mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-18 09:35:20 +02:00
367 lines
7.3 KiB
C
367 lines
7.3 KiB
C
/*
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* lib/atusb-common.c - ATUSB access functions shared by all ATUSB drivers
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*
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* Written 2010-2011 by Werner Almesberger
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* Copyright 2010-2011 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <usb.h>
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#include <errno.h>
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#include "atusb/ep0.h"
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#include "atusb/usb-ids.h"
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#include "at86rf230.h"
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#include "usbopen.h"
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#include "driver.h"
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#include "atusb-common.h"
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/* ----- error handling ---------------------------------------------------- */
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int atusb_error(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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return dsc->error;
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}
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int atusb_clear_error(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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int ret;
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ret = dsc->error;
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dsc->error = 0;
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return ret;
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}
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/* ----- open/close -------------------------------------------------------- */
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void *atusb_open(const char *arg)
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{
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usb_dev_handle *dev;
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struct atusb_dsc *dsc;
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int res;
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usb_unrestrict();
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if (arg)
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restrict_usb_path(arg);
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dev = open_usb(USB_VENDOR, USB_PRODUCT);
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if (!dev) {
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if (errno == EPERM)
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fprintf(stderr, "Permission denied. "
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"You may need to become root.\n");
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else
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fprintf(stderr, ":-(\n");
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return NULL;
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}
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res = usb_claim_interface(dev, 0);
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if (res == -EPERM) {
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fprintf(stderr,
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"Permission denied. You may need to become root.\n");
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return NULL;
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}
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if (res) {
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fprintf(stderr, "usb_claim_interface: %d\n", res);
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return NULL;
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}
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dsc = malloc(sizeof(*dsc));
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if (!dsc) {
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perror("malloc");
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exit(1);
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}
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dsc->dev = dev;
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dsc->error = 0;
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atusb_driver.reg_read(dsc, REG_IRQ_STATUS);
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return dsc;
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}
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void atusb_close(void *handle)
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{
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/* to do */
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}
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/* ----- device mode ------------------------------------------------------- */
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void atusb_reset(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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int res;
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if (dsc->error)
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return;
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res =
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usb_control_msg(dsc->dev, TO_DEV, ATUSB_RESET, 0, 0, NULL, 0, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_RESET: %d\n", res);
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dsc->error = 1;
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}
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}
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void atusb_reset_rf(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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int res;
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if (dsc->error)
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return;
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res = usb_control_msg(dsc->dev, TO_DEV, ATUSB_RF_RESET, 0, 0, NULL,
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0, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_RF_RESET: %d\n", res);
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dsc->error = 1;
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}
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}
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void atusb_test_mode(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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int res;
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if (dsc->error)
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return;
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res =
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usb_control_msg(dsc->dev, TO_DEV, ATUSB_TEST, 0, 0, NULL, 0, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_TEST: %d\n", res);
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dsc->error = 1;
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}
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}
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/* ----- SLP_TR ------------------------------------------------------------ */
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void atusb_slp_tr(void *handle, int on, int pulse)
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{
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struct atusb_dsc *dsc = handle;
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int res;
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if (dsc->error)
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return;
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if (!on || !pulse) {
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fprintf(stderr,
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"SLP_TR mode on=%d pulse=%d not supported\n", on, pulse);
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return;
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}
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res = usb_control_msg(dsc->dev, TO_DEV, ATUSB_SLP_TR, 0, 0, NULL, 0,
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1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_SLP_TR: %d\n", res);
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dsc->error = 1;
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}
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}
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/* ----- RF interrupt ------------------------------------------------------ */
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/*
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* The logic here is a bit tricky. Assuming that we can get a lot of
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* interrupts, system state can change as follows:
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*
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* Event IRQ_STATUS EP1 on atusb EP1 on host irq
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* INT (var)
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* -------------------- ------- --- ------------ ----------- -----
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* interrupt A A H EP_IDLE - -
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* INT0 handler - - EP_TX (A) - -
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* interrupt B B H EP_TX (A) - -
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* INT0 handler B H EP_TX (A) - -
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* IN from host B H EP_IDLE A -
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* interrupt C B+C H EP_IDLE A -
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* call to atusb_interrupt_wait
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* read IRQ_STATUS - - EP_IDLE A B+C
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* interrupt D D H EP_IDLE A B+C
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* INT0 handler - - EP_TX (D) A B+C
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* IN from host - - EP_IDLE A, D B+C
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* usb_bulk_read - - EP_IDLE - A+B+C+D
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* usb_bulk_read -> no more data, done
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*
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* We therefore have to consider interrupts queued up at the host and pending
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* in REG_IRQ_STATUS in addition to anything that may arrive while we wait.
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*/
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int atusb_interrupt_wait(void *handle, int timeout_ms)
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{
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struct atusb_dsc *dsc = handle;
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char buf;
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int res;
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if (dsc->error)
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return 0;
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res = usb_bulk_read(dsc->dev, 1,
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(char *) &buf, sizeof(buf), timeout_ms);
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if (res == -ETIMEDOUT)
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return 0;
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if (res < 0) {
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fprintf(stderr, "usb_bulk_read: %d\n", res);
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dsc->error = 1;
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return 0; /* handle this via atrf_error */
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}
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return atusb_driver.reg_read(handle, REG_IRQ_STATUS);
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}
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/* ----- CLKM handling ----------------------------------------------------- */
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/*
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* ATmega32U2-based boards don't allow disabling CLKM, so we keep it at 8 MHz.
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* We could accommodate a choice between 8 MHz and 16 MHz, but that's for
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* later.
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*/
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int atusb_set_clkm(void *handle, int mhz)
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{
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struct atusb_dsc *dsc = handle;
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uint8_t ids[3];
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int res;
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if (dsc->error)
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return 0;
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res = usb_control_msg(dsc->dev, FROM_DEV, ATUSB_ID, 0, 0,
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(void *) ids, 3, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_ID: %s\n", usb_strerror());
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dsc->error = 1;
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return 0;
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}
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switch (ids[2]) {
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case HW_TYPE_100813:
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case HW_TYPE_101216:
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break;
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case HW_TYPE_110131:
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if (mhz == 0 || mhz == 8)
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return 1;
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fprintf(stderr, "this board only supports CLKM = 8 MHz\n");
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return 0;
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default:
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fprintf(stderr,
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"atusb_set_clkm: unknown hardware type 0x%02x\n", ids[2]);
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return 0;
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}
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return atrf_set_clkm_generic(atusb_driver.reg_write, dsc, mhz);
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}
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/* ----- HardMAC ----------------------------------------------------------- */
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void atusb_rx_mode(void *handle, int on)
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{
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struct atusb_dsc *dsc = handle;
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int res;
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if (dsc->error)
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return;
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res = usb_control_msg(dsc->dev, TO_DEV, ATUSB_RX_MODE,
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on, 0, NULL, 0, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_RX_MODE: %d\n", res);
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dsc->error = 1;
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}
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}
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int atusb_rx(void *handle, void *buf, int size, uint8_t *lqi)
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{
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struct atusb_dsc *dsc = handle;
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uint8_t len;
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int res;
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uint8_t tmp[MAX_PSDU+2]; /* PHR, LQI */
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/*
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* Seems that either the USB stack of libusb doesn't like it if we do a
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* read of size one followed by the full read. Therefore, we just do
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* a maximum-sized read and hope that we don't split packets.
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*/
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res = usb_bulk_read(dsc->dev, 1, (char *) tmp, sizeof(tmp), 0);
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if (res < 0) {
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fprintf(stderr, "usb_bulk_read: %d\n", res);
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dsc->error = 1;
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return 0;
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}
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len = tmp[0];
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if (len & 0x80) {
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fprintf(stderr, "atusb_rx: invalid length 0x%02x\n", len);
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return 0;
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}
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if (len > size) {
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fprintf(stderr, "atusb_rx: len %u > size %d\n", len, size);
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return 0;
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}
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if (len > res+2) {
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fprintf(stderr, "atusb_rx: len %u > res %d+2\n", len, res);
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return 0;
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}
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memcpy(buf, tmp+1, len);
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if (lqi)
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*lqi = tmp[len+1];
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return len;
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}
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void atusb_tx(void *handle, const void *buf, int size)
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{
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struct atusb_dsc *dsc = handle;
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int res;
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if (dsc->error)
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return;
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res = usb_control_msg(dsc->dev, TO_DEV, ATUSB_TX,
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0, 0, (void *) buf, size, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_TX: %d\n", res);
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dsc->error = 1;
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}
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}
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/* ----- Driver-specific hacks --------------------------------------------- */
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void *atusb_dev_handle(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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return dsc->dev;
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}
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