diff options
Diffstat (limited to 'board/omap5912osk/lowlevel_init.S')
| -rw-r--r-- | board/omap5912osk/lowlevel_init.S | 183 |
1 files changed, 109 insertions, 74 deletions
diff --git a/board/omap5912osk/lowlevel_init.S b/board/omap5912osk/lowlevel_init.S index 3b9633a..d2d429e 100644 --- a/board/omap5912osk/lowlevel_init.S +++ b/board/omap5912osk/lowlevel_init.S @@ -41,6 +41,13 @@ _TEXT_BASE: .globl lowlevel_init lowlevel_init: + /*------------------------------------------------------* + * Ensure i-cache is enabled * + * To configure TC regs without fetching instruction * + *------------------------------------------------------*/ + mrc p15, 0, r0, c1, c0 + orr r0, r0, #0x1000 + mcr p15, 0, r0, c1, c0 /*------------------------------------------------------* *mask all IRQs by setting all bits in the INTMR default* @@ -59,33 +66,34 @@ lowlevel_init: str r1, [r0] /*------------------------------------------------------* - * Set up ARM CLM registers (IDLECT2) * + * Set up ARM CLM registers (IDLECT2) * *------------------------------------------------------*/ ldr r0, REG_ARM_IDLECT2 ldr r1, VAL_ARM_IDLECT2 str r1, [r0] /*------------------------------------------------------* - * Set up ARM CLM registers (IDLECT3) * + * Set up ARM CLM registers (IDLECT3) * *------------------------------------------------------*/ ldr r0, REG_ARM_IDLECT3 ldr r1, VAL_ARM_IDLECT3 str r1, [r0] - - mov r1, #0x01 /* PER_EN bit */ + mov r1, #0x01 /* PER_EN bit */ ldr r0, REG_ARM_RSTCT2 - strh r1, [r0] /* CLKM; Peripheral reset. */ + strh r1, [r0] /* CLKM; Peripheral reset. */ - /* Set CLKM to Sync-Scalable */ - /* I supposedly need to enable the dsp clock before switching */ - mov r1, #0x0000 + /* Set CLKM to Sync-Scalable */ + 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 */ + + mov r2, #0 +1: cmp r2, #1 + streqh r1, [r0] + add r2, r2, #1 + cmp r2, #0x100 /* wait for any bubbles to finish */ bne 1b + ldr r1, VAL_ARM_CKCTL ldr r0, REG_ARM_CKCTL strh r1, [r0] @@ -107,17 +115,16 @@ lowlevel_init: 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 */ + 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. */ + ands r1, r1, #0x01 /* Check the LOCK bit.*/ + beq 2b /* loop until bit goes hi. */ lock_end: - /*------------------------------------------------------* - * Turn off the watchdog during init... * + * Turn off the watchdog during init... * *------------------------------------------------------*/ ldr r0, REG_WATCHDOG ldr r1, WATCHDOG_VAL1 @@ -143,30 +150,49 @@ watch2Wait: tst r1, #0x10 bne watch2Wait - /* Set memory timings corresponding to the new clock speed */ + ldr r3, VAL_SDRAM_CONFIG_SDF0 /* Check execution location to determine current execution location * and branch to appropriate initialization code. */ - /* Load physical SDRAM base. */ - mov r0, #0x10000000 - /* Get current execution location. */ - mov r1, pc - /* Compare. */ - cmp r1, r0 - /* Skip over EMIF-fast initialization if running from SDRAM. */ - bge skip_sdram + mov r0, #0x10000000 /* Load physical SDRAM base. */ + mov r1, pc /* Get current execution location. */ + cmp r1, r0 /* Compare. */ + bge skip_sdram /* Skip over EMIF-fast initialization if running from SDRAM. */ + + /* identify the device revision, -- TMX or TMP(TMS) */ + ldr r0, REG_DEVICE_ID + ldr r1, [r0] + + ldr r0, VAL_DEVICE_ID_TMP + mov r1, r1, lsl #15 + mov r1, r1, lsr #16 + cmp r0, r1 + bne skip_TMP_Patch + + /* Enable TMP/TMS device new features */ + mov r0, #1 + ldr r1, REG_TC_EMIFF_DOUBLER + str r0, [r1] + + /* Enable new ac parameters */ + mov r0, #0x0b + ldr r1, REG_SDRAM_CONFIG2 + str r0, [r1] + + ldr r3, VAL_SDRAM_CONFIG_SDF1 + +skip_TMP_Patch: /* * Delay for SDRAM initialization. */ - mov r3, #0x1800 /* value should be checked */ + mov r0, #0x1800 /* value should be checked */ 3: - subs r3, r3, #0x1 /* Decrement count */ + subs r0, r0, #0x1 /* Decrement count */ bne 3b - /* * Set SDRAM control values. Disable refresh before MRS command. */ @@ -178,14 +204,15 @@ watch2Wait: /* config register */ ldr r0, REG_SDRAM_CONFIG - ldr r1, SDRAM_CONFIG_VAL - str r1, [r0] + str r3, [r0] /* manual command register */ ldr r0, REG_SDRAM_MANUAL_CMD + /* issue set cke high */ mov r1, #CMD_SDRAM_CKE_SET_HIGH str r1, [r0] + /* issue nop */ mov r1, #CMD_SDRAM_NOP str r1, [r0] @@ -228,25 +255,23 @@ waitMDDR1: str r1, [r0] /* delay loop */ - mov r2, #0x0100 + mov r0, #0x0100 waitMDDR2: - subs r2, r2, #1 + subs r0, r0, #1 bne waitMDDR2 /* * Delay for SDRAM initialization. */ - mov r3, #0x1800 + mov r0, #0x1800 4: - subs r3, r3, #1 /* Decrement count. */ + subs r0, r0, #1 /* Decrement count. */ bne 4b b common_tc skip_sdram: - ldr r0, REG_SDRAM_CONFIG - ldr r1, SDRAM_CONFIG_VAL - str r1, [r0] + str r3, [r0] common_tc: /* slow interface */ @@ -257,10 +282,15 @@ common_tc: 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_CS3_CONFIG ldr r0, REG_TC_EMIFS_CS3_CONFIG str r1, [r0] /* Chip Select 3 */ + ldr r1, VAL_TC_EMIFS_DWS + ldr r0, REG_TC_EMIFS_DWS + str r1, [r0] /* Enable EMIFS.RDY for CS1 (ether) */ + #ifdef CONFIG_H2_OMAP1610 /* inserting additional 2 clock cycle hold time for LAN */ ldr r0, REG_TC_EMIFS_CS1_ADVANCED @@ -282,8 +312,9 @@ common_tc: /* the literal pools origin */ .ltorg - -REG_TC_EMIFS_CONFIG: /* 32 bits */ +REG_DEVICE_ID: /* 32 bits */ + .word 0xfffe2004 +REG_TC_EMIFS_CONFIG: .word 0xfffecc0c REG_TC_EMIFS_CS0_CONFIG: /* 32 bits */ .word 0xfffecc10 @@ -293,7 +324,8 @@ REG_TC_EMIFS_CS2_CONFIG: /* 32 bits */ .word 0xfffecc18 REG_TC_EMIFS_CS3_CONFIG: /* 32 bits */ .word 0xfffecc1c - +REG_TC_EMIFS_DWS: /* 32 bits */ + .word 0xfffecc40 #ifdef CONFIG_H2_OMAP1610 REG_TC_EMIFS_CS1_ADVANCED: /* 32 bits */ .word 0xfffecc54 @@ -302,18 +334,17 @@ REG_TC_EMIFS_CS1_ADVANCED: /* 32 bits */ /* MPU clock/reset/power mode control registers */ REG_ARM_CKCTL: /* 16 bits */ .word 0xfffece00 - REG_ARM_IDLECT3: /* 16 bits */ .word 0xfffece24 REG_ARM_IDLECT2: /* 16 bits */ .word 0xfffece08 REG_ARM_IDLECT1: /* 16 bits */ .word 0xfffece04 - REG_ARM_RSTCT2: /* 16 bits */ .word 0xfffece14 REG_ARM_SYSST: /* 16 bits */ .word 0xfffece18 + /* DPLL control registers */ REG_DPLL1_CTL: /* 16 bits */ .word 0xfffecf00 @@ -335,6 +366,10 @@ WSPRDOG_VAL2: counter @8192 rows, 10 ns, 8 burst */ REG_SDRAM_CONFIG: .word 0xfffecc20 +REG_SDRAM_CONFIG2: + .word 0xfffecc3c +REG_TC_EMIFF_DOUBLER: /* 32 bits */ + .word 0xfffecc60 /* Operation register */ REG_SDRAM_OPERATION: @@ -356,35 +391,47 @@ REG_SDRAM_EMRS1: REG_DLL_WRT_CONTROL: .word 0xfffecc68 DLL_WRT_CONTROL_VAL: - .word 0x03f00002 + .word 0x03f00002 /* Phase of 72deg, write offset +31 */ /* URD DLL register */ REG_DLL_URD_CONTROL: .word 0xfffeccc0 DLL_URD_CONTROL_VAL: - .word 0x00800002 + .word 0x00800002 /* Phase of 72deg, read offset +31 */ /* LRD DLL register */ REG_DLL_LRD_CONTROL: .word 0xfffecccc +DLL_LRD_CONTROL_VAL: + .word 0x00800002 /* read offset +31 */ REG_WATCHDOG: .word 0xfffec808 +WATCHDOG_VAL1: + .word 0x000000f5 +WATCHDOG_VAL2: + .word 0x000000a0 REG_MPU_LOAD_TIMER: - .word 0xfffec600 + .word 0xfffec504 REG_MPU_CNTL_TIMER: .word 0xfffec500 +VAL_MPU_LOAD_TIMER: + .word 0xffffffff +VAL_MPU_CNTL_TIMER: + .word 0xffffffa1 /* 96 MHz Samsung Mobile DDR */ -SDRAM_CONFIG_VAL: - .word 0x001200f4 +/* Original setting for TMX device */ +VAL_SDRAM_CONFIG_SDF0: + .word 0x0014e6fe -DLL_LRD_CONTROL_VAL: - .word 0x00800002 +/* NEW_SYS_FREQ mode (valid only TMP/TMS devices) */ +VAL_SDRAM_CONFIG_SDF1: + .word 0x0114e6fe VAL_ARM_CKCTL: - .word 0x3000 + .word 0x2000 /* was: 0x3000, now use CLK_REF for timer input */ VAL_DPLL1_CTL: .word 0x2830 @@ -396,7 +443,11 @@ VAL_TC_EMIFS_CS1_CONFIG: VAL_TC_EMIFS_CS2_CONFIG: .word 0x000055f0 VAL_TC_EMIFS_CS3_CONFIG: - .word 0x88011131 + .word 0x88013141 +VAL_TC_EMIFS_DWS: /* Enable EMIFS.RDY for CS1 access (ether) */ + .word 0x000000c0 +VAL_DEVICE_ID_TMP: /* TMP/TMS=0xb65f, TMX=0xb58c */ + .word 0xb65f #endif #ifdef CONFIG_H2_OMAP1610 @@ -407,36 +458,20 @@ VAL_TC_EMIFS_CS1_CONFIG: VAL_TC_EMIFS_CS2_CONFIG: .word 0xf800f22a VAL_TC_EMIFS_CS3_CONFIG: - .word 0x88011131 + .word 0x88013141 VAL_TC_EMIFS_CS1_ADVANCED: .word 0x00000022 #endif -VAL_TC_EMIFF_SDRAM_CONFIG: - .word 0x010290fc -VAL_TC_EMIFF_MRS: - .word 0x00000027 - VAL_ARM_IDLECT1: .word 0x00000400 - VAL_ARM_IDLECT2: .word 0x00000886 VAL_ARM_IDLECT3: .word 0x00000015 -WATCHDOG_VAL1: - .word 0x000000f5 -WATCHDOG_VAL2: - .word 0x000000a0 - -VAL_MPU_LOAD_TIMER: - .word 0xffffffff -VAL_MPU_CNTL_TIMER: - .word 0xffffffa1 - /* command values */ -.equ CMD_SDRAM_NOP, 0x00000000 -.equ CMD_SDRAM_PRECHARGE, 0x00000001 -.equ CMD_SDRAM_AUTOREFRESH, 0x00000002 -.equ CMD_SDRAM_CKE_SET_HIGH, 0x00000007 +.equ CMD_SDRAM_NOP, 0x00000000 +.equ CMD_SDRAM_PRECHARGE, 0x00000001 +.equ CMD_SDRAM_AUTOREFRESH, 0x00000002 +.equ CMD_SDRAM_CKE_SET_HIGH, 0x00000007 |