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-rw-r--r--drivers/dataflash.c245
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
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