Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753756Ab0AHPKc (ORCPT ); Fri, 8 Jan 2010 10:10:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753640Ab0AHPKa (ORCPT ); Fri, 8 Jan 2010 10:10:30 -0500 Received: from mail-fx0-f225.google.com ([209.85.220.225]:38852 "EHLO mail-fx0-f225.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753646Ab0AHPK3 (ORCPT ); Fri, 8 Jan 2010 10:10:29 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:in-reply-to:references:content-type:date :message-id:mime-version:x-mailer:content-transfer-encoding; b=s8LH5TlRRcRzzblqVdUHx/LuoaoUSoxh5ndQr5nAB9sXH+rSizIODd+bmq5Ua27Jaw O+KdH3Q8VkQXCridUO5dV41X0LKdckxaAD1NVzuPXz7m2gaUPvyO3OnTdJ9ab+LLIePc h4HyHo7y7hFiZn6VsU4KC8qm1smLHUr/cINCY= Subject: [PATCH 7/9] MTD: add few workarounds to nand system for SmartMedia/xD chips. From: Maxim Levitsky To: linux-kernel Cc: linux-mtd , Alex Dubov , joern In-Reply-To: <1262963092.12577.14.camel@maxim-laptop> References: <1262963092.12577.14.camel@maxim-laptop> Content-Type: text/plain; charset="UTF-8" Date: Fri, 08 Jan 2010 17:10:24 +0200 Message-ID: <1262963424.12577.21.camel@maxim-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6572 Lines: 188 >From 4ade18c0eff30b0a5aa7360651448ec4efff761f Mon Sep 17 00:00:00 2001 From: Maxim Levitsky Date: Fri, 8 Jan 2010 16:03:10 +0200 Subject: [PATCH 7/9] MTD: add few workarounds to nand system for SmartMedia/xD chips. * Add an option NAND_SMARTMEDIA that can be set by nand driver If set, it will cause separate ID table to be used, which includes mask rom devices and new xD cards * Workaround for wrong write protect status on some xD cards Signed-off-by: Maxim Levitsky --- drivers/mtd/nand/nand_base.c | 29 +++++++++++++++++++++-------- drivers/mtd/nand/nand_ids.c | 38 ++++++++++++++++++++++++++++++++++++++ drivers/mtd/sm_common.c | 2 +- include/linux/mtd/nand.h | 11 +++++++++++ 4 files changed, 71 insertions(+), 9 deletions(-) diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 8e31245..a4a9284 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -398,9 +398,17 @@ static int nand_default_block_markbad(struct mtd_info *mtd, loff_t ofs) static int nand_check_wp(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; + int wp; + /* Check the WP bit */ chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); - return (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; + wp = (chip->read_byte(mtd) & NAND_STATUS_WP) ? 0 : 1; + + /* broken xD cards report WP despite beeing writable */ + if (chip->options & NAND_BROKEN_XD) + return 0; + + return wp; } /** @@ -2624,14 +2632,18 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd, } /* Lookup the flash id */ - for (i = 0; nand_flash_ids[i].name != NULL; i++) { - if (dev_id == nand_flash_ids[i].id) { - type = &nand_flash_ids[i]; +#ifdef CONFIG_MTD_NAND_SMARTMEDIA + if (chip->options & NAND_SMARTMEDIA) + type = nand_smartmedia_flash_ids; + else +#endif + type = nand_flash_ids; + + for (i = 0; type->name != NULL; type++) + if (dev_id == type->id) break; - } - } - if (!type) + if (!type->name) return ERR_PTR(-ENODEV); if (!mtd->name) @@ -2988,7 +3000,8 @@ int nand_scan_tail(struct mtd_info *mtd) /* Fill in remaining MTD driver data */ mtd->type = MTD_NANDFLASH; - mtd->flags = MTD_CAP_NANDFLASH; + mtd->flags = chip->options & NAND_ROM ? MTD_CAP_ROM : + MTD_CAP_NANDFLASH; mtd->erase = nand_erase; mtd->point = NULL; mtd->unpoint = NULL; diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c index 69ee2c9..7ac7538 100644 --- a/drivers/mtd/nand/nand_ids.c +++ b/drivers/mtd/nand/nand_ids.c @@ -127,6 +127,44 @@ struct nand_flash_dev nand_flash_ids[] = { {NULL,} }; +#ifdef CONFIG_MTD_NAND_SMARTMEDIA +struct nand_flash_dev nand_smartmedia_flash_ids[] = { + + /* SmartMedia */ + {"SmartMedia 1MiB 5V", 0x6e, 256, 1, 0x1000, 0}, + {"SmartMedia 1MiB 3,3V", 0xe8, 256, 1, 0x1000, 0}, + {"SmartMedia 1MiB 3,3V", 0xec, 256, 1, 0x1000, 0}, + {"SmartMedia 2MiB 3,3V", 0xea, 256, 2, 0x1000, 0}, + {"SmartMedia 2MiB 5V", 0x64, 256, 2, 0x1000, 0}, + {"SmartMedia 2MiB 3,3V ROM", 0x5d, 512, 2, 0x2000, NAND_ROM}, + {"SmartMedia 4MiB 3,3V", 0xe3, 512, 4, 0x2000, 0}, + {"SmartMedia 4MiB 3,3/5V", 0xe5, 512, 4, 0x2000, 0}, + {"SmartMedia 4MiB 5V", 0x6b, 512, 4, 0x2000, 0}, + {"SmartMedia 4MiB 3,3V ROM", 0xd5, 512, 4, 0x2000, NAND_ROM}, + {"SmartMedia 8MiB 3,3V", 0xe6, 512, 8, 0x2000, 0}, + {"SmartMedia 8MiB 3,3V ROM", 0xd6, 512, 8, 0x2000, NAND_ROM}, + + /* xD / SmartMedia */ + {"SmartMedia/xD 16MiB 3,3V", 0x73, 512, 16, 0x4000, 0}, + {"SmartMedia 16MiB 3,3V ROM", 0x57, 512, 16, 0x4000, NAND_ROM}, + {"SmartMedia/xD 32MiB 3,3V", 0x75, 512, 32, 0x4000, 0}, + {"SmartMedia 32MiB 3,3V ROM", 0x58, 512, 32, 0x4000, NAND_ROM}, + {"SmartMedia/xD 64MiB 3,3V", 0x76, 512, 64, 0x4000, 0}, + {"SmartMedia 64MiB 3,3V ROM", 0xd9, 512, 64, 0x4000, NAND_ROM}, + {"SmartMedia/xD 128MiB 3,3V", 0x79, 512, 128, 0x4000, 0}, + {"SmartMedia 128MiB 3,3V ROM", 0xda, 512, 128, 0x4000, NAND_ROM}, + {"SmartMedia/xD 256MiB 3,3V", 0x71, 512, 256, 0x4000, NAND_BROKEN_XD}, + {"SmartMedia 256MiB 3,3V ROM", 0x5b, 512, 256, 0x4000, NAND_ROM}, + + /* xD only */ + {"xD 512MiB 3,3V", 0xDC, 512, 512, 0x4000, NAND_BROKEN_XD}, + {"xD 1GiB 3,3V", 0xD3, 512, 1024, 0x4000, NAND_BROKEN_XD}, + {"xD 2GiB 3,3V", 0xD5, 512, 2048, 0x4000, NAND_BROKEN_XD}, + {NULL,} +}; +EXPORT_SYMBOL(nand_smartmedia_flash_ids); +#endif + /* * Manufacturer ID list */ diff --git a/drivers/mtd/sm_common.c b/drivers/mtd/sm_common.c index 45b577f..6234482 100644 --- a/drivers/mtd/sm_common.c +++ b/drivers/mtd/sm_common.c @@ -186,7 +186,7 @@ int sm_register_device(struct mtd_info *mtd) struct nand_chip *chip = (struct nand_chip *)mtd->priv; int ret; - chip->options |= NAND_SKIP_BBTSCAN | NAND_NO_AUTOINCR; + chip->options |= NAND_SKIP_BBTSCAN | NAND_SMARTMEDIA | NAND_NO_AUTOINCR; /* Scan for card properties */ ret = nand_scan_ident(mtd, 1); diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index 75575fb..a3670c1 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -170,6 +170,12 @@ typedef enum { /* Chip does not allow subpage writes */ #define NAND_NO_SUBPAGE_WRITE 0x00000200 +/* Device is one of 'new' xD cards that expose fake nand command set */ +#define NAND_BROKEN_XD 0x00000400 + +/* Device behaves just like nand, but is readonly */ +#define NAND_ROM 0x00000800 + /* Options valid for Samsung large page devices */ #define NAND_SAMSUNG_LP_OPTIONS \ (NAND_NO_PADDING | NAND_CACHEPRG | NAND_COPYBACK) @@ -195,9 +201,13 @@ typedef enum { /* This option is defined if the board driver allocates its own buffers (e.g. because it needs them DMA-coherent */ #define NAND_OWN_BUFFERS 0x00040000 + /* Chip may not exist, so silence any errors in scan */ #define NAND_SCAN_SILENT_NODEV 0x00080000 +/* controller supports only xD/SmartMedia cards*/ +#define NAND_SMARTMEDIA 0x00100000 + /* Options set by nand scan */ /* Nand scan has allocated controller struct */ #define NAND_CONTROLLER_ALLOC 0x80000000 @@ -458,6 +468,7 @@ struct nand_manufacturers { }; extern struct nand_flash_dev nand_flash_ids[]; +extern struct nand_flash_dev nand_smartmedia_flash_ids[]; extern struct nand_manufacturers nand_manuf_ids[]; extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/