473 lines
12 KiB
C
473 lines
12 KiB
C
/* MSPDebug - debugging tool for MSP430 MCUs
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* Copyright (C) 2009-2012 Daniel Beer
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* Copyright (C) 2012-2015 Peter Bägel
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* Driver for parallel port interface like the Olimex MSP430-JTAG
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* Starting point was the goodfet driver
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*
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* 2012-10-03 initial release Peter Bägel (DF5EQ)
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* 2014-12-26 single step implemented Peter Bägel (DF5EQ)
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* 2015-02-21 breakpoints implemented Peter Bägel (DF5EQ)
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "util.h"
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#include "output.h"
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#include "pif.h"
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#include "jtaglib.h"
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#include "ctrlc.h"
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struct pif_device {
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struct jtdev jtag;
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};
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/*============================================================================*/
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/* pif MSP430 JTAG operations */
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/*----------------------------------------------------------------------------*/
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/* Read a word-aligned block from any kind of memory
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* returns the number of bytes read or -1 on failure
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*/
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static int read_words(device_t dev, const struct chipinfo_memory *m,
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address_t addr, address_t len, uint8_t *data)
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{
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struct pif_device *pif = (struct pif_device *)dev;
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struct jtdev *p = &pif->jtag;
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unsigned int index;
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unsigned int word;
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for ( index = 0; index < len; index += 2 ) {
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word = jtag_read_mem( p, 16, addr+index );
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data[index] = word & 0x00ff;
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data[index+1] = (word >> 8) & 0x00ff;
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}
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return p->failed ? -1 : len;
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}
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/*----------------------------------------------------------------------------*/
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/* Write a word to RAM */
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static int write_ram_word( struct jtdev *p, address_t addr,
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uint16_t value )
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{
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jtag_write_mem( p, 16, addr, value );
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return p->failed ? -1 : 0;
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}
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/*----------------------------------------------------------------------------*/
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/* Write a word-aligned flash block. */
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/* The starting address must be within the flash memory range. */
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static int write_flash_block( struct jtdev *p, address_t addr,
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address_t len,
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const uint8_t *data)
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{
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unsigned int i;
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uint16_t *word;
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word = malloc( len / 2 * sizeof(*word) );
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if (!word) {
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pr_error("pif: failed to allocate memory");
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return -1;
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}
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for(i = 0; i < len/2; i++) {
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word[i]=data[2*i] + (((uint16_t)data[2*i+1]) << 8);
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}
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jtag_write_flash( p, addr, len/2, word );
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free(word);
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return p->failed ? -1 : 0;
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}
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/* Write a word-aligned block to any kind of memory.
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* returns the number of bytes written or -1 on failure
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*/
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static int write_words(device_t dev, const struct chipinfo_memory *m,
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address_t addr, address_t len, const uint8_t *data)
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{
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struct pif_device *pif = (struct pif_device *)dev;
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struct jtdev *p = &pif->jtag;
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int r;
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if (m->type != CHIPINFO_MEMTYPE_FLASH) {
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len = 2;
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r = write_ram_word(p, addr, r16le(data));
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} else {
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r = write_flash_block(p, addr, len, data);
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}
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if (r < 0) {
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printc_err("pif: write_words at address 0x%x failed\n", addr);
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return -1;
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}
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return len;
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}
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/*----------------------------------------------------------------------------*/
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static int init_device(struct jtdev *p)
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{
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unsigned int jtag_id;
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printc_dbg("Starting JTAG\n");
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jtag_id = jtag_init(p);
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printc("JTAG ID: 0x%02x\n", jtag_id);
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if (jtag_id != 0x89 && jtag_id != 0x91) {
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printc_err("pif: unexpected JTAG ID: 0x%02x\n", jtag_id);
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jtag_release_device(p, 0xfffe);
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return -1;
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}
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return 0;
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}
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/*===== MSPDebug Device interface ============================================*/
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/*----------------------------------------------------------------------------*/
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static int pif_readmem( device_t dev_base,
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address_t addr,
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uint8_t* mem,
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address_t len )
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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dev->jtag.failed = 0;
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return readmem(dev_base, addr, mem, len, read_words);
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}
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/*----------------------------------------------------------------------------*/
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static int pif_writemem( device_t dev_base,
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address_t addr,
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const uint8_t* mem,
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address_t len )
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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dev->jtag.failed = 0;
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return writemem(dev_base, addr, mem, len, write_words, read_words);
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}
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/*----------------------------------------------------------------------------*/
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static int pif_getregs(device_t dev_base, address_t *regs)
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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int i;
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dev->jtag.failed = 0;
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for (i = 0; i < DEVICE_NUM_REGS; i++)
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regs[i] = jtag_read_reg(&dev->jtag, i);
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return dev->jtag.failed ? -1 : 0;
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}
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/*----------------------------------------------------------------------------*/
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static int pif_setregs( device_t dev_base, const address_t* regs )
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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int i;
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dev->jtag.failed = 0;
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for (i = 0; i < DEVICE_NUM_REGS; i++) {
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jtag_write_reg( &dev->jtag, i, regs[i] );
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}
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return dev->jtag.failed ? -1 : 0;
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}
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/*----------------------------------------------------------------------------*/
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static int pif_ctl(device_t dev_base, device_ctl_t type)
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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dev->jtag.failed = 0;
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switch (type) {
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case DEVICE_CTL_RESET:
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/* perform soft reset */
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jtag_execute_puc(&dev->jtag);
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break;
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case DEVICE_CTL_RUN:
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/* transfer changed breakpoints to device */
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if (jtag_refresh_bps("pif", &dev->jtag.base, &dev->jtag) < 0) {
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return -1;
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}
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/* start program execution at current PC */
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jtag_release_device(&dev->jtag, 0xffff);
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break;
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case DEVICE_CTL_HALT:
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/* take device under JTAG control */
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jtag_get_device(&dev->jtag);
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break;
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case DEVICE_CTL_STEP:
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/* execute next instruction at current PC */
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jtag_single_step(&dev->jtag);
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break;
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default:
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printc_err("pif: unsupported operation\n");
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return -1;
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}
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return dev->jtag.failed ? -1 : 0;
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}
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/*----------------------------------------------------------------------------*/
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static device_status_t pif_poll(device_t dev_base)
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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if (delay_ms(100) < 0 || ctrlc_check())
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return DEVICE_STATUS_INTR;
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if (jtag_cpu_state(&dev->jtag) == 1) {
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return DEVICE_STATUS_HALTED;
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}
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return DEVICE_STATUS_RUNNING;
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}
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/*----------------------------------------------------------------------------*/
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static int pif_erase( device_t dev_base,
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device_erase_type_t type,
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address_t addr )
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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dev->jtag.failed = 0;
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switch(type) {
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case DEVICE_ERASE_MAIN:
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jtag_erase_flash ( &dev->jtag, JTAG_ERASE_MAIN, addr );
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break;
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case DEVICE_ERASE_ALL:
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jtag_erase_flash ( &dev->jtag, JTAG_ERASE_MASS, addr );
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break;
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case DEVICE_ERASE_SEGMENT:
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jtag_erase_flash ( &dev->jtag, JTAG_ERASE_SGMT, addr );
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break;
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default:
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return -1;
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}
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return dev->jtag.failed ? -1 : 0;
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}
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/*----------------------------------------------------------------------------*/
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static int pif_getconfigfuses(device_t dev_base)
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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return jtag_get_config_fuses(&dev->jtag);
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}
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/*----------------------------------------------------------------------------*/
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static device_t pif_open(const struct device_args *args)
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{
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struct pif_device *dev;
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if (!(args->flags & DEVICE_FLAG_TTY)) {
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printc_err("pif: this driver does not support raw USB access\n");
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return NULL;
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}
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if (!(args->flags & DEVICE_FLAG_JTAG)) {
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printc_err("pif: this driver does not support Spy-Bi-Wire\n");
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return NULL;
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}
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dev = malloc(sizeof(*dev));
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if (!dev) {
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printc_err("pif: malloc: %s\n", last_error());
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return NULL;
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}
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memset(dev, 0, sizeof(*dev));
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dev->jtag.base.type = &device_pif;
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dev->jtag.base.max_breakpoints = 2; //supported by all devices
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dev->jtag.base.need_probe = 1;
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(&dev->jtag)->f = &jtdev_func_pif;
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if ((&dev->jtag)->f->jtdev_open(&dev->jtag, args->path) < 0) {
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printc_err("pif: can't open port\n");
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free(dev);
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return NULL;
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}
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if (init_device(&dev->jtag) < 0) {
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printc_err("pif: initialization failed\n");
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free(dev);
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return NULL;
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}
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return &dev->jtag.base;
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}
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/*----------------------------------------------------------------------------*/
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static device_t gpio_open(const struct device_args *args)
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{
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struct pif_device *dev;
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if (!(args->flags & DEVICE_FLAG_TTY)) {
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printc_err("gpio: this driver does not support raw USB access\n");
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return NULL;
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}
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if (!(args->flags & DEVICE_FLAG_JTAG)) {
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printc_err("gpio: this driver does not support Spy-Bi-Wire\n");
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return NULL;
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}
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dev = malloc(sizeof(*dev));
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if (!dev) {
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printc_err("gpio: malloc: %s\n", last_error());
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return NULL;
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}
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memset(dev, 0, sizeof(*dev));
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dev->jtag.base.type = &device_pif;
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dev->jtag.base.max_breakpoints = 0;
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(&dev->jtag)->f = &jtdev_func_gpio;
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if ((&dev->jtag)->f->jtdev_open(&dev->jtag, args->path) < 0) {
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printc_err("gpio: can't open port\n");
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free(dev);
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return NULL;
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}
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if (init_device(&dev->jtag) < 0) {
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printc_err("gpio: initialization failed\n");
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free(dev);
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return NULL;
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}
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return &dev->jtag.base;
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}
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/*----------------------------------------------------------------------------*/
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static device_t bp_open(const struct device_args *args)
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{
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struct pif_device *dev;
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if (!(args->flags & DEVICE_FLAG_TTY)) {
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printc_err("bp: this driver does not support raw USB access\n");
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return NULL;
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}
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if (!(args->flags & DEVICE_FLAG_JTAG)) {
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printc_err("bp: this driver does not support Spy-Bi-Wire\n");
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return NULL;
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}
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dev = malloc(sizeof(*dev));
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if (!dev) {
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printc_err("bp: malloc: %s\n", last_error());
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return NULL;
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}
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memset(dev, 0, sizeof(*dev));
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dev->jtag.base.type = &device_pif;
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dev->jtag.base.max_breakpoints = 2; //supported by all devices
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dev->jtag.base.need_probe = 1;
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(&dev->jtag)->f = &jtdev_func_bp;
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if ((&dev->jtag)->f->jtdev_open(&dev->jtag, args->path) < 0) {
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printc_err("bp: can't open port\n");
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free(dev);
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return NULL;
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}
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if (init_device(&dev->jtag) < 0) {
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printc_err("bp: initialization failed\n");
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free(dev);
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return NULL;
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}
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return &dev->jtag.base;
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}
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/*----------------------------------------------------------------------------*/
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static void pif_destroy(device_t dev_base)
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{
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struct pif_device *dev = (struct pif_device *)dev_base;
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dev->jtag.failed = 0;
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jtag_release_device(&dev->jtag, 0xfffe);
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(&dev->jtag)->f->jtdev_close(&dev->jtag);
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free(dev);
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}
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/*----------------------------------------------------------------------------*/
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const struct device_class device_pif = {
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.name = "pif",
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.help = "Parallel Port JTAG",
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.open = pif_open,
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.destroy = pif_destroy,
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.readmem = pif_readmem,
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.writemem = pif_writemem,
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.getregs = pif_getregs,
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.setregs = pif_setregs,
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.ctl = pif_ctl,
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.poll = pif_poll,
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.erase = pif_erase,
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.getconfigfuses = pif_getconfigfuses
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};
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const struct device_class device_gpio = {
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.name = "gpio",
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.help = "/sys/class/gpio direct connect",
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.open = gpio_open,
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.destroy = pif_destroy,
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.readmem = pif_readmem,
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.writemem = pif_writemem,
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.getregs = pif_getregs,
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.setregs = pif_setregs,
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.ctl = pif_ctl,
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.poll = pif_poll,
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.erase = pif_erase,
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.getconfigfuses = pif_getconfigfuses
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};
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const struct device_class device_bp = {
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.name = "bus-pirate",
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.help = "Bus Pirate JTAG, MISO-TDO, MOSI-TDI, CS-TMS, AUX-RESET, CLK-TCK",
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.open = bp_open,
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.destroy = pif_destroy,
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.readmem = pif_readmem,
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.writemem = pif_writemem,
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.getregs = pif_getregs,
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.setregs = pif_setregs,
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.ctl = pif_ctl,
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.poll = pif_poll,
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.erase = pif_erase,
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.getconfigfuses = pif_getconfigfuses
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};
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