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154 lines
4.9 KiB
154 lines
4.9 KiB
From 7e5f528cb1448ac31a4e3a45c7c953ea95869d4d 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 13:08:03 +0100
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Subject: [PATCH] gta0x-add-minimal-GSM-flowcontrol.patch
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Add the basic GSM flowcontrol code.
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Signed-off-by: Mike Westerhof <mwester@dls.net>
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---
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arch/arm/mach-s3c2410/mach-gta01.c | 3 ++
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arch/arm/mach-s3c2440/mach-gta02.c | 3 ++
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arch/arm/plat-s3c24xx/neo1973_pm_gsm.c | 36 ++++++++++++++++++++++++++++++++
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3 files changed, 42 insertions(+), 0 deletions(-)
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diff --git a/arch/arm/mach-s3c2410/mach-gta01.c b/arch/arm/mach-s3c2410/mach-gta01.c
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index e518de7..f3f87cf 100644
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--- a/arch/arm/mach-s3c2410/mach-gta01.c
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+++ b/arch/arm/mach-s3c2410/mach-gta01.c
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@@ -657,9 +657,12 @@ static void __init gta01_map_io(void)
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s3c24xx_init_uarts(gta01_uartcfgs, ARRAY_SIZE(gta01_uartcfgs));
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}
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+extern int gta_gsm_interrupts;
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+
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static irqreturn_t gta01_modem_irq(int irq, void *param)
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{
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printk(KERN_DEBUG "GSM wakeup interrupt (IRQ %d)\n", irq);
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+ gta_gsm_interrupts++;
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return IRQ_HANDLED;
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}
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index 8e43c4a..1d7d262 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -1531,9 +1531,12 @@ static void __init gta02_map_io(void)
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s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
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}
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+extern int gta_gsm_interrupts;
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+
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static irqreturn_t gta02_modem_irq(int irq, void *param)
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{
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printk(KERN_DEBUG "modem wakeup interrupt\n");
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+ gta_gsm_interrupts++;
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return IRQ_HANDLED;
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}
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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 dd63506..0543905 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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@@ -34,6 +34,9 @@
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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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+int gta_gsm_interrupts;
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+EXPORT_SYMBOL(gta_gsm_interrupts);
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+
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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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@@ -80,6 +83,9 @@ static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
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if (!s3c2410_gpio_getpin(GTA02_GPIO_nDL_GSM))
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goto out_1;
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}
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+ } else if (!strcmp(attr->attr.name, "flowcontrolled")) {
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+ if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT)
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+ goto out_1;
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}
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return strlcpy(buf, "0\n", 3);
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@@ -176,6 +182,13 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
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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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+ } else if (!strcmp(attr->attr.name, "flowcontrolled")) {
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+ if (on) {
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+ gta_gsm_interrupts = 0;
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+ s3c2410_gpio_setpin(S3C2410_GPH1, 1);
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+ s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_OUTP);
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+ } else
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+ s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_nRTS0);
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}
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return count;
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@@ -184,6 +197,7 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
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static DEVICE_ATTR(power_on, 0644, gsm_read, gsm_write);
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static DEVICE_ATTR(reset, 0644, gsm_read, gsm_write);
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static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
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+static DEVICE_ATTR(flowcontrolled, 0644, gsm_read, gsm_write);
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#ifdef CONFIG_PM
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static int gta01_gsm_resume(struct platform_device *pdev);
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@@ -192,6 +206,11 @@ static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
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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 much here. */
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+ /* If flowcontrol asserted, abort if GSM already interrupted */
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+ if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT) {
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+ if (gta_gsm_interrupts)
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+ goto busy;
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+ }
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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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@@ -204,6 +223,20 @@ static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
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s3c24xx_serial_register_resume_dependency(&resume_dep_gsm_uart, 0);
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return 0;
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+
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+busy:
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+ return -EBUSY;
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+}
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+
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+static int
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+gta01_gsm_suspend_late(struct platform_device *pdev, pm_message_t state)
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+{
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+ /* Last chance: abort if GSM already interrupted */
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+ if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT) {
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+ if (gta_gsm_interrupts)
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+ return -EBUSY;
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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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@@ -228,6 +261,7 @@ static int gta01_gsm_resume(struct platform_device *pdev)
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}
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#else
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#define gta01_gsm_suspend NULL
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+#define gta01_gsm_suspend_late NULL
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#define gta01_gsm_resume NULL
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#endif
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@@ -235,6 +269,7 @@ static struct attribute *gta01_gsm_sysfs_entries[] = {
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&dev_attr_power_on.attr,
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&dev_attr_reset.attr,
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&dev_attr_download.attr,
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+ &dev_attr_flowcontrolled.attr,
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NULL
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};
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@@ -314,6 +349,7 @@ static struct platform_driver gta01_gsm_driver = {
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.probe = gta01_gsm_probe,
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.remove = gta01_gsm_remove,
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.suspend = gta01_gsm_suspend,
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+ .suspend_late = gta01_gsm_suspend_late,
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.resume = gta01_gsm_resume,
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.driver = {
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.name = "neo1973-pm-gsm",
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--
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1.5.6.5
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