/* * Board specific setup info * * (C) Copyright 2004 Ales Jindra * (C) Copyright 2005 Ladislav Michl * * 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 #include _TEXT_BASE: .word TEXT_BASE /* SDRAM load addr from config.mk */ OMAP5910_LPG1_BASE: .word 0xfffbd000 OMAP5910_TIPB_SWITCHES_BASE: .word 0xfffbc800 OMAP5910_MPU_TC_BASE: .word 0xfffecc00 OMAP5910_MPU_CLKM_BASE: .word 0xfffece00 OMAP5910_ULPD_PWR_MNG_BASE: .word 0xfffe0800 OMAP5910_DPLL1_BASE: .word 0xfffecf00 OMAP5910_GPIO_BASE: .word 0xfffce000 OMAP5910_MPU_WD_TIMER_BASE: .word 0xfffec800 OMAP5910_MPUI_BASE: .word 0xfffec900 _OMAP5910_ARM_CKCTL: .word OMAP5910_ARM_CKCTL _OMAP5910_ARM_EN_CLK: .word OMAP5910_ARM_EN_CLK OMAP5910_MPUI_CTRL: .word 0x0000ff1b VAL_EMIFS_CS0_CONFIG: .word 0x00009090 VAL_EMIFS_CS1_CONFIG: .word 0x00003031 VAL_EMIFS_CS2_CONFIG: .word 0x0000a0a1 VAL_EMIFS_CS3_CONFIG: .word 0x0000c0c0 VAL_EMIFS_DYN_WAIT: .word 0x00000000 /* autorefresh counter 0x246 ((64000000/13.4)-400)/8192) */ /* SLRF SD_RET ARE SDRAM_TYPE ARCV SDRAM_FREQUENCY PWD CLK */ #if (PHYS_SDRAM_1_SIZE == SZ_32M) VAL_EMIFF_SDRAM_CONFIG: .word ((0 << 0) | (0 << 1) | (3 << 2) | (0xf << 4) | (0x246 << 8) | (0 << 24) | (0 << 26) | (0 << 27)) #else VAL_EMIFF_SDRAM_CONFIG: .word ((0 << 0) | (0 << 1) | (3 << 2) | (0xd << 4) | (0x246 << 8) | (0 << 24) | (0 << 26) | (0 << 27)) #endif VAL_EMIFF_SDRAM_CONFIG2: .word 0x00000003 VAL_EMIFF_MRS: .word 0x00000037 /* * GPIO04 - Green LED (Red LED is connected to LED Pulse Generator) * GPIO07 - LAN91C111 reset */ GPIO_DIRECTION: .word 0x0000ff6f /* * Disable everything (green LED is connected via invertor) */ GPIO_OUTPUT: .word 0x00000010 MUX_CONFIG_BASE: .word 0xfffe1000 MUX_CONFIG_VALUES: .align 4 .word 0x00000000 @ FUNC_MUX_CTRL_0 .word 0x00000000 @ FUNC_MUX_CTRL_1 .word 0x00000000 @ FUNC_MUX_CTRL_2 .word 0x00000000 @ FUNC_MUX_CTRL_3 .word 0x00000000 @ FUNC_MUX_CTRL_4 .word 0x02080480 @ FUNC_MUX_CTRL_5 .word 0x0100001c @ FUNC_MUX_CTRL_6 .word 0x0004800b @ FUNC_MUX_CTRL_7 .word 0x10001200 @ FUNC_MUX_CTRL_8 .word 0x01201012 @ FUNC_MUX_CTRL_9 .word 0x02082248 @ FUNC_MUX_CTRL_A .word 0x00000248 @ FUNC_MUX_CTRL_B .word 0x12240000 @ FUNC_MUX_CTRL_C .word 0x00002000 @ FUNC_MUX_CTRL_D .word 0x00000000 @ PULL_DWN_CTRL_0 .word 0x00000800 @ PULL_DWN_CTRL_1 .word 0x01801000 @ PULL_DWN_CTRL_2 .word 0x00000000 @ PULL_DWN_CTRL_3 .word 0x00000000 @ GATE_INH_CTRL_0 .word 0x00000000 @ VOLTAGE_CTRL_0 .word 0x00000000 @ TEST_DBG_CTRL_0 .word 0x00000006 @ MOD_CONF_CTRL_0 .word 0x0000eaef @ COMP_MODE_CTRL_0 MUX_CONFIG_OFFSETS: .align 1 .byte 0x00 @ FUNC_MUX_CTRL_0 .byte 0x04 @ FUNC_MUX_CTRL_1 .byte 0x08 @ FUNC_MUX_CTRL_2 .byte 0x10 @ FUNC_MUX_CTRL_3 .byte 0x14 @ FUNC_MUX_CTRL_4 .byte 0x18 @ FUNC_MUX_CTRL_5 .byte 0x1c @ FUNC_MUX_CTRL_6 .byte 0x20 @ FUNC_MUX_CTRL_7 .byte 0x24 @ FUNC_MUX_CTRL_8 .byte 0x28 @ FUNC_MUX_CTRL_9 .byte 0x2c @ FUNC_MUX_CTRL_A .byte 0x30 @ FUNC_MUX_CTRL_B .byte 0x34 @ FUNC_MUX_CTRL_C .byte 0x38 @ FUNC_MUX_CTRL_D .byte 0x40 @ PULL_DWN_CTRL_0 .byte 0x44 @ PULL_DWN_CTRL_1 .byte 0x48 @ PULL_DWN_CTRL_2 .byte 0x4c @ PULL_DWN_CTRL_3 .byte 0x50 @ GATE_INH_CTRL_0 .byte 0x60 @ VOLTAGE_CTRL_0 .byte 0x70 @ TEST_DBG_CTRL_0 .byte 0x80 @ MOD_CONF_CTRL_0 .byte 0x0c @ COMP_MODE_CTRL_0 .byte 0xff .globl lowlevel_init lowlevel_init: /* Improve performance a bit... */ mrc p15, 0, r1, c0, c0, 0 @ read C15 ID register mrc p15, 0, r1, c0, c0, 1 @ read C15 Cache information register mrc p15, 0, r1, c1, c0, 0 @ read C15 Control register orr r1, r1, #0x1000 @ enable I-cache, map interrupt vector 0xffff0000 mcr p15, 0, r1, c1, c0, 0 @ write C15 Control register mov r1, #0x00 mcr p15, 0, r1, c7, c5, 0 @ Flush I-cache nop nop nop nop /* Setup clocking mode */ ldr r0, OMAP5910_MPU_CLKM_BASE @ prepare base of CLOCK unit ldrh r1, [r0, #0x18] @ get reset status bic r1, r1, #(7 << 11) @ clear clock select orr r1, r1, #(2 << 11) @ set synchronous scalable mov r2, #0 @ set wait counter to 100 clock cycles icache_loop: cmp r2, #0x01 streqh r1, [r0, #0x18] add r2, r2, #0x01 cmp r2, #0x10 bne icache_loop nop /* Setup clock divisors */ ldr r0, OMAP5910_MPU_CLKM_BASE @ base of CLOCK unit ldr r1, _OMAP5910_ARM_CKCTL orr r1, r1, #0x2000 @ enable DSP clock strh r1, [r0, #0x00] @ setup clock divisors /* Setup DPLL to generate requested freq */ ldr r0, OMAP5910_DPLL1_BASE @ base of DPLL1 register mov r1, #0x0010 @ set PLL_ENABLE orr r1, r1, #0x2000 @ set IOB to new locking orr r1, r1, #(OMAP5910_DPLL_MUL << 7) @ setup multiplier CLKREF orr r1, r1, #(OMAP5910_DPLL_DIV << 5) @ setup divider CLKREF strh r1, [r0] @ write locking: ldrh r1, [r0] @ get DPLL value tst r1, #0x01 beq locking @ while LOCK not set /* Enable clock */ ldr r0, OMAP5910_MPU_CLKM_BASE @ base of CLOCK unit mov r1, #(1 << 10) @ disable idle mode do not check @ nWAKEUP pin, other remain active strh r1, [r0, #0x04] ldr r1, _OMAP5910_ARM_EN_CLK strh r1, [r0, #0x08] mov r1, #0x003f @ FLASH.RP not enabled in idle and @ max delayed ( 32 x CLKIN ) strh r1, [r0, #0x0c] /* Configure 5910 pins functions to match our board. */ ldr r0, MUX_CONFIG_BASE adr r1, MUX_CONFIG_VALUES adr r2, MUX_CONFIG_OFFSETS next_mux_cfg: ldrb r3, [r2], #1 ldr r4, [r1], #4 cmp r3, #0xff strne r4, [r0, r3] bne next_mux_cfg /* Configure GPIO pins (also disables Green LED) */ ldr r0, OMAP5910_GPIO_BASE ldr r1, GPIO_OUTPUT strh r1, [r0, #0x04] ldr r1, GPIO_DIRECTION strh r1, [r0, #0x08] /* EnablePeripherals */ ldr r0, OMAP5910_MPU_CLKM_BASE @ CLOCK unit mov r1, #0x0001 @ Peripheral enable strh r1, [r0, #0x14] /* Program LED Pulse Generator */ ldr r0, OMAP5910_LPG1_BASE @ 1st LED Pulse Generator mov r1, #0x7F @ Set obscure frequency in strb r1, [r0, #0x00] @ LCR mov r1, #0x01 @ Enable clock (CLK_EN) in strb r1, [r0, #0x04] @ PMR /* TIPB Lock UART1 */ ldr r0, OMAP5910_TIPB_SWITCHES_BASE @ prepare base of TIPB switches mov r1, #1 @ ARM allocated strh r1, [r0,#0x04] @ clear IRQ line and status bits strh r1, [r0,#0x00] ldrh r1, [r0,#0x04] /* Disable watchdog */ ldr r0, OMAP5910_MPU_WD_TIMER_BASE mov r1, #0xf5 strh r1, [r0, #0x8] mov r1, #0xa0 strh r1, [r0, #0x8] /* Enable MCLK */ ldr r0, OMAP5910_ULPD_PWR_MNG_BASE mov r1, #0x6 strh r1, [r0, #0x34] strh r1, [r0, #0x34] /* Setup clock divisors */ ldr r0, OMAP5910_ULPD_PWR_MNG_BASE @ base of ULDPL DPLL1 register mov r1, #0x0010 @ set PLL_ENABLE orr r1, r1, #0x2000 @ set IOB to new locking strh r1, [r0] @ write ulocking: ldrh r1, [r0] @ get DPLL value tst r1, #1 beq ulocking @ while LOCK not set /* EMIF init */ ldr r0, OMAP5910_MPU_TC_BASE ldrh r1, [r0, #0x0c] @ EMIFS_CONFIG_REG bic r1, r1, #0x0c @ pwr down disabled, flash WP orr r1, r1, #0x01 str r1, [r0, #0x0c] ldr r1, VAL_EMIFS_CS0_CONFIG str r1, [r0, #0x10] @ EMIFS_CS0_CONFIG ldr r1, VAL_EMIFS_CS1_CONFIG str r1, [r0, #0x14] @ EMIFS_CS1_CONFIG ldr r1, VAL_EMIFS_CS2_CONFIG str r1, [r0, #0x18] @ EMIFS_CS2_CONFIG ldr r1, VAL_EMIFS_CS3_CONFIG str r1, [r0, #0x1c] @ EMIFS_CS3_CONFIG ldr r1, VAL_EMIFS_DYN_WAIT str r1, [r0, #0x40] @ EMIFS_CFG_DYN_WAIT /* Setup SDRAM */ ldr r1, VAL_EMIFF_SDRAM_CONFIG str r1, [r0, #0x20] @ EMIFF_SDRAM_CONFIG ldr r1, VAL_EMIFF_SDRAM_CONFIG2 str r1, [r0, #0x3c] @ EMIFF_SDRAM_CONFIG2 ldr r1, VAL_EMIFF_MRS str r1, [r0, #0x24] @ EMIFF_MRS /* SDRAM needs 100us to stabilize */ mov r0, #0x4000 sdelay: subs r0, r0, #0x1 bne sdelay /* back to arch calling code */ mov pc, lr .end