From patchwork Mon Jul 29 04:36:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Park, Aiden" X-Patchwork-Id: 1138129 X-Patchwork-Delegate: bmeng.cn@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 45xn5F31y1z9s7T for ; Mon, 29 Jul 2019 14:38:57 +1000 (AEST) Received: by lists.denx.de (Postfix, from userid 105) id CDA4DC21DDC; Mon, 29 Jul 2019 04:37:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id 3C892C21D56; Mon, 29 Jul 2019 04:36:30 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 3A34FC21D56; Mon, 29 Jul 2019 04:36:14 +0000 (UTC) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lists.denx.de (Postfix) with ESMTPS id E30FFC21D83 for ; Mon, 29 Jul 2019 04:36:07 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Jul 2019 21:36:06 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,321,1559545200"; d="scan'208";a="195199712" Received: from orsmsx110.amr.corp.intel.com ([10.22.240.8]) by fmsmga004.fm.intel.com with ESMTP; 28 Jul 2019 21:36:05 -0700 Received: from orsmsx152.amr.corp.intel.com (10.22.226.39) by ORSMSX110.amr.corp.intel.com (10.22.240.8) with Microsoft SMTP Server (TLS) id 14.3.439.0; Sun, 28 Jul 2019 21:36:05 -0700 Received: from orsmsx116.amr.corp.intel.com ([169.254.7.85]) by ORSMSX152.amr.corp.intel.com ([169.254.8.114]) with mapi id 14.03.0439.000; Sun, 28 Jul 2019 21:36:05 -0700 From: "Park, Aiden" To: Bin Meng , Andy Shevchenko , U-Boot Mailing List , Simon Glass Thread-Topic: [PATCH v7 5/9] x86: slimbootloader: Add serial driver Thread-Index: AdVFxnjat7X35w4kRBSWpDHvRjPJoA== Date: Mon, 29 Jul 2019 04:36:04 +0000 Message-ID: Accept-Language: ko-KR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-product: dlpe-windows dlp-version: 11.0.400.15 dlp-reaction: no-action x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiYzUwYjIyMmItY2Q1NS00MTA1LWFlOWEtNzg0ZmQ5MDIyYjY2IiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjEwLjE4MDQuNDkiLCJUcnVzdGVkTGFiZWxIYXNoIjoiY2hOc3NmZEN5OFpzMEdmVGtqZE5LQmNrT0ZJRW5RZFFjQTkxXC9DM0NmcUk1clFmckhKUUozVlhkMXNVellocXIifQ== x-ctpclassification: CTP_NT x-originating-ip: [10.22.254.138] MIME-Version: 1.0 Subject: [U-Boot] [PATCH v7 5/9] x86: slimbootloader: Add serial driver X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" Slim Bootloader provides serial port info thru its HOB list pointer. All these HOBs are eligible for Slim Bootloader based board only. - Get serial port information from the serial port info HOB - Leverage ns16550 driver with slimbootloader specific platform data Signed-off-by: Aiden Park Reviewed-by: Bin Meng Reviewed-by: Andy Shevchenko --- Changes in v6: * Use EFI_GUID * Apply code-review comments Changes in v4: * Add static keyword in static function Changes in v3: * Use HOB function from the common HOB library arch/x86/cpu/slimbootloader/Makefile | 2 +- arch/x86/cpu/slimbootloader/serial.c | 67 +++++++++++++++++++ .../asm/arch-slimbootloader/slimbootloader.h | 34 ++++++++++ 3 files changed, 102 insertions(+), 1 deletion(-) create mode 100644 arch/x86/cpu/slimbootloader/serial.c diff --git a/arch/x86/cpu/slimbootloader/Makefile b/arch/x86/cpu/slimbootloader/Makefile index 9e6822a6ec..aac9fa3db8 100644 --- a/arch/x86/cpu/slimbootloader/Makefile +++ b/arch/x86/cpu/slimbootloader/Makefile @@ -2,4 +2,4 @@ # # Copyright (C) 2019 Intel Corporation -obj-y += car.o slimbootloader.o sdram.o +obj-y += car.o slimbootloader.o sdram.o serial.o diff --git a/arch/x86/cpu/slimbootloader/serial.c b/arch/x86/cpu/slimbootloader/serial.c new file mode 100644 index 0000000000..7b44a59bff --- /dev/null +++ b/arch/x86/cpu/slimbootloader/serial.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Intel Corporation + */ + +#include +#include +#include +#include +#include + +/** + * The serial port info hob is generated by Slim Bootloader, so eligible for + * Slim Bootloader based boards only. + */ +static int slimbootloader_serial_ofdata_to_platdata(struct udevice *dev) +{ + const efi_guid_t guid = SBL_SERIAL_PORT_INFO_GUID; + struct sbl_serial_port_info *data; + struct ns16550_platdata *plat = dev->platdata; + + if (!gd->arch.hob_list) + panic("hob list not found!"); + + data = hob_get_guid_hob_data(gd->arch.hob_list, NULL, &guid); + if (!data) { + debug("failed to get serial port information\n"); + return -ENOENT; + } + debug("type:%d base=0x%08x baudrate=%d stride=%d clk=%d\n", + data->type, + data->base, + data->baud, + data->stride, + data->clk); + + /* + * The data->type provides port io or mmio access type info, + * but the access type will be controlled by + * CONFIG_SYS_NS16550_PORT_MAPPED or CONFIG_SYS_NS16550_MEM32. + * + * TBD: ns16550 access type configuration in runtime. + * ex) plat->access_type = data->type + */ + plat->base = data->base; + /* ns16550 uses reg_shift, then covert stride to shift */ + plat->reg_shift = data->stride >> 1; + plat->clock = data->clk; + + return 0; +} + +static const struct udevice_id slimbootloader_serial_ids[] = { + { .compatible = "intel,slimbootloader-uart" }, + {} +}; + +U_BOOT_DRIVER(serial_slimbootloader) = { + .name = "serial_slimbootloader", + .id = UCLASS_SERIAL, + .of_match = slimbootloader_serial_ids, + .ofdata_to_platdata = slimbootloader_serial_ofdata_to_platdata, + .platdata_auto_alloc_size = sizeof(struct ns16550_platdata), + .priv_auto_alloc_size = sizeof(struct NS16550), + .probe = ns16550_serial_probe, + .ops = &ns16550_serial_ops, +}; diff --git a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h index 4ee8a0627e..174a341d32 100644 --- a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h +++ b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h @@ -16,6 +16,13 @@ EFI_GUID(0xa1ff7424, 0x7a1a, 0x478e, \ 0xa9, 0xe4, 0x92, 0xf3, 0x57, 0xd1, 0x28, 0x32) +/** + * A GUID to get SerialPort info hob which is provided by Slim Bootloader + */ +#define SBL_SERIAL_PORT_INFO_GUID \ + EFI_GUID(0x6c6872fe, 0x56a9, 0x4403, \ + 0xbb, 0x98, 0x95, 0x8d, 0x62, 0xde, 0x87, 0xf1) + /** * A single entry of memory map information * @@ -50,4 +57,31 @@ struct sbl_memory_map_info { struct sbl_memory_map_entry entry[0]; }; +/** + * This includes serial port info which has already been initialized in previous + * Slim Bootloader stage. + * The Slim Bootloader initializes serial port regardless of debug/release build + * modes, and it passes the information to a payload thru hob. So, a payload can + * re-use the serial information without re-initializing serial port. + * + * @rev : revision of serial_port_info structure. currently 1. + * @rsvd : padding for alignment + * @type : port io: 1, mmio: 2 + * @base : io base address. ex) 0x3f8, 0x80001000 + * @baud : uart baud rate + * @stride: register stride in Bytes + * @clk : uart frequency in Hz + * @rsvd1 : reserved + */ +struct sbl_serial_port_info { + u8 rev; + u8 rsvd[3]; + u32 type; + u32 base; + u32 baud; + u32 stride; + u32 clk; + u32 rsvd1; +}; + #endif /* __SLIMBOOTLOADER_ARCH_H__ */