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 #include <twl4030.h> 34 #include <asm/io.h> 35 #include <asm/arch/mmc_host_def.h> 36 #include <asm/arch/mux.h> 37 #include <asm/arch/sys_proto.h> 38 #include <asm/arch/gpio.h> 39 #include <asm/mach-types.h> 40 #include "beagle.h" 41 42 #define TWL4030_I2C_BUS 0 43 #define EXPANSION_EEPROM_I2C_BUS 1 44 #define EXPANSION_EEPROM_I2C_ADDRESS 0x50 45 46 #define TINCANTOOLS_ZIPPY 0x01000100 47 #define TINCANTOOLS_ZIPPY2 0x02000100 48 #define TINCANTOOLS_TRAINER 0x04000100 49 #define TINCANTOOLS_SHOWDOG 0x03000100 50 #define KBADC_BEAGLEFPGA 0x01000600 51 52 #define BEAGLE_NO_EEPROM 0xffffffff 53 54 DECLARE_GLOBAL_DATA_PTR; 55 56 static struct { 57 unsigned int device_vendor; 58 unsigned char revision; 59 unsigned char content; 60 char fab_revision[8]; 61 char env_var[16]; 62 char env_setting[64]; 63 } expansion_config; 64 65 /* 66 * Routine: board_init 67 * Description: Early hardware init. 68 */ 69 int board_init(void) 70 { 71 gpmc_init(); /* in SRAM or SDRAM, finish GPMC */ 72 /* board id for Linux */ 73 gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE; 74 /* boot param addr */ 75 gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100); 76 77 return 0; 78 } 79 80 /* 81 * Routine: get_board_revision 82 * Description: Detect if we are running on a Beagle revision Ax/Bx, 83 * C1/2/3, C4 or xM. This can be done by reading 84 * the level of GPIO173, GPIO172 and GPIO171. This should 85 * result in 86 * GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx 87 * GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3 88 * GPIO173, GPIO172, GPIO171: 1 0 1 => C4 89 * GPIO173, GPIO172, GPIO171: 0 0 0 => xM 90 */ 91 int get_board_revision(void) 92 { 93 int revision; 94 95 if (!omap_request_gpio(171) && 96 !omap_request_gpio(172) && 97 !omap_request_gpio(173)) { 98 99 omap_set_gpio_direction(171, 1); 100 omap_set_gpio_direction(172, 1); 101 omap_set_gpio_direction(173, 1); 102 103 revision = omap_get_gpio_datain(173) << 2 | 104 omap_get_gpio_datain(172) << 1 | 105 omap_get_gpio_datain(171); 106 107 omap_free_gpio(171); 108 omap_free_gpio(172); 109 omap_free_gpio(173); 110 } else { 111 printf("Error: unable to acquire board revision GPIOs\n"); 112 revision = -1; 113 } 114 115 return revision; 116 } 117 118 /* 119 * Routine: get_expansion_id 120 * Description: This function checks for expansion board by checking I2C 121 * bus 1 for the availability of an AT24C01B serial EEPROM. 122 * returns the device_vendor field from the EEPROM 123 */ 124 unsigned int get_expansion_id(void) 125 { 126 i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS); 127 128 /* return BEAGLE_NO_EEPROM if eeprom doesn't respond */ 129 if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) { 130 i2c_set_bus_num(TWL4030_I2C_BUS); 131 return BEAGLE_NO_EEPROM; 132 } 133 134 /* read configuration data */ 135 i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config, 136 sizeof(expansion_config)); 137 138 i2c_set_bus_num(TWL4030_I2C_BUS); 139 140 return expansion_config.device_vendor; 141 } 142 143 /* 144 * Routine: misc_init_r 145 * Description: Configure board specific parts 146 */ 147 int misc_init_r(void) 148 { 149 struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE; 150 struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE; 151 152 switch (get_board_revision()) { 153 case REVISION_AXBX: 154 printf("Beagle Rev Ax/Bx\n"); 155 setenv("beaglerev", "AxBx"); 156 setenv("mpurate", "600"); 157 break; 158 case REVISION_CX: 159 printf("Beagle Rev C1/C2/C3\n"); 160 setenv("beaglerev", "Cx"); 161 setenv("mpurate", "600"); 162 MUX_BEAGLE_C(); 163 break; 164 case REVISION_C4: 165 printf("Beagle Rev C4\n"); 166 setenv("beaglerev", "C4"); 167 setenv("mpurate", "720"); 168 MUX_BEAGLE_C(); 169 /* Set VAUX2 to 1.8V for EHCI PHY */ 170 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 171 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 172 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 173 TWL4030_PM_RECEIVER_DEV_GRP_P1); 174 break; 175 case REVISION_XM: 176 printf("Beagle xM Rev A\n"); 177 setenv("beaglerev", "xMA"); 178 setenv("mpurate", "1000"); 179 MUX_BEAGLE_XM(); 180 /* Set VAUX2 to 1.8V for EHCI PHY */ 181 twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED, 182 TWL4030_PM_RECEIVER_VAUX2_VSEL_18, 183 TWL4030_PM_RECEIVER_VAUX2_DEV_GRP, 184 TWL4030_PM_RECEIVER_DEV_GRP_P1); 185 break; 186 default: 187 printf("Beagle unknown 0x%02x\n", get_board_revision()); 188 } 189 190 switch (get_expansion_id()) { 191 case TINCANTOOLS_ZIPPY: 192 printf("Recognized Tincantools Zippy board (rev %d %s)\n", 193 expansion_config.revision, 194 expansion_config.fab_revision); 195 MUX_TINCANTOOLS_ZIPPY(); 196 setenv("buddy", "zippy"); 197 break; 198 case TINCANTOOLS_ZIPPY2: 199 printf("Recognized Tincantools Zippy2 board (rev %d %s)\n", 200 expansion_config.revision, 201 expansion_config.fab_revision); 202 MUX_TINCANTOOLS_ZIPPY(); 203 setenv("buddy", "zippy2"); 204 break; 205 case TINCANTOOLS_TRAINER: 206 printf("Recognized Tincantools Trainer board (rev %d %s)\n", 207 expansion_config.revision, 208 expansion_config.fab_revision); 209 MUX_TINCANTOOLS_ZIPPY(); 210 MUX_TINCANTOOLS_TRAINER(); 211 setenv("buddy", "trainer"); 212 break; 213 case TINCANTOOLS_SHOWDOG: 214 printf("Recognized Tincantools Showdow board (rev %d %s)\n", 215 expansion_config.revision, 216 expansion_config.fab_revision); 217 /* Place holder for DSS2 definition for showdog lcd */ 218 setenv("defaultdisplay", "showdoglcd"); 219 setenv("buddy", "showdog"); 220 break; 221 case KBADC_BEAGLEFPGA: 222 printf("Recognized KBADC Beagle FPGA board\n"); 223 MUX_KBADC_BEAGLEFPGA(); 224 setenv("buddy", "beaglefpga"); 225 break; 226 case BEAGLE_NO_EEPROM: 227 printf("No EEPROM on expansion board\n"); 228 setenv("buddy", "none"); 229 break; 230 default: 231 printf("Unrecognized expansion board: %x\n", 232 expansion_config.device_vendor); 233 setenv("buddy", "unknown"); 234 } 235 236 if (expansion_config.content == 1) 237 setenv(expansion_config.env_var, expansion_config.env_setting); 238 239 twl4030_power_init(); 240 twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON); 241 242 /* Configure GPIOs to output */ 243 writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe); 244 writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 245 GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe); 246 247 /* Set GPIOs */ 248 writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1, 249 &gpio6_base->setdataout); 250 writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 | 251 GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout); 252 253 dieid_num_r(); 254 255 return 0; 256 } 257 258 /* 259 * Routine: set_muxconf_regs 260 * Description: Setting up the configuration Mux registers specific to the 261 * hardware. Many pins need to be moved from protect to primary 262 * mode. 263 */ 264 void set_muxconf_regs(void) 265 { 266 MUX_BEAGLE(); 267 } 268 269 #ifdef CONFIG_GENERIC_MMC 270 int board_mmc_init(bd_t *bis) 271 { 272 omap_mmc_init(0); 273 return 0; 274 } 275 #endif 276