/* * Input driver for Dell Axim X5. * Creates input events for the buttons on the device * * Copyright Matthew Garrett * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive for * more details. */ #include #include #include #include #include #include #include #include #include #include #include #define MY_GET_AXIMX5_GPIO(gpio) (GPLR(gpio) & GPIO_bit(gpio)) struct input_dev button_dev; static volatile int joypad_event_count; static wait_queue_head_t joypad_event; struct kpad { int keyno; int irq; int gpio; }; enum joypad_dir { NW=0, N=1, NE=2, E=3, SE=4, S=5, SW=6, W=7, CENTER=8 }; static int joypad_state; static struct kpad gpiobuttontab[]={ {KEY_RECORD,AXIMX5_IRQ(BUTTON_RECORD),GPIO_NR_AXIMX5_BUTTON_RECORD}, {KEY_CALENDAR,AXIMX5_IRQ(BUTTON_CALENDAR),GPIO_NR_AXIMX5_BUTTON_CALENDAR}, {KEY_BOOKMARKS,AXIMX5_IRQ(BUTTON_CONTACTS),GPIO_NR_AXIMX5_BUTTON_CONTACTS}, {KEY_MAIL,AXIMX5_IRQ(BUTTON_MAILBOX),GPIO_NR_AXIMX5_BUTTON_MAILBOX}, {KEY_HOMEPAGE,AXIMX5_IRQ(BUTTON_HOME),GPIO_NR_AXIMX5_BUTTON_HOME}, {KEY_PAGEUP,AXIMX5_IRQ(SCROLL_DOWN),GPIO_NR_AXIMX5_SCROLL_DOWN}, {KEY_ENTER,AXIMX5_IRQ(SCROLL_PUSH),GPIO_NR_AXIMX5_SCROLL_PUSH}, {KEY_PAGEDOWN,AXIMX5_IRQ(SCROLL_UP),GPIO_NR_AXIMX5_SCROLL_UP}, {-1,-1,-1} }; static struct kpad gpiojoytab[]={ {KEY_ENTER,AXIMX5_IRQ(JOY_CENTER),GPIO_NR_AXIMX5_JOY_CENTER}, {KEY_LEFT,AXIMX5_IRQ(JOY_NW),GPIO_NR_AXIMX5_JOY_NW}, {KEY_UP,AXIMX5_IRQ(JOY_NE),GPIO_NR_AXIMX5_JOY_NE}, {KEY_RIGHT,AXIMX5_IRQ(JOY_SE),GPIO_NR_AXIMX5_JOY_SE}, {KEY_DOWN,AXIMX5_IRQ(JOY_SW),GPIO_NR_AXIMX5_JOY_SW}, {-1,-1,-1} }; struct jpad { int nw; int ne; int se; int sw; int left; int right; int down; int up; int pressed; }; static struct jpad joytab[]={ {0,0,0,0,0,0,0,0,0}, {0,0,0,1,1,0,1,0,0}, {0,0,1,0,0,1,1,0,0}, {0,1,0,0,0,1,0,1,0}, {1,0,0,0,1,0,0,1,0}, {0,0,1,1,0,0,1,0,0}, {0,1,0,1,1,1,1,1,0}, {1,0,0,1,1,0,0,0,0}, {0,1,1,0,0,1,0,0,0}, {1,1,0,0,0,0,0,1,0}, {1,0,1,0,1,1,1,1,0}, {0,1,1,1,1,1,1,1,0}, {1,0,1,1,1,1,1,1,0}, {1,1,0,1,1,1,1,1,0}, {1,1,1,0,1,1,1,1,0}, {1,1,1,1,1,1,1,1,0}, {-1,-1,-1,-1,-1,-1,-1,-1,-1} }; irqreturn_t aximx5_button_handle(int irq, void* dev_id, struct pt_regs *regs) { int button; /* look up the keyno */ for (button = 0; gpiobuttontab[button].irq!=-1; button++) if (gpiobuttontab[button].irq == irq) break; if (gpiobuttontab[button].irq == -1) { printk("buttons: unhandled button pressed\n"); return IRQ_HANDLED; }; if (MY_GET_AXIMX5_GPIO(gpiobuttontab[button].gpio)) { input_report_key(&button_dev, gpiobuttontab[button].keyno, 1); input_sync(&button_dev); } else { input_report_key(&button_dev, gpiobuttontab[button].keyno, 0); input_sync(&button_dev); } return IRQ_HANDLED; } irqreturn_t aximx5_joy_handle(int irq, void* dev_id, struct pt_regs *regs) { joypad_event_count++; wake_up_interruptible (&joypad_event); return IRQ_HANDLED; } void check_joypad_status(void) { int center = GET_AXIMX5_GPIO(JOY_CENTER); int nw = GET_AXIMX5_GPIO(JOY_NW); int ne = GET_AXIMX5_GPIO(JOY_NE); int se = GET_AXIMX5_GPIO(JOY_SE); int sw = GET_AXIMX5_GPIO(JOY_SW); int button; for (button=0; joytab[button].ne!=-1; button++) { if (nw!=joytab[button].nw && ne!=joytab[button].ne && se!=joytab[button].se && sw!=joytab[button].sw) break; } /* figure out what the difference between the old state and the new state */ if (joytab[button].left!=joytab[joypad_state].left) { input_report_key(&button_dev, KEY_LEFT, joytab[button].left); } if (joytab[button].right!=joytab[joypad_state].right) { input_report_key(&button_dev, KEY_RIGHT, joytab[button].right); } if (joytab[button].down!=joytab[joypad_state].down) { input_report_key(&button_dev, KEY_DOWN, joytab[button].down); } if (joytab[button].up!=joytab[joypad_state].up) { input_report_key(&button_dev, KEY_UP, joytab[button].up); } /* We want to send an enter if only the central button is pressed */ if (button==0 && joytab[button].pressed==0 && !center) { input_report_key(&button_dev, KEY_ENTER, 1); joytab[button].pressed=1; } /* We need to send a keyup for it if the central button is released or if any other button is pressed */ if (joytab[joypad_state].pressed && (button!=0 || center)) { input_report_key(&button_dev, KEY_ENTER, 0); joytab[joypad_state].pressed=0; } joypad_state=button; input_sync(&button_dev); }; static int joypad_thread(void* arg) { daemonize ("kjoypad"); set_user_nice (current, 5); for (;;) { int old_count = joypad_event_count; wait_event_interruptible(joypad_event, old_count != joypad_event_count); do { old_count = joypad_event_count; set_current_state (TASK_INTERRUPTIBLE); schedule_timeout(HZ/20); } while (old_count != joypad_event_count); check_joypad_status(); } } static int __init aximx5_button_init(void) { int button; int totalbuttons=0; for (button=0; gpiobuttontab[button].irq!=-1; button++) { request_irq(gpiobuttontab[button].irq, aximx5_button_handle, SA_SAMPLE_RANDOM, "button", NULL); set_irq_type(gpiobuttontab[button].irq, IRQT_BOTHEDGE); button_dev.evbit[totalbuttons] = BIT(EV_KEY); button_dev.keybit[LONG(gpiobuttontab[button].keyno)] = BIT(gpiobuttontab[button].keyno); totalbuttons++; } for (button=0; gpiojoytab[button].irq!=-1; button++) { request_irq(gpiojoytab[button].irq, aximx5_joy_handle, SA_SAMPLE_RANDOM, "button", NULL); set_irq_type(gpiojoytab[button].irq, IRQT_BOTHEDGE); button_dev.evbit[totalbuttons] = BIT(EV_KEY); button_dev.keybit[LONG(gpiojoytab[button].keyno)] = BIT(gpiojoytab[button].keyno); totalbuttons++; } button_dev.name = "Dell Axim button device"; input_register_device(&button_dev); init_waitqueue_head (&joypad_event); kernel_thread (joypad_thread, NULL, 0); joypad_state=0; check_joypad_status(); return 0; } module_init (aximx5_button_init); /* No module_exit function since this driver should be never unloaded */ MODULE_AUTHOR ("Matthew Garrett "); MODULE_DESCRIPTION ("Button support for Dell Axim X5"); MODULE_LICENSE ("GPL");