src/arm/ti/omap/am3874-iceboard.dts

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Device tree for Winterland IceBoard
   4  *
   5  * https://mcgillcosmology.com
   6  * https://threespeedlogic.com
   7  *
   8  * This is an ARM + FPGA instrumentation board used at telescopes in
   9  * Antarctica (the South Pole Telescope), Chile (POLARBEAR), and at the DRAO
  10  * observatory in British Columbia (CHIME).
  11  *
  12  * Copyright (c) 2019 Three-Speed Logic, Inc. <gsmecher@threespeedlogic.com>
  13  */
  14
  15 /dts-v1/;
  16
  17 #include "dm814x.dtsi"
  18 #include <dt-bindings/interrupt-controller/irq.h>
  19
  20 / {
  21         model = "Winterland IceBoard";
  22         compatible = "ti,dm8148", "ti,dm814";
  23
  24         chosen {
  25                 stdout-path = "serial1:115200n8";
  26                 bootargs = "earlycon";
  27         };
  28
  29         memory@80000000 {
  30                 device_type = "memory";
  31                 reg = <0x80000000 0x40000000>;  /* 1 GB */
  32         };
  33
  34         vmmcsd_fixed: fixedregulator0 {
  35                 compatible = "regulator-fixed";
  36                 regulator-name = "vmmcsd_fixed";
  37                 regulator-min-microvolt = <3300000>;
  38                 regulator-max-microvolt = <3300000>;
  39                 regulator-always-on;
  40         };
  41 };
  42
  43 /* The MAC provides internal delay for the transmit path ONLY, which is enabled
  44  * provided no -id/-txid/-rxid suffix is provided to "phy-mode".
  45  *
  46  * The receive path is delayed at the PHY. The recommended register settings
  47  * are 0xf0 for the control bits, and 0x7777 for the data bits. However, the
  48  * conversion code in the kernel lies: the PHY's registers are 120 ps per tap,
  49  * and the kernel assumes 200 ps per tap. So we have fudged the numbers here to
  50  * obtain the correct register settings.
  51  */
  52 &mac { dual_emac = <1>; };
  53 &cpsw_emac0 {
  54         phy-handle = <&ethphy0>;
  55         phy-mode = "rgmii";
  56         dual_emac_res_vlan = <1>;
  57 };
  58 &cpsw_emac1 {
  59         phy-handle = <&ethphy1>;
  60         phy-mode = "rgmii";
  61         dual_emac_res_vlan = <2>;
  62 };
  63
  64 &davinci_mdio {
  65         ethphy0: ethernet-phy@0 {
  66                 reg = <0x2>;
  67
  68                 rxc-skew-ps = <3000>;
  69                 rxdv-skew-ps = <0>;
  70
  71                 rxd3-skew-ps = <0>;
  72                 rxd2-skew-ps = <0>;
  73                 rxd1-skew-ps = <0>;
  74                 rxd0-skew-ps = <0>;
  75
  76                 phy-reset-gpios = <&gpio2 8 GPIO_ACTIVE_LOW>;
  77         };
  78
  79         ethphy1: ethernet-phy@1 {
  80                 reg = <0x1>;
  81
  82                 rxc-skew-ps = <3000>;
  83                 rxdv-skew-ps = <0>;
  84
  85                 rxd3-skew-ps = <0>;
  86                 rxd2-skew-ps = <0>;
  87                 rxd1-skew-ps = <0>;
  88                 rxd0-skew-ps = <0>;
  89
  90                 phy-reset-gpios = <&gpio2 1 GPIO_ACTIVE_LOW>;
  91         };
  92 };
  93
  94 &mmc1 { status = "disabled"; };
  95 &mmc2 {
  96         pinctrl-names = "default";
  97         pinctrl-0 = <&mmc2_pins>;
  98         vmmc-supply = <&vmmcsd_fixed>;
  99         bus-width = <4>;
 100 };
 101 &mmc3 { status = "disabled"; };
 102
 103 &i2c1 {
 104         /* Most I2C activity happens through this port, with the sole exception
 105          * of the backplane. Since there are multiply assigned addresses, the
 106          * "i2c-mux-idle-disconnect" is important.
 107          */
 108
 109         i2c-mux@70 {
 110                 compatible = "nxp,pca9548";
 111                 reg = <0x70>;
 112                 #address-cells = <1>;
 113                 #size-cells = <0>;
 114                 i2c-mux-idle-disconnect;
 115
 116                 i2c@0 {
 117                         /* FMC A */
 118                         #address-cells = <1>;
 119                         #size-cells = <0>;
 120                         reg = <0>;
 121                 };
 122
 123                 i2c@1 {
 124                         /* FMC B */
 125                         #address-cells = <1>;
 126                         #size-cells = <0>;
 127                         reg = <1>;
 128                 };
 129
 130                 i2c@2 {
 131                         /* QSFP A */
 132                         #address-cells = <1>;
 133                         #size-cells = <0>;
 134                         reg = <2>;
 135                 };
 136
 137                 i2c@3 {
 138                         /* QSFP B */
 139                         #address-cells = <1>;
 140                         #size-cells = <0>;
 141                         reg = <3>;
 142                 };
 143
 144                 i2c@4 {
 145                         /* SFP */
 146                         #address-cells = <1>;
 147                         #size-cells = <0>;
 148                         reg = <4>;
 149                 };
 150
 151                 i2c@5 {
 152                         #address-cells = <1>;
 153                         #size-cells = <0>;
 154                         reg = <5>;
 155
 156                         ina230@40 { compatible = "ti,ina230"; reg = <0x40>; shunt-resistor = <5000>; };
 157                         ina230@41 { compatible = "ti,ina230"; reg = <0x41>; shunt-resistor = <5000>; };
 158                         ina230@42 { compatible = "ti,ina230"; reg = <0x42>; shunt-resistor = <5000>; };
 159
 160                         ina230@44 { compatible = "ti,ina230"; reg = <0x44>; shunt-resistor = <5000>; };
 161                         ina230@45 { compatible = "ti,ina230"; reg = <0x45>; shunt-resistor = <5000>; };
 162                         ina230@46 { compatible = "ti,ina230"; reg = <0x46>; shunt-resistor = <5000>; };
 163
 164                         ina230@47 { compatible = "ti,ina230"; reg = <0x47>; shunt-resistor = <5500>; };
 165                         ina230@48 { compatible = "ti,ina230"; reg = <0x48>; shunt-resistor = <2360>; };
 166                         ina230@49 { compatible = "ti,ina230"; reg = <0x49>; shunt-resistor = <2360>; };
 167                         ina230@43 { compatible = "ti,ina230"; reg = <0x43>; shunt-resistor = <2360>; };
 168                         ina230@4b { compatible = "ti,ina230"; reg = <0x4b>; shunt-resistor = <5500>; };
 169                         ina230@4c { compatible = "ti,ina230"; reg = <0x4c>; shunt-resistor = <2360>; };
 170                         ina230@4d { compatible = "ti,ina230"; reg = <0x4d>; shunt-resistor = <770>; };
 171                         ina230@4e { compatible = "ti,ina230"; reg = <0x4e>; shunt-resistor = <770>; };
 172                         ina230@4f { compatible = "ti,ina230"; reg = <0x4f>; shunt-resistor = <770>; };
 173                 };
 174
 175                 i2c@6 {
 176                         /* Backplane */
 177                         #address-cells = <1>;
 178                         #size-cells = <0>;
 179                         reg = <6>;
 180                 };
 181
 182                 i2c@7 {
 183                         #address-cells = <1>;
 184                         #size-cells = <0>;
 185                         reg = <7>;
 186
 187                         u41: pca9575@20 {
 188                                 compatible = "nxp,pca9575";
 189                                 reg = <0x20>;
 190                                 gpio-controller;
 191                                 #gpio-cells = <2>;
 192
 193                                 gpio-line-names =
 194                                         "FMCA_EN_12V0", "FMCA_EN_3V3", "FMCA_EN_VADJ", "FMCA_PG_M2C",
 195                                         "FMCA_PG_C2M", "FMCA_PRSNT_M2C_L", "FMCA_CLK_DIR", "SFP_LOS",
 196                                         "FMCB_EN_12V0", "FMCB_EN_3V3", "FMCB_EN_VADJ", "FMCB_PG_M2C",
 197                                         "FMCB_PG_C2M", "FMCB_PRSNT_M2C_L", "FMCB_CLK_DIR", "SFP_ModPrsL";
 198                                 reset-gpios = <&gpio2 11 GPIO_ACTIVE_LOW>;
 199                         };
 200
 201                         u42: pca9575@21 {
 202                                 compatible = "nxp,pca9575";
 203                                 reg = <0x21>;
 204                                 gpio-controller;
 205                                 #gpio-cells = <2>;
 206                                 gpio-line-names =
 207                                         "QSFPA_ModPrsL", "QSFPA_IntL", "QSFPA_ResetL", "QSFPA_ModSelL",
 208                                         "QSFPA_LPMode", "QSFPB_ModPrsL", "QSFPB_IntL", "QSFPB_ResetL",
 209                                         "SFP_TxFault", "SFP_TxDisable", "SFP_RS0", "SFP_RS1",
 210                                         "QSFPB_ModSelL", "QSFPB_LPMode", "SEL_SFP", "ARM_MR";
 211                                 reset-gpios = <&gpio2 11 GPIO_ACTIVE_LOW>;
 212                         };
 213
 214                         u48: pca9575@22 {
 215                                 compatible = "nxp,pca9575";
 216                                 reg = <0x22>;
 217                                 gpio-controller;
 218                                 #gpio-cells = <2>;
 219
 220                                 sw-gpios = <&u48 0 0>, <&u48 1 0>, <&u48 2 0>, <&u48 3 0>,
 221                                         <&u48 4 0>, <&u48 5 0>, <&u48 6 0>, <&u48 7 0>;
 222                                 led-gpios = <&u48 7 0>, <&u48 6 0>, <&u48 5 0>, <&u48 4 0>,
 223                                         <&u48 3 0>, <&u48 2 0>, <&u48 1 0>, <&u48 0 0>;
 224
 225                                 gpio-line-names =
 226                                         "GP_SW1", "GP_SW2", "GP_SW3", "GP_SW4",
 227                                         "GP_SW5", "GP_SW6", "GP_SW7", "GP_SW8",
 228                                         "GP_LED8", "GP_LED7", "GP_LED6", "GP_LED5",
 229                                         "GP_LED4", "GP_LED3", "GP_LED2", "GP_LED1";
 230                                 reset-gpios = <&gpio2 11 GPIO_ACTIVE_LOW>;
 231                         };
 232
 233                         u59: pca9575@23 {
 234                                 compatible = "nxp,pca9575";
 235                                 reg = <0x23>;
 236                                 gpio-controller;
 237                                 #gpio-cells = <2>;
 238                                 gpio-line-names =
 239                                         "GP_LED9", "GP_LED10", "GP_LED11", "GP_LED12",
 240                                         "GTX1V8PowerFault", "PHYAPowerFault", "PHYBPowerFault", "ArmPowerFault",
 241                                         "BP_SLOW_GPIO0", "BP_SLOW_GPIO1", "BP_SLOW_GPIO2", "BP_SLOW_GPIO3",
 242                                         "BP_SLOW_GPIO4", "BP_SLOW_GPIO5", "__unused_u59_p16", "__unused_u59_p17";
 243                                 reset-gpios = <&gpio2 11 GPIO_ACTIVE_LOW>;
 244                         };
 245
 246                         tmp100@48 { compatible = "ti,tmp100"; reg = <0x48>; };
 247                         tmp100@4a { compatible = "ti,tmp100"; reg = <0x4a>; };
 248                         tmp100@4b { compatible = "ti,tmp100"; reg = <0x4b>; };
 249                         tmp100@4c { compatible = "ti,tmp100"; reg = <0x4c>; };
 250
 251                         /* EEPROM bank and serial number are treated as separate devices */
 252                         at24c01@57 { compatible = "atmel,24c01"; reg = <0x57>; };
 253                         at24cs01@5f { compatible = "atmel,24cs01"; reg = <0x5f>; };
 254                 };
 255         };
 256 };
 257
 258 &i2c2 {
 259         i2c-mux@71 {
 260                 compatible = "nxp,pca9548";
 261                 reg = <0x71>;
 262                 #address-cells = <1>;
 263                 #size-cells = <0>;
 264
 265                 i2c@6 {
 266                         /* Backplane */
 267                         #address-cells = <1>;
 268                         #size-cells = <0>;
 269                         reg = <6>;
 270                         multi-master;
 271
 272                         /* All backplanes should have this -- it's how we know they're there. */
 273                         at24c08@54 { compatible="atmel,24c08"; reg=<0x54>; };
 274                         at24cs08@5c { compatible="atmel,24cs08"; reg=<0x5c>; };
 275
 276                         /* 16 slot backplane */
 277                         tmp421@4d { compatible="ti,tmp421"; reg=<0x4d>; };
 278                         tmp421@4e { compatible="ti,tmp421"; reg=<0x4e>; };
 279                         ina230@40 { compatible = "ti,ina230"; reg = <0x40>; shunt-resistor = <2360>; };
 280                         amc6821@18 { compatible = "ti,amc6821"; reg = <0x18>; };
 281
 282                         /* Single slot backplane */
 283                 };
 284         };
 285 };
 286
 287 &pincntl {
 288         mmc2_pins: mmc2-pins {
 289                 pinctrl-single,pins = <
 290                         DM814X_IOPAD(0x0800, PIN_INPUT | 0x1)   /* SD1_CLK */
 291                         DM814X_IOPAD(0x0804, PIN_INPUT_PULLUP | 0x1)    /* SD1_CMD */
 292                         DM814X_IOPAD(0x0808, PIN_INPUT_PULLUP | 0x1)    /* SD1_DAT[0] */
 293                         DM814X_IOPAD(0x080c, PIN_INPUT_PULLUP | 0x1)    /* SD1_DAT[1] */
 294                         DM814X_IOPAD(0x0810, PIN_INPUT_PULLUP | 0x1)    /* SD1_DAT[2] */
 295                         DM814X_IOPAD(0x0814, PIN_INPUT_PULLUP | 0x1)    /* SD1_DAT[3] */
 296                         DM814X_IOPAD(0x0924, PIN_INPUT_PULLUP | 0x40)   /* SD1_POW */
 297                         DM814X_IOPAD(0x0928, PIN_INPUT | 0x40)  /* SD1_SDWP */
 298                         DM814X_IOPAD(0x093C, PIN_INPUT | 0x2)   /* SD1_SDCD */
 299                         >;
 300         };
 301
 302         usb0_pins: usb0-pins {
 303                 pinctrl-single,pins = <
 304                         DM814X_IOPAD(0x0c34, PIN_OUTPUT | 0x1)  /* USB0_DRVVBUS */
 305                         >;
 306         };
 307
 308         usb1_pins: usb1-pins {
 309                 pinctrl-single,pins = <
 310                         DM814X_IOPAD(0x0834, PIN_OUTPUT | 0x80) /* USB1_DRVVBUS */
 311                         >;
 312         };
 313
 314         gpio1_pins: gpio1-pins {
 315                 pinctrl-single,pins = <
 316                         DM814X_IOPAD(0x081c, PIN_OUTPUT | 0x80) /* PROGRAM_B */
 317                         DM814X_IOPAD(0x0820, PIN_INPUT | 0x80)  /* INIT_B */
 318                         DM814X_IOPAD(0x0824, PIN_INPUT | 0x80)  /* DONE */
 319
 320                         DM814X_IOPAD(0x0838, PIN_INPUT_PULLUP | 0x80) /* FMCA_TMS */
 321                         DM814X_IOPAD(0x083c, PIN_INPUT_PULLUP | 0x80) /* FMCA_TCK */
 322                         DM814X_IOPAD(0x0898, PIN_INPUT_PULLUP | 0x80) /* FMCA_TDO */
 323                         DM814X_IOPAD(0x089c, PIN_INPUT_PULLUP | 0x80) /* FMCA_TDI */
 324                         DM814X_IOPAD(0x08ac, PIN_INPUT_PULLUP | 0x80) /* FMCA_TRST */
 325
 326                         DM814X_IOPAD(0x08b0, PIN_INPUT_PULLUP | 0x80) /* FMCB_TMS */
 327                         DM814X_IOPAD(0x0a88, PIN_INPUT_PULLUP | 0x80) /* FMCB_TCK */
 328                         DM814X_IOPAD(0x0a8c, PIN_INPUT_PULLUP | 0x80) /* FMCB_TDO */
 329                         DM814X_IOPAD(0x08bc, PIN_INPUT_PULLUP | 0x80) /* FMCB_TDI */
 330                         DM814X_IOPAD(0x0a94, PIN_INPUT_PULLUP | 0x80) /* FMCB_TRST */
 331
 332                         DM814X_IOPAD(0x08d4, PIN_INPUT_PULLUP | 0x80) /* FPGA_TMS */
 333                         DM814X_IOPAD(0x0aa8, PIN_INPUT_PULLUP | 0x80) /* FPGA_TCK */
 334                         DM814X_IOPAD(0x0adc, PIN_INPUT_PULLUP | 0x80) /* FPGA_TDO */
 335                         DM814X_IOPAD(0x0ab0, PIN_INPUT_PULLUP | 0x80) /* FPGA_TDI */
 336                         >;
 337         };
 338
 339         gpio2_pins: gpio2-pins {
 340                 pinctrl-single,pins = <
 341                         DM814X_IOPAD(0x090c, PIN_INPUT_PULLUP | 0x80) /* PHY A IRQ */
 342                         DM814X_IOPAD(0x0910, PIN_INPUT_PULLUP | 0x80) /* PHY A RESET */
 343                         DM814X_IOPAD(0x08f4, PIN_INPUT_PULLUP | 0x80) /* PHY B IRQ */
 344                         DM814X_IOPAD(0x08f8, PIN_INPUT_PULLUP | 0x80) /* PHY B RESET */
 345
 346                         //DM814X_IOPAD(0x0a14, PIN_INPUT_PULLUP | 0x80) /* ARM IRQ */
 347                         //DM814X_IOPAD(0x0900, PIN_INPUT | 0x80) /* GPIO IRQ */
 348                         DM814X_IOPAD(0x0a2c, PIN_INPUT_PULLUP | 0x80) /* GPIO RESET */
 349                 >;
 350         };
 351
 352         gpio4_pins: gpio4-pins {
 353                 pinctrl-single,pins = <
 354                         /* The PLL doesn't react well to the SPI controller reset, so
 355                          * we force the CS lines to pull up as GPIOs until we're ready.
 356                          * See https://e2e.ti.com/support/processors/f/791/t/276011?Linux-support-for-AM3874-DM8148-in-Arago-linux-omap3
 357                          */
 358                         DM814X_IOPAD(0x0b3c, PIN_INPUT_PULLUP | 0x80) /* BP_ARM_GPIO0 */
 359                         DM814X_IOPAD(0x0b40, PIN_INPUT_PULLUP | 0x80) /* BP_ARM_GPIO1 */
 360                         DM814X_IOPAD(0x0b44, PIN_INPUT_PULLUP | 0x80) /* BP_ARM_GPIO2 */
 361                         DM814X_IOPAD(0x0b48, PIN_INPUT_PULLUP | 0x80) /* BP_ARM_GPIO3 */
 362                         DM814X_IOPAD(0x0b4c, PIN_INPUT_PULLUP | 0x80) /* BP_ARM_GPIO4 */
 363                         DM814X_IOPAD(0x0b50, PIN_INPUT_PULLUP | 0x80) /* BP_ARM_GPIO5 */
 364                 >;
 365         };
 366
 367         spi2_pins: spi2-pins {
 368                 pinctrl-single,pins = <
 369                         DM814X_IOPAD(0x0950, PIN_INPUT_PULLUP | 0x80) /* PLL SPI CS1 as GPIO */
 370                         DM814X_IOPAD(0x0818, PIN_INPUT_PULLUP | 0x80) /* PLL SPI CS2 as GPIO */
 371                 >;
 372         };
 373
 374         spi4_pins: spi4-pins {
 375                 pinctrl-single,pins = <
 376                         DM814X_IOPAD(0x0a7c, 0x20)
 377                         DM814X_IOPAD(0x0b74, 0x20)
 378                         DM814X_IOPAD(0x0b78, PIN_OUTPUT | 0x20)
 379                         DM814X_IOPAD(0x0b7c, PIN_OUTPUT_PULLDOWN | 0x20)
 380                         DM814X_IOPAD(0x0b80, PIN_INPUT | 0x20)
 381                 >;
 382         };
 383 };
 384
 385 &gpio1 {
 386         pinctrl-names = "default";
 387         pinctrl-0 = <&gpio1_pins>;
 388         gpio-line-names =
 389                 "", "PROGRAM_B", "INIT_B", "DONE",                      /* 0-3 */
 390                 "", "", "", "",                                         /* 4-7 */
 391                 "FMCA_TMS", "FMCA_TCK", "FMCA_TDO", "FMCA_TDI",         /* 8-11 */
 392                 "", "", "", "FMCA_TRST",                                /* 12-15 */
 393                 "FMCB_TMS", "FMCB_TCK", "FMCB_TDO", "FMCB_TDI",         /* 16-19 */
 394                 "FMCB_TRST", "", "", "",                                /* 20-23 */
 395                 "FPGA_TMS", "FPGA_TCK", "FPGA_TDO", "FPGA_TDI",         /* 24-27 */
 396                 "", "", "", "";                                         /* 28-31 */
 397 };
 398
 399 &gpio2 {
 400         pinctrl-names = "default";
 401         pinctrl-0 = <&gpio2_pins>;
 402         gpio-line-names =
 403                 "PHYA_IRQ_N", "PHYA_RESET_N", "", "",                   /* 0-3 */
 404                 "", "", "", "PHYB_IRQ_N",                               /* 4-7 */
 405                 "PHYB_RESET_N", "ARM_IRQ", "GPIO_IRQ", "";              /* 8-11 */
 406 };
 407
 408 &gpio3 {
 409         pinctrl-names = "default";
 410         /*pinctrl-0 = <&gpio3_pins>;*/
 411         gpio-line-names =
 412                 "", "", "ARMClkSel0", "",                               /* 0-3 */
 413                 "EnFPGARef", "", "", "ARMClkSel1";                      /* 4-7 */
 414 };
 415
 416 &gpio4 {
 417         pinctrl-names = "default";
 418         pinctrl-0 = <&gpio4_pins>;
 419         gpio-line-names =
 420                 "BP_ARM_GPIO0", "BP_ARM_GPIO1", "BP_ARM_GPIO2", "BP_ARM_GPIO3",
 421                 "BP_ARM_GPIO4", "BP_ARM_GPIO5";
 422 };
 423
 424 &usb0 {
 425         pinctrl-names = "default";
 426         pinctrl-0 = <&usb0_pins>;
 427         dr_mode = "host";
 428 };
 429
 430 &usb1 {
 431         pinctrl-names = "default";
 432         pinctrl-0 = <&usb1_pins>;
 433         dr_mode = "host";
 434 };
 435
 436 &mcspi1 {
 437         flash@0 {
 438                 #address-cells = <1>;
 439                 #size-cells = <1>;
 440                 compatible = "jedec,spi-nor";
 441                 reg = <0>;
 442                 spi-max-frequency = <40000000>;
 443
 444                 fsbl@0 {
 445                         /* 256 kB */
 446                         label = "U-Boot-min";
 447                         reg = <0 0x40000>;
 448                 };
 449                 ssbl@1 {
 450                         /* 512 kB */
 451                         label = "U-Boot";
 452                         reg = <0x40000 0x80000>;
 453                 };
 454                 bootenv@2 {
 455                         /* 256 kB */
 456                         label = "U-Boot Env";
 457                         reg = <0xc0000 0x40000>;
 458                 };
 459                 kernel@3 {
 460                         /* 4 MB */
 461                         label = "Kernel";
 462                         reg = <0x100000 0x400000>;
 463                 };
 464                 ipmi@4 {
 465                         label = "IPMI FRU";
 466                         reg = <0x500000 0x40000>;
 467                 };
 468                 fs@5 {
 469                         label = "File System";
 470                         reg = <0x540000 0x1ac0000>;
 471                 };
 472         };
 473 };
 474
 475 &mcspi3 {
 476         /* DMA event numbers stolen from MCASP */
 477         dmas = <&edma_xbar 8 0 16 &edma_xbar 9 0 17
 478                 &edma_xbar 10 0 18 &edma_xbar 11 0 19>;
 479         dma-names = "tx0", "rx0", "tx1", "rx1";
 480 };
 481
 482 &mcspi4 {
 483         pinctrl-names = "default";
 484         pinctrl-0 = <&spi4_pins>;
 485
 486         /* DMA event numbers stolen from MCASP, MCBSP */
 487         dmas = <&edma_xbar 12 0 20 &edma_xbar 13 0 21>;
 488         dma-names = "tx0", "rx0";
 489 };