1 /* 2 * (C) Copyright 2004-2011 3 * Texas Instruments, <www.ti.com> 4 * 5 * Author : 6 * Sunil Kumar <sunilsaini05@gmail.com> 7 * Shashi Ranjan <shashiranjanmca05@gmail.com> 8 * 9 * Derived from Beagle Board and 3430 SDP code by 10 * Richard Woodruff <r-woodruff2@ti.com> 11 * Syed Mohammed Khasim <khasim@ti.com> 12 * 13 * 14 * See file CREDITS for list of people who contributed to this 15 * project. 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License as 19 * published by the Free Software Foundation; either version 2 of 20 * the License, or (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, write to the Free Software 29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 30 * MA 02111-1307 USA 31 */ 32 #include <common.h> 33 #ifdef CONFIG_STATUS_LED 34 #include <status_led.h> 35 #endif 36 #include <twl4030.h> 37 #include <linux/mtd/nand.h> 38 #include <asm/io.h> 39 #include <asm/arch/mmc_host_def.h> 40 #include <asm/arch/mux.h> 41 #include <asm/arch/mem.h> 42 #include <asm/arch/sys_proto.h> 43 #include <asm/gpio.h> 44 #include <asm/mach-types.h> 45 #ifdef CONFIG_USB_EHCI 46 #include <usb.h> 47 #include <asm/arch/clocks.h> 48 #include <asm/arch/clocks_omap3.h> 49 #include <asm/arch/ehci_omap3.h> 50 /* from drivers/usb/host/ehci-core.h */ 51 extern struct ehci_hccr *hccr; 52 extern volatile struct ehci_hcor *hcor; 53 #endif 54 #include "beagle.h" 55 #include <command.h> 56 57 #define pr_debug(fmt, args...) debug(fmt, ##args) 58 59 #define TWL4030_I2C_BUS 0 60 #define EXPANSION_EEPROM_I2C_BUS 1 61 #define EXPANSION_EEPROM_I2C_ADDRESS 0x50 62 63 #define TINCANTOOLS_ZIPPY 0x01000100 64 #define TINCANTOOLS_ZIPPY2 0x02000100 65 #define TINCANTOOLS_TRAINER 0x04000100 66 #define TINCANTOOLS_SHOWDOG 0x03000100 67 #define KBADC_BEAGLEFPGA 0x01000600 68 #define LW_BEAGLETOUCH 0x01000700 69 #define BRAINMUX_LCDOG 0x01000800 70 #define BRAINMUX_LCDOGTOUCH 0x02000800 71 #define BBTOYS_WIFI 0x01000B00 72 #define BBTOYS_VGA 0x02000B00 73 #define BBTOYS_LCD 0x03000B00 74 #define BEAGLE_NO_EEPROM 0xffffffff 75 76 DECLARE_GLOBAL_DATA_PTR; 77 78 static struct { 79 unsigned int device_vendor; 80 unsigned char revision; 81 unsigned char content; 82 char fab_revision[8]; 83 char env_var[16]; 84 char env_setting[64]; 85 } expansion_config; 86 87 /* 88 * Routine: board_init 89 * Description: Early hardware init. 90 */ 91 int board_init(void) 92 { 93 gpmc_init(); /* in SRAM or SDRAM, finish GPMC */ 94 /* board id for Linux */ 95 gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE; 96 /* boot param addr */ 97 gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100); 98 99 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT) 100 status_led_set (STATUS_LED_BOOT, STATUS_LED_ON); 101 #endif 102 103 return 0; 104 } 105 106 /* 107 * Routine: get_board_revision 108 * Description: Detect if we are running on a Beagle revision Ax/Bx, 109 * C1/2/3, C4 or xM. This can be done by reading 110 * the level of GPIO173, GPIO172 and GPIO171. This should 111 * result in 112 * GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx 113 * GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3 114 * GPIO173, GPIO172, GPIO171: 1 0 1 => C4 115 * GPIO173, GPIO172, GPIO171: 0 0 0 => xM 116 */ 117 int get_board_revision(void) 118 { 119 int revision; 120 121 if (!gpio_request(171, "") && 122 !gpio_request(172, "") && 123 !gpio_request(173, "")) { 124 125 gpio_direction_input(171); 126 gpio_direction_input(172); 127 gpio_direction_input(173); 128 129 revision = gpio_get_value(173) << 2 | 130 gpio_get_value(172) << 1 | 131 gpio_get_value(171); 132 } else { 133 printf("Error: unable to acquire board revision GPIOs\n"); 134 revision = -1; 135 } 136 137 return revision; 138 } 139 140 #ifdef CONFIG_SPL_BUILD 141 /* 142 * Routine: get_board_mem_timings 143 * Description: If we use SPL then there is no x-loader nor config header 144 * so we have to setup the DDR timings ourself on both banks. 145 */ 146 void get_board_mem_timings(u32 *mcfg, u32 *ctrla, u32 *ctrlb, u32 *rfr_ctrl, 147 u32 *mr) 148 { 149 int pop_mfr, pop_id; 150 151 /* 152 * We need to identify what PoP memory is on the board so that 153 * we know what timings to use. If we can't identify it then 154 * we know it's an xM. To map the ID values please see nand_ids.c 155 */ 156 identify_nand_chip(&pop_mfr, &pop_id); 157 158 *mr = MICRON_V_MR_165; 159 switch (get_board_revision()) { 160 case REVISION_C4: 161 if (pop_mfr == NAND_MFR_STMICRO && pop_id == 0xba) { 162 /* 512MB DDR */ 163 *mcfg = NUMONYX_V_MCFG_165(512 << 20); 164 *ctrla = NUMONYX_V_ACTIMA_165; 165 *ctrlb = NUMONYX_V_ACTIMB_165; 166 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 167 break; 168 } else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xbc) { 169 /* Beagleboard Rev C5, 256MB DDR */ 170 *mcfg = MICRON_V_MCFG_200(256 << 20); 171 *ctrla = MICRON_V_ACTIMA_200; 172 *ctrlb = MICRON_V_ACTIMB_200; 173 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz; 174 break; 175 } 176 case REVISION_XM_A: 177 case REVISION_XM_B: 178 case REVISION_XM_C: 179 if (pop_mfr == 0) { 180 /* 256MB DDR */ 181 *mcfg = MICRON_V_MCFG_200(256 << 20); 182 *ctrla = MICRON_V_ACTIMA_200; 183 *ctrlb = MICRON_V_ACTIMB_200; 184 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz; 185 } else { 186 /* 512MB DDR */ 187 *mcfg = NUMONYX_V_MCFG_165(512 << 20); 188 *ctrla = NUMONYX_V_ACTIMA_165; 189 *ctrlb = NUMONYX_V_ACTIMB_165; 190 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 191 } 192 break; 193 default: 194 /* Assume 128MB and Micron/165MHz timings to be safe */ 195 *mcfg = MICRON_V_MCFG_165(128 << 20); 196 *ctrla = MICRON_V_ACTIMA_165; 197 *ctrlb = MICRON_V_ACTIMB_165; 198 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 199 } 200 } 201 #endif 202 203 /* 204 * Routine: get_expansion_id 205 * Description: This function checks for expansion board by checking I2C 206 * bus 1 for the availability of an AT24C01B serial EEPROM. 207 * returns the device_vendor field from the EEPROM 208 */ 209 unsigned int get_expansion_id(void) 210 { 211 i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS); 212 213 /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */ 214 if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) { 215 i2c_set_bus_num(TWL4030_I2C_BUS); 216 return BEAGLE_NO_EEPROM; 217 } 218 219 /* read configuration data */ 220 i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config, 221 sizeof(expansion_config)); 222 223 i2c_set_bus_num(TWL4030_I2C_BUS); 224 225 return expansion_config.device_vendor; 226 } 227 228 /* 229 * Configure DSS to display background color on DVID 230 * Configure VENC to display color bar on S-Video 231 */ 232 void beagle_display_init(void) 233 { 234 omap3_dss_venc_config(&venc_config_std_tv, VENC_HEIGHT, VENC_WIDTH); 235 switch (get_board_revision()) { 236 case REVISION_AXBX: 237 case REVISION_CX: 238 case REVISION_C4: 239 omap3_dss_panel_config(&dvid_cfg); 240 break; 241 case REVISION_XM_A: 242 case REVISION_XM_B: 243 case REVISION_XM_C: 244 default: 245 omap3_dss_panel_config(&dvid_cfg_xm); 246 break; 247 } 248 } 249 250 /* 251 * Routine: misc_init_r 252 * Description: Configure board specific parts 253 */ 254 int misc_init_r(void) 255 { 256 struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE; 257 struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE; 258 struct control_prog_io *prog_io_base = (struct control_prog_io *)OMAP34XX_CTRL_BASE; 259 260 /* Enable i2c2 pullup resisters */ 261 writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1); 262 263 switch (get_board_revision()) { 264 case REVISION_AXBX: 265 printf("Beagle Rev Ax/Bx\n"); 266 setenv("beaglerev", "AxBx"); 267 break; 268 case REVISION_CX: 269 printf("Beagle Rev C1/C2/C3\n"); 270 setenv("beaglerev", "Cx"); 271 MUX_BEAGLE_C(); 272 break; 273 case REVISION_C4: 274 printf("Beagle Rev C4\n"); 275 setenv("beaglerev", "C4"); 276 MUX_BEAGLE_C(); 277 /* Set VAUX2 to 1.8V for EHCI PHY */ 278 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 279 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 280 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 281 TWL4030_PM_RECEIVER_DEV_GRP_P1); 282 break; 283 case REVISION_XM_A: 284 printf("Beagle xM Rev A\n"); 285 setenv("beaglerev", "xMA"); 286 MUX_BEAGLE_XM(); 287 /* Set VAUX2 to 1.8V for EHCI PHY */ 288 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 289 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 290 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 291 TWL4030_PM_RECEIVER_DEV_GRP_P1); 292 break; 293 case REVISION_XM_B: 294 printf("Beagle xM Rev B\n"); 295 setenv("beaglerev", "xMB"); 296 MUX_BEAGLE_XM(); 297 /* Set VAUX2 to 1.8V for EHCI PHY */ 298 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 299 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 300 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 301 TWL4030_PM_RECEIVER_DEV_GRP_P1); 302 break; 303 case REVISION_XM_C: 304 printf("Beagle xM Rev C\n"); 305 setenv("beaglerev", "xMC"); 306 MUX_BEAGLE_XM(); 307 /* Set VAUX2 to 1.8V for EHCI PHY */ 308 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 309 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 310 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 311 TWL4030_PM_RECEIVER_DEV_GRP_P1); 312 break; 313 default: 314 printf("Beagle unknown 0x%02x\n", get_board_revision()); 315 MUX_BEAGLE_XM(); 316 /* Set VAUX2 to 1.8V for EHCI PHY */ 317 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 318 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 319 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 320 TWL4030_PM_RECEIVER_DEV_GRP_P1); 321 } 322 323 switch (get_expansion_id()) { 324 case TINCANTOOLS_ZIPPY: 325 printf("Recognized Tincantools Zippy board (rev %d %s)\n", 326 expansion_config.revision, 327 expansion_config.fab_revision); 328 MUX_TINCANTOOLS_ZIPPY(); 329 setenv("buddy", "zippy"); 330 break; 331 case TINCANTOOLS_ZIPPY2: 332 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n", 333 expansion_config.revision, 334 expansion_config.fab_revision); 335 MUX_TINCANTOOLS_ZIPPY(); 336 setenv("buddy", "zippy2"); 337 break; 338 case TINCANTOOLS_TRAINER: 339 printf("Recognized Tincantools Trainer board (rev %d %s)\n", 340 expansion_config.revision, 341 expansion_config.fab_revision); 342 MUX_TINCANTOOLS_ZIPPY(); 343 MUX_TINCANTOOLS_TRAINER(); 344 setenv("buddy", "trainer"); 345 break; 346 case TINCANTOOLS_SHOWDOG: 347 printf("Recognized Tincantools Showdow board (rev %d %s)\n", 348 expansion_config.revision, 349 expansion_config.fab_revision); 350 /* Place holder for DSS2 definition for showdog lcd */ 351 setenv("defaultdisplay", "showdoglcd"); 352 setenv("buddy", "showdog"); 353 break; 354 case KBADC_BEAGLEFPGA: 355 printf("Recognized KBADC Beagle FPGA board\n"); 356 MUX_KBADC_BEAGLEFPGA(); 357 setenv("buddy", "beaglefpga"); 358 break; 359 case LW_BEAGLETOUCH: 360 printf("Recognized Liquidware BeagleTouch board\n"); 361 setenv("buddy", "beagletouch"); 362 break; 363 case BRAINMUX_LCDOG: 364 printf("Recognized Brainmux LCDog board\n"); 365 setenv("buddy", "lcdog"); 366 break; 367 case BRAINMUX_LCDOGTOUCH: 368 printf("Recognized Brainmux LCDog Touch board\n"); 369 setenv("buddy", "lcdogtouch"); 370 break; 371 case BBTOYS_WIFI: 372 printf("Recognized BeagleBoardToys WiFi board\n"); 373 MUX_BBTOYS_WIFI() 374 setenv("buddy", "bbtoys-wifi"); 375 break;; 376 case BBTOYS_VGA: 377 printf("Recognized BeagleBoardToys VGA board\n"); 378 break;; 379 case BBTOYS_LCD: 380 printf("Recognized BeagleBoardToys LCD board\n"); 381 break;; 382 case BEAGLE_NO_EEPROM: 383 printf("No EEPROM on expansion board\n"); 384 setenv("buddy", "none"); 385 break; 386 default: 387 printf("Unrecognized expansion board: %x\n", 388 expansion_config.device_vendor); 389 setenv("buddy", "unknown"); 390 } 391 392 if (expansion_config.content == 1) 393 setenv(expansion_config.env_var, expansion_config.env_setting); 394 395 twl4030_power_init(); 396 switch (get_board_revision()) { 397 case REVISION_XM_A: 398 case REVISION_XM_B: 399 twl4030_led_init(TWL4030_LED_LEDEN_LEDBON); 400 break; 401 default: 402 twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON); 403 break; 404 } 405 406 /* Set GPIO states before they are made outputs */ 407 writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1, 408 &gpio6_base->setdataout); 409 writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 410 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout); 411 412 /* Configure GPIOs to output */ 413 writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe); 414 writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 415 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe); 416 417 dieid_num_r(); 418 beagle_display_init(); 419 omap3_dss_enable(); 420 421 return 0; 422 } 423 424 /* 425 * Routine: set_muxconf_regs 426 * Description: Setting up the configuration Mux registers specific to the 427 * hardware. Many pins need to be moved from protect to primary 428 * mode. 429 */ 430 void set_muxconf_regs(void) 431 { 432 MUX_BEAGLE(); 433 } 434 435 #if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD) 436 int board_mmc_init(bd_t *bis) 437 { 438 omap_mmc_init(0); 439 return 0; 440 } 441 #endif 442 443 #ifdef CONFIG_USB_EHCI 444 445 #define GPIO_PHY_RESET 147 446 447 /* Reset is needed otherwise the kernel-driver will throw an error. */ 448 int ehci_hcd_stop(void) 449 { 450 pr_debug("Resetting OMAP3 EHCI\n"); 451 gpio_set_value(GPIO_PHY_RESET, 0); 452 writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG); 453 /* disable USB clocks */ 454 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 455 sr32(&prcm_base->iclken_usbhost, 0, 1, 0); 456 sr32(&prcm_base->fclken_usbhost, 0, 2, 0); 457 sr32(&prcm_base->iclken3_core, 2, 1, 0); 458 sr32(&prcm_base->fclken3_core, 2, 1, 0); 459 return 0; 460 } 461 462 /* Call usb_stop() before starting the kernel */ 463 void show_boot_progress(int val) 464 { 465 if(val == 15) 466 usb_stop(); 467 } 468 469 /* 470 * Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard. 471 * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37. 472 * See there for additional Copyrights. 473 */ 474 int ehci_hcd_init(void) 475 { 476 pr_debug("Initializing OMAP3 ECHI\n"); 477 478 /* Put the PHY in RESET */ 479 gpio_request(GPIO_PHY_RESET, ""); 480 gpio_direction_output(GPIO_PHY_RESET, 0); 481 gpio_set_value(GPIO_PHY_RESET, 0); 482 483 /* Hold the PHY in RESET for enough time till DIR is high */ 484 /* Refer: ISSUE1 */ 485 udelay(10); 486 487 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 488 /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */ 489 sr32(&prcm_base->iclken_usbhost, 0, 1, 1); 490 /* 491 * Enable USBHOST_48M_FCLK (USBHOST_FCLK1) 492 * and USBHOST_120M_FCLK (USBHOST_FCLK2) 493 */ 494 sr32(&prcm_base->fclken_usbhost, 0, 2, 3); 495 /* Enable USBTTL_ICLK */ 496 sr32(&prcm_base->iclken3_core, 2, 1, 1); 497 /* Enable USBTTL_FCLK */ 498 sr32(&prcm_base->fclken3_core, 2, 1, 1); 499 pr_debug("USB clocks enabled\n"); 500 501 /* perform TLL soft reset, and wait until reset is complete */ 502 writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET, 503 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG); 504 /* Wait for TLL reset to complete */ 505 while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS) 506 & OMAP_USBTLL_SYSSTATUS_RESETDONE)); 507 pr_debug("TLL reset done\n"); 508 509 writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP | 510 OMAP_USBTLL_SYSCONFIG_SIDLEMODE | 511 OMAP_USBTLL_SYSCONFIG_CACTIVITY, 512 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG); 513 514 /* Put UHH in NoIdle/NoStandby mode */ 515 writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP 516 | OMAP_UHH_SYSCONFIG_SIDLEMODE 517 | OMAP_UHH_SYSCONFIG_CACTIVITY 518 | OMAP_UHH_SYSCONFIG_MIDLEMODE, 519 OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG); 520 521 /* setup burst configurations */ 522 writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN 523 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN 524 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN, 525 OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG); 526 527 /* 528 * Refer ISSUE1: 529 * Hold the PHY in RESET for enough time till 530 * PHY is settled and ready 531 */ 532 udelay(10); 533 gpio_set_value(GPIO_PHY_RESET, 1); 534 535 hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE); 536 hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10); 537 538 pr_debug("OMAP3 EHCI init done\n"); 539 return 0; 540 } 541 542 #endif /* CONFIG_USB_EHCI */ 543 544 #ifndef CONFIG_SPL_BUILD 545 /* 546 * This command returns the status of the user button on beagle xM 547 * Input - none 548 * Returns - 1 if button is held down 549 * 0 if button is not held down 550 */ 551 int do_userbutton(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 552 { 553 int button = 0; 554 int gpio; 555 556 /* 557 * pass address parameter as argv[0] (aka command name), 558 * and all remaining args 559 */ 560 switch (get_board_revision()) { 561 case REVISION_AXBX: 562 case REVISION_CX: 563 case REVISION_C4: 564 gpio = 7; 565 break; 566 case REVISION_XM_A: 567 case REVISION_XM_B: 568 case REVISION_XM_C: 569 default: 570 gpio = 4; 571 break; 572 } 573 gpio_request(gpio, ""); 574 gpio_direction_input(gpio); 575 printf("The user button is currently "); 576 if (gpio_get_value(gpio)) 577 { 578 button = 1; 579 printf("PRESSED.\n"); 580 } 581 else 582 { 583 button = 0; 584 printf("NOT pressed.\n"); 585 } 586 587 return !button; 588 } 589 590 /* -------------------------------------------------------------------- */ 591 592 U_BOOT_CMD( 593 userbutton, CONFIG_SYS_MAXARGS, 1, do_userbutton, 594 "Return the status of the BeagleBoard USER button", 595 "" 596 ); 597 #endif 598