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drivers: flash: Introduce SiWx91x Flash driver

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Add flash driver for Silicon Labs SiWx91x family.

Co-authored-by: Martin Hoff <martin.hoff@silabs.com>
Signed-off-by: Martin Hoff <martin.hoff@silabs.com>
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
This commit is contained in:
Jérôme Pouiller 2025-01-31 12:15:36 +01:00 committed by Benjamin Cabé
parent 4391e4c960
commit d97479fdc3
5 changed files with 201 additions and 0 deletions
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1
drivers/flash/CMakeLists.txt
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@ -60,6 +60,7 @@ zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_RV32M1 soc_flash_rv32m1.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_SAM flash_sam.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_SAM0 flash_sam0.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_SI32 flash_si32.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_SILABS_SIWX91X soc_flash_silabs_siwx91x.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_SMARTBOND flash_smartbond.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_TELINK_B91 soc_flash_b91.c)
zephyr_library_sources_ifdef(CONFIG_SOC_FLASH_XMC4XXX soc_flash_xmc4xxx.c)

1
drivers/flash/Kconfig
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@ -198,6 +198,7 @@ source "drivers/flash/Kconfig.sam"
source "drivers/flash/Kconfig.sam0"
source "drivers/flash/Kconfig.si32"
source "drivers/flash/Kconfig.simulator"
source "drivers/flash/Kconfig.siwx91x"
source "drivers/flash/Kconfig.smartbond"
source "drivers/flash/Kconfig.stm32"
source "drivers/flash/Kconfig.stm32_ospi"

15
drivers/flash/Kconfig.siwx91x Normal file
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@ -0,0 +1,15 @@
# Copyright (c) 2024 Silicon Laboratories Inc.
# SPDX-License-Identifier: Apache-2.0
config SOC_FLASH_SILABS_SIWX91X
bool "Silicon Labs SiWx91x flash driver"
default y
depends on DT_HAS_SILABS_SIWX91X_FLASH_CONTROLLER_ENABLED
select FLASH_HAS_DRIVER_ENABLED
select FLASH_HAS_EXPLICIT_ERASE
select FLASH_HAS_PAGE_LAYOUT
# Flash controller is handled by the network coprocessor
select WISECONNECT_NETWORK_STACK
help
Enable flash controller for flash embedded on Silicon Labs SiWx91x
chips.

176
drivers/flash/soc_flash_silabs_siwx91x.c Normal file
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@ -0,0 +1,176 @@
/*
* Copyright (c) 2024 Silicon Laboratories Inc.
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT silabs_siwx91x_flash_controller
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/flash.h>
#include <zephyr/logging/log.h>
#include "sl_si91x_driver.h"
LOG_MODULE_REGISTER(siwx91x_soc_flash);
struct siwx91x_config {
uintptr_t base_address;
uint32_t size;
uint32_t write_block_size;
uint32_t erase_block_size;
struct flash_parameters flash_parameters;
#ifdef CONFIG_FLASH_PAGE_LAYOUT
struct flash_pages_layout flash_pages_layout;
#endif
};
struct siwx91x_data {
struct k_sem lock;
};
static bool flash_siwx91x_range_is_in_bounds(const struct device *dev, off_t offset, size_t len)
{
const struct siwx91x_config *cfg = dev->config;
/* Note: If offset < __rom_region_end, the user to overwriting the current firmware. User
* is probably doing a mistake, but not an error from this driver point of view.
*/
if (offset < 0) {
return false;
}
if (offset + len > cfg->size) {
return false;
}
return true;
}
static const struct flash_parameters *flash_siwx91x_get_parameters(const struct device *dev)
{
const struct siwx91x_config *cfg = dev->config;
return &cfg->flash_parameters;
}
static int flash_siwx91x_read(const struct device *dev, off_t offset, void *buf, size_t len)
{
const struct siwx91x_config *cfg = dev->config;
struct siwx91x_data *data = dev->data;
void *location = (void *)(cfg->base_address + offset);
if (!flash_siwx91x_range_is_in_bounds(dev, offset, len)) {
return -EINVAL;
}
k_sem_take(&data->lock, K_FOREVER);
memcpy(buf, location, len);
k_sem_give(&data->lock);
return 0;
}
static int flash_siwx91x_write(const struct device *dev, off_t offset, const void *buf, size_t len)
{
const struct siwx91x_config *cfg = dev->config;
struct siwx91x_data *data = dev->data;
uint32_t ret;
if (!flash_siwx91x_range_is_in_bounds(dev, offset, len)) {
return -EINVAL;
}
if (offset % cfg->write_block_size) {
return -EINVAL;
}
if (len % cfg->write_block_size) {
return -EINVAL;
}
k_sem_take(&data->lock, K_FOREVER);
ret = sl_si91x_command_to_write_common_flash(cfg->base_address + offset, (void *)buf, len,
false);
k_sem_give(&data->lock);
if (ret) {
return -EIO;
}
return 0;
}
static int flash_siwx91x_erase(const struct device *dev, off_t offset, size_t len)
{
const struct siwx91x_config *cfg = dev->config;
struct siwx91x_data *data = dev->data;
uint32_t ret;
if (!flash_siwx91x_range_is_in_bounds(dev, offset, len)) {
return -EINVAL;
}
if (offset % cfg->erase_block_size) {
return -EINVAL;
}
if (len % cfg->erase_block_size) {
return -EINVAL;
}
k_sem_take(&data->lock, K_FOREVER);
ret = sl_si91x_command_to_write_common_flash(cfg->base_address + offset, NULL, len, true);
k_sem_give(&data->lock);
if (ret) {
return -EIO;
}
return 0;
}
#ifdef CONFIG_FLASH_PAGE_LAYOUT
static void flash_siwx91x_page_layout(const struct device *dev,
const struct flash_pages_layout **layout, size_t *layout_size)
{
const struct siwx91x_config *cfg = dev->config;
*layout = &cfg->flash_pages_layout;
*layout_size = 1;
}
#endif
static DEVICE_API(flash, siwx91x_api) = {
.read = flash_siwx91x_read,
.write = flash_siwx91x_write,
.erase = flash_siwx91x_erase,
.get_parameters = flash_siwx91x_get_parameters,
#ifdef CONFIG_FLASH_PAGE_LAYOUT
.page_layout = flash_siwx91x_page_layout,
#endif
};
static int flash_siwx91x_init(const struct device *dev)
{
struct siwx91x_data *data = dev->data;
k_sem_init(&data->lock, 1, 1);
return 0;
}
#ifdef CONFIG_FLASH_PAGE_LAYOUT
#define SIWX91X_PAGE_LAYOUT_FLASH_INIT(n) \
.flash_pages_layout.pages_count = DT_REG_SIZE(n) / DT_PROP(n, erase_block_size), \
.flash_pages_layout.pages_size = DT_PROP(n, erase_block_size),
#else
#define SIWX91X_PAGE_LAYOUT_FLASH_INIT(n)
#endif
#define SIWX91X_FLASH_INIT_P(n, p) \
static const struct siwx91x_config flash_siwx91x_config_##p = { \
.base_address = DT_REG_ADDR(n), \
.size = DT_REG_SIZE(n), \
.write_block_size = DT_PROP(n, write_block_size), \
.erase_block_size = DT_PROP(n, erase_block_size), \
.flash_parameters.write_block_size = DT_PROP(n, write_block_size), \
.flash_parameters.erase_value = 0xff, \
SIWX91X_PAGE_LAYOUT_FLASH_INIT(n) \
}; \
static struct siwx91x_data flash_siwx91x_data_##p = { \
.lock = Z_SEM_INITIALIZER(flash_siwx91x_data_##p.lock, 1, 1), \
}; \
DEVICE_DT_INST_DEFINE(p, flash_siwx91x_init, NULL, &flash_siwx91x_data_##p, \
&flash_siwx91x_config_##p, POST_KERNEL, CONFIG_FLASH_INIT_PRIORITY, \
&siwx91x_api);
#define SIWX91X_FLASH_INIT(p) \
BUILD_ASSERT(DT_INST_CHILD_NUM_STATUS_OKAY(p) == 1); \
DT_INST_FOREACH_CHILD_STATUS_OKAY_VARGS(p, SIWX91X_FLASH_INIT_P, p)
DT_INST_FOREACH_STATUS_OKAY(SIWX91X_FLASH_INIT)

8
dts/bindings/flash_controller/silabs,siwx91x-flash-controller.yaml Normal file
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@ -0,0 +1,8 @@
# Copyright (c) 2024 Silicon Laboratories Inc.
# SPDX-License-Identifier: Apache-2.0
description: Silicon Labs SiWx91x flash controller
compatible: "silabs,siwx91x-flash-controller"
include: flash-controller.yaml