1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for Microchip USB251xB USB 2.0 Hi-Speed Hub Controller 4 * Configuration via SMBus. 5 * 6 * Copyright (c) 2017 SKIDATA AG 7 * 8 * This work is based on the USB3503 driver by Dongjin Kim and 9 * a not-accepted patch by Fabien Lahoudere, see: 10 * https://patchwork.kernel.org/patch/9257715/ 11 */ 12 13 #include <linux/delay.h> 14 #include <linux/gpio/consumer.h> 15 #include <linux/i2c.h> 16 #include <linux/module.h> 17 #include <linux/nls.h> 18 #include <linux/of_device.h> 19 #include <linux/slab.h> 20 21 /* Internal Register Set Addresses & Default Values acc. to DS00001692C */ 22 #define USB251XB_ADDR_VENDOR_ID_LSB 0x00 23 #define USB251XB_ADDR_VENDOR_ID_MSB 0x01 24 #define USB251XB_DEF_VENDOR_ID 0x0424 25 26 #define USB251XB_ADDR_PRODUCT_ID_LSB 0x02 27 #define USB251XB_ADDR_PRODUCT_ID_MSB 0x03 28 #define USB251XB_DEF_PRODUCT_ID_12 0x2512 /* USB2512B/12Bi */ 29 #define USB251XB_DEF_PRODUCT_ID_13 0x2513 /* USB2513B/13Bi */ 30 #define USB251XB_DEF_PRODUCT_ID_14 0x2514 /* USB2514B/14Bi */ 31 #define USB251XB_DEF_PRODUCT_ID_17 0x2517 /* USB2517/17i */ 32 33 #define USB251XB_ADDR_DEVICE_ID_LSB 0x04 34 #define USB251XB_ADDR_DEVICE_ID_MSB 0x05 35 #define USB251XB_DEF_DEVICE_ID 0x0BB3 36 37 #define USB251XB_ADDR_CONFIG_DATA_1 0x06 38 #define USB251XB_DEF_CONFIG_DATA_1 0x9B 39 #define USB251XB_ADDR_CONFIG_DATA_2 0x07 40 #define USB251XB_DEF_CONFIG_DATA_2 0x20 41 #define USB251XB_ADDR_CONFIG_DATA_3 0x08 42 #define USB251XB_DEF_CONFIG_DATA_3 0x02 43 44 #define USB251XB_ADDR_NON_REMOVABLE_DEVICES 0x09 45 #define USB251XB_DEF_NON_REMOVABLE_DEVICES 0x00 46 47 #define USB251XB_ADDR_PORT_DISABLE_SELF 0x0A 48 #define USB251XB_DEF_PORT_DISABLE_SELF 0x00 49 #define USB251XB_ADDR_PORT_DISABLE_BUS 0x0B 50 #define USB251XB_DEF_PORT_DISABLE_BUS 0x00 51 52 #define USB251XB_ADDR_MAX_POWER_SELF 0x0C 53 #define USB251XB_DEF_MAX_POWER_SELF 0x01 54 #define USB251XB_ADDR_MAX_POWER_BUS 0x0D 55 #define USB251XB_DEF_MAX_POWER_BUS 0x32 56 57 #define USB251XB_ADDR_MAX_CURRENT_SELF 0x0E 58 #define USB251XB_DEF_MAX_CURRENT_SELF 0x01 59 #define USB251XB_ADDR_MAX_CURRENT_BUS 0x0F 60 #define USB251XB_DEF_MAX_CURRENT_BUS 0x32 61 62 #define USB251XB_ADDR_POWER_ON_TIME 0x10 63 #define USB251XB_DEF_POWER_ON_TIME 0x32 64 65 #define USB251XB_ADDR_LANGUAGE_ID_HIGH 0x11 66 #define USB251XB_ADDR_LANGUAGE_ID_LOW 0x12 67 #define USB251XB_DEF_LANGUAGE_ID 0x0000 68 69 #define USB251XB_STRING_BUFSIZE 62 70 #define USB251XB_ADDR_MANUFACTURER_STRING_LEN 0x13 71 #define USB251XB_ADDR_MANUFACTURER_STRING 0x16 72 #define USB251XB_DEF_MANUFACTURER_STRING "Microchip" 73 74 #define USB251XB_ADDR_PRODUCT_STRING_LEN 0x14 75 #define USB251XB_ADDR_PRODUCT_STRING 0x54 76 #define USB251XB_DEF_PRODUCT_STRING "USB251xB/xBi/7i" 77 78 #define USB251XB_ADDR_SERIAL_STRING_LEN 0x15 79 #define USB251XB_ADDR_SERIAL_STRING 0x92 80 #define USB251XB_DEF_SERIAL_STRING "" 81 82 #define USB251XB_ADDR_BATTERY_CHARGING_ENABLE 0xD0 83 #define USB251XB_DEF_BATTERY_CHARGING_ENABLE 0x00 84 85 #define USB251XB_ADDR_BOOST_UP 0xF6 86 #define USB251XB_DEF_BOOST_UP 0x00 87 #define USB251XB_ADDR_BOOST_57 0xF7 88 #define USB251XB_DEF_BOOST_57 0x00 89 #define USB251XB_ADDR_BOOST_14 0xF8 90 #define USB251XB_DEF_BOOST_14 0x00 91 92 #define USB251XB_ADDR_PORT_SWAP 0xFA 93 #define USB251XB_DEF_PORT_SWAP 0x00 94 95 #define USB251XB_ADDR_PORT_MAP_12 0xFB 96 #define USB251XB_DEF_PORT_MAP_12 0x00 97 #define USB251XB_ADDR_PORT_MAP_34 0xFC 98 #define USB251XB_DEF_PORT_MAP_34 0x00 /* USB251{3B/i,4B/i,7/i} only */ 99 #define USB251XB_ADDR_PORT_MAP_56 0xFD 100 #define USB251XB_DEF_PORT_MAP_56 0x00 /* USB2517/i only */ 101 #define USB251XB_ADDR_PORT_MAP_7 0xFE 102 #define USB251XB_DEF_PORT_MAP_7 0x00 /* USB2517/i only */ 103 104 #define USB251XB_ADDR_STATUS_COMMAND 0xFF 105 #define USB251XB_STATUS_COMMAND_SMBUS_DOWN 0x04 106 #define USB251XB_STATUS_COMMAND_RESET 0x02 107 #define USB251XB_STATUS_COMMAND_ATTACH 0x01 108 109 #define USB251XB_I2C_REG_SZ 0x100 110 #define USB251XB_I2C_WRITE_SZ 0x10 111 112 #define DRIVER_NAME "usb251xb" 113 #define DRIVER_DESC "Microchip USB 2.0 Hi-Speed Hub Controller" 114 115 struct usb251xb { 116 struct device *dev; 117 struct i2c_client *i2c; 118 u8 skip_config; 119 struct gpio_desc *gpio_reset; 120 u16 vendor_id; 121 u16 product_id; 122 u16 device_id; 123 u8 conf_data1; 124 u8 conf_data2; 125 u8 conf_data3; 126 u8 non_rem_dev; 127 u8 port_disable_sp; 128 u8 port_disable_bp; 129 u8 max_power_sp; 130 u8 max_power_bp; 131 u8 max_current_sp; 132 u8 max_current_bp; 133 u8 power_on_time; 134 u16 lang_id; 135 u8 manufacturer_len; 136 u8 product_len; 137 u8 serial_len; 138 char manufacturer[USB251XB_STRING_BUFSIZE]; 139 char product[USB251XB_STRING_BUFSIZE]; 140 char serial[USB251XB_STRING_BUFSIZE]; 141 u8 bat_charge_en; 142 u8 boost_up; 143 u8 boost_57; 144 u8 boost_14; 145 u8 port_swap; 146 u8 port_map12; 147 u8 port_map34; 148 u8 port_map56; 149 u8 port_map7; 150 u8 status; 151 }; 152 153 struct usb251xb_data { 154 u16 product_id; 155 u8 port_cnt; 156 bool led_support; 157 bool bat_support; 158 char product_str[USB251XB_STRING_BUFSIZE / 2]; /* ASCII string */ 159 }; 160 161 static const struct usb251xb_data usb2512b_data = { 162 .product_id = 0x2512, 163 .port_cnt = 2, 164 .led_support = false, 165 .bat_support = true, 166 .product_str = "USB2512B", 167 }; 168 169 static const struct usb251xb_data usb2512bi_data = { 170 .product_id = 0x2512, 171 .port_cnt = 2, 172 .led_support = false, 173 .bat_support = true, 174 .product_str = "USB2512Bi", 175 }; 176 177 static const struct usb251xb_data usb2513b_data = { 178 .product_id = 0x2513, 179 .port_cnt = 3, 180 .led_support = false, 181 .bat_support = true, 182 .product_str = "USB2513B", 183 }; 184 185 static const struct usb251xb_data usb2513bi_data = { 186 .product_id = 0x2513, 187 .port_cnt = 3, 188 .led_support = false, 189 .bat_support = true, 190 .product_str = "USB2513Bi", 191 }; 192 193 static const struct usb251xb_data usb2514b_data = { 194 .product_id = 0x2514, 195 .port_cnt = 4, 196 .led_support = false, 197 .bat_support = true, 198 .product_str = "USB2514B", 199 }; 200 201 static const struct usb251xb_data usb2514bi_data = { 202 .product_id = 0x2514, 203 .port_cnt = 4, 204 .led_support = false, 205 .bat_support = true, 206 .product_str = "USB2514Bi", 207 }; 208 209 static const struct usb251xb_data usb2517_data = { 210 .product_id = 0x2517, 211 .port_cnt = 7, 212 .led_support = true, 213 .bat_support = false, 214 .product_str = "USB2517", 215 }; 216 217 static const struct usb251xb_data usb2517i_data = { 218 .product_id = 0x2517, 219 .port_cnt = 7, 220 .led_support = true, 221 .bat_support = false, 222 .product_str = "USB2517i", 223 }; 224 225 static void usb251xb_reset(struct usb251xb *hub, int state) 226 { 227 if (!hub->gpio_reset) 228 return; 229 230 gpiod_set_value_cansleep(hub->gpio_reset, state); 231 232 /* wait for hub recovery/stabilization */ 233 if (!state) 234 usleep_range(500, 750); /* >=500us at power on */ 235 else 236 usleep_range(1, 10); /* >=1us at power down */ 237 } 238 239 static int usb251xb_connect(struct usb251xb *hub) 240 { 241 struct device *dev = hub->dev; 242 int err, i; 243 char i2c_wb[USB251XB_I2C_REG_SZ]; 244 245 memset(i2c_wb, 0, USB251XB_I2C_REG_SZ); 246 247 if (hub->skip_config) { 248 dev_info(dev, "Skip hub configuration, only attach.\n"); 249 i2c_wb[0] = 0x01; 250 i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH; 251 252 usb251xb_reset(hub, 0); 253 254 err = i2c_smbus_write_i2c_block_data(hub->i2c, 255 USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb); 256 if (err) { 257 dev_err(dev, "attaching hub failed: %d\n", err); 258 return err; 259 } 260 return 0; 261 } 262 263 i2c_wb[USB251XB_ADDR_VENDOR_ID_MSB] = (hub->vendor_id >> 8) & 0xFF; 264 i2c_wb[USB251XB_ADDR_VENDOR_ID_LSB] = hub->vendor_id & 0xFF; 265 i2c_wb[USB251XB_ADDR_PRODUCT_ID_MSB] = (hub->product_id >> 8) & 0xFF; 266 i2c_wb[USB251XB_ADDR_PRODUCT_ID_LSB] = hub->product_id & 0xFF; 267 i2c_wb[USB251XB_ADDR_DEVICE_ID_MSB] = (hub->device_id >> 8) & 0xFF; 268 i2c_wb[USB251XB_ADDR_DEVICE_ID_LSB] = hub->device_id & 0xFF; 269 i2c_wb[USB251XB_ADDR_CONFIG_DATA_1] = hub->conf_data1; 270 i2c_wb[USB251XB_ADDR_CONFIG_DATA_2] = hub->conf_data2; 271 i2c_wb[USB251XB_ADDR_CONFIG_DATA_3] = hub->conf_data3; 272 i2c_wb[USB251XB_ADDR_NON_REMOVABLE_DEVICES] = hub->non_rem_dev; 273 i2c_wb[USB251XB_ADDR_PORT_DISABLE_SELF] = hub->port_disable_sp; 274 i2c_wb[USB251XB_ADDR_PORT_DISABLE_BUS] = hub->port_disable_bp; 275 i2c_wb[USB251XB_ADDR_MAX_POWER_SELF] = hub->max_power_sp; 276 i2c_wb[USB251XB_ADDR_MAX_POWER_BUS] = hub->max_power_bp; 277 i2c_wb[USB251XB_ADDR_MAX_CURRENT_SELF] = hub->max_current_sp; 278 i2c_wb[USB251XB_ADDR_MAX_CURRENT_BUS] = hub->max_current_bp; 279 i2c_wb[USB251XB_ADDR_POWER_ON_TIME] = hub->power_on_time; 280 i2c_wb[USB251XB_ADDR_LANGUAGE_ID_HIGH] = (hub->lang_id >> 8) & 0xFF; 281 i2c_wb[USB251XB_ADDR_LANGUAGE_ID_LOW] = hub->lang_id & 0xFF; 282 i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING_LEN] = hub->manufacturer_len; 283 i2c_wb[USB251XB_ADDR_PRODUCT_STRING_LEN] = hub->product_len; 284 i2c_wb[USB251XB_ADDR_SERIAL_STRING_LEN] = hub->serial_len; 285 memcpy(&i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING], hub->manufacturer, 286 USB251XB_STRING_BUFSIZE); 287 memcpy(&i2c_wb[USB251XB_ADDR_SERIAL_STRING], hub->serial, 288 USB251XB_STRING_BUFSIZE); 289 memcpy(&i2c_wb[USB251XB_ADDR_PRODUCT_STRING], hub->product, 290 USB251XB_STRING_BUFSIZE); 291 i2c_wb[USB251XB_ADDR_BATTERY_CHARGING_ENABLE] = hub->bat_charge_en; 292 i2c_wb[USB251XB_ADDR_BOOST_UP] = hub->boost_up; 293 i2c_wb[USB251XB_ADDR_BOOST_57] = hub->boost_57; 294 i2c_wb[USB251XB_ADDR_BOOST_14] = hub->boost_14; 295 i2c_wb[USB251XB_ADDR_PORT_SWAP] = hub->port_swap; 296 i2c_wb[USB251XB_ADDR_PORT_MAP_12] = hub->port_map12; 297 i2c_wb[USB251XB_ADDR_PORT_MAP_34] = hub->port_map34; 298 i2c_wb[USB251XB_ADDR_PORT_MAP_56] = hub->port_map56; 299 i2c_wb[USB251XB_ADDR_PORT_MAP_7] = hub->port_map7; 300 i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH; 301 302 usb251xb_reset(hub, 0); 303 304 /* write registers */ 305 for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) { 306 int offset = i * USB251XB_I2C_WRITE_SZ; 307 char wbuf[USB251XB_I2C_WRITE_SZ + 1]; 308 309 /* The first data byte transferred tells the hub how many data 310 * bytes will follow (byte count). 311 */ 312 wbuf[0] = USB251XB_I2C_WRITE_SZ; 313 memcpy(&wbuf[1], &i2c_wb[offset], USB251XB_I2C_WRITE_SZ); 314 315 dev_dbg(dev, "writing %d byte block %d to 0x%02X\n", 316 USB251XB_I2C_WRITE_SZ, i, offset); 317 318 err = i2c_smbus_write_i2c_block_data(hub->i2c, offset, 319 USB251XB_I2C_WRITE_SZ + 1, 320 wbuf); 321 if (err) 322 goto out_err; 323 } 324 325 dev_info(dev, "Hub configuration was successful.\n"); 326 return 0; 327 328 out_err: 329 dev_err(dev, "configuring block %d failed: %d\n", i, err); 330 return err; 331 } 332 333 #ifdef CONFIG_OF 334 static int usb251xb_get_ofdata(struct usb251xb *hub, 335 struct usb251xb_data *data) 336 { 337 struct device *dev = hub->dev; 338 struct device_node *np = dev->of_node; 339 int len, err, i; 340 u32 port, property_u32 = 0; 341 const u32 *cproperty_u32; 342 const char *cproperty_char; 343 char str[USB251XB_STRING_BUFSIZE / 2]; 344 struct property *prop; 345 const __be32 *p; 346 347 if (!np) { 348 dev_err(dev, "failed to get ofdata\n"); 349 return -ENODEV; 350 } 351 352 if (of_get_property(np, "skip-config", NULL)) 353 hub->skip_config = 1; 354 else 355 hub->skip_config = 0; 356 357 hub->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); 358 if (PTR_ERR(hub->gpio_reset) == -EPROBE_DEFER) { 359 return -EPROBE_DEFER; 360 } else if (IS_ERR(hub->gpio_reset)) { 361 err = PTR_ERR(hub->gpio_reset); 362 dev_err(dev, "unable to request GPIO reset pin (%d)\n", err); 363 return err; 364 } 365 366 if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1)) 367 hub->vendor_id = USB251XB_DEF_VENDOR_ID; 368 369 if (of_property_read_u16_array(np, "product-id", 370 &hub->product_id, 1)) 371 hub->product_id = data->product_id; 372 373 if (of_property_read_u16_array(np, "device-id", &hub->device_id, 1)) 374 hub->device_id = USB251XB_DEF_DEVICE_ID; 375 376 hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1; 377 if (of_get_property(np, "self-powered", NULL)) { 378 hub->conf_data1 |= BIT(7); 379 380 /* Configure Over-Current sens when self-powered */ 381 hub->conf_data1 &= ~BIT(2); 382 if (of_get_property(np, "ganged-sensing", NULL)) 383 hub->conf_data1 &= ~BIT(1); 384 else if (of_get_property(np, "individual-sensing", NULL)) 385 hub->conf_data1 |= BIT(1); 386 } else if (of_get_property(np, "bus-powered", NULL)) { 387 hub->conf_data1 &= ~BIT(7); 388 389 /* Disable Over-Current sense when bus-powered */ 390 hub->conf_data1 |= BIT(2); 391 } 392 393 if (of_get_property(np, "disable-hi-speed", NULL)) 394 hub->conf_data1 |= BIT(5); 395 396 if (of_get_property(np, "multi-tt", NULL)) 397 hub->conf_data1 |= BIT(4); 398 else if (of_get_property(np, "single-tt", NULL)) 399 hub->conf_data1 &= ~BIT(4); 400 401 if (of_get_property(np, "disable-eop", NULL)) 402 hub->conf_data1 |= BIT(3); 403 404 if (of_get_property(np, "individual-port-switching", NULL)) 405 hub->conf_data1 |= BIT(0); 406 else if (of_get_property(np, "ganged-port-switching", NULL)) 407 hub->conf_data1 &= ~BIT(0); 408 409 hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2; 410 if (of_get_property(np, "dynamic-power-switching", NULL)) 411 hub->conf_data2 |= BIT(7); 412 413 if (!of_property_read_u32(np, "oc-delay-us", &property_u32)) { 414 if (property_u32 == 100) { 415 /* 100 us*/ 416 hub->conf_data2 &= ~BIT(5); 417 hub->conf_data2 &= ~BIT(4); 418 } else if (property_u32 == 4000) { 419 /* 4 ms */ 420 hub->conf_data2 &= ~BIT(5); 421 hub->conf_data2 |= BIT(4); 422 } else if (property_u32 == 16000) { 423 /* 16 ms */ 424 hub->conf_data2 |= BIT(5); 425 hub->conf_data2 |= BIT(4); 426 } else { 427 /* 8 ms (DEFAULT) */ 428 hub->conf_data2 |= BIT(5); 429 hub->conf_data2 &= ~BIT(4); 430 } 431 } 432 433 if (of_get_property(np, "compound-device", NULL)) 434 hub->conf_data2 |= BIT(3); 435 436 hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3; 437 if (of_get_property(np, "port-mapping-mode", NULL)) 438 hub->conf_data3 |= BIT(3); 439 440 if (data->led_support && of_get_property(np, "led-usb-mode", NULL)) 441 hub->conf_data3 &= ~BIT(1); 442 443 if (of_get_property(np, "string-support", NULL)) 444 hub->conf_data3 |= BIT(0); 445 446 hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES; 447 cproperty_u32 = of_get_property(np, "non-removable-ports", &len); 448 if (cproperty_u32 && (len / sizeof(u32)) > 0) { 449 for (i = 0; i < len / sizeof(u32); i++) { 450 u32 port = be32_to_cpu(cproperty_u32[i]); 451 452 if ((port >= 1) && (port <= data->port_cnt)) 453 hub->non_rem_dev |= BIT(port); 454 else 455 dev_warn(dev, "NRD port %u doesn't exist\n", 456 port); 457 } 458 } 459 460 hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF; 461 cproperty_u32 = of_get_property(np, "sp-disabled-ports", &len); 462 if (cproperty_u32 && (len / sizeof(u32)) > 0) { 463 for (i = 0; i < len / sizeof(u32); i++) { 464 u32 port = be32_to_cpu(cproperty_u32[i]); 465 466 if ((port >= 1) && (port <= data->port_cnt)) 467 hub->port_disable_sp |= BIT(port); 468 else 469 dev_warn(dev, "PDS port %u doesn't exist\n", 470 port); 471 } 472 } 473 474 hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS; 475 cproperty_u32 = of_get_property(np, "bp-disabled-ports", &len); 476 if (cproperty_u32 && (len / sizeof(u32)) > 0) { 477 for (i = 0; i < len / sizeof(u32); i++) { 478 u32 port = be32_to_cpu(cproperty_u32[i]); 479 480 if ((port >= 1) && (port <= data->port_cnt)) 481 hub->port_disable_bp |= BIT(port); 482 else 483 dev_warn(dev, "PDB port %u doesn't exist\n", 484 port); 485 } 486 } 487 488 hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF; 489 if (!of_property_read_u32(np, "sp-max-total-current-microamp", 490 &property_u32)) 491 hub->max_power_sp = min_t(u8, property_u32 / 2000, 50); 492 493 hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS; 494 if (!of_property_read_u32(np, "bp-max-total-current-microamp", 495 &property_u32)) 496 hub->max_power_bp = min_t(u8, property_u32 / 2000, 255); 497 498 hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF; 499 if (!of_property_read_u32(np, "sp-max-removable-current-microamp", 500 &property_u32)) 501 hub->max_current_sp = min_t(u8, property_u32 / 2000, 50); 502 503 hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS; 504 if (!of_property_read_u32(np, "bp-max-removable-current-microamp", 505 &property_u32)) 506 hub->max_current_bp = min_t(u8, property_u32 / 2000, 255); 507 508 hub->power_on_time = USB251XB_DEF_POWER_ON_TIME; 509 if (!of_property_read_u32(np, "power-on-time-ms", &property_u32)) 510 hub->power_on_time = min_t(u8, property_u32 / 2, 255); 511 512 if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1)) 513 hub->lang_id = USB251XB_DEF_LANGUAGE_ID; 514 515 cproperty_char = of_get_property(np, "manufacturer", NULL); 516 strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING, 517 sizeof(str)); 518 hub->manufacturer_len = strlen(str) & 0xFF; 519 memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE); 520 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str)); 521 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN, 522 (wchar_t *)hub->manufacturer, 523 USB251XB_STRING_BUFSIZE); 524 525 cproperty_char = of_get_property(np, "product", NULL); 526 strlcpy(str, cproperty_char ? : data->product_str, sizeof(str)); 527 hub->product_len = strlen(str) & 0xFF; 528 memset(hub->product, 0, USB251XB_STRING_BUFSIZE); 529 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str)); 530 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN, 531 (wchar_t *)hub->product, 532 USB251XB_STRING_BUFSIZE); 533 534 cproperty_char = of_get_property(np, "serial", NULL); 535 strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING, 536 sizeof(str)); 537 hub->serial_len = strlen(str) & 0xFF; 538 memset(hub->serial, 0, USB251XB_STRING_BUFSIZE); 539 len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str)); 540 len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN, 541 (wchar_t *)hub->serial, 542 USB251XB_STRING_BUFSIZE); 543 544 /* 545 * The datasheet documents the register as 'Port Swap' but in real the 546 * register controls the USB DP/DM signal swapping for each port. 547 */ 548 hub->port_swap = USB251XB_DEF_PORT_SWAP; 549 of_property_for_each_u32(np, "swap-dx-lanes", prop, p, port) { 550 if (port <= data->port_cnt) 551 hub->port_swap |= BIT(port); 552 } 553 554 /* The following parameters are currently not exposed to devicetree, but 555 * may be as soon as needed. 556 */ 557 hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE; 558 hub->boost_up = USB251XB_DEF_BOOST_UP; 559 hub->boost_57 = USB251XB_DEF_BOOST_57; 560 hub->boost_14 = USB251XB_DEF_BOOST_14; 561 hub->port_map12 = USB251XB_DEF_PORT_MAP_12; 562 hub->port_map34 = USB251XB_DEF_PORT_MAP_34; 563 hub->port_map56 = USB251XB_DEF_PORT_MAP_56; 564 hub->port_map7 = USB251XB_DEF_PORT_MAP_7; 565 566 return 0; 567 } 568 569 static const struct of_device_id usb251xb_of_match[] = { 570 { 571 .compatible = "microchip,usb2512b", 572 .data = &usb2512b_data, 573 }, { 574 .compatible = "microchip,usb2512bi", 575 .data = &usb2512bi_data, 576 }, { 577 .compatible = "microchip,usb2513b", 578 .data = &usb2513b_data, 579 }, { 580 .compatible = "microchip,usb2513bi", 581 .data = &usb2513bi_data, 582 }, { 583 .compatible = "microchip,usb2514b", 584 .data = &usb2514b_data, 585 }, { 586 .compatible = "microchip,usb2514bi", 587 .data = &usb2514bi_data, 588 }, { 589 .compatible = "microchip,usb2517", 590 .data = &usb2517_data, 591 }, { 592 .compatible = "microchip,usb2517i", 593 .data = &usb2517i_data, 594 }, { 595 /* sentinel */ 596 } 597 }; 598 MODULE_DEVICE_TABLE(of, usb251xb_of_match); 599 #else /* CONFIG_OF */ 600 static int usb251xb_get_ofdata(struct usb251xb *hub, 601 struct usb251xb_data *data) 602 { 603 return 0; 604 } 605 #endif /* CONFIG_OF */ 606 607 static int usb251xb_probe(struct usb251xb *hub) 608 { 609 struct device *dev = hub->dev; 610 struct device_node *np = dev->of_node; 611 const struct of_device_id *of_id = of_match_device(usb251xb_of_match, 612 dev); 613 int err; 614 615 if (np && of_id) { 616 err = usb251xb_get_ofdata(hub, 617 (struct usb251xb_data *)of_id->data); 618 if (err) { 619 dev_err(dev, "failed to get ofdata: %d\n", err); 620 return err; 621 } 622 } 623 624 err = usb251xb_connect(hub); 625 if (err) { 626 dev_err(dev, "Failed to connect hub (%d)\n", err); 627 return err; 628 } 629 630 dev_info(dev, "Hub probed successfully\n"); 631 632 return 0; 633 } 634 635 static int usb251xb_i2c_probe(struct i2c_client *i2c, 636 const struct i2c_device_id *id) 637 { 638 struct usb251xb *hub; 639 640 hub = devm_kzalloc(&i2c->dev, sizeof(struct usb251xb), GFP_KERNEL); 641 if (!hub) 642 return -ENOMEM; 643 644 i2c_set_clientdata(i2c, hub); 645 hub->dev = &i2c->dev; 646 hub->i2c = i2c; 647 648 return usb251xb_probe(hub); 649 } 650 651 static const struct i2c_device_id usb251xb_id[] = { 652 { "usb2512b", 0 }, 653 { "usb2512bi", 0 }, 654 { "usb2513b", 0 }, 655 { "usb2513bi", 0 }, 656 { "usb2514b", 0 }, 657 { "usb2514bi", 0 }, 658 { "usb2517", 0 }, 659 { "usb2517i", 0 }, 660 { /* sentinel */ } 661 }; 662 MODULE_DEVICE_TABLE(i2c, usb251xb_id); 663 664 static struct i2c_driver usb251xb_i2c_driver = { 665 .driver = { 666 .name = DRIVER_NAME, 667 .of_match_table = of_match_ptr(usb251xb_of_match), 668 }, 669 .probe = usb251xb_i2c_probe, 670 .id_table = usb251xb_id, 671 }; 672 673 module_i2c_driver(usb251xb_i2c_driver); 674 675 MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>"); 676 MODULE_DESCRIPTION("USB251x/xBi USB 2.0 Hub Controller Driver"); 677 MODULE_LICENSE("GPL"); 678