| /* |
| * $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 <jsimmons@transvirtual.com>. |
| */ |
| |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/input.h> |
| #include <linux/serio.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| |
| /* SA1100 serial defines */ |
| #include <asm/arch/hardware.h> |
| #include <asm/arch/irqs.h> |
| |
| #define DRIVER_DESC "H3600 touchscreen driver" |
| |
| MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>"); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| /* |
| * 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 */ |
| |
| /* |
| * 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 irqreturn_t action_button_handler(int irq, void *dev_id) |
| { |
| int down = (GPLR & GPIO_BITSY_ACTION_BUTTON) ? 0 : 1; |
| struct input_dev *dev = (struct input_dev *) dev_id; |
| |
| input_report_key(dev, KEY_ENTER, down); |
| input_sync(dev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t npower_button_handler(int irq, void *dev_id) |
| { |
| 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_report_key(dev, KEY_SUSPEND, 1); |
| input_report_key(dev, KEY_SUSPEND, down); |
| input_sync(dev); |
| |
| return IRQ_HANDLED; |
| } |
| |
| #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 = input_get_drvdata(dev); |
| |
| /* 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; |
| } |
| |
| #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 input_dev *dev = ts->dev; |
| static int touched = 0; |
| int key, down = 0; |
| |
| 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) |
| { |
| #if 0 |
| struct h3600_dev *ts = input_get_drvdata(dev); |
| |
| switch (type) { |
| case EV_LED: { |
| // ts->serio->write(ts->serio, SOME_CMD); |
| return 0; |
| } |
| } |
| return -1; |
| #endif |
| return 0; |
| } |
| |
| /* |
| 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 irqreturn_t h3600ts_interrupt(struct serio *serio, unsigned char data, |
| unsigned int flags) |
| { |
| struct h3600_dev *ts = serio_get_drvdata(serio); |
| |
| /* |
| * We have a new frame coming in. |
| */ |
| switch (state) { |
| case STATE_SOF: |
| if (data == CHAR_SOF) |
| state = STATE_ID; |
| break; |
| 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; |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * h3600ts_connect() is the routine that is called when someone adds a |
| * new serio device that supports H3600 protocol and registers it as |
| * an input device. |
| */ |
| static int h3600ts_connect(struct serio *serio, struct serio_driver *drv) |
| { |
| struct h3600_dev *ts; |
| struct input_dev *input_dev; |
| int err; |
| |
| ts = kzalloc(sizeof(struct h3600_dev), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!ts || !input_dev) { |
| err = -ENOMEM; |
| goto fail1; |
| } |
| |
| ts->serio = serio; |
| ts->dev = input_dev; |
| snprintf(ts->phys, sizeof(ts->phys), "%s/input0", serio->phys); |
| |
| input_dev->name = "H3600 TouchScreen"; |
| input_dev->phys = ts->phys; |
| input_dev->id.bustype = BUS_RS232; |
| input_dev->id.vendor = SERIO_H3600; |
| input_dev->id.product = 0x0666; /* FIXME !!! We can ask the hardware */ |
| input_dev->id.version = 0x0100; |
| input_dev->dev.parent = &serio->dev; |
| |
| input_set_drvdata(input_dev, ts); |
| |
| input_dev->event = h3600ts_event; |
| |
| input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) | |
| BIT_MASK(EV_LED) | BIT_MASK(EV_PWR); |
| input_dev->ledbit[0] = BIT_MASK(LED_SLEEP); |
| input_set_abs_params(input_dev, ABS_X, 60, 985, 0, 0); |
| input_set_abs_params(input_dev, ABS_Y, 35, 1024, 0, 0); |
| |
| set_bit(KEY_RECORD, input_dev->keybit); |
| set_bit(KEY_Q, input_dev->keybit); |
| set_bit(KEY_PROG1, input_dev->keybit); |
| set_bit(KEY_PROG2, input_dev->keybit); |
| set_bit(KEY_PROG3, input_dev->keybit); |
| set_bit(KEY_UP, input_dev->keybit); |
| set_bit(KEY_RIGHT, input_dev->keybit); |
| set_bit(KEY_LEFT, input_dev->keybit); |
| set_bit(KEY_DOWN, input_dev->keybit); |
| set_bit(KEY_ENTER, input_dev->keybit); |
| set_bit(KEY_SUSPEND, input_dev->keybit); |
| set_bit(BTN_TOUCH, input_dev->keybit); |
| |
| /* 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, |
| IRQF_SHARED | IRQF_DISABLED, "h3600_action", &ts->dev)) { |
| printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n"); |
| err = -EBUSY; |
| goto fail2; |
| } |
| |
| if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler, |
| IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", &ts->dev)) { |
| printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n"); |
| err = -EBUSY; |
| goto fail3; |
| } |
| |
| serio_set_drvdata(serio, ts); |
| |
| err = serio_open(serio, drv); |
| if (err) |
| return err; |
| |
| //h3600_flite_control(1, 25); /* default brightness */ |
| input_register_device(ts->dev); |
| |
| return 0; |
| |
| fail3: free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev); |
| fail2: free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev); |
| fail1: serio_set_drvdata(serio, NULL); |
| input_free_device(input_dev); |
| kfree(ts); |
| return err; |
| } |
| |
| /* |
| * h3600ts_disconnect() is the opposite of h3600ts_connect() |
| */ |
| |
| static void h3600ts_disconnect(struct serio *serio) |
| { |
| struct h3600_dev *ts = serio_get_drvdata(serio); |
| |
| free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev); |
| free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev); |
| input_get_device(ts->dev); |
| input_unregister_device(ts->dev); |
| serio_close(serio); |
| serio_set_drvdata(serio, NULL); |
| input_put_device(ts->dev); |
| kfree(ts); |
| } |
| |
| /* |
| * The serio driver structure. |
| */ |
| |
| static struct serio_device_id h3600ts_serio_ids[] = { |
| { |
| .type = SERIO_RS232, |
| .proto = SERIO_H3600, |
| .id = SERIO_ANY, |
| .extra = SERIO_ANY, |
| }, |
| { 0 } |
| }; |
| |
| MODULE_DEVICE_TABLE(serio, h3600ts_serio_ids); |
| |
| static struct serio_driver h3600ts_drv = { |
| .driver = { |
| .name = "h3600ts", |
| }, |
| .description = DRIVER_DESC, |
| .id_table = h3600ts_serio_ids, |
| .interrupt = h3600ts_interrupt, |
| .connect = h3600ts_connect, |
| .disconnect = h3600ts_disconnect, |
| }; |
| |
| /* |
| * The functions for inserting/removing us as a module. |
| */ |
| |
| static int __init h3600ts_init(void) |
| { |
| return serio_register_driver(&h3600ts_drv); |
| } |
| |
| static void __exit h3600ts_exit(void) |
| { |
| serio_unregister_driver(&h3600ts_drv); |
| } |
| |
| module_init(h3600ts_init); |
| module_exit(h3600ts_exit); |