* 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

1 files changed, 245 insertions, 0 deletions

diff --git a/drivers/dataflash.c b/drivers/dataflash.c
new file mode 100644
index 0000000..a0a4b62
--- /dev/null
+++ b/drivers/dataflash.c
@@ -0,0 +1,245 @@
+/* LowLevel function for ATMEL DataFlash support
+ * Author : Hamid Ikdoumi (Atmel)
+ *
+ * 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 <config.h>
+#ifdef CONFIG_HAS_DATAFLASH
+#include <asm/hardware.h>
+#include <dataflash.h>
+
+AT91S_DATAFLASH_INFO dataflash_info[CFG_MAX_DATAFLASH_BANKS];
+static AT91S_DataFlash DataFlashInst;
+
+int cs[][CFG_MAX_DATAFLASH_BANKS] = {
+	{CFG_DATAFLASH_LOGIC_ADDR_CS0, 0},	/* Logical adress, CS */
+	{CFG_DATAFLASH_LOGIC_ADDR_CS3, 3}
+};
+
+extern void AT91F_SpiInit (void);
+extern int AT91F_DataflashProbe (int i, AT91PS_DataflashDesc pDesc);
+extern int AT91F_DataFlashRead (AT91PS_DataFlash pDataFlash,
+				unsigned long addr,
+				unsigned long size, char *buffer);
+
+
+int AT91F_DataflashInit (void)
+{
+	int i, j;
+	int dfcode;
+
+	AT91F_SpiInit ();
+
+	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
+
+		dataflash_info[i].id = 0;
+		dataflash_info[i].Device.pages_number = 0;
+		dfcode = AT91F_DataflashProbe (cs[i][1], &dataflash_info[i].Desc);
+
+		switch (dfcode) {
+		case AT45DB161:
+			dataflash_info[i].Device.pages_number = 4096;
+			dataflash_info[i].Device.pages_size = 528;
+			dataflash_info[i].Device.page_offset = 10;
+			dataflash_info[i].Device.byte_mask = 0x300;
+			dataflash_info[i].Device.cs = cs[i][1];
+			dataflash_info[i].Desc.DataFlash_state = IDLE;
+			dataflash_info[i].logical_address = cs[i][0];
+			dataflash_info[i].id = dfcode;
+			break;
+
+		case AT45DB321:
+			dataflash_info[i].Device.pages_number = 8192;
+			dataflash_info[i].Device.pages_size = 528;
+			dataflash_info[i].Device.page_offset = 10;
+			dataflash_info[i].Device.byte_mask = 0x300;
+			dataflash_info[i].Device.cs = cs[i][1];
+			dataflash_info[i].Desc.DataFlash_state = IDLE;
+			dataflash_info[i].logical_address = cs[i][0];
+			dataflash_info[i].id = dfcode;
+			break;
+
+		case AT45DB642:
+			dataflash_info[i].Device.pages_number = 8192;
+			dataflash_info[i].Device.pages_size = 1056;
+			dataflash_info[i].Device.page_offset = 11;
+			dataflash_info[i].Device.byte_mask = 0x700;
+			dataflash_info[i].Device.cs = cs[i][1];
+			dataflash_info[i].Desc.DataFlash_state = IDLE;
+			dataflash_info[i].logical_address = cs[i][0];
+			dataflash_info[i].id = dfcode;
+			break;
+
+		default:
+			break;
+		}
+
+		for (j = 0; j < dataflash_info[i].Device.pages_number; j++)
+			dataflash_info[i].protect[j] = FLAG_PROTECT_SET;
+
+	}
+	return (1);
+}
+
+
+
+void dataflash_print_info (void)
+{
+	int i;
+
+	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
+		if (dataflash_info[i].id != 0) {
+			printf ("DataFlash:");
+			switch (dataflash_info[i].id) {
+			case AT45DB161:
+				printf ("AT45DB161\n");
+				break;
+
+			case AT45DB321:
+				printf ("AT45DB321\n");
+				break;
+
+			case AT45DB642:
+				printf ("AT45DB642\n");
+				break;
+			}
+
+			printf ("Nb pages: %6d\n"
+				"Page Size: %6d\n"
+				"Size=%8d bytes\n"
+				"Logical address: 0x%08X\n",
+				(unsigned int) dataflash_info[i].Device.pages_number,
+				(unsigned int) dataflash_info[i].Device.pages_size,
+				(unsigned int) dataflash_info[i].Device.pages_number *
+				dataflash_info[i].Device.pages_size,
+				(unsigned int) dataflash_info[i].logical_address);
+		}
+	}
+}
+
+
+/*------------------------------------------------------------------------------*/
+/* Function Name       : AT91F_DataflashSelect 					*/
+/* Object              : Select the correct device				*/
+/*------------------------------------------------------------------------------*/
+AT91PS_DataFlash AT91F_DataflashSelect (AT91PS_DataFlash pFlash,
+										unsigned int *addr)
+{
+	char addr_valid = 0;
+	int i;
+
+	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++)
+		if ((*addr & 0xFF000000) == dataflash_info[i].logical_address) {
+			addr_valid = 1;
+			break;
+		}
+	if (!addr_valid) {
+		pFlash = (AT91PS_DataFlash) 0;
+		return pFlash;
+	}
+	pFlash->pDataFlashDesc = &(dataflash_info[i].Desc);
+	pFlash->pDevice = &(dataflash_info[i].Device);
+	*addr -= dataflash_info[i].logical_address;
+	return (pFlash);
+}
+
+/*------------------------------------------------------------------------------*/
+/* Function Name       : addr_dataflash 					*/
+/* Object              : Test if address is valid				*/
+/*------------------------------------------------------------------------------*/
+int addr_dataflash (unsigned long addr)
+{
+	int addr_valid = 0;
+	int i;
+
+	for (i = 0; i < CFG_MAX_DATAFLASH_BANKS; i++) {
+		if ((((int) addr) & 0xFF000000) ==
+			dataflash_info[i].logical_address) {
+			addr_valid = 1;
+			break;
+		}
+	}
+
+	return addr_valid;
+}
+
+/*------------------------------------------------------------------------------*/
+/* Function Name       : read_dataflash 					*/
+/* Object              : dataflash memory read					*/
+/*------------------------------------------------------------------------------*/
+int read_dataflash (unsigned long addr, unsigned long size, char *result)
+{
+	int AddrToRead = addr;
+	AT91PS_DataFlash pFlash = &DataFlashInst;
+
+	pFlash = AT91F_DataflashSelect (pFlash, &AddrToRead);
+	if (pFlash == 0)
+		return -1;
+
+	return (AT91F_DataFlashRead (pFlash, AddrToRead, size, result));
+}
+
+
+/*-----------------------------------------------------------------------------*/
+/* Function Name       : write_dataflash 				       */
+/* Object              : write a block in dataflash			       */
+/*-----------------------------------------------------------------------------*/
+int write_dataflash (unsigned long addr_dest, unsigned long addr_src,
+		     unsigned long size)
+{
+	extern AT91S_DataFlashStatus AT91F_DataFlashWrite(
+			AT91PS_DataFlash, uchar *, int, int);
+	int AddrToWrite = addr_dest;
+	AT91PS_DataFlash pFlash = &DataFlashInst;
+
+	pFlash = AT91F_DataflashSelect (pFlash, &AddrToWrite);
+	if (AddrToWrite == -1)
+		return -1;
+
+	return AT91F_DataFlashWrite (pFlash, (char *) addr_src, AddrToWrite,
+								 size);
+}
+
+
+void dataflash_perror (int err)
+{
+	switch (err) {
+	case ERR_OK:
+		break;
+	case ERR_TIMOUT:
+		printf ("Timeout writing to DataFlash\n");
+		break;
+	case ERR_PROTECTED:
+		printf ("Can't write to protected DataFlash sectors\n");
+		break;
+	case ERR_INVAL:
+		printf ("Outside available DataFlash\n");
+		break;
+	case ERR_UNKNOWN_FLASH_TYPE:
+		printf ("Unknown Type of DataFlash\n");
+		break;
+	case ERR_PROG_ERROR:
+		printf ("General DataFlash Programming Error\n");
+		break;
+	default:
+		printf ("%s[%d] FIXME: rc=%d\n", __FILE__, __LINE__, err);
+		break;
+	}
+}
+
+#endif