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Blackfin: bf526-ezbrd: handle different SDRAM chips 

The BF526-EZBRD changed SDRAM chips between board revisions, so create a
timing table that can accommodate both.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Graf Yang 2009-06-18 04:32:04 +00:00 committed by Mike Frysinger
parent 8f580f7c82
commit ee48efb5dc
2 changed files with 92 additions and 1 deletions
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7
arch/blackfin/Kconfig
View File

@ -358,7 +358,7 @@ config MEM_MT48LC8M32B2B5_7
config MEM_MT48LC32M16A2TG_75
bool
depends on (BFIN527_EZKIT || BFIN532_IP0X || BLACKSTAMP || BFIN526_EZBRD)
depends on (BFIN527_EZKIT || BFIN532_IP0X || BLACKSTAMP)
default y
config MEM_MT48LC32M8A2_75
@ -366,6 +366,11 @@ config MEM_MT48LC32M8A2_75
depends on (BFIN518F_EZBRD)
default y
config MEM_MT48H32M16LFCJ_75
bool
depends on (BFIN526_EZBRD)
default y
source "arch/blackfin/mach-bf518/Kconfig"
source "arch/blackfin/mach-bf527/Kconfig"
source "arch/blackfin/mach-bf533/Kconfig"

86
arch/blackfin/include/asm/mem_init.h
View File

@ -89,6 +89,85 @@
#endif
#endif
/*
* The BF526-EZ-Board changed SDRAM chips between revisions,
* so we use below timings to accommodate both.
*/
#if defined(CONFIG_MEM_MT48H32M16LFCJ_75)
#if (CONFIG_SCLK_HZ > 119402985)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_8
#define SDRAM_tRAS_num 8
#define SDRAM_tRCD TRCD_2
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 104477612) && (CONFIG_SCLK_HZ <= 119402985)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_7
#define SDRAM_tRAS_num 7
#define SDRAM_tRCD TRCD_2
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 89552239) && (CONFIG_SCLK_HZ <= 104477612)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_6
#define SDRAM_tRAS_num 6
#define SDRAM_tRCD TRCD_2
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 74626866) && (CONFIG_SCLK_HZ <= 89552239)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_5
#define SDRAM_tRAS_num 5
#define SDRAM_tRCD TRCD_2
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 66666667) && (CONFIG_SCLK_HZ <= 74626866)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_4
#define SDRAM_tRAS_num 4
#define SDRAM_tRCD TRCD_2
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 59701493) && (CONFIG_SCLK_HZ <= 66666667)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_4
#define SDRAM_tRAS_num 4
#define SDRAM_tRCD TRCD_1
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 44776119) && (CONFIG_SCLK_HZ <= 59701493)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_3
#define SDRAM_tRAS_num 3
#define SDRAM_tRCD TRCD_1
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 29850746) && (CONFIG_SCLK_HZ <= 44776119)
#define SDRAM_tRP TRP_1
#define SDRAM_tRP_num 1
#define SDRAM_tRAS TRAS_3
#define SDRAM_tRAS_num 3
#define SDRAM_tRCD TRCD_1
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ <= 29850746)
#define SDRAM_tRP TRP_1
#define SDRAM_tRP_num 1
#define SDRAM_tRAS TRAS_2
#define SDRAM_tRAS_num 2
#define SDRAM_tRCD TRCD_1
#define SDRAM_tWR TWR_2
#endif
#endif
#if defined(CONFIG_MEM_MT48LC16M8A2TG_75) || \
defined(CONFIG_MEM_MT48LC8M32B2B5_7)
/*SDRAM INFORMATION: */
@ -109,6 +188,13 @@
#define SDRAM_CL CL_3
#endif
#if defined(CONFIG_MEM_MT48H32M16LFCJ_75)
/*SDRAM INFORMATION: */
#define SDRAM_Tref 64 /* Refresh period in milliseconds */
#define SDRAM_NRA 8192 /* Number of row addresses in SDRAM */
#define SDRAM_CL CL_2
#endif
#ifdef CONFIG_BFIN_KERNEL_CLOCK_MEMINIT_CALC
/* Equation from section 17 (p17-46) of BF533 HRM */