From patchwork Sat Aug 17 23:44:15 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luka Perkov X-Patchwork-Id: 268019 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from casper.infradead.org (unknown [IPv6:2001:770:15f::2]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 4C5062C013C for ; Sun, 18 Aug 2013 09:45:59 +1000 (EST) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VAqBb-00042P-Rb; Sat, 17 Aug 2013 23:45:36 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VAqBa-0004KB-3h; Sat, 17 Aug 2013 23:45:34 +0000 Received: from arrakis.dune.hu ([78.24.191.176]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VAqBW-0004Js-5Q for linux-mtd@lists.infradead.org; Sat, 17 Aug 2013 23:45:31 +0000 Received: from localhost (localhost [127.0.0.1]) by arrakis.dune.hu (Postfix) with ESMTP id 89F002890E7; Sun, 18 Aug 2013 01:44:26 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on arrakis.dune.hu X-Spam-Level: X-Spam-Status: No, score=-2.5 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.3.2 X-Virus-Scanned: at arrakis.dune.hu Received: from localhost.localdomain (78-3-30-24.adsl.net.t-com.hr [78.3.30.24]) by arrakis.dune.hu (Postfix) with ESMTPSA id 39603284502; Sun, 18 Aug 2013 01:44:25 +0200 (CEST) From: Luka Perkov To: linux-mtd@lists.infradead.org Subject: [PATCH v2] mtd: m25p80: add support for PMC SPI flash Date: Sun, 18 Aug 2013 01:44:15 +0200 Message-Id: <1376783055-18370-1-git-send-email-luka@openwrt.org> X-Mailer: git-send-email 1.8.3.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130817_194530_481597_E621CB3F X-CRM114-Status: GOOD ( 15.21 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Luka Perkov , Gabor Juhos , Brian Norris , Michel Stempin , Artem Bityutskiy X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org From: Michel Stempin This patch adds support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 kBbit), Pm25LV010 (1 Mbit) and Pm25LQ032 (32 Mbit) SPI flash. Two generations of PMC SPI flash chips are addressed: 1) Pm25LV512 and Pm25LV010 - These have 4KB sectors and 32KB blocks. The 4KB sector erase uses a non-standard opcode (0xd7). They do not support JEDEC RDID (0x9f), and so they can only be detected by matching their name string with pre-configured platform data. Because of the cascaded acquisitions, the datasheet is no longer available on the current manufacturer's website, although it is still commonly used in some recent wireless routers [1]. Only public datasheet available seems to be on GeoCities [2]. 2) Pm25LQ032 - A newer generation flash, with 4KB sectors and 32KB blocks. It uses the standard erase and JEDEC read-ID opcodes. Manufacturer's datasheet is available [3]. [1] https://forum.openwrt.org/viewtopic.php?pid=186360#p186360 [2] http://www.geocities.jp/scottle556/pdf/Pm25LV512-010.pdf [3] http://www.chingistek.com/img/Product_Files/Pm25LQ032C%20datasheet%20v1.6.1.pdf Signed-off-by: Gabor Juhos Signed-off-by: Michel Stempin CC: Brian Norris CC: Artem Bityutskiy --- Changes in v2: - style and documentation improvements drivers/mtd/devices/m25p80.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 2f3d2a5..4d45ce4 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -45,6 +45,7 @@ #define OPCODE_BE_4K 0x20 /* Erase 4KiB block */ #define OPCODE_BE_32K 0x52 /* Erase 32KiB block */ #define OPCODE_CHIP_ERASE 0xc7 /* Erase whole flash chip */ +#define OPCODE_BE_4K_PMC 0xd7 /* Erase 4KiB block on PMC chips*/ #define OPCODE_SE 0xd8 /* Sector erase (usually 64KiB) */ #define OPCODE_RDID 0x9f /* Read JEDEC ID */ @@ -682,6 +683,7 @@ struct flash_info { #define SECT_4K 0x01 /* OPCODE_BE_4K works uniformly */ #define M25P_NO_ERASE 0x02 /* No erase command needed */ #define SST_WRITE 0x04 /* use SST byte programming */ +#define SECT_4K_PMC 0x08 /* OPCODE_BE_4K_PMC works uniformly */ }; #define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \ @@ -762,6 +764,11 @@ static const struct spi_device_id m25p_ids[] = { { "n25q128a13", INFO(0x20ba18, 0, 64 * 1024, 256, 0) }, { "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K) }, + /* PMC -- pm25x "blocks" are 32K, sectors are 4K */ + { "pm25lv512", INFO(0, 0, 32 * 1024, 2, SECT_4K_PMC) }, + { "pm25lv010", INFO(0, 0, 32 * 1024, 4, SECT_4K_PMC) }, + { "pm25lq032", INFO(0x7F9D46, 0, 64 * 1024, 64, SECT_4K) }, + /* Spansion -- single (large) sector size only, at least * for the chips listed here (without boot sectors). */ @@ -1014,6 +1021,9 @@ static int m25p_probe(struct spi_device *spi) if (info->flags & SECT_4K) { flash->erase_opcode = OPCODE_BE_4K; flash->mtd.erasesize = 4096; + } else if (info->flags & SECT_4K_PMC) { + flash->erase_opcode = OPCODE_BE_4K_PMC; + flash->mtd.erasesize = 4096; } else { flash->erase_opcode = OPCODE_SE; flash->mtd.erasesize = info->sector_size;