linux-kernel - Re: [PATCH 1/3] mtd: rawnand: hynix: Add support for H27UCG8T2FTR-BC MLC NAND

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Message-ID: <1b17f332-827b-c8b1-807c-9c6e38caf173@sholland.org>
Date:   Fri, 30 Dec 2022 10:08:13 -0600
From:   Samuel Holland <samuel@...lland.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] mtd: rawnand: hynix: Add support for H27UCG8T2FTR-BC
 MLC NAND

Hi Miquèl,

On 12/30/22 06:45, Miquel Raynal wrote:
> Hi Samuel,
> 
> samuel@...lland.org wrote on Thu, 29 Dec 2022 13:09:03 -0600:
> 
>> H27UCG8T2FTR-BC is similar to the already-supported H27UCG8T2ETR-BC, but
>> reports a different ID.
> 
> Can you provide a datasheet for this part? I am surprised by the page
> size. In general anyway, it's best to provide a link when adding
> support for a new component.

I was unable to find a datasheet for specifically H27UCG8T2FTR-BC. The
best datasheet I could find is for H27UCG8T2ETR-BC[0][1]. However, there
are layout parameters for H27UCG8T2FTR-BC in some versions of the vendor
NAND driver[2][3][4]. The Hynix chip is packaged as Essencore
I3T-8GQ8T2H5TARC, as referenced in that NAND ID table, which is the
actual package on the board I have.

Regards,
Samuel

[0]:
https://z3d9b7u8.stackpathcdn.com/pdf-down/H/2/7/H27UCG8T2ETR-BC-Hynix.pdf
[1]: http://www.zsong.com.cn/userfiles/H27UC(D)G8T(U)2ETR-BC_Rev1.0_0826.pdf
[2]:
https://github.com/engSinteck/A133_Image/blob/main/longan/kernel/linux-4.9/modules/nand/sun8iw15p1/phy-nand/physic_v2/nand_id2.c#L1592
[3]:
https://github.com/launchfur/rg818-kernel/blob/master/modules/nand/sun8iw15p1/phy-nand/physic_v2/nand_id2.c#L1592
[4]: Adding member names to that table entry:

{.nand_id               = {0xad, 0xde, 0x14, 0xab, 0x42, 0x4a,
                           0xff, 0xff},
 .die_cnt_per_chip      = 1,
 .sect_cnt_per_page     = 32,
 .page_cnt_per_blk      = 256,
 .blk_cnt_per_die       = 2112,
 #define NAND_MULTI_PROGRAM (1 << 3)
 #define NAND_RANDOM        (1 << 7)
 #define NAND_READ_RETRY    (1 << 8)
 #define NAND_LSB_PAGE_TYPE (0xff << 12)
 .operation_opt         = 0x00002188,
 .valid_blk_ratio       = 896,
 .access_freq           = 40,
 .ecc_mode              = 8,
 .read_retry_type       = 0x050804,
 .ddr_type              = 0,
 .option_phyisc_op_no   = 14,
 .ddr_info_no           = 0,
 .id_number             = 0x010026,
 .max_blk_erase_times   = 3000,
 .driver_no             = 1,
 .access_high_freq      = 40,
 .random_cmd2_send_flag = 0,
 .random_addr_num       = 0,
 .nand_real_page_size   = 16384 + 1664},

".option_phyisc_op_no = 14" references this entry:
{
    /* 14 */
    .multi_plane_read_cmd = {0x60, 0x30},
    .multi_plane_write_cmd = {0x11, 0x81},
    .multi_plane_copy_read_cmd = {0x60, 0x60, 0x35},
    .multi_plane_copy_write_cmd = {0x85, 0x11, 0x81},
    .multi_plane_status_cmd = 0x78,
    .inter_bnk0_status_cmd = 0x78,
    .inter_bnk1_status_cmd = 0x78,
    .bad_block_flag_position = 0x00,
    .multi_plane_block_offset = 1024,
},