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[83.254.152.225]) by smtp.gmail.com with ESMTPSA id v62sm2819800lje.39.2017.10.29.03.13.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 29 Oct 2017 03:13:48 -0700 (PDT) From: Francisco Iglesias To: qemu-devel@nongnu.org Date: Sun, 29 Oct 2017 11:13:31 +0100 Message-Id: <20171029101343.15544-2-frasse.iglesias@gmail.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20171029101343.15544-1-frasse.iglesias@gmail.com> References: <20171029101343.15544-1-frasse.iglesias@gmail.com> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4010:c07::243 Subject: [Qemu-devel] [PATCH v5 01/13] m25p80: Add support for continuous read out of RDSR and READ_FSR X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgari@xilinx.com, alistai@xilinx.com, francisco.iglesias@feimtech.se, mar.krzeminski@gmail.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add support for continuous read out of the RDSR and READ_FSR status registers until the chip select is deasserted. This feature is supported by amongst others 1 or more flashtypes manufactured by Numonyx (Micron), Windbond, SST, Gigadevice, Eon and Macronix. Signed-off-by: Francisco Iglesias Acked-by: Marcin Krzemiński Acked-by: Alistair Francis --- hw/block/m25p80.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index a2438b9..2971519 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -423,6 +423,7 @@ typedef struct Flash { uint8_t data[M25P80_INTERNAL_DATA_BUFFER_SZ]; uint32_t len; uint32_t pos; + bool data_read_loop; uint8_t needed_bytes; uint8_t cmd_in_progress; uint32_t cur_addr; @@ -983,6 +984,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; s->len = 1; + s->data_read_loop = true; s->state = STATE_READING_DATA; break; @@ -993,6 +995,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; s->len = 1; + s->data_read_loop = true; s->state = STATE_READING_DATA; break; @@ -1133,6 +1136,7 @@ static int m25p80_cs(SSISlave *ss, bool select) s->pos = 0; s->state = STATE_IDLE; flash_sync_dirty(s, -1); + s->data_read_loop = false; } DB_PRINT_L(0, "%sselect\n", select ? "de" : ""); @@ -1198,7 +1202,9 @@ static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t tx) s->pos++; if (s->pos == s->len) { s->pos = 0; - s->state = STATE_IDLE; + if (!s->data_read_loop) { + s->state = STATE_IDLE; + } } break;