diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/input/touchscreen/h3600_ts_input.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/input/touchscreen/h3600_ts_input.c | 494 |
1 files changed, 494 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/drivers/input/touchscreen/h3600_ts_input.c b/ANDROID_3.4.5/drivers/input/touchscreen/h3600_ts_input.c new file mode 100644 index 00000000..6107e563 --- /dev/null +++ b/ANDROID_3.4.5/drivers/input/touchscreen/h3600_ts_input.c @@ -0,0 +1,494 @@ +/* + * 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 <mach/hardware.h> +#include <mach/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/response) */ +#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 = 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 = 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 */ + serio_write(ts->serio, 1); + serio_write(ts->serio, pwr); + 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: { + // 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, "h3600_action", ts->dev)) { + printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n"); + err = -EBUSY; + goto fail1; + } + + if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler, + IRQF_SHARED, "h3600_suspend", ts->dev)) { + printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n"); + err = -EBUSY; + goto fail2; + } + + serio_set_drvdata(serio, ts); + + err = serio_open(serio, drv); + if (err) + goto fail3; + + //h3600_flite_control(1, 25); /* default brightness */ + err = input_register_device(ts->dev); + if (err) + goto fail4; + + return 0; + +fail4: serio_close(serio); +fail3: serio_set_drvdata(serio, NULL); + free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev); +fail2: free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev); +fail1: 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); |