From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759291Ab0JVTat (ORCPT ); Fri, 22 Oct 2010 15:30:49 -0400 Received: from kroah.org ([198.145.64.141]:41843 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758337Ab0JVSVc (ORCPT ); Fri, 22 Oct 2010 14:21:32 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Michal Simek , Jason Wessel , Greg Kroah-Hartman Subject: [PATCH 04/49] serial: Add CONSOLE_POLL support for uartlite Date: Fri, 22 Oct 2010 11:20:43 -0700 Message-Id: <1287771688-14805-4-git-send-email-gregkh@suse.de> X-Mailer: git-send-email 1.7.1 In-Reply-To: <20101022175112.GC13489@kroah.com> References: <20101022175112.GC13489@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Michal Simek CONSOLE_POLL support for uartlite enables KGDB debugging over serial line. Signed-off-by: Michal Simek Signed-off-by: Jason Wessel Acked-by: Peter Korsgaard Signed-off-by: Greg Kroah-Hartman --- drivers/serial/uartlite.c | 26 +++++++++++++++++++++++++- 1 files changed, 25 insertions(+), 1 deletions(-) diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c index 9b03d7b..c4bf54b 100644 --- a/drivers/serial/uartlite.c +++ b/drivers/serial/uartlite.c @@ -322,6 +322,26 @@ static int ulite_verify_port(struct uart_port *port, struct serial_struct *ser) return -EINVAL; } +#ifdef CONFIG_CONSOLE_POLL +static int ulite_get_poll_char(struct uart_port *port) +{ + if (!(ioread32be(port->membase + ULITE_STATUS) + & ULITE_STATUS_RXVALID)) + return NO_POLL_CHAR; + + return ioread32be(port->membase + ULITE_RX); +} + +static void ulite_put_poll_char(struct uart_port *port, unsigned char ch) +{ + while (ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_TXFULL) + cpu_relax(); + + /* write char to device */ + iowrite32be(ch, port->membase + ULITE_TX); +} +#endif + static struct uart_ops ulite_ops = { .tx_empty = ulite_tx_empty, .set_mctrl = ulite_set_mctrl, @@ -338,7 +358,11 @@ static struct uart_ops ulite_ops = { .release_port = ulite_release_port, .request_port = ulite_request_port, .config_port = ulite_config_port, - .verify_port = ulite_verify_port + .verify_port = ulite_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = ulite_get_poll_char, + .poll_put_char = ulite_put_poll_char, +#endif }; /* --------------------------------------------------------------------- -- 1.7.2