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kernel-fxtec-pro1x/include/asm-blackfin/mach-bf537/mem_init.h
Michael Hennerich 68e2fc78e5 Blackfin arch: Fix bug - Kernel does not boot if re-program clocks 
Don't write conflicting data to EBIU_SDBCTL after the SDRAM is
configured. This can cause data corruption, since we might change SDRAM
row and column addressing modes.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-14 16:51:57 +08:00

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/*
* File: include/asm-blackfin/mach-bf537/mem_init.h
* Based on:
* Author:
*
* Created:
* Description:
*
* Rev:
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* 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, 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; see the file COPYING.
* If not, write to the Free Software Foundation,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if (CONFIG_MEM_MT48LC16M16A2TG_75 || CONFIG_MEM_MT48LC64M4A2FB_7E || CONFIG_MEM_MT48LC16M8A2TG_75 || CONFIG_MEM_GENERIC_BOARD || CONFIG_MEM_MT48LC32M8A2_75)
#if (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 > 104477612) && (CONFIG_SCLK_HZ <= 119402985)
#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 > 89552239) && (CONFIG_SCLK_HZ <= 104477612)
#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 > 74626866) && (CONFIG_SCLK_HZ <= 89552239)
#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 > 66666667) && (CONFIG_SCLK_HZ <= 74626866)
#define SDRAM_tRP TRP_2
#define SDRAM_tRP_num 2
#define SDRAM_tRAS TRAS_3
#define SDRAM_tRAS_num 3
#define SDRAM_tRCD TRCD_2
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 59701493) && (CONFIG_SCLK_HZ <= 66666667)
#define SDRAM_tRP TRP_1
#define SDRAM_tRP_num 1
#define SDRAM_tRAS TRAS_4
#define SDRAM_tRAS_num 3
#define SDRAM_tRCD TRCD_1
#define SDRAM_tWR TWR_2
#endif
#if (CONFIG_SCLK_HZ > 44776119) && (CONFIG_SCLK_HZ <= 59701493)
#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) && (CONFIG_SCLK_HZ <= 44776119)
#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
#if (CONFIG_SCLK_HZ <= 29850746)
#define SDRAM_tRP TRP_1
#define SDRAM_tRP_num 1
#define SDRAM_tRAS TRAS_1
#define SDRAM_tRAS_num 1
#define SDRAM_tRCD TRCD_1
#define SDRAM_tWR TWR_2
#endif
#endif
#if (CONFIG_MEM_MT48LC16M16A2TG_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_3
#endif
#if (CONFIG_MEM_MT48LC16M8A2TG_75)
/*SDRAM INFORMATION: */
#define SDRAM_Tref 64 /* Refresh period in milliseconds */
#define SDRAM_NRA 4096 /* Number of row addresses in SDRAM */
#define SDRAM_CL CL_3
#endif
#if (CONFIG_MEM_MT48LC32M8A2_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_3
#endif
#if (CONFIG_MEM_MT48LC64M4A2FB_7E)
/*SDRAM INFORMATION: */
#define SDRAM_Tref 64 /* Refresh period in milliseconds */
#define SDRAM_NRA 8192 /* Number of row addresses in SDRAM */
#define SDRAM_CL CL_3
#endif
#if (CONFIG_MEM_GENERIC_BOARD)
/*SDRAM INFORMATION: Modify this for your board */
#define SDRAM_Tref 64 /* Refresh period in milliseconds */
#define SDRAM_NRA 8192 /* Number of row addresses in SDRAM */
#define SDRAM_CL CL_3
#endif
/* Equation from section 17 (p17-46) of BF533 HRM */
#define mem_SDRRC (((CONFIG_SCLK_HZ / 1000) * SDRAM_Tref) / SDRAM_NRA) - (SDRAM_tRAS_num + SDRAM_tRP_num)
/* Enable SCLK Out */
#define mem_SDGCTL (SCTLE | SDRAM_CL | SDRAM_tRAS | SDRAM_tRP | SDRAM_tRCD | SDRAM_tWR | PSS)
#if defined CONFIG_CLKIN_HALF
#define CLKIN_HALF 1
#else
#define CLKIN_HALF 0
#endif
#if defined CONFIG_PLL_BYPASS
#define PLL_BYPASS 1
#else
#define PLL_BYPASS 0
#endif
/***************************************Currently Not Being Used *********************************/
#define flash_EBIU_AMBCTL_WAT ((CONFIG_FLASH_SPEED_BWAT * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
#define flash_EBIU_AMBCTL_RAT ((CONFIG_FLASH_SPEED_BRAT * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
#define flash_EBIU_AMBCTL_HT ((CONFIG_FLASH_SPEED_BHT * 4) / (4000000000 / CONFIG_SCLK_HZ))
#define flash_EBIU_AMBCTL_ST ((CONFIG_FLASH_SPEED_BST * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
#define flash_EBIU_AMBCTL_TT ((CONFIG_FLASH_SPEED_BTT * 4) / (4000000000 / CONFIG_SCLK_HZ)) + 1
#if (flash_EBIU_AMBCTL_TT > 3)
#define flash_EBIU_AMBCTL0_TT B0TT_4
#endif
#if (flash_EBIU_AMBCTL_TT == 3)
#define flash_EBIU_AMBCTL0_TT B0TT_3
#endif
#if (flash_EBIU_AMBCTL_TT == 2)
#define flash_EBIU_AMBCTL0_TT B0TT_2
#endif
#if (flash_EBIU_AMBCTL_TT < 2)
#define flash_EBIU_AMBCTL0_TT B0TT_1
#endif
#if (flash_EBIU_AMBCTL_ST > 3)
#define flash_EBIU_AMBCTL0_ST B0ST_4
#endif
#if (flash_EBIU_AMBCTL_ST == 3)
#define flash_EBIU_AMBCTL0_ST B0ST_3
#endif
#if (flash_EBIU_AMBCTL_ST == 2)
#define flash_EBIU_AMBCTL0_ST B0ST_2
#endif
#if (flash_EBIU_AMBCTL_ST < 2)
#define flash_EBIU_AMBCTL0_ST B0ST_1
#endif
#if (flash_EBIU_AMBCTL_HT > 2)
#define flash_EBIU_AMBCTL0_HT B0HT_3
#endif
#if (flash_EBIU_AMBCTL_HT == 2)
#define flash_EBIU_AMBCTL0_HT B0HT_2
#endif
#if (flash_EBIU_AMBCTL_HT == 1)
#define flash_EBIU_AMBCTL0_HT B0HT_1
#endif
#if (flash_EBIU_AMBCTL_HT == 0 && CONFIG_FLASH_SPEED_BHT == 0)
#define flash_EBIU_AMBCTL0_HT B0HT_0
#endif
#if (flash_EBIU_AMBCTL_HT == 0 && CONFIG_FLASH_SPEED_BHT != 0)
#define flash_EBIU_AMBCTL0_HT B0HT_1
#endif
#if (flash_EBIU_AMBCTL_WAT > 14)
#define flash_EBIU_AMBCTL0_WAT B0WAT_15
#endif
#if (flash_EBIU_AMBCTL_WAT == 14)
#define flash_EBIU_AMBCTL0_WAT B0WAT_14
#endif
#if (flash_EBIU_AMBCTL_WAT == 13)
#define flash_EBIU_AMBCTL0_WAT B0WAT_13
#endif
#if (flash_EBIU_AMBCTL_WAT == 12)
#define flash_EBIU_AMBCTL0_WAT B0WAT_12
#endif
#if (flash_EBIU_AMBCTL_WAT == 11)
#define flash_EBIU_AMBCTL0_WAT B0WAT_11
#endif
#if (flash_EBIU_AMBCTL_WAT == 10)
#define flash_EBIU_AMBCTL0_WAT B0WAT_10
#endif
#if (flash_EBIU_AMBCTL_WAT == 9)
#define flash_EBIU_AMBCTL0_WAT B0WAT_9
#endif
#if (flash_EBIU_AMBCTL_WAT == 8)
#define flash_EBIU_AMBCTL0_WAT B0WAT_8
#endif
#if (flash_EBIU_AMBCTL_WAT == 7)
#define flash_EBIU_AMBCTL0_WAT B0WAT_7
#endif
#if (flash_EBIU_AMBCTL_WAT == 6)
#define flash_EBIU_AMBCTL0_WAT B0WAT_6
#endif
#if (flash_EBIU_AMBCTL_WAT == 5)
#define flash_EBIU_AMBCTL0_WAT B0WAT_5
#endif
#if (flash_EBIU_AMBCTL_WAT == 4)
#define flash_EBIU_AMBCTL0_WAT B0WAT_4
#endif
#if (flash_EBIU_AMBCTL_WAT == 3)
#define flash_EBIU_AMBCTL0_WAT B0WAT_3
#endif
#if (flash_EBIU_AMBCTL_WAT == 2)
#define flash_EBIU_AMBCTL0_WAT B0WAT_2
#endif
#if (flash_EBIU_AMBCTL_WAT == 1)
#define flash_EBIU_AMBCTL0_WAT B0WAT_1
#endif
#if (flash_EBIU_AMBCTL_RAT > 14)
#define flash_EBIU_AMBCTL0_RAT B0RAT_15
#endif
#if (flash_EBIU_AMBCTL_RAT == 14)
#define flash_EBIU_AMBCTL0_RAT B0RAT_14
#endif
#if (flash_EBIU_AMBCTL_RAT == 13)
#define flash_EBIU_AMBCTL0_RAT B0RAT_13
#endif
#if (flash_EBIU_AMBCTL_RAT == 12)
#define flash_EBIU_AMBCTL0_RAT B0RAT_12
#endif
#if (flash_EBIU_AMBCTL_RAT == 11)
#define flash_EBIU_AMBCTL0_RAT B0RAT_11
#endif
#if (flash_EBIU_AMBCTL_RAT == 10)
#define flash_EBIU_AMBCTL0_RAT B0RAT_10
#endif
#if (flash_EBIU_AMBCTL_RAT == 9)
#define flash_EBIU_AMBCTL0_RAT B0RAT_9
#endif
#if (flash_EBIU_AMBCTL_RAT == 8)
#define flash_EBIU_AMBCTL0_RAT B0RAT_8
#endif
#if (flash_EBIU_AMBCTL_RAT == 7)
#define flash_EBIU_AMBCTL0_RAT B0RAT_7
#endif
#if (flash_EBIU_AMBCTL_RAT == 6)
#define flash_EBIU_AMBCTL0_RAT B0RAT_6
#endif
#if (flash_EBIU_AMBCTL_RAT == 5)
#define flash_EBIU_AMBCTL0_RAT B0RAT_5
#endif
#if (flash_EBIU_AMBCTL_RAT == 4)
#define flash_EBIU_AMBCTL0_RAT B0RAT_4
#endif
#if (flash_EBIU_AMBCTL_RAT == 3)
#define flash_EBIU_AMBCTL0_RAT B0RAT_3
#endif
#if (flash_EBIU_AMBCTL_RAT == 2)
#define flash_EBIU_AMBCTL0_RAT B0RAT_2
#endif
#if (flash_EBIU_AMBCTL_RAT == 1)
#define flash_EBIU_AMBCTL0_RAT B0RAT_1
#endif
#define flash_EBIU_AMBCTL0 \
(flash_EBIU_AMBCTL0_WAT | flash_EBIU_AMBCTL0_RAT | flash_EBIU_AMBCTL0_HT | \
flash_EBIU_AMBCTL0_ST | flash_EBIU_AMBCTL0_TT | CONFIG_FLASH_SPEED_RDYEN)
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