diff options
Diffstat (limited to 'arch/arm/mach-omap2/sram-fn.S')
| -rw-r--r-- | arch/arm/mach-omap2/sram-fn.S | 324 |
1 files changed, 0 insertions, 324 deletions
diff --git a/arch/arm/mach-omap2/sram-fn.S b/arch/arm/mach-omap2/sram-fn.S deleted file mode 100644 index 4a9e4914071..00000000000 --- a/arch/arm/mach-omap2/sram-fn.S +++ /dev/null @@ -1,324 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/sram-fn.S - * - * Omap2 specific functions that need to be run in internal SRAM - * - * (C) Copyright 2004 - * Texas Instruments, <www.ti.com> - * Richard Woodruff <r-woodruff2@ti.com> - * - * 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 <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/arch/io.h> -#include <asm/hardware.h> - -#include "sdrc.h" -#include "prm.h" -#include "cm.h" - -#define TIMER_32KSYNCT_CR_V IO_ADDRESS(OMAP2420_32KSYNCT_BASE + 0x010) - - .text - -ENTRY(sram_ddr_init) - stmfd sp!, {r0 - r12, lr} @ save registers on stack - - mov r12, r2 @ capture CS1 vs CS0 - mov r8, r3 @ capture force parameter - - /* frequency shift down */ - ldr r2, cm_clksel2_pll @ get address of dpllout reg - mov r3, #0x1 @ value for 1x operation - str r3, [r2] @ go to L1-freq operation - - /* voltage shift down */ - mov r9, #0x1 @ set up for L1 voltage call - bl voltage_shift @ go drop voltage - - /* dll lock mode */ - ldr r11, sdrc_dlla_ctrl @ addr of dlla ctrl - ldr r10, [r11] @ get current val - cmp r12, #0x1 @ cs1 base (2422 es2.05/1) - addeq r11, r11, #0x8 @ if cs1 base, move to DLLB - mvn r9, #0x4 @ mask to get clear bit2 - and r10, r10, r9 @ clear bit2 for lock mode. - orr r10, r10, #0x8 @ make sure DLL on (es2 bit pos) - orr r10, r10, #0x2 @ 90 degree phase for all below 133Mhz - str r10, [r11] @ commit to DLLA_CTRL - bl i_dll_wait @ wait for dll to lock - - /* get dll value */ - add r11, r11, #0x4 @ get addr of status reg - ldr r10, [r11] @ get locked value - - /* voltage shift up */ - mov r9, #0x0 @ shift back to L0-voltage - bl voltage_shift @ go raise voltage - - /* frequency shift up */ - mov r3, #0x2 @ value for 2x operation - str r3, [r2] @ go to L0-freq operation - - /* reset entry mode for dllctrl */ - sub r11, r11, #0x4 @ move from status to ctrl - cmp r12, #0x1 @ normalize if cs1 based - subeq r11, r11, #0x8 @ possibly back to DLLA - cmp r8, #0x1 @ if forced unlock exit - orreq r1, r1, #0x4 @ make sure exit with unlocked value - str r1, [r11] @ restore DLLA_CTRL high value - add r11, r11, #0x8 @ move to DLLB_CTRL addr - str r1, [r11] @ set value DLLB_CTRL - bl i_dll_wait @ wait for possible lock - - /* set up for return, DDR should be good */ - str r10, [r0] @ write dll_status and return counter - ldmfd sp!, {r0 - r12, pc} @ restore regs and return - - /* ensure the DLL has relocked */ -i_dll_wait: - mov r4, #0x800 @ delay DLL relock, min 0x400 L3 clocks -i_dll_delay: - subs r4, r4, #0x1 - bne i_dll_delay - mov pc, lr - - /* - * shift up or down voltage, use R9 as input to tell level. - * wait for it to finish, use 32k sync counter, 1tick=31uS. - */ -voltage_shift: - ldr r4, prcm_voltctrl @ get addr of volt ctrl. - ldr r5, [r4] @ get value. - ldr r6, prcm_mask_val @ get value of mask - and r5, r5, r6 @ apply mask to clear bits - orr r5, r5, r9 @ bulld value for L0/L1-volt operation. - str r5, [r4] @ set up for change. - mov r3, #0x4000 @ get val for force - orr r5, r5, r3 @ build value for force - str r5, [r4] @ Force transition to L1 - - ldr r3, timer_32ksynct_cr @ get addr of counter - ldr r5, [r3] @ get value - add r5, r5, #0x3 @ give it at most 93uS -volt_delay: - ldr r7, [r3] @ get timer value - cmp r5, r7 @ time up? - bhi volt_delay @ not yet->branch - mov pc, lr @ back to caller. - -/* relative load constants */ -cm_clksel2_pll: - .word OMAP2420_CM_REGADDR(PLL_MOD, CM_CLKSEL2) -sdrc_dlla_ctrl: - .word OMAP242X_SDRC_REGADDR(SDRC_DLLA_CTRL) -prcm_voltctrl: - .word OMAP2420_PRM_REGADDR(OCP_MOD, 0x50) -prcm_mask_val: - .word 0xFFFF3FFC -timer_32ksynct_cr: - .word TIMER_32KSYNCT_CR_V -ENTRY(sram_ddr_init_sz) - .word . - sram_ddr_init - -/* - * Reprograms memory timings. - * r0 = [PRCM_FULL | PRCM_HALF] r1 = SDRC_DLLA_CTRL value r2 = [DDR | SDR] - * PRCM_FULL = 2, PRCM_HALF = 1, DDR = 1, SDR = 0 - */ -ENTRY(sram_reprogram_sdrc) - stmfd sp!, {r0 - r10, lr} @ save registers on stack - mov r3, #0x0 @ clear for mrc call - mcr p15, 0, r3, c7, c10, 4 @ memory barrier, finish ARM SDR/DDR - nop - nop - ldr r6, ddr_sdrc_rfr_ctrl @ get addr of refresh reg - ldr r5, [r6] @ get value - mov r5, r5, lsr #8 @ isolate rfr field and drop burst - - cmp r0, #0x1 @ going to half speed? - movne r9, #0x0 @ if up set flag up for pre up, hi volt - - blne voltage_shift_c @ adjust voltage - - cmp r0, #0x1 @ going to half speed (post branch link) - moveq r5, r5, lsr #1 @ divide by 2 if to half - movne r5, r5, lsl #1 @ mult by 2 if to full - mov r5, r5, lsl #8 @ put rfr field back into place - add r5, r5, #0x1 @ turn on burst of 1 - ldr r4, ddr_cm_clksel2_pll @ get address of out reg - ldr r3, [r4] @ get curr value - orr r3, r3, #0x3 - bic r3, r3, #0x3 @ clear lower bits - orr r3, r3, r0 @ new state value - str r3, [r4] @ set new state (pll/x, x=1 or 2) - nop - nop - - moveq r9, #0x1 @ if speed down, post down, drop volt - bleq voltage_shift_c - - mcr p15, 0, r3, c7, c10, 4 @ memory barrier - str r5, [r6] @ set new RFR_1 value - add r6, r6, #0x30 @ get RFR_2 addr - str r5, [r6] @ set RFR_2 - nop - cmp r2, #0x1 @ (SDR or DDR) do we need to adjust DLL - bne freq_out @ leave if SDR, no DLL function - - /* With DDR, we need to take care of the DLL for the frequency change */ - ldr r2, ddr_sdrc_dlla_ctrl @ addr of dlla ctrl - str r1, [r2] @ write out new SDRC_DLLA_CTRL - add r2, r2, #0x8 @ addr to SDRC_DLLB_CTRL - str r1, [r2] @ commit to SDRC_DLLB_CTRL - mov r1, #0x2000 @ wait DLL relock, min 0x400 L3 clocks -dll_wait: - subs r1, r1, #0x1 - bne dll_wait -freq_out: - ldmfd sp!, {r0 - r10, pc} @ restore regs and return - - /* - * shift up or down voltage, use R9 as input to tell level. - * wait for it to finish, use 32k sync counter, 1tick=31uS. - */ -voltage_shift_c: - ldr r10, ddr_prcm_voltctrl @ get addr of volt ctrl - ldr r8, [r10] @ get value - ldr r7, ddr_prcm_mask_val @ get value of mask - and r8, r8, r7 @ apply mask to clear bits - orr r8, r8, r9 @ bulld value for L0/L1-volt operation. - str r8, [r10] @ set up for change. - mov r7, #0x4000 @ get val for force - orr r8, r8, r7 @ build value for force - str r8, [r10] @ Force transition to L1 - - ldr r10, ddr_timer_32ksynct @ get addr of counter - ldr r8, [r10] @ get value - add r8, r8, #0x2 @ give it at most 62uS (min 31+) -volt_delay_c: - ldr r7, [r10] @ get timer value - cmp r8, r7 @ time up? - bhi volt_delay_c @ not yet->branch - mov pc, lr @ back to caller - -ddr_cm_clksel2_pll: - .word OMAP2420_CM_REGADDR(PLL_MOD, CM_CLKSEL2) -ddr_sdrc_dlla_ctrl: - .word OMAP242X_SDRC_REGADDR(SDRC_DLLA_CTRL) -ddr_sdrc_rfr_ctrl: - .word OMAP242X_SDRC_REGADDR(SDRC_RFR_CTRL_0) -ddr_prcm_voltctrl: - .word OMAP2420_PRM_REGADDR(OCP_MOD, 0x50) -ddr_prcm_mask_val: - .word 0xFFFF3FFC -ddr_timer_32ksynct: - .word TIMER_32KSYNCT_CR_V - -ENTRY(sram_reprogram_sdrc_sz) - .word . - sram_reprogram_sdrc - -/* - * Set dividers and pll. Also recalculate DLL value for DDR and unlock mode. - */ -ENTRY(sram_set_prcm) - stmfd sp!, {r0-r12, lr} @ regs to stack - adr r4, pbegin @ addr of preload start - adr r8, pend @ addr of preload end - mcrr p15, 1, r8, r4, c12 @ preload into icache -pbegin: - /* move into fast relock bypass */ - ldr r8, pll_ctl @ get addr - ldr r5, [r8] @ get val - mvn r6, #0x3 @ clear mask - and r5, r5, r6 @ clear field - orr r7, r5, #0x2 @ fast relock val - str r7, [r8] @ go to fast relock - ldr r4, pll_stat @ addr of stat -block: - /* wait for bypass */ - ldr r8, [r4] @ stat value - and r8, r8, #0x3 @ mask for stat - cmp r8, #0x1 @ there yet - bne block @ loop if not - - /* set new dpll dividers _after_ in bypass */ - ldr r4, pll_div @ get addr - str r0, [r4] @ set dpll ctrl val - - ldr r4, set_config @ get addr - mov r8, #1 @ valid cfg msk - str r8, [r4] @ make dividers take - - mov r4, #100 @ dead spin a bit -wait_a_bit: - subs r4, r4, #1 @ dec loop - bne wait_a_bit @ delay done? - - /* check if staying in bypass */ - cmp r2, #0x1 @ stay in bypass? - beq pend @ jump over dpll relock - - /* relock DPLL with new vals */ - ldr r5, pll_stat @ get addr - ldr r4, pll_ctl @ get addr - orr r8, r7, #0x3 @ val for lock dpll - str r8, [r4] @ set val - mov r0, #1000 @ dead spin a bit -wait_more: - subs r0, r0, #1 @ dec loop - bne wait_more @ delay done? -wait_lock: - ldr r8, [r5] @ get lock val - and r8, r8, #3 @ isolate field - cmp r8, #2 @ locked? - bne wait_lock @ wait if not -pend: - /* update memory timings & briefly lock dll */ - ldr r4, sdrc_rfr @ get addr - str r1, [r4] @ update refresh timing - ldr r11, dlla_ctrl @ get addr of DLLA ctrl - ldr r10, [r11] @ get current val - mvn r9, #0x4 @ mask to get clear bit2 - and r10, r10, r9 @ clear bit2 for lock mode - orr r10, r10, #0x8 @ make sure DLL on (es2 bit pos) - str r10, [r11] @ commit to DLLA_CTRL - add r11, r11, #0x8 @ move to dllb - str r10, [r11] @ hit DLLB also - - mov r4, #0x800 @ relock time (min 0x400 L3 clocks) -wait_dll_lock: - subs r4, r4, #0x1 - bne wait_dll_lock - nop - ldmfd sp!, {r0-r12, pc} @ restore regs and return - -set_config: - .word OMAP2420_PRM_REGADDR(OCP_MOD, 0x80) -pll_ctl: - .word OMAP2420_CM_REGADDR(PLL_MOD, CM_FCLKEN1) -pll_stat: - .word OMAP2420_CM_REGADDR(PLL_MOD, CM_IDLEST1) -pll_div: - .word OMAP2420_CM_REGADDR(PLL_MOD, CM_CLKSEL) -sdrc_rfr: - .word OMAP242X_SDRC_REGADDR(SDRC_RFR_CTRL_0) -dlla_ctrl: - .word OMAP242X_SDRC_REGADDR(SDRC_DLLA_CTRL) - -ENTRY(sram_set_prcm_sz) - .word . - sram_set_prcm |