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Message-ID: <50FFA692.2060907@parrot.com>
Date: Wed, 23 Jan 2013 10:00:02 +0100
From: Matthieu CASTET <matthieu.castet@...rot.com>
To: Tony Prisk <linux@...sktech.co.nz>
CC: "dwmw2@...radead.org" <dwmw2@...radead.org>,
"dedekind1@...il.com" <dedekind1@...il.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
"vt8500-wm8505-linux-kernel@...glegroups.com"
<vt8500-wm8505-linux-kernel@...glegroups.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 1/2] mtd: Add a common JEDEC flash device table
Tony Prisk a écrit :
> This patch adds a common JEDEC flash device table which can be
> expanded on as more features are required.
>
> A simple match function is also included to query the table for
> a match based on the JEDEC id.
Why don't you use id from include/linux/mtd/cfi.h that is used by flash driver
like drivers/mtd/devices/m25p80.c ?
#define CFI_MFR_AMD 0x0001
#define CFI_MFR_AMIC 0x0037
#define CFI_MFR_ATMEL 0x001F
#define CFI_MFR_EON 0x001C
#define CFI_MFR_FUJITSU 0x0004
#define CFI_MFR_HYUNDAI 0x00AD
#define CFI_MFR_INTEL 0x0089
#define CFI_MFR_MACRONIX 0x00C2
#define CFI_MFR_NEC 0x0010
#define CFI_MFR_PMC 0x009D
#define CFI_MFR_SAMSUNG 0x00EC
#define CFI_MFR_SHARP 0x00B0
#define CFI_MFR_SST 0x00BF
#define CFI_MFR_ST 0x0020 /* STMicroelectronics */
#define CFI_MFR_TOSHIBA 0x0098
#define CFI_MFR_WINBOND 0x00DA
>
> Signed-off-by: Tony Prisk <linux@...sktech.co.nz>
> ---
> drivers/mtd/devices/flash_jedec.c | 96 +++++++++++++++++++++++++++++++++++++
> drivers/mtd/devices/flash_jedec.h | 30 ++++++++++++
> 2 files changed, 126 insertions(+)
> create mode 100644 drivers/mtd/devices/flash_jedec.c
> create mode 100644 drivers/mtd/devices/flash_jedec.h
>
> diff --git a/drivers/mtd/devices/flash_jedec.c b/drivers/mtd/devices/flash_jedec.c
> new file mode 100644
> index 0000000..c0b2272
> --- /dev/null
> +++ b/drivers/mtd/devices/flash_jedec.c
> @@ -0,0 +1,96 @@
> +/*
> + * Copyright Tony Prisk <linux@...sktech.co.nz>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#include <linux/bug.h>
> +#include <linux/err.h>
> +#include <linux/kernel.h>
> +#include <linux/types.h>
> +
> +#include "flash_jedec.h"
> +
> +/*
> + * Device Manufacturer IDs
> + * Please keep sorted by manufacturer ID
> + */
> +#define MFR_SPANSION 0X01
> +#define MFR_EON 0X1C
> +#define MFR_ATMEL 0X1F
> +#define MFR_MICRON 0X20 /* Also Numonyx & STM */
> +#define MFR_INTEL 0x89
> +#define MFR_FUDAN 0XA1
> +#define MFR_SST 0XBF
> +#define MFR_MXIC 0XC2
> +#define MFR_WINBOND 0XEF
> +
> +#define _ID(m, d) ((m << 16) | d)
> +
> +/*
> + * Flash device information
> + * Please keep sorted by manufacturer id, then device id
> + */
> +static struct flash_device_info flash_devices[] = {
> + /* Spansion */
> + { "s25fl016", _ID(MFR_SPANSION, 0x0214), 2048 },
> + { "s25fl064", _ID(MFR_SPANSION, 0x0216), 8192 },
> + /* EON */
> + { "en25p16", _ID(MFR_EON, 0x2015), 2048 },
> + { "en25p64", _ID(MFR_EON, 0x2017), 8192 },
> + { "en25f40", _ID(MFR_EON, 0x3113), 512 },
> + { "en25f16", _ID(MFR_EON, 0x3115), 2048 },
> + /* ATMEL */
> + { "at25df041a", _ID(MFR_ATMEL, 0x4401), 512 },
> + /* Micron, STM & Numonyx */
> + { "stm25p16", _ID(MFR_MICRON, 0x2015), 2048 },
> + { "stm25p64", _ID(MFR_MICRON, 0x2017), 8192 },
> + /* Fudan */
> + { "fm25f04", _ID(MFR_FUDAN, 0x3113), 512 },
> + /* SST */
> + { "sst25vf016b", _ID(MFR_SST, 0x2541), 2048 },
> + /* Macronix - MXIC */
> + { "mx25l512", _ID(MFR_MXIC, 0x2010), 64 },
> + { "mx25l4005", _ID(MFR_MXIC, 0x2013), 512 },
> + { "mx25l1605", _ID(MFR_MXIC, 0x2015), 2048 },
> + { "mx25l3205", _ID(MFR_MXIC, 0x2016), 4096 },
> + { "mx25l6405", _ID(MFR_MXIC, 0x2017), 8192 },
> + { "mx25l12805", _ID(MFR_MXIC, 0x2018), 16384 },
> + { "mx25l1635", _ID(MFR_MXIC, 0x2415), 2048 },
> + { "mx25l3235", _ID(MFR_MXIC, 0x5E16), 4096 },
> + /* Winbond */
> + { "w25x40", _ID(MFR_WINBOND, 0x3013), 512 },
> + { "w25x16", _ID(MFR_WINBOND, 0x3015), 2048 },
> + { "w25x32", _ID(MFR_WINBOND, 0x3016), 4096 },
> + { "w25x64", _ID(MFR_WINBOND, 0x3017), 8192 },
> +};
> +
> +/*
> + * jedec_match_device - match a jedec id against the flash_devices table
> + * @jedecid: JEDEC formatted id to match
> + * bits 16..24: manufacturer id
> + * bits 0..15: device id
> + * Returns a valid flash_device_info* or ERR_PTR(-ENODEV) if an entry is
> + * not found
> + */
> +struct flash_device_info *jedec_match_device(u32 jedec_id)
> +{
> + int i;
> + for (i = 0; i < ARRAY_SIZE(flash_devices); i++)
> + if (flash_devices[i].jedec_id == jedec_id)
> + return &flash_devices[i];
> +
> + return ERR_PTR(-ENODEV);
> +}
> diff --git a/drivers/mtd/devices/flash_jedec.h b/drivers/mtd/devices/flash_jedec.h
> new file mode 100644
> index 0000000..27b978a
> --- /dev/null
> +++ b/drivers/mtd/devices/flash_jedec.h
> @@ -0,0 +1,30 @@
> +/*
> + * Copyright Tony Prisk <linux@...sktech.co.nz>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + */
> +
> +#ifndef __MTD_FLASH_JEDEC
> +#define __MTD_FLASH_JEDEC
> +
> +struct flash_device_info {
> + const char *name;
> + u32 jedec_id;
> + u32 size_kb;
> +};
> +
> +extern struct flash_device_info *jedec_match_device(u32 jedec_id);
> +
> +#endif
--
Matthieu Castet
Ingénieur Développement Logiciel
Parrot SA
174 Quai de Jemmapes
75010 Paris, France
Tél: +33 (0) 1 48 03 74 78
Fax: +33 (0) 1 48 03 06 66
Email: matthieu.castet@...rot.fr
http://www.parrot.biz
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