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Adding DIO for flash access

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logicog
2025-05-11 20:29:31 +02:00
parent 3a953bba47
commit 7493089c39
3 changed files with 28 additions and 63 deletions
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rtl837x_flash.c
+19 -63
View File
@@ -11,11 +11,18 @@
// DE62B415D3155829
// JEDEC-ID: ef 40 16
/*
void flash_init()
* Initializes the flash controller for programmed control
* The configuration options are not really understood, the SPI speed
* seems to be directly linked to the CPU frequency
* This configures uses fast double IO at 20.8 MHz when the CPU clock is at 20.8MHz
* and 62.5MHz when the CPU clock is configured at 125MHz
*/
void flash_init_dio()
{
// Configure fast read via divider = 4 and read-cmd being 0xbb (for mmio)
SFR_FLASH_CONFIG = 9;
// Configure fast DIO via divider/DIO/SIOconfig = 4 and read-cmd being 0xbb (for mmio)
SFR_FLASH_CONFIG = 9; // There may be a chip-select in here
SFR_FLASH_CONF_RCMD = 0xbb;
SFR_FLASH_CONF_DIV = 4;
@@ -36,8 +43,14 @@ void flash_init()
SFR_FLASH_CMD_R = 0xbb; // By default we read with Dual speed
SFR_FLASH_DUMMYCICLES = 4;
}
*/
/*
* Initializes the flash controller for programmed control
* The configuration options are not really understood, the SPI speed
* seems to be directly linked to the CPU frequency
* This configures uses fast single IO at 20.8 MHz when the CPU clock is at 20.8MHz
* and 62.5MHz when the CPU clock is configured at 125MHz
*/
void flash_init(void)
{
// Configure fast read via divider = 8 and read-cmd being 0xb (for mmio)
@@ -83,7 +96,6 @@ uint8_t flash_read_status(void)
void flash_read_uid(void)
{
while (flash_read_status() & 0x1);
print_string("\r\n -uid- \r\n");
// Set slow read mode for UID
SFR_FLASH_MODEB = 0x0;
@@ -123,57 +135,7 @@ void flash_read_uid(void)
void flash_read_jedecid(void)
{
while (flash_read_status() & 0x1);
print_string("\r\n -jedec- \r\n");
/*
// Set slow read mode for UID
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = 0x9f;
SFR_FLASH_DUMMYCICLES = 8;
// Transfer 3 bytes back
SFR_FLASH_TLEN = 0x3;
SFR_FLASH_EXEC_GO = 1;
while(SFR_FLASH_EXEC_BUSY);
print_byte(SFR_FLASH_DATA0);
print_byte(SFR_FLASH_DATA8);
print_byte(SFR_FLASH_DATA16);
print_byte(SFR_FLASH_DATA24);
// Reset slow read mode
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = 0xb;
SFR_FLASH_DUMMYCICLES = 8;
while (flash_read_status() & 0x1);
print_string("\r\n -jedec- b- \r\n");
// Set slow read mode for UID
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = 0x9f;
SFR_FLASH_DUMMYCICLES = 8;
// Transfer 3 bytes back
SFR_FLASH_TLEN = 0x13;
SFR_FLASH_EXEC_GO = 1;
while(SFR_FLASH_EXEC_BUSY);
print_byte(SFR_FLASH_DATA0);
print_byte(SFR_FLASH_DATA8);
print_byte(SFR_FLASH_DATA16);
print_byte(SFR_FLASH_DATA24);
// Reset slow read mode
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = 0xb;
SFR_FLASH_DUMMYCICLES = 8;
while (flash_read_status() & 0x1);
print_string("\r\n -jedec- c \r\n");
*/
// Set read mode for JEDEC ID
SFR_FLASH_MODEB = 0x0;
SFR_FLASH_CMD_R = 0x9f;
@@ -219,17 +181,14 @@ void flash_write_enable(void)
} while (!(status & 0x2));
}
/*
void flash_dump(uint32_t addr, uint8_t len)
void flash_dump_dio(uint32_t addr, uint8_t len)
{
short status;
print_string("\r\n -a- \r\n");
do {
status = flash_read_status();
print_short(status);
} while (status & 0x1);
// while (flash_read_status() & 0x1);
print_string("\r\n -b- \r\n");
// Set fast read mode
SFR_FLASH_MODEB = 0x18;
@@ -261,13 +220,11 @@ void flash_dump(uint32_t addr, uint8_t len)
len -= 4;
}
}
*/
void flash_read_security(uint32_t addr, uint8_t len)
{
while (flash_read_status() & 0x1);
print_string("\r\n -b- \r\n");
// Set slow read mode
SFR_FLASH_MODEB = 0x0;
@@ -304,7 +261,6 @@ void flash_read_security(uint32_t addr, uint8_t len)
void flash_dump(uint32_t addr, uint8_t len)
{
while (flash_read_status() & 0x1);
print_string("\r\n -b- \r\n");
// Set slow read mode
SFR_FLASH_MODEB = 0x0;
rtl837x_flash.h
+2
View File
@@ -4,9 +4,11 @@
#include <stdint.h>
uint8_t flash_read_status(void);
void flash_init(void);
void flash_init_dio(void);
void flash_read_uid(void);
void flash_write_enable(void);
void flash_dump(uint32_t addr, uint8_t len);
void flash_dump_dio(uint32_t addr, uint8_t len);
void flash_read_jedecid(void);
void flash_read_security(uint32_t addr, uint8_t len);
rtlplayground.c
+7
View File
@@ -798,6 +798,13 @@ void bootloader(void)
print_string("\r\nUNIQUE ID\n\n");
flash_read_uid();
}
// Switch to flash 62.5 MHz mode
if (cmd_compare(0, "flash") && cmd_words_b[1] > 0 && sbuf[cmd_words_b[1]] == 's') {
print_string("\r\nFLASH FAST MODE\n\n");
flash_init_fast();
print_string("\r\nNow dumping flash\n\n");
flash_dump_fast(0, 255);
}
}
print_string("\r\n> ");
}