lkml.org 
[lkml]   [2016]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRE: [PATCH v3 6/9] mtd: spi-nor: Support R/W for S25FS-S family flash
    Date
    On Thu, Nov 18, 2016 at 12:31 PM, Han Xu wrote:
    > On Thu, Nov 17, 2016 at 3:14 AM, Yao Yuan <yao.yuan@nxp.com> wrote:
    > > On Thu, Nov 17, 2016 at 06:50:55AM +0000, Krzeminski, Marcin (Nokia -
    > PL/Wroclaw) wrote:
    > >> > > > On Thu, Aug 18, 2016 at 2:38 AM, Yunhui Cui
    > >> > > > <B56489@freescale.com>
    > >> > > > wrote:
    > >> > > > > From: Yunhui Cui <yunhui.cui@nxp.com>
    > >> > > > >
    > >> > > > > With the physical sectors combination, S25FS-S family flash
    > >> > > > > requires some special operations for read/write functions.
    > >> > > > >
    > >> > > > > Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com>
    > >> > > > > ---
    > >> > > > > drivers/mtd/spi-nor/spi-nor.c | 56
    > >> > > > > +++++++++++++++++++++++++++++++++++++++++++
    > >> > > > > 1 file changed, 56 insertions(+)
    > >> > > > >
    > >> > > > > diff --git a/drivers/mtd/spi-nor/spi-nor.c
    > >> > > > > b/drivers/mtd/spi-nor/spi-nor.c index d0fc165..495d0bb 100644
    > >> > > > > --- a/drivers/mtd/spi-nor/spi-nor.c
    > >> > > > > +++ b/drivers/mtd/spi-nor/spi-nor.c
    > >> > > > > @@ -39,6 +39,10 @@
    > >> > > > >
    > >> > > > > #define SPI_NOR_MAX_ID_LEN 6
    > >> > > > > #define SPI_NOR_MAX_ADDR_WIDTH 4
    > >> > > > > +/* Added for S25FS-S family flash */
    > >> > > > > +#define SPINOR_CONFIG_REG3_OFFSET 0x800004
    > >> > > > > +#define CR3V_4KB_ERASE_UNABLE 0x8 #define
    > >> > > > > +SPINOR_S25FS_FAMILY_EXT_JEDEC 0x81
    > >> > > > >
    > >> > > > > struct flash_info {
    > >> > > > > char *name;
    > >> > > > > @@ -78,6 +82,7 @@ struct flash_info { };
    > >> > > > >
    > >> > > > > #define JEDEC_MFR(info) ((info)->id[0])
    > >> > > > > +#define EXT_JEDEC(info) ((info)->id[5])
    > >> > > > >
    > >> > > > > static const struct flash_info *spi_nor_match_id(const char
    > >> > > > > *name);
    > >> > > > >
    > >> > > > > @@ -899,6 +904,7 @@ static const struct flash_info spi_nor_ids[] = {
    > >> > > > > */
    > >> > > > > { "s25sl032p", INFO(0x010215, 0x4d00, 64 * 1024,
    > >> > > > > 64,
    > >> > > > SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
    > >> > > > > { "s25sl064p", INFO(0x010216, 0x4d00, 64 * 1024,
    > >> > > > > 128, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
    > >> > > > > + { "s25fs256s1", INFO6(0x010219, 0x4d0181, 64 * 1024,
    > >> > > > > + 512, 0)},
    > >> > > > > { "s25fl256s0", INFO(0x010219, 0x4d00, 256 * 1024, 128, 0) },
    > >> > > > > { "s25fl256s1", INFO(0x010219, 0x4d01, 64 * 1024,
    > >> > > > > 512,
    > >> > > > SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
    > >> > > > > { "s25fl512s", INFO(0x010220, 0x4d00, 256 * 1024,
    > >> > > > > 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) }, @@ -1036,6
    > >> > +1042,50
    > >> > > > @@ static const struct flash_info *spi_nor_read_id(struct
    > >> > > > spi_nor
    > >> > > > *nor)
    > >> > > > > return ERR_PTR(-ENODEV); }
    > >> > > > >
    > >> > > > > +/*
    > >> > > > > + * The S25FS-S family physical sectors may be configured as
    > >> > > > > +a
    > >> > > > > + * hybrid combination of eight 4-kB parameter sectors
    > >> > > > > + * at the top or bottom of the address space with all
    > >> > > > > + * but one of the remaining sectors being uniform size.
    > >> > > > > + * The Parameter Sector Erase commands (20h or 21h) must
    > >> > > > > + * be used to erase the 4-kB parameter sectors individually.
    > >> > > > > + * The Sector (uniform sector) Erase commands (D8h or DCh)
    > >> > > > > + * must be used to erase any of the remaining
    > >> > > > > + * sectors, including the portion of highest or lowest
    > >> > > > > +address
    > >> > > > > + * sector that is not overlaid by the parameter sectors.
    > >> > > > > + * The uniform sector erase command has no effect on
    > >> > > > > +parameter
    > >> > > > sectors.
    > >> > > > > + */
    > >> > > > > +static int spansion_s25fs_disable_4kb_erase(struct spi_nor *nor) {
    > >> > > > > + u32 cr3v_addr = SPINOR_CONFIG_REG3_OFFSET;
    > >> > > > > + u8 cr3v = 0x0;
    > >> > > > > + int ret = 0x0;
    > >> > > > > +
    > >> > > > > + nor->cmd_buf[2] = cr3v_addr >> 16;
    > >> > > > > + nor->cmd_buf[1] = cr3v_addr >> 8;
    > >> > > > > + nor->cmd_buf[0] = cr3v_addr >> 0;
    > >> > > > > +
    > >> > > > > + ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v,
    > 1);
    > >> > > > > + if (ret)
    > >> > > > > + return ret;
    > >> > > > > + if (cr3v & CR3V_4KB_ERASE_UNABLE)
    > >> > > > > + return 0;
    > >> > > > > + ret = nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0);
    > >> > > > > + if (ret)
    > >> > > > > + return ret;
    > >> > > > > + cr3v = CR3V_4KB_ERASE_UNABLE;
    > >> > > > > + nor->program_opcode = SPINOR_OP_SPANSION_WRAR;
    > >> > > > > + nor->write(nor, cr3v_addr, 1, &cr3v);
    > >> > > > > +
    > >> > > > > + ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v,
    > 1);
    > >> > > > > + if (ret)
    > >> > > > > + return ret;
    > >> > > > > + if (!(cr3v & CR3V_4KB_ERASE_UNABLE))
    > >> > > > > + return -EPERM;
    > >> > > > > +
    > >> > > > > + return 0;
    > >> > > > > +}
    > >> > > > > +
    > >> > > > > static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
    > >> > > > > size_t *retlen, u_char *buf) { @@
    > >> > > > > -1361,6
    > >> > > > > +1411,12 @@ int spi_nor_scan(struct spi_nor *nor, const char
    > >> > > > > +*name,
    > >> > > > enum read_mode mode)
    > >> > > > > spi_nor_wait_till_ready(nor);
    > >> > > > > }
    > >> > > > >
    > >> > > > > + if (EXT_JEDEC(info) == SPINOR_S25FS_FAMILY_EXT_JEDEC) {
    > >> > > > > + ret = spansion_s25fs_disable_4kb_erase(nor);
    > >> > > > > + if (ret)
    > >> > > > > + return ret;
    > >> > > > > + }
    > >> > > > > +
    > >> > > > > if (!mtd->name)
    > >> > > > > mtd->name = dev_name(dev);
    > >> > > > > mtd->priv = nor;
    > >> > > > > --
    > >> > > > > 2.1.0.27.g96db324
    > >> > > > >
    > >> > > > >
    > >> > > > Hi Brian, I will ack this change but still feel it's kind of hacking code.
    > >> > > >
    > >> > > > Acked-by: Han xu <han.xu@nxp.com>
    > >> > >
    > >> > > I am new on the list so I am not sure if this topic has been discussed.
    > >> > > Generally our product functionality relay on those 4KiB sectors.
    > >> > > I know that this hack is already in u-boot, but if you mainstream
    > >> > > this you will force users of those 4KiB sectors to do hack the hack...
    > >> > > I believe the proper solution here is to use erase regions
    > >> > > functionality, I send and RFS about that some time ago.
    > >> >
    > >> > Do you mind to send me a link for reference?
    > >> >
    > >> Han,
    > >>
    > >> Sorry, It seem I have not posted erase region changes (only those
    > >> regarding DUAL/QUAD I/O).
    > >> Generally, in this flash you need to create 3 erase regions (because
    > >> in FS-S family support only 4KiB erase on parameters sector - eg. 1.2.2.4 in
    > S25FS512S).
    > >> In my case regions are:
    > >> 1. 0-32KiB (8*4KiB) - 4K_ERASE (0x20/0x21) 2. 32 - 256 - SE_CMD (0xd8/0xdc)
    > 3.
    > >> Rest of the flash SE_CMD (0xd8/0xdc)
    > >>
    > >> To erase whole flash you can also use CHIP_ERASE_CMD (0x60/0xC7)
    > >> command, you just need to add one more mtd partition that will cover
    > whole flash.
    > >>
    > >
    > > Hi Krzeminski,
    > >
    > > Do you think is there any great advantages for enable 4KB?
    > > Because for NXP(Freescale) QSPI controller, there is only support max to 16
    > groups command.
    >
    > If it's really necessary to support all command groups, you can try apply my
    > dynamic lut patch first.
    > https://patchwork.ozlabs.org/patch/676791/
    >

    I think it will be helpful, I will test and check it.

    Thanks,
    \
     
     \ /
      Last update: 2016-11-22 02:05    [W:3.673 / U:0.940 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site