/* * $Id: h3600_ts_input.c,v 1.4 2002/01/23 06:39:37 jsimmons Exp $ * * Copyright (c) 2001 "Crazy" James Simmons jsimmons@transvirtual.com * * Sponsored by Transvirtual Technology. * * Derived from the code in h3600_ts.[ch] by Charles Flynn */ /* * Driver for the h3600 Touch Screen and other Atmel controlled devices. */ /* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Should you need to contact me, the author, you can do so by * e-mail - mail your message to . */ #include #include #include #include #include #include #include #include #include /* SA1100 serial defines */ #include #include /* * Definitions & global arrays. */ /* The start and end of frame characters SOF and EOF */ #define CHAR_SOF 0x02 #define CHAR_EOF 0x03 #define FRAME_OVERHEAD 3 /* CHAR_SOF,CHAR_EOF,LENGTH = 3 */ /* Atmel events and response IDs contained in frame. Programmer has no control over these numbers. TODO there are holes - specifically 1,7,0x0a */ #define VERSION_ID 0 /* Get Version (request/respose) */ #define KEYBD_ID 2 /* Keyboard (event) */ #define TOUCHS_ID 3 /* Touch Screen (event)*/ #define EEPROM_READ_ID 4 /* (request/response) */ #define EEPROM_WRITE_ID 5 /* (request/response) */ #define THERMAL_ID 6 /* (request/response) */ #define NOTIFY_LED_ID 8 /* (request/response) */ #define BATTERY_ID 9 /* (request/response) */ #define SPI_READ_ID 0x0b /* ( request/response) */ #define SPI_WRITE_ID 0x0c /* ( request/response) */ #define FLITE_ID 0x0d /* backlight ( request/response) */ #define STX_ID 0xa1 /* extension pack status (req/resp) */ #define MAX_ID 14 #define H3600_MAX_LENGTH 16 #define H3600_KEY 0xf #define H3600_SCANCODE_RECORD 1 /* 1 -> record button */ #define H3600_SCANCODE_CALENDAR 2 /* 2 -> calendar */ #define H3600_SCANCODE_CONTACTS 3 /* 3 -> contact */ #define H3600_SCANCODE_Q 4 /* 4 -> Q button */ #define H3600_SCANCODE_START 5 /* 5 -> start menu */ #define H3600_SCANCODE_UP 6 /* 6 -> up */ #define H3600_SCANCODE_RIGHT 7 /* 7 -> right */ #define H3600_SCANCODE_LEFT 8 /* 8 -> left */ #define H3600_SCANCODE_DOWN 9 /* 9 -> down */ static char *h3600_name = "H3600 TouchScreen"; /* * Per-touchscreen data. */ struct h3600_dev { struct input_dev dev; struct serio *serio; unsigned char event; /* event ID from packet */ unsigned char chksum; unsigned char len; unsigned char idx; unsigned char buf[H3600_MAX_LENGTH]; char phys[32]; }; static void action_button_handler(int irq, void *dev_id, struct pt_regs *regs) { int down = (GPLR & GPIO_BITSY_ACTION_BUTTON) ? 0 : 1; struct input_dev *dev = (struct input_dev *) dev_id; input_regs(dev, regs); input_report_key(dev, KEY_ENTER, down); input_sync(dev); } static void npower_button_handler(int irq, void *dev_id, struct pt_regs *regs) { int down = (GPLR & GPIO_BITSY_NPOWER_BUTTON) ? 0 : 1; struct input_dev *dev = (struct input_dev *) dev_id; /* * This interrupt is only called when we release the key. So we have * to fake a key press. */ input_regs(dev, regs); input_report_key(dev, KEY_SUSPEND, 1); input_report_key(dev, KEY_SUSPEND, down); input_sync(dev); } #ifdef CONFIG_PM static int flite_brightness = 25; enum flite_pwr { FLITE_PWR_OFF = 0, FLITE_PWR_ON = 1 }; /* * h3600_flite_power: enables or disables power to frontlight, using last bright */ unsigned int h3600_flite_power(struct input_dev *dev, enum flite_pwr pwr) { unsigned char brightness = ((pwr==FLITE_PWR_OFF) ? 0:flite_brightness); struct h3600_dev *ts = dev->private; /* Must be in this order */ ts->serio->write(ts->serio, 1); ts->serio->write(ts->serio, pwr); ts->serio->write(ts->serio, brightness); return 0; } static int suspended = 0; static int h3600ts_pm_callback(struct pm_dev *pm_dev, pm_request_t req, void *data) { struct input_dev *dev = (struct input_dev *) data; switch (req) { case PM_SUSPEND: /* enter D1-D3 */ suspended = 1; h3600_flite_power(dev, FLITE_PWR_OFF); break; case PM_BLANK: if (!suspended) h3600_flite_power(dev, FLITE_PWR_OFF); break; case PM_RESUME: /* enter D0 */ /* same as unblank */ case PM_UNBLANK: if (suspended) { //initSerial(); suspended = 0; } h3600_flite_power(dev, FLITE_PWR_ON); break; } return 0; } #endif /* * This function translates the native event packets to linux input event * packets. Some packets coming from serial are not touchscreen related. In * this case we send them off to be processed elsewhere. */ static void h3600ts_process_packet(struct h3600_dev *ts, struct pt_regs *regs) { struct input_dev *dev = &ts->dev; static int touched = 0; int key, down = 0; input_regs(dev, regs); switch (ts->event) { /* Buttons - returned as a single byte 7 6 5 4 3 2 1 0 S x x x N N N N S switch state ( 0=pressed 1=released) x Unused. NNNN switch number 0-15 Note: This is true for non interrupt generated key events. */ case KEYBD_ID: down = (ts->buf[0] & 0x80) ? 0 : 1; switch (ts->buf[0] & 0x7f) { case H3600_SCANCODE_RECORD: key = KEY_RECORD; break; case H3600_SCANCODE_CALENDAR: key = KEY_PROG1; break; case H3600_SCANCODE_CONTACTS: key = KEY_PROG2; break; case H3600_SCANCODE_Q: key = KEY_Q; break; case H3600_SCANCODE_START: key = KEY_PROG3; break; case H3600_SCANCODE_UP: key = KEY_UP; break; case H3600_SCANCODE_RIGHT: key = KEY_RIGHT; break; case H3600_SCANCODE_LEFT: key = KEY_LEFT; break; case H3600_SCANCODE_DOWN: key = KEY_DOWN; break; default: key = 0; } if (key) input_report_key(dev, key, down); break; /* * Native touchscreen event data is formatted as shown below:- * * +-------+-------+-------+-------+ * | Xmsb | Xlsb | Ymsb | Ylsb | * +-------+-------+-------+-------+ * byte 0 1 2 3 */ case TOUCHS_ID: if (!touched) { input_report_key(dev, BTN_TOUCH, 1); touched = 1; } if (ts->len) { unsigned short x, y; x = ts->buf[0]; x <<= 8; x += ts->buf[1]; y = ts->buf[2]; y <<= 8; y += ts->buf[3]; input_report_abs(dev, ABS_X, x); input_report_abs(dev, ABS_Y, y); } else { input_report_key(dev, BTN_TOUCH, 0); touched = 0; } break; default: /* Send a non input event elsewhere */ break; } input_sync(dev); } /* * h3600ts_event() handles events from the input module. */ static int h3600ts_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { struct h3600_dev *ts = dev->private; switch (type) { case EV_LED: { // ts->serio->write(ts->serio, SOME_CMD); return 0; } } return -1; } /* Frame format byte 1 2 3 len + 4 +-------+---------------+---------------+--=------------+ |SOF |id |len | len bytes | Chksum | +-------+---------------+---------------+--=------------+ bit 0 7 8 11 12 15 16 +-------+---------------+-------+ |SOF |id |0 |Chksum | - Note Chksum does not include SOF +-------+---------------+-------+ bit 0 7 8 11 12 15 16 */ static int state; /* decode States */ #define STATE_SOF 0 /* start of FRAME */ #define STATE_ID 1 /* state where we decode the ID & len */ #define STATE_DATA 2 /* state where we decode data */ #define STATE_EOF 3 /* state where we decode checksum or EOF */ static void h3600ts_interrupt(struct serio *serio, unsigned char data, unsigned int flags) { struct h3600_dev *ts = serio->private; /* * We have a new frame coming in. */ switch (state) { case STATE_SOF: if (data == CHAR_SOF) state = STATE_ID; return; case STATE_ID: ts->event = (data & 0xf0) >> 4; ts->len = (data & 0xf); ts->idx = 0; if (ts->event >= MAX_ID) { state = STATE_SOF; break; } ts->chksum = data; state=(ts->len > 0 ) ? STATE_DATA : STATE_EOF; break; case STATE_DATA: ts->chksum += data; ts->buf[ts->idx]= data; if(++ts->idx == ts->len) state = STATE_EOF; break; case STATE_EOF: state = STATE_SOF; if (data == CHAR_EOF || data == ts->chksum ) h3600ts_process_packet(ts); break; default: printk("Error3\n"); break; } } /* * h3600ts_connect() is the routine that is called when someone adds a * new serio device. It looks whether it was registered as a H3600 touchscreen * and if yes, registers it as an input device. */ static void h3600ts_connect(struct serio *serio, struct serio_dev *dev) { struct h3600_dev *ts; if (serio->type != (SERIO_RS232 | SERIO_H3600)) return; if (!(ts = kmalloc(sizeof(struct h3600_dev), GFP_KERNEL))) return; memset(ts, 0, sizeof(struct h3600_dev)); init_input_dev(&ts->dev); /* Device specific stuff */ set_GPIO_IRQ_edge( GPIO_BITSY_ACTION_BUTTON, GPIO_BOTH_EDGES ); set_GPIO_IRQ_edge( GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE ); if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler, SA_SHIRQ | SA_INTERRUPT | SA_SAMPLE_RANDOM, "h3600_action", &ts->dev)) { printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n"); kfree(ts); return; } if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler, SA_SHIRQ | SA_INTERRUPT | SA_SAMPLE_RANDOM, "h3600_suspend", &ts->dev)) { free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev); printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n"); kfree(ts); return; } /* Now we have things going we setup our input device */ ts->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_LED) | BIT(EV_PWR); ts->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y); ts->dev.ledbit[0] = BIT(LED_SLEEP); ts->dev.absmin[ABS_X] = 60; ts->dev.absmin[ABS_Y] = 35; ts->dev.absmax[ABS_X] = 985; ts->dev.absmax[ABS_Y] = 1024; ts->dev.absfuzz[ABS_X] = 0; ts->dev.absfuzz[ABS_Y] = 0; ts->serio = serio; serio->private = ts; set_bit(KEY_RECORD, ts->dev.keybit); set_bit(KEY_Q, ts->dev.keybit); set_bit(KEY_PROG1, ts->dev.keybit); set_bit(KEY_PROG2, ts->dev.keybit); set_bit(KEY_PROG3, ts->dev.keybit); set_bit(KEY_UP, ts->dev.keybit); set_bit(KEY_RIGHT, ts->dev.keybit); set_bit(KEY_LEFT, ts->dev.keybit); set_bit(KEY_DOWN, ts->dev.keybit); set_bit(KEY_ENTER, ts->dev.keybit); ts->dev.keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH); ts->dev.keybit[LONG(KEY_SUSPEND)] |= BIT(KEY_SUSPEND); sprintf(ts->phys, "%s/input0", serio->phys); ts->dev.event = h3600ts_event; ts->dev.private = ts; ts->dev.name = h3600_name; ts->dev.phys = ts->phys; ts->dev.id.bustype = BUS_RS232; ts->dev.id.vendor = SERIO_H3600; ts->dev.id.product = 0x0666; /* FIXME !!! We can ask the hardware */ ts->dev.id.version = 0x0100; if (serio_open(serio, dev)) { free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts); free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts); kfree(ts); return; } //h3600_flite_control(1, 25); /* default brightness */ #ifdef CONFIG_PM ts->dev.pm_dev = pm_register(PM_ILLUMINATION_DEV, PM_SYS_LIGHT, h3600ts_pm_callback); printk("registered pm callback\n"); #endif input_register_device(&ts->dev); printk(KERN_INFO "input: %s on %s\n", h3600_name, serio->phys); } /* * h3600ts_disconnect() is the opposite of h3600ts_connect() */ static void h3600ts_disconnect(struct serio *serio) { struct h3600_dev *ts = serio->private; free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev); free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev); input_unregister_device(&ts->dev); serio_close(serio); kfree(ts); } /* * The serio device structure. */ static struct serio_dev h3600ts_dev = { .interrupt = h3600ts_interrupt, .connect = h3600ts_connect, .disconnect = h3600ts_disconnect, }; /* * The functions for inserting/removing us as a module. */ static int __init h3600ts_init(void) { serio_register_device(&h3600ts_dev); return 0; } static void __exit h3600ts_exit(void) { serio_unregister_device(&h3600ts_dev); } module_init(h3600ts_init); module_exit(h3600ts_exit);