From: Guenter Roeck <linux@roeck-us.net>
To: Alistair Francis <alistair@alistair23.me>, Kevin Wolf <kwolf@redhat.com>
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
qemu-block@nongnu.org, "Andrew Jeffery" <andrew@aj.id.au>,
qemu-devel@nongnu.org, "Max Reitz" <mreitz@redhat.com>,
qemu-arm@nongnu.org, "Joel Stanley" <joel@jms.id.au>,
"Guenter Roeck" <linux@roeck-us.net>,
"Cédric Le Goater" <clg@kaod.org>
Subject: [PATCH v2 4/4] aspeed/smc: Fix number of dummy cycles for FAST_READ_4 command
Date: Thu, 6 Feb 2020 10:32:19 -0800 [thread overview]
Message-ID: <20200206183219.3756-4-linux@roeck-us.net> (raw)
In-Reply-To: <20200206183219.3756-1-linux@roeck-us.net>
The Linux kernel recently started using FAST_READ_4 commands.
This results in flash read failures. At the same time, the m25p80
emulation is seen to read 8 more bytes than expected. Adjusting the
expected number of dummy cycles to match FAST_READ fixes the problem.
Fixes: f95c4bffdc4c ("aspeed/smc: snoop SPI transfers to fake dummy cycles")
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
v2: No change
hw/ssi/aspeed_smc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c
index 23c8d2f062..0444570750 100644
--- a/hw/ssi/aspeed_smc.c
+++ b/hw/ssi/aspeed_smc.c
@@ -787,11 +787,11 @@ static int aspeed_smc_num_dummies(uint8_t command)
case FAST_READ:
case DOR:
case QOR:
+ case FAST_READ_4:
case DOR_4:
case QOR_4:
return 1;
case DIOR:
- case FAST_READ_4:
case DIOR_4:
return 2;
case QIOR:
--
2.17.1
next prev parent reply other threads:[~2020-02-06 18:37 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-06 18:32 [PATCH v2 1/4] m25p80: Convert to support tracing Guenter Roeck
2020-02-06 18:32 ` [PATCH v2 2/4] m25p80: Improve command handling for Jedec commands Guenter Roeck
2020-02-06 18:36 ` Philippe Mathieu-Daudé
2020-02-06 22:26 ` Alistair Francis
2020-02-07 7:22 ` Cédric Le Goater
2020-07-21 17:36 ` Cédric Le Goater
2020-07-21 19:57 ` Guenter Roeck
2020-07-22 8:02 ` Cédric Le Goater
2020-07-22 10:19 ` Philippe Mathieu-Daudé
2020-02-06 18:32 ` [PATCH v2 3/4] m25p80: Improve command handling for unsupported commands Guenter Roeck
2020-02-07 0:21 ` Philippe Mathieu-Daudé
2020-02-07 7:22 ` Cédric Le Goater
2020-02-06 18:32 ` Guenter Roeck [this message]
2020-02-06 18:39 ` [PATCH v2 4/4] aspeed/smc: Fix number of dummy cycles for FAST_READ_4 command Philippe Mathieu-Daudé
2020-02-06 18:40 ` [PATCH v2 1/4] m25p80: Convert to support tracing Philippe Mathieu-Daudé
2020-02-06 22:19 ` Alistair Francis
2020-02-07 7:22 ` Cédric Le Goater
2020-02-17 15:47 ` Cédric Le Goater
2020-03-16 14:13 ` Cédric Le Goater
2020-03-16 14:58 ` Peter Maydell
2020-03-16 15:11 ` Cédric Le Goater
2020-03-16 15:29 ` Peter Maydell
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