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[208.66.210.181]) by smtp.gmail.com with ESMTPSA id y203sm5969838itb.22.2019.04.08.19.03.31 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 08 Apr 2019 19:03:31 -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=Fv5fB8GVOlQA6/nl/SV+rrrwTraGemNdwfTmaMiR9Mg=; b=1aAOfbh16dPsGkRMJiuTMMgggdg9ZKqPU4qqiu9Fxj/IjRb0L5UJ0vqIMg4ZtlxM0m SYxQZtMIo8tgkhxKgr8wzDxFeFaWFxnDl9BfFqIx+pQryItsfoLETiWH7WUIU88xFiOX 3+wIUFW49MbI8NXb55m3Z2fhjDu03+r3u+4508SDgSpaj/G4MTPjKdOvZX+snMKK2K2d +tSkVZNOkRY4NbEROf4JK//3KpuWqvyTu5VejRK0RywjQ8VL2H0ZjhxDzFvfPMeB/vWa fZ1WgB6Q7ZIbvp41DECZBKgIJW5ZvqCCdtRG+zlskctuG3FL5mR1qkRxG57Vcwlv1VX/ zPMw== 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=Fv5fB8GVOlQA6/nl/SV+rrrwTraGemNdwfTmaMiR9Mg=; b=rUPUJKCUjRiik9rG8+p915mVviAEdqVkcUdk3u9KexZ8GHFrt7J/9Z5iSrbV0uefAi iM4Y6fmpzZ1rbL9cn6d/HTmVIz0IOLZwAz8eVcQq4oU661r/uKXHYKc/RRzakuWqHeoT 7wFaf7hRS3uvYxnYElr/mlzQBb8J7NfHXo858OUWerbk167MZqqB6YULr9z5XOIHgpA+ EmuZN270xyjL0kdiYIzNUDC1N/tCmKTQX4uL34ZYeafDYfcgrnmSQPyaSdKXrB+ak6Ia rbgQZjVkmYHFv34qc6vC7aQyPrlEnB/ykq0zXEt34e2TovMCqvC7gNid2qBH8Jxp/Ojz WWHg== X-Gm-Message-State: APjAAAVdPEWM0aP4FwwdJoALtl8NgZiDNMAOOnRKigUvf093uGK+h87V LCf/Tb3ajVOPxn71+Z+sY9N/ITdm1e00CA== X-Google-Smtp-Source: APXvYqzc0kW7Yk3J6D1IjRlLkg4kv26r40WdjztL2Xw/NyquTzslM89tfnxc7zULj88KnantyDJ7xw== X-Received: by 2002:a5e:8f04:: with SMTP id c4mr23661236iok.131.1554775412474; Mon, 08 Apr 2019 19:03:32 -0700 (PDT) From: Stephen Checkoway To: qemu-devel@nongnu.org Date: Mon, 8 Apr 2019 22:01:30 -0400 Message-Id: <871e55199edc5c1ae1e5cb80e076a211d76c5a77.1554774454.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::d30 Subject: [Qemu-devel] [PATCH v2 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 c4efbe8cdf..be10036886 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 >*/ @@ -325,6 +326,12 @@ static void pflash_write(void *opaque, hwaddr offset, = uint64_t value, } =20 if (cmd =3D=3D 0xF0) { + if (pfl->wcycle =3D=3D WCYCLE_AUTOSELECT_CFI) { + /* Return to autoselect mode. */ + pfl->wcycle =3D 3; + pfl->cmd =3D 0x90; + return; + } goto reset_flash; } } @@ -350,7 +357,6 @@ 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; @@ -427,9 +433,15 @@ 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: @@ -510,6 +522,7 @@ 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 dc85783a6a..ae1cd4e54b 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); @@ -562,6 +595,9 @@ 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)