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git://projects.qi-hardware.com/ben-wpan.git
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387 lines
7.2 KiB
C
387 lines
7.2 KiB
C
/*
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* lib/atusb.c - ATUSB access functions library (USB version)
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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 <stdio.h>
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#include <usb.h>
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#include "atusb/ep0.h"
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#include "atusb/usb-ids.h"
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#include "usbopen.h"
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#include "driver.h"
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#define FROM_DEV ATUSB_FROM_DEV(0)
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#define TO_DEV ATUSB_TO_DEV(0)
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struct atusb_dsc {
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usb_dev_handle *dev;
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int error;
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};
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/* ----- error handling ---------------------------------------------------- */
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static 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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static 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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static 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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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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fprintf(stderr, ":-(\n");
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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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return dsc;
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}
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static 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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static 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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static 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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static 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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/* ----- register access --------------------------------------------------- */
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static void atusb_reg_write(void *handle, uint8_t reg, uint8_t value)
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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_REG_WRITE, value, reg,
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NULL, 0, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_REG_WRITE: %d\n", res);
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dsc->error = 1;
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}
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}
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static uint8_t atusb_reg_read(void *handle, uint8_t reg)
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{
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struct atusb_dsc *dsc = handle;
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uint8_t value = 0;
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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_REG_READ, 0, reg,
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(void *) &value, 1, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_REG_READ: %d\n", res);
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dsc->error = 1;
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}
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return value;
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}
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/* ----- frame buffer access ----------------------------------------------- */
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static void atusb_buf_write(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_BUF_WRITE, 0, 0,
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(void *) buf, size, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_BUF_WRITE: %d\n", res);
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dsc->error = 1;
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}
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}
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static int atusb_buf_read(void *handle, 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 -1;
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res = usb_control_msg(dsc->dev, FROM_DEV, ATUSB_BUF_READ, 0, 0,
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buf, size, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_BUF_READ: %d\n", res);
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dsc->error = 1;
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}
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return res;
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}
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/* ----- SRAM access ------------------------------------------------------- */
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static void atusb_sram_write(void *handle, uint8_t addr, uint8_t value)
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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_SRAM_WRITE, 0, addr,
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&value, 1, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_SRAM_WRITE: %d\n", res);
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dsc->error = 1;
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}
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}
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static uint8_t atusb_sram_read(void *handle, uint8_t addr)
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{
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struct atusb_dsc *dsc = handle;
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uint8_t value = 0;
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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_SRAM_READ, 0, addr,
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(void *) &value, 1, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_SRAM_READ: %d\n", res);
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dsc->error = 1;
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}
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return value;
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}
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/* ----- SLP_TR ------------------------------------------------------------ */
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static 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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static int atusb_interrupt(void *handle)
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{
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struct atusb_dsc *dsc = handle;
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uint8_t buf;
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int res;
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if (dsc->error)
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return -1;
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res = usb_control_msg(dsc->dev, FROM_DEV, ATUSB_POLL_INT, 0, 0,
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(void *) &buf, 1, 1000);
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if (res < 0) {
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fprintf(stderr, "ATUSB_POLL_INT: %d\n", res);
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dsc->error = 1;
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return -1;
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}
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return buf;
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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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static 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_reg_write, dsc, mhz);
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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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/* ----- driver interface -------------------------------------------------- */
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struct atrf_driver atusb_driver = {
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.name = "usb",
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.open = atusb_open,
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.close = atusb_close,
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.error = atusb_error,
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.clear_error = atusb_clear_error,
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.reset = atusb_reset,
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.reset_rf = atusb_reset_rf,
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.test_mode = atusb_test_mode,
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.slp_tr = atusb_slp_tr,
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.set_clkm = atusb_set_clkm,
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.reg_write = atusb_reg_write,
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.reg_read = atusb_reg_read,
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.buf_write = atusb_buf_write,
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.buf_read = atusb_buf_read,
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.sram_write = atusb_sram_write,
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.sram_read = atusb_sram_read,
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.interrupt = atusb_interrupt,
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};
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