217 lines
6.2 KiB
C
217 lines
6.2 KiB
C
/*
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N25Q128 Flash Driver - Copyright (C) 2016 Giovanni Di Sirio
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This file is part of ChibiOS.
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ChibiOS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file n25q128.c
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* @brief N25Q128 flash interface module code.
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*
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* @addtogroup n25q128
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* @{
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*/
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#include "hal.h"
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#include "n25q128.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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static const flash_descriptor_t *get_attributes(void *instance);
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static flash_error_t erase_all(void *instance);
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static flash_error_t erase_sectors(void *instance,
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flash_sector_t sector,
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flash_sector_t n);
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static flash_error_t are_sectors_erased(void *instance,
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flash_sector_t sector,
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flash_sector_t n);
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static flash_error_t program(void *instance, flash_address_t addr,
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const uint8_t *pp, size_t n);
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static flash_error_t read(void *instance, flash_address_t addr,
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uint8_t *rp, size_t n);
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/**
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* @brief Virtual methods table.
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*/
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static const struct N25Q128DriverVMT n25q128_vmt = {
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get_attributes, erase_all, erase_sectors, are_sectors_erased,
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program, read
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};
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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static flash_descriptor_t descriptor = {
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.attributes = FLASH_ATTR_ERASED_IS_ONE | FLASH_ATTR_REWRITABLE,
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.page_size = 256,
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.sectors_count = 4096,
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.sectors = NULL,
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.sectors_size = 4096,
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.address = 0
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};
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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static void spi_send_cmd_read(N25Q128Driver *devp, uint8_t cmd,
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uint8_t *rp, size_t n) {
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#if N25Q128_SHARED_SPI == TRUE
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spiStart(devp->config->spip, devp->config->spicfg);
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spiAcquireBus(devp->config->spip);
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#endif
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spiSelect(devp->config->spip);
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spiSend(devp->config->spip, 1, &cmd);
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spiReceive(devp->config->spip, n, rp);
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spiUnselect(devp->config->spip);
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#if N25Q128_SHARED_SPI == TRUE
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spiReleaseBus(devp->config->spip);
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#endif
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}
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static void spi_send_cmd_addr_read(N25Q128Driver *devp,
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uint8_t cmd,
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flash_address_t addr,
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uint8_t *rp, size_t n) {
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uint8_t buf[4];
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#if N25Q128_SHARED_SPI == TRUE
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spiStart(devp->config->spip, devp->config->spicfg);
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spiAcquireBus(devp->config->spip);
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#endif
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buf[0] = cmd;
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buf[1] = (uint8_t)(addr >> 16);
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buf[2] = (uint8_t)(addr >> 8);
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buf[3] = (uint8_t)(addr >> 0);
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spiSelect(devp->config->spip);
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spiSend(devp->config->spip, 4, buf);
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spiReceive(devp->config->spip, n, rp);
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spiUnselect(devp->config->spip);
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#if N25Q128_SHARED_SPI == TRUE
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spiReleaseBus(devp->config->spip);
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#endif
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}
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static const flash_descriptor_t *get_attributes(void *instance) {
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(void)instance;
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return &descriptor;
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}
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static flash_error_t erase_all(void *instance) {
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(void)instance;
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return FLASH_NO_ERROR;
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}
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static flash_error_t erase_sectors(void *instance,
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flash_sector_t sector,
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flash_sector_t n) {
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(void)instance;
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(void)sector;
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(void)n;
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return FLASH_NO_ERROR;
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}
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static flash_error_t are_sectors_erased(void *instance,
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flash_sector_t sector,
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flash_sector_t n) {
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(void)instance;
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(void)sector;
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(void)n;
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return FLASH_NO_ERROR;
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}
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static flash_error_t program(void *instance, flash_address_t addr,
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const uint8_t *pp, size_t n) {
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(void)instance;
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(void)addr;
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(void)pp;
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(void)n;
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return FLASH_NO_ERROR;
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}
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static flash_error_t read(void *instance, flash_address_t addr,
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uint8_t *rp, size_t n) {
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spi_send_cmd_addr_read((N25Q128Driver *)instance, N25Q128_CMD_READ,
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addr, rp, n);
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return FLASH_NO_ERROR;
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}
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Initializes an instance.
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*
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* @param[out] devp pointer to the @p N25Q128Driver object
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*
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* @init
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*/
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void n15q128ObjectInit(N25Q128Driver *devp) {
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devp->vmt_baseflash = &n25q128_vmt;
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devp->config = NULL;
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}
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/**
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* @brief Configures and activates N25Q128 driver.
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*
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* @param[in] devp pointer to the @p N25Q128Driver object
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* @param[in] config pointer to the configuration
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*
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* @api
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*/
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void n15q128Start(N25Q128Driver *devp, const N25Q128Config *config) {
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(void)devp;
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(void)config;
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}
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/**
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* @brief Deactivates the N25Q128 driver.
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*
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* @param[in] devp pointer to the @p N25Q128Driver object
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*
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* @api
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*/
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void n15q128Stop(N25Q128Driver *devp) {
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(void)devp;
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}
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/** @} */
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