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/*
* Board specific setup info
*
* (C) Copyright 2004 Ales Jindra <jindra@2n.cz>
* (C) Copyright 2005 Ladislav Michl <michl@2n.cz>
*
* 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
* version 2 published by the Free Software Foundation.
*
* 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>
_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 0x00003031
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 */
VAL_EMIFF_SDRAM_CONFIG: .word ((0 << 0) | (0 << 1) | (3 << 2) | (0xd << 4) | (0x246 << 8) | (0 << 24) | (0 << 26) | (0 << 27))
VAL_EMIFF_SDRAM_CONFIG2: .word 0x00000003
VAL_EMIFF_MRS: .word 0x00000037
/*
* GPIO04 - D4 (Onboard LED)
* GPIO07 - LAN91C111 reset
*/
GPIO_DIRECTION:
.word 0x0000ff6f
/*
* Disable everything, but D4 LED (connected through 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 0x12082480 @ FUNC_MUX_CTRL_5
.word 0x0000001c @ FUNC_MUX_CTRL_6
.word 0x00000003 @ FUNC_MUX_CTRL_7
.word 0x10001200 @ FUNC_MUX_CTRL_8
.word 0x01201012 @ FUNC_MUX_CTRL_9
.word 0x02081248 @ FUNC_MUX_CTRL_A
.word 0x00001248 @ FUNC_MUX_CTRL_B
.word 0x12240000 @ FUNC_MUX_CTRL_C
.word 0x00002000 @ FUNC_MUX_CTRL_D
.word 0x00000000 @ PULL_DWN_CTRL_0
.word 0x0000085f @ PULL_DWN_CTRL_1
.word 0x01001000 @ 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 enables onboard 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
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