From patchwork Wed Feb 16 20:27:54 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Retanubun X-Patchwork-Id: 83399 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 5248EB70FD for ; Thu, 17 Feb 2011 07:28:43 +1100 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 6F029280D6; Wed, 16 Feb 2011 21:28:24 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dLGMQlIWemx1; Wed, 16 Feb 2011 21:28:24 +0100 (CET) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 2B74F280D8; Wed, 16 Feb 2011 21:28:18 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 6EB42280B4 for ; Wed, 16 Feb 2011 21:28:16 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qMnA6XDwjMo0 for ; Wed, 16 Feb 2011 21:28:15 +0100 (CET) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from mail2.ruggedcom.com (mail2.ruggedcom.com [204.50.148.11]) by theia.denx.de (Postfix) with ESMTPS id E190D280AD for ; Wed, 16 Feb 2011 21:28:11 +0100 (CET) Received: from rceng01.eng.lan (10.200.2.11) by RCexchangesvr1 (10.200.2.21) with Microsoft SMTP Server id 8.2.176.0; Wed, 16 Feb 2011 15:28:48 -0500 Received: from richardretanubun.eng.lan (unknown [10.200.19.10]) by rceng01.eng.lan (Postfix) with ESMTP id 4790B14E938; Wed, 16 Feb 2011 15:28:09 -0500 (EST) Received: from richardretanubun by richardretanubun.eng.lan with local (Exim 4.72) (envelope-from ) id 1Ppnyr-0002BI-6k; Wed, 16 Feb 2011 15:28:09 -0500 From: Richard Retanubun To: Date: Wed, 16 Feb 2011 15:27:54 -0500 Message-ID: <1297888074-8344-3-git-send-email-RichardRetanubun@RuggedCom.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <201102150434.39422.vapier@gentoo.org> References: <201102150434.39422.vapier@gentoo.org> MIME-Version: 1.0 Cc: mcmullan@netapp.com, Richard Retanubun Subject: [U-Boot] [PATCH 2/2] cmd_sf: Add handler for +len arg for erase command. X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.9 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de This patch adds [+]len handler for the erase command that will automatically round up the requested erase length to the flash's sector_size. --- common/cmd_sf.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++---- 1 files changed, 49 insertions(+), 4 deletions(-) diff --git a/common/cmd_sf.c b/common/cmd_sf.c index 6e7be81..bbd4842 100644 --- a/common/cmd_sf.c +++ b/common/cmd_sf.c @@ -19,6 +19,48 @@ static struct spi_flash *flash; + +/* + * This function computes the length argument for the erase command. + * The length on which the command is to operate can be given in two forms: + * 1. offset len - operate on <'offset', 'len') + * 2. offset +len - operate on <'offset', 'round_up(len)') + * If the second form is used and the length doesn't fall on the + * sector boundary, than it will be adjusted to the next sector boundary. + * If it isn't in the flash, the function will fail (return -1). + * Input: + * arg: length specification (i.e. both command arguments) + * Output: + * len: computed length for operation + * Return: + * 1: success + * -1: failure (bad format, bad address). +*/ +static int sf_parse_len_arg(char *arg, ulong *len) +{ + char *ep; + char round_up_len; /* indicates if the "+length" form used */ + ulong len_arg; + + + round_up_len = 0; + if (*arg == '+'){ + round_up_len = 1; + ++arg; + } + + len_arg = simple_strtoul(arg, &ep, 16); + if (ep == arg || *ep != '\0') + return -1; + + if (round_up_len && flash->sector_size > 0) + *len = DIV_ROUND_UP(len_arg, flash->sector_size); + else + *len = len_arg; + + return 1; +} + static int do_spi_flash_probe(int argc, char * const argv[]) { unsigned int bus = 0; @@ -135,9 +177,11 @@ static int do_spi_flash_erase(int argc, char * const argv[]) offset = simple_strtoul(argv[1], &endp, 16); if (*argv[1] == 0 || *endp != 0) goto usage; - len = simple_strtoul(argv[2], &endp, 16); - if (*argv[2] == 0 || *endp != 0) + + ret = sf_parse_len_arg(argv[2], &len); + if (ret != 1) { goto usage; + } ret = spi_flash_erase(flash, offset, len); if (ret) { @@ -148,7 +192,7 @@ static int do_spi_flash_erase(int argc, char * const argv[]) return 0; usage: - puts("Usage: sf erase offset len\n"); + puts("Usage: sf erase offset [+]len\n"); return 1; } @@ -189,5 +233,6 @@ U_BOOT_CMD( " `offset' to memory at `addr'\n" "sf write addr offset len - write `len' bytes from memory\n" " at `addr' to flash at `offset'\n" - "sf erase offset len - erase `len' bytes from `offset'" + "sf erase offset [+]len - erase `len' bytes from `offset'\n" + " `+len' round up `len' to block size" );