Re: [PATCH v3 2/8] m25p80: Add the n25q256a SFDP table

[Francisco Iglesias]

On [2022 Jul 22] Fri 08:35:56, Cédric Le Goater wrote:
> The same values were collected on 4 differents OpenPower systems,
> palmettos, romulus and tacoma.
> 
> The SFDP table size is defined as being 0x100 bytes but it could be
> bigger. Only the mandatory table for basic features is available at
> byte 0x30.
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>  hw/block/m25p80_sfdp.h |  2 ++
>  hw/block/m25p80.c      |  8 +++---
>  hw/block/m25p80_sfdp.c | 58 ++++++++++++++++++++++++++++++++++++++++++
>  hw/block/meson.build   |  1 +
>  4 files changed, 66 insertions(+), 3 deletions(-)
>  create mode 100644 hw/block/m25p80_sfdp.c
> 
> diff --git a/hw/block/m25p80_sfdp.h b/hw/block/m25p80_sfdp.h
> index 230b07ef3308..d3a0a778ae84 100644
> --- a/hw/block/m25p80_sfdp.h
> +++ b/hw/block/m25p80_sfdp.h
> @@ -15,4 +15,6 @@
>   */
>  #define M25P80_SFDP_MAX_SIZE  (1 << 24)
>  
> +extern uint8_t m25p80_sfdp_n25q256a(uint32_t addr);

(-extern above if we would like)


> +
>  #endif
> diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
> index abdc4c0b0da7..13e7b28fd2b0 100644
> --- a/hw/block/m25p80.c
> +++ b/hw/block/m25p80.c
> @@ -247,13 +247,15 @@ static const FlashPartInfo known_devices[] = {
>      { INFO("n25q128a11",  0x20bb18,      0,  64 << 10, 256, ER_4K) },
>      { INFO("n25q128a13",  0x20ba18,      0,  64 << 10, 256, ER_4K) },
>      { INFO("n25q256a11",  0x20bb19,      0,  64 << 10, 512, ER_4K) },
> -    { INFO("n25q256a13",  0x20ba19,      0,  64 << 10, 512, ER_4K) },
> +    { INFO("n25q256a13",  0x20ba19,      0,  64 << 10, 512, ER_4K),
> +      .sfdp_read = m25p80_sfdp_n25q256a },
>      { INFO("n25q512a11",  0x20bb20,      0,  64 << 10, 1024, ER_4K) },
>      { INFO("n25q512a13",  0x20ba20,      0,  64 << 10, 1024, ER_4K) },
>      { INFO("n25q128",     0x20ba18,      0,  64 << 10, 256, 0) },
>      { INFO("n25q256a",    0x20ba19,      0,  64 << 10, 512,
> -           ER_4K | HAS_SR_BP3_BIT6 | HAS_SR_TB) },
> -    { INFO("n25q512a",    0x20ba20,      0,  64 << 10, 1024, ER_4K) },
> +           ER_4K | HAS_SR_BP3_BIT6 | HAS_SR_TB),
> +      .sfdp_read = m25p80_sfdp_n25q256a },
> +   { INFO("n25q512a",    0x20ba20,      0,  64 << 10, 1024, ER_4K) },
>      { INFO("n25q512ax3",  0x20ba20,  0x1000,  64 << 10, 1024, ER_4K) },
>      { INFO("mt25ql512ab", 0x20ba20, 0x1044, 64 << 10, 1024, ER_4K | ER_32K) 
> },
>      { INFO_STACKED("mt35xu01g", 0x2c5b1b, 0x104100, 128 << 10, 1024,
> diff --git a/hw/block/m25p80_sfdp.c b/hw/block/m25p80_sfdp.c
> new file mode 100644
> index 000000000000..24ec05de79a1
> --- /dev/null
> +++ b/hw/block/m25p80_sfdp.c
> @@ -0,0 +1,58 @@
> +/*
> + * M25P80 Serial Flash Discoverable Parameter (SFDP)
> + *
> + * Copyright (c) 2020, IBM Corporation.
> + *
> + * This code is licensed under the GPL version 2 or later. See the
> + * COPYING file in the top-level directory.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu/host-utils.h"
> +#include "m25p80_sfdp.h"
> +
> +#define define_sfdp_read(model)                                       \
> +    uint8_t m25p80_sfdp_##model(uint32_t addr)                        \
> +    {                                                                 \
> +        assert(is_power_of_2(sizeof(sfdp_##model)));                  \
> +        return sfdp_##model[addr & (sizeof(sfdp_##model) - 1)];       \
> +    }
> +
> +/*
> + * Micron
> + */
> +static const uint8_t sfdp_n25q256a[] = {

The datasheets I found wasn't completetly as this table but I can't argue
with the hw read out of 4 flashes.

Reviewed-by: Francisco Iglesias <frasse.iglesias@gmail.com>

> +    0x53, 0x46, 0x44, 0x50, 0x00, 0x01, 0x00, 0xff,
> +    0x00, 0x00, 0x01, 0x09, 0x30, 0x00, 0x00, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xe5, 0x20, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x0f,
> +    0x29, 0xeb, 0x27, 0x6b, 0x08, 0x3b, 0x27, 0xbb,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x27, 0xbb,
> +    0xff, 0xff, 0x29, 0xeb, 0x0c, 0x20, 0x10, 0xd8,
> +    0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +    0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
> +};
> +define_sfdp_read(n25q256a);
> diff --git a/hw/block/meson.build b/hw/block/meson.build
> index 2389326112ae..3129ca4c52eb 100644
> --- a/hw/block/meson.build
> +++ b/hw/block/meson.build
> @@ -12,6 +12,7 @@ softmmu_ss.add(when: 'CONFIG_ONENAND', if_true: 
> files('onenand.c'))
>  softmmu_ss.add(when: 'CONFIG_PFLASH_CFI01', if_true: files('pflash_cfi01.c'))
>  softmmu_ss.add(when: 'CONFIG_PFLASH_CFI02', if_true: files('pflash_cfi02.c'))
>  softmmu_ss.add(when: 'CONFIG_SSI_M25P80', if_true: files('m25p80.c'))
> +softmmu_ss.add(when: 'CONFIG_SSI_M25P80', if_true: files('m25p80_sfdp.c'))
>  softmmu_ss.add(when: 'CONFIG_SWIM', if_true: files('swim.c'))
>  softmmu_ss.add(when: 'CONFIG_XEN', if_true: files('xen-block.c'))
>  softmmu_ss.add(when: 'CONFIG_TC58128', if_true: files('tc58128.c'))
> -- 
> 2.35.3
>