1 /* 2 * (C) Copyright 2004-2008 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 <asm/io.h> 38 #include <asm/arch/mmc_host_def.h> 39 #include <asm/arch/mux.h> 40 #include <asm/arch/sys_proto.h> 41 #include <asm/arch/gpio.h> 42 #include <asm/mach-types.h> 43 #include "beagle.h" 44 45 #define TWL4030_I2C_BUS 0 46 #define EXPANSION_EEPROM_I2C_BUS 1 47 #define EXPANSION_EEPROM_I2C_ADDRESS 0x50 48 49 #define TINCANTOOLS_ZIPPY 0x01000100 50 #define TINCANTOOLS_ZIPPY2 0x02000100 51 #define TINCANTOOLS_TRAINER 0x04000100 52 #define TINCANTOOLS_SHOWDOG 0x03000100 53 #define KBADC_BEAGLEFPGA 0x01000600 54 55 #define BEAGLE_NO_EEPROM 0xffffffff 56 57 DECLARE_GLOBAL_DATA_PTR; 58 59 static struct { 60 unsigned int device_vendor; 61 unsigned char revision; 62 unsigned char content; 63 char fab_revision[8]; 64 char env_var[16]; 65 char env_setting[64]; 66 } expansion_config; 67 68 /* 69 * Routine: board_init 70 * Description: Early hardware init. 71 */ 72 int board_init(void) 73 { 74 gpmc_init(); /* in SRAM or SDRAM, finish GPMC */ 75 /* board id for Linux */ 76 gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE; 77 /* boot param addr */ 78 gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100); 79 80 #if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT) 81 status_led_set (STATUS_LED_BOOT, STATUS_LED_ON); 82 #endif 83 84 return 0; 85 } 86 87 /* 88 * Routine: get_board_revision 89 * Description: Detect if we are running on a Beagle revision Ax/Bx, 90 * C1/2/3, C4 or xM. This can be done by reading 91 * the level of GPIO173, GPIO172 and GPIO171. This should 92 * result in 93 * GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx 94 * GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3 95 * GPIO173, GPIO172, GPIO171: 1 0 1 => C4 96 * GPIO173, GPIO172, GPIO171: 0 0 0 => xM 97 */ 98 int get_board_revision(void) 99 { 100 int revision; 101 102 if (!omap_request_gpio(171) && 103 !omap_request_gpio(172) && 104 !omap_request_gpio(173)) { 105 106 omap_set_gpio_direction(171, 1); 107 omap_set_gpio_direction(172, 1); 108 omap_set_gpio_direction(173, 1); 109 110 revision = omap_get_gpio_datain(173) << 2 | 111 omap_get_gpio_datain(172) << 1 | 112 omap_get_gpio_datain(171); 113 114 omap_free_gpio(171); 115 omap_free_gpio(172); 116 omap_free_gpio(173); 117 } else { 118 printf("Error: unable to acquire board revision GPIOs\n"); 119 revision = -1; 120 } 121 122 return revision; 123 } 124 125 /* 126 * Routine: get_expansion_id 127 * Description: This function checks for expansion board by checking I2C 128 * bus 1 for the availability of an AT24C01B serial EEPROM. 129 * returns the device_vendor field from the EEPROM 130 */ 131 unsigned int get_expansion_id(void) 132 { 133 i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS); 134 135 /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */ 136 if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) { 137 i2c_set_bus_num(TWL4030_I2C_BUS); 138 return BEAGLE_NO_EEPROM; 139 } 140 141 /* read configuration data */ 142 i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config, 143 sizeof(expansion_config)); 144 145 i2c_set_bus_num(TWL4030_I2C_BUS); 146 147 return expansion_config.device_vendor; 148 } 149 150 /* 151 * Routine: misc_init_r 152 * Description: Configure board specific parts 153 */ 154 int misc_init_r(void) 155 { 156 struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE; 157 struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE; 158 struct control_prog_io *prog_io_base = (struct gpio *)OMAP34XX_CTRL_BASE; 159 160 /* Enable i2c2 pullup resisters */ 161 writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1); 162 163 switch (get_board_revision()) { 164 case REVISION_AXBX: 165 printf("Beagle Rev Ax/Bx\n"); 166 setenv("beaglerev", "AxBx"); 167 break; 168 case REVISION_CX: 169 printf("Beagle Rev C1/C2/C3\n"); 170 setenv("beaglerev", "Cx"); 171 MUX_BEAGLE_C(); 172 break; 173 case REVISION_C4: 174 printf("Beagle Rev C4\n"); 175 setenv("beaglerev", "C4"); 176 MUX_BEAGLE_C(); 177 /* Set VAUX2 to 1.8V for EHCI PHY */ 178 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 179 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 180 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 181 TWL4030_PM_RECEIVER_DEV_GRP_P1); 182 break; 183 case REVISION_XM_A: 184 printf("Beagle xM Rev A\n"); 185 setenv("beaglerev", "xMA"); 186 MUX_BEAGLE_XM(); 187 /* Set VAUX2 to 1.8V for EHCI PHY */ 188 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 189 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 190 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 191 TWL4030_PM_RECEIVER_DEV_GRP_P1); 192 break; 193 case REVISION_XM_B: 194 printf("Beagle xM Rev B\n"); 195 setenv("beaglerev", "xMB"); 196 MUX_BEAGLE_XM(); 197 /* Set VAUX2 to 1.8V for EHCI PHY */ 198 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 199 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 200 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 201 TWL4030_PM_RECEIVER_DEV_GRP_P1); 202 break; 203 default: 204 printf("Beagle unknown 0x%02x\n", get_board_revision()); 205 MUX_BEAGLE_XM(); 206 /* Set VAUX2 to 1.8V for EHCI PHY */ 207 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 208 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 209 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 210 TWL4030_PM_RECEIVER_DEV_GRP_P1); 211 } 212 213 switch (get_expansion_id()) { 214 case TINCANTOOLS_ZIPPY: 215 printf("Recognized Tincantools Zippy board (rev %d %s)\n", 216 expansion_config.revision, 217 expansion_config.fab_revision); 218 MUX_TINCANTOOLS_ZIPPY(); 219 setenv("buddy", "zippy"); 220 break; 221 case TINCANTOOLS_ZIPPY2: 222 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n", 223 expansion_config.revision, 224 expansion_config.fab_revision); 225 MUX_TINCANTOOLS_ZIPPY(); 226 setenv("buddy", "zippy2"); 227 break; 228 case TINCANTOOLS_TRAINER: 229 printf("Recognized Tincantools Trainer board (rev %d %s)\n", 230 expansion_config.revision, 231 expansion_config.fab_revision); 232 MUX_TINCANTOOLS_ZIPPY(); 233 MUX_TINCANTOOLS_TRAINER(); 234 setenv("buddy", "trainer"); 235 break; 236 case TINCANTOOLS_SHOWDOG: 237 printf("Recognized Tincantools Showdow board (rev %d %s)\n", 238 expansion_config.revision, 239 expansion_config.fab_revision); 240 /* Place holder for DSS2 definition for showdog lcd */ 241 setenv("defaultdisplay", "showdoglcd"); 242 setenv("buddy", "showdog"); 243 break; 244 case KBADC_BEAGLEFPGA: 245 printf("Recognized KBADC Beagle FPGA board\n"); 246 MUX_KBADC_BEAGLEFPGA(); 247 setenv("buddy", "beaglefpga"); 248 break; 249 case BEAGLE_NO_EEPROM: 250 printf("No EEPROM on expansion board\n"); 251 setenv("buddy", "none"); 252 break; 253 default: 254 printf("Unrecognized expansion board: %x\n", 255 expansion_config.device_vendor); 256 setenv("buddy", "unknown"); 257 } 258 259 if (expansion_config.content == 1) 260 setenv(expansion_config.env_var, expansion_config.env_setting); 261 262 twl4030_power_init(); 263 twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON); 264 265 /* Configure GPIOs to output */ 266 writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe); 267 writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 268 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe); 269 270 /* Set GPIOs */ 271 writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1, 272 &gpio6_base->setdataout); 273 writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 274 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout); 275 276 dieid_num_r(); 277 278 return 0; 279 } 280 281 /* 282 * Routine: set_muxconf_regs 283 * Description: Setting up the configuration Mux registers specific to the 284 * hardware. Many pins need to be moved from protect to primary 285 * mode. 286 */ 287 void set_muxconf_regs(void) 288 { 289 MUX_BEAGLE(); 290 } 291 292 #ifdef CONFIG_GENERIC_MMC 293 int board_mmc_init(bd_t *bis) 294 { 295 omap_mmc_init(0); 296 return 0; 297 } 298 #endif 299