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[144.168.56.201]) by smtp.gmail.com with ESMTPSA id e5sm3475068qtq.1.2021.03.05.22.01.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Mar 2021 22:01:59 -0800 (PST) From: Bin Meng To: Alistair Francis Subject: [PATCH v2] hw/block: m25p80: Support fast read for SST flashes Date: Sat, 6 Mar 2021 14:01:52 +0800 Message-Id: <20210306060152.7250-1-bmeng.cn@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::835; envelope-from=bmeng.cn@gmail.com; helo=mail-qt1-x835.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bin Meng , qemu-devel@nongnu.org, qemu-block@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Bin Meng Per SST25VF016B datasheet [1], SST flash requires a dummy byte after the address bytes. Note only SPI mode is supported by SST flashes. [1] http://ww1.microchip.com/downloads/en/devicedoc/s71271_04.pdf Signed-off-by: Bin Meng Acked-by: Alistair Francis --- Changes in v2: - rebase on qemu/master hw/block/m25p80.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index 5f9471d83c..183d3f44c2 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -895,6 +895,9 @@ static void decode_fast_read_cmd(Flash *s) s->needed_bytes = get_addr_length(s); switch (get_man(s)) { /* Dummy cycles - modeled with bytes writes instead of bits */ + case MAN_SST: + s->needed_bytes += 1; + break; case MAN_WINBOND: s->needed_bytes += 8; break;