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[144.168.56.201]) by smtp.gmail.com with ESMTPSA id t6sm4245080pfc.64.2021.01.27.22.30.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Jan 2021 22:30:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=vM1qdMkN6F77URC3NRV2IHY8+Dmwaotpvyy9SZ1Xe3c=; b=F0bAViwOlcqC7i/lSgAX3JVuEsy6b3lLJr/LDHmuR5n9hSC11Ta70osVceQrQgY1TB vK4oSO+cu+W//UCbputsy+fWwGmwqU7I9EzDP5JxTOe2cy3xmysX7AVNgyH8n89Ee7sG GPWLWGM8VGsKDIDHwYhL48clfdPM0yMiyO38X6EdYupLfzgB/2a/AaiI5wB3CYnVcsnq ckFQ4g0Rp39NSI3Puongxy9Zc5mFnIikDlF0oXid4izgmbyBaQ3UCyjxMlV6quPBSrhG AIQZ731iwV5XrnPenjXOsg17kUX6+bz2Is5jV/XMCafxx8+hFsXzwBe0kYOrLO3tBb69 9v2g== 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=vM1qdMkN6F77URC3NRV2IHY8+Dmwaotpvyy9SZ1Xe3c=; b=bcp6rYcBHv40CRXKY6cmnd4faLoFMZahBlu49g1GfFtsv+IqswCAZZWss1fo5EOFJI vzjQNVKLmI77bQKfqhwQfxvnuXtwyZCRQH/n29Hgrp+d7XPfOG98QDVxIgZESAgRbvAC Rnu2KQEaetsDLEHpedQkCz8yUt012DZoQIkmOBUElCHtc7kIyT22FNu0i+JwQwSw9Qzu zAUr/E+s4/OUgEvZKTdKJK4A9niNTGfiK3F2G5scukcOW9oTv4drQkkCBuPlc8dGQDsB JBrOfF4ul6TkOrLpv1XNjmJN5mY8MEgI3QPT/3n1o0xj8WdHNWuy/O6D08U/n3ZLjm8j Thhg== X-Gm-Message-State: AOAM532GviKrsoEEEDD5AEhpwgfup2YukYLIvRWkG5jVj8XV9T0WnhoK yuM7Q94+C3jvlUQ9CFd3uww= X-Google-Smtp-Source: ABdhPJyVKtWH2X1n+PNI9/hQ3OoET0X3ZbNAiKGTbdhHHu11NkDtn6fSMbn6tLiwb9Z5ScgdwBrzyg== X-Received: by 2002:a17:903:228e:b029:de:2bee:150d with SMTP id b14-20020a170903228eb02900de2bee150dmr15269880plh.18.1611815446427; Wed, 27 Jan 2021 22:30:46 -0800 (PST) From: Bin Meng To: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , qemu-block@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH v4 1/9] hw/sd: ssi-sd: Support multiple block read Date: Thu, 28 Jan 2021 14:30:27 +0800 Message-Id: <20210128063035.15674-2-bmeng.cn@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210128063035.15674-1-bmeng.cn@gmail.com> References: <20210128063035.15674-1-bmeng.cn@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::62f; envelope-from=bmeng.cn@gmail.com; helo=mail-pl1-x62f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Bin Meng , Alistair Francis Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @gmail.com) From: Bin Meng In the case of a multiple block read operation every transferred block has its suffix of CRC16. Update the state machine logic to handle multiple block read. Signed-off-by: Bin Meng Acked-by: Alistair Francis [PMD: Change VMState version id 5 -> 6] Signed-off-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 --- (no changes since v1) hw/sd/ssi-sd.c | 42 +++++++++++++++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 9 deletions(-) diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c index be1bb10164..6d20a240c6 100644 --- a/hw/sd/ssi-sd.c +++ b/hw/sd/ssi-sd.c @@ -52,6 +52,7 @@ struct ssi_sd_state { uint8_t cmdarg[4]; uint8_t response[5]; uint16_t crc16; + int32_t read_bytes; int32_t arglen; int32_t response_pos; int32_t stopping; @@ -88,11 +89,26 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uin= t32_t val) { ssi_sd_state *s =3D SSI_SD(dev); =20 - /* Special case: allow CMD12 (STOP TRANSMISSION) while reading data. = */ - if (s->mode =3D=3D SSI_SD_DATA_READ && val =3D=3D 0x4c) { - s->mode =3D SSI_SD_CMD; - /* There must be at least one byte delay before the card responds.= */ - s->stopping =3D 1; + /* + * Special case: allow CMD12 (STOP TRANSMISSION) while reading data. + * + * See "Physical Layer Specification Version 8.00" chapter 7.5.2.2, + * to avoid conflict between CMD12 response and next data block, + * timing of CMD12 should be controlled as follows: + * + * - CMD12 issued at the timing that end bit of CMD12 and end bit of + * data block is overlapped + * - CMD12 issued after one clock cycle after host receives a token + * (either Start Block token or Data Error token) + * + * We need to catch CMD12 in all of the data read states. + */ + if (s->mode >=3D SSI_SD_PREP_DATA && s->mode <=3D SSI_SD_DATA_CRC16) { + if (val =3D=3D 0x4c) { + s->mode =3D SSI_SD_CMD; + /* There must be at least one byte delay before the card respo= nds */ + s->stopping =3D 1; + } } =20 switch (s->mode) { @@ -212,8 +228,9 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, uin= t32_t val) return SSI_TOKEN_SINGLE; case SSI_SD_DATA_READ: val =3D sdbus_read_byte(&s->sdbus); + s->read_bytes++; s->crc16 =3D crc_ccitt_false(s->crc16, (uint8_t *)&val, 1); - if (!sdbus_data_ready(&s->sdbus)) { + if (!sdbus_data_ready(&s->sdbus) || s->read_bytes =3D=3D 512) { DPRINTF("Data read end\n"); s->mode =3D SSI_SD_DATA_CRC16; } @@ -224,7 +241,12 @@ static uint32_t ssi_sd_transfer(SSIPeripheral *dev, ui= nt32_t val) s->response_pos++; if (s->response_pos =3D=3D 2) { DPRINTF("CRC16 read end\n"); - s->mode =3D SSI_SD_CMD; + if (s->read_bytes =3D=3D 512 && s->cmd !=3D 17) { + s->mode =3D SSI_SD_PREP_DATA; + } else { + s->mode =3D SSI_SD_CMD; + } + s->read_bytes =3D 0; s->response_pos =3D 0; } return val; @@ -255,8 +277,8 @@ static int ssi_sd_post_load(void *opaque, int version_i= d) =20 static const VMStateDescription vmstate_ssi_sd =3D { .name =3D "ssi_sd", - .version_id =3D 5, - .minimum_version_id =3D 5, + .version_id =3D 6, + .minimum_version_id =3D 6, .post_load =3D ssi_sd_post_load, .fields =3D (VMStateField []) { VMSTATE_UINT32(mode, ssi_sd_state), @@ -264,6 +286,7 @@ static const VMStateDescription vmstate_ssi_sd =3D { VMSTATE_UINT8_ARRAY(cmdarg, ssi_sd_state, 4), VMSTATE_UINT8_ARRAY(response, ssi_sd_state, 5), VMSTATE_UINT16(crc16, ssi_sd_state), + VMSTATE_INT32(read_bytes, ssi_sd_state), VMSTATE_INT32(arglen, ssi_sd_state), VMSTATE_INT32(response_pos, ssi_sd_state), VMSTATE_INT32(stopping, ssi_sd_state), @@ -316,6 +339,7 @@ static void ssi_sd_reset(DeviceState *dev) memset(s->cmdarg, 0, sizeof(s->cmdarg)); memset(s->response, 0, sizeof(s->response)); s->crc16 =3D 0; + s->read_bytes =3D 0; s->arglen =3D 0; s->response_pos =3D 0; s->stopping =3D 0; --=20 2.25.1