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drivers: flash: stm32 ospi can read the SFDP table from the DTS

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When the SFDP table is provided by the DeviceTree with sfdp-bfp property
It is NOT read from the octoFlash.
If no table exists in the DTS and flash read SPDP fails,
the device init fails.
Availability of this sfdp_read API is conditional
on selecting CONFIG_FLASH_JESD216_API.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2022-09-02 13:20:51 +02:00 • committed by Fabio Baltieri
commit 0da1323b95
1 changed files with 44 additions and 15 deletions
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57
drivers/flash/flash_stm32_ospi.c
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@ -391,26 +391,18 @@ static int ospi_read_jedec_id(const struct device *dev, uint8_t *id)
}
#endif /* CONFIG_FLASH_JESD216_API */
#if !DT_NODE_HAS_PROP(DT_INST(0, st_stm32_ospi_nor), sfdp_bfp)
/*
* Read Serial Flash Discovery Parameter :
* Read Serial Flash Discovery Parameter from the octoFlash at init :
* perform a read access over SPI bus for SDFP (DataMode is already set)
* or get it from the sdfp table (in the DTS)
*/
static int ospi_read_sfdp(const struct device *dev, off_t addr, uint8_t *data,
static int stm32_ospi_read_sfdp(const struct device *dev, off_t addr,
void *data,
size_t size)
{
const struct flash_stm32_ospi_config *dev_cfg = dev->config;
struct flash_stm32_ospi_data *dev_data = dev->data;
#if DT_NODE_HAS_PROP(DT_INST(0, st_stm32_ospi_nor), sfdp_bfp)
/* simulate the SDFP */
ARG_UNUSED(addr); /* addr is 0 */
for (uint8_t i_ind = 0; i_ind < MIN(size, ARRAY_SIZE(dev_cfg->sfdp_bfp)); i_ind++) {
*(data + i_ind) = dev_cfg->sfdp_bfp[i_ind];
}
#else /* sfdp_bfp */
OSPI_RegularCmdTypeDef cmd = ospi_prepare_cmd(dev_cfg->data_mode,
dev_cfg->data_rate);
if (dev_cfg->data_mode == OSPI_OPI_MODE) {
@ -436,17 +428,52 @@ static int ospi_read_sfdp(const struct device *dev, off_t addr, uint8_t *data,
return -EIO;
}
hal_ret = HAL_OSPI_Receive(&dev_data->hospi, data, HAL_OSPI_TIMEOUT_DEFAULT_VALUE);
hal_ret = HAL_OSPI_Receive(&dev_data->hospi, (uint8_t *)data,
HAL_OSPI_TIMEOUT_DEFAULT_VALUE);
if (hal_ret != HAL_OK) {
LOG_ERR("%d: Failed to read data", hal_ret);
return -EIO;
}
#endif /* sfdp_bfp */
dev_data->cmd_status = 0;
return 0;
}
#endif /* ! sfdp_bfp */
/*
* Read Serial Flash Discovery Parameter :
* perform a read access over SPI bus for SDFP (DataMode is already set)
* or get it from the sdfp table (in the DTS)
*/
static int ospi_read_sfdp(const struct device *dev, off_t addr, void *data,
size_t size)
{
#if DT_NODE_HAS_PROP(DT_INST(0, st_stm32_ospi_nor), sfdp_bfp)
/* There is a sfdp-bfp property in the deviceTree : do not read the flash */
const struct flash_stm32_ospi_config *dev_cfg = dev->config;
LOG_INF("Read SFDP from DTS property");
/* If DTS has the sdfp table property, check its length */
if (size > DT_INST_PROP_LEN(0, sfdp_bfp)) {
LOG_ERR("SDFP bdfp length is wrong (%d)", DT_INST_PROP_LEN(0, sfdp_bfp));
return -EIO;
}
/* The dev_cfg->sfdp_bfp if filled from the DTS property */
memcpy(data, dev_cfg->sfdp_bfp + addr, size);
return 0;
#else
LOG_INF("Read SFDP from octoFlash");
/* Get the SFDP from the octoFlash (no sfdp-bfp table in the DeviceTree) */
if (stm32_ospi_read_sfdp(dev, addr, data, size) == 0) {
/* If valid, then ignore any table from the DTS */
return 0;
}
LOG_INF("Error reading SFDP from octoFlash and none in the DTS");
return -EINVAL;
#endif /* sfdp_bfp */
}
static bool ospi_address_is_valid(const struct device *dev, off_t addr,
size_t size)
@ -1354,6 +1381,7 @@ static const struct flash_driver_api flash_stm32_ospi_driver_api = {
.page_layout = flash_stm32_ospi_pages_layout,
#endif
#if defined(CONFIG_FLASH_JESD216_API)
.sfdp_read = ospi_read_sfdp,
.read_jedec_id = ospi_read_jedec_id,
#endif /* CONFIG_FLASH_JESD216_API */
};
@ -2155,6 +2183,7 @@ static struct flash_stm32_ospi_data flash_stm32_ospi_dev_data = {
},
.qer_type = DT_QER_PROP_OR(0, JESD216_DW15_QER_VAL_S1B6),
.write_opcode = DT_WRITEOC_PROP_OR(0, SPI_NOR_WRITEOC_NONE),
.page_size = SPI_NOR_PAGE_SIZE, /* by default, to be updated by sfdp */
#if DT_NODE_HAS_PROP(DT_INST(0, st_stm32_ospi_nor), jedec_id)
.jedec_id = DT_INST_PROP(0, jedec_id),
#endif /* jedec_id */