGE_CTRL, 0); |
| 380 | } |
| 381 | |
| 382 | int mt753x_tr_read(struct gsw_mt753x *gsw, int addr, u8 ch, u8 node, u8 daddr) |
| 383 | { |
| 384 | ktime_t timeout; |
| 385 | u32 timeout_us; |
| 386 | u32 val; |
| 387 | u8 val_h; |
| 388 | |
| 389 | if (addr < MT753X_NUM_PHYS) |
| 390 | addr = (gsw->phy_base + addr) & MT753X_SMI_ADDR_MASK; |
| 391 | |
| 392 | gsw->mii_write(gsw, addr, PHY_CL22_PAGE_CTRL, PHY_TR_PAGE); |
| 393 | |
| 394 | val = gsw->mii_read(gsw, addr, PHY_TR_CTRL); |
| 395 | |
| 396 | timeout_us = 100000; |
| 397 | timeout = ktime_add_us(ktime_get(), timeout_us); |
| 398 | while (1) { |
| 399 | val = gsw->mii_read(gsw, addr, PHY_TR_CTRL); |
| 400 | |
| 401 | if (!!(val & PHY_TR_PKT_XMT_STA)) |
| 402 | break; |
| 403 | |
| 404 | if (ktime_compare(ktime_get(), timeout) > 0) { |
| 405 | gsw->mii_write(gsw, addr, PHY_CL22_PAGE_CTRL, 0); |
| 406 | return -ETIMEDOUT; |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | val = PHY_TR_PKT_XMT_STA | (PHY_TR_READ << PHY_TR_WR_S) | |
| 411 | (ch << PHY_TR_CH_ADDR_S) | (node << PHY_TR_NODE_ADDR_S) | |
| 412 | (daddr << PHY_TR_DATA_ADDR_S); |
| 413 | gsw->mii_write(gsw, addr, PHY_TR_CTRL, val); |
| 414 | |
| 415 | timeout_us = 100000; |
| 416 | timeout = ktime_add_us(ktime_get(), timeout_us); |
| 417 | while (1) { |
| 418 | val = gsw->mii_read(gsw, addr, PHY_TR_CTRL); |
| 419 | |
| 420 | if (!!(val & PHY_TR_PKT_XMT_STA)) |
| 421 | break; |
| 422 | |
| 423 | if (ktime_compare(ktime_get(), timeout) > 0) { |
| 424 | gsw->mii_write(gsw, addr, PHY_CL22_PAGE_CTRL, 0); |
| 425 | return -ETIMEDOUT; |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | val = gsw->mii_read(gsw, addr, PHY_TR_LOW_DATA); |
| 430 | val_h = gsw->mii_read(gsw, addr, PHY_TR_HIGH_DATA); |
| 431 | val |= (val_h << 16); |
| 432 | |
| 433 | gsw->mii_write(gsw, addr, PHY_CL22_PAGE_CTRL, 0); |
| 434 | |
| 435 | return val; |
| 436 | } |
| 437 | |
| 438 | static void mt753x_add_gsw(struct gsw_mt753x *gsw) |
| 439 | { |
| 440 | mutex_lock(&mt753x_devs_lock); |
| 441 | gsw->id = mt753x_id++; |
| 442 | INIT_LIST_HEAD(&gsw->list); |
| 443 | list_add_tail(&gsw->list, &mt753x_devs); |
| 444 | mutex_unlock(&mt753x_devs_lock); |
| 445 | } |
| 446 | |
| 447 | static void mt753x_remove_gsw(struct gsw_mt753x *gsw) |
| 448 | { |
| 449 | mutex_lock(&mt753x_devs_lock); |
| 450 | list_del(&gsw->list); |
| 451 | mutex_unlock(&mt753x_devs_lock); |
| 452 | } |
| 453 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 454 | struct gsw_mt753x *mt753x_get_gsw(u32 id) |
| 455 | { |
| 456 | struct gsw_mt753x *dev; |
| 457 | |
| 458 | mutex_lock(&mt753x_devs_lock); |
| 459 | |
| 460 | list_for_each_entry(dev, &mt753x_devs, list) { |
| 461 | if (dev->id == id) |
| 462 | return dev; |
| 463 | } |
| 464 | |
| 465 | mutex_unlock(&mt753x_devs_lock); |
| 466 | |
| 467 | return NULL; |
| 468 | } |
| 469 | |
| 470 | struct gsw_mt753x *mt753x_get_first_gsw(void) |
| 471 | { |
| 472 | struct gsw_mt753x *dev; |
| 473 | |
| 474 | mutex_lock(&mt753x_devs_lock); |
| 475 | |
| 476 | list_for_each_entry(dev, &mt753x_devs, list) |
| 477 | return dev; |
| 478 | |
| 479 | mutex_unlock(&mt753x_devs_lock); |
| 480 | |
| 481 | return NULL; |
| 482 | } |
| 483 | |
| 484 | void mt753x_put_gsw(void) |
| 485 | { |
| 486 | mutex_unlock(&mt753x_devs_lock); |
| 487 | } |
| 488 | |
| 489 | void mt753x_lock_gsw(void) |
| 490 | { |
| 491 | mutex_lock(&mt753x_devs_lock); |
| 492 | } |
| 493 | |
| 494 | static int mt753x_hw_reset(struct gsw_mt753x *gsw) |
| 495 | { |
| 496 | struct device_node *np = gsw->dev->of_node; |
| 497 | struct reset_control *rstc; |
| 498 | int mcm; |
| 499 | int ret = -EINVAL; |
| 500 | |
| 501 | mcm = of_property_read_bool(np, "mediatek,mcm"); |
| 502 | if (mcm) { |
| 503 | rstc = devm_reset_control_get(gsw->dev, "mcm"); |
| 504 | ret = IS_ERR(rstc); |
| 505 | if (IS_ERR(rstc)) { |
| 506 | dev_err(gsw->dev, "Missing reset ctrl of switch\n"); |
| 507 | return ret; |
| 508 | } |
| 509 | |
| 510 | reset_control_assert(rstc); |
| 511 | msleep(30); |
| 512 | reset_control_deassert(rstc); |
| 513 | |
| 514 | gsw->reset_pin = -1; |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | gsw->reset_pin = of_get_named_gpio(np, "reset-gpios", 0); |
| 519 | if (gsw->reset_pin < 0) { |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 520 | dev_info(gsw->dev, "No reset pin of switch\n"); |
| 521 | return 0; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | ret = devm_gpio_request(gsw->dev, gsw->reset_pin, "mt753x-reset"); |
| 525 | if (ret) { |
| 526 | dev_info(gsw->dev, "Failed to request gpio %d\n", |
| 527 | gsw->reset_pin); |
| 528 | return ret; |
| 529 | } |
| 530 | |
| 531 | gpio_direction_output(gsw->reset_pin, 0); |
| 532 | msleep(30); |
| 533 | gpio_set_value(gsw->reset_pin, 1); |
| 534 | msleep(500); |
| 535 | |
| 536 | return 0; |
| 537 | } |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 538 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 539 | static int mt753x_mdio_read(struct mii_bus *bus, int addr, int reg) |
| 540 | { |
| 541 | struct gsw_mt753x *gsw = bus->priv; |
| 542 | |
| 543 | return gsw->mii_read(gsw, addr, reg); |
| 544 | } |
| 545 | |
| 546 | static int mt753x_mdio_write(struct mii_bus *bus, int addr, int reg, u16 val) |
| 547 | { |
| 548 | struct gsw_mt753x *gsw = bus->priv; |
| 549 | |
| 550 | gsw->mii_write(gsw, addr, reg, val); |
| 551 | |
| 552 | return 0; |
| 553 | } |
| 554 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 555 | static const struct net_device_ops mt753x_dummy_netdev_ops = {}; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 556 | |
| 557 | static void mt753x_phy_link_handler(struct net_device *dev) |
| 558 | { |
| 559 | struct mt753x_phy *phy = container_of(dev, struct mt753x_phy, netdev); |
| 560 | struct phy_device *phydev = phy->phydev; |
| 561 | struct gsw_mt753x *gsw = phy->gsw; |
| 562 | u32 port = phy - gsw->phys; |
| 563 | |
| 564 | if (phydev->link) { |
| 565 | dev_info(gsw->dev, |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 566 | "Port %d Link is Up - %s/%s - flow control %s\n", port, |
| 567 | phy_speed_to_str(phydev->speed), |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 568 | (phydev->duplex == DUPLEX_FULL) ? "Full" : "Half", |
| 569 | phydev->pause ? "rx/tx" : "off"); |
| 570 | } else { |
| 571 | dev_info(gsw->dev, "Port %d Link is Down\n", port); |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | static void mt753x_connect_internal_phys(struct gsw_mt753x *gsw, |
| 576 | struct device_node *mii_np) |
| 577 | { |
| 578 | struct device_node *phy_np; |
| 579 | struct mt753x_phy *phy; |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 580 | phy_interface_t iface; |
| 581 | int ret; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 582 | u32 phyad; |
| 583 | |
| 584 | if (!mii_np) |
| 585 | return; |
| 586 | |
| 587 | for_each_child_of_node(mii_np, phy_np) { |
| 588 | if (of_property_read_u32(phy_np, "reg", &phyad)) |
| 589 | continue; |
| 590 | |
| 591 | if (phyad >= MT753X_NUM_PHYS) |
| 592 | continue; |
| 593 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 594 | ret = of_get_phy_mode(phy_np); |
| 595 | if (ret < 0) { |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 596 | dev_info(gsw->dev, "incorrect phy-mode %d for PHY %d\n", |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 597 | iface, phyad); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 598 | continue; |
| 599 | } |
| 600 | |
| 601 | phy = &gsw->phys[phyad]; |
| 602 | phy->gsw = gsw; |
| 603 | |
| 604 | init_dummy_netdev(&phy->netdev); |
| 605 | phy->netdev.netdev_ops = &mt753x_dummy_netdev_ops; |
| 606 | |
| 607 | phy->phydev = of_phy_connect(&phy->netdev, phy_np, |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 608 | mt753x_phy_link_handler, 0, iface); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 609 | if (!phy->phydev) { |
| 610 | dev_info(gsw->dev, "could not connect to PHY %d\n", |
| 611 | phyad); |
| 612 | continue; |
| 613 | } |
| 614 | |
| 615 | phy_start(phy->phydev); |
| 616 | } |
| 617 | } |
| 618 | |
| 619 | static void mt753x_disconnect_internal_phys(struct gsw_mt753x *gsw) |
| 620 | { |
| 621 | int i; |
| 622 | |
| 623 | for (i = 0; i < ARRAY_SIZE(gsw->phys); i++) { |
| 624 | if (gsw->phys[i].phydev) { |
| 625 | phy_stop(gsw->phys[i].phydev); |
| 626 | phy_disconnect(gsw->phys[i].phydev); |
| 627 | gsw->phys[i].phydev = NULL; |
| 628 | } |
| 629 | } |
| 630 | } |
| 631 | |
| 632 | static int mt753x_mdio_register(struct gsw_mt753x *gsw) |
| 633 | { |
| 634 | struct device_node *mii_np; |
| 635 | int i, ret; |
| 636 | |
| 637 | mii_np = of_get_child_by_name(gsw->dev->of_node, "mdio-bus"); |
| 638 | if (mii_np && !of_device_is_available(mii_np)) { |
| 639 | ret = -ENODEV; |
| 640 | goto err_put_node; |
| 641 | } |
| 642 | |
| 643 | gsw->gphy_bus = devm_mdiobus_alloc(gsw->dev); |
| 644 | if (!gsw->gphy_bus) { |
| 645 | ret = -ENOMEM; |
| 646 | goto err_put_node; |
| 647 | } |
| 648 | |
| 649 | gsw->gphy_bus->name = "mt753x_mdio"; |
| 650 | gsw->gphy_bus->read = mt753x_mdio_read; |
| 651 | gsw->gphy_bus->write = mt753x_mdio_write; |
| 652 | gsw->gphy_bus->priv = gsw; |
| 653 | gsw->gphy_bus->parent = gsw->dev; |
| 654 | gsw->gphy_bus->phy_mask = BIT(MT753X_NUM_PHYS) - 1; |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 655 | // gsw->gphy_bus->irq = gsw->phy_irqs; |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 656 | |
| 657 | for (i = 0; i < PHY_MAX_ADDR; i++) |
| 658 | gsw->gphy_bus->irq[i] = PHY_POLL; |
| 659 | |
| 660 | if (mii_np) |
| 661 | snprintf(gsw->gphy_bus->id, MII_BUS_ID_SIZE, "%s@%s", |
| 662 | mii_np->name, gsw->dev->of_node->name); |
| 663 | else |
| 664 | snprintf(gsw->gphy_bus->id, MII_BUS_ID_SIZE, "mdio@%s", |
| 665 | gsw->dev->of_node->name); |
| 666 | |
| 667 | ret = of_mdiobus_register(gsw->gphy_bus, mii_np); |
| 668 | |
| 669 | if (ret) { |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 670 | gsw->gphy_bus = NULL; |
| 671 | } else { |
| 672 | if (gsw->phy_status_poll) |
| 673 | mt753x_connect_internal_phys(gsw, mii_np); |
| 674 | } |
| 675 | |
| 676 | err_put_node: |
| 677 | if (mii_np) |
| 678 | of_node_put(mii_np); |
| 679 | |
| 680 | return ret; |
| 681 | } |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 682 | |
| 683 | static irqreturn_t mt753x_irq_handler(int irq, void *dev) |
| 684 | { |
| 685 | struct gsw_mt753x *gsw = dev; |
| 686 | |
| 687 | disable_irq_nosync(gsw->irq); |
| 688 | |
| 689 | schedule_work(&gsw->irq_worker); |
| 690 | |
| 691 | return IRQ_HANDLED; |
| 692 | } |
| 693 | |
| 694 | static int mt753x_probe(struct platform_device *pdev) |
| 695 | { |
| 696 | struct gsw_mt753x *gsw; |
| 697 | struct mt753x_sw_id *sw; |
| 698 | struct device_node *np = pdev->dev.of_node; |
| 699 | struct device_node *mdio; |
| 700 | struct mii_bus *mdio_bus; |
| 701 | int ret = -EINVAL; |
| 702 | struct chip_rev rev; |
| 703 | struct mt753x_mapping *map; |
| 704 | int i; |
| 705 | |
| 706 | mdio = of_parse_phandle(np, "mediatek,mdio", 0); |
| 707 | if (!mdio) |
| 708 | return -EINVAL; |
| 709 | |
| 710 | mdio_bus = of_mdio_find_bus(mdio); |
| 711 | if (!mdio_bus) |
| 712 | return -EPROBE_DEFER; |
| 713 | |
| 714 | gsw = devm_kzalloc(&pdev->dev, sizeof(struct gsw_mt753x), GFP_KERNEL); |
| 715 | if (!gsw) |
| 716 | return -ENOMEM; |
| 717 | |
| 718 | gsw->host_bus = mdio_bus; |
| 719 | gsw->dev = &pdev->dev; |
| 720 | mutex_init(&gsw->mii_lock); |
| 721 | |
| 722 | /* Switch hard reset */ |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 723 | if (mt753x_hw_reset(gsw)) { |
| 724 | dev_info(&pdev->dev, "reset switch fail.\n"); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 725 | goto fail; |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 726 | } |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 727 | |
| 728 | /* Fetch the SMI address dirst */ |
| 729 | if (of_property_read_u32(np, "mediatek,smi-addr", &gsw->smi_addr)) |
| 730 | gsw->smi_addr = MT753X_DFL_SMI_ADDR; |
| 731 | |
| 732 | /* Get LAN/WAN port mapping */ |
| 733 | map = mt753x_find_mapping(np); |
| 734 | if (map) { |
| 735 | mt753x_apply_mapping(gsw, map); |
| 736 | gsw->global_vlan_enable = 1; |
| 737 | dev_info(gsw->dev, "LAN/WAN VLAN setting=%s\n", map->name); |
| 738 | } |
| 739 | |
| 740 | /* Load MAC port configurations */ |
| 741 | mt753x_load_port_cfg(gsw); |
| 742 | |
| 743 | /* Check for valid switch and then initialize */ |
| 744 | for (i = 0; i < ARRAY_SIZE(mt753x_sw_ids); i++) { |
| 745 | if (!mt753x_sw_ids[i]->detect(gsw, &rev)) { |
| 746 | sw = mt753x_sw_ids[i]; |
| 747 | |
| 748 | gsw->name = rev.name; |
| 749 | gsw->model = sw->model; |
| 750 | |
| 751 | dev_info(gsw->dev, "Switch is MediaTek %s rev %d", |
| 752 | gsw->name, rev.rev); |
| 753 | |
| 754 | /* Initialize the switch */ |
| 755 | ret = sw->init(gsw); |
| 756 | if (ret) |
| 757 | goto fail; |
| 758 | |
| 759 | break; |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | if (i >= ARRAY_SIZE(mt753x_sw_ids)) { |
| 764 | dev_err(gsw->dev, "No mt753x switch found\n"); |
| 765 | goto fail; |
| 766 | } |
| 767 | |
| 768 | gsw->irq = platform_get_irq(pdev, 0); |
| 769 | if (gsw->irq >= 0) { |
| 770 | ret = devm_request_irq(gsw->dev, gsw->irq, mt753x_irq_handler, |
| 771 | 0, dev_name(gsw->dev), gsw); |
| 772 | if (ret) { |
| 773 | dev_err(gsw->dev, "Failed to request irq %d\n", |
| 774 | gsw->irq); |
| 775 | goto fail; |
| 776 | } |
| 777 | |
| 778 | INIT_WORK(&gsw->irq_worker, mt753x_irq_worker); |
| 779 | } |
| 780 | |
| 781 | platform_set_drvdata(pdev, gsw); |
| 782 | |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 783 | gsw->phy_status_poll = |
| 784 | of_property_read_bool(gsw->dev->of_node, "mediatek,phy-poll"); |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 785 | |
| 786 | mt753x_add_gsw(gsw); |
| 787 | #if 1 //XDXD |
| 788 | mt753x_mdio_register(gsw); |
| 789 | #endif |
| 790 | |
developer | 5145ebb | 2022-07-14 15:16:24 +0800 | [diff] [blame] | 791 | mt753x_nl_init(); |
| 792 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 793 | mt753x_swconfig_init(gsw); |
| 794 | |
| 795 | if (sw->post_init) |
| 796 | sw->post_init(gsw); |
| 797 | |
| 798 | if (gsw->irq >= 0) |
| 799 | mt753x_irq_enable(gsw); |
| 800 | |
| 801 | return 0; |
| 802 | |
| 803 | fail: |
| 804 | devm_kfree(&pdev->dev, gsw); |
| 805 | |
| 806 | return ret; |
| 807 | } |
| 808 | |
| 809 | static int mt753x_remove(struct platform_device *pdev) |
| 810 | { |
| 811 | struct gsw_mt753x *gsw = platform_get_drvdata(pdev); |
| 812 | |
| 813 | if (gsw->irq >= 0) |
| 814 | cancel_work_sync(&gsw->irq_worker); |
| 815 | |
| 816 | if (gsw->reset_pin >= 0) |
| 817 | devm_gpio_free(&pdev->dev, gsw->reset_pin); |
| 818 | |
| 819 | #ifdef CONFIG_SWCONFIG |
| 820 | mt753x_swconfig_destroy(gsw); |
| 821 | #endif |
| 822 | |
| 823 | #if 1 //XDXD |
| 824 | mt753x_disconnect_internal_phys(gsw); |
| 825 | |
| 826 | mdiobus_unregister(gsw->gphy_bus); |
| 827 | #endif |
| 828 | |
developer | 5145ebb | 2022-07-14 15:16:24 +0800 | [diff] [blame] | 829 | mt753x_nl_exit(); |
| 830 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 831 | mt753x_remove_gsw(gsw); |
| 832 | |
| 833 | platform_set_drvdata(pdev, NULL); |
| 834 | |
| 835 | return 0; |
| 836 | } |
| 837 | |
| 838 | static const struct of_device_id mt753x_ids[] = { |
| 839 | { .compatible = "mediatek,mt753x" }, |
developer | 2cdaeb1 | 2022-10-04 20:25:05 +0800 | [diff] [blame] | 840 | {}, |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 841 | }; |
| 842 | |
| 843 | MODULE_DEVICE_TABLE(of, mt753x_ids); |
| 844 | |
| 845 | static struct platform_driver mt753x_driver = { |
| 846 | .probe = mt753x_probe, |
| 847 | .remove = mt753x_remove, |
| 848 | .driver = { |
| 849 | .name = "mt753x", |
| 850 | .of_match_table = mt753x_ids, |
| 851 | }, |
| 852 | }; |
| 853 | |
| 854 | static int __init mt753x_init(void) |
| 855 | { |
| 856 | int ret; |
| 857 | |
| 858 | INIT_LIST_HEAD(&mt753x_devs); |
| 859 | ret = platform_driver_register(&mt753x_driver); |
| 860 | |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 861 | return ret; |
| 862 | } |
| 863 | module_init(mt753x_init); |
| 864 | |
| 865 | static void __exit mt753x_exit(void) |
| 866 | { |
developer | fd40db2 | 2021-04-29 10:08:25 +0800 | [diff] [blame] | 867 | platform_driver_unregister(&mt753x_driver); |
| 868 | } |
| 869 | module_exit(mt753x_exit); |
| 870 | |
| 871 | MODULE_LICENSE("GPL"); |
| 872 | MODULE_AUTHOR("Weijie Gao <weijie.gao@mediatek.com>"); |
| 873 | MODULE_DESCRIPTION("Driver for MediaTek MT753x Gigabit Switch"); |