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22 Mar 2021 18:41:48 -0700 IronPort-SDR: kybWN8yaz672PCB0mVQuVlrp9TqL/0F8sXMUr636Xi8puDCQxL1kmtMcRPlJU/Ubl8Wu/NEsFD Chs223spk1JaXogQZfL3nmJvzXKsttgp4aFgVg5nXVCao/DnL2t2oKAynUliHffFOjvLKFrgXn QxzHVey1oWWx+aUn/sMJHQM/TjdEz2vqBeFe+mOnF/BEUyySte33K6txbw0FcXfoj4PQfrUQ1E RXRGgXqMHxOJ1GfhKMU1n7rpPSNWkSP8y7QDC0jm4bQ2Aiuz1Jgp2dFlOJ7GJDvYEStTwPxjXC NP8= WDCIronportException: Internal Received: from cn6ntbqq2.ad.shared (HELO alistair-risc6-laptop.hgst.com) ([10.86.49.5]) by uls-op-cesaip01.wdc.com with ESMTP; 22 Mar 2021 18:59:40 -0700 From: Alistair Francis To: peter.maydell@linaro.org Subject: [PULL 13/16] hw/block: m25p80: Support fast read for SST flashes Date: Mon, 22 Mar 2021 21:57:53 -0400 Message-Id: <20210323015756.3168650-14-alistair.francis@wdc.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210323015756.3168650-1-alistair.francis@wdc.com> References: <20210323015756.3168650-1-alistair.francis@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=216.71.154.42; envelope-from=prvs=709ee912d=alistair.francis@wdc.com; helo=esa4.hgst.iphmx.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-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: alistair23@gmail.com, Bin Meng , Alistair Francis , qemu-devel@nongnu.org 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 Acked-by: Alistair Francis Message-id: 20210306060152.7250-1-bmeng.cn@gmail.com Signed-off-by: Alistair Francis --- 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; -- 2.30.1