X-Git-Url: https://jxself.org/git/?p=linux-libre-firmware.git;a=blobdiff_plain;f=atusb%2Fboard_app.c;fp=atusb%2Fboard_app.c;h=1fa9bf43b924d008ab6aeec9013aeb1b090b5f1c;hp=0000000000000000000000000000000000000000;hb=dd4bc9ff49b9a7075e579fdd62fd930d27a9a7df;hpb=c164bf7f87f9081fee7e1a186dd7a87a9a020b9e

diff --git a/atusb/board_app.c b/atusb/board_app.c
new file mode 100644
index 0000000..1fa9bf4
--- /dev/null
+++ b/atusb/board_app.c
@@ -0,0 +1,173 @@
+/*
+ * fw/board_app.c - Board-specific functions (for the application)
+ *
+ * Written 2011, 2013 by Werner Almesberger
+ * Copyright 2011, 2013 Werner Almesberger
+ *
+ * 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.
+ */
+
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#define F_CPU   8000000UL
+#include <util/delay.h>
+
+#include "usb.h"
+#include "at86rf230.h"
+#include "spi.h"
+#include "mac.h"
+#include "board.h"
+
+
+static volatile uint32_t timer_h = 0;	/* 2^(16+32) / 8 MHz = ~1.1 years */
+
+
+void reset_cpu(void)
+{
+	WDTCSR = 1 << WDE;
+}
+
+
+uint8_t read_irq(void)
+{
+	return PIN(IRQ_RF);
+}
+
+
+void slp_tr(void)
+{
+	SET(SLP_TR);
+	CLR(SLP_TR);
+}
+
+
+ISR(TIMER1_OVF_vect)
+{
+	timer_h++;
+}
+
+
+uint64_t timer_read(void)
+{
+	uint32_t high;
+	uint8_t low, mid;
+
+	do {
+		if (TIFR1 & (1 << TOV1)) {
+			TIFR1 = 1 << TOV1;
+			timer_h++;
+		}
+		high = timer_h;
+		low = TCNT1L;
+		mid = TCNT1H;
+	}
+	while (TIFR1 & (1 << TOV1));
+
+	/*
+	 * We need all these casts because the intermediate results are handled
+	 * as if they were signed and thus get sign-expanded. Sounds wrong-ish.
+	 */
+	return (uint64_t) high << 16 | (uint64_t) mid << 8 | (uint64_t) low;
+}
+
+
+void timer_init(void)
+{
+	/* configure timer 1 as a free-running CLK counter */
+
+	TCCR1A = 0;
+	TCCR1B = 1 << CS10;
+
+	/* enable timer overflow interrupt */
+
+	TIMSK1 = 1 << TOIE1;
+}
+
+
+bool gpio(uint8_t port, uint8_t data, uint8_t dir, uint8_t mask, uint8_t *res)
+{
+	EIMSK = 0; /* recover INT_RF to ATUSB_GPIO_CLEANUP or an MCU reset */
+
+	switch (port) {
+	case 1:
+		DDRB = (DDRB & ~mask) | dir;
+		PORTB = (PORTB & ~mask) | data;
+		break;
+	case 2:
+		DDRC = (DDRC & ~mask) | dir;
+		PORTC = (PORTC & ~mask) | data;
+		break;
+	case 3:
+		DDRD = (DDRD & ~mask) | dir;
+		PORTD = (PORTD & ~mask) | data;
+		break;
+	default:
+		return 0;
+	}
+
+	/* disable the UART so that we can meddle with these pins as well. */
+	spi_off();
+	_delay_ms(1);
+
+	switch (port) {
+	case 1:
+		res[0] = PINB;
+		res[1] = PORTB;
+		res[2] = DDRB;
+		break;
+	case 2:
+		res[0] = PINC;
+		res[1] = PORTC;
+		res[2] = DDRC;
+		break;
+	case 3:
+		res[0] = PIND;
+		res[1] = PORTD;
+		res[2] = DDRD;
+		break;
+	}
+
+	return 1;
+}
+
+
+void gpio_cleanup(void)
+{
+	EIMSK = 1 << 0;
+}
+
+
+static void done(void *user)
+{
+	led(0);
+}
+
+
+uint8_t irq_serial;
+
+#if defined(ATUSB) || defined(HULUSB)
+ISR(INT0_vect)
+#endif
+#ifdef RZUSB
+ISR(TIMER1_CAPT_vect)
+#endif
+{
+	if (mac_irq) {
+		if (mac_irq())
+			return;
+	}
+	if (eps[1].state == EP_IDLE) {
+		led(1);
+		irq_serial = (irq_serial+1) | 0x80;
+		usb_send(&eps[1], &irq_serial, 1, done, NULL);
+	}
+}