static int alt_epcs_flash_query(alt_flash_epcs_dev* flash)
{
int ret_code = 0;
/* Decide if an epcs flash device is attached.
*
* ret_code = -ENODEV = No device found!
*/
/* It may be necessary to unlock or lock sectors,
* reset the device, or whatever, to ensure that
* it's in a known working state.
*/
/* Send the RES command sequence */
flash->silicon_id =
epcs_read_electronic_signature(flash->register_base);
/* Fill in all device-specific parameters. */
if (flash->silicon_id == 0x16) /* EPCS64 */
{
flash->dev.region_info[0].region_size = 64 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 128;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x14) /* EPCS16 */
{
flash->dev.region_info[0].region_size = 16 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 32;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x13) /* EPCS8 */
{
flash->dev.region_info[0].region_size = 8 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 16;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x12) /* EPCS4 */
{
flash->dev.region_info[0].region_size = 4 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 8;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x10) /* EPCS1 */
{
flash->dev.region_info[0].region_size = 1 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 4;
flash->dev.region_info[0].block_size = 32768;
}
else
{
/*
* Read electronic signature doesn't work for the EPCS128; try
* the "Read Device ID" command" before giving up.
*/
flash->silicon_id = epcs_read_device_id(flash->register_base);
if(flash->silicon_id == 0x18) /* EPCS128 */
{
flash->dev.region_info[0].region_size = 128 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 64;
flash->dev.region_info[0].block_size = 262144;
}
else
{
ret_code = -ENODEV; /* No known device found! */
}
}
flash->size_in_bytes = flash->dev.region_info[0].region_size;
flash->dev.number_of_regions = 1;
flash->dev.region_info[0].offset = 0;
flash->page_size = 256;
/* Consider clearing all BP bits here. */
return ret_code;
}
static int alt_epcs_flash_query(alt_flash_epcs_dev* flash)
{
int ret_code = 0;
/* Decide if an epcs flash device is attached.
*
* ret_code = -ENODEV = No device found!
*/
/* It may be necessary to unlock or lock sectors,
* reset the device, or whatever, to ensure that
* it's in a known working state.
*/
/* Disable 4-bytes address mode. */
flash->four_bytes_mode = 0;
/* Send the RES command sequence */
flash->silicon_id =
epcs_read_electronic_signature(flash->register_base);
/* Fill in all device-specific parameters. */
if (flash->silicon_id == 0x16) /* EPCS64 */
{
flash->dev.region_info[0].region_size = 64 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 128;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x14) /* EPCS16 */
{
flash->dev.region_info[0].region_size = 16 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 32;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x13) /* EPCS8 */
{
flash->dev.region_info[0].region_size = 8 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 16;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x12) /* EPCS4 */
{
flash->dev.region_info[0].region_size = 4 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 8;
flash->dev.region_info[0].block_size = 65536;
}
else if (flash->silicon_id == 0x10) /* EPCS1 */
{
flash->dev.region_info[0].region_size = 1 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 4;
flash->dev.region_info[0].block_size = 32768;
}
else
{
/*
* Read electronic signature doesn't work for newer devices; try
* the "Read Device ID" command" before giving up.
*/
flash->silicon_id = epcs_read_device_id(flash->register_base);
/*
* Last byte is the density ID. Note the difference between
* EPCS128 and EPCQ128 -- arranged differently, though the
* least significant byte of each is '0x18'.
*/
if((flash->silicon_id & 0xFFFFFF) == 0x20BA15) /* EPCQ16 */
{
flash->dev.region_info[0].region_size = 16 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 32; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
}
else if((flash->silicon_id & 0xFFFFFF) == 0x20BA16) /* EPCQ32 */
{
flash->dev.region_info[0].region_size = 32 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 64; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
}
else if((flash->silicon_id & 0xFFFFFF) == 0x20BA17) /* EPCQ64 */
{
flash->dev.region_info[0].region_size = 64 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 128; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
}
else if((flash->silicon_id & 0xFFFFFF) == 0x20BA18) /* EPCQ128 */
{
flash->dev.region_info[0].region_size = 128 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 256; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
}
else if((flash->silicon_id & 0xFF) == 0x18) /* EPCS128 */
{
flash->dev.region_info[0].region_size = 128 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 64;
flash->dev.region_info[0].block_size = 262144;
}
else if((flash->silicon_id & 0xFF ) == 0x19) /* EPCQ256 */
{
flash->dev.region_info[0].region_size = 256 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 512; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
/* Enable 4-bytes address mode if the device density is greater than 256Mbit.
* Last byte of device ID is density ID.
*
* The whole 4-bytes thing extends commands that send a memory address to
* the chip (read, write, erase) from 3 bytes to 4. The 4-byte address mode
* must first be programmed into the device, though. To complicate things,
* other Altera IP expects the chip to be in 3 byte address mode when they
* start using it. To be nice, we'll place the device into 4-byte address mode
* when we need to, and take it back out when we're done.
*/
flash->four_bytes_mode = 1;
}
else if((flash->silicon_id & 0xFF ) == 0x20) /* EPCQ512 */
{
flash->dev.region_info[0].region_size = 512 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 1024; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
/* Enable 4-bytes address mode if the device density is greater than 256Mbit. */
flash->four_bytes_mode = 1;
}
else if((flash->silicon_id & 0xFF ) == 0x21) /* EPCQ1024 */
{
flash->dev.region_info[0].region_size = 1024 * 1024 * 1024 / 8;
flash->dev.region_info[0].number_of_blocks = 2048; /* number of sectors */
flash->dev.region_info[0].block_size = 65536; /* sector size */
/* Enable 4-bytes address mode if the device density is greater than 256Mbit. */
flash->four_bytes_mode = 1;
}
else
{
ret_code = -ENODEV; /* No known device found! */
}
}
flash->size_in_bytes = flash->dev.region_info[0].region_size;
flash->dev.number_of_regions = 1;
flash->dev.region_info[0].offset = 0;
flash->page_size = 256;
/* Consider clearing all BP bits here. */
return ret_code;
}
