mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-01 23:37:29 +02:00
fb189822fc
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15918 3c298f89-4303-0410-b956-a3cf2f4a3e73
276 lines
6.8 KiB
C
276 lines
6.8 KiB
C
/*
|
|
* GSM Management code for the Openmoko Freerunner GSM Phone
|
|
*
|
|
* (C) 2007 by Openmoko Inc.
|
|
* Author: Harald Welte <laforge@openmoko.org>
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/console.h>
|
|
#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>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <mach/cpu.h>
|
|
|
|
#include <mach/gta02.h>
|
|
#include <linux/mfd/pcf50633/gpio.h>
|
|
#include <mach/regs-gpio.h>
|
|
#include <mach/regs-gpioj.h>
|
|
|
|
int gta_gsm_interrupts;
|
|
EXPORT_SYMBOL(gta_gsm_interrupts);
|
|
|
|
struct gta02pm_priv {
|
|
int gpio_ndl_gsm;
|
|
};
|
|
|
|
static struct gta02pm_priv gta02_gsm;
|
|
|
|
static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
if (!strcmp(attr->attr.name, "power_on")) {
|
|
if (pcf50633_gpio_get(gta02_pcf, PCF50633_GPIO2))
|
|
goto out_1;
|
|
} else if (!strcmp(attr->attr.name, "download")) {
|
|
if (!s3c2410_gpio_getpin(GTA02_GPIO_nDL_GSM))
|
|
goto out_1;
|
|
} else if (!strcmp(attr->attr.name, "flowcontrolled")) {
|
|
if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT)
|
|
goto out_1;
|
|
}
|
|
|
|
return strlcpy(buf, "0\n", 3);
|
|
out_1:
|
|
return strlcpy(buf, "1\n", 3);
|
|
}
|
|
|
|
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);
|
|
|
|
return;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
pcf50633_gpio_set(gta02_pcf, PCF50633_GPIO2, 7);
|
|
|
|
msleep(100);
|
|
|
|
/*
|
|
* 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);
|
|
|
|
}
|
|
|
|
static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
unsigned long on = simple_strtoul(buf, NULL, 10);
|
|
|
|
if (!strcmp(attr->attr.name, "power_on")) {
|
|
gsm_on_off(dev, on);
|
|
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(attr->attr.name, "download")) {
|
|
/*
|
|
* the keyboard / buttons driver requests and enables
|
|
* the JACK_INSERT IRQ. We have to take care about
|
|
* not enabling and disabling the IRQ when it was
|
|
* already in that state or we get "unblanaced IRQ"
|
|
* kernel warnings and stack dumps. So we use the
|
|
* copy of the ndl_gsm state to figure out if we should
|
|
* enable or disable the jack interrupt
|
|
*/
|
|
if (on) {
|
|
if (gta02_gsm.gpio_ndl_gsm)
|
|
disable_irq(gpio_to_irq(
|
|
GTA02_GPIO_JACK_INSERT));
|
|
} else {
|
|
if (!gta02_gsm.gpio_ndl_gsm)
|
|
enable_irq(gpio_to_irq(
|
|
GTA02_GPIO_JACK_INSERT));
|
|
}
|
|
|
|
gta02_gsm.gpio_ndl_gsm = !on;
|
|
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, !on);
|
|
|
|
return count;
|
|
}
|
|
|
|
if (!strcmp(attr->attr.name, "flowcontrolled")) {
|
|
if (on) {
|
|
gta_gsm_interrupts = 0;
|
|
s3c2410_gpio_setpin(S3C2410_GPH1, 1);
|
|
s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_OUTP);
|
|
} else
|
|
s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPH1_nRTS0);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(power_on, 0644, gsm_read, gsm_write);
|
|
static DEVICE_ATTR(reset, 0644, gsm_read, gsm_write);
|
|
static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
|
|
static DEVICE_ATTR(flowcontrolled, 0644, gsm_read, gsm_write);
|
|
|
|
#ifdef CONFIG_PM
|
|
|
|
static int gta02_gsm_resume(struct platform_device *pdev);
|
|
static int gta02_gsm_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
|
|
* don't need to do much here. */
|
|
|
|
/* If flowcontrol asserted, abort if GSM already interrupted */
|
|
if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT) {
|
|
if (gta_gsm_interrupts)
|
|
goto busy;
|
|
}
|
|
|
|
/* disable DL GSM to prevent jack_insert becoming 'floating' */
|
|
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);
|
|
return 0;
|
|
|
|
busy:
|
|
return -EBUSY;
|
|
}
|
|
|
|
static int
|
|
gta02_gsm_suspend_late(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
/* Last chance: abort if GSM already interrupted */
|
|
if (s3c2410_gpio_getcfg(S3C2410_GPH1) == S3C2410_GPIO_OUTPUT) {
|
|
if (gta_gsm_interrupts)
|
|
return -EBUSY;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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. */
|
|
|
|
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, gta02_gsm.gpio_ndl_gsm);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define gta02_gsm_suspend NULL
|
|
#define gta02_gsm_suspend_late NULL
|
|
#define gta02_gsm_resume NULL
|
|
#endif /* CONFIG_PM */
|
|
|
|
static struct attribute *gta02_gsm_sysfs_entries[] = {
|
|
&dev_attr_power_on.attr,
|
|
&dev_attr_reset.attr,
|
|
&dev_attr_download.attr,
|
|
&dev_attr_flowcontrolled.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group gta02_gsm_attr_group = {
|
|
.name = NULL,
|
|
.attrs = gta02_gsm_sysfs_entries,
|
|
};
|
|
|
|
static int __init gta02_gsm_probe(struct platform_device *pdev)
|
|
{
|
|
switch (S3C_SYSTEM_REV_ATAG) {
|
|
case GTA02v1_SYSTEM_REV:
|
|
case GTA02v2_SYSTEM_REV:
|
|
case GTA02v3_SYSTEM_REV:
|
|
case GTA02v4_SYSTEM_REV:
|
|
case GTA02v5_SYSTEM_REV:
|
|
case GTA02v6_SYSTEM_REV:
|
|
break;
|
|
default:
|
|
/* TODO: fail */
|
|
dev_warn(&pdev->dev, "Unknown Neo1973 Revision 0x%x, "
|
|
"some PM features not available!!!\n",
|
|
system_rev);
|
|
break;
|
|
}
|
|
|
|
/* note that download initially disabled, and enforce that */
|
|
gta02_gsm.gpio_ndl_gsm = 1;
|
|
s3c2410_gpio_setpin(GTA02_GPIO_nDL_GSM, 1);
|
|
|
|
/* GSM is to be initially off (at boot, or if this module inserted) */
|
|
gsm_on_off(&pdev->dev, 0);
|
|
|
|
return sysfs_create_group(&pdev->dev.kobj, >a02_gsm_attr_group);
|
|
}
|
|
|
|
static int gta02_gsm_remove(struct platform_device *pdev)
|
|
{
|
|
sysfs_remove_group(&pdev->dev.kobj, >a02_gsm_attr_group);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver gta02_gsm_driver = {
|
|
.probe = gta02_gsm_probe,
|
|
.remove = gta02_gsm_remove,
|
|
.suspend = gta02_gsm_suspend,
|
|
.suspend_late = gta02_gsm_suspend_late,
|
|
.resume = gta02_gsm_resume,
|
|
.driver = {
|
|
.name = "gta02-pm-gsm",
|
|
},
|
|
};
|
|
|
|
static int __devinit gta02_gsm_init(void)
|
|
{
|
|
return platform_driver_register(>a02_gsm_driver);
|
|
}
|
|
|
|
static void gta02_gsm_exit(void)
|
|
{
|
|
platform_driver_unregister(>a02_gsm_driver);
|
|
}
|
|
|
|
module_init(gta02_gsm_init);
|
|
module_exit(gta02_gsm_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
|
|
MODULE_DESCRIPTION("Openmoko Freerunner GSM Power Management");
|