* Patch by Nicolas Lacressonniere, 11 Jun 2003:
Modifications for Atmel AT91RM9200DK ARM920T based development kit
- Add Atmel DataFlash support for reading and writing.
- Add possibility to boot a Linux from DataFlash with BOOTM command.
- Add Flash detection on Atmel AT91RM9200DK
(between Atmel AT49BV1614 and AT49BV1614A flashes)
- Replace old Ethernet PHY layer functions
- Change link address
* Patch by Frank Smith, 9 Jun 2003:
use CRIT_EXCEPTION for machine check on 4xx
* Patch by Detlev Zundel, 13 Jun 2003:
added implementation of the "carinfo" command in cmd_immap.c
This commit is contained in:
wdenk
245
drivers/dataflash.c
Normal file
245
drivers/dataflash.c
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/* LowLevel function for ATMEL DataFlash support
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* Author : Hamid Ikdoumi (Atmel)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <config.h>
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#ifdef CONFIG_HAS_DATAFLASH
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#include <asm/hardware.h>
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#include <dataflash.h>
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AT91S_DATAFLASH_INFO dataflash_info[CFG_MAX_DATAFLASH_BANKS];
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static AT91S_DataFlash DataFlashInst;
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int cs[][CFG_MAX_DATAFLASH_BANKS] = {
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{CFG_DATAFLASH_LOGIC_ADDR_CS0, 0}, /* Logical adress, CS */
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{CFG_DATAFLASH_LOGIC_ADDR_CS3, 3}
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};
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extern void AT91F_SpiInit (void);
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extern int AT91F_DataflashProbe (int i, AT91PS_DataflashDesc pDesc);
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extern int AT91F_DataFlashRead (AT91PS_DataFlash pDataFlash,
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unsigned long addr,
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unsigned long size, char *buffer);
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int AT91F_DataflashInit (void)
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{
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int i, j;
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int dfcode;
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AT91F_SpiInit ();
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for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
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dataflash_info[i].id = 0;
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dataflash_info[i].Device.pages_number = 0;
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dfcode = AT91F_DataflashProbe (cs[i][1], &dataflash_info[i].Desc);
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switch (dfcode) {
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case AT45DB161:
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dataflash_info[i].Device.pages_number = 4096;
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dataflash_info[i].Device.pages_size = 528;
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dataflash_info[i].Device.page_offset = 10;
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dataflash_info[i].Device.byte_mask = 0x300;
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dataflash_info[i].Device.cs = cs[i][1];
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dataflash_info[i].Desc.DataFlash_state = IDLE;
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dataflash_info[i].logical_address = cs[i][0];
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dataflash_info[i].id = dfcode;
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break;
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case AT45DB321:
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dataflash_info[i].Device.pages_number = 8192;
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dataflash_info[i].Device.pages_size = 528;
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dataflash_info[i].Device.page_offset = 10;
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dataflash_info[i].Device.byte_mask = 0x300;
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dataflash_info[i].Device.cs = cs[i][1];
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dataflash_info[i].Desc.DataFlash_state = IDLE;
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dataflash_info[i].logical_address = cs[i][0];
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dataflash_info[i].id = dfcode;
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break;
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case AT45DB642:
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dataflash_info[i].Device.pages_number = 8192;
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dataflash_info[i].Device.pages_size = 1056;
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dataflash_info[i].Device.page_offset = 11;
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dataflash_info[i].Device.byte_mask = 0x700;
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dataflash_info[i].Device.cs = cs[i][1];
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dataflash_info[i].Desc.DataFlash_state = IDLE;
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dataflash_info[i].logical_address = cs[i][0];
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dataflash_info[i].id = dfcode;
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break;
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default:
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break;
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}
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for (j = 0; j < dataflash_info[i].Device.pages_number; j++)
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dataflash_info[i].protect[j] = FLAG_PROTECT_SET;
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}
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return (1);
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}
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void dataflash_print_info (void)
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{
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int i;
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for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
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if (dataflash_info[i].id != 0) {
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printf ("DataFlash:");
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switch (dataflash_info[i].id) {
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case AT45DB161:
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printf ("AT45DB161\n");
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break;
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case AT45DB321:
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printf ("AT45DB321\n");
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break;
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case AT45DB642:
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printf ("AT45DB642\n");
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break;
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}
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printf ("Nb pages: %6d\n"
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"Page Size: %6d\n"
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"Size=%8d bytes\n"
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"Logical address: 0x%08X\n",
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(unsigned int) dataflash_info[i].Device.pages_number,
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(unsigned int) dataflash_info[i].Device.pages_size,
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(unsigned int) dataflash_info[i].Device.pages_number *
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dataflash_info[i].Device.pages_size,
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(unsigned int) dataflash_info[i].logical_address);
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}
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}
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_DataflashSelect */
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/* Object : Select the correct device */
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/*------------------------------------------------------------------------------*/
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AT91PS_DataFlash AT91F_DataflashSelect (AT91PS_DataFlash pFlash,
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unsigned int *addr)
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{
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char addr_valid = 0;
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int i;
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for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++)
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if ((*addr & 0xFF000000) == dataflash_info[i].logical_address) {
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addr_valid = 1;
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break;
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}
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if (!addr_valid) {
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pFlash = (AT91PS_DataFlash) 0;
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return pFlash;
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}
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pFlash->pDataFlashDesc = &(dataflash_info[i].Desc);
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pFlash->pDevice = &(dataflash_info[i].Device);
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*addr -= dataflash_info[i].logical_address;
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return (pFlash);
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : addr_dataflash */
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/* Object : Test if address is valid */
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/*------------------------------------------------------------------------------*/
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int addr_dataflash (unsigned long addr)
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{
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int addr_valid = 0;
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int i;
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for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
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if ((((int) addr) & 0xFF000000) ==
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dataflash_info[i].logical_address) {
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addr_valid = 1;
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break;
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}
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}
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return addr_valid;
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : read_dataflash */
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/* Object : dataflash memory read */
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/*------------------------------------------------------------------------------*/
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int read_dataflash (unsigned long addr, unsigned long size, char *result)
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{
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int AddrToRead = addr;
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AT91PS_DataFlash pFlash = &DataFlashInst;
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pFlash = AT91F_DataflashSelect (pFlash, &AddrToRead);
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if (pFlash == 0)
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return -1;
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return (AT91F_DataFlashRead (pFlash, AddrToRead, size, result));
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}
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/*-----------------------------------------------------------------------------*/
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/* Function Name : write_dataflash */
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/* Object : write a block in dataflash */
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/*-----------------------------------------------------------------------------*/
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int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
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unsigned long size)
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{
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extern AT91S_DataFlashStatus AT91F_DataFlashWrite(
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AT91PS_DataFlash, uchar *, int, int);
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int AddrToWrite = addr_dest;
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AT91PS_DataFlash pFlash = &DataFlashInst;
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pFlash = AT91F_DataflashSelect (pFlash, &AddrToWrite);
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if (AddrToWrite == -1)
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return -1;
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return AT91F_DataFlashWrite (pFlash, (char *) addr_src, AddrToWrite,
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size);
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}
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void dataflash_perror (int err)
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{
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switch (err) {
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case ERR_OK:
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break;
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case ERR_TIMOUT:
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printf ("Timeout writing to DataFlash\n");
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break;
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case ERR_PROTECTED:
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printf ("Can't write to protected DataFlash sectors\n");
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break;
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case ERR_INVAL:
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printf ("Outside available DataFlash\n");
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break;
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case ERR_UNKNOWN_FLASH_TYPE:
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printf ("Unknown Type of DataFlash\n");
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break;
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case ERR_PROG_ERROR:
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printf ("General DataFlash Programming Error\n");
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break;
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default:
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printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
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break;
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}
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}
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#endif
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