Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Parallel port to Walkera WK-0701 TX joystick
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Copyright (c) 2008 Peter Popovec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *  More about driver:  <file:Documentation/input/devices/walkera0701.rst>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #define RESERVE 20000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #define SYNC_PULSE 1306000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #define BIN0_PULSE 288000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define BIN1_PULSE 438000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define ANALOG_MIN_PULSE 318000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define ANALOG_MAX_PULSE 878000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define ANALOG_DELTA 80000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define BIN_SAMPLE ((BIN0_PULSE + BIN1_PULSE) / 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define NO_SYNC 25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/parport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/hrtimer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) MODULE_AUTHOR("Peter Popovec <popovec@fei.tuke.sk>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) MODULE_DESCRIPTION("Walkera WK-0701 TX as joystick");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static unsigned int walkera0701_pp_no;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) module_param_named(port, walkera0701_pp_no, int, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) MODULE_PARM_DESC(port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		 "Parallel port adapter for Walkera WK-0701 TX (default is 0)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  * For now, only one device is supported, if somebody need more devices, code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * can be expanded, one struct walkera_dev per device must be allocated and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * set up by walkera0701_connect (release of device by walkera0701_disconnect)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) struct walkera_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	unsigned char buf[25];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	u64 irq_time, irq_lasttime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	int counter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	int ack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	struct hrtimer timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	struct parport *parport;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	struct pardevice *pardevice;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static struct walkera_dev w_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static inline void walkera0701_parse_frame(struct walkera_dev *w)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	int val1, val2, val3, val4, val5, val6, val7, val8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	int magic, magic_bit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	int crc1, crc2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	for (crc1 = crc2 = i = 0; i < 10; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		crc1 += w->buf[i] & 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		crc2 += (w->buf[i] & 8) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	if ((w->buf[10] & 7) != (crc1 & 7))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (((w->buf[10] & 8) >> 3) != (((crc1 >> 3) + crc2) & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	for (crc1 = crc2 = 0, i = 11; i < 23; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		crc1 += w->buf[i] & 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		crc2 += (w->buf[i] & 8) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if ((w->buf[23] & 7) != (crc1 & 7))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	if (((w->buf[23] & 8) >> 3) != (((crc1 >> 3) + crc2) & 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	val1 = ((w->buf[0] & 7) * 256 + w->buf[1] * 16 + w->buf[2]) >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	val1 *= ((w->buf[0] >> 2) & 2) - 1;	/* sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	val2 = (w->buf[2] & 1) << 8 | (w->buf[3] << 4) | w->buf[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	val2 *= (w->buf[2] & 2) - 1;	/* sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	val3 = ((w->buf[5] & 7) * 256 + w->buf[6] * 16 + w->buf[7]) >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	val3 *= ((w->buf[5] >> 2) & 2) - 1;	/* sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	val4 = (w->buf[7] & 1) << 8 | (w->buf[8] << 4) | w->buf[9];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	val4 *= (w->buf[7] & 2) - 1;	/* sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	val5 = ((w->buf[11] & 7) * 256 + w->buf[12] * 16 + w->buf[13]) >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	val5 *= ((w->buf[11] >> 2) & 2) - 1;	/* sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	val6 = (w->buf[13] & 1) << 8 | (w->buf[14] << 4) | w->buf[15];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	val6 *= (w->buf[13] & 2) - 1;	/* sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	val7 = ((w->buf[16] & 7) * 256 + w->buf[17] * 16 + w->buf[18]) >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	val7 *= ((w->buf[16] >> 2) & 2) - 1;	/*sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	val8 = (w->buf[18] & 1) << 8 | (w->buf[19] << 4) | w->buf[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	val8 *= (w->buf[18] & 2) - 1;	/*sign */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	magic = (w->buf[21] << 4) | w->buf[22];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	magic_bit = (w->buf[24] & 8) >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	pr_debug("%4d %4d %4d %4d  %4d %4d %4d %4d (magic %2x %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		 val1, val2, val3, val4, val5, val6, val7, val8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		 magic, magic_bit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	input_report_abs(w->input_dev, ABS_X, val2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	input_report_abs(w->input_dev, ABS_Y, val1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	input_report_abs(w->input_dev, ABS_Z, val6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	input_report_abs(w->input_dev, ABS_THROTTLE, val3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	input_report_abs(w->input_dev, ABS_RUDDER, val4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	input_report_abs(w->input_dev, ABS_MISC, val7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	input_report_key(w->input_dev, BTN_GEAR_DOWN, val5 > 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static inline int read_ack(struct pardevice *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return parport_read_status(p->port) & 0x40;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* falling edge, prepare to BIN value calculation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static void walkera0701_irq_handler(void *handler_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	u64 pulse_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct walkera_dev *w = handler_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	w->irq_time = ktime_to_ns(ktime_get());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	pulse_time = w->irq_time - w->irq_lasttime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	w->irq_lasttime = w->irq_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	/* cancel timer, if in handler or active do resync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (unlikely(0 != hrtimer_try_to_cancel(&w->timer))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		w->counter = NO_SYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (w->counter < NO_SYNC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		if (w->ack) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 			pulse_time -= BIN1_PULSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			w->buf[w->counter] = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 			pulse_time -= BIN0_PULSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			w->buf[w->counter] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		if (w->counter == 24) {	/* full frame */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			walkera0701_parse_frame(w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			w->counter = NO_SYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			if (abs(pulse_time - SYNC_PULSE) < RESERVE)	/* new frame sync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 				w->counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			if ((pulse_time > (ANALOG_MIN_PULSE - RESERVE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			     && (pulse_time < (ANALOG_MAX_PULSE + RESERVE)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				pulse_time -= (ANALOG_MIN_PULSE - RESERVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				pulse_time = (u32) pulse_time / ANALOG_DELTA;	/* overtiping is safe, pulsetime < s32.. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				w->buf[w->counter++] |= (pulse_time & 7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 				w->counter = NO_SYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	} else if (abs(pulse_time - SYNC_PULSE - BIN0_PULSE) <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 				RESERVE + BIN1_PULSE - BIN0_PULSE)	/* frame sync .. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		w->counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	hrtimer_start(&w->timer, BIN_SAMPLE, HRTIMER_MODE_REL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static enum hrtimer_restart timer_handler(struct hrtimer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 					  *handle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct walkera_dev *w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	w = container_of(handle, struct walkera_dev, timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	w->ack = read_ack(w->pardevice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	return HRTIMER_NORESTART;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static int walkera0701_open(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	struct walkera_dev *w = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	if (parport_claim(w->pardevice))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	parport_enable_irq(w->parport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static void walkera0701_close(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct walkera_dev *w = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	parport_disable_irq(w->parport);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	hrtimer_cancel(&w->timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	parport_release(w->pardevice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static void walkera0701_attach(struct parport *pp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct pardev_cb walkera0701_parport_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	struct walkera_dev *w = &w_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (pp->number != walkera0701_pp_no) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		pr_debug("Not using parport%d.\n", pp->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (pp->irq == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		pr_err("parport %d does not have interrupt assigned\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			pp->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	w->parport = pp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	memset(&walkera0701_parport_cb, 0, sizeof(walkera0701_parport_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	walkera0701_parport_cb.flags = PARPORT_FLAG_EXCL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	walkera0701_parport_cb.irq_func = walkera0701_irq_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	walkera0701_parport_cb.private = w;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	w->pardevice = parport_register_dev_model(pp, "walkera0701",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 						  &walkera0701_parport_cb, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (!w->pardevice) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		pr_err("failed to register parport device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	if (parport_negotiate(w->pardevice->port, IEEE1284_MODE_COMPAT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		pr_err("failed to negotiate parport mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		goto err_unregister_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	hrtimer_init(&w->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	w->timer.function = timer_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	w->input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	if (!w->input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		pr_err("failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		goto err_unregister_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	input_set_drvdata(w->input_dev, w);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	w->input_dev->name = "Walkera WK-0701 TX";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	w->input_dev->phys = w->parport->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	w->input_dev->id.bustype = BUS_PARPORT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	/* TODO what id vendor/product/version ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	w->input_dev->id.vendor = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	w->input_dev->id.product = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	w->input_dev->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	w->input_dev->dev.parent = w->parport->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	w->input_dev->open = walkera0701_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	w->input_dev->close = walkera0701_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	w->input_dev->evbit[0] = BIT(EV_ABS) | BIT_MASK(EV_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	w->input_dev->keybit[BIT_WORD(BTN_GEAR_DOWN)] = BIT_MASK(BTN_GEAR_DOWN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	input_set_abs_params(w->input_dev, ABS_X, -512, 512, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	input_set_abs_params(w->input_dev, ABS_Y, -512, 512, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	input_set_abs_params(w->input_dev, ABS_Z, -512, 512, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	input_set_abs_params(w->input_dev, ABS_THROTTLE, -512, 512, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	input_set_abs_params(w->input_dev, ABS_RUDDER, -512, 512, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	input_set_abs_params(w->input_dev, ABS_MISC, -512, 512, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (input_register_device(w->input_dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		pr_err("failed to register input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		goto err_free_input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) err_free_input_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	input_free_device(w->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) err_unregister_device:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	parport_unregister_device(w->pardevice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) static void walkera0701_detach(struct parport *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	struct walkera_dev *w = &w_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (!w->pardevice || w->parport->number != port->number)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	input_unregister_device(w->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	parport_unregister_device(w->pardevice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	w->parport = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static struct parport_driver walkera0701_parport_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.name = "walkera0701",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.match_port = walkera0701_attach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.detach = walkera0701_detach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.devmodel = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) static int __init walkera0701_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	return parport_register_driver(&walkera0701_parport_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static void __exit walkera0701_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	parport_unregister_driver(&walkera0701_parport_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) module_init(walkera0701_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) module_exit(walkera0701_exit);