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-rw-r--r--common_features.mk51
-rw-r--r--docs/_summary.md1
-rw-r--r--docs/eeprom_driver.md50
-rw-r--r--docs/hardware_drivers.md4
-rw-r--r--drivers/eeprom/eeprom_custom.c-template46
-rw-r--r--drivers/eeprom/eeprom_driver.c73
-rw-r--r--drivers/eeprom/eeprom_driver.h22
-rw-r--r--drivers/eeprom/eeprom_i2c.c120
-rw-r--r--drivers/eeprom/eeprom_i2c.h115
-rw-r--r--drivers/eeprom/eeprom_transient.c52
-rw-r--r--drivers/eeprom/eeprom_transient.h25
-rw-r--r--quantum/audio/audio_arm.c2
-rw-r--r--quantum/rgblight.c8
-rw-r--r--tmk_core/common.mk30
-rw-r--r--tmk_core/common/arm_atsam/eeprom.c13
-rw-r--r--tmk_core/common/chibios/eeprom_stm32.c6
-rw-r--r--tmk_core/common/chibios/eeprom_teensy.c25
-rw-r--r--tmk_core/common/eeconfig.c10
-rw-r--r--tmk_core/common/eeprom.h9
-rw-r--r--tmk_core/common/test/eeprom.c6
20 files changed, 616 insertions, 52 deletions
diff --git a/common_features.mk b/common_features.mk
index 6c3646db94..900b27c46c 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -102,6 +102,57 @@ ifeq ($(strip $(UNICODE_COMMON)), yes)
SRC += $(QUANTUM_DIR)/process_keycode/process_unicode_common.c
endif
+VALID_EEPROM_DRIVER_TYPES := vendor custom transient i2c
+EEPROM_DRIVER ?= vendor
+ifeq ($(filter $(EEPROM_DRIVER),$(VALID_EEPROM_DRIVER_TYPES)),)
+ $(error EEPROM_DRIVER="$(EEPROM_DRIVER)" is not a valid EEPROM driver)
+else
+ OPT_DEFS += -DEEPROM_ENABLE
+ ifeq ($(strip $(EEPROM_DRIVER)), custom)
+ OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_CUSTOM
+ COMMON_VPATH += $(DRIVER_PATH)/eeprom
+ SRC += eeprom_driver.c
+ else ifeq ($(strip $(EEPROM_DRIVER)), i2c)
+ OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_I2C
+ COMMON_VPATH += $(DRIVER_PATH)/eeprom
+ QUANTUM_LIB_SRC += i2c_master.c
+ SRC += eeprom_driver.c eeprom_i2c.c
+ else ifeq ($(strip $(EEPROM_DRIVER)), transient)
+ OPT_DEFS += -DEEPROM_DRIVER -DEEPROM_TRANSIENT
+ COMMON_VPATH += $(DRIVER_PATH)/eeprom
+ SRC += eeprom_driver.c eeprom_transient.c
+ else ifeq ($(strip $(EEPROM_DRIVER)), vendor)
+ OPT_DEFS += -DEEPROM_VENDOR
+ ifeq ($(PLATFORM),AVR)
+ # Automatically provided by avr-libc, nothing required
+ else ifeq ($(PLATFORM),CHIBIOS)
+ ifeq ($(MCU_SERIES), STM32F3xx)
+ SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
+ SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
+ OPT_DEFS += -DEEPROM_EMU_STM32F303xC
+ OPT_DEFS += -DSTM32_EEPROM_ENABLE
+ else ifeq ($(MCU_SERIES), STM32F1xx)
+ SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
+ SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
+ OPT_DEFS += -DEEPROM_EMU_STM32F103xB
+ OPT_DEFS += -DSTM32_EEPROM_ENABLE
+ else ifeq ($(MCU_SERIES)_$(MCU_LDSCRIPT), STM32F0xx_STM32F072xB)
+ SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
+ SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
+ OPT_DEFS += -DEEPROM_EMU_STM32F072xB
+ OPT_DEFS += -DSTM32_EEPROM_ENABLE
+ else
+ # This will effectively work the same as "transient" if not supported by the chip
+ SRC += $(PLATFORM_COMMON_DIR)/eeprom_teensy.c
+ endif
+ else ifeq ($(PLATFORM),ARM_ATSAM)
+ SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
+ else ifeq ($(PLATFORM),TEST)
+ SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
+ endif
+ endif
+endif
+
ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
POST_CONFIG_H += $(QUANTUM_DIR)/rgblight_post_config.h
OPT_DEFS += -DRGBLIGHT_ENABLE
diff --git a/docs/_summary.md b/docs/_summary.md
index de81481382..08ccdca220 100644
--- a/docs/_summary.md
+++ b/docs/_summary.md
@@ -104,6 +104,7 @@
* [ADC Driver](adc_driver.md)
* [I2C Driver](i2c_driver.md)
* [WS2812 Driver](ws2812_driver.md)
+ * [EEPROM Driver](eeprom_driver.md)
* [GPIO Controls](internals_gpio_control.md)
* [Custom Matrix](custom_matrix.md)
* [Proton C Conversion](proton_c_conversion.md)
diff --git a/docs/eeprom_driver.md b/docs/eeprom_driver.md
new file mode 100644
index 0000000000..dd12d8ec7b
--- /dev/null
+++ b/docs/eeprom_driver.md
@@ -0,0 +1,50 @@
+# EEPROM Driver Configuration
+
+The EEPROM driver can be swapped out depending on the needs of the keyboard, or whether extra hardware is present.
+
+Driver | Description
+--------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+`EEPROM_DRIVER = vendor` | Uses the on-chip driver provided by the chip manufacturer. For AVR, this is provided by avr-libc. This is supported on ARM for a subset of chips -- STM32F3xx, STM32F1xx, and STM32F072xB will be emulated by writing to flash. Other chips will generally act as "transient" below.
+`EEPROM_DRIVER = i2c` | Supports writing to I2C-based 24xx EEPROM chips. See the driver section below.
+`EEPROM_DRIVER = transient` | Fake EEPROM driver -- supports reading/writing to RAM, and will be discarded when power is lost.
+
+## Vendor Driver Configuration
+
+No configurable options are available.
+
+## I2C Driver Configuration
+
+Currently QMK supports 24xx-series chips over I2C. As such, requires a working i2c_master driver configuration. You can override the driver configuration via your config.h:
+
+`config.h` override | Description | Default Value
+------------------------------------------- | ----------------------------------------------------------------------------------- | ------------------------------------
+`#define EXTERNAL_EEPROM_I2C_BASE_ADDRESS` | Base I2C address for the EEPROM -- shifted left by 1 as per i2c_master requirements | 0b10100000
+`#define EXTERNAL_EEPROM_I2C_ADDRESS(addr)` | Calculated I2C address for the EEPROM | `(EXTERNAL_EEPROM_I2C_BASE_ADDRESS)`
+`#define EXTERNAL_EEPROM_BYTE_COUNT` | Total size of the EEPROM in bytes | 8192
+`#define EXTERNAL_EEPROM_PAGE_SIZE` | Page size of the EEPROM in bytes, as specified in the datasheet | 32
+`#define EXTERNAL_EEPROM_ADDRESS_SIZE` | The number of bytes to transmit for the memory location within the EEPROM | 2
+`#define EXTERNAL_EEPROM_WRITE_TIME` | Write cycle time of the EEPROM, as specified in the datasheet | 5
+
+Default values and extended descriptions can be found in `drivers/eeprom/eeprom_i2c.h`.
+
+Alternatively, there are pre-defined hardware configurations for available chips/modules:
+
+Module | Equivalent `#define` | Source
+-----------------|---------------------------------|------------------------------------------
+CAT24C512 EEPROM | `#define EEPROM_I2C_CAT24C512` | <https://www.sparkfun.com/products/14764>
+RM24C512C EEPROM | `#define EEPROM_I2C_RM24C512C` | <https://www.sparkfun.com/products/14764>
+24LC128 EEPROM | `#define EEPROM_I2C_24LC128` | <https://www.microchip.com/wwwproducts/en/24LC128>
+24LC256 EEPROM | `#define EEPROM_I2C_24LC256` | <https://www.sparkfun.com/products/525>
+MB85RC256V FRAM | `#define EEPROM_I2C_MB85RC256V` | <https://www.adafruit.com/product/1895>
+
+?> If you find that the EEPROM is not cooperating, ensure you've correctly shifted up your EEPROM address by 1. For example, the datasheet might state the address as `0b01010000` -- the correct value of `EXTERNAL_EEPROM_I2C_BASE_ADDRESS` needs to be `0b10100000`.
+
+## Transient Driver configuration
+
+The only configurable item for the transient EEPROM driver is its size:
+
+`config.h` override | Description | Default Value
+------------------------------- | ----------------------------------------- | -------------
+`#define TRANSIENT_EEPROM_SIZE` | Total size of the EEPROM storage in bytes | 64
+
+Default values and extended descriptions can be found in `drivers/eeprom/eeprom_transient.h`.
diff --git a/docs/hardware_drivers.md b/docs/hardware_drivers.md
index 1651877957..7e89c0d2b9 100644
--- a/docs/hardware_drivers.md
+++ b/docs/hardware_drivers.md
@@ -33,3 +33,7 @@ Support for up to 2 drivers. Each driver impliments 2 charlieplex matrices to in
## IS31FL3733
Support for up to a single driver with room for expansion. Each driver can control 192 individual LEDs or 64 RGB LEDs. For more information on how to setup the driver see the [RGB Matrix](feature_rgb_matrix.md) page.
+
+## 24xx series external I2C EEPROM
+
+Support for an external I2C-based EEPROM instead of using the on-chip EEPROM. For more information on how to setup the driver see the [EEPROM Driver](eeprom_driver.md) page.
diff --git a/drivers/eeprom/eeprom_custom.c-template b/drivers/eeprom/eeprom_custom.c-template
new file mode 100644
index 0000000000..5f915f7fab
--- /dev/null
+++ b/drivers/eeprom/eeprom_custom.c-template
@@ -0,0 +1,46 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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 <stdint.h>
+#include <string.h>
+
+#include "eeprom_driver.h"
+
+void eeprom_driver_init(void) {
+ /* Any initialisation code */
+ }
+
+void eeprom_driver_erase(void) {
+ /* Wipe out the EEPROM, setting values to zero */
+}
+
+void eeprom_read_block(void *buf, const void *addr, size_t len) {
+ /*
+ Read a block of data:
+ buf: target buffer
+ addr: 0-based offset within the EEPROM
+ len: length to read
+ */
+}
+
+void eeprom_write_block(const void *buf, void *addr, size_t len) {
+ /*
+ Write a block of data:
+ buf: target buffer
+ addr: 0-based offset within the EEPROM
+ len: length to write
+ */
+}
diff --git a/drivers/eeprom/eeprom_driver.c b/drivers/eeprom/eeprom_driver.c
new file mode 100644
index 0000000000..3835e5e9d0
--- /dev/null
+++ b/drivers/eeprom/eeprom_driver.c
@@ -0,0 +1,73 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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 <stdint.h>
+#include <string.h>
+
+#include "eeprom_driver.h"
+
+uint8_t eeprom_read_byte(const uint8_t *addr) {
+ uint8_t ret;
+ eeprom_read_block(&ret, addr, 1);
+ return ret;
+}
+
+uint16_t eeprom_read_word(const uint16_t *addr) {
+ uint16_t ret;
+ eeprom_read_block(&ret, addr, 2);
+ return ret;
+}
+
+uint32_t eeprom_read_dword(const uint32_t *addr) {
+ uint32_t ret;
+ eeprom_read_block(&ret, addr, 4);
+ return ret;
+}
+
+void eeprom_write_byte(uint8_t *addr, uint8_t value) { eeprom_write_block(&value, addr, 1); }
+
+void eeprom_write_word(uint16_t *addr, uint16_t value) { eeprom_write_block(&value, addr, 2); }
+
+void eeprom_write_dword(uint32_t *addr, uint32_t value) { eeprom_write_block(&value, addr, 4); }
+
+void eeprom_update_block(const void *buf, void *addr, size_t len) {
+ uint8_t read_buf[len];
+ eeprom_read_block(read_buf, addr, len);
+ if (memcmp(buf, read_buf, len) != 0) {
+ eeprom_write_block(buf, addr, len);
+ }
+}
+
+void eeprom_update_byte(uint8_t *addr, uint8_t value) {
+ uint8_t orig = eeprom_read_byte(addr);
+ if (orig != value) {
+ eeprom_write_byte(addr, value);
+ }
+}
+
+void eeprom_update_word(uint16_t *addr, uint16_t value) {
+ uint16_t orig = eeprom_read_word(addr);
+ if (orig != value) {
+ eeprom_write_word(addr, value);
+ }
+}
+
+void eeprom_update_dword(uint32_t *addr, uint32_t value) {
+ uint32_t orig = eeprom_read_dword(addr);
+ if (orig != value) {
+ eeprom_write_dword(addr, value);
+ }
+}
diff --git a/drivers/eeprom/eeprom_driver.h b/drivers/eeprom/eeprom_driver.h
new file mode 100644
index 0000000000..74592bc8f0
--- /dev/null
+++ b/drivers/eeprom/eeprom_driver.h
@@ -0,0 +1,22 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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
+
+#include "eeprom.h"
+
+void eeprom_driver_init(void);
+void eeprom_driver_erase(void);
diff --git a/drivers/eeprom/eeprom_i2c.c b/drivers/eeprom/eeprom_i2c.c
new file mode 100644
index 0000000000..03dbc5e516
--- /dev/null
+++ b/drivers/eeprom/eeprom_i2c.c
@@ -0,0 +1,120 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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 <stdint.h>
+#include <string.h>
+
+/*
+ Note that the implementations of eeprom_XXXX_YYYY on AVR are normally
+ provided by avr-libc. The same functions are reimplemented below and are
+ rerouted to the external i2c equivalent.
+
+ Seemingly, as this is compiled from within QMK, the object file generated
+ during the build overrides the avr-libc implementation during the linking
+ stage.
+
+ On other platforms such as ARM, there are no provided implementations, so
+ there is nothing to override during linkage.
+*/
+
+#include "wait.h"
+#include "i2c_master.h"
+#include "eeprom.h"
+#include "eeprom_i2c.h"
+
+// #define DEBUG_EEPROM_OUTPUT
+
+#ifdef DEBUG_EEPROM_OUTPUT
+# include "print.h"
+#endif // DEBUG_EEPROM_OUTPUT
+
+static inline void init_i2c_if_required(void) {
+ static int done = 0;
+ if (!done) {
+ i2c_init();
+ done = 1;
+ }
+}
+
+static inline void fill_target_address(uint8_t *buffer, const void *addr) {
+ intptr_t p = (intptr_t)addr;
+ for (int i = 0; i < EXTERNAL_EEPROM_ADDRESS_SIZE; ++i) {
+ buffer[EXTERNAL_EEPROM_ADDRESS_SIZE - 1 - i] = p & 0xFF;
+ p >>= 8;
+ }
+}
+
+void eeprom_driver_init(void) {}
+
+void eeprom_driver_erase(void) {
+ uint8_t buf[EXTERNAL_EEPROM_PAGE_SIZE];
+ memset(buf, 0x00, EXTERNAL_EEPROM_PAGE_SIZE);
+ for (intptr_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
+ eeprom_write_block(buf, (void *)addr, EXTERNAL_EEPROM_PAGE_SIZE);
+ }
+}
+
+void eeprom_read_block(void *buf, const void *addr, size_t len) {
+ uint8_t complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE];
+ fill_target_address(complete_packet, addr);
+
+ init_i2c_if_required();
+ i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE, 100);
+ i2c_receive(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), buf, len, 100);
+
+#ifdef DEBUG_EEPROM_OUTPUT
+ dprintf("[EEPROM R] 0x%04X: ", ((int)addr));
+ for (size_t i = 0; i < len; ++i) {
+ dprintf(" %02X", (int)(((uint8_t *)buf)[i]));
+ }
+ dprintf("\n");
+#endif // DEBUG_EEPROM_OUTPUT
+}
+
+void eeprom_write_block(const void *buf, void *addr, size_t len) {
+ uint8_t complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE + EXTERNAL_EEPROM_PAGE_SIZE];
+ uint8_t *read_buf = (uint8_t *)buf;
+ intptr_t target_addr = (intptr_t)addr;
+
+ init_i2c_if_required();
+ while (len > 0) {
+ intptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
+ int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
+ if (write_length > len) {
+ write_length = len;
+ }
+
+ fill_target_address(complete_packet, (const void *)target_addr);
+ for (uint8_t i = 0; i < write_length; i++) {
+ complete_packet[EXTERNAL_EEPROM_ADDRESS_SIZE + i] = read_buf[i];
+ }
+
+#ifdef DEBUG_EEPROM_OUTPUT
+ dprintf("[EEPROM W] 0x%04X: ", ((int)target_addr));
+ for (uint8_t i = 0; i < write_length; i++) {
+ dprintf(" %02X", (int)(read_buf[i]));
+ }
+ dprintf("\n");
+#endif // DEBUG_EEPROM_OUTPUT
+
+ i2c_transmit(EXTERNAL_EEPROM_I2C_ADDRESS((intptr_t)addr), complete_packet, EXTERNAL_EEPROM_ADDRESS_SIZE + write_length, 100);
+ wait_ms(EXTERNAL_EEPROM_WRITE_TIME);
+
+ read_buf += write_length;
+ target_addr += write_length;
+ len -= write_length;
+ }
+}
diff --git a/drivers/eeprom/eeprom_i2c.h b/drivers/eeprom/eeprom_i2c.h
new file mode 100644
index 0000000000..51bce825b0
--- /dev/null
+++ b/drivers/eeprom/eeprom_i2c.h
@@ -0,0 +1,115 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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
+
+/*
+ Default device configurations:
+
+ For the Sparkfun Qwiic I2C EEPROM module: https://www.sparkfun.com/products/14764
+ #define EEPROM_I2C_CAT24C512 // (part number 24512A)
+ #define EEPROM_I2C_RM24C512C // (part number 24512C)
+
+ For the Sparkfun I2C EEPROM chip: https://www.sparkfun.com/products/525
+ #define EEPROM_I2C_24LC256
+
+ For the Adafruit I2C FRAM chip: https://www.adafruit.com/product/1895
+ #define EEPROM_I2C_MB85RC256V
+*/
+#if defined(EEPROM_I2C_CAT24C512)
+# define EXTERNAL_EEPROM_BYTE_COUNT 65536
+# define EXTERNAL_EEPROM_PAGE_SIZE 128
+# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
+# define EXTERNAL_EEPROM_WRITE_TIME 5
+#elif defined(EEPROM_I2C_RM24C512C)
+# define EXTERNAL_EEPROM_BYTE_COUNT 65536
+# define EXTERNAL_EEPROM_PAGE_SIZE 128
+# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
+# define EXTERNAL_EEPROM_WRITE_TIME 3
+#elif defined(EEPROM_I2C_24LC256)
+# define EXTERNAL_EEPROM_BYTE_COUNT 32768
+# define EXTERNAL_EEPROM_PAGE_SIZE 64
+# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
+# define EXTERNAL_EEPROM_WRITE_TIME 5
+#elif defined(EEPROM_I2C_24LC128)
+# define EXTERNAL_EEPROM_BYTE_COUNT 16384
+# define EXTERNAL_EEPROM_PAGE_SIZE 64
+# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
+# define EXTERNAL_EEPROM_WRITE_TIME 5
+#elif defined(EEPROM_I2C_MB85RC256V)
+# define EXTERNAL_EEPROM_BYTE_COUNT 32768
+# define EXTERNAL_EEPROM_PAGE_SIZE 128
+# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
+# define EXTERNAL_EEPROM_WRITE_TIME 0
+#endif
+
+/*
+ The base I2C address of the EEPROM.
+ This needs to be shifted up by 1, to match i2c_master requirements.
+*/
+#ifndef EXTERNAL_EEPROM_I2C_BASE_ADDRESS
+# define EXTERNAL_EEPROM_I2C_BASE_ADDRESS 0b10100000
+#endif
+
+/*
+ The calculated I2C address based on the input memory location.
+
+ For EEPROM chips that embed part of the memory location in the I2C address
+ such as AT24M02 you can use something similar to the following (ensuring the
+ result is shifted by left by 1):
+
+ #define EXTERNAL_EEPROM_I2C_ADDRESS(loc) \
+ (EXTERNAL_EEPROM_I2C_BASE_ADDRESS | ((((loc) >> 16) & 0x07) << 1))
+
+*/
+#ifndef EXTERNAL_EEPROM_I2C_ADDRESS
+# define EXTERNAL_EEPROM_I2C_ADDRESS(loc) (EXTERNAL_EEPROM_I2C_BASE_ADDRESS)
+#endif
+
+/*
+ The total size of the EEPROM, in bytes. The EEPROM datasheet will usually
+ specify this value in kbits, and will require conversion to bytes.
+*/
+#ifndef EXTERNAL_EEPROM_BYTE_COUNT
+# define EXTERNAL_EEPROM_BYTE_COUNT 8192
+#endif
+
+/*
+ The page size in bytes of the EEPROM, as specified in the datasheet.
+*/
+#ifndef EXTERNAL_EEPROM_PAGE_SIZE
+# define EXTERNAL_EEPROM_PAGE_SIZE 32
+#endif
+
+/*
+ The address size in bytes of the EEPROM. For EEPROMs with <=256 bytes, this
+ will likely be 1. For EEPROMs >256 and <=65536, this will be 2. For EEPROMs
+ >65536, this will likely need to be 2 with the modified variant of
+ EXTERNAL_EEPROM_I2C_ADDRESS above.
+
+ As expected, consult the datasheet for specifics of your EEPROM.
+*/
+#ifndef EXTERNAL_EEPROM_ADDRESS_SIZE
+# define EXTERNAL_EEPROM_ADDRESS_SIZE 2
+#endif
+
+/*
+ The write cycle time of the EEPROM in milliseconds, as specified in the
+ datasheet.
+*/
+#ifndef EXTERNAL_EEPROM_WRITE_TIME
+# define EXTERNAL_EEPROM_WRITE_TIME 5
+#endif
diff --git a/drivers/eeprom/eeprom_transient.c b/drivers/eeprom/eeprom_transient.c
new file mode 100644
index 0000000000..b4c78c6f40
--- /dev/null
+++ b/drivers/eeprom/eeprom_transient.c
@@ -0,0 +1,52 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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 <stdint.h>
+#include <string.h>
+
+#include "eeprom_driver.h"
+#include "eeprom_transient.h"
+
+__attribute__((aligned(4))) static uint8_t transientBuffer[TRANSIENT_EEPROM_SIZE] = {0};
+
+size_t clamp_length(intptr_t offset, size_t len) {
+ if (offset + len > TRANSIENT_EEPROM_SIZE) {
+ len = TRANSIENT_EEPROM_SIZE - offset;
+ }
+
+ return len;
+}
+
+void eeprom_driver_init(void) { eeprom_driver_erase(); }
+
+void eeprom_driver_erase(void) { memset(transientBuffer, 0x00, TRANSIENT_EEPROM_SIZE); }
+
+void eeprom_read_block(void *buf, const void *addr, size_t len) {
+ intptr_t offset = (intptr_t)addr;
+ memset(buf, 0x00, len);
+ len = clamp_length(offset, len);
+ if (len > 0) {
+ memcpy(buf, &transientBuffer[offset], len);
+ }
+}
+
+void eeprom_write_block(const void *buf, void *addr, size_t len) {
+ intptr_t offset = (intptr_t)addr;
+ len = clamp_length(offset, len);
+ if (len > 0) {
+ memcpy(&transientBuffer[offset], buf, len);
+ }
+}
diff --git a/drivers/eeprom/eeprom_transient.h b/drivers/eeprom/eeprom_transient.h
new file mode 100644
index 0000000000..ca9d634f06
--- /dev/null
+++ b/drivers/eeprom/eeprom_transient.h
@@ -0,0 +1,25 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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
+
+/*
+ The size of the transient EEPROM buffer size.
+*/
+#ifndef TRANSIENT_EEPROM_SIZE
+# include "eeconfig.h"
+# define TRANSIENT_EEPROM_SIZE (((EECONFIG_SIZE+3)/4)*4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO
+#endif
diff --git a/quantum/audio/audio_arm.c b/quantum/audio/audio_arm.c
index 87d625301f..e4483c3028 100644
--- a/quantum/audio/audio_arm.c
+++ b/quantum/audio/audio_arm.c
@@ -258,7 +258,7 @@ void audio_init() {
}
// Check EEPROM
-#if defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
+#ifdef EEPROM_ENABLE
if (!eeconfig_is_enabled()) {
eeconfig_init();
}
diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index 40de19eac3..67d601af7f 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -19,9 +19,11 @@
# include <avr/eeprom.h>
# include <avr/interrupt.h>
#endif
+#ifdef EEPROM_ENABLE
+# include "eeprom.h"
+#endif
#ifdef STM32_EEPROM_ENABLE
# include "hal.h"
-# include "eeprom.h"
# include "eeprom_stm32.h"
#endif
#include "wait.h"
@@ -146,7 +148,7 @@ void rgblight_check_config(void) {
}
uint32_t eeconfig_read_rgblight(void) {
-#if defined(__AVR__) || defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
+#ifdef EEPROM_ENABLE
return eeprom_read_dword(EECONFIG_RGBLIGHT);
#else
return 0;
@@ -154,7 +156,7 @@ uint32_t eeconfig_read_rgblight(void) {
}
void eeconfig_update_rgblight(uint32_t val) {
-#if defined(__AVR__) || defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
+#ifdef EEPROM_ENABLE
rgblight_check_config();
eeprom_update_dword(EECONFIG_RGBLIGHT, val);
#endif
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index 8f355da123..5f149d8f4d 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -26,29 +26,11 @@ TMK_COMMON_SRC += $(COMMON_DIR)/host.c \
$(PLATFORM_COMMON_DIR)/bootloader.c \
ifeq ($(PLATFORM),AVR)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/xprintf.S
+ TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/xprintf.S
endif
ifeq ($(PLATFORM),CHIBIOS)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
- ifeq ($(MCU_SERIES), STM32F3xx)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
- TMK_COMMON_DEFS += -DEEPROM_EMU_STM32F303xC
- TMK_COMMON_DEFS += -DSTM32_EEPROM_ENABLE
- else ifeq ($(MCU_SERIES), STM32F1xx)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
- TMK_COMMON_DEFS += -DEEPROM_EMU_STM32F103xB
- TMK_COMMON_DEFS += -DSTM32_EEPROM_ENABLE
- else ifeq ($(MCU_SERIES)_$(MCU_LDSCRIPT), STM32F0xx_STM32F072xB)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_stm32.c
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/flash_stm32.c
- TMK_COMMON_DEFS += -DEEPROM_EMU_STM32F072xB
- TMK_COMMON_DEFS += -DSTM32_EEPROM_ENABLE
- else
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom_teensy.c
- endif
+ TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
ifeq ($(strip $(AUTO_SHIFT_ENABLE)), yes)
TMK_COMMON_SRC += $(CHIBIOS)/os/various/syscalls.c
else ifeq ($(strip $(TERMINAL_ENABLE)), yes)
@@ -57,15 +39,9 @@ ifeq ($(PLATFORM),CHIBIOS)
endif
ifeq ($(PLATFORM),ARM_ATSAM)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
+ TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/printf.c
endif
-ifeq ($(PLATFORM),TEST)
- TMK_COMMON_SRC += $(PLATFORM_COMMON_DIR)/eeprom.c
-endif
-
-
# Option modules
BOOTMAGIC_ENABLE ?= no
diff --git a/tmk_core/common/arm_atsam/eeprom.c b/tmk_core/common/arm_atsam/eeprom.c
index 44a0bf4d76..a69f382823 100644
--- a/tmk_core/common/arm_atsam/eeprom.c
+++ b/tmk_core/common/arm_atsam/eeprom.c
@@ -16,9 +16,12 @@
#include "eeprom.h"
-#define EEPROM_SIZE 32
+#ifndef EEPROM_SIZE
+# include "eeconfig.h"
+# define EEPROM_SIZE (((EECONFIG_SIZE+3)/4)*4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO
+#endif
-static uint8_t buffer[EEPROM_SIZE];
+__attribute__((aligned(4))) static uint8_t buffer[EEPROM_SIZE];
uint8_t eeprom_read_byte(const uint8_t *addr) {
uintptr_t offset = (uintptr_t)addr;
@@ -40,7 +43,7 @@ uint32_t eeprom_read_dword(const uint32_t *addr) {
return eeprom_read_byte(p) | (eeprom_read_byte(p + 1) << 8) | (eeprom_read_byte(p + 2) << 16) | (eeprom_read_byte(p + 3) << 24);
}
-void eeprom_read_block(void *buf, const void *addr, uint32_t len) {
+void eeprom_read_block(void *buf, const void *addr, size_t len) {
const uint8_t *p = (const uint8_t *)addr;
uint8_t * dest = (uint8_t *)buf;
while (len--) {
@@ -62,7 +65,7 @@ void eeprom_write_dword(uint32_t *addr, uint32_t value) {
eeprom_write_byte(p, value >> 24);
}
-void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
+void eeprom_write_block(const void *buf, void *addr, size_t len) {
uint8_t * p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
@@ -86,7 +89,7 @@ void eeprom_update_dword(uint32_t *addr, uint32_t value) {
eeprom_write_byte(p, value >> 24);
}
-void eeprom_update_block(const void *buf, void *addr, uint32_t len) {
+void eeprom_update_block(const void *buf, void *addr, size_t len) {
uint8_t * p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
diff --git a/tmk_core/common/chibios/eeprom_stm32.c b/tmk_core/common/chibios/eeprom_stm32.c
index 926b581c6b..ea51989728 100644
--- a/tmk_core/common/chibios/eeprom_stm32.c
+++ b/tmk_core/common/chibios/eeprom_stm32.c
@@ -173,7 +173,7 @@ void eeprom_update_dword(uint32_t *Address, uint32_t Value) {
}
}
-void eeprom_read_block(void *buf, const void *addr, uint32_t len) {
+void eeprom_read_block(void *buf, const void *addr, size_t len) {
const uint8_t *p = (const uint8_t *)addr;
uint8_t * dest = (uint8_t *)buf;
while (len--) {
@@ -181,7 +181,7 @@ void eeprom_read_block(void *buf, const void *addr, uint32_t len) {
}
}
-void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
+void eeprom_write_block(const void *buf, void *addr, size_t len) {
uint8_t * p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
@@ -189,7 +189,7 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
}
}
-void eeprom_update_block(const void *buf, void *addr, uint32_t len) {
+void eeprom_update_block(const void *buf, void *addr, size_t len) {
uint8_t * p = (uint8_t *)addr;
const uint8_t *src = (const uint8_t *)buf;
while (len--) {
diff --git a/tmk_core/common/chibios/eeprom_teensy.c b/tmk_core/common/chibios/eeprom_teensy.c
index a4093fb3ba..0fab9f73d6 100644
--- a/tmk_core/common/chibios/eeprom_teensy.c
+++ b/tmk_core/common/chibios/eeprom_teensy.c
@@ -50,7 +50,17 @@
// (aligned to 2 or 4 byte boundaries) has twice the endurance
// compared to writing 8 bit bytes.
//
-# define EEPROM_SIZE 32
+# ifndef EEPROM_SIZE
+# define EEPROM_SIZE 32
+# endif
+
+/*
+ ^^^ Here be dragons:
+ NXP AppNote AN4282 section 3.1 states that partitioning must only be done once.
+ Once EEPROM partitioning is done, the size is locked to this initial configuration.
+ Attempts to modify the EEPROM_SIZE setting may brick your board.
+*/
+
// Writing unaligned 16 or 32 bit data is handled automatically when
// this is defined, but at a cost of extra code size. Without this,
@@ -517,8 +527,11 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) {
#else
// No EEPROM supported, so emulate it
-# define EEPROM_SIZE 32
-static uint8_t buffer[EEPROM_SIZE];
+# ifndef EEPROM_SIZE
+# include "eeconfig.h"
+# define EEPROM_SIZE (((EECONFIG_SIZE+3)/4)*4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO