193 lines
4.4 KiB
C
Executable File
193 lines
4.4 KiB
C
Executable File
/*
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* Buttons support for Toshiba G900. GPIO buttons
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* based on:
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* Xiao Huang g900_button.c
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*/
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/platform_device.h>
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#include <linux/gpio_keys.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/pxa2xx-regs.h>
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#include <mach/g900-gpio.h>
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#include <mach/gpio.h>
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#ifdef CONFIG_SWITCH_GPIO
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#include <linux/switch.h>
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#include "../generic.h"
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/*
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static struct gpio_switch_platform_data headset_switch_data = {
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.name = "h2w",
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.gpio = GPIO51_BTN_nJackInsert,
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};
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static struct platform_device headset_switch_device = {
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.name = "switch-gpio",
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.dev = {
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.platform_data = &headset_switch_data,
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}
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};
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*/
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static struct gpio_switch_platform_data kbr_switch_data = {
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.name = "kbr",
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.gpio = GPIO9_BTN_nKBOpen,
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};
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static struct platform_device kbr_switch_device = {
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.name = "switch-gpio",
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.dev = {
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.platform_data = &kbr_switch_data,
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}
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};
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static struct platform_device *switch_device[] __initdata = {
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//&headset_switch_device,
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&kbr_switch_device,
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};
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#endif
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static struct gpio_keys_button gpio_buttons[] = {
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{KEY_POWER, GPIO3_BTN_nPower, 0, "Power button"},
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#ifndef CONFIG_SWITCH_GPIO
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{99 , GPIO9_BTN_nKBOpen, 0, "Keyboard open"},
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{SW_HEADPHONE_INSERT, GPIO51_BTN_nJackInsert, 0, "HeadPhone insert"},
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#endif
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{KEY_PLAY, GPIO10_BTN_nHeadSet, 0, "HeadSet button"},
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};
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static struct input_dev *input_dev = NULL;
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static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
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{
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int i, state;
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int gpiovalue;
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for (i = 0; i < ARRAY_SIZE(gpio_buttons); i++)
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{
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if (IRQ_GPIO(gpio_buttons[i].gpio) == irq)
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{
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gpiovalue = GET_GPIO(gpio_buttons[i].gpio);
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//printk("gpio=%d, active_low=%d\n", gpiovalue, gpio_buttons[i].active_low );
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state = (gpiovalue ? 1 : 0) ^ (gpio_buttons[i].active_low);
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/*state = (gpio_buttons[i].active_low ? !state : state);*/
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input_report_key(input_dev, gpio_buttons[i].code, state);
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input_sync(input_dev);
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//printk("code=%d, state=%d\n", gpio_buttons[i].code, state);
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}
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}
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return IRQ_HANDLED;
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}
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static int buttons_probe(struct platform_device *pdev)
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{
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int i, err;
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int irqflag = IRQF_SAMPLE_RANDOM;
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#ifdef CONFIG_PREEMPT_RT
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irqflag |= IRQF_NODELAY;
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#endif
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if (!machine_is_g900())
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return -ENODEV;
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#ifdef CONFIG_SWITCH_GPIO
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err=platform_add_devices(ARRAY_AND_SIZE(switch_device));
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#endif
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if (!(input_dev = input_allocate_device())) return -ENOMEM;
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input_dev->name = "g900_buttons";
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set_bit(EV_KEY, input_dev->evbit);
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for (i = 0; i < ARRAY_SIZE(gpio_buttons); i++)
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{
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set_bit(gpio_buttons[i].code, input_dev->keybit);
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}
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err=input_register_device(input_dev);
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if (err) {
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printk(KERN_ERR "Could not input_register_device \n");
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return err;
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}
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for (i = 0; i < ARRAY_SIZE(gpio_buttons); i++)
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{
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//assign irq and keybit
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set_irq_type(IRQ_GPIO(gpio_buttons[i].gpio), IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING);
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err = request_irq(IRQ_GPIO(gpio_buttons[i].gpio), gpio_irq_handler, irqflag, "g900-gpio-buttons", NULL);
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if (err)
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{
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printk(KERN_ERR "%s: Cannot assign GPIO(%d) IRQ\n", __FUNCTION__, gpio_buttons[i].gpio);
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return err;
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}
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//printk("*****IRQ %d OK****", IRQ_GPIO(gpio_buttons[i].gpio));
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}
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return 0;
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}
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static int buttons_remove(struct platform_device *pdev)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(gpio_buttons); i++)
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{
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free_irq(IRQ_GPIO(gpio_buttons[i].gpio), NULL);
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}
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input_unregister_device(input_dev);
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input_free_device(input_dev);
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return 0;
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}
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static int buttons_suspend(struct platform_device *pdev, pm_message_t state)
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{
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return 0;
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}
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static int buttons_resume(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver buttons_driver = {
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.driver = {
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.name = "g900-button",
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},
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.probe = buttons_probe,
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.remove = buttons_remove,
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#ifdef CONFIG_PM
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.suspend = buttons_suspend,
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.resume = buttons_resume,
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#endif
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};
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static int __init buttons_init(void)
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{
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return platform_driver_register(&buttons_driver);
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}
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static void __exit buttons_exit(void)
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{
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platform_driver_unregister(&buttons_driver);
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}
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module_init(buttons_init);
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module_exit(buttons_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("El Tuba<tuba.linux@gmail.com>");
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MODULE_DESCRIPTION("Buttons driver for Toshiba G900");
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