From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D4B7C28EBD for ; Sun, 9 Jun 2019 10:32:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C9B52080C for ; Sun, 9 Jun 2019 10:32:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="DpySRNg9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728217AbfFIKc2 (ORCPT ); Sun, 9 Jun 2019 06:32:28 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:37048 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727853AbfFIKcZ (ORCPT ); Sun, 9 Jun 2019 06:32:25 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id x59AVptH056731; Sun, 9 Jun 2019 05:31:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1560076311; bh=bhf1NnC4v0L9mSFxunRdPIHPTAIDYrhcmMkuEkkylxM=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=DpySRNg93tW2CkhUN1FDLag9UYAVmXlwYyBvxKeFeE2xlciiD6edauRRgxl+9IGKx GvF9RpH2xomzyLhDJCyy01gbTyRvoeQTK1OAFk6rXQJ3K0m2kemcLgEvTN66mY+8Xh PQjO4QOOGTbyN9ZAldXFHZJL8ZsOPfts+MpMArYA= Received: from DLEE110.ent.ti.com (dlee110.ent.ti.com [157.170.170.21]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id x59AVp4O078858 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 9 Jun 2019 05:31:51 -0500 Received: from DLEE110.ent.ti.com (157.170.170.21) by DLEE110.ent.ti.com (157.170.170.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5; Sun, 9 Jun 2019 05:31:49 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DLEE110.ent.ti.com (157.170.170.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1713.5 via Frontend Transport; Sun, 9 Jun 2019 05:31:49 -0500 Received: from a0132425.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id x59AVe1e049269; Sun, 9 Jun 2019 05:31:45 -0500 From: Vignesh Raghavendra To: Vignesh Raghavendra , David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Rob Herring CC: , Tudor Ambarus , Miquel Raynal , Joakim Tjernlund , , Sergei Shtylyov , Mason Yang , , Subject: [PATCH v5 1/5] mtd: cfi_cmdset_0002: Add support for polling status register Date: Sun, 9 Jun 2019 16:02:23 +0530 Message-ID: <20190609103227.24875-2-vigneshr@ti.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190609103227.24875-1-vigneshr@ti.com> References: <20190609103227.24875-1-vigneshr@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org HyperFlash devices are compliant with CFI AMD/Fujitsu Extended Command Set (0x0002) for flash operations, therefore drivers/mtd/chips/cfi_cmdset_0002.c can be used as is. But these devices do not support DQ polling method of determining chip ready/good status. These flashes provide Status Register whose bits can be polled to know status of flash operation. Cypress HyperFlash datasheet here[1], talks about CFI Amd/Fujitsu Extended Query version 1.5. Bit 0 of "Software Features supported" field of CFI Primary Vendor-Specific Extended Query table indicates presence/absence of status register and Bit 1 indicates whether or not DQ polling is supported. Using these bits, its possible to determine whether flash supports DQ polling or need to use Status Register. Add support for polling Status Register to know device ready/status of erase/write operations when DQ polling is not supported. Print error messages on erase/program failure by looking at related Status Register bits. [1] https://www.cypress.com/file/213346/download Signed-off-by: Vignesh Raghavendra --- v5: No change drivers/mtd/chips/cfi_cmdset_0002.c | 90 +++++++++++++++++++++++++++++ include/linux/mtd/cfi.h | 5 ++ 2 files changed, 95 insertions(+) diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c index c8fa5906bdf9..0f571f162e3b 100644 --- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -49,6 +49,16 @@ #define SST49LF008A 0x005a #define AT49BV6416 0x00d6 +/* + * Status Register bit description. Used by flash devices that don't + * support DQ polling (e.g. HyperFlash) + */ +#define CFI_SR_DRB BIT(7) +#define CFI_SR_ESB BIT(5) +#define CFI_SR_PSB BIT(4) +#define CFI_SR_WBASB BIT(3) +#define CFI_SR_SLSB BIT(1) + static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *); static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *); @@ -97,6 +107,48 @@ static struct mtd_chip_driver cfi_amdstd_chipdrv = { .module = THIS_MODULE }; +/* + * Use status register to poll for Erase/write completion when DQ is not + * supported. This is indicated by Bit[1:0] of SoftwareFeatures field in + * CFI Primary Vendor-Specific Extended Query table 1.5 + */ +static int cfi_use_status_reg(struct cfi_private *cfi) +{ + struct cfi_pri_amdstd *extp = cfi->cmdset_priv; + + return extp->MinorVersion >= '5' && + (extp->SoftwareFeatures & 0x3) == 0x1; +} + +static void cfi_check_err_status(struct map_info *map, unsigned long adr) +{ + struct cfi_private *cfi = map->fldrv_priv; + map_word status; + + if (!cfi_use_status_reg(cfi)) + return; + + cfi_send_gen_cmd(0x70, cfi->addr_unlock1, 0, map, cfi, + cfi->device_type, NULL); + status = map_read(map, adr); + + if (map_word_bitsset(map, status, CMD(0x3a))) { + unsigned long chipstatus = MERGESTATUS(status); + + if (chipstatus & CFI_SR_ESB) + pr_err("%s erase operation failed, status %lx\n", + map->name, chipstatus); + if (chipstatus & CFI_SR_PSB) + pr_err("%s program operation failed, status %lx\n", + map->name, chipstatus); + if (chipstatus & CFI_SR_WBASB) + pr_err("%s buffer program command aborted, status %lx\n", + map->name, chipstatus); + if (chipstatus & CFI_SR_SLSB) + pr_err("%s sector write protected, status %lx\n", + map->name, chipstatus); + } +} /* #define DEBUG_CFI_FEATURES */ @@ -744,8 +796,22 @@ static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd) */ static int __xipram chip_ready(struct map_info *map, unsigned long addr) { + struct cfi_private *cfi = map->fldrv_priv; map_word d, t; + if (cfi_use_status_reg(cfi)) { + map_word ready = CMD(CFI_SR_DRB); + /* + * For chips that support status register, check device + * ready bit + */ + cfi_send_gen_cmd(0x70, cfi->addr_unlock1, 0, map, cfi, + cfi->device_type, NULL); + d = map_read(map, addr); + + return map_word_andequal(map, d, ready, ready); + } + d = map_read(map, addr); t = map_read(map, addr); @@ -769,8 +835,27 @@ static int __xipram chip_ready(struct map_info *map, unsigned long addr) */ static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected) { + struct cfi_private *cfi = map->fldrv_priv; map_word oldd, curd; + if (cfi_use_status_reg(cfi)) { + map_word ready = CMD(CFI_SR_DRB); + map_word err = CMD(CFI_SR_PSB | CFI_SR_ESB); + /* + * For chips that support status register, check device + * ready bit and Erase/Program status bit to know if + * operation succeeded. + */ + cfi_send_gen_cmd(0x70, cfi->addr_unlock1, 0, map, cfi, + cfi->device_type, NULL); + curd = map_read(map, addr); + + if (map_word_andequal(map, curd, ready, ready)) + return !map_word_bitsset(map, curd, err); + + return 0; + } + oldd = map_read(map, addr); curd = map_read(map, addr); @@ -1644,6 +1729,7 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, /* Did we succeed? */ if (!chip_good(map, adr, datum)) { /* reset on all failures. */ + cfi_check_err_status(map, adr); map_write(map, CMD(0xF0), chip->start); /* FIXME - should have reset delay before continuing */ @@ -1901,6 +1987,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, * See e.g. * http://www.spansion.com/Support/Application%20Notes/MirrorBit_Write_Buffer_Prog_Page_Buffer_Read_AN.pdf */ + cfi_check_err_status(map, adr); cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL); cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, @@ -2107,6 +2194,7 @@ static int do_panic_write_oneword(struct map_info *map, struct flchip *chip, if (!chip_good(map, adr, datum)) { /* reset on all failures. */ + cfi_check_err_status(map, adr); map_write(map, CMD(0xF0), chip->start); /* FIXME - should have reset delay before continuing */ @@ -2316,6 +2404,7 @@ static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip) /* Did we succeed? */ if (ret) { /* reset on all failures. */ + cfi_check_err_status(map, adr); map_write(map, CMD(0xF0), chip->start); /* FIXME - should have reset delay before continuing */ @@ -2412,6 +2501,7 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, /* Did we succeed? */ if (ret) { /* reset on all failures. */ + cfi_check_err_status(map, adr); map_write(map, CMD(0xF0), chip->start); /* FIXME - should have reset delay before continuing */ diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h index 208c87cf2e3e..b50416169049 100644 --- a/include/linux/mtd/cfi.h +++ b/include/linux/mtd/cfi.h @@ -219,6 +219,11 @@ struct cfi_pri_amdstd { uint8_t VppMin; uint8_t VppMax; uint8_t TopBottom; + /* Below field are added from version 1.5 */ + uint8_t ProgramSuspend; + uint8_t UnlockBypass; + uint8_t SecureSiliconSector; + uint8_t SoftwareFeatures; } __packed; /* Vendor-Specific PRI for Atmel chips (command set 0x0002) */ -- 2.21.0