From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Simek Subject: [PATCH] serial: Add CONSOLE_POLL support for uartlite Date: Mon, 9 Aug 2010 12:07:32 +0200 Message-ID: <1281348452-26924-1-git-send-email-monstr@monstr.eu> Return-path: Received: from mail-bw0-f46.google.com ([209.85.214.46]:34064 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755835Ab0HIKHi (ORCPT ); Mon, 9 Aug 2010 06:07:38 -0400 Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: jacmet@sunsite.dk Cc: grant.likely@secretlab.ca, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Simek CONSOLE_POLL support for uartlite enables KGDB debugging over serial line. Signed-off-by: Michal Simek --- 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 caf085d..ce1f3e0 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) +{ + while (!(ioread32be(port->membase + ULITE_STATUS) + & ULITE_STATUS_RXVALID)) + cpu_relax(); + + 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 }; /* --------------------------------------------------------------------- -- 1.5.5.6