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authorPaul Fertser <fercerpav@gmail.com>2009-02-22 01:16:16 +0000
committerAndy Green <agreen@octopus.localdomain>2009-02-22 01:16:16 +0000
commit699298c9ccf37cd116e485523c15c184781e5063 (patch)
tree3c111ad4ee6df55916860a74b2f9e75bdb10b7a8 /arch
parent9284591d0948c775afc97207001761eea649318c (diff)
GTA0[12]: fix calypso sysfs power_on handling
This implements a proper scheme of controlling powering on of the Calypso GSM modem which should be activated with a "push-button" connected to MODEM_ON line. Also a workaround for firmware bug of moko10 and earlier implemented to force calypso to pull IRQ line down after powering on. The "reset" sysfs node is left for compatibility with userspace (without it gsm0710muxd breaks) but it does nothing (NC on hardware level on GTA02 anyway). I tested flashing the GSM firmware (on GTA02) with this patch (using only fluid and power_on node) and can confirm that it's working as reliably as with accessing gpio directly per instructions. The credit goes to Joerg Reisenweber for discussions and clarifications on how this should be done properly. Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/plat-s3c24xx/neo1973_pm_gsm.c32
1 files changed, 18 insertions, 14 deletions
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
index 08cdf77b668..c493018b737 100644
--- a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
@@ -18,6 +18,7 @@
#include <linux/console.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
+#include <linux/delay.h>
#include <mach/gpio.h>
#include <asm/mach-types.h>
@@ -67,13 +68,12 @@ static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
char *buf)
{
if (!strcmp(attr->attr.name, "power_on")) {
- if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON))
- goto out_1;
- } else if (!strcmp(attr->attr.name, "reset")) {
- if (machine_is_neo1973_gta01() && s3c2410_gpio_getpin(GTA01_GPIO_MODEM_RST))
- goto out_1;
- else if (machine_is_neo1973_gta02() && s3c2410_gpio_getpin(GTA02_GPIO_MODEM_RST))
- goto out_1;
+ if (gta01_gsm.gpio_ngsm_en) {
+ if (!s3c2410_gpio_getpin(gta01_gsm.gpio_ngsm_en))
+ goto out_1;
+ } else if (machine_is_neo1973_gta02())
+ if (pcf50633_gpio_get(gta02_pcf, PCF50633_GPIO2))
+ goto out_1;
} else if (!strcmp(attr->attr.name, "download")) {
if (machine_is_neo1973_gta01()) {
if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_DNLOAD))
@@ -118,15 +118,24 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
case GTA02v5_SYSTEM_REV:
case GTA02v6_SYSTEM_REV:
pcf50633_gpio_set(gta02_pcf,
- PCF50633_GPIO2, 1);
+ PCF50633_GPIO2, 7);
break;
}
}
+ msleep(100);
neo1973_gpb_setpin(GTA01_GPIO_MODEM_ON, 1);
- } else {
+ msleep(500);
neo1973_gpb_setpin(GTA01_GPIO_MODEM_ON, 0);
+ /* workaround for calypso firmware moko10 and earlier,
+ without this it will leave IRQ line high after booting */
+ s3c2410_gpio_setpin(S3C2410_GPH1, 1);
+ s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_OUTP);
+ msleep(1000);
+ s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_nRTS0);
+ } else {
+ /* FIXME should all GPIOs connected to the modem be tri-stated? */
if (machine_is_neo1973_gta02()) {
switch (system_rev) {
case GTA02v2_SYSTEM_REV:
@@ -151,11 +160,6 @@ static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
"serial console\n");
}
}
- } else if (!strcmp(attr->attr.name, "reset")) {
- if (machine_is_neo1973_gta01())
- neo1973_gpb_setpin(GTA01_GPIO_MODEM_RST, on);
- else if (machine_is_neo1973_gta02())
- neo1973_gpb_setpin(GTA02_GPIO_MODEM_RST, on);
} else if (!strcmp(attr->attr.name, "download")) {
if (machine_is_neo1973_gta01())
s3c2410_gpio_setpin(GTA01_GPIO_MODEM_DNLOAD, on);