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Added external spi flash driver. (#15419)

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Joy Lee 2022-02-12 04:26:16 +08:00 • committed by GitHub
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15
builddefs/common_features.mk
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@ -219,6 +219,21 @@ else
endif
endif
VALID_FLASH_DRIVER_TYPES := spi
FLASH_DRIVER ?= no
ifneq ($(strip $(FLASH_DRIVER)), no)
ifeq ($(filter $(FLASH_DRIVER),$(VALID_FLASH_DRIVER_TYPES)),)
$(error FLASH_DRIVER="$(FLASH_DRIVER)" is not a valid FLASH driver)
else
OPT_DEFS += -DFLASH_ENABLE
ifeq ($(strip $(FLASH_DRIVER)), spi)
OPT_DEFS += -DFLASH_DRIVER -DFLASH_SPI
COMMON_VPATH += $(DRIVER_PATH)/flash
SRC += flash_spi.c
endif
endif
endif
RGBLIGHT_ENABLE ?= no
VALID_RGBLIGHT_TYPES := WS2812 APA102 custom

24
docs/flash_driver.md Normal file
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# FLASH Driver Configuration :id=flash-driver-configuration
The FLASH driver can be swapped out depending on the needs of the keyboard, or whether extra hardware is present.
Driver | Description
-----------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
`FLASH_DRIVER = spi` | Supports writing to almost all NOR Flash chips. See the driver section below.
## SPI FLASH Driver Configuration :id=spi-flash-driver-configuration
Currently QMK supports almost all NOR Flash chips over SPI. As such, requires a working spi_master driver configuration. You can override the driver configuration via your config.h:
`config.h` override | Description | Default Value
-----------------------------------------------|--------------------------------------------------------------------------------------|-----------------
`#define EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN` | SPI Slave select pin in order to inform that the FLASH is currently being addressed | _none_
`#define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR` | Clock divisor used to divide the peripheral clock to derive the SPI frequency | `8`
`#define EXTERNAL_FLASH_PAGE_SIZE` | The Page size of the FLASH in bytes, as specified in the datasheet | `256`
`#define EXTERNAL_FLASH_SECTOR_SIZE` | The sector size of the FLASH in bytes, as specified in the datasheet | `(4 * 1024)`
`#define EXTERNAL_FLASH_BLOCK_SIZE` | The block size of the FLASH in bytes, as specified in the datasheet | `(64 * 1024)`
`#define EXTERNAL_FLASH_SIZE` | The total size of the FLASH in bytes, as specified in the datasheet | `(512 * 1024)`
`#define EXTERNAL_FLASH_ADDRESS_SIZE` | The Flash address size in bytes, as specified in datasheet | `3`
!> All the above default configurations are based on MX25L4006E NOR Flash.

372
drivers/flash/flash_spi.c Normal file
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/*
Copyright (C) 2021 Westberry Technology (ChangZhou) Corp., Ltd
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, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "util.h"
#include "wait.h"
#include "debug.h"
#include "timer.h"
#include "flash_spi.h"
#include "spi_master.h"
/*
The time-out time of spi flash transmission.
*/
#ifndef EXTERNAL_FLASH_SPI_TIMEOUT
# define EXTERNAL_FLASH_SPI_TIMEOUT 1000
#endif
/* ID comands */
#define FLASH_CMD_RDID 0x9F /* RDID (Read Identification) */
#define FLASH_CMD_RES 0xAB /* RES (Read Electronic ID) */
#define FLASH_CMD_REMS 0x90 /* REMS (Read Electronic & Device ID) */
/* register comands */
#define FLASH_CMD_WRSR 0x01 /* WRSR (Write Status register) */
#define FLASH_CMD_RDSR 0x05 /* RDSR (Read Status register) */
/* READ comands */
#define FLASH_CMD_READ 0x03 /* READ (1 x I/O) */
#define FLASH_CMD_FASTREAD 0x0B /* FAST READ (Fast read data) */
#define FLASH_CMD_DREAD 0x3B /* DREAD (1In/2 Out fast read) */
/* Program comands */
#define FLASH_CMD_WREN 0x06 /* WREN (Write Enable) */
#define FLASH_CMD_WRDI 0x04 /* WRDI (Write Disable) */
#define FLASH_CMD_PP 0x02 /* PP (page program) */
/* Erase comands */
#define FLASH_CMD_SE 0x20 /* SE (Sector Erase) */
#define FLASH_CMD_BE 0xD8 /* BE (Block Erase) */
#define FLASH_CMD_CE 0x60 /* CE (Chip Erase) hex code: 60 or C7 */
/* Mode setting comands */
#define FLASH_CMD_DP 0xB9 /* DP (Deep Power Down) */
#define FLASH_CMD_RDP 0xAB /* RDP (Release form Deep Power Down) */
/* Status register */
#define FLASH_FLAG_WIP 0x01 /* Write in progress bit */
#define FLASH_FLAG_WEL 0x02 /* Write enable latch bit */
// #define DEBUG_FLASH_SPI_OUTPUT
static bool spi_flash_start(void) { return spi_start(EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN, EXTERNAL_FLASH_SPI_LSBFIRST, EXTERNAL_FLASH_SPI_MODE, EXTERNAL_FLASH_SPI_CLOCK_DIVISOR); }
static flash_status_t spi_flash_wait_while_busy(void) {
uint32_t deadline = timer_read32() + EXTERNAL_FLASH_SPI_TIMEOUT;
flash_status_t response = FLASH_STATUS_SUCCESS;
uint8_t retval;
do {
bool res = spi_flash_start();
if (!res) {
dprint("Failed to start SPI! [spi flash wait while busy]\n");
return FLASH_STATUS_ERROR;
}
spi_write(FLASH_CMD_RDSR);
retval = (uint8_t)spi_read();
spi_stop();
if (timer_read32() >= deadline) {
response = FLASH_STATUS_TIMEOUT;
break;
}
} while (retval & FLASH_FLAG_WIP);
return response;
}
static flash_status_t spi_flash_write_enable(void) {
bool res = spi_flash_start();
if (!res) {
dprint("Failed to start SPI! [spi flash write enable]\n");
return FLASH_STATUS_ERROR;
}
spi_write(FLASH_CMD_WREN);
spi_stop();
return FLASH_STATUS_SUCCESS;
}
static flash_status_t spi_flash_write_disable(void) {
bool res = spi_flash_start();
if (!res) {
dprint("Failed to start SPI! [spi flash write disable]\n");
return FLASH_STATUS_ERROR;
}
spi_write(FLASH_CMD_WRDI);
spi_stop();
return FLASH_STATUS_SUCCESS;
}
/* This function is used for read transfer, write transfer and erase transfer. */
static flash_status_t spi_flash_transaction(uint8_t cmd, uint32_t addr, uint8_t *data, size_t len) {
flash_status_t response = FLASH_STATUS_SUCCESS;
uint8_t buffer[EXTERNAL_FLASH_ADDRESS_SIZE + 1];
buffer[0] = cmd;
for (int i = 0; i < EXTERNAL_FLASH_ADDRESS_SIZE; ++i) {
buffer[EXTERNAL_FLASH_ADDRESS_SIZE - i] = addr & 0xFF;
addr >>= 8;
}
bool res = spi_flash_start();
if (!res) {
dprint("Failed to start SPI! [spi flash transmit]\n");
return FLASH_STATUS_ERROR;
}
response = spi_transmit(buffer, sizeof(buffer));
if ((!response) && (data != NULL)) {
switch (cmd) {
case FLASH_CMD_READ:
response = spi_receive(data, len);
break;
case FLASH_CMD_PP:
response = spi_transmit(data, len);
break;
default:
response = FLASH_STATUS_ERROR;
break;
}
}
spi_stop();
return response;
}
void flash_init(void) { spi_init(); }
flash_status_t flash_erase_chip(void) {
flash_status_t response = FLASH_STATUS_SUCCESS;
/* Wait for the write-in-progress bit to be cleared. */
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash erase chip]\n");
return response;
}
/* Enable writes. */
response = spi_flash_write_enable();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to write-enable! [spi flash erase chip]\n");
return response;
}
/* Erase Chip. */
bool res = spi_flash_start();
if (!res) {
dprint("Failed to start SPI! [spi flash erase chip]\n");
return FLASH_STATUS_ERROR;
}
spi_write(FLASH_CMD_CE);
spi_stop();
/* Wait for the write-in-progress bit to be cleared.*/
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash erase chip]\n");
return response;
}
return response;
}
flash_status_t flash_erase_sector(uint32_t addr) {
flash_status_t response = FLASH_STATUS_SUCCESS;
/* Check that the address exceeds the limit. */
if ((addr + (EXTERNAL_FLASH_SECTOR_SIZE)) >= (EXTERNAL_FLASH_SIZE) || ((addr % (EXTERNAL_FLASH_SECTOR_SIZE)) != 0)) {
dprintf("Flash erase sector address over limit! [addr:0x%x]\n", (uint32_t)addr);
return FLASH_STATUS_ERROR;
}
/* Wait for the write-in-progress bit to be cleared. */
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash erase sector]\n");
return response;
}
/* Enable writes. */
response = spi_flash_write_enable();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to write-enable! [spi flash erase sector]\n");
return response;
}
/* Erase Sector. */
response = spi_flash_transaction(FLASH_CMD_SE, addr, NULL, 0);
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to erase sector! [spi flash erase sector]\n");
return response;
}
/* Wait for the write-in-progress bit to be cleared.*/
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash erase sector]\n");
return response;
}
return response;
}
flash_status_t flash_erase_block(uint32_t addr) {
flash_status_t response = FLASH_STATUS_SUCCESS;
/* Check that the address exceeds the limit. */
if ((addr + (EXTERNAL_FLASH_BLOCK_SIZE)) >= (EXTERNAL_FLASH_SIZE) || ((addr % (EXTERNAL_FLASH_BLOCK_SIZE)) != 0)) {
dprintf("Flash erase block address over limit! [addr:0x%x]\n", (uint32_t)addr);
return FLASH_STATUS_ERROR;
}
/* Wait for the write-in-progress bit to be cleared. */
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash erase block]\n");
return response;
}
/* Enable writes. */
response = spi_flash_write_enable();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to write-enable! [spi flash erase block]\n");
return response;
}
/* Erase Block. */
response = spi_flash_transaction(FLASH_CMD_BE, addr, NULL, 0);
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to erase block! [spi flash erase block]\n");
return response;
}
/* Wait for the write-in-progress bit to be cleared.*/
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash erase block]\n");
return response;
}
return response;
}
flash_status_t flash_read_block(uint32_t addr, void *buf, size_t len) {
flash_status_t response = FLASH_STATUS_SUCCESS;
uint8_t * read_buf = (uint8_t *)buf;
/* Wait for the write-in-progress bit to be cleared. */
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash read block]\n");
memset(read_buf, 0, len);
return response;
}
/* Perform read. */
response = spi_flash_transaction(FLASH_CMD_READ, addr, read_buf, len);
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to read block! [spi flash read block]\n");
memset(read_buf, 0, len);
return response;
}
#if defined(CONSOLE_ENABLE) && defined(DEBUG_FLASH_SPI_OUTPUT)
dprintf("[SPI FLASH R] 0x%08lX: ", addr);
for (size_t i = 0; i < len; ++i) {
dprintf(" %02X", (int)(((uint8_t *)read_buf)[i]));
}
dprintf("\n");
#endif // DEBUG_FLASH_SPI_OUTPUT
return response;
}
flash_status_t flash_write_block(uint32_t addr, const void *buf, size_t len) {
flash_status_t response = FLASH_STATUS_SUCCESS;
uint8_t * write_buf = (uint8_t *)buf;
while (len > 0) {
uint32_t page_offset = addr % EXTERNAL_FLASH_PAGE_SIZE;
size_t write_length = EXTERNAL_FLASH_PAGE_SIZE - page_offset;
if (write_length > len) {
write_length = len;
}
/* Wait for the write-in-progress bit to be cleared. */
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash write block]\n");
return response;
}
/* Enable writes. */
response = spi_flash_write_enable();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to write-enable! [spi flash write block]\n");
return response;
}
#if defined(CONSOLE_ENABLE) && defined(DEBUG_FLASH_SPI_OUTPUT)
dprintf("[SPI FLASH W] 0x%08lX: ", addr);
for (size_t i = 0; i < write_length; i++) {
dprintf(" %02X", (int)(uint8_t)(write_buf[i]));
}
dprintf("\n");
#endif // DEBUG_FLASH_SPI_OUTPUT
/* Perform the write. */
response = spi_flash_transaction(FLASH_CMD_PP, addr, write_buf, write_length);
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to write block! [spi flash write block]\n");
return response;
}
write_buf += write_length;
addr += write_length;
len -= write_length;
}
/* Wait for the write-in-progress bit to be cleared. */
response = spi_flash_wait_while_busy();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to check WIP flag! [spi flash write block]\n");
return response;
}
/* Disable writes. */
response = spi_flash_write_disable();
if (response != FLASH_STATUS_SUCCESS) {
dprint("Failed to write-disable! [spi flash write block]\n");
return response;
}
return response;
}

136
drivers/flash/flash_spi.h Normal file
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/*
Copyright (C) 2021 Westberry Technology (ChangZhou) Corp., Ltd
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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
/* All the following default configurations are based on MX25L4006E Nor FLASH. */
/*
The slave select pin of the FLASH.
This needs to be a normal GPIO pin_t value, such as B14.
*/
#ifndef EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN
# error "No chip select pin defined -- missing EXTERNAL_FLASH_SPI_SLAVE_SELECT_PIN"
#endif
/*
The clock divisor for SPI to ensure that the MCU is within the
specifications of the FLASH chip. Generally this will be PCLK divided by
the intended divisor -- check your clock settings and the datasheet of
your FLASH.
*/
#ifndef EXTERNAL_FLASH_SPI_CLOCK_DIVISOR
# ifdef __AVR__
# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 4
# else
# define EXTERNAL_FLASH_SPI_CLOCK_DIVISOR 8
# endif
#endif
/*
The SPI mode to communicate with the FLASH.
*/
#ifndef EXTERNAL_FLASH_SPI_MODE
# define EXTERNAL_FLASH_SPI_MODE 0
#endif
/*
Whether or not the SPI communication between the MCU and FLASH should be
LSB-first.
*/
#ifndef EXTERNAL_FLASH_SPI_LSBFIRST
# define EXTERNAL_FLASH_SPI_LSBFIRST false
#endif
/*
The Flash address size in bytes, as specified in datasheet.
*/
#ifndef EXTERNAL_FLASH_ADDRESS_SIZE
# define EXTERNAL_FLASH_ADDRESS_SIZE 3
#endif
/*
The page size of the FLASH in bytes, as specified in the datasheet.
*/
#ifndef EXTERNAL_FLASH_PAGE_SIZE
# define EXTERNAL_FLASH_PAGE_SIZE 256
#endif
/*
The sector size of the FLASH in bytes, as specified in the datasheet.
*/
#ifndef EXTERNAL_FLASH_SECTOR_SIZE
# define EXTERNAL_FLASH_SECTOR_SIZE (4 * 1024)
#endif
/*
The block size of the FLASH in bytes, as specified in the datasheet.
*/
#ifndef EXTERNAL_FLASH_BLOCK_SIZE
# define EXTERNAL_FLASH_BLOCK_SIZE (64 * 1024)
#endif
/*
The total size of the FLASH in bytes, as specified in the datasheet.
*/
#ifndef EXTERNAL_FLASH_SIZE
# define EXTERNAL_FLASH_SIZE (512 * 1024)
#endif
/*
The block count of the FLASH, calculated by total FLASH size and block size.
*/
#define EXTERNAL_FLASH_BLOCK_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_BLOCK_SIZE))
/*
The sector count of the FLASH, calculated by total FLASH size and sector size.
*/
#define EXTERNAL_FLASH_SECTOR_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_SECTOR_SIZE))
/*
The page count of the FLASH, calculated by total FLASH size and page size.
*/
#define EXTERNAL_FLASH_PAGE_COUNT ((EXTERNAL_FLASH_SIZE) / (EXTERNAL_FLASH_PAGE_SIZE))
typedef int16_t flash_status_t;
#define FLASH_STATUS_SUCCESS (0)
#define FLASH_STATUS_ERROR (-1)
#define FLASH_STATUS_TIMEOUT (-2)
#define FLASH_STATUS_BAD_ADDRESS (-3)
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
void flash_init(void);
flash_status_t flash_erase_chip(void);
flash_status_t flash_erase_block(uint32_t addr);
flash_status_t flash_erase_sector(uint32_t addr);
flash_status_t flash_read_block(uint32_t addr, void *buf, size_t len);
flash_status_t flash_write_block(uint32_t addr, const void *buf, size_t len);
#ifdef __cplusplus
}
#endif