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[144.168.56.201]) by smtp.gmail.com with ESMTPSA id w21sm5372051pfq.67.2021.01.14.07.10.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Jan 2021 07:10:23 -0800 (PST) From: Bin Meng To: Alistair Francis , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Peter Maydell , Francisco Iglesias Subject: [PATCH 5/9] hw/block: m25p80: Support fast read for SST flashes Date: Thu, 14 Jan 2021 23:08:58 +0800 Message-Id: <20210114150902.11515-6-bmeng.cn@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210114150902.11515-1-bmeng.cn@gmail.com> References: <20210114150902.11515-1-bmeng.cn@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::433; envelope-from=bmeng.cn@gmail.com; helo=mail-pf1-x433.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: Kevin Wolf , Bin Meng , qemu-devel@nongnu.org, qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.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 --- hw/block/m25p80.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index e1e5d5a76f..512af61ba5 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -928,6 +928,9 @@ 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 */ + case MAN_SST: + s->needed_bytes += 1; + break; case MAN_WINBOND: switch (s->cmd_in_progress) { case FAST_READ: -- 2.25.1