429 lines
9.1 KiB
ArmAsm
429 lines
9.1 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
|
|
*
|
|
* (C) Copyright 2009 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
#include <generated/asm-offsets.h>
|
|
#include <linux/linkage.h>
|
|
|
|
.section ".text.init", "x"
|
|
|
|
.macro init_arm_erratum
|
|
/* ARM erratum ID #468414 */
|
|
mrc 15, 0, r1, c1, c0, 1
|
|
orr r1, r1, #(1 << 5) /* enable L1NEON bit */
|
|
mcr 15, 0, r1, c1, c0, 1
|
|
.endm
|
|
|
|
/*
|
|
* L2CC Cache setup/invalidation/disable
|
|
*/
|
|
.macro init_l2cc
|
|
/* explicitly disable L2 cache */
|
|
mrc 15, 0, r0, c1, c0, 1
|
|
bic r0, r0, #0x2
|
|
mcr 15, 0, r0, c1, c0, 1
|
|
|
|
/* reconfigure L2 cache aux control reg */
|
|
ldr r0, =0xC0 | /* tag RAM */ \
|
|
0x4 | /* data RAM */ \
|
|
1 << 24 | /* disable write allocate delay */ \
|
|
1 << 23 | /* disable write allocate combine */ \
|
|
1 << 22 /* disable write allocate */
|
|
|
|
#if defined(CONFIG_MX51)
|
|
ldr r3, [r4, #ROM_SI_REV]
|
|
cmp r3, #0x10
|
|
|
|
/* disable write combine for TO 2 and lower revs */
|
|
orrls r0, r0, #1 << 25
|
|
#endif
|
|
|
|
mcr 15, 1, r0, c9, c0, 2
|
|
|
|
/* enable L2 cache */
|
|
mrc 15, 0, r0, c1, c0, 1
|
|
orr r0, r0, #2
|
|
mcr 15, 0, r0, c1, c0, 1
|
|
|
|
.endm /* init_l2cc */
|
|
|
|
/* AIPS setup - Only setup MPROTx registers.
|
|
* The PACR default values are good.*/
|
|
.macro init_aips
|
|
/*
|
|
* Set all MPROTx to be non-bufferable, trusted for R/W,
|
|
* not forced to user-mode.
|
|
*/
|
|
ldr r0, =AIPS1_BASE_ADDR
|
|
ldr r1, =0x77777777
|
|
str r1, [r0, #0x0]
|
|
str r1, [r0, #0x4]
|
|
ldr r0, =AIPS2_BASE_ADDR
|
|
str r1, [r0, #0x0]
|
|
str r1, [r0, #0x4]
|
|
/*
|
|
* Clear the on and off peripheral modules Supervisor Protect bit
|
|
* for SDMA to access them. Did not change the AIPS control registers
|
|
* (offset 0x20) access type
|
|
*/
|
|
.endm /* init_aips */
|
|
|
|
/* M4IF setup */
|
|
.macro init_m4if
|
|
#ifdef CONFIG_MX51
|
|
/* VPU and IPU given higher priority (0x4)
|
|
* IPU accesses with ID=0x1 given highest priority (=0xA)
|
|
*/
|
|
ldr r0, =M4IF_BASE_ADDR
|
|
|
|
ldr r1, =0x00000203
|
|
str r1, [r0, #0x40]
|
|
|
|
str r4, [r0, #0x44]
|
|
|
|
ldr r1, =0x00120125
|
|
str r1, [r0, #0x9C]
|
|
|
|
ldr r1, =0x001901A3
|
|
str r1, [r0, #0x48]
|
|
|
|
#endif
|
|
.endm /* init_m4if */
|
|
|
|
.macro setup_pll pll, freq
|
|
ldr r0, =\pll
|
|
adr r2, W_DP_\freq
|
|
bl setup_pll_func
|
|
.endm
|
|
|
|
#define W_DP_OP 0
|
|
#define W_DP_MFD 4
|
|
#define W_DP_MFN 8
|
|
|
|
setup_pll_func:
|
|
ldr r1, =0x00001232
|
|
str r1, [r0, #PLL_DP_CTL] /* Set DPLL ON (set UPEN bit): BRMO=1 */
|
|
mov r1, #0x2
|
|
str r1, [r0, #PLL_DP_CONFIG] /* Enable auto-restart AREN bit */
|
|
|
|
ldr r1, [r2, #W_DP_OP]
|
|
str r1, [r0, #PLL_DP_OP]
|
|
str r1, [r0, #PLL_DP_HFS_OP]
|
|
|
|
ldr r1, [r2, #W_DP_MFD]
|
|
str r1, [r0, #PLL_DP_MFD]
|
|
str r1, [r0, #PLL_DP_HFS_MFD]
|
|
|
|
ldr r1, [r2, #W_DP_MFN]
|
|
str r1, [r0, #PLL_DP_MFN]
|
|
str r1, [r0, #PLL_DP_HFS_MFN]
|
|
|
|
ldr r1, =0x00001232
|
|
str r1, [r0, #PLL_DP_CTL]
|
|
1: ldr r1, [r0, #PLL_DP_CTL]
|
|
ands r1, r1, #0x1
|
|
beq 1b
|
|
|
|
/* r10 saved upper lr */
|
|
mov pc, lr
|
|
|
|
.macro setup_pll_errata pll, freq
|
|
ldr r2, =\pll
|
|
str r4, [r2, #PLL_DP_CONFIG] /* Disable auto-restart AREN bit */
|
|
ldr r1, =0x00001236
|
|
str r1, [r2, #PLL_DP_CTL] /* Restart PLL with PLM=1 */
|
|
1: ldr r1, [r2, #PLL_DP_CTL] /* Wait for lock */
|
|
ands r1, r1, #0x1
|
|
beq 1b
|
|
|
|
ldr r5, \freq
|
|
str r5, [r2, #PLL_DP_MFN] /* Modify MFN value */
|
|
str r5, [r2, #PLL_DP_HFS_MFN]
|
|
|
|
mov r1, #0x1
|
|
str r1, [r2, #PLL_DP_CONFIG] /* Reload MFN value */
|
|
|
|
2: ldr r1, [r2, #PLL_DP_CONFIG]
|
|
tst r1, #1
|
|
bne 2b
|
|
|
|
ldr r1, =100 /* Wait at least 4 us */
|
|
3: subs r1, r1, #1
|
|
bge 3b
|
|
|
|
mov r1, #0x2
|
|
str r1, [r2, #PLL_DP_CONFIG] /* Enable auto-restart AREN bit */
|
|
.endm
|
|
|
|
.macro init_clock
|
|
#if defined (CONFIG_MX51)
|
|
ldr r0, =CCM_BASE_ADDR
|
|
|
|
/* Gate of clocks to the peripherals first */
|
|
ldr r1, =0x3FFFFFFF
|
|
str r1, [r0, #CLKCTL_CCGR0]
|
|
str r4, [r0, #CLKCTL_CCGR1]
|
|
str r4, [r0, #CLKCTL_CCGR2]
|
|
str r4, [r0, #CLKCTL_CCGR3]
|
|
|
|
ldr r1, =0x00030000
|
|
str r1, [r0, #CLKCTL_CCGR4]
|
|
ldr r1, =0x00FFF030
|
|
str r1, [r0, #CLKCTL_CCGR5]
|
|
ldr r1, =0x00000300
|
|
str r1, [r0, #CLKCTL_CCGR6]
|
|
|
|
/* Disable IPU and HSC dividers */
|
|
mov r1, #0x60000
|
|
str r1, [r0, #CLKCTL_CCDR]
|
|
|
|
/* Make sure to switch the DDR away from PLL 1 */
|
|
ldr r1, =0x19239145
|
|
str r1, [r0, #CLKCTL_CBCDR]
|
|
/* make sure divider effective */
|
|
1: ldr r1, [r0, #CLKCTL_CDHIPR]
|
|
cmp r1, #0x0
|
|
bne 1b
|
|
|
|
/* Switch ARM to step clock */
|
|
mov r1, #0x4
|
|
str r1, [r0, #CLKCTL_CCSR]
|
|
|
|
#if defined(CONFIG_MX51_PLL_ERRATA)
|
|
setup_pll PLL1_BASE_ADDR, 864
|
|
setup_pll_errata PLL1_BASE_ADDR, W_DP_MFN_800_DIT
|
|
#else
|
|
setup_pll PLL1_BASE_ADDR, 800
|
|
#endif
|
|
|
|
setup_pll PLL3_BASE_ADDR, 665
|
|
|
|
/* Switch peripheral to PLL 3 */
|
|
ldr r0, =CCM_BASE_ADDR
|
|
ldr r1, =0x000010C0 | CONFIG_SYS_DDR_CLKSEL
|
|
str r1, [r0, #CLKCTL_CBCMR]
|
|
ldr r1, =0x13239145
|
|
str r1, [r0, #CLKCTL_CBCDR]
|
|
setup_pll PLL2_BASE_ADDR, 665
|
|
|
|
/* Switch peripheral to PLL2 */
|
|
ldr r0, =CCM_BASE_ADDR
|
|
ldr r1, =0x19239145
|
|
str r1, [r0, #CLKCTL_CBCDR]
|
|
ldr r1, =0x000020C0 | CONFIG_SYS_DDR_CLKSEL
|
|
str r1, [r0, #CLKCTL_CBCMR]
|
|
|
|
setup_pll PLL3_BASE_ADDR, 216
|
|
|
|
/* Set the platform clock dividers */
|
|
ldr r0, =ARM_BASE_ADDR
|
|
ldr r1, =0x00000725
|
|
str r1, [r0, #0x14]
|
|
|
|
ldr r0, =CCM_BASE_ADDR
|
|
|
|
/* Run 3.0 at Full speed, for other TO's wait till we increase VDDGP */
|
|
ldr r3, [r4, #ROM_SI_REV]
|
|
cmp r3, #0x10
|
|
movls r1, #0x1
|
|
movhi r1, #0
|
|
|
|
str r1, [r0, #CLKCTL_CACRR]
|
|
|
|
/* Switch ARM back to PLL 1 */
|
|
str r4, [r0, #CLKCTL_CCSR]
|
|
|
|
/* setup the rest */
|
|
/* Use lp_apm (24MHz) source for perclk */
|
|
ldr r1, =0x000020C2 | CONFIG_SYS_DDR_CLKSEL
|
|
str r1, [r0, #CLKCTL_CBCMR]
|
|
/* ddr clock from PLL 1, all perclk dividers are 1 since using 24MHz */
|
|
ldr r1, =CONFIG_SYS_CLKTL_CBCDR
|
|
str r1, [r0, #CLKCTL_CBCDR]
|
|
|
|
/* Restore the default values in the Gate registers */
|
|
ldr r1, =0xFFFFFFFF
|
|
str r1, [r0, #CLKCTL_CCGR0]
|
|
str r1, [r0, #CLKCTL_CCGR1]
|
|
str r1, [r0, #CLKCTL_CCGR2]
|
|
str r1, [r0, #CLKCTL_CCGR3]
|
|
str r1, [r0, #CLKCTL_CCGR4]
|
|
str r1, [r0, #CLKCTL_CCGR5]
|
|
str r1, [r0, #CLKCTL_CCGR6]
|
|
|
|
/* Use PLL 2 for UART's, get 66.5MHz from it */
|
|
ldr r1, =0xA5A2A020
|
|
str r1, [r0, #CLKCTL_CSCMR1]
|
|
ldr r1, =0x00C30321
|
|
str r1, [r0, #CLKCTL_CSCDR1]
|
|
/* make sure divider effective */
|
|
1: ldr r1, [r0, #CLKCTL_CDHIPR]
|
|
cmp r1, #0x0
|
|
bne 1b
|
|
|
|
str r4, [r0, #CLKCTL_CCDR]
|
|
|
|
/* for cko - for ARM div by 8 */
|
|
mov r1, #0x000A0000
|
|
add r1, r1, #0x00000F0
|
|
str r1, [r0, #CLKCTL_CCOSR]
|
|
#else /* CONFIG_MX53 */
|
|
ldr r0, =CCM_BASE_ADDR
|
|
|
|
/* Gate of clocks to the peripherals first */
|
|
ldr r1, =0x3FFFFFFF
|
|
str r1, [r0, #CLKCTL_CCGR0]
|
|
str r4, [r0, #CLKCTL_CCGR1]
|
|
str r4, [r0, #CLKCTL_CCGR2]
|
|
str r4, [r0, #CLKCTL_CCGR3]
|
|
str r4, [r0, #CLKCTL_CCGR7]
|
|
ldr r1, =0x00030000
|
|
str r1, [r0, #CLKCTL_CCGR4]
|
|
ldr r1, =0x00FFF030
|
|
str r1, [r0, #CLKCTL_CCGR5]
|
|
ldr r1, =0x0F00030F
|
|
str r1, [r0, #CLKCTL_CCGR6]
|
|
|
|
/* Switch ARM to step clock */
|
|
mov r1, #0x4
|
|
str r1, [r0, #CLKCTL_CCSR]
|
|
|
|
setup_pll PLL1_BASE_ADDR, 800
|
|
|
|
setup_pll PLL3_BASE_ADDR, 400
|
|
|
|
/* Switch peripheral to PLL3 */
|
|
ldr r0, =CCM_BASE_ADDR
|
|
ldr r1, =0x00015154
|
|
str r1, [r0, #CLKCTL_CBCMR]
|
|
ldr r1, =0x02898945
|
|
str r1, [r0, #CLKCTL_CBCDR]
|
|
/* make sure change is effective */
|
|
1: ldr r1, [r0, #CLKCTL_CDHIPR]
|
|
cmp r1, #0x0
|
|
bne 1b
|
|
|
|
setup_pll PLL2_BASE_ADDR, 400
|
|
|
|
/* Switch peripheral to PLL2 */
|
|
ldr r0, =CCM_BASE_ADDR
|
|
ldr r1, =0x00888945
|
|
str r1, [r0, #CLKCTL_CBCDR]
|
|
|
|
ldr r1, =0x00016154
|
|
str r1, [r0, #CLKCTL_CBCMR]
|
|
|
|
/*change uart clk parent to pll2*/
|
|
ldr r1, [r0, #CLKCTL_CSCMR1]
|
|
and r1, r1, #0xfcffffff
|
|
orr r1, r1, #0x01000000
|
|
str r1, [r0, #CLKCTL_CSCMR1]
|
|
|
|
/* make sure change is effective */
|
|
1: ldr r1, [r0, #CLKCTL_CDHIPR]
|
|
cmp r1, #0x0
|
|
bne 1b
|
|
|
|
setup_pll PLL3_BASE_ADDR, 216
|
|
|
|
setup_pll PLL4_BASE_ADDR, 455
|
|
|
|
/* Set the platform clock dividers */
|
|
ldr r0, =ARM_BASE_ADDR
|
|
ldr r1, =0x00000124
|
|
str r1, [r0, #0x14]
|
|
|
|
ldr r0, =CCM_BASE_ADDR
|
|
mov r1, #0
|
|
str r1, [r0, #CLKCTL_CACRR]
|
|
|
|
/* Switch ARM back to PLL 1. */
|
|
mov r1, #0x0
|
|
str r1, [r0, #CLKCTL_CCSR]
|
|
|
|
/* make uart div=6 */
|
|
ldr r1, [r0, #CLKCTL_CSCDR1]
|
|
and r1, r1, #0xffffffc0
|
|
orr r1, r1, #0x0a
|
|
str r1, [r0, #CLKCTL_CSCDR1]
|
|
|
|
/* Restore the default values in the Gate registers */
|
|
ldr r1, =0xFFFFFFFF
|
|
str r1, [r0, #CLKCTL_CCGR0]
|
|
str r1, [r0, #CLKCTL_CCGR1]
|
|
str r1, [r0, #CLKCTL_CCGR2]
|
|
str r1, [r0, #CLKCTL_CCGR3]
|
|
str r1, [r0, #CLKCTL_CCGR4]
|
|
str r1, [r0, #CLKCTL_CCGR5]
|
|
str r1, [r0, #CLKCTL_CCGR6]
|
|
str r1, [r0, #CLKCTL_CCGR7]
|
|
|
|
mov r1, #0x00000
|
|
str r1, [r0, #CLKCTL_CCDR]
|
|
|
|
/* for cko - for ARM div by 8 */
|
|
mov r1, #0x000A0000
|
|
add r1, r1, #0x00000F0
|
|
str r1, [r0, #CLKCTL_CCOSR]
|
|
|
|
#endif /* CONFIG_MX53 */
|
|
.endm
|
|
|
|
ENTRY(lowlevel_init)
|
|
mov r10, lr
|
|
mov r4, #0 /* Fix R4 to 0 */
|
|
|
|
#if defined(CONFIG_SYS_MAIN_PWR_ON)
|
|
ldr r0, =GPIO1_BASE_ADDR
|
|
ldr r1, [r0, #0x0]
|
|
orr r1, r1, #1 << 23
|
|
str r1, [r0, #0x0]
|
|
ldr r1, [r0, #0x4]
|
|
orr r1, r1, #1 << 23
|
|
str r1, [r0, #0x4]
|
|
#endif
|
|
|
|
init_arm_erratum
|
|
|
|
init_l2cc
|
|
|
|
init_aips
|
|
|
|
init_m4if
|
|
|
|
init_clock
|
|
|
|
mov pc, r10
|
|
ENDPROC(lowlevel_init)
|
|
|
|
/* Board level setting value */
|
|
#if defined(CONFIG_MX51_PLL_ERRATA)
|
|
W_DP_864: .word DP_OP_864
|
|
.word DP_MFD_864
|
|
.word DP_MFN_864
|
|
W_DP_MFN_800_DIT: .word DP_MFN_800_DIT
|
|
#else
|
|
W_DP_800: .word DP_OP_800
|
|
.word DP_MFD_800
|
|
.word DP_MFN_800
|
|
#endif
|
|
#if defined(CONFIG_MX51)
|
|
W_DP_665: .word DP_OP_665
|
|
.word DP_MFD_665
|
|
.word DP_MFN_665
|
|
#endif
|
|
W_DP_216: .word DP_OP_216
|
|
.word DP_MFD_216
|
|
.word DP_MFN_216
|
|
W_DP_400: .word DP_OP_400
|
|
.word DP_MFD_400
|
|
.word DP_MFN_400
|
|
W_DP_455: .word DP_OP_455
|
|
.word DP_MFD_455
|
|
.word DP_MFN_455
|