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/* ----------------------------------------------------------------------------
* 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.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "at26.h"
#include <board.h>
#include <utility/assert.h>
//------------------------------------------------------------------------------
// Internal definitions
//------------------------------------------------------------------------------
/// SPI clock frequency used in Hz.
#define SPCK 1000000
/// SPI chip select configuration value.
#define CSR (AT91C_SPI_NCPHA | \
SPID_CSR_DLYBCT(BOARD_MCK, 100) | \
SPID_CSR_DLYBS(BOARD_MCK, 5) | \
SPID_CSR_SCBR(BOARD_MCK, SPCK))
/// Number of recognized dataflash.
#define NUMDATAFLASH (sizeof(at26Devices) / sizeof(At26Desc))
//------------------------------------------------------------------------------
// Internal variables
//------------------------------------------------------------------------------
/// Array of recognized serial firmware dataflash chips.
static const At26Desc at26Devices[] = {
// name, Jedec ID, size, page size, block size, block erase command
{"AT25DF041A" , 0x0001441F, 1 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"AT25DF161" , 0x0002461F, 2 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"AT26DF081A" , 0x0001451F, 1 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"AT26DF0161" , 0x0000461F, 2 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"AT26DF161A" , 0x0001461F, 2 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"AT26DF321 " , 0x0000471F, 8 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
// Manufacturer: ST
{"M25P05" , 0x00102020, 64 * 1024, 256, 32 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P10" , 0x00112020, 128 * 1024, 256, 32 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P20" , 0x00122020, 256 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P40" , 0x00132020, 512 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P80" , 0x00142020, 1 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P16" , 0x00152020, 2 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P32" , 0x00162020, 4 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"M25P64" , 0x00172020, 8 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
// Manufacturer: Windbond
{"W25X10" , 0x001130EF, 128 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"W25X20" , 0x001230EF, 256 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"W25X40" , 0x001330EF, 512 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"W25X80" , 0x001430EF, 1 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
// Manufacturer: Macronix
{"MX25L512" , 0x001020C2, 64 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"MX25L3205" , 0x001620C2, 4 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
{"MX25L6405" , 0x001720C2, 8 * 1024 * 1024, 256, 64 * 1024, AT26_BLOCK_ERASE_64K},
// Other
{"SST25VF512" , 0x000048BF, 64 * 1024, 256, 32 * 1024, AT26_BLOCK_ERASE_32K}
};
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Initializes an AT26 driver instance with the given SPI driver and chip
/// select value.
/// \param pAt26 Pointer to an AT26 driver instance.
/// \param pSpid Pointer to an SPI driver instance.
/// \param cs Chip select value to communicate with the serial flash.
//------------------------------------------------------------------------------
void AT26_Configure(At26 *pAt26, Spid *pSpid, unsigned char cs)
{
SpidCmd *pCommand;
SANITY_CHECK(pAt26);
SANITY_CHECK(pSpid);
SANITY_CHECK(cs < 4);
// Configure the SPI chip select for the serial flash
SPID_ConfigureCS(pSpid, cs, CSR);
// Initialize the AT26 fields
pAt26->pSpid = pSpid;
pAt26->pDesc = 0;
// Initialize the command structure
pCommand = &(pAt26->command);
pCommand->pCmd = (unsigned char *) pAt26->pCmdBuffer;
pCommand->callback = 0;
pCommand->pArgument = 0;
pCommand->spiCs = cs;
}
//------------------------------------------------------------------------------
/// Returns 1 if the serial flash driver is currently busy executing a command;
/// otherwise returns 0.
/// \param pAt26 Pointer to an At26 driver instance.
//------------------------------------------------------------------------------
unsigned char AT26_IsBusy(At26 *pAt26)
{
return SPID_IsBusy(pAt26->pSpid);
}
//------------------------------------------------------------------------------
/// Sends a command to the serial flash through the SPI. The command is made up
/// of two parts: the first is used to transmit the command byte and optionally,
/// address and dummy bytes. The second part is the data to send or receive.
/// This function does not block: it returns as soon as the transfer has been
/// started. An optional callback can be invoked to notify the end of transfer.
/// Return 0 if successful; otherwise, returns AT26_ERROR_BUSY if the AT26
/// driver is currently executing a command, or AT26_ERROR_SPI if the command
/// cannot be sent because of a SPI error.
/// \param pAt26 Pointer to an At26 driver instance.
/// \param cmd Command byte.
/// \param cmdSize Size of command (command byte + address bytes + dummy bytes).
/// \param pData Data buffer.
/// \param dataSize Number of bytes to send/receive.
/// \param address Address to transmit.
/// \param callback Optional user-provided callback to invoke at end of transfer.
/// \param pArgument Optional argument to the callback function.
//------------------------------------------------------------------------------
unsigned char AT26_SendCommand(
At26 *pAt26,
unsigned char cmd,
unsigned char cmdSize,
unsigned char *pData,
unsigned int dataSize,
unsigned int address,
SpidCallback callback,
void *pArgument)
{
SpidCmd *pCommand;
SANITY_CHECK(pAt26);
// Check if the SPI driver is available
if (AT26_IsBusy(pAt26)) {
return AT26_ERROR_BUSY;
}
// Store command and address in command buffer
pAt26->pCmdBuffer[0] = (cmd & 0x000000FF)
| ((address & 0x0000FF) << 24)
| ((address & 0x00FF00) << 8)
| ((address & 0xFF0000) >> 8);
// Update the SPI transfer descriptor
pCommand = &(pAt26->command);
pCommand->cmdSize = cmdSize;
pCommand->pData = pData;
pCommand->dataSize = dataSize;
pCommand->callback = callback;
pCommand->pArgument = pArgument;
// Start the SPI transfer
if (SPID_SendCommand(pAt26->pSpid, pCommand)) {
return AT26_ERROR_SPI;
}
return 0;
}
//------------------------------------------------------------------------------
/// Tries to detect a serial firmware flash device given its JEDEC identifier.
/// The JEDEC id can be retrieved by sending the correct command to the device.
/// Returns the corresponding AT26 descriptor if found; otherwise returns 0.
/// \param pAt26 Pointer to an AT26 driver instance.
/// \param jedecId JEDEC identifier of device.
//------------------------------------------------------------------------------
const At26Desc * AT26_FindDevice(At26 *pAt26, unsigned int jedecId)
{
unsigned int i = 0;
SANITY_CHECK(pAt26);
// Search if device is recognized
pAt26->pDesc = 0;
while ((i < NUMDATAFLASH) && !(pAt26->pDesc)) {
if (jedecId == at26Devices[i].jedecId) {
pAt26->pDesc = &(at26Devices[i]);
}
i++;
}
return pAt26->pDesc;
}
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