From: <Tudor.Ambarus@microchip.com>
To: <boris.brezillon@collabora.com>, <marek.vasut@gmail.com>,
<vigneshr@ti.com>, <miquel.raynal@bootlin.com>, <richard@nod.at>,
<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Cc: Tudor.Ambarus@microchip.com
Subject: [RESEND PATCH v3 08/20] mtd: spi-nor: Split spi_nor_init_params()
Date: Mon, 26 Aug 2019 12:08:46 +0000 [thread overview]
Message-ID: <20190826120821.16351-9-tudor.ambarus@microchip.com> (raw)
In-Reply-To: <20190826120821.16351-1-tudor.ambarus@microchip.com>
From: Tudor Ambarus <tudor.ambarus@microchip.com>
Add functions to delimit what the chunks of code do:
static void spi_nor_init_params()
{
spi_nor_info_init_params()
spi_nor_manufacturer_init_params()
spi_nor_sfdp_init_params()
}
Add descriptions to all methods.
spi_nor_init_params() becomes of type void, as all its children
return void.
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
v3: rename spi_nor_legacy_init_params() to spi_nor_info_init_params()
drivers/mtd/spi-nor/spi-nor.c | 83 ++++++++++++++++++++++++++++++++-----------
1 file changed, 63 insertions(+), 20 deletions(-)
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 2a239531704a..1e7f8dc3457d 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -4186,7 +4186,34 @@ static void spi_nor_manufacturer_init_params(struct spi_nor *nor)
nor->info->fixups->default_init(nor);
}
-static int spi_nor_init_params(struct spi_nor *nor)
+/**
+ * spi_nor_sfdp_init_params() - Initialize the flash's parameters and settings
+ * based on JESD216 SFDP standard.
+ * @nor: pointer to a 'struct spi-nor'.
+ *
+ * The method has a roll-back mechanism: in case the SFDP parsing fails, the
+ * legacy flash parameters and settings will be restored.
+ */
+static void spi_nor_sfdp_init_params(struct spi_nor *nor)
+{
+ struct spi_nor_flash_parameter sfdp_params;
+
+ memcpy(&sfdp_params, &nor->params, sizeof(sfdp_params));
+
+ if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
+ nor->addr_width = 0;
+ nor->flags &= ~SNOR_F_4B_OPCODES;
+ } else {
+ memcpy(&nor->params, &sfdp_params, sizeof(nor->params));
+ }
+}
+
+/**
+ * spi_nor_info_init_params() - Initialize the flash's parameters and settings
+ * based on nor->info data.
+ * @nor: pointer to a 'struct spi-nor'.
+ */
+static void spi_nor_info_init_params(struct spi_nor *nor)
{
struct spi_nor_flash_parameter *params = &nor->params;
struct spi_nor_erase_map *map = ¶ms->erase_map;
@@ -4260,25 +4287,43 @@ static int spi_nor_init_params(struct spi_nor *nor)
spi_nor_set_erase_type(&map->erase_type[i], info->sector_size,
SPINOR_OP_SE);
spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
+}
+/**
+ * spi_nor_init_params() - Initialize the flash's parameters and settings.
+ * @nor: pointer to a 'struct spi-nor'.
+ *
+ * The flash parameters and settings are initialized based on a sequence of
+ * calls that are ordered by priority:
+ *
+ * 1/ Default flash parameters initialization. The initializations are done
+ * based on nor->info data:
+ * spi_nor_info_init_params()
+ *
+ * which can be overwritten by:
+ * 2/ Manufacturer flash parameters initialization. The initializations are
+ * done based on MFR register, or when the decisions can not be done solely
+ * based on MFR, by using specific flash_info tweeks, ->default_init():
+ * spi_nor_manufacturer_init_params()
+ *
+ * which can be overwritten by:
+ * 3/ SFDP flash parameters initialization. JESD216 SFDP is a standard and
+ * should be more accurate that the above.
+ * spi_nor_sfdp_init_params()
+ *
+ * Please not that there is a ->post_bfpt() fixup hook that can overwrite the
+ * flash parameters and settings imediately after parsing the Basic Flash
+ * Parameter Table.
+ */
+static void spi_nor_init_params(struct spi_nor *nor)
+{
+ spi_nor_info_init_params(nor);
spi_nor_manufacturer_init_params(nor);
- if ((info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
- !(info->flags & SPI_NOR_SKIP_SFDP)) {
- struct spi_nor_flash_parameter sfdp_params;
-
- memcpy(&sfdp_params, params, sizeof(sfdp_params));
-
- if (spi_nor_parse_sfdp(nor, &sfdp_params)) {
- nor->addr_width = 0;
- nor->flags &= ~SNOR_F_4B_OPCODES;
- } else {
- memcpy(params, &sfdp_params, sizeof(*params));
- }
- }
-
- return 0;
+ if ((nor->info->flags & (SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)) &&
+ !(nor->info->flags & SPI_NOR_SKIP_SFDP))
+ spi_nor_sfdp_init_params(nor);
}
static int spi_nor_select_read(struct spi_nor *nor,
@@ -4670,10 +4715,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
nor->info->flags & SPI_NOR_HAS_LOCK)
nor->clear_sr_bp = spi_nor_clear_sr_bp;
- /* Parse the Serial Flash Discoverable Parameters table. */
- ret = spi_nor_init_params(nor);
- if (ret)
- return ret;
+ /* Init flash parameters based on flash_info struct and SFDP */
+ spi_nor_init_params(nor);
if (!mtd->name)
mtd->name = dev_name(dev);
--
2.9.5
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next prev parent reply other threads:[~2019-08-26 12:10 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 12:08 [RESEND PATCH v3 00/20] mtd: spi-nor: move manuf out of the core Tudor.Ambarus
2019-08-26 12:08 ` [RESEND PATCH v3 01/20] mtd: spi-nor: Regroup flash parameter and settings Tudor.Ambarus
2019-08-27 4:21 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 02/20] mtd: spi-nor: Use nor->params Tudor.Ambarus
2019-08-27 4:31 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 03/20] mtd: spi-nor: Drop quad_enable() from 'struct spi-nor' Tudor.Ambarus
2019-08-27 4:47 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 04/20] mtd: spi-nor: Move erase_map to 'struct spi_nor_flash_parameter' Tudor.Ambarus
2019-08-26 12:38 ` Boris Brezillon
2019-08-27 5:39 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 05/20] mtd: spi-nor: Add default_init() hook to tweak flash parameters Tudor.Ambarus
2019-08-27 5:48 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 06/20] mtd: spi-nor: Add a default_init() fixup hook for gd25q256 Tudor.Ambarus
2019-08-27 5:48 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 07/20] mtd: spi_nor: Move manufacturer quad_enable() in ->default_init() Tudor.Ambarus
2019-08-27 5:54 ` Vignesh Raghavendra
2019-08-26 12:08 ` Tudor.Ambarus [this message]
2019-08-27 6:00 ` [RESEND PATCH v3 08/20] mtd: spi-nor: Split spi_nor_init_params() Vignesh Raghavendra
2019-08-27 7:01 ` Tudor.Ambarus
2019-08-26 12:08 ` [RESEND PATCH v3 09/20] mtd: spi-nor: Create a ->set_4byte() method Tudor.Ambarus
2019-08-27 6:07 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 10/20] mtd: spi-nor: Rework the SPI NOR lock/unlock logic Tudor.Ambarus
2019-08-27 6:36 ` Vignesh Raghavendra
2019-08-27 6:58 ` Tudor.Ambarus
2019-08-26 12:08 ` [RESEND PATCH v3 11/20] mtd: spi-nor: Add post_sfdp() hook to tweak flash config Tudor.Ambarus
2019-08-27 7:08 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 12/20] mtd: spi-nor: Add spansion_post_sfdp_fixups() Tudor.Ambarus
2019-08-27 7:10 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 13/20] mtd: spi-nor: Add a ->convert_addr() method Tudor.Ambarus
2019-08-27 7:13 ` Vignesh Raghavendra
2019-08-26 12:08 ` [RESEND PATCH v3 14/20] mtd: spi_nor: Add a ->setup() method Tudor.Ambarus
2019-08-26 12:40 ` Boris Brezillon
2019-08-26 13:38 ` Schrempf Frieder
2019-08-26 14:02 ` Boris Brezillon
2019-08-26 14:37 ` Schrempf Frieder
2019-08-27 7:16 ` Vignesh Raghavendra
2019-08-26 12:09 ` [RESEND PATCH v3 15/20] mtd: spi-nor: Add s3an_post_sfdp_fixups() Tudor.Ambarus
2019-08-27 7:18 ` Vignesh Raghavendra
2019-08-26 12:09 ` [RESEND PATCH v3 16/20] mtd: spi-nor: Add the SPI_NOR_XSR_RDY flag Tudor.Ambarus
2019-08-27 7:48 ` Vignesh Raghavendra
2019-08-26 12:09 ` [RESEND PATCH v3 17/20] mtd: spi-nor: Bring flash params init together Tudor.Ambarus
2019-08-27 7:35 ` Vignesh Raghavendra
2019-08-26 12:09 ` [RESEND PATCH v3 18/20] mtd: spi_nor: Introduce spi_nor_set_addr_width() Tudor.Ambarus
2019-08-27 7:37 ` Vignesh Raghavendra
2019-08-26 12:09 ` [RESEND PATCH v3 19/20] mtd: spi-nor: Introduce spi_nor_get_flash_info() Tudor.Ambarus
2019-08-27 7:37 ` Vignesh Raghavendra
2019-08-26 12:09 ` [RESEND RFC PATCH v3 20/20] mtd: spi-nor: Rework the disabling of block write protection Tudor.Ambarus
2019-08-26 12:49 ` Boris Brezillon
2019-08-27 5:33 ` [RESEND PATCH v3 00/20] mtd: spi-nor: move manuf out of the core Vignesh Raghavendra
2019-08-28 10:18 ` Tudor.Ambarus
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