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authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:15 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:25 +0200
commit8a15c2d10b0b784f0cfba1240f06a4d933b975fa (patch)
treeef8243267f89fb66a5ff9f3085b80199dfa31599 /cpu/at32ap/hsdramc.c
parent1e3827d9cf9442e188604fd1099ac38375135125 (diff)
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avr32: Move cpu/at32ap/* to arch/avr32/cpu/*
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/at32ap/hsdramc.c')
-rw-r--r--cpu/at32ap/hsdramc.c117
1 files changed, 0 insertions, 117 deletions
diff --git a/cpu/at32ap/hsdramc.c b/cpu/at32ap/hsdramc.c
deleted file mode 100644
index b6eae66..0000000
--- a/cpu/at32ap/hsdramc.c
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * Copyright (C) 2005-2006 Atmel Corporation
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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 <common.h>
-
-#include <asm/io.h>
-#include <asm/sdram.h>
-
-#include <asm/arch/clk.h>
-#include <asm/arch/memory-map.h>
-
-#include "hsdramc1.h"
-
-unsigned long sdram_init(void *sdram_base, const struct sdram_config *config)
-{
- unsigned long sdram_size;
- uint32_t cfgreg;
- unsigned int i;
-
- cfgreg = (HSDRAMC1_BF(NC, config->col_bits - 8)
- | HSDRAMC1_BF(NR, config->row_bits - 11)
- | HSDRAMC1_BF(NB, config->bank_bits - 1)
- | HSDRAMC1_BF(CAS, config->cas)
- | HSDRAMC1_BF(TWR, config->twr)
- | HSDRAMC1_BF(TRC, config->trc)
- | HSDRAMC1_BF(TRP, config->trp)
- | HSDRAMC1_BF(TRCD, config->trcd)
- | HSDRAMC1_BF(TRAS, config->tras)
- | HSDRAMC1_BF(TXSR, config->txsr));
-
- if (config->data_bits == SDRAM_DATA_16BIT)
- cfgreg |= HSDRAMC1_BIT(DBW);
-
- hsdramc1_writel(CR, cfgreg);
-
- /* Send a NOP to turn on the clock (necessary on some chips) */
- hsdramc1_writel(MR, HSDRAMC1_MODE_NOP);
- hsdramc1_readl(MR);
- writel(0, sdram_base);
-
- /*
- * Initialization sequence for SDRAM, from the data sheet:
- *
- * 1. A minimum pause of 200 us is provided to precede any
- * signal toggle.
- */
- udelay(200);
-
- /*
- * 2. A Precharge All command is issued to the SDRAM
- */
- hsdramc1_writel(MR, HSDRAMC1_MODE_BANKS_PRECHARGE);
- hsdramc1_readl(MR);
- writel(0, sdram_base);
-
- /*
- * 3. Eight auto-refresh (CBR) cycles are provided
- */
- hsdramc1_writel(MR, HSDRAMC1_MODE_AUTO_REFRESH);
- hsdramc1_readl(MR);
- for (i = 0; i < 8; i++)
- writel(0, sdram_base);
-
- /*
- * 4. A mode register set (MRS) cycle is issued to program
- * SDRAM parameters, in particular CAS latency and burst
- * length.
- *
- * The address will be chosen by the SDRAMC automatically; we
- * just have to make sure BA[1:0] are set to 0.
- */
- hsdramc1_writel(MR, HSDRAMC1_MODE_LOAD_MODE);
- hsdramc1_readl(MR);
- writel(0, sdram_base);
-
- /*
- * 5. The application must go into Normal Mode, setting Mode
- * to 0 in the Mode Register and performing a write access
- * at any location in the SDRAM.
- */
- hsdramc1_writel(MR, HSDRAMC1_MODE_NORMAL);
- hsdramc1_readl(MR);
- writel(0, sdram_base);
-
- /*
- * 6. Write refresh rate into SDRAMC refresh timer count
- * register (refresh rate = timing between refresh cycles).
- */
- hsdramc1_writel(TR, config->refresh_period);
-
- if (config->data_bits == SDRAM_DATA_16BIT)
- sdram_size = 1 << (config->row_bits + config->col_bits
- + config->bank_bits + 1);
- else
- sdram_size = 1 << (config->row_bits + config->col_bits
- + config->bank_bits + 2);
-
- return sdram_size;
-}