From 746bb835d3bff427fdce1809499b90fa4c4b9a05 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 1 Dec 2005 16:31:45 -0800 Subject: [PATCH] ARM: OMAP: Add memory.c for memory timings on 24xx Both clock.c and pm.c will need to access the memory timings --- arch/arm/mach-omap2/Makefile | 2 +- arch/arm/mach-omap2/clock.c | 70 +++--------------------- arch/arm/mach-omap2/clock.h | 14 ----- arch/arm/mach-omap2/memory.c | 102 +++++++++++++++++++++++++++++++++++ arch/arm/mach-omap2/memory.h | 34 ++++++++++++ 5 files changed, 145 insertions(+), 77 deletions(-) create mode 100644 arch/arm/mach-omap2/memory.c create mode 100644 arch/arm/mach-omap2/memory.h diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index b017153aa4f..4cc80f77fc9 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -3,7 +3,7 @@ # # Common support -obj-y := irq.o id.o io.o sram-fn.o prcm.o clock.o mux.o devices.o serial.o +obj-y := irq.o id.o io.o sram-fn.o memory.o prcm.o clock.o mux.o devices.o serial.o obj-$(CONFIG_OMAP_MPU_TIMER) += timer-gp.o diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c index e5f6726bd78..6f897f307d6 100644 --- a/arch/arm/mach-omap2/clock.c +++ b/arch/arm/mach-omap2/clock.c @@ -30,12 +30,12 @@ #include #include "prcm-regs.h" +#include "memory.h" #include "clock.h" //#define DOWN_VARIABLE_DPLL 1 /* Experimental */ static struct prcm_config *curr_prcm_set; -static struct memory_timings mem_timings; static u32 curr_perf_level = PRCM_FULL_SPEED; /*------------------------------------------------------------------------- @@ -385,76 +385,23 @@ static u32 omap2_dll_force_needed(void) return 0; } -static void omap2_init_memory_params(u32 force_lock_to_unlock_mode) -{ - unsigned long dll_cnt; - u32 fast_dll = 0; - - mem_timings.m_type = !((SDRC_MR_0 & 0x3) == 0x1); /* DDR = 1, SDR = 0 */ - - /* 2422 es2.05 and beyond has a single SIP DDR instead of 2 like others. - * In the case of 2422, its ok to use CS1 instead of CS0. - */ - -#if 0 /* FIXME: Enable after 24xx cpu detection works */ - ctype = get_cpu_type(); - if (cpu_is_omap2422()) - mem_timings.base_cs = 1; - else -#endif - mem_timings.base_cs = 0; - - if (mem_timings.m_type != M_DDR) - return; - - /* With DDR we need to determine the low frequency DLL value */ - if (((mem_timings.fast_dll_ctrl & (1 << 2)) == M_LOCK_CTRL)) - mem_timings.dll_mode = M_UNLOCK; - else - mem_timings.dll_mode = M_LOCK; - - if (mem_timings.base_cs == 0) { - fast_dll = SDRC_DLLA_CTRL; - dll_cnt = SDRC_DLLA_STATUS & 0xff00; - } else { - fast_dll = SDRC_DLLB_CTRL; - dll_cnt = SDRC_DLLB_STATUS & 0xff00; - } - if (force_lock_to_unlock_mode) { - fast_dll &= ~0xff00; - fast_dll |= dll_cnt; /* Current lock mode */ - } - /* set fast timings with DLL filter disabled */ - mem_timings.fast_dll_ctrl = (fast_dll | (3 << 8)); - - /* No disruptions, DDR will be offline & C-ABI not followed */ - omap2_sram_ddr_init(&mem_timings.slow_dll_ctrl, - mem_timings.fast_dll_ctrl, - mem_timings.base_cs, - force_lock_to_unlock_mode); - mem_timings.slow_dll_ctrl &= 0xff00; /* Keep lock value */ - - /* Turn status into unlock ctrl */ - mem_timings.slow_dll_ctrl |= - ((mem_timings.fast_dll_ctrl & 0xF) | (1 << 2)); - - /* 90 degree phase for anything below 133Mhz + disable DLL filter */ - mem_timings.slow_dll_ctrl |= ((1 << 1) | (3 << 8)); -} - static u32 omap2_reprogram_sdrc(u32 level, u32 force) { + u32 slow_dll_ctrl, fast_dll_ctrl, m_type; u32 prev = curr_perf_level, flags; if ((curr_perf_level == level) && !force) return prev; + m_type = omap2_memory_get_type(); + slow_dll_ctrl = omap2_memory_get_slow_dll_ctrl(); + fast_dll_ctrl = omap2_memory_get_fast_dll_ctrl(); + if (level == PRCM_HALF_SPEED) { local_irq_save(flags); PRCM_VOLTSETUP = 0xffff; omap2_sram_reprogram_sdrc(PRCM_HALF_SPEED, - mem_timings.slow_dll_ctrl, - mem_timings.m_type); + slow_dll_ctrl, m_type); curr_perf_level = PRCM_HALF_SPEED; local_irq_restore(flags); } @@ -462,8 +409,7 @@ static u32 omap2_reprogram_sdrc(u32 level, u32 force) local_irq_save(flags); PRCM_VOLTSETUP = 0xffff; omap2_sram_reprogram_sdrc(PRCM_FULL_SPEED, - mem_timings.fast_dll_ctrl, - mem_timings.m_type); + fast_dll_ctrl, m_type); curr_perf_level = PRCM_FULL_SPEED; local_irq_restore(flags); } diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h index 4daf7c8bced..07f1efa0667 100644 --- a/arch/arm/mach-omap2/clock.h +++ b/arch/arm/mach-omap2/clock.h @@ -33,20 +33,6 @@ static u32 omap2_clksel_get_divisor(struct clk *clk); #define RATE_IN_242X (1 << 0) #define RATE_IN_243X (1 << 1) -/* Memory timings */ -#define M_DDR 1 -#define M_LOCK_CTRL (1 << 2) -#define M_UNLOCK 0 -#define M_LOCK 1 - -struct memory_timings { - u32 m_type; /* ddr = 1, sdr = 0 */ - u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */ - u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */ - u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */ - u32 base_cs; /* base chip select to use for calculations */ -}; - /* Key dividers which make up a PRCM set. Ratio's for a PRCM are mandated. * xtal_speed, dpll_speed, mpu_speed, CM_CLKSEL_MPU,CM_CLKSEL_DSP * CM_CLKSEL_GFX, CM_CLKSEL1_CORE, CM_CLKSEL1_PLL CM_CLKSEL2_PLL, CM_CLKSEL_MDM diff --git a/arch/arm/mach-omap2/memory.c b/arch/arm/mach-omap2/memory.c new file mode 100644 index 00000000000..bd02353d9c3 --- /dev/null +++ b/arch/arm/mach-omap2/memory.c @@ -0,0 +1,102 @@ +/* + * linux/arch/arm/mach-omap2/memory.c + * + * Memory timing related functions for OMAP24XX + * + * Copyright (C) 2005 Texas Instruments Inc. + * Richard Woodruff + * + * Copyright (C) 2005 Nokia Corporation + * Tony Lindgren + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include +#include +#include + +#include "prcm-regs.h" +#include "memory.h" + +static struct memory_timings mem_timings; + +u32 omap2_memory_get_slow_dll_ctrl(void) +{ + return mem_timings.slow_dll_ctrl; +} + +u32 omap2_memory_get_fast_dll_ctrl(void) +{ + return mem_timings.fast_dll_ctrl; +} + +u32 omap2_memory_get_type(void) +{ + return mem_timings.m_type; +} + +void omap2_init_memory_params(u32 force_lock_to_unlock_mode) +{ + unsigned long dll_cnt; + u32 fast_dll = 0; + + mem_timings.m_type = !((SDRC_MR_0 & 0x3) == 0x1); /* DDR = 1, SDR = 0 */ + + /* 2422 es2.05 and beyond has a single SIP DDR instead of 2 like others. + * In the case of 2422, its ok to use CS1 instead of CS0. + */ + if (cpu_is_omap2422()) + mem_timings.base_cs = 1; + else + mem_timings.base_cs = 0; + + if (mem_timings.m_type != M_DDR) + return; + + /* With DDR we need to determine the low frequency DLL value */ + if (((mem_timings.fast_dll_ctrl & (1 << 2)) == M_LOCK_CTRL)) + mem_timings.dll_mode = M_UNLOCK; + else + mem_timings.dll_mode = M_LOCK; + + if (mem_timings.base_cs == 0) { + fast_dll = SDRC_DLLA_CTRL; + dll_cnt = SDRC_DLLA_STATUS & 0xff00; + } else { + fast_dll = SDRC_DLLB_CTRL; + dll_cnt = SDRC_DLLB_STATUS & 0xff00; + } + if (force_lock_to_unlock_mode) { + fast_dll &= ~0xff00; + fast_dll |= dll_cnt; /* Current lock mode */ + } + /* set fast timings with DLL filter disabled */ + mem_timings.fast_dll_ctrl = (fast_dll | (3 << 8)); + + /* No disruptions, DDR will be offline & C-ABI not followed */ + omap2_sram_ddr_init(&mem_timings.slow_dll_ctrl, + mem_timings.fast_dll_ctrl, + mem_timings.base_cs, + force_lock_to_unlock_mode); + mem_timings.slow_dll_ctrl &= 0xff00; /* Keep lock value */ + + /* Turn status into unlock ctrl */ + mem_timings.slow_dll_ctrl |= + ((mem_timings.fast_dll_ctrl & 0xF) | (1 << 2)); + + /* 90 degree phase for anything below 133Mhz + disable DLL filter */ + mem_timings.slow_dll_ctrl |= ((1 << 1) | (3 << 8)); +} diff --git a/arch/arm/mach-omap2/memory.h b/arch/arm/mach-omap2/memory.h new file mode 100644 index 00000000000..d212eea83a0 --- /dev/null +++ b/arch/arm/mach-omap2/memory.h @@ -0,0 +1,34 @@ +/* + * linux/arch/arm/mach-omap2/memory.h + * + * Interface for memory timing related functions for OMAP24XX + * + * Copyright (C) 2005 Texas Instruments Inc. + * Richard Woodruff + * + * Copyright (C) 2005 Nokia Corporation + * Tony Lindgren + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* Memory timings */ +#define M_DDR 1 +#define M_LOCK_CTRL (1 << 2) +#define M_UNLOCK 0 +#define M_LOCK 1 + +struct memory_timings { + u32 m_type; /* ddr = 1, sdr = 0 */ + u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */ + u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */ + u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */ + u32 base_cs; /* base chip select to use for calculations */ +}; + +extern void omap2_init_memory_params(u32 force_lock_to_unlock_mode); +extern u32 omap2_memory_get_slow_dll_ctrl(void); +extern u32 omap2_memory_get_fast_dll_ctrl(void); +extern u32 omap2_memory_get_type(void); -- 2.41.1