From patchwork Tue Dec 7 14:02:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 12695153 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2728EC433EF for ; Tue, 7 Dec 2021 14:25:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=asK+IdCJvD+o1OOS/OBJrjBoV4Hejm0vEWmB5iEhC3g=; b=qNYUlG516IAkr2 PpBQdJJz5OLUNDWTBJyZZPHxHt7g+SyYrpMVM6ZcmCNdum0RsEQizj5qkBUEcMHfrPzi2r86ryxRo ELUv0Pd2XjoN7TdQs2Qn8xjmjx5+7a1nftImkv/c2Z3wDMkJ+QDIEyrWpJ8BfZYbnyb7nGqpnw2oK f+CXCMDlmwaPwzcHqjFzUu97g2XHoNsIqPAEF/SPWvW4rKsN7C0aiuEGUV8EuLvGqE2zODtr1e7TI K9o+OPu8ZFBr7KkRQD+CUAb6yrD+9S4sUzp4PRkloFxeRVv0KU3DsKofBKcYmKLlPtwOyHKdjKATp U6jMkMMAutQkbdOSNc7w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mubNI-008up3-Bp; Tue, 07 Dec 2021 14:23:21 +0000 Received: from esa.microchip.iphmx.com ([68.232.154.123]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mub4O-008pCd-Ow; Tue, 07 Dec 2021 14:03:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1638885828; x=1670421828; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=sV/6UOPPHxo/EjAQJIce66kBYEn2ZLzBp3LvN0wHmYc=; b=kRyKR1fps0MP1rJCfZy/CblQvCencSOkBAxg5u6Rj3i3N5CLol1+MQqj jVTcPAcjTgvFvwoMT4Cqe/ewzGB4GBRA3nh+OIAbXrsnQ1uB2bf59ihq8 Y0u02FNCidBhH7nUUqdktIVoMvYJvhYHljWMOjBuV9BYCJg6uQUQ0/tjp 3hGeSDgjhMHvELQG1BA9RknZNrUsa6AP8G2Nyy4EWfoG3JDzitCI83zSn Ozd/sr/5e3x+yQ0AVFxrv6pVshRoS4HGfRSF2+u9gw8RXKJanl5wf5iPe 81hIAdXeQk/nlwmDMl0Z+v3VrN5p1frgeR4qHLBtEKkW3N0a5WPRuxEAa A==; IronPort-SDR: T0Az1+I1t57eEr5bqtBPr3ACe/+o8k1P5EzVQ9zPc4ng0cBR5GFuPBRycrQPDuiK0q2GPOgRsW SLwG4anrnfmUqreC0cI3MrKq1EqTWZv4bbFSlxdgdhKg3rZzOKNKIdQvvbVnXK/97d5RoQUtxs 9M+9ibV1LgJH6DQLYDkl60lymnaZsVClgUSyI3COtDNNiuPRhpqkBOjEHKRMujboEnZoHzv3eX V/l98bYzO/Tzp8PuCwRD/wiJzsX/bkrHEul6fBge2oLHedujqrd0GLuHeNcLHJA1lRFXR+XXOL vb6MrpRs4/PyR6osy5/tcRSn X-IronPort-AV: E=Sophos;i="5.87,293,1631602800"; d="scan'208";a="78762195" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 07 Dec 2021 07:03:47 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.14; Tue, 7 Dec 2021 07:03:47 -0700 Received: from ROB-ULT-M18064N.mchp-main.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2176.14 via Frontend Transport; Tue, 7 Dec 2021 07:03:42 -0700 From: Tudor Ambarus To: , Subject: [PATCH v6 09/14] mtd: spi-nor: core: Init all flash parameters based on SFDP where possible Date: Tue, 7 Dec 2021 16:02:49 +0200 Message-ID: <20211207140254.87681-10-tudor.ambarus@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211207140254.87681-1-tudor.ambarus@microchip.com> References: <20211207140254.87681-1-tudor.ambarus@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211207_060348_960351_88A7086C X-CRM114-Status: GOOD ( 26.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: macromorgan@hotmail.com, vigneshr@ti.com, Tudor Ambarus , jaimeliao@mxic.com.tw, richard@nod.at, esben@geanix.com, linux@rasmusvillemoes.dk, knaerzche@gmail.com, linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org, code@reto-schneider.ch, miquel.raynal@bootlin.com, heiko.thiery@gmail.com, sr@denx.de, figgyc@figgyc.uk, mail@david-bauer.net, zhengxunli@mxic.com.tw Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org New flash additions that support SFDP should be declared with PARSE_SFDP and with all the other flags that are not SFDP discoverable. Keep the old way of initializing the flash, until all the flashes are converted to use either PARSE_SFDP or SPI_NOR_SKIP_SFDP. Flashes that declare PARSE_SFDP do not have a roll-back mechanism because if spi_nor_parse_sfdp() returns an error it means that either BFPT is not supported, thus SFDP is not supported and the user didn't correctly declared the flash_info entry, or some memalloc failed. Either way we should return an error. The rest of the SFDP tables are optional, if one of the optional SFDP tables fails, we just continue. We would like to get rid of the default_init() hook, so the spi_nor_manufacturer_init_params() is not called in the new sequnce of flash initialization. Split spi_nor_info_init_params() in spi_nor_init_default_params() and spi_nor_no_sfdp_init_params(). spi_nor_init_default_params() is called for all the flashes regardless if they support SFDP or not. spi_nor_no_sfdp_init_params() is called just for the flashes that do not define SFDP and initializes parameters and setting solely based on flash_info data. Signed-off-by: Tudor Ambarus Reviewed-by: Pratyush Yadav --- drivers/mtd/spi-nor/core.c | 197 ++++++++++++++++++++++--------------- 1 file changed, 119 insertions(+), 78 deletions(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 86bbd1ca22fc..c5a5844e98c5 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2509,74 +2509,21 @@ static void spi_nor_manufacturer_init_params(struct spi_nor *nor) } /** - * spi_nor_sfdp_init_params() - Initialize the flash's parameters and settings - * based on JESD216 SFDP standard. - * @nor: pointer to a 'struct spi_nor'. - * - * The method has a roll-back mechanism: in case the SFDP parsing fails, the - * legacy flash parameters and settings will be restored. - */ -static void spi_nor_sfdp_init_params(struct spi_nor *nor) -{ - struct spi_nor_flash_parameter sfdp_params; - - memcpy(&sfdp_params, nor->params, sizeof(sfdp_params)); - - if (spi_nor_parse_sfdp(nor)) { - memcpy(nor->params, &sfdp_params, sizeof(*nor->params)); - nor->addr_width = 0; - nor->flags &= ~SNOR_F_4B_OPCODES; - } -} - -/** - * spi_nor_info_init_params() - Initialize the flash's parameters and settings - * based on nor->info data. + * spi_nor_no_sfdp_init_params() - Initialize the flash's parameters and + * settings based on nor->info->sfdp_flags. This method should be called only by + * flashes that do not define SFDP tables. If the flash supports SFDP but the + * information is wrong and the settings from this function can not be retrieved + * by parsing SFDP, one should instead use the fixup hooks and update the wrong + * bits. * @nor: pointer to a 'struct spi_nor'. */ -static void spi_nor_info_init_params(struct spi_nor *nor) +static void spi_nor_no_sfdp_init_params(struct spi_nor *nor) { struct spi_nor_flash_parameter *params = nor->params; struct spi_nor_erase_map *map = ¶ms->erase_map; - const struct flash_info *info = nor->info; - struct device_node *np = spi_nor_get_flash_node(nor); - const u8 no_sfdp_flags = info->no_sfdp_flags; + const u8 no_sfdp_flags = nor->info->no_sfdp_flags; u8 i, erase_mask; - /* Initialize default flash parameters and settings. */ - params->quad_enable = spi_nor_sr2_bit1_quad_enable; - params->set_4byte_addr_mode = spansion_set_4byte_addr_mode; - params->setup = spi_nor_default_setup; - params->otp.org = &info->otp_org; - - /* Default to 16-bit Write Status (01h) Command */ - nor->flags |= SNOR_F_HAS_16BIT_SR; - - /* Set SPI NOR sizes. */ - params->writesize = 1; - params->size = (u64)info->sector_size * info->n_sectors; - params->page_size = info->page_size; - - if (!(info->flags & SPI_NOR_NO_FR)) { - /* Default to Fast Read for DT and non-DT platform devices. */ - params->hwcaps.mask |= SNOR_HWCAPS_READ_FAST; - - /* Mask out Fast Read if not requested at DT instantiation. */ - if (np && !of_property_read_bool(np, "m25p,fast-read")) - params->hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST; - } - - /* (Fast) Read settings. */ - params->hwcaps.mask |= SNOR_HWCAPS_READ; - spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ], - 0, 0, SPINOR_OP_READ, - SNOR_PROTO_1_1_1); - - if (params->hwcaps.mask & SNOR_HWCAPS_READ_FAST) - spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_FAST], - 0, 8, SPINOR_OP_READ_FAST, - SNOR_PROTO_1_1_1); - if (no_sfdp_flags & SPI_NOR_DUAL_READ) { params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_2; spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_1_1_2], @@ -2605,11 +2552,6 @@ static void spi_nor_info_init_params(struct spi_nor *nor) SNOR_PROTO_8_8_8_DTR); } - /* Page Program settings. */ - params->hwcaps.mask |= SNOR_HWCAPS_PP; - spi_nor_set_pp_settings(¶ms->page_programs[SNOR_CMD_PP], - SPINOR_OP_PP, SNOR_PROTO_1_1_1); - if (no_sfdp_flags & SPI_NOR_OCTAL_DTR_PP) { params->hwcaps.mask |= SNOR_HWCAPS_PP_8_8_8_DTR; /* @@ -2638,7 +2580,7 @@ static void spi_nor_info_init_params(struct spi_nor *nor) i++; } erase_mask |= BIT(i); - spi_nor_set_erase_type(&map->erase_type[i], info->sector_size, + spi_nor_set_erase_type(&map->erase_type[i], nor->info->sector_size, SPINOR_OP_SE); spi_nor_init_uniform_erase_map(map, erase_mask, params->size); } @@ -2739,6 +2681,99 @@ static void spi_nor_late_init_params(struct spi_nor *nor) spi_nor_init_default_locking_ops(nor); } +/** + * spi_nor_sfdp_init_params_deprecated() - Deprecated way of initializing flash + * parameters and settings based on JESD216 SFDP standard. + * @nor: pointer to a 'struct spi_nor'. + * + * The method has a roll-back mechanism: in case the SFDP parsing fails, the + * legacy flash parameters and settings will be restored. + */ +static void spi_nor_sfdp_init_params_deprecated(struct spi_nor *nor) +{ + struct spi_nor_flash_parameter sfdp_params; + + memcpy(&sfdp_params, nor->params, sizeof(sfdp_params)); + + if (spi_nor_parse_sfdp(nor)) { + memcpy(nor->params, &sfdp_params, sizeof(*nor->params)); + nor->addr_width = 0; + nor->flags &= ~SNOR_F_4B_OPCODES; + } +} + +/** + * spi_nor_init_params_deprecated() - Deprecated way of initializing flash + * parameters and settings. + * @nor: pointer to a 'struct spi_nor'. + * + * The method assumes that flash doesn't support SFDP so it initializes flash + * parameters in spi_nor_no_sfdp_init_params() which later on can be overwritten + * when parsing SFDP, if supported. + */ +static void spi_nor_init_params_deprecated(struct spi_nor *nor) +{ + spi_nor_no_sfdp_init_params(nor); + + spi_nor_manufacturer_init_params(nor); + + if (nor->info->no_sfdp_flags & (SPI_NOR_DUAL_READ | + SPI_NOR_QUAD_READ | + SPI_NOR_OCTAL_READ | + SPI_NOR_OCTAL_DTR_READ)) + spi_nor_sfdp_init_params_deprecated(nor); +} + +/** + * spi_nor_init_default_params() - Default initialization of flash parameters + * and settings. Done for all flashes, regardless is they define SFDP tables + * or not. + * @nor: pointer to a 'struct spi_nor'. + */ +static void spi_nor_init_default_params(struct spi_nor *nor) +{ + struct spi_nor_flash_parameter *params = nor->params; + const struct flash_info *info = nor->info; + struct device_node *np = spi_nor_get_flash_node(nor); + + params->quad_enable = spi_nor_sr2_bit1_quad_enable; + params->set_4byte_addr_mode = spansion_set_4byte_addr_mode; + params->setup = spi_nor_default_setup; + params->otp.org = &info->otp_org; + + /* Default to 16-bit Write Status (01h) Command */ + nor->flags |= SNOR_F_HAS_16BIT_SR; + + /* Set SPI NOR sizes. */ + params->writesize = 1; + params->size = (u64)info->sector_size * info->n_sectors; + params->page_size = info->page_size; + + if (!(info->flags & SPI_NOR_NO_FR)) { + /* Default to Fast Read for DT and non-DT platform devices. */ + params->hwcaps.mask |= SNOR_HWCAPS_READ_FAST; + + /* Mask out Fast Read if not requested at DT instantiation. */ + if (np && !of_property_read_bool(np, "m25p,fast-read")) + params->hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST; + } + + /* (Fast) Read settings. */ + params->hwcaps.mask |= SNOR_HWCAPS_READ; + spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ], + 0, 0, SPINOR_OP_READ, + SNOR_PROTO_1_1_1); + + if (params->hwcaps.mask & SNOR_HWCAPS_READ_FAST) + spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_FAST], + 0, 8, SPINOR_OP_READ_FAST, + SNOR_PROTO_1_1_1); + /* Page Program settings. */ + params->hwcaps.mask |= SNOR_HWCAPS_PP; + spi_nor_set_pp_settings(¶ms->page_programs[SNOR_CMD_PP], + SPINOR_OP_PP, SNOR_PROTO_1_1_1); +} + /** * spi_nor_init_params() - Initialize the flash's parameters and settings. * @nor: pointer to a 'struct spi_nor'. @@ -2759,7 +2794,7 @@ static void spi_nor_late_init_params(struct spi_nor *nor) * which can be overwritten by: * 3/ SFDP flash parameters initialization. JESD216 SFDP is a standard and * should be more accurate that the above. - * spi_nor_sfdp_init_params() + * spi_nor_parse_sfdp() or spi_nor_no_sfdp_init_params() * * Please note that there is a ->post_bfpt() fixup hook that can overwrite * the flash parameters and settings immediately after parsing the Basic @@ -2773,24 +2808,30 @@ static void spi_nor_late_init_params(struct spi_nor *nor) * parameters that are not declared in the JESD216 SFDP standard, or where SFDP * tables are not defined at all. * spi_nor_late_init_params() + * + * Return: 0 on success, -errno otherwise. */ static int spi_nor_init_params(struct spi_nor *nor) { + int ret; + nor->params = devm_kzalloc(nor->dev, sizeof(*nor->params), GFP_KERNEL); if (!nor->params) return -ENOMEM; - spi_nor_info_init_params(nor); - - spi_nor_manufacturer_init_params(nor); + spi_nor_init_default_params(nor); - if ((nor->info->parse_sfdp || - (nor->info->no_sfdp_flags & (SPI_NOR_DUAL_READ | - SPI_NOR_QUAD_READ | - SPI_NOR_OCTAL_READ | - SPI_NOR_OCTAL_DTR_READ))) && - !(nor->info->no_sfdp_flags & SPI_NOR_SKIP_SFDP)) - spi_nor_sfdp_init_params(nor); + if (nor->info->parse_sfdp) { + ret = spi_nor_parse_sfdp(nor); + if (ret) { + dev_err(nor->dev, "BFPT parsing failed. Please consider using SPI_NOR_SKIP_SFDP when declaring the flash\n"); + return ret; + } + } else if (nor->info->no_sfdp_flags & SPI_NOR_SKIP_SFDP) { + spi_nor_no_sfdp_init_params(nor); + } else { + spi_nor_init_params_deprecated(nor); + } spi_nor_late_init_params(nor);