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Diffstat (limited to 'board/omap1510inn/lowlevel_init.S')
| -rw-r--r-- | board/omap1510inn/lowlevel_init.S | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/board/omap1510inn/lowlevel_init.S b/board/omap1510inn/lowlevel_init.S new file mode 100644 index 0000000..1c68e5b --- /dev/null +++ b/board/omap1510inn/lowlevel_init.S @@ -0,0 +1,396 @@ +/* + * Board specific setup info + * + * (C) Copyright 2003 + * Texas Instruments, <www.ti.com> + * + * -- Some bits of code used from rrload's head_OMAP1510.s -- + * Copyright (C) 2002 RidgeRun, Inc. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <config.h> +#include <version.h> + +#if defined(CONFIG_OMAP1510) +#include <./configs/omap1510.h> +#endif + +#define OMAP1510_CLKS ((1<<EN_XORPCK)|(1<<EN_PERCK)|(1<<EN_TIMCK)|(1<<EN_GPIOCK)) + + +_TEXT_BASE: + .word TEXT_BASE /* sdram load addr from config.mk */ + +.globl lowlevel_init +lowlevel_init: + + /* + * Configure 1510 pins functions to match our board. + */ + ldr r0, REG_PULL_DWN_CTRL_0 + ldr r1, VAL_PULL_DWN_CTRL_0 + str r1, [r0] + ldr r0, REG_PULL_DWN_CTRL_1 + ldr r1, VAL_PULL_DWN_CTRL_1 + str r1, [r0] + ldr r0, REG_PULL_DWN_CTRL_2 + ldr r1, VAL_PULL_DWN_CTRL_2 + str r1, [r0] + ldr r0, REG_PULL_DWN_CTRL_3 + ldr r1, VAL_PULL_DWN_CTRL_3 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_4 + ldr r1, VAL_FUNC_MUX_CTRL_4 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_5 + ldr r1, VAL_FUNC_MUX_CTRL_5 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_6 + ldr r1, VAL_FUNC_MUX_CTRL_6 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_7 + ldr r1, VAL_FUNC_MUX_CTRL_7 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_8 + ldr r1, VAL_FUNC_MUX_CTRL_8 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_9 + ldr r1, VAL_FUNC_MUX_CTRL_9 + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_A + ldr r1, VAL_FUNC_MUX_CTRL_A + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_B + ldr r1, VAL_FUNC_MUX_CTRL_B + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_C + ldr r1, VAL_FUNC_MUX_CTRL_C + str r1, [r0] + ldr r0, REG_FUNC_MUX_CTRL_D + ldr r1, VAL_FUNC_MUX_CTRL_D + str r1, [r0] + ldr r0, REG_VOLTAGE_CTRL_0 + ldr r1, VAL_VOLTAGE_CTRL_0 + str r1, [r0] + ldr r0, REG_TEST_DBG_CTRL_0 + ldr r1, VAL_TEST_DBG_CTRL_0 + str r1, [r0] + ldr r0, REG_MOD_CONF_CTRL_0 + ldr r1, VAL_MOD_CONF_CTRL_0 + str r1, [r0] + + /* Move to 1510 mode */ + ldr r0, REG_COMP_MODE_CTRL_0 + ldr r1, VAL_COMP_MODE_CTRL_0 + str r1, [r0] + + /* Set up Traffic Ctlr*/ + ldr r0, REG_TC_IMIF_PRIO + mov r1, #0x0 + str r1, [r0] + ldr r0, REG_TC_EMIFS_PRIO + str r1, [r0] + ldr r0, REG_TC_EMIFF_PRIO + str r1, [r0] + + ldr r0, REG_TC_EMIFS_CONFIG + ldr r1, [r0] + bic r1, r1, #0x08 /* clear the global power-down enable PDE bit */ + bic r1, r1, #0x01 /* write protect flash by clearing the WP bit */ + str r1, [r0] /* EMIFS GlB Configuration. (value 0x12 most likely) */ + + /* Setup some clock domains */ + ldr r1, =OMAP1510_CLKS + ldr r0, REG_ARM_IDLECT2 + strh r1, [r0] /* CLKM, Clock domain control. */ + + mov r1, #0x01 /* PER_EN bit */ + ldr r0, REG_ARM_RSTCT2 + strh r1, [r0] /* CLKM; Peripheral reset. */ + + /* Set CLKM to Sync-Scalable */ + /* I supposidly need to enable the dsp clock before switching */ + mov r1, #0x1000 + ldr r0, REG_ARM_SYSST + strh r1, [r0] + mov r0, #0x400 +1: + subs r0, r0, #0x1 /* wait for any bubbles to finish */ + bne 1b + + ldr r1, VAL_ARM_CKCTL /* use 12Mhz ref, PER must be <= 50Mhz so /2 */ + ldr r0, REG_ARM_CKCTL + strh r1, [r0] + + /* setup DPLL 1 */ + ldr r1, VAL_DPLL1_CTL + ldr r0, REG_DPLL1_CTL + strh r1, [r0] + ands r1, r1, #0x10 /* Check if PLL is enabled. */ + beq lock_end /* Do not look for lock if BYPASS selected */ +2: + ldrh r1, [r0] + ands r1, r1, #0x01 /* Check the LOCK bit. */ + beq 2b /* ...loop until bit goes hi. */ +lock_end: + + /* Set memory timings corresponding to the new clock speed */ + + /* Check execution location to determine current execution location + * and branch to appropriate initialization code. + */ + mov r0, #0x10000000 /* Load physical SDRAM base. */ + mov r1, pc /* Get current execution location. */ + /* Zero all but top 6 bits of PC, as they alone detect whether an + * address is in the range 0x1000:0000-0x13ff:ffff, the 64M sized + * valid range for SDRAM on the OMAP 1510/5910. + */ + and r1, r1, #0xfc000000 + cmp r1, r0 /* Compare. */ + beq skip_sdram /* Skip over EMIF-fast initialization + * if running from SDRAM. + */ + + /* + * Delay for SDRAM initialization. + */ + mov r3, #0x1800 /* value should be checked */ +3: + subs r3, r3, #0x1 /* Decrement count */ + bne 3b + + /* + * Set SDRAM control values. Disable refresh before MRS command. + */ + ldr r0, VAL_TC_EMIFF_SDRAM_CONFIG /* get good value */ + bic r3, r0, #0xC /* (BIT3|BIT2) ulConfig with auto-refresh disabled. */ + orr r3, r3, #0x8000000 /* (BIT27) Disable CLK when Power down or Self-Refresh */ + orr r3, r3, #0x4000000 /* BIT26 Power Down Enable */ + ldr r2, REG_TC_EMIFF_SDRAM_CONFIG /* Point to configuration register. */ + str r3, [r2] /* Store the passed value with AR disabled. */ + + ldr r1, VAL_TC_EMIFF_MRS /* get MRS value */ + ldr r2, REG_TC_EMIFF_MRS /* Point to MRS register. */ + str r1, [r2] /* Store the passed value.*/ + + ldr r2, REG_TC_EMIFF_SDRAM_CONFIG /* Point to configuration register. */ + str r0, [r2] /* Store the passed value. */ + + /* + * Delay for SDRAM initialization. + */ + mov r3, #0x1800 +4: + subs r3, r3, #1 /* Decrement count. */ + bne 4b + +skip_sdram: + + /* slow interface */ + ldr r1, VAL_TC_EMIFS_CS0_CONFIG + ldr r0, REG_TC_EMIFS_CS0_CONFIG + str r1, [r0] /* Chip Select 0 */ + ldr r1, VAL_TC_EMIFS_CS1_CONFIG + ldr r0, REG_TC_EMIFS_CS1_CONFIG + str r1, [r0] /* Chip Select 1 */ + ldr r1, VAL_TC_EMIFS_CS2_CONFIG + ldr r0, REG_TC_EMIFS_CS2_CONFIG + str r1, [r0] /* Chip Select 2 */ + ldr r1, VAL_TC_EMIFS_CS3_CONFIG + ldr r0, REG_TC_EMIFS_CS3_CONFIG + str r1, [r0] /* Chip Select 3 */ + + /* Next, Enable the RS232 Line Drivers in the FPGA. */ + /* Also, power on the audio CODEC's amplifier here, */ + /* which will make a noise on the audio output. */ + /* This is done here instead of in the kernel so there */ + /* isn't a loud popping noise at the start of each */ + /* song. */ + /* Also, disable the CODEC's clocks. */ + /* omap1510-HelenP1 [specific] */ + + ldr r0, REG_FPGA_POWER + mov r1, #0 + ldr r2, REG_FPGA_DIP_SWITCH + ldrb r3, [r2] + cmp r3, #0x8 + movne r1, #0x62 /* Enable the RS232 Line Drivers in the EPLD */ + strb r1, [r0] + ldr r0, REG_FPGA_AUDIO + mov r1, #0x0 /* Disable sound driver (CODEC clocks) */ + strb r1, [r0] + + /* back to arch calling code */ + mov pc, lr + +/* the literal pools origin */ + .ltorg + +/* OMAP configuration registers */ +REG_FUNC_MUX_CTRL_0: /* 32 bits */ + .word 0xfffe1000 +REG_FUNC_MUX_CTRL_1: /* 32 bits */ + .word 0xfffe1004 +REG_FUNC_MUX_CTRL_2: /* 32 bits */ + .word 0xfffe1008 +REG_COMP_MODE_CTRL_0: /* 32 bits */ + .word 0xfffe100c +REG_FUNC_MUX_CTRL_3: /* 32 bits */ + .word 0xfffe1010 +REG_FUNC_MUX_CTRL_4: /* 32 bits */ + .word 0xfffe1014 +REG_FUNC_MUX_CTRL_5: /* 32 bits */ + .word 0xfffe1018 +REG_FUNC_MUX_CTRL_6: /* 32 bits */ + .word 0xfffe101c +REG_FUNC_MUX_CTRL_7: /* 32 bits */ + .word 0xfffe1020 +REG_FUNC_MUX_CTRL_8: /* 32 bits */ + .word 0xfffe1024 +REG_FUNC_MUX_CTRL_9: /* 32 bits */ + .word 0xfffe1028 +REG_FUNC_MUX_CTRL_A: /* 32 bits */ + .word 0xfffe102C +REG_FUNC_MUX_CTRL_B: /* 32 bits */ + .word 0xfffe1030 +REG_FUNC_MUX_CTRL_C: /* 32 bits */ + .word 0xfffe1034 +REG_FUNC_MUX_CTRL_D: /* 32 bits */ + .word 0xfffe1038 +REG_PULL_DWN_CTRL_0: /* 32 bits */ + .word 0xfffe1040 +REG_PULL_DWN_CTRL_1: /* 32 bits */ + .word 0xfffe1044 +REG_PULL_DWN_CTRL_2: /* 32 bits */ + .word 0xfffe1048 +REG_PULL_DWN_CTRL_3: /* 32 bits */ + .word 0xfffe104c +REG_VOLTAGE_CTRL_0: /* 32 bits */ + .word 0xfffe1060 +REG_TEST_DBG_CTRL_0: /* 32 bits */ + .word 0xfffe1070 +REG_MOD_CONF_CTRL_0: /* 32 bits */ + .word 0xfffe1080 +REG_TC_IMIF_PRIO: /* 32 bits */ + .word 0xfffecc00 +REG_TC_EMIFS_PRIO: /* 32 bits */ + .word 0xfffecc04 +REG_TC_EMIFF_PRIO: /* 32 bits */ + .word 0xfffecc08 +REG_TC_EMIFS_CONFIG: /* 32 bits */ + .word 0xfffecc0c +REG_TC_EMIFS_CS0_CONFIG: /* 32 bits */ + .word 0xfffecc10 +REG_TC_EMIFS_CS1_CONFIG: /* 32 bits */ + .word 0xfffecc14 +REG_TC_EMIFS_CS2_CONFIG: /* 32 bits */ + .word 0xfffecc18 +REG_TC_EMIFS_CS3_CONFIG: /* 32 bits */ + .word 0xfffecc1c +REG_TC_EMIFF_SDRAM_CONFIG: /* 32 bits */ + .word 0xfffecc20 +REG_TC_EMIFF_MRS: /* 32 bits */ + .word 0xfffecc24 +/* MPU clock/reset/power mode control registers */ +REG_ARM_CKCTL: /* 16 bits */ + .word 0xfffece00 +REG_ARM_IDLECT2: /* 16 bits */ + .word 0xfffece08 +REG_ARM_RSTCT2: /* 16 bits */ + .word 0xfffece14 +REG_ARM_SYSST: /* 16 bits */ + .word 0xfffece18 +/* DPLL control registers */ +REG_DPLL1_CTL: /* 16 bits */ + .word 0xfffecf00 +/* identification code register */ +REG_IDCODE: /* 32 bits */ + .word 0xfffed404 + +/* Innovator specific */ +REG_FPGA_LED_DIGIT: /* 8 bits (not used on Innovator) */ + .word 0x08000003 +REG_FPGA_POWER: /* 8 bits */ + .word 0x08000005 +REG_FPGA_AUDIO: /* 8 bits (not used on Innovator) */ + .word 0x0800000c +REG_FPGA_DIP_SWITCH: /* 8 bits (not used on Innovator) */ + .word 0x0800000e + +VAL_COMP_MODE_CTRL_0: + .word 0x0000eaef +VAL_FUNC_MUX_CTRL_4: + .word 0x00000000 +VAL_FUNC_MUX_CTRL_5: + .word 0x00000000 +VAL_FUNC_MUX_CTRL_6: + .word 0x00000001 +VAL_FUNC_MUX_CTRL_7: + .word 0x00000000 +VAL_FUNC_MUX_CTRL_8: + .word 0x10001200 +VAL_FUNC_MUX_CTRL_9: + .word 0x01201012 +VAL_FUNC_MUX_CTRL_A: + .word 0x00000248 +VAL_FUNC_MUX_CTRL_B: + .word 0x00000248 +VAL_FUNC_MUX_CTRL_C: + .word 0x09000000 +VAL_FUNC_MUX_CTRL_D: + .word 0x00000000 +VAL_PULL_DWN_CTRL_0: + .word 0x11a10000 +VAL_PULL_DWN_CTRL_1: + .word 0x2e047fff +VAL_PULL_DWN_CTRL_2: + .word 0xffd603a6 +VAL_PULL_DWN_CTRL_3: + .word 0x00003e03 +VAL_VOLTAGE_CTRL_0: + .word 0x00000007 +VAL_TEST_DBG_CTRL_0: + /* See Errata 4.13, This works around a SRAM bug, for chips below ES2.5 . + * This slows down internal SRAM accesses. + */ + .word 0x00000007 +VAL_MOD_CONF_CTRL_0: + .word 0x0b000008 +VAL_ARM_CKCTL: + .word 0x010f +VAL_DPLL1_CTL: + .word 0x2710 +VAL_TC_EMIFS_CS1_CONFIG_PRELIM: + .word 0x00001149 +VAL_TC_EMIFS_CS2_CONFIG_PRELIM: + .word 0x00004158 +VAL_TC_EMIFS_CS0_CONFIG: + .word 0x002130b0 +VAL_TC_EMIFS_CS1_CONFIG: + .word 0x0000f559 +VAL_TC_EMIFS_CS2_CONFIG: + .word 0x000055f0 +VAL_TC_EMIFS_CS3_CONFIG: + .word 0x00003331 +VAL_TC_EMIFF_SDRAM_CONFIG: + .word 0x010290fc +VAL_TC_EMIFF_MRS: + .word 0x00000027 |