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[132.162.70.93]) by smtp.gmail.com with ESMTPSA id h133sm5969313itb.34.2019.04.08.13.57.12 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 08 Apr 2019 13:57:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oberlin-edu.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=3tEK2+PJw+6WFM4pZIhW7cs7LsovEQMQJBOABPDmMrk=; b=hzaSIRzeA58ysD8JgewGXDZsmXJ8lQXeNpgX7M0DFghMQ9NWqXXYnAb6n1/SLTyfRp wHTNgrn9qGg+IvXejahWTcZFuXKbDZfnCCGRxA3A5MU9lpumCZ+RM/FIV8lQT7VVhHVH bDYVoq77lbJhswSlOo5BwDkoTyiMYDZQ1/YheoI4iFz11AVO5ey/KaDxtVWwYsIjZhOQ osNg78AlzYpJnogb9vQOu+QBrxqPD//IFIJ/TyShcIXbrfffB8M/E9ACvUA0dzd/9Qq5 QpCda8s1G89glXA/56fZWF3je5gwy5arEt94p2u7O9kn2t4N/MGPIhdEAlXbKT2AG0AS qeVA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3tEK2+PJw+6WFM4pZIhW7cs7LsovEQMQJBOABPDmMrk=; b=j8ZSsT8QLmFBKBhJLS2bzghIW3boIHp0ViGq3HfPIzRnF5netivVf65k8PKmLVL+Wc m43EcJlZhY7kfMX/5YuS2j1Cv/NEmFd2B0neBLmwLtM+kLup5uAYlWIt3poBDbj/aN9I 2wRJSofZbBSByiqDDGAy3CgGDHWi09NeAskQpdapXknw49zmXSpMOGEFcRh8cerUQTCA eUadKkfKcqdrv/yolnacTi4Y5PZC5RKci16JL8lvthv5/yH6VosNcuvX+s0DMcFCDpMM uZgTnX741dxdXEXQu0xglHHcHiS8Q1SwL5bQVtiw+LU7WRjvzWoaU7T1GsKJOIP1zSfz Wdog== X-Gm-Message-State: APjAAAV8a043q2m8GI97cAgNhZYquru0nScbTg7G3n/tqeFzhUCXCPmB a6RpW0ONM812couc7TuH/dlXsOzUPkYtXw== X-Google-Smtp-Source: APXvYqxAogRVK8jGET7FPANFG7r9/XESdYfHQMZjeReIi0EQiamJeoJ1u23/T+dFvqC/5CF76/9RNw== X-Received: by 2002:a02:1a89:: with SMTP id 131mr23128006jai.78.1554757034058; Mon, 08 Apr 2019 13:57:14 -0700 (PDT) From: Stephen Checkoway To: qemu-devel@nongnu.org Date: Mon, 8 Apr 2019 16:55:49 -0400 Message-Id: <32151d01f48ada4e0099f3adfd88229c5e5648c0.1554755001.git.stephen.checkoway@oberlin.edu> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::133 Subject: [Qemu-devel] [PATCH 06/10] block/pflash_cfi02: Fix CFI in autoselect mode 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: Kevin Wolf , Laurent Vivier , Thomas Huth , Stephen Checkoway , qemu-block@nongnu.org, Max Reitz , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" After a flash device enters CFI mode from autoselect mode, the reset command returns the device to autoselect mode. An additional reset command is necessary to return to read array mode. Signed-off-by: Stephen Checkoway --- hw/block/pflash_cfi02.c | 21 +++++++++++++++++---- tests/pflash-cfi02-test.c | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+), 4 deletions(-) diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c index 7c94c3adef..32aba9a771 100644 --- a/hw/block/pflash_cfi02.c +++ b/hw/block/pflash_cfi02.c @@ -61,8 +61,9 @@ do { = \ */ #define PFLASH_MAX_ERASE_REGIONS 4 =20 -/* Special write cycle for CFI queries. */ +/* Special write cycles for CFI queries. */ #define WCYCLE_CFI 7 +#define WCYCLE_AUTOSELECT_CFI 8 =20 struct PFlashCFI02 { /*< private >*/ @@ -329,6 +330,12 @@ static void pflash_write(void *opaque, hwaddr offset, = uint64_t value, DPRINTF("%s: flash reset asked (%02x %02x)\n", __func__, pfl->cmd, cmd); #endif + if (pfl->wcycle =3D=3D WCYCLE_AUTOSELECT_CFI) { + /* Return to autoselect mode. */ + pfl->wcycle =3D 3; + pfl->cmd =3D 0x90; + return; + } goto reset_flash; } } @@ -354,7 +361,6 @@ static void pflash_write(void *opaque, hwaddr offset, u= int64_t value, /* We're in read mode */ check_unlock0: if (masked_addr =3D=3D 0x55 && cmd =3D=3D 0x98) { - enter_CFI_mode: /* Enter CFI query mode */ pfl->wcycle =3D WCYCLE_CFI; pfl->cmd =3D 0x98; @@ -431,9 +437,15 @@ static void pflash_write(void *opaque, hwaddr offset, = uint64_t value, /* Unlock bypass reset */ goto reset_flash; } - /* We can enter CFI query mode from autoselect mode */ + /* + * We can enter CFI query mode from autoselect mode, but we mu= st + * return to autoselect mode after a reset. + */ if (masked_addr =3D=3D 0x55 && cmd =3D=3D 0x98) { - goto enter_CFI_mode; + /* Enter autoselect CFI query mode */ + pfl->wcycle =3D WCYCLE_AUTOSELECT_CFI; + pfl->cmd =3D 0x98; + return; } /* No break here */ default: @@ -514,6 +526,7 @@ static void pflash_write(void *opaque, hwaddr offset, u= int64_t value, } break; case WCYCLE_CFI: /* Special value for CFI queries */ + case WCYCLE_AUTOSELECT_CFI: DPRINTF("%s: invalid write in CFI query mode\n", __func__); goto reset_flash; default: diff --git a/tests/pflash-cfi02-test.c b/tests/pflash-cfi02-test.c index c16118e38b..c984295167 100644 --- a/tests/pflash-cfi02-test.c +++ b/tests/pflash-cfi02-test.c @@ -437,6 +437,39 @@ static void test_geometry(const void *opaque) qtest_quit(global_qtest); } =20 +/* + * Test that + * 1. enter autoselect mode; + * 2. enter CFI mode; and then + * 3. exit CFI mode + * leaves the flash device in autoselect mode. + */ +static void test_cfi_in_autoselect(const void *opaque) +{ + const FlashConfig *c =3D opaque; + global_qtest =3D qtest_initf("-M musicpal,accel=3Dqtest" + " -drive if=3Dpflash,file=3D%s,format=3Draw= ," + "copy-on-read", + image_path); + + /* 1. Enter autoselect. */ + unlock(c); + flash_cmd(c, UNLOCK0_ADDR, AUTOSELECT_CMD); + g_assert_cmpint(flash_query(c, FLASH_ADDR(0)), =3D=3D, replicate(c, 0x= BF)); + + /* 2. Enter CFI. */ + flash_cmd(c, CFI_ADDR, CFI_CMD); + g_assert_cmpint(flash_query(c, FLASH_ADDR(0x10)), =3D=3D, replicate(c,= 'Q')); + g_assert_cmpint(flash_query(c, FLASH_ADDR(0x11)), =3D=3D, replicate(c,= 'R')); + g_assert_cmpint(flash_query(c, FLASH_ADDR(0x12)), =3D=3D, replicate(c,= 'Y')); + + /* 3. Exit CFI. */ + reset(c); + g_assert_cmpint(flash_query(c, FLASH_ADDR(0)), =3D=3D, replicate(c, 0x= BF)); + + qtest_quit(global_qtest); +} + static void cleanup(void *opaque) { unlink(image_path); @@ -560,6 +593,9 @@ int main(int argc, char **argv) qtest_add_data_func(path, config, test_geometry); g_free(path); } + + qtest_add_data_func("pflash-cfi02/cfi-in-autoselect", &configuration[0= ], + test_cfi_in_autoselect); int result =3D g_test_run(); cleanup(NULL); return result; --=20 2.20.1 (Apple Git-117)