Add firmware for the ATUSB IEEE 802.15.4 USB Adapter

[linux-libre-firmware.git] / atusb / board_hulusb.c

diff --git a/atusb/board_hulusb.c b/atusb/board_hulusb.c
new file mode 100644 (file)
index 0000000..084714e
--- /dev/null
+++ b/atusb/board_hulusb.c
@@ -0,0 +1,179 @@
+/*
+ * fw/board_hulusb.c - Busware HUL Board-specific functions (for boot loader and application)
+ *
+ * Written 2017 by Filzmaier Josef
+ * Based on fw/board_rzusb written and Copyright 2016 Stefan Schmidt
+ *
+ * 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 <stdbool.h>
+#include <stdint.h>
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <avr/boot.h>
+
+#define F_CPU   8000000UL
+#include <util/delay.h>
+
+#include "usb.h"
+#include "at86rf230.h"
+#include "board.h"
+#include "spi.h"
+#include "usb/usb.h"
+
+static bool spi_initialized = 0;
+
+void reset_rf(void)
+{
+       /* set up all the outputs; default port value is 0 */
+
+       DDRB = 0;
+       DDRC = 0;
+       DDRD = 0;
+       PORTB = 0;
+       PORTC = 0;
+       PORTD = 0;
+
+       OUT(LED_RED);
+       OUT(LED_GREEN);
+       SET(LED_RED); /* Leds are active low on HULUSB board */
+       CLR(LED_GREEN); /* Green Led indicates the dongle is running */
+       OUT(nRST_RF);   /* this also resets the transceiver */
+       OUT(SLP_TR);
+
+       spi_init();
+
+       /* AT86RF212 data sheet, Appendix B, p166 Power-On Reset procedure */
+       /*-----------------------------------------------------------------*/
+       CLR(SLP_TR);
+       SET(nRST_RF);
+       SET(nSS);
+       _delay_us(400);
+
+       CLR(nRST_RF);
+       _delay_us(2);
+       SET(nRST_RF);
+
+       /* 5.1.4.5: Wait t10: 625 ns (min) */
+
+       _delay_us(2);
+
+       reg_write(REG_TRX_CTRL_0, 0x19);
+
+       change_state(TRX_CMD_FORCE_TRX_OFF);
+       /*-----------------------------------------------------------------*/
+
+       /* we must restore TRX_CTRL_0 after each reset (7.7.4) */
+
+       set_clkm();
+}
+
+void led_red(bool on) {
+       if (on)
+               CLR(LED_RED);
+       else
+               SET(LED_RED);
+}
+
+void led_green(bool on) {
+       if (on)
+               CLR(LED_GREEN);
+       else
+               SET(LED_GREEN);
+}
+
+void led(bool on)
+{
+       led_red(on);
+}
+
+void set_clkm(void)
+{
+       /* CLKM is not connected on BUSWARE HUL and therefore it is running in
+        * async mode. */
+       reg_write(REG_TRX_CTRL_0, 0x00);
+
+       /* TX_AUTO_CRC_ON, default disabled */
+       subreg_write(SR_TX_AUTO_CRC_ON, 1);
+}
+
+void board_init(void)
+{
+       /* Disable the watchdog timer */
+
+       MCUSR = 0;              /* Remove override */
+       WDTCSR |= 1 << WDCE;    /* Enable change */
+       WDTCSR = 1 << WDCE;     /* Disable watchdog while still enabling
+       change */
+
+       CLKPR = 1 << CLKPCE;
+       /* We start with a 16 MHz/8 clock. Put the prescaler to 2. */
+       CLKPR = 1 << CLKPS0;
+
+       get_sernum();
+}
+
+void spi_begin(void)
+{
+       if (!spi_initialized)
+               spi_init();
+       CLR(nSS);
+}
+
+void spi_off(void)
+{
+       spi_initialized = 0;
+       SPCR &= ~(1 << SPE);
+}
+
+void spi_init(void)
+{
+       SET(nSS);
+       OUT(SCLK);
+       OUT(MOSI);
+       OUT(nSS);
+       IN(MISO);
+
+       SPCR = (1 << SPE) | (1 << MSTR);
+       SPSR = (1 << SPI2X);
+
+       spi_initialized = 1;
+}
+
+void usb_init(void)
+{
+       USBCON |= 1 << FRZCLK;          /* freeze the clock */
+
+       /* enable the PLL and wait for it to lock */
+       /* TODO sheet page 50 For Atmel AT90USB128x only. Do not use with Atmel AT90USB64x. */
+       /*  FOR 8 XTAL Mhz only!!! */
+       PLLCSR = ((1 << PLLP1) | (1 << PLLP0));
+       PLLCSR |= 1 << PLLE;
+       while (!(PLLCSR & (1 << PLOCK)));
+
+       UHWCON |= (1 << UVREGE);
+
+       USBCON &= ~((1 << USBE) | (1 << OTGPADE));              /* reset the controller */
+       USBCON |= ((1 << USBE) | (1 << OTGPADE));
+
+       USBCON &= ~(1 << FRZCLK);       /* thaw the clock */
+
+       UDCON &= ~(1 << DETACH);        /* attach the pull-up */
+       UDIEN = 1 << EORSTE;            /* enable device interrupts  */
+       //      UDCON |= 1 << RSTCPU;           /* reset CPU on bus reset */
+
+       ep_init();
+}
+
+void board_app_init(void)
+{
+       /* enable INT0, trigger on rising edge */
+       EICRA = 1 << ISC01 | 1 << ISC00;
+       EIMSK = 1 << INT0;
+}