* Tony Lindgren <tony@xxxxxxxxxxx> [080328 04:46]: > Hi all, > > Following two patches add sram34xx.S based on Karthik's patch and what's > at [1]. Looks like the sram code in [1] is newer so I've used that. > Let me know if that's not the case. > > Karthik, can you please check and ack? I've only compile tested them. > > Regards, > > Tony > > [1] http://linux.omap.com/pub/kernel/3430zoom/linux-ldp-v1.0b.tar.gz I'll push these two patches today meged into single patch below. Tony
>From 8d00571b0ecb2fb21b35e5d13b2959a71142abfa Mon Sep 17 00:00:00 2001 From: Karthik Dasu <karthik-dp@xxxxxx> Date: Thu, 15 May 2008 14:27:08 -0700 Subject: [PATCH] ARM: OMAP3: Add sram34xx.S This patch adds sram34xx.S for programming the core DPLL. It is based on Karthik's earlier patch and TI's sram-fn_34xxS from: http://linux.omap.com/pub/kernel/3430zoom/linux-ldp-v1.0b.tar.gz Patch modified by Tony for the new register access. Signed-off-by: Karthik Dasu<karthik-dp@xxxxxx> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 552664c..ea0cf43 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -9,6 +9,7 @@ obj-y := irq.o id.o io.o memory.o control.o prcm.o clock.o mux.o \ # Functions loaded to SRAM obj-$(CONFIG_ARCH_OMAP2) += sram24xx.o +obj-$(CONFIG_ARCH_OMAP3) += sram34xx.o # Power Management obj-$(CONFIG_PM) += pm.o sleep.o diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S new file mode 100644 index 0000000..74873df --- /dev/null +++ b/arch/arm/mach-omap2/sram34xx.S @@ -0,0 +1,209 @@ +/* + * linux/arch/arm/mach-omap3/sram.S + * + * Omap3 specific functions that need to be run in internal SRAM + * + * (C) Copyright 2007 + * Texas Instruments Inc. + * Rajendra Nayak <rnayak@xxxxxx> + * + * (C) Copyright 2004 + * Texas Instruments, <www.ti.com> + * Richard Woodruff <r-woodruff2@xxxxxx> + * + * 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/hardware.h> + +#include <asm/arch/io.h> + +#include "sdrc.h" +#include "cm.h" + + .text + +ENTRY(omap34xx_sram_ddr_init) + stmfd sp!, {r0 - r12, lr} @ save registers on stack + ldmfd sp!, {r0 - r12, pc} @ restore regs and return +ENTRY(omap34xx_sram_ddr_init_sz) + .word . - omap34xx_sram_ddr_init + +ENTRY(omap34xx_sram_reprogram_sdrc) + stmfd sp!, {r0 - r10, lr} @ save registers on stack + ldmfd sp!, {r0 - r10, pc} @ restore regs and return +ENTRY(omap34xx_sram_reprogram_sdrc_sz) + .word . - omap34xx_sram_reprogram_sdrc + +/* + * Set dividers and pll. Also recalculate DLL value for DDR and unlock mode. + */ +ENTRY(omap34xx_sram_set_prcm) + stmfd sp!, {r0-r12, lr} @ regs to stack +ENTRY(omap34xx_sram_set_prcm_sz) + .word . - omap34xx_sram_set_prcm + +/* + * Change frequency of core dpll + * r0 = sdrc_rfr_ctrl r1 = sdrc_actim_ctrla r2 = sdrc_actim_ctrlb r3 = M2 + */ +ENTRY(omap34xx_sram_configure_core_dpll) + stmfd sp!, {r1-r12, lr} @ store regs to stack + cmp r3, #0x2 + blne configure_sdrc + cmp r3, #0x2 + blne lock_dll + cmp r3, #0x1 + blne unlock_dll + bl sdram_in_selfrefresh @ put the SDRAM in self refresh + bl configure_core_dpll + bl enable_sdrc + cmp r3, #0x1 + blne wait_dll_unlock + cmp r3, #0x2 + blne wait_dll_lock + cmp r3, #0x1 + blne configure_sdrc + mov r0, #0 @ return value + ldmfd sp!, {r1-r12, pc} @ restore regs and return +unlock_dll: + ldr r4, omap34xx_sdrc_dlla_ctrl + ldr r5, [r4] + orr r5, r5, #0x4 + str r5, [r4] + bx lr +lock_dll: + ldr r4, omap34xx_sdrc_dlla_ctrl + ldr r5, [r4] + bic r5, r5, #0x4 + str r5, [r4] + bx lr +sdram_in_selfrefresh: + mov r5, #0x0 @ Move 0 to R5 + mcr p15, 0, r5, c7, c10, 5 @ memory barrier + ldr r4, omap34xx_sdrc_power @ read the SDRC_POWER register + ldr r5, [r4] @ read the contents of SDRC_POWER + orr r5, r5, #0x40 @ enable self refresh on idle req + str r5, [r4] @ write back to SDRC_POWER register + ldr r4, omap34xx_cm_iclken1_core @ read the CM_ICLKEN1_CORE reg + ldr r5, [r4] + bic r5, r5, #0x2 @ disable iclk bit for SRDC + str r5, [r4] +wait_sdrc_idle: + ldr r4, omap34xx_cm_idlest1_core + ldr r5, [r4] + and r5, r5, #0x2 @ check for SDRC idle + cmp r5, #2 + bne wait_sdrc_idle + bx lr +configure_core_dpll: + ldr r4, omap34xx_cm_clksel1_pll + ldr r5, [r4] + ldr r6, core_m2_mask_val @ modify m2 for core dpll + and r5, r5, r6 + orr r5, r5, r3, lsl #0x1B @ r3 contains the M2 val + str r5, [r4] + mov r5, #0x800 @ wait for the clock to stabilise + cmp r3, #2 + bne wait_clk_stable + bx lr +wait_clk_stable: + subs r5, r5, #1 + bne wait_clk_stable + nop + nop + nop + nop + nop + nop + nop + nop + nop + nop + bx lr +enable_sdrc: + ldr r4, omap34xx_cm_iclken1_core + ldr r5, [r4] + orr r5, r5, #0x2 @ enable iclk bit for SDRC + str r5, [r4] +wait_sdrc_idle1: + ldr r4, omap34xx_cm_idlest1_core + ldr r5, [r4] + and r5, r5, #0x2 + cmp r5, #0 + bne wait_sdrc_idle1 + ldr r4, omap34xx_sdrc_power + ldr r5, [r4] + bic r5, r5, #0x40 + str r5, [r4] + bx lr +wait_dll_lock: + ldr r4, omap34xx_sdrc_dlla_status + ldr r5, [r4] + and r5, r5, #0x4 + cmp r5, #0x4 + bne wait_dll_lock + bx lr +wait_dll_unlock: + ldr r4, omap34xx_sdrc_dlla_status + ldr r5, [r4] + and r5, r5, #0x4 + cmp r5, #0x0 + bne wait_dll_unlock + bx lr +configure_sdrc: + ldr r4, omap34xx_sdrc_rfr_ctrl + str r0, [r4] + ldr r4, omap34xx_sdrc_actim_ctrla + str r1, [r4] + ldr r4, omap34xx_sdrc_actim_ctrlb + str r2, [r4] + bx lr + +omap34xx_sdrc_power: + .word OMAP34XX_SDRC_REGADDR(SDRC_POWER) +omap34xx_cm_clksel1_pll: + .word OMAP34XX_CM_REGADDR(PLL_MOD, CM_CLKSEL1) +omap34xx_cm_idlest1_core: + .word OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST) +omap34xx_cm_iclken1_core: + .word OMAP34XX_CM_REGADDR(CORE_MOD, CM_ICLKEN1) +omap34xx_sdrc_rfr_ctrl: + .word OMAP34XX_SDRC_REGADDR(SDRC_RFR_CTRL_0) +omap34xx_sdrc_actim_ctrla: + .word OMAP34XX_SDRC_REGADDR(SDRC_ACTIM_CTRL_A) +omap34xx_sdrc_actim_ctrlb: + .word OMAP34XX_SDRC_REGADDR(SDRC_ACTIM_CTRL_B) +omap34xx_sdrc_dlla_status: + .word OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS) +omap34xx_sdrc_dlla_ctrl: + .word OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL) +core_m2_mask_val: + .word 0xE7FFFFFF + +ENTRY(omap34xx_sram_configure_core_dpll_sz) + .word . - omap34xx_sram_configure_core_dpll + +/* + * Reprogram GPMC + */ +ENTRY(omap34xx_sram_reprogram_gpmc) + stmfd sp!, {r0-r12, lr} @ regs to stack + ldmfd sp!, {r0-r12, pc} @ restore regs and return + +ENTRY(omap34xx_sram_reprogram_gpmc_sz) + .word . - omap34xx_sram_reprogram_gpmc diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c index 2fc8f61..fb3f0d1 100644 --- a/arch/arm/plat-omap/sram.c +++ b/arch/arm/plat-omap/sram.c @@ -461,6 +461,67 @@ static inline int omap24xx_sram_init(void) } #endif +#ifdef CONFIG_ARCH_OMAP3 + +static u32 (*_omap2_sram_reprogram_gpmc)(u32 perf_level); +u32 omap2_sram_reprogram_gpmc(u32 perf_level) +{ + if (!_omap2_sram_reprogram_gpmc) + omap_sram_error(); + + return _omap2_sram_reprogram_gpmc(perf_level); +} + +static u32 (*_omap2_sram_configure_core_dpll)(u32 m, u32 n, + u32 freqsel, u32 m2); +u32 omap2_sram_configure_core_dpll(u32 m, u32 n, u32 freqsel, u32 m2) +{ + if (!_omap2_sram_configure_core_dpll) + omap_sram_error(); + + return _omap2_sram_configure_core_dpll(m, n, freqsel, m2); +} + +/* REVISIT: Should this be same as omap34xx_sram_init() after off-idle? */ +void restore_sram_functions(void) +{ + omap_sram_ceil = omap_sram_base + omap_sram_size; + + _omap2_sram_reprogram_gpmc = omap_sram_push(omap34xx_sram_reprogram_gpmc, + omap34xx_sram_reprogram_gpmc_sz); + + _omap2_sram_configure_core_dpll = + omap_sram_push(omap34xx_sram_configure_core_dpll, + omap34xx_sram_configure_core_dpll_sz); +} + +int __init omap34xx_sram_init(void) +{ + _omap2_sram_ddr_init = omap_sram_push(omap34xx_sram_ddr_init, + omap34xx_sram_ddr_init_sz); + + _omap2_sram_reprogram_sdrc = omap_sram_push(omap34xx_sram_reprogram_sdrc, + omap34xx_sram_reprogram_sdrc_sz); + + _omap2_set_prcm = omap_sram_push(omap34xx_sram_set_prcm, + omap34xx_sram_set_prcm_sz); + + _omap2_sram_reprogram_gpmc = omap_sram_push(omap34xx_sram_reprogram_gpmc, + omap34xx_sram_reprogram_gpmc_sz); + + _omap2_sram_configure_core_dpll = + omap_sram_push(omap34xx_sram_configure_core_dpll, + omap34xx_sram_configure_core_dpll_sz); + + return 0; +} +#else +static inline int omap34xx_sram_init(void) +{ + return 0; +} +#endif + int __init omap_sram_init(void) { omap_detect_sram(); @@ -470,6 +531,8 @@ int __init omap_sram_init(void) omap1_sram_init(); else if (cpu_is_omap24xx()) omap24xx_sram_init(); + else if (cpu_is_omap34xx()) + omap34xx_sram_init(); return 0; } diff --git a/include/asm-arm/arch-omap/sdrc.h b/include/asm-arm/arch-omap/sdrc.h index 673b396..660da4d 100644 --- a/include/asm-arm/arch-omap/sdrc.h +++ b/include/asm-arm/arch-omap/sdrc.h @@ -25,6 +25,8 @@ #define SDRC_DLLB_STATUS 0x06C #define SDRC_POWER 0x070 #define SDRC_MR_0 0x084 +#define SDRC_ACTIM_CTRL_A 0x09c +#define SDRC_ACTIM_CTRL_B 0x0a0 #define SDRC_RFR_CTRL_0 0x0a4 /* diff --git a/include/asm-arm/arch-omap/sram.h b/include/asm-arm/arch-omap/sram.h index cc57dab..830e0fa 100644 --- a/include/asm-arm/arch-omap/sram.h +++ b/include/asm-arm/arch-omap/sram.h @@ -43,4 +43,23 @@ extern void omap24xx_sram_reprogram_sdrc(u32 perf_level, u32 dll_val, u32 mem_type); extern unsigned long omap24xx_sram_reprogram_sdrc_sz; + +extern void omap34xx_sram_ddr_init(u32 *slow_dll_ctrl, u32 fast_dll_ctrl, + u32 base_cs, u32 force_unlock); +extern unsigned long omap34xx_sram_ddr_init_sz; + +extern void omap34xx_sram_reprogram_sdrc(u32 perf_level, u32 dll_val, + u32 mem_type); +extern unsigned long omap34xx_sram_reprogram_sdrc_sz; + +extern u32 omap34xx_sram_set_prcm(u32 dpll_ctrl_val, u32 sdrc_rfr_val, + int bypass); +extern unsigned long omap34xx_sram_set_prcm_sz; + +extern u32 omap34xx_sram_reprogram_gpmc(u32 perf_level); +extern unsigned long omap34xx_sram_reprogram_gpmc_sz; + +extern u32 omap34xx_sram_configure_core_dpll(u32 m, u32 n, u32 freqsel, u32 m2); +extern unsigned long omap34xx_sram_configure_core_dpll_sz; + #endif
