From: Apurva Nandan <a-nandan@ti.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Mark Brown <broonie@kernel.org>,
Patrice Chotard <patrice.chotard@foss.st.com>,
Boris Brezillon <boris.brezillon@collabora.com>,
<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
<linux-spi@vger.kernel.org>, Pratyush Yadav <p.yadav@ti.com>
Subject: Re: [PATCH 10/13] mtd: spinand: Add octal_dtr_enable() for Winbond manufacturer_ops
Date: Fri, 20 Aug 2021 17:01:40 +0530 [thread overview]
Message-ID: <0ac67f14-b25c-2e3b-fdd9-f5f101d9caad@ti.com> (raw)
In-Reply-To: <20210806210609.0fd94b9e@xps13>
Hi Miquèl,
On 07/08/21 12:36 am, Miquel Raynal wrote:
> Hi Apurva,
>
> Apurva Nandan <a-nandan@ti.com> wrote on Tue, 13 Jul 2021 13:05:35
> +0000:
>
>> Add implementation of octal_dtr_enable() manufacturer_ops for Winbond.
>> To switch to Ocatl DTR mode, setting programmable dummy cycles and
>> SPI IO mode using the volatile configuration register is required. To
>> function at max 120MHz SPI clock in Octal DTR mode, 12 programmable
>> dummy clock cycle setting is required. (Default number of dummy cycle
>> are 8 clocks)
>>
>> Set the programmable dummy cycle to 12 clocks, and SPI IO mode to
>> Octal DTR with Data Strobe in the VCR. Also, perform a READ ID
>> operation in Octal DTR SPI mode to ensure the switch was successful.
>
> Commit title should contain "winbond:" (same for the previous patch and
> possibly next ones as well).
>
Okay, got it!
>> Datasheet: https://www.winbond.com/export/sites/winbond/datasheet/W35N01JW_Datasheet_Brief.pdf
>>
>> Signed-off-by: Apurva Nandan <a-nandan@ti.com>
>> ---
>> drivers/mtd/nand/spi/winbond.c | 42 ++++++++++++++++++++++++++++++++++
>> 1 file changed, 42 insertions(+)
>>
>> diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
>> index a7052a9ca171..58cda07c15a0 100644
>> --- a/drivers/mtd/nand/spi/winbond.c
>> +++ b/drivers/mtd/nand/spi/winbond.c
>> @@ -16,6 +16,14 @@
>>
>> #define WINBOND_CFG_BUF_READ BIT(3)
>>
>> +/* Octal DTR SPI mode (8D-8D-8D) with Data Strobe output*/
>> +#define WINBOND_IO_MODE_VCR_OCTAL_DTR 0xE7
>> +#define WINBOND_IO_MODE_VCR_ADDR 0x00
>> +
>> +/* Use 12 dummy clk cycles for using Octal DTR SPI at max 120MHZ */
>> +#define WINBOND_DUMMY_CLK_COUNT 12
>> +#define WINBOND_DUMMY_CLK_VCR_ADDR 0x01
>> +
>> static SPINAND_OP_VARIANTS(read_cache_variants,
>> SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
>> SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
>> @@ -142,8 +150,42 @@ static int winbond_write_vcr_op(struct spinand_device *spinand, u8 reg, u8 val)
>> return 0;
>> }
>>
>> +static int winbond_spinand_octal_dtr_enable(struct spinand_device *spinand)
>> +{
>> + int ret;
>> + struct spi_mem_op op;
>> +
>> + ret = winbond_write_vcr_op(spinand, WINBOND_DUMMY_CLK_VCR_ADDR,
>> + WINBOND_DUMMY_CLK_COUNT);
>> + if (ret)
>> + return ret;
>> +
>> + ret = winbond_write_vcr_op(spinand, WINBOND_IO_MODE_VCR_ADDR,
>> + WINBOND_IO_MODE_VCR_OCTAL_DTR);
>> + if (ret)
>> + return ret;
>> +
>> + /* Read flash ID to make sure the switch was successful. */
>> + op = (struct spi_mem_op)
>> + SPI_MEM_OP(SPI_MEM_OP_CMD_DTR(2, 0x9f9f, 8),
>> + SPI_MEM_OP_NO_ADDR,
>> + SPI_MEM_OP_DUMMY_DTR(16, 8),
>> + SPI_MEM_OP_DATA_IN_DTR(SPINAND_MAX_ID_LEN,
>> + spinand->scratchbuf, 8));
>> +
>> + ret = spi_mem_exec_op(spinand->spimem, &op);
>> + if (ret)
>> + return ret;
>> +
>> + if (memcmp(spinand->scratchbuf, spinand->id.data, SPINAND_MAX_ID_LEN))
>> + return -EINVAL;
>> +
>> + return 0;
>> +}
>> +
>> static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {
>> .init = winbond_spinand_init,
>> + .octal_dtr_enable = winbond_spinand_octal_dtr_enable,
>> };
>>
>> const struct spinand_manufacturer winbond_spinand_manufacturer = {
>
>
>
>
> Thanks,
> Miquèl
>
> ______________________________________________________
> Linux MTD discussion mailing list
> http://lists.infradead.org/mailman/listinfo/linux-mtd/
>
Thanks,
Apurva Nandan
next prev parent reply other threads:[~2021-08-20 11:32 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-13 13:05 [PATCH 00/13] mtd: spinand: Add Octal DTR SPI (8D-8D-8D) mode support Apurva Nandan
2021-07-13 13:05 ` [PATCH 01/13] spi: spi-mem: Add DTR templates for cmd, address, dummy and data phase Apurva Nandan
2021-07-14 17:06 ` Mark Brown
2021-08-23 7:57 ` Boris Brezillon
2021-07-13 13:05 ` [PATCH 02/13] mtd: spinand: Add enum spinand_proto to indicate current SPI IO mode Apurva Nandan
2021-07-13 13:05 ` [PATCH 03/13] mtd: spinand: Setup spi_mem_op for the SPI IO protocol using reg_proto Apurva Nandan
2021-08-06 18:30 ` Miquel Raynal
2021-08-20 9:52 ` Apurva Nandan
2021-08-20 12:08 ` Miquel Raynal
2021-08-23 7:11 ` Boris Brezillon
2021-08-23 7:24 ` Miquel Raynal
2021-07-13 13:05 ` [PATCH 04/13] mtd: spinand: Fix odd byte addr and data phase in read/write reg op and write VCR op for Octal DTR mode Apurva Nandan
2021-08-06 18:43 ` Miquel Raynal
2021-08-20 10:27 ` Apurva Nandan
2021-08-20 12:06 ` Miquel Raynal
2021-07-13 13:05 ` [PATCH 05/13] mtd: spinand: Add adjust_op() in manufacturer_ops to modify the ops for manufacturer specific changes Apurva Nandan
2021-07-13 13:05 ` [PATCH 06/13] mtd: spinand: Add macros for Octal DTR page read and write operations Apurva Nandan
2021-08-06 18:54 ` Miquel Raynal
2021-08-20 10:35 ` Apurva Nandan
2021-07-13 13:05 ` [PATCH 07/13] mtd: spinand: Allow enabling Octal DTR mode in the core Apurva Nandan
2021-08-06 18:58 ` Miquel Raynal
2021-08-20 10:41 ` Apurva Nandan
2021-07-13 13:05 ` [PATCH 08/13] mtd: spinand: Reject 8D-8D-8D op_templates if octal_dtr_enale() is missing in manufacturer_op Apurva Nandan
2021-08-06 19:01 ` Miquel Raynal
2021-08-20 11:26 ` Apurva Nandan
2021-08-20 12:14 ` Miquel Raynal
2021-08-20 13:54 ` Apurva Nandan
2021-08-20 14:38 ` Miquel Raynal
2021-08-20 15:53 ` Apurva Nandan
2021-07-13 13:05 ` [PATCH 09/13] mtd: spinand: Add support for write volatile configuration register op Apurva Nandan
2021-08-06 19:05 ` Miquel Raynal
2021-08-20 11:30 ` Apurva Nandan
2021-07-13 13:05 ` [PATCH 10/13] mtd: spinand: Add octal_dtr_enable() for Winbond manufacturer_ops Apurva Nandan
2021-08-06 19:06 ` Miquel Raynal
2021-08-20 11:31 ` Apurva Nandan [this message]
2021-07-13 13:05 ` [PATCH 11/13] mtd: spinand: Add support for Power-on-Reset (PoR) instruction Apurva Nandan
2021-08-06 19:08 ` Miquel Raynal
2021-08-20 11:39 ` Apurva Nandan
2021-08-20 12:18 ` Miquel Raynal
2021-08-20 13:41 ` Apurva Nandan
2021-08-20 14:17 ` Miquel Raynal
2021-08-20 15:56 ` Apurva Nandan
2021-07-13 13:05 ` [PATCH 12/13] mtd: spinand: Perform Power-on-Reset when runtime_pm suspend is issued Apurva Nandan
2021-08-06 19:12 ` Miquel Raynal
2021-08-20 11:45 ` Apurva Nandan
2021-07-13 13:05 ` [PATCH 13/13] mtd: spinand: Add support for Winbond W35N01JW SPI NAND flash Apurva Nandan
2021-08-06 19:14 ` Miquel Raynal
2021-08-20 11:51 ` Apurva Nandan
2021-08-20 12:02 ` Miquel Raynal
2021-08-20 13:14 ` Apurva Nandan
2021-07-20 16:53 ` [PATCH 00/13] mtd: spinand: Add Octal DTR SPI (8D-8D-8D) mode support Nandan, Apurva
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0ac67f14-b25c-2e3b-fdd9-f5f101d9caad@ti.com \
--to=a-nandan@ti.com \
--cc=boris.brezillon@collabora.com \
--cc=broonie@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mtd@lists.infradead.org \
--cc=linux-spi@vger.kernel.org \
--cc=miquel.raynal@bootlin.com \
--cc=p.yadav@ti.com \
--cc=patrice.chotard@foss.st.com \
--cc=richard@nod.at \
--cc=vigneshr@ti.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).