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122 lines
3.9 KiB
Diff
122 lines
3.9 KiB
Diff
From 081f2aa16800b186e0cfde52f41afa805a3d53c2 Mon Sep 17 00:00:00 2001
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From: Holger Freyther <zecke@openmoko.org>
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Date: Fri, 25 Jul 2008 23:06:04 +0100
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Subject: [PATCH] Fix the firing of "Jack"-Interrupts after resume when the modem is powered on.
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GTA02_GPIO_nDL_GSM defaults to high/1. On resume do not enable the DL_GSM if
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it was not enabled before. This is stopping the storm of interrupts.
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Fix the logic in the download file handling. Downloads are disabled (0) when
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the GTA02_GPIO_nDL_GSM is high (1). To enable downloading set
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GTA02_GPIO_nDL_GSM to low (0, !on). Disable the jack interrupt while download
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the is active. When disabling download we will get a couple of jack interrupts
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but this is hardly avoidable.
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Avoid reading the GPIO value if we do not even have a console set.
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Signed-Off-by: Holger Freyther <zecke@openmoko.org>
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---
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arch/arm/plat-s3c24xx/neo1973_pm_gsm.c | 35 +++++++++++++++++++++++--------
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1 files changed, 26 insertions(+), 9 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 1123d7d..b4ea8ba 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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@@ -17,8 +17,9 @@
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#include <linux/platform_device.h>
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#include <linux/console.h>
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#include <linux/errno.h>
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+#include <linux/interrupt.h>
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-#include <asm/hardware.h>
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+#include <asm/gpio.h>
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#include <asm/mach-types.h>
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#include <asm/arch/gta01.h>
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@@ -30,6 +31,7 @@
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struct gta01pm_priv {
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int gpio_ngsm_en;
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+ int gpio_ndl_gsm;
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struct console *con;
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};
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@@ -68,7 +70,7 @@ static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
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#endif
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#ifdef CONFIG_MACH_NEO1973_GTA02
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if (machine_is_neo1973_gta02())
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- if (s3c2410_gpio_getpin(GTA02_GPIO_nDL_GSM))
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+ if (!s3c2410_gpio_getpin(GTA02_GPIO_nDL_GSM))
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goto out_1;
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#endif
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}
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@@ -143,8 +145,18 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
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s3c2410_gpio_setpin(GTA01_GPIO_MODEM_DNLOAD, on);
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#endif
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#ifdef CONFIG_MACH_NEO1973_GTA02
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- if (machine_is_neo1973_gta02())
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- s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, on);
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+ if (machine_is_neo1973_gta02()) {
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+ /* FIXME: Layering violation, we know how this relates to
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+ * the Jack-IRQ. And we assume the keyboard driver to be
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+ * around. */
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+ if (on)
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+ disable_irq(gpio_to_irq(GTA02_GPIO_JACK_INSERT));
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+ else
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+ enable_irq(gpio_to_irq(GTA02_GPIO_JACK_INSERT));
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+
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+ gta01_gsm.gpio_ndl_gsm = !on;
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+ s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, !on);
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+ }
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#endif
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}
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@@ -159,26 +171,29 @@ static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
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static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
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{
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/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
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- * don't need to do anything here */
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+ * don't need to do much here. */
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+
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- /* disable DL GSM to prevent jack_insert becoming floating */
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+ /* disable DL GSM to prevent jack_insert becoming 'floating' */
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if (machine_is_neo1973_gta02())
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s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);
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+
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return 0;
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}
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static int gta01_gsm_resume(struct platform_device *pdev)
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{
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/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
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- * don't need to do anything here */
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+ * don't need to do much here. */
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/* Make sure that the kernel console on the serial port is still
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* disabled. FIXME: resume ordering race with serial driver! */
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- if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON) && gta01_gsm.con)
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+ if (gta01_gsm.con && s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON))
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console_stop(gta01_gsm.con);
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if (machine_is_neo1973_gta02())
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- s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 0);
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+ s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, gta01_gsm.gpio_ndl_gsm);
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+
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return 0;
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}
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#else
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@@ -248,6 +263,8 @@ static int __init gta01_gsm_probe(struct platform_device *pdev)
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} else
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gta01_gsm.con = NULL;
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+ gta01_gsm.gpio_ndl_gsm = 1;
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+
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return sysfs_create_group(&pdev->dev.kobj, >a01_gsm_attr_group);
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}
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--
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1.5.6.3
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