diff options
| author | Harald Welte <laforge@gnumonks.org> | 2011-07-04 20:52:54 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2011-07-04 20:52:54 +0200 |
| commit | 044ad7c3987460ede48ff27afd6bdb0ca05a0432 (patch) | |
| tree | 924818cdb0d39ca08aec540d18da7bd406eaae8c /boards/at91cap9-stk/board_memories.c | |
import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v1501120100901_softpack_1_9_v_1_0_svn_v15011
it's sad to see that atmel doesn't publish their svn repo or has
a centralized location or even puts proper version/release info
into the library itself
Diffstat (limited to 'boards/at91cap9-stk/board_memories.c')
| -rw-r--r-- | boards/at91cap9-stk/board_memories.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/boards/at91cap9-stk/board_memories.c b/boards/at91cap9-stk/board_memories.c new file mode 100644 index 0000000..aa0f22a --- /dev/null +++ b/boards/at91cap9-stk/board_memories.c @@ -0,0 +1,255 @@ +/* ----------------------------------------------------------------------------
+ * ATMEL Microcontroller Software Support
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/*
+ Title: Memories implementation
+*/
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+
+#include <board.h>
+#include <pio/pio.h>
+#include "board_memories.h"
+
+/*
+ Macros:
+ READ - Reads a register value. Useful to add trace information to read
+ accesses.
+ WRITE - Writes data in a register. Useful to add trace information to
+ write accesses.
+*/
+#define READ(peripheral, register) (peripheral->register)
+#define WRITE(peripheral, register, value) (peripheral->register = value)
+
+//------------------------------------------------------------------------------
+// Internal definitions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+// Internal functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Use in SDRAM and DDRAM configguration
+//------------------------------------------------------------------------------
+void sleep_time(unsigned int timeval)
+{
+ unsigned int i;
+ for( i=0; i<timeval; i++);
+}
+//------------------------------------------------------------------------------
+// Exported functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Initialize Vdd EBI external memory
+//------------------------------------------------------------------------------
+void BOARD_ConfigureVddMemSel(unsigned char VddMemSel)
+{
+ AT91C_BASE_CCFG->CCFG_EBICSA &= ~AT91C_EBI_OSMODE;
+
+ if(VddMemSel == VDDMEMSEL_3V3)
+ {
+ AT91C_BASE_CCFG->CCFG_EBICSA |= AT91C_EBI_OSALLN1;
+ AT91C_BASE_CCFG->CCFG_EBICSA |= AT91C_EBI_OSALLN0;
+ }
+ else
+ {
+ AT91C_BASE_CCFG->CCFG_EBICSA &= ~AT91C_EBI_OSALLN1;
+ AT91C_BASE_CCFG->CCFG_EBICSA |= AT91C_EBI_OSALLN0;
+ }
+}
+
+//------------------------------------------------------------------------------
+/// Changes the mapping of the chip so that the remap area mirrors the
+/// internal ROM or the EBI CS0.
+//------------------------------------------------------------------------------
+void BOARD_RemapRom()
+{
+ WRITE(AT91C_BASE_MATRIX, MATRIX_MRCR, 0);
+}
+
+//------------------------------------------------------------------------------
+/// Changes the mapping of the chip so that the remap area mirrors the
+/// internal RAM.
+//------------------------------------------------------------------------------
+void BOARD_RemapRam()
+{
+ WRITE(AT91C_BASE_MATRIX, MATRIX_MRCR, (AT91C_MATRIX_RCA926I | AT91C_MATRIX_RCA926D));
+}
+
+//------------------------------------------------------------------------------
+/// Initialize and configure the SDRAM
+//------------------------------------------------------------------------------
+void BOARD_ConfigureSdram(unsigned char busWidth)
+{
+ static const Pin pinsSdram[] = {PINS_SDRAM};
+ volatile unsigned int *pSdram = (unsigned int *) AT91C_EBI_SDRAM;
+ unsigned short sdrc_dbw = 0;
+
+ switch (busWidth) {
+ case 16:
+ sdrc_dbw = AT91C_B16MODE_16_BITS;
+ break;
+
+ case 32:
+ default:
+ sdrc_dbw = AT91C_B16MODE_32_BITS;
+ break;
+
+ }
+
+ // Enable corresponding PIOs
+ PIO_Configure(pinsSdram, 1);
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MDR , AT91C_MD_SDR_SDRAM
+ | sdrc_dbw); // SDRAM type 3.3V
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_CR , AT91C_NC_DDR10_SDR9
+ | AT91C_NR_13
+ | AT91C_CAS_3); // row = 13, column = 9 SDRAM CAS = 3
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_LPR , 0x00000000); // Low power register => Low-power is inhibited // No define
+
+ sleep_time(50000); // --------- WAIT ---------
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_NOP_CMD); // NOP command
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_NOP_CMD); // NOP command
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_NOP_CMD); // NOP command
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_PRCGALL_CMD); // Precharge All Banks command
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ sleep_time(50000); // --------- WAIT ---------
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_RFSH_CMD); // AutoRefresh command
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ sleep_time(50000); // --------- WAIT ---------
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_RFSH_CMD); // AutoRefresh command
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ sleep_time(50000); // --------- WAIT ---------
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_LMR_CMD); // Set MR JEDEC compliant : Load mode Register command
+ pSdram[19] = 0x5a5a5b5b; // Perform LMR burst=1, lat=2
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_MR, AT91C_MODE_NORMAL_CMD); // Set Normal mode : Any access to the DDRSDRAMC is decoded normally
+ pSdram[0] = 0x00000000; // Dummy read to access SDRAM : validate preceeding command
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_RTR, 781); // Set Refresh Timer (ex: ((64 x 10^-3)/8192) x 100 x 10^6 ) => 781 for 100 MHz
+
+ WRITE(AT91C_BASE_SDDRC, SDDRC_HS, AT91C_OVL); // High speed register : Optimization is disabled
+
+ sleep_time(50000); // --------- WAIT ---------
+}
+ +
+//------------------------------------------------------------------------------
+/// Initialize and configure the DDRAM
+//------------------------------------------------------------------------------
+void BOARD_ConfigureDdram(
+ unsigned char ddrModel,
+ unsigned char busWidth
+ )
+{ +
+} +
+//------------------------------------------------------------------------------
+/// Configures the EBI for NandFlash access at 100MHz.
+/// \Param busWidth Bus width
+//------------------------------------------------------------------------------
+void BOARD_ConfigureNandFlash(unsigned char busWidth)
+{
+ // Configure EBI
+ AT91C_BASE_CCFG->CCFG_EBICSA |= AT91C_EBI_CS3A_SM;
+
+ // Configure SMC
+
+ // Configure SMC
+ AT91C_BASE_SMC->SMC_SETUP3 = 0x00010001;
+ AT91C_BASE_SMC->SMC_PULSE3 = 0x03030303;
+ AT91C_BASE_SMC->SMC_CYCLE3 = 0x00050005;
+ AT91C_BASE_SMC->SMC_CTRL3 = 0x00020003;
+
+ if (busWidth == 8) {
+
+ AT91C_BASE_SMC->SMC_CTRL3 |= AT91C_SMC_DBW_WIDTH_EIGTH_BITS;
+ }
+ else if (busWidth == 16) {
+
+ AT91C_BASE_SMC->SMC_CTRL3 |= AT91C_SMC_DBW_WIDTH_SIXTEEN_BITS;
+ }
+ else if (busWidth == 32) {
+
+ AT91C_BASE_SMC->SMC_CTRL3 |= AT91C_SMC_DBW_WIDTH_THIRTY_TWO_BITS;
+ }
+}
+
+//------------------------------------------------------------------------------
+/// Configures the EBI for NandFlash access at 48MHz.
+/// \Param busWidth Bus width
+//------------------------------------------------------------------------------
+void BOARD_ConfigureNandFlash48MHz(unsigned char busWidth)
+{
+ // Configure EBI
+ AT91C_BASE_CCFG->CCFG_EBICSA |= AT91C_EBI_CS3A_SM;
+
+ // Configure SMC
+ AT91C_BASE_SMC->SMC_SETUP3 = 0x00010001;
+ AT91C_BASE_SMC->SMC_PULSE3 = 0x04030302;
+ AT91C_BASE_SMC->SMC_CYCLE3 = 0x00070004;
+ AT91C_BASE_SMC->SMC_CTRL3 = (AT91C_SMC_READMODE
+ | AT91C_SMC_WRITEMODE
+ | AT91C_SMC_NWAITM_NWAIT_DISABLE
+ | ((0x1 << 16) & AT91C_SMC_TDF));
+
+ if (busWidth == 8) {
+
+ AT91C_BASE_SMC->SMC_CTRL3 |= AT91C_SMC_DBW_WIDTH_EIGTH_BITS;
+ }
+ else if (busWidth == 16) {
+
+ AT91C_BASE_SMC->SMC_CTRL3 |= AT91C_SMC_DBW_WIDTH_SIXTEEN_BITS;
+ }
+ else if (busWidth == 32) {
+
+ AT91C_BASE_SMC->SMC_CTRL3 |= AT91C_SMC_DBW_WIDTH_THIRTY_TWO_BITS;
+ }
+}
+
|