zephyr/drivers/flash/soc_flash_mcux.c
Andrzej Głąbek 20202902f2 dts_fixups: Use DT_ prefix in all defined labels not related to Kconfig
These changes were obtained by running a script  created by
Ulf Magnusson <Ulf.Magnusson@nordicsemi.no> for the following
specification:

1. Read the contents of all dts_fixup.h files in Zephyr
2. Check the left-hand side of the #define macros (i.e. the X in
   #define X Y)
3. Check if that name is also the name of a Kconfig option
   3.a If it is, then do nothing
   3.b If it is not, then replace CONFIG_ with DT_ or add DT_ if it
       has neither of these two prefixes
4. Replace the use of the changed #define in the code itself
   (.c, .h, .ld)

Additionally, some tweaks had to be added to this script to catch some
of the macros used in the code in a parameterized form, e.g.:
- CONFIG_GPIO_STM32_GPIO##__SUFFIX##_BASE_ADDRESS
- CONFIG_UART_##idx##_TX_PIN
- I2C_SBCON_##_num##_BASE_ADDR
and to prevent adding DT_ prefix to the following symbols:
- FLASH_START
- FLASH_SIZE
- SRAM_START
- SRAM_SIZE
- _ROM_ADDR
- _ROM_SIZE
- _RAM_ADDR
- _RAM_SIZE
which are surprisingly also defined in some dts_fixup.h files.

Finally, some manual corrections had to be done as well:
- name##_IRQ -> DT_##name##_IRQ in uart_stm32.c

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
2018-11-13 10:44:42 -06:00

158 lines
3.5 KiB
C

/*
* Copyright (c) 2016 Linaro Limited
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <logging/sys_log.h>
#include <kernel.h>
#include <device.h>
#include <string.h>
#include <flash.h>
#include <errno.h>
#include <init.h>
#include <soc.h>
#include "flash_priv.h"
#include "fsl_common.h"
#include "fsl_flash.h"
struct flash_priv {
flash_config_t config;
/*
* HACK: flash write protection is managed in software.
*/
struct k_sem write_lock;
};
/*
* Interrupt vectors could be executed from flash hence the need for locking.
* The underlying MCUX driver takes care of copying the functions to SRAM.
*
* For more information, see the application note below on Read-While-Write
* http://cache.freescale.com/files/32bit/doc/app_note/AN4695.pdf
*
*/
static int flash_mcux_erase(struct device *dev, off_t offset, size_t len)
{
struct flash_priv *priv = dev->driver_data;
u32_t addr;
status_t rc;
unsigned int key;
if (k_sem_take(&priv->write_lock, K_NO_WAIT)) {
return -EACCES;
}
addr = offset + priv->config.PFlashBlockBase;
key = irq_lock();
rc = FLASH_Erase(&priv->config, addr, len, kFLASH_ApiEraseKey);
irq_unlock(key);
k_sem_give(&priv->write_lock);
return (rc == kStatus_Success) ? 0 : -EINVAL;
}
static int flash_mcux_read(struct device *dev, off_t offset,
void *data, size_t len)
{
struct flash_priv *priv = dev->driver_data;
u32_t addr;
/*
* The MCUX supports different flash chips whose valid ranges are
* hidden below the API: until the API export these ranges, we can not
* do any generic validation
*/
addr = offset + priv->config.PFlashBlockBase;
memcpy(data, (void *) addr, len);
return 0;
}
static int flash_mcux_write(struct device *dev, off_t offset,
const void *data, size_t len)
{
struct flash_priv *priv = dev->driver_data;
u32_t addr;
status_t rc;
unsigned int key;
if (k_sem_take(&priv->write_lock, K_NO_WAIT)) {
return -EACCES;
}
addr = offset + priv->config.PFlashBlockBase;
key = irq_lock();
rc = FLASH_Program(&priv->config, addr, (uint32_t *) data, len);
irq_unlock(key);
k_sem_give(&priv->write_lock);
return (rc == kStatus_Success) ? 0 : -EINVAL;
}
static int flash_mcux_write_protection(struct device *dev, bool enable)
{
struct flash_priv *priv = dev->driver_data;
int rc = 0;
if (enable) {
rc = k_sem_take(&priv->write_lock, K_FOREVER);
} else {
k_sem_give(&priv->write_lock);
}
return rc;
}
#if defined(CONFIG_FLASH_PAGE_LAYOUT)
static const struct flash_pages_layout dev_layout = {
.pages_count = KB(CONFIG_FLASH_SIZE) / FLASH_ERASE_BLOCK_SIZE,
.pages_size = FLASH_ERASE_BLOCK_SIZE,
};
static void flash_mcux_pages_layout(struct device *dev,
const struct flash_pages_layout **layout,
size_t *layout_size)
{
*layout = &dev_layout;
*layout_size = 1;
}
#endif /* CONFIG_FLASH_PAGE_LAYOUT */
static struct flash_priv flash_data;
static const struct flash_driver_api flash_mcux_api = {
.write_protection = flash_mcux_write_protection,
.erase = flash_mcux_erase,
.write = flash_mcux_write,
.read = flash_mcux_read,
#if defined(CONFIG_FLASH_PAGE_LAYOUT)
.page_layout = flash_mcux_pages_layout,
#endif
.write_block_size = FSL_FEATURE_FLASH_PFLASH_BLOCK_WRITE_UNIT_SIZE,
};
static int flash_mcux_init(struct device *dev)
{
struct flash_priv *priv = dev->driver_data;
status_t rc;
k_sem_init(&priv->write_lock, 0, 1);
rc = FLASH_Init(&priv->config);
return (rc == kStatus_Success) ? 0 : -EIO;
}
DEVICE_AND_API_INIT(flash_mcux, DT_FLASH_DEV_NAME,
flash_mcux_init, &flash_data, NULL, POST_KERNEL,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, &flash_mcux_api);