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ben-wpan/tools/lib/atusb-common.c

288 lines
5.7 KiB
C

/*
* lib/atusb-common.c - ATUSB access functions shared by all ATUSB drivers
*
* Written 2010-2011 by Werner Almesberger
* Copyright 2010-2011 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 <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <usb.h>
#include <errno.h>
#include "atusb/ep0.h"
#include "atusb/usb-ids.h"
#include "at86rf230.h"
#include "usbopen.h"
#include "driver.h"
#include "atusb-common.h"
/* ----- error handling ---------------------------------------------------- */
int atusb_error(void *handle)
{
struct atusb_dsc *dsc = handle;
return dsc->error;
}
int atusb_clear_error(void *handle)
{
struct atusb_dsc *dsc = handle;
int ret;
ret = dsc->error;
dsc->error = 0;
return ret;
}
/* ----- open/close -------------------------------------------------------- */
void *atusb_open(const char *arg)
{
usb_dev_handle *dev;
struct atusb_dsc *dsc;
int res;
usb_unrestrict();
if (arg)
restrict_usb_path(arg);
dev = open_usb(USB_VENDOR, USB_PRODUCT);
if (!dev) {
if (errno == EPERM)
fprintf(stderr, "Permission denied. "
"You may need to become root.\n");
else
fprintf(stderr, ":-(\n");
return NULL;
}
res = usb_claim_interface(dev, 0);
if (res == -EPERM) {
fprintf(stderr,
"Permission denied. You may need to become root.\n");
return NULL;
}
if (res) {
fprintf(stderr, "usb_claim_interface: %d\n", res);
return NULL;
}
dsc = malloc(sizeof(*dsc));
if (!dsc) {
perror("malloc");
exit(1);
}
dsc->dev = dev;
dsc->error = 0;
atusb_driver.reg_read(dsc, REG_IRQ_STATUS);
return dsc;
}
void atusb_close(void *handle)
{
/* to do */
}
/* ----- device mode ------------------------------------------------------- */
void atusb_reset(void *handle)
{
struct atusb_dsc *dsc = handle;
int res;
if (dsc->error)
return;
res =
usb_control_msg(dsc->dev, TO_DEV, ATUSB_RESET, 0, 0, NULL, 0, 1000);
if (res < 0) {
fprintf(stderr, "ATUSB_RESET: %d\n", res);
dsc->error = 1;
}
}
void atusb_reset_rf(void *handle)
{
struct atusb_dsc *dsc = handle;
int res;
if (dsc->error)
return;
res = usb_control_msg(dsc->dev, TO_DEV, ATUSB_RF_RESET, 0, 0, NULL,
0, 1000);
if (res < 0) {
fprintf(stderr, "ATUSB_RF_RESET: %d\n", res);
dsc->error = 1;
}
}
void atusb_test_mode(void *handle)
{
struct atusb_dsc *dsc = handle;
int res;
if (dsc->error)
return;
res =
usb_control_msg(dsc->dev, TO_DEV, ATUSB_TEST, 0, 0, NULL, 0, 1000);
if (res < 0) {
fprintf(stderr, "ATUSB_TEST: %d\n", res);
dsc->error = 1;
}
}
/* ----- SLP_TR ------------------------------------------------------------ */
void atusb_slp_tr(void *handle, int on, int pulse)
{
struct atusb_dsc *dsc = handle;
int res;
if (dsc->error)
return;
if (!on || !pulse) {
fprintf(stderr,
"SLP_TR mode on=%d pulse=%d not supported\n", on, pulse);
return;
}
res = usb_control_msg(dsc->dev, TO_DEV, ATUSB_SLP_TR, 0, 0, NULL, 0,
1000);
if (res < 0) {
fprintf(stderr, "ATUSB_SLP_TR: %d\n", res);
dsc->error = 1;
}
}
/* ----- RF interrupt ------------------------------------------------------ */
/*
* The logic here is a bit tricky. Assuming that we can get a lot of
* interrupts, system state can change as follows:
*
* Event IRQ_STATUS EP1 on atusb EP1 on host irq
* INT (var)
* -------------------- ------- --- ------------ ----------- -----
* interrupt A A H EP_IDLE - -
* INT0 handler - - EP_TX (A) - -
* interrupt B B H EP_TX (A) - -
* INT0 handler B H EP_TX (A) - -
* IN from host B H EP_IDLE A -
* interrupt C B+C H EP_IDLE A -
* call to atusb_interrupt_wait
* read IRQ_STATUS - - EP_IDLE A B+C
* interrupt D D H EP_IDLE A B+C
* INT0 handler - - EP_TX (D) A B+C
* IN from host - - EP_IDLE A, D B+C
* usb_bulk_read - - EP_IDLE - A+B+C+D
* usb_bulk_read -> no more data, done
*
* We therefore have to consider interrupts queued up at the host and pending
* in REG_IRQ_STATUS in addition to anything that may arrive while we wait.
*/
int atusb_interrupt_wait(void *handle, int timeout_ms)
{
struct atusb_dsc *dsc = handle;
char buf;
int res;
if (dsc->error)
return 0;
res = usb_bulk_read(dsc->dev, 1,
(char *) &buf, sizeof(buf), timeout_ms);
if (res == -ETIMEDOUT)
return 0;
if (res < 0) {
fprintf(stderr, "usb_bulk_read: %d\n", res);
dsc->error = 1;
return 0; /* handle this via atrf_error */
}
return atusb_driver.reg_read(handle, REG_IRQ_STATUS);
}
/* ----- CLKM handling ----------------------------------------------------- */
/*
* ATmega32U2-based boards don't allow disabling CLKM, so we keep it at 8 MHz.
* We could accommodate a choice between 8 MHz and 16 MHz, but that's for
* later.
*/
int atusb_set_clkm(void *handle, int mhz)
{
struct atusb_dsc *dsc = handle;
uint8_t ids[3];
int res;
if (dsc->error)
return 0;
res = usb_control_msg(dsc->dev, FROM_DEV, ATUSB_ID, 0, 0,
(void *) ids, 3, 1000);
if (res < 0) {
fprintf(stderr, "ATUSB_ID: %s\n", usb_strerror());
dsc->error = 1;
return 0;
}
switch (ids[2]) {
case HW_TYPE_100813:
case HW_TYPE_101216:
break;
case HW_TYPE_110131:
if (mhz == 0 || mhz == 8)
return 1;
fprintf(stderr, "this board only supports CLKM = 8 MHz\n");
return 0;
default:
fprintf(stderr,
"atusb_set_clkm: unknown hardware type 0x%02x\n", ids[2]);
return 0;
}
return atrf_set_clkm_generic(atusb_driver.reg_write, dsc, mhz);
}
/* ----- Driver-specific hacks --------------------------------------------- */
void *atusb_dev_handle(void *handle)
{
struct atusb_dsc *dsc = handle;
return dsc->dev;
}