Hi all, this is my problem.
I have written a ts driver for my ADS7843 + et057003dh6 ts as a input device:
this is my driver:
static unsigned short __read_spi(unsigned char inreg)
{
unsigned char i;
unsigned char mask = 0x80;
unsigned short res = 0;
inreg |= 0x80; // S bit always high
CS_L;
udelay(50);
((inreg & mask) ? DIN_H : DIN_L);
udelay(__U_DELAY);
for (i = 0; i < 8; i++) {
DCLK_H;
udelay(__U_DELAY);
DCLK_L;
mask >>= 1;
((inreg & mask) ? DIN_H : DIN_L);
udelay(__U_DELAY);
}
DIN_L;
for (i = 0; i < 16; i++) {
DCLK_H;
if (IS_DOUT_H) res |= 0x01;
res <<= 1;
udelay(__U_DELAY);
DCLK_L;
udelay(__U_DELAY);
}
CS_H;
return (res >> 4);
//return ((res & 0x7fff) >> 3); // real
}
static irqreturn_t button_interrupt(int irq, void *dev, struct pt_regs *regs)
{
int absx = 0, absy = 0;
unsigned short retdebug = 0;
absx = retdebug = __read_spi(READ_X);
DBG(ET05700x_DEBUG_INT,"%s:READ_X = 0x%02x,0x%04x\n",button_dev-
>name,READ_X,retdebug);
absy = retdebug = __read_spi(READ_Y);
DBG(ET05700x_DEBUG_INT,"%s:READ_Y = 0x%02x,0x%04x\n",button_dev-
>name,READ_Y,retdebug);
// input_report_key(button_dev, BTN_1, 0);
input_report_key(button_dev, BTN_TOUCH, 1);
input_report_abs(button_dev, ABS_X, absx);
input_report_abs(button_dev, ABS_Y, absy);
input_sync(button_dev);
return IRQ_HANDLED;
}
static int __init button_init(void)
{
// Name referred to slave devices ads7843
//BEGIN setting the I/O ports
// DCLK
ctrl_outw(ctrl_inw(PFCRH4) & ~0x0010 ,PFCRH4 ) ; /* PF29 set as I/O
port */
ctrl_outw(ctrl_inw(PFIORH) | 0x2000 ,PFIORH ) ; /* PF29 set as out port
*/
// CS
ctrl_outw(ctrl_inw(PFCRH3) & ~0x0001 ,PFCRH3 ) ; /* PF24 set as I/O
port */
ctrl_outw(ctrl_inw(PFIORH) | 0x0100 ,PFIORH ) ; /* PF24 set as out port
*/
// DIN
ctrl_outw(ctrl_inw(PFCRH4) & ~0x0001 ,PFCRH4 ) ; /* PF28 set as I/O
port */
ctrl_outw(ctrl_inw(PFIORH) | 0x1000 ,PFIORH ) ; /* PF28 set as out port
*/
// DOUT
ctrl_outw(ctrl_inw(PFCRH3) & ~0x1000 ,PFCRH3 ) ; /* PF27 set as I/O
port */
ctrl_outw(ctrl_inw(PFIORH) & ~0x0800 ,PFIORH ) ; /* PF27 set as input
port */
// BUSY
ctrl_outw(ctrl_inw(PECRL4) & ~0x3000 ,PECRL4 ) ; /* PE15 set as I/O
port */
ctrl_outw(ctrl_inw(PEIORL) & ~0x8000 ,PEIORL ) ; /* PE15 set as input
port */
CS_H;
DCLK_L;
DIN_L;
//END setting I/O ports
button_dev = input_allocate_device();
if (!button_dev)
return -ENOMEM;
button_dev->name = "et057003dh6_ts";
button_dev->phys = "/dev/input/event0";
// button_dev->evbit[0] = BIT(EV_KEY);
// button_dev->keybit[LONG(BTN_0)] = BIT(BTN_0);
button_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY);
button_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
button_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
button_dev->absmin[ABS_X] = ET057003DH6_TS_ABS_X_MIN;
button_dev->absmin[ABS_Y] = ET057003DH6_TS_ABS_Y_MIN;
button_dev->absmax[ABS_X] = ET057003DH6_TS_ABS_X_MAX;
button_dev->absmax[ABS_Y] = ET057003DH6_TS_ABS_Y_MAX;
input_register_device(button_dev);
if (request_irq(BUTTON_IRQ, button_interrupt, 0, "button", NULL)) {
PRINTK(KERN_ERR "button.c: Can't allocate irq %d\n",
BUTTON_IRQ);
input_unregister_device(button_dev);
return -EBUSY;
}
DBG(ET05700x_DEBUG_FUNC,"%s:initialized\n",button_dev->name);
return 0;
}
static void __exit button_exit(void)
{
input_unregister_device(button_dev);
free_irq(BUTTON_IRQ, button_interrupt);
}
module_init(button_init);
module_exit(button_exit);
MODULE_AUTHOR("Fabio Giovagnini <fabio.giovag...@aurion-tech.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
well, my application does the follwing:
int version=0;
fd = -1;
struct input_devinfo device_info;
if ((fd = open(devname,O_RDONLY | O_NONBLOCK)) < 0) {
PRINTF("version = %d \n",version);
return 0;
}
else {
PRINTF("%s open successfully.\n",devname);
}
ioctl(fd,EVIOCGVERSION,&version);
PRINTF("version = %d \n",version);
PRINTF("evdev driver version is %d.%d.%d\n",version >> 16, (version >>
8) &
0xff, version & 0xff);
//geting info from device
ioctl(fd,EVIOCGID,&device_info);
printf("vendor 0x%04hx product 0x%04hx version 0x%04hx is on ?\n",
device_info.vendor, device_info.product,
device_info.version);
.
.
.
fd_set readfds;
struct timeval to;
int r;
size_t rb;
/* the events (up to 64 at once) */
#define EVLEN_BFF 5
#define NUM_MIN_EV (EVLEN_BFF - 1)
struct input_event ev[EVLEN_BFF];
int yalv;
int nReadEv; // number of read events
unsigned long xAbsAvarage = 0;
unsigned long yAbsAvarage = 0;
if (fd < 0) return 0;
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
to.tv_sec = 0;
to.tv_usec = 1000;
r = select(FD_SETSIZE, &readfds, NULL, NULL, &to);
if (r <= 0) {
PRINTF("ts 1\n");
return 0;
}
rb=read(fd,ev,sizeof(struct input_event)*EVLEN_BFF);
if (rb < (int) sizeof(struct input_event)) {
PRINTF("ts 2\n");
return 0;
}
nReadEv = (int) (rb / sizeof(struct input_event));
if (nReadEv < NUM_MIN_EV) return 0;
.
.
.
.
The behaviour is:
I press the touch and I get printk infos properly form my driver and evbug
moduls; but even if i open O_NONBLOCK my device i can really read infos from
the kernel only when I release my finger from then ts
It seems O_NONBLOCK doesn't work on evdev.
Any suggestions?
Thanks in advance
--
Fabio Giovagnini
Aurion s.r.l.
P.I e C.F.
00885711200
Tel. +39.051.594.78.24
Cell. +39.335.83.50.919
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