qmk-dactyl-manuform-a/drivers/eeprom/eeprom_spi.c

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2020-05-19 02:34:00 +02:00
/* Copyright 2020 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 SPI 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 "spi_master.h"
#include "eeprom.h"
#include "eeprom_spi.h"
#define CMD_WREN 6
#define CMD_WRDI 4
#define CMD_RDSR 5
#define CMD_WRSR 1
#define CMD_READ 3
#define CMD_WRITE 2
#define SR_WIP 0x01
// #define DEBUG_EEPROM_OUTPUT
#ifndef EXTERNAL_EEPROM_SPI_TIMEOUT
# define EXTERNAL_EEPROM_SPI_TIMEOUT 100
#endif
#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
# include "timer.h"
# include "debug.h"
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#endif // CONSOLE_ENABLE
static bool spi_eeprom_start(void) { return spi_start(EXTERNAL_EEPROM_SPI_SLAVE_SELECT_PIN, EXTERNAL_EEPROM_SPI_LSBFIRST, EXTERNAL_EEPROM_SPI_MODE, EXTERNAL_EEPROM_SPI_CLOCK_DIVISOR); }
static spi_status_t spi_eeprom_wait_while_busy(int timeout) {
uint32_t deadline = timer_read32() + timeout;
spi_status_t response;
do {
spi_write(CMD_RDSR);
response = spi_read();
if (timer_read32() >= deadline) {
return SPI_STATUS_TIMEOUT;
}
} while (response & SR_WIP);
return SPI_STATUS_SUCCESS;
}
static void spi_eeprom_transmit_address(uintptr_t addr) {
uint8_t buffer[EXTERNAL_EEPROM_ADDRESS_SIZE];
for (int i = 0; i < EXTERNAL_EEPROM_ADDRESS_SIZE; ++i) {
buffer[EXTERNAL_EEPROM_ADDRESS_SIZE - 1 - i] = addr & 0xFF;
addr >>= 8;
}
spi_transmit(buffer, EXTERNAL_EEPROM_ADDRESS_SIZE);
}
//----------------------------------------------------------------------------------------------------------------------
2020 November 28 Breaking Changes Update (#11053) * Branch point for 2020 November 28 Breaking Change * Remove matrix_col_t to allow MATRIX_ROWS > 32 (#10183) * Add support for soft serial to ATmega32U2 (#10204) * Change MIDI velocity implementation to allow direct control of velocity value (#9940) * Add ability to build a subset of all keyboards based on platform. * Actually use eeprom_driver_init(). * Make bootloader_jump weak for ChibiOS. (#10417) * Joystick 16-bit support (#10439) * Per-encoder resolutions (#10259) * Share button state from mousekey to pointing_device (#10179) * Add hotfix for chibios keyboards not wake (#10088) * Add advanced/efficient RGB Matrix Indicators (#8564) * Naming change. * Support for STM32 GPIOF,G,H,I,J,K (#10206) * Add milc as a dependency and remove the installed milc (#10563) * ChibiOS upgrade: early init conversions (#10214) * ChibiOS upgrade: configuration file migrator (#9952) * Haptic and solenoid cleanup (#9700) * XD75 cleanup (#10524) * OLED display update interval support (#10388) * Add definition based on currently-selected serial driver. (#10716) * New feature: Retro Tapping per key (#10622) * Allow for modification of output RGB values when using rgblight/rgb_matrix. (#10638) * Add housekeeping task callbacks so that keyboards/keymaps are capable of executing code for each main loop iteration. (#10530) * Rescale both ChibiOS and AVR backlighting. * Reduce Helix keyboard build variation (#8669) * Minor change to behavior allowing display updates to continue between task ticks (#10750) * Some GPIO manipulations in matrix.c change to atomic. (#10491) * qmk cformat (#10767) * [Keyboard] Update the Speedo firmware for v3.0 (#10657) * Maartenwut/Maarten namechange to evyd13/Evy (#10274) * [quantum] combine repeated lines of code (#10837) * Add step sequencer feature (#9703) * aeboards/ext65 refactor (#10820) * Refactor xelus/dawn60 for Rev2 later (#10584) * add DEBUG_MATRIX_SCAN_RATE_ENABLE to common_features.mk (#10824) * [Core] Added `add_oneshot_mods` & `del_oneshot_mods` (#10549) * update chibios os usb for the otg driver (#8893) * Remove HD44780 References, Part 4 (#10735) * [Keyboard] Add Valor FRL TKL (+refactor) (#10512) * Fix cursor position bug in oled_write_raw functions (#10800) * Fixup version.h writing when using SKIP_VERSION=yes (#10972) * Allow for certain code in the codebase assuming length of string. (#10974) * Add AT90USB support for serial.c (#10706) * Auto shift: support repeats and early registration (#9826) * Rename ledmatrix.h to match .c file (#7949) * Split RGB_MATRIX_ENABLE into _ENABLE and _DRIVER (#10231) * Split LED_MATRIX_ENABLE into _ENABLE and _DRIVER (#10840) * Merge point for 2020 Nov 28 Breaking Change
2020-11-28 21:02:18 +01:00
void eeprom_driver_init(void) { spi_init(); }
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void eeprom_driver_erase(void) {
#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
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uint32_t start = timer_read32();
#endif
uint8_t buf[EXTERNAL_EEPROM_PAGE_SIZE];
memset(buf, 0x00, EXTERNAL_EEPROM_PAGE_SIZE);
for (uint32_t addr = 0; addr < EXTERNAL_EEPROM_BYTE_COUNT; addr += EXTERNAL_EEPROM_PAGE_SIZE) {
eeprom_write_block(buf, (void *)(uintptr_t)addr, EXTERNAL_EEPROM_PAGE_SIZE);
}
#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
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dprintf("EEPROM erase took %ldms to complete\n", ((long)(timer_read32() - start)));
#endif
}
void eeprom_read_block(void *buf, const void *addr, size_t len) {
//-------------------------------------------------
// Wait for the write-in-progress bit to be cleared
bool res = spi_eeprom_start();
if (!res) {
dprint("failed to start SPI for WIP check\n");
memset(buf, 0, len);
return;
}
spi_status_t response = spi_eeprom_wait_while_busy(EXTERNAL_EEPROM_SPI_TIMEOUT);
spi_stop();
if (response == SPI_STATUS_TIMEOUT) {
dprint("SPI timeout for WIP check\n");
memset(buf, 0, len);
return;
}
//-------------------------------------------------
// Perform read
res = spi_eeprom_start();
if (!res) {
dprint("failed to start SPI for read\n");
memset(buf, 0, len);
return;
}
spi_write(CMD_READ);
spi_eeprom_transmit_address((uintptr_t)addr);
spi_receive(buf, len);
#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
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dprintf("[EEPROM R] 0x%08lX: ", ((uint32_t)(uintptr_t)addr));
for (size_t i = 0; i < len; ++i) {
dprintf(" %02X", (int)(((uint8_t *)buf)[i]));
}
dprintf("\n");
#endif // DEBUG_EEPROM_OUTPUT
spi_stop();
}
void eeprom_write_block(const void *buf, void *addr, size_t len) {
bool res;
uint8_t * read_buf = (uint8_t *)buf;
uintptr_t target_addr = (uintptr_t)addr;
while (len > 0) {
uintptr_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;
}
//-------------------------------------------------
// Wait for the write-in-progress bit to be cleared
res = spi_eeprom_start();
if (!res) {
dprint("failed to start SPI for WIP check\n");
return;
}
spi_status_t response = spi_eeprom_wait_while_busy(EXTERNAL_EEPROM_SPI_TIMEOUT);
spi_stop();
if (response == SPI_STATUS_TIMEOUT) {
dprint("SPI timeout for WIP check\n");
return;
}
//-------------------------------------------------
// Enable writes
res = spi_eeprom_start();
if (!res) {
dprint("failed to start SPI for write-enable\n");
return;
}
spi_write(CMD_WREN);
spi_stop();
//-------------------------------------------------
// Perform the write
res = spi_eeprom_start();
if (!res) {
dprint("failed to start SPI for write\n");
return;
}
#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
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dprintf("[EEPROM W] 0x%08lX: ", ((uint32_t)(uintptr_t)target_addr));
for (size_t i = 0; i < write_length; i++) {
dprintf(" %02X", (int)(uint8_t)(read_buf[i]));
}
dprintf("\n");
#endif // DEBUG_EEPROM_OUTPUT
spi_write(CMD_WRITE);
spi_eeprom_transmit_address(target_addr);
spi_transmit(read_buf, write_length);
spi_stop();
read_buf += write_length;
target_addr += write_length;
len -= write_length;
}
//-------------------------------------------------
// Disable writes
res = spi_eeprom_start();
if (!res) {
dprint("failed to start SPI for write-disable\n");
return;
}
spi_write(CMD_WRDI);
spi_stop();
}