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authorLars-Peter Clausen <lars@metafoo.de>2009-06-28 20:25:00 +0000
committerLars-Peter Clausen <lars@metafoo.de>2009-06-28 20:25:00 +0000
commitb4066ae91a2443ba1b8174ebd7abede8f2a47062 (patch)
tree949cbea086e49fab510786704c034171b46b1b37 /target/linux/s3c24xx/files-2.6.30
parent8179904540542eae92e18253d8fa0b9113e16ee0 (diff)
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mtk-20170518-b4066ae91a2443ba1b8174ebd7abede8f2a47062.tar.gz
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Fix freerunner gsm modem pm.
SVN-Revision: 16609
Diffstat (limited to 'target/linux/s3c24xx/files-2.6.30')
-rw-r--r--target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-gsm.c59
1 files changed, 51 insertions, 8 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-gsm.c b/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-gsm.c
index 2f1da04..afb4182 100644
--- a/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-gsm.c
+++ b/target/linux/s3c24xx/files-2.6.30/arch/arm/mach-s3c2442/gta02-pm-gsm.c
@@ -19,7 +19,6 @@
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/gta02-shadow.h>
#include <mach/gpio.h>
#include <asm/mach-types.h>
@@ -31,16 +30,36 @@
#include <linux/mfd/pcf50633/gpio.h>
#include <mach/regs-gpio.h>
#include <mach/regs-gpioj.h>
+#include <linux/gta02-shadow.h>
int gta_gsm_interrupts;
EXPORT_SYMBOL(gta_gsm_interrupts);
+extern void s3c24xx_serial_console_set_silence(int);
+
struct gta02pm_priv {
int gpio_ndl_gsm;
+ struct console *con;
};
static struct gta02pm_priv gta02_gsm;
+static struct console *find_s3c24xx_console(void)
+{
+ struct console *con;
+
+ acquire_console_sem();
+
+ for (con = console_drivers; con; con = con->next) {
+ if (!strcmp(con->name, "ttySAC"))
+ break;
+ }
+
+ release_console_sem();
+
+ return con;
+}
+
static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
char *buf)
{
@@ -63,19 +82,30 @@ out_1:
static void gsm_on_off(struct device *dev, int on)
{
if (!on) {
- /*
- * Do not drive into powered-down GSM side
- * GTA02 only, because on GTA01 maybe serial
- * is used otherwise.
- */
s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPIO_INPUT);
s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPIO_INPUT);
pcf50633_gpio_set(gta02_pcf, PCF50633_GPIO2, 0);
+ if (gta02_gsm.con) {
+ s3c24xx_serial_console_set_silence(0);
+ console_start(gta02_gsm.con);
+
+ dev_dbg(dev, "powered down gta02 GSM, enabling "
+ "serial console\n");
+ }
+
return;
}
+ if (gta02_gsm.con) {
+ dev_dbg(dev, "powering up GSM, thus "
+ "disconnecting serial console\n");
+
+ console_stop(gta02_gsm.con);
+ s3c24xx_serial_console_set_silence(1);
+ }
+
/* allow UART to talk to GSM side now we will power it */
s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_nRTS0);
s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPH2_TXD0);
@@ -84,6 +114,10 @@ static void gsm_on_off(struct device *dev, int on)
msleep(100);
+ gta02_gpb_setpin(GTA02_GPIO_MODEM_ON, 1);
+ msleep(500);
+ gta02_gpb_setpin(GTA02_GPIO_MODEM_ON, 0);
+
/*
* workaround for calypso firmware moko10 and earlier,
* without this it will leave IRQ line high after
@@ -188,6 +222,11 @@ static int gta02_gsm_resume(struct platform_device *pdev)
/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
* don't need to do much here. */
+ /* Make sure that the kernel console on the serial port is still
+ * disabled. FIXME: resume ordering race with serial driver! */
+ if (gta02_gsm.con && s3c2410_gpio_getpin(GTA02_GPIO_MODEM_ON))
+ console_stop(gta02_gsm.con);
+
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, gta02_gsm.gpio_ndl_gsm);
return 0;
@@ -222,13 +261,17 @@ static int __init gta02_gsm_probe(struct platform_device *pdev)
case GTA02v6_SYSTEM_REV:
break;
default:
- /* TODO: fail */
- dev_warn(&pdev->dev, "Unknown Neo1973 Revision 0x%x, "
+ dev_warn(&pdev->dev, "Unknown Freerunner Revision 0x%x, "
"some PM features not available!!!\n",
system_rev);
break;
}
+ gta02_gsm.con = find_s3c24xx_console();
+ if (!gta02_gsm.con)
+ dev_warn(&pdev->dev,
+ "cannot find S3C24xx console driver\n");
+
/* note that download initially disabled, and enforce that */
gta02_gsm.gpio_ndl_gsm = 1;
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);