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 BCT_BRETTL3 0x01000F00 75 #define BEAGLE_NO_EEPROM 0xffffffff 76 77 DECLARE_GLOBAL_DATA_PTR; 78 79 static struct { 80 unsigned int device_vendor; 81 unsigned char revision; 82 unsigned char content; 83 char fab_revision[8]; 84 char env_var[16]; 85 char env_setting[64]; 86 } expansion_config; 87 88 /* 89 * Routine: board_init 90 * Description: Early hardware init. 91 */ 92 int board_init(void) 93 { 94 gpmc_init(); /* in SRAM or SDRAM, finish GPMC */ 95 /* board id for Linux */ 96 gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE; 97 /* boot param addr */ 98 gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100); 99 100 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT) 101 status_led_set (STATUS_LED_BOOT, STATUS_LED_ON); 102 #endif 103 104 return 0; 105 } 106 107 /* 108 * Routine: get_board_revision 109 * Description: Detect if we are running on a Beagle revision Ax/Bx, 110 * C1/2/3, C4 or xM. This can be done by reading 111 * the level of GPIO173, GPIO172 and GPIO171. This should 112 * result in 113 * GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx 114 * GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3 115 * GPIO173, GPIO172, GPIO171: 1 0 1 => C4 116 * GPIO173, GPIO172, GPIO171: 0 0 0 => xM 117 */ 118 int get_board_revision(void) 119 { 120 int revision; 121 122 if (!gpio_request(171, "") && 123 !gpio_request(172, "") && 124 !gpio_request(173, "")) { 125 126 gpio_direction_input(171); 127 gpio_direction_input(172); 128 gpio_direction_input(173); 129 130 revision = gpio_get_value(173) << 2 | 131 gpio_get_value(172) << 1 | 132 gpio_get_value(171); 133 } else { 134 printf("Error: unable to acquire board revision GPIOs\n"); 135 revision = -1; 136 } 137 138 return revision; 139 } 140 141 #ifdef CONFIG_SPL_BUILD 142 /* 143 * Routine: get_board_mem_timings 144 * Description: If we use SPL then there is no x-loader nor config header 145 * so we have to setup the DDR timings ourself on both banks. 146 */ 147 void get_board_mem_timings(u32 *mcfg, u32 *ctrla, u32 *ctrlb, u32 *rfr_ctrl, 148 u32 *mr) 149 { 150 int pop_mfr, pop_id; 151 152 /* 153 * We need to identify what PoP memory is on the board so that 154 * we know what timings to use. If we can't identify it then 155 * we know it's an xM. To map the ID values please see nand_ids.c 156 */ 157 identify_nand_chip(&pop_mfr, &pop_id); 158 159 *mr = MICRON_V_MR_165; 160 switch (get_board_revision()) { 161 case REVISION_C4: 162 if (pop_mfr == NAND_MFR_STMICRO && pop_id == 0xba) { 163 /* 512MB DDR */ 164 *mcfg = NUMONYX_V_MCFG_165(512 << 20); 165 *ctrla = NUMONYX_V_ACTIMA_165; 166 *ctrlb = NUMONYX_V_ACTIMB_165; 167 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 168 break; 169 } else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xba) { 170 /* Beagleboard Rev C4, 512MB Nand/256MB DDR*/ 171 *mcfg = MICRON_V_MCFG_165(128 << 20); 172 *ctrla = MICRON_V_ACTIMA_165; 173 *ctrlb = MICRON_V_ACTIMB_165; 174 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 175 break; 176 } else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xbc) { 177 /* Beagleboard Rev C5, 256MB DDR */ 178 *mcfg = MICRON_V_MCFG_200(256 << 20); 179 *ctrla = MICRON_V_ACTIMA_200; 180 *ctrlb = MICRON_V_ACTIMB_200; 181 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz; 182 break; 183 } 184 case REVISION_XM_A: 185 case REVISION_XM_B: 186 case REVISION_XM_C: 187 if (pop_mfr == 0) { 188 /* 256MB DDR */ 189 *mcfg = MICRON_V_MCFG_200(256 << 20); 190 *ctrla = MICRON_V_ACTIMA_200; 191 *ctrlb = MICRON_V_ACTIMB_200; 192 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz; 193 } else { 194 /* 512MB DDR */ 195 *mcfg = NUMONYX_V_MCFG_165(512 << 20); 196 *ctrla = NUMONYX_V_ACTIMA_165; 197 *ctrlb = NUMONYX_V_ACTIMB_165; 198 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 199 } 200 break; 201 default: 202 /* Assume 128MB and Micron/165MHz timings to be safe */ 203 *mcfg = MICRON_V_MCFG_165(128 << 20); 204 *ctrla = MICRON_V_ACTIMA_165; 205 *ctrlb = MICRON_V_ACTIMB_165; 206 *rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz; 207 } 208 } 209 #endif 210 211 /* 212 * Routine: get_expansion_id 213 * Description: This function checks for expansion board by checking I2C 214 * bus 1 for the availability of an AT24C01B serial EEPROM. 215 * returns the device_vendor field from the EEPROM 216 */ 217 unsigned int get_expansion_id(void) 218 { 219 i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS); 220 221 /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */ 222 if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) { 223 i2c_set_bus_num(TWL4030_I2C_BUS); 224 return BEAGLE_NO_EEPROM; 225 } 226 227 /* read configuration data */ 228 i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config, 229 sizeof(expansion_config)); 230 231 i2c_set_bus_num(TWL4030_I2C_BUS); 232 233 return expansion_config.device_vendor; 234 } 235 236 /* 237 * Configure DSS to display background color on DVID 238 * Configure VENC to display color bar on S-Video 239 */ 240 void beagle_display_init(void) 241 { 242 omap3_dss_venc_config(&venc_config_std_tv, VENC_HEIGHT, VENC_WIDTH); 243 switch (get_board_revision()) { 244 case REVISION_AXBX: 245 case REVISION_CX: 246 case REVISION_C4: 247 omap3_dss_panel_config(&dvid_cfg); 248 break; 249 case REVISION_XM_A: 250 case REVISION_XM_B: 251 case REVISION_XM_C: 252 default: 253 omap3_dss_panel_config(&dvid_cfg_xm); 254 break; 255 } 256 } 257 258 /* 259 * Routine: misc_init_r 260 * Description: Configure board specific parts 261 */ 262 int misc_init_r(void) 263 { 264 struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE; 265 struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE; 266 struct control_prog_io *prog_io_base = (struct control_prog_io *)OMAP34XX_CTRL_BASE; 267 268 /* Enable i2c2 pullup resisters */ 269 writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1); 270 271 switch (get_board_revision()) { 272 case REVISION_AXBX: 273 printf("Beagle Rev Ax/Bx\n"); 274 setenv("beaglerev", "AxBx"); 275 break; 276 case REVISION_CX: 277 printf("Beagle Rev C1/C2/C3\n"); 278 setenv("beaglerev", "Cx"); 279 MUX_BEAGLE_C(); 280 break; 281 case REVISION_C4: 282 printf("Beagle Rev C4\n"); 283 setenv("beaglerev", "C4"); 284 MUX_BEAGLE_C(); 285 /* Set VAUX2 to 1.8V for EHCI PHY */ 286 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 287 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 288 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 289 TWL4030_PM_RECEIVER_DEV_GRP_P1); 290 break; 291 case REVISION_XM_A: 292 printf("Beagle xM Rev A\n"); 293 setenv("beaglerev", "xMA"); 294 MUX_BEAGLE_XM(); 295 /* Set VAUX2 to 1.8V for EHCI PHY */ 296 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 297 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 298 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 299 TWL4030_PM_RECEIVER_DEV_GRP_P1); 300 break; 301 case REVISION_XM_B: 302 printf("Beagle xM Rev B\n"); 303 setenv("beaglerev", "xMB"); 304 MUX_BEAGLE_XM(); 305 /* Set VAUX2 to 1.8V for EHCI PHY */ 306 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 307 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 308 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 309 TWL4030_PM_RECEIVER_DEV_GRP_P1); 310 break; 311 case REVISION_XM_C: 312 printf("Beagle xM Rev C\n"); 313 setenv("beaglerev", "xMC"); 314 MUX_BEAGLE_XM(); 315 /* Set VAUX2 to 1.8V for EHCI PHY */ 316 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 317 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 318 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 319 TWL4030_PM_RECEIVER_DEV_GRP_P1); 320 break; 321 default: 322 printf("Beagle unknown 0x%02x\n", get_board_revision()); 323 MUX_BEAGLE_XM(); 324 /* Set VAUX2 to 1.8V for EHCI PHY */ 325 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 326 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 327 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 328 TWL4030_PM_RECEIVER_DEV_GRP_P1); 329 } 330 331 switch (get_expansion_id()) { 332 case TINCANTOOLS_ZIPPY: 333 printf("Recognized Tincantools Zippy board (rev %d %s)\n", 334 expansion_config.revision, 335 expansion_config.fab_revision); 336 MUX_TINCANTOOLS_ZIPPY(); 337 setenv("buddy", "zippy"); 338 break; 339 case TINCANTOOLS_ZIPPY2: 340 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n", 341 expansion_config.revision, 342 expansion_config.fab_revision); 343 MUX_TINCANTOOLS_ZIPPY(); 344 setenv("buddy", "zippy2"); 345 break; 346 case TINCANTOOLS_TRAINER: 347 printf("Recognized Tincantools Trainer board (rev %d %s)\n", 348 expansion_config.revision, 349 expansion_config.fab_revision); 350 MUX_TINCANTOOLS_ZIPPY(); 351 MUX_TINCANTOOLS_TRAINER(); 352 setenv("buddy", "trainer"); 353 break; 354 case TINCANTOOLS_SHOWDOG: 355 printf("Recognized Tincantools Showdow board (rev %d %s)\n", 356 expansion_config.revision, 357 expansion_config.fab_revision); 358 /* Place holder for DSS2 definition for showdog lcd */ 359 setenv("defaultdisplay", "showdoglcd"); 360 setenv("buddy", "showdog"); 361 break; 362 case KBADC_BEAGLEFPGA: 363 printf("Recognized KBADC Beagle FPGA board\n"); 364 MUX_KBADC_BEAGLEFPGA(); 365 setenv("buddy", "beaglefpga"); 366 break; 367 case LW_BEAGLETOUCH: 368 printf("Recognized Liquidware BeagleTouch board\n"); 369 setenv("buddy", "beagletouch"); 370 break; 371 case BRAINMUX_LCDOG: 372 printf("Recognized Brainmux LCDog board\n"); 373 setenv("buddy", "lcdog"); 374 break; 375 case BRAINMUX_LCDOGTOUCH: 376 printf("Recognized Brainmux LCDog Touch board\n"); 377 setenv("buddy", "lcdogtouch"); 378 break; 379 case BBTOYS_WIFI: 380 printf("Recognized BeagleBoardToys WiFi board\n"); 381 MUX_BBTOYS_WIFI() 382 setenv("buddy", "bbtoys-wifi"); 383 break;; 384 case BBTOYS_VGA: 385 printf("Recognized BeagleBoardToys VGA board\n"); 386 break;; 387 case BBTOYS_LCD: 388 printf("Recognized BeagleBoardToys LCD board\n"); 389 break;; 390 case BCT_BRETTL3: 391 printf("Recognized bct electronic GmbH brettl3 board\n"); 392 break; 393 case BEAGLE_NO_EEPROM: 394 printf("No EEPROM on expansion board\n"); 395 setenv("buddy", "none"); 396 break; 397 default: 398 printf("Unrecognized expansion board: %x\n", 399 expansion_config.device_vendor); 400 setenv("buddy", "unknown"); 401 } 402 403 if (expansion_config.content == 1) 404 setenv(expansion_config.env_var, expansion_config.env_setting); 405 406 twl4030_power_init(); 407 switch (get_board_revision()) { 408 case REVISION_XM_A: 409 case REVISION_XM_B: 410 twl4030_led_init(TWL4030_LED_LEDEN_LEDBON); 411 break; 412 default: 413 twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON); 414 break; 415 } 416 417 /* Set GPIO states before they are made outputs */ 418 writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1, 419 &gpio6_base->setdataout); 420 writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 421 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout); 422 423 /* Configure GPIOs to output */ 424 writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe); 425 writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 426 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe); 427 428 dieid_num_r(); 429 beagle_display_init(); 430 omap3_dss_enable(); 431 432 return 0; 433 } 434 435 /* 436 * Routine: set_muxconf_regs 437 * Description: Setting up the configuration Mux registers specific to the 438 * hardware. Many pins need to be moved from protect to primary 439 * mode. 440 */ 441 void set_muxconf_regs(void) 442 { 443 MUX_BEAGLE(); 444 } 445 446 #if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD) 447 int board_mmc_init(bd_t *bis) 448 { 449 omap_mmc_init(0); 450 return 0; 451 } 452 #endif 453 454 #ifdef CONFIG_USB_EHCI 455 456 #define GPIO_PHY_RESET 147 457 458 /* Reset is needed otherwise the kernel-driver will throw an error. */ 459 int ehci_hcd_stop(void) 460 { 461 pr_debug("Resetting OMAP3 EHCI\n"); 462 gpio_set_value(GPIO_PHY_RESET, 0); 463 writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG); 464 /* disable USB clocks */ 465 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 466 sr32(&prcm_base->iclken_usbhost, 0, 1, 0); 467 sr32(&prcm_base->fclken_usbhost, 0, 2, 0); 468 sr32(&prcm_base->iclken3_core, 2, 1, 0); 469 sr32(&prcm_base->fclken3_core, 2, 1, 0); 470 return 0; 471 } 472 473 /* Call usb_stop() before starting the kernel */ 474 void show_boot_progress(int val) 475 { 476 if(val == 15) 477 usb_stop(); 478 } 479 480 /* 481 * Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard. 482 * Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37. 483 * See there for additional Copyrights. 484 */ 485 int ehci_hcd_init(void) 486 { 487 pr_debug("Initializing OMAP3 ECHI\n"); 488 489 /* Put the PHY in RESET */ 490 gpio_request(GPIO_PHY_RESET, ""); 491 gpio_direction_output(GPIO_PHY_RESET, 0); 492 gpio_set_value(GPIO_PHY_RESET, 0); 493 494 /* Hold the PHY in RESET for enough time till DIR is high */ 495 /* Refer: ISSUE1 */ 496 udelay(10); 497 498 struct prcm *prcm_base = (struct prcm *)PRCM_BASE; 499 /* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */ 500 sr32(&prcm_base->iclken_usbhost, 0, 1, 1); 501 /* 502 * Enable USBHOST_48M_FCLK (USBHOST_FCLK1) 503 * and USBHOST_120M_FCLK (USBHOST_FCLK2) 504 */ 505 sr32(&prcm_base->fclken_usbhost, 0, 2, 3); 506 /* Enable USBTTL_ICLK */ 507 sr32(&prcm_base->iclken3_core, 2, 1, 1); 508 /* Enable USBTTL_FCLK */ 509 sr32(&prcm_base->fclken3_core, 2, 1, 1); 510 pr_debug("USB clocks enabled\n"); 511 512 /* perform TLL soft reset, and wait until reset is complete */ 513 writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET, 514 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG); 515 /* Wait for TLL reset to complete */ 516 while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS) 517 & OMAP_USBTLL_SYSSTATUS_RESETDONE)); 518 pr_debug("TLL reset done\n"); 519 520 writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP | 521 OMAP_USBTLL_SYSCONFIG_SIDLEMODE | 522 OMAP_USBTLL_SYSCONFIG_CACTIVITY, 523 OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG); 524 525 /* Put UHH in NoIdle/NoStandby mode */ 526 writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP 527 | OMAP_UHH_SYSCONFIG_SIDLEMODE 528 | OMAP_UHH_SYSCONFIG_CACTIVITY 529 | OMAP_UHH_SYSCONFIG_MIDLEMODE, 530 OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG); 531 532 /* setup burst configurations */ 533 writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN 534 | OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN 535 | OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN, 536 OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG); 537 538 /* 539 * Refer ISSUE1: 540 * Hold the PHY in RESET for enough time till 541 * PHY is settled and ready 542 */ 543 udelay(10); 544 gpio_set_value(GPIO_PHY_RESET, 1); 545 546 hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE); 547 hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10); 548 549 pr_debug("OMAP3 EHCI init done\n"); 550 return 0; 551 } 552 553 #endif /* CONFIG_USB_EHCI */ 554 555 #ifndef CONFIG_SPL_BUILD 556 /* 557 * This command returns the status of the user button on beagle xM 558 * Input - none 559 * Returns - 1 if button is held down 560 * 0 if button is not held down 561 */ 562 int do_userbutton(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 563 { 564 int button = 0; 565 int gpio; 566 567 /* 568 * pass address parameter as argv[0] (aka command name), 569 * and all remaining args 570 */ 571 switch (get_board_revision()) { 572 case REVISION_AXBX: 573 case REVISION_CX: 574 case REVISION_C4: 575 gpio = 7; 576 break; 577 case REVISION_XM_A: 578 case REVISION_XM_B: 579 case REVISION_XM_C: 580 default: 581 gpio = 4; 582 break; 583 } 584 gpio_request(gpio, ""); 585 gpio_direction_input(gpio); 586 printf("The user button is currently "); 587 if (gpio_get_value(gpio)) 588 { 589 button = 1; 590 printf("PRESSED.\n"); 591 } 592 else 593 { 594 button = 0; 595 printf("NOT pressed.\n"); 596 } 597 598 return !button; 599 } 600 601 /* -------------------------------------------------------------------- */ 602 603 U_BOOT_CMD( 604 userbutton, CONFIG_SYS_MAXARGS, 1, do_userbutton, 605 "Return the status of the BeagleBoard USER button", 606 "" 607 ); 608 #endif 609