From nobody Wed Dec 17 08:23:53 2025 Received: from mx1.sberdevices.ru (mx2.sberdevices.ru [45.89.224.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE8471A2FD2 for ; Mon, 17 Jun 2024 13:35:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.89.224.132 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718631333; cv=none; b=jaFiY77c6mL7NG9mfe/Yg+NpxAHPLQlAUq2h0f/OyKKxySqAbcuv7b1jdaepqxRJwuFsNexJbOuL7FCKCYz7UWWbk79gQyiBVlWFH1omnM4JIIsAJLaprCJo3Jp0/ahGKGTVVxEeHJiyMI0RYRVBQJKSoUtfAQnyVxJng6DV42A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718631333; c=relaxed/simple; bh=I2xX5u+UMBg41/s6mOj4KmE/IyEX9gwKjikWs3IJx4c=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=c7rbsqvKbEUrImXjH8qoHMYkduoSfnl6q8MKpnlNqZ8iMLIftHH0fEpVE3hIgkMDZTh9mSNRIydqUaU262yZmYiRbYKGFJOLRq3XjFCliafjKuGZhdTC0oE0i52TAsGcLZ8q6GpYPTbiRPVpXYs+1YYnSrx6DNGdkPRmsAw/Z5M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=salutedevices.com; spf=pass smtp.mailfrom=salutedevices.com; dkim=pass (2048-bit key) header.d=salutedevices.com header.i=@salutedevices.com header.b=B42RruPx; arc=none smtp.client-ip=45.89.224.132 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=salutedevices.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=salutedevices.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=salutedevices.com header.i=@salutedevices.com header.b="B42RruPx" Received: from p-infra-ksmg-sc-msk02.sberdevices.ru (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id 5913812000C; Mon, 17 Jun 2024 16:35:23 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru 5913812000C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=salutedevices.com; s=mail; t=1718631323; bh=/PdmQDr5X1ZUQQlzbIxZZmM5eEFyv/yRCGrGua+f4yo=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=B42RruPxDcQ7Qnmb1F2d92k0TDLMQae2lgOBpkj0qKyN/yxq2T99FyelQKXt7Aa1n nIrmyq6gHFleC+UrmJC2ZIcTiBOZE4ItxeyTBP9UWBVSeDZ+mOrCaWPlPcE6YQi0vi VnlkiUgkBuTH3zDGc5AJM45SBO2kVark8wPT5wsUAUiU6axjcW3o/27xDTfsWJ5B7s OjtlYHnC3jm871sRUffltz8JB1sCyYvEQcF2vMD+5uZV/NoQ0YWFlWDJlspV1AgQql vkC5ajsTXkQAHa6+q2ZB6gYW9Prk3P8fEYD1Cm7DxBQrRl7xa2CAi5e+4RPFFF6aah R7f+j0wlL/TwA== Received: from smtp.sberdevices.ru (p-i-exch-sc-m02.sberdevices.ru [172.16.192.103]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Mon, 17 Jun 2024 16:35:23 +0300 (MSK) Received: from CAB-WSD-0004828.sberdevices.ru (100.64.160.123) by p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 17 Jun 2024 16:35:22 +0300 From: Martin Kurbanov To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mika Westerberg , Michael Walle , Mark Brown , Chia-Lin Kao , Md Sadre Alam , Ezra Buehler , Sridharan S N , Frieder Schrempf , Alexey Romanov CC: , , , Martin Kurbanov Subject: [PATCH v1 4/5] mtd: spinand: micron: OTP access for MT29F2G01ABAGD Date: Mon, 17 Jun 2024 16:34:56 +0300 Message-ID: <20240617133504.179705-5-mmkurbanov@salutedevices.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240617133504.179705-1-mmkurbanov@salutedevices.com> References: <20240617133504.179705-1-mmkurbanov@salutedevices.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) To p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 185966 [Jun 17 2024] X-KSMG-AntiSpam-Version: 6.1.0.4 X-KSMG-AntiSpam-Envelope-From: mmkurbanov@salutedevices.com X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 20 0.3.20 743589a8af6ec90b529f2124c2bbfc3ce1d2f20f, {Tracking_from_domain_doesnt_match_to}, 100.64.160.123:7.1.2;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1;salutedevices.com:7.1.1;smtp.sberdevices.ru:7.1.1,5.0.1;127.0.0.199:7.1.2, FromAlignment: s, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2024/06/17 12:47:00 #25641689 X-KSMG-AntiVirus-Status: Clean, skipped Content-Type: text/plain; charset="utf-8" Support for OTP area access on Micron MT29F2G01ABAGD chip. Signed-off-by: Martin Kurbanov --- drivers/mtd/nand/spi/micron.c | 117 +++++++++++++++++++++++++++++++++- 1 file changed, 116 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c index 8d741be6d5f3e..a538409db4ccd 100644 --- a/drivers/mtd/nand/spi/micron.c +++ b/drivers/mtd/nand/spi/micron.c @@ -9,6 +9,7 @@ #include #include #include +#include =20 #define SPINAND_MFR_MICRON 0x2c =20 @@ -28,6 +29,16 @@ =20 #define MICRON_SELECT_DIE(x) ((x) << 6) =20 +#define MICRON_MT29F2G01ABAGD_OTP_PAGES 12 +#define MICRON_MT29F2G01ABAGD_OTP_PAGE_SIZE 2176 +#define MICRON_MT29F2G01ABAGD_OTP_SIZE_BYTES \ + (MICRON_MT29F2G01ABAGD_OTP_PAGES * \ + MICRON_MT29F2G01ABAGD_OTP_PAGE_SIZE) + +#define MICRON_MT29F2G01ABAGD_CFG_OTP_STATE BIT(7) +#define MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK \ + (CFG_OTP_ENABLE | MICRON_MT29F2G01ABAGD_CFG_OTP_STATE) + static SPINAND_OP_VARIANTS(quadio_read_cache_variants, //SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), @@ -182,6 +193,108 @@ static int micron_8_ecc_get_status(struct spinand_dev= ice *spinand, return -EINVAL; } =20 +static int mt29f2g01abagd_otp_is_locked(struct spinand_device *spinand) +{ + size_t buf_size =3D MICRON_MT29F2G01ABAGD_OTP_PAGE_SIZE; + size_t retlen; + u8 *buf; + int ret; + + buf =3D kmalloc(buf_size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + ret =3D spinand_upd_cfg(spinand, + MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK, + MICRON_MT29F2G01ABAGD_CFG_OTP_STATE); + if (ret) + goto out; + + ret =3D spinand_otp_read(spinand, 0, buf_size, buf, &retlen); + + if (spinand_upd_cfg(spinand, MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK, + 0)) { + WARN(1, "Can not disable OTP mode\n"); + ret =3D -EIO; + } + + if (!ret) { + size_t i =3D 0; + + /* If all zeros, then the OTP area is locked. */ + while (i < buf_size && *(uint32_t *)(&buf[i]) =3D=3D 0) + i +=3D 4; + + if (i =3D=3D buf_size) + ret =3D 1; + } + +out: + kfree(buf); + return ret; +} + +static int mt29f2g01abagd_otp_info(struct spinand_device *spinand, size_t = len, + struct otp_info *buf, size_t *retlen) +{ + int locked; + + if (len < sizeof(*buf)) + return -EINVAL; + + locked =3D mt29f2g01abagd_otp_is_locked(spinand); + if (locked < 0) + return locked; + + buf->locked =3D locked; + buf->start =3D 0; + buf->length =3D MICRON_MT29F2G01ABAGD_OTP_SIZE_BYTES; + + *retlen =3D sizeof(*buf); + return 0; +} + +static int mt29f2g01abagd_otp_lock(struct spinand_device *spinand, loff_t = from, + size_t len) +{ + struct spi_mem_op write_op =3D SPINAND_WR_EN_DIS_OP(true); + struct spi_mem_op exec_op =3D SPINAND_PROG_EXEC_OP(0); + int ret; + + ret =3D spinand_upd_cfg(spinand, + MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK, + MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK); + if (!ret) + return ret; + + ret =3D spi_mem_exec_op(spinand->spimem, &write_op); + if (!ret) + goto out; + + ret =3D spi_mem_exec_op(spinand->spimem, &exec_op); + if (!ret) + goto out; + + ret =3D spinand_wait(spinand, 10, 5, NULL); + if (!ret) + goto out; + +out: + if (spinand_upd_cfg(spinand, MICRON_MT29F2G01ABAGD_CFG_OTP_LOCK, 0)) { + WARN(1, "Can not disable OTP mode\n"); + ret =3D -EIO; + } + + return ret; +} + +static const struct spinand_otp_ops mt29f2g01abagd_otp_ops =3D { + .info =3D mt29f2g01abagd_otp_info, + .lock =3D mt29f2g01abagd_otp_lock, + .read =3D spinand_otp_read, + .write =3D spinand_otp_write, +}; + static const struct spinand_info micron_spinand_table[] =3D { /* M79A 2Gb 3.3V */ SPINAND_INFO("MT29F2G01ABAGD", @@ -193,7 +306,9 @@ static const struct spinand_info micron_spinand_table[]= =3D { &x4_update_cache_variants), 0, SPINAND_ECCINFO(µn_8_ooblayout, - micron_8_ecc_get_status)), + micron_8_ecc_get_status), + SPINAND_OTP_INFO(MICRON_MT29F2G01ABAGD_OTP_PAGES, + &mt29f2g01abagd_otp_ops)), /* M79A 2Gb 1.8V */ SPINAND_INFO("MT29F2G01ABBGD", SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x25), --=20 2.43.2