diff options
author | Tony Lindgren <tony@atomide.com> | 2012-10-29 14:46:30 -0700 |
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committer | Tony Lindgren <tony@atomide.com> | 2012-10-31 10:14:14 -0700 |
commit | f205cfaf6c1287aca040c51c1789b46ed63a4d78 (patch) | |
tree | cad69f53dd0f2ccc2cf2aa1d74dbb113076a39d8 /arch/arm/mach-omap1/sram-init.c | |
parent | d8cfd6c8b4f58b0c09811eefa4b9e022c75099f7 (diff) | |
download | linux-f205cfaf6c1287aca040c51c1789b46ed63a4d78.tar.bz2 |
ARM: OMAP: Move omap1 specific code to local sram.c
Let's make the omap1 specific parts private to mach-omap1.
These should not be in the shared code.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap1/sram-init.c')
-rw-r--r-- | arch/arm/mach-omap1/sram-init.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/sram-init.c b/arch/arm/mach-omap1/sram-init.c new file mode 100644 index 000000000000..6431b0f862ce --- /dev/null +++ b/arch/arm/mach-omap1/sram-init.c @@ -0,0 +1,76 @@ +/* + * OMAP SRAM detection and management + * + * Copyright (C) 2005 Nokia Corporation + * Written by Tony Lindgren <tony@atomide.com> + * + * 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 <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> + +#include <asm/fncpy.h> +#include <asm/tlb.h> +#include <asm/cacheflush.h> + +#include <asm/mach/map.h> + +#include "soc.h" +#include "sram.h" + +#define OMAP1_SRAM_PA 0x20000000 +#define SRAM_BOOTLOADER_SZ 0x80 + +/* + * The amount of SRAM depends on the core type. + * Note that we cannot try to test for SRAM here because writes + * to secure SRAM will hang the system. Also the SRAM is not + * yet mapped at this point. + */ +static void __init omap_detect_and_map_sram(void) +{ + unsigned long omap_sram_skip = SRAM_BOOTLOADER_SZ; + unsigned long omap_sram_start = OMAP1_SRAM_PA; + unsigned long omap_sram_size; + + if (cpu_is_omap7xx()) + omap_sram_size = 0x32000; /* 200K */ + else if (cpu_is_omap15xx()) + omap_sram_size = 0x30000; /* 192K */ + else if (cpu_is_omap1610() || cpu_is_omap1611() || + cpu_is_omap1621() || cpu_is_omap1710()) + omap_sram_size = 0x4000; /* 16K */ + else { + pr_err("Could not detect SRAM size\n"); + omap_sram_size = 0x4000; + } + + omap_map_sram(omap_sram_start, omap_sram_size, + omap_sram_skip, 1); +} + +static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl); + +void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl) +{ + BUG_ON(!_omap_sram_reprogram_clock); + /* On 730, bit 13 must always be 1 */ + if (cpu_is_omap7xx()) + ckctl |= 0x2000; + _omap_sram_reprogram_clock(dpllctl, ckctl); +} + +int __init omap_sram_init(void) +{ + omap_detect_and_map_sram(); + _omap_sram_reprogram_clock = + omap_sram_push(omap1_sram_reprogram_clock, + omap1_sram_reprogram_clock_sz); + + return 0; +} |