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