From patchwork Mon Jan 14 21:16:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Belloni X-Patchwork-Id: 10763441 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C9B2613BF for ; Mon, 14 Jan 2019 21:16:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A8C402AE15 for ; Mon, 14 Jan 2019 21:16:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A6E192AF1B; Mon, 14 Jan 2019 21:16:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CB5552AF1F for ; Mon, 14 Jan 2019 21:16:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=swtfADPNbNTd6c9sMEPmXmNAAzE/0eHVg8V/9nuIZCA=; b=dB/wV0AxrJF78P yjvyBxZZriP6/QxeVwZdYD6s8cjhLkepy8VYr4VMxhzDM/UKuXeQ6vBtD9QtGRq+6AGDAAAd2p1Dm 3qgDix4rrmaoakxNnLo/gTFDSdD447OoziW7tfn6qhuyk8Co17cUiLqtVat8D6ora9I9U3b4Gl6cL Mw4nYA0Osxvzw0TLRnZ+hOhR0fydjCA0k47czDyeYxS7zSZ5LOdPBV61R9o1W/YX5NZ0YGOYd565Y 5UTIvJHJZ3THbhyGgtdWYzzYl6a8b1GQ55aw9tjgQq5N6Ypc6XAMEULo3MdLDbsJWdaZQ/EQE8uqJ zuzoXDScFcWGTe53KBAA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gj9bJ-0006ta-1Y; Mon, 14 Jan 2019 21:16:53 +0000 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gj9bF-0006sZ-Fk for linux-arm-kernel@lists.infradead.org; Mon, 14 Jan 2019 21:16:51 +0000 Received: by mail.bootlin.com (Postfix, from userid 110) id 5454820955; Mon, 14 Jan 2019 22:16:41 +0100 (CET) Received: from localhost (lfbn-1-17122-186.w86-248.abo.wanadoo.fr [86.248.186.186]) by mail.bootlin.com (Postfix) with ESMTPSA id 21E9620784; Mon, 14 Jan 2019 22:16:31 +0100 (CET) From: Alexandre Belloni To: Vladimir Zapolskiy , Sylvain Lemieux Subject: [PATCH] ARM: lpc32xx: debug: add low-level debug support on hsuart Date: Mon, 14 Jan 2019 22:16:23 +0100 Message-Id: <20190114211623.6069-1-alexandre.belloni@bootlin.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190114_131649_803453_E8A1DCF7 X-CRM114-Status: GOOD ( 11.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexandre Belloni , linux-arm-kernel@lists.infradead.org, Thomas Petazzoni , linux-kernel@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The lpc32xx has UARTs that are not 8250 compatible. Add support for low level debugging on those high speed UARTs. Signed-off-by: Alexandre Belloni --- arch/arm/Kconfig.debug | 18 +++++++++++++++--- arch/arm/include/debug/lpc32xx_hsuart.S | 22 ++++++++++++++++++++++ 2 files changed, 37 insertions(+), 3 deletions(-) create mode 100644 arch/arm/include/debug/lpc32xx_hsuart.S diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 6d6e0330930b..0d4d64f5d3b7 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -530,7 +530,16 @@ choice select DEBUG_UART_8250 help Say Y here if you want kernel low-level debugging support - on NXP LPC32xx based platforms. + on NXP LPC32xx based platforms using an INS16Cx50 compatible + UART. + + config DEBUG_LPC32XX_HSUART + bool "Kernel low-level debugging messages via NXP LPC32xx High Speed UART" + depends on ARCH_LPC32XX + help + Say Y here if you want kernel low-level debugging support + on NXP LPC32xx based platforms using an high speed (14-clock) + UART. config DEBUG_MESON_UARTAO bool "Kernel low-level debugging via Meson6 UARTAO" @@ -1541,6 +1550,7 @@ config DEBUG_LL_INCLUDE DEBUG_IMX6UL_UART || \ DEBUG_IMX7D_UART default "debug/ks8695.S" if DEBUG_KS8695_UART + default "debug/lpc32xx_hsuart.S" if DEBUG_LPC32XX_HSUART default "debug/msm.S" if DEBUG_QCOM_UARTDM default "debug/netx.S" if DEBUG_NETX_UART default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART @@ -1622,6 +1632,7 @@ config DEBUG_UART_PHYS default 0x3e000000 if DEBUG_BCM_KONA_UART default 0x3f201000 if DEBUG_BCM2836 default 0x4000e400 if DEBUG_LL_UART_EFM32 + default 0x40014000 if DEBUG_LPC32XX_HSUART default 0x40028000 if DEBUG_AT91_SAMV7_USART1 default 0x40081000 if DEBUG_LPC18XX_UART0 default 0x40090000 if DEBUG_LPC32XX @@ -1716,7 +1727,7 @@ config DEBUG_UART_PHYS DEBUG_S3C64XX_UART || \ DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \ DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \ - DEBUG_AT91_UART + DEBUG_AT91_UART || DEBUG_LPC32XX_HSUART config DEBUG_UART_VIRT hex "Virtual base address of debug UART" @@ -1741,6 +1752,7 @@ config DEBUG_UART_VIRT default 0xf1c28400 if DEBUG_SUNXI_UART1 default 0xf1f02800 if DEBUG_SUNXI_R_UART default 0xf31004c0 if DEBUG_MESON_UARTAO + default 0xf4014000 if DEBUG_LPC32XX_HSUART default 0xf4090000 if DEBUG_LPC32XX default 0xf4200000 if DEBUG_GEMINI default 0xf6200000 if DEBUG_PXA_UART1 @@ -1832,7 +1844,7 @@ config DEBUG_UART_VIRT DEBUG_S3C64XX_UART || \ DEBUG_BCM63XX_UART || DEBUG_ASM9260_UART || \ DEBUG_SIRFSOC_UART || DEBUG_DIGICOLOR_UA0 || \ - DEBUG_AT91_UART + DEBUG_AT91_UART || DEBUG_LPC32XX_HSUART config DEBUG_UART_8250_SHIFT int "Register offset shift for the 8250 debug UART" diff --git a/arch/arm/include/debug/lpc32xx_hsuart.S b/arch/arm/include/debug/lpc32xx_hsuart.S new file mode 100644 index 000000000000..e0205368c6ff --- /dev/null +++ b/arch/arm/include/debug/lpc32xx_hsuart.S @@ -0,0 +1,22 @@ +#define LPC_HSU_TX (0x0) +#define LPC_HSU_LEVEL (0x4) +#define LPC_HSU_LEVEL_TX 0xFF00 + + .macro addruart, rp, rv, tmp + ldr \rp, =CONFIG_DEBUG_UART_PHYS @ System peripherals (phys address) + ldr \rv, =CONFIG_DEBUG_UART_VIRT @ System peripherals (virt address) + .endm + + .macro senduart,rd,rx + str \rd, [\rx, #(LPC_HSU_TX)] + .endm + + .macro waituart,rd,rx + .endm + + .macro busyuart,rd,rx +1001: ldr \rd, [\rx, #(LPC_HSU_LEVEL)] + ands \rd, \rd, LPC_HSU_LEVEL_TX + bne 1001b + .endm +