mtd: rawnand: Retrieve NV-DDR timing modes from the ONFI parameter page

When parsing the ONFI parameter page, save the available NV-DDR timing
modes in the core's dynamic ONFI structure. Once available to the rest
of the core out of the ONFI driver, these values will then be used to
derive the best timing mode.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210505213750.257417-10-miquel.raynal@bootlin.com

diff --git a/drivers/mtd/nand/raw/nand_onfi.c b/drivers/mtd/nand/raw/nand_onfi.c
index 02303455c34f51035896521d9bb21bffb4bbe836..f7a4a0573fe78ddb440fec790a386455a5e81907 100644 (file)
--- a/drivers/mtd/nand/raw/nand_onfi.c
+++ b/drivers/mtd/nand/raw/nand_onfi.c
@@ -316,6 +316,8 @@ int nand_onfi_detect(struct nand_chip *chip)
        onfi->tR = le16_to_cpu(p->t_r);
        onfi->tCCS = le16_to_cpu(p->t_ccs);
        onfi->sdr_timing_modes = le16_to_cpu(p->sdr_timing_modes);
+       if (p->features & ONFI_FEATURE_NV_DDR)
+               onfi->nvddr_timing_modes = p->nvddr_timing_modes;
        onfi->vendor_revision = le16_to_cpu(p->vendor_revision);
        memcpy(onfi->vendor, p->vendor, sizeof(p->vendor));
        chip->parameters.onfi = onfi;

diff --git a/include/linux/mtd/onfi.h b/include/linux/mtd/onfi.h
index 319e1736851ddbac6469b8c50fdf6a0da3d062aa..14e66a49557e3d7d15fc1fcf2b129c8849847d8e 100644 (file)
--- a/include/linux/mtd/onfi.h
+++ b/include/linux/mtd/onfi.h
@@ -25,6 +25,7 @@
 
 /* ONFI features */
 #define ONFI_FEATURE_16_BIT_BUS                BIT(0)
+#define ONFI_FEATURE_NV_DDR            BIT(5)
 #define ONFI_FEATURE_EXT_PARAM_PAGE    BIT(7)
 
 /* ONFI timing mode, used in both asynchronous and synchronous mode */
@@ -162,6 +163,7 @@ struct onfi_ext_param_page {
  * @tR: Page read time
  * @tCCS: Change column setup time
  * @sdr_timing_modes: Supported asynchronous/SDR timing modes
+ * @nvddr_timing_modes: Supported source synchronous/NV-DDR timing modes
  * @vendor_revision: Vendor specific revision number
  * @vendor: Vendor specific data
  */
@@ -172,6 +174,7 @@ struct onfi_params {
        u16 tR;
        u16 tCCS;
        u16 sdr_timing_modes;
+       u16 nvddr_timing_modes;
        u16 vendor_revision;
        u8 vendor[88];
 };