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=-13.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 8EC2FC4741F for ; Wed, 30 Sep 2020 18:58:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33686206DC for ; Wed, 30 Sep 2020 18:58:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="L/El2gvQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730841AbgI3S6L (ORCPT ); Wed, 30 Sep 2020 14:58:11 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:35726 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730146AbgI3S6B (ORCPT ); Wed, 30 Sep 2020 14:58:01 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 08UIvqtW022148; Wed, 30 Sep 2020 13:57:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1601492272; bh=fw8GsthntBelNAH4dJk23bM5IKKwNmZk9gSKZ5x0JKw=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=L/El2gvQo+8kGz+8MDlw6u5Lbllg+Vg/j+CJTlN3NEj8zNjoadLMmVNpKVTiNlArS 0oijDG5eepMc7wGZrBAjTndP8FiYD6EQnYeKQ7j+9HwYMdDopHu6NeKvFQjT5gxwAM NIU1jIfenbp5QKInKVu8SwGP3t5nrVxWE3d/D34M= Received: from DFLE113.ent.ti.com (dfle113.ent.ti.com [10.64.6.34]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 08UIvqqu065102 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 30 Sep 2020 13:57:52 -0500 Received: from DFLE104.ent.ti.com (10.64.6.25) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Wed, 30 Sep 2020 13:57:52 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Wed, 30 Sep 2020 13:57:51 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 08UIvX3E007008; Wed, 30 Sep 2020 13:57:49 -0500 From: Pratyush Yadav To: Tudor Ambarus , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , , CC: Pratyush Yadav , Sekhar Nori , Boris Brezillon Subject: [PATCH v14 05/15] mtd: spi-nor: sfdp: parse xSPI Profile 1.0 table Date: Thu, 1 Oct 2020 00:27:22 +0530 Message-ID: <20200930185732.6201-6-p.yadav@ti.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200930185732.6201-1-p.yadav@ti.com> References: <20200930185732.6201-1-p.yadav@ti.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This table is indication that the flash is xSPI compliant and hence supports octal DTR mode. Extract information like the fast read opcode, dummy cycles, the number of dummy cycles needed for a Read Status Register command, and the number of address bytes needed for a Read Status Register command. We don't know what speed the controller is running at. Find the fast read dummy cycles for the fastest frequency the flash can run at to be sure we are never short of dummy cycles. If nothing is available, default to 20. Flashes that use a different value should update it in their fixup hooks. Since we want to set read settings, expose spi_nor_set_read_settings() in core.h. Signed-off-by: Pratyush Yadav --- drivers/mtd/spi-nor/core.c | 2 +- drivers/mtd/spi-nor/core.h | 10 +++++ drivers/mtd/spi-nor/sfdp.c | 91 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 102 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index beb17639dc92..97e82a4821f6 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2332,7 +2332,7 @@ static int spi_nor_check(struct spi_nor *nor) return 0; } -static void +void spi_nor_set_read_settings(struct spi_nor_read_command *read, u8 num_mode_clocks, u8 num_wait_states, diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index 5d95b4183a33..9a33c8d07335 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -192,6 +192,9 @@ struct spi_nor_locking_ops { * * @size: the flash memory density in bytes. * @page_size: the page size of the SPI NOR flash memory. + * @rdsr_dummy: dummy cycles needed for Read Status Register command. + * @rdsr_addr_nbytes: dummy address bytes needed for Read Status Register + * command. * @hwcaps: describes the read and page program hardware * capabilities. * @reads: read capabilities ordered by priority: the higher index @@ -214,6 +217,8 @@ struct spi_nor_locking_ops { struct spi_nor_flash_parameter { u64 size; u32 page_size; + u8 rdsr_dummy; + u8 rdsr_addr_nbytes; struct spi_nor_hwcaps hwcaps; struct spi_nor_read_command reads[SNOR_CMD_READ_MAX]; @@ -425,6 +430,11 @@ ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len, int spi_nor_hwcaps_read2cmd(u32 hwcaps); u8 spi_nor_convert_3to4_read(u8 opcode); +void spi_nor_set_read_settings(struct spi_nor_read_command *read, + u8 num_mode_clocks, + u8 num_wait_states, + u8 opcode, + enum spi_nor_protocol proto); void spi_nor_set_pp_settings(struct spi_nor_pp_command *pp, u8 opcode, enum spi_nor_protocol proto); diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index c77655968f80..ebc1188f7533 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -4,6 +4,7 @@ * Copyright (C) 2014, Freescale Semiconductor, Inc. */ +#include #include #include #include @@ -19,6 +20,7 @@ #define SFDP_BFPT_ID 0xff00 /* Basic Flash Parameter Table */ #define SFDP_SECTOR_MAP_ID 0xff81 /* Sector Map Table */ #define SFDP_4BAIT_ID 0xff84 /* 4-byte Address Instruction Table */ +#define SFDP_PROFILE1_ID 0xff05 /* xSPI Profile 1.0 table. */ #define SFDP_SIGNATURE 0x50444653U @@ -1108,6 +1110,91 @@ static int spi_nor_parse_4bait(struct spi_nor *nor, return ret; } +#define PROFILE1_DWORD1_RDSR_ADDR_BYTES BIT(29) +#define PROFILE1_DWORD1_RDSR_DUMMY BIT(28) +#define PROFILE1_DWORD1_RD_FAST_CMD GENMASK(15, 8) +#define PROFILE1_DWORD4_DUMMY_200MHZ GENMASK(11, 7) +#define PROFILE1_DWORD5_DUMMY_166MHZ GENMASK(31, 27) +#define PROFILE1_DWORD5_DUMMY_133MHZ GENMASK(21, 17) +#define PROFILE1_DWORD5_DUMMY_100MHZ GENMASK(11, 7) + +/** + * spi_nor_parse_profile1() - parse the xSPI Profile 1.0 table + * @nor: pointer to a 'struct spi_nor' + * @profile1_header: pointer to the 'struct sfdp_parameter_header' describing + * the Profile 1.0 Table length and version. + * @params: pointer to the 'struct spi_nor_flash_parameter' to be. + * + * Return: 0 on success, -errno otherwise. + */ +static int spi_nor_parse_profile1(struct spi_nor *nor, + const struct sfdp_parameter_header *profile1_header, + struct spi_nor_flash_parameter *params) +{ + u32 *dwords, addr; + size_t len; + int ret; + u8 dummy = 0, opcode; + + len = profile1_header->length * sizeof(*dwords); + dwords = kmalloc(len, GFP_KERNEL); + if (!dwords) + return -ENOMEM; + + addr = SFDP_PARAM_HEADER_PTP(profile1_header); + ret = spi_nor_read_sfdp(nor, addr, len, dwords); + if (ret) + goto out; + + le32_to_cpu_array(dwords, profile1_header->length); + + /* Get 8D-8D-8D fast read opcode and dummy cycles. */ + opcode = FIELD_GET(PROFILE1_DWORD1_RD_FAST_CMD, dwords[0]); + + /* Set the Read Status Register dummy cycles and dummy address bytes. */ + if (dwords[0] & PROFILE1_DWORD1_RDSR_DUMMY) + params->rdsr_dummy = 8; + else + params->rdsr_dummy = 4; + + if (dwords[0] & PROFILE1_DWORD1_RDSR_ADDR_BYTES) + params->rdsr_addr_nbytes = 4; + else + params->rdsr_addr_nbytes = 0; + + /* + * We don't know what speed the controller is running at. Find the + * dummy cycles for the fastest frequency the flash can run at to be + * sure we are never short of dummy cycles. A value of 0 means the + * frequency is not supported. + * + * Default to PROFILE1_DUMMY_DEFAULT if we don't find anything, and let + * flashes set the correct value if needed in their fixup hooks. + */ + dummy = FIELD_GET(PROFILE1_DWORD4_DUMMY_200MHZ, dwords[3]); + if (!dummy) + dummy = FIELD_GET(PROFILE1_DWORD5_DUMMY_166MHZ, dwords[4]); + if (!dummy) + dummy = FIELD_GET(PROFILE1_DWORD5_DUMMY_133MHZ, dwords[4]); + if (!dummy) + dummy = FIELD_GET(PROFILE1_DWORD5_DUMMY_100MHZ, dwords[4]); + if (!dummy) + dev_dbg(nor->dev, + "Can't find dummy cycles from Profile 1.0 table\n"); + + /* Round up to an even value to avoid tripping controllers up. */ + dummy = round_up(dummy, 2); + + /* Update the fast read settings. */ + spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_8_8_8_DTR], + 0, dummy, opcode, + SNOR_PROTO_8_8_8_DTR); + +out: + kfree(dwords); + return ret; +} + /** * spi_nor_parse_sfdp() - parse the Serial Flash Discoverable Parameters. * @nor: pointer to a 'struct spi_nor' @@ -1209,6 +1296,10 @@ int spi_nor_parse_sfdp(struct spi_nor *nor, err = spi_nor_parse_4bait(nor, param_header, params); break; + case SFDP_PROFILE1_ID: + err = spi_nor_parse_profile1(nor, param_header, params); + break; + default: break; } -- 2.28.0