+++ /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 <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);
-
-extern void s3c24xx_serial_console_set_silence(int);
-
-struct gta02pm_priv {
- int gpio_ndl_gsm;
- struct console *con;
-};
-
-static struct gta02pm_priv gta02_gsm;
-
-static struct console *find_s3c24xx_console(void)
-{
- struct console *con;
-
- acquire_console_sem();
-
- for (con = console_drivers; con; con = con->next) {
- if (!strcmp(con->name, "ttySAC"))
- break;
- }
-
- release_console_sem();
-
- return con;
-}
-
-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) {
- s3c2410_gpio_cfgpin(S3C2410_GPH1, S3C2410_GPIO_INPUT);
- s3c2410_gpio_cfgpin(S3C2410_GPH2, S3C2410_GPIO_INPUT);
-
- pcf50633_gpio_set(gta02_pcf, PCF50633_GPIO2, 0);
-
- if (gta02_gsm.con) {
- s3c24xx_serial_console_set_silence(0);
- console_start(gta02_gsm.con);
-
- dev_dbg(dev, "powered down gta02 GSM, enabling "
- "serial console\n");
- }
-
- return;
- }
-
- if (gta02_gsm.con) {
- dev_dbg(dev, "powering up GSM, thus "
- "disconnecting serial console\n");
-
- console_stop(gta02_gsm.con);
- s3c24xx_serial_console_set_silence(1);
- }
-
- /* 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);
-
- s3c2410_gpio_setpin(GTA02_GPIO_MODEM_ON, 1);
- msleep(500);
- s3c2410_gpio_setpin(GTA02_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);
-
-}
-
-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. */
-
- /* Make sure that the kernel console on the serial port is still
- * disabled. FIXME: resume ordering race with serial driver! */
- if (gta02_gsm.con && s3c2410_gpio_getpin(GTA02_GPIO_MODEM_ON))
- console_stop(gta02_gsm.con);
-
- 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:
- dev_warn(&pdev->dev, "Unknown Freerunner Revision 0x%x, "
- "some PM features not available!!!\n",
- system_rev);
- break;
- }
-
- gta02_gsm.con = find_s3c24xx_console();
- if (!gta02_gsm.con)
- dev_warn(&pdev->dev,
- "cannot find S3C24xx console driver\n");
-
- /* 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 / openwrt.git / blobdiff