From patchwork Mon Feb 15 12:17:05 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hector Martin X-Patchwork-Id: 12088069 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 783B2C433E0 for ; Mon, 15 Feb 2021 12:22:37 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E3D2E64D9D for ; Mon, 15 Feb 2021 12:22:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E3D2E64D9D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=marcan.st Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: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:List-Owner; bh=61xeLEKpzIbk1YBNTpMIRlCx3TayIgZ1TLE+rNBvcI4=; b=KGc5RMzvxQgFDJK8WmPIcU/HZ BHMnWkHjhXJxT5e036kZt+de1Py2hW5afBcITnnz8eO71QHXgKXKTIfpvDIub2kydlh3w3k1uokrp IV7K6h1enLl3CpGxdFL29TZn1Jemp7CZ467+XD6QBFSfpu0dvxo2EtTEVMrCPM25hGXOkxVxa9NXu vP7FbEflgLa3GbtWEqSs6s8eItbFfecKR6LOUjlkTMVdOvesWz7GNtHu2DX07g994ee9Dz59nz1n8 m/KiapnOY6q9nVxz60ZFJnaKkHiK+zQmLvYINu8TBjUmrNXnXlEbmh9mHHPD+50+td/sjyIvmfXg7 h8Pdtvp+A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lBcs4-0006dU-W0; Mon, 15 Feb 2021 12:20:57 +0000 Received: from marcansoft.com ([212.63.210.85] helo=mail.marcansoft.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lBcqG-0005f2-6B for linux-arm-kernel@lists.infradead.org; Mon, 15 Feb 2021 12:19:05 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: hector@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id E4B0742524; Mon, 15 Feb 2021 12:18:58 +0000 (UTC) From: Hector Martin To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 17/25] tty: serial: samsung_tty: Separate S3C64XX ops structure Date: Mon, 15 Feb 2021 21:17:05 +0900 Message-Id: <20210215121713.57687-18-marcan@marcan.st> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210215121713.57687-1-marcan@marcan.st> References: <20210215121713.57687-1-marcan@marcan.st> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210215_071904_496039_889197B9 X-CRM114-Status: GOOD ( 20.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Arnd Bergmann , Rob Herring , Tony Lindgren , Marc Zyngier , Linus Walleij , Hector Martin , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , devicetree@vger.kernel.org, Alexander Graf , Olof Johansson , Mohamed Mediouni , Stan Skowronek , Will Deacon , Mark Kettenis Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Instead of patching a single global ops structure depending on the port type, use a separate s3c64xx_serial_ops for the S3C64XX type. This allows us to mark the structures as const. Also split out s3c64xx_serial_shutdown into a separate function now that we have a separate ops structure; this avoids excessive branching control flow and mirrors s3c64xx_serial_startup. tx_claimed and rx_claimed are only used in the S3C24XX functions. Signed-off-by: Hector Martin --- drivers/tty/serial/samsung_tty.c | 69 ++++++++++++++++++++++++-------- 1 file changed, 53 insertions(+), 16 deletions(-) diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 8ae3e03fbd8c..6b661f3ec1ae 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -1098,27 +1098,36 @@ static void s3c24xx_serial_shutdown(struct uart_port *port) struct s3c24xx_uart_port *ourport = to_ourport(port); if (ourport->tx_claimed) { - if (!s3c24xx_serial_has_interrupt_mask(port)) - free_irq(ourport->tx_irq, ourport); + free_irq(ourport->tx_irq, ourport); ourport->tx_enabled = 0; ourport->tx_claimed = 0; ourport->tx_mode = 0; } if (ourport->rx_claimed) { - if (!s3c24xx_serial_has_interrupt_mask(port)) - free_irq(ourport->rx_irq, ourport); + free_irq(ourport->rx_irq, ourport); ourport->rx_claimed = 0; ourport->rx_enabled = 0; } - /* Clear pending interrupts and mask all interrupts */ - if (s3c24xx_serial_has_interrupt_mask(port)) { - free_irq(port->irq, ourport); + if (ourport->dma) + s3c24xx_serial_release_dma(ourport); - wr_regl(port, S3C64XX_UINTP, 0xf); - wr_regl(port, S3C64XX_UINTM, 0xf); - } + ourport->tx_in_progress = 0; +} + +static void s3c64xx_serial_shutdown(struct uart_port *port) +{ + struct s3c24xx_uart_port *ourport = to_ourport(port); + + free_irq(port->irq, ourport); + + wr_regl(port, S3C64XX_UINTP, 0xf); + wr_regl(port, S3C64XX_UINTM, 0xf); + + ourport->tx_enabled = 0; + ourport->tx_mode = 0; + ourport->rx_enabled = 0; if (ourport->dma) s3c24xx_serial_release_dma(ourport); @@ -1193,9 +1202,7 @@ static int s3c64xx_serial_startup(struct uart_port *port) /* For compatibility with s3c24xx Soc's */ ourport->rx_enabled = 1; - ourport->rx_claimed = 1; ourport->tx_enabled = 0; - ourport->tx_claimed = 1; spin_lock_irqsave(&port->lock, flags); @@ -1631,6 +1638,29 @@ static struct uart_ops s3c24xx_serial_ops = { #endif }; +static const struct uart_ops s3c64xx_serial_ops = { + .pm = s3c24xx_serial_pm, + .tx_empty = s3c24xx_serial_tx_empty, + .get_mctrl = s3c24xx_serial_get_mctrl, + .set_mctrl = s3c24xx_serial_set_mctrl, + .stop_tx = s3c24xx_serial_stop_tx, + .start_tx = s3c24xx_serial_start_tx, + .stop_rx = s3c24xx_serial_stop_rx, + .break_ctl = s3c24xx_serial_break_ctl, + .startup = s3c64xx_serial_startup, + .shutdown = s3c64xx_serial_shutdown, + .set_termios = s3c24xx_serial_set_termios, + .type = s3c24xx_serial_type, + .release_port = s3c24xx_serial_release_port, + .request_port = s3c24xx_serial_request_port, + .config_port = s3c24xx_serial_config_port, + .verify_port = s3c24xx_serial_verify_port, +#if defined(CONFIG_SERIAL_SAMSUNG_CONSOLE) && defined(CONFIG_CONSOLE_POLL) + .poll_get_char = s3c24xx_serial_get_poll_char, + .poll_put_char = s3c24xx_serial_put_poll_char, +#endif +}; + static struct uart_driver s3c24xx_uart_drv = { .owner = THIS_MODULE, .driver_name = "s3c2410_serial", @@ -1868,10 +1898,6 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, /* setup info for port */ port->dev = &platdev->dev; - /* Startup sequence is different for s3c64xx and higher SoC's */ - if (s3c24xx_serial_has_interrupt_mask(port)) - s3c24xx_serial_ops.startup = s3c64xx_serial_startup; - port->uartclk = 1; if (cfg->uart_flags & UPF_CONS_FLOW) { @@ -2019,6 +2045,17 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) dev_get_platdata(&pdev->dev) : ourport->drv_data->def_cfg; + switch (ourport->info->type) { + case PORT_S3C2410: + case PORT_S3C2412: + case PORT_S3C2440: + ourport->port.ops = &s3c24xx_serial_ops; + break; + case PORT_S3C6400: + ourport->port.ops = &s3c64xx_serial_ops; + break; + } + if (np) { of_property_read_u32(np, "samsung,uart-fifosize", &ourport->port.fifosize);