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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 48372C43334 for ; Fri, 22 Jul 2022 06:41:15 +0000 (UTC) Received: from localhost ([::1]:34314 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oEmLa-0002x1-3q for qemu-devel@archiver.kernel.org; Fri, 22 Jul 2022 02:41:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43284) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oEmGt-000893-VZ; Fri, 22 Jul 2022 02:36:24 -0400 Received: from mail.ozlabs.org ([2404:9400:2221:ea00::3]:48699 helo=gandalf.ozlabs.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oEmGr-00011z-Df; Fri, 22 Jul 2022 02:36:23 -0400 Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4Lq0801KTtz4xGJ; Fri, 22 Jul 2022 16:36:16 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Lq07w2Nnvz4xG6; Fri, 22 Jul 2022 16:36:12 +1000 (AEST) From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: qemu-arm@nongnu.org, qemu-block@nongnu.org, Peter Maydell , Joel Stanley , Andrew Jeffery , Alistair Francis , Francisco Iglesias , Iris Chen , Michael Walle , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PATCH v3 1/8] m25p80: Add basic support for the SFDP command Date: Fri, 22 Jul 2022 08:35:55 +0200 Message-Id: <20220722063602.128144-2-clg@kaod.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220722063602.128144-1-clg@kaod.org> References: <20220722063602.128144-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2404:9400:2221:ea00::3; envelope-from=SRS0=w2Kw=X3=kaod.org=clg@ozlabs.org; helo=gandalf.ozlabs.org X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" JEDEC STANDARD JESD216 for Serial Flash Discovery Parameters (SFDP) provides a mean to describe the features of a serial flash device using a set of internal parameter tables. This is the initial framework for the RDSFDP command giving access to a private SFDP area under the flash. This area now needs to be populated with the flash device characteristics, using a new 'sfdp_read' handler under FlashPartInfo. Signed-off-by: Cédric Le Goater --- hw/block/m25p80_sfdp.h | 18 ++++++++++++++++++ hw/block/m25p80.c | 27 +++++++++++++++++++++++++++ MAINTAINERS | 2 +- hw/block/trace-events | 1 + 4 files changed, 47 insertions(+), 1 deletion(-) create mode 100644 hw/block/m25p80_sfdp.h diff --git a/hw/block/m25p80_sfdp.h b/hw/block/m25p80_sfdp.h new file mode 100644 index 000000000000..230b07ef3308 --- /dev/null +++ b/hw/block/m25p80_sfdp.h @@ -0,0 +1,18 @@ +/* + * M25P80 SFDP + * + * Copyright (c) 2020, IBM Corporation. + * + * This code is licensed under the GPL version 2 or later. See the + * COPYING file in the top-level directory. + */ + +#ifndef HW_M25P80_SFDP_H +#define HW_M25P80_SFDP_H + +/* + * SFDP area has a 3 bytes address space. + */ +#define M25P80_SFDP_MAX_SIZE (1 << 24) + +#endif diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index a8d2519141f7..abdc4c0b0da7 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -35,6 +35,7 @@ #include "qapi/error.h" #include "trace.h" #include "qom/object.h" +#include "m25p80_sfdp.h" /* 16 MiB max in 3 byte address mode */ #define MAX_3BYTES_SIZE 0x1000000 @@ -72,6 +73,7 @@ typedef struct FlashPartInfo { * This field inform how many die is in the chip. */ uint8_t die_cnt; + uint8_t (*sfdp_read)(uint32_t sfdp_addr); } FlashPartInfo; /* adapted from linux */ @@ -355,6 +357,7 @@ typedef enum { BULK_ERASE = 0xc7, READ_FSR = 0x70, RDCR = 0x15, + RDSFDP = 0x5a, READ = 0x03, READ4 = 0x13, @@ -421,6 +424,7 @@ typedef enum { STATE_COLLECTING_DATA, STATE_COLLECTING_VAR_LEN_DATA, STATE_READING_DATA, + STATE_READING_SFDP, } CMDState; typedef enum { @@ -679,6 +683,8 @@ static inline int get_addr_length(Flash *s) } switch (s->cmd_in_progress) { + case RDSFDP: + return 3; case PP4: case PP4_4: case QPP_4: @@ -823,6 +829,11 @@ static void complete_collecting_data(Flash *s) " by device\n"); } break; + + case RDSFDP: + s->state = STATE_READING_SFDP; + break; + default: break; } @@ -1431,6 +1442,16 @@ static void decode_new_cmd(Flash *s, uint32_t value) qemu_log_mask(LOG_GUEST_ERROR, "M25P80: Unknown cmd %x\n", value); } break; + case RDSFDP: + if (s->pi->sfdp_read) { + s->needed_bytes = get_addr_length(s) + 1; /* SFDP addr + dummy */ + s->pos = 0; + s->len = 0; + s->state = STATE_COLLECTING_DATA; + break; + } + /* Fallthrough */ + default: s->pos = 0; s->len = 1; @@ -1538,6 +1559,12 @@ static uint32_t m25p80_transfer8(SSIPeripheral *ss, uint32_t tx) } } break; + case STATE_READING_SFDP: + assert(s->pi->sfdp_read); + r = s->pi->sfdp_read(s->cur_addr); + trace_m25p80_read_sfdp(s, s->cur_addr, (uint8_t)r); + s->cur_addr = (s->cur_addr + 1) & (M25P80_SFDP_MAX_SIZE - 1); + break; default: case STATE_IDLE: diff --git a/MAINTAINERS b/MAINTAINERS index 6af9cd985cea..92f232f01e3c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1915,7 +1915,7 @@ SSI M: Alistair Francis S: Maintained F: hw/ssi/* -F: hw/block/m25p80.c +F: hw/block/m25p80* F: include/hw/ssi/ssi.h X: hw/ssi/xilinx_* F: tests/qtest/m25p80-test.c diff --git a/hw/block/trace-events b/hw/block/trace-events index d86b53520cc5..2c45a62bd59c 100644 --- a/hw/block/trace-events +++ b/hw/block/trace-events @@ -80,5 +80,6 @@ m25p80_page_program(void *s, uint32_t addr, uint8_t tx) "[%p] page program cur_a m25p80_transfer(void *s, uint8_t state, uint32_t len, uint8_t needed, uint32_t pos, uint32_t cur_addr, uint8_t t) "[%p] Transfer state 0x%"PRIx8" len 0x%"PRIx32" needed 0x%"PRIx8" pos 0x%"PRIx32" addr 0x%"PRIx32" tx 0x%"PRIx8 m25p80_read_byte(void *s, uint32_t addr, uint8_t v) "[%p] Read byte 0x%"PRIx32"=0x%"PRIx8 m25p80_read_data(void *s, uint32_t pos, uint8_t v) "[%p] Read data 0x%"PRIx32"=0x%"PRIx8 +m25p80_read_sfdp(void *s, uint32_t addr, uint8_t v) "[%p] Read SFDP 0x%"PRIx32"=0x%"PRIx8 m25p80_binding(void *s) "[%p] Binding to IF_MTD drive" m25p80_binding_no_bdrv(void *s) "[%p] No BDRV - binding to RAM" -- 2.35.3