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Update flash device reset to conform to SFDP standard

pull/11894/head
Matthew Macovsky 2019-08-30 02:19:03 -07:00 committed by adbridge
parent 9bd8c17cdf
commit 814fe6d5b6
2 changed files with 48 additions and 54 deletions
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97
components/storage/blockdevice/COMPONENT_QSPIF/QSPIFBlockDevice.cpp
View File

@ -73,6 +73,11 @@ using namespace mbed;
#define QSPIF_BASIC_PARAM_ERASE_TYPE_4_SIZE_BYTE 34
#define QSPIF_BASIC_PARAM_4K_ERASE_TYPE_BYTE 1
#define QSPIF_BASIC_PARAM_TABLE_SOFT_RESET_BYTE 61
#define SOFT_RESET_RESET_INST_BITMASK 0b001000
#define SOFT_RESET_ENABLE_AND_RESET_INST_BITMASK 0b010000
// Erase Types Per Region BitMask
#define ERASE_BITMASK_TYPE4 0x08
#define ERASE_BITMASK_TYPE1 0x01
@ -190,15 +195,6 @@ int QSPIFBlockDevice::init()
goto exit_point;
}
// Soft Reset
if (-1 == _reset_flash_mem()) {
tr_error("Init - Unable to initialize flash memory, tests failed");
status = QSPIF_BD_ERROR_DEVICE_ERROR;
goto exit_point;
} else {
tr_debug("Initialize flash memory OK");
}
/* Read Manufacturer ID (1byte), and Device ID (2bytes)*/
qspi_status = _qspi_send_general_command(QSPIF_RDID, QSPI_NO_ADDRESS_COMMAND, NULL, 0, (char *)vendor_device_ids,
data_length);
@ -722,6 +718,11 @@ int QSPIFBlockDevice::_sfdp_parse_basic_param_table(uint32_t basic_table_addr, s
// Set Page Size (QSPI write must be done on Page limits)
_page_size_bytes = _sfdp_detect_page_size(param_table, basic_table_size);
if (_sfdp_detect_reset_protocol_and_reset(param_table) != QSPIF_BD_ERROR_OK) {
tr_error("Init - Detecting reset protocol/resetting failed");
return -1;
}
// Detect and Set Erase Types
bool shouldSetQuadEnable = false;
bool is_qpi_mode = false;
@ -1032,6 +1033,41 @@ int QSPIFBlockDevice::_sfdp_detect_best_bus_read_mode(uint8_t *basic_param_table
return 0;
}
int QSPIFBlockDevice::_sfdp_detect_reset_protocol_and_reset(uint8_t *basic_param_table_ptr)
{
int status = QSPIF_BD_ERROR_OK;
uint8_t examined_byte = basic_param_table_ptr[QSPIF_BASIC_PARAM_TABLE_SOFT_RESET_BYTE];
// Ignore bit indicating need to exit 0-4-4 mode - should not enter 0-4-4 mode from QSPIFBlockDevice
if (examined_byte & SOFT_RESET_RESET_INST_BITMASK) {
// Issue instruction 0xF0 to reset the device
qspi_status_t qspi_status = _qspi_send_general_command(0xF0, QSPI_NO_ADDRESS_COMMAND, // Send reset instruction
NULL, 0, NULL, 0);
status = (qspi_status == QSPI_STATUS_OK) ? QSPIF_BD_ERROR_OK : QSPIF_BD_ERROR_PARSING_FAILED;
} else if (examined_byte & SOFT_RESET_ENABLE_AND_RESET_INST_BITMASK) {
// Issue instruction 66h to enable resets on the device
// Then issue instruction 99h to reset the device
qspi_status_t qspi_status = _qspi_send_general_command(0x66, QSPI_NO_ADDRESS_COMMAND, // Send reset enable instruction
NULL, 0, NULL, 0);
if (qspi_status == QSPI_STATUS_OK) {
qspi_status = _qspi_send_general_command(0x99, QSPI_NO_ADDRESS_COMMAND, // Send reset instruction
NULL, 0, NULL, 0);
}
status = (qspi_status == QSPI_STATUS_OK) ? QSPIF_BD_ERROR_OK : QSPIF_BD_ERROR_PARSING_FAILED;
} else {
// Soft reset either is not supported or requires direct control over data lines
status = QSPIF_BD_ERROR_PARSING_FAILED;
}
if (status == QSPIF_BD_ERROR_OK){
if (false == _is_mem_ready()) {
tr_error("Device not ready, reset failed");
status = QSPIF_BD_ERROR_READY_FAILED;
}
}
return status;
}
int QSPIFBlockDevice::_sfdp_parse_sector_map_table(uint32_t sector_map_table_addr, size_t sector_map_table_size)
{
@ -1092,49 +1128,6 @@ int QSPIFBlockDevice::_sfdp_parse_sector_map_table(uint32_t sector_map_table_add
return 0;
}
int QSPIFBlockDevice::_reset_flash_mem()
{
// Perform Soft Reset of the Device prior to initialization
int status = 0;
uint8_t status_value = 0;
tr_debug("_reset_flash_mem:");
//Read the Status Register from device
if (QSPI_STATUS_OK == _qspi_send_general_command(QSPIF_INST_RSR1, QSPI_NO_ADDRESS_COMMAND, NULL, 0, (char *) &status_value,
1)) { // store received values in status_value
tr_debug("Reading Status Register Success: value = 0x%x", status_value);
} else {
tr_error("Reading Status Register failed: value = 0x%x", status_value);
status = -1;
}
if (0 == status) {
//Send Reset Enable
if (QSPI_STATUS_OK == _qspi_send_general_command(QSPIF_RSTEN, QSPI_NO_ADDRESS_COMMAND, NULL, 0, NULL,
0)) { // store received values in status_value
tr_debug("Sending RSTEN Success");
} else {
tr_error("Sending RSTEN failed");
status = -1;
}
if (0 == status) {
//Send Reset
if (QSPI_STATUS_OK == _qspi_send_general_command(QSPIF_RST, QSPI_NO_ADDRESS_COMMAND, NULL, 0, NULL,
0)) { // store received values in status_value
tr_debug("Sending RST Success");
} else {
tr_error("Sending RST failed");
status = -1;
}
_is_mem_ready();
}
}
return status;
}
int QSPIFBlockDevice::_set_write_enable()
{
// Check Status Register Busy Bit to Verify the Device isn't Busy

5
components/storage/blockdevice/COMPONENT_QSPIF/QSPIFBlockDevice.h
View File

@ -265,8 +265,6 @@ private:
/*********************************/
/* Flash Configuration Functions */
/*********************************/
// Soft Reset Flash Memory
int _reset_flash_mem();
// Configure Write Enable in Status Register
int _set_write_enable();
@ -287,6 +285,9 @@ private:
// Parse and read information required by Regions Secotr Map
int _sfdp_parse_sector_map_table(uint32_t sector_map_table_addr, size_t sector_map_table_size);
// Detect the soft reset protocol and reset - returns error if soft reset is not supported
int _sfdp_detect_reset_protocol_and_reset(uint8_t *basic_param_table_ptr);
// Detect fastest read Bus mode supported by device
int _sfdp_detect_best_bus_read_mode(uint8_t *basic_param_table_ptr, int basic_param_table_size, bool &set_quad_enable,
bool &is_qpi_mode, mbed::qspi_inst_t &read_inst);