77 lines
2.7 KiB
Diff
77 lines
2.7 KiB
Diff
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From bea12b6beb76a483145b07d30602b0dd18ff2484 Mon Sep 17 00:00:00 2001
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From: Mike Westerhof <mwester@dls.net>
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Date: Fri, 8 Aug 2008 13:10:18 +0100
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Subject: [PATCH] silence-serial-console-gta01.patch
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This patch ensures that no console data will go the UART while
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the GSM mux is switched to the GSM. This is necessary despite
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the code that disables the console due to the fact that the
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console resumes before the neo1973_pm_gsm driver, and consoles
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always resume in the "on" state.
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Signed-off-by: Mike Westerhof <mwester@dls.net>
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---
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arch/arm/plat-s3c24xx/neo1973_pm_gsm.c | 3 +++
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drivers/serial/s3c2410.c | 10 ++++++++++
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2 files changed, 13 insertions(+), 0 deletions(-)
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diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
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index 0543905..68b7111 100644
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--- a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
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+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
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@@ -31,6 +31,7 @@
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#include <asm/arch/regs-gpioj.h>
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#endif
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+extern void s3c24xx_serial_console_set_silence(int silence);
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extern void s3c24xx_serial_register_resume_dependency(struct resume_dependency *
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resume_dependency, int uart_index);
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@@ -105,6 +106,7 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
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"disconnecting serial console\n");
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console_stop(gta01_gsm.con);
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+ s3c24xx_serial_console_set_silence(1);
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}
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if (gta01_gsm.gpio_ngsm_en)
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@@ -144,6 +146,7 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
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s3c2410_gpio_setpin(gta01_gsm.gpio_ngsm_en, 1);
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if (gta01_gsm.con) {
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+ s3c24xx_serial_console_set_silence(0);
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console_start(gta01_gsm.con);
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dev_dbg(dev, "powered down GSM, thus enabling "
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diff --git a/drivers/serial/s3c2410.c b/drivers/serial/s3c2410.c
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index 5652905..2a388cf 100644
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--- a/drivers/serial/s3c2410.c
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+++ b/drivers/serial/s3c2410.c
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@@ -1780,6 +1780,13 @@ module_exit(s3c24xx_serial_modexit);
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#ifdef CONFIG_SERIAL_S3C2410_CONSOLE
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static struct uart_port *cons_uart;
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+static int cons_silenced;
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+
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+void s3c24xx_serial_console_set_silence(int silenced)
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+{
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+ cons_silenced = silenced;
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+}
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+EXPORT_SYMBOL(s3c24xx_serial_console_set_silence);
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static int
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s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon)
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@@ -1806,6 +1813,9 @@ s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
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unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
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unsigned int umcon = rd_regl(cons_uart, S3C2410_UMCON);
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+ if (cons_silenced)
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+ return;
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+
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/* If auto HW flow control enabled, temporarily turn it off */
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if (umcon & S3C2410_UMCOM_AFC)
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wr_regl(port, S3C2410_UMCON, (umcon & !S3C2410_UMCOM_AFC));
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--
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1.5.6.5
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