From patchwork Tue May 19 14:26:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 11557809 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DDE1E13B4 for ; Tue, 19 May 2020 14:27:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C1DA82081A for ; Tue, 19 May 2020 14:27:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="oPN23grp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728890AbgESO1t (ORCPT ); Tue, 19 May 2020 10:27:49 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:53776 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728994AbgESO1s (ORCPT ); Tue, 19 May 2020 10:27:48 -0400 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 04JERXRN123385; Tue, 19 May 2020 09:27:33 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1589898453; bh=eISrLet83O0w+gQtwdj2mYLowiqEnJmVDkyyRd/HTHg=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=oPN23grpOFBBk8ppm1M32JM30QXVeifjk06fFEHI0w8/qNLwJusm9b3GcV/76kdla xN7bzisT1UWxnhmRkF1Qrw7csblPl4UeJEvoNHPHq86AQdM0FV0RplXD8XcZCKgv1R XiA1V2HXW1/SHI0WTiLhJO85e5E9bbQQOjzUE+WQ= Received: from DLEE115.ent.ti.com (dlee115.ent.ti.com [157.170.170.26]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 04JERXJi081983 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 19 May 2020 09:27:33 -0500 Received: from DLEE108.ent.ti.com (157.170.170.38) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Tue, 19 May 2020 09:27:33 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE108.ent.ti.com (157.170.170.38) 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; Tue, 19 May 2020 09:27:33 -0500 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 04JEQgjR008313; Tue, 19 May 2020 09:27:28 -0500 From: Pratyush Yadav To: Tudor Ambarus , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mark Brown , Nicolas Ferre , Alexandre Belloni , Ludovic Desroches , Matthias Brugger , , , , , CC: Pratyush Yadav , Sekhar Nori , Boris Brezillon , Mason Yang Subject: [PATCH v5 09/19] mtd: spi-nor: sfdp: parse xSPI Profile 1.0 table Date: Tue, 19 May 2020 19:56:31 +0530 Message-ID: <20200519142642.24131-10-p.yadav@ti.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200519142642.24131-1-p.yadav@ti.com> References: <20200519142642.24131-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@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, 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. The default dummy cycles for a fast octal DTR read are set to 20. Since there is no simple way of determining the dummy cycles needed for the fast read command, flashes that use a different value should update it in their flash-specific 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 | 73 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 84 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 388e695e763f..642e3c07acf9 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -2355,7 +2355,7 @@ 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 de1e3917889f..7e6df8322da0 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]; @@ -424,6 +429,11 @@ 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 ab086aa4746f..4e5e0eabe2d9 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 @@ -19,12 +20,14 @@ #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 #define SFDP_JESD216_MAJOR 1 #define SFDP_JESD216_MINOR 0 #define SFDP_JESD216A_MINOR 5 #define SFDP_JESD216B_MINOR 6 +#define SFDP_JESD216D_MINOR 8 struct sfdp_header { u32 signature; /* Ox50444653U <=> "SFDP" */ @@ -70,6 +73,11 @@ struct sfdp_bfpt_erase { u32 shift; }; +/* xSPI Profile 1.0 table (from JESD216D.01). */ +#define PROFILE1_DWORD1_RD_FAST_CMD GENMASK(15, 8) +#define PROFILE1_DWORD1_RDSR_DUMMY BIT(28) +#define PROFILE1_DWORD1_RDSR_ADDR_BYTES BIT(29) + #define SMPT_CMD_ADDRESS_LEN_MASK GENMASK(23, 22) #define SMPT_CMD_ADDRESS_LEN_0 (0x0UL << 22) #define SMPT_CMD_ADDRESS_LEN_3 (0x1UL << 22) @@ -1110,6 +1118,67 @@ static int spi_nor_parse_4bait(struct spi_nor *nor, return ret; } +/** + * spi_nor_parse_profile1() - parse the xSPI Profile 1.0 table + * @nor: pointer to a 'struct spi_nor' + * @param_header: pointer to the 'struct sfdp_parameter_header' describing + * the 4-Byte Address Instruction 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 *table, opcode, addr; + size_t len; + int ret, i; + + len = profile1_header->length * sizeof(*table); + table = kmalloc(len, GFP_KERNEL); + if (!table) + return -ENOMEM; + + addr = SFDP_PARAM_HEADER_PTP(profile1_header); + ret = spi_nor_read_sfdp(nor, addr, len, table); + if (ret) + goto out; + + /* Fix endianness of the table DWORDs. */ + for (i = 0; i < profile1_header->length; i++) + table[i] = le32_to_cpu(table[i]); + + /* Get 8D-8D-8D fast read opcode and dummy cycles. */ + opcode = FIELD_GET(PROFILE1_DWORD1_RD_FAST_CMD, table[0]); + + /* + * Update the fast read settings. We set the default dummy cycles to 20 + * here. Flashes can change this value if they need to when enabling + * octal mode. + */ + spi_nor_set_read_settings(¶ms->reads[SNOR_CMD_READ_8_8_8_DTR], + 0, 20, opcode, + SNOR_PROTO_8_8_8_DTR); + + /* + * Set the Read Status Register dummy cycles and dummy address bytes. + */ + if (table[0] & PROFILE1_DWORD1_RDSR_DUMMY) + params->rdsr_dummy = 8; + else + params->rdsr_dummy = 4; + + if (table[0] & PROFILE1_DWORD1_RDSR_ADDR_BYTES) + params->rdsr_addr_nbytes = 4; + else + params->rdsr_addr_nbytes = 0; + +out: + kfree(table); + return ret; +} + /** * spi_nor_parse_sfdp() - parse the Serial Flash Discoverable Parameters. * @nor: pointer to a 'struct spi_nor' @@ -1211,6 +1280,10 @@ 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; }