From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:45967) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e8kbJ-0006UD-0z for qemu-devel@nongnu.org; Sun, 29 Oct 2017 06:13:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e8kbG-0007oM-US for qemu-devel@nongnu.org; Sun, 29 Oct 2017 06:13:52 -0400 Received: from mail-lf0-x243.google.com ([2a00:1450:4010:c07::243]:55084) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1e8kbG-0007mx-N7 for qemu-devel@nongnu.org; Sun, 29 Oct 2017 06:13:50 -0400 Received: by mail-lf0-x243.google.com with SMTP id a2so11637261lfh.11 for ; Sun, 29 Oct 2017 03:13:50 -0700 (PDT) From: Francisco Iglesias Date: Sun, 29 Oct 2017 11:13:31 +0100 Message-Id: <20171029101343.15544-2-frasse.iglesias@gmail.com> In-Reply-To: <20171029101343.15544-1-frasse.iglesias@gmail.com> References: <20171029101343.15544-1-frasse.iglesias@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v5 01/13] m25p80: Add support for continuous read out of RDSR and READ_FSR List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: edgari@xilinx.com, alistai@xilinx.com, francisco.iglesias@feimtech.se, mar.krzeminski@gmail.com 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; -- 2.9.3