--- /dev/null
+/*
+ * 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");
projects / openwrt / svn-archive / archive.git / blobdiff